WO2013088839A1

WO2013088839A1 - Gasket

Info

Publication number: WO2013088839A1
Application number: PCT/JP2012/077002
Authority: WO
Inventors: 朝倉　大輔; 佳則菅原
Original assignee: 日産自動車株式会社
Priority date: 2011-12-13
Filing date: 2012-10-18
Publication date: 2013-06-20
Also published as: JP5862263B2; JP2013124684A

Abstract

This gasket, which is mounted to a mounting groove provided to one member from among two members that face each other, is provided with: a main body section having a size that is no greater than the width of the mounting groove; and a holding section that, separately from the main body section, holds the main body section at one member.

Description

gasket

The present invention relates to a gasket.

For example, in a housing etc. in which an electronic component such as a semiconductor device is housed, a concave main body having one opening and a lid closing the main opening are provided, and either the main opening edge or the lid outer peripheral edge A concave annular groove in which the gasket is fitted is provided on one side, and the lid is assembled to the main body with the gasket fitted in the annular groove, thereby sandwiching the gasket between the main body opening edge and the lid outer peripheral edge. The pressure is applied to crush the gasket to form a fluid-tight or airtight housing. In a gasket inserted into such a concave groove, when the gasket falls down, the fluid-tightness or airtightness performance of the housing is reduced.

In order to prevent this, JP2009-180283A discloses a gasket structure that prevents the falling of the gasket by providing a protrusion on both sides of the gasket facing the side of the groove and bringing the protrusion into contact with the side of the groove. ing.

In order to reliably prevent the gasket from falling down, the size of the protrusion on the side surface of the gasket must be larger than the dimension in the width direction of the groove, and the gasket must be pressed into the groove. That is, since the projections on both sides of the gasket are compressed and fitted into the grooves provided in one member of the case, it is difficult to mount the gasket in the grooves. For this reason, the projections may float without being crushed, and in particular, in the case of arranging the gasket in the member having the groove at the upper side, the gasket may fall off. In addition, when mounting the gasket in the groove, it is necessary to press the gasket into the groove while compressing the projections provided on both sides of the gasket, resulting in a problem of poor workability.

An object of the present invention is to provide a gasket having good workability at the time of mounting and capable of preventing falling down.

The gasket in one embodiment is a gasket mounted in a mounting groove provided in one of two members facing each other. The gasket includes a main body having a size equal to or less than the width of the mounting groove, and a holding portion which holds the main body on one of the members separately from the main body.

Embodiments of the present invention, advantages of the present invention, are described in detail below in conjunction with the attached drawings.

FIG. 1 is a top view showing the whole of the gasket in the first embodiment. FIG. 2 is a cross-sectional view showing a state in which the gasket in the first embodiment is sandwiched between the upper case and the lower case which are sealing members. FIG. 3 is a view of the upper case with the gasket attached, as viewed from the outside of the upper case. FIG. 4A is a view for explaining the depth width of the protrusion of the gasket and the snap-in guide, and shows the upper case and the lower case. FIG. 4B is a view for explaining the depth width of the protrusion of the gasket and the key guide, showing the gasket. FIG. 5 is a figure for demonstrating the force which acts on a gasket when inserting a gasket in the groove | channel of an upper case. FIG. 6 is a cross-sectional view showing a state in which the gasket in the second embodiment is sandwiched between the upper case and the lower case which are sealing members. FIG. 7A is a view for explaining the depth width of the protrusion and the key guide of the gasket in the second embodiment, and shows an upper case and a lower case. FIG. 7B is a view for explaining the depth width of the protrusion and the key guide of the gasket in the second embodiment, and shows the gasket. FIG. 8 is a view of the state before the gasket is inserted into the upper case, as viewed from the lower side of the gasket. FIG. 9 is a view of the state in which the gasket is inserted into the upper case as viewed from the lower case side. FIG. 10 is a view for explaining the force acting on the gasket when inserting the gasket into the groove of the upper case. FIG. 11 is a view of the upper case equipped with the gasket in the third embodiment as viewed from the outside of the upper case. FIG. 12 is a view of the state in which the gasket according to the fourth embodiment is inserted into the upper case, as viewed from the lower case side.

-First Embodiment-
FIG. 1 is a top view showing the whole of the gasket 1 in the first embodiment. FIG. 2 is a cross-sectional view showing a state in which the gasket 1 in the first embodiment is sandwiched between the upper case 2 and the lower case 3 as seal members (a view showing a cross section α-α shown in FIG. 3). is there. FIG. 3 is a view of the upper case 2 attached with the gasket 1 as viewed from the outside of the upper case.

The upper case 2 has a concave shape with one opening, and the lower case 3 serves as a lid that closes the opening of the upper case. The upper case 2 is provided with a concave annular groove at the body opening edge, and the lower case 3 is assembled in a state where the annular gasket 1 is attached to the annular groove, The gasket 1 is crushed with the outer peripheral edge of the lower case 3 to form a fluid-tight or airtight housing. In addition, the site | part shown with a broken line in FIG. 2 does not exist on cross-section (alpha)-(alpha) as described in FIG. 3, but shows the arrow view (beta) as described in FIG. There is. Further, in the other drawings (in FIG. 4A, FIG. 6, and FIG. 7A described later), similarly, portions which do not exist on the cross section are indicated by broken lines.

The gasket 1 has a main body portion 1a mounted in a mounting groove 2a provided in the upper case 2, a projection 1b projecting from the main body portion 1a to abut the outer peripheral surface of the mounting groove 2a, and an outer surface of the upper case 2 And a key guide 1d for connecting the main body 1a and the key 1c.

When mounting the gasket 1 on the upper case 2, the key 1 c of the gasket 1 is fixed so as to hook on the flange portion of the upper case 2. Subsequently, the main body portion 1 a is mounted in the mounting groove 2 a of the upper case 2 so that the upper case 2 is sandwiched between the insert 1 c and the projection 1 b of the gasket 1.

4A and 4B are diagrams for explaining the depth width of the protrusion 1b of the gasket 1 and the key guide 1d. FIG. 4A shows the upper case 2 and the lower case 3, and FIG. 4B shows the gasket 1.

As shown in FIG. 4A, the depth width of the mounting groove 2a of the upper case 2 is A, and the thickness of the outer wall located between the outer peripheral surface of the mounting groove 2a of the upper case 2 to the outer surface of the upper case 2 is B. Do. Also, as shown in FIG. 4B, assuming that the width of the main body portion 1a of the gasket 1 is C, and the length obtained by adding the width of the protrusion 1b to the depth width of the key guide 1d is D, the depth width F of the protrusion 1b Is set such that the relationship of the following equation (1) holds.
AC-F ≧ (AC) / 2 (1)

That is, the protrusion 1 b has a depth F equal to or less than the gap between the depth A of the mounting groove 2 a of the upper case 2 and the width C of the main body 1 a of the gasket 1. Further, since the widthwise dimension of the gasket 1 is smaller than the width of the mounting groove 2 a of the upper case 2, when the gasket 1 is mounted on the upper case 2, it is not necessary to press fit into the mounting groove 2 a.

Further, the length obtained by subtracting the width F of the protrusion 1b from the depth width D of the key guide 1d is set such that the relationship of the following equation (2) holds.
D−F ≦ B (2)

That is, in a state in which the gasket 1 is mounted on the upper case 2, the groove outer periphery of the upper case 2 is sandwiched between the projection 1 b of the gasket 1 and the key 1 c. This can prevent the gasket 1 from falling off the upper case 2.

FIG. 5 is a view for explaining the force acting on the gasket 1 when the gasket 1 is attached to the upper case 2.

When the gasket 1 is inserted into the mounting groove 2a of the upper case 2, a reaction force (F1) is generated due to the friction between the protrusion 1b and the outer peripheral surface of the mounting groove 2a. A rotational moment (F2) is generated around the contact point with 2a. However, since the gasket 1 holds the outer periphery of the groove of the upper case 2 with the projection 1b and the stator 1c, the rotational moment (F2) is offset with the tension (F3), and the gasket 1 at the time of insertion Fall down can be suppressed.

In addition, when the gasket 1 is attached to the upper case 2, the fitting 1 c of the gasket 1 comes out on the outer side of the upper case 2. Can. In particular, even after the lower case 3 is assembled to the upper case 2 and the opening of the upper case 2 is closed, it is easy to visually confirm the omission of attachment of the gasket 1 by looking at the outside of the upper case 2 Can. That is, if there is no key 1c when looking at the outer side of the upper case 2, it is assumed that the gasket 1 is forgotten even before or after the lower case 3 is assembled to the upper case 2 It can be judged.

As described above, the gasket 1 in the first embodiment is a gasket mounted in a mounting groove provided in one of two members (upper case 2 and lower case 3) facing each other, A main body portion 1a having a size equal to or less than a width, and a holding portion (protrusion portion 1b, a key 1c, and a key guide 1d) for holding the main body portion 1a in one member. Since the width of the main body portion 1a is equal to or less than the width of the mounting groove, there is no need to press-fit the main body portion 1a into the mounting groove when mounting the gasket 1. As a result, the workability at the time of mounting the gasket is good, and the falling of the gasket 1 can be prevented.

In particular, the holding portion is a first contact portion (protrusion portion 1b) which protrudes from the outer portion 1a and contacts the outer peripheral surface of the mounting groove, and a second contact portion which extends from the main portion 1a and contacts the outer surface of one member. The gasket main body is held in the mounting groove by sandwiching one of the members at the first contact portion and the second contact portion. Thereby, even if it does not press fit the main-body part 1a of the gasket 1 to a mounting groove, the gasket 1 can be hold | maintained to a mounting groove. In addition, since the second contact portion (placement 1c) contacts the outer surface of the outer case 2 which is one member, the lower case 3 is assembled to the upper case 2 by looking at the outer side of the upper case 2. Even before or after assembly, it is possible to easily visually check the omission of attachment of the gasket 1.

Usually, the upper case 2 occupies a large volume with respect to the protrusion for preventing falling. Therefore, it is difficult to prevent the inclination and falling of the gasket in the entire circumference of the upper case 2 with one protrusion. However, in the gasket 1 according to the first embodiment, the entire circumference of the upper case 2 is provided since the portions where the protrusion 1b, the lock 1c, and the lock guide 1d form one set are provided at a plurality of annular positions. In the above, it is possible to prevent the falling off of the gasket 1 while preventing the falling down of the gasket 1.

-Second embodiment-
FIG. 6 is a cross-sectional view showing a state in which the gasket 1A in the second embodiment is sandwiched between the upper case 2 and the lower case 3 as sealing members.

The gasket 1A according to the second embodiment includes a main body 1a mounted in the mounting groove 2a, a projection 1bb projecting from the main body 1a and in contact with the inner peripheral surface of the mounting groove 2a of the upper case 2; A cove 1c in contact with the outer surface 2 and a coup 1d connecting the main body 1a and the coe 1c are provided.

As shown in FIG. 6, in a state where the gasket 1A is inserted into the mounting groove 2a of the upper case 2, the projection 1bb abuts on the inner peripheral surface of the mounting groove 2a, and the outer peripheral surface of the mounting groove 2a and the main body of the gasket 1 It is not in contact with 1a.

FIGS. 7A and 7B are views for explaining the depth width of the protrusion 1bb and the key guide 1d of the gasket 1A in the second embodiment. FIG. 7A shows the upper case 2 and the lower case 3, and FIG. 7B shows the gasket 1A.

As shown in FIG. 7A, the depth width of the mounting groove 2a of the upper case 2 is A, and the thickness of the outer wall located between the outer peripheral surface of the mounting groove 2a of the upper case 2 to the outer surface of the upper case 2 is B. Do. Further, as shown in FIG. 7B, assuming that the width of the main body portion 1a of the gasket 1A is C and the depth width of the key guide 1d is D, the depth width F of the protrusion 1bb has the following relationship (3) To set.
F ≦ (A−C) (3)

That is, since the widthwise dimension including the main portion 1a and the projection 1bb of the gasket 1A is smaller than the width of the mounting groove 2a of the upper case 2, it is not necessary to press fit the gasket 1A into the mounting groove 2a when mounting the gasket. .

FIG. 8 is a view for explaining the relationship between the width G of the key guide 1 d of the gasket 1 A and the width H of the key guide groove 2 b of the upper case 2. The key guide groove 2 b is a groove which communicates with the mounting groove 2 a and extends in the outer peripheral direction of the upper case 2. The width G of the key guide 1d is the width in the short direction perpendicular to the longitudinal direction of the key guide 1d, and the width H of the key guide groove 2b is the width G of the key guide 1d. The width of the direction corresponding to The width G of the key guide 1d and the width H of the key guide groove 2b have the following relationship (4).
H ≦ G (4)

That is, when attaching the gasket 1A to the upper case 2, it is necessary to press-fit the key guide 1d into the key guide groove 2b. By pressing the key guide 1d into the key guide groove 2b, it is possible to prevent the gasket 1A from falling off the upper case 2.

FIG. 9 is a view of the state in which the gasket 1A is inserted into the upper case 2 as viewed from the lower case 3 side, that is, a view as viewed in the direction of the arrow Y1 of FIG. As described above, the key guide 1d of the gasket 1A is press-fit into the key guide groove 2b.

FIG. 10 is a view for explaining the force acting on the gasket 1A when the gasket 1A is inserted into the mounting groove 2a of the upper case 2. As shown in FIG.

When inserting the gasket 1A into the mounting groove 2a, the mounting groove 2a of the upper case 2 is pulled while pulling the gasket 1A in the inward direction of the upper case 2 with the key 1c in contact with the outer surface of the upper case 2. Push in (arrow Y2). At this time, the key guide 1d of the gasket 1A is press-fit (inserted with a filling rate of 100% or more) into the key guide groove 2b of the upper case 2 (see FIG. 9). Accordingly, since the gasket 1A is held by the friction between the guide 1d of the gasket 1A and the guide groove 2b, the gasket 1A does not come off the upper case 2.

When assembling the gasket 1A, a reaction force (F4) is generated due to the friction between the projection 1bb of the gasket 1A and the inner wall of the mounting groove 2a, and a rotational moment (F5) is generated in the gasket 1A. However, since the key guide 1d is press-fit into the key guide groove 2b, a reaction force (F6) is generated by the frictional force between the key guide 1d and the key guide groove 2b, causing the gasket 1A to fall. It can be suppressed.

As described above, according to the gasket 1A in the second embodiment, the width of the main body portion 1a is equal to or less than the width of the mounting groove 2a, as in the gasket 1 in the first embodiment. There is no need to press-fit the main body portion 1a into the mounting groove 2a. As a result, the workability at the time of mounting the gasket is good, and the falling of the gasket 1 can be prevented.

The upper case 2 which is one member has a groove 2b communicating with the mounting groove 2a and extending in the outer peripheral direction of the upper case 2. The gasket 1A extends from the main body 1a. It is a press-fit part (placement guide 1d) which is press-fitted into the groove part 2b of this. Thus, the gasket 1A can be held in the mounting groove 2a without pressing the main body portion 1a of the gasket 1A into the mounting groove 2a.

-Third embodiment-
FIG. 11 is a view of the upper case 2 on which the gasket 1B according to the third embodiment is mounted, viewed from the outside of the upper case 2. In the gasket 1B of the third embodiment, the length of the retainer 1cc (length in the vertical direction in the figure) in the direction opposite to the direction in which the gasket 1B is attached to the upper case 2 is the gasket 1 of the first embodiment. Longer than the length of peg 1c. Specifically, the fitting 1cc extends in the direction opposite to the direction in which the gasket 1B is attached to the upper case 2 and covers the flange portion of the upper case 2 when attached to the upper case 2. As a result, the mousse 1cc acts as a protective wall that prevents direct contact to the seal site against water spouting from the outside.

-Fourth Embodiment-
FIG. 12 is a view of the state in which the gasket 1C in the fourth embodiment is inserted into the upper case 2 as viewed from the lower case 3 side. In the gasket 1C according to the fourth embodiment, as shown in FIG. 12, the core guide comprises a wide portion 1d1 and a narrow portion 1d2.

The wide portion 1d1 is connected to the fitting 1c and has the same width as the fitting guide 1d of the gasket 1A in the second embodiment. The narrow portion 1d2 is not in contact with the key guide groove 2b in a state where the gasket 1C is mounted on the upper case 2, but a projection 1e which protrudes in the width direction to a portion near the main body 1a of the gasket 1C. Have.

The width of the protrusion 1 e is substantially the same as the width of the wide portion 1 d 1. Therefore, when inserting the gasket 1 C into the upper case 2, press-fit the wide portion 1 d 1 of the key guide and the projection 1 e into the key guide groove 2 b of the upper case 2 (with a filling rate of 100% or more insert. This can prevent the gasket 1C from falling off the upper case 2.

Also, when inserting the gasket 1C into the upper case 2, instead of press fitting the entire guide into the guide groove 2b of the upper case 2, the wide portion 1d1 of the key guide and the protrusion 1e are pressed in As a result, compared to the gasket 1A in the second embodiment, it is easy to press-fit the key guide and to attach the gasket to the upper case 2.

In addition, it is possible to configure only the narrow portion 1d2 without providing the wide portion 1d1 as the key guide. In this case, the gasket 1C is held on the upper case 2 by the projection 1e provided at the narrow portion 1d2.

The present invention is not limited to the embodiments described above. For example, although the gasket 1 in the first embodiment has been described as an annular shape (see FIG. 1), it is not limited to the annular shape. Further, FIG. 1 shows a configuration in which the portion where the protrusion 1b, the fitting 1c, and the fitting guide 1d form one set is provided at eight annular locations, the setting location and the number of settings are as follows: The design can be changed as appropriate.

The present application claims priority based on Japanese Patent Application No. 2011-272140 filed on Dec. 13, 2011, to the Japanese Patent Office, and the entire contents of this application are incorporated herein by reference.

Claims

A gasket mounted in a mounting groove provided in one of two members facing each other,
A main body having a size equal to or less than the width of the mounting groove;
Separately from the main body portion, a holding portion for holding the main body portion on the one member;
With a gasket.
The holding portion includes a first contact portion which protrudes from the main portion and contacts the outer peripheral surface of the mounting groove, and a second contact portion which extends from the main body and contacts the outer surface of the one member. Holding the main body portion in the mounting groove by sandwiching the one member by the first contact portion and the second contact portion;
The gasket according to claim 1.
The one member has a groove portion communicating with the mounting groove and extending in the outer peripheral direction of the one member,
The holding portion is a press-fit portion that extends from the main body portion and is press-fit into the groove portion of the one member.
The gasket according to claim 1.
The one member has a groove portion communicating with the mounting groove and extending in the outer peripheral direction of the one member,
The holding portion is a protrusion pressed into a portion of the groove of the one member.
The gasket according to claim 1.
It further comprises a lever extending in a direction opposite to the mounting direction of the mounting groove of the one member,
The gasket according to any one of claims 1 to 4.