Folding machine for forming inward folded paper tails at tops of paper stacks and paper tail folding mechanism

Abstract

The utility model discloses a folding machine for forming an inward folded paper tail at the top of a paper stack and a paper tail folding mechanism, and relates to the technical field of tissue folding machinery. The paper tail folding mechanism is arranged on one side of the paper stack forming channel below the folding roller in a lifting mode, the paper blowing piece is arranged on the other side of the paper stack forming channel, and when the bearing claw drives the stacked paper stack to be separated from the paper stack which is being stacked on the separating claw, the paper blowing piece blows the half paper on the uppermost layer of the paper stack on the bearing claw to the paper tail folding assembly. The paper tail folding assembly conducts paper tail inward folding and resets after paper tail inward folding is completed. The paper tail folding assembly and the paper blowing piece are integrated on the two sides of the paper stack forming channel below the folding roller, the paper stack on the paper support bearing piece is separated from the paper stack on the separating claw, it is ensured that the paper tail folding assembly only adsorbs one piece of paper towel on the uppermost face of the paper stack on the bearing claw, the situation that multiple pieces of paper towel are adsorbed is avoided, and the paper towel production efficiency is improved. The adsorption success rate and the paper tail inward folding success rate are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to paper towel folding machine technical field, more specifically to a folding machine and paper tail folding mechanism that form inside folding paper tail in paper stack top. BACKGROUND

[0002] For the finished product folding paper towel, the paper tail of the uppermost paper towel of the whole stack of paper towel is required to be folded inward to form an inside folding paper tail, so as to facilitate the user to extract the first folded paper towel. The existing folding machine is all equipped with a separate folding device to fold the paper tail of the uppermost paper towel of the paper stack output from the folding machine.

[0003] For example, the utility model patent with the authorized announcement number CN205257629U and the authorized announcement date of May 25, 2016, and the name of "folding machine for forming inside folding paper tail in paper stack top" includes a paper stack supporting seat, which supports the paper stack output from two folding rollers, which is stacked by a plurality of paper towels folded in turn and buckled. The folding machine is also provided with a movable suction cup, which can be moved to the top of the paper stack supported by the paper stack supporting seat and suck the uppermost paper of the paper stack. The movable suction cup can rotate, so that the paper sucked by the movable suction cup is lifted up, the suction position of the movable suction cup on the paper deviates from the paper tail of the paper, so that the paper tail of the lifted paper droops, and the folding machine is also provided with a bending mechanism for bending the drooping paper tail inward.

[0004] For example, the invention patent application with the application publication number CN119036940A and the application publication date of November 29, 2024, and the name of "paper towel inside folding mechanism" includes a folding plate, a suction piece and a top pressing piece. The suction piece corresponds to the upper and lower of the end close to the folding edge of the first paper towel, the bottom surface of the suction piece is a suction surface, and the suction piece is provided with a through hole for the top pressing piece to pass through. The folding plate is arranged at the end close to the side edge of the first paper towel, and the folding plate swings relative to the suction surface of the suction piece and can hold the top pressing piece. The top pressing piece is arranged at the end close to the folding edge and can be raised and lowered relative to the suction piece. During the inside folding, the end close to the folding edge of the first paper towel is adsorbed by the suction piece, and the other end of the first paper towel is naturally drooped. Then the folding plate swings towards the suction surface of the suction piece, pushes the drooped first paper towel to fold and adhere to the adsorbed end. Then the top pressing piece passes through the through hole to press the first paper towel after inside folding, so that the surface part and the inside folded part of the first paper towel are pressed together to maintain the inside folded state.

[0005] The above-mentioned prior art can form an inside folding paper tail at the top of the paper stack, which is to fold the uppermost paper of the paper stack when the paper stack leaves the folding roller and the uppermost layer of the paper stack is in a horizontal state (from the description of CN205257629U Figure 1 and the description of CN119036940AFigure 2 The above two structural modes of the prior art are prone to sucking multiple sheets of paper, which affects the folding operation of the top sheet of the paper stack. Technical problems

[0006] In order to overcome the defects and deficiencies in the prior art, the utility model provides a folding machine and a paper tail folding mechanism for forming an inner folded paper tail at the top of a paper stack, and the purpose of the utility model is to solve the problem that the structure for forming an inner folded paper tail at the top of a paper stack in the prior art is prone to sucking multiple sheets of paper, which affects the folding operation of the top sheet of the paper stack. The paper tail folding mechanism is arranged on one side of the paper stack forming channel below the folding roller, and a paper blowing member is arranged on the other side. When the completed stack on the receiving claw is separated from the stack being stacked on the separating claw, the paper blowing member blows the top half sheet of the stack on the receiving claw towards the paper tail folding assembly, the paper tail folding assembly performs paper tail folding, and resets after completing the paper tail folding. The paper tail folding assembly and the paper blowing member are integrated on both sides of the paper stack forming channel below the folding roller, and the action of separating the stack on the paper supporting member from the stack on the separating claw ensures that the paper tail folding assembly only sucks the top sheet of the stack on the receiving claw, avoids the occurrence of sucking multiple sheets, and ensures the success rate of suction and the success rate of paper tail folding.

[0007] In order to solve the problems in the prior art, the utility model is realized by the following technical scheme.

[0008] The utility model discloses a folding machine for forming an inner folded paper tail at the top of a paper stack, which comprises a pair of folding rollers, a separating claw and a receiving claw. The separating claw is used for separating the paper stack, and the receiving claw is used for receiving the paper stack. The movement channel of the receiving claw after receiving the paper stack is a paper stack forming channel.

[0009] A paper tail folding mechanism is arranged on one side of the paper stack forming channel, and a paper blowing member is arranged on the other side. When the completed stack on the receiving claw is separated from the stack being stacked on the separating claw, the paper blowing member blows the top half sheet of the stack on the receiving claw towards the paper tail folding assembly, the paper tail folding assembly performs paper tail folding, and resets after completing the paper tail folding. The paper tail folding assembly and the paper blowing member are integrated on both sides of the paper stack forming channel below the folding roller, and the action of separating the stack on the paper supporting member from the stack on the separating claw ensures that the paper tail folding assembly only sucks the top sheet of the stack on the receiving claw, avoids the occurrence of sucking multiple sheets, and ensures the success rate of suction and the success rate of paper tail folding.

[0010] Further preferably, the paper tail folding mechanism is assembled on the paper tail folding lifting mechanism.

[0011] Further preferably, the paper tail folding mechanism is synchronized with the descending of the receiving claw when the receiving claw descends after the paper stack on the receiving claw is set to a specified number of sheets, and is reset after the inner folding of the top half sheet of the paper stack on the receiving claw is completed.

[0012] Further preferably, the paper tail folding mechanism comprises a sheet suction plate, a paper tail folding piece, a turnover driving member, and an inner folding driving member; the turnover driving member drives the sheet suction plate, the paper tail folding piece, and the inner folding driving member to rotate around a first rotation axis; the inner folding driving member drives the paper tail folding piece to rotate around a second rotation axis relative to the sheet suction plate; the sheet suction plate is provided with negative pressure suction holes for suctioning the sheet.

[0013] Further preferably, the paper tail folding piece is a bending member with a specified bending angle, and in the initial state, the paper tail folding piece is hidden on the side of the sheet suction plate; after the sheet suction plate suctions the top half sheet of the paper stack on the receiving claw, the turnover driving member drives the sheet suction plate and the paper tail folding piece to turn over toward the paper stack, and after the turnover is set to a specified angle, the inner folding driving member drives the paper tail folding piece to rotate around the second rotation axis relative to the sheet suction plate, and the paper tail folding piece folds the part of the sheet that is not suctioned inward; after the folding, the paper tail folding piece is reset relative to the sheet suction plate, and the turnover driving member continues to drive the sheet suction plate and the paper tail folding piece to turn over toward the paper stack until the half sheet that is completed to be folded is pressed on the paper stack.

[0014] Further preferably, the paper tail folding mechanism further comprises a lifting mounting base, and the sheet suction plate, the paper tail folding piece, the turnover driving member, and the inner folding driving member are all assembled on the lifting mounting base, and the lifting mounting base is connected with the paper tail folding lifting mechanism.

[0015] Further preferably, the paper tail folding mechanism further comprises a first rotation base, the first rotation base is assembled on the lifting mounting base through a first rotation axis, the sheet suction plate, the paper tail folding piece, and the inner folding driving member are all assembled on the first rotation base, the turnover driving member is arranged on the lifting mounting base, the turnover driving member is connected with the first rotation base, and drives the first rotation base to rotate around the first rotation axis.

[0016] Further preferably, the second rotation axis is rotatably assembled on the first rotation base, the paper tail folding piece is fixed on the second rotation axis, the inner folding driving member is connected with the second rotation axis, and drives the second rotation axis to rotate.

[0017] Further preferably, the paper blowing member is assembled on the air blowing lifting mechanism.

[0018] Further preferably, the paper blowing member stops blowing air when the paper tail folding mechanism suctions the top half sheet of the paper stack on the receiving claw and performs the inner folding operation.

[0019] Further preferably, the paper blowing piece moves to below the separating claw when the receiving claw lifts to receive the paper stack stacked on the separating claw, and blows the half paper hanging below the separating claw to a horizontal state.

[0020] The paper tail folding mechanism provided in the second aspect of the utility model comprises a paper adsorption plate, a paper tail folding piece, a turnover driving part and an inner folding driving part; the turnover driving part drives the paper adsorption plate, the paper tail folding piece and the inner folding driving part to rotate around a first rotation shaft; the inner folding driving part drives the paper tail folding piece to rotate around a second rotation shaft relative to the paper adsorption plate; the paper adsorption plate is provided with negative pressure adsorption holes for adsorbing paper.

[0021] Further preferably, the paper tail folding piece is a bending piece with a bending angle, in the initial state, the paper tail folding piece is hidden on the side of the paper adsorption plate, after the paper adsorption plate adsorbs the uppermost half paper on the paper stack on the receiving claw, the turnover driving part drives the paper adsorption plate and the paper tail folding piece to turn over to the direction of the paper stack, after turning over by a set angle, the inner folding driving part drives the paper tail folding piece to rotate around the second rotation shaft relative to the paper adsorption plate, and the paper tail folding piece folds the part of the paper not adsorbed inward; after folding, the paper tail folding piece is reset relative to the paper adsorption plate, the turnover driving part continues to drive the paper adsorption plate and the paper tail folding piece to turn over to the direction of the paper stack, and is reset after the half paper that has been folded inward is pressed on the paper stack.

[0022] Further preferably, the paper tail folding mechanism further comprises a lifting mounting base, the paper adsorption plate, the paper tail folding piece, the turnover driving part and the inner folding driving part are all assembled on the lifting mounting base, and the lifting mounting base is connected with the paper tail folding lifting mechanism.

[0023] Further preferably, the paper tail folding mechanism further comprises a first rotation base, the first rotation base is rotatably assembled on the lifting mounting base through a first rotation shaft, the paper adsorption plate, the paper tail folding piece and the inner folding driving part are all assembled on the first rotation base, the turnover driving part is arranged on the lifting mounting base, the turnover driving part is connected with the first rotation base and drives the first rotation base to rotate around the first rotation shaft.

[0024] Further preferably, the second rotation shaft is rotatably assembled on the first rotation base, the paper tail folding piece is fixed on the second rotation shaft, the inner folding driving part is connected with the second rotation shaft and drives the second rotation shaft to rotate.

[0025] Compared with the prior art, the utility model has the beneficial technical effects that:

[0026] 1. The paper tail folding assembly and the paper blowing piece are integrated on both sides of the paper stack forming channel below the folding roller, the action of separating the paper stack on the paper supporting piece from the paper stack on the separating claw is utilized, the paper tail folding assembly only adsorbs the uppermost paper towel on the paper stack on the receiving claw, the condition of adsorbing multiple papers is avoided, and the success rate of adsorption and the success rate of inner folding of the paper tail are ensured.

[0027] 2、The paper tail folding mechanism is assembled on the paper tail folding lifting mechanism, so that the paper tail folding mechanism has the ability to lift up and down, can keep synchronous action with the receiving claw, and can perform the operation of folding the paper tail inward during the movement of the receiving claw, without affecting the efficiency of the receiving claw outputting the paper stack.

[0028] 3、The paper tail folding mechanism of the utility model can adopt the paper tail folding structure of the prior art, such as the movable suction disc structure and the bending mechanism structure in CN205257629U; it can also be the paper towel folding mechanism structure in CN119036940A; when the existing structure is adopted, the initial state needs to be adjusted to the vertical state. However, preferably, the utility model provides a paper tail folding mechanism, which is more conducive to being assembled on the paper stack forming channel side compared with the paper tail folding structure in the prior art, has simple structure, high integration, does not interfere with the separating claw and the receiving claw, and is conducive to the space layout below the folding roller.

[0029] 4、The paper tail folding mechanism provided by the utility model adopts two rotating shafts, avoids interference between the paper tail folding piece and the paper sheet suction plate and the uppermost half paper of the paper stack, has high structural integration, and is conducive to saving the occupied space of the paper tail folding mechanism. The space below the folding roller is relatively cramped, and the paper tail folding mechanism provided by the utility model can be stably assembled below the folding roller and stably run.

[0030] 5、The paper blowing piece is assembled on the air blowing lifting mechanism, so that the paper blowing piece has the freedom of moving up and down, on the one hand, the position of the paper blowing piece can be adjusted when the number of stacked paper stacks changes (the height of the paper stack changes), and on the other hand, the paper blowing piece has a following function, so that when the receiving claw descends, the paper blowing piece can blow out gas to act on the uppermost half paper of the paper stack on the receiving claw, and the paper tail folding mechanism can be adsorbed to the paper.

[0031] 6、After the paper blowing piece has the freedom of moving up and down, the paper blowing piece can blow out gas to act on the lower half paper of the separating piece, so that the half paper remains horizontal, and when the receiving claw receives the paper stack on the separating claw, the lowermost half paper of the paper stack is also in a horizontal state. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a schematic view of the folding machine receiving claw receiving the paper stack separating claw inserted into the paper stack forming channel to separate the paper stack;

[0033] Figure 2 It is a schematic view of the paper blowing piece of the folding machine blowing the uppermost half paper of the paper stack on the receiving claw to the paper tail folding mechanism and being adsorbed by the paper tail folding mechanism;

[0034] Figure 3The utility model discloses a folding machine paper tail folding mechanism flip set angle's schematic diagram.

[0035] Figure 4 The utility model discloses a folding machine paper tail folding mechanism will half paper inside folding's schematic diagram.

[0036] Figure 5 The utility model discloses a folding machine paper tail folding mechanism completes paper tail inside folding and presses down paper tail's schematic diagram.

[0037] Figure 6 The utility model discloses a folding machine paper tail folding mechanism completes paper tail inside folding and presses down paper tail's schematic diagram.

[0038] Figure 7 The utility model discloses a folding machine paper tail folding mechanism is in the initial position's structure schematic diagram.

[0039] Figure 8 The utility model discloses a folding machine paper tail folding mechanism flip set angle's structure schematic diagram.

[0040] Figure 9 The utility model discloses a folding machine paper tail folding mechanism paper tail fold piece flip's structure schematic diagram.

[0041] Figure 10 The utility model discloses a folding machine paper tail folding mechanism paper tail fold piece flip's structure schematic diagram.

[0042] Fig. 1, folding roller, 2, separating claw, 3, receiving claw, 4, paper stack formation channel, 5, paper tail folding mechanism, 6, paper blowing piece, 7, paper suction plate, 8, paper tail fold piece, 9, flip drive, 10, inside folding drive, 11, negative pressure suction hole, 12, first rotating shaft, 13, second rotating shaft, 14, lifting mounting seat, 15, first rotating seat. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the utility model specification. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0044] Embodiment 1

[0045] As a preferred embodiment of the utility model, referring to the drawings in the specification Figure 1 -attached Figure 6As shown, the embodiment discloses a folding machine for forming an inner folded paper tail on the top of a paper stack, which comprises a pair of folding rollers 1, a separating claw 2 for separating the paper stack, and a receiving claw 3 for receiving the paper stack, wherein the moving path of the receiving claw 3 after receiving the paper stack forms a paper stack forming path 4;

[0046] A paper tail folding mechanism 5 is arranged on one side of the paper stack forming path 4, and a paper blowing device 6 is arranged on the other side of the paper stack forming path 4; when the paper stack received on the receiving claw 3 is stacked to a set number, the separating claw 2 is inserted into the paper stack forming path 4 to receive the paper falling from the folding rollers 1; the receiving claw 3 moves downward, so that the uppermost half paper on the paper stack on the receiving claw 3 is separated from the lowermost half paper on the separating claw 2; at this time, the paper blowing device 6 is started to blow the uppermost half paper on the paper stack on the receiving claw 3 to the paper tail folding mechanism 5, the paper tail folding mechanism 5 adsorbs the uppermost half paper on the paper stack on the receiving claw 3 to perform an inner folding action, and presses the half paper after the inner folding on the paper stack on the receiving claw 3.

[0047] Referring to the drawings Figure 1 As shown, in the initial state, as the height of the paper stack is increased, the receiving claw 3 gradually descends, so that the uppermost paper on the paper stack on the receiving claw 3 always remains unchanged relative to the height of the folding rollers 1; at this time, the paper tail folding mechanism 5 is located on one side of the paper stack forming path 4, and does not interfere with the paper stack forming path 4, and does not affect the stacking of the paper stack on the receiving claw 3; when the paper stack on the receiving claw 3 is stacked to a set number, the separating claw 2 is inserted into the paper stack forming path 4, and the paper falling from the folding rollers 1 is stacked on the separating claw 2, and the separating claw 2 keeps descending synchronously with the receiving claw 3.

[0048] When the separating claw 2 is stacked with a set number of papers, or after the separating claw 2 is inserted into the paper stack forming path 4 to stably receive the paper falling from the folding rollers 1, the receiving claw 3 accelerates to descend, so that there is a descending speed difference between the receiving claw 3 and the separating claw 2, and the descending speed of the receiving claw 3 is greater than that of the separating claw 2, at this time, the receiving claw 3 and the separating claw 2 are separated by a certain distance, referring to the drawings Figure 2 As shown, the uppermost half paper on the paper stack on the receiving claw 3 is gradually separated from the lowermost half paper on the paper stack on the separating claw 2, and since the two are in a folded state, when separated, the uppermost half paper on the paper stack on the receiving claw 3 will form an angle with the horizontal line with the lowermost half paper on the paper stack on the separating claw 2, at this time, the paper blowing device 6 is started to blow the uppermost half paper on the paper stack on the receiving claw 3 to the paper tail folding mechanism 5, and the paper tail folding mechanism 5 adsorbs the half paper; at this time, the function of the paper blowing device 6 is to change the posture of the uppermost half paper on the paper stack on the receiving claw 3.

[0049] As an example of the embodiment, when the paper tail folding mechanism 5 adsorbs the uppermost half sheet of the paper stack on the receiving claw 3, the receiving claw 3 can stop moving and pause at the station, and then continue to descend after the paper tail folding mechanism 5 completes the inner folding of the paper tail.

[0050] As another example of the embodiment, the paper tail folding mechanism 5 is assembled on the paper tail folding lifting mechanism, and the paper tail folding mechanism 5 descends synchronously with the receiving claw 3 when the receiving claw 3 descends, and resets after completing the inner folding of the uppermost half sheet of the paper stack on the receiving claw 3. In the two examples, the scheme that the paper tail folding mechanism 5 can descend synchronously with the receiving claw 3 is beneficial to save time, improve the paper tail folding efficiency, and avoid the waiting of the receiving claw 3.

[0051] As an example of the embodiment, the paper tail folding mechanism 5 in the embodiment is the structure of the movable suction disc and the bending mechanism in CN205257629U; and can also be the structure of the paper towel inner folding mechanism in CN119036940A.

[0052] Embodiment 2

[0053] As another preferred embodiment of the utility model, the embodiment is a further detailed supplement and elaboration of the technical scheme of the utility model based on the above-mentioned embodiment 1. In the embodiment, a paper tail folding mechanism 5 is provided, which is more beneficial to be assembled on the side of the paper stack forming channel 4 than the paper tail inner folding structure in the prior art, has a simple structure, high integration, and will not interfere with the separating claw 2 and the receiving claw 3, and is beneficial to the space layout below the folding roller 1.

[0054] Specifically, the paper tail folding mechanism 5 comprises a paper sheet adsorption plate 7, a paper tail folding piece 8, a turnover driving part 9 and an inner folding driving part 10; the turnover driving part 9 drives the paper sheet adsorption plate 7, the paper tail folding piece 8 and the inner folding driving part 10 to rotate around a first rotation shaft 12; the inner folding driving part 10 drives the paper tail folding piece 8 to rotate around a second rotation shaft 13 relative to the paper sheet adsorption plate 7; and the paper sheet adsorption plate 7 is provided with negative pressure adsorption holes 11 for adsorbing paper sheets.

[0055] As shown in the accompanying drawings of the specification, Figure 3 As shown in the accompanying drawings of the specification, after the paper sheet adsorption plate 7 in the paper tail folding mechanism 5 adsorbs the uppermost half sheet of the paper stack on the receiving claw 3, the turnover driving part 9 drives the paper sheet adsorption plate 7, the paper tail folding piece 8 and the inner folding driving part 10 to rotate around the first rotation shaft 12 together. Figure 4 As shown in the accompanying drawings of the specification, after rotating by a set angle, the inner folding driving part 10 acts to drive the paper tail folding piece 8 to rotate around the second rotation shaft 13 relative to the paper sheet adsorption plate 7, the paper tail folding piece 8 extends from one side of the paper sheet adsorption plate 7, and folds the part of the paper sheet not adsorbed to the part adsorbed by the paper sheet adsorption plate 7.

[0056] Referring to the drawings Figure 5 As shown, after the inner folding of the paper tail is completed, the inner folding driving member 10 drives the paper tail folding piece 8 to reset, i.e. to turn to the side of the paper suction plate 7 and hide at the side of the paper suction plate 7; the turnover driving member 9 continues to drive the paper suction plate 7, the paper tail folding piece 8 and the inner folding driving member 10 to rotate together around the first rotating shaft 12, and press the inner folded paper tail on the paper stack, thus completing the inner folding operation of the uppermost half paper of the paper stack.

[0057] Referring to the drawings Figure 6 As shown, after the inner folding operation of the uppermost half paper of the paper stack is completed, the turnover driving member 9 drives the paper suction plate 7, the paper tail folding piece 8 and the inner folding driving member 10 to reset by reversing the rotation around the first rotating shaft 12.

[0058] During the above process, the paper tail folding mechanism 5 is kept to descend synchronously with the receiving claw 3 under the driving of the paper tail folding lifting mechanism.

[0059] As an example of the present embodiment, in order to ensure the success rate of the inner folding of the paper tail by the paper tail folding piece 8 and to avoid interference with the paper stack, the paper tail folding piece 8 is a bending member with a bending angle, and in the initial state, the paper tail folding piece 8 is hidden at the side of the paper suction plate 7; after the paper suction plate 7 adsorbs the uppermost half paper of the paper stack on the receiving claw 3, the turnover driving member 9 drives the paper suction plate 7 and the paper tail folding piece 8 to turn over in the direction of the paper stack, and after the turning over is set to a certain angle, the inner folding driving member 10 drives the paper tail folding piece 8 to rotate relative to the paper suction plate 7 around the second rotating shaft 13, and the paper tail folding piece 8 folds the part of the paper not adsorbed inward; after the folding, the paper tail folding piece 8 resets relative to the paper suction plate 7, and the turnover driving member 9 continues to drive the paper suction plate 7 and the paper tail folding piece 8 to turn over in the direction of the paper stack until the half paper after the inner folding is reset on the paper stack.

[0060] As another example of the present embodiment, in order to ensure the structural stability and operational stability of the paper tail folding mechanism 5, the paper tail folding mechanism 5 further comprises a lifting mounting seat 14, and the paper suction plate 7, the paper tail folding piece 8, the turnover driving member 9 and the inner folding driving member 10 are all assembled on the lifting mounting seat 14, and the lifting mounting seat 14 is connected with the paper tail folding lifting mechanism.

[0061] The paper tail folding mechanism 5 further comprises a first rotating seat 15, which is rotatably assembled on the lifting mounting seat 14 through the first rotating shaft 12, and the paper suction plate 7, the paper tail folding piece 8 and the inner folding driving member 10 are all assembled on the first rotating seat 15, the turnover driving member 9 is arranged on the lifting mounting seat 14, the turnover driving member 9 is connected with the first rotating seat 15, and drives the first rotating seat 15 to rotate around the first rotating shaft 12.

[0062] The second rotating shaft 13 is rotatably arranged on the first rotating seat 15, the paper tail flap 8 is fixed on the second rotating shaft 13, the inner folding driving member 10 is connected with the second rotating shaft 13, and the second rotating shaft 13 is driven to rotate.

[0063] Embodiment 3

[0064] As another preferable embodiment of the utility model, the embodiment is based on the above-mentioned embodiment 1 or embodiment 2, and further detailed supplement and elaboration are made to the technical scheme of the utility model. Figure 1 -attached Figure 6 As shown in the drawings, the paper blowing member 6 is arranged on the air blowing lifting mechanism (not shown in the drawings). The paper blowing member 6 stops blowing when it adsorbs the uppermost half paper of the paper stack on the receiving claw 3 and performs the inner folding operation. When the receiving claw 3 lifts the paper stack stacked on the separating claw 2, the paper blowing member 6 moves to the lower part of the separating claw 2 and blows the half paper hanging below the separating claw 2 to the horizontal state.

[0065] In the embodiment, the paper blowing member 6 is arranged on the air blowing lifting mechanism, so that the paper blowing member 6 has the freedom of moving up and down. On the one hand, the position of the paper blowing member 6 can be adjusted when the number of stacked papers changes (the height of the paper stack changes), and on the other hand, the paper blowing member 6 has the following function: when the receiving claw 3 descends, the paper blowing member 6 can blow air to the uppermost half paper of the paper stack on the receiving claw 3, so as to ensure that the paper tail folding mechanism 5 can be adsorbed to the paper. After the paper blowing member 6 has the freedom of moving up and down, air can be blown to the half paper hanging below the lower layer of the separating member, so as to keep it horizontal. When the receiving claw 3 receives the paper stack on the separating claw 2, the half paper at the lowermost layer of the paper stack is also in the horizontal state.

[0066] Embodiment 4

[0067] As another preferable embodiment of the utility model, the embodiment provides a paper tail folding mechanism 5. Compared with the paper tail folding mechanism 5 in the prior art, the paper tail folding mechanism 5 has high structural integration degree and high space utilization rate, and is more conducive to being arranged in the space below the folding roller 1. Figure 7 -attached Figure 10 As shown in the drawings, the paper tail folding mechanism 5 comprises a paper adsorption plate 7, a paper tail flap 8, a turnover driving member 9 and an inner folding driving member 10. The turnover driving member 9 drives the paper adsorption plate 7, the paper tail flap 8 and the inner folding driving member 10 to rotate around the first rotating shaft 12. The inner folding driving member 10 drives the paper tail flap 8 to rotate around the second rotating shaft 13 relative to the paper adsorption plate 7. The paper adsorption plate 7 is provided with negative pressure adsorption holes 11 for adsorbing paper.

[0068] The paper tail folding piece 8 is a bending piece with a bending setting arc. In the initial state, the paper tail folding piece 8 is hidden at the side of the paper suction plate 7. After the paper suction plate 7 adsorbs the uppermost half paper sheet on the paper stack on the receiving claw 3, the turnover driving member 9 drives the paper suction plate 7 and the paper tail folding piece 8 to turn over in the direction of the paper stack. After the turnover setting angle is reached, the inner folding driving member 10 drives the paper tail folding piece 8 to rotate relative to the paper suction plate 7 around the second rotating shaft 13, and the paper tail folding piece 8 folds the part of the paper sheet not adsorbed inward. After folding, the paper tail folding piece 8 is reset relative to the paper suction plate 7, and the turnover driving member 9 continues to drive the paper suction plate 7 and the paper tail folding piece 8 to turn over in the direction of the paper stack until the half paper sheet after the inner folding is reset on the paper stack.

[0069] The paper tail folding mechanism 5 further comprises a lifting mounting seat 14, and the paper suction plate 7, the paper tail folding piece 8, the turnover driving member 9 and the inner folding driving member 10 are all assembled on the lifting mounting seat 14. The lifting mounting seat 14 is connected with a paper tail folding lifting mechanism (not shown in the figure).

[0070] The paper tail folding mechanism 5 further comprises a first rotating seat 15, which is rotatably assembled on the lifting mounting seat 14 through a first rotating shaft 12. The paper suction plate 7, the paper tail folding piece 8 and the inner folding driving member 10 are all assembled on the first rotating seat 15. The turnover driving member 9 is arranged on the lifting mounting seat 14, and the turnover driving member 9 is connected with the first rotating seat 15 to drive the first rotating seat 15 to rotate around the first rotating shaft 12.

[0071] The second rotating shaft 13 is rotatably assembled on the first rotating seat 15. The paper tail folding piece 8 is fixed on the second rotating shaft 13. The inner folding driving member 10 is connected with the second rotating shaft 13 to drive the second rotating shaft 13 to rotate.

[0072] As an example, the turnover driving member 9 and the inner folding driving member 10 described above can both adopt a gas cylinder or a servo motor as a driving execution component.

Claims

1. A folding machine for forming an inner folded paper tail on the top of a paper stack, comprising a pair of folding rollers (1), a separating claw (2) for separating the paper stack and a receiving claw (3) for receiving the paper stack, the moving path of the receiving claw (3) after receiving the paper stack forms a paper stack forming path (4); characterized in that: a paper tail folding mechanism (5) is arranged on one side of the paper stack forming path (4), and a paper blowing device (6) is arranged on the other side of the paper stack forming path (4); when the paper stack received on the receiving claw (3) is stacked to a set number of sheets, the separating claw (2) is inserted into the paper stack forming path (4) to receive the paper sheet falling from the folding roller (1); the receiving claw (3) moves downward, so that the uppermost half sheet on the paper stack on the receiving claw (3) is separated from the lowermost half sheet of the separating claw (2); at this time, the paper blowing device (6) is started to blow the uppermost half sheet on the paper stack on the receiving claw (3) to the paper tail folding mechanism (5), the paper tail folding mechanism (5) adsorbs the uppermost half sheet on the paper stack on the receiving claw (3) to perform an inner folding action, and presses the half sheet after the inner folding on the paper stack on the receiving claw (3). The paper tail folding mechanism (5) is assembled on a paper tail folding lifting mechanism.

2. The folding machine that forms the inner tuck tail at the top of the paper stack according to claim 1, characterized in that: When the paper stack on the receiving claw (3) is stacked to a set number of sheets, the paper tail folding mechanism (5) descends synchronously with the receiving claw (3) when the receiving claw (3) descends, and resets after completing the inner folding of the uppermost half sheet of the paper stack on the receiving claw (3).

3. The folding machine that forms the inner tuck tail at the top of the paper stack according to claim 2, characterized in that: The paper tail folding mechanism (5) comprises a paper sheet adsorption plate (7), a paper tail folding piece (8), a turnover driving member (9) and an inner folding driving member (10); the turnover driving member (9) drives the paper sheet adsorption plate (7), the paper tail folding piece (8) and the inner folding driving member (10) to rotate around a first rotation shaft (12); the inner folding driving member (10) drives the paper tail folding piece (8) to rotate around a second rotation shaft (13) relative to the paper sheet adsorption plate (7); the paper sheet adsorption plate (7) is provided with negative pressure adsorption holes (11) for adsorbing paper sheets.

4. A folding machine for forming a tuck at the top of a paper stack as claimed in any one of claims 1 to 3, characterized in that: The paper tail folding piece (8) is a bending member with a bending angle, in the initial state, the paper tail folding piece (8) is hidden on the side of the paper sheet adsorption plate (7), after the paper sheet adsorption plate (7) adsorbs the uppermost half sheet of the paper stack on the receiving claw (3), the turnover driving member (9) drives the paper sheet adsorption plate (7) and the paper tail folding piece (8) to turn over to the direction of the paper stack, after turning over by a set angle, the inner folding driving member (10) drives the paper tail folding piece (8) to rotate around the second rotation shaft (13) relative to the paper sheet adsorption plate (7), the paper tail folding piece (8) folds the part of the paper sheet not adsorbed inwardly; after folding, the paper tail folding piece (8) resets relative to the paper sheet adsorption plate (7), the turnover driving member (9) continues to drive the paper sheet adsorption plate (7) and the paper tail folding piece (8) to turn over to the direction of the paper stack, until the half sheet after the inner folding is pressed on the paper stack, and then resets.

5. The folding machine that forms the inner tuck tail at the top of the paper stack according to claim 4, characterized in that: ​ 6. The folding machine that forms the inner tuck tail at the top of the paper stack according to claim 4, characterized in that: The paper tail folding mechanism (5) further comprises a lifting mounting base (14), the paper suction plate (7), the paper tail folding piece (8), the turnover driving element (9) and the inner folding driving element (10) are all assembled on the lifting mounting base (14), and the lifting mounting base (14) is connected with the paper tail folding lifting mechanism.

7. The folding machine that forms the inner tuck tail at the top of the paper stack according to claim 6, characterized in that: The paper tail folding mechanism (5) further comprises a first rotating base (15), the first rotating base (15) is rotatably assembled on the lifting mounting base (14) through a first rotating shaft (12), the paper suction plate (7), the paper tail folding piece (8) and the inner folding driving element (10) are all assembled on the first rotating base (15), the turnover driving element (9) is arranged on the lifting mounting base (14), the turnover driving element (9) is connected with the first rotating base (15), and the first rotating base (15) is driven to rotate around the first rotating shaft (12).

8. The folding machine that forms the inner tuck tail at the top of the paper stack according to claim 7, characterized in that: The second rotating shaft (13) is rotatably assembled on the first rotating base (15), the paper tail folding piece (8) is fixed on the second rotating shaft (13), the inner folding driving element (10) is connected with the second rotating shaft (13), and the second rotating shaft (13) is driven to rotate.

9. A folding machine for forming a tuck at the top of a stack of paper as claimed in any one of claims 1 to 3, wherein: The paper blowing element (6) is assembled on the air blowing lifting mechanism.

10. The folding machine that forms the inner tuck tail at the top of the paper stack according to claim 9, characterized in that: When the paper tail folding mechanism (5) adsorbs the uppermost half paper on the paper stack on the receiving claw (3) and performs the inner folding operation, the paper blowing element (6) stops blowing air.

11. The folding machine that forms an inner tuck tail at the top of a paper stack of claim 9, wherein: When the receiving claw (3) rises to receive the paper stack on the separating claw (2), the paper blowing element (6) moves to below the separating claw (2) and blows the half paper falling below the separating claw (2) to a horizontal state.

12. Paper tail folding mechanism (5), characterized in that: The paper tail folding mechanism (5) comprises a paper suction plate (7), a paper tail folding piece (8), a turnover driving element (9) and an inner folding driving element (10), the turnover driving element (9) drives the paper suction plate (7), the paper tail folding piece (8) and the inner folding driving element (10) to rotate around a first rotating shaft (12), the inner folding driving element (10) drives the paper tail folding piece (8) to rotate around a second rotating shaft (13) relative to the paper suction plate (7), and a negative pressure suction hole (11) for adsorbing paper is arranged on the paper suction plate (7).

13. The paper tail folding mechanism (5) according to claim 12, characterized in that: The paper tail folding piece (8) is a bending element with a set bending radius, in an initial state, the paper tail folding piece (8) is hidden on the side of the paper suction plate (7), after the paper suction plate (7) adsorbs the uppermost half paper on the paper stack on the receiving claw (3), the turnover driving element (9) drives the paper suction plate (7) and the paper tail folding piece (8) to turn over to the paper stack direction, after turning over by a set angle, the inner folding driving element (10) drives the paper tail folding piece (8) to rotate around the second rotating shaft (13) relative to the paper suction plate (7), and the paper tail folding piece (8) folds the part of the paper not adsorbed inward, after folding, the paper tail folding piece (8) is reset relative to the paper suction plate (7), the turnover driving element (9) continues to drive the paper suction plate (7) and the paper tail folding piece (8) to turn over to the paper stack direction, and is reset after the half paper after the inner folding is completed is pressed on the paper stack.

14. The paper tail folding mechanism (5) according to claim 12 or 13, characterized in that: The paper tail folding mechanism (5) further comprises a lifting mounting base (14), the paper suction plate (7), the paper tail folding piece (8), the turnover driving element (9) and the inner folding driving element (10) are all assembled on the lifting mounting base (14), and the lifting mounting base (14) is connected with the paper tail folding lifting mechanism.

15. The paper tail folding mechanism (5) according to claim 14, characterized in that: The paper tail folding mechanism (5) further comprises a first rotating base (15), the first rotating base (15) is rotatably assembled on the lifting mounting base (14) through a first rotating shaft (12), the paper suction plate (7), the paper tail folding piece (8) and the inner folding driving element (10) are all assembled on the first rotating base (15), the turnover driving element (9) is arranged on the lifting mounting base (14), the turnover driving element (9) is connected with the first rotating base (15), and the first rotating base (15) is driven to rotate around the first rotating shaft (12).

16. The paper tail folding mechanism (5) according to claim 15, characterized in that: The second rotating shaft (13) is rotatably assembled on the first rotating base (15), the paper tail folding piece (8) is fixed on the second rotating shaft (13), the inner folding driving element (10) is connected with the second rotating shaft (13), and the second rotating shaft (13) is driven to rotate.

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