JP3897077B2 - Sealing device using elastomer material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealing technique of a device having a sliding body, and relates to a sealing tool such as a device used in a linear guide device that guides linear motion or the like.
As shown in FIG. 1, a general sliding device in which the present invention is used includes a sliding body 1 having a ball (not shown) for moving on a rail portion, and a ball in the sliding body. It is comprised from the end cap 2 attached to the both sides of a main-body part in order to change direction in a part. The invention here relates to a sealing device 3 which is attached to the outside of the end cap of the device. The sealing tool 3 and the end cap 2 are usually attached to the main body by a fixing tool as shown in FIG.
[0002]
As shown in FIG. 1, the sealing tool 3 is obtained by baking or integrally molding a sealing member 5 on the entire “U” -shaped base material (not shown). Usually, the inner shape of the sealing member 5 is substantially the same as the cross-sectional shape of the rail, and the sealing effect is exhibited by eliminating the gap between the rail and the sliding body 1.
[0003]
[Prior art]
Conventionally, a rubber material represented by nitrile rubber, urethane rubber, fluorine rubber, or the like has been used for the seal member 5. These materials are employed because they are easy to mold and do not affect the increase in the frictional force of the sliding body because of its high elastic force. As long as the seal member 5 has a high elastic force, the seal member 5 is deformed corresponding to the movement of the slide body. Therefore, even if the seal member 5 has an inner shape smaller than the cross section of the slide body as described above, the operation of the slide body Does not affect the performance of the system.
[0004]
In addition, the material was inexpensive, had high oil resistance, and was easy to handle. As the seal member, an easily available adhesive can be used at the time of molding or after it is attached to the substrate.
[0005]
[Problems to be solved by the invention]
When a device using conventional technology is used in an environment where powdered foreign matter (ceramic powder, woodworking powder, casting powder, sputtered powder) is generated, lubrication applied to the sliding body, for example, on the rail The lubricant component of the agent is absorbed by the foreign matter and becomes dry. As a result, the following problems may occur.
[0006]
(1) In the case where the seal member is the rubber material, friction between the seal member and the sliding body is increased, the wear of the seal member is rapidly advanced, and the seal member is locally broken.
(2) If the seal member breaks, the dustproof effect is lost, foreign matter in the atmosphere enters the sliding body, wear of other parts occurs, and the rigidity and life of the entire apparatus are affected.
[0007]
For this problem, it is advantageous if an elastomer material can be used as the sealing member instead of the rubber material. This is because the elastomer material has a self-lubricating property and also has a high wear resistance. However, in order to apply an elastomer material as a sealing member, there are the following problems in application.
[0008]
(3) The adhesive for attaching the elastomer material to the base material requires a special adhesive such as an elastic adhesive, and the manufacturing process is complicated. Further, the fixing by adhesion has a drawback that durability is low and the substrate is easily peeled off.
[0009]
[Means for Solving the Problems]
The present invention employs an elastomer material having a self-lubricating property and a high wear resistance as a sealing member of a sealing device, and in order to solve the above-described problems that have occurred in fixing the elastomer material, At the same time, the above-described problem is solved and an inexpensive and high-performance dustproof seal is provided.
[0010]
【Example】
Example 1 will be described with reference to FIGS. 2, 3 and 4. As shown in FIG. 2, the sealing tool 10 of the present invention includes a base material 11 and a sealing member 12 as components. FIG. 3 is an enlarged cross-sectional view taken along the line AA in FIG. As shown here, the seal member 12 is provided with a receiving portion 20. In addition, a receiving part may be provided like the receiving part 30 in the base material 11 side, as shown in FIG. On the other hand, the side to be inserted into the receiving portion does not necessarily have to be processed into a special shape.
The material shape may remain as it is. Hereinafter, in each of the embodiments, the insertion portion includes not only a portion processed into a special shape necessary for insertion but also fitting the end portion of the member into the receiving portion as it is without processing. Shall be. Specifically, the “insertion portion” described in this specification includes a “base material” or a “seal member” that has not been processed for insertion.
[0011]
As shown in FIGS. 2 and 3, holes 13 are arranged in the base 11 along the inner edge of the base. The hole 13 may be a circle as shown in FIG. 2 or a long hole. Moreover, the material of a base material can assume a metal or a thermoplastic or thermosetting plastic.
[0012]
Here, as shown in FIG. 3, when the seal member is molded, if the seal member is integrally formed so as to go around the hole 13, the rod-shaped portion 14 that joins both sides of the receiving portion 20 is formed. At the same time as the molding is completed, the rod-shaped portion is already inserted into the hole 13, and the seal member 12 is fixed to the base material 11. FIG. 4 shows an example in which the member provided with the receiving portion is reversed. The receiving portion 30 is provided on the base 11 side, and the seal member 12 is inserted into the receiving portion 30 and is integrally formed so that the seal member wraps around the holes on both sides. As in the case of FIG. It is formed. Simultaneously with the completion of molding, the rod-shaped portion is inserted into the hole 13 and the seal member 12 is fixed to the base material 11.
[0013]
5 to 7 show examples of other modes in the first embodiment shown in FIG. As shown in FIG. 5, the outer surface of the seal portion may be outside the base material. Further, by reducing the thickness of the base material by the thickness of the seal member, one side of the outer surface of the sealing tool is made the same side as one side of the outer surface of the base material as shown in FIG. The front and back surfaces may form the same surface as the base material front and back surfaces.
[0014]
In the present embodiment, chamfered portions are formed on both sides of the base material 11 in the hole 13 provided in the base material 11, and there is an effect that the seal member 12 can be firmly fixed when integrally formed on the base material. 5 to 7, the hole 13 is chamfered, but it can be firmly fixed without chamfering.
[0015]
Example 2 is shown in FIGS. 8 to 13. Similar to Example 1, Example 2 is also common in that an insertion part is provided on one of the base material or the sealing member and a receiving part is provided on the other, and the sealing member is provided by a fixture penetrating the base material. The difference is that it is pinched.
[0016]
Specifically, in the case of FIGS. 8 to 11, the receiving portion 40 is provided on the seal member 36 side, or in FIG. 12 or 13, the receiving portion 39 is provided on the base material 35 side. Here, in the former case, the base material 35 is inserted into the receiving portion 40 of the sealing member 36, and in the latter case, the sealing member 36 is inserted into the receiving portion 39 of the base material 35.
[0017]
As described above, a fixing tool 43 such as a bolt 41 or a rivet 42 is used for fixing. The fixing member 43 is inserted into and fixed to the hole 37 to hold the sheet member. FIG. 12 shows a case where a bolt 41 is used as a fixture. In this case, the screw 38 is applied to the base material 35 and the fixture 41 (bolt) is screwed. FIG. 13 shows an example in which a rivet 42 is used as a fixture. In this case, the sealing member 36 is held on the base 35 by inserting the rivet 42 into the hole 37 and caulking both sides.
[0018]
Also in the second embodiment, the embodiment shown in FIGS. 9 to 11 can be considered as in the example of the embodiment shown in FIGS. 5 to 7 of the first embodiment.
[0019]
Example 3 is shown in FIGS. 14 and 15. In the third embodiment, the base material 45 has the protrusion 48 and the seal portion 46 has the seal portion hole 47. Further, the receiving portion 50 is provided in the seal portion 46, and when the base material 45 is inserted into the receiving portion 50, the seal portion hole 47 is fitted into the protrusion 48 (upper side in FIG. 14). In this state, when the top of the projection 48 is caulked and crushed, both sides of the sheet portion are clamped by the caulking effect like the projection 49 (lower side in FIG. 14). As another embodiment of Example 3, as shown in FIG. 15, the cross-sectional shape of the hole in the seat portion is a wedge shape that expands outward (upper FIG. 15), and then the tip of the protrusion is caulked and crushed. This is an embodiment in which the protruding head fills the wedge-shaped cross-section space and at the same time matches the surface of the sheet portion to sandwich the sheet (lower side in FIG. 15).
[0020]
According to the embodiment described above, the elastomer material can be reliably fixed on the base material, so that the elastomer material can be selected as the seal member. By using an elastomer material, an antioxidant, an acid acceptor, an antistatic agent such as carbon, a filler such as silica or alumina, a metal oxide, a colorant, and a flame retardant can be added.
[0021]
Further, in the embodiment, the side seal for the linear guide device is taken as an example in the embodiment. However, as long as the same configuration is adopted, other seals, for example, the linear guide device, the under seal 9 in FIG. Can also be used.
[0022]
【The invention's effect】
The present invention is implemented in the form as described above, and has the effects described below.
[0023]
Reliable fixing can be performed without causing peeling for a long period of time by applying an elastomeric material to the sealing member base material, not by bonding, but by physical molding by integral molding or fixing.
[0024]
By realizing this reliable fixing means, an elastomer material can be selected as the seal member. This improves the lubricity and wear resistance of the seal member compared to conventional rubber materials, improves durability, and assures long-term dust resistance, so that the initial performance can be maintained for a long time. Become.
[Brief description of the drawings]
FIG. 1 is an exploded view of a main body of a linear guide device of a typical example to which the present invention can be applied.
FIG. 2 is a front view of the sealing device of the present invention.
3 is a cross-sectional view of the first example of the embodiment of Example 1 as viewed from the direction A. FIG.
4 is a cross-sectional view of a second example of the embodiment of Example 1. FIG.
5 is a cross-sectional view of a third example of the embodiment of Example 1. FIG.
6 is a sectional view of a fourth example of the embodiment of Example 1. FIG.
7 is a sectional view of a fifth example of the embodiment of Example 1. FIG.
8 is a cross-sectional view of a first example of an embodiment of Example 2. FIG.
9 is a sectional view of a second example of the embodiment of Example 2. FIG.
10 is a sectional view of a third example of the embodiment of Example 2. FIG.
11 is a sectional view of a fourth example of the embodiment of Example 2. FIG.
12 is a sectional view of a fifth example of the embodiment of Example 2. FIG.
13 is a sectional view of a sixth example of the embodiment of Example 2. FIG.
14 is a cross-sectional view of a first example of an embodiment of Example 3. FIG.
15 is a cross-sectional view of a second example of the embodiment of Example 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sliding body 2 End cap 3, 10 Sealing tool 4, 11, 35, 45 Base material 5, 12, 36, 46 Seal member 7 Seal member inner shape 9 Under seal 13, 37 Hole 14 Rod-shaped part 20, 30, 40, 39, 50 Receiving portion 38 Screw 41 Fixing tool (bolt)
42 Fixing tool (rivet)
43 Fixing tool 47 Seal hole 48 Projection (before caulking)
49 Protrusion (after caulking)

Claims (3)

A substrate;
A sealing member made of an elastomer material;
An insertion portion provided on one of the base material or the seal member;
A receiving portion provided on the other side;
A hole provided in the base material and having a chamfered portion formed from both sides of the base material ;
A sealing tool characterized in that when the rod-like portion inserted through the hole is integrally formed with the sealing member, the sealing member is firmly fixed by the chamfered portion so that the sealing member is held by the base material. A substrate;
A sealing member made of an elastomer material;
An insertion portion provided on one of the base material or the seal member;
A receiving portion provided on the other side;
A hole provided in the insertion portion and the receiving portion;
A fixture penetrating the substrate ,
A fixing tool that fits the insertion portion and the receiving portion and penetrates the base material is inserted into the hole, and the sealing member is sandwiched between the base material by the fixing tool that penetrates the base material. To seal. A substrate;
A sealing member made of an elastomer material;
An insertion portion provided on one of the base material or the seal member;
A receiving portion provided on the other side;
A protrusion provided on the substrate;
A hole provided in the seal member, the hole being a wedge-shaped hole whose cross section expands toward the outside of the seal member ;
The insertion portion and the receiving portion are fitted, the protrusion is inserted into the hole, and the top of the protrusion is caulked, so that the caulked and crushed protrusion fills the wedge-shaped space of the hole. In this way, the sealing member is sandwiched between the base members.

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