JPH0569617U - Means for measuring the amount of displacement at two points where the axial plane and the outer peripheral surface of the non-round contour shape object and the outer diameter measuring device for the bellows product using the same - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To ensure that the displacement can be measured reliably at two points where the axial plane and the outer peripheral surface of a non-round contour object intersect. [Structure] The first and second outer parts for arranging the contacts 12, 13 at two points m, n where the axial plane and the outer peripheral surface of the non-circular contour shape object 2 intersect and measuring the amount of displacement at these two points. A radial displacement amount detecting means, a holding means composed of two sets of rollers 6 and 7 installed evenly on the left and right sides of the first and second outer diameter displacement amount detecting means, and a non-perfect circular contour-shaped object 2. And a rotating member for rotating any one of the outer diameter displacement amount detecting means, for example, the contactor 13 and a pair of rollers 7, 7 are arranged together on a table movable in the displacement detecting directions X, Y. Then, the contact 13 is caused to follow the movement of the non-round contour shape object 2, and is displaced to two points m ′ and n ′ on the outer circumference where the axial plane and the outer circumferential surface of the non-round contour shape object after movement intersect. When this mechanism is used for an outside diameter measuring device by positioning the quantity detecting means, the true outside diameter position is constantly measured. To be measured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a means for measuring a displacement amount at two points where an axial plane and an outer peripheral surface of a non-perfect circular contour shape object and an outer diameter measuring device for utilizing the means for measuring the outer diameter dimension of a bellows product. More specifically, the present invention provides a non-circular contour-shaped object such as a steering boot and a boot for a constant velocity joint (CVJ boot), which is represented by a flexible boot, such as an outer diameter dimension of a bellows product, particularly an outer diameter dimension of a mountain portion. Relates to a device for measuring.

[0002]

[Prior Art]

 In the case of bellows products, especially bellows products 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. .. Therefore, it is necessary to measure and inspect the dimensions of bellows products regularly, preferably for all products.

Conventionally, the outer diameter of such 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 a displacement amount measuring device capable of accurately measuring the outer diameter of an object to be measured having an elliptical cross section, such as a bellows product. Another object of the present invention is to provide an outer diameter measuring device capable of automatically measuring the outer diameter of a non-round contoured product such as 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.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, the means for measuring the amount of displacement at two points where the axial plane and the outer peripheral surface of the non-circular contour shape object of the present invention are arranged is such that a contactor is arranged at the two measurement points. A first and a second outer diameter displacement amount detecting means, a holding means composed of two sets of rollers evenly installed on the left and right sides of the first and second outer diameter displacement amount detecting means, and the holding means. And a pair of rollers arranged around the contactor of one of the outer diameter displacement amount detecting means and a rotating means for rotating the supported non-perfect circular contour shape object. And the contactor of one outer diameter displacement amount detecting means is made to follow the fluctuation in the horizontal plane of the outer peripheral surface of the non-round contour shape object. ing.

Further, in the outer diameter dimension measuring device for a bellows product using the above displacement amount detecting means, the contactor is arranged at two measuring points where the axial plane and the outer peripheral surface of the bellows product intersect. A second outer diameter displacement amount detecting means and a holding means composed of at least two sets of rollers which are evenly installed on the left and right sides of the first and second outer diameter displacement amount detecting means and hold the bellows product. A rotating means for rotating the bellows product supported by the holding means, and a roller of one set of the outer diameter displacement amount detecting means and one of the holding means in the same direction as the displacement detecting direction. The outer diameter of the bellows product supported by the holding means is measured based on the moving amount of the one outer diameter displacement amount detecting means that is movable and the moving means in the separating and contacting direction. Moving amount measurement hand The contactor of the one outer diameter displacement amount detecting means, which is provided with a step and is movable, and the pair of rollers arranged around the contactor are swingable in a displacement detection direction and a direction orthogonal to the displacement detection direction. Are arranged together on a table, and the contact of the one outer diameter displacement amount detecting means is made to follow the fluctuation in the horizontal plane of the outer peripheral surface of the non-perfect circular contour shape object.

Here, it is preferable that a V-shaped groove is formed on the surface of the roller of the holding means that contacts the crest portion of the bellows product, and the center lines passing through the bottoms of these grooves are on the same plane. Yes.

[0010]

[Action]

 Therefore, when an eccentric motion (state indicated by a virtual line) occurs because the DUT is not a perfect circle but an elliptical shape, the outside diameter displacement of the DUT, which is a non-perfect circular contour, is shown in Fig. 1. As shown in the figure, not only in the X direction but also in the Y direction, the roller holding the non-round contour shape object follows the movement of the table together with the table, and the contact of one displacement amount detecting means is set to the non-round contour object. Move while touching the outer diameter of. As a result, as shown in FIG. 1, even if the non-round contour shape object is in an eccentric state (shown by a virtual line), the contactor that follows the eccentricity is positioned at the center O'of the non-round contour object. Since it is located on two points m'and n'on the outer circumference where the line L '(axial plane) that passes and the outer circumference of the non-round circular shape object are located, the axis plane and the outer peripheral surface of the non-round shape object are constantly The distance between the two points m and n where and intersect, that is, the true outer diameter position is automatically measured.

Further, in the case of the bellows product outer diameter dimension measuring device using the displacement amount measuring means, between the holding means and the first and second outer diameter displacement amount detecting means which face each other by the driving of the moving means. When the bellows product set in is held, the approximate outer diameter dimension of the bellows product supported between them is measured from the moving amount of the moving means. Then, the bellows product held by the holding means is sandwiched in between, and the first and second outer diameter displacement amount detecting means are brought into contact with the outer peripheral surface of the mountain portion of the bellows product to be measured. When the product is rotated, 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, 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. Moreover, since the contact of one outer diameter displacement amount detection means follows the movement of the rotating bellows product in the horizontal plane, the other outer diameter displacement amount detection means is connected to the center of the bellows product on the other side. The radial displacement detecting means always moves to measure the radial displacement of the bellows product at two points where the axial plane and the outer peripheral surface intersect.

Further, according to the third aspect of the invention, when the ridge of the bellows product is caught in the V-shaped groove on the outer peripheral surface of the roller of the holding means, its top is guided to the center of the bottom of the V-shaped groove. The bellows product is set straight because it rubs.

[0013]

【Example】

 Hereinafter, the configuration of the present invention will be described 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 in which the present invention is applied to a size measuring device for bellows products. This device comprises a holding means 1 for rotatably holding a bellows product 2 which is a non-perfect circular contour shape whose cross-sectional contour shape is not necessarily a perfect circle, and a shaft of the bellows product 2 supported by the holding means 1. Two points that detect the displacement in the radial direction of the bellows product 2 are in contact with the peaks of the ridges on the outer peripheral surface of the bellows product 2 at two points where the plane and the outer peripheral surface intersect (positions indicated by symbols m and n in FIG. 1). First and second displacement amount detecting means (hereinafter, referred to as first and second outer diameter displacement amount detecting means) 3a and 3b for measuring the outer diameter dimension, and either one of the outer diameter displacement amount detecting means, for example, The third displacement for wall thickness measurement, which is arranged so as to face the first outer diameter displacement amount detecting means 3a and detects the displacement amount in the radial direction of the bellows product 2 while being in contact with the inner peripheral surface of the bellows product 2. Quantity detecting means (hereinafter referred to as inner diameter displacement amount detecting means) 4Further, 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, for example, the first and second The two sets of rollers 6, 6 and 7, which are holding means, are mounted on a table (hereinafter referred to as a chucking table) 17 that can move in the same direction as the displacement directions of the outer diameter displacement amount detecting means 3a, 3b. 7 and the distance between the first outer diameter displacement detecting means 3a and the second outer diameter displacement amount detecting means 3b can be changed, so that the bellows product 2 can 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 further the second outer diameter displacement detecting means 3b is, for example, an X-axis linear scale. 20 and.

As shown in FIG. 2 and FIG. 3, 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 elliptical shape instead of a perfect circle and causes an eccentric movement (state indicated by a virtual line), the outer diameter displacement of the bellows product 2 is limited to the X direction only 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 is prevented from being tilted by being displaced from the vertical line (correct set position). 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 connect the 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 with each other. 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. 2 and 4, 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. 3 and 6, 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 to detect the amount of movement of the chucking table 17. An X-axis linear scale 20 is provided as a means.

As shown in FIG. 2, FIG. 5, 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, such as a linear bearing 22, for supporting the contactor 21 so as to be slidable downward by its own weight, 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 3 a, 3 b 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-described structure, the outer diameter dimension and wall thickness dimension of the peak portion of the bellows product 2 are automatically measured and the inner diameter dimension is calculated by the following method.

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 axis h as the vertex h of the outer peripheral surface. When trying to find the vertex k, it becomes intermittent. However, the contactor 21 of the present embodiment has the inner peripheral surface side of the 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 vertex k is centered, the inner diameter displacement amount at the vertex 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. 1, 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 located on two points m ′ and n ′ on the outer circumference, so that between the two points m and n where the axial plane and the outer peripheral surface of the bellows product 2 constantly intersect. 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 contactor 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 defined as 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 one outer diameter displacement amount detecting means 3b side, 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.

[0034]

[Effect of the device]

 As is apparent from the above description, the present invention is a means for measuring the amount of displacement at two points where the axial plane and the outer circumferential surface of a non-true circular contour shape object intersect, and a contactor is provided at the two measurement points. First and second outer diameter displacement amount detecting means arranged, and holding means composed of two sets of rollers evenly installed on the left and right sides of the first and second outer diameter displacement amount detecting means, respectively. A rotating means for rotating the non-circular contour shaped object supported by a holding means, and a contact of one of the outer diameter displacement amount detecting means, and a pair of contacts arranged around the contact. The rollers are arranged together on a table movable in a displacement detection direction and a direction orthogonal to the displacement detection direction, and the contactor of the one outer diameter displacement amount detecting means is placed in the horizontal plane of the outer peripheral surface of the non-perfect circular contour shape object. Since it is made to follow the fluctuation, it is not a perfect circle. Even if the contour-shaped object oscillates in the horizontal plane, the contact that follows this moves it to two points on the outer periphery where the axial plane and outer peripheral surface of the non-round contour-shaped object after movement intersect. It is possible to automatically measure the true outer diameter position by arranging the displacement amount detecting means on the side.

Further, in the outer diameter dimension measuring device for a bellows product using this displacement amount measuring means, a holding means for holding and rotating the bellows product and a bellows product supported by the holding means are provided between the holding means. Holding the diametrical displacement of the bellows product in a state where the bellows product is in contact with the apex of the ridge on the outer periphery of the bellows product at two positions opposed to each other by the driving of the first and second moving means. When the bellows product is clamped and rotated between the means and the first and second outer diameter displacement detection means, the approximate outer diameter dimension of the bellows product is measured from the movement amount of the moving means, and Also, since the second outer diameter displacement amount detecting means detects a minute 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, the outer diameter of the bellows product is automatically detected. of The size can be measured accurately and the measurement time can be shortened. In particular, when a V-shaped groove is formed on the outer periphery of the holding roller, the peak of the chevron on the outer periphery of the bellows product is automatically located at the apex of the V-shaped groove, so the bellows product is set straight and the bellows product The outer diameter measurement accuracy of can be improved.

In particular, when a V-shaped groove is provided on the outer peripheral surface of the roller of the holding means of the device of the present invention, the top of the bellows product is guided to the center of the bottom of the V-shaped groove when the peak is pinched. As a result, the bellows product is set straight and the measurement accuracy increases.

[Brief description of drawings]

FIG. 1 is a principle view of a displacement measuring means of the present invention for measuring a displacement amount at two points where an axial plane and an outer peripheral surface of a non-perfect circular contour shape object intersect.

FIG. 2 is a front view showing an embodiment of an outer diameter / wall thickness measuring device in which the present invention is applied to a bellows product outer diameter dimension measuring device, with a part of the device omitted.

3 is a plan view of the device of FIG.

FIG. 4 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. 5 is a front view showing a relationship between a first outer diameter displacement amount detecting means and an inner diameter displacement amount detecting means constituting the inner diameter dimension measuring device.

6 is a plan view of the device of FIG.

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 which is a non-round contour object 3a 1st outer diameter displacement amount detecting means 3b 2nd outer diameter displacement amount detecting means 6 Stationary holding roller 7 which constitutes holding means 7 Movable holding which constitutes holding means Roller 9 XY table 11 V-shaped groove 17 Chucking table constituting moving means 18 X-axis cylinder constituting moving means 20 X-axis linear scale constituting moving amount detecting means

Claims (3)

[Scope of utility model registration request] 1. A means for measuring a displacement amount at two points where an axial plane and an outer peripheral surface of a non-perfect circular contour object intersect, wherein first and second contact points are arranged at the two measurement points. Outer diameter displacement amount detecting means, holding means composed of two sets of rollers evenly installed on the left and right sides of the first and second outer diameter displacement amount detecting means, and the non-true member supported by the holding means. And a pair of the rollers arranged around the contactor of one of the outer diameter displacement amount detecting means and a rotating means for rotating the circular contour-shaped object, and the contactor being orthogonal thereto. A displacement amount which is arranged together on a table movable in any direction, and which causes the contactor of the one outer diameter displacement amount detecting means to follow the variation in the horizontal plane of the outer peripheral surface of the non-round contour object. Detection means. 2. A first and second outer diameter displacement amount detecting means in which contacts are arranged at two measuring points where the axial plane and the outer peripheral surface of the bellows product intersect, and the first and second outer portions. Holding means consisting of at least two sets of rollers, which are installed evenly on the left and right sides of the radial displacement amount detecting means and hold the bellows product, rotating means for rotating the bellows product supported by the holding means, and the outer diameter. Moving means for bringing one of the pair of rollers of the displacement amount detecting means and the holding means into contact with and separating from the bellows product in the same direction as the displacement amount detecting direction;
A moving amount measuring means for measuring a rough outer diameter dimension of the bellows product in a state of being supported by the holding means from a moving amount in the detaching and contacting direction of the one outer diameter displacement amount detecting means which is movable, and The movable contactor of the one outer diameter displacement amount detecting means and a pair of the rollers arranged around the contactor are arranged together on a table swingable in a displacement detection direction and a direction orthogonal thereto. An outer diameter measuring device for a bellows product, characterized in that a contact of the one outer diameter displacement amount detecting means is made to follow a variation in a horizontal plane of an outer peripheral surface of the non-round shape object. 3. A V-shaped groove is formed on a surface of the roller of the holding means that is in contact with the crest portion of the bellows product, and center lines passing through the bottoms of the grooves are on the same plane. The outer diameter dimension measuring device for a bellows product according to claim 2.