JP2021038058A - Belt-slip detecting mechanism for belt conveyor, and belt conveyor operation control device - Google Patents

Abstract

To provide a belt-slip detecting mechanism which is capable of detecting belt-slip of a belt conveyor with a simple structure, and is excellent in safety.SOLUTION: A belt-slip detecting mechanism for belt conveyor 1 comprises a rotation detecting disk 11 and a detector 13 for detecting a state of rotation of the rotation detecting disk 11. The rotation detecting disk 11 is a resin molding having a thickness of 5 mm or more. An object-to-be-detected 12 is placed at one position of an annular outer peripheral surface of the rotation detecting disk 11. The rotation detecting disk 11 is joined to a disk-installing shaft 14 which is an extended portion of a shaft of a non-driving drum 41 so as to be rotated around the rotation shaft of the non-driving drum 41 in conjunction with the non-driving drum 41. The detector 13 is disposed at a position which faces the annular outer peripheral surface of the rotation detecting disk 11 in a non-contact manner.SELECTED DRAWING: Figure 3

Description

The present invention relates to a belt slip detection mechanism for a belt conveyor and a belt conveyor operation control device configured by using the mechanism.

In the process of smelting non-ferrous metals such as copper, lead, and zinc, these raw materials are generally transported while connecting a plurality of belt conveyors in series. In this case, if one belt conveyor stops transporting due to belt slip due to overload due to a large amount of transported material, biting of raw materials or foreign matter between the drive drum and the belt, etc., the belt conveyor Raw materials supplied from the belt conveyor on the upstream side may accumulate at the transit portion and further scatter to the surroundings. Further, if the slipped belt conveyor is left for a long time, it may cause damage or breakage of the belt.

As a means for quickly detecting such a belt slip of a belt conveyor, for example, an object to be detected that rotates in conjunction with the rotation of a rotating drum on the driven side of the belt conveyor and a proximity switch that detects the object to be detected are used. A belt slip detection device capable of detecting a belt slip with a simple structure has already been developed by including the belt slip detection device (see Patent Document 1).

Similarly, as a means for accurately detecting the belt slip of the belt conveyor, a rotation speed detection device is installed on both the rotating drum on the driving side and the rotating drum on the driven side, and the difference in peripheral speed between the rotating drums is calculated. By doing so, a method for detecting belt slip more reliably has also been proposed (see Patent Document 2).

However, in the belt slip detection device 1B described in Patent Document 1, as shown in FIGS. 4 and 5, the semicircular arc-shaped metal object to be detected 12B joined to the rotation detection disk 11B is on the driven side. Since it is configured to rotate in a state of being greatly projected to the side of the rotating drum, there has been a problem of risk of contact accidents due to the rotation of the metal protrusion at high speed. In Patent Document 2, only the detection target and the processing method of the detected data are disclosed, and no specific shape or the like of the mechanism for detecting the state of rotation is mentioned.

Japanese Unexamined Patent Publication No. 9-301520 Japanese Unexamined Patent Publication No. 2013-220882

The present invention has been made in view of the above problems. For example, the belt slip of a belt conveyor can be detected with a simple structure similar to that of the apparatus described in Patent Document 1, and the safety is also improved. It is an object of the present invention to provide an excellent belt slip detection mechanism.

The present inventors have come up with the idea that the above problems can be solved by using a rotating body for detecting the rotational state of the non-driven drum as a rotation detecting disk in which the object to be detected is provided on a resin disk. However, the present invention has been completed. Specifically, the present invention provides the following.

(1) A belt slip detection mechanism for a belt conveyor including an endless belt and a non-driving drum, which detects a rotation detection disk and a rotation state of the rotation detection disk. The rotation detection disk is a resin molded product having a thickness of 5 mm or more, and the object to be detected is provided at one position on the annular outer peripheral surface, and the rotation is the same as that of the non-driven drum. It is joined to a disk installation shaft which is an extended portion of the shaft of the non-drive drum so as to rotate around the shaft in conjunction with the non-drive drum, and the detector is the annular outer peripheral surface of the rotation detection disk. A belt slip detection mechanism for belt conveyors that is installed in a non-contact position facing the belt.

(2) The belt according to (1), wherein the object to be detected is a metal pin, and the metal pin is embedded so that the head does not protrude from the surface of the annular outer peripheral surface of the rotation detection disk. Belt slip detection mechanism for conveyors.

(3) The belt slip detection mechanism for a belt conveyor according to (1) or (2), wherein the disk installation shaft is made of resin.

(4) The belt conveyor according to any one of (1) to (3), wherein a part of the disk installation shaft in the longitudinal direction is a notch having a smaller shaft diameter than the other regions. Belt slip detection mechanism.

(5) A belt including the belt slip detection mechanism for the belt conveyor according to any one of (1) to (4) and a control unit that processes the signal of the detector to control the operation of the belt conveyor. Conveyor operation control device.

According to the present invention, it is possible to provide a belt slip detection mechanism capable of detecting a belt slip of a belt conveyor with a simple structure and having excellent safety.

It is a top view which shows the outline of the whole structure of the belt conveyor provided with the belt slip detection mechanism for the belt conveyor of this invention. It is a front view (the view from the side surface side of the belt conveyor) of the belt slip detection mechanism for the belt conveyor of this invention. It is a top view (the view from the top surface side of the belt conveyor) of the belt slip detection mechanism for the belt conveyor of this invention. It is a front view (the view from the side surface side of the belt conveyor) of the belt slip detection mechanism for a conventional belt conveyor. It is a top view (the view from the top surface side of the belt conveyor) of the belt slip detection mechanism for a conventional belt conveyor.

Hereinafter, preferred embodiments of the belt slip detection mechanism for the belt conveyor of the present invention and the belt conveyor operation control device will be described. However, the present invention is not limited to the following embodiments.

<Overall structure of belt conveyor>
FIG. 1 shows an outline of the overall structure of a belt conveyor 2 provided with the belt slip detection mechanism 1 of the present invention. The belt 3, which is a belt-shaped endless belt, is wound around the outer circumferences of the two rotating drums 41 and 42. These rotating drums 41 and 42 are rotatably attached to the gantry 7 by shafts 51 and 52 and bearings 61 and 62 at both ends, respectively. In the present specification, the rotating drum 42 rotated by the motor is referred to as a "driving drum", and the rotating drum 41 rotated by the running of the belt is referred to as a "non-driving drum" or a "driven drum". However, in FIG. 1, the rotating drum 41 corresponds to the "non-driving drum" or the "driven drum", but the rotating drum is not limited to the rotating drum located at the start point end of the transport, and the rotating drum rotated by the running of the belt is Corresponds to "non-driving drum".

The rotation of the motor 81 and the speed reducer 82 attached to the gantry 7 is a chain wheel 84 attached to the output shaft of the speed reducer 82 and the shaft 52 of the rotary drum 42 on the drive side, and an endless drive wound around them. It is transmitted to the rotating drum 42 on the drive side by the chain 83. Then, the rotary drum 41 on the driven side is driven by the belt 3 driven by the rotary drum 42 on the drive side.

Here, when slip occurs between the belt 3 and the rotary drum 42 on the drive side or the rotary drum 41 on the driven side, the rotary drum 41 on the driven side causes an unstable speed drop, and a complete slip occurs. Sometimes it stops. Therefore, the belt slip detection mechanism 1 of the present invention is indispensable to be incorporated in at least one of the plurality of rotating drums other than the driving drum, and is incorporated in the driven rotating drum 41. Is preferable. Thereby, slip between the belt 3 and the rotating drum 42 on the driving side or the rotating drum 41 on the driven side can be detected.

<Belt slip detection mechanism>
In the belt slip detection mechanism 1, the object to be detected 12 is embedded, and the rotation detection disk 11 that rotates in conjunction with the rotation of the non-driven drum, the object to be detected 12 embedded in the rotation detection disk 11, and the object to be detected. The detector 13 that detects the rotation state of the rotation detection disk 11 by detecting the detector 12 is configured as a minimum component.

The rotation detection disk 11 is a tire-shaped resin molded product having a thickness of 5 mm or more as shown in FIGS. 2 and 3. Further, the rotation detection disk 11 is provided with a detected body 12 at one position on the annular outer peripheral surface thereof.

As an example of a preferable resin material for forming the rotation detection disk 11, vinyl chloride, which is inexpensive and easily available, can be mentioned. By forming the rotation detection disk 11 with such a member, the economic efficiency of the belt slip detection mechanism 1 including the replacement cost of the member can be improved.

The size of the rotation detection disk 11 may be designed according to the situation of the space of the installation place, and is not particularly limited. For example, a commercially available vinyl chloride closure having a thickness of 5 mm or more and 15 mm or less is used. The plate can be preferably used as the rotation detection disk 11.

The detected body 12 is, for example, a metal pin, and is embedded at a predetermined position on the annular band-shaped outer peripheral surface (annular outer peripheral surface) of the rotation detection disk 11. The shape of the metal pin is not particularly limited as long as it can be stably fixed in such a manner that the head is exposed on the annular outer peripheral surface of the rotation detection disk 11 which is a resin molded product, but the rotation detection which is a resin molded product is not particularly limited. Various metal screws that can be easily embedded and fixed by being screwed into the disk 11 can be preferably used. Further, as shown in FIGS. 2 and 3, for example, it is preferable that a plurality of the objects to be detected 12 are embedded on one straight line orthogonal to the rotation traveling direction of the annular outer peripheral surface.

When the object to be detected 12 is a metal pin, the metal pin has a mode in which the head does not protrude from the surface of the annular outer peripheral surface of the rotation detection disk 11, that is, the head surface of the metal pin and the rotation detection disk. It is preferable that the surface of the annular outer peripheral surface of No. 11 is embedded so as to be flush with the surface. Therefore, a commercially available dish-shaped wooden screw can be preferably used as the object to be detected 12.

Then, as described above, the rotation detection disk 11 in which the metal object 12 to be detected is embedded in the above embodiment includes at least one rotation drum other than the drive drum, preferably the driven side rotation drum 41. , It is joined so as to rotate around the same rotation axis in conjunction with the drum.

As shown in FIG. 3, the rotation detection disk 11 is preferably joined to the disk installation shaft 14 which is an extended portion of the shaft of the driven side rotating drum 41 or the like.

It is more preferable that the disk installation shaft 14 is made of resin, and that a part of the longitudinal direction thereof is an annular notch having a smaller shaft diameter than the other regions. With such a structure, in the event that the rotation detection disk 11 comes into contact with a person or an object in the vicinity during rotation, the disk installation shaft 14 is used to avoid damage to the contacted object. It can be made to break at the notch. As a result, for example, when a worker's limbs hit the rotation detection disk 11, the disk installation shaft 14 breaks and the rotation detection disk 11 comes off the rotation shaft, resulting in serious injuries such as cuts and fractures. Can be prevented.

The detector 13 is, for example, an electromagnetic coil type proximity sensor. Then, for example, the detector 13 is attached to the bracket 15 attached to the gantry 7 at a position facing the detected body 12, so that the detector 13 is not on the surface in the vicinity of the annular outer peripheral surface of the rotation detection disk 11. It is installed in a position where it faces each other by contact. Further, the detector 13 may be, for example, an optical sensor having a light emitting body such as a laser and a light receiving part, or an optical sensor having only a light receiving part, and the detected body, a so-called marker, may be a reflector.

<Belt conveyor operation control device>
Belt conveyor operation control by connecting the detector 13 of the belt slip detection mechanism 1 to a control unit that processes the signal of the detector and controls the operation of the belt conveyor via a wired or wireless information transmission path. The device can be configured. The configuration of the control unit can be various conventionally known configurations. For example, in the device for controlling the operation of the belt conveyor described in each of the above prior art documents, only the part of the mechanism for detecting the rotational state of the rotating drum can be replaced with the belt slip detection mechanism 1 of the present invention. ..

In the belt conveyor operation control device having the above configuration, when the non-detection time of the object to be detected by the detector 13 exceeds the set threshold value beyond the time for the rotation detection disk 11 to go around, or by the detector 13. When the detection time of the detected object exceeds a set threshold value, it is possible to determine that belt slip has occurred and issue an alarm to stop the motor 81. Further, by applying the present invention to the invention described in Patent Document 2, a rotation detection disk 11 and a detector 13 are provided on the drive drum side in addition to the non-drive drum side, so that the non-drive drum is provided. And the peripheral speed of the drive drum may be compared.

Further, as an example of the operation of the belt conveyor operation control device according to the present invention, after the belt slip detection mechanism 1 detects the slip of the driven side rotating drum 41, the motor 8 of the belt conveyor is stopped and the motor 8 of the belt conveyor is stopped and upstream of the motor 8. A control mode for urgently stopping all the belt conveyors and operating devices can be mentioned.

The belt slip detection mechanism 1 for a belt conveyor of the present invention and the belt conveyor operation control device configured by using the mechanism described above have the following effects.

According to the invention of (1), that is, the belt slip detection mechanism for the belt conveyor of the present invention, the rotating body member for detecting the rotating state of the non-driving drum has a thickness of 5 mm or more without a protrusion. A rotation detection disk having a resin molded product as a substrate and an object to be detected on the annular outer peripheral surface thereof was used. As a result, it is possible to improve the safety during operation as compared with the conventional device while maintaining the effect of detecting the belt slip of the belt conveyor with a simple structure.

In the invention of (2), the object to be detected in the invention of (1) is composed of a metal pin. As a result, the rotation detection disk can be easily manufactured by driving or screwing a metal pin into a resin substrate. Further, in this structure, by embedding a metal pin so that the head does not protrude from the surface of the resin substrate, the protrusion of the rotation detection disk is completely eliminated, and the belt for a highly safe belt conveyor. A slip detection mechanism can be formed and placed in the minimum space.

In the invention of (3), the shaft is easily broken when an impact force of a certain level or more is applied to the rotation detection disk. As a result, it is possible to reduce the risk of accidental contact between the rotation detection disk and surrounding workers, other members, and the like.

In the invention of (4), the shaft is broken at a specific position when an impact force of a certain level or more is applied to the rotation detection disk or the like. As a result, it is possible to significantly reduce the risk of accidental contact between the rotation detection disk and surrounding workers, other members, and the like.

According to the invention of (5), that is, the belt conveyor operation control device configured by using the belt slip detection mechanism 1, the slip state of the belt during raw material transportation is reliably detected at an early stage, and the belt in which slip occurs. The conveyor and the belt conveyor on the upstream side of the conveyor can be stopped immediately, and countermeasures against abnormalities and recovery measures can be taken immediately. As a result, it is possible to prevent damage to the belt due to slippage, troubles such as scattering of raw materials, and stoppage of operation due to them.

1 Belt slip detection mechanism 2 Belt conveyor 3 Belt 41 Rotating drum (non-driving drum)
42 rotary drum (drive drum)
51, 52 Shafts 61, 62 Bearings 7 Mounts 81 Motors 82 Reducers 83 Drive chains 84 Chain wheels 11 Rotation detection discs 12 Detected objects 13 Detectors 14 Disc installation shafts 15 Brackets 1B Belt slip detection mechanism (conventional type)
11B Rotation detection disk (conventional type)
12B Detected object (conventional type)
14B disk installation shaft (conventional type)

Claims (5)

A belt slip detection mechanism for a belt conveyor including an endless belt and a non-driving drum.
Rotation detection disk and
A detector for detecting the rotation state of the rotation detection disk is provided.
The rotation detection disk is a resin molded product having a thickness of 5 mm or more, and the object to be detected is provided at one position on the annular outer peripheral surface, and the non-drive is centered on the same rotation axis as the non-drive drum. It is joined to the disk installation shaft, which is an extended part of the shaft of the non-driving drum so that it rotates in conjunction with the drum.
The detector is installed at a position facing the annular outer peripheral surface of the rotation detection disk in a non-contact manner.
Belt slip detection mechanism for belt conveyors. The belt conveyor according to claim 1, wherein the detected body is a metal pin, and the metal pin is embedded so that the head does not protrude from the surface of the annular outer peripheral surface of the rotation detection disk. Belt slip detection mechanism. The belt slip detection mechanism for a belt conveyor according to claim 1 or 2, wherein the disk installation shaft is made of resin. The belt slip detection mechanism for a belt conveyor according to any one of claims 1 to 3, wherein a part of the disk installation shaft in the longitudinal direction is a notch having a smaller shaft diameter than the other regions. The belt slip detection mechanism for a belt conveyor according to any one of claims 1 to 4.
A control unit that processes the signal of the detector to control the operation of the belt conveyor is provided.
Belt conveyor operation control device.

Images