JPS6328362Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to ventilation fans, and more specifically to the shutter mounting structure of ventilation fans.

(B) Prior Art One type of ventilation fan is a pipe ventilation fan whose main body is a cylindrical interior of a pipe or the like.

Conventionally, this ventilation fan includes a cylindrical ventilation fan main body equipped with a fan, a shutter, and a separate shutter frame and shutter shaft for attaching the shutter to the rear of the main body so as to be openable and closable. To install the shutter of this ventilation fan, first attach the shutter shaft to the shutter frame, insert the shutter into the shaft from one end, and screw the other end. Next, the shutter frame with the shutter attached in this way was installed inside the ventilation fan body.

However, with this installation method, the shutter installation work is complicated, it is difficult to install the shutter frame into the ventilation fan body, and the shutter frame is required separately, which increases the cost of the ventilation fan itself.

(c) Purpose of the invention This invention was created in view of these circumstances, and aims to facilitate the installation and removal of the shutter.

(d) Structure of the device This device includes a cylindrical ventilation fan body with a fan installed therein, a shutter plate, and a support shaft that supports the shutter plate so that it can be opened and closed inside the ventilation fan body. The shutter support shaft is inserted through the ventilation fan body horizontally so that its end protrudes, and extends from one end along the outer circumferential surface of the ventilation fan body to the end surface of the ventilation fan body on the shutter open side and its inner circumferential surface. An elastic pressing piece for holding the shutter support shaft is extended in a substantially U-shape so as to press the shutter, and a stopper for determining the shutter opening angle is bent from the tip of the pressing piece so as to come into contact with the shutter plate when the shutter is opened. This is a ventilation fan made of extended pieces.

(e) Examples This invention will be described in detail based on examples shown in the figures below. Note that this invention is not limited to this.

First, in Figures 1 to 3, a ventilation fan 1 consists of a cylindrical horizontal ventilation fan body (base frame) 2, an intake port (louver) 3 and a shutter part 4 installed at the front and rear parts of the base frame, respectively.
It mainly consists of a fan 5 that is provided in the base frame 2 sequentially from the front and sucks in air, and a fan motor 6 that drives this fan. In addition, 7 is a louver fixing screw, 8 is a ventilation fan support spring, 9 is its fixing screw, 10 is a motor base, 1
1 is a motor fixing screw.

The shutter portion 4 includes a vertical disc-shaped shutter 12 that can be freely opened and closed rearward, and a shutter support shaft (shutter pin) 13 that supports the shutter.

Further, a shutter pin insertion portion (shutter rotation hole) 14 through which a shutter pin 13 is inserted is formed in the upper part of the shutter 12, and the shutter pin 13 is made of nickel chrome steel, and has a long straight line portion 15 and one side of this long straight portion. A bent portion 16 having a bent end is formed. Note that the bent portion 16 has elasticity due to its material and bent shape.

Furthermore, the base frame 2 is provided with shutter pin support holes 17 and 18, respectively, for supporting the shutter pin 13 above the horizontal central axis of the base frame 2 and symmetrically about the vertical central axis.

The bent portion 16 of the shutter pin 13 is composed of an elastic pressing piece 19 for holding the shutter pin and a stopper piece 20 for determining the shutter opening angle, as shown in FIGS.
consists of a short straight piece 21 bent to form a right angle to the long straight part 15 of the shutter pin 13, and a vertical piece 22 bent to form a substantially U-shape with this short straight piece and the long straight part 15. Consisting of This vertical piece 22 is bent at an acute angle of nearly 90 degrees with respect to the short straight piece 21, and when the plane formed by the long straight part 15 and the short straight piece 21 is made horizontal (installed state), It is bent upward so as to be in contact with the inner circumferential surface of the base frame 2. Further, the stopper piece 20 is formed by bending the tip of the vertical piece 22 into an L-shape rearward and downward in the attached state,
This tip is covered with a synthetic resin cap 23 that protects the tip.

Furthermore, the distance (A dimension) formed by the center line of the long straight portion 15 of the shutter pin 13 and the surface on the long straight portion 13 side of the tip of the vertical piece 22 is from the center of the shutter pin support holes 17 and 18 to the base frame 2.
It is formed smaller than the distance (B dimension) to the rear end surface of.

In the ventilation fan 1 configured as described above, the shutter 12 is attached as follows.

As shown in FIGS. 1 to 3, first, the shutter 12 is vertically inserted into the base frame 2 in front of the rear end thereof with the shutter pin insertion portion 14 facing upward. Next, the long straight portion 15 of the shutter pin 13 is inserted into one of the shutter pin support holes 17 and 18 of the base frame 2 with its vertical piece 22 facing upward. After passing the tip of the inserted long straight portion 15 through the shutter pin insertion portion 14 of the shutter 12, the inserted long straight portion 15 is inserted into the other shutter pin support hole 1.
Insert into 8.

After the shutter pin 13 has been inserted in this manner, when the vertical piece 22 of the shutter pin 13 is rotated backward by 90 degrees, the vertical piece 22 of the shutter pin 13 will rotate because the B dimension of the shutter pin 13 is slightly smaller than the A dimension of the base frame 2. The tip is on the upper surface of the rear end of the base frame 2, but at this time,
When the vertical piece 22 of the shutter pin 13 is pulled rearward and pressed downward, the vertical piece 22 expands rearward and passes over the rear end of the base frame 2, and the tip enters the base frame 2. At this time, the vertical piece 22 of the shutter pin 13 presses the rear end surface of the base frame 2 forward due to its elasticity, and the short straight piece 21 is in contact with the outer peripheral surface of the base frame 2, so that the long straight part 15 and the short straight part 13 are pressed forward. The straight piece 21 is held horizontally and locked so that it does not move downward. This locked state is the above-mentioned installed state, and as a result, the tip of the vertical piece 22 of the shutter pin 13 presses the inner circumferential surface of the base frame 2 upward to prevent the shutter pin 13 from coming off and moving upward. There is.

In this way, the short straight piece 21 of the shutter pin 13
By pressing the outer circumferential surface, rear end surface, and inner circumferential surface of the base frame 2, the shutter pin 13 is completely locked and fixed so that it does not move vertically or horizontally. .

Furthermore, in this attached state, as shown in FIG.
Since it extends from the tip of the shutter 12, when the shutter 12 is opened, the shutter 12 hits the tip of this stopper piece 20, and the opening angle is determined, and the cap 23 of the stopper piece 20 allows the stopper piece 20 to hit the shutter 12 when the shutter 12 is opened. This prevents noise and protects the cut end of the stopper piece 20.

As described above, since the shutter 12 can be supported by using only 131 shutter pins and inserting this pin 13 from outside the base frame 2, the shutter 12 can be easily installed and removed, and the ventilation fan 1 itself can be installed at a low cost. Can be manufactured. Furthermore, this single shutter pin 13 can support the shutter 12 and prevent the shutter 12 from opening too much.

To remove the shutter 12, first pull the stopper piece 20 of the shutter pin 13 rearward, remove the vertical piece 22 from the inner circumferential surface of the base frame 2, and take it out of the base frame 2. Next, the holding of the shutter pin 13 is released in this manner, the shutter pin 13 is pulled out in the horizontal direction, and the shutter 12 can be removed.

(f) Effects of the invention This invention provides an elastic pressing piece for holding the shutter support shaft that presses the end face of the ventilation fan body on the shutter open side and its inner circumferential surface on the support shaft that supports the shutter plate. The shutter plate can be easily attached to and detached from the ventilation fan body.

[Brief explanation of the drawing]

Fig. 1 is a front cross-sectional explanatory view showing one embodiment of this invention, Fig. 2 is a plan view thereof, Fig. 3 is a rear side view of this, and Fig. 4 is a, b, and c are views showing this shutter pin. A is its front view, B is its side view, and C is its plan view. 1... Ventilation fan, 2... Base frame, 12...
...Shutter, 13...Shutter pin, 19...
...Shutter pin elastic pressing piece, 20...Shutter opening angle determining stopper piece.

Claims (1)

[Scope of utility model registration request] The ventilation fan includes a cylindrical ventilation fan body with a fan installed therein, a shutter plate, and a support shaft that supports the shutter plate so that it can be opened and closed within the ventilation fan body,
Furthermore, this shutter support shaft is horizontally inserted through the ventilation fan main body so that its end protrudes, and extends from one end along the outer circumferential surface of the ventilation fan main body to the end surface of the ventilation fan main body on the shutter open side and its inner circle. Shutter opening angle is determined by extending an elastic pressing piece for holding the shutter support shaft, which is bent into a substantially U-shape so as to press the peripheral surface, and bent from the tip of this pressing piece so that it comes into contact with the shutter plate when the shutter is opened. A ventilation fan with an extended stopper piece.