JPH09272505A - Method for wrapping rolled-item-body and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for carrying a roll into a body-wrapping position, in the wrapping of a rolled-item body, and easily and smoothly wrap the body even in the rose of a soft wrapping material. SOLUTION: A roll (rolled item) R obtained by rolling an object in the form of a sheet onto a hollow cylindrical core C is held by a chuck. A wrapping material 3 with a width in which margins for wrapping both ends of the roll are added to the width of the roll is drawn out by a length in which a margin for allowing overlap wrapping is added to the length of the periphery of the roll. In the position which is a little apart from the top of the roll R, its front end is pressed onto the roll by means of a touch roller 4. After the extra parts of the wrapping material, projecting from both end-faces of the roll, are sucked by a suction bar 45, the wrapping material 3 is put round the periphery of the roll by integrally rotating the roll R and suction bar 45, thereby wrapping the body in it, and also the rear end of the wrapping material is fastened onto the wrapping material wrapped round the body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging method and apparatus which are advantageous for winding and packaging a packaging material, particularly a flexible packaging material such as a film, around a body of a roll-shaped article.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a roll-shaped article (hereinafter, simply referred to as a roll) is formed by surrounding a cylindrical portion of a roll R with a guide belt 1 substantially all around.
Is rotated to feed the packaging material 3 having a width slightly larger than the roll width into the surrounding opening 2 of the guide belt 1, and the packaging material 3 is guided by the guide belt 1 and wound around the body.

Then, the roll wound in this manner is then bent toward the center of the circle on the roll end face while pulling the packaging material marginal portion projecting from the roll end face, and the triangular protrusions formed between the respective bends. The end face is wrapped by folding the part toward the end face of the roll and converging the end part into the hollow hole of the winding core.

[0004]

However, the conventional body-wrap packaging as described above has a drawback in that the guide belt must be retracted in order to carry the roll to the body-wrapping position, so that the apparatus is complicated and large in size. In particular, the disadvantages were more pronounced when the diameter of the rolls was large and became a bottleneck in the construction of a series of automatic packaging lines.

Moreover, there are various types of packaging materials used for packaging the rolls, and particularly when a flexible film made of polyethylene or the like is used as the packaging material, there is a margin after the roll end surface as a form after the roll-wrapping. It is difficult to apply it smoothly by the usual packaging means which is premised on the fact that the portion hangs down from the end face and the packaging material has an appropriate rigidity.

SUMMARY OF THE INVENTION The present invention addresses the above-mentioned situation, and in particular, does not require the roll to be transported to the body winding position, and is flexible without being hindered by sagging of a margin of the packaging material protruding from the roll end surface. It is an object of the present invention to make it possible to easily and smoothly carry out body winding packaging even when using a roll, thereby contributing to establishment of an automatic packaging line for rolls.

[0007]

That is, one of the features of the present invention which meets the above object is, firstly, that a roll having a sheet-like material wound on a hollow cylindrical core is held by a chuck, and the roll length is With a length that includes the roll-over allowance, roll out the packaging material with a width that includes the roll width and the packaging width at both ends of the roll, and press the tip of the packaging material on the roll with a touch roller at a position slightly offset from the top of the roll. After sucking the wrapping material margin part protruding from both end surfaces of the roll with the suction bar, the roll and the suction bar are integrally rotated to wind the wrapping material around the roll, and the end of the wrapping material is wrapped around the wrapping material. A method for wrapping a roll-shaped article on a packaging material in a body-wrapping manner, and another apparatus for carrying out the above-mentioned packaging method, which is a chuck for holding a roll in which a sheet-like material is wound on a hollow cylindrical core. Device, A pressing device that presses the touch roller against the tip of the unit packaging material that is fed at a position slightly offset from the apex of the outer circumference of the roll held by the chuck device, and the unit packaging material that is fed to the pressing position. The feeding conveyor for conveying the target packaging material and an adhesive force imparting device for imparting an adhesive force to the end portion of the packaging material during transportation of the unit packaging material conveyed by the feeding conveyor, and the pressing device and the feeding conveyor rotate respectively. In addition, the chuck device is equipped with a push cup to be pushed into the core of the roll and a suction bar for sucking and holding a packaging material margin portion protruding from both end faces of the roll substantially parallel to the push cup. The push cup and the suction bar can slide independently of each other and can rotate integrally, and the suction bar has a plurality of suction ports. It is a device having the structure that is connected to the suction air source through the air vents provided in the axial center of the cup coaxially press via the gas pipe.

[0008]

According to the present invention, first, the roll core is held by the chuck device, and the touch roller is brought into contact with a position slightly shifted from the apex of the roll holding the core, and the required size of the roll is drawn out. That is, the leading end of the wrapping material having a width obtained by adding the margin of the roll to the circumference of the roll and the width of the roll plus the wrapping margins at both ends of the roll is pressed against the roll. Then, the body winding margin portion protruding from the end surface of the packaging material pressed against the roll by the touch roller is sucked with a suction bar, and the roll and the suction bar are rotated integrally to perform body winding packaging.
The end of the wrapping material is given an adhesive force with a glue or the like and is fixed on the roll, thereby completing the body-wrapping.

It is the same as in the conventional case that after the body packaging, the extra portions protruding from both end surfaces are folded and converged and folded into the hollow hole of the core.

[0010]

Embodiments of the present invention will be described below with reference to examples shown in the accompanying drawings.

FIG. 1 is a schematic side view of an essential part of an example of an apparatus for carrying out the packaging method according to the present invention. In the figure, R is a roll in which a sheet-like material is wound on a hollow cylindrical core C in the previous step, Although not shown, the core C is supported by a chucking device shown in FIG. 3, which will be described later. Reference numeral 5 denotes a pair of rotating arms provided on the left and right sides, the base of which is mounted on a shaft 6 which is rotatably supported in the vicinity of the roll R, and the touch roller 4 is rotatably mounted on the tip of the shaft 6 in a rotatable manner. An actuator such as an air cylinder (not shown) rotates from a vertical position (retracted position) indicated by a solid line in the figure to a pressing position where the touch roller indicated by a chain line contacts the roll R.

Then, another shaft 7 is provided horizontally above the shaft 6,
Another pair of left and right rotating arms 8 is attached to this, and a shaft 9 is provided horizontally at the tip of the rotating arm 8. Inside the left and right rotating arms 8, a plurality of pulleys 10 are mounted on the shaft 7. Also, a plurality of pulleys 11 are mounted on the shaft 9 so as to face the pulleys 10, and belts 12 are respectively wound between a plurality of pairs of pulleys 10 and pulleys 11, and an appropriate transmission device is used by an electric motor (not shown). It is configured to introduce power and drive the belt 12.

The details of the belt 12 wound between the two pulleys 10 and 11 are shown in FIG. along Yes and disposed, the whole is formed in a feed conveyor a ₁ of the packaging material turned by an actuator such as an air cylinder to the dashed line position (transport position) from the solid line position shown in FIG. 1 as an integral (standby position) as I am getting it.

[0014] Then, the packaging material hold-down device A ₂ is opposed provided therein when turned to the dashed line position.

In this packaging material pressing device A ₂ , a belt 16 is wound and stretched between two pulleys 14 and 15 so as to face the belt 12 of the packaging material feeding conveyor A ₁ , and the belt is driven by an appropriate drive transmission. It is driven so as to run at the same speed as 12.

[0016] sandwiched packaging material to sandwich a belt 12 and the belt 16 when the infeed conveyor A ₁ of the packaging material came rotates the and into the dashed line position of the (transport position) the configuration described above Te Thus, the belt 12 The packaging material is sent out by the running of the belt 16.

Further, in the illustrated example, a pair of left and right rotating arms 17 are rotatably mounted on the shaft 7, and a packaging material guide roller 18 is rotatably mounted at the end thereof. The rotating arm 17 is rotated from a solid line position in the drawing to a chain line position by an actuator such as an air cylinder not shown.

The mutual arrangement positions of the respective parts have been described above. Next, the specific structure of the chuck device for the roll R will be described with reference to FIG.

In FIG. 3, R is a roll wound on a hollow cylindrical core C, and a pushing cup 19 is pushed into the core C and supported. The push cup 19 is fixed to the shaft 20 by a key 21 so as not to rotate relative to each other. A hollow shaft 22 is fixed to the shaft end of the shaft 20 opposite to the side where the push cup 19 is fixed, and the other end of the hollow shaft 22 is connected to another shaft 23. A vent hole 24 is formed at the center of the shaft 20, and a vent hole 25 is formed near the bottom of the hole so as to extend to the outer periphery of the shaft 20. The ventilation hole 26 is passed through the shaft center of the shaft 23, and the rotary joint 27 is attached to the shaft end, and the rotary joint is piped to an appropriate vacuum source (not shown).

Further, the shaft 23 fixes the gear 28 by keying,
The gear meshes with a gear 29 mounted on a motor M installed on a bracket B of a machine frame F.

Note that the sensor 3 is fixed to the adjacent body 29 'on the side of the gear 28 and is fixed to the bracket B' of the machine frame F.
0 is engaged.

The shaft 23 is supported by a bearing housing 33 via bearings 31, 31. The central portion of the bearing housing 33 and a large diameter portion 34, large diameter portion 34 is a cylinder head 35 fixed to the machine frame F, forms a hydraulic actuated cylinder CY ₁ together with the cylinder 36 and the cylinder 37 .

Thus, the shaft 23, the hollow shaft 2
2. The shaft 20 and the push cup 19 are integrally
And the hydraulic cylinder CY
_The suction airflow moves forward and backward by ₁ , and the suction airflow is a ventilation hole 25, a ventilation hole 24, a hollow shaft 22, a ventilation hole 26, and a rotary joint 2.
7, through a vacuum source.

On the other hand, the cylinder head 35 further extends forward, and a sleeve 39 is mounted on the tip of the cylinder head 35 via bearings 38, 38. Stopped intake communication sleeve 4
1 is fixed

With the above construction, the rotation of the shaft 20 is transmitted via the feather key 40 on the cylinder head 35 of the fluid pressure cylinder CY ₁ to rotate the sleeve 39 and the communication sleeve 41 together with the shaft 20. shaft 20 slides intake contact sleeve 41 by the thrust of the fluid pressure cylinder CY _1.

The intake communication sleeve 41 is connected to a suction bar 45, which will be described later, and a stealer 42 is formed on the inner surface of the intake communication sleeve 41 so that the piping port 42 and the ventilation hole 25 of the shaft 20 communicate with each other. ing. Further, a disk 43 is fixed to the sleeve 39 on the side opposite to the side to which the intake communication sleeve 41 is fixed, and an intake bar 45 is further mounted on the disk 43.
Attach as described. That is, the small sleeve 46 is fixed near the outer periphery of the disk 43, the stud 47 is loosely fitted so as to slide in the sleeve 46 but does not rotate, and the suction bar 45 is fixed to the end thereof. A spring seat 48 is fixed to the other end of the stud 47, and a spring 49 is fitted between the spring seat 48 and the disc 43.

Therefore, the suction bar 45 is always pushed down by the spring 49 to the position shown by the chain line. Separately, the pusher 50 is attached to the tip of the piston rod of the fluid pressure cylinder CY ₂ arranged on the upper part of the machine frame F, and the pusher is pushed out to the 50 'position to normally push out the suction bar 45 to the position shown by the solid line. Keep it. The suction bar 45 is provided with a plurality of suction ports 51, 51, ... And a pipe 52 is connected to the wiring port 42 of the intake communication sleeve 41 to connect the pipe.

[0028] In FIG 1, A ₃ is a device for applying an adhesive force to the packaging material end for wrapping end stop wearing. In the illustrated example, a hot melt gun is shown.

The apparatus according to the embodiment of the present invention is constituted by the above-described respective structures. Next, the operation of the apparatus will be described. The push cup 19 is inserted into the hollow hole of the core C of the roll R carried by an appropriate carrier. is advanced by actuating the cylinder CY _1, pushed by bearing a roll R, it feeds the packaging material 3 from the packaging material feeding device (not shown).

[0030] Normal packaging material feed conveyor A ₁ and the touch roller 4
And the packaging material guide roller 18 is at a solid line position shown in the figure,
The delivered packaging material 3 is delivered so as to hang down a space in which the packaging material feeding conveyor A ₁ and the touch roller 4 are on the right side, and the packaging material guide roller 18 and the packaging material holding device A ₂ are on the left side. Then, when the packing material 3 is fed out by a length that can be pressed against the roll R by the touch roller 4 by an appropriate amount, that is, by the touch roller 4, the packing material feeding device is temporarily stopped, and the rotating arm 5 is rotated to make a touch. The leading end portion of the packing material 3 is pressed against the roll R by the roller 4, and the packing material guide roll 18 is rotated by the rotation arm 17 to be moved to the position shown by the dashed line. The width of the packaging material 3 is wider than the width of the roll, and the extra portion 3 '(see FIG. 3) in the width direction of the packaging material has a roll end surface R'.
As a result, it hangs irregularly so as to cover the suction bar 45.

On the other hand, the suction bar 45 of the chuck device is moved by the pusher 50 of the cylinder CY _{2 to} the position indicated by the solid line 5 in FIG.
After being pushed out to 0 ', the vacuum device is operated and the suction port 51 of the suction bar 45, 51 ... At this time, the margin of the packaging material is 3 ″ shown.
It is irregular like.

[0032] Since subsequently retract to the position shown in position 50 from position 50 'to pusher fluid pressure cylinder CY ₂ when the stud 47 is pushed down to the illustrated dotted line position by a spring 49, even integrally dashed line position the suction bar 45 Moving. As a result, the above-mentioned irregular slack is eliminated in the margin portion of the packaging material as shown by 3a.

Next, when the feeding of the packaging material is resumed and the motor M is started to rotate the push cup 19 and the suction bar 45 integrally, the packaging material 3 is positively wound around the cylindrical surface of the roll. When the leading end of the bobbin passes through the nip point N between the touch roller 4 and the roll R, the required rotation amount is detected by the sensor 30 and the suction of the suction bar 45 is stopped.

On the other hand, the required length L, ie, the roll diameter, is D, and the body-rolling margin is α, and L = πD.
It is cut into a length of + α, and the unit packaging material is sent out by the packaging material feeding conveyor A ₁ and the packaging material pressing device A ₂ , and the end portion thereof is subjected to an adhesive treatment by the packaging material terminal adhesive force imparting device A ₃ , and the roll R When the adhesive treatment portion passes through the nip point N with the rotation of, the end of the packaging material is fixed to the body winding surface.

The roll-wrapping of the roll is completed by the above-mentioned steps. However, the processing of the roll end surface is continued, the excess portion of the roll end surface is converged, and then the roll is pressed into the hollow core by appropriate means. Alternatively, the end face is fixed by an adhesive tape. In particular, a fluid pressure cylinder proposed by the present applicant, having a cylindrical piston rod slidably inserted into the center hole of the winding core and having a front portion disposed to face the end face of the roll, A funnel-shaped suction body coaxially and rotatably connected to the front of the cylinder of the fluid pressure cylinder, a rotation drive mechanism for rotating the suction body, and a fluid pressure cylinder connected to the piston rod rear of the fluid pressure cylinder, Using a device equipped with a suction mechanism for sucking the packaging material into the suction body, the packaging material is rotated by the rotation driving mechanism while the packaging material is rotated into the funnel-shaped suction body by the suction mechanism while being converged. The method of twisting and then pushing the twisted packaging material into the center hole of the core of the roll by the piston rod of the hydraulic cylinder is most advantageous and is suitable for promoting automation of the packaging line.

[0036]

According to the present invention, the body-wrapped package is as described above.
Press the tip of the wrapping material on the roll with a touch roller, suck the excess winding part protruding from the roll end surface with a suction bar, and rotate the roll and the suction bar together to perform body winding packaging. It is not necessary to carry the roll into the winding position surrounded by the guide belt, and the winding of the roll can be easily performed without being particularly affected by the diameter of the roll, and the device is compact and extremely simple to use. In addition, even if the packaging material is flexible due to the suction bar and there is a surplus portion protruding from the roll end surface, the surplus portion is adsorbed by the suction bar, and the slack is also eliminated by sliding of the suction bar, so that there is no obstacle to the body winding packaging. This makes it possible to pack smoothly without giving, and has an extremely effective effect in promoting a series of automation of packaging.

[Brief description of drawings]

FIG. 1 is a schematic side view of an essential part showing an example of an apparatus for carrying out the packaging method of the present invention.

FIG. 2 is a partial front view of a packaging material feeding conveyor in the apparatus of the present invention.

FIG. 3 is a detailed view showing an example of the configuration of the chuck device in the apparatus of the present invention, partially cut away and shown in cross section.

FIG. 4 is a side view showing an example of a conventional body winding packaging method.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 core R roll A ₁ packaging material feeding conveyor A ₃ adhesive force imparting device 3 packaging material 3 'packaging material margin 4 touch roller 5 rotating arm 8 rotating arm 10, 11 pulley 12 belt 13 packaging material support plate 14, 15 Pulley 19 Push cup 20 Shaft 22 Hollow shaft 23 Shaft 24, 25, 26 Vent hole 45 Suction bar 51 Suction port 52 Piping

Claims (2)

[Claims] 1. A roll in which a sheet-like material is wound on a hollow cylindrical winding core is held by a chuck, and the length of the roll is the length obtained by adding the body wrapping margin to the roll width, and the roll width is the wrapping margin at both ends of the roll. Roll out the width of the packaging material, press the tip of the packaging material with a touch roller on the roll at a position slightly offset from the top of the roll, suck the packaging material margins protruding from both end surfaces of the roll with suction bars, and then roll. And a suction bar are integrally rotated to wind the packaging material around the outer circumference of the roll, and the packaging material is wrapped and wrapped, and the end of the packaging material is fixed to the wrapped packaging material. 2. A chuck device for holding a roll having a sheet-like material wound on a hollow cylindrical core, and a unit packaging material fed at a position slightly deviated from the outer peripheral vertex of the roll held by the chuck device. A pressing device that presses the touch roller against the tip of the unit, a feeding conveyor that conveys the fed unit packaging material toward the pushing position, and the packaging material during the transportation of the unit packaging material that is conveyed by the feeding conveyor. It consists of an adhesive force imparting device for imparting adhesive force to the end portion, and the pressing device and the feeding conveyor can be rotated and retracted respectively, and the chuck device is a push cup to be pushed into the roll core. , A suction bar for sucking and holding a packaging material margin portion protruding from both end faces of the roll substantially parallel to the push cup is configured, and the push cup and the suction bar can slide independently of each other. In addition, the suction bar has a plurality of suction ports, and the suction bar has a plurality of suction ports and is provided with an intake source through a ventilation hole provided in an axial center coaxial with the pushing cup through the intake pipe. A body-wrapping device for roll-shaped articles, which is connected to