JPH0472231A - Roll paper feeding device - Google Patents

Abstract

PURPOSE:To prevent a breaking of driving force to a movable main body during the exhaust of roll papers by depressing the movable main body carelessly, by making a locking means lock the movable main body at a specific upper position against a depressing force of the movable main body. CONSTITUTION:Since a locking means 5 itself holds a movable main body 4 at an upper position against the depressing force of the movable main body 4 by a roll paper feeding device 2, ;the movable body 4 has no fear to be depressed carelessly. As a result, during the exhausting of roll papers, a driving force to a driven device 8 of the movable main body 4 is cut off, and there is no fear to make a cutting means 46 to a condition not cutting the roll papers P. On the other hand, when the movable main body 4 is depressed to mount and demount a feeding cassette, the pressing member 61 of a lock releasing means 6 is pushed and operated through an operating button 61a to rotate the hook member 51 of a licking means 6 clockwise against an energizing force of a coil spring 52, and the locking condition;l of the movable main body 4 by the locking means 5 may be released.

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, there has been provided a copying machine in which a roll paper feeder for supplying the paper to the copying machine can be attached externally.

This roll paper feeding device, for example, as shown in FIG.
A movable main body 90 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. 92, a paper feeder 93 that feeds and feeds the roll paper P, and a cutter 94 that cuts the roll paper P fed out by the paper feeder 93 into a predetermined length.

The movable main body 90 moves the roller 95 provided on the movable main body 90 to a guide rail 9 erected on a fixed frame 91.
6, the lifting and lowering is guided. 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 the paper feed cassette 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 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 suppressed downward,
By rotating the hook member 98a clockwise in the figure against the biasing force of the coil spring 98b, the movable main body 90 can be allowed to move downward.

Further, the movable main body 90 includes a driven device that is provided on the fixed frame 91 and receives a driving force from a driving device in order to drive the paper feeding means 93, cutting means 94, etc. 'Power transmission between this driven device and the drive device on the fixed frame 91 side is performed by meshing a gear provided on the input shaft of the driven device with a gear provided on the output shaft of the drive device. Both gears are released from the meshing state by pushing down the movable body 90, and are brought into mesh again by placing the movable body 90 in the raised position.

<Problems to be Solved by the Invention> According to the roll paper feeding device having the above configuration, the hook member 9 of the locking means 98 can be removed by simply pressing the movable main body 90 downward.
8a is rotated to release the locked state. Therefore, if the movable main body 90 is accidentally pushed down even slightly while the roll paper P is being supplied to the copying machine F, the power transmission between the driven device and the drive device on the fixed frame 91 side will be cut off. As a result, the cutting means 94 is no longer driven. in this case,
Pull the roll paper feeder away from copying machine F, and then remove it from copying machine F.
There is a problem in that the post-processing is troublesome and time consuming, as it is necessary to remove the roll paper P supplied to the roll paper feeder or to rewind the roll paper P loaded in the roll paper feeder.

Furthermore, when moving the movable body 90 up and down, especially when the movement is performed with one hand, the movable body 90 tends to be vertically different on both sides of the roll paper P in the axial direction.
There was also the problem that it tended to tilt left and right, making it difficult to move up and down smoothly.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a roll paper feeding device that can prevent the movable main body from being inadvertently pushed down.

Another object of the present invention is to provide a roll paper feeding device that can prevent the movable main body from tilting during elevation and allows the movable body to move up and down smoothly.

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 and feeding the roll paper, and a paper feeding means. A movable main body including a cutting means for cutting the rolled paper into a predetermined length, a fixed frame supporting the movable main body so as to be able to move up and down, and a movable main body having a cutting means that cuts the rolled paper into a predetermined length against a downward pressing force. a locking means for locking in the raised position; and a locking means provided on the fixed frame;
It is characterized by comprising a lock release means for releasing the lock of the movable body by the lock means.

However, the above-mentioned roll paper feeding device has a pair of racks extending vertically arranged in parallel on either one of the movable main body and the fixed frame body, separated by a predetermined distance, and a pair of pinions on the other side. They may be arranged side by side so as to be able to rotate integrally while meshing with the rack.

Further, the locking means includes a hook member that engages with a predetermined portion of the movable body as the movable body rises, and a biasing member that biases the hook member to the engagement position. In this case, the lock release means may include a pressing member that presses the hook member against the urging force of the urging member, and a stopper member that maintains the pressed state of the hook member by the pressing member. It may be something that does.

According to the roll paper feeding device configured as described above, the movable body can be locked in a predetermined raised position by the locking means against the downward pressing force, and this locked state can be maintained by the fixed frame. It can be unlocked by the lock release means provided in the. Therefore, the movable body cannot be pushed down unless the lock release means is operated, and it is possible to prevent the movable body from being inadvertently pushed down.

In addition, a pair of racks extending vertically on either the movable body or the fixed frame are installed side by side with a predetermined distance between them, and a pair of pinions on the other side are meshed with the rack and can rotate together. When the racks and pinions are arranged in parallel, the amount of elevation on both the left and right sides of the movable body can be equalized, thereby preventing the movable body from tilting.

Further, the locking means includes a hook member that engages with a predetermined portion of the movable body as the movable body rises, and a biasing member that biases the hook member to an engaged position, and the locking means However, when the hook member is provided with a pressing member that presses the hook member against the urging force of the urging member, and a stopper member that maintains the state in which the hook member is pressed by the pressing member, the hook member may be pressed by the pressing member. By pressing, the locking state of the movable body by the hook member can be released, and the pressing state of the hook member, that is, the unlocked state can be maintained by the stopper member. Therefore, it is possible to lift and lower the movable body with both hands without releasing the lock release means.

<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. The roll paper feeding device 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 erected 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. Near the four upper and lower corners of the elevating frame 42, there are A roller 41 that can freely roll is attached to 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 3 that urge 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. Further, the movable main body 4 is provided with a loading section 44 for the roll paper P, and above the loading section 44 for the roll paper P are a paper feeding means 45 for feeding and feeding the roll paper P, and a paper feeding means 45 for feeding the roll paper P, and A cutting means 46 for cutting the paper P into a predetermined length is provided. The paper feeding means 45 sandwiches the roll paper P between a pair of rollers 45a and feeds out the roll paper P, and the cutting means 46 uses a rotary blade 46a and a fixed blade 46b to feed the roll paper P. It is intended to cut.

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 between the engaging member 51b and the support shaft 41a is prevented. A taper portion 51C is formed to automatically perform the process. The engagement groove 51b of the hook member 51 is connected to the movable main body 4.
Even when the movable main body 4 is pressed downward, a horizontal receiving portion 51d is provided which comes into contact with the lower surface of the support shaft 41a in order to resist the pressing force and hold the movable main body 4 in the raised position.

Further, the fixed frame 3 is provided with a lock release means 6 corresponding to the lock means 5 for releasing the locked state of the movable body 4 by the lock means 5. This lock release means 6 includes a hook member 51 of the lock means 5.
The hook member 51 is provided with 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 pressed state of the hook member 51 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 pressing member 61, and a pin 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 62 of the upper end corner thereof
b 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 62b of the stopper member 62 is provided.
A recessed portion 61C that engages with is provided. The engaging portions 62b and the recesses 61C are engaged with each other when the pressing member 61 is pressed and the hook member 51 is disengaged 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 for forcibly releasing the engagement between the engaging portion 62b and the recess 61C of the pressing member 61 is formed.

Racks 37 extending in the vertical direction are arranged in parallel 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 bottom of both left and right sides of the movable body 4.
7 is provided. 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 input shaft 81 on the driven device 8 side. The output gear G1 and the input gear G2 are disengaged as the movable main body 4 descends, and are maintained in the engaged state again as the movable body 4 ascends.

According to the roll paper feeding device 2 having the above configuration, the locking means 5 itself holds the movable body 4 in the raised position against the downward force of the movable body 4, so that the movable body 4 may not be pushed down inadvertently. There is no risk of being exposed. I wanted to roll paper P.
There is no possibility that the driving force of the movable main body 4 to the beating device 8 will be cut off during the ejection of the roll paper P, and that the cutting means 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 suppressing member 61 engages with its recess 61c or the engaging portion 62b of the stopper member 62, and is regulated to be pushed back to the right in FIG. 4.

Therefore, even if you release your hand from 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 body 4, it is sufficient to push down the movable body 4 with the other hand while pressing the operation button 61a of the suppressing 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 hand.

However, if the stopper member 62 is configured, the movable main body 4 can be pushed down with both hands, so the rack 37 and pinion 47 are not necessarily required.

The roll paper feeding device of the present invention is not limited to the above-mentioned embodiment. For example, the lock release means 6 may be configured to suppress the pressing member 61 by a rotary lever, and the pinion 47 may be mounted on a fixed frame. Rack 37
Various design changes can be made, such as providing the movable body 4 on the movable main body 4 side.

<Effects of the Invention> As described above, according to the roll paper feeding device of the present invention, the movable body can be locked in a predetermined raised position by the locking means or against the downward pressing force of the movable body. Because there is
It is possible to prevent the movable body from being inadvertently pushed down and cutting off the drive transmission to the movable body during ejection of the roll paper. Therefore, there is no possibility that the roll paper will not be cut.

Further, according to the roll paper feeding device according to claim 2, since the rack and the binion can prevent the movable body from tilting from side to side when going up and down, the movable body can be raised and lowered smoothly even by one-handed operation. I can do it.

Furthermore, according to the roll paper feeding device according to claim 3, since the unlocked state of the movable body in the raised position can be maintained by the stopper member, the user can release the lock release means and use both hands to release the movable body. can be raised and lowered. Therefore, the horizontal inclination of the movable body can be easily suppressed, and as a result, the movable body can be smoothly raised and lowered.

[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 structure; FIG. 6 is a perspective view showing the roll paper feeding device installed in the copying machine; FIG. 7 is a conventional example. Cross-sectional view, FIG. 8 is also an enlarged cross-sectional view of the main part. P... Roll paper, 3... Fixed frame body, 37... Rack, 4... Movable main body, 44... Roll paper loading section, 4
5... 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.

Claims (1)

[Claims] 1. A movable device comprising 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 by the paper feeding means into a predetermined length. a main body; a fixed frame that supports the movable main body so as to be movable up and down; a locking means for locking the movable main body in a predetermined raised position against downward pressure; and a locking means provided on the fixed frame; 1. A roll paper feeder comprising: a lock release means for releasing the lock of the movable body by the means. 2. A pair of racks extending in the vertical direction are arranged side by side on one of the movable body and the fixed frame, separated by a predetermined distance, and a pair of pinions are meshed with the rack on the other side. The roll paper feeding device according to claim 1, wherein the roll paper feeding devices are arranged side by side so as to be integrally rotatable. 3. The locking means includes a hook member that engages with a predetermined portion of the movable body as the movable body rises, and a biasing member that biases the hook member to the engaged position, and the lock release means includes: The roll paper feeding device according to claim 1, further comprising: a pressing member that presses the hook member against the urging force of the urging member; and a stopper member that maintains the state in which the hook member is pressed by the pressing member.