JPH0536636Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a cutting method for the saw barrel of a folding machine attached to a newspaper rotary press, which is used when switching between straight folding and collect folding and when adjusting the cut-off amount. Regarding the length adjustment mechanism.

[Conventional technology]

4 to 7 are for explaining the conventional technology. FIG. 4 is a layout diagram of the main parts of a folding machine and a sheet discharge device, and FIG. 5 is a sectional view of a saw body of a folding machine. , FIG. 6 is an explanatory diagram of the paper cutting process, and FIG. 7 shows the dimensions of the paper cut by the cutting process of FIG. 6.

In Fig. 4, 01 is a nipping roller, 0
2 is a saw cylinder, 03 is a folding cylinder, 04 is a folding roller, 05
is an impeller, 06 is a conveyor belt, and saw cylinder 0
2 is provided with a pair of saw blade devices 07, and the folding drum 03 is provided with three sets of needle devices 08 and a pair of folding blades 09.

The explanatory diagram of the paper cutting process in Figure 6 shows the case of two-sheet folding (collect folding).
In order of c and d, the circumferential angle of the saw cylinder 02 is 180 degrees, the folding cylinder 03 is 120 degrees, cutting the paper,
It is shown together with the overlapping and folding situations. In the case of double folding, the cut edge of the outer paper is S ₁ at the starting edge and the ending edge of the inner paper of the folding cylinder 03.
And only S ₂ is wrapped to prevent cutting into two pieces. This is because cutting into two pieces puts a strain on the saw blade, resulting in uneven cuts or tears. In this lapping operation, the mutual overlap amount is usually determined so that S ₁ =S ₂ , and the difference in length between paper A and paper B is about 6 mm.

In order to provide a difference in the cutoff amount between paper A and paper B, the pair of saw blades on the saw barrel are designed so that the saw blades are aligned with respect to the center line X-X of the saw barrel, as shown in Figure 6C. The mounting must be offset by X and X, respectively.

Note that if the paper is cut without performing the offset operation when folding two sheets, the cut portions of paper A and B will be uneven as described above, which is not aesthetically pleasing. It should be kept to the minimum size that will cut the outer B paper without any problem.

Therefore, means for adjusting the amount of wrap have been used in the past. Furthermore, in the conventional apparatus shown in FIG. 4, when two sheets are not stacked, that is, when straight folding is performed, this offset operation is not necessary, so that all sheets to be cut must be of the same length.

Based on such requirements, the devices shown in FIGS. 4 and 5 have been used in the past. In FIG. 5, the saw blade device 07 has a width dimension A from the center line of the saw barrel 02.
and B, stored in a groove 07g with a depth W from the outer periphery, saw blade 010, saw blade retainer 011a, 011b,
It consists of saw blade cases 012a, 012b, springs 013, spacers 014, wedges 016, and wedge fixing bolts 017.

Therefore, the cutoff change (adjustment) procedure for paper A and paper B will be described as follows.

(1) Remove the wedge fixing bolt 017 and remove the wedge 0
The wedge 016 is removed from the barrel body using the jack hole (not shown) machined in the hole 16.

(2) Remove the spacer 014 connected to the wedge 016 and insert it into the 015 surface.

(3) The thickness of the spacer 014 is x, and a wrap difference is created by replacing the 014 spacer.

(4) Attach wedge 016 to its original position.

(5) Perform the same procedure for the wedge device 07 on the opposite side.

(6) Although the spacer 014 is approximately 3 mm thick, it is necessary to prepare several types of spacers with different thicknesses in order to adjust the optimal amount of wrap.

[The problem that the idea attempts to solve]

1. When switching between straight folding and collect folding (two-sheet folding), it is necessary to change the cutoff amount of the saw blade device, and currently this is done manually and takes about 5 minutes. This does not meet current needs, which require computer-controlled presetting.

2. With the current method, if the saw blade holder and the saw blade case are not supported when replacing the spacer, there is a risk of the spacer falling, which poses a safety management problem.

3. Since the cutoff lengths of paper A and paper B can only be adjusted with spacers, several types of spacers must be prepared in order to obtain the minimum dimension to prevent double cutting, which is wasteful. Furthermore, a large number of spacers are required to obtain the optimum cutoff amount for collect folds of different paper quality and page numbers.

4. The technical objective of the present invention is to realize a device that can automatically adjust the cutoff length without manual effort and steplessly without using a spacer.

[Means to solve the problem]

(1) The saw barrel is a double cylinder consisting of an outer cylinder and an inner cylinder, and one saw blade of a pair of saw blades is supported by the saw cylinder outer cylinder, and the other saw blade is supported by the saw cylinder inner cylinder. However, the phase (offset amount) between the outer cylinder and the inner cylinder can be adjusted.

(2) In order to adjust the phase between the outer cylinder and the inner cylinder, a push-pull rod is passed through the inside of the inner cylinder of the saw cylinder, and the axial movement of the push-pull rod causes the meshing of helical gears on both sides of the saw cylinder. The outer cylinder and the inner cylinder are rotated in opposite directions through the screws.

[Effect]

By pushing or pulling the push-pull rod, the phase between the outer cylinder and the inner cylinder increases, and by pulling or pushing the push-pull rod, the phase between the outer cylinder and the inner cylinder decreases.

By making the helical gears in the phase adjustment mechanism have the same module, number of teeth, and helix angle, the same amount of phase adjustment is performed on the saw blades of the outer cylinder and the saw blades of the inner cylinder.

〔Example〕

In FIGS. 1 and 2, 10 is a saw blade, 20 is an outer barrel of the saw barrel, 21 is an inner barrel of the saw barrel, 22 is an external helical gear, 23 is a helical gear of the saw barrel, and 24 is the outer barrel of the saw barrel. Cylinder extension shaft, 25 is a key, 26 is a push/pull device, 35 is a push/pull bar, 39 is a helical gear for the inner cylinder, 40 is a key, 4
2 is a helical gear for the outer cylinder, 43 is an outer cylinder extension shaft, 47
is an integral compound gear, and 48 is a support shaft.

A saw barrel outer cylinder 20 that supports one of the pair of saw blades 10 , 10 has the saw blade 10 fixed by a saw blade retainer 11 , a saw blade case 12 , and a saw blade holder 13 .

A saw cylinder inner cylinder 21 that is inserted into the saw cylinder outer cylinder 20 and supports the other saw blade 10 fixes the saw blade 10 by a saw blade retainer 11, a saw blade case 12, and a saw blade holder 14.

The external helical gear 22 for driving the saw barrel on the folding machine drive side has a right-handed helix and transmits power from the drive source.

The saw barrel helical gear 23 that meshes with this gear has a left-handed helix, and is mounted on a drive-side extension shaft 24 that is coaxially connected to the saw barrel outer cylinder 20 with bolts, and is fitted with a key 25 or a spline so that it can slide in the axial direction. It's stopped.

The push/pull device 26 pushes and pulls the saw barrel helical gear 23 in its axial direction to change the phase angle of the saw barrel outer cylinder 20 with respect to the saw barrel driving external helical gear 22.
It looks like this: A female screw rotating body 29 driven by a chain 28 from a reduction motor 27 which is rotated forward and backward by push button operation is supported by bearings 30 and is rotatable, but is attached to a machine frame member 31 without play in the axial direction. Its inner hole is female thread 2
It is a 9t movement screw.

A male threaded portion 32t of a male threaded rod 32 is inserted into this female threaded rotating body 29, and a corner portion 32a at the tip is inserted into a square hole of a stop plate 33 to prevent rotation. Therefore, the forward and reverse rotation of the female threaded rotating body 29 is transmitted to the collar 32c as a push/pull motion of the male threaded rod 32, and is transmitted to the shifter 34 via the thrust bearings 33, 33. Since the shifter 34 and the saw barrel helical gear 23 are fastened together with bolts, the function of the push/pull device 26 for the saw barrel helical gear 23 is fulfilled.

The push/pull amount of the saw barrel helical gear 23 is determined by the saw barrel inner cylinder 21.
The push/pull rod 35, which passes through the axial center hole and transmits the information to the folding machine operation side, has a flange portion 35f fastened to the shifter 34 with bolts.

A collar 36 is provided on the operation side so as to be movable in the axial direction according to the amount of push and pull of the push and pull rod 35.
A shifter 38 is provided via thrust bearings 37, 37, and an inner cylinder helical gear 39 is fastened to this shifter 38 with bolts. and shifter 38
is fixed to the extension shaft 21s of the saw barrel inner cylinder 21 by a key 40 or a spline so that it can freely slide on the extension shaft 21s. The helical gear 39 for the inner cylinder has the same module, number of teeth, and helix angle as the saw barrel helical gear 23, and the helical gear 39 has the same twist direction as the saw barrel helical gear 23.

The helical gear 39 for the inner cylinder is connected to the helical gear 42 for the outer cylinder via the shifter 38 and the stopper ring 41.
The helical gear 42 for the outer cylinder is constrained only in the axial direction and moves integrally without play, but is allowed to rotate freely in the rotational direction.
A key 44 or a spline is fixed on the operation side extension shaft 43 of the 0, so that it can freely slide on the extension shaft 43. The helical gear 42 for the outer cylinder is also the helical gear 2 for the saw barrel.
3 and the same module, number of teeth, and helix angle, and the helix direction is to the left.

Helical gear 39 for inner cylinder and helical gear 42 for outer cylinder
The only difference is the twist direction, but the module, number of teeth,
The left helix gear 45 and the right helix gear 46 which have the same helix angle and mesh with these numbers of teeth at the same time,
Both gears have the same module, number of teeth, and helix angle, and these two gears form an integral compound gear 47, whose support shaft 48 is fixed to the machine frame member and connects the compound gear via bearings 49, 49. 47 can be rotated freely in the axial direction without play.

50, 50 is the driving side saw barrel main bearing; 51,
Reference numeral 51 denotes a saw barrel main bearing on the operation side.

The above is the configuration of the embodiment of the present invention, and its operation will be described next.

For convenience of explanation below, in Figure 1, the driving side is referred to as the left side, and the operating side is referred to as the right side, and the rotation (rotation) of various parts
The direction shall be viewed from the drive side toward the operation side.
Clockwise rotation is referred to as right rotation, and counterclockwise rotation is referred to as left rotation.

A When pushing the male threaded rod 32 of the push-pull device 26 to the right: 1. The saw barrel helical gear 23 produces a counterclockwise displacement relative to the static phase of the saw barrel driving external helical gear 22. As a result, in FIG. 2, the saw blade 10 of the saw barrel outer cylinder 20 is displaced (offset) in the counterclockwise direction (in the direction of arrow p).

2 Saw barrel helical gear 23 and outer cylinder helical gear 4
2 are keyed on the driving side extension shaft 24 and the operation side extension shaft 43 of the saw barrel outer cylinder 20, respectively,
Moreover, shifter 34, push/pull rod 35, shifter 3
8, the same spacing is always maintained in the left and right direction without play. Therefore, if the saw cylinder driving external helical gear 22 is in a stationary phase with respect to the saw cylinder helical gear 23, the external cylinder driving helical gear 42
On the other hand, the right-handed helical gear 46 of the integral compound gear 47 is in a stationary phase together with the left-handed helical gear 45.

3 For this reason, when the helical gear 39 for the inner cylinder is pushed to the right, a clockwise displacement occurs, and in FIG. ) is given.

B When pulling the male threaded rod 32 of the push/pull device 26 to the left, the procedure is the reverse of 1 A, and the saw barrel outer cylinder 20
and each saw blade 10 of the saw barrel inner cylinder 21,
10 is given a displacement (offset) in the direction opposite to the arrows p and q.

The outline of the action is as above, but the gear 23,
39 and 42 all have the same module, number of teeth, and helix angle, so the displacement amount of the saw blade 10 on the saw cylinder outer cylinder 20 and the saw blade 10 on the saw cylinder inner cylinder 21 is always the same, Moreover, it has the advantage that it can be adjusted steplessly in direct proportion to the amount of push and pull of the push-pull device 26.

The twisting direction of each gear should be the same as that of the gears (23 and 42) and the opposite direction of the gear 39.
As an example, the twisting direction of each gear may be given as shown in FIG. That is, the left-handed helical gear 22' for the left-handed helical helical gear, the helical gear 23' for the right-handed saw barrel, the helical gear 42' for the right-handed outer barrel, the helical gear 39' for the left-handed inner barrel, and the integral type. A right-handed helical gear 45' and a left-handed helical gear 46' form a compound gear. However, in this case, the direction of displacement of the saw cylinder outer cylinder 20 and the saw cylinder inner cylinder 21 with respect to the push/pull behavior of the push/pull device 26 is opposite to that in FIG. 1.

[Effect of idea]

A saw barrel having a pair of saw blades is made into a double cylinder of an outer cylinder and an inner cylinder, one saw blade is attached to the outer cylinder of the saw cylinder, the other saw blade is attached to the inner cylinder of the saw cylinder, and the outer cylinder of the saw cylinder is attached. a saw barrel helical gear slidably provided on the drive side extension shaft in the axial direction; an external helical gear for driving the saw barrel that meshes with the saw barrel helical gear; A push-pull rod that is fixed to the gear and extends toward the operation side through the axial center hole of the saw barrel inner cylinder, and an outer cylinder that is slidably provided in the axial direction on the operation side extension shaft of the saw cylinder outer cylinder. Helical gear and
an internal helical gear that is rotatable with respect to the helical gear for the outer cylinder and that is mounted at a constant interval on the operation side of the push/pull bar; the helical gear for the external cylinder; and the internal cylinder. The saw barrel helical gear, the internal helical gear, and the external helical gear have the same module, number of teeth, and helix angle. In addition, the helical gear for the inner cylinder and the helical gear for the outer cylinder are twisted in opposite directions, and the saw cylinder inner cylinder and saw cylinder outer cylinder move in opposite directions in response to the axial movement of the push/pull rod. By making it rotate, the following effects are produced: 1. Conventionally, liner adjustment was done manually, which took at least 5 minutes, and there were also problems with work safety management, but with the present invention, Approximately 10 depending on implementation
Adjustments can be made in about seconds.

2. It is safe because there is no need to enter the folding machine and push buttons can be operated.

3 Cutoff length can be adjusted steplessly.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an embodiment of the present invention, Fig. 2 is a YY sectional view of Fig. 1, and Fig. 3 is an external view of each gear in the torsional direction of another embodiment of the invention. . Fourth
7 to 7 are explanatory diagrams of the prior art, and the fourth
The figure is a layout diagram of the main parts of the folding machine and paper ejecting device, Figure 5 is a sectional view of the folding machine saw barrel, Figure 6 is an explanatory diagram of the paper cutting process, and Figure 7 is the paper cut by the cutting process shown in Figure 6. Indicates paper dimensions. 10...Saw blade, 20...Saw barrel outer cylinder, 21...Saw barrel inner cylinder, 22...External helical gear, 23...Saw barrel helical gear, 24...Saw barrel outer cylinder extension shaft , 26...
Push/pull device, 35... Push/pull rod, 39... Helical gear for inner cylinder, 42... Helical gear for outer cylinder, 43...
...External cylinder extension shaft, 47...Integrated compound gear.

Claims (1)

[Scope of utility model registration request] In a folding machine saw barrel provided with a pair of saw blades, the saw barrel has a double body of an outer barrel and an inner barrel, and one saw blade is attached to the outer barrel of the saw barrel and the other saw blade is attached to the inner barrel of the saw barrel. , a saw barrel helical gear slidably provided in the axial direction on the drive side extension shaft of the saw barrel outer cylinder, and an external helical gear for driving the saw barrel that meshes with the saw barrel helical gear. , a push-pull rod fixed to the helical gear of the saw barrel and extending toward the operating side through the axial center hole of the saw barrel inner cylinder, and slidable in the axial direction on the operating side extension shaft of the saw barrel outer cylinder. a helical gear for an external cylinder, which is rotatable with respect to the helical gear for an external cylinder, and a helical gear for internal teeth that is installed at a constant interval on the operation side of the push/pull bar. and an integral compound gear that meshes with the helical gear for the outer cylinder and the helical gear for the inner cylinder at the same time, and the helical gear for the saw barrel, the helical gear for the internal gear, and the helical gear for the outer cylinder are provided. The module, number of teeth, and helix angle of the helical gears are the same, and the helical gears for the inner cylinder and the helical gear for the outer cylinder have opposite torsion directions, so as to correspond to the axial movement of the push/pull rod. A cutting length adjustment mechanism in a saw barrel of a folding machine, characterized in that an inner cylinder and an outer cylinder of the saw cylinder rotate in opposite directions.