JPH087035Y2 - Clutch mechanism in blind lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an elevator opening / closing device for raising and lowering a large number of slats to open and close an opening. The present invention relates to a clutch mechanism for transmitting and cutting off the power of the vehicle to the slat tilting mechanism.

(Prior Art) Conventionally, this type of blind opening / closing device has a main shaft horizontally provided in a frame body above or below an opening, a drive sprocket attached to the main shaft, and a lower or upper part of the opening. A driven sprocket and a chain mounted between the drive sprockets.

A large number of slats are connected by a link mechanism in which the orientation of the slats is variable, and a moving body is attached to the chain.

This moving body is connected to the lowermost end of the link mechanism, and a large number of slats are moved up and down by the movement of the chain.

Further, a slat tilting mechanism that changes the direction of the slat when the opening is closed by a large number of slats is provided coaxially with the main shaft, and a clutch mechanism that transmits and cuts off the power of the main shaft to the slat tilting mechanism is provided.

The present applicant has already applied for Japanese Utility Model Application No. Sho 61-78993 as a clutch mechanism in such a blind lift opening / closing device.

In the previous application, the clutch mechanism is composed of a recess formed in the main shaft and a pin that can be inserted into and removed from the recess, and the pin is separated from the main shaft recess when the opening is fully opened and when the slat is moved up and down. Before the fully closed state, a pin was fitted in the recess of the main shaft, and the power of the main shaft was transmitted to and blocked from the slat tilting mechanism via the pin and the recess.

(Problems to be solved by the invention) However, in such a structure, when the direction of each slat is tilted from open to closed or from closed to open, a high load is applied to the pin and the pin is bent, and the durability is increased. However, there is a problem in terms of the flexibility, and the mechanism for inserting and removing the pin in the recess is complicated.

The present invention relates to an improvement of such an earlier application,
SUMMARY OF THE INVENTION An object of the present invention is to provide a clutch mechanism in a blind lifting / closing device which has excellent durability and can transmit / shut off main shaft power to a slat tilting mechanism with a simple structure.

(Means for Solving the Problems) A configuration of the present invention for achieving the above-mentioned object will be described with reference to the drawings corresponding to the embodiments.

The present invention relates to an engagement pin 49 attached to the chain 15 portion facing the vicinity of the drive sprocket 11 before the opening is fully closed, and a rotation rotatably arranged coaxially with the drive sprocket 11. Plate 40 and cam groove formed on the rotary plate 40
57, a stopper pin 63 attached to the side of the frame 1A, and an engagement piece 59 pivotally attached to the rotary plate 40, capable of appearing and retracting in the cam groove 57, and engageable with and disengageable from the stopper pin 63. Consists of.

The engagement pin 49, the cam groove 57, the engagement piece 59, and the stopper pin 63 rotate the main shaft 9 in a direction to further lower the slat 5 from the front of the slat 5 located at the lowermost end to the lower end of the opening. When it is moved, the engagement pin 49 engages with the engagement piece 59, swings the engagement piece 59, removes the engagement piece 59 from the stopper pin 63, enters the cam groove 57, and engages with the cam groove 57. It is configured to connect the drive sprocket 11 and the rotating plate 40 together,
Further, when the main shaft 9 is rotated in the direction of raising the slat 5 from the state where the slat 5 located at the lowermost end is located at the lower end of the opening and the slat 5 is closed, the slat 5 is engaged in the open state. The pin 49 engages with the engaging piece 59,
59 is rocked to engage the engaging piece 59 with the stopper pin 63,
The engagement pin 49 is configured to be disengaged from the cam groove 57 to release the connection state between the drive sprocket 11 and the rotary plate 40.

(Operation) When the opening is fully opened and lifted, the transmission of the power of the main shaft 9 to the slat tilting mechanism 21 is interrupted, and the power of the main shaft 9 is slatted between before and when the opening is fully closed. It is transmitted to the tilting mechanism 21.

Since the engagement pin 49 can be arranged on a large diameter corresponding to the outer diameter of the tooth portion of the sprocket 11, there is no fear of bending,
Excellent durability.

Further, it has a simple structure using the engagement pin 49, the engagement piece 59, the cam groove 57, and the stopper pin 63.

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partial front view of an elevator opening / closing device, and FIG. 2 is a side view of the same.

1 is a frame body, and the frame body 1 is an upper frame 1A, a lower frame 1B, and left and right vertical frames 1C.
The upper frame 1A, the lower frame 1B, and the vertical frame 1C each have an opening formed therein, and each vertical frame 1C has a guide groove 1D formed therein.

The blind 3 is made up of a large number of slats 5, and the lifting / closing device 7 thereof is laterally provided on the upper frame 1A and the end portions thereof are supporting members 8A, 8B.
Main shaft 9 rotatably supported on the main shaft 9, a drive sprocket 11 attached to the main shaft 9, a chain mounted between the driven sprocket 13 and the drive sprocket 11 mounted on the lower frame 1B.
15, a link mechanism 17 in which a large number of slats 5 are connected to each other so that the direction of the slats 5 is variable, a movable body 19 attached to the chain 15, a slatting mechanism 21 for tilting the direction of the slats 5, and a spindle. 9 and a clutch mechanism 23 for connecting and disconnecting the slat tilting mechanism 21.

As shown in FIG. 3, the main shaft 9 is rotated by the power of the motor 25, and the power of the motor 25 is transmitted to the intermediate shaft 29 through the planetary gear mechanism 27, and the intermediate shaft 29 passes through the gears G1 and G2. Is transmitted to the main shaft 9.

A sun gear 27A is attached to the output shaft 25A of the motor 25, a planetary gear 27B that meshes with the sun gear 27A is supported by an intermediate shaft 29 via a carrier 27C, and an internal gear 27D that meshes with the planetary gear 27B.
Worm wheel 31 with rotatably mounted on the intermediate shaft 29
Attach to the outer periphery of.

A worm gear 33 is meshed with the worm wheel 31, and the worm gear 33 is moved so that the main shaft 9 can be manually moved.

Arms 35 are fixed to both ends of the slat 5 as shown in FIGS. 1 and 2, respectively, and the arms 35 have bearings 36 in the guide grooves 1D.
It is installed so that it can move up and down.

Both ends of each arm 35 are connected to each other by links 37A and 37B, respectively, and the arm 35 and the links 37A and 37B constitute a link mechanism 17 in which the direction of the slat 5 is variable.

The moving body 19 is connected to an arm 35 located at the lowermost end, and the vertical movement of the chain 15 raises and lowers a large number of slats 5 via a link mechanism 17, so that the slats 5 are located before the slats 5 are located at the lower end of the opening. Is open, and further downward movement of the moving body 19 causes the slat 5 to close.

The slat tilting mechanism 21 changes the tilt of the slat 5 via the link mechanism 17, and includes a rotating plate 40 arranged coaxially with the main shaft 9.

The rotary plate 40 is composed of a cam plate 41 rotatably arranged on the main shaft 9 via a bearing 39, and a plate body 45 connected to the cam plate 41 via two rods 43.

Further, the slat tilting mechanism 21 includes tension members 47A and 47A for connecting both ends of the plate body 45 and both ends of the arm 35 located at the uppermost end, respectively.
B, and an engagement pin 49 attached to the chain 15 and the like.

The drive sprocket 11 is located between the cam plate 41 and the plate body 45, and each rod 43 is supported at its intermediate portion by a flange 53 and a cylinder body 55 which are rotatably supported by the drive sprocket 11 via bearings 51. Has been done.

A cam groove 57 is formed on the cam plate 41 as shown in FIG. 4, and an engaging piece 59 is attached to the open end 57A of the cam groove 57 on the cam plate 41.

The engagement piece 59 is rotatably attached to the cam plate 41 by a support shaft 61, and the other end 59B of the engagement piece 59 faces the cam groove 57, and the other end 59B of the engagement piece 59 supports the upper frame 1A. It is formed so that its intermediate portion 59C faces the inside of the cam groove 57 when it is engaged with the stopper pin 63 that is fixed to the cam pin 57 and is disengaged from the stopper pin 63.

The engaging pin 49 is located at the open end 57A of the cam groove 57 before the slat 5 at the lowermost end is located at the lower end of the opening due to the downward movement of the moving body 19, as shown in FIG. 4 (A). Attach to chain 15.

Then, by rotating the drive sprocket 11 in the direction in which the moving body 19 is further moved downward from this state, as shown in FIG. 4 (B), the engagement pin 49 fits into the cam groove 57 and the cam plate 41
Is formed so as to rotate integrally with the drive sprocket 11, and as shown in FIG. 4 (C), the slat 5 is in a fully closed state in which the slat 5 overlaps each other with the cam plate 41 rotated by a predetermined angle. Become.

Further, when the drive sprocket 11 is rotated in the direction to open the slat 5 from the fully closed state shown in FIG. 4 (C), as shown in FIG. 4 (D), in a state before the fully opened state of the slat 5, as shown in FIG. 4 (D). The engagement pin 49 abuts the intermediate portion 59C of the engagement piece 59,
When the slat 5 is fully opened by rotating the engaging piece 59 around the support shaft 61, as shown in FIG.
49 is formed so as to face the open end 57A of the cam groove 57.

Therefore, in this embodiment, the main shaft 9 and the slat tilting mechanism 21 are
The clutch mechanism 23 that connects and disconnects the cam groove 57 formed on the cam plate 41, the engaging piece 59, and the stopper pin attached to the frame body 1 side.
63 and an engagement pin 49 attached to the chain 15.

 Next, the operation will be described.

[Opening of slat 5 and raising of blind] As shown in Fig. 5, the slat 5 located at the lowermost end is located at the lower end of the opening and the slat 5 is closed. Then, the motor 25 is driven to rotate the main shaft 9.

When the slat 5 located at the lowermost end is located at the lower end of the opening and the slat 5 is closed, the engagement pin 49 is engaged with the cam groove 57 as shown in FIG. By the rotation, the cam plate 41 is rotated integrally with the drive sprocket 11 via the engagement pin 49, and the slat 5 is tilted in the direction of opening the slat 5 via one of the tension members 47B.

Then, by further rotation of the main shaft 9, as shown in FIG. 4 (D), the engaging pin 49 abuts on the intermediate portion 59C of the engaging piece 59 to swing the engaging piece 59, As shown in FIG. 6A, with the engagement pin 49 positioned at the open end 57A of the cam groove 57, the direction of the slat 5 is fully open, and each arm 35 is in the state shown in FIG. Thereafter, as the main shaft 9 is further rotated, only the driving sprocket 11 is rotated and the moving body 19 is moved upward, and as shown in FIG.
Is raised, and a fully opened state of the opening is formed. On the other hand, the other end 59B of the engaging piece 59 is engaged with the stopper pin 63 by the swing thereof, and the state shown in FIG. 4 (A) is maintained.

[Descent of Blind and Closing of Slat 5] Next, when the closing button is pressed by operating the hand operation panel in the fully opened state of the opening, the motor 25 is driven to rotate the main shaft 9 in the opposite direction.

The rotation of the main shaft 9 causes the movable body 19 to move downward, and as shown in FIG. 6, the arm 35 is moved downward while sequentially extending the links 37A and 37B.

A little before the movement of the arm 35 located at the lowermost end is finished, as shown in FIG. 4 (A), the engagement pin 49 faces the open end 57A of the cam groove 57, and the main shaft 9 rotates further. Thus, the engagement pin 49 swings the engagement piece 59, the engagement between the engagement piece 59 and the stopper pin 63 is released, and the engagement pin 49 engages with the cam groove 57.

Then, the cam plate 41 rotates integrally with the drive sprocket 11 and tilts the slat 5 in the direction in which the direction is closed via one of the tension members 47A, and in the state shown in FIG. 4 (C),
The slat 5 located at the lowermost end is located at the lower end of the opening, and the slat 5 is fully closed.

[Consideration on Clutch Mechanism 23] In the above operation, the clutch mechanism 23 is attached to the cam groove 57 formed in the cam plate 41, the engaging piece 59, the stopper pin 63 attached to the frame 1 side, and the chain 15. It has a simple structure including the attached engagement pin 49, and the engagement pin 49 is located at a position substantially on the same diameter as the tooth portion of the drive sprocket 11 and at a position sufficiently away from the center of the main shaft 9. Since it is arranged, the load acting on the engagement pin 49 can be reduced, and therefore the engagement pin 49
Can be prevented from bending, and its durability can be improved.

(Effects of the Invention) As is apparent from the above description, according to the present invention, the power for connecting and disconnecting the power between the main shaft and the slat tilting mechanism is excellent in the blind lifting and lowering opening / closing device with excellent durability. It is possible to obtain a clutch mechanism that can

[Brief description of drawings]

FIG. 1 is a partial front view of an elevator opening / closing device, FIG.
The figure is the same side view, FIG. 3 is a front view of the main shaft portion, FIGS. 4 (A) to 4 (D) are relationship diagrams of the rotating plate, the engaging pin and the stopper pin, and FIG. 5 is the lower end of the slat having an opening. 6 is an explanatory view of a link mechanism in which the slat is closed at the lower end of the slat, and FIG. 6 is an explanatory view of the link mechanism in which the lower end of the slat is at the lower end of the opening and the slat is in an open state. It is explanatory drawing of the link mechanism at the time of slat raising / lowering. In the figure, 1 is a frame, 5 is a slat, 9 is a main shaft, 11 is a drive sprocket, 13 is a driven sprocket, 15 is a chain,
17 is a link mechanism, 19 is a moving body, 21 is a slat tilting mechanism,
23 is a clutch mechanism, 40 is a rotating plate, 41 is a cam plate, 49 is an engaging pin, 57 is a cam groove, 59 is an engaging piece, and 63 is a stopper pin.

Claims (1)

[Scope of utility model registration request] 1. A main shaft horizontally provided in a frame body above or below an opening, a drive sprocket attached to the main shaft, and a driven sprocket mounted below or above the opening. And a link mechanism in which a large number of slats are connected to each other so that the direction of the slats can be changed. The chain mechanism is attached to the chain and is connected to the lowermost end portion of the link mechanism. A moving body for moving up and down, and a slat tilting mechanism that is provided coaxially with the main shaft and that is connected to the uppermost end portion of the link mechanism and tilts each slat by the rotation of the main shaft, and is provided between the main shaft and the slat tilting mechanism. And a clutch mechanism for interrupting the transmission of power from the main shaft to the slat tilting mechanism. An engaging pin attached to the chain portion facing the vicinity of the drive sprocket before the fully closed state of the opening, a rotary plate rotatably arranged coaxially with the drive sprocket, and formed on the rotary plate. A cam groove, a stopper pin attached to the frame body side, and an engagement piece pivotally attached to the rotary plate and capable of appearing and retracting in the cam groove and detachable from the stopper pin, The pin, the cam groove, the stopper pin, and the engaging piece engage with the engaging piece when the main shaft is rotated further in the direction of lowering the slat from the front of the slat located at the lowermost end to the lower edge of the opening. Then, the engaging piece is rocked so that the engaging piece is removed from the stopper pin and enters the cam groove, and is engaged with the cam groove to connect the drive sprocket and the rotary plate. The slat located is the lower edge of the opening When the main shaft is rotated from the position where the slat is closed to the direction in which the slat is raised, the engagement pin engages with the engagement piece in the state where the slat is opened, and the engagement piece swings to stop. A clutch mechanism for a blind opening / closing device, which is configured to be engaged with a pin, and the engaging pin is disengaged from a cam groove to release the connection state between the drive sprocket and the rotary plate.