JP2813338B2 - Wrap device in corrugator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugator for manufacturing corrugated cardboard, which relates to a lapping device for stacking corrugated cardboard sheets cut to a predetermined length in a roof tile shape (hereinafter simply referred to as a tile shape) during transfer. is there.

[0002]

2. Description of the Related Art FIG. 4 schematically shows a part of a corrugator for producing a corrugated cardboard sheet. Continuous cardboard sheet A ₀ traveling at a predetermined speed of about 200 meters / minute, is cut by the rotary cutter 50, cutting the corrugated cardboard sheet A ₁ of a predetermined length is formed by the cutting.

The cut corrugated cardboard sheet A ₁ is sent to a sheet transfer conveyor 51 having a speed higher than the traveling speed of the continuous corrugated cardboard sheet A ₀ , and the cut corrugated cardboard sheet A ₁ is sent.
Are formed between them.

The interval prevents the front end of the continuous corrugated cardboard sheet A _{0 from} interfering with the rear end of the cut corrugated cardboard sheet A ₁ immediately before being cut by the rotary cutter 50, or the defective cut corrugated cardboard sheet A 1. It is formed in order to facilitate removing the a _1.

[0005] Next, the cut corrugated cardboard sheet A ₁ in imbricated by being fed onto the lap conveyor 52 for transferring the cut cardboard sheets A ₁ at a low speed than the running speed of the continuous cardboard sheet A ₀ from the sheet transfer conveyor 51 The stacking facilitates automatic stacking of sheets in the stacker section on the downstream side. In order to ensure the tile-like stacking on the wrap conveyor 52, the supply end of the wrap conveyor 52 is arranged below the discharge end of the sheet transfer conveyor 51, and the conveying surface of the wrap conveyor 52 faces the next stacker. It is gently inclined with an uphill slope.

[0006] Here, Simply feed the cut cardboard sheets A ₁ on the lap conveyor 52 in a high speed state from the sheet transfer conveyor 51, cutting the corrugated cardboard sheet A ₁ line side after fed later on lap conveyor 52 previously slip fed the leading side of the cutting corrugated cardboard sheet a ₁ above, or not in the stop position the cutting corrugated cardboard sheet a ₁ of the trailing side is constant with respect to the corrugated cardboard sheet a ₁ of the preceding side, cutting the corrugated cardboard sheet a ₁ is at Midareton the fed and not its orientation is constant, on the lap conveyor 52, it is impossible to transport the cut cardboard sheets a ₁ in the aligned imbricated pitch is constant.

[0007] In order to solve such inconvenience, conventionally, the brush 53 provided on the feed end of the wrap conveyor 52, while holding the cut cardboard sheets A ₁ sent by the brush 53 on the wrap conveyor 52, cutting so that to decelerate the transport speed of the cardboard sheet a _1.

[0008]

By the way, the brush 53
In the conventional wrap device using the cutting corrugated cardboard sheet A ₁ fed from the sheet transfer conveyor 51 over lap conveyor 52, the sheet transfer conveyor 5 is a rear end portion
State or front and rear end portions located on 1 has been pushing down with the brush 53 in a state of being supported by the sheet transfer conveyor 51 and the lap conveyor 52, undergo under the cutting corrugated cardboard sheet A ₁ is depressed position of the brush 53 since member is not present, when a weak cutting corrugated cardboard sheet a ₁ chewy, it may become defective caused creases.

Further, the transfer portion from the sheet transfer conveyor 51 to wrap the conveyor 52, and there is no receiving member cut corrugated cardboard sheet A ₁ facing the brush 53, cutting the corrugated cardboard sheet A ₁ is always good surface accuracy not limited, while others wavy warping or surface, the cut cardboard sheets from a relationship such as mounting accuracy of a ₁ in surface precision or brush 53, contact pressure is cut stage of the brush 53 with respect to cut corrugated cardboard sheet a ₁ cardboard sheet not uniform across the width direction of a _1, the gradient is produced in the nonuniformity of the contact pressure to the feed direction of the cutting corrugated cardboard sheet a _1, on the lap conveyor 52, superimposed regularly cut corrugated cardboard sheet a ₁ in imbricated There are also problems that cannot be done.

[0010] In addition, since there is no any even function that gives the transfer unit sent to the cutting corrugated cardboard sheet A _1, can not be sent regularly cut corrugated cardboard sheet A ₁ to wrap conveyor 52.

An object of the present invention is to provide a wrapping device for a corrugator which can be regularly superimposed on a tile without corrugating a corrugated cardboard sheet.

[0012]

According to the present invention, there is provided a cutter for cutting a continuous corrugated cardboard sheet traveling at a predetermined speed to form a cut corrugated cardboard sheet having a predetermined length. A sheet transfer means for transferring the cut corrugated cardboard sheets sequentially sent from above at a speed higher than the traveling speed of the continuous corrugated cardboard sheets to form an interval between the cut corrugated cardboard sheets; and In a wrapping device in a corrugator, in which a lap conveyor for transferring a cut corrugated cardboard sheet at a speed lower than the traveling speed of a continuous corrugated cardboard sheet and stacking the cut corrugated cardboard sheets in a roof tile shape is sequentially disposed, the discharge end of the sheet transfer means and the wrap In the transfer path of the cut cardboard sheet between the feed end of the conveyor, A sheet transfer device for transferring the sheet while controlling the transfer speed in contact with the sheet transfer device; and a driving transfer unit for controlling the transfer speed of at least one of a pair of members arranged above and below the sheet transfer path of the sheet transfer device. The transfer speed of the cut cardboard sheet by the sheet transfer device is maintained at the same speed as the sheet transfer speed by the sheet transfer means until the trailing end of the cut cardboard sheet leaves the sheet transfer means, and then the speed is reduced, and Until the end leaves the sheet transfer device, the speed is kept lower than that of the sheet transfer means, and then the speed is increased, and the above-mentioned speed is maintained until the leading end of the next transferred cut cardboard sheet reaches the sheet transfer device. This is a configuration including a control unit that controls the sheet to return to the same speed as the sheet transfer speed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

[0014] As shown in FIGS. 1 and 2, the continuous cardboard sheet A ₀ traveling at a predetermined speed is cut into a predetermined length by a rotary cutter 1.

On the downstream side of the rotary cutter 1, a cut cardboard sheet A cut by the rotary cutter 1 is provided.
A sheet transfer conveyor 10 is provided as sheet transfer means for transferring the sheet ₁ in one direction.

The transfer speed of the cut corrugated cardboard sheet A ₁ transferred by the sheet transfer conveyor 10 is set to be higher than the traveling speed of the continuous corrugated cardboard sheet A ₀ , and the speed difference causes the rotary cutter 1 to sequentially move onto the sheet transfer conveyor 10. regular intervals between cut cardboard sheets a ₁ fed is formed.

A wrap conveyor 20 is provided downstream of the sheet transfer conveyor 10, and the wrap conveyor 20 is provided.
Sheet delivery device 30 for delivery of cutting corrugated cardboard sheet A ₁ between the seat transfer conveyor 10 is provided with.

The transfer speed of the cut corrugated cardboard sheet A ₁ by the lap conveyor 20 is lower than the traveling speed of the continuous corrugated cardboard sheet A ₀ , and the cut speed of the cut corrugated cardboard sheet A ₁ sequentially sent from the sheet transfer device 30 is reduced by the speed difference. Layered.

The sheet delivery device 30 includes a drive roller 31 as a drive transferring means for controlling the delivery rate of a member for receiving the cutting corrugated cardboard sheet A _1, is a member for pressing the cutting corrugated cardboard sheet A ₁ to the drive roller 31 The drive roller 31 includes a control unit 4.
0 rotates in the direction of the arrow in FIG.

The control means 40 controls the sheet transport conveyor 10
A sheet detection sensor PH for generating a signal indicating that the rear end has left the sheet transfer conveyor 10 by being provided on a discharge end for detecting the trailing end of the cut corrugated cardboard sheet A ₁ of Terupuri sheet transfer conveyor 10 11
And a rotary encoder 41 connected to the drive roller 31 to generate a signal proportional to the rotation speed, and a rotary encoder 42 connected to the drive roller 31 to generate a signal proportional to the rotation speed. The control unit 43 outputs such a control signal, and the motor 44 drives the drive roller 31 based on the control signal.

The control unit 43, the sheet detecting sensor PH detects the passage of the rear end of the cutting corrugated cardboard sheet A _1, as shown in FIG. 2, when a state ON, the driving motor 44 of the drive roller 31 controlled and, to decelerate the driving roller 31 from the transfer speed and the same speed V _H of the sheet transfer conveyor 10, which is measured by the rotary encoder 41 until the speed V _L.

Further, the control unit 43, the trailing edge of the cut corrugated cardboard sheet A ₁ is a sheet detection sensor PH is turned ON off discharge end of the sheet transfer conveyor 10, rotation of the drive roller 31 by a signal from the rotary encoder 42 The measurement of the amount is started, and from the amount of rotation, the cut cardboard sheet A ₁
Of the sheet detection sensor P
When the rear end of the distance L equals turned by cutting the corrugated cardboard sheet A ₁ to ₁ between H and the driving roller 31 leaves the sheet delivery device 30, a transfer speed of the sheet transfer conveyor 10 to accelerate the drive roller 31 to the velocity V _H Return to the same speed.

[0023] Here, the rotational speed V _L at the time of low-speed rotation of the drive roller 31, one for the rotational speed V _H of the high-speed rotation /
About 10 is preferable.

[0024] Now, the cutting corrugated cardboard sheet A ₁ cut by the rotary cutter 1 is transported to the downstream side by the sheet transfer conveyor 10 in a state in which there will be a predetermined spacing between the sheets, the cut corrugated cardboard sheet A ₁ is driven Roller 3
The paper is fed onto the lap conveyor 20 by passing between the brush 1 and the brush 32.

Since the moving speed of the cut corrugated cardboard sheet A ₁ by the lap conveyor 20 is lower than the traveling speed of the continuous corrugated cardboard sheet A ₀ , the cut corrugated cardboard sheet A sent from the drive roller 31 onto the wrap conveyor 20 is moved.
₁ has a tile shape in which the leading end overlaps the corrugated cardboard sheet A1 which has been sent to the lap conveyor 20 _first . The rear end of the cut corrugated cardboard sheet A ₁ passes the position of the sheet detecting sensor PH, the sheet detection sensor PH is cardboard sheet A
_When the passage of ₁ is detected, the control unit 43 decelerates the drive roller 31 and rotates the drive roller 31 at a low speed according to a detection signal from the sheet detection sensor PH.

When the driving roller 31 is decelerated from the high-speed rotation to the low-speed rotation, the cut cardboard sheet A ₁ is decelerated by the contact with the driving roller 31 and the brush 32,
Corrugated sheet A ₁ is transported at a substantially equal speed and the rotational speed V _L at the time of low-speed rotation of the drive roller 31.

When the sheet detecting sensor PH detects the passage of the rear end of the cut cardboard sheet A ₁ , the control unit 43 measures the moving amount of the cut cardboard sheet A _{1 based} on a signal input from the rotary encoder 42. When the amount of movement of the cut cardboard sheet A ₁ becomes equal to the distance L ₁ between the sheet detection sensor PH and the drive roller 31, the control unit 43 accelerates the drive roller 31 to the speed V _H.

[0028] As described above, the rear end of the cut corrugated cardboard sheet A ₁ has a drive roller 31 in the range up to leaves the sheet delivery device 30 away from the discharge end of the sheet transfer conveyor 20 so as to low speed, by contact with the drive roller 31 and the brush 32 for low speed, it can be fed positively in a low speed state cut corrugated cardboard sheet a ₁ on lap conveyor 20.

[0029] for pressing the cutting corrugated cardboard sheet A ₁ to the drive roller 31 of the low speed state, the occurrence of inconvenience that the drive roller 31 plays a role of receiving beneath Slight cut corrugated cardboard sheet A ₁ occurs is none. Moreover,
Cutting the corrugated cardboard sheet A ₁ is for uniform contact throughout the length direction of the drive roller 31 to transport positively at a low speed, no occurrence of inconvenience that the inclination occurs in the cutting corrugated cardboard sheet A _1, cut on the lap conveyor 20 it is possible to overlay the corrugated cardboard sheet a ₁ to regularly imbricated.

In the embodiment shown in FIG. 1, the sheet detection sensor PH is disposed on the discharge end of the sheet transfer conveyor 10, but the sheet detection sensor PH is shifted from the discharge end forward and backward in the sheet transfer direction. May be arranged.

As shown in FIG. 3, the sheet transport conveyor 1
When the detection sensor PH is arranged upstream of the discharge end of the zero,
Cut cardboard sheet trailing edge of the A ₁ is a sheet detection sensor PH
When passing the same time, measures the amount of movement of the cutting corrugated cardboard sheet A ₁ in the rotary encoder 42, when the amount of movement is equal to the distance L ₂ between the discharge end of the sheet detecting sensor PH and the sheet transfer conveyor 10, the driving roller 31 Is decelerated to a low speed V _L rotation.

[0032] Then, the amount of movement of the cutting corrugated cardboard sheet A ₁ measured by the rotary encoder 42, when the amount of movement is equal to the distance L ₁ from the discharge end of the sheet transfer conveyor 10 to the drive roller 31, the acceleration drive roller 31 To return to the original high-speed V _H rotation state.

In the embodiment shown in FIG. 1 and FIG. 3, the sheet transfer device 30 is composed of a combination of the driving roller 31 and the brush 32. However, the sheet transfer device 30 is not limited to this.

For example, it may be composed of a belt conveyor and a belt conveyor, a belt conveyor and a roller, a belt conveyor and a brush, or a combination of a roller and a roller. In any case, at least one of the paired members is driven by a motor. The drive side member (drive transfer means) may be disposed below the sheet transfer path or may be disposed above the sheet transfer path.

When each of the pair of members is driven by a motor, the members are rotated synchronously.

The control means of the drive transfer means of the sheet transfer device sets the speed of the drive transfer means at the same speed as the transfer speed of the sheet transfer means until the trailing end of the cut cardboard sheet leaves the sheet transfer means which transfers at high speed. Until the trailing end of the cut corrugated cardboard sheet leaves the sheet delivery device, and then keeps it at a lower speed than this transfer speed, and then until the leading end of the next cut cardboard sheet reaches the sheet delivery device. Any control means may be used as long as the control means returns to the same speed as the transfer speed of the sheet transfer means.

[0037]

As described above, according to the present invention, when the rear end of the cut cardboard sheet leaves the sheet transfer means,
Since the sheet transfer speed of the sheet transfer device that controls the transfer speed by contacting the upper and lower surfaces of the cut cardboard sheet is set to be low, the cut cardboard sheet can be positively sent at a low speed onto the lap conveyor, and Since the traveling speed of the cut corrugated cardboard sheet is reduced in a state where the cut corrugated cardboard sheet is supported vertically, the cut corrugated cardboard sheet can be regularly stacked on the lap conveyor in a tiled manner without being bent or inclined.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of a wrapping device according to the present invention.

FIG. 2 is a velocity diagram of a driving roller of the above.

FIG. 3 is a schematic view showing another embodiment of the present invention.

FIG. 4 is a schematic view showing a conventional lapping device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary cutter 10 Sheet transfer conveyor 20 Lap conveyor 30 Sheet transfer device 43 Control part

Claims (1)

(57) [Claims] 1. A cutter for cutting a continuous corrugated cardboard sheet running at a predetermined speed to form a cut corrugated cardboard sheet of a predetermined length, and a traveling speed of the cut corrugated cardboard sheet sequentially sent from the cutter. A sheet transferring means for transferring at a higher speed to form an interval between the cut corrugated cardboard sheets, and transferring and cutting the cut corrugated cardboard sheets sequentially sent from the sheet transferring means at a speed lower than the running speed of the continuous corrugated cardboard sheet. In a wrapping device in a corrugator, in which a lap conveyor for stacking corrugated cardboard sheets in a roof tile shape is sequentially disposed, a cut corrugated cardboard is provided in a transfer path of a cut corrugated cardboard sheet between a discharge end of the sheet transfer means and a supply end of the wrap conveyor. A sheet transfer device that contacts the upper and lower surfaces of a sheet and transfers the sheet while regulating the transfer speed The sheet delivery device, as a drive transfer means for controlling the delivery speed of at least one of a pair of members disposed above and below the sheet transfer path, the delivery speed of the cut cardboard sheet by the sheet delivery device, Until the rear end of the cut corrugated cardboard sheet leaves the sheet transfer means, the sheet transfer speed is maintained at the same speed as the sheet transfer means, and then the speed is reduced, and the sheet transfer means is maintained until the rear end leaves the sheet transfer device. Keep it at a lower speed, and then increase it,
A wrapping device in a corrugator, comprising: a control unit that controls the sheet transfer speed to return to the same speed as the sheet transfer speed before the leading end of the cut cardboard sheet to be transferred next reaches the sheet transfer device.