WO2014112381A1 - 液状物の吐出装置 - Google Patents
液状物の吐出装置 Download PDFInfo
- Publication number
- WO2014112381A1 WO2014112381A1 PCT/JP2014/000201 JP2014000201W WO2014112381A1 WO 2014112381 A1 WO2014112381 A1 WO 2014112381A1 JP 2014000201 W JP2014000201 W JP 2014000201W WO 2014112381 A1 WO2014112381 A1 WO 2014112381A1
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- WO
- WIPO (PCT)
- Prior art keywords
- syringe
- needle
- functional cartridge
- valve
- armature
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/02—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to surfaces by single means not covered by groups B05C1/00 - B05C7/00, whether or not also using other means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
Definitions
- the present invention is a device for discharging a liquid (also referred to as a valve) for precisely discharging a small amount of a liquid such as an adhesive or a silicone resin liquid onto a circuit board, for example, when mounting an electronic component or the like on a circuit board. It is about
- the device for dispensing liquid material comprises a frame having an upper bracket portion and a lower bracket portion, the frame being designed to fit the largest syringe size meeting the purpose of use, and removable from the upper bracket portion of the frame
- the actuator is operated by a body provided with a screw at the upper end and a mounting portion at the lower end with the insertion portion to be inserted into the syringe at the lower end, the actuator mounted at the screw provided at the upper end of the body, and the actuator
- the syringe is provided with a valve stem and a valve seat member attached to the tip of the syringe and attached to the lower bracket portion, and the valve mechanism including the valve stem and the valve seat member at the tip of the syringe is opened and closed by the actuator. It is made to discharge the liquid inside.
- a solenoid is used as an actuator, and a valve stem in which a disk-like armature and a needle are integrated is magnetically attracted by a solenoid while a spring installed between the solenoid and the armature
- the solenoid is vertically movably attached to the body by being screwed into a screw at the upper end of the body, and the stroke amount of the valve stem can be adjusted by adjusting the gap between the solenoid and the armature.
- the solenoid (actuator) and the body and the syringe are provided so as to be set between the upper bracket and the lower bracket of the frame in a state in which they are mutually connected via the body and integrated as a dispensing mechanism.
- the needle portion of the valve stem is inserted from the upper opening of the body, and the needle portion is penetrated through the body to protrude from the insertion portion at the lower end of the body and the solenoid is accommodated in the internal space of the valve
- the solenoid is integrated with the body and syringe by mounting the syringe on the insertion part of the body while screwing the screw into the screw at the top of the body and taking the needle part protruding from the loading part at the lower end of the body into the syringe ing.
- the body of the body is inserted into the bifurcated upper bracket while fitting the valve seat portion at the tip of the syringe into the lower bracket, and the neck is fixed in a hooked manner. Furthermore, by rotating the body by 90 ° in that state, the gas holes drilled in the upper bracket and the through holes drilled in the body are communicated to introduce the discharge gas into the syringe, and the syringe It is provided to apply discharge pressure to the inside and move the syringe to its original position by the pressure.
- a valve stem having an integrated structure of an armature portion and a needle portion is inserted so that the armature portion is sandwiched between the body and the actuator, and the body is penetrated. Since the needle portion is inserted into the syringe and the actuator and the body and the syringe are integrated and set between the upper bracket and the lower bracket of the frame body, the syringe is used for refilling the liquid material. At the time of replacement, not only the syringe but also the syringe and the body and the actuator must be simultaneously removed from the upper and lower brackets of the frame body before the syringe is replaced.
- valve stem including the armature portion and the needle portion of the disk structure is integrally formed by combining a plurality of parts, the processing accuracy of each part is increased to improve the coaxiality. There is a problem that the cost is high because it is required with high accuracy.
- the actuator, the body, and the syringe are integrally mounted on the frame in a state in which the armature portion and the needle portion incorporate the valve stem having an integrated structure, it is difficult to maintain the coaxiality of the respective parts.
- the needle valve body
- the needle is eccentrically fitted to the valve seat, which causes a reduction in the valve durability and may affect the stability of the discharge amount.
- the straightness of the droplets when discharged may be impaired. That is, due to the eccentricity of the opening state of the discharge part, the jumping out state of the discharged liquid becomes worse, which may result in the situation where the liquid material can not be discharged or dropped straight. Furthermore, if the coaxiality between the actuator and the needle and the valve seat is not sufficiently ensured, the shaft may slightly rotate due to the eccentricity in the vertical movement of the armature for each discharge operation of the liquid. It may affect the discharge amount fluctuation.
- the amount of stroke of the valve stem is adjusted by adjusting the gap between the body and the solenoid by screwing the solenoid to the screw portion of the upper end of the body fixed to the upper bracket of the frame. Since the adjustment is made, the load of the spring itself which pushes back the valve stem to the fixed position is also increased / decreased simultaneously with the adjustment of the stroke amount. Therefore, the initial load accompanying suction from the armature solenoid is affected by the spring load strength that depresses the valve stem, causing the pulling speed to be slowed at the initial stage of excitation, which causes a delay in the valve opening response, and the discharge amount is the target Give influence such as getting out of value.
- This phenomenon is particularly noticeable when narrowing the gap between the body and the solenoid, that is, when discharging a small amount.
- the delay in the movement of the valve stem at the initial stage of excitation also becomes an obstacle when opening and closing the valve for a very short time. That is, for example, in the case where control is performed so as to obtain a predetermined discharge amount by opening the desired stroke amount in a short time of less than 5 ms, 3 ms, or 1 ms, the control is not limited to solenoids.
- the valve stem since it takes time for the valve stem, which always receives the force of the spring to return to the home position, to start moving, there is a problem that the actual valve opening time is reduced to an unignorable degree. The influence is exerted more as the opening time is originally smaller, and appears as a problem that the discharge amount is not constant when discharging a small amount.
- the upper bracket and the lower bracket are only supported in a cantilever manner by the tie-lot, and the rigidity against the load in the axial direction is low.
- the air pressure for discharging the liquid material When the pressure acts on the inside of the syringe, and also when the air pressure is slightly increased or decreased in the range of about 0.1 MPa to 0.4 MPa, there is a problem that the lower bracket inclines slightly and the position of the discharge destination shifts. .
- the frame has low rigidity in the longitudinal and axial directions and easily spreads between the upper bracket and the lower bracket, and the body neck portion is inserted between the forked portion of the upper bracket and the actuator and Since the body and the syringe must be set in an integrated state between the upper bracket and the lower bracket of the frame body, the upper bracket and the lower bracket have to be set somewhat wider, and the valve seat assembly
- the syringe is not sufficiently screwed into the syringe, i.e., the entire length becomes longer by the screwing insufficiency than the original length, this is accepted. For this reason, when air pressure for discharge is applied, liquid leakage may occur due to insufficient tightening between the syringe and the valve seat assembly.
- the structure for adjusting the stroke amount of the valve stem by turning the solenoid itself causes the valve stem to be bent because a large torque is applied to the valve stem, so that the zero point can not be accurately determined and thus accurate. It is difficult to grasp the stroke.
- liquid discharge apparatus until now is configured for a syringe or for a functional cartridge, and there is no device that can be commonly used for a syringe and a functional module.
- An object of the present invention is to provide a discharge device for liquid material whose liquid contact portion can be easily removed.
- the present invention has an object to provide a liquid material discharge device in which only a valve seat assembly and a syringe or a functional cartridge including a needle that opens and closes the valve seat assembly can be removed.
- Another object of the present invention is to provide a valve that functions only as a system for driving a needle for adjusting the discharge amount.
- Another object of the present invention is to provide a liquid discharge apparatus capable of accurately discharging a small amount of liquid.
- the invention according to claim 1 relates to the opening and closing of the needle valve by the actuator under the working gas to which the discharge of the liquid in the syringe or the liquid supplied through the functional cartridge is applied. And a valve seat assembly attached to the tip of a syringe or a functional cartridge, and inserted into the inside of the syringe or functional cartridge to constitute a needle valve between the valve seat assembly and the valve seat assembly.
- a driven member and a positioning member which connects the syringe or functional cartridge by advancing and retracting the driven member with respect to the syringe or functional cartridge and biases the syringe or functional cartridge toward a fixed position
- the valve seat assembly, the needle being inserted by magnetically coupling the needle contained in the syringe or the functional cartridge and the driven member in the valve body by magnetic coupling.
- the syringe or the functional cartridge can be detached from the valve body as it is.
- the valve body comprises at least a junction box, a nozzle base for receiving and holding the valve seat assembly, and a platform for connecting them and defining a syringe accommodation space between the nozzle base and the junction box,
- the box includes an actuator, a driven member, and a positioning member, and the positioning member is connected to the syringe or the functional cartridge to supply the working gas supplied via the junction box to the syringe or the functional cartridge
- the path is established.
- the actuator is a solenoid, and an armature and a connecting member as a driven member are incorporated in the valve main body together with the solenoid, and the movement of the armature attracted by exciting the solenoid is connected.
- it is provided to transmit to the needle through the member.
- the armature and the connecting member are separate structures that can be separated, and an axial gap is set between the armature in the standby position and the connecting member in the fixed position, and the actuator is driven by the actuator.
- the armature and the connecting member are provided so as to move the needles together.
- the positioning member has a connecting portion at its lower part that engages with the syringe or functional cartridge, and when the positioning member descends, it engages with the syringe or functional cartridge to connect the center of the syringe or functional cartridge
- the platform preferably has a U-shaped cross section surrounding three sides of the left and right sides and the back except for the front side where the syringe or functional cartridge is taken in and out.
- the apparatus for discharging a liquid according to the present invention is provided with windows through which syringes or functional cartridges can be seen on the left and right side walls of the platform, and a discharge rod penetrating through the syringe receiving space is disposed through the windows. It is preferable that the syringe or the functional cartridge in the syringe accommodation space is pushed out by the exclusion rod by moving the to the front side.
- a magnet for attracting the armature is disposed on the surface of the valve main body opposite to the actuator across the armature, and the magnet is provided so as to return to the standby position by attracting the armature not only by its own weight but also by magnetic force. Is preferred.
- a valve stroke adjustment mechanism that regulates the rising end of the needle and an urging mechanism that always applies an urging force for pushing the needle back to a fixed position are independent of each other.
- the valve body is provided so that the stroke amount of the needle can be adjusted under a constant biasing force.
- the biasing mechanism for always applying a biasing force for pushing the needle back to the fixed position makes the length of the space accommodating the biasing mechanism variable and adjusts the biasing force of the biasing mechanism steplessly
- the collar may be accommodated at the top of the space accommodating the biasing mechanism, and the collar may be replaced with another collar having a different height to change the effective length of the space accommodating the biasing mechanism.
- the biasing force of the biasing mechanism may be adjustable. More preferably, the biasing mechanism includes a plurality of magnets, and the same polarity is disposed to face each other.
- the liquid discharge device according to the present invention is characterized in that the upper end surface of the top of the needle is formed in a spherical shape.
- the axial effective length of the syringe accommodation space is longer than the entire length of the syringe or the functional cartridge when the valve seat assembly and the needle are mounted at fixed positions. It is set to a length shorter than the length when the tightening of the valve assembly attached to the tip of the syringe or functional cartridge causes a leak of the liquid inside, and the valve seat in the syringe accommodation space
- the construction is such that a syringe or a functional cartridge, which lacks tightening of the assembly, can not enter.
- the valve main body has a syringe accommodation space of a size that accommodates the largest capacity syringe or functional cartridge assumed to be used, and the syringe or functional cartridge of multiple sizes. Large enough to fit in the syringe accommodation space by adjusting the syringe length or the functional cartridge length by using either one or both of the universal type adapter connectable to and the multiple extension rods with different lengths. Can be mounted, and the adapter has a plug at the upper end to be connected to the positioning member and has a plug corresponding to the opening of the syringe or functional cartridge to be connected.
- the extension rod has an upper end plug portion to be connected to the positioning member, and an adapter Alternatively, it is preferable to have a lower end plug portion directly connected to the corresponding syringe or functional cartridge.
- the device for discharging a liquid according to the present invention has a guide portion on the valve body side, and abuts the guide portion against a portion adjacent to the plug portion connected to the positioning member of the adapter or extension rod. Preferably, position control to the depth side is performed.
- valve stroke adjustment mechanism is provided with a torque limiter, and when the torque equal to or greater than a set value is applied to the valve stroke adjustment mechanism, the zero point can be accurately obtained by idling.
- the apparatus for discharging a liquid includes a lockup sleeve accommodated in the internal space of the junction box, and the connection member and the positioning member are accommodated in the lockup sleeve and then accommodated in the junction box and locked.
- the up sleeve has a projecting dowel on its circumferential surface, and on the inner peripheral wall defining the interior space of the junction box accommodating the lock up sleeve, a dowel hole and a circumferential lateral groove connected to the dowel hole and the junction box
- the lock-up sleeve and the junction box are integrated by inserting the dowel into the dowel hole at the end thereof through the guide groove with an L-shaped guide groove consisting of an axial longitudinal groove leading to the opening.
- the actuator built in the valve main body and the syringe inserted in the side of the functional cartridge are separated and separated by magnetic coupling. Being able to connect, the syringe or the functional cartridge with the needle inserted and the seat valve assembly installed can be easily mounted on the valve body as it is and can be easily removed from the valve body It is.
- the actuator incorporated in the valve body does not detach from the valve body when attaching or detaching the syringe or the functional cartridge, and the syringe or the functional cartridge is the syringe accommodation space of the valve body even when attaching the syringe again.
- the actuator and the needle since the actuator and the needle are strongly connected by magnetic attraction, the actuator and the needle may have some misalignment or inclination. Does not affect the transfer of the axial movement of the needle to the needle. Therefore, if the degree of coaxiality between at least the needle inserted into the syringe or the functional cartridge and the valve seat is maintained, the eccentricity or eccentricity of the core between the actuator and the needle may occur. There is no rotation caused by That is, there is no need for strict concentricity between the member on the actuator side and the member on the needle side, and coaxiality in the syringe or functional cartridge can be maintained independently even if there is some misalignment or inclination. The straightness of the needle is secured, and there is no hindrance to the driving of the needle. For this reason, since the total coaxiality between each part is not required so much, the processing cost and time for each part can be significantly reduced.
- the actuator and the needle are interlocked by the magnetic coupling, and the linearity of the needle capable of maintaining the coaxiality in the syringe or the functional cartridge independently is secured, the space between the actuator and the needle Even if the degree of coaxiality is not sufficiently ensured, the needle does not rotate due to the eccentricity at every discharge operation of the liquid, and the needle does not eccentrically hit the valve seat. For this reason, the valve seat is not reduced in size, and the durability of the valve is not impaired, the discharge amount is not unstable, and the straightness of the discharged droplet is not impaired.
- the device for discharging a liquid according to claim 1 is a syringe or a functional device because the needle inserted into the syringe or the functional cartridge is suspended by the magnetic attraction force with the actuator of the valve body. It becomes possible to hold the cartridge independently.
- the syringe or functional cartridge is biased toward the fixed position by the positioning member and set in the fixed position, the position of the syringe or functional cartridge is shifted during the discharge operation, and the valve opening / closing amount / stroke amount fluctuates As a result, it is possible to avoid the situation where the discharge amount fluctuates and control of the discharge amount, in particular, control in small amount discharge can be performed with high accuracy.
- the valve body at least comprises a junction box, a nozzle base, and a platform connecting these to define a syringe accommodation space
- the junction box further comprises an actuator Since a member driven in the vertical direction by the actuator and a positioning member for detaching the syringe or the functional cartridge by the vertical movement are provided, the syringe or the functional cartridge is set in the syringe accommodation space and at the same time by the actuator. Alignment between the driven member to be driven and the needle is automatically performed by magnetic coupling and coupled.
- valve seat assembly and the syringe or the functional cartridge including the needle for opening and closing the valve seat can be set as one block to allow the valve body to be set in the syringe accommodation space and removed from the syringe accommodation space.
- the syringe is set at a fixed position by connection by fitting the syringe or functional cartridge and the positioning member, the position of the syringe or functional cartridge is shifted during the discharge operation, and the valve opening / closing amount / stroke amount fluctuates. Since the situation where the discharge amount fluctuates can be avoided, the control of the discharge amount, in particular, the control in the small amount discharge can be performed with high accuracy.
- the actuator is a solenoid and the armature and the connecting member are built in the valve body together with the solenoid as a driven member driven by the solenoid, the solenoid is excited By transmitting the movement of the armature to be suctioned to the needle through the connection member, it is possible to perform discharge with excellent responsiveness.
- the armature which is magnetically attracted by the solenoid and the connecting member interlocking with the needle are separated, and the armature and the connecting member are in the standby position.
- the time to drive the solenoid can be increased by adding time. That is, it is possible to drive the solenoid only for the time when it is necessary to actually suck the armature after securing a running time sufficient to suck the armature.
- the valve can be controlled to open by a desired stroke amount to obtain a predetermined discharge amount.
- the syringe or the functional cartridge in the state in which the needle is inserted and the seat valve assembly is mounted on the tip is attached to the valve body as it is simply by moving the positioning member up and down. Or it is removed from the valve body. Moreover, the coaxiality between the positioning member and the syringe or functional cartridge is secured simultaneously with the connection.
- the platform connecting the junction box and the nozzle base to define the syringe accommodation space has a U-shaped cross section, the overall rigidity is high and flushing air can be obtained. Even if it does, the syringe accommodation space does not expand in the longitudinal direction, and the nozzle base does not incline. Therefore, the position of the discharge destination does not shift, and the position to aim at applying the liquid, for example, the adhesive, and the aim position do not deviate.
- the syringe or the functional cartridge is largely displaced to the left or right because the maximum diameter portion on the syringe side or the functional cartridge side is accommodated with a very small gap in the syringe accommodation space of the valve body Is positioned without This facilitates centering between the syringe or functional cartridge and the valve body.
- the magnetic coupling between the needle and the connecting member is achieved by moving the discharge rods penetrating the syringe accommodation space to the front side along the windows on the left and right sides of the platform. Even if it is strong, the syringe can be easily taken out of the syringe accommodation space.
- the actuator since the armature is forcibly returned to the standby position by the attraction force of the magnet, the actuator does not delay in returning the armature to the home position, and the actuator with the quick response
- the on / off operation that is, the discharge operation can be performed. In other words, a small amount of discharge can be performed with high accuracy.
- a valve stroke adjustment mechanism for restricting the rising end of the needle and an urging mechanism for always applying an urging force for pushing the needle back to a fixed position are made independent of each other. Since it is provided on the valve body side and it is possible to adjust the stroke of the needle under a constant biasing force, the biasing force for pushing the needle back to the fixed position is constant and applied regardless of the amount of stroke Even when the small amount of discharge, that is, the stroke amount of the needle is adjusted to be small, the needle pull speed does not become slow at the initial stage of the excitation, and this causes no delay in the valve opening response. There is no influence such as deviation from the value.
- the biasing force in a stepless manner, for example, the spring load. Since it is possible to adjust the biasing force to an optimum strength according to the viscosity of the liquid, it is possible to prevent the liquid from being scattered after being discharged. Moreover, since it is not necessary to prepare in advance and replace the biasing mechanism according to the load, for example, a spring for low load or a spring for high load, the number of parts is reduced and parts management is simplified and replacement work etc. It does not take time and effort. In addition, when changing the effective length of the space by replacing the collar disposed at the top of the space that accommodates the biasing mechanism with other collars of different heights, The biasing force can be adjusted.
- the driven member contained in the valve body when tilting the syringe or the functional cartridge to remove it from the valve body there is less risk of interference and can be removed smoothly.
- the contact surface angle between the actuator and the needle connected by magnetic coupling one end of the surface to be attracted by the magnet is eliminated, so high processing accuracy of the connection surface is required I will not.
- valve assembly when trying to mount the valve assembly mounted at the end of the syringe or the functional cartridge, the valve assembly is mounted in such a state that there is a gap enough to cause leakage of the liquid inside. Can not be stored in the syringe housing space of the valve body. Therefore, appropriate management of the assembly of the syringe or the functional cartridge and the valve assembly can be easily realized, and liquid leakage due to insufficient tightening of the valve seat assembly does not occur.
- mounting of various sizes of syringes and functional cartridges can be realized with one valve body by changing the orientation of the universal type adapter and the combination of the extension rods. it can. That is, one valve can be shared not only for a wide variety of syringes but also for functional cartridges.
- the position restriction to the depth side is achieved by abutting the portion adjacent to the plug portion connected to the positioning member of the adapter or extension rod and the guide portion on the valve main body side.
- the approximate alignment is performed with respect to the descending positioning member, and the smooth fitting is possible.
- the shapes of the portions of the adapter and the extension rod in contact with the guide portions common, positioning can be performed even when syringes and functional cartridges having different sizes and shapes are attached.
- the zero point can be accurately determined by idle rotation of the valve stroke adjusting mechanism at the time of stroke adjustment of the needle. Therefore, the micro adjustment is performed by a desired amount based on the detected zero point.
- the mentment cap By turning the mentment cap, a desired gap is created at the upper end of the stroke adjustment rod, and the desired needle stroke amount can be set accurately. Accordingly, the stroke adjustment can be accurately managed even in a very small range of about 0 to 300 ⁇ m or about 400 ⁇ m, which is required for discharging the liquid material, so that the control of the discharge amount can be performed accurately.
- the lock-up sleeve is utilized by an operation of pushing down the positioning sleeve simply by rotating the lock-up sleeve to the longitudinal groove portion of the L-shaped guide groove and applying flushing air. Can be pushed out of the junction box in an instant. Therefore, it is possible to easily take out the positioning member, the armature and the connecting member together with the lock-up sleeve outside the junction box and disassemble them for each part to perform maintenance easily. In addition, after maintenance of the parts, the parts are assembled into the lock-up sleeves again, and then the lock-up sleeves are inserted into the junction box by simply inserting the lock-up sleeves into the internal space of the junction box It is fixed.
- FIG. 1 is an exploded perspective view showing an embodiment in which a liquid discharge device according to the present invention is applied to a syringe. It is a perspective view which shows the discharge apparatus of the liquid of FIG. 1 of an assembly state. It is a front view of FIG. It is a center longitudinal cross-sectional view of the discharge apparatus of the liquid in the assembled state concerning this invention.
- FIG. 5 is an enlarged central longitudinal cross-sectional view of the junction box portion of FIG. 4; It is a center longitudinal cross-sectional view which expands and shows the relationship between the solenoid of FIG. 4, an armature, and a connection member. It is a center longitudinal cross-sectional view which expands and shows the relationship between the connection member of FIG. 4, an adapter, and a positioning member.
- FIG. 5 is a central longitudinal cross-sectional view showing an enlarged relationship between the valve seat assembly of FIG. 4 and a nozzle base of the valve body. It is a center longitudinal cross-sectional view which expands and shows the relationship between a connection member, an extension rod, and an adapter from a side. It is a center longitudinal cross-sectional view which expands and shows the relationship between a connection member, an extension rod, and an adapter from a front side. It is a disassembled perspective view which shows the relationship between a valve body and a bracket. It is a center longitudinal cross-sectional view which shows the relationship between a syringe, a needle, and an adapter.
- FIG. 10 is a central longitudinal cross-sectional view showing another embodiment of the liquid discharge device according to the present invention, showing a junction box portion together with a portion of the extension rod.
- the vertical direction refers to the longitudinal direction of the valve body (direction of movement of the needle for opening and closing the valve: axial direction), and the upper side is the junction box side of the valve body, The lower side indicates the nozzle base side.
- the front-rear direction is a depth direction orthogonal to the longitudinal direction of the valve body, the back indicates the back side of the valve body, and the front indicates the near side on which the syringe is inserted and removed.
- the lateral direction refers to the width direction orthogonal to the longitudinal direction and the longitudinal direction of the valve body, and is referred to as raising or lowering or raising or lowering when moving in the longitudinal direction regardless of the actual direction of the valve body.
- the discharge apparatus of the liquid substance concerning this invention generally called a valve discharges a liquid substance downward generally, depending on the shape of a to-be-coated-article, the attachment angle of a valve main body is changed and it faces diagonally downward. May be discharged. However, in the present specification, the case of discharging downward is mainly described.
- the liquid material discharge apparatus (generally referred to as a valve) according to the present invention is, as shown in FIG. 1 or FIG. 14, a valve seat assembly 3 mounted on the tip of the syringe 1 or functional cartridge 2, and the syringe 1 or function.
- valve body 4 inserted into the interior of the flexible cartridge 2 and in contact with the valve seat 46 of the valve seat assembly 3 at the tip, and the syringe 1 or functional cartridge 2 while detachably holding the syringe 1 or functional cartridge 2 2 at least a valve main body 6 incorporating an actuator 5 magnetically coupled to the magnetic sensor 2 to move the needle 4 toward and away from the valve seat, and the syringe 1 or the needle 4 and the valve seat assembly 3 attached in advance Functional cartridge 2 with valve body
- the actuator 5 of the valve main body 6 and the needle 4 mounted in the syringe 1 or the functional cartridge 2 are magnetically coupled and integrated by simply setting them in the liquid substance in the syringe 1 or the functional cartridge 2.
- the discharge of the liquid material to be supplied is controlled by the actuator 5.
- the needle 4 may be driven directly by the actuator 5 incorporated in the valve main body 6, or may be driven indirectly via a member driven by the actuator 5. . Therefore, in the present embodiment, a solenoid having excellent responsiveness is adopted as the actuator 5 (hereinafter, also referred to as an actuator and also referred to as a solenoid 5), and the armature 7 and the connecting member 8 are driven by the actuator 5 (hereinafter, An example, which is built in the valve main body 6 as a member to be driven side generically and is provided to transmit the movement of the armature 7 attracted by exciting the solenoid to the needle 4 through the connecting member 8 I will list and explain mainly.
- the valve main body 6 is a box-like frame that accommodates a mechanism unit for connecting and driving the syringe 1 or the functional cartridge 2, and means for supplying power to the mechanism unit.
- Main frame 9 also referred to as a junction box in this specification
- Main frame 9 that functions as a junction box for connecting power cable 124 and air hose 125 for applying air pressure
- nozzle base 10 for receiving and holding valve seat assembly 3
- the junction box 9 further includes a solenoid 5 as an actuator, an armature 7 as a driven member driven in the vertical direction by the solenoid 5 and a connecting member 8 and a vertical movement by applying air pressure to the syringe 1 or the functional cartridge 2.
- the syringe 1 or the functional cartridge 2 is provided with a positioning member 14 fitted to the side adapter 12 or the extension rod 13 and coupled by magnetic coupling with a needle 4 incorporated in the syringe 1 or the functional cartridge 2.
- the valve body 6 is provided so as to be removable with the needle 4 inserted.
- the connecting member 8 which is a part of the driven side member and the needle 4 are provided as separate structures, and the magnet 15 is used for the required coupling between the two, thereby enabling strong fastening of the both. For this reason, since the alignment between the connecting member 8 that moves up and down integrally with the armature 7 and the needle 4 is performed automatically by the magnetic coupling while the syringe 1 or the functional cartridge 2 is set in the platform 11 at the same time. It has a structure that does not require subtle readjustment that occurs when replacing the syringe.
- a magnet 15 is used as a means for magnetically coupling the needle 4 and a part of the actuator 5 or the connection member 8 which is a member driven by the actuator 5, and a part or connection member of the actuator 5 in the valve main body 6 It is equipped with at least one of the eight side and the needle 4 side, or preferably both.
- the connecting member 8 is connected to the hook 16 which engages only when the armature 7 is magnetically attracted to the solenoid 5 and ascends, and the connection of the head of the needle 4
- the hook 16 is disposed so as to penetrate the hole 20 provided at the center of the armature 7, and the radially outward flange 23 engaged with the flange 22 protruding radially inward from the bottom of the hole 20 is And is interlocked only with the armature 7 which is raised by the engagement of the flange 22 on the armature 7 side and the flange 23 on the upper side. That is, since the hooks 16 are in a relationship of moving the flanges 22 and 23 in the direction of separating from each other with respect to the armature 7 to be lowered, the hooks 16 are not interlocked and the urging means 24 for pushing the needle 4 back to the fixed position. Forced down by force.
- An annular groove 26 is formed on the outer peripheral surface of the intermediate connector 18, and an O-ring 25 is accommodated, and the yoke 17, the intermediate connector 18 and the hook 16 have the same outer diameter, and the center of the positioning member 14 is It is provided to penetrate the hole 28.
- an axial gap is formed between the surfaces where the two flanges 22 and 23 oppose each other.
- the armature 7 can start to move and receive suction accompanying the excitation without receiving a strong biasing force of the biasing unit 24 that tries to push the needle 4 back to the fixed position at the initial stage of the excitation, for example, a spring load.
- the time during which the solenoid 5 is actually excited is longer than the lifting time (valve injection time) of the needle 4 that is originally required, and the suction force of the solenoid is enhanced. Therefore, the needle can be reliably driven even with a short discharge time, and it is possible to discharge a smaller amount of liquid material.
- the armature 7 and the hook 16 are not interlocked from beginning to end, and at the beginning of the movement of the armature 7 from the standby position, there is provided an approach section where only the armature 7 moves without moving the needle 4.
- the armature 7 By adding a constant run-up time of only the armature 7 to bulk up the time for driving the solenoid 5, the armature 7 is easily attracted even with a short discharge time.
- the armature 7 can be reliably driven, and a shorter discharge time can be obtained.
- the excitation time of the solenoid 5 becomes shorter, the attraction force becomes weaker, and there is a problem that the armature 7 can not be attracted.
- the standby position refers to a position where the armature 7 is mounted on the upper end surface of the lock-up sleeve 30.
- the technique of separating the armature 7 and the connecting member 8 from each other and providing the axial gap 29 between them and providing the run-in section in which only the armature 7 moves in the initial stage of driving is a valve using a solenoid as an actuator, for example It is needless to say that the invention can be applied to the valve described in Japanese Patent Application Laid-Open No. 2001-157862.
- the armature 7 and the hook 16 are separated and the axial gap 29 is set between them, so that the force of the urging means 24 for pushing the needle 4 back to the fixed position via the pusher 31 is the needle 4.
- the armature 7 side is configured not to receive the force of the urging means 24 that pushes the needle 4 back to the fixed position. Therefore, it is possible to reduce the suction delay due to the influence of the force (spring load) of the biasing means 24 at the initial stage of the excitation of the solenoid 5.
- a resin block 27 for preventing wear due to metal collision is installed, and an axial gap 29 is provided. There is.
- the hook 16 itself is molded of resin, it is not necessary to arrange the resin block 27 for buffer.
- the armature 7 as the driven side member driven by the actuator 5 and the connecting member 8 are separate structures that can be separated.
- the armature 7 and the connecting member 8 and May be integrally formed or integrated by screws or welding.
- a boss 121 having projections and recesses fitted with projections and depressions of the end face of the intermediate connector 18 and screw holes is integrally formed with the armature 7 on the back surface side of the discoid armature 7 It may be integrated by connecting the intermediate connector 18 and the yoke 17 containing the magnet 15 with the screw shaft 19.
- the suction force of the solenoid 5 is so strong that the entry space for the armature 7 is not required, the relationship between the application of the solenoid 5 and the operation of the armature 7 is almost delayed even if there is no entry zone with the armature 7 alone. Since the driving can be performed directly, it is possible to realize a discharge device capable of discharging in a high cycle. That is, although the armature 7 and the connecting member 8 do not necessarily have to be separated from each other, they need to be separated with respect to the needle 4.
- the hook 16, the intermediate connector 18 and the yoke 17 constituting the connecting member 8 may be basically an integral structure
- the intermediate connector is used to interrupt the magnetism between the armature 7 and the magnet 15.
- No. 18 a separate structure is adopted to enable the use of non-ferrous metals or engineering plastics.
- the magnet 15 is surrounded by the yoke 17 in the present embodiment, the magnet 15 is not necessarily necessarily the yoke 17, and is configured to be held on the hook 16 side while protecting the magnet 15 which is fragile and weak to impact. Is preferred.
- the tip end of the yoke 17 in contact with the connect sleeve 21 may be made of a resin sleeve 122. In this case, the wear between the upper end surface 49 of the connect sleeve 21 made of metal and the yoke 17 can be eliminated.
- the structure in which the magnet 15 is surrounded by the yoke 17 is preferable because the upper surface of the hook 16 has no polarity with respect to suction from the solenoid 5.
- Junction box 9 has a downwardly opening circular internal space 106 for accommodating the mechanism, and an upwardly open recess for assembling the valve stroke adjustment mechanism, and is an internal space 106 for accommodating the mechanism.
- the four air flow paths 114a to 114d are opened in the inner peripheral wall surface that defines the inner space 106, and the internal space 106 and the recess are communicated with each other by a through hole opened at the center of the partition wall separating them. Therefore, as shown in FIG. 5, the housed solenoid 5 is airtightly fixed to the junction box 9 at the same time by the O-ring 109 fitted on the outer peripheral surface of the housing 33 and fixed.
- the coil 35 wound around the bobbin 34 is covered with the housing 33, the coil core 36 is fitted so as to penetrate the central hole of the bobbin 34, and the bottom opening of the housing 33 is closed by the insulating plate 37. It is fixed to the internal space 106 of the junction box 9.
- a lockup sleeve 30 in which O-rings 115 and 116 are fitted on the outer peripheral surface is accommodated in the internal space 106 of the junction box 9, and the positioning member 14 is supported by the lockup sleeve 30 so as to be able to retract.
- the armature 7 is accommodated in a space 38 between the solenoid 5 and the piston portion 63 of the positioning member 14 surrounded by the lock-up sleeve 30 and is attracted to the solenoid 5 by excitation by the solenoid 5. It is provided to be movable in the direction.
- the positioning member 14 need not be accommodated in the internal space 106 of the junction box 9 after being accommodated in the lock-up sleeve 30 which also serves as a cylinder, and in some cases the internal space of the junction box 9 may not be used. After being stored directly in 106, it may be supported so as to be able to emerge and retract by covering it with an annular seat plate or the like.
- the lockup sleeve 30 is provided detachably to the junction box 9. Specifically, as shown in FIG. 6, for example, the lock-up sleeve 30 is provided on an inner circumferential wall that causes the dowel 39 to protrude to the circumferential surface thereof and defines an internal space 106 that accommodates the mechanical portion of the junction box 9. It is integrated with the junction box 9 by inserting it into the dowel holes 40.
- the dowel 39 is a dowel at the back end of the junction box 9 via an L-shaped groove 40g comprising a longitudinal groove extending in the axial direction from the edge of the lower end opening formed in the inner peripheral wall of the junction box 9 and a circumferential lateral groove. The hole 40 is inserted.
- three dowels 39 are provided at equal intervals in the circumferential direction of the lock-up sleeve 30, and are introduced from three L-shaped grooves 40g formed on the inner peripheral surface of the junction box 9 It is inserted into three dowel holes 40 arranged at intervals. Therefore, if the lockup sleeve 30 is reversely rotated and the dowel 39 is removed from the dowel hole 40 and circumferentially moved to the longitudinal groove portion (the opposite end of the lateral groove) 40gv of the L-shaped groove 40g, the lockup sleeve 30 is It can be removed from the junction box 9 by axial movement.
- a ball plunger 41 is provided on the circumferential surface of the lock-up sleeve 30 and fitted in a recess opened on the inner circumferential surface of the junction box 9 to position and fix the junction box 9.
- the outer peripheral surface of the lock-up sleeve 30 and the inner peripheral surface of the junction box 9 are sealed by O-rings 115 and 116 fitted to the outer peripheral surface of the lock-up sleeve 30. Therefore, the working gas supplied to the space 38 above the piston portion 63 of the positioning member 14 and the space 117 below does not leak from between the lockup sleeve 30 and the junction box 9.
- a magnet 42 for attracting the armature 7 is disposed on the surface of the lock-up sleeve 30 facing the solenoid 5 and provided to return the armature 7 to the standby position by attracting it with not only its own weight but also the magnetic force.
- the magnets 42 installed at three points at equal intervals in the circumferential direction have a much weaker magnetic force than the attraction force of the solenoid 5 and do not serve as a resistance against attraction of the armature 7 upward by the solenoid 5. is there.
- the armature 7 may be returned to the standby position by dropping it only with its own weight, but since there is a limit to the drop speed (moving speed), the armature 7 can be turned ON / OFF with quick response.
- the magnet 42 for forcibly returning the armature 7 to the standby position, since the return to the home position or the fall may be delayed.
- the means for returning the armature 7 to the standby position is not particularly limited to the magnet 42.
- a compression spring or the like always biases the solenoid 5 toward the lockup sleeve 30.
- the adsorption by the magnet 42 is preferable because it is possible to prevent dust and the like from the joint portion of the spring and the armature 7 which may occur in the case of space saving and spring installation.
- the junction box 9 further includes a valve stroke adjusting mechanism 50 for adjusting the stroke of the needle 4 and an urging mechanism 24 for always applying an urging force for pushing the needle 4 back to a fixed position, independently of each other. It is possible to adjust the stroke under the application of the spring load, and to avoid receiving a strong load at the initial stage of excitation at the time of small amount discharge.
- the armature 7 and the connecting member 8 have a separate structure, and the tip of the stroke adjusting rod 32 abuts only on the hook 16 of the connecting member 8 so that the rising end of the needle 4 can be restricted.
- a spring accommodating space is formed around the stroke adjusting rod 32 by the coil core 36 and the upper core 43 mutually connected by screws, and the sleeve-like pusher 31 pressed against the hook 16 and the pusher 31
- a spring as a biasing mechanism 24 is disposed which biases the push-down needle 4 back to the fixed position toward the hook 16.
- a spring plug 45 is disposed above the spring 24 via a resin collar 44 so as to give the spring 24 a desired deformation and displacement.
- the stroke adjusting rod 32 and the spring 24 which pushes the needle 4 back to the fixed position act on the hooks 16 of the connecting member 8 independently of each other.
- the stroke adjustment by the rod 32 and the fluctuation of the load of the return coil spring 24 can be separated.
- one continuous space / spring accommodation space is divided by the coil core 36 and the upper core 43, but in some cases it may be formed by a single coil core, and the solenoid component is It may be made up of unrelated cylindrical parts.
- the central through hole of the partition dividing the valve stroke adjusting mechanism 50 from the inner space 106 side mainly including the mechanical portion such as the solenoid 5 is penetrated.
- a spring plug 45 is provided on a screw at the upper portion of the upper core 43 that protrudes to the left, and turning the spring plug 45 makes it possible to change the length of the space that accommodates the spring 24 that pushes the needle 4 back into place. It is adjustable. As a result, even if the spring 24 itself is not replaced with one for low load or high load, the spring load can be adjusted steplessly simply by turning the plug 45. When the spring load is constant, the viscosity of the liquid may scatter depending on the viscosity of the liquid.
- the urging means 24 for pushing the needle 4 back to the fixed position is not limited to the spring as in the present embodiment, but may be a magnet (not shown) in some cases.
- the ring-shaped magnets may be disposed so as to repel each other, and the pusher 31 may be urged against the hook 16 by the repulsive force of the magnets. It is preferable to push the needle 4 back to the fixed position by the magnet because this also makes it possible to prevent dusting and the like.
- the present invention is not limited to the adjustment screw method by the above-mentioned spring plug 45.
- the fixed position of the spring plug 45 is made constant and the space for housing the spring 24 is effectively changed
- the length may be changed to adjust the spring strength.
- the adjustment of the spring load can be completed simply by tightening the
- a sheath and a low friction coating agent made of a low friction coefficient low abrasion resin material such as polytetrafluoroethylene, polyacetal, or polyamide are used.
- a sheath tube coated on the inner circumferential surface is covered on the outside of the spring 24 so that the spring 24 slides relative to the sheath tube, so that dust can be prevented easily.
- the stroke adjusting rod 32 is generally mirror-finished, the outer peripheral surface side of the spring 24 is separated from the coil core 36 and the inner peripheral surface side is relatively slid along the stroke adjusting rod 32. Dust generation can be easily prevented by adjusting the winding diameter of the spring 24.
- the connect sleeve 21 made of a ferromagnetic material is crowned on the head of the impact rod 48 in order to magnetically couple with the connection member 8 of the valve main body 6, but the present invention is not limited thereto.
- the connect sleeve 21 is not particularly required. Of course, if the magnet 15 is mounted on the top of the needle 4, the material of the needle 4 is not affected.
- the top of the needle 4, that is, the upper end surface 49 of the connect sleeve 21 in contact with the magnet 15 and the yoke 17 be formed in a gentle R shape or a spherical surface.
- it is formed as a spherical surface having a radius of about L (see FIG. 12) from the portion where the inner surface of the nozzle retainer plug 83 and the outer surface of the nozzle adapter 84 contact to the needle top.
- the head top of the needle 4 that is, the upper end surface 49 of the connect sleeve 21 does not interfere with the lower end of the connecting member 8 in the fixed position, that is, the yoke 17.
- the spherical top and top end face 49 of the connect sleeve 21 facilitate relative inclination of the needle 4 with respect to the connection member 8 on the valve body 6 side, and the armature 7 and the connection member 8 with respect to the valve seat 46 It can be connected in a form that does not require coaxiality.
- the magnet 15 plays a role like a coupling, so that both are connected and at the same time the centering effect by the magnetic attraction. Alignment is performed automatically. Even if coaxiality is not secured between the connecting member 8 on the valve body 6 side and the needle, the relationship between the needle 4 and the valve seat 46 is not affected, so between the needle 4 and the valve seat 46 It is sufficient to have a structure that can ensure even coaxiality, and does not require much total coaxiality between each part. Even if there is a variation in the contact surface angle, the contact of the surface attracted by the magnet 15 is eliminated.
- the magnetic attraction force suspends the magnet 15 of the connecting member 8 interlocked with the solenoid 5 so that the self-holding can be performed. For this reason, after the syringe is mounted at a predetermined position, the syringe can stand on its own in a state where the needle 4 is sucked by the magnet 15, and therefore the syringe 1 or the functional cartridge 2 is not inclined or tilted even if the hand is released. Further, the spherical upper end surface 49 of the connect sleeve 21 contacts the yoke 17 around the magnet 15 slightly protruding from the magnet 15 without directly contacting the relatively fragile magnet 15. As a result, the relatively fragile magnet 15 is protected and the magnetic attraction force acts strongly.
- the coaxiality of the needle 4 and the syringe 1 or the functional cartridge 2 is maintained by the valve seat 46 and the universal adapter 12 or the valve seat 46 and the extension rod 13 at both ends of the syringe 1 or the functional cartridge 2.
- the solenoid 5 on the valve body 6 side is fastened by the magnet 15, the degree of freedom of the angle is high, and a structure which is not influenced by the eccentricity with the valve body 6 can be obtained. That is, even when misalignment occurs between the connection member 8 on the valve body 6 side and the needle 4, it is possible to maintain the coaxiality of the needle 4 and the valve seat 46.
- the valve stroke adjustment mechanism 50 is provided with a torque limiter.
- the torque limiter according to the present embodiment, as shown in FIG. 5, includes a ball plunger 55 held by a torque limiter housing 51 rotatably provided relative to a microadjustment cap 53 via a thrust bearing 52, and a microadjustment.
- the ball of the ball plunger 55 on the torque limiter housing 51 side is fitted to the recess or hole 56 on the torque limiter holder 54 side, which is constituted by the recess or the hole 56 provided on the torque limiter holder 54 integrated with the mentment cap 53. It is trying to apply a certain load.
- the micro adjustment cap 53, the torque limiter housing 51, and the torque limiter holder 54 are made of aluminum for weight reduction.
- a stainless steel set screw 57 in contact with the head of the stroke adjustment rod 32 is screwed into the torque limiter housing 51, and the stroke end of the needle 4 is received by receiving the top of the stroke adjustment rod 32.
- the stroke adjusting rod 32 is fixed to the torque limiter housing 51 by a fixing means such as a set screw or press fitting, so that the stroke adjusting rod 32 and the torque limiter housing 51 It may be integrated. In this case, even if the microadjustment cap 53 is removed without removing the pressure applied to the syringe 1 or the like, there is no risk that only the stroke adjusting rod 32 will fly out.
- the operation for obtaining the zero point tends to rely on the operator's sense, and the zero point can not be accurately obtained.
- the valve stroke adjustment mechanism 50 with a torque limiter, the zero point can be accurately determined by causing the micro adjustment cap 53 to idle when torque equal to or greater than the set value is applied. Therefore, the desired adjustment stroke of the needle 4 can be accurately made by turning the micro adjustment cap 53 back by a desired amount with reference to the scale 58 on the outer peripheral surface based on the detected zero point and pulling up the position of the set screw 57. The amount can be set.
- the micro adjustment cap 53 is screwed into a screw on the upper portion of the upper core 43.
- the micro adjustment cap 53 when the micro adjustment cap 53 is turned, it moves up or down to adjust the position of the set screw 57, that is, the rising end of the stroke adjusting rod 32. Since the stroke adjustment rod 32 does not fall freely due to the frictional force of the O-ring disposed between it and the spring plug 45, it is held at a position where it strikes the set screw 57 by suction by the solenoid 5 of the armature 7 .
- the torque limiter holder 54 and the micro adjustment cap 53 screwed thereto are constantly pushed up by a plurality of spring plungers 59 circumferentially provided on the junction box 9 side.
- the spring plunger 59 absorbs the play of the screw portion by pushing up the micro adjustment cap 53 and applies a frictional force to the micro adjustment cap 53 to also function as a detent.
- an annular non-slip member 120 is fitted on the bottom of the cap 53, and the non-slip member 120 is interposed to press the spring plunger 59 against the torque limiter holder 54. is there. In this case, it is possible to more reliably prevent the rotation and loosening of the micro adjustment cap 53 due to the vibration generated at the time of high speed shot.
- valve stroke adjustment mechanism 50 is not limited to the valve structure of the present embodiment in which the actuator 5 side and the needle 4 side are magnetically coupled, and is raised and lowered by rotation of the stroke adjustment rod 32 using a screw feed mechanism. It is applicable to all valve structures that adjust the stroke amount of the needle.
- the zero point means that there is no gap between the stroke adjusting rod 32 and the upper surface of the hook 16 installed in the hole 20 at the center of the armature 7 with the needle 4 and the valve seat 46 closed.
- the armature 7 is pulled up by the excitation of the solenoid 5, but since the hook 16 is pressed against the lowermost surface of the stroke adjusting rod 32, it can not be pushed up.
- the valve seat 46 in contact with the tip of the needle 4 is also not opened, and discharge can not be performed even if the solenoid 5 is energized for any long time.
- the solenoid 5 When the solenoid 5 is used as an actuator, the solenoid 5 may generate heat to weaken the excitation power depending on the use condition, and as a result, the discharge amount may become unstable. Therefore, the temperature rise of the solenoid 5 is cooled by a cooling fluid such as air, water, liquid nitrogen or the like to maintain a constant excitation power. At this time, a temperature sensor (not shown) may be provided nearby to correspond to the temperature change of the solenoid 5, and the air blowing amount may be adjusted using electro-pneumatic conversion to keep the temperature of the solenoid 5 constant.
- a cooling fluid such as air, water, liquid nitrogen or the like
- the space between the solenoid 5 and the junction box 9 enclosing the coil housing 33 is provided with a cooling air inlet / outlet communicating with the air flow paths 114a and 114b so that compressed air is simply flowed around the coil housing 33.
- a system that cools the solenoid 5 is used.
- the positioning member 14 has a connecting portion 60 having a shape adapted to the end shape of the syringe 1 or the functional cartridge 2 to be attached to the lower portion thereof.
- the end shape of the syringe 1 or the functional cartridge 2 is the syringe 1 or the functional cartridge 2 when attaching the syringe 1 or the functional cartridge 2 to the valve main body 6 with the adapter 12 or the extension rod 13 interposed.
- the plug 61 of the adapter 12 or the plug 62 of the extension rod 13 which is a part of the functional cartridge 2 means the end of the syringe 1 or the functional cartridge 2 when attaching the syringe 1 or the functional cartridge 2 directly to the connecting portion 60. It is meant.
- the positioning member 14 enables centering out and connection of the syringe 1 or the functional cartridge 2 by fitting the connector 61 of the adapter 12 on the syringe 1 or the functional cartridge 2 side or the plugs 61 and 62 of the extension rod 13 with the connecting portion 60. Together with the junction box 9, the lockup sleeve 30 and the adapter 12 on the syringe 1 or the functional cartridge 2 side or the plug 61, 62 of the extension rod 13 to form a seal, and working gas such as compressed air or the like.
- the pressure is lowered toward the syringe 1 or the functional cartridge 2 by the pressure of an inert gas such as nitrogen gas (hereinafter simply referred to as compressed air) to be coaxially accommodated.
- the positioning member 14 is pushed up to the upper limit of its movable range, so that the connecting portion 60 at the lower end is disengaged from the plug 61 of the universal adapter 12 or the plug 62 of the extension rod 13, and the armature 7 is further pushed up.
- the connecting member 8 In order to push up the connecting member 8 until it abuts against 32, it serves to create a gap between the yoke 17 and the universal adapter 12 or the extension rod 13. That is, the positioning member 14 of the present embodiment moves the syringe 1 or the functional cartridge 2 forward and backward to move the syringe 1 or the functional cartridge 2 to the valve body 6, and the syringe 1 or the functional cartridge 2.
- the positioning member 14 of the present embodiment has a piston portion 63, a piston rod portion 64, and a cylindrical connection portion 60 (hereinafter also referred to as a connection port 60), and a hole for passing the connection member 8 in the center thereof. It has 28.
- An opening 28 a on the upper side of the hole 28 is a recess that accommodates a flange 22 that protrudes to the center of the lower surface of the armature 7.
- compressed air is generally used as the working gas, an inert gas such as nitrogen may be used as needed to prevent deterioration of the discharged solvent.
- an O-ring is disposed between the positioning member 14 and the connection member 8 and the universal adapter 12 or the plugs 61 and 62 of the extension rod 13 so as to have the following relationship.
- the O-rings 67 and 68 of the peripheral surfaces of the plugs 61 and 62 make contact with the inner circumferential surface of the connection port 60 and further constitute the seal necessary to push the positioning member 14 downward.
- the O-ring 25 around the intermediate connector 18 is disengaged from the central hole 28 of the positioning member 14 so that the upper space of the cylinder portion of the lockup sleeve 30
- the compressed air passes through the gap between the hole 28 penetrating to the center of the positioning member 14 and the yoke 17 It is provided to flow into the cartridge 2.
- connection port 60 at the lower end of the positioning member 14 is provided so as to be detached from the plug 61 of the universal adapter 12 or the plug 62 of the extension rod 13 after blocking the passage / hole 28 communicating the upper space 38 with the inside of the syringe. .
- the positioning member 14 is pushed back slightly by the force of the spring 24 via the pusher 31, but the armature on the uppermost step end face of the lockup sleeve 30 Since the lower surface of 7 hits and the armature 7 is restrained at that position, the positioning member 14 is resisted by the three O-rings 25, 65, 66, so that falling and falling due to their own weight are prevented.
- the platform 11 of this embodiment has a U-shaped cross section covering the three sides of the left and right sides and the back except for the front side where the syringe 1 or the functional cartridge 2 is taken in and out.
- the rigidity is high as a whole, and even if flushing air is applied, the platform 11 does not expand in the axial and longitudinal directions (between the junction box 9 and the nozzle base 10 receiving the valve seat assembly 3).
- the position where the adhesive is to be applied and the aiming position do not go out of place.
- the flange portion 70 of the universal adapter 12 which is the largest diameter portion on the syringe 1 side between the left and right side walls 69 of the platform 11, the flange portion 70 is held from both left and right sides.
- the dimensional relationship between the diameter or at least the width of the flange portion 70 of the universal adapter 12 and the width between the left and right side walls 69 of the platform 11 is empty only with a slight gap that does not affect the loading of the syringe 1.
- the largest diameter portion on the syringe side or on the functional cartridge side means a portion projecting in the most lateral width direction of the syringe 1 or the functional cartridge 2, and the flange portion 70 of the universal adapter 12 described above.
- an adapter adapted to each form and size of the syringe 1 or the functional cartridge 2 is prepared, it is the largest diameter portion of each adapter, and the adapter 12 and the extension rod 13 are interposed. If not, it means the maximum width of the syringe 1 itself or the functional cartridge 2 itself.
- adoption of the platform 11 having a U-shaped cross section surrounding three sides of the syringe 1 provides rigidity of the valve main body 6, in particular, effective rigidity in suppressing axial displacement and deformation, and the valve main body 6 of the syringe.
- it is preferable in order to assist the positioning at the time of attachment to the connector it is not necessarily limited to this, and as in the frame structure described in Patent Document 1, even as a structure in which the junction box 9 and the nozzle base 10 are connected by a tie lot good.
- the second shoulder 71 on the flange 70 of the universal adapter 12 and the positioning shoulder 80 adjacent to the plug 62 at the upper end of the extension rod 13 are lock-up sleeves projecting downward from the bottom of the junction box 9 By abutting against the inner peripheral surface of the back side of the semicircular guide portion 81 at the lower end of the lower end 30, position control to the depth side is performed. That is, the size of the positioning shoulder 80 of the extension rod 13 is set to the same size as the second shoulder 71 of the universal adapter 12.
- the syringe 1 fitted with the universal adapter 12 is inserted into the platform 11 of the valve main body 6 and pressed until the second shoulder 71 abuts the inner peripheral surface on the back side of the guide 81, or the extension rod 13
- the platform 11 is roughly aligned with the positioning member 14 to the left, right, and back.
- the plug 62 at the upper end of the extension rod 13 connected to the third plug portion 61 of the universal adapter 12 or the universal adapter 12 is fitted into the lower connection port 60, and the valve Alignment and connection of the body 6 side and the syringe 1 side are simultaneously completed.
- the second shoulder 71 of the adapter 12 and the positioning shoulder 80 of the extension rod 13 have the same shape and dimensions, the syringe 1 and the functional cartridge 2 of different sizes and shapes can be attached. Also, constant positioning is possible.
- the nozzle base 10 for receiving and holding the valve seat assembly 3 at the lower part of the valve body 6 is connected to the junction box 9 by the platform 11 and coaxially arranged with the positioning member 14 of the junction box 9 as shown in FIG.
- the nozzle receiver 82 and the nozzle retainer plug 83 are held, and a syringe accommodating space 93 for accommodating the syringe 1 or the functional cartridge 2 is partitioned between the junction box 9 and the nozzle receiver 82.
- the valve seat assembly 3 of the present embodiment comprises a seat holder 85 having a screw on the outer peripheral surface, a nozzle retainer 86, a valve seat 46, a nozzle 87 and a nozzle adapter 84.
- valve seat assembly 3 is provided so that the tapered surface or the spherical surface of the outer surface of the nozzle adapter 84 can be positioned at a fixed position by contacting the tapered surface or the inner surface of the spherical surface of the nozzle retainer plug 83 on the nozzle base 10 side. There is.
- valve seat assembly 3 may be of a luer through type, and at least one that functions as the valve seat 46 can be attached to the tip of the syringe 1 or the functional cartridge 2 If it is a thing, it does not need all the above-mentioned parts.
- a ball 88 preferably a ceramic ball, is disposed between the nozzle base 10 and the nozzle receiver 82 to provide a heat insulating effect as a point contact between the heater 89 and the valve body 6 (nozzle base 10). It is taking. Further, a gap 90 is set between the nozzle receiver 82 and the syringe 1 or the functional cartridge 2 so that the heat of the heater 89 incorporated in the nozzle receiver 82 is less likely to be transferred from the peripheral wall of the syringe 1 or the functional cartridge 2 It is provided as.
- the heat of the heater 89 is hard to be transmitted from the nozzle base 10 to the platform 11 and the junction box 9 side, and usually, from the nozzle receiver 82 incorporating the cartridge heater 89 and the temperature sensor 91 to the nozzle retainer plug 83 and the nozzle adapter 84.
- the heat is transmitted to the valve seat assembly 3 at the tip of the syringe 1 or the functional cartridge 2.
- Control of the temperature of the liquid in the syringe 1 or the functional cartridge 2 is necessary to stabilize the viscosity of the liquid, but heating the entire syringe 1 or functional cartridge 2 causes heat damage to the liquid. May give.
- the nozzle 87 at the tip of the syringe 1 or the functional cartridge 2 is concentrated and heated.
- a cylindrical heat transfer tube 92 made of a material having excellent thermal conductivity may be fitted into the syringe 1 or the functional cartridge 2 so as to fill the gap 90 between the nozzle receiver 82 and the syringe 1 or the functional cartridge 2.
- the heat of the heater 89 is transferred to the syringe 1 or the functional cartridge 2 in the range surrounded by the heat transfer pipe 92 through the heat transfer pipe 92, so that the wide area of the syringe 1 or the functional cartridge 2 can be easily adjusted in temperature. .
- valve seat assembly 3 when the valve seat assembly 3 is attached to the syringe 1 or the functional cartridge 2, if the tightening of the valve seat assembly 3 to the syringe 1 or the functional cartridge 2 is sweet, the fluid leaks from the fitting portion and the fluid is actually discharged. Risk of spilled products. Therefore, in the present embodiment, when the valve seat assembly 3 is not completely attached to the tip of the syringe 1 or the functional cartridge 2, the syringe 1 or the functional cartridge 2 is configured not to receive the attachment to the valve main body 6. It makes it easy to manage the mounting condition of the parts attached to the. That is, as shown in FIG.
- the valve according to the present embodiment is the entire length of the syringe 1 or the functional cartridge 2 with the valve seat assembly 3 and the needle 4 and optionally the universal adapter 12 or the extension rod 13 attached. (Length from the portion where the inner surface of the nozzle retainer plug 83 contacts the outer surface of the nozzle adapter 84 to the top of the needle head) L is longer than the axial effective length of the syringe housing space 93 of the valve body 6
- the syringe 1 or the functional cartridge 2 in which the valve seat assembly 3 and the universal adapter 12 are assembled can not enter the space below the positioning member 14, ie, the syringe accommodation space 93.
- the axial effective length of the syringe accommodation space 93 refers to the connection port of the positioning member 14 in a state where it is pushed up from the position (home position) of the nozzle retainer plug 83 against which the valve seat assembly 3 is pressed.
- the distance to the lower end of 60 say the length.
- the positioning member 14 and the universal adapter 12 collide.
- the syringe 1 or the functional cartridge 2 can not be loaded.
- the lower end portion of the yoke 17 connected to the hook 16 pressed to the tip of the stroke adjustment rod 32 may receive the syringe, for example,
- the axial effective length in the space 93 may be less than or equal to a specified value.
- the micro adjustment cap 53 can be reversed and the rod 32 can be withdrawn.
- the connection between the syringe 1 or functional cartridge 2 charged in the syringe accommodation space 93 and the junction box 9 of the valve main body 6 is the adapter 12 or the adapter 12 fitted on the syringe 1 or functional cartridge 2 side. This is performed by fitting the extension rod 13 to the connection port 60 of the positioning member 14.
- the shape of the end of the adapter 12 or extension rod 13 to be fitted to the connection port 60 is standardized, and the other end is made to correspond to the syringe 1 or functional cartridge 2 or adapter 12 to be connected. By doing this, it becomes possible to attach to any syringe 1 or functional cartridge 2 with one touch as long as the size fits in the syringe accommodation space 93.
- the end portions of the syringe 1 or the functional cartridge 2 corresponding to this may be made to be compatible with each other by making the shapes or shapes compatible with each other.
- the adapter 12 may be prepared for each size of the syringe 1 or the shape and size of the functional cartridge 2 respectively, in the case of this embodiment, the highest flowability among the syringes distributed in the market is the highest. For example, by using one universal adapter 12 adaptable to four types of syringes of 55 cc, 30 cc, 10 cc and 5 cc, mounting of all the syringes is enabled. Of course, it may be made to correspond to the functional cartridge 2. As shown in FIGS.
- the universal adapter 12 includes a flange portion 70 that abuts the opening edges of the 55 cc and 30 cc syringes 1 and a 55 cc and 30 cc syringe adjacent to the lower side of the flange portion 70.
- the inlet portion of the hole 75 is a screw hole.
- the opposite 5 cc third plug portion 61 exposed to the outside of the syringe 1 is a cylindrical portion for fitting at the lower end of the positioning member 14.
- the connection port 60 is used as a connection means to be fitted. That is, the inner diameter of the connection port 60 is formed to the same diameter as the inner diameter of the 5 cc syringe. Further, the diameter of the second plug portion 73 for 10 cc is also formed to be the same as the inner diameter of the connection port 60.
- the universal adapter 12 is engaged with the connection port 60 at the lower end of the positioning member 14 regardless of whether the third plug portion 61 for 5 cc or the second plug portion 73 for 10 cc on the opposite side is used.
- the extension rod 13 is fitted and coupled with the connection port 60 at the lower end of the positioning member 14 through the extension rod 13.
- Grooves 77, 78, 79 for attaching O-rings 67, 76 are respectively provided in the first to third plug portions 61, 72, 73, and the O-rings according to the inner diameter size of the corresponding syringe Is used as a sealable structure by being attached.
- the dimension relationship is set such that only a slight gap that does not hinder the charging of the syringe is made between the flange portion 70 of the universal adapter 12 and the left and right side walls 69 of the platform 11. Therefore, when the syringe 1 is to be attached to the valve body 6, tilting of the syringe 1 to the left and right can be regulated by the platform 11 of the valve body 6.
- the second shoulder portion 71 or the second plug portion 73 on the flange portion 70 is positioned by abutting against the inner peripheral surface on the back side of the guide portion 81 at the lower end of the lockup sleeve 30. . That is, the second shoulder 71 or the second plug portion 73 is not only positioned for fitting to a 5 cc syringe, but also for positioning on the depth side when the syringe 1 is attached to the valve main body 6 It is used as a proof.
- a second shoulder 71 is provided on the side of the universal adapter 12 or the second plug 73 is used on the inner peripheral surface of the lower end of the guide portion 81 of the lock-up sleeve 30.
- Abutment is made to function as a certificate for positioning on the depth side, but it is not particularly limited to this, and in some cases, a semicircular protrusion protruding toward the universal adapter 12 on the lockup sleeve 30 side (Not shown) to function as a mark for positioning of the third plug 61. In this case, it is necessary to provide a corresponding recess on the second plug portion 73 side. Further, it is also possible to adopt a structure in which a part of the syringe 1 or the functional cartridge 2 directly contacts some positioning means on the valve main body 6 side to position the depth side. Furthermore, it is not necessary to provide the guide portion 81 integrally with the lockup sleeve 30 or to have a semicircular shape.
- the guide portion 81 integrally with, for example, the junction box 9.
- the outer shape of the adapter 12 or the extension rod 13 needs to be enlarged, which is not functional.
- the semicircular guide portion 81 is provided integrally with the lock-up sleeve 30 so as to protrude from the junction box, the outer shape of the adapter 12 or the extension rod 13 can be minimized.
- the guide portion 81 functions as a handle when rotating the lock-up sleeve 30 in the circumferential direction to remove the lock-up sleeve 30 from the junction box 9, the lock-up sleeve 30 is manually twisted. An easy structure can be made.
- the size of the valve body 6 may be designed for each syringe size, but the largest syringe size that matches the purpose of use in order to achieve commonality of valves, for example, a 55 cc syringe in this embodiment Are designed to fit the outer diameter and length of the Therefore, when 55 cc, which is the largest syringe size, is mounted, the 55 cc plug or first plug portion 72 of the universal adapter 12 is fitted to the syringe opening, and the 5 cc plug or third projecting in the opposite side Can be attached to the valve main body 6 simply by fitting the plug portion 61 of the above into the positioning member 14, but when using 30 cc, 10 cc, 5 cc syringes smaller than the maximum usable syringe size, the valve main body Since the length 6 is shorter than the length of the syringe assumed, it is preferable to adjust the length of the syringe using the extension rod 13 to enable the fixation of the syringe 1.
- Each extension rod 13 for three syringes of 30 cc, 10 cc and 5 cc, as shown in FIGS. 9 and 10, has a plug 94 and an O-ring 110 fitted at the lower end of the universal adapter 12 at the lower end respectively.
- a plug 62 and an O-ring 68 which can be fitted to the connection port 60 at the lower end of the positioning member 14.
- the hole 95 through which the needle 4 at the center of each extension rod 13 passes is provided such that a space where the connect sleeve 21 can move is formed in the vicinity of the upper opening end.
- the length of each extension rod 13 differs depending on the type of the corresponding syringe, but the sizes of the other structures, for example, the plug portions at both ends and the hole 95 for passing the central needle 4 are the same.
- the third plug portion 61 of the adapter 12 fitted with the connection port 60 at the lower end of the positioning member 14, the plug 62 of the extension rod 13 and the top of the functional cartridge 2 when directly connected to the connection port 60 are Similar to the upper end surface 49 of the connect sleeve 21, it is preferable to form a gentle R shape, that is, a spherical surface.
- a gentle R shape that is, a spherical surface.
- it is formed as a spherical surface having a radius of about L (see FIG. 12) from the portion where the inner surface of the nozzle retainer plug 83 and the outer surface of the nozzle adapter 84 contact to the needle top.
- each of the crowns of the third plug portion 61 etc. is preferably formed in a gentle R shape or a spherical surface, but this is not an essential condition. .
- the third plug 61 of the adapter 12 when positioning is attempted by bringing the end of the connection port 60 and the second shoulder 71 of the adapter 12 into contact with each other, the third plug 61 of the adapter 12, the plug 62 of the extension rod 13 and the function
- the lower end of the connecting member 8 and the lower end of the positioning member 14 are connected at the time of mounting the valve body 6 of the syringe 1 or the like into the syringe accommodation space 93 by reducing the height to the top of the head It is also possible not to interfere with the port 60.
- the valve (liquid discharge apparatus) according to the present invention is often mounted and used in an automatic machine such as a robot.
- the Z-axis operation amount is set by mistake in teaching
- the Z-axis (vertical axis) operation of the robot is performed on the other side member for discharging / applying the liquid in the valve body 6.
- the back side of the platform 11 is provided with a bracket 95 for attaching the valve body 6 to an automatic machine (robot), a wall or the like.
- the bracket 95 is provided with ball plungers 96 at the four corners of the surface facing the valve body 6 and is provided with hooks 97 covered with an insulating sleeve at approximately the center while maintaining a distance from the valve body 6. There is.
- a large hole and a small long hole are connected to form one hole, and a slated hole 98 is provided, and the hook 97 is inserted from the lower hole of the slack hole 98 and slid upward.
- the bracket 95 provides heat insulation and a buffer effect at the time of collision with the Z-axis (longitudinal direction and axial direction of the valve body 6) with the valve body 6.
- the ball plunger 96 plays the role of a torque limiter and is configured to be dismounted vertically, which can prevent the valve body 6 from being damaged by an unexpected runaway robot. Further, by the point contact by the ball plunger 96 and the contact by the hook 97 via the heat insulating sleeve, it is possible to suppress heat transfer between the valve main body 6 and the mounting counterpart member robot.
- the platform 11 side can be mounted so as not to be distorted.
- the bracket 95 is attached to an automatic machine (robot) or the like with a screw 123.
- liquid discharge device configured as described above, it is possible to control the amount of liquid controlled simply by setting the syringe 1 or the functional cartridge 2 on which the needle 4 and the valve seat assembly 3 are mounted in advance to the valve body An object can be discharged.
- the example using the syringe 1 is mainly given and demonstrated.
- the procedure of setting the syringe 1 to the valve body 6 will be described. Attach the valve seat assembly 3 to the tip of the syringe 1 and then insert the adapter, for example, the universal adapter 12 corresponding to the rear end opening, and then insert the needle 4 into the inside of the syringe 1 from the central hole 75 of the universal adapter 12 (See Figure 1).
- the adapter for example, the universal adapter 12 corresponding to the rear end opening
- the needle 4 into the inside of the syringe 1 from the central hole 75 of the universal adapter 12 (See Figure 1).
- the extension rod 13 is used because it is shorter than the length of the maximum length syringe compatible with the valve body 6.
- the adjustment of the syringe length is performed to enable fixation of the syringe 1 (see FIG.
- the universal adapter 12 of the present embodiment has a structure that can be adapted to four types of syringes of 55 cc, 30 cc, 10 cc, and 5 cc, which have the highest flowability among several types of syringes distributed in the market.
- the nozzle 87 and the nozzle retainer 86 can be fitted over the nozzle retainer plug 83 after the syringe 1 is attached to the valve body 6.
- the syringe 1 in a needle-embedded state is obliquely inserted from the opening on the front surface of the valve main body 6 toward the nozzle retainer plug 83 of the valve main body 6.
- the portion is housed in the nozzle retainer plug 83 of the valve main body 6, and the syringe 1 is raised around the portion where the inner surface of the nozzle retainer plug 83 and the outer surface of the nozzle adapter 84 are in contact. (See Figure 2).
- the positioning member 14 is returned to the standby position in preparation for the loading of the syringe 1, the connection port 60 at the lower end is pulled into the lockup sleeve 30, and the height of the specified dimension is increased.
- the syringe housing space 93 is formed under the positioning member 14. Therefore, when the syringe can be mounted in the valve main body 6, it means that the entire length on the syringe side is within the specified value, so that liquid leakage due to insufficient tightening between the syringe 1 and the valve seat assembly 3 occurs. There is nothing to do. On the other hand, when the total length on the syringe side does not fall within the specified value, the positioning member 14 and the universal adapter 12 collide and the syringe 1 can not be loaded.
- the syringe 1 housed in the syringe housing space 93 is, as shown in FIG. 5, directed to the contact or guide portion 81 of the lockup sleeve 30 of the valve main body 6 with the second shoulder 71 or the extension rod Positioning of the syringe on the valve body 6 is automatically performed by pushing the positioning shoulders 80 of 13 into contact with each other. That is, in a state where the second shoulder 71 of the universal adapter 12 or the positioning shoulder 80 of the extension rod 13 abuts on the guide portion 81 of the lockup sleeve 30, the positioning member 14 and the universal adapter 12 or the extension rod 13 are pulled. In this case, the needle 4 and the syringe 1 are disposed concentrically.
- the connect sleeve 21 is attracted to the magnet 15 and the yoke 17 of the connecting member 8 on the opposite side of the valve body 6, the connect sleeve 21 is connected at a fixed position only by approaching it There is no risk of falling outside. Moreover, since the solenoid 5, the armature 7, and the connecting member 8 are incorporated in the valve body 6 and the positional relationship between them is fixed, the subtle readjustment that occurs when the syringe 1 is replaced is not necessary. The same is true for the functional cartridge 2 as well as the syringe 1, and the needle 4 is inserted into the functional cartridge 2 or the extension rod 13 is fitted into the functional cartridge 3 as necessary. And the nozzle seat assembly 3 is attached to the tip of the functional cartridge 3 and attached to the valve body 6.
- the compressed air in the space 117 under the piston portion 63 of the positioning member 14 is not compressed because the valve (not shown) for controlling the application of the air pressure to the space 117 is released. It is discharged out of the flow path 114d. Therefore, the positioning member 14 descends smoothly without resistance.
- the lowering of the positioning member 14 causes the lower cavity / connection port 60 of the positioning member 14 to be fitted with the plug 62 at the upper end of the extension rod 13 connected to the third plug portion 61 of the universal adapter 12 or the universal adapter 12;
- the O rings 67, 68 on the circumferential surface of the same plug 61, 62 and the inner circumferential surface of the connection port 60 of the positioning member 14 slide, alignment and connection between the valve body 6 and the syringe 1 are simultaneously completed. And configure the third seal necessary to push the positioning member 14 further downward.
- the positioning member 14 If the positioning member 14 further descends, the O-ring 25 on the circumferential surface of the intermediate connector 18 sealing the hole 28 is released, so that the air supplied to the space 38 above the piston portion 63 is the hole 28 and It leaks into the syringe through the hole 75 of the universal adapter 12 (in some cases the hole 100 of the extension rod 13). Thereby, the positioning member 14 is further depressed while the compressed air fills the inside of the syringe with pressure.
- the entire syringe is pushed down, and the inner circumferential surface of the nozzle retainer plug 83 of the valve main body 6 and the nozzle absorber
- the syringe is pressed so as to be in intimate contact with the outer peripheral surface of 84 and the syringe position is forcibly moved to the original fixed position.
- the needle 4 is also pushed down and attached to the tungsten carbide seat 46 of the valve seat assembly 3. Thereby, the syringe 1 (or functional cartridge 2) is set to the home position.
- the O ring 76 mounted on the universal adapter 12 sealing the syringe 1 is lifted upward, and the positioning member 14 is in contact with the upper surface of the universal adapter 12 It stops. That is, the syringe 1 or the functional cartridge 2 is pressed against the valve seat assembly 3 and held in a fixed position by the positioning member 14 to which the downward force is continuously applied by the application of the air pressure for discharging the liquid material thereafter. Therefore, the displacement of the syringe 1 and the movable region of the needle 4 do not change during the subsequent liquid material application operation, and the discharge amount does not change.
- the air pressure applied to the inside of the syringe through the in-cylinder space 38 above the piston portion 63 of the positioning member 14 is suitable for the discharge of the liquid It is switched to pressure and is prepared for discharge and application of liquid. Therefore, after adjusting the valve stroke adjustment mechanism 50 and setting the discharge time as needed so that the movement amount and stroke amount of the needle 4 correspond to the amount of liquid to be discharged, the solenoid 5 is excited. When this is done, the armature 7 is aspirated and the needle 4 is lifted by a momentary delay to its movement, so that the nozzle 87 is opened and the liquid in the syringe is discharged only while the needle 4 is lifted.
- the armature 7 receives suction accompanying excitation without receiving the strong load of the spring 24 which pushes the needle 4 back to the fixed position at the initial stage of excitation, and pulls up the needle 4 in conjunction with the connecting member 8 after starting the armature 7
- the initial load for pulling up the valve is reduced, and at the same time the actual opening degree is shorter than the excitation time of the solenoid 5, and discharge can be performed even for a short time of less than 1 ms.
- the member / connection member 8 driven by the solenoid 5 on the valve main body 6 side and the needle 4 on the syringe 1 side are interlocked by the magnetic coupling by the magnet 15, and the coaxiality in the syringe 1 independently Since the rectilinearity of the needle by which the force is maintained is secured, the needle does not rotate due to the eccentricity each time the suction is performed even if the degree of coaxiality between the solenoid 5 and the needle 4 is not sufficiently secured.
- the needle 4 is constantly pressed by the spring 24 via the pusher 31, and even if the syringe 1 is removed, the force of the spring 24 makes the removal difficult.
- connection port 60 is disengaged from the third plug of the universal adapter 12 and the restraint on the syringe 1 due to the positioning member 14 is released.
- the positioning member 14 ascends until the hook 16 abuts on the bottom of the valve stroke adjusting rod 32, so that the armature 7 is slightly pushed up from the standby position and the connecting member 8 is pulled up
- the needle in the magnetic coupling state is also pulled up with it, but the magnetic coupling is strong in the coaxial direction with the suction surface but relatively weak against the lateral sliding force, so the syringe can be easily pulled by pulling the syringe 1 And the syringe 1 can be easily removed from the valve body 6. Then, a new syringe or a refilled syringe can be mounted by the above-described procedure.
- an oblique window 111 pierced on the side surface of the platform 11 is used for discharging through the syringe accommodation space 93.
- the rod 112 is inserted, and the syringe 1 in the syringe accommodation space 93 is pushed out by the rod 112 by moving the rod 112 to the front side along the window 111.
- the rod 112 may be inserted from the window 111 to the back of the syringe 1 if necessary, but may be always provided in the syringe accommodation space 93.
- a roller 113 having a retaining flange is fitted to both ends of a removal rod 112 which penetrates the syringe accommodation space 93 and protrudes from the window 111 of both side walls of the platform 11. By fitting, it may be provided so as not to drop off and to be slidably supported using the windows 111 of both side walls.
- the syringe 1 is set in the syringe accommodation space 93, and at the same time, the rod 112 for removal is automatically moved in contact with the back of the syringe 1 and stands by in preparation for ejection.
- the window 111 is disposed so as to be inclined forward and downward so that the rod 112 moves forward by its own weight.
- the present invention is not particularly limited to this, and it is possible to implement even with the window 111 disposed horizontally, and in some cases, the rod 112 is disposed so as to be inclined backwards (syringe accommodation space It may be provided to move by its own weight in the depth direction of 93).
- the extension rod 13 is pushed from behind to The portion in contact with the nozzle adapter 84 can be inclined forward as a rotation center, and the syringe 1 and the like can be discharged out of the syringe accommodation space 93.
- the lock-up sleeve 30 is a longitudinal groove portion of the L-shaped groove 40g. From the inside of the junction box 9 by rotating it backward in the circumferential direction toward 40 gv to separate the dowel 39 from the dowel hole 40 and move it in the L-shaped groove 40 g and place it in the longitudinal groove portion 40 gv of the L-shaped groove 40 g It can be taken out.
- the lock-up sleeve 30 is utilized by utilizing the action that the positioning sleeve is pushed down by the pressure of the flushing air by applying the flushing air for pushing the syringe into position via the air channel 114c. Can be pushed out of the junction box 9 in an instant. And since the lockup sleeve 30, the positioning member 14, the armature 7 and the connecting member 8 can be taken out of the junction box 9, it is possible to disassemble them for each part and to easily perform maintenance.
- the parts are assembled into the lock-up sleeve 30 again, and the lock-up sleeve 30 is inserted into the dowel holes of the dowels by rotating the lock up sleeves 30 toward the dowel holes. It is fixed to the junction box 9.
- the O ring 65 on the circumferential surface of the piston portion 63, the O ring 66 on the circumferential surface of the piston rod portion 64, and the O ring 25 on the circumferential surface of the intermediate connector 18 are sealed by three O-rings of Therefore, even if the positioning member 14 is pushed down by the force of the spring 24 via the pusher 31, even if the positioning member 14 is put into a standby state after the positioning member 14 is pushed up to the upper end, the three O rings are It becomes resistance and can not drop further by its own weight.
- the lower surface of the armature 7 abuts on the upper end surface 49 of the lock-up sleeve 30 and the armature 7 is restrained by the attraction force of the magnet 42 at that position. In that state, when compressed air is fed into the space 38 in which the armature 7 is placed, the positioning member 14 starts to move downward.
- the valve according to the present invention may hold the valve body 6 and manually apply the liquid, but it may be mounted on a robot or the like to discharge the liquid toward the target location by a predetermined amount. It is common to Therefore, mounting on a robot or the like is easy by one-touch operation by inserting the hook 16 portion of the bracket 95 previously fixed to the robot into the larger hole of the back hole 98 of the platform 11 and then depressing the valve body 6 Can do it.
- the valve of the present invention is incorporated in a circulation path for circulating a liquid by applying a hydraulic pressure with a pump not shown, and desired operation is performed by opening and closing the needle while receiving supply of liquid to be pumped. An amount of liquid can be discharged. That is, a functional cartridge 2 as shown in FIG. 15 and FIG. 16 having a liquid material inlet 101 and an outlet 102 and a filter element 103 built in between instead of the syringe 1 of the above embodiment. It is also possible to use the valve of the present invention as a spray gun used in painting and the like by mounting the valve body 6 on the valve body 6.
- the liquid is liquid via the junction box 9 and the extension rod 13 of the valve body 6.
- the movement of the needle 4 can be made smooth by suppressing the spread due to the pressure difference of the U-packing 107 of the sealing plug 104 for pressing the needle 4.
- the heater 89 and the filter can be incorporated in the valve body 6 and the functional module, the heater 89 and the filter can be simplified from the circulation system. In other words, in applications where only a small amount of expensive liquid is applied, it is not necessary to provide a heater and a filter device on the circulation path, and a sufficient amount of liquid necessary to satisfy these is not necessary. Pump circulation is possible with a minimum amount of liquid inside.
- the functional cartridge 2 can be attached to the valve main body 6 by relaying the extension rod 13, the functional cartridge 2 can be directly attached to the valve main body by making the length of the cartridge itself a length that makes the extension rod 13 unnecessary. You may attach it to six. In this case, the rear end of the functional cartridge 2 is directly fitted to the connection port 60 of the positioning member 14 by making it the same size and shape as the third plug (plug 62 of the extension rod 13) 61 of the universal adapter 12 Be done.
- connection structure may be a fitting using a screw as shown in FIG. 16, but it may be a fitting insertion method in which the O ring is merely inserted without being screwed.
- connection between the extension rod 13 and the universal adapter 12 shown in FIG. 9 and FIG. 10 is the same.
- FIG. 17 it is also applicable to the system which receives supply of the liquid pressure-fed from a pressurization tank.
- the pressurized liquid is only supplied to the cartridge 2 from an external pressure tank (not shown), the discharge port 102 for reflux is not necessary.
- the syringe 1 can be applied outside the valve main body 6 as an external syringe type system that receives supply of liquid material.
- the size and shape of the syringe 1 are not affected, and the shape and structure of the adapter 12 'are not restricted.
- the valve of the present invention can combine syringes 1 or various functional modules 2 of various capacities and forms, and by using the extension rod 13, the syringes 1 or various functional modules of various lengths Two can be combined. Therefore, a single valve can be commonly used for the syringe and the functional module.
- the needle 4 and the valve seat assembly 3 which are liquid contact parts are one module integrated in advance, maintenance of the liquid contact parts can be easily performed.
- a dedicated valve body 6 corresponding to each syringe size or each functional cartridge size and configuration may be prepared, and may be mounted via or without a dedicated adapter.
- a solenoid excellent in responsiveness is adopted as the actuator 5, but it is not particularly limited to this, and an actuator such as a hydraulic cylinder or motor of hydraulic pressure or pneumatic pressure, especially pneumatic pressure
- an actuator such as a hydraulic cylinder or motor of hydraulic pressure or pneumatic pressure, especially pneumatic pressure
- the armature 7 in the junction box 9 may be directly driven by the actuator 5, or in some cases, the connecting member 8 may be directly driven.
- the connecting member 8 is fixed to the diaphragm and the elevating operation of the connecting member 8 can be controlled by applying a pressure change to the diaphragm.
- the piston itself may be used as the connecting member 8 or the connecting member 8 may be linked to the piston. That is, a part of the actuator may be a driven member.
- connection port 60 of the positioning member 14 in the above embodiment a portion involved in connection between the syringe 1 or the functional cartridge 2 and the valve main body 6 side charged in the syringe accommodation space 93, ie, the connection port 60 of the positioning member 14 in the above embodiment are connected via the adapter 12 or the extension rod 13, but the present invention is not particularly limited to this, and the end shape of the syringe 1 or the functional cartridge 2 can be commonly fitted to the connection port 60. It is also possible to connect directly by setting it as a shape.
- the adapter 12 or the extension rod 13 is interposed. It is possible to attach to any syringe 1 or the functional cartridge 2 with one touch without having a size that fits in the syringe accommodation space 93.
- the connecting portion 60 at the lower end of the positioning member 14 may be a plug-like sealing mechanism-inserted portion (for example, a plug-like sealing portion directly fitted into the hole of the adapter 12 or the extension rod 13 or the hole of the syringe It is good also as shape like plug 61 of adapter 12).
- the positioning member 14 is moved up and down by the addition of compressed air, but the invention is not particularly limited to this.
- the functional cartridge 2 may be fitted to the positioning member 14, that is, may be attached to the valve body 6.
- a handle or a lever projecting out of the junction box 9 is provided on the positioning member 14 and held to move the positioning member 14 toward and away from the syringe 1 or the functional cartridge 2 housed in the syringe housing space 93. It is good.
- the valve seat assembly 3 is pushed by continuously applying a downward force by interposing an elastic member such as a compression coil spring between the positioning member 14 and the lockup sleeve 30 or the junction box 9.
- the applied syringe 1 or functional cartridge 2 can be held in a fixed position.
Landscapes
- Coating Apparatus (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
2 機能性カートリッジ
3 バルブシートアッセンブリ
4 ニードル
5 アクチュエータ
6 バルブ本体
7 アーマチャ
8 連結部材
9 ジャンクションボックス
10 ノズルベース
11 プラットホーム
12 ユニバーサルアダプタ
13 エクステンションロッド
14 ポジショニングメンバー
15 マグネット
16 フック
17 ヨーク
21 コネクトスリーブ
24 ニードルを定位置に押し戻すための付勢力を常時与えるための付勢機構
30 ロックアップスリーブ
32 ストローク調整用ロッド
36,43 ニードルを定位置に押し戻すための付勢機構を収容する空間を形成するコイルコアとアッパーコア
42 アーマチャを吸着するマグネット
44 付勢機構収容空間の実効長さを変更する樹脂製カラー
45 付勢機構収容空間の長さを可変にするスプリングプラグ
46 バルブシート
49 ニードルの頭頂部の上端面
50 ニードルの上昇端を規制するバルブストローク調整機構
51 トルクリミッタ
60 ポジショニングメンバーの連結部(連結ポート)
61 ポジショニングメンバーの連結部に嵌合するアダプタのプラグ(第3のプラグ) 62 ポジショニングメンバーの連結部に嵌合するエクステンションロッドのプラグ
69 プラットホームの左右両側壁
70 ユニバーサルアダプタのフランジ部
71 アダプタの第2の肩部(ポジショニングメンバーの連結部に嵌合されるプラグ部と隣接する部位)
72 ユニバーサルアダプタの第1のプラグ部
73 ユニバーサルアダプタの第2のプラグ部
74 ユニバーサルアダプタの第1の肩部
75 ユニバーサルアダプタの孔
80 エクステンションロッドの位置決め用肩部(ポジショニングメンバーの連結部に嵌合されるプラグ部と隣接する部位)
81 バルブ本体側のガイド部
93 シリンジ収容空間
94 エクステンションロッドの下端のプラグ部
106 ジャンクションボックスの機構部を収納する内部空間
Claims (20)
- シリンジ内の液状物あるいは機能性カートリッジを介して供給される液状物の吐出が印加される作動ガスの下でのアクチュエータによるニードル弁の開閉により制御される液状物の吐出装置において、
前記シリンジあるいは前記機能性カートリッジの先端に装着されるバルブシートアッセンブリと、
前記シリンジあるいは前記機能性カートリッジの内部に挿入されて前記バルブシートアッセンブリとの間で前記ニードル弁を構成するニードルと、
前記バルブシートアッセンブリ及び前記ニードルを装着した前記シリンジあるいは前記機能性カートリッジを収容するシリンジ収容空間を有すると共に、前記アクチュエータと、前記アクチュエータと別体若しくは一体に構成されて前記アクチュエータによって駆動されかつ前記ニードルと磁気結合される被駆動部材と、該被駆動部材を前記シリンジあるいは前記機能性カートリッジに対して進退動することにより前記シリンジあるいは前記機能性カートリッジが連結されると共に前記シリンジあるいは前記機能性カートリッジを定位置に向けて付勢するポジショニングメンバーとを内蔵するバルブ本体とを少なくとも備え、
前記シリンジあるいは前記機能性カートリッジに収められる前記ニードルと前記バルブ本体内の前記被駆動部材とが磁気結合によって連結されることによって、前記ニードルが挿入されかつ前記バルブシートアッセンブリが装着された状態のまま前記シリンジあるいは前記機能性カートリッジを前記バルブ本体に対して脱着させることが可能であることを特徴とする液状物の吐出装置。 - 前記バルブ本体は、ジャンクションボックスと、前記バルブシートアッセンブリを受け止めて保持するノズルベースと、これらを連結し前記ノズルベースと前記ジャンクションボックスとの間に前記シリンジ収容空間を区画形成するプラットホームとを少なくとも備え、前記ジャンクションボックスに、前記アクチュエータと前記被駆動部材と前記ポジショニングメンバーとが内蔵され、前記ポジショニングメンバーが前記シリンジあるいは前記機能性カートリッジに連結されることによって前記ジャンクションボックスを介して供給される前記作動ガスを前記シリンジあるいは機能性カートリッジに供給する流路が確立されることを特徴とする請求項1記載の吐出装置。
- 前記アクチュエータはソレノイドであり、前記被駆動部材としてアーマチャと連結部材とが前記アクチュエータと共に前記バルブ本体に内蔵され、前記ソレノイドを励磁することで吸引される前記アーマチャの動きを前記連結部材を介して前記ニードルに伝達するように設けられていることを特徴とする請求項1記載の液状物の吐出装置。
- 前記アーマチャと前記連結部材とは分離可能な別体構造であり、尚且つ待機位置にある前記アーマチャと定位置にある前記連結部材との間には軸方向の隙間が設定され、前記アクチュエータによって前記アーマチャが駆動される際に、前記隙間が詰まるまでは前記連結部材が動かされずに前記アーマチャのみが動き、前記隙間が詰まった後には前記アーマチャと前記連結部材とが連動して前記ニードルが一緒に動くことを特徴とする請求項3記載の液状物の吐出装置。
- 前記アーマチャと前記連結部材とは一体化されており、前記アーマチャと前記連結部材とが常時一体となって動くことを特徴とする請求項3記載の液状物の吐出装置。
- 前記ポジショニングメンバーはその下部に前記シリンジあるいは前記機能性カートリッジと嵌合する連結部を有し、前記ポジショニングメンバーが降下したときに前記シリンジあるいは前記機能性カートリッジと嵌合して前記シリンジあるいは前記機能性カートリッジのセンター出しと連結とを可能とする連結機構として機能し、また、前記ポジショニングメンバーが可動範囲の上限まで押し上げられることで前記シリンジあるいは前記機能性カートリッジから外れると共に前記被駆動部材を押し上げて前記シリンジあるいは前記機能性カートリッジと前記被駆動部材との間に間隙を生じさせ、前記ニードルが挿入された状態の前記シリンジあるいは前記機能性カートリッジの離脱を容易にする機構として機能することを特徴とする請求項1記載の液状物の吐出装置。
- 前記プラットホームは、前記シリンジあるいは前記機能性カートリッジの出し入れを行う前面側を除いて左右両側と背面との三面を囲う断面コの字形を成すものである請求項2記載の液状物の吐出装置。
- 前記プラットホームの前記左右両側壁の間隔を前記シリンジ側あるいは前記機能性カートリッジ側の最大径部よりも僅かに広く設定することによって、前記シリンジあるいは前記機能性カートリッジが左右方向に傾き無く収容されることを特徴とする請求項7記載の液状物の吐出装置。
- 前記プラットホームの前記左右両側壁に前記シリンジあるいは前記機能性カートリッジが見通せる窓を設け、前記シリンジ収容空間を貫通する排除用ロッドを前記窓を通して配置し、前記窓に沿って前記ロッドを前記前面側に移動させることにより前記シリンジ収容空間内の前記シリンジあるいは前記機能性カートリッジを前記排除用ロッドによって押し出すことを特徴とする請求項8記載の液状物の吐出装置。
- 前記バルブ本体内の前記アーマチャを挟んで前記アクチュエータと対向する面には、前記アーマチャを吸着するマグネットが配置され、前記アーマチャを自重のみならず磁力で吸引することにより、待機位置に戻すことを特徴とする請求項3記載の液状物の吐出装置。
- 前記ニードルの上昇端を規制するバルブストローク調整機構と、前記ニードルを定位置に押し戻すための付勢力を常時与えるための付勢機構とを互いに独立させて前記バルブ本体に備え、一定の付勢力の下に前記ニードルのストローク量の調整が可能であることを特徴とする請求項1記載の液状物の吐出装置。
- 前記ニードルを前記定位置に押し戻す前記付勢機構を収容する空間の長さが可変であり、前記付勢機構の付勢する力が無段階で調整可能である請求項11記載の液状物の吐出装置。
- 前記付勢機構を収容する空間の頂部にカラーが収容され、前記カラーが高さの異なる他のカラーと取り替えられることで前記付勢機構を収容する前記空間の実効長さが変更されることで前記付勢機構の付勢する力を調整可能とすることを特徴とする請求項11記載の液状物の吐出装置。
- 前記付勢機構は複数のマグネットから成り、互いに同じ極性が対向するように配置したものである請求項11記載の液状物の吐出装置。
- 前記ニードルの頭頂部の上端面が球面に形成されていることを特徴とする請求項1記載の液状物の吐出装置。
- 前記シリンジ収容空間の軸方向有効長さが前記バルブシートアッセンブリと前記ニードルとを定位置に装着したときの前記シリンジあるいは機能性カートリッジの全体の長さよりも長く、かつ前記シリンジあるいは機能性カートリッジの先端に装着される前記バルブシートアッセンブリの締め付けが内部の液状物の漏洩を招く程の隙間を空けているときの長さよりも短い長さに設定され、前記シリンジ収容空間には前記バルブシートアッセンブリの締め付けが不足している前記シリンジあるいは機能性カートリッジが入り込めない構造とされていることを特徴とする請求項1記載の液状物の吐出装置。
- 前記バルブ本体は使用が想定される最大容量の前記シリンジあるいは前記機能性カートリッジが収まる大きさの前記シリンジ収容空間を有し、複数サイズの前記シリンジあるいは前記機能性カートリッジに接続可能なユニバーサルタイプのアダプタと長さの異なる複数のエクステンションロッドとのいずれか一方あるいは双方を組み合わせて用いることにより、シリンジ長さあるいは機能性カートリッジ長さを調整して前記シリンジ収容空間に収まる大きさのあらゆるシリンジあるいは機能性カートリッジが装着可能であり、前記アダプタは、前記ポジショニングメンバーに連結させるプラグ部を上端に有すると共に接続しようとする前記シリンジあるいは前記機能性カートリッジの開口部に対応する形状のプラグ部を他の部位に備えた1つのブロックに一体成型され、さらに各プラグ部の中央を前記ニードルが貫通すると共に前記エクステンションロッドが中継可能とされる孔が設けられ、前記エクステンションロッドは、前記ポジショニングメンバーと連結させる上端のプラグ部と、前記アダプタあるいは対応する前記シリンジないし前記機能性カートリッジに直接連結される下端のプラグ部とを有していることを特徴とする請求項1記載の液状物の吐出装置。
- 前記バルブ本体側にガイド部を備え、前記アダプタあるいは前記エクステンションロッドの前記ポジショニングメンバーに連結される前記プラグ部と隣接する部位と、前記ガイド部とを突き当てることで奥行き側への位置規制が行われることを特徴とする請求項17記載の液状物の吐出装置。
- 前記バルブストローク調整機構にはトルクリミッタが設けられ、前記バルブストローク調整機構に設定値以上のトルクが作用したときに空回りさせることでゼロ点が正確に求められることを特徴とする請求項11記載の液状物の吐出装置。
- 前記ジャンクションボックスの内部空間に収容されるロックアップスリーブを備え、前記連結部材及び前記ポジショニングメンバーは前記ロックアップスリーブに収められてから前記ジャンクションボックス内に収容され、前記ロックアップスリーブはその周面に突出するダボを有し、該ロックアップスリーブを収容する前記ジャンクションボックスの前記内部空間を区画する内周壁面にはダボ穴と該ダボ穴に繋がる周方向の横溝と前記ジャンクションボックスの開口部に至る軸方向の縦溝とで成るL形のガイド溝とを備え、前記ダボを前記ガイド溝を経由してその末端の前記ダボ穴に嵌入させることで前記ロックアップスリーブと前記ジャンクションボックスとが一体化され、前記ロックアップスリーブを周方向に回転させて前記ダボ穴から離脱させた前記ダボを前記縦溝に位置させた状態で前記シリンジを定位置に押しつけるためのフラッシングエアをかけることによって、前記被駆動部材並びに前記ポジショニングメンバーと共に前記ロックアップスリーブを取り付け取り外し可能な構造とすることを特徴とする請求項3記載の液状物の吐出装置。
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EP14740540.1A EP2946840A4 (en) | 2013-01-16 | 2014-01-16 | DISCHARGE DEVICE FOR A LIQUID SUBSTANCE |
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CN104918712A (zh) | 2015-09-16 |
EP2946840A4 (en) | 2016-10-12 |
EP2946840A1 (en) | 2015-11-25 |
JP5629866B1 (ja) | 2014-11-26 |
US20160023233A1 (en) | 2016-01-28 |
CN104918712B (zh) | 2017-05-03 |
JPWO2014112381A1 (ja) | 2017-01-19 |
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