JPH0561397U - Winding transmission device for opening and closing devices such as shutters - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a winding transmission device capable of manually opening and closing a shutter or the like when the winding transmission member is manually operated. A rotary power transmission member 2 that rotates in response to a rotary motion of a drive shaft 1, and a wheel 3 that surrounds the rotary power transmission member 2 and has a winding transmission member S wound around itself. The inclined plate 5 to which the wheel 3 and the winding transmission member guide 6 are attached and which is stopped by the support member 4, the winding transmission member S via the wheel 3 and the winding transmission member guide 6, and the winding Engagement adjustment for releasing the braking force of the brake control member 40 to the drive shaft after the brake control member 40 interlocked with the swing of the transmission member guide 6 and the turning power transmission member S and the wheel 3 are engaged. And means.
As a result, when the winding transmission member S is pulled down, the turning force is reliably transmitted to the drive shaft 1 by human power in a timely and reliable manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a winding transmission device for an opening / closing device such as a shutter installed on a ceiling.

[0002]

[Prior Art]

 Conventionally, in the case of shutters that are opened and closed by an electric motor, a sprocket that rotates integrally with the shutter drive shaft is fitted to the drive shaft of the shutter so that it can be opened and closed manually even when power is not supplied. A chain wheel was installed in the surroundings in a non-contact state, and the chain was wound around the chain wheel. Then, when the power was stopped, the lever adjacent to the chain wheel was operated to release the non-contact state, so that the sprockets and the internal gear of the chain wheel meshed with each other to manually operate the chain to open the shutter. ..

Also, when returning to the current state again, it is necessary to operate the lever in the same manner, release the meshing between the sprocket and the chain wheel, and convert the operation into electric operation again. It was troublesome and dangerous to operate the opening / closing device such as the shutter at every power failure. Furthermore, the peripheral mechanism of the chain wheel is complicated, and defects are more likely to occur, resulting in higher costs.

In order to solve these problems, the present inventor first applied for a winding transmission device for an opening / closing device such as a shutter in Japanese Patent Application No. 3-43562, and mechanically and easily shutters the shutter. We provided a switch that can open and close the door.

An embodiment of a winding transmission device for an opening / closing device such as a shutter disclosed in Japanese Patent Application No. 3-43562 will be described with reference to FIGS. 6 (a) and 6 (b). The wrapping transmission device 65 is attached and used, for example, near the upper ceiling of an opening for partitioning a room. When the shutter is opened / closed by a normal electric operation, the open / close switch is operated to rotate the drive shaft 60, and the disc 51 attached to the drive shaft 60 is operated as shown in FIG. It is designed to rotate integrally with the drive shaft 60 without contacting the chain wheel 52.

At the time of power failure, rotation of the drive shaft 60 is stopped and electric shutter opening / closing becomes impossible. At the same time, the electromagnetic solenoid is de-energized and a brake lining (not shown) is driven to close. The brake is applied to the rotation of the shaft 60.

[0007] In this state, the chain S on the right side of the drawing that is hanging down via the roller 53 is manually pulled downward. Then, in FIG. 6B, the roller 53 is first pushed by the chain S and moves to the right, and accordingly, the mountain-shaped bulging portion 55 of the lever 54 to which the roller 53 is attached is pushed to move the lever 53. Rotate 54 downward. Then, since the brake lining open / close 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 the non-excited state due to a power failure because the brake lining is released. Becomes

At the same time, the tilt 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 eccentrically opposite to the disk 51 and is chain wheel 52. The inner peripheral surface 52a is pressed against the disk 51, and the rotational torque is transmitted between the two members 51 and 52. Then, if the chain S is continuously turned as it is, torque is transmitted from the disc 2 to the drive shaft 60 in reverse, and the shutter is opened.

[0009]

[Problems to be solved by the device]

 According to this method, the shutter can be easily opened at the time of power failure simply by lowering the chain S in the winding transmission device of the opening / closing device such as the shutter.

However, the timing of pulling down the opening / closing wire 56 does not always coincide with the timing of pressing the inner peripheral surface 52a of the chain wheel 52 against the disc 51, and a slight deviation may occur in the operation start timing of both. It was

As a result, when the opening / closing wire 56 is first pulled down and the brake lining is opened, the shutter is lowered by its own weight, and then the inner peripheral surface 52a of the chain wheel 52 and the disc 51 come into contact with each other. As a result, the sudden braking is applied and a large impact is applied to the member, which may cause a problem. Further, since the friction is large, the contact surfaces of the inner peripheral surface 52a and the disc 51 will be rapidly reduced.

On the contrary, when the inner peripheral surface 52a of the chain wheel 52 and the disk 51 come into contact with each other first, the drive shaft 60 is rotated while the braking is applied, and the drive shaft 60 is manually operated. It is too heavy and too much load is applied to the member.

Therefore, there has been a demand for a technique for surely matching the timing of pulling down the opening / closing wire 56 and the timing of pressing the inner peripheral surface 52a of the chain wheel 52 against the disc 51.

The present invention eliminates the discrepancy between the opening timing of the brake lining when the winding member is manually operated and the timing of transmitting the rotational force of the winding member to the drive shaft, and the shutter can be opened and closed quickly. A hanging transmission device is provided.

[0015]

[Means for Solving the Problems]

 In order to solve the above problems, the present inventor has found that a rotary power transmission member that is fitted to a drive shaft of an opening / closing device such as a shutter and rotates by following the rotational movement of the drive shaft, and the rotary power transmission unit. While surrounding the material from its outer peripheral direction, a wheel which is wrapped around the outer periphery of itself and is rotated by a transmission driving force by the winding transmission member, and a wheel which is rotatably attached, A slant plate that can be swung to the left and right around the support member as a center of rotation by a support member, and a winding transmission member that is attached to the slant plate and is wound around the wheel. When the drive transmission force of the hanging transmission member acts, the inclined plate is swung to engage the turning force transmission member and the wheel under pressure, and when not acting, the winding is swung in the disengaged state. For the hanging transmission member guide and the swinging of the winding transmission member guide. The brake control member that moves and controls the rotation of the drive shaft, and after releasing the braking force of the brake control member to the drive shaft after the turning power transmission member and the wheel are engaged. It was decided to provide an engagement adjusting means for adjusting so as to do so.

[0016]

[Action]

 According to the above configuration, when the winding driving member is pulled when the external driving force disappears and the opening / closing device such as the shutter cannot open / close when de-energized, the winding driving member derivative is activated by the engagement adjusting means. As a result, the wheel and the rotational force transmission member first engage with each other. Further, when the winding transmission member is continuously pulled, the brake control member is actuated again to release the braking force to the drive shaft and the rotational force of the winding transmission member is transmitted to the drive shaft.

[0017]

【Example】

 An 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 is composed of an alloy-made front fixing plate 11 having a plane cross-section and a kite-like shape, and a side plate cross-section also having an alloy-like back plate 12. The front fixing plate 11 covers the back plate 12 so as to cover the back plate 12, and insertion holes are formed in the ribs 13 of the back plate 12 from the front, bottom, left and right four corners of the front fixing plate 11 and are screwed with the small screws 14.

An electromagnetic solenoid (not shown) is attached to the inside of the chain device body 10, and the brake lining of the brake mechanism of the shutter opening and closing device (not shown) which is normally provided in the excited state and is provided on the back surface of the back plate 12 is opened. The brakes are not applied when opening and closing the shutter. When the emergency stop switch is input or a power failure occurs, the brake lining is closed and breaks due to the non-excited state.

A hole 12 a is bored in the back portion of the chain device 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. In addition, a hole 18 is also formed in the front portion of the chain device body 10, that is, substantially in the center of the center surface of the front face fixing plate 11, and the cylindrical portion 19 is formed inside the chain device body 10 along the hole 18 and along the hole 18. It is formed substantially at a right angle to the front surface of 10. The drive shaft 1 and the input shaft 1a are connected to each other in the chain device body 10 via a shaft joint 16 that is fastened with a bolt 17 so as to be integrally rotatable. The a is received by the rolling bearing 20 attached to the tubular portion 19, and the tip end thereof is projected from the hole 18 of the chain device body 10.

On the front surface of the chain device body 10, an inclined plate 5 made of an alloy and formed in a front keyhole shape is arranged. The slant plate 5 is provided with a long hole 15 extending in the lateral direction in the upward direction, and the stepped bolt 4 fastened to the front fixing plate 11 is inserted into the long hole 15. Therefore, the inclined plate 5 is swingably locked to the front fixing plate 11, and can be slid to the left and right by the length of the long hole 15 with respect to the stepped bolt 4.

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

A hole 21 larger than the hole 18 is formed in the inclined plate 5 at a position corresponding to the concentric axis of the front hole 18 of the front fixing plate 11, and as shown in FIG. Along the front surface of the chain device main body 10, there is formed a tubular portion 22 extending to the front side at a substantially right angle, and the tip edge 22a thereof is bent inward at a substantially right angle.

A slightly curved long hole 44 is bored below the tubular portion 22, and a screw 45 screwed into the front surface of the chain device body 10 is inserted through the long hole 44 so that the inclined plate 5 does not incline more than necessary. It has become.

Further, a fixing plate 43 is fixed below the elongated hole 44, and one ends of coil springs 41 and 42, which will be described later, are attached to the fixing plate 43. A rolling bearing 24 is arranged between the inclined plate 5 and the front surface of the chain device 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 the small diameter portion 26a from the front of the cylindrical portion 22 of the inclined plate 5, and the ring is fitted on the small diameter portion 26a and the peripheral portion of the small diameter portion. A rolling bearing 24 is fixed among the member 27, the cylindrical portion 22, the cylindrical portion distal end 22a, and the spacer 23.

The chain wheel 3 is fastened to the frame 26 by bolts 28 on the periphery of the large diameter portion of the frame 26. The chain wheel 3 is composed of a pair of symmetrical alloy discs fixed to each other by bolts 28. When the chain wheel 3 is assembled, a groove 29 is formed on the outer periphery thereof. The short ring chain S is wound around this, and the ring portion is engaged with the convex portions 30 projectingly formed in the groove portion 29 at predetermined intervals to drive the chain S manually.

A disc 2 serving as a rotational 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 circumference of the disc 2 and the chain wheel 3 so as to maintain the two in a non-contact state, and the space between the axis of the disc 2 and the axis of the hole 21 of the inclined plate 5 is defined. As long as they match, that is, if the inclined plate 5 is not inclined or only slightly inclined, it is in a non-contact state. As described above, the inclined plate 5 is normally biased to the right by the coil spring 48, and the stepped bolt 4 is relatively positioned at the left end of the elongated hole 15. Therefore, as shown in FIG. 1, the state where the stepped bolt 4 is located at the left end of the elongated hole 15 corresponds to the case where the axis of the disc 2 and the axis of the hole 21 of the inclined plate 5 coincide with each other.

A tapered surface 34 is formed on the outer peripheral edge of the disk 2, and when the chain wheel 3 and the disk 2 are relatively eccentric, the tapered surface 34 is 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 when the chain S is further pulled.

The disc 2 is fixed by a spline at the tip of the input shaft 1a, but it is of course possible to use a key or the like. A roller 6 made of a synthetic resin having a bolt inside is attached to the inclined plate 5 on the lower left side of the front face by tightening a nut 33 through a spacer 32 for alignment with the chain wheel 3, and in FIG. The chain S which is hung around 3 and hung from the right side is guided to the left and hung around.

A guide ring 8 is fixed to the lower left side of the front surface of the chain device body 10 toward the lower left side of the front face of the chain device 3 as shown in FIG. Has been done.

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

A latching portion 38 is formed on the tip end side of the lever 7, and a lower attachment ring of a brake lining opening / closing wire 40 for activating an opening / closing mechanism of the brake lining (not shown) is latched. A mountain-shaped bulge 37 is formed in the upper part of the lever 7 near the center of the chain device body 10, and becomes integral with the inclined plate 5 when the inclined plate 5 is inclined to the right in FIG. It is pushed by the spacers 32 that move in a vertical direction.

A coil spring 41 is locked to the bulged portion 37 of the lever 7 and always urges the lever 7 upward. Further, one end of the coil spring 42 is attached to a fixing plate 47 fixed to the side surface of the chain device body 10 with a bolt 46a and a nut 46b. The combined biasing force of the coil springs 41 and 42 is considered to have a stronger biasing force than the coil spring 48 interposed between the standing portion 5a and the coil spring fixing bolt 61. There is.

In this chain device, the member is attached to the chain S so as to hang down to the left side in FIG. 1, but it is also possible to hang the chain S to the right side depending on the installation situation of this device to the shutter. Mounting holes 49 and 50 for the roller 6 and the guide ring 8 are formed in left and right 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 body 10.

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

At the time of a power failure, the drive shaft 1 and the input shaft 1a connected to the drive shaft 1 stop rotating, making it impossible to electrically open and close the shutter. At the same time, the electromagnetic solenoid is de-energized and the brake is applied. 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 down 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 is moved to the right until the spacer 32 comes into contact with the chevron-shaped bulge 37 of the lever 7. Following the movement of the roller 6, the tilt plate 5 to which the roller 6 is attached also rotates counterclockwise about the stepped bolt 4. Then, the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disc 2 come into contact with each other. (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 circular plate 2 against the biasing force of the coil spring 48. It comes to rotate in the direction. Then, as the inclined plate 5 rotates, the elongated hole 15 of the inclined plate 5 moves relative to the stepped bolt 4 from the left end to the right end.

When the chain S is further pulled, the right end of the elongated hole 15 comes into 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 moved to the coil springs 41 and 42. Against this, the bolt 39 is rotated downward.

Then, the brake lining opening / closing wire 40 is pulled down in accordance with the rotation (FIG. 4C), and the brake lining is opened. If the chain S is further pulled down at this stage, the brake lining is released, so the drive shaft 1 is not controlled and the drive torque is applied to the chain wheel 3, the disc 2, the input shaft 1a and the drive shaft 1. It is transmitted smoothly and the shutter is opened.

Next, when the pulling force of the chain S disappears, first, the pressing force on the roller 6 disappears, so that the lever 7 is rotated upward by the urging force of the coil springs 41 and 42 to return. At the same time, the opening / closing wire 40 is also returned upward by the returning urging means (not shown), and the brake lining is brought into a braking state. Further, the inclined plate 5 is rotated clockwise by the urging force of the coil spring 48 so that the disc 2 and the chain wheel 3 are not in contact with each other. 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 is returned to the original position by the biasing force of the coil spring 42.

The biasing force of the coil spring 42 can be easily changed by adjusting the mounting position of the bolt 46a. In the chain device of such a shutter opening / closing device, the brake lining opening / closing wire 40 is pulled down and the brake lining is opened only after the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disc 2 contact each other. Therefore, the brake lining is released first and the shutter starts to descend, so that the inner peripheral surface 35 of the chain wheel 3 and the taper surface 34 of the disc 2 do not come into contact with each other abruptly. Since no power is applied, no trouble will occur in each member. Further, wear of the contact surface due to excessive friction is eliminated. Further, the operator is safe because the load of the shutter is not suddenly applied to the chain S.

Further, after the inner peripheral surface 35 of the chain wheel 3 and the taper surface 34 of the disc 2 come into contact with each other by the adjusting means by the elongated hole 15 and the coil spring 48, the driving force is immediately transmitted to the disc 2. However, if the chain S is continuously pulled, the brake lining open / close wire 40 is first pulled down to release the brake lining, and only after that, the rotational torque of the chain wheel 3 is transmitted to the disc 2. , It is not necessary to forcibly rotate the drive shaft 1 when the brake lining is in the braking state.

In addition, when the shutter is stopped halfway by the stop switch, the chain S can be pulled without the need to drive it by the motor when opening the shutter slightly further, without wasting power. It is economical.

Further, as in the conventional case, this device can be installed while having a shutter stop safety function at the time of power failure that the brake lining is closed when the electromagnetic solenoid is not excited. Since it can be opened, useless operations are not required and work efficiency can be improved.

Further, mechanically, basically, the structure is simply composed of the inclined plate 5, the circular plate 2, the chain wheel 3 and the roller 6, and the structure is simple and no troubles are caused easily. Can be achieved.

Furthermore, since the inner peripheral surface 35 of the chain wheel 3 and the taper surface 34 of the circular plate 2 are rotated by utilizing frictional resistance caused by pressure contact, when the drive shaft 1 is in a rotating state by any chance. Even if the disc 2 and the chain wheel 3 come into contact with each other, the risk of winding the chain S is very small.

Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment and can be implemented in other modes. For example, in this embodiment, the inclined plate 5 was biased by the coil spring 48 as the engagement adjusting means, but a roller pressing member 66 is formed 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 this 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 makes contact between the inner peripheral surface 35 of the chain wheel 3 and the taper surface 34 of the disc 2. When the chain S is subsequently pulled, first, the elongated hole 66a is moved to the right so as to push back the coil spring 67. Then, as the roller 6 moves, the bulging portion 37 is pushed and the lever 7 is rotated downward, the brake lining opening / closing wire 40 is pulled down, the brake lining is released, and then the chain S is further pulled, For the first time, the drive torque is transmitted to the disc 2.

Similarly, the tapered surface 34 of the circular plate 2 itself may be made of a flexible member that is bent by receiving a predetermined pressing force. Also in this case, first, the inner peripheral surface 35 of the chain wheel 3 and the tapered surface 34 of the disc 2 contact each other, and then the tapered surface 34 is bent to move the roller 6.

Further, in this embodiment, the short ring chain is wound around the chain wheel 3, but it is also possible to wind the short ring chain around the sprocket. Further, the engagement between the disc 2 and the chain wheel 3 was the pressing force between the taper surface 34 and the inner peripheral surface 35, but if the outer peripheral surface of the disc 2 can be pressed against each other, of course, the engagement of the gears is possible. It is also free to do so in a relationship.

Further, in this embodiment, the chain S is configured to hang down to the left side in the upper part of FIGS. 1 and 4 (a) to 4 (c). It is free to hang it down, and it is also possible to attach it to the drive shaft 1 at any position.

Further, in this embodiment, the invention is applied to a shutter, but of course, even if it is an iron grid or the like, it can be freely applied to this as long as it rotates a drive shaft to move up and down. Further, a plurality of drive shafts can be provided side by side so that they can be opened and closed freely. For example, the present invention can be freely modified and implemented without departing from the spirit of the invention.

[0052]

[Effect of the device]

 As described in detail above, the present invention includes a rotating power transmission member that is rotated by being driven by a drive shaft, surrounds the outer peripheral direction of the rotating power transmission member, and winds the transmission member around the outer periphery. While a wheel that rotates with a winding transmission member is provided, the inclined plate is equipped with the wheel and a winding transmission member guide that transmits driving force to the wheel, and a brake control member that interlocks with the swing of the transmission member guide is installed. First, the rotation power transmission member and the wheel are connected to each other by providing the engagement adjusting means so as to release the braking force of the brake control member to the drive shaft after the rotation power transmission member and the wheel are brought into the engaged state. Since the brake control member operates at least after that, when the winding transmission member is driven, the driving force is not applied to the member and excessive load is applied to the member in a timely and reliable manner, and the driving force is applied to the drive shaft. It is reached.

[Brief description of drawings]

FIG. 1 is a front view showing a winding transmission device of an opening / closing machine such as a shutter according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view showing a winding transmission device of an opening / closing machine such as a shutter.

FIG. 3 is an exploded perspective view showing a winding transmission device of an opening / closing device such as a shutter.

FIG. 4 is an explanatory view for explaining an operating state of a winding transmission device of a switch such as a shutter, in which (a) shows a state in which a winding transmission member is not pulled and (b) shows a winding transmission. The inclined plate is tilted by pulling the member, and (c) is the state in which the lever is rotated by pulling the winding transmission member.

5A and 5B are partially enlarged views for explaining an engagement adjusting means in another embodiment, in which a is a front view and b is a plan view.

FIG. 6 is an explanatory diagram illustrating a conventional winding transmission device for an opening / closing device such as a shutter.

[Explanation of symbols]

1, 1a ... Drive shaft, 2 ... Circular power transmission member disk, 3 ...
Wheel, 4 ... Support member bolt, 5 ... Inclined plate, 6 ...
Roller which is a transmission member guide, 15 ... Long hole which is engagement adjusting means, 48 ... Coil spring which is engagement adjusting means, 40 ...
Brake lining, which is a brake lining open / close wire,
66 ... Roller pressing member as engagement adjusting means, 67 ... Coil spring as engagement adjusting means, S ... Chain as wrapping transmission member.

Claims (1)

[Scope of utility model registration request] 1. A drive shaft (1,1) of an opening / closing device such as a shutter.
a) a rotary power transmission member (2) fitted to a) and rotated by following the rotary motion of the drive shaft (1, 1a), and one that surrounds the rotary power transmission member (2) from the outer peripheral direction thereof. , A wheel (3) that winds a winding transmission member (S) around its own circumference and rotates by the transmission driving force of the winding transmission member (S), and the wheel (3) is rotatably mounted. Wear and support members (4)
A slant plate (5) which can be swung to the left and right around the support member (4) as a rotation center, and is attached to the slant plate (5) and wound through the wheel (3). When the drive transmission force of the winding transmission member (S) is actuated by rotating the suspension transmission member (S), the inclined plate (5)
By swinging the rotating power transmission member (2) and the wheel (3)
And a winding transmission member guide (6) that swings in an engaging state under pressure, and swings in a non-engagement state when not operating, and in conjunction with swinging of the winding transmission member guide (6), A brake control member (40) for controlling the allowance and prevention 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 so as to release the braking force to the drive shaft (1, 1a) of the control member (40), and winding of an opening / closing machine such as a shutter provided with Transmission.