JPH0818758B2 - Winding method of synthetic resin strip and winding device thereof - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for winding a belt-shaped material such as a synthetic resin band and an apparatus therefor, and more particularly to a method for fixing a winding start end of a synthetic resin-shaped belt and its method. Regarding the device.

《Prior art》 Synthetic resin packing bands are used for packing various items because of their ability to fusion-bond their ends, lightweight, water resistance, high strength, easy handling, and economical efficiency. In particular, in recent years, it is used in an automatic packing line in the packing process at the end of the manufacturing line.

In an automatic packing line, an arch for circulating a band around a product to be packed, a supply roller for supplying the band to the arch, a tightening device for tightening the wound band, and an end of the tightened band are overlapped with each other. 2. Description of the Related Art There is used an automatic packing machine which is equipped with a heat-sealing device for heat-sealing and automatically performs a series of these operations.

As the synthetic resin band used in this automatic packing machine, a synthetic resin band package wound in a traverse state with a predetermined width around the outer circumference of a hollow core such as a paper tube or bobbin having a predetermined diameter is used.

<< Problems to be Solved by the Invention >> However, the package has the following problems.

That is, in the conventional synthetic resin band package, the winding start end of the band is wound on the core with a metal needle, a hot-melt adhesive, an adhesive tape, etc. A method of fixing, or a method of previously forming a slit for inserting the band end into the winding core and inserting the band end into this to lock it, or the method disclosed in Japanese Patent Publication No. 54-43147 previously developed by the present applicant As described above, the band is wound by fixing it by a method of gripping the end portion of the band in a bent state and rotating the winding tube in this state.

Therefore, when the package manufactured by these methods is used in an automatic packing machine, when the winding start end, that is, the band end of the package is supplied to the packing machine, the fixed objects such as the needle, the adhesive, and the adhesive tape described above are attached. There is also a risk that the automatic packing machine will be damaged due to the bent part of the band.

Therefore, in the past, in order to avoid this kind of damage, a staff member had to cut the work just before the end of the package.

By the way, the latest packing machine has developed a system that prepares multiple packages and makes them stand by at the supply standby position, and after one package is consumed, automatically supplies the next package to the supply position and continues the packing work. Has been done.

In such a system, since the end of the band is detected as a method for detecting the switching operation, the entire amount of the package is packed without inducing the above-mentioned harmful effect due to the end of the band, that is, the damage of the packing machine. It is a requirement to be able to use it.

Therefore, it has been demanded that the package used in the above packaging machine should have a structure such as a conventional package that does not have an attachment for fixing at the end portion and a bent portion.

This invention is to solve the above problems, by fixing the starting end of a synthetic resin band-shaped article with an accessory,
It is an object of the present invention to provide a method and a device that can be fixed to a winding core without bending.

<< Means for Solving the Problems >> In order to achieve the above object, in the winding method for a strip of the present invention, the synthetic resin strip is traversed around the outer periphery of the winding core fixed to the winding shaft. In the method of winding while winding, the winding start is started after the winding start end of the synthetic resin strip is gripped by the sandwiching piece at the edge of the hollow core surface.

Further, after the synthetic resin strip is wound up by a predetermined amount, the holding by the holding piece is released.

Further, in the winding device of the present invention for achieving the above winding method, the traverse arm that returns to the end edge of the hollow core before the start of the winding operation, and the flange that rotates in synchronization with the core And a gripping piece for gripping the winding start end of the synthetic resin strip with the outer surface of the winding core by elastic force, and means for releasing the gripping force of the gripping piece outside the rotating system. It is characterized by having and.

<Operation> The above method and the movement of the device are such that the winding start end of the synthetic resin strip is securely fixed by the gripping force of the sandwiching piece from the beginning of winding to the end of winding, and it is held after winding. Even if the gripping force by the piece is released, the winding start end can be maintained in a fixed state by winding the synthetic resin strip.

<< Examples >> Hereinafter, preferred examples of the present invention will be described.

The strip to which the method of the present invention can be applied is a packing band or tape string made of a synthetic resin having a flat shape and a rectangular or elliptical cross section, and a predetermined winding on a hollow core such as a paper tube or a bobbin. It is wound into a package with a width.

A hollow core (hereinafter, referred to as a paper tube or the like) such as a paper tube or a bobbin is usually used in the paper tube or the like in order to prevent itself from being deformed by tightening the wound web. It may be fixed to a winding drum that is expanded and fitted around the circumference, but if the paper tube etc. is thick and has durability against winding tightening, the winding drum is not always used. As shown in a specific embodiment described below, a method of fixing both ends of the bobbin with a pair of flanges may be used. The winding drum or the winding shaft for driving the flange-shaped member to rotate is disposed orthogonally to the direction in which the belt is supplied, and is used for inserting the belt into a traverse cam suspended parallel to the winding shaft. A winding start of a belt-like object which has a sufficient cross-sectional shape, and which engages with a hollow sheath traverse arm having a length reaching from the main body portion of the traverse cam to the vicinity of the winding position and protruding from the tip of the traverse arm. A method is used in which the end is gripped and fixed on the surface of a paper tube or the like by a holding piece to start winding.

The gripping of the winding start end of the belt-shaped material by the holding piece is performed on the surface of the paper tube or the like by the holding piece fixed to the member that rotates in synchronization with the winding shaft.

The gripping force can be obtained by pressure air, electricity, or mechanical elastic force, but the mechanical elasticity method that does not require a joint for supplying pressure air, electricity while rotating can simplify the device. Recommended from the point of view.

As for the gripping force of the synthetic resin strip by the holding piece, at the beginning of winding, the strip is overcome by the winding tension and is gripped.
Requires enough force to continuously wind.

Therefore, the contact surface of the holding piece with the belt-like material may be provided with a large number of irregularities in order to increase the friction coefficient, or a material having a large friction coefficient such as a rubber-like material may be used.

As described above, the synthetic resin strip held by the holding piece on the paper tube or the like is traversed with a predetermined width,
It is laminated on the outer circumference of the paper tube and wound up to a predetermined length, and the winding is completed in that state.

The gripping of the winding start end by the sandwiching piece is sufficient if the friction force between the paper tube and the strip for continuous winding is sufficient after several winding layers are formed in the package and the sandwiching piece is released at this stage. You may go in.

However, in order to release the holding piece during such a winding process, there is a concern that it will take a stop time and the winding shape of the package may be slightly disturbed. It is desirable to cancel.

When releasing the gripping piece after winding, the gripping piece still holds the wound strip, so the gripping piece releases the gripping of the winding start end of the strip. The package including is removed from the winding drum or the winding shaft.

The gripping force can be released by turning on and off the supply of the holding piece when the holding piece is configured to be operated by pressurized air, electricity, etc., but using mechanical resilience such as a spring. If there is, it is necessary to release the holding piece by external force.

In the case of releasing by an external force, one end of the holding piece is pressed by an air cylinder or the like fixed outside the rotating system such as a winding shaft, or it is released by using a magnetic force such as an electromagnet.

The device of the present invention is configured such that the traverse arm can be returned to the edge of the paper tube or the like that is gripped by the holding piece before the start of the winding operation, and rotates in synchronization with the winding shaft that is in contact with the side surface of the paper tube or the like. The holding piece is fixed to the flange. The holding piece is elastically biased by a coil spring or the like so that a gripping force is applied to the contact surface of the belt-shaped object via the support shaft.

In order to grip the winding start end of the belt-like object by sandwiching the eccentricity, hold the edge of the belt-like object protruding from the tip of the traverse arm that has returned to the vicinity of the predetermined edge of the paper tube, etc. The gripping portion of the piece is opened in advance by the action of the releasing means, and in this opened state, the end of the belt-like object guided by the traverse arm slides on the surface of the paper tube, etc. By stopping and releasing the releasing means provided outside the rotating system in response to this stop signal, the winding start end of the belt-like material on the surface of the paper tube or the like is gripped by the elastic force of the holding piece itself.

The gripping force of the holding piece is released just before the start of winding and after the winding is finished, because the holding piece is attached to a predetermined position on the outer circumference of the paper tube or the like, the releasing means is operated in correspondence with the position of the holding piece. It has a configuration that can.

Therefore, a proximity sensor detection plate or the like is fixed to the flange that rotates in synchronization with the winding shaft, the position is detected by a proximity sensor or the like provided outside the rotation system, and the sensor is stopped at a position rotated by a predetermined angle from this sensor position. Thus, the holding piece and the releasing means can be associated with each other.

Next, the structure of a specific apparatus for carrying out the method of the present invention will be described with reference to the drawings.

1 to 7 show a concrete winding device used in the method of the present invention.

1 shows the driven side flange and the releasing means omitted, but in the figure, 1 is a winding device main body, 2 is a delivery roller stand, and a packing band B made of synthetic resin.
Is fed from a feeding position (not shown) to the apparatus main body 1 through the feeding roller stand 2, and is sandwiched between the driving side flange 3 and the driven side flange 20 provided on the apparatus main body 1.
It is wound around the outer periphery of the with a predetermined tension.

The device body 1 is arranged on the frame 5 so as to be rotatable and movable left and right between a steady winding position and a standby position for holding the paper tube, and a winding shaft 6 for rotating the drive side flange 3. A main drive motor 7 in the frame 5 for rotating the winding shaft 6 at high speed via a pulley and a belt,
Hollow sheath traverse arm 8a holding the band B
Traverse cam 8 for alternately moving the sheet to the left and right, a chute 9 for supplying the paper tube 4, and a wound package P
In addition to the sticking device 10 for sticking a label to the outer circumference of the paper, the discharge chute 11 for the package P, and the product receiving plate 12, the paper is placed on the paper tube 4 outside the rotation system of the winding shaft 6. Band B
It has a mechanism for gripping and releasing the winding start end.

This mechanism includes a notch 20 that is pivotally supported on the end surface of the driven side flange 20 and has one end formed in the flange 20.
An L-shaped holding piece 21 opposed to the surface end of the paper tube 4 through a, and the holding piece arranged on the end surface of the flange 20.
A spring body 22 that is in sliding contact with the other end side of 21 to press and urge one end side of the holding piece 21 to the front side of the paper tube 4;
The gripping release cylinder 23 is fixed so as to face the spring body 22 with the holding piece 21 interposed therebetween, the detection plate 24 provided on the end face of the flange 20, and the proximity sensor 25 for detecting this.

Further, one end portion which is a gripping portion of the holding piece 21 has a taper shape, which facilitates detachment when releasing the grip. The spring body 22 is composed of a compression coil spring 22a embedded inside the flange 20 and an actuator 22b provided at the tip of the spring 22a. One end of the holding piece 21 is constantly urged to contact the front side of the paper tube 4.

The drive system of the winding shaft 6 is used for low speed drive for aligning the spring body 22 and the cylinder 23 in addition to the main drive motor 7 for rotationally driving at high speed during winding. The motor 26 is provided, and the rotation transmission of each of the motors 7 and 26 is switched by changing the gear train wheel.

As described above, the two drive systems are used because the total weight of the package P is as heavy as about 10 kg, and when the package P is rotated at a normal high winding speed, the inertia is large and the brake capacity for stopping the package is large. This is because the low-speed drive motor 26 of another system and its switching mechanism are provided so that the positioning can be stopped by the brake having a relatively small capacity.

FIG. 7 shows an example of the switching mechanism.
Is a driving gear connected to the rotation shaft of the main drive motor 7 via a belt, and the driving gear 27 transmits rotation to the gear 30 of the winding shaft 6 via gears 28 and 29.

Further, a gear 31 is provided coaxially with the gear 28, and the rotation is transmitted to the gear 33 provided on the drive shaft of the traverse cam 8 via the gear 31 and the gear 32. 6 and rotates the traverse arm 8a back and forth in the left-right direction.

On the other hand, the output shaft of the low-speed drive motor 26 is connected to the driving shaft via the clutch 26a, and this gear 34 transmits the rotation to the gear 30 of the winding shaft 6 via the gear 35.

The main drive rotation transmission gear 29 is an arm 29a.
The rotation of the main drive motor 7 is transmitted to the take-up shaft 6 and the traverse cam 8 side in the meshed state shown by the solid line, because the gears 29 and 30 are intermittently connected according to the movement thereof. Then, the winding operation of the band B is performed while rotating both of them synchronously.

On the other hand, during the winding operation, the clutch 26 of the low-speed drive motor 26
a is cut off and gears 34 and 35 run idle.

When the driven flange 20 is positioned, the gear 29 moves to the imaginary line position, the rotation transmission system for main drive is disconnected, and at the same time the clutch 26a of the motor 26 is engaged, and the winding shaft 6 rotates at a low speed this time.

When the detection plate 24 approaches the proximity sensor 25, the sensor 25 detects this and stops the positioning of the motor 26 with a predetermined delay.

This stop position is a position where the plunger 23a of the cylinder 23 just faces the spring body 22. Therefore,
When the cylinder 23 is driven in this state, the holding piece 21 is pressed, and one end of the holding piece 21 is detached from the surface of the paper tube 4 as shown by the imaginary line in FIG. 6 (b).

Next, the procedure from the winding start to the completion of the package P having the above configuration will be described.

First, as the band B to be packaged, polypropylene is melt-extruded into a rectangular shape, and a band-shaped material obtained by stretching the polypropylene at a predetermined ratio is passed through a pair of rollers having oblique unevenness to form an embossed-shaped apparent thickness. A polypropylene packing band with a width of 0.6 mm and a width of 12.0 mm.

Initially, the take-up shaft 6 retracts to the standby position together with the drive side flange 3, and in this state, the paper tube 4 is supplied to the take-up position from the supply chute 9 and is located at the upper position.
Is held.

After this feeding operation, the take-up shaft 6 advances together with the driving side flange 3 and clamps and fixes both ends of the paper tube 4 with the driven side flange 20. At this stage, both flanges 3 and 20 are in the braked state, and the holding piece 21 is the flange.
It is located on the upper side of 20, and the plunger 23a of the cylinder 23 projects and is in a state where the grip is released.

When the traverse arm 8a is stopped at the turning point after the fixing of the paper tube 4 and the tip of the band B, which is the fusing end portion at the time of the previous winding, is projected from the tip of the arm 8a, the winding start end is It is located at the end of the outer peripheral upper surface of the paper tube 4.

At this stage, one end of the holding piece 21 is separated from the surface of the paper tube 4, so that the starting end of the band B automatically enters the gap formed between the holding piece 21 and the paper tube 4. Become.

By retracting the plunger 23a of the cylinder 23 in this state, one end of the holding piece 21 comes into contact with the surface of the paper tube 4 as shown by the solid line in FIG. 6 (b), and the band B is pressed by the spring pressure of the spring body 22. The start end of the paper is gripped between the paper tube 4.

In response to the backward movement of the cylinder 23, the above-mentioned gear group is switched to the main drive motor 7 side, and when this is rotationally driven, the band B
Is wound while reciprocating around the outer circumference of the paper tube 4.

When the winding operation is completed, the motor 7 is stopped, the sticking device 10 is driven to melt and cut the winding end portion, and at the same time, the label is stuck and the winding end portion of the band B is fixed to fix the package P. Complete.

Since the detailed mechanism and operation of the sticking device 10 are disclosed in Japanese Utility Model Publication No. 54-43147 previously developed by the present applicant, the description of that part will be omitted.

After that, if the gear group is switched to the motor 26 side, the package P is rotated at a low speed, and the motor 26 is stopped by the detection of the proximity sensor 25, the holding piece is positioned at the original upper position again, and it is positioned at the tip of the cylinder 23. opposite.

When the plunger 23a is projected in response to this stop signal, the holding piece 21 is separated from the paper tube 4 as shown by the imaginary line in FIG. 6, and the gripped state is released. At this time, although it is difficult to release due to the frictional force of the wound band B, one end of the holding piece 21 has a taper shape and is elastically released from the band B.

After that, when the winding shaft 6 is retracted together with the flange 3 and is positioned at the standby position, the held state of the package P is released, and as the product receiving plate 12 descends, it is transferred to the discharge chute 11 side and wound up. One cycle is finished and the next package P is ready for winding.

<< Effects of the Invention >> As described in detail with reference to the embodiments above, in the method for winding a synthetic resin strip according to the present invention, the strip is formed by the gripping force of the sandwiching piece from the beginning of winding to the end of winding. The winding start end is securely fixed, and the winding start end can be maintained in a fixed state by winding the strip even if the holding piece is released after the winding.

Therefore, according to the present invention, the starting end portion of the synthetic resin strip can be fixed to the accessory or the winding core without bending,
In particular, it is possible to provide a structure suitable as a package for continuous automatic packaging which has been recently developed.

Further, in the winding device used in the method of the present invention, the traverse arm that returns to the end edge of the winding core before the start of the winding operation and the flange that rotates in synchronization with the winding core are disposed, and the synthetic resin strip is wound. Since the gripping piece for gripping the starting end with the winding core by elastic force and the means for releasing the gripping force of the gripping piece outside the rotating system are provided, the structure is simple. The winding method can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing the overall structure of a winding device for synthetic resin strips according to the present invention, FIG. 2 is a perspective view of the winding device body, and FIG. III-III sectional view of the figure, FIG.
FIG. 5 is an enlarged view of part A of the figure, FIG. 5 is an enlarged cross-sectional view of line VI and −VI in FIG. 3, FIGS. 6 (a) and 6 (b) are enlarged views showing a gripping portion and its releasing mechanism, and FIG. It is explanatory drawing which shows the switching mechanism of a main drive motor and a low speed drive motor. DESCRIPTION OF SYMBOLS 1 ... Winding device main body, 3 ... Drive side flange 4 ... Paper core (core), 6 ... Winding shaft 7 ... Main drive motor, 8 ... Traverse cam 20 ... Driven side flange, 21 ... Holding piece 22 ... Spring body , 23 ... Cylinder (release means) 24 ... Detection plate, 25 ... Proximity sensor 26 ... Low speed drive motor

Claims (3)

[Claims] 1. A method for winding a synthetic resin strip while traversing the outer periphery of a winding core fixed to a winding shaft, wherein a winding start end of the synthetic resin strip is an edge of a hollow core surface. A method for winding a synthetic resin band-shaped article, which is characterized in that the winding is started after being gripped by the sandwiching piece. 2. The winding method according to claim 1, wherein the holding piece is released after the predetermined amount of the synthetic resin strip is wound up. 3. A traverse arm that returns to the edge of a hollow winding core before the start of winding operation and a flange that rotates in synchronization with the winding core. Winding up of a synthetic resin belt-shaped article, comprising: a sandwiching piece that is gripped by an elastic force with the outer surface, and means for releasing the gripping force of the sandwiching piece outside the rotating system. apparatus.