JPH08232984A - Electromagnetic control spring clutch mechanism - Google Patents

Abstract

PURPOSE: To use an electromagnetic control spring clutch mechanism in two kinds of forms only by way of changing assembly order by assembling a pin member installed on a shaft member on pin receiving parts provided on both end parts of a boss member by way of engaging it with it selectively. CONSTITUTION: A pin member 66 is installed on a shaft member 10, pin receiving parts 62, 68 are provided on both end parts of a boss member 54, and in case of sequentially installing an electromagnetic means 28, a unit assembly body and a gear 20 from one end side of the shaft member 10 toward the other end side, the pin member 66 installed on the shaft member 10 is engaged with the pin receiving part 62 on the one end of the boss member 54. On the other hand, in case of sequentially installing the gear 20, the unit assembly body and the electromagnetic means 28 from the one end side of the shaft member 10, the pin member 66 installed on the shaft member 10 is engaged with the pin receiving part 68 on the other end of the boss member 54. In these two forms, when the electromagnetic means 28 is energized, the boss members 44 and 54 are connected to each other through a coil spring means 100, and revolving force from the gear 20 is transmitted to the support shaft 10 through the coil spring means 100, the pin member 66, etc., in the same way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetically controlled spring clutch mechanism.

[0002]

2. Description of the Related Art Conventionally, an electromagnetically controlled spring clutch mechanism using a coil spring has been used to selectively transmit a driving force of an input rotary element that is rotationally driven. As this type of electromagnetically controlled spring clutch mechanism, for example, the one disclosed in Japanese Patent Laid-Open No. 59-175633 can be cited. Such an electromagnetically controlled spring clutch mechanism includes a shaft member to which an input rotary element is fixed, A rotor that is rotated integrally with the shaft member, an armature disposed on one side of the rotor, and a support member that is rotatably mounted on the shaft member.
A biasing spring member disposed between the armature and the support member, 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,
Coil spring means having one end connected to the support member is provided, and the driving force from the input rotary element is transmitted by contraction of the coil spring means.

[0003]

In the electromagnetically controlled spring clutch mechanism as described above, the electromagnetic means, the rotor, the armature assembly, etc. are constructed separately, so that, for example, the timing of the electrostatic copying machine is used. In the case of applying to the control of rollers, these assembling must be done at the time of assembling the electrostatic copying machine, and there is a problem that the number of assembling steps of the copying machine increases.

The present invention has been made in view of the above facts, and its main technical problem is that the electromagnetic control spring can be made into two types by remarkably easy assembling and changing the assembling order. It is to provide a clutch mechanism.

[0005]

In order to solve the above main technical problems, according to the present invention, a shaft member rotatably mounted, and an input rotary element rotatably mounted on the shaft member. A first boss member that rotates integrally with the input rotary element, and a unit assembly that is mounted on the shaft member,
A second boss member disposed adjacent to the first boss member and rotating integrally with the shaft member via a pin member; a rotor fixed to one end of the second boss member; An armature facing one surface side, a support member rotatably mounted on the second boss member, and a direction arranged between the support member and the armature to separate the armature from the one surface of the rotor. A unit assembly including a biasing spring member that elastically biases the elastic biasing member, and an elastic biasing of the elastic biasing spring when the shaft member is mounted and biased so as to face the other surface side of the rotor of the unit assembly. Electromagnetic means for magnetically attracting the amateur to the one side of the rotor against action;
From the one end connected to the unit assembly to the other end connected to the input rotary element, the input rotation is fitted over the first boss member and the other end of the second boss member. Coil shaft means wound in a direction in which the unit assembly and the input element are contracted when the unit assembly and the input element are relatively rotated in association with the rotation of the element in a predetermined direction. Has a single pin hole into which the pin member is mounted, and pin receiving portions are provided at both end portions of the second boss member, and from one end side to the other end side of the shaft member. When the electromagnetic means, the unit assembly and the input rotary element are sequentially mounted, the pin member mounted in the pin hole of the shaft member is the second member.
Of the boss member is engaged with the pin receiving portion provided on the one end of the boss member, and on the other hand, the input rotary element, the unit assembly and the electromagnetic means are sequentially mounted from the one end side of the shaft member toward the other end side thereof. In this case, the pin member mounted in the pin hole of the shaft member engages with the pin receiving portion provided at the other end portion of the second boss member. A control spring clutch mechanism is provided.

[0006]

DETAILED DESCRIPTION OF THE INVENTION An electromagnetically controlled spring clutch mechanism constructed according to the present invention will be described below with reference to the accompanying drawings. Although the electromagnetic control spring clutch mechanism is applied to the timing roller of the electrostatic copying machine in the illustrated embodiment, the present invention is not limited to this and may be applied to control of rotation of other various elements. it can.

FIG. 1 shows a timing roller of an electrostatic copying machine.
1, a vertical front substrate 2 and a vertical rear substrate 4 are arranged at intervals in the front-rear direction (left-right direction in FIG. 1).
Bearing members 6 and 8 are provided between the vertical front substrate 2 and the vertical rear substrate 4.
A support shaft 10 (constituting a shaft member) is rotatably mounted via the, and a timing roller 12 is mounted at an intermediate portion of the support shaft 10. One end of the support shaft 10 penetrates the vertical front substrate 2 and protrudes slightly forward (to the left in the nest 1),
The locking member 1 is provided on the outside portion of the bearing member 6 of the front protrusion.
4 is installed. Further, the other end of the support shaft 10 penetrates the vertical rear substrate 4 and projects rearward (rightward in FIG. 1), and a locking member 16 is attached to an outer portion of the bearing member 8 of the rear projecting portion. There is. An electromagnetically controlled spring clutch mechanism, generally designated by reference numeral 18, is arranged on the rear projection of the support shaft 10.

Referring to FIG. 2 together with FIG. 1, the electromagnetically controlled spring clutch mechanism will be described. The illustrated electromagnetically controlled spring clutch mechanism 18 includes an input rotary element, a unit assembly 26 including a rotor 22, an armature 24 and the like, and an electromagnetic means 28. The electromagnetically controlled spring clutch mechanism 18 in the illustrated embodiment has two forms, namely, the rear side of the support shaft 10, by changing the assembling order of the input rotary element, the unit assembly 26 and the electromagnetic means 28, as will be described later in detail. A first mode in which the electromagnetic means 28, the unit assembly 26, and the input rotary element are sequentially arranged from the one end side to the other end side (from left to right in FIG. 1) of the small diameter portion 10a formed at the end. (The form shown in FIGS. 1 to 4) and the second form (FIG. 6) in which the input rotary element, the unit assembly 26 and the electromagnetic means 28 are sequentially arranged from the one end side to the other end side in the small diameter portion 10a. The form shown) can be used.

Next, the structure of the electromagnetically controlled spring clutch mechanism 18 will be described mainly with reference to FIG.
It is used in the first form). The electromagnetic means 28 arranged at one end of the small diameter portion 10 a of the support shaft 10 has a field core 30 and an electromagnetic coil 32 mounted on the field core 30, and the field core 30 is a sleeve member 34.
It is rotatably attached to the small-diameter portion 10a via the (see FIG. 1). The outer peripheral surface of the field core 30 has a locking portion 36.
And a notch 38 is formed in the locking portion 36. On the other hand, the vertical rear substrate 4 is provided with a locking projection 40 by bending a part thereof backward, and the locking projection 40 is locked in the notch 38 of the locking portion 36. (See Figure 1). Therefore, the electromagnetic means 28 is not rotated by the rotation of the support shaft 10 described later.

An input rotary element, which may be composed of, for example, a gear 20, is arranged at the other end of the small diameter portion 10a of the support shaft 10 and is rotatably mounted on the small diameter portion 10a. An annular boss portion 42 is integrally provided on one surface (left surface in FIGS. 1 and 2) of the gear 20, and a cylindrical first boss member 44 is mounted in the boss portion. In the illustrated embodiment, the first boss member 44 is
By inserting the protrusion 48 provided on the end face into the through hole 46 formed in the side surface of the gear 20, the gear 20
It is mounted so as to rotate together with. The first boss member 44 extends forward in the front-rear direction toward a second boss member described later. The first boss member 44 is the gear 2
It is also possible to form it integrally with 0. Although not shown, the gear 20 is drivingly connected to a drive source such as an electric motor via an appropriate gear mechanism or the like, and is rotated in a predetermined direction by the drive source. Gear 2 of small diameter portion 10a of support shaft 10
A locking member 49 is mounted on the outer side (the right side in FIG. 1) of the mounting portion 0 to prevent the gear 20 and the like from coming off further.

Further, in the illustrated embodiment, the unit assembly 26 arranged between the electromagnetic means 28 and the gear 20 in the middle portion of the small diameter portion 10a of the support shaft 10 includes the rotor 22, the armature 24 and the bias. It includes a spring member 50, a support member 52, and a second boss member 54, which are unitized to form one assembly element. Referring also to FIG. 3, the second boss member 54 has a small diameter portion 56 provided at one end portion (left side in FIGS. 1 to 3) and the other end portion (right side in FIGS. 1 to 3). Large-diameter portion 58 provided in
And a medium-diameter portion 60 provided at an intermediate portion thereof. The small diameter portion 56 of the second boss member 54 is formed with a pair of cutouts 62 that define the pin receiving portion, and the cutouts 62 are formed so as to penetrate the small diameter portion 10a of the support shaft 10. By engaging both ends of the pin member 66 mounted in the pin hole 64 (see FIG. 2), the second boss member 54 is mounted on the small diameter portion 10a so as to rotate integrally therewith ( 1 and 4). In the illustrated embodiment, a pair of recesses 68 defining a pin receiving portion is also formed at the other end of the second boss member 54. The pair of recesses 68 are used when the illustrated electromagnetically controlled spring clutch mechanism 18 is used in the second form, that is, the form shown in FIG. 6, as will be described later. In such a case, the pair of recesses 68 is used.
Both ends of the pin member 66 mounted in the pin hole 64 are engaged therein. Therefore, the recess 68 can be omitted when using only the first form (FIGS. 1 to 4).
The cutout 62 can be omitted when only the second form (FIG. 6) is used.

In the illustrated embodiment, the rotor 22 has an annular substrate 70, an annular portion 72 located outside the annular substrate 70, and a connecting portion 74 connecting the annular substrate 70 and the annular portion 72. It is composed of plates. The rotor 22 is fixed at one end thereof by press-fitting the annular substrate 70 into the small diameter portion 56 of the second boss member 54,
It is rotated integrally with the second boss member 54, and thus the support shaft 10. In the specific example, in association with the rotor 22 being fixed to the small diameter portion 56 of the second boss member 54, a pair of recesses 76 is also formed on the inner peripheral edge of the annular substrate 70 of the rotor 22. The concave portion 76 formed in the rotor 22 is the second
4 cooperates with the notch 62 formed in the boss member 54 to define the pin receiving portion. As shown in FIG. 4, both ends of the pin member 66 attached to the small diameter portion 10a have the notch 62 and the notch 62. The rotor 22 is engaged with the recess 76 (hence, when fixing the rotor 22 to the small diameter portion 56 of the second boss member 54,
The concave portion 76 and the notch 62 of the small diameter portion 56 are aligned and press-fitted). With this structure, the rotor 22 and the second
Even when the small diameter portion 56 of the boss member 54 is relatively weakly pressed in, the rotor 22 is reliably rotated integrally with the support shaft 10 via the pin member 66.

The support member 52 is composed of a short tubular member and is rotatably mounted on the middle diameter portion 60 of the second boss member 54. An annular flange 77 is provided on the inner peripheral edge of one end surface (left surface in FIGS. 1 to 3) of the support member 52. The support member 52 is preferably made of lightweight plastic. The armature 24, which faces the one surface (the right surface in FIGS. 1 to 3) of the rotor 22, is formed of an annular plate having an outer diameter substantially the same as the outer diameter of the annular portion 72 of the rotor, and is biased. Spring member 50
It is attached to the support member 52 through. To further explain, the bias spring member 50 is mounted on the annular flange 77 of the support member 52, and the annular central portion 78 thereof is attached to the support member 52.
It is fixed to one end surface of the as described below. The illustrated biasing spring member 50 has a plurality (three in the illustrated embodiment) of protrusions 80 extending outward from the annular central portion 78 in a sickle shape, and the free ends of each of the plurality of protrusions 80. Is one side of the amateur 24 (the side opposite to the side facing the rotor 22)
Is fixed by a fixing member 84 such as a rivet.
The biasing spring member 50 acts to elastically bias the armature 24 in a direction away from one surface of the rotor 22. In the illustrated embodiment, the bias spring member 50 is secured to the support member 52 as follows. The illustrated unit assembly 26 further includes a plate-shaped spring fixing member. The illustrated spring fixing member is an annular plate member 86 that substantially corresponds to the shape of the annular central portion 78 of the biasing spring member 50.
It consists of A plurality of (three in the illustrated embodiment) locking projections 88 are provided on the periphery of the plate member 86 at a circumferential interval by bending a part thereof. On the other hand, the bias spring member 50
A plurality (three in the illustrated embodiment) of insertion holes 9 are provided in the annular central portion 78 of the corresponding to each of the locking projections 88.
0 is formed, and through holes 92 are formed in the support member 52 so as to correspond to the insertion holes 90. Therefore,
When the bias spring member 50 and the plate member 86 are mounted on the annular flange 77 of the support member 52, each locking projection 88 of the plate member 86 is inserted into the corresponding insertion hole 9 of the bias spring member 50.
0 and the through hole 92 of the support member 52
To project to the other side (projected as shown by the solid line in FIG. 5), and the projecting end of the locking projection 88 is deformed as required and locked to the other end of the support member 52. The annular central portion 78 of the bias spring member 50 is thereby fixed between the plate member 86 and the support member 52.

A unit assembly 26 according to the illustrated embodiment
In addition, a plurality of projections 94 are provided on one end surface of the support member 52 at intervals in the circumferential direction, and the annular central portion 78 of the biasing spring member 50 corresponds to the projections 94 in the circumferential direction. A plurality of openings 96 are formed at intervals to define the projection receiving portion. The tip side of each protrusion 94 penetrates through the opening 96 of the bias spring member 50, extends beyond the plate member 86 and the armature 24 and extends to one side of the rotor 22, and the tip thereof is in contact with or close to one side of the rotor 22. (See Figure 4). In the illustrated embodiment, the protrusion 94
In connection with the above-mentioned extension, arcuate notches 98 are formed in the peripheral edge of the plate member 86 corresponding to the openings 96. As such, each protrusion 94 is received in the opening 96 and the notch 98 and acts to transmit the driving force between the support member 52 and the bias spring member 50 (in other words, the support member 52 and the bias spring member). It acts to receive the Asian load generated between 50, that is, the load in the rotational direction) and to improve the responsiveness of the clutch mechanism 18 as described later. Clutch mechanism 1
To further improve the responsiveness of No. 8, as shown in a specific example,
It is preferable that the tip end side of the annular flange 77 of the support member 52 also projects beyond the bias spring member 50 and the plate member 86 so that the tip end thereof is brought into contact with or close to one surface of the rotor 22, and in the illustrated embodiment, the protrusion 94. And the front surface of the annular flange 77 define a substantially coplanar plane that is substantially parallel to one surface of the rotor 22 (see FIG. 4).

Coil spring means 100 covers the other end of the first boss member 44 mounted on the gear 20 as an input rotary element and the second boss member 54 of the unit assembly 26, that is, the large diameter portion 58. It is fitted. As shown in FIGS. 1 and 2, the large-diameter portion 58 of the second boss member 54 of the unit assembly 26 extends toward the first boss member 44, and the end surfaces of both boss members 44 and 54 are mutually opposed. Contacted or brought into close proximity. The outer diameter of the large diameter portion 58 of the second boss member 54 and the outer diameter of the first boss member 44 are substantially equal to each other, and the coil spring means 100 is the same as the large diameter portion 58 of the second boss member 54. It is fitted over both of the one boss member 44. In the illustrated embodiment, the coil spring means 100 is shown in FIG.
2 and the right-hand winding as viewed from the left side (therefore, the gear 20
Is rotated in the direction indicated by the arrow 102, a force that prevents the rotation of the support member 52 acts on the support member 52 to cause the support member 5 to rotate.
2 is wound in a direction in which it contracts when it is rotated relative to the gear 20. One end 100a of the coil spring means 100 is formed in a notch 104 formed in the other end of the support member 52 (in the illustrated embodiment, one of the plurality of notches 104 formed at intervals in the circumferential direction). It is connected to this by being inserted, and the other end 100
b is a notch 1 formed in the annular boss portion 42 of the gear 20.
06 (in the illustrated embodiment, any one of four notches 106 formed at intervals in the circumferential direction) to be connected thereto.

As will be readily understood from the above description, the clutch mechanism 18 has substantially four assembling elements, namely, the electromagnetic means 28, the unit assembly 26 and the coil spring means 1.
00 and gear 20. And these can be used as a 1st form by mounting these on the small diameter part 10a of the support shaft 10 as follows. That is, when used as the first embodiment, as understood from FIG. 1, first, the electromagnetic means 28 is mounted, and then the small diameter portion 10a.
The pin member 66 is attached to the pin hole 64 of the pin (the length of the pin member 66 is somewhat longer than the diameter of the small diameter portion 10a. Therefore, when the pin member 66 is attached as required, both ends thereof are small diameter portion 10a as shown in FIG. Of the second boss member 54 and the rotor 2 by mounting the unit assembly 26.
Both ends of the pin member 66 are engaged with the pin receiving portion defined by the second recess 76. Next, one end side of the coil spring means 100 is fitted into the large diameter portion 58 of the second boss member 54, and one end 100a thereof is cut out 104 of the support member 52.
To insert. Next, the gear 20 is mounted, the first boss member 44 mounted on the gear 20 is positioned on the inner diameter portion on the other end side of the coil spring means 100, and the other end 100b is formed on the annular boss portion 42 of the gear 20. Then, the locking member 49 is locked to the other end (the right end in FIG. 1) of the small diameter portion 10a. Thus, as shown in FIG. 1, the small diameter portion 10a of the support shaft 10 is assembled as required, the number of assembling steps is reduced in connection with the small number of assembling elements, and the assembly is easy and quick. . In the first embodiment, the electromagnetic coil 32 of the electromagnetic means 28 is arranged on the other side of the rotor 22, and the electromagnetic means 28 is prevented from rotating by the locking projection 40. Further, the second boss member 54 and the rotor 22 rotate integrally with the support shaft 10 via the pin member 66, and the support member 52 and the armature 24, the bias spring member 50, and the plate member 86 mounted on the support member 52 are the second member. The boss member 54 and thus the support shaft 10 are rotatable, and the gear 20 and the first boss member 44 attached thereto are rotatable with respect to the support shaft 10.

In the illustrated embodiment, the projecting end of the engaging projection 88 of the plate member 86 is deformed to engage with the other end of the support member 52. It is preferable that the form is as follows. That is, as shown in FIG. 5, the right end portion (the right end portion in FIGS. 1 to 3 and 5) of each through hole 92 of the support member 52 is expanded rightward, and the expanded portion 9 of the through hole 92 is expanded.
It is preferable that the deformed portion of the locking projection 88 is accommodated in the 2a, and by doing so, the support member 5 is formed.
2, the assembly element including the biasing spring member 50 and the plate member 86 can be downsized. In addition, when the expansion portion 92a is provided in the through hole 92 as in the illustrated embodiment,
It is desirable to make the tip of a pressure tool 108 such as a punch for deforming the locking projection 88 concave so that its tip surface 110 defines an arcuate surface. By doing so, the protruding portion of the locking projection 88 that is projected as shown by the solid line in FIG. 5 is deformed as required by the action of the pressure tool 108 as shown by the chain line in FIG. Can be securely locked to the expanded portion 92a of the through hole 92.

Next, mainly referring to FIG. 1, the operation and effect when the above-mentioned clutch mechanism 18 is used in the first mode will be described. First, the case where a current is supplied to the electromagnetic coil 32 will be described. When the electromagnetic means 28 is energized, the armature 24 resists the elastic biasing action of the biasing spring member 50 by the magnetic attraction force of the electromagnetic means 28. In FIG. 1, it moves to the left and is magnetically attracted to one surface of the rotor 22, so that the armature 24 and the rotor 22 are connected. The gear 20 is rotated in the direction shown by the arrow 102 (see FIG. 2), and the support member 52 is also rotated in the same direction via the coil spring means 100 (the bias spring member 50 and the armature 24 are integrally formed with the support member 52. Therefore, when the armature 24 and the rotor 22 are magnetically attracted and brought into a connected state, the support member 52 has a force that prevents the rotation because the support shaft 10 is stopped. To work. By doing so, a relative speed difference is generated between the gear 20 and the support member 52 due to the rotation preventing force, and the coil spring means 100 is contracted due to the speed difference. By doing so, the first boss member 44 and the second boss member 54 are connected via the coil spring means 100, and the support shaft 10 has the pin member 66, the second boss member 54, the coil spring means 100, and the first boss member 54. Via the boss member 44 of the gear 20
Is drivingly connected to. Thus, the rotational force of the gear 20 is transmitted to the support shaft 10, and the support shaft 10, and thus the timing roller 12 mounted on the support shaft 10, is rotated by the arrow 102 (see FIG. 2) of the gear 20.
It is rotated in association with the rotation in the direction indicated by the reference), and the copy paper is conveyed as required.

Next, the case where the supply of current to the electromagnetic coil 32 is stopped will be described. When the electromagnetic means 28 is deenergized, the elastic biasing action of the biasing spring member 50 causes the armature 24 to move to the right in FIG. Move to rotor 22
The armature 24 and rotor 22 are released from the above-mentioned connection state (that is, the armature 24 is returned to the position shown in FIG. 1 by the action of the biasing spring member 50). When the amateur 24 returns, the support member 52
Spring member 50 interposed between the armature 24 and the armature 24
Because of the elastic biasing action of the rotor 22, the rotor 22 is moved in a direction away from one surface of the rotor 22, so that the connection between the armature 24 and the rotor 22 is quickly released. Further, at the time of this return, the armature 24 is supported by the armature 24 due to the gap existing between the outer diameter of the middle diameter portion 60 of the second boss member 54 and the inner diameter of the support member 52.
Although it tends to be slightly inclined with respect to 0, in the specific example, the projection 94 provided on the one end surface of the support member 52 is brought into contact with or close to one surface of the rotor 22, so that FIG.
As can be easily understood from the above, when the armature 24 is slightly tilted, the front end surface of the protrusion 94 of the support member 52 is rotated by the rotor 2.
Since the armature 24 comes into contact with one surface of the rotor 22, the deterioration of the responsiveness due to the contact of the armature 24 with the one surface of the rotor 22 is effectively prevented. Further, in the illustrated embodiment, since the tip of the annular flange 77 of the support member 52 is also in contact with or close to one surface of the rotor 22, so-called rattling of the support member 52 itself can be reduced and the responsiveness deteriorates. Is further prevented. When the connection state between the armature 24 and the rotor 22 is released, the elastic force of the coil spring means 100 accumulated during the above-described drive transmission causes the support member 52 to move to the arrow 1 direction.
The coil spring means 1 is further rotated slightly in the direction indicated by 02.
00 is expanded. When the coil spring means 100 is expanded, the support member 52 is rotatably attached to the second boss member 54, and the bias spring member 50, the armature 24, and the plate member 86 are attached to the support member 52. Therefore, the support member 52 is easily and quickly rotated by the elastic force of the coil spring means 100 without receiving a large resistance. When the coil spring means 100 expands in this way, the connection between the first boss member 44 and the second boss member 54 by the coil spring means 100 is released, and thus the drive connection between the gear 20 and the support shaft 10 is released. . When the electromagnetic means 28 is deenergized, as will be easily understood, the support member 52, the bias spring member 50, and the armature 24 only rotate via the coil spring means 100 in association with the rotation of the gear 20. , Support shaft 10,
Therefore, the timing roller 12 does not rotate.

In the clutch mechanism 18 of the illustrated embodiment, the rotor 22, the armature 24, the biasing spring member 50, the support member 52, and the second boss member 54 are unitized, so that the clutch mechanism 18 is assembled as compared with the conventional one. The number of attachment elements can be significantly reduced and the particularly important distance between the rotor 22 and the armature 24 can be kept constant. Further, since the armature 24 is fixed to the one end surface of the support member 52 by the plate member 86 via the bias spring member 50, the plate member 86 is substantially evenly distributed over substantially the entire annular central portion 78 of the bias spring member 50. Such an annular central portion 7
8 can be reliably fixed between the plate member 86 and the support member 52, and the bias spring member 50 and the support member 52 can be fixed.
The assembly element including the plate member 86 and the plate member 86 can be downsized. Further, by doing so, the support member 5
It is also possible to prevent the armature 24 from being deformed when the armature 24 is fixed to the armature 2. Due to this, the responsiveness is also improved.

In the electromagnetically controlled spring clutch mechanism 18 as described above, the electromagnetic means 28, the unit assembly 26, the coil spring means 100, and the gear 20 are attached to the small diameter portion 10a of the support shaft 10 as follows. Can be used as a second form shown in FIG. That is, when used as the second mode, as understood from FIG. 6, first, the gear 20 is mounted (when mounting the gear 20, the first boss member 44 mounted on the gear 20 is the other end side, That is, the pin member 66 is attached to the pin hole 64 of the small diameter portion 10a. Next, the other end of the coil spring means 100 is fitted onto the first boss member 44 mounted on the gear 20, and the other end 100b is inserted into the notch 106 formed in the annular boss portion 42 of the gear 20. To do. After that, the unit assembly 26 is mounted (the mounting of the unit assembly 26 is performed so that the second boss member 54 faces the first boss member 44, that is, the rotor 22 is on the other side). ), The large diameter portion 58 of the second boss member 54 of the unit assembly 26 is positioned within the inner diameter portion of the one end side of the coil spring means 100, and the pin receiving portion defined by the recess 68 of the second boss member 54 is pinned. The both ends of the member 66 are engaged with each other, and one end 100a of the coil spring means 100 is inserted into the notch 104 formed in the support member 52 of the unit assembly 26. Next, the electromagnetic means 28 is mounted as required (the electromagnetic means 28 is similar to the first embodiment,
Notch 3 of locking portion 36 provided in field core 30
8 is locked to the locking projection 40 provided on the rear substrate 4), and the locking member 49 is locked to the other end of the small diameter portion 10a. Thus, as shown in FIG. 6, the small diameter portion 1 of the support shaft 10
0a is assembled as required.

Also in the above-described second embodiment, the electromagnetic coil 32 of the electromagnetic means 28 is arranged on the other side of the rotor 22 as in the first embodiment, and the electromagnetic means 28 is prevented from rotating by the locking projection 40. It Further, the second boss member 54 and the rotor 22 rotate integrally with the support shaft 10 via the pin member 66, and the support member 52 and the armature 24, the bias spring member 50, and the plate member 86 mounted on the support member 52 are the second member.
The boss member 54 and thus the support shaft 10 are rotatable, and the gear 20 and the first boss member 44 attached thereto are rotatable with respect to the support shaft 10. And
In the second mode, as can be easily understood by comparing FIGS. 1 and 6, the mounting position of the gear 20 is located closer to the vertical rear substrate 4 side than when used in the first mode. A certain amount of approach (that is, the mounting position of the gear 20 is the support shaft 1).
0 becomes one end of the small diameter portion 10a).

When used in the above-described second mode, substantially the same effect as in the case of using the first mode is achieved. That is, when the electromagnetic means 28 is urged, the coil spring means 100 contracts as described above, and the first boss member 44 and the second boss member 54 are connected via the coil spring means 100, thus The turning force from the gear 20 is transmitted to the support shaft 10 via the first boss member 44, the coil spring means 100, the second boss member 54, and the pin member 66. On the other hand, when the electromagnetic means 28 is deenergized, the contracted coil spring means 100 is expanded as described above, and the coil spring means 1 of the first boss member 44 and the second boss member 54 is expanded.
00, the drive connection between the gear 20 and the support shaft 10 is thus released. Then, at the time of deenergization, the support member 52, the bias spring member 50, and the armature 22 only rotate through the coil spring means 100 accompanying the rotation of the gear 20, and the support shaft 10 does not rotate. . As described above, the electromagnetically controlled spring clutch mechanism according to the illustrated embodiment can be used in two types with a relatively simple structure and only by changing the assembly order, and can be used in a wide range without changing the design. Can be used.

Although the electromagnetic control spring clutch mechanism according to the present invention has been described above based on the illustrated embodiment, the present invention is not limited to this embodiment, and various modifications can be made without departing from the scope of the present invention. Can be modified or modified.

[0025]

The electromagnetically controlled spring clutch mechanism according to the present invention is constructed as described above, and when the electromagnetic means, the unit assembly and the input rotary element are sequentially mounted from one end side to the other end side of the shaft member. , The pin member mounted in the pin hole of the shaft member engages with the pin receiving portion provided at one end of the second boss member, and on the other hand, from the one end side to the other end side of the shaft member sequentially. When the input rotary element, the unit assembly and the electromagnetic means are mounted, the pin member mounted in the pin hole of the shaft member engages with the pin receiving portion provided at the other end of the second boss member. Since the number of assembling elements is small, the number of assembling steps is small, and the assembling can be performed easily and quickly, and the assembling order can be changed to be used in two types.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example in which a specific example of an electromagnetically controlled spring clutch mechanism configured according to the present invention is applied to a timing roller of an electrostatic copying machine 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 an enlarged exploded perspective view showing an exploded unit assembly of the electromagnetically controlled spring clutch mechanism of FIG.

4 is a cross-sectional view showing a state where the unit assembly of FIG. 3 is mounted.

5 is a partially enlarged cross-sectional view for explaining a method of fixing the bias spring member of the unit assembly of FIG.

6 is a sectional view showing an example in which the electromagnetically controlled spring clutch mechanism of FIG. 1 is applied in a second mode.

[Explanation of symbols]

 2: Vertical front substrate 4: Vertical rear substrate 6: Bearing member 8: Bearing member 10: Support shaft 12: Timing roller 14: Locking member 16: Locking member 18: Electromagnetic control spring clutch mechanism 20: Gear (input rotary element) ) 22: rotor 24: amateur 26: unit assembly 28: electromagnetic means 30: field core 32: electromagnetic coil 34: sleeve member 44: first boss member 50: biasing spring member 52: support member 54: second boss Member 62: Notch (pin receiving portion) 64: Pin hole 66: Pin member 68: Recessed portion (pin receiving portion) 70: Rotor annular substrate 72: Rotor annular portion 74: Rotor connecting portion 77: Support member annular Flange 78: Annular center part of bias spring member 80: Projection part of bias spring member 86: Plate member (spring fixing member) 94: Protrusion 100: Coil spring means

Claims (5)

[Claims] 1. A shaft member rotatably mounted, an input rotary element rotatably mounted on the shaft member, a first boss member which rotates integrally with the input rotary element, and the shaft member. A unit assembly to be mounted, wherein the first
Second boss member disposed adjacent to the boss member and rotating integrally with the shaft member via a pin member, a rotor fixed to one end of the second boss member, and one surface side of the rotor An armature facing each other, a support member rotatably mounted on the second boss member, and an elastic member arranged between the support member and the armature and separating the armature from the one surface of the rotor. A unit assembly including a biasing spring member that biases the biasing member toward the other side; And the electromagnetic means for magnetically attracting the armature to the one surface of the rotor, and the first boss member and the other end portion of the second boss member are fitted to the unit assembly. From one end to be connected to the input rotary element To the other end, the coil spring means being wound in a direction in which the unit assembly and the input element are contracted when they are relatively rotated in association with the rotation of the input rotary element in a predetermined direction. , A single pin hole into which the pin member is mounted is formed in the shaft member, and pin receiving portions are provided at both ends of the second boss member, and one end of the shaft member is provided. When the electromagnetic means, the unit assembly and the input rotary element are sequentially mounted from one side to the other end side, the pin member mounted in the pin hole of the shaft member is the one end portion of the second boss member. When the input rotary element, the unit assembly and the electromagnetic means are sequentially mounted from the one end side of the shaft member toward the other end side thereof, the shaft is engaged with the pin receiving portion provided on the shaft. The pin member mounted in the pin hole of the member is provided at the other end of the second boss member. An electromagnetically controlled spring clutch mechanism, wherein the electromagnetically controlled spring clutch mechanism is engaged with the pin receiving portion. 2. The biasing spring member of the unit assembly comprises:
An annular central portion and a plurality of protruding portions extending in a sickle shape from the annular central portion, the annular central portion is fixed to the support member, and the free ends of the plurality of protruding portions are fixed to the armature. The electromagnetically controlled spring clutch mechanism according to claim 1, wherein 3. The unit assembly further includes a plate-shaped spring fixing member, and the biasing spring member is mounted between the spring fixing member and the supporting member by mounting the spring fixing member on the supporting member. The electromagnetically controlled spring clutch mechanism according to claim 2, which is fixed to the. 4. The spring fixing member is composed of an annular plate member substantially corresponding to the shape of the annular central portion of the biasing spring member, and a plurality of locking projections are provided on the peripheral edge of the plate member. On the other hand, a plurality of insertion holes are formed in the annular central portion of the bias spring member corresponding to the plurality of locking projections, and the bias spring member has the plurality of locking projections. 4. The electromagnetically controlled spring clutch mechanism according to claim 3, wherein each of the above is fixed between the plate member and the support member by locking each of them to the support member through the corresponding plurality of insertion holes. 5. The electromagnetically controlled spring clutch mechanism according to claim 1, wherein the shaft member is a support shaft on which a timing roller for starting the conveyance of copy paper in an electrostatic copying machine is mounted.