Mechanical pressing type paper roll tail sealing unit

Abstract

A mechanical pressing type paper roll tail sealing unit is provided with two chucks, each chuck is composed of an anvil and a lever, one end of each lever is opposite to the corresponding anvil to form a jaw of the corresponding chuck, the other ends of the levers of the two chucks are hinged to connecting rods respectively, the other ends of the two connecting rods are jointly hinged to the same connecting piece, and the connecting piece is connected with a driver. And the driver drives the connecting piece to reciprocate towards the direction for driving the lever to swing back and forth. The utility model further provides another scheme, a driver is connected between the levers of the two chucks, a machine shell of the driver is connected with one lever, a push-pull rod of the driver is connected with the other lever, and the driver drives the push-pull rod to stretch out and draw back relative to the machine shell so as to drive the two levers to swing in a reciprocating mode. The paper roll tail sealing device has the advantages that two paper rolls can be sealed at the same time by arranging one driver on one paper roll tail sealing unit, the number of the needed drivers is reduced by half compared with the prior art, the equipment cost is reduced, and the equipment size is reduced.

Description

Technical Field

[0001] The utility model relates to paper roll processing equipment, in particular to a mechanism for pressing and fixing the outermost circle paper and the second outer circle paper of a paper roll together. Background Art

[0002] Mechanically pressed paper roll tail-sealing units are widely used in paper roll processing equipment to press and secure the outermost and second-outermost paper rolls together. In the prior art, such paper roll tail-sealing units include a chuck and a driver for opening and closing the chuck, with the driver driving the chuck to open and close. When sealing the paper roll, the chuck closes, pressing and securing the outermost and second-outermost paper rolls together. Such mechanically pressed paper roll tail-sealing units can be found in public documents such as Chinese Patent CN201720035430.6, "A roll tail-sealing mechanism adaptable to multiple roll diameters," or Chinese Patent CN107720367A, "A tail-sealing unit in a roll-to-roll adhesive-free tail-sealing device with single-side pressing."

[0003] Because a single paper roll tail-sealing unit can only seal a single roll of paper, the prior art proposes an improved solution to improve the equipment's operating efficiency, such as the patent application with publication number CN109879095A, entitled "High-speed Glue-free Tail-Sealing Device and Working Method." This improved solution features multiple paper roll tail-sealing units arranged along the rolling direction of the paper roll. These units operate simultaneously, allowing multiple rolls of paper to be sealed simultaneously. However, this improved solution still uses the structure of the existing paper roll tail-sealing unit, and a single paper roll tail-sealing unit can still only seal a single roll of paper. The number of paper roll tail-sealing units required is equal to the number of rolls of paper that need to be sealed simultaneously. Each paper roll tail-sealing unit includes a driver that drives the chuck to open and close. The number of drivers required corresponds to the number of paper roll tail-sealing units, which not only increases the cost of the equipment but also increases its size. Utility Model Content

[0004] The utility model aims to provide a mechanical pressing type paper roll tail sealing unit, so as to realize the function of sealing the tails of two paper rolls at the same time by using one paper roll tail sealing unit.

[0005] The utility model is implemented as follows: a mechanical pressing paper roll sealing unit includes a chuck and a driver for driving the chuck to open and close, in particular, two chucks are provided, the two chucks are arranged in a direction perpendicular to the axis of the paper roll, each chuck is composed of an anvil and a lever, one end of the lever is opposite to the anvil to form the jaws of the chuck, the jaws open and close as the lever swings back and forth, the other ends of the levers of the two chucks are respectively hinged to connecting rods, the other ends of the two connecting rods are hinged to the same connecting member, the connecting member is connected to the driver, and the driver drives the connecting member to reciprocate in the direction of driving the lever to swing back and forth.

[0006] As a preferred embodiment, the connecting member has the freedom to deflect back and forth between the two levers.

[0007] As a best embodiment, the driver drives the connecting member to move back and forth linearly, and the housing of the driver is hinged to the frame.

[0008] As a best embodiment, the anvils of the two chucks are the same component, and the anvil is located between the two levers.

[0009] As a best embodiment, the same connecting member to which the two connecting rods are hinged is the hinge axis of the hinge.

[0010] The present invention can also adopt another technical solution: a mechanical pressing paper roll sealing unit, including a chuck and a driver for driving the chuck to open and close, in particular, two chucks are provided, the two chucks are arranged in a direction perpendicular to the axis of the paper roll, each chuck is composed of an anvil and a lever, one end of the lever is opposite to the anvil to form the jaws of the chuck, the jaws open and close as the lever swings back and forth, a driver is connected between the levers of the two chucks, the driver has a housing and a push-pull rod that can be extended relative to the housing, the housing of the driver is connected to one of the levers, the push-pull rod of the driver is connected to the other lever, the driver drives the push-pull rod to extend and retract relative to the housing, thereby driving the two levers to swing back and forth.

[0011] As a best embodiment, the driver is suspended between the two levers, the housing of the driver is hinged to one of the levers, and the push-pull rod of the driver is hinged to the other lever.

[0012] The utility model has the advantage that one paper roll sealing unit is equipped with one driver and can seal two paper rolls at the same time, and the number of drivers required is reduced by half compared with the prior art, thereby reducing both equipment cost and equipment size. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of embodiment 1 of scheme 1;

[0014] Figure 2 It is a schematic diagram of two clamps clamping the paper roll at the same time;

[0015] Figure 3 A schematic diagram showing that one clamp has clamped the outer periphery of a paper roll while the other clamp has not yet clamped;

[0016] Figure 4 This is one of the embodiments of the utility model applied to paper processing equipment;

[0017] Figure 5 This is the second embodiment of the present utility model applied to paper processing equipment;

[0018] Figure 6 This is a structural diagram of embodiment 2 of scheme 1;

[0019] Figure 7 This is a structural diagram of embodiment 3 of scheme 1;

[0020] Figure 8 This is a structural diagram of embodiment 4 of scheme 1;

[0021] Figure 9 This is a structural diagram of embodiment 5 of scheme 1;

[0022] Figure 10 This is a structural diagram of embodiment 1 of scheme 2;

[0023] Figure 11 It is a schematic diagram of two clamps clamping the paper roll at the same time;

[0024] Figure 12 This is a structural diagram of Example 2 of Solution 2;

[0025] Figure 13 This is a structural diagram of embodiment 3 of scheme 2. DETAILED DESCRIPTION

[0026] To facilitate understanding of the present invention, a more comprehensive description is provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided solely to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0027] Example 1 of Solution 1

[0028] See also Figure 1 The mechanical pressing paper roll sealing unit of the present invention is provided with two chucks, one of which is composed of an anvil 1 and a lever 2, and the other is composed of an anvil 3 and a lever 4. The two chucks are arranged in a direction perpendicular to the axis of the paper roll, that is, along the Figure 1Arranged in the left and right directions. The upper end of the lever 2 and the anvil 1 form the jaw 5 of the left chuck. The upper end of the lever 4 and the anvil 3 form the jaw 6 of the right chuck. The jaws 5 and 6 open and close as the levers 2 and 4 swing back and forth. The two anvils 1 and 3 of this embodiment are the left and right ends of the same component. The other ends of the levers 2 and 4 of the two chucks are hinged with connecting rods 7 and 8 respectively, and the other ends of the two connecting rods 7 and 8 are hinged to the same connecting member 9. The connecting member 9 of this embodiment is the hinge axis that hinges the two connecting rods 7 and 8 together. The connecting member 9 is connected to the driver 10. The driver 10 of this embodiment is a cylinder assembly. The connecting member 9 is fixed to the piston rod of the cylinder assembly 10. The cylinder assembly 10 drives the connecting member 9 to move up and down in a straight line, thereby driving the two levers 2 and 4 to swing back and forth simultaneously through the connecting rods 7 and 8.

[0029] When sealing the paper roll, Figure 2 As shown, the two paper rolls 11 and 12 are pressed against the jaws 5 and 6 of the two clamps respectively ( Figure 2 (The mechanism for pressing the paper roll against the jaws is omitted). The piston rod of the cylinder assembly 10 moves upward, and simultaneously drives the upper ends of the two levers 2 and 4 to swing toward the anvils 1 and 3 respectively through the connecting piece 9 and the two connecting rods 7 and 8, causing the jaws 5 and 6 of the two chucks to close simultaneously, thereby simultaneously pressing and fixing the outermost and second outermost paper circles of the two paper rolls 11 and 12 together, completing the end sealing of the two paper rolls 11 and 12.

[0030] As a best practice, see Figure 1 The housing of the driver 10 is hinged to the frame, that is, the cylinder body of the cylinder assembly 10 is hinged to the frame, so that the connecting member 9 fixed to the piston rod has the freedom to reciprocate between the two levers 2 and 4. This structure allows the two clamps to balance the clamping pressure, ensuring that both clamps can apply effective pressing force to the paper roll. Figure 3 Explain its principle. Assume that when the cylinder assembly 10 drives the connecting member 9 to move upward, Figure 3In the illustrated situation, lever 2 of the left chuck has already clamped protrusion 11a on the outer periphery of paper roll 11, while lever 4 of the right chuck has not yet clamped protrusion 12a on the outer periphery of paper roll 12. At this point, the reaction force on connecting member 9, transmitted via left lever 2 and connecting rod 7, becomes greater than the reaction force transmitted via right lever 4 and connecting rod 8. Furthermore, because cylinder assembly 10 is hinged to the frame, connecting member 9 immediately deflects toward right lever 4, causing cylinder assembly 10 to rotate clockwise until right lever 4 clamps protrusion 12a on the outer periphery of paper roll 12. Ultimately, the clamping pressure exerted by levers 2 and 4 on paper rolls 11 and 12 becomes uniform. This ensures that both chucks can effectively apply pressure to the paper roll, preventing a situation where only one chuck can complete the end seal while the other cannot.

[0031] It should be noted that if the piston rod of the cylinder assembly 10 is not constrained by the cylinder body to simple linear motion, but has a certain swing margin relative to the cylinder body, then the cylinder body of the cylinder assembly 10 can also be fixed on the frame without moving, and the swing margin of the piston rod relative to the cylinder body can be used to allow the connecting piece 9 fixed on the piston rod to have the freedom to reciprocate between the two levers 2 and 4.

[0032] In addition to a pneumatic cylinder assembly, a hydraulic cylinder assembly, a linear motor, or a rack-and-pinion mechanism that converts the motor's rotational motion into the reciprocating linear motion of a rack can also be used as the driver for driving the reciprocating linear motion of the connecting member 9. If the driver is a hydraulic cylinder assembly, the cylinder body of the hydraulic cylinder assembly is the housing of the driver articulated to the frame described in this embodiment. If the driver is a linear motor, the motor housing of the linear motor is the housing of the driver articulated to the frame described in this embodiment. If the driver is a rack-and-pinion mechanism, the component that constrains the linear motion of the rack is the housing of the driver articulated to the frame described in this embodiment.

[0033] It should be noted that the paper roll can be rotated along the axial direction, that is, perpendicular to the Figure 1 A plurality of paper roll sealing units of the present invention are arranged in the direction of the drawing plane, so that the outermost circle of paper and the second outer circle of paper of the paper roll can be pressed and fixed together at different positions along the entire length of the paper roll.

[0034] Figure 4 This is an embodiment of the present invention applied to paper processing equipment, showing how the paper processing equipment transfers two rolls of paper to the two clamping heads of the paper roll sealing unit of the present invention. Figure 4The cross-turning mechanism 13 flips the paper rolls fed from the upstream equipment one by one until they contact the endless belt 14. The endless belt 14 then rolls the paper rolls one by one to the tail-finding and orienting mechanism 15 (the cross-turning mechanism 13 pauses while the endless belt 14 is running). The tail-finding and orienting mechanism 15 rotates the paper rolls in place, unwinding the tail of the roll using an air blower 16. A photoelectric sensor 17 determines whether the tail of the roll has been unwound. When the endless belts 14, 18, and 19 are operating synchronously, the paper rolls can be rolled from the tail-finding and orienting mechanism to the right jaw 6 of the paper roll tail sealing unit. When only the endless belts 14 and 18 are operating synchronously, the paper rolls can be rolled from the tail-finding and orienting mechanism to the left jaw 5 of the paper roll tail sealing unit. While jaws 5 and 6 are closing, the endless belt 19 pauses, pressing the two rolls against jaws 5 and 6, respectively.

[0035] Figure 5 This is another embodiment of the utility model applied to paper processing equipment. Figure 5 Compare Figure 4 A tail-finding and orienting mechanism 20 has been added to simultaneously unwind the tails of two paper rolls. When only the circulating belts 14 and 21 are operating synchronously, the paper roll can be rolled from the cross-turning mechanism 13 to the right-hand tail-finding and orienting mechanism 20. When only the circulating belt 14 is operating, the paper roll can be rolled from the cross-turning mechanism 13 to the left-hand tail-finding and orienting mechanism 15. When the circulating belts 14, 21, 18, and 19 are operating synchronously, the paper roll can be rolled from the left-hand tail-finding and orienting mechanism 15 to the right-hand jaw 6 of the paper roll tail sealing unit. When only the circulating belts 14, 21, and 18 are operating synchronously, the paper roll can be rolled from the left-hand tail-finding and orienting mechanism 15 to the left-hand jaw 5 of the paper roll tail sealing unit. When only the circulating belts 21, 18, and 19 are operating synchronously, the paper roll can be rolled from the right-hand tail-finding and orienting mechanism 20 to the right-hand jaw 6 of the paper roll tail sealing unit. When only the circulating belt 21 and the circulating belt 18 are running synchronously, the paper roll can be rolled from the right tail-finding and orientation mechanism 20 to the jaw 5 of the left clamp of the paper roll tail sealing unit.

[0036] Example 2 of Solution 1

[0037] See also Figure 6 , this embodiment and Figure 1 The difference is that the top of the piston rod is fixed with a slide rail 22, and the two connecting rods 7 and 8 are hinged to the same connecting member 9 through different hinge axes. The connecting member 9 is slidably connected to the slide rail 22, and the connecting member 9 can move along the Figure 6The connecting member 9 slides back and forth in the direction indicated by the arrow, thereby allowing the connecting member 9 to have the freedom to reciprocate between the two levers 2 and 4. The specific connection method between the connecting member 9 and the slide rail 22 can adopt a conventional sliding connection method such as a dovetail groove. For the parts not described in detail in this embodiment, refer to the first embodiment.

[0038] Example 3 of Solution 1

[0039] See also Figure 7 , this embodiment and Figure 1 The differences lie in the different positions of the two anvils 1 and 3, and the corresponding relationship between the swing direction of the levers 2 and 4 and the movement direction of the connecting member 9 and the opening and closing of the jaws is exactly opposite to that of the first embodiment. When the piston rod of the cylinder assembly 10 drives the connecting member 9 downward, the jaws 5 and 6 of the two chucks close. The portions of this embodiment not described in detail refer to the first embodiment.

[0040] Example 4 of Solution 1

[0041] See also Figure 8 , this embodiment and Figure 1 The difference lies in the different positions of the anvil 1, the two levers 2 and 4 are parallel to each other, the two connecting rods 7 and 8 are parallel to each other, and the two connecting rods 7 and 8 are hinged to the same connecting member 9 through different hinge axes. For the parts not described in detail in this embodiment, refer to the first embodiment.

[0042] Example 5 of Solution 1

[0043] See also Figure 9 , this embodiment and Figure 1 The difference is that the two connecting rods 7 and 8 are hingedly connected to a common connecting member 9, which is fixed to a rotating member 24 that is driven to rotate back and forth by a motor 23. When the rotating member 24 rotates back and forth, it drives the two levers 2 and 4 to swing back and forth through the two connecting rods 7 and 8. For the parts not described in detail in this embodiment, refer to the first embodiment.

[0044] Example 1 of Solution 2

[0045] The present invention can also adopt another technical solution. Figure 10 The mechanical pressing paper roll sealing unit of the present invention is provided with two chucks, one of which is composed of an anvil 1 and a lever 2, and the other is composed of an anvil 3 and a lever 4. The two chucks are arranged in a direction perpendicular to the axis of the paper roll, that is, along the Figure 10 The upper end of lever 2 and anvil 1 form jaw 5 of the left chuck. The upper end of lever 4 and anvil 3 form jaw 6 of the right chuck. Jaws 5 and 6 open and close as levers 2 and 4 swing back and forth.

[0046] A driver 10 is connected between the levers 2 and 4 of the two chucks. In this embodiment, driver 10 is a cylinder assembly. The housing of driver 10 is the cylinder body of the cylinder assembly, which is hingedly connected to lever 4. The push-pull rod of driver 10, which extends and retracts relative to the housing, is the piston rod of the cylinder assembly, which is hingedly connected to the other lever 2. The cylinder assembly drives the piston rod to extend and retract relative to the cylinder body, thereby driving the two levers 2 and 4 to swing back and forth. In this embodiment, cylinder assembly 10 is suspended between the two levers 2 and 4, requiring no additional support, resulting in the simplest structure and lowest cost.

[0047] When sealing the paper roll Figure 11 As shown, the two paper rolls 11 and 12 are pressed against the jaws 5 and 6 of the two clamps respectively ( Figure 11 (The mechanism for pressing the paper roll against the jaws is omitted). The piston rod of the cylinder assembly 10 extends, thereby driving the upper ends of the two levers 2 and 4 to swing toward the anvils 1 and 3 respectively, causing the jaws 5 and 6 of the two chucks to close simultaneously, thereby simultaneously pressing and fixing the outermost and second outermost paper circles of the two paper rolls 11 and 12 together, completing the end sealing of the two paper rolls 11 and 12.

[0048] Clearly, the two chucks of this embodiment function to balance the clamping force. If the anvil reaction force on one lever is greater than the other, the lever experiencing the greater reaction force will transmit this greater reaction force to the other lever via the cylinder assembly, thereby increasing the clamping force of the other lever on the paper roll. Ultimately, the clamping force of levers 2 and 4 of the two chucks on the paper roll is always consistent. This ensures that both chucks can apply effective pressure to the paper roll.

[0049] In addition to a pneumatic cylinder assembly, the actuator 10 can also utilize a hydraulic cylinder assembly or a linear motor. If a hydraulic cylinder assembly is used, the cylinder body of the hydraulic cylinder assembly serves as the actuator housing, and the piston rod of the hydraulic cylinder assembly serves as the push-pull rod that extends and retracts relative to the housing. If a linear motor is used, the motor housing of the linear motor serves as the actuator housing, and the linear reciprocating movable element driven by the linear motor serves as the push-pull rod that extends and retracts relative to the housing.

[0050] Example 2 of Solution 2

[0051] See also Figure 12 , this embodiment and Figure 10 The difference is that the cylinder body of the cylinder assembly 10 is fixed on a slider 25 that is slidably connected to the frame, and the cylinder body and the slider 25 can move along Figure 12The two clamps of this embodiment also have the function of balancing the clamping pressure. Since the cylinder assembly 10 of this embodiment cannot rise and fall with the swing of the levers 2 and 4, the hinge holes 26 on the two levers 2 and 4 are long strips to ensure that the two levers 2 and 4 can swing normally. Figure 10 The embodiment shown.

[0052] Example 3 of Solution 2

[0053] See also Figure 13 , this embodiment and Figure 10 The difference is that the positions of the two anvils 1 and 3 are different, and the corresponding relationship between the swing direction of the levers 2 and 4 and the telescopic direction of the cylinder assembly 10 and the opening and closing of the jaws is exactly the same as Figure 10 The embodiment shown is the opposite. When the piston rod of the cylinder assembly 10 is retracted into the cylinder body, the jaws 5 and 6 of the two chucks are closed. Figure 10 The embodiment shown.

[0054] It should be noted that, no matter it is Solution 1 or Solution 2, the paper roll tail sealing unit described in the present invention can be turned upside down, that is, the jaws of the two clamps clamp the top of the paper roll.

[0055] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the utility model patent. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A mechanical press-fit paper roll sealing unit comprising a chuck and a driver for driving the chuck to open and close, characterized by: There are two chucks, which are arranged in a direction perpendicular to the axis of the paper roll. Each chuck is composed of an anvil and a lever. One end of the lever is opposite to the anvil to form the jaws of the chuck. The jaws open and close as the lever swings back and forth. The other ends of the levers of the two chucks are respectively hinged to connecting rods, and the other ends of the two connecting rods are hinged to the same connecting piece. The connecting piece is connected to the driver, and the driver drives the connecting piece to reciprocate in the direction of driving the lever to swing back and forth.

2. The mechanical pressing paper roll sealing unit according to claim 1, characterized in that: The connecting member has the freedom to deflect back and forth between the two levers.

3. The mechanical pressing paper roll sealing unit according to claim 2, characterized in that: The driver drives the connecting member to move back and forth linearly, and the housing of the driver is hinged to the frame.

4. The mechanical pressing paper roll sealing unit according to claim 1, wherein: The anvils of the two chucks are the same component, which is located between the two levers.

5. The mechanical pressing paper roll sealing unit according to claim 1, characterized in that: The same connecting piece to which the two connecting rods are hinged is the hinge axis of the hinge.

6. A mechanical press-fit paper roll sealing unit comprising a chuck and a driver for driving the chuck to open and close, characterized by: There are two chucks, which are arranged in a direction perpendicular to the axis of the paper roll. Each chuck is composed of an anvil and a lever. One end of the lever is opposite to the anvil to form the jaws of the chuck. The jaws open and close as the lever swings back and forth. A driver is connected between the levers of the two chucks. The driver has a housing and a push-pull rod that can be extended and retracted relative to the housing. The housing of the driver is connected to one of the levers, and the push-pull rod of the driver is connected to the other lever. The driver drives the push-pull rod to extend and retract relative to the housing, thereby driving the two levers to swing back and forth.

7. The mechanical pressing paper roll sealing unit according to claim 6, characterized in that: The driver is suspended between the two levers, the housing of the driver is hinged to one of the levers, and the push-pull rod of the driver is hinged to the other lever.

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