JP2016125528A - stopper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stopper which eases an impact when a large load is suddenly applied thereto and has high quietness.SOLUTION: A stopper includes: an exterior body 1 having an opening 3 on the bottom surface, formed in a lidded cylindrical shape, and made of a rubber elastic body; and an interior body 2 disposed in the exterior body 1 and made of a rubber elastic body. A space 7 is formed between the interior body 2 and the exterior body 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stopper made of a rubber-like elastic body that can be widely used for industrial applications, such as a stopper for preventing a fall of an overhead crane trolley and a stopper of a door.

  Conventionally, as described in Patent Document 1, as a vibration-proof rubber unit, a rubber material having a low hardness (hereinafter referred to as a low hardness rubber material) is high and a rubber material having a high hardness (hereinafter referred to as a high hardness rubber material). Is known to have a low profile. Specifically, the anti-vibration rubber unit is installed on the underframe, the upper floor is placed on the top of the low-hardness rubber material, and when a load is applied to the upper floor, the high-hardness rubber material is compressed and the high hardness When it becomes the same height as the rubber material, it is structured to support the load with the low hardness rubber material and the high hardness rubber material.

JP 2009-228697 A

  However, in the above vibration proof rubber unit, when a large impact force is applied to the upper floor, the upper floor directly hits the high hardness rubber material when the low hardness rubber material is compressed and deformed to the height of the high hardness rubber material. At that time, there was a problem that a collision sound was generated and the impact force could not be alleviated.

  Therefore, in view of the above problems, an object of the present invention is to provide a stopper that can alleviate an impact even when a large load is applied and that is excellent in quietness.

  In order to solve the above-described problems, a stopper according to an aspect of the present invention includes an exterior body made of a rubber-like elastic body formed in a covered cylindrical shape having an opening on a bottom surface, and a rubber-like body disposed inside the exterior body. An interior body made of an elastic body is provided, and a space is formed between the interior body and the exterior body.

  According to the above configuration, since a space (hereinafter simply referred to as a space) is formed between the exterior body and the interior body, the exterior body compresses the space when a load is applied to the top of the exterior body. After being bent (displaced) by elastic deformation in the direction and contacting the interior body, the exterior body and the interior body are both compressed and deformed.

  In other words, the spring constant of the stopper does not change abruptly during the displacement of the stopper, but gradually increases as the stopper is displaced, so that even when a large impact force is applied to the stopper, a loud collision sound is generated. It is possible to effectively reduce the impact force without doing so.

  The exterior body may be composed of a plurality of covered cylindrical rubber-like elastic bodies arranged around the interior body, and spaces may be formed between the rubber-like elastic bodies. Thereby, it is possible to further suppress a rapid change in the spring constant of the stopper.

  Moreover, the rubber-like elastic body constituting the exterior body and the rubber-like elastic body constituting the interior body can be formed of materials having different hardnesses. This makes it possible to adjust the spring characteristics of the stopper more widely.

  The interior body may have a covered cylinder shape or a column shape. In the case of a columnar shape, as in the case of a covered cylinder, by forming a space inside, the cushioning property of the interior body can be enhanced, so that a stopper with more excellent shock absorption can be obtained.

  In the present invention, an interior body and an exterior body of a stopper including an exterior body made of a rubber-like elastic body formed into a covered cylinder and an interior body made of a rubber-like elastic body arranged inside the exterior body, Since a space is formed between the two, it is possible to effectively relieve the impact force, and it is possible to obtain a stopper having excellent silence.

The longitudinal cross-sectional view which shows the stopper of 1st Embodiment Partial longitudinal sectional view showing the stopper of the second embodiment Longitudinal sectional view showing the stopper of the third embodiment Graph showing the load-displacement curve of the stopper Longitudinal section showing a stopper for comparison material

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a stopper according to the first embodiment. As shown in the figure, the stopper according to the present embodiment includes a covered cylindrical body, that is, an exterior body 1 made of a rubber-like elastic body formed in a shape in which the heel is turned down, and a rubber-like elastic body disposed inside the exterior body 1. And an interior body 2 made of a body. The interior body 2 is formed in a columnar shape. The shape of the exterior body 1 is not particularly limited as long as it is a covered cylinder. Specifically, in addition to the covered cylinder, the interior that leads to the bottom opening, such as a covered polygonal cylinder, a dome, or a hollow hemisphere. It has a wide space and includes a three-dimensional shape in which surfaces other than the bottom surface are sealed.

  As shown in FIG. 1, the exterior body 1 has an opening 3 formed on the bottom surface. An annular substrate 4 is attached to the bottom surface around the opening 3 of the exterior body 1. The interior body 2 is formed in a columnar shape, and a disk-shaped substrate 5 is attached to the bottom surface thereof. The substrate 4 and the substrate 5 are integrally vulcanized and bonded together when the exterior body 1 is molded and the interior body 2 is molded.

  The inner body 2 is formed so that the outer diameter is smaller than the inner surface of the outer body 1. The substrate 4 is formed with a step portion 6 into which the substrate 5 can be fitted. When assembling the stopper, the interior body 2 is inserted into the opening 3 of the exterior body 1, and the substrate 5 is fitted into the stepped portion 6 of the substrate 4. Thereby, the exterior body 1 and the interior body 2 are fixed so that the central axes CA coincide with each other, and a space 7 is formed between the interior body 2 and the exterior body 1. The substrate 4 is fixed to the adherend surface by locking means such as screws.

  When a load F is applied to the top of the stopper having the above configuration in the direction of the arrow in FIG. 1, the exterior body 1 is elastically deformed and bent in the direction of compressing the space 7, and comes into contact with the top of the interior body 2. After the exterior body 1 contacts the interior body 2, both the exterior body 1 and the interior body 2 are compressed and deformed. That is, as a stopper, the spring constant until the exterior body 1 contacts the interior body 2 is relatively small, and after the exterior body 1 contacts the interior body 2, the spring constant gradually increases with displacement. It is possible to provide a non-linear spring characteristic, and the impact force from the outside can be effectively reduced.

  The space 7 can be formed on the entire surface of the interior body 2. In addition, a space can be formed in a part between the interior body 2 and the exterior body 1. In this case, the space 7 is formed above the top of the interior body 2, that is, between the exterior body 1 and the interior body 2 in the central axis direction CA so that the exterior body 1 is easily bent (displaced) easily. It is preferable to do this.

  Protrusions can be provided on the surface of the interior body 2 and / or the inner surface of the exterior body 1. Thereby, a load is applied to the top part of the exterior body 1, and the spring constant at the time of the exterior body 1 being bent by elastic deformation is controllable.

[Second Embodiment]
FIG. 2 is a partial longitudinal sectional view showing a stopper according to the second embodiment. In the present embodiment, the exterior body 1 is composed of two covered cylindrical rubber-like elastic bodies 1a and 1b which are arranged so as to surround the interior body 2 in a double manner, and are rubber. A feature is that a space 8 is formed between the elastic bodies 1a and 1b, and other configurations are the same as those of the first embodiment.

  According to the above configuration, when a load F is applied to the top of the stopper, first, the rubber-like elastic body 1a is elastically deformed in the direction in which the space 8 is compressed and contacts the top of the rubber-like elastic body 1b. After the rubber-like elastic body 1a comes into contact with the rubber-like elastic body 1b, the rubber-like elastic body 1a and the rubber-like elastic body 1b are bent by elastic deformation in the direction in which the space 7 is compressed and contact the top of the interior body 2. To do. After the rubber-like elastic body 1b contacts the interior body 2, the rubber-like elastic bodies 1a, 1b and the interior body 2 are both compressed and deformed.

  As described above, in the stopper according to the present embodiment, by applying a load to the stopper, the spring constant as the stopper is further suppressed at the initial stage of displacement of the stopper, even though the spring constant is further reduced as compared with the first embodiment. In addition, it is possible to finely adjust the spring constant until the rubber-like elastic bodies 1a and 1b and the interior body 2 are both compressed and deformed.

[Third Embodiment]
FIG. 3 is a longitudinal sectional view showing a stopper according to the third embodiment. The present embodiment is characterized in that a space 9 is provided inside the interior body 2, and the other configuration is the same as that of the first embodiment. The space 9 in the present embodiment has a disk shape in plan view and is formed in an oval shape in front view.

  According to the above configuration, when a load F is applied to the top of the stopper, the spring constant until the exterior body 1 contacts the interior body 2 is the same as that of the first embodiment, but the exterior body 1 contacts the interior body 2. Immediately after that, the inner body 2 is bent by elastic deformation in the direction in which the space 9 is compressed, and then both the outer body 1 and the inner body 2 are compressively deformed. That is, according to the stopper of the present embodiment, it is possible to finely adjust the spring characteristics of the stopper after the exterior body 1 contacts the interior body 2.

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention. For example, in the first to third embodiments, the exterior body 1 and the interior body 2 are made of a rubber-like elastic body made of the same material. However, the present invention is not limited to this, and the rubber constituting the exterior body. The elastic rubber body and the rubber-like elastic body constituting the interior body can be formed of materials having different hardnesses.

  As a specific modification, the hardness of the rubber-like elastic body arranged on the outermost side of the stopper is lowered, and the hardness of the rubber-like elastic body is made higher toward the inner side. This makes it possible to adjust the spring constant to increase as the stopper is displaced while suppressing the spring constant at the initial stage of displacement of the stopper to be smaller.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further in detail, unless this invention exceeds the summary, it is not limited to these Examples. FIG. 4 is a graph showing the relationship between the amount of displacement of the stopper top and the load when a load is applied to the top of the stopper using the stoppers produced in the first to third embodiments (load-displacement curve).

  In the figure, as a stopper of the first embodiment, a stopper in which the exterior body and the interior body are made of a rubber-like elastic body made of the same material is referred to as 1-1, and as a modified example, the constituent material of the interior body is made from the constituent material of the exterior body. The stopper that has been changed to one with higher hardness is represented as 1-2.

  Further, as the stopper of the second embodiment, the stopper using the same rubber elastic body as 1-1 is used for both the exterior body and the interior body, and as the stopper of the third embodiment, both the exterior body and the interior body are 1-1. The stopper using the same rubber-like elastic body is represented as 3. As a comparative material, the same rubber-like elastic body as 1-1 was used for both the exterior body and the interior body, and without providing a space between the exterior body 1 and the interior body 2, as shown in FIG. The stopper of the structure installed so that 2 might contact the exterior body 1 was used.

  In FIG. 4, the slope of the load-displacement curve is the spring constant. When a space is not provided between the exterior body 1 and the interior body 2 as in the comparative material, the exterior body 1 and the interior body 2 are exclusively compressed and deformed, so that the spring characteristics of the stopper are close to linear. . Therefore, when a large impact force is applied, the impact cannot be absorbed because the displacement of the stopper is small.

  On the other hand, the stoppers according to the present invention shown in 1-1 to 3 exhibit a nonlinear characteristic in which the spring constant is small at the initial stage of displacement and the spring constant gradually increases with the amount of displacement of the stopper. In other words, it is possible to suppress a sudden change in the slope (spring constant) of the load-displacement curve, so that even when a large impact force is applied to the stopper, the impact force can be absorbed while the stopper is displaced. It becomes possible.

DESCRIPTION OF SYMBOLS 1 Exterior body 2 Interior body 3 Opening 4, 5 Board | substrate 6 Step part 7, 8, 9 Space CA Center axis

Claims (4)

An exterior body made of a rubber-like elastic body formed in a covered cylindrical shape having an opening on the bottom surface, and an interior body made of a rubber-like elastic body arranged inside the exterior body, the interior body and the exterior body A stopper characterized by a space formed between the two. The exterior body is composed of a plurality of covered cylindrical rubber-like elastic bodies arranged so as to surround the interior body in multiple layers, and a space is formed between each rubber-like elastic body. Item 10. The stopper according to item 1. The stopper according to claim 1 or 2, wherein the rubber-like elastic body constituting the exterior body and the rubber-like elastic body constituting the interior body are formed of materials having different hardnesses. The stopper according to claim 1, wherein the interior body has a space inside.

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