JPS6010973B2 - Conveyor belt damage detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a conveyor belt damage detection device for detecting damage to a belt caused by foreign matter or the like in a belt conveyor.

If a foreign object such as a piece of wood, a piece of stone, or a piece of metal gets mixed into the belt of a belt conveyor, the foreign object may penetrate the belt and cause damage to the belt.

In particular, when a foreign object gets caught in the carrier roller or chute, it acts like a fixed knife, and as the belt moves, it lacerates the belt by tens to tens of blood at once, making it impossible to do so, and causing enormous damage. give. For this reason, various automatic stop devices have been proposed, but most of them are not satisfactory in terms of effectiveness.

For example, there is a method in which an external detection coil and a coil for electromagnetic sensing are embedded in the width direction of the conveyor belt, and tears in the conveyor belt are detected by disconnection of the embedded coil. This has the disadvantage that the coil in the belt that repeats this cycle will suffer from bending fatigue and break, causing the belt to stop traveling unexpectedly. Moreover, it takes time and effort to check the position of a broken coil and repair it, and it is not very effective considering the equipment cost.
The purpose of this system is to detect damage to the belt by detecting the protrusions that are formed on the back of the belt due to foreign objects penetrating the belt or bending of the belt due to belt tears. This system supports a carrier roller that contacts the back side of the belt of a belt conveyor so that it can elastically move up and down in response to changes in the load on the belt, and an actuating plate that extends in the width direction of the belt with its tip attached to the belt diamond surface. The operating plate is connected to the carrying roller side so as to move up and down together with the carrying roller, and a detection system switch is connected to the shaft. The detection system is characterized in that a protrusion formed on the back surface rotates the actuating plate to turn on the detection system via the shaft.

EMBODIMENT OF THE INVENTION Hereinafter, the present invention will be explained in detail based on an embodiment shown in FIGS. 1 to 3 of the drawings.

In this embodiment, the present invention is applied to a belt conveyor in which three carrier rollers are arranged in a trough shape in the width direction of the belt. Contacting the back side of belt 1, belt 1
The carrier roller 2 supporting the load on the belt 1 is supported by the conveyor frame 4 via an elastic support mechanism 3 so as to be able to move up and down according to the load on the belt 1.

The carrier roller 2 is rotatably supported by a roller support frame 6 provided at the tip of a roller support shaft 5. Elastic support mechanism 3
consists of a cylindrical body 7 fixed to the conveyor frame 4, and a spring 8 that elastically supports the roller support shaft 5 inserted into the cylindrical body 7. One end of a support arm 9 is fixed to the roller support frame 6 of the carrier roller 2, and a bearing 10 is attached to the other end of the support arm 9. This bearing 1
A shaft 11 made of elastic material such as river piano wire or spring steel is supported so as to be able to be rolled around. A shaft 11 extending in the width direction of the belt 1 has base end portions of a large number of rectangular actuating plates 12 fixed thereto. The tips of all the actuating plates 12 lined up in the width direction of the belt 1 are designed to be located a minute distance A away from the back surface of the belt 1. Fine 4. Distance A is usually about 5 sails to 1 ship. Since the actuating plate 12 is connected to the carrier roller 2 side via the shaft 11, the bearing 10, and the support arm 9, it moves up and down in accordance with the up and down movement of the carrier roller 2 as the load on the belt 1 changes. Note that a restoring spring 13 is applied to the actuating plate 12 in order to keep the actuating plate 12 substantially perpendicular to the back surface of the belt 1. A detection system switch 14 is connected to the shaft 11.

This switch 14 is turned on by rotation of the shaft 11. The detection system is used to notify damage to the belt 1, and one possible example of this is to stop the drive of the belt 1.
In other words, when the switch 14 is turned on, the belt conveyor drive motor is stopped. Further, an alarm may also be set to sound in order to notify of damage to the belt 1. In the Yokosei conveyor belt damage device mentioned above, the belt 1 is damaged due to foreign matter, etc., and a protrusion 1 appears on the belt 1* surface.
5 occurs, the protrusion 15 touches the actuating plate 1, as shown in FIG.
2 is pushed down, thereby actuating the switch 14 connected to the shaft 11, and the belt 1 is stopped.

Note that during normal operation, even if there is a load change on the belt 1, the actuating plate 12 moves up and down together with the carrier roller 2 to maintain the minute distance A, so that malfunctions will not occur. that's all,
As specifically explained with reference to one embodiment, according to the conveyor belt damage detection device according to the present invention, belt damage can be detected accurately and early, and damage can be minimized. .

Further, even if there is a variation in the load applied to the belt 1, the variation is followed, so there is no possibility of malfunction. Ta

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of an embodiment of the present invention, FIG. 2 is a side view of the embodiment, and FIG. 3 is an explanatory view showing the operating situation. In the drawings, 1 is a belt, 2 is a carrier roller, 30 is an elastic support mechanism, 6 is a roller support frame, 9 is a support arm, 10 is a bearing, 11 is a shaft, 12 is an operating plate, and 14 is a switch. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A carrier roller in contact with the back side of the belt of a belt conveyor is supported so that it can move elastically up and down in response to fluctuations in the load applied to the belt, and an actuating plate extending in the width direction of the belt is moved with its tip close to the back side of the belt to move the shaft. At the same time, the actuating plate is connected to the carrier roller side so as to move up and down together with the carrier roller, and a detection system switch is also connected to the shaft to detect the protrusion that occurs on the back side of the belt when the belt is damaged. A conveyor belt damage detection device characterized in that a switch of the detection system is turned on via the shaft by rotating the actuation plate.