JP2002286139A - Waterproofing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproofing apparatus capable of securing air-tightness of a sealed space. SOLUTION: The waterproofing apparatus is composed of a waterproof box including a base part around which riser parts are installed upright so as to form a box shape with one side left open, a resilient member 3 installed at the bottom surface 12e of a groove provided circulating at the forefront face of the riser parts of the box, and a head 2 having an opening on one side and forming a sealed space internally together with the box by structuring so that an open edge is arranged in the groove in the box in such a way as pinching the resilient member 3 and is fixed to the riser parts, wherein the groove is furnished at the bottom surface 12e with a projection 12f protruding toward the resilient member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof device such as a waterproof sensor.

[0002]

2. Description of the Related Art As a first conventional example of this type of waterproofing equipment,
The one shown in FIGS. 12 and 13 exists. This one is
A waterproof box 101 having a standing portion 101b erected around a base 101a so as to form a box shape with one opening, and a standing portion 101b of the waterproof box 101.
(Elastic member) 102 disposed on the bottom surface of a groove 101c provided around the front end surface of the
a waterproof box 1 having a
An opening edge portion is provided in the groove portion 101c of FIG. 01, and a head 103 is provided which forms a sealed space together with the waterproof box 101 by tightening the packing 102 by being screwed and fixed to the standing portion 101b.

FIGS. 14 and 15 show a second conventional example of this type of waterproofing device. This is also a waterproof sensor, and is a waterproof box 101 in which a standing portion 101b is erected around a base 101a so as to form a box shape with one opening, and a standing portion 10 of the waterproof box 101.
A packing (elastic member) 102 having a rectangular cross section disposed on the bottom surface of a groove 101c provided around the distal end surface of the waterproof box 1b. A head 103 is provided which has an edge portion and is screwed and fixed to the standing portion 101b to press the packing 102 to press against the side surface of the groove portion 101c to form a sealed space inside together with the waterproof box 101. ing.

[0004]

In the above-mentioned first conventional waterproofing device, the packing 102 is strongly tightened near the screw-fixed portion, but is separated from the screw-fixed portion. By the way, packing 1
02 can't be so tight
There is a possibility that the hermeticity of the sealed space formed inside together with the waterproof box 101 may be insufficient.

In the above-mentioned waterproofing device of the second conventional example, the packing 102 moves from the side surface of the groove 101c toward the upper surface where the head 103 is pressed against the opening edge of the head 103 by screwing and fixing. The packing 102 becomes closer to the lower surface in contact with the bottom surface.
Is difficult to extend toward the side surface of the groove 101c due to friction with the bottom surface.
The pressing force of No. 2 becomes stronger toward the upper surface, but becomes weaker toward the lower surface. As a result, the pressure of the water that tries to enter between the packing 102 and the side surface of the groove 101 c is increased.
If the pressing force of the packing 102 against the side surface of c is exceeded, water may enter the sealed space, that is, the airtightness may be insufficient.

[0006] The present invention has been made in view of the above points, and an object of the present invention is to provide a waterproofing device capable of ensuring the airtightness of a sealed space.

[0007]

According to a first aspect of the present invention, there is provided a waterproofing device in which a standing portion is erected around a base so as to form a box shape with one opening. A box, an elastic member disposed on the bottom surface of a groove provided around the distal end face of the standing portion of the waterproof box, and an opening in the groove of the waterproof box having an opening on one side and sandwiching the elastic member therebetween. A head having an edge portion disposed therein and being fixed to the standing portion to form a sealed space inside together with the waterproof box, wherein the groove portion projects toward the elastic member. The portion is provided on the bottom surface.

According to a second aspect of the present invention, in the waterproofing device according to the first aspect, the protrusion has a configuration in which a width dimension orthogonal to a circumferential direction of the groove is substantially the same as a width dimension of the groove. I have.

A third aspect of the present invention provides the waterproofing device according to any one of the first and second aspects, wherein the groove has a configuration in which the protrusion is provided on the bottom surface along a circumferential direction. I have.

According to a fourth aspect of the present invention, in the waterproofing apparatus according to any one of the first to third aspects, the head is fixedly pressed against a fixing surface provided on the upright portion. The fixing surface is configured to be flush with the bottom surface of the groove.

According to a fifth aspect of the present invention, there is provided a waterproofing device comprising: a waterproof box having an upright portion formed around a base so as to form a box having one open side; An elastic member disposed on the bottom surface of the groove portion provided, and an opening edge portion is disposed in the groove portion of the waterproof box so as to sandwich the elastic member having an opening on one side and fixed to the standing portion by A head that presses an elastic member against a side surface of the groove to form a sealed space inside together with the waterproof box, wherein between the elastic member disposed on the bottom surface and the side surface near the bottom surface. Is provided with a gap.

According to a sixth aspect of the present invention, there is provided the waterproof device according to the fourth aspect, wherein the elastic member is provided with a notch so as to provide the gap.

According to a seventh aspect of the present invention, there is provided the waterproofing device according to the fourth aspect, wherein the concave portion is provided on the bottom surface of the groove to provide the gap.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A waterproof device according to a first embodiment of the present invention will be described below with reference to FIGS. This waterproofing device is a waterproofing sensor and includes a waterproofing box 1, a head 2, and a packing (elastic member) 3.

The waterproof box 1 has an upright portion 12 erected around a circular base 11, and is formed in a box shape with one opening. The tip of the standing portion 12 of the waterproof box 1 has three screw holes 12 on its inner surface.
1 to 3, a screw 4 a is provided in a screw hole 12 a of the fixing portion 12 b as shown by an arrow in FIGS. 1 to 3.
To fix the head 2. The tip surface of the fixing portion 12b of the waterproof box 1
The fixing surface 12c is fixed to the head 2 by pressing.

A groove 12d is provided around the distal end surface of the standing portion 12 of the waterproof box 1, and a packing 3 described later is provided on a bottom surface 12e of the groove 12d. On the bottom surface 12e of the groove 12d,
As shown in FIG. 1, a protruding portion 12 f protruding toward the packing 3 is provided at a substantially intermediate portion between the fixing portions 12 b along the line 2. The width of the protrusion 12f, which is orthogonal to the circumferential direction of the groove 12d, is substantially the same as the width of the groove 12d. The waterproof box 1 is provided with an insertion hole 13 through which an electric wire 5 for electrically connecting a detection element of the head 2 described later is inserted. This insertion hole 13 is sealed after wiring of the electric wire 5.

The head 2 has a cylindrical shape with a shallow bottom having an opening 2a on one side, and houses a fire detecting element (not shown). In the head 2, as shown in FIG. 4, an electric wire 5 for electrically connecting the detection element is inserted into the insertion hole 13 of the waterproof box 1 and wired. The opening edge of the head 2 is provided in the groove 12d of the waterproof box 1 so as to sandwich the packing 3 provided on the bottom surface 12e of the groove 12d of the waterproof box 1 as described above. , By being screwed and fixed to the standing portion 12, together with the waterproof box 1, a sealed space is formed inside.

The packing (elastic member) 3 has a substantially ring shape and is disposed on the bottom surface 12e of the groove 12d of the waterproof box 1. As described above, the bottom surface 12e of the waterproof box 1, the opening edge of the head 2, and And clamped.

In such a waterproof device, the packing 3
Is tightly clamped between the projection 12f provided on the bottom surface 12e of the groove 12d and the opening edge of the head 2, so that the airtightness of the sealed space formed by the head 2 and the waterproof box 1 is ensured. As shown in FIG. 5, even when fixing portions 12b having screw holes 12a are provided on two inner surfaces of the standing portion 12 so as to face each other, the airtightness of the sealed space can be sufficiently improved. Can be secured.

Since the width of the protrusion 12f perpendicular to the circumferential direction of the groove 12d is substantially the same as the width of the groove 12d, the packing 3 is tightened substantially uniformly over the width of the groove 12d. Therefore, it is possible to further achieve an effect that airtightness of a sealed space formed by the head 2 and the waterproof box 1 can be ensured.

Next, a waterproof device according to a second embodiment of the present invention will be described below with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and only the parts different from those in the first embodiment will be described. In the first embodiment, the protrusion 12f
Is provided at a substantially intermediate portion between the fixed portions 12b along the upright portion 12, whereas in the present embodiment, it is provided on the bottom surface 12e of the groove portion 12d along the circumferential direction. .

As shown in FIG. 6, the projecting portion 12f projects smoothly between the two screwing points so that the approximate center of the two screwing points indicated by arrows becomes the highest. It has become.

In such a waterproof device, the packing 3
Is a protruding portion 1 provided around the bottom surface 12e of the groove portion 12d.
2f and the opening edge of the head 2, the groove 12
Since it is strongly tightened over the entire circumference of d, the effect of the first embodiment that the airtightness of the sealed space formed by the head 2 and the waterproof box 1 can be ensured can be further achieved.

Next, a waterproof device according to a third embodiment of the present invention will be described below with reference to FIG. The same members as those in the second embodiment are denoted by the same reference numerals, and only the parts different from those in the second embodiment will be described. This embodiment is basically the same as the second embodiment, except that the fixed surface 12c to which the head 2 is pressed and fixed and the bottom surface 12e of the groove 12d are formed on the same plane.

In this embodiment, the fixed surface 12c of the upright portion 12 is provided.
As an elastic sealing member sandwiched between the head 3 and the head 2, a packing 3 is provided from the fixing surface 12c to the bottom surface 12e of the groove 12d. This packing 3 is disposed over the fixing surface 12c.
An extension 3b is provided, and the extension 3b has a screw hole 1
A through hole 3c is provided at a location corresponding to 2a.

In this waterproofing device, in addition to the effect of the third embodiment, the fixing surface 12c provided on the standing portion 12 is flush with the bottom surface 12e of the groove 12d. When a sealing member having elasticity is interposed between the fixing surface 12c and the head 2 as described above, the packing 3 extending to the fixing surface 12c is inserted into the groove 12d as described above.
The packing 3 can be used as a sealing member by disposing the packing 3 on the bottom surface 12e.

Next, a fourth embodiment of the present invention will be described below with reference to FIGS. The same members as those in the first embodiment are denoted by the same reference numerals, and only the parts different from those in the first embodiment will be described. In the first embodiment, the protrusion 12f protruding toward the packing 3 is provided on the bottom surface 12e of the groove 12d.
The notch 3c is provided at the lower corner of the
The gap 6 is provided between the packing 3 disposed on the bottom surface 12e of the groove d and the side surface 12g of the bottom surface 12e of the groove 12d.

The packing 3 has the opening edge of the head 2 disposed in the groove 12d of the waterproof box 1, and the head 2 is screwed to the fixing portion 12b to be pressed against the side surface 12g of the groove 12d. The head 2 together with the waterproof box 1 forms a sealed space inside.

In such a waterproofing device, the packing 3 disposed on the bottom surface 12e is attached to the side surface 12 on the bottom surface 12e.
Because the head 2 is fixed to the standing portion 12 and pressed against the opening edge of the head 2, the packing 3 extends toward the side surface 12 g of the groove 12 d because the head 2 is fixed to the upright portion 12. Since there is no friction with the bottom surface 12e, the packing 3 can sufficiently extend toward the groove 12d side surface 12g as shown by the arrow in FIG.
Since the pressing force of the packing 3 against the side surface 12g of the groove 12d can be increased, the airtightness of the sealed space formed by the head 2 and the waterproof box 1 can be ensured.

Since the gap 6 is provided by providing the cutout 3c in the packing 3, it is easy to provide a gap between the packing 3 provided on the bottom surface 12e and the side surface 12g of the bottom surface 12e near the side surface 12g. it can.

Next, a fifth embodiment of the present invention will be described below with reference to FIGS. The same members as those in the fourth embodiment are denoted by the same reference numerals, and only the parts different from the fourth embodiment will be described. In the first embodiment, the notch 3c is provided at the lower corner of the packing 3 so that the groove 12d is formed.
In this embodiment, the gap 6 is provided between the packing 3 disposed on the bottom surface 12e and the side surface 12g of the bottom surface 12e of the groove portion 12d.
By providing the concave portion 12h on the bottom surface 12e of the groove 2d, the packing 3 and the groove 1 disposed on the bottom surface 12e of the groove portion 12d are provided.
A space 6 is provided between the bottom surface 12e of 2d and the side surface 12g.

In this waterproofing device, similarly to the fourth embodiment, the elastic member disposed on the bottom surface 12e is similar to the fourth embodiment.
Since the head 2 is fixed to the upright portion 12, the elastic member is pressed against the opening edge of the head 2 by fixing the head 2 to the upright portion 12, since the side of the groove 2 e is separated from the side surface 12 g closer to the side surface 12 g.
Since there is no friction with the bottom surface 12e when extending toward the 2d side surface 12g, the packing 3 can sufficiently extend toward the groove portion 12d side surface 12g as shown by an arrow in FIG. Since the pressing force of the male member against the 12d side surface 12g can be increased, the airtightness of the sealed space formed by the head 2 and the waterproof box 1 can be ensured.

The recess 12 is formed on the bottom surface 12e of the groove 12d.
Since the gap 6 is provided by providing h, the gap 6 can be easily provided between the packing 3 disposed on the bottom surface 12e and the side surface 12g near the bottom surface 12e.

The waterproofing devices of the first to fifth embodiments are waterproof detectors, but are not limited to waterproof detectors.

[0035]

According to the first aspect of the present invention, the elastic member is strongly clamped between the protrusion provided on the bottom surface of the groove and the opening edge of the head. The airtightness of the formed sealed space can be ensured.

In the waterproofing device according to the second aspect, the width dimension of the groove in the projecting portion, which is orthogonal to the circumferential direction, is substantially the same as the width dimension of the groove, so that the elastic member is substantially formed in the width direction of the groove. Since it is evenly tightened, it is possible to further achieve the effect of the waterproof device according to the first aspect, in which the airtightness of the sealed space formed by the head and the waterproof box can be ensured.

According to a third aspect of the present invention, in the waterproofing device, the elastic member comprises:
By being sandwiched between the protrusion provided around the bottom surface of the groove and the opening edge of the head, it is strongly tightened over the entire periphery of the groove, so that a sealed space formed by the head and the waterproof box is provided. It is possible to further achieve the effect of the waterproofing device according to claim 1, which can ensure the airtightness of the waterproofing device.

The waterproof device according to the fourth aspect has the effect of the waterproof device according to any one of the first to third aspects,
Since the fixing surface provided on the standing portion is flush with the bottom surface of the groove portion, even when an elastic sealing member is sandwiched between the fixing surface of the standing portion and the head, even the fixing surface is used. By disposing the elastic member extending over the bottom surface of the groove, the elastic member can be used as a sealing member.

According to a fifth aspect of the present invention, since the elastic member disposed on the bottom surface is separated from the side surface of the bottom surface by a gap, the opening of the head is secured by fixing the head to the standing portion. When the elastic member is pressed toward the edge and extends toward the groove side surface, there is no friction between the elastic member and the bottom surface, so that the elastic member can sufficiently extend toward the groove side surface, and Since the pressure contact force of the male member can be increased, the airtightness of the sealed space formed by the head and the waterproof box can be ensured.

In the waterproofing device according to the sixth aspect, in addition to the effect of the waterproofing device according to the fifth aspect, since a gap is provided by providing a cutout in the elastic member, the gap can be easily provided.

In the waterproofing device according to the seventh aspect, in addition to the effect of the waterproofing device according to the fifth aspect, since the gap is provided by providing the concave portion on the bottom surface of the groove, the gap can be easily provided.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a state in which packing is provided in a groove according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state where the head is screwed and fixed to a waterproof box of the above.

FIG. 3 is a perspective view showing the waterproof box according to the first embodiment.

FIG. 4 is a front view showing a wiring state of the above.

FIG. 5 is a perspective view showing a waterproof box in which fixing portions having screw holes are provided at two locations on the inner surface of the standing portion of the waterproof box.

FIG. 6 is a partial cross-sectional view showing a state in which packing is provided in a groove according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing a waterproof box according to a third embodiment of the present invention.

FIG. 8 is a partial sectional view showing a state in which a head is provided in a groove of a waterproof box according to a fourth embodiment of the present invention.

FIG. 9 is a partial cross-sectional view showing a state in which the packing is pressed against the side surface of the groove.

FIG. 10 is a partial sectional view showing a state where a head is provided in a groove of a waterproof box according to a fifth embodiment of the present invention.

FIG. 11 is a partial cross-sectional view showing a state where the packing is pressed against the side surface of the groove.

FIG. 12 is a sectional view showing a state in which the head is fixed to the waterproof box of the first conventional example with screws.

FIG. 13 is a perspective view showing the waterproof box of the above.

FIG. 14 is a partial cross-sectional view showing a state in which a head is disposed in a groove of a waterproof box of a second conventional example.

FIG. 15 is a partial cross-sectional view showing a state where the packing is pressed against the side surface of the groove.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterproof box 11 Base 12 Standing part 12c Fixed surface 12d Groove part 12e Bottom surface 12f Projection part 12g Side surface 12h Depression 2 Head 2a Opening 3 Packing (elastic member) 3c Notch 6 Air gap

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tomohiro Suzuki 1048 Kazuma Kadoma, Kadoma-shi, Osaka F-term in Matsushita Electric Works, Ltd. (reference) 3J046 AA08 BA01 BC15 CA10

Claims (7)

[Claims] 1. A waterproof box in which an upright portion is erected around a base portion so as to form a box having one side open, and a bottom surface of a groove provided around an end surface of the upright portion of the waterproof box. An elastic member to be provided, an opening edge portion is provided in a groove of the waterproof box so as to sandwich the elastic member on one side, and is fixed to an upright portion so as to be inside the waterproof box together with the waterproof box. A waterproof device comprising: a head forming a sealed space; wherein the groove has a projection on the bottom surface that projects toward the elastic member. 2. The waterproofing device according to claim 1, wherein a width of the projecting portion orthogonal to a circumferential direction of the groove is substantially the same as a width of the groove. 3. The waterproof device according to claim 1, wherein the groove is provided with the protrusion on the bottom surface along a circumferential direction. 4. The head according to claim 1, wherein the head is fixedly pressed against a fixing surface provided on the standing portion, and the fixing surface is flush with a bottom surface of the groove. The waterproofing device according to any one of the above. 5. A waterproof box in which an upright portion is erected around a base portion so as to form a box shape with one opening, and a bottom surface of a groove portion provided around the distal end surface of the upright portion of the waterproof box. An elastic member to be disposed, an opening edge portion is disposed in a groove portion of the waterproof box so as to sandwich the elastic member on one side, and the elastic member is fixed to a standing portion so that the elastic member is provided on a side surface of the groove portion. A head that is pressed into contact with the waterproof box to form a sealed space therein, wherein a gap is provided between the elastic member disposed on the bottom surface and the side surface of the bottom surface. Characterized waterproof equipment. 6. The waterproofing device according to claim 5, wherein the gap is provided by providing a cutout portion in the elastic member. 7. The waterproofing device according to claim 5, wherein the space is provided by providing a concave portion on a bottom surface of the groove portion.