JPH0948078A - Bag making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To curb cost by shortening scraps at the time of bag-making work. SOLUTION: In a bag-making machine to form bags which is equipped with feed rolls 18, 18a which deliver a tubular film 3, a heater 65 which heat-seals, and a cutter 43 which cuts off a head portion, and forms a bag having a sealed portion on one side and an opening on the other side, the feed rolls 18, 18a are reversible at the time of heat sealing or just after that, and consist of a heater portion 66 and a heater table 68. In the meantime, seats 86, 86a are provided in a movable manner to prevent the film 3 from sticking to a heater body 67 and a heater table 68 at the time of heating, a cutter 43 is made up of an upper cutter 44 and a lower cutter 46, and a pressing lever 57 which releases and presses scraps 55 from the cutter 46, and discharges in combination with the lower cutter 46 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-making apparatus for forming a bag body in which one end of a tubular plastic film is closed and the other end is opened.

[0002]

2. Description of the Related Art For example, bottles and containers are generally packaged in a bag made of a heat-shrinkable plastic film. As shown in FIG. 26, the manufacturing method of the bag body 89 is such that first, a flat tubular film is welded by a heat-sealing blade which is curved in a convex shape, and a scrap portion 90 is provided on one side and an opening is provided on the other side. Several tubular bodies having a portion 91 are manufactured. Then, the scrap portion 90 was torn and removed along the curved seal edge 93 by the operator.

[0003]

However, it is difficult for the above-mentioned conventional means to reliably break the scrap portion 90 along the seal edge 93 by the worker, and as a result, cracks occur on the product side.
There was the inconvenience that 95 occurred and an extra portion remained, so this work required skill. In addition, the workability is poor because it relies on manual work in this way.

Moreover, a long scrap portion 90 is required as a pulling margin for the worker, and this portion is currently discarded. It is desirable to make this scrap as short as possible in order to reduce the material cost of the film. Further, although the bag body 89 is mounted on the container, automation of the bag manufacturing work has been desired in order to perform a series of processes from the bag manufacturing process to the bag mounting process.

The present invention has been made in view of the above problems of the prior art. The bag making work can be automatically performed to improve the quality and workability of the product, and the bag making work occurs. It is an object to reduce the length of scrap to reduce the material cost.

[0006]

The technical means that the present invention has taken to solve the above-mentioned problems is to provide a pair of feed rolls 18 and 18a for feeding the flatly folded tubular film 3. A heater device 65 for heat-sealing the film 3 sent out by a predetermined length in a convex shape, and a cutting device 43 for cutting the tip end portion of the film 3 heat-sealed by the heater device 65 in the width direction to open it. In the bag making apparatus having the convex seal portion 4b on one side and the opening 4a on the other side, the feed rolls 18 and 18a can be reversed during or immediately after heat sealing. Yes, the heater device 65 includes a heater 73 for heating.
A heater unit 66 having a temperature sensor 75 and a heat seal blade 74, and a heater base 68 against which the heater unit 66 is pressed, and the film 3 and the heater unit 66 and the heater base 68 of the heater device 65 In between, when heating film 3
The long sheets 86a and 86b for preventing the sticking to the heater main body 67 and the heater base 68 are movably provided by a predetermined length, and the cutting device 43 has the cutter upper blade 44 and the cutter lower blade 46. Further, a pressing lever 57 is provided which is capable of releasably pressing the scrap 55 generated by cutting the film 3 with the lower cutter blade 46, swings together with the lower cutter blade 46, and discharges at a predetermined position. To be there.

[0007]

When the film feed rolls 18 and 18a feed the film 3 by a predetermined amount, the heater device 65 melts and welds the film 3 in a convex shape. Immediately after that, when the constant-size feed rolls 18 and 18a rotate in the reverse direction, the long film 3 moves in the opposite direction to the above-mentioned feeding direction. Therefore, if the film 3 is not completely melted at its seal portion. Even if it is, it is forcibly separated and can be surely divided.

Moreover, since the film 3 is moved in the direction opposite to the feeding direction, the cutting device is provided near the cutting end.
43 is cut, and as a result, the unnecessary scrap 55 cut by the cutting device 43 is shortened.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a container packaging device, which is a bag-making device 5 for forming a bag body 4 from a heat-shrinkable film 3 which is long and tubular.
A carrying device 7 for carrying the bag body 4 formed by the bag making device 5, and a bag body 4 carried by the carrying device 7.
A rotary device 12 for fitting the container 10 conveyed by the inlet conveyor device 9 and a final heater 14 for heating and shrinking the bag body 4 fitted in the container 10 are provided.

As shown in FIGS. 1 and 3, the bag making apparatus 5 moves the film 3 downward through a pair of film feed rolls 17 for feeding the film 3 wound in a roll shape and a horizontal guide roll 16. It is provided with a pair of constant-size feed rolls 18 and 18a for feeding a predetermined length. Reference numeral 21 denotes an inner guide inserted into the film 3 as shown in FIGS. 4 and 6, and an engaging portion 23 supported by an inner guide roll 22 is provided at one upstream end of the film 3 in the feeding direction. A spring rod 25 provided with a spherical piece 24 for tensioning the film 3 in the width direction is connected to the other end.

Reference numeral 27 denotes a pair of meandering detection photoelectric sensors for detecting both ends of the film 3 as shown in FIGS. 4, 5 and 7, which are arranged near the lower part of the guide roll 16. 28 is an electric motor for meandering correction, each photoelectric sensor 27
Detects the edge of the film 3 and the signal detects the edge of the film 3.
It is for correcting to a predetermined position so as not to meander.

That is, one end of the central shaft 16a of the guide roll 16 is pivotally supported by the frame 29 of the machine base so as to be slightly swingable, and the other end is inserted into the top 30. The meandering correction electric motor 28 is fixed to a frame 29 of a machine base 29a, and its rotation shaft 28a has a central axis 16a of the guide roll 16.
Is inserted in the top 30 so as to be eccentric. Therefore, by rotating the top 30 by the meandering correction electric motor 28, the other end of the guide roll 16 can be eccentric to adjust the tension balance acting on both sides of the film 3.
It becomes possible to correct the meandering of.

As shown in FIGS. 5 and 7, the constant-size feed rolls 18 and 18a are provided with gears 26 that mesh with each other.
On the pulley 31 fixed to one of the constant feed rolls 18,
A belt 32a, whose rotation is transmitted by the servo motor 32, is wrapped around. Therefore, the fixed-size feed rolls 18 and 18a are rotationally controlled so that they can be rotated inward to feed the film 3 downward and forward rotation to return the film 3 slightly upward. In addition, the constant feed roll 18, 18a
The large-diameter feed portions 33 and the small-diameter relief portions 35 are alternately provided so as to form the concave portions 34 in the circumferential direction, and both feed portions 33 press the film 3 from both sides.

Reference numerals 37 and 37a denote a pair of film guides arranged on both sides of the film 3, which are horizontal guide bodies 39 made of pipes, and pipes protruding from the guide body 39 in the direction of the film 3 and curved downward to hang down. And a plurality of guide portions 40. Each guide portion 40 is connected to the guide body 39 so as to be inserted into the concave portion 34 of the above-mentioned constant-size feed roll 18, and the air supplied to the guide body 39 is passed through the ejection port 40a of each guide portion 40. Is ejected downward.

Further, as shown in FIG. 8, one guide body
Between the guide part 40 connected to 39, the other guide body 39
The guide portion 40 connected to the is located, and the guide portions 40 are arranged in a so-called zigzag pattern. The horizontal projection length L of each of the guide portions 40 is set to be longer than the length L1 of the both guide main bodies 39 up to the center line O, and the film 3 passing through each guide portion 40 is It is sent out in a state of being pressed by the tip of the portion 40 and bent in an uneven shape.

Reference numeral 43 is a cutting device for cutting the film 3, as shown in FIGS.
It is provided below 18a, that is, at the downstream position. Cutting equipment
43 is a fixed cutter upper blade 44 fixed to the machine base side, and a cutter lower blade 46 fixed to a central shaft 45 rotatably supported via a bearing 47 at the base of the cutter upper blade 44. Become. A pulley 49 around which the belt 52 is wound is attached to the central shaft 45, and the cutter lower blade 46 is rotated about the central shaft 45 by a driving means (not shown). Incidentally, 53 is a nut screwed to the tip of the central shaft 45, and 54 is a disc spring.

A pin 56 is attached to the fixed cutter upper blade 44, and a base portion 57a of a pressing lever 57 is externally fitted to the pin 56 so as to be swingable. The pressing lever 57 is located in front of the lower cutter blade 46 in the rotational direction, and is urged downward by the return spring 59 externally fitted to the pin 56 so as to contact the lower cutter blade 46. In addition, the pressing lever 57 maintains the position (standby position) below the cutter upper blade 44 at the tip side,
The base 57a is in contact with the end face of the step 61 formed on the cutter upper blade 44.

The pressing lever 57 is pushed by the lower cutter blade 46 by the rotation of the lower cutter blade 46 and swings around the pin 56 against the return spring 59. Since the base of the blade 46 comes into contact with the engaging portion 57b formed by bending the pressing lever 57 up and down, the pressing lever 57 is separated from the lower cutter blade 46 (scrap open position).

Further, the base portion 57a of the pressing lever 57 has a sliding portion.
62 is provided, and by rotating the cutter lower blade 46, the sliding portion
A cam 62 is fixed to the cutter upper blade 44 through a bolt 58.
The inclined cam surface 64a of 64 slides. At that time, press lever
57 is disengaged from the cutter lower blade 46 that moves upward and rotates, and is restored to the standby position by the elastic force of the return spring 59. In addition, 63 indicates the scrap 55 when the pressing lever 57 releases the scrap 55 at the scrap release position.
It is an air nozzle for blowing away.

Reference numeral 65 denotes an R-shaped heater device provided at a position downstream of the cutting device 43 as shown in FIGS. 5 and 13 to 15, and a heater main body 67 having a heater portion 66 which is curved upward in a convex shape. And the heater base 68 against which the heater portion 66 is pressed
Consists of The heater section 66 is configured such that the sheath heater 73 for heating bent in a plurality of rows is inserted into the metallic tube 71, and the tube 71 and the heat seal blade 74 are sandwiched by a heat insulating sheet 76,
These are stored in a case 70 with a U-shaped cross section, and the pressing plate 77
It is fastened and fixed with a cap screw 78 through. Reference numeral 75 denotes a thermocouple which is inserted into the metallic tube 71 and serves as a temperature sensor. The thermocouple 75 detects the fusing and welding temperature of the film 3,
The temperature for fusing and welding is controlled to be optimum.

The heater pedestal 68 is mounted on the receiving body 80 at the center of the rear surface of the heater pad 81 via the spherical bearing 82, and the heater pad 81 can swing in any three-dimensional direction. The heat-sealing blade 74 of the above contacts the heater pad 81 evenly and surely over the entire length. The heater body 67 is an air cylinder 83.
The heater base 68 can be freely attached to and detached from.

Reference numerals 86a and 86b denote a pair of Teflon sheets wound around Teflon sheet bobbins 87a and 87b, respectively. Both Teflon sheets 86a pass between the heater body 67 and the heater base 68, and a take-up bobbin 89a. , 89b can be wound freely. Reference numerals 88a and 88b denote front opening-shaped guide bodies that cover the heater main body 67 or the heater base 68 and guide the Teflon sheets 86a and 86b.

The means for rotating the take-up bobbins 89a, 89b are, as shown in FIGS. 5 and 15, the take-up bobbins 89a, 89b.
Pulleys 91 and 91a respectively attached to support shafts 90 and 90a that support b, belts 92 wound around these pulleys 91 and 91a, and take-up bobbins 89 via belts 92.
deceleration motor 93 for rotating a and 89b in the winding direction, slack preventing lever 94 for applying tension to Teflon sheet 86b to prevent slack in heater body 67 side, and Teflon on heater base 68 side. One-way clutch 95 interposed on the support shaft 90 to prevent the seat 86a from rewinding.
Consists of

The two Teflon sheets 86, 86a are used for the film 3 when the film 3 is fused and welded by the R-type heater device 65.
Is attached to the heater portion 66 and the heater base 68, and is linked to the operation of the R-type heater device 65 so that it can be wound by moving a predetermined small amount.

The transfer device 7 includes a rotating wheel 99 that rotates in the direction of the arrow as shown in FIGS. 19 and 20, and a rotating wheel.
Claws 111 provided with a plurality of intervals in the circumferential direction of 99,
It is composed of an L-shaped pressing lever 112 which is swingable by a cam mechanism so as to come into contact with or separate from each claw 111.

Each claw 111 has a suction hole 114 for vacuuming the bag 4, and an air 118 for raising the bag 4.
And an air blowing passage 115 for ejecting the air upward. Air outlet 115 is piping 116
Is connected to the disk 117 to which the air on the rotating wheel 99 side is supplied via.

Reference numeral 120 denotes a recovery duct for recovering the scrap 55 cut by the cutting device 43, and is arranged below the cutter lower blade 46 of the cutting device 43 at the scrap release position as shown in FIGS. 17 and 18. Has been done. 12 in recovery duct
0 means the inlet opening 120a at the upper end and the outlet opening 120b at the lower end
Are formed respectively, and an air passage 122 opening downward is formed inside by the partition wall 121. 123 is the intake
The air taken in from the outside via 124
An electric fan for forcing the scrap 55 to be blown downward via the air blower 2, and is attached to the recovery duct 120 so as to be located in the blower path 122.

The rotary device 12 is provided with an opening device 125 for opening the bag body 4 cut into the predetermined size. The opening device 125 is a cam body fixed as shown in FIG.
A pair of openers 128, 128 a that are provided with 126 and can be opened and closed with respect to the cam body 126 are provided radially at equal intervals.

That is, the pair of openers 128 and 128a are
It is swingable so that its tip end side can be attached to and detached from a ring-shaped rotating body 129, which is located on the left and right sides with respect to the radial center line L and is rotatable in the circumferential direction, via a pivot shaft 130. It is provided. Suction portions 131 1 and 131 are provided at the tip portions of the openers 128 1 and 128 a, and suction holes for sucking both pieces of the flat bag body 4 are formed on the inner surfaces of the suction portions 131 1 and 131. Has been done.

On the base side of both openers 128, 128a,
Protrusions 139 and 139a that engage with each other are provided,
When the one opener 128 is swung in the expanding direction, the other opener 128a is also swung in the expanding direction. Further, a lever 134 for opening and closing motion having a guide roll 132 at the tip thereof is projectingly provided at the base of one opener 128.

Reference numeral 135 denotes an annular holder located between the rotating body 129 and the cam body 126, and the annular holder 135 is adapted to rotate integrally with the rotating body 129. The annular holder 135 is provided with a plurality of opening / closing amount adjusting levers 136 corresponding to the respective openers 128, 128a.

The base of each opening / closing amount adjusting lever 136 is a pin.
It is pivotally supported via 137, and the cam body 126 is
A cam follower 138 that rolls on the outer cam surface 126a is provided. The width of each opening / closing amount adjusting lever 136 increases from the base side toward the tip, and the outer guide surface 13
The guide roll 132 is in contact with 6a. The annular holder 135 is provided so as to be movable and adjustable in the circumferential direction with respect to the cam body 126 and the rotating body 129. Therefore, the position of the guide roller 132 of the opening / closing movement lever 134 that contacts the opening / closing amount adjusting lever 136 is changed. Opener 128,
The opening amount of 128a can be adjusted.

Reference numeral 140 is a spring as an elastic body for urging the openers 128 and 128a toward each other, one end of which is connected to the base side of the other opener 128a and the tip of one of the openers 128 is connected. It is connected to the side. Therefore, the spring 140 has both openers 128,
It is oblique to 128a.

The opening device 125 having the above-described structure is used for the bag body 4 held by the pawl body 111 and the pressing lever 112 of the carrying device 7.
When the open / close amount adjusting lever 136 engages with the receiving position A held between the openers 128 and 128a and received from the transfer device 7 and the recess 126b formed in the cam body 126, one opener 128 is opened with the other opener 128. 128a is pushed and the film shift position B where the suction parts 131 and 131 are relatively displaced beyond the center line L, the opening position C where the bag 4 is gradually opened, and the container 10 is inserted into the opened bag 4. And an insertion position D are sequentially provided.

Next, the carrying process of the container 10 will be described. 1 and 2, the inlet conveyor device 9
Has a screw 147 located on the side of the container 10 and a thin steel belt 148 on which the container 10 is placed and which circulates and rotates.

22 and 23, the container positioning device 149 is provided with a rotary table 151 fixed to a rotary shaft 150 that is rotationally driven, and is arranged in the circumferential direction of the rotary table 151. Is provided with a plurality of container tables 152.

The table 152 for each container is a steel belt 14
8 While passing through the lower surface of the upper transfer unit 148a while coming into contact with or in close proximity, the small geared motor 155 is capable of rotating on its own axis. 154 is a rotary encoder connected to the rotary shaft 153 rotated by the geared motor 155, and 156 is a timing belt wound around a sprocket 153a provided on the rotary shaft 153 and a sprocket 161a provided on the container table 152. is there.

158 is a registration mark provided on the surface of the container 10.
159 sensor for each container table 15
It is provided corresponding to 2. The signal of each sensor 158 is sent to the control device 160, and when the control device 160 receives the signal, the rotation angle of the container table 152 is controlled based on the signal of the rotary encoder 154 to stop the container 10 at a predetermined position. To do.

Reference numeral 161 denotes a pressing body for pressing and fixing the upper surface of the mouth of the rotating container 10, which is a rotary table 151.
A holding body 164 that moves up and down by a cam mechanism as it rotates.
Is provided rotatably. 162 is a pair of fixed arms for sandwiching and fixing the aligned container 10, which is provided so as to be openable and closable by a cam mechanism.

Reference numeral 163 denotes an openable / closable clamper located in the circumferential direction of the opening device 125 and below each of the openers 128, 128. The clamper 163 releases the positioned container 10 on the container table 152. Clamp it freely and receive it on the rotary device 12 side.

Reference numeral 168 denotes a table which can approach the container 10 from below and can be placed on the container 10 and which can be moved up and down by a cam 169 so as to separate the container 10 and is provided below each clamper 163. Here, the friction coefficient between the clamper 163 and the bag body 4 is set to be larger than the friction coefficient between the bag body 4 and the container 10.

As shown in FIG. 25, 170 is a pre-heater device for contracting the lower part of the bag body 4 fitted in the container 10 and is provided below the container 10. The pre-heater device 170 is provided with a hot air jet nozzle 171 on its upper part. The hot air jet nozzle 171 has guide plates 172 provided at predetermined intervals and inclined so that hot air supplied from the hot air inlet 173 can be jetted from the upstream side to the downstream side of the traveling direction of the container 10. Is.

Reference numeral 175 is an outlet star wheel for supplying the container 10 in which the lower part of the bag body 4 is pre-shrinked to the heater conveyor 176. The heater conveyer 176 is arranged so as to pass through the inside of the main heater 14, and heats and shrinks the entire bag body 4 of the container 10 conveyed by the heater conveyer 176.

The embodiment of the present invention is constructed as described above, and then the above-mentioned apparatus is used to form the bag 4 from the film 3,
A case where the bag body 4 is attached to the container 10 will be described.

First, when the long flat film 3 wound on the roll is fed by the rotation of the film feed roll 17, the spherical piece 24 of the inner guide 21 causes the elastic force of the spring rod 25 to move. The film 3 is thus tensioned in the width direction. As a result, even if folds are formed at both ends of the film 3, the spherical piece 24 slides while pressing the folds of the film 3, so that the folds can be eliminated and the opening of the film 3 can be easily performed. To

Further, as shown in FIG. 8, the film 3 is pushed by the guide portions 40 of the film guides 37, 37a on both sides to form a plurality of bent portions 3a in the longitudinal direction of the film. Therefore, the film 3 has a so-called waist which increases rigidity in the longitudinal direction, and air is blown downward from each guide portion 40, that is, in the sending direction, so that the film 3 having rigidity can be sent straight. With the film guides 37 and 37a imparting rigidity to the film, the film 3 can be fed out reliably and smoothly, and troubles in the apparatus due to defective feeding of the film can be eliminated.

Further, when the photoelectric sensor 27 for detecting the meandering detects each edge of the film 3 during the feeding of the film 3, the electric motor 28 for correcting the meandering is operated by the signal and the film 3 is moved to a predetermined position on the guide roll 16. Correct to position.

For example, when the film 3 moves to the left with the electric motor 28 for meandering correction as shown by the phantom line in FIG. 7, the sensor 27 on the left side detects the edge of the film 3. At this time, the meandering correction electric motor 28 eccentrically moves the guide roll 16 as shown by the arrow in FIG. 4 to increase the tension on the left side of the film 3 and shifts it to the right side, so that the film does not meander at a predetermined position. It becomes possible to send out 3.
On the contrary, when the sensor 27 on the right side detects the edge of the film 3, the guide roll 16 may be eccentrically moved in the opposite direction.

Further, the heater main body 67 of the R-type heater device 65 advances to press the film 3 against the heater base 68, and the film 3 is fusion-welded as shown in FIG. 16 and has an opening 4a at the bottom and an upper end. A bag body 4 having a convex seal portion 4b is formed. At the time of fusing and welding of the R-type heater device 65, the thermocouple 75 detects the temperature of the sheath heater 73 and controls the heater temperature, so that an optimal fusing and welding temperature can always be obtained.

Further, although the Teflon sheet 86a may be loosened due to the backward movement of the heater portion 66, the loosening prevention lever 94 is rotated by a spring to tension the Teflon sheet 86a. Also, the Teflon sheet 86b on the heater base 68 side is not loosened in the direction opposite to the winding due to the action of the one-way clutch 95.

Moreover, since the heat seal blade 74 heats the film 3 via the Teflon sheets 86a and 86b, the heated portion of the film 3 does not adhere to the heat seal blade 74 and the heater base 68, and Teflon sheet 86
Since a and 86b are wound up on the Teflon sheet bobbins 87a and 87b little by little, a new Teflon sheet 86a is always available.
, 86b can be used, and the Teflon sheets 86a, 86b can be used for a long time without deteriorating the adhesion preventing function.
No need to replace.

When or immediately after the film 3 is fused and welded as described above, the film feed roll 18 reversely rotates in the opposite direction to the above, and the film 3 is returned slightly upward. By the reverse transfer of the film 3, the seal portion is pulled and reliably separated.

When the leading end of the film 3 is returned upward,
The film 3 is linearly cut by the cooperation of the rotating cutter lower blade 46 and the fixed cutter upper blade 44. As shown in FIG. 16 (a), the cutting position L is shorter than the cutting position L1 when the film 3 is not rewound, and the length of the scrap 55 cut is shorter. Saves

When the film 3 is cut, the pressing lever 57 at the standby position clamps the scrap 55 with the rotating cutter lower blade 46 and resists the elastic force of the return spring 59. While being held, the cutter lower blade 46 rotates the pressing lever 57 together. When the lower cutter blade 46 and the pressing lever 57 rotate about 90 ° and are positioned above the recovery duct 120, the lower cutter blade 46 pushes the engaging portion 57b of the pressing lever 57, so that the pressing lever 57 moves the lower cutter blade 46. And the air nozzle 63 is scrap 55.
Can be blown off and dropped into the recovery duct 54. The scrap 55 in the recovery duct 54 is forcibly sent downward by the blowing of the electric fan 123, and can be reliably collected from the outlet opening 120b of the recovery duct 54 into the recovery box 180 and disposed of properly.

When the pressing lever 57 is further rotated, as shown in FIG. 12, the inclined cam surface 64 of the cam 64 to which the sliding portion 62 is fixed is fixed.
To slide a, the pressing lever 57 is moved upward against the elastic force of the return spring 59, the engagement with the cutter lower blade 46 is released, and the return spring 59 returns to the standby position. Further, since the cutter lower blade 46 is configured to rotate, compared to the case where the cutter lower blade 46 swings, it is not necessary to wait for the next step until the cutter lower blade 46 returns, so that the work after cutting work can be performed. It is possible to speed up.

The bag body 4 fused and welded as described above is adsorbed by the rotating claw body 111 of the carrying device 7 and is clamped by the pressing lever 112 being closed, and the heater device
Emitted from 65. The bag body 4 sandwiched between the claw body 111 and the pressing lever 112 blows air 118 upward from the air blowing passage 115 of the claw body 111, so that the bag body 4 is conveyed in an upright state and at the delivery position. It is delivered to the openers 128, 128a of the rotating rotary device 12 (see FIG. 19).

On the other hand, the container 10 is sequentially conveyed by the screw 147 and the steel belt 148 of the entrance conveyor device 9, and the container 10 on the steel belt 148 is delivered to the container table 152 of the rotary table 151. It should be noted that the use of the steel belt 148 has an advantage that the space can be reduced as compared with the case of using a star wheel for delivery.

When the container 10 is delivered, the pressing pad 141
The container table 152 is rotated by the geared motor 155 while pressing the upper part of the container 10 so that the container 10 does not fall and the container 10 is not displaced. At that time, the sensor 158 detects the registration mark 159 of the container 10. The signal from the sensor 158 is the control device 16
Then, the control device 160 controls the rotation angle of the container table 152 to stop the container 10 at a predetermined position. container
When the positioning of 10 is completed, the fixing arm 161 fixes the container 10, and the clamper 163 of the rotary device 12 clamps and receives the container 10.

At the receiving position A of the rotary device 12, the suction portions 131, 131 of both openers 128, 128a are received.
Closes to hold the bag body 4 held by the claw body 111 and the pressing lever 112.

The opening / closing amount adjusting lever 136 that rotates rotates the cam body 12
Since the spring 140 further swings the one opener 128 when the recessed portion 126b of 6 is moved, the suction portion 131 of the one opener 128 pushes the other opener 128a to cross the center line L and to open the other opener 128a. It will reach the 128a side. For this reason, both suction parts 131 and 1 which were opposed to each other
31 is relatively displaced, and the two pieces of the bag body 4 adsorbed by the respective suction portions 131 1 and 131 are relatively slipped.

Accordingly, if the cutting device 43 is used, the film 3
By cutting, even if the cutting edges are fused or both side surfaces are in close contact with each other, a gap can be formed between both pieces of the bag body 4, and the bag body 4 can be easily and surely formed. It can be separated.

Further, the opening / closing amount adjusting lever 136 is attached to the cam body 126.
At the time of shifting, the openers 128 and 128a are gradually opened and lowered, and the bag body 4 is fully opened at the insertion position D, and is fitted into the container 10 placed on the table 168 of the container positioning device 149. (See Figure 24 (a)). Furthermore,
The clamper 163 holds the container 10 and holds it opener.
The suction portions 131 1, 131 of 128, 128 a stop suction, are separated and gradually rise, and are separated from the bag body 4 (see (b) and (c) of the same figure).

Further, the table 168 raises the container 10 slightly by the cam 169. At this time, the friction coefficient between the clamper 163 and the bag body 4 is set to be larger than the friction coefficient between the bag body 4 and the container 10. Therefore, it is possible to completely push the container 10 to the upper part of the bag body 4 (Fig. (B),
(C)).

Further, the container 10 held between the clampers 163
When the preheater device 170 is conveyed to the preheater device 170, the preheater device 170 jets hot air obliquely upward from the upstream side to the downstream side in the traveling direction of the container 10. Therefore, if hot air is blown upward, the lower part of the rear portion of the bag body 4 in the traveling direction is less likely to shrink along the bottom surface of the container 10, but hot air is blown from the rear of the container 10 as described above. Because of the jetting, the lower portion of the bag body 4 can be uniformly contracted along the bottom surface of the container 10.

The container 10 in which the bag body 4 is pre-shrinked as described above.
Is transferred to the exit star wheel 175, is conveyed by the heater conveyor 176, and then passes through the main heater 14 for finishing, so that the bag body 4 is completely contracted so as to be in close contact with the container 10. Since the containers 10 are positioned as described above, the characters, patterns, etc. provided on the bag body 4 are located at the same portion of each container 10.

The present invention is not limited to the above-described embodiment. For example, as means for discharging the scrap 55 in the recovery duct 120, other than the electric fan, recovery as shown by phantom lines in FIG. It may be a nozzle 181 that blows air as desired inside the duct 120. Further, in the above-mentioned embodiment, the heat sealing blade 74 is used for fusing and welding the film 3 at the same time. However, the heat sealing blade 74 is exclusively used for welding the film 3 so that a separate convex cutting is performed. The blade 74a is heat-sealed as shown by the phantom line in FIG.
The film 3 may be provided in the vicinity of the upper part of 74 and cut into a convex shape by the cutting blade 74a. In this case, the tip of the heat-sealing blade 74 is formed flat.

[0067]

As described above, according to the present invention, the sizing feed roll is reversely rotated at the time of or immediately after heat-sealing the film by the heater device, and the film is cut by the cutting device after the reverse rotation. Therefore, bag making work can be performed automatically, improving product quality and workability, and
Since the film is returned and cut by the cutting device, the length of unnecessary scrap can be shortened and the material cost can be reduced.

The heater device comprises a heater body having a heater portion and a heater base against which the heater portion is pressed. The heater portion inserts a sheath heater and a temperature sensor into a metal tube, and heat seals the metal tube. Since the blade and the blade are wrapped with a heat insulating sheet and these are provided in the case, temperature control of the heater portion is facilitated, and the film can be fused and welded at an optimum temperature.

Further, since the heater base is supported via the spherical bearing, the heater base can be moved in any direction, and therefore the film can be evenly and reliably fused and welded by the heater portion.

Between the film and the heater section of the heater device and the heater stand, a long sheet for preventing the film from adhering to the heater section and the heater stand during heating is movable by a predetermined length. When the slack prevention means for preventing slack of both sheets is provided, it is possible to prevent the film from adhering to the heater part and the heater base, and to prevent continuous slack welding of the sheet and to perform continuous fusing and welding work. This can be done and troubles can be prevented.

The cutting device comprises an upper cutter blade and a lower cutter blade, the lower cutter blade is rotatably provided, and a pressing lever for releasably pressing scrap generated by cutting the film with the lower cutter blade is provided. Since the pressing lever can be separated from the lower cutter blade so that scrap can be discharged at a predetermined swing position of the lower cutter blade, the scrap can be separated from the bag and discarded reliably. Moreover, since the cutter lower blade is configured to rotate, the cutting operation can be performed quickly, and the automation of the bag making operation can be facilitated.

[Brief description of drawings]

FIG. 1 is an overall schematic perspective view showing an embodiment of the present invention.

FIG. 2 is an overall schematic plan view of the same.

FIG. 3 is a perspective view of a bag manufacturing device.

FIG. 4 is a schematic side view of the bag manufacturing apparatus.

FIG. 5 is a schematic side view of the bag manufacturing apparatus.

FIG. 6 is a partially cutaway plan view showing an inner guide inserted into a film.

FIG. 7 is a front view showing a partially broken view of an embodiment of the present invention.

FIG. 8A is a plan view including a partial cross section of the film guide, and FIG. 8B is a side view including a cross section of the same portion.

FIG. 9 is a side view including a partial cross section showing a cutting device.

FIG. 10 is a side view including a partial cross section showing the cutting device.

FIG. 11 is a plan view showing a cutting device.

FIG. 12 is a plan view showing the film open position.

FIG. 13 shows a heater body, (a) is a front view, (b)
Is a sectional view.

FIG. 14 shows a heater device, (a) is a plan view including a partial cross section, and (b) is a side view including a partial cross section.

FIG. 15 is a plan view including a partial cross section showing a winding means for a Teflon sheet.

16A is a front view of the film, and FIG. 16B is a perspective view of the bag body.

FIG. 17 is a schematic cross-sectional view showing a recovery duct.

FIG. 18 is a plan view of the same.

FIG. 19 is a plan view showing a partially broken view of the transport device.

FIG. 20 is a front view showing the same portion broken.

FIG. 21 is a plan view showing an opening device.

FIG. 22 is a sectional front view showing the container positioning device.

FIG. 23 is a plan view of the same.

[FIG. 24] (A) to (E) are front views including partial cross sections each showing a state in which the film opened in the opener is fitted into the container.

[FIG. 25] (A) to (E) are front views including partial cross sections each showing a state in which a container in which a film is fitted is heated and shrunk while being conveyed.

26 (a) and (b) are perspective views showing a conventional example.

[Explanation of symbols]

3 ... Film, 4 ... Bag, 4a ... Opening, 4b ... Sealing,
18, 18a ... Constant size feed roll, 37, 37a ... Film guide, 65 ... Heater device, 43 ... Cutting device, 44 ... Cutter upper blade, 46 ... Cutter lower blade, 54 ... Recovery duct, 55 ... Scrap, 57 ... Pressing Lever, 63 ... Air nozzle, 66 ... Heater part, 68 ... Heater base, 70 ... Case, 71 ... Tube, 73 ...
… Seeds heater, 74… Heat seal blade, 76… Insulation sheet, 82… Bearings, 86, 86a… Teflon sheet

Claims (6)

[Claims] 1. A pair of feed rolls (18) for feeding a flat tube-shaped film (3).
(18a), a heater device (65) for heat-sealing the film (3) fed out by a predetermined length in a convex shape, and a cutting for cutting the film (3) in the width direction so as to open the front end portion thereof. A bag making apparatus comprising a device (43), a convex seal portion (4b) on one side, and an opening (4a) on the other side. During or immediately after heat-sealing with the heater device (65), the feed rolls (18) and (18a) are reversed, and after the reversal, the cutting device (43) is used to form the film (3).
A bag-making device having a structure for cutting a bag. 2. A pair of feed rolls (18) for feeding a flat film (3) folded in a flat shape,
(18a), a heater device (65) for heat-sealing the film (3) fed out by a predetermined length in a convex shape, and a cutting for cutting the film (3) in the width direction so as to open the front end portion thereof. A heater (65), which is a bag-making apparatus including a device (43), and having a convex seal portion (4b) on one side and an opening (4a) on the other side. Is a heater body (67) having a heater part (66)
And a heater base (68) against which the heater section (66) is pressed. The heater section (66) includes a heater (7) for heating.
3) Insert the temperature sensor (75) into the metallic tube (71), wrap the metallic tube (71) and the heat seal blade (74) with a heat insulating sheet (76), and put them inside the case (70). A bag-making device, characterized in that it is provided in the. 3. A pair of feed rolls (18) for feeding a flat tubular film (3),
(18a), a heater device (65) for heat-sealing the film (3) fed out by a predetermined length in a convex shape, and a cutting for cutting the film (3) in the width direction so as to open the front end portion thereof. A heater (65), which is a bag-making apparatus including a device (43), and having a convex seal portion (4b) on one side and an opening (4a) on the other side. Is a heater body (67) having a heater part (66)
And a heater base (68) against which the heater part (66) is pressed, and the heater base (68) is supported via a spherical bearing (82). 4. A pair of feed rolls (18) for feeding a flat tubular film (3),
(18a), a heater device (65) for heat-sealing the film (3) fed out by a predetermined length in a convex shape, and a cutting for cutting the film (3) in the width direction so as to open the front end portion thereof. A bag making apparatus comprising a device (43), a convex seal portion (4b) on one side, and an opening (4a) on the other side, wherein the film (3) A long sheet (86a), (86b) for preventing the film (3) from adhering to the heater device (65) during heating can be moved by a predetermined length between the heater device (65) and the heater device (65). The bag-making apparatus, which is provided at the bottom of the bag, and is provided with slack prevention means for preventing slack of the sheets (86a) and (86b). 5. A pair of feed rolls (18) for feeding a flat tubular film (3),
(18a), a heater device (65) for heat-sealing the film (3) fed out by a predetermined length in a convex shape, and a cutting for cutting the film (3) in the width direction so as to open the front end portion thereof. A cutting device (4) comprising a device (43), a bag body (4) having a convex seal portion (4b) on one side and an opening (4a) on the other side.
3) comprises a cutter upper blade (44) and a cutter lower blade (46), the cutter lower blade (46) is rotatably provided, and scraps (5) generated by cutting the film (3)
A pressing lever (57) for releasably pressing the cutter lower blade (46) with the cutter lower blade (46) is provided so as to be swingable at a predetermined angle so that the scrap (55) can be scraped at a predetermined swing position of the cutter lower blade (46). The pressure lever (57) is provided with a cutter lower blade (4
A bag-making machine characterized by being separable from 6). 6. A pair of feed rolls (18) for feeding a flat film (3) folded in a flat shape,
(18a), a heater device (65) for heat-sealing the film (3) sent out by a predetermined length in a convex shape, and a tip portion of the film (3) heat-sealed by the heater device (65). A cutting device (43) for cutting in the width direction to open it, and a convex seal part (4b) on one side
In the bag making apparatus for forming a bag body (4) having an opening (4a) on the other side, the feed rolls (18), (18)
a) can be reversed during or immediately after heat sealing, and the heater device (65) has a heater part (66) having a heater (73) for heating, a temperature sensor (75) and a heat seal blade (74). And a heater stand (68) against which the heater section (66) is pressed, the film (3), the heater section (66) of the heater device (65), and the heater stand (6).
A long length of sheet (86a), (86b) for preventing the film (3) from adhering to the heater body (67) and the heater base (68) during heating between The cutting device (43) includes a cutter upper blade (44) and a cutter lower blade (46), and the scrap (5) is generated by cutting the film (3).
A bag making machine characterized in that it is provided with a pressing lever (57) capable of releasably pressing 5) with the cutter lower blade (46), swinging together with the cutter lower blade (46) and discharging at a predetermined position. apparatus.