JPH071713A - Coupling device for reversing mechanism - Google Patents

Abstract

PURPOSE:To realize sure and safe coupling and consequently highly reliable remote controlling from outside by a method wherein clamping torque, which is excessively higher beyond a certain value, applied to a clamping bolt is absorbed by a one-way clutch means. CONSTITUTION:By means of a stationary gear 5, a pivotable adjustable gear 6 and a plurality of bolts 11 arranged in the satillitic fashion, a one-way clutch means 23, which absorbs the clamping torque larger by a certain value with respect to clamping direction and, on the contrary, transmits the releasing torque as it is with respect to releasing direction, is provided. The device concerned is equipped with a center gear 24 having an external gear for giving torque to itself integrally with an internal gear for transmitting torque to the one-way clutch means 23 and a driving means for transmitting torque to the center gear 24. As a result, a device, the coupling function of which is sure and stable, the reliability of the remote controlling of which from outside is high and which can flexibly deal with individual circumstances in a plurality of clamping bolts, is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversing mechanism for switching single-sided printing / double-sided printing in a sheet-fed printing machine, and more particularly, it is arranged at the shaft end of a reversing cylinder during double-sided printing. The present invention relates to a coupling device for adjusting the mutual phases of a plurality of gears and fixing the positions by adjusting according to the paper size.

[0002]

BACKGROUND OF THE INVENTION In a sheet-fed printing machine for printing on a sheet, one-sided printing for printing only on the front surface of the sheet and two-sided printing for printing not only on the front surface but also on the back surface of the sheet are performed. . That is, in the case of single-sided printing, a plurality of printing units including a plate cylinder, a blanket cylinder, an impression cylinder, and an inking device are connected by a double-diameter cylinder, and printing is sequentially performed on only one surface of the sheet. On the other hand, in the case of double-sided printing, a paper feed cylinder, a double-diameter intermediate cylinder,
A reversing mechanism including a reversing cylinder is provided to reverse the printed sheet and perform printing on the back side. As an example, printing of four colors on the front side of the sheet and two colors on the back side may be performed.

The center of the sheet reversing operation is the reversing cylinder and its reversing gripper, which is different from the one-sided printing in which the front edge of the sheet is simply passed over. Also, the reverse gripper receives the trailing edge of the sheet from the trailing edge gripper of the double-diameter intermediate cylinder located on the upstream side,
As the reversing cylinder rotates, the sheet is turned upside down, and the sheet is delivered to the impression cylinder of the printing unit located downstream of the reversing cylinder.

By the way, since the reversing gripper of the reversing cylinder receives the trailing edge of the sheet from the upstream double-diameter intermediate cylinder, the trailing edge passing phase of the sheet between the double-diameter intermediate cylinder and the reversing cylinder depends on the paper size. Must be set. In this case, the sheet size of the sheet applied to the sheet-fed printing machine varies, and in addition, the gears of the cylinder group of the printing unit and the cylinder group of the reversing mechanism are meshed in series and driven in a timely manner. It is necessary to adjust the phases of the drive gears of the cylinder group located upstream of the reversing cylinder and the drive gears of the drum group downstream of the reversing cylinder in accordance with the paper size during double-sided printing.

Therefore, at the end of the barrel shaft of the reversing cylinder, the gears meshing with the upstream drive gear group and the gear meshing with the downstream drive gear group are adjustable in mutual phase in the rotational direction. It is mounted, phase-adjusted according to the above-mentioned needs, and is coupled to the body shaft.

[0006]

2. Description of the Related Art In Japanese Utility Model Laid-Open No. 61-85436, as shown in FIG. 8, a fixed gear (which is fixed to an end of a body shaft (101) of a reversing cylinder and meshes with a drive gear on a downstream side ( 1
02) and a rotatable adjustment gear (103) juxtaposed with the fixed gear (102) and meshing with the upstream drive gear.
A lever (106) that is supported by a pin (104) and is biased by a spring (105), and has one end that presses the adjustment gear (103) against the fixed gear (102) to fix it; and this lever (106). (107) for releasing the fixing of the adjusting gear (103) by pushing the other end of the above) from the outside of the reversing cylinder.

However, this coupling device is
Although it enables remote control from the outside, it is only a coupling by a spring (105) and a lever (106), so as a coupling device of a reversing mechanism that is continuously used under severe conditions. It is uncertain.

Further, in Japanese Patent Laid-Open No. 58-71163, adjustment is made by a fixed gear (201), a rotatable adjustment gear (202), and a holding plate (203) as shown in FIG. In order to position-fix the gear (202) integrally with the fixed gear (201), a plurality of through bolts (205) arranged in a satellite shape around the trunk shaft (204) and the through bolts (205) are provided. Another having a plurality of geared nuts (206) for tightening and a center pinion (207) located at the center of the trunk shaft (204) and integrally rotating the plurality of geared nuts (206) A coupling device is disclosed.

However, this coupling device is
There is no remote control of the reversing cylinder from the outside and therefore manual reliance on the operator is required to switch to duplex printing. In addition, a plurality of through bolts (2
05) and the nut with gear (206) have individual circumstances such as variations in tightening force, but we cannot handle it,
Remains on inadequate equipment.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides an improved reversing mechanism coupling device, and an object thereof is to make the coupling reliable and stable. That is, reliable remote control from the outside, and flexibility to deal with individual circumstances of multiple bolts for tightening.

[0011]

To this end, the coupling device of the reversing mechanism according to the present invention is fixed to the end portion of the body shaft (2) of the reversing cylinder, and is connected to the drive gear (8) on the downstream side. A fixed gear (5) that meshes with the fixed gear (5) that is rotatable around the barrel shaft (2), and an adjustment gear (6) that meshes with the upstream drive gear (9); Presser plate (1
A plurality of tightening bolts (11) arranged in a satellite shape around the trunk shaft (2) in order to fix the adjustment gear (6) integrally with the fixed gear (5) by means of 0), With respect to the tightening direction, a one-way clutch means (23) that absorbs a tightening torque equal to or more than a certain value, and, conversely, transmits the releasing torque as it is with respect to the disengaging direction, centering around the body shaft (2). Is rotatably supported by a plurality of tightening bolts (1
1) A center gear (24) integrally having an internal tooth (27) for transmitting torque to the one-way clutch means (23) and an external tooth (29) for receiving the torque to itself.
From the motor (36) outside the reversing cylinder to the clutch means (3
Drive means (37) for transmitting torque to the center gear (24) via (2).

[0012]

First, in order to release the fixed position of the adjusting gear (6), the clutch means (32) of the drive means (37) is inserted, and the release torque from the drive means (37) is applied to the center gear (24). When the external teeth (29) → the internal teeth (27) → the one-way clutch means (23) of the tightening bolt (11) → the tightening bolt (11) are transmitted through the route, the tightening bolt (11)
Loosens and the holding plate (10) frees the adjusting gear (6).

Then, a required rotation phase portion corresponding to the paper size, the adjustment gear (6) is rotated with respect to the fixed gear (5).

Then, in order to couple the adjusting gear (6) to the fixed gear (5) again, the driving means (3) is used.
Put the clutch means (32) of 7), and drive means (3
7) The tightening torque from the center gear (24) through the external teeth (29) → internal teeth (27) → tightening bolt (11) one-way clutch means (23) → tightening bolt (11). introduce. At this time, the one-way clutch means (23) absorbs an excessive tightening torque with respect to the tightening bolt (11) exceeding a certain value.

As a result, the individual circumstances of the plurality of tightening bolts (11) are absorbed, and all the tightening bolts (1) are absorbed.
The tightened state of 1) can be made uniform. Also, the coupling itself is reliable, and in addition, the remote control is perfect and no manual work is required.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2 are cross-sectional views showing an embodiment of the coupling device according to the present invention. FIG. 1 shows a main part of the device, and FIG. 2 shows a driving means.

Reference numeral (1) indicates a side wall of the sheet-fed printing press,
The barrel shaft (2) of the reversing barrel is rotatably supported by the pair of side walls (1). A mounting base (3) is fixed to the end of the body shaft (2) by bolts (4), and a fixed gear (5) and an adjusting gear (6) are mounted on the mounting base (3).

The fixed gear (5) is fixed to the mounting base (3) by bolts (7). A drive gear (8) of, for example, an impression cylinder of a printing unit, which is on the downstream side of a reversing cylinder (not shown), meshes with the fixed gear (5).

Further, the adjusting gear (6) has a mounting base (3).
As a result, the adjustment gear (6) is arranged in parallel with the fixed shaft (2) so as to be rotatable with respect to the body shaft (2). The drive gear (9) is meshed.

After adjusting the phase of the adjusting gear (6) rotatable about the body shaft (2) for double-sided printing,
It is the coupling device according to the invention that is fixed in position with respect to the mounting base body (3) and by extension to the fixed gear (5) by means of the holding plate (10), for which purpose a plurality of tightening bolts (1)
1) is provided.

That is, as shown in FIG. 3 which is a sectional view taken along the line III-III of FIG. 1 and FIG. 4 which is a sectional view taken along the line IV-IV of FIG. The bolt (11) and the retainer plate (10) are arranged in a satellite shape in which the circumference around the trunk shaft (2) is equally divided.

Details of the tightening bolt (11) are shown in FIG.
Is shown in a single section view. The bolt body (12) is
A neck (13) with a thread on its outer circumference, this neck (13)
It also consists of a threaded medium diameter part (14) and a large diameter part (17) with rolling surfaces (16) for a number of rollers (15). In the large diameter part (17), a large number of rollers (15) are arranged on the outer peripheral rolling surface (16) with a certain twist angle by the retainer (18), and these rollers (15) are further arranged. Around the
An outer ring gear (19) having teeth on its outer periphery is fitted.

Reference numeral (20) indicates a preload bearing, and this preload bearing (20) also has a large diameter portion (17).
And is pressed against the end surface of the outer ring gear (19) by two preload springs (21) fitted in the middle diameter portion (14). Furthermore, a disc spring-shaped preload spring (21)
The spring pressure adjusting nut (22) generates a predetermined spring pressure. The roller (15), the outer ring gear (19), etc. constitute a one-way clutch means (23) for the tightening bolt (11).

The function of the one-way clutch means (23) will now be described with reference to FIGS. 6 and 7. First, when the tightening bolt (11) is loosened, the outer ring is moved in the arrow direction of FIG. Rotate the gear (19). Then,
At this time, a large number of rollers (15) arranged on the rolling surface (16) with a constant twist angle are locked for tightening with respect to the large diameter portion (17), and are in a so-called bite clutch state. Accordingly, the release torque is set to the outer ring gear (1
9) is transmitted to the large diameter part (17), and the tightening bolt (1
1) is loosened, and the presser plate (10) also adjusts the gear (6).
Free.

On the contrary, when tightening the tightening bolt (11), the outer ring gear (19) is rotated in the direction of the arrow in FIG. At this time, a large number of rollers (15) are pulled apart from each other and roll in a free state, so that the large diameter portion (1
No torque is transmitted to 7). At this time, it is the preload bearing (20) pressed against the end portion of the outer ring gear (19) by the preload spring (21) to transmit the tightening torque. A predetermined spring pressure is generated in the preload spring (21) by the spring pressure adjusting nut (22), but up to a constant torque proportional to this spring pressure, a large diameter portion is passed through the preload bearing (20). The tightening torque is transmitted to (17). However, when the tightening torque exceeds this constant value, slipping occurs in the preload bearing (20) and no further torque transmission is performed, so that the tightening bolt (11) always has a constant value. Only the applied torque will be transmitted.

In other words, the one-way clutch means (23) of the tightening bolt (11) absorbs a tightening torque of a certain value or more in the tightening direction, and conversely transmits the release torque as it is in the releasing direction. To do.

Returning to FIG. 1 again, a center gear (24) is provided to integrally transmit torque to the plurality of tightening bolts (11) arranged in a satellite shape. That is, one end of the gear shaft (25) is connected to the center of the mounting base (3), and the other end is supported by the guide frame (26). The center gear (24) is rotatable around the gear shaft (25) and then the trunk shaft (2),
As shown in FIG. 4, a plurality of one-way clutch means (23)
Inner teeth (27) that mesh with the outer ring gear (19) of the outer gear (19) and outer teeth (2) for receiving the torque from the relay gear (28).
9) and are integrated.

The relay gear (28) is provided with a guide frame (2
6) is rotatably supported by a shaft (30), and a first tooth portion (31) meshing with an outer tooth (29) of a center gear (24) and a gear (32) of a clutch means (32). 33) and a second tooth portion (34) that meshes with it.

A gear (3) fixedly connected to the clutch shaft (35)
The member from 3) to the motor (36) constitutes the drive means (37) including the clutch means (32). That is, the sub-frame (38) and the guide frame (26)
A clutch shaft (35) is rotatably supported between the clutch shaft (35) and a motor gear (39) coupled to the motor (36) to a clutch gear (40) rotatably attached to the clutch shaft (35). Torque is transmitted. Electromagnetic clutch means (32) facing the clutch gear (40)
Is fixed to the clutch shaft (35), and only when these clutch gear (40) and the fixed portion (41) are electromagnetically coupled (state of FIG. 2), The torque of the motor (36) changes from the clutch shaft (35) to the gear (33) → relay gear (28) → center gear (2).
4) → Transmitted through the route of the outer ring gear (19) of the tightening bolt (11).

Next, the operation will be described. To release the fixed position of the adjusting gear (6), the motor (36) of the drive means (37) is rotated while the electromagnetic clutch means (32) is turned on. The torque of the motor (36) is the clutch gear (40) → the fixed part (41) → the clutch shaft (35) → the gear (33) → the relay gear (28) → the outer teeth (29) and the inner teeth of the center gear (24). It is transmitted to the outer ring gear (19) of the tightening bolt (11) through the path of the teeth (27).

The torque transmitted to the outer ring gear (19) is
As shown in FIG. 6, a large diameter portion (1) of the tightening bolt (11) is generated by the engaging clutch action of a large number of rollers (15).
The release torque is immediately transmitted to 7). As a result, the tightening bolt (11) is loosened, and the holding plate (10) is released.
Frees the adjusting gear (6).

The phase adjusting operation itself of the adjusting gear (6) is performed by rotating the adjusting gear (6) by a required rotation angle by a motor or a gear with a handle (not shown) in consideration of the paper size. Such an adjusting gear (6)
The means for pivoting the are already well known, and
It is not the subject of the present invention.

After the rotation, in order to couple the adjusting gear (6) to the mounting base (3) and then to the fixed gear (5) again, the motor (36) is operated with the clutch means (32) inserted. Rotate in the opposite direction to. Then, as a result, the center gear (24) and the outer ring (19) are also rotated in the opposite direction. At this time, many rollers (15) no longer transmit torque,
Instead, the tightening torque is transmitted via the preload receiving bearing (20), and the tightening bolt (11) causes the holding plate (1) to move.
Press 0). However, the tightening torque is
Above a certain value defined by 1), the preload bearing (20) slips and the tightening torque is no longer transmitted.

While the normal printing operation is being carried out, and thus the body shaft (2) of the reversing cylinder is also continuously rotated, the fixing portion (41) of the clutch shaft (35) among the various members of the apparatus of the present invention.
However, the load for this driven rotation functions as a locking stopper for the tightening bolt (11).

[0035]

According to the coupling device of the reversing mechanism of the present invention, not only is it completely automated, but the coupling function itself is highly reliable and safe, and a highly completed device can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a coupling device of a reversing mechanism according to the present invention, showing a main part of the device.

FIG. 2 likewise shows a driving means of the apparatus.

FIG. 3 is a sectional view taken along the line III-III in FIG.

4 is a cross-sectional arrow view taken along the line IV-IV in FIG.

FIG. 5 is a sectional view of a single tightening bolt.

FIG. 6 is a cross-sectional view showing the function of the one-way clutch means of the tightening bolt, showing the transmission of release torque.

FIG. 7 is likewise a sectional view showing transmission of tightening torque.

FIG. 8 is a cross-sectional explanatory view showing a conventional technique.

FIG. 9 is a cross-sectional explanatory view showing another conventional technique.

[Explanation of symbols]

 2 Body shaft 3 Mounting base 5 Fixed gear 6 Adjustment gear 8 Drive gear 9 Drive gear 10 Holding plate 11 Tightening bolt 13 Neck part 14 Medium diameter part 15 Roller 16 Rolling surface 17 Large diameter part 18 Retainer 19 Outer ring gear 20 Preload bearing 21 Preload Spring 22 Spring Pressure Adjustment Nut 23 One-way Clutch Means 24 Center Gear 27 Inner Teeth 28 Relay Gear 29 Outer Teeth 32 Clutch Means 35 Clutch Shaft 36 Motor 37 Drive Means

Claims (1)

[Claims] 1. Fixed to the end of the body shaft (2) of the reversing body,
A fixed gear (5) meshing with the downstream drive gear (8),
The adjusting gear (6), which is arranged in parallel with the fixed gear (5) in a state of being rotatable about the body shaft (2) and meshes with the drive gear (9) on the upstream side, and the holding plate (10). A plurality of tightening bolts (11) arranged in a satellite shape around the trunk shaft (2) to fix the adjusting gear (6) integrally with the fixed gear (5). One-way clutch means (2) that absorbs a tightening torque of a certain value or more in the direction, and conversely transmits the release torque as it is in the releasing direction.
3) and internal teeth (27) for transmitting torque to the one-way clutch means (23) of the plurality of tightening bolts (11), which are rotatably supported about the body shaft (2). )
And a center gear (24) integrally having external teeth (29) for receiving torque to itself, and the center gear (24) from a motor (36) outside the reversing cylinder via clutch means (32). Means for transmitting torque to the vehicle (37)
And a reversing mechanism coupling device having.