JP5174614B2 - Floor hinge - Google Patents

Description

  The present invention relates to a floor hinge embedded in the floor so that the lower end of the door is pivotally supported and biased in the closing direction of the door, and the upper surface is substantially flush with the floor surface.

Conventionally, a floor hinge is known as an example of a door closing device that is used so as to be embedded in a floor to support a lower part of a building door.
For example, the applicant of the present invention has applied for a floor hinge that prevents water from entering the casing of the floor hinge, does not contaminate the floor surface with overflowed water, and further eliminates the failure of the floor hinge due to freezing. (For example, refer to Patent Document 1 and Patent Document 2).
Japanese Patent No. 3654886 Japanese Patent Publication No. 3654887

  In the floor hinge described in Patent Document 1, the outer periphery of the rubber packing provided so as to directly cover the main body is bonded to the upper end flange portion of the outer peripheral wall of the casing by an adhesive layer, and on the upper surface of the main body near the bulging portion. The rubber packing prevents water from entering between the outer periphery and the upper end flange portion of the casing, and the cylindrical portion of the cap-shaped rubber packing and the shaft protruding from the main body. It is possible to prevent water that has entered from between the gaps from entering between the upper surface of the main body and the back surface of the rubber packing in the vicinity of the bulging portion and below the rubber packing.

  On the other hand, the casing has a mechanism that allows the position of the main body to be adjusted. Since it is placed on the upper surface and bonded by the adhesive layer, it is difficult for the main body to move by the position adjusting mechanism. In addition, when it is moved, it moves while sliding with respect to the adhesive layer of the rubber packing on the main body, so water may enter from a slight gap and the waterproof effect may be impaired. .

  The floor hinge disclosed in Patent Document 2 has two annular protrusions in which a cap-like rubber packing covering the outer peripheral surface of the lower end of the shaft protruding from the main body and the outer peripheral surface of the bulging portion is formed on the upper surface of the horizontal plate portion at the lower end. The strip portion will bite into the back surface of the rubber packing, and the adhesive layer on the back surface of the horizontal plate portion at the lower end overlaps and adheres to the upper surface of the main body. Water that has entered from between the upper end and the shaft can be prevented from entering further by adhering the back surface of the plate portion to the upper surface of the main body.

  On the other hand, the casing includes a mechanism that enables the position adjustment of the main body in the same manner as the floor hinge described in Patent Document 1. However, when the mechanism is operated, the casing moves along with the movement of the main body. The cap-shaped rubber packing is also movable, and depending on the amount of movement, a gap is formed between the two rubber packings, which may impair the waterproof effect.

  Therefore, the present invention solves such a problem, and even when the position adjusting mechanism in the casing is operated to move the main body and the shaft, a gap is generated between the main body and the packing. It is an object of the present invention to provide a floor hinge that does not impair the waterproofing effect.

In order to solve the above-mentioned problems, the floor hinge according to claim 1 of the present invention has a function of projecting the shaft portion pivotally supporting the lower end of the door upward and urging the door in the closing direction. In a floor hinge comprising a packing having a position adjustment mechanism for displacing the position of the shaft portion in the horizontal direction and having an opening at the upper end, and a packing directly covering the body.
The packing includes a base portion having substantially the same shape as the outer shape of the casing, a cylindrical portion whose inner surface is in contact with the outer peripheral surface of the shaft portion and displaced in the horizontal direction, and a boundary between the base portion and the cylindrical portion. The elastic part provided on the elastic part is integrally formed of elastic or elastic synthetic rubber or synthetic resin, and has an insertion hole having substantially the same shape as the elastic part, and is formed in substantially the same shape as the outer shape of the packing. A plate is mounted on the packing, the packing and the plate are fixed to the casing, and an expansion / contraction part is provided in an annular shape around the shaft part in a horizontal direction , and the cross-sectional shape is a wave shape. To do.

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In the invention relating to the floor hinge according to the first aspect, since the expansion / contraction part is provided at the boundary between the base part and the cylindrical part in the packing, the position of the door is attached by the position adjustment mechanism that displaces the shaft part position in the horizontal direction. Even when the position of the shaft portion with respect to is changed, the one stretchable portion located on the displacing side of the shaft portion shrinks, and the other stretchable portion at the position facing through the cylindrical portion stretches. It is possible to prevent water from entering the main body without causing a gap between the main body and the packing.
Moreover, since the cylindrical part with which the inner surface is in contact with the outer peripheral surface of the shaft part is provided, both the shaft part and the packing are in a sealed state, preventing water from entering between the two parts, Water entry is prevented. Furthermore, since these are integrally molded, it is possible to reliably prevent water from entering the main body.
In addition, compared with the conventional product, the packing according to the present invention has the effects of both the cap-shaped rubber packing and the sheet-shaped rubber packing around the shaft portion, so the number of parts can be reduced and the manufacturing cost can be reduced. Can be reduced.

In addition, since the expansion / contraction part is provided in an annular shape around the shaft part in a horizontal direction, the load at each displacement is made uniform regardless of the direction in which the position of the shaft part is displaced with respect to the door mounting position. Therefore, durability can be improved.
Moreover, since the cross-sectional shape in the expansion / contraction portion is a wave shape, it has excellent flexibility during expansion / contraction like bellows, and can be expanded / contracted without inadvertent deformation.

  Hereinafter, a floor hinge according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of each component in the floor hinge of the present invention. FIG. 2 is a front sectional view of the packing in the floor hinge of the present invention. FIG. 3 is a front sectional view of the floor hinge of the present invention. FIG. 4 is an enlarged front sectional view in the vicinity of the shaft portion of the floor hinge of the present invention. FIG. 5 is an enlarged front cross-sectional view of the vicinity of the shaft after the position of the shaft is adjusted in the floor hinge of the present invention.

  A floor hinge 1 according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a floor hinge 1 according to an embodiment of the present invention is provided with a main body 3 having a function of urging in the closing direction of a door, a lower end of the door being pivoted, and protruding at one end of the main body 3. A shaft 4 to be stored, a casing 2 for housing the body 3 so that the position of the body 3 can be adjusted, a packing 5 for preventing water from entering the body 3, a plate 6 serving as a lid for the casing 2, and a cap 7 attached to the shaft 4 Has been.

  The main body 3 and the casing 2 including the shaft portion 4 are substantially the same as conventional floor hinges, and the position of the shaft portion 4 relative to the door mounting position can be changed by a position adjusting mechanism (not shown). is there. Further, an upper end flange portion 2 a is formed at the upper end portion of the casing 2, and a screw hole 2 b for attaching the packing 5 and the plate 6 is provided.

  As shown in FIGS. 1 and 2, the packing 5 is made of, for example, nitrile rubber (NBR), synthetic rubber having elasticity or elasticity, or synthetic resin having elasticity or elasticity, and the like. A base portion 5a is formed in substantially the same shape as the outer shape of the portion 2a. Further, a cylindrical portion 5d is formed so as to protrude from one end portion of the base portion 5a and above the shaft portion 4, and the cylindrical portion 5d has substantially the same outer diameter as that of the shaft portion 4. A through hole 5e having a diameter is provided. Further, as shown in FIG. 4, a step portion 5 c is formed at the lower end portion of the cylindrical portion 5 d so as to follow the shape of the shaft step portion 4 a formed at the lower end portion of the shaft portion 4. That is, when the cylindrical portion 5 d in the packing 5 is attached to the shaft portion 4, the inner surface of the cylindrical portion 5 d comes into contact with the outer peripheral surface of the shaft portion 4. In addition, an expansion / contraction part 5b is formed outside the step part 5c and at the boundary with the base part 5a. The stretchable portion 5b is formed in an annular shape around the cylindrical portion 5d, and the cross section is formed in a wave shape. The base part 5a, the expansion / contraction part 5b, the step part 5c, and the cylindrical part 5d are integrally formed.

  Since the expansion / contraction part 5b is provided around the shaft part 4 in an annular shape, even when the position of the shaft part 4 with respect to the door mounting position is displaced in any direction, the load at each displacement is made uniform. This is preferable because durability can be improved. Moreover, since the cross-sectional shape in the said expansion-contraction part 5b was made into the wave shape, it has the outstanding softness | flexibility like a bellows at the time of expansion-contraction, and since it can expand-contract without inadvertent deformation | transformation, it is preferable.

  Of course, the shape of the expansion / contraction part 5b is not limited to an annular shape, but may be a triangular shape, a quadrangular shape, or other polygonal shapes. Further, the cross-sectional shape is not limited to the wave shape, and if the other stretchable part 5b opposed through the cylindrical part 5d is contracted by the extension of one stretchable part 5b. Well, the cross-sectional shape is not limited.

  Further, when the packing 5 is placed on the upper end flange portion 2 a of the casing 2, a through hole 5 f is provided at a location that coincides with the screw hole 2 b formed in the upper end flange portion 2 a.

  The plate 6 has a rust prevention effect such as stainless steel and is formed in substantially the same shape as the packing 5. In addition, an insertion hole 6a having substantially the same shape as the expansion / contraction part 5b in the packing 5 is formed at one end, and when the plate 6 is placed on the packing 5, a through hole is formed at a position that coincides with the through hole 5f. 6b is provided.

  The cap 7 has a rust-proofing effect such as stainless steel in the same manner as the plate 6, has an outer shape larger than the insertion hole 6 a in the plate 6, is bent into a substantially U-shaped cross section, and is inserted through the shaft portion 4. A through-hole 7a is provided.

  1, 3, and 4, these components are inserted into the through hole 5 e in the packing 5 and the insertion hole 6 a in the plate 6 through the shaft portion 4, and the packing is inserted into the upper end flange portion 2 a in the casing 2. 5 and the plate 6 are mounted and assembled by screwing. Further, a cap 7 is attached to the shaft portion 4 to improve the appearance and prevent inadvertent water entry. In the floor hinge 1 configured as described above, since the packing 5 having the through hole 5e having substantially the same diameter as the outer diameter is attached to the shaft portion 4, both the shaft portion 4 and the packing 5 are sealed. This prevents the water from entering through the gap between the two, and prevents water from entering the main body 3. Moreover, the sealing property in the outer peripheral wall of the casing 2 can also be improved by providing an adhesive layer in the upper end flange portion 2a.

Next, a state in which the position of the shaft portion 4 with respect to the door mounting position is changed by the position adjusting mechanism will be described with reference to FIGS. 4 and 5.
In the state of FIG. 5 in which the position of the shaft portion 4 in FIG. 4 is displaced in the X direction, the cylindrical portion 5d of the packing 5 is also displaced in the X direction in conjunction with the displacement of the shaft portion 4 in the X direction. At this time, since the circumference of the cylindrical portion 5d is formed by the stretchable portion 5b, one of the stretchable portions 5b (P portion in FIG. 5) located on the side displaced in the X direction contracts, and the cylindrical portion 5d The other expansion / contraction part 5b (Q part in FIG. 5) in the position which opposes via is extended. Further, since the cap 7 is also displaced in the X direction in conjunction with the displacement of the shaft portion 4, there is a possibility that water enters from the gap 8 between the plate 6 and the cap 7, but the packing 5 has the base portion 5 a and the expansion and contraction portion 5 b. Since the step portion 5c and the cylindrical portion 5d are integrally formed, there is no possibility that water enters the main body 3.

As mentioned above, according to the floor hinge 1 which concerns on the Example of this invention demonstrated, since the expansion-contraction part 5b is provided in the packing 5, when the position of the axial part 4 with respect to the attachment position of a door is changed by the position adjustment mechanism Even so, one expansion / contraction part 5b located on the side where the shaft part 4 is displaced contracts, and the other expansion / contraction part 5b at the position facing through the cylindrical part 5d extends, so the main body 3 and the packing 5 A gap is not generated between the main body 3 and the main body 3 can be prevented from entering. Furthermore, since the cylindrical portion 5d having a through hole 5e having substantially the same diameter as the outer diameter of the shaft portion 4 is provided in the packing 5, both the shaft portion 4 and the packing 5 are in a sealed state, and the gap between the two Water is prevented from entering the main body 3. By these, it is possible to reliably prevent water from entering the main body 3.
Compared with the conventional product, the integrally molded packing 5 according to the present invention has the effects of both the cap-shaped rubber packing and the sheet-shaped rubber packing around the shaft portion 4, thereby reducing the number of parts. Manufacturing cost can be reduced.

It is a perspective view of each component in the floor hinge of this invention. It is front sectional drawing of the packing in the floor hinge of this invention. It is front sectional drawing in the floor hinge of this invention. It is an expanded front sectional view of the shaft part suburbs in the floor hinge of the present invention. It is an expanded front sectional view of the vicinity of the shaft portion after adjusting the position of the shaft portion in the floor hinge of the present invention.

DESCRIPTION OF SYMBOLS 1 Floor hinge 2 Casing 2a Upper end flange part 2b Screw hole 3 Main body 4 Shaft part 4a Shaft step part 5 Packing 5a Base part 5b Expansion part 5c Step part 5d Cylindrical part 5e Through-hole 5f Through-hole 6 Plate 6a Insertion hole 6b Through-hole 7 Cap 7a Through hole 8 Gap

Claims (1)

The main body with a function of urging the door in the closing direction while projecting the shaft that pivotally supports the lower end of the door is provided with a position adjusting mechanism that horizontally displaces the position of the shaft, and an opening at the upper end. In a floor hinge having a packing that is housed in a casing and directly covering the body,
The packing is
A base portion having substantially the same shape as the outer shape of the casing;
A cylindrical part that is displaced in the horizontal direction by contacting the inner surface with the outer peripheral surface of the shaft part;
An extendable part provided at a boundary between the base part and the cylindrical part,
Molded integrally with elastic or elastic synthetic rubber or synthetic resin,
An insertion hole having substantially the same shape as the expansion and contraction part, and a plate formed in substantially the same shape as the outer shape of the packing are placed on the packing,
Fixing the packing and the plate to the casing;
A floor hinge characterized in that a telescopic part is provided in an annular shape around a shaft part in a horizontal direction , and the cross-sectional shape is a wave shape.

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