JP2596050Y2 - Shutter shock absorber - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a shock absorbing device for a shutter, and more particularly to a shock absorbing device which can reduce a shock caused by a collision between a shutter plate of a shutter slat and a lintel of a shutter case. The present invention relates to a shutter buffer device capable of avoiding generation and the like and easily unwinding a shutter slat.

[0002]

2. Description of the Related Art As a shutter, there are shutters shown in FIGS. In the figure, 102 is a building, 104 is an opening, 106 is a down wall, 108 and 108 are columns, and 110 is a floor. The shutter 112 that opens and closes the opening 104 of the building 102 includes a shutter case 114 attached to the down wall 106 above the opening 104 and a shutter 112.
Guide rails 116 on both sides of pillars 108
Is installed. The shutter case 114 includes brackets 118, 118 and a case plate 120 attached to the brackets 118, 118. In the shutter case 114, a shutter shaft 124 is mounted between the brackets 118 by bearings 122.

A plurality of shutter wheels 126 are rotatably supported on a shutter shaft 124. One end of a shutter slat 128 connected and formed into a single plate is attached to the shutter wheel 126. The shutter slat 128 wound up (in the direction of arrow A) and unwound (in the direction of arrow B) by the shutter wheel 126
A seat plate 134 is attached and provided on the other end side protruding from the entrance 132 between the doors 30 and 130, and the guide rails 116 are provided on both sides.
• Supported by 116.

A take-up spring 136 is provided between the shutter shaft 124 and the shutter wheel 126. The take-up spring 136 applies a force to the shutter wheel 126 in a direction in which the shutter slat 128 is taken up. The shutter slat 128 is wound around the shutter wheel 126 by the force in the winding direction of the winding spring 136 above the balance point C, with the center at the balance point C between its own weight and the force in the winding direction of the winding spring 136. At a position below the balance point C, the sheet is unwound from the shutter wheel 126 by its own weight.

[0005]

By the way, the shutter slat 128 of the shutter 112 is wound on the shutter wheel 126 above the balance point C by the force in the winding direction of the winding spring 136.
This facilitates the winding of the shutter slat 128.

However, the speed of the shutter slat 128 in the winding direction increases at the end of the winding of the shutter slat 128. Therefore, the shutter slat 128 has a problem that the seat plate 134 collides with the lintels 130 of the shutter case 114 at a high speed.
The lintel 13 between the seat plate 134 and the shutter case 114
The collision with 0.130 generates a loud impact sound and the building 1
02 causes vibration on the descending wall 106 of the shutter 11
There were inconveniences such as loose mounting of 2 and damage / cracking of the building 102.

In order to solve such inconvenience, conventionally,
The cushion rubber (not shown) was attached to the seat plate 134,
There was a problem in that a sufficient shock-absorbing function could not be performed, and an impact sound was generated, and the ceiling 138 near the down wall 106 vibrated.

Further, the shutter slat 128 requires a large force in the initial stage of unwinding the shutter slat 128, so that there is a disadvantage that the shutter slat 128 cannot be easily unwound. Furthermore, a shock absorber provided with a shock spring for generating a spring force in a direction opposite to the winding spring of the shutter slat has been proposed (Japanese Utility Model Laid-Open No. 54-128336, Japanese Utility Model Laid-Open No. 2-93500, Japanese Utility Model Application No. No. 62-141897),
In these shock absorbers, the other end of the buffer spring whose one end is free is fixed to the shutter shaft or the shutter wheel. Therefore, when the buffer spring is twisted to generate a spring force, the fixed portion of the shock spring is fixed. There is a problem that an excessive load acts on the.

[0009]

Therefore, in order to eliminate the above-mentioned disadvantage, the present invention provides a shutter shaft rotatably mounted on a shutter shaft mounted on a shutter case, and winding by the shutter wheel. A shutter provided with a shutter slat to be taken and unwound, and a shutter provided with a take-up spring for applying a force in a direction to wind the shutter slat to the shutter wheel, wherein a guide shaft is provided on the shutter wheel in parallel with an axial direction of a shutter shaft. A cylindrical mounting body is mounted on the shutter shaft so as to face the guide shaft, and an engaging portion is provided on the mounting body so as to protrude in a radial direction of the shutter shaft, and the shutter slat is wound. A shock absorber for applying a force in the unwinding direction to the shutter wheel at the end of picking and at the beginning of unwinding. A ring is provided by being wound around the shutter shaft, and an engaging portion of the mounting body is slidably provided in a spring gap of the buffer spring, and the shutter wheel side end of the buffer spring is provided at a shutter wheel side end of the buffer spring. A fitting portion is provided to be axially movably fitted to the guide shaft to rotate the buffer spring by rotation, and the end of the shutter slat winding and unwinding are provided at the end of the mounting body of the buffer spring. In the initial stage, a contact portion for contacting the engaging portion of the mounting body is formed and provided to prevent rotation of the buffer spring due to rotation of the shutter wheel.

[0010]

According to the structure of the present invention, when the shutter slat is wound using the force in the winding direction of the winding spring from the state where the shutter slat is completely unwound, the shutter wheel is wound. Direction, the buffer spring is rotated. In the shock absorber, when the shutter slat is wound on the shutter wheel and winding is completed, the abutting portion of the shock absorber on the mounting body side end is in contact with the engaging portion of the mounting body to prevent rotation of the shock spring. As a result, the buffer spring generates a spring force and exerts a force in the direction of unwinding the shutter wheel. Thus, in the shock absorber, at the end of the winding of the shutter slat, the force in the winding direction by the winding spring is reduced by the buffer spring, and the speed of the shutter slat can be reduced.

[0011] When the shutter is unwound from the state in which the shutter slat is completely wound up against the force in the winding direction of the winding spring, the shutter wheel is rotated in the unwinding direction. In the initial stage of the unwinding, the shock-absorbing device is prevented from rotating, and the shock-absorbing spring that generates the spring force by the contact between the contact portion at the end of the attachment body and the engaging portion of the attachment unwinds the shutter wheel. A directional force is applied. Thus, in the shock absorber, at the initial stage of unwinding of the shutter slat, the force in the winding direction by the winding spring is reduced by the buffer spring, and the force required for unwinding can be reduced. Further, in this shock absorber, the fitting portion formed at the shutter wheel side end of the shock spring is axially movably fitted to a guide shaft provided to protrude from the shutter wheel, so that the shock spring is spring-loaded. The load acting on the fitting portion when a force is generated can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 8 show an embodiment of the present invention. 7 and 8, 2 is a building, 4 is an opening, 6 is a down wall, 8.8 is a pillar, and 10 is a floor. Building 2
The shutter 12 that opens and closes the opening 4 is provided with a shutter case 14 on the down wall 6 above the opening 4 and guide rails 16 on both sides of the opening 4.
Is installed. The shutter case 14 includes brackets 18 and a case cover 20 attached to the brackets 18. In the shutter case 14, a shutter shaft 24 is mounted between the brackets 18 by bearings 22.

A plurality of shutter wheels 26 are rotatably supported on the shutter shaft 24. The shutter wheel 26 is, as shown in FIGS.
The cylindrical body 28 is rotatably supported on the shutter shaft 24 via a spacer 30. An auxiliary shaft 32 is provided between the intermediate shutter wheels 26.
Is installed.

One end of a shutter slat 34 connected to and formed in a single plate is attached to the shutter wheel 26. The shutter slats 34 that are wound (in the direction of arrow A) and unwound (in the direction of arrow B) by the shutter wheel 26 have a seat plate 40 at the other end protruding from an entrance 38 between the lintels 36 of the shutter case 12. Installed and provided on both sides with guide rails 16
Supported by

A take-up spring 42 is provided between the shutter shaft 24 and the shutter wheel 26. The take-up spring 42 is configured to take up the shutter slat 34 around the shutter wheel 26 (arrow A).
Direction). The shutter slat 34 has an arrow on the shutter wheel 26 by the force in the winding direction of the take-up spring 42 above the balance point C around the balance point C between its own weight and the force in the take-up direction of the take-up spring 42. A is wound in the direction A, and below the balance point C, the shutter wheel 26
Is unwound in the direction of arrow B.

In such a shutter 12, at the end of winding of the shutter slat 34 and at the beginning of unwinding, the force in the winding direction by the winding spring 42 is weakened, and the lintel 36 between the seat plate 40 and the shutter case 14 is formed.・ 3
6 is provided to alleviate the collision with the shock absorber 6. The buffer device 44 has a buffer spring 46 for applying a force in the direction of unwinding (in the direction of arrow B) to the shutter wheel 26 at the end of winding of the shutter slat 34 and at the beginning of unwinding.
Is provided.

As shown in FIG. 1 and FIG.
A guide shaft 48 is provided on the shutter wheel 26 so as to protrude in parallel with the axial direction of the shutter shaft 24.
Mounting body 5 attached to the shaft so as to face the guide shaft 48
0 is provided. As shown in FIGS. 3 and 4, the mounting body 50 is provided with an engaging portion 52 protruding in the radial direction of the shutter shaft 24. Further, the mounting body 50 is provided with a plurality of mounting holes 54 formed at symmetric positions in the circumferential direction. The mounting body 50 is positioned and mounted by inserting an appropriate fixing tool 58 into the mounting hole 54 and a fixing hole 56 formed in the shutter shaft 24.

The buffer spring 46 extends from the shutter wheel 26 side to the mounting body 50 side, and the shutter shaft 2 is moved in the direction in which the shutter slat 34 is unwound (in the direction of arrow B).
4 is provided. This buffer spring 46
The engaging portion 52 of the attachment body 50 is slidably engaged with the spring gap 60.

A fitting portion 64 is formed and provided at the shutter wheel side end 62 of the buffer spring 46. The fitting portion 64 connects the buffer spring 46 to the shutter wheel 2.
In order to be rotated by the rotation of No. 6, that is, to co-rotate, a guide shaft 48 provided on the shutter wheel 26 is fitted so as to be movable in the axial direction. Thus, the buffer spring 46 is provided between the shutter shaft 24 and the shutter wheel 26.

The mounting body side end 6 of the buffer spring 46
6 is provided with a contact portion 68 formed therein. Contact part 68
At the end of winding of the shutter slat 34 and at the beginning of unwinding, the engaging portion 52 of the attachment body 50 is provided to prevent the rotation of the buffer spring 46 due to the rotation of the shutter wheel 26, that is, to prevent corotation. Contacted.

As a result, the buffer spring 46 is brought into contact with the engaging portion 52 of the mounting body 50 at the end of winding of the shutter slat 34 and at the beginning of unwinding, and cooperates with the shutter wheel 26. The rotation of the shutter wheel 26 is prevented, and a force is applied to the shutter wheel 26 in the direction of unwinding (in the direction of arrow B).

Accordingly, at the end of winding of the shutter slat 34 and at the beginning of unwinding, the buffer spring 46 applies a force in the unwinding direction (the direction of arrow B) to the shutter wheel 26 and the shutter shaft 24 and the shutter. It is provided between the wheel 26.

The free length L, the number of turns N, and the spring constant k of the buffer spring 46 and the mounting member 50 provided with an engaging portion 52 for preventing the buffer spring 46 from rotating together with the shutter wheel 26 are attached to the shutter shaft 24. The mounting position is set in consideration of the force in the winding direction by the winding spring 42, the weight of the shutter slat 34, and the like.

That is, at the end of winding of the shutter slat 34 and at the beginning of unwinding, the shock absorber 44 applies a force in the unwinding direction (the direction of arrow B) to the shutter wheel 26 and winds up by the winding spring 42. Weaken the force in the direction, the lintel 36.3 of the seat plate 40 and the shutter case 14
In order to alleviate the collision with the shutter 6, the free length L of the buffer spring 46, the number of turns N, the spring constant k, and the mounting position of the engaging portion 52 to the shutter shaft 24 are set.

Next, the operation will be described.

The shutter 12 has a shutter slat 3
When the shutter slat 34 is wound in the direction of arrow A by using the force in the winding direction of the winding spring 42 from the state in which the shutter wheel 26 is completely unwound, the shutter wheel 26 is rotated in the winding direction. In this state, as shown in FIG. 6, the buffer spring 46 of the buffer device 44 does not function because the engaging portion 52 of the attachment body 50 is in the intermediate spring gap 60 and generates a spring force. I didn't let it.

The buffer spring 46 is provided with a fitting portion 64 provided at the end 62 on the shutter wheel side.
The shutter slat 34 is rotated in the direction in which the shutter slat 34 is wound (along arrow A) together with the shutter wheel 26 by being fitted to the guide shaft 48 provided on the shaft 6 so as to be movable in the axial direction.

At this time, the rotating buffer spring 46 is rotated.
Is wound in the direction in which the shutter slats 34 are unwound (in the direction of arrow B) from the shutter wheel 26 side to the mounting body 50 side, so that the engagement engaged with the spring gap 60 from the initial to the middle of winding. It is rotated along the part 52 and is moved to the shutter wheel 26 side. Therefore, the buffer spring 46 does not function and does not generate a spring force.

The buffer spring 46 which is moved while rotating toward the shutter wheel 26 has a shutter slat 3
4 is wound around the balance point C, and at the end of winding, as shown in FIG. 5, the contact portion 68 provided on the attachment body side end 66 is brought into contact with the engaging portion 52, and the shutter wheel 2 is rotated.
6 is prevented from rotating around.

The buffer spring 46 is rotated at the shutter wheel side end 62 by the fitting portion 66, and is prevented from rotating at the mounting body side end 66 by the engaging portion 52, thereby generating a spring force. Become. This spring force acts on the shutter wheel 26 in a direction in which the shutter wheel 26 is unwound (in the direction of arrow B). In addition, the spring force gradually increases as the winding of the shutter slat 34 progresses, so that the shutter wheel 26
The force in the unwinding direction is gradually increased.

Thus, at the end of the winding of the shutter slats 34, the shock absorbers 44 function to gradually increase the force in the unwinding direction on the shutter wheel 26 to act on the shutter slats 34. At the end of the winding operation of the shutter 34, the force in the winding direction by the winding spring 42 is reduced, and the speed at which the shutter slat 34 is wound can be reduced.

For this reason, the impact caused by the collision between the seat plate 40 of the shutter slat 34 and the lintels 36 of the shutter case 14 can be reduced, and loose mounting of the shutter 12 and breakage and cracking of the building 2 can be prevented. Can be avoided.

The shutter 12 has a shutter slat 3
When the shutter slat 34 is unwound in the direction of arrow B against the force of the winding spring 42 in the winding direction from the state where the winding 4 is completely wound, the shutter wheel 26 is rotated in the unwinding direction. The buffer spring 46 is configured such that the fitting portion 64 provided at the shutter wheel side end 62 is fitted to the guide shaft 48 of the shutter wheel 34 so as to be movable in the axial direction, so that the shutter wheel side end 62 is The slat 34 is rotated in the unwinding direction.

In the initial stage of unwinding of the shutter slat 34, the buffer spring 46 is prevented from rotating the mounting body side end 66 by the engaging portion 52 as shown in FIG. A force in the unwinding direction (direction of arrow B) is applied. Therefore, in the initial stage of unwinding of the shutter slat 34, the force in the winding direction by the winding spring 42 is weakened, so that the force required for unwinding can be reduced. For this reason,
The shutter slats 34 can be easily unwound.

When the unwinding of the shutter slats 34 progresses, the buffer spring 46, which is prevented by the engaging portion 52 from rotating the end 66 on the mounting body side and is rotated in the direction of unwinding the end 62 on the shutter wheel side, moves to the shutter wheel 26. The force in the unwinding direction (direction of arrow B) to be applied gradually decreases.
When the buffer spring 46 has passed the initial stage of unwinding of the shutter slat 34, the contact portion 68 of the attachment body side end 66 is separated from the engaging portion 52.

As a result, the buffer spring 46 does not function, and does not generate a spring force. The buffer spring 46 is provided on the fitting portion 6 provided at the shutter wheel side end 62.
The shutter slat 28 is rotated together with the shutter wheel 26 in the direction of unwinding the shutter slat 28 (the direction of arrow B) by fitting the shutter slat 28 with the guide shaft 48 provided on the shutter wheel 26 so as to be movable in the axial direction.

The rotated buffer spring 46 is wound from the shutter wheel 26 toward the mounting body 50 in the direction in which the shutter slat 34 is unwound (in the direction of arrow B). Engaging portion 52
And is moved to the mounting body 50 side. Thereafter, the buffer spring 46 does not function from the middle stage to the final stage of unwinding, and does not generate a spring force. Therefore, the shutter slats 34 are not unwound rapidly, and no impact is generated due to the collision between the seat plate 40 and the floor 10 at the end of unwinding. Further, the shock absorber 44 includes a fitting portion 64 formed at the shutter wheel side end 62 of the shock spring 46, and
When the cushioning spring 46 generates a spring force, the load acting on the fitting portion 64 can be reduced by fitting the guide shaft 48 movably fitted in the guide shaft 48 protruding from the fitting shaft 64. It is possible to avoid the risk of cracking, cutting, or the like of the joint portion 64, and it is possible to further reduce the number of parts.

[0038]

As described above, according to the shock absorber of the present invention, when the shutter slat is wound up, the shock is generated by the shock spring and the force in the direction of unwinding the shutter wheel is applied. At the end of the winding of the slat, the force in the winding direction by the winding spring can be reduced by the buffer spring, and the unwinding speed of the shutter slat can be reduced. For this reason, it is possible to alleviate the impact due to the collision between the shutter plate of the shutter slat and the shutter case, and to avoid loose mounting of the shutter, breakage or cracking of the building, and the like.

In the shock absorbing device of the present invention, the spring force generated by the buffer spring acts on the shutter wheel in the unwinding direction at the beginning of unwinding of the shutter slat, so that the shutter slat is unwound. At the beginning of unwinding, the force in the winding direction by the winding spring is weakened by the buffer spring, so that the force required for unwinding the shutter slats can be reduced. For this reason, the shutter slat can be easily unwound.
Further, in this shock absorber, the fitting portion formed on the shutter wheel side end of the shock spring is axially movably fitted to a guide shaft provided so as to protrude from the shutter wheel. When a force is generated, the load acting on the fitting portion can be reduced, the risk of cracking, cutting, or the like of the fitting portion can be avoided, and the number of components can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a shutter shock absorber showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a front view of the mounting body.

FIG. 4 is a side view of the mounting body.

FIG. 5 is a perspective view showing an end state of winding of a shutter slat of the shock absorber and an initial state of unwinding.

FIG. 6 is a perspective view showing a state in which the shutter slats of the shock absorber are wound from an initial stage to a middle stage and an unwinding stage is in a middle stage to an end stage.

FIG. 7 is a partially cutaway front view of the shock absorbing device of the shutter.

FIG. 8 is a partially cutaway front view of a shutter provided with a shock absorber.

FIG. 9 is a partially cutaway front view of a shutter showing a conventional example.

FIG. 10 is a right side view of FIG. 9;

FIG. 11 is a plan view of FIG. 9;

[Explanation of symbols]

 2 building 4 opening 12 shutter 14 shutter case 16.16 guide rail 24 shutter shaft 26 shutter wheel 34 shutter slat 36 lintel 40 seat plate 42 take-up spring 44 buffer device 46 buffer spring 48 guide shaft 50 mounting body 52 engaging portion 54 Mounting hole 58 Fixture 60 Spring gap 64 Fitting part 68 Contact part

Claims (1)

(57) [Scope of request for utility model registration] A shutter wheel is rotatably supported on a shutter shaft mounted on a shutter case, a shutter slat wound and wound by the shutter wheel is provided, and the shutter slat is wound around the shutter wheel. In a shutter provided with a take-up spring for applying a force in a taking direction, a guide shaft is provided on the shutter wheel so as to protrude in parallel with an axial direction of a shutter shaft, and a cylindrical mounting body is provided facing the guide shaft. It is attached to the shutter shaft and provided with an engaging portion protruding in the radial direction of the shutter shaft on this attachment body, and the force in the direction of unwinding to the shutter wheel at the end of winding of the shutter slat and at the beginning of unwinding. A buffer spring to be actuated is wound around the shutter shaft and provided. An engagement portion of the mounting body is slidably provided in the ring gap, and is axially moved to the guide shaft at the shutter wheel side end of the buffer spring to rotate the buffer spring by rotation of the shutter wheel. A fitting portion to be fitted is formed so as to be fitted so as to prevent the buffer spring from rotating due to the rotation of the shutter wheel at the end of winding of the shutter slat and at the beginning of unwinding at the end of the mounting body of the buffer spring. A shock-absorbing device for a shutter, characterized in that an abutting portion for abutting against an engaging portion of the mounting body is formed and provided.