Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal between parts of internal combustion engine
Reexamination Certificate
1998-10-20
2001-07-10
Browne, Lynne H. (Department: 3626)
Seal for a joint or juncture
Seal between fixed parts or static contact against...
Contact seal between parts of internal combustion engine
C277S598000, C277S609000
Reexamination Certificate
active
06257592
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a packing provided between a seal end side and a mounting side and to a mounting structure of the packing to be mounted to the seal end side.
2. Description of the Related Art
An annular packing provided between a seal end surface and a mounting surface to which the seal end surface is joined is accommodated in a packing accommodating groove provided to the seal end surface with a seal surface of the packing being projected longer than the seal end surface by a predetermined height.
When the seal end surface is joined to the mounting surface, the packing is held between the seal end surface and the mounting surface under the pressure to closely contact with the mounting surface, and thus the seal end surface and the mounting surface are sealed.
However, only when the packing is accommodated in the packing accommodating groove, an engagement force of the packing with the packing accommodating groove is weak, the packing has a problem such that so at the time of the process of joining the seal end surface to the mounting surface, it is removed from the packing accommodating groove unexpectedly.
Therefore, there have been suggested a packing in which an engagement projection is provided to one side of a rectangular and annular packing body and a hemispheric head section provided to the tip of the engagement projection is engaged with an engagement hole of a housing (see Japanese Utility Model Application Laid-Open No. 5-17956 (1993)), and a packing in which a projection is protruded from a packing body and it is inserted into a mounting hole provided to a housing so that the packing is mounted to the housing.
In such a manner, when an engagement projection is engaged with an engagement hole and a projection is inserted into a mounting hole, unexpected removal, moving and coming-out of the packing are prevented, and when the packing is located in a normal position, secure water resistance can be obtained.
However, in the case where when the packing is mounted to the seal end surface, the engagement projection is engaged with the engagement hole and the projection is inserted into the mounting hole, after the engagement projection is located in the engagement hole and the projection is located in the mounting hole, the packing should be pressed. For this reason, the mounting operation of the packing requires a lot of time, and thus the mounting workability is not good.
In addition, in the case where the packing is removed from the seal end surface at the time of maintenance or the like, it take much time to pull out the engagement projection from the engagement hole or to pull out the projection from the mounting hole, so there arises a problem that removing workability is not good.
Further, in the case where a working space for mounting the packing to the seal end surface is narrow, it becomes more complicated to mount and remove the packing.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a packing and a mounting structure thereof in which mounting and removal works are easy.
To achieve the object, from a first aspect of the invention, there is provided a packing which comprises a packing body to be accommodated in a packing accommodating groove provided on a seal end side in one side of a case; and a mounting projection which is provided integrally on the packing body and is protruded from the packing body. The mounting projection has a hook pin hole for a hook pin projected from a rear side of the seal end side of the case to be inserted therein; and an engagement hole being closer to a tip then the hook pin hole and for a fixing assistant tool for pulling the mounting projection to be inserted therein. Thereby the seal end side and a mounting side to be joined to the seal end side are sealed with the packing.
In the case where this packing is mounted to the seal end side, the packing body is inserted into the packing accommodating groove on the seal end side, a pulling tool is inserted into the pulling tool hole on the mounting projection so as to be pulled, and the hook pin on the rear side of the seal end side is inserted into the hook pin hole. Next, in the case where the packing is removed from the seal end side, the fixing assistant tool is inserted into the engagement hole and pulls the mounting projection to pull out the hook pin from the hook pin hole, and the packing body is removed from the packing accommodating groove.
In this case, the mounting and removal of the packing can be carried out easily by inserting the fixing assistant tool into the engagement hole provided in the mounting projection, and inserting/removing the hook pin into/from the hook pin hole. Further, even if the mounting work space is narrow, the mounting and removal of the packing can be carried out easily by inserting the fixing assistant tool into the engagement hole on the mounting projection and operating the fixing assistant tool.
In a more preferable embodiment, a plurality of the mounting projections are provided in a circumferential direction of the packing body.
In his packing, since a plurality of the mounting projections are provided in the circumferential direction of the packing body, the packing can be mounted to the seal end side firmly.
From a second aspect of the invention, there is provided a mounting structure of a packing, which comprises equipment having a mounting side; a case which has a seal end side to be joined to the mounting side of the equipment and has a rear side of the seal end side, has a packing accommodating groove on the seal end side, and has on the rear side a mounting concave section communicating with the packing accommodating groove; a hook pin projected from an inner wall in the mounting concave section; a packing body accommodated in the packing accommodating groove and for sealing the mounting side of the equipment and the seal end side of the case; and a mounting projection which is provided integrally on the packing body, is protruded towards the mounting concave section, and has a hook pin hole for the hook pin to be inserted therein and for the packing body to be mounted to the seal end side; and an engagement hole being closer to a tip than the hook pin hole and for a fixing assistant tool to be inserted therein. The mounting projection is pulled towards the book pin hole to insert the hook pin into the hook pin hole by applying the fixing assistant tool.
In this mounting structure of the packing, the packing body is accommodated in the packing accommodating groove on the seal end side, and the mounting projection is protruded towards the mounting concave section on the rear side of the seal end side. Next, the fixing assistant tool is inserted into the engagement hole on the mounting projection and is pulled so that the hook pin is inserted into the hook pin hole on the mounting projection. As a result, the packing is mounted to the seal end side. Moreover, in the case where the packing is removed from the seal end side, the hook pin is pulled out of the hook pin hole on the mounting projection by inserting the fixing assistant tool into the engagement hole on the mounting projection and pulling the fixing assistant tool so that the packing body is removed from the packing accommodating groove.
In this case, the fixing assistant tool is inserted into the engagement hole provided on the mounting projection, and the hook pin is inserted into or removed from the hook pin hole so that the mounting and removal of the packing can be carried out easily. Further, even if the mounting work space is narrow, the fixing assistant tool is inserted into the engagement hole on the mounting projection and the fixing assistant tool is operated so that the mounting and removal of the packing can be carried out easily.
From a third aspect of the invention, there is provided a mounting structure of a packing. The mounting structure comprises a case having one side and another side communicating with the one side, a pin projected from the another side,
Hashizawa Shigemi
Masuda Yutaka
Browne Lynne H.
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Williams Mark
Yazaki -Corporation
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