JP2005313988A - Trimming device for bag making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the efficient collection and disposal of trimmed wastes without making them bulky. <P>SOLUTION: A trimming cutter 12 is installed downward of the hem sealer of a bag making machine so as to remove the two-end butted hem portion at where both the ends of a film are joined. A conveyance tube 13 is provided downward of the trimming cutter 12 for conveying trimmed wastes. An air jetting nozzle 29 is connected to the conveyance tube 13, through which air is blown out, to convey the trimmed wastes. A parting cutter 14 is installed at the other end of the conveyance tube and provided with a sandwiching member that sandwiches the trimmed wastes between itself and a receiving member, and with a cutting blade that makes ingression into the receiving channel of the receiving member and parts the sandwiched trimmed wastes. The parted trimmed wastes are recovered into a collection box. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention forms a film and forms various bags such as gusseted gusset bags, preferably filled with various products such as powder and granules in the bag making process and sealed. The present invention relates to a trimming apparatus in which excess trimming waste is removed from a film and discharged in a bag making process of a bag making machine.

In general, there are those described in Patent Documents 1 and 2, for example, as bag making and filling devices. In the bag making and filling apparatus described in Patent Document 1, when making a gusset bag with a hem, the two ends of the two films attached to the back seal part are displaced, so that it does not look good. A part of the outer side of the seal part is cut (trimmed) to separate trimming waste including deviations at both ends. The trimming waste generated continuously is sucked and collected by the suction cylinder.
Also in Patent Document 2, there is provided a trimming device that cuts an ear portion that becomes trimming waste in a vertical seal portion of a packaging bag with a trimming blade. It is assumed that the trimming waste is also sucked from the suction port of the suction mechanism in a continuous state.
JP 2001-206307 A JP 2001-240008 A

  However, in the trimming apparatus described in Patent Documents 1 and 2, since the trimming waste cut and separated from the film or bag is continuously collected and sucked and collected by the suction mechanism, the rigidity of the film cut into a strip shape is reduced. Therefore, it was bulky and the recovery efficiency was very bad. Therefore, operations such as frequently changing the collection box or reducing the bulk by crushing trimming waste accumulated inside are necessary, which is complicated and expensive. Moreover, when transporting and collecting trimming debris with a suction cylinder, etc., the suction mechanism must be used, so the suction force must be exerted at all times. There was also a drawback.

  In view of such a situation, an object of the present invention is to provide a trimming apparatus for a bag making machine that can efficiently collect and discard trimming waste without bulking it.

A trimming device for a bag making machine according to the present invention is a trimming device for a bag making machine that divides trimming waste from a film and discharges it in synchronism with the feeding of the film when the film is made, A trimming cutter that is divided and continuously generated, and a cutting cutter that divides the trimming waste every predetermined length are provided.
Trimming waste is generated by cutting the film from the film with a trimming cutter, and the trimming waste can be received, collected, and discarded without being bulky by dividing the continuous trimming waste every predetermined length with the cutting cutter.

In addition, the cutting cutter may include a clamping member and a receiving member that clamp trimming waste, and a cutting blade, and the cutting blade that is sandwiched between the clamping member and the receiving member may be cut by the cutting blade. .
The trimming waste is sandwiched between the clamping member and the receiving member, and the receiving member can be held with the receiving groove sandwiched between both sides of the trimming scrap conveying direction with the clamping member, and the cutting blade advances to the receiving groove. By doing so, it is possible to cut the middle of the sandwiched trimming waste.
Further, a transport pipe for transporting trimming waste may be provided between the trimming cutter and the cutting cutter, and an air blowing section for discharging air in the transport direction of the trimming waste may be connected in the transport pipe.
If air is blown out in the feeding direction of the trimming waste when transporting the trimming waste, efficient transport can be performed without waste.
Further, it is preferable that a retention portion for retaining trimming waste is provided between the trimming cutter and the cutting cutter.
When continuously feeding trimming scraps, the trimming scraps are cut intermittently by the cutter, so the trimming scraps that are transported are bent and easily clogged. Therefore, it is possible to prevent clogging of trimming waste. The staying part is preferably provided in the transport pipe, but may be provided separately.

  According to the present invention, since trimming waste can be divided into predetermined lengths, when trimming waste is accommodated, it can be efficiently collected and discarded without being bulky.

Hereinafter, a bag making and filling apparatus 1 with a hem and a trimming apparatus according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1A is a diagram showing a configuration of a main part of a bag making and filling apparatus, FIG. 2 is a side view of a trimming apparatus provided in the bag making and filling apparatus, FIG. 3 is a plan view showing a trimming mechanism of the trimming apparatus, and FIG. Similarly, FIG. 5 is a side view of the cutting cutter, FIG. 6 is a sectional view taken along the line AA of the cutting cutter, and FIGS. 7A and 7B are views showing a cutting process of the cutting cutter.
A bag making and filling apparatus 1 (bag making machine) shown in FIG. 1 includes, for example, a rectangular tube making tube 2 (hereinafter simply referred to as a bag making tube) having a substantially quadrangular cross section. Near the upper part, a square tube bag making guide 3 (hereinafter simply referred to as a bag making guide) is attached. Between the outer peripheral surface of the bag-making tube 2 and the inner peripheral surface of the bag-making guide 3, a space having a substantially rectangular shape in plan view through which the film passes is provided.
Therefore, the film f fed out from a film roll (not shown) for winding the sheet-like film is folded by the bag making guide 3 and passes through the space between the bag making tube 2 and the bag making tube 2. It is folded into a substantially rectangular tube shape along the outer peripheral surface and sent downward.

In the bag making tube 2, a hem manufacturing unit 6 including a hem forming mechanism 4 and a hem sealer 5 is provided below the bag making guide 3. In the lower part, along the outer peripheral surface of the bag-making tube 2, the film f formed in a substantially rectangular tube shape is pressed against a pair of opposite side surfaces of the bag-making tube 2 to be intermittently fed downward and conveyed. The feeding belt 7 is provided.
Below the feeding belt 7, there is a gusset claw 8 for folding the lower end (and the upper end) of the film f formed in a rectangular tube shape below the lower end of the bag making tube 2 into a flat plate shape to form a gusset bag F. A horizontal sealer 9 that horizontally seals the upper and lower sides of the gusset bag F and a cutter 10 that horizontally cuts the middle of the lateral seal portion are provided.
In addition, the bag making and filling apparatus 1 shown in FIG. 1 conveys and fills the contents into the gusseted bag F whose bottom is laterally sealed through the bag making tube 2. When filling the granular material as the contents, the auger funnel tube is inserted to the lower end of the bag making tube 2.

Further, a trimming device 11 is provided between the hem manufacturing section 6 and the feeding belt 7 as shown in FIGS. 1 and 2 in the conveying direction of the film f by the bag making tube 2.
The trimming device 11 is provided with a trimming cutter 12 for cutting / separating irregular edges at the joints at both ends of the four hem portions of the film f as trimming waste t. In the vicinity of the trimming cutter 12, a transport pipe 13 for transporting the cut strip-shaped trimming waste t is provided, and a cutting cutter 14 for cutting the trimming waste t every predetermined length is provided at the other end. The trimming waste t divided by the cutting cutter 14 is accommodated in the collection box 100 and collected and discarded.

Next, in the hem manufacturing unit 6 shown in FIGS. 1 and 3, the hem forming mechanism 4 is provided below the bag making guide 3 in the bag making tube 2 having a square cross section, for example, a rectangular shape. Guide walls 15 and 16 for hem formation are formed on both sides of the extended lines of the long side plates 2a and 2a corresponding to the long sides facing each other in the cross section of the bag making tube 2, respectively. The film f formed in a substantially rectangular tube shape passes through the guide walls 15 and 16 to form hems h at the four corners. Each hem h is heated and sealed by the four hem sealers 5 located below the guide walls 15 and 16 after passing.
As shown in FIG. 3, one of the four hems h is a seam at both ends in the width direction of the film f. If this hem h is a double-ended hem H, the hem sealer 5 of the double-ended hem H is also a vertical sealer of the film f. As shown in FIG. 3, the both ends of the hem H are often not aligned at the both ends of the film f, so that it does not look good. Therefore, the trimming cutter 12 divides and removes to align the joints.
Inside each hem h, H is provided a support portion 17 that abuts the hem h, H, and in particular, a support portion 18 is provided on the both-end alignment hem H, and the support portion 18 is more than the other support portions 17. An extension 18b is formed by extending downward. A slit 18a for receiving the cutting edge 12a by the trimming cutter 12 is formed in the extension 18b in the vertical direction.

Next, the trimming mechanism 20 including the trimming cutter 12 will be described with reference to FIGS.
The trimming cutter 12 of the trimming mechanism 20 has a cutting edge 12a fixed to the shaft portion 21a of the motor 21, and a part of the cutting edge 12a can enter into the slit 18a of the support portion 18 via both end alignment hems H. Then, the cutting blade 12a is rotated by driving the motor 21, and the trimming waste t of the hem H aligned at both ends is divided.
The motor 21 of the trimming cutter 12 is fixed to the block 23 via an angle 22. The block 23 is screwed with a male screw portion 25a of an adjustment handle 25 that is rotatably supported by a stay 24 that is installed and held. The male screw portion 26a of the fixed handle 26 is screwed and fixed to the block 23 through a long hole 24a drilled in the stay 24 in the horizontal direction.

Since the size of the bag-making tube 2 and the position of the both-end alignment hem H differ depending on the size of the gusset bag F to be bag-made, the position of the trimming cutter 12 is adjusted accordingly. For that purpose, when the adjustment handle 25 is rotated by loosening the fixed handle 26 so that the inside of the elongated hole 24 a can move horizontally with respect to the stay 24, the block 23 and the trimming cutter 12 are integrated horizontally with respect to the stay 24. Since it moves, the cutting edge 12a can be moved horizontally to adjust the position. The horizontal movement of the block 23 and the trimming cutter 12 is guided by the fixed handle 26 moving integrally within the long hole 24a. After the adjustment, the fixing handle 26 may be tightened to fix the block 23 and the trimming cutter 12 to the stay 24.
Next, in FIG. 2, below the trimming cutter 12, an upper end opening 13 a of a transport pipe 13 for guiding and transporting the trimming waste t is provided. An air blowing nozzle 29 is connected to the transport pipe 13 at an appropriate position, and this nozzle 29 is connected to an air supply source (not shown). Then, the trimming waste t is transported by blowing air into the transport pipe 13 in the feeding direction of the trimming waste t.

Next, the cutting cutter 14 provided in the vicinity of the other end of the transport pipe 13 will be described with reference to FIGS.
The cutting cutter 14 includes a holder 32 formed with a passage hole 32a for allowing the trimming waste t to pass therethrough, and a guide 31 connected to the other end of the transport pipe 13 is provided in the passage hole 32a. A cylinder 33 is connected to the holder 32, and a plate-like base 34 and a block 35 are connected to the output shaft of the cylinder 33, and a cutting blade 36 having a substantially T shape in plan view is fixed to the block 35. ing.
Further, bushes 37, 37 are connected to both sides of the base portion 34, and a shaft portion 38 is inserted into each bush 37 so as to be able to advance and retract. A male screw portion 38 a provided at the tip of the shaft portion 38 is screwed into the holding member 40. The sandwiching member 40 is formed with a slit groove 40a extending in the horizontal direction at an intermediate portion, and a cutting blade 36 is accommodated in the slit groove 40a. A coiled spring 41 is interposed as an elastic member between the bush 37 and the sandwiching member 40 on the outer periphery of each shaft portion 38.

A receiving member 42 is fixed to the holder 32 at a position facing the front end surface 40 b of the clamping member 40. In the receiving member 42, a slit-like receiving groove 43 capable of receiving the cutting blade 36 is formed on the receiving surface 42 a facing the front end surface 40 b of the holding member 40.
Therefore, when the clamping member 40 and the receiving member 42 are separated from each other, the clamping blade 40 is pressed forward by the springs 41 and 41, so that the cutting blade 36 is retracted into the slit groove 40a. The trimming waste t entering from the guide 31 is located in the gap 44 between the tip surface 40b and the receiving surface 42a. At the time of cutting, the base portion 34 and the block 35 are pushed by driving the cylinder 33 to contact the front end surface 40b of the clamping member 40 with the receiving surface 42a of the member 42 via the springs 41 and 41, and then the spring 41 , 41 is compressed, the cutting blade 36 protrudes from the tip surface 40b and enters the receiving groove 43, and the trimming waste t is cut.

The trimming device 11 of the bag making and filling device 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described next.
In FIG. 1, the bag making tube 2, the bag making guide 3, and the guide walls 15 and 16 are appropriately set according to the size of the gusset bag F to be manufactured. And the continuous strip | belt-shaped film f drawn | fed out from the film roll which is not shown in figure is shape | molded by the bag making guide 3 provided in the upper part of the bag making tube 2, and is shape | molded by the substantially square tube shape through the gap | interval with the bag making tube 2, It is further intermittently conveyed downward along the bag-making tube 2 by the feeding belt 7. And since each guide wall 15, 15, 16, 16 of a pair of long side board 2a, 2a of the bag making tube 2 protrudes on the same plane, the film f shape | molded by the substantially rectangular tube shape is each guide wall 15 , 16 is widened in the direction of the long side surfaces 2a, 2a.
In the hem forming mechanism 4, the rectangular tube-shaped film f passes through the guide walls 15 and 16 to form the hem h and the end-to-end hem H at the four corners, respectively. Next, the rectangular tubular film f is sent below the hem forming mechanism 4 and each hem h and both-end hem H are heat-sealed by each hem sealer 5.

Here, the both-end alignment hem H is configured by heat-sealing seams at both ends of the film f. Since both ends are often laterally offset and sealed, both ends are trimmed with the trimming cutter 12. Align both ends. Therefore, when the square tube-shaped film f reaches a position where it contacts the support portions 17 and 18 located on the lower side of the hem sealer 5, the trimming cutter 12 of the trimming mechanism 20 is rotated by the drive of the motor 21, so that the cutting edge 12a. Is cut into the hem H at both ends and enters the slit 18a in the extension 18b of the support portion 18, and both ends of the shifted hem H are cut out as trimming waste t (see FIGS. 3 and 4).
The rotation speed of the trimming cutter 12 is set to be the same as or faster than the feeding speed of the film f. For example, when the film f is fed out intermittently, the cutting by the rotation of the trimming cutter 12 is started in synchronization with the start of the feeding of the film f, or is started at a slightly earlier timing.
The rectangular tube-shaped film f from which the trimming waste t has been divided is further fed by the feeding belt 7, folded inward by the gusset claw 8, then laterally sealed by the horizontal sealer 9, and divided by the cutter 10. The gusset bag F whose bottom is horizontally sealed is filled with the contents passing through the bag-making tube 2 from the opening, and then the opening is further sealed by the horizontal sealer 9 and divided by the cutter 10.

On the other hand, the trimming waste t separated from the both-end alignment hem H by the trimming cutter 12 is guided into the transport pipe 13 through the opening 13a as shown in FIG. In the conveying pipe 13, the trimming waste t is conveyed to the cutting cutter 14 by the air blown from the blowing nozzle 29 at predetermined time intervals.
In the cutting cutter 14 shown in FIGS. 5 and 6, the cylinder 33 is operated at a predetermined time interval with respect to the trimming waste t fed through the guide 31 into the gap 44 between the clamping member 40 and the receiving member 42, and the output shaft To protrude. Then, the cutting blade 36 moves in the direction of the receiving member 42 through the base 34 and the block 35. Since the bushes 37 on both sides are also pushed in the same direction integrally with this, the holding member 40 also moves in conjunction with the springs 41, 41. In this state, the cutting blade 36 is located in the slit 40 a of the clamping member 40.
Then, when the front end surface 40b is pressed against the receiving surface 42a with the trimming waste t interposed therebetween, the trimming waste t is sandwiched between both surfaces 40b and 42a (see FIG. 7A). Thereafter, when the base 34 is further pushed by the cylinder 33, the springs 41 and 41 are compressed to release the load, but the cutting blade 36 is further pushed into the receiving groove 43 of the receiving member 42 to remove the trimming waste t. Divide (see FIG. 7B). At this time, since the trimming waste t is sandwiched between the receiving surface 42a and the front end surface 40b in a tension state by sandwiching the receiving groove 43 and the slit groove 40a, the intermediate portion is reliably cut by the cutting blade 36. it can.
Since the trimming waste t after the division is located in the gap 44, it is reliably maintained in the gap 44 during the subsequent conveyance. The divided trimming waste T is stacked in the collection box 100 and stored. In this case, since the trimming waste T is divided into an appropriate length and stacked, the trimming waste T is not bulky like the conventional continuous trimming waste shown in FIG. (See FIG. 1).

The bag making and filling apparatus 1 according to the present embodiment includes an intermittent conveyance type bag making mechanism that stops the conveyance of the film f on the bag making tube 2 during heat sealing by the hem sealer 5 or the horizontal sealer 9. For this reason, the conveyance of the trimming waste t by intermittent air blowing from the air blowing nozzle 29 is performed in synchronization with the conveyance of the film f, and no air is blown during the heat sealing. Further, it is assumed that the trimming waste t is divided by the cutting cutter 14 in synchronization with the time when the conveyance of the film f is stopped, that is, when the generation of the trimming waste t by the trimming cutter 12 is interrupted.
Conversely, in the present embodiment, the trimming waste t is divided in units of the film length for manufacturing one gusset bag F.

  As described above, according to the present embodiment, continuous strip-shaped trimming waste t generated by the trimming cutter 12 can be cut at predetermined intervals by the cutting cutter 14, so that the trimming waste t is collected when collecting in the collection box 100. A large number can be efficiently accommodated without being bulky. Further, since the trimming waste t can be transported by blowing air from the air blowing nozzle 29, it is not necessary to always perform the suction function as in the conventional suction means, and the trimming waste t can be transported efficiently.

The bag making and filling apparatus 1 according to the above-described embodiment is a system in which the film f is intermittently conveyed and the hem seal and the lateral seal are performed in a stopped state of the film, but the hem seal and the lateral seal are continuously conveyed while the film f is continuously conveyed. A method of performing sealing may be used.
Although the bag making and filling apparatus 50 using this method will be described with reference to FIGS. 9 and 10, the same or similar parts and members as those of the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.
In the bag making and filling apparatus 50, each hem sealer 5 is heat-sealed while sandwiching the hem h or both-end aligned hem H. At that time, the film f is conveyed by the feeding belt 7 so that each hem sealer 5 is in a stationary state. The heat sealing is performed while sliding the h or both-end alignment hem H.
On the other hand, the gusset claw 8, the lateral sealer 9 and the cutter 10 are box-fed along the feeding direction of the film f, while the gusset claw 8 is inserted into the rectangular tube-shaped film f, The opening and bottom seals, and the horizontal seal portion are cut by the cutter 10. Therefore, the gusset claw 8, the horizontal sealer 9 and the cutter 10 are lowered in synchronism with the film f at the time of heat sealing, and are separated from the gusset bag F when the cutting of the horizontal seal portion of the gusset bag F by the cutter 10 is finished. Then, a box-like circulation cycle (shown by a one-dot chain line) of returning to the upper initial position is repeated.

The trimming device 51 of such a bag making and filling device 50 has the following configuration. In FIG. 10, the upper end opening 13a of the transport pipe 13 positioned below the trimming waste t cut by the trimming cutter 12 is provided with a staying portion 52 that expands to the side of the transport pipe 13, for example, downward.
When trimming waste t is generated by the trimming cutter 12 and continuously supplied into the transport pipe 13, the trimming waste t does not stay in the staying portion 52. At the time of intermittent cutting by the cutting cutter 14, the trimming waste t is held between the holding member 40 and the receiving member 42 of the cutting cutter 14 and is cut by the cutting blade 36. Is bent at the supply portion to the upper end opening 13 a and temporarily accommodated in the staying portion 52.
Then, when the clamping portion 40 is returned by the cylinder 33 after the trimming waste t is cut and a gap 44 is formed between the trimming waste t and the receiving portion 42, air is discharged from the air blowing nozzle 29, and temporarily enters the staying portion 52. The trimming waste t in the portion accommodated in the transport pipe 13 is sent out into the transport pipe 13 and the trimming waste t in the transport pipe 13 is transported to the cutting cutter 14.
In this way, it is possible to prevent the trimming waste t from being continuously supplied into the conveying pipe 13 and being bent or clogged in the pipe when cutting by the cutting cutter 14.

  As described above, according to the second embodiment, even when the film f is continuously fed, the trimming waste t that is continuously separated and generated is bent or clogged in the transport pipe 13 when divided. The trimming waste t in the extended state can be neatly divided by the dividing cutter 14 without any problem.

Even when the film f is intermittently conveyed as described in the bag making and filling apparatus 1 according to the first embodiment, when the gusset bag F to be manufactured has a long size, the conveyance process of the film f once. The trimming waste t generated may be divided into a plurality of pieces by the cutting cutter 14 and collected. In this case, the conveying pipe 13 provided with the staying part 52 shown in FIG. Then, in the process of transporting the film f for manufacturing one gusset bag F, the trimming waste t generated by the trimming cutter 12 is clamped by the clamping member 40 and the receiving member 42 when the trimming cutter 14 divides the trimming scrap t into a plurality of pieces. Then, it bends in the vicinity of the upper end opening 13 a of the transport pipe 13 and is temporarily accommodated in the staying portion 52.
In the case of the bag making and filling apparatus 1 of the first embodiment, even when the film f is divided into trimming scraps T having a length corresponding to the feeding length of the film f at the time of intermittent conveyance of the film f, A retaining portion 52 for trimming waste t may be provided in preparation for a failure or the like.
Further, the trimming device used in the present invention is not limited to a bag-filling device with a hem such as a gusset bag, and can be employed in various bag-making machines.

It is a figure which shows the principal part structure of the bag making and filling apparatus with a hem provided with the trimming apparatus by embodiment of this invention. It is an enlarged view of the trimming apparatus in the bag making and filling apparatus shown in FIG. It is a principal part top view which shows the state which divides trimming waste with a trimming cutter from the both end alignment hem part of a square cylindrical film. FIG. 4 is a side view of FIG. 3. It is a side view of a parting cutter. FIG. 6 is a cross-sectional view of the cutting cutter shown in FIG. It is a figure which shows the cutting process of the trimming waste by a parting cutter, (a) is a clamping state, (b) is a figure which shows a cutting state. It is a figure of the collection box which accommodated the conventional trimming waste. It is a figure which shows the principal part structure of the bag making filling apparatus by 2nd embodiment. It is an enlarged view of the trimming apparatus in the bag making and filling apparatus shown in FIG.

Explanation of symbols

1 Bag making and filling equipment (bag making machine)
2 Bag making tube 11 Trimming device 12 Trimming cutter 12a Cutting blade 13 Conveying pipe 14 Dividing cutter 20 Trimming mechanism 36 Cutting blade 40 Holding member 42 Receiving member 52 Retaining part f Film F Gusset bag (bag)
t, T Trimming waste

Claims (4)

A trimming device of a bag making machine that divides trimming waste from a film and discharges it in synchronism with the feeding of the film when making the film,
A trimming cutter that continuously generates trimming waste from the film,
A trimming apparatus, comprising: a cutting cutter that divides the trimming waste every predetermined length.   The cutting cutter includes a clamping member and a receiving member for clamping trimming waste, and a cutting blade, and the cutting blade sandwiched between the clamping member and the receiving member is cut by a cutting blade. The trimming apparatus according to claim 1, characterized in that:   A transport pipe for transporting trimming waste is provided between the trimming cutter and the cutting cutter, and an air blowing section for discharging air in the transport direction of the trimming waste is connected to the transport pipe. The trimming apparatus according to claim 1 or 2. The trimming apparatus according to any one of claims 1 to 3, wherein a retaining portion for retaining trimming waste is provided between the trimming cutter and the cutting cutter.

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