JP2984482B2 - Automatic non-stop paper feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding section of a sheet-fed printing press, which stops a sheet feeding section without stopping when a sheet loaded on a paper stacking board is reduced to a predetermined amount by sheet feeding. The present invention relates to a paper stacking apparatus that automatically supplies paper loaded on a next paper stacking board.

[0002]

2. Description of the Related Art A conventional automatic paper feed non-stop stacking apparatus provided in a paper feed unit of a sheet-fed printing press will be described with reference to FIGS. A sheet feeding unit (feeder) 1 provided behind a printing unit (not shown) of the sheet-fed printing press includes a pair of right and left inverted L-shaped frames 2 erected on the floor surface. 2 supporting the rear end 2a of the upper horizontal portion
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 2 rear suspension sprockets 7 and 2
The rear suspension sprocket 8, the elevating chains 9 and 10 suspended on the sprocket 6 and the sprockets 7 and 8, respectively, the paper stack 11 whose four corners are suspended on the chains 9 and 10, and the paper stack A square or rectangular paper stack 12 placed on a table 11 is provided.

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

[0004] Further, on the separator 31 supported between the left and right frames 2, one suction 32, two suction 33 and a blowing foot 34 are attached so as to be able to move up and down and / or back and forth. Are sucked one by one by the suction 32, are separated by the air from the blowing foot 34, and are fed toward the printing unit by the suction 33. Loading paper 1
3 is a device (not shown) for detecting the height of the upper surface of the stacking paper 13 provided on the blowing foot 34 when the amount is reduced by a predetermined slight amount.
, The paper stack 11 is automatically raised intermittently.

Next, an automatic non-stop paper feeder 41 is mounted on a pair of left and right vertical frames 42 erected adjacent to the pair of left and right frames 2 on the side of the column 2b, and mounted on front and rear vertical surfaces of these frames 42. Pair of left and right horizontal frames 44 that move up and down along the guided guide 43 and the skewer device 4
It consists of five. In the pair of left and right vertical frames 42,
A drive sprocket 47 and two sprockets 48 fixedly mounted on a shaft 46 rotatably supported by these frames 42, and a rotatable support on shafts 49 fixedly mounted on a pair of left and right vertical frames 42. Sprocket 50, a chain 51 stretched between the sprockets 48 and 50, and a driving sprocket 47
The motor 52 rotates the elevating chain 51 in the vertical direction by the forward / reverse rotation of the motor 52.

The pins 51m and 51 of the lifting chain 51
n, and a connection bracket 52 having both ends attached thereto.
As shown in FIG. 9, the pair of left and right horizontal frames 44 are fixed to the saddle 53 that moves up and down along the guide 43 at a part of the pair of left and right horizontal frames 44.
It moves up and down together with the chain 51. On the other hand, a pair of left and right horizontal frames 44 has driving gears 55 and 2 fixedly mounted on a shaft 54 rotatably supported by these frames 44.
Sprocket 56, a pair of left and right horizontal frames 44
Sprockets 58 rotatably supported on shafts 57 respectively fixed to the sprockets, and these sprockets 56 and 58
And a motor 60 for rotating the drive gear 55. The motor 60 rotates the chain 59 forward and backward in the horizontal direction by forward and reverse rotation.

As shown in FIGS. 7 and 8, a pair of left and right horizontal frames 44 is provided with a rack 61 having both ends fixed to the front ends, and rollers 62 for rolling on guide surfaces 44n on the upper surfaces of the horizontal frames 44. A rack 64 fixed at both ends to a bearing 63 provided with pinions 65 and 66 meshed with the racks 61 and 64 and supported on a shaft 68 via a stroke ball bearing 67, and a pinion 65 , A motor 71 is provided for driving the motor.
Therefore, the forward and reverse rotation of the motor 71 causes the pinions 65 and 6 to rotate.
6 moves in the left-right direction (the direction perpendicular to the plane of FIG. 6) along the racks 61 and 64, respectively.

Next, the skewer device 45 sandwiches the racks 61 and 64 so as to be slidable, moves left and right along the racks, and has bearings 72 on which skewer support plates 76 and 77 are fixed. And 73, and 74 and 75, and the skewer support plate 77 is provided with a plurality of (18 in the figure) skewers 78 each having an inclined surface at the tip thereof at a suitable interval as shown in FIG. Have been. Further, the skewer device 45 includes a connection bracket 7 having both ends attached to a chain pin of a chain 59 similarly to the above-described lifting chain.
9 (FIG. 10), and the bracket 79 is fixed to the bearing 63. Therefore, the horizontal movement of the chain 59 causes the bearing 63 and thus the skewer support plate 77 and the skewer 78 to move in the front-rear direction along the shafts 68 and 69 together with the bearings 74 and 75.

The continuous paper feeding of the paper feeding unit 1 is performed as follows. When the paper on the pile board 12 by the sheet feeding is reduced to a predetermined amount, and down to the paper feed automatic nonstop Kamiseki device 41 illustrated in FIG. 6 by the lifting chains 51 position, the grooves of the pile board 12 of FIG. 12 12a, the vertical position of the skewer 78 is aligned, and then the racks 61 and 64 align the horizontal position of the skewer 78.
2a, and after insertion, the elevating bar 25 of the temporary paper receiving device 15
To lift and temporarily hold the skewer 78.

Next, the sheet stack 11 is lowered to a predetermined position (a position where the next sheet stack can be placed), and the next sheet stack 12 loaded on a trolley (not shown) and loaded with paper in advance. To
The trolley moves to the paper stack 11, puts it on the paper stack 11, and raises it again.
When the lower surface 8 comes into contact with the lower surface, the skewer 78 is pulled out by the chain 59. When the pulling of the skewer 78 is completed and the upper and lower sheets in contact with the skewer 78 overlap, the automatic non-stop paper stacking device 41 rises and stands by for the next continuous paper feeding. The lifting bars 25 and 26 are lowered below the positions shown in FIG. 6 before the automatic paper feed non-stop 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 at once, the lower paper is in contact with the skewers, and the lower paper is displaced together with the skewers and becomes wrinkled. The separator cannot normally suck the deviated paper, and defective paper feeding and failure occur. Also, several upper and lower sheets near the paper that comes into contact with the skewer,
It shifts in the skewer pull-out direction, protrudes from the rear end of the stacking paper, and this protruding paper rises as the paper is fed. The feeder may stop when the member is pushed up. (2) After the plurality of skewers are pulled out at once, after the skewers have been pulled out, the upper surface of the paper temporarily held by the skewer rapidly drops by the thickness of the skewer. This lower surface of the paper is detected by the blowing of the separator, which constantly detects the upper surface of the paper.If the lower surface of the paper is lower than the set value, a signal is issued to automatically intermittently raise the paper stack. The rise is not sufficient depending on the paper feeding speed, and the gap between the separators 1 and 2 and the upper surface of the paper is greatly increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic non-stop sheet feeding apparatus which solves the above-mentioned problems in the prior art and eliminates a malfunction of a separator caused by pulling out a skewer.

[0013]

[Means for Solving the Problems ] To solve the above-mentioned problems.
Therefore, the present invention employs the following means. Claim 1
Paper feed automatic non-stop paper stacker, paper loaded
A paper platform on which a paper platform is placed and which automatically rises intermittently as paper is fed
And when the amount of paper placed on the paper stack has decreased to a predetermined amount.
Into the groove on the top of the stacking board, and the stacking board is
With multiple skewers that lift and temporarily hold paper when descending together
Paper stacker provided in the paper feeding section of a sheet-fed printing press equipped with
And make the tip of each skewer an inclined surface with respect to the horizontal.
The next paper loaded on a paper stack rises with the stack
Through the plurality of skewers on the temporarily held upper paper.
The skewers are divided into multiple groups
With a time lag and sequentially withdrawing step by step,
The inclined surface of the skewer reaches the rear end of the temporarily held upper paper
Is configured to temporarily stop pulling out the skewer when
It is characterized by having done. In this case, the plurality
When pulling out the skewers from the beginning of the skewer to the skewer completion position
It is preferable to provide a plurality of temporary stop positions between the two.

[0014]

[Function] (1) The skewer is divided into a plurality of groups,
Since the sheets are sequentially pulled out with a gap therebetween, the upper and lower portions of the skewers that are initially removed come into contact with each other, and the upper and lower portions of the skewers to be subsequently removed are prevented from shifting together with the skewer. Pull out sequentially
When the group of skewers to be pulled out is divided into several stages and pulled out, the upper and lower papers that were in contact with the skewer part that was pulled out the first time come in contact and the paper that is in contact with the skewer part that is pulled out next time prevent. (2) At the temporary stop position before the skewer is removed from the paper end, the inclined surface of the leading end of the skewer contacts the rear end of the upper paper, and the upper surface of the paper at the rear end (the part where the separator detects the height) ) Is suppressed to a small amount, and the upper surface of the paper which has been reduced by this small amount is detected by the blowing foot of the separator, and the paper stacker automatically intermittently rises. When the skewer is removed at the time of this rise, the top surface of the small amount of paper is further lowered, the blowing foot detects the upper surface of the lowered paper again, and the paper stacker is automatically intermittently raised again, and the upper surface of the paper is almost constant. It is maintained and smooth paper feeding is performed even when removing the skewers.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.
Will be explained. FIG. 1 is a plan view of a paper feed automatic non-stop stacking device provided in a paper feed unit of a sheet-fed printing press. FIGS. 2 and 3 show a skewer support plate having a shape different from that of the skewer support plate shown in FIG. It is a side view of the vicinity. This automatic paper feed non-stop stacking device 41 has basically the same structure as that of the related art (FIGS. 6 to 12), except for a plurality of skewers of the skewer device 45 (simplification of description). Therefore, two skewer support plates 82 and 83 are provided at the rear end of 78 (a, b, c, d, e, f) instead of the conventional skewer support plate 77. It is being done.

Each of the skewer support plates 82 and 83 has two skewers 78 (a, b, e, f) on both sides and two central skewers 78 (c, d). The rod end 85 of the air cylinder 84 fixed to the skewer support plate 82 is connected to the skewer support plate 83. That is, the skewer 78 is
A group of four attached skewers 78 (a, b, e, f)
And two skewers 78 attached to the skewer support plate 83
(C, d). And skewer 78
When extracting (a, b, c, d, e, f), in the first stage
Remove the first stage skewer of the skewer support plate 82 of the skewer device 45
When it is moved to the position Q (see FIG. 3), the skewers 78 (a, b, e, f) on both sides, which are one group, are pulled out halfway,
The paper below and above the drawn portion E overlaps. At this time, since air is not supplied to the air cylinder 84, the rod end 85 is connected to the stationary skewer support plate 83 which protrudes from the air cylinder 84.

Next, when air is supplied to the air cylinder 84 (the rod side in FIG. 1), the skewer support plate 83
It moves to the Q position with the central skewer 78 (c, d), which is the other group, and merges with the skewer support plate 82. At this point, the upper and lower papers on the pulled-out portion F of the skewer 78 (c, d) overlap. Further, the combined skewer support plates 82 and 83
At the same time, the chain 59 is moved to the skewer pulling completion position R, and the pulling out of the skewer device 45 is completed. Like this, it
In the process of sequentially pulling out gradually with a time difference between each
The control of the motor 60 that drives the chain 59 in a stepwise manner and the control of the tine mig for supplying and discharging air to and from the air cylinder 84 in conjunction with the stepwise drive of the motor 60 are performed by a control device (not shown). Note that the position P is a position for starting the skewer removal.

The tip of each skewer 78 described above is
As shown in the figure, an inclined surface having a horizontal edge 78s
78t, on which the skewers 78 are mounted
The support plate 77 is simultaneously held by the chain 59 from the rear end of the paper.
Pull out the skewer 78 without pulling it out at once
In the final stage, the trailing edge of the temporarily
At the position (hereinafter referred to as a pause position) Q1 in contact with the inclined surface 78t
Pause.

Therefore, the skewer 78 is completely moved from the temporary stop position Q1.
At the final stage of skewer pulling to the skewering position R
Is the rear end of the upper paper that has been temporarily received
8t, and falls by the surface reduction amount s due to the inclination. About
In the pull pull up comb removal completion position R, the edge 78s
It descends by the amount (height dimension) r to the lower paper surface. this
Time, the setting of the pause position Q1 is performed by the separator 3 for feeding the paper.
1 by detecting the position of
When the rear end of the held paper touches the inclined surface 78t of the skewer
The rear end of the upper surface of the paper is the position of the blowing foot 34 of the separator.
And the detection of the top surface position of the paper is accurate.
It can be carried out.

FIGS. 4 and 5 show other forms of the skewer support plate portion.
Here is the formula. In this embodiment, one skewer support plate 8
2 are provided, and the central skewer 78 (c, d)
It is longer than the end skewer 78 (a, b and e, f).
A spring is provided between the attached seat plate 88 and the skewer support plate 82.
87 are arranged, and the spacing piece 86 is adjacent to the
8 and is fixedly attached. Skewer 78 (c, d) is a skewer
It is slidably fitted into the support plate 82. Yo
Then, the skewer support plate 82 moves from the P position to the Q position.
Then, the skewer 78 (a, b and e, f) moves, and the skewer 78
Compress the spring 87 of (c, d) and stop it against the spacing piece 86
The marikushi 78 (c, d) does not move. Then move to R position
When moving, all the skewers 78 (a, b, c, d and e, f)
Removed from paper. Also in this case, the last time the skewer 78 is pulled out
At the stage, the trailing edge of the temporarily held paper is inclined
It is good to pause at the pause position in contact with 78t.

[0021]

According to the present invention, the automatic non-stop paper stack according to the present invention is provided.
The device places a paper stack on which paper is loaded, and with paper feeding,
Automatic intermittently rising paper stack, and placed on the paper stack
When the paper is reduced to the specified amount, it is
Lifts the paper when the stacking board descends with the stacking platform
Paper feed unit of sheet-fed printing press equipped with multiple skewers to hold temporarily
In the paper stacking device installed in
To form the next inclined surface, and the next
The paper rises with the stacking platform and the temporarily held
When the paper is in contact with the paper through the plurality of skewers,
Divided into groups of numbers, each with a time lag, step by step
The skewer is temporarily pulled out.
When the paper reaches the trailing edge of
Has the following effects.

The skewers are divided into a plurality of groups, and
Can be pulled out step by step
In the past, it occurred when pulling out a skewer depending on the paper thickness and paper quality.
No misalignment occurs, or this misalignment is dispersed
Deviation can be minimized. Therefore, paper misalignment
No wrinkles or misaligned paper protruding from the trailing edge
Therefore, it is possible to prevent defective paper feeding and paper feeding failure.

Further, the lowering of the upper surface of the paper when pulling out the skewer is prevented.
Keeping the paper top surface constant by automatically raising the
Therefore, no paper feeding failure or inability occurs. Also, the paper sky region
The pause position can be set according to the orientation size.
When the rear edge of the upper paper held is the paper's vertical size
Regardless of the position of the skewers,
Can be set to exist.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an automatic non-storage paper feeder according to an embodiment of the present invention .
It is a top view which shows the principal part of a paper wrapping apparatus.

FIG. 2 is an explanatory side view showing stepwise positions of the skewers;
It is.

FIG. 3 shows each skewer at a first stage skewer removal position Q in FIG . 1;
FIG.

FIG. 4 shows a skewer support press of a type different from that shown in FIG .
FIG. 2 is a side view of the seat and its vicinity.

FIG. 5 shows the side of the short skewer adjacent to the skewer shown in FIG .
FIG.

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

FIG. 7 is an enlarged detail view of a portion L in FIG. 6;

FIG. 8 is an enlarged detailed view of a portion M in FIG. 6;

FIG. 9 is a sectional view taken along line NN of FIG. 6;

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

FIG. 11 is an enlarged view of a portion V in FIG. 10;

FIG. 12 is a side view of the paper stacking board shown in FIG. 6;

[Explanation of symbols]

41 Automatic paper feed non-stop stacking device 78a, b, e, f Side skewers 78c, d Center skewers 82, 83 Skewing support plate P Skewing start position Q First stage skewing position Q1 Temporary stop position R Skewing Completion position

Claims (2)

(57) [Claims] A sheet stacker on which a sheet of paper is stacked, the sheet stack automatically intermittently rises as the sheet is fed, and a sheet stack placed on the sheet stack is reduced to a predetermined amount. A paper stacking device provided in a paper feed unit of a sheet-fed printing press, the paper stacking unit having a plurality of skewers inserted into grooves on the upper surface of the paper stacking board and lifting and temporarily holding paper when the paper stacking board moves down with the paper stacking board. , The tip of each skewer is inclined with respect to the horizontal, and the paper
The next paper loaded on the stacking board rises with the
The temporarily held upper paper is connected via the plurality of skewers.
The skewer is divided into a plurality of groups
Pull out step by step with a difference and tilt the skewers.
When the slope reaches the trailing edge of the temporarily held upper paper
A non-stop paper feeding automatic sheet feeding device , wherein the pulling out of the skewers is temporarily stopped . 2. When the plurality of skewers are pulled out, the pulling out starts.
Multiple pause positions between
2. The automatic non-stop paper feeding device according to claim 1, further comprising: