JPS58118945A - Bending test device of belt - Google Patents

Abstract

PURPOSE:To always keep a tensile angle of a belt constant, and also to take a stroke of a desired value, by driving the belt by a sliding piece which moves in parallel with the belt wound between a pair of pulleys. CONSTITUTION:To a testing belt 4 stretched between a pair of pulleys 3, 3' having an equal diameter, tension of a prescribed quantity is given by a weight 5 and a lever 7. A sliding piece 11 which is capable of moving in parallel with the belt 4 executes a reciprocating motion in parallel with the belt 4 between guides 12, 12' by a crank mechanism 1 and a lever 2, and the sliding piece 11 connected to the belt 4 by an arm 13 and a fixing tool 14 moves the belt back and forth along the pulleys 3, 3'. The performance test is executed by bending the testing belt 4 by the pulleys 3, 3', and in this case, a tensile angle of the belt can be kept constant at all times, and also a stroke of a desired value can be taken by adjusting the arm length of the crank mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bending test device for a belt such as a conveyor belt, and more particularly to a test device for testing the performance of a belt by bending the conveyor belt with a pulley.

First, an outline of a conventional test device will be explained with reference to FIG.

In FIG. 1, reference numeral 6 denotes a pulley, around which a test belt, in this example, a conveyor belt 4, is wound. and both ends 4' of the belt 4.

4" is connected to both ends of the swinging arm 2" by wires 6a + 6b. On the other hand, the pulley 6 is pivoted to the left end of a rod 7, and the rod 7 is supported by a fulcrum 8 so as to be able to swing freely at any point inside, and a weight 5 is attached to the right end for applying a predetermined tension to the belt 4. is installed. Further, in order to swing the swinging arm 2'' around its central pivot point 9, crank mechanism 1° interlocking levers 2, 2' are provided.

In operation, the crank mechanism 1 is driven to swing the swinging arm 2'' by moving the interlocking levers 2 and 2'. When the swinging arm 2'' swings, the belt 4 is moved along the pulley 3. This reciprocating motion causes the belt 4 to be repeatedly bent, and the durability of the test belt 4 is tested (note that the tension of the belt 4 at this time can be adjusted using a weight). As mentioned above, in the conventional device, since the belt is reciprocated by the swinging motion of the swinging arm, the tension angle of the belt changes (this means that 68'l 6b indicated by the chain line in FIG. 1), 2 and solid lines 6a, 6b,
2", it is easy to understand that the tension angle of the belt changes during the test), and the stroke cannot be made large (the larger the stroke, the larger the above-mentioned angle change, so the stroke has its own limitations).

The present invention aims to eliminate these drawbacks of conventional devices. According to the test device of the present invention, the tension angle of the belt can be kept constant at all times, and a stroke of a desired value can be obtained. This makes it possible to improve the performance of the test equipment.

Next, the present invention will be explained in detail with reference to FIG. Furthermore, the second
In the figure, the same reference numerals are given to the same members as in FIG. 1, and detailed explanation thereof will be omitted.

In FIG. 2, a test belt 4 is stretched in parallel between a pair of pulleys 3 and 6 of equal diameter. In this embodiment, one pulley 6 is pivoted on the left end of the rod □'7 to apply a predetermined tension to the test belt 4, similar to the device shown in FIG. It is pivoted to a stand 10 fixed to a frame.

11 is a slider that can move parallel to the belt 4, and has an angle of 12°1.
2' is a guide for this purpose, and the slider 11 is reciprocated parallel to the test belt 4 between guides 12 and 12' by the crank mechanism 1 and lever 2. Reference numeral 13 denotes an arm that transmits the movement of the slider to the test belt 4. The left end of the arm 13 is connected to a fixture 14 on the test belt 4, and the right end is connected to the slider 11.

In operation, the slider 11 is driven by the crank mechanism 1.
reciprocates, thereby moving the test belt 4 to the pulleys 3,
The test belt 4 is reciprocated in parallel along the
The test will be carried out.

At this time, a predetermined amount of tension is applied to the belt under test by a weight 5, but this may be replaced by a hydraulic cylinder, an air cylinder, etc. Furthermore, the pulleys 3 and 3' can be tensioned by changing their diameters. This makes it possible to perform tests with different bending radii applied to the belt. Furthermore, the stroke of the test belt can be adjusted by adjusting the arm length of the crank mechanism.

As described above, in the present invention, since the test belt is wound between a pair of pulleys of equal diameter, the test can be performed with the belt stretched in parallel, and as a result, the tension angle of the belt is It is always constant and can provide a thick stroke of a desired amount.

Furthermore, by arranging a plurality of pairs of pulleys in one apparatus, a plurality of belts can be tested with one test apparatus, thereby improving the performance of the test apparatus.

[Brief explanation of the drawing]

Figure 1 is a skeleton diagram of a conventional belt bending test device.
FIG. 2 is a skeleton diagram of a belt bending test device according to an embodiment of the present invention. 3.3'...Boo 1), 4-...Test belt, 11
... Slider, 12, 12... Guide. Agent: Patent Attorney Shin Ogawa − Patent Attorney Ken Noguchi Teru Patent Attorney Kazuhiko Saishita

Claims (1)

[Claims] One of the pair of pulleys on which the test belt is attached is rotatably attached to the machine frame, and the other pulley is arranged so as to be rotatable so as to apply the required tension to the test belt. A guide parallel to a straight line passing through the rotation axis of the pair of pulleys is provided on the machine frame, a slider that moves along the guide is provided, and the test belt is attached and detached from the slider. A belt bending test device characterized in that the test belt is freely connected and driven as the slider moves.