JPH07100975A - Manufacture of paper tube - Google Patents

Abstract

PURPOSE:To provide a method for manufacturing a paper tube in which the tube can be formed of thin waste paper having low stiffness such as newspaper, etc. CONSTITUTION:A ribbonlike paper tube sheet 11 is sucked and fed by a lift pedestal 20 provided on a truck 15 under a mandrel 1 axially formed with a suction hole, and the sheet 11 is coated with adhesive along one end of a longitudinal direction by a hot-melt gun 29 provided above a line on the way of feeding. The sheet 11 coated with the adhesive is opposed to the mandrel 11 by lifting the pedestal 20, the hole of the mandrel 1 is set to a negative pressure, the sheet 11 is sucked, rotatably driven to be rolled, a paper tube P is manufactured without coating the entire sheet 11 with the adhesive, thereby forming the tube P of thin waste paper having low stiffness such as newspaper, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a paper tube suitable for manufacturing a paper tube which is thin and has a weak stiffness, for example, used paper such as newspaper.

[0002]

2. Description of the Related Art In recent years, paper tubes used as core materials for containers and scrolls have been used in other ways, for example, paper tubes manufactured by using waste paper, etc., at low cost instead of styrofoam or cardboard. It has also been proposed to use it as a cushioning material or spacer material for reusing resources.

By the way, the paper tube includes a spiral paper tube and a flat paper tube, which are manufactured by different methods.

As shown in FIG. 8, the spiral paper tube is provided with pulleys on both sides, and a mandrel 1 wound around by crossing a winding belt stretched between the pulleys,
It is manufactured by a method in which tape-shaped cardboard paper is applied from the front side of the winding belt with adhesive applied to the entire outer surface, and the winding belt is run by the rotation of the pulley to wind the paper in a spiral shape. .

Further, as shown in FIG. 9, the flat paper tube has a cut end of an endless thick paper sheet fitted into a mandrel 1 having a groove formed in the axial direction, and the mandrel 1 is rotationally driven. By winding the paper around the mandrel 1,
The paper tubes manufactured by the both methods are manufactured by winding a cardboard paper tightly to manufacture a paper tube having high strength used as a container or a core material.

[0006]

However, since the above-described method for manufacturing the spiral paper tube and the flat paper tube is a manufacturing method suitable for manufacturing a paper tube using cardboard, for example, it is thin and flexible. There is a problem that it is difficult to manufacture a waste paper such as a weak newspaper into a paper tube.

That is, since waste paper such as newspaper is thin and has a high hygroscopic property, when the adhesive is applied to the entire surface in the above manufacturing method, the adhesive is contained too much and is easily broken. Further, the newspaper containing the adhesive adheres to the mandrel when it is wound on the mandrel and cannot be removed.

For this reason, in the spiral paper tube, the paper tube is broken by the tension of the belt when the paper tube is formed, and the paper tube after being wound cannot be delivered from the mandrel.

Similarly, even a flat paper tube cannot be removed by sticking to the mandrel. Further, in the case of a flat paper tube, since the newspaper is thin, it is not held in the groove when it is fitted into the mandrel groove and slips out. There is also a problem that it can not be wound up well. Then, the subject of this invention is thin,
It is an object of the present invention to provide a paper tube manufacturing method capable of manufacturing a paper tube even with weakly used waste paper.

[0010]

In order to solve the above-mentioned problems, according to the present invention, an adhesive is applied to a ribbon-shaped paper tube paper cut into a certain length along one end in the length direction. The paper coated with the adhesive is made to face a mandrel having a plurality of suction holes formed along the axial direction, the suction holes of the mandrel are set to a negative pressure, and the other end portion of the paper tube paper is After the suction, the mandrel was driven to rotate, and the manufacturing method for winding the paper core paper was performed.

At this time, a method of removing the paper core paper wound on the mandrel by exhausting it from the suction hole of the mandrel can be used.

At this time, the width of the ribbon-shaped paper tube paper is wider than the outer peripheral length of the mandrel.

[0013]

According to such a manufacturing method, an adhesive is applied to a ribbon-shaped paper tube paper cut into a certain length along one end in the length direction of the paper, whereby the entire surface of the paper is cut. Apply an adhesive to the entire paper to prevent the entire paper from including the adhesive and becoming fragile.

Further, the paper coated with the adhesive is made to face the mandrel in which a plurality of suction holes are formed along the axial direction, the suction holes of the mandrel are set to a negative pressure, and the paper is coated with the adhesive. By sucking the other end, the mandrel fixes the paper regardless of the strength of the waist of the paper.

When the mandrel is rotationally driven in this state,
The paper is wound on a mandrel, and when wound,
The adhesive at one end of the paper is adhered to the wound paper to form a paper tube.

At this time, the mandrel does not come into direct contact with the adhesive applied to the paper, and the wound paper does not stick to the mandrel.

Therefore, the paper tube formed of the mandrel can be easily removed.

At this time, if the mandrel is removed while being evacuated from the suction hole, an air layer is formed between the mandrel and the paper tube, and the paper tube and the mandrel are separated, so that the removal is extremely easy. I can do it.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a paper tube manufacturing apparatus for manufacturing a paper tube based on the paper tube manufacturing method of the present invention.

This paper core manufacturing apparatus includes a machine base 2, a paper core paper supply section (hereinafter referred to as a supply section) 3 provided on the machine base 2,
A paper tube winding section (hereinafter referred to as a winding section) 4 connected to the supply section 3 is provided.

As shown in FIG. 2, the supply unit 3 includes a paper feed holder 7 provided on a platform 6 in which metal plates are screwed to a plurality of columns 5 standing on the upper surface of the machine base 2, and a paper feed holder 7 for the paper feed holder 7. The transfer device 8 is provided inside the platform 6 below the paper holder 7.

As shown in FIG. 2, the paper feed holder 7 comprises a U-shaped outer support wall 9 and an I-shaped inner support wall 10, and is surrounded by both support walls 9 and 10. The paper core paper 11 cut in a ribbon shape is set in.

A discharge window 12 in which the platform 6 is cut out is formed at the tip (winding portion side) of the holder 7, and the transfer device 8 is exposed below the window 12.

The transfer device 8 includes a line 1 extending to the winding section 4.
3, a linear way in which permanent magnets 14 are arranged at predetermined intervals, and a dolly 15 arranged on the linear way and provided with an electromagnet for levitation. As shown in FIG. 1, the dolly 15 is a machine. Linear drive device 1 provided in the table 2
It is connected with 6. The linear driving device 16 is composed of a ball screw 17 arranged in parallel with the line 13 and a servomotor 18 for driving the ball screw 17, and the carriage 15 is levitated from the line 13 by an electromagnet and linearly driven. The device 16 runs along the track 13.

An elevator 20 supported by an elevator air cylinder 19 is provided on the carriage 15.

As shown in FIG. 2, the lift table 20 is provided with a plurality of suction holes 21 along the length direction.
1 is connected to a vacuum pump 22 provided in the machine base 2 via a control valve.

The elevating table 20 stands by inside the platform 6 while being lowered by the elevating air cylinder 19, the suction hole 21 is kept at a negative pressure by the vacuum pump 22, and faces the discharge window 12 of the upper platform 6. Paper 1
Aspirate 1. At this time, by moving the carriage 15, the paper 11 is taken out from the paper feed holder 7 one by one.

Further, the suction hole 21 can be smoothly taken out by enlarging the suction hole 21 facing the discharge window 12 of the platform 6 at the tip to increase the suction force. .

The sheet 11 thus taken out is
At the same time as being taken out, it is adsorbed and fixed by a plurality of suction holes 21 provided along the length direction of the elevating table 20.

In the winding section 4, a support base 23 is provided on the machine base 2, support members 24 are attached to both ends of the support base 23, and a shaft 25 is inserted and supported between the support members 24. One end is supported by a guide device 26 attached to the supported shaft 25 and a bearing 27 supported on the supply unit 3 side of the support member 24, and the other end is swingably supported by the shaft 25. A mandrel 1 rotatably supported on the track 13 by a fixing chuck device 28 and an L-shaped metal fitting attached to the outer support wall 9 of the holder 7 for applying an adhesive on the track 13. It consists of a hot melt gun 29.

The guide device 26 has diamond-shaped support plates attached to both ends of a pipe rotatably fitted to the shaft 25.
A connecting rod 3 is provided between the opposite ends of the supporting plate.
And a guide plate 32 attached to the connecting rod 30 on the mandrel 1 side of the swing rod 31.
And an air cylinder 33 attached to the other connecting rod 30.

The guide plate 32 is formed by bending a metal plate having a length substantially the same as that of the paper 11 so as to have an opening having a cross section of about 90 ° as shown in FIG.
It is formed so as to fit with the guide plate 3 when the rocking rod 31 is rocked by the air cylinder 33.
2 contacts the mandrel 1.

The mandrel 1 is hollow, and a plurality of suction holes 34 communicating with the hollow are formed along the length direction.

A rotary joint is attached to the end of the mandrel 1 supported by the bearing 27.
For example, it is connected to the vacuum pump 22 and a compressor (not shown) via a control valve such as a three-way valve, so that the suction hole 34 can be maintained at a negative pressure or exhausted from the suction hole 34.

Further, a toothed pulley 36 is attached to the end portion of the mandrel 1 and is driven and rotated by a motor in the machine base 2 and a timing belt 3.
Connected by 7.

On the other hand, the fixing chuck device 28 for supporting the other end of the mandrel 1 is an L-shaped member 38 fitted into the shaft 25 and rotatably supported, and the mandrel 1 at one end of the member 38. A fixing air cylinder 40, which is attached so as to face each other and has a chuck 39 fitted to the tip of the mandrel 1 and which is fitted to the tip of the mandrel 1, and a rod is attached to the other end of the member 38 via a link so that the cylinder body is The movable air cylinder 41 is fixed to the shaft 25 by a metal fitting, and the movable air cylinder 41 causes the L-shaped member 38 to oscillate.
0 moves up and down in parallel with the axis of the mandrel 1.

That is, the fixing air cylinder 40 is located on the axis of the mandrel 1 when the paper 11 is wound, the rod is extended, the chuck 39 is fitted to the tip of the mandrel 1, and is rotatably supported. To prevent the mandrel 1 from swinging.

When the paper tube is taken out, the rod of the fixing air cylinder 40 is contracted to release the fitting with the mandrel 1, and the L-shaped member 38 swings to move upward to move the mandrel. Open the tip of 1 to enable the removal of the paper tube.

The hot melt gun 29 sprays the melted hot melt resin onto the paper 11 fixed to the lifting table 20 being transferred by the transfer device 8 to make the paper 11
A heat-welding adhesive (hereinafter referred to as hot melt) is applied along the lengthwise end of the.

In addition, a swing motion type air cylinder 43 having a discharge lever 42 attached to the tip of the lifting table 20 is attached to the tip of the rod as a paper tube ejecting device, and the paper 11 is transferred. At this time, one side of the discharge lever 42 is brought into contact with the mandrel 1 by the air cylinder 43, and the paper tube formed by the mandrel 1 is pushed out and removed.

When returning, the discharge lever 42 is separated from the mandrel 1 by the air cylinder 43 so that it does not interfere with the traveling.

This embodiment is constructed as described above. Next, the operation of the paper tube manufacturing apparatus will be described to explain the paper tube manufacturing method of the present invention.

In this paper core manufacturing apparatus, a newspaper cut into a ribbon shape as the paper core paper 11 is set in the paper feed holder 7 as shown in FIG. 4 (a).

At this time, the lift table 20 inside the platform 6 sucks the sheet 11 exposed from the discharge window 12 of the platform 6 by operating the control valve to set the suction hole 21 to a negative pressure. Simultaneously with the suction, the dolly 15 moves toward the winding section 4, and one sheet 11 is taken out from the sheet feeding holder 7 and transferred.

At this time, the hot melt gun 29 sprays the hot melt 44 onto the paper 11 on the lift table 20 to be conveyed, so that the paper 11 is thinned along one end in the longitudinal direction. , Linear hot melt (adhesive)
Apply 44. For this reason, the hot melt 44 is not applied to the entire surface of the paper 11, and the strength of the paper 11 is maintained.

When the carriage 15 reaches below the mandrel 1, it stops and the suction hole 34 of the mandrel 1 and the paper 11 are stopped.
4A and 4B are opposed to each other, and as shown in FIG. 4B, the lifting platform 20 is lifted up to the height of the mandrel 1 by the lifting air cylinder 19.

At this time, the L-shaped member 38 is swung by the actuation of the fixing chuck device 28, and the mandrel 1
The rod extends from the fixing cylinder 40 that has moved along the axis of, and the chuck 39 at the tip of the rod fits and supports the tip of the mandrel 1.

At this time, the vacuum inside of the mandrel 1 is maintained at a negative pressure by the vacuum pump 22, and at the same time, the suction of the suction holes 21 of the lifting table 20 is stopped, so that the mandrel 1 can be removed as shown in FIG. , The other end of the paper 11 on which the hot melt 44 is not applied is adsorbed and fixed.

As described above, when the paper 11 is fixed, the guide device 26 operates to rock the rocking rod 31 and bring the guide plate 32 into contact with the mandrel 1.

Then, as shown in FIG. 4C, the mandrel 1 is rotationally driven to wind up the paper 11. At this time, the guide plate 32 assists the winding of the paper 11 along the mandrel 1 as shown in FIG.

The paper 11 wound on the mandrel 1 in this manner has its one end coated with the hot melt 44 adhered to the wound paper 11 to form a paper tube P.

Therefore, the hot melt 44 does not come into direct contact with the mandrel 1 and is adhered to the paper 11, so that it does not stick to the mandrel 1.

Further, by using the hot melt 44 as the adhesive, the adhesive can be dried quickly, so that the stickiness of the formed paper tube can be prevented.

When the paper tube P is formed, the mandrel 1 stops rotating, the guide device 26 swings, lowers the guide plate 32, and separates from the mandrel 1.

At this time, in the fixing chuck device 28, the fixing air cylinder 40 is actuated to reduce the rod, and the fitting with the tip of the mandrel 1 is released. Is swung to move the fixing air cylinder 40 upward to open the tip of the mandrel 1.

During this time, the carriage 15 returns to the inside of the home plate 6, again sucks the next sheet 11 by making the suction hole 21 of the lift 20 negative, and guides the guide plate 3 from the mandrel 1.
Simultaneously with the separation of 2, the movement starts again.

At this time, the discharging device operates, and the discharging lever 42 is brought into contact with the mandrel 1 as shown in FIG.
The paper tube P formed on the mandrel 1 is extruded to form a flat paper tube P as shown in FIG.

At this time, the air is discharged from the suction hole 34 of the mandrel 1 by the air compressor, and the paper tube P
An air layer is formed between them and the paper tube P so as to be easily taken out.

When the paper tube P has been taken out, the discharge lever 42 immediately rotates to separate from the mandrel 1 so that it does not interfere with the return of the carriage 15.

Thereafter, the same operation as above is repeated to continuously manufacture the paper tube P.

As described above, this paper tube manufacturing apparatus uses the paper 1
1 is taken out from the supply unit 3 by the transfer device 8 and is transferred to the winding unit 4, hot melt 44 is jetted from the hot melt gun 29 to apply the hot melt 44 along one end of the paper 11 in the length direction. The coated paper 11 on the mandrel 1
After the transfer to the lower side, the suction hole 34 of the mandrel 1 is kept at a negative pressure, the paper 11 is adsorbed, and the mandrel 1 is rotationally driven to wind up the paper 11 to perform the method of manufacturing the paper tube P, and the adhesive is applied. By making it possible to manufacture the paper tube P without applying it to the entire surface of the paper, it is possible to form thin and weak waste paper such as newsprint on the paper tube P.

This method of manufacturing a paper tube is suitable for manufacturing a paper tube using waste paper, but is not limited to this. For example, by adjusting the suction force of the mandrel or the like, a thick paper or It can also be applied to other paper core sheets.

[0064]

According to the present invention, an adhesive is applied along one end in the length direction of a ribbon-shaped paper tube paper by the above method, and the paper coated with the adhesive is adsorbed by a mandrel and wound. Since it is arranged to be taken, it is possible to manufacture a paper tube from a thin and weak elastic waste paper such as newspaper.

Further, in the method of removing the paper tube paper wound on the mandrel by exhausting it from the suction hole of the mandrel, an air layer is provided between the paper tube formed on the mandrel and the mandrel to remove the paper tube. Can be done smoothly.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view of a paper tube manufacturing apparatus according to an embodiment.

FIG. 2 is a plan view of the paper tube manufacturing apparatus of the embodiment

FIG. 3 is an operation diagram of the guide device.

FIG. 4 is an operation diagram of the paper tube manufacturing apparatus according to the embodiment.

FIG. 5 is an operation diagram of the transfer device.

FIG. 6 Mandrel action diagram

FIG. 7 is a flat-rolled paper tube manufactured by the paper tube manufacturing apparatus of the embodiment.

FIG. 8 is a schematic diagram of a method for manufacturing a spiral paper tube.

FIG. 9 is a schematic diagram of a method for manufacturing a flat paper tube.

[Explanation of symbols]

 1 Mandrel 11 Paper tube paper 34 Suction hole (mandrel) 44 Hot melt

Claims (2)

[Claims] 1. A ribbon-shaped paper tube paper cut into a certain length is coated with an adhesive along one end of the lengthwise direction, and the paper coated with the adhesive is spread along the axial direction. A paper which is opposed to a mandrel having a plurality of suction holes, the suction hole of the mandrel is set to a negative pressure, and the other end of the paper tube paper is sucked, and then the mandrel is rotationally driven to wind up the paper tube paper. Pipe manufacturing method. 2. The paper tube manufacturing method according to claim 1, wherein the paper tube paper wound on the mandrel is removed by exhausting air from the suction hole of the mandrel.