JP2635868B2 - Paper transport mechanism of facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper transport mechanism of a facsimile apparatus which transports a document by rotating a document transport roller and transports a document by rotating a platen roller.

[0002]

2. Description of the Related Art A facsimile apparatus includes a document transport roller for transporting a document, a platen roller for transporting recording paper, and a paper transport mechanism for rotating both rollers as appropriate. This type of conventional paper transport mechanism includes:
There is a type in which one motor is provided as a driving source, and the direction of transmission of the driving force of this motor is switched between the direction of the document conveying roller and the direction of the platen roller. This switching method is roughly classified into two types, a method of switching the driving of the motor by an electromagnetic clutch, and a method of switching by using a sun gear and a planetary gear.

FIG. 1 shows a switching system using an electromagnetic clutch.
As shown in FIG. 2, an electromagnetic clutch 58 is connected between the reduction pulley 53 and the intermediate pulley 59 to disconnect and connect the transmission of the driving force from the reduction pulley 53 to the intermediate pulley 59. And a motor pulley 5 attached to the drive shaft of the motor.
The first driving force is transmitted to the reduction pulley 53 by the first belt 52. The driving force transmitted to the reduction pulley 53 is transmitted to the document transport roller 57 via a small-diameter pulley 53a, a second belt 54, and a document transport pulley 56 integrally formed with the reduction pulley 53, while the electromagnetic clutch 58, The power is transmitted to a platen roller (not shown) via the intermediate pulley 59, the third belt 60, and the platen pulley 61.

Accordingly, when rotating the document conveying roller 57, the intermediate pulley 59 is moved by the electromagnetic clutch 58.
Is separated from the deceleration pulley 53 and the intermediate pulley 5 is rotated by the electromagnetic clutch 58 when the platen roller is rotated.
9 is connected to the reduction pulley 53.

However, in the above method, the cost of the facsimile machine is increased because the electromagnetic clutch 58 is expensive. For this reason, a switching method using a sun gear and a planetary gear, which are advantageous in terms of cost, is mainly employed.

In the switching method using the sun gear and the planetary gear, when the motor gear 72 rotates in reverse during transmission for document conveyance as shown in FIG. 13, the driving force is changed to a first reduction gear 73 and a second reduction gear. The light is transmitted to the sun gear 77 via the gear 74 and the driven gear 75, and the sun gear 77 rotates in the reverse direction. Around the sun gear 77, there is provided a first planetary gear 78 that meshes with the sun gear 77 and moves in the rotation direction of the sun gear 77, and the first planetary gear 78 moves in the reverse direction of the sun gear 77. It moves and meshes with the driven gear 84. Therefore, the rotation of the sun gear 77 is transmitted to the original conveying gear 86 via the first planetary gear 78, the driven gear 84, and the third reduction gear 85, and the original conveying roller integrally formed with the original conveying gear 86 reverses. It has become.

When the motor gear 72 rotates forward as shown in FIG. 14 at the time of reception for transporting the recording paper, the driving force is applied to the first reduction gear 73 and the second reduction gear 7 as shown in FIG.
4. The power is transmitted to the sun gear 77 via the driven gear 75, and the sun gear 77 rotates forward. Thus, the first planetary gear 78
Meshes with the fourth reduction gear 79, and the rotation of the sun gear 77
A first planetary gear 78, a fourth reduction gear 79, a driven gear 80,
It is transmitted to the platen gear 83 via 81 and 82, and the platen roller integrally formed with the platen gear 83 rotates forward.

Further, at the time of copying in which the original and the recording paper are simultaneously conveyed, as shown in FIG. 15, the motor gear 72 rotates forward and the platen roller rotates forward, as in the reception. At this time, the second planetary gear 76 meshing with the sun gear 77 and moving around the sun gear 77 is unlocked and meshes with the third reduction gear 85. Therefore, the rotation of the sun gear 77 is controlled by the second planetary gear 76 and the third
The document is transmitted to the document conveying gear 86 via the reduction gear 85, and the document conveying roller rotates in the reverse direction.

Further, since the paper transport mechanism of the facsimile apparatus is provided with an auto cutter device, it is necessary to reverse the platen roller in order to return the recording paper from the position of the auto cutter to the printing position at the time of reception. To this end, in the driving method at the time of reception, the motor reversely rotates the platen roller.

[0010]

However, in the structure of the conventional switching system using the sun gear and the planetary gear,
A plurality of gears including a reduction gear are interposed between the motor and the sun gear 77 that switches the power transmission direction of the motor between the document conveying roller direction and the platen roller direction. For this reason, the number of gears in the paper transport mechanism is increased, the structure is complicated, and the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described conventional problems, and has as its object to provide a paper transport mechanism of a facsimile apparatus which has a simple structure and can reduce the cost.

[0012]

According to a first aspect of the present invention, there is provided a paper transport mechanism for a facsimile apparatus, wherein a drive source capable of rotating a rotating shaft in a normal direction and a reverse direction is driven by the drive source. A sun gear and a planetary gear meshing with the sun gear are provided in the power transmission path between the original conveying roller and the platen roller, and the rotation direction of the driving source is switched to move the planetary gear around the sun gear, In the paper transport mechanism of the facsimile machine in which the power transmission direction of the drive source is switched between the document transport roller direction and the platen roller direction by switching the gear meshing with the planetary gear, the planetary gear is rotatably supported. Planet gear
The support plate and the planetary gear support plate are arranged around the rotation axis of the sun gear.
Support plate mounting member that is rotatably mounted on the
When a drive source mounting member for mounting the source is provided
In both cases , the sun gear is provided on the rotating shaft of the drive source ,
The support plate mounting member is fixed to the drive source mounting member.
It is characterized by being.

According to a second aspect of the present invention, there is provided a paper transport mechanism for a facsimile apparatus, in which a rotary shaft is fixed in order to solve the above-mentioned problem.
A drive source capable of reversing and reversing, and a drive source
Power transmission between the original transport roller and platen roller
On the road, a sun gear and a planetary gear meshing with this sun gear
Switch the rotation direction of the drive source to
Move around the positive gear and cut the gear that meshes with the planetary gear.
By changing the direction, the power transmission direction of the drive source
Switch between the feed roller direction and the platen roller direction.
The paper transport mechanism of the facsimile machine
The positive gear is provided on the rotation shaft of the drive source. On the sun gear mounting side of the drive source, a cylindrical support plate mounting member made of elastic resin is provided coaxially with the rotation shaft of the drive source. A planetary gear support plate that rotatably supports the planetary gear is rotatably mounted on the plate mounting member, while the support plate mounting member is divided into a plurality of parts in parallel with the axis, and at least one of the divided parts is provided. At the tip, a guide surface for guiding the insertion of the planetary gear support plate is provided.
It is characterized in that it has a retaining portion for retaining that protrudes outward in the radial direction of the support plate mounting member.

According to a third aspect of the present invention, there is provided a paper transport mechanism for a facsimile apparatus according to the first aspect of the present invention.
The planetary gear support plate is characterized in that the inner diameter is formed to be smaller than the tip diameter of the sun gear.

[0015]

According to the first aspect of the present invention, since the sun gear is provided directly on the rotating shaft of the driving source, there is no need to provide a gear between the driving source and the sun gear. Therefore, the number of gears can be reduced, and the structure is simplified.

Moreover, the planetary gear, the planetary gear support plate and the support
A planetary gear mechanism consisting of a holding plate mounting member attaches a drive source
Planetary gear
Compared to the case where the mechanism is mounted on the rotating shaft of the drive source,
Assembly accuracy is improved.

According to the second aspect of the present invention, the support plate mounting member to which the planetary gear support plate is mounted is divided into a plurality of members in parallel with the axis, and the front end of at least one of the divided portions is fitted with the planetary gear support plate. It has a guide surface to guide, behind it,
The retaining plate has a retaining portion that protrudes outward in the radial direction of the support plate mounting member. Thus, when the planetary gear support plate is fitted to the outside, the divided portion is pressed and pushed into the inner peripheral side by being inserted along the guide surface,
The planetary gear support plate can be easily fitted outside. Therefore, the assembling of the planetary gear support plate is facilitated, the assembling structure of the planetary gear support plate is simplified, and the cost can be reduced.

According to the third aspect of the present invention, the planetary gear support plate is formed so that the inner diameter is smaller than the tip diameter of the sun gear. When the planetary gear support plate is loosely fitted around the support plate mounting member,
The contact area between the outer peripheral surface of the support plate mounting member and the inner peripheral surface of the planetary gear support plate is reduced, and the contact resistance associated with the rotation of the planetary gear support plate is reduced.

Therefore, the rotational power of the planetary gear support plate is increased, and the switching operation of the planetary gears can be performed stably and reliably.

[0020]

[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS. For convenience of explanation, the clockwise direction in FIGS. 1 to 4 is defined as a forward direction, while the counterclockwise direction is defined as a reverse direction.

As shown in FIG. 5, the facsimile apparatus of the present embodiment has a top plate 1, an upper cabinet 2 forming a document guide between the top plate 1, and a lower cabinet containing an optical system unit 4. And 3.

At the side end of the lower cabinet 3, a paper transport mechanism 10 is provided. This paper transport mechanism 10
Is rotated by rotating the document conveying roller 5 shown in FIG.
The original 30 arranged between the original conveying roller and the reading unit 6 is conveyed, and by rotating the platen roller 7, the original 30 is arranged between the platen roller 7 and the recording head 8. The recording paper 40 is transported.

The paper transport mechanism 10 has a motor 11 as a drive source. The motor 11 is capable of rotating forward and backward on a rotating shaft.
2 are installed. As shown in FIGS. 6 and 7, the sun gear 12 is provided with a first planetary gear 13 and a second planetary gear 14 which are individually meshed.

On the other hand, a drive shaft
A motor mounting plate 15 is provided as a source mounting member, and the motor 11 is supported by the motor mounting plate 15. The motor mounting plate 15 is made of an elastic resin, and has a protrusion 16 as a support plate mounting member that protrudes cylindrically around the rotation axis of the motor 11 and is coaxial with the rotation axis of the motor 11. I have.

As shown in FIG. 6, the protruding portion 16 is equally divided into four parts in parallel to the axis, and a gap is provided between each divided part. As shown in FIGS. 8 and 9, claws 35 protruding outward in the radial direction are formed at the distal ends of the two divided portions 17 having a short circumferential length. The claw portion 35 has a guide surface 35a that extends obliquely outward and rearward, and a locking portion 35b that extends inward from the tip of the guide surface 35a. The guide surface 35a guides insertion of a first planet support plate 19 and a second planet support plate 18 to be described later, and the locking portion 35b engages the first planet support plate 19 and the second planet after the insertion. The support plate 18 is locked to prevent slipping.

A second planetary support plate 18 as a planetary gear support plate and a first planetary gear support plate
A planet support plate 19 is rotatably fitted to the outside. As shown in FIG. 6, the first planetary gear 13 and the second planetary gear 1 are provided on the first planetary support plate 19 and the second planetary support plate 18, respectively.
A first guide groove 20 and a second guide groove 21 for rotatably guiding each gear shaft of No. 4 around the rotation axis of the motor 11 are formed. The gear shaft of the first planetary gear 13 is rotatably fitted into and supported by the first guide groove 20. Further, the gear shaft of the second planetary gear 14 passes through the fitting hole 19 b formed in the first planetary support plate 19, and the second guide groove 2
1 is rotatably fitted and supported.

The first planet support plate 19 and the second planet support plate 18 are formed with a first support plate protrusion 19a and a second support plate protrusion 18a which protrude outward, respectively. The first support plate protrusion 19a and the second support plate protrusion 18a can be individually engaged with the support plate lock device 22, as shown in FIG.

The support plate lock device 22 includes a first support plate lock arm 23 and a second support plate lock arm 24, a solenoid 25 acting on the first support plate lock arm 23 and the second support plate lock arm 24, and And a spring 26. First support plate lock arm 23 and second support plate lock arm 2
Reference numeral 4 has a rotation center substantially at the center, and a spring 26 for applying a biasing force in a counterclockwise direction is attached to an end. The other end of the first support plate lock arm 23 has a bent end, and the first support plate protrusion 19a is locked inside the bent portion 23a. The other end of the second support plate lock arm 24 has a contact surface 24a at the tip, and is configured to contact and lock the second support plate protrusion 18a. In addition, the second support plate lock arm 24 includes
An engagement claw 24b protruding in the direction of the solenoid 25 is formed.

The solenoid 25 has a movable shaft 25a which can move forward and backward, and an engaging portion 27 engaged with the engaging claw portion 24b is provided at the tip of the movable shaft 25a. When the solenoid 25 is energized, that is, when the solenoid 25 is turned on, the movable shaft 25a retreats, and when the solenoid 25 is turned off, that is, when the solenoid 25 is turned off, the movable shaft 25a advances by the action of the spring 26. ing.

The first planetary gear 13 and the original conveying roller 5
And the driven gear 29 meshing with the first planetary gear 13
A reduction gear 28 meshed with the driven gear 29 and a transport gear (not shown) meshed with the reduction gear 28 and integrally attached to the document transport roller 5 are rotatably provided. Accordingly, the driving force of the rotating shaft of the motor 11 is transmitted to the document conveying roller 5 via the sun gear 12, the first planetary gear 13, the driven gear 29, the reduction gear 28, and the conveying gear.

Further, between the first planetary gear 13 and the platen roller 7, driven gears 34, 33 and 32, which are sequentially meshed and connected from the first planetary gear 13, A reduction gear 31 that meshes with the reduction gear 31
, And a platen gear (not shown) integrally fitted to the platen roller 7 and rotatably provided. Therefore, the driving force of the rotating shaft of the motor 11 is
2, transmitted to the platen roller 7 via the first planetary gear 13, the driven gears 34, 33, 32, the reduction gear 31, and the platen gear.

Further, the driving force of the rotating shaft of the motor 11 is:
When the sun gear 12 rotates forward, the second planetary gear 14
Is rotated in the normal rotation direction and meshes with the reduction gear 28,
The power is transmitted to the document conveying roller 5 via a reduction gear 28 and a conveying gear.

In the above configuration, each operation of the facsimile apparatus in the transmission mode, the reception mode, the reception system reverse mode, and the copy mode of the paper transport mechanism will be described below. The transmission mode is a mode in which the original 30 is read by the reading unit 6 and the original 30 is transported by rotating the original transport roller 5 in the reverse direction. The receiving mode is a mode in which printing is performed on the recording paper 40 by the recording head 8 and the recording paper 40 is transported by rotating the platen roller 7 in the normal direction. The platen roller 7 is returned from the position of the auto cutter (not shown) to the printing position.
Is a mode in which the recording paper 40 is conveyed in the reverse direction.
The copy mode is a mode in which the transmission mode and the reception mode are simultaneously performed.

First, in the transmission mode, as shown in FIG. 1, the rotation axis of the motor 11 is
Is reversed. Accordingly, the first planetary gear 13 rotates forward. At this time, the gear shaft of the first planetary gear 13 is guided by the first guide groove 20, and the sun gear 12
And the rotation of the gear shaft is restricted within a predetermined range in the first guide groove 20, so that the rotation of the gear shaft causes the first planetary support plate 19 to rotate in the reverse direction of the sun gear 12. The first planetary support plate 19 is provided with a rotating force.
2 rotates in the reverse direction. As a result, the first planetary gear 13
Rotates around the sun gear 12 in the rotation direction of the sun gear 12, and eventually meshes with the driven gear 29, and drives the document conveying roller 7 via the reduction gear 28 and the document conveying gear of the document conveying roller 7. Is transmitted, and the document conveying roller 7 rotates in the reverse direction.
In the above transmission mode, the support plate locking device 2
2 is in the ON state and the first
The engagement between the support plate protrusion 19a and the second support plate protrusion 18a and the first support plate lock arm 23 and the second support plate lock arm 24 is released.

Next, at the time of reception, as shown in FIG. 2, the rotating shaft of the motor 11 rotates forward and the sun gear 12 rotates forward. Accordingly, the first planetary gear 13 rotates in the reverse direction. As a result, the gear shaft of the first planetary gear 13 is
And rotates around the sun gear 12 in the normal rotation direction of the sun gear 12. At this time, since the rotation of the gear shaft is regulated within a predetermined range by the first guide groove 20, the rotation of the gear shaft reduces the force for rotating the first planetary support plate 19 in the forward rotation direction of the sun gear 12. And the first planetary support plate 19 is
In the normal rotation direction. As a result, the first planetary gear 13
Rotates around the sun gear 12 in the normal rotation direction of the sun gear 12, meshes with the driven gear 34, and the driven gear 3
The driving force is transmitted to the platen roller 7 via the reduction gear 31 and the reduction gear 31 and the platen gear of the platen roller 7, and the platen roller 7 rotates forward. At this time, the solenoid 25 is turned off from the operating state of the sheet transport mechanism 10 in the transmission mode, and the movable shaft 25a of the solenoid 25 is moved forward. As a result, the first support plate protrusion 19a is engaged with the bent portion 23a of the first support plate lock arm 23, and the second support plate protrusion 18a is in contact with the contact surface 24a of the second support plate lock arm 24. And is positioned and fixed.

Also, when the receiving system is reversed, as shown in FIG. 3, the solenoid 25 is in the same OFF state as at the time of receiving, and the bent portion 23a and the contact surface 24a of the first support plate lock arm 23 are in contact with each other. It is positioned and fixed in contact. Therefore, at the time of the reception, at the position where the first planetary gear 13 meshes with the driven gear 34 and at the position of the first planetary support plate 19, the rotation axis of the motor 11 is reversed, and the sun gear 1
2 reverses. Accordingly, the first planetary gear 13 rotates forward. At this time, since the first planetary support plate 19 is positioned and fixed in the receiving state, the rotation of the first planetary gear 13 around the sun gear 12 in the reverse direction of the sun gear 12 is restricted. Therefore, the first planetary gear 13 rotates forward at the position where the first planetary gear 13 meshes with the driven gear 34 at the time of reception, so that the first planetary gear 13 is sequentially driven via the driven gears 33 and 32, the reduction gear 31, and the platen gear. The driving force is transmitted to the platen roller, and the platen roller 7 rotates in the reverse direction.

At the time of copying, as shown in FIG. 4, a solenoid 25 constituting the support plate locking device 22 is used.
Is turned on, the first support plate protrusion 19a and the second
The engagement between the support plate protrusion 18a and the first support plate lock arm 23 and the second support plate lock arm 24 is released. In this state, the rotation shaft of the motor 11 rotates forward, and the sun gear 12 rotates forward. Accordingly, the first planetary gear 13 rotates in the reverse direction. At this time, the gear shaft of the first planetary gear 13 is guided by the first guide groove 20 to rotate around the sun gear 12 in the normal rotation direction of the sun gear 12, and the first planetary support plate 19 12 in the normal rotation direction. For this reason, the first planetary gear 1
3 rotates around the sun gear 12 in the normal rotation direction of the sun gear 12 and eventually meshes with the driven gear 34, and in turn, the driven gear 33, 32, the reduction gear 31, and the platen roller 7 via the platen gear. , And the platen roller 7 rotates forward.

On the other hand, at this time, since the support plate lock device 22 that has restricted the rotation of the second planetary support plate 18 releases the restriction, the forward rotation of the sun gear 12 causes the second planetary gear 14 to reversely rotate. At the same time, the gear shaft of the second planetary gear 14 is guided by the second guide groove 21 to rotate around the sun gear 12 in the forward direction of the sun gear 12, and the second planetary support plate 18 Rotates in the forward direction. For this reason, the second planetary gear 14 rotates around the sun gear 12 in the normal rotation direction of the sun gear 12, and eventually meshes with the reduction gear 28, and the reduction gear 2
8. The driving force is transmitted to the document conveying roller 5 via the document conveying gear, and the document conveying roller 5 rotates in the reverse direction.

As described above, the paper transport mechanism 1 of this embodiment
In the case of 0, since the sun gear 12 is provided directly on the rotating shaft of the motor 11, there is no need to provide a gear between the motor 11 and the sun gear 12. For this reason, the number of gears can be reduced, the structure is simplified, and the degree of freedom of gear arrangement is increased. Therefore, the cost can be reduced, and the performance of the paper transport mechanism 10 having one motor 11 as a drive source can be improved.

The first planetary gear 13 and the second planetary gear
14, the first planet support plate 19 and the second planet support plate 18,
The planetary gear mechanism including the projections 16
Since it is supported by the motor mounting plate 15 for mounting,
When attaching the planetary gear mechanism to the rotating shaft of the motor 11
The assembly accuracy is significantly improved.

The motor mounting plate 15 is made of an elastic resin, and has two divided portions 17.
17 are formed, and a claw portion 35 having a guide surface 35a and a locking portion 35b is formed at the tip of the divided portion 17. For this reason, the first planetary support plate 19
When the second planetary support plate 18 is inserted along the guide surface, the divided portion is pressed and pushed inward, so that the first planetary support plate 19 and the second planetary support plate 18 are pressed.
Can be easily fitted and locked. Therefore,
First planet support plate 19, second planet support plate 18 and motor 1
The coaxial structure with 1 can be easily configured,
Conventionally, the cost of the drive system mounting plate has been increased depending on the combination of the sheet metal and the resin shaft, but the cost can be reduced.

[Embodiment 2] A paper transport mechanism of a facsimile apparatus according to another embodiment of the present invention will be described below with reference to FIGS. In addition, for convenience of explanation, the first embodiment
The members having the same functions as the members shown in the drawings of FIG.

As shown in FIGS. 10 and 11, the paper transport mechanism of the facsimile apparatus according to this embodiment rotates the first planetary gear 13 and the second planetary gear 14 around the rotation shaft 41 of the motor 11. A first planetary support plate 43 and a second planetary support plate 42 as planetary gear support plates that are supported by the camera are rotatably provided. The inner radius r of each of the first planetary support plate 43 and the second planetary support plate 42 is formed to be smaller than the tip radius R of the sun gear 12, and the first planetary support plate 43 and the second The planetary support plate 42 is
It is loosely fitted directly to one rotating shaft 41. In addition, the first
Around the gear shafts 44 and 45 of the first planetary gear 13 and the second planetary gear 14 in the planetary support plate 43 and the second planetary support plate 42, these gear shafts 44 and 45 are not eccentric.
Protrusions 46, 47 and 48 are formed on the respective upper sides.

In the above configuration, when the first planetary gear 13 and the second planetary gear 14 rotate, the first planetary support plate 43 and the second planetary support plate 42 also rotate with the rotation. At this time, the first planetary support plate 4 of this embodiment is used.
3 and the second planetary support plate 42 have an inner radius r
The first planetary support plate 43 and the second planetary support plate are formed on the protrusion 16 as a cylindrical support plate attachment member as in the first embodiment, for example. When the protrusion 42 is loosely fitted, the contact area between the outer peripheral surface of the projecting portion 16 and the inner peripheral surfaces of the first planetary support plate 43 and the second planetary support plate 42 becomes small, and the first planetary support plate 43 and the second 2 The contact resistance associated with the rotation of the planet support plate 42 is reduced. For this reason, the rotation power of the first planetary support plate 43 and the second planetary support plate 42 is increased, and the first planetary support plate 43 and the second planetary support plate 42 can easily rotate. Therefore, the switching operation of the first planetary gear 13 and the second planetary gear 14 can be performed stably and reliably.

The other structure and operation are the same as in the first embodiment.

[0046]

As described above, the paper conveying mechanism of the facsimile apparatus according to the first aspect of the invention rotatably supports the planetary gear.
The planetary gear support plate to be held and the planetary gear support plate
Support plate mounting part that can be freely rotated around the rotation axis of the car
Material, a drive source mounting member for mounting the drive source,
Are provided, the sun gear is provided on a rotation shaft of a drive source , and the support plate mounting member is provided with the drive source mounting member.
It is a configuration that is fixed to the attachment member .

This eliminates the need to provide a gear between the driving source and the sun gear, thereby reducing the number of gears. Therefore, there is an effect that the structure can be simplified and the cost can be reduced.

Further , the planetary gear, the planetary gear support plate and the support
A planetary gear mechanism consisting of a holding plate mounting member attaches a drive source
Planetary gear
Compared to the case where the mechanism is mounted on the rotating shaft of the drive source,
There is an effect that the assembling accuracy is improved.

In the paper transport mechanism of the facsimile apparatus according to the second aspect of the present invention, as described above, the sun gear is connected to the rotating shaft of the drive source.
Is provided on the sun gear mounting side of the drive source, a cylindrical support plate mounting member made of an elastic resin is provided coaxially with the rotation axis of the drive source, and the support plate mounting member includes The planetary gear support plate that rotatably supports the planetary gear is rotatably mounted, while the support plate mounting member is divided into a plurality of pieces in parallel with an axis, and the planetary gear support is provided at the tip of at least one of the divided portions. It has a guide surface for guiding the insertion of the plate, and has a retaining portion for preventing the plate from protruding outward in the radial direction of the support plate mounting member behind the guide surface.

This facilitates the assembly of the planetary gear support plate. In addition, there is an effect that the assembling structure of the planetary gear support plate can be simplified, and the accompanying cost can be reduced .

According to a third aspect of the present invention, there is provided a paper transport mechanism for a facsimile apparatus according to the first aspect of the present invention, wherein the planet gear support plate has an inner diameter of a tip of a sun gear. It is a structure formed so as to be smaller than that.

Thus, in addition to the effect of the first aspect of the present invention, the contact resistance associated with the rotation of the planetary gear support plate is reduced. For this reason, the rotational power of the planetary gear support plate increases, and the switching operation of the planetary gears can be performed stably and reliably.
This has the effect.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a sheet transport mechanism of a facsimile apparatus according to an embodiment of the present invention and showing a transmission mode state.

FIG. 2 is an explanatory diagram showing a reception mode state in the paper transport mechanism.

FIG. 3 is an explanatory diagram illustrating a receiving system reverse rotation mode state in the paper transport mechanism.

FIG. 4 is an explanatory diagram showing a copy mode state in the paper transport mechanism.

FIG. 5 is an exploded perspective view showing the facsimile apparatus.

FIG. 6 is a plan view showing a configuration near a sun gear attached to a motor of the paper transport mechanism.

FIG. 7 is a sectional view taken along line AA in FIG. 6;

8 is a sectional view taken along line BB in FIG.

FIG. 9 is a perspective view showing the vicinity of a motor of the paper transport mechanism.

FIG. 10 is a plan view showing a configuration around a sun gear mounted on a motor of a paper transport mechanism of a facsimile apparatus according to another embodiment of the present invention.

11 is a sectional view taken along line CC in FIG.

FIG. 12 shows a conventional example, and is an explanatory view showing a method of switching the driving of a motor by an electromagnetic clutch.

FIG. 13 is an explanatory diagram showing a method of switching the driving of a motor in a conventional paper transport mechanism using a sun gear and a planetary gear, and showing a transmission mode state.

FIG. 14 is an explanatory diagram illustrating a reception mode state in the paper transport mechanism.

FIG. 15 is an explanatory diagram showing a copy mode state in the paper transport mechanism.

[Explanation of symbols]

5 Document Conveying Roller 7 Platen Roller 11 Motor (Drive Source) 12 Sun Gear 13 First Planetary Gear 14 Second Planetary Gear 15 Motor Mounting Plate (Drive Source Mounting Member) 16 Projection (Support Plate Mounting Member) 17 Division 18 2 planet support plate (planet gear support plate) 19 first planet support plate (planet gear support plate) 35 claw portion 35a guide surface 35b locking portion 41 rotating shaft 42 second planet support plate (planet gear support plate) 43 first Planet support plate (planet gear support plate)

Claims (3)

(57) [Claims] A sun gear and a planetary gear meshing with the sun gear are provided in a power transmission path between a drive source capable of rotating and rotating the rotation axis in a normal direction and a reverse direction, and a document conveying roller and a platen roller driven by the drive source. By switching the rotation direction of the drive source, moving the planetary gear around the sun gear, and switching the gear meshing with the planetary gear, the power transmission direction of the drive source is changed to the direction of the document conveying roller and the platen roller. In a paper transport mechanism of a facsimile machine that can be switched between the direction and a direction, a planetary gear support plate that rotatably supports the planetary gear, and the planetary gear support plate that rotates around a rotation axis of a sun gear.
A supporting plate mounting member to be mounted on the vehicle, and a driving source mounting member for mounting the driving source.
And the sun gear is provided on a rotation shaft of a driving source , and
The support plate mounting member is fixed to the drive source mounting member.
Paper transport mechanism of the facsimile apparatus characterized by that. 2. A driving source capable of rotating the rotating shaft forward and backward.
Document Conveying Roller and Platen Driven by Driving Source
Sun gear and this sun gear
A planetary gear that meshes with the car is provided, and the direction of rotation of the drive source is
Switch and move the planetary gear around the sun gear,
By switching the gear that meshes with the gear, the drive source
The power transmission direction is the direction of the document transport roller and the platen roller.
Paper transport of facsimile machine that can be switched between
In the feeding mechanism, the sun gear is provided on a rotation shaft of a drive source, and a cylindrical support plate mounting member made of an elastic resin is coaxial with the rotation shaft of the drive source on the sun gear mounting side of the drive source. The planetary gear support plate that rotatably supports the planetary gear is rotatably mounted on the support plate mounting member, while the support plate mounting member is divided into a plurality of parts parallel to the axis, A guide surface for guiding the insertion of the planetary gear support plate is provided at a distal end portion of at least one of the divided portions, and a retaining portion for retaining is provided behind the guide surface to protrude radially outward of the support plate mounting member. A paper transport mechanism for a facsimile machine, comprising: 3. The paper transport mechanism of a facsimile apparatus according to claim 1, wherein said planetary gear support plate is formed such that an inner diameter is smaller than a tip diameter of said sun gear.