JPH0641201B2 - Claw seat height adjustment device for sheet-fed printing press - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-fed printing machine, and more particularly, to an intermediate transfer cylinder that conveys paper by interposing a plurality of printing units.
The present invention relates to a claw seat height adjusting device that adjusts the height of a claw seat that grips a sheet together with a gripper according to the sheet thickness.

(Background of the Invention) In a multi-color sheet-fed printing press, as shown partially in FIG. 5, a plurality of plate cylinders (1), blanket cylinders (2), impression cylinders (3), etc. are provided. The printing units are connected by the intermediate transfer cylinder (4), and the paper (5) is sequentially conveyed. That is, the pattern is transferred from the blanket cylinder (2) side while the paper (5) is being held by the claw mechanism (6) of the impression cylinder (3) of the preceding printing unit, and the intermediate transfer with the impression cylinder (3). At the contact point with the cylinder (4), the paper (5) is attached to the claw mechanism (7) of the intermediate transfer cylinder (4).
Is handed over. Further, after the intermediate transfer cylinder (4) is rotated, the paper (5) is transferred from the claw mechanism (7) to the impression cylinder (3) of the printing unit of the next row, and the next printing is performed. I will go.

The pawl mechanism (7) of the intermediate transfer cylinder (4) is constituted by a combination of a gripper (8) which is a movable part and a pawl seat (9) which is a fixed pedestal, as is known. Is common. The gripper (8) includes a single pawl that is directly opened and closed by a pawl shaft (10) and a pawl shaft (1
There is a double claw driven from 0) via a spring, but it is still the same that a large number of claw shafts (10), which are common shafts, are simultaneously driven to open and close. On the other hand, the claw seat (9) is a pedestal fixedly arranged on the outer circumference of the body corresponding to the gripper (8), and is provided with serrations or the like to increase the frictional force for gripping the paper and A hardening treatment is applied to improve durability.

By the way, when the delivery state of the paper (5) at the contact point between the impression cylinder (3) and the intermediate delivery drum (4) is examined in detail, a good delivery state is shown in FIG. 6 (a).
・ (B) On the other hand, FIGS. 7 (a) and 7 (b) show unfavorable delivery states. 6 (a) and 7 (a) are sectional views of the impression cylinder (3) and the intermediate transfer cylinder (4) in the cylinder radial direction, respectively. 4) alternately has a plurality of claw mechanisms composed of grippers (11) and (8) and claw seats (12) and (9) paired therewith. And, FIG. 6 (b) and FIG. 7 (b) are arrow views along the trunk axis direction, respectively, as seen from the directions of arrows VI and VII in FIG. 6 (a) and FIG. 7 (a). is there. As can be intuitively understood from the drawings, the good or ideal delivery state is that the gap H between the claw seats (12) and (9) in the body radial direction and the paper thickness t match. This is the case, and as shown in FIG. 6 (b), at this time, the paper (5) is gripped and delivered by each claw mechanism in a state where the paper (5) is evenly arranged in the trunk axis direction. .

On the other hand, the unfavorable delivery state means that the gap H in the cylinder radial direction between the nail seats (12) and (9) is excessively larger than the paper thickness t due to the mismatch between the paper thickness t and the height of the nail seat. In some cases, the sheets of paper (5) are alternately arranged on the impression cylinder (3) side and the intermediate transfer cylinder (4) side, as shown in a slightly exaggerated manner in FIG. 7 (b). It is gripped and delivered in a wave-like uneven state by the claw mechanism.

The occurrence of such a wave state causes a fatal problem in print quality. Therefore, not only the twist and misregistration of the paper (5) to be subjected to multicolor printing but also the fan-out that widens the paper width in a fan shape. This causes printing problems such as.

In order to prevent the printing trouble due to the occurrence of the wave state, first, the fact that the paper thickness t of the paper (5) that is applied to a normal sheet-fed printing machine is in a wide range from about 0.04 mm to about 0.6 mm, It must be taken into account that the impression cylinder (3) is used as a reference for printing, and thus for registering, and its nail seat (12) is fixed. Therefore, after all, the height of the claw seat (9) of the intermediate transfer cylinder (4) in the cylinder radial direction is adjusted so that the gap H is as close to the paper thickness t as possible.
It is necessary to make the delivery state of the paper (5) good.

(Prior Art) As a technique for adjusting the height of the nail seat as described above, in Japanese Patent Laid-Open No. 62-207648, a tongue base (that is, a nail seat) is supported and a waist cutout is supported. In a printing cylinder with a nail base bar fixed on the bottom with multiple bolts,
Disclosed is a claw plate up / down device for a printing cylinder, which is provided with a liner that is insertably / removably inserted between a claw plate bar and a bottom face of a cylinder notch.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional technique, since the plurality of thin liners are attached to and detached from a narrow space in the vicinity of the waist, it takes time to attach / remove the liner, and , It is difficult to confirm whether it was installed correctly.

In addition, since the printing machine is used in an atmosphere in which numerous paper dusts and powders are scattered, it is necessary to carefully wipe the installation surface of the liner every time the liner is attached or detached, which is troublesome. .

Furthermore, when the liner is not used, it must be stored separately, which is rather troublesome.

The present invention has been made in view of the above problems, and provides an improved claw seat height adjusting device, the main purpose of which is to obtain a device in which adjustment work is simple and atmosphere measures can be perfectly taken. is there.

(Means for Solving Problems) For this purpose, the pawl seat height adjusting device according to the present invention is provided with a pawl seat height adjusting device formed in the notch portion of the intermediate transfer cylinder (4) along the cylinder axial direction. And a large number of claw seat bodies (17) and a flat bottom surface for adjusting the claw seat height. A plurality of adjusting recesses (18) formed along the trunk axis direction on at least one of the reference surface (19) and the bottom surface of the nail seat block (18). 21), a first reference contact surface (25) that can be fitted into the adjustment recess (21), and a second reference contact surface having a height different from that of the first reference contact surface (25). (26) and have in the body axis direction,
An adjusting member (24) slidably provided between the reference surface (19) and the claw seat block (18), and a stopper bolt (for limiting the movement amount of the claw seat block (18) in the body radial direction ( 35), a spring member (34) for urging the claw seat block (18) outward in the radial direction of the body, and a switching shaft (29) erected on the body of the body as the center of the neck in the body axial direction. A switching arm (28) which is swingable and engages with the adjusting member (24).

(Operation) According to the device of the present invention, the adjusting member (24) is slid in the trunk axis direction in accordance with the paper thickness to adjust the adjusting member (2
The first reference contact surface (25) of 4) is the nail seat block (1).
When contacting the bottom surface of 8), the nail seat body (17) is adjusted to a higher position, and the first reference contact surface (25) is in the adjustment recess (21) of the nail seat block (18). Insert it,
When the second reference contact surface (26) contacts the bottom surface of the nail seat block (18), the nail seat body (17) is adjusted to a lower position.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partially cutaway plan view along the cylinder axis direction of an intermediate transfer cylinder of a sheet-fed printing press equipped with a nail seat height adjusting device according to the present invention, and FIG. 2 (a) is a front view of the same. 2 (b) is a front view when the nail seat body is adjusted to a lower position, and FIG. 3 (a).
Is a sectional view taken along the line IIIa-IIIa in FIG. 1, and FIG. 3 (b) is
The IIIb-IIIb line sectional view and FIG. 4 are the IV-IV line sectional views.

In FIG. 1, the left half of the intermediate transfer cylinder (4) is shown in a plane along the cylinder axis direction, and the gripper shaft (15) supported by the bearer (13) and the bearing (14) is ,
The grippers (16) constituting the pawl mechanism are arranged at appropriate intervals, and the pawl seat body (17) is fixed to the pawl seat block (18) in response to these grippers (16). . The opening / closing operation of the gripper (16) is performed by rotating the gripper shaft (15) by a cam mechanism, but this is not shown because it is already well known. Further, since the present invention has nothing to do with the form of the gripper (16), it can be applied to both single and double claws.

In FIGS. 3 (a), (b) and FIG. 4, the intermediate transfer cylinder (4) is shown as a cross section in the cylinder radial direction, and therefore the vertical direction of the drawing is the cylinder radial direction, and It may be understood that the direction perpendicular to the direction is the axial direction of the cylinder, and the center of the cylinder is at the bottom of the drawing.

The intermediate transfer cylinder (4) has a gripper (1
6) and the gripper shaft (15), and further the gripper (16)
In order to dispose the opening / closing mechanism inside, a cutout portion is formed by cutting out the body of the circular cross section. In the device of the present invention, the cutout portion has a reference surface for adjusting the height of the nail seat. (19) is formed along the trunk axis direction. Such a reference plane (19) is strictly set with reference to the center of the cylinder, and can be strictly processed when the intermediate transfer cylinder (4) is manufactured.

A nail seat block (18) having a large number of nail seat bodies (17) corresponding to the grippers (16) fixed by screws (20).
Is a long member along the trunk axis direction. Then, as understood from FIGS. 2 (a) and 2 (b), the bottom surface thereof is made flat for adjusting the height of the claw seat, and a plurality of adjustment recesses (21) are formed at appropriate intervals along the trunk axis direction. )have.

A plurality of adjustment blocks (22) are provided between the reference surface (19) and the nail seat block (18) to form a long guide plate (2).
The adjusting member (24) integrated by 3) is provided so as to be slidable in the coaxial direction. In this embodiment,
The reference surface (19) side of the adjustment block (22) is a flat surface similar to this reference surface (19), while the claw seat block (18) side of the adjustment block (22) has this claw. In response to the adjusting recess (21) of the seat block (18), the first
The reference contact surface (25) and the second reference contact surface (26) are provided in the trunk axial direction with a predetermined step. However, such a step may be provided on the reference surface (19) side of the adjustment block (22) and a required recess may be provided on the reference surface (19).

As shown in FIG. 2 (b), the adjustment recess (21) is sized to receive the first reference contact surface (25) of the adjustment block (22), and the adjustment block (2).
When 2) is stroked in the trunk axis direction by the guide plate (23), all the first reference contact surfaces (25) are fitted into the corresponding adjustment recesses (21) all at once.

Therefore, as shown in FIG. 2A, when the first reference contact surface (25) remains in contact with the bottom surface of the nail seat block (18), the nail seat block (18) and thus the nail seat block (18). The main body (17) is located at a high position in the body radial direction, and conversely, as shown in FIG. 2 (b), the first reference contact surface (25) is fitted into the adjustment recess (21). When the second reference contact surface (26) is in contact with the bottom surface of the pawl seat block (18), the pawl seat body (17) is at a low position.

In order to slide the adjustment member (24) in the trunk axis direction, an L-shaped guide pin (27) is hung from one end of the guide plate (23), and the tip of the switching arm (28) is attached to this guide pin (27). Are engaged.

The switching arm (28) is provided with a switching shaft (2
It is possible to swing in the body axis direction together with 9), and the tool insertion hole (30) (hexagonal hole) of the switching shaft (29) is inserted into the tool (31) (Fig. 5) (with a hexagonal wrench). 1) is inserted and rotated to swing the adjusting member (24) in the axial direction of the body as shown in FIG. .

Further, as shown in FIG. 3 (b), when the adjusting member (24) is slid, the pawl seat block (18) is floated to facilitate sliding so that the pin (33) erected on the reference plane (19). ) Is provided with a spring member (34) to bias the pawl seat block (18) outward in the radial direction of the body.

However, since the nail seat block (18) must not protrude from the circumference of the intermediate transfer cylinder (4), the nail seat block (1)
In order to limit the movement amount of 8), as shown in FIG. 3 (a), a stopper bolt (35) penetrates the pawl seat block (18) and is planted on the reference surface (19).

Slide the adjusting member (24) to slide the nail seat block (1
After adjusting the height of 8), the nail seat block (18) and the like are fixed to the reference surface (19). This function is fulfilled by the clamp bolt (3 shown in FIGS. 2A and 4).
6), which is loosely fitted in the oblong hole (37) of the adjusting block (22) and then implanted in the body of the body. Note that (38)
Shows a ring for preventing the clamp bolt (36) from coming off.

In addition, the scale (39) shown in FIGS. 2 (a) and (b)
Is a mark for knowing the slid state of the adjusting member (24) and thus the adjusted height of the nail seat body (18).

Further, as shown in FIGS. 1 and 3 (a) and (b),
A dustproof seal (40) is attached to the adjusting member (24) by a guide plate (23). In addition,
(41) shows another seal. Further, (42) shows a sheet for preventing stains on the paper (5).

(Effect of the Invention) According to the pawl seat height adjusting device of the present invention, the height of the pawl seat block and thus the pawl seat body can be simply adjusted by sliding the adjusting member having two types of reference contact surfaces in the trunk axis direction. It can be easily adjusted according to the paper thickness.

Also, the atmosphere can be easily taken only by providing a seal on the adjusting member.

Furthermore, the adjustment work can be completed only from the outer circumference in the body radial direction.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view along the cylinder axis direction of an intermediate transfer cylinder of a sheet-fed printing press equipped with a claw seat height adjusting device according to the present invention. FIG. 2 (a) is a front view of the same. FIG. 2B is a front view when the nail seat body is adjusted to a low position. FIG. 3A is a sectional view taken along the line IIIa-IIIa in FIG. FIG. 3 (b) is a sectional view taken along the line IIIb-IIIb. FIG. 4 is a sectional view taken along the line IV-IV. FIG. 5 is a schematic view showing a sheet conveying mechanism of a multi-color sheet-fed printing machine. 6 (a) and 6 (b) are a cross-sectional view and an arrow view showing a good delivery state of the sheet. 7 (a) and 7 (b) are a sectional view and an arrow view showing an undesired delivery state. (Explanation of symbols) 4 ... Intermediate transfer cylinder 5 ... Paper 16 ... Gripper 17 ... Claw seat body 18 ... Claw seat block 19 ... Reference surface 21 ... Adjusting recess 22 ... Adjusting block 23 ... Guide Plate 24 ... Adjusting member 25 ... First reference contact surface 26 ... Second reference contact surface 27 ... Guide pin 28 ... Switching arm 29 ... Switching shaft 33 ... Pin 34 ... Spring member 35 …… Stopper bolt 40 …… Seal 41 …… Seal

Claims (1)

[Claims] 1. A reference surface (19) for adjusting the height of a pawl seat, which is formed in a cutout portion of an intermediate transfer cylinder (4) along the cylinder axial direction.
And a large number of nail seat bodies (17) and a flat bottom surface for adjusting the height of the nail seat.
With respect to the claw seat block (1
8), and a nail seat height adjusting device for a sheet-fed printing press having a plurality of plurality formed on at least one of the reference surface (19) and the bottom surface of the nail seat block (18) along the trunk axis direction. Adjusting recess (21) and a first reference contact surface (2) that can be fitted into the adjusting recess (21).
5) and a second reference contact surface (26) having a height different from that of the first reference contact surface (25) in the trunk axial direction, and the reference surface (19) and the claw seat block. An adjusting member (24) slidably interposed between the pawl seat block (18), a stopper bolt (35) for limiting the amount of movement of the pawl seat block (18) in the body radial direction, and the pawl seat block A spring member (34) for urging (18) outward in the body radial direction and a switching shaft (29) erected on the body of the body are pivotable in the body axial direction, and the adjusting member is provided. A nail seat height adjusting device for a sheet-fed printing press, comprising a switching arm (28) engaging with (24).