Cloth positioning and centering mechanism

Abstract

The utility model discloses a cloth positioning and centering mechanism which comprises a supporting frame, a first guide roller and a second guide roller which are arranged up and down are arranged on the supporting frame, the positioning and centering mechanism is located between the first guide roller and the second guide roller, and the positioning and centering mechanism comprises a lifting support connected with a support in a lifting and sliding mode. A clamping mechanism is arranged on the lifting support, the clamping mechanism is in sliding connection with the lifting support, the cloth penetrates through the middle of the clamping mechanism, the clamping mechanism covers the two sides of the cloth, and a sensor used for detecting the side edge position of the cloth is arranged above the clamping mechanism. When the cloth is centered, the cloth can be prevented from deforming in the clamping and moving process, and the cloth is prevented from rebounding.

Description

Technical Field

[0001] The utility model belongs to the technical field of digital printing equipment, and more specifically relates to a fabric positioning and centering mechanism. Background Technique

[0002] When digital printing high-elastic or ultra-high-elastic fabrics, the fabrics may first be manually scattered from the neatly stacked state to release the tension when stacked. As a result, the fabrics before printing often pile up in a scattered form on the scattering table. After the fabric ends are pulled onto the conveying device, when the fabric is conveyed by the conveying device, since it is scattered, when the fabric is driven upward into the conveying device, its two sides will shift on the rollers of the conveying device. In the traditional method, manual left and right pulling is used to center the fabric.

[0003] For example, the existing patent with the publication number CN218931202U discloses an automatic fabric grasping and edge-aligning device for loose fabric feeding. It is provided with an offset detection mechanism and a fabric grasping mechanism on both sides of the fabric. First, the offset situation of the fabric during conveying is detected by the offset detection mechanism, and then the fabric grasping mechanism grasps the side of the fabric and moves it to achieve centering of the fabric.

[0004] However, when the above mechanism pulls the high-elastic or ultra-high-elastic fabric, since it is one-sided pulling and there is friction between the fabric and the roller, when the jaw pulls the side of the high-elastic fabric, a protruding part will be pulled out at the clamped part, resulting in different moving distances of the jaw and the actual moving distance of the pulled fabric. And when the jaw releases the fabric, the protruding part may rebound and cause the fabric to retreat a short distance, that is, the centering accuracy of the elastic fabric of the above disclosed structure is relatively low. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a fabric positioning and centering mechanism, which can avoid the deformation of the fabric during the clamped movement and avoid the rebound of the fabric.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A fabric positioning and centering mechanism includes a support frame. A first guide roller and a second guide roller are arranged up and down on the support frame. The positioning and centering mechanism is located between the first guide roller and the second guide roller. The positioning and centering mechanism includes a lifting support frame slidably connected to the support frame in a lifting manner. A clamping mechanism is arranged on the lifting support frame. The clamping mechanism is slidably connected to the lifting support frame. The fabric passes through the middle of the clamping mechanism, and the clamping mechanism covers both sides of the fabric. A sensor for detecting the side position of the fabric is arranged above the clamping mechanism.

[0007] Further, the clamping mechanism includes symmetrically arranged clamping plates. A driving mechanism is connected to the clamping plates. The driving mechanism is slidably connected to the lifting support frame.

[0008] Further, a support plate is provided on the lifting bracket, the driving mechanism is slidably connected to the support plate, and the two clamping plates are located between the two support plates.

[0009] Further, the driving mechanism includes a cloth clamping cylinder, a cylinder plate is slidably connected to the support plate, a through groove corresponding to the piston rod of the cloth clamping cylinder is provided on the support plate, and the piston rod of the cloth clamping cylinder passes through the through groove and is connected to the clamping plate.

[0010] Further, clamping plates are provided on both sides of the clamping plate.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: When the conveying mechanism conveys the cloth upward, the cloth on the cloth table starts to be conveyed. When the sensor on one side of the support frame detects the side edge of the cloth, the cloth clamping cylinder drives the clamping plate, and the clamping plates on the two clamping plates clamp the cloth, and at the same time move upward with the cloth, and also move left and right at the same time during the upward movement, pulling the cloth to move left and right between the first guide roller and the second guide roller until the side edge of the cloth is no longer detected by the sensor, and then the clamping plate releases the cloth, and the lifting bracket quickly falls to the lower starting point to complete a positioning and centering. Since the clamping plates clamp both sides of the cloth and the two clamping plates move synchronously, it is possible to prevent the cloth from deforming during the clamped movement and avoid the cloth from rebounding. Description of the Drawings

[0012] Figure 1 It is a schematic side structure view of the cloth positioning and centering mechanism of the present utility model;

[0013] Figure 2 It is a schematic structural view of the clamping mechanism under the top view of the cloth positioning and centering mechanism of the present utility model.

[0014] Reference numerals: support frame 1; first guide roller 2; second guide roller 3; lifting bracket 4; sensor 5; clamping plate 6; support plate 7; cloth clamping cylinder 8; cylinder plate 9; clamping plate 10; cloth table 11; cloth 12. Detailed Embodiments

[0015] In the description of the present utility model, it should be noted that for the orientation terms, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 should not be construed as limiting the specific protection scope of the present utility model.

[0016] In addition, for the terms "first" and "second", they are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise specifically defined.

[0017] Refer to Figure 1 and Figure 2 for further description of the present utility model.

[0018] A fabric positioning and centering mechanism includes a support frame 1. A first guide roller 2 and a second guide roller 3 are arranged up and down on the support frame 1. The positioning and centering mechanism is located between the first guide roller 2 and the second guide roller 3. The positioning and centering mechanism includes a lifting support frame 4 that is slidably connected to the support frame for lifting. A clamping mechanism is arranged on the lifting support frame 4. The clamping mechanism is slidably connected to the lifting support frame 4. The fabric 12 passes through the middle of the clamping mechanism, and the clamping mechanism covers both sides of the fabric 12. A sensor 5 for detecting the side position of the fabric 12 is arranged above the clamping mechanism, and sensors 5 are arranged on both sides of the fabric 12.

[0019] Preferably in this embodiment, the sensor 5 can be an optoelectronic sensor 5. When the side of the fabric 12 blocks the sensor 5, the clamping mechanism clamps and centers the fabric 12.

[0020] As Figure 2 shown, preferably in this embodiment, the clamping mechanism includes symmetrically arranged clamping plates 6. A driving mechanism is connected to the clamping plates 6. The driving mechanism is slidably connected to the lifting support frame 4.

[0021] As Figure 2 shown, preferably in this embodiment, a support plate 7 is arranged on the lifting support frame 4. The driving mechanism is slidably connected to the support plate 7. The two clamping plates 6 are located between the two support plates 7.

[0022] Preferably, in this embodiment, a lead screw and nut lifting mechanism is provided between the lifting bracket 4 and the support bracket 1.

[0023] As Figure 2 shown, preferably, in this embodiment, the driving mechanism includes a cloth clamping cylinder 8. A cylinder plate 9 is slidably connected to the support plate 7. A through groove corresponding to the piston rod of the cloth clamping cylinder 8 is provided on the support plate 7. The piston rod of the cloth clamping cylinder 8 passes through the through groove and is connected to the clamping plate 6.

[0024] Preferably, in this embodiment, a guide rail cylinder can be provided between the cylinder plate 9 and the support plate 7 to quickly drive the cylinder plate 9 to move.

[0025] As Figure 2 shown, preferably, in this embodiment, clamping plates 10 are provided on both sides of the clamping plate 6.

[0026] As Figure 1 and Figure 2 shown, the cloth is scattered and placed on the cloth table 11 on one side of the support bracket 1. First, manually pull the end of the cloth 12 around the lower second guide roller 3, pass upward through between the two clamping plates 6, then bypass the upper first guide roller 2, and finally enter the conveying mechanism of the cloth 12;

[0027] When the conveying mechanism pulls and conveys the cloth 12, the cloth 12 on the cloth table 11 starts to be conveyed. When the sensor 5 on one side of the support bracket 1 detects the side of the cloth 12, the cloth clamping cylinder 8 drives the clamping plate 6. The clamping plates 10 on the two clamping plates 6 clamp the cloth 12, and at the same time move upward with the cloth 12, and also move left and right simultaneously during the upward movement, pulling the cloth 12 to move left and right between the first guide roller 2 and the second guide roller 3 until the side of the cloth 12 is no longer detected by the sensor 5, and then the clamping plate 10 releases the cloth 12. The lifting bracket 4 quickly drops to the lower starting point, completing one positioning and centering. Since the clamping plates 10 clamp both sides of the cloth 12 and the two clamping plates 10 move synchronously, it can avoid the deformation of the cloth 12 during the clamped movement and avoid the rebound of the cloth 12.

[0028] Preferably, in this embodiment, the conveying speed of the conveying mechanism for the cloth 12 can ensure that the fabric remains in the centered state when the lifting bracket 4 descends and returns, that is, the conveying speed is relatively slow.

[0029] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A cloth positioning and pulling mechanism, characterized in that: It includes a support frame, on which a first guide roller and a second guide roller are provided, the positioning and pulling mechanism is located between the first guide roller and the second guide roller, the positioning and pulling mechanism includes a lifting bracket that is connected to the bracket in a lifting and sliding manner, the lifting bracket is provided with a clamping mechanism, the clamping mechanism is connected to the lifting bracket in a sliding manner, the cloth passes through the middle of the clamping mechanism, and the clamping mechanism covers both sides of the cloth, and a sensor for detecting the side position of the cloth is provided above the clamping mechanism.

2. The cloth positioning and centering mechanism according to claim 1, characterized in that: The clamping mechanism comprises symmetrically arranged clamping plates, the clamping plates are connected with a driving mechanism, and the driving mechanism is slidably connected with the lifting bracket.

3. The cloth positioning and centering mechanism according to claim 2, characterized in that: A support plate is arranged on the lifting bracket, the driving mechanism is slidably connected to the support plate, and the two clamping plates are located between the two support plates.

4. The cloth positioning and centering mechanism according to claim 3, characterized in that: The driving mechanism comprises a cloth clamping cylinder, a cylinder plate is slidably connected to the support plate, a through slot corresponding to the piston rod of the cloth clamping cylinder is arranged on the support plate, and the piston rod of the cloth clamping cylinder passes through the through slot and is connected to the clamping plate.

5. The cloth positioning and centering mechanism according to claim 4, characterized in that: Clamping plates are arranged on both sides of the clamping plate.

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