JP2005048900A - Clutch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact clutch device switching a driving shaft and a driven shaft adjacent to each other in the axial direction intermittently. <P>SOLUTION: This clutch device C switching the driving shaft 13 and the driven shaft 9 adjacent to each other intermittently is composed of a clutch body 15 which is formed into a cylindrical shape, is displaced in the axial direction from a clutch connection position where it is externally fitted in the outer peripheries of both shafts 9, 13 so as to lock, and is freely displaced up to a clutch disconnection position where it is externally fitted in the outer periphery of either of the shafts so as to lock, an energizing elastic machine 20 energizing the clutch body 15 toward the clutch connection position, and displacement means (a first rotary body 16, a second rotary body 17) which are provided at the outer periphery of the clutch body 15 and displaces the clutch body 15 between the clutch connection position and the clutch disconnection position by rotating in one direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention belongs to the technical field of a clutch device provided in an electric switch or the like in an architectural switch that opens and closes an opening.

  In general, in an electric switch provided in an architectural switch that opens and closes an opening, when the switch is a shutter device, the switch is linked to a winding drum that winds up a shutter curtain. In this case, conventionally, the electric motor constituting the switch has been provided in a positional relationship in which the yoke and the output shaft extending from the yoke are parallel to the winding drum. For this reason, the opening / closing machine is supported in a cantilevered manner by the bracket of the shutter case in which the winding drum is stored, so that not only the centering is difficult, but also between the opening / closing machine and the winding drum, Since a predetermined gap must be provided in a state where the shutter curtain is wound around the winding drum and has a maximum diameter, there has been a problem that the shutter case becomes large.

As an improvement measure, the electric motor constituting the switch is assumed to have a flat yoke, and the flat yoke is provided in a positional relationship parallel to the bracket of the shutter case. Has been proposed (Patent Document 1), whereby the installation space of the switch can be made compact.
By the way, the thing of the said patent document 1 becomes a structure which outputs the rotational drive of an electric motor via the worm wheel which is a deceleration mechanism, and in this thing, it opens and closes so that a shutter curtain can be opened and closed manually at the time of a power failure In the case where a clutch device is provided in a power transmission path between a machine and a winding drum, a clutch device is known that is provided between a worm wheel and an output shaft (Patent Document 2).
Japanese Patent Laid-Open No. 2002-227569 Japanese Utility Model Publication No. 61-23198

  The conventional clutch device is provided with a torque transmission member on the output shaft side that is in a power connected state by engaging with a worm wheel, a slide ring is integrally connected to the torque transmission member, and the slide ring is rotated. The torque transmitting member is engaged with and disengaged from the worm wheel by sliding in the axial direction based on the rotation of the ring. However, this method has a problem that the structure is complicated and complicated, the assembling work is troublesome, adjustment is difficult, and the number of parts increases. In addition, as an operation (clutch operation) for switching the power transmission state, it is configured to switch by rotating the rotating ring forward or backward, and a pair of operation strings for rotating the rotating ring is prepared. Then, the clutch device is switched to the clutch disengaged state by operating one of the operating strings, and switched to the clutch engaged state by operating the other operating string. For this reason, when a power failure occurs and it is urgently desired to manually open and close, a malfunction that pulls the wrong operation string is assumed, there is a possibility that the necessary operation may not be performed quickly, and there is a problem, Here is the problem to be solved by the present invention.

The present invention has been created in view of the above-described circumstances and has been created for the purpose of solving these problems. The invention of claim 1 intermittently connects the drive shaft and the driven shaft adjacent in the axial direction. The clutch device to be switched is formed in a cylindrical shape, and is displaced in the axial direction from a clutch connecting position that is fitted around the outer periphery of both shafts so as to be non-rotating. A clutch body that is freely displaceable, an urging means that urges the clutch body toward the clutch continuation position, and a clutch continuation position and a clutch of the clutch body that are provided on the outer periphery of the clutch body and rotate in one direction. Displacement means for causing displacement between the disconnection positions is provided.
According to a second aspect of the present invention, in the first aspect, the displacing means is externally fitted to the cover body in which the clutch body is accommodated and the clutch body so as to be relatively rotatable and movable in the axial direction together with the clutch body. The first rotating body in which the concave and convex portions are alternately formed on one end surface in the axial direction with a predetermined rotation angle, and the movement in the axial direction with respect to the cover body is restricted but relative rotation Is provided freely, a second rotating body in which a concave portion and a convex portion similar to the one end surface of the first rotating body are formed on the contact surface with the one end surface of the first rotating body, and the first rotating body A restricting member for restricting rotation, an engaging body formed on the outer peripheral surface of the second rotating body, an engagement receiving body meshing with the engaging body and guiding the rotation of the second rotating body, and the engaging receiving body The engagement receiving body is moved from the non-operating position to the operating position so as to rotate the second rotating body in one direction at a predetermined rotation angle. Are those configured by including an operating device for displacing, and a return bullet machine for returning the displaced operating member in the operative position to the inoperative position to the.
According to a third aspect of the present invention, in the second aspect, the rotation angle of the engagement receiver from the non-operating position to the operating position exceeds the rotation angle forming the concave portion and the convex portion of the second rotating body contact surface. Is set to.
According to a fourth aspect of the present invention, in the clutch device according to the second or third aspect, the clutch device includes a restriction claw for restricting the second rotating body from rotating in the opposite direction when the second rotating body rotates at a predetermined rotation angle. It is provided.
According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the clutch device is used in an open / close device for an electric shutter for construction.

According to the first aspect of the present invention, the clutch body is provided on the outer periphery of the driven shaft and the drive shaft, and can be made compact without being elongated in the axial direction.
According to the invention of claim 2, the clutch pair can be displaced to the clutch engagement position and the clutch disengagement position based on the rotation of the second rotating body in one direction, and the operation is simple and easy. It can respond quickly.
With the invention of claim 3, the displacement operation of the clutch body is ensured, and a highly reliable clutch device can be obtained.
With the invention of claim 4, the displacement operation of the clutch body is ensured, and a highly reliable clutch device can be obtained.
According to the invention of claim 5, the shutter device can be made compact.

Next, embodiments of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a shutter curtain that constitutes an electric shutter device for construction, and the shutter curtain 1 is wound around a winding drum 3 that is rotatably mounted in a shutter case 2 disposed on the ceiling side of the housing opening. Has been. The shutter curtain 1 is opened at both side edges of the shutter curtain 1 as the winding drum 3 rotates forward or backward based on the driving of the driving device 4 linked to the winding drum 3. It is configured to move up and down while being guided by guide rails 5 erected on both left and right sides, thereby opening and closing the opening, and these basic configurations are all conventional. Yes.

  The winding drum 3 is integrally disposed on a fixed shaft 3a, wheels 3b that are rotatably fitted to the fixed shaft 3a in a plurality of axial directions, and outer peripheral surfaces of the plurality of wheels 3b. And the stay 3c. In the present embodiment, one end of the fixed shaft 3a, that is, the right end in the drawing in FIG. 1, is a concave groove-shaped shaft support portion fixed to the right bracket 6 constituting the right side surface of the shutter case 2. (Not shown) is fixed in a detent shape.

On the other hand, the other end portion (left end portion) of the fixed shaft 3a is fixed to the left bracket 7 disposed on the left side surface of the shutter case 2, and the left bracket 7 is formed in substantially the same shape as the right bracket 6 and fixed. A body portion 7b in which a boss-like shaft support portion 7a for fixing the left end portion of the shaft 3a is formed, and an extension portion 7c formed in a state of extending forward at the front end edge portion of the body portion 7b are integrated. It is comprised in what was formed, and the drive device 4 is provided here.
A driven-side first sprocket 8 constituting the driving device 4 is provided on the outer periphery of the shaft support portion 7a. The first sprocket 8 is formed with a cylindrical shaft core portion 8a, and the shaft The core portion 8a is set so as to be rotatably fitted to the outer peripheral surface of the shaft support portion 7a. Here, the first sprocket 8 is formed on the left end side (left bracket 7 side) of the shaft core portion 8a, and has a larger diameter than the shaft core portion 8a at the right side portion of the first sprocket 7. A large-diameter cylindrical portion 8b is formed, and the left end portion of the stay 3c is connected to the large-diameter cylindrical portion 8b, so that the winding drum 3 and the first sprocket 8 are set to rotate integrally.

On the other hand, a second sprocket 9 on the drive side constituting the drive device 4 is supported on the left bracket extension 7c. That is, the disc-shaped support plate 7d is fixed to the left bracket extension 7c, and the left end portion of the boss portion 7e is fixed to the extension 7c so as to penetrate the support plate 7d. The boss portion 7e protrudes rightward, and the cylindrical shaft core portion 9a of the second sprocket 9 is fitted to the boss portion 7e in a rotatable state. The second sprocket 9 is formed on the left end side of the shaft core portion 9a and is set so as to be in the same axial position as the first sprocket 8, and the right half of the second sprocket shaft core portion 9a. Gear teeth (hereinafter referred to as driven gear teeth) 9b are formed on the outer peripheral surface of the portion, and the second sprocket 9 formed in this way corresponds to the driven shaft of the present invention.
A chain 8c is suspended between the second sprocket 9 and the first sprocket 8, and the first sprocket 8 is rotated by the rotation of the second sprocket 9 as will be described later. The take-up drum 3 is set to rotate either forward or backward.

On the other hand, the electric motor M with a speed reducing mechanism that constitutes the drive device 4 includes a bottomed cylindrical yoke 10, and the yoke 10 has a pair of radially opposed inner cylinder surfaces having a predetermined diameter. It is formed in the circular arc cylinder part 10a which it has, and the flat flat part 10b of flat form was formed between these arc cylinder parts 10a. A motor shaft 11 is rotatably supported on the yoke 10 thus formed in a flat cylindrical shape, and a worm 11a is engraved at a tip portion protruding from the opening end of the yoke 10 of the motor shaft 11. ing. The opening end of the yoke 10 is covered with a case body 12, and a cylindrical worm wheel housing portion 12a is formed in the case body 12. The worm wheel housing portion 12a is formed at the tip of the motor shaft 11. A worm wheel 13 that meshes with the worm 11a is accommodated. The electric motor M is configured such that an output shaft (corresponding to a drive shaft of the present invention) 13a of the worm wheel 13 protrudes from a through hole 12c opened in one cylindrical end surface 12b of the worm wheel housing portion 12a. The output shaft 13a is set to output in a state where the rotational force of the motor shaft 11 is decelerated.
Here, the projecting end portion (tip portion) of the output shaft 13a has drive side gear teeth 13b formed on the outer periphery of the half portion on the cylinder end surface 12b side (right side), and the drive side gear teeth 13b The sprocket 9 is engraved with the same shape and the same period as the driven gear teeth 9b formed on the outer periphery of the right half of the two sprockets 9, and the output shaft 13a thus formed corresponds to the drive shaft of the present invention. is doing. Further, the protruding tip portion 13c of the output shaft 13a is formed to protrude to the left side of the drive side gear tooth 13b forming portion, and the protruding tip portion 13c is the second sprocket shaft in the assembled state of the electric motor M described later. It is set so as to be inserted into the tip end cylindrical hole of the core portion 9a in a relatively rotatable state, and in this inserted state, the tip of the drive side gear tooth 13b and the tip of the driven side gear tooth 9b on the second sprocket 9 side Are set to be concentric and close to each other.

The clutch device C according to the present invention is configured in a unit built in advance on the electric motor M side, and is set so as to be interlocked and connected to the second sprocket 9. The clutch bracket 14 is integrally fixed to a cylinder end surface (case body cylinder end surface) 12b on the side from which the output shaft 13a of the worm wheel housing portion 12a of the electric motor M projects.
The clutch bracket 14 has a circular flat plate-like main body portion 14a fixed to the case body cylinder end surface 12b, and is bent from the outer peripheral edge portion of the main body portion 14a so as to be displaced toward the left bracket 7 side. And a flange-shaped attachment piece 14b extending in the direction. A through hole 14c is formed in the main body portion 14a, and the inner diameter of the through hole 14c is larger than the outer diameter of the guide piece portion 12d formed in a protruding shape at the outer diameter portion of the through hole 12c of the case body cylinder end surface 12b. Is also formed with a large diameter, and is set so that a predetermined gap is formed between the inner diameter of the main body through hole 14c and the outer diameter of the guide piece 12d.

  On the other hand, reference numeral 15 denotes a clutch body according to the present invention. The clutch body 15 is formed in a cylindrical shape having a predetermined length, and is prevented from rotating by a driven side gear tooth 9b and a driving side gear tooth 13b on the inner surface of the cylinder. A clutch gear 15a that is externally fitted and meshed is formed. And the ring-shaped 1st rotary body 16 which comprises the displacement means of this invention is integrated in the external fitting form via the retaining ring 16a in the left side part (the driven gear tooth 9b internal fitting side) of clutch body 15 outer periphery. It is. The first rotating body 16 is rotatable relative to the clutch body 15, but is restricted from moving in the axial direction with respect to the clutch body 15, and is provided so as to move integrally with the clutch body 15 in the axial direction. It has been. Further, the first end surface 16b, which is the right end surface of the first rotator 16 (end surface on the driving side gear teeth 13b), has recesses 16c and protrusions 16d that are alternately continuous and have a predetermined rotation angle. (90 degrees in the present embodiment) are formed two by two in the circumferential direction. Further, in the outer diameter portion of the first rotating body 16, there are formed notched grooves 16 e that are located in two circumferential directions and are long in the radial direction and penetrate in the axial direction.

And the 2nd rotary body 17 formed in the bottomed cylinder shape so that the clutch body 15 in which the 1st rotary body 16 was incorporated in a cylinder may have the through-hole 17a which the output shaft 13a penetrates in a cylinder bottom part. It has been established. A ring-shaped fitting piece 17b is provided on the bottom of the cylinder so as to project rightward. The fitting piece 17b is electrically connected to the body through hole 14c of the clutch bracket 14 incorporated in the electric motor M and the electric motor M. The second rotating body 17 is set so as to be rotatable with respect to the clutch bracket 14 by fitting in the gap formed between the guide piece 12d on the motor M side. Accordingly, the second rotating body 17 is set so that the movement to the right in the axial direction is restricted by the clutch bracket main body portion 14a.
On the other hand, the clutch body 15 and the first rotating body 16 are internally fitted so that the first rotating body first end face 16b faces the cylinder bottom of the second rotating body 17, and the second rotating body 17 It is incorporated so as to be rotatable relative to the single rotating body 16. Further, the clutch body 15 and the first rotating body 16 are set so as to be freely displaceable in the axial direction along the cylinder inner peripheral surface of the second rotating body 17.

Further, the second rotating body 17 has a concave portion 17d and a convex portion 17e similar to the first end surface 16b on a second end surface 17c that is an outer diameter side portion of the cylinder bottom portion that is a contact surface with the first end surface 16b. Two are formed in the circumferential direction in a state where they are alternately continuous and have a predetermined rotation angle (90 degrees). As a result, the first and second rotating bodies 16 and 17 are in close proximity with the second end surface convex portion 17e facing the first end surface concave portion 16c and the first rotating body 16 (clutch body 15) and the second end surface convex portion 17c. The rotating body 17 is brought into a close positional relationship, and the second rotating body 17 is rotated from this state, and the first end surface recessed portion 16c and the second end surface recessed portion 17d, and the first end surface protruding portion 16d and the second end surface protruding portion 17e are brought into contact with each other. When facing the separated posture, the first rotating body 16 is displaced to the left side in the axial direction of the clutch body 15 together with the clutch body 15, so that a gap is formed between the recesses 16c and 17d so as to be separated from each other. Is set to
Further, the outer peripheral surface of the right end portion of the second rotating body 17 has a rotation angle corresponding to the rotation angle (90 degrees) of the concave portion 17d and the convex portion 17e, and the second rotating body 17 is directed to the predetermined direction. The ratchet teeth 17f (corresponding to the engagement body of the present invention) having a step formed on the base end side in the rotation direction so as to allow rotation in the reverse direction but to restrict the rotation in the reverse direction are located at four places in the circumferential direction. Is formed.

Furthermore, 18 is an operating tool for rotating the second rotating body 17, and a main body portion 18 a formed of a ring-shaped plate material of the operating tool 18 includes a clutch bracket main body portion 14 c, a second rotating body 17, and the like. Between these, it is provided in a state of being slidably sandwiched. The main body portion 18a is integrally formed with a ratchet claw (corresponding to an engagement receiving body of the present invention) 18b that meshes with the ratchet teeth 17f of the second rotating body 17. Here, the ratchet claw 18b is formed of a material having rigidity and spring property, and engages with the second rotating body 17 so that the rotation in the predetermined direction together with the second rotating body 17 rotates integrally and the rotation to the other. Is provided so as to be relatively rotatable, and thereby, the second rotary body 17 is set to be rotated and guided by rotating the operation tool main body 18a in a predetermined direction at a predetermined rotation angle. ing.
Further, an attachment piece 18c is integrally formed on the main body portion 18a, and an operation cord 18d hanging downward is connected to the attachment piece 18c. Based on the pulling operation of the operation cord 18d, the main body portion 18a and the The two-rotary body 17 is set to rotate.

In this manner, the clutch bracket 15, the first and second rotating bodies 16 and 17, and the operation tool 18 are assembled in the clutch bracket 14, and the bottomed cylindrical shape is formed so as to cover these members. The clutch device C is configured by attaching the cover body 19, and the cover body 19 is an urging ammunition (corresponding to the urging means of the present invention) 20 between the bottom piece 19 a and the first rotating body 16. The fixing pieces 19b formed at three locations around the opening edge in the circumferential direction are fixed to the clutch bracket 14 by screwing them with screws 19c. Yes.
In this fixed state, the clutch body 15 is pressed so as to be positioned on the clutch connecting position side under the urging force of the urging ammunition 20, and the shaft of the second rotating body 17 is supported by the bottom piece 19 a of the cover body 19. It is set to restrict movement to the left in the direction. The cover body bottom piece 19a is formed with a regulation claw 19d toward the inside of the cylinder. By engaging the regulation claw 19d with a notch groove 16e formed in the first rotary body 16, The one rotating body 16 is set so as to be subject to rotation regulation.
Further, the operating tool 18 is in a state where the ratchet pawl 18b is engaged with the ratchet teeth 17f of the second rotating body 17, and the mounting piece 18c is formed between the two fixing pieces 19b in the circumferential direction of the cover body 19. It is provided so as to be displaced along the outer peripheral surface. Of these fixed pieces 19b, the second rotating body 17 is moved to a predetermined position by displacing from the non-operating position where it is locked to the upper fixed piece 19b to the operating position where it is locked to the other fixed piece 19b. The direction is set to rotate at a predetermined rotation angle. The rotation angle between the non-operating position and the operating position of the mounting piece 18c is set so as to slightly exceed the rotation angle (90 degrees) between the concave portions 16c and 17d and the convex portions 16d and 17e ( In this embodiment, it is set so as to guarantee a predetermined rotation angle necessary for the second rotating body 17 to change between the approaching posture and the separating posture.

  Reference numeral 21 denotes a return ammunition interposed between the clutch bracket 14 and the operating tool mounting piece 18c. The return ammunition 21 biases the mounting piece 18c toward the non-operating position. The attachment piece 18c displaced to the operating position side by the pulling operation of the operating string 18d is set so as to return to the non-operating position side with the disappearance of the pulling operation of the operating string 18d. Here, a stopper claw 19e that meshes with a ratchet tooth 17f that is different from that engaged with the operation tool ratchet claw 18b of the second rotary body 17 is integrally formed in the outer peripheral portion of the cover body 19 by notches. ing. As a result, the second rotating body 17 rotates at a predetermined rotation angle (90 degrees) based on the pulling operation of the operation string 18d, and the attachment piece 18c receives the urging force of the return ammunition 21 to return to the inoperative position. Is set so that the second rotating body 17 together with the operation tool main body 18a is restricted from rotating in the reverse direction.

Thus, the electric motor M in which the clutch device C is incorporated is incorporated in a state where the inner periphery of the clutch body 15 is externally fitted to the driven gear teeth 9b of the second sprocket 9 of the left bracket extension 7c. The bracket mounting piece 14b is fixed to the left bracket 7 by screwing the support plate 7d provided on the left bracket extension 7c with a screw 14d. In this attached state, the electric motor M is attached to the left bracket 7 in a state in which the yoke flat portion 10b and one cylindrical end surface 12b of the worm wheel housing portion 12a face each other. The arrangement space is as small as possible.
In the mounted state, the driven shaft that is the second sprocket 9 and the drive shaft that is the output shaft 13a on the electric motor M side are interlocked and connected via the clutch device C, and the protruding tip 13c of the output shaft 13a. As described above, the tip is fitted into the cylindrical hole 9d of the second sprocket shaft core portion 9a in a rotatable state and is the left end surface of the drive side gear teeth 13b formed on the output shaft 13a. And the projecting end surface, which is the right end surface of the driven gear teeth 9b of the second sprocket 9, are arranged concentrically and in close proximity to each other, and the clutch body 15 is connected to the driven gear teeth 9b and the drive side. It is set so as to be fitted on both shafts with the gear teeth 13b or the driven gear teeth 9b.
Incidentally, the operation string 18d pulled out from the operation tool 18 fixes the clutch bracket 14 to the left bracket extension portion 7c so that the rotation of the attachment piece 18c from the non-operating position to the operating position can be secured by the downward pulling operation. It is configured to be pulled out downward by engaging with the screw 14d.
In addition, 22 is a drive part cover body which covers the attachment site | part of the clutch apparatus C and the electric motor M. FIG.

Next, the power transmission state between the driving device 4 and the second sprocket 9 will be described.
First, in a normal use state of the shutter device, the clutch device C is in a power connected state. In this state, as shown in FIG. It is set to mesh with both the gear teeth 13b and the driven gear teeth 9b. In this state, the first and second rotating bodies 16 and 17 are in a proximity posture, and are biased toward the right side (drive side gear teeth 13b side) by receiving the biasing force of the biasing ammunition 20. ing. And when the electric motor M drives and the motor shaft 11 rotates and the output shaft 13a rotates in the decelerated state, the clutch body 15 is a 2nd sprocket (driven shaft) with the output shaft (drive shaft) 13a. 9 is rotated.

  On the other hand, by pulling the operating string 18d of the operating tool 18, the second rotating body 17 is moved to a predetermined rotating angle (a rotating angle exceeding 90 degrees) with respect to the first rotating body 16 subjected to the rotation restriction by the cover body 19. ) Only forcibly rotate, the first and second rotating bodies 16 and 17 are separated from each other so that the first concave portion 16c and the second concave portion 17d and the first convex portion 16d and the second convex portion 17e face each other. The first rotating body 16 is displaced together with the clutch body 15 to the left side (the driven gear tooth 9b side) against the biasing ammunition 20, and as shown in FIG. 5B, the driving side gear teeth 13b. Is disengaged and is displaced so as to be displaced to a clutch disengagement position that meshes only with the driven gear teeth 13b. When this state is reached and the pulling operation of the operating string 18d is stopped, the operating tool 18 receives the urging force of the return ammunition 21 and returns to the non-operating position. The ratchet pawl 18b is set so as to mesh with the ratchet teeth 17f adjacent to each other in the anti-predetermined rotation direction while maintaining a separated posture under the rotation restriction by the stopper pawl 19e of the body 19. In this state, the clutch body 15 is in a power cut-off state in which the clutch body 15 can freely rotate together with the second sprocket 9 without being restricted by the output shaft 13a. It is configured to be able to operate.

  Then, when switching from this state to the power connection state again, the operation string 18d of the operation tool 18 is pulled again, thereby rotating the second rotating body 17 at a predetermined rotation angle (90 degrees). By doing so, the first and second rotating bodies 16 and 17 are brought into a close attitude, whereby the clutch body 15 is displaced to the clutch engagement position and the clutch device C is set in the power connection state.

  In the present embodiment configured as described, the electric motor M constituting the driving device 4 is configured with a speed reducer provided with the worm wheel 13, and the flat portion 10b is formed on the yoke 10, The installation space of the electric motor M does not increase in the axial direction of the winding drum 3, and the size can be reduced. And in this thing, the clutch apparatus C provided between the output shaft 13a used as the drive shaft by the side of the electric motor M and the 2nd sprocket 9 interlockingly connected with the winding drum 3 used as a driven shaft is used as the output shaft. 13a and the second sprocket 9 are located in the clutch disengaged position where they are externally fitted, and the power disengaged state, and if they are located in the clutch disengaged position where only the second sprocket 9 is externally fitted, the power disengaged state is established. The clutch device provided between the adjacent drive shaft 13a and the driven shaft 9 is not configured to be connected in the axial direction. Therefore, by providing the clutch device C, there is no need for a space between the output shaft 13a and the driven shaft 9, and it is possible to prevent the drive device 4 from becoming longer in the axial direction and impairing compactness. .

  Moreover, in the present embodiment, the displacement means for displacing the clutch body 15 from the clutch engagement position to the clutch disengagement position is made by relative rotation of the first and second rotary bodies 16 and 17 provided on the outer periphery of the clutch body 15, The clutch device C is not elongated in the axial direction, and the configuration of the displacement means for displacing the clutch body 15 can be simplified. In addition, the operation for switching the clutch device C is performed by rotating the second rotating body 17 in one direction at a predetermined rotation angle, and the power is switched to the disconnected state every time the operating string 18d is pulled. become. As a result, even when a power failure occurs and it is urgently desired to manually open and close, it is only necessary to pull one operating string 18d, and the switching operation of the clutch device C can be performed reliably without malfunctioning. Can be done quickly.

  In addition, in this case, the rotation angle of the second rotating body 17 that rotates by pulling the operating string 18d once is larger than the rotation angles of the concave and convex portions 17d and 17e formed in the second rotating body 17. Since the rotation angle is set, and the stopper claw 19e provided on the cover body 19 is subjected to the rotation restriction in the reverse direction from the state rotated at the predetermined rotation angle in the predetermined direction, the displacement operation of the clutch body 15 is further improved. It becomes reliable and it can be set as a highly reliable clutch apparatus.

  And in this thing, since the clutch apparatus C will be provided in the outer periphery of the 2nd sprocket (driven shaft) 9 and the output shaft (drive shaft) 13a, of the drive device 4 accommodated in the shutter case 2 The installation space can be reduced in the axial direction, and the shutter case can be made compact.

  Of course, the present invention is not limited to the embodiment described above, and the uneven portions formed on the contact surfaces of the first and second rotating bodies may be three and four, respectively. In this case, the stroke for rotating the second rotating body to switch the clutch can be reduced.

It is a whole front view explaining the outline of a shutter device. It is a side view of the state which removed the electric motor with a clutch from the left side bracket. It is a side view of a left side bracket. FIG. 4 is a bottom view of FIG. 3. 5A and 5B are cross-sectional views showing the clutch engaged state and the disengaged state of the electric motor with the clutch device, respectively. It is sectional drawing in a clutch apparatus site | part. It is a disassembled perspective view of a clutch apparatus. It is a disassembled perspective view of a clutch apparatus. It is a side view of an electric motor with a clutch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shutter curtain 2 Shutter case 3 Winding drum 7 Left side bracket 7c Extension part 8 1st sprocket 9 2nd sprocket 9b Driven side gear teeth 10 Yoke 11 Motor shaft 13 Warm wheel 14 Clutch bracket 15 Clutch body 16 1st rotary body 16c Recessed part 17 Second Rotating Body 17e Convex 17f Ratchet Teeth 18 Operation Tool 18c Ratchet Claw 19 Cover Body 20 Energizing Ammo 21 Return Ammo

Claims (5)

A clutch device that intermittently switches between a drive shaft and a driven shaft adjacent in the axial direction is formed in a cylindrical shape, and is displaced in the axial direction from a clutch continuous position that is fitted around the outer periphery of both shafts in a non-rotating manner. A clutch body that can be displaced to the clutch disengagement position that is fitted to the outer periphery of one shaft in a non-rotating manner, an urging means that urges the clutch body toward the clutch engagement position, and provided on the outer periphery of the clutch body in one direction. A clutch device comprising displacement means for causing the clutch body to displace between the clutch engagement position and the clutch disengagement position by rotating. 2. The displacement means according to claim 1, wherein the displacing means is externally fitted to the cover body in which the clutch body is accommodated and the clutch body so as to be relatively rotatable and movable in the axial direction together with the clutch body. And the convex portion are formed in a circumferential direction alternately with a predetermined rotation angle, and the movement in the axial direction is restricted with respect to the cover body, but relative rotation is freely provided, A second rotating body in which a concave portion and a convex portion similar to the one end face of the first rotating body are formed on a contact surface with the one end face of the first rotating body, and a regulating member for regulating the rotation of the first rotating body; , An engaging body formed on the outer peripheral surface of the second rotating body, an engagement receiving body meshing with the engaging body to guide the rotation of the second rotating body, and connected to the engaging receiving body for the second rotation Displace the engagement receiver from the non-actuated position to the actuated position to rotate the body in one direction at a predetermined angle of rotation. And Sakugu, clutch apparatus is configured to include a return bullet machine for returning the displaced operating member in the operative position to the inoperative position. 3. The clutch device according to claim 2, wherein the rotation angle of the engagement receiver from the non-operating position to the operating position is set so as to exceed the rotation angle forming the concave portion and the convex portion of the second rotating member contact surface. . 4. The clutch device according to claim 2 or 3, wherein the clutch device is provided with a restriction claw for restricting the second rotating body from rotating in the opposite direction when the second rotating body rotates at a predetermined rotation angle. The clutch device according to any one of claims 1 to 4, wherein the clutch device is used in an open / close device for an electric shutter for construction.

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