CN106838595B - Multi-point safety light curtain special for bending machine - Google Patents
Multi-point safety light curtain special for bending machine Download PDFInfo
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- CN106838595B CN106838595B CN201710158949.8A CN201710158949A CN106838595B CN 106838595 B CN106838595 B CN 106838595B CN 201710158949 A CN201710158949 A CN 201710158949A CN 106838595 B CN106838595 B CN 106838595B
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- receiving point
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- bending machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
- F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
- F16P3/144—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using light grids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
The invention provides a special multipoint safe light curtain for a bending machine, which belongs to the field of machining equipment and comprises a light curtain emitter and a light curtain receiver; the light curtain emitter is provided with an emitting point capable of emitting light blocks; the light curtain receiver is provided with a plurality of receiving points; the plurality of receiving points are divided into three groups of a front protection area, a protection area and a rear protection area, and each group of receiving points can be shielded relatively independently; when the unshielded photosensitive element does not receive the light blocks emitted by the light curtain emitter, a control electric signal for controlling the emergency stop of the bending machine is generated. According to the multipoint safety light curtain special for the bending machine, provided by the invention, multiple protection modes can be changed by shielding the receiving points in different protection areas so as to cope with bending operations under different conditions, and the requirements of different bending working conditions and the safety protection effect are realized.
Description
Technical Field
The invention relates to the field of machining equipment, in particular to a multipoint safety light curtain special for a bending machine.
Background
The safety light curtain, also called safety grating, punch protector, infrared safety protector, etc. is one kind of photoelectric safety protector. The working principle of the device is that the protective light curtain is generated by emitting infrared rays, and when the light curtain is shielded, the device sends out a shading signal to control mechanical equipment with potential danger to stop working, so that safety accidents are avoided.
In modern chemical industry plants, people and machines work cooperatively, and safety light curtains are required to be arranged in dangerous areas such as mechanical conveying and carrying equipment, various mechanical processing lathes, toxic, high-pressure, high-temperature and the like, which are easy to cause personal injury of operators.
Most of the safety light curtains in the prior art are of a general structure, and bending actions of a bending machine are not further optimized, so that light spots are easily shielded by an upper pressing plate in the box folding process, and therefore the safety light curtains cannot work in the box folding process and cannot play a protective role; moreover, the stopping distance of the bending machine cannot be detected, and the safety requirement is not high; in addition, because current bender protection device support is fixed, when changing different moulds, the altitude mixture control is inconvenient, and the skew angle about, skew angle about can not be transferred, causes the course of working to waste time and energy.
Disclosure of Invention
The invention aims to provide a special multipoint safety light curtain for a bending machine, which is used for solving the defects that the safety light curtain in the prior art is easily blocked by normal deformation of materials and cannot be applied to box folding operation, and simultaneously reducing the cost of the safety light curtain widely used in the prior art;
in order to achieve the purpose, the invention provides a special multipoint safety light curtain for a bending machine, which comprises a light curtain emitter and a light curtain receiver;
the light curtain emitter is provided with an emitting point capable of emitting light blocks;
the light curtain receiver is provided with a plurality of receiving points corresponding to the light blocks emitted by the emitting points, and the receiving points are photosensitive elements; the positions of the plurality of receiving points on the light curtain receiver are different and are divided into three groups of a front protection area, a protection area and a rear protection area, and each group of receiving points can be shielded relatively independently;
when the unshielded photosensitive element does not receive the light blocks emitted by the light curtain emitter, a control electric signal for controlling the emergency stop of the bending machine is generated.
Further, the rear guard zone includes a first receiving point; the middle protection area comprises a second receiving point and a third receiving point, and the connecting line of the two receiving points is in the vertical direction; the front protection area comprises a fourth receiving point and a fifth receiving point, and an included angle is formed between the connecting line of the two receiving points and the vertical direction.
Further, the lowest position of the receiving point monitoring area in the rear protection area is higher than the lowest position of the receiving point monitoring area in the middle protection area; the lowest position of the receiving point monitoring area in the front protection area is higher than the lowest position of the receiving point monitoring area in the middle protection area.
Further, the first receiving point is at a height at least higher than one of the second receiving point and the third receiving point; and the lowest position of the fourth receiving point and the fifth receiving point is at a height at least higher than that of one of the second receiving point and the third receiving point.
Further, the special multipoint safety light curtain for the bending machine further comprises a mounting bracket for respectively mounting the light curtain emitter and the light curtain receiver to an upper beam of the bending machine; the mounting bracket includes:
the bracket fixing seat is provided with a fixing groove, and the central line direction of the fixing groove is a first direction; the fixing groove is fixedly connected with the rack of the equipment to be protected through a fastening bolt capable of moving in the fixing groove;
the cross beam is fixedly connected with the bracket fixing seat, and the arrangement direction of the cross beam is a second direction;
the vertical beam is connected with the cross beam through a track mechanism and a locking mechanism, the arrangement direction of the vertical beams is a third direction, and the vertical beams can move in the third direction relative to the cross beams;
the first adjusting block is fixed at the end part of the vertical beam;
one side of the second adjusting block is hinged with the first adjusting block through a first rotating shaft, and the other side of the second adjusting block is fixedly connected with the first adjusting block through a first screw and a first screw top; the axial direction of the first rotating shaft is a fourth direction;
the middle part of the third adjusting block is provided with a hinging seat, the hinging seat is hinged with the second adjusting block through a second rotating shaft, and the side surface of the third adjusting block is fixedly connected with the second adjusting block through a second screw and a second screw top; the axial direction of the second rotating shaft is a fifth direction;
one side of the fourth regulating block is hinged with the third regulating block through a third rotating shaft, and the other side of the fourth regulating block is fixedly connected with the second regulating block through a third screw and a third screw top; the axial direction of the third rotating shaft is a sixth direction; the fourth regulating block is provided with a fixed position for installing a light curtain emitter or a light curtain receiver;
the first direction, the second direction and the third direction are perpendicular in pairs, and the fourth direction, the fifth direction and the sixth direction are perpendicular in pairs.
Further, the track mechanism comprises a track and a sliding block, wherein the track is arranged on one side of the vertical beam, and the arrangement direction of the track is a third direction; the sliding block is arranged on the cross beam and is connected with the track in an adaptive manner;
the locking mechanism comprises a fixed wrench, an I-shaped nut and a height adjusting block; the vertical beam is provided with a groove in the vertical direction, one end of the I-shaped nut is accommodated in the groove, the other end of the I-shaped nut passes through the height adjusting block and is connected with the fixed spanner, and the fixed spanner rotates to enable the I-shaped nut and the height adjusting block to clamp the edge of the groove;
a blocking block is fixed on the cross beam, the blocking block props against the height adjusting block, so as to realize the fixation of the vertical beam in the vertical direction.
Further, the height adjusting block is connected with a fine adjusting mechanism, and the fine adjusting mechanism comprises a fine adjusting cap, a vertical large screw rod and a horizontal small screw rod; the top of the vertical large screw rod is fixed in a threaded hole in the height adjusting block; the horizontal small screw rod is fixed in the fine adjustment cap, the fine adjustment cap is sleeved on the vertical large screw rod, and the end part of the horizontal small screw rod acts on the thread of the vertical large screw rod.
Further, the bottom of the vertical large screw rod is also connected with a vibration-proof block, and the vibration-proof block is clung to the bottom surface of the fine adjustment cap.
Further, a positioning piece is arranged on the cross beam, and a limiting pin is arranged at one end of the vertical beam; when the vertical beam moves to the maximum travel of the opposite cross beam, the locating piece clamps the limiting pin to fix the vertical beam and the cross beam.
Further, the system also comprises a signal indicating module, wherein the signal indicating module comprises a plurality of indicating lamps used for indicating the signal output state and a plurality of indicating lamps used for indicating the shielding condition of the receiving points.
Compared with the prior art, the special multipoint safety light curtain for the bending machine provided by the invention has the advantages that a plurality of receiving points form three different protection areas of the front protection area, the protection area and the rear protection area, and the three different protection areas act on the front, middle and rear parts of the bending area of the bending machine, wherein the positions of the front, middle and rear parts correspond to the bending area of the bending machine respectively; through the receiving point in the different protection zones of shielding, can change multiple protection mode to deal with the bending operation of different circumstances, realize the requirement and the safety protection effect of different bending operating modes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of a multipoint safety light curtain special for a bending machine;
FIG. 2 is a schematic diagram of a panel of a light curtain emitter of a multi-point safety light curtain for bending machine provided by the invention;
FIG. 3 is a schematic diagram of a panel of a light curtain receiver of a multi-point safety light curtain for a bending machine provided by the invention;
FIG. 4 is a diagram of a structure of the multipoint safety light curtain for the bending machine in a first working mode;
FIG. 5 is a block diagram of the special multipoint safety light curtain for the bending machine in a second working mode;
FIG. 6 is a block diagram of the special multipoint safety light curtain for the bending machine in a third working mode;
fig. 7 is a schematic structural view of a mounting bracket of a multipoint safety light curtain special for a bending machine in a first direction;
FIG. 8 shows a multi-point safety light curtain for bending machine according to the present invention a schematic structural view of the mounting bracket in a second direction;
FIG. 9 is a schematic view of a locking mechanism of a mounting bracket in a first direction;
fig. 10 is a schematic structural view of a locking mechanism of a mounting bracket provided by the invention in a second direction;
FIG. 11 is a cross-sectional view of the locking mechanism shown in FIG. 10;
fig. 12 is a schematic diagram of a connection structure between a first adjusting block and a second adjusting block of a mounting bracket provided by the invention;
fig. 13 is a schematic diagram of a connection structure between a second adjusting block and a third adjusting block of the mounting bracket provided by the invention;
fig. 14 is a schematic diagram of a connection structure between a third adjusting block and a fourth adjusting block of the mounting bracket provided by the invention;
fig. 15 is a schematic structural view of a positioning member of a mounting bracket according to the present invention.
Drawing figures marking:
1-mounting a bracket; 2-a light curtain emitter; 3-a light curtain receiver;
4-a signal indication module; 5-rear stop fingers; 6-a workpiece;
7-a die-feeding cutter; 8-Down a mold;
11-a bracket fixing seat; 12-a cross beam; 13-vertical beams;
14-a first adjusting block; 15-a second adjustment block; 16-a third adjustment block;
17-a fourth adjustment block; 18-a locking mechanism; 19-a fine adjustment mechanism;
20-a track mechanism; 111-a fixed slot; 121-a blocking piece;
122-pointer; 123-positioning pieces; 124-springs;
131-grooves; 132-a limiting pin; 141-a first rotating shaft;
142-first screws; 143-a first silk roof; 151-a second spindle;
152-a second screw; 153-second filament top; 161-a third spindle;
162-third screw; 163-third filament top; 181-fixed wrench;
182-I type nut; 183-height adjustment block; 191-trimming cap;
192-vertical large screw rod; 193-horizontal small screw rod; 194-vibration-proof blocks;
201-track; 202-a slider; 203-an upper limit assembly;
204-a lower limit assembly; 21-optical block; 31-a first receiving point;
32-a second receiving point; 33-a third receiving point; 34-fourth receiving point;
35-a fifth receiving point; 41-a first indicator light; 42-a second indicator light;
43-a third indicator light; 44-fourth indicator light; 45-fifth indicator light;
46-sixth indicator lights; 47-seventh indicator light.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-3, the invention provides a special multipoint safety light curtain for a bending machine, which comprises a light curtain emitter 2, a light curtain receiver 3 and two mounting brackets 1; the light curtain emitter 2 is provided with an emitting point capable of emitting the light block 21, in this embodiment, the light emitted by the emitting point is infrared light, the CLASS1M infrared laser is visible safe laser under normal conditions, and the phase performance is stable and the anti-interference capability is strong.
The light curtain receiver 3 is provided with a plurality of receiving points corresponding to the light blocks 21, the receiving points are distributed at different positions and correspond to different areas of the light blocks 21, and the receiving points are photosensitive elements; the two mounting brackets 1 respectively mount the light curtain emitter 2 and the light curtain receiver 3 to the mounting bracket 1 of the upper beam of the bending machine, so that the emitting point of the light curtain emitter 2 is aligned with the receiving point of the light curtain receiver 3; when the photosensitive element does not receive the light emitted by the light curtain emitter 2, a control electric signal for controlling the emergency stop of the bending machine is generated.
In this embodiment, the light curtain receiver 3 is provided with five receiving points, which are a first receiving point 31, a second receiving point 32, a third receiving point 33, a fourth receiving point 34 and a fifth receiving point 35:
the first receiving points 31 form a rear protection area, and the rear protection area is corresponding to the rear part of the bending working area of the bending machine and mainly used for protecting the rear blocking finger 5 or other objects from collision with the upper die cutter 7 under the unexpected condition;
the second receiving point 32 and the third receiving point 33 form a middle protection area, and correspond to a bending working area of the bending machine, the protection area mainly protects the position of the cutter point and prevents collision with other obstacles, and the hand of a user is mainly protected from being accidentally arranged at the position of the cutter point;
the fourth receiving point 34 and the fifth receiving point 35 form a front protection area, and the front part of the bending work area of the bending machine is correspondingly protected, so that the hands of a person are mainly protected from collision when the metal plate is grabbed.
The receiving points in different protection areas can be shielded relatively independently, namely, the rear protection area, the middle protection area and the front protection area can work independently.
In addition, in order to better realize respective protection contents, the arrangement relation of the receiving points in different areas and the heights of different receiving points are designed:
the connecting line of the second receiving point 32 and the third receiving point 33 is in the vertical direction, and the third receiving point 33 is positioned below the second receiving point 32; the first receiving point 31 is located at a height higher than the second receiving point 32; the connecting line of the fourth receiving point 34 and the fifth receiving point 35 forms an included angle with the vertical direction, the fifth receiving point 35 is positioned in front of and above the fourth receiving point 34, and the height of the fourth receiving point 34 is consistent with or close to that of the second receiving point 32.
The mounting position of the light curtain emitter 2 has the following requirements:
the installation position of the photo-electric protection device is to ensure that the second receiving point 32 is at least 5mm plus a stopping distance from the tip of the upper die cutter 7. The stopping distance is a value set manually, and the detected stopping distance target value is ensured by the part manufacturing size of the mechanical stopping distance detecting device.
The stopping distance should be set to be greater than the mechanical stopping distance. The mechanical stopping distance is a performance parameter of the bending machine. The mechanical stopping distance is generated because the upper beam has certain inertia after the downward movement signal of the upper beam stops in the downward movement process of the upper beam, and is influenced by the response time of a control system, the mechanical property, the hydraulic property and the like of the machine tool, and the upper beam can continuously descend for a small distance and then stop. This small distance serves as the mechanical stopping distance.
And the speed conversion point of the bending machine is larger than 5mm plus a stopping distance. If the third receiving point 33 detects an obstacle, the downward movement signal of the upper beam stops, and after the upper beam continues to descend by a stopping distance due to inertia, the distance between the tip of the upper die cutter 7 and the obstacle is at least 5mm, so that safety is ensured. When the upper beam tool nose descends to the speed conversion point, the third receiving point 33 of the receiving end is still above the metal plate, and the action of the machine is not stopped because the metal plate blocks the laser.
The above safety guarantees, wherein the stopping distance is important, and whether the stopping distance is correct or not is related to whether the photoelectric protection device can work normally or not to protect the safety of operators.
The line of the second receiving point 32 and the third receiving point 33 is 2mm rearward from the bending line, when stopping the downward movement of the machine because the remaining edges are prevented from prematurely blocking the second receiving point 32 and the third receiving point 33 during the folding of the box.
Compared with the prior art, the special multipoint safety light curtain for the bending machine provided by the invention has the advantages that a plurality of receiving points form three different protection areas of the front protection area, the protection area and the rear protection area, and the three different protection areas act on the front, middle and rear parts of the bending area of the bending machine, wherein the positions of the front, middle and rear parts correspond to the bending area of the bending machine respectively; through the receiving point in the different protection zones of shielding, can change multiple protection mode to deal with the bending operation of different circumstances, realize the requirement and the safety protection effect of different bending operating modes.
Specifically, the special multipoint safety light curtain for the bending machine has three working modes.
First operation mode: referring to fig. 4, in the case of bending, that is, when the piece to be bent is a sheet metal plate, the receiving points of the front protection area, the protection area and the rear protection area are all not shielded.
Second mode of operation: referring to fig. 5, if the structure of the piece to be folded is as shown in fig. 5 during the folding of the box, the rear guard finger 5 needs to be moved to be relatively close to the lower side of the first receiving point 31 during normal folding, so that a rear protection area needs to be shielded in order to avoid unexpected machine shutdown; since the folds of the box are below the fourth and fifth receiving points 34, 35 during normal folding, a shielding front protection area is also required in order to avoid accidental machine shut-down.
Third mode of operation: referring to fig. 6, in the process of folding the box, if the structure of the piece to be folded is as shown in fig. 6, only the rear blocking finger 5 needs to move below the first receiving point 31, and the folded edge without metal plate is below the fourth receiving point 34 and the fifth receiving point 35, only the rear protection area is shielded, and the middle protection area and the front protection area work normally.
Of course, this is only a specific embodiment of the present invention, and the number and location distribution of the receiving points of the light curtain emitter 2 of the present invention are not limited to only that different protection areas can be formed, and the receiving points of the different protection areas can be independently shielded.
In this embodiment, the multi-point safety light curtain special for the bending machine further includes a signal indicating module 4, where the signal indicating module 4 includes a plurality of indicator lamps for indicating a signal output state, and a plurality of indicator lamps for indicating a shielded condition of the receiving points.
Two OSSD signals are arranged in the photoelectric protection device, and when the OSSD signals are in an OFF state, the states are abnormal, and faults exist; at this time, the first indicator lamp 41 (lamp 14 red lamp) is lighted, and the first indicator lamp 41 is red lamp.
When the OSSD signal is ON, the indication state is normal, and at this time, the second indicator light 42 (the green light of the lamp 15) is turned ON, the second indicator light 42 is green, and the third indicator light 43 is yellow.
When the second and third modes of operation of the bellows are selected, the partial area is masked, at which time the third indicator light 43 (light 16) will flash.
When the photoelectric protection device is installed, five receiving points of the receiving end are divided into four areas, namely an upper area, a lower area, a front area, a rear area and a front area, a fourth indicator light 44, a fifth indicator light 45, a sixth indicator light 46 and a seventh indicator light 47 (light 17, light 18, light 19 and light 20) respectively represent the alignment and working states of the receiving points of different areas, and if the five receiving points are aligned, the fourth indicator light 44, the fifth indicator light 45, the sixth indicator light 46 and the seventh indicator light 47 are all on; when one or more lamps are not on, the receiving points of the partial area are not aligned with the red block laser.
When the second operation mode of the folding box is selected, the fourth indicator lamp 44, the fifth indicator lamp 45 and the sixth indicator lamp 46 are turned on; when the second folding box mode is selected, the fifth indicator lamp 45 is turned on; when the box folding mode three is selected, the fifth indicator lamp 45 and the sixth indicator lamp 46 are lighted.
The fourth indicator lamp 44, the fifth indicator lamp 45, the sixth indicator lamp 46, and the seventh indicator lamp 47 are blue lamps.
In the present embodiment, referring to fig. 7 and 8, the mounting bracket 1 includes a bracket fixing seat 11, a cross beam 12, a vertical beam 13, a first adjustment block 14, a second adjustment block 15, a third adjustment block 16, and a fourth adjustment block 17.
The bracket fixing seat 11 is provided with a fixing groove 111, and the central line direction of the fixing groove 111 is the X-axis direction; the fixing groove 111 is fixedly connected with the frame of the equipment to be protected by a fastening bolt capable of moving in the fixing groove 111.
Loosening the fastening bolt to enable the fastening bolt to move in the fixing groove 111, so as to realize left and right movement of the bracket fixing seat 11 relative to the frame; when the bracket is moved to a proper position, the fastening bolt is screwed down to firmly fix the bracket fixing seat 11 on the frame, so as to realize positioning; finally, the left and right positions are adjusted.
The cross beam 12 is fixedly connected with the bracket fixing seat 11, and the arrangement direction of the cross beam 12 is the Y-axis direction; the vertical beam 13 is connected to the cross beam 12 by a rail mechanism 20 and a locking mechanism 18.
Specifically:
the track mechanism 20 comprises a track 201 and a sliding block 202, wherein the track 201 is arranged on one side of the vertical beam 13, and the arrangement direction of the track 201 is the Z-axis direction; the sliding block 202 is arranged on the cross beam 12, and the sliding block 202 is connected with the track 201 in a matching way; enabling the vertical beams 13 to move up and down along the rails 201 relative to the cross beams 12; in order to facilitate the handling of the vertical beams 13, handles are provided on the vertical beams 13; when moved into position, the vertical beams 13 are locked in position with the cross beams 12 by the locking mechanism 18.
Further, the method comprises the following steps:
referring to fig. 9-11, the locking mechanism 18 includes a stationary wrench 181, an I-nut 182, and a height adjustment block 183; the vertical beam 13 is provided with a groove 131 in the vertical direction, one end of the I-shaped nut 182 is accommodated in the groove 131, and the other end of the I-shaped nut passes through the height adjusting block 183 to be connected with the fixed spanner 181;
when the fixing wrench 181 is unscrewed, the I-type nut 182 is accommodated in the groove 131 without pressing force, and at this time, the I-type nut 182 can vertically move in the groove 131; when the I-shaped nut 182 is adjusted to a proper position relative to the vertical beam 13, the fixed spanner 181 is screwed, so that the I-shaped nut 182 moves outwards relative to the height adjusting block 183, the I-shaped nut 182 and the height adjusting block 183 clamp the edge of the groove 131, and the height adjusting block 183 is fixed at a proper position of the vertical beam 13;
a blocking block 121 is fixed on the cross beam 12, and the blocking block 121 abuts against the height adjusting block 183 so as to fix the vertical beam 13 in the vertical direction; finally, the adjustment of the upper and lower positions is realized.
The mounting bracket 1 in the prior art can also realize the adjustment of the upper and lower positions, and the positions are generally adjusted up and down by manually tightening screws, so that the error is larger; moreover, the height adjustment needs to be carried out by continuously tightening the screws, so that the time is long, and the adjustment efficiency is low.
In this regard, the upper beam mounting bracket 1 of the safety light curtain provided by the invention is also provided with a fine adjustment mechanism 19, and referring to fig. 9-11, the fine adjustment mechanism 19 is fixed on the height adjusting block 183; the fine adjustment mechanism 19 includes a fine adjustment cap 191, a vertical large screw 192, and a horizontal small screw 193; the top of the vertical large screw rod 192 is fixed in a threaded hole in the height adjusting block 183; the horizontal small screw rod 193 is fixed in the fine adjustment cap 191, the fine adjustment cap 191 is sleeved on the vertical large screw rod 192, and the end part of the horizontal small screw rod 193 acts on the threads of the vertical large screw rod 192. The bottom of the vertical large screw rod 192 is also connected with a vibration-proof block 194, and the vibration-proof block 194 is clung to the bottom surface of the fine adjustment cap 191.
The fine adjustment cap 191 is rotated, the horizontal small screw rod 193 moves along the screw thread of the vertical large screw rod 192, the vertical large screw rod 192 is driven to move relative to the height adjusting block 183, the positions of the vibration preventing block 194 and the height adjusting block 183 are adjusted, and finally the position of the vertical beam 13 relative to the cross beam 12 in the vertical direction is adjusted.
The fine adjustment mechanism 19 can be in the vertical direction, accurate careful height adjustment has the simple operation, and adjustment efficiency is high, controls accurate advantage.
In addition, a pointer 122 is disposed on the blocking block 121, and a scale line for indicating the height of the safety light curtain is disposed at a position of the vertical beam 13 corresponding to the pointer 122. The adaptation of pointer 122 and scale mark can be accurate the height of display light curtain transmitter 2 and light curtain receiver 3, makes the work that the adjustment was focused more convenient.
Referring to fig. 12, the first adjusting block 14 is fixed at the end of the vertical beam 13; the second adjusting block 15 is hinged with the first adjusting block 14 through a first rotating shaft 141, and the axis direction of the first rotating shaft 141 is the Y-axis direction; enabling the second regulating block 15 to rotate about the first rotation shaft 141 to adjust an angle between the second regulating block 15 and the first regulating block 14;
when the angle is adjusted to a proper angle, the positions of the first adjusting block 14 and the second adjusting block 15 are fixed through the first screw 142 and the first screw top 143; finally, the adjustment of the upper and lower angles is realized.
Referring to fig. 13, a hinge seat is disposed in the middle of the third adjusting block 16, and is hinged to the middle of the second adjusting block 15 through a second rotating shaft 151, where an axis direction of the second rotating shaft 151 is a Z-axis direction; enabling the third regulating block 16 to rotate around the second rotation shaft 151 to adjust an angle between the third regulating block 16 and the second regulating block 15;
when the angle is adjusted to a proper angle, the side surface of the third adjusting block 16 is fixedly connected with the second adjusting block 15 through the second screw 152 and the second screw top 153, so that the angle between the second screw and the second screw top is locked; finally, the left and right angles are adjusted.
Referring to fig. 14, one side of the fourth adjusting block 17 is hinged to the third adjusting block 16 through a third rotating shaft 161, and an axial direction of the third rotating shaft 161 is an X-axis direction; enabling the fourth adjustment block 17 to rotate about the third rotation axis 161 to adjust the angle between the fourth adjustment block 17 and the third adjustment block 16;
when the angle is adjusted to a proper angle, the other side of the fourth adjusting block 17 is fixedly connected with the second adjusting block 15 through a third screw 162 and a third screw top 163, so that the angle between the third screw and the third screw top 163 is locked; finally, the adjustment of the front and back angles is realized.
The invention provides an upper beam mounting bracket 1 of a safety light curtain, when in use, a light curtain emitter 2 or a light curtain receiver 3 is mounted on a fixed position of a fourth regulating block 17, namely, the movement of the left and right positions, the movement of the up and down positions, the up and down angle adjustment, the left and right angle adjustment and the adjustment of the front and back angle of the light curtain emitter 2 or the light curtain receiver 3 can be easily realized; the degree of freedom of adjustment is high, can simplify the installation operation of light curtain transmitter 2 or light curtain receiver 3, can adopt multiple adjustment mode to combine together to adjust the mounted position, makes the mounted position adjustment convenient high-efficient, and the installation accuracy is higher.
The upper beam mounting bracket 1 of the safety light curtain is beneficial to the light curtain emitter 2 or the light curtain receiver 3 to light, especially for the multi-point safety light curtain, and is also beneficial to adjusting the arrangement position of the protection light so as to adapt to the protection requirements of different devices; in addition, because the position of the light curtain emitter 2 or the light curtain receiver 3 can be conveniently and accurately adjusted, the precision requirement on the manufacturing sizes of the light curtain emitter 2, the light curtain receiver 3 and other parts is lower, the manufacturing difficulty is also reduced to a certain extent, the equipment cost is reduced, and the production efficiency is improved.
The X-axis, Y-axis, and Z-axis described above form a rectangular coordinate system. Of course, this is only one embodiment of the present invention, and the above-described specific direction of the present invention is not limited thereto. For example, the center line direction of the fixing groove 111 is a first direction, the arrangement direction of the cross beam 12 is a second direction, and the arrangement direction of the vertical beam 13 is a third direction, the first direction, the second direction, and the third direction constituting a rectangular coordinate system; the axial direction of the first shaft 141 is a fourth direction, the axial direction of the second shaft 151 is a fifth direction, the axial direction of the third shaft 161 is a sixth direction, and the fourth direction, the fifth direction and the sixth direction form another rectangular coordinate system, and at least two axes in the two rectangular coordinate systems are parallel to each other.
In the bending production process of the sheet metal of the bending machine, the upper die cutter 7 sometimes needs to be replaced. When the upper die cutter 7 is longer, the upper die cutter 7 is required to be pulled out from two sides of the bending machine, and at the moment, the safety light curtains on two sides of the bending machine are required to be lifted to the highest positions, so that a gap is reserved for pulling out the upper die cutter 7. In the prior art, when the operation is finished, the screw is locked after the screw is loosened to adjust the position, so that the time is more, and the die changing efficiency is lower.
In order to solve the above problems, in the upper beam mounting bracket 1 of the safety light curtain provided by the invention, a positioning piece 123 is arranged in a blocking block 121 of a cross beam 12, referring to fig. 15, one end of the positioning piece 123 is fixedly connected with the blocking block 121 through a spring 124, the middle part of the positioning piece 123 is hinged with the blocking block 121, and the other end of the positioning piece 123 is provided with a clamping hook part; one end of the vertical beam 13 is provided with a limiting pin 132.
However, when the tool changing operation is required, the safety light curtain can be quickly lifted to the highest position, the stop pin 132 props against the hook portion, and under the action of the spring 124, the hook portion is popped up and returns to the original position, so that the stop pin 132 is clamped on the stop feature of the hook portion. The quick limit stop function of replacing the upper die cutter 7 is realized, the time is saved, and the cutter replacing efficiency is improved.
When the upper and lower positions of the safety light curtain are adjusted, if the force is too strong, the safety light curtain is easy to collide with the frame, and damage is caused. In contrast, the upper beam mounting bracket 1 of the safety light curtain is provided with the upper limit component 203 and the lower limit component 204, and the upper limit component 203 and the lower limit component 204 limit the travel of the sliding block 202 within a safety range so as to avoid collision with a frame.
Meanwhile, the upper limit component 203 and the lower limit component 204 comprise limit blocks and buffer stop blocks, and the buffer stop blocks are fixedly connected with the limit blocks; the slider 202 is constrained between two bump stops. The buffer stop can buffer the impact force between the sliding block 202 and the upper limit assembly 203 or the lower limit assembly 204, and reduce the vibration of the safety light curtain.
In the prior art, the mounting bracket 1 of the safety light curtain generally has a translational adjustment structure in horizontal, vertical and other directions, however, the angle adjustment structure is not more, and the angle adjustment function of multiple degrees of freedom is not provided.
In this regard, the present invention also provides an angle adjustment seat for a safety light curtain, referring to fig. 7 to 9, including a first adjustment block 14, a second adjustment block 15, a third adjustment block 16, and a fourth adjustment block 17; the first adjusting block 14 is fixed at the end part of the vertical beam 13; the second adjusting block 15 is hinged with the first adjusting block 14 through a first rotating shaft 141, and the axis direction of the first rotating shaft 141 is the Y-axis direction; the third adjusting block 16 is hinged with the second adjusting block 15 through a second rotating shaft 151, and the axis direction of the second rotating shaft 151 is the Z axis direction; the fourth adjusting block 17 is hinged with the third adjusting block 16 through a third rotating shaft 161, and the axis direction of the third rotating shaft 161 is the X-axis direction; the fourth adjusting block 17 is provided with a fixed position for installing the light curtain emitter 2 or the light curtain receiver 3; the X axis, the Y axis and the Z axis form a rectangular coordinate system.
The angle adjusting seat of the safety light curtain can be widely applied to the mounting bracket 1 in the prior art, can easily realize the adjustment of the upper and lower angles, the left and right angles and the front and rear angles, and can realize the accurate mounting and position adjustment of the safety light curtain by combining the existing translation function of the mounting bracket 1 in the prior art.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The multipoint safety light curtain special for the bending machine is characterized by comprising a light curtain emitter and a light curtain receiver;
the light curtain emitter is provided with an emitting point capable of emitting light blocks;
the light curtain receiver is provided with a plurality of receiving points corresponding to the light blocks emitted by the emitting points, and the receiving points are photosensitive elements; the positions of the plurality of receiving points on the light curtain receiver are different and are divided into three groups of a front protection area, a protection area and a rear protection area, and each group of receiving points can be shielded relatively independently;
when the unshielded photosensitive element cannot receive the light blocks sent by the light curtain emitter, a control electric signal for controlling the bending machine to stop emergently is generated;
the mounting bracket is used for respectively mounting the light curtain emitter and the light curtain receiver to the upper beam of the bending machine; the mounting bracket includes:
the bracket fixing seat is provided with a fixing groove, and the central line direction of the fixing groove is a first direction; the fixing groove is fixedly connected with the rack of the equipment to be protected through a fastening bolt capable of moving in the fixing groove;
the cross beam is fixedly connected with the bracket fixing seat, and the arrangement direction of the cross beam is a second direction;
the vertical beam is connected with the cross beam through the track mechanism and the locking mechanism, the arrangement direction of the vertical beam is a third direction, and the vertical beam can move relative to the cross beam in the third direction;
the first adjusting block is fixed at the end part of the vertical beam;
one side of the second adjusting block is hinged with the first adjusting block through a first rotating shaft, and the other side of the second adjusting block is fixedly connected with the first adjusting block through a first screw and a first screw top; the axial direction of the first rotating shaft is a fourth direction;
the middle part of the third adjusting block is provided with a hinging seat, the hinging seat is hinged with the second adjusting block through a second rotating shaft, and the side surface of the third adjusting block is fixedly connected with the second adjusting block through a second screw and a second screw top; the axial direction of the second rotating shaft is a fifth direction;
one side of the fourth regulating block is hinged with the third regulating block through a third rotating shaft, and the other side of the fourth regulating block is fixedly connected with the second regulating block through a third screw and a third screw top; the axial direction of the third rotating shaft is a sixth direction; the fourth regulating block is provided with a fixed position for installing a light curtain emitter or a light curtain receiver;
the first direction, the second direction and the third direction are perpendicular in pairs, and the fourth direction, the fifth direction and the sixth direction are perpendicular in pairs; the X axis, the Y axis and the Z axis form a rectangular coordinate system, and the first direction and the sixth direction are X axis directions; the second direction and the fourth direction are Y-axis directions, and the third direction and the fifth direction are Z-axis directions.
2. The special multipoint safety light curtain for a bending machine according to claim 1, wherein the rear protection zone comprises a first receiving point; the middle protection area comprises a second receiving point and a third receiving point, and the connecting line of the two receiving points is in the vertical direction; the front protection area comprises a fourth receiving point and a fifth receiving point, and an included angle is formed between the connecting line of the two receiving points and the vertical direction.
3. The multipoint safety light curtain for the bending machine according to claim 2, wherein the lowest position of the receiving point monitoring area in the rear protection area is higher than the lowest position of the receiving point monitoring area in the middle protection area; the lowest position of the receiving point monitoring area in the front protection area is higher than the lowest position of the receiving point monitoring area in the middle protection area.
4. The multi-point safety light curtain for bending machines according to claim 2, wherein the first receiving point is located at a height at least higher than one of the second receiving point and the third receiving point; and the lowest position of the fourth receiving point and the fifth receiving point is at a height at least higher than that of one of the second receiving point and the third receiving point.
5. The multipoint safety light curtain special for the bending machine according to claim 1, wherein the track mechanism comprises a track and a sliding block, the track is arranged on one side of the vertical beam, and the arrangement direction of the track is a third direction; the sliding block is arranged on the cross beam and is connected with the track in an adaptive manner;
the locking mechanism comprises a fixed wrench, an I-shaped nut and a height adjusting block; the vertical beam is provided with a groove in the vertical direction, one end of the I-shaped nut is accommodated in the groove, the other end of the I-shaped nut passes through the height adjusting block and is connected with the fixed spanner, and the fixed spanner rotates to enable the I-shaped nut and the height adjusting block to clamp the edge of the groove;
and a blocking block is fixed on the cross beam and props against the height adjusting block so as to fix the vertical beam in the vertical direction.
6. The multipoint safety light curtain special for the bending machine according to claim 5, wherein the height adjusting block is connected with a fine adjusting mechanism, and the fine adjusting mechanism comprises a fine adjusting cap, a vertical large screw rod and a horizontal small screw rod; the top of the vertical large screw rod is fixed in a threaded hole in the height adjusting block; the horizontal small screw rod is fixed in the fine adjustment cap, the fine adjustment cap is sleeved on the vertical large screw rod, and the end part of the horizontal small screw rod acts on the thread of the vertical large screw rod.
7. The multipoint safety light curtain special for the bending machine according to claim 6, wherein the bottom of the vertical large screw rod is further connected with a vibration-proof block, and the vibration-proof block is clung to the bottom surface of the fine tuning cap.
8. The multipoint safety light curtain special for the bending machine according to claim 1, wherein a positioning piece is arranged on the cross beam, and a limiting pin is arranged at one end of the vertical beam; when the vertical beam moves to the maximum travel of the opposite cross beam, the locating piece clamps the limiting pin to fix the vertical beam and the cross beam.
9. The multi-point safety light curtain special for bending machine according to claim 2, further comprising a signal indicating module, wherein the signal indicating module comprises a plurality of indicator lamps for indicating the signal output state and a plurality of indicator lamps for indicating the shielding condition of the receiving points.
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| CN201710158949.8A CN106838595B (en) | 2017-03-17 | 2017-03-17 | Multi-point safety light curtain special for bending machine |
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| CN107470401B (en) * | 2017-09-12 | 2024-03-12 | 上海恺希机器人有限公司 | Manual locking assembly, stop device and bending machine |
| CN107632325A (en) * | 2017-09-28 | 2018-01-26 | 山东穆柯传感器有限公司 | A kind of special control device of bender protection device |
| CN109093026A (en) * | 2018-10-08 | 2018-12-28 | 山东莱恩光电科技股份有限公司 | A kind of adjustment mechanism of bending machine laser light curtain protective device |
| CN110711800B (en) * | 2019-08-29 | 2021-03-30 | 郑子姣 | Control method for width error and splicing error of elevator car wall |
| CN113819387B (en) * | 2021-10-22 | 2023-06-23 | 深圳市意普兴科技有限公司 | Light curtain protection device for intelligent manufacturing |
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| CN104668318A (en) * | 2015-02-12 | 2015-06-03 | 广州弗斯迪数控科技有限公司 | Novel bending machine |
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| JPH09253753A (en) * | 1996-03-25 | 1997-09-30 | Amada Co Ltd | Safety device of sheet metal working machine |
| ATE327468T1 (en) * | 2002-07-31 | 2006-06-15 | Fiessler Elektronik Gmbh & Co | PROTECTIVE DEVICE FOR MACHINES, SUCH AS BENDING PRESSES, CUTTING MACHINES, PUNCHING MACHINES OR THE LIKE |
| DE10346918A1 (en) * | 2003-10-09 | 2005-05-04 | Sick Ag | Device with protective device |
| CN204664838U (en) * | 2015-05-27 | 2015-09-23 | 深圳市中智控科技有限公司 | Can free setting luminous point shielding high-reliability safety grating |
| CN205702222U (en) * | 2016-04-22 | 2016-11-23 | 山东穆柯传感器有限公司 | GIGAbend Folding System photoelectric protector |
| CN206817149U (en) * | 2017-03-17 | 2017-12-29 | 上海葛世工业自动化有限公司 | The special multipoint safety light curtain of bender |
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| CN104668318A (en) * | 2015-02-12 | 2015-06-03 | 广州弗斯迪数控科技有限公司 | Novel bending machine |
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