JP2003139501A - Trim width measuring device and trim height measuring method using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trim width measuring device measuring the trim width of a hexagonal V-belt having a trim position with a belt maximum width in an expanded rubber layer, and a trim height measuring method using it. SOLUTION: In the trim width measuring device 1, the trim width is measured by holding the trim position (a belt maximum width position provided by connecting points P1 and P2) of the V-belt 3 between a recessed part (the angle change point P1) of a gauge head 1L and a recessed part (the angle change point P2) of a gauge head 1R facing each other and forming a taper part and an inverted taper part. In the method, the trim width is measured by the trim width measuring device 1, and at the same time, an upper width is measured by an upper width measuring device 2 and a trim height is measured on the basis of a belt angle α.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt measuring device for measuring the shape and dimension of a V-belt, and more specifically, a trim width measurement for suitably measuring the trim width of a hexagonal V-belt used in a transmission device. The present invention relates to a device and a trim height measuring method using the device.

[0002]

2. Description of the Related Art V-belt cross-sectional shape (width, height, angle)
A caliper shown in FIG. 4 is generally widely used as a belt measuring device for measuring. However, the cross-sectional shape of the V-belt is trapezoidal in cross section in the width direction as shown in FIGS.
Is formed at a belt angle (α), and is fitted into a V-groove pulley having a V-groove angle (α) to transmit friction, so that it can be varied according to conditions such as transmitted power and minimum pulley diameter. A V-belt 3 having a sectional shape is prepared.

That is, the width, height and angle of the belt are varied depending on the magnitude of the power to be transmitted, and the magnitude of the bending load of the belt depending on the pulley diameter is predetermined in the longitudinal direction of the belt. This is dealt with by providing the cog portion at an arbitrary pitch.

As described above, the cross-sectional shape (width, height, angle) of the V-belt 3 varies variously according to the application, and therefore, in order to measure these shape dimensions effectively, it is a target. A dedicated belt measuring device adapted to the shape of the V-belt 3 is required.

Usually, in the V-belt 3, as shown in FIG. 5, the sectional shape of the lower compression rubber layer 3c is a trapezoidal section having a predetermined belt angle (α), and the upper extension rubber layer 3a is also formed. Similarly, a trapezoidal cross section having a belt angle (α) (indicated by dotted lines a and b in the figure) is formed.

However, when the V-belt 3 is used for a high load application, particularly when it is used under severe conditions such as a transmission, the V-belt 3 is repeatedly subjected to stress due to belt bending load and stretched. The rubber layer 3a or the cord layer 3b is peeled off by fatigue. In order to prevent this peeling phenomenon, the stretched rubber layer 3a is trimmed at both end portions in the width direction to have a predetermined trim angle (β).

When the yield of the V-belt 3 product is important, the stretched rubber layer 3a on the V-belt 3 is trimmed at both ends in the width direction to have a predetermined trim angle (β). Yield improves. As a result,
These V-belts 3 have a trim height (size of trim).
However, the hexagonal V-belt 3 is formed as a whole even though there is a difference in degree.

The reference dimension of such a hexagonal V-belt 3 is the belt width (the lower side of the trapezoid), but this belt width is trimmed to an arbitrary shape on both sides of the stretched rubber layer 3a as described above. Therefore, it is not possible to directly measure the size of the contact.

Therefore, as a dimension representative of the belt width, the nominal dimension of the V-belt 3 is usually used, that is, FIG.
The upper width dimension shown in (a) is used. This upper width dimension is
Since it is a virtual size as shown in the figure, it must be calculated accordingly.

An example of the upper width measuring device for measuring the upper width dimension is the belt width measuring device of the present applicant disclosed in Japanese Patent Laid-Open No. 10-153401. This device was processed and assembled so that the inclination angle of the taper portion formed by, for example, the pair of measurement probes of the general-purpose caliper shown in FIG. 4 face each other was the same as the belt angle (α) of the V belt 3. It is a thing. An overall view of the upper width measuring device 2 completed in this way is as shown in FIG. 1 (b).

Hereinafter, referring to FIGS. 3 (a) and 3 (b),
An outline of an upper width measuring method using the upper width measuring device 2 will be described. First, as shown in FIG. 3A, the upper width measuring device 2
Is based on a block gauge with an upper width of amm,
A predetermined scale is formed on the caliper body. The procedure is as follows.

That is, the block gauge (upper width =
amm) is sandwiched between the pair of measurement probes 2L and 2R, and at the same time, adjustment processing is performed so that the linear portions of the measurement probes 2L and 2R in the lower part of the drawing are in perfect contact with each other, and then assembled. In this state, the scale is created so that the indicated value of the scale on the caliper body is the upper width amm of the block gauge.

Next, the above-mentioned upper width measuring device 2 is prepared, and as shown in FIG. 3 (b), the V-belt 3 to be measured is clamped accordingly. The indicated value of the scale at this time is the movement allowance (X) +
Since it is defined by the gauge reference width (a), the operator can read the scale value indicated on the caliper body as it is as the upper width (= X + a). This method is extremely simple and has high work efficiency.

The technique for performing the upper width measurement using a digital caliper with a built-in computer and automating the measurement, recording, and pass / fail judgment is as disclosed in JP-A-10-153401.

Here, the structure of the V-belt 3 according to the present invention will be described.
This will be described with reference to FIG. FIG. 5A shows a V-belt 3 for speed change as an example of the hexagonal V-belt 3, and FIG. 5A is a cross-sectional view in the width direction of the V-belt 3.
FIG. 5B is a longitudinal sectional view.

The V-belt 3 comprises a stretched rubber layer 3a, a cord layer 3b, a compression rubber layer 3a, and upper and lower reinforcing cover cloth layers 3d, but the present invention is not limited to this configuration. The point is that various V-belts having a hexagonal cross section are to be measured.

[0017]

As described above, the upper width of the V belt 3 can be measured by using the upper width measuring device 2 (that is, the V-type caliper). However, in the recent market involving the V-belt 3, the trim width has come to be used as reference data for life determination as a form of utilizing the shape and dimension of the new V-belt 3.

That is, the belt width thinness of the V-belt 3 is measured by measuring the trim width in time series,
This is intended to predict the wear life of the V belt 3. Therefore, it is necessary to manage the trim width and trim height of the V-belt 3 as new geometric dimension data.

By the way, the relationship between the trim width and the trim height shown in FIG. 5A is dependent if the upper width is constant,
If one is measured, the other can be uniquely determined using the geometric formula. Therefore, if the condition that the upper width is constant is satisfied, it is possible to directly calculate the trim height from the measured value of the trim width.

However, since the upper width of the manufactured V-belt 3 necessarily has a statistical variation, the trim height cannot be uniquely obtained only by measuring the trim width.

The trim height can be calculated by simultaneously measuring the upper width and the trim width and using the measured value and the geometric formula. From the above, the present inventors have invented a trim width measuring device described below and a trim height measuring method for calculating the trim height using the trim width measuring device as a technique for simply and accurately measuring the trim width and the trim height. did.

[0022]

That is, the invention described in claim 1 is a trim width measurement for measuring the trim width (maximum width) of a hexagonal V-belt having a belt maximum width trim position in the stretched rubber layer. The device is composed of a caliper body and a pair of measurement probes that are replaceably attached to the caliper body.
The trim width measuring device is composed of a taper portion that holds a region up to the belt upper surface and an inverse taper portion that holds a region up to the V belt bottom surface from the trim position.

According to the second aspect of the present invention, the inclination angle of the taper portion that holds the region from the trim position to the upper surface of the V belt is the same as or smaller than the trim angle of the stretched rubber layer, and the V belt from the trim position. The trim width measuring device according to claim 1, wherein the inclination angle of the reverse taper portion that holds the region up to the bottom surface is the same as the belt angle (V angle) of the compression rubber layer.

A third aspect of the present invention is a trim height measuring method for measuring the trim height of a hexagonal V-belt having a trim position having the maximum belt width on the stretched rubber layer. It is composed of a pair of exchangeable measurement probes, and the pair of measurement probes are opposed to each other by using an upper width measuring device composed of a taper portion which holds a region from the trim position to the bottom surface of the V-belt. The upper width is measured as much as possible, and it is composed of a caliper body and a pair of measuring probes which are replaceably mounted on the caliper body. The pair of measuring probes face each other and hold a region from the trim position to the upper surface of the V belt. Using a trim width measuring device composed of a taper portion and a reverse taper portion that holds the area from the trim position to the bottom of the V belt, measure the trim width accordingly, and From the width and the trim width on obtained by measuring a trim height measuring method for calculating the trim height.

According to a fourth aspect of the present invention, the formula for calculating the trim height from the trim width and the upper width is: trim height =
{(Upper width-trim width) / 2} × {cot (belt angle /
2)} is a trim height measuring method according to claim 3.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1A and 1B are schematic diagrams showing a trim width measuring device and a trim height measuring method according to the present invention. FIG. 1A shows a trim width measuring device, and FIG. 1B shows an upper width measuring device. FIG. 1C shows a trim height measuring method.

FIG. 2 is a schematic view in which the inclination angle of the taper portion of the trim width measuring device according to the embodiment is varied.
FIG. 2A shows a taper portion with a tilt angle of zero, and FIG.
(B) shows a taper part whose inclination angle is the same as the trim angle, and FIG. 2 (c) shows the taper part in the intermediate state.

First, FIG. 1A, FIG. 2A, and FIG.
The trim width measuring device according to the present invention will be described in detail with reference to (b) and FIG. 2 (c). In FIG. 1 (a), the trim width measuring device 1 has a pair of measurement probes 1L and 1R that are replaceably assembled to a caliper body, and sandwiches a V belt 3 to be measured between them, and a trim position P1 shown in FIG. The length between P2 is measured as the trim width.

At this time, the pair of measuring probes 1L and 1R form a taper portion in the upper direction of the drawing and a reverse taper portion in the lower direction of the drawing with the trim positions P1 and P2 as boundaries. Since the trim positions P1 and P2 in the measurement probes 1L and 1R correspond to the inclination angle conversion points of the taper portion and form the recesses, the hexagonal V-belt 3 can be preferably held.

Hereinafter, the operation effect of the measuring probes 1L and 1R, which is the feature of the trim width measuring apparatus 1 according to the present invention, will be described with reference to FIG.
A more detailed description will be given based on (a), FIG. 2 (b), and FIG. 2 (c).

FIG. 2A shows a measurement probe 1'as a comparative example.
The trim width measuring device 1'having L and 1'R is shown, but in this example, the inclination angle of the taper portion is point P1,
The upper part of the drawing (extension rubber layer 3a side) is vertical (γ = 0) with P2 as a boundary, and the lower part of the drawing (compression rubber layer 3c side).
6 is a schematic view showing a positioning state of the V belt 3 in this case, which has a reverse taper portion equal to the belt angle (α) of the V belt 3. FIG.

FIG. 2B shows a trim width measuring apparatus 1 according to the embodiment, in which the inclination angle (γ) of the taper portion in the upper direction of the drawing from the points P1 and P2 is the extension of the V belt 3. It is a figure which shows the positioning state when it is the same as the trim angle ((beta)) of the rubber layer 3a, FIG.2 (c) is FIG.2 (b).
FIG. 7 is a diagram showing a positioning state in which an inclination angle (γ) of the taper portion in the upper direction of the drawing is smaller than a trim angle (β) of the stretched rubber layer 3a of the V belt 3 and at least inclined (γ ≠ 0). Is.

In FIG. 2A, in the measurement probes 1'L and 1'R of the comparative example, since the taper portions of the points P1 and P2 in the upper direction of the drawing are vertical (γ = 0), Set the trim position of V-belt 3 (position of maximum belt width) to point P.
It is difficult to fix between 1 and point P2. That is,
Since it is extremely easy to move the sandwiched points P1 and P2 in the upper direction of the drawing, as a result, the V-belt 3
Is fixed between the measurement probes 1'L, 1'R in an unexpectedly distorted shape, which makes it difficult to measure the trim width accurately.

Therefore, as shown in FIG. 2 (b), the inventor of the present invention measured the measuring probes 1L, 1R with respect to the points P1 and P2 as the boundary between the upper part of the drawing (extension rubber layer 3a side) and the lower part of the drawing (compression rubber). The layer 3c side) was composed of a reverse taper portion. As a result, the points P1 and P2 portions form a concave portion, and the trim position of the V-belt 3 (position of maximum belt width) can be accurately held between the points P1 and P2.

Incidentally, FIG. 2C is an example in which the embodiment of FIG. 2B is further improved, and the features thereof are as follows. That is, the belt angle (α) directly related to the friction transmission force of the V-belt 3 is prioritized, and the inclination angle of the taper portion in the lower direction of the drawing is the same as the belt angle (α), but in the upper direction of the drawing, The trim position of the V-belt 3 (position of the maximum belt width) is limited to the function of accurately positioning between the points P1 and P2.

Specifically, the upper side of the drawing (extended rubber layer 3a
Side) The inclination angle (γ) of the taper portion is set smaller than the belt angle (α). As a result, the recess can be secured and the practical trim width can be measured using the belt angle (α) as the measurement reference plane.

Next, FIG. 1 (a), FIG. 1 (b), and FIG.
The trim height measuring method according to the present invention will be described in detail with reference to FIG. Trim width measuring device 1 shown in FIG.
As described above, the V belt 3 is held between the pair of measurement probes 1L and 1R, and the length of the trim position shown in the figure (point P1 and point P
The distance between the two) is measured as the trim width, and the trim width is measured using this device.

Further, the upper width measuring device 2 shown in FIG.
The upper width of the V-belt 3 is measured using the technique disclosed in Japanese Patent Laid-Open No. 10-153401 by the applicant.
Since the upper width measuring method using the upper width measuring device 2 has been described in the previous stage, detailed description thereof will be omitted here.

After that, the trim height is calculated based on the trim width and the upper width measured by using the trim width measuring device 1 and the upper width measuring device 2. As shown in FIG. 1C, this calculation formula is the same as the formula for obtaining the height of the trapezoid whose upper width is the lower side of the trapezoid and whose trim width is the upper side.

(Formula) Trim height = {(upper width-trim width)
/ 2} × {cot (α / 2)} As described above, using the trim width measuring device 1 according to the present invention shown in FIG. 1 (a) and the upper width measuring device 2 shown in FIG. 1 (b), Since the trim width and the upper width of the V-belt 3 can be easily measured by a simple method, the trim height can be easily calculated based on the measured values of the trim width and the upper width and the belt angle (α). .

Standard trimmer calipers are used for the trim width measuring device 1 and the upper width measuring device 2 of the embodiment, and the trim width measuring device 1 has an inclination angle (γ) of the taper portion on the upper side (extended rubber layer 3a side). ) Is 28 degrees, and the inclination angle of the taper portion in the lower direction is 30 degrees, which is the same as the belt angle (α). or,
The upper width measuring device 2 had a reference width (a) of 9 mm, and the inclination angle of the taper portion was 30 degrees, which was the same as the belt angle (α).

The V-belt 3 used for measuring and evaluating the trim width and trim height has a belt outer peripheral length (BOC).
= 1200 mm, belt thickness = 14 mm, belt upper width =
DCVS (Double Cogged Varia) made by Mitsuboshi Belting, which has 28 mm and a belt angle (α) of 30 degrees.
ble Speed) belt.

As a result, the operation for measuring the trim width using the trim width measuring device 1 was extremely easy, the trim position was firmly fixed, and the reproducibility was excellent.
Further, the method of measuring the upper width by the upper width measuring device 2 concurrently with the measurement of the trim width and obtaining the trim height from the obtained trim width and the measured value of the upper width and the belt angle (α) is extremely simple. It was also highly reproducible.

[0044]

As described above, the invention of claim 1 makes it possible to provide an inexpensive measuring device for easily and accurately measuring the trim width (belt maximum width) of the hexagonal V-belt.

According to the second aspect of the present invention, therefore, the operation of holding the hexagonal V-belt is made extremely easy, and more accurate measurement with excellent reproducibility is possible.

The invention of claim 3 thereby enables an inexpensive method for easily and accurately measuring the trim height of a hexagonal V-belt.

The invention of claim 4 makes it possible to easily calculate the trim height of the hexagonal V-belt based on the measured values of the upper width and the trim width.

[Brief description of drawings]

FIG. 1 is a schematic view showing a trim width measuring device and a trim height measuring method according to the present invention, FIG. 1 (a) shows a trim width measuring device, and FIG. 1 (b) shows an upper width measuring device. , Figure 1
(C) shows a trim height measuring method.

2A and 2B are schematic diagrams in which the inclination angle of the taper portion of the trim width measuring device according to the embodiment is varied, FIG. 2A shows the taper portion with an inclination angle of zero, and FIG. 2B shows the inclination angle. Indicates the same tapered portion as the trim angle, and FIG. 2 (c) shows the tapered portion in the intermediate state.

3A and 3B are schematic diagrams showing an upper width measuring method according to an embodiment, FIG. 3A shows an initial state, and FIG. 3B shows a measuring state.

FIG. 4 is a schematic view showing a conventional caliper.

5 is a view showing a cross section of a V-belt according to the present invention, FIG. 5 (a) is a cross-sectional view in the belt width direction, and FIG.
(B) shows a belt longitudinal direction sectional view.

[Explanation of symbols]

1, 1'trim width measuring device 1R, 1L measurement probe 1'R, 1'L measurement probe 2 Upper width measuring device 2R, 2L measurement probe 3 V belt 3a Stretched rubber layer 3b core layer 3c Compressed rubber layer 3d reinforcing cover cloth layer α belt angle β trim angle γ taper angle of inclination

Continued front page    F term (reference) 2F061 AA19 AA31 CC40 DD22 DD40                       FF09 FF10 FF33 FF41 FF73                       GG04 GG07 GG24 RR18 RR27                 2F062 AA26 AA41 BC04 CC22 EE04                       EE63 GG15 GG29 HH10 HH16

Claims (4)

[Claims] 1. A trim width measuring device for measuring a trim width (maximum width) of a hexagonal V-belt having a maximum belt width trim position on a stretched rubber layer. The pair of measurement probes are opposed to each other, and each of the measurement probes has a taper portion that sandwiches a region from the trim position to the upper surface of the V belt and an inverse taper portion that sandwiches a region from the trim position to the bottom surface of the V belt. The trim width measuring device is characterized by being configured from. 2. The inclination angle of the taper portion that holds the region from the trim position to the upper surface of the V belt is equal to or less than the trim angle of the stretched rubber layer,
The trim width measuring device according to claim 1, wherein an inclination angle of the reverse taper portion that holds a region up to the bottom surface of the belt is the same as a belt angle (V angle) of the compression rubber layer. 3. A vernier caliper main body and a pair of measuring probes replaceably attached to the vernier caliper body in a trim height measuring method for measuring the trim height of a hexagonal V-belt having a trim position of the maximum belt width on a stretched rubber layer. The pair of measuring probes measure the upper width using an upper width measuring device composed of a taper part that faces each other and sandwiches the area from the trim position to the bottom of the V-belt. It consists of a pair of exchangeable measurement probes, and the pair of measurement probes face each other and have a taper portion for narrowing the area from the trim position to the upper surface of the V-belt and a narrower area from the trim position to the bottom surface of the V-belt. The trim width is measured using a trim width measuring device that is composed of the reverse taper that is held, and the trim height is calculated from the measured top width and trim width. How to measure the trim height. 4. The formula for calculating the trim height from the trim width and the top width is trim height = {(top width-trim width) / 2}.
The trim height measuring method according to claim 3, wherein x {cot (belt angle / 2)}.