JPS6239314Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a bending fatigue testing device for a long object.

Conventionally, in order to perform a bending fatigue test on a long object such as a cable, a winding drum 1a, as shown in FIG.
A pair of winding machines 3a, 3b consisting of a winding machine 1b and its driving parts 2a, 2b are installed on a board 4 at a predetermined interval, and a measuring device 5 is arranged in between. is used as the winding side and the other winding machine 3b is used as the supply side to wind up the long object 6 on the winding drum 1a,
At this time, the length of the long object 6 to be wound up on the winding drum 1a is measured using the measuring device 5, and when this length reaches a predetermined length preset in the measuring device 5, the length of the long object 6 is automatically measured. At the same time, the drive section 2a is stopped and the measuring device 5 is reset.This time, the winding machine 3b is set to the winding side, and the winding machine 3
A measuring object 6 of a predetermined length is set on a measuring device 5 with point a on the supply side, and is wound up onto a winding drum 1b, and this is repeated tens of thousands to hundreds of thousands of times to conduct a fatigue test.

However, in this case, a measuring error inevitably occurs due to the accuracy of the measuring device 5 itself or slippage between the long object 6 and the measuring device 5 when the winding drums 1a and 1b are stopped, and this error is caused by the measuring device 5. There is a slight difference between when 3a is used as the winding side and when winding machine 3b is used as the winding side, and as the winding is repeated tens of thousands to hundreds of thousands of times, the difference in measurement error mentioned above becomes integral. As a result, the long object 6 is biased toward one winding machine, and in extreme cases, even if the winding machine on the supply side is empty, the long object 6 may be wound up on the winding side. This method has the disadvantage of causing disconnection of the wire and damage to the winding machine, and therefore, it is inconvenient that the operating condition of the device must be checked from time to time during the test and corrections must be made every time the error reaches a certain value. In addition, inspection work and correction work are required, making reliable automation of the above fatigue test difficult.

The present invention has been devised to address the above-mentioned problems, and its configuration will be explained below with reference to illustrated embodiments.

In FIGS. 2 and 3, numeral 10 indicates one of a pair of winding machines installed on the board 11 at a predetermined interval, as in the conventional case.
The winding drum 12 is composed of a winding drum 12 and a driving section 13 that rotates the winding drum 12.

As shown in FIG.
5 are fixed coaxially, and the flanges are symmetrically attached to the drum body 14 in a radial manner as shown in FIG.
and an annular plate 17 attached to the tip thereof, and between the drum body 14 and the annular plate 17, a fan-shaped space defined by the band plates 16, 16, . . . Translucent portions 18, 18, . . . are provided across the diameter direction.

The winding drum 12 is connected to the drive section 13 fixedly installed on the substrate 11 via a drive shaft 19, and is rotationally driven by a motor (not shown) installed in the drive section 13, so that the winding drum 12 can be rotated into a long length. Thing 2
It is designed to turn over 0.

Further, on the side of the winding drum 12, a light emitter/receiver type optical sensor 2 using, for example, a photo cell is provided.
Mounting plate 2 with 1, 22, and 23 erected on the board 11
4 with screws etc., and the drive unit 13
A reflecting plate 25 is fixed to the side face of the light sensor 21, 22, 23 by pasting or the like at a position facing the light sensor 21, 22, 23, and the light emitted from the light sensor 21, 22, 23 is directed to the light transmitting portion. 18,18...
The long object 20 is turned on or off when the light reaches the reflecting plate 25 through the plate 25, is reflected by the same plate 25, and reaches each sensor again, and the light is wound up on the winding drum 12. It is designed to turn OFF or ON by being shut off by .

In addition, the light sensor 21 allows the light emitted from the sensor to pass through the vicinity of the outer periphery of the drum body 14.
2 and 23, the light emitted from the same sensor is connected to the annular plate 1.
The winding drum 12 is arranged so as to pass through the vicinity of the inner peripheral side of the winding drum
The sensors 22 and 23 detect the empty winding state of the winding drum 12 and the full winding state of the winding drum 12 to control the drive units 13 and 13, respectively. are arranged at intervals wider than the width of the strip plate 16 in the circumferential direction,
The light emitted from one sensor is transmitted to the strip plate 16.
In order to prevent a malfunction such as detecting this as a full state even if the light is blocked by the sensor 22 and 23, the full state is detected only when the lights emitted from both sensors 22 and 23 are blocked at the same time. It's summery.

Note that the other winding machine (not shown) is configured in the same manner as described above, but the optical sensor and the reflecting plate are not attached to the winding machine.

Next, in order to perform a bending fatigue test on a long object using the device of the present invention, one winding machine 10 is set as the winding side and the other is set as the supply side, and the drive unit 13 on the winding side is operated. A long object 2 is placed on the winding drum 12 on the same side.
It is sufficient to wind up the long object 2 on the winding drum 12.
When 0 becomes full, the light from the optical sensors 22 and 23 is blocked by the long object 20, so the optical sensors 22 and 23 detect the full state, and the actuation of the sensor causes the drive unit 13 to is stopped, and the other drive unit is driven to rotate, and the winding machine 10, which has been on the winding side, becomes the supply side, and the other one becomes the winding side, and the long object 20 is wound on the winding drum. When the elongated object 20 on the winding drum 12 on the supply side approaches the empty winding state, the light from the optical sensor 21 that has been blocked by the elongated object 20 passes through the transparent section 18,
18... to reach the reflecting plate 25, the optical sensor 21 detects the empty winding state, and the actuation of the sensor stops the winding-side drive unit and drives the supply-side drive unit 10. This is then counted by a counter (not shown) or the like, and the test is repeated a predetermined number of times.

In the illustrated example, both flanges 1 of the winding drum 12
5, 15 are provided with light transmitting parts 18, 18..., but only one flange 15 is provided with light transmitting parts 18, 18...
may be provided, and the above-mentioned light-transmitting portion 1 may be provided with
8, 18... are not limited to the spaces provided in the flange 15, but may have any shape such as a slit, a long hole, or two circular holes separated in the diametrical direction. etc., and the entire transparent portion 18 may be formed.

Further, the optical sensor is not limited to a reflective type, but may be one in which a light projecting part is placed on one side and a light receiving part is placed facing each other on the other side, and in this case, the reflecting plate 25 is not required.

Furthermore, in the above explanation, the optical sensors 21, 22,
23 and the reflective plate 25 are provided in only one of the winding machines 10, but it goes without saying that both winding machines may be provided with an optical sensor and a reflective plate, and the drive unit may be controlled by the sensor. It is.

As explained above, the present invention is an apparatus for conducting a bending fatigue test on a long object by installing a pair of winding machines at a predetermined interval and winding up the long object alternately between the two winding machines. , the winding machine 10 is the winding drum 1
A winding drum 12 equipped with a pair of flanges 15, 15 at both ends of the winding drum 12, and a drive section 13 for driving the winding drum.
and at least one of the winding drums 12
Each flange 15 has a transparent portion 1 on its flange surface.
8, and optical sensors 21, 22, 23 are provided on the sides of the winding drum 12 to detect winding and unwinding of the long object 20 onto the winding drum 12 through the transparent part 18. Because it is arranged,
The optical sensors 21, 22, 23 can accurately detect the full winding state and the empty winding state of the winding drum 12, and by controlling the drive unit 13 with the same sensors 21, 22, 23, the number 10,000 to several 10
Bending fatigue tests can be performed ten thousand times without any problems, and breakage of long objects and damage to the winding machine can be prevented, so there is no need to monitor the equipment.
Tests can be conducted safely and with low operating costs.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional bending fatigue testing device, and FIGS. 2 and 3 are a partially cutaway side view and a front view of essential parts showing an embodiment of the bending fatigue testing device according to the present invention. . 10... winding machine, 12... winding drum, 13...
... Drive section, 14 ... Winding barrel, 15 ... Flange, 1
8... Transparent part, 20... Long object, 21, 22, 2
3...Light sensor.

Claims (1)

[Scope of utility model registration request] In an apparatus in which a pair of winding machines are installed at a predetermined interval, and a bending fatigue test is performed on a long object by alternately winding up the long object on both winding machines, the winding machine The winding drum includes a pair of flanges at both ends thereof, and a drive section for driving the winding drum, and at least one flange of the winding drum is provided with a transparent portion on its flange surface, and A bending fatigue testing device for a long object, comprising an optical sensor disposed on the side of the winding drum to detect winding and unwinding of the long object onto the winding drum through the transparent part.