JPH02277639A - Form plate fastener of sheet-feed press - Google Patents

Abstract

PURPOSE:To enable plate fastening operation to be easily performed without reducing an operation rate of a printing machine by a method wherein a power transmission gear which is provided to a rotary shaft of a plate cylinder by being engaged therewith and is engaged with a rear side gear to make a rear side cam shaft pivot, is established. CONSTITUTION:One end 19a of a plate cylinder 2 is moved to a position capable of being inserted between engaged side upper and lower gears 21, 20 by making the plate cylinder 2 pivot to be inserted thereinto. A power transmission gear 16 is rotated in one direction to operate an engaging side gear 10. This operation rotates an engaging side cam shaft 6 in one direction via a coupling 8, and the engaging side upper gear 21 is moved to the lower gear 20 to fasten one end 19a of the plate by engagement. Then, the other end 19b of the plate is moved to a position easy to be inserted between rear side upper and lower gears 26, 25 by making the plate cylinder 2 pivot to be inserted. A rear side cam 7 is rotated in one direction via a coupling 9 by operating a rear side gear 11 with the gear 16, and the rear side upper gear 26 is moved to the lower gear side 25 to fasten the other end 19b of the plate by engagement.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a plate tightening device for a sheet-fed printing press. In this case, it is necessary to replace the plate attached to the plate cylinder. This plate exchange is often done manually in conventional sheet-fed printing presses, and the manual process of plate exchange will be explained with reference to FIGS. 1) to 14.

Figure 1) shows a plan view of a manual plate tightening device of a conventional sheet-fed printing press, and this plate tightening device l' is housed in a recess 3 provided in the axial direction of the plate cylinder 2.

This plate tightening device 1 is a plate tightening device l
The main components are a side plate tightening part 4, a bottom plate tightening part 5, and a plate tensioning part 12 for tensioning the plate 19 attached to the plate cylinder 2. The occlusal side plate tightening part 4 is connected to the occlusal side lower teeth 20 and the occlusal side
There is an upper side tooth 21 (the biting side stop 21 is divided into four parts), and a resilient spring 22 and the biting side camshaft 6 are inserted between them. These lower and upper teeth 20 and 21 on the biting side and the biting side camshaft 6 are assembled with a spherical bolt 23,
Further, a fine adjustment bolt 24 is provided on the lower teeth 20 on the occlusal side.

In addition, the buttock side plate tightening part 5 has the buttock side lower teeth 25 and the buttside upper teeth 26 (
The upper rear teeth 26 are divided into four parts, and the elastic spring 27 and the rear camshaft 7 are inserted between them. These lower butt teeth 25 and upper teeth 25 and 26 and the butt camshaft 7 are assembled with a spherical bolt 28, and a fine adjustment bolt 29 is provided on the lower butt tooth 25.

Furthermore, the bottom side lower tooth 25 of the bottom side plate tightening part 5 and the groove part 3 of the plate cylinder 2
A printing cam shaft 13 is provided between the lower teeth 20 on the biting side and the lower teeth 25 on the butt side. Therefore, the tip of the fine adjustment bolt 29 mentioned above comes into contact with the printing camshaft 13.

The plate 19 is attached and removed using the conventional manual plate tightening device L' configured as described above.

As shown in FIGS. 12 and 13, a tool hook 32 provided at the axial center of the engaging side camshaft 6 and a tool hook 33 of the butt side camshaft 7 are provided with a tool (not shown). ), and manually rotate the bite and butt side cam shafts 6 and 7.

Further, printing is carried out by hanging a tool (not shown) on a tool hook 34 provided at the end of the printing camshaft 13 and rotating the printing camshaft 13 by manual operation.

To explain the installation of the plate 19 in detail, first, the plate clamping device l' is brought into the state shown in FIG. 12. In other words, the tool hanging parts 32 and 3
3 with a tool and turn the notches 6a and 7a of the camshafts 6 and 7 upward, respectively, so that the camshafts 6 and 7 are turned upward using the spherical bolts 23 and 28 as fulcrums, and the elastic springs 22 and 27 are used to rotate the camshafts 6 and 7 upward. The tips of the butt-side upper teeth 21 and 26 are raised upward and opened.

Furthermore, when a tool is hung on the tool hanging part 34 and the notch 13a of the printing cam shaft 13 is directed toward the tip of the fine adjustment bolt 29, the spring 31 causes the tip of the fine adjustment bolt 29 to be attached to the printing cam. Since it is pressed against the shaft 13, the bottom plate clamping part 5 is shifted to the left side (see FIG. 12).

Next, set the plate 19 to the position where it is easy to attach the plate 19 to the plate tightening part 4 on the side λ side.
1 Rotate the plate cylinder 2, insert one end 19a of the plate 19 between the lower teeth 20 on the bite side and the upper teeth 21 on the bite side, and manually rotate the bite side cam shaft 6 clockwise. Then, close the bite side stop m21 and give up on the plate 19 (1) 9a.

Furthermore, when the clamping of the plate 19 by the gripping side plate tightening part 4 is completed, the plate cylinder 2 is rotated to a position where it is easy to attach the plate 19 to the bottom side plate clamping part 5 while keeping the plate 19 in close contact with the surface of the plate cylinder 2. The plate 19 is moved between the buttock lower teeth 25 and the buttock upper teeth 26.
Insert the other end 19b, manually rotate the rear camshaft 7 counterclockwise to close the rear upper teeth 26, and remove the other end 1 of the plate 19.
Tighten 9b (see Figure 13).

After the both ends 19a and 19b of the plate 19 have been tightened to the gripping and bottom side plate tightening parts 4 and 5, the plate tensioning cam shaft 13 is manually rotated counterclockwise, so that the bottom side plate tightening part 5 is moved to the side shown in FIG. 14 to bring the plate 19 into close contact with the surface of the plate cylinder 2, completing the attachment of the plate 19 to the plate cylinder 2 (see FIG. 14).

The plate 19 can be removed by performing the above-described installation of the plate 19 in the reverse order.

As described above, since the plate 19 is replaced manually, it takes a long time, especially in multi-color machines, and the operating rate of the sheet-fed printing machine cannot be improved.

In addition, during plate replacement work, plate clamping and plate tensioning (bringing the plate into close contact with the outer circumferential surface of the plate cylinder) are performed in a narrow space using tools, which can be dangerous due to poor working posture. there were. As a solution to these inconveniences, the
-167051, (1) Japanese Unexamined Patent Publication No. 164539/1982, and (4) Japanese Utility Model Publication No. 47134/1987 are known.

[Problem to be solved by the invention]

However, in the conventional example (2) mentioned above, the printing work is simply done without any manual effort, and moreover,
Because the work position for plate tensioning is fixed depending on the position where the engaging element and the engaging element moving drive device are attached to the frame, it is difficult to perform plate tightening work at a position that is easy to perform. It is.

In the conventional example (2), the plate tightening work is simply carried out without the hassle of manpower, and the plate tensioning work relies on humans.Moreover, the installation of this automatic plate clamping device depends on the position. The work position for plate tightening is fixed, and when inserting one end 19a of the plate 19 between the lower teeth 20 and upper teeth 21 on the biting side, the plate 19 is inserted between the lower teeth 25 and the upper teeth 26 on the buttock side. other end 1
When inserting the plates 9b, it is difficult to freely adjust them to positions where the fifth plate tightening work can be easily performed.

In the conventional example (①), like the conventional example (③), the plate tightening work is simply performed without bothering human hands, and the plate tightening work relies on human labor.In addition, the installation of an automatic plate tightening device is Since the work position of the plate tightening is fixed depending on the position, as described above, one end of the plate 19 and between the lower teeth 20 and upper teeth 21 on the biting side and between the lower teeth 25 and the upper teeth 26 on the buttock side are fixed. Other end 1
When inserting 9a and 19b, it is difficult to freely adjust the positions to facilitate plate tightening work.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a plate tightening device for a sheet-fed printing press that can easily perform plate tightening work with almost no labor and does not reduce the operating rate of the printing press.

In addition to the above object, another object of the present invention is to provide a plate clamping device for a sheet-fed printing press in which the plate clamping work position is not restricted.

Furthermore, in addition to the above objectives, plate printing work can be done easily without labor, and the operating rate of the printing press is not reduced.
To provide an automatic plate tightening device for a sheet-fed printing press in which the working position of plate binding is not restricted.

[Means for Solving the Problems 1] In order to solve the above problems, the plate tightening device of the sheet-fed printing press of the present invention rotates the gripping side camshaft within the recess provided in the plate cylinder. A bite side plate tightening part that bites or releases the plate with the bite side upper teeth and lower teeth, and a buttock that bites or releases the plate with the buttside upper teeth and lower teeth by rotating the buttside camshaft. With the side plate tightening part.

In the plate tightening device of a sheet-fed printing press, the plate tightening unit of the sheet-fed printing press is equipped with a plate tensioning unit that moves the bottom side plate tightening unit to the tension side or the loosening side by rotating a plate tension cam. A jaw and a tail gear connected via respective joints that freely transmit the rotation to the side cam shaft, and a jaw and tail gear that mesh with the jaw and tail gear and are provided on the rotating shaft of the plate cylinder. The camshaft also includes a power transmission gear that provides a predetermined operation to the jaw and tail side gear such as rotating the jaw and tail side camshaft. In addition, the power transmission gear becomes fixed to the rotating shaft of the plate cylinder when the torque is less than a predetermined torque.
Provided so that it can rotate freely by one turn when the torque exceeds a predetermined torque,
It is preferable that the power transmission gear is provided with a drive unit that applies a predetermined torque or more to the power transmission gear to rotate it to a predetermined position.

Furthermore, a printing gear is provided to transmit rotation to the printing camshaft of the printing section, and the printing gear is operated in a predetermined manner by the power transmission gear to rotate the printing camshaft, thereby tightening the bottom side printing section. This is to move the plate to the tight side or to the loose side.

[Function 1] According to the above configuration, the plate cylinder is rotated to a position where one end of the plate can be inserted between the biting side retaining teeth and the lower teeth, and the plate is inserted between the biting side retaining teeth and the lower teeth. Insert one end and rotate the power transmission gear to one side to operate the biting side gear, and this operation rotates the biting side camshaft to one side via the joint, causing the biting side retainer to move toward the lower teeth. 1st, rotate the plate cylinder in this state and wrap the plate around the plate cylinder.

Furthermore, the plate cylinder is rotated to a position where the other end of the plate can be easily inserted between the upper and lower teeth on the butt side, and the other end of the plate is inserted between these, and the power transmission gear is connected to the butt side gear. This action causes the butt side camshaft to rotate in one direction via the joint, and the butt side upper teeth move to the lower m side, gripping the other end of the plate and tightening the plate attached to the 0 plate cylinder. To remove.

The above operations can be performed in reverse.

In addition, when one end of the plate is inserted between the bite-side retaining tooth and the lower tooth and the drive unit is rotated in one direction, a torque greater than the predetermined torque is transmitted to the power transmission gear, so only the power transmission gear rotates in one direction. Then, the power transmission gear operates the bite-side gear, and this operation rotates the bite-side camshaft in one direction via the joint, causing the bite-side retainer to move toward the lower teeth and move one end of the plate. When the drive unit is stopped, the 0th position can be tightened.
The power transmission gear becomes a torque less than a predetermined torque and becomes fixed to the rotating shaft of the plate cylinder, and the plate cylinder is rotated in this state to wrap the plate around the plate cylinder. Furthermore, the plate cylinder is rotated to a position where the other end of the plate can be easily inserted between the butt side upper and lower teeth, the other end of the plate is inserted between these, and the drive unit is rotated in one direction. Since a torque equal to or greater than a predetermined torque is transmitted to the power transmission gear, only the power transmission gear rotates in one direction, thereby operating the rear gear. This movement is transmitted to the butt-side camshaft via the joint, causing the butt-side camshaft to rotate in one direction, causing the buttside upper teeth to move toward the lower teeth and tightening by biting the other end of the plate. To remove the plate attached to the plate cylinder, simply perform the above steps in reverse.

Furthermore, after tightening both ends of the plate with the gripping and bottom side tightening parts, when the drive unit is further rotated in one direction, the plate tensioning gear is operated by the power transmission gear, and this operation causes the plate tensioning camshaft to be moved in one direction. Rotate to move the bottom copperplate tightening part to the tension side of the plate.

To loosen the plate, just reverse the steps above.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 1O.

Fig. 1 is a perspective view of a plate tightening device of a sheet-fed printing press according to the present invention, Fig. 2 is a sectional view taken along line II-II in Fig. 3, and Fig. 3 is a sectional view taken along line III-III in Fig. 2. 4 is a sectional view taken along line I'V-rV in FIG. The tightening device l includes a grip installed in a recess 3 provided in the first plate cylinder 2 and bottom side plate tightening parts 4 and 5.
joints 8 and 9 that freely transmit rotation to the grip and rear side plate tightening shafts 6 and 7, respectively, and the grip and rear side gears lO and 1) connected to these joints 8 and 9, respectively; Recess 3
A printing gear 14 is connected to the printing camshaft 13 of the printing unit (see Fig. 12) attached to the printing plate camshaft 12 and transmits rotation, and a printing gear 14 is fixed to the rotating shaft 15 of the plate cylinder 2 when the torque is below a predetermined torque. A gear with a plate barrel (power transmission gear) 16 is provided so as to be rotatable when the torque exceeds a predetermined torque. A section 1) 7a and B section teeth 17b that provide the printing gear 14 with a predetermined operation of rotating the bite and bottom side camshafts 6 and 7 and the printing camshaft 13, respectively;
It consists of a drive section 18 that applies a torque equal to or greater than a predetermined torque to the plate cylinder gear 16 to rotate it to a predetermined position.

The above-mentioned bite and bottom side plate tightening parts 4 and 5 and plate tensioning part 12
Since it is the same as the conventional example, detailed explanation thereof will be omitted.

The joints 8 and 9 are A joints 8a and 9 that are inserted into holes 6a and 7a machined at one end of the bite-side camshaft and the butt-side camshaft 6 and 7, and fixed with tapered pins 35 and 36.
a, the concave portion at one end is slidably inserted in the convex portion of the A joints 8a and 9a in the horizontal direction, and the intermediate portion is rotatably inserted in the hole of the plate cylinder 2, and further, It consists of B joints 8b and 9b, each of which has a barb and tail side gears 10 and 1) fixed to the other end with taper pins 39 and 40.

The plate tensioning camshaft 13 has its end protruding from the side surface of the plate cylinder 2, and the plate tensioning gear 14 is connected to the tapered bin 4 at the end thereof.
2 is fixedly attached.

The plate cylinder gear 16 is rotatably attached to the rotating shaft 15 of the plate cylinder 2, and is provided with an upper ring 43 so as not to move on the rotating shaft 15 in the axial direction.

There are three engaging holes 16a at predetermined intervals on the side surface of the plate cylinder gear 16. These engagement holes 1
A ball 46 fitted into the tip of a ball plunger 44 and biased by an elastic spring 45 engages with the ball 6a. This ball plunger 44 is attached to the tip of a bracket 47 attached to the side surface of the plate cylinder 2 with a bolt, by means of a nut 1-. Therefore, when the torque of the plate cylinder gear 16 is below a predetermined value, the ball 46 of the ball plunger 44 is engaged with the engagement hole 16a, and the first plate cylinder gear 16 is rotated together with the rotating shaft 15 of the plate cylinder 2. When the torque of the gear 16 with the 1st plate barrel that rotates exceeds a predetermined value, the ball 46 of the ball plunger 44 comes off from the engagement hole 16a against the spring force of the elastic spring 45. A gear 16 with a plate cylinder rotates on a rotating shaft 15 of the plate cylinder 2.

The A section surface 17a and the B section surface 17b are connected to the gear 1 with plate cylinder.
It is provided on the circumferential surface of 6. The A part surface 17a includes the above-mentioned bite and butt sides and the printing gears 10 and 1) and 14.
It operates. The B portion surface 17b rotates the gear 16 with the plate cylinder on the rotating shaft 15 of the plate cylinder 2. That is, in FIG. 2(a), the intermediate plate barrel gear 16 rotates counterclockwise, and the A section surface 17a rotates the gripping side camshaft 6 clockwise via the gripping side gear 10, thereby forming the notch. When the part 6a is placed in the position shown in FIG.
1 becomes closed. Similarly, the plate cylinder gear 16 rotates counterclockwise, and the A section 1fl17a moves the bottom camshaft 7 and the printing camshaft 13 clockwise via the bottom gear 1) and the printing plate tensioning gear 14. Rotate the notch 7
When a and 13a are placed in the positions shown in FIG. 2(c), the buttside upper teeth 26 are closed and the buttside plate tightening device 5 is moved to the right, that is, the plate 19 is tensioned.

Then, from the above-mentioned state, the plate cylinder gear 16 rotates clockwise, and the A section surface 17a rotates the plate tensioning camshaft 13 counterclockwise via the plate tensioning gear 14, thereby opening the cutout portion 13a. When placed in the position shown in FIG. 2(B), the bottom plate tightening device 5 is in a state closer to the left side, that is, the plate 19 is in a loosened state. Similarly, the gear 16 with the plate cylinder rotates one clockwise direction, and the part A (i17a connects the rear camshaft 7 and the gripping side camshaft 6 to the rear gear 1) and the gripping side gear 1.
0 in the counterclockwise direction to remove the notches 7a and 6.
When a is placed in the position shown in FIG. 2(b), the butt side upper tooth 26 and the biting side retainer tooth 21 are in an open state.The drive section 18 has an intermediate gear 49, and this intermediate gear 49 It is arranged so as to mesh with the plate cylinder gear 16. This intermediate gear 49 has a washer 50 and a bolt 51 on one main body frame F.
It is attached via a ball bearing 53 to a bottle 52 which is fixed by a. This intermediate gear 49 meshes with a gear with a clutch 54, and the gear with a clutch 54 is fixed to a clutch shaft 56 of a clutch 55 with a key 57. This clutch 55 is constructed integrally with a brake 58 , and a brake gear 60 is fixed to a brake shaft 59 of this brake 58 with a key 61 . Further, the motor gear 62 is arranged to mesh with the brake gear 60 and is fixed to the motor shaft 54 of the motor 63 with a key 65.

Note that 66 is a bearing that supports the rotating shaft 15 of the plate cylinder 2;
It is firmly fixed to the main body frame F with bolts 67.

Next, the operation of the plate tightening device 1 of the sheet-fed printing press having the above configuration will be described in detail.

First, FIG. 5(A) shows the preparation complete state, that is, the biting side retaining teeth 21 and the buttock side upper teeth 26 are open, and the buttside plate tightening part 5 is opened.
moves toward the plate tensioning camshaft 13 side of the concave portion 3 of the plate cylinder 2, the motor 63 stops, the brake 58 operates, the clutch 55 opens, and the ball 46 of the ball joint 44 moves into the engagement hole 16a of the plate cylinder gear 16. This shows the state in which it is engaged. Switch for installing the 1st version in this state (not shown)
is activated, the plate cylinder 2 is rotated to a position where the plate 19 can be easily attached to the clamping side plate clamping part 4, that is, the position shown in FIG. 5(a), and then stopped.

Next, the position of the plate cylinder 2 in FIG. 6(a) is the same as in FIG. 5(a). When one end 19a of the plate 19 is inserted between the upper teeth 21 and 20 of the upper biting steel, the brake 58 is released by a switch (not shown), the clutch 55 is activated, and the motor 63 is activated. , gear with motor 62, gear with brake 60, gear with clutch 54
, the rotation is transmitted to the plate cylinder gear 16 via the intermediate gear 49.

The torque of the plate cylinder gear 16 disengages the ball 46 of the ball joint 44 from the engagement hole 16a of the plate cylinder gear 16 and releases the engagement state (the plate cylinder 2 and the plate cylinder gear 16 are integrated). ), the plate cylinder gear 16 rotates counterclockwise. That is, the plate cylinder gear 16 is as shown in FIG.
The rotation starts from the position (the plate cylinder 2 is stopped), and the A part surface 17a meshes with the engaging side gear 10, and the engaging side gear 10 is rotated clockwise (the engaging side camshaft 6 (also rotates clockwise at the same time), and the gripping side camshaft 6
When the notch 6a is placed in the position shown in FIG. 6(b), the upper teeth 21 of the clamping steel close and tighten one end 19a of the plate 19. At the same time, when the plate cylinder gear 16 is in the position shown in Fig. 6 (b),
A detection device (not shown), for example, a tachometer meshed with the motor gear 62 attached to the motor shaft 64 is activated, the clutch 55 is opened, and the ball 4 of the ball joint 44 is activated.
6 engages with the engagement hole 16a of the gear 16 with the plate cylinder 2.
The motor 63 stops, the brake 58 operates, and the plate cylinder gear 16 becomes one body.
It stops at the position shown in FIG. 6(b), and the step of attaching the plate 19 to the gripping side plate clamping part 4 is completed when the plate cylinder 2 and the blanket cylinder 68 come into contact (printing state).

FIG. 7(a) shows the plate cylinder 2 being brought into contact with the blanket cylinder 68 (printing state), and the plate cylinder 68 being brought into close contact with the surface of the plate cylinder 2, from the position shown in FIG. 6(a). 2 (together with the plate cylinder gear 16) is rotated counterclockwise, and the bottom side plate clamping part 5 is stopped at a position where the plate 19 can be easily attached. At this time, since the plate cylinder 2 and the gear 16 with a plate cylinder rotate together, the A section 17a of the gear 16 with a plate cylinder
The relationship between this and the engaging side gear lO is the same as that shown in FIG. 6 (b) (see FIG. 7 (b)).

The position of the plate cylinder 2 in FIG. 8 (A) is the same as in FIG. state. At this time, the relationship between the A section surface 17a of the plate cylinder gear 16 and the gripping side gear 10 is the same as in FIG. 6(B) and FIG. 7(B) (see FIG. 8(B)). .

FIG. 9(A) shows that the plate cylinder 2 (including the plate cylinder attached gear 16) is rotated counterclockwise again from the position of the plate cylinder 2 in FIG. 8(A), and the point of contact with the blanket cylinder 68 is Butt side plate tightening part 5
The figure shows the state in which the plate 19 has been rotated until it is at a position close to (to bring the plate 19 into close contact with the surface of the plate cylinder 2). At this time as well, the relationship between the A part surface 17a of the plate cylinder gear 16 and the gripping side gear 10 is as shown in FIGS. 6(B), 7(B), and 8.
The position of the plate cylinder 2 in Figure 1O (A) is the same as in Figure 9 (B) (see Figure 9 (B)).
When the plate cylinder 2 is in this position, a detection device (not shown) is activated, the brake 58 is released, the clutch 55 is activated, the motor 63 is activated, and the motorized gear 62. The rotation is transmitted to the plate cylinder gear 16 through the brake gear 60, the clutch gear 54, and the intermediate gear 49. Due to the torque of this plate cylinder gear 16, the ball 46 of the ball joint 44
from the locking hole 16a of the plate cylinder gear 16 to release the engagement state (the plate cylinder 2 and the plate cylinder gear 16 are no longer integrated).
, the plate cylinder gear 16 rotates counterclockwise. That is, the plate cylinder gear 16 starts rotating from the position shown in FIG. 1) in the clockwise direction (the butt-side camshaft 7 also rotates clockwise at the same time), and when the notch 6a of the bite-side camshaft 6 is brought to the position shown in Fig. 1O (b), the butt-side camshaft 7 The upper side teeth 26 close and tighten the other end 19b of the plate 19, completing the process of attaching the plate 19 to the butt side plate tightening portion 5.

The plate cylinder gear 16 continues to rotate, and the A part surface 17a meshes with the plate tension gear 14, rotating the plate tension gear 14 clockwise (the plate tension camshaft 13 also rotates clockwise at the same time). The rotation continues with the notch L of the printing camshaft 13.
3a in the position shown in Fig. 1θ (c), the butt side plate tightening part 5
is moved to the center of the recess 3 of the plate cylinder 2, and the plate I9 is stretched.

Furthermore, the plate cylinder gear 16 continues to rotate as shown in Fig. 1O (d).
When the position is reached, a detection device (not shown) is activated, the clutch 55 is released, the ball 46 of the ball joint 44 engages with the engagement hole 16a of the plate cylinder gear 16, and the plate cylinder is attached. The gear 16 and the plate cylinder 2 are integrated, and the motor 63 is stopped.
When the brake 58 is activated, the plate cylinder gear 16 stops at the position shown in FIG.
are separated (printed state), and the attachment of the plate 19 to the plate cylinder 2 is completed.

Next, when removing the plate 19 from the plate cylinder 2, actuate the first plate removal switch (not shown), and the plate cylinder 2 will be
It rotates to the position shown in FIG. 8(a) and stops, and a detection device (not shown) is activated to release the brake 58 and clutch
5, the motor 63 is activated, and the motorized gear 6 is activated.
2. Rotation is transmitted to the plate cylinder gear 16 through the brake gear 60, the clutch gear 54, and the intermediate gear 49.The torque of the plate cylinder gear 16 causes the ball 46 of the ball joint 44 to move to the plate cylinder gear 16. The plate cylinder gear 16 is rotated one clockwise direction from the state shown in Fig. 1O (d). When the gear 16 with the first plate cylinder, which continues to rotate from the beginning (the plate cylinder 2 is stopped) to the position shown in Fig. 5 (B), reaches the position shown in Fig. 5 (C port), a detection device (not shown) is activated. When activated, the clutch 55 is released, and the ball 46 of the ball joint 44 engages the engagement hole 16 of the plate cylinder gear 16.
a (the plate cylinder 2 and the gear 16 with the plate cylinder become one body), the motor 63 stops, the brake 58 operates,
The plate cylinder gear 16 stops rotating.The plate cylinder gear 16 rotates clockwise from the position shown in Figure 1O (D) until it reaches the position shown in Figure 5 (D).
While reaching the position b), the A section 17a sequentially rotates the printing gear 14, the bottom and bite side gears 1), and IO counterclockwise, so that the notch 13a of the printing camshaft 13, The notch 7a of the bottom side camshaft 7 and the notch 6a of the bite side camshaft 6 are in the position shown in FIG. The plate 19 can be removed from the plate cylinder 2 by moving it to the side (loosening the plate 19), opening the butt side upper teeth 26, and further opening the biting side retaining teeth 21.

In this embodiment, the plate cylinder gear 16 is rotated to the plate cylinder 2 by a motor 63 that is separate from the motor (not shown) that rotates the first plate cylinder 2.
The A section surface 17a rotates the gripping side camshaft 6, the bottom side camshaft 7, and the printing camshaft 13 to perform plate tightening and printing. Therefore,
These operations are possible no matter where the plate cylinder 2 stops, and are not limited to the position of this embodiment.

In addition, the plate clamping device 1 for a sheet-fed printing press according to the present invention can easily improve the conventional plate clamping device 1°, and unlike the conventional device 1, the plate clamping device 1 for a sheet-fed printing press can be easily improved. and 7, and if the respective tool hooks 32, 33, and 34 are left on the plate tensioning camshaft 13, the A section 1 of the plate cylinder gear 16
When 7a is in the position shown in FIG. 5(B) and FIG. 1O(D), it is also possible to manually perform plate tightening and printing as in the conventional apparatus 1''.

〔Effect of the invention〕

As described in detail above, according to the plate tightening device of the sheet-fed printing press of the present invention, the plate cylinder is rotated to a position where one end of the plate can be inserted between the upper teeth and the lower teeth on the occlusal side. Insert one end of the plate between the retaining tooth on the retaining side and the lower tooth, rotate the power transmission gear to one side, and operate the engaging side gear. Rotate it, and the bite-side retaining teeth move to the lower teeth side to bite and tighten one end of the plate. 6. Next, keep rotating the plate cylinder in this state and wrap the plate around the plate cylinder. Furthermore, the plate cylinder is rotated to a position where the other end of the plate can be easily inserted between the upper and lower teeth on the butt side, and the other end of the plate is inserted between these, and the power transmission gear is connected to the butt side gear. This action rotates the butt-side camshaft in one direction via the joint, causing the butt-side upper teeth to move toward the lower teeth and bite the other end of the plate to tighten the plate attached to the 0-plate cylinder. To remove it, just do the above steps in reverse.

Therefore, since the plate tightening work hardly requires any manual effort, the work can be done easily and safely and in a short time, and the operating rate of the printing press can be increased.

In addition, when one end of the plate is inserted between the bite-side retaining tooth and the lower tooth and the drive unit is rotated in one direction, a torque exceeding a predetermined torque is transmitted to the power transmission gear, so only the power transmission gear is turned to one side. It rotates and operates the bite side gear by the power transmission gear. This movement is transmitted to the biting side camshaft via the joint, causing the biting side camshaft to rotate in one direction, so the biting side retainer moves to the lower tooth side and bites and tightens one end of the plate. Next, when the drive unit is stopped, the torque of the power transmission gear becomes lower than the predetermined torque and becomes fixed to the rotating shaft of the plate cylinder.The plate cylinder is rotated in this state and the plate is transferred to the second plate cylinder. Wrap around. Furthermore, the first plate cylinder is rotated to a position where the other end of the plate can be easily inserted between the upper and lower teeth on the butt side, the other end of the plate is inserted between these, and the drive unit is rotated in one direction. Since a torque equal to or greater than a predetermined torque is transmitted to the power transmission gear, only the power transmission gear rotates in one direction, and the rear gear is operated by the power transmission gear. This movement is transmitted to the butt-side camshaft via the joint, causing the butt-side camshaft to rotate in one direction, causing the buttside upper teeth to move toward the lower teeth and tightening by biting the other end of the plate. To remove the plate attached to the 0-plate cylinder, simply perform the above operations in reverse.

Therefore, in addition to the above-mentioned effects, the first plate tightening work requires almost no human effort, and moreover, the power transmission gear is rotated relative to the plate cylinder by a motor that is different from the motor that rotates the plate cylinder. Because the plate is tightened, the position of plate tightening is not restricted and the plate tightening work is easy.Furthermore, after tightening both ends of the plate with the grip and the butt side tightening part, the drive unit can be moved to one side. When the plate tensioning gear is rotated to 0, the power transmission gear operates the printing gear, and this operation rotates the printing camshaft in one direction and moves the bottom plate tightening part to the printing plate tension side.
To loosen the plate, just reverse the steps above.

Therefore, in addition to the above-mentioned effects, the plate tensioning work requires almost no manual effort (and, moreover, the power transmission gear is rotated relative to the plate cylinder by a motor separate from the motor that rotates the plate cylinder. Since stenciling is performed, the stenciling position is not restricted (and the stenciling work is easy).

[Brief explanation of drawings]

1 to 10 show embodiments of the present invention.
Figure (a) is a cross-sectional view taken along line II-II in Figure 3;
Figures (B) and (C) are enlarged cross-sectional views of the main parts of Figure 2 (A), Figure 3 is a cross-sectional view along line nl-III of Figure 2 (A),
Figure 4 (a) is a sectional view taken along the line IV (a) - ■ (a) in Figure 2, Figure 4 (b) is a sectional view showing the H section in Figure 4 (a), and Figure 5 10 to 10 are cross sections M showing an explanation of the operation of attaching a plate to a plate cylinder and performing plate tensioning. Figures 1) to 14 show conventional examples. Figure 1) is a plan view of a manual plate clamping device of a conventional sheet-fed printing press, and Figure 12 is A-A in Figure 1). It shows a cross section along the line, with the upper teeth on the buttocks open. Figure 14 is a cross-sectional view taken along line A-A in Figure 1) with the upper teeth on the buttocks closed and the plate tightened. FIG. 3 is a cross-sectional view of a state in which the tensioning cam shaft is rotated to tension the plate. l...--Plate clamping device of sheet-fed printing press 2--Plate cylinder 3--Concavity 4--Batch side plate clamping section 5--Butt Side plate tightening part 6...Bite side camshaft 7...Butt side camshaft 8.9...
...Joint 10...Batch side gear 1.1...Butt side gear 12...Printing section 13...Printing cam shaft 14. ...-Print tension gear 15...-Rotating shaft I6--Plate cylinder gear 18--Drive section 20--Lower teeth on the latitudinal side 25...・-Lower teeth on buttock side (power transmission gear) 19... Version 21...- Biting side retaining teeth 26...- Upper teeth on buttock side

Claims (3)

[Claims] (1) A bite-side plate tightening part that rotates the bite-side cam shaft to engage or release the plate with the bite-side upper and lower teeth, and a butt-side cam in a recess provided in the plate cylinder. A butt-side plate tightening part that rotates the shaft to engage or release the plate with the butt-side upper teeth and lower teeth, and a plate tensioning cam that rotates the butt-side plate tightening part to the tension side or loosen side. In the plate clamping device of a sheet-fed printing press, which is equipped with a plate tensioning unit that is moved by a plate clamping unit, the plate clamping unit is connected to the gripper and the rear cam shaft through respective joints that freely transmit the rotation, respectively. a jaw and tail side gear; and a camshaft that meshes with the jaw and tail gear, is provided on the rotating shaft of the plate cylinder, and causes the jaw and tail gear to rotate the jaw and tail side camshaft. A plate clamping device for a sheet-fed printing press, comprising a power transmission gear that provides a predetermined operation. (2) A power transmission gear is provided on the rotating shaft of the plate cylinder so that it becomes fixed when the torque is less than a predetermined torque and becomes freely rotatable when the torque is more than the predetermined torque, and a torque of the predetermined torque or more is applied to the power transmission gear. 2. The plate clamping device for a sheet-fed printing press according to claim 1, further comprising a drive unit for rotating the plate to a predetermined position. (3) A printing gear that transmits rotation to the printing camshaft of the printing section is provided, and the printing gear is operated in a predetermined manner by the power transmission gear to rotate the printing camshaft, and the bottom side printing tightening section Claim (1) to move the plate to the tension side or loosen side of the plate
) or plate clamping device for a sheet-fed printing press described in (2).