JPH0634096Y2 - Corrugated board manufacturing equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a corrugated fiberboard sheet manufacturing apparatus for continuously forming a unit sheet of a set length which is a blank for forming a corrugated fiberboard box from a continuous corrugated fiberboard web. It is a thing.

[Conventional technology]

FIG. 2 shows a conventional example of the above manufacturing apparatus. In this manufacturing apparatus, a first slitter scorer 21 and a second slitter scorer 22 are provided in the transfer path of the corrugated board web S sent from the double facer 20, and the corrugated board web S is cut into a required width dimension by one slitter scorer. , The corrugated board web S is continuously cut in the width direction by the rotary cutter 23 to form the unit sheet S'of the set length, and the unit sheet S'is conveyed by the conveyor device 24. Is ejected by.

Further, a measuring roll 25 and a rotary shear 26 for detecting the moving length of the corrugated board web S are provided between the double facer 20 and the first slitter / scorer 21, and the moving length of the corrugated board web S corresponds to one lot. When the measuring roll 25 detects that the length has reached the specified length, the drive device of the rotary shear 26 is controlled based on the detection signal to cut the corrugated board web S in the width direction and cut it in the length direction. ing.

Here, when the rotary shear 26 cuts the corrugated board web S into a dimension corresponding to the length of one lot as described above when a lot change occurs, the tip end of the corrugated board web S at the initial manufacturing stage is also used. The rotary cutter 23 does not have the function of continuously cutting the corrugated board web S to the set length to form the unit sheet S ', as in the rotary cutter 23.

The length of the corrugated board web S for one lot formed by cutting the rotary shear 26 is 60 m at the minimum.
The longest one is about 10,000 meters. On the other hand, the length of the unit sheet S'formed by cutting by the rotary cutter 23 is based on the size of the cardboard box to be finally formed, and is about 0.5 m at the minimum and about 3 m at the maximum.

[Problems to be solved by the device]

By the way, in the above-mentioned conventional manufacturing apparatus, the first slitter scorer provided in the transfer direction of the corrugated board web S is used.
When either one of the 21 and the second slitter scorer 22 is used, the upper and lower blades of the other slitter scorer are adjusted in position according to the size of the unit sheet S ′ to be produced next, and a plurality of lots for one lot are adjusted. When the unit sheet S'is produced, the upper and lower blades of the one slitter / scorer that are in use are opened, and the upper and lower blades of the other slitter / scorer are combined to make the first slitter / scorer 21 and the second slitter / scorer 21. Slitter scorer
Since 22 is switched and used, there is a problem that a large amount of loss occurs in the corrugated board web when the slitter / scorer is switched.

That is, the time required to switch the slitter-scorers 21, 22 is a very short time of about several seconds, but the moving speed of the corrugated board web S is extremely high. The amount of movement of the corrugated board web S is large, and the amount of movement is lost.

For example, if the moving speed of the corrugated board web S is 200 m / min and the time required to switch the slitter / scorer 21 and 22 is 1 second, the loss of the corrugated board web S reaches 3.3 m. If the production length per lot is 60 m, the loss rate will be 5.5%, which is extremely high.

In recent years, since the unit sheet S'is produced in a large variety of small lots, it is necessary to frequently switch the slitter / scorer, and each time the switching is performed, the corrugated board web S suffers a loss as shown by the above numerical value. Therefore, a lot of losses occur.

In addition, since it is not possible to obtain the desired regular unit sheet when switching the slitter / scorer, it is necessary to prevent this unit sheet from being transported to the slitter / scorer or later and loaded with the regular unit sheet. Then, during the waiting time due to the switching of the slitter / scorer, the corrugated cardboard web S is randomly and finely cut by the rotary shear 26, and the guide guide provided on the downstream side of the rotary shear 26.
The 27 is rocked downward so that the cutting chips of random size are dropped downward, and the cutting chips cause the above loss.

This invention has a technical object to reduce the loss of corrugated cardboard sheets at the time of lot change, which requires switching of the slitter / scorer.

[Means for Solving the Problems]

In order to solve the above problems, in the present invention, in a transfer path of a corrugated cardboard web sent from a double facer, a rotary cutter that continuously cuts the corrugated cardboard web in the width direction to form a unit sheet of a set length. , A carry-out conveyor for carrying the unit sheet discharged from the rotary cutter to the downstream side, and a unit sheet sent out from the carry-out conveyor by switching to an upper transfer path and a lower transfer path provided in two upper and lower stages A sorting conveyor is provided, and a horizontal aligning conveyor that receives the unit sheets sent from the sorting conveyor and conveys them forward while guiding both side edges of the unit sheet in each of the upper transport path and the lower transport path, and the horizontal align conveyor. A slitter score that cuts the unit sheet sent from the machine to the required width and puts a ruled line And it provided a discharge conveyor device unit sheet fed from the slitter-scorer,
The sheet conveying speed of the carry-out conveyor and the sorting conveyor is set higher than the traveling speed of the corrugated cardboard web.

[Action]

The manufacturing apparatus having the above-mentioned configuration forms a unit sheet by continuously cutting the corrugated cardboard web fed from the double facer to a predetermined length by a rotary cutter, and then the unit sheet is fed by a carry-out conveyor, a sorting conveyor and a horizontal aligning conveyor. It is sent to a slitter / scorer, cut into a required width dimension, and subjected to scoring, and the processed unit sheet is carried out by a discharge conveyor device.

When manufacturing the unit sheet as described above, adjust the positions of the upper and lower blades according to the unit sheet to be manufactured next with the other slitter / scorer, and align the upper and lower blades so that they can be cut. deep.

When a unit sheet for one lot is formed and the last unit sheet passes through the sorting conveyor, the sorting conveyor is instantly swung to switch the unit sheet transfer path, and the unit sheet sent next is sent. Is sent to the slitter / scorer after position adjustment to cut it to the required width and to perform scoring.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1 of the accompanying drawings.

As shown in the figure, a sheet guide 2 for guiding the movement of the corrugated board web S is provided in the transfer path of the corrugated board web S fed from the double facer 1. The measuring roll 3 provided on the sheet guide 2 rotates upon contact with the corrugated board web S to detect the amount of movement of the corrugated board web S.

A rotary cutter 4 is provided on the downstream side of the measuring ring 3. The rotary cutter 4 is composed of a pair of upper and lower rolls 4a and 4b each having a cutting blade that is long in the axial direction on the outer circumference, and the rotation speeds of the rolls 4a and 4b are controlled based on the detection signal from the measuring roll 3. The corrugated cardboard web S that penetrates between the rolls 4a and 4b is cut into a predetermined length to form a unit sheet S '.

On the upstream side of the rotary cutter 4, there is provided a carry-in conveyor 5 that conveys the corrugated paperboard web S toward the rotary cutter 4 while adsorbing it. Further, a carry-out conveyor 6 is provided downstream of the rotary cutter 4 for carrying out the cut unit sheet S ′ to the downstream side in a suction state.
The carry-out conveyor 6 conveys the unit sheet S ′ at a speed slightly higher than the traveling speed of the corrugated board web S.

A distribution conveyor 7 is connected to the downstream side of the carry-out conveyor 6. The distribution conveyor 7 is set to be faster than the speed of the carry-out conveyor 6, and is supported so as to be swingable around the end on the sheet receiving side, and unit sheets S ′ fed from the carry-out conveyor 6 are provided in two upper and lower stages. Transport to one of the transfer paths.

A horizontal alignment conveyor 8, a slitter / scorer 9, and a discharge conveyor device 10 are sequentially provided in the upper transfer path and the lower transfer path provided on the downstream side of the sorting conveyor 7 in the transfer direction of the unit sheet S ′. There is.

The horizontal aligning conveyor 8 conveys the unit sheet S ′ fed from the sorting conveyor 7 toward the slitter / scorer 9. In order to prevent the unit sheet S ′ from meandering during the transportation, side edge guides (not shown) for guiding the movement of both side edges of the unit sheet S ′ can be laterally adjusted on the horizontal alignment conveyor 8. It is provided in.

The slitter / scorer 9 comprises a pair of upper and lower slitter rolls 11 for cutting the unit sheet S ′ into a required width dimension and a pair of upper and lower ruler rolls 12 for scoring the unit sheet S ′. Each of the pair of scoring rolls 12 is provided so as to come into contact with and separate from each other in the vertical direction.

The discharge conveyor device 10 has a structure in which a stacker conveyor 14 is connected to a suction conveyor 13 that sucks and conveys a unit sheet S '.

Now, when the corrugated board web S is sent out from the double facer 1, the corrugated board web S is moved by the rotary cutter 4
Is cut into a predetermined length, and unit sheets S ′ having a predetermined length are sequentially formed.

The unit sheet S ′ is sent to the sorting conveyor 7 by the carry-out conveyor 6. When the sorting conveyor 7 is connected to the upper transfer path, the sorting conveyor 7
The unit sheet S ′ sent to the upper side is sent to the horizontal aligning conveyor 8 in the upper transfer path and conveyed to the slitter / scorer 9.

The unit sheet S ′ is cut into a required width dimension by the slitter / scorer 9 and subjected to scoring. The processed unit sheet S ′ is carried out by the discharge conveyor device 10.

At the time of manufacturing the unit sheet S'as described above, the slitter / scorer 9 provided in the lower transfer path is provided with a pair of upper and lower slitter rolls 11 and a pair of upper and lower depending on the size of the unit sheet to be manufactured next and desired processing. The position of the scoring roll 12 is adjusted, the pair of upper and lower slitter rolls 11 are aligned with each other, and the pair of upper and lower scoring rolls 12 can be processed.

When the corrugated board web S having a length corresponding to one lot is sent to the rotary cutter 4, the rotary cutter 4 is instantaneously controlled in its rotation speed according to the length of the unit sheet to be manufactured next, and is fed. The corrugated board web S to be cut is continuously cut.

At this time, when the sorting conveyor 7 further increases its speed and immediately sends out the last unit sheet S'to the horizontal aligning conveyor 8 in the upper transfer path, it instantly swings downward and is then sent in. The first unit sheet S ′ is sent to the horizontal alignment conveyor 8 on the lower transfer path. At this time, since the lower slitter / scorer 9 is already held in a processable state, the unit sheet S ′ fed from the horizontal aligning conveyor 8
The sheet is cut into a required width dimension by the slitter / scorer 9, scoring is performed, and the sheet is carried out by the discharge conveyor device 10.

〔effect〕

As described above, according to the corrugated board sheet manufacturing apparatus of the present invention, the corrugated board web fed from the double facer is cut to a set length by the rotary cutter to form the unit sheet, and then the unit sheet is conveyed to the upper transfer path and the lower side. It is transported to one of the side transfer paths, cut to the required width dimension by the slitter scorer provided on that transfer path, and scoring is applied, and the slitter scorer installed on the other transfer path at the time of processing Since the position of the blade is adjusted to a workable state and the unit sheet for one lot is manufactured, the sorting conveyor is instantaneously swung to switch the unit sheet transfer direction. It is possible to prevent loss of corrugated board web when changing lots, improve productivity, and install a rotary shear. Since there is no need, the apparatus is simple.

In addition, since the transport speed of the unit sheet of the carry-out conveyor and the sorting conveyor is made faster than the traveling speed of the corrugated board web,
A required space can be formed between unit sheets of a set length formed by the rotary cutter. For this reason,
When the transfer path of the unit sheet is switched by the sorting conveyor, the transfer path of the unit sheet can be switched without disturbing the conveyance of the unit sheet.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a manufacturing apparatus according to the present invention, and FIG. 2 is a schematic view showing a conventional manufacturing apparatus. 1 ... double facer, 4 ... rotary cutter, 7 ... sorting conveyor, 8 ... horizontal aligning conveyor, 9 ... slitting and scorer, 10 ... discharging conveyor device.

Claims (1)

[Scope of utility model registration request] 1. A rotary cutter for cutting a corrugated board web continuously in a width direction to form a unit sheet of a set length in a transfer path of the corrugated board web fed from a double facer, and the rotary cutter ejected from the rotary cutter. An unloading conveyor that conveys unit sheets to the downstream side, and an allocating conveyor that supplies the unit sheets sent from the unloading conveyor by switching between upper and lower two upper and lower transfer paths are provided. A horizontal alignment conveyor that receives the unit sheet sent from the sorting conveyor and conveys it forward while guiding both side edges of the unit sheet to each of the lower transfer path and a unit sheet sent from the horizontal alignment conveyor to a required width. Slitter scorer that cuts to size and puts in creases and sent from the slitter scorer And a discharge conveyor unit sheet issued provided, the discharge conveyor and sorting conveyor of the sheet conveying speed cardboard sheet manufacturing apparatus faster than the running speed of the corrugated cardboard web and.