JP2535306Y2 - Wrapping transmission for switchgear such as shutter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping transmission for a switch such as a shutter mounted on a ceiling.

[0002]

2. Description of the Related Art Conventionally, in a shutter that is opened and closed by an electric motor, a sprocket that rotates integrally with the drive shaft of the shutter is fitted to a drive shaft of the shutter so that the shutter can be opened and closed by human power when no power is supplied such as a power failure. A chain wheel is installed around the sprocket in a non-contact state, and the chain is wound around the chain wheel. Then, at the time of a power failure, a non-contact state is released by operating a lever adjacent to the chain wheel, and the chain is manually operated so that the sprocket meshes with the internal gear of the chain wheel to open the shutter by manual power.

In order to return to the current state, the lever must be operated in the same manner, the engagement between the sprocket and the chain wheel must be released, and the operation must be converted to electric operation again. It is troublesome and dangerous to operate a switch such as a shutter every time a power failure occurs. Further, the peripheral mechanism of the chain wheel is complicated, and problems are liable to occur, resulting in an increase in cost.

In order to solve these problems, the inventor of the present invention applied for a wrapping transmission device for a switch such as a shutter in Japanese Patent Application No. 3-43562, and the shutter was mechanically simple and easy. A switchgear that can open and close such as was provided.

An embodiment of a wrapping transmission for a switch such as a shutter disclosed in Japanese Utility Model Application No. 3-43562 will be described with reference to FIGS. 6 (a) and 6 (b). The wrapping transmission device 65 is used, for example, attached to the upper ceiling of an opening opening that partitions a room. When the shutter is opened and closed by normal electric operation, the drive shaft 60 is rotated by operating the open / close switch, and the disk 5 attached to the drive shaft 60 without operating the chain S as shown in FIG.
1 is the drive shaft 6 without contacting the chain wheel 52.
It is designed to rotate integrally with 0.

In the event of a power failure, the rotation of the drive shaft 60 stops, so that the shutter cannot be opened and closed electrically, and the electromagnetic solenoid is de-energized, and the brake lining (not shown) closes and the drive shaft 60 is closed. The brake is applied to the rotation.

In this state, the chain S on the right side in the drawing hanging via the roller 53 is manually pulled downward. Then, in FIG. 6B, the roller 53 is first pushed by the chain S and moves rightward, and accordingly, the mountain-shaped bulging portion 55 of the lever 54 to which the roller 53 is attached is attached.
To rotate the lever 54 downward. Then, since the brake lining opening / closing wire 56 is also pulled down in accordance with the rotation, the drive regulation of the drive shaft 60 is released even if the electromagnetic solenoid is in a non-excited state in a power failure state to open the brake lining. .

At the same time, the inclined plate 58 to which the chain wheel 52 is attached is tilted rightward about the support member 57, and as a result, the chain wheel 52 is relatively eccentric with respect to the circular plate 51, and Peripheral surface 52
a is pressed by the disk 51, and the rotation torque is transmitted between the two 51 and 52. When the chain S is kept rotating, torque is transmitted from the disk 2 to the drive shaft 60 to open the shutter.

[0009]

According to this method, the shutter can be easily opened in the event of a power failure simply by pulling down the chain S in the wrapping transmission of a switch such as a shutter.

However, the timing of pulling down the opening / closing wire 56 and the inner peripheral surface 52a of the chain wheel 52 are not necessarily required.
Did not coincide with the timing at which the disk was pressed by the disk 51, and a slight deviation sometimes occurred between the operation start timings of the two.

As a result, when the opening / closing wire 56 is first pulled down and the brake lining is opened, the shutter comes down by its own weight, and thereafter, the inner peripheral surface 52a of the chain wheel 52 and the disk 51 come into contact with each other. Therefore, sudden braking is applied and a large impact is applied to the member, which may cause a problem. In addition, since the friction is large, the contact surface between the inner peripheral surface 52a and the disk 51 is quickly reduced.

Conversely, if the inner peripheral surface 52a of the chain wheel 52 first comes into contact with the disk 51, the drive shaft 60 is rotated with the brake applied, and manual operation is required. Would be too heavy and would apply an excessive load to the member.

Therefore, the timing of pulling down the opening / closing wire 56 and the inner peripheral surface 52a of the chain wheel 52 are
There has been a demand for a technique for ensuring that the timing of pressing the button 1 coincides with the timing of pressing.

According to the present invention, there is provided a wrapping transmission device capable of quickly opening and closing a shutter or the like without a deviation between the timing of releasing the brake lining when the wrapping member is manually operated and the timing of transmitting the rotational power to the drive shaft of the wrapping member. Is provided.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present inventor has proposed a rotating power which is fitted to a drive shaft of a switch such as a shutter and is rotated by the rotation of the drive shaft. A transmission member and a wheel that surrounds the turning power transmission member from the outer peripheral direction, and that is wound around the outer periphery of itself and turns the transmission member so as to rotate with the transmission driving force of the winding transmission member,
The wheel is rotatably attached, and the inclined plate is fixed by the support member and can swing right and left around the support member as a center of rotation. When the drive transmission force of the winding transmission member is applied, the inclined transmission plate is swung so that the inclined power transmission member and the wheel are engaged under pressure. A winding transmission member that swings in a direction to be brought into a mating state, a brake control member that controls the allowance and prevention of the rotational movement of the drive shaft in conjunction with the swinging movement of the winding transmission member derivative; An engagement adjusting means for adjusting so as to release the braking force on the drive shaft of the brake control member after the power transmission member and the wheel are engaged is provided.

[0016]

According to the above arrangement, when the winding transmission member is pulled when the external driving force is lost when the power is not supplied and the switch such as a shutter cannot be opened or closed, the winding transmission member is adjusted by the engagement adjusting means and pulled. The derivative is actuated to first engage the wheel and the turning power transmission member. Further, when the winding transmission member is continuously pulled, the brake control member is actuated again, the braking force on the drive shaft is released, and the rotational power of the winding transmission member is transmitted to the drive shaft.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 3, a chain device main body 10 of a shutter opening / closing device includes an alloy front fixing plate 11 having a substantially cross-sectional shape in plan view and a back plate 12 also having alloy in substantially side cross section. The fixing plate 11 covers the back plate 12 so as to cover it, and through holes are drilled from the four corners on the front, upper, lower, left and right sides of the front fixing plate 11 to the ribs 13 of the back plate 12 and screwed with small screws 14.

An electromagnetic solenoid (not shown) is mounted inside the chain device main body 10, and the brake lining of a brake mechanism (not shown) of a shutter opener (not shown) disposed on the back of the back plate 12 is always opened in an excited state. The brake is not applied when opening and closing the shutter. When an emergency stop switch is input or a power failure occurs, the motor is de-energized, the brake lining is closed, and the brake is applied.

A hole 12a is formed in the back of the chain device main body 10, that is, substantially in the center of the center surface of the back plate 12, and the end of the drive shaft 1 for opening and closing the shutter is inserted. A hole 18 is also formed at the front of the chain device main body 10, that is, substantially at the center of the center surface of the front fixing plate 11, and the cylindrical portion 19 is formed inside the chain device main body 10 along the hole 18.
Are formed substantially at right angles to the front surface of the chain device main body 10. In the chain device main body 10, the drive shaft 1 and the input shaft 1a are connected via a shaft joint 16 fastened by bolts 17 so as to be integrally rotatable. Roller bearing 20 attached to the portion 19, the tip of which is received by the chain device body 1
0 protrudes from the hole 18.

On the front surface of the chain device main body 10, an inclined plate 5 made of an alloy and formed in a front keyhole shape is arranged.
The inclined plate 5 has a long hole 15 extending in the lateral direction extending upward, and the stepped bolt 4 fastened to the front fixing plate 11 is inserted into the long hole 15. Accordingly, the inclined plate 5 is swingably hung on the front fixing plate 11, and is slidable left and right by the length of the long hole 15 with respect to the stepped bolt 4.

An upright portion 5a is formed at the upper end of the inclined plate 5, and one end of a coil spring 48 is attached to the upright portion 5a. The other end of the coil spring 48 is attached in a biased state to a coil spring fixing bolt 61 fixed to the upper right side of the front fixing plate 11. As a result, the inclined plate 5 is normally biased rightward by the coil spring 48, and the stepped bolt 4 is relatively positioned at the left end of the long hole 15.

A hole 21 larger than the front hole 18 of the front fixing plate 11 is formed on the inclined plate 5 at a position corresponding to the concentric axis of the front hole 18, and as shown in FIG.
A cylindrical portion 22 is formed extending substantially forward to the front of the chain device main body 10 at right angles to the front surface of the chain device main body 10.
2a is bent inward at a substantially right angle.

A slightly curved elongated hole 44 is formed below the cylindrical portion 22. A screw 45 screwed into the front of the chain device body 10 is inserted through the elongated hole 44 so that the inclined plate 5 is not tilted more than necessary. Has become.

Further, below the long hole 44, a fixing plate 43 is provided.
Are fixed, and one ends of coil springs 41 and 42 to be described later are attached thereto. A rolling bearing 24 is disposed between the inclined plate 5 and the front surface of the chain device main body 10 via a spacer 23, and is fitted into the cylindrical portion 22.
A trumpet-shaped frame 26 is inserted into the cylindrical portion 22 at a small diameter portion 26a from the front of the cylindrical portion 22 of the inclined plate 5, and a ring 27 fitted around the small diameter portion 26a and the small diameter portion periphery. , Cylindrical part 22, cylindrical part tip edge 22a, spacer 23,
The rolling bearing 24 is fixed in between.

The chain wheel 3 is fastened to the periphery of the large diameter portion of the frame 26 by bolts 28. The chain wheel 3 is formed by fixing a pair of symmetrical alloy disks with bolts 28, and the groove 2 is formed on the outer periphery of the chain wheel 3 in an assembled state.
9, a short ring chain S is wound therearound, the ring portion is engaged with a convex portion 30 formed at a predetermined interval in the groove portion 29, and the chain S is driven manually. It has become.

A disk 2 as a power transmission member is fixed to the input shaft 1a corresponding to the inside of the chain wheel 3. A space 31 is formed between the outer periphery of the disk 2 and the chain wheel 3 so that the two can be kept out of contact with each other, and the axis of the disk 2 matches the axis of the hole 21 of the inclined plate 5. As far as possible, that is, in a state where the inclined plate 5 is not inclined, or in a state where it is only slightly inclined, the non-contact state is established. As described above, the inclined plate 5 is normally urged rightward by the coil spring 48,
The stepped bolt 4 is relatively positioned at the left end of the long hole 15. Therefore, as shown in FIG. 1, the state in which the stepped bolt 4 is located at the left end of the elongated hole 15 corresponds to the case where the axis of the disk 2 matches the axis of the hole 21 of the inclined plate 5.

The disk 2 has a tapered surface 34 formed on the outer peripheral edge thereof. When the chain wheel 3 and the disk 2 are relatively eccentric, the tapered surface 34 becomes an inner peripheral surface 35 of the chain wheel 3. When the chain S is further pulled, the axial torque of the chain wheel 3 is transmitted between the two surfaces 34 and 35 under pressure.

The disk 2 is fixed with a spline at the tip of the input shaft 1a, but it is of course possible to use a key or the like. A synthetic resin roller 6 containing bolts is mounted on the chain wheel 3 on the lower left side of the front surface of the inclined plate 5.
The chain S, which is attached by tightening the nut 33 via the spacer 32 for positioning, is hung on the chain wheel 3 in FIG. I have.

On the lower left side of the front surface of the chain device main body 10, a guide ring 8 that guides the chain S hung on the chain wheel 3 in FIG.
Are fixed via a nut 8a.

A lever 7 is disposed below the chain device body 10 and along the lower edge in conjunction with the roller 6 as an interlocking member. The base of the lever 7 is formed in a substantially L-shape, and is attached to the lower right side of the front surface of the chain device main body 10 by a bolt 39 via a fixing member 36.

A latch 38 is formed at the tip end of the lever 7, and a lower mounting ring of a brake lining opening / closing wire 40 for operating a brake lining opening / closing mechanism (not shown) is hooked. At the top of the lever 7, a mountain-shaped bulging portion 37 is formed near the center of the chain device main body 10, and moves integrally with the inclined plate 5 when the inclined plate 5 is inclined rightward in FIG. The spacer 32 is pushed by the moving spacer 32.

A coil spring 41 is engaged with the bulging portion 37 of the lever 7 to constantly urge the lever 7 upward. One end of a coil spring 42 is attached to a fixing plate 47 fixed to a side surface of the chain device main body 10 by bolts 46a and nuts 46b. The combined biasing force of the coil springs 41 and 42 has a stronger biasing force as compared with the coil spring 48 interposed between the upright portion 5a and the coil spring fixing bolt 61. .

In this chain device, the chain S is attached so that the member hangs down on the left side in FIG. 1. However, the chain S can hang down on the right side depending on the mounting condition of the device to the shutter. Mounting holes 49 and 50 for the roller 6 and the guide ring 8 are formed at symmetrical positions on the front surface of the front fixing plate 11 and the inclined plate 5, and the fixing plates 47 are also fixed to both side surfaces of the chain device main body 10.

Next, the operation of the chain device will be described with reference to FIGS. The drive shaft 1 is mounted near the upper ceiling of an opening that partitions the room, and operates an open / close switch adjacent to the shutter to drive an electric motor (not shown) to rotate the drive shaft 1 when opening and closing the shutter. In this state, the disk 2 attached to the input shaft 1a rotates integrally with the drive shaft 1 without contacting the chain wheel 3 (FIG. 4A).

In the event of a power failure, the rotation of the drive shaft 1 and the input shaft 1a connected thereto is stopped, so that the shutter cannot be opened and closed electrically, and the electromagnetic solenoid is de-energized and the brake is released. The lining is closed and the brake is applied to the rotation of the drive shaft 1.

In this state, the chain S on the right side in the drawing hanging via the roller 6 is manually pulled downward. Then, in FIG. 4, first, the roller 6 is pushed by the chain S against the coil springs 41 and 42 and moves rightward until the spacer 32 comes into contact with the mountain-shaped bulging portion 37 of the lever 7. Following the movement of the roller 6, the inclined plate 5 to which the roller 6 is attached also rotates counterclockwise around the stepped bolt 4 as a fulcrum. Then, the inner peripheral surface 35 of the chain wheel 3 comes into contact with the tapered surface 34 of the disk 2. (FIG. 4 (b)).

When the chain S is further pulled, the inclined plate 5 rotates counterclockwise around the contact point between the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disk 2 against the urging force of the coil spring 48. It will rotate in the direction. When the inclined plate 5 rotates, the long hole 15 of the inclined plate 5 moves from the left end to the right end relative to the stepped bolt 4.

When the chain S is further pulled, the long holes 15
Is in contact with the stepped bolt 4 so that the pulling force of the chain S starts to act on the lever 7, and the lever 7 is turned downward around the bolt 39 against the coil springs 41 and 42. Become.

Then, the brake lining opening / closing wire 40 is pulled down in accordance with the rotation (FIG. 4).
(C)), the brake lining is released. When the chain S is further lowered at this stage, the brake lining is released, so that the drive shaft 1 is not braked and the drive torque is reduced by the chain wheel 3, the disc 2, and the input shaft 1.
a to the drive shaft 1 and the shutter is opened.

Next, when the pulling force of the chain S is lost, the pressing force on the roller 6 is first removed, so that the lever 7 rotates upward and returns by the urging force of the coil springs 41 and 42. At the same time, the opening / closing wire 40 is also returned upward by a return urging means (not shown), and the brake lining is brought into a braking state. Further, the inclined plate 5 rotates clockwise by the urging force of the coil spring 48, and the disk 2 and the chain wheel 3 are brought into a non-contact state. At this stage, the left end of the long hole 15 of the inclined plate 5 comes into contact with the stepped bolt 4 again, and the inclined plate 5 returns to the original position by the urging force of the coil spring 42.

The urging force of the coil spring 42 can be easily changed by adjusting the mounting position of the bolt 46a. In such a chain device of a shutter opening / closing device, the brake lining opening / closing wire 40 is pulled down only after the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disk 2 come into contact, and the brake lining is opened. Therefore, only after the brake lining is released first and the shutter starts to descend, the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disk 2 do not come into contact with each other, and a sudden braking force is applied. Since there is no problem, no trouble occurs in each member. Also,
Wear of the contact surface due to excessive friction is also eliminated. Furthermore, the operator is safe because the load of the shutter is not suddenly applied to the chain S.

After the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disk 2 come into contact with each other by adjusting means using the elongated hole 15 and the coil spring 48, the disk 2
When the chain S is continued to be pulled, the brake lining opening / closing wire 40 is pulled down first to release the brake lining, and thereafter the disk 2
The rotation torque of the chain wheel 3 is transmitted to the drive shaft 1 so that the drive shaft 1 is not forced to rotate when the brake lining is in the braking state.

When the shutter is stopped halfway by the stop switch, the chain S can be pulled by pulling the chain S without driving the motor when the shutter is further opened slightly. It is a target.

Further, as in the prior art, this device can be installed while having a shutter stop safety function in the event of a power failure, in which the brake lining is closed when the electromagnetic solenoid is not energized, and the brake lining is temporarily opened following the swing of the inclined plate 5. Work efficiency can be improved without wasteful operations.

In addition, since the mechanism is basically constituted only by the inclined plate 5, the disk 2, the chain wheel 3 and the roller 6, the structure is simple, no trouble is caused and the cost is reduced. I can do it.

Further, since the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disk 2 are rotated by utilizing frictional resistance when pressed, the drive shaft 1 is in a rotating state. Even if the disc 2 and the chain wheel 3 come into contact, the chain S
The risk of getting involved is very small.

Although one embodiment of the present invention has been described in detail, the present invention is not limited to the above-described embodiment, but can be implemented in other forms. For example, in this embodiment, the inclined plate 5 is urged by the coil spring 48 as the engagement adjusting means, but this is formed by forming a roller pressing member 66 at the base of the roller 6 as shown in FIGS. 5A and 5B. It is also possible to use the coil spring 67 disposed inside as the engagement adjusting means. The coil spring 67 has a weaker biasing force than the combined biasing force of the coil springs 41 and 42, and the roller 6 is moved after the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disk 2 come into contact with each other. When the chain S is continuously pulled, first, the long hole 66a is moved rightward so as to push the coil spring 67 back. As the roller 6 moves, the bulging portion 37 is pushed, the lever 7 is turned downward, the brake lining opening / closing wire 40 is pulled down, the brake lining is opened, and then the chain S is further pulled. The driving torque is transmitted to the plate 2.

Similarly, the tapered surface 34 of the disk 2 may be formed of a flexible member that bends when receiving a predetermined pressing force. Also in this case, first, after the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disk 2 come into contact with each other, the tapered surface 34 is bent to move the roller 6.

In this embodiment, the chain wheel 3
Although a short ring chain is wound around the sprocket, it is also possible to wind the roller chain around a sprocket. Further, the engagement between the disk 2 and the chain wheel 3 is the pressing force between the tapered surface 34 and the inner peripheral surface 35. However, if the outer peripheral surface of the disk 2 can be freely pressed against the gear, of course, the engagement of the gear It is also free to do in a joint relationship.

Further, in this embodiment, the chain S is constructed so as to hang down on the upper left side in FIGS. 1 and 4 (a) to 4 (c). The drive shaft 1 may be freely attached to any position.

In this embodiment, the present invention is applied to a shutter. Of course, the present invention can be applied to an iron grid or the like as long as the drive shaft is rotated and raised and lowered. The present invention can be freely modified and implemented without departing from the gist of the present invention, such that a plurality of drive shafts can be freely opened and closed.

[0052]

As described in detail above, the present invention relates to a rotating power transmitting member which rotates following a drive shaft, and a power transmitting member which surrounds the outer circumferential direction of the rotating power transmitting member and is wound around the outer periphery thereof. Is provided with a wheel that is rotated by a wrapping transmission member, and a wrapping transmission member derivative that transmits a driving force to the wheel and the wheel is mounted on the inclined plate, and a brake that is interlocked with the swing of the transmission member derivative is provided. A control member is additionally provided, and an engagement adjusting means is provided so as to release the braking force on the drive shaft of the brake control member after the turning power transmission member and the wheel are engaged with each other. The wheel and the wheel are engaged, and the brake control member operates at least afterwards.When the wrapping transmission member is driven, the member is reliably and manually applied to the drive shaft in a timely manner without impact or excessive load applied to the member. Power is transmitted.

[Brief description of the drawings]

FIG. 1 is a front view showing a wrapping transmission of a switch such as a shutter according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view showing a wrapping transmission of a switch such as a shutter.

FIG. 3 is an exploded perspective view showing a wrapping transmission device of a switch such as a shutter.

FIGS. 4A and 4B are explanatory diagrams for explaining an operation state of a wrapping transmission device of a switch such as a shutter, wherein FIG. 4A is a state in which a wrapping transmission member is not pulled, and FIG. This is a state where the inclined plate is tilted by pulling the member, and (c) is a state where the lever is turned by pulling the wrapping transmission member.

FIG. 5 is a partially enlarged view illustrating an engagement adjusting unit in another embodiment, where a is a front view and b is a plan view.

FIG. 6 is an explanatory diagram illustrating a conventional wrapping transmission device for a switch such as a shutter.

[Explanation of symbols]

1, 1a: drive shaft, 2: rotating disk as power transmission member, 3:
Wheels, 4 bolts as support members, 5 inclined plates, 6 ...
Roller as a transmission member derivative, 15 ... a long hole as an engagement adjusting means, 48 ... a coil spring as an engagement adjusting means, 40 ...
Brake lining opening / closing wire as a brake control member,
66: a roller pressing member as an engagement adjusting means; 67, a coil spring as an engagement adjusting means; S, a chain as a winding transmission member.

Claims (1)

(57) [Scope of request for utility model registration] 1. A drive shaft (1, 1) of a switch such as a shutter.
a) a rotating power transmitting member (2) fitted to a) and rotated in accordance with the rotating motion of the drive shaft (1, 1a); and one enclosing the rotating power transmitting member (2) from its outer peripheral direction. A wheel (3) which is wound around the outer periphery of itself and which is rotated by the transmission driving force of the wound transmission member (S); and the wheel (3) is rotatably mounted. Wear and support member (4)
An inclined plate (5) which can be swung to the right and left around the support member (4) as a rotation center, and wound on the inclined plate (5) via the wheel (3) When the drive transmission force of the wrapping transmission member (S) is applied by wrapping the wrapping transmission member (S), the inclined plate (5)
By rotating the power transmission member (2) and the wheel (3)
Are engaged under pressure and are disengaged in the non-engagement state when inactive, and the oscillating transmission member derivative (6) swings in the direction of disengagement; A brake control member (40) for controlling permission and inhibition of the rotational movement of the drive shaft (1, 1a); and a brake after the turning power transmission member (2) and the wheel (3) are engaged. Engagement adjusting means (15, 48, 66, 67) for adjusting the control member (40) to release the braking force on the drive shaft (1, 1a); Gearing.