JPH03251445A - Tongue folding device for film bag manufacturing machine - Google Patents

Abstract

PURPOSE:To carry out fine adjustment of movement of a movable guide in the width direction and fold a tongue precisely by sensing zigzag movement of a film piece with a sensor during the intermittent transfer of a continuous film piece with overlapped tongue. CONSTITUTION:Tongues (d) of film pieces B. B separated into the left and right at given interval are cut into the V-shape by a V-shape cutting device 71, and then folding lines (e) is heat formed on a base section of the tongue (d) between V-shaped cuts by a folding line heat forming device 8. Then, the tongue (d) is overlappingly folded from the folding line (e) onto a section (b) to be overlapped by the folding device 9. The V-shape cutting device 7, the folding line heat forming device 8 and the folding device 9 are mounted on a couple of movable frames 11, 11 with sensors 10, left and right, and the outer edge of film pieces B are sensed by respective sensors 10, and the movable frames 11 are linked correspondingly to said positions respectively so that the formation of V-shaped cuts and folding lines and folding the same can be carried out on the given correct positions even if zigzags are generated in the transfer of film pieces B.B.

Description

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

The present invention relates to a device for bending and folding tongues in a film bag manufacturing machine that continuously manufactures film bags such as envelopes with folded tongues from a long film.

[Conventional technology]

Continuously manufacturing film bags having tongues from a long film is disclosed in Japanese Patent Application Laid-open No. 4.8-6872 and Japanese Patent Application Laid-open No. 4.
It is known from Publication No. 8-12267 and the like.

[Problem to be solved by the invention]

The reality is that all of the above-mentioned conventional methods simply 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 it is also difficult to accurately determine the bending position of the tongues of the film that is being transported intermittently and to continuously bend them. It is an object of the present invention to solve these problems in film manufacturing machines and to provide a tongue folding device that can reliably and efficiently fold the tongues of a film bag. .

[Means to solve the W problem]

In order to achieve the above object, the present invention provides an intermittent transfer device for film pieces having a tongue piece on one side of the folded overlapping part, and a sensor for detecting the position of the side edge of the film piece, and a sensor provided at the rear of the sensor. In conjunction with this, a moving guide is provided which is movable in the width direction of the film and extends in the transport direction, and each of the moving guides is provided with a V-shape in which the tongue piece, which is activated when stopping intermittently, is cut into a rectangular shape at predetermined intervals. A cutting device, a folding line heating forming device for heating and engraving a folding line on the base of the tongue, and a folding device for bending and overlapping the tongue along the folding line are installed in sequence. The sensor is provided to detect the position of either the side edge of the tongue side of the film piece or the side edge of the overlapping fold side, and in order to improve manufacturing efficiency, the device of the present invention is installed symmetrically. It is preferable in terms of efficiency to manufacture film bags simultaneously by dividing a single long film in parallel.

[Effect]

A sensor detects the position of the side edge of a long film piece that is folded and overlapped and has a tongue portion on one side and is transferred intermittently by an intermittent transfer device, and the moving guide is adjusted and moved in the width direction according to the position. When the film piece is stopped intermittently, the tongue piece is cut into a rectangular shape at predetermined intervals using a V-shaped cutting device, and then a folding line is heated and engraved on the base of the tongue piece using a folding line heating forming device. The tongue piece is folded by folding the tongue piece from the folding line that has been heated and engraved, and the long film piece with the tongue piece folded in this way is then folded with a folded part on the subsequent page as necessary. The process of making a film bag involves heating it with a device to create a crease, then cutting the V-shaped cut portion in the width direction using a known cut-seal device and sealing it at the same time to fold the tongue piece to produce a film bag. be.

【Example】

To explain the details of the embodiment of the present invention with reference to the drawings, a long film A is continuously transported from a reel 2 by a driving roller 1-1 to a folding device 3 consisting of a folding plate 31 and a folding bar 32. Both side edges a'a are folded in,
The lower rollers 41, 41, . The film A is suspended from a dancer-roller mechanism 4 pulled by a roller and guided between intermittent drive rollers 5, thereby converting the continuous transport action to the intermittent transport action. A separating device 6 is installed at the starting end of this intermittent transfer section for cutting the center portion of the film A and separating the pair of cut left and right film pieces B-B from side to side. The separating device 6 includes a pair of parallel upper and lower guides 61, 62, 61, and 62 arranged in a V-shape at approximately 90 degrees in the traveling direction 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. A pair of film pieces B-B are formed, and each of the pair of film pieces B-B is guided from the upper part of the upper guide 61 to the lower side of the lower guide 62 to maintain a predetermined interval between the film pieces B-B in the left and right directions. The structure is such that it can be separated as follows. However, the lower guide 62 is located slightly rearward than the upper guide 61 when viewed from a plane position, and also has a pair of
The upper and lower guides 61, 62, 61, 62 have mounting bases 65, 65 at their apexes that are rotatable around their mounting shafts 66, and outer mounting bases 67, 67 are fixed to the machine base 68 by screws 69. The V of the upper and lower guides 61, 62, 61, and 62 is adjustable by fixing them via the circular arc-shaped elongated holes 69'.
The angle of the film can be finely adjusted, and when increasing the distance between the film pieces B-B, use the upper and lower guides 61 and 6.
2. Adjust the angles of the squares 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 at predetermined intervals by a riveting machine 6 and a cutting device 7, and then a folding line e is formed at the base of the tongue piece d between the v-shaped cuts by a folding line heating forming device 8. After being heated and engraved, the tongue piece d is cut by the bending device 9.
is superimposed and folded from the folding line e to the overlapped part S. Therefore, the V-shaped cutting device N7 and the folding line heating forming device 8
The folding device 9 is attached to a pair of left and right moving frames 11, 11 each having a sensor 10. The sensor 10 detects the outer edge position of the film piece B, and the folding device 9 moves the moving frame 11 according to the detected position. are interlocked with each other so that even if meandering occurs in the transporting action of each film piece B, film pieces B and B can be cut at the correct predetermined position, the folding line can be formed, and the folding can be performed. The movable frames 11, 11 are provided with guide rods 121, 12 installed at the front and rear of the machine frame 12, as shown in FIGS. 5 and 6.
1, and are respectively screwed to a rotation shaft 123 of a forward/reverse rotation motor 122 installed in the machine frame 12, and a rear rotation shaft 125 rotated from the rotation shaft 123 via a timing belt 124. The forward/reverse motor 122 is operated in conjunction with the sensor 10 attached to the movable frame 11 with a mounting piece 126, and the sensor 10 detects the position of the outer edge of the film piece B and operates according to the position. The forward/reverse rotation motor 122 is driven to automatically adjust the positions of the movable frames 11 to the 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.
It consists of a V-shaped cutting force 72 that moves up and down at 1, and a film support frame 73 supported by a moving frame 11, and when the film pieces B and B are stopped intermittently, the cylinder 71 operates to cut the tongue piece of film piece B. d is cut 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 tip of the swinging arms 85, 85 fixed to both ends of the
Further, an air cylinder 88 is attached to the tip of an operating rod 87 fixed to the center of the rotating shaft 84, and the air cylinder 88 operates when the film piece B-B is stopped intermittently, thereby controlling the operating rod 87. The heating block 8
6 is pressed against the base of the tongue piece d of the film piece B-B on the receiving plate 82 and the film is heated and melted to form the fold line e, and then the air cylinder 88 reverses the rotation axis 84. The heating block 86 is raised from the film pieces B and B. Further, the bending device 9 includes support frames 91 and 91 fixed to the movable frame 11, as shown in FIGS. 12 and 13.
A support plate 93 having cutout grooves 92, 92, . Folding bars 96 of tongue pieces d are fixed at the positions of the notch grooves 92 in the rod 95, and a suppressing plate 98 that is moved up and down by a cylinder 97 is installed above the support plate 93. 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 actuated, the rotating rod 95 is rotated, and the folding bar 96 bends the tongue piece d from the folding line e onto the overlapping part. In this state, the air cylinder 97 is actuated to lower the suppressing plate 98 to bend and press the bent tongue d onto the overlapping portion. 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 42 for bending the film provided above the middle guide roll 141, a pressure roll 143 whose shaft portion is pressed against the upper part of the guide roll 142 via a spring 143', The heating block] 44, which is provided so as to be able to approach the front part of the roll] 42, the film piece B superimposed on the surface of the film piece B between the front guide roll 141 and the middle guide roll 141, and the guide of the substantially concave [1] The heating block 144 further includes an actuating plate 1 having a mounting piece 146, a spacing adjustment stopper 147', and a buffer spring 147''.
The actuating piece 47 is actuated by an air cylinder 149 to maintain a minute gap between the heating block 1.44 and the guide roll 142 during intermittent transfer of the film piece B. The heating block 144 is brought close to the guide roll 142 so that the film piece B is stopped intermittently, and the heating block 144 is separated from the guide roll 142 when the film piece B is stopped intermittently. Therefore, the film piece B, which is intermittently transferred from the bending 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 bent from the middle roll 141 to the guide roll 142. In order to prevent the bent part of the tongue piece d from shifting even if the tongue piece d is bent, the guide belt 145 presses and guides the 8 parts of the bent tongue piece d in advance and transfers it to the guide roll 142. The fold line 0 portion of d is slightly heated and melted to form a crease, and then pressed with a pressing roll 143 to further securely maintain its shape. The fill 11 piece B with the tongue piece d folded in this way is intermittently transferred to a known seal cutting device 5 consisting of a sealing roller 151 and a sealing cutter 152 installed at the rear of the intermittent drive rollers 5. At the time of stopping, the bag C, such as an envelope, is continuously manufactured by welding the cut portion in the 111 direction and cutting it at the same time and folding the tongue piece d.

【Effect of the invention】

In the present invention, a sensor detects the meandering wobbling of a polymerized long film piece having tongues during intermittent transfer, and the moving guide is finely adjusted in the width direction accordingly and attached to the moving guide. The V-shaped cutting device, the folding line heating forming 11 2 device, and the folding device for processing the tongue can be moved to the correct position of the tongue, and the folding can be performed accurately. Further, in the present invention, the V-shaped cutting device sequentially attached to the moving guide forms diagonal cut corners at both ends of the tongue, and then the folding line heating forming device heats and engraves the folding line at the base of the tongue. To continuously and efficiently manufacture a film bag such as an easy-to-seal envelope, which is made by folding a tongue piece with obliquely cut corners at both ends, by ensuring and facilitating the bending action of the tongue piece from a folding line by a bending device. It has an excellent feature that it is possible to compactly integrate each device for processing the tongue pieces as a unit on a moving guide, and to reduce the size and simplify the structure of the film bag manufacturing machine.

[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, Fig. 4 is a sectional view taken along the line X-X of Fig. 1, and Fig. 5 is a movement. A plan view of the guide portion, FIG. 6 is a front view of the same, FIG. 7 is a front view of the V-shaped cutting device, FIG. 8 is a plan view of the same, FIG. 9 is a plan view of the folding line heating forming device, and FIG. 10 is a front view of the same part, FIG. 11 is a sectional view taken along the line X-X in FIG. 10,
FIG. 12 is a front view of a part of the bending device, FIG. 13 is a cutaway plan view of the same part, and FIG. 14 is a side view of the device. 5... Intermittent drive roller, 6... Separation device, 7...
V-shaped cutting device, 8... Folding line heating forming device, 9...
- Folding device, 1.0... Sensor 11... Moving frame, 14... Folding device. 15... Seal cutting device, A... Long film,
B... Film piece, C... Bag, d... Tongue piece, e.
・Folding line.

Claims (1)

[Claims] 1. An intermittent transfer device for film pieces having a tongue piece on one side of the folding and overlapping part includes a sensor for detecting the side edge position of the film piece, and a sensor provided at the rear of the sensor and interlocking with the sensor to detect the width of the film. A movable guide is provided which is movable in the transport direction and extends in the transport direction, and each of the movable guides is provided with a ripple-shaped cutting device for cutting the tongue into a ripple shape at predetermined intervals, which operates when stopping intermittently, and a ripple-shaped cutting device at the base of the tongue. A tongue folding device for a film bag manufacturing machine, characterized in that a folding line heating forming device for heating and engraving a folding line and a folding device for folding and overlapping a tongue from the folding line are sequentially installed.