JP2002156220A - Measuring apparatus for peripheral length of ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring apparatus, for a peripheral length, by which the peripheral length of a metal ring can be measured more precisely by solving the problem that uniform tension cannot be given to a metal roller. SOLUTION: The measuring apparatus is provided with a driving roller 6, a coupled driving roller 8 which is provided in the vertically lower part of the driving roller 6 by keeping a prescribed interval and which is freely raised and lowered with reference to the driving roller 6, a tension-giving means which gives tension to the metal ring W when the metal ring W is stretched on both rollers 6, 8 and a measuring means 15 which detects the displacement of the roller 8 while the metal ring W to which the tension is given by the tension-giving means is being turned and driven by the driving roller 6 and which measures the peripheral length of the metal ring W on the basis of the distance between both rollers 6, 8. The tension-giving means is composed of a shaft support member 7 which shaft-supports the roller 8, which is engaged with a rail member 10 installed in the vertical direction and which is provided to be freely slidable along the rail member 10 and a plumb bob which is provided integrally with the member 7. The measuring means 15 detects the displacement of the roller 8 on a straight line which connects the axial centers of both rollers 6, 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a continuously variable transmission (CV).
The present invention relates to an apparatus for measuring the circumference of a metal ring used for a belt such as T).

[0002]

2. Description of the Related Art For example, a belt for a continuously variable transmission (CVT) used as a transmission for an automobile or the like is constituted by a laminated ring formed by laminating a plurality of endless belt-shaped metal rings in their thickness direction. I have. This type of laminated ring is basically manufactured so that its perimeter and radius are designed values (which are different for each layer), but they always match the designed values with high accuracy. However, in general, a certain degree of variation occurs around a design value due to a manufacturing error. For this reason, when the metal rings of each layer are combined and laminated, the perimeter value of the metal ring of each layer is separately measured after manufacture, and the laminated ring is assembled based on the data.

As a device for measuring the circumference of the metal ring, there is a technique disclosed in Japanese Patent Application Laid-Open No. 11-281342.

The circumference measuring device described in the above publication includes a driving roller and a driven roller provided vertically below the driving roller at a predetermined interval, and a metal ring is wound around both rollers to apply tension. Measuring means for detecting the displacement of the driven roller and measuring the circumferential length of the metal ring from the distance between the two rollers while rotating and driving in the applied state.
The circumference measuring device includes a weight suspended from the driven roller via a wire in order to apply tension to the metal ring. Further, the displacement of the driven roller is measured by bringing the measuring element of the measuring means into contact with an L-shaped member attached to a bracket that supports the driven roller and extending laterally.

According to the circumference measuring device, the metal roller is tensioned by applying tension to the metal roller, and the displacement of the driven roller is measured while being driven to rotate, so that uniform tension is applied to the entire metal ring. The circumference of the metal ring can be measured with high accuracy.

However, since the weight hangs down via a wire, the weight swings and it may not be possible to apply uniform tension to the metal roller. Further, since the displacement of the driven roller is measured at a position protruding laterally from a straight line connecting the axes of both rollers, the swing of the weight, etc.
The measured values fluctuate and may not be measured accurately. Therefore, further improvement is desired.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a circumference measuring device capable of measuring the circumference of the metal ring more accurately in view of the above circumstances.

[0008]

In order to achieve the above object, a ring circumference measuring device according to the present invention is provided with a driving roller and a predetermined interval vertically below the driving roller. A driven roller that can move up and down with respect to the roller, tension applying means attached to the driven roller to apply tension to the metal ring when the metal ring is wound around the two rollers, and Measuring means for detecting the displacement of the driven roller while rotating the metal ring to which the tension has been applied by the driving roller and measuring the circumferential length of the metal ring from the distance between the two rollers. In the measurement device, a shaft supporting member that supports the driven roller and engages with a rail member provided in the vertical direction and is slidably provided along the rail member, and integrally formed with the shaft supporting member. With the provided weight And Ranaru the tensioning means, characterized in that it comprises said measuring means for detecting the displacement of the driven roller on a straight line connecting the axial center of the both rollers.

In the circumference measuring device according to the present invention, the tension applying means includes a shaft supporting member for supporting the driven roller, and a weight integrally provided on the shaft supporting member. The pivot member is engaged with a rail member provided in a vertical direction and is slidably provided along the rail member, so that the weight is hung around both rollers without swinging. Tension can be reliably applied to the metal ring vertically downward.

Further, in the circumference measuring device according to the present invention, since the measuring means detects the displacement of the driven roller on a straight line connecting the axes of the two rollers, the fluctuation of the measured value due to the swing of the weight or the like is obtained. Can be prevented.

Therefore, according to the circumference measuring device of the present invention,
The circumference of the metal ring can be accurately measured.

[0012]

Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a side view of an apparatus for measuring the circumference of a metal ring according to the present embodiment, and FIG. 2 is a front view of the apparatus shown in FIG.

As shown in FIGS. 1 and 2, a circumference measuring device 1 according to the present embodiment is supported by a column 3 erected on a base 2 via a bracket 4 and at the back side of the column 3. Drive roller 6 driven to rotate by a drive motor 5 provided in
And a driven roller 8 pivotally supported by the bracket 7 and provided at a predetermined interval vertically below the driving roller 6.

The bracket 7 is provided with a weight that integrally applies a tension to the metal ring W wound around the driving roller 6 and the driven roller 8, and is perpendicular to the column 3 via an engaging member 9. It is engaged with two rail members 10 provided in the directions, and is slidable along the rail members 10.
Further, a cylinder rod 12 of a cylinder 11 erected on the base 2 is connected to a lower portion of the bracket 7 so that the bracket 7 can be moved upward by the cylinder 11. As a result, the driven roller 8 can be moved up and down with respect to the drive roller 6 via the bracket 7 by the weight of the weight and the urging force of the cylinder 11.

The column 3 is provided with a displacement sensor 15 provided with a probe 14 supported by a support member 13, and the probe 14 is positioned below the bracket 7 on a straight line connecting the axes of the driving roller 6 and the driven roller 8. Is in contact with The probe 14 is urged toward the bracket 7 by a spring member (not shown) or the like, and the tip of the probe 14 is displaced together with the bracket 7.

The bracket 4 for supporting the driving roller 6
Is provided with an upper limit switch 16, and a lower limit switch 17 is provided below the rail member 9.

Next, the operation of the circumference measuring device 1 of the present embodiment will be described.

The circumference correction device 1 is a continuously variable transmission (CVT).
It is used for measuring the circumference of a maraging steel metal belt forming the above belt. In the circumference measuring device 1, first, the bracket 10 and the driven roller 8 supported by the shaft are moved upward by operating the cylinder 10. When the upper portion of the bracket 7 comes into contact with the limit switch 15, the cylinder 10 is stopped, and the metal ring W is wound around the driving roller 6 and the driven roller 8.

Next, when the upward biasing by the cylinder 10 is released, the weight of the weight integrally provided with the bracket 7 causes the bracket 7 and the driven roller 8 supported by the shaft 7 to move downward along the rail member 9. The tension is applied to the metal ring W, and the metal ring W is in a tension state. At this time, since the bracket 7 slides along the rail member 9, it does not swing due to the weight of the weight.

Next, the displacement amount of the driven roller 8 is detected by the displacement sensor 15 while rotating the metal ring W by operating the drive motor 5. The displacement sensor 15 is, for example,
The displacement of the driven roller 8 is detected from the displacement of the probe 14 with reference to the position where the upper portion of the bracket 7 abuts on the limit switch 16. And the displacement sensor 15
The circumference of the metal ring W is calculated from the diameters of the driving roller 6 and the driven roller 8 and the distance between the shafts.

At this time, the probe 14 is connected to the drive roller 6,
Since it is provided on a straight line connecting the axis of the driven roller 8, the displacement amount of the driven roller 8 can be accurately detected. In the circumference correction device 1, the displacement of the driven roller 8 is continuously measured while rotating the metal ring W, and the average amplitude during the constant speed rotation of the metal ring W is used as the displacement of the driven roller 8. Thus, the circumference of the metal ring W can be calculated more accurately.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a metal ring circumference measuring apparatus according to the present invention.

FIG. 2 is a front view showing one embodiment of a metal ring circumference measuring apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Perimeter measuring device, 6 ... Driving roller, 7 ... Bearing member (weight), 8 ... Follower roller, 10 ... Rail member, 1
5 ... Measurement means.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideji Sato 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. F-term (reference) 2F069 AA33 BB29 GG62 HH02 MM02 MM04 NN26

Claims (1)

[Claims] 1. A driving roller, a driven roller which is provided vertically below the driving roller with a predetermined interval, and which can be moved up and down with respect to the driving roller, and a metal ring is wound around both rollers. Tension applying means attached to the driven roller to apply tension to the metal ring, and displacing the driven roller while rotating the metal ring to which the tension is applied by the tension applying means by the driving roller. A measuring device for detecting and measuring the circumferential length of the metal ring from the distance between the two rollers, the circumferential length measuring device comprising: a ring member that supports the driven roller and engages with a rail member provided in a vertical direction; A tensioning means comprising a pivoting member slidably provided along the rail member, a weight integrally provided with the pivoting member, and a straight line connecting the axes of the rollers. With the driven roller Circumference measurement unit of the ring, characterized in that it comprises the said measurement means for detecting a displacement.