JP2007298302A - Belt hardness measuring tool, and measuring method of belt hardness using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber hardness measuring tool capable of measuring highly accurately without dismantling a belt. <P>SOLUTION: This belt hardness measuring tool 1 is characterized by having a belt positioning means 6 connected to a belt hardness measuring means 2 whereupon a guide groove 3 for positioning the belt is formed corresponding to the irregular surface of the belt; and a pressing force control means 15 for fixing the belt 30 at the belt hardness measuring time, and controlling a pressing force of the belt hardness measuring means 2 onto the belt 30. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a belt hardness measuring jig for measuring the belt hardness of a power transmission belt used in automobile engines, general industrial machines, and the like.

In automobile engines and general industrial machinery, the power transmission belt that is suspended between the power-side pulley and the driven-side pulley and used to transmit power from the power-side pulley to the driven-side pulley has friction and surrounding atmosphere. Rubber hardness increases with temperature. When the rubber hardness increases, there is an increased risk of damage from the rubber portion where the hardness has reached the limit, or due to this, the belt breaks. Therefore, the management of rubber hardness is regarded as important in order to eliminate operation troubles such as automobile engines and general industrial machines. For this reason, in order to prevent damage to the rubber part of the power transmission belt, breakage of the belt, etc., measures are taken to replace the power transmission belt that has been used for a certain period of time.

  A conventional rubber hardness measuring jig is shown in FIG. This kind of rubber hardness measuring jig 100 is composed of a pointer 103 indicating the rubber hardness with respect to a rubber hardness scale plate 102 provided in the main body case 101 and a spring force of a measuring spring (not shown) attached to the pointer 103. The measuring needle 104 protrudes from the pressure surface 101A of the case 101. The rubber hardness is measured with respect to the tip surface 107A of the convex portion 107 of the rubber power transmission belt 106 in which the measurer places the measuring needle 104 of the rubber hardness measuring jig 100 on the holding plate 105 together with the pressing surface 101A. And pushed it vertically.

However, the orientation of the measuring needle 104 of the rubber hardness measuring jig 100 to the vertical direction with respect to the rubber power transmitting rubber 106 in the prior art is such that the measuring needle 104 of the rubber hardness measuring jig 100 is transmitted to the rubber power transmission in the sense of the measurer. The belt 106 is pressed against the convex portion 107. Therefore, some measurers cannot always press the measuring needle 104 in the same direction with high accuracy, and an error occurs in the measured rubber hardness. In particular, since it becomes difficult to press the measuring needle 104 against the tip of the convex portion 107 formed on the rubber power transmission belt 106, the error tends to increase.

Further, since it is necessary to hold the rubber power transmission belt 106 in parallel with the holding plate 105 when measuring the rubber hardness, the rubber power transmission belt 106 incorporated in an automobile engine, a general industrial machine, or the like. The rubber hardness could not be measured. Therefore, at present, the belt 106 is removed when it is necessary to measure the rubber hardness of the rubber power transmission belt 106 from an automobile engine or a general industrial machine. Therefore, the belt 106 is removed when it is necessary to measure the rubber hardness of the rubber power transmission belt 106 from an automobile engine, a general industrial machine, or the like. For this reason, it has been desired to develop a measuring jig that can measure the rubber hardness of the rubber power transmission belt 106 in a state where the rubber power transmission belt 106 is incorporated in an automobile engine or a general industrial machine.

The present invention has been made to solve such a problem. When measuring the rubber hardness of a rubber power transmission belt incorporated in an automobile engine or general industrial machine, the belt is not removed. An object of the present invention is to provide a rubber hardness measurement jig capable of measuring with high accuracy.

The present invention provides a belt hardness measuring jig having belt hardness measuring means for measuring, as belt hardness, a moving distance of a measuring needle pressed against a belt by a pressure surface and pressed back by a reaction force from the belt. Belt positioning means corresponding to the surface and formed with a guide groove for positioning the belt; and a pressing force control means for fixing the belt at the time of measuring the belt hardness and controlling the pressing force of the belt hardness measuring means to the belt. It has a belt hardness measuring jig.

The invention according to claim 2 is the belt hardness measuring jig according to claim 1, wherein the pressing force control means is a contact plate that comes into contact with the back surface of the belt, and a belt cover plate integrated with the corresponding plate. .

According to a third aspect of the present invention, the belt positioning means has a guide groove extending along a longitudinal direction of the belt hardness measuring jig and an opening for fitting the pressure surface of the belt hardness measuring means. 2 in the belt hardness measurement jig.

  The invention according to claim 4 is the belt hardness measuring jig according to claim 1, wherein the power transmission belt is a V-ribbed belt, and the guide groove of the belt positioning means has a shape corresponding to the V-rib of the belt. .

  The invention according to claim 5 is a belt hardness measurement method in which a pressing surface is pressed against a belt and a moving distance of a measuring needle pushed back by a reaction force from the belt is measured as belt hardness. Correspondingly, a belt positioning means having a guide groove for positioning the belt is connected to the belt hardness measuring means, and the belt is placed by the pressing force control means for controlling the pressing force of the belt hardness measuring means to the belt. Then, the belt hardness is measured by bringing the pressing force control means on which the belt is placed close to the belt hardness measuring means and pressing the measuring needle against the belt to measure the belt hardness.

  The invention according to claim 6 is a backing plate in which the pressing force control means abuts on the back surface of the belt, and a belt cover plate integrated with the corresponding plate, and the cover when the pressing surface is pressed against the belt. 6. The belt hardness measuring method according to claim 5, wherein the pressing force of the belt hardness measuring means to the belt is controlled by performing alignment between the plate and the positioning means.

  The invention according to claim 7 is characterized in that the belt positioning means has a guide groove extending along the longitudinal direction of the belt hardness measuring jig and an opening for fitting the pressure surface of the belt hardness measuring means. 6. The method of measuring the belt hardness described in 6.

  According to an eighth aspect of the present invention, the power transmission belt is a V-ribbed belt, and the guide groove of the belt positioning means has a shape corresponding to the V-rib of the belt. It is in the measurement method.

  According to the first aspect of the present invention, the belt positioning means connected to the belt hardness measuring means corresponding to the uneven surface of the belt and formed with a guide groove for positioning the belt, and the belt is fixed when the belt hardness is measured. In addition, since the belt hardness measuring jig has a pressing force control means for controlling the pressing force of the belt hardness measuring means to the belt, the belt is incorporated in an automobile engine or general industrial machine. Even so, the guide groove of the belt positioning means is fitted to the convex part of the belt, and the position of the belt is determined. In this state, the belt is fixed by the pressing force control means, and the pressing force of the belt hardness measuring means to the belt By controlling the belt hardness and controlling the belt hardness, for example, even if the pitch of the convex portion or concave portion of the belt is reduced, the belt hardness is easily increased. Every time the front end of the convex portion of the belt, or it is possible to measure the belt hardness against the bottoms of the recesses, also the variation of the measuring force is eliminated for measuring each of the belts of the belt hardness.

According to the invention described in claim 2, the pressing force control means is a contact plate that contacts the back surface of the belt, and a belt cover plate integrated with the corresponding plate, and when the pressing surface is pressed against the belt, From the belt hardness measuring jig according to claim 1, wherein the pressing force of the belt hardness measuring means to the belt is controlled by performing alignment between a cover plate and the positioning means.
By determining in advance the positions of the cover plate and the positioning means when the belt hardness measuring means presses the belt, there is no variation in the measured value of the belt hardness by the measurer.

  According to a third aspect of the present invention, the belt positioning means has a guide groove extending along the longitudinal direction of the belt hardness measuring jig and an opening for fitting the pressure surface of the belt hardness measuring means. Alternatively, the belt hardness measuring jig described in 2 can reduce the space for measuring the belt hardness, and the belt hardness can be measured without error even when the belt is suspended in a narrow place.

  According to a fourth aspect of the present invention, in the belt hardness measuring jig according to the first aspect, the power transmission belt is a V-ribbed belt, and the guide groove of the belt positioning means has a shape corresponding to the V-rib of the belt. For this reason, it is particularly suitable for measuring the hardness of a V-ribbed belt having irregularities that are difficult to measure.

  According to the fifth aspect of the present invention, belt positioning means corresponding to the uneven surface of the belt and having a guide groove for positioning the belt is connected to the belt hardness measuring means, and the belt hardness measuring means is connected to the belt. The belt is placed by the pressing force control means for controlling the pressing force of the belt, the pressing force control means on which the belt is placed is brought close to the belt hardness measuring means, and the belt hardness is measured by pressing the measuring needle against the belt. Therefore, even if the belt is incorporated in an automobile engine or general industrial machine, the guide groove of the belt positioning means is fitted to the convex portion of the belt. In this state, the belt is fixed by the pressing force control means, and the belt hardness is measured by controlling the pressing force of the belt hardness measuring means to the belt. Therefore, even if the pitch of the convex part or concave part of the belt is reduced, it is possible to measure the belt hardness by pressing it against the tip of the convex part of the belt or the bottom of the concave part with high accuracy. In addition, there is no variation in the measuring force with respect to the belt every time the belt hardness is measured.

  According to the invention described in claim 6, the pressing force control means is a contact plate that contacts the back surface of the belt, and a belt cover plate integrated with the corresponding plate, and when the pressing surface is pressed against the belt, 6. The belt hardness measuring method according to claim 5, wherein the pressing force of the belt hardness measuring means on the belt is controlled by performing alignment between a cover plate and the positioning means. By predetermining the positions of the cover plate and the positioning means when the belt is pressed, there is no variation in the measured belt hardness by the measurer.

  According to a seventh aspect of the present invention, the belt positioning means has a guide groove extending along the longitudinal direction of the belt hardness measuring jig and an opening for fitting the pressure surface of the belt hardness measuring means. Alternatively, the belt hardness measuring jig described in 2 can reduce the space for measuring the belt hardness, and the belt hardness can be measured without error even when the belt is suspended in a narrow place.

  According to an eighth aspect of the present invention, in the belt hardness measuring jig according to the first aspect, the power transmission belt is a V-ribbed belt, and the guide groove of the belt positioning means has a shape corresponding to the V-rib of the belt. For this reason, it is particularly suitable for measuring the hardness of a V-ribbed belt having irregularities that are difficult to measure.

Hereinafter, the best mode for carrying out the present invention will be described.
In FIG. 1 and FIG. 2, reference numeral 1 denotes a belt hardness measuring jig for connecting a belt positioning means 6 to the belt hardness measuring means 2. The belt hardness measuring means 2 that can be obtained as a commercially available product is a hardness scale plate 16 provided in the main body case 14, a pointer 14 indicating the belt hardness with respect to the scale plate 16, and attached to the pointer 14. When pressed against the power transmission belt which is the object of belt hardness measurement together with the pressure surface 7 provided at the lower end of the main body case 4 by the spring force of the measurement spring (not shown), the reaction force of the rubber part of the power transmission belt is The moving distance of the measuring needle 5 pushed back into the main body case 14 against the spring force of the measuring spring is transmitted to the pointer 14 as belt hardness. As a result, the belt hardness measuring means 2 rotates the pointer 14 so as to be proportional to the moving distance by which the measuring needle 5 is pushed back, and stops at the position of the scale plate 16 corresponding to the rubber hardness. The belt hardness is shown.

The belt positioning means 6 is attached to the lower end portion of the main body case 4 of the belt hardness measuring means 2. An opening 17 is provided in the belt positioning means 6 so that the pressing surface 7 provided at the lower end of the main body case 4 can be inserted. The belt positioning means 6 is formed with a guide groove 3 for positioning the belt corresponding to the uneven surface of the belt.

The pressing force control means 15 includes a contact plate 19 that contacts the back surface of the belt 30 and a belt cover plate 11 that is integrated with the plate 19. When the belt hardness is measured, the pressing force control means 15 places the belt 30 while contacting the back surface of the belt 30 with the abutting plate 19 and pushes the belt 30 toward the belt hardness measuring means 2. The belt concavo-convex portion and the guide groove 3 of the belt positioning means 6 are fitted, and the pressure surface 7 is in contact with the convex top surface of the belt concavo-convex portion, and the hardness of the belt 30 is measured. At this time, when the top portion 12 of the belt covering plate 11 reaches a predetermined position of the belt positioning means, the pressing of the rubber hardness measuring means 2 against the belt 30 is stopped. By doing so, the pressing force with which the belt hardness measuring means presses the belt 30 becomes constant, and the measurement value does not vary by the measurer.

  As an example of a transmission belt, a belt used to transmit the rotational force of an automotive engine to auxiliary equipment of an automotive internal combustion engine such as a cooling fan cooling, an alternator, a water pump, a compressor, and a power steering pump is shown in FIG. As shown, a V-ribbed belt is used. This V-ribbed belt is an annular belt formed by laminating a rib layer 31, an adhesive rubber layer 32, and a back cloth layer 33 in this order. The ribbed belt 35 is continuously formed with rib convex portions 35 and V-shaped rib concave portions 36 having a predetermined pitch P in the width direction B orthogonal to the extending direction A. And the V-shaped rib concave portion 36 are continuously formed, and the convex portion 35 and the concave portion 36 extend in the belt extending direction A. In the adhesive rubber layer 32, a plurality of core wires 37 functioning as reinforcements extending in the extending direction A of the belt 30 are interposed in parallel with each other at a constant interval. The present invention is particularly effective for measuring the rib hardness of a V-ribbed belt.

Further, in order to facilitate the measurement of the belt hardness of the rib layer 31 of the V-ribbed belt used in the automobile engine, the positioning means 6 has a rib projection 35 of the V-ribbed belt as shown in FIGS. The guide groove 3 is formed continuously along the longitudinal direction of the positioning means 6. The guide groove 3 has a recess 21 having the same pitch P as the belt 30 and a V-shaped protrusion 23. . Further, as shown in FIG. 2, the guide groove 3 and the measuring needle 5 of the belt hardness measuring means 2 are obtained by engaging the concave portion 21 and the convex portion 23 of the guide groove 3 with the rib convex portion 35 and the rib concave portion 36 of the V-ribbed belt. Sometimes, the measuring needle 5 can be positioned so as to be pressed perpendicularly to the tip surface 39 of one rib convex portion 35 of the V-ribbed belt. Thus, after the V-ribbed belt is placed and supported on the abutting plate 19 of the pressing force control means 15, when the pressing force control means 15 is moved to the belt hardness measuring means 2 side, the measuring needle 5 protrudes and the V-ribbed belt is protruded. The pressing surface 7 of the main body case 4 is then pressed against the tip surface 39.

  As described above, the configuration of the rubber hardness measurement jig 1 in the embodiment of the present invention is configured as described above. Next, the rubber hardness measurement jig 1 was incorporated into an automobile engine using the rubber hardness measurement jig 1. The procedure for measuring the belt hardness of the V-ribbed belt will be described with reference to FIGS. First, for example, as shown in FIG. 9, the V-ribbed belt is suspended and assembled between a drive pulley 42 fixed to a rotating shaft 41 of an automobile engine 40 and a driven pulley 44 connected to a cooling fan unit 43. Assume that

  Thus, the V-ribbed belt is mounted on the contact plate 19 of the pressing force control means 15 as shown in FIG. Then, the pressing surface of the belt hardness measuring unit 2 is inserted into the belt positioning unit 6 and the pressing force control unit 15 on which the V-ribbed belt 9 is placed is moved in the direction of the pressing surface as shown in FIG. After the rib convex portion 35 and the rib concave portion 36 are engaged with the concave portion 21 and the convex portion 23 of the guide groove 3 of the belt positioning means 6, the top portion 12 of the belt covering plate 11 of the pressing force control means 15 is connected to the belt positioning means 6. The pressing force control means is pressed in the direction of the pressing surface 7 until the predetermined position is reached. At this time, the measuring needle 5 of the belt hardness measuring means 2 is pressed together with the pressing surface 7 to the front end surface 39 of one convex portion 35 of the V-ribbed belt with a predetermined pressing force F. As a result, the measuring needle 5 of the rubber hardness measuring means 2 is pushed back toward the main body 10 against the spring force of the measuring spring by the reaction force from the V-ribbed belt, and is proportional to the moving distance of the pushed back measuring needle 5. Then, the pointer 14 is rotated to stop at the scale plate 16 corresponding to the belt hardness, and the belt hardness is indicated. Then, when the top 12 of the belt covering plate 11 of the pressing force control means 15 reaches a predetermined position of the belt positioning means 6, the pointer 14 of the belt hardness measuring means 2 is read and the hardness at that time is defined as the belt hardness. Therefore, the belt hardness can be measured without causing variation by the measurer.

  Further, the guide groove 3 formed in the belt positioning means 6 is formed so as to extend along the longitudinal direction of the belt positioning means 6, but is not limited to this, and the V-ribbed belt is suspended. The guide groove 3 may be formed so as to extend in the width direction of the belt positioning means 6 depending on the size of the space between the engine incorporated and the auxiliary device of the internal combustion engine such as a cooling fan. Alternatively, it may be formed to extend obliquely.

It is the front view which showed the state which assembled | attached the belt positioning means to the belt hardness measurement means in embodiment of this invention. It is the side view which showed the state which is measuring the belt hardness of a V ribbed belt with the rubber hardness measuring jig in embodiment of this invention. It is the schematic which showed the belt positioning means in embodiment of this invention. It is AA sectional drawing of FIG. It is the schematic which showed the pressing force control means in embodiment of this invention. It is the schematic which showed the pressing force control means in embodiment of this invention. It is the schematic which showed the state which mounted the V-ribbed belt in the pressing force control means. It is a section perspective view showing composition of a V ribbed belt by which belt hardness is measured with a belt hardness measuring jig in an embodiment of the invention. It is a schematic diagram which shows the state by which the V-ribbed belt was integrated in the motor vehicle with the belt hardness measuring jig in embodiment of this invention. It is a front view which shows the belt hardness measuring jig in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Belt hardness measurement jig | tool 2 Belt hardness measurement means 3 Guide groove 4 Main body case 5 Measuring needle 6 Belt positioning means 7 Pressurization surface 10 Main body 11 Belt cover board 12 Top 14 Pointer 15 Pressing force control means 16 Scale plate 17 Opening 19 Plate 21 Convex part 23 Concave part 30 Belt

Claims (8)

  In a belt hardness measuring jig having a belt hardness measuring means for measuring a moving distance of a measuring needle pushed back by a reaction force from the belt as a belt hardness by pressing a pressing surface against the belt, the belt hardness measuring jig corresponds to the uneven surface of the belt. A belt positioning means connected to the belt hardness measuring means in which a guide groove for positioning the belt is formed, and a belt for fixing the belt at the time of measuring the belt hardness and controlling a pressing force of the belt hardness measuring means to the belt A belt hardness measuring jig having force control means.   The pressing force control means is a backing plate that abuts against the back surface of the belt, and a belt cover plate that is integrated with the corresponding plate, and when the pressing surface is pressed against the belt, between the cover plate and the positioning means The belt hardness measuring jig according to claim 1, wherein the pressing force of the belt hardness measuring means to the belt is controlled by performing alignment.   The belt hardness measuring jig according to claim 1 or 2, wherein the belt positioning means has a guide groove extending along a longitudinal direction of the belt hardness measuring jig and an opening for fitting a pressure surface of the belt hardness measuring means. .   The belt hardness measuring jig according to any one of claims 1 to 3, wherein the power transmission belt is a V-ribbed belt, and the guide groove of the belt positioning means has a shape corresponding to the V-rib of the belt.   In a belt hardness measurement method in which a pressing surface is pressed against a belt and a moving distance of a measuring needle pushed back by a reaction force from the belt is measured as belt hardness, positioning of the belt is performed corresponding to the uneven surface of the belt. The belt positioning means formed with the guide groove is connected to the belt hardness measuring means, and the belt is placed by the pressing force control means for controlling the pressing force of the belt hardness measuring means to the belt, and the pressing on which the belt is placed is placed. A belt hardness measuring method, wherein the belt hardness is measured by bringing a force control means closer to the belt hardness measuring means and pressing a measuring needle against the belt.   The pressing force control means is a backing plate that abuts against the back surface of the belt, and a belt cover plate that is integrated with the corresponding plate, and when the pressing surface is pressed against the belt, between the cover plate and the positioning means The belt hardness measuring method according to claim 5, wherein the pressing force of the belt hardness measuring means on the belt is controlled by performing alignment.   The belt hardness measuring method according to claim 5 or 6, wherein the belt positioning means has a guide groove extending along a longitudinal direction of a belt hardness measuring jig and an opening for fitting a pressure surface of the belt hardness measuring means. . The belt hardness measuring method according to any one of claims 5 to 7, wherein the power transmission belt is a V-ribbed belt, and the guide groove of the belt positioning means has a shape corresponding to the V-rib of the belt.

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