Upper clamping mechanism of lasting machine

Abstract

The utility model discloses an upper clamping mechanism of a lasting machine. The upper clamping mechanism comprises a clamping belt assembly and a pair of holding pins, the clamping belt assembly comprises a clamping belt of which the shape is matched with a shoe toe part, a fixed block which is fixedly arranged on the outer side of the front tip of the clamping belt and is used for realizing assembly on a sweeping knife of the lasting machine, and shaft sleeves which are fixedly arranged on the outer sides of the two ends of the clamping belt; and the pair of holding pins is inserted into the shaft sleeve and is used for connecting an upper clamping arm of the lasting machine, so that the clamping belt can be controlled by the upper clamping arm to tightly hold or loosen the front upper of the shoe. After being assembled on an upper clamping arm of the lasting machine, the holding pin can be quickly detached and replaced, so that the maintenance time for replacing a broken pin shaft can be shortened, and the normal operation of a production line is prevented from being influenced. The toe lasting device is suitable for being applied to the lasting machine and is used for holding the toe lasting of the shoe so as to be matched with other parts to complete the toe lasting process.

Description

Technical Field

[0001] The utility model belongs to the technical field of shoemaking, and relates to a device used when stretching the front vamp, specifically to a vamp clamping mechanism of a lasting machine. Background Art

[0002] In the lasting process of the existing shoemaking, a lasting machine is usually used to perform lasting processing on the shoe vamp.

[0003] The lasting machine generally includes a vamp clamping mechanism, a clamping arm, a tensioning mechanism, a glue spraying mechanism and a tightening mechanism, wherein the vamp clamping mechanism is connected to the clamping arm of the lasting machine through a holding pin. During operation, the clamping arm performs a horizontal pushing action, and drives the vamp clamping mechanism to clamp the shoe vamp through the holding pin.

[0004] Due to the large clamping force required during the vamp clamping process, when the clamping arm performs a horizontal push, the shear pressure borne by the holding pin usually exceeds 30 MPa, resulting in frequent breakage of the pin shaft. The holding pins used in the existing equipment are relatively expensive, and the operation is relatively complex when replacing. When the holding pin breaks and needs to be replaced, it will not only increase the cost, but also cause the production to be interrupted for a long time due to the complex replacement operation, affecting the production efficiency. Content of the Utility Model

[0005] The utility model provides a vamp clamping mechanism of a lasting machine, which can solve the problems of low production efficiency and increased cost caused by the breakage of the pin shaft.

[0006] To achieve the above object, the technical solutions adopted by the utility model are as follows:

[0007] A vamp clamping mechanism of a lasting machine includes a tape component and a pair of holding pins; the tape component includes a tape whose shape is adapted to the front vamp of the shoe, a fixing block fixed on the outer side of the front tip of the tape for realizing the assembly on the sweeping knife of the lasting machine, and bushings fixed on the outer sides of both ends of the tape; a pair of the holding pins are inserted into the bushings and used to connect the clamping arm of the lasting machine, so as to enable the clamping arm to control the tape to clamp or loosen the front vamp of the shoe.

[0008] As a limitation of the utility model, the holding pin includes a pin shaft having a connecting portion and a force-applying portion, a D-shaped gasket fixed on the top end of the pin shaft for positioning on the clamping arm, and a rotating handle fixed on the D-shaped gasket; the connecting portion of the pin shaft is adapted to the bushing, and the cross-sectional diameter of the force-applying portion of the pin shaft is larger than the cross-sectional diameter of the connecting portion.

[0009] As a further limitation of the utility model, the rotating handle is a bolt welded and fixed on the D-shaped gasket.

[0010] As another limitation of the utility model, the tape is a U-shaped structure made of PVC, and a Teflon is attached to the outer surface.

[0011] Due to the adoption of the above technical solution, compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0012] (1) The present utility model designs a clamping mechanism applied to an existing lasting machine, which can be quickly replaced when the holding pin breaks. Specifically, the present utility model includes a tape component and a pair of holding pins. The tape component is connected to the clamping arm on the lasting machine through the holding pins. Since a D-shaped gasket is provided on the holding pin, during installation, only the flat end of the D-shaped gasket needs to be oriented towards the baffle on the clamping arm. After installation in place, rotate the holding pin so that the arc end of the D-shaped gasket is stuck inside the baffle to complete the fixation. When it is necessary to remove the holding pin, only rotate the holding pin so that the flat end of the D-shaped gasket is oriented towards the baffle on the clamping arm, and then it can be removed; through the above structure and operation method, the quick installation and disassembly of the holding pin can be realized.

[0013] (2) The holding pin in the present utility model is made by processing a conventional pin into two parts with different diameters and then welding a D-shaped gasket and a bolt. The pin, gasket, bolt, etc. are made of easily accessible materials and have low costs, which can effectively reduce the cost of replacing the holding pin.

[0014] (3) The tape in the present utility model is made of PVC material and has good elasticity, so that the rebound effect is good after clamping. In addition, the present utility model is provided with Teflon on the outer surface of the tape, which can enhance the durability of the tape and prevent the tape from breaking. Description of the Drawings

[0015] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0016] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the holding pin of an embodiment of the present utility model;

[0018] In the figure: 1, tape; 2, bushing; 3, fixed block; 4, holding pin;

[0019] 41, connecting part; 42, force-applying part; 43, D-shaped gasket; 44, rotating handle. Detailed Embodiments

[0020] The following describes the preferred embodiments of the present utility model with reference to the drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and understanding the present utility model, and are not used to limit the present utility model.

[0021] The embodiment disclosed herein is a clamping mechanism applied to an existing lasting machine, including a tape component and a pair of holding pins 4.

[0022] The cartridge assembly includes a cartridge 1, a bushing 2, and a fixing block 3. Among them, the cartridge 1 is a U-shaped structure made of PVC material and adapted to the shape of the front part of the shoe upper. The outer surface of the cartridge 1 is covered with Teflon to prevent the cartridge 1 from breaking. There are two bushings 2 symmetrically arranged with the symmetry axis of the cartridge 1 as the axis of symmetry, and they are respectively fixed on the outer walls of both sides of the cartridge 1 near the ends. The fixing block 3 is fixed on the outer wall of the front tip of the cartridge 1. During actual use, the cartridge assembly is assembled on the sweeping knife of the lasting machine through fixing bolts and the fixing block 3.

[0023] The holding pin 4 includes a pin shaft with a connecting portion 41 and a force-applying portion 42, a D-shaped gasket 43 fixed at the top of the force-applying portion 42 for placing the holding pin 4 on the clamping arm of the lasting machine, and a rotating handle 44 fixed on the D-shaped gasket 43. The cross-sectional diameter of the force-applying portion 42 of the pin shaft is larger than that of the connecting portion 41, and the rotating handle 44 is a bolt welded and fixed on the D-shaped gasket 43. During use, rotate the holding pin 4 so that the flat side of the D-shaped gasket 43 faces the clamping arm, and then insert the connecting portion 41 of the holding pin 4 into the bushing 2. When the connecting portion 41 is completely inserted into the bushing 2, it is considered in place. After the holding pin 4 is installed in place, rotate the holding pin 4 so that the arc end of the D-shaped gasket 43 is caught in the baffle of the clamping arm, and the installation of the holding pin 4 can be completed. When removing the holding pin 4, only need to rotate the flat side of the D-shaped gasket 43 to the initial position facing the clamping arm, and the holding pin 4 can be removed.

[0024] It should be noted here that the inner diameter of the bushing 2 matches the outer diameter of the connecting portion 41 of the holding pin 4, and the inner diameter of the bushing 2 is smaller than the outer diameter of the force-applying portion 42 to ensure that the holding pin 4 can be smoothly inserted into the bushing 2 and will not shake inside the bushing 2, and the force-applying portion 42 can be stuck on the bushing 42.

[0025] When using this embodiment, first assemble the cartridge assembly at the operating position on the sweeping knife of the lasting machine, then insert the holding pin 4 into the bushing 2 and rotate it to fix. After the installation is completed, start the lasting machine. The clamping arm drives the clamping unit to perform the clamping operation on the shoe upper by applying force to the force-applying portion 42 of the holding pin 4; when the holding pin 4 breaks, the broken holding pin 4 can be replaced according to the foregoing method.

[0026] It should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the above embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A clamping mechanism for a lasting machine, characterized by: It comprises a cassette assembly and a pair of holding pins; the cassette assembly comprises a cassette whose shape is adapted to the shoe upper, a fixing block fixed on the outer side of the front tip of the cassette for realizing assembly on the sweeping knife of the lasting machine, and axle sleeves fixed on the outer sides of both ends of the cassette; A pair of the holding pins are inserted in the shaft sleeve and are used to connect the clamping arm of the lasting machine so that the clamping arm can control the cassette to clamp or loosen the shoe upper.

2. The clamping mechanism of the lasting machine according to claim 1, characterized in that: The holding pin comprises a pin shaft having a connecting portion and a force-applying portion, a D-shaped gasket fixedly mounted on the top end of the pin shaft and used for positioning on the clamping arm, and a rotating handle fixedly mounted on the D-shaped gasket; The connecting portion of the pin shaft is matched with the shaft sleeve, and the cross-sectional diameter of the force-applying portion of the pin shaft is larger than the cross-sectional diameter of the connecting portion.

3. The clamping mechanism of the lasting machine according to claim 2, characterized in that: The turning handle is a bolt welded to a D-shaped washer.

4. A clamping mechanism for a lasting machine according to any one of claims 1 to 3, characterized in that: The cassette is a U-shaped structure made of PVC, and the outer surface is covered with Teflon.

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