A sheet wrapping device

Abstract

The present invention discloses a sheet wrapping device for transporting sheets. The sheets are provided with insertion holes. The sheet wrapping device includes a frame. A folding channel is formed in the middle of the frame, and the folding channel gradually narrows along the length direction. A linear cam is arranged in the folding channel. Driving mechanisms are arranged on both sides of the frame of the folding channel. A plurality of ejector pins are fixed on the driving mechanisms. The driving mechanisms drive the ejector pins to move along the length direction of the folding channel. The ejector pins extend into the folding channel and correspond to the insertion holes of the sheets to position the sheets. The problem that the current sheet slot wrapping device is prone to cause misalignment of sheet insertion is solved. By inserting the ejector pins into the insertion holes of the sheets, the relative positions of both sides of the sheets are fixed, so that no torsion will occur. After the sheets are bent and enter the linear cam, both sides of the sheets can be perfectly matched, thereby improving the yield rate of sheet wrapping.

Description

Technical Field

[0001] The present invention relates to a packaging device, and particularly to a sheet wrapping device. Background Art

[0002] When packaging a group of raw materials, a paper sheet is used to be bent and then wrap the product. The existing mechanism uses a guide rod to pre-bend the sheet, and then uses a linear cam to insert the two ends of the bent sheet together. However, the sheet is prone to torsion after being bent, resulting in the inability of the bent sheet to be accurately inserted after passing through the linear cam, and the entire sheet assembly is in a misaligned state, affecting the packaging effect and causing rework. Summary of the Invention

[0003] The purpose of the present invention is to provide a sheet wrapping device, which can effectively solve the problem that the existing sheet wrapping device is prone to cause misalignment of sheet insertion.

[0004] To solve the above technical problems, the present invention is realized through the following technical solutions: A sheet wrapping device for transporting a sheet, the sheet is provided with insertion holes, the sheet wrapping device includes a frame, a folding channel is formed in the middle of the frame, the folding channel gradually narrows along the length direction, a linear cam is arranged in the folding channel, driving mechanisms are arranged on the frames on both sides of the folding channel, a plurality of ejector pins are fixed on the driving mechanisms, the driving mechanisms drive the ejector pins to move along the length direction of the folding channel, the ejector pins extend into the folding channel and correspond to the insertion holes of the sheet, and the ejector pins move along a trajectory parallel to the side of the folding channel between the entrance of the folding channel and the linear cam to position the sheet.

[0005] Preferably, the driving mechanism includes a driving sprocket, a driven sprocket and a chain. The driving sprocket and the driven sprocket are both rotatably arranged on the frame. The running plane of the chain is on the same horizontal plane as the folding channel. The ejector pins are fixed on the chain at equal intervals. The interval of each ejector pin is accurately determined through the chain and sprocket transmission, ensuring that the ejector pin can be inserted into the corresponding insertion hole of the sheet, and after insertion, ensuring that the sheet will not twist. Moreover, the running plane of the chain is on the same horizontal plane as the folding channel, which can prevent the sheet from deviating from the folding channel.

[0006] Preferably, the ejector pin includes a fixing block, a mounting seat and an ejector pin body. The fixing block is fixedly connected with the chain, the mounting seat is fixed on the fixing block, a mounting groove is formed in the mounting seat, and the ejector pin body is fixed in the mounting groove. The fixing block is used to fixedly connect the ejector pin with the chain, and the mounting seat is used to fix the ejector pin body. By fixing the ejector pin body in the mounting groove, the relative position of the ejector pin body and the mounting seat is fixed, and the mounting method is simple and easy for batch assembly.

[0007] Preferably, a fixing groove is formed in the fixing block, the width of the fixing groove is equal to the width of the chain, a through hole passing through the fixing groove is formed in the fixing block, and a pin passing through the link of the chain is inserted into the through hole. The chain is fixed in the fixing groove to prevent the chain from moving relative to the fixing block, and the pin on the link is matched with the through hole of the fixing groove for fixing, which facilitates the fixed connection between the fixing block and the chain.

[0008] Preferably, a plurality of sections of trajectory limiting blocks are fixed on the frame beside the folding channel. Each section of the trajectory limiting block is provided with a sliding groove with an opening facing the folding channel, and all the sliding grooves are connected into a trajectory limiting groove. The trajectory limiting groove is parallel to the side of the folding channel, and the driving mechanism moves along the trajectory limiting groove. The trajectory of the driving mechanism is limited by the trajectory limiting block to ensure that the driving mechanism can always drive the ejector pin not to withdraw from the jack during the stage when the ejector pin functions.

[0009] Preferably, two fixing plates are slidably arranged on the frame, and the folding channel is formed between the two fixing plates. A set of the driving mechanisms is fixed on each fixing plate. The sliding direction of the fixing plate is perpendicular to the running direction of the sheet in the folding channel. A control mechanism for driving the two fixing plates to open and close is further arranged on the frame. By adjusting the distance between the two fixing plates, the width of the folding channel can be controlled, so as to adapt to various sheet materials with different sizes and specifications. Moreover, since the sliding direction of the fixing plate is perpendicular to the running direction of the sheet in the folding channel, after adjusting the distance between the two fixing plates, it is not necessary to recalibrate whether the ejector pins on both sides are aligned.

[0010] Preferably, there are two sets of the control mechanisms, and each fixing plate is connected with a set of the control mechanisms. Each set of the control mechanisms includes a driving motor, a lead screw and a control nut. The driving motor is fixed on the frame, the lead screw is rotatably connected to the frame and is parallel to the sliding direction of the fixing plate, and the control nut is fixed on the corresponding fixing plate and is in threaded connection with the lead screw. The movement of the fixing plate is controlled by driving the lead screw with the driving motor, which has high precision, low failure rate, and is easy to operate and maintain.

[0011] Preferably, each set of the control mechanisms includes two lead screws and two control nuts. The two control nuts are respectively fixed at the front and rear ends of the fixing plate, and each control nut corresponds to a lead screw. The driving motor drives one of the lead screws to rotate. Each set of the control mechanisms further includes a connecting rod, and both ends of the connecting rod are respectively connected to the corresponding lead screws through worm gears. The two lead screws and the two control nuts cooperate to ensure the smooth movement of the fixing plate. Moreover, by driving the two lead screws to rotate synchronously with one driving motor, the cost can be effectively reduced, and the moving distances of the front and rear ends of the fixing plate can be ensured to be equal.

[0012] Preferably, a slide rail perpendicular to the running direction of the sheet in the folding channel is provided on the frame, and a slider cooperating with the slide rail is provided at the bottom of the fixing plate. Through the cooperation of the slide rail and the slider, the friction of the fixing plate sliding relative to the frame is effectively reduced.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] A sheet wrapping device for transporting a sheet, wherein the sheet is provided with insertion holes. The sheet wrapping device includes a frame, a folding channel is formed in the middle of the frame, the folding channel gradually narrows along the length direction, a linear cam is arranged in the folding channel, driving mechanisms are arranged on both sides of the folding channel on the frame, a plurality of ejector pins are fixed on the driving mechanisms, the driving mechanisms drive the ejector pins to run along the length direction of the folding channel, the ejector pins extend into the folding channel and correspond to the insertion holes of the sheet, and the ejector pins run along a trajectory parallel to the side of the folding channel between the entrance of the folding channel and the linear cam to position the sheet. By arranging the ejector pins on the driving mechanism, the problem that the current sheet slot wrapping device is prone to cause misalignment of the sheet insertion is solved. By inserting the ejector pins into the insertion holes of the sheet, the relative positions of both sides of the sheet are fixed, so that no torsion will occur. After the sheet is bent and enters the linear cam, both sides of the sheet can be perfectly matched, thereby improving the yield rate of sheet wrapping. In addition, since the driving mechanism drives the ejector pins to run, and at the same time the driving mechanism also provides the power to drive the sheet in the folding channel. As the folding channel gradually narrows, the ejector pins on both sides of the driving mechanism also approach each other, bringing the two sides of the sheet closer to each other to prepare for the sheet to enter the linear cam. Description of the Drawings

[0015] Figure 1 Is a perspective view of a sheet wrapping device of the present invention;

[0016] Figure 2 Is a top view of a sheet wrapping device of the present invention;

[0017] Figure 3 Is a schematic structural view of the driving mechanism in a sheet wrapping device of the present invention;

[0018] Figure 4 Is an exploded structural view of the ejector pin in a sheet wrapping device of the present invention;

[0019] Figure 5 Is a perspective view of a sheet wrapping device of the present invention when wrapping a sheet.

[0020] Reference Signs:

[0021] Sheet 100, Insertion Hole 110;

[0022] Frame 200, folding channel 210, linear cam 220, track limiting block 230, fixing plate 240, slide rail 250, slider 260;

[0023] Ejector pin 310, fixing block 311, mounting seat 312, ejector pin body 313, mounting groove 314, fixing groove 315, through hole 316;

[0024] Drive sprocket 410, driven sprocket 420, chain 430;

[0025] Drive motor 510, lead screw 520, control nut 530, connecting rod 540, worm and worm gear 550. Specific embodiments

[0026] A sheet wrapping device for transporting sheets, with insertion holes formed in the sheets. The sheet wrapping device includes a frame, a folding channel is formed in the middle of the frame, the folding channel gradually narrows along the length direction, a linear cam is arranged in the folding channel, drive mechanisms are arranged on both sides of the folding channel on the frame, a plurality of ejector pins are fixed on the drive mechanisms, the drive mechanisms drive the ejector pins to move along the length direction of the folding channel, the ejector pins extend into the folding channel and correspond to the insertion holes of the sheets to position the sheets. By arranging the ejector pins on the drive mechanisms, the problem that the current sheet slot wrapping device is prone to cause misalignment of the sheet insertion is solved. By inserting the ejector pins into the insertion holes of the sheets, the relative positions of both sides of the sheets are fixed, so that no torsion will occur. After the sheets are bent and enter the linear cam, both sides of the sheets can be completely matched, thereby improving the yield rate of sheet wrapping. In addition, since the drive mechanism drives the ejector pins to move, and at the same time the drive mechanism also provides the power to drive the sheets in the folding channel. As the folding channel gradually narrows, the ejector pins on both sides of the drive mechanism also approach each other, bringing the two sides of the sheets closer to each other to prepare for the sheets to enter the linear cam.

[0027] The embodiments of the present invention will be described in detail below, and the examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0029] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Refer to Figure 1 , Figure 2 is an embodiment of a sheet wrapping device of the present invention for transporting a sheet 100. Opposite ends of the sheet 100 are respectively provided with insertion holes 110. The sheet 100 is bent before entering the sheet 100 packaging device so that the two ends of the sheet 100 approach each other. Insert sheets and slots are also provided at the two ends of the sheet 100. The sheet 100 wrapping device of the present invention is to insert the two ends of the sheet 100 together. The sheet 100 wrapping device includes a frame 200. A folding channel 210 is formed in the middle of the frame 200. The folding channel 210 includes an inlet section and an intermediate section. The inlet section is in a flared shape, that is, the inlet section gradually narrows along the length direction of the folding channel 210 to facilitate the two ends of the bent sheet 100 to approach each other. A linear cam 220 is provided in the intermediate section of the folding channel 210. The linear cam 220 mainly inserts the two ends of the bent sheet 100 together.

[0032] Driving mechanisms are respectively provided on the racks 200 on both sides of the folding channel 210. The driving mechanism can adopt a sprocket drive mechanism or a pulley drive mechanism and other transmission forms. In this embodiment, the sprocket drive mechanism is taken as an example. Mainly, compared with other transmission forms, the sprocket drive mechanism can better determine the spacing between the ejector pins 310 fixed on the chain 430, accurately insert into the jacks 110 at both ends of the sheet 100, position both ends of the sheet 100, and after positioning, the chain 430 is not prone to torsion, so it can be determined that the sheet 100 will not twist. The driving mechanism includes a driving sprocket 410, a driven sprocket 420 and a chain 430. The driving sprocket 410 and the driven sprocket 420 are both rotatably arranged on the rack 200. The driving sprocket 410 is driven by a motor, and the speed of the motor can be determined according to the speed at which the sheet 100 enters the folding channel 210. The center connection line of the driving sprocket 410 and the driven sprocket 420 is arranged along the length direction of the folding channel 210, so as to ensure that one side of the chain 430 wound between the driving sprocket 410 and the driven sprocket 420 can be parallel to the folding channel 210. A plurality of ejector pins 310 are fixedly arranged at intervals on the chain 430. The spacing between the ejector pins 310 is equal to the spacing between the jacks 110 on the sheet 100. The chain 430 drives the ejector pins 310 to run along the length direction of the folding channel 210. The ejector pins 310 extend into the folding channel 210 and run along a trajectory parallel to the side of the folding channel 210 between the entrance of the folding channel 210 and the linear cam 220 to position the sheet 100. That is, the spacing between the ejector pins 310 on both sides of the entrance section of the folding channel 210 is also close to each other in the assembly and can be slowly inserted into the jacks 110 of the sheet 100.

[0033] As Figure 3 , Figure 4 shown, in order to facilitate the fixation of the ejector pin 310 to the chain 430, the ejector pin 310 includes a fixing block 311, a mounting seat 312 and an ejector pin body 313. A fixing groove 315 is formed on the fixing block 311. The width of the fixing groove 315 is equal to the width of the chain 430, so that the chain 430 can be clamped into the fixing groove 315. And through holes 316 are formed on the fixing block 311 and penetrate through the two opposite side walls of the fixing groove 315. There are two through holes 316 and the spacing between them is equal to the pin spacing of each link of the chain 430. The pin passes through the through hole 316 and is inserted into the link, so that while the link is fixed, the fixing block 311 is also fixed to the chain 430. The mounting seat 312 can be connected to the fixing block 311 by bolts or other detachable means. Different mounting seats 312 can be replaced according to different sheets 100. An installation groove 314 is formed on the mounting seat 312. The ejector pin body 313 is fixed in the installation groove 314. The ejector pin body 313 is positioned in multiple directions through the installation groove 314, and then the ejector pin body 313 and the mounting seat 312 are firmly fixed together by bolts passing through the ejector pin body 313.

[0034] In addition, since the chain 430 has a certain flexibility in the horizontal plane, in order to provide a supporting force for the chain 430 in the horizontal direction towards the folding channel 210, a plurality of track limiting blocks 230 are fixed on the frame 200 beside the folding channel 210. Each track limiting block 230 is provided with a chute with an opening facing the folding channel 210, and all the chutes are connected to form a track limiting groove, and the track limiting groove is parallel to the side of the folding channel 210, and the chain 430 slides in the track limiting groove.

[0035] As Figure 1 , Figure 2 shown, the above structure can only wrap the sheet 100 with one width. In order to adapt to more sheets 100 with different specifications, two fixing plates 240 are slidably arranged on the frame 200, and a folding channel 210 is formed between the two fixing plates 240. A set of driving mechanisms are arranged on each fixing plate 240, that is, the driving sprocket 410 and the driven sprocket 420 of the driving mechanism are both rotatably arranged on the fixing plate 240, and the motor for driving the driving sprocket 410 to rotate is also fixed on the fixing plate 240. The sliding directions of the two fixing plates 240 are perpendicular to the running direction of the sheet 100 in the folding channel 210. After adjusting the distance between the fixing plates 240, if only the width of the sheet 100 becomes wider and the position of the insertion hole 110 remains unchanged, there is no need to calibrate the positions of the two side ejector pins 310. Specifically, a slider 260 is fixed at the bottom of the fixing plate 240, and a slide rail 250 is fixed on the frame 200, and the resistance during the sliding of the fixing plate 240 is reduced by the sliding of the slider 260 on the slide rail 250.

[0036] A control mechanism for controlling the opening and closing of the two fixing plates 240 is arranged on the frame 200. There are two sets of control mechanisms, and each fixing plate 240 corresponds to a set of control mechanisms. The control mechanism includes a driving motor 510, two lead screws 520 and two control nuts 530. Since the folding channel 210 is relatively long, a control nut 530 is fixed at each of the front and rear ends of the fixing plate 240. At the same time, two lead screws 520 are rotatably connected to the frame 200 and are respectively threadedly connected to the corresponding control nuts 530. When driving the fixing plate 240 to move, driving forces are obtained at both the front and rear ends of the fixing plate 240 to ensure the smooth sliding of the fixing plate 240. There is a driving motor 510 in each set of control mechanisms. It is necessary to control the rotation of the two lead screws 520 through one driving motor 510 to ensure the synchronism of the two lead screws 520, which is also beneficial to controlling the cost and reducing the difficulty of synchronous operation. Therefore, the driving motor 510 is connected to drive one of the lead screws 520 to rotate, and a connecting rod 540 is connected between the two lead screws 520. The connecting sections of the connecting rod 540 are respectively connected to the corresponding lead screws 520 through worm gears 550. In this way, when one of the lead screws 520 rotates, the other lead screw 520 is driven to rotate synchronously through the connecting rod 540.

[0037] As Figure 5 shown, when in use, the driving motor rotates the driving sprocket 410, and the corresponding ejector pins 310 on the chains 430 on both sides of the folding channel 210 enter the entrance section from the entrance of the folding channel 210. As the ejector pins 310 slide along the track of the side wall of the entrance section, the distance between the ejector pins 310 on both sides gradually shortens, and the ejector pins 310 on both sides are slowly inserted into the insertion holes 110 of the sheet 100. At least two ejector pins 310 are inserted into each side of the same sheet 100 to fix the side edges of the sheet 100 so that they will not be misaligned or twisted. As the chain 430 moves, the ejector pins 310 will carry the sheet 100 into the linear cam 220, and the two sides of the sheet 100 will be inserted together through the linear cam 220. After the sheet 100 enters the linear cam 220, the ejector pins 310 will disengage from the sheet 100. Using the ejector pins 310 to insert into the insertion holes 110 of the sheet 100 instead of the previous guide rods effectively avoids the possible torsion of the sheet 100 before it is bent and inserted into the linear cam 220 for insertion, ensures that the two sides of the sheet 100 can be accurately aligned and inserted together, and improves the wrapping yield of the sheet 100.

[0038] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A sheet wrapping device for transporting sheets, with jacks formed on the sheets. The sheet wrapping device includes a frame, and a folding channel is formed in the middle of the frame. The folding channel gradually narrows along the length direction, and a linear cam is provided in the folding channel. Characterized in that: Driving mechanisms are provided on the frames on both sides of the folding channel. A plurality of ejector pins are fixed on the driving mechanisms. The driving mechanisms drive the ejector pins to move along the length direction of the folding channel. The ejector pins extend into the folding channel and correspond to the jacks on the sheets. The ejector pins move along a trajectory parallel to the side of the folding channel between the entrance of the folding channel and the linear cam to position the sheets. The driving mechanism includes a driving sprocket, a driven sprocket and a chain. The driving sprocket and the driven sprocket are both rotatably arranged on the frame. The driving sprocket is driven to rotate by a driving motor. The running plane of the chain is on the same horizontal plane as the folding channel. The ejector pins are fixed on the chain at equal intervals. The ejector pin includes a fixing block, a mounting seat and an ejector pin body. The fixing block is fixedly connected to the chain. The mounting seat is fixed on the fixing block. A mounting groove is formed on the mounting seat. The ejector pin body is fixed in the mounting groove. A fixing groove is formed on the fixing block. The width of the fixing groove is equal to the width of the chain. A through hole passing through the fixing groove is formed on the fixing block. A pin passing through the link of the chain is inserted into the through hole. Multiple sections of track limiting blocks are fixed on the frame beside the folding channel. Each section of the track limiting block is provided with a sliding groove with an opening facing the folding channel. All the sliding grooves are connected into a track limiting groove. The track limiting groove is parallel to the side of the folding channel. The driving mechanism moves along the track limiting groove. Two fixing plates are slidably arranged on the frame. The folding channel is formed between the two fixing plates. A set of the driving mechanisms is fixed on each fixing plate. The sliding direction of the fixing plate is perpendicular to the running direction of the sheet in the folding channel. A control mechanism for driving the two fixing plates to open and close is also provided on the frame.

2. A sheet wrapping device according to claim 1, Characterized in that: There are two sets of the control mechanisms. Each fixing plate is connected with a set of the control mechanisms. Each set of the control mechanisms includes a driving motor, a lead screw and a control nut. The driving motor is fixed on the frame. The lead screw is rotatably connected to the frame and is parallel to the sliding direction of the fixing plate. The control nut is fixed on the corresponding fixing plate and is threadedly connected to the lead screw.

3. A sheet wrapping device according to claim 2, Characterized in that: Each set of the control mechanisms includes two lead screws and two control nuts. The two control nuts are respectively fixed at the front and rear ends of the fixing plate. Each control nut corresponds to a lead screw. The driving motor drives one of the lead screws to rotate. Each set of the control mechanisms further includes a connecting rod. The two ends of the connecting rod are respectively connected to the corresponding lead screws through worm gears.

4. A sheet wrapping device according to any one of claims 1 to 3, Characterized in that: A slide rail perpendicular to the running direction of the sheet in the folding channel is provided on the frame, and a slider cooperating with the slide rail is provided at the bottom of the fixed plate.

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