Pneumatic clamping device for printing presses

Abstract

The utility model discloses a kind of pneumatic clamping devices for printing machine, cylinder is set on clamp base, one end of cylinder is connected to push plate, two rotating arms are set on clamp base, push plate is used to push rotating arm, rotating arm is connected by spring between, rotating arm one end is provided with bending section, one end of bending section is provided with push-pull rod, cover plate is also set on clamp base, branch plate is set on one side of cover plate, first sliding slot is set on branch plate, guide rod is set in first sliding slot, backplate connecting plate is set on one end of guide rod, backplate connecting plate connects backplate, backplate is provided with brake pad. By the design of cylinder driving inverted triangle push plate, the vertical thrust is converted into the synchronous rotation movement of symmetrical rotating arm, the arc backplate is matched with double-slotted guide mechanism, the gradual enveloping clamping surface is automatically formed in the process of folding, the clamping force is evenly distributed along the circumference of material, the clamping two sides are symmetrical, and the clamped shaft is prevented from bending.

Description

Technical Field

[0001] This utility model belongs to the technical field of printing machine components, specifically relating to a pneumatic clamping device for printing machines. Background Technology

[0002] In the field of printing machinery, the clamping device of roll material or printing plate directly affects the printing accuracy and operational stability. Traditional printing press clamping devices mostly adopt mechanical screw or hydraulic clamping structures, which have the following defects: (1) The adjustment process depends on manual turning, which has low operating efficiency and makes it difficult to achieve dynamic pressure compensation; (2) The clamping force is unevenly distributed, which can easily lead to deformation of thin materials or slippage of thick materials; Existing technologies such as CN202911290U, although pneumatically driven, have a single-point force application defect in their push rod mechanism, which leads to the clamping surface being skewed. Long-term unilateral pressure braking can easily lead to shaft deformation. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic clamping device for printing presses to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic clamping device for a printing press, comprising a clamping base, a cylinder mounted on the clamping base, one end of the cylinder connected to a push plate, two rotating arms mounted on the clamping base, the push plate used to push the rotating arms to rotate, the rotating arms being connected by a spring, a bent section at one end of each rotating arm, a push-pull rod at one end of the bent section, a cover plate on the clamping base, a branch plate on one side of the cover plate, a first sliding groove on the branch plate, a guide rod within the first sliding groove, a back plate connecting plate at one end of the guide rod, the back plate connecting plate connecting to a back plate, a brake plate on the back plate, a second sliding groove on the back plate connecting plate, and the push-pull rod within the second sliding groove.

[0005] Preferably, a mounting plate is provided on the side of the clamp base.

[0006] Preferably, a shaft is provided on the fixture base, and the rotating arm is sleeved on the shaft.

[0007] Preferably, the shaft is a hollow structure, and a screw is threaded into the shaft.

[0008] Preferably, the bent section is bent toward the fixture base.

[0009] Preferably, a baffle is provided at one end of the guide rod.

[0010] Preferably, the baffle is fixed to one end of the guide rod by screws.

[0011] The technical effects and advantages of this utility model are as follows: 1. By using a cylinder to drive an inverted triangular push plate, the vertical thrust is converted into the synchronous rotational motion of the symmetrical rotating arm. Combined with an arc-shaped back plate and a double sliding groove guide mechanism, a progressively enveloping clamping surface is automatically formed during the closing process, so that the clamping force is evenly distributed along the circumference of the material and the clamping sides are symmetrical, thus avoiding bending of the clamped shaft.

[0012] 2. The design of the swing arm bending section provides installation space for the back panel, making the overall structure more compact. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the rotating arm mounting structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the backplate structure of this utility model.

[0017] In the diagram: 1. Fixture base; 2. Cylinder; 3. Push plate; 4. Mounting plate; 5. Shaft; 6. Rotary arm; 7. Bending section; 8. Push-pull rod; 9. Spring; 10. Cover plate; 11. Branch plate; 12. First slide groove; 13. Back plate; 14. Back plate connecting plate; 15. Guide rod; 16. Second slide groove; 17. Brake pad. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] This utility model provides, for example Figures 1-4 The pneumatic clamping device for a printing press shown includes a clamping base 1, a cylinder 2 mounted on the clamping base 1, a push plate 3 connected to the output end of the cylinder 2, the push plate 3 being inverted triangular in shape, two rotating arms 6 mounted on the clamping base 1, a shaft 5 mounted on the clamping base 1, the rotating arms 6 being sleeved on the shaft 5, the push plate 3 being pushed downward by the cylinder 2, causing the upper end of the rotating arm 6 to rotate outward, and the lower end of the rotating arm 6 to retract inward, thus realizing the rotation of the rotating arm 6, the rotating arms 6 being connected by a spring 9, the spring 9 being used to push the rotating arm 6 to reset, a bent section 7 being provided at one end of the rotating arm 6, the bent section 7 bending towards one side of the clamping base 1 to provide installation space for the back plate 13, and a push-pull rod 8 being provided at one end of the bent section 7;

[0020] A cover plate 10 is also provided on the fixture base 1. The cover plate 10 is connected to the fixture base 1 by a screw. The shaft 5 is a hollow structure, and a screw is screwed into the shaft 5. When installing the cover plate 10, the upper part of the cover plate 10 is directly connected to the fixture base 1 by the screw, and the lower part of the cover plate 10 passes through the screw, which is screwed into the shaft 5. Two branch plates 11 are symmetrically arranged on the outer side of the lower end of the cover plate 10. A first sliding groove 12 is arranged horizontally on the branch plate 11, and a guide rod 15 is arranged in the first sliding groove 12. The guide rod 15 moves laterally within the first slide groove 12. A back plate connecting plate 14 is provided at one end of the guide rod 15. The back plate connecting plate 14 is integrally connected to the back plate 13. The back plate 13 is an arc-shaped plate. A brake piece 17 is provided on the back plate 13. A second slide groove 16 is provided on the back plate connecting plate 14. The push-pull rod 8 is provided within the second slide groove 16. When the bent section 7 retracts inward, it drives the push-pull rod 8 to move. The push-pull rod 8 pushes the back plate connecting plate 14, causing the back plate 13 to retract inward for positioning.

[0021] Specifically, a mounting plate 4 is provided on the side of the fixture base 1, and the mounting plate 4 is fixed to the printer with screws.

[0022] Specifically, a baffle is provided at one end of the guide rod 15. The baffle is fixed to one end of the guide rod 15 with screws. The baffle is detachable, which facilitates the disassembly and assembly of the back plate 13.

[0023] During use, the pneumatic clamping device of the printing press pushes the upper end of the rotating arm 6 to rotate outward, and the lower end of the rotating arm 6 retracts inward, thus rotating the rotating arm 6. When the lower end of the rotating arm 6 retracts inward, it drives the push-pull rod 8 to move inward. The push-pull rod 8 pushes the back plate connecting plate 14, causing the back plate 13 to retract inward for clamping and positioning.

[0024] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pneumatic clamping device for a printing press, characterized in that: The fixture includes a clamp base (1), on which a cylinder (2) is mounted. One end of the cylinder (2) is connected to a push plate (3). Two rotating arms (6) are mounted on the clamp base (1). The push plate (3) is used to push the rotating arms (6) to rotate. The rotating arms (6) are connected by a spring (9). One end of each rotating arm (6) is provided with a bent section (7). One end of the bent section (7) is provided with a push-pull rod (8). A cover plate (10) is also mounted on the clamp base (1). A branch plate (11) is provided on one side of the plate (10). A first groove (12) is provided on the branch plate (11). A guide rod (15) is provided in the first groove (12). A back plate connecting plate (14) is provided at one end of the guide rod (15). The back plate connecting plate (14) is connected to the back plate (13). A brake plate (17) is provided on the back plate (13). A second groove (16) is provided on the back plate connecting plate (14). The push-pull rod (8) is provided in the second groove (16).

2. The pneumatic clamping device for a printing press according to claim 1, characterized in that: The clamp base (1) is provided with a mounting plate (4) on its side.

3. The pneumatic clamping device for a printing press according to claim 1, characterized in that: The clamp base (1) is provided with a shaft (5), and the rotating arm (6) is sleeved on the shaft (5).

4. The pneumatic clamping device for a printing press according to claim 3, characterized in that: The shaft (5) is a hollow structure, and a screw is threaded inside the shaft (5).

5. A pneumatic clamping device for a printing press according to claim 1, characterized in that: The bent section (7) is bent toward the clamp base (1) side.

6. The pneumatic clamping device for a printing press according to claim 1, characterized in that: A baffle is provided at one end of the guide rod (15).

7. A pneumatic clamping device for a printing press according to claim 6, characterized in that: The baffle is fixed to one end of the guide rod (15) by screws.

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