JPH0522726Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a shutter device for opening and closing an opening used in a ventilation fan, ventilation window, etc.

(b) Prior art As a technology prior to this invention, Utility Application No. 55-128129
There is a shutter device described in Microfilm No. (Utility Model Application Publication No. 57-50587). The shutter device is the 6th
As shown in the figure, a shutter plate 2 is pivotally supported on a frame 1 so as to be openable and closable, and the shutter plate 2 is attached to an interlocking rod 4 through a long hole 3.
The interlocking rod 4 is formed into an L shape and connected to the spring body 5.
The shutter plate 2 is biased upward by the switch 4 and pulled by the interlocking lever pulling down mechanism 6 formed by the switch 4.
Protrusions 7 and 8 that come into contact with the upper and lower rear edges of the interlocking rod 4 when closed are formed on the frame 1, and protrusions 9 that come into contact with the lower edge of the interlocking rod 4 when the shutter plate 2 is opened are formed on the frame 1.
is formed.

When the shutter plate 2 is closed, it is in the state shown in FIG. 6, and when a force is applied to open the shutter plate 2 due to a change in wind pressure, the interlocking rod 4 tries to move forward, but the protrusion 7 By coming into contact with the shutter plate 8, its movement is prevented and the shutter plate 2 is prevented from flapping.

When the shutter plate 2 is opened, the interlocking rod 4 moves downward along the elongated hole 3 due to the tension of the interlocking rod pull-down mechanism 6, and after retracting from the protrusions 7 and 8, is further pulled down and the shutter plate 2 is pulled down. is opened, and the opening angle of the shutter plate 2 is determined by the interlocking rod 4 coming into contact with the protrusion 9. Protrusion 9 of interlocking lever pulling down mechanism 6
The tension block caused by this is absorbed by the spring body 10.
When the interlocking lever pull-down mechanism 6 is pulled down, it is held in that state, and when it is pulled down again, the holding is released.

(c) Problems to be solved by the invention The shutter device shown in the prior art can prevent the shutter plate 2 from flapping when it is closed, and can perform stable opening without flapping when it is opened. It can be said that its action is determined by the positional relationship between the projections 7, 8, 9 and the interlocking rod 4.

In the conventional technology, it is easy to control the dimensional accuracy of the interlocking rod 4, but it is difficult to control the positional accuracy of the projections 7, 8, 9, especially the projections 8, 9 relative to the frame 1. It was hot.

That is, the positions of the protrusions 8 and 9 are calculated from a predetermined reference point, but if an error occurs in the frame 1, the positions of the protrusions 8 and 9 will naturally be affected. Further, the dimensions from the reference point are designed to have tolerances, and the larger the dimensions, the lower the accuracy will be.

As a result, it is necessary to individually control the accuracy of the protrusions 8 and 9, and if a malfunction occurs due to an error or mistake, it is necessary to perform rework at two locations, and the interlocking rod 4 has to be reworked. In this case, it becomes even more troublesome.

In view of the shortcomings of the conventional technology, the technical object of the present invention is to simplify the structure of a shutter device, improve accuracy, and reduce the number of points to be controlled during manufacturing.

(d) Means for solving the problems One structure of the present invention is shown in Figs. 1 to 3, other structures are shown in Figs. 4 and 5, and the structure of the present invention is illustrated based on both structures. explain.

A shutter plate 1 is attached to a square cylindrical frame 11 with a pivot 12.
3, and an interlocking rod 15 is pivotally supported on the shutter plate 13 via a long hole 14 extending in the vertical direction. The shutter plate 13 is opened and closed in conjunction with the interlocking rod 15.

The interlocking rod 15 is formed into a substantially shape, and a projecting piece 17 extending downward is formed in the middle of the horizontal rod portion 16. However, in the structures shown in FIGS. 4 and 5, the protruding piece 18, which has the same effect as the protruding piece 17, is attached to the interlocking rod 1.
The shutter plate 13 at the bottom of the vertical rod portion 19 of No. 5
It is formed at the upper part of the cardinal part of.

Triangular protrusions 20, 21, and 22 are formed on the upper front edge of the interlocking rod 15 and the front edges of the tips of the projecting pieces 17 and 18.

When the shutter plate 13 is closed, the triangular protrusion 2
Located in front of 0, 21, 22, triangular process 2
Projections 23, 24, 25 that come into contact with 0, 21, 22
protrudes from the frame 11.

When the shutter plate 13 is opened, the lower edge of the horizontal rod part 16 of the interlocking rod 15 comes into contact with the protrusion 21 in FIGS. 1 to 3, and the lower edge of the vertical rod part 19 in FIGS. The protrusion 25 abuts on a protrusion 26 extending horizontally on the edge.

The initial movement of the shutter plate 13 from closing to opening is caused by the downward movement of the interlocking rod 15 along the elongated hole 14, so that the projections 20, 21, 2
By shifting the opposing positions of the two, the interlocking rod 15 can be moved forward.

A spring body 27 is tensioned between the interlocking rod 15 and the frame body 11, and the interlocking rod 15 is always urged upward by the spring body 27. The interlocking rod 15 is pulled by an interlocking rod pulling down mechanism 28 formed at the bottom of the frame 11. After the operating rod 30 operated by the pull string 29 of the interlocking rod pull-down mechanism 28 is moved by pulling down the draw string 29, it is locked so that it will not be pulled back from the position where the pull string 29 was pulled down, and when the pull string 29 is pulled down again. The lock is released and can be pulled back. The operating rod 30 and the interlocking rod 15 are connected by a spring body 31. The tensile force between the spring body 31 and the spring body 27 is greater in the spring body 27, and the interlocking rod 15 is not pulled down by the tensile force of the spring body 31.

The configuration of this invention is a shutter plate 13 and a long hole 1.
4, the interlocking rod 15, the protrusions 24, 25, the spring body 27, and the interlocking rod pull-down mechanism 28, the specific structure, so-called material, shape, etc., are known, well-known, It can be implemented with various modifications within the conventional technical scope. Further, it may be implemented only as a function of a shutter device, or may be implemented by being incorporated into a ventilation fan as in the embodiment described later.

Regarding the relationship between the connecting rod 15 and the protrusions 24, 25 of the frame 11, which are directly related to the effects of the present invention, the protrusions 24, 25 may be formed integrally with the frame 11, or may be attached as separate parts. You may. Projections 24, 25
The protrusions 21, 2 which are the parts of the connecting rod 15 that come into contact with the
2 also need not be triangular, but may be arcuate or square.

(e) Effect In the present invention, the protrusion that prevents the shutter plate 13 from flapping when it is closed and the protrusion that prevents it from shaking when the shutter plate 13 is opened are provided in a single protrusion 24 and 25. , protrusions 24, 25
By simply controlling the position of the shutter plate 13 relative to the frame 11, the shape of the protrusions 24 and 25, and specifically the accuracy of the upper and lower lengths, it is possible to fully demonstrate the function of the shutter plate 13 when closed and opened. This can be done by modifying the single protrusions 24 and 25.

(F) Embodiment One structure shown in FIGS. 1 to 3 and other structures shown in FIGS. 4 and 5 will be explained in more detail in detail.

Figures 1 to 3 show the structure used in the ventilation fan.

The frame 11 is formed by bending and joining sheet metal into a rectangular cylindrical shape, and has a flange 32 stretched on the front edge on the indoor side. A support rod 33 is installed between the upper wall and the lower wall of the frame 11,
An electric motor 34 is attached to the center of the support rod 33.
A blower blade 37 is detachably attached to a rotating shaft 35 of the electric motor 34 by a spinner 36 . A front cover body 38 made of synthetic resin is detachably attached to the collar portion 32, and a wind tunnel 39 surrounding the blowing blades 37 is integrally formed in the front cover body 38.

The shutter plate 13 is formed by bending a sheet metal, and has reinforcing walls formed on both sides. A pivot hole is formed in the reinforcing wall, and a pivot shaft 12 protruding from the frame body 11 is inserted and pivoted therein. Note that the pivot 12 may be provided protruding from the reinforcing wall and supported in a pivot hole of the frame 11. Frame body 11
If it is difficult to protrude the pivot 12 because it is made of sheet metal, a synthetic resin pivot rod with the pivot 12 protruding may be attached to the frame 11.

A long hole 14 is formed in the interlocking rod 15, and the shutter plate 1
3 is inserted into the long hole 14 to connect the shutter plate 13 and the interlocking rod 15. Note that a long hole 14 may be formed in the reinforcing wall of the shutter plate 13, and a connecting pin 40 may be formed in the interlocking rod 15 for connection. Alternatively, a round hole may be formed on one side and a long hole 14 on the other side, and a hole may be formed through both. They may be connected using a separate connecting pin 40. That is, the interlocking rod 15 may be connected to the shutter plate 13 as long as it is rotatable and at the same time movable within a certain range up and down.

The upper and lower parts of a certain range of the interlocking rod 15 are the protrusions 20 and 2.
1 refers to the amount of movement that can be avoided from the protrusions 23 and 24.

When the shutter plate 13 is closed, the interlocking rod 15 is in contact with the protrusions 23 and 24 at the upper and lower portions, so that forward movement of the interlocking rod 15 can be reliably prevented. The contact position of the lower part of the interlocking rod 15 to the protrusion 24 is located at the pivot point 12 of the shutter plate 13.
The front part of the interlocking rod 15 is an appropriate position, and the interlocking rod 15 can be made compact, and the lower frame 11 of the interlocking rod 15 can be formed in a small size.
It is possible to secure a space in the interior where there are no moving objects. The secured space can not only be used as a mounting area for the interlocking rod pulling down mechanism 28, but also as a storage and mounting area for the motor when the motor pulls the interlocking rod 15, and in the case of a ventilation fan, it can be used as a mounting area for the drive capacitor of the electric motor 34. Also serves as a mounting part.

The interlocking rod pull-down mechanism 28 also serves as a control switch for the electric motor 34, and a switch contact built into the operating rod 30 is turned on.

After the interlocking rod 15 is moved downward by the dimension of the elongated hole 14 and the projections 20, 21 are released from contact with the protrusions 23, 24, the interlocking rod 15 is further pulled down and moved forward and downward. As the interlocking rod 15 moves forward and downward, the interlocking rod 15 does not come into contact with the protrusion 23 again. However, even if the contact between the protrusion 24 of the protrusion 21 is released, the protrusion 2
4, the front edge of the protruding piece 17 comes into contact with the protruding part 24 again in this structure. Therefore, the notch 41 is formed in the protruding piece 17,
The upper edge does not contact the interlocking rod 15 before contacting the lower edge of the horizontal rod portion 16.

In this structure, the notch 41 is formed by forming the protrusion 21 on the protruding piece portion 17, but the protrusion 21 may be formed by forming the notch 41. Protrusion 20
The upper edge of the protrusion 21 is an inclined edge that slopes downward toward the front, and when the shutter plate 13 shifts from the open state to the closed state, the protrusions 20, 21 are formed on the lower edges of the protrusions 23, 24.
Even if the protrusions 20 and 21 come into contact with each other, the protrusions 20 and 21 are guided and reliably positioned behind the protrusions 23 and 24 without being prevented from moving upward further.

In the other structure shown in FIGS. 4 and 5, a protruding piece 18, a protrusion 22, a protruding part 25, and a protruding piece 26 (corresponding to the horizontal rod part 16 of the above-mentioned structure) are formed on the lower front edge of the interlocking rod 15. Its operation is similar to the structure described above.

In this structure, when the protrusion 22 comes off from the protrusion 25 due to the downward movement of the interlocking rod 15 by the elongated hole 14, the interlocking rod 15 is not located behind the protrusion 25, so that the notch 41 is removed as in the above structure. No need to form. When the shutter plate 13 is opened, the protrusion 26 comes into contact with the protrusion 25 and regulates the opening angle of the shutter plate 13. In this structure, a protrusion 42 is formed at the rear end of the protrusion 26, so that the connecting rod The protrusion piece 26 and the protrusion 25 do not come out of contact due to the movement of the protrusion 15 back and forth. Movement of the connecting rod 15 is caused by gaps and dimensional errors between the connecting parts.

In this structure, the spring bodies 27 and 31 are connected to the interlocking rod 15.
Although the horizontal rod portion 16 is used as a portion to be engaged with, the horizontal rod portion 16 is not particularly required in this structure, and only the vertical rod portion 19 is sufficient. In a structure in which the interlocking rod 15 is formed only by the vertical rod portion 19, the spring body 27 is installed between the upper wall of the frame 11 and the upper half of the interlocking rod 15, and the interlocking rod 15 is It is more compact, and material removal when punching out the interlocking rod 15 from sheet metal is also improved.

In this structure, the protrusion 25 is the pivot point 1 of the shutter plate 13.
In a structure in which the pivot 12 is formed separately from the frame 11 by being located above the frame 11 and then formed on a synthetic resin pivot rod that is attached, the protrusion 25 is integrally formed on the pivot rod. This improves the accuracy of the positional relationship between the pivot 12 of the shutter plate 13 and the protrusion 25.

In each of the above-mentioned structures, since the shutter plate 13, interlocking rod 15, and frame 11 are made of sheet metal, contact noise is generated when opening and closing. May be worn.

(G) Effect of the invention The present invention has a protrusion on the frame that has the function of regulating the movement of the interlocking rod when the shutter plate is closed and opened, thereby reducing the protrusion in the relationship between the shutter plate and the interlocking rod. In addition to improving the positional accuracy, quality control and rework for malfunctions become easier.

[Brief explanation of the drawing]

Figures 1 to 5 show the present invention.
The figure is a cross-sectional view of the ventilation fan, Figure 2 is a cross-sectional view with the shutter plate closed, Figure 3 is a cross-sectional view with the shutter plate open, Figure 4 is a cross-sectional view with the shutter plate of a different structure closed, and Figure 5 is a cross-sectional view with the shutter plate closed. FIG. 6 is a cross-sectional view of the shutter plate in an open state, and FIG. 6 is a cross-sectional view of the conventional technology. 11... Frame body, 12... Pivot, 13... Shutter plate, 14... Long hole, 15... Interlocking rod, 16...
Horizontal rod portion, 17, 18... Protruding piece portion, 19... Vertical rod portion, 20, 21, 22... Protrusion, 23, 24,
25...protrusion.

Claims (1)

[Scope of utility model registration request] A plurality of shutter plates supported on a cylindrical frame so as to be openable and closable; an interlocking rod connected to the shutter plates through elongated holes extending in the vertical direction so as to open and close the shutter plates in conjunction with each other; a protrusion formed on the frame body that abuts the interlocking rod to restrain lateral movement of the interlocking rod and also abuts the interlocking rod when the shutter plate is opened to restrain downward movement of the interlocking rod; A shutter device comprising: a spring body that biases the shutter plate upward; and an interlocking lever pull-down mechanism that moves the interlocking lever downward along a long hole against the spring body and further lowers the shutter plate to open the shutter plate.