Pre-feeding detection device for elastic sewing machine

Abstract

The utility model relates to a pre-feeding detection device for a rubber string machine, which belongs to the technical field of rubber string machines, and comprises a rack, a material clamping and conveying device and a sensing device, a rubber string belt channel is arranged on the rack, the sensing device is positioned at the lower end part of the rubber string belt channel, the material clamping and conveying device is positioned at the middle end part of the rubber string belt channel, and the sensing device is positioned at the lower end part of the rubber string belt channel. The sensing device is used for controlling starting and stopping of the material clamping and conveying device, when sensing the elastic band, the sensing device transmits a signal to the material clamping and conveying device and controls the material clamping and conveying device to stop working, and when the sensing device cannot sense the elastic band, the sensing device transmits a signal to the material clamping and conveying device and controls the material clamping and conveying device to stop working. The pre-feeding detection device for the rubber string machine is reasonable in structure and stable in feeding and controls the clamping and conveying device to continue to work until the sensing device senses the rubber string belt, and the pre-feeding detection device for the rubber string machine is provided with the pre-feeding detection device for the rubber string machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of rubber band machines, in particular to a pre-feeding detection device for rubber band machines. Background Art

[0002] The production of rubber bands usually uses bundles or rolls of rubber bands as raw materials, which are cut and sewn into rings in sections. During this processing, the rubber bands as raw materials require a feeding device to automatically feed them.

[0003] In order to achieve intermittent and uniform feeding in sections, the rubber band needs to be detected. When the rubber band drives the boom to rotate and separates it from the trigger device, a signal is sent to the control system, thereby enabling the feeding motor to feed the material.

[0004] Since different types of rubber bands have different materials, elasticity, sizes, etc., when the rubber band drives the boom to rotate, it must overcome the gravity of the boom itself and the friction generated at the rotating joint during the rotation process. Therefore, the rubber band will undergo a certain deformation in the process, thereby affecting the sewing quality of the sewing area.

[0005] The domestic database has disclosed an application number of 201921415905.X, and the patent name is a detection device in the feeding mechanism of a rubber band machine, which includes a bracket; a feeding channel, which is located on the bracket and can allow the rubber band to pass through; a photoelectric sensor 1, which is arranged on the bracket and the emitted light can extend into the feeding channel; a control unit, which is respectively connected to the photoelectric sensor 1 and the feeding motor in the feeding mechanism; when the rubber band moves in the feeding channel and blocks the light emitted by the photoelectric sensor 1, the photoelectric sensor 1 sends a signal to the control unit, and the control unit sends an operating instruction to the feeding motor in the feeding mechanism; although the above patent can solve the above technical problems, in actual use, since the transmission length of the rubber band is controlled by pre-setting the rotation time, number of turns, etc. by the control unit, the elasticity of the rubber band can easily lead to transmission errors, the rubber band feeding is not very stable, and the length of the delivered rubber band varies. Utility Model Content

[0006] The purpose of the utility model is to provide a pre-feeding detection device for a rubber band machine with reasonable structure and stable feeding.

[0007] The purpose of this utility model is achieved in this way:

[0008] A pre-feeding detection device for a rubber band machine includes a frame, a material clamping and conveying device, and a sensing device. The frame is provided with a rubber band channel. The sensing device is located at the lower end of the rubber band channel. The material clamping and conveying device is located at the middle end of the rubber band channel. The sensing device is used to control the start and stop of the material clamping and conveying device. When the sensing device senses the rubber band, the sensing device transmits a signal to the material clamping and conveying device and controls the material clamping and conveying device to stop working. When the sensing device cannot sense the rubber band, the sensing device transmits a signal to the material clamping and conveying device and controls the material clamping and conveying device to continue working until the sensing device senses the rubber band.

[0009] In the above-mentioned pre-feeding detection device for a rubber band machine, the sensing device is an infrared sensing device.

[0010] In the above-mentioned pre-feeding detection device for a rubber band machine, the infrared sensing device is a grating sensor or a light curtain sensor.

[0011] In the above-mentioned pre-feeding detection device for a rubber band machine, the grating sensor or the light curtain sensor includes a signal transmitter and a signal receiver, and the signal transmitter and the signal receiver are located on both sides of the downwardly moving rubber band.

[0012] In the above-mentioned pre-feeding detection device for the rubber band machine, the clamping and conveying device includes a rotating motor, a feed roller, a clamping cylinder, a clamping roller and a clamping bracket. The feed roller is connected to the rotating shaft of the rotating motor, the clamping bracket is fixed on the frame, and the clamping roller is rotatably set on the clamping bracket. The clamping cylinder is fixed on the frame, and its telescopic shaft is connected to one side of the clamping bracket. The clamping roller approaches or moves away from the feed roller through the clamping cylinder.

[0013] In the above-mentioned pre-feeding detection device for a rubber band machine, the pressing bracket includes a support frame and two rotating rods. The support frame is fixed on the machine frame, and one end of the two rotating rods is rotatably set on the support frame.

[0014] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0015] The sensing device of the utility model is arranged at the lower end of the rubber band channel of the frame. When the sensing device does not detect the rubber band, it will control the material clamping and conveying device to feed the material, and the material clamping and conveying device will convey the rubber band downward. When the sensing device detects the rubber band, the sensing device controls the material clamping and conveying device to stop feeding, so as to ensure that the rubber band always maintains a fixed length and the feeding is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model.

[0017] Figure 2 It is an enlarged view of point A of the present utility model.

[0018] Figure 3 It is a structural schematic diagram of the material clamping and conveying device of the present utility model.

[0019] 1-frame; 3-gripping and conveying device; 4-sensing device; 31-rotating motor;

[0020] 32-feeding roller; 33-pressing cylinder; 34-pressing roller; 35-pressing bracket; 41-signal transmitter;

[0021] 42-signal receiver; 351-support frame; 352-rotating rod. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to specific embodiments of the present invention:

[0023] like Figure 1-Figure 3 The figure shows a pre-feed detection device for a rubber band machine, comprising a frame 1, a clamping and conveying device 3, and a sensing device 4. The frame 1 is provided with a rubber band channel. The sensing device 4 is located at the lower end of the rubber band channel, and the clamping and conveying device 3 is located in the middle of the rubber band channel. The sensing device 4 is used to control the start and stop of the clamping and conveying device 3. When the sensing device 4 senses the rubber band, the sensing device 4 transmits a signal to the clamping and conveying device 3, causing the clamping and conveying device 3 to stop. When the sensing device 4 does not sense the rubber band, the sensing device 4 transmits a signal to the clamping and conveying device 3, causing the clamping and conveying device 3 to continue operating until the sensing device 4 senses the rubber band. The sensing device is located at the lower end of the frame. When the sensing device does not detect the rubber band, the clamping and conveying device is controlled to feed the rubber band downward. When the sensing device detects the rubber band, the sensing device controls the clamping and conveying device to stop feeding. This ensures that the rubber band always maintains a fixed length and stable feeding.

[0024] In the above-mentioned pre-feeding detection device for the rubber band machine, the sensing device 4 is an infrared sensing device, and the infrared sensing device is a grating sensor or a light curtain sensor. The grating sensor or the light curtain sensor includes a signal transmitter 41 and a signal receiver 42, and the signal transmitter 41 and the signal receiver 42 are located on both sides of the downward moving rubber band. Specifically, as long as the rubber band blocks the signal source generated by the signal transmitter and the signal receiver cannot receive the signal source generated by the signal transmitter, the material clamping and conveying device will stop working. When the signal receiver receives the signal source generated by the signal generator, the material clamping and conveying device will start working and continue to convey the rubber band until the signal receiver cannot receive the signal source generated by the signal transmitter.

[0025] In the above-mentioned pre-feeding detection device for the rubber band machine, the clamping and conveying device 3 includes a rotating motor 31, a feed roller 32, a clamping cylinder 33, a clamping roller 34 and a clamping bracket 35. The feed roller 32 is connected to the rotating shaft of the rotating motor 31, the clamping bracket 35 is fixed on the frame 1, and the clamping roller 34 is rotatably set on the clamping bracket 35. The clamping cylinder 33 is fixed on the frame 1, and its telescopic shaft is connected to one side of the clamping bracket 35. The clamping roller 34 approaches or moves away from the feed roller 32 through the clamping cylinder 33. The rubber band is located between the clamping roller and the feed roller. The feed roller is driven to rotate by the rotating motor, and the feed roller and the clamping roller cooperate to convey the rubber band downward.

[0026] In the above-mentioned pre-feeding detection device for the rubber band machine, the clamping bracket 35 includes a support frame 351 and two rotating rods 352. The support frame 351 is fixed on the frame, and one end of the two rotating rods 352 is rotatably set on the support frame 351. Specifically, the clamping roller is rotatably set below the two rotating rods, and the telescopic rod of the clamping cylinder is connected to the rotating rod. The rotating rod is pushed toward the feed roller by the clamping cylinder, so that the rubber band can be pressed on the feed roller to facilitate feeding.

[0027] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pre-feeding detection device for a rubber band machine, characterized in that: The invention comprises a frame (1), a material clamping and conveying device (3) and a sensing device (4), wherein the frame (1) is provided with a rubber band channel, the sensing device (4) is located at the lower end of the rubber band channel, the material clamping and conveying device (3) is located at the middle end of the rubber band channel, and the sensing device (4) is used to control the start and stop of the material clamping and conveying device (3); when the sensing device (4) senses the rubber band, the sensing device (4) transmits a signal to the material clamping and conveying device (3) and controls the material clamping and conveying device (3) to stop working; when the sensing device (4) does not sense the rubber band, the sensing device (4) transmits a signal to the material clamping and conveying device (3) and controls the material clamping and conveying device (3) to continue working until the sensing device (4) senses the rubber band.

2. The pre-feeding detection device for a rubber band machine according to claim 1, characterized in that: The sensing device (4) is an infrared sensing device.

3. The pre-feeding detection device for a rubber band machine according to claim 2, characterized in that: The infrared sensing device is a grating sensor or a light curtain sensor.

4. The pre-feeding detection device for a rubber band machine according to claim 3, characterized in that: The grating sensor or the light curtain sensor both include a signal transmitter (41) and a signal receiver (42), and the signal transmitter (41) and the signal receiver (42) are located on both sides of the downwardly moving elastic band.

5. The pre-feeding detection device for a rubber band machine according to claim 1, 2, 3 or 4, characterized in that: The clamping and conveying device (3) comprises a rotating motor (31), a feeding roller (32), a pressing cylinder (33), a pressing roller (34) and a pressing bracket (35); the feeding roller (32) is connected to the rotating shaft of the rotating motor (31); the pressing bracket (35) is fixed on the frame (1); and the pressing roller (34) is rotatably arranged on the pressing bracket (35); the pressing cylinder (33) is fixed on the frame (1); and its telescopic shaft is connected to one side of the pressing bracket (35); and the pressing roller (34) approaches or moves away from the feeding roller (32) through the pressing cylinder (33).

6. The pre-feeding detection device for a rubber band machine according to claim 5, characterized in that: The pressing bracket (35) comprises a support frame (351) and two rotating rods (352), wherein the support frame (351) is fixed on the frame, and one end of the two rotating rods (352) is rotatably arranged on the support frame (351).

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