JPH023408Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mechanical member formed by casting, forging, or the like.

[Prior art] Conventionally, mechanical parts manufactured by casting, forging, welding, or other manufacturing methods are subjected to a removal process such as shot blasting to remove foreign substances such as casting sand that adheres during molding and chips generated during processing. is going on. However, in the case of a mechanical member having a hollow part, it is difficult to completely remove sand, chips, etc. adhering to the inside of the hollow part even by the above-mentioned treatment.
Furthermore, complete removal requires a huge amount of equipment, and even in that case, complete removal is virtually impossible.

Therefore, for example, in mechanical parts such as ultra-precision surface plates with extremely high surface precision, sand, chips, etc. that are not removed and remain in the hollow parts may fall due to vibrations during transportation and adhere to the surface. This led to the loss of its role as a precision instrument. Further, although the above-mentioned disadvantages can be eliminated by removing the hollow portion, this hollow portion is often structurally essential to the mechanical member.

Furthermore, in order to solve the above problem, conventional methods have been to cover the hollow part and secure it with screws to seal out sand, chips, etc., but due to the structural design, the hollow part is forced into an unreasonable shape. This result is not only unfavorable, but also causes problems such as increased weight and increased cost.

[Purpose of the invention] The present invention was made in view of the problems of the conventional technology as described above, and its purpose is to easily completely seal off foreign substances such as sand and chips that adhere to the hollow part, and to The object of the present invention is to propose a mechanical member that can provide dust-proofing, waterproofing, etc. effects for hollow parts, as well as vibration-proofing and electrical insulation.

Further, another object of the present invention is to propose a mechanical member that can reduce weight and cost.

[Summary of the invention] The present invention, which achieves the above object, is a machine member having a hollow part, in which the hollow part is filled with a filler made of a foaming agent to seal foreign matter adhering to the hollow part. .

[Example] Hereinafter, the present invention will be explained in detail using drawings showing a preferred embodiment. The embodiment is a case where the present invention is applied to a precision surface plate as a mechanical member.

FIG. 1A is a plan view of a precision surface plate according to an embodiment;
FIGS. 1B and 1C are side views of the precision surface plate viewed from the directions of arrows B and C, respectively. In the figure, 1a is the used surface of precision surface plate 1, which is finished to a surface accuracy of several microns. 2 is a side surface, and 3 is a partition formed on the back surface of the use surface 1a. As shown in the figure, a plurality of hollow portions 4 are formed on the back surface of the use surface 1a by the side surface 2 and the partition portion 3. Further, as shown in FIGS. 2A and 2B, a flange portion 5 of a predetermined width is integrally formed at the end of the side surface 2 and the partition portion 3, and the hollow portion 4 is shaped like a bag by this flange portion 5. It's summery.

In such a precision surface plate in which the hollow portion 4 is bag-shaped, sand, chips, etc. that adhere to the bag-shaped portion during molding and processing are likely to remain without being removed. Therefore, in the precision surface plate 1 according to this embodiment, a foaming agent such as urethane foam or styrofoam and a hardening agent are mixed into the bag-shaped portion formed by the flange portion 5 as shown in FIGS. 2A and B. The bag was filled with a filler 6 made of the following, and sand, chips, etc. adhering to the bag-shaped portion were sealed with the filler 6. This eliminates disadvantages such as sand, chips, etc. adhering to the hollow portion 4 falling and damaging the surface plate 1 used, 1a, impairing its role as a precision instrument.

In addition, in order to fill the filler 6, the filler 6, which is rapidly stirred with a foaming agent and a hardening agent suitably mixed, is simply injected into the bag-shaped portion of the hollow portion 4 using an appropriate container and allowed to harden. Yes, and it is extremely easy to do. Moreover, it hardens almost completely in about 3 to 5 minutes after injection. Also, no unreasonable force is applied during curing, and the flatness of the surface plate 1 is not impaired. According to the filler 6, extremely good sealing performance can be obtained, and there is almost no deterioration due to aging.

In addition, urethane foam used for the filler 6,
Styrofoam and the like are usually molded into a desired shape and are widely used as cushioning materials, vibration-proofing materials, etc., and the raw materials are easy to obtain and use.

As described above, according to the precision surface plate 1 of this embodiment, the hollow portion 4 can be easily completely sealed from sand, chips, etc. Furthermore, compared to the conventional case where a cover or the like is screwed and sealed, there is no need to change the structure of the surface plate 1, and there is no need to perform secondary processing. Furthermore, since the filler 6 is extremely lightweight and inexpensive,
The weight reduction of the surface plate 1 is not impaired and the cost can be reduced.

Further, in the above embodiment, only the bag-shaped portion was filled with the filler 6, but the hollow portion 4
It may be filled entirely. In this way, it is possible to completely prevent water, oil, dust, etc. from entering the hollow portion 4. Further, by filling the filler 6 so as to cover not only the hollow portion 4 but also the upper part of the flange portion 5, in addition to the above-mentioned effects, effects such as vibration isolation, heat insulation, and electrical insulation can be obtained.

Furthermore, although the above embodiments have been described using a precision surface plate as an example of a mechanical member, it goes without saying that the present invention can be applied to any mechanical member having a hollow portion other than a precision surface plate formed by casting or the like.

[Effects of the Invention] As described above, according to the present invention, it is possible to easily completely seal off foreign substances such as sand and chips adhering to the hollow portion. This provides dustproof and waterproof effects for the hollow portion, as well as vibration proofing and electrical insulation. Furthermore, since a foaming agent is used, the weight of the mechanical member is not impaired, and the cost is low. Further, in the conventional method of screwing a cover or the like to the hollow part, it was necessary to force the hollow part into an unreasonable shape, but with the present invention, there is no need to change the shape.

[Brief explanation of the drawing]

1A is a plan view of a precision surface plate according to an embodiment of the present invention, FIG. 1B is a side view of FIG. 1A viewed from the direction of arrow B, and FIG. 1C is a view of FIG. Side view seen from direction C, Figure 2 A and B are a-a of Figure 1 A
FIG. Here, 1... precision surface plate, 2... side, 3...
Partition part, 4...Hollow part, 5...Flange part, 6
...It is a filling material.

Claims (1)

[Claims for Utility Model Registration] (1) A mechanical member having a hollow portion, characterized in that the hollow portion is filled with a filler made of a foaming agent to seal foreign matter adhering to the hollow portion. mechanical parts. (2) The mechanical component according to claim 1, wherein the filler is a mixture of a foaming agent and a hardening agent.