JP2524812Y2 - Backlash adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a divided plate cylinder of a rotary printing press, wherein a gear interposed between a driving member of the plate cylinder and a member driven by the driving member is provided. The present invention relates to a device for adjusting a backlash and a clearance of a spline.

[Conventional technology]

FIGS. 2 and 3 show a divided plate cylinder for which a patent application is filed as Japanese Patent Application No. 1-249867. The divided plate cylinder 33 is rotatably and axially slidably fitted to a plate cylinder main body 34 having an outer peripheral surface 34a for mounting a plate and a small-diameter cylinder portion 35 of the plate cylinder main body having a smaller diameter than the outer peripheral surface 34a. The shell 36 having an outer peripheral surface 36a on which the plate is mounted is concentrically adjacent to the shell 36 in the axial direction.

Next, the journal 37 on the drive and operation side of the plate cylinder body 34 and
38, bearings 9 and 10 on frames 19 and 20, respectively
And are rotatably supported by fitting portions 19a and 20a with the frames 19 and 20 via bearings 31 and 32 so as to be able to slide in the axial direction. In addition, blanket cylinder 2
The drive helical gear 13 meshing with the helical gear 62 fixed to the drive-side journal 60 of the
7 is engaged in the rotational direction and is slidably supported in the axial direction.

Next, the shell 36 is connected to the hole 38b of the journal 38 by a connecting member (pin) 39 mounted through the hole 38b so as not to be brought into contact with the register 38 in the circumferential and axial directions.
It is connected to. The adjustment shaft 40 is supported by the inner diameter portion 38a of the journal 38 so as to be rotatable and movable in the axial direction.

Further, the inner diameter 41a of the transmission helical gear 41 fixed to the journal 38, which also serves as the driving of the shell 36, is fitted to the journal 38 so as to rotate and move freely in the axial direction with the outer diameter of the adjustment shaft 40. I have. The adjustment helical gear 42 meshing with the transmission helical gear 41
However, it is attached to the adjustment shaft 40 by a spline 42a so as to be immovable in the rotational direction and slidable in the axial direction.

Therefore, the rotation of the helical gear 13 of the plate cylinder body 34 is performed by rotation of the spline 13a, the journal 37, the plate cylinder body 34, the small diameter body 35, the journal 38, the transmission helical gear 41, the adjustment helical gear 42, and the spline 42a. , And transmitted to the shell 36 via the adjustment shaft 40 and the pin 39 (hereinafter referred to as a shell drive system path).

Next, the connection with the circumferential and axial registering devices is as follows. The driving helical gear 13 or the adjusting helical gear 42 is attached to a bracket 43 fixed to the frame 19 or 20 by a key 44 so as to be slidable in the axial direction,
The adjusting member 47 having the screw portion 47a is connected via a bearing 45. Therefore, the adjusting member 47 is screwed with this,
When the sprocket 48 rotatably supported by the bracket 43 is rotated by the circumferential registration device 17v or 17m, the adjusting member 47 moves in the axial direction, and the driving helical gear 13 or the adjusting helical gear 42 is moved. Also move in the axial direction. By this movement, the helical gear 62 of the blanket cylinder 2 or the transmission helical gear 41 of the journal 38 connected to the driving source causes the driving helical gear 13 or the adjusting helical gear 42 to move depending on the torsion angle of the teeth. For rotation, the print drum body 34 and the journal
Since the shell 36 also rotates via the adjusting shaft 40 and the pin 39, the circumferential registration of the plate cylinder body 34 and the shell 36 can be performed individually. However, when the circumferential registration of the plate cylinder body 34 is performed, the journal 37 rotates, so that the shell 36 rotates in the drive system path of the shell, and the shell 36 rotates.
After the circumferential registration of 36, Ciel 36
Is changed by the amount of rotation of the plate cylinder main body 34 (hereinafter, referred to as a circumferential change amount).

Next, screw shafts 51 are attached to the inner diameter portions 37a and 40a of the journal 37 or the adjustment shaft 40 via bearings 50, respectively. Accordingly, by rotating the sprocket 52 screwed to the screw shaft 51 and rotatably supported by the bracket 43 by the axial registering device 18v or 18m, the journal 37 is moved when the screw shaft 51 is moved in the axial direction. Alternatively, since the adjustment shaft 40 also moves in the axial direction, the plate cylinder body 34 or the shell 36 can be separately registered in the axial direction.

However, when registering the plate cylinder body 34 in the axial direction, the journals 37 and 38 moved, and the shell 36 was rotated by the drive system of the shell, and the circumferential registration of the shell 36 was performed. Later, the circumferential direction of the shell 36 is
Is changed by an amount that takes into account the torsion angle of the helical gear 41 (hereinafter referred to as an axial change amount).

By storing the above-mentioned circumferential and axial change amounts in the original circumferential phase of the shell 36 (the registration origin),
An electric correction circuit (pending separately) for correcting the change amount and returning to the original phase in the circumferential direction is provided in a control device (not shown).

The axial registration on the operating side is performed independently without being affected by other registrations as described above.

FIG. 4 shows another divided plate cylinder 3. A shell 6 rotatably and slidably fitted in the axial direction is provided on a small-diameter cylinder portion 5 of the plate cylinder main body 4 of the divided plate cylinder 2. The shell 6 is supported by a frame 20 via a bearing 10. ing. The plate cylinder body 4 and the shell 6 are provided with a gear 13 provided at each shaft end.
14 are driven by gears 15 and 16 of the blanket cylinder 2, respectively. Therefore, the shell 6 is driven by the gear 16 of the blanket cylinder 2 via the gear 14 and the spline 14a.

Next, the circumferential and axial registering devices 17v and 18v and 17m and 18m of the plate cylinder main body 4 and the shell 6 are the same as those shown in FIG. The helical angles of the helical gears 13 and 14 are slid so that circumferential registration is achieved, and a shaft (not shown, similar to the member 51 in FIG. 3) fitted to the support shaft 5b is moved. It is moved in the axial direction to perform axial registration.

[Problems to be solved by the invention]

The above-mentioned prior art has the following problems. If rotation resistance occurs between the outer diameter surface of the small diameter drum portion 35 of the plate cylinder main body and the inner diameter surface of the shell 36, this resistance causes the rotation amount of the registration device 17v in the circumferential direction of the plate cylinder main body 34 to be increased. , Small diameter body part 3
5 and shell 36 rotate together. On the other hand, the electric correction circuit described above recognizes that the shell 36 has started to rotate with the start of the operation of the registering device 17v in the circumferential direction of the plate cylinder main body 34, and returns the shell 36 to the original amount by the amount of rotation. , The register 17m in the circumferential direction of the shell 36 is rotated by the above-mentioned amount of rotation. In this register 17m, the transmission between the transmission helical gear 41 and the adjustment helical gear 42 is adjusted to the clearance. In practice, the shell 36 rotates by the amount of play of the spline 42a between the gear 42 and the adjustment shaft 40. In addition, the actual shell 3 is activated by the operation of the circumferential registration device 17m of the shell 36.
The turning amount of 6 is adjusted by the operation of the register device 17m. Since the helical gear 42 starts to rotate by an amount that takes into account the torsion angle, the amount of the backlash and the amount of play of the spline are reduced.

Therefore, in any of the above cases, the backlash and the spline play influence, and the circumferential registration of the shell 36 cannot be performed accurately.

In the divided plate cylinder 3 shown in FIG. 4, the support shaft of the shell 6 is rotatably supported by the frame 20 via the bearing 10, so that the small-diameter drum portion 5 of the plate cylinder body 4 and the fitting portion of the shell 6 are fitted. In this case, the above-described resistance is further increased, and the shell 6 is entrained around the small-diameter trunk portion 5, and this resistance makes it difficult to register the circumference.

[Means for solving the problem]

1) A journal 38 and a shell provided on the small-diameter trunk 35
A pressurizing mechanism having a spring or the like is provided between the end face 36 and the end face.

2) The spring force can be adjusted considerably more than the resistance interposed between the outer diameter surface of the small diameter barrel portion 35 and the inner diameter surface of the shell 36.

3) Between the support shaft 5a provided on the small-diameter barrel portion 5 of the plate cylinder body 4 of the divided plate cylinder 3 of FIG. Apply. (FIG. 4, black painted portion) [Operation] Even if a rotational resistance occurs between the outer diameter surface of the small diameter drum portion 35 of the plate drum main body and the inner diameter surface of the shell 36, the journal 38 remains in the plate drum main body.
When trying to rotate and move in the axial direction with the circumferential and axial registration devices 17v and 18v of 34, the shell 36 also starts to rotate at the same time as the operation of the electrical correction circuit is started.

〔Example〕

FIG. 1 shows a backlash adjusting device 70 according to the present invention.

Pin receiving seats 72 and 71 are fixed to the ends 38b of the journal 38 and the shell 36 of the divided plate cylinder having the structure shown in FIGS. seat
A spring bar 74 attached to the pin seat 72 via a spring 73 is provided on the pin seat 72 in contact with the spherical surface of the collar 76 attached to the 71, and a spring force is applied to the bolt 75 (by screwing into the pin seat 72). Can be adjusted. Also, the force F when the spring 73 is attached is equal to the outer diameter surface (outer diameter 2r) of the small-diameter trunk portion 35.
The resistance R caused by the fitting or inclination between the inner diameter surface and the inner surface of 36
To overcome enough.

That is, the transmission helical gear 41, the adjustment helical gear 42, the adjustment helical gear 42, and the spline 42a of the adjustment shaft 40 make the transmission helical at the time of registration. In one rotation direction of the gear 41, the journal 38 and the end of the shell 36 are connected in the other rotation direction via a spring as described above, so that there is always a gap between the gears and a clearance between the splines. Is kept constant.

 Next, the operation of the present apparatus will be described.

1) The tooth surfaces of the transmission helical gear 41 and the adjustment helical gear 42 by the spring always abut in one rotational direction. A spline 42a between the adjustment shaft 40 and the adjustment helical gear 42
Also in one direction of rotation. Therefore, in registration, the shell 36 always starts rotating in one rotation direction simultaneously with the rotation of the journal 38 and the axial movement.

2) In the other rotational direction, the spring force is much stronger than the resistance between the outer diameter surface of the small-diameter trunk portion 35 and the inner diameter surface of the shell 36, so that this resistance is always overcome and the rotation of the journal 38 and The shell 36 starts to rotate simultaneously with the axial movement.

As described above, when the circumference of the plate cylinder main body 34 and the axial registration devices 17v and 18v start operating, the shell 36 and the electric correction circuit are simultaneously operated so as to return to the original phase of the shell 36. .

3) Even in the divided plate cylinder shown in FIG. 4, even if resistance occurs between the outer diameter surface of the small diameter drum portion of the plate cylinder main body and the inner diameter surface of the shell, the shell does not rotate, and the circumference and the shaft are smoothly run. The direction can be registered.

[Effect of the invention]

The present invention relates to a plate cylinder body for mounting a plate between a pair of frames of a printing unit provided in a rotary printing press, and a shell which is rotatably and axially slidably fitted to a small diameter cylinder portion of the plate cylinder body. And a pressurizing mechanism having a spring between the journal provided on the small-diameter cylinder of the plate cylinder main body and an end face of the shell, wherein the pressurizing mechanism spring force is provided. Since the resistance generated between the outer peripheral surface of the small-diameter cylinder of the plate cylinder main body and the inner peripheral surface of the shell is made stronger, the spring force is strongly adjusted, so that in one rotation direction, the teeth and the backlash surface are always kept. In the other rotation direction, the resistance is overcome by the spring force, and at the time of registration in the circumferential and axial directions of the plate cylinder main body, the operation of the electric correction circuit acting to return to the original phase is achieved. Rotate the shell at the same time And the actual (mechanical) registration amount of the shell in the circumferential direction exactly matches the registration amount of the shell in the circumferential direction displayed by the electric correction circuit, so that the circumference of the shell is always correct. Directional registration can be performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view perpendicular to the plate cylinder axis of the backlash adjusting device according to the embodiment of the present invention, and corresponds to a cross section XX of FIG. FIG. 2 is a cutaway front view of the operation side of the conventional divided plate cylinder,
FIG. 3 is a cutaway front view of the drive side of FIG. 2, and FIG. 4 is an overall schematic diagram showing another conventional divided plate cylinder. 36… Shell, 38… Operation side journal of plate cylinder body 39… Pin for connecting shell, journal, adjustment shaft 40… Adjustment shaft, 70… Backlash adjustment device (whole) 71, 72… Pin receiver Seat 73 73 Spring 74 Spring bar

Claims (1)

(57) [Scope of request for utility model registration] 1. A plate cylinder body for mounting a plate between a pair of frames of a printing unit provided in a rotary printing press, and a small-diameter cylinder portion of the plate cylinder body slidably and axially slidably fitted thereto. A pressurizing mechanism having a spring between a journal provided on a small-diameter cylinder of the plate cylinder main body and an end face of the shell. A backlash adjusting device, characterized in that the force is made stronger than the resistance generated between the outer peripheral surface of the small diameter cylinder of the plate cylinder main body and the inner diameter surface of the shell.