Cloth positioning device of cutting machine

Abstract

The utility model relates to a cloth positioning device of a cutting machine. The cloth positioning device effectively solves the problems that a cloth positioning mechanism of a cloth cutting machine is complex in structure and high in failure rate. According to the technical scheme, the device comprises an installation frame, four horizontal rollers are arranged on the installation frame, each roller is installed on the installation frame through a rotating shaft, the four rollers are installed at the four corners of the installation frame respectively and are arranged in a rhombus shape, the rotating shaft of each roller is eccentrically installed, and the rotating shafts of the rollers are arranged in a rhombus shape. The rotating shaft is eccentric upwards and towards the inner side of the mounting frame at the same time relative to the axis of the roller, a vertical telescopic cylinder is connected to the mounting frame, and the telescopic cylinder can drive the mounting frame to move up and down; the device is simple and stable in structure, free of various kinematic pair matching, low in occurrence rate of faults such as jamming in the using process, easy to use and low in equipment cost.

Description

Technical Field

[0001] The utility model relates to the field of cloth cutting, in particular to a cloth positioning device for a cutting machine. Background Art

[0002] When the cloth cutting machine is cutting, the cloth is prone to wrinkles, affecting the cutting accuracy; the utility model patent with application number 202222308523.5 discloses a cloth positioning mechanism for a clothing cutting machine. This patent uses three sets of sliding pairs and a set of pressure block pressure grooves to push the pressure strips outward during the downward pressure process to flatten the cloth. The structure has many moving pairs, a complex structure, and a loose structure. During use, any jamming of any moving pair will cause the entire structure to fail, and the failure rate is high. Summary of the Invention

[0003] The utility model provides a cloth positioning device for a cutting machine, aiming to solve the problems of complex structure and high failure rate of the cloth positioning mechanism of the cutting machine.

[0004] The technical solution includes a mounting frame, on which are provided four horizontal rollers, each of which is mounted on the mounting frame via a rotating shaft. The four rollers are respectively mounted at the four corners of the mounting frame, and the four rollers are arranged in a diamond shape. The rotating shaft of each roller is eccentrically mounted, and the rotating shaft is eccentrically directed upward and toward the inside of the mounting frame relative to the axis of the roller. A vertical telescopic cylinder is connected to the mounting frame, which can drive the mounting frame to move up and down.

[0005] The outer wall of the roller is wrapped with a rubber layer.

[0006] A torsion spring is installed on each of the rotating shafts.

[0007] A cross-shaped reinforcement frame is provided in the installation frame, and the telescopic cylinder is fixed on the reinforcement frame. The telescopic cylinder is located in the center of the installation frame.

[0008] The utility model has a simple and stable structure, does not have numerous motion pairs, has a low incidence of malfunctions such as jamming during use, is easy to use, and has low equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a top view of the utility model.

[0010] Figure 2 This is the main view of the utility model

[0011] Figure 3 Schematic diagram of the movement process when the roller presses down. DETAILED DESCRIPTION

[0012] In conjunction with the accompanying drawings, the utility model includes a mounting frame 1, which is provided with four horizontal rollers 2, each roller 2 is mounted on the mounting frame 1 via a rotating shaft 3, and the four rollers 2 are respectively mounted at the four corners of the mounting frame 1, and the four rollers 2 are arranged in a diamond shape, and the rotating shaft 3 of each roller 2 is eccentrically mounted, and the rotating shaft 3 is eccentrically positioned upward and toward the inside of the mounting frame 1 relative to the axis of the roller 2. A vertical telescopic cylinder 4 is connected to the mounting frame 1, and the telescopic cylinder 4 can drive the mounting frame 1 to move up and down. When the mounting frame 1 moves downward to press the roller 2 on the cloth, due to the eccentric installation of the rotating shaft 3, the roller 2 will rotate outward due to the eccentric torque, thereby extending the cloth outward.

[0013] The outer wall of the roller 2 is wrapped with a rubber layer 5, which can increase the friction between the roller 2 and the fabric.

[0014] A torsion spring 6 is installed on each of the rotating shafts 3. When the roller 2 rotates outward, it needs to overcome the elastic force of the torsion spring 6; when the roller 2 presses down on the cloth, it needs to reach sufficient pressure to overcome the resistance of the torsion spring 6 and rotate outward, so that the roller 2 and the cloth maintain sufficient pressure, thereby generating sufficient friction.

[0015] A cross-shaped reinforcement frame 7 is provided in the installation frame 1, and the telescopic cylinder 4 is fixed on the reinforcement frame 7. The telescopic cylinder 4 is located in the center of the installation frame 1 to ensure the balance of the installation frame 1 when it is raised or lowered. The telescopic cylinder 4 is any one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder.

[0016] When the utility model is in use, after the cloth is spread flat on the workbench, the telescopic cylinder 4 drives the mounting frame 1 to press down. When the rollers 2 come into contact with the cloth, since the rotating shaft 3 is upwardly and inwardly eccentric relative to the axis of the roller 2, the rollers 2 will be subjected to a torque rotating outward under the downward pressure of the mounting frame 1. As the pressure between the rollers 2 and the cloth increases, the torque gradually increases. When the torque is greater than the resistance of the torsion spring 6, the rollers 2 rotate outward. The four rollers 2 extend the cloth outward from the four corners through the friction with the cloth, thereby flattening the cloth.

[0017] The utility model drives the roller 2 to rotate outwards through the eccentric torque of the roller 2 when pressing down to flatten the cloth outwards. The structure is simple and stable, there are no numerous motion pairs, the incidence of malfunctions such as jamming during use is low, and the use is simple and the equipment cost is low.

Claims

1. A cloth positioning device for a cutting machine, comprising a mounting frame (1), characterized in that: Four horizontal rollers (2) are provided on the mounting frame (1), each roller (2) is mounted on the mounting frame (1) via a rotating shaft (3), the four rollers (2) are respectively mounted at the four corners of the mounting frame (1), and the four rollers (2) are arranged in a diamond shape, the rotating shaft (3) of each roller (2) is eccentrically mounted, and the rotating shaft (3) is eccentrically directed upward and toward the inside of the mounting frame (1) relative to the axis of the roller (2), and the mounting frame (1) is connected to a vertical telescopic cylinder (4), which can drive the mounting frame (1) to move up and down.

2. The cloth positioning device for a cutting machine according to claim 1, characterized in that: The outer wall of the roller (2) is wrapped with a rubber layer (5).

3. The cloth positioning device for a cutting machine according to claim 1, characterized in that: A torsion spring (6) is installed on each of the rotating shafts (3).

4. The cloth positioning device for a cutting machine according to claim 1, characterized in that: A cross-shaped reinforcement frame (7) is provided in the installation frame (1), and the telescopic cylinder (4) is fixed on the reinforcement frame (7). The telescopic cylinder (4) is located at the center of the installation frame (1).

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