JPH1025034A - Drive transmitting device and sheet feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive transmitting device which can be easily assembled, can smoothly transmit a driving force from one rotary shaft to another rotary shaft, and can be stably connected electrically. SOLUTION: This sheet feeder is provided with the first rotary shaft, the second rotary shaft, a coupling 30 which is arranged between the first rotary shaft and the second rotary shaft so as to connect them together while including the end parts of the two rotary shafts so as to transmit a rotary driving force of one rotary shaft to the other, and a connecting member 37 electrically connecting the first rotary shaft to the second rotary shaft in the coupling 30. Each of the rotary shafts is provided with a spherical part in the part included in the coupling 30, and the outside diameter of the spherical part is larger than the diameter of the rotary shaft and is equal to the inside diameter of the coupling 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive transmitting device for transmitting a driving force from a rotating shaft to a rotating shaft, and more particularly, to a sheet transmitting device such as a printer, a facsimile, and a copying machine. The present invention relates to a drive transmission device that transmits a driving force to a rotating body that feeds each one.

[0002]

2. Description of the Related Art In general, in a sheet material feeding device of office equipment such as a copying machine, a large number of sheet materials such as transfer paper and photosensitive paper are stacked and stored in a cassette or a deck.
One sheet material is fed from the sheet bundle to a next process by a feeding roller or the like.

FIGS. 9 to 12 are explanatory views of a conventional sheet material feeding apparatus. Hereinafter, a conventional example will be described with reference to FIGS. In the figure, 51 is a feed roller, 52 is a retard roller, 53 is a pickup roller,
The sheet materials S stacked and stored in the cassette 54 are separated and fed one by one by the number of rollers.

The feed roller 51 and the retard roller
52, a driving force from a stepping motor (not shown) is applied to the shaft 51a of the feed roller 51 and the shaft 52a of the retard roller 52.
a to rotate. The pickup roller 53 is configured to rotate by transmitting the driving force of the feed roller 51 via a gear train (not shown). Further, a torque limiter 55 is provided on a shaft 52a of the retard roller 52, and the forward / reverse rotation of the retard roller 52 is controlled by the torque limiter 55.

The retard roller 52 is pressed against the feed roller 51 with a predetermined separation pressure, and is configured to be able to contact and separate from the feed roller 51 while maintaining a parallel relationship. Specifically, the retard roller
An end of a shaft 52a of the shaft 52 and an end of a shaft 56 to which a driving force is transmitted from a stepping motor (not shown) via a gear train or the like are connected by a coupling 57. Thus, even when the sheet material S enters between the feed roller 51 and the retard roller 52 and the retard roller 52 is separated from the feed roller 1 by a small distance, the rotational driving force can be transmitted.

Further, the sheet material S returned at the time of separation by the feed roller 51 and the retard roller 52 may remain sandwiched between the feed roller 51 and the retard roller 52. If the cassette 54 is pulled out in this state, the sheet material S is damaged as shown in FIG.
Must be separated from the feed roller 51. Further, considering the wear of each roller and the release of the separation pressure of the retard roller 52, the feed roller 51 of the retard roller 52 is considered.
It is necessary to increase the separation distance from. Therefore, in coupling the shafts 52a and 56 with the coupling 57, FIG.
As shown in the figure, there is a difference between the outer diameter of the shafts 52a and 56 and the inner diameter of the coupling 57. As a result, the separation distance can be increased, and drive transmission can be performed even if a misalignment occurs between the shaft 52a and the shaft 56.

[0007]

However, in the above-mentioned conventional example, as shown in FIGS. 9 and 10, the coupling 57 easily shifts with respect to the center of the shaft 56 on the drive side, and is shifted. was there. When this displacement occurs, when the drive is transmitted, the displacement sometimes causes a non-uniform moment to act on the driven-side shaft 52a. Then, the separation pressure of the retard roller 52, which is very important under the feeding conditions, fluctuates, and a slip jam or a jam due to the reverse rotation of the retard roller 52 may occur.

As described above, when the above-described conventional coupling 57 is used for the mechanism for transmitting the drive to the retard roller 52, a pressure fluctuation which is important for the separation performance occurs, and it is not possible to satisfy the sufficient separation performance. Was. Further, the wear condition of the roller also causes uneven wear due to the pressure fluctuation, and the durability may be poor.

When the shaft 52a and the shaft 56 are electrically connected, the coupling 57 is formed of a material having good conductivity, thereby electrically connecting the shafts 52a and 56. Although there are some, the retard roller with the change of the driving load
In the drive transmission of 52, the state of electrical connection was unstable.

Conventionally, as shown in FIG. 12, when the drive side shaft 56 is inserted and assembled, the shaft 52a of the retard roller 52 is
May be separated from the bearing hole 58a provided in the frame 58,
The wall of the frame 58 was blind, making assembly very difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to facilitate an assembling operation, to smoothly transmit a driving force from a rotating shaft to a rotating shaft, and to reduce electric power. An object of the present invention is to provide a drive transmission device with stable connection.

[0012]

To achieve the above object, a typical configuration of the present invention comprises a first rotating shaft, a second rotating shaft, and the first rotating shaft and the second rotating shaft. Between the two rotating shafts, including the ends of the two rotating shafts, connecting the shafts with each other, and transmitting the rotational driving force of one rotating shaft to the other rotating shaft; and A connection member for electrically connecting the first rotation shaft and the second rotation shaft, wherein each of the rotation shafts has a spherical portion in a portion included in the coupling, The outer diameter of the spherical portion is larger than the outer diameter of the rotating shaft, and is substantially the same as the inner diameter of the coupling.

A spherical member having the spherical portion is attached to a portion of the rotary shaft included in the coupling, and the spherical member has a good sliding property with respect to the coupling. It is characterized by being formed by.

According to the above configuration, the coupling does not deviate from the center of the rotating shaft, and the driving force can be smoothly transmitted from the rotating shaft to the rotating shaft.

Further, the spherical member has an opening on the shaft end side, and the rotating shaft is electrically connected by inserting the connecting member into the opening or a shaft end in the opening. It is characterized by.

According to the above construction, for example, a gap is provided between the outer diameter of the end of the rotating shaft and the inner diameter of the spherical member, and a connecting member is inserted into the gap and connected, whereby the connecting member is connected to the coupling. Since it is sandwiched between the inner diameter portion and the outer diameter portion of the rotating shaft, a stable electric connection can be performed without causing twisting when transmitting the drive.

The coupling has a through slot at one end perpendicular to the axial direction, and a notch at the other end, and a notch at the end face. A pin press-fitted vertically to the shaft in the axial direction penetrates the shaft, and the cutout groove has a retaining portion for preventing the pin from coming off in the thrust direction.

According to the above configuration, the coupling has the through-hole and the cutout groove for connecting the rotary shafts, and the cutout grooves are provided with the retaining portions. Although the separating force acts during the assembly due to the reaction force of the connecting member such as the extendable compression coil spring, the assembling property is not impaired.

An opening for inserting the other rotating shaft of the coupling in which one of the rotating shafts is coupled is arranged to stand by near a bearing hole provided in the frame for supporting the other rotating shaft. Wherein the posture of the coupling is maintained. Specifically, the connecting member is a retractable compression coil spring, and protrudes from the coupling when only one rotation shaft is mounted in the coupling, and protrudes from the coupling of the connecting member. The position of the coupling is maintained by inserting a portion into a bearing hole of the frame.

According to the above construction, the connecting member is projected from the other opening of the coupling in which only one of the rotating shafts is connected, and the projecting portion of the connecting member is inserted into the bearing hole of the frame. Therefore, the coupling member can be used as an insertion guide when the other rotating shaft is inserted into the coupling, so that the assemblability can be improved.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a drive transmission device to which the present invention is applied and a sheet feeding device using the same will be specifically described with reference to the drawings. In the following embodiment, a sheet feeding apparatus in a copying machine as an image forming apparatus will be described as an example.

[First Embodiment] A first embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of a sheet material feeding device using a drive transmission device according to the present invention, FIG. 2 is a schematic sectional view showing a periphery of a coupling portion in the device, and FIG. 3 is a retard roller in the device. FIG. 4 is an enlarged sectional view showing a coupling portion when the retard roller is separated, FIG. 5 is an enlarged sectional view showing a state at the time of assembling the drive shaft, and FIG. FIG. 7 is an enlarged sectional view showing an electric connection member provided in a coupling, and FIG. 7 is a schematic sectional view showing a schematic configuration of a copying machine to which the present invention is applied.

The order of the following description is as follows. First, the overall configuration of a copying machine as an image forming apparatus will be briefly described, and then the drive transmission device according to the present invention and a sheet feeding device using the same will be described. explain in detail.

First, the schematic structure of the copying machine will be briefly described with reference to FIG. A document G set in an automatic document feeder 2 provided at the upper part of the copying machine main body 1 so as to be openable and closable.
Are supplied one by one onto the platen glass 3, and the reading means 4
The image is read. The image read by the reading unit 4 is transferred to a laser scanner 13 described later.

Further, a plurality of sheet materials S stacked on a cassette 5 which is detachably attached to a lower portion of the copying machine main body 1 are:
The sheets are separated and fed one by one by a sheet feeding device 20 described later, and fed to the registration roller pair 6. The sheet material S sent to the pair of registration rollers 6 is sent between the photosensitive drum 8 and the transfer unit 9 in synchronization with the image forming operation in the image forming unit 7, where the photosensitive drum 8
The toner image formed thereon is transferred. The sheet material S after the transfer is subsequently sent to the fixing device 10, where the fixing process of the toner image is performed. Then, the sheet material S that has been subjected to the fixing process is discharged out of the apparatus by the discharge roller pair 11, and is stacked on the tray 12.

The image forming section 7 includes a laser scanner 13 having a laser transmission device 13a, a polygon mirror 13b, a reflection mirror 13c, and the like, in addition to the photosensitive drum 8, the transfer device 9, and the fixing device 10. A charging unit 14 for uniformly charging the surface of the photosensitive drum 8; and a developing unit 15 for developing a latent image formed on the photosensitive drum 8 with toner.
And a cleaning unit 16 for removing the toner remaining on the photosensitive drum 8 after the transfer.

In the present embodiment, the photosensitive drum 8 and the charging means 14, the developing means 15, and the cleaning means 16 as the process means are separately arranged and configured. A cartridge may be used, and the cartridge may be configured to be detachable from the copier body 1.

Next, a drive transmission device according to the present invention and a sheet feeding device using the same will be described in detail with reference to FIGS.

In FIG. 1, a cassette 5 in which a large number of sheet materials S are loaded and housed has a middle plate 5a as a sheet material loading table inside the cassette 5, and a cassette loading section 17 provided in the copying machine main body 1. It is designed to be detachably attached to The cassette loading section 17 is provided with a plurality of feed rollers 21, 22, and 23 for sequentially feeding the stacked sheet materials S.

Reference numeral 21 denotes a feed roller serving as a first rotating body, which rotates in the transport direction of the sheet material S. twenty two
Reference numeral denotes a retard roller as a second rotating body, which is rotatable in the conveying direction of the sheet material S and in the opposite direction by being pressed against the feed roller 21. Reference numeral 23 denotes a pickup roller for feeding the sheet material S between the pair of rollers 21 and 22. Then, these three feed rollers 21, 22, 23
The sheet materials S stacked in the cassette 5 are separated and fed one by one.

A roller holder 24 supports the feed roller 21 and the pickup roller 23. The pickup roller 23 is swingably supported by the roller holder 24 around the feed roller 21.

The pickup roller 23 is capable of contacting / separating from the uppermost sheet material S in the cassette 5. More specifically, the pickup roller 23 contacts the sheet material S during pickup feeding, and thereafter, contacts the sheet material S. At the time of separation by the roller pairs 21 and 22, it rises and separates from the sheet material S. That is, during this period, the three feed rollers 21, 22, and 23 are driven by the motor 25 as a drive source, so that the sheet materials S stacked in the cassette 5 are separated and fed one by one. You.

The driving force from the motor 25 is transmitted to a reduction gear 26 via a drive transmission mechanism (not shown), and further transmitted to gears 27 and 28 meshing with the reduction gear 26, respectively. The driving force transmitted to the gear 27 is transmitted to the feed roller 21 via a shaft 21a, and the feed roller 21
Is designed to rotate. In addition, pickup roller
Reference numeral 23 is such that the driving force transmitted to the feed roller 21 is transmitted via a drive transmission mechanism (a gear train or the like) (not shown) to rotate. The driving force transmitted to the gear 28 is transmitted to the retard roller 22 via a shaft 29 as a first rotating shaft, a coupling 30, a shaft 22a as a second rotating shaft, and a torque limiter 31, which will be described later. The retard roller 22
Is designed to rotate.

As shown in FIG. 3, the retard roller 22 is supported by a support member 33 whose shaft 22a is swingably mounted on a bearing member 32, and maintains a parallel relationship with the feed roller 21. It is possible to come and go while doing. The support member 33 is urged by a spring 34 bridged between the support member 33 and the bearing member 32, that is, the retard roller 22 is pressed against the feed roller 21 with a predetermined separation pressure.

A torque limiter 31 is mounted on the shaft 22a of the retard roller 22, and the forward / reverse rotation of the retard roller 22 is controlled by the torque limiter 31. Further, a coupling 30 for transmitting the rotational driving force of the shaft 29 to the shaft 22a is provided between the shaft 29 serving as the first rotating shaft and the shaft 22a serving as the second rotating shaft. The shaft ends of the two shafts 29 and 22a are included and connected to each other. Thus, even when the sheet material S enters between the feed roller 21 and the retard roller 22 and the retard roller 22 is separated from the feed roller 21 by a small distance, the rotational driving force can be transmitted.

FIG. 16 shows a conventional coupling.
As described above with reference to FIG. 17 and FIG. 17, since a difference is provided between the inner diameter of the coupling and the outer diameter of the shaft so that the retard roller can be moved toward and away from the shaft, the coupling is biased with respect to the center of the shaft. Had occurred. When this deviation occurs, a large variation is caused in the separation pressure of the retard roller with respect to the feed roller when transmitting the rotation from the shaft to the shaft, resulting in poor paper feeding and uneven wear of the retard roller. There was a possibility that the performance would be greatly reduced.

Therefore, according to the present invention, as shown in FIGS. 2 and 4, a spherical member 35 having a spherical portion 35a is attached to a portion of the shafts 29 and 22a included in the coupling 30. It has become. The spherical part of this spherical member 35
35a is formed so that the outer diameter is larger than the outer diameter of the shafts 29 and 22a and is substantially the same as the inner diameter of the coupling 30. Further, this spherical member 35 is a coupling.
A member with good slidability with respect to 30 (for example, POM, PP
C, Teflon powder-containing material, oil-containing material, etc.).

With this configuration, it is possible to prevent the coupling 32 from being shifted with respect to the center of the shafts 29 and 22a, and to prevent a reduction in the feeding ability due to the above-described offset. it can.

As shown in FIG. 4, the spherical member 35 has an opening 35b on the shaft end side, and has an inner diameter of the opening 35b and an outer diameter of each shaft end in the opening 35b. A gap 36 is provided between them. Then, a connecting member 37 for electrically connecting the shaft 29 and the shaft 22a in the coupling 30 is inserted into the gap 36. Thereby, the shaft 29
And the shaft 22a are electrically connected. The connecting member 37 is extendable and contractible. Specifically, in this embodiment, a compression coil spring is used.

As described above, since the end of the compression coil spring 37 is not included in the spherical member 35 and is not exposed,
As shown in the conventional example shown in FIG. 1, the compression coil spring 37 is not caught between the inner wall of the coupling 35 and the outer diameters of the shafts 29 and 22a, so that twisting does not occur when driving is transmitted. That is, stable electric connection can be performed while realizing smooth drive transmission without fluctuation of the separation pressure of the retard roller. still,
The term “torsion” as used herein means that the corners of the windings of the compression coil spring 37 bite into the inner wall of the coupling 35, thereby causing a large resistance to the movement of the coupling 35 and displacing the axis of the two axes. Cannot be instantaneously followed, and the separation pressure fluctuates.

An opening for inserting the other shaft 29 of the coupling 30 in a state where the one shaft 22a is connected is provided with a bearing hole 39a provided in the main body frame 39 for supporting the other shaft 29. The configuration is such that the posture of the coupling 30 is maintained so as to stand by nearby. More specifically, the connecting member 37 is a compression coil spring that can be extended and contracted, and as shown in FIG. 5, the connecting member 37 is connected to the coupling 30 in a state where only one shaft 22a is mounted in the coupling 30. From the coupling 30 of the connecting member 37 and the bearing hole 39 of the frame 39.
By inserting the coupling 30 into the coupling 30a, the posture of the coupling 30 is maintained.

Thus, the coupling of the connecting member
By projecting a portion projecting from 30 through a bearing hole 39a provided in the main body frame 39, when the shaft 29 on the drive input side is inserted into the coupling 30 along the arrow shown in FIG. Since the connecting member 37 protruding from the bearing hole 39a of the main body frame 39 functions as a guide, assemblability is improved.

The coupling 30 has an elongated through hole 30a perpendicular to the axial direction at one end (the shaft 22a side) and a cutout groove 30b opened at the end surface at the other end (the shaft 29 side). The shafts 22a and 29 are connected to each other by passing a pin 38, which is press-fitted vertically into the shafts 22a and 29 in the axial direction, into the through-hole 30a and the cutout groove 30b. Further, a retaining portion 30c is provided in the notch groove 30b, and a pin 38 of the shaft 29 attached to the notch groove 30b is provided.
Is prevented from coming off in the thrust direction. That is, when assembled as described above, a force in the direction opposite to the insertion direction acts on the shaft 29 by the connecting member 37, but the shaft 29 comes off the coupling 30 by the retaining portion 30c. It will not be lost.

With the above-described configuration, stable electrical connection can be performed while assuring smooth drive transmission without fluctuation in the separation pressure of the retard roller, and the assembling property is good.

[Second Embodiment] Next, a second embodiment of the present invention will be specifically described with reference to the drawings. FIG. 7 is an enlarged sectional view showing the coupling part.

Since the configuration of the apparatus is substantially the same as that of the above-described embodiment, the detailed description is omitted here. Also,
Members having functions and configurations equivalent to those of the above-described embodiment are denoted by the same reference numerals.

In the first embodiment described above, the two shafts 22
Although the configuration in which the spherical members 35 having the spherical portions 35a are respectively attached to the shaft ends of the shaft members a and 29 and connected by the connecting members 37 is illustrated, in the present embodiment, the spherical members 35 and 35 are connected to the spherical members 35 and 35. A spherical member 40 having the function of the member 37 is provided, and the two shafts 22a and 29 are press-fitted into the spherical member 40 to be electrically connected. This spherical member 40 is
Spherical part included in coupling 30 of 22a, 29
A connecting portion 40b is formed integrally between the spherical portions 40a. The connecting portion 40b functions as a connecting member.
The connecting portion 40b of the spherical member 40 has elasticity,
It is formed in a narrow shaft shape having a smaller sectional area than the spherical portion 40a. The spherical member 40 is formed of a material having a very low electric resistance (for example, conductive POM) in order to electrically connect the shafts 22a and 29.

As described above, in this embodiment,
Since it is not necessary to separately provide a connecting member for performing an electrical connection, the number of parts can be reduced, which is advantageous in terms of cost. Further, the two shafts 22a and 29 are spherical members as described above.
The electrical connection is stable because each is press-fitted into the 40.

[Other Embodiments] In the above-described embodiment, a configuration in which a spherical member having a spherical portion is attached to a portion included in the coupling of each rotating shaft, or a connecting member for electrical connection is integrally formed. However, the present invention is not limited to this. For example, the same effect can be obtained even when the rotating shafts and the spherical portions are integrally formed. can get.

Further, in the above-described embodiment, as an embodiment of the image forming apparatus to which the present invention is applied, a copying machine provided with an automatic document feeder is exemplified. However, the present invention is not limited to this. The present invention is effective even for an image output terminal of an information processing device, a facsimile device having a transmission / reception function, or the like.

In the above-described embodiment, an example in which an electrophotographic recording system is used as a recording system has been described. However, the present invention is not limited to this, and other examples include a thermal transfer recording system, a thermal recording system, and a wire dot recording system. Recording method such as recording method,
Alternatively, any other recording method can be applied.

[0052]

As described above, according to the present invention,
Since the separation distance can be increased and the coupling does not deviate from the center of the shaft for transmitting the drive, an uneven moment during the transmission of the drive is not applied. As a result, it is possible to prevent the fluctuation of the separation pressure, which has occurred when the drive is transmitted to the retard roller, and to realize a stable paper feeding. In addition, since the roller is not worn unevenly without a pressure fluctuation, the durability of the roller can be improved.

As described above, according to the present invention, each of the first rotating shaft and the second rotating shaft has a spherical portion at a portion included in the coupling, and the outer diameter of the spherical portion is Since the outer diameter of the rotating shaft is larger than the inner diameter of the coupling, and more specifically, a sphere having the spherical portion at a portion included in the coupling of each of the rotating shafts. Because the spherical member is attached and the spherical member is formed of a member having good slidability with respect to the coupling, the coupling does not shift with respect to the center of the rotating shaft, and the rotation from the rotating shaft to the rotating shaft is performed. Driving force can be transmitted smoothly.

Further, the spherical member has an opening on the shaft end side, and the rotating shaft is electrically connected by inserting the connecting member into the opening or the shaft end in the opening. For example, a gap is provided between the outer diameter of the end of the rotating shaft and the inner diameter of the spherical member, and a connecting member is inserted into the gap and connected, whereby the connecting member is connected to the inner diameter of the coupling and the outer diameter of the rotating shaft. Since it is sandwiched between the first and second parts, the electric transmission can be performed stably without causing twisting when transmitting the drive.

Further, the coupling has a through-hole and a cutout groove for connecting the rotary shafts, and the cutout grooves are provided with retaining portions. The separating force acts during the assembly due to the reaction force of the connecting member such as the compression coil spring, but the assemblability is not impaired.

Further, the connecting member is made to protrude from the other opening of the coupling in which only one of the rotating shafts is connected, and the protruding portion of this connecting member is inserted into a bearing hole of the frame, thereby to position the coupling. Therefore, when the other rotating shaft is inserted into the coupling, the connecting member protruding from the bearing hole of the frame can be used as an insertion guide, so that the assemblability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a sheet material feeding device using a drive transmission device according to the present invention.

FIG. 2 is a schematic sectional view showing the vicinity of a coupling unit in the device.

FIG. 3 is a perspective view showing a state of a separation pressure of a retard roller in the apparatus.

FIG. 4 is an enlarged sectional view showing a coupling unit according to the first embodiment.

FIG. 5 is an enlarged cross-sectional view showing a state around a coupling portion during assembly.

FIG. 6 is an enlarged cross-sectional view in which an electric connection member is provided in a conventional coupling.

FIG. 7 is a schematic sectional view showing a schematic configuration of a copying machine to which the present invention is applied.

FIG. 8 is an enlarged sectional view showing a coupling unit according to a second embodiment.

FIG. 9 is a schematic cross-sectional view showing the vicinity of a conventional coupling unit.

FIG. 10 is a view of a conventional coupling unit viewed from a drive shaft side.

FIG. 11 is a schematic perspective view showing a state of a sheet material generated when the cassette is pulled out.

FIG. 12 is an enlarged cross-sectional view showing the vicinity of a coupling portion during conventional assembly.

[Explanation of symbols]

 G: Document S: Sheet material 1: Copy machine body 2: Automatic document feeder 3: Document table glass 4: Reading means 5: Cassette 6: Registration roller pair 7: Image forming unit 8: Photoconductor drum 9: Transfer device 10 fixing device 11 discharge roller pair 12 tray 13 laser scanner 13a laser transmitting device 13b polygon mirror 13c reflecting mirror 14 charging means 15 developing means 16 cleaning means 17 cassette loading section 20 sheet material Feeder 21 ... Feed rollers 21a, 22a, 29 ... Shaft 22 ... Retard roller 23 ... Pickup roller 24 ... Roller holder 25 ... Motor 26 ... Reduction gear 27 ... Gear 28 ... Gear 30 ... Coupling 30a ... Through-hole 30b ... Notch groove 30c ... retaining part 31 ... torque limiter 32 ... bearing member 33 ... support member 34 ... spring 35, 40 ... spherical member 35a, 40a ... spherical part 35b ... opening 36 ... gap 37 ... connecting member 38 Pin 39 ... main frame 39a ... bearing hole 40b ... connecting portion

Claims (8)

[Claims] 1. A first rotating shaft, a second rotating shaft, and between the first rotating shaft and the second rotating shaft, wherein the shafts are connected to each other while including ends of the two rotating shafts. A coupling for transmitting a rotational driving force of one of the rotation shafts to the other rotation shaft; and a connection for electrically connecting the first rotation shaft and the second rotation shaft within the coupling. Wherein each of the rotating shafts has a spherical portion at a portion included in the coupling, an outer diameter of the spherical portion is larger than an outer diameter of the rotating shaft, and the cup A drive transmission device having substantially the same diameter as the inner diameter of the ring. 2. A spherical member having the spherical portion is attached to a portion of each rotation shaft included in the coupling, and the spherical member has good slidability with respect to the coupling. The drive transmission device according to claim 1, wherein the drive transmission device is formed of a member. 3. The spherical member has an opening at a shaft end side, and the rotating shaft is electrically connected by inserting the connecting member into the opening or a shaft end in the opening. The drive transmission device according to claim 1 or 2, wherein: 4. The coupling has, at one end, a through-hole that is perpendicular to the axial direction, and at the other end, a notch groove that is open at the end face. 2. A pin, which is press-fitted perpendicularly to the rotating shaft in the axial direction, penetrates, and the cutout groove has a retaining portion for preventing the pin from coming off in the thrust direction. 3. The drive transmission device according to claim 1. 5. An opening for inserting the other rotating shaft of the coupling in which one of the rotating shafts is coupled stands by near a bearing hole provided in a frame for supporting the other rotating shaft. The drive transmission device according to claim 1, wherein the posture of the coupling is maintained as described above. 6. The coupling member is extendable and contractable, and protrudes from the coupling when only one of the rotation shafts is mounted in the coupling, and a portion of the coupling member that protrudes from the coupling. The drive transmission device according to claim 5, wherein the posture of the coupling is maintained by inserting the coupling into a bearing hole of the frame. 7. The drive transmission device according to claim 6, wherein the connection member is a compression coil spring. 8. A sheet material feeding apparatus for feeding a sheet material one sheet at a time, comprising: a first rotating body that rotates in a sheet material carrying direction; The drive transmission device according to any one of claims 1 to 7, further comprising: a second rotating body rotatable in a reverse direction; and a drive transmission unit that transmits a driving force to the second rotating body. A sheet material feeding device, characterized by using: