JPH063221B2 - Compound spring clutch mechanism - Google Patents

Description

The present invention relates to a composite spring clutch mechanism, and more specifically, to selectively transmit the rotation of an input rotary element that is rotationally driven in a predetermined direction to an output rotary element, and to output the output rotary element to a predetermined range. The present invention relates to a compound spring clutch mechanism for selectively rotating in a direction or a direction opposite to the predetermined direction.

2. Description of the Related Art Conventionally, for example, in an electrostatic copying machine, a compound clutch is used as a reversible transmission mechanism for reciprocating an original placing table on which an original to be copied is placed or a part of an optical device for exposing an original to be copied. Mechanism is used. Such a compound clutch mechanism generally includes two electromagnetic clutches. When one electromagnetic clutch is excited, the rotation of the input rotary element is transmitted to the output rotary element, and the output rotary element is rotated in a predetermined direction. When the other electromagnetic clutch is excited, the rotation of the input rotary element is transmitted to the output rotary element, and the output rotary element is rotated in the direction opposite to the predetermined direction.

However, in the above-mentioned known compound clutch mechanism, (a) the compound clutch mechanism itself becomes expensive because it includes two expensive electromagnetic clutches as described above. (B) The electromagnetic clutch electromagnetic means causes Since the rotor is magnetically attracted to transmit the rotational force, the electric force is limited by the magnitude of the electromagnetic force generated by the electromagnetic means, and if the large rotational force is to be transmitted, the electromagnetic clutch, and hence the entire composite clutch, is transmitted. There was a problem that the size would increase.

Therefore, as an example of a conventional technique for solving the above problems, as disclosed in Japanese Patent Laid-Open No. 57-29844, one spring clutch means is interposed in each of the forward rotation series and the reverse rotation series. , A forward / reverse mechanism configured to utilize the frictional action of the friction plate to connect the spring clutch means. According to this forward / reverse rotation mechanism, since it is not necessary to use the electromagnetic clutch, there is an advantage that the structure is simple and the cost is low. However, since it has some other problems, this will be described below together with the specific configuration and operation disclosed in the publication.

(1) A gear meshed with a drive gear is rotatably supported on the shaft to which the forward gear is fixed. A coupling is fitted in the boss portion of this gear. A drum and a spring clutch receiver are further arranged coaxially. The outer diameter of the drum is the same as the outer diameter of the coupling,
It is fixed to the shaft adjacent to the coupling. The spring clutch receiver is rotatable around the shaft. A spring clutch is fitted on the outer diameters of the coupling and the drum, one end of which is connected to the gear and the other end is connected to the spring clutch receiver. A friction plate and a ratchet wheel are rotatably supported by the spring clutch receiver. The ratchet wheel is pressed toward the friction plate by the pressing spring, and the friction plate is pressed against the spring clutch receiver. Ratchet teeth are formed on the outer peripheral portion of the ratchet wheel.

Similar components are mounted on the other shafts arranged in parallel with the shaft, but the returning gear is fixed instead of the forward gear. The backward movement gear is in mesh with the forward movement gear, and the forward movement gear is in mesh with the document placing table drive gear.

A stopper is rotatably supported, one end of which is connected to a solenoid, and the other end of which is pulled by a spring. When the solenoid is released, one claw of the stopper is engaged with the ratchet wheel on the returning gear side to lock its rotation, and the driving force is transmitted to the returning gear. When the solenoid is actuated, the other claw of the stopper is engaged with the ratchet wheel on the forward gear side to lock its rotation, and the driving force is transmitted to the forward gear.

For example, when the rotation of the ratchet wheel on the forward gear side is locked, the friction plate functions and a load due to friction is applied to the rotation of the spring clutch receiver. As a result, the spring clutch is squeezed and the outer diameters of the coupling and the drum are tightened, so that the driving force is transmitted to the drum, the shaft and the forward gear. This spring clutch is required to have an accurate clutch function of transmitting and disconnecting the driving force quickly and reliably. However, as described above, since the frictional force of the friction plate is used to transmit the driving force, the outer diameter of the drum and the inner diameter of the spring clutch (that is, between the outer diameter of the drum and the inner diameter of the spring clutch are It is extremely difficult to properly set the (gap) and the frictional force of the friction plate in good balance, and it is difficult to obtain a desired clutch function.

(2) Since the spring clutch receiver and the friction member are constantly rubbed while the driving force is being transmitted, there is a problem in durability of the friction member and the clutch function may be deteriorated early. Moreover, an extra load is applied to the drive.

(3) A lever is pivotally supported in relation to the stopper and the document placing table. When the document placing table returns to the home position, a cam provided on the document placing table mounting member acts on one end of the lever to push it down, and the other end of the lever activates the stopper by a predetermined amount. As a result, the stopper is positioned at the neutral position in which none of the claws bites the respective ratchet wheels.

That is, since the drive is free only when the document placing table returns to the home position, the document placing table can be manually moved only at the home position, but cannot be moved from other positions. Is. Therefore, when it is desired to manually move the document placing table for maintenance or the like, it is necessary to set the lever to a neutral state by some means (for example, by hand). As a result, maintainability is poor.

(4) When the document placing table returns to the home position, the cam provided on the document placing table mounting member acts on one end of the lever to push it down, and the other end of the lever moves the stopper to drive as described above. Be free. Strictly speaking, the drive becomes free just before the original placing table returns to the home position, and thereafter the original placing table returns to the final home position due to inertia. Since the document table is heavy, the inertial force is sufficient, but in the moving optical system, the weight of the moving body is relatively light, so sufficient inertial force cannot be obtained, and the moving body does not reach the accurate home position. You may not be able to return.

The present invention has been made in view of the above facts, and its main purpose is to provide a composite spring clutch mechanism that has a simple structure, can easily obtain a required clutch function, and is excellent in durability and maintainability. Is to provide.

According to the present invention, it is provided with an input rotary element to which a rotational driving force is transmitted, a forward rotation transmission series and a reverse rotation transmission series, and the forward rotation transmission series is (a) driven and connected to the input rotation element to rotate in a predetermined direction. A first normal rotation transmission rotary element, which is urged and has an output hub portion; (b) a second normal rotation transmission rotation element having an input hub portion and an output hub portion; and (c) an input hub portion. (3) is fitted over the forward rotation transmission rotary element of (3), the output hub portion of the first forward rotation transmission rotation element, and the input hub portion of the second forward rotation transmission rotation element; The first normal rotation transmission rotary element is wound from the input side end to the output side end in a direction in which the first forward rotation transmission rotary element is contracted when rotated in the predetermined direction relative to the second normal rotation transmission rotary element. The first forward rotation coil spring, (e) the output hub of the second forward rotation element, and the third forward rotation element. It is fitted so as to straddle the bare input hub portion, and is fitted to the second forward rotation element.
A second forward rotation coil spring wound from an input side end to an output side end in a direction in which the normal rotation transmission rotation element is contracted when relatively rotated in the predetermined direction; First
First normal rotation transmission control means for selectively preventing contraction of the normal rotation transmission coil spring, and (g) second normal rotation transmission for selectively preventing contraction of the second normal rotation transmission coil spring. Control means, the reverse rotation transmission system is (a) a first reverse rotation transmission rotary element that is drivingly connected to the input rotary element and is rotated in a predetermined direction, and that has an output hub section; and (b) an input. A second reverse rotation transmission rotary element having a hub portion and an output hub portion; (c) a third reverse rotation transmission rotation element having an input hub portion; and (d) an output hub portion of the first reverse rotation transmission rotation element. The second reverse rotation transmission rotary element is fitted over the input hub portion of the second reverse rotation transmission rotation element, and the first reverse rotation transmission rotation element is relatively positioned in the predetermined direction with respect to the second reverse rotation transmission rotation element. A first reverse transmission coil coil wound from the input side end to the output side end in a direction in which it contracts when rotated. And (e) is fitted over the output hub portion of the second reverse rotation transmission rotary element and the input hub portion of the third reverse rotation transmission rotary element, and is attached to the third reverse rotation transmission rotation element. On the other hand, a second reverse rotation transmission coil spring wound from an input side end to an output side end in a direction in which the second reverse rotation transmission rotary element is contracted when relatively rotated in the predetermined direction,
(F) a first reverse rotation transmission control means for selectively blocking the contraction of the first reverse rotation transmission coil spring, and (g) a second reverse rotation transmission control means for selectively blocking the contraction of the second reverse rotation transmission coil spring. Reverse rotation transmission control means, the third forward rotation transmission rotary element of the forward rotation transmission series and the third reverse rotation transmission rotation element of the reverse rotation transmission series are directly drive-coupled, and either Is an output rotary element, and the second normal rotation transmission control means has a control rotation element rotatably fitted to the second normal rotation transmission coil spring, The output side end of the coil spring is connected to the control rotation element, and the second reverse rotation transmission control means has a control rotation element rotatably fitted in the second reverse rotation transmission coil spring. , The output side end of the second reverse rotation transmission coil spring is connected to the control rotation element, The element has an output hub section, and in association with the input rotary element, an interlocking rotary element having the input hub section, and the output hub section of the input rotary element and the input hub section of the interlocking rotary element. Is wound and is wound from the input side end to the output side end in a direction in which the input rotary element is contracted when it is rotated relative to the interlocking rotary element by the rotational driving force transmitted thereto. An interlocking coil spring is provided, and the control rotation element of the second forward rotation transmission control means, the interlocking rotation element, and the control rotation element of the second reverse rotation transmission control means are arranged in this order. A composite spring directly drive-coupled, wherein the control rotation element in each of the second normal rotation transmission control means and the second reverse rotation transmission control means has a larger diameter than the interlocking rotation element. A clutch mechanism is provided.

Hereinafter, preferred specific examples of the composite spring clutch mechanism constructed according to the present invention will be described with reference to the accompanying drawings.

First, referring mainly to FIG. 2 and FIG. 4, a composite spring clutch mechanism, generally designated by reference numeral 2, includes a gear 4, a forward rotation transmission line 6 and a reverse rotation transmission line 8 which constitute an input rotary element. is doing. A first support shaft 18, a second support shaft 20, and a third support shaft 22 are fixed to a support plate 10 such as a support frame of the device by nut members 12, 14 and 16. Then, the first support shaft 18
The gear 4 is rotatably mounted on the second support shaft 2
The forward rotation transmission system 6 is attached to 0, and the reverse rotation transmission system is attached to the third support shaft 22. Although not shown, the gear 4 is drivingly connected to a drive source such as an electric motor through an appropriate transmission system, and is rotationally driven in a predetermined direction (direction shown by an arrow in FIG. 4) by the drive source. It

The normal rotation transmission system 6 includes a gear 24 forming a first normal rotation transmission rotation element, a rotating member 26 forming a second normal rotation transmission rotation element, and a gear 28 forming a third normal rotation transmission rotation element. Contains. The gear 24, the rotating member 26, and the gear 28 move from the base of the second support shaft 20 toward the tip (that is, from left to right in FIG. 2, from left to right in FIG. 4). Sequentially), the second support shaft 20
It is rotatably attached to. The gear 24 is meshed with the gear 4 that constitutes the input rotary element, and is rotated in the direction indicated by the arrow in FIG. A cylindrical output hub portion 24a is formed on the gear 24, and the output hub portion 24a extends from one side surface of the gear 24 toward the rotating member 26.
The rotating member 26 has a cylindrical input hub portion 26a and an output hub portion 26b. The input hub portion 26a of the rotating member 26 has a diameter that is substantially the same as the diameter of the output hub portion 24a formed on the gear 24, and faces the output hub portion 24a of the gear 24 from one side surface of the rotating member 26. Is extended. On the other hand, the output hub portion 26 b of the rotating member 26 extends from the other side surface of the rotating member 26 toward the gear 28. Further, the gear 28 is formed with a cylindrical input hub portion 28a. The input hub portion 28a of the gear 28 has the rotating member 26
It has a diameter substantially the same as the diameter of the output hub portion 26b formed in, and extends from one side surface of the gear 28 toward the output hub portion 26b of the rotating member 26. The output hub portion 24a of the gear 24 that constitutes the first forward rotation transmission rotary element and the input hub portion 26a of the rotary member 26 that constitutes the second forward rotation transmission rotation element have a first portion extending across them. The coil spring 30 constituting the normal rotation transmission coil spring of 1 is fitted,
In the coil spring 30, a claw wheel 32, which constitutes a control rotation element of the first forward rotation transmission control means, is formed so that a plurality of claws 32a are formed on the entire outer peripheral side surface thereof at intervals so as to be rotatable. It is inlaid. The coil spring 30 has its input end 3
0a to the output side end 30b are wound in the right-hand direction (thus, in the direction in which they contract when the gear 24 rotates in the direction shown by the arrow) when viewed from the lower right in FIG. It is fixed to the ratchet wheel 32 by being inserted into the notch 32b formed in the ratchet wheel 32. Also,
The output hub portion 26b of the rotating member 26 that constitutes the second forward rotation transmitting rotary element and the input hub portion 28a of the gear 28 that constitutes the third forward rotation transmitting rotary element straddle the second hub portion 26b and the second hub portion 28a. A coil spring 34 that constitutes a forward rotation transmission coil spring is fitted, and a gear 36 that constitutes a control rotation element of the second forward rotation transmission control means is rotatably fitted onto the coil spring 34. . The coil spring 34 has its input end 3
4a to the output side end 34b are wound in a right-handed manner when viewed from the lower right side in FIG. The output side end 34b is fixed to the gear 36 by being inserted into a notch 36a formed in the gear 36.

The above-described first normal rotation transmission control means further includes the ratchet wheel 3 described above.
It includes rotation control means for selectively blocking rotation of the two. As shown in FIG. 3, the illustrated rotation control means includes a locking member 38 swingably mounted on the support plate 10 (FIG. 1) and an electromagnetic solenoid 40 (operating means fixed to the support plate 10). Configure). A locking piece 38a capable of engaging with the claw 32a formed on the ratchet wheel 32 is provided at one end of the locking member 38, and the other end thereof is rotatably connected to the output shaft 42 of the electromagnetic solenoid 40. ing. A compression coil spring 46 is interposed between the other end of the locking member 38 and the solenoid body 44 of the electromagnetic solenoid 40. Therefore, when the electromagnetic solenoid 40 is biased, the locking member 38 is pivoted clockwise in FIG. 3 against the elastic biasing action of the compression coil spring 46, and the locking piece 38a of the locking member 38 is moved to the above-mentioned position. The ratchet wheel 32 is positioned at a non-acting position where it disengages from the claw 32a (thus, when the latch member 38 is positioned at the non-acting position, the ratchet wheel 32 becomes rotatable), and the electromagnetic solenoid 40 is deenergized. The elastic biasing action of the compression coil spring 46 causes the locking member 38 to pivot counterclockwise in FIG. 3 so that the locking piece 38a of the locking member 38 is locked to one of the claws 32a of the ratchet wheel 32. To the working position (the position shown in FIG. 3) (therefore, when the locking member 38 is located in such working position, the rotation of the ratchet wheel 32 is prevented).

As described above with reference to FIGS. 2 and 4, in the forward rotation transmission system 6 as described above, the electromagnetic solenoid 40 (FIG. 3) of the first forward rotation transmission control means is energized. As described above, the ratchet wheel 32 becomes rotatable, and the coil spring 30 is contracted by the rotation of the gear 24 which is rotated in the direction indicated by the arrow, and the output hub portion 24a and the rotating member 26 formed on the gear 24 via the coil spring 30. Is connected to the input hub portion 26a formed in the above, and thus the rotational driving force of the gear 24 is transmitted to the rotating member 26 via the coil spring 30, and the rotating member 26 is rotated in the direction indicated by the arrow (this At this time, since the coil spring 30 is rotated integrally with the gear 24 and the rotating member 26, the ratchet wheel 3 connected to the coil spring 30 is provided.
2 is also rotated together with the coil spring 30 in the direction shown by the arrow in FIG. When the rotating member 26 is rotated in the direction shown by the arrow, the rotation of the rotating member 26 causes the coil spring 34 to rotate.
Is contracted, and the rotary member 26 is
The output hub portion 26b formed on the shaft and the input hub portion 28a formed on the gear 28 are connected to each other, and thus the rotating member 26 is formed.
Is transmitted to the gear 28 via the coil spring 34, and the gear 28 is rotated in the direction shown by the arrow 48 in FIG. 4 (at this time, the coil spring 34 is separated from the rotating member 26 and the gear 28). Since they rotate together, the gear 36 connected to the coil spring 34 is also rotated together with the coil spring 34 in the direction shown by the arrow in FIG.

On the other hand, when the electromagnetic solenoid 40 of the first forward rotation transmission control means is deenergized, the rotation of the ratchet wheel 32 is blocked as described above,
The contraction of the coil spring 30 is prevented, and the coil spring 30
Is expanded. When expanded in this way, the output hub portion 24a formed on the gear 24 and the input hub portion 26a formed on the rotating member 26 are disconnected from each other by the coil spring 30, and the gear 24 and the rotating member 26 are connected. The state is released,
Thus, the rotating member 26 and the gear 28, the coil spring 34, and the gear 36 rotated by the rotating member 26 are not rotated by the gear 24.

The reverse rotation transmission series 8 includes a gear 50 forming a first reverse rotation transmission rotary element, a rotating member 52 forming a second reverse rotation transmission rotation element, and a gear 54 forming a third reverse rotation transmission rotation element. I'm out. These gear 50, rotating member 5
2 and the gear 54 from the base of the third support shaft 22 toward the tip (that is, from left to right in FIG.
In the figure, from the upper left to the lower right)
Is rotatably mounted on the support shaft 22 of the. Gear 50
Is meshed with the gear 4 that constitutes the input rotary element,
It is rotated in the direction shown by the arrow in FIG. A cylindrical output hub 50a is formed on the gear 50, and the output hub 50a extends from one side surface of the gear 50 toward the rotating member 52. The rotating member 52 has a cylindrical input hub portion 52a and an output hub portion 52b. The input hub portion 52a of the rotating member 52 has a diameter that is substantially the same as the diameter of the output hub portion 50a formed on the gear 50, and faces the output hub portion 50a of the gear 50 from one side surface of the rotating member 52. Is extended. On the other hand, the output hub portion 52b of the rotating member 52 extends from the other side surface of the rotating member 52 toward the gear 54. A cylindrical input hub portion 54a is formed on the gear 54. Input hub 54a of gear 54
Has a diameter substantially the same as the diameter of the output hub portion 52b formed on the rotating member 52, and extends from one side surface of the gear 54 toward the output hub portion 52b of the rotating member 52. The gear 54 having the input hub portion 54a is meshed with the gear 28 of the normal rotation transmission system 6 as shown in FIG. Gear 5 constituting the first reverse rotation transmission rotation element
The output hub portion 50a of 0 and the input hub portion 52a of the rotating member 52 constituting the second reverse rotation transmission rotary element are covered with the coil spring 56 constituting the first reverse rotation transmission coil spring. The coil spring 56, which is fitted, further constitutes a control rotation element of the first reverse rotation transmission control means.
A pawl wheel 58 having a plurality of pawls 58a formed at intervals along the entire outer peripheral side surface is rotatably fitted. The coil spring 56 turns from the input side end 56a to the output side end 56b in a right-handed direction when viewed from the lower right side in FIG.
It is wound, and its input side end 56a is inserted into a notch 58b formed in the ratchet wheel 58, whereby
It is fixed to. In addition, the output hub portion 52b of the rotating member 52 that constitutes the second reverse rotation transmission rotation element and the input hub portion 54a of the gear 54 that constitutes the third reverse rotation transmission rotation element are provided with a second A coil spring 60 that constitutes a reverse rotation transmission coil spring is fitted, and the coil spring 6
Further, a gear 62, which constitutes a control rotation element of the second reverse rotation transmission control means, is rotatably fitted in the position 0. The coil spring 60 is wound clockwise from the input side end 60a to the output side end 60b when viewed from the lower right side in FIG. ) It is wound, and its output side end 60b is fixed to the gear 62 by being inserted into the notch 62a formed in the gear 62.

The above-described first reverse rotation transmission control means further includes the ratchet wheel 5 described above.
It includes rotation control means for selectively blocking rotation of eight. As shown in FIG. 3, the illustrated rotation control means includes a locking member 64 swingably mounted on the support plate 10 (FIG. 1) and an electromagnetic solenoid 66 fixed to the support plate 10 (operating means Configure). A locking piece 64a capable of engaging with a claw 58a formed on the claw wheel 58 is provided at one end of the locking member 64, and the other end thereof is pivotally connected to an output shaft 68 of an electromagnetic solenoid 66. ing. A compression coil spring 72 is interposed between the other end of the locking member 64 and the solenoid body 70 of the electromagnetic solenoid 66. Therefore, when the electromagnetic solenoid 66 is biased, the locking member 64 is rotated clockwise in FIG. 3 against the elastic biasing action of the compression coil spring 72, and the locking piece 64a of the locking member 64 is moved to the above-mentioned position. When the ratchet wheel 58 is positioned in a non-acting position where it disengages from the ratchet wheel 58 (therefore, when the locking member 64 is positioned in the non-acting position, the ratchet wheel 58 becomes rotatable), and the electromagnetic solenoid 66 is deenergized. , The locking member 64 by the elastic biasing action of the compression coil spring 72.
Is rotated counterclockwise in FIG.
The locking piece 64a is positioned at an operating position (the position shown in FIG. 3) for locking any one of the claws 58a of the ratchet wheel 58 (therefore, when the locking member 64 is positioned at such an operating position, the claw 58a) The rotation of the car 58 is blocked).

In the reverse rotation transmission system 8 as described above, as understood from FIGS. 2 and 4, when the electromagnetic solenoid 66 (FIG. 3) of the first reverse rotation transmission control means is energized, the pawl is moved as described above. The wheel 58 becomes rotatable, and the coil spring 56 is contracted by the rotation of the gear 50 that is rotated in the direction indicated by the arrow, and the output hub portion 50a formed on the gear 50 and the rotating member 52 are formed via the coil spring 56. Is connected to the input hub portion 52a, and thus the rotational driving force of the gear 50 is transmitted to the rotating member 52 via the coil spring 56, so that the rotating member 52 is rotated in the direction indicated by the arrow (at this time, Since the coil spring 56 is rotated integrally with the gear 50 and the rotating member 52, the ratchet wheel 58 connected to the coil spring 56 is also rotated together with the coil spring 56 in the direction shown by the arrow in FIG. When the rotating member 52 is rotated in the direction indicated by the arrow, the coil spring 60 contracts due to the rotation of the rotating member 52, and the output hub 52b and the gear 54 formed on the rotating member 52 are connected via the coil spring 60. The formed input hub portion 54a is connected, and thus the rotational driving force of the rotating member 52 is transmitted to the gear 54 via the coil spring 60, and the gear 54 is rotated in the direction indicated by the arrow 74 in FIG. 4 ( At this time, the coil spring 60 is attached to the rotating member 5
2 and the gear 54 rotate integrally, so that the coil spring 60
The gear 62, which is connected to the
It is rotated in the direction indicated by the arrow in the figure).

On the other hand, when the electromagnetic solenoid 66 of the first reverse rotation transmission control means is deenergized, the rotation of the ratchet wheel 68 is blocked as described above,
The contraction of the coil spring 56 is prevented, and the coil spring 56
Is expanded. When expanded in this way, the output hub portion 50a formed on the gear 50 and the input hub portion 52a formed on the rotating member 52 are disconnected from each other by the coil spring 56, and the gear 50 and the rotating member 52 are connected. The state is released,
Thus, the rotating member 52 and the gear 54, the coil spring 60 and the gear 62 rotated by the rotating member 52 are not rotated by the gear 50.

A gear 76, which constitutes an interlocking rotary element, is rotatably mounted on the tip end of the first support shaft 18 on which the gear 4 which constitutes the input rotary element is rotatably mounted. This gear 76 has a smaller number of teeth than the number of teeth of the gear 36 forming the control rotation element of the second forward rotation transmission control means and the gear 62 forming the control rotation element of the second reverse rotation transmission control means (in other words, in other words). , Smaller than the diameters of the gears 36 and 62). The gear 76 has a cylindrical input hub portion 76.
a is formed, and the input hub portion 76a has a gear 7
The gear 4 extends from one side of the gear 6. The gear 4 is also formed with a cylindrical output hub portion 4a. The output hub portion 4a has a diameter substantially the same as the diameter of the output hub portion 76a formed on the gear 76, and extends from one side surface of the gear 4 toward the input hub portion 76a of the gear 76. A coil spring 78, which constitutes an interlocking coil spring, is fitted over the output hub portion 4a of the gear 4 and the input hub portion 76a of the gear 76. The coil spring 78 is wound from the input side end 78a to the output side end 78b in a left-handed winding when viewed from the lower right in FIG. 4 (thus, in a direction in which the gear 4 is contracted when the gear 4 rotates in the direction shown by the arrow). .

Therefore, when the gear 4 is rotated by the drive source (not shown), the coil spring 78 contracts due to the rotation of the gear 4 which rotates in the direction indicated by the arrow, and the coil spring 78 is formed through the coil spring 78. The output hub portion 4a and the input hub portion 76a formed on the gear 76 are connected, and thus the rotational driving force of the gear 4 is transmitted to the gear 76 via the coil spring 78, and the gear 76 is indicated by an arrow in FIG. It is rotated in the direction shown.

The gear 76 that constitutes the interlocking rotary element rotated as described above includes the gear 36 that constitutes the control rotary element of the second forward rotation transmission control means in the forward rotation transmission series 6 and the second gear in the reverse rotation transmission series 8. It is meshed with a gear 62 that constitutes a controlled rotation element of the reverse rotation transmission control means. Further, in the illustrated specific example, as shown in FIG. 1 and FIG.
A gear 80 that takes out the output from the composite spring clutch mechanism 2 to the gear 28 that constitutes the third normal rotation transmission rotary element.
Are meshed with each other (therefore, in this case, the gear 28 constitutes an output rotary element). Instead of the gear 28 constituting the third normal rotation transmission rotary element of the normal rotation transmission series 6,
It is also possible to mesh the gear 80 for taking out the output with the gear 54 which constitutes the third reverse transmission rotary element of the reverse transmission series 8 (thus, in this case, the tooth 54 constitutes the output rotary element).

In the composite spring clutch mechanism 2 having the above-described configuration, the gear 24 (first normal rotation transmission rotary element), the gear 28
(Third forward rotation transmission rotation element), gear 50 (first reverse rotation transmission rotation element) and gear 54 (third reverse rotation transmission rotation element)
By appropriately selecting the number of teeth of each of the above, it is possible to arbitrarily set the rotation speed during forward rotation and the rotation speed during reverse rotation of the gear 28 that constitutes the output rotation element.

Next, mainly referring to FIGS. 2 and 4, the operation and effect of the compound spring clutch mechanism 2 as described above will be described.

(1) Neutral (state in which the rotational force of the input rotary element is not transmitted to the output rotary element) At neutral, the electromagnetic solenoid 40 (Fig. 3) and the first reverse reverse transmission in the rotation control means of the first forward rotation transmission control means. Electromagnetic solenoid 66 in the rotation control means of the control means
(FIG. 3) is deenergized, and as described above, the locking piece 38a of the locking member 38 in the normal rotation transmission system 6 is one of the plurality of claws 32a formed in the claw wheel 32. And the rotation of the ratchet wheel 32 is prevented, and the locking piece 64a of the locking member 64 in the reverse rotation transmission system 8 is locked to any one of the plurality of pawls 58a formed on the ratchet wheel 58. Therefore, the rotation of the ratchet wheel 58 is prevented. Therefore, the gear 4 which is rotationally driven in the direction indicated by the arrow by a drive source (not shown)
The rotational force of the (input rotary element) is the gear 24 of the forward rotation transmission series 6.
Is transmitted to the gear 24 to rotate in the direction indicated by the arrow, but because the rotation of the ratchet wheel 32 is blocked, the coil spring 3
0 (first forward rotation transmission coil spring) is not contracted, and the output hub portion 24a of the gear 24 and the input hub portion 26a of the rotating member 26 are not connected via the coil spring 30 as described above. . Further, the rotational force of the gear 4 (rotation input element) that is rotationally driven in the direction indicated by the arrow is transmitted to the gear 50 of the reverse rotation transmission series 8 and the gear 50 is rotated in the direction indicated by the arrow, but Since the rotation is blocked, the coil spring 50 (first reverse transmission coil spring) is not contracted,
As described above, the output hub portion 50a of the gear 50 and the rotating member 5
The second input hub portion 52a is never connected. Thus, in the forward rotation transmission system 6, the gear 24 and the rotating member 26 are
Is decoupled, and the gear 50 and the rotating member 52 are decoupled in the reverse rotation transmission series 8, and the gear 2
8 (which constitutes the output rotary element together with the third forward rotation rotary element) is not rotated. At this time, the coil spring 78 (interlocking coil spring) is contracted by the rotation of the gear 4 (input rotating element) rotated in the direction shown by the arrow, and the gear 76 (interlocking rotating element) is rotated by the arrow as described above. The gear 36 is rotated in the direction shown, and the gear 36 (control rotation element of the second normal rotation transmission control means) and the gear 62 are rotated with the rotation of the gear 76.
(Control rotation elements of the second reverse rotation transmission control means) are rotated in the directions indicated by the arrows. When the gear 36 is rotated, the coil spring 34 (second forward rotation transmission coil spring) is integrally rotated with the gear 36 because the output side end 34b thereof is connected to the gear 36. Since the coil spring 34 is expanded by the rotation, the rotational force of the gear 36 transmitted to the gear 36 via the gear 4 and the gear 76 is not transmitted to the rotating member 26 and the gear 28. Further, when the gear 62 is rotated, the coil spring 60 (second reverse rotation transmission coil spring) is integrally rotated with the gear 62 because the output side end 60b thereof is connected to the gear 62. The rotation of the coil spring 60 expands the coil spring 60, so that the rotational force of the gear 62 transmitted to the gear 62 via the gear 4 and the gear 76 is not transmitted to the rotating member 52 and the gear 54.

(2) Neutral to forward rotation To switch from neutral to forward rotation, the electromagnetic solenoid 40 (Fig. 3) of the rotation control means of the first forward rotation transmission control means is energized. When the solenoid 40 is energized, it is rotated by a drive source (not shown) in the direction indicated by the arrow 4
The coil spring 30 (first forward rotation transmission coil spring) is contracted by the rotation of the gear 24 (first forward rotation transmission rotation element) that is rotated in the direction indicated by the arrow via the (input rotation element). Thus, the output hub portion 24a of the gear 24 and the input hub portion 26a of the rotating member 26 are connected to the coil spring 30.
And the rotary member 26 is rotated in the direction indicated by the arrow (at this time, the coil spring 30 and the ratchet wheel 32).
Is also rotated as described above). When the rotary member 26 is thus rotated, the rotation causes the coil spring 34 (second forward rotation transmission coil spring) to contract, and as described above, the output hub portion 26b of the rotary member 26 and the input hub portion of the gear 28. 28
a is connected to the coil spring 34 and the coil spring 3
The gear 36 (control rotation element of the second normal rotation transmission control means) connected to the No. 4 is rotated by the turning force from the rotation member 26 in the direction indicated by the arrow. On the other hand, at this time, the coil spring 78 (interlocking coil spring) is contracted by the rotational force of the gear 4 (input rotary element), and the gear 76 (interlocking rotary element) is rotated in the direction indicated by the arrow as described above. 76
The rotating force of the above causes the gear 36 and the coil spring 34 to rotate in the direction indicated by the arrow. Therefore, as a result of the above, the number of teeth of the gear 36 is set larger than the number of teeth of the gear 76, and the rotation speed of the gear 36 rotated by the rotating force from the rotating member 26 is rotated by the rotating force from the gear 76. The rotation speed of the gear 36 is higher than that of the gear 36 (in the specific example, the numbers of teeth of the gears 4 and 24 are also set to be the same). Therefore, the turning force from the rotating member 26 causes the coil spring 3 to rotate.
4 and the gear 36 are rotated, and by the rotation of the gear 36, the gear 76 is rotated in the direction indicated by the arrow (as understood from the above description, the gear 76 is rotated by the rotating force from the gear 4). The rotation speed of the gear 36 is higher than that of the gear 36. The rotation of the gear 76 expands the coil spring 78 to expand the output hub portion 4a of the gear 4 and the input hub portion 76a of the gear 76. The connection state with is released. Thus, the electromagnetic solenoid 4
When 0 is biased, the gear 4 is rotated in the direction shown by the arrow.
The rotational force of the gear 2 is transmitted through the gear 24, the coil spring 30, the rotating member 26 and the coil spring 34 in the forward rotation transmission system 6 to the gear 2
8 (which constitutes the output rotary element together with the third forward rotation rotary element), and the gear 28 is rotated in the direction indicated by the arrow 48. When the gear 28 is thus rotated, the gear 80 meshed with the gear 28 is rotated in the same direction as the rotation direction of the gear 4 indicated by the arrow, and thus is normally rotated. At this time, the gear 54 of the reverse transmission series 8 is rotated in the direction shown by the arrow 82 as the gear 28 of the normal rotation transmission series 6 rotates in the direction shown by the arrow 48. In the direction indicated by the arrow (specifically, the rotation by the rotational force from the gear 36 of the forward rotation transmission series 6) causes the gear 62 (second gear) to rotate.
Of the reverse rotation transmission control means) is rotated in the direction shown by the arrow to expand the coil spring 60 (second reverse rotation transmission coil spring). It is not transmitted to the rotating member 52 (at this time, since the electromagnetic solenoid 66 of the rotation control means of the first reverse rotation transmission control means is deenergized, as described above, it is not connected to the gear 50 of the reverse rotation transmission series 8. The connection state with the rotating member 52 is released, and therefore, the turning force is not transmitted to the rotating member 52 in the direction of the gear 50 indicated by the arrow).

(3) To switch from neutral to reverse rotation, the electromagnetic solenoid 66 (FIG. 3) of the rotation control means of the first reverse rotation transmission control means is energized. When the electromagnetic solenoid 66 is energized, the gear 4 is driven to rotate in a direction indicated by an arrow by a drive source (not shown).
The coil spring 56 (first reverse rotation transmission coil spring) is contracted by the rotation of the gear 50 (first reverse rotation transmission rotation element) that is rotated in the direction indicated by the arrow via the (input rotation element). The output hub portion 50a of the lever gear 50 and the input hub portion 52a of the rotating member 52 are formed by the coil spring 56.
And the rotating member 52 is rotated in the direction indicated by the arrow (at this time, the coil spring 56 and the ratchet wheel 5).
8 is also rotated as described above). When the rotating member 52 is thus rotated, the rotation causes the coil spring 60 (second reverse rotation transmission coil spring) to contract, and as described above, the output hub portion 52b of the rotating member 52 and the input hub portion 54a of the gear 54. The coil spring 60 and the gear 62 (the control rotation element of the second reverse rotation transmission control means) connected to the coil spring 60 are rotated by the rotating force from the rotating member 52 in the direction indicated by the arrow. On the other hand, at this time, the gear 4
The coil spring 78 (interlocking coil spring) is contracted by the rotating force of the (input rotary element), and the gear 76 is moved as described above.
The (interlocking rotary element) is rotated in the direction indicated by the arrow, and the rotating force of the gear 76 causes the gear 62 and the coil spring 6 to rotate.
0 is rotated in the direction indicated by the arrow. Therefore, as a result of the above, the number of teeth of the gear 62 is set to be larger than the number of teeth of the gear 76, and the rotation speed of the gear 62 rotated by the rotating force from the rotating member 52 is rotated by the rotating force from the gear 76. The rotation speed of the gear 62 is higher than that of the gear 62 (in the specific example, the numbers of teeth of the gears 4 and 24 are set to be the same), and hence the coil springs 60 and 62 are rotated by the turning force from the rotating member 52. The rotation of the gear 62 causes the gear 76 to rotate in the direction indicated by the arrow, and (as will be understood from the above description, the gear 76 rotates from the gear 62 faster than the rotation speed rotated by the turning force from the gear 4). It is rotated at a rotational speed that is rotated by a turning force),
The rotation of the gear 76 expands the coil spring 78 to output the output hub portion 4a of the gear 4 and the input hub portion 76 of the gear 76.
The connection state with a is released. Thus, when the electromagnetic solenoid 66 is energized, the rotational force of the gear 4 rotated in the direction indicated by the arrow is transmitted through the gear 50, the coil spring 56, the rotating member 52 and the coil spring 60 in the reverse rotation transmission series 8 to the gear 54. The gear 54 is rotated in the direction indicated by the arrow 74 by being transmitted to the (third reverse rotation transmission rotation element). When the gear 54 is thus rotated, the gear 28 of the forward rotation transmission series 6 (which constitutes the output rotation element together with the third forward rotation transmission rotation element) is rotated in the direction indicated by the arrow 84 in FIG. The gear 80 meshed with the gear 28 is rotated in the direction opposite to the rotation direction of the gear 4 indicated by the arrow, and is thus reversed. At this time, the gear 28 of the forward rotation transmission system 6 is rotated in the direction shown by the arrow 84 as described above,
6 (interlocking rotary element) rotates in a direction indicated by an arrow (specifically, rotation by rotational force from the gear 62 of the reverse rotation transmission series 8), and the gear 36 (control rotary element of the second forward rotation transmission control means). Is rotated in the direction shown by the arrow and the coil spring 3
4 (second forward rotation transmission coil spring) is expanded, the rotational force of the gear 28 and the rotational force of the gear 36 are not transmitted to the rotating member 26 (at this time, the first forward transmission coil spring). Since the electromagnetic solenoid 40 of the rotation control means of the control means is deenergized, as described above, the connection state between the gear 24 of the normal rotation transmission series 6 and the rotating member 26 is released,
Therefore, the turning force of the gear 24 in the direction indicated by the arrow is not transmitted to the rotating member 26).

(4) Forward rotation to reverse rotation (or reverse rotation to forward rotation) To switch from normal rotation (or reverse rotation) to reverse rotation (or normal rotation), energize (or deactivate) during normal rotation (or reverse rotation). While deactivating (or energizing) the electromagnetic solenoid 40 (FIG. 3) of the rotation control means of the first forward rotation transmission control means,
The electromagnetic solenoid 66 (FIG. 3) of the rotation control means of the first reverse rotation transmission control means that is deenergized (or energized) during normal rotation (or reverse rotation) is energized (or deenergized). Thus, as can be understood from the above description, the forward rotation transmission series 6
(Or reverse transmission system 8) becomes the disconnection state,
The reverse rotation transmission line 8 (or the forward rotation transmission line 6) is in a continuous state, and thus the gear 80 is normally rotated (or reversely rotated). still,
The operation at the time of switching is easily understood based on the description of (2) "neutral to forward rotation" and (3) "neutral to reverse rotation", and therefore description thereof will be omitted.

The composite spring clutch mechanism having the above-described configuration can be suitably used as a reversible transmission mechanism for reciprocating a document placing table or a part of an optical device in an electrostatic copying machine, for example.

The composite spring clutch mechanism constructed according to the present invention has been described above, but the present invention is not limited to such specific examples, and various modifications and corrections can be made without departing from the scope of the present invention.

For example, although gears are used as transmission rotary elements in the specific example, it is possible to use a sprocket, for example, instead of the gears, and transmit the turning force by combining the sprocket and the chain.

Further, in the specific example, both gears are used as the control rotation element of the second forward rotation transmission control means and the control rotation element of the second reverse rotation transmission control means, but a pawl is formed instead of this gear. It is also possible to use a nail wheel. In such a case, the rotation of the ratchet wheel may be controlled by a control means including, for example, an electromagnetic solenoid and a locking member having a locking piece that is locked to the claw of the ratchet wheel. The rotating element can be omitted.

The composite spring clutch mechanism improved in accordance with the present invention comprises a forward rotation transmission series 6 and a reverse rotation transmission series 8, each of which is provided with two sets of transmission coil springs. That is, the first forward rotation transmission coil spring 30 and the second forward rotation transmission coil spring 34 are provided in the forward rotation transmission series 6, and the first reverse rotation transmission coil spring 56 and the second reverse rotation are provided in the reverse rotation transmission series 8. Transmission coil springs 60 are provided respectively. Control means are provided for the coil springs to selectively prevent the coil springs from contracting.

When transmitting the driving force to the normal rotation transmission system 6, the first normal rotation transmission coil spring 30 and the normal rotation transmission coil spring 34 are
It is contracted by those control means. At this time, contraction of the second reverse rotation transmission coil spring 60 of the reverse rotation transmission series 8 is prevented by the control means, so that the driving force transmitted to the reverse rotation transmission series 8 is blocked by the second reverse rotation transmission coil spring 60. To be done.

On the other hand, when the driving force is transmitted to the reverse rotation transmission system 8,
The reverse rotation transmission coil spring 56 and the second reverse rotation transmission coil spring 60 are contracted by their control means. At this time, the second forward rotation transmission coil spring 34 of the forward rotation transmission series 6 is
Since the contraction is blocked by the control means, the driving force transmitted to the normal rotation transmission line 6 is blocked by the second normal rotation transmission coil spring 34.

As is clear from the above description, the second normal rotation transmission coil spring 34 and the second reverse rotation transmission coil spring, which are the second transmission coil springs provided in the normal rotation transmission series 6 and the reverse rotation transmission series 8, respectively. 60, when one of the transmission lines is in a driving state, shuts off the driving of the other transmission line,
When the other transmission system is in a driving state, it has a function of cutting off the drive of one transmission system. At the time of neutrality, the transmission coil springs 34 and 60 are prevented from contracting by the control means and their drive is shut off.

In the specific example, the gears 36, 62 and 76 (the interlocking coil spring 78 in relation to the gear 76) are used as the control means of the second forward rotation transmission coil spring 34 and the second reverse rotation transmission coil spring 60. . Similar to the above, the function of these configurations is to block (specifically expand) the contraction of the second transmission coil spring of the other transmission series that is not in the drive state, and to interrupt the drive. At neutral, gear 7
Since the gears 36 and 62 are rotated by 6, the transmission coil springs 34 and 60 are expanded and the drive is shut off.
As described above, if the gears 36 and 62 are constituted by a ratchet wheel and the rotation thereof is controlled by a solenoid as shown in FIG. 3, the gear 76 and the interlocking coil spring 7 can be controlled.
No. 8 (fifth coil spring for the entire mechanism) is unnecessary. Therefore, in the present invention, the forward / reverse rotation mechanism is obtained by using at least four transmission coil springs as a whole.

According to the composite spring clutch mechanism of the present invention, the following effects can be obtained.

(1) The required clutch function can be easily obtained with a simple structure. Ie at least 4 as a whole
By using two transmission coil springs, a forward / reverse rotation mechanism can be obtained, and it is not necessary to use a friction plate as in the conventional case. As a result, the drive can be transmitted by tightening the transmission coil spring to the hub without considering the frictional force, so the outer diameter of the hub and the inner diameter of the transmission coil spring can be set relatively rough. However, a quick and reliable clutch function is sufficiently guaranteed. Therefore, the required clutch function can be obtained while the design is easier than the conventional forward / reverse rotation mechanism using a friction plate. Further, in connection with the use of four transmission coil springs, the parts can be made common, the configuration is simplified, and the cost is reduced.

(2) The conventional friction plate is unnecessary. As a result, the durability is superior to the forward / reverse rotation mechanism using the friction plate, and the required clutch function is guaranteed for a long period of time. In addition, no extra load is applied to drive.

(3) The drive-free neutral state can be obtained regardless of the position of the document placing table. That is, the first and second forward rotation transmission control means and the first and second reverse rotation transmission control means may be operated so as to prevent the coil springs from contracting. As a result, the maintainability is remarkably improved as compared with the conventional forward / reverse rotation mechanism which is limited to the home position of the document table.

(4) The drive-free neutral state can be obtained without mechanically associating with the position of the moving body such as the document placing table as in the conventional forward / reverse rotation mechanism. As a result, the movable body can be reliably returned to the final position, that is, the accurate home position, regardless of whether the original placing table is movable or the optical system is movable.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a connected state of transmission rotary elements in a composite spring clutch mechanism configured according to the present invention. FIG. 2 is a sectional view taken along the line II-II in FIG. FIG. 3 is a first view of the composite spring clutch mechanism of FIG.
The figure which shows the normal rotation transmission control means and 2nd reverse rotation transmission control means of FIG. FIG. 4 is an exploded perspective view showing an exploded state of the composite spring clutch mechanism of FIG. 2 ・ ・ Composite spring clutch mechanism 4 ・ ・ Gear (input rotation element) 6 ・ ・ Forward rotation transmission series 8 ・ ・ Reverse rotation transmission series 24 ・ ・ Gear (first forward rotation transmission rotation element) 26 ・ ・ Rotation member (No. 2 forward rotation transmission rotary element) 28 ... gear (third forward rotation transmission rotation element) 30 ... coil spring (first forward rotation transmission coil spring) 34 ... coil spring (second forward transmission coil) Spring 50 .. Gear wheel (first reverse rotation transmission rotation element) 52. Rotating member (second reverse rotation transmission rotation element) 54. Gear (third reverse rotation transmission rotation element) 56 .. Coil spring (first) Reverse rotation transmission coil spring) 60 .. coil spring (second reverse rotation transmission coil spring) 76 .. gear (interlocking gear) 78 .. coil spring (interlocking coil spring)

Claims (5)

[Claims] 1. An input rotary element for transmitting a rotational driving force, a forward rotation transmission series and a reverse rotation transmission series, wherein the forward rotation transmission series is (a) driven and connected to the input rotation element to rotate in a predetermined direction. A first normal rotation transmission rotary element having an output bubbling portion, (b) a second normal rotation transmission rotation element having an input hub portion and an output hub portion, and (c) a third rotation portion having an input hub portion.
And (d) is fitted over the output hub portion of the first normal rotation transmission rotation element and the input hub portion of the second normal rotation transmission rotation element, and The first forward rotation transmitting rotary element is wound from the input side end to the output side end in a direction in which the first forward rotation transmitting rotary element is contracted when rotated in the predetermined direction relative to the second forward rotation transmitting rotary element. A first forward rotation transmission coil spring, (e) is fitted across the output hub portion of the second forward rotation transmission rotary element and the input hub portion of the third forward rotation transmission rotation element, Further, when the second normal rotation transmission rotary element is rotated in the predetermined direction relative to the third normal rotation transmission rotation element, it is wound from the input side end to the output side end in a contracting direction. A second forward rotation transmission coil spring, and (f) first forward rotation transmission control means for selectively preventing contraction of the first forward rotation transmission coil spring, ) Second forward rotation transmission control means for selectively preventing contraction of the second forward rotation coil spring, the reverse transmission series being (a) drivingly connected to the input rotary element and having a predetermined direction. A first reverse rotation transmission rotary element having an output hub portion, (b) a second reverse rotation transmission rotation element having an input hub portion and an output hub portion, and (c) an input hub portion. And a second reverse rotation transmission rotary element, and (d) is fitted across the output hub portion of the first reverse rotation transmission rotation element and the input hub portion of the second reverse rotation transmission rotation element, and The first reverse rotation is wound from the input side end to the output side end in a direction in which the first reverse rotation transmission rotary element is contracted when rotated in the predetermined direction with respect to the reverse rotation transmission rotary element. A transmission coil spring, and (e) an output hub portion of the second reverse rotation transmission rotary element and a third reverse rotation transmission rotary element. In a direction in which the second reverse rotation transmission rotary element is fitted over the force hub portion and contracts when the second reverse rotation transmission rotary element is relatively rotated in the predetermined direction with respect to the third reverse rotation transmission rotary element. A second reverse rotation transmission coil spring wound from the input end to the output end,
(F) a first reverse rotation transmission control means for selectively blocking the contraction of the first reverse rotation transmission coil spring, and (g) a second reverse rotation transmission control means for selectively blocking the contraction of the second reverse rotation transmission coil spring. Reverse rotation transmission control means, the third forward rotation transmission rotary element of the forward rotation transmission series and the third reverse rotation transmission rotation element of the reverse rotation transmission series are directly drive-coupled, and either Constitutes an output rotation element, and the second forward rotation transmission control means has a control rotation element rotatably fitted in the second forward rotation transmission coil spring, and the second forward rotation transmission is provided. The output side end of the coil spring is connected to the control rotation element, and the second reverse rotation transmission control means has a control rotation element rotatably fitted in the second reverse rotation transmission coil spring. , The output side end of the second reverse rotation transmission coil spring is connected to the control rotation element, The element has an output hub section, and in association with the input rotary element, an interlocking rotary element having the input hub section, and the output hub section of the input rotary element and the input hub section of the interlocking rotary element. Is wound and is wound from the input side end to the output side end in a direction in which the input rotary element is contracted when it is rotated relative to the interlocking rotary element by the rotational driving force transmitted thereto. An interlocking coil spring is provided, and the control rotation element of the second forward rotation transmission control means, the interlocking rotation element, and the control rotation element of the second reverse rotation transmission control means are arranged in this order. A composite spring directly drive-coupled, wherein the control rotation element in each of the second normal rotation transmission control means and the second reverse rotation transmission control means has a larger diameter than the interlocking rotation element. Clutch mechanism. 2. The control rotation of the input rotation element, the first forward rotation transmission rotation element, the third forward rotation transmission rotation element, and the second forward rotation transmission control means in the forward rotation transmission series. Elements and
The first reverse rotation transmission rotary element, the third reverse rotation transmission rotary element, the control rotary element of the second reverse rotation transmission control means, and the interlocking rotary element in the reverse rotation transmission series are respectively composed of gears. The composite spring clutch mechanism according to claim 1, wherein 3. The first normal rotation transmission control means selectively blocks rotation of the control rotation element rotatably fitted in the first normal rotation transmission coil spring and the control rotation element. Rotation control means, the input side end of the first forward rotation transmission coil spring is connected to the control rotation element, and the first reverse rotation transmission control means includes the first reverse rotation transmission coil. A control rotary element rotatably fitted to the spring, and a rotation control means for selectively blocking rotation of the control rotary element, wherein the input side end of the first reverse rotation transmission coil spring is the control. The compound spring clutch mechanism according to claim 1 or 2, wherein the compound spring clutch mechanism is connected to a rotating element. 4. The control rotation element in each of the first forward rotation transmission control means and the first reverse rotation transmission control means is constituted by a ratchet wheel having a plurality of pawls formed on a peripheral side surface thereof. The rotation control means in each of the first forward rotation transmission control means and the first reverse rotation transmission control means has an operating position for engaging with the pawl of the ratchet wheel and a non-acting position for disengaging from the pawl of the ratchet wheel. 3. A locking member movable between the locking member and an actuating means for selectively positioning the locking member between the working position and the non-working position. The composite spring clutch mechanism described in the item. 5. The composite spring clutch mechanism according to claim 4, wherein the actuating means is composed of an electromagnetic solenoid.