JP2519613B2 - Automatic connection device for packaging film - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to an automatic contact ZokuSo location of the packaging film in the bag manufacturing filling and packaging machine or the like, more particularly, two one original fabric roll original fabric roll to be used alternately the rear end portion of the drawn and are used films from relates automatically connected to that equipment the leading end portion of the film drawn from the other master roll.

[0002]

2. Description of the Related Art In a bag-making filling and packaging machine or the like, a roll body in which a packaging film is wound around a hollow core is loaded into a film supply device, and the film from the roll is fed out and supplied to a packaging mechanism side. There is. When feeding the film wound into a roll in this way and performing packaging, if the old roll (preceding use side) currently used is exhausted, a new roll (subsequent use side) is used. Need to be replaced promptly. A film connecting device generally called a splicer is suitable as a means for automatically joining (splicing) the film end of the old roll and the film start of the new roll without stopping the operation of the packaging machine during the film exchange. Is used for.

As a method for joining the old and new films, for example, the invention "Automatic splicing method for films for packaging machines" disclosed in JP-A-59-142921 and JP-A-61-1 is used.
There is an invention "method of connecting wrapping paper" according to No. 15820. Both methods include a dancer roller that stores the film in a running state on the downstream side of the old film, and stop the old film in the splicing zone while consuming the film stored in the dancer roller. It is a joint with a new film.

[0004]

SUMMARY OF THE INVENTION In the above-mentioned conventional connection method, in order to join the new film with the old film stopped without stopping the supply of the film to the wrapping mechanism, Since a dancer roller for storing a fixed amount of film is required, the mechanism is complicated and the manufacturing cost is increased.

Further, when the amount of film consumed in the packaging mechanism becomes larger than the amount of the film fed out from the roll body, the film accumulated in the dancer roller is consumed so that the film is always kept constant in the packaging mechanism. Configured to deliver a quantity of film. In this case, when the film accumulated in the dancer roller is consumed due to the above-mentioned factors and the old film and the new film need to be joined together, the film from the dancer roller to the packaging mechanism is transferred. Since the supply cannot be performed, the packaging machine itself has to be stopped, and it is pointed out that the operating rate of the packaging machine decreases.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems inherent in the connection of the old and new films described above, and is proposed in order to solve this problem without stopping the feeding of the old film. It is an object of the present invention to provide a means capable of automatically connecting the start end of a new film to the end of the film and also simplifying the mechanism.

[0007]

In order to overcome the above-mentioned problems and achieve the intended object, an automatic connecting device for a packaging film according to the present invention comprises a pair of original rolls wound with a packaging film. , A packaging film that connects the starting end of a new film drawn from the other original roll to the end of the old film that has been fed from one of the original rolls and has been used In this automatic connecting device , a pair of contacts facing each other across the film feeding path are provided.
A connecting mechanism is provided, and one connecting mechanism is rotatably supported.
And configured to be able to move close to and away from the other connection mechanism
The connection mechanism is used for feeding the film.
A pair of side plates spaced apart in the width direction intersecting the direction, and the side plates
It is rotatably installed in between and separated in the film feeding direction.
A pair of guide rollers positioned in parallel to guide the film.
Width of the film between the la and the pair of guide rollers
Are arranged in parallel with the side plate, separated from each other in the direction of film feed.
And a pair of guide rods extending in the
It is slidably mounted on the lid and can be moved in the film feeding direction.
Movable slide body and move integrally with the slide body
Drive installed on the slide body
By means, it is possible to move closer / separate to the other connection mechanism
And the holding body in the direction opposite to the film feeding direction.
An elastic member urged toward the holding member,
Set the starting end of the new film to the opposite holding body.
Holding means that can hold the surface
Film feed from roll to corresponding connection mechanism
The condition where the required tension is applied to the film in the path
Therefore, the holding mechanism for holding the film is provided.

In order to achieve the above object, an automatic connecting device for a packaging film according to another invention of the present application is a film
When there is a pair of original rolls wound with a packaging film with registration marks at predetermined intervals in the feeding direction, and one of the original rolls fed out from the original roll has been used up In the automatic connecting device for the packaging film, in which the starting end portion of the new film drawn from the other original roll is connected to the film end portion of the film, the film feeding path is provided so as to face each other across the film feeding path. Can be moved in the feeding direction, and the beginning of the new film can be fed to the film feeding path.
A pair of suction means capable suction-held surface directed to the
Move each suction unit closer / separated to the other suction unit
Driving means, an elastic member for urging each of the suction means in a direction opposite to the film feeding direction, and each of the original rolls.
The film feed path from the
Each of them has a filter that detects the passage of the end of the film.
Rum end detection means and the suction position of the suction means
It is arranged on the downstream side of the rum feeding direction and attached to the film.
A mark sensor for detecting a registration mark, wherein the raw low
It is arranged on the feed roller that pulls out the film from the
It consists of a encoder for detecting the feed amount of beam, the Fi
The rum end detection means detects the passage of the end of the old film.
After that, the mark sensor is
Based on the detection of the registration mark at the set predetermined position
Set the encoder to start pulse counting.
This encoder controls the preset number of pulses.
The drive means is energized on the condition that the
Then both suction means come close to each other and the start and end of both films
Sandwiching the part, the beginning of the new film and the end of the old film
, And connect the film with the old film
In the state that both suction means sandwiched are moving integrally,
When the encoder counts more pulses
To release the suction holding of the new film by the suction means.
At the same time, the drive means is biased in the opposite direction so that both suction means
By separating the old and new films by separating them from each other, the adsorption
Means is moved upward in the film feeding direction by the elastic force of the elastic member.
It is characterized in that it is configured to be pushed back to the flow side .

[0009]

[Function] The films are arranged so as to face each other across the film feeding path.
Old film is fed between a pair of holdersStatus
And direct the film feed path on one of the holders.
On the surface, keep the beginning of the new film pulled out from the original roll.
It is held by holding means. Old film is exhausted
When the end of the film reaches between both holders, both holders
The holders move closer to each other, and the end of the old film and the new film are moved.
Hold the start end of the rum and connect it. At this time,
Both holders move integrally with the old film due to the feeding force of the old film.
Move. Then, when both holding bodies move to a predetermined position,
Both holders move away from each other to release the film.
Then, the elastic force of the elastic member returns it to its original standby position.
You.A holding mechanism arranged upstream of the connection mechanism
Since the old film is pinched by the
Slack is prevented from occurring when the end of the film is separated.
It

In addition, a register is set at a predetermined interval in the film feeding direction.
When using a packaging film with a mark
Means that the film end detection means passes the end of the old film.
After detecting the
Upon detecting the registration mark at a predetermined position set in advance
Based on this, the encoder that detects the film feed amount
Start counting. And the encoder is preset
Assuming that the detected number of pulses is detected,
The drive means is urged to face each other across the film feeding path.
A pair of suction means arranged close to each other
The beginning and end of the new film are sandwiched between the beginning and end of the new film.
Is connected to the terminal end of the system. Holds the old film
Both suction means move integrally as the film is fed.
I do. The encoder also counts certain pulses
At this point, the suction holding of the new film by the suction means
At the same time, the drive means is biased in the opposite direction and both sides are attracted.
When the means are separated from each other and the old and new films are released,
The attaching means makes the elastic member elastically actuate the film in the film feeding direction.
It is pushed back to the upstream side.

[0011]

EXAMPLES Next, automatic contact of the packaging film according to the present invention
ZokuSo location per, by way of preferred embodiments, with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram showing an automatic packaging film connecting device according to an embodiment incorporated in a film feeding device incorporated in a known vertical bag-making filling and packaging machine. The film feeding device 10 is provided with two set shafts 12 and 14 provided in a machine frame 11 in an up-and-down relationship. The set rolls 16 are set on the set shafts 12 and 14, respectively, and upon the Fi Lum F is pulled out from the sheet roll 16, the brake applying means to prevent the excessive drawer is provided (not shown). Further, a guide roller 18 parallel to and adjacent to each of the set shafts 12 and 14 is rotatably supported, and the film F fed from the original roll 16 loaded on one of the set shafts 14 (12) corresponds thereto. It is adapted to be supplied to a packaging mechanism (not shown) via a guide roller 18 and an automatic connecting device 20 for packaging film (described later). Incidentally, the feed roller 22 which is disposed downstream of the automatic connection device 20 from the sheet roll 16 by driving rotate with drawing the film F, the encoder 24 is disposed on the said transmission Ri roller 22, said transmission Ri roller 22 The feed amount of the film F supplied to the packaging mechanism via the is detected.

As shown in FIG. 3, at the position close to the guide roller 18, the end detecting means 28 of the film F, which is disposed on the machine frame 11 via the bracket 26, faces, and the detecting piece 28a of the detecting means 28 is detected. Are set to face the circumferential groove 18a formed in the guide roller 18 with the film F interposed therebetween. That is, when the film F fed along the surface of the guide roller 18 is used up and is separated from the roller 18, the detection piece 28 a of the detection means 28 causes the detection piece 28 a to move.
It is adapted to detect the end portion of the film F by entering the a. As a means for detecting that the film F has been used up, for example, the set shaft 12
Photoelectric sensors composed of a light emitting / receiving element are arranged on both sides of the film F fed from the original roll 16 loaded in (14), and the end portion of the film F passes between the light emitting / receiving element. It may be performed by detecting that.

The automatic connection device 20 and each guide roller 18
A first holding mechanism 66 for applying a required tension to the film F is provided between the two. Since the upper and lower holding mechanisms 66, 66 have the same structure, the structure of the holding mechanism 66 located below will be described.

As shown in FIG. 3, a holding roller 68 parallel to the guide roller 18 is rotatably disposed between the guide roller 18 and the automatic connecting device 20. A pair of presser levers 72, 72 are rotatably provided on both sides of the guide roller 18 with the guide roller 18 interposed therebetween, and a presser plate 74 is provided between the levers 72, 72. , The pressing plate 74 has a holding roller 68 and a film F.
They are positioned so as to face each other with the pinch interposed (see FIG. 1).
A lever weight 72a is integrally provided on the presser lever 72, and the presser plate 74 is always in pressure contact with the holding roller 68 under the action of the weight 72a. That is, the film F that has been pulled out from the original roll 16 and passed through the guide roller 18 is supplied to the automatic connecting device 20 in a state where it is clamped by the pressing plate 74 and the holding roller 18 and a required tension is applied. Instead of rotatably configuring the pressing plate 74, the holding roller 68 may be pressed against the pressing plate 74 fixedly arranged by an appropriate means.

Further, the first holding mechanism 66, when the end portion of the film F is separated from the core of the original roll 16,
It also has a function of preventing the film F facing between the automatic connection device 20 and the guide roller 18 from being largely displaced from the feeding path. In particular the end portions of the film F from the master roll 16 to be loaded above the set shaft 12 is separated, the termination portion Re large vertical underlying on and the front side of the automatic connecting device 20 I <br/> Although there is a possibility that feeding failure may occur, since the film F is held by the first holding mechanism 66 at a substantially intermediate position between the automatic connection device 20 and the guide roller 18 as in this embodiment,
This can be effectively prevented.

Automatic packaging device 20 for the packaging film
As shown in FIGS. 1 and 2, the pair of fixing plates 30 and 30 are separated from each other by a predetermined distance in a direction intersecting the film feeding direction.
A pair of connecting mechanisms 32, 32 which are vertically opposed to each other with a film feeding path interposed therebetween are provided so that the old and new films are connected under the cooperative operation of both connecting mechanisms 32, 32. Since both connection mechanisms 32, 32 are symmetrical, only the configuration of the connection mechanism 32 arranged on the upper side will be described.
The same members of the lower connection mechanism 32 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 2, side plates 34, 34 parallel to the fixed plate 30 are disposed on the facing surfaces of the fixed plates 30, 30, and the side plates 34, 34 are arranged between the side plates 34, 34 in the film feeding direction. A pair of guide rollers 36 and 38 are rotatably supported by support shafts 37 and 39 so as to be separated from each other. Also, the upper connection mechanism 3
2, the support shaft 39 of the guide roller 38 on the downstream side is an eccentric shaft, and the handle 41 provided at the end of the support shaft 39 protruding from the fixing plate 30 is rotated to move the guide roller 38. The film is sandwiched by being pressed against the corresponding guide roller 38 in the lower connection mechanism 32. The side plates 34, 34 are rotatably held around a support shaft 39 of a guide roller 38 as a fulcrum.

The support shaft 37 of the guide roller 36 disposed on the upstream side of the side plate 34 in the film feeding direction is projected and supported on the outer surface facing the fixed plate 30, and
The end portion 37a is provided with a concave portion 37b which opens to the fixed plate side. Further, a knob 42 having a pin 42a protruding toward the inner surface thereof is disposed on the fixed plate 30 at a position corresponding to the recess 37b provided at the end of the support shaft 37, and the pin 42a is provided with the recess 42b. by resiliently engaged with 37b, which functions as a locking means for positioning the connecting mechanism 32, 32 is rotated a pre-Symbol shaft 39 as a fulcrum. Incidentally, instead of disposing the locking means composed of the pin and the concave portion on the side surface side of the connection mechanism 32,
It may be provided on the front surface side (upstream side in the film feeding direction), or it is also possible to employ a locking means related to another known mechanism.

As shown in FIG. 1, a pair of horizontal rods 44, 44 are installed on the upper ends of the side plates 34, 34 at predetermined intervals in the film feeding direction. A pair of guide rods 46, 46 are arranged at positions separated from each other. A slide body 48 is slidably arranged on each guide rod 46, and a support plate 50 is commonly fixed to the lower ends of both slide bodies 48, 48. Further , a compression spring 52 as an elastic means is elastically interposed between the slide body 48 and the horizontal rod 44 located on the downstream side of the guide rod 46, so that the slide body 48 and the support plate 50 are always fed by the film. It is configured to bias toward the upstream side in the direction. The compression spring 52 is provided in the suction chamber 56 (described later) when the connection of the old and new films described later is completed.
To return to a predetermined standby position.

As shown in FIG. 3, on the upper surface of the support plate 50,
As a pair of driving means spaced apart by a predetermined distance in the longitudinal direction
The air cylinders 54, 54 of the
To the piston rods 54a, 54a protruding downward from
A suction chamber 56, which is parallel to the support plate 50 and serves as a holder or suction means , is arranged in common. That is,
By urging the pair of air cylinders 54, 54 synchronously forward and reverse, the suction chamber 56 is connected to the other connecting mechanism 32.
Moves toward and away from the suction chamber 56. The suction chamber 56 is set to face a position separated from the feeding path of the film F when the piston rod 54a of the air cylinder 54 is retracted into the casing (see FIG. 1).

The drive means for moving the suction chamber 56 is not limited to the air cylinder 54, but may be a drive means such as a solenoid or a motor.

On the suction surface 56a of the other connection mechanism 32 of the suction chamber 56, which faces the suction chamber 56, a plurality of through holes 56b are formed at predetermined intervals in the longitudinal direction (see FIG. 2). . Further, the suction chamber 56, suction source 90 of the probe Roi such as a holding means
To the suction source 9 by means of a hose 58.
By forming a negative pressure in the chamber by the bias of 0 , the film F is suction-held on the suction surface 56a.

Here, the original roll 1 used in advance
Depending on the position of the set shaft in which 6 is loaded, a negative pressure is set in the suction chamber 56 of the connection mechanism 32 corresponding thereto. For example, when the film F of the original roll 16 loaded on the upper set shaft 12 is used in advance, a negative pressure is created in the suction chamber 56 of the lower connection mechanism 32, and conversely, the lower set. When the film F of the original roll 16 loaded on the shaft 14 is used in advance, a negative pressure is formed in the suction chamber 56 of the upper connection mechanism 32. The switching of the suction chamber 56 may be a manual switching method arbitrarily performed by an operator, or may be automatically timed to rotate one of the connection mechanisms 32 when a new film is set after the connection is completed. It is also possible to adopt an automatic switching system in which the switching is made to.

On the upstream side of both the connection mechanisms 32, 32,
As shown in FIG. 1, a second holding mechanism 76 for applying a required tension to the film F is provided, and the holding mechanism 76 is separated from the first holding mechanism 66 at the end portion of the film F. At this time, it functions to prevent the film F supplied to the connection mechanisms 32, 32 from loosening.

That is, a holding plate 78 parallel to the roller 36 is disposed at a position facing the guide rollers 36, 36 on the upstream side in the connecting mechanism 32, 32, and the upper and lower edges of the holding plate 78 are A pressing plate 80 that elastically contacts the peripheral surface of each roller 36 is provided. Note the pressing plate 80 extends over substantially the entire length of the draft in the furnace over la 36,
The film F is pressed against the peripheral surface of the guide roller 36. Therefore, even if the film F is used up and its end portion is separated from the first holding mechanism 66, the pressing plate 80 presses the film F against the guide roller 36, so that the film facing the connection portion of the old and new films is exposed. A predetermined tension is always applied to F.

The fixing plate 3 facing the downstream side of the connecting mechanism 32.
0, as shown in FIG. 1, when a printed film is used, a mark sensor 60 for detecting a registration mark attached to the widthwise end edge of the film is changed depending on the film width used. The position is adjustable. The mark sensor 60 functions when performing relative positioning of both films when the printed and old films are joined.

[0027]

[Operation of Embodiment] Next, regarding the action of the automatic connection system of the packaging film according to the present embodiment will be described with reference to the flowchart shown in FIG. The old film on the preceding use side is shown as "F ₁ " and the new film on the following use side is shown as "F ₂ ".

As shown in FIG. 4, the old film F ₁ fed from the old original roll 16 loaded on the lower set shaft 14 is used.
Is passed through the guide roller 18 and the first holding mechanism 66, further passes between the pair of connecting mechanisms 32, 32 in the automatic connecting device 20, and is continuously fed to the packaging mechanism side. .

In this state, first, the automatic connecting device 20
The connection mechanism 32 on the upper side is rotated clockwise around the support shaft 39 of the roller 38 on the downstream side as a fulcrum by releasing the locking means including the knob 42 and the recess 37b, and the suction surface 56a of the suction chamber 56. To the position where the new film F ₂ can be set. At this time, a negative pressure is formed in the suction chamber 56 by the bias of the suction source 90 . Then, the starting end of the new film F ₂ is pulled out from the new original roll 16 loaded on the upper set shaft 12 by a predetermined length, and the leading end of the new film F ₂ is moved in the width direction at a predetermined position of the printed film. After being cut at a right angle to, a single-sided adhesive tape (not shown) is attached to the end portion, and the tip portion is suction-held at a desired reference position on the suction surface 56a of the suction chamber 56. And the connection mechanism 3 with the new film F ₂ set
As shown in FIG. 5, 2 is rotated counterclockwise and positioned and fixed by the locking means. As a result, the old film F ₁ fed to the downstream side through the pair of guide rollers 36 and 38 in the lower connection mechanism 32 is sucked and held in the suction chamber 56 of the upper connection mechanism 32. The new film F ₂ is facing each other.

When the old film F ₁ is used up, the detection piece 28a of the end detection means 28 enters the circumferential groove 18a of the guide roller 18 to detect "end of film". Even after this detection, the old film F ₁ is in the automatic feeding state for a while, and the film portion is fed between the guide roller 18 and the connecting position of the connecting mechanism 32. In this process, the mark sensor 60 detects the registration mark at the predetermined position (predetermined number) preset from the end of the film, and the encoder 24 for detecting the feed amount of the film F ₁ counts the pulse count. Start. The encoder 24 uses the mark sensor 60.
When the preset number of pulses is detected from the time when the mark is detected, the air cylinders 54, 54 of the both connection mechanisms 32, 32 are energized.

After the "film end" by the end detecting means 28, the old film F ₁ is kept in the first holding mechanism 6
6 is separated from 6 to cause slack, but the second holding mechanism 7
Film F ₁ immediately before being supplied to the connection mechanism 32 by
Since it is configured to give the required tension to
The film F ₁ passing through the connecting mechanisms 32, 32 will not be loosened.

When the encoder 24 counts a predetermined number of pulses, the end portion of the old film F ₁ arrives at a predetermined portion above the suction chamber 56 in the lower connection mechanism 32, and the upper connection is made. The new film F that is set in standby in the suction chamber 56 of the mechanism 32
The registration marks (print patterns) facing each other at the start and end portions of the second position 2 and at the predetermined positions at the start and end portions of the _two are set to be in an aligned state as set.

When the air cylinders 54, 54 of the connecting mechanisms 32, 32 are energized based on the pulse count-up signal of the encoder 24, the suction chambers 56, 56 are brought close to each other as shown in FIG. Then, the start and end portions of both films F ₁ and F ₂ are clamped. At this time, the single-sided adhesive tape adhered to the start end of the new film F ₂ is adhered to the end of the old film F ₁ to connect the films F ₁ and F ₂ .

[0034] At this time, since the old film F ₁ is subsequently fed, together the film F ₁ both suction chambers 56 and 56 which sandwiches, as shown in FIG. 7, with the feed of the film F ₁ Move. Then, after a predetermined time (when the encoder 24 has further counted a predetermined pulse), the suction source 9 connected to the upper suction chamber 56.
The air cylinder 54,
54 is urged in the opposite direction so that both suction chambers 56, 56
Separate from each other to release the old and new films F ₁ and F ₂ . As a result, the new film F ₂ is constantly fed following the remaining end of the old film F ₁ . Further, since the suction chambers 56, 56 are separated from each other,
The slide body 48 is pushed back to the upstream side in the film feeding direction by the elastic force of the compression spring 52, and the suction chamber 5
6,56 return to the standby position.

When the new film F ₂ of the new original fabric roll 16 loaded on the lower set shaft 14 is connected to the old film F ₁ fed from the old original fabric roll 16 loaded on the upper set shaft 12 Except that the new film F ₂ is suction-held in the suction chamber 56 of the connection mechanism 32 on the lower side, and the subsequent operation is the same as the above-described example.

Here, in the above-mentioned embodiment, the case where the film on which printing (registration mark) is applied is connected has been described, but the connection is similarly performed even on the film on which printing is not applied. However, in the case of unprinted film,
Since the printed pattern matching control (registration mark control) is not required, as shown in the flowchart of FIG. 8, the old film F ₁
Is exhausted and the end detecting means 28 detects "end of film", the encoder 24 immediately starts pulse counting. Then, after that, the same operation as that of the printing film described above is performed to connect the old and new films F ₁ and F ₂ .

(Regarding Modifications) FIG. 10 shows another example of the returning means of the suction chamber 56 in the connection mechanism 32, in which vertical shafts 82 are erected on the upper surfaces of both ends in the longitudinal direction of the support plate 50. A spool 84 is rotatably supported on the shaft 82. A spiral spring 86 is wound around the spool 84, and the end of the spiral spring 86 facing the outer periphery is fixed to the horizontal rod 44 located on the upstream side. Also,
The other end facing the inner circumference of the spiral spring 86 is fixed to the spool 84.

That is, when connecting the old and new films F ₁ and F ₂ , the suction chamber 5 is driven by the feeding force of the old film F _1.
When 6 moves from the standby position to the downstream side, the spiral spring 86 is pulled out from the spool 84 and extends (shown by a chain double-dashed line in FIG. 10). Next, when the suction chamber 56 is separated from the films F ₁ and F ₂ , the spiral spring 86 is returned to the standby position by the action of rewinding the spiral spring 86 on the spool 84.

In the embodiment, the case where the suction chamber is used as a means for holding the starting end of the new film on the trailing side has been described, but the present invention is not limited to this, and an appropriate locking means may be used. You may make it hold | maintain. Although the above explained case of connecting the old and new film using a single-sided adhesive tape, or be connected using a double-sided adhesive tape instead of this, for example, as shown in FIG. 9, the impulse Sea La on one of the suction chamber 56 provided with a 6 2, arranged a cradle 64 made of heat such as rubber other suction chamber 56, both suction chambers 56 and 56
Therefore, when the old and new films F ₁ and F ₂ are sandwiched, heat sealing may be performed by the impulse sealer 62.

[0040]

As has been described in the foregoing, according to the automatic contact ZokuSo location of the packaging film according to the present invention, the old and new film proximate a pair of holding members disposed facing each other across the film feed path to each other Since the holder is moved by the feeding force of the old film as well as being sandwiched, the new and old films can be automatically connected without absorbing the shock during the connection operation and stopping the film feeding. The operating efficiency of the film-using device can be improved. Also, since the holder is moved by the old film, it is possible to cope with the high-speed feeding of the film without stopping the pulling out of the original roll, and moreover, stable automatic film connection without printing position deviation is achieved. You can Furthermore,
Arranged on the upstream side of the film feed direction from the connection mechanism
With the holding mechanism, the old film is tensioned.
Since it is configured to hold in the state of gaining,
Even if the end of the old film is separated,
It is possible to prevent and ensure the film by the connection mechanism.
You can make a good connection.

Further, since it is not necessary to control the film feeding speed and to store the film in advance by providing a dancer roller or the like, the apparatus can be simplified and the space can be saved. Further, a device for changing the set position of the old original roll and the new original roll, which have been spliced, is provided by providing a holding means for the new film on the holding bodies on both sides facing each other across the film feeding path. There is no need to provide it, and the advantageous effect that the manufacturing cost can be kept low is achieved.

Further , the film end detecting means and the mark sensor
The drive and suction means are controlled by the controller and encoder.
Old file with a cash register mark
The end of the film and the start of the new film are aligned as set.
It is possible to connect accurately in the state.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a state in which an automatic connecting device for a packaging film according to an embodiment is incorporated in a film feeding device.

FIG. 2 is a schematic perspective view of an automatic connecting device for a packaging film.

FIG. 3 is a front view showing the automatic connection device for the packaging film with a part thereof cut away.

FIG. 4 is an explanatory view showing a state before connecting the old and new films by the automatic connecting device for the packaging film.

FIG. 5 is an explanatory diagram showing a state in which the upper connection mechanism is rotated and positioned with respect to the lower connection mechanism.

FIG. 6 is an explanatory view showing a state where the air cylinders in the upper and lower connection mechanisms are urged to clamp the start and end portions of the old and new films.

FIG. 7 is an explanatory view showing a state in which the suction chamber in the connection mechanism moves integrally with the film feeding.

FIG. 8 is a flowchart of an automatic connecting device for packaging films.

FIG. 9 is an explanatory view showing another example of a film sealing mechanism adopted in an automatic connecting device for a packaging film.

FIG. 10 is an explanatory view showing another example of the returning means of the suction chamber adopted in the automatic connecting device for the packaging film.

[Explanation of symbols]

 16 Raw roll22 Feed roller 24 encoder 28 End detection means 32 connection mechanism 34 Side plate 36 Guide roller 38 Guide roller 46 Guide rod 48 slides  52 Compression spring(Elastic means) 54 Air cylinder(Driving means) 56 Suction chamber(Holder, adsorption means) 56a suction surface 60 mark sensor 66 First holding mechanism 90 Suction source (holding means) F film F ₁ Old film F ₂ New film

Claims (2)

(57) [Claims] 1. An old film (F ₁ ) provided with a pair of original rolls (16) wound with a packaging film (F), which is fed from one of the original rolls (16) and used. When used up, in the automatic connecting device of the packaging film for connecting the starting end of the new film (F ₂ ) drawn from the other original roll (16) to the film end, the film (F) A pair of contacts facing each other across the feeding path
Equipped with connection mechanism (32, 32), one connection mechanism (32) is rotatable
It is supported by the close-spaced, with respect to the other connecting mechanism (32)
The connection mechanism (32) is configured to be movable, and is separated in the width direction intersecting the feeding direction of the film (F).
The pair of side plates (34, 34) and the side plates (34, 34) are rotatably installed between the side plates (34, 34).
The film (F) is proposed by locating in parallel in the feeding direction.
Inside the pair of guide rollers (36, 38) and the film width between the pair of guide rollers (36, 38)
Are arranged parallel to the side plates (34, 34) and are separated in the direction
A pair of guide rods (46, 46) extending in the feed direction and a pair of guide rods (46, 46) slidably disposed on the pair of guide rods (46, 46).
Slide body that can move in the film feeding direction (48,48)
And the slide body (48, 48) is arranged to move integrally.
And the driving hand installed on this slide body (48, 48)
Toward and away towards the other connecting mechanism (32) by the step (54, 54)
The movable holder (56) and the holder (56) in the direction opposite to the film feeding direction.
The elastic member (52, 52) for urging and the starting end of the new film (F ₂ ) provided on the holding body (56)
Part on the surface (56a) facing the other holding body (56).
It consists of a holding means (90) that can be held, and from each of the original rolls (16) to the corresponding connection mechanism (32).
Required for the film (F) in the film feeding route
Hold the film (F) with the tension applied .
An automatic connecting device for a packaging film, which is characterized in that each holding mechanism (66) is provided . (2)Regimer at predetermined intervals in the film feeding direction
Marked withWrapping film(F)Rolled roll
(16)One pair of rolls(16)From the
Old film used(F ₁ )Is exhausted
On the other end of the film,(16)Subtract from
New film released(F ₂ )Packaging fill that connects the beginnings of
Automatic connection device(F)Placed opposite to each other across the feeding path
Is movable in the film feeding direction, andThe new fill
Mu (F ₂ The surface (56a) that directs the start end of the
A pair of suction means that can be held by suction (56,56)When,Close each of the suction means (56) toward the other suction means (56).
Contact ・ Drive means (54) for moving away from each other,  SaidEach adsorption means (56)Aim in the direction opposite to the film feeding direction
Elastic member(52)When,From each roll roll (16) to the corresponding suction means (56)
Between the film (F)
Film end detection means (28,28) that detects the passage of the end part
When, The film feeding direction from the position where the suction means (56, 56) is arranged.
Regima attached to the film (F) arranged on the downstream side
Mark sensor (60) to detect the A feed roll that pulls out the film (F) from the original roll (16).
Is installed on the filter (22) and detects the amount of film (F) fed.
With an encoder (24), The film end detection means (28) is the old film (F ₁ ) End
After detecting the passage of a part, the mark sensor (60)
Registration mark at a preset position from the end of the film
Is detected by the encoder (24).
This encoder set to start counting (24)
Is detected by counting the preset number of pulses.
As a matter of fact, the driving means (54, 54) is urged so that both suction hands are
The steps (56, 56) are close to each other and both films (F ₁ , F ₂ ) Beginning and end
A new film (F ₂ ) And the old film (F ₁ )
Connect to the end of The old film (F ₁ ), The film (F ₁ , F ₂ )
Both clamping means (56 , 56) are moving together
In this state, the encoder (24) further counts a predetermined pulse.
The new film (F ₂ )
Release the suction hold and reverse the driving means (54, 54).
By urging the two suction means (56, 56) apart from each other.
Old film (F ₁ , F ₂ ), The adsorption means (56,5
6) is the film feeding under the elastic action of the elastic member (52, 52).
Configured to be pushed back to the upstream side in the direction Characterized by
Automatic connection device for packaging film.