JPS6020617B2 - Elastomer molded body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elastomer molded body that exhibits a spring-like effect when compressive loads are applied to both end faces, and more specifically, an elastomer molded body that has a concave seat that prevents compressive loads from being applied to the center of the end faces. The present invention relates to an elastomer molded article that has improved buckling resistance by forming a loop portion.

Conventionally, as shown in Figure 1, rubber has been used with durability and elasticity. It is formed into a cylindrical or cylindrical shape (not shown) using materials such as synthetic rubber or synthetic resin, and its both end faces 2 are cut in a plane perpendicular to the marlin, and the entire surface of both end faces receives a compressive load. An elastomer molded body 1 that exhibits a spring-like effect is known. This type of elastomer molded body 1 was subjected to a compressive load on the entire surface of both end faces, so when it is used with a large compressive load applied to both end faces, the height (day) becomes approximately twice the diameter D or more. , which has the disadvantage of being susceptible to seat deformation as shown in Figure 2, and a high performance product with excellent buckling resistance against compressive force has been desired. The present invention was made in response to this demand, and an object of the present invention is to provide an elastomer molded article with excellent seating resistance. In order to achieve this object, the elastomer molded article according to the present invention has a configuration in which a concave seat portion is provided at the center of the end face to prevent compressive loads from being applied.

Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings. FIG. 3 shows an embodiment of the present invention, in which an elastomer molded body 3 is formed into a thick cylindrical shape using a material such as rubber, synthetic rubber, or synthetic resin that is highly durable and elastic.
has a concave suppository portion 4 with a predetermined depth and diameter on both end faces.
An annular rib 5 is formed by forming the ribs concentrically.

If such a structure is adopted, the elastomer molded body 3 will be elastically deformed as shown in FIG. 4 when subjected to a compressive load.

In other words, the shoulders begin to bulge outward,
Buckling is less likely to occur. Next, an experimental example of the present invention will be explained.

Experimental Example 1 Elastomer molded body 3 provided with the concave suppository portion 4 as described above
In order to investigate the excellent buckling resistance and properties of Using the molded body 3, the depth of the concave suppositories 4 was set to 4, and the diameter ○ was varied, and the relationship between the compressive load and the amount of deflection was investigated, and the results shown in Figure 6 were obtained. .

The curves indicated by numerals 1 to 5 in FIG. 6 correspond to the M. 1~M. 5 samples are shown. Table 1. As shown in FIG. 6, when the diameter of the concave suppository portion 4 was varied and the relationship between compressive load and deflection was investigated, it was found that M. 2 ~ Yuzu. Sample No. 4 withstood the largest load and was less likely to cause wind.

That is, the concave suppository portion 4 with respect to the outer diameter of the elastomer molded body 3
It was found that the best buckling resistance was exhibited when the inner diameter was within the range of approximately 77%. Further, the diameter D of the concave seat portion 4 is 1.7 with respect to the diameter of the center hole (22 ribs).
It has been found that approximately 2.9 to 2.9 tones is preferable. Furthermore, as is clear from the hysteresis curves of each sample in FIG. 2~M. It was also found that sample No. 4 had excellent restorability.

In addition, the curve indicated by the symbol A in FIG.
If the concave suppository portion 4 is formed, the M. 1~earth. It was found that all samples No. 5 had superior buckling resistance compared to conventional products.

Experimental Example 2 Next, the diameter of the concave suppository portion 4 is set to 46 mm as shown in Figure T, and the depth L is varied to examine the relationship between the compressive load and the amount of deflection, as shown in Figure 8. The results shown are obtained.

In FIG. 8, the curves indicated by numerals 6 to 12 correspond to the M. 6 ~ Tsumugi. 12 samples are shown. As is clear from Table 2, Figure 8, the sample size is 1. 8~No. 10 indicates excellent buckling resistance, and it can be seen that if the diameter is constant, the optimum depth is 3 to 5 skins.

Further, assuming that the height of the elastomer molded body 3 made of urethane material is day and the diameter is ○, H/D is 2 to 2. The buckling resistance was remarkable in terms of technical strength.

In the above-mentioned embodiments, the concave suppositories 4 are provided at both ends of the elastomer molded body 3, but the concave suppositories 4 may be formed only on one end surface, and the concave end surface may be flat. A flat structure may also be adopted. Moreover, it can also be applied to a bottomed cylindrical elastomer molded body. In the above-mentioned example, the shape was illustrated as a thick-walled cylinder, but even if the shape is formed into a cylinder and the concave seat part 4 is formed on at least one end surface, the same effect can be achieved in the same aircraft. Effects can be obtained.

Further, the present invention is not limited to the above-mentioned embodiments, but is also effective even if the peripheral surface shape is tapered or arcuate, and the hollow part is tapered or stepped.

As described above, the present invention has a concave suppository part that prevents compressive loads from being applied to the central part of the end face, so it has an excellent practical effect of exhibiting remarkable seating resistance against compressive forces. be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional elastomer molded product, FIG. 2 is a perspective view of the elastomer molded product when it is compressed, FIG. 3 is a perspective view of an elastomer molded product according to an embodiment of the present invention, and FIG. A perspective view, FIG. 5 is a partially enlarged sectional view of the elastomer molded body used in Experimental Example 1 of the present invention, FIG. 6 is a load-wave diagram of the elastomer molded body, and FIG. 7 is an experiment of the present invention. FIG. 8 is a partially enlarged sectional view of the elastomer molded body used in Example 2, and is a load-sag line diagram of the elastomer molded body. 1, 3... Elastomer molded body, 2... aspect, 4...
・Concave suppository part, 5...Rep. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] 1. In an elastomeric molded body that is formed into a cylinder or column shape using materials such as rubber, synthetic rubber, or synthetic resin, which are highly durable and resilient, and which exhibits a spring-like effect by receiving compressive loads on both end faces, An elastomer molded article characterized in that a concave seat part is formed in the central part of the body to prevent compressive loads from being applied.