JPH0894144A - Ventilator - Google Patents

Abstract

PURPOSE: To provide a ventilator in which a clamping screw can be temporarily clamped by a small force without preparing a separate component and which is not deformed even if the screw is strongly clamped to increase the clamping force of a body. CONSTITUTION: A thin film 10 in which an inlet hole 9a and an outlet hole 9b inserted with a clamping screw 8 are provided at a flange 7 and a small hole 20 which is smaller than the diameter of the screw 8 is provided substantially at the center of a boundary between the holes 9a and 9b is formed, and a fixing hole 9 is formed by reducing the diameter of the hole 9b smaller than that of the head 8a of the screw 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator which is inserted into an opening provided on a ceiling surface or a room wall and discharges dirty air in the room.

[0002]

2. Description of the Related Art Heretofore, a ventilation device of this type has generally been constructed as shown in, for example, Japanese Utility Model Laid-Open No. 4-67022. The configuration will be described below with reference to FIGS. 5 and 6.

As shown in the figure, the main body 101 includes a fan 10
2 and a motor 103 etc., and a suction port 104 on the lower surface
And a box-shaped outer shell 106 having a discharge port 105 on its side surface, and a flange portion 108 having a plurality of fixing holes 107 is provided around the suction port 104. This fixing hole 1
In No. 07, the front side is smaller and the rear side is larger than the outer dimensions of the fixing screw 109, and the fixing screw 109 can be inserted from the front side and temporarily fixed.

In the above structure, the ventilation device is installed on the ceiling 110.
Before attaching to the
7. Fixing screw 109 is inserted into 7 and temporarily fixed, and main body 1
01 is inserted into the opening 111 of the ceiling 110, and the flange 108 is supported by one hand 112 in a state of being in contact with the lower surface of the ceiling 110, the other hand 113 holds the driver 114, and the fixing screw 109 is tightened. Therefore, the installation work of the main body 101 was performed by one person.
At this time, the fixing hole 107 is formed in the flange portion 10 of the main body 101.
8 is directly provided, and its shape is also a simple one in which the front side is smaller and the rear side is larger than the outer dimensions of the fixing screw 109.
Even if the fixing strength of No. 1 is increased, it is not deformed, and it is not necessary to separately prepare a holding component for temporarily fixing the fixing screw 109.

[0005]

In such a conventional ventilation device, since the thickness of the portion of the fixing hole 107 that is smaller than the outer dimension of the fixing screw 109 is large, the strength of the fixing hole 107 is large, and the fixing screw 109 is large. There has been a problem that a great amount of labor is required to insert and temporarily fix the above into the fixing hole 107.

The present invention is to solve the above-mentioned problems. The fixing screw can be temporarily fixed to the substantially central portion of the fixing hole with a small force without preparing a separate component, and the fixing screw is strongly tightened to increase the fixing strength of the main body. A first object of the present invention is to provide a ventilation device that does not deform even if it is increased.

A second object is to enable temporary fixing with a small force while guiding the fixing screw toward the center of the fixing hole.

A third object is to enable the fixing screw to be temporarily fixed to the substantially central portion of the fixing hole with a smaller force.

[0009]

In order to achieve the above first object, the ventilating device of the present invention has a box-like shape which is inserted into an opening provided in a ceiling surface or a chamber wall, A main body having a flange portion fixed to the periphery of the opening with a fixing screw, a blower disposed inside the main body, and an inlet hole and an outlet hole through which the fixing screw is inserted in the flange portion. A plurality of fixing holes are provided, and a thin film having a small hole smaller than the diameter of the fixing screw is provided at the boundary between the inlet hole and the outlet hole in a substantially central portion, and the diameter of the outlet hole is set to the diameter of the head of the fixing screw. The fixing hole is formed by forming it with a smaller diameter.

In order to achieve the second object, the second
This means forms a fixing hole by projecting a substantially central portion of the thin film in the shape of a mountain on the outlet hole side, forming a mountain-shaped concave portion on the inlet hole side, and forming a small hole at the apex of the mountain-shaped concave portion.

In order to achieve the third object, the third
The means forms a fixing hole by forming a cross-shaped hole at approximately the center of the thin film.

[0012]

According to the present invention, with the structure of the first means described above, when the ventilation device is attached to the ceiling surface, a small hole smaller than the outer dimension of the fixing screw formed in the approximate center of the thin film of the fixing hole of the main body in advance. Insert the fixing screw with the tip aligned to it, tentatively fix it by breaking through the thin film, and tighten the fixing screw to allow the installation work of the main body to be done by one person, and also the deformation by tightening the fixing screw. In addition, there is no need to separately provide a holding component for temporarily fixing the fixing screw, and the fixing screw can be temporarily fixed with a small amount of labor.

Further, according to the structure of the second means, the fixing screw is guided to the center of the fixing hole by the mountain-shaped inclined surface of the mountain-shaped recess, and the thin film is easily pierced by the small hole provided at the apex. You will be able to do it.

Further, according to the structure of the third means, the cross-shaped hole can be easily expanded with a small amount of labor by the fixing screw to temporarily fix the fixing screw.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, the main body 1 has a box-like shape which is projected from an opening 3 of a ceiling surface 2 to a ceiling back 4 and is connected via an adapter 6 to a duct 5 communicating with the outdoor 4A. A flange portion 7 extending to the outside of the opening portion 3 is formed at the lower end portion, and a plurality of fixing holes 9 through which fixing screws 8 for fixing the main body 1 to the peripheral edge of the opening portion 3 are inserted are provided in the flange portion 7. Has been. Then, the fixing hole 9 forms a thin film 10 in which a small hole 20 smaller than the diameter of the fixing screw 8 is provided in the center of the boundary between the inlet hole 9a and the outlet hole 9b, and the diameter of the outlet hole 9b is set to the head of the fixing screw 8. The diameter is smaller than that of the portion 8a. Also,
A blower 13 including a motor 12 to which a fan 11 is fixed is disposed inside the main body 1. On the other hand, a vent cap 15 is provided on the outer wall 14 of the duct 5 on the outdoor 4A side to prevent rainwater from entering.

With the above structure, when the main body 1 is attached to the ceiling surface 2, the fixing screw is fixed to the small hole 20 smaller than the outer dimension of the fixing screw 8 formed in the fixing hole 9 of the main body 1 in the approximate center of the thin film 10. 8 are inserted together and inserted with a small force, and the thin film 10 is pierced to be temporarily fixed, and in order to bring the flange portion 7 of the main body 1 and the ceiling surface 2 into close contact with each other, a packing 16 is provided on the outer peripheral upper surface of the flange portion 7. Support the main body 1 with one hand 17 and the driver 1 with the other hand 18.
By tightening the fixing screw 8 with 9, the installation work of the main body 1 can be performed by one person, and the hole diameters of the inlet hole 9a and the outlet hole 9b are formed larger than the outer dimensions of the fixing screw 8 Due to the shape in which the hole diameter of the hole 9b is formed smaller than the outer dimension of the head portion 8a of the fixing screw 8, there is no deformation due to tightening of the fixing screw 8, and a holding component for temporarily fixing the fixing screw 8 needs to be additionally provided. The fixing screw can be temporarily fixed with little effort.

As described above, according to the ventilator of the first embodiment of the present invention, the fixing screw can be temporarily fixed to the substantially central portion of the fixing hole with a small force without preparing a separate component, and the fixing screw is strongly tightened. Even if the fixing strength of the main body is increased, it will not be deformed.

Next, the second embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. The second embodiment is different from the first embodiment in the shape of the fixing hole, and the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the drawing, the central portion of the thin film 10A is projected in a mountain shape toward the outlet hole 9b to form a mountain-shaped recess 21 on the inlet hole 9a side, and the small hole 2 is formed at the apex of the mountain-shaped recess 21.
0A is formed to form the fixing hole 9A.

In the above structure, the fixing screw 8 is attached to the inlet hole 9
By inserting into the a, the tip of the fixing screw 8 is guided to the center of the fixing hole 9A along the inclined surface of the chevron-shaped recess 21, and inserted into the small hole 20A provided at the apex of the chevron-shaped recess 21 to lighten the thin film 10A. It is pierced and the fixing screw 8 is held by the thin film 10A and temporarily fixed, and can be fixed by the same mounting work as in the first embodiment.

As described above, according to the ventilator of the second embodiment of the present invention, the fixing screw 8 inserted into the fixing hole 9A is guided by the inclined surface of the chevron-shaped recess 21 so that the tip of the fixing screw 8 has the small hole 20A. Fixing screw 8 is always inserted into fixing hole 9
Since the fixing screw 8 is located almost at the center of A, the fixing screw 8 can be temporarily fixed with a small force without paying attention to temporarily fixing the fixing screw 8 to the center of the fixing hole 9A.

Next, the third embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. The third embodiment is different from the first embodiment in the shape of the fixing hole, and the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, a cross-shaped hole 22 is provided in the substantially central portion of the thin film 10B, and a tongue piece 23 divided by the cross-shaped hole 22 is formed to form the fixing hole 9B.

In the above structure, a fixing screw (not shown)
The fixing screw is temporarily fixed to the fixing hole 9B by inserting the tip of the above into the center of the cross-shaped hole 22 and breaking through the thin film 10B. At this time, since the tongue piece 23 formed by being divided by the cross-shaped hole 22 is easily deformed and spreads easily, the fixing screw can be lightly inserted for temporary fixing, and the same mounting as in the first embodiment. It can be fixed by construction.

As described above, according to the ventilator of the third embodiment of the present invention, since the thin film 10B is provided with the cross-shaped hole 22, the thin film 10B has a shape that is easily deformed and expanded, and the fixing screw is required with a small labor. It can be temporarily stopped.

[0027]

As apparent from the above embodiments, according to the present invention, the diameter of the fixing screw is smaller than the diameter of the fixing screw at the inlet hole and the outlet hole where the fixing screw is inserted in the flange portion and the boundary between the inlet hole and the outlet hole. Since a thin film is formed with a small hole almost in the center and the diameter of the outlet hole is smaller than the diameter of the head of the fixing screw to form the fixing hole, there is no need to prepare a separate part. It is possible to provide a ventilation device which can be temporarily fixed to the substantially central part of the device with a small force and is not deformed even when the fixing screw is strongly tightened to firmly fix the main body.

Further, since a substantially central portion of the thin film is protruded toward the outlet hole in a mountain shape to form a mountain-shaped recess at the inlet hole side, and a small hole is formed at the apex of the mountain-shaped recess to form a fixing hole. The fixing screw inserted into the fixing hole is automatically guided to the central portion of the fixing hole, the position is determined, and the fixing screw can be temporarily fixed with a small force.

Further, since the fixing hole is formed by forming a cross-shaped hole at substantially the center of the thin film, the thin film is easily deformed and spreads at the time of temporarily fixing the fixing screw, and temporarily fixing with a smaller force. can do.

[Brief description of drawings]

FIG. 1 is an enlarged view showing a relationship between a fixing hole and a fixing screw of a ventilation device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state when the ventilation device of the first embodiment is installed.

FIG. 3 is an enlarged view showing a relationship between a fixing hole and a fixing screw of the ventilation device of the second embodiment.

FIG. 4 (a) is a sectional view of a fixing hole of the ventilation device of the third embodiment, and (b) is a front view of a fixing hole of the ventilation device of the third embodiment.

FIG. 5 is a cross-sectional view showing a state in which a conventional ventilation device is installed.

FIG. 6 is an enlarged view showing a relationship between a fixing hole and a fixing screw of the ventilation device.

[Explanation of symbols]

 1 Main body 2 Ceiling surface 3 Opening 7 Flange 8 Fixing screw 8a Head 9 Fixing hole 9A Fixing hole 9B Fixing hole 9a Inlet hole 9b Exit hole 10 Thin film 10A Thin film 10B Thin film 13 Blower 20 Small hole 20A Small hole 21 Mountain-shaped recess 22 Cross hole

Claims (3)

[Claims] 1. A main body having a box shape inserted into an opening provided on a ceiling surface or a chamber wall, and having a flange portion fixed to a peripheral edge of the opening with a fixing screw, and disposed inside the main body. A blower, and a plurality of fixing holes formed by an inlet hole and an outlet hole through which the fixing screw is inserted in the flange portion, and a small hole smaller than the diameter of the fixing screw is provided at the boundary between the inlet hole and the outlet hole. A ventilator in which a fixing hole is formed by forming a thin film provided substantially in the center and forming the diameter of the outlet hole to be smaller than the diameter of the head of the fixing screw. 2. The fixing hole is formed by forming a mountain-shaped concave portion on the inlet hole side by projecting a substantially central portion of the thin film toward the outlet hole side and forming a mountain-shaped concave portion on the inlet hole side. The ventilation device according to 1. 3. The ventilator according to claim 1, wherein a fixing hole is formed by forming a cross-shaped hole substantially at the center of the thin film.