JP3114947B2 - Clutch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch device for controlling power transmission in various types of machinery.

[0002]

2. Description of the Related Art In office equipment such as a copying machine and a facsimile machine, various clutch devices connected to rollers and the like are provided as a paper feeding mechanism.

[0003]

However, for example, in the paper feed mechanism of these office machines, the rollers and the like are rotated together with the operating shaft, the operating shaft is idled, and only in one direction or the other direction. When performing complicated control by rotating rollers etc. together with the operating shaft, in addition to electromagnetic clutches and mechanical clutches that can completely connect or disconnect the operating shaft and rollers,
A predetermined number of one-way clutches had to be provided at appropriate locations. Therefore, the structure of these devices becomes complicated,
There was a problem that the size had to be increased.

In the conventional electromagnetic clutch and the like, the connection and disconnection are performed by utilizing the surface contact resistance of a magnet or a spring.
Electric power for holding the clutch plate in a predetermined position is also necessary,
It has been desired to develop a clutch device capable of obtaining a large holding force with less power consumption.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can perform a complicated control by one.
An object of the present invention is to provide a clutch device capable of simplifying and reducing the size of devices such as various office equipment and reducing power consumption and the like.

[0006]

In order to achieve the above object, a clutch device according to the present invention has an operating shaft rotatably inserted into a bearing hole provided at a substantially central portion and is independent of each other within a casing. The first and second bearing members are provided so as to be able to rotate forward and backward, and a plurality of grooves are formed in an operating shaft insertion hole provided in a substantially central portion.
A first and a second movable plate facing each other and rotatably disposed together with one of the bearing members, and an operating shaft insertion hole provided at a substantially central portion between the two bearing members. It has a plurality of wedge-shaped grooves formed so as to be opened and the groove bottom is inclined with respect to the tangential direction of the operating shaft at the center of the opening, and each of the grooves is formed such that the inclination directions of the groove bottoms are opposite to each other. First and second fixed plates disposed between the bearing member and the movable plate, respective grooves formed in the first movable plate, wedge-shaped grooves formed in the first fixed plate, and second Are inserted into the respective grooves formed in the movable plate and the respective wedge-shaped grooves formed in the second fixed plate, and are regulated by the grooves formed in the movable plate by rotating the bearing member to form the fixed plate. Rollable wedge-shaped grooves can be rolled in the direction of decreasing or increasing the groove depth The first and second needle rollers and the first and second needle rollers are maintained at positions where the wedge-shaped grooves of each fixed plate are rolled in the direction of decreasing or increasing the groove depth, respectively. And a possible reverse rotation preventing means.

[0007]

When the first bearing member is rotated in the forward direction and the second bearing member is rotated in the reverse direction, the first and second movable plates are rotated in the forward and reverse directions. The first needle roller is regulated by the groove of the first movable plate and rolls in the wedge-shaped groove of the first fixed plate, for example, in a direction of decreasing the groove depth. When the second bearing member is rotated in the other direction, the second bearing member is disposed such that the inclination direction of the groove bottom surface of the second fixing plate is opposite to the inclination direction of the groove bottom surface of the first fixing plate. Therefore, when the first needle roller rolls in the direction in which the groove depth becomes shallower, the second needle roller is also restricted by the groove of the second movable plate, and the wedge-shaped groove of the second fixed plate is formed. Rolls in the direction in which the groove depth becomes shallower. Further, the positions of the first and second needle rollers are maintained by the reverse rotation preventing means. That is, each needle roller is pressed against the wedge-shaped groove bottom and gradually approaches the peripheral surface of the operation shaft, and finally comes into contact with the peripheral surface of the operation shaft. At this time,
Since the bottom surface of the wedge-shaped groove in each fixing plate is a symmetrical reverse inclined surface, the operating shaft is independent of each bearing member and casing in both forward and reverse directions due to contact friction with the needle roller. Cannot rotate freely, and is locked. Therefore, when the operating shaft is driven to rotate in either the forward or reverse direction, the casing rotates similarly.

On the other hand, the first bearing member is moved in the opposite direction.
When the second bearing member is rotated in the forward direction, the operation is completely reversed, and each needle roller can freely rotate independently of each bearing member and the casing. Therefore, the operation of the operating shaft is not transmitted to the casing.

When the first bearing member and the second bearing member are both rotated forward or backward in the same direction, one needle roller regulated by the one bearing member and the groove of the movable plate operates. The other needle roller, which is regulated by the other bearing member and the groove of the movable plate, in the direction approaching the shaft, rolls in the direction away from the operating shaft, and the position is maintained by the reverse rotation preventing means. Therefore, for example, when both are rotated in the forward direction, the operating shaft rotates independently of the bearing member and the casing only in the reverse direction, cannot rotate independently in the other direction, and rotates in the opposite direction. When it is moved, independent rotation is possible in the forward direction and independent rotation is not possible in the reverse direction. This fulfills the same function as a one-way clutch.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A clutch device according to the present invention will be described below in more detail with reference to an embodiment shown in the drawings. In the figure, reference numeral 1 denotes a clutch device of the present embodiment, which includes a casing 2, an operating shaft 3, first and second bearing members 4, 5, first and second movable plates 6, 7, first and second clutches. Fixing plate 10, 1
The first and second needle rollers 14 and 15 and reverse rotation preventing means are provided.

The casing 2 is formed in a cylindrical shape having a predetermined length.
A part 2b near the center of the inner surface of the hollow part 2a is shown in FIG.
As shown in FIG. 8, first and second fixing plates 1 to be described later
It is formed on a flat surface for fixing the 0 and 11 so that they cannot rotate.

The first and second bearing members 4 and 5 are both formed in a substantially cylindrical shape, and their hollow portions together form bearing holes 4a and 5a of the operating shaft 3 connected to a drive source and the like. The operating shaft 3 is rotatably supported. First and second bearing members 4,
Numerals 5 are arranged in the hollow portion 2a of the casing 2 so as to be rotatable forward and backward independently of each other, and to have a certain gap between the end surfaces 4b and 5b. Part of the other end surfaces 4c, 5c of the bearing members 4, 5 (the other end portions 4d, 5d) are disposed so as to protrude from the open ends 2c, 2d of the casing 2. This is for turning each bearing member 4, 5 forward or reverse by applying an external force to the other end portions 4d, 5d. The driving means for rotating is not particularly limited, and may be configured to perform knurling on an outer periphery thereof and perform the rotation manually, or may be configured to perform electromagnetic control. In this case, the other end portions 4d and 5d do not protrude as in the present embodiment, and at least a part thereof is open end 2d of the casing 2.
A rotating member (not shown) provided so as to protrude from c and 2d may be separately connected to each of the bearing members 4 and 5.

The first and second movable plates 6 and 7 are shown in FIGS.
As shown in FIGS. 3 to 5, at least a part of the outer peripheral surfaces 6a and 7a are formed in a curved surface shape, and as shown in FIGS.
The first bearing member 4 and the second bearing member 5 are disposed so as to be rotatable with respect to each other and between the opposite end surfaces 4b, 5b of the second bearing member 5. In addition, the first and second movable plates 6,
At substantially the center of the shaft 7, working shaft insertion holes 6b and 7b for inserting and supporting the working shaft 3 are formed.
Grooves 6c, 7c opening to the working shaft insertion holes 6b, 7b are formed in the peripheral edges of b, 7b. This groove 6c,
Reference numeral 7c denotes a diameter which can be regulated by pressing the needle rollers 14, 15 in order to roll the needle rollers 14, 15 described later, that is, a width approximately equal to or slightly larger than the diameter of the needle rollers 14, 15. It is formed.

The first and second movable plates 6 and 7 are arranged so as to be able to rotate together with the first and second bearing members 4 and 5, respectively. The means for simultaneously rotating the two members is not particularly limited, but in the present embodiment, as shown in FIG.
A first connecting rod 8 whose other end 8b is fitted and fixed to the first movable plate 6 to connect the first bearing member 4 and the first movable plate 6 to each other; 9a is the second bearing 9 and the other end 9b is the second connecting rod 9 fitted and fixed to the second movable plate 7.
Thus, the first bearing member 5 and the second movable plate 7 are connected.

The first and second fixed plates 10 and 11 have operating shaft insertion holes 10a and 10a for inserting and supporting the operating shaft 3 at substantially central portions.
11a is formed, and the periphery thereof is opened to the operating shaft insertion holes 10a, 11a, and the groove bottom surface 10a is formed.
w, wedge-shaped grooves 10c, 11b formed so that b, 11b are inclined with respect to the tangential direction of the operating shaft 3 at the center of the opening.
11c are formed in plurality. First and second fixing plates 1
0 and 11 are, as shown in FIGS.
Between the bearing members 4 and 5 and the first or second movable plate 6 and 7, respectively. In the present embodiment, a plurality of fixing plates 10 and 11 each having a substantially disk shape and having a projection on the outer peripheral edge are superposed on each other.
Plural pieces are set as a set and mounted on plate holders 12, 13 having flanges 12a, 13a and cylinders 12b, 13b. In addition, the plate holder 1
As shown in FIGS. 6 and 8, flat portions 12c and 13c are formed on a part of the outer peripheral surfaces of the flat portions 12 and 13, respectively.
Rotation is impossible due to the contact between c, 13c and the flat surface 2b of the hollow portion 2a of the casing 2. Further, the plate holders 12 and 13 have escape notches 12d and 13d so as not to hinder the arrangement of the connecting rods 8 and 9 for connecting the bearing members 4 and 5 and the movable plates 6 and 7. Is formed.

As described above, the first fixed plate 10 and the second fixed plate 11 are respectively connected to the first bearing member 4 and the first fixed plate 4.
, The second bearing member 5 and the second movable plate 7
The wedge-shaped grooves 10c, 1
1c (the groove bottoms 10b, 10c, 11c at the center of the opening of the wedge-shaped grooves 10c, 11c with respect to the tangential direction of the operating shaft 3).
11b), the first fixed plate 10 and the second fixed plate 11 are arranged to be opposite to each other.

The first needle roller 14 has a first groove 6c of the first movable plate 6, a wedge-shaped groove 10c of the first fixed plate, and a groove 6c of the first movable plate 6 having substantially the same shape as the first groove 6c. The roller member 4 is inserted into a roller holding groove 4e (see FIG. 5) formed so as to open on one end surface 4b of the bearing member 4, and a plurality of roller holding grooves 4c are provided corresponding to the groove portions 6c, the wedge-shaped grooves 10c, and the roller holding grooves 4e. You. Similarly to the first needle roller 14, the second needle roller 15 has a groove 7c of the second movable plate 7, a wedge-shaped groove 11c of the second fixed plate, and a groove 7c of the second movable plate 7. The second bearing member 5 has substantially the same shape as
Are inserted through roller holding grooves (not shown) formed so as to open on one end surface 5b.

As the reverse rotation preventing means, the first and second needle rollers 14 and 15 have shallow groove depths in the wedge-shaped grooves 10c and 11c of the first and second fixed plates 10 and 11, respectively. Any structure may be used as long as it can maintain its position and prevent rolling in the opposite direction when it is rolled in the direction of becoming deeper or deeper.

In this embodiment, as shown in FIG. 5, spring grooves 4f, 5f are provided so as to open on the side peripheral surfaces of the first bearing member 4 and the second bearing member 5, respectively. , 5f are provided with springs 4g, 5g and bearings 4h, 5h resiliently urged by the springs 4g, 5g are provided. Further, on the inner peripheral surface 2a of the casing 2, a pair of substantially semicircular concave portions 2e and 2f are continuously provided in a circumferential direction as a set (see FIG. 8), and disposed on the first bearing member 4. A predetermined number is provided at a position corresponding to the bearing 4h and the bearing 5h provided on the second bearing member 5, and the springs 4g, 5g and the bearings 4h, 5g are provided.
h and the substantially semicircular recesses 2e and 2f constitute reverse rotation preventing means. The bearings 4h, 5h and the substantially semicircular recesses 2e, 2f are adjacent to the substantially semicircular recesses 2e, 2f.
Each bearing 4h, 5h for the portion (projection) between f
The needle rollers 14 and 15 are formed in the wedge-shaped grooves 10c and 11c of the fixed plates 10 and 11 so that the needle rollers 14 and 15 can be positioned substantially at the center of the fixed plates 10 and 11.

Here, reference numerals 16 and 17 denote stop reelings for preventing the operating shaft 3 from coming off provided in contact with the other end surfaces 4c and 5c of the first bearing member 4 and the second bearing member 5.

Next, the operation of the clutch device 1 of this embodiment will be described. First, when the rotation of the operating shaft 3 is stopped, the first bearing member 4 and the second bearing member 5 are rotated in opposite directions. Thereby, the first movable plate 6 and the second movable plate 7 connected by the first connection rod 8 and the second connection rod 9 are respectively rotated in opposite directions, and each movable plate is rotated. The first and second needle rollers 14 and 15 regulated by the grooves 6c and 7c of the sixth and seventh pivots are respectively rotated in opposite directions. If the first needle roller 14 is rolled in the wedge-shaped groove 10c of the first fixed plate 10 in the direction in which the groove depth becomes shallow when the first movable plate 6 rotates in the forward direction, The second needle roller 15 causes the wedge-shaped groove 11c of the second fixed plate 11 to move to the first position by the rotation of the second movable plate 7 in the opposite direction.
The second needle roller 15 is similarly rotated in a direction in which the groove depth becomes shallower in the wedge-shaped groove 11c because the second needle roller 15 is disposed so as to be inclined at an opposite angle to the wedge-shaped groove 10c of the fixing plate 10 of FIG. Be moved.

At this time, the bearings 4h, 5h rotate together with the first bearing member 4 or the second bearing member 5, and are located in one of the substantially semicircular recesses 2e, 2f, for example, 2e, and the springs 4g, 5g. And the curved surface of the substantially semicircular recess 2e, the protrusion 2 between the adjacent substantially semicircular recesses 2e and 2f.
It is urged to flee from g. Therefore, each of the bearing members 4, 5 and each of the movable plates 6, 7 are connected to the needle roller 14,
15 is a wedge-shaped groove 10c, 11c of each fixed plate 10, 11
The position of the needle rollers 14 and 1 is maintained in a state in which the needle rollers 14 and 1 are moved in a direction in which the groove depth becomes shallower.
5 is prevented (see FIG. 9).

Thus, the operating shaft 3 is connected to the needle roller 1
By contact friction with 4,15, in both forward and reverse directions,
When the bearing members 4 and 5 and the casing 2 cannot rotate independently of each other and are transmitted by a driving force from an arbitrary driving source to rotate the operating shaft 3 in either the forward or reverse direction, The casing 2 also rotates in the same direction.

When the first bearing member 4 and the second bearing member 5 are rotated in the opposite directions, that is, when the first bearing member 4 is rotated in the reverse direction and the second bearing member 5 is rotated in the forward direction. The needle rollers 14 and 15 are rolled in the wedge-shaped grooves 10c and 11c of the fixed plates 10 and 11 in a direction in which the groove depth is increased. Further, since the bearings 4h and 5h are positioned in the other approximately semicircular concave portion 2f over the protrusion 2g, the needle rollers 14 and 15 of the bearing members 4 and 5 and the movable plates 6 and 7 are fixed to the fixed plates 10 and 5 respectively. In the wedge-shaped grooves 10c, 11c of the eleventh embodiment, the positions are maintained in a state where the grooves are moved in the direction of increasing the groove depth, and the reverse rotation of the needle rollers 14, 15 is prevented (see FIG. 10). Therefore, the pressing force of the wedge-shaped grooves 10c, 11c against the needle rollers 14, 15 from the groove bottoms 10b, 11b decreases, and the operating shaft 3 and the needle rollers 14, 15
Also, the contact friction force with the contact 15 becomes small. Thereby, the operating shaft 3 can freely rotate independently of the bearing members 4 and 5 and the casing 2, and even if the operating shaft 3 rotates, its rotational force is not transmitted to the casing 2.

In this state, when only the first bearing member 4 is rotated in the forward direction (that is, from the state where the bearings 4h and 5h are located on the protrusions between the substantially semicircular concave portions 2e and 2f). When the first bearing member 4 and the second bearing member 5 are both rotated in the forward direction), the first needle roller 14 that is pressed and regulated by the first bearing member 4 and the first movable plate 6 Is rolled in the wedge-shaped groove 10c of the first fixed plate 10 in the direction in which the groove depth becomes shallow, and the state in which the roller 4h is rolled in the direction in which it becomes shallow by the bearing 4h is maintained. On the other hand, the second needle roller 15
The bearing 5 is rolled in the wedge-shaped groove 11c of the second fixing plate 11 in a direction of increasing the groove depth.
h. Therefore, when the operating shaft 3 tries to rotate in the reverse direction, the first needle roller 14
However, when it is attempted to rotate in the forward direction, any one of the needle rollers 14 and 1 cannot rotate.
5 and hardly receive contact friction, and independent rotation in the forward direction is free. That is, when the operating shaft 3 rotates in the forward direction, the rotational force is not transmitted to the casing 2, but when the operating shaft 3 rotates in the reverse direction, the rotational force is transmitted to the casing 2, and the casing 2 Rotate with.

On the other hand, when the first bearing member 4 and the second bearing member 5 are both rotated in the opposite directions from this state, the first needle roller 14 is turned to the first fixed plate 10
In the wedge-shaped groove 10c of the second fixed plate 11, the second needle roller 15 is rolled in the direction of decreasing the depth of the wedge-shaped groove 11c. It is moved and located. Therefore,
When the operating shaft 3 tries to rotate in the forward direction, it cannot rotate due to the contact friction with the second needle roller 15, but when it tries to rotate in the reverse direction, it becomes independent and free to rotate. Is transmitted only when rotating in the opposite direction.

[0027]

According to the clutch device of the present invention, the power transmission between the operating shaft and the casing can be performed in any rotational direction, the power transmission can be completely cut off, or Power can be transmitted only in one direction. Therefore, it is possible to reduce the size of various office equipment and the like, which conventionally required a plurality of one-way clutches and the like, and to expect applications in various fields.

Further, if the bearing member is rotated so as to move the needle roller to a predetermined position in the wedge-shaped groove of the fixed plate, thereafter, no external force (electric power or the like) is required, and the operating shaft and the operating shaft are not required. The connection state or the cutoff state with the casing member can always be maintained. Therefore, it is only necessary to apply electric power or the like for rotating the bearing member, which contributes to power saving.

Further, since the operating shaft is controlled by the wedge-shaped groove provided on the fixing plate and the needle roller inserted and disposed therein, when the operating shaft and the casing member are connected,
The power transmitted from the operating shaft to the casing is much larger than that of an electromagnetic clutch or the like.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an embodiment of a clutch device of the present invention.

FIG. 2 is a schematic plan view of the embodiment.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a sectional view taken along line CC of FIG. 2;

FIG. 6 is a sectional view taken along line DD of FIG. 3;

FIG. 7 is a sectional view taken along line EE of FIG. 3;

FIG. 8 is a sectional view taken along the line FF of FIG. 3;

FIG. 9 is a schematic diagram for explaining the operation of the embodiment.

FIG. 10 is a schematic diagram for explaining the operation of the embodiment.

[Explanation of symbols]

 Reference Signs List 1 clutch device 2 casing 3 operating shaft 4 first bearing member 5 second bearing member 6 first movable plate 7 second movable plate 8 first connecting rod 9 second connecting rod 10 first fixed plate 11 second fixing plate 14 first needle roller 15 second needle roller

Continuation of the front page (72) Inventor Yukihisa Kajiyama 1-3-2-702 Shinmei, Adachi-ku, Tokyo (56) References JP-A-3-277833 (JP, A) JP-A-4-88212 (JP, A) JP-A-4-228939 (JP, A) JP-A-54-151755 (JP, A) JP-A-57-119132 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16D 41/00-41/36 B65H 5/06

Claims (1)

(57) [Claims] An operating shaft is rotatably inserted into a bearing hole provided at a substantially central portion, and first and second bearings are disposed in a casing so as to be rotatable forward and backward independently of each other. The member has a plurality of grooves formed in the operating shaft insertion hole provided in the substantially central portion, and can be rotated between two bearing members, facing each other and with one of the bearing members. A first and a second movable plate disposed at the center of the opening; and an opening formed in an operating shaft insertion hole provided at a substantially central portion, and a groove bottom surface is inclined with respect to a tangential direction of the operating shaft at the center of the opening. A first and a second fixed plate disposed between each bearing member and the movable plate so as to have a plurality of wedge-shaped grooves formed in 1, each wedge-shaped groove formed on the first movable plate and each wedge-shaped groove formed on the first fixed plate; And each wedge-shaped groove formed in the second fixed plate and each wedge-shaped groove formed in the second fixed plate are inserted into the groove. The first and second needle rollers and the first and second needle rollers, which are arranged so as to be able to roll in a direction in which the groove depth of the wedge-shaped groove formed in the plate becomes shallow or deep, respectively. A reverse rotation preventing means which can be maintained at a position where the wedge-shaped groove of the fixed plate is rolled in a direction of decreasing or increasing the groove depth.