JPH0649922U - Thickness gauge - Google Patents

Abstract

(57) [Summary] [Purpose] To enable accurate thickness measurement of curved test pieces with a simple structure. [Structure] In a thickness gauge for measuring the thickness of a test piece TP by detecting the distance between the upper and lower measuring indenters 25, 27, the lower measuring indenter 25 and a pair of test piece receivers 7 are integrally measured in the upper portion. An elevating mechanism for moving up and down relatively to the indenter 27, and an elastic body 11 provided on the pair of test piece receivers 7 for holding the test piece TP and bending according to the pressing force applied to the test piece TP. It is equipped with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thickness gauge in which a test piece is sandwiched by an upper and lower measuring indenter to measure its thickness.

[0002]

[Prior art]

 A thickness gauge is known that measures the thickness of a test piece by sandwiching the test piece placed and supported by a pair of test piece receivers with the upper and lower measuring indenters and detecting the interval between the upper and lower measuring indenters. ing . In this type of thickness measurement, generally, the thickness of the test piece is measured at a total of three points, that is, at the center and both ends. It can be moved in any direction. In addition, the applicant previously held the lower measuring indenter at the same height as the pair of right and left receivers, and simultaneously raised and lowers the lower measuring indenter and the pair of receivers to perform a test on the upper and lower measuring indenters. A test piece support device was proposed in which the piece was sandwiched (Practical application No. 4-7344, detailed description). According to this, since the test piece is supported at three points by the lower measuring indenter and the pair of receivers, the test piece does not float up from the receiver or lose its balance and tilt when measuring the thickness. The occurrence of measurement error can be avoided.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional test piece supporting device, when the test piece TP is curved as shown in FIG. 5, for example, when the both end portions of the test piece are supported by the receiving tool, the lower measuring indenter is pressed. Does not contact the test piece. For this reason, when the lower measuring indenter is raised together with the pair of receivers and the test piece TP is sandwiched between the upper and lower measuring indenters, the reaction force of the test piece TP acts on the upper and lower measuring indenters to obtain accurate measurement results. Can't get Depending on the warp and material of the test piece, it may not be possible to insert the test piece with the upper and lower measuring indenters.

An object of the present invention is to provide a thickness gauge that can obtain accurate measurement results even with a curved test piece with a simple structure.

[0005]

[Means for Solving the Problems]

 The present invention provides a pair of test piece receivers on which both ends of a test piece are placed and supported, and between the pair of receivers, the test piece receivers are movable in the longitudinal direction of the test piece relative to each other, and the test piece receivers are vertically movable. It is applied to a thickness gauge that is equipped with a vertical measuring indenter that inserts a test piece from the bottom and measures the thickness of the test piece by detecting the interval between these upper and lower measuring indenters. Then, an elevating mechanism that integrally raises and lowers the lower measuring indenter and the pair of receiving members relative to the upper measuring indenter, and the pair of receiving members is provided to hold the test piece. An elastic body that flexes according to the pressing force applied to the test piece is provided, and the above problems are solved by this.

[0006]

[Action]

 The test piece is placed on the top of the elastic body provided on the pair of receivers, and the lower measuring indenter and the pair of receivers are lifted relative to the upper measuring indenter by the elevating mechanism. At this time, for example, when the test piece is curved as shown in FIG. 5, the upper measuring indenter first contacts the upper surface of the test piece and presses the test piece downward. Due to this pressing force, the elastic body bends and the test piece descends with respect to the receiver, and the lower surface of the test piece contacts the lower measuring indenter. That is, the test piece can be accurately pinched by the upper and lower measuring indenters.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. 1 to 3 are a front view, a plan view and a right side view of a thickness gauge according to the present invention, respectively. A pair of left and right U-shaped brackets 2 having upper and lower support portions 2a and 2b are screwed to a base 1 shown in FIG. 3, and linear bearings 3 are fixed to the lower surface of the upper support portion 2a of the bracket 2, respectively. There is. A guide shaft 4 is slidably passed through each of the linear bearings 3 in the vertical direction, and both ends of a support rod 5 are fixed to the lower end of each guide shaft 4.

A linear bearing 6 is slidably passed to the left and right in the center of the support rod 5, and a pair of U-shaped test piece receivers 7 are attached to both ends of the linear bearing 6. . The test strip receiver 7 is formed with an elongated hole 7a in the vertical direction as shown in FIG. 3, while the support rod 5 is fixed with a pair of mounting members 9 penetratingly through the set screw 8. After the elongated hole 7a of the receiving member 7 is inserted into the screw portion 9a of the screw 9, the nut 10 is screwed into the screw portion 9a. As a result, the receiving member 7 is sandwiched between the head of the mounting member 9 and the nut 10 and is prevented from moving in the axial direction with respect to the supporting rod 5, but with respect to the supporting rod 5 corresponding to the length of the elongated hole 7a. It is possible to move up and down. The mounting member 9 can be moved along the support rod 5 by loosening the setscrew 8, whereby the mounting position of the receiving member 7 can be changed appropriately.

A sponge 11 as shown in FIG. 4 is fixed to the upper surface of each test piece receiver 7 by, for example, a double-sided tape, and an enclosure 12 that covers the periphery of the sponge 11 is screwed. The upper part of the sponge 11 has a roof shape and its top is chamfered, and both ends of the test piece TP (TP1 or TP2) are placed and supported on the top of the pair of sponges 11. When a downward pressing force acts on the mounted test piece TP, the sponge 11 bends and the test piece TP descends with respect to the receiver 7.

On the other hand, the linear bearing 6 penetrating the support rod 5 is fixed to the frame 22 via a mounting member 21 (FIG. 2). The frame 22 can be moved in the left-right direction along a horizontal shaft 28 by an actuator for lateral movement (not shown), and can be raised and lowered along a rail 23 by an actuator for raising and lowering (not shown). A bolt shaft 24 (FIG. 1) is erected on the linear bearing 6, and a lower measuring indenter 25 is screwed on the tip thereof. As shown in FIG. 1, when the support rod 5 is located at the uppermost part of the elongated hole 7 a of the receiver 7, the upper surface of the lower measuring indenter 25 is flush with the top surface of the sponge 11.

Here, when the frame 22 is moved in the left-right direction, the linear bearing 6 slides on the support rod 5, whereby the lower measuring indenter 25 moves integrally in the left-right direction. When the frame 22 moves up and down, the lower measuring indenter 25 moves up and down together via the linear bearing 6, and at this time, the test piece receiver 7 also integrally moves up via the support rod 5. Denoted at 26 are stoppers respectively fixed to the lower support portions 2b of the pair of brackets 2 and regulate the lowering position of the test piece receiver 7.

Reference numeral 27 in FIG. 1 denotes an upper measuring indenter which is arranged coaxially and oppositely to the lower measuring indenter 25. The upper measuring indenter 27 is mounted on the lower measuring indenter 25 by the above-mentioned lifting actuator. It descends in synchronization with the rise, and rises in synchronization with the lowering of the lower measuring indenter 25. Then, when the test piece TP placed on the sponge 11 is sandwiched between the upper and lower measuring indenters 25, 27, the distance between the two indenters 25, 27 is set by a detector (not shown) (for example, a magnetic scale). The thickness of the test piece TP is detected and measured. The upper measuring indenter 27 moves in the left-right direction integrally with the lower measuring indenter 25.

Next, the operation of the embodiment will be described with reference to FIG. When measuring the thickness of the test piece TP, the upper and lower measuring indenters 25 and 27 are positioned at the center of the support bar 5, and the lower measuring indenter 25 is lowered to the lowermost end. At this time, the lower surfaces of the pair of test piece receivers 7 are in contact with the stoppers 26, and the support rod 5 is located at the lowermost end of the elongated hole 7a of the receiver 7. Therefore, the upper surface of the lower measuring indenter 25 is lower than the top surface of the sponge 11.

Both ends of the test piece TP are placed on a pair of sponges 11 fixed to the test piece receiver 7, and the frame 22 is lifted by a lift actuator (not shown). As a result, the lower measuring indenter 25 is integrally raised via the mounting member 21 and the linear bearing 6, and the upper measuring indenter 27 is lowered. Further, the support rod 5 also rises as the linear bearing 6 rises. The lift of the support rod 5 is guided by the guide shaft 4 that slides in the linear bear ring 3. At this time, the support rod 5 rises in the elongated hole 7a of the receiver 7, and when the mounting member 9 abuts on the upper end of the elongated hole 7a as shown in FIG. The receiver 7 also rises together, and the test piece TP placed on the sponge 11 also rises.

Here, when the mounting member 9 comes into contact with the upper ends of the elongated holes 7 a, the upper surface of the lower measuring indenter 25 is flush with the top surfaces of the pair of sponges 11. Therefore, in the case of the test piece TP which is not curved as shown in FIG. 1, the lower measuring indenter 25 contacts the lower surface of the test piece TP 1, and thereafter, the lower measuring indenter 25 and the pair of sponges 11 are used. The test piece TP will be supported and raised at three points. When the test piece TP rises by a predetermined amount, the test piece TP is sandwiched by the upper and lower measuring indenters 25 and 27, and in this state, the interval between the both indenters 25 and 27 is detected by a detector (not shown) to detect the test piece TP. The thickness is measured.

On the other hand, when the test piece TP is curved as shown in FIG. 5A, even if the lower measuring indenter 25 is elevated to the same height as the sponge 11, the lower measuring indenter 25 is The test piece TP does not come into contact with T P and rises while supporting at two points. When the test piece TP is raised by a predetermined amount, the upper measuring indenter 27 comes into contact with the upper surface of the test piece TP and presses it downward, and the pressing force causes the sponge 11 to bend as shown in FIG. It descends with respect to the receiver 7. As a result, even if the test piece TP is curved, its lower surface abuts the lower measuring indenter 25, and the test piece TP is sandwiched by the upper and lower measuring indenters 25, 27. The thickness of the test piece TP can be measured by detecting the interval of. At this time, there is no effect of correcting the warp of the test piece TP, and neither undesired load acts on the indenters 25 and 27.

When the measurement of the thickness of the center of the test piece is completed by the above procedure, the frame 22, that is, the upper and lower measuring indenters 25 and 27 are sequentially moved to the positions indicated by PL and PR in FIG. 2 by a lateral actuator (not shown). Move and measure the thickness of both ends of the test piece in the same way as above at each position. As shown in FIG. 6, when the test piece TP is thick and heavy, the sponge 11 bends when the test piece TP 1 is placed on the sponge 11, and the test piece TP is supported by the enclosure 12 of the sponge 11. Then, the thickness is measured in this state.

In the configuration of the above embodiment, the linear bearing 6, the support rod 5, the guide shaft 4, and the linear bearing 3 constitute an elevating mechanism, and the sponge 11 constitutes an elastic body.

Although an example in which the sponge 11 is used as the elastic body has been described above, an elastic body as shown in FIG. 7, for example, may be attached to a pair of test piece receivers and used. This is a coil spring 51 having one end fixed to the upper surface of the test piece receiver, and a plate member 52 bent in a roof shape attached to the other end. The test piece is placed on the top of the plate member 52. R. The elastic body may be made of rubber.

In the above description, the shape in which both ends of the test piece are warped downward has been described. However, even in the case of a test piece that is warped upward, the elastic body such as the sponge 11 is bent to place the test piece between the upper and lower indenters. By sandwiching it, accurate thickness measurement becomes possible. Also, an example in which the lower measuring indenter 25 is moved in the longitudinal direction of the test piece between the pair of receiving tools 7 is shown, but the lower measuring indenter 25 is fixed and the pair of receiving tools 7 on which the test piece TP is placed. May be moved in the longitudinal direction of the test piece to change the thickness measurement position of the test piece TP. Furthermore, the upper measuring indenter 27 is lowered in synchronization with the rise of the lower measuring indenter 25, but the upper measuring indenter 27 is fixed and only the lower measuring indenter 25 is raised, or vice versa. It is also possible to fix the lower measuring indenter 25 and to lower only the upper measuring indenter. Further, the configurations of the test piece receiver and the lifting mechanism are not limited to those in the embodiment.

[0021]

[Effect of device]

 According to the present invention, the elastic member whose top is flush with the upper surface of the lower measuring indenter is provided on the test piece receiver, and the elastic body is flexed in response to the downward pressing force applied to the test piece supported on the top. Since it is configured so that even a curved test piece with a simple structure can be sandwiched by the upper and lower measuring indenters to measure the thickness, an accurate measurement result can be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a thickness gauge according to the present invention.

FIG. 2 is a plan view of the thickness gauge.

FIG. 3 is a right side view of the thickness gauge.

FIG. 4 is a perspective view showing a sponge attached to a receiving tool and its enclosure.

FIG. 5 is a diagram for explaining the operation when measuring the thickness of a curved test piece.

FIG. 6 is a diagram for explaining the operation when measuring the thickness of a heavy test piece.

FIG. 7 is a perspective view showing a modified example of an elastic body.

[Explanation of symbols]

 2 U-shaped bracket 3, 6 Linear bearing 4 Guide shaft 5 Support rod 7 Test piece receiver 11 Sponge 12 Enclosure 22 Frame 25 Lower measuring indenter 26 Stopper 27 Upper measuring indenter TP Test piece

Claims (1)

[Scope of utility model registration request] 1. A pair of test piece receivers on which both ends of a test piece are placed and supported, and between the pair of receivers, relative movement is possible in the longitudinal direction of the test piece with respect to the receiver, In a thickness gauge that includes a vertical measuring indenter for inserting the test piece from the direction, and measures the thickness of the test piece by detecting the interval between these upper and lower measuring indenters, the lower measuring indenter and the pair of An elevating mechanism for integrally elevating and lowering the receiving tool relative to the upper measuring indenter, and the pair of receiving tools, which holds the test piece and responds to the pressing force applied to the test piece. A thickness gauge, comprising: a flexible elastic body.