JPH0339361Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cutting mechanism in a continuous packaging device for stick-like objects such as straws.

2. Description of the Related Art In the packaging of stick-like objects such as straws, a line is known in which two sheets of heat-sealable film are moved, and the stick-like objects such as straws are inserted between the two and continuously packaged at regular intervals.

By the way, when the rod-shaped objects such as straws that are continuously packaged in this way are shipped from the factory, they are required to be cut into various numbers depending on the purpose of use. That is, for example, if it is a commercial product used for packaging milk, etc., it would be desirable to have it separated one by one, and if it is a product for home use sold in stores etc. If so, you would probably want something that is organized into several pieces.

In order to meet such demands, this invention is equipped with a mechanism that can cut stick-like objects such as straws individually or into arbitrary numbers in a line that continuously packages stick-like objects.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

As shown in FIG. 1, a continuous package A of a stick-like object such as a straw has a width longer than that of a stick-like object 3 such as a straw, and is composed of two opposing heat-weldable films 1 and 2. The stick-like objects 3 are continuously wrapped one by one at regular intervals perpendicular to the longitudinal direction of the films 1 and 2, and connecting and dividing portions 5 are formed in each continuous portion 4 between adjacent stick-like objects 3. , a tearing part 6 for taking out the rod-like object is formed in the films 1 and 2 perpendicularly to the longitudinal direction of the rod-like object. In this embodiment, the films 1 and 2 are made of thermoplastic synthetic resin such as polyethylene or polypropylene, and the films 1 and 2 are thermally welded around each of the rod-shaped objects 3 for continuous packaging. Each continuous part 4, which is a welded part between rod-like objects 3 and 3, is easily separated and partially thermally welded to form a connecting section 5, while a fixed dimension is formed from each end of the rod-like object 3. An example is shown in which a tearing part 6 for taking out the rod-like object is continuously formed on the films 1 and 2 at an inner position and perpendicular to the longitudinal direction of the rod-like object 3.

Such continuous packages A are shown in Figures 2 to 4.
As shown in the figure, the product is manufactured by a continuous package manufacturing apparatus B comprising a continuous packaging section 7, a tearing section forming section 8, a connecting and dividing section forming section 9, and the like.

The continuous packaging section 7 includes a rotating main drum 10 that rotates in a counterclockwise direction when viewed from the front, a push-fitting body 11 and a relay rotating body 12 that are circumscribed from a lower position to an upper position of the rotating main drum 10, respectively. , a covering roller 13, a heat welding rotating body 14, and the like.

That is, first, the housing grooves 10a are formed parallel to each other at a constant pitch on the outer circumferential surface of the main rotating drum 10, and are formed to be able to accommodate the rod-like objects 3 one by one; Meshing protrusions 1 are provided on the outer peripheral surface to protrude at the same pitch as the housing groove 10a.
1a, the lower supply roll 1
The lower film 1 unrolled from 5 is successively pushed into the storage groove 10a, leaving both side edges intact.
Furthermore, an appropriate number of intake/outlet holes 10b (see Fig. 5) are provided for each housing groove 10a.
The film 1 pushed in as described above is placed in the storage groove 10.
a It is attracted to the entire inner surface and rotated while maintaining the attracted state. In addition, the intake/outlet hole 10b
The interior of the rotating main drum 10 is separated into an intake chamber 17 by three partition plates 16a, 16b, and 16c fixed to a support pipe 16 that pivotally supports the rotating main drum 10 so that the rotation is not hindered.
a. Air in the intake chamber 17a is divided into a blowout chamber 17b and an atmospheric pressure chamber 17c, and the air in the intake chamber 17a is sucked in through the intake hole 16d drilled in the support pipe 16 to create a negative gauge pressure, and the rotating main body passing through the intake chamber 17a is During this time, air is taken in through the air intake and blowout holes 10b formed in the drum 10. On the other hand, the inside of the blowout chamber 17b becomes a positive gauge pressure due to the air sent through the blowout hole 16e bored in the support pipe 16.
Air is blown out from 0b during this time. and,
When air is taken in through the air intake/blowout hole 10b, since the continuous wrapping part 7 and the tearing part forming part 8 are present, during this time, the film 1 rotates in an adsorbed state as described above.

Next, when the relay rotating body 12 is rotationally moved to the position of the relay rotating body 12 in this attracted state, a recess 12a is carved in the outer peripheral surface of the relay rotating body 12 at the same pitch as the housing groove 10a in the accommodation groove 10a in this attracted state. Moreover, the rod-shaped object 3 that has been suctioned and held in the recess 12a, which has an intake and blowout hole 12b, is blown out and stored. Incidentally, the rod-like objects 3 that have fallen from the hopper 18 in which a large number of rod-like objects 3 are stored reach the concave portion 12a of the rotating relay rotor 12, and the rod-like objects 3 fall from the pair of screw conveyors 1.
9, the rod-like objects 3 are fed one by one one by one, and the rod-like objects 3 are fed into the recess 12 by the intake/outlet hole 12b opposite thereto.
a, and is rotated and transferred to the storage groove 10a.
When it approaches, it is blown out through the hole 12b and is accommodated in the accommodation groove 10a as described above.
The suction and blowout holes 12b formed in the relay rotary body 12 hold the rod-like object 3 by suction during intake, and the blow-off of the rod-like object 3 during blow-out is also formed in substantially the same manner as inside the rotating main drum 10. The intake chamber 21 is separated by three partition plates 20a, 20b, 20c.
This is achieved by partitioning into a, blowout chamber 21b, and atmospheric pressure chamber 21c.

Next, in this way, the rod-shaped object 3 is placed in the accommodation groove 10a.
When the upper film 2 is rotated to the covering roller 13 position, the upper film 2 fed out from the upper supply roll 22 is transferred by the covering roller 13 to the lower film wound around the rotating main drum 10. 1 and the rod-shaped object 3 is wrapped with both films 1 and 2. Then, the accommodation groove 10a of the rotating main drum 10
When the heat welding rotating body 14 comes to the position where relief grooves 14a having the same pitch and substantially the same shape are formed on the outer circumferential surface, the rod-shaped objects 3 accommodated in the accommodation groove 10a are sequentially inserted into the relief groove. Relief groove 1 of the heat welding rotating body 14 that is rotated synchronously so as to be at the position 14a
Both the films 1 and 2 are thermally welded to the outer circumferential surface around the housing groove 10a of the rotating main drum 10 that closely opposes the outer circumferential surface of the outer circumferential surface of the rotary main drum 4a, thereby continuously packaging each rod-shaped object 3 one by one. will be done. Note that a large number of protrusions 14b of an appropriate size may be provided in an orderly manner on the outer circumferential surface of the heat welding rotating body 14 around the escape groove 14a, and only the portions with the protrusions may be heat welded (see FIG. 6). .

The tearing part forming part 8 has a rotary blade body 23, which has a blade part formed on the outer peripheral edge of a disc, circumscribed on the outer peripheral surface of the rotary main drum 10 so as to pass through the appropriate position of the accommodation groove 10a. This rotary blade body 23
The tearing portion 6 is formed by rolling the upper film 2, which has been continuously wrapped and rotated by the continuous wrapping portion 7, from the upper surface side. This tearing part 6 has a slight cut in the rolling part of the upper film 2 and each continuous part 4 which is a thermally welded part, and this part becomes weak and easily tears. Note that the rotary blade body 23 may have this blade portion cut out at appropriate intervals, and when this is used, the tearing portion 6 is formed at a perforation.

Similar to the rotating main drum 10, the connecting/dividing portion forming part 9 has an accommodation groove 24a and an air intake/outlet hole 24b formed therein, and furthermore, a V-shaped cross-section groove 24c is formed between the adjacent accommodation grooves 24a and 24a. Another rotating sub-drum 24 has V-shaped protrusions 25a on its outer circumferential surface that can be engaged with the V-shaped groove 24c, and is formed at the same pitch as the V-shaped groove 24c, and has teeth missing at an appropriate number of places halfway in the width direction. 25b and a thermal partial melt cutting rotating body 25. The connecting and dividing portion 5 is blown out from the air intake/blowing hole 10b of the rotating main drum 10, and at the same time is securely connected to the storage groove 1 by the separation plate 26a.
The continuous package A, which has been removed from 0a and has not yet been formed with the connecting and dividing portion 5, is transferred again to the rotating sub-drum 24, which is rotating counterclockwise, by the suction force of the air intake/blowing hole 24b and the guide 27. When installed in the same manner and rotated to the position of the thermal partial fusing rotary body 25, each continuous portion 4 is connected to the missing tooth 2 by the V protrusion 25a.
It is formed by thermal cutting, leaving only the portion 5b. Then, this rotating sub-drum 2 becomes a continuous package A.
4 by the same blowing force and separation plate 26b as used for removal from the rotating main drum 10 described above, and is sent onto the conveyor 28. Note that the rotating main drum 1 is also located inside the rotating sub-drum 24.
0 interior, three partition plates 29a, 29b,
29c, the intake chamber 30a and the blowout chamber 30
b. An atmospheric pressure chamber 30c is formed, and air is taken in and blown out through the air intake/blowout hole 24b.

By the way, the continuous packages A formed on one line of the continuous package manufacturing apparatus B are further processed by an individual cutting mechanism C disposed downstream of the connecting and dividing part forming part 9 in the middle of the same line. , and an arbitrary number of pieces cutting mechanism D, the former cuts the rod-shaped articles 3 individually at positions corresponding to the continuous packaging pitch, that is, the positions of each connecting and dividing portion 5, or the latter, Multiple pieces are cut at once at each position after a certain number of pitches.

The individual cutting mechanism C is capable of switching the roller 31, which has protrusions 31a on the outer periphery according to the packaging pitch of the bar-shaped object 3, between a retracted position away from the outer periphery of the rotating sub-drum 24 and an approach cutting position in which it circumscribes this outer periphery. Moreover, when this roller 31 is switched to the approach cutting position, the synchronous gear 38 disposed coaxially with this roller 31 also approaches, and the rotating auxiliary drum in the transmission path 34 drive gear 3
4a, and the protrusion 31a rotates while engaging with the V-shaped groove 24c of the rotating sub-drum 24.

The protrusion 31a is similar to the V protrusion 25a of the thermally partially fused rotating body 25 without the toothless portion 25b, and thereby completely cuts or thermally fusions each connecting and dividing portion 5 in the approach cutting position. It is possible to separate them individually. The distance switching operation of the roller 31 is performed by a fluid pressure cylinder 3 that can be expanded and contracted.
By switching 9 as desired,
This is accomplished by vertically moving the roller supporting member 40 fixed to the lower end of the piston rod 39a (see FIGS. 8 and 9). Further, the number of teeth of each of the driving gear 34a and the synchronous gear 38 is the same as that of the rotating sub-drum 24.
It is preferable that the number of housing grooves 24a and the number of protrusions 31a of roller 31 be the same.

The arbitrary number cutting mechanism D has a counting mechanism 41 that indirectly counts the number of sticks 3, and sends a current to a solenoid 42 in response to a command from the counting mechanism 41 to cut the knives 32, 32' by electromagnetic force. Make it stand out,
This is to cut each corresponding connection/disconnection portion 5 .
As shown in FIG. 8, the cutting according to this embodiment is performed by fixing the upper knife 32 to the upper part of the tip of the movable rod 43 which can be advanced by electromagnetic force, and attaching the lower knife 32' to the lower part integrally with the arm 44 when viewed from the front. When the tips of these two knives 32, 32', which are rotatably pivoted in a clockwise direction, advance and cut, as shown in FIG. The arm 44 is rotated clockwise via the link 47 by the actuating rod 46, which moves back and forth due to electromagnetic force, and the tip of the lower knife 32' is rotated downward. A configuration is shown in which the tip of the lower knife 32' that was in contact is separated and the connecting and dividing portion 5 is torn apart to securely divide it. After the separation, the current flowing through both solenoids 42 and 45 is cut off, and the movable rod 43 is retracted by the tension spring 48, and at the same time, the operating rod 46 is also moved forward by the return spring (not shown). In addition, the lower knife 32' is also returned by the return spring 49, returning to its original state and waiting for the next command.

The counting mechanism 41 is configured to count the number of teeth of the driving gear 34a using a non-contact relay 41a, and can send a command signal for each desired arbitrary setting. Also,
The mechanism 41 is operated by turning on the switch, so when the switch is turned off, the mechanism 41 does not operate, and the arbitrary number cutting mechanism D is not operated.

Therefore, the individual cutting mechanism C is set in the retracted position,
Since any number of cutting mechanisms D can be operated and vice versa, alternative use can be made as desired. However, both mechanisms C and D are in the retracted position,
It is also possible to set it to the inactive state and only perform continuous packaging.

Note that, like the roller 31, the thermal welding rotary body 14 circumscribing the rotating main drum 10 and the thermal partial fusing rotary body 25 circumscribing the rotating sub-drum 24 may be configured to be able to be switched from perspective to the corresponding drum.
Furthermore, heaters are built into these rotating bodies 14, 25 and the roller 31 for thermal cutting. Furthermore, the rotation of the drums 10, 24, the rotating bodies 12, 14, 25, the rollers 31, and the screw conveyor 19 is controlled by the rotational power of the motor 33 being appropriately decelerated via a transmission line 34 such as a belt or gear. The drums 10, 24 and the relay rotating body 1
Intake chambers 17a and 3 formed inside each of the intake chambers 17a and 3
Air suction from 0a and 21a is done through suction pipe 17.
d, 30d, 21d, the blowing chambers 17b, 30
Air is supplied to b, 21b through supply pipes 17e,
30e and 21e, respectively.

In the figure, 35 is a fall prevention guide that prevents the rod-shaped object 3 from falling while being sucked and held by the relay rotating body 12 and being transferred, and 36 is a correction belt that corrects lifting of both edges of the lower film 1. , 37 are fall prevention guides that prevent the rod-shaped object 3 from falling from the accommodation groove 10a.

As is clear from the above description, according to this invention, since the line for continuously packaging the sticks 3 is equipped with the piece-cutting mechanism C and the cutting mechanism D according to an arbitrary number, it is possible to continuously package the sticks 3. It is possible to package and cut at the desired set position on the same line, compared to conventional methods that require continuous packaging on one line and then moving to another line for new setting and cutting. , work efficiency can be significantly improved. Furthermore, the continuous package A can be cut individually or in any number of pieces as desired, so that customer needs can be fully met.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of a continuous package of stick-like objects such as straws, Fig. 2 is a front view of a continuous package manufacturing device equipped with a cutting device according to this invention, and Fig. 3 is a schematic diagram of the same manufacturing device. FIG. 4 is an enlarged sectional view of the main parts of the manufacturing apparatus, FIG. 5 is an enlarged view of the main parts of the rotating main drum, FIG. 6 is an enlarged perspective view of the main parts of the heat-welding rotating body, and FIG. FIG. 8 is an enlarged front view of the cutting device according to the invention; FIG. 9 is an enlarged cross-sectional side view of the main portion of the cutting device;
FIG. 10 is a schematic front view showing the state of cutting by the same cutting device. Code, 1, 2...film, 3...rod-shaped object,,
31...Roller, 31a...Protrusion, 32, 32'
...Knife, 41...Counting mechanism, C...Individual cutting mechanism, D...Mechanism for cutting any number of pieces.

Claims (1)

[Scope of Claim for Utility Model Registration] A continuous packaging unit 7 that wraps stick-shaped objects 3 such as straws at appropriate intervals using two heat-fusible films 1 and 2 that are continuously fed, and this continuous packaging unit 7
The films 1 and 2 that have passed through this process are pressed by a drum 24 and a heat roller 25 having protrusions 25a chipped in some places in the width direction, so that portions corresponding to the protrusions 25a are formed on the films 1 and 2 between the rod-shaped objects 3 such as straws. Continuous dividing portion 5 that is fused and continues the remaining part
In a continuous packaging device for stick-like objects such as straws, which has a connecting and dividing part forming part 9 that forms a connecting part and part forming part 9, downstream of this connecting part and dividing part forming part 9, the drum 24 and the remaining continuous part of the connecting part and dividing part 5 are brought into contact with each other. An individual cutting mechanism C consisting of a heat roller 31 formed with a protrusion 31a for fusing the lever portion, and a preset number of rod-like objects 3 such as straws to be transferred downstream of this individual cutting mechanism C are set in advance. An arbitrary number cutting mechanism D consisting of knives 32, 32' that protrude and cut the remaining continuous portion of the connecting and dividing portion 5 when the number of pieces is reached is installed respectively, and the individual cutting mechanism C or the arbitrary number cutting mechanism D is selected. A cutting mechanism in a continuous packaging device for stick-like objects such as straws, which is operated automatically. Between the continuous wrapping part 7 and the connecting and dividing part forming part 9, a rotary blade 23 which is chipped in places in the circumferential direction is brought into contact with the films 1 and 2 to make intermittently cuts in the longitudinal direction in the films 1 and 2. Insert and tear part 6
A cutting mechanism in a continuous packaging apparatus for stick-like objects such as straws as set forth in claim 1 of the Utility Model Registration Claim, which is provided with a slit-forming part 8.