JPH04127460U - Seal O-ring groove - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a sealing O-ring groove that can prevent the O-ring from falling off. [Structure] A groove formed in a member to be sealed into which a sealing O-ring 4 is fitted, and the width of the opening gradually increases in the depth direction.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is designed to prevent the O-ring from falling off, especially the groove of the seal O-ring. This relates to the O-ring groove.

0002

[Conventional technology]

Generally, O-rings made from nitrile rubber etc. are used for connections that require airtightness or liquidtightness. Used between contact surfaces to prevent liquid or gas from leaking through the contact surfaces. have. As shown in FIG. 3, the O-ring described above allows the sliding rod 1 and cylinder 2 to be In order to prevent liquid and gas leakage between the cylinder 2 and the 3 is formed, and an O-ring 4 is fitted into the groove 3 with a part thereof protruding outside the groove 3. The part of the O-ring 4 that protrudes outside the groove 3 is removed when the sliding rod 1 is fitted into the cylinder 2. When inserted, it is crushed, thereby making the sliding rod 1 and cylinder 2 liquid-tight and air-tight. will be sealed.

0003

[Problem that the idea aims to solve]

However, the conventional sealing O-ring groove described above has the following problems. has a problem. Since the conventional O-ring groove 3 is formed in a rectangular shape, that is, the opening of the groove 3 Since the width of is the same across the depth direction of the groove 3, the O-ring 4 is fitted into the groove 3. After that, while fitting the sliding rod 1 into the cylinder 2, the O-ring 4 is pulled out from the groove 3. Easy to get out. This phenomenon is remarkable when the diameter of the O-ring 4 is large. Even after the sliding rod 1 is installed in the cylinder 2, the O-ring 4 remains in the groove 3. The O-ring 4 that protrudes from the groove 3 gets caught in the cylinder 2. There is a risk that the O-ring 4 may be broken.

0004 Therefore, the purpose of this invention was to create a groove in the sealing O-ring that would prevent the O-ring from falling off. It is about providing.

[0005] In this design, the width of the opening gradually widens in the depth direction, like a dovetail groove. , thus, it is characterized in that it prevents the O-ring from falling off.

[0006] Next, one embodiment of the sealing O-ring groove of this invention will be explained with reference to the drawings. explain. FIG. 1 is a sectional view showing one embodiment of the groove of the sealing O-ring of this invention. . As shown in Fig. 1, the groove 5 of the sealing O-ring of this invention is formed in a dovetail shape. It is. The groove 5 formed in a dovetail shape has an opening width extending in the depth direction of the groove 5. As it gradually widens, the O-ring 4 fitted into the groove 5 will not come out from within the groove 5. Hateful.

[0007] Therefore, for example, the above-mentioned O-ring groove 5 of this invention can be used as shown in FIG. When formed on the rod sliding surface of cylinder 2, the sliding rod 1 can be placed inside the cylinder 2. The O-ring 4 will not come out of the groove 5 during fitting. follow Therefore, in the case of a large cylinder 2, it is easy to fit the O-ring 4 into the groove 5. can be done. Also, since the O-ring 4 becomes difficult to come out of the groove 5, The O-ring 4 that came out got stuck in the cylinder 2 and caused the O-ring 4 to break. There will be no fear.

[0008] FIG. 2 shows another O-ring groove 6 of this invention. This groove 6 has an opening width of 6 The groove gradually expands in the depth direction, but one side is perpendicular to the groove 6. There is. Even with such a shaped groove 6, the same effect as the above-mentioned dovetail groove 5 can be obtained. can get.

[0009]

[Effect of the idea] As explained above, according to this invention, the width of the opening is gradually increased in the depth direction of the groove. By widening it, you can reliably prevent the O-ring from falling off. Useful effects are produced.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of a groove of a sealing O-ring according to the present invention.

FIG. 2 is a sectional view showing another embodiment of the groove of the sealing O-ring according to the present invention.

[Figure 3] O provided between the sliding rod and the cylinder
It is a sectional view showing a ring.

[Explanation of symbols]

1: Rod, 2: cylinder, 3: Conventional groove, 4: Groove of one embodiment of this invention, 5: Groove of another embodiment of this invention.

Claims (2)

[Scope of utility model registration request] Claim 1: A sealing O formed on a member to be sealed.
A groove for a sealing O-ring, which is a groove for fitting a ring, and is characterized in that the width of the opening gradually increases in the depth direction, thus preventing the O-ring from falling off. [Claim 2] A sealing O formed on the member to be sealed.
A groove for a sealing O-ring, which is a groove into which a ring is fitted, and the width of the opening extends in a dovetail-like manner in the depth direction, thus preventing the O-ring from falling off. .