JP2002283279A - Packing film cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working efficiency by constituting a device of a simple structure for automatically cutting a long size film of a roll winding in the prescribed length, and easily and surely cutting the film having pressure sensitive adhesive work or material work on both ends when housing and packing fruit in a synthetic resin vessel by the film. SOLUTION: This packing film cutter sends out the roll-like film 2 arranged in a casing in the direction of an opening part 8 of the casing 1 by a feed roller 10 by driving of a motor, and is provided with a wide cutter 9 in the vicinity of the opening part 8 for cutting the sent-out film 2. An electric heating wire 22 is built in the cutter 9. The electric heating wire 22 is provided with the temperature distribution that both end parts 9b and 9b of the cutter 9 become a temperature higher than an intermediate part 9c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of storing fruits such as grapes and strawberries in a synthetic resin container and wrapping the upper open portion of the container with a film. The present invention relates to a packaging film cutting machine configured to cut automatically.

[0002]

2. Description of the Related Art A horticultural farmer, when shipping fruits such as grapes and strawberries, stores the harvested fruits in a synthetic resin container and wraps the upper opening of the container with a film. I have.

[0003] Films used for such packaging operations are:
A long film wound in advance in a roll is cut into a predetermined length for use. As shown in FIG. 8, adhesives 2b and 2b are applied on the back side of the film 2 along both ends in advance. The person covers the upper open portion of the synthetic resin container D containing the fruit with the cut film 2c, and attaches the adhesive 2b, 2b
Are attached to both sides of the container D.

In such work, quick manual work is required, but the work of cutting a long film into a predetermined length is troublesome, and if this work is performed with a cutter, extra work is required from the cut portion. In many cases, tearing occurs, and the cutter is dangerous for quick work. Further, the work by the cutter has a problem that cutting waste is generated at the time of cutting and adheres to the film surface.

Further, as shown in FIG. 9, when cutting a film having material processing 2d, 2d such as adhesive processing or folding at both ends of the film 2, portions which cannot be cut even by using an electric heating cutter are formed at both ends. In other words, the working efficiency is greatly reduced.

[0006] Some films are commercially available in a rolled state, and the cutting positions are marked at a predetermined pitch. However, when the elderly work in the dark of a farmhouse or the like, this marking is performed. However, there was a disadvantage that it was difficult to see.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and is intended for storing fruits such as grapes and strawberries in a synthetic resin container and wrapping them in a film.
A device that automatically cuts a long film in a roll with a predetermined length is constructed with a simple structure, and the work efficiency is improved by easily and surely cutting a film with adhesive or material processed at both ends. The present invention relates to a packaging film cutting machine as described above.

[0008]

According to a first aspect of the present invention, there is provided a film cutting machine for packaging a roll-shaped film provided in a housing by a motor-driven feed roller. While sending in the direction of the opening, in the vicinity of the opening in a film cutting machine for packaging provided with a wide cutter for cutting the film sent out, the cutter has a built-in heating wire, The heating wire has a temperature distribution in which both ends of the cutter are higher in temperature than an intermediate portion.

According to a second aspect of the present invention, there is provided a packaging film cutting machine according to the first aspect, wherein a heat insulating material is provided at both ends of the cutter, and the heating wire is wound around the heat insulating material. The temperature distribution is such that the temperature of the part is higher than that of the middle part.

Furthermore, in the packaging film cutting machine according to claim 3 of the present invention, the weight plate rotatably provided between the cutter and the feed roller according to claim 1 or 2 has its own weight. The motor is driven by a signal that senses that the film is turned upward by the pressure of the film pulled down and drawn in the direction of the opening, and the motor is driven by a reading signal of a marking provided on the film. The stop timing is set.

[0011]

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

As shown in FIG. 1, a housing 1 is provided with a lid 3 which is open at the top and which can be opened and closed by a hinge 3a. A safety switch 4 that is turned on and off by opening and closing the lid 3 is provided at the upper end of the housing 1. This safety switch 4 is turned off when the lid 3 is opened.
And functions as a safety device for cutting off the power of the motor 6 and the like. When the lid 3 is closed, the safety switch 4
N is applied and the motor 6 and the like are energized.

As shown in FIG. 1 or FIG. 2, two film rollers 5a and 5b rotatably supporting a roll R of a film 2 are provided near the bottom of the housing 1 in parallel with each other. (In the drawing, a film roller 5a), rubber rings 7, 7 are movably inserted at positions sandwiching the roll R from both sides so that the installation position of the roll R is fixed. I have.

As shown in FIG. 2, an opening 8 is provided in the film feeding direction of the housing 1, and a feed roller rotated by a motor 6 is provided between the opening 8 and the film rollers 5a and 5b. 10 are provided.

As shown in FIGS. 1 and 3, one shaft end 10a of the feed roller 10 is housed in a gear housing box 11 fixed to the inner surface near the opening 8 of the housing 1. The other shaft end 10b of the feed roller 10 is connected via a reduction gear 12 to a rotation shaft of a motor 6 fixed near the bottom of the housing 1, and a roller receiving plate 13 fixed to the opposite side of the gear box 11. It is rotatably supported on the shaft.

Further, a plurality of rubber rings 14, 14... Which are in close contact with the film 2 are inserted on the outer periphery of the feed roller 10 so as to prevent the film 2 to be fed from slipping.

A pressing roller 18 is provided above the feed roller 10. The holding roller 18 drops the support shafts 18 a and 18 b at both ends into a vertical groove 15 cut in the box 11 and the roller receiving plate 13 to make it detachable, and abuts on the outer periphery of the rubber ring 14 of the feed roller 10. It is rotatable in this state. The pressing roller 18 presses the film 2 against the plurality of rubber rings 14, 14... Of the feed roller 10 to improve the adhesion with the rubber rings 14, 14,.
Slip is prevented while the flat surface of the film 2 is maintained so that the film 2 is reliably fed.

Further, as shown in FIG.
An entrainment prevention plate 16 for preventing the entrainment of the film 2 is provided below the opening 8 of the housing 1 from the outer periphery of the housing 0.
The entanglement preventing plate 16 has a convex surface 16a formed on the upper side,
16a are attached to the outer periphery of the feed roller 10 while being inserted between the rubber rings 14, 14.

The film roller 5a and the feed roller 1
Between 0 and 0, there is provided a sensor 17 for reading the marking 2 a applied to the film 2 and sending a stop signal to the motor 6. This sensor 17 includes a transmitting unit 17 of an optical sensor.
a, and a receiving unit 17b. When the light emitted from the transmitting unit 17a is blocked by the marking 2a of the film 2, the passage of the marking 2a is detected and a stop signal is sent to the motor 6.

As described above, when the motor stop signal is sent from the sensor 17, the motor 6 is immediately stopped to stop sending the film 2. At this time, the stop timing of the motor 6 can be made variable by freely moving the sensor 17 along the feeding direction of the film 2 and fixing the sensor 17 at a desired position. It can be adjustable. For this reason, the sensor 1 of the housing 1
On the surface on which the film 7 is mounted, a long hole 23 having an inclination along the feeding direction of the film 2 is provided.
7c is fixed with a thumbscrew 20 along the elongated hole 23.

Further, in this embodiment, the sensor 17
The motor 6 may be stopped after a predetermined time by a timer (not shown) from when the marking 2a of the film 2 is read. In this case, since the stop timing of the motor 6 can be made variable by setting the timer, it is possible to adjust the cutting length of the film 2 without having to move the sensor 17 as described above. it can.

In this embodiment, as shown in FIG. 2, a cutter 9 having a built-in heating wire 22 is fixed near the upper end of the opening 8 so as to face the vertical direction of the drawing surface of the film 2. The cutter 9 has a support plate 24 fixed to the upper side surface of the opening 8 of the housing 1 with screws 8 b fixed to a lower end portion deformed along the inclined portion 8 a of the opening 8 with screws 24 a. Are mounted so as to protrude from the inclined portion 8 a of the opening 8.

By making the width of the cutter 9 in the longitudinal direction larger than the width of the film 2, the film 2 can be thermally cut at a time.

Further, the cutter 9 has a plan structure shown in FIGS. 6 and 6 corresponding to the cross section taken along the line AA, the line BB, and the line CC in FIG. In (c), the cutter 9
For example, the aluminum plate is folded back by the blade 9a, and the width of the folded piece 25 is made larger at both ends 9b, 9b of the cutter 9 than at the middle part 9c. The heating wire 22 inserted in the folded piece 25 along the blade 9a of the cutter 9 is wound around the heat insulating materials 26, 26 at both ends 9a, 9a while the heat insulating material 26 is interposed. The portions 9b, 9b have a temperature distribution in which the temperature is higher than that of the intermediate portion 9c.

Screw holes 28, 28 for inserting and fixing the screw 24a shown in FIG. 2 are formed in both right and left portions of the cutter 9, and lead wires led outward are provided at both ends of the heating wire 22. 27, 27 are connected.

In such a cutter 9, an intermediate portion 9c
Since both ends 9b and 9b have a higher temperature than the edge 9a of the cutter 9, the material is melted along the portion where the blade 9a contacts the film 2 and both ends 9b and 9b have adhesive processing or material processing. The film 2 can be easily and reliably cut at a melting temperature according to its thickness.

As shown in FIG. 2, a weight plate 19 is provided between the cutter 9 and the feed roller 10. As shown in FIG. 3, the weight plate 19 has a shape in which the concave shape is horizontally long and has a shape wider than the width of the film 2, and upper projecting pieces 19a, 19a at both ends of the weight plate 19 are held by pressing rollers. The pivot 18 is rotatably locked to the support shafts 18a and 18b on both sides thereof, and is normally suspended by its own weight as shown in FIG. As shown in FIG. 5, the weight plate 19 is provided at a position where its lower end protrudes slightly below a line L connecting the outer periphery of the rubber ring 14 of the feed roller 10 and the lower end of the cutter 9. Have been.

As shown in FIG. 2, a switch piece 21a of the switch 21 is
Is provided.

In order to set the film 2 in the packaging film cutting machine having the above configuration, as shown in FIG. 1, the lid 3 is opened and the safety switch 4 is turned off.
As shown in FIG. 2, the film 2 is pulled out from the roll R of the film 2 placed between the film rollers 5a and 5b,
From below the film roll 5a, the transmitter 17 of the sensor 17
a and the receiving roller 17b.
The end of the film 2 is put out from the opening 8 by hanging the outer periphery of the rubber ring of No. 0.

When a power supply switch (not shown) is turned on to cause a current to flow through the heating wire 22 of the cutter 9, the temperature of the cutter 9 rises, and the motor 6 is driven to rotate the feed roller 10. This causes the film 2 to start sending. When the motor 6 is stopped when the sensor 17 reads the marking 2a of the film 2,
The film 2 stops after being fed out of the opening 8 by a predetermined length.

In this state, when the operator holds the end of the film 2 by hand and pulls out the film 2 so as to come into contact with the cutter 9 as shown in FIG.
The switch 21 provided on the upper rotation side of the weight plate 19 is rotated by the
Is turned on, the switch 21 is turned on, a drive signal is sent to the motor 6, and the film 2 is sent out again.

On the other hand, substantially simultaneously with this operation, the film 2 that has come into contact with the cutter 9 is cut off by the above-mentioned heat melting, so that a predetermined shape of the film 2 is provided for the packaging operation of the operator.

When the film 2 is cut into the cutter 9, the end of the film 2 may adhere to the cutter 9 by heat welding. However, as shown in FIG. The weight plate 19 rotated upward is returned in the hanging direction by its own weight and the spring return force of the switch piece 21a, and is pressed to hit the film 2 attached to the cutter 9 to be detached from the blade 9a of the cutter 9. it can.

Thereafter, by repeating the above operation again, the film 2 continuously cut to a predetermined length is obtained.
c can be obtained.

[0035]

As described above, the packaging film cutting machine of the present invention automatically feeds a roll-wound film by driving a motor, and cuts the fed film at a contact portion of the cutter. Since the heating wire built into the cutter has a temperature distribution so that both ends have a higher melting temperature than the middle part, it is easy and sure to cut films with adhesive processing or material processing at both ends. Becomes possible.

[0036] Therefore, it is difficult to produce a cut portion as in the case of cutting with a normal cutter, and unnecessary temperature rise can be suppressed by providing a temperature distribution in the cutter. Is reduced, and further, there is an effect that adhesion of scum at the time of cutting is reduced.

Further, the film feeding is stopped by reading the markings on the film with a sensor, and the operator applies the film taken out of the opening to the cutter at this stop position, thereby causing the heating wire. The film is thermally cut by a cutter with a built-in, and at the same time, the motor is automatically operated by turning on the switch turned on by the rotation of the weight plate, so that it can be in a standby state for the next cutting work, so that the work can be performed. The operator installs a container to be film-wrapped near the opening, and if necessary, the operator applies the film to the cutter, so that a continuously cut film can be obtained and provided for the container packaging operation. .

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing the inside of a packaging film cutting machine according to the present invention with a lid opened.

FIG. 2 is a side view of the inside of a packaging film cutting machine according to the present invention.

FIG. 3 is a side view showing the inside of the opening side of the packaging film cutting machine according to the present invention.

FIG. 4 shows a packaging film cutting machine according to the present invention.
It is a partial side view showing the state where a film was applied to a cutter.

FIG. 5 shows a packaging film cutting machine according to the present invention.
FIG. 4 is a partial side view showing a state immediately after the film is cut.

FIG. 6 is a plan view of a cutter of the packaging film cutting machine according to the present invention.

7A is a sectional view taken along line AA of FIG. 6, and FIG. 7B is a sectional view of FIG.
FIG. 7C is a sectional view taken along the line B, and FIG. 7C is a sectional view taken along the line CC in FIG. 6.

FIG. 8 is a perspective view showing a situation in which the upper open portion of the container is wrapped with the cut film.

9A is a cross-sectional view of a film having both ends subjected to adhesive processing or folding processing, and FIG. 9B is a plan view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Film 2a ... Marking 2b ... Adhesive 2c ... Cut-off film 2d ... Material processing such as adhesive processing or folding of film 6 ... Motor 8 ... Opening 9 ... Cutter 9a ... Blade 9b ... Both ends of cutter Part 9c: Intermediate part of cutter 10: Feed roller 11: Box 12: Reduction gear 13: Roller receiving plate 14: Rubber ring 15: Vertical groove 16: Entrapment prevention plate 17: Sensor 18: Holding roller 19: Weight plate 22 ... Heating wire 25 ... Folded piece 26 ... Insulation material

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B65H 35/04 B65H 35/04 F term (Reference) 3C021 EA05 3C024 FF02 3E075 AA05 BA82 CA02 DB04 DB14 GA02

Claims (3)

[Claims] 1. A roll-shaped film provided in a housing is sent out in the direction of an opening of the housing by a feed roller driven by a motor, while a wide film for cutting the fed film is provided near the opening. In the packaging film cutting machine provided with a cutter, the cutter has a built-in heating wire, and the heating wire has a temperature distribution in which both ends of the cutter are higher in temperature than an intermediate portion. Film cutting machine for packaging. 2. A heat insulating material is provided at both ends of the cutter, and the heating wire is wrapped around the heat insulating material so that both ends of the cutter have a temperature distribution higher than an intermediate portion. Item 7. A packaging film cutting machine according to Item 1. 3. A weight plate rotatably provided between the cutter and the feed roller is suspended by its own weight, and is rotated upward by the pressure of the film drawn toward the opening. The package according to claim 1 or 2, wherein the motor is driven by a signal that senses the fact that the motor is driven, and the stop timing of the motor is determined by a reading signal of a marking provided on the film. For film cutting machine.