JPH089357Y2 - Building shutter braking system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a braking device that operates when a lightweight balance shutter is closed.

[Problems to be Solved by Prior Art and Invention] Generally, a manual type lightweight balance shutter has a coil spring mounted on an upper winding shaft so that the shutter curtain can be opened and closed up and down. If too much force is applied during opening and closing, the shutter curtain has a problem in that the seat plate violently hits the lintel or the floor to generate noise or damage the components.

Therefore, so-called reverse spring type braking is known in which the reverse torque is made to act more as the shutter curtain rises when the shutter curtain rises, but in the case where the shutter curtain descends, the lower surface of the seat plate Some have a shock absorbing member such as a sponge attached. However, this does not prevent the shutter curtain from impacting the floor, but can only be expected to have the effect of softening the impact and noise when impacted. Moreover, in this case, since the shutter curtain is braked from below, each interlock connecting portion 1e of the curtain is, as shown in FIG.
Interlock connecting part on the entire surface of the shutter curtain that moves from the tension state where it is suspended by its own weight to the state where it is loose
From 1e, another noise was generated due to contact, bending, vibration, etc. of metal members, and it was impossible to prevent this kind of noise due to rattling and rattling.

[Means for Solving the Problems] The present invention was devised with the object of providing a braking device for a building shutter that can eliminate these drawbacks in view of the above-mentioned circumstances. A building shutter configured to open and close an opening by winding and rewinding a tar curtain on a wheel that is rotatably supported by a fixed shaft, and a brake drum integrally provided on the fixed shaft side. Suspended by the brake drum with one end supported by the wheel,
A brake shoe that can be transformed into a braking posture in which the wheel slides on the brake drum by the movement of the other end to apply braking to the wheel and a releasing posture in which the brake is released, and a brake shoe connected to the brake shoe to change the brake shoe. An operating rod pivotally supported by a wheel so as to be transformed into the braking posture and the releasing posture,
Acts to change the braking means from the release position to the braking position by ejecting from the inside of the wheel winding region beyond the innermost winding position of the shutter curtain by receiving the centrifugal force based on the wheel rotation. The weight body is interposed between the weight body connected to the rod and the operating rod and the wheel, and the weight body is regulated so that the weight body is prevented from jumping out until the centrifugal force due to the wheel rotation reaches a preset value. It is characterized in that a braking mechanism constituted by using an ammunition urged toward the inner side of the wheel winding area is provided.

The present invention is designed so that when the building shutter is closed, it is braked so that the user can land gently.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.
In the drawing, 1 is a shutter curtain of a building shutter constructed by interlocking a plurality of long slats 1a, and at the top end of the shutter curtain 1, there are a plurality of short hangings 1b. A seat plate 1c is connected to the lowermost end. 2 is a guide rail that stands on both sides of the building opening and guides the vertical movement of the shutter curtain 1. 3
Is a wheel for winding the shutter curtain 1, which is rotatably supported by a shaft 7 fixed to a bearing 6 provided on a side plate (bracket) 5 of a case 4 for housing the shutter curtain 1. The left and right wheels 3 and the intermediate wheel 3 are connected by a stay 8, which has a conventionally known configuration.

In FIG. 2, reference numeral 11 denotes a cylindrical brake drum which is attached to the shaft 7 facing the side of the wheel 3 and which is provided on the wheel 3 side that rotates around the outer periphery of the brake drum 11. 12 is hung so as to make a complete circle, and constitutes a brake mechanism. At both ends of the brake band 12, folded-back band connecting portions 12 are provided.
a and a connecting portion 12b are formed. Reference numeral 17 denotes an operating rod having a substantially V shape, one end of which is provided with a weight body 16, and the other end is the wheel 3 together with the band connecting portion 12a.
It is rotatably connected to a fulcrum pin 13 fixed to.
A connecting pin 15 that pivotally supports one end of a hook 14 that locks the band connecting portion 12b is provided on the bent portion of the operating rod 17. The hook 14 is locked so that the dimension between the band connecting portion 12b and the connecting pin 15 can be adjusted. Another ammo
One end of 18 is locked to a portion of the operating rod 17 close to the weight body 16, and the other end is locked to a pin 19 fixed to the wheel 3. On the other hand, the weight body 16 of the operating rod 17 with respect to the fulcrum pin 13 is configured to be in the rotation direction X of the wheel 3 when the shutter curtain 1 descends.

The weight 16 receives a centrifugal force when the wheel 3 reaches a predetermined rotational speed or more, and the weight 16 pops out. When the wheel 3 is stopped or at a low rotational speed, the urging force of the ammunition 18 overcomes the centrifugal force. It is set so as to draw the body 16 in the direction of the axis of rotation. And on the wheel 3 the slatted 1a
1b is included) to form a winding area of the shutter curtain 1, the weight body 16 is placed in the cylindrical winding area of the slat 1 regardless of the rotation speed of the wheel 3. It is confined. That is, even if the wheel 3 rotates at a speed higher than a predetermined speed and the weight body 16 tries to fly outward due to the centrifugal force superior to the ammunition 18, it is inscribed in the slat 1a.
In this case, the braked band 12 is not yet tightened (third part).
A) is set to hold.

Furthermore, the shutter curtain 1 continues to descend and the wheel 3
The slat 1a, which is the innermost winding part wound around the, is separated from the weight body 16 and unwound. At this time, if the rotation of the wheel 3 is faster than a predetermined speed, the weight 16 receives the centrifugal force exceeding the urging force of the ammunition 18 and flies outward, whereby the movable side band connecting portion 12b becomes a fulcrum pin. Attracted to the 13 side,
The braked band 12 will tighten the brake drum 11 (FIG. 3B). And shutter curtain 1
Will be braked from a sudden drop and will fall gently,
When the centrifugal force received by the weight body 16 is defeated by the urging force of the ammunition 18, the weight body 16 eventually stops in a state of being retracted toward the center of the drum 11 (FIG. 3C).

In the embodiment of the present invention constructed as described above, the shutter curtain seat plate 1c of FIG.
1 shows the fully opened state of the shutter curtain 1 stationary at the position. In this state, the weight 16 of the braking device 10 is pulled by the ammunition 18, the brake band 12 is loose, and the shutter wheel 3 is integrated with the brake. The drum 11 is in a non-braking state. Now, when the shutter curtain 1 is manually pulled down vigorously, the shutter curtain 1 starts to descend, and the wheel 3 and the brake drum 11 rotate at high speed in the X direction shown by the arrow. At this time, the weight 16 receives a large centrifugal force and tries to jump out, but the slat 1a or the suspension base 1b is still wound around the wheel 3 to form the winding area of the shutter curtain 1. Therefore, the movement of the wheel 3 beyond the outer periphery is restricted, and the brake drum 11 continues to be in a non-braking state (FIG. 4B).

Then, the shutter curtain 1 descends by inertia as it is, and the final winding (the innermost winding portion) with which the weight 16 is in contact.
The slat 1a (suspension base 1b) is fed away from the weight body 16, whereby the weight body 16 is released from the regulation by the shutter curtain 1, and due to the large centrifugal force received above. The brake band 12 tightens the brake drum 11 by jumping outward against the urging force of the ammunition 18. As a result, braking is applied to the descent of the shutter curtain 1 (FIG. 4C), and thereafter, the descent of the shutter curtain 1 is gently made to reach the floor surface and stop. In this stopped state, the weight 16 receives the urging force of the ammunition 18 and is pulled back so that it does not project, so that the brake band 12 is again in the non-braking state (FIG. 4D). In this way, even if the shutter curtain 1 is pulled down vigorously, when the seat plate 1c approaches the floor surface,
Since the brake band 12 automatically tightens the brake drum 11, the rotation of the wheel 3 is braked, which causes a slow descent due to the braking, and the centrifugal force loses the urging force of the ammunition 18 at a slow speed. It will not be slowed down until it hits the floor, and there will be no violent collision.

Also, when winding up the shutter curtain 1, the weight 16
Since it is moved to the non-braking posture by the urging force of the ammunition 18, it does not end in the braking state, and the rising speed is fast, and even if it tries to project outward, one turn of the shutter curtain 1 Therefore, the weight 16 is wound in a state where the protrusion of the weight 16 is restricted, and the braking device 10 does not affect the winding of the shutter curtain 1.

Further, the braking due to the protrusion of the weight 18 directly acts on the winding foil of the shutter curtain 1 and is not the braking from below the seat plate 1c or the like. In Fig. 7, the slat 1a is braked from above with the slat 1a being suspended by its own weight as shown in Fig. 7.
They do not loosen, bend, or come into contact with each other at 1e, and make no rattling or noise.

Moreover, since this braking device has a simple structure, the load capacity of the weight body 16, the strength and weakness of the ammunition 18, the brake band by the hook 14
Adjustments such as the length of 12 are made extremely easy.

The present invention is not limited to the above embodiment, and the brake drum 11 of the braking device 10 is not limited to the case side plate 5.
It may be fixed to. That is, as in the second embodiment shown in FIGS. 5, 6, and 8A and B, the shape of the operating rod 17 is changed, and a bent portion 17a is provided at the tip of the V-shape. The fulcrum pin 13 is pivotally supported, the band connecting portion 12a is connected to the bent tip 17b, and the other band connecting portion 12b is directly connected to the pin 15.Here, the support pin 13 and the bent tip 17b are connected. , L ₁ and L ₂ , respectively, when the distance from the connecting pin 15 is set to L ₁ <L ₂ . That is, the drum 11 of the band connecting portions 12a and 12b at both ends of the brake band 12
By making the distance from the center of the band different, the displacement of the weight 16 due to the centrifugal force causes the displacement in the arrow B direction on the band connecting part 12b side to be larger than the displacement in the arrow a direction on the band connecting part 12a side, and the band connecting The lever principle is utilized so that the pulling force on the part 12a side is added to the pulling force on the band connecting part 12b side.

In this case, the braking force differs depending on the rotating direction of the drum 11. In the figure, 20 is a liner made of rubber or the like for the brake band 12, and a part thereof is shown for the sake of explanation. That is, while the shutter curtain 1 is descending, the wheel 3 rotates in the X direction, and the weight 16 operates in the same manner as described above to effectively brake the brake drum 11 (Fig. 8A). On the other hand, when the shutter curtain 1 is raised, the wheel rotates in the opposite X direction, so that even if the weight 16 may move outward,
Since L ₁ <L ₂ is set, a force for pulling back the band brake 12 is generated, and it is difficult for the braking to work. When the shutter curtain 1 is opened, almost no braking force is applied, The opening operation force does not become heavy.

Furthermore, FIG. 9 shows a third embodiment. The brake band 12, the weight body 16 and the operating rod 17 are the same as those of the first embodiment, but a substantially V-shaped arm 34 is provided at a position facing the operating rod 17, and one end of the arm 34 is provided. A weight 33 is attached to the upper end, and a bullet 32 is attached to the other end. An arm 31 is integrally provided on the opposite side of the weight body 16 from the operating rod 17, and an ammunition 32 is locked to the other end of the arm 31. Furthermore, the arm 34 has a fulcrum 37
It is designed to swing around the
35 and 36 are stoppers. In this case, even if the weight 3 tries to project the weight 16 while the wheel 3 is stationary, the weight 33 always acts so as to move up the arm 31 via the arm 34 and the ammunition 32, and restricts this projection. . Further, since the weight 33 projects when the centrifugal force acts, a weak ammunition 32 can be used in this embodiment.

[Operation and Effect] In short, since the present invention is constructed as described above, when the shutter curtain is forcedly lowered, the shutter curtain descends and the innermost winding portion is pulled out. At the same time, the weight pops out and the brake sliding on the brake drum of the brake shoe is automatically applied. As a result, the descending speed is reduced and the floor is gently descended.

When the urging force of the ammunition overcomes the centrifugal force due to the gentle descent of the floor with this braking, the weight automatically returns to the non-braking state. At the stage of, it does not become a lock state, and when it is raised, it does not remain in a braking state and the raising operation does not become heavy.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of a building shutter braking device according to the present invention. FIG. 1 is a front view of the building shutter, and FIG. 2 is a side view of the braking device. Figure, Figure 3, A, B,
C is the same front view, FIGS. 4A, B, C and D are explanatory views showing a brake operating state, FIGS. 5 and 6 are a front view and a side view of the braking device according to the second embodiment, and FIG. A and B are detailed longitudinal sectional views of the interlocking connecting portion, FIGS. 8A and 8B are explanatory views of the action of the brake band, and FIG. 9 is a front view of the braking device according to the third embodiment. In the figure, 1 is a shutter curtain, 1a is a slat, 3 is a wheel, 10 is a braking device, 11 is a brake drum, 12 is a brake shoe, 16 is a weight, 17 is an operating rod, and 18 is an ammunition.

Claims (1)

[Scope of utility model registration request] 1. A building shutter configured to open and close an opening by rewinding and rewinding a shutter curtain on a wheel that is rotatably supported by a fixed shaft, wherein the shutter is integrated with the fixed shaft side. And a braking drum that is suspended by the brake drum with one end supported by the wheel and slides on the brake drum by the movement of the other end to brake the wheel and release it to release it A brake shoe that can be transformed into any posture, and an operating rod that is connected to the brake shoe and that is pivotally supported by a wheel so as to transform the brake shoe into the braking posture and the releasing posture. When the centrifugal force based on the wheel rotation is applied, the vehicle is ejected from the inside of the wheel winding area beyond the innermost winding position of the shutter curtain, and the braking means is released in the protruding attitude. The weight body connected to the operating rod to transform it into a braking posture, and is interposed between the operating rod and the wheel, until the centrifugal force due to the wheel rotation reaches a preset value. A braking device for a building shutter, comprising a braking mechanism configured by using an ammunition that urges a weight body toward the inside of a wheel winding region so as to prevent the fly-out.