JP2000095314A - Belt conveyer, and core body inspection device and method for conveying belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and certainly find any damage place of a buried core body, by providing a pressing body for pressing one surface of a conveying belt and providing the pressing body with a load detecting body for detecting a repulsive load from the conveying belt. SOLUTION: Pressing bodies 8 are mounted so that a pressing force to a conveying belt 2 is adjustable. The pressing body 8 is provided with a load cell 10 as a load detecting body. The load cell 10 is placed between a bracket and a leg portion, and, for example, a plurality of (two) load cells 10 are provided for one pressing body 8. Only one load cell 10 is also allowed for one pressing body 8. The load cells 10 are connected with an amplifier 18 for the load cells, and the amplifier 18 for the load cells is connected with a pen recorder 19. Repulsive load added to the pressing body 8 from the pressed conveying belt 2 is amplified by the amplifier 18 for the load cells through the load cells 10, and is displayed on the pen recorder 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor, a device for inspecting a core of a conveyor belt, and a method of inspecting a core of a conveyor belt, which can easily and surely detect and detect damage to a core embedded in a conveyor belt. It is about.

[0002]

2. Description of the Related Art In general, an endless conveyor belt is supported by a plurality of rotatable support rollers, rotates and travels, and can convey an object.

Such a conveyor belt has a structure in which a plurality of steel cords are embedded as a core in a rubber layer in the running direction of the belt, or a structure in which a sheet-like reinforcing cloth is embedded as a core in the rubber layer. As described above, a structure in which a core is embedded in a rubber layer is used.

When the embedded core is damaged, the transport belt cannot sufficiently support the tension acting on the transport belt. Therefore, the transport belt is run in a damaged state. May cause the transport belt to cut.

[0005] In order to prevent such an inadvertent cutting of the belt, a meandering running of the conveyor belt has been conventionally performed in which a portion of the rubber layer, such as cracks, swelling, and peeling, is detected to estimate a damaged portion of the core. Inspection of the conveyor belt by a method such as estimating the damaged part of the core body by detecting the part, estimating the damaged part of the core body by detecting the abnormal extension of the conveyor belt, etc. Early detection has been performed.

[0006]

However, in these inspection methods, the appearance of the conveyor belt is visually judged by an inspector. For example, when the conveyor belt is relatively long, the inspection is performed. Not only is the work complicated, but there is a possibility that the damaged portion may be overlooked because it is not visible over the entire length of the belt. In addition, it is greatly affected by the difference in ability of the inspector, and not everyone can surely find the damaged portion of the belt.

In this regard, a method of inspecting the core by irradiating the conveyor belt with X-rays is known. However, such a method cannot be used when the core is a reinforcing cloth, and is generally used. It is not a method.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a belt conveyor that can easily inspect a core of a conveyor belt and reliably find a damaged portion, regardless of the type of the core.
An object of the present invention is to provide an apparatus for inspecting a core of a conveyor belt and a method for inspecting a conveyor belt for damage.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the first means is a belt conveyor, on which a conveyor belt 2 having a core 6 embedded therein can run. In a simple belt conveyor, a pressing body 8 for pressing one surface of the conveyor belt 2 is provided, and the pressing body 8 is provided with a load detector 10 for detecting a repulsive load from the conveyor belt 2. It is in.

The above-mentioned belt conveyor is provided with a pressing member 8 for pressing one surface of the conveyor belt 2, so that a repulsive force from the conveyor belt 2 is applied to the pressing member 8; Since the load detector 10 for detecting the repulsive load from the conveyor belt 2 is provided, the load detector 10 can detect the repulsive force received by the pressing body 8 as the repulsive load.

When the conveyor belt 2 is run with one surface of the conveyor belt 2 pressed by the pressing member 8, a repulsive load applied to the pressing member 8 from the conveyor belt 2 is continuously detected. can do.

That is, as described in claim 3, the transport belt 2 is caused to travel while the one surface of the transport belt 2 in which the core body 6 is embedded is pressed by the pressing body 8, and the transport applied to the pressing body 8 is performed. If the repulsion load from the belt 2 is continuously detected,
When there is no abnormality such as damage in the core 6 of the conveyor belt 2, the detected repulsion load shows a substantially constant value. Is weaker than the portion where the repulsion force in the traveling direction of the conveyor belt 2 is normal, and therefore, the value of the detected repulsion load decreases.

As described above, according to the core inspection method in which the conveyor belt 2 is run, the repulsion load is continuously detected, and the change in the repulsion load is measured, the damaged portion of the core 6 of the conveyor belt 2 can be easily detected. And it can be surely found.

According to a second aspect of the present invention, there is provided a core body inspection device which can be mounted on a belt conveyor 1 on which a conveyor belt 2 having a core body 6 embedded therein can run, wherein one surface of the conveyor belt 2 is pressed. And a load detector 10 capable of detecting a repulsive load from the conveyor belt 2 applied to the pressing member 8.
According to the core inspection apparatus having the above, not only a new belt conveyor but also an existing belt conveyor can be equipped, and damage to the core 6 of the transport belt 2 can be easily and reliably found.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a reference view schematically showing a belt conveyor and a core body inspection apparatus according to the present invention, and FIG. 2 is a cross-sectional view showing a state cut along a line AA in FIG. It shows the configuration more specifically.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a belt conveyor capable of rotating and running with an endless transport belt 2 supported by a support roller 3. In the conveyor belt 2, a core body 6 such as a steel cord or a reinforcing cloth is provided in a rubber layer 5 in a running direction Y.
It consists of a structure buried in.

The support roller 3 comprises a roller portion 3b rotatably mounted on a bracket 3a fixed to a base 7 of the belt conveyor 1, and is in contact with a lower surface 2b (another surface 2b) of the conveyor belt 2. I have.

The support roller 3 moves in the width direction X of the transport belt 2.
Are arranged in a row in the running direction Y of the transport belt 2. Among the plurality of support rollers 3 arranged side by side in the width direction X, the outer support roller 3 has its rotation center axis M set so that the cross section of the transport belt 2 in the width direction X becomes a trough type. It is provided to be inclined inward.

Further, the upper surface 2a (one surface 2a)
1A is provided with a core body inspection device 11 having a pressing body 8 for pressing the conveying belt 2 and a load detecting body 10 for detecting a repulsive load from the conveying belt 2 applied to the pressing body 8.

More specifically, the pressing body 8 is
The roller 14 of the pressing body 8 is adapted to stretch the upper surface 2a of the conveyor belt 2 between the support rollers 3, 3 arranged in the running direction Y. The belt 2 is provided so as to be pressed to the extent that the belt 2 bends.

That is, a rotatable cylindrical roller 14 is provided on the upper surface 2a of the conveyor belt 2 (the other surface 2b is free to the one surface 2a) where the lower surface 2b does not have an abutment such as the support roller 3 or the like. The pressing member 8 is pressed, and the conveyance belt 2 is bent downward in a stretched state by the pressing of the pressing member 8.

More specifically, one pressing roller 8 is provided between the support rollers 3 in a row in the running direction Y, and is therefore arranged in parallel in the width direction X of the conveyor belt 2. Three pressing members 8 are arranged in parallel corresponding to one set (three) of supporting rollers 3.

The pressing members 8 arranged side by side include, for example,
The pressing body 8 located on the outer side is provided so that its rotation center axis N is inclined outside the rotation center axis M of the corresponding support roller 3. Thus, the rotation center axis N of the pressing body 8
Is made non-parallel to the rotation center axis M of the corresponding support roller 3, so that one surface 2 a of the conveyor belt 2 is partially strongly pressed (the rotation center axis N of the pressing body 8 located on the outside is When the belt is tilted outward from the rotation center axis M, the ears of the conveyor belt 2 are strongly pressed.) Therefore, the repulsive load of the strongly pressed portion is further reduced by the load detector 10 described later. There is an advantage that it can be detected remarkably.

On the base 7 between the support rollers 3 in the running direction Y, a mounting member 16 is laid in the width direction X of the conveyor belt 2, and the mounting member 16 has a bracket 12 of the pressing body 8. The pressing body 8 is provided by attaching a leg portion 15 projecting upward from the above.

The pressing member 8 is mounted so as to adjust the pressing force on the conveyor belt 2 (for example, the pressing member 8
The mounting position can be adjusted by means such as mounting the leg 15 to the mounting member 16 using a nut or the like).

Further, the pressing body 8 is provided with a load cell 10 as a load detecting body. Load cell 10
Is disposed between the bracket 12 and the leg 15, and, for example, a plurality of (two) load cells 10 are provided for one pressing body 8. The load cell 10 may be singular for one pressing body 8. A load cell amplifier 18 is connected to the load cell 10, and a pen recorder 19 is connected to the amplifier 18 (note that the load cell amplifier 18 and the pen recorder 19 are provided for one pressing body 8, respectively). Although connected, all load cell amplifiers 18 and pen recorders 19 are not shown in FIG. 1).

With this configuration, the repulsive load applied to the pressing body 8 from the pressed conveyor belt 2 is amplified by the load cell amplifier 18 via the load cell 10 and displayed on the pen recorder 19. When a plurality of load cells 10 are provided on one pressing body 8 and one load cell amplifier 18 is provided for the plurality of load cells 10, an average value is displayed on the pen recorder 19. .

Next, the method for inspecting the core of the conveyor belt according to the present invention will be described. When the pressing member 8 presses the one surface 2a of the conveyor belt 2 as described above, the conveyor belt 2 applies a repulsive force to the pressing member 8, and the repulsive force causes the load cell 10 as a load detector to be distorted. Is displayed on the pen recorder 19 via the amplifier 18 as a repulsive load.

When the conveyor belt 2 of the belt conveyor 1 runs, the repulsive load applied to the pressing body 8 is continuously detected and displayed on the pen recorder 19.

If there is no abnormality such as damage on the core 6 of the conveyor belt 2, the conveyor belt 2 applies a substantially constant repulsive force to the pressing body 8, and accordingly, the repulsion detected by the load detecting body 10 of the pressing body 8. The load shows a substantially constant value over time (FIG. 3).
Shown in the graph). On the other hand, if there is an abnormal portion such as damage in the core 6 of the transport belt 2, the portion has a lower repulsion force in the traveling direction Y of the transport belt 2 than the normal portion, and therefore, the repulsion to the pressing body 8. The load decreases (point Z in FIG. 3).

As described above, by moving the conveyor belt 2 and continuously detecting the repulsion load and measuring the change in the repulsion load, the damaged portion of the core 6 of the conveyance belt 2 can be easily and reliably found. be able to.

That is, when a decrease in the repulsion load is detected a predetermined time after the detection start point of the repulsion load of the conveyor belt 2 (after a predetermined traveling distance of the conveyor belt 2), the core embedded in that portion is detected. 6 are presumed damaged.

However, the repulsion load may be reduced due to the meandering of the conveyor belt 2 or the abrasion of the rubber layer 5, but the present invention is also significant in that the damaged portion of the embedded core 6 can be narrowed down. In addition, meandering or the like of the conveyor belt 2 can be visually determined while the belt is running. Further, the wear or the like of the rubber layer 5 can be determined by measuring the rubber thickness of the narrowed down portion at the time of stopping.

Further, according to the present invention, even when the core 6 is a reinforcing cloth, a damaged portion can be detected, and the core 6 can be generally used regardless of the type of the core.

In the above embodiment, the trough type belt conveyor is exemplified. However, for example, a flat type belt conveyor or a conveying belt formed in a pipe shape to convey an object to be conveyed such as a granular material. The present invention can be applied to a so-called pipe conveyor or the like, and the type of the belt conveyor is not limited.

Accordingly, the rotation center axis M of the support roller 3 is not limited to the above-described embodiment, and the number of the support rollers 3 provided in the width direction X of the transport belt 2 is not limited to the above-described embodiment. The number of support rollers 3 is not limited to three as described above, and may be one, for example, as shown in FIG. 4A, or a plurality of support rollers 3 (not shown).

Further, in the above embodiment, the pressing member 8
Presses the upper surface 2a of the conveyor belt 2, but FIG.
As shown in (b), it may be provided so as to press the lower surface 2b of the transport belt 2. The pressing body 8 may be provided so as to press one side of the conveyor belt 2.

In the above embodiment, the pressing member 8
Are arranged in parallel (for example, three), but the pressing body 8 is not necessarily limited to plural (for example, three). For example, as shown in FIG. Alternatively, as shown in FIG. 5B, the number may be four or more.

However, since the width of the core 6 pressed by one pressing body 8 becomes narrower as the plurality of pressing bodies 8 are provided, there is an advantage that a damaged portion of the core 6 can be detected more accurately. .

Further, in the above embodiment, the pressing body 8
Consists of a cylindrical roller 14, for example, as shown in FIG.
As shown in (1), the pressing body 8 may be composed of a spherical roller, a crowned roller, or the like.

In the above-described embodiment, the configuration has been described in which a part of the pressing body 8 is provided such that its rotation center axis N is inclined with respect to the rotation center axis M of the corresponding support roller 3. For example, as shown in FIG. 5C, all the pressing members 8 may be provided so as to be parallel to the rotation center axis M of the support roller 3.

Furthermore, the transport belt 2 is not necessarily in the width direction X.
Does not have to be provided side by side,
For example, as shown in FIG. 6, a plurality of pressing bodies 8 may be provided before and after in the traveling direction Y. The pressing body 8 can be arbitrarily provided at a position where the core 6 is to be inspected.

In addition, the design of the belt conveyor, the core inspection apparatus and the method of inspecting the core of the conveyor belt shown in the above embodiment can be changed as appropriate within the scope of the present invention.

[0044]

As described above, according to the belt conveyor and the method for inspecting the core of the conveyor belt of the belt conveyor according to the present invention, there is no need for the inspector to visually inspect the conveyor belt as in the prior art. Damaged portions of the embedded core can be easily and reliably found. Therefore, regardless of the ability of the inspector, the ordinary worker can inspect the core body, and the inspection work can be reliably performed and the burden can be reduced.

Further, since a damaged portion of the core can be found regardless of the type of the core, it can be used for general purposes.

Further, according to the core inspection apparatus according to the present invention, the above-mentioned effects can be obtained by equipping a new or existing belt conveyor.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a belt conveyor and a core body inspection device according to the present invention.

FIG. 2 is a detailed cross-sectional view taken along line AA of FIG.

FIG. 3 is a reference schematic diagram showing a change in a repulsion load detected by a load detector.

FIGS. 4A and 4B are schematic perspective views showing another embodiment of the belt conveyor and the core body inspection apparatus according to the present invention.

5A, 5B, and 5C are detailed cross-sectional views showing another embodiment of the belt conveyor and the core body inspection device according to the present invention.

FIG. 6 is a schematic perspective view showing another embodiment of the belt conveyor and the core body inspection device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Belt conveyor, 2 ... Conveying belt, 6 ... Core body, 8 ...
Pressing body, 10 ... Load detecting body

Claims (3)

[Claims] A belt conveyor on which a conveyor belt (2) having a core (6) embedded therein can run, said conveyor belt (2)
A pressing body (8) for pressing one surface of the pressing body (8) is provided.
A belt conveyor provided with a load detector (10) for detecting a repulsive load from the conveyor belt (2). 2. A core body inspection device that can be mounted on a belt conveyor (1) on which a conveyor belt (2) embedded with a core body (6) can run, wherein one side of the conveyor belt (2) is pressed. A pressing body (8), and a load detecting body (10) capable of detecting a repulsive load from the conveying belt (2) applied to the pressing body (8). Inspection equipment. The transport belt (2) is run while a pressing body (8) presses one surface of a transport belt (2) in which a core (6) is embedded, and the pressing body (8) A method of inspecting a core of a conveyor belt of a belt conveyor, wherein a repulsive load from an applied conveyor belt (2) is continuously detected.