JPH065165Y2 - Plate clamping device for printing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a printing machine, and more particularly, to a clamp base that is slidable in a secant direction of a plate cylinder and a clamp that is undulatingly coupled to the clamp base. The present invention relates to a plate clamping device of a printing machine of a type in which a plate is provided in a plate cylinder groove, the plate end is bitten by undulating the clamp plate, and the plate is pulled by sliding a clamp base.

(Background of the Invention) In offset printing, a flexible metal plate, that is, a plate that has been subjected to a scientific treatment according to each of the image area and the non-image area is wrapped around the outer periphery of the plate cylinder, and ink and After the dampening water is delivered to the plate, it is transferred to the blanket cylinder, and the paper fed between the blanket cylinder and the impression cylinder is pressed to perform printing.

Therefore, the plate must be attached to a predetermined position designated by the plate punch system or the like in close contact with the equicircular portion of the plate cylinder without causing local distortion and with proper tension.

Therefore, in order to attach the plate to the plate cylinder, a plate clamp device is provided in the plate cylinder groove. Such a plate clamp device is required to hold the plate edge properly and to apply an appropriate tension to the entire plate in order to ensure good printing quality. In addition, since the plate changing time occupies a considerably large proportion in the print preparation, it must be excellent in operability and operability in order to reduce the plate mounting time.

The plate clamp device will be described with reference to FIG. 7. A plate cylinder groove (2) is formed in the axial direction (the direction perpendicular to the drawing) of the plate cylinder (1) rotating in the direction of the arrow. A balance weight (3) is provided in the center of the body groove (2), and a plate having almost the same shape on the bite source side (shown by reference symbol F) and the bite butt side (shown by reference symbol R) of the plate (4). Clamping devices are provided in pairs. Then, the plate (4) is bitten and pulled by these plate clamping devices, and is closely attached to the outer circumference of the equicircular portion (5) of the plate cylinder (1).

Of these plate clamp devices, the one on the bite side F is
Mainly plays a role of fixedly biting the plate edge, while
The one on the bite side R often plays a role of holding the plate end and pulling it to bring the plate (4) into close contact with the equicircular portion (5) of the plate cylinder (1). Therefore, the plate clamp device on the bite side R is slightly more complicated in structure, and will be examined below.

(Prior Art) As an example of the plate clamp device described above, the actual plate shovel 60-3
In the 2033 publication, the one shown in the sectional view of FIG. 8 is disclosed. That is, a push rod (7) having an advance position regulating stopper (6) is provided on the lower teeth (8) so as to be able to move forward, and a first spring (9) for applying tension to the plate (4) is provided with the push rod (7). A plate which is interposed between the tip of the blade and the lower tooth (8), and retracts the lower tooth (8) through the push rod (7) and the first spring (9) to give tension to the plate (4). The tension cam (10) is interposed between the push rod (7) and the side surface (11) of the notch formed in the plate cylinder, and the lower teeth (8) are advanced to loosen the plate (4). The spring (12) of the lower tooth (8) and the member (1
It is a technology that is interposed between 3). In addition, (14) is an upper tooth for clamping the plate (4), and (15) is an upper tooth (1
4) Shows a tightening cam that raises and lowers 4).

However, according to the above-mentioned conventional technique, since the plate tension cam (10) is covered with the plate (4), the operation position of the plate tension cam (10) (a spanner is applied to the plate tension cam (10) to rotate the plate tension cam (10). However, it is inconvenient for the operation because it is limited to both ends in the width direction (the direction perpendicular to FIG. 8).

In addition, when assembling, it takes time to mount the first spring (9) and time is required for fine adjustment.

Furthermore, since the plate tension cam (10) exists between the side surface (11) of the cutout portion and the push rod (7), it is inevitably a two-faced cam, which increases the manufacturing cost.

In addition, the lower teeth (8) are used to insert the plate tension cam (10).
There is no choice but to provide a concave portion (16) over the entire width (in the vertical direction of FIG. 8) of the concave portion (16).
Since the plate (4) is clamped above, the rigidity of the lower teeth (8) is insufficient.

(Problems to be Solved by the Invention) The present invention has been made in view of the above problems, and provides an improved plate clamping device, which has excellent operability, is easy to manufacture and assemble, and is rigid. To obtain an improved device.

(Means for Solving the Problem) For this purpose, the plate clamp device according to the present invention extends in the width direction of the clamp base (18) on the side opposite to the wall portion (17) of the plate cylinder groove (2). One sliding cam (2) that is installed and rotatably supported by the clamp base (18).
6) and a push pin (28) which is attached to a plurality of places of the clamp base (18) so as to be movable in the secant direction and one end of which contacts the slide cam (26), and which is concentric with the push pin (28). A winding member (33) movably mounted on the clamp base (18), wherein a flange portion (34) at one end abuts the push pin (28) and is wound around a central shaft portion (35). A wall portion (17) which is concentrically arranged with the winding member (33) and which receives one end of the hung spring member (36) and has an adjusting screw (39) screwed into the other end. Is a support member (38) having an H-shaped cross-section that abuts against the shaft member (34) of the wrapping member (33), and the spring member (36). One that receives the edge, and the other.

(Operation) According to the device of the present invention, since the sliding cam (26) exists on the side opposite to the bite position of the plate (4), it is not covered by the plate (4), and therefore the sliding cam (26). This is convenient because the positions to which the tools (25) and (29) for rotating the can be applied can be arbitrarily determined.

Further, the winding member (33), the spring member (36) and the supporting member (38) can be assembled and adjusted in advance as an integrated unit, and this unit can be mounted on the clamp base (18).
Since it is only necessary to fit it in, it is possible to significantly reduce the assembly adjustment time.

Furthermore, since the sliding cam (26) functions only with respect to the push pin (28), a single-sided cam is sufficient and the manufacturing cost is low.

In addition, since it is not necessary to provide a concave portion or a notch at the plate biting portion of the clamp base (18), sufficient rigidity can be maintained.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of a plate clamping device according to the present invention, showing a half of the device in the width direction,
2 to 4 are sectional views taken along the line II-II in FIG. 1 for explaining the operation of the device of the present invention, and FIG. 5 is a sectional view taken along the line VV in FIG. FIG. 6 is likewise a sectional view taken along line VI-VI.

In the drawings, (2) shows a plate cylinder groove, and (17) shows a wall portion of the plate cylinder groove (2). Therefore, the left-right direction of FIGS. 1 to 6 is the secant direction, and the up-down direction of FIG. 1 is the width direction of the plate cylinder (1).

The clamp base (18) is an elongated base body along the width direction, and is formed by a known combination of, for example, a ridge on the lower surface thereof and a groove (not shown) of the plate cylinder groove (2). It is slidable in the secant direction under the guide of the side wall (19) and the regulating member (20) of 1).

Further, the clamp base (18) is constantly urged by the spring (21) of FIG. 6 in the direction of the wall portion (17), in other words, in the direction of loosening the plate (4).

The clamp plate (22) is movably connected to the clamp base (18) by a mounting bolt (23), and the clamp cam (24) is rotated by a tool (25) to thereby end the plate (4). Bite / release Since this configuration is already well known, its details are omitted.

In the plate clamp device as described above, in the device of the present invention, one slide cam (26) that slides the clamp base (18) and pulls the plate (4) against the force of the spring (21). ) Is provided on the side of the plate cylinder groove (2) opposite to the wall portion (17). As shown in FIGS. 1 and 5, the sliding cam (26) is rotatably supported at a plurality of points by a blanket (27) which is integral with the clamp base (18), and the clamp base (18). Of the clamp base (18). Further, since the sliding cam (26) is related only to the push pin (28) described later, it is a single-sided cam, and the insertion hole (30) for the tool (29) is bored at an arbitrary position. There is.

The push pin (28) has a first guide hole (3) penetrating the clamp base (18) at a plurality of positions in the secant direction.
It is movably mounted in 1) and its center coincides with the center of the sliding cam (26). Then, one end thereof is brought into contact with the sliding cam (26) and is pushed.

Following the first guide hole (31), a larger diameter second guide hole (32) is concentrically provided. The wrapping member (33) is fitted in the second guide hole (32). One end of the winding member (33) is a large-diameter flange portion (34) that slides in the second guide hole (32) and abuts on the end portion of the push pin (28). Receive power. In addition, the central shaft portion (3
5) includes a spring member (3) which is a compression coil spring.
6) is wound, and one end thereof is received by the flange portion (34). Furthermore, a threaded portion (37) is formed at the other end of the winding member (33), and a supporting member (3) described later is formed.
An adjusting screw (39) is screwed onto the knuckle portion (40) of 8).

The support member (38) is a tubular member having an H-shaped cross section,
The outer periphery thereof is slidably fitted in the second guide hole (32), and the spring member (36) is received by the knuckle portion (40) inside thereof, and the shaft portion of the winding member (33) is also received. (35) is inserted. The spring member (36) is located on the sliding cam (26) side, and the adjusting screw (39) is located on the wall part (17) with the knurl (40) as a boundary.
It is located on the side, and the tip of the support member (38) is elastically contacted with the wall portion (17). The clearance hole (41) may be formed in the wall portion (17) in consideration of the strokes of the winding member (33) and the adjusting screw (39).

As described above, the winding member (33) and the supporting member (3
8) both receive the spring member (36),
The shaft portion (35) is inserted into the wheel contact portion (40),
Also, the spring member (3
It is integrated after adjusting the condition of 6). Therefore, it is only necessary to assemble these three members in advance as an integral unit and then insert them into the second guide hole (32), which greatly simplifies assembly adjustment.

Next, the operation of the clamp device of the present invention will be described with reference to FIGS. 2 to 4.

In the state shown in FIG. 2, the clamp plate (22) stands up about the mounting bolt (23), so that the plate (4) is not yet clamped. Further, since the push pin (28) is in contact with the valley portion of the sliding cam (26), the spring member (36) is not substantially subjected to the compressive force.

Therefore, as shown in FIG. 3, first, the end of the plate (4) wound around the plate cylinder (1) is sandwiched between the clamp base (18) and the clamp plate (22), and the clamp cam (24) is attached to the tool. It is rotated in the arrow direction by (25). Then, the end of the plate (4) is bitten with the clamp base (18).

Next, as shown in FIG. 4, another tool (29) is attached to the sliding cam (2).
The slide cam (26) is inserted in the insertion hole (30) of 6) and rotated in the arrow direction. Then, the crest portion of the sliding cam (26) presses the push pin (28), and accordingly, the winding member (33) is also pushed rightward in the drawing. At this time, the flange portion (34) of the winding member (33) and the support member (3
The spring member (36) interposed between the knuckle portion (40) of (8) is compressed, and as a reaction force thereof, the support member (3).
8) is pressed toward the wall portion (17) and the wrapping member (33) is pressed toward the left in the drawing. This pressing force is applied to the push pin (2
Although it is transmitted to the sliding cam (26) itself via 8), since the sliding cam (26) itself is integrated with the clamp base (18) by the bracket (27), the clamp base (18) is eventually leftward in the drawing. Slide on the plate (4), which pulls the plate (4).

In other words, the sliding cam (26) receives the reaction force of the spring member (36) generated by its rotation,
Moved in the secant direction with the clamp base (18),
At this time, the plate (4) is pulled.

For the sake of understanding the drawings, the sliding cam (2
It is natural that the positional relationship between the rotation center of 6) and the clamp base (18) is unchanged as long as both are integrated. In addition, the adjusting screw (3) at the end of the winding member (33).
9) is a support member (3) as shown in FIG.
It contacts with 8) and functions as a position limiting member. Then, when the sliding cam (26) is rotated, the winding member (33) is pushed in, so that it tries to largely separate from the supporting member (38), but the clamp base (18) and the sliding cam (26) are As it moves, the moving part is subtracted, and the amount of separation remains small as shown in FIG.

(Effect of the Invention) The device of the present invention is excellent in operability, and is significantly improved in manufacturing, assembly, and rigidity, and is useful as a plate clamping device.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a plate clamp device according to the present invention, showing a half of the device in the width direction. 2 to 4 are cross-sectional views taken along the line II-II of FIG. 1 for explaining the operation of the device of the present invention. FIG. 5 is a sectional view taken along the line VV of FIG. FIG. 6 is likewise a sectional view taken along line VI-VI. FIG. 7 is a cross-sectional explanatory view showing the outline of the plate clamp device. FIG. 8 is a cross-sectional explanatory view of a conventional technique. (Explanation of symbols) 1 ... plate cylinder 2 ... plate cylinder groove 4 ... plate 17 ... wall part 18 ... clamp base 21 ... spring 22 ... clamp plate 23 ... mounting bolt 24 ... clamp cam 25 …… Tool 26 …… Sliding cam 28 …… Pushing pin 29 …… Tool 30 …… Insertion hole 31 …… First guide hole 32 …… Second guide hole 33 …… Winding member 34 …… Flange part 35 ...... Shaft 36 ...... Spring member 38 ...... Support member 39 ...... Adjusting screw 40 ...... Ring joint

Claims (1)

[Scope of utility model registration request] 1. A plate cylinder groove (2) comprising a clamp base (18) slidable in the secant direction of the plate cylinder (1) and a clamp plate (22) which is movably connected to the clamp base (18). Is provided on the plate, and the clamp plate (22) is undulated to bite the end of the plate (4), and
A plate clamp device of a printing press of a type in which a plate (4) is pulled by sliding a clamp base (18), the clamp base (2) being opposite to a wall (17) of the plate cylinder groove (2). 18) A sliding cam (26) extending in the width direction of the clamp base (18) and rotatably supported by the clamp base (18), and attached to a plurality of positions of the clamp base (18) movably in the secant direction. A push pin (28), one end of which contacts the slide cam (26), and a clamp base (18) concentric with the push pin (28).
Is a winding member (33) movably mounted on the spring, in which a flange portion (34) at one end abuts on the push pin (28) and which is wound around a central shaft portion (35). A member (36) that receives one end of the member (36) and has the other end screwed with an adjusting screw (39), and that is disposed concentrically with the winding member (33).
Is a support member (38) having an H-shaped cross section, which abuts on the shaft portion (3) of the winding member (33) on the knuckle portion (40).
5) is inserted and the spring member (3
6) A plate clamp device of a printing machine, which receives the other end.