JPH1089671A - Air intake and exhaust cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve mounting operability at the time of executing by providing a spring stopper in an inner cylinder of an outdoor member so that its elastic locking piece is engaged with a threaded part of an outer cylinder of an indoor member in the state that it is jumped up obliquely rearward of the inner cylinder. SOLUTION: When inner cylinder 7 and outer cylinder 8 of an indoor member 3A are engaged so that an outdoor member 3B is forced to the last at the member 3A side, the member 3B is moved at once to the member 3A side while an elastic locking piece of a spring stopper 21 is intermittently brought into contact with a threaded part 15 of the cylinder 8 of the member 3A to be being elastically deflected. Then, when the member 3B is rotated with respect to the member 3A, the member 3B is further moved to the member 3A side while the piece of the stopper 21 is being engaged with the part 15 of the cylinder 8 of the member 3A. Thus, an outward flange 20 of the member 3B is brought into pressure contact with a mounting wall. And, the wall is fastened from both inner and outer surfaces by the members 3A and 3B. Thus, the intake and exhaust cylinder 3 is rigidly mounted at the wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supply / exhaust cylinder suitable for use in an outdoor supply / exhaust type oil-burning appliance or gas-burning appliance.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing an example of a conventional air supply / exhaust cylinder, and FIG. 6 is a longitudinal sectional view showing a construction state of the air supply / exhaust cylinder of FIG.

Conventionally, as this kind of supply / exhaust cylinder, as shown in FIG. 5, an indoor member 3A having a double cylinder of an inner cylinder 7 and an outer cylinder 8, and a double cylinder of an inner cylinder 9 and an outer cylinder 10 are shown. There is known a supply / exhaust tube 3 in which an outdoor member 3B having a detachable fitting is detachably fitted (see Japanese Patent Application Laid-Open No. 1-225809). Here, the fitting method between the indoor member 3A and the outdoor member 3B includes a male screw 6 formed on the outer cylinder 10 of the outdoor member 3B so that the indoor member 3A and the outdoor member 3B do not easily come off.
A screwing method by screwing with a female screw 5 formed on the outer cylinder 8 of the indoor member 3A is widely used.

[0004]

However, in this case, as shown in FIG. 6, when the air supply / exhaust tube 3 is penetrated through the mounting wall 1 and mounted, the indoor member 3A is attached to the outdoor member 3A.
B needs to be rotated and screwed on, and the mounting wall 1 needs to be tightened from both inside and outside with the indoor member 3A and the outdoor member 3B.
There is a disadvantage that the workability of mounting the supply / exhaust tube 3 is poor.
In particular, supply and exhaust cylinders 3 above high-rise buildings such as high-rise apartments.
In the case of constructing a work, it is necessary to work at a high place. Therefore, it is strongly demanded to improve the workability of the work from the viewpoint of shortening the construction period and ensuring safety.

The present invention has been made in view of the above circumstances, and has as its object to provide a supply / exhaust tube capable of improving the mounting workability during construction.

[0006]

That is, the present invention comprises an indoor member having a double cylinder of an inner cylinder and an outer cylinder, and an outdoor member having a double cylinder of an inner cylinder and an outer cylinder. In an air supply / exhaust cylinder in which an outdoor member is detachably combined by fitting its inner cylinder and outer cylinder to each other,
A screw portion is formed in the outer cylinder of the indoor member, and a spring stopper is provided on the inner cylinder of the outdoor member so that the elastic locking piece portion can engage with the screw portion in a state where the elastic locking piece portion jumps obliquely rearward of the inner cylinder. Is provided.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing one embodiment of the supply / exhaust cylinder according to the present invention, FIG. 2 is a perspective view showing another embodiment of the supply / exhaust cylinder according to the present invention, and FIG. FIG. 4 is a perspective view showing three examples of a spring stopper.

As shown in FIG. 1, the air supply / exhaust tube 3 according to the present invention includes an indoor member 3A and an outdoor member 3B.
have. A pipe connection portion 14 is provided at the rear end of the outer cylinder 8, and an air supply pipe connection port 13 is formed in the pipe connection portion 14 so as to communicate with the outer cylinder 8. Further, a concentric cylindrical inner cylinder 7 is provided inside the outer cylinder 8, and an exhaust pipe connection port 12 is connected to the inner cylinder 7. In addition, the inner cylinder 7 is connected to the pipe connection part 14 by the end plate 11 attached to the rear end.

On the other hand, the outdoor member 3B has an outer cylinder 10, and an outward flange body 20 is bent at the rear end of the outer cylinder 10. A concentric cylindrical inner cylinder 9 is provided in the outer cylinder 10, and a wind-resistant plate 30 is attached to the rear end of the inner cylinder 9, and a substantially frustoconical cosmetic body 27 faces outward. It is bent to face the flange body 20.
Further, three spring stoppers 21 are arranged near the front end of the inner cylinder 9 at equal angular intervals (120 ° intervals) along the circumference of the inner cylinder 9.
As shown in FIG. 4B, it is composed of a fixed piece 21a and an elastic locking piece 21b. Here, each of the spring stoppers 21 is mounted such that the fixing piece 21a is fixed to the outer peripheral surface of the inner cylinder 9 by spot welding or the like, and the mounting position is as shown in FIGS. Are shifted from each other in the axial direction of the inner cylinder 9 (the left-right direction in FIG. 3) in accordance with the pitch of the screw portion 15 of the outer cylinder 8. Further, the elastic locking pieces 21b of the respective spring stoppers 21 are in a state of jumping obliquely rearward of the inner cylinder 9.

Since the supply / exhaust tube 3 according to the present invention has the above-described configuration, the following procedure is used when the supply / exhaust tube 3 is mounted so as to penetrate the mounting wall.

First, the indoor member 3A is inserted into the through hole of the mounting wall from the indoor side, and is fixed to the mounting wall. Next, the inner member 7 and the outer tube 8 of the indoor member 3A are connected to the outdoor member 3B from the outdoor side.
The inner cylinder 9 and the outer cylinder 10 are fitted to each other, and in this state, the outdoor member 3B is pushed all the way into the indoor member 3A.
Then, as shown in FIG. 3, the elastic members 21 b of the three spring stoppers 21 intermittently hit the threaded portions 15 of the outer cylinder 8 of the indoor member 3 </ b> A, and the outdoor member 3 </ b> B elastically bends. It moves to the indoor member 3A side at a stretch.

Finally, the outdoor member 3B is connected to the indoor member 3A.
Rotate against Then, the outdoor member 3B is 3
The elastic locking pieces 21b of the spring stoppers 21 are further screwed into the threaded portions 15 of the outer cylinder 8 of the indoor member 3A and further moved toward the indoor member 3A, and the outward flange body 20 of the outdoor member 3B is attached. It is pressed against the wall, and the mounting wall is tightened from both inside and outside by the indoor member 3A and the outdoor member 3B.
As a result, the supply / exhaust tube 3 is firmly attached to the mounting wall, and the work of attaching the supply / exhaust tube 3 is completed here.

As described above, when the air supply / exhaust tube 3 is mounted, most of the work is completed only by pushing the outdoor member 3B into the indoor member 3A side, so that the workability of mounting the air supply / exhaust tube 3 is improved.

After the work of mounting the air supply / exhaust tube 3 is completed, the exhaust pipe and the air supply pipe of a combustion device (not shown) are connected to the exhaust pipe connection port 12 and the air supply pipe connection port 13, respectively. Then, the exhaust gas of the combustion apparatus is discharged outside through the internal space of the inner cylinders 7 and 9 of the supply / exhaust cylinder 3, while the outdoor air is used as combustion air with the inner cylinders 7 and 9 of the supply / exhaust cylinder 3. Cylinder 8, 10
Is supplied to the combustion equipment through the space between them.

In the above-described embodiment, the outer cylinder 1 of the outdoor member 3B is required to secure the engagement between the elastic locking piece 21b of the spring stopper 21 and the screw 15 of the outer cylinder 8.
2, the supply / exhaust tube 3 is shorter than the inner tube 9. However, as shown in FIG.
0a may be provided.

In the above-described embodiment, the supply / exhaust cylinder 3 in which three spring stoppers 21 are disposed on the inner cylinder 9 of the outdoor member 3B has been described. However, as shown in FIG. The spring stopper 21 in which the elastic locking pieces 21b are integrally connected by an annular fitting ring 21c may be used instead. Further, as shown in FIG. 4C, a wing-shaped auxiliary support portion 21d is attached to the fixed piece portion 21a, and the auxiliary support portion 21d is brought into contact with the inner peripheral surface of the outer cylinder 10 of the outdoor member 3B. Thereby, it is also possible to increase the adhesion of the spring stopper 21 to the inner cylinder 9.

[0018]

As described above, according to the present invention, an indoor member having a double cylinder of an inner cylinder and an outer cylinder and an outdoor member having a double cylinder of an inner cylinder and an outer cylinder are provided. In an air supply / exhaust cylinder in which an indoor member and an outdoor member are detachably combined with each other by fitting their inner cylinders and outer cylinders to each other,
A screw portion is formed in the outer cylinder of the indoor member, and a spring stopper is provided on the inner cylinder of the outdoor member so that the elastic locking piece portion can engage with the screw portion in a state where the elastic locking piece portion jumps obliquely rearward of the inner cylinder. Since most of the installation work of the air supply / exhaust tube is completed only by pushing the outdoor member into the indoor member side, the workability of mounting the air supply / exhaust tube can be improved. For this reason, it is possible to shorten the construction period while ensuring safety, particularly when constructing the air supply / exhaust tube above a high-rise building.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a supply / exhaust cylinder according to the present invention.

FIG. 2 is a perspective view showing another embodiment of the supply / exhaust tube according to the present invention.

FIG. 3 is a sectional view showing a main part of the supply / exhaust cylinder of FIG.

FIG. 4 is a perspective view showing three examples of a spring stopper.

FIG. 5 is a perspective view showing an example of a conventional air supply / exhaust cylinder.

FIG. 6 is a longitudinal sectional view showing a construction state of the supply / exhaust tube of FIG.

[Explanation of symbols]

 3 ... supply / exhaust tube 3A ... indoor member 3B ... outdoor member 7, 9 ... inner tube 8, 10 ... outer tube 15 ... screw portion 21 ... spring stopper 21b ... elastic locking piece portion

Claims (1)

[Claims] An indoor member having a double cylinder of an inner cylinder and an outer cylinder, and an outdoor member having a double cylinder of an inner cylinder and an outer cylinder. In an air supply / exhaust cylinder in which outer cylinders are fitted together and detachably combined with each other, a screw portion is formed on the outer cylinder of the indoor member, and a spring stopper is provided on the inner cylinder of the outdoor member. A supply / exhaust cylinder provided so as to be able to engage with the screw portion in a state where the inner cylinder is jumped obliquely rearward.