Fabric conveying device

Abstract

The utility model discloses a fabric conveying device which comprises two rails which are respectively arranged on two sides of a fabric in the breadth direction, and a group of edge following units are respectively arranged on the side where each rail is arranged. Each group of selvedge tracking unit comprises a first selvedge detection assembly for detecting selvedges and a rail swinging mechanism for driving a rail to swing horizontally, and a second selvedge detection assembly for detecting fabric notches is further mounted at the front end of each first selvedge detection assembly; the second selvage detection assembly is located on a transmission path of the fabric on the fabric feeding device, and the second selvage detection assembly is closer to a middle line of the fabric in the breadth direction than the needle feeding point; the first selvage detection assembly, the second selvage detection assembly and the track swing mechanism are in communication connection with a controller. The problem of needle falling during fabric feeding is solved, and the fabric feeding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to dyeing and finishing equipment, in particular to a fabric conveying device. Background Art

[0002] During the whole process of dyeing and finishing, according to the requirements of the processing technology, it is necessary to dry, stentering and shaping the fabric to be processed. Before the fabric enters these equipment for processing, the selvages at both ends in the width direction of the fabric should be respectively hung on the needle plates of the corresponding equipment tracks. For example, a stentering machine is respectively provided with a track on both sides in the width direction of the fabric, and there is a set of rotating chain components on each track. The needle plates / clamps on the chain components fix both ends of the fabric to be processed. When the two tracks are pulled outwards, the fabric can be pulled to the required width dimension.

[0003] As Figure 1 shown, the device includes two selvage detection components (1', 2') and two track swing mechanisms (3', 4'). The selvage detection components (1', 2') are respectively arranged on both sides in the width direction of the fabric. One of the track swing mechanisms (3', 4') is installed below each track (10', 20'). When the selvage detection components (1', 2') detect the selvage, the control system sends an instruction to the track swing mechanism (3', 4'), and the track swing mechanism (3', 4') drives the corresponding track (10', 20') to swing, ensuring that the left and right needle plates (101', 201') are respectively centered on the left and right selvages of the fabric 100'. Then, the fabric is pressed by the brush wheel and hung on the needle plate, so as to accurately hang the left and right selvages of the fabric on the left and right track needle plates.

[0004] However, during the actual operation of the equipment, as Figure 1 shown, since there will occasionally be some large gaps 1001' at the selvages of the fabric 100', such as the joint and cracking parts. When the selvage detection components (1', 2') detect the front edge of the gap, the track swing mechanism (3', 4') starts to drive the track (10', 20') to swing inwards. However, the curvature of the selvage with a large gap shrinking inwards is very large. When the selvage detection components (1', 2') etc. detect the selvage with a large gap and then control the track (10', 20') to swing inwards, the swing speed can no longer keep up with the shrinking speed of the selvage with a gap, resulting in the phenomenon of needle dropping. Only an emergency stop and manual hanging of the fabric can be carried out. In view of this, it is necessary to improve the structure of the existing infrared selvage tracking device to improve the fabric feeding efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a fabric conveying device.

[0006] The technical solution for achieving the object of the present utility model is as follows: A fabric conveying device includes two tracks respectively installed on both sides in the fabric width direction. Each of the tracks is fixedly installed with a track housing. A set of edge-tracking units is installed on each side where the track is located. Each set of edge-tracking units includes a first fabric-edge detection component for detecting the fabric edge and a track swing mechanism for driving the track on the same side as the edge-tracking unit to swing horizontally. A fabric feeding device is installed at the front ends of the two tracks. A fabric-edge clamping mechanism is installed on each track. The point where the fabric is clamped by the fabric-edge clamping mechanism after leaving the fabric feeding device is the upper needle point. The first fabric-edge detection component is installed on the track housing, and the first fabric-edge detection component is located between the fabric feeding device and the upper needle point on the same side as the first fabric-edge detection component. The track swing mechanism is connected to the track housing; A second fabric-edge detection component for detecting fabric gaps is further installed at the front end of each first fabric-edge detection component. The second fabric-edge detection component is located on the transmission path of the fabric on the fabric feeding device, and the second fabric-edge detection component is closer to the middle line in the fabric width direction than the upper needle point; The first fabric-edge detection component, the second fabric-edge detection component, and the track swing mechanism are respectively communicatively connected to the controller.

[0007] Further, the fabric-edge clamping mechanism is a needle plate or a fabric clip.

[0008] Further, the second fabric-edge detection component is an infrared detection tube, and the infrared detection tube is fixedly installed on the machine frame. The infrared detection tube can increase the detection range of the second fabric-edge detection component and improve the detection efficiency.

[0009] Further, the infrared detection tube is parallel to the fabric width direction, and the length of the infrared detection tube is limited to cover the maximum width of the fabric.

[0010] By adding the second fabric-edge detection component on the transmission path of the fabric on the fabric feeding device in the present utility model, when the second fabric-edge detection component feeds back a signal to the controller, the control system can calculate the swing speed according to the parameters set by the system and quickly move to the fabric gap. Then, the fabric-edge clamping mechanism grabs and clamps the fabric edge at the fabric gap. Next, the track returns to the normal position, drives the fabric to be pulled towards both sides, uses the elasticity of the fabric to make the fabric gap smaller, and then feeds the fabric normally for needle insertion, thereby solving the problem of needle dropping and improving the fabric feeding efficiency. Description of the Drawings

[0011] Figure 1 It is a top view structural schematic diagram of the infrared fabric-edge tracking device described in the background art of the present utility model;

[0012] Figure 2The front view structural schematic diagram of the fabric conveying device according to the embodiment of the present utility model;

[0013] Figure 3 The top view structural schematic diagram of the first usage state of the fabric conveying device according to the embodiment of the present utility model;

[0014] Figure 4 The top view structural schematic diagram of the second usage state of the fabric conveying device according to the embodiment of the present utility model.

[0015] Wherein, the arrow represents the moving direction of the fabric. Specific embodiments

[0016] The following will describe in detail the preferred embodiments of the present utility model with reference to the accompanying drawings.

[0017] As Figure 2 and Figure 3 shown, a fabric conveying device includes two tracks 1 respectively installed on both sides in the fabric width direction. Each of the tracks 1 is fixedly installed with a track housing 11. A set of edge chasing units 2 are respectively installed on each side where each track 1 is located. Each set of the edge chasing units 2 includes a first cloth edge detection component 21 for detecting the fabric edge 1001 and a track swing mechanism 22 for driving the track 1 on the same side as the edge chasing unit to swing horizontally. The front ends of the two tracks 1 are respectively installed with a fabric feeding device 20. A cloth edge clamping mechanism 12 is installed on each of the tracks 1. The point where the fabric 100 is clamped by the cloth edge clamping mechanism 12 after leaving the fabric feeding device 20 is the upper needle point A. The first cloth edge detection component 21 is installed on the track housing 11, and the first cloth edge detection component 21 is located between the fabric feeding device 20 and the upper needle point A on the same side as the first cloth edge detection component 21. The track swing mechanism 22 is connected to the track housing 101; a second cloth edge detection component 23 for detecting the fabric notch 1002 is further installed at the front end of each first cloth edge detection component 21. The second cloth edge detection component 23 is installed on the track housing 21 through a second cloth edge detection component bracket 231. The second cloth edge detection component 23 is located on the transmission path of the fabric 100 on the fabric feeding device 20, and the second cloth edge detection component 23 is closer to the center line C in the width direction of the fabric 100 than the upper needle point A; the first cloth edge detection component 21, the second cloth edge detection component 22, and the track swing mechanism 23 are respectively in communication connection with the controller.

[0018] Both the first cloth edge detection component and the second cloth edge detection component in this embodiment are infrared probes.

[0019] The control method of the fabric conveying device includes:

[0020] 1) As shown in Figure 3 , when the fabric edge 1001 does not fall into the sensing area of the second fabric edge detection component 23, it means that there is a notch in the fabric at this point. At this time, the second fabric edge detection component 23 feeds back a signal to the controller;

[0021] 2) The controller issues an instruction, and the track swing mechanism 22 on the same side as the second fabric edge detection component that feeds back the notch signal drives the track 1 above the track swing mechanism to swing towards the center line C in the fabric width direction. The swing speed of the track is limited by V 摆 > L * V 布 / L1, which can ensure that the time for the track to swing in place is faster than the time for the fabric to advance to the upper needle point before swinging. Where: V 摆 —The swing speed of the track, mm / s; L—The horizontal distance between the upper needle point and the second fabric edge detection component in the width direction, mm; V 布 —The fabric feeding speed, mm / s; L1—The length of the fabric between the upper needle point and the second fabric edge detection component, mm;

[0022] 3) As shown in Figure 4 , when the upper needle point A swings in place along with the track 1, the fabric edge 1001 falls into the sensing area of the first fabric edge detection component 21, and the fabric edge clamping mechanism 12 at the upper needle point A hooks and clamps the fabric edge at this point;

[0023] 4) Then, the track swing mechanism on the same side as the second fabric edge detection component that feeds back the notch signal drives the track above the track swing mechanism to return to the original position;

[0024] 5) When the second fabric edge detection component detects a fabric notch again, repeat steps 1)-4).

[0025] The first cloth edge detection component and the second cloth edge detection component described in the present utility model can be infrared cloth edge tracking detection components as disclosed in Chinese Patent No. CN202021510298.8, and the track swing mechanism can be a one-piece cloth edge tracking device for a setting machine as disclosed in Chinese Patent No. 202020751443.5, which is not an innovation of the present utility model and will not be elaborated here; the second cloth edge detection component can be an infrared probe or an infrared detection tube. When the second cloth edge detection component is an infrared probe, it is installed on the track housing and can thus swing with the track, so as to fix the horizontal distance in the width direction between the upper needle point and the second cloth edge probe; the infrared detection tube can cover the maximum width of the fabric to increase the detection range of the second cloth edge detection component, and in this case, it can be directly and fixedly installed on the machine frame; the cloth edge clamping mechanism can be a needle plate or cloth clips; in addition, the terms "first" and "second" are only used for distinguishing the same structural members and cannot be construed as indicating or implying relative importance.

[0026] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent process transformation made by using the content of the specification of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A fabric conveying device, which comprises two tracks respectively installed on both sides in the fabric width direction, track enclosures are fixedly installed on each of the tracks, a set of edge chasing units are respectively installed on each side where the tracks are located, each set of the edge chasing units includes a first fabric edge detection assembly for detecting the fabric edge and a track swing mechanism for driving the track on the same side as the edge chasing unit to swing horizontally, a fabric feeding device is installed at the front ends of the two tracks, a fabric edge clamping mechanism is installed on each of the tracks, the point where the fabric is clamped by the fabric edge clamping mechanism after leaving the fabric feeding device is the upper needle point, the first fabric edge detection assembly is installed on the track enclosure, and the first fabric edge detection assembly is located between the fabric feeding device and the upper needle point on the same side as the first fabric edge detection assembly, the track swing mechanism is connected to the track enclosure; characterized in that: A second fabric edge detection component for detecting fabric gaps is further installed at the front end of each of the first fabric edge detection components. The second fabric edge detection component is located on the transmission path of the fabric on the fabric feeding device, and the second fabric edge detection component is closer to the center line in the fabric width direction than the upper needle point. The first fabric edge detection component, the second fabric edge detection component, and the track swing mechanism are respectively communicatively connected to a controller.

2. The fabric conveying device according to claim 1, wherein: The second fabric edge detection component is installed on the track housing through a second fabric edge detection component bracket.

3. The fabric conveying device according to claim 1, wherein: The fabric edge clamping mechanism is a needle plate or a fabric clip.

4. The fabric conveying device according to claim 1, wherein: The second fabric edge detection component is an infrared detection tube, and the infrared detection tube is fixedly installed on the machine frame.

5. The fabric conveying device according to claim 4, wherein: The infrared detection tube is parallel to the width direction of the fabric, and the length of the infrared detection tube is limited to cover the maximum width of the fabric.

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