JPH0472232A - Roll paper feeding device - Google Patents

Abstract

PURPOSE:To move a movable main body up and down smoothly even by operating with a single hand, by preventing the lateral inclination of the movable main body in the up and down movement by racks and pinions. CONSTITUTION:At the left side and the right side at the rear side of a fixed frame body 3, racks 37 extending up and down are provided side by side, and at the lower side at the left side and the right side of a movable main body 4, pinions 47 to gear with the racks 37 are provided. And the pinions 47 are fixed rotatable integrally to both ends of a holding shaft 41b to which an up and down frame 42 is inserted parallel to the axial line of the roll papers P to hold a roller 41 at the lower and rear side. As a result, the up and down movement amounts at the left side and the right side of the movable main body 4 can be made equal by the racks 37 and the pinions 47. Therefore, a lateral inclination of the movable main body 4 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a roll paper feeding device for supplying roll paper to an image forming apparatus such as an electrostatic copying machine or a facsimile machine.

<Prior Art> Conventionally, in an image forming apparatus such as an electrostatic copying machine, especially a large copying machine capable of copying large originals such as AO size, roll paper is fed out and cut into predetermined lengths. However, a roll paper feeder for supplying the copying machine to the copying machine is provided which can be attached externally.

This roll paper feeding device, for example, as shown in FIG.
A movable main body 9o loaded with roll paper P is supported by a fixed frame 91 connected to a copying machine F so as to be able to rise and fall freely. A section 92, a paper feeding means 93 for feeding the roll paper P along the edge thereof, and a cutting means 94 for cutting the roll paper P fed out by the paper feeding means 93 into a predetermined length are provided.

The movable body 90 moves the rollers 95 provided on the movable body 9o to the guide rails 9 erected on the fixed frame 91.
It is guided up and down by rolling along 6. Further, a fluid-filled damper 97 is interposed between the movable body 90 and the fixed frame 91 to balance the weight of the movable body 90, and the movable body 90 resists the biasing force of the damper 97. By pushing it down to a predetermined lower position, a paper feed cassette (not shown) can be attached to and detached from the inside of the copying machine F.

Furthermore, as shown in FIG. 8, the roll paper feeding device is provided with a locking means 98 for locking the movable main body 90 in the raised position. This locking means 98 is rotatably supported by the fixed frame 91, and as the movable body 90 rises, a hook member 98a engages with a predetermined portion of the movable body 90, for example, a support shaft 95a of the roller 95. and a coil spring 98b as a biasing member that constantly biases the hook member 98a to the engagement position. According to this locking means 98, as the movable main body 90 is pressed downward, the hook member 98a resists the biasing force of the coil spring 98b.
By rotating clockwise in the figure, the movable main body 90 can be allowed to move downward.

<Problems to be Solved by the Invention> According to the roll paper feeding device configured as described above, when the movable main body 90 is raised and lowered, particularly when the raising and lowering operation is performed with one hand,
There is a problem in that the movable main body 90 tends to have a vertical difference on both sides in the axial direction of the roll paper P, that is, the movable main body 90 tends to tilt left and right, making it impossible to move up and down smoothly.

This invention was made in view of the above problems, and
It is an object of the present invention to provide a roll paper feeding device that can prevent a movable main body from tilting while going up and down, and can smoothly go up and down.

Means for Solving the Problems> To achieve the above object, the roll paper feeding device of the present invention includes a roll paper loading section, a paper feeding means for feeding the roll Fahrenheit, and a paper feeding means. A movable main body having cutting means for forcefully straightening the unrolled roll paper to a predetermined length is connected to the movable main body by a fixed frame (thereby a roll paper feeding device supporting the roll paper so as to be able to rise and fall freely). A pair of pinions extending in the vertical direction are arranged side by side with a predetermined distance apart, and a pair of pinions are engaged with the rack and rotate integrally on the other side. They are installed in parallel if possible.

<Function> According to the roll paper feeding device configured as described above, when the movable body is raised and lowered, the rack and pinion can equalize the amount of elevation on both the left and right sides of the movable body, so that the movable body can move horizontally. It can prevent it from tilting.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 6 is a perspective view showing a copying machine F equipped with the roll paper feeding device 2 of the present invention. The copying machine F is capable of copying large originals such as Al size and AO size.
A paper feed cassette G is loaded inside, and the front side of the horizontally long copying machine main body 1 is equipped with a wide document insertion slot 12, a paper insertion slot 10, and a paper output port 13, and the same wide document transport slot is provided on the top surface. It is equipped with means 14, and includes a roll paper feeding device W.
2 is provided on the front side of the copying machine main body 1.

The roll paper feeding device 2 is supported by a fixed frame 3 attached to the front side of the copying machine main body 1 via a connecting member 21 (see FIG. 1), and can be raised and lowered by the fixed frame 3. It is composed of a movable main body 4.

Referring also to FIG. 5, the fixed frame body 3 includes a bottom frame 3.
A vertical frame 32 is provided upright on both the left and right sides of the bottom frame 31, guide rails 33 are provided on both the front and rear sides of the vertical frame 32, and casters 35 are installed at the four corners of the lower part of the bottom frame 31.
is provided.

As shown in FIGS. 1 and 2, the movable main body 4 is provided with an elevating frame 42, and near the four upper and lower corners of the elevating frame 42, the elevating frame 42 is provided along the guide rails 33 of the fixed frame 3. A roller 41 that can freely roll or a support shaft 41a,
They are attached via 41b, 41c, and 41d, respectively. Of the above-mentioned support shafts, the support shafts 41a and 41b on the back side
are provided parallel to the axis of the roll paper P in a state where the lift frame 42 is inserted, and the support shafts 41c, 4 on the front side
1d is provided perpendicularly to the axis of the roll paper P. A tie rod 34 as a handle is installed at the front of the lift frame 42, and by pulling the tie rod 34 toward you, the front of the lift frame 42 is opened and the roll paper P can be loaded. ing. Also,
A pair of fluid-filled dampers 43 for urging the movable main body 4 upward are rotatably connected to both left and right sides of the lower portion of the lifting frame 42 . The lower end of this fluid-filled damper 43 is rotatably connected to the bottom frame 31 of the fixed frame 3. Furthermore, the movable main body 4 has a roll paper P.
A loading section 44 is provided, and the roll paper P
Above the loading section 44, there are provided a paper feeding means 45 for feeding and feeding the roll paper P, and a cutting means 46 for cutting the roll paper P into a predetermined length. The paper feeding means 45 is
The roll paper P is sandwiched between a pair of rollers 45a and the roll paper P is fed out, and the cutting means 46 includes:
The rotary blade 46a and the fixed blade 46b cut the roll paper P.

Referring to FIGS. 1 to 4, the raised position of the movable main body 4 is defined by a position regulating member 36 provided on the fixed frame 3. As shown in FIGS. Further, the downward movement of the movable main body 4 is regulated by a locking means 5 provided near the position regulating member 36. The locking means 5 is
A hook member 51 is provided on either the left or right vertical frame 32 of the fixed frame 3 and is rotatably supported with respect to the fixed frame 3 around a support shaft 51a. In FIG. 1, it has a coil spring 52 as a biasing member that constantly biases rotation counterclockwise. An engagement groove 51b is formed near the lower end of the hook member 51 to engage with the support shaft 41a that supports the roller 41 on the upper rear side of the movable main body 4. By coming into contact with the support shaft 41a when the movable main body 4 rises, the hook member 51 is rotated against the biasing force of the coil spring 52, and the engagement groove 51b and the support shaft 4]a are engaged with each other. A tapered portion 51C is formed to automatically perform the mating. The engagement ti 5 l b of the hook member 51 is caused by the support shaft 41 . to hold the movable body 4 in the raised position against the pressing force even when the movable body 4 is pressed downward. a
A horizontal receiving portion 51d that comes into contact with the lower surface of is provided.

Further, the fixed frame body 3 is provided with lock release means 6 for releasing the locked state of the movable body 4 by the lock means 5 in correspondence with the lock means 5. This lock release means 6 includes a hook member 51 of the lock means 5.
The hook member 61 includes a pressing member 61 that presses and rotates the hook member 51 against the biasing force of the coil spring 52, and a stopper member 62 that maintains the state in which the hook member 51 is suppressed by the pressing member 61.

An operation button 61a exposed on the front side of the fixed frame 3 is provided at one end of the suppressing member 61, and a bottle 5 protruding from the side surface of the hook member 51 is provided at the opposite end.
A contact portion 61b that contacts 1e is provided.

On the other hand, the stopper member 62 is attached to the support shaft 6 relative to the fixed frame 3.
2a, and is constantly biased to rotate clockwise in FIG. There is.

Furthermore, the stopper member 62 is connected to the hook member 51 and the support shaft 4.
In the engaged state with 1a, the engaging portion 6 at the upper end corner
2b is pressed by the lower surface of the pressing member 61 and rotated counterclockwise (see FIG. 3). Further, on the lower surface of the pressing member 61, an engaging portion 62 of the stopper member 62 is provided.
A recessed portion 61c that engages with b is also provided. The engaging portions 62b and the recesses 61c are engaged with each other by pressing the pressing member 61 to disengage the hook member 51 from the support shaft 41a of the roller 41 (see FIG. 4). ).

Further, the stopper member 62 is arranged such that immediately after the movable main body 4 in the raised position is pushed down, the stopper member 62 comes into contact with the roller 41 and rotates against the coil spring 63. A cam surface 62c is formed for forcibly releasing the engagement between the engaging portion 62b and the recess 61c of the pressing member 61.

Racks 37 extending in the vertical direction are arranged on both left and right sides of the back side of the fixed frame body 3, and pinions 4 that mesh with the racks 37 are provided at the lower portions of both left and right sides of the movable body 4.
There are 7. Each pinion 47 is rotatably fixed to both ends of a support shaft 41b through which an elevating frame 42 is inserted parallel to the axis of the roll paper P in order to support the roller 41 on the lower back side. Therefore, by the rack 37 and pinion 47, when the movable body 4 is raised and lowered, the amount of elevation on both the left and right sides of the movable body 4 can be made equal. That is, it is possible to prevent the movable main body 4 from tilting to the left or right.

Furthermore, as shown in FIGS. 1 and 2, a drive device 7 whose drive source is a motor 71 is provided within the vertical frame 32 of the fixed frame 3, and the driving force of this drive device 7 is is transmitted to a driven device 8 provided on the movable body 4. Transmission of the driving force of the drive device 7 is performed by meshing an output gear G1 attached to the output shaft 72 of the drive device 7 with an input gear G2 attached to the human power shaft 81 on the driven device 8 side. These output gear G1 and input gear G2 are released from the meshing state as the movable body 4 descends, and are maintained in the meshing state again as the movable body 4 rises.

The roll paper feeding device 2 configured as described above holds the movable body 4 in the raised position against the pushing down force of the locking means 5 itself or the movable body 4, so there is a risk that the movable body 4 may be pushed down inadvertently. It's fleeting. Therefore, while the roll paper P is being discharged, there is no possibility that the driving force of the movable main body 4 to the driven device 8 will be cut off and the cut unit 46 will not be able to cut the roll paper P.

On the other hand, in order to push down the movable main body 4 in order to attach and detach the paper feed cassette G, the pressing member 61 of the lock release means 6
by pressing the button 61a provided at one end of the hook member 5 of the locking means 5.
1 in the clockwise direction against the biasing force of the coil spring 52 to release the locked state of the movable body 4 by the locking means 5 (see FIG. 4). In this unlocked state, the pressing member 61 engages with its concave portion 61C or the engaging portion 62b of the stopper member 62, and is prevented from being pushed back to the right in FIG.

Therefore, even if the user releases the operation button 61a of the pressing member 61, the unlocked state can be maintained. Immediately after the movable main body 4 is pressed down, the roller 41 comes into contact with the cam surface 62c of the stopper member 62,
The stopper member 62 is rotated counterclockwise against the biasing force of the coil spring 63, whereby the pressing member 6
1 and the stopper member 62 is released, and the pressing member 6
1 is returned to the right in FIG.

Note that the stopper member 62 can also be implemented without being provided. In this case, in order to push down the movable main body 4, it is sufficient to push down the movable main body 4 with the other hand while pressing the operation button 61a of the pressing member 61. At this time, the rack member 37 and pinion 47 prevent the movable body 4 from tilting to the left or right, so the movable body 4 can be pushed down smoothly even with one-handed operation.

The roll paper feeding device of the present invention is not limited to the above-described embodiment, and various design changes may be made, such as providing the pinion 47 on the fixed frame 3 side and the rack 37 on the movable main body 4 side. It is possible to administer.

<Effects of the Invention> As described above, according to the roll paper feeding device of the present invention, the rack and pinion can prevent the movable body from tilting from side to side when going up and down. It also has the unique effect of being able to move up and down smoothly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view from the side showing an embodiment of the roll paper feeding device of the present invention, FIG. 2 is a sectional view from the top, and FIGS. 3 and 4 are locking means and unlocking means. FIG. 5 is a schematic diagram showing the internal configuration; FIG. 6 is a state in which the roll paper feeding device is installed in a copying machine.
FIG. 7 is a sectional view showing a conventional example, and FIG. 8 is an enlarged sectional view of the main part. P... Roll paper, 3... Fixed frame, 37... U4
...Movable main body, 44...Roll paper loading section, 45...
- Paper feeding means, 46... Cutting means, 47... Pinion, 5... Locking means, 51... Hook member, 52... Coil spring as biasing member, 6... Lock release Means, 61...pressing member, 62...stopper member. Tsuku,

Claims (1)

[Claims] 1. A movable main body having a roll paper loading section, a paper feeding means for feeding and feeding the roll paper, and a cutting means for cutting the roll paper fed out by the paper feeding means into a predetermined length, is attached to a fixed frame. In the roll paper feeding device supported by a movable main body and a fixed frame, a pair of racks extending in the vertical direction are arranged side by side with a predetermined distance apart on one of the movable main body and the fixed frame, and on the other side, A roll paper feeding device characterized in that a pair of pinions are arranged side by side so as to be integrally rotatable while meshing with the rack.