JP3175256U - measuring device - Google Patents

Abstract

In a measuring apparatus for measuring the bending hardness of a shaft, a position where a force becomes zero is accurately set (zero adjustment is possible), and a highly accurate measuring apparatus for a golf shaft is provided.
A measuring apparatus 1 for bending a horizontally installed golf club shaft S at three points and measuring the bending hardness of the shaft S. The measuring apparatus 1 includes a right fixing portion 2 for fixing the shaft S and a left side. It has a fixed part 3, and a measuring part 4 between the right fixed part 2 and the left fixed part 3, and the measuring part 4 applies a load to the shaft S by moving horizontally, The direction is a direction perpendicular to the longitudinal axis direction of the shaft S.
[Selection] Figure 1

Description

  The present invention relates to a measuring device that bends a horizontally installed golf club shaft at three points and measures the bending hardness of the shaft.

  A golf club is an indispensable tool for enjoying golf. This golf club is composed of a grip, a shaft, and a head in this order from the user side. The shaft that connects the grip gripped by the user and the head for hitting the ball is a very important component.

This shaft is made of hickory, steel, a composite material of carbon fiber, or the like. The bending strength of the shaft has a great influence on the golf ball.
As a result, it is important to select the bending hardness of the shaft in accordance with the swing speed of the player. Generally, the bending hardness of the shaft improves in the order of L, A, R, S, and X.
Such measuring instruments for measuring the bending hardness of the shaft have been developed. (For example, Patent Document 1)

Furthermore, the bending hardness varies depending on the shaft position such as the grip side, the middle, or the head side. Generally, it is said to be in front, middle, and first.
Such a device for measuring the bending hardness of shafts at different positions has been disclosed. (For example, Patent Document 2)

However, in the measuring instruments described in Patent Document 1 and Patent Document 2, a minimum bending occurs due to the weight of the shaft due to its own weight, and accurate measurement is not possible.
That is, depending on the weight of the shaft, it may be slightly suspended (catenary curve) or may be shaped like a “f” by the central measuring instrument. In measurement under these conditions, accurate force cannot be set from zero position (zero adjustment).

JP-A-7-231957

JP 2001-314577 A

  It is an object of the present invention to provide a highly accurate golf shaft measuring device by accurately setting the position where the force becomes zero in the measuring device for measuring the bending hardness of the shaft (allowing zero adjustment). To do.

(Invention of Claim 1)
The invention according to claim 1 is a measuring device that bends a horizontally installed golf club shaft at three points and measures the bending hardness of the shaft, and the measuring device includes a right side fixing portion and a left side fixing the shaft. It has a fixed part and a measuring part between the right fixed part and the left fixed part, the measuring part applies a load to the shaft by moving horizontally, the direction of the horizontal movement is The direction is perpendicular to the longitudinal direction of the shaft.
(Convention of claim 2)
The device according to claim 2 relates to the device according to claim 1, wherein the measuring part has a center fixing part, and each of the right side fixing part, the left side fixing part and the center fixing part has at least three pulleys. The shaft is fixed by, and the shaft can be rotated during the measurement.

(A device according to claim 3)
The invention according to claim 3 is the measuring device according to claim 2, wherein each of the fixed parts is three pulleys, the central fixed part is arranged with two pulleys on the front side in the horizontal movement traveling direction, One pulley is arranged on the far side in the horizontal movement progressing direction, and one pulley is arranged on the front side in the horizontal movement progressing direction and two pulleys on the back side in the horizontal movement progressing direction. It is characterized by arranging.
(Convention of claim 4)
The device according to claim 4 relates to the device according to claim 3, wherein the two pulleys of the central fixing portion are installed in vertical series, and one pulley of the central fixing portion is arranged in the horizontal movement traveling direction. The two pulleys of the right side fixing part and the left side fixing part are installed in series vertically, and each pulley of the right side fixing part and the left side fixing part is in the back of the horizontal movement direction. When the shaft is removed by being elastically biased to the side, the three pulleys included in each of the center fixing portion, the right fixing portion, and the left fixing portion are arranged in a circular filling arrangement.

(Consideration of claim 5)
The device described in claim 5 relates to the device described in claim 4, wherein the measurement part and the central fixing part are arranged on the measurement position adjusting rail, and are moved smoothly in a direction perpendicular to the longitudinal direction of the shaft. The sliding on the measuring position adjusting rail is fixed by a sliding fixture, and the fixing position is a position where the two pulley side surfaces and the shaft side surface of the central fixing portion are in contact with each other in an unloaded state. It is characterized by that.
(Convention of claim 6)
The device described in claim 6 relates to the device described in claim 5, wherein the measuring device is provided with a support, the measuring unit is provided in the center of the support, and from the center of the support to the left and right. An extending guide rail is provided, the right guide rail is provided with a right fixing portion, the left guide rail is provided with a left fixing portion, and the right fixing portion and the left fixing portion are in the longitudinal direction of the shaft. It is possible to move to.
(Convention of claim 7)
The device described in claim 7 relates to the device described in claim 6, and is characterized in that a perfect circle measuring device is provided in at least one of the fixed portions.

(Effect of the device according to claim 1)
According to the first aspect of the present invention, the measuring part moves horizontally and perpendicularly to the longitudinal direction of the shaft. As a result, the position where the force becomes zero is accurately set, and the shaft is measured without being affected by gravity. Therefore, it is possible to measure the shaft bending characteristic around the zero value.
(Effect of the device according to claim 2)
In addition to the effect of the first aspect, in the second aspect of the invention, it is possible to measure the bending characteristic according to the direction of the shaft by slowly rotating the shaft during measurement. The shaft is considered to have uniform bending properties in all directions, but the hickory shaft has a grain structure, the steel shaft is hardened during manufacturing, the carbon shaft has carbon fiber placement, etc. May not have uniform bending characteristics. The device according to claim 2 can measure the bending characteristics in all directions of the shaft as described above.

(Effect of the device according to claim 3)
In addition to the effect of the second aspect, in the third aspect of the invention, the shaft is securely held by the pulley, and the rotation of the shaft can be easily measured.
(Invention effect of claim 4)
In addition to the effect of claim 3, in the device of claim 4, the center line can be horizontally leveled even with a tapered shaft by two pulleys arranged vertically with one pulley that is elastically biased. Can be held. Furthermore, since it is elastically biased, the shaft can be attached with one touch.
In addition, the shaft that is pushed and bent in the direction of horizontal movement of the measuring unit during measurement pushes the center fixing part back from the back and pushes the right fixing part and the left fixing part back from the front. In the device according to the fourth aspect, the valley formed by the two pulleys firmly prevents the shaft from pushing back, and prevents misalignment. When the shaft is removed, the three pulleys are preferably in a circle-filled arrangement.

(Effect of the device according to claim 5)
In addition to the effect of the fourth aspect, in the device according to the fifth aspect, the measurement section and the center fixing section can move on the measurement position adjusting rail. As a result, even if the measurement target is a tapered shaft or a slightly curved shaft, measurement from the zero load state can be performed without imposing a load on the shaft by pressing the convenience of the shape of the measuring instrument. Make it possible.
(Effect of device of claim 6)
In addition to the effect of the fifth aspect, in the device according to the sixth aspect, the positions of both ends of the three-point bending test can be freely changed by the movable right fixing portion and left fixing portion.
For example, in addition to the bending strength of the entire shaft that is measured by installing the right fixed part and the left fixed part at the shaft length width, the front tension of the shaft that is measured by installing it at about 1/3 of the shaft length, The tone and tone can also be measured with this device.
(Effect of the device according to claim 7)
In addition to the effect of the sixth aspect, the device according to the seventh aspect can measure whether or not the shaft is a perfect circle.

FIG. 1 is an overall perspective view of the measuring apparatus during measurement. FIG. 2 is an overall perspective view of the measuring apparatus with the shaft removed. FIG. 3 is an enlarged perspective view of a right part of FIG. FIG. 4 is a right side view of the right side fixing portion. FIG. 5 is an enlarged perspective view of the left part of FIG. FIG. 6 is a right side view of the left fixed portion. 7 is an enlarged perspective view of a central portion of FIG. FIG. 8 is a right side view of the center fixing portion. FIG. 9 is a top view of the center fixing portion. FIG. 10 is an overall top view of the measuring apparatus during measurement. FIG. 11 is an overall top view of the measuring apparatus during head side measurement. FIG. 12 is an overall top view of the measuring apparatus during middle measurement. FIG. 13 is an overall top view of the measuring apparatus during grip side measurement. FIG. 14 is a partial side view of the measuring device during measurement of a perfect circle.

The measuring device of this invention will be described below with reference to the drawings showing embodiments.
In this device, expressions of the front side and the back side are used. Since the measurer stands in front of the handle 41, the handle 41 is on the near side and the swinging pulley shaft 57 is on the far side (see FIG. 7). The expressions “right side” and “left side” are right and left as viewed from the measurer.

FIG. 1 is an overall perspective view of the measuring apparatus 1 during measurement. FIG. 2 is an overall perspective view of the measuring apparatus with the shaft S removed.
[1. Overall configuration of measuring apparatus 1]
The measuring device 1 of the present invention measures the bending strength of the shaft S, and includes a right side fixing part 2, a left side fixing part 3, a measuring part 4, a central fixing part 5, and an abutment 6.

As shown in FIG. 1, the shaft S is attached to the right fixing part 2 on the grip side, attached to the left fixing part 3 on the club head side, and attached to the central fixing part 5 on the center. At this time, the left and right of the shaft S may be interchanged.
Guide rails 60R and 60L are provided on the abutment 6 in order to adjust the position of the length of the shaft S and the measurement location. The guide rail 60R allows the right fixed portion 2 to move horizontally in the longitudinal axis direction of the shaft S, and the guide rail 60L enables the left fixed portion 3 to move horizontally in the longitudinal axis direction of the shaft S. These horizontal movements are fixed at the time of measurement.

As shown in FIG. 1, the shaft 1 is measured with respect to the shaft S fixed in a horizontal straight line by the right side fixing part 2 and the left side fixing part 3, while the central fixing part 5 is in the longitudinal direction of the shaft S. The measuring unit 4 connected to the central fixing unit 5 measures the force that horizontally moves in the vertical direction, the shaft S bends, and the shaft S tries to push back to return to the original linear shape.
As shown in FIG. 2, the measuring unit 4 moves horizontally and bends the shaft S, so that the measurement can be performed in a state where the shaft S is not bent by its own weight.

[2. About the right fixed part 2 and the left fixed part 3]
The right side fixing part 2 and the left side fixing part 3 are configured symmetrically about the vertical axis of the measuring part 4 and the central fixing part 5.
FIG. 3 is an enlarged perspective view of the right part of FIG. 2, and FIG. 4 is a right side view of the right fixing part 2. 5 is an enlarged perspective view of the left part of FIG. 2, and FIG. 6 is a right side view of the left fixing part 3.
As shown in FIGS. 3 and 4, the right fixing portion 2 includes a rail fitting portion 20, a fixing bolt 21, an upper pulley shaft 22, a lower pulley shaft 23, a swinging portion 24, a swinging fulcrum 25, an elastic body 26, A swing pulley shaft 27 is provided.
Similarly, as shown in FIGS. 5 and 6, the left-side fixing part 3 includes a rail fitting part 30, a fixing bolt 31, an upper pulley shaft 32, a lower pulley shaft 33, a swinging part 34, a swinging fulcrum 35, an elastic body. 36, and has a swinging pulley shaft 37.
Thus, since the right side fixing part 2 and the left side fixing part 3 have a line-symmetric configuration, the right side fixing part 2 will be mainly described.

The right fixed portion 2 has a rail fitting portion 20 on the bottom surface side, and this rail fitting portion 20 is attached to a guide rail 60R on the abutment 6 so as to be water smooth and movable as shown in FIG. 3 and FIG. It has been. This smooth water movement can be stopped by tightening the fixing bolt 21.
An upper pulley shaft 22 and a lower pulley shaft 23 are provided on the upper surface side and the right side of the right fixed portion 2. The upper pulley shaft 22 and the lower pulley shaft 23 are provided on a vertical line, and are provided with a distance twice the radius of the pulley P. As a result, the pulleys P that are respectively attached to the upper pulley shaft 22 and the lower pulley shaft 23 are arranged on a vertical line, and the arc outer circumferences of the pulleys P are in contact with each other.

  A swinging portion 24 is provided on the right side of the substantially central portion of the right fixing portion 2. The lower end of the oscillating part 24 is connected by an oscillating fulcrum 25, and the oscillating part 24 can be tilted forward from a substantially vertical state. An elastic body 26 is attached to the approximate center of the swinging portion 24, and the elastic body 26 elastically biases the swinging portion 24 in such a manner that the swinging portion 24 is always pulled to the back side (lower pulley shaft 23 side). ing. A spring panel, rubber, or the like can be used for the elastic body 26.

As shown in FIGS. 3 and 4, a swing pulley shaft 27 is provided at the upper end of the swing portion 24, and a pulley P is attached to the swing portion 24. When the shaft S is removed by the elastic bias described above, the three pulleys P are arranged in a circular filling manner as shown in FIG.
With the circular filling arrangement, the shaft S can be fixed by the three pulleys P by the aforementioned elastic bias (for example, FIG. 14).
Since the structure of the left side fixing part 3 is line symmetrical with the right side fixing part, description thereof is omitted.

[3. About measuring unit 4 and center fixing unit 5]
7 is an enlarged perspective view of the central portion of FIG. 2, FIG. 8 is a right side view of the central fixing portion 5, and FIG. 9 is a top view of the central fixing portion 5.
As shown in FIGS. 7 to 9, the measuring unit 4 includes a push shaft 40, a handle 41, a strain gauge 42, a load cell 43, a table 44, a millimeter unit scale 45, and a micro unit scale 46, and moves to the back side. The force that the shaft S pushes back against the amount is displayed on the display panel 10.
As shown in FIGS. 7 to 9, the central fixing portion 5 includes a measurement position adjusting rail 50, a sliding fixture 51, an upper pulley shaft 52, a lower pulley shaft 53, a swinging portion 54, a swinging fulcrum 55, and an elastic body 56. , A swing pulley shaft 57, a slide amount scale 58, and a base 59.

The push shaft 40 of the measuring unit 4, the handle 41, the strain gauge 42, the load cell 43, the table 44, the upper pulley shaft 52, the lower pulley shaft 53, the swinging portion 54, the swinging fulcrum 55, the elastic body 56, and the swinging pulley shaft 57. 44 and the measurement position adjusting rail 50 can be moved horizontally on the base 59 forward and rearward (perpendicular to the longitudinal direction of the shaft S).
This horizontal movement can be fixed by the sliding fixture 51.
As a result, the load on the shaft S before the measurement can be reliably adjusted to zero (zero adjustment). (Described later)

[4. About fixing the shaft S of the central fixing part 5]
The shaft S of the central fixing portion 5 is fixed by three pulleys P as shown in FIGS. The upper pulley shaft 52 and the lower pulley shaft 53 are arranged in a straight line, the swinging part 54 has a swinging fulcrum 55, an elastic body 56, and a swinging pulley shaft 57, and three pulleys P arranged in a circular filling manner are provided. The shaft S is used and fixed in the same manner as the right side fixing part 2 and the left side fixing part 3.
If it does in this way, in order to fix shaft S with three pulleys P in each of right side fixing part 2, left side fixing part 3, and center fixing part 5, shaft S can be rotated during measurement.

The difference between the center fixing part 5 and the right and left fixing parts 2 and 3 is as follows.
The upper pulley shafts 22 and 32 and the lower pulley shafts 23 and 33 of the left and right fixing portions 2 and 3 are provided on the back side, and the swing pulley shafts 27 and 37 are provided on the front side. On the other hand, the upper pulley shaft 52 and the lower pulley shaft 53 of the center fixing portion 5 are provided on the near side, and the swing pulley shaft 57 is provided on the back side.
If comprised in this way, when the front-end | tip of the push shaft 40 will move to the back | inner side and it will be in the measurement state which curves the shaft S, the pulley of the upper stage pulley shafts 22 and 32 and the lower stage pulley shafts 23 and 33 will be the right and left of the shaft S. P is received, and the upper pulley shaft 52 and the lower pulley shaft 53 push the center of the shaft S.
The upper pulley shafts 22, 32, 52 and the lower pulley shafts 23, 33, 53 are arranged on a vertical line, and the outer circumferences of the pulleys P are in contact with each other. As a result, the shaft S bends in such a manner that the valley formed by the upper pulley shafts 22, 32, 52 and the lower pulley shafts 23, 33, 53 is difficult to enter. As described above, when the pulley P is bent in such a manner that it is difficult to cut into the valley, even if the shaft S is tapered, the center axis of the shaft S is measured.

[5. About the side of pulley P)
As the pulley P, a torus body and an ellipsoid can be used in addition to a cylindrical body having a circular arc cross section as shown in FIGS. Further, when the pulley P is a cylindrical body, the right fixed portion 2 and the left fixed portion 3 may be swingable with respect to the vertical axis.
In this way, even if a load from the push shaft 40 is applied to the shaft S and the shaft S is bent, no extra force that causes a measurement error is generated.

[6. Measurement of shaft S]
Below, the shaft measurement using this measuring device 1 is explained in full detail.
FIG. 10 is an overall top view of the measuring apparatus during measurement.
First, a measurement method will be described based on the measurement of the entire shaft S.

(6-1. Attaching the shaft S)
The measuring apparatus 1 before the attachment of the shaft S is a mode as shown in FIG.
From the state of FIG. 2, the sliding fixture 51 is turned in the releasing direction so that the central fixing portion 5 is slidable forward and backward. Switch 63 is turned on.
The right side fixing part 2 and the left side fixing part 3 are moved to arbitrary positions at which measurement is performed. For example, in FIG.1, FIG.2, FIG.10, it is 35 cm on either side, and is 70 cm in total. After the movement, the right fixing portion 2 and the left fixing portion 3 are fixed to the guide rails 60R and 60L, respectively, using the fixing bolts 21 and 31.
The shaft S is fitted into the three pulleys P in the circular filling arrangement of the right side fixing part 2, the left side fixing part 3 and the center fixing part 5. This fitting is performed by moving the pulleys P attached to the swinging pulley shafts 27, 37, and 57 by the elastic bodies 26, 36, and 56, and sandwiching the remaining two pulleys P, and the shaft S is fixed.
When the shaft S is fixed, the mode shown in FIGS. 1, 10, and 14 is obtained.

(6-2. Confirmation of linearity of shaft S)
The central fixing portion 5 is slidable forward and backward with respect to the fixed shaft S. And the numerical value of the strain gauge 42 shown on the display panel 10 is set to 0 using the adjuster 62 shown in FIGS.
At this time, if the shaft S is rotated about the longitudinal axis, the central portion of the shaft S fixed at both ends to the right fixing portion 2 and the left fixing portion 3 moves the central fixing portion 5, or the numerical value set to 0 increases or decreases. There is a case.
Whether or not the above-mentioned movement occurs can be observed using a sliding amount scale 58 shown in FIG. The above-described sliding and numerical value increase / decrease can be used as an index indicating that the shaft S is not straight. That is, when the measuring apparatus 1 is used, it can be confirmed whether the shaft S is a straight shaft S or a curved shaft S whose longitudinal center is straight.

(6-3. Preparation for bending test)
Next, the sliding fixture 51 is tightened to fix the sliding toward the front and back of the measuring unit 4 and the central fixing unit 5. As for fixing, it is preferable to fix the display panel 10 while maintaining 0 so that an excessive force is not applied to the shaft S. However, the value of the strain gauge can be set to 0 by the adjuster 62 after the sliding fixture 51 is tightened.
By this operation, the shaft S was fixed in a state where no self-weight or bending force due to the pulley P was applied.

(6-4. Bending test)
The upper pulley 52 and the lower pulley 53 of the center fixing portion 5 are moved from the upper and lower sides to the shaft S attached in the above-described manner to move to the back side, and a load is applied.
The above-described load is performed by rotating the handle 41 clockwise and moving the push shaft 40 to the back side. In the first embodiment, when the handle 20 is rotated 360 degrees clockwise, the push shaft 40 is moved 2 mm deeper.
Before the load is applied to the shaft S, the millimeter unit scale 45 and the micro unit scale 46 are set to zero. The micro unit scale can be described as 0.5 mm at 90 °, 1.0 mm at 180 °, and 1.5 mm at 270 °. When the handle 20 is rotated once in the clockwise direction, the millimeter unit scale 45 moves by 2 mm.
In the measurement of the bending test, the load force of the shaft S against the bending amount is measured by the load cell 43 and the strain gauge 42.
The force of pushing back the shaft S (force to return to the original shape) can be a large reference value with respect to the bending of the shaft S that occurs when the golf ball is hit.
For example, in the case of a driver flex R shaft with both ends fixed at 70 cm, when the push shaft 40 is moved 10 mm to the back side, it is pushed back with a force of about 4.0 kgf.

(6-5. Omnidirectional bending test)
Since the measuring apparatus 1 fixes the shaft S with the three pulleys P, the shaft S can be rotated about the longitudinal axis during the above-described bending test.
From this, it is possible to measure the bending characteristic according to the direction of the shaft S. The shaft S is considered to have uniform bending characteristics in all directions. However, the hickory shaft has wood grain, the steel shaft is hardened at the time of manufacture, the carbon shaft has carbon fiber placement, and so on. Bending characteristics may vary. When this measuring apparatus 1 is used, it can be determined whether or not the bending characteristics are uniform in all directions. Specifically, when the shaft S is rotated, the numerical value of the display panel 10 may change (the strength may vary depending on the bending direction). Based on such numerical changes, it is possible to find a preferable bending characteristic in the striking direction, such as adjusting the grain of the baseball wooden bat swing.
When all measurements are completed, the shaft S is removed.

(6-6. Partial bending test)
11 is an overall top view of the measuring device during head side measurement, FIG. 12 is an overall top view of the measuring device during middle measurement, and FIG. 13 is an overall top view of the measuring device during grip side measurement. FIG.
Even in a bending test for checking the front tone, middle tone, tip tone, etc., the shaft S club head side is shown in FIG. 11, the shaft S center is shown in FIG. 12, and the shaft S grip side is shown in FIG. As shown, it can be measured.
As shown in FIGS. 11 to 13, the measurement method is to move the shaft S to the left and right by bringing the right fixed portion 2 and the left fixed portion 3 close to the central fixed portion 5. Further, the distance from the center fixing part 5 to the right side fixing part 2 and the distance from the center fixing part 5 to the left side fixing part 3 may be measured not to be equal.

(6-7. Roundness measurement)
FIG. 14 is a partial side view of the measuring device during perfect circle measurement.
As shown in FIG. 14, a perfect circle measuring instrument 7 can be connected to the right fixed part 2. The perfect circle measuring instrument 7 can be provided not only on the right side fixing part 2 but also on the left side fixing part 3 or the center fixing part 5.
When the perfect circle measuring instrument 7 is provided, as shown in FIG. 14, it is possible to measure whether or not the shaft S is a perfect circle.
The perfect circle measuring instrument 7 has a tex bar 70, a dial 71, and a connecting portion 72, and rotates the shaft S. If it is a perfect circle, the dial 71 remains 0.
However, when the shaft S is not a perfect circle, the depth bar 70 is pushed like a cam, and the dial 71 moves from zero.

[7. About each part)
As the strain gauge 42 and the load cell 43, LC1205-K050 1.5 mV / V at 50 kgf manufactured by A & D Co., Ltd. was used. The cord 11 extends from the strain gauge 42 described above. The cord 11 is connected to a base installed in the abutment 6. The base connects the display of the display panel 10, voltage adjustment by the adjuster 62, power on / off of the switch 63, and the like.

  This device can be applied and used not only as a golf shaft bending test but also as another three-point bending tester.

DESCRIPTION OF SYMBOLS 1 Measuring apparatus 2 Right side fixing part 3 Left side fixing part 4 Measuring part 5 Center fixing part 6 Abutment 7 Roundness measuring device S Shaft P Pulley

Claims (7)

Bend the golf club shaft (S) installed horizontally at three points,
A measuring device (1) for measuring the bending hardness of the shaft (S),
The measuring device (1)
A right side fixing part (2) and a left side fixing part (3) for fixing the shaft (S);
Having a measuring part (4) between the right fixed part (2) and the left fixed part (3);
The measurement unit (4)
A load is applied to the shaft (S) by moving horizontally,
The direction of the horizontal movement is
A measuring device characterized by being in a direction perpendicular to the longitudinal axis direction of the shaft (S). The measurement part (4) has a central fixing part (5),
Each of the right fixed part (2), the left fixed part (3) and the central fixed part (5)
The shaft (S) is fixed by at least three pulleys (P),
The measuring device according to claim 1, wherein the shaft (S) is rotatable during the measurement. The measuring device (1) according to claim 2, wherein each of the fixing parts (2, 3, 5) has three pulleys.
The central fixing part (5)
Place two pulleys (P) on the front side in the horizontal movement direction,
Place one pulley (P) on the far side in the horizontal movement direction,
The right fixed part (2) and the left fixed part (3)
Place one pulley (P) on the front side in the direction of horizontal movement,
2. A measuring apparatus characterized in that two pulleys (P) are arranged on the back side in the direction of horizontal movement. The two pulleys (P) of the central fixing part (5)
It is installed in vertical series,
One pulley (P) of the central fixing part (5)
Elastically biased toward the front side in the direction of horizontal movement,
Each of the two pulleys (P) of the right fixed part (2) and the left fixed part (3)
It is installed in vertical series,
Each pulley (P) of the right side fixing part (2) and the left side fixing part (3)
It is elastically urged to the back side in the direction of horizontal movement,
When the shaft (S) is removed,
Three pulleys (P) each of the central fixing part (5), the right fixing part (2) and the left fixing part (3) have
4. The measuring apparatus according to claim 3, wherein the measuring apparatus is in a circular filling arrangement.
The measurement part (4) and the central fixing part (5)
Arranged on the measuring position adjustment rail (50),
The shaft (S) is capable of water smooth movement in a direction perpendicular to the longitudinal axis direction,
The sliding on the measurement position adjustment rail (50)
It is fixed by a sliding fixture (52),
The fixed position is
5. The measuring device according to claim 4, wherein the two pulleys (P) side surface and the shaft (S) side surface of the central fixing part (5) are in a position where they contact each other in an unloaded state. The measuring device (1) is provided with an abutment (6),
In the center of the abutment, a measuring part (4) and a central fixing part (5) are provided.
Guide rails (60R, 60L) extending left and right from the center of the abutment are provided,
The right guide rail (60R) is provided with a right fixing portion (2),
The left guide rail (60L) is provided with a left fixing part (3).
The right fixed part (2) and the left fixed part (3)
6. The measuring device according to claim 5, wherein the measuring device is movable in the longitudinal axis direction of the shaft. The measuring device according to claim 6, wherein a perfect circle measuring device (7) is provided in at least one of the fixed portions (2, 3, 5).