JP4819627B2 - Seal structure - Google Patents

Description

  The present invention relates to a seal structure of an opening covered with a lid.

When sealing the opening of the hole covered with the lid, a seal member is disposed along the opening at the periphery of the opening, and sealing is performed by pressing the lid against the opening.
As a method of pressing the lid against the opening, there are fixing with a bolt, adhesion, welding (ultrasonic welding, laser welding, etc.) (for example, see Patent Document 1).
Japanese Patent No. 2652911 (FIGS. 3 to 6)

However, the method of pressing the lid against the opening using a bolt is fixing the pole part, and there is a problem that it is difficult to hold the lid uniformly and the seal is not uniform.
Also, the method of pressing the lid against the opening by bonding, welding, or the like has a problem that it cannot be removed once the lid is attached.

This invention is made | formed in view of the said problem, The subject is providing the seal structure from which a uniform seal | sticker is obtained.
It is another object of the present invention to provide a seal structure in which a lid can be removed.

  According to a first aspect of the present invention, in the sealing structure in which the opening of the hole is covered with a lid, the elastic sealing member provided along the opening so as to protrude from the surface in which the opening is formed, and the sealing member A first cover that is set in a covering shape and is placed on the seal member; a second cover that is stacked on the first cover; and a layer that is provided around the opening and stacked on the first cover. A lid fixing portion having a lid abutting surface with which a surface opposite to the surface facing the first lid of the second lid can abut, and the thickness of the seal member and the thickness of the first lid The thickness of the second lid and the distance between the lid abutting surface of the lid fixing portion and the surface provided with the seal member are set so that the second lid presses against the lid abutting surface of the lid fixing portion. It is a seal structure characterized by being set so that it may touch.

First, the first lid is placed so as to cover the seal member.
Next, in a state where the first lid is pushed in the surface direction where the seal member is provided, the second lid is laminated on the first lid. When the lamination is completed, the first lid is provided with the seal member. Release pressing in the direction of the surface.

  Then, the second lid presses against the lid contact surface of the lid fixing portion and pushes the first lid toward the seal member. Then, the seal member is pushed through the first lid, the seal member is elastically deformed, and is in close contact with the first lid and the periphery of the opening, and the opening of the hole is sealed.

  According to a second aspect of the present invention, the lid fixing portion is a standing wall formed around the opening, the lid contact surface is formed along an inner wall surface of the standing wall, and the opening is formed. 2. The seal structure according to claim 1, wherein the seal structure is a surface on the surface side where the opening of the bent portion that faces the surface and extends from the inner wall surface toward the center of the hole is formed.

  In the invention according to claim 3, the hole includes a large hole portion on the opening side and a small hole portion provided continuously to the large hole portion, and a step portion between the large hole portion and the small hole portion includes: In a state where the seal member is disposed and the first lid and the second lid are not provided, the seal member is set to a shape protruding from the surface on which the opening is formed. The seal structure according to claim 2.

  The invention according to claim 4 is the seal structure according to claim 3, wherein a seal holding surface is formed on the first lid so as to face the inner wall surface of the large hole portion with a space therebetween. .

  According to the first to fourth aspects of the invention, the first lid is pushed by the second lid. That is, the first lid is pushed by the surface. Therefore, the seal member and the first lid are in close contact with each other, and a uniform seal is obtained. If the first lid is pressed in the direction in which the seal member is pressed, the second lid and the lid abutting surface of the lid fixing portion are not pressed against each other, and the second lid can be removed.

  According to the second aspect of the present invention, since the lid fixing portion having the lid abutting surface is formed around the opening, the abutting area between the lid abutting surface and the second lid is wide. Therefore, even if a large pressure acts on the first lid, the pressure per unit area acting on the lid abutting surface (lid fixing portion) is reduced, and the lid fixing portion is not damaged.

  According to the invention of claim 3, the hole includes a large hole portion on the opening side and a small hole portion provided continuously to the large hole portion, and is provided at a step portion between the large hole portion and the small hole portion. Since the seal member is disposed, the seal member is reliably positioned.

  According to the fourth aspect of the present invention, the first lid is formed with the seal holding surface that faces the inner wall surface of the large hole portion with a space therebetween, so that the sealing member can be positioned reliably. .

Next, embodiments of the present invention will be described with reference to the drawings. In this embodiment, the door check device 351 having the seal structure of the present invention will be described.
First, as shown in FIG. 7 which is an exploded perspective view around a door provided with a door check device, the door 300 is rotatably attached to the body 305 using an upper hinge 301 and a lower hinge 303. A door check device 351 is provided on the upper hinge 301 side.

  As shown in FIG. 8, which is an enlarged view of the upper hinge portion of FIG. 7, the upper hinge 301 includes a hinge female 311 whose base end side is attached to the body 305 side, and a hinge mail whose base end side is attached to the door 300 side. 313 and a hinge pin hole 311a provided on the front end side of the hinge mail 311 and fixedly fitted into a hinge pin hole 313a provided on the front end side of the hinge mail 313. A hinge pin 315 that relatively rotates integrally with the hinge female 311 is formed. A door check device 351 is attached to the lower portion of the hinge mail 313 on the door 300 side, and the shaft 69 of the door check device 351 is coupled to the hinge pin 315 so that the hinge pin 315 and the shaft 69 rotate integrally. Yes.

Next, the door check device 351 will be described with reference to FIGS. 1 to 3 are exploded perspective views of the door check device, and FIG. 4 is an external view of the door check device.
In these drawings, a bottomed hole 5 having an opening 3 at the top is formed in the casing 1 of the door check device 351.

  Further, a shaft 13 provided with a flap 11 is disposed in the hole 5. A hole (not shown) in which the lower end of the shaft 13 is rotatably fitted is provided at the bottom of the hole 5. A liquid such as silicone oil is provided in the hole 5.

The opening 3 of the hole 5 is closed by the first lid 21 and the second lid 31, and the shaft 13 protrudes to the outside through the holes 23 and 33 formed in the first lid 21 and the second lid 31. Yes.
The flap 11 divides the inside of the hole 5 into two chambers, a first chamber and a second chamber. The flap 11 is provided with two one-way valves. This one-way valve is a valve in which the valve body is held with a large force in the closed position, and the force for holding the valve body decreases when the valve body moves in the opening direction. Of the two one-way valves, one one-way valve permits the flow of liquid from the first chamber to the second chamber and prohibits the flow of liquid from the second chamber to the first chamber. Is provided. The other one-way valve is provided to permit the flow of liquid from the second chamber to the first chamber and prohibit the flow of liquid from the first chamber to the second chamber.

  Therefore, when the door (shaft 13) 300 tries to rotate, the valve body of one of the two one-way valves provided on the flap 11 moves from the closed position to the open position, The flow of liquid between the second chambers becomes free, and the door 300 rotates. At this time, the valve body of the other one-way valve does not move and remains closed.

  The valve body of the one-way valve is held with a large force in the closed position, and when moving in the opening direction, the force for holding the valve body is reduced, so a large force is required when opening and closing the door 300, Once the door 300 starts moving, the door 300 can be opened and closed with a small force. For this reason, the door 300 can be stopped at an arbitrary position.

Next, a seal structure in which the opening 3 of the hole 5 is covered with the first lid 21 and the second lid 31 will be described with reference to FIGS.
As shown in FIGS. 5 and 6, the hole 5 is composed of a large hole portion 5a on the opening 3 side and a small hole portion 5b connected to the large hole portion 5a, and a step between the large hole portion 5a and the small hole portion 5b. An annular and elastic sealing member (for example, an O-ring) 41 is disposed along the opening 3 in the portion 5c. In the natural state, the seal member 41 is set in a shape protruding from the surface 4 provided with the opening 3 (see FIG. 6).

The first lid 21 is set in a shape that covers the annular seal member 41 and is placed on the seal member 41. The second lid 31 is stacked on the first lid 21.
As shown in FIG. 1 to FIG. 3, a lid on which the surface opposite to the surface facing the first lid 21 of the second lid 31 stacked on the first lid 21 can contact around the opening 3. A lid fixing portion having a contact surface is formed. In this embodiment, a standing wall 51 is formed on the plane 4 along the opening 3. This standing wall 51 is a lid fixing portion. A part of the standing wall 51 is cut off, and the cut-off portion is a lid insertion portion 55 into which the first lid 21 and the second lid 31 can be inserted.

  As shown in FIG. 5 and FIG. 6, the upper part of the standing wall 51 is bent along the inner wall surface so as to face the surface 4 in which the opening 3 is formed and extend from the inner wall surface toward the center of the hole 5. A portion 53 is formed. And the surface by the side of the surface 4 in which the opening 3 of the bending part 53 was formed becomes the lid | cover contact surface 53a.

  The thickness of the seal member 41, the thickness of the first lid 21, the thickness of the second lid 31, and the surface on which the lid contact surface 53a of the lid fixing portion and the seal member 41 are provided (in this embodiment, a stepped portion) 5c) is set such that the second lid 31 is pressed against the lid contact surface 53a of the lid fixing portion.

  As shown in FIGS. 1 to 3, the shape of the hole 23 of the first lid 21 through which the shaft 13 is inserted and the shape of the hole 33 of the second lid 31 are such that the shaft 13 can be inserted from the periphery of the lid. It is a long hole extending from the center toward the center.

  For this reason, a hole closing member 61 is provided to close a portion other than the portion occupied by the shaft 13 of the hole 23 and the hole 33. The hole closing member 61 is a main body that closes a portion other than the protrusion 61 a fitted in the groove 23 a formed in the inner wall surface of the hole 23 of the first lid 21 and the portion occupied by the shaft 13 of the hole 23 and the hole 33. Part 61b.

As shown in FIGS. 1 to 3, 5, and 6, the first lid 21 is formed with a seal holding surface 21 a that is opposed to the inner wall surface of the large hole portion 5 a with a gap.
Next, assembly of the door check device having the above configuration will be described.
(1) The shaft 13 provided with the flap 11 is inserted into the hole 5 of the casing 1, and the lower end of the shaft 13 is fitted into the hole formed at the bottom of the hole 5.
(2) With the lid closing member 61 held on the opening 3, the first lid 21 is inserted from the lid insertion portion 55 along a plane parallel to the surface 4, and the lid closing member 61 and the first The sealing member 41 is placed so as to cover the lid 21. At this time, the upper portion of the shaft 13 is also held by the lid closing member 61 and the first lid 21.
(3) The first lid 21 is pushed in the surface 4 direction. In this state, the second lid 31 is inserted from the lid insertion portion 55 along a plane parallel to the plane 4, and the second lid 31 is stacked on the first lid 21. When the stacking is completed, pressing the first lid 21 in the direction of the surface 4 is released.

  Then, the second lid 31 presses against the lid contact surface 53a of the standing wall 51 and pushes the first lid 21 toward the seal member 41. Then, the seal member 41 is pushed through the first lid 21, the seal member 41 is elastically deformed, and is in close contact with the first lid 21 and the stepped portion 5 c that is the periphery of the opening 3, thereby sealing the opening 3 of the hole 5. Is done.

According to the above configuration, the following effects can be obtained.
(1) The first lid 21 is pushed by the second lid 31. That is, the first lid 21 is pushed by the surface. Therefore, the seal member 41 and the first lid 21 are in close contact with each other, and a uniform seal is obtained.
(2) If the first lid 21 is pushed in the direction in which the seal member 41 is pushed, the second lid 31 and the lid abutting surface 53a of the standing wall 51 are not pushed and the second lid 31 can be removed.
(3) Since the standing wall 51 having the lid contact surface 53a is formed around the opening 3, the contact area between the lid contact surface 53a and the second lid 31 is large. Therefore, even if a large pressure acts on the first lid 21, the pressure per unit area acting on the lid abutting surface (lid fixing portion) 53 a becomes small, and the standing wall 51 is not damaged.
(4) The hole 5 includes a large hole portion a on the opening side and a small hole portion 5b provided continuously to the large hole portion 5a, and a step member 5c between the large hole portion 5a and the small hole portion 5b includes a seal member. By positioning 41, the sealing member 41 is positioned reliably.
(5) The first lid 21 is formed with the seal holding surface 21a that is opposed to the inner wall surface of the large hole portion 5a with a space therebetween, so that the seal member 41 is reliably positioned.

It is a disassembled perspective view of the door check apparatus which has the seal structure of an example. It is a disassembled perspective view of the door check apparatus seen from the direction different from FIG. It is a disassembled perspective view of the door check apparatus seen from the direction different from FIG. 1, FIG. It is an external view of the door check apparatus of FIG. FIG. 5 is a cross-sectional view taken along a cutting line AA in FIG. 4. In FIG. 5, it is sectional drawing of a state without a 1st cover and a 2nd cover. It is a disassembled perspective view around the door provided with the door check device. It is the figure which expanded the upper hinge part of FIG.

Explanation of symbols

3 Opening 21 First lid 31 Second lid 41 Seal member 51 Standing wall (lid fixing part)
53a Lid contact surface

Claims (4)

In the seal structure that covers the opening of the hole with a lid,
An elastic seal member provided along the opening so as to protrude from the surface on which the opening is formed;
A first cover that is set in a shape that covers the seal member and is placed on the seal member;
A second lid laminated on the first lid;
A lid fixing portion having a lid abutting surface provided around the opening and capable of abutting a surface opposite to the surface facing the first lid of the second lid laminated on the first lid;
Consists of
The thickness of the seal member, the thickness of the first lid, the thickness of the second lid, and the distance between the lid contact surface of the lid fixing portion and the surface on which the seal member is provided are the second A seal structure characterized in that a lid is set so as to be pressed against a lid contact surface of the lid fixing portion. The lid fixing portion is a standing wall formed around the opening,
The lid abutting surface is formed along the inner wall surface of the standing wall, is opposed to the surface where the opening is formed, and the opening of the bent portion extending from the inner wall surface toward the center of the hole is formed. The seal structure according to claim 1, wherein the seal structure is a formed surface side surface. The hole is composed of a large hole portion on the opening side and a small hole portion provided continuously to the large hole portion,
In the step between the large hole and the small hole, the seal member is disposed,
3. The seal structure according to claim 2, wherein in a state where the first lid and the second lid are not provided, the seal member is set in a shape protruding from a surface on which the opening is formed. . In the first lid,
The seal structure according to claim 3, wherein a seal holding surface is formed to face the inner wall surface of the large hole portion with a space therebetween.

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