JP2681449B2 - Packaging equipment using tube film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging device using a tubular plastic film.

[0002]

2. Description of the Related Art A flat tube made of a thermoplastic film is used, a bottom seal is applied to the tube to make an outer bag, and a folded bag or other loose article is loaded from the other end. Then, an entrance seal is provided and cut to form an independent package, which is disclosed in JP-A-51-82.
No. 190, JP-A-52-123791, JP-A-53-104392, etc.
In these prior arts, a filling device and a clamp mechanism are arranged in the upper region, a core is inserted in a flat tube in the lower region, and in this state, the core and the flat tube are placed on both sides by a vertically movable clamping means. From above, grasp the mouth end of the tube with the claws and jaws of the clamp mechanism, at this time, release the pinching of the pinching means and drop the core to the lower limit position by its own weight. The tube immediately above the core is heat-sealed to form a bottom seal, the bottom seal is cut off, and a filling device is used to fill the object to be packaged from above and to seal the mouth.

In such a process, it is indispensable to apply a strong pressing force from both sides of the tube by the heat sealing element to bring the films into close contact with each other in order to form a bottom seal having good adhesive strength. However, as a result, due to thermal influence, pressing force, static electricity, etc., the film part immediately below the cutting part, that is, the part that will be the mouth in the next bag, will be in close contact (blocking state) directly above the core. Inevitable. However, in the prior art, when one package is completed and moved to the next cycle,
All that is required is to operate the clamping means to clamp the tube from both sides and move it to the clamping mechanism located above and integral with the core. Therefore, the blocking state as described above is delivered to the clamp mechanism without being released. However, since the films are in close contact with each other, it is difficult to insert the nail, and the film cannot be easily separated by blowing air. For this reason, in the prior art, there was a problem that the tube mouth opening mistake frequently occurred and the operation had to be stopped every time, and smooth and stable continuous bag making / packing could not be performed. Further, in the prior art, since the core raised to be delivered to the clamp mechanism is dropped by its own weight at least a distance corresponding to the bag length, noise is generated due to the collision between the core and the receiving member at each packaging. Therefore, there is a problem that the working environment is deteriorated and the receiving member and the core that regulate the lower limit position of the core are deformed and damaged in a short period of time, resulting in an increase in running cost.

The present invention was devised in order to solve the above-mentioned problems, and its purpose is to reliably release the blocking phenomenon due to the seal cut right above the core to make a completely open mouth error. Another object of the present invention is to provide a packaging device using a plastic film tube that can smoothly perform continuous packaging unmanned for a long time.

[0005]

In order to achieve the above object, the present invention provides a retractable bottom provided with a heat sealer and a cutting blade in an upper region of a core held in a fixed position on a moving path of a tube film. A seal cut mechanism is provided, and an upper and lower bag mouth seal mechanism having a heat sealer and a clamper for sandwiching a pressure immediately below the seal position is provided above and below the bottom seal cut mechanism, and the bag mouth seal mechanism is provided. In the vicinity, there is a loading hopper for the objects to be packaged and a tube opening clamper that comes in contact with and separates from the outer surface of the lower cylinder of the loading hopper. A charging mechanism is provided above the charging / withdrawing mechanism for feeding an object to be packaged through a charging hopper, and below the bottom seal cutting mechanism, on the outer surface of the core after seal cutting. Then, the film tube is forcibly sunk downwards to release the close contact of the film directly above the core to create a tube opening, and then the film opening is properly moved upward to fit the tube opening into the loading hopper straight tube. It is provided with a blocking releasing mechanism for feeding. Examples of the blocking releasing mechanism include a pad, a pair of clampers having an actuator for moving the pad closer to and retracting from the outer surface of the core, and a mechanism having an actuator for appropriately moving the clampers up and down. Instead of this, the blocking releasing mechanism may include a pair of forward and reverse rotatable rollers and an actuator that moves the rollers toward and away from the outer surface of the core. The bag closure mechanism is preferably configured to be rotatable about a vertical axis by at least 90 degrees to allow the package to be ejected.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 11 show a first packaging device according to the present invention.
An example is shown. Reference numeral 1 denotes a main body frame, on which a horizontal base 1a is stretched at an intermediate level in the height direction and an envelope receiving base 1b is stretched at an upper level. Further, a support base 1c for supporting the original film of the tube film wound in a coil shape is provided on a side portion of a level lower than the horizontal base 1a. Reference numeral 2 is a core, and as shown in FIGS. 3, 4 and 11, has a relatively thin plate portion 20 and a taper portion 21 which is gradually thinned toward the tip and widened. However, the upper end has a projection 22 having a smaller cross-sectional area than the board 20. Then, as shown in FIGS. 3 and 4, the pair of guide rollers 30 rotatably mounted on the body frame 1 respectively.
The guide roller 31 and the guide roller 31, respectively,
The core 2 is supported at a fixed position by contacting with, and in this state, the protrusion 22 is located slightly above the opening 100 provided in the horizontal base 1a. 4 is an opening 100 on the horizontal base 1a
Translational actuator 4 fixed on the horizontal base 1a, which is a bottom seal-cutting mechanism provided in an opposed manner by sandwiching
a and 4b, and a movable body 4 which is connected to the distal ends of the operating portions of the translational actuators 4a and 4b and can slide on the horizontal base 1a.
0a and 40b. Each moving body 40a, 40b
The heat-resistant pad 4 for chucking a tube film slightly above the protrusion 22 of the core 2 on the opposite surface of
00a and 400b are attached, and the impulse heater 41 is attached to one moving body 40a along the surface of the heat resistant pad 400a.
A cutting blade guide groove 402a is provided below 1. The cutting blade guide groove 402 is provided on the other moving body 40b.
A cutting blade guiding groove 402b is provided at a position corresponding to a, and a cutting blade 44 that is moved forward and backward by a blade driving actuator 43 fixed to the moving body 40b is arranged in the cutting blade guiding groove 402b. .

Reference numeral 5 denotes a bag mouth sealing mechanism provided at a level appropriately lower than that of the object receiving base 1b. As shown in FIGS. 3 and 4, the bag mouth sealing mechanism 5 has a pair of sealing actuators 5a and 5b on the upper side at a 180-degree symmetrical position.
On the lower side, a pair of clamp actuators 5a ', 5
It has a unit support 5c in the shape of a U-shape, a U-shape, or a rectangular frame, to which b'is respectively fixed, and actuators 5a, 5b for sealing and an actuator 5 for clamping.
Heat-resistant pads 50a, 50b for clamping the tube film are provided at the respective working end of a ', 5b'.
50a 'and 50b' are attached, and an impulse heater 51 is attached to one heat resistant pad 50a of the sealing actuator 5a. Reference numeral 6 denotes an ascending / descending loading / drawing mechanism that also serves as a loading guide means and a tube withdrawing means for the article to be packaged W, and is provided on the vertical line of the core 2 and concentric with the bag mouth sealing mechanism 5. The feeding / pulling-out mechanism 6 includes a supporting body 6 in which a feeding hopper 60 is inserted and fixed.
The supporting body 6c has a pair of clamping actuators 6a and 6b fixed to the lower portion thereof, and the charging hopper straight-cylindrical portion 600 protruding from the supporting body 6c is provided at the operation end of the clamping actuators 6a and 6b. Pads 61a and 61b for clamping the tube opening portion t which is fitted to the outside are attached. The support 6c has a guide rail 10 whose outer end is provided on the body frame 1 as shown in FIG.
0 is held by a sliding body 62,
2 is moved up and down by an actuator such as a ball screw 64 and a servomotor 63 that drives the ball screw 64, and the bag length is set by the amount of this vertical movement. Instead,
As shown in FIG. 13, pulleys (or sprocket wheels) are provided on the main body frame above and below the guide rail 100, and the lower or upper pulley 65 is driven by the servo motor 63, and the timing between the upper and lower pulleys is set. A belt drive system may be used in which a belt (or a chain) 65 is spanned, and both ends of the timing belt 65 are connected to upper and lower portions of the sliding body 62. The bag mouth sealing mechanism 5
Is the total required stroke, that is, the hopper straight cylinder part 600.
The tube opening t fitted onto the can is lifted and lowered within a range necessary for pulling out from the straight tube portion 600. Moreover, the bag mouth sealing mechanism 5 can rotate at least 90 degrees about the vertical axis in order to transfer the completed package to the carry-out position. That is, the bag mouth sealing mechanism 5 also serves as a package discharging mechanism. Specifically, as shown in FIG. 4, the main body frame 1 is located 180 degrees symmetrical to the sliding body 62.
Bracket 54 fixed to the lifting actuator 53
Is provided, and a sliding body 56 having the rotating actuator 55 mounted is provided at the operating end of the lifting actuator 53, and the rear portion 50c of the unit supporting body 5c is coupled to the output shaft 560 of the sliding body 56. In addition, in the main body frame corresponding to the rotation end position of the bag mouth sealing mechanism 5, FIG.
As described above, the discharge shooter 101 is provided, and the downstream thereof communicates with the discharge port 102 of the main body frame 1.

Reference numeral 7 denotes a charging mechanism for feeding the object W to be packaged located on the object receiving base 1b through the input hopper 60 to the bottom sealed tube T ', which is provided on the upper portion of the main body frame 1. ing. In this embodiment, the packaged object W
Is a bag made of a sheet of a plastic film, for example, a set of a plurality of sheets, and the article W to be packaged is made by a bag making machine adjacent to the present apparatus (not shown), and as shown in FIG. It is adapted to be stacked on the object receiving base 1b by the transfer means 71. The loading mechanism 7 has a folding loading plate 70 that can be raised and lowered along the center line of the loading hopper 60. Reference numeral 8 denotes a blocking releasing mechanism which is arranged below the bottom seal cut mechanism 4 and directly below the horizontal base and on both sides of the core disc portion 20. The blocking releasing mechanism 8 contacts the outer surface of the core 2 after the seal is cut, and forcibly shunts the tube T in the lower direction of the core, thereby separating the block cking portion tb formed immediately above the core and opening the tube. Department t
Is created and the tube opening t is extended again by an appropriate amount so as to be fitted onto the straight cylindrical portion 600 of the charging hopper 60. In this embodiment, the blocking releasing mechanism 8 is a plate of the core 2. Abutment 1d stretched to a level equal to or close to the guide roller 30 for the portion 20
A pair of lifting actuators 80a, 80 fixed to the
b, supports 81a and 81b fixed to the operating ends of the lifting actuators 80a and 80b, and a support 8
1a and 81b, a pair of clamp actuators 82a and 82b are mounted opposite to each other, and clamp pads 83a and 83b attached to the operating ends of the clamp actuators 82a and 82b.

12 and 13 show a second embodiment of the present invention. In this embodiment, the blocking releasing mechanism 8 is a roller type which can reversibly rotate and can swing in the opening / closing direction. That is, first, a pair of parallel shafts 84a and 84b are horizontally mounted on the main body frame 1 below the horizontal base 1a so as to cross the vicinity of both surfaces of the tapered portion 21 of the core 2 via bearings. 8
Guide rollers 32, 32, which come into contact with the tapered portion 21 of the core 2, are attached to 4b in a freely rotatable manner. A pair of holding levers 85a and 85b extending upward are pivotally supported near both ends of each of the parallel shafts 84a and 84b, and the holding levers 85a and 85b can contact the board portion 20 of the core 2. Rubber rollers 86a, 86
Shaft portions 860a and 860b of b are rotatably supported. The horizontal ends of the holding levers 85a and 85b are connected to the working ends of the neck-down type actuators 87a and 87b whose base ends are connected to the main body frame 1. Therefore, when the actuators 87a, 87b are operated in the backward direction, the holding levers 85a, 85b are tilted outward with the parallel shafts 84a, 84b as fulcrums, whereby the rubber rollers 86a, 86b are separated from the board portion 20 of the core 2. Then, when the actuators 87a and 87b are operated to the forward side, the rubber rollers 86a and 86b come into contact with the board portion 20 of the core 2. The shaft portion 860a, 860b and the parallel shaft 8
A transmission element 861a such as a pulley (or sprocket) and a timing belt (or chain) is provided between 4a and 84b.
861b, parallel shafts 84a, 84
Gears 840a and 840b meshing with each other are provided at the other end of b.
And means 87 for driving the same. The drive means 87 is the rack 8 that meshes with the gear 840a in this embodiment.
70 and an actuator 871 for translating the same. However, the present invention is not limited to the dirt, and a reversible motor or rotary actuator may be used, and the output side thereof may be connected to either one of the parallel shafts 84a and 84b to be a direct drive type. Since the other mechanism is the same as that of the first embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

[0010]

Since the present invention has the above-described structure, when the object W to be packaged is packed in the film tube T, the core 2 is inserted into the film tube T, and the core 2 is inserted into the film tube T. 2 is held in a fixed position by the guide rollers 30 and 31, and the bottom seal cutting mechanism 4, the bag mouth sealing mechanism 5, the loading / drawing mechanism 6, the charging mechanism 7, and the blocking releasing mechanism 8 are operated in a fixed order. . FIG. 3 shows a state in which the bottom-sealed tube T ′ is made and filled with the article W to be packaged. The opening t of the bottom-sealed tube T ′ is clamped by the bag mouth sealing mechanism 5. -Resistant pad 5 protruding by the operation of the actuators 5a ', 5b'
The parts which are clamped by 0a 'and 50b' and which are fitted over the input hopper straight cylinder part 600 above it are clamped by pads 61a and 61b which are projected by the operation of the clamp actuators 6a and 6b. At this time, the film tube T in which the bag should be made in the next process
Along with the bottom seal cut, a blocking portion tb in which the films are in close contact with each other is formed immediately above the protrusion 22 of the core 2. Then, the lifting actuators 80a and 80b of the blocking release mechanism 8 are activated to operate the support 8
1a and 81b are lifted, the clamp actuators 82a and 82b are operated at that position, and the film tubes T are moved by the clamp pads 83a and 83b.
Pressed to zero.

From this state, next, as shown in FIG. 5, the bottom sealed tube T'filled with the article to be packaged W is removed from the loading / drawing mechanism 6 and the bag mouth seal is applied to form the package P. , Moved to the discharge position. On the other hand,
Below, the blocking portion tb is released and the tube opening t is formed. That is, first, the clamp actuators 6a and 6b of the closing / drawing mechanism 6 are moved backward to release the clamp of the bottom-sealed tube T ′ to the opening t, and at the same time, the operation of the lifting actuator 53 causes the sliding member 56 to move. Is lowered, so that the unit support 5c has a lower level than the loading / drawing mechanism 6, that is, the opening t has the loading hopper straight cylinder portion 600.
Is descended until it completely exits. At the moment when the descent is completed, the sealing actuators 5a and 5b operate toward the forward side, and the heat resistant pads 50a and 50b pinch the opening t,
A bag mouth seal is formed by the impulse heater 51.
This completes the package P. During or after the sealing, the rotation actuator 55 is actuated, whereby the unit support 5c having the sealing actuators 5a and 5b and the clamping actuators 5a 'and 5b' mounted thereon has the output shaft 560 as a fulcrum. The package P is rotated by 90 degrees, whereby the package P is moved to the discharge position while being suspended by the bag mouth sealing mechanism 5, and is discharged from the discharge shooter 101. During this time, the lowering and lowering actuators 80a and 80b of the blocking releasing mechanism 8 have begun to move downward, whereby the clamping pad 83 is provided.
Since the film tubes a and 83b descend while pressing the film tube T against the core disk 20, the film tube T is struck between the clamping pads 83a and 83b and the guide roller 30 as shown in FIG. The blocking part tb at the upper end is pulled to the left and right along with the scooping,
It gradually decreases. Lifting actuator 80
As a and 80b are still lowered, the upper ends of the film tubes are released from the close contact and separated from each other, and reach the position of the board portion 20 of the core 2 as shown in FIG. This creates the tube opening t. When the lifting actuators 80a and 80b of the blocking release mechanism 8 reach the lower limit in this way, the sliding body 62 is moved by the operation of the servo motor 63.
00, the support 6c including the input popper 60 starts to descend vertically.

When the support 6c is lowered, the throw-in popper straight cylinder portion 600 of the throw-in popper 60 is fitted onto the projection 22 of the core 2 as shown in FIGS. In this state, the lifting actuators 80a and 80b of the blocking release mechanism 8 operate. Thereby, the pads 83a and 83b for clamping
Moves upward while pressing the film tube T against the core disc portion 20, so that the countersunk portion formed up to that point is extended to the original length of the film tube T, whereby the tube opening t is inserted into the injection popper straight tube portion 600. Is fitted on. When this external fitting is confirmed, the clamp actuators 6a and 6b are actuated, whereby the tube opening portion t is firmly clamped to the throw-in popper straight tube portion 600 by the pads 61a and 61b. Then, with a slight delay, the clamping actuators 82a of the blocking release mechanism 8
82b separates from the film tube T. On the other hand, in the upper part, the unit support body 5c is rotated 90 degrees by the reverse operation of the rotation actuator 55 and returns to the original position.
In this state, the servo motor 63 is actuated next, and the slide body 62 rises accordingly. Therefore, the loading / drawing mechanism 6 rises by the bag-making pitch, and the film tube T moves to the tube opening t.
Is pulled out because it is clamped by the loading / drawing mechanism 6, and in the process, the film tube T is expanded by the expanded taper portion 21 of the core 2 and expanded in the thickness direction by the board portion 20 to become a tubular shape. The core 2 is held in a fixed position by its own weight and the guide rollers 30 and 31 contacting each other, and does not rise. When it is confirmed that the film tube T has risen by the bag-making pitch in this way, the bottom seal cut mechanism 4 operates to form a bottom seal. That is, when the translational actuators 4a and 4b are operated, the heat resistant pads 400a and 400b are moved to the core 2 as shown in FIG.
The film tube T is chucked at a position directly above the projecting portion 22, and the film is welded when the impulse heater 41 is energized to generate heat. At the same time, the blade driving actuator 43 operates to cut the cutting blade 4
Since 4 moves forward, the film tube T is cut immediately below the sealing position, and thus the tube T'having a bottom seal is obtained. Almost at the same time as the operation of the blade drive actuator 43, the clamping actuators 82a and 82b of the blocking releasing mechanism 8 are actuated, whereby the film tube portion of the board portion 20 of the core 2 is clamped.

Next, as shown in FIG. 10, the translational actuators 4a and 4b of the bottom seal cut mechanism 4 are moved backward, and the servo motor 63 is driven to drive the closing / drawing mechanism 6.
Re-elevates to the position where the packaged item is loaded. Along with that, the lifting actuators 80a, 80 of the blocking release mechanism 8
b starts to move backwards to form the next tube opening. When the loading / drawing mechanism 6 reaches the above-mentioned position, the folding loading plate 70 of the loading mechanism 7 is actuated, and the object receiving base 1b is received.
The object W to be packed placed above is filled into the tube T ′ with the bottom sealed through the input hopper 60, and after this filling, the actuator 5 for clamping of the bag mouth sealing mechanism 5
The a ′ and 5b ′ are activated to clamp the bottom sealed tube portion immediately below the closing / drawing mechanism 6. This state is shown in Fig. 3. By repeating the above operation, bag making and packaging are repeated under appropriate conditions that are not affected by the thickness of the film, the strength of the waist and static electricity, and do not cause opening errors at all. Done.

In the second embodiment, the actuator 8
If the holding levers 85a, 85b are tilted about the parallel shafts 84a, 84b when the actuators 7a, 87b are operated, the rubber rollers 86a, 86b come into contact with the board portion 20 of the core 2, and at the same time, the driving means 87 is driven. Gear 840
a and 840b rotate in the opposite direction, and the rotations are transmitted from the parallel shafts 84a and 84b to the rubber rollers 86a and 86b, so that the film tube T is struck as shown in FIG. 12, and the blocking immediately after the seal cutting is performed as described above. The condition is automatically removed. When the film tube T is fitted into the loading hopper straight cylinder portion 600 of the loading hopper 60, the driving means 87 may be operated in the reverse direction, and the film tube T is fed out. In the second embodiment, the guide roller 31 of the first embodiment can be omitted, and the first embodiment can be omitted.
In this case, one actuator that was necessary can be omitted, and the mechanism can be simplified.

[0015]

According to the present invention described above, in the packaging using the film tube, the blocking phenomenon due to the seal cut right above the core is surely released,
The excellent effect that smooth unmanned continuous packaging can be performed for a long time without any mistake in opening the mouth is obtained. Further, according to claim 3, an excellent effect that the blocking canceling mechanism can be simplified can be obtained. According to the fourth aspect, since the bag mouth sealing mechanism also serves as the discharging means of the package P, the process of changing the packaging P is not required, and an excellent effect that smooth continuous packaging can be performed is obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view schematically showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional front view of the same.

FIG. 3 is a vertical cross-sectional side view showing a state in which a bag with a bottom is formed and an object to be packaged is filled in the bag according to the present invention.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a vertical cross-sectional side view showing a state in which the blocking phenomenon is being canceled in the present invention.

FIG. 6 is a vertical cross-sectional side view showing a state where the blocking phenomenon has been released in the present invention.

FIG. 7 is a vertical cross-sectional side view showing a stage of connecting a tube feeding portion and a tube opening portion for bag making.

FIG. 8 is a vertical cross-sectional side view showing a state where the tube is fed out by a bag-making pitch.

FIG. 9 is a vertical sectional side view showing a bottom sealed state.

FIG. 10 is a vertical cross-sectional side view showing a state in which production of an outer bag is completed after bottom sealing and cutting are completed.

11 is a partial front view showing the state of FIG. 7. FIG.

FIG. 12 is a vertical sectional side view showing a second embodiment of the present invention.

FIG. 13 is a front view of the same.

[Explanation of symbols]

 1 Main Frame 2 Core 4 Bottom Seal Cut Mechanism 4a, 4b Actuator 5 Bag Opening Seal Mechanism 5a, 5a, '5b, 5b' Actuator 5c Unit Support 6 Loading / Withdrawing Mechanism 8 Blocking Release Mechanism 20 Board 21 Tapered 22 Projection 41, 51 Heater 44 Cutting blade 60 Input hopper T Tube film T'Bottom sealed tube film t Tube opening tb Blocking part

Claims (4)

(57) [Claims] 1. A retractable bottom seal cut mechanism 4 having a heat sealer 41 and a cutting blade 44 is provided above the core 2 held at a fixed position on the moving path of the tube film T.
A heat sealer 51 is provided above the bottom seal cut mechanism 4.
And a clamper 50a 'that clamps the position directly below the seal position,
50b 'and upper and lower bag mouth seal mechanism 5 that can freely move back and forth
In the vicinity of the bag mouth sealing mechanism 5, there are provided a loading hopper 60 for the articles to be packaged and tube opening clampers 61a, 61b for contacting with and separating from the outer surface of the loading hopper lower straight cylinder portion. A loading / withdrawing mechanism 6 that can be raised and lowered to a level near the bag mouth sealing mechanism is provided, and a loading mechanism 7 for feeding an article to be packaged through a loading hopper 60 is provided above the loading / withdrawing mechanism 6, and the bottom seal cutting mechanism is provided. After the seal cut, the film tube T is contacted with the outer surface of the core 2 and the film tube T is forcibly sunk downward to release the film portion directly above the core to form the tube opening t, and then the tube opening t. t input hopper straight cylinder part 60
A packaging apparatus using a tube film, which is provided with a blocking releasing mechanism 8 for appropriately feeding the film tube upward so as to be fitted to 0. 2. A pair of clampers 81, 81b provided with a blocking pad 8a for clamping, and actuators 81a, 81b for moving the pads toward and away from the outer surface of the core 2, and the clampers appropriately. The packaging device using the tube film according to claim 1, further comprising actuators 80a and 80b for moving up and down. 3. A pair of rollers 86a, 86b whose blocking releasing mechanism 8 is rotatable in forward and reverse directions, and actuators 87a, 87 for moving these rollers toward and away from the outer surface of the core.
The packaging device using the tube film according to claim 1, further comprising b. 4. The packaging apparatus using a tube film according to claim 1, wherein the bag mouth sealing mechanism 5 is configured to be rotatable at least 90 degrees around a vertical axis.