JP2003146479A - Paper presser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust a paper pressing plate, in a paper presser guiding the front end of a sheet sequentially sent out of a sheet supply device and restricting the floating of the sheet. SOLUTION: In this paper presser, one end of a support member 14 is installed to a stationary member 11a provided such that a position of the stationary member 11a is fixed relatively to a sheet travel face 2a. The support member 14 supports the paper pressing plate 6 disposed near and nearly parallel to the sheet travel face 2a in a position apart from the installation part. The stationary member 11a and the support member 14 are connected by an adjustment screw 18 in a position apart from the installation part, and are contacted or separated according to a rotation amount of the adjustment screw 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper pressing device that guides the front end of a sheet sequentially fed from a sheet feeding device and regulates the floating of the sheet.

[0002]

2. Description of the Related Art A conventional sheet-fed printing press has, as shown in FIG. 6, a sheet feeding device 1, a feeder 2, a printing section 30 and a sheet discharging device (not shown) as main components. In such a sheet-fed printing press, the sheets 3 stacked on the paper feed table 31 are taken out one by one from the topmost table of the table in correspondence with the consumption speed accompanying printing, and sent to the feeder 2. Then, the sheet 3 is transferred to the downstream side by the rotation of the sheet conveying belt 32 of the feeder 2 and is introduced into the printing unit 30 via the first intermediate cylinder 5. When the sheet 3 is transferred on the feeder board of the feeder 2, the suction box 45 provided inside the sheet conveying belt 32 sucks the sheet 3 from the belt 32 side and holds the sheet 3 on the belt 32. (Fig. 7
reference).

Since the printing section 30 performs color printing using inks such as black, indigo, red, yellow, and other special colors, a plurality of printing devices 30a to 30c are arranged in parallel for each color of ink. The seat 3 includes the first intermediate cylinder 5 to the impression cylinder 38a.
After being transferred to the printer and printed with a predetermined ink, the intermediate cylinder 39 transfers the ink to the downstream printing machines 30b and 30c.

After printing of each color, the sheets 3 are conveyed by the sheet conveying section of the sheet discharging device and stacked on the sheet discharging table of the sheet stacking device provided below the sheet conveying device. It Then, when the sheets 3 are stacked by a predetermined amount (number of sheets), they are carried out as a bundle to the outside. By the way, downstream of the feeder board 2a,
As shown in FIG. 9, a horizontal needle device 36 having two horizontal needles arranged at intervals of the sheet width is provided, and a front pad 4 is further provided at the tip of the feeder board 2a. . Therefore, when the seat 3 travels between the two lateral needles, the seat travel position and the travel direction angle are corrected, and the seat 3 is inserted straight into the gap S between the bent portion of the front pad 4 and the feeder board 2a. . Then, the seat 3 comes into contact with the front pad 4 and stops for a moment, and the posture is adjusted so that the front end of the sheet becomes parallel to the front pad 4.

When the posture of the seat 3 is adjusted, the front pad 4 swings and retreats around the pin 4a as the center of rotation, and the front end of the seat is gripped by the pawl 40 and the pawl seat 41 of the sheet delivery device 37. Then, as shown in FIG.
3 swings and retreats around the fulcrum shaft 22 as the center of rotation,
The sheet 3 is transferred downstream and is delivered to the pawl device 42 of the first intermediate body 5 that rotates in synchronization with the sheet delivery device 37.
The swing arm 23 moves the seat 3 into the first intermediate body 5
After the transfer, the sheet is once moved to the alternate long and short dash line position (operating position), returned to the solid line position (standby position) again, and waits to grip the succeeding sheet 3.

As described above, it is extremely important to arrange the posture of the seat 3 from the viewpoint of preventing a grip mistake when the seat delivery device 37 delivers the seat 3. That is, when the sheet 3 is delivered, the position of the front end of the sheet shifts back and forth, the sheet 3 skews, or corrugates in the width direction, so that a gripping error occurs and a sheet feeding failure or a registration error occurs. Further, the delivery in the subsequent process may not be stable and may fail.

However, the sheet 3 used for printing is not always smooth, and for example, the sheet end (holding side) in the running direction is corrugated, warped or curled at the end. There is something. In order to prevent the sheet 3 from escaping upward without entering the gap S formed by the front pad 4 and the feeder board 2a due to such deformation in the sheet thickness direction, the gap S should be set to be large. However, due to the structure in which the front pad 4 swings back, the gap S cannot be made too large,
It is not possible to expect great restraint force against the seat 3 escaping upward. Therefore, the feeder board 2a
A paper pressing device 35 as shown in FIG. 9 is provided at a position close to the downstream end of the sheet, and such deformation is corrected by pressing force from above the sheet.

The paper pressing device 35 corrects the deformation by pressing the sheet 3 from above with a flat plate located above the traveling path of the sheet 3, and as shown in FIG. It comprises a bracket 11 and the like for supporting the pressing plate 6. The bracket 11 is attached to the round rod-shaped shaft 8 spanned between the frames 50, 50 (only one side is shown in the figure) on both sides of the sheet traveling path of the feeder 2 by the block 10.

Then, the paper pressing amount (that is, the paper pressing plate 6
A plurality of sets of the paper pressing device 35 are provided along the shaft 8 so that the size of the gap between the sheet conveying belt 32 and the sheet conveying belt 32 becomes uniform in the sheet width direction. The structure allows the assembly angle to be adjusted arbitrarily. This adjustment of the paper pressing amount is an important element for the sheet 3 to travel smoothly while correcting the deformation. In other words, if the paper pressing plate 6 is weakly pressed, the bending and waviness of the front edge of the sheet when the sheet 3 hits the front pad 4 cannot be corrected, and as a result, the nail 4
0 cannot hold the sheet 3 flat, and doubling or wrinkling occurs. Further, if the pressure of the paper pressing plate 6 is too strong, the flow of the sheet 3 on the feeder board 2a is deteriorated, the sheet 3 cannot reach the front pad 4, and when the sheet 3 passes under the paper pressing plate 6. It causes scratches on the skin.

Conventionally, such adjustment has been performed by an operator tapping the block 10 with a hammer.

[0011]

However, in such an adjusting method, since the positions of the block 10 and the paper pressing plate 6 are apart from each other, the setting thereof is very delicate and difficult.
Long adjustment time and high skill are required. Further, due to time constraints, adjustment of the paper pressing plate 6 when changing the sheet thickness becomes insufficient, and adjustments for suppressing variations among a plurality of paper pressing plates 6 cannot be frequently made. As a result, a large amount of various types of waste paper may be generated.

The present invention was devised in view of the above-mentioned problems, and an object of the present invention is to provide a paper pressing device capable of easily adjusting the paper pressing plate.

[0013]

In order to achieve the above-mentioned object, a paper pressing device of the present invention is a paper pressing device located at the most downstream part of a feeder of a sheet-fed printing press, with respect to a sheet traveling surface. A paper pressing plate arranged substantially parallel and close to each other,
A stationary member fixed in position with respect to the sheet traveling surface, a support member having one end attached to the stationary member and supporting the paper pressing plate at a position apart from the mounting portion, and the mounting portion. It is characterized in that the stationary member and the support member are connected to each other at a position distant from, and an adjusting screw for bringing the stationary member and the support member into contact with or separated from each other according to the amount of rotation is provided.

As a result, the supporting member swings toward and away from the sheet traveling surface with the mounting portion as the center of rotation, and a predetermined gap is formed between the sheet pressing plate mounted on the supporting member and the sheet traveling surface. To be done. Then, the swing amount of the support member with the position of the stationary member as the reference position is adjusted by the adjusting screw, whereby the size of the gap is adjusted (claim 1).

At this time, the support member may be attached to the stationary member via a pin at the attachment portion, and a spring may be interposed between the stationary member and the support member. As a result, the support member swings toward and away from the seat running surface with the pin as the center of rotation, and the swing amount is adjusted by the adjusting screw. Then, in the adjustment position, the position of the support member is fixed while being biased in the restoring direction by the restoring force of the spring (claim 2).

Alternatively, the supporting member may be formed of an elastic body and integrally joined to the stationary member at the mounting portion. In this case, when the adjusting screw is rotated, the supporting member is elastically deformed in the direction of approaching and separating from the seat running surface, and the amount of this deformation is adjusted by the adjusting screw. Further, at the adjustment position, the position of the support member is fixed while being biased in the restoring direction by the restoring force generated by the elastic deformation (claim 3).

A roller may be rotatably attached to the tip of the paper pressing plate. In this case, the roller rotates while contacting the sheet traveling on the sheet traveling surface (claim 4). At this time, it is preferable that the outer peripheral surface of the roller is made of an elastic body.

A motor for rotating the adjusting screw and a control means for controlling the rotation amount of the motor may be further provided. As a result, the adjusting screw is rotationally driven by the motor controlled by the control means (claim 6). At this time, it further comprises a rotation speed detecting means for detecting the rotation speed of the adjusting screw, and the control means inputs the target rotation speed of the adjusting screw,
The rotation amount of the motor may be controlled so that the rotation speed of the adjusting screw becomes the target rotation speed based on the detection result from the rotation speed detection means. As a result, the detection result of the rotation speed detection means is fed back to the control means, and the motor is drive-controlled so that the rotation speed of the adjusting screw becomes the target rotation speed (claim 7).

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment will be described. FIGS. 1 to 4 show a paper pressing device according to a first embodiment of the present invention. FIG. 1 is a side sectional view showing the entire structure, and FIG. 2 is a plan view thereof. FIG. 3 and FIG. 3 are enlarged views showing the main part of the adjusting device. Further, FIG. 4 is a side view showing a modified example of the paper pressing device of the present embodiment, and is a view corresponding to FIG. 1.

The same parts as those of the conventional technique described with reference to FIGS. 6 to 9 are designated by the same reference numerals, and the description thereof will be partially omitted. Paper pressing device 44 in the present embodiment
As shown in FIG. 2, is to regulate the deformation of the sheet traveling in the gap between the sheet traveling surface of the feeder board and the paper pressing plate 6, as in the conventional one. In order to make the width uniform in the width direction, a plurality of feeder boards are provided in the width direction so that the size of the gap can be adjusted independently.

As shown in FIG. 1, each paper pressing device 44 includes a paper pressing plate 6 and an L to which the paper pressing plate 6 is attached.
A support bracket (supporting member) 14 in the shape of a letter, a bracket (stationary member) 11 that supports the support bracket 14 from above, and a bracket that spans the bracket 11 between the frames 50 on both sides of the traveling path of the feeder board 2a. The block 10 is attached to the rod-shaped shaft 8 and the like.

The paper pressing plate 6 is formed by bending a flat plate into a substantially L shape, and one end surface of the paper pressing plate 6 is substantially parallel to the sheet traveling surface of the feeder board 2a while forming a predetermined gap. While being arranged, the other end surface is attached to the L-shaped support fitting 14. In addition, the bent portion of the paper pressing plate 6 has a structure that is bent in two steps so that the sheet 3 is introduced into the gap even if the front end of the sheet is slightly deformed.

The support fitting 14 is an L-shaped plate, and the paper pressing plate 6 is attached to one end thereof, and the other end thereof is shown in FIG.
As shown in (b), it is attached to the bracket 11 by the bearing 12 and the pin 13 so that it can swing about the pin 13 as a center of rotation with respect to the feeder board 2a. The bracket 11 has a structure in which a bracket 11a formed of a plate and a bracket 11b formed of a round bar are connected. The round bar-shaped bracket 11b is inserted into the block 10 and fixed by the set screw 15. At this time, the round rod-shaped bracket 11b is arranged so that the plate surface of the plate-shaped bracket 11a is substantially parallel to the seat traveling surface.
The mounting angle of the block to the block 10 is adjusted and fixed. The washer 16 and the split pin 17 prevent the block 10 from falling off.

The plate surface at the tip of the plate-like blanket 11a and the plate surface near the bent portion of the support fitting 14 are connected by an adjusting screw 18. As shown in FIG. 3A, the adjustment screw 18 is screwed into a female screw formed on the plate-shaped bracket 11 a, and the tip of the screw is supported by the support metal fitting 14 via the washer 16 and the split pin 17.
Installed on. For this reason, the support fitting 14 swings around the pin 13 as a center of rotation in a direction toward and away from the plate-shaped bracket 11a according to the amount of screw rotation of the adjusting screw 18, and the space between the paper pressing plate 6 and the sheet traveling surface is increased. The size of the gap can be adjusted.

A compression spring 19 is fitted on the adjusting screw 18, and the adjusting screw 18 is fitted by the compression spring 19.
The play of the support fitting 14 that engages with the tip of the support fitting 14 is eliminated, and the fluctuation of the adjusted support fitting 14 is prevented. Since the paper pressing device according to the first embodiment of the present invention is configured as described above, the distance between the bracket 11a and the support fitting 14 is set to a predetermined dimension by the adjusting screw 18 in advance at the start of printing. Insert the bracket 11 into the block 10. Then, the axial direction of the plate-shaped bracket 11a coincides with the sheet traveling direction,
In order to optimally set the size of the gap, the mounting position of the round bar-shaped bracket 11b is adjusted so that the paper pressing plate 6 and the sheet traveling surface of the feeder board 2a are parallel, and then fixed with the set screw 15. . Then, again, the parallelism of the paper pressing plate 6 is finely adjusted by the adjusting screw 18, and the adjusting position is fixed by the lock nut 20.

Such an operation is performed for all the paper pressing devices 44 arranged side by side on the shaft 8. With this setting, when the sheet 3 delivered onto the feeder 2 is conveyed to the vicinity of the front end of the feeder board, the sheet surface is corrected by the paper pressing plate 6 and runs.
At this time, since the size of the gap between the paper pressing plate 6 and the feeder board 2a is set optimally, the sheet 3 moves smoothly while being guided by the paper pressing plate 6, and the sheet pressing plate 6 is pressed. Generation of scratches due to pressure is suppressed as much as possible.

Then, the seat 3 is a front pad 4 of the seat 3.
It comes into contact with and stops, and the stop posture is adjusted. Then, with the front end position of the sheet being adjusted, the sheet delivery device 37
It is gripped by and transferred to the next process. As described above, since the gap between the paper pressing plate 6 and the sheet traveling surface can be easily adjusted by the amount of rotation of the adjusting screw 18 in accordance with the sheet thickness, the work time required for the adjustment can be shortened. It is possible to improve work efficiency. Further, even when the printing operation is performed, the gap can be adjusted according to the behavior of the sheet 3 without stopping the printing machine, so that the operation rate of the printing machine is not lowered in controlling the sheet posture. Contribute to the improvement of productivity.

Further, since the fine and quantitative adjustment can be made by the screw, the transfer state (running posture) of the seat 3 is obtained.
Can be stabilized. In other words, by pressing the front end of the sheet 3 delivered onto the feeder board 2a against the sheet traveling surface of the feeder board 2a with an optimum pressing force to guide the sheet surface, the sheet surface is corrected to be flat and the sheet 3 is prevented from rising or corrugating. The seat 3
It is possible to minimize the contact resistance between the paper pressing plate 6 and the paper pressing plate 6 and prevent the occurrence of scratches on the sheet surface. As a result, it is possible to prevent the sheet 3 from being bent due to the transportation and suppress the generation of the damaged paper, and at the same time, to improve the printing quality by eliminating the scratches.

Further, by stabilizing the stop posture of the seat 3, the swing arm 23 can surely grip the seat 3, and there is an advantage that the delivery of the seat 3 to the next process is stable. Next, a modified example of the first embodiment of the present invention will be described with reference to FIG. The paper pressing device 44 of the present modified example has a configuration in which the roller 21 is rotatably attached to the leading end of the paper pressing plate 6 in the paper pressing device 44 of the first embodiment. Further, in order to simplify the device configuration, the bearing 12 and the pin 13 for connecting the support fitting (support member) 14 and the plate-shaped bracket (stationary member) 11a are omitted and integrally joined by welding or bolts. is doing. Further, by integrally supporting the support fitting 14 to the plate-shaped bracket 11a, the support fitting 14 itself acts as a leaf spring, and the compression spring 19 for preventing play is unnecessary.

The paper pressing device 44 having such a structure
When the adjusting screw 18 is rotated at, the support fitting 14 elastically deforms in the direction in which it comes in contact with and separates from the plate-shaped bracket 11a. By controlling the amount of deformation of the support fitting 14 due to elastic deformation by the adjusting screw 18, the roller 21 swings toward and away from the sheet traveling surface of the feeder board 2a, and the roller outer peripheral surface and the sheet traveling surface are separated from each other. The size of the gap can be adjusted. The backlash of the adjusting screw 18 is eliminated by the support metal fitting 14 acting as a leaf spring.

When the printing machine is operated after the size of the above-mentioned gap is optimally adjusted by the adjusting screw 18, the sheet 3 moving in this gap is pressed against the sheet traveling surface by the roller 21 and rises or corrugates. Deformation such as is corrected. Then, the sheet is brought into contact with the front pad 4 and gripped by the sheet delivery device 37 in a state where the stop posture is adjusted and delivered to the next step.

The outer peripheral surface of the roller 21 may be made of an elastic material such as rubber in order to prevent the sheet surface from being damaged. Therefore, also in this modified example, fine and quantitative adjustment can be easily performed with the screw, and the same effect as that of the first embodiment can be obtained with a simple configuration without bearings and pins. Further, by making the support fitting 14 function as a leaf spring, the backlash of the adjusting screw 18 is eliminated without separately using the compression spring 19, so that the device configuration can be further simplified.

Further, since the sheet surface is flattened by the rotating roller 21, the contact resistance between the sheet 3 and the roller 21 can be reduced, and the size of the above-mentioned gap is set to be rough to some extent. Even if the seat 3 runs smoothly. Therefore, the adjustment work becomes easier.
Further, when the outer peripheral surface of the roller 21 is made of an elastic body such as rubber, it is possible to reduce damage to the sheet 3.
The adjustment range can be further widened.

Next, a second embodiment of the present invention will be described with reference to FIG.
Will be explained. Also in the paper pressing device according to the present embodiment, the same parts as those in the conventional technique described with reference to FIGS. 6 to 9 are denoted by the same reference numerals, and the description thereof will be partially omitted. The paper pressing device 44 according to the second embodiment of the present invention
In addition to the configuration of the paper pressing device 44 of the first embodiment, a motor 24 for rotating the adjusting screw 18 and a gear 2 for converting the motor rotation into the rotation of the adjusting screw 18.
6, 27, an encoder (rotation speed detection means) 29 for detecting the rotation speed of the adjusting screw 18, and a control device (control means) 28 for controlling the motor rotation amount.

The motor 24 is mounted on a bracket 25 fixed to the plate-shaped bracket (stationary member) 11a. Then, the drive is controlled by the control device 28, and the gear 27 fixed to the motor shaft end is rotated. The gear 26 is fixed to the rear end of the adjusting screw 18 and meshes with the gear 27 to adjust the motor rotation.
It is designed to be converted into rotation. And the gear 26
The rotation of is detected by the encoder 29, and the detection result can be fed back to the control device 28 as a control signal.

It is also possible to preset the control signal to be sent to the control device 28 in the encoder 29. Since the paper pressing device 44 according to the second embodiment of the present invention is configured as described above, when the operator sets the adjustment amount of the adjusting screw 18, the control device 28 is activated.
The target rotation speed of the adjusting screw is calculated by and the motor is driven. Along with this, the gear 27 attached to the motor shaft end rotates, and the adjusting screw 18 rotates via the gear 26. The rotation speed of the adjusting screw 18 is detected by the encoder 29, and the detection result is fed back to the control device 28 to control the motor rotation amount.

Then, the motor 24 is driven until the rotational speed of the adjusting screw 18 reaches the target rotational speed, and the adjusting screw 18
When it is detected that the number of revolutions reaches the target number of revolutions, the control device 28 stops the motor 24. Therefore, also in the present embodiment, the same effect as that of the first embodiment can be obtained, and more accurate adjustment can be performed by driving the motor 24 by electronic control, and further, the time required for the adjustment can be increased. It can be shortened.

Further, since the screw rotation amount can be adjusted by remotely controlling the motor 24 by the control device 28, it is not necessary for the operator to approach the feeder board 2a, there is no danger of being caught in the machine, and the safety of work is ensured. You can secure the sex. Furthermore, by setting the above adjustment amount for the sheet thickness, machine speed, etc. in advance, it becomes possible to automatically control in response to changes in the printing situation, and the time required for adjustment can be greatly shortened. You can

The present invention is not limited to the above-described embodiment, and various modifications can be carried out without departing from the spirit of the present invention. For example, the first and second
The configuration of the roller 21 shown in the above modification can be added to the paper pressing device 44 of the embodiment. In this case, in addition to the effects of the corresponding embodiments, there is an advantage that the adjustment work can be facilitated.

At this time, the outer peripheral surface of the roller 21 may be made of an elastic material to reduce damage to the sheet 3. Further, also in the paper pressing device 44 of the second embodiment,
As shown in the modified example of the first embodiment, the support fitting (support member) 14 is replaced by a plate-shaped bracket (stationary member).
Alternatively, the paper pressing plate 6 may be integrally joined to 11a so that the paper pressing plate 6 swings toward and away from the sheet traveling surface of the feeder board 2a by elastic deformation of the support fitting 14. With this, it is possible to obtain the same effect as that of the modification.

[0041]

As described above in detail, according to the present invention,
Since the gap between the paper pressing plate and the sheet traveling surface can be easily adjusted by the amount of rotation of the adjusting screw, the work time required for the adjustment can be shortened and the work efficiency can be improved. Also, even when the printing press is in operation, the size of this gap can be adjusted according to the behavior of the sheet without stopping the printing press, thus improving the operating rate of the printing press and improving productivity. To do.

Further, by finely and quantitatively adjusting the swing amount of the supporting member with the position of the stationary member as the reference by the adjusting screw, the size of the above-mentioned gap can be adjusted accurately and reproducibly, and as a result, the sheet transfer It is possible to simultaneously achieve reduction of wasted paper and improvement of print quality. In other words, by pressing and guiding the traveling sheet from above with the optimum pressing force, it is possible to correct the sheet surface flatly and prevent the sheet from rising and corrugating, and also to reduce the contact resistance between the sheet and the paper pressure plate. It can be minimized to prevent scratches on the seat surface. (Claim 1).

At this time, if the support member is swingable about the pin as the center of rotation, when the adjusting screw is rotated, the support member can swing smoothly about the pin without applying an excessive load. it can. Further, since the adjustment position of the support member is fixed in the state where the restoring force of the spring acts, the fluctuation of the adjustment position due to the looseness of the adjustment screw is prevented (claim 2).

On the other hand, when the support member made of an elastic body is integrally joined to the mounting portion of the stationary member, the support member elastically deforms when the adjusting screw is rotated, and this restoring force is restored. Due to this, the adjustment position is fixed while being biased in the restoring direction. Therefore, it is possible to prevent the adjustment position from fluctuating due to the backlash of the adjusting screw with a simple structure without separately providing a member having a biasing action such as the above-mentioned spring between the stationary member and the supporting member. Item 3).

Further, a roller is rotatably attached to the front end of the paper pressing plate, and the roller is configured to rotate while the sheet travels while being in contact with the traveling sheet, so that the sheet is pressed with a constant pressing force. The surface can be pressed against the running surface to flatten it. At this time, since the contact resistance between the roller and the sheet is reduced due to the rotation of the roller, the size of the gap between the roller and the sheet traveling surface can be roughly set to some extent, and the adjustment work can be performed more easily. (Claim 4).

At this time, if the outer peripheral surface of the roller is made of an elastic material, damage to the sheet can be reduced and the adjustment range can be further widened (claim 5). When the adjusting screw is rotated by the motor driven and controlled by the control means, the operator can perform the adjustment with higher accuracy than when the adjusting screw is visually rotated, and the time required for the adjustment can be shortened. You can
Further, since the adjustment can be performed by remote control, the operator does not need to approach the printing press, and the risk of being caught in the machine can be avoided (claim 6).

At this time, when the number of rotations of the adjusting screw is detected and the detection result is fed back to the control means, the adjustment amount is set in advance for the sheet thickness, machine speed, etc. The automatic control can be performed according to the change of the printing condition, and the time required for the adjustment can be greatly shortened (claim 7).

[Brief description of drawings]

FIG. 1 is a side sectional view showing an overall configuration of a paper pressing device according to a first embodiment of the present invention, which is a view corresponding to FIG. 9.

FIG. 2 is a plan view of the paper pressing device according to the first embodiment of the present invention viewed from above a sheet traveling surface.

FIG. 3 is an enlarged view showing a main part of the paper pressing device according to the first embodiment of the present invention, (a) is an enlarged view of an adjusting device, and (b) is a connection between a bracket and a support fitting. It is an enlarged view of a part.

FIG. 4 is a side sectional view showing an overall configuration of a paper pressing device according to a modified example of the first embodiment of the present invention, which is a view corresponding to FIG. 9.

FIG. 5 is a side sectional view showing an overall configuration of a paper pressing device according to a second embodiment of the present invention, which is a view corresponding to FIG. 9.

FIG. 6 is a side view showing a configuration of a conventional sheet-fed printing press.

FIG. 7 is a diagram for explaining the problem of the conventional paper pressing device, and is a diagram for explaining the operation of the sheet supply unit of the conventional sheet-fed printing press.

FIG. 8 is a diagram for explaining the problem of the conventional paper pressing device, and is a diagram for explaining the operation of the sheet delivery device in the conventional sheet-fed printing press.

FIG. 9 is a side sectional view showing an overall configuration of a conventional paper pressing device.

[Explanation of symbols]

1 sheet feeding device 2 feeder 2a feeder board 3 sheets 4 In front 5 First intermediate body 6 Paper holding plate 8 shafts 9 thumb screw 10 blocks 11, 11a, 11b Bracket (stationary member) 12 bearings 13 pin 14 Support fittings (support members) 15 Set screw 16 washers 17 split pin 18 Adjustment screw 19 Compression spring 20 lock nuts 21 Laura 22 fulcrum axis 23 swing arm 24 motor 25 bracket 26, 27 gears 28 Control device (control means) 29 Encoder (rotation speed detection means) 30 printing devices 31 Paper feed table 32 sheet conveyor belt 33 drive roller 34 Guide roller 35 Paper pressing device 36 Horizontal needle device 37 sheet delivery device 38 impression cylinder 39 Middle trunk 40 nails 41 Nail seat 42,43 claw device 44 Paper pressing device 45 suction box 50 frames S gap

Claims (7)

[Claims] 1. A paper pressing device located at the most downstream part of a feeder of a sheet-fed printing press, wherein the paper pressing plate is disposed substantially parallel and close to the sheet traveling surface, and the sheet traveling surface. A stationary member that is fixed in position, one end attached to the stationary member, and a support member that supports the paper pressing plate at a position distant from the mounting portion, and a support member at a position distant from the mounting portion. A paper pressing device comprising a stationary member and the supporting member, and an adjusting screw for connecting and disconnecting the stationary member and the supporting member according to a rotation amount. 2. The support member is attached to the stationary member via a pin at the attachment portion, and further comprises a spring interposed between the stationary member and the support member. The paper pressing device according to claim 1. 3. The support member is formed of an elastic body and is integrally joined to the stationary member at the mounting portion.
The described paper pressing device. 4. The paper pressing device according to claim 1, wherein a roller is rotatably attached to the front end of the paper pressing plate. 5. The paper pressing device according to claim 4, wherein the outer peripheral surface of the roller is made of an elastic body. 6. The motor according to claim 1, further comprising a motor for rotating the adjusting screw and a control means for controlling a rotation amount of the motor. Paper holding device. 7. The rotating speed detecting means for detecting the rotating speed of the adjusting screw is further provided, and the control means receives the target rotating speed of the adjusting screw and outputs the detection result from the rotating speed detecting means. 7. The paper pressing device according to claim 6, wherein the rotation amount of the motor is controlled so that the rotation speed of the adjusting screw becomes the target rotation speed.