JP2003252503A - Belt conveyer device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect a discharge state of a continuous band discharged from a conveyer belt to a next process and to control a receiving speed of the next process and a working process, in a belt conveyer device for conveying the flexible continuous band delivered from a previous process to the next process. <P>SOLUTION: The belt conveyer device comprises a first sensor for detecting that receiving speed of the next process becomes abnormally lower than a conveying speed of the conveyer belt by detecting a behavior of the continuous band, a third sensor for detecting that the receiving speed of the next process becomes abnormally higher than the conveying speed of the conveyer belt by detecting a behavior of the continuous band, and a second sensor disposed in a predetermined region between the first sensor and the third sensor and for controlling the receiving speed of the next process by detecting variation of a standing position of the continuous band. The receiving speed of the next process or each working process is controlled based on the detection by each sensor. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor device for conveying a flexible continuous belt carried out from a previous step to a next step, and discharging the continuous belt discharged from the conveyor belt to the next step. The present invention relates to a belt conveyor device having a sensor for detecting a state.

[0002]

2. Description of the Related Art Conventionally, as a transfer system for continuously transferring a continuous strip discharged from a previous process to a next process, there is a change between a discharge speed from the previous process and a take-up speed of the next process. Even if it occurs, a transport system has been used in which the speed is adjusted by using dancer rollers during the working process so that the change can be dealt with. However, in the transport system using the dancer roller, when the continuous belt has flexibility, the dancer roller causes the flexible portion to extremely extend, and in order to cope with the speed change, a large number of dancer rollers are used. It was necessary to arrange them, which required a space for arranging a large number of dancer rollers. Further, when the dancer roller pulls the flexible product to the extreme, not only the reliability of the product is impaired, but also the work in the next process may be hindered.

In particular, when the flexible continuous body is a fiber tow, the quality may vary due to the change of the staying time on the conveyor belt. Therefore, there has been a demand for the development of an apparatus capable of adjusting the transport speed of a flexible continuous belt between working steps.

[0004]

According to the present invention, a belt conveyor device is used as a conveying system to be arranged between processes, and a flexible continuous belt discharged from a previous process is transferred to the next process using the same conveyor belt. The conveyor belt is carried to the next process by continuously pulling up the continuous belt from the downstream side of the conveyor belt to the upper side of the conveyor belt, and the discharging speed between the process before and after sandwiching the conveyor belt by the conveyor belt. Even if there is a difference between the take-up speed and the take-up speed, the purpose is to control the take-up speed in the next step to cope with the change in the speed difference. Another object of the present invention is to provide a belt conveyor device equipped with a sensor capable of controlling the take-up speed in the next process and controlling the work processes before and after the belt conveyor device is sandwiched in order to achieve the same object.

[0005]

The objects of the present invention can be achieved by the inventions described in claims 1 to 6 of the present invention. That is, the invention according to claim 1 of the present application is arranged between the previous step and the next step, receives the flexible continuous band discharged from the previous step on the conveyor belt, and from the downstream side of the conveyor belt. In a belt conveyor device that conveys to the next step while pulling upward against the self-weight of the continuous zone, the fact that the take-up speed in the next step is abnormally slower than the convey speed of the conveyor belt A first sensor for detecting by behavior detection, and a third sensor for detecting by abnormal behavior of the continuous belt that the take-up speed in the next step is abnormally higher than the conveying speed of the conveyor belt,
A belt conveyor, which is arranged in a predetermined area between the first sensor and the third sensor, and is provided with a second sensor which controls a take-up speed in the next step by detecting a change in the rising position of the continuous band. On the device.

According to the present invention, a conveyor belt having a flexible continuous band disposed between working steps can serve as a buffer function, and at the same time, three types of sensors arranged on the belt conveyor device can be used. The take-up speed in the next process is abnormally slower than the convey speed of the conveyor belt, and the continuous zone is not discharged to the next process side and reaches the vicinity of the downstream end of the conveyor belt. It is possible to detect an abnormal state in which the take-up speed becomes abnormally high and the continuous belt cannot be pulled up from the proper continuous belt pulling position. Further, it is possible to control the take-up speed in the next process by detecting the fluctuation of the rising position of the continuous band within the allowable rising position range of the continuous band.

Thus, particularly when the fiber tow is conveyed as a continuous zone, the bulk and staying time of the fiber tow on the conveyor can be kept substantially constant, and the water content and crimp set in the tow can be set. It can be carried into the next process without changing the condition.

As a buffer function, by lowering the convey speed of the conveyor belt from the discharge from the previous process,
This can be achieved by placing the continuous strip having flexibility on the conveyor belt in a gradually compressed state. The continuous band can be pulled up while twisting the continuous band. According to the invention of claim 2, in addition to the configuration of claim 1, the first sensor is
It is a belt conveyor device that limits the items that are sensors that detect pressure from a continuous strip. According to the present invention, an abnormal state in which the continuous belt is not discharged to the next process side and reaches the downstream end of the conveyor belt can be detected by pressing the first sensor by the continuous body.

The first sensor is a sensor for detecting the rotation of the rotary plate arranged on the conveyor belt,
Use a piezoelectric sensor arranged at the downstream end of the conveyor belt, a proximity sensor, a sensor that detects the height of a continuous belt on the downstream side of the conveyor belt, for example, a sensor that detects the height of a linear sensor arranged vertically from the belt surface. be able to. Any sensor can be used as long as it can detect an abnormal state in which the continuous belt is not discharged to the next process side and reaches the downstream end of the conveyor belt. When the proximity switch is used as the first sensor, if the continuous band is pulled up while being twisted from the rising position of the continuous band, in particular, in the reflection type proximity sensor, the reflected light from the continuous band can be reliably received by the light receiving element. it can. By using the infrared photoelectric tube as the proximity sensor, it is possible to prevent malfunction due to an interior light. The invention according to claim 3 is, in addition to the configuration of claim 1 or 2, a belt conveyor device in which the second sensor is a linear sensor. In the present invention, the take-up speed of the next process can be controlled according to the rising position of the continuous band detected by the second sensor, and the discharge speed of the continuous band from the previous process and the take-up of the continuous band in the next work process can be controlled. Even if a speed difference occurs in the speed and the rising position of the continuous band changes, the speed difference can be adjusted by controlling the take-up speed in the next process.

As the second sensor, a plurality of photoelectric sensors are arranged along the conveying direction of the conveyor belt, and by detecting at which position of the photoelectric sensor the pulled continuous band crosses the photoelectric sensor, The take-up speed of the process can be controlled. In addition, a linear sensor is used to allow a wide range of detection for the rising position of the continuous band, and it is detected how far apart the standing position is compared to the reference rising position, and the next position is detected according to the detected position. It is also possible to control the take-up speed of the process. As the linear sensor, a plurality of linear sensors may be arranged along the conveying direction of the belt, or a single linear sensor may be used to detect the rising position of the continuous band. Further, by using a photoelectric tube utilizing infrared rays as the linear sensor, it is possible to prevent malfunction due to an interior light.

The invention according to claim 4 is a belt conveyor device, wherein in addition to the structure according to any one of claims 1 to 3, the third sensor is a proximity sensor. In this invention, the take-up speed in the next process becomes abnormally faster than the conveying speed of the conveyor belt, and the proximity sensor detects an abnormal state in which the starting position is abnormally upstream from the starting position of the proper continuous band. It can be detected by a third sensor. As the proximity sensor as the third sensor,
It is possible to use a photoelectric sensor in which a light emitting element and a light receiving element are integrated, an ultrasonic sensor, a photoelectric sensor in which the light emitting element and the light receiving element face each other across the width of the conveyor belt.

The invention according to claim 5 is, in addition to the structure of claim 4, a reflection type for detecting the continuum which is pulled up while the continuous band is twisted from the rising position and is pulled up while the third sensor is twisted. It is located on a belt conveyor device with limited items consisting of proximity sensors. In this invention, the reflection type proximity sensor detects an abnormal state on the upstream side of the continuous band that is being pulled up while being twisted from the rising position of the continuous band, and the continuous band detected by the third sensor is twisted. Since the light is pulled up while being pulled, the reflected light from the continuous band can be reliably received by the light receiving element. By using an infrared photoelectric tube as the reflection type proximity sensor, it is possible to prevent malfunction due to an interior light.

The invention according to claim 6 is, in addition to the structure of claim 1, a belt conveyor device in which the matter that the conveyor belt is a net conveyor is limited. In the present invention, since the net conveyor is used as the conveyor belt, when the continuous zone which is the transported object contains water or the like, or when the transported object needs to be cooled on the net conveyor, the net is used. The suction box can be provided on the back surface of the conveyor to effectively operate the object to be conveyed by suction.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. INDUSTRIAL APPLICABILITY The present invention can be effectively applied, for example, as a conveyor belt that conveys a fiber tow, particularly a fiber tow crimped in the previous step, to the next step. In the present embodiment, a conveyor belt that conveys the fiber tow will be described as an example, but the present invention is not limited to the fiber tow, and for example, a continuous strip having flexibility as the object to be conveyed. It is applicable as long as it is, and naturally includes a technical range that can be easily applied by those skilled in the art.

FIG. 1 shows the overall schematic diagram of the embodiment of the present application. That is, the fiber tow 1 crimped in the previous step 3 is discharged onto the conveyor belt 2 via the slider 8,
It is conveyed to the downstream side by the conveyor belt 2. On the downstream side of the conveyor belt 2, the fiber tow 1 is pulled upward against the weight of the fiber tow 1. This pulling is performed by pulling from the next step. When pulling up, the fiber tow 1 can be pulled up while twisting. The belt conveyor device is arranged between the previous step 3 and the next step 4.

The conveyor belt 2 is driven by a drive pulley 9 arranged on the downstream side and a driven pulley 10 arranged on the upstream side. Between the driven pulley 10 and the drive pulley 9, a support roller 11 that supports the belt may be arranged. Further, when a net conveyor is used as the conveyor belt 2, a suction box can be arranged on the back side of the net to be used as a suction belt. Further, by arranging a tray or the like under the net conveyor, it is possible to collect the water and the like falling from the continuous zone containing the water and discharge the water and the like to the outside.

FIG. 2 shows a state in which the fiber tow 1 is raised from the conveyor belt 2 at the reference raising position and is carried into the next step 4. In this state, a constant relationship is maintained between the discharge speed from the previous process 3 and the take-up speed to the next work process 4, and the starting position of the fiber tow 1 is within the standard range. There is. In this state, three linear sensors A, B, C as the second sensors 6 arranged along both sides of the conveyor belt 2 are provided.
Have been detected by. Each of the linear sensors A, B, and C is composed of a linear photoelectric tube having a predetermined width. The linear sensors A, B, C are arranged at three locations along the conveying direction of the conveyor belt 2. 3 above
The linear sensor B arranged in the middle of the position defines the reference position range as the starting position of the fiber tow 1. When the linear sensor A on the upstream side detects the rising of the fiber tow 1, that is, when the rising position of the fiber tow 1 in FIG. 2 is detected to move to the left, the take-up speed in the next step is slowed down. By doing so, the start-up position of the fiber tow 1 can be controlled to be returned to a position where the start-up of the fiber tow 1 can be detected by the linear sensor B.

Further, when the downstream linear sensor C detects the rising of the fiber tow 1, that is, when the rising position of the fiber tow 1 in FIG. By increasing the take-up speed, the linear sensor B can be controlled so that the rise of the fiber tow can always be detected.

As the second sensor 6, a single linear sensor may be used instead of the plurality of linear sensors, or a normal photoelectric tube may be arranged along the conveying direction of a plurality of conveyor belts, like the linear sensor. A control to increase the take-up speed in the next process when the phototube arranged on the downstream side detects the start-up of fiber tow, and to slow the take-up speed in the next process when the phototube on the upstream side detects the start-up of fibers. You can also do

FIG. 3 shows the first sensor 7 arranged on the downstream end side of the conveyor belt 2. In the first sensor 7, when the fiber tow 1 is pressed against the rotating plate 12 that rotates in the conveying direction of the conveyor belt 2, the rotating plate 12 rotates, and this rotation is detected by a limit switch or the like. Thus, it is detected that the fiber tow 1 has reached the downstream abnormal position. In the first sensor 7, the fiber tow 1 is conveyed from the upstream side to the downstream side while being pressed down from the upstream side due to the reduction or stop of the take-up speed for the next work stroke for some reason, and the rotating plate 12 is conveyed to the downstream side. The abnormal state can be detected by detecting the counterclockwise rotation as shown in FIG.

If the work is continued in this abnormal state, the fiber tow 1 cannot be carried into the next step 4 under the desired conditions, and if the first sensor 7 detects the abnormal state, the fiber tow from the previous step 3 is removed. Avoiding abnormal situations such as controlling to stop discharging and carrying in to the next process 4, controlling to stop the work process in the vicinity of the conveyor belt 2, or control to stop all the work in some cases, At the same time, an alarm for an abnormal condition will be issued.

As the first sensor, a reflection type photoelectric sensor, a proximity switch such as an ultrasonic sensor, or a photoelectric tube for detecting that the fiber tow has gone between the photoelectric tubes is used. It is possible to detect that an abnormal state position has been reached on the downstream side of. In addition, for example,
A sensor for detecting the height of the fiber tow from the conveyor belt on the downstream side of the conveyor belt is used to detect an increase in the height of the fiber tow 1, or a piezoelectric sensor for detecting the pressing pressure of the fiber tow. Can be used instead of the rotating plate 12, and can be detected by the pressure detected by the piezoelectric sensor. Other than this, a sensor that can detect that the fiber tow has reached the downstream end of the conveyor belt can be used as the first sensor. When the fiber tow 1 is pulled up while being twisted when the fiber tow 1 is pulled up, there is an advantage that reflected light can be easily received particularly when a reflection type sensor is used.

In FIG. 4, the take-up speed in the next step 4 is increased,
The 3rd sensor 5 which detects that the starting position of the fiber tow 1 has come to the abnormal position on the upstream side set as an abnormal state is shown. When this state is detected by the third sensor 5, the starting position of the fiber tow 1 is not moved to the upstream side any more, so that the pulling-up in the next step 4 is stopped or the pulling-down speed to the next working stroke is reduced. At the same time, the alarm for the abnormal condition is issued.

As the third sensor 5, it is possible to use a reflection type photoelectric sensor, an ultrasonic sensor, a photoelectric tube for detecting a fiber tow between the photoelectric tubes, or the like. In addition, it is possible to use a sensor that detects the height of the fiber tow from the conveyor belt, and the height detection sensor cannot detect the height of the fiber tow 1 that was detected during normal conveyance, Alternatively, by detecting a decrease in the detection height, it is possible to detect that the starting position of the fiber tow 1 has moved to a position exceeding the upstream abnormal position. Other than this, a sensor that can detect that the fiber tow has reached an abnormal position provided on the upstream side of the conveyor belt can be used as the third sensor.

When the fiber tow 1 is pulled up while being twisted when the fiber tow 1 is pulled up, there is an advantage that reflected light can be easily received particularly when a reflection type sensor is used. In addition, although the fiber tow has been described in the description of the embodiments, the continuous belt used in the present invention is not limited to the fiber tow, and a belt conveyor device is used for a continuous belt having flexibility. be able to. Further, when pulling up the continuous belt, it is possible to pull it up while twisting the continuous belt.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the overall configuration of the present invention.

FIG. 2 is a diagram showing a state in which a continuous belt is carried into a next process at a reference rising position.

FIG. 3 is a view showing an abnormal state in which a continuous band is pressed down on the downstream side of a conveyor belt.

FIG. 4 is a view showing a state in which a continuous band is raised at an abnormal position on the upstream side of a conveyor belt.

[Explanation of symbols]

1 continuous belt 2 conveyor belt 3 previous process 4th process 5 3rd sensor 6 second sensor 7 First sensor 8 slider 9 Drive pulley 10 Driven pulley 11 Support roller 12 Rotating plate 13 Belt conveyor equipment A, B, C linear sensor

Claims (6)

[Claims] 1. A flexible continuous belt, which is disposed between a previous step and a next step and discharged from the previous step, is received on a conveyor belt, and from the downstream side of the conveyor belt, the continuous belt has its own weight. In a belt conveyor device that conveys to the next process while pulling up against the above, detecting that the take-up speed of the next process is abnormally slower than the conveying speed of the conveyor belt by detecting the behavior of the continuous belt. 1 sensor, a 3rd sensor for detecting that the take-up speed in the next step is abnormally faster than the conveying speed of the conveyor belt by detecting the behavior of the continuous band, and a predetermined sensor between the 1st sensor and the 3rd sensor And a second sensor arranged in a region for controlling the take-up speed in the next step by detecting a change in the rising position of the continuous belt. Place 2. The belt conveyor device according to claim 1, wherein the first sensor is a sensor that detects a pressing force from the continuous band. 3. The belt conveyor device according to claim 1, wherein the second sensor is a linear sensor. 4. The belt conveyor device according to claim 1, wherein the third sensor is a proximity sensor. 5. The reflection type proximity sensor for detecting the continuous body, wherein the continuous band is pulled up while being twisted from the rising position, and the third sensor is pulled up while being twisted. 4. The belt conveyor device according to 4. 6. The belt conveyor device according to claim 1, wherein the conveyor belt is a net conveyor.