JPH0422141B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) This invention relates to a locking mechanism for a reprinting device in a sheet-fed rotary printing press.

(Prior art) In general, for reprinting such as numbering on a sheet-fed rotary printing press, a reprinting device is attached to the machine base, and at the same time, the reprinting device prints on the printing paper. are giving.

However, this reprinting device requires manual locking of the reprinting device to the machine.
Installation is complicated and requires labor.

(Problems to be Solved by the Invention) As described above, the present invention attempts to solve the problem that the installation work is complicated and labor-intensive.

Structure of the invention (means for solving the problems) In order to solve the above problems, this invention
The piston rod 3 of the air cylinder 34 is operated by a limit switch 31 provided on a part of the machine base 1.
A link part 36 that rotates in a chain according to the movement of the link part 5 is connected to the tip of the link part 5, and a holding part attached to the link part 36 is connected to the additional printing units 50, 51 of the additional printing apparatus d attached to the machine base 1. A lock plate 79 is provided with which the tip of the rod 47 comes into contact and is locked when it rotates.

(Function) By employing the above-described means, the holding rod 47 of the link portion 36 rotates,
It abuts and locks against the lock plate 79 of the additional printing units 50, 51 to prevent the additional printing units 50, 51 from detaching from the machine base 1.

(Example) Hereinafter, an example in which the present invention is embodied in a numbering device lock mechanism of a sheet-fed rotary printing press will be described in detail with reference to the drawings.

Figure 1 shows a sheet-fed rotary printing press,
A plate cylinder 2, a blank cylinder 3, and an impression cylinder 4 are supported on the machine base 1 so as to be interlocked with each other, and openings 5a and 5b are formed in the machine base 1 on both left and right sides thereof.

As shown in FIG. 2a, a part of the plate cylinder 2 is provided with a plate attachment part 8 consisting of a fixed clamping piece 6 and a movable clamping piece 7. The starting edge of the plate 9 is clamped and supported, and the plate 9 is placed around the outer periphery of the plate cylinder 2.
It is designed so that it can be rolled and supported. Said plate cylinder 2
An inking device 10 is mounted on the machine base 1 adjacent to the outer periphery of the inking device 10.
and a water roller device 11 are disposed, and these inking and water roller devices 10 and 11 cause the plate cylinder 2 to
Ink and water are applied to the upper plate 9.

A paper supply device 12 is disposed on the right side of the machine stand 1, and printing paper P is supplied from this paper supply device 12 to the outer periphery of the impression cylinder 4 through an opening 5b. The ink applied to the printing plate 9 on the printing cylinder 2 is transferred to the blanket of the printing cylinder 3, and printing is performed on the printing paper P on the impression cylinder 4. Below the impression cylinder 4, two pairs of sprockets 13 and 14 (only one pair shown) facing each other in the front and rear are rotatably disposed on the machine base 1, and a chain 15 is suspended between these sprockets 13 and 14. has been done. As this chain 15 runs, the printed printing paper P
The paper sheets are transferred to a paper discharge tray 16 while being held by paper discharge claws (not shown) provided on the chain 15, and are stored in a stack on the paper discharge tray 16.

Further, although the plate cylinder 2, blank cylinder 3, and impression cylinder 4 are interlocked by meshing gears provided at one end of each, only the gear 17 of the impression cylinder 4 will be particularly described here. That is, as shown in FIG. 3, a triangular positioning piece 18 is fixed to the inner surface of the gear 17 of the impression cylinder 4 with a screw 19 or the like. Next, the stop position determining device 20 provided in the rotational drive system of the impression cylinder 4 will be explained.
As shown in FIGS. 2b and 2c, a rotating disk 21 is attached to the shaft end of the impression cylinder 4, and a recess 2 is provided on the outer periphery of the rotating disk 21.
2 is formed. A light emitting element 23 and a light receiving element 24 are arranged facing each other on both sides of the rotating disk 21.
When the positioning piece 18 is directed toward the opening 5a, the recess 22 on the rotating disk 21 is located between the light emitting element 23 and the light receiving element 24. Therefore, the light receiving element 24 detects the light from the light emitting element 23 and outputs a predetermined detection signal.

As shown in FIG. 1, an operation box 25 is provided at the upper left side of the machine 1.
A start/stop switch 26 is provided for controlling the operation of the printing press. Also, operation box 2
5 is provided with a low-speed start switch 27, and by operating this low-speed start switch 27 after the operation is stopped based on the operation of the start/stop switch 26, the impression cylinder 4, plate cylinder 2, and blank cylinder 3 are brought to a low speed. After that, when a detection signal is output from the light receiving element 24 of the stop position determining device 20, the low speed movement is stopped. Therefore, when the printing machine is stopped, the positioning piece 18 of the impression cylinder 4 is always oriented toward the opening 5a.

Further, as shown in FIG. 5, an operating lever 28 in the form of a long plate consisting of a cam, a crank, etc. is mounted in the machine base 1 so as to be rotatable around its lower end, and is normally pulled out. It is held in a forward (leftward) inclined state by a tension spring 29. As shown in FIG. 7, the upper end of the operating lever 28 protrudes from a moving groove G transparently provided in a support portion 33 that protrudes from the front of the machine base 1, and is further recessed rearward from the upper front edge of the protruding portion. An engagement recess 30 is formed.

Further, as shown in FIG. 5, a limit switch 31 is provided behind the operating lever 28 on the inner wall of the machine base 1, and when the operating lever 28 is in the upright state, it is pressed by the rear surface and turns on. The lock member 32 shown in FIGS. 6 to 8 is actuated.

As shown in FIG. 6, the locking members 32 are disposed on both sides of the support section 33 at the front of the machine base 1, and are attached to the machine base 1 via mounting brackets M as shown in FIG. An air cylinder 34 and a link portion 3 interlocking with a piston rod 35 of the air cylinder 34
It consists of 6.

That is, the air cylinder 34 is connected with a supply tube 38a that supplies compressed air from a compressor (not shown) and an exhaust tube 38b that discharges compressed air from the air cylinder 34 into the atmosphere. A proximal end of a piston rod 35 is connected to a piston (not shown). Then, depending on the ON and OFF states of the limit switch 31, the supply tube 38a and the exhaust tube 38b respectively supply and exhaust compressed air to the air cylinder 34, thereby causing the piston rod 35 to reciprocate. Connect piston rod 35 to air cylinder 3
It is designed to appear and disappear a certain amount from the tip of 4.

To explain the link portion 36 of the lock member 32, one end portion of a plate-shaped intermediate piece 40 is rotatably attached to the upper mounting protrusion 39 of the mounting bracket M.
At the same time, one end of a connecting piece 41 is rotatably attached to a shaft B to the other end of the mediating piece 40. In addition, both the upper and lower mounting pieces 39, 4 of the mounting bracket M
2, one end of a rotating piece 43 formed by doubling a vertically long plate is rotatably attached to a shaft C.
Furthermore, a mediating piece 40 is provided at the center of this rotating piece 43.
The other end of the connecting piece 41 attached to is rotatably attached to a shaft D. A mounting portion 44 is formed at the tip of the rotating piece 43 by separating the overlapping portions of the plates from each other.
A threaded holding rod 47 is attached to the holding rod 4 through nuts 45 and 46 so that its length can be adjusted.

The link portion 36 has a mediating piece 40 and a connecting piece 41.
The shaft B of the air cylinder 34 is connected to the tip of the piston rod 35 of the air cylinder 34, and in conjunction with the piston rod 35, the mediating piece 40, the connecting piece 41, and the rotating piece 43 are rotated in a chain.
5 is in the protruding position, the holding rod 47 is rotated in the direction of arrow O.

Next, the numbering device d as a reprinting device disposed adjacent to the machine stand 1 will be described with reference to FIGS. 9 to 11.

A support 49 is vertically installed adjacent to the machine stand 1 of the sheet-fed rotary printing press, and a pair of upper and lower reprint units 50 and 51 are attached to the support 49. To explain the upper reprinting unit 50, the support 49
A rectangular cylindrical lifting case U is mounted on the top of the support column 4.
The lifting case U is mounted so as to be movable up and down along the guide rail R of 9, and a cylindrical bearing member 52 is attached to the front surface of the lifting case U.

In addition, a numbering member 5 as a printing member
3 is attached to a bearing member 52 from below via a crank-shaped arm 54, and is suspended and held so as to be rotatable within a certain angle in the horizontal direction about this attachment point.

As shown in FIG. 11, a motor 55 is attached to the lower rear surface of the support column 49, and a rotation screw 56 is formed by cutting a screw into the motor shaft. The rotary screw 56 is screwed into a nut portion 57a in a connecting cylinder 57 that is connected and fixed to the lifting case U. Furthermore, a pair of rollers 58 are provided at the front of the inner wall of the lifting case U so as to contact both the front and rear surfaces of the support column 49.

Next, referring to FIGS. 9 and 10, the lower reprinting unit 51 will be described. A cylindrical bearing member 6 is attached to the mounting bracket 59 fixed to the lower front surface of the column 49.
0 is provided, and a numbering member 61 as a printing member is held within the bearing member 60 via an arm 62 so as to be rotatable by a certain amount in the horizontal direction.

Further, the numbering members 53 and 61 provided in the upper and lower reprinting units 50 and 51, respectively, will be briefly described. In addition, both number ring members 5
3 and 61 have exactly the same configuration, here, the numbering member 6 of the lower reprinting unit 51
I will only discuss 1.

As shown in FIGS. 12 and 13, the number ring member 61 includes seven ring-shaped number ring bands 63 and
A number plate 65 consisting of an engaging pin 64 connected to the inner circumferential surface of the number plate 65 is fixed to a rotary disk 66, and a cam 67 is disposed below the number plate 65.
In this configuration, the number device 65 rotates as the rotary disk 66 rotates, and each time the engagement pin 64 slides on the cam surface of the cam 67, the number is displayed. ring band 63
The seven-digit number indicated by increases by one to display a consecutive number.

As shown in FIG. 3, a disk 69 having approximately the same diameter as the outer diameter of the gear 68 is fixed to the inner surface of a gear 68 attached to one end coaxially with the number plate 65.
A positioning recess 70 is formed in a part of 9 in the circumferential direction. Further, as shown in FIG. 14, a triangular mark 71 is provided on the gear 68, and the mark 71 and the positioning recess 70 of the disc 69 are set so as to be oriented in opposite directions. At the position where the mark 71 of the gear 68 points rearward, rotation is prevented by the stopper ST made of Bakelite, so that the positioning recess 70 is always held in a position facing forward.

Note that since the stopper ST is pressed forward by a biasing means such as a spring (not shown), it normally bites into the tooth groove of the gear 68 and prevents the gear 68 from rotating. When this gear 68 meshes with the gear 17 on the impression cylinder 4 side, the stopper ST is pushed back against the spring force by a fixing piece (not shown) attached to the machine base 1. Since the gear 68 is disengaged from the tooth space, the gear 68 becomes rotatable.

The positioning recess 70 of the disk 69 of the lower reprinting unit 51 and the positioning piece 18 of the impression cylinder 4 constitute a starting position fixing means, and the impression cylinder 4 and the numberer 65 are fixed to the printing paper by numbering. This is to fix the ring at the optimal position to start printing.

Further, as shown in FIG. 4, a pressing shaft 74 projects from the rear of the gear 68 in the opposite direction to the number plate 65 side, and a thin mounting piece 75 is located between the two mounting pieces 75 that project forward at the end of the pressing shaft 74. A rod-shaped abutment bar 76 is spanned. Note that the contact bar 76 rotates when the numbering member 61 is rotated toward the machine base 1.
It is in a position to engage within the engagement recess 30 of the actuation lever 28 .

As shown in FIGS. 7 and 8, both support parts 3 of the machine base 1
A thick plate-shaped holding fitting 78 is fixed to a position adjacent to the locking member 32 of No. 3, and an angled horizontally elongated locking plate 79 is attached to the frame 77 of the numbering member 61 at a position corresponding to the holding fitting 78. is installed. This lock plate 79 is
When the number ring member 61 is rotated and attached to the machine base 1, it comes into contact with the holding metal fitting 78 of the machine base 1, and when the holding rod 47 is further rotated to the lock position by the chain rotation of the link part 36. , the holding rod 47 is in a positional relationship such that it abuts and locks against the lock plate 79.

In addition, as shown in FIGS. 9 and 10, the support 4
A first sensor 72 for detecting the raised position and rotational position of the upper reprinting unit 50 is provided at the upper end of the column 9, and a second sensor 73 for detecting the rotational position of the lower reprinting unit 51 is provided at the lower part of the column 49. It is being Note that these sensors 72 and 73 are activated when an operation button (not shown) is pressed when lowering the upper reprint unit 50, and both the upper and lower reprint units 50 and 51 are activated.
After confirming that the motor 55 is in a position where it will not interfere, a signal is issued to start the motor 55.

Now, the operation of the locking mechanism in the numbering device constructed as described above will be explained below.

FIG. 9 shows a state in which the lower reprinting unit 51 has started numbering. To perform this numbering, the numbering member 61 of the lower additional printing unit 51 is rotated and attached to the machine base 1. As mentioned above, the positioning piece 18 of the impression cylinder 4
is oriented rearward, and the positioning recess 70 of the disc 69 of the lower reprint unit 51 is oriented rearward, so the positioning piece 18 of the impression cylinder 4 fits into the positioning recess 70 of the lower reprint unit 51. . Therefore, both gears 17 and 68 mesh at a predetermined meshing start position, and the numberer 65 comes into contact with the printing start position of the printing paper P wound on the impression cylinder 4.

Now, when the numbering member 61 of the additional printing unit 51 is rotated and attached to the machine base 1, the 14th
As shown in the figure, the pressing shaft 74 moves in the direction of the operating lever 28 of the machine base 1, and the abutment bar 76 enters the engagement recess 30 and presses the operating lever 28 rearward. Then, the operating lever 28 rotates backward about the fulcrum against the tension of the spring 29, and is held upright while pressing the limit switch 31 with its rear end. The operating switch that operates the numbering member 61 of the reprinting unit 51 also switches ON and OFF a solenoid (not shown) that controls the operation of the press shaft 74. Therefore, when the numbering member 61 is in the mounting position, the pressing shaft 74 is held in the operating position by the action of the solenoid, and the limit switch 31 is always kept in the ON state.

When the limit switch 31 is turned on, compressed air from the compressor is sent into the air cylinder 34 of the lock member 32 through the supply tube 38a. Then, the piston rod 35 of the air cylinder 34 begins to move from the retracted position shown in FIG.
is pressed in the opposite direction to the air cylinder 34. Therefore, the mediating piece 40 rotates clockwise about the axis A, and along with this, the connecting piece 41 also rotates clockwise about the axis A, and the rotating piece 43 is rotated clockwise by the axis D. Press in the direction.

When the rotating piece 43 is pressed by the connecting piece 41, it rotates clockwise about the axis C as a fulcrum, but the connecting piece 41 connected to the rotating piece 43 rotates about the axis A as a fulcrum as described above. move. Therefore, a difference of A to C occurs between the rotation radius A to D of the connecting piece 41 and the rotation radius C to D of the rotation piece 43. Therefore, when the piston rod 35 presses the shaft B, the rotation angle of the rotation piece 43 having a short rotation radius becomes larger than that of the connecting piece 41. In order to compensate for this difference in rotation amount, the connecting piece 4
1 rotates clockwise with respect to the intermediate piece 40 about the shaft B as a fulcrum. Therefore, the rotating piece 43 is the connecting piece 41
is again pressed clockwise, and rotated to a position perpendicular to the machine base 1, as shown in FIG.

When the rotating piece 43 of the locking member 32 rotates, the holding rod 47 attached to its tip also rotates clockwise to press and lock the locking plate 79 of the numbering member 61. 1 unit
The lock member 32 is attached to the lock plate 79 on both sides of the
In order to lock the numbering member 61, the numbering member 61 is securely locked to the machine base 1.

Thereafter, the printing press is operated and the printing paper P is continuously fed from the paper supply device 12 into the machine stand 1.
Since the number device 65 of the lower reprint unit 51 is supplied with ink by an inking device (not shown), when the printing paper P reaches the impression cylinder 4 in the machine stand 1, consecutive numbers are printed. .

As described above, while the lower reprinting unit 51 is performing numbering printing, the operator sets the numbering device 65 of the upper reprinting unit 50 in advance, and the numbering printing by the lower reprinting unit 51 is performed. When the printing is finished, the operations of the machine 1 and the lower reprinting unit 51 are stopped. After that, by operating a switch (not shown), the exhaust tube 38
Compressed air is exhausted from the air cylinder 34 to the atmosphere via b. Therefore, as the piston inside the air cylinder 34 moves, the piston rod 35 moves to the retracted position. Therefore, the link portion 36
The intermediate piece 40, the connecting piece 41, and the rotating piece 43 rotate in a chain, and the holding rod 47 moves in the opposite direction of the arrow.
The number ring member 61 is separated from the lock plate 79.

When the piston rod 35 of the lock member 32 is disengaged from the lock plate 79 of the number ring member 61, the engagement between the gear 68 of the number ring member 61 and the gear 17 of the impression cylinder 4 is released. After this, the arm 54 of the upper reprinting unit 50 held above the column 49 is manually rotated toward the machine base 1, and then the arm 62 of the lower reprinting unit 51 is moved from the machine base 1. The numbering member 61 is moved to a non-operating position by rotating in the direction of separation.

As described above, after the numbering member 61 of the lower reprinting unit 51 has been moved to the non-operating position, the operation button is pressed to lower the numbering member 53 of the upper reprinting unit 50. Then, the second sensor 73 is activated to detect that the numbering member 53 of the lower reprinting unit 51 is in the non-operating position, and the first sensor 72 is activated to detect that the numbering member 53 of the upper reprinting unit 50 is in the non-operating position.
detects that it is in the raised position and in the operating position,
The motor 55 is activated.

As the motor 55 rotates, the rotating screw 56
rotates while being screwed into the nut portion 57a of the lifting case U. The nut portion 57a is connected to the lifting case U.
Since the elevating case U is fixed to the support column 49,
, and the numbering member 53 also moves to the lower operating position. Thereafter, it is attached to the machine base 1 in the same manner as the numbering member 61 of the lower reprinting unit 51 described above, and is locked and numbering printing is performed.

In this reprinting device, the positioning piece 18 on the impression cylinder 4 side
is engaged in the positioning recess 70 of the disc 69 of the reprinting units 50, 51, so that the gear 17 on the impression cylinder 4 side and the gear 68 of the reprinting units 50, 51 are engaged at a predetermined meshing start position, The number device 65 is brought into contact with the printing start position of the printing paper P wound on the impression cylinder 4.
Therefore, numbering will not be printed at the wrong position on the printing paper P.

In addition, either the upper or lower reprint unit 50, 51
By attaching the number ring members 53, 61 to the machine base 1 and operating the switch, the lock member 32 reliably locks the number ring members 53, 61.
does not separate from the machine 1, and additional printing can be performed in a safe state.

Furthermore, when the reprinting units 50, 51 are not in use, the positioning recesses 70 of the discs 69 of the numbering members 53, 61 always face toward the machine base 1 side. Further, when the printing press is stopped, the positioning piece 18 of the impression cylinder 4 faces rearward. Therefore, the numbering member 5 of the additional printing units 50, 51
3 and 61, the positioning piece 1 of the impression cylinder 4
8 naturally engages in the positioning recess 70 of the numbering members 53, 61. In this way, the impression cylinder 4
The alignment of the gear 17 and the gear 68 of the number indicator 65 is extremely easy.

It should be noted that the present invention is not limited to the above-described embodiments; for example, the stop position determining device 20 may be attached to the plate cylinder 2 or the blank cylinder 3 other than the impression cylinder 4. Even with this configuration, the plate cylinder 2
Since the blank cylinder 3 is interlocked with the impression cylinder 4, the stopping motion of the plate cylinder 2 and the blank cylinder 3 is transmitted to the impression cylinder 4, and the impression cylinder 4 is stopped at a predetermined stop position.

Effects of the Invention As detailed above, the present invention connects a link part that rotates in a chain according to the movement of the piston rod of an air cylinder, which is operated by a limit switch provided in a part of the machine base, to the tip of the piston rod. Furthermore, the reprinting unit attached to the machine base is provided with a locking plate that abuts and locks the tip of the holding rod attached to the link when it rotates. There is no need to manually lock the machine base, and the additional printing unit can be easily attached to the machine base, resulting in an excellent effect that no labor is required.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing a sheet-fed rotary printing press, Fig. 2a is a front view showing the plate cylinder, Fig. 2b is an enlarged sectional view of the impression cylinder, and Fig. 2c is the stop position determining device. An enlarged side view, FIG. 3 is an exploded perspective view showing the assembled state of the gear at the end of the impression cylinder and the number dial, FIG. 4 is an enlarged front view of the main part of FIG. 1, and FIG. 5 shows the operating lever. 6 is a plan view showing the reprinting device attached to the machine base, FIG. 7 is an enlarged perspective view showing the locking member in the unlocked state, and FIG. 8 is a plan view showing the locking member in the locked state. Plan view shown, No. 9, 1
Fig. 0 is a front view showing the operating state of the reprinting device, Fig. 11 is a sectional view showing the state inside the elevating case, Figs. 12 and 13 are front and side views showing the number plate, respectively, and Fig. 14 is a FIG. 6 is a perspective view showing the positional relationship between the actuating lever and the pressing shaft at the end of the impression cylinder and the number plate. Machine base...1, limit switch...31, air cylinder...34, piston rod...32, link section...36, holding rod...47, upper reprint unit...50, lower reprint unit...51,
Lock plate...79.

Claims (1)

[Claims] 1. Limit switch 31 provided on a part of machine base 1
A link part 36 is connected to the tip of the piston rod 35 of the air cylinder 34 which is operated by the piston rod 35, and a link part 36 that rotates in a chain according to the movement of the piston rod 35 is connected to the top end of the piston rod 35. An additional feature of a sheet-fed rotary printing press characterized in that a locking plate 79 is provided on which the tip of the holding rod 47 attached to the link portion 36 is abutted and locked when the holding rod 47 rotates. Lock mechanism of printing device. 2. The limit switch 31 is operated by an operating lever 28 rotatably provided on a part of the machine base 1.
A locking mechanism of a reprinting device in a sheet-fed rotary printing press described in 2.