JPH072908U - Feeder with level adjustment - Google Patents

Abstract

(57) [Summary] [Purpose] The feeder does not move horizontally even if the knob of the variable height foot is turned to adjust the tilt of the feeder.
Moreover, it is an object of the present invention to provide a feeding device at a low cost in which the vertical position of the feeding device does not change during measurement. [Structure] In a feeder of a simple surface roughness profiler and a contour profiler in which a feeder is placed directly on a table, two fixed feet and one height adjustable foot are provided on the lower surface of the feeder. The brake parts are provided on or near the outer circumference of the fixed foot.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a feeder, and more particularly to a feeder suitable for a surface roughness measuring machine and a contour measuring machine, which is a simple measuring machine in which the feeder is placed directly on a table.

[0002]

[Prior art]

 The surface roughness measuring device and the contour shape measuring device detect the change of the work surface by bringing the stylus into contact with the surface of the object to be measured (hereinafter referred to as “work”) and moving the stylus. . FIG. 7 is a diagram showing the configuration of a general simplified surface roughness measuring device, FIG. 8 is a bottom view of the feeding device portion of FIG. 7, and FIG. 9 is a diagram showing the configuration of a general simplified contour shape measuring device.

In FIGS. 7 and 8, a movable arm 16 extends from the feeding device 11 and is movable in the left-right direction in FIG. A mounting rod 17 is fixed to the movable arm 16, and a holder 18 is mounted on the mounting rod 17 so as to be vertically mounted. Further, a detector 19 is fixed to the holder 18, and a stylus 20 is projected from the detector 19. Further, fixed feet 12 and 12 and a variable height foot 13 are provided on the lower surface of the feeding apparatus 11, and the feeding apparatus 11 is supported by three feet and the height of the variable height foot 13 is changed to feed. The inclination of the device 11 can be changed. When the workpiece 21 is measured by the surface roughness measuring device configured as above, the feeder 20 moves the stylus 20 along the measurement surface 21a of the workpiece 21 and the detector 19 detects the amount of change of the stylus 20. . The change in the contact position when the stylus 20 moves along the measurement surface 21a of the work 21 represents the surface roughness. Further, in the contour shape measuring machine in FIG. 9, a detector is built in the feeding device 31, and a stylus 35 is attached to a detection arm 34 protruding from the feeding device 31. The change in the contact position when the stylus 35 moves along the surface of the work 36 represents the contour shape.

In FIGS. 7 and 8, when the measurement surface 21 a of the work 21 is inclined with respect to the upper surface of the table 10, the amount of change of the measurement surface 21 a exceeds the measurement range of the stylus 20 or the work 21 Since the portion other than the measurement surface 21a easily comes into contact with the stylus 20, the inclination of the feeding device 11 is adjusted by the height variable foot 13 so that the feeding device 11 is substantially parallel to the measurement surface 21a of the work 21. Measure later. Further, the feeding device 11 is a reference for measurement, and if the feeding device 11 fluctuates in the vertical direction during measurement, accurate measurement cannot be performed. Therefore, the fixed foot 12 and the variable height foot 13 are made of a material having high rigidity (for example, metal or the like). ) Is used. Further, the tip ends of the fixed foot 12 and the variable height foot 13 are spherical or conical so that the height of the feeding device is stable regardless of the surface condition of the upper surface of the table 10. The structure of the lower surface of the feeding device of the contour shape measuring machine in FIG. 9 is the same as that of the surface roughness measuring machine, and therefore its explanation is omitted.

[0005]

[Problems to be solved by the device]

 However, generally, the coefficient of friction between the surface of the table 10 and a material having high rigidity (for example, metal) is not so large (generally around 0.15). Therefore, when the tilt adjusting knob 13a of the variable height foot 13 is rotated to adjust the tilt of the feeder 11, the force applied to the tilt adjusting knob 13a causes the feeder 11 to move in the horizontal direction and the horizontal position to shift. Will end up. The feeding device 11 serves as a reference for the measurement position of the work 21, and there is a problem that the measurement position of the work 21 shifts when it moves in the horizontal direction and accurate measurement cannot be performed. If the fixed foot 12 is made of an elastic material such as rubber (the coefficient of friction is generally around 0.5) in order to increase the friction coefficient between the table 10 and the fixed foot 12, such a material is generally used. Since the rigidity is low, the vertical position of the feeding device 11 fluctuates during the measurement, which causes a problem that accurate measurement cannot be performed. Since the contour shape measuring machine in FIG. 9 is similar to the surface roughness measuring machine, the description thereof will be omitted.

The present invention has been made in view of the above circumstances, and even if the tilt adjusting knob of the height adjustable foot is rotated to adjust the tilt of the feeder, the feeder does not move in the horizontal direction. The aim is to provide an inexpensive feeder that does not change the vertical position of the feeder during measurement.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a simple surface roughness measuring machine and a contour measuring machine in which a feeding device is placed directly on a table, and two fixing feet are provided on the lower surface of the feeding device. One variable height foot and brake parts were provided near or around the fixed foot.

[0008]

[Action]

 According to the present invention, since two fixed feet, one height adjustable foot, and brake parts are provided near or around the fixed foot on the lower surface of the feeding device, the tilt of the feeding device is adjusted. The feeder does not move in the horizontal direction even when the height adjustment foot tilt adjustment knob is turned, and the vertical position of the feeder does not change during measurement.

[0009]

【Example】

 The necessary conditions for the brake parts are as follows. (B) The coefficient of friction with the table surface is large at the part that contacts the table. (B) Vertical rigidity is lower than that of the fixed feet so that the weight of the feeder always contacts the fixed feet when placed on the table. (C) In order to generate a frictional force on the brake parts, it is necessary to push the table-contacting part against the table, and this force is generated by the weight of the feeder. To be communicated to the contact area. (D) When a force is applied to the tilt adjustment knob, the fixed foot tries to move horizontally, but it should not be deformed horizontally in response to the force.

First Embodiment FIG. 1 is a diagram of a feeding device showing a first embodiment. Since the part from the movable arm is the same as the conventional one, it is omitted. FIG. 2 is a detailed view of the fixed foot portion of FIG. 1. The left side of the center line AA is the state when the feeder is placed on the table, and the right side is the state before the feeder is placed on the table. Shows. The lower surface 11a of the feeding device 11 is provided with two fixed feet 12 and one height adjustable foot 13, both of which are made of a material having high rigidity (for example, metal or ceramics). The tip is spherical. In addition, brake parts 14 are attached to the fixed feet 12, respectively.

The brake component 14 is an elastic material (rubber or the like) having a large coefficient of friction with the table surface and a rigidity lower than that of a metal material, the inside of the lower portion 14a is tapered, and the upper portion 14c is fixed to the fixed foot 12 or. It is fixed to the lower surface 11 a of the feeding device 11. The intermediate portion 14b serves only to support the lower portion 14a, and has a thin wall thickness so as to have a sufficiently low rigidity. Further, the length from the lower surface 11a of the feeding device 11 to the lower end surface of the brake component 14 is longer than the length of the fixed foot 12. As a result, when the feeding device 11 is placed on the table 10, the lower end surface of the brake component 14 first comes into contact with the table due to the weight of the feeding device 11, and then the vicinity of the tip of the fixed foot 12 spreads the inside of the lower portion 14a to fix it. The tip of the foot 12 hits the table 10. At this time, the brake component 14 contracts in the vertical direction, but the contraction is absorbed by the intermediate portion 14b expanding in the horizontal direction. Therefore, the weight of the feeding device 11 is supported by the fixed foot 12, and a force for pushing the table 10 is also generated in the lower portion 14a of the brake component 14, and the weight of the feeding device 11 is applied. A frictional force is generated between 14 and. Since the brake part 14 has a larger coefficient of friction with the table surface than the fixed foot 12, this frictional force is sufficiently larger than in the conventional case where the brake part 14 is not provided. Further, since the lower portion 14a of the brake component 14 is in close contact with the fixed foot 12 in the horizontal direction, the rigidity in the horizontal direction is sufficiently high.

Second Embodiment FIG. 3 is a view of a fixed foot portion of a feeding device showing a second embodiment. The other parts are the same as those in the first embodiment and will not be described. In FIG. 3, the left side of the center line AA shows the state when the feeder is placed on the table, and the right side shows the state before the feeder is placed on the table. In the second embodiment, the brake component 14 is an elastic material (rubber or the like) having a large coefficient of friction with the table surface and a rigidity lower than that of a metal material, and the upper portion 14c is fixed to the fixed foot 12 or the lower surface 11a of the feeding device 11. In addition, the length from the lower surface 11a is longer than the fixed foot 12. Up to this point, the procedure is the same as in the first embodiment. The difference from the first embodiment is that the lower portion 14a has a structure in which it is not vertically restrained from the fixed foot 12, and the rigidity of the brake component 14 in the vertical direction is set by the intermediate portion 14b. That is, the vertical rigidity of the brake component 14 is determined by the thickness and length of the intermediate portion 14b. As a result, when the feeding device 11 is placed on the table, the brake component 14 contracts due to the weight of the feeding device 11 so that the fixed foot 12 hits the table and the braking component 14 also bears the weight of the feeding device 11. Become. The amount of contraction of the brake component 14 in the vertical direction is absorbed by the horizontal expansion of the intermediate portion 14b. Further, since the lower portion 14a of the brake component 14 is in contact with the fixed foot 12 in the horizontal direction, the rigidity in the horizontal direction is sufficiently high.

Third Embodiment FIG. 4 is a view of a fixed foot portion of a feeding device showing a third embodiment. The difference from the second embodiment is that there is no distinction between the lower portion 14a and the intermediate portion 14b of the brake component 14, and the vertical rigidity of the brake component 14 is determined by the length from the lower surface 11a of the feeding device 11 and the outer dimensions of the brake component 14. That is what is being done. That is, when the feeding device 11 is placed on the table, the weight of the feeding device 11 causes the brake component 14 to shrink and the fixed foot 12 to hit the table. However, the amount by which the brake component 14 shrinks causes the lower portion 14a to spread horizontally. Absorb more. Since the other contents are the same as those in the second embodiment, the description thereof will be omitted.

Fourth Embodiment FIG. 5 is a view of the vicinity of a fixed foot of a feeding device showing a fourth embodiment. In the fourth embodiment, the break component 14 is provided in the vicinity of the fixed foot 12 separately from the fixed foot 12. The conditions required for the brake parts are exactly the same as those described in the second embodiment, but in the second embodiment, since the brake parts are provided on the outer periphery of the fixed foot, the horizontal rigidity of the brake part is fixed to the fixed foot. However, in the fourth embodiment, since the brake part is provided in a place different from the fixed foot 12, it is necessary to additionally depend on the rigidity of the brake part in the horizontal direction. In FIG. 5, the brake holder 15 is the component, and the outer side is in contact with the inner side of the brake component 14. Since the other contents are the same as those in the second embodiment, the description thereof will be omitted. In the fourth embodiment, the shape of the brake component is the same as that of the second embodiment, but the shape is not limited to this, and the shape of the third embodiment may be used.

Fifth Embodiment FIG. 6 is a view of the vicinity of a fixed foot of a feeding device showing a fifth embodiment. In the fifth embodiment, the brake holder 15 described in the fourth embodiment is provided outside the brake component 14, and the inside of the brake holder 15 is in contact with the outside of the brake component 14. When the feeding device 11 is placed on the table, the weight of the feeding device 11 causes the brake component 14 to shrink and the fixed foot 12 hits the table, but the amount by which the brake component 14 shrinks is absorbed by the intermediate portion 14b shrinking inward. Since the other contents are the same as those in the fourth embodiment, the description thereof will be omitted.

In the first to fifth embodiments, the shape of the brake component is a cylinder, but the shape is not limited to this and may be a polygonal prism or the like.

[0017]

[Effect of device]

 As described above, according to the feeding device of the present invention, even if the knob 13a is turned to adjust the inclination of the feeding device 11, the brake component 14 is in contact with the table with a large frictional force, so that the feeding device is 11 does not move horizontally. Further, since the weight of the feeding device 11 is supported by the highly rigid fixed foot 12 and the variable height foot 13, the feeding device 11 does not fluctuate up and down during the measurement. Therefore, the surface roughness and contour shape of the work 21 can be accurately measured.

[Brief description of drawings]

FIG. 1 is a diagram showing a feeding device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a fixed foot portion of the feeding device according to the first embodiment.

FIG. 3 is a diagram showing a fixed foot portion of a feeding device according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a fixed foot portion of a feeding device according to a third embodiment of the present invention.

FIG. 5 is a diagram showing the vicinity of a fixed foot of a feeding device according to a fourth embodiment of the present invention.

FIG. 6 is a diagram showing the vicinity of a fixed foot of a feeding device according to a fifth embodiment of the present invention.

[Fig. 7] Overall view of a general simple type surface roughness measuring machine

8 is a bottom view of the feeding device portion of FIG.

FIG. 9 is an overall view of a general simple contour profile measuring machine.

[Explanation of symbols]

 10 table 11 feeder 12 fixed foot 13 height variable foot 14 brake parts

Claims (2)

[Scope of utility model registration request] 1. A feeder for a simple surface roughness measuring machine and a contour shape measuring machine in which the feeder is placed directly on a table, wherein a fixed foot attached to the lower surface of the feeder, a variable height foot, and A brake device provided in the vicinity of a fixed foot, and a feeder. 2. The feeding device according to claim 1, wherein the brake component is provided on the outer periphery of the fixed foot.