JPH052314Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a rotary shear for a corrugating machine that is incorporated into a corrugated sheet production line.

[Conventional technology]

Generally, in a corrugated machine for manufacturing corrugated sheets, as shown in FIG.
A rotary shear 51, a first slitter and a
A scorer 52, a second slitter/scorer 53, and a rotary cutter 54 are provided in this order, and the first slitter/scorer 52 cuts the corrugated cardboard sheet S to the required width dimension, cuts a cutting line, and then cuts the corrugated cardboard sheet S to the rotary cutter 54. It is cut to the required length. At this time, the second Slitsuta scorer 5
No. 3 is on standby for the next sheet to be formed due to order change.

When cutting with the rotary cutter 54, if there is slack in the corrugated sheet S, the corrugated sheet S cannot be cut to a predetermined length.
Normally, the moving speed of the sheet transport conveyor 55 provided upstream of the rotary cutter 54 is controlled by the corrugated cardboard sheet S sent out by the double facer 50.
The moving speed of the corrugated paperboard sheet S is slightly higher than that of the sheet transport conveyor 55, and the corrugated paperboard sheet S is moved by being pulled by contact with the sheet transport conveyor 55.

In the above-mentioned corrugating machine, when there is a change in the order of the corrugated board sheet S, the slitter 5 whose position is adjusted in advance in the width direction of the sheet according to the size of the sheet to be formed next and the desired processing.
6 and a scorer 57 on standby.
The processing position of the sheet is changed using the slitter/scorer 53, but after adjusting the positions of the slitter 56 and scorer 57, for example, the upper and lower blades of the slitter are aligned while the corrugated sheet is continuously flowing. Then, as shown in FIG.
The side edges of the paper are jammed, making it impossible to completely cut the cardboard sheet.

In order to solve such problems, normally the continuously flowing corrugated cardboard sheets are cut in the width direction by the rotary shear 51 provided upstream of the slitter/scorer. By cutting in the width direction, at the start of slitting, in which the upper and lower blades of the slitter 56 are brought together, the slitter blades face perpendicularly to the cut edge of the corrugated cardboard sheet, so the corrugated sheet is smoothly cut away from the cut edge. This will prevent the side edges of the corrugated cardboard sheet from getting caught as shown in FIG.

As shown in FIG. 4, as the rotary shear 51, a knife 41 extending over the entire width is provided on the outer periphery of the knife cylinder 40, and the knife 41 is inserted into the elastic body 43 lined on the outer periphery of the ambili cylinder 42 to cut the corrugated cardboard sheet S. Conventionally, the rotary shear 51 is configured to completely cut the corrugated paperboard sheet S across the width direction, so the cut-off preceding corrugated sheet S is Sheet transport conveyor 55 moving at a speed faster than the sheet speed
Since the material is transported at a transport speed of 1, there is a problem in that the cutting dimensional accuracy during cut-off with a rotary cutter is reduced.

JP-A-59-134696 describes a rotary shear in which the knife of a knife cylinder is divided into three parts in the width direction, and the knives on both sides and the central knife can be rotated independently or simultaneously.

In the rotary shear mentioned above, by rotating only the knives on both sides independently, it is possible to partially cut both sides of the corrugated sheet, so the corrugated sheet is not separated, and the cutting dimensional accuracy when cutting off with the rotary cutter is improved. can be achieved. Furthermore, by partially cutting both sides of the corrugated paperboard sheet, when slitting the upper and lower blades of the slitter 56 are aligned, the upper and lower blades face perpendicularly to the partially cut edge. The cut is made smoothly from the cut edge, and the sheet side edges are prevented from being caught as shown in FIG.

[The problem that the idea aims to solve]

By the way, the rotary shear described in the above-mentioned publication was developed for a corrugate machine, in which the rotary cutters 54 shown in FIG. However, when this method is adopted for a corrugating machine as shown in FIG. 5, which is provided with a single rotary cutter 54, the following problems occur.

In other words, if the width of the corrugated sheet is smaller than the width of the central blade, it will not be possible to partially cut the corrugated sheet, and if the width of the central blade is made smaller, the width of the blades on both sides will become longer and the sheet will When cutting a portion of a corrugated cardboard sheet with a large width, the blades on both sides must be moved significantly, resulting in a problem that the machine width of this portion becomes extremely large.

Further, in the rotary shear, since the knives on both sides and the knife in the center are rotated independently or simultaneously, there is a problem that the configuration and control are extremely complicated.

In view of the above points, this invention is most suitable for the corrugating machine shown in Fig. 5, and is capable of improving cutting dimensional accuracy when cutting off with a rotary cutter, as well as perfectly aligning the blades of the slitter. The purpose of the present invention is to provide a rotary shear with an extremely simple structure that enables the following.

[Means to solve the problem]

In order to achieve the above object, this invention includes a knife cylinder with a knife integrally provided over the entire width on the outer periphery, and a pair of coaxial cylinders whose outer periphery is lined with an elastic body to receive both ends of the knife. The above-mentioned anvil cylinder is provided to face the transport path of the corrugated paperboard sheet, and a moving mechanism is provided to move the pair of anvil cylinders in the axial direction.

[Effect]

With the above configuration, the corrugated cardboard sheet can be partially cut at the position where the knife of the knife cylinder bites into the elastic bodies of the pair of anvil cylinders.

Therefore, by adjusting the position of a pair of anvil cylinders according to the width dimension of the corrugated sheet and placing them on both sides of the corrugated sheet, and in this state, rotating the knife cylinder and anvil cylinder in the direction of movement of the corrugated sheet, the corrugated Both sides of the sheet can be partially cut.

〔Example〕

Embodiments of this invention will be described below with reference to FIGS. 1 to 3.

As shown in FIGS. 1 and 2, shafts 2 at both ends of a knife cylinder 1, which is provided to face the transport path of the corrugated cardboard sheet S, are supported by a pair of frames 4, 4 via bearings 3. . A knife 5 is integrally attached to the outer periphery of the knife cylinder 1 over its entire width.

Furthermore, among the shafts 2 at both ends of the knife cylinder 1,
A gear 6, a clutch 7, and a sprocket 8 are attached to one shaft 2, and the rotation of a line shaft (not shown) is transmitted to the sprocket 8.

Rotating shaft 10 located below the knife cylinder 1
is supported by the frame 4 via a bearing 11, and a gear 12 attached to its end meshes with the gear 6 of the knife cylinder 1.

A pair of anvil cylinders 13, 13 are fitted on the outside of the rotating shaft 10. This anvil cylinder 13 is prevented from rotating relative to the rotating shaft 10 and is supported so as to be slidable in the axial direction.

In the case of the embodiment, an axially long key groove 14 is provided on the outer periphery of the rotating shaft 10, while the anvil cylinder 1
Although a key (not shown) is attached to the rotary shaft 10, the rotating shaft 10 may be a spline shaft, and the anvil cylinder 13 may be spline-coupled to the spline shaft.

The outer periphery of the anvil cylinder 13 is lined with an elastic body 15 made of urethane rubber or the like, which serves as a receiver for both ends of the knife 5 . This anvil cylinder 13 is moved in the axial direction of the rotating shaft 10 by the operation of the moving device 20.

Although any mechanism can be adopted as the moving device 20, here, a threaded rod 22 rotated by a motor 21 is passed between a pair of frames 4, and a nut 23 is threadedly engaged with the threaded rod 22. is attached to the shifter 24, and a bifurcated portion at the tip of the shifter 24 is engaged with an engagement groove 25 provided at the end of the anvil cylinder 13.

In this case, the pair of anvil cylinders 13 may be moved independently as shown in the figure, or the threaded rod may be formed with a reverse thread,
A pair of nuts threadably engaged with each screw may be attached to each shifter so that the shifters can be moved symmetrically.

The rotary shear shown in the embodiment has the above-mentioned structure, and the rotary shear is operated by the knife cylinder 1 and the anvil cylinder 13 by the operation of the clutch 7.
is rotated to partially cut the corrugated cardboard sheet S passed between the cylinders 1 and 13.

In this case, the knife cylinder 1 is stopped with the knife 5 positioned at the upper part of its outer periphery, and the knife cylinder 1 is rotated once when cutting the corrugated cardboard sheet S.

Now, when the knife cylinder 1 and the pair of anvil cylinders 13 are rotated once by operating the clutch 7, the corrugated cardboard sheet S is partially cut at the position where the knife 5 of the knife cylinder 1 bites into the elastic body 15 of the pair of anvil cylinders 13. It can be cut exactly.

Therefore, by adjusting the position of the pair of anvil cylinders 13 according to the width dimension of the corrugated sheet S and making them face each other on both sides of the corrugated sheet S, the rotation of the knife cylinder 1 and the pair of anvil cylinders 13 allows the corrugated sheet S to be both ends,
It can be partially cut as shown in FIG.
30 indicates the cut portion.

〔effect〕

As described above, according to this invention, by rotating the knife cylinder and the anvil cylinder with the pair of anvil cylinders facing each other on both sides of the corrugated sheet, it is possible to partially cut both sides of the corrugated sheet.

Therefore, if there is a change in the order of corrugated sheets manufactured by a corrugated machine,
By partially cutting the corrugated sheet with a rotary shear, the leading corrugated sheet and the trailing corrugated sheet are fed in a connected state, which prevents the cutting dimensional accuracy from decreasing when cutting off with the rotary cutter. In addition, by partially cutting the corrugated cardboard sheet, the blades of the slitter can be reliably aligned after position adjustment.

In addition, when partially cutting a corrugated sheet, the position is adjusted by moving a pair of anvil cylinders in the axial direction according to the width of the corrugated sheet.
Control is extremely easy.

Furthermore, it has a simple structure in which a pair of anvil cylinders are provided below the knife cylinder, and the anvil cylinders are moved by a moving device, so assembly is easy. In order to receive the
Even when the size of the corrugated cardboard sheet is changed to a wider width, there is no need to move the anvil cylinder significantly.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the rotary shear according to the invention, FIG. 2 is a longitudinal sectional side view of the same, FIG. 3 is a perspective view of a corrugated cardboard sheet partially cut using the same rotary shear, and FIG. FIG. 4 is a perspective view showing a conventional rotary shear, FIG. 5 is a schematic view of a corrugating machine, and FIG. 6 is a view showing a state in which the slitting blades are aligned. 1...Knife cylinder, 13...Anvil cylinder, 20...Movement device.

Claims (1)

[Scope of utility model registration request] A knife cylinder integrally provided with a knife over the entire width on the outer periphery, and a pair of coaxially arranged anvil cylinders whose outer periphery is lined with an elastic body to receive both ends of the knife are placed in the conveying path of the corrugated cardboard sheet. A rotary shear that is provided facing each other and includes a moving mechanism that moves the pair of anvil cylinders in the axial direction.