JPS5810343B2 - Sheet-fed printing press discharge device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a paper discharge device for a sheet-fed printing press.

A conventional sheet-fed printing press discharge device has a configuration as shown in FIGS. 1 and 2.

Although some parts differ depending on the model manufacturer, the principle is the same.

In the figure, 1 is the machine frame of the printing press, 2 is the delivery chain,
Reference numeral 3 indicates the opening claws of the paper sheets 10 installed at equal intervals on the chain, 5 indicates a suction wheel, 6 indicates a stacking board for stacking sheets, 7 indicates a hanging chain for the board, and 8 indicates a sprocket wheel for driving the chain. , 9 is a weight.

The sheet 10 passes through the printing unit (not shown) on the right side of FIG.
The tip is held in the gripping claw 3 of the board 6 and brought one after another at high speed above the board 6.

Further, the rear end of the sheet 10 is held by the action of the suction wheel 5.

Therefore, the sheet is kept horizontal directly above the board 6.

Immediately after this, the sheet 10 is released by the opening action of the claw 3 and detached from the suction wheel 5, and is allowed to fall onto the board.

Further, various types of guards are installed on the paper ejecting device to prevent the sheets 10 from falling and to neatly pile them up on the board.

The pad is usually formed of a plate, a comb-shaped needle, etc., and consists of a front pad 11, a rear pad 12, and left and right side pads 13 in the direction of paper travel.

A rectangular tube-like sheet path is formed between the delivery chain 2 and the board 6 by these supports.

By the way, the sheets 10 are not piled up on the board as long as there is a fear of show-through, and they are not stacked on the board 1 as shown in the figure.
4 and a block 15 supporting the board is interposed between the piles of sheets.

Considering the amount of ink, pattern area, paper quality, etc., if it does not appear to show through, it will be stacked.

However, in high-quality printing, bar stacks are usually avoided.

In order to perform the intervening work of the plate 14 and the block 15 and the replacement work of the paper discharge pallet, the paper discharge device is provided with a guide rail 16 for the plate, and the chain T and the plate 6 are moved at a normal continuous or intermittent lowering speed. A drive device (not shown) is provided for lowering or stopping the vehicle.

Therefore, the procedure for this intervening work will be explained based on FIG. 3.

Assume that the maximum amount of sheets 10 that will not cause show-through are stacked on the board 14 as shown in Figure A.

Then, the speed drive device is operated by the operator, and the plate 14 is moved along with the panel 6 to the abutments 11 and 12 as shown in Figure B.
, 13 by an appropriate distance.

Immediately after being lowered, another plate 14 is quickly inserted into the guide rail 16 by about two people.

Subsequent falling papers hit this plate and are subjected to the action of 11°12.13, resulting in 5 stacks.

In the meantime, as shown in Figure 6, the operator places blocks on the four corners of the sheet in the previous stage, then operates a switch to raise the board 6 and bring the block 15 into contact with the following inside the guide rail.

Thereafter, the guide rail 16 is removed by the operator (from the position shown by the chain line in FIG. 1 to the position shown by the solid line), and the newly installed plate 14 is released and lowered as the board 6 gradually descends, returning to the state shown in FIG. A. The interposition work for the next board will have to wait until this happens.

However, the method of interposing the plate 14 as described above has a serious defect.

This is because, as shown in FIG. 3B, the sheets 10 continue to fall even while the sheets 14 are interposed.

In other words, the sheet gets caught on the tip of the board and gets damaged.

Since the sheets 10 are damaged each time the plate 14 is inserted, the cumulative amount of damage is enormous.

There are also other deficiencies.

In other words, immediately after the board 6 is suddenly lowered to change the state from Figure A to Figure B, the stack of sheets under the newly inserted board is hit 11, 12.
, 13 degrees, so the sheets 10 will pile up in arbitrary directions until the new board is inserted, and it will take two or three people to manually prevent this. be.

As a means to prevent such drawbacks, a paper ejecting device has been proposed, for example, as disclosed in Japanese Patent Application Laid-Open No. 131709/1983.

During the work of inserting frames, boards, and blocks, the leading and trailing ends of one sheet of paper are suctioned at several points each using a suction member, and subsequent sheets of paper are held on top of the suction member. This is an attempt to cut off the flow of paper sheets.

However, since this device has a small holding force for sheets, it cannot support the paper due to the weight of the paper piled on top of the board and block, and the paper falls down. The disadvantage is further exacerbated by the fact that powder, etc., which are sprayed to prevent set-off, clog the suction member and extremely reduce the suction force.

Therefore, the inventors of the present invention have already completed the installation of the plate 14 by providing a support made of a telescopic body that protrudes from the rear of the halo 12 toward the front support 11, and inserting sheets of paper that are normally no longer affected by the support. To date, a device has been invented which corrects the above-mentioned drawbacks by using a telescopic body to receive the device.

The present invention is a further development of the above-described invention to create a fully operational sheet delivery device.

A detailed explanation will be given below based on the drawings.

The telescopic body proposed earlier is shown in Figures 4 and 5, and when the state shown in Figure 3A is reached, the solenoid valve can be remotely controlled by, for example, obtaining a timing signal from the running of the claw 3 of the delivery chain. Then, compressed air is instantly injected into the telescopic body.

Then, as shown in FIG. 4, the telescopic body 17 protrudes from the halo 12 toward the front cover 11 at a very high speed, thereby preventing the occurrence of the situation as shown in FIG. 3B.

In this way, the succeeding sheets are fully extended and supported by the telescopic body, and are neatly stacked on top of them under the action of the abutments 11, 12, and 13, during which time the disk 6 is lowered and the sheets are stacked on top of each other neatly as shown in FIG. 3C. Interposition work between the plate 14 and the block 15 is performed.

After this work is completed, the string is wound around the winding drum, so that the stretched telescopic body is contracted, and the succeeding paper is dropped onto the newly inserted board.

At this time as well, the sheets are stacked without any disturbance because they are under the action of the counter.

Thereafter, the guide rail 16 is removed and the new board is gradually lowered along with the normal lowering of the board 6.

In this case, the tip of the telescopic body should be set so as to protrude slightly beyond the front cover 11, and the tip should be supported by a rod that is a component of the front cover 11, or a new one should be provided. It may be supported by a support member (not shown) provided separately from the rod 11' or the front support.

By hiding it, it is possible to prevent the sheet of paper from shifting or falling due to the deflection that occurs in the telescopic body when the sheet of paper is placed on it.

Now, the telescopic body of the present invention is composed of a tip rod unit A1, an intermediate rod unit B, a BJ-base rod unit C, and each rod body has a drawn tube (0
, 1mm to 0.5mm brass tube, chrome plated).

First, for convenience of explanation, the intermediate rod units B and B' will be explained. In FIG. 6, the tip of the rod body 20 is bent inward 21, and a bushing 22 is attached to the rear end.

The rod body 20 and the bushing 22 are such that the cylindrical part 22a of the bushing 22 is inserted into the rod body 20 up to its collar,
It is integrated into the cylindrical portion 22a by drawing process 23.

An annular stopper 24 is attached to the outer periphery of the bush attachment portion of the rod body 20.

The annular stopper 24 has the same inner diameter as the outer diameter of the rod body 20 and the same wall thickness as the rod body 20, and has a bent portion 21.
It is inserted into the rod body 20 from the side.

The rod bodies having different sizes and diameters as described above are sequentially assembled to form an intermediate rod unit.

The one shown consists of two unit combinations, and the combination operations are performed in the following order.

(1) Prepare the rod body 20, bushing 22, and annular stopper 24, and bend the rod body 20 inward in advance 21.

(2) Assemble lot unit B with the smallest diameter.

That is, the process is completed by inserting the cylindrical portion 22a of the bushing 22 into the rear end of the rod body 20.

(3) The rod unit B with the smallest diameter is inserted into the rod unit B' with the next diameter from the rear end of the rod body 20' toward the tip.

(4) Next, insert the bushing 22' into the rod body 20' of the rod unit B', then insert the wringing knife 23', and insert the stopper 24' from the direction of the rod unit B with the smallest diameter.

(5) The intermediate telescopic body is completed by sequentially assembling units with larger diameters as described above.6 Next, the tip rod unit A consisting of the rod body 30, bushing 32, and annular stopper 34 is assembled in the intermediate telescopic body as described above. Before assembling the telescovit body, it is inserted into the rod body 20 of the rod unit B with the smallest diameter, and the tip is not bent 21.

Instead, it is closed with a plug 25, a cylindrical slider 26 is inserted into the rod body 30, a spring 27 is inserted between the slider 26 and the bush 32, and the end of a string 28 is wound up when contracted. is attached to the slider 26.

Note that the stopper 25 may be made removable.

In other words, if the string breaks due to a problem such as a break, stopper 2
This is so that the slider 26 and spring 27 inside the rod body 20 can be removed and replaced by removing the slider 26 and the spring 27.

Further, the spring 27 serves to buffer the excessive force exerted on the string 28 at the end of the contraction operation and prevent the string from breaking.

Of course, when the enforcement operation is completed, the clutch is disengaged and the power from the motor is not transmitted, but this may be due to a slight time difference or a slight difference in the length of the strings of the plurality of telescopic bodies.

This is because consideration was given to compensate for the delay in movement when the telescopic body partially contracts.

However, the spring 27 can be omitted.

Next, the base rod unit C is constructed as follows.

That is, the rod unit B is installed at the tip of the rod body 29.
A stopper 31 that can be freely engaged and detached from the annular stopper 24' of I
A hexagonal nut 35 is next to the threaded portion 36 at the rear end, and a bush 37 serving as a stopper is formed on the inner surface of the threaded portion 36.

The bush 22' is in contact with this bush 37.

The assembled units A, B, and B' are inserted from the threaded portion 36 side of the base rod unit C, and then the stopper 3
7 is installed.

The threaded portion 36 of the base rod unit C is connected to the air inflow pipe 1
8 screwed into the screw hole 38.

The rod body of this base rod unit C is constructed with a wall thickness larger than that of other rod units, so that the rod unit will not be damaged even if an external impact force is applied.

This has the role of a telescopic body storage tube rather than a rod unit.

The threaded hole 38 of the air inlet pipe 18 is an inlet for air, and is also a hole through which the string 28 attached to the leading end of the telescopic body is passed.

Reference numeral 39 denotes a string passing hole, and in order to prevent friction with the string and damage to the string, the inner surface of this hole is preferably chamfered at both ends as shown.

The thin string 28 is preferably made of a single thread such as nylon or Tetron, or a synthetic fiber such as twine, or a twisted thread of metal fiber, which has a certain degree of flexibility and high tensile strength.

Further, in FIG. 6, 40 is a guide pulley, and 41 is a string winding drum.

This winding drum is driven by a motor via a clutch mechanism.

In the embodiments described above, the telescopic body is connected to the air inflow pipe by screwing the threaded portion of the base rod unit into the threaded hole of the air inflow pipe.
As shown in the figure, there is also a method of cutting one end of a pipe 18 with a wall thickness of about 10 mm into a flat surface 18C and screwing it.

Other possible methods include connecting with pipe joints and welding the air inlet pipe to the telescopic body, but these methods require connecting multiple telescopic bodies in parallel.
The method shown in FIGS. 8 and 9 is preferable in view of the ease of replacing the telescopic body when it is damaged, the strength of the connection part that must withstand the load of the sheet, and the degree of difficulty and accuracy when working the pipe.

Further, the string passing hole 39 may be formed directly in the pipe as shown in FIG. 9, but it may also be formed by screwing a resin pipe 42 into the slotted portion as shown in FIG. 10.

Next, connect the end of the string 28 connected to the telescopic body to the drum 4.
1, use any of the methods shown in FIG. 11, A, B, or C.

11A and 11B show a method in which a stopper 28a is formed at the end of the string 28, the stopper 28a is inserted into a hole 28b as shown in FIG. 11A, and the string is wound in the direction of the arrow.

FIG. 11C shows a method of tying the end of the string 28 to the pin 43.

Moreover, instead of the drum 41, the string winding body may have a pulley attached to the shaft.

The rotating shaft to which this drum or pulley is attached is connected to a motor via a clutch device, which will be described later.

Therefore, an embodiment of a sheet discharge device for a sheet-fed printing press having the telescopic body 17 will be described with reference to FIGS. 12 to 15.

The telescopic body 17 is attached to a base 44 that serves as a support jig for attachment to the frame of the printing press.

45 is a mounting jig (not shown) that comes out from the frame of the printing press
46 indicates a clamp for the air inflow pipe 18.

A pipe cover 47 is provided on the outer periphery of the base rod unit of the illustrated telescopic body 17 with a liner 48 interposed therebetween.

This protects the telescopic body and may be omitted if the base rod unit is thick.

Further, the illustrated telescopic body 17 is provided with a height adjustment mechanism.

That is, the angle adjustment bar 49.49 is attached to the air inflow pipe 18 close to the clamp 46.46, and the lower end of the bolt 50.50 screwed to the tip of the bar is in contact with the surface of the base 44 or the base 51. and bolt 5
The angle of the telescopic body is adjusted by adjusting the screw tightening.

When a telescopic type is loaded with several dozen sheets,
Due to its weight, it will "bend" slightly downward, so set it slightly upward.

If this angle can be a constant value, it may be fixed.

Also, by attaching a screw to the center of the clamp 46.46 and fixing the air inflow pipe 18 with the tip of the screw to adjust the angle, the angle adjustment bar 49.49
may be omitted.

The illustrated guide pulley 40 is provided on an idler shaft 52 of a banger 51 attached to the air inflow pipe 18, and is provided with a cord pull-out prevention plate 40a.

However, this guide pulley is used to attach the winding drum to the bottom, and if there is sufficient installation space, it can be omitted.

In addition, the idler shaft 52 is chrome plated,
If you cover the surface of the idler shaft with iron,
The string 28 becomes more slippery, the shaft itself can be used as a guide rod, and the guide pulley 40 can be omitted.

The winding drum 41 is driven by driving a roller shaft 56 from a servo motor 53 via a gear unit 54 and a clutch device 55.

The illustrated winding drum 41 is rotatable because its roller shaft 56 is supported by a flange unit 57 of the base 51 and a flange unit 58 of the base 44. A servo motor 53 is supported via 60.

Reference numerals 61 and 62 denote a clutch side plate and a motor side plate, which are interposed between the stud bolts 59 as described above.

The roller shaft 56 supported by the other flange unit 58 has a pinion 63 that meshes with a limit gear 64.

The limit gear 64 has a slit hole 65, and the protrusion 66 slides in the slit hole 65 to adjust its position.

Limit switch 6 operated by this protrusion 66
7.68 is also attached to the limit switch plate 69 so as to be adjustable in position, and the above-described position detection mechanism is provided within the cover 70 attached to the base 44.

The position detection mechanism is determined by the meshing of the pinion 63 and the limit gear 64, and the extension length of the telescopic body (for example, 850 mm) corresponds to several rotations of the winding drum 41 (for example, 4.5 rotations of a drum having a diameter of 60 mm).

The ratio of the pinion 63 and limit gear 64 to the drum 41
(For example, gear ratio 5 to 6)
), the position of the telescopic body 17 during expansion and contraction is changed to the position of the outer periphery of the rotating body of the detection mechanism.

Then, the protrusion 66 hit the limit switch 67.68.
By doing this, a position signal of the telescopic body 17 can be obtained.

For clutch devices equipped with a brake mechanism,
The extension and contraction of the telescopic body is detected by a detector, the clutch (brake) is released at the time of extension, and the brake is applied at least immediately after extension.

Further, if the clutch device or motor is provided with a mechanism that does not transmit more than a certain torque, the position detection mechanism is not necessary.

A clutch device also does not require a brake, and a clutch or one with a brake limit is used.

Note that the center of the winding drum 41 is determined by a center tension bar stretched between the drum 41 and the flange unit 57.

Others 71 are protectors for the string 28.

Although not shown in the paper discharge device of the present invention, there is a compressor for feeding air, a solenoid valve for turning the air ON/OFF, a sensor for detecting the position of the sheet (claw position) of the printing machine, and a telescopic body 17. Needless to say, a mechanism for emitting a signal to obtain the timing of launch is required.

For example, the following mechanism may be used to obtain this timing signal and open the solenoid valve.

A printing machine normally emits a signal once per rotation, and a pulse signal a as shown in FIG. 16 is output, which is used in a counter or the like for counting the number of sheets of paper.

When the board cutting switch is turned on (manual) to operate this device, the signal is latched (retained for 1 hour) as shown in C, and the pulse signal a from the printing machine is emitted after the signal.
' One-shot, multivibrator (O, S) synchronized with (AND circuit).

M) generates a pulse signal d.

By applying a delay to the pulse signal using, for example, a timer to provide an appropriate delay, the solenoid valve can be opened to cause the telescopic body to extend.

Then, the number of pulses a (corresponding to the number of sheets of paper) after the output of pulse e is counted, and when the number of sheets that the telescopic body can support approaches the limit, an alarm is issued and the operator is instructed to speed up the board removal. It is desirable to encourage caution.

Next, the operation of the device of the present invention (when only the clutch device or when the clutch device is equipped with a brake mechanism) is performed in accordance with the sequence shown below.

(1) When the board cutting switch is turned on, the aforementioned trigger signal is emitted only when the claw is at the appropriate position.

This board removal switch may be linked with a switch that lowers the pile, that is, the board, or may be moved in after it has been moved a little.

(2) Upon receiving this timing signal, the air feed solenoid valve opens and the brake is released.

(3) The telescopic body 17 is extended, and when this is completed, the brake is applied by the limit switch 68 and the solenoid pulp is closed.

(4) Place the blocks 15 and the board 14 on the lowered board 6.

However, the latter part 6 rises. (5) Telescopic body 17
When the board cutting end switch is turned on to contract, the motor 53 rotates, and the brake is released and the clutch is engaged to rotate the winding drum 41.

The board cutting end switch may be turned on automatically after a certain period of time has elapsed after the board cutting switch is turned on, or after a certain number of sheets have been discharged.

Alternatively, it may be configured to enter automatically when the rear stage rises.

(6) When the telescopic body completes contraction, the limit switch 67 is turned on, the clutch is disengaged, the brake is applied, and the motor 53 is stopped.

The brake is provided for the purpose of preventing the string 28 from being wound up in the opposite direction due to the inertial force of the winding drum 41 after the telescopic body has finished its stretching operation.

If the clutch device or motor is equipped with a mechanism that does not transmit more than a certain torque, the following applies.

(1) When the board removal switch is turned on, a timing signal is generated in the same manner as described above.

(2) Upon receiving this timing signal, the air feed solenoid valve opens and the clutch disengages.

(3) The solenoid valve is kept open for a certain period of time (for example, 1 second) by a timer or the like, and then closed.

During this time, the telescopic body 17 is extended.

The string rotates in the opposite direction due to the inertial force of the rotating shaft, and the string is wound up a little, causing the telescopic body to contract a little again. However, since air has been pumped in during this time, the air pressure causes the telescopic body to rotate in the opposite direction again. Elongation is complete.

(4) Place the block 15 and stacking board 14 on the lowered board 6.

After that, board 6 rises. (5) When the board removal end switch is turned on, the motor 53 rotates, the clutch is engaged, and the winding drum 41 rotates.

(6) Even if the telescopic body is completely retracted, the motor 53
If the motor tries to rotate, excessive torque will be generated and the torque limiter built into the remoter will work and stop the motor.

The set torque of the torque limiter is stronger than the force that winds up the telescopic body with a certain amount of paper on it, and
Set lower than the pull strength.

Because there are multiple telescopic bodies and multiple strings, and because of the action of the spring 27 inside the telescopic body, there is no excessive force on the strings, so the set torque can be set quite large, and the motor can hold the sheet while the sheet is on it. Trouble such as stoppage can be avoided.

In addition, in order to prevent the telescopic bodies at both ends from operating when the inside of the paper changes, the telescopic bodies 17 that do not need to be operated are used.
This is accomplished by removing the string 28 from the drum 41 and fixing it to a pipe section, or by attaching a weight to the end of the string and letting it hang below the guide pulley 40.

Furthermore, when a pulley is used instead of the winding drum, the pulley and roller shaft can be uncoupled using a clutch or the like to prevent the pulley from rotating at the same time as the motor shaft.

As described above, the present invention provides: a) a plurality of telescopic bodies which are telescopically disposed opposite the front cover from the rear of the sheet and serve as temporary holders for the sheet when the sheet is stretched;

b) An air inflow pipe that supports the base of the telescopic body and has a piping port at the end for feeding air.

C) A rotating shaft connected to the end rod unit of the telescopic body and equipped with a drum or pulley for winding up the string that passes through the air inflow pipe through the telescopic body.

d) A motor that drives the rotating shaft.

e) A clutch device that is provided between the rotating shaft and the motor and connects the drives of both when the telescopic body is contracted.

f) A support jig for assembling the above and attaching it to the frame of the printing press.

Since it consists of each structure, when intervening work of boards and blocks, the telescopic body is projected instantaneously or at a very high speed to cut off the fall of the following paper below the rest. I can do it.

Therefore, it is possible to completely prevent the damage and breakage of sheets that conventionally occur, to completely prevent the occurrence of sheets that are no longer subject to the action of the support, and to achieve labor savings by eliminating the need for paper alignment personnel. It has the characteristic of being able to

Furthermore, when a clutch, a brake device, and a position detection mechanism are used together for the telescopic body's expansion and contraction operations, the telescopic body is characterized in that it operates properly without causing malfunctions.

Furthermore, if a motor with a torque limiter is used, the structure becomes simpler, and the motor can be manufactured more widely and at lower cost.

[Brief explanation of the drawing]

Figures 1 and 2 are front and side views of the paper ejection device, Figures 3A and B
, C is an explanatory diagram of the process of conventional plate interposition work, Fig. 4 is an explanatory diagram of the operation when the telescopic body is extended, Fig. 5 is an oblique view of the telescopic body, and Figs. 6 and 7 are illustrations of the telescopic body when it is extended and contracted. 8.9 is an exploded and cut front view of a modified embodiment of the telescopic body; FIG. 10 is an explanatory diagram showing a modified embodiment of the air inlet pipe; FIG. 11A , B, and C are explanatory diagrams showing the attachment state of the winding drum and the string, Fig. 12 is a plan view of the device of the present invention, Fig. 13 is a front view of the device of the present invention, and Fig. 14 is the right side of the device of the present invention. Front view, 1st
FIG. 5 is a left side view of the device of the present invention, and FIG. 16 is a diagram illustrating the timing signal for ejecting the telescopic body. 17...Telescopic body, 18...Air inflow pipe,
28... String, 40... Guide pulley, 41... Winding drum, 44... Base, 53... Servo motor or motor with torque limiter, 55... Clutch brake or clutch, 56... Rotating shaft or roller shaft.

Claims (1)

[Claims] 1. A paper discharge device for sheet-fed printing comprising the following configuration. a) A plurality of telescopic bodies which are telescopically installed opposite the front plate from the rear of the sheet and serve as temporary holders for the sheet when it is extended. b) An air inlet pipe that supports the base of the telescopic body and has a piping port at its end for feeding air. C) A rotating shaft connected to the end rod unit of the telescopic body and having a drum or pulley for winding up the string that passes through the air inflow pipe with a diameter inside the telescopic body. d) A motor that drives the rotating shaft. e) A clutch device that is provided between the rotating shaft and the motor and connects the drives of both when the telescopic body is contracted. f) A support jig for integrating the above and attaching it to the frame of the printing press.