Zero fold paper clamping device

Abstract

The present invention discloses a zero-folding position paper clamping device, which belongs to the field of paper bag bottom gluing machines and is used for transmitting tubular valve mouth paper and clamping the tubular valve mouth paper into the corresponding position of the paper bag, thereby solving the technical problem of forming a zero-folding position at the clamping part of the valve mouth paper tape. The device comprises a bottom plate, a transmission mechanism, a moving mechanism, a folding roller and a sticker cylinder, wherein a part of the transmission mechanism is mounted on the bottom plate, and another part of the transmission mechanism is mounted on the moving mechanism, and the moving mechanism can move relative to the sticker cylinder. The transmission mechanism is provided with a paper feeding channel, and a paper cutting channel with variable length is provided between the paper feeding channel and the sticker cylinder, and the sticker cylinder is used for clamping and breaking the paper tape pressed in by the folding roller.

Description

Technical Field

[0001] The invention belongs to the field of paper bag bottom gluing machines, and in particular relates to a device for conveying tubular valve mouth paper to a paper bag. Background Art

[0002] Paper bags for granular or powdered products require a valve at the seal. This valve connects to the interior of the bag, allowing materials to be directly poured into the bag through the valve. To increase the hardness and sealing properties of the valve, a layer of valve paper is usually attached to the inside of the valve. The head of the paper tape needs to be folded, clamped, and then transported to the corresponding position of the bag. For cylindrical valve-mouth paper bags and large-bottom, small-valve-mouth paper bags, the valve paper tape must first be formed into a cylindrical shape, then cut and inserted into the corresponding position of the bag. If the width of the folded head of the paper tape is too wide, it will affect the normal opening and closing of the bag. Therefore, for these craft paper bags, the head of the paper tape needs to be folded to the smallest possible width, so that the area where the head of the paper tape is clamped forms a zero fold. Summary of the Invention

[0003] The object of the present invention is to provide a zero-folding paper clamping device, which ensures that the valve paper can be attached to the paper bag and the cylindrical valve of the paper bag can be opened and closed normally.

[0004] According to one aspect of the present invention, the zero-folding paper clamping device includes a base plate, a transmission mechanism, a moving mechanism, a folding roller and a sticker tube, a part of the transmission mechanism is installed on the base plate, and the other part of the transmission mechanism is installed on the moving mechanism, and the moving mechanism can move relative to the sticker tube. The transmission mechanism is provided with a paper feeding channel, and a paper cutting channel with variable length is provided between the paper feeding channel and the sticker tube, and the sticker tube is used to clamp and break the paper tape pressed in by the folding roller.

[0005] The moving mechanism includes a slide plate, which is parallel to and slidably mounted on the bottom plate. Another part of the transmission mechanism is mounted on the slide plate, and the slide plate is arranged on one side of the folding roller and the sticker cylinder.

[0006] The transmission mechanism includes a first belt transmission mechanism and a second belt transmission mechanism, the first belt transmission mechanism is on one side of the sticker roller, and the second belt transmission mechanism is on the side of the folding roller, the first belt transmission mechanism includes a first transmission belt, a first traction roller and a first driven roller, the first driven roller is vertically installed on the bottom plate, the first traction roller is vertically installed on the skateboard, the first transmission belt is installed on the first traction roller and the first driven roller, and is tensioned by the first tensioning roller, the first tensioning roller is vertically installed on the bottom plate, the second belt transmission mechanism includes a second transmission belt, a second traction roller and a second driven roller, the second driven roller is vertically installed on the bottom plate, the second traction roller is vertically installed on the skateboard, the second transmission belt is installed on the second traction roller and the second driven roller, and is tensioned by the second tensioning roller, the second tensioning roller is vertically installed on the bottom plate, and the overlapping part of the first transmission belt and the second transmission belt is a paper feeding channel.

[0007] The first transmission belt is provided with a first eccentric roller, a first passing roller and a second passing roller between the first traction roller and the first driven roller. The first eccentric roller and the first passing roller are both vertically mounted on the slide, and the second passing roller is vertically mounted on the bottom plate. The straight section between the first transmission belt installed on the first eccentric roller and the first passing roller, the straight section between the first transmission belt installed on the first passing roller and the first traction roller, and the straight section between the first transmission belt installed on the first traction roller and the first tensioning roller are parallel to each other.

[0008] The second belt transmission mechanism is provided with a second eccentric roller and a third passing roller between the second traction roller and the second driven roller, the second driven roller is an eccentric roller, the second eccentric roller is vertically mounted on the slide, the third passing roller is vertically mounted on the bottom plate, the straight section of the second transmission belt installed on the second driven roller and the second eccentric roller, the straight section of the second transmission belt installed on the second eccentric roller and the second traction roller, and the straight section of the second transmission belt installed on the second traction roller and the second tensioning roller are parallel to each other, and the overlapping part of the straight section of the second transmission belt installed on the second driven roller and the second eccentric roller and the straight section of the first transmission belt installed on the first eccentric roller and the first passing roller is a paper feeding channel.

[0009] The beneficial effects of the present invention are as follows: through the precise control of a knife edge and servo adjustment of the front and rear positions of the conveyor paper belt, and the adjustment of the length of the paper belt entering the paper clamping mouth, the head of the paper belt forms a zero folding position between the folding roller and the sticker cylinder, ensuring the normal opening and closing of the paper bag after the valve mouth paper is pasted. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional schematic diagram of the zero-folding position paper clamping device of the present invention from one viewing angle;

[0011] Figure 2 A three-dimensional schematic diagram of the zero-folding paper clamping device of the present invention from another perspective;

[0012] Figure 3 It is a top view schematic diagram of the zero-folding position paper clamping device of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be further described in detail below with reference to the accompanying drawings.

[0014] like Figure 1 、 2 As shown, the zero-folding position paper clamping device includes a base plate 1, a transmission mechanism 2, a moving mechanism 3, a folding roller 4, and a sticker tube 5. The folding roller 4 and sticker tube 5 are vertically mounted on the base plate 1 and abut against each other. A gear transmission mechanism is used to drive the folding roller 4 and sticker tube 5 to rotate. The folding roller 4 includes a folding cylinder 41, along which a folding shaft 42 is provided. A folding piece 43 is fixed along the folding shaft 42. The folding piece 43 extends from the folding cylinder 41. A cam assembly is provided at the end of the folding cylinder 41 to control the swing of the folding piece 43. The sticker tube 5 includes a sticker tube 51, along which a clamping opening 52 is provided. The clamping opening 52 is provided with a paper clamping shaft 53. A clamping piece 54 is fixed along the paper clamping shaft 53. A cam assembly is provided at the end of the sticker tube 51 to control the swing of the clamping piece 54. The opening and closing of the clamping opening 52 are controlled by the reciprocating swing of the clamping piece 54. The sticker cylinder 51 is provided with a paper pressing belt 55, and the clip 54 is provided with a notch 56 for the paper pressing belt 55 to pass through. The cam assembly of the folding roller 4 and the cam assembly of the sticker cylinder 5 have the same control principle. The cam assembly includes a cam 6, a driven wheel 7 and a swing arm 8. The cam 6 abuts against the driven wheel 7, which is connected to the swing arm 8. The swing arm 8 is connected to the folding shaft 42 or the paper clamping shaft 53. The cam 6 is driven by a cylinder to rotate, and the cam 6 pushes the driven wheel 7 and drives the swing arm 8 to swing, thereby driving the folding shaft 42 and the folding piece 43 or the paper clamping shaft 53 and the clip 54 to swing.

[0015] like Figure 1 As shown, the moving mechanism 3 includes a slide 31, which is positioned to the right of the folding roller 4 and the paper roll 5. Slide 31 is parallel to the base plate 1 and is tilted relative to the base plate 1. Sliders 32 are mounted on two parallel guide rails 33 extending along the length of slide 31. Each guide rail 33 is mounted on the base plate 1. A servo motor 36 drives a belt drive mechanism 34, which in turn drives a screw mechanism 35. This mechanism drives the sliders 32 on slide 31 along the guide rails 33, thereby enabling slide 31 to slide relative to the base plate 1. The sliding position of slide 31 relative to the base plate 1 can be flexibly adjusted according to the length of the paper. This process is driven by a motor, making operation simple and labor-saving.

[0016] like Figure 1 、 3As shown, the transmission mechanism 2 includes a first belt transmission mechanism 21 and a second belt transmission mechanism 22. The first belt transmission mechanism 21 is located on one side of the sticker drum 5. The first belt transmission mechanism 21 includes a first transmission belt 211. Installed counterclockwise along the first transmission belt 211 are a first driven roller 212, a first eccentric roller 213, a first passing roller 214, a first traction roller 215, a first tensioning roller 216, and a second passing roller 217. The first driven roller 212, the second passing roller 217, and the first tensioning roller 216 are all mounted perpendicularly to the base plate 1; the first eccentric roller 213, the first passing roller 214, and the first traction roller 215 are all mounted perpendicularly to the slide plate 31. The transmission part of the first transmission belt 211 where the first driven roller 212, the first eccentric roller 213 and the first passing roller 214 are located is linear, the traction part of the first transmission belt 211 where the first passing roller 214, the first traction roller 215 and the first tensioning roller 216 are located is inverted U-shape, and the transmission part of the first transmission belt 211 where the first tensioning roller 216, the second passing roller 217 and the first driven roller 212 are located is triangular.

[0017] The second belt drive mechanism 22 is located on the side of the pleating roller 4. It comprises a second transmission belt 221. Along the clockwise direction of the second transmission belt 221, a second driven roller 222, a second eccentric roller 223, a second traction roller 224, a second tensioning roller 225, and a third over-roller 226 are mounted. The second driven roller 222, the second tensioning roller 225, and the third over-roller 226 are all mounted perpendicularly to the base plate 1. The second eccentric roller 223 and the second traction roller 224 are both mounted perpendicularly to the slide 31. The paper feed channel 9 is located where the straight transmission section of the second transmission belt 221, where the second driven roller 222 and the second eccentric roller 223 are located, overlaps with the straight transmission section of the first transmission belt 211, where the first eccentric roller 213 and the first over-roller 214 are located. This section is opposite the abutment area of the pleating roller 4 and the paper roll 5. The traction portion of the second transmission belt 221 where the second eccentric roller 223, the second traction roller 224 and the second tensioning roller 225 are located is in an inverted U shape, and the transmission portion of the second transmission belt 221 where the second tensioning roller 225, the third passing roller 226 and the second driven roller 222 are located is in a triangular shape.

[0018] like Figure 1 、 2 As shown in Figures 3 and 4, the transmission belt is used to drive the first traction roller 215 and the second traction roller 224 to rotate to generate traction power, so that the first transmission belt 211 and the second transmission belt 221 compress the paper tape and transmit it between the folding cylinder 41 and the sticker cylinder 51.

[0019] When the slide plate 31 slides away from the folding roller 4 and the sticker tube 5, the first passing roller 214 and the first traction roller 215 move together with the slide plate 31, and the length of the first transmission belt 211 from the first passing roller 214 to the first traction roller 215 remains unchanged and is parallel to the paper feeding channel 9, and is also parallel to the first transmission belt 211 from the first traction roller 215 to the third passing roller 216. Therefore, the length of the first transmission belt 211 remains unchanged during the sliding of the slide plate 31; similarly, the second eccentric roller 223 and the second traction roller 224 move together with the slide plate 31, and the length of the second transmission belt 221 remains unchanged during the sliding of the slide plate 31.

[0020] Furthermore, by adjusting the first eccentric roller 213, the paper tape is pressed tightly against the middle position between the first eccentric roller 213 and the first passing roller 214 in the paper feed channel 9. The folding cylinder 41 and the sticker cylinder 51 rotate synchronously, and the folding blade 43 swings to press the head of the paper tape into the clamping opening 52. Simultaneously, the clamping blade 54 swings to close the clamping opening 52, thereby clamping the end of the paper tape in the clamping opening 52. Because the conveying speed of the first transmission belt 211 and the second transmission belt 221 is lower than the rotation speed of the folding roller 4 and the sticker cylinder 5, due to the speed difference between the two, the paper tape is broken into valve-shaped paper pieces along the cutting edge in the paper cutting channel 10 from the first eccentric roller 213 to the sticker cylinder 51. The length of the valve-shaped paper pieces varies depending on the size of the paper bag. By sliding and adjusting the position of the slide 31 relative to the base plate 1, the length of the paper cutting path 10 is controlled, thereby ensuring that there is only one cutting edge between the first eccentric roller 213 and the sticker drum 51, preventing the situation where two valve-mouth paper pieces are formed after the paper strip is broken. The sticker drum 51 clamps the valve-mouth paper piece and transports it to the location of the paper bag. Once it is in place, the clamp 54 is released, and the paper pressing belt 55 disengages from the notch 56. The paper pressing belt 55 then carries the valve-mouth paper piece out of the clamp 52, transporting it to the corresponding part of the paper bag and applying glue to it.

[0021] Through precise control of a knife edge and servo adjustment of the front and rear positions of the conveyor tape, and adjustment of the length of the tape entering the paper clamping mouth, the head of the paper tape forms a zero fold position between the folding roller 4 and the sticker tube 5, ensuring the normal opening and closing of the paper bag after the valve mouth paper is pasted.

[0022] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. Zero folding paper clamping device, characterized in that: The invention comprises a bottom plate (1), a transmission mechanism (2), a moving mechanism (3), a folding roller (4) and a sticker roll (5), wherein a part of the transmission mechanism (2) is mounted on the bottom plate (1), and another part of the transmission mechanism (2) is mounted on the moving mechanism (3), and the moving mechanism (3) can move relative to the sticker roll (5). The transmission mechanism (2) is provided with a paper feeding channel (9), and a paper cutting channel (10) with a variable length is provided between the paper feeding channel (9) and the sticker roll (5). The sticker roll (5) is used to clamp the paper tape pressed in by the folding roller (4). The movable mechanism (3) includes a slide plate (31), which is parallel to and slidably mounted on the bottom plate (1). Another part of the transmission mechanism (2) is mounted on the slide plate (31). The slide plate (31) is arranged on one side of the folding roller (4) and the sticker drum (5). The transmission mechanism (2) includes a first belt transmission mechanism (21) and a second belt transmission mechanism (22). The first belt transmission mechanism (21) is on one side of the sticker drum (5), and the second belt transmission mechanism (22) is on one side of the folding roller (4). (21) includes a first transmission belt (211), a first traction roller (215) and a first driven roller (212), wherein the first driven roller (212) is vertically mounted on the bottom plate (1), and the first traction roller (215) is vertically mounted on the slide plate (31), the first transmission belt (211) is mounted on the first traction roller (215) and the first driven roller (212), and is tensioned by a first tensioning roller (216), and the first tensioning roller (216) is vertically mounted on the bottom plate (1), and the second belt transmission mechanism (22) includes a second transmission belt (2 21), a second traction roller (224) and a second driven roller (222), the second driven roller (222) is vertically mounted on the bottom plate (1), the second traction roller (224) is vertically mounted on the slide plate (31), the second transmission belt (221) is mounted on the second traction roller (224) and the second driven roller (222), and is tensioned by a second tensioning roller (225), the second tensioning roller (225) is vertically mounted on the bottom plate (1), and the overlapping portion of the first transmission belt (211) and the second transmission belt (221) is a paper feeding channel (9).

2. The zero-folding paper clamping device according to claim 1, characterized in that: The first transmission belt (211) is provided with a first eccentric roller (213), a first over roller (214) and a second over roller (217) between the first traction roller (215) and the first driven roller (212); the first eccentric roller (213) and the first over roller (214) are both vertically mounted on the slide plate (31); the second over roller (217) is vertically mounted on the bottom plate (1); the straight section of the first transmission belt (211) mounted on the first eccentric roller (213) and the first over roller (214), the straight section of the first transmission belt (211) mounted on the first over roller (214) and the first traction roller (215), and the straight section of the first transmission belt (211) mounted on the first traction roller (215) and the first tensioning roller (216) are parallel to each other.

3. The zero-folding paper clamping device according to claim 2, characterized in that: The second belt transmission mechanism (22) is provided with a second eccentric roller (223) and a third roller (226) between the second traction roller (224) and the second driven roller (222), the second driven roller (222) is an eccentric roller, the second eccentric roller (223) is vertically mounted on the slide (31), the third roller (226) is vertically mounted on the bottom plate (1), the second transmission belt (221) is mounted on the straight section between the second driven roller (222) and the second eccentric roller (223), the second transmission belt (2 The straight section of the second transmission belt (21) installed on the second eccentric roller (223) and the second traction roller (224), and the straight section of the second transmission belt (221) installed on the second traction roller (224) and the second tensioning roller (225) are parallel to each other. The straight section of the second transmission belt (221) installed on the second driven roller (222) and the second eccentric roller (223) and the straight section of the first transmission belt (211) installed on the first eccentric roller (213) and the first passing roller (214) overlap to form the paper feeding channel (9).

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