A continuous distribution mechanism for PP sheets in the production of the inner lining of an accordion bag

Abstract

The present invention relates to the technical field of sheet distribution equipment, and discloses a continuous PP sheet distribution mechanism for the production of accordion bag liners, including: a first conveying device for conveying groups of PP sheets; a second conveying device for conveying single PP sheets; a second picking and placing mechanism configured to be able to switch between the first conveying device and the second conveying device; the second picking and placing mechanism sucks PP sheets on the first conveying device in the form of single sheets and places the PP sheets on the second conveying device; a guiding box having an inlet and an outlet; the guiding box can switch between a horizontal state and a vertical state, and when in the horizontal state, the inlet of the guiding box is docked with the discharging opening of the second conveying device, and when in the vertical state, the outlet of the guiding box faces the sheet slot of the accordion bag liner forming equipment. It can realize the automatic insertion of PP sheets into the sheet slot, improve the production efficiency of accordion bag liners, reduce the processing cost, and improve the comfort of personnel during production operations.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet distribution equipment, and particularly to a continuous PP sheet distribution mechanism for the production of inner liners of accordion bags. Background Art

[0002] The inner liner of an accordion bag includes two side connecting sheets and a group of partition sheets connected between the two side connecting sheets. The group of partition sheets consists of 12 - 24 sheets. In a single group of partition sheets, the colors of the individual sheets can be the same or different.

[0003] During the production and molding process of the inner liner of an accordion bag, each sheet in the group of partition sheets is mainly inserted into a plurality of sheet slots distributed along the length direction of the accordion bag inner liner forming device by an operator one by one. And during the sheet insertion operation, the line connecting the operator and the plurality of sheet slots is on the same straight line. As the number of inserted sheets increases, the distance from the operator to the nearest empty sheet slot gradually increases, so that the operator needs to lean forward to put the sheet into a sheet slot farther away from himself, resulting in a decrease in the convenience of the operation as the number of sheets inserted into the sheet slot increases, an increase in the labor intensity of the operation as the number of sheets inserted into the sheet slot increases, and thus a lower production and molding efficiency and an increase in the production and molding cost. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a continuous PP sheet distribution mechanism for the production of inner liners of accordion bags, which can effectively solve the problems raised in the background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A continuous PP sheet distribution mechanism for the production of inner liners of accordion bags, used for inserting PP sheets into the sheet slots in the accordion bag inner liner forming device, includes a sheet sending mechanism; the sheet sending mechanism includes:

[0006] A first conveying device for conveying a group of PP sheets;

[0007] A second conveying device for conveying a single PP sheet;

[0008] A second picking and placing mechanism configured to be able to switch between the first conveying device and the second conveying device; sucking a PP sheet on the first conveying device in the form of a single sheet through the second picking and placing mechanism and placing the PP sheet on the second conveying device;

[0009] The feeding box has an inlet and an outlet, and the height of the inner cavity is set to gradually decrease from the inlet to the outlet; the feeding box is configured to be able to switch between a horizontal state and a vertical state; in the horizontal state, the inlet of the feeding box is docked with the discharging opening of the second conveying device, so that the PP sheet can enter the feeding box at least partially through the inlet under the conveying of the second conveying device; in the vertical state, the outlet of the feeding box faces the sheet groove.

[0010] The drive shaft is configured to be able to swing reciprocally around its own central axis.

[0011] The second drive device includes a guide plate, an arc-shaped rack, a gear shaft and a linear rack; the guide plate is fan-shaped and coaxially arranged with the drive shaft, and the arc-shaped rack is coaxially and slidably sleeved on the end of the guide plate far from the drive shaft; the guide plate can swing with the drive shaft and can drive the arc-shaped rack to swing in the same direction; the gear shaft can mesh with the arc-shaped rack and the linear rack.

[0012] The third drive device includes a rocker plate, a connecting rod, a drive column and a drive groove; one end of the connecting rod is rotatably connected to the rocker plate through a shaft, the other end of the connecting rod is fixedly connected to the drive column movably arranged in the drive groove, and the drive groove is opened on the linear rack and arranged along the moving direction of the linear rack.

[0013] The second conveying device is a roller conveyor, and a drive gear meshing with the linear rack is fixedly sleeved on one roller shaft of the roller conveyor.

[0014] A shaft rod is arranged below the inlet of the feeding box, and the rocker plate is sleeved on the surface of the shaft rod and connected to the feeding box.

[0015] Preferably, the sheet sending mechanism further includes a first drive device; the first drive device is used to drive the second picking and placing mechanism to switch between the first conveying device and the second conveying device; during the movement of the second picking and placing mechanism from the second conveying device to the first conveying device, the second drive device drives the second conveying device to act, so that the PP sheet enters the inlet of the feeding box, and then, the third drive device drives the feeding box to switch from the horizontal state to the vertical state.

[0016] Preferably, the first drive device includes a mounting mechanism and a track groove, the track groove is an inverted U-shaped groove, and the second picking and placing mechanism is mounted on the mounting mechanism; the swing of the drive shaft drives the mounting mechanism to move along the track groove in a state parallel to the horizontal plane.

[0017] Preferably, the rotation of the gear shaft drives the linear rack to move relative to the feeding box.

[0018] Preferably, the central angle of the arc-shaped rack is smaller than the central angle of the guide plate.

[0019] Preferably, the swing of the rocker plate around the shaft rod drives the feeding box to switch between the horizontal state and the vertical state.

[0020] Preferably, the sheet feeding mechanism further includes a supply device; the supply device includes at least one carrier on which at least one PP sheet can be stacked; the sheets located on the same carrier are set as a group.

[0021] Preferably, the sheet feeding mechanism further includes a first picking and placing mechanism; the first picking and placing mechanism is configured to be able to switch between the supply device and the first conveying device to transfer a group of PP sheets onto the first conveying device.

[0022] Preferably, it further includes a frame; the frame is used to support the sheet feeding mechanism; the frame is configured to be able to slide relative to the accordion bag inner liner forming device in the length direction of the accordion bag inner liner forming device.

[0023] Compared with the prior art, the present invention provides a continuous distribution mechanism for PP sheets in the production of accordion bag inner liners, having the following beneficial effects:

[0024] 1. It can automatically and continuously insert PP sheets into the sheet slot, improving the production efficiency of the accordion bag inner liner, increasing the output, reducing the processing cost, reducing manual operations, and reducing potential safety hazards in manual operations.

[0025] 2. The carrier for holding the PP sheets to be distributed is far from the accordion bag inner liner forming device during use, and the PP sheets to be distributed are manually placed on the carrier, enabling the operator to stay away from the accordion bag inner liner forming device, so that less heat from the accordion bag inner liner forming device acts on the operator, improving the comfort of the operator during production operations.

[0026] 3. Converting the original manual insertion of PP sheets into the sheet slot to manual placement of sheets on the carrier reduces the operation difficulty of the operator, improves the operation convenience of the operator, and can reduce the training cost of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a schematic diagram of the structure from another perspective of the present invention;

[0029] Figure 3 is a schematic diagram of the structure of the first driving device;

[0030] Figure 4 is a schematic diagram of the structure of the installation mechanism;

[0031] Figure 5 is a schematic diagram of the relative position state of the sub-installation frame and the main installation frame;

[0032] Figure 6Schematic diagram of another relative position state of the secondary mounting bracket and the primary mounting bracket;

[0033] Figure 7 Schematic diagram of the structures of the first driving device and the second driving device;

[0034] Figure 8 Schematic diagram of the structures of the third driving device and the second driving device;

[0035] Figure 9 Schematic diagram of the structure at the entrance of the sheet feeding box;

[0036] Figure 10 Schematic diagram of the cooperation between the present invention and the accordion bag inner liner forming device.

[0037] Wherein: 100, frame body; 200, sheet sending mechanism; 300, accordion bag inner liner forming device; 400, sheet groove; 1, first conveying device; 2, second conveying device; 21, driving gear; 3, second picking and placing mechanism; 4, sheet feeding box; 41, first conveying roller; 42, second conveying roller; 421, shaft rod; 422, conveying wheel; 423, supporting plate; 424, supporting rod; 5, first driving device; 51, supporting plate; 511, track groove; 52, driving shaft; 53, swing arm; 54, sliding frame; 55, mounting mechanism; 551, primary mounting bracket; 552, first stud; 553, second stud; 554, secondary mounting bracket; 555, nut; 556, first spring; 557, second spring; 6, supply device; 61, carrier; 62, fourth driving device; 7, first picking and placing mechanism; 8, second driving device; 81, guide plate; 82, arc-shaped rack; 83, gear shaft; 84, linear rack; 9, third driving device; 91, rocker plate; 92, connecting rod; 93, driving column; 94, driving groove; 10, connecting plate; 11, support; 12, first limiting block; 13, second limiting block. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to Figures 1 to 9, A continuous distribution mechanism for PP sheets in the production of accordion bag liners, which is used to insert a specified number of PP sheets one by one into a plurality of sheet slots 400 of an accordion bag liner forming device 300, including a sheet sending mechanism 200 and a frame 100 for supporting the sheet sending mechanism 200. The frame 100 is configured to be able to slide relative to the accordion bag liner forming device 300 in the length direction of the accordion bag liner forming device 300, so that the distance between the frame 100 and the accordion bag liner forming device 300 can be adjusted, and the sheet outlet of the sheet sending mechanism 200 can move towards the sheet slots 400 at different positions, achieving the effect of inserting PP sheets into the sheet slots 400 at different positions.

[0040] The sheet sending mechanism 200 includes:

[0041] A supply device 6 for supplying PP sheets; the supply device 6 includes at least one carrier 61, and at least one PP sheet can be stacked on the carrier 61; the PP sheets located on the same carrier 61 are set as a group;

[0042] A first conveying device 1 for conveying groups of PP sheets;

[0043] A second conveying device 2 for conveying single PP sheets;

[0044] A first picking and placing mechanism 7, which is configured to be able to switch between the supply device 6 and the first conveying device 1 to transfer a group of PP sheets to the first conveying device 1;

[0045] A second picking and placing mechanism 3, which is configured to be able to switch between the first conveying device 1 and the second conveying device 2; pick up PP sheets on the first conveying device 1 in a single-sheet form through the second picking and placing mechanism 3 and place the PP sheets on the second conveying device 2;

[0046] A guiding box 4, which has an inlet and an outlet, and the height of the inner cavity is set to gradually decrease from the inlet to the outlet; the guiding box 4 is configured to be able to switch between a horizontal state and a vertical state, and when in the horizontal state, the inlet of the guiding box 4 is docked with the discharging opening of the second conveying device 2, so that the PP sheets can enter at least partially into the guiding box 4 through the inlet under the conveying of the second conveying device 2; when in the vertical state, the outlet of the guiding box 4 faces the sheet slot 400;

[0047] A first conveying roller 41 and a second conveying roller 42 are installed at the inlet of the guiding box 4, and a gap is formed between the first conveying roller 41 and the second conveying roller 42; both the first conveying roller 41 and the second conveying roller 42 are configured to be able to rotate around their own central axes, and the rotation directions of the first conveying roller 41 and the second conveying roller 42 are opposite.

[0048] In use, the carrier 61 carrying a set of PP sheets is moved to the upstream of the first conveying device 1. Then, the set of PP sheets is moved onto the first conveying device 1 by the first picking and placing mechanism 7. The first conveying device 1 conveys the PP sheets to the picking station of the second picking and placing mechanism 3. Then, the first conveying device 1 stops. The second picking and placing mechanism 3 moves to the picking station and sucks up one PP sheet. After that, the second picking and placing mechanism 3 moves to the discharging station and places the sucked PP sheet flat on the second conveying device 2. Then, the first conveying roller 41 and the second conveying roller 42 rotate in opposite directions. The second conveying device 2 conveys the PP sheets and makes at least part of the PP sheets pass through the gap between the first conveying roller 41 and the second conveying roller 42 and enter the inlet of the guiding box 4. The first conveying roller 41 and the second conveying roller 42 cooperate to send the PP sheets to the outlet of the guiding box 4. Then, the guiding box 4 swings downward so that the outlet faces a sheet slot 400, and the PP sheets fall into the sheet slot 400 through the outlet of the guiding box 4.

[0049] The picking station of the second picking and placing mechanism 3 is where the second picking and placing mechanism 3 is above the first conveying device 1, and the discharging station of the second picking and placing mechanism 3 is where the second picking and placing mechanism 3 is above the second conveying device 2.

[0050] When the outlet of the guiding box 4 faces the sheet slot 400, the cooperation between the guiding box 4 and the bellows bag inner liner forming device 300 is as Figure 10 shown.

[0051] The supply device 6 is located upstream of the first conveying device 1. The supply device 6 further includes a fourth driving device 62 for driving the carrier 61 to move so that the carrier 61 can switch between the upstream of the first conveying device 1 and the loading station of the carrier 61. At the loading station of the carrier 61, an operator places a group of PP sheets on the carrier 61.

[0052] In a specific implementation process, to improve the loading efficiency of the group of PP sheets, a plurality of carriers 61 are provided. The plurality of carriers 61 can be evenly spaced vertically or horizontally. The fourth driving device 62 is a linear motor module. The linear motor module is installed on the frame 100, and the moving end of the linear motor module is connected to and fixes a plurality of carriers 61. The cooperation between the fourth driving device 62 and the plurality of carriers 61 evenly spaced vertically is as Figure 1 shown. The fourth driving device 62 drives the plurality of carriers 61 to move up and down, so that the plurality of carriers 61 sequentially move from above the upstream of the first conveying device 1 to the upstream of the first conveying device 1

[0053] upstream.

[0054] It should be noted that although the cooperation between the fourth driving device 62 and the plurality of carriers 61 evenly spaced horizontally is not shown, it can be obtained according to common knowledge.

[0055] It should be noted that in order to further improve the loading efficiency of the grouped PP sheets, in the specific implementation process, when multiple carriers 61 are evenly spaced vertically, two or more supply devices 6 can be provided, and the fourth drive devices 62 in the two or more supply devices 6 are all horizontally slidably mounted on the frame 100, and the two or more supply devices 6 slide to the upstream of the first conveying device 1 in sequence.

[0056] The first conveying device 1 is a flat belt conveyor with its own power. The body of the flat belt conveyor is mounted on the frame 100.

[0057] The second conveying device 2 is a roller conveyor without power. The body of the roller conveyor is mounted on the frame 100. A driving gear 21 is fixedly sleeved on a roller shaft of the roller conveyor. The PP sheet is placed flat on the rollers, and the rotation of the rollers drives the PP sheet to move towards the guide box 4.

[0058] The first picking and placing mechanism 7 is a pneumatic gripper. The pneumatic gripper is mounted on the frame 100 through a two-axis robotic arm, and the two-axis robotic arm drives the pneumatic gripper to move along the length direction (the conveying direction of the first conveying device 1) and the width direction of the first conveying device 1. When placing the PP sheet on the carrier 61 onto the first conveying device 1, the pneumatic gripper first moves along the length direction of the first conveying device 1 to the position of the carrier 61, picks up the PP sheet, and then moves along the length direction of the first conveying device 1 to the first conveying device 1, places the PP sheet on the first conveying device 1, and then moves along the width direction of the first conveying device 1 to the side of the PP sheet to provide a moving space for the PP sheet to be conveyed by the first conveying device 1.

[0059] A plurality of second picking and placing mechanisms 3 are provided, and the plurality of second picking and placing mechanisms 3 are divided into two groups. The two groups of second picking and placing mechanisms 3 are distributed along the width direction of the PP sheet (the conveying direction of the first conveying device 1), and the second picking and placing mechanisms 3 in the same group are distributed along the length direction of the PP sheet (the direction perpendicular to the conveying direction of the first conveying device 1). The second picking and placing mechanism 3 is a pneumatic suction pen.

[0060] In the specific implementation, at least two second picking and placing mechanisms 3 are set as a group, and the plurality of second picking and placing mechanisms 3 adsorb the PP sheet in a rectangular distribution.

[0061] It further includes a first driving device 5, a second driving device 8 and a third driving device 9; the first driving device 5 is used to drive the second picking and placing mechanism 3 to switch between the first conveying device 1 and the second conveying device 2; during the movement of the second picking and placing mechanism 3 from the second conveying device 2 to the first conveying device 1, the second driving device 8 drives the rollers on the roller conveyor to rotate through the driving gear 21, so that the PP sheet passes through the gap and enters the inlet of the guiding box 4, and then, the third driving device 9 drives the guiding box 4 to switch from the horizontal state to the vertical state.

[0062] The first driving device 5 includes a support plate 51 fixedly installed on one side of the frame body 100. An inverted U-shaped track groove 511 is formed on the support plate 51 located above the frame body 100. A driving shaft 52 is rotatably installed at one end of the support plate 51 away from the second conveying device 2. The driving shaft 52 is configured to be able to swing reciprocally around its own central axis. A swing arm 53 is fixed on the outer surface of the driving shaft 52. A sliding frame 54 is slidably installed at one end of the support plate 51 facing the second conveying device 2. Part of the sliding frame 54 passes through the track groove 511 and is slidably arranged in the groove on the swing arm 53. An installation mechanism 55 is fixedly installed on the sliding frame 54. Both groups of the second picking and placing mechanisms 3 are installed on the installation mechanism 55.

[0063] By the reciprocal swing of the driving shaft 52, the swing arm 53 is driven to swing, so that the sliding frame 54 reciprocally moves along the track groove 511, realizing the switching of the second picking and placing mechanism 3 between the first conveying device 1 and the second conveying device 2.

[0064] The sliding frame 54 is slidably installed on the support plate 51 through a first slide rail, a first slider and a second slide rail. The first slide rail is horizontally fixed at one end of the support plate 51 facing the second conveying device 2. The surface of the first slide rail is slidably sleeved with a first slider, and the first slider is slidably sleeved on the surface of the first slide rail. The second slide rail is vertically slidably installed on the first slider, and the top end of the second slide rail is fixedly connected to the sliding frame 54; with such a set structure, during the swing of the swing arm 53, the second slide rail moves in the horizontal and vertical directions, the sliding frame 54 moves along the track groove 511 in a vertically downward state, the installation mechanism 55 moves with the sliding frame 54 in a state parallel to the horizontal plane, and the second picking and placing mechanism 3 moves with the installation mechanism 55 in a state where the adsorption end is vertically downward.

[0065] To prevent the PP sheets located below the PP sheet being picked up by the second pick-and-place mechanism 3 from being lifted, the installation mechanism 55 includes a main mounting frame 551 and two sub-mounting frames 554. The main mounting frame 551 is fixedly connected to the carriage 54. One side of the upper end of the main mounting frame 551 away from the feeding box 4 is sunken and a sub-mounting frame 554 is installed. Another sub-mounting frame 554 is installed on the other side of the upper end of the main mounting frame 551. Both sub-mounting frames 554 can move up and down relative to the main mounting frame 551, and the moving range of the sub-mounting frame 554 away from the feeding box 4 is greater than that of the other sub-mounting frame 554. A set of second pick-and-place mechanisms 3 are fixedly installed on the two sub-mounting frames 554 respectively.

[0066] Further, the two sub-mounting frames 554 are respectively slidably sleeved on the first stud 552 and the second stud 553. Both the first stud 552 and the second stud 553 are fixed on the main mounting frame 551, and the first stud 552 is close to the feeding box 4. Nuts 555 are screwed on the tops of the first stud 552 and the second stud 553. A first spring 556 is sleeved on the surface of the first stud 552 between the nut 555 and the sub-mounting frame 554, and a second spring 557 is sleeved on the surface of the second stud 553 between the nut 555 and the sub-mounting frame 554. The second spring 557 is more likely to undergo elastic deformation than the first spring 556.

[0067] By arranging the installation mechanism 55 as above, when there is no PP sheet on the second pick-and-place mechanism 3, both sub-mounting frames 554 abut against the upper surface of the main mounting frame 551. The plane where the lower surface of the set of second pick-and-place mechanisms 3 away from the feeding box 4 is located is below the plane where the lower surface of the other set of second pick-and-place mechanisms 3 is located, as Figure 5 shown.

[0068] Therefore, when the two sets of second pick-and-place mechanisms 3 approach from top to bottom, the set of second pick-and-place mechanisms 3 away from the feeding box 4 first contacts the upper surface of the PP sheet. Then, the other set of second pick-and-place mechanisms 3 contacts the upper surface of the PP sheet. At this time, a gap is formed between the sub-mounting frame 554 away from the feeding box 4 and the main mounting frame 551, as Figure 6 shown. During the process of sucking and moving the PP sheet, the set of second pick-and-place mechanisms 3 close to the feeding box 4 adsorbs the PP sheet. Then the main mounting frame 551 moves upward to lift the PP sheet. The set of second pick-and-place mechanisms 3 close to the feeding box 4 moves upward first, and the position of the set of second pick-and-place mechanisms 3 away from the feeding box 4 remains basically unchanged, so that one end of the PP sheet close to the feeding box 4 warps by a certain amplitude. Then, the set of second pick-and-place mechanisms 3 away from the feeding box 4 adsorbs the PP sheet, and the main mounting frame 551 continues to move, moving the second pick-and-place mechanism 3 and the PP sheet above the second conveying device 2.

[0069] It should be noted that when the PP sheets on the first conveying device 1 are not placed singly but stacked one above the other, the distances from each PP sheet to the first conveying device 1 decrease successively from top to bottom; since during successive adsorption of PP sheets, the distances from the main mounting frame 551 to the first conveying device 1 are the same each time, when adsorbing one PP sheet from the multiple PP sheets stacked one above the other, both sets of the second picking and placing mechanisms 3 will move upward, compressing the first spring 556 and the second spring 557, and the upward movement amount of the second picking and placing mechanism 3 decreases as the distance from the PP sheet to the first conveying device 1 decreases.

[0070] Through the installation mechanism 55 arranged as above, whether the PP sheets conveyed on the first conveying device 1 are conveyed in a single - sheet form or in a multiple - sheet stacked manner, they can be effectively adsorbed by the second picking and placing mechanism 3 in a single - sheet manner, and the problem that the unadsorbed PP sheets in the multiple - sheet stacked state move upward with the adsorbed PP sheets can be avoided.

[0071] As Figure 7 and Figure 8 As shown, the second driving device 8 includes a guide plate 81, an arc rack 82, a gear shaft 83, and a linear rack 84; the guide plate 81 is fan - shaped, the guide plate 81 is fixed on the swing arm 53 and is coaxial with the driving shaft 52, the arc rack 82 is coaxially and slidably sleeved on the end of the guide plate 81 far from the driving shaft 52, the central angle of the arc rack 82 is smaller than the central angle of the guide plate 81, and the guide plate 81 can drive the arc rack 82 to swing in the same direction during the swing of the driving shaft 52. The gear shaft 83 is rotatably installed on the frame body 100, and the gear shaft 83 can mesh with the arc rack 82 and the linear rack 84; when the arc rack 82 swings, it can drive the gear shaft 83 to rotate around its own central axis; by the rotation of the gear shaft 83, the linear rack 84 moves horizontally relative to the guide box 4.

[0072] When the swing arm 53 swings towards the first conveying device 1, the guide plate 81 swings towards the guide box 4, and drives the gear shaft 83 to rotate through the arc rack 82, so that the linear rack 84 moves horizontally towards the guide box 4. On the contrary, when the swing arm 53 swings towards the second conveying device 2, the linear rack 84 moves horizontally away from the guide box 4.

[0073] The linear rack 84 is slidably installed at the end of the support plate 51 facing the second conveying device 2, and the linear rack 84 also meshes with the driving gear 21; by the linear rack 84 moving towards the guide box 4, the driving gear 21 rotates, causing the rollers in the second conveying device 2 to rotate and feeding the PP sheets into the guide box 4.

[0074] It should be noted that the linear rack 84 is composed of two parallel racks connected together, one rack meshes with the gear shaft 83, and the other rack meshes with the driving gear 21.

[0075] like Figure 8 and Figure 9 As shown, the third driving device 9 includes a rocking plate 91, a connecting rod 92, a driving column 93 and a driving groove 94. One end of the connecting rod 92 is rotatably connected to the rocking plate 91 through a shaft, and the other end of the connecting rod 92 is connected and fixed to the driving column 93 movably arranged in the driving groove 94. The driving groove 94 is provided on the linear rack 84 and is arranged along the moving direction of the linear rack 84. When the linear rack 84 moves toward the guide box 4, the linear rack 84 first moves relative to the driving column 93 by means of the driving groove 94, until the linear rack 84 applies a thrust to the driving column 93, drives the driving column 93 to move, pushes the connecting rod 92 to move, and makes the rocking plate 91 swing toward the guide box 4; conversely, when the linear rack 84 moves toward the side away from the guide box 4, the linear rack 84 first moves relative to the driving column 93, and then drives the driving column 93 to move, so that the rocking plate 91 swings toward the side away from the guide box 4.

[0076] Furthermore, the first conveyor roller 41 is a cylindrical structure with small ends and large middle. The second conveyor roller 42 includes a shaft 421 and a conveyor wheel 422 fixedly sleeved on the outer circumferential surface of the shaft 421. A connecting plate 10 is movably sleeved on both end surfaces of the shaft 421, the first conveyor roller 41 is arranged between the two connecting plates 10, and the two ends of the first conveyor roller 41 respectively penetrate and rotatably connect a connecting plate 10. The first conveyor roller 41 is driven to rotate by a driver (such as a motor) installed on a connecting plate 10, and the first conveyor roller 41 and the shaft 421 are connected together through a gear transmission mechanism. The outer circumferential surface with a larger diameter on the first conveyor roller 41 is configured to be tangent to the plane where the upper surface of the PP sheet is located, and the outer circumferential surface of the conveyor wheel 422 is configured to be tangent to the plane where the lower surface of the PP sheet is located, so that the PP sheet can be effectively conveyed when the first conveyor roller 41 and the conveyor wheel 422 rotate in opposite directions.

[0077] A support 11 is movably mounted on the surfaces of both ends of the shaft 421, and both supports 11 are fixed on the frame 100. A limit block 12 and a limit block 2 13 are fixed on the support 11 on the same side as the rocking plate 91; the rocking plate 91 is movably mounted on the first conveying roller 41 and the shaft 421, and is located between the limit block 12 and the limit block 2 13, and the rocking plate 91 can swing around the central axis of the shaft 421.

[0078] The limit block 12 is used to limit the rocking plate 91 after the guide box 4 rotates to a horizontal state, and the limit block 2 13 is used to limit the rocking plate 91 after the guide box 4 rotates to a vertical state.

[0079] The guide box 4 is fixed on two connecting plates 10 .

[0080] By swinging the rocker plate 91 around the central axis of the shaft rod 421, the shaft rod 421 and the first conveying roller 41 are driven to swing, causing the two connecting plates 10 to swing, so that the guiding box 4 swings around the central axis of the shaft rod 421, realizing the switching of the guiding box 4 between the horizontal state and the vertical state.

[0081] In order to make the PP sheet outside the guiding box 4 in a flat or relatively flat state during the process of the guiding box 4 switching from the horizontal state to the vertical state, a support plate 423 is also movably sleeved on the surface of the shaft rod 421. The support plate 423 is used to support the PP sheet. A support rod 424 is installed through the support plate 423. The support rod 424 is connected to and fixed to the connecting plate 10, as Figure 9 shown.

[0082] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PP sheet continuous distribution mechanism for producing accordion bag liners, used for inserting PP sheets into a sheet slot (400) in an accordion bag liners forming device (300), comprising a sheet sending mechanism (200), characterized in that: The sheet sending mechanism (200) comprises: A first conveying device (1) is used to convey a group of PP sheets; A second conveying device (2) is used to convey a single PP sheet; A second pick-and-place mechanism (3) is configured to be able to switch between the first conveying device (1) and the second conveying device (2); the second pick-and-place mechanism (3) sucks the PP sheet in the form of a single piece on the first conveying device (1) and places the PP sheet on the second conveying device (2); The guide box (4) has an inlet and an outlet, and the height of the inner cavity is arranged to be gradually reduced from the inlet to the outlet; the guide box (4) is configured to be switchable between a horizontal state and a vertical state; in the horizontal state, the inlet of the guide box (4) is docked with the unloading port of the second conveying device (2), so that the PP sheet can at least partially enter the guide box (4) through the inlet under the conveyance of the second conveying device (2); in the vertical state, the outlet of the guide box (4) faces the sheet slot (400); The drive shaft (52) is configured to be able to swing back and forth around its own central axis; The second driving device (8) comprises a guide plate (81), an arcuate rack (82), a gear shaft (83) and a linear rack (84); the guide plate (81) is fan-shaped and is coaxially arranged with the driving shaft (52); the arcuate rack (82) is coaxially slidably sleeved on the guide plate (81) at one end away from the driving shaft (52); the guide plate (81) can swing along with the driving shaft (52) and can drive the arcuate rack (82) to swing in the same direction; the gear shaft (83) can mesh with the arcuate rack (82) and the linear rack (84); A third driving device (9), comprising a rocking plate (91), a connecting rod (92), a driving column (93) and a driving groove (94); one end of the connecting rod (92) is rotatably connected to the rocking plate (91) via a shaft, and the other end of the connecting rod (92) is fixedly connected to a driving column (93) movably arranged in the driving groove (94); the driving groove (94) is formed on the linear rack (84) and is arranged along the moving direction of the linear rack (84); The second conveying device (2) is a roller conveyor, and a driving gear (21) meshing with the linear rack (84) is fixedly sleeved on a roller shaft of the roller conveyor; A shaft rod (421) is provided below the entrance of the guide box (4), and the rocking plate (91) is sleeved on the surface of the shaft rod (421) and is connected to the guide box (4).

2. The PP sheet continuous distribution mechanism for producing accordion bag liners according to claim 1, characterized in that: The sheet sending mechanism (200) further comprises a first driving device (5); the first driving device (5) is used to drive the second pick-and-place mechanism (3) to switch between the first conveying device (1) and the second conveying device (2); during the movement of the second pick-and-place mechanism (3) from the second conveying device (2) to the first conveying device (1), the second driving device (8) drives the second conveying device (2) to move, so that the PP sheet enters the entrance of the guide box (4), and then the third driving device (9) drives the guide box (4) to switch from a horizontal state to a vertical state.

3. The PP sheet continuous distribution mechanism for producing accordion bag liners according to claim 2, characterized in that: The first driving device (5) comprises a mounting mechanism (55) and a track groove (511); the track groove (511) is an inverted U-shaped groove; the second pick-and-place mechanism (3) is mounted on the mounting mechanism (55); the driving shaft (52) swings to drive the mounting mechanism (55) to move along the track groove (511) in a state parallel to a horizontal plane.

4. The PP sheet continuous distribution mechanism for producing accordion bag liners according to claim 3, characterized in that: The linear rack (84) is driven to move relative to the guide box (4) by the rotation of the gear shaft (83).

5. The PP sheet continuous dispensing mechanism for producing accordion bag liners according to claim 4, characterized in that: The center angle of the arc-shaped rack (82) is smaller than the center angle of the guide plate (81).

6. The PP sheet continuous distribution mechanism for producing accordion bag liners according to claim 5, characterized in that: The rocking plate (91) swings around the shaft (421) to drive the guide box (4) to switch between a horizontal state and a vertical state.

7. The PP sheet continuous dispensing mechanism for producing accordion bag liners according to claim 6, characterized in that: The sheet material sending mechanism (200) further comprises a supply device (6); the supply device (6) comprises at least one carrier (61), and at least one PP sheet material can be stacked on the carrier (61); the sheets on the same carrier (61) are arranged as a group.

8. The PP sheet continuous dispensing mechanism for producing accordion bag liners according to claim 7, characterized in that: The sheet sending mechanism (200) further comprises a first pick-and-place mechanism (7); the first pick-and-place mechanism (7) is configured to be switchable between the supply device (6) and the first conveying device (1) so as to transfer a group of PP sheets to the first conveying device (1).

9. The PP sheet continuous dispensing mechanism for producing accordion bag liners according to claim 8, characterized in that: It also includes a frame (100); the frame (100) is used to support the sheet sending mechanism (200); the frame (100) is configured to be able to slide relative to the accordion bag liner forming device (300) in the length direction of the accordion bag liner forming device (300).

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