JPH03251443A - Device for imparting inclination to be folded of tongue for film bag manufacturing machine - Google Patents

Abstract

PURPOSE:To fold a tongue over a section to be overlapped securely by heat melting elastic folding sections of a continuous film with folded tongues at an induction roll section to form inclination to folding and further pressing the same by means of press rolls. CONSTITUTION:A folding inclination imparting device 14 consists of a guide roll 141, an induction roll 142 for bending a film installed above the guide roll, press rolls 143, a shaft of which is brought into contact with the upper section of the induction roll 142 through a spring 143', and a guide belt 145 having the width almost same as the width of a film piece B and overlapping the surface of the film piece B between a heating block 144 moving close to the front section of the induction roll 142 and the guide roll 141. The heating block 144 is formed rocking freely with an axis 148 as its center and moves a working piece 147 close so that the heating block 144 holds a very small space between itself and the induction roll 142 at the time of transferring the film piece B intermittently, while moving the heating block 144 away from the induction roll 142 at the time of stopping the film piece B intermittently.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a tongue folding device for ensuring the folding of the tongue in a machine for manufacturing film bags such as envelopes in which the tongue is folded.

[Conventional technology]

Continuously manufacturing 11 fill bags having tongues from a long film is known from JP-A-4.8-6872 and JP-A-48-12267.

[Problem to be solved by the invention]

The reality is that all of the above-mentioned conventional methods merely produce film bags with the tongues left open. However, recently, films with excellent water resistance, transparency, strength, etc. have been used as envelopes, and attempts have been made to continuously produce film bags with folded tongues. However, due to the elasticity of the film, the tongues cannot be bent reliably, and if the tongues are not bent reliably, the bags become bulky when bundled, making it inconvenient to package and transport. In view of these current circumstances, the present invention has been devised so that folded tongue pieces in a film bag manufacturing machine such as envelopes with folded tongue pieces can be reliably made with folds to continuously and efficiently manufacture film bags that are easy to seal. It is an object of the present invention to provide a folding device that has the following features.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides five guide rolls at the front, center, and back for guiding a long film piece that is intermittently transferred and has bent tongues, and above the middle guide roll, the long film piece is A guide roll is provided to bend and transfer the piece in a meandering manner, a pressure roll is brought into pressure contact with a single part of the guide roll, and a heating block is provided at the front of the guide roll so that it can be approached freely, and a front guide roll and a middle guide are provided. A pressure belt is provided between the rolls to contact the surface of the bent tongue of the long film. The heating block is configured to be as close as possible to the film piece during intermittent transport without damaging it, and to be separated from the guide roll during intermittent stoppage of the film piece. Further, the pressure contact belt is formed to have a substantially concave shape with rIJ of the film piece, contacts the surface of the bent portion of the tongue, and rotates by the action of transporting the film piece.

[Effect]

The long film 11 piece with the tongue piece bent is bent from the iM+ part guide roll to the middle guide roll part by the pressure contact bell 1- which comes into contact with the surface of the folded part of the tongue piece to the folded part side. After preventing the occurrence of misalignment at the bent part of the tongue piece when the tongue piece is folded, the film piece is transferred to a guide roll, and the bent part is heated and melted with a heating block to form a crease. A part of the pressure roll (guiding roll) is used to immediately press and shape the tongue piece to ensure that the tongue piece is bent and folded, and the film piece with the tongue piece bent and folded in this way is separated at a predetermined interval by a known cup-sealing device. This method produces a film bag that is cut in 11 directions at σ and sealed at the same time, with the tongue folded.

【Example】

The details of the embodiment of the present invention will be described with reference to the drawings. A long film lsA that is continuously transferred from a reel 2 by a driving roller 1 is folded by a folding device 3 consisting of a folding plate 31 and a folding bar 32 on both sides 8a-a. It is folded to form folded overlapping parts bb on both sides and a narrow single part C in the center. The fill ISA that is continuously transferred in this way is suspended from the dancer roller mechanism 4 pulled by the lower rollers 41 by the springs 42, and is guided between the intermittent drive rollers 5. The film A is then converted from continuous transport to intermittent transport. At the starting end of this intermittent transfer section, the central part of the film lzA is cut and a pair of left and right film pieces B-B are cut.
A separating device 6 is installed to separate the left and right sides. The separating device 6 includes a pair of parallel L lower guides 61, 62, 61, and 62 arranged in a square shape at approximately 90 degrees in the direction of travel of the film A, as shown in FIGS. 2 to 4. A cutter 64 is provided at the apex of the V-shape via an attachment piece 63, and the cutter 64 cuts the central portion of the single layer C of the film A to form a tongue piece d at the overlapped portion. The pair of film pieces B-B are formed into a pair of film pieces B-B, and each of the pair of film pieces B-B is guided from a part 51 of the upper guide 61 to the lower side of the lower guide 62, so that the film pieces B-B are left and right at a predetermined interval. It is configured to be separated so as to hold it. Therefore, the lower guide 62 shown in 11u is located slightly behind the upper guide 61 when viewed from the plane, and a pair of ■-shaped upper and lower guides 6]-62, 61, and 62 are mounting bases at the apex of the upper guide 61. 65, 65 are formed to be rotatable around the mounting shaft 66, and the outer mounting bases 67, 67 are formed on the machine base 68.
The upper and lower guides 61, 62, 61, and 6 are adjustably fixed to each other through the fixing screw 69 and the arcuate elongated hole 69'.
The angle of the V-shape 2 can be finely adjusted, and when increasing the distance between the film pieces B-B, the upper and lower guides 6
This is to adjust the V-shaped angle of 1, 62, 61, and 62 to become larger. Film pieces B separated left and right at a predetermined interval in this way
-B has its tongue piece d cut into a V shape by a V-shaped cutting device 7 at predetermined intervals, and then a folding line e is heated and engraved at the base of the tongue piece d between the V-shaped cuts by a folding line heating forming device 8. After that, the tongue piece d is overlapped and bent from the folding line e to the overlapped portion by the folding device α9. Therefore, the V-shaped cutting device 7 and the folding line heating forming device 8
The folding device 9 is attached to a pair of left and right movable frames 11''1. The movable frame 1] is interlocked with each other so that even if meandering occurs in the transport action of the film pieces B and B, the V-shaped cut 1-1 folding line can be formed and bent at the correct predetermined position. As shown in FIGS. 5 and 6, the movable frames 11, 11 are guide rods 121 installed at the front and rear of the machine frame 2.
When the rotation axis of the forward/reverse motor 122 installed in the machine frame 2 is supported so as to be movable from side to side, The forward/reverse motor 122 is attached to the mounting piece 1 on the moving frame 1].
The sensor 10 detects the position of the outer edge of the film piece B and drives the forward/reverse motor 122 according to the position to automatically adjust the position of the moving frames 11. It is configured so that it can be moved left and right. Further, as shown in FIGS. 7 and 8, the V-shaped cutting device 7 has a cylinder 7 fixed to a movable frame 11, respectively.
V-shaped cutting blade 72 and movable fly 1111 that move downward one step at a time
When the film pieces B and B are stopped intermittently, the cylinder 7
1 is activated to cut the tongue pieces d of the film piece B into a substantially V shape at predetermined intervals. Next, as shown in FIGS. 9 to 11, the folding wire heating forming device 8 is constructed such that a support plate 82 made of silicone rubber is installed at the lower part between the support frames 81 and 81 supported by the respective movable frames 11, and is attached. Rotating shaft 84 supported by frames 83, 83
A heating block 86 is provided at the tips of swing arms 85, 85 fixed to both ends of the rotating shaft 84, and an air cylinder 88 is attached to the tip of an operating rod 87 fixed to the center of the rotating shaft 84. Then, the air cylinder 88 moves to the film piece 1' (-B
By operating during intermittent stoppage, the rotating shaft 84 is rotated via the operating rod 87, the swinging arms 85 are rotated downward, and the edge of the heating block 86 is attached to the film piece on the receiving plate 82-. After pressing the film against the base -1- of the tongue piece d of B-B and heating and melting it to form the fold line e, the air cylinder 8
8 is configured to reverse the rotating shaft 84 and raise the heating block 86 from the film pieces B and B. Further, the bending device 9 includes a support frame 119 fixed to the movable frame 11 as shown in FIGS. 12 and 13.
- Support plates 1 to 93 having notch grooves 92, 92... are fixed to the lower part between 91, and the support plates 1 to 9
A rotary rod 95 that is reciprocated by a rotary actuator 94 is provided at the lower part of the rotary actuator 94 , and folding bars 96 of the tongue pieces d are fixed at the positions of the notch grooves 92 on the rotary rod 95 . A pressure plate 98 that moves up and down with a cylinder 97 is installed above the press plate 98 . Therefore, the film piece B is formed by heating the fold line d.
is transferred onto the support plate 93 and stopped intermittently, the rotary actuator 94 is activated to rotate the rotary rod 95, and the folding bar 96 bends the tongue piece d from the fold line e onto the overlapping part. In this state, the air cylinder 97 is operated, and the pressing plate 98 is lowered to bend and press the bent tongue d to the overlapped portion b-h. The film piece B-B, which has been bent from the folding line e to the overlapping part of the tongue piece d, is guided below the folding part return prevention plate 13, and is then intermittently transferred and curled by the device 14. The bent portion of the tongue piece d is heated and pressurized to ensure the crease. The folding device 14 has a front part as shown in FIG.
Guide rolls 141 and 14 arranged sequentially in the middle and rear parts
1.141, a guide roll 142 provided above the middle guide roll 141 for bending the film, a pressure roll whose shaft portion is pressed against the upper part of the guide roll 142 via a spring 143', and a guide roll 43. A heating flock 144 provided in the front part of the roll 142 so that it can be freely approached, a film piece B superimposed on the surface of the film piece B between the front guide roll 41 and the middle guide roll 141, and a guide bell I- in the path 11. 1-45, and furthermore, the heating block 144 swings about a shaft 148 via a mounting piece 146, an actuating plate 147 having a spacing adjustment plate 147' and a buffer spring 147''. The actuating piece 47 is actuated by an air cylinder 149, and the heating roller 14 is operated during intermittent transfer of the film piece B.
4 is brought close to the guide roll 142 so as to maintain a minute gap, and the heating block 1-44 is separated from the guide roll 1-42 when the fill 11 piece B is stopped intermittently. Therefore, the film piece B, which is intermittently transferred from the folding part return prevention plate] 3 to the front guide roll 141 of the folding device 14, is folded and the tongue piece d, which is overlapped, is transferred from the middle roll] 41 to the guide roll 142. Even if the tongue piece d is bent, the bent tongue piece 6 is guided while being pressed in advance with a guide bell 1-1'J5 so that the bending part of the tongue piece d does not shift, and is transferred to the guide roll 42.
The portion of the fold line C of the tongue piece d bent by the heating block 1-44 is slightly heated and melted to form a crease, and then pressed by the press roll 143 to securely maintain its shape. The film piece B with the tongue piece d folded in this way is intermittently transferred to a well-known seal cutting device 5, which consists of a sealing roller 51 and a sealing cutter 152 installed at the rear of the intermittent drive rollers 5. v when stopped
Bags C, such as envelopes, are continuously manufactured by welding the die-cut portion in the [11] direction and at the same time folding the tongue piece d into the cup 1. Effects of the Invention The present invention heat-melts the elastic bent portion of 11 pieces of long film having bent tongue pieces at the guiding roll portion using a heating block to form folds, and immediately after that, Further, by pressing with a pressure roll, the folded portion can be reliably shaped and fixed, and the tongue piece can be reliably folded into the polymerized film portion. In addition, the present invention is particularly designed to prevent the bent portion of the tongue piece from shifting when the film piece 11 is bent toward the surface side in order to transfer the film piece from the middle guide roll 1 2 to the guide roll by contacting the film piece surface. The jFL of the pre-bent tongue piece is guided to the guide roll while being prevented by the guide bell 1-
Envelopes, etc. that can be easily sealed and bundled, in which the bent portion of the tongue can be reliably folded with a heating block, and the tongue can be reliably folded by heating the bent portion of the tongue. film bags can be manufactured continuously and efficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main parts of the present invention, FIG. 2 is a plan view of the separation device, FIG. 3 is a side view of the same, and FIG. 4 is the same as shown in FIG.
5 is a plan view of the moving guide portion, FIG. 6 is a front view of the same, FIG. 7 is a front view of the V-shaped cup 1 to the device, FIG. 8 is a plan view of the same, and FIG. 9 is a folded view. A plan view of the wire heating forming apparatus, No. 10Ii1 is a front view of the same part, and FIG.
- An X-ray sectional view, FIG. 12 is a front view of a part of the bending device, FIG. 13 is a partially cutaway plan view of the same, and FIG. 14 is a side view of the device. 5 ・Intermittent drive roller, 6 ・Separation device, 7...V
Mold cutting device, 8... Fold line heating forming device, 9... Folding device, ] 4... Straightening device, 141... Guide roll, 142... Guide roll, 143... Press roll,]
44... Heating block, 145... Guide belt, 15
・・Seal cutter 1~device, C・Long film 11, B・
・11 pieces of fill, C: bag, d: tongue piece, C: folding line.

Claims (1)

[Claims] 1. Three guide rolls, front, center, and rear, are provided to guide the long film piece that is intermittently transferred and has a bent tongue, and the long film piece is bent and transferred in a meandering manner above the middle guide roll. A guide roll is provided at the top of the guide roll, a pressure roll is brought into pressure contact with the upper part of the guide roll, and a heating block is provided at the front of the guide roll so that it can be approached freely, and the tongue of the long film is folded between the front guide roll and the middle guide roll. A tongue folding device for a film manufacturing machine, characterized in that a pressure belt is provided along the surface of the curved portion.