JPH03223039A - Paper feeding device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention comprises: a paper feed tray on which sheets are stacked; a lifting mechanism that raises the paper feed tray until the topmost sheet reaches the paper feed position; The present invention relates to a paper feeding device that is ideal for high-speed printing machines, etc., and includes a paper feeding means for feeding paper that has reached a paper feeding position.

(Prior Art) A paper feeding device for placing stacked sheets of paper in a conventional copying machine, printing machine, etc. has the following functions: A deck-type paper feeding device (Japanese Patent Laid-Open No. 55-5692
7, Utility Model Application Publication No. 55-17065).

(2) A paper feed device in which a deck-type paper feed table is stacked in two layers (upper and lower) in the paper feed section of the main body of the device (Special Publication No. 50-3896)
Publication No. 8).

(3) A cassette-type paper feeding device (Japanese Utility Model Publication No. 52-36930) in which stacked papers are stored in a paper cassette and this paper cassette is attached to a paper feeding section of the main body of the device.

(4) A combination type paper feeding device that selectively uses a deck type paper feeding table and a cassette type paper feeding table (Japanese Patent Laid-Open No. 54-4173
Publication No. 4).

etc. are known.

In general, it is well known that in devices such as copying machines that feed paper under certain conditions, the paper feeding device has multiple paper cassettes and paper feeding trays stacked one on top of the other. The configuration is such that one is selected and fed.

In the case of such a paper feed device in a copying machine, the structure is somewhat complicated, such as a curved paper conveyance path, but paper misfeeding or paper jams are relatively rare.

However, in devices such as printing machines, where the paper used for printing is not constant and needs to be fed with a wide variety of paper such as thin paper and thick paper, the paper conveyance path is complicated, such as in copying machines. If thin paper is fed, non-feeding will occur, and if thick paper is fed, jam will occur.

For this reason, in most ordinary printing presses, many paper feeding devices are equipped with only one paper feeding tray, and the paper conveyance path thereof is also formed in a straight line.

(Problem to be Solved by the Invention) By the way, as mentioned above, the paper feed device in a conventional printing machine is equipped with only one paper feed table, so it is difficult to handle paper of different sizes or paper types during printing. When changing the paper, it was necessary to first stop the apparatus and replace the paper.

For this reason, in the conventional apparatus, there is a problem in that the work is temporarily interrupted when replacing the paper, and the work efficiency is reduced.

To solve this problem, a paper feeding device has been proposed in which a plurality of paper feeding trays are equipped with casters to make them movable, and the paper feeding trays containing desired sheets of paper are fixed to a printing machine. However, in a printing machine with such a configuration, since the paper picture table is independent, it is difficult to position the paper feeding table when the printer is attached to the main body, and the work efficiency has not yet been improved.

The present invention has been made in view of the above-mentioned points, and its first purpose is to solve the above-mentioned conventional problems and to prevent paper from not being fed or jammed even when multiple paper feed trays are used. The objective is to provide a paper feeding device that does not

Incidentally, it is desirable that a paper feed table in a printing machine or the like be able to simultaneously load a large amount of different types of paper, and also be able to easily select and replace paper types and maintain and manage the paper.

However, although the conventional paper feed tray (1) above can load a large amount of paper, it only has one paper storage section, so it is difficult to change the paper type (size, thickness, etc.). , it is necessary to take out the paper stored in advance before loading the next paper to be used, and it is difficult to manage the paper that has been taken out. In a situation where automation of operations is progressing, you are wasting your time and effort.

Further, in the paper feed tray described in (2) above, the space in the vertical direction of the paper feed portion of the main body of the apparatus is limited.

When using the lower paper feed tray, it is necessary to empty the upper paper feed tray, making it impossible to automate the selection of the paper feed tray. It takes a lot of time and effort, as it requires the initiative.

Furthermore, the paper feed tray described in (3) above cannot accommodate a large amount of paper at a time due to the configuration and weight limitations of the paper cassette, and when paper cassettes are arranged in multiple stages, A corresponding paper means is required for each paper cassette.

Further, the paper feed tray in (4) above is used only as an auxiliary device, as in the case of the paper feed tray in (3) above, since the paper cassette cannot accommodate a large amount of paper.

As described above, the above-mentioned conventional paper feed tray cannot load a large amount of different types of paper at the same time, and also has difficulties in automating the paper tray selection operation and reducing the space occupied by the paper feed tray. was.

A second object of the present invention is to solve the above-mentioned problems, to be able to simultaneously load a large amount of different types of paper, to automate the selection operation of the paper feed tray, and to reduce the space occupied by the paper feed tray. The object of the present invention is to provide a paper feeding device that can achieve the following objectives.

(Means for Solving the Problems) In order to solve the above-mentioned problems and achieve its first object, the present invention provides a paper feed tray on which sheets are stacked and a A base fixed to a main body of the device in a paper feeding device including a lifting mechanism that raises the paper feeding platform until the paper reaches the paper feeding position, and a paper feeding means that feeds the paper that has reached the paper feeding position. and a movable base mounted so as to be movable in a direction perpendicular to the paper feeding direction with respect to the base, and the movable base has the above-mentioned independent lifts in the direction perpendicular to the paper feeding direction. A plurality of the paper feed trays each having a mechanism are arranged in parallel, and the paper on the selected paper feed tray is fed by the paper feed means.

In order to solve the above-mentioned problems and achieve the second object, the present invention also provides a pedestal that is formed at the lower part of the paper feeding section of the apparatus main body, and a pedestal that is substantially perpendicular to the paper feeding direction of the apparatus main body. a paper feed base disposed so as to be movable reciprocally with respect to the pedestal in a direction; a base driving means for reciprocating the paper feed base with respect to the pedestal; A first paper bottom plate for stacking the arranged first paper sheets, and a portion of the paper feed base adjacent to the first paper bottom plate along the moving direction of the paper feed base, which is movable up and down. a second paper bottom plate for stacking the arranged second paper sheets; a first bottom plate elevating means for raising and lowering the first paper bottom plate relative to the paper feeding means of the apparatus main body; and the paper feeding means. a second bottom plate elevating means for raising and lowering the second paper bottom plate; and a second bottom plate elevating means for raising and lowering the second paper bottom plate; A first movement in which a sheet of paper arranged approximately vertically faces a guide side plate and a side surface of the paper guide side plate on the side of the first paper bottom plate and is movable towards and away from the paper guide side plate. a second movable side plate facing a side surface of the paper guide side plate near the second paper bottom plate and movable toward and away from the paper guide side plate; a first paper center detected member that faces the center position between the paper guide side plate and the first moving side plate by moving in conjunction with the side plate and following a movement distance of 1/2 of the first moving side plate; , a second paper center facing the center position of the paper guide side plate and the second movable side plate by following the movement distance of 172 of the second movable plate in conjunction with the second movable side plate. A member to be detected and a member disposed in a movement path of the first and second paper center detected members at a central position of the paper path of the paper feeding portion, and configured to detect the first or second paper center detected member. The paper center position detection means detects the position and outputs a base stop signal.

(Function) According to the configuration according to claim 1 of the present invention, since the plurality of paper feed trays are delivered in parallel to a movable table mounted movably in a direction orthogonal to the paper feed direction, a plurality of paper feed trays are delivered in parallel. The sheets of paper on the sheet feeding table are fed by the same sheet feeding means.

Further, according to the configuration according to claim 2 of the present invention, the first and second paper bottom plates for placing paper are fed on the pedestal formed at the lower part of the paper feeding portion of the main body of the apparatus. The paper feed base is moved back and forth in a direction substantially perpendicular to the paper direction, and the center position of the first and second paper stacked on each paper bottom plate faces the center position of the paper feed path. Movement of the platform is stopped.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

However, in order to avoid complicating the explanation, illustrations and disclosures thereof will be omitted to avoid complicating the explanation, as well as the configuration and operation within the range that can be clearly recalled from the description of this specification, as well as the above-mentioned and other objects and novel features of the present invention. , or simplify it.

First, a first embodiment of the present invention according to claim 1 will be described based on FIGS. 1 and 2.

In FIGS. 1 and 2, a fixed base 1 serving as a base for a paper feeding device is fixed to the main body of an offset printing press.

On this fixed base 1, there is a movable base 2 as a movable base.
is mounted so as to be slidable in the direction of arrow A in FIG. 1 by a pair of sliders 16.

The direction of arrow A is perpendicular to the sheet feeding direction, which will be described later.

On the movable base 2, two paper feed tables 3 and 4 are arranged substantially horizontally in parallel along the direction of arrow A.

Note that the height and horizontality of the fixed base 1 can be adjusted using an adjuster bolt 17.

Each paper feed tray 3, 4 has sheets 7.0 stacked thereon.
8, and each paper 7, 8.
The side fences 9 and 10 are movable according to the respective paper sizes.

Further, above each paper feed tray 3, 4, a paper feed means consisting of a paper feed roller 11 and the like provided on the main body of the printing machine is arranged.

In this embodiment, the paper feed roller 11 is arranged at a predetermined position, and one of the paper feed trays 3 and 4 is configured to be moved below the paper feed roller 11. ing.

FIG. 1 shows a state in which the paper feed table 3 has been moved below the paper feed roller 11 and is now facing a position where paper can be fed.

Furthermore, the movable base 2 is configured to be movable within a range that allows each of the paper feed trays 3 and 4 to face their respective paper feed positions.

That is, the movable base 2 is movable between a position where the paper feed table 3 is a position where paper can be fed and a position where the paper feed table 4 is a position where paper can be fed.

Now, let us assume that the size of the paper 7 loaded on the paper feed tray 3 is A3 size, and the size of the paper 8 loaded on the paper feed tray 4 is A4 size, and as shown in FIG. Assume that it is located at a possible position.

At this time, if you want to print on A3 size paper 7,
Since the paper table 3 is already located at the position where paper can be fed, printing can be performed as is.

Furthermore, when it is desired to print on A4 size paper 8, the movable base 2 is moved to the right in FIG. 1, and the paper feed table 4 is set at a position where paper can be fed.

Here, when printing is started, the paper 7 loaded on one of the paper feed trays 3 and 4, for example, the paper feed tray 3, is lifted up by the lifting mechanism 5, as shown by the broken line in FIG. It is raised to the paper feeding position where it contacts the paper feeding roller 11.

Then, the paper 7 is sequentially fed one by one from the top paper by a paper feed roller 11, and is conveyed by being gripped between an impression cylinder 13 and a blanket cylinder 14 at a predetermined timing by a pair of registration rollers 12.

At this time, ink is transferred from the blanket cylinder 14 to the paper to perform printing, and then the paper is discharged onto the paper discharge table 15.

The paper feed device configured in this manner can save the effort of replacing the paper with the paper feed tray, and therefore its workability is greatly improved.

Further, according to this paper feeding device, on both paper feeding trays 3°4,
By sorting and stacking the paper you want to print in advance, even if one paper feed tray runs out of paper, you can switch to the other paper feed tray and continue printing. While using the paper tray, it is also possible to replenish the other paper table that has run out of paper with new paper.

Furthermore, according to this paper feeding device, even if two paper feeding trays 3 and 4 are provided, only one paper feeding path is required for each paper, so the paper feeding path is not complicated and there is no paper waste. This eliminates the possibility of feeding or jamming.

In the above embodiment, a paper feeding device is shown in which two paper feeding trays are provided on the movable base 2, but although there are some problems in terms of space, the paper feeding device of the present application has two paper feeding trays. Two or more units may be provided.

Further, as the means for moving the movable base 2 in the above embodiment, for example, it may be configured to have a handle like a drawer and be moved manually, or it may be moved electrically using a drive source such as a motor. It may be configured to move.

Further, as the means for moving the moving base 2 in the above embodiment, the above-mentioned manual moving means and electric moving means may be appropriately switched and used.

Next, a second embodiment of the present invention according to claim 2 will be described based on FIGS. 3 to 12.

As shown in FIGS. 3 to 9, the paper feeding device of this embodiment includes a pedestal 110. A paper feed base 20 is arranged to be able to reciprocate with respect to the pedestal 110 in a direction (horizontal direction in FIG. 3) perpendicular to the paper feed direction of the apparatus main body 100 (direction perpendicular to the plane of paper in FIG. 3). This paper feed base 20
a base driving means 30 that reciprocates with respect to the pedestal 110;
゜The first paper bottom plate 40A is arranged to be able to rise and fall on the paper feed base 2o, and the first paper bottom plate 40A is moved up and down onto the paper feed base 20 at a portion adjacent to the first paper bottom plate 40A along the movement direction of the paper feed base 20. The second paper bottom plate 40B is freely arranged.

A paper guide inverted plate 50A (50B) disposed substantially vertically along the paper feeding direction on the paper feeding base 20 at an intermediate portion between the first paper bottom plate 40A and the second paper bottom plate 40B; A first movable side plate 60A facing the side of the first paper bottom plate 40A of the side plate 50A and movable toward and away from the paper guide side plate 50A, and a second paper bottom plate of the paper guide side plate 50B. A second movable side plate 60B facing the side surface of the paper guide side plate 50B is arranged so as to be movable towards and away from the paper guide side plate 50B. The paper guide side plate 50A and the first moving side plate 6 are moved by a following movement distance of /2.
First paper center detected member 70 facing the center position with 0A
A. The second movable side plate 60B moves in conjunction with the second movable side plate 60B to follow the movement distance of 1/2 of the second movable side plate 60B, so that the second movable side plate 60B faces the center position of the paper guide side plate 50B and the second movable side plate 60B. The second paper center detected member 70B, the first paper center detected member 70B at the center position of the paper path of the paper feeding portion 101A. The first and second paper center detected members 70A are disposed on the movement path of the second paper center detected member 70A (70B).
(70B) and outputs a base stop signal.

In the paper feeding device configured as described above, first, in FIGS. 3 and 4, for example, small-sized paper PA is placed on the first paper bottom plate 40A, and paper PA of small size is placed on the second paper bottom plate 40B. , for example, large-sized sheets PB are stacked.

Each of the sheets PA, PB is stacked with one side of each sheet in contact with the sheet guide side plates 50A, 50B, and the other side of each sheet is stacked with the first side. Second moving side plates 60A, 60
B are brought into contact with each other, so that each first . Second paper bottom plate 40A.

Positioning on 40B is performed.

Next, placed on the operation panel of the device main body 100,
A paper bottom plate 40A that is used by operating a paper selection key, a numeric keypad (not shown), and the like.

40B, the number of copies to be printed, etc. are set.

Here, when the setting is made to feed the small size paper PA, as shown in FIG. 3, the paper base 20 starts moving by the base driving means 30, and The center of the direction is the center position C of the paper path of the paper feeding section 101A.
-C, the paper feed base 20 is moved and stopped.

Details of this stopping operation of the paper base 2o will be described later.

In this state, when the print start key (not shown) is turned on, the first bottom plate 40A is raised by a well-known first bottom plate elevating means (not shown), and the small-sized paper stacked thereon is lifted. The uppermost sheet of paper PA is placed in the paper feeding section 101A of the apparatus main body 100 in the paper feeding means 10.
1B (paper feeding roller), this paper feeding means 10
1B is operated at predetermined intervals, and the paper PA is transferred to the main body 1 of the apparatus.
The sheets are sequentially fed one by one toward the processing section (impression cylinder, photoreceptor, etc.) of 00.

Here, the first bottom plate elevating means is, as is well known, the paper P
As A decreases, the first paper bottom plate 40A is sequentially driven to raise the paper PA to face the feeding portion of the paper feeding means 101B (the second bottom plate lifts and lowers the second paper bottom plate 40B). means are similarly driven).

Then, when the number of processed sheets of paper PA reaches the set number,
Driving of the paper feeding means 101B and the first bottom plate elevating means is stopped.

On the other hand, in the state shown in FIG.
When the paper selection key for feeding the large-sized paper PB placed on paper B is turned on, first, the first bottom plate elevating means is driven, and the small-sized paper PA is transferred to the paper feeding means 101B.
released from the delivery site.

Next, the base driving means 30 is driven in the same manner as described above,
The paper feed base 20 is moved toward the right in FIG.

Here, the base driving means 30 in this embodiment includes a driving pulley 31, a driven pulley 32, as shown in FIG.
A belt 33 is passed between these two breasts 31 and 32.
and a connecting member 34 that connects the belt 33 and the paper feed base 20, and the drive pulley 31 is rotated in forward and reverse directions by a drive source (not shown).

Therefore, in FIG. 3, when large size paper PB is selected, the drive pulley 31 is rotated clockwise in conjunction with the operation of the paper selection key, and the paper is fed via the belt 33 and the connecting member 34. The base 20 is moved to the right on the pedestal 110.

Then, in the same manner as in the case of the small size paper PA described above, by moving the paper feed base 20 to the right, the center of the large size paper PB in the width direction is moved to the center of the paper path of the paper feed portion 101A. When the position C-C is reached, the rotation of the drive pulley 31 is stopped and the movement of the paper feed base 20 is stopped.

In this way, the large-sized paper PB is moved to a position corresponding to the paper feeding portion 101A of the apparatus main body 100, as shown in FIG.

Hereinafter, this paper PB will be processed in the same way as paper PA.
When the print start key is turned on, the bottom plate is raised by the second bottom plate lifting means until it contacts the paper feeding means 101B,
The set number of sheets is sequentially fed one by one by the drive of the sheet feeding means 101B.

By the way, the above-described control of stopping the movement of the paper feed base 20 is performed by the first paper center detected member 70A, the second paper center detected member 70B, and the paper center position detection means 80.

That is, the first paper center detected member 70A (or the second paper center detected member 70B).

First moving side plate 60A (or second moving side plate 60B)
) in conjunction with the movement (usually operation) of this moving side plate 60.
Follow the movement distance of 172 of A (60B),
As shown in FIG. 4, it is configured to face the center position between the paper guide side plate 50A (or 50B) and the movable side plate 60A (60B), that is, the center position in the width direction of the paper PA (or PB). (Details below).

On the other hand, the paper center position detection means 80 detects the paper feed position 1 of the moving path of the above-mentioned paper center detected member 70A (70B).
It is arranged in advance at the center position C-C of the paper path 01A, and is configured to detect the paper center detected member 70A (70B) and output a base stop signal.

Therefore, when a large size paper PB is selected in the state shown in FIG. 3, as the paper feed base 20 moves to the right in FIG. , move in the same direction (see Figure 5).

When this second paper center detected member 70B is detected by the paper center position detection means 80 (see FIG. 6),
That is, the center of the paper PB in the width direction is the paper feeding portion 101A.
When the center position of the paper path coincides with the center position C-C of the paper path, the paper center position detection means 80 outputs a base stop signal.

This base stop signal is, for example, given to a control means (microcomputer, etc.) built in the apparatus main body 100, and a command to stop the drive of the drive pulley 31 is issued via this control means. Movement of the paper base 20 is stopped.

Further, when a small size paper PA is selected in the state shown in FIG. 4, as the paper feed base 20 moves to the left in FIG. 4, the first paper center detected member 70A , move in the same direction (see FIG. 7), and this first paper center detected member? OA is detected by the paper center position detection means 80 (
(see Figure 6), that is, the small size paper PA
When the center of the paper feed base 20 in the width direction coincides with the center position C-C of the paper path, a base stop signal is output and the movement of the paper feed base 20 is stopped in the same way as in the above case (see Fig. 3). reference).

By the way, in such movement control of the paper feed base 20, in light of the loaded amount of sheets FA and PB, even after the power supply to the drive source is stopped, the paper feed base 20 remains oriented in the direction of movement due to inertia. There is a high possibility of an overrun.

Such an overrun of the paper feed base 20 causes the paper PA,
This causes misalignment between the center position of PB and the center position C-C of the paper feed path, causing skew of the sheets PA and PB and misalignment of printed (copied) images.

For this reason, it is necessary to control the movement stoppage of the paper feed base 20 extremely accurately.

Therefore, as shown in FIG. 6, the paper center position detecting means 80 in this embodiment includes a first sensor 80A and a second sensor 80A and a second sensor that are arranged close to each other on the left and right, sandwiching the center position C-C of the paper feeding path. It is composed of two sensors: sensor 80B.

The base stop signal is sent to both of these sensors 80A and 80A.
It is set to output when 0B is turned on at the same time.

Further, this paper center position detection means 80 is in the state shown in FIG. 6, that is, both sensors 80A.

80B is turned on at the same time, the paper feed base 20
The paper feed base 2
It has a function of identifying the moving direction of o.

Therefore, for example, when paper PB is selected as described above, the paper center detected member 70B moving to the right as shown in FIG.
0A and 80B, a base stop signal is output to stop the movement of the paper feed base 20, and if the inertia overruns the paper feed base 20 to the position shown in FIG.
In the figure, since the second sensor 80B is turned off before the first sensor 80A, it is recognized that the paper feed base 20 has overrun to the right, and a reverse rotation command is issued to the drive pulley 31. give.

As a result, the paper feed base 20, that is, the second paper center detected member 70B, is returned from the position shown in FIG. 5 to the position shown in FIG. 6.

If this return movement causes the paper feed base 20 to overrun again to the left side in FIG.

Since the first sensor 80A is turned off before the second sensor 80B, the overrun direction is determined and the drive pulley 31 is rotated normally again.

In this way, the paper feed base 20 is stopped with the widthwise center of the paper PB very accurately aligned with the center position CC of the paper feed path.

This movement stop control of the paper feed base 20 is performed extremely strictly even when paper PA is selected, as in the case of paper PB.

By the way, the paper P loaded on each paper bottom plate 40A, 40B
The sizes of A and PB are arbitrarily selected.

Therefore, the paper PA (PB) of any size is placed in the paper feed area 101A with the center position in the width direction of the paper PA (PB) exactly aligned with the center position C-C of the paper feed path.
(PB), paper bottom plate 40A (40
No matter what size of paper is loaded in B), it is necessary to position each paper center detection member 70A, 70B at the center of the paper feeding path [C-C].

Therefore, in this embodiment, each paper center detected member 70A,
70B is configured to follow the movement of each movable side plate 60A, 60B by a distance of 172 of the moving distance of the movable side plate 60A, 60B.

That is, as shown in FIGS. 8 and 9, the first movable side plate 60A is disposed approximately perpendicularly to the movable block 61A through the side plate guide hole 41A bored in each paper bottom plate 40A. .

The moving block 61A is slidably supported by a guide shaft 62 arranged parallel to the moving direction of the paper feed base 20.

At the bottom of this moving block 61A, there is a moving rack 63A.
is fixed.

A pinion 71A is engaged with this movable rack 63A.

Further, this pinion 71A is meshed with a fixed rack 21A that is parallel to the movable rack 63A.

This fixed rack 2LA is fixed to the upper surface of the paper feed base 20.

The pinion 71A is pivotally installed on a detected member moving plate 72A that is slidably disposed through a long hole 22A on the upper surface of the paper feed base 20.

A first sheet-centered detected member 70A is arranged at the end of the detected member moving plate 72A.

Here, the movable rack 63A, the fixed rack 21A, and the elongated hole 22A are configured to be parallel to the guide shaft 62A, respectively.

Further, the width of the detected portion of the first paper center detected member 70A is determined by the width of the detected portion of the first paper center detected member 70A.
It is formed to have the minimum necessary width to be detected by A and 80B.

Further, the center position of the detected portion of the first paper center detected member 70A is as shown in FIG.

When the maximum separation distance between the first movable side plate 60A and the paper guide side plate 50A is f, the separation distance from the paper guide side plate 50A to the center of the detected portion is set in advance to be f/2.

Therefore, in the first paper center detected member 70A configured as described above, for example, in FIG. 9, if the first movable side plate 60A is moved by an arbitrary distance S in the direction of the arrow, the pinion 71A is According to the principle of a movable pulley, it is moved by a distance of -8 in the direction of the arrow.

This pinion? The LA is substantially integrated with the first paper center detected member 70A via a detected member moving plate 72A that is slid along the long hole 22A.

Therefore, due to the movement of the pinion 71A, the first paper center detected member 70A is moved by a distance -8 in the same direction following the movement of the first movable side plate 60A.

As a result, the center position of the detected member of the first paper center detected member 70A is located at the first movable side plate 60
The distance g from the moving position of A to the paper guide side plate 50A is (f, -8), and from the paper guide side plate 50A to the center position of the detected part, f-8=g.
x=-g, and the center position of the detected portion is located exactly at the center of the paper guide side plate 50A and the first movable side plate 60A.

Here, since the distance S is an arbitrary value, the center position of the detected portion of the first paper center detected member 70A depends on the size of the arbitrary paper PA stacked on the first paper bottom plate 40A. Also, it faces the center position of the paper PA in the width direction.

On the other hand, although the moving directions of the second moving side plate 60B and the second paper center detected member 70B are opposite, the above-mentioned first moving side plate 60A and the first paper center detected member 7
It has the same configuration as 0A.

Incidentally, printing machines and the like equipped with this type of paper feeding device are generally provided with a fine adjustment mechanism for finely adjusting the position of the paper feeding device.

Conventional fine-adjustment mechanisms were configured to move the paper feeder by manually rotating an adjustment handle or adjustment knob placed on the paper feeder (Utility Model No. 55-16033).
8, Utility Model Application Publication No. 13638/1983).

For this reason, in order to make fine adjustments to conventional paper feeding devices, the operator must move to the paper feeding device each time to perform the operation, and the adjustment displacement amount is also displayed on a scale plate located on the paper feeding device. There were difficulties in its operability, as it was carried out by

On the other hand, in this embodiment, as is clear from the above description, the first. Second paper center detected member 70A, 70B
By shifting the detection position in the left-right direction with respect to the center position C-C of the paper feed path of the paper feed portion 101A, the widthwise center position of each paper PA, PB can be easily displaced.

The fine adjustment mechanism of the paper feeding device in this embodiment will be explained below.

As shown in FIG. 10, this fine adjustment mechanism includes each sensor 80A of the paper center position detection means 80.

Sensor base 81 where 80B (photo sensor) is placed
．． Support frame 82. It is composed of a drive motor 832, a position detection sensor 84, and the like.

In FIG. 10, the sensor base 81 is connected to the paper feed base 20.
The support frame 82 is slidably disposed along a guide groove 82a formed in the pedestal 110 and the support frame 82 in parallel to the moving direction of the support frame 82.

The drive motor 83 is disposed on the support frame 82 and is driven to rotate in forward and reverse directions by a fine adjustment key on an operation panel (not shown).

A worm 83a is fixed to the rotating shaft of the drive motor 83, and a worm wheel 83b meshes with the worm 83a.

The worm wheel 83b is parallel to the guide groove 82a,
A support shaft 8 rotatably supported by a support frame 82
It is fixed at 6.

A feed screw 86a is formed on the extending portion of this support shaft 86, and this feed screw 86a is connected to a bracket 88 that is substantially integrated with the sensor base 81 by a pin 87 fitted in a guide groove 82a. is screwed into the

Further, a position detection plate 89 is fixed to the end of the support shaft 86 near the worm wheel 83b, and a position detection sensor 84 is arranged on the rotation path of this position detection plate 89.

Here, the pitch of the feed screw 86a is set to 1 m, and when the feed screw 86a rotates once, the position detection plate 89 passes once through the detection optical path of the position detection sensor 84, and is separated from the position detection sensor 84. An on/off signal is obtained.

Therefore, in this fine adjustment mechanism, by operating the fine adjustment key on the operation panel and rotating the drive motor 83 in forward and reverse directions, the feed screw 86a of the support shaft 86 is rotated via the worm 83a and the worm wheel 83b. and bracket 8
8. The position of each sensor 80A, 80B of the paper center position detection means 80 is determined via the pin 87 and the sensor base 81.
It can be displaced along the moving direction of the paper feed base 20.

Here, each sensor 80A, 80B moves 1 m by one rotation of the feed screw 86a.

In addition, one pulse signal is obtained from the position detection sensor 84 every time each sensor 80A, 80B moves 1 cm, so that the center position C-C of the paper feeding portion 101A of the apparatus main body 100 is
Each sensor 80A.

Set the position where the center position of 80B matches as the origin.

By displaying the value of pulse number x feed screw pitch (1+m) from the position detection sensor 84 on the operation panel,
The amount of displacement of each sensor 80A, 80B, that is, the amount of fine adjustment of the paper feeding device, can be centrally controlled using the operation panel.

Here, as a means for detecting the origin position of each sensor 80A, 80B, a sensor base 81 as shown in FIG.
An origin detection plate 9o is fixed to the origin detection plate 9o, and an origin sensor 91 is arranged along the movement path of the origin detection plate 9o.

This origin sensor 91 is activated by moving the sensor base 81 in the direction of the arrow in FIG.
Each sensor 80A, 80B is arranged so that the position where the position detection plate 89 stops with a signal that shields the position detection sensor 84 for the first time from the moment when the sensor 1 is turned on (the optical axis is transmitted) becomes the origin of each sensor 80A, 80B.

By the way, in the above embodiment, the two left and right first and second paper bottom plates 40A and 40B are configured so that they can each load the maximum size of paper, so only one type of paper is used. When printing (copying) a large amount of paper continuously, load the same type of paper on both paper bottom plates 40A and 40B, and when the feeding of one paper is completed,
The paper feed base 20 can be automatically moved to continue feeding the paper stacked on the other paper bottom plate, and the printing machine (copying machine) can continue to operate.

Further, in this paper feeding device, while the paper on one paper bottom plate is being fed, the paper on the other paper bottom plate can be replenished or replaced.

Further, according to this paper feeding device, as shown in FIG. 12, if the first paper bottom plate 40A is preformed to a size that is used exclusively for small-sized paper, the paper feeding device main body can be The occupied space can be reduced.

(Effects of the Invention) As described above, according to the configuration according to claim 1 of the present invention, it is possible to save time and effort such as replacing paper, and there is no need to stop printing even while paper is being replenished, which improves work efficiency. Since a large amount of paper can be prepared in advance and the paper transport path is not complicated, it is possible to prevent paper from not being fed or jamming.

Further, according to the configuration according to claim 2 of the present invention, it is possible to simultaneously load a large amount of different types of paper, and furthermore, it is possible to automate the selection operation of paper, and it is also possible to realize a reduction in the occupied space. can.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of a paper feeding device showing a first embodiment of the present invention, FIG. 2 is a schematic side view of a printing press equipped with the paper feeding device of the first embodiment, and FIG. FIG. 4 is a schematic front view of a paper feeding device showing a second embodiment of the present invention; FIG. 4 is a schematic front view showing the operation mode of the paper feeding device of the second embodiment; FIGS.
The figure is an explanatory diagram of the operation of the detection means in the paper feeder of the second embodiment, FIG. 8 is a perspective view of main parts of the paper feeder of the second embodiment, and FIG. 9 is an explanation of the operation of the paper feeder of the second embodiment. FIG. 10 is a perspective view of the fine adjustment mechanism in the paper feeding device of the second embodiment,
FIG. 11 is a perspective view of the origin position detection means in the fine adjustment mechanism, and FIG. 12 is a schematic front view of still another embodiment of the present invention. 1...Fixed base, 2...Moving base, 3゜4...
・Paper feed tray, 5, 6... Lifting mechanism, 7, 8... Paper,
9, 10...Side fence, 11...Paper feed roller, 20...Paper feed base, 30...Base driving means, 40
A. First paper bottom plate, 40B... Second paper bottom plate, 50A, 50B... Paper guide plate, 60A... First moving side plate, 60B... Second moving side plate, 70A・
...First paper center detected member, 70B... Second paper center detected member, 80... Paper center position detection means,
100... Apparatus main body, 101A... Paper feeding part, 10
1B...Paper feeding means, 110...Shelf (1 other person) Nzu Ward 1 %5 (2) Nzu Brother 7 Ward

Claims (1)

[Claims] 1. A paper feed tray on which sheets are stacked, a lifting mechanism that raises the paper feed tray until the topmost sheet on the paper feed tray reaches the paper feed position, and In a paper feeding device equipped with a paper feeding means for feeding the paper that has reached the destination, there is a base fixed to the main body of the device, and a base mounted movably in a direction perpendicular to the paper feeding direction with respect to the base. The moving table has a plurality of sheet feeding trays each equipped with an independent lifting mechanism arranged in parallel in a direction perpendicular to the paper feeding direction, and the paper on the selected sheet feeding tray is arranged in parallel. A paper feeding device characterized in that the paper is fed by the paper feeding means. 2. A pedestal formed at the bottom of the paper feeding section of the apparatus main body, a paper feeding base disposed so as to be movable back and forth with respect to the pedestal in a direction substantially perpendicular to the paper feeding direction of the apparatus main body, and this feeding base. a base driving means for reciprocating the paper base with respect to the pedestal;
A first paper bottom plate for stacking a first paper arranged movably up and down on the paper feed base, and a portion adjacent to the first paper bottom plate along the moving direction of the paper feed base. a second sheet bottom plate for stacking a second sheet of paper disposed on the sheet feed base so as to be freely raised and lowered; and a first sheet bottom plate for lifting and lowering the first sheet bottom plate relative to the sheet feeding means of the apparatus main body. a second bottom plate elevating means for elevating and lowering the second paper bottom plate with respect to the paper feeding means; and the paper feeder at an intermediate portion between the first paper bottom plate and the second paper bottom plate. A sheet of paper arranged substantially perpendicularly along the paper feeding direction on the base faces the guide side plate and the side surface of the paper guide side plate on the side of the first paper bottom plate, and moves toward and away from the paper guide side plate. a first movable side plate disposed movably; and a second movable side plate movably disposed toward and away from the paper guide side plate, facing the side surface of the paper guide side plate on the side of the second paper bottom plate. The movable side plate moves in conjunction with the first movable side plate to follow the moving distance of 1/2 of the first movable side plate, thereby reaching the center position between the paper guide side plate and the first movable side plate. The facing first paper center detected member moves in conjunction with the second movable side plate to follow the moving distance of 1/2 of this second movable plate, thereby causing the paper guide side plate and the second movable member to move. a second paper center detected member facing the center position with the side plate; and a second paper center detected member disposed in the movement path of the first and second paper center detected members at the center position of the paper path of the paper feeding section; 1st
Alternatively, a paper feeding device comprising a paper center position detection means for detecting a second paper center detected member and outputting a base stop signal.