CN111391500A - Cardboard transmission structure of hold-in range cladding roller platen - Google Patents

Abstract

The invention relates to the technical field of printing equipment, and discloses a paper board transmission structure with a synchronous belt covering an embossing roller, which comprises a printing roller and the embossing roller, wherein two ends of the printing roller and the embossing roller are rotationally connected to a rack; meanwhile, the problem of uneven height in the conveying process is solved, and the effects of improving the conveying precision of the paper board and improving the printing precision are achieved.

Description

Cardboard transmission structure of hold-in range cladding roller platen

Technical Field

The invention relates to the field of printing equipment, in particular to a paper board transmission structure with a synchronous belt covering a stamping roller.

Background

Among the current corrugated board lithography apparatus, cardboard transmission structure is usually through many driving rollers of horizontal array in the frame, and both ends pass through the chain and drive its synchronous rotation for when the cardboard was arranged in on the driving roller, driven its toward direction of transfer removal by the driving roller. However, the horizontal speeds of the driving rollers are different at different points, i.e. the speed of the cardboard is kept stable and balanced only by the contact at the highest point of each driving roller during the cardboard transportation. However, some paper sheets have slight bending, so that the horizontal speed of the driving roller contacted with some positions of the paper sheets is different during conveying, which results in unstable conveying speed of the paper sheets, and further results in inconsistent conveying speed of the paper sheets and the rotating linear speed of the printing roller, namely forming error of printing position, and affecting the printing quality of products.

Particularly, for the paper boards with smaller sizes, the contact points with the driving rollers are fewer, so that the paper boards are easy to initially sink in the gaps between the driving rollers under the action of gravity, the horizontal transmission speed of the paper boards is unstable, namely, errors of printing positions are formed, and the printing quality of products is influenced; and a transmission structure with a plurality of transmission rollers is adopted, so that the structure is complex and the cost is high.

It is seen that improvements and enhancements to the prior art are needed.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a paperboard transmission structure with a synchronous belt covering a stamping roller, and aims to solve the problem that the printing quality is not high due to low paperboard transmission precision in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a cardboard transmission structure with a synchronous belt covering an embossing roller comprises a printing roller and the embossing roller, wherein two ends of the printing roller and the embossing roller are rotationally connected to a rack, a gear is arranged on the circumferential surface of the middle of the embossing roller, the diameter of the top of the gear is smaller than that of the embossing roller, the gear is covered and connected with the synchronous belt, the other end of the synchronous belt is connected with a transmission wheel, and gear teeth meshed with the gear are arranged on the inner side of the synchronous belt; one end face of the synchronous belt, which is abutted against the paper board, is perpendicular to the center distance between the printing roller and the embossing roller.

In the paperboard transmission structure of the embossing roller coated by the synchronous belts, the synchronous belts are arranged in parallel.

In the paper board transmission structure of the synchronous belt coating embossing roller, the embossing roller comprises a roller body, the center of the roller body is a hollow cavity, connectors rotatably connected with the rack are fixed at two ends of the hollow cavity, and gears are arranged on the outer surface of the circumference of the roller body.

The paper board transmission structure of the synchronous belt cladding embossing roller is characterized by further comprising a vacuum box, the vacuum box comprises a box body and a cover plate covering the top of the box body, the two ends of the box body are fixed to the rack, an air outlet is formed in the bottom of the box body, the embossing roller and the transmission roller are arranged in the box body, the cover plate is fixed to the top surface of the box body, an air vent is formed in the cover plate, and the bearing surface of the synchronous belt is arranged above the cover plate.

The paper board transmission structure of the embossing roller coated by the synchronous belts is characterized in that two or more synchronous belts are used as one group, each group of synchronous belts is connected to the same gear, and the vent holes are formed in the cover plate between the two synchronous belts of each group.

In the paperboard transmission structure of the synchronous belt coating embossing roller, the upper end face of the synchronous belt is a bearing face, the bearing face is horizontally arranged, and the embossing roller is arranged under the printing roller.

In the paperboard transmission structure of the synchronous belt coated embossing roller, the lower end surface of the synchronous belt is horizontally arranged, and the embossing roller is arranged right above the printing roller.

The paperboard transmission structure of the embossing roller coated by the synchronous belt further comprises a supporting plate, the supporting plate is fixed on the rack, a groove is formed in the middle of the supporting plate corresponding to the synchronous belt, the synchronous belt is arranged in the groove, a first rotating shaft is arranged at the center of the driving roller, and two ends of the first rotating shaft are respectively connected with two side walls of the groove in a rotating mode.

In the paperboard transmission structure of the synchronous belt coating embossing roller, one end of the embossing roller is connected with a driving structure, and the driving structure is fixed on the rack.

Has the advantages that:

the invention provides a paper board transmission structure with a synchronous belt covering a stamping roller, which has the following effects compared with the prior art:

1. adopt hold-in range and impression roller cladding design for the impression roller drives synchronous belt drive when supporting the cardboard, and the cardboard is arranged in on the hold-in range, makes it driven to printing roller department printing by the hold-in range, and then realizes the printing, makes to simplify power transmission, only needs to provide power promptly and gives the impression roller, does not need additionally to provide power and gives the driving roller.

2. The design of the synchronous belt and the embossing roller is adopted, so that the outer surface speed of the synchronous belt at the horizontal section is consistent with the pitch linear speed of the synchronous belt, and the linear speed of the printing roller is consistent with the pitch linear speed of the synchronous belt, thereby ensuring the precision of the paperboard.

3. The synchronous belt conveying and the paper board are in surface contact, so that the contact surface is greatly increased, the problem of uneven height in the conveying process is solved, and the effects of improving the conveying precision and the printing precision of the paper board are achieved.

4. Still be equipped with the vacuum chamber in the hold-in range position, the hold-in range uses two or more to be a set of, establishes between two hold-in ranges of every group with the air vent of vacuum chamber intercommunication, consequently, the up end of cardboard, apron and two hold-in ranges form a less cavity with the inside intercommunication of box near the side of air vent, and this cavity also is the negative pressure promptly, because the existence of negative pressure, the bearing surface laminating of cardboard and hold-in range gets tighter for its conveying is more stable.

Drawings

Fig. 1 is a schematic diagram of a paperboard transmission structure of a synchronous belt covering embossing roller provided by the invention, wherein an arrow indicates the conveying direction of a paperboard.

Fig. 2 is a schematic view of a connection structure of a driving roller and a synchronous belt.

Fig. 3 is a top view of a second embodiment of the cardboard transmission structure of the embossing roller covered by the synchronous belt provided by the invention.

Fig. 4 is a sectional view in the direction B-B of fig. 3.

Fig. 5 is a schematic structural diagram of a fourth embodiment of the paperboard transmission structure of the embossing roller covered by the synchronous belt provided by the invention.

Fig. 6 is a schematic structural view of the paperboard transmission structure of the synchronous belt covering and embossing roller shown in fig. 5, wherein the printing roller and the machine frame are removed.

Fig. 7 is a schematic structural diagram of an embossing roller of a paperboard transmission structure of the embossing roller covered by a synchronous belt provided by the invention.

Fig. 8 is a schematic structural diagram of a third embodiment of a paperboard transmission structure of a synchronous belt covering an embossing roller provided by the invention.

In the figure: 1-machine frame, 2-supporting plate, 21-groove, 3-synchronous belt, 31-gear tooth, 311-top surface of gear tooth, 4-driving roller, 42-first rotating shaft, 5-impression roller, 51-connector, 52-roller body, 521-gear, 522-hollow cavity, 6-printing roller, 7-paper board, 8-vacuum box, 81-box body, 811-air outlet, 82-cover plate, 821-air vent and 9-driving structure.

Detailed Description

The invention provides a paper board transmission structure with a synchronous belt covering a stamping roller, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, a first embodiment: the invention provides a paperboard transmission structure with a synchronous belt covering a stamping roller, which comprises a printing roller 6 and a stamping roller 5, wherein two ends of the printing roller 6 and the stamping roller 5 are rotationally connected to a rack 1, the stamping roller 5 is rotationally connected to the position under the printing roller 6, the synchronous belt 3 is connected to the stamping roller 5, the other end of the synchronous belt 3 is connected with a driving roller 4, two ends of the driving roller 4 are rotationally connected with the rack 1, and the upper end face of the synchronous belt 3 is horizontally provided with a bearing face which is perpendicular to the center distance between the printing roller 6 and the stamping roller 5.

Referring to fig. 2, in order to prevent the relative movement between the timing belt 3 and the platen roller 5, a gear 31 is provided inside the timing belt 3, and a gear 53 engaged with the gear 31 is provided on the platen roller 5. Namely, the gear teeth 31 on the synchronous belt 3 are meshed with the gear 53 to form the gear 53 meshing, so that the relative sliding between the synchronous belt 3 and the platen roller 5 can be effectively avoided. The gear 53 of the platen roller 5 can be directly machined on the platen roller 5, that is, the gear 53 is milled at the corresponding position of the platen roller 5 through a machining center, the tooth top radius of the gear 53 is smaller than the radius of the platen roller 5, and the radius difference corresponds to the thickness of the synchronous belt. In this embodiment, the driving roller 4 may be provided with a smooth surface.

Further, the hold-in range cladding is when the platen roller, needs can produce and warp to, because of the influence of thickness, the tooth root position warp more easily than the tooth top position, and be equipped with on platen roller 5 with hold-in range meshing gear 53, make the hold-in range cladding when on platen roller 5, do not receive the teeth of a cogwheel influence of hold-in range, promptly, make the hold-in range cladding warp when the platen roller even, guaranteed the printing precision of cardboard.

In the aforesaid, frame 1, printing roller 6 are the frame 1 and the printing roller 6 of current printing machine, and this application adopts hold-in range 3 and 5 cladding designs of impression roller for impression roller 5 drives hold-in range 3 transmission when supporting cardboard 7, and on hold-in range 3 was arranged in to cardboard 7, makes it drive to printing roller 6 department printing by hold-in range 3, and then realizes the printing, and spreads out cardboard 7 from the opposite side after the printing. So that the power transmission is simplified, i.e. only power needs to be supplied to the impression roller 5, and no additional power needs to be supplied to the transmission roller 4.

The synchronous belt 3 and the embossing roller 5 are in a coating design, so that the outer surface speed of the synchronous belt 3 at the horizontal section is consistent with the pitch linear speed of the synchronous belt, and the linear speed of the printing roller 6 is consistent with the pitch linear speed of the synchronous belt 3, so that the precision of the paper board 7 is ensured. And the transport mechanism of current printing machine passes through driving roller 4 and transmits cardboard 7, there is the clearance between driving roller 4 and the driving roller 4, consequently when transmitting cardboard 7, cardboard 7 is because of receiving the action of gravity, perhaps there is the microbending in cardboard 7 for cardboard 7 conveys next driving roller 4, the contact point is not the peak, the contact point is the different point of horizontal velocity promptly, make both produce relative velocity, there is the friction promptly, and then lead to the conveying speed change of cardboard 7, make its linear velocity inconsistent with printing roller 6, and then influenced the printing precision of cardboard 7. In other words, when the linear speed of the driving roller 4 is not in the horizontal position, the linear speed is divided into two divided speeds in the vertical direction and the horizontal direction, so that the speed in the horizontal direction is lower than the linear speed.

In practical application, often adopt pitch linear velocity in the design, the linear velocity of this application printing roller 6 equals with the pitch linear velocity of hold-in range 3 promptly, and has certain thickness between the surface of hold-in range 3 and the pitch line, and the horizontal segment (being the up end) of hold-in range 3 is the same with pitch linear velocity, and the conveying speed of cardboard 7 is unanimous with the linear velocity of printing roller 6 promptly, has guaranteed the printing precision. The linear velocity of the embossing roller 5 in the horizontal direction is not larger than the pitch line diameter because the outer diameter is larger than the pitch line diameter, so the velocity is larger than the pitch line velocity, but the partial velocity is generated, and the non-horizontal plane is hardly contacted with the paper board 7, namely, the paper board 7 is contacted with the horizontal section of the synchronous belt 3, the conveying velocity of the paper board 7 is not influenced, the conveying of the synchronous belt 3 is in surface contact with the paper board 7, the contact surface is greatly increased, the problem of high and low unevenness in the conveying process is solved, and the effects of improving the conveying precision of the paper board 7 and improving the printing precision are achieved.

Further, the upper end face of the synchronous belt 3 is horizontally arranged and is perpendicular to the center distance between the printing roller 6 and the stamping roller 5, so that the printing point of the paper plate 7 is just at the tangent point of the printing roller 6 and the stamping roller 5, the force applied by the printing roller 6 to the paper plate 7 is perpendicular to the surface of the paper plate 7, and the reverse force applied by the stamping roller 5 to the paper plate 7 is on the same straight line with the force applied by the printing roller 6 to the paper plate 7. Namely, the stress on the upper side surface and the lower side surface of the paper board 7 is balanced during printing, and the printing precision is not influenced by bending of the paper board 7 due to the torque force, so that the printing precision is further improved.

In the above, since the existing embossing roller 5 has a large gap with the driving roller 4, and the timing belt 3 covers the embossing roller 5, so that there is a gap only on one side of the paper sheet 7, the paper sheet 7 is smoothly conveyed.

Referring to fig. 7, in particular, the embossing roller 5 includes a roller body 52, a hollow cavity 522 is formed in the center of the roller body, connectors 51 rotatably connected to the frame are fixed to both ends of the hollow cavity 522, and a gear 521 is disposed on the outer circumferential surface of the roller body 52. The gear 521 is engaged with the gear teeth 31 of the timing belt. And the outer surface of the timing belt 3 at the gear is flush with the outer surface of the roller body 52 at the time of printing. The roller platen 5 comprises a roller body and a connector 51, when the roller platen is installed, the connector 51 is connected to the corresponding position of the rack in a rotating mode, the connector 51 is enabled to have a certain movable amount for installing the roller body in the axial direction, the roller body is fixed on the connector 51, the roller platen 5 is convenient to install, when the synchronous belt needs to be replaced, the synchronous belt can be moved out or sleeved on the roller platen by the aid of the movable amount, and the roller platen is convenient and simple.

Referring to fig. 2, in another embodiment, the driving roller 4 may be an existing belt pulley, and the top surface 311 of the gear teeth is preferably set to be circular arc, and the radius of the circular arc is equal to the radius of the driving roller 4, so that each gear tooth 31 forms a circular arc surface at the joint of the surface of the driving roller 4, that is, the top surfaces 311 of a plurality of gear teeth of the synchronous belt 3 at the joint of the driving roller 4 are combined to form a circular arc surface adhered to the outer surface of the driving roller 4, which is convenient for the two to be adhered. The laminating of the whole teeth of a cogwheel 31 top surface of hold-in range 3 and driving roller 4, the arc surface of the teeth of a cogwheel 31 of hold-in range 3 is in on the same big arc surface at the binding face of each driving roller 4, has increased area of contact, avoids the surface of hold-in range 3 to produce when the conveying and beats, influences the conveying precision of cardboard. In other words, because the synchronous belt has flexibility, in the synchronous belt with the gear teeth, the gear teeth are wrapped on the transmission roller due to the preferential deformation of the tooth root position, the thickness of the tooth top position is larger, the gear teeth are hardly deformed in use, the top surface of the gear teeth 31 is set to be the arc surface 311, the top surface of the gear teeth 31 has a position difference between the highest position and the lowest position, when the gear teeth are transmitted with the transmission roller, the joint surface of the tooth top and the transmission roller is closer to the arc surface, the jumping amount of the difference can be reduced, and the precision is improved. Of course, the driving roller 4 may be an existing timing belt gear.

Specifically, the timing belts 3 are arranged in parallel and are arranged uniformly in the length direction of the platen roller 5, so that the paper board 7 is in contact with the timing belts 3, and the paper board 7 is more stable in conveying.

Referring to fig. 3 and 4, in the second embodiment, on the basis of the first embodiment, the vacuum box 8 is further included, the vacuum box 8 includes a box body 81 and a cover plate 82 covering the top of the box body 81, two ends of the box body 81 are fixed on the frame 1, an air outlet 811 is arranged at the bottom of the box body 81, the platen roller 5 and the driving roller 4 are arranged in the box body 81, the cover plate 82 is fixed on the top surface of the box body 81, a vent 821 is arranged on the cover plate 82, and a bearing surface of the timing belt 3 is arranged above the cover plate 82.

In the aforesaid, gas outlet 811 is connected with the negative pressure pipeline, through set up fan extraction air on the negative pressure pipeline for the inside negative pressure that forms of box, the wallboard is arranged in on the loading end of hold-in range 3, and the cardboard is in the top of air vent promptly, and consequently, the cardboard can be attracted by the negative pressure of air vent department, makes the loading end laminating of cardboard and hold-in range more tight, makes its conveying more stable.

In a further preferred embodiment, two or more timing belts are grouped, each group of timing belts 3 is connected to the same gear 821, and the vent hole is provided in the cover plate between the two timing belts in each group. Wherein, the distance between two adjacent hold-in ranges of the same group is less, and the air vent is established between two hold-in ranges of every group, consequently, the up end of cardboard, apron and two hold-in ranges form a less cavity with the inside intercommunication of box near the side of air vent, and this cavity also is the negative pressure promptly, because the existence of negative pressure, the bearing surface laminating of cardboard and hold-in range gets tighter for its conveying is more stable.

In the above, the vent holes are arranged on the cover plate between the two synchronous belts of each group, so that the air pressure at the negative pressure cavity formed by the upper end surface of the paper plate, the cover plate and one side surface of the two synchronous belts close to the vent holes directly acts on the paper plate, namely the paper plate is moved and always subjected to negative pressure suction. In the existing paperboard conveying process, the vent holes are formed in the belt, and the vent holes can be staggered with the holes in the vacuum box 8 during the movement of the belt, so that the adsorption force of vacuum negative pressure on the paperboard is influenced. In other words, this application establishes the air vent between two hold-in ranges of every group for the adsorption affinity of negative pressure to the cardboard is more stable, and under the condition that provides the same adsorption affinity, the negative pressure of this application is bigger to the adsorption area of cardboard, makes the vacuum chamber can provide littleer negative pressure, and then makes the fan energy consumption that provides the negative pressure for the vacuum chamber littleer, reaches energy-conserving effect.

Referring to fig. 8, embodiment three: in the first or second embodiment, only the upper end surface of the printing paper board 7 is shown, and when the lower end surface of the printing paper board 7 needs to be printed, the vertical positions of the printing roller 6 and the platen roller 5 in the structure can be changed. That is, the timing belt is used for pressing the paper plate, and a conveyor belt for conveying the paper plate is further provided below the timing belt.

Referring to fig. 5 and 6, in the fourth embodiment, on the basis of the first embodiment, a supporting plate 2 is fixed on a frame 1, a groove 21 is formed in the middle of the supporting plate 2 corresponding to a position of a timing belt 3, and the timing belt 3 is disposed in the groove 21. Wherein, the center of the driving roller 4 is provided with a first rotating shaft 42, both ends of the first rotating shaft 42 are respectively connected with the two side walls of the groove 21 in a rotating manner, in other words, in this embodiment, each synchronous belt 3 is correspondingly provided with one driving roller 4, the driving roller 4 can be an existing belt pulley, the driving roller 4 is arranged at one end of the groove 21, and each driving roller 4 is connected to the two side walls of the corresponding groove 21 through the first rotating shaft 42. In this embodiment, one first rotating shaft 42 may be provided for each driving roller 4, or a plurality of driving rollers 4 may be provided on one rotating shaft. The arrangement of the supporting plate 2 fills up the gap between the two synchronous belts 3 corresponding to the position of the impression sleeve 52, and avoids the paper board 7 falling into the gap when the small paper board 7 is conveyed.

In the above structure, in practical application, one end of the platen roller is connected with a driving structure 9, and the driving structure 9 is fixed on the frame, wherein the driving structure may be a motor or a combination of a motor and a speed reducer. Of course, other transmission configurations are possible, for example, a first driving mechanism is connected to one end of the printing roller 6, a second driving mechanism is connected to one end of the platen roller 5, and the first driving mechanism and the second driving mechanism drive the printing roller 6 and the platen roller 5 to rotate synchronously. The first driving mechanism and the first driving mechanism are both driving mechanisms of the existing printing machine, the first driving mechanism and the first driving mechanism are respectively connected with the printing roller 6 and the stamping roller 5 in an existing connection mode, the driving mechanism comprises a speed reducer and a motor, and an output shaft of the speed reducer is connected with the brush roller/stamping roller 5 through a coupler. For example, a transmission mechanism is connected between the printing roller 6 and the platen roller 5, the transmission mechanism is provided on one side of the platen roller 5, and a driving mechanism is connected to the printing roller 6. The transmission mechanism comprises a first transmission wheel fixed at one end of the printing roller 6, a second transmission wheel fixed at one end of the embossing roller 5 and a transmission belt connected between the first transmission wheel and the first transmission wheel. Of course, the transmission mechanism may also employ a gear 53 transmission or a chain transmission.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.

Claims (9)

1. A cardboard transmission structure with a synchronous belt covering a stamping roller comprises a printing roller and a stamping roller, wherein two ends of the printing roller and the stamping roller are rotatably connected to a rack; one end face of the synchronous belt, which is abutted against the paper board, is perpendicular to the center distance between the printing roller and the embossing roller.

2. The cardboard transmission structure of the embossing roller covered by the synchronous belt as claimed in claim 1, wherein the synchronous belt is provided with a plurality of synchronous belts, and the synchronous belts are arranged in parallel.

3. The cardboard transmission structure of the embossing roller covered by the synchronous belt as claimed in claim 2, wherein the embossing roller comprises a roller body, the center of the roller body is a hollow cavity, connectors rotatably connected with the frame are fixed at two ends of the hollow cavity, and the gear is arranged on the circumferential outer surface of the roller body.

4. The cardboard transmission structure of the embossing roller covered by the synchronous belt as claimed in claim 2, further comprising a vacuum box, wherein the vacuum box comprises a box body and a cover plate covering the top of the box body, the two ends of the box body are fixed on the frame, the bottom of the box body is provided with an air outlet, the embossing roller and the driving roller are arranged in the box body, the cover plate is fixed on the top surface of the box body, the cover plate is provided with an air vent, and the bearing surface of the synchronous belt is arranged above the cover plate.

5. A cardboard transmission structure with a simultaneous belt covering a platen roller according to claim 4, wherein two or more simultaneous belts are grouped, each group of simultaneous belts is connected to the same gear, and the vent hole is provided on the cover plate between the two simultaneous belts of each group.

6. The cardboard transmission structure of the embossing roller covered by the synchronous belt as claimed in claim 5, wherein the upper end surface of the synchronous belt is a bearing surface, the bearing surface is arranged horizontally, and the embossing roller is arranged right below the printing roller.

7. The paperboard transmission structure of claim 5, wherein the lower end surface of the timing belt is horizontally arranged, and the platen roller is arranged right above the printing roller.

8. The cardboard transmission structure of the embossing roller covered by the synchronous belt as claimed in claim 2, further comprising a support plate fixed on the frame, wherein a groove is formed in the middle of the support plate corresponding to the synchronous belt, the synchronous belt is disposed in the groove, a first rotating shaft is disposed at the center of the transmission roller, and two ends of the first rotating shaft are rotatably connected to two side walls of the groove respectively.

9. The paperboard transmission structure for covering the embossing roller by the synchronous belt as claimed in claim 1, wherein a driving structure is connected to one end of the embossing roller, and the driving structure is fixed on the frame.

Images