JP2797812B2 - Anti-vibration or cushioning material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration or cushioning member having independent hollow portions inside a member.

[0002]

2. Description of the Related Art Conventionally, as a structure of a vibration-proof or cushioning member for absorbing and mitigating vibration or shock, FIGS.
As shown in FIG. 1, a vibration-proof or cushioning member 21 is used in which cylindrical projections 22 are arranged at predetermined intervals on both main planes of a flat plate made of a rubber member. Also, Japanese Patent Application Laid-Open
As described in Japanese Patent No. 24948 and Japanese Patent Application Laid-Open No. 3-36207, there has been proposed a device in which a plurality of independent protrusions and a hollow portion corresponding to the protrusions are arranged on one side.

[0003]

However, in the above configuration, the selection of the material is restricted, and
The selection range of rubber hardness is limited, and it is difficult to arbitrarily set the spring constant as an elastic function, it is difficult to withstand high loads, it is inferior in heat resistance, and it is difficult to reduce the weight in the case of a hollow shape. Was.

The present invention has been made in view of the above problems, and provides a vibration damping or cushioning member that can increase the selection range of materials and spring constants and realize weight saving.

[0005]

The vibration-damping or cushioning member structure of the present invention has a plurality of projections on at least one main plane by applying a hollow injection molding technique, and has an X-shaped or cross-shaped or T-shaped. An integrated structure in which a plurality of independent hollow portions are disposed in a predetermined manner inside a member via a partitioning plate (partition wall) that intersects in the shape of a letter, is formed by one molding die and the injection molding die is fixed and movable. Are formed integrally by sliding each other and secondary molding, and are formed by injection molding or a combination of injection molding and blow molding.

That is, each half is injection-molded by primary molding using one molding die, and then the injection-molding dies formed with the halves are mutually slid between the fixed side and the movable side. By the secondary molding, the respective halves are joined by a secondary molded resin member to be integrally molded.

More specifically, as shown in FIGS. 9 to 13, a hollow structural plate 300 is formed by joining two hollow structural plate halves 301 and 302 formed by primary molding with a secondary molded resin member (not shown). And an independent hollow part 303,
304 are arranged in an aligned state.

In each of the halves 301 and 302, a groove 307 for introducing and filling the secondary molding resin member and connecting the halves to each other is provided in a partition wall 305, and a stepped concave portion 306 is provided in a periphery of an end surface. It is arranged in. The procedure of the primary molding and the secondary molding is as described above.

Further, the vibration-damping or shock-absorbing member structure of the present invention has a plurality of projections on at least one main plane by applying a hollow injection molding technique, and intersects in an X shape, a cross shape or a T shape. An integral structure in which a plurality of independent hollow portions are arranged in a predetermined manner inside a member via a partition plate (partition wall), which is formed by one-shot molding (single molding). It is constituted by a combination of injection molding and blow molding.

[0010]

According to the present invention, the selection of the material and the spring constant is widened by the above-mentioned structure, and many members such as various synthetic resins can be used in addition to the rubber member. Realize.

[0011]

1 to 8 show an embodiment of the present invention.
This will be described with reference to the drawings shown in FIG. FIGS. 1 to 8 show four embodiments of the present invention. The vibration-damping or cushioning member of the illustrated embodiment can be formed by integral molding with one molding die or by one-shot molding (one-time molding). ) To form an integrated structure with a built-in independent hollow portion via an intersecting partition plate (partition), and does not require joining or assembly of components.

FIG. 1 is a plan view showing a vibration damping or cushioning member according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along a line S1-S1 of FIG.
1 shows a cross-sectional view from the side as viewed from the direction.

In FIG. 1 and FIG. 2, a vibration-damping or cushioning member 1 according to a first embodiment has two types of differently sized cylindrical projections 2 arranged on one main plane of a flat plate at predetermined intervals. Are arranged symmetrically via a partition wall 18 (partition plate) that intersects the hollow portions, thereby making the elastic function of the projection different between the end portion and the central portion. That is, the protrusion 2
The hollow portion 3 having a small volume corresponding to one protruding block is symmetrically disposed at six locations in a portion located on the lower surface of the flat plate and near the end of the flat plate, and the central portion corresponds to two protruding blocks. A hollow portion 4 having a large volume is provided on the lower surface of the projection.

In the first embodiment, when the projection 2 is pressed in the thickness direction of the member, the spring constant of the projection arranged at the center is smaller than the spring constant of the projection arranged at the end. That is, the dimension from the fixed support portion to the projection center is changed.

As a matter of course, the anti-vibration or cushioning member 1
Is configured such that an apparatus or a device is mounted on the side of the projection 2 to reduce vibration and impact, or as a contact surface for an impacted object.

FIG. 3 is a plan view showing an anti-vibration or cushioning member according to a second embodiment of the present invention. FIG. 4 is a sectional view taken along section lines S2 to S2 in FIG.
1 shows a cross-sectional view from the side as viewed from the direction.

The vibration damping or cushioning member 5 of the second embodiment is
The protrusion 2 is provided on the other surface of the vibration-proof or cushioning member of the first embodiment in a predetermined manner. The basic function is to alleviate vibration and impact on both sides as in the first embodiment.

FIG. 5 is a plan view showing an anti-vibration or cushioning member 11 according to a third embodiment of the present invention, and FIG.
FIG. 3 shows a cross-sectional view from the side as viewed from the S3 direction.

The anti-vibration or cushioning member 11 of the third embodiment
Is a modification of the configuration of the vibration isolating or cushioning member of the first embodiment, in which the shape of the hollow portion provided inside the member is modified.

That is, as one having a plurality of thin protrusions 12 on one main plane, a plurality of hollow portions 13 and 14 having a shape corresponding to the shape of the thin protrusions are provided independently inside the member. The structure is formed by integral molding with one molding die or by one molding operation. More specifically, a plurality of independent thin projections 12 and first hollow portions 13A and 14A having a shape corresponding to the shape of the thin projections are provided on one main plane, and the plurality of first hollow portions are provided. This is an integrated structure in which a plurality of second hollow portions 13 and 14 communicating with each other are independently disposed via a partition wall 18 intersecting therewith.

The appearance of the thin projections 12 is the same as that of the projections 2 of the first embodiment, but the thickness of the projections is made thin to facilitate deformation when subjected to vibrations and shocks, thereby preventing vibrations or vibrations. The buffer effect is further enhanced, and the degree of freedom in design is expanded. Of course, the choice of materials is widened, and in addition to rubber members, it is possible to use injection-moldable members such as various synthetic resins and ceramics, or metal powder kneaded with a predetermined binder or glass powder kneaded with a predetermined binder. is there.

In the case of a ceramic member, when a shock is applied to the projection surface, the structure may be configured to crash and reduce the impact.

FIG. 7 is a plan view showing an anti-vibration or cushioning member 15 according to a fourth embodiment of the present invention. FIG.
FIG. 4 shows a cross-sectional view from the side as viewed from the S4 direction.

The anti-vibration or cushioning member 15 of the fourth embodiment
In the third embodiment, a thin projection 12 is provided on the other surface of the vibration-proof or cushioning member of the third embodiment. The basic function is to alleviate vibration and impact on both sides as in the third embodiment.

In the above embodiment, the total volume occupied by the hollow portions 3, 4 or 13, 14 is set to 20% to 90% of the volume occupied by the outer shape of the vibration-proof or cushioning member. The total volume occupied by the hollow portions may be determined according to the purpose of use, the spring constant or the required strength, and the members constituting the vibration-proof or cushioning member.

As described above, the anti-vibration or cushioning member of the present invention has a plurality of projections or thin projections on at least one main plane, and a plurality of independent hollow portions provided inside the member in a predetermined manner. In addition, the absorption and mitigation performance of vibration and shock are improved, and the degree of freedom in design is increased. Further, by providing the hollow portion, the weight of the member can be significantly reduced, the material used can be reduced, and the cost can be reduced.

In the embodiment of the present invention, a columnar example is described as the shape of the projection. Needless to say, another shape may be used. Does not need to be flat, and even if it is an arc-shaped projection or a concave surface, it does not matter at all. Of course,
The outer shape of the vibration-proof or shock-absorbing member does not need to be flat, and any three-dimensional shape may be formed.

[0028]

As described above, according to the anti-vibration or shock-absorbing member of the present invention, the selection range of the material and the spring constant is widened, and many members such as various synthetic resins can be used in addition to the rubber member. The shape can be set arbitrarily to achieve weight reduction and cost reduction.

[Brief description of the drawings]

FIG. 1 is a plan view of an anti-vibration or cushioning member according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 as viewed from a cutting line S1 to S1 direction.

FIG. 3 is a plan view of an anti-vibration or cushioning member according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of FIG. 3 as viewed from a cutting line S2 to S2.

FIG. 5 is a plan view of an anti-vibration or cushioning member according to a third embodiment of the present invention.

FIG. 6 is a cross-sectional view of FIG. 5 as viewed from a cutting line S3 to S3.

FIG. 7 is a plan view of an anti-vibration or cushioning member according to a fourth embodiment of the present invention.

FIG. 8 is a cross-sectional view from the side of FIG. 7 as viewed from the direction of cutting lines S4 to S4.

FIG. 9 is a plan view of a hollow structural plate used for explaining a forming means of the embodiment of the present invention.

FIG. 10 is a front view of a hollow structural plate used for describing a forming means according to an embodiment of the present invention.

FIG. 11 is a cross-sectional view of a hollow structure plate used in the description of an embodiment of the present invention, taken from a side direction in a forming order.

FIG. 12 is a plan view of an aerial structure plate half used for describing the forming means of the embodiment of the present invention.

FIG. 13 is a front sectional view of a hollow structural plate half used for describing the embodiment of the present invention.

FIG. 14 is a plan view of a conventional anti-vibration or cushioning member.

FIG. 15 is a cross-sectional view of FIG. 14 as viewed from the side of the cutting lines S5 to S5.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration-proof or buffer member 2 Projection 3 Hollow part 4 Hollow part 5 Vibration-proof or buffer member 11 Vibration-proof or buffer member 12 Thin projection 13A First hollow part 14B First hollow part 13 Second hollow part 14 Second 15 Vibration-proof or cushioning member 16A First hollow portion 17A First hollow portion 16 Second hollow portion 17 Second hollow portion 18 Partition wall 300 Hollow structure plate 301 Hollow structure plate half 302 Hollow structure plate half Body 303 Hollow part 304 Hollow part 305 Partition wall 306 Stepped concave part 307 Groove

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29L 24:00 (72) Inventor Kazuhiko Kodama 1006 Ojidoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Shimizu Kaoru 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-60-24948 (JP, A) JP-A 1-112045 (JP, A) JP-A 61-11207 ( JP, A) JP-A-63-152561 (JP, A) JP-A-60-24948 (JP, A) JP-T-2-502986 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , (DB name) F16F 15/00-15/32 B29C 45/00-45/84

Claims (2)

(57) [Claims] A plurality of independent thin projections and a first hollow portion having a shape corresponding to the shape of the thin projection are provided on at least one main plane, and the plurality of first hollow portions are provided on a plurality of the first hollow portions. The secondary structure is formed by sliding one injection molding die and an integrated structure formed by independently arranging a plurality of independently through a partition wall intersecting the second hollow portion communicating in common with one injection molding die. Anti-vibration or cushioning member formed by: 2. A plurality of independent thin projections and a first hollow portion having a shape corresponding to the shape of the thin projections are provided on at least one of the main planes. An anti-vibration or shock-absorbing member formed by one-shot molding of an integral structure independently provided by a plurality of members via a partition wall intersecting a second hollow portion communicating in common.