Anti-edge-falling selvedge chasing device

Abstract

The invention discloses an anti-edge-falling selvedge tracking device which comprises two sets of selvedge tracking units, and each set of selvedge tracking unit comprises a first selvedge probe used for detecting selvedges and a track swing mechanism used for driving a track to swing horizontally. The front end of each first selvage probe is also provided with a second selvage probe for detecting a fabric gap, and the second selvage probes are positioned on a transmission path of the fabric on the cloth feeding device and are closer to a middle line in the width direction of the fabric than the needle feeding points; the second selvage probe can swing along with the track on the same side as the second selvage probe; the first selvage probe, the second selvage probe and the track swing mechanism are respectively in communication connection with a controller. The problem of needle falling is solved, and the cloth feeding efficiency is improved.

Description

Technical Field

[0001] The invention relates to dyeing and finishing equipment, in particular to an edge chasing device for preventing edge dropping. Background Art

[0002] During the whole process of dyeing and finishing, the processed fabric needs to be dried, stretched and set according to the requirements of the processing technology. Before the fabric enters these equipment for processing, the edges of the fabric at both ends of the width direction of the fabric should be hung on the needle plates of the corresponding equipment tracks. For example, the stretching and setting machine is equipped with a track on both sides of the fabric width direction, and each track has a set of rotating chain components. The needle plates / cloth clips on the chain components will fix the two ends of the processed fabric. When the two tracks are pulled outward, the fabric can be pulled to the required width.

[0003] like Figure 1 As shown, the device comprises two cloth edge probes (1', 2') and two track swing mechanisms (3', 4'), wherein the cloth edge probes (1', 2') are respectively arranged on both sides of the fabric width direction, and one track swing mechanism (3', 4') is installed under each track (10', 20'). When the cloth edge probes (1', 2') detect the cloth edge, the control system sends a command (3', 4') to the track swing mechanism, 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 aligned with the left and right cloth edges of the fabric 100', and then the fabric is pressed on the needle plate by a brush wheel, so that the left and right track needle plates accurately hang the left and right cloth edges of the fabric.

[0004] However, during the actual operation of the equipment, Figure 1 As shown, since there are occasionally some large gaps 1001' on the edge of the fabric 100', such as the joining part and the cracking part, the track swing mechanism (3', 4') starts to drive the track (10', 20') to swing inward when the edge probe (1', 2') detects the front edge of the gap, but the curvature of the edge of the large gap shrinking inward is very large. When the edge probe (1', 2') detects the edge of the large gap and controls the track (10', 20') to swing inward, the swing speed cannot keep up with the shrinking speed of the edge of the gap, which will cause the needle to fall off, and the machine can only be shut down urgently and the cloth can be hung manually. In view of this, it is necessary to improve the structure of the existing infrared edge tracking device to improve the efficiency of feeding cloth. Summary of the invention

[0005] The purpose of the present invention is to provide a device for preventing edge dropping and tracing the edge of a cloth.

[0006] The technical scheme for realizing the purpose of the present invention is: a device for chasing edge of fabric to prevent edge from falling off, comprising two groups of chasing edge units arranged on both sides of the fabric width direction, a track is respectively installed on both sides of the fabric width direction, a track cover is fixedly installed on each track, each group of the chasing edge units comprises a first fabric edge probe for detecting the fabric fabric edge and a track swing mechanism for driving the track on the same side of the chasing edge unit to swing horizontally, a cloth feeding device is installed at the front end of the two tracks, a cloth edge clamping mechanism is installed on each track, the point where the fabric is clamped by the cloth edge clamping mechanism after the fabric is discharged from the cloth feeding device is the upper needle point, the first fabric edge probe is installed on the track The track cover is provided with a first fabric edge probe, and the first fabric edge probe is located between the fabric feeding device and the upper needle point on the same side as the first fabric edge probe, and the track swing mechanism is connected to the track cover; a second fabric edge probe for detecting fabric gaps is also installed at the front end of each of the first fabric edge probes, and the second fabric edge probe is installed on the track cover through a second fabric edge probe bracket, the second fabric edge probe is located on the transmission path of the fabric on the fabric feeding device, and the second fabric edge probe is closer to the middle line of the fabric in the width direction than the upper needle point; the first fabric edge probe, the second fabric edge probe and the track swing mechanism are respectively connected to the controller for communication.

[0007] Furthermore, the control method of the edge-drop prevention and edge-tracking device includes: 1) When the fabric edge does not fall into the sensing area of ​​the second fabric edge probe, it means that the fabric has a gap at that location, and the second fabric edge probe feeds back a signal to the controller; 2) The controller issues a command, and the track swing mechanism on the same side as the second fabric edge probe that feedbacks the gap signal drives the track above the track swing mechanism to swing toward the middle line in the fabric width direction, and the swing speed of the track is V 摆 >L*V 布 / L 1 As a limit, where: V 摆 —swing speed of the track, mm / s; L—horizontal distance between the upper needle point and the second edge probe along the width direction, mm; V 布 — cloth feeding speed, mm / s; L 1 —The length of the fabric between the upper needle point and the second fabric edge probe, mm; 3) When the needle-up point swings into position along with the track, the fabric edge falls into the sensing area of ​​the first fabric edge probe, and the fabric edge clamping mechanism at the needle-up point hooks and clamps the fabric edge at that location; 4) Then the track swing mechanism on the same side as the second fabric edge probe that feeds back the gap signal drives the track above the track swing mechanism to return to the normal position; 5) When the second fabric edge probe detects a fabric gap again, repeat steps 1) to 4).

[0008] Furthermore, the cloth edge clamping mechanism is a needle plate or a cloth clip.

[0009] Furthermore, the second fabric edge probe is an infrared detection tube, which can increase the detection range of the second fabric edge probe and improve detection efficiency.

[0010] Furthermore, the infrared detection tube is parallel to the width direction of the fabric, and the length of the infrared detection tube is limited to the maximum width of the fabric that can be covered.

[0011] Furthermore, the infrared detection tube is fixedly mounted on the frame.

[0012] The present invention adds the second fabric edge probe on the transmission path of the fabric on the cloth feeding device, and sets the second fabric edge probe to swing with the track, so as to fix the horizontal spacing and the vertical spacing between the needle insertion point and the second fabric edge probe, so that when the second fabric edge probe 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, and then the fabric edge at the fabric gap is grasped and clamped by the fabric edge clamping mechanism, and then the track returns to the center, driving the fabric to be pulled to both sides, and the elasticity of the fabric is used to reduce the fabric gap, and then the fabric is fed and the needle is inserted normally, thereby solving the needle drop phenomenon and improving the fabric feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic top view of the structure of the infrared cloth edge tracking device described in the background technology of the present invention; Figure 2 It is a schematic diagram of the main structure of the device for tracing the edge of a cloth to prevent edge drop according to an embodiment of the present invention; Figure 3 A schematic top view of the structure of the edge tracking device for preventing edge drop according to an embodiment of the present invention in the first use state; Figure 4 It is a schematic top view of the structure of the second usage state of the edge tracking device for preventing edge drop according to an embodiment of the present invention.

[0014] The arrows represent the direction of movement of the fabric. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0016] like Figure 2 and Figure 3As shown, a device for chasing edge of fabric to prevent edge falling comprises two groups of chasing edge units 1 arranged on both sides of the fabric width direction, a track 10 is respectively installed on both sides of the fabric width direction, and a track cover 101 is fixedly installed on each track 10, each group of the chasing edge units 1 comprises a first fabric edge probe 11 for detecting the fabric fabric edge 1001 and a track swing mechanism 12 for driving the track 10 on the same side of the chasing edge unit to swing horizontally, a cloth feeding device 20 is respectively installed at the front end of the two tracks 10, and a cloth edge clamping mechanism 102 is installed on each track 10, the point where the fabric 100 is clamped by the cloth edge clamping mechanism 102 after the fabric 100 is discharged from the cloth feeding device 20 is the upper needle point A, the first fabric edge probe 11 is installed on the track cover 101, and the first fabric edge probe 11 is installed on the track cover 101, and the first fabric edge probe 11 is installed on the track cover 101. A fabric edge probe 11 is located between the fabric feeding device 20 and the needle point A on the same side as the first fabric edge probe 11, and the track swing mechanism 12 is connected to the track cover 101; a second fabric edge probe 13 for detecting the fabric gap 1002 is also installed at the front end of each first fabric edge probe 11, and the second fabric edge probe 13 is installed on the track cover 101 through a second fabric edge probe bracket 131, and the second fabric edge probe 13 is located on the transmission path of the fabric 100 on the fabric feeding device 20, and the second fabric edge probe 13 is closer to the middle line C in the fabric width direction (indicated by the number) than the needle point A; the first fabric edge probe 11, the second fabric edge probe 12 and the track swing mechanism 13 are respectively connected to the controller for communication; The control method of the edge-dropping prevention and edge-chasing device comprises: 1) If Figure 3 As shown, when the fabric edge 1001 does not fall into the sensing area of ​​the second fabric edge probe 13, it means that the fabric has a gap there. At this time, the second fabric edge probe 13 feeds back a signal to the controller; 2) The controller issues a command, and the track swing mechanism 12 on the same side as the second fabric edge probe 13 that feeds back the gap signal drives the track 10 above the track swing mechanism to swing toward the middle line in the fabric width direction, and the swing speed of the track is V 摆 >L*V 布 / L 1 The limit is V, which can ensure that the time for the track to swing into place is faster than the time for the fabric to advance to the needle point before swinging, where: V 摆 —swing speed of the track, mm / s; L—horizontal distance between the upper needle point and the second edge probe along the width direction, mm; V 布 — cloth feeding speed, mm / s; L 1 —The length of the fabric between the upper needle point and the second fabric edge probe, mm; 3) If Figure 4 As shown, when the needle-up point A swings into position with the track 10, the fabric edge 1001 falls into the sensing area of ​​the first fabric edge probe 11, and the fabric edge clamping mechanism 102 of the needle-up point A hooks and clamps the fabric edge at that location; 4) Then the track swing mechanism on the same side as the second fabric edge probe that feeds back the gap signal drives the track above the track swing mechanism to return to the normal position; 5) When the second fabric edge probe detects a fabric gap again, repeat steps 1) to 4).

[0017] The first fabric edge probe and the second fabric edge probe of the present invention may be infrared fabric edge tracking probes as disclosed in Chinese Patent No. CN202021510298.8, and the track swing mechanism may be an integrated fabric edge tracking device of a forming machine as disclosed in Chinese Patent No. 202020751443.5, which is not an innovation of the present invention and will not be described herein; the second fabric edge probe may also be an infrared detection tube, which is parallel to the fabric width direction, and the length of the infrared detection tube is limited to the maximum width of the fabric that can be covered, so as to increase the detection range of the second fabric edge probe, and when the infrared detection tube is used, the infrared detection tube can be directly fixed on the frame; the fabric edge clamping mechanism may be a needle plate or a cloth clip; in addition, the terms "first" and "second" are only used to distinguish between the same structural parts, and cannot be understood as indicating or implying relative importance.

[0018] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent process changes made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for chasing edge of fabric to prevent edge from falling off, comprising two groups of chasing edge units arranged on both sides of the fabric width direction, a track is respectively installed on both sides of the fabric width direction, a track cover is fixedly installed on each track, each group of the chasing edge units comprises a first fabric edge probe for detecting the fabric fabric edge and a track swing mechanism for driving the track on the same side of the chasing edge unit to swing horizontally, a cloth feeding device is installed at the front end of the two tracks, a cloth edge clamping mechanism is installed on each track, the point where the fabric is clamped by the cloth edge clamping mechanism after the fabric is discharged from the cloth feeding device is the upper needle point, the first fabric edge probe is installed on the track cover, and the first fabric edge probe is located between the cloth feeding device and the upper needle point on the same side as the first fabric edge probe, and the track swing mechanism is connected to the track cover; characterized in that: A second fabric edge probe for detecting fabric gaps is also installed at the front end of each of the first fabric edge probes. The second fabric edge probe is installed on the track cover through a second fabric edge probe bracket. The second fabric edge probe is located on the transmission path of the fabric on the fabric feeding device, and the second fabric edge probe is closer to the middle line in the fabric width direction than the upper needle point. The first fabric edge probe, the second fabric edge probe and the track swing mechanism are respectively communicated with the controller.

2. The edge-chasing device for preventing edge drop according to claim 1 is characterized in that: The control method of the edge-dropping prevention and edge-chasing device comprises: 1) When the fabric edge does not fall into the sensing area of ​​the second fabric edge probe, it means that the fabric has a gap at that location, and the second fabric edge probe feeds back a signal to the controller; 2) The controller issues a command, and the track swing mechanism on the same side as the second fabric edge probe that feedbacks the gap signal drives the track above the track swing mechanism to swing toward the middle line in the fabric width direction, and the swing speed of the track is V 摆 >L*V 布 / L1 is the limit, where: V 摆 —the swing speed of the track, mm / s; L—the horizontal distance between the upper needle point and the second edge probe along the width direction, mm; V 布 — cloth feeding speed, mm / s; L1—the length of the fabric between the upper needle point and the second cloth edge probe, mm; 3) When the needle-up point swings into position along with the track, the fabric edge falls into the sensing area of ​​the first fabric edge probe, and the fabric edge clamping mechanism at the needle-up point hooks and clamps the fabric edge at that location; 4) Then the track swing mechanism on the same side as the second fabric edge probe that feeds back the gap signal drives the track above the track swing mechanism to return to the normal position; 5) When the second fabric edge probe detects a fabric gap again, repeat steps 1) to 4).

3. The edge tracking device for preventing edge drop according to claim 1 is characterized in that: The cloth edge clamping mechanism is a needle plate or a cloth clip.

4. The edge tracking device for preventing edge drop according to claim 1, characterized in that: The second cloth edge probe is an infrared detection tube.

5. The edge tracking device for preventing edge drop according to claim 4 is characterized in that: The infrared detection tube is parallel to the width direction of the fabric, and the length of the infrared detection tube is limited to the maximum width of the fabric that can be covered.

6. The edge tracking device for preventing edge drop according to claim 4, characterized in that: The infrared detection tube is fixedly installed on the frame.

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