JP2551320Y2 - Wheel axis moving device for shutter - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a wheel axle moving device in a shutter, and particularly to a shutter storage guide of a shutter curtain at the time of winding and feeding without a complicated configuration. The present invention relates to a wheel shaft moving device for a shutter capable of preventing sliding contact of the shutter shaft in advance and performing a smooth shutter curtain elevating operation.

2. Description of the Related Art Conventionally, in a shutter device that is disposed to open and close a building opening, a shutter curtain is wound around a winding wheel that pivotally supports a wheel shaft, and the shutter curtain is opened through a shutter guide. 2. Description of the Related Art There is known an apparatus configured to perform feeding and winding to a part.

However, in this case, when the shutter curtain is moved up and down, the winding amount of the shutter curtain of the winding wheel gradually increases and decreases. It has a drawback that it not only comes into sliding contact with the guide and causes noise, but also reduces the durability of the shutter curtain due to sliding loss due to long-term use.

[Problems to be solved by the present invention] In view of the above situation, the present invention has been created to solve the conventional disadvantages, and the purpose is to eliminate the need for a complicated configuration. An object of the present invention is to provide a wheel shaft moving device for a shutter that can prevent a shutter curtain from slidingly contacting a shutter guide at the time of winding and feeding, and can perform a smooth shutter curtain lifting operation.

[Means for Solving the Problems] In order to solve the problems, a technical means adopted in the present invention is to urge and hold a wheel shaft movably provided in a horizontal direction in a direction away from a shutter guide. The wheel shaft is supported by the rotation arm so that the wheel shaft is moved by the rotation of the rotation arm. When the shutter curtain is wound, the rotation fulcrum of the rotation arm is the axis of the wheel shaft. Than the shutter guide side, the rotating arm rotates with the extension of the shutter curtain, the wheel axis moves to the shutter guide side,
When winding up the shutter curtain, the wheel shaft moves in a direction away from the shutter guide.

[Operation of the Invention] In a state where the shutter curtain is wound, the rotation fulcrum of the rotation arm is located closer to the shutter guide than the axis of the wheel shaft. In this state, the shutter curtain is wound around the wheel. Therefore, the center of gravity of the entire shutter including the shutter curtain, the wheel axis, and the like is located substantially at the axis of the wheel axis.

When the shutter curtain is extended from this state, the center of gravity of the entire shutter including the shutter curtain and the wheel shaft gradually shifts to the shutter guide side, and when the center of gravity moves from the rotation fulcrum to the shutter guide side, the rotation arm rotates. Then, the wheel shaft moves to the shutter guide side. At this time, since the wheel shaft is in a state of being balanced with the urging force, the turning arm does not largely turn and the shaft does not suddenly move.

When the shutter curtain is wound, the wheel axis moves in a direction away from the shutter guide due to the movement of the center of gravity of the entire shutter and the urging force.

[Embodiment] The configuration of the present invention will be described in detail with reference to an embodiment shown in the drawings.

In FIG. 1, reference numeral 1 denotes a storage case of a shutter device provided in an opening of a building, and brackets 2a and 2b are disposed on both side surfaces in the storage case 1 so as to face each other with a gap between the opening widths. Have been. (Because the configuration on the bracket 2b side appears symmetrically with the configuration on the bracket 2a side, only the configuration on the bracket 2a side will be described below.) The above-mentioned bracket 2a has a wheel shaft movement pivotally supporting the wheel shaft 3. A device 4 is provided, and a winding wheel 6 around which a shutter curtain 5 is wound is supported on the wheel shaft 3.

As shown in FIGS. 2 to 4, the wheel shaft moving device 4 is configured such that a resilient holder 8 is fixed to a substrate 7 and a pivotal support plate 9 faces upward from the lower surface of the resilient holder 8. And a pivot shaft is attached to the pivot plate 9.
A pivot arm 11 is pivotally connected via
The bearing members 13 into which the urging rams 12, 12,... Are fitted are slidably fitted in the horizontal direction.

The elastic holder 8 is formed by integrally bending an L-shaped holder portion 14a, 14b facing vertically and a support plate 14c, and is provided at a position facing the support plate 14c. The regulating plate 15 is screwed. The bearing member 13 fitted in the elastic holder 8 has a curved bearing surface 13a at the center and biasing elastic machines 12, 12 at the upper and lower ends of the bearing surface 13a. Are inserted in parallel to each other.

On the other hand, the turning arm 11 is composed of an upper arm 11a and a lower arm 11b bent in a U-shape in cross section, and a wheel shaft 3 is attached between the upper arm 11a and the lower arm 11b by a mounting bolt. It is pinched by 17,17.

At the lower end of the lower arm 11b, mounting holes 18, 18 are formed, and at one end of the pivot plate 9, an elongated hole 19 is formed.
Are drilled in the up-down direction, and the slot 19 of the pivot plate 9 is fitted in the recess 20 formed in the lower arm portion 11b.
It is vertically and freely rotatably connected by a pivot shaft 10. Reference numeral 21 denotes a flat washer, and reference numerals 22 and 22 denote split pins for fixing the pivot shaft 10.

The operation of the wheel shaft moving device 4 in the above-described configuration will be described with reference to FIGS. 5 (a), (b) and FIG.

First, the distance to the biasing bullet machine 12, 12 ... operating point from the pivot shaft 10 around which constitute the rotation fulcrum of the pivot arm 11 l _0, also from the pivot shaft 10 center to the wheel shaft 3 center Distance l ₁ ,
In the fully open state of the shutter curtain 10, the weight of the shutter curtain is unwound from the winding wheel 6 w _1, the shutter curtain 5 on the winding wheel 6, the total weight of the winding wheel 6 and the wheel shaft 3 w ₂ 12,12
.., The distance from the pivot shaft 10 of the rotating arm 11 to the shutter curtain extension point is defined as r, and the inclination angle of the rotating arm 11 is defined as θ.
The rotational force applied to the rotating arm 11 in the fully opened state is w ₁
Rotational force T ₁ = w ₁ × r of due to the feeding direction, the rotational force _{T 2 = w 2 × l 1} × sinθ, the rotational force T ₃ = F × l ₀ × by the biasing bullets machine 12, 12 ... by w ₂ cos θ, and each of the rotational forces T ₁ , T ₂ and T ₃ is T ₁ = T ₂ + T ₃
The balance is maintained at a stop.

Here, when a counterclockwise rotation force is applied to the winding wheel 6 by an opening / closing drive or human power, and the shutter curtain 5 is fed out by Δw from the winding wheel 6, the rotation forces T ₁ and T _{2 become} : T ₁ = (w ₁ + Δw) × r T ₂ = (w ₂ −Δw) × l ₁ × sin θ, and T ₁ becomes T ₁ > T ₂ . For this reason, the rotating arm 11
Rotates counterclockwise by Δθ. When the inclination angle of the rotating arm 11 changes to θ−Δθ, the biasing
Since the combined urging force F of 2... Increases by ΔF with the reaction force, T ₁ = (w ₁ + Δw) × r T ₂ = (w ₂ −Δw) × l ₁ × sin (θ−Δθ) T ₃ = (F−ΔF) × ₁₀ × cos (θ−Δθ), and the rotating arm 11 rotates to a position where T ₁ = T ₂ + T ₃ . Thereby, the winding wheel 6 and the wheel shaft 3 for winding the shutter curtain 5 are provided with the shutter guide 1a.
The shutter moves quickly to the side to reach an appropriate feeding position of the shutter curtain 5 from the shutter guide 1a, and holds that position.

Therefore, as shown in FIG. 5 (b), the closing operation can be performed without bringing the shutter curtain 5 into sliding contact with the shutter guide 1a, and the opening operation (clockwise rotation in FIG. 5) is performed. In addition, the winding wheel 6 and the wheel shaft 3 can be horizontally moved in a direction away from the shutter guide 1a by the biasing bullets 12, 12,..., So that the shutter curtain 5 can be smoothly moved up and down.

[Effects of the Invention] In short, in the present invention, a horizontally movable wheel shaft is urged and held in a direction away from the shutter guide, and the wheel shaft is supported by a rotating arm. The wheel shaft is moved by the rotation of the rotation arm. When the shutter curtain is wound, the rotation fulcrum of the rotation arm is located closer to the shutter guide than the axis of the wheel shaft. The rotating arm rotates with the extension of the curtain, the wheel shaft moves to the shutter guide side, and the wheel shaft moves in a direction away from the shutter guide when winding up the shutter curtain. The sliding contact of the shutter curtain with the shutter guide at the time of winding and unwinding does not require a particularly complicated structure. Not only can it prevent it from happening, it can not only perform a smooth lifting and lowering operation of the shutter curtain, but also can perform the horizontal movement of the winding wheel by the reaction force of the biasing ammunition, quickly maintaining the proper equilibrium state. In addition, the present invention has extremely useful practical effects, such as suppressing the generation of noise and vibration caused by the movement of the take-up wheel, and performing a smooth and reliable operation of raising and lowering the shutter curtain.

[Brief description of the drawings]

The drawings show one embodiment of the wheel axis moving device in the shutter according to the present invention, wherein FIG. 1 is a side sectional view of the main part, FIG. 2 (a) is a front view of the main part, FIG. 2 (c) is a plan view of the same, FIG. 3 (a) is a left side view of the elastic holder, FIG. 3 (b) is a front view of the same, FIG. 4 (a) ) Is a left side view of the bearing member, FIG. 4 (b) is a front view of the same, FIGS. 5 (a) and (b) are operation explanatory diagrams of main parts, and FIG. 6 is an operation explanatory diagram showing a wheel shaft moving state. It is. In the figure, 3 ... wheel axis, 4 ... wheel axis moving device, 5 ...
Shutter curtain, 6 ... winding wheel, 11 ... rotating arm, 12, 12 ... biasing machine, 13 ... bearing member.

Claims (1)

(57) [Scope of request for utility model registration] 1. A wheel shaft movably provided in a horizontal direction is urged and held in a direction away from a shutter guide, and the wheel shaft is supported by a rotating arm. When the wheel axle is moved and the shutter curtain is wound, the rotation fulcrum of the rotation arm is located closer to the shutter guide than the axis of the wheel axle. A wheel shaft moving device for a shutter, wherein the wheel shaft moves in a direction away from the shutter guide when the moving arm rotates to move the wheel shaft to the shutter guide side and wind the shutter curtain.