JPH0633192Y2 - Slat lifting device with folding shutter - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention [Industrial field of application] This invention relates to a shutter installed in a doorway or a window of a house, and in particular, when the shutter is opened, a slat is stacked on the upper part and folded up. It is about the shutter.

[Prior Art] Conventionally, a link mechanism is used to connect and support both sides of an independent multi-stage slat as one type of shutter, and the link mechanism is extended and retracted within a guide rail to raise and lower while maintaining the slat in a horizontal direction. In addition, when the slats are lowered to the lowest limit, the convolution shutters are put into practical use in which the respective slats are vertically rotated in the same phase to connect the upper and lower slats so that the shutters are fully closed. Such a slat lifting device for a folding shutter is usually driven by a motor. For example, a drive shaft is rotationally driven by the motor in a head box that connects the upper ends of both guide rails, and the drive shaft drives a chain or the like in each guide rail. The transmission means is driven up and down. And
A slide tilter is connected to the lower end of the link mechanism, and the slide tilter is raised and lowered by a chain to expand and contract the link mechanism to raise and lower the slat, and an automatic stop device when the slat is raised or lowered to the upper or lower limit. Is activated and the motor is automatically deactivated.

The automatic stop device is, for example, a first limit switch that detects the uppermost slat pushed up in the headbox and a second limit switch that detects the amount of movement of the slider that slides in the headbox based on the rotation of the drive shaft. And a switch. Then, when the slat is raised, the first limit switch detects the uppermost slat pushed up to the predetermined position to detect that the slat has been pulled up to the upper limit. Is detected by the limit switch, and the operation of the motor is stopped when the bottom slat 41 and the slide tilter 42 rotated vertically as shown in FIG. 12 come into contact with the draining surface 43. It has become. That is, when the bottom slat 41 and the slide tilter 42 contact the draining surface 43,
The slider is pre-initialized to abut the second limit switch.

[Problems to be Solved by the Invention] However, in the above slat lifting device, if the initial setting of the lowermost position of the slat is not accurate, the lowermost slat 41 and the slide tilter 42 hit the draining surface 43. The motor may stop before coming into contact with it, or the motor may continue to operate even after coming into contact with the draining surface 43, causing a failure. Therefore, the bottom slat 41 and slide tilter 42
There is a problem that the initial setting for accurately stopping the operation of the motor at the time of contact with the drainage surface 43 requires fine adjustment at each shutter installation site, and the adjustment work is complicated. . The purpose of this invention is to stop the motor in a state in which the bottom slat and the slide tilter are surely brought into contact with the draining surface, to easily perform the initial setting, and to provide them on the left and right sides of the drive shaft. It is an object of the present invention to provide a slat elevating device that allows a torque transmitting device to be configured with common parts, facilitates its assembly, and improves durability.

Configuration of the Invention [Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention has a slat lifting device installed inside guide rails located on both sides of the slat, and the slat having a plurality of upper and lower slats. The sprocket is rotatably supported on the upper end of the guide rail, and the sprocket is rotatably supported by a motor. The drive shaft is rotatably driven by a motor. The chain is driven by the sprocket based on the rotation of the drive shaft. In a convolution shutter equipped with an automatic stop device capable of driving the slat lifting device and automatically stopping the operation of the motor when the slat is lowered to the lowest limit, between the left and right ends of the drive shaft and the respective sprockets. A torque transmission device is interposed between the drive transmission units and the torque transmission device is fixed to one end of the drive shaft. And a driven-side transmission member fixed to the sprocket, the driving-side transmission member and the driven-side transmission member are opposed to each other to be relatively rotatable on the axis of the drive shaft. Providing engaging projections on the same circumference to enable assembly by selecting the engagement direction of both projections, on the circumference where the projections of both transmission members are provided, in the circumferential direction An elastic member that expands and contracts along the line is interposed.

[Operation] By the above means, even if the motor slightly operates after the slat is lowered to the lowest limit, the rotational torque is absorbed by compressing the elastic member in the torque transmission device. or,
If the engagement directions of the protrusions of the drive-side transmission member and the driven-side transmission member are rearranged, the torque transmission operation will be reversed, and by incorporating an elastic member based on the direction of the torque transmission operation, the drive shaft The torque transmission devices provided on the left and right sides can be constituted by common parts, and the assembly thereof becomes easy. Further, since the rotation torque is absorbed based on the expansion and contraction of the elastic member, it is possible to contribute to the durability of the elastic member and, in turn, the durability of the torque transmission device.

[Embodiment] An embodiment embodying the present invention will be described below with reference to the drawings. As shown in FIG.
Has a pair of guide rails 2 standing upright on both sides thereof, and bearing portions 3a and 3b fixed to the upper ends thereof.
The head box 4 is supported between 3b. And
A motor (not shown) is arranged in the head box 4, and when a drive shaft described later rotatably supported in the head box 4 is rotationally driven by the motor, it is guided by a slat elevating device in the guide rail 2. Each slat 5, which is supported in multiple stages vertically between the rails 2, can be moved up and down and rotated. The motor is capable of forward and reverse rotation based on the operation of an operation switch (not shown), and prevents rotation of the drive shaft except when it is in operation. Further, the head box 4 is provided with an automatic stop device similar to that of the conventional example, and automatically stops the operation of the motor when the slat 5 is moved up and down to the upper limit or the lower limit.

The bearing portions 3a and 3b on the left and right of the guide rail 2 are formed symmetrically and the internal structure is also symmetrical, so that the bearing portion 3a on the left side is formed.
The structure will be described with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the case 6 of the bearing portion 3a is formed with a connecting piece 7 for connecting the head box 4 on one side, and the torque transmission described later on the other side. A first accommodating portion 8 for accommodating the device is formed, and a second accommodating portion 9 for accommodating a sprocket described later is formed at an intermediate portion. A transmission shaft 10 penetrating the first and second accommodating portions 8 and 9 is rotatably supported in the case 6, and a coupling tool 11 is fitted to the proximal end of the transmission shaft 10 to form the coupling tool. Drive shaft 1 in head box 4 at 11
It is connected to 2. Therefore, when the drive shaft 12 is rotationally driven by the motor, the transmission shaft 10 is integrally rotated.

A torque transmission device 13 is attached to the tip of the transmission shaft 10 in the first housing portion 8. The torque transmission device 13 is supported so that the disk-shaped drive-side and driven-side transmission members 14 and 15 face the transmission shaft 10, and the drive-side transmission member 14 is fixed to the tip of the transmission shaft 10 with a screw 16. . Therefore, the drive side transmission member 14 is adapted to rotate integrally with the transmission shaft 10.

The driven-side transmission member 15 is rotatably supported by a partition portion 18 between the first accommodating portion 8 and the second accommodating portion 9 by a shaft portion 17 formed in the central portion of the outer side surface of the shaft portion 17. Is projected to the second accommodating portion 9, and the transmission shaft 10 is rotatably penetrated into the shaft portion 17 of the second accommodating portion 9.

A guide groove 19 having a semicircular cross section is formed along the periphery of the inner surface of the drive side transmission member 14, and a protrusion 20 having a semicircular cross section that divides the guide groove 19 at two locations is provided on the drive side. The transmission members 14 are formed so as to face each other with the center of the transmission member 14 interposed therebetween. Guide protrusions 21 that project toward the driven-side transmission member 15 are formed at the tops of the protrusions 20, and through holes 22 are formed in the guide grooves 19 on both sides of each protrusion 20. Then, as shown in FIG. 5, on the outer surface of the drive side transmission member 14, an identification symbol 23 of “L” or “R” is imprinted in the vicinity of the through holes 22 which are opposed to each other with the center interposed therebetween. It constitutes display means.

A guide groove 24 having a semicircular cross section is formed along the peripheral edge of the inner surface of the driven side transmission member 15 similarly to the driving side transmission member 14, and the guide groove 24 is divided into two parts. The protrusions 25 are formed at positions facing each other with the center of the driven side transmission member 15 interposed therebetween. A guide hole 26 is formed in the bottom of each guide groove 24 along the guide groove 24, and an arrow 27 directed toward the center is engraved on the top of each protrusion 25.

Driving-side and driven-side transmitting member 1 configured as described above
In the assembled state shown in FIG. 1, the protrusions 4 and 15 of the drive side transmission member 14 are located in the guide grooves 24 of the driven side transmission member 15, and the guide protrusions 21 project into the guide holes 26. As shown in the figure, the projection 2 of the driven side transmission member 15
5 is located in the guide groove 19 of the drive side transmission member 14. Further, as shown in FIG. 6, a coil spring 28 is inserted between the protrusions 20 and 25, and the urging force of the coil spring 28 causes the protrusion 25 of the driven-side transmission member 15 to always protrude. In this state, the arrow 27 engraved on the projection 25 of the driven side transmission member 15 is exposed in the through hole 22 engraved with "L" in this state. . Then, the drive shaft transmission member 14 is moved by the transmission shaft 10.
6 is rotated in the direction of arrow A in FIG. 6, that is, in the direction of pulling up the slat, both projections 20 and 25 are directly engaged with each other, and both transmission members 14 and 15 are integrally rotated. When it is rotated in the B direction, that is, the slat descending direction,
The rotational torque of the protrusion 20 is transmitted to the protrusion 25 via the coil spring 28.

On the other hand, in the torque transmission device housed in the bearing portion 3b on the right side, the drive side and driven side transmission members 14 and 15 and the coil spring 28 as an elastic member are assembled as shown in FIG. Then, as shown in FIG. 9, the arrow 27 engraved on the projection of the driven side transmission member 15 is exposed in the through hole 22 engraved with "R" in the vicinity. Then, the drive-side transmission member 14 is rotated in the direction of arrow C in FIG. 8 to pull up the slat 5, and at the same time, the arrow D
The slat 5 is lowered by being rotated in the direction, and at this time, the same action as that of the torque transmission device 13 in the left bearing portion 3a is performed.

A hexagonal shaft 29 is formed at an intermediate portion of the shaft portion 17 of the driven-side transmission member 15 protruding into the second accommodating portion 9, and the sprocket 30 is fitted to the hexagonal shaft 29 to form the sprocket 30. It is adapted to rotate integrally with the driven side transmission member 15. As shown in FIG. 11, the second storage portion 9
The bottom surface 9a of the sprocket is curved along the sprocket 30, and insertion holes 31 and 32 are formed at positions corresponding to both sides of the sprocket 30, and the chain 33 hooked on the sprocket 30 is lowered from the insertion holes 31 and 32. Is guided into the guide rail 2. And sprocket 3
When the chain 33 in the guide rail 2 is moved up and down by the rotation of 0, the slat elevating device operates in the guide rail 2 so that each slat 5 is moved up and down and rotated.

Inside the both insertion holes 31, 32 below the sprocket 30, an inner guide 34 protruding upward from the bottom surface 9a is formed, and the inner guide 34 abuts on the inner peripheral surface of the chain 33 so that the chain 33 is retained. A gap 35 is formed between the inner guide 34 and the inner guide 34, which smoothly guides the sprocket 30 from its meshing state with the insertion hole 31 or 32. Further, since the lower end of the inner guide 34 is slightly retracted from the openings of the insertion holes 31 and 32, both ends of the bottom surface 9a become projections 36 projecting obliquely upward toward the chain 33.
Comes into contact with the inner peripheral surface of the chain 33, and the inner guide 34
The chain 33, which is guided downward by, is guided into the insertion holes 31 and 32.

An outer guide 37 formed by bending a wire is arranged around the chain 33. The outer guide 37 is bent in an inverted U shape so that the middle portion thereof follows the chain 33 mounted on the sprocket 30, and both end portions are bent sideways to form a mounting portion 38. 38 is supported by a locking recess 39 provided below the insertion holes 31 and 32. The outer guide 37 is positioned in close contact with the outer periphery of the chain 33 in the second accommodating portion 9, and the chain 33 moves while slidingly contacting the outer guide 37.

Next, the operation of the bearing portions 3a and 3b configured as described above will be described.

When the motor drives the drive shaft 12 to rotate in the slat pull-up direction in order to pull up the slat 5 of the folding shutter 1, the drive-side transmission member 14 causes the drive-side transmission member 14 to move through the connector 11 and the transmission shaft 10 in FIG. Is rotated in the direction. Then, the projection 20 of the drive-side transmission member 14 directly abuts the projection 25 of the driven-side transmission member 15, so that both the transmission members 14,
15 rotates integrally, and the chain 33 is driven by the sprocket 30 that rotates integrally with the driven side transmission member 15. When the chain 33 is driven, the slat elevating device in the guide rail 2 operates to pull up the slat 5, and when the slat 5 is pulled up to the maximum limit, the automatic stop device operates and the operation of the motor is stopped.

On the other hand, the drive shaft 1 is driven by the motor to lower the slat 5.
When 2 is rotationally driven in the slat lowering direction, the drive side transmission member 14 is rotated in the direction of arrow B in FIG. Then, the rotational torque of the drive-side transmission member 14 is transmitted to the driven-side transmission member 15 via the coil spring 28. When the slat is lowered, the load acting on the driven-side transmission member 15 is small, so that the rotational torque is transmitted with the coil spring 28 being hardly contracted, and the chain 33 is driven via the sprocket 30. Then, when the chain 33 is driven, the slats 5 are lowered. In this way, when the slat 5 is lowered and the lowermost slat comes into contact with the draining surface to prevent further movement of the slat lifting device, movement of the chain 33 in the same direction is blocked,
Rotation of the driven side transmission member 15 in the direction of arrow B in FIG. 6 is prevented. At this time, if the automatic stop device is not yet activated, only the drive side transmission member 14 is rotated in the same direction by the driving force of the motor, and as shown in FIG. 7, between the projections 20 and 25 of both transmission members 14 and 15. The coil spring 28 is compressed,
Here, when the automatic stop device operates, the drive side transmission member 14 stops in the state shown in FIG.

Therefore, in the folding shutter 1, even when the operation of the automatic stop device is slightly delayed when the slats are lowered from the time when the slat 5 reaches the lower limit, the driving force of the motor is absorbed by the coil spring 28 between the protrusions 20 and 25. Because you can
It is possible to prevent the motor from being overloaded and prevent the failure of the motor and the slat lifting device.
As a result, there is no problem even if the initial setting of the automatic stop device is not strictly performed and rough initial setting is performed with the operation timing slightly delayed.

On the other hand, in the bearing portion 3a, the outer periphery of the chain 33 mounted on the sprocket 30 is supported by the outer guide 37, so that the chain 33 is reliably prevented from falling off from the sprocket 30. Further, the inner circumference of the chain 33 is guided directly below the sprocket 30 from the sprocket 30 to the insertion hole 31 or 32 by the inner guide 34 and the protrusion 36, so that the sprocket 30 and the second accommodating portion 9 are guided. It is possible to reliably prevent the chain 33 from being caught between the bottom surface 9a and the bottom surface 9a, and to drive the chain 33 smoothly.

Further, in the folding shutter 1, the bearing portions 3a, 3
Drive side and driven side transmission members 14 and 15 common to the torque transmission device 13 in b are used. That is, in the bearing portion 3a on the left side, the projections 20 and 2 of both transmission members 14 and 15 are formed.
5 and the coil spring 28 are assembled at the position shown in FIG. 6, and in this state, the arrow 27 is exposed in the through hole 22 marked with "L" on the outer surface of the drive side transmission member 14 as shown in FIG. To be done. In the right bearing portion 3b, each protrusion 2
0 and 25 and the coil spring 28 are assembled at the position shown in FIG. 8, and in this state, as shown in FIG. 9, an arrow mark is drawn in the through hole 22 marked with “R” on the outer surface of the driven side transmission member 15. 27 is exposed. Then, in the torque transmission device 13 configured as described above, similar operations are performed in synchronization in the left and right bearing portions 3a and 3b based on the rotation of the drive shaft 12. Therefore, the parts of the torque transmission device 13 in the left and right bearings 3a and 3b can be made common to reduce the cost, and at the time of assembly thereof, the arrow 27 exposed in the through hole 22 of the drive side transmission member 14 can be used. Since either left or right is displayed by the "L" or "R" identification mark 23 imprinted in the vicinity of the through hole 22, the assembling work can be performed easily and accurately.

Effect of the Invention As described in detail above, this invention has the slat lifting device installed inside the guide rails located on both sides of the slat, and the slat lifting device supports a plurality of upper and lower slats, respectively. A sprocket is rotatably supported, and a drive shaft that is driven to rotate by a motor is connected to the sprocket.The slat lifting device can be driven by a chain that is driven by the sprocket based on the rotation of the drive shaft. In a convoluted shutter equipped with an automatic stop device that automatically stops the operation of the motor when it is lowered to the lower limit, the initial setting of the automatic stop device may be roughly set so that the operation timing is slightly delayed. The setting work can be performed easily and quickly, and even with such a rough initial setting, It is possible to prevent the action of overload on the elevator and slat lifting device. Also, if the engaging directions of the protrusions of the drive-side transmission member and the driven-side transmission member are rearranged, the torque transmission operation will be reversed, and by incorporating an elastic member based on the direction of the torque transmission operation, the drive The torque transmission devices provided on the left and right of the shaft can be constituted by common parts, and the assembly thereof becomes easy. Further, since the rotation torque is absorbed based on the expansion and contraction of the elastic member, it is possible to contribute to the durability of the elastic member and, in turn, the durability of the torque transmission device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing one torque transmission device of a convolution shutter embodying the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a convolution shutter relating to the present invention. FIG. 4 is a perspective view of drive-side and driven-side transmission members constituting the torque transmission device, FIG. 5 is a side view of one torque transmission device, and FIGS. 6 and 7 are the torque transmission device. 8 is an internal side view of the other torque transmission device, FIG. 9 is a side view of the other torque transmission device, and FIG. 10 is a vertical cross-sectional view showing the case of the bearing portion. 11
10 is a sectional view taken along the line EE in FIG. 10, and FIG. 12 is a schematic view showing the lower part of the shutter when the folding shutter according to the present invention is fully closed. Guide rail 2, head box 4, slat 5, drive shaft 12, torque transmission device 13, drive side transmission member 14, driven side transmission member 15, projections 20 and 25, coil spring (elastic member) 28, sprocket 30, chain. 33.

Claims (1)

[Scope of utility model registration request] 1. A slat lifting device is installed inside guide rails located on both sides of the slat, and a plurality of upper and lower slats are supported by the slat lifting device, and a sprocket is rotatably supported on the upper end of the guide rail. A drive shaft that is driven to rotate by a motor is connected to the sprocket, and the slat lifting device can be driven by a chain that is driven by the sprocket based on the rotation of the drive shaft. In a convolution shutter provided with an automatic stop device for automatically stopping the operation, a torque transmission device (13) is interposed between each of the left and right ends of the drive shaft (12) and each sprocket (30), A drive side transmission member (1) having the torque transmission device (13) fixed to one end of a drive shaft (12).
4) and the driven side transmission member (15) fixed to the sprocket (30), and the driving side transmission member (14) and the driven side transmission member (15) are opposed to each other and the shaft of the drive shaft (12). Both transmission members (14, 15) are allowed to rotate relative to each other.
Protrusions (20, 25) that engage with each other are provided on the opposite surfaces of the same on the same circumference so that the protrusions (20, 25) can be assembled by selecting the engagement direction of both protrusions (20, 25). 14,
A slat lifting device for a folding shutter, characterized in that an elastic member (28) that expands and contracts along the circumferential direction is interposed on the circumference provided with the protrusions (20, 25) of (15).