JP2001140564A - Support structure for winding drum in electric opening/ closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the bending moment applied to an interlocking connection section between the output shaft of an opening/closing machine and a winding drum in the winding drum storing the machine forming an electric opening/ closing device. SOLUTION: The opening/closing machine 5 is integrally fixed to a fitting bracket 2a with a first spindle 8, a pair of second connecting bodies 9 are rotatably coupled with the spindle 8 at an axial gap, and the second connecting bodies 9 are integrally connected to the inner periphery on one end side of the winding drum 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of a structure for supporting a winding drum in an electric opening / closing device provided at an opening of a building such as a building or a house.

[0002]

2. Description of the Related Art In general, in this type of electric opening and closing device, a winding drum for winding a shutter curtain is rotatably supported (supported) between a pair of left and right mounting brackets supported on a frame side. In some cases, the shutter curtain is wound and unwound to open and close an opening based on forward and reverse rotation of the winding drum. In such things,
When the forward and reverse rotation of the winding drum is configured to be performed based on the driving of a switch provided with an electric motor, the switch is mounted on the winding drum as a method of minimizing a space for disposing the switch. Is adopted. As such a device, for example, there is a device as shown in FIG. 7. In this device, the base end of the switch 19 is fixedly supported in a cantilever manner on a mounting bracket 2a fixed to the frame side. A boss hole 20a of a connector (core) 20 integrally provided on the inner peripheral surface of the winding drum 3 is fitted around an output shaft 19a protruding from a tip of the switch 19 in a detent shape. Thereby, the winding drum 3 and the output shaft 19a are interlocked and connected, and one end of the winding drum 3 is pivotally supported on the frame side via the switch 19.

[0003]

By the way, the distributed load of the shutter curtain wound on the winding drum 3 is added to the winding drum 3 in addition to the load of the winding drum 3 itself, and the opening and closing operation is started. At the time of stop and at the time of stop, an impact load may be applied. And in the above-mentioned thing, the pivotal support of the one end side of the winding drum 3 is made via the switch 19, and moreover, the switch 19 is a cantilever shape in which the base end side is fixed to the frame, The load acts on the output shaft 19a which is a direct support portion of the winding drum 3. Also, this output shaft 1
In addition to the load, the bending moment of the winding drum acts on 9a. Therefore, in the case where the output shaft 19a is formed as a rigid joint, the load includes components inside the switchgear supporting the output shaft 19a, such as bearings and gears. Will act on the member,
There is a problem that the switchgear 19 may be damaged or worn out at an early stage. Therefore, to reduce this, the output shaft 19a
It is proposed that the joint be constructed like a universal joint and receive only a load in the radial direction without receiving a bending moment.However, in this case, there is another problem that the cost is high. Here, there is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made to solve these problems.
In an electric switchgear having an electric switchgear inside a winding drum rotatably supported on a frame for unwinding, one end of the winding drum is fixedly supported on the frame. For this purpose, at least two positions are pivotally supported on the outer periphery of a support shaft interposed between the switchgear and the frame. In this way, one end of the winding drum is axially supported by the support shaft on the skeleton side in the axial direction, and a bending moment acts on the switch output shaft, which is an interlocking connection between the switch and the winding drum. Can be done. In this one,
The two shaft support positions with respect to the support shaft of the winding drum of the present invention may be both ends of the support shaft. Further, in this case, the rotatable shaft support of the winding drum of the present invention with respect to the support shaft can be configured to be performed via a rotation shaft rotatably fitted to the support shaft.

[0005]

FIG. 1 shows an embodiment of the present invention.
3 will be described with reference to FIG. In the drawings, reference numeral 1 denotes a shutter curtain which constitutes an electric opening / closing device built at an opening of a building. The shutter curtain 1 is constituted by a plurality of slats 1a connected in a vertical direction, and has an upper edge. Is integrally connected to an outer peripheral surface (outside) of a winding drum (winding drum) 3 that is rotatably supported (supported) in a state described later on a shutter case 2 disposed above the frame. The shutter curtain 1 is unwound from the winding drum 3 based on the forward / reverse rotation of the winding drum 3, or is wound up by the winding drum 3, so that a pair of guides standing upright on both sides of the opening. The opening and closing of the opening is performed by moving up and down while the left and right side edges are guided by the rail 4, respectively, and each of them has a conventional configuration.

Reference numeral 5 denotes a switch provided inside the winding drum 3 formed in a long cylindrical shape. The switch 5 has a bottom surface 6a at a base end (one end) side of a necessary member such as an electric motor. The output shaft 5a is provided from the side of the front end (the other end and the left in this embodiment) toward the other end.
Are projected. And the output shaft 5a
The first connector 7 has a boss cylinder hole 7b integrally formed at the center of a disk-shaped main body 7a, and the boss cylinder hole 7b is connected to the output shaft. The first connecting member 7 is integrally connected to the output shaft 5a by being fitted around the output shaft 5a in a detent shape and a retaining shape. Further, a plurality of connecting pieces 7c bent along the inner peripheral surface of the winding drum 3 are integrally formed on the outer diameter portion of the first connecting body 7a.

On the other hand, at the center of the casing bottom surface 6a on the base end side of the switchgear 5, the first cylindrical support shaft 8 is directed toward the base end side (one side) so as to be coaxial with the output shaft 5a. A plurality of second connectors 9 are provided on the first support shaft 8 with a predetermined gap in the axial direction. In the present embodiment, a pair of second connectors 9 are provided. The two connecting members 9 are disposed at both left and right end portions of the first support shaft 8 so as to ensure the opposing interval as large as possible. The second connecting member 9 has a boss cylindrical hole 9b formed at the center of the disk-shaped main body 9a and is bent at the outer diameter of the main body 9a along the inner peripheral surface of the winding drum 3. A plurality of connecting pieces 9c are integrally formed, and the boss cylindrical hole portion 9b is externally fitted to the outer peripheral surface of the first support shaft 8 via a bearing 8a so as to prevent the first support shaft 8 from coming off.
The second connector 9 is rotatably connected to the second connector 9.

Then, as described above, the switch unit in which the first and second connectors 7 and 9 are connected to the first support shaft 8 to which the switch 5 is attached is attached in the longitudinal direction of the winding drum 3 (right and left). Direction) Internally assembled on one end side (in this embodiment, on the right side in FIG. 2), screw holes 7d formed in the connection pieces 7c, 9c of the first and second connection bodies 7, 9, By screwing screws 7e, 9e inserted from the outer peripheral side of the winding drum 3 into 9d, the first and second connecting bodies 7, 9 are set to be integrally fixed to the inner peripheral surface of the winding drum 3. ing. In this built-in state,
One end of the first support shaft 8 protrudes outward from one end side edge of the winding drum 3, and the projecting end of the first support shaft 8 is prevented from rotating to the right mounting bracket 2 a constituting the shutter case 2. By being fixedly supported in such a manner, one side of the winding drum 3 is rotatably supported (supported) by the right-side mounting bracket 2a.

On the other hand, the pivot at the other end of the winding drum 3 is constructed as follows. That is, on the other end side of the winding drum 3,
A pair of second connecting bodies 9 are internally mounted with a pair of second connecting bodies 9 rotatably fitted via bearings 10a at a predetermined axial distance on the outer periphery of the second supporting shaft 10, and the second connecting bodies 9 By inserting and screwing a screw 9e from the outer peripheral side of the winding drum 3 into a screw hole 9d formed in the connecting piece 9c, the second connector 9 is integrally fixed to the inner peripheral surface of the winding drum 3. Is set.
The protruding end of the second support shaft 10 protruding outward from the other end of the winding drum 3 is fixedly supported on the left-side mounting bracket 2b constituting the shutter case 2, so that the other end of the winding drum 3 is supported. The portion is set so as to be rotatably supported by the left mounting bracket 2b.

In the embodiment of the present invention configured as described above, the opening / closing device 5 is mounted on the winding drum 3 so that the shutter case 2 and the like above the opening can be made compact to save space. In this case, the switch output shaft 5a is interlocked and connected to the inside of one end side of the winding drum 3 via the first connecting member 7. Further, in this case, both ends of the winding drum 3 are rotatably mounted on the outer peripheral surfaces of the first and second support shafts 8 and 10 fixed on both sides of the frame via at least two second connectors 9. Supported. For this reason, most of the load of the winding drum 3 to which the load of the shutter curtain 1 is applied in addition to its own weight is the first and second support shafts 8 that support the both end portions of the winding drum 3 at two places. And 10, the load applied to the switch output shaft 5a located between them can be dispersed and reduced. In addition, both ends of the winding drum 3 are axially supported by the first and second support shafts 8 and 10 in the axial direction, and as a result, the switch output shaft which is located between these support portions and connected to the winding drum 3. The disadvantage that the bending moment acts intensively on 5a is avoided,
The durability of the switch output shaft 5a is enhanced, and the reliability of the product is improved.

As described above, in the embodiment in which the present invention is carried out, the support of the winding drum 3 by the first and second support shafts 8 and 10 corresponds to the first and second support shafts 8 and 10 respectively. Since it is configured to be performed by the two second connecting bodies 7 and 9 located at both ends and arranged to be separated from each other, the load on the first and second support shafts 8 and 10 can be dispersed. In particular, the one on the first support shaft 8 side close to the switchgear 5 includes the output shaft 5 of the winding drum 3.
This prevents the occurrence of a bending moment at the connection point with the switch a, thereby further protecting the switch output shaft 5a.

It should be noted that the present invention is not limited to the above-described embodiment, but may be configured as in the second embodiment shown in FIGS. In this shutter curtain, a flexible sheet material is used as the shutter curtain 11, and the shutter curtain 11 has engaging pieces 11a arranged on both sides at appropriate intervals on both sides of the frame. The shutter curtain 11 is configured to move up and down by engaging with the guide rail 12. At the lower end of the shutter curtain 11, suspension members 13 are connected at both sides. The free ends of the suspension members 13 are respectively suspended by second pulleys 14 a disposed above the guide rails 12 via first pulleys 14 disposed at the lower end portions of the pair of guide rails 12. The suspended hanging bodies 13 are wound around a pair of hanging body winding bodies 15 arranged so as to be linked to the winding drum 3. The hanging body take-up body 15 winds up the hanging body 13 as the winding drum 3 rotates in the direction of unwinding the shutter curtain 11, and turns in the direction in which the winding drum 3 winds the shutter curtain 11. Hanging body 1 due to movement
3, so that the shutter curtain 11 smoothly opens and closes the opening with forward and reverse rotation of the winding drum 3.

In this case, the interlocking connection between the hanging body winding body 15 and the winding drum 3 is configured as follows. That is, the first and second pivot shafts are fixedly supported or pivotally supported by the left and right mounting brackets 2a and 2b on the skeleton side on the outer periphery of the first and second support shafts 16 and 17 via the bearings 16a and 17a. 16b and 17b are fitted in a rotatable state. The first and second rotating shafts 16b, 17
b, a pair of second connecting bodies 9 are rotatably fitted to outer peripheral surfaces of the first and second rotating shafts 16b, 17b via bearings (bushings) 16c, 17c. The hanging body winding body 15 is integrally provided at a protruding end portion protruding therefrom. Here, of the pair of second connectors 9 on the second support shaft 17 side, the second connector 9 located on the other end side
Is rotatably fitted on the second rotating shaft 17b, but the second connecting body 9 located at one end side has the boss bearing 1 on the second supporting shaft 17.
The second support shaft 17 is set so as to rotate integrally with the winding drum 3 by being fitted outside in a detent shape via 7d. The mounting bracket 2b has a built-in rotation detecting means (not shown), and is set so as to perform a detecting operation based on the rotation of the second support shaft 17. Further, the second linking member 9 located outside of the support shafts 16 and 17 in the axial direction and the inner ends of the first and second rotation shafts 16b and 17b are connected by the coil bullet 18. Has been
Thereby, the forward and reverse rotation of the winding drum 3 is set so as to be interlockedly connected to the first and second rotation shafts 16b and 17b via the coil bullet 18. By the way,
As a result of the coil bullet 18 being interposed between the winding drum 3 and the first and second rotation shafts 16b and 17b, the rotation of the winding drum 3 and the first and second rotation shafts 16b and 17b In the case where a difference in the winding amount due to the rotation is generated, this can be corrected by rotating relative to each other, but the rotation of the winding drum 3 is directly changed to the first and second rotations. In the case of interlocking with the shafts 16b and 17b, the second connector 9 is connected to the first and second rotating shafts 16b and 17b.
What is necessary is just to set it as the structure which fits externally to the outer peripheral surface.

In this case as well, the winding drum 3 has a plurality of end portions on the first and second support shafts 16 and 17 via the outer periphery of the second connecting member 9 and the first and second rotation shafts 16b and 17b. As in the first embodiment, the bending moment generated at the connection between the switch output shaft 5a and the winding drum 3 can be reduced as much as possible. it can.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an electric switchgear.

FIG. 2 is a partially sectional front view showing a mounted state in which the winding drum is cut away.

FIG. 3 is a partial cross-sectional front view of a main part.

FIG. 4 is a schematic front view in a second embodiment.

FIG. 5 is a partial cross-sectional front view showing an attached state at one end side of a winding drum in a second embodiment.

FIG. 6 is a partial cross-sectional front view showing an attached state of the other end of the winding drum in the second embodiment.

FIG. 7 is a partial cross-sectional front view showing a mounted state in which a winding drum in a conventional example is cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shutter curtain 3 Roller cylinder 4 Guide rail 5 Switch 5a Output shaft 7 First connection body 7b Boss cylinder hole 8 First support shaft 9 Second connection body 10 Second support shaft

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Katsuhiro Sakamoto, Inventor 2-1-1, Nishishinjuku, Shinjuku-ku, Tokyo Sanwa Shutter Industrial Co., Ltd. F-term (reference) 2E042 AA01 AA06 BA01 CA01 CB01 CB02 DA01

Claims (3)

[Claims] 1. An electric switchgear having an electric switchgear inside a winding drum rotatably supported by a frame for winding and unwinding a shutter curtain, wherein one end of the winding drum is provided. Part of the bobbin in an electric switchgear that is rotatably supported at at least two places on the outer periphery of a spindle interposed between the switchgear and the frame so as to support and fix the switchgear to the frame. Support structure. 2. The support structure for a winding drum in an electric opening / closing device according to claim 1, wherein the two pivoting positions of the winding drum with respect to the support shaft are both ends of the support shaft. 3. An electric opening and closing device according to claim 1, wherein the rotatable support for the support shaft of the winding drum is performed via a rotation shaft rotatably fitted to the support shaft. The support structure of the winding drum in the device.