JPS62224732A - Electro-magnetically controlled spring clutch mechanism - Google Patents

Abstract

PURPOSE:To reduce the electric power consumption by cutting off the transmission of driving power only when an electromagnetic means is electrically energized, by providing a shifting means for a relatively rotatable armature toward a rotary member connected to an input element through a coil spring and said electro-magnetic means for making resistance against said shifting means. CONSTITUTION:An electro-magnetic device 28 consisting of a coil assembly 34 and a field 32 is anchored to a base plate 4 by a recess 40, said field 32 being freely rotatable on a small diameter part of a shaft 10a with a sleeve member 36 between them. A gear wheel 22 of an input rotating element and a rotating member 26 are also freely rotatable on said small diameter part 10a. A coil spring means 30 is connected with said gear wheel 22 and said rotating member 36 at its both ends 30a, 30b. An armature 24 is installed between said rotating member 26 and said electro-magnetic device 28, said armature 24 being pushed toward right by a elastic spring shifting member 82. Due to the above construction, driving power is transmitted when said electro-magnetic device 28 is not energized and cut off when energized, thus enabling electricity consumption to be saved in the case where driving power is needed normally.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an electromagnetically controlled spring clutch mechanism that transmits driving force by utilizing contraction of a coil spring means.

BACKGROUND ART Conventionally, an electromagnetic control spring clutch mechanism using coil spring means has been used to selectively transmit the driving force of a rotationally driven input rotating element. As this type of clutch mechanism, for example, as an improvement of the Sochi mechanism disclosed in JP-A-59-175633, JP-A-60-60
We have proposed what is disclosed in the specification and drawings of No. 78439 (name: Electromagnetically Controlled Spring Clutch Mechanism). Such an electromagnetic control spring clutch mechanism includes a rotatably mounted shaft member, an input rotating element mounted on the shaft member, a rotor that is rotated integrally with the shaft member, and is located opposite to one side of the rotor. an armature, a rotational support member rotatably attached to the shaft member, and a biasing spring member disposed between the armature and the rotational support member and elastically biasing the armature in a direction away from the one surface of the rotor. and electromagnetic means for magnetically adhering the armature to the one side of the rotor against the elastic biasing action of the biasing spring member, one end of which is connected to the input rotational element and the other end of which is connected to the rotational support member. Coiled spring means are provided. When the electromagnetic means is energized and energized, the armature is attracted to the one side of the rotor by the magnetic attraction force of the electromagnetic means, thereby creating a relative speed difference between the input rotating element and the rotating support member. When the coil spring means is contracted, thus transmitting the driving force from the input rotary element to the shaft member through the coil spring means, and on the other hand de-energizing the electromagnetic means, the elasticity of the biasing spring member is reduced. The biasing action causes the armature to move away from said side of the rotor, thereby releasing the contraction of the coil spring means so that no drive force from the input rotating element is transmitted to the shaft member.

However, the electromagnetically controlled spring clutch mechanism described above,
The structure is such that when the electromagnetic means is energized, the electromagnetic means is connected to transmit driving force, and therefore, the following problem exists to be solved. For example, in a device such as a wine goo for textile machinery, since it is configured to connect and supply long thread-like objects or belt-like objects, the driving force is normally transmitted and the output rotating element is rotationally driven, and the above-mentioned drive is only performed in the event of an abnormality. Power transmission is cut off. Therefore, when a conventional electromagnetic control spring clutch mechanism is applied to the above-mentioned device, the electromagnetic means must be constantly energized, which requires a large amount of power consumption, etc. There is a problem.

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

<Summary of the Invention> According to the present invention, a rotatably mounted shaft member, an input rotating element rotatably mounted relative to the shaft member, and a shaft member movable in the axial direction of the shaft member are provided. a rotating member mounted on one side of the armature so as to be rotatable relative to the shaft member; and a biasing means for biasing the armature in a direction approaching the rotating member. and an electromagnetic means for magnetically attracting the armature in a direction away from the rotary member against the biasing action of the biasing means; one end connected to the input rotary element and the other end. comprises coil spring means connected to the rotating member, and when the electromagnetic means is deenergized, the one side of the armature is pressed against the opposite side of the rotating member by the action of the biasing means, The coil spring means is contracted by the rotation preventing force acting on the rotating member, and thus the rotational driving force of the input rotating element is transmitted to the shaft member via the coil spring means, and the rotational force is transmitted to the shaft member through the coil spring means. When the magnetic 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, thus preventing the transmission of the rotational driving force of the input rotary element. An electromagnetically controlled spring clutch mechanism is provided.

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 rotating element is transmitted during normal times, that is, when the electromagnetic means is deenergized, its operation is different from the conventional one. This is completely opposite to the electromagnetic control spring clutch mechanism, and the clutch mechanism itself does not require any power consumption when transmitting driving force.

<Preferred Embodiments of the Invention> Hereinafter, an integrated example of an electromagnetically controlled spring clutch mechanism constructed according to the present invention will be described with reference to the accompanying drawings. In a specific example, the electromagnetic control spring clutch mechanism will be explained by applying it to the drive-side conveyance roller of a conveyance roller pair that connects and conveys a long belt-like member, but the present invention is not limited to this. It can also be applied to various other elements.

' In FIG. 1 showing an example in which the Ff magnetic key control clutch mechanism is applied to the drive-side conveyance roller, a pair of substrates 2 and 4
(e.g., the vertical substrates of the device) are spaced laterally in FIG. 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.
A conveyance roller 12 is attached to the intermediate portion of the conveyance roller 12 . Support shaft 1
One end of o penetrates the substrate 2 and projects somewhat outward (to the left in FIG. 1), and a locking member 14 is attached to the projecting end.
is locked. Further, the other end of the support shaft 1o is connected to a substrate 4.
penetrates and protrudes outward (to the right in Figure 1),
t according to the invention, indicated in its entirety by the number 16 on the overhanging projecting end.
A magnetically controlled spring clutch mechanism is installed and further includes a locking member 18.
and 2o are also locked. Therefore, the clutch mechanism 16
When in the connected state, the driving force from drive # (not shown) is transmitted to the support shaft 1o via this clutch mechanism 16, and the rotationally driven transport roller 12 is connected to the other transport roller (not shown). They work together to transport the strip member to the downstream side.

Referring to FIG. 2 together with FIG. 1, the illustrated electromagnetic control spring clutch mechanism 16 includes a gear 22 constituting an input rotating element,
It includes an armature 24, a rotating member 26, an electromagnetic means 28, and a coil spring means 3o. Specific example clutch mechanism 1
6 can be made into two types by changing the assembly order of the various components, namely, the support shaft 1.
A first shape B (shape a shown in FIGS. 1, 2, and 6) in which the gear 22 is located at the outer end of the small diameter portion 10a provided at the other end of the small diameter portion 10a; It can be used in either the second form (the form shown in FIG. 7) in which the gear 22 is located at the end on the substrate 4 side.

The structure of the electromagnetic control 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 disposed at one end of the small diameter portion 10 a of the support shaft 10 , that is, the end on the base FiA side, has a cylindrical field 32 and a coil assembly 34 mounted within the field 32 . is the sleeve member 36
It is relatively rotatably attached to the small diameter portion 10a via the (see FIG. 1). A protrusion 38 (FIG. 2) is integrally provided on the outer peripheral surface of the field 32, and a locking recess 40 is formed in the protrusion 38. On the other hand, for the group Fi4,
By bending a part of the locking protrusion 4 outward,
1, and the locking protrusion 41 is locked in the locking recess 40 formed in the protrusion 38 (see FIG. 1). Therefore, as is easily understood, the electromagnetic means 28 is not substantially rotated, and the support shaft 10 is rotated relative to the magnetic means 28. Regarding the electromagnetic means 28,
This will be explained in more detail later.

A gear 22 disposed at the other end of the small diameter portion 10a, that is, at the outer end, is rotatably mounted relative to the small diameter portion 10a. An annular protrusion 42 is integrally provided on one side of the gear 22 (the left side in FIGS. 1 and 2), and a cylindrical first boss member 44 is disposed within this protrusion 42. .

In the specific example, this first boss member 44 has a protrusion 48 provided on its end surface inserted into a through hole 46 (two in the specific example) formed in the side surface of the gear 22. It is mounted so as to rotate together with the gear 22. The first boss member 44 extends toward the second boss member described later, that is, to the left in FIGS. 1 and 2. Note that the first boss member 44 can also 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 via a suitable gear mechanism or the like, and is driven by the drive source to move the arrow 50 (second
It is rotated in the direction shown in the figure.

The locking member 20 is locked to the outer end of the small diameter portion 10a (the portion outside the attachment portion of the gear 22), and the locking member 20 prevents the gear 22 and the like from coming off the small diameter portion 10a (see Fig. 1). ).

A second boss member 52 is disposed adjacent to the first boss member 44 attached to the gear 22. Second boss member 5
2 has a small diameter portion 54 provided at one end (left end in FIGS. 1 and 2) and a large diameter portion 56 provided at the other end (right end in FIGS. 1 and 2). ing. A pair of notches 58 defining one bottle receiving part are formed in the small diameter part 54 of the second boss member 52, and a bottle hole is formed in the pair of notches 58 passing through the small diameter part 10a. 6
0 (FIG. 2), the second boss member 52 is attached to the small diameter portion 10a so as to rotate together with the second boss member 52 by engaging the protruding portions at both ends of the bottle member 62 attached to the small diameter portion 10a. In the specific example, the large diameter portion 5 of the second boss member 52
6 also includes a pair of engagement recesses 64 defining the other pin receiving portion.
(Fig. 2) is formed. Such a pair of engagement recesses 6
4 is used when assembling the illustrated electromagnetic control spring clutch mechanism 16 into the second form, that is, the form shown in FIG. The protrusions at both ends of the pin member 62 mounted in the hole 60 are engaged. Therefore, as can be easily understood, when assembling only in the first form (form a shown in FIGS. 1, 2, and 6), the engaging recess 64 can be omitted; When assembling only in the second form B (the form shown in FIG. 7), the notch 58 can be omitted.

The rotating member 26 is rotatably mounted relative to the small diameter portion 10a. The rotating member 26 is composed of a short cylindrical member, and in the specific example, the small diameter portion 5 of the second boss member 52
4 is rotatably attached.

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 attached to the small diameter portion 10a is connected to the first
The boss member 44 extends rightward in FIGS. 1 and 2, and the opposing end surfaces of both the boss members 44 and 52 are brought into contact with or close 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, and the coil spring means 30 is formed between the first boss member 44 and the second boss member 52. It is fitted over both of the large diameter portions 56. In a particular embodiment, the coil spring means 30 is wound right-handed when viewed from the left side in FIGS. 1 and 2, i.e., it prevents the rotating member 26 from rotating when the gear 22 is being rotated in the direction indicated by arrow 50. When a relative speed difference occurs between the gear 22 and the rotating member 26 due to the force applied thereto, the gear 22 is wound in a direction in which it contracts. One end 30a of the coil spring means 30 engages with a notch 66 (in the specific example, one of four notches 66 formed at intervals in the circumferential direction) formed in the annular protrusion 42 of the gear 22. The other end 30b is connected to the gear 22 by stopping the other end 30b.
is a notch 68 (in the specific example, one of six notches 68 formed at intervals in the circumferential direction) formed at the end of the rotating member 26 (the right end in FIGS. 1 and 2). )
It is connected to the rotating member 26 by being locked to.

An armature 24 is further arranged between the electromagnetic means 28 and the rotating member 26 arranged as described above. The armature 24, which can be made of a wear-resistant magnetic material, is composed of a disc-shaped member. The armature 24 is mounted so as to be movable in the axial direction of the small diameter portion 10a, in other words, in the direction toward and away from the rotating member 26. In the specific example, the armature 24 is located within the outer wall 72 of the field 32 of the electromagnetic means 28 and is attached to the outer end of a sleeve member 36 that is attached to the field 32. The field 32 has an outer wall 72 and an inner wall 74 disposed inside the outer wall 72 (FIG. 1), a sleeve member 36 is attached to the inner wall 74, and the sleeve member 36 is attached to the inner wall 74.
The armature 24 is rotatably mounted on a protrusion that protrudes from one end (that is, the right end in FIGS. 1 and 2) of the inner wall 74 of the armature 6 (FIG. 1). Three protrusions 76 are provided on the peripheral edge of the armature 24 at intervals in the circumferential direction and protrude outward in the radial direction.

On the other hand, on the outer wall 72 of the field 32 of the electromagnetic means 28, there is a rotation prevention receiving part 78 extending from one open end surface to the other end.
is provided. Rotation prevention receiving part 7th is Amateur 2
Three protrusions 76 are formed at intervals corresponding to the protrusions 76 provided in the field 32 , and extend to approximately the center in the width direction of the outer wall 72 of the field 32 . Part 70 has been accepted. Therefore, since the electromagnetic means 28 is not rotated, the armature 24 is also not substantially rotated due to the action of the rotation prevention receiver 78 and the protrusion 76 (the small diameter portion 10a is not rotated with respect to the armature 24). be done.

On the other hand, the armature 24 is allowed to move along the rotation prevention receiving portion 78, and the armature 24 is freely movable in the axial direction of the small diameter portion tOa. In connection with such an armature 24, it is preferable to attach a locking member 80 (FIG. 1) to the inner surface of one end of the outer wall 72 of the field 28, as in the specific example. An annular recess 81 (FIGS. 4 and 5) is formed on the inner surface of one end, and a C-shaped locking member 80 that can be elastically deformed is inserted into the recess 81.
can be locked in a predetermined manner. (Then,
As can be easily understood from FIG. 1, the peripheral edge of the armature 24 comes into contact with the locking member 80, thereby reliably preventing the armature 24 from coming off the field 28.

Biasing means are further interposed between the electromagnetic means 28 and the armature 24. In the specific example, the biasing means comprises a resilient biasing spring member 82 interposed between the armature 24 and the bottom of a spring receiving recess 84 provided in the inner wall 74 over which the sleeve member 36 mounted on the field 32 is fitted. has been done.

The elastic biasing 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 illustrated electromagnetic means 28 includes a cylindrical field 32, a coil assembly 34, and a protection member 86. The field 32 is a substantially circular end wall 8
8, and a circular opening is formed in the center of the end wall 88. A cylindrical outer wall 72 and an inner wall 74 extending on one side (right side in FIG. 4) are provided on the outer peripheral edge and inner peripheral edge of the end wall 88, and one end surface of the field 32
゛ is open. In particular embodiments, the outer wall 72 extends beyond one end of the inner wall 74 to one side. In the field 32, as clearly shown in FIG. 5, the outer wall 72 is provided with a mounting aperture 90 which is open to said one end surface of the field 32. In the illustrated embodiment, the mounting aperture 90 is substantially rectangular and extends from an opening in one end face of the field 32 toward the other end to the inner surface of the end wall 88 (FIGS. 4 and 5). Field 3 shown
In No. 2, shoulder portions 94a are further provided in the portions of the outer wall 72 that define the mounting opening 90, more specifically, in the opposing portions 92a and 92b that define the side surfaces of the mounting opening 90.
and 94b are provided (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 in the mounting direction of a protection member 86, which will be described later. Moreover, the sleeve member 36 is attached to the inner surface of the inner wall 74 by press fitting. The sleeve member 36 extends somewhat beyond one end of the inner wall 74 to one side, as shown in FIG. 4 (FIG. 4).

As described above, the protruding portion of the sleeve member 36 has the following features:
The armature 24 is rotatably mounted (FIG. 1). On the other hand, one end of the outer wall 72 protrudes somewhat further to the one side than the one end of the sleeve member 36, and an annular recess 81 in which a locking member 80 is locked is formed on the inner circumferential surface of the projecting end. is formed (Figure 4). Further, rotation prevention receiving portions 78 (three in the specific example) are formed on the outer wall 72 and open to the one end surface, and each rotation prevention receiving portion 78 is formed on the inner wall 74.
It extends to one end surface toward the other end side. Furthermore, an annular spring housing recess 84 is provided on the inner circumference of the inner wall 74 of the field 32, and a protrusion 38 in which the locking recess 40 is formed is provided on the outer circumferential surface of the outer wall 72. . The field 32 having such a configuration can be easily formed integrally by sintering, as can be seen from FIGS. 4 and 5, by attaching the sleeve member 36 to the inner wall 74 of the sintered field 32. By press-fitting, it is assembled into the form shown in FIG.

The coil assembly 34 also includes a bobbin 96 and a bobbin 96.
It includes a coil body 98 wound around.

The illustrated bobbin 96 includes a hollow sleeve portion 100 and an annular flange portion 102a provided at both ends of the sleeve portion 100.
and 102b, and in a specific example, is formed by integral molding of synthetic resin or ceramic. 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 wound around both the flange portions 102a and 1.
02b. In a specific example,
As shown in FIG. 5, a coil body 98 wound around a bobbin 96
is further covered with a band-shaped sealing member 104, with only both ends thereof extending outward from the sealing member 104. As will be described later, lead wires 106a and 106b constituting a connecting wire section are connected to both ends of the coil body 98, and by connecting the lead wires 106a and 106b, the coil body 98 is assembled into the configuration shown in FIG. In the coil body 98 described above, it is preferable to provide a positioning projection 108 projecting radially outward on the peripheral edge of at least one of the flange portions 102a and 102b. It is more preferable to provide the

Furthermore, in the illustrated example in which the protective member 86 has a main body 110, the main body 110 has a rectangular cross section;
A through hole 112 that penetrates in the axial direction is formed in the center thereof, and a locking protrusion 114 that projects outward is provided on both surfaces (opposed surfaces) of one end thereof. The protective member 86 having such a configuration can be formed by integrally molding synthetic resin or ceramic, for example.

The electromagnetic means 28 described above can be constructed in the form B shown in FIGS. 3 and 4 (and thus in the form B shown in FIGS. It is assembled into form B) also shown in FIG.

That is, first, for example, a vinyl electric wire is cut to a predetermined length to form a pair of lead wires 106a and 106b, and then connected to one end of the cut lead wires 106a and 106b, respectively, as shown in FIG. Terminals 116a and 116b
Crimp. During this crimping, the lead wires 106a and 10
Since nothing is connected to both ends of the terminal 6b, the connection terminals 116a and 116b can be easily and simply crimped, and this makes it possible to easily automate the crimping process.

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. In this way, a coil assembly 34 having the form shown in FIG. 5 is assembled.

After that, the lead wire 106a connected to the coil body 98
and 106b (constituting the contact wire portion of the coil body 98) are inserted into the through hole 112 formed in the protection member 86 to position the protection member 86 at the other ends of the lead wires 106a and 106b.

The protective member 86 is then installed in the mounting opening 90 formed in the outer wall 72 of the field 32, and the coil assembly 34 is installed between the outer wall 72 and the inner wall 74 of the field 32 as desired. During such installation, the protective member 8
6, on the one end surface side of the field 32, the main body 110 of the protection member 112 and the opening of the attachment opening 90 formed in the field 32 (the opening present on the one end surface of the field 32) are aligned. At the same time, the engaging protrusion 114 of the protection member 86 and the shoulders 94a and 94b provided on the field 32 are aligned. In the coil assembly 34, the bobbin 96 is positioned between the outer wall 72 and the inner wall 74 of the field 32 on the one end surface side of the field 32, and the positioning protrusion 108 provided on the bobbin 96 is positioned. Shoulder 94 of field 32
Located between a and 94b. Then, the protective member 86 is inserted into the mounting opening 90 through the opening in the mounting direction, that is, to the left in FIG. 4, and at the same time, the bobbin 96 is opened in the mounting direction, that is, to the left in FIG. The outer wall 7 of the field 32 through one end surface
2 and the inner wall 74 and fixed. The bobbin 96 can be fixed to the field 32 by, for example, providing a fixing protrusion (not shown) that protrudes somewhat outward in the radial direction on the outer surface of the inner wall 74 of the field 32 (the surface facing the outer wall 72). It is preferable to press fit the bobbin 96 into the inner wall 74 where the fixing protrusion is present, and by doing so, the bobbin 96 can be easily fixed without requiring a special tool.

The fixing protrusion (not shown) preferably has a shape in which the amount of radially outward protrusion gradually increases in the mounting direction of the bobbin 96, and instead of the outer surface of the inner wall 74, the fixing protrusion (not shown) It can also be provided on the inner peripheral surface of the portion 100. When the bobbin 96 is installed as described above, the results shown in Figs. 3 and 4 are shown.
Assembled as shown. That is, the main body 110 of the protection member 86 is located within the mounting opening 90 of the field 32 and projects outwardly of the outer wall 72 through the mounting opening 90, and the lead wire 1
40a and 140b are reliably prevented from coming into direct contact with the edges defining the mounting opening 90.

Further, the movement of the protective member 86 radially outward relative to the field 32 causes the locking protrusion 114 thereof to move outwardly in the radial direction relative to the field 32.
This prevents the protective member 86 from coming off through the mounting opening 90. In addition, in this assembled state, the positioning protrusion 108 provided on the flange portion 102a of the bobbin 96 is located on the one end surface side of the protective member 86 and straddles between the shoulder portions 94a and 94b. 86 through the opening of the mounting opening 90 is reliably prevented, and the protective member 86 is
It is securely attached to 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 surface side of the field 32, the positioning protrusion 108 is Positioning to prevent rotation, positioning to position the other ends of the lead wires 106a and 106b in the mounting opening 90, and preventing the protection member 86 from being pulled out through the mounting opening 90, but the other end of the field Flange 102 located on the side
When provided in b, the only effect is the positioning described above when mounting the bobbin 96.

In the embodiment, the sleeve member 36 of the electromagnetic means 28 is then
After the elastic biasing spring member 82 is fitted to the armature 24
is installed as required, and then the locking member 80 (first
) is locked. Thus, the electromagnetic means 28, the resilient biasing spring member 82 and the armature 24 constitute an electromagnetic assembly;
When assembling the electromagnetic control spring clutch mechanism 16, which will be described later, the small diameter portion 10a of the support shaft 10 is assembled in the state of the electromagnetic assembly.
be assembled into.

In the electromagnetic means 28 configured as described above, when the protective member 86 is attached to the lead wires 106a and 106b of the coil body 98, the protective member 86 is connected to the field 3.
It can be mounted as required in the field 32 through the open opening of the mounting opening 9° formed in 2.

Therefore, the conventional one-step process for connecting line parts (conventionally, a hole was formed in the outer wall of the field and the connecting line part was led out through the hole) and the press-fitting process for the protection member (conventionally, a hole was formed in the outer wall of the field, and the connecting line part was led out to the outside). This eliminates the need to press-fit the protective member attached to the connection line into the hole formed in the wall, making assembly easier and simpler, and is also suitable for automation of assembly.

Again, mainly referring to FIG. 1, the electromagnetic control spring clutch mechanism 16 of the specific example is constructed in the first form 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 using the first form, as understood from FIG. 1, the electromagnetic assembly (electromagnetic means 2
8, comprising an elastic biasing spring member 82 and an armature 24), and then the pin member 62 is installed in the pin hole 60 of the small diameter portion 10a.
(Therefore, when installed as required, both ends thereof will protrude somewhat from the small diameter section 10a).Next, with the rotating member 26 attached to the small diameter section 54 of the second boss member 52, The second boss member 52 is attached, and both ends of the pin member 62 are positioned in one of the bottle receiving portions defined by the notch 58 formed in the small diameter portion of the second boss member 52. Further, the other end of the coil spring means 30 is fitted into the large diameter portion 56 of the second boss member 52, and the other end 30b is locked in a notch 68 formed in the rotating member 26. Then,
The gear 22 with the first boss member 44 attached thereto is mounted, the first boss member 44 is positioned within one end of the coil spring means 30, and the one end 30a is connected to the annular protrusion 4 of the gear 22.
It is locked in the notch 66 formed in 2. After that,
A locking member 20 is locked to the other end (the right end in FIG. 1) of the small diameter portion 10a. In this way, various components are assembled to the small diameter portion 10a of the support shaft 10 as shown in FIG.
It is used in the form of

In this first form, as shown in FIG.
, elastic biasing spring member 82, armature 24, rotating member 2
6. A coil spring means 30 and a gear 22 are arranged, and a rotating member 26 is located on one side (the right side in FIG. 1) of the armature 24 opposite to this one side, and the armature 24
The electromagnetic means 28 is located on the other side (left side in FIG. 1), and an elastic biasing spring member 82 interposed between the electromagnetic means 28 and the armature 24 acts on the armature 24 to elastically bias it toward the rotating member 26. to force the target. In this type of clutch mechanism 16, as in a specific example, an armature 24
It is preferable to arrange a friction member 120 having excellent wear resistance on the surface of the rotating member 26 against which the armature 24 is pressed (the surface facing one side of the armature 24 and the left surface in FIG. 1). As such a friction member 120, for example, polyslider tape (trade name sold by Asahi Polyslider Seisakusho Co., Ltd.) can be suitably used.

When the electromagnetic means 28 is deenergized in the first configuration, the armature 24 is elastically pressed against the rotating member 26 by the action of the elastic biasing spring member 82, and the armature 24 and the rotating member 26 push against the friction member 120. Connected via. Therefore, 1! When the gear 22 is rotated in the direction indicated by the arrow 50 (FIG. 2) in the deenergized state of the magnetic means 28, the rotating member 26 will also be rotated in the same direction via the coil spring means 30. On the other hand, at this time, since the armature 24 and the rotating member 26 are in a connected state via the friction member 120, the rotation of the armature 24 is restrained, and a force is applied to the rotating member 26 to prevent the rotation. acts. When such a rotation prevention force acts,
This force creates a relative speed difference between the gear 22 and the rotating member 26, which causes the coil spring means 30 to
is contracted.

In this way, 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 the support shaft 10 is connected to the bottle member 62, the second boss member 52, and the coil spring. Drivenly connected to gear 22 via means 30 and first boss member 44 .

In this way, the rotational driving force of the gear 22 is transmitted to the support shaft 10, and therefore the conveyance roller 1 attached to the support shaft 10 is transmitted to the support shaft 10.
2 is rotated in the direction shown by arrow 50 as gear 22 rotates. In this state, the rotating member 26 rotates relative to the armature 24 while sliding one side thereof, and the coil spring means 30 is maintained in the contracted state described above. Incidentally, as is easily understood from the above description, the friction member 120 may be any member that can generate a rotation-preventing force sufficient to contract the coil spring means 30, and is therefore made of a material with a relatively low coefficient of friction. be able to.

On the other hand, when the electromagnetic means 28 is energized and biased in the first configuration, 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. The armature 24 and the rotating member 26 are released from the above connection state.

When the above-mentioned connection state is released, the rotating member 26 becomes rotatable, so that the rotating member 26 moves along the arrow 5 due to the elastic force of the coil spring means 30 stored during the above-mentioned driving force transmission.
The coil spring means 30 is expanded by being slightly rotated in a direction opposite to the direction indicated by .

In this way, the first boss member 44 and the second boss member 52
The connection by the coil spring means 30 with the large diameter portion 56 of is released, and thus the driving connection between the gear 22 and the support shaft lO is released. When the electromagnetic means 28 is energized, the gear 2
2, the rotating member 26 only rotates via the first boss member 44 and the coil spring means 30,
The support shaft 10 and therefore the conveyance roller 12 do not rotate.

The electromagnetic control spring clutch mechanism 16 described above can be further utilized in a second form shown in FIG. 7 by attaching various components to the small diameter portion 10a of the support shaft IO as follows. Referring to FIG. 7, when the gear 22 is used in the second embodiment, first the gear 22 is attached to the small diameter portion 10a of the support shaft IO.
The gear 22 is mounted so that the first boss member 44 mounted thereon extends to the right in FIG. 7, that is, toward the other end of the small diameter portion 10a), and then A pin member 62 is inserted into the bottle hole 60 (FIG. 2). Next, one end of the coil spring means 30 is fitted onto the first boss member 44, and the one end 30a is inserted into the notch 66 formed in the annular projection 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 the second boss member 52 is attached, the rotating member 26 is attached to the small diameter portion 54). The member 52 is attached to the small diameter portion 10a, and the large diameter portion 56 is positioned within the other end of the coil spring means 30.
Both ends of the pin member 62 are engaged with the engagement recesses 64 (defining the other bottle receiving part) formed in the rotary member 26, and then the other end 30b of the coil spring means 30 is inserted into the notch formed in the rotating member 26. Insert into 68. Next, the electric 1 assembly (the assembly including the electromagnetic means 28, the armature 24, etc.) is attached to the small diameter portion 1.
0a so that the armature 24 faces the rotating member 26, and then the locking member 20 is locked to the other end of the small diameter portion 10a. Thus, the various components
As shown in the figure, it is assembled to the small diameter portion 10a of the support shaft 10 and used in the second form.

In this second embodiment, the gear 22 and the coil spring means 3 are sequentially moved from one end of the small diameter portion 10a to the other end.
0, the rotating member 26, the armature 24, the elastic biasing spring member 82, and the electromagnetic means 28 are arranged, and the rotating member 26 is placed on one side (the left side in FIG. 7) of the armature 24, as in the first embodiment. 1! located opposite to each other, and on the other side of the amateur 24 (the right side in Fig. 7)! Magnetic means 2
8 is located, and an elastic biasing spring member 82 is made of a composite material between them.
causes the armature 24 to be elastically pressed against the rotating member 26.

When used in the second form, substantially the same effects as in the first form can be achieved. That is, when the electromagnetic means 28 is deenergized, the action of the elastic biasing spring member 82 causes the rotating member 26 and the armature 2
4 are in a connected state via the friction member 120, the coil spring means 30 is contracted as described above, and the large diameter portions 56 of the first boss member 44 and the second boss member 52 are connected to each other through the friction member 120. 30, and thus the rotational driving force of the gear 22 is transmitted to the support shaft 10. On the other hand, when the electromagnetic means 28 is energized, 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 Coil spring means 30 of member 44 and second boss member 52
The connection between the gear 22 and the support shaft 10 is thus released.
The connection state with is canceled.

As shown above, the specific example tM! The AtB spring clutch mechanism can be used in either of two forms by simply changing the assembly order, and can be used in a wide range of applications without changing the design.

Although an example of an electromagnetically controlled spring clutch mechanism configured according to the present invention has been described above, the present invention is not limited to such a specific example, and various changes and modifications can be made without departing from the scope of the present invention. It is possible.

<Effects of the Invention> As detailed above, in the electromagnetically controlled spring clutch mechanism according to the present invention, driving force is transmitted when the electromagnetic means is deenergized (in other words, when it is in a non-energized state); The structure is such that the transmission of driving force is cut off when the motor is energized (in other words, energized), and therefore, when applied to devices that require constant transmission of driving force, power consumption is significantly reduced. You can force it.

[Brief explanation of drawings]

FIG. 1 is a partially cross-sectional view showing an example in which a first embodiment of a magnetically controlled spring clutch mechanism constructed according to the present invention is applied to a conveyance roller. FIG. 2 is an exploded perspective view of the electromagnetic control spring clutch mechanism shown in FIG. 1. 3 is a partially cutaway front view showing the electromagnetic means in the electromagnetically controlled spring clutch mechanism of FIG. 1; FIG. FIG. 4 is a sectional view taken along the TV-TV line in FIG. 3. FIG. 5 is an exploded perspective view showing the electromagnetic means shown in FIG. 3 in an exploded manner. What does Fig. 6 show when used in the first form? FIG. 7 is a partial cross-sectional view of the energized state of the IT magnetic means.
FIG. 2 is a partially cross-sectional view showing an example in which the electromagnetic control spring clutch mechanism of FIG. 1 is applied in a second form; 10... Support shaft (shaft member) 22... Gear (input rotating element) 24... Armature 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 patent applicant Sanda Kogyo Co., Ltd., agent Patent attorney Jun Ono 1, Tadaaki Kishimoto 1', i, ゛1 t2 Fig. 4 ■) Fig. 5 Fig. 6

Claims (1)

[Scope of Claims] 1. A rotatably mounted shaft member, an input rotating element rotatably mounted relative to the shaft member, and a shaft member mounted movably in the axial direction of the shaft member. a rotary member mounted on one side of the armature so as to be rotatable relative to the shaft member; a biasing means for biasing the armature in a direction approaching the rotary member; electromagnetic means for magnetically attracting the armature away from the rotating member against the biasing action of the biasing means; one end connected to the input rotating element and the other end connected to the rotating member; coil spring means, wherein when the electromagnetic means is deenergized, the one side of the armature is pressed against the opposite side of the rotary member by the action of the biasing means, thereby preventing rotation acting on the rotary member. The force causes the coiled spring means to contract, thus transmitting the rotational driving force of the input rotary element to the shaft member via the coiled spring means, while when the electromagnetic means is energized, the armature An electromagnetically controlled spring clutch mechanism, characterized in that the means is separated from the rotary member by the magnetic attraction action of the means and does not substantially act on the rotary member, thus stopping transmission of the rotational driving force of the input rotary element. 2. The electromagnetic control spring clutch mechanism according to claim 1, wherein a friction member having wear resistance is provided on a surface of the rotating member facing the armature. 3. The electromagnetic means is disposed on the other side of the armature, and the biasing means includes an elastic biasing spring member interposed between the electromagnetic means and the armature, and the elastic biasing spring member biases the armature. The electromagnetically controlled spring clutch mechanism according to claim 1 or 2, wherein the clutch mechanism is elastically biased in a direction approaching the rotating member. 4. The armature is provided with a protrusion projecting outward in the radial direction, and the electromagnetic means is provided with a rotation prevention receiving part extending in the axial direction of the shaft member, and the protrusion is provided within the rotation prevention receiving part. The electromagnetically controlled spring clutch mechanism according to claim 3, wherein the clutch mechanism is movably received in the axial direction of the shaft member. 5. Further comprising a first boss member that rotates together with the input rotating element, and a second boss member that is attached to the shaft member adjacent to the first boss member and rotates integrally therewith, The coil spring means is fitted over the first boss member and the second boss member, and extends from the one end connected to the input rotating element to the other end connected to the input rotating element. When the input rotating element and the rotating member are rotated relative to each other as the rotating element rotates in a predetermined direction, the shaft member is wound in a contracting direction, and the shaft member constitutes an output rotating element. An electromagnetically controlled spring clutch mechanism according to any one of claims 1 to 4. 6. The first boss member is attached to the input rotating element, the second boss member is attached to the shaft member via a pin member, and the shaft member is attached to the shaft member in relation to the pin member. A pin hole into which a member is attached is formed, and pin receiving portions are provided at both ends of the second boss member, and the electromagnetic means is sequentially inserted from one end of the shaft member toward the other end. , the biasing means, the armature, the rotating member, the coil spring means, and the input rotating element are arranged, the pin member installed in the pin hole of the shaft member is connected to the second boss member. The input rotating element, the coil spring means, the rotating member, and the amateur are engaged with the pin receiving portion provided at one end, and are sequentially arranged from the one end side to the other end side of the shaft member. , when the biasing means and the electromagnetic means are arranged, the pin member installed in the pin hole of the shaft member engages with the pin receiving portion provided at the other end of the second boss member. The electromagnetically controlled spring clutch mechanism according to claim 5, which is adapted to the above. 7. The electromagnetic means has a cylindrical field with one end open, a bobbin and a coil body wound around the bobbin, and a coil assembly installed in the field, and a connection between the coil body. a protective member attached to the wire portion, a mounting opening opened to the one end surface is formed in the outer wall of the field, and the protection member is mounted to the mounting opening through the one end surface. An electromagnetically controlled spring clutch mechanism according to any one of claims 1 to 6. 8. A shoulder extending in the mounting direction of the protective member is formed at a portion of the field that defines the mounting opening, and the protective member extends outwardly from the outer wall of the field through the mounting opening. 8. The electromagnetically controlled spring clutch mechanism according to claim 7, comprising a main body projecting from above and an engagement protrusion that engages with the shoulder. 9. 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 projection. The electromagnetically controlled spring clutch mechanism according to item 8. 10. The electromagnetic control spring clutch mechanism according to claim 9, wherein the positioning projection is provided on the flange portion located on the one end surface side of the field and received in the shoulder portion. 11. The inner wall of the field or the bobbin of the coil assembly is provided with a fixing protrusion for fixing the bobbin, according to any one of claims 7 to 10. Electromagnetic control spring clutch mechanism.