JPH018305Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a surface plate used when performing various measurement operations.

Surface plates used as reference stands during various measurement tasks require properties such as high rigidity, wear resistance, high hardness, and shape stability, so natural stones such as granite have traditionally been widely used. It had been. However, natural stones with the various characteristics required for such surface plates are limited and are becoming increasingly difficult to obtain. In particular, with the recent increase in the size of objects to be measured, it has been difficult to obtain natural stone that can be used for surface plates with large areas. Moreover, in this case, it was also difficult to smoothen the natural stone over a wide area.

By the way, it is possible to use ceramic materials with characteristics such as high rigidity, abrasion resistance, and high hardness in place of natural stone materials, but simply using ceramic materials as a substitute for conventional natural stone materials is not suitable for ceramic materials. It is unsuitable for reasons such as the large size of the incinerator used to form the material. Furthermore, when ceramic materials are used, it is not possible to use a stand equipped with a magnetic fixing means (magnetic stand), as is the case when natural stone materials are used.

The purpose of this invention is to provide features required for a surface plate such as high rigidity, wear resistance, and high hardness without using natural stone, and also to be able to use a magnetic stand, and to be easy to manufacture. The purpose is to provide a surface plate.

Therefore, the present invention involves adhesively fixing multiple pieces of ceramics of a certain thickness on the front, back, left, and right sides with features such as high rigidity, wear resistance, and high hardness on a metal base that is easy to obtain and process. , a suitable gap is provided between each ceramic piece, and a magnetic material made of adhesive containing metal powder is provided in this gap to enable the use of a magnetic stand, thereby achieving the above object. This is what I am trying to do.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an embodiment of a surface plate according to the present invention. In the figure, the upper end surface 13 of a metal base 12 having legs 11 at the four corners is polished smooth. A plurality of cylindrical female female pipes 15 each having a screw hole 14 on the inner peripheral surface are buried in the upper end surface 13 in a predetermined arrangement (see FIG. 2).

The upper end surface of the female pipe 15 is at the same height as the upper end surface 13 or slightly lower, and the screw hole 14 is at the same height as the upper end surface 13.
It is opened at.

A plurality of ceramic pieces 16 having the same shape and a constant thickness are adhesively fixed on the upper end surface 13 in the front, rear, left and right directions via an adhesive layer 17 (see FIG. 2). A through hole 18, which is equal to or larger than the screw hole 14, is formed in, for example, the center of each of these ceramic pieces 16, and these through holes 18 are in a state where they are exactly overlapped on the screw hole 14. There is. Further, a small gap 19 is provided between the ceramic pieces 16, and the upper end surfaces of the plurality of ceramic pieces 16 are configured to form the same plane. Note that gap 19
The width is slightly exaggerated in the drawing.

Further, a magnetic body 21 is buried in the gap 19, and the upper surface of this magnetic body 21 is exposed. The magnetic body 21 is formed by embedding an adhesive containing metal powder in the gap 19. The magnetic body 21 is polished together with the ceramic piece 16 when smoothing the upper end surface of the ceramic piece 16, and at this time, as shown enlarged in FIG. 3, the degree of polishing is greater than that of the ceramic piece 16. Therefore, the height is lower than the height of the ceramic piece 16, and the cross section is, for example, arcuate.

According to this embodiment, the magnetic stand can be fixed on the magnetic body 21.
Moreover, since the magnetic bodies 21 are arranged in a predetermined manner over the entire area on the upper end surface 13 of the base 12, the fixing locations of the magnetic stand are not greatly restricted, and the use of the magnetic stand is This has the advantage that it does not cause any inconvenience in practice.

Furthermore, in the embodiment described above, since the height of the magnetic body 21 is formed lower than the height of the ceramic piece 16, when sliding various measuring instruments such as a height gauge on the upper end surface of the ceramic piece 16,
Even if the magnetic body 21 itself is not smooth, there is an advantage that the height gauge and the like do not get stuck on the magnetic body 21, and smooth measurement work can be performed. In other words, the friction coefficient of the entire upper end surface (reference surface) of this surface plate can be made small.

Furthermore, since the object to be measured and various measuring instruments are placed directly on the upper end surface of the ceramic piece 16, the characteristics of the ceramic piece 16 can be utilized without using natural stone such as granite. High rigidity,
It is possible to provide various characteristics required for a surface plate, such as wear resistance and high hardness.

Furthermore, it is possible to form each ceramic piece 16 with high precision because it does not require a large incinerator and is easy to polish. 16 can be successively adhesively fixed onto the upper end surface 13 to form a smooth surface with a wide area as a whole, so it is easy to form surface plates of various sizes with high accuracy.

In addition, a through hole 18 (not threaded) is simply formed in the ceramic piece 16 itself, and a screw hole 14 for attaching the equipment to be attached (an object to be measured, a measuring device, a jig, etc.) is processed and manufactured. It is provided on a metal base 12 that is easy to use. Therefore, it is possible to provide a surface plate on which a device to be mounted can be attached, even though the ceramic piece 16 does not require difficult processing such as thread processing. Therefore, from this point of view as well, the economic burden is small. Furthermore, by preparing and preparing a plurality of ceramic pieces 16 of a certain size in advance, it is possible to easily manufacture various surface plates using these ceramic pieces 16 of the same size, resulting in excellent productivity. ing. Moreover, unlike the case of gluing a large single plate-shaped ceramic piece, the gluing work to the surface plate 12 can be performed easily and with high precision.

Furthermore, since the magnetic body 21 formed in the gap 19 between the ceramic pieces 16 is made of an adhesive containing metal powder, the magnetic body 21 can be easily formed by applying the adhesive along the gap 19. . Then,
The surface plate can be manufactured easily.

Furthermore, since minute gaps 19 are provided between the ceramic pieces 16, deformation of the overall shape due to the difference in thermal expansion coefficient between the ceramic pieces 16 and the base 12 can be eliminated.

In addition, in practice, the magnetic body 21 is not limited to the case where the cross section is arcuate and is formed lower than the ceramic piece 16; for example, as shown in FIG. 4, the magnetic body 21 may be formed to have a rectangular cross section. Furthermore, as shown in FIG. 5, the heights of the magnetic body 21 and the upper end surface of the ceramic piece 16 may be the same.

Further, in the embodiment described above, a screw hole 14 was provided for screwing and mounting the equipment to be mounted, but even if the screw hole 14 is not particularly provided as in the embodiment shown in FIG. good. However, if the screw hole 14 is provided, the above-mentioned effects can be obtained.

Further, the shape of the ceramic piece 16 is not limited to a rectangular shape, but may be a triangular or hexagonal shape, and the shapes of the plurality of ceramic pieces 16 do not have to be the same. Any material may be used as long as it has a constant thickness so that it can be adhesively fixed on the end surface 13 and form the same smooth surface.

As mentioned above, according to the present invention, it has the characteristics required for a surface plate such as high rigidity, wear resistance, and high hardness without using natural stone, and also allows the use of a magnetic stand. A surface plate that is easy to manufacture can be provided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the overall structure of an embodiment of the surface plate according to the present invention, FIG. 2 is an enlarged sectional view taken along the - line in FIG. 1, and FIG. FIGS. 4 and 5 are enlarged cross-sectional views showing the structure of the magnetic body in other embodiments, and FIG. 6 is a perspective view showing the overall structure of the surface plate in other embodiments. It is. 12... Base, 13... Upper end surface, 14... Screw hole, 16... Ceramic piece, 18... Through hole,
19...Gap, 21...Magnetic material.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of ceramic pieces of a certain thickness are adhesively fixed to the upper end surface of a metal base in the front, back, left and right so as to have a predetermined gap between them. A surface plate characterized in that a magnetic material made of adhesive containing metal powder is embedded in the surface plate. (2) Utility Model Registration The surface plate according to claim 1, characterized in that the upper surface of the magnetic body is exposed and is formed lower than the upper end surface of the ceramic piece.