JPH11294815A - Grill for supply and exhaust air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grill for supply and exhaust air which can be easily attached to a wall material without using any joining means, such as the screw, etc., and does not require many components. SOLUTION: A grill for supply and exhaust air is provided with a coupling pipe 2 which is attached to a wall material by inserting the pipe 2 into the attaching port of the wall material from the indoor side and a grill main body 3 which is inserted into the pipe 2. The pipe 2 has a pipe section 4 on which a duct is put and a flange 5 at one end of the pipe section 4. Vane pieces 6 which are locked to the opening margin of the attaching port are protruded in the tangential direction from three spots on the outer peripheral surface of the pipe section 4 on the flange 5 side. Each vane piece 6 is provided with a locking edge 9 which is inclined toward the front end of the piece 6 on the inner edge of the piece 6 on the flange 5 side. The locking edge 9 is formed of two inclined edges so that the piece 6 may cope with the thickness fluctuation of the wall material over a wide range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply / exhaust grill provided at an end of a duct mainly in a ventilation system or an air conditioning system for a house.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 9-324 discloses this type of grill structure.
No. 473. There, a first wall which is assembled from the attic side and the indoor side with the ceiling wall therebetween and fitted together.
A supply / exhaust grill is constituted by the joint tube, the second joint tube, and a grill main body which is fitted inside the second joint tube from the indoor side. A spring frame is provided on the grill main body, and the mounted state of the grill main body can be maintained by elastically deforming the spring frame in the second joint cylinder. A flexible duct is arranged on the side of the attic, and its end is externally connected to the first joint cylinder. Regarding the elastic engagement structure of the grill main body, Japanese Patent Application Laid-Open No. 3-208959 has the same meaning.

[0003]

SUMMARY OF THE INVENTION
Before a wall material such as a ceiling or a wall surface is stretched, the first joint tube needs to be joined to the flexible duct. Therefore, if the first joint tube is forgotten to be joined due to carelessness or the like, it is necessary to remove the wall material or enter the attic to join the tube, and in any case, much labor is required. As three components of the first and second joint cylinders and the grill main body are indispensable as the components of the grill, the cost is high and screws need to be fixed to fix both joint cylinders. It may not be applicable when the wall material is formed of gypsum board.

[0004] An object of the present invention is composed of two parts, a joint tube connected to the end of the duct and a grill main body press-fitted to the joint tube. It is an object of the present invention to reduce the cost of the grill and to make it possible to connect the duct to the joint tube and to attach the joint tube to the wall surface easily and quickly only by the worker in the room.

Another object of the present invention is to easily attach a joint tube to a wall material without using a fastener, so that even a member formed of a gypsum board can be applied without any trouble. An object of the present invention is to be able to cope with a wide range even when the thickness of a material changes to a large or small size.

[0006]

As shown in FIG. 1, a supply / exhaust grill according to the present invention comprises a joint tube 2 inserted into a mounting port 1 provided in a wall member W from the indoor side, and a joint tube 2 attached thereto. And a grill main body 3 which is press-fitted and covers an opening on the indoor side of the joint cylinder 2. The joint tube 2 has a duct D as shown in FIG.
And a flange 5 projecting from an end of the cylindrical portion 4 on the indoor side, and projecting tangentially at a plurality of locations on the outer peripheral surface of the cylindrical portion 4, and extending in the thickness direction. And an elastically deformable wing piece 6. The wing piece 6 is provided with a latching edge 9 at the inner edge of the wing on the side facing the flange 5 to cooperate with the flange 5 to clamp the inner and outer opening edges of the mounting port 1. This hanging edge 9
As shown in FIGS. 1 and 4, the wing piece 6 is inclined so as to gradually move away from the flange 5 from the protruding base end to the protruding end.

The latching edge 9 includes a plurality of inclined edges 9b and 9d,
A step 9c connecting the inclined edges 9b and 9d to each other in a continuous manner is formed. The grill main body 3 includes a grill cylinder 10 that is press-fitted to the inner surface of the cylindrical section 4, a cap section 11 that is continuously formed on the outer periphery of the indoor side end of the grill cylinder 10, and an inner surface of the grill cylinder 10. And a group of louver pieces 12 provided, and when the grill body 3 is press-fitted to the joint tube 2, the outer surface of the flange 5 on the indoor side is closed by the cap portion 1.
Covered with 1.

[0008]

When the air supply / exhaust grill is installed, the wall material W
The duct D is pulled out from the mounting opening 1 to the indoor side, and the duct D is connected to the tubular portion 4 of the joint tube 2 on the indoor side. Next, wing piece 6
While being elastically deformed so as to be wound around the peripheral surface of the cylindrical portion 4, and inserted into the mounting opening 1. The wing piece 6 that has passed through the mounting opening 1 attempts to return to the posture before deformation due to its own elasticity.
In this state, since the latching edge 9 is inclined so as to gradually move away from the flange 5 from the protruding base end to the protruding end, at a position determined by the thickness dimension of the wall material W and the diameter dimension of the mounting opening 1, A part of the locking edge 9 is received. Although the distal end side returns to the free state from the receiving position, the base end side from the receiving position is maintained in an elastically deformed state. Therefore, if a plurality of wing pieces 6 are provided in the cylindrical portion 4, there is no need to screw the flange 6 and the like to the wall material W,
Can be securely attached without immobilization. Thereafter, the grill main body 3 is press-fitted to the cylindrical portion 4 to complete the work of mounting the air supply / exhaust grill.

When the hooking edge 9 is formed by a plurality of stepped inclined edges 9b and 9d, the dimension change width in the direction in which the inclined edges 9b and 9d and the flange 5 face each other can be set large. Therefore,
It is possible to flexibly cope with a case where the thickness dimension of the wall material W changes variously. In addition, when the thickness of the wall material W is large, if the locking edge 9 is formed by a single inclined edge, it is necessary to insert the wing piece 6 into the mounting port 1 in a state where most of the wing pieces 6 are elastically deformed. ,
During long-term use, wing pieces 6 are creep-deformed and the elasticity is impaired, the joint tube 2 moves loosely, or the flange 5 floats away from the wall material W to generate noises. Can also be prevented well.

[0010]

1 to 5 show an embodiment in which the air supply / exhaust grill according to the present invention is installed on the wall of a living room and used for exhaust. In FIG. 1, an exhaust grill is provided with a joint tube 2 inserted and mounted from the indoor side into a mounting opening 1 provided in the wall material W from a room side, and a press-fit mounted on the joint tube 2 to open an indoor side opening of the joint tube 2. And a grill body 3 to cover. Symbol D is a duct formed of a flexible tube.

In FIG. 2, a joint tube 2 has a cylindrical portion 4 having a circular cross section to which a duct D is externally connected, a circular flange 5 projecting from the indoor side end of the cylindrical portion 4, and an outer peripheral surface of the cylindrical portion 4. 3 is formed of a plastic molded article integrally formed with three wing pieces 6 protruding at equal intervals near the flange 5. Mounting port 1
Is larger than the outer diameter of the duct D and the flange 5
Set smaller than the diameter of. At three places on the outer peripheral surface of the cylindrical portion 4, projecting pieces 7 for retaining and holding the duct D are provided at equal intervals.

1 and 3, the wing piece 6 is provided at a small distance from the plate surface of the flange 5.
It protrudes from the peripheral surface of the cylindrical portion 4 in the tangential direction.
The wing piece 6 is formed of a tapered tapered body that can be elastically deformed in the thickness direction, and the inner and outer opening edges of the mounting port 1 are sandwiched between the wing inner edge on the side facing the flange 5 in cooperation with the flange 5. A locking edge 9 is provided.

In FIG. 4, the locking edges 9 are straight edges 9 provided in order from the protruding base end side of the wing piece 6 to the tip end side.
a, the first inclined edge 9b, the step 9c, and the second inclined edge 9d. As described above, the hooking edge 9 is provided with a plurality of inclined edges 9b and 9d, and the step 9c connecting these in a continuous manner.
The width of change in the facing distance between each of the inclined edges 9b and 9d and the flange 5 while suppressing the protruding length of the wing piece 6 as compared with the case where the engaging edge 9 is formed by a single inclined edge. Therefore, even when the thickness of the wall material W changes to a large or small value, the joint tube 2 can be attached without any trouble. In the illustrated example, the inclined edges 9b and 9d have the same inclination angle, and are inclined by about 10 degrees with respect to the straight edge 9a.

The grill main body 3 includes a grill cylinder 10 having a circular cross section which is press-fitted to the inner surface of the cylindrical portion 4 of the joint cylinder 2, and a cap portion 11 continuously projecting around the inner end of the grill cylinder 10 on the indoor side. And a group of louver pieces 12 provided in a multi-stage shape at the inside end of the grill cylinder 10 on the indoor side of the cylinder. In order to press-fit engagement of the grill cylinder 10 with the cylinder portion 4, as shown in FIG. The deformed cylindrical wall can be elastically deformed. Further, two types of projections 14 and 15 for retaining are alternately provided on the divided cylindrical wall. As shown in FIG. 5, the engagement groove 1 is formed on the inner peripheral surface of the cylindrical portion 4 corresponding to the former protrusion 14.
6 is formed in a circular shape.

The cap portion 11 is protruded from the end of the grill cylinder 10 in the shape of a dish in a state of being inverted, and the inner diameter of the opening edge contacting the wall material W is set slightly larger than the outer diameter of the flange 5. I have. Therefore, in the state where the grill cylinder 10 is press-fitted to the cylinder section 4, as shown in FIG.
Numeral 1 covers the flange 5 and completely covers the outer surface thereof.

Next, an outline of a procedure for installing the exhaust grill will be described. When the exhaust grill is attached, the arrangement of the duct D and the processing of the attachment port 1 are performed in advance on the outside (indoor) side of the wall material W. When the grill is mounted, the duct D is pulled out from the mounting opening 1 to the indoor side, and the end of the duct D is fitted to the cylindrical portion 4 of the joint tube 2 to form a band 17 (see FIG. 1).
Fix with etc. Next, as shown in FIG. 3, each wing piece 6 is elastically deformed so as to be wound around the peripheral surface of the cylindrical part 4, and the cylindrical part 4 and the wing piece 6 are inserted into the mounting port 1 from the indoor side.

The wing 6 that has passed through the mounting opening 1 attempts to return to the state before deformation due to its own elasticity. However, a part of the latching edge 9 of the wing piece 6 abuts against the opening edge on the wall surface side of the mounting port 1 and cooperates with the flange 5 to clamp the mounting port 1 inside and outside. The wing piece 6 on the tip end side from the set position returns to the free state, but the wing piece 6 on the base end side from the previous contact position.
Keep the state elastically deformed in the mounting opening 1. Since the entire joint tube 2 is drawn inward by the elastic force, the flange 5 comes into close contact with the wall material W. Finally, the grill main body 10 is pushed into the cylindrical portion 4 and the projections 14 are engaged with the engagement grooves 16, whereby the installation of the exhaust grill is completed. As shown in FIG. 5, another projection 15 abuts on the inner peripheral surface of the cylindrical portion 4 to elastically deform the cylindrical wall divided by the slit 13, and prevents the grill main body 3 from floating due to the frictional resistance.

When the thickness of the wall material W is small, the middle of the first inclined edge 9b of the retaining edge 9 contacts the opening edge of the mounting opening 1. This contact position gradually moves to the tip end side of the blade piece 6 as the thickness of the wall material W increases. In many cases, the thickness of the wall material W tends to increase every few mm, so even if the step 9c is provided between the first inclined edge 9b and the second inclined edge 9d, The wing piece 6 is latched and abutted against the mounting port 1 without any trouble. The protrusion dimension of the wing piece 6 can be reduced by the provision of the step 9c. The thickness of the wall material W is
If the distance between the straight edge 9a of the wing piece 6 and the flange 5 is smaller than the small interval E, it can be dealt with by interposing a ring-shaped spacer between the flange 5 and the wall material W.

In the above embodiment, each of the inclined edges 9b and 9d is formed in a straight line. However, it is not necessary to form the inclined edges 9b and 9d. The hanging edge 9 may be formed by two or more inclined edges. The louver pieces 12 may be formed in a lattice shape or a honeycomb shape. It is preferable to provide three or more wing pieces 6, but it is sufficient if at least two or more. Supply and exhaust grills may be mounted on the ceiling or floor.

[0020]

According to the present invention, the supply / exhaust grill is constituted by the joint tube 2 mounted on the wall member W and the grill main body 3 press-fitted on the joint tube 2. Further, the joint tube 2 does not require the use of fasteners such as screws because the plurality of wing pieces 6 and the flange 5 provided on the tube portion 4 cooperate to clamp the mounting port 1 inside and outside. The mounted state can be maintained autonomously by the elastic force of the wing piece 6. Therefore, as compared with the conventional example, the manufacturing cost can be reduced, and the labor and time required for the construction can be reduced, and the overall cost can be reduced. Since a fastener such as a screw is not used, the invention can be applied to the case where the wall material W is formed of a gypsum board without any trouble, and has an advantage that a grill can be mounted without having to prepare a separate reinforcing material.

The engaging edge 9 of the joint tube 2 has a plurality of inclined edges 9b.
Since the joint tube 2 can be securely attached to the wall material W even when the thickness dimension of the wall material W changes in size, the application range of the supply / exhaust grill is expanded. The versatility can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state in which an air supply / exhaust grill is attached.

FIG. 2 is an exploded perspective view of a supply / exhaust grill.

FIG. 3 is a sectional view taken along line AA in FIG.

FIG. 4 is a development view of a wing piece.

FIG. 5 is a longitudinal sectional view of a main part showing a retaining structure of a grill main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment opening 2 Joint tube 3 Grill body 4 Tube part 5 Flange 6 Wing piece 9 Hanging edge 9b / 9d Hanging edge D Duct W Wall material

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor ▲ Kakuno Tomoko No.12 Mikita Kitanocho, Higashiosaka-shi, Osaka Shin-Kansai Bearing Co., Ltd.

Claims (3)

[Claims] 1. A joint tube 2 inserted and mounted from the indoor side into a mounting opening 1 provided in a wall material W, and a grill main body 3 press-fitted to the joint tube 2 to cover an opening of the joint tube 2 on the indoor side. The joint tube 2 includes a tube portion 4 to which the duct D is externally connected, a flange 5 projecting from an end of the tube portion 4 on the indoor side, and a tube portion 4.
Projecting tangentially at a plurality of locations on the outer peripheral surface of
A wing piece 6 that is elastically deformable in the thickness direction, and the wing piece 6 has, on the wing inner edge on the side facing the flange 5, a retaining edge that cooperates with the flange 5 to hold the inner and outer opening edges of the mounting port 1. An air supply / exhaust grill provided with 9, wherein the latching edge 9 is gradually inclined away from the flange 5 from the projecting base end of the wing piece 6 to the projecting end. 2. The hanging edge 9 has a plurality of inclined edges 9b and 9d.
And a step 9 connecting the inclined edges 9b and 9d in a continuous manner.
2. The air supply / exhaust grill according to claim 1, wherein the grill is formed by: 3. A grill cylinder 10 in which the grill main body 3 is press-fitted to the inner surface of the cylindrical portion 4 of the joint cylinder 2, and a cap portion formed continuously over the outer periphery of the indoor side end of the grill cylinder 10. 11 and a group of louver pieces 12 provided on the inner surface of the grill cylinder 10, and in a state where the grill main body 3 is press-fitted to the joint cylinder 2,
The air supply / exhaust grill according to claim 2, wherein the outer surface of the flange (5) on the indoor side is covered with the cap portion (11).