JPS6032819Y2 - shutter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shutter device improved to prevent the shutter from flapping in the closed state.

For example, some ventilation fans are designed to lock the shutter in a closed state and prevent it from flapping by locking a connecting lever connected to the shutter with a locking piece protruding from the outer frame.

However, with this configuration, the gap between the connecting lever and the lock piece may become considerably larger than the designed value due to dimensional errors or assembly errors, and if this happens, the shutter caused by the gap may There is a problem in that the rotation range becomes large and a loud flapping sound is generated.

Therefore, the purpose of this invention is to be able to keep the gap between the interlocking member such as the connecting lever and the locking member below the design value, even if dimensional errors or assembly errors are unavoidable due to manufacturing, and to further reduce shutter flapping. An object of the present invention is to provide a shutter device that can effectively prevent such problems.

An embodiment in which the present invention is applied to a ventilation fan will be described below with reference to the drawings.

First, in Fig. 1, 1 is the main body frame of a ventilation fan, which corresponds to a ventilation frame that is inserted into a hole in the wall of a room (not shown) and is provided to communicate the inside and outside of the room, and its front side is on the side A of the room. The rear surface is open toward the outdoor B side.

Reference numeral 2 denotes a motor mounting frame provided between the upper and lower parts of the main body frame 1. The motor 3 is attached to this frame, and the blade 4 is attached to the spinner nut 5.
It is directly connected by tightening it.

In addition, 6 is a decorative frame having a bell mouth 6a surrounding the blade 4, and is glued to the front opening of the main body frame 1.

Reference numeral 7 denotes two shutters, for example, which are arranged in two stages, upper and lower, at the opening on the outdoor B side of the main body frame 1, and are rotated to open and close in the vertical direction by shaft pins 8 attached to both left and right side surfaces of the main body frame 1. Possibly supported.

A connecting lever 9 is an interlocking member, and this connecting lever 9 is arranged near the left side of the main body frame 1, and pins 10 are attached to the upper end of each shutter 7 on both upper and lower sides.
, and is displaced downward and upward as the shutter 7 rotates to open and close.

Reference numeral 11 denotes a locking piece that is a locking member protruding from the inside of the left side of the main body frame 1, and is used to lock the arm 9a integrally extended forward from the connecting lever 9 on the upper surface. The upper surface, which is the locking surface, is formed in a step-like manner so that the height gradually increases toward the base end.

Reference numeral 12 denotes a tension spring corresponding to a biasing means, which is tensioned between the connecting lever 9 and a raised piece 13 formed on the left side of the main body frame 1, and is used to hold the connecting lever 9 against the locking piece. 11 in the proximal direction.

The tension spring 12 also biases the connecting lever 9 upward, thereby biasing the shutter 7 to rotate in the closing direction.

The distal end portion of the arm 9a of the connecting lever 9 is displaced in the direction of arrow C by the urging force directed toward the proximal end of the lock piece 11 that the connecting lever 9 receives from the tension spring 12, and the upper surface of the lock piece 11 is displaced. Each stepped surface 1
1a, it is located directly above the stepped surface at the same level as the lower edge of the arm 9a (see FIG. 3).

Then, when the shutter 7 is about to rotate in the opening direction,
The downward movement of the connecting lever 9 in conjunction with this is prevented by the arm 9a coming into contact with the upper surface of the lock piece 11 and being locked therein, and thereby the shutter 7 The structure is designed to prevent flapping.

By the way, due to manufacturing errors when forming the arm 9a on the connecting lever 9 or assembly errors that occur when connecting the connecting lever 9 to the shutter 7 or when attaching the lock piece 11 to the main body frame 1, etc. , a deviation may occur in the relative positions of the arm 9a and the lock piece 11.

Regarding this point, in this embodiment, at the time of design, the arm 9a is positioned at the same level as the central stepped surface of each stepped surface 11a of the lock piece 11, as shown by the solid line in FIG. By setting this, even if the arm 9a shifts upward or downward from the set position due to manufacturing errors, assembly errors, etc. (see the chain line in Figure 3), the arm 9a will be able to maintain its position due to the spring force of the tension spring 12 as described above. The arm 9a and the lock piece 11 are displaced in the direction of the arrow C based on the movement of the lock piece 11, and the lock piece 11 is positioned directly above the step face 11a of the lock piece 11, which is at the same level as the lower edge of the arm 9a. The gap between the two can be suppressed to an extremely small one.

On the other hand, 14 is the arm 9a of the connecting lever 9.
The pull rod 16 of the operating mechanism 15 is connected to the hook hole formed at the tip.Hereinafter, in the operating mechanism 15, reference numeral 17 denotes a pull plate to which the base end of the pull rod 16 is connected, and 18
The pulling plate 17 is inserted so that it can move up and down, and the pulling plate 1
The front opening of the main body frame 1 is provided with a switch for controlling energization and disconnection of the motor 3 according to the vertical movement of the motor 7 and a locking device (none of which are shown) for holding the pull plate 17 in the lowered position. Switch box installed at the bottom, 19 is pull plate 1
This is a drawstring connected to the lower end of switch box 7 and suspended from switch box 18.

The pull plate 17 is disposed at a position shifted to the right from the arm 9a of the connecting lever 9 so that the pull rod 16 is pulled diagonally downward.

Next, the operation of the above configuration will be explained.

First, assuming that the ventilation fan is in the stopped state as shown in Figure 1,
When the pull string 19 is pulled down from this state, the pull plate 17 is pulled down in response to this, pulling the pull rod 16 diagonally downward.

Therefore, first, the arm 9a of the connecting lever 9 is displaced in the direction in which the lock piece 11 protrudes, that is, in the opposite direction of arrow C, against the spring force of the tension spring 12, and is removed from the lock piece 11.

When the arm 9a is unlocked in this way, the entire connecting lever 9 is subsequently displaced downward against the spring force of the tension spring 12, and the shutter 7 is thereby moved around the shaft pin 8. It is rotated upward and fully opened.

At this time, the arm 9a and the lock piece 11 are in a relationship as shown in FIG.

At the same time, when the shutter 7 is fully opened, the switch is turned on and the motor 3 is energized.The fan 4 is driven to rotate by the motor 3, and the air in the room A is discharged to the outside B through the main body frame 1. It is.

Note that this operating state is maintained by holding the pull plate 17 in the lowered position by the lock mechanism.

After this, when the pull string 19 is pulled down again, the pull plate 17 is pulled down a little in response, turning off the switch, cutting off the power to the motor 3, and stopping the rotation of the blades 4.

At the same time, the holding of the pull plate 17 by the lock mechanism is released, so if you release your hand from the pull string 19 after this, the connecting lever 9 will rotate in the closing direction of the shutter 7 due to the spring force of the tension spring 12. When the shutter 7 returns to its closed state, it returns to its original uppermost position as shown in FIG.

With this return, the connecting lever 9 is moved by the tension spring 12.
As a result, the arm 9a is displaced in the direction of arrow C, and the arm 9a is moved toward the proximal end of the lock piece 11.
It is located directly above the step surface of each step surface 11a of 1 that is approximately at the same level as the lower edge of the arm 9a.

Therefore, in this state (shutter 7 closed state), the outdoor B
Even if the shutter 7 is subjected to a force in the opening direction due to the wind on the side, the arm 9a is prevented from moving downward by the locking piece 11.
As a result, the shutter 7 is prevented from opening and is kept in the closed state without flapping.

Furthermore, in this case, since each stepped surface 11a of the lock piece 11 that the arm 9a comes into contact with is flat, the entire upper surface of the lock piece is inclined downward toward the tip side in order to absorb dimensional errors or assembly errors. In contrast, there is no problem that the arm 9a slides down on the upper surface of the lock piece 11 and becomes unlatched, and it is possible to reliably prevent the shutter 7 from flapping.

As is clear from the above description, in the present invention, the locking surface of the locking member protruding from the ventilation frame is formed in a stepped shape, so that the interlocking member biased toward the proximal end of the locking member by the biasing means Among the stepped surfaces of the locking surface, the locking is performed by the steps at approximately the same level, and therefore, due to unavoidable dimensional errors or assembly errors during manufacturing, the relative relationship between the interlocking member and the locking member may change. Even if there is a fluctuation in the target position, this can be absorbed and the gap between the two can be controlled to be extremely small, resulting in an excellent effect of effectively preventing the shutter from fluttering.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the entire shirt in the closed state, Fig. 2 is a front view of the main parts in the same state, and Fig. 3 shows the arm in the closed state of the shirt. FIG. 4 is an enlarged front view showing the relationship between the lock piece and the lock piece, and FIG. 4 is a front view of the main parts in the shutter open state. In the figure, 1 is the main frame (ventilation frame), 7 is the shutter, 9 is the connecting lever (interlocking member), 9a is the arm, 11 is the lock piece (lock member), and 12 is the tension spring (biasing means).
, 15 is an operating mechanism, 16 is a pull rod, 17 is a pull plate, 19
is a drawstring.

Claims (1)

[Scope of utility model registration request] A shutter pivotally installed to be openable and closable at an outdoor opening of a ventilation frame that communicates the inside and outside of the room, an interlocking member connected to the shutter and displaced as the shutter is opened and closed, and an interlocking member protruding from the ventilation frame side. A locking member that locks the member and makes it impossible to open and rotate the shutter; a biasing member that biases the interlocking member toward the proximal end of the locking member; and a biasing member that resists the biasing force of the biasing member. and an operating mechanism for displacing the interlocking member in a protruding direction of the locking member to release the lock and rotate the shutter to open, and a locking surface of the locking member with respect to the interlocking member is formed in a stepped shape. A shutter device characterized by comprising: