JPH11237288A - Device for measuring tension of v belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for measuring the tension of a V belt that can improve tension measurement accuracy. SOLUTION: A tension-measuring device 20 is provided with a first support 22 and a second support 23 that can be rotated each other around a shaft 21, a pressure sensor 28 that is provided at the tip of the first support 22 and can touch a V belt 3, and a first stopper 29 that is provided at the first support 22 and regulates the rotation between the first and second supports 22 and 23. Also, the device 20 is provided with a display device 33 with a display part 32 for individually displaying each detection value of the pressure sensor 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the tension of a V-belt wound between pulleys.

[0002]

2. Description of the Related Art FIGS. 5 and 6 are explanatory views showing a conventional V belt tension measuring device. FIG. 5 is a side view, and FIG.
It is a sectional enlarged view. In these drawings, reference numeral 1 denotes a pulley integrally provided on a driving theory (not shown) for driving a step of an escalator, 2 denotes a pulley integrally provided on an output shaft of a motor (not shown), and 3 denotes these pulleys 1, 2 Is a V-belt to be wound around which is a target of tension measurement. As shown in FIG. 6, for example, four V
The belt 3 is wound. Reference numeral 4 denotes a conventional tension measuring device for the V-belt 3. And a spring 7 capable of urging the sliding body 6. The sliding body 6 has a distance memory 8 (unit:
cm) and a load scale 9 (unit: kg) indicating a load. Rubber rings 10 and 11 are mounted on the distance scale 8 and the load scale 9, respectively.

[0003] The pulley 1 of the drive wheel of the escalator described above.
In the case of the V-belt 3 provided at the portion, when the V-belt 3 is held at an appropriate tension, for example, the load when the V-belt 3 is pressed so as to bend by 5 cm is approximately 5 kg.

When measuring the tension of the V-belt 3, the operator holds the tubular body 5 with one hand and presses the tip of the sliding body 6 against the V-belt 3 to be measured. V-belt 3 adjacent to the rubber ring 10
The sliding body 6 is lowered until the height coincides with the height position of the cylindrical body 5. After visually confirming whether or not the height is matched, the rubber ring 11 attached to the load scale 9 is brought into contact with the lower end of the cylindrical body 5,
For example, at this time, the tension measuring device 4 is pulled up, and if the position of the rubber ring 11 is on the scale of approximately 5 kg, it is determined that the V belt 3 has an appropriate tension. If the position of the rubber ring 11 is, for example, 7, 8 kg larger than 5 kg of the load scale 9, it is determined that the tension is too large, and if it is smaller than 5 kg, for example, about 3 kg, it is determined that the tension is insufficient. Necessary tension measurement processing and the like are performed.

[0005]

In the above-mentioned prior art, it is necessary for the worker to press the sliding body 6 against the V-belt 3 with one hand with a force equivalent to, for example, 5 kg. In addition, since it is necessary to check the distance scale 8 while the arm is swaying, the measurement error is likely to increase, and there is a problem in reliability. Easy to occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation in the prior art, and an object of the present invention is to provide a V-belt tension measuring apparatus capable of improving the precision of tension measurement.

[0007]

In order to achieve this object, the invention according to claim 1 of the present invention comprises a first support and a second support which are rotatable relative to each other about a predetermined axis. A pressure sensor provided at one end of these supports and capable of contacting the V-belt;
And a display device for displaying a value detected by the pressure sensor.

According to the first aspect of the present invention, the degree of restriction of the rotation of the first support and the second support by the restricting member is determined by bending the V-belt. Is set to correspond to a predetermined distance (a dent amount of the V belt) when a pressing force in a direction perpendicular to the V belt is applied to the surface of the V belt. The distal ends of the first support and the second support are gripped while the distal ends of the support are in contact with each other and the distal end of the first support is in contact with the upper extending portion of the V-belt. May be squeezed until the rotation is regulated by the regulating member. Thus, a load when the V-belt is bent by a predetermined distance in a direction orthogonal to the V-belt is detected by a pressure sensor provided on one of the first support member and the second support member, and the detected value is obtained. Is displayed on the display device. The operator determines whether or not this display device substantially matches the value obtained when the tension of the V-belt is appropriate. As described above, the first supporting member and the second
The pressing load corresponding to the tension of the V-belt is automatically detected by the operation of grasping the supporting member of the above, so that the distance scale confirmation work by the operator, which is conventionally performed by the operator, is not required, and the accuracy is high. And a highly reliable V-belt tension measurement can be realized.

Further, according to a second aspect of the present invention, in the first aspect of the present invention, each of the first support and the second support has a plurality of support portions. The pressure sensor is provided at each of the distal ends of the first support, and the display device has a display unit capable of individually displaying the detected values of the pressure sensors.

According to the second aspect of the present invention, a load value corresponding to the tension of a plurality of V-belts can be displayed on the display unit at the same time. It is suitable for measuring the tension when the V-belt is wound.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a V-belt tension measuring apparatus according to the present invention will be described below with reference to the drawings. 1 to 4 are explanatory views showing an embodiment of the present invention. FIG. 1 is a side view, FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. 1, FIG. FIG. 4 is an exploded perspective view of the portion shown in FIG.

In these figures, 1 is a pulley integrally provided on a drive wheel (not shown) for driving a step of an escalator, 2 is a pulley integrally provided on an output shaft of a motor not shown, and 3 is a pulley 1 For example, four V-belts to be measured for the tension wound around 2. These are the same as those shown in FIGS.

Reference numeral 20 denotes a tension measuring device for the V-belt 3 which forms one embodiment of the present invention. This tension measuring device 20
Is provided with a first support 22 and a second support 23 that can rotate with respect to each other about a predetermined shaft 21. As shown in FIG. 4, near the end of the first support 22, a bearing 24 into which the shaft 21 is inserted, and a notch 2 connected to the bearing 24 are provided.
5 is provided. Similarly, a bearing 26 into which the shaft 21 is inserted and a notch 27 connected to the bearing 26 are provided near the end of the support 23. The notch 25 of the first support 22 and the notch 27 of the second support 23 are engaged with each other, and are combined so that the bearings 24 and 26 are connected to each other.
The shaft described above is inserted into these bearings 24,26.

Further, for example, four pressure sensors 28 are provided at the tip of the first support member 22 so as to face the four V-belts 3, respectively. A regulating member for regulating the rotation of the first support 22 and the second support 23, for example, a first stopper 29 is provided. At the tip of the second support member 23, four projections 30 are provided which come into contact with each of the four V-belts 3, and between the shaft 21 and the projections 30, as shown in FIG. A second stopper 31 is provided to prevent the tension measuring device 20 from moving in the extension direction of the V-belt 3.

A display device 33 having four display portions 32 for displaying the values detected by the respective pressure sensors 28.
Is provided.

In the embodiment configured as described above,
The pressing force in the direction orthogonal to the V-belt 3 on the surface of the V-belt 3 in order to deflect the V-belt 3 by the degree of the rotation restriction of the first support and the second support by the first stopper 29. Is set in advance so as to correspond to a predetermined distance (the amount of depression of the V-belt 3) at the time of application.

When measuring the tension of the V-belt 3, the tension measuring device 20 is positioned so that the second stopper 31 abuts on the pulley 2, and then the tension is applied to the lower extension 3a of the V-belt 3. Projection 30 of support 23 of 2
Are brought into contact with each other, and the upper extension portion 3b of the V belt 3
In the state where the tip of the first support member 22, that is, each of the pressure sensors 28, is brought into contact with the first support member 22 and the end portions of the second support member 23, the first stopper 29 is used as the second support member. Until it engages the body 23, i.e. the first support 22,
The second support 23 is squeezed until the mutual rotation is restricted. Thereby, each of the V-belts 3 is bent by a predetermined amount. The load associated with the deflection of the V-belt 3 is detected by each of the pressure sensors 28, and the display unit 3 of the display device 33
2 are individually displayed.

If the load value displayed on each of the display units 32 matches a predetermined load, for example, approximately 5 kg,
It is determined that the tension of the V-belt 3 is properly maintained. If it is larger than 5 kg, it is determined that the tension of the V belt 3 is too large.
It is determined that the tension of the belt 3 is insufficient, and the V belt 3
And a tension adjustment process such as an operation of increasing the tension of the V belt 3 or the like.

According to this embodiment, the first support 2
2. Since the pressing load corresponding to the tension of the four V-belts 3 is automatically detected only by the operation of grasping the second support member 23 with one hand, the distance scale by the operator as conventionally performed is used. The work of squeezing the first stopper 29 so as to abut the second support 23 is performed by holding the cylindrical body which receives a predetermined load with one hand as in the related art. It is more stable than pushing it in,
From these facts, highly accurate and highly reliable tension measurement of the V belt 3 can be realized. Accordingly, the efficiency of the work of measuring the tension of the V-belt 3 is improved, and unnecessary tension adjustment processing can be prevented.

In the above embodiment, the tension of the four V-belts 3 can be measured at the same time, so that it is suitable to be used for the pulley 1 provided on the drive wheel of the escalator. In a transmission mechanism or the like in which only the V belt 3 is attached,
Only one pressure sensor 28 is provided, and one
A configuration in which only two display units 32 are provided may be employed.

[0021]

According to the invention of each claim of the present invention,
Tension measurement can be increased as compared with the related art, and unnecessary tension adjustment processing that has conventionally occurred can be prevented.

The invention according to claim 2 is particularly suitable for measuring the tension of a V-belt wound around a pulley portion provided integrally with a drive wheel of an escalator.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG.

FIG. 3 is a view taken in the direction of arrow B in FIG. 1;

FIG. 4 is an exploded perspective view showing a part shown in FIG. 3;

FIG. 5 is a side view showing a conventional tension measuring device.

FIG. 6 is an enlarged cross-sectional view taken along line CC of FIG. 5;

[Description of Signs] 1 pulley 2 pulley 3 V belt 20 tension measuring device 21 shaft 22 first support 23 second support 24 bearing 25 notch 26 bearing 27 notch 28 pressure sensor 29 first stopper (regulation) Member) 30 Projection 31 Second stopper 32 Display 33 Display

Claims (3)

[Claims] A first rotatable member rotatable with respect to a predetermined axis;
And a pressure sensor provided at one end of one of these supports and capable of contacting the V-belt, and rotation of the first and second supports. And a display device for displaying a value detected by the pressure sensor. 2. A front end of each of the first support and the second support has a plurality of support portions, and each of the front ends of the first support has the pressure sensor. 2. The display device according to claim 1, wherein the display device has a display unit capable of individually displaying each detection value of the pressure sensor.
The tension measuring device for a V-belt described in the above. 3. The tension measuring device for a V-belt according to claim 1, wherein a stopper for preventing the V-belt from moving in an extending direction is provided on the second support.