JPH056095U - Shutter opening and closing device for buildings - Google Patents

Abstract

(57) [Summary] [Purpose] The minimum type of torsion spring is used for all types of shutters, and moreover, the fall of the shutter due to its own weight during automatic winding is prevented, making it easy to open the shutter manually. Security and safety. [Structure] A shutter winding drum that is driven and rotated by coupling a rotation drive unit capable of forward and reverse rotation with a clutch, and an automatic shutter built in the winding drum that rotates the winding drum in a shutter opening direction when the clutch is released. In a device for opening and closing a shutter for a building, which comprises a hoisting spring, the clutch is in an inoperative state when the clutch is engaged, and it is actuated at the same time when the clutch is released to allow the hoisting drum to rotate in a shutter opening direction. A shutter fall prevention mechanism is attached to prevent rotation in the closing direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an opening / closing device that opens and closes a shutter formed by connecting a large number of slats in parallel by a drive device. In particular, in the event of an emergency such as a fire, the shutter is automatically and reliably wound without operating the drive device. The present invention relates to an opening / closing device for a building shutter that incorporates an upper mechanism.

[0002]

[Prior Art]

 The inventor of the present invention first developed an opening / closing device for a building shutter that has an automatic hoisting mechanism that automatically hoists the shutter without operating the drive device in an emergency (Japanese Utility Model Publication No. 3-63693).

This building shutter opening / closing device is not limited to a normal opening / closing mechanism that opens / closes the shutter by hoisting / rewinding the shutter onto / from a hoisting drum that is driven and rotated by a drive device through a clutch. In addition, an automatic hoisting spring mechanism is built in the hoisting drum with a torsion spring that accumulates spring force using the rotation of the drum during shutter closing operation and releases the accumulated spring force when opening. When the clutch is disengaged in an emergency such as a fire, the accumulated release force of the spring acts on the hoisting drum that is in a freely rotating state to automatically rotate the hoisting drum in the hoisting direction and release the shutter. Is to be automatically wound up.

[0004]

[Problems to be solved by the device]

 Therefore, the opening / closing device disclosed in the above publication usually separates the clutch in the meshed state and at the same time rotates the hoisting drum by the force of the torsion spring to automatically wind up the shutter. Although useful, the shutter device itself has various sizes and weights from small to large as it is applied to small windows for home use and openings such as entrances and exits of warehouses and factories. It is necessary to prepare various kinds of torsion springs, and it is impossible to wind up with a shutter larger than a certain amount only by the force of the torsion spring. The shutter will stop opening, and in some cases the shutter will drop halfway. Thailand could take place.

In such a situation, it is necessary to continuously perform the operation of manually raising the shutter while simultaneously performing the clutch disengagement operation. If the operation is stopped in the middle of the operation, the shutter is dropped. It is necessary to support the shutter by hand to prevent this.

The present invention has been made for the purpose of eliminating the above-mentioned problems, and uses a minimum number of torsion springs for all types of shutters, and prevents the shutters from falling due to its own weight. A mechanism is adopted to avoid the complexity of the above-mentioned manual operation of opening the shutter.

[0007]

[Means for Solving the Problems]

 In order to achieve this object, the structure of the present invention comprises a rotary drive unit capable of forward and reverse rotation, a shutter winding drum connected to one end of a shutter and driven and rotated by a clutch connection with the drive unit, and the winding unit. An opening and closing device for a building shutter, which is built in an upper drum and has an automatic hoisting spring that rotates the hoisting drum in a shutter opening direction when the clutch is released, wherein the shutter is inactive when the clutch is engaged, and It is characterized in that a shutter drop preventing mechanism is additionally provided, which operates simultaneously with the release of the clutch to allow the winding drum to rotate in the shutter opening direction and prevent the winding drum from rotating in the closing direction.

[0008]

[Action]

 The clutch is in a state in which it is always engaged by an urging means such as a spring, and normally, by operating an external switch according to a conventional method, the drive device is normally or reversely rotated, and the winding drum is normally or reversely rotated to release the shutter. Wind up and rewind. At this time, the automatic hoisting spring accumulates spring force at the time when the shutter is unwound from the hoisting drum, that is, simultaneously with the closing operation of the shutter, and the shutter is wound on the hoisting drum, that is, the shutter is completely closed. In the opened state, most of the spring force accumulated in each spring during the opening operation of the shutter is released. At this time, the shutter fall prevention mechanism does not operate and the rotation of the hoisting drum is not restricted.

In an emergency such as a fire, if the clutch is released without operating the drive device, the spring force accumulated in the automatic hoisting spring acts on the hoisting drum to wind the hoisting drum. Rotate the drum in the shutter winding direction to automatically wind the shutter. At the same time, the shutter fall prevention mechanism operates to keep the shutter automatic winding and prevent the shutter from falling due to its own weight. That is, according to the shutter opening / closing device of the present invention, when the clutch is released in an emergency, the shutter is automatically wound, and the spring force for automatically winding the shutter is weak and the shutter only has the same spring force. However, even if it is not possible to wind it up, or if further winding up becomes impossible during the winding up, the shutter force can be easily wound up manually by the spring force. Moreover, as soon as the clutch is released, the shutter fall prevention mechanism automatically functions to prevent the shutter from falling under its own weight even if you release your hand during winding.

[0010]

【Example】

 Hereinafter, the present invention will be described in detail with reference to illustrated embodiments. FIG. 1 shows a winding structure of a window shutter which is a typical embodiment of the present invention. Reference numeral 1 denotes a head box attached to an upper outer wall of a window opening of a body. A hoisting device 3 for the shutter 2 is provided inside. The shutter 2 has a large number of slats connected in parallel and sequentially connected, and its structure is not particularly different from the conventional one. Support brackets 4 and 5 for supporting the hoisting device 3 of the shutter 2 on the left and right are provided on the left and right inner wall surfaces of the head box 1, and a guide member 6 of the shutter 2 is provided just below the window side of the hoisting device 3. It is projected from the body.

The hoisting device 3 for the shutter 2 includes a drive unit 7 including an electric motor, a hoisting / rewinding unit 8 for hoisting / rewinding the shutter 2 by driving the drive unit 7, and the hoisting device. An emergency shutter automatic winding section 9 provided in the rewinding section 8 and a shutter fall prevention section 10 for preventing the shutter 2 from falling while the shutter automatic winding section 9 is operating.

The electric motor 11 of the drive unit 7 is supported by one of the support brackets 4 and 5 provided on the head box 1, and its output shaft is the clutch operation shaft 12 and the clutch. 2, the tip end of the clutch operating shaft 12 is rotatable via a socket member 14 that is keyed to the other supporting bracket 5 and is axially movable as shown in FIG. In addition, it is slidably supported in the axial direction, and its tip projects into the internal space of the support bracket 5. The upper part of the clutch release operation lever 15 is attached to the tip of the clutch operation shaft 12 so as to be orthogonal to each other. When the lower part of the operation lever 15 is pushed toward the inside of the box, a part of the support bracket 5 is centered. The clutch operating shaft 12 which rotates and engages with the upper part is pulled out to the outside to disengage the clutch 13. In this embodiment, as the clutch 13, a meshing clutch structure composed of clutch members 13-1, 13-2 having a pair of male and female meshing portions is adopted, but of course, a friction clutch or an electromagnetic clutch structure should be adopted. You can also A retainer 15 is fixed in the middle of the clutch operating shaft 12, and a compression spring 16 is mounted between the retainer 15 and the socket member 14 to constantly urge the clutch operating shaft 12 in the direction in which the clutch 13 is connected. ing. Reference numeral 17 is a holding tube for automatic hoisting springs 22 and 23, which will be described later, through which the clutch operating shaft 12 is inserted, and the socket member 14 is fitted and fixed to the end thereof. ..

The hoisting / rewinding portion 8 has a collar body 18 fitted in the case of the electric motor 11 and a collar body rotatably fitted in the end portion of the holding tube 17 on the socket member side. It is composed of a tubular body 19 and a hoisting drum 20 having both ends fitted to both the tubular bodies 18 and 19 with a collar, and the tubular body with a collar fitted to the outer case of the hoisting drum 20 and the electric motor 11. 18 is sufficient if the hoisting drum 20 is fitted so that the rotation of the hoisting drum 20 is allowed as a result, and the hoisting drum 20 rotates together with the flanged tubular body 19 on one side. Therefore, it is necessary to be connected by appropriate means. In this embodiment, the flanged cylinder 18 fitted in the outer case of the electric motor 11 is fixed to the case, and the hoisting drum 20 is configured to freely rotate on the flanged cylinder 18. ing. Further, projections (not shown) are projected on the outer peripheral surface of one of the flanged cylinders 19 at predetermined intervals, and the hoisting drum 20 is provided with recesses (not shown) that engage with the projections. The flanged cylindrical body 19 and the hoisting drum 20 are caused to rotate in cooperation with each other by the engagement of the projection and the recessed portion. Of course, the present invention is not limited to the above configuration.

The driving of the hoisting / rewinding unit 8 by the driving unit 7 is performed by directly connecting the clutch member 13-2 connected to the clutch operating shaft 12 and the hoisting drum 20. Although not shown, this connecting structure forms a plurality of protrusions on the outer peripheral surface of the clutch member 13-2 at a predetermined interval, and the portion of the hoisting drum corresponding to these protrusions is long in the axial direction. A recess is formed, and the projection is engaged in the recess to connect the two. According to this structure, the protrusion moves axially in the recessed portion, and the clutch 13 can be disengaged by operating the clutch operating shaft 12, so that the rotation of the electric motor 11 and the rotation of the hoisting drum 20 can be prevented. It can be separated.

The automatic shutter winding part 9 for an emergency is fitted and coupled to the socket member 14, and is fitted to a holding tube 17 that does not rotate itself and an end portion of the holding tube 17 on the socket member 14 side. And is fitted to the other end of the holding tube 17 and the tubular body 19 with a collar that rotates together with the hoisting drum 20, and is itself integrated with the hoisting drum 20 by engaging means such as protrusions and recesses. And a pair of left and right automatic hoisting springs in which respective end portions are fixed between the tubular body with flanges 19 and 21 and the holding tube 17 and the tubular body with an intermediate flange that is rotated together with the hoisting drum 20. 22 and 23. It should be noted that the holding tube 17 and the tubular bodies 19 and 21 with both flanges are prevented from moving relative to each other in the axial direction by a retaining ring 24 or the like, and follow the operation of the clutch operating shaft 12 in the axial direction together with the hoisting drum 20. Moving.

Further, as shown in FIGS. 2 to 4, a plurality of ratchet teeth 25, 25 are formed on the side surface of the flanged tubular body 19 arranged on the socket member 14 side, which faces the support bracket 5. ing. According to the present embodiment, the ratchet tooth 25 has a flat surface portion 27 protruding from the bottom surface portion 26 and having a flat surface, and an inclined surface portion 28 connecting one upper end of the flat surface portion 27 and the bottom surface portion 26. have. In FIG. 2, the counterclockwise direction indicated by the arrow indicates the rotation on the winding side, and the clockwise direction indicates the rewinding (downward direction of the shutter).

A shutter drop prevention unit 10 for preventing the shutter 2 from falling while the automatic shutter winding unit 9 is operating is shown in an enlarged scale in FIGS. 2 to 4. The shutter drop prevention portion 10 is a main portion of the present invention, and includes the clutch release operation lever 15 attached to the tip of the clutch operation shaft 12 and the flanged cylinder arranged on the socket member 14 side. The ratchet teeth 25 are formed on the side end surface of the body 19, and the ratchet engagement / disengagement member 30 engages / disengages with the ratchet teeth 25 in association with the operation of the clutch release operation lever 15.

The ratchet engagement / disengagement member 30 is made of a metal plate material, and as is clear from FIGS. 2 to 4, a horizontal portion 31, a vertical portion 32 bent downward at a right angle from one end of the horizontal portion 31, and the vertical portion 32. It has a latch claw portion 33 formed at the lower end of the portion 32, which directly intersects with a plane including the horizontal portion 31 and the vertical portion 32 and projects in one direction. The ratchet engagement / disengagement member 30 has its latch claw portion 33 opposed to the ratchet teeth 25 formed on the side end surface of the flanged tubular body 19, and the pin 34 is attached to the support bracket 5 at the center of the horizontal portion 31. The latch claw portion 33 is constantly urged by a spring member (not shown) in a direction to engage with the ratchet teeth 25.

The clutch release operating lever 15 is attached to the tip of the clutch operating shaft 12, and as described above, the clutch operating shaft 12 is pulled out to the inside of the support bracket 5 against the elastic force of the compression spring 16, and 13 is separated. In the present invention, the clutch release operating lever 15 is extended further upward from the engaging portion with the clutch operating shaft 12 so that the clutch 13 is engaged, that is, the clutch operating shaft 12 shown by a solid line in FIGS. 2 and 4. When retracted, the upper tip 35 of the clutch release operation lever 15 presses the free end of the horizontal portion 31 of the ratchet engagement / disengagement member 30 from the side surface to rotate the ratchet engagement / disengagement member 30 against the bias of the spring member. The latch claw portion 33 and the ratchet tooth 25 are disengaged from each other. Therefore, in this state, the opening and closing of the shutter 2 by the normal electric motor 11 can be performed without any trouble.

In the above structure, normally, the clutch operating shaft 12 is in the position where the clutch 13 shown by the solid line in FIG. 2 is put in due to the operation of the compression spring 16 (see FIG. 1), and the switch (not shown) is operated. By doing so, the electric motor 11 rotates in the normal or reverse direction, and the winding drum 20 rotating integrally with the clutch portion 13-2 also rotates in the normal or reverse direction, and the shutter 2 is wound up and rewound to open and close. At this time, the holding tubes 17 of the automatic hoisting springs 22 and 23 are held by the support bracket 5 and do not rotate, and the clutch release operation lever 15 is also at the position shown by the solid line in FIG. 2 and the free end of the ratchet engagement / disengagement member 30. Is pressed to separate the ratchet claw portion 33 from the end face ratchet teeth 25 of the flanged cylinder body 19 arranged on the socket member 14 side. Therefore, the flanged cylinder body 19 and the central flanged cylinder body 21 are separated from each other. Both rotate integrally with the hoisting drum 20.

The automatic hoisting springs 22 and 23 are hoisted around the holding tube 17 at the same time when the shutter 2 is unwound from the hoisting drum 20, that is, when the shutter 2 is closed, and a spring force is accumulated. When the shutter 2 is wound up on the hoisting drum 20, that is, when the shutter 2 is completely opened, most of the spring force accumulated in the springs 22 and 23 is released during the opening operation. ..

When an emergency situation such as a fire occurs, the electric motor 11 is not operated and the lower end of the clutch release operating lever 15 is moved toward the hoisting drum 20 as shown by the phantom lines in FIGS. 2 and 4. When pressed, the clutch release operation lever 15 rotates around the lower part of the support bracket 5 as a fulcrum to move the clutch operation shaft 12 to disengage the clutch 13, and at the same time, the upper end 35 of the clutch release operation lever 30 presses the ratchet engagement / disengagement member 30. solve. As a result, the ratchet engagement / disengagement member 30 is rotated by a spring force (not shown), and the latch claw portion 33 is elastically engaged with the ratchet tooth 25. In this state, the ratchet teeth 25 rotate in the counterclockwise direction (shutter winding direction) shown by the arrow in FIG. 3, but in the clockwise direction (shutter rewinding direction), the side portions of the flat surface portion 27 of the ratchet teeth 25 are perpendicular to each other. The rotation is stopped when the latch claw 33 is engaged with the surface.

That is, according to the shutter opening / closing device, when the clutch release operation lever 15 is operated in an emergency, the clutch 13 is released and at the same time, the spring force accumulated in the automatic hoisting springs 22 and 23 is wound. The shutter 2 is automatically wound up by acting on the upper drum 20 to rotate the winding drum 20 in the shutter winding direction, and if the spring force is weak, the shutter 2 cannot be wound up only by the spring force or it is wound up. Even if it is impossible to wind the shutter further in the middle of the time, the shutter 2 can be easily winded by the spring force, and at the same time, the shutter fall prevention unit 10 automatically functions. Prevents the shutter 2 from falling due to its own weight even if you release your hand during winding.

The above is a specific description of a typical embodiment of the present invention, but the present invention is not limited to the above embodiment, and the point is that a drive device for this type of shutter opening / closing device is used. Various changes can be made as long as the automatic clutch winding mechanism is activated and the shutter fall prevention mechanism is activated at the same time when the clutch engagement with is released.

[0025]

[Effect of the device]

 As is apparent from the above description, according to the present invention, at the time of emergency, the clutch connection with the drive device of the shutter hoist drum is released, and at the same time, the automatic shutter hoisting mechanism operates and the shutter fall prevention mechanism is provided. Since the shutter is configured to operate, even if the automatic hoisting force is small, the shutter does not drop during the automatic hoisting, and the shutter can be easily and reliably opened manually.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing a typical embodiment of a shutter opening / closing device for buildings of the present invention.

FIG. 2 is a partially enlarged plan sectional view of the device.

FIG. 3 is a side view of the same portion.

FIG. 4 is a bottom view of the same portion.

[Explanation of symbols]

 1 Headbox 2 Shutter 3 Hoisting device 4, 5 Support bracket 6 Guide member 7 Drive part 8 Hoisting / rewinding part 9 Automatic shutter hoisting 10 Shutter fall prevention part 11 Electric motor 12 Clutch operating shaft 13 Clutch 13-1, 13-2 Clutch member 14 Socket member 15 Clutch release operation lever 16 Compression spring 17 Holding tube 18,19 Cylindrical body 20 Winding drum 21 Intermediate tubular body 22,23 Winding spring 24 Stop ring 25 Ratchet teeth 26 Bottom 27 Plane Part 28 Slope part 30 Engaging member 31 Horizontal part 32 Vertical part 33 Latch claw part 34 Pin 35 (Clutch release operation lever) upper end

Claims (1)

Claims for utility model registration: 1. A rotation drive unit capable of forward and reverse rotation, a shutter winding drum that is connected to one end of the shutter, and is driven and rotated by a clutch connection with the drive unit, and the winding. An opening and closing device for a building shutter, which is built in a drum and comprises an automatic hoisting spring that rotates a hoisting drum in a shutter opening direction when the clutch is released, wherein the clutch is in an inoperative state when the clutch is engaged, and The shutter opening and closing device for a building, which is operated simultaneously with the release of the shutter to allow the winding drum to rotate in the shutter opening direction and to prevent the winding drum from rotating in the closing direction.