JPH06135578A - Automatic nonstop paper stacker for paper feeding - Google Patents

Abstract

PURPOSE:To provide an automatic nonstop paper stacker for paper feeding, capable of eliminating any malfunction in a separator due to the evulsion of spits. CONSTITUTION:This paper stacker is installed in a paper feeding part of a sheet printer equipped with a paper stacking block mounting a paper stacking plate loaded with paper and intermittently going up automatically with the paper feeding, and plural pieces of spits 78 being inserted into grooves on top of the paper stacking plate when the paper loaded on the paper stacking plate is reduced to the specified quantity and uplifting the paper and temporarily holding it when the paper stacking plate goes down together with the paper stacking block. In this constitution, the next paper loaded on the paper stacking plate being situated in a down position goes up together with the paper stacking block, and when it comes into contact with the upper paper via plural pieces of spits 78, these several spits 78 are pulled out in parts and the upper paper and the lower paper are made so as to be superposed on each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding unit of a sheet-fed printing press, without stopping the sheet feeding unit when the number of sheets of paper stacked on a stacking plate is reduced to a predetermined amount by sheet feeding. The present invention relates to a paper stacking device that automatically supplies paper stacked on a next paper stack plate.

[0002]

2. Description of the Related Art A conventional automatic non-stop sheet stacking device provided in a sheet feeding section of a conventional sheet-fed printing press will be described with reference to FIGS. A sheet feeding unit (feeder) 1 provided at the rear of a printing unit (not shown) of a sheet-fed printing press has a pair of left and right inverted L-shaped frames 2, which are erected on a floor surface. 2 supporting the rear end 2a of the upper horizontal part of the
b, a drive shaft 3 and a driven shaft 4 rotatably supported between the left and right frames 2, a drive sprocket 5 fixed to the drive shaft 3 and the driven shaft 4, and two front suspension sprockets 6 respectively. And 2 rear suspension sprockets 7 and 2
A rear suspension sprocket 8, a sprocket 6 and elevating chains 9 and 10 suspended on the sprockets 7 and 8, respectively, a paper stacking platform 11 having four corners suspended on the chains 9 and 10, and the paper stack A rectangular or rectangular paper stack plate 12 placed on a table 11 is provided.

On the upper surface of the stacking plate 12 on which the stacked sheets 13 are placed, a plurality of grooves 12a in the front-rear direction are arranged side by side as shown in FIG. Further, the drive sprocket 5 is driven by a motor 14 via a chain, and the forward / reverse rotation of the motor 14 causes the lifting chains 9 and 10 to move the paper stacking table 11 up and down. Next, as described above, the temporary paper receiving device 15 includes a drive shaft 16 and a driven shaft 17 which are rotatably supported between the left and right frames 2, and a drive sprocket 19 fixed to the drive shaft 16 and the driven shaft 17, respectively. Two front suspension sprockets 20, two rear suspension sprockets 21 and two rear suspension sprockets 22, sprockets 2
0 and sprocket 21 and 22, respectively, lifting chains 23 and 24, lifting bars 25 and 26 hung from the chains 23 and 24, and a motor 27 for driving the drive sprocket 19. The reverse rotation causes the lifting bars 25 and 26 to move up and down via the lifting chains 23 and 24.

Further, a separator 31 supported between the left and right frames 2 is provided with suctions 32, 33 and blow legs 34 so as to be movable up and down and / or back and forth. 1 sheet of paper is adsorbed by the suction 32 one by one, and is blown by the air from the blowing feet 34, and is fed to the printing unit by the suction 33. Stacked paper 1 accompanying this paper feed
A device (not shown) for detecting the height of the upper surface of the stacking paper 13 provided on the blower foot 34 when 3 is reduced by a predetermined amount.
At, the paper stacking platform 11 is automatically raised intermittently.

Next, the automatic sheet feeding non-stop device 41 is attached to a pair of left and right vertical frames 42 standing upright adjacent to each of the pair of left and right frames 2 on the column 2b side, and attached to the front and rear vertical surfaces of these frames 42. Pair of left and right horizontal frames 44 and skewer device 4 that move up and down along the guided guide 43
It consists of 5. In the pair of left and right vertical frames 42,
A drive sprocket 47 and two sprockets 48 fixed to a shaft 46 rotatably supported by these frames 42 and a shaft 49 fixed to each pair of left and right vertical frames 42 so as to be rotatable. Sprocket 50, chain 51 stretched between these sprockets 48 and 50, and drive sprocket 47
There is a motor 52 for rotating the motor, and the forward / reverse rotation of the motor 52 causes the lifting chain 51 to travel in the vertical direction.

The pins 51m and 51 of the lifting chain 51
A connecting bracket 52 having both ends attached to n is
As shown in FIG. 9, the saddle 53 that moves up and down along the guide 43 is fixed to a part of the pair of left and right horizontal frames 44, so that the saddle 53 and thus the pair of left and right horizontal frames 44 move up and down together with the lifting chain 51. On the other hand, in the pair of left and right horizontal frames 44, a drive gear 55 fixed to a shaft 54 rotatably supported by the frames 44 and two sprockets 56, and fixed to the pair of left and right horizontal frames 44, respectively. There is a sprocket 58 rotatably supported on a shaft 57 mounted on the shaft, a chain 59 stretched between the sprockets 56 and 58, and a motor 60 for rotating a drive gear 55.
When 0 is forward / reverse, the chain 59 runs in the horizontal direction back and forth.

Further, as shown in FIGS. 7 and 8, a rack 61 having both ends fixed to the front ends of a pair of left and right horizontal frames 44, and a roller 62 rolling on a guide surface 44n on the upper surface of each horizontal frame 44. A rack 64 having both ends fixed to a bearing 63 provided with, pinions 65 and 66 supported by a shaft 68 through a stroke ball bearing 67 meshing with the racks 61 and 64, and a pair of bevel gears 70 including a pinion 65. There is provided a motor 71 that is driven via the.
Therefore, the forward / reverse rotation of the motor 71 causes the pinions 65 and 6 to rotate.
6 moves in the left-right direction (direction orthogonal to the paper surface of FIG. 6) along racks 61 and 64, respectively.

Next, the racks 61 and 64 are slid in the skewer device 45 so as to be slidable, and the racks 72 and 64 are moved in the left-right direction along the racks, and the bearings 72 to which the skewer support plates 76 and 77 are fixedly mounted, respectively. And 73 and 74 and 75, and the skewer support plate 77 is provided with a plurality of (18 in the figure) skewers 78 having inclined surfaces in a side view at the tip thereof at appropriate intervals as shown in FIG. Has been. Further, the skewer device 45 has a connecting bracket 7 whose both ends are attached to a chain pin of a chain 59 like the above-described lifting chain.
9 (FIG. 10), the bracket 79 is fixed to the bearing 63. Therefore, the horizontal movement of the chain 59 causes the bearing 63, that is, the skewer support plate 77 and the skewer 78 to move in the front-back direction along with the bearings 74 and 75 along the shafts 68 and 69.

The continuous paper feeding of the paper feeding unit 1 is performed as follows. When the paper on the stacking plate 12 is reduced to a predetermined amount by the sheet feeding, the automatic sheet feeding non-stop stacking device 41 is lowered by the elevating chain 51 to the position shown in FIG. 1, and the groove of the stacking plate 12 of FIG. The skewer 78 is aligned vertically with respect to 12a, and then the skewers 78 are aligned with the racks 61 and 64 in the left-right direction.
2a, and the lifting bar 25 of the temporary paper receiving device 15 after insertion
Then, the skewer 78 is hoisted and temporarily held.

Next, the paper stacking board 11 is lowered to a predetermined position (position where the next paper stacking board can be placed), placed on a dolly or the like (not shown), and the next paper stacking board 12 on which paper is preliminarily stacked. To
At the truck, move to the paper loading platform 11, place it on the paper loading platform 11, raise it again, and the upper surface of the paper on the next paper loading plate 11 will be skewered 7.
When it contacts the lower surface of 8, the skewer 78 is pulled out by the chain 59. When the removal of the skewer 78 is completed and the upper and lower sheets of paper in contact with the skewer 78 are overlapped with each other, the automatic sheet feeding non-stop sheet stacking device 41 moves up and stands by for the next continuous sheet feeding. The elevating bars 25 and 26 are lowered below the position shown in FIG. 1 before the automatic sheet feeding non-stop sheet stacking device 41 is operated by the chains 23 and 24.

[0011]

The above-mentioned prior art has the following problems. (1) Since a plurality of skewers are pulled out all at once, the upper and lower papers that are in contact with the skewers are misaligned with the skewers and are wrinkled. The separator cannot normally suck the sheet of paper that has come close to the sheet, resulting in a paper feed failure or failure. Also, several sheets above and below the paper that contacts the skewer,
It shifts in the skewer pull-out direction and protrudes from the rear end of the stacked paper, and this protruding paper rises as the paper is fed, and pushes the bottom of the separator provided at the rear end of the upper surface of the stacked paper, brushes, presser springs, blowing feet, etc. The member may be pushed up and the feeder may stop. (2) In order to pull out these plural skewers at once, after these skewers have been pulled out, the upper surface of the paper temporarily held by the skewers rapidly descends by the thickness of the skewers. The upper surface of the paper is constantly detected.When the lower surface of the paper is detected due to the separator blow-off, etc., and when it is lower than the set value, a signal is generated and the stacking tray is automatically raised intermittently. The rise cannot be made in time depending on the sheet feeding speed, and the gap between the first and second suctions of the separator and the upper surface of the paper is widened, so that the suction and failure of the paper due to the first and second suctions occur.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems in the prior art and to provide an automatic paper feed non-stop paper stacking device which eliminates the malfunction of the separator due to the withdrawal of the skewers.

[0013]

[Means for Solving the Problems]

(1) When pulling out the skewer sandwiched between the paper temporarily held on the skewer and the paper stacked on the next stacking plate, one skewer or a small number of skewers are pulled out in several times. . For example, a few (2) skewers placed on both sides of a plurality of (6) skewers were removed halfway, and then a few (2) skewers placed in the center were removed halfway. Completely remove the skewers on both sides. (2) When pulling out the skewer sandwiched between the paper temporarily held on the skewer and the paper stacked on the next stacking plate, before pulling out the skewer from the paper edge, When the inclined surface reaches the rear end of the upper paper, the skewer is temporarily stopped or slowed down, and then the skewer is removed.

[0014]

[Action]

(1) It is prevented that the upper and lower papers of the skewer that are initially removed come into contact with each other and the upper and lower papers of the skewer that are subsequently removed do not shift together with the skewer. When pulling out one or a small number of skewers that are sequentially pulled out in several steps, the upper and lower papers that were in contact with the first pulled-out skewer part come into contact with the above-mentioned skewered part that is pulled out next time. Prevents misaligned paper. (2) At the temporary stop position or slow down position before the skewer is pulled out from the paper edge, the inclined surface at the tip of the skewer comes into contact with the rear end of the upper paper, and the upper surface of the paper at the rear end (the height of the separator is The small amount of decrease in the amount of the paper) is suppressed by a small amount, and the upper surface of the paper, which has fallen by the small amount, is detected by the blowing feet of the separator, and the paper stacking table is automatically intermittently raised. When the skewer is removed at the time of this rise, the top surface of the small amount of paper edge further descends, the blow foot again detects the top surface of this paper, and the paper stacking platform automatically and intermittently ascends again so that the top surface of the paper remains almost constant. It is kept and smooth feeding is performed even when removing skewers.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of an automatic sheet feeding non-stop sheet stacking device provided in a sheet feeding portion of a sheet-fed printing press, and FIGS. 2 and 3 are skewer support plates having a different shape from the skewer support plate shown in FIG. It is a side view of the vicinity. This automatic non-stop sheet feeding device 41 has basically the same structure as that of the conventional technique (FIGS. 6 to 12), except that the skewer device 4 is different.
5, a plurality of skewers (6 in FIG. 1 for the sake of simplicity) 78 (a, b, c, d, e, f)
Instead of the conventional skewer support putt 77, two skewer support plates 82 and 83 are provided.

Two skewers 78 (a, b, e, f) on both sides and two skewers 78 (c, d) at the center are attached to the skewer support plates 82 and 83, respectively. The rod end 85 of the air cylinder 84 fixed to the skewer support plate 82 is connected to the skewer support plate 83. When pulling out the skewers 78 (a, b, c, d, e, f), if the skewer support plate 82 of the skewer device 45 is moved to the first-stage skewering position Q shown in the drawing, the skewers 78 (a, b,
e, f) are pulled out halfway, and the upper and lower papers of this pulled-out portion E overlap. At this time, since air is not supplied to the air cylinder 84, the rod end 85 projects from the air cylinder 84 and is connected to the stationary skewer support plate 83.

Next, when air is supplied to the air cylinder 84 (on the rod side in FIG. 1), the skewer support plate 83 moves to the Q position with the skewers 78 (c, d) in the center, and merges with the skewer support plate 82. . At this point, the upper and lower sheets of the skewed portion 78 (c, d) on the pulled-out portion F overlap each other. Further, the combined skewer support plates 82 and 83 are simultaneously moved to the skewer removal completion position R by the chain 59, and the removal of the skewer device 45 is completed. A control device (not shown) controls the motor 60 that performs the stepwise driving of the chain 59 in the drawing process and the control of the air supply / discharge tine mig to the air cylinder 84 that is interlocked with the stepwise driving of the motor 60. The position P is the skewer start position.

2 and 3 show another form of the skewer support plate portion. Only one skewer support plate 82 is provided, and the skewer 78 (c, d) in the center is the skewer 78 (a, b) at both ends.
And e, f) longer than the seat plate 88 attached to the skewer end
A spring 87 is disposed between the skewer support plate 82 and the skewer support plate 82, and a spacing piece 86 is fixedly attached to the skewer 78 adjacent to the seat plate 88. The skewers 78 (c, d) are skewer support plates 8
2 is slidably fitted. Therefore, when the skewer support plate 82 moves from the P position to the Q position, the skewer 78
(A, b and e, f) move and also compress the spring 87 of the skewer 78 (c, d), hitting the spacing piece 86 and stopping the skewer 78.
(C, d) does not move. Then move the R position and skewer 7.
All 8 (a, b, c, d and e, f) are extracted from the paper.

A second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a block diagram of a skewer pull-out control of a sheet feeding automatic non-stop sheet stacking device provided in a sheet feeding section of a sheet-fed printing press, and FIG. 5 is a side view of a separator front-rear moving device. This automatic non-stop sheet feeding device 81 basically has the same structure as the conventional technique (FIGS. 6 to 12), except that the horizontal edges 78s are formed at the tips of the plurality of skewers 78. The skewer supporting plate 77 on which the skewers 78 are attached is formed without forming the skewer support plate 77 on which the skewers 78 are attached at the same time with the chain 59 from the rear end of the paper at the same time. The rear end of the temporarily held upper paper has an inclined surface 78t.
Is to pause or slow down at the position Q that touches.

To this end, a sensor 82 such as a potentiometer for detecting the position of the separator 31 and a control device 83 for controlling the amount of rotation of the motor 60 for moving the chain 59 in response to a signal from the sensor 82 are provided. This position Q is
Separator 31 that moves according to the size of the paper in the front-back direction
The controller 83 calculates the amount of pulling out the skewer 78 from the signal from the potentiometer 82 for detecting the position, and instructs and sets the rotation amount (total rotation number) to the motor 60. Therefore, regardless of the size of the paper in the front-back direction, at the position Q, the inclined surface 7
8t is always in contact with the lower rear edge of the temporarily held paper.

On the other hand, a device 91 for moving the separator 31 in the front-rear direction includes a support bar 92 and a support bar 92 which move upward and downward by arms 95 and 96 rotatably attached to fixed shafts 93 and 94. Screw shaft 97 supported at both ends, bracket 9 fixed to support bar 92
8 includes a bearing 99, a motor 100, and a potentiometer 82. The screw shaft 97 rotates from the motor 100 via a pair of bevel gears 101, and the screw shaft 9
The worm 102 of No. 7 rotates a potentiometer 82 having a worm wheel 103 on its input shaft, and the number of rotations determines the position of the separator 31.

Therefore, the skewer 7 is moved at the position of the separator 31 (the skewer start position P) which is moved according to the size of the paper in the front-rear direction.
When 8 is pulled out to the position Q, the rear end of the upper paper that has received the temporary paper comes into contact with the inclined surface 78t of the skewer 78 and descends by the amount s. Then, when it is pulled out to the skewer removal completion position R, it is lowered by an amount r in a stepwise manner. By setting the position Q by detecting the position of the separator for feeding the paper, when the rear end of the temporarily held upper paper comes into contact with the inclined surface of the skewer, the rear end of the upper surface of the paper is separated by the separator. The position of the upper surface of the paper can be accurately detected by making it coincide with the position of the blowing foot 34.

[0023]

【The invention's effect】

(1) An automatic non-stop sheet feeding device according to the present invention,
A paper stacking board on which paper is stacked is placed, and the paper stacking table is automatically intermittently raised as the paper is fed, and a groove on the top surface of the paper stacking board when the paper stacked on the paper stacking board has decreased to a predetermined amount. In the paper stacking device provided in the paper feed section of the sheet-fed printing press having a plurality of skewers for picking up and temporarily holding the paper when the paper stacking plate is lowered together with the paper stacking table, the paper stacking device is in a lowered position. When the next paper stacked on the paper stack rises together with the paper stack and comes into contact with the temporarily held upper paper via the plurality of skewers, the plurality of skewers are divided into a plurality of times. The following effects are obtained by the configuration in which the upper and lower papers are pulled out and overlapped with each other.

Conventionally, the paper misalignment that occurs when the skewer is pulled out does not occur due to the paper thickness and paper quality, or the paper misalignment is dispersed, and the paper misalignment can be minimized. Therefore, wrinkling due to paper misalignment and protrusion of misaligned paper from the trailing edge of stacked paper are eliminated, and defective paper feed and non-feeding can be prevented. (2) The automatic non-stop sheet feeding device according to the present invention is
A paper stacking board on which paper is stacked is placed, and the paper stacking table is automatically intermittently raised as the paper is fed, and a groove on the top surface of the paper stacking board when the paper stacked on the paper stacking board has decreased to a predetermined amount. In the paper stacking device provided in the paper feeding section of the sheet-fed printing press having a plurality of skewers that are inserted into the paper stacking board and hold the paper temporarily when the paper stacking board descends together with the paper stacking tray, the tip of each skewer An inclined surface having a horizontal edge is formed on the paper stack, and the next paper stacked on the paper stack in the descending position rises together with the paper stacking board to the temporarily held upper paper through the skewers. When contacting, when starting to pull out the skewers, and when the inclined surface of the skewers reaches the rear end of the temporarily held upper paper, the pulling out of the skewers is temporarily stopped or decelerated. , Has the following effects.

Since the lowering of the upper surface of the paper at the time of pulling out the skewers is suppressed to a small extent and the upper surface of the paper is kept constant by the automatic raising of the paper stacking table, there is no possibility of defective feeding or failure. Also, since the position to pause or slow down can be set according to the size of the paper in the vertical direction, the rear end of the temporarily held upper paper is
Regardless of the size of the paper in the top-bottom direction, this pause or slowdown position can always be set to lie on the skewed surface of the skewer.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of a first embodiment of the present invention.

FIG. 2 is a side view of a skewer support plate of a type different from that shown in FIG. 1 and its vicinity.

FIG. 3 is a side view of a short skewer adjacent to the skewer shown in FIG.

FIG. 4 is a skewer drawing control block diagram of a second embodiment of the present invention.

FIG. 5 is a side view of a separator front-rear moving device provided in a sheet feeding unit of the sheet-fed printing press.

FIG. 6 is a side view of a conventional sheet feeding automatic non-stop sheet stacking device.

FIG. 7 is an enlarged detailed view of a portion L in FIG.

FIG. 8 is an enlarged detailed view of an M portion in FIG.

9 is a sectional view taken along line NN of FIG.

10 is a plan view of the vicinity of the skewer device shown in FIG.

11 is an enlarged view of a V portion of FIG.

12 is a side view of the paper stack shown in FIG.

[Explanation of symbols]

 41 Automatic non-stop paper feeder 78a, b, e, f Skewers on both sides 78c, d Skewers in the center 82,83 Skewer support plate P Skewer start position Q First stage skewer removal position R Skewer removal completion position

Claims (2)

[Claims] 1. A paper stacking board on which papers are stacked is placed, and a paper stacking table that rises automatically and intermittently as the paper is fed, and a paper stacking board when the papers stacked on the paper stacking board decrease to a predetermined amount. In a paper stacking device provided in a paper feeding section of a sheet-fed printing press, which is inserted into a groove on an upper surface of a stacking plate and has a plurality of skewers for picking up and temporarily holding the paper when the paper stacking plate descends together with the paper stacking table. , The plurality of skewers when the next sheet stacked on the stacking plate in the descending position rises together with the sheet stacking board and comes into contact with the temporarily held upper sheet through the plurality of skewers. An automatic paper feed non-stop paper stacking device, characterized in that the upper paper and the lower paper are superposed on each other in a plurality of times. 2. A paper stacking board on which papers are stacked is placed, and a paper stacking table that automatically and intermittently rises as the paper is fed, and the papers stacked on the paper stacking board when the papers are reduced to a predetermined amount. In a paper stacking device provided in a paper feeding section of a sheet-fed printing press, which is inserted into a groove on an upper surface of a stacking plate and has a plurality of skewers for picking up and temporarily holding the paper when the paper stacking plate descends together with the paper stacking table. , Forming an inclined surface having a horizontal edge at the tip of each skewer, the next paper loaded on the paper stack in the descending position rises together with the paper stack to the temporarily held upper paper. When contacting via the skewer, pulling out the skewer is started, and when the inclined surface of the skewer reaches the rear end of the temporarily held upper paper, the pulling out of the skewer is temporarily stopped or decelerated. The automatic non-stop paper stacking device, which is characterized in that