JPH064463B2 - Paper feed roller device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a paper feed roller device in a copying machine or the like, specifically, a paper feed roller device that feeds stacked sheets one by one, or in a conveyance path. The present invention relates to a paper feed roller device such as a conveyance roller device that conveys a sheet in one direction.

(Prior Art) For example, as a paper feed roller device of a copying machine, a paper feed roller device that comes into contact with stacked sheets and feeds the stacked sheets, or a pair of rollers, There is a transport roller device for transporting. The paper feed roller device includes a drive roller device that is driven by receiving a driving force from a drive source and a driven roller device that rotates following the drive roller device.

Of these paper feed roller devices, an example of a paper feed roller device of a copying machine is shown in FIG. 1, and the roller 1 is supported by a support shaft 2. The shaft 2 is rotatably supported by a pair of stationary side plates 3a and 3b via bearings 4a and 4b. The bearings 4a and 4b are restricted from moving in the axial direction by fitting the snap rings 5a and 5b onto the shaft 2.
A gear 6 is fixed to one end of the shaft 2 by a screw 7. A gear (not shown) connected to a drive source meshes with the gear 6.

Such a roller device R needs to be attached to and detached from the side plate for maintenance of the copying machine. Specifically, as shown in FIG. 2, when the roller device R is attached to the side plate, one end 2a of the shaft 2 is inserted into the bearing hole 3c of the side plate 3a, and then the side plate 3b of the other end 2b of the coaxial 2 is inserted. Insert it into the bearing hole 3d in.
Then, the bearing 4a is inserted into one end 2a of the shaft, and then the snap ring 5a is fitted into the groove cut into the shaft. Further, next, the bearing 4b is inserted into the other end 2b of the shaft, and the snap ring 5b is fitted into the groove of the shaft. Then, the gear 6 is fixed to the one end 2a of the shaft with the screw 7. Further, when removing the roller device R from the side plates 3a and 3b, the work is performed in the reverse order. In any case, in such a roller device R, when the roller is also detached from the side plate, the snap rings 5a and 5b, the bearing 4
It is necessary to remove and attach a and 4b from the shaft 2. For this reason, the work efficiency of the roller attachment / detachment was poor. Further, in the roller device R, the snap rings 5a, 5b
It was easy to drop small parts such as Further, in the roller device R, it takes time and effort to store and manage the removed snap rings 5a, 5b and other parts. Although not shown, a guide member for guiding the sheet is provided near the roller device R. In this case, the roller device R could not be attached or detached without removing the guide member.

(Object of the Invention) An object of the present invention is to provide a paper feed roller device which solves the above-mentioned drawbacks of the paper feed roller device, can be easily attached and detached, and has a good work efficiency.

(Structure of the Invention) The present invention relates to a pair of support members arranged at regular intervals, and a bearing provided on one of the pair of support members and detachable from the support member. A bearing fixed to the other support member, a support shaft movably supported in the axial direction between the pair of support members via the bearing, and a roller fixed to the support shaft. A pin fixed to a position between the removable bearing and the roller on the support shaft, and one end of the removable bearing.
An urging means, which is disposed on the support shaft so that the other end abuts on the pin, urges the detachable bearing and the pin in a direction to relatively separate the pin, and the urging means for the pin. By moving the shaft end of the supporting shaft from the bearing fixed to the other supporting member by moving the pin against the biasing means. When the support shaft is removed together with the detachable bearing between the engagement holding means and the support member, the movement of the bearing is prevented from slipping out of the support shaft. The paper feed roller device is provided with a restricting means for restricting.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 9.

The present embodiment is an example in which the present invention is applied to a conveyance roller device of a copying machine, among the paper feed roller devices.

In FIG. 3, the transport roller device H is composed of a driven roller device 10 and a drive roller device 11 which are arranged in a transport path L and rotate in the arrow direction. Drive roller device 11
Is a roller device including a shaft 11a that is driven in the direction of the arrow by receiving a driving force from a driving source (not shown), and a roller 11b fixed to the shaft 11a. A roller 13 that rotates together with the roller 11b is in contact with the roller 11b. The roller 13 and the shaft 12 supporting the roller 13 are driven roller devices.
Make up ten.

The driven roller device 10 is, as shown in FIGS. 4 and 6,
Support shaft 12, frame cutting roller 13, urging means 17, guide member 25, pin 18, holder 22 as engagement holding means, bearing 2
0, a snap ring 23 as a regulating means, and a supporting member (side plate)
15 and 24).

The support shaft 12 is supported by the side plates 15 and 24 so as to be axially movable and rotatable.

A plurality of frame-cutting rollers 13 are fixedly mounted on the support shaft 12 at regular intervals.

The urging means 17 is composed of a spring receiver 19 and a spring 21, as shown in FIGS.

The pin 18 is fixedly planted near the left end portion 12b of the support shaft 12. The pin 18 is formed to have a length that engages with a holding groove 22c of the holder 22, which will be described later.

The spring bridge 19 is provided to the left of the pin 18 and supports the support shaft 12
It is rotatably inserted in. The spring receiver 19 is large enough to receive the end of a spring 21 described later.

The bearing 20 is fitted into the left end portion 12b of the support shaft 12 so as to be movable in the axial direction and rotatable relative to the shaft.
The bearing 20 is composed of a flange portion 20a that serves as a spring receiver when a spring 21 described later is abutted, and an oval fitting portion 20b.

The spring 21 is a support shaft between the spring bearing 19 and the bearing 20.
It is wound around 12, and biases the spring bearing 19 and the bearing 20 in the direction to separate from each other.

The snap ring 23 is fitted into the groove of the left end portion 12b of the support shaft 12 to support the bearing 20 having a movement characteristic.
It works to regulate so that it does not get out of 12.

The holder 22 is inserted into the left end portion 12b of the support shaft 12.
The holder 22 is provided with an oval fitting opening 22a that fits into the fitting portion 20b of the bearing 20 and a holding portion 22b that is bent into an L shape. The holding portion 22b extends in the direction of the pin 18 and has a holding groove 22c. The groove 22c has a width sufficient to fit the pin 18, and includes an opening 22d provided in the axial direction and a locking portion 22e orthogonal to the opening 22d. The groove 22c is formed in an L shape when seen in a plan view. When the pin 18 is engaged with the locking portion 22e, the locking portion 22e has the pin 1
The position of 8 is set so that the lengthwise direction thereof coincides with the longitudinal direction of the fitting portion 20b of the bearing 20. That is, by looking at the direction of the pin 18, the direction of the fitting portion 22b can be known. Therefore, the fitting portion 22b is attached to the side plate 24 described later.
The workability when inserting it into the hole 24a is good. 4 and 6
In the figure, a guide member 25 is provided on the support shaft 12 at a bent portion 25.
It is rotatably supported by the support shaft 12 by a and 25b. Bent portion 25a is located on the guide member supporting portion 12c between rightmost roller 13 _one of the frames out roller 13, a right end portion 12a of the support end, fitted to the shaft snap ring 26a The movement in the axial direction is restricted by (see FIG. 6). The bent portion 25b is a roller 13
Be located in the guide member supporting portion 12e between the leftmost roller 13 ₃ and the pin 18 of the, it is restricted from moving in the axial direction by a snap ring 26b. The guide member 25 has a notch 25c into which a part of the peripheral surface of the frame-cut roller 13 enters.
Are formed. On the right side of the guide member 25,
27 are formed. The holding portion 27 extends in the axial direction from the right side portion of the guide member 25, and its tip end 27a fits into a hole 15a (see FIG. 6) of the side plate 15 described later. A hook-shaped holding portion 28 is formed on the left side of the guide member 25, and a tip 28a of the holding portion 28 is provided on a side plate 24, which will be described later.
Engage 9

The support shaft 12 is rotatably supported by the side plates 15 and 24 as shown in FIG. The side plate 15 has a hole 15b formed therein.
The hole 15b supports the bearing 16 so as to be vertically movable by an appropriate means. In particular, it is held by the snap ring 16a so as not to come off from the side plate 15. The bearing 16 includes the support shaft 12
The right end portion 12a of the is fitted rotatably and freely. Below the hole 15b of the same side plate 15, a hole 15a into which the tip portion 27a of the holding member 27 is fitted is formed.

As shown in FIG. 5, the side plate 24 has a fitting portion for the bearing 20.
A hole 24a into which 20b is fitted is formed. This hole 24a is
The bearing 20 is movably supported in the vertical direction via the fitting portion 20b. This hole 24a is open,
The width X of the open portion 24b is set to be slightly larger than the diameter Y of the support shaft 12. This open portion 24b is provided with a guide member 25.
The support shaft 12 still attached is connected to the window hole 24c having a size sufficient to pass through.

The support shaft 12 is supported by the side plates 15 and 24 as follows. The right end portion 12a of the support shaft is supported by the side plate 15 by being inserted into the bearing 16 fitted in the hole 12b. Left end of support shaft 12
12b is supported by the side plate 24 by fitting the fitting portion 20b of the bearing into the hole 24a. At this time, the tip 27a of the holding portion 27 has a hole 1
It is fitted to 5a. The tip 28a of the holding portion 28 is engaged with the locking piece 29. By thus maintaining both holding portions 27 and 28 in the above-mentioned state, the guide member 25 is kept in the posture forming the transport passage as shown in FIG. Bearing 20
Is abutted against the inner wall of the side plate 24 via the holder 22 by the elasticity of the spring 21. Further, the pin 18 is axially pressed by the elasticity of the spring 21 via the spring receiver 19. When the pin 18 is pressed, the support shaft 12 is given the habit of moving to the right in FIG.
The support shaft 12 is given the habit of moving to the right, but its movement is restricted by the snap ring 23 being stopped by the fitting portion 20b of the bearing.

The driven roller device 10 configured as described above is attached to and detached from the main body of the copying machine according to the following procedure.

First, the procedure for removing the roller device will be described.

As shown in FIG. 6, the support shaft 12 placed at the device position is moved to the left against the elastic force of the spring 21. As a result, the right end portion 12a of the support shaft 12 is pulled out from the bearing, and the holding portion 27
The tip 27a of the is also pulled out from the hole 15a. Tip 28 of holding part 28
a moves while engaging with the restriction piece 29. And pin 1
8 through the opening 22d of the holder 22 into the holding groove 22c,
This is rotated together with the shaft to be engaged with the engaging portion 22e. When the pin 18 is locked to the holder 22, the support shaft 12
Are held in the engaged and held state shown in FIG. That is, the spring 21 is held in a contracted state, and the bearing 20 moves relative to the support shaft, so that the bearing 20 separates from the snap ring 23. Bearing 20 and snap ring 23
The shaft portion 12g of the support shaft is exposed between and.

Next, as shown in FIG. 8, the driven roller device 10 as a whole is tilted to the upper right, the fitting portion 20b of the bearing 20 is removed from the hole 24a, and the shaft portion 12g of the support shaft 12 is inserted into the hole 24a. Move it to the right until it is located. Open this shaft part 12g from the open part 12b to the window hole.
Move to 24c. At this time, the tip 28a of the holding portion 28a separates from the locking piece 29.

After positioning the shaft portion 12g of the support shaft 12 in the window hole 24c,
As shown in the figure, the entire driven roller device 10 is
Pull out from the copier body in the direction of the arrow via c.

To mount the driven roller device 10 on the side plates 15 and 24, work is performed in the reverse order of the above-described removal procedure.

Another embodiment of the present invention will be described with reference to FIGS.

This embodiment shows an example in which the present invention is applied to a feed roller device of a sheet feeding device of a copying machine.

In FIG. 10, the paper feeding device F is composed of a paper feeding cassette 31, a feed roller device 30, a pickup roller 40, and a separation roller device 32.

The paper feed cassette 31 has a movable bottom plate on which a sheet is directly placed.
The bottom plate 31a is pushed down and is pushed up in the direction of the arrow by a push-up member (not shown) according to the level of the uppermost sheet.

The pickup roller 40 is in contact with the leading end of the uppermost sheet, rotates in the direction of the arrow, and sends the sheet to the left.

The feed roller device 30 is a separation roller device 32.
In cooperation with, it works to send sheets one sheet to the left.

The separation roller device 32 has a roller 32a that is rotationally driven in the direction of the broken line arrow by a drive source (not shown) via a torque limiter (not shown). The roller 32a is used when the roller 32a is in direct contact with the feed roller 34, and when the roller 32a and the feed roller 3 are in contact with each other.
When one sheet is sandwiched between 4 and,
When a plurality of sheets enter between the roller 32a and the feed roller 34, the roller 34 is driven by the roller 34 that is rotationally driven in the direction of the arrow to rotate in the direction of the solid arrow, and rotates in the direction of the broken arrow. Then, the sheets other than the topmost sheet are pushed back toward the cassette.

Of these paper feeding devices F, the feed roller device 30 is
As shown in FIG. 11, the feed roller 34, the support shaft 33, the left guide member 41, the right guide member 44, the biasing means 17, the pin 1
8, a holder 22 as an engagement holding means, and a snap ring 23 as a restriction means for restricting the bearing 20 from coming off the shaft.

The feed roller 34 is supported by the support shaft 33 so as to be rotatable in the arrow direction via a one-way clutch. A gear 35 is held adjacent to the feed roller 34 on the support shaft 33 via a one-way clutch. On the left side portion 33e of the gear 35 of the support shaft 33, a bracket 36 has bent portions 36a and 36b.
And is supported so as to be rotatable relative to the shaft.
This bracket 36 has a snap ring 37 for axial movement.
It is regulated by (only one shown). Right fold
Shafts 38a and 39a are fixedly planted on the shaft 36a, and the gear 38 that meshes with the gear 35 is supported on the shaft 38a. Axis 39a
A gear 39 that meshes with the gear 38 and a pickup roller 40 are supported by. When the gear 35 rotates integrally with the support shaft 33, the gears 38 and 39 connected to the support shaft 33 are rotated and the pickup roller 40 rotates in the direction of the arrow to feed the sheet from the cassette.

A left guide member 41 is fixed to the bent hanging portion 36c of the bracket 36. In addition, the feeler 4
2 is fixed. At the tip of this feeler 42, a notch 4
2a is formed. The notch 42a is located on the optical path of the sensor 43 including the light emitting portion 43a and the light receiving portion 43b when the uppermost sheet is at a predetermined level. When the sheet feeding operation is repeated and the pickup roller 40 lowers,
Along with this, the feeler 42 is lowered, and the notch 42a becomes
The optical path is deviated from the optical paths of 3a and the light receiving section 43b and the optical path is blocked by the feeler 42. As a result, the sensor 43 operates and outputs a signal for driving the push-up member that pushes up the bottom plate 31a. When the push-up member pushes up the bottom plate 31a and the notch 42a of the feeler 42 is located on the optical path via the pickup roller 40, the bottom plate pushing-up operation is stopped.

A holding portion 42b is provided above the tip of the feeler 42, and the holding portion 42b is provided with a locking member 58 provided on the side plate.
(See FIG. 10) to engage bracket 36
That is, the left guide member 41 is prevented from swinging downward more than necessary. That is, the holding portion 42b holds the left guide member 41 in a fixed posture.

A biasing means 17, a pin 18, a holder 22 and a snap ring 23, which are similar to those in the above-described embodiment, are provided on the left side portion 33d of the support shaft 33. These means and members have the same configurations as those in the above-described embodiment, and the same members are designated by the same reference numerals and the description thereof will be omitted.

The right guide member 44 is restrained from moving in the axial direction by the snap ring 45, and is supported by the right side portion 33f of the shaft 33 so as to be rotatable relative to the shaft. Right guide member 44
A holding portion 44a extending in the axial direction is provided on the right side of the. The holding portion 44a is for keeping the right guide member 44 in a fixed posture by fitting the tip end 44b thereof into a positioning hole 54 provided in a stationary member described later.

The right end portion 33a of the support shaft 33 has a small diameter, and a step portion 33b is formed. An engagement groove 33c is formed at the shaft end. This right end portion 33a is a drive shaft 49 of a drive means 59 described later.
Take off.

A driving means 59 is provided on the side plate 46 (see FIG. 12) that supports the right end portion 33a of the support shaft 33. This drive means comprises a bracket 48 and a drive gear 50.
The bracket 48 is fixed to the side plate 46 by an appropriate means as shown in FIG. 12, and the side plate 46 rotatably supports the drive shaft 49. This drive shaft 49 has a drive gear 50
Is fixed. A gear 51 rotated by a drive source meshes with the drive gear 50. An engagement hole 52 is formed in one end 49a of the drive shaft 49 so that the right end 33a of the support shaft 33 is engaged with the engagement hole 52. A pin 53 is fixedly implanted in the hole 52 so as to penetrate in a direction perpendicular to the axis. This pin 53
When the right end portion 33a of the support shaft 33 is fitted into the engagement hole 52, the support shaft 33 engages with the engagement groove 33c to rotationally and integrally connect the drive shaft 49 and the support shaft 33. In the bent part of the bracket 48,
Positioning holes 54 are provided. The hole 54 is formed by fitting the tip 44b of the holding portion 44a to the right guide member.
Hold 44 in place.

On the other hand, the side plate 47 is formed with an oval hole 47a into which the fitting portion 20b of the bearing 20 is fitted. In this example, hole 47a
The lower part is open via the open part 47b. The width X of the open portion 47b is set to be slightly larger than the diameter Y of the support shaft 33, as in the above embodiment. The side plate 47 is provided with a window hole 47c which is continuous with the opening portion 47b and allows the support shaft 33 to be taken in and out with all accessories attached.

The support shaft 33 of the feed roller device 30 as described above is supported by the side plate 47 and the drive means 59 as follows.

The left end portion 33d of the support shaft 33 is supported by the side plate so as to be rotatable and axially movable by fitting the bearing 20 into the hole 47a of the side plate 47. The support mode of the support shaft 33 is exactly the same as the support mode of the left end portion of the support shaft 12 in the above-described embodiment (see FIG. 6), and therefore its description is omitted. Also, the support shaft
As shown in FIG. 12, the right end portion 33a of 33 is fitted into and supported by the engagement hole 52 of the drive shaft 49. At this time, the engaging groove 33c
And the pin 53 are fitted together. As a result, the right end portion 33a and the drive shaft 49 of the drive means are rotationally integrated. Further, when the right end portion 33a is fitted into the driving means 59, the tip end 44b of the holding portion 44 is also fitted into the positioning hole 54. As a result, the right guide member 44 maintains a constant posture. The support shaft 33 supported by the side plates 46 and 47 in this manner
Has a habit of moving toward the right end portion by the biasing means, but this habit of movement is prevented by the step portion 33b colliding with the peripheral edge of the engagement hole 52. That is, the support shaft 33, by the abutment of the step portion 33b and the peripheral edge of the engagement hole 52,
Axial position is maintained. In this case, the snap ring 23 fitted to the left end of the support shaft 33 and the end surface of the bearing 20 are separated from each other.

Such a feed roller device 30 can be removed similarly to the driven roller device 10 of the above-mentioned embodiment.

In the case of this embodiment, the right end portion 33a of the support shaft is the driving means 59.
Is detachably supported, a window hole 47c for taking in and out the entire device is provided below the hole 47a for supporting the support shaft 33, and a guide member is divided into right and left parts. It is different from the above embodiment.
Therefore, in this feed roller device 30, the right end of the support shaft can be freely inserted into and removed from the engagement hole of the drive means, and the attachment / detachment can be performed through the window hole below the mounting position. Is different from the embodiment of
Since the attaching / detaching procedure is almost the same, the description of the procedure is omitted.

Although this embodiment describes an example in which the present invention is applied to the feed roller device, the present invention can be applied to the drive roller device 11 (see FIG. 3) and the separation roller device 32 (see FIG. 10). Needless to say.

(Advantages of the Invention) The present invention eliminates the need to remove or attach accessories such as snap rings and bearings provided in a device equipped with a paper feed roller device during maintenance and inspection. The attachment / detachment work of this can be performed easily and quickly. In addition, the fact that it is not necessary to remove accessories such as the snap ring and the bearing from the support shaft means that these items are not dropped into the machine and the storage of these items is also unnecessary. Further, since the present invention has the engagement holding means and the pin,
When attaching or detaching the paper feed roller device, the biasing means can be maintained in the engaged and held state, and it is not necessary to hold the roller support shaft with both hands against the biasing action of the biasing means. It becomes easy to attach and detach. Further, since the support shaft has the supporting portion for supporting the guide member, it is not necessary to provide another member for supporting the guide member. Further, if the paper feed roller device supporting this is removed, the guide member can be removed at the same time. You can

[Brief description of drawings]

FIG. 1 is a front view showing an example of a conventional paper feed roller device,
FIG. 2 is an exploded perspective view of the same, FIGS. 3 to 9 show an embodiment of the present invention, and FIG. 3 is a side view showing an example of a sheet conveying device of a copying machine. FIG. 5 is a perspective view of the driven roller device, FIG. 5 is an exploded perspective view of essential parts of the driven roller device, FIG. 6 is a front view of the driven roller device, and FIGS. 7 to 9 are for explaining a procedure for removing the driven roller device. Front view, FIGS. 10 to 12 show another embodiment of the present invention,
FIG. 10 is a side view showing an example of a paper feeding device, FIG. 11 is a perspective view of a feed roller device, and FIG. 12 is a partial cross-sectional front view showing a main part of the feed roller device. 12, 13 ... Support shaft, 13, 13 ₁ , 13 ₃ ... Frame break roller, 17
... Biasing means, 16,20 ... Bearing, 15,24,4
6, 47 ... Side plate (supporting member), 18 ... Pin, 19 ...
... Spring holder, 21 ... Spring, 22 ... Holder (engagement holding means), 23 ... Snap ring (regulating means), 3
4 ... Feed roller, 48 ... Bracket, 49 ...
Drive shaft, 50 ... Drive gear, 59 ... Drive means.

Claims (4)

[Claims] 1. A pair of support members arranged at a constant interval, and a bearing provided on one of the pair of support members and detachable from the support member. A bearing fixed to the other supporting member, a supporting shaft movably supported in the axial direction via the bearing between the pair of supporting members, and a roller fixed to the supporting shaft. A pin fixed on the support shaft at a position between the removable bearing and the roller, the support shaft having one end contacting the removable bearing and the other end contacting the pin. An urging means disposed above and urging the removable bearing and the pin in a direction in which they are relatively separated from each other; and moving the pin to the removable bearing side against the urging means. Thus, the shaft end of the support shaft is fixed to the other support member. When the support shaft is removed together with the engagement holding means for engaging and holding the pin in a state of resisting the urging means when the support shaft is removed from between the support members, A paper feed roller device, comprising: a restriction unit that restricts the movement of the bearing so that the bearing does not slip out of the support shaft. 2. The paper feed roller device according to claim 1, wherein the support shaft has a support portion for supporting a guide member for guiding the paper. 3. A pair of support members arranged at regular intervals, and a bearing provided on one of the pair of support members and detachable from the support members. Between the pair of support members, a support shaft movably supported in the axial direction via the bearing, a roller fixed to the support shaft, and on the support shaft, the removable shaft. A pin fixed between the bearing and the roller, one end of the removable bearing and the other end of the support shaft disposed on the support shaft so as to abut the pin, and the removable bearing An urging means for urging the pin in a direction to relatively separate from each other, and an urging means for moving the pin toward the detachable bearing side against the urging means, so that the shaft end of the support shaft is moved to the other side. When the pin is removed from the support member, The movement of the bearing is regulated so that the bearing does not come out of the support shaft when the support shaft is removed together with the engagement holding means for engaging and holding as it is and the detachable bearing between the support members. Is provided on the other supporting member of the pair of supporting members, and the supporting shaft is detachably connected to the supporting member. A paper feed roller device, comprising: a rotation transmission means for transmitting a driving force to the support shaft. 4. A paper feed roller device according to claim 3, wherein said support shaft has a support portion for supporting a guide member for guiding the paper.