JP2500549B2 - Film supply device for packaging in packaging machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping film supplying device in a wrapping machine, and more particularly to an improvement of a film holding means during a cutting operation of a cutter device following a film drawing of a film drawing device.

[0002]

2. Description of the Related Art Conventionally, a film feeding guider disclosed in Japanese Patent Laid-Open No. 52-134584 is known as a packaging film feeding device having a film holding means when the film is cut. The delivery guide is shown in FIG.
As shown in FIG. 7, it comprises an upper feed guide plate 54 and a lower feed guide plate 53, and each guide plate is provided with reverse rotation preventing rollers 51, 52 which are rotatable in one direction. Is provided with continuous concave and convex guide portions 53a and 54a, the upper feed guide plate 54 presses the rollers 51 and 52 against each other by a spring 50B, and a gap is formed between the guide portions of the upper and lower feed guide plates. The film fed from the film roll is pressed and nipped by the rollers 51 and 52,
The tip thereof is located at the tip of the guide portion.

However, in the conventional apparatus, the film is sandwiched between the rollers 51 and 52, but the guide portion 5 is used.
3a and 54a have a structure in which the leading end of the film is not held. Therefore, when the film pulled out from the guide portion is cut by a cutter, the film remaining in the guide portion is guided by the tension generated in the film when the film is pulled out. When the film is pulled out by the film pulling device next time, the gripping member makes it difficult to grip the tip of the film. There is a problem that it is difficult to hold the leading edge of the film by the member, and the packaging operation is not performed reliably because the packaging machine runs idle.

The present invention solves the above-mentioned problems of the prior art, the film tip after cutting is held securely at a predetermined position, and the next film pull-out operation is performed smoothly and surely, so that the packaging workability is high and the structure is high. An object is to provide a simple film supply device.

[0005]

According to the film supply device of the present invention, the leading end of the packaging film fed from the film roll is held by the supply frame, and the leading end of the film is held by the holding member of the film drawing device. In a packaging film supply device in a packaging machine that pulls out to the packaging position and pushes up and cuts the film with a cutter device arranged near the tip of the supply frame, the supply frame is vertically spaced at a predetermined interval, and the tip is It is composed of upper and lower guide plates formed in the shape of concavo-convex teeth, the inner surface of the guide plate is subjected to a treatment for improving the adhesion of the film, and the film tip on the film roll side separated during the cutting operation of the cutter device is attached. The feature is that the inner surface of the guide plate is adhesively held.

[0006]

According to the present invention, the leading edge of the film held between the upper and lower guide plates is grasped by the grasping member of the film drawer and pulled out to the packaging position, and then the film is pushed up and cut by the cutter. The tip of the film in the guide plate is adhesively held on the inner surface of the guide plate by the push-up operation of the device, the tip of the film and the tip of the guide plate substantially coincide with each other, and the film tip does not hang down through the recess of the guide plate. In the film drawing step, the holding member of the film drawing device surely holds the leading end of the film.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. In FIGS.
C is an elevator conveyor device, D is a film supply device, E is a film drawing device, F is a film clamp device, G is a film folding device, and H is a carry-out conveyor device.

The supply device A is detachably arranged on the front surface of the main body frame 1, and is provided with a supply conveyor 2 to work with the width-shifting device 3 attached to the main body frame 1. The supply conveyor 2 is a belt conveyor that carries the product a into the main body frame 1, and is rotated by power transmission via the motor M1, the timing pulley 4 and the timing belt 5. The supply conveyor 2 is constantly driven by the motor M1 being activated when the power is turned on, and is temporarily stopped when the commodity detector 6 installed at the conveyance end portion of the conveyor detects the commodity a being conveyed. Then, the width adjusting device 3 is operated.

As shown in FIGS. 1 and 2, the width-shifting device 3 attached to the carry-in entrance of the main body of the packaging machine has opposing sides 7a of a timing belt 7 rotated by a motor (not shown).
The width-shifting plates 8 and 8 are hung down on 7b with a left-right interval so that both width-shifting plates 8 and 8 approach or separate at the same time toward the widthwise center of the supply conveyor 2 by the rotation of the belt 7. At the same time, the amount of movement of the timing plate 9 that moves together with the width-shifting plate is detected by the sensor 9 '.
When the approaching plates 8 and 8 approach each other, they come in contact with both side edges of the product a which has reached a predetermined position on the supply conveyor 2 and stopped, and more specifically, the product a is conveyed in a state of being displaced from the center of the supply conveyor 2. Even when the product is abutted, one of the width-shifting plates 8 hits the product a first and shifts the product a toward the center, and finally both width-shifting plates 8 and 8 come into contact with both side edges of the product a. Move to the center position (centering). The width dimension of the product a is determined by detecting the time when the width-shifting plates 8 and 8 come into contact with both side edges of the product a with a sensor (not shown) and measuring the moving distance of the timing plate 9 to that point. Is detected, the timing belt 7 is rotated in the reverse direction to move the width-shifting plates 8, 8 in the direction of separating them and return them to the original position.

The width-shifting device 3 is disclosed in the applicant's prior application (Japanese Patent Laid-Open No. 63-96008).

The weighing conveyor device B is arranged after the supply device A, and comprises a belt conveyor 10 and a weight detector 11 having a weighing pan 11 '.

The belt conveyer 10 is constructed by arranging a plurality of endless belts rotatably between the weighing pans 11 'formed in a divided shape, and the front end thereof is arranged in the vicinity of the rear end of the supply conveyor 2. , After centering, supply conveyor 2
And receives the product a conveyed by
Move it up. Further, the belt conveyor 10 is connected to the arms 13, 13 ... Which are rotated by an air cylinder 12, and can be moved up and down by the rotation of the arms 13, 13 ... At the upper moving position, the upper side of the belt conveyor 10 is weighed. It should be located above the pan 11 'and below the weighing pan 11' in the down position. Therefore, the belt conveyor 10 is in the upper movement position and is in a state where the product can be conveyed, and the product a is weighed by the descent of the product a by descending.
1'is loaded and weighed by the weight detector 11.
A product detector 14 is installed above the rear part of the weighing pan 11 ′, and when the detector 14 detects the product a reaching the weighing pan 11 ′ by the belt conveyor 10, the cylinder 12
Is operated to lower the belt conveyor 10, and the weighing pan 1
At the same time as it is placed on 1 ', the weighing operation of the product a is performed.

Further, a plurality of detectors 15 and 15 'consisting of transmissive sensors are installed at a vertical interval above the front end of the belt conveyor 10, that is, at the entrance of the weighing conveyor device B, and a product a is supplied to the conveyor. When moving from 2 to the belt conveyor 10, the height of the product a is detected depending on which of the detectors 15 and 15 ′ performs the detection operation. Further, the length of the product a is detected by measuring the time until the front end of the moving product a is detected by the lower detector 15 ′ and then the detector 15 ′ detects the rear end of the product a.

Therefore, while the product a is conveyed from the supply conveyor 2 onto the weighing pan 11 ', the product width is detected by the width-shifting device 3, and the height and length are detected by the detectors 15 and 15'. When detected, the elevator head of the elevator / conveyor device C, which will be described later, the film selection of the film supply device D, the selection of the film drawing amount of the drawing device E, and the setting of the clamp position of the clamp device F are detected based on the detection results. And the film folding condition, that is, the operation timing of the clamp device F is determined. In the embodiment, the case where the product width, height and length are discriminated in two steps, large and small, will be described, but it is also possible to detect them in more steps and control the command.

The elevator / conveyor device C is arranged following the measuring / conveying device B, and is composed of a conveyor 16 and an elevator mechanism 19 having an elevator head 17 and a supporting rod 18.

The conveyor 16 is rotatably installed by arranging a plurality of endless belts at intervals, and the belts are alternately arranged so that the front end portion thereof overlaps the rear end portion of the belt conveyor 10. The drive shaft 20 driven by the motor M2 is used as a common drive source so that both conveyors 10 and 16 simultaneously rotate or stop. This conveyor 16 is the weighing pan 1 of the weighing conveyor device B.
The merchandise a, which has been weighed on 1 ', is inherited from the rear end of the merchandise conveyed by the belt conveyor 10 and is transferred to the elevator head 17.

The elevator heads 17 are divided and arranged between the belts of the conveyor 16 and the articles a conveyed on the heads 17 are moved up and down as the supporting rods 18 connected through the supporting members are moved up and down. Is to be raised to the upper wrapping portion R for wrapping. The elevator head 1
A stopper 21 is arranged upright at a certain interval behind 7 so that the product a introduced onto the elevator head 17 by the conveyer 16 is positioned in a correct posture with its front end abutting against the stopper 21. Then, the product a is stopped, that is, the front end of the product a is positioned and introduced onto the elevator head 17.

In the elevator mechanism 19, the support rod 18 is moved up and down by an elevator drive mechanism 19A such as a cam 22, a cam follower 23 and a swing arm 24.

The film supply device D is arranged at the back of the main machine frame 1 and is made of a stretch film as a packaging material in a roll shape.
25B and a supporting roller 9 for supporting this film roll
0a, 90b and film feeding rollers 26a, 26b
And a supply frame 27 having two supply ports 27a and 27b (FIGS. 1 and 3). Film roll 2 above
The films 25a and 25b pulled out from 5A and 25B are supplied to the supply frame 2 via the feeding rollers 26a and 26b, respectively.
The tips are held by the respective supply ports 27a and 27b of No.7.
This supply frame 27 moves up and down by an air cylinder 28,
Film 25a or 25b selected in relation to product width
The supply ports 27a and 27b are moved to predetermined supply positions. The supply ports 27a and 27b are comb-shaped with concavities and convexities formed continuously, and facilitate the gripping of the film by a film drawing device described later.

The feeding rollers 26a and 26b are provided from the film roll 25A or 25B to the film 25a or 25.
A roller for pulling out b, a driving timing belt 29a and a timing pulley 29b of a film pulling device which will be described later, and a chain 29c for transmitting the power of the timing belt 29a to the feeding rollers 26a, 26b via an electromagnetic clutch 29d. Feeding roller 26
When a and 26b are rotated, the support rollers 84a and 84b are driven by the rubber belt via the electromagnetic brake 29e, and the feeding rollers 26a and 26b are rotated and the film roll 2 is rotated.
Rotate 5A and 25B to feed the film. After the feeding is completed, the electromagnetic brake 29e is prevented from returning the film, and the electromagnetic brake 29e is braked in the non-excited state. Therefore, even when the main power supply is cut off, the leading end of the film at the film supply port can be held. Therefore, the next film can be smoothly fed out. The supply port 27
The surfaces a and 27b are subjected to a surface treatment such as mirror finishing to improve the adhesion of the film in order to hold the film tip after cutting the film at the tip of the supply port. Further, the film feeding rollers 26a and 26b are also the film rolls 25A and 25A.
In order to surely feed the films 25a and 25b from B, a surface treatment for improving the adhesion of the film is applied.

The film drawing device E is arranged in the front portion of the main body machine frame 1 facing the supply frame 27 of the film supplying device D, and is based on the rotation of the feeding cam 70 fixed coaxially with the cam 22. A swingable arm 30 is connected to a gripping member 31 that can be opened and closed. The gripping member 31 has a comb-shaped tip end corresponding to the supply ports 27a and 27b, and reciprocates toward and approaches the supply frame 27 by the swing of the arm 30 and reciprocates. The supply port 27a or 27 located near the supply frame 27 at the supply position
The front end of the film 25a or 25b of b is gripped by the closing operation, and the film of a predetermined length is pulled out by the backward movement. In addition, the drawer device E includes the arm 30 and the cam 7.
The pull-out amount control mechanism 32 is interposed between the product 0 and
The retracted position of the gripping member 31 is set according to the film withdrawal amount set by detecting the height and length of the film. The film drawn by the drawing device E is cut by the cutter 33 installed immediately before the supply frame 27 and separated from the succeeding film. The film drawing device E will be described in more detail later. The film clamp device F clamps and supports the rear edge and both left and right edges of the film 25a or 25b pulled out by the pulling-out device E.
1 and 3, the rear clamp contact plate 34, the left and right clamp contact plates 35, 36, and the air cylinders 37, 38a, 38b.
And clamp plates 34a, 35a, 36a that move up and down to come into contact with and separate from the contact plates 34, 35, 36. The left and right clamp mechanisms 35, 35a, 36, 36a are configured so as to be capable of approaching or expanding a predetermined amount in the width direction by the motor M3, levers 39, 39 'and timing disc 40 shown in FIG. The film 25a, 25b is selected in accordance with the width detection of the product a by the width-shifting device 3, and at the same time, the clamp mechanism 35, 35a, 36, 3 is selected.
The width position of 6a is set.

The folding device G is arranged above the film drawn by the drawing device E to form a wrapping part, and is opened and closed in the width direction by the driving parts 41 and 41 'as shown in FIGS. The left and right folding plates 42 and 42 'that move, the front folding plate 44 that reciprocates back and forth by the drive unit 43 and the lever 43a, the pusher 46 that reciprocates back and forth by the drive unit 45 and the lever 45a, the rear folding roller 47, and the up and down swingable. The upper surface pressing member 48 is used. The upper surface pushing member 48 is attached to the upper surface of the inside of the lid case by the parallel link mechanism, and when the lid case is opened, the holding member 48 also rises together with the lid case, which facilitates maintenance and inspection around the packaging position and cleaning. Further, the parallel link mechanism enables the height of the lid case to be pushed low. Further, since the object to be packaged is pressed from directly above, it is possible to maintain a stable state even when the pusher and the folding plate are operated. The folding device G is configured such that the left and right folding plates 42, 42 ', the front folding plate 44, and the pusher 46 are sequentially operated by a known packaging operation.
Alternatively, the product a is stretch-wrapped by 25b, and the packaged product a ′ is discharged to the carry-out device H by the pusher 46, that is, the packaged product a ′ is discharged in the same direction as the carry-in direction of the product a. is there.

The carry-out device H forms a carrying path for carrying out the packaged product a ', and is arranged at the upper rear portion of the main machine frame 1 and discharged to the carry-out port of the packaging section R. Is carried out to a predetermined position, and a label printer is printed on the product a ′ with the required data printed on the product a ′ during the transportation.

Further, in FIG. 1, reference symbol M is a main motor, and 6
Reference numeral 1 is a main timing disc, and its main motor M outputs a weighing stability signal when the weight detector 11 of the weighing conveyor device B has finished weighing the product a, that is, when the main motor M is stopped. When the main timing board 6
1, the weighing conveyor device B, which is the main body of the packaging machine,
The timing of each operation unit of the elevator / conveyor device C, the film supply device D, the drawing device E, the clamp device F, the folding device G, and the carry-out device H is controlled. Specifically, for the product a, the product width is detected by the width adjusting device 3 of the supply device A, and the height and length of the product are detected by the detectors 15 and 15 ′ of the weighing conveyor device B. Based on the selection of the auxiliary elevator head, the selection of the film rolls 25 and 25 'to be supplied, the determination of the left and right clamp positions, the operation timing of the left and right clamp plates 35a and 36a,
In addition to controlling the operation timing of each part such as the control mechanism of the film withdrawal amount, the main timing disc moves the belt conveyor 10 up and down, the cutter 33, and the left and right folding plates 4.
2, 42 ', the operation of the front folding plate 44, the pusher 46, the activation of the carry-out roller conveyor 50, and the like, to control the operation timing of the packaging mechanism unit. The upward movement of the belt conveyor 10 of the weighing conveyor device B is activated by the output of the weighing stability signal of the weight detector 11 and the main timing plate 61 to convey the product a in the direction of the conveying conveyor 16; The drive motor M1 of the supply conveyor 2 does not start unless centering is completed by the width aligning device 3.

In the above embodiment, the product a is carried into the supply conveyor 2 at the start timing of the main motor M,
It will be understood that the timing until the weighing is completed has nothing to do with the timing of the packaging machine body thereafter. Therefore, the supply device A can be freely changed according to the usage conditions of the packaging machine, for example, the packaging machine can be arranged in an automated line.

In FIG. 4, reference numeral 62 is a console section for inputting required data and commands, and the feeder A
It is installed on the upper surface of the side edge of the main body machine frame 1 so as to face a worker located in the vicinity.

Next, FIG. 4 is a side view (left side view) on the side opposite to FIG. 1, whereby the film drawing device E will be described in detail.

In the figure, reference numeral 32 is a film withdrawal amount control mechanism for adjusting the amount of rotation of the withdrawal arm 30 connected to the film gripping member 31. The control mechanism 32 includes a cam 70 mounted coaxially with the cam shaft 22b for rotating the cam 22, a main arm 71 swinging by the cam 70, a control arm 72, a link 72a, an auxiliary motor 73 as a power source, and a timing belt 74. And a fixed position detector 82 of the control arm 72.

The lower end of the main arm 71 is pivotally attached to the bottom of the main body frame 1 so as to be swingable, and the cam floor 75 attached to the substantially central portion is engaged with the cam groove 70a of the cam 70 to cause the cam to move. Rotate 70 to move forward and backward (left and right in Figure 4)
Rock to. One end of a control arm 72 is connected to the upper end of the main arm 71 by a rotating shaft 76, and a link 72a is rotatably connected to the other end of the control arm 72, and the main arm is connected via the control arm 72 and the link 72a. The arm 71 and the drawer arm 30 are connected.

The control arm 72 and the link 72a are rotatably connected by a shaft 77, and when the control arm 72 rotates with the rotation of the rotary shaft 76, the crossing angle between the control arm 72 and the link 72a is changed. Instead, the distance between the both ends expands and contracts to adjust the distance between the main arm 71 and the pullout arm 30.

The auxiliary motor 73 is installed in the vicinity of the lower end of the main arm 71, a timing pulley 78 is attached to the motor shaft 73a thereof, and the timing belt extends between the pulley 78 and the timing pulley 79 attached to the rotary shaft 76. 7
4 is wound, and the rotation shaft 76 is rotated via the timing belt 74 by driving the auxiliary motor 73.

A fixed position detector 82 is arranged near the timing pulley 78, and the flag 8 attached to the motor shaft 73a is used.
By detecting 3, it is detected that the pull-out arm 30 is maximally separated from the main arm 71. The lower end of the pull-out arm 30 is rotatably erected on the bottom of the main body frame 1 by a support shaft 80, and the upper end of the pull-out arm 30 is connected to the grip member 31 via a link 81. It is slidably supported by guide members 100, 100 that extend horizontally to, and horizontally reciprocates in the direction of the film supply device D in conjunction with the swing of the drawer arm 30.

The drawer arm 30 is placed at the initial position P in FIG. 4 and is on standby. At this initial position, the main arm 71 is at the most returned position (right side in the drawing). The control mechanism 32 includes a control arm 72 and a link 72.
The fixed position detector 82 is set to a state in which the fixed position detector 82 detects the flag 83 at the fixed position of the drawer arm 30 in which a and maximally extend (state of the two-dot chain line in the figure). When the cam 70 rotates, the pull-out arm 30 swings to the film pull-out position (Q position in the drawing) to move the gripping member 31 to the film feeding position of the film feeding device D, and the gripping member 31 feeds at that position. The film 25a or 25b thus formed is gripped. This film is grasped and pulled out by the timing of the main timing disc when the main arm reaches the foremost end by the cam 70, the detection of the flag 83 of the fixed position detector 82, and the end of the weighing of the object to be packaged. The arm 30 returns to pull out a certain amount of film.

When the gripping member 31 grips the film, the main arm 71 is swung by the rotation of the cam 70, so that the pull-out arm 30 swings in the backward direction and the auxiliary motor 7 moves.
3 starts rotating in the counterclockwise direction (reverse rotation), and rotates until reaching the timing position of the main timing disc 61 corresponding to the film withdrawal amount set by the height and length detection of the product a, and then stops.

Therefore, although the main arm 71 swings a certain stroke by the rotation of the cam 70, the pull-out arm 30
In the return path of (3), an amount corresponding to the rotation angle of the control arm 72 due to the rotation of the auxiliary motor 73 is swung, and the film withdrawal amount due to the return movement of the gripping member 31 is adjusted.

After that, when the left and right and front folding operations by the folding device G are started, the pull-out arm 30 returns to the initial position as the cam 70 rotates. However, when the main arm starts the swinging movement, the auxiliary motor 73 causes the clock to move. The control arm 72 is rotated in the direction until the fixed position detector 82 detects the flag 83, and the pull-out arm 30 is in the initial state in which the pull-out arm 30 is most separated from the main arm 71.

In FIG. 4, it is easily understood that the solid line positions of the control arm 72 and the ring 72a indicate the maximum film drawing position, and the initial position P also corresponds to the minimum film drawing position.

Also, as is known from FIG. 4, the gripping member 31
Both ends of the above-mentioned timing belt 29a are hooked to the timing belt 29a, the timing pulley 29b, and the chain 29 when the gripping member 31 returns.
is transmitted to the feeding rollers 26a and 26b via c, and the film withdrawal amount of the gripping member 31 and the feeding roller 26a,
The film feeding amount by 26b is synchronized. The rotation speed of the feeding rollers 26a and 26b is slightly slower than the backward movement speed of the gripping member 31 to extend the film in a wrinkle-free state. The timing belt 29a also rotates when the gripping member 31 moves forward, but the power transmission at that time is interrupted by the excitation of the electromagnetic clutch 29d.

Further, the respective feeding rollers 26a and 26b are provided.
Is transmitted through pulleys 84a and 84b for driving supporting rollers 90a and 90b, which carry the film rolls 25A and 25B, and a round belt 85.
It supports the film feeding from A and 25B. still,
An electromagnetic brake 29 is attached to the feeding rollers 26a and 26b.
When the feeding rollers 26a and 26b are stopped, the rotation of the rollers 90a and 90b is stopped by the operation of the electromagnetic brakes 29e and 29e. Feeding roller 26
When a and 26b rotate, electromagnetic brakes 29e and 2
9e is excited to release the stop of the rotation of the rollers 90a and 90b.

5 to 6 show details of the grip member 31. The gripping member 31 connects the connecting member 102 across the sliders 101, 101 slidably mounted on the guide members 100, 100, mounts the upper fixed gripping plate 103, and faces the fixed gripping plate 103. The movable gripping plate 104 is attached to the lower surface so as to be vertically swingable. The tips of the fixed gripping plate 103 and the movable gripping plate 104 are comb-shaped.

The movable gripping plate 104 is divided into a central gripping plate 104a and left and right gripping plates 104b, 104b, which have substantially the same width, in a three-divided manner. The grip plates 104b and 104b are fixed to the rotary shaft 106 in a protruding shape.

The rotating shafts 105, 106 are connected members 10
2, the bearings 107 and 108 and the slider 101 attached to
The arm 1 is rotatably supported by a rotary shaft 105, and the rotary shaft 105 is connected to an arm 109 ′ operated by an air cylinder 109, and the rotary shaft 106 is operated by an air cylinder 110.
Connect to 10 '. The air cylinders 109 and 110
The central gripping plate 104a and the left and right gripping plates 104b can be separately swung via the rotating shafts 105 and 106. A grip member such as felt is bonded to the ends of the fixed grip plate 103 and the movable grip plate 104.

The gripping member 31 is the pull-out arm 30.
In the initial position of the movable grip plate 104,
That is, when both gripping plates 103 and 104 are on standby and reach the film gripping position by swinging of the pullout arm 30 (see FIG. 7), the film 25a at the supply port 27a or 27b of the film supply frame 27. Or 25b
The movable gripping plates 104a, 104b, 104b are simultaneously moved upward to be gripped by both gripping plates 103, 104.

In the film pull-out position, the gripping member 31 synchronizes with the left-right folding operation of the folding device G, and after the opening of the left-right gripping plates 104b, 104b first, synchronizes with the operation of the front folding plate 44 with a slight delay. Central grip plate 104
a is opened.

7 to 9 show the details of the film supply device D. As shown in FIG. The supply frame 27 is fixedly attached to the upper end of the rod of the air cylinder 28 with the lower guide frame 112 via a mounting plate 111.
An upper guide frame 113 is attached thereon, and a cover frame 114 is further attached on the upper surface of the guide frame 11.
The guide rollers 115 and 116 are disposed on the reference numerals 2 and 113, respectively.

A lower guide plate 112a is formed at the tip of the lower guide frame 112, and a lower guide plate 11 paired with the guide plate 112a is formed on the lower surface of the tip of the upper guide frame 113.
2b is formed, and the lower supply port 27b described above is formed by both guide plates 112a and 112b. Also, the upper guide frame 11
3, the upper guide plate 113a is formed at the tip of the cover frame 114, and the upper guide plate 113b which is paired with the guide plate 113a is formed at the tip of the cover frame 114, and the above-mentioned upper supply port 27a is formed by both guide plates 113a and 113b. . Incidentally, 117 and 118 in the figure are screws for adjusting the gap between the supply ports 27a and 27b.

The upper guide frame 113 and the cover frame 114 are openable and closable about a support shaft 119. When loading the film, both frames 113 and 114 are opened and the tip of the film 25a is guided onto the lower guide plate 112a. After supporting and supporting, the upper guide frame 113 is closed,
The leading end of the film 25b is guided and supported on the upper guide plate 113a, and then the cover frame 114 is closed. This makes the film loading operation extremely easy. The object to be packaged is detected, and the supply ports 27a and 27b are moved to the supply position by the cylinder according to the size of the object to be packaged. The tips of the upper and lower supply ports 27a and 27b form a continuous concavo-convex comb tooth shape in which the comb-shaped concave portion of the fixed grip plate 103 and the movable grip plate 104 and the convex portions of the supply ports 27a and 27b correspond to each other. ing.

The inner surfaces of the guide plates 113b and 112b facing the tooth tips of the cutter 33 are subjected to a mirror-finishing surface treatment such as buffing on the supply ports 27a and 27b, and as described above, the films 25a and 25b. Are made to stick easily. As a result, when the cutter 33 pushes up the film by the cutting operation of the cutter 33, the film at the supply port is pressed against the inner surfaces of the mirror-like guide plates 112b and 113b, and the film tip after cutting is adhesively held.
Since the film is not clamped by the elastic member, the loading property of the film becomes extremely easy. Therefore, the separated film tip can be held more reliably than in the conventional case, and a member such as a roller for holding the film is not required, and the structure is simplified and the cost can be suppressed.

7 to 9, reference numeral 120 is a side plate disposed on both sides of the supply frame 27, 121 is a guide rod protruding from the lower surface of the attachment plate 111 of the supply frame, and 122 is a guide rod 12.
1 is a guide member which slidably penetrates to guide the vertical movement of the supply frame 27, and 123 is the guide rods 121 on the left and right sides.
Is a connecting plate for connecting.

In the above embodiment, since the vertical movement distance of the supply frame 27 is made extremely small, the distance from the feeding rollers 26a, 26b to the tip of the supply frame 27 changes little, and the film is tensioned with almost no slack. Therefore, the finished product can be packaged regardless of the size of the object to be packaged.

[0051]

According to the present invention, when the film drawn by the film drawing device is cut by the cutter device, the tip of the film in the guide plate is adhesively held on the inner surface of the guide plate by the push-up operation of the cutter device. The leading end and the leading end of the guide plate are substantially aligned with each other, and further, it is possible to prevent the leading end of the film from hanging down through the recessed portion of the guide plate. Therefore, the gripping member of the film drawing device can surely grip the leading end of the film in the next film drawing process. Therefore, it is possible to prevent work interruption due to malfunction of the packaging machine and improve workability.

Further, since the inner surface of the guide plate is simply treated to improve the adhesion of the film, no special member such as a roller for holding the tip of the film after cutting is required, so that the structure is simple. It is possible to provide an inexpensive device.

[Brief description of drawings]

FIG. 1 is a side view showing the overall configuration of a packaging machine incorporating the device of the present invention,

FIG. 2 is a plan view taken along line II-II of FIG.

FIG. 3 is a plan view taken along the line III-III in FIG.

FIG. 4 is a side view of the opposite side of FIG. 1, showing the gist of the present invention,

FIG. 5 is a partially cutaway plan view showing details of a grip member.

6 (A) is a sectional view taken along line VI-VI of FIG. 5, FIG. 6 (B) is a right side view of FIG.

FIG. 7 is a partially enlarged side view of FIG. 4 showing a film supply device;

FIG. 8 is a partially omitted plan view of FIG.

9 is a front view of FIG. 7. FIG.

[Explanation of symbols]

25A, 25B ... Film roll 25a, 25
b ... Film 27 ... Supply frame E ... Film drawing device 31 ... Gripping member 33 ... Cutter 112a, 112b, 113a, 113b.

Claims (1)

(57) [Claims] 1. A wrapping film tip fed from a film roll is held by a supply frame, and the tip of the film is held by a holding member of a film drawing device to be pulled out to a wrapping position and disposed near the tip of the feed frame. In the packaging film supply device in the packaging machine that pushes up and cuts the film with the cutter device, the supply frames are vertically spaced apart from each other by a predetermined distance, and the tips are formed by upper and lower guide plates formed in the shape of concavo-convex teeth. A packaging machine, characterized in that the inner surface of the guide plate is subjected to a treatment for improving the adhesion of the film, and the leading end of the film on the side of the film roll separated during the cutting operation of the cutter device is adhered to the inner surface of the guide plate. Film supply equipment for packaging in Japan.