JPS62171839A - Automatic feeder for sheetlike article - Google Patents

Abstract

PURPOSE:To make miniaturization as a whole and positive delivery operation both performable, by shifting a sheetlike article to the front of delivery in proportion as it goes to an upper part in a state of making a paper feed board tilt frontward, and situating a driving source for vertical motion of the paper feed boardin space between the paper feed board and a refeed board. CONSTITUTION:Front ends of a paper feed board 4 and a support member 5 are connected together in a long hole 3b, to be tilted frontward, installed in a side plate 3a of a machine frame via a screw 7. And, two vertical support rollers 8a and 8b installed in the support member 5 are situated in a lifting guide plate 9 installed in a rear end of the side plate 3a, and this guide plate 9 is installed in parallel with the long hole 3b. Therefore, the paper feed board 4 is shifted frontward in proportion as it goes upward as being left tilted frontward intact. In addition, an operating member 40 for vertical motion of the paper feed board is installed in space between the guide plate situated in a front end of the paper feed board and restart rollers 34a and 34b and in the machine frame beneath a delivery mechanism 10. With this constitution, delivery motion is surely performable and, what is more, the whole body can be miniaturized.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic feeding device for sheet-like materials, and in particular, to an automatic feeding device for sheet-like materials, and in particular, to an automatic feeding device for sheet-like materials, and in particular for feeding a large number of sheet-like materials in order from top to bottom. This invention relates to an automatic feeding device for sheet-like materials.

[Prior art]

Generally, it is used in recording devices such as electrophotographic copying machines and simple printing machines, and in feeding devices for sheet-like materials such as transfer paper, photosensitive paper, printing paper, etc., the upper part of the sheet-like material stacking member is A large number of sheet-like objects are placed, and the stacked sheet-like objects are moved from top to bottom using a rotating feed roller (belt), other air suction system, or an electrostatic suction system.
The sheets are fed in the order of their address, and after being fed out one by one, the sheet loading member is raised one after another, so that it is always maintained at a substantially constant standard height in relation to the sheet feeding mechanism. This allows the stacked sheets to be fed to the last one.

Normally, as a sheet stacking member, several cassettes capable of accommodating about 200 to 250 sheets of transfer paper for a normal electrophotographic copying machine were provided at the bottom of the cassette.

And the ones mentioned above, and furthermore, 500 to 200
As a device that can accommodate about 0 pieces of sheets, Japanese Patent Publication No. 29279 of 1972 and Japanese Patent Publication No. 202 of 1972
Publication No. 00, Japanese Patent Publication No. 11663 of 1988, Publication of Japanese Patent Publication No. 25345 of 1988, and Publication of Utility Model Publication No. 1983-336
There is an elevating paper feed tray system shown in the above publications, but in all of them, the driving source for raising and lowering the elevating paper feed tray is placed below or beside the elevating paper feed tray.

[Problem that the invention seeks to solve]

Therefore, in the case of the above-mentioned one using the skein-71 method, it is possible to use ordinary transfer paper for, for example, an electrophotographic copying machine, as described above.
There is a limit to the capacity of about 250 sheets, and as equipment such as electrophotographic copying machines and simple printing machines increase in speed, it is necessary to frequently replenish sheet-like materials, resulting in extremely low work efficiency. In addition, if the cassettes are multi-tiered, the storage capacity of sheet-like objects can be increased, but it is necessary to provide a feeding mechanism and a guide plate for each cassette, and as a result, it is difficult to accommodate sheet-like objects. The problem was that a large amount of space was required compared to the quantity.

Furthermore, it is possible to increase the capacity of one cassette, but if the storage capacity of the cassette is increased, the leading edge of the loaded sheet will be moved from the bottom of the cassette to the position of the feeding mechanism as the loaded sheet goes from the upper layer to the lower layer. However, it is very difficult to do this with high precision, and this may result in paper feeding failures such as no-feed, double-feed, bending, or timing errors. This had the problem of causing

Furthermore, in the case of elevating feeding and feeding systems that can achieve a large capacity, the paper refeed roller (registration roller) and elevating feeding table are separate units and can be maintained while attached to an electrophotographic copying device, etc. Therefore, if a paper jam occurs, it is difficult to dispose of it, and
There were problems in that the paper feeding section was large, the number of assembly steps was large, the efficiency of the assembly work was poor, and the overall size was increased depending on the position of the drive source. Therefore, in order to miniaturize the device, the drive source must be provided at a separate location, making the mechanism complicated.

This invention solves the problems of the conventional ones as described above, and makes maximum use of the limited space of recording devices such as electrophotographic copying machines and simple printing machines, and, for example,
It is smaller than the conventional cassette type even if it accommodates a large amount of sheet-like materials of 500 to 3000 sheets or more, and
By ensuring that the feeding conditions for sheet-like materials are always stable and uniform from the upper layer to the lower layer, paper jams are prevented from occurring, and even if a jam occurs, the entire sheet can be pulled out. , it is possible to easily perform the processing, and furthermore, it is possible to perform the assembly easily, reducing the number of assembly steps and increasing the efficiency of the assembly work.Moreover, the loading section on which the sheet-like object is placed is located at the front. Since it moves forward as it rises in an inclined state, it is possible to reduce the overall height and width, making the whole compact. It is an object of the present invention to provide an automatic feeding device for sheet-like materials that can prevent shifting.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is an automatic feeding device for sheet-like materials attached to the main body of a recording device, etc., which is moved up and down by a drive source and whose rearward direction in the feeding direction of the sheet-like material is moved up and down by a drive source. A paper feed table that is tilted upward and moves forward in the feeding direction of the sheet-like material as it rises in the tilted state; There is a feed-out section that feeds the sheet-like objects in order from the topmost sheet-like object, and it starts and stops in accordance with the timing of the recording device, etc. in order to send out the sheet-like objects sent out from this feed-out section again. and a sheet refeeding section, and the driving source is disposed between the sheet feeding table and the sheet refeeding section.

[Effect]

By adopting the above-mentioned means, this invention allows the drive source to be located between the paper feed tray and the paper refeeding section, so the entire structure can be lowered and made smaller. It is possible to reliably prevent objects from shifting from each other.

〔Example〕

Embodiments of the invention shown in the drawings will be described below.

The drawing shows an automatic sheet feeding device according to the present invention. First, the automatic sheet feeding device, which is the upper unit, will be explained. This automatic sheet feeding device has the following features: An elevating sheet feeding table section 1 that loads a plurality of sheets and moves up and down; a feeding section 10 that sequentially feeds out the sheets stacked on the elevating sheet feeding sheet section 1 starting from the highest sheet; It also has a paper refeeding section 35 that temporarily waits for the shaped material and feeds it out at a predetermined timing.

The elevating paper feeding table section 1 can be pulled out horizontally from a machine table 2 of an electrophotographic copying machine, etc., and has side plates 3 on both sides.
A has a paper feed stand 4 located above a machine stand 3 of an automatic feeding device for sheet-shaped materials that is set upright, and this paper feed stand 4 has a side plate 3a on both sides thereof that is higher than the side plate 3a of the machine stand 3. It is connected to the rear end of the support member 5 located on the outside through a screw 6, and the front end of the support member 5 is connected through a screw 7 in a forwardly inclined elongated hole 3b provided in the side plate 3a. A part of the side plate 3a of the machine stand 3 is located between both ends of the paper feed stand 4 and the support member 5.

Further, two support rollers 8a and 8b in the vertical direction rotatably provided inside the support member 5 are connected to the side plates 3 of the machine base 3.
By being located in the lift guide plate 9 which is parallel to the elongated hole 3b at the outer rear end of the paper feed tray 4, the paper feed tray 4 remains in its initial forwardly inclined state and moves upward as it moves upward. While moving forward, it is guided by a lift guide plate 9 and can move up and down.

The positional relationship between the two upper and lower support rollers 8a, 8b with respect to the paper feed table 4 is as shown in FIG.
If the distance between 8b and the rear end of paper feed table 4 is b, then a:b=1
:1 to 1:1.2.

A feeding section 10 is provided in the upper part between the side plates 3a of the machine stand 3 and in front of the sheet feeding table 4, and the feeding section 10 has a shaft 12 connected to a clutch 11 at one end. is constructed, and a roller 13 is installed at the center of this shaft 12.
is attached to this shaft 12, and furthermore, a feed unit 14 is provided and another roller 15 is provided, and a paper feed heald 1 is provided between this other roller 15 and the roller 13.
6 is stretched.

The feeding unit 14 is provided with a paper feed roller 17 which is movable in the vertical direction via a support plate 18 and which comes into contact with the uppermost sheet material. A rotation transmission belt 19 is stretched between the shaft 15a of the other roller 15 and the shaft 17a of the paper feed roller 17 so as to rotate in synchronization with the belt 16.

A front end guide plate 20 is provided on the machine stand 3 at the front end of the paper feed table 4 and is inclined forward in order to come into contact with the front end of the sheet-like object placed on the upper part of the paper feed table 4, In front of this front-end guide plate 20, intermittent rotation of a double-feed prevention roller 21 for intermittently rotating a double-feed prevention roller 21 that is in pressure contact from below with the paper feed belt 16 stretched between the rollers 13 and 15. A mechanism is provided.

A mechanism for intermittently rotating the double-feed prevention roller 21 is shown in FIG. 7, in which the center portion is supported by a shaft 24 on a standing plate 22 erected on the machine stand 3, and one end is connected to the paper feed stand. Another link plate 26 is connected to the other end of the link plate 23 pushed down by the front end of the link plate 23 via a shaft 25 . Ratchet push-up pawl 2
8 is provided, and the standing board 22 and the other link board 2 are provided.
A spring 29 is provided between the ratchet 27 and the ratchet 27, and a spring 29 is provided between the ratchet 27 and the ratchet 27. It is provided.

On the other hand, a pair of upper and lower guide plates 31a and 31b are provided in front between one of the rollers 13 on which the paper feed belt 16 is stretched and the double-feed prevention roller 21, and a pair of upper and lower guide plates 31a and 31b are provided between the two guide plates 31a and 31b. A pair of upper and lower guide rollers 32a and 32b are provided that protrude from the guide roller 32a.
, 32b has a pair of upper and lower guide plates 33a133b.
A pair of upper and lower restart rollers 34, a, 34
A paper refeeding section 35 consisting of a shaft 36 of the upper guide roller 32a and a shaft 37 of the upper restart roller 34a is provided.
The clutch 11 of the shaft 12 of one of the rollers 13 on which the paper feed belt 16 is stretched is connected via a gear train, and the gear provided on the shaft 37 of the upper restart roller 34a is When it is pushed into the main body 2a of a copying machine or the like, it is connected to the drive source of the main body.

The paper feed table 4 is located between the front end guide plate 20 located at the front end of the paper feed table 4 and the restart rollers 34a and 34b, and is located below the feed mechanism 10 in the machine stand 3. An actuating member 4 which is a driving source of a mechanism for moving to
0 is provided, a sprocket 41 provided on this operating member 40, a sprocket 42 provided on the upper part of one side plate 3a of the machine base 3, and a sprocket 42 located slightly behind this sprocket 42, and an image side plate 3a, The sprocket 44 attached to the shaft 43 passing through the side plate 3a is connected via a chain 745, and the sprocket 44 attached to the actuating member 40 is also connected to the sprocket 44 attached to the shaft 43 passing through the side plate 3a.
A sprocket 46 provided at a position corresponding to 1, a sprocket 47 provided at the top, and the shaft 4 passing through the sprocket 46
3 is connected to the sprocket 48 provided on the machine base through a chain 749, and a part of both chains 45 and 49 is between the paper feed base 4 and the support member 5, and is connected to the sprocket 48 provided on the machine base. It is located outside the side plate 3a of No. 3.

The support members 5.5 installed on both sides of the paper feed table 4 are as shown in FIG. 2 of the support members 5.5 are provided on this adjusting plate 50.5o.
A long hole 50a in the vertical direction corresponding to the two screw holes 5a is provided, and two holes 50 are provided at a position corresponding to the long hole 5b in the vertical direction of the support member 5 at a predetermined interval vertically.
b is drilled.

Then, by screwing the screw 51 into the screw hole 5a of the support member 5 through the elongated hole 50a of the adjustment plate 50, the adjustment plate 50
is movable and fixed in the vertical direction with respect to the support member 5, and the two holes 5 in the vertical direction of the adjustment plate 50
The bottle 52 inserted into the support member 5 passes through the elongated hole 5b in the vertical direction and can be locked to the checker 745.49, thereby connecting the checker 745.49 and both support members 5, that is, the paper feed table. 4, and both support members 5 have adjusting plates 50 on both sides thereof.
is located, so that the inclination of the paper feed table 4 in the left and right direction can be adjusted.

The relationship between the paper feed tray 4, the support member 5, and the checker 745.49 is as described above.
, 8b, and can move up and down, and these support rollers 8a, 8b are located slightly toward the rear end side of the central portion of the paper feed table 4 in the front-rear direction.
5.49 is connected to the longer side of the paper feed table 4 with respect to the support rollers 8a and 8b, that is, the side a in FIG.

On the other hand, a pinion 53 is provided on the lower surface of the paper feed tray 4, and a side guide plate on which racks 54 and 54 that mesh and engage with the pinion 53 are vertically provided through the holes 4a of the paper feed tray 4. 55. 55, so that they move closer to each other and move away from each other as the binion 53 rotates.A pulley 57 is connected to the handle 56 for external operation in order to rotate the binion 53. The two are connected via a wire 58.

This side guide plate 55 is designed as shown in FIG.
The shaft 7
One end of the spring 73 wound around 1 is fixed to the main body 70, and the other end is fixed to the rotary plate 72, so that the main body 70 and the rotary plate 72 are held in a continuous state. The rotary plate 72 can be rotated approximately 90 degrees against the biasing force of the spring 73, and at the time of this 90 degree rotation, the side guide plate 55 is larger than before the rotation.
The height of is reduced by a predetermined height C.

In addition, as shown in FIG.
At the lower end of a, there is a locking piece 60 for the machine base 2 of an electrophotographic copying machine, etc., whose front end is moved upward when the paper feed base 4 is lowered.
A tenth hook member 61 is provided to release the lock from the paper feed table 4, and the rear side thereof is U-shaped so as to extend to the rear of the paper feed tray 4, and when the center portion is pulled rearward, the tenth hook member 61 is provided. A 20th locking member 63 is provided which swings upward upon operation and whose front end is released from locking with the locking piece 62 of the machine base 2 of the electrophotographic copying apparatus.

Note that 65 is a case for covering the rear end of the automatic sheet feeder according to the present invention, and the upper part of this case can be opened, and a bundle of sheets can be inserted when the case is opened. It becomes.

Further, when the automatic sheet feeding device according to the present invention is attached to the main body 2a of an electrophotographic copying device, a manual feeding unit 75 can be attached to the side of the main body of the electrophotographic copying device. ing.

That is, this manual feed unit 75 has a box-like main body 76 whose top surface and front end are open, as shown in FIG.
Two grooves 77a, 77a whose front ends are inclined upward are formed in both side plates 77, 77 of this main body 76 so as to face each other, and inside this main body 76 there is a groove for placing a sheet-like object. Pins 79 and 79 provided at the top and bottom of the rear end of the plate 78 are held in the grooves 77a, 77a, and therefore the plate 78 for placing the sheet-like object is
Since the bottle 79 at the rear end is located in both the grooves 77a, 77a, it can be moved in and out from the front end of the main body 76 along the grooves 77a, 77a.

Next, the operation of the above will be explained.

First, when the paper feed tray 4 is in the lowered position shown in FIG. The engagement with the locking piece 60 of the machine base 2 of the copying machine or the like is released, and the link plate 23 of the mechanism that intermittently rotates the double-feed prevention roller 21 is pushed up by the paper feed base 4, thereby The ratchet push-up pawl 28 provided at the upper end of the other link plate 26 is in contact with the ratchet 27 on the side surface of the double-feed prevention roller 21 (see FIG. 7).

On the other hand, since the device according to the present invention is pushed into and attached to the main body of the electrophotographic copying device, the gear train consisting of gears and the like provided on the shaft 37 of the first restart roller 34a can be attached to the main body of the electrophotographic copying device. It is designed to be connected to a driving source.

When the paper feed tray 4 is in the lowered position, first, when the handle 56 for external operation is rotated, the binion 53 is rotated via the pulley 57 and the wire 58, and the rotation of the binion 53 causes the rack 54 to rotate. The side guide plates 55.55 move away from each other or approach each other via the . A predetermined number of sheet-like materials, such as transfer paper, are placed on the paper feed table 4, and then the actuating member 4 is activated by a command from the operating section of the main body of an electrophotographic copying machine or the like.
0, first, the sprocket 41 rotates, and this rotation passes through the checker 745 to the sprocket 42.
44, and the rotation of the sprocket 44 is transmitted to the shaft 4.
The rotation of sprocket 48 is transmitted to sprocket 48 through chain 749 and sprocket 47 .
46 will be rotated.

Therefore, when Che745.49 moves, this Che7
45 and 49 are integrated with the paper feed tray 4 via the pin 52 of the adjustment plate 50, so they will rise.

Moreover, during this upward movement, the paper feed tray 4 is moved between support rollers 8a and 8b provided in the vertical direction inside the support member 5 and inside the lift guide plate 9 provided on the outside of both side plates 3a of the machine table 3. Since the position is in the predetermined forward leaning state, Che745
．． It will rise together with 49.

At this time, the transfer paper placed on the top of the paper feed tray 4 is
The front end guide plate 20 is located at the front end of the paper feed tray 4 and is almost perpendicular to the top surface of the paper feed tray 4, so Each transfer paper is lifted with its front edge aligned,
There is no fear that the stacked transfer sheets will shift from each other during this upward movement. At this time, since the checks 745 and 49 are connected to the paper feed tray 4 on the side a in FIG. 2, the support rollers 8a and 8b does not impose a large load on the paper feed table 4 and can rise smoothly, and the topmost transfer paper comes into contact with the paper feed roller 17 and this is detected. The upper limit of the paper feed tray 4 is stopped by the detection by a member (not shown), that is, the actuating member 40
will be locked.

After that, the paper feed roller 17 starts rotating and sends out the uppermost transfer sheet, and the uppermost transfer sheet is fed in parallel with the paper feed bell 1-16 stretched between the rollers 13 and 15. Only the uppermost transfer sheet is reliably fed when passing between the prevention roller 21 and the pair of upper and lower guide plates 3.
1a and 31b, a pair of upper and lower guide rollers 32a,
32b, and then a pair of upper and lower guide plates 33a, 33.
b, and reaches between a pair of upper and lower restart rollers (registration rollers) 34a and 34b, and is put on standby.

Then, the pair of upper and lower restart rollers 34a, 34 is activated at a predetermined timing in response to a command from an electrophotographic copying device or the like.
b starts rotating and feeds the transfer paper.

When the number of transfer sheets on the feeding tray 4 decreases after the transfer sheets are fed sequentially from the topmost one as described above, the feeding roller 17
When the position of is lowered and a detection member (not shown) detects the lowering of the position, the actuating member 40 rotates and the sprocket 41 and the sprockets 42, 47, 44, 48, 46
The feed table 4 is raised by moving both chains 45 and 49 via the feed table 4, and when the feed table 4 rises by a predetermined amount (about 3 dragons), the rise of the feed roller 17 is detected and the raising of the feed table 4 is stopped. That is, the rotation of the actuating member 40 is stopped, and the transfer paper is sequentially fed out starting from the uppermost one in the same manner as described above.

When the transfer paper on the feeding table 4 runs out, the actuating member 40 is operated again by operating the operating section to lower the paper feeding table 4 to the initial state. When it is in the lowered position, the mechanism that intermittently rotates the double-feed prevention roller 21 by the front end of the feeding table 4 causes the link plate 23 to be pushed up, and the ratchet push-up pawl at the upper end of the other link plate 26 28 is raised and operated via the ratchet 27 to rotate the double feed prevention roller 21 by a predetermined angle, and at the same time, the tenth locking member 61 is held in an unlocked state and waits until the next command. .

Furthermore, when a paper feed cassette is provided below the zero body of an electrophotographic copying device, the paper feed tray 4 can be omitted by inserting transfer paper through a pair of guide plates 90a and 90b that open downward. Transfer paper restarts roller 34. a,
34b.

Furthermore, if the manual feed unit 75 is used, first, the paper feed table 4 is set to the lowered position, and then the manual feed unit 75 is brought down from the state 1 in FIG. 6 to the H state, and then the sheet-like object is placed If the plate 78 for placing a sheet-like object is pushed forward, the pin 79 at the rear end of the plate 78 for placing a sheet-like object will fit into the groove 77a27.
7a, and the front end rotates the rotary plate 72 at the upper part of both the guide plates 55 and 55 by approximately 90 degrees against the biasing force of the spring 73. The plate 78 moves forward without being stopped,
This plate 78 pushes up the feed roller 17 slightly and is positioned below the paper feed belt 16, so if the transfer paper is placed on the top of the plate 78 for placing a sheet-like object, it can be transferred manually. This transfer paper is then transferred to the restart roller 34. a, 3
After being stopped at 4a, it is fed at a predetermined timing.

Therefore, if a bundle of sheet-like materials is placed on the paper feed tray 4, the stack of sheets will be fed sequentially starting from the topmost one, and
If there is no need to use the paper feed unit, the lower paper feed unit can be used. Otherwise, the manual feed unit 1- installed in the main body 2a of an electrophotographic copying device etc. can be used. Since the paper base is integrated with the machine base, even if a paper jam or so-called jam occurs, the operability in handling the jam is greatly improved.

〔Effect of the invention〕

By configuring this invention as described above, the drive source for vertically moving the paper feed tray can be located between the paper feed tray and the paper refeed tray, so that the entire structure can be made compact. In addition, since the paper feed tray is tilted forward and moves forward in the feeding direction of the sheet-like objects as it goes upward, there is no fear that the stacked sheets will shift from each other, and the feeding operation is performed reliably. It has excellent effects such as being able to

[Brief explanation of drawings]

The drawings show an embodiment of the automatic sheet feeding device according to the present invention, in which FIG. 1 is a plan view, FIG. 2 is a longitudinal sectional front view particularly showing the relationship between the paper feed tray and the lock mechanism, and FIG. FIG. 4 is a longitudinal sectional front view particularly showing the relationship between the paper feed tray and the intermittent rotation mechanism of the double-feed prevention roller; FIG. fal (b
1 is a schematic diagram showing the support member and the adjustment member, FIG. 6 is a schematic diagram showing the relationship with the manual feed unit, FIG. 7 is a schematic diagram showing the intermittent rotation mechanism of the double-feed prevention roller, and FIG. 8 is a side guide. FIG. 3 is a schematic diagram showing the upper end of the plate. 1... Elevating paper feeding table 2... Machine stand 3, such as an electrophotographic copying machine, etc.
... Machine base 4 ... Paper feed table 5 ... Support members 8a, 8b ... Support rollers 9 ... Lift guide plate 10 ... ...Feeding section 13.15...Roller 16...Paper feed belt 17...Paper feed roller 20...Front end guide plate 21...・Double feed prevention rollers 23, 26... Link plate 27... Radiate 2nd day... Ratchet push-up plates 31a, 31b, 33a 33b 90a, 90b...・Guide plate 41.
42.44 46.47.48・Old・Sprocket 45.49・・
...Cheno 50 ...Adjustment plate 53 ... Binion 54 ... Rack 55 ... Side guide plate 56 ... Handle 60. 62... Locking piece 61... 10th hook member 63... 20th hook member 70... Main body 72 of side guide plate...
・Rotating plate 73...Spring 75...Manual feed unit 77a...Groove 78...Plate for placing sheet-like objects Fig. 7 Fig. 8

Claims (1)

[Claims] An automatic feeding device for sheet-like materials attached to the main body of a recording device, etc., which is moved up and down by a drive source, and
A paper feeding table which is in an inclined state with the rear side facing upward in the feeding direction of the sheet-like material and moves forward in the feeding direction of the sheet-like material as it rises in the inclined state; and a paper feeding table located above the paper feeding table. At the same time, there is a feed-out unit that feeds the sheets placed on the paper feed tray in order from the top, and a timing control for the recording device, etc. to feed the sheet-like objects sent out from this feed-out unit again. and a paper refeeding section that starts and stops in accordance with the paper refeeding section, and the driving source is disposed between the paper feeding table and the paper refeeding section. Device.