JPH0819967B2 - Electromagnetically controlled spring clutch mechanism - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electromagnetically controlled spring clutch mechanism that transmits a driving force by utilizing contraction of a coil spring means.

BACKGROUND ART Conventionally, an electromagnetically controlled spring clutch mechanism using coil spring means has been used to selectively transmit a driving force of an input rotary element that is rotationally driven. As this type of clutch mechanism, for example, one disclosed in Japanese Patent Laid-Open No. 59-175633 can be cited, and the applicant of the present invention proposes, as an improvement of the above-mentioned clutch mechanism, Japanese Patent Application No. 60-78439 (name: Electromagnetically controlled spring clutch mechanism) disclosed in the specification and drawings are proposed. Such an electromagnetically controlled spring clutch mechanism is rotatably mounted on a shaft member, an input rotary element mounted on the shaft member, a rotor rotated integrally with the shaft member, and located on one side of the rotor so as to face each other. The armature, the rotation support member rotatably mounted on the shaft member, and the biasing spring member disposed between the armature and the rotation support member and elastically biasing the armature in a direction separating from the one surface of the rotor. And electromagnetic means for magnetically attracting the armature to the one side of the rotor against the elastic biasing action of the biasing spring member, one end connected to the input rotary element and the other end connected to the rotation support member. The coil spring means is provided. When the electromagnetic means is energized and urged, the armature is attracted to the one surface of the rotor by the magnetic attraction force of the electromagnetic means, which causes a relative speed difference between the input rotary element and the rotary support member. When the coil spring means is contracted, and thus the driving force from the input rotary element is transmitted to the shaft member via the coil spring means, while the energization of the electromagnetic means is stopped and deenergized, the elasticity of the bias spring member is reduced. The biasing action causes the armature to move away from said one side of the rotor, thereby releasing the contraction of the coil spring means and thus not transmitting the driving force from the input rotary element to the shaft member.

However, the above-described electromagnetically controlled spring clutch mechanism has a configuration in which it is in the connected state and transmits the driving force when the electromagnetic means is energized, and therefore there are the following problems to be solved. For example, in a device such as a winder of a textile machine, since a long thread-shaped or strip-shaped device is continuously supplied, the driving force is normally transmitted to rotationally drive the output rotary element. Power transmission is cut off. Therefore, when the conventional electromagnetically controlled spring clutch mechanism is applied to the above-mentioned device, it is necessary to energize the electromagnetic means that is always energized, and this requires a lot of power consumption. There's a problem.

<Objects of the Invention> The present invention has been made in view of the above facts, and its main object is to solve the problems described above and to provide a novel and excellent device that can be conveniently applied to a device that constantly transmits a driving force. An object is to provide an electromagnetically controlled spring clutch mechanism.

<Summary of the Invention> According to the present invention, a shaft member rotatably mounted, an input rotary element mounted rotatably relative to the shaft member, and movable in the axial direction of the shaft member. The armature attached to the armature, the rotating member mounted on the one side of the amateur so as to be rotatable relative to the shaft member, and the biasing means for biasing the armature in the direction close to the rotating member. An electromagnetic means for magnetically attracting the armature in a direction away from the rotating member against the biasing action of the biasing means, and a first rotating integrally with the input rotary element.
A boss member, a second boss member that is attached to the shaft member adjacent to the first boss member, and rotates integrally with the shaft member; and a second boss member that straddles the first boss member and the second boss member. And a coil spring means having one end connected to the input rotary element and the other end connected to the rotary member, the coil spring means including a predetermined length of the input rotary element from the one end to the other end. Is wound in a direction in which the input rotary element and the rotary member are contracted when a relative speed difference is generated accompanying the rotation in the direction, and when the electromagnetic means is deenergized, One surface is pressed against the opposing surface of the rotary member by the action of the biasing means, and a rotation speed blocking force acting on the rotary member causes a relative speed difference between the input rotary element and the rotary member to cause the coil spring means to move. Contracted and thus the rotational driving force of the input rotary element is When transmitted to the shaft member via the il spring means and the first and second boss members, while the electromagnetic means is biased, the armature is separated from the rotating member by the magnetic attraction action of the electromagnetic means. Thus, there is provided an electromagnetically controlled spring clutch mechanism which is characterized in that it does not substantially act on the rotating member and thus transmission of the rotational driving force of the input rotating element is stopped.

In the electromagnetically controlled spring clutch mechanism according to the present invention, since the coil spring is contracted and the driving force from the input rotary element is transmitted under normal conditions, that is, when the electromagnetic means is deenergized, its operation is the same as the conventional one. This is completely opposite to the electromagnetically controlled spring clutch mechanism, and does not require any power consumption when transmitting the driving force.

<Preferred Specific Example of the Invention> A specific example of the electromagnetically controlled spring clutch mechanism configured according to the present invention will be described below with reference to the accompanying drawings. In the specific example, the electromagnetic control spring clutch mechanism is described as being applied to the drive-side transport roller of the transport roller pair that continuously transports a long strip-shaped member, but the invention is not limited to this and other various It can also be applied to the element of.

In FIG. 1 showing an example in which an electromagnetically controlled spring clutch mechanism is applied to a drive-side transport roller, a pair of substrates 2 and 4 (for example, vertical substrates of the apparatus) are arranged at a distance in the left-right direction in FIG. Has been done. A support shaft 10 (constituting a shaft member) is rotatably mounted between the pair of substrates 2 and 4 via bearing members 6 and 8, and a conveyance roller 12 is mounted at an intermediate portion of the support shaft 10. There is. One end of the support shaft 10 penetrates the substrate 2 and is slightly outward (left in FIG. 1).
The locking member 14 is locked to the protruding end portion. Also, the other end of the support shaft 10 penetrates the substrate 4 and projects outward (to the right in FIG. 1), and the electromagnetically controlled spring clutch mechanism according to the present invention indicated by numeral 16 at the projecting end is shown in its entirety. It is mounted, and the locking members 18 and 20 are also locked. Therefore, when the clutch mechanism 16 is in the connected state, the driving force from the drive source (not shown) is transmitted to the support shaft 10 via the clutch mechanism 16 and is rotationally driven.
12 cooperates with the other conveying roller (not shown) to convey the belt-shaped member to the downstream side.

Referring to FIG. 2 together with FIG. 1, the illustrated electromagnetically controlled spring clutch mechanism 16 includes a gear wheel 22, an armature 24, a rotating member 26, an electromagnetic means 28 and a coil spring means 30 which constitute an input rotary element. . As will be described in detail later, the clutch mechanism 16 of the specific example has two forms by changing the assembling order of these various components, that is, the outside of the small diameter portion 10a provided at the other end of the support shaft 10. First with gear 22 located at the end
1) (the form shown in FIGS. 1, 2, and 6) or the second form (form shown in FIG. 7) in which the gear 22 is located at the end of the small diameter portion 10a on the side of the substrate 4. Can be used in

The structure of the electromagnetically controlled spring clutch mechanism 16 will be described in detail mainly with reference to FIG. 2 (therefore, it is used in the first embodiment). The electromagnetic means 28 arranged at one end of the small-diameter portion 10a of the support shaft 10, that is, at the end on the substrate 4 side has a cylindrical field 32 and a coil assembly 34 mounted in the field 32. Through the sleeve member 36 to the small diameter portion 10a
It is mounted rotatably relative to (see FIG. 1).
A projecting portion 38 (Fig. 2) is integrally provided on the outer peripheral surface of the field 32, and a locking recess 40 is formed in the projecting portion 38.
On the other hand, a locking projection 41 is provided on the substrate 4 by bending a part thereof outward, and the locking projection 41 is locked in the locking recess 40 formed in the protrusion 38. (See FIG. 1). Therefore, as can be easily understood, the electromagnetic means 28 is not substantially rotated, and the support shaft 10 is rotated relative to the electromagnetic means 28. For electromagnetic means 28,
Further details will be given later.

Gear 2 arranged at the other end of the small diameter portion 10a, that is, at the outer end
2 is mounted so as to be relatively rotatable with respect to the small diameter portion 10a. An annular protrusion 42 is integrally provided on one surface (left surface in FIGS. 1 and 2) of the gear 22.
A cylindrical first boss member 44 is disposed inside the 42.
In the specific example, the first boss member 44 is a through hole 46 formed in the side surface of the gear 22 (two in the specific example).
It is mounted so as to rotate integrally with the gear 22 by inserting a protrusion 48 provided on the end surface thereof. The first boss member 44 faces the second boss member described later,
That is, it extends to the left in FIGS. 1 and 2. still,
The first boss member 44 may be formed integrally with the gear 22. Although not shown, the gear 22 is drivingly connected to a drive source such as an electric motor through an appropriate gear mechanism or the like,
It is rotationally driven in the direction indicated by an arrow 50 (FIG. 2) by the drive source. The locking member 20 is locked to the outer end of the small-diameter portion 10a (the outer side of the mounting portion of the gear 22).
The gear 20 prevents the gear 22 and the like from coming off the small diameter portion 10a (Fig. 1).

The second boss member 44, which is mounted on the gear 22, is adjacent to the second boss member 44.
The boss member 52 is arranged. The second boss member 52 has a small diameter portion 54 provided at one end portion (left end portion in FIGS. 1 and 2) and the other end portion (right end portion in FIGS. 1 and 2).
Has a large-diameter portion 56 provided on the. Second boss member 52
The small-diameter part 54 has a pair of notches that define one pin receiving part.
58 is formed, and the small diameter portion 10 is formed in the pair of notches 58.
The second boss member 52 is integrated with the small diameter portion 10a by engaging the projecting portions at both ends of the pin member 62 mounted in the pin hole 60 (FIG. 2) formed through the a. It is mounted to rotate. In the specific example, the large-diameter portion 56 of the second boss member 52 is also formed with a pair of engagement recesses 64 (FIG. 2) that define the other pin receiving portion. The pair of engagement recesses 64 are used when the illustrated electromagnetically controlled spring clutch mechanism 16 is assembled in the second form, that is, the form shown in FIG. 7, as will be described later. The protrusions at both ends of the pin member 62 mounted in the pin hole 60 are engaged in the recess 64. Therefore, as can be easily understood, the engaging recess 64 can be omitted when only the first form (the form shown in FIGS. 1, 2, and 6) is assembled.
On the other hand, the cutout 58 can be omitted when only the second form (the form shown in FIG. 7) is assembled.

The rotary member 26 is mounted rotatably relative to the small diameter portion 10a. The rotating member 26 is formed of a short tubular member, and is rotatably attached to the small diameter portion 54 of the second boss member 52 in the specific example.

The coil spring means 30 is fitted over the first boss member 44 and the second boss member 52. The large diameter portion 56 of the second boss member 52 mounted on the small diameter portion 10a is the first boss member.
1 and 2, the boss members 44 and 52 are in contact with each other or brought into close proximity to each other. The outer diameter of the large-diameter portion 56 of the second boss member 52 and the outer diameter of the first boss member 44 are substantially equal to each other, and the coil spring means 30 includes the first boss member 44 and the second boss member 52. It is fitted over both of the large diameter portions 56. In the specific example, the coil spring means 30 is clockwise when viewed from the left side in FIGS. 1 and 2 (that is, when the gear wheel 22 is rotated in the direction indicated by the arrow 50, the rotation member 26 is caused to rotate). It is wound in a direction in which it contracts when a relative speed difference is generated between the gear 22 and the rotary member 26 due to a blocking force. One end 30a of the coil spring means 30 is engaged with a notch 66 formed in the annular protrusion 42 of the gear 22 (in the specific example, one of four notches 66 formed at intervals in the circumferential direction). The other end 30b is connected to the gear 22 by being stopped, and the other end 30b is formed with a notch 68 (in the specific example, a circumferential interval in the circumferential direction) formed at the end (the right end in FIGS. 1 and 2) of the rotating member 26. Put 6
It is connected to the rotary member 26 by being engaged with any one of the notches 68 formed individually.

An armature 24 is further arranged between the electromagnetic means 28 and the rotating member 26 arranged as described above. Amateurs 24 that can be formed from magnetic materials with wear resistance
Is composed of a disk-shaped member. The amateur 24 is arranged in the axial direction of the small diameter portion 10a, in other words, the rotating member 2
It is mounted so that it can move toward and away from 6. In the specific example, the armature 24 is disposed within the outer wall 72 of the field 32 of the electromagnetic means 28 and is mounted to the outer end of the sleeve member 36 mounted to the field 32. The field 32 has an outer side wall 72 and an inner side wall 74 disposed inside the outer side wall 72 (FIG. 1). The sleeve member 36 is attached to the inner side wall 74, and one end of the inner side wall 74 of the sleeve member 36 (that is, An armature 24 is rotatably attached to a protrusion protruding from the right end in FIGS. 1 and 2 (FIG. 1). The peripheral portion of the armature 24 is provided with three protrusions 76 that are spaced apart in the circumferential direction and project outward in the radial direction. On the other hand, the outer wall 72 of the field 32 of the electromagnetic means 28 is provided with a rotation blocking receiving portion 78 extending from the opened one end surface to the other end. Three rotation blocking receivers 78 are formed at intervals corresponding to the protrusions 76 provided on the amateur 24, and extend to the widthwise center of the outer wall 72 of the field 32. The protrusion 76 of the amateur 24 is received in the portion 78. Therefore, due to the fact that the electromagnetic means 28 is not rotated, the armature 24 is not substantially rotated by the action of the rotation block receiving portion 78 and the protrusion 76, and the small diameter portion 10a is rotated with respect to the amateur 24. It on the other hand,
Movement of the amateur 24 along the rotation blocking receiver 78 is allowed,
The armature 24 is movable in the axial direction of the small diameter portion 10a. In connection with such an amateur 24, as shown in a specific example, the locking member 80 (the first member) is attached to the inner surface of one end portion of the outer wall 72 of the field 28.
It is preferable to mount an annular recess 81 (fourth portion) on the inner surface of one end of the outer wall 72 of the field 28, for example.
(Fig. 5), a C-shaped locking member 80 which can be elastically deformed can be locked in the recess 81 in a predetermined manner. Thus, as can be easily understood from FIG. 1, the peripheral edge portion of the armature 24 abuts on the locking member 80, so that the armature 24 is reliably prevented from coming off the field 28.

A biasing means is further interposed between the electromagnetic means 28 and the amateur 24. In the specific example, the biasing means is composed of an elastic biasing spring member 82, which is fitted between the sleeve member 36 mounted on the field 32 and is interposed between the armature 24 and the bottom surface of the spring accommodating recess 84 provided on the inner wall 74. Has been done. The elastic bias spring member 82 acts on the armature 24 to elastically bias it to the right in FIGS. 1 and 2.

Next, the electromagnetic means 28 will be described in detail with reference to FIGS. 3 to 5 together with FIG. The electromagnetic means 28 shown is
It includes a tubular field 32, a coil assembly 34 and a protective member 86. The field 32 has a substantially circular end wall 88, and a circular opening is formed in the center of the end wall 88. A cylindrical outer wall 72 and an inner wall 74 that extend to one side (right in FIG. 4) are provided at the outer peripheral edge and the inner peripheral edge of the end wall 88, and one end surface of the field 32 is open. In a specific example, the outer wall 72 extends beyond one end of the inner wall 74 and projects further to one side. In the field 32, as clearly shown in FIG. 5, the outer wall 72 is provided with a mounting opening 90 opened to the one end surface of the field 32. In the specific example, the mounting opening 90 is substantially rectangular and extends from the opening present at one end surface of the field 32 toward the other end to the inner surface of the end wall 88 (FIGS. 4 and 5). In the illustrated field 32, shoulder portions 94a and 94b are provided on the portion defining the mounting opening 90 of the outer wall 72, and more specifically, on the opposing portions 92a and 92b defining the side surface of the mounting opening 90, respectively. (Figs. 3 and 5). The shoulders 94a and 94b extend from one end of the outer wall 72 of the field 32 to the other end thereof in the mounting direction of the protective member 86 described later. The sleeve member 36 is attached to the inner surface of the inner wall 74 by press fitting.
As shown in FIG. 4, the sleeve member 36 extends beyond one end of the inner wall 74 and further projects to one side (FIG. 4).
The armature 24 is rotatably mounted on the protruding portion of the sleeve member 36 as described above (FIG. 1). on the other hand,
One end of the outer wall 72 further projects to one side further than one end of the sleeve member 36, and an annular recess 81 for locking the locking member 80 is formed on the inner peripheral surface of the protruding end. (Fig. 4). Further, the outer wall 72 is formed with a rotation blocking receiving portion 78 (three in the specific example) that opens to the one end face,
Each rotation blocking receiver 78 extends toward the other end to one end surface of the inner wall 74. Further, an annular spring accommodating recess 84 is provided on the inner peripheral portion of the inner side wall 74 of the field 32, and the outer side wall 72 thereof is provided.
A projecting portion 38 having a locking recess 40 is provided on the outer peripheral surface of the. As can be understood from FIGS. 4 and 5, the field 32 having such a structure can be easily integrally formed by sintering, and the sleeve member 36 is provided on the inner side wall 74 of the field 32 sintered. Fifth by press fitting
It is assembled in the form shown in the figure.

The coil assembly 34 also includes a bobbin 96 and a coil body 98 wound around the bobbin 96. The illustrated bobbin 96 has a hollow sleeve portion 100 and annular flange portions 102a and 102b provided at both ends of the sleeve portion 100, and is formed by integral molding of synthetic resin or ceramic in a specific example. Then, as shown in FIG. 4, the coil body 98 is wound around the outer peripheral surface of the sleeve portion 100 of the bobbin 96a and is positioned between the flange portions 102a and 102b. In the specific example,
As shown in FIG. 5, the coil body 98 wound on the bobbin 96 is
Further, it is covered with a band-shaped seal member 104, and only both ends thereof are led out from the seal member 104. As will be described later, lead wires 106a and 106b that form a connecting wire portion are connected to both ends of the coil body 98, and the lead wires 106a and 106b are connected to assemble the structure shown in FIG. In the coil body 98 described above, the flange portion 10
It is preferable to provide a positioning protrusion 108 protruding outward in the radial direction on at least one peripheral edge of 2a and 102b, and it is more preferable to provide the positioning protrusion 108 on the flange portion 102a as a specific example.

Further, the protection member 86 has a main body 110. In the illustrated specific example, the main body 110 has a rectangular cross section, and a through hole 112 penetrating in the axial direction is formed in the center thereof.
Further, engaging projections 114 that project outward are provided on both surfaces (both surfaces facing each other) of the one end portion. The protective member 86 having such a configuration can be formed by, for example, integral molding of synthetic resin or ceramic.

The electromagnetic means 28 described above includes a field 32, a coil assembly.
By assembling the 34 and the protective member 86 in accordance with the following assembling procedure, for example, they are assembled in the form shown in FIGS. 3 and 4 (hence, the form also shown in FIGS. 1 and 2).

That is, first, for example, a vinyl electric wire is cut into a predetermined length to form a pair of lead wires 106a and 106b, and connected to one end of the cut lead wires 106a and 106b, respectively, as shown in FIG. Crimp the terminals 116a and 116b. At the time of this crimping, since nothing is connected to both ends of the lead wires 106a and 106b, the crimping of the connection terminals 116a and 116b can be performed easily and easily, which facilitates the crimping step. Can be automated.

Next, the other ends of the lead wires 106a and 106b are connected to both ends of the coil body 98 wound around the bobbin 96, respectively. Thus, the coil assembly 34 having the form shown in FIG. 5 is assembled.

Then, the lead wire 106a connected to the coil body 98 and
106b (constituting the connecting wire portion of the coil body 98) to the protective member 86
The protective member 86 is inserted into the through hole 112 formed in the above and is positioned at the other end of the lead wires 106a and 106b.

Next, the protective member 86 is mounted in the mounting opening 90 formed in the outer wall 72 of the field 32, and the coil assembly 34 is mounted between the outer wall 72 and the inner wall 74 of the field 32 as required. At the time of such mounting, in the protective member 86, on the one end face side of the field 32, the main body 110 of the protective member 112 and the opening of the mounting opening 90 formed in the field 32 (the one end face of the field 32). (The opening existing in) and the engaging projection 114 of the protection member 86 and the field 3
Align the shoulders 94a and 94b provided in 2. Further, in the coil assembly 34, the bobbin 96 is positioned between the outer side wall 72 and the inner side wall 74 of the field 32 on the one end face side of the field 32, and the positioning protrusion 108 provided on the bobbin 96 is provided. Field 32 shoulders 94a and 94b
Position between Then, the protection member 86 is attached in the mounting direction
That is, in FIG. 4, the mounting opening 90 is passed leftward through the above opening.
At the same time, the bobbin 96 is inserted and fixed between the outer side wall 72 and the inner side wall 74 of the field 32 through the open one end face in the mounting direction, that is, leftward in FIG. The bobbin 96 is fixed to the field 32 by, for example, providing a fixing projection (not shown) protruding somewhat outward in the radial direction on the outer surface (the surface facing the outer wall 72) of the inner wall 74 of the field 32. It is preferable that the bobbin 96 is press-fitted to the inner wall 74 where the fixing projection is present, and thus the bobbin 96 can be easily fixed without the need for a dedicated tool. The fixing projection (not shown) preferably has a shape in which the amount of projection outward in the radial direction gradually increases in the mounting direction of the bobbin 96.
Instead of the outer surface of 74, it may be provided on the inner peripheral surface of the sleeve portion 100 of the bobbin 96. When the bobbin 96 is mounted as described above, the bobbin 96 is assembled as shown in FIGS. 3 and 4.
That is, the main body 110 of the protective member 86 is located in the mounting opening 90 of the field 32 and protrudes outward of the outer wall 72 therethrough, and the lead wires 140a and 140b directly contact the edge portion defining the mounting opening 90. Is reliably prevented. Further, when the protective member 86 is moved outward in the radial direction with respect to the field 32, the engagement protrusion 114 thereof causes the shoulder portions 94a and 94b of the field 32 to move.
It is prevented by abutting against, and this surely prevents the protective member 86 from coming off through the mounting opening 90. Further, in such an assembled state, the positioning projection 108 provided on the flange portion 102a of the bobbin 96 has the protective member 8
6 is located between the shoulder portions 94a and 94b on the one end face side with respect to 6, and therefore, the mounting opening 90 of the protective member 86 is formed.
Protective member 86
Is securely mounted in the mounting opening 90 in the state shown in FIGS. 3 and 4. As can be easily understood from FIGS. 3 and 4, when the positioning protrusion 108 is provided on the flange portion 102a located on the one end face side of the field 32, the bobbin 96 can be easily mounted. Positioning, details shoulder 94
Positioning and lead wire 10 located between a and 94b to prevent relative rotation of bobbin 96 with respect to field 32.
Positioning the other end of 6a and 106b to the mounting opening 90 and preventing the protective member 86 from coming off through the opening of the mounting opening 90, but provided on the flange 102b located on the other end side of the field. Has only the above-described positioning action when the bobbin 96 is mounted.

In the specific example, then, after the elastic bias spring member 82 is fitted to the sleeve member 36 of the electromagnetic means 28, the amateur 24 is mounted as required, and then the annular recess formed in the outer wall 72 of the field 32 is fitted. The locking member 80 (FIG. 1) is locked. Therefore, the electromagnetic means 28, the elastic biasing spring member 82, and the armature 24 constitute an electromagnetic assembly, and when the electromagnetic control spring clutch mechanism 16 described later is assembled, the small diameter portion 10a of the support shaft 10 is in the state of the electromagnetic assembly. It is assembled.

In the electromagnetic means 28 configured as above, the coil body is
When the protective member 86 is attached to the lead wires 106a and 106b of 98, the protective member 86 can be attached to the field 32 through the opened opening of the attachment opening 90 formed in the field 32 as required. Therefore, the conventional process of deriving the connecting wire portion (conventionally, a hole is formed in the outer wall of the field and the connecting wire portion is led out to the outside through the hole).
And the step of press-fitting the protective member (conventionally, the protective member mounted on the connecting wire portion was press-fitted into the hole formed in the outer wall of the field) can be omitted, and the assembling becomes easy and simple. It is also suitable for automation of assembly.

Again referring mainly to FIG. 1, the electromagnetically controlled spring clutch mechanism 16 of the specific example has the first embodiment by mounting the various components described above on the small diameter portion 10a of the support shaft 10 as follows. Can be used. That is, when the first embodiment is used, as understood from FIG. 1, first, the small diameter portion 10a of the support shaft 10 is provided with the electromagnetic assembly (the electromagnetic means 28, the elastic bias spring member 82 and the armature 24). Mounted), and then the pin member 92 is mounted in the pin hole 60 of the small diameter portion 10a (the length of the pin member 62 is somewhat longer than the diameter of the small diameter portion 10a. Both ends are slightly projected from the small diameter portion 10a). Then, the second boss member 52 is attached to the small diameter portion 54 of the second boss member 52, and the rotary member 26 is attached to the small diameter portion 54. Both ends of the pin member 62 are positioned in one pin receiving portion defined by the notch 58. Further, the other end of the coil spring means 30 is fitted to the large diameter portion 56 of the second boss member 52, and the other end 30b is locked in the notch 68 formed in the rotating member 26. Next, the gear 22 to which the first boss member 44 is attached is attached, the first boss member 44 is positioned within one end of the coil spring means 30, and its one end 30a is formed on the annular protrusion 42 of the gear 22. It locks in the notch 66 formed. Then, the locking member 20 is locked to the other end (the right end in FIG. 1) of the small diameter portion 10a.
Thus, the various components are supported by the support shaft 10 as shown in FIG.
It is attached to the small diameter portion 10a of and is used in the first form.

In the first embodiment, as shown in FIG. 1, the electromagnetic means 28 is sequentially arranged from one end of the small diameter portion 10a toward the other end.
The elastic biasing spring member 82, the armature 24, the rotating member 26, the coil spring means 30 and the gear 22 are arranged, and the rotating member 26 is located on one side (right side in FIG. 1) of the armature 24 so as to face this one side, The electromagnetic means 28 is located on the other surface side (left surface in FIG. 1) of the amateur 24, and the elastic biasing spring member 82 interposed between the electromagnetic means 28 and the amateur 24 acts on the amateur 24 to rotate it. 26 is pressed elastically. In this type of clutch mechanism 16, as in the specific example, the surface of the rotary member 26 against which the armature 24 is pressed (the surface that faces one side of the armature 24 and is the left side in FIG. 1) has excellent wear resistance. It is preferable to provide the friction member 120. As the friction member 120, for example, polyslider tape (trade name sold by Asahi Polyslider Manufacturing Co., Ltd.) can be preferably used.

In the first mode, when the electromagnetic means 28 is deenergized, the armature 24 is elastically pressed against the rotating member 26 by the action of the elastic bias spring member 82, and the armature 24 is
The rotary member 26 and the rotary member 26 are connected via the friction member 120. Therefore, when the gear 22 is rotated in the direction shown by the arrow 50 (FIG. 2) in the deenergized state of the electromagnetic means 28, the rotating member 26 is also rotated in the same direction via the coil spring means 30. On the other hand, at this time, the rotation of the amateur 24 is restricted because the amateur 24 and the rotation member 26 are connected to each other via the friction member 120.
The force that prevents the rotation acts on 26. When such a rotation blocking force acts, a relative speed difference is generated between the gear 22 and the rotating member 26 due to this force, and the coil spring means 30 contracts due to the speed difference. Thus, the coil spring means
The first boss member 44 and the large-diameter portion 56 of the second boss member 52 are connected via 30 and the support shaft 10 includes the bin member 62, the second boss member 52, the coil spring means 30, and the first boss member 52. It is drivingly connected to the gear 22 via the boss member 44. Thus, the rotational driving force of the gear 22 is transmitted to the support shaft 10, and the support shaft 10, and thus the transport roller 12 mounted on the support shaft 10, accompanies the rotation of the gear 22 and is indicated by the arrow 50.
Is rotated in the direction indicated by. In such a state, the rotary member 26 rotates relative to the armature 24 while sliding on one side thereof, and the coil spring means 30 is maintained in the contracted state described above. It should be noted that, as will be readily understood from the above description, the friction member 120 may be any member that can generate a rotation blocking force sufficient to contract the coil spring means 30, and is therefore formed of a material having a relatively low friction coefficient. be able to.

On the other hand, when the electromagnetic means 28 is energized and energized in the first embodiment, the electromagnetic means 28 magnetically attracts the armature 24 against the elastic biasing action of the elastic biasing spring member 82. As a result, as shown in FIG. 6, the armature 24 moves to the left in FIG. 1 in the axial direction of the support shaft 10 and is separated from the friction member 120 of the rotating member 26, and the other surface is the inner wall 74 of the field 32. The one end surface of the armature 24 is abutted, and the above-mentioned connected state between the armature 24 and the rotating member 26 is released. When the connected state is released, the rotating member 26 becomes rotatable, and therefore the elastic member of the coil spring means 30 accumulated when the driving force is transmitted causes the rotating member 26 to move in the direction opposite to the direction indicated by the arrow 50. With a slight rotation, the coil spring means 30 is expanded. That way,
The connection by the coil spring means 30 between the first boss member 44 and the large diameter portion 56 of the second boss member 52 is released, and thus the gear 22
And the drive connection of the support shaft 10 is released. Such electromagnetic means 28
At the time of biasing, the rotating member 26 only rotates via the first boss member 44 and the coil spring means 30 accompanying the rotation of the gear 22, and the support shaft 10, and hence the conveying roller 12, rotate. There is no.

The electromagnetically controlled spring clutch mechanism 16 described above can be further utilized in the second form shown in FIG. 7 by mounting various components on the small diameter portion 10a of the support shaft 10 as follows. Referring to FIG. 7, when the gear 22 is used in the second mode, first, the gear 22 is mounted on the small diameter portion 10a of the support shaft 10 (the mounting of the gear 22 is performed by the first boss mounted on the gear 22). The member 44 extends to the right in FIG. 7, that is, extends toward the other end of the small diameter portion 10a), and then the pin hole 60 of the small diameter portion 10a.
The pin member 62 is inserted into (FIG. 2). Next, one end of the coil spring means 30 is fitted onto the first boss member 44, and the one end 30a thereof is inserted into the notch 66 formed in the annular protrusion 42 of the gear 22. Further, with the rotating member 26 attached to the small diameter portion 54 of the second boss member 52 (or after attaching the second boss member 52, the rotating member 26 is attached to the small diameter portion 54).
The boss member 52 is attached to the small-diameter portion 10a, and the large-diameter portion 56 is positioned inside the other end of the coil spring means 30 to form the engagement recess 64 formed in the large-diameter portion 56 (the other pin receiving portion is defined. To engage both ends of the pin member 62, and then the coil spring means.
The other end 30b of 30 is inserted into the notch 68 formed in the rotating member 26. Then the electromagnetic assembly (electromagnetic means 28, amateur
The assembly including 24) is attached to the small diameter portion 10a, and the rotating member 26
So that amateurs 24 face each other, and then
The locking member 20 is locked to the other end of the small diameter portion 10a. Thus,
As shown in FIG. 7, the various components are the small diameter portion 10 of the support shaft 10.
It is attached to a and is used in the second form.

In the second embodiment, the gear 22, the coil spring means 30, are sequentially arranged from the one end side of the small diameter portion 10a toward the other end side.
The rotary member 26, the armature 24, the elastic biasing spring member 82 and the electromagnetic means 28 are arranged, and the armature is the same as in the first embodiment.
The rotary member 26 is located on one side (left side in FIG. 7) of 24 so as to face the one side, and the other side of the amateur 24 (the seventh side).
Electromagnetic means 28 is located on the right side in the drawing, and an elastic biasing spring member 82 interposed between the two means rotates the armature 24.
26 is pressed elastically.

When used in the second mode, substantially the same operational effects as in the case of using the first mode are achieved. That is, when the electromagnetic means 28 is deenergized, since the rotating member 26 and the armature 24 are connected via the friction member 120 by the action of the elastic biasing spring member 82, the coil spring means 30 as described above. Are contracted so that the first boss member 44 and the large-diameter portion 56 of the second boss member 52 are connected via the coil spring means 30, and thus the rotational driving force of the gear 22 is generated by the support shaft 10.
Is transmitted to On the other hand, when the electromagnetic means 28 is biased, the armature 24 is magnetically attracted and separated from the rotating member 26, so that the contracted coil spring means 30 is expanded as described above, and the first boss is released. The connection of the second boss member 52 of the member 44 by the coil spring means 30 is released and thus the gear 22
The connection between the support shaft 10 and the support shaft 10 is released.

Since it is as described above, the electromagnetically controlled spring clutch mechanism of the specific example can be used in any of the two types by only changing the assembly order, and can be used over a wide range without changing the design. .

Although one specific example of the electromagnetically controlled spring clutch mechanism configured according to the present invention has been described above, the present invention is not limited to this specific example, and various changes and modifications are made without departing from the scope of the present invention. Is possible.

<Effects of the Invention> As described in detail above, in the electromagnetically controlled spring clutch mechanism according to the present invention, the driving force is transmitted when the electromagnetic means is deenergized (in other words, in the non-energized state), while the electromagnetic means is operated. The drive force is cut off when the device is energized (in other words, energized). Therefore, when applied to a device that requires constant drive force transfer, the power consumption is significantly reduced. It can be done.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a partial cross section of an example in which a specific example of an electromagnetically controlled spring clutch mechanism configured according to the present invention is applied to a conveyance roller in a first mode. FIG. 2 is an exploded perspective view showing the electromagnetically controlled spring clutch mechanism of FIG. 1 in an exploded manner. FIG. 3 is a front view showing a partially cutaway electromagnetic means in the electromagnetically controlled spring clutch mechanism of FIG. 1. FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5 is an exploded perspective view showing the electromagnetic means of FIG. 3 in an exploded manner. FIG. 6 is a cross-sectional view showing a partial cross-section of a state in which the electromagnetic means is biased when used in the first mode. FIG. 7 shows the electromagnetic control spring clutch mechanism of FIG. 1 in the second mode. Sectional drawing which shows the applied example in a partial cross section. 10 …… Support shaft (shaft member) 22 …… Gear (input rotary element) 24 …… Amateur 26 …… Rotating member 28 …… Electromagnetic means 30 …… Coil spring means 32 …… Field 34 …… Coil assembly 44… … First boss member 52 …… Second boss member 82 …… Biasing spring member (biasing means) 96 …… Bobbin 98 …… Coil body 120 …… Friction member

Claims (10)

[Claims] 1. A rotatably mounted shaft member, an input rotary element rotatably mounted relative to the shaft member, and an armature movably mounted in the axial direction of the shaft member. , A rotating member facing one side of the armature and rotatably mounted relative to the shaft member, a biasing means for biasing the amateur in a direction approaching the rotating member, and a biasing means of the biasing means. Electromagnetic means for magnetically attracting the armature in a direction away from the rotating member against a biasing action, a first boss member that rotates integrally with the input rotary element, and the first boss member A second boss member attached to the shaft member and rotating integrally with the shaft member, and one end of the second boss member fitted over the first boss member and the second boss member to the input rotary element. Coil spring hand connected to the rotary member and the other end connected to the rotary member The coil spring means is contracted from the one end to the other end when a relative speed difference occurs between the input rotary element and the rotary member accompanying the rotation of the input rotary element in a predetermined direction. When the electromagnetic means is de-energized, the one side of the armature is pressed against the opposing surface of the rotating member by the action of the biasing means, and the rotation blocking acting on the rotating member is applied. A force causes a relative speed difference between the input rotary element and the rotary member to contract the coil spring means, and thus the rotational driving force of the input rotary element is applied to the coil spring means and the first and second boss members. Is transmitted to the shaft member via the electromagnetic means, while the electromagnetic means is energized, the armature is separated from the rotary member by the magnetic attraction action of the electromagnetic means and does not substantially act on the rotary member, and thus Rotational drive of the input rotary element An electromagnetically controlled spring clutch mechanism characterized in that power transmission is stopped. 2. The electromagnetically controlled spring clutch mechanism according to claim 1, wherein a friction member having wear resistance is provided on a surface of the rotary member facing the armature. 3. The electromagnetic means is disposed on the other surface side of the armature, and the biasing means is composed of an elastic biasing spring member interposed between the electromagnetic means and the armature, and the elastic biasing spring member is 3. The elastic member according to claim 1, wherein the armature is elastically biased toward the rotating member.
The electromagnetically controlled spring clutch mechanism described in the item. 4. The armature is provided with a protrusion projecting outward in the radial direction, while the electromagnetic means is provided with a rotation blocking receiver extending in the axial direction of the shaft member, and the protrusion is rotated by the rotation preventing receiver. The electromagnetically controlled spring clutch mechanism according to claim 3, which is received in the blocking receiving portion so as to be movable in the axial direction of the shaft member. 5. The first boss member is attached to the input rotary element, the second boss member is attached to the shaft member through a pin member, and the shaft member is associated with the pin member. Has a pin hole in which the pin member is mounted, and on the other hand, pin receiving portions are provided at both ends of the second boss member. When the electromagnetic means, the biasing means, the armature, the rotating member, the coil spring means and the input rotating element are arranged, the pin member mounted in the pin hole of the shaft member is the second member. The input rotation element, the coil spring means, and the rotation member are engaged with the pin receiving portion provided at one end of the boss member, and sequentially from the one end side of the shaft member toward the other end side thereof. When the amateur, the biasing means and the electromagnetic means are arranged, they are mounted in the pin holes of the shaft member. The electromagnetic control spring clutch mechanism according to claim 1, wherein the pin member engages with the pin receiving portion provided at the other end of the second boss member. 6. The electromagnetic means includes a tubular field having an open end, a bobbin and a coil body wound around the bobbin, and a coil assembly mounted in the field, and the coil. A protective member attached to the connecting line portion of the body, and an attachment opening opened to the one end face is formed in the outer wall of the field, and the protective member is attached to the attachment opening through the one end face. The electromagnetically controlled spring clutch mechanism according to any one of claims 1 to 5. 7. A shoulder portion extending in the mounting direction of the protective member is formed at a portion of the field defining the mounting opening, and the protective member extends through the mounting opening to the outer wall of the field. 7. The electromagnetically controlled spring clutch mechanism according to claim 6, further comprising a main body portion projecting outwardly of the above and an engaging projection for engaging with the shoulder portion. 8. The bobbin has a sleeve portion around which the coil body is wound, and flange portions provided at both ends of the sleeve portion, and at least one of the flange portions is provided with a positioning protrusion. An electromagnetically controlled spring clutch mechanism according to claim 7. 9. The electromagnetic control spring clutch mechanism according to claim 8, wherein the positioning projection is provided on the flange portion located on the one end face side of the field and is received by the shoulder portion. 10. An inner wall of the field or the bobbin of the coil assembly is provided with a fixing projection for fixing the bobbin. The electromagnetically controlled spring clutch mechanism according to claim 1.