Bottom folding and paper clamping device of paper bag machine

Abstract

The utility model relates to a paper bag machine, in particular to a paper bag machine bottom folding and paper clamping device which comprises a main shaft, an installation part, bottom clamping assemblies and a cam part, the main shaft is rotationally arranged, the installation part is installed on the main shaft and comprises a large hub wheel and a supporting plate, the bottom clamping assemblies are arranged in the circumferential direction of the large hub wheel at intervals, each bottom clamping assembly comprises a side clamp, and each side clamp comprises a claw seat. The claw seat is arranged on the supporting plate in an inward and outward swinging mode, the cam piece is in transmission connection with the claw seat, the cam piece is provided with a circumferential cam groove, a transmission piece is connected between the cam piece and the claw seat and comprises a lifting rod and a transmission rod, one end of the lifting rod is arranged in the circumferential cam groove in a sliding mode, and one end of the transmission rod is connected with the claw seat. The other end of the transmission rod is hinged to the lifting rod, the lifting rod is provided with a radial limiting seat, the lifting rod moves in the radial direction relative to the main shaft, up-and-down lifting of the cam face is replaced by radial lifting of the lifting rod, one end of the lifting rod is arranged in the circumferential cam groove in a sliding mode, action is timely, and high-speed production can be adapted.

Description

Technical Field

[0001] The utility model relates to a paper bag machine, in particular to a bottom folding and paper clamping device for a paper bag machine. Background Art

[0002] The Chinese invention patent with the publication number of CN105881971B discloses a side clamping and cam synchronous adjustment mechanism for a large hub wheel of a paper bag machine, including a wall panel 1, a main shaft gear 2, a main shaft 9, a cam 5, a large hub wheel 14, and a side clamp 16. The main shaft 9 is installed on the wall panel 1, the main shaft gear 2 is installed at one end of the main shaft 9, the large hub wheel 14 is installed on the main shaft 9 and is located between the wall panels 1. The roller 161 is installed at the lower part of the side clamp 16, and the outer circumferential surface of the roller 161 contacts the working surface of the cam 5. The side clamp moves along with the main shaft, and the working surface of the cam drives the side clamp to swing in and out through the roller. Such a transmission design has a delay in the in-and-out swing of the side clamp during high-speed operation, and the response is not timely enough. Content of the Utility Model

[0003] In view of the technical problems existing in the background art, the utility model aims to provide a bottom folding and paper clamping device for a paper bag machine, which is designed to drive the side clamp to swing in and out by a circumferential cam groove, with timely actions and suitable for high-speed production.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: The bottom folding and paper clamping device for a paper bag machine includes a main shaft, a mounting member, a bottom clamping assembly, and a cam member. The main shaft is rotatably arranged, the mounting member is installed on the main shaft. The mounting member includes a large hub wheel and a support plate. The bottom clamping assemblies are arranged at intervals along the circumference of the large hub wheel. The bottom clamping assembly includes side clamps. Each side clamp includes a finger claw seat. The finger claw seat is swingably arranged inside and outside on the support plate. The cam member is in transmission connection with the finger claw seat. Among them, the cam member is provided with a circumferential cam groove. A transmission member is connected between the cam member and the finger claw seat. The transmission member includes a lifting pull rod and a transmission rod. One end of the lifting pull rod is slidably arranged in the circumferential cam groove. One end of the transmission rod is connected to the finger claw seat, and the other end of the transmission rod is hinged to the lifting pull rod. The lifting pull rod is provided with a radial limit seat, and the lifting pull rod moves radially relative to the main shaft.

[0005] In this scheme, the rotation of the main shaft drives the mounting member and the side clamps to move. The finger claw seat drives the transmission member to move. One end of the lifting pull rod slides along the circumferential cam groove and moves radially relative to the main shaft under the restriction of the radial limit seat. The lifting pull rod drives the finger claw seat to swing in and out through the transmission rod, realizing the opening and closing of the side clamps.

[0006] Preferably, the radial limit seat is arranged on the large hub wheel.

[0007] In this scheme, the radial limit seat is arranged on the large hub wheel, with a reasonable structure and corresponding to the lifting pull rod one by one.

[0008] Preferably, the support plate is adjustably arranged on the large hub along the axial direction of the main shaft.

[0009] In this solution, the support plate is installed on the large hub. Compared with being installed on the main shaft, integrating the edge clamp onto the large hub optimizes the structure. The support plate is adjusted along the axial direction of the main shaft, enabling the edge clamp to adapt to paper bags with different bag widths.

[0010] Preferably, the cam member is sleeved on the main shaft. One end of the lifting rod is provided with a needle roller bearing, and the needle roller bearing slides along the circumferential cam groove.

[0011] In this solution, the design of the needle roller bearing reduces friction and improves service life.

[0012] Preferably, the circumferential cam groove includes a variable diameter section. The cam member is detachably provided with an adjusting member, and the adjusting member is provided with the variable diameter section.

[0013] In this solution, by replacing the adjusting member, the rapidity of the radius change of the variable diameter section can be changed, and it can also adapt to the wear of the variable diameter section.

[0014] Preferably, the finger claw seat is provided with a perforation and a pin. A spring is arranged in the perforation. The spring is connected with a guide post. The finger claw seat is rotatably provided with a driving member. The driving member is L-shaped. One end of the driving member is hinged to the transmission rod, and the other end of the driving member is located between the guide post and the pin.

[0015] In this solution, when the driving member abuts against the pin, it can drive the finger claw seat to swing outwards. When the driving member abuts against the guide post, it drives the finger claw seat to swing inwards. After the finger claw seat swings inwards in place, if the driving member continues to move, it will compress the spring. The setting of the spring avoids excessive clamping.

[0016] Preferably, a first hinge shaft is provided between the transmission rod and the lifting rod, and a second hinge shaft is provided between the driving member and the transmission rod. The axis of the first hinge shaft is not parallel to the axis of the second hinge shaft.

[0017] In this solution, the support plate is adjusted along the axial direction of the main shaft. The setting of the second hinge shaft can adapt to the adjustment of the transmission rod in the inner and outer directions, and the setting of the first hinge shaft can adapt to the adjustment of the transmission rod in the circumferential direction of the cam member.

[0018] The beneficial effect of the present utility model is that the radial lifting of the lifting rod is used to replace the undulating lifting of the cam surface. One end of the lifting rod is slidably arranged in the circumferential cam groove, with timely action and accurate response, and it can adapt to high-speed production. Therefore, the present utility model has substantial features and progress compared with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The embodiments and related details and working principles of the present utility model will be described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0021] Figure 2 is Figure 1 an enlarged view of A in

[0022] Figure 3 It is a side view of the cam member and the side clamp in the present utility model.

[0023] Figure 4 It is a structural schematic diagram of the cam member and the side clamp in the present utility model.

[0024] Figure 5 It is a cross-sectional view of the side clamp in the present utility model.

[0025] In the figure: 1, main shaft; 2, mounting member; 3, large hub wheel; 4, support plate; 5, clamp bottom assembly; 6, side clamp; 7, finger claw seat; 8, cam member; 9, circumferential cam groove; 10, transmission member; 11, lifting pull rod; 12, transmission rod; 13, radial limit seat; 14, needle roller bearing; 15, perforation; 16, pin; 17, spring; 18, guide post; 19, driving member; 20, first hinge shaft; 21, second hinge shaft; 22, variable diameter section; 23, adjusting member. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only part of the embodiments of the implementation manner of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0027] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0028] In the description of the present application, terms such as "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0029] See attached Figures 1-4, in an embodiment of this implementation manner, a bottom folding and paper clamping device of a paper bag machine includes a main shaft 1, a mounting member 2, a bottom clamping assembly 5, and a cam member 8. The main shaft 1 is rotatably arranged, the mounting member 2 is installed on the main shaft 1, the mounting member 2 includes a large hub wheel 3 and a support plate 4, the support plate 4 is adjustably arranged on the large hub wheel 3 along the axial direction of the main shaft 1, the bottom clamping assemblies 5 are circumferentially spaced along the large hub wheel 3, the bottom clamping assembly 5 includes side clamps 6, the side clamps 6 include finger claw seats 7, the finger claw seats 7 are swingably arranged inside and outside on the support plate 4, the cam member 8 is sleeved on the main shaft 1, and the cam member 8 is in driving connection with the finger claw seats 7.

[0030] Wherein, the cam member 8 is provided with a circumferential cam groove 9, the circumferential cam groove 9 includes a variable diameter section 22, the cam member 8 is detachably provided with an adjusting member 23, the adjusting member 23 is provided with the variable diameter section 22, a transmission member 10 is connected between the cam member 8 and the finger claw seats 7, the transmission member 10 includes a lifting pull rod 11 and a transmission rod 12, one end of the lifting pull rod 11 is provided with a needle roller bearing 14, the needle roller bearing 14 slides along the circumferential cam groove 9, one end of the transmission rod 12 is connected to the finger claw seat 7, the other end of the transmission rod 12 is hinged to the lifting pull rod 11, the lifting pull rod 11 is provided with a radial limit seat 13, the radial limit seat 13 is arranged on the large hub wheel 3, and the lifting pull rod 11 moves radially relative to the main shaft 1.

[0031] In this implementation manner, the cam member 8 is stationary, the rotation of the main shaft 1 drives the mounting member 2 to move, the finger claw seats 7 and the transmission member 10 connected to the finger claw seats 7 move along with the support plate 4, the needle roller bearing 14 slides along the circumferential cam groove 9, when the needle roller bearing 14 passes through the variable diameter section 22, the lifting pull rod 11 will move radially relative to the main shaft 1. At this time, the lifting pull rod 11 will lift the finger claw seat 7 through the transmission rod 12, realizing the internal and external swing of the finger claw seat 7. Among them, the swing of the side clamp 6 towards the paper bag on the surface of the large hub wheel 3 is inwards, and the swing of the side clamp 6 away from the paper bag on the surface of the large hub wheel 3 is outwards. The variable diameter section 22 of the circumferential cam groove 9 corresponds to the swing of the finger claw seat 7, with timely action, accurate response, and adaptation to high-speed production. The variable diameter section 22 has large wear, and the variable diameter section 22 can be updated by replacing the adjusting member 23, and the rapidity of the radius change of the variable diameter section 22 can also be adjusted.

[0032] In other alternative implementation manners, the support plate 4 can also be installed on the main shaft 1, and the radial limit seat 13 can be arranged on the cam member 8.

[0033] See the appendix Figure 5, the finger seat 7 is provided with a through hole 15 and a pin 16. A spring 17 is arranged in the through hole 15. The spring 17 is connected with a guide post 18. The finger seat 7 is rotatably provided with a driving member 19. The driving member 19 is in an L shape. One end of the driving member 19 is hinged to the transmission rod 12. The other end of the driving member 19 is located between the guide post 18 and the pin 16. A first hinge shaft 20 is arranged between the transmission rod 12 and the lifting rod 11. A second hinge shaft 21 is arranged between the driving member 19 and the transmission rod 12. The axis of the first hinge shaft 20 is not parallel to the axis of the second hinge shaft 21.

[0034] In this embodiment, when the finger seat 7 swings outwards, the transmission rod 12 will drive the driving member 19 to approach the pin 16 and drive the finger seat 7 through the pin 16. When the finger seat 7 swings inwards, the transmission rod 12 will drive the driving member 19 to abut against the guide post 18 and compress the spring 17. Part of the force is converted into the deformation of the spring 17 to avoid excessive clamping. Among them, the transmission rod 12 is hinged to the driving member 19, and the axis of the first hinge shaft 20 is set not to be parallel to the axis of the second hinge shaft 21, which can adapt to the adjustment of the support plate 4 along the axis direction of the main shaft 1.

[0035] The above is the preferred embodiment of the present invention. It should be noted that the protection scope of the present invention is not limited thereto. For those skilled in the art of this technology, without departing from the technical scope disclosed by the present invention under the premise of the same inventive concept, several improvements, retouches or equivalent substitutions can also be made, which are also regarded as the protection scope of the present invention.

Claims

1. A bottom folding and paper clamping device for a paper bag machine, comprising a main shaft (1) which is rotatably arranged; a mounting member (2) which is mounted on the main shaft (1), and the mounting member (2) includes a large hub wheel (3) and a support plate (4); a bottom clamping assembly (5) which is circumferentially spaced along the large hub wheel (3), the bottom clamping assembly (5) includes side clamps (6), and the side clamps (6) include finger claw seats (7), and the finger claw seats (7) are swingably arranged inside and outside on the support plate (4); a cam member (8) which is in transmission connection with the finger claw seat (7); Characterized in that: the cam member (8) is provided with a circumferential cam groove (9), a transmission member (10) is connected between the cam member (8) and the finger claw seat (7), the transmission member (10) includes a lifting pull rod (11) and a transmission rod (12), one end of the lifting pull rod (11) is slidably arranged in the circumferential cam groove (9), one end of the transmission rod (12) is connected with the finger claw seat (7), the other end of the transmission rod (12) is hinged to the lifting pull rod (11), the lifting pull rod (11) is provided with a radial limit seat (13), and the lifting pull rod (11) moves radially relative to the main shaft (1).

2. The bottom folding and paper clamping device of a paper bag machine according to claim 1, wherein: The radial limit seat (13) is arranged on the large hub wheel (3).

3. The bottom folding and paper clamping device of a paper bag machine according to claim 1, characterized in that: The support plate (4) is adjustably arranged on the large hub wheel (3) along the axial direction of the main shaft (1).

4. The bottom folding and paper clamping device of a paper bag machine according to claim 1, characterized in that: The cam member (8) is sleeved on the main shaft (1), one end of the lifting pull rod (11) is provided with a needle roller bearing (14), and the needle roller bearing (14) slides along the circumferential cam groove (9).

5. The bottom folding and paper clamping device of a paper bag machine according to claim 1, characterized in that: The circumferential cam groove (9) includes a variable diameter section (22), and an adjusting member (23) is detachably arranged on the cam member (8), and the adjusting member (23) is provided with the variable diameter section (22).

6. The bottom folding and paper clamping device of a paper bag machine according to claim 1, characterized in that: The finger claw seat (7) is provided with a through hole (15) and a pin (16), a spring (17) is arranged in the through hole (15), the spring (17) is connected with a guide post (18), a driving member (19) is rotatably arranged on the finger claw seat (7), the driving member (19) is in an L shape, one end of the driving member (19) is hinged to the transmission rod (12), and the other end of the driving member (19) is located between the guide post (18) and the pin (16).

7. The bottom folding and paper clamping device of a paper bag machine according to claim 6, characterized in that: A first hinge shaft (20) is arranged between the transmission rod (12) and the lifting pull rod (11), and a second hinge shaft (21) is arranged between the cam member (8) and the transmission rod (12), and the axis of the first hinge shaft (20) is not parallel to the axis of the second hinge shaft (21).

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