JPH0569616U - Outside diameter measuring device for bellows products - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Automatically measuring the outer diameter of the bellows,
The measurement time is shortened and the measurement accuracy is improved. [Structure] Holding means 1 for holding a bellows product 2 and two outer diameter displacement amount detecting means 3a, 3b for detecting a radial displacement amount of the bellows 2 in a state of being in contact with the outer periphery of the bellows 2.
And the moving means 17, the bellows product 2 is automatically bellowed from fluctuations in the detected displacement amounts of the first and second outer diameter displacement amount detecting means 3a, 3b simply by holding and rotating the bellows product 2 by the holding means 1. The outer diameter of the product 2 is measured. Further, the holding means 1 is composed of two sets of rollers 6 and 7, and at least one of the rollers 7 and the contact 13 of the outer diameter displacement amount detecting means 3b swings in the axial plane direction of the bellows product 2 and the direction orthogonal thereto. Bellows products 2 placed together on a free table 9
The movement of the outer peripheral surface of the is followed in the horizontal plane. Further, V-shaped grooves are formed on the outer circumferences of the holding rollers 6 and 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for measuring the outer diameter dimension of a bellows product. More specifically, the present invention relates to a device for measuring the outer diameter dimension of bellows products represented by flexible boots such as steering boots and boots for constant velocity joints (CVJ boots), especially the outer diameter dimension of mountain portions.

[0002]

[Prior Art]

 Conventionally, in the case of bellows products, especially those manufactured by blow molding such as steering boots and CVJ boots, it is extremely difficult to obtain products exactly as designed due to residual stress during molding and shrinkage after molding. difficult. Therefore, it is necessary to measure and inspect the dimensions of the bellows product regularly, preferably for all products.

Conventionally, the outer diameter of a bellows product is measured manually by using a caliper or the like.

[0004]

[Problems to be solved by the device]

 However, since it is difficult to manufacture a bellows product in a perfect circle, it is required to divide the outer diameter dimension into 8 parts in the circumferential direction and measure the outer diameter repeatedly at each point. For this reason, in the case of manual measurement using a measuring tool such as a caliper, the measurement takes time, and there is a possibility that the measurement accuracy may vary due to the degree of skill of the operator, the degree of fatigue, and the like. Especially when the outer diameters of the peaks are different, such as CVJ boots and steering boots, it takes a lot of time for measurement.

Further, if the outer diameter of the bellows product is deformed into an elliptical shape due to the influence of residual stress or uneven thickness, etc., accurate measurement of the outer diameter dimension, that is, a normal line or an axis passing through the center of the bellows product is performed. It is difficult to measure the distance between two points where the plane and the outer circumference of the bellows product intersect.

An object of the present invention is to provide an outer diameter measuring device capable of automatically measuring the outer diameter of a bellows product, and to shorten the measuring time. Another object of the present invention is to provide an outer diameter measuring device for a bellows product that improves measurement accuracy. Another object of the present invention is to provide an outer diameter measuring device for a bellows product which enables accurate outer diameter measurement even for a bellows product having an elliptical cross section.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, an outer diameter measuring device for a bellows product of the present invention includes a holding means for holding and rotating a bellows product and a bellows product supported by the holding means, and the bellows product is sandwiched between them. First and second outer diameter displacement amount detecting means for detecting the radial displacement amount of the bellows product in a state of being in contact with the apex of the mountain portion on the outer periphery of the bellows product at two opposing positions, and one outer diameter The displacement amount detecting means and a part of the holding means are composed of moving means for contacting and separating from the bellows product in the same direction as the displacement amount detecting direction.

Further, this outer diameter measuring device measures an approximate outer diameter dimension of a bellows product in a state of being supported by a holding means, based on a moving amount of one movable outer diameter displacement amount detecting means in a separating direction. And a moving amount measuring means for performing the moving amount measurement.

Further, in the outer diameter measuring device for a bellows product of the present invention, the holding means is composed of two sets of rollers arranged substantially symmetrically about the bellows product, and the rollers are the first and second rollers. The outer diameter displacement amount detecting means are evenly installed on the left and right sides, and at least one of the roller and the outer diameter displacement amount detecting means has a contact in the axial plane direction of the bellows product and in a direction orthogonal thereto. Both of them are arranged on a swingable table, and the contact of one outer diameter displacement amount detecting means is made to follow the movement of the outer peripheral surface of the bellows product in the horizontal plane.

Further, in the outer diameter measuring device for a bellows product of the present invention, the holding means for the bellows product comprises a plurality of holding rollers for sandwiching the peaks of the bellows product, and the surface of the holding roller that contacts the bellows product. A V-shaped groove is formed in each of the grooves so that the center lines passing through the bottoms of the grooves are on the same plane.

[0011]

[Action]

 Therefore, the bellows product held by the holding means is sandwiched between the first and second outer diameter displacement amount detecting means and the bellows product is rotated while the bellows product is in contact with the outer peripheral surface of the peak portion of the bellows product to be measured. Then, the first and second outer diameter displacement amount detecting means detect the displacement amount in the radial direction of the bellows product at two points where the axial plane and the outer peripheral surface of the bellows product intersect. Therefore, by replacing the displacement amount at these two points with the displacement from the reference position, the outer diameter dimension of the bellows product can be obtained. For example, when the bellows product set between the holding means and the first and second outer diameter displacement amount detecting means that face each other by driving the moving means is sandwiched, the bellows product supported between them is roughly shown. The outer diameter is measured by the amount of movement of the moving means. Therefore, it is possible to continuously measure the outer diameter dimension by adjusting this displacement amount to the approximate outer diameter dimension measured by the movement amount detecting means in advance.

Further, according to the apparatus of claim 3, one of the holding means for supporting the bellows product and one of the contacts of the outer diameter displacement amount detecting means follow the outer peripheral surface shape of the bellows product. The bellows diameter at the two points where the axial plane of the bellows product and the outer peripheral surface of the bellows product intersect without fail because the contact of the other outer diameter displacement detection device always moves on the line connecting the contact of the displacement detection device and the center of the bellows product. The directional displacement will be measured.

Further, according to the apparatus of claim 4, when the peak portion of the bellows product is caught in the V-shaped groove on the outer peripheral surface of the holding roller, the top portion thereof is guided to the center of the bottom portion of the V-shaped groove. Bellows product is set straight.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail based on the embodiments shown in the drawings. In addition, this embodiment is configured as an apparatus for measuring the outer diameter dimension of the crest portion of the bellows product and at the same time measuring the wall thickness dimension and inner diameter dimension of the crest portion.

1 to 9 show an embodiment of a measuring device to which the device for measuring the outer diameter of a bellows product of the present invention is applied. In this device, a holding means 1 for rotatably holding a bellows product 2 and two points where the axial plane and the outer peripheral surface of the bellows product 2 supported by the holding means 1 intersect (indicated by m and n in FIG. 6). The first and second displacement amount detecting means for measuring the two outer diameter dimensions for detecting the displacement amount in the radial direction of the bellows product in the state where the bellows product 2 is in contact with the apex of the peak portion on the outer peripheral surface at the position (shown below). , First and second outer diameter displacement amount detecting means) 3a, 3b, and either one of the outer diameter displacement amount detecting means, for example, the first outer diameter displacement amount detecting means 3a, and the bellows. The bellows 3 has a third displacement amount detecting means (hereinafter referred to as an inner diameter displacement amount detecting means) 4 for detecting the displacement amount in the radial direction of the product while being in contact with the inner peripheral surface of the product 2. Then, one of the outer diameter displacement amount detecting means, for example, the second outer diameter displacement amount detecting means 3b and a part of the holding means 1, is a moving means capable of coming into contact with and separating from the bellows product 2. The second outer diameter displacement amount detecting means 3a, 3b is mounted on a table (hereinafter referred to as a chucking table) 17 that can move in the same direction as the displacement direction, and two sets of rollers 6, 6 and 7 as a holding means. , 7 and between the first outer diameter displacement detection means 3a and the second outer diameter displacement amount detection means 3b can be changed to allow the bellows product 2 to be taken out and inserted. An X-axis air cylinder 18 for driving is provided on the chucking table 17, and a moving amount detecting means for detecting the moving amount of the chucking table 17 and the second outer diameter displacement detecting means 3b is, for example, an X-axis linear. And a scale 20.

As shown in FIG. 1 and FIG. 2, the holding means 1 for the bellows product 2 is composed of two sets of holding rollers 6, 6 and 7, 7 arranged substantially symmetrically with respect to the bellows product 2. It is provided so as to sandwich the mountain portion of the bellows product 2 between these two sets of holding rollers 6, 6 and 7, 7. One of the holding rollers 6 and 6 is evenly arranged on the left and right of the roller-shaped contactor 12 of the first outer diameter displacement amount detecting means 3a so as to be able to contact the outer peripheral surface of the bellows product 2 on the bed 8. It is fixed. The other holding rollers 7, 7 are mounted on the XY table 9 so as to be evenly arranged on the left and right sides of the roller-shaped contactor 13 of the second outer diameter displacement amount detecting means 3b, and the holding roller 7, 7 It is a movable roller that follows shape changes. The movable holding rollers 7, 7 are installed on the XY table 9 together with the contactor 13 of the second outer diameter displacement amount detecting means 3b. The XY table 9 includes an X-axis slide unit for linearly guiding in the X-axis direction (displacement direction of the first and second outer diameter displacement detection means 3a, 3b) shown in FIG. It has a Y-axis slide unit that enables linear movement in the Y-axis direction that is orthogonal to the X-axis, and enables smooth movement in the X-axis and Y-axis directions with extremely little force on the chucking table 17. It is fixed to. Therefore, when the bellows product 2 has an eccentric motion (state shown by phantom lines) because it is not a perfect circle but an elliptical shape, the outer diameter displacement of the bellows product 2 is only in the X direction as shown in FIG. Although it occurs in the Y direction as well, the movement of the XY table 9 causes the two movable holding rollers 7, 7 to follow the movement of the bellows product 2 while keeping contact with the outer diameter of the bellows product 2. The stationary holding rollers 6 and 6 are directly or indirectly connected to a drive source such as a motor (not shown) via a transmission means, and simultaneously constitute a rotating means for rotating the bellows product 2. Of course, it is also possible to incorporate a rotating means separate from the rollers 6 and 6.

As shown in FIG. 11, the bellows product 2 supported between the stationary holding rollers 6 and 6 and the movable holding rollers 7 and 7 does not deviate from the vertical line (correct set position) and tilt. As shown in FIGS. 7 and 8, V-shaped grooves 11 are formed on the outer circumferences of the rollers 6 and 7. As shown in FIG. 10, if the outer peripheral surface 101 of the roller 100 is simply a vertical surface, the force for holding the bellows product 2 is weak. Further, as shown in FIG. 11, when a semicircular groove 103 is formed on the outer circumference of the roller 102, the bellows product 2 contacts below the groove 103 on one roller 102 and the bellows product 2 on the other roller 102. 2 comes into contact with the upper side, and the posture of the bellows product 2 is inclined as a whole. However, when the V-shaped groove 11 is formed as shown in FIGS. 7 and 8, the center of the bottom of the V-shaped groove 11 and the apex of the peak portion of the bellows product 2 are always held by the same, so that the holding force is reduced. It is large and the posture of the bellows product 2 does not tilt. As a result, the outer peripheral chevron of the bellows product 2 is automatically moved to the apex of the V-shaped groove 11 along the V-shaped groove 11 of the rollers 6 and 7, and the center axis of the bellows product 2 is aligned with the normal straight line. Adjusted to the desired position.

The first and second outer diameter displacement amount detecting means 3 a, 3 b include roller-shaped contactors 12, 13 that come into contact with the outer peripheral surface of the crest portion of the bellows product 2, and the contactors 12, 13. A guide member 33 that slidably supports the shaft 32 rotatably attached to the tip end in the radial direction of the bellows, and the amount of radial displacement of the bellows product 2 that is brought into contact with the rear ends of the shafts 32 of the contacts 12 and 13. Is composed of linear gauges 14 and 15 for converting and outputting the electric signal. The linear gauges 14 and 15 measure extremely minute displacements with high accuracy, and in the case of the present embodiment, they are for detecting minute fluctuations in the outer diameter dimension measured in advance by the linear scale 20.

Further, as shown in FIGS. 1 and 3, the movable holding rollers 7, 7 and the second outer diameter displacement amount detecting means 3b are still mounted on the XY table 9, and the chucking table 17 is further provided. The bellows product 2 is provided so as to be movable in the X-axis direction, which is separated from and close to the outer peripheral surface of the product. The chucking table 17 is supported by a guide 16 so as to be movable in the X-axis direction, and its movement is driven by an X-axis direction air cylinder 18.

The chucking table 17, the guide 16 and the X-axis air cylinder 18 constitute moving means for moving the second outer diameter displacement amount detecting means 3 b in a direction in which the second outer diameter displacement amount detecting means 3 b is brought into contact with and separated from the bellows product 2. Further, the chucking table 17 is provided with a movement amount measuring means for measuring a distance between the first and second outer diameter displacement amount detecting means 3a, 3b, that is, an approximate outer diameter dimension of the chucked bellows product 2. Has been.

For example, as shown in FIGS. 2 and 5, a scale base 19 extending along the moving direction of the chucking table 17 is provided, and the scale base 19 detects movement of the chucking table 17 for detecting the amount of movement. An X-axis linear scale 20 is provided as a means.

As shown in FIG. 1, FIG. 4 and FIG. 9, the inner diameter displacement amount detecting means 4 supports the contact 21 that contacts the inner peripheral surface of the peak portion of the bellows product 2 and the bellows that supports the contact 21. A third linear gauge that detects the displacement of the support arm 23 that guides so as to be movable only in the radial direction and the displacement of the support arm 23 that moves with the movement of the contactor 21 in the bellows product radial direction and converts it into an electrical signal. 24, contact pressure adjusting means 29 for constantly urging the contactor 21 against the inner peripheral surface of the bellows product 2, and a set cylinder 28 for pushing the support arm 23 away from the inner peripheral surface of the bellows product 2. And an elevating table 25 for supporting them and an elevating mechanism for vertically moving the elevating table 25. The elevating mechanism includes an elevating cylinder 26, a column 27 that supports the elevating cylinder 26, a slide unit 30 that supports the elevating table 25 and that moves linearly according to the elevating operation of the elevating cylinder 26, the slide unit 30, and the slide unit 30. The column 31 for supporting the pushing cylinder 28 is provided. The lift table 25 is provided with a support arm 23, a cover 34 for covering a third linear gauge, and the like. An optical sensor 35, which detects the position of the support arm 23 and controls the operation of the lifting cylinder 26, is attached to the cover 34, and the front end of the support arm 23, that is, the contact 21 is located on the inner peripheral surface of the bellows product 2. The lifting cylinder 26 is operated after confirming that it is located at a sufficiently distant position, for example, at the center. This prevents the contact 21 from moving up and down while touching the inner peripheral surface of the bellows product 2 and damaging the product.

In the case of the present embodiment, the contactor 21 includes a support means for supporting the contactor 21 such that the contactor 21 is slidable downward by its own weight, for example, a linear bearing 22, and a stopper 21 a for restricting the lowered position of the contactor 21. It is attached to the support arm 23 via. That is, it is attached to the support arm 23 so that it can freely move only in the vertical direction when receiving an external force. When the position of the contact 21 is fixed at a position corresponding to the apex h of the outer peripheral surface of the mountain portion, the apex k of the inner peripheral surface is eccentric to the apex h of the outer peripheral surface of the mountain portion as shown in FIG. In this case, the wall thickness dimension t indicated in the drawing is no longer measured. In particular, in blow-molded steering boots and the like, the position of the apex k on the inner peripheral surface side fluctuates in the axial direction even within the same mountain portion, and it is necessary to align it. Therefore, the contact 21 can be lifted upward by the component force generated on the slope of the mountain portion of the inner surface of the bellows product 2, and the vertex k is automatically centered.

In the present embodiment, the displacement amounts detected by the linear gauges 14, 15, 24 of the first and second outer diameter displacement amount detecting means 3a, 3b and the inner diameter displacement amount detecting means 4 are calculated as follows. Measure the wall thickness of the bellows product 2 and the outer diameter of the bellows product 2 using an arithmetic processing unit such as a computer, and display them in numerical values or graphs to determine whether they are within or outside the allowable range. However, the present invention is not limited to this, and the output of each gauge may be directly indicated by the amount of displacement to be calculated or determined by the operator.

With the above configuration, the outer diameter dimension and wall thickness dimension of the crest portion of the bellows product 2 are automatically measured and the inner diameter dimension is obtained by calculation as follows.

First, the bellows product 2 is set vertically between the stationary holding rollers 6 and 6 and the movable holding rollers 7 and 7. At this time, the chucking table 17 on which the movable holding rollers 7, 7 and the like are mounted is retracted to the retracted position, and the setting cylinder 28 is operated to cause the support arm 23 to project to the front end and the contactor of the inner diameter displacement amount detecting means. 21 is raised to the rising end. After setting the bellows product 2 at a predetermined position, operate the X-axis air cylinder 18 by a switch operation or the like to move the chucking table 17 in the X-axis direction, and measure the movable holding rollers 7 and 7 for the bellows product 2. Make contact with the outer peripheral surface of the mountain to be formed. As a result, the bellows product 2 is sandwiched between the stationary holding rollers 6 and 6 and the movable holding rollers 7 and 7. The linear scale 20 measures the approximate outer diameter of the bellows product 2 from the amount of movement of the chucking table 17 at this time, and stores this in the arithmetic processing unit.

Next, the elevating cylinder 26 is operated to gently lower the entire elevating table 25, and the contactor 21 at the tip of the supporting arm 23 is inserted into the bellows product 2.

Subsequently, when the setting cylinder 28 is contracted and retracted, the contact 21 comes into contact with the inner peripheral surface of the peak portion of the bellows product 2 to be measured by the urging force of the contact pressure adjusting means 29. At this time, the contact 21 is stopped by the stopper 21a slightly below the peak h of the bellows product 2 due to its own weight, so that the bellows receives the urging force of the contact pressure adjusting means 29 applied to the contact 21. It is pressed against the slope 2a on the inner peripheral surface of the product 2 and pits under its own weight to slide up the slope 2a. Then, the contact 21 is automatically stopped at the place where the force for pushing up the contact 21 becomes the smallest or the place where the force becomes 0, that is, the apex k of the inner peripheral surface of the mountain portion (see FIG. 9). In bellows products, especially in flexible boots obtained by blow molding, the peak k on the inner peripheral surface side of the crest portion is often not on the same plane perpendicular to the outer peripheral surface side, so on the plane perpendicular to the same axis. If we try to find the vertex k, it will be intermittent. However, the contactor 21 of this embodiment has an inner peripheral surface of a mountain portion to be automatically measured by the balance between its own weight and the upward component force on the slope 2a due to the urging force of the contact pressure adjusting means 29. Since the apex k on the side is centered, the inner diameter displacement amount at the apex k can be continuously detected.

Next, the stationary holding rollers 6 and 6 are driven and rotated to rotate the bellows product 2. The contactor 21 sliding along the inner peripheral surface of the bellows product 2 and the contactors 12, 13 of the first and second outer diameter displacement amount detecting means 3a, 3b displaced along the outer peripheral surface of the bellows product 2. Respectively continuously follow the changes at the measuring points on the outer peripheral surface or the inner peripheral surface of the bellows product 2. Here, even if the shape of the bellows product 2 is, for example, an ellipse due to manufacturing reasons, the pair of movable holding rollers 7, 7 receives the eccentricity and the displacement in the Y-axis direction and slides with an extremely weak force. The contact 13 is made to follow the outer peripheral surface of the ellipse by moving the XY table 9 in the X-axis direction and the Y-axis direction. As a result, as shown in FIG. 6, even if the bellows product 2 is in an eccentric state (shown by an imaginary line), the contactor 13 that follows this is a line L passing through the center O ′ of the bellows product 2. ′ (Axial plane) and the outer circumference of the bellows product 2 are always located on the two points m ′ and n ′ on the outer circumference where they intersect, so between the two points m and n where the axial plane and the outer circumference of the bellows product 2 constantly meet. The distance, that is, the true outer diameter position can be automatically measured.

Here, the displacement amount of the X-axis linear scale 20 is A, the displacement amount of the first outer diameter displacement amount detecting means 3 a is B, and the displacement amount of the second outer diameter displacement amount detecting means 3 b is C. To do. The output relationships of the displacement amounts A, B, and C are shown in the +-direction in FIG. The electric signals of these displacement amounts A, B and C are input to the computer processing device to calculate and display (numerical value / graph display) the outer diameter Do = A + (B + C) of the bellows product.

Further, the displacement amount when the contact 12 of the first outer diameter displacement amount detecting means 3 a contacts the outer peripheral peak apex h of the bellows product 2 is B. The displacement amount when the contact 21 of the inner diameter displacement amount detecting means 4 contacts the apex k of the inner peripheral surface of the mountain portion to be measured is D. The output relationship of the displacement amounts B and D is shown in the + -direction in FIG. The electric signals of the displacement amounts B and D are input to the computer processing device, and the wall thickness t = B + D of the bellows product is calculated and displayed (numerical value / graph display).

Further, the inner diameter dimension Di is calculated by using the outer diameter dimension Do and the wall thickness dimension t measured as described above. That is, it can be obtained by the inner diameter dimension Di = Do-2t.

As described above, the movement amount A of the chucking table 17 when the pair of stationary holding rollers 6 and 6 and the pair of movable holding rollers 7 and 7 sandwich and hold the bellows product 2 from both sides is roughly shown. Micro-displacement B / C from the linear gauges 14, 15 detected by the X-axis linear scale 20 as the outer diameter dimension and detected at the apexes h of the two facing crests of the bellows product 2 Since the outer diameter of the bellows product 2 is calculated by adding the value, the outer diameter of the bellows product 2 can be automatically measured accurately, the measurement time can be shortened, and the measurement accuracy can be improved. ..

Further, since the movable holding rollers 7, 7 and the contactor 13 follow the outer circumference of the elliptical bellows product 2 on the side of the one outer diameter displacement amount detecting means 3b, the contactors 12, 13 are the bellows product 2 The line L passing through the center O and the outer periphery of the bellows product are automatically aligned so that they are always located at two points, m 1 and n, which are opposite to each other and intersect with the outer circumference of the bellows product, thereby improving the measurement accuracy.

[0035]

[Effect of the device]

 As is apparent from the above description, the device for measuring the outer diameter of a bellows product of the present invention has a holding means for holding and rotating the bellows product and a bellows product supported by the holding means, and the bellows product is sandwiched between them to face each other. The first and second outer diameter displacement amount detecting means for detecting the radial displacement amount of the bellows product in a state where the bellows product is in contact with the apex of the outer peripheral mountain portion at two positions, and one outer diameter displacement amount. Since the detecting means and a part of the holding means are constituted by a moving means that moves the bellows product toward and away from the bellows product in the same direction as the displacement detection direction, it is only necessary to hold and rotate the bellows product by the holding means. The outer diameter dimension of the bellows product can be automatically measured from the variation of the detected displacement amount of the first and second outer diameter displacement amount detecting means, and further, the measurement time can be shortened and the measurement accuracy can be improved. In particular, a moving amount measuring means for measuring the approximate outer diameter dimension of the bellows product in a state of being supported by the holding means is provided based on the moving amount of one movable outer diameter displacement detecting means in the separating / contacting direction. In this case, an accurate outer diameter dimension can be obtained by using the approximate outer diameter dimension of the bellows product obtained from this.

According to the apparatus of the present invention as defined in claim 3, even if the bellows product has an elliptical cross section, the holding means and the outer diameter displacement amount detecting means can follow the elliptical bellows product. Even with the bellows product, the accuracy of outer diameter measurement can be improved.

Further, according to the apparatus of claim 4, since the V-shaped groove is formed on the outer periphery of the holding roller, whether the apex of the chevron on the outer periphery of the bellows product is automatically positioned at the apex of the V-shaped groove. The bellows product is set straight and the accuracy of the outer diameter measurement of the bellows product can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an outer diameter / wall thickness measuring device to which an outer diameter dimension measuring device for a bellows product of the present invention is applied, with a part of the device omitted.

2 is a plan view of the device of FIG. 1. FIG.

FIG. 3 is a front view showing a relationship between first and second outer diameter displacement amount detecting means constituting the outer diameter dimension measuring device.

FIG. 4 is a front view showing a relationship between a first outer diameter displacement amount detecting means and an inner diameter displacement amount detecting means which constitute the inner diameter dimension measuring device.

5 is a plan view of the device of FIG.

FIG. 6 is a principle diagram of an ellipse absorption mechanism.

FIG. 7 is an explanatory diagram showing a shape of a holding roller and a relationship between the roller and a bellows product.

FIG. 8 is an enlarged sectional view showing a relationship between a holding roller and a bellows product.

FIG. 9 is an explanatory diagram showing a relationship between a bellows product and a contact of the inner diameter displacement amount detecting means.

FIG. 10 is an explanatory diagram showing a state where a flat roller holds a bellows product.

FIG. 11 is an explanatory diagram showing a state where a bellows product is supported by a holding roller having an arcuate curved surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holding means 2 Bellows product 3a First outer diameter displacement amount detecting means 3b Second outer diameter displacement amount detecting means 4 Inner diameter displacement amount detecting means 6 Stationary holding roller constituting holding means 7 Movable holding roller constituting holding means 9 XY table 11 V-shaped groove 17 Chucking table constituting moving means 18 Cylinder for X-axis constituting moving means 20 X-axis linear scale constituting moving amount detecting means

Claims (4)

[Scope of utility model registration request] 1. A holding means for holding and rotating a bellows product and a bellows product supported by the holding means are sandwiched in between to contact the apex of a mountain portion on the outer periphery of the bellows product at two positions opposed to each other. The first and second outer diameter displacement amount detecting means for detecting the radial displacement amount of the bellows product in the state, and one outer diameter displacement amount detecting means and a part of the holding means are the same as the displacement amount detecting direction. An outer diameter measuring device for a bellows product, which comprises a moving means for moving the bellows product in and out of the direction. 2. A movement amount measuring means for measuring an approximate outer diameter dimension of a bellows product in a state of being supported by the holding means, based on a movement amount of the movable one outer diameter displacement amount detecting means in a separating / contacting direction. The method according to claim 1, further comprising:
Outside diameter measuring device for the bellows product described. 3. The holding means is composed of two sets of rollers arranged substantially symmetrically about a bellows product, and the rollers are evenly arranged on the left and right sides of the first and second outer diameter displacement amount detecting means. And at least one of the rollers and the contactor of any one of the outer diameter displacement amount detecting means are arranged together on a table which can be swung in the axial plane direction of the bellows product and in a direction orthogonal thereto. The outer diameter measuring device for a bellows product according to claim 1 or 2, wherein the contact of the outer diameter displacement amount detecting means is made to follow the movement of the outer peripheral surface of the bellows product in a horizontal plane. 4. The holding means for the bellows product comprises a plurality of holding rollers for sandwiching the ridges of the bellows product, and a V-shaped groove is formed on the surface of the holding roller which comes into contact with the bellows product. An outer diameter measuring device for a bellows product according to any one of claims 1 to 3, wherein the center lines passing through the bottoms of the bellows are on the same plane.