JPH0633193Y2 - Torque transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a torque transmission device interposed between a drive shaft and a driven shaft and having a different torque transmission operation to the driven shaft depending on the rotational direction of the drive shaft. It is about.

[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 slats, and when the slats are raised or lowered to the upper or lower limit, an automatic stop device is provided. It operates so that the operation of the motor is automatically stopped.

The automatic stop device is, for example, a first limit switch that is pushed up into the headbox to detect the uppermost slat, 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 lowermost slat 41 and the slide tilter 42 contact the draining surface 43, the slider is initially set in advance so as to contact the second limit switch.

[Problems to be solved by the invention] However, in the slat lifting device as described above, 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. . Therefore, if the torque transmission device capable of absorbing the rotational torque in the slat descending direction of the drive shaft after the slat descends to the lowest limit is interposed between the drive shaft and the slat lifting device, the above problems can be solved. . However, since a pair of such torque transmitting devices are required on the left and right sides of the drive shaft, and the operating directions thereof are relatively opposite to each other, it is necessary to manufacture and assemble the parts suitable for the operating directions. was there. An object of the present invention is to make it possible to configure the torque transmission devices provided on the left and right of the drive shaft with common parts and to easily assemble them.

Structure of the Invention [Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention is attached to both ends of a drive shaft and is composed of a drive-side transmission member and a driven-side transmission member. Torque transmission device in which the mechanical operation directions are opposite to each other at both ends of the drive shaft, the drive side transmission member and the driven side transmission member are opposed to each other and supported so as to be relatively rotatable on the same axis. Protrusions that engage with each other are provided on the opposite surfaces on the same circumference to enable assembly by selecting the engagement direction of both protrusions, and the drive side transmission member is based on the engagement direction of both protrusions. The display means for displaying the mounting positions of the two transmission members with respect to the drive shaft is provided.

[Operation] When the engaging directions of the protrusions of the driving-side transmission member and the driven-side transmission member are rearranged by the above means, the torque transmission operation becomes the opposite direction, and the drive shaft is based on the direction of the torque transmission operation. The mounting direction with respect to is displayed on the display means.

[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 left and right bearing portions 3a, 3b are formed symmetrically and the internal structure is also symmetrical.
The structure will be described with respect to a. As shown in FIGS. 1 and 2, the case 6 of the bearing portion 3a is provided with a connecting piece 7 for connecting the head box 4 on one side, and a torque (described later) on the other side. The 1st accommodating part 8 which accommodates a transmission device is formed, and the 2nd accommodating part 9 which accommodates a sprocket mentioned later is formed in the intermediate part. 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. A drive shaft 12 in the head box 4 is connected at 11. 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 always causes the protrusion 25 of the driven side member 15 to protrude from the protrusion 2 of the drive side transmission member 14.
It is pressed against 0, and in this state "L" as shown in Fig. 5.
The protrusion 2 of the driven side transmission member 15 is inserted into the through hole 22 marked with
The arrow 27 engraved in 5 is exposed. When the drive-side transmission member 14 is rotated by the transmission shaft 10 in the direction of arrow A in FIG. 6, that is, in the slat pulling-up direction, both projections 20 and 25 are directly engaged with each other to transmit both transmission members 1.
When the driving side transmission member 14 is rotated in the arrow B direction in the figure, that is, in the slat descending direction, the rotation torque of the protrusion 20 is transmitted to the protrusion 25 via the coil spring 28. It is like this.

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 to attach the chain 33 to the sprocket 30. A gap 35 is formed between the meshing guides, which guides smoothly toward the insertion holes 31 or 32 and allows the sprocket 30 to rotate. 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 projecting portions 36 projecting obliquely upward toward the chain 33, and the projecting portions 36 are formed. The chain 33, which comes into contact with the inner peripheral surface of 33 and is guided downward by the inner guide 34, 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.

Now, when the drive shaft 12 is rotationally driven in the slat pull-up direction by the motor to pull up the slat 5 of the tuck-in shutter 1, the drive-side transmission member 14 is moved through the connecting tool 11 and the transmission shaft 10 as shown in FIG. It is rotated in the direction of arrow A. 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 if the operation of the automatic stop device is slightly delayed when the slats are lowered than when the slats 5 reach the lower limit, the driving force of the motor is increased by the both projections 20, 25.
Since it can be absorbed by the coil spring 28 between them, it is possible to prevent the overload action on the motor 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, according to the present invention, the torque transmitting device is attached to the left and right of the drive shaft, and the relative operation directions thereof are opposite to each other. An excellent effect that the assembly work can be performed easily and accurately because it can be formed by common parts by changing the direction and the mounting direction to the drive shaft is automatically displayed based on the change. Exert.

[Brief description of 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 front view of the convolution shutter relating to the present invention. Is a perspective view of the driving side and driven side transmitting members constituting the torque transmitting device, FIG. 5 is a side view of one torque transmitting device, and FIGS. 6 and 7 are internal side views showing the operation of the torque transmitting 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 longitudinal sectional view showing a case of the bearing portion.
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. Drive shaft 12, torque transmission device 13, drive side transmission member 1
4, the driven side transmission member 15, the protrusions 20 and 25, the through hole (display means) 22, the identification symbol (display means) 23.

Claims (1)

[Scope of utility model registration request] 1. A torque transmission device which is attached to both ends of a drive shaft and comprises a drive-side transmission member and a driven-side transmission member, the relative operating directions of which are opposite to each other at both ends of the drive shaft. The drive-side transmission member (14) and the driven-side transmission member (15) are opposed to each other and supported so as to be rotatable relative to each other on the same axis, and are engaged with the opposing surfaces of both transmission members (14, 15) with each other. Protrusions (20, 25) are provided on the same circumference, and both protrusions (20, 2)
5) The engagement direction of the both transmission members (14, 15) is selected based on the engagement direction of the protrusions (20, 25) on the drive side transmission member (14) by selecting the engagement direction. Display means (22, 22) for displaying the mounting position with respect to the drive shaft (12)
23) is provided.