JP2005289477A - Rotary type bagging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure which enables the opening of packaging bags, each having gussets on both its sides, without degrading the rhythm interval of the intermittent rotation of a rotary packaging machine. <P>SOLUTION: A plurality of vacuum suction ports 26 are made in the front faces of the receiving seats 25 of clamps 20 which support each packaging bag 10 on a rotor between them. In a bag feed section located behind the section in which the packaging bag 10 is released from the clamps 20, the packaging bag 10 externally supplied and having the gussets 11 on both its sides is caught by the clamps 20 in a folded state. Thereafter, in an area apart from the bag feed section, opening/closing pawls 28 are temporarily opened while the packaging bag 10 held between the clamps 20 is sucked by the vacuum suction ports 26 of the receiving seats 25 of the clamps 20. The packaging bag 10 is opened with a vacuum bar 23 sucking to the front face of the packaging bag 10. In addition, while both the edges of the back of the packaging bag 10 is held between the opening/closing pawls 28 closed again, the packaging bag 10 is carried to the section where contents are packaged. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a packaging device suitable for opening a wrapping bag provided with folded folds, that is, gussets on both side surfaces.

  As shown in FIG. 10, this type of wrapping bag 10 has folds 11 called gussets on both side surfaces for the purpose of enlarging the opening area. And the packaging machine needs to open by sandwiching each side edge 12 with a clamp. However, the empty wrapping bag 10 before opening is flattened, and it is difficult to clamp the side edges 12 individually with clamps.

  In the prior art document 1, by using two vacuum suction cups 13 and 14 arranged in the wrapping bag supply section in the rotary track, the wrapping bag 10 to be supplied to the clamp is opened to widen the gusset interval, and the side edge 12 having no obstacle is removed. A technique for clamping by a clamp is disclosed.

In the above-mentioned document, two side edges are sandwiched by two clamps. However, since Document 2 discloses that each of four side edges is sandwiched by four clamps, these two documents have two clamps. It seems that it is easy to reach the technique of spreading the gusset 11 with the vacuum cups 13 and 14 and holding the four side edges 12 with clamps. However, the rotor in the rotary packaging device is a system that rotates intermittently at a constant time rhythm. As described above, in the bag supply section, the supply operation to the bag packing machine by the vacuum cup, the opening of the gusset, and the clamp There is a problem in that the system that performs gusset side edge clamping by means of time is over and the efficiency is lowered accordingly.
Japanese Utility Model Publication No. 55-23931 Japanese Utility Model Publication No. 55-90506

  The problem to be solved by the present invention is to improve the efficiency by opening the gusset and clamping the gusset side edge by clamping in the region after the bag supply section.

  Therefore, the present invention is to intermittently rotate a large number of clamps, each of which is a pair supported on the periphery of the rotor, together with the rotor, and in each stop section in the rotating track, the packaging bag supported by the pair of clamps. A packaging device that sequentially performs filling of an object to be packaged, sealing of the packaging bag, and release of the sealed packaging bag from the clamp, wherein the pair of clamps including a receiving seat and an opening / closing claw A vacuum suction port is formed on the front surface of the seat, and a vacuum bar that rotates in parallel with each pair of clamps is installed, and is supplied from the outside in the bag feeding section after the bag release section from the clamps. In addition, after the wrapping bag with gussets formed on both sides is folded over and clamped by the clamp, the front of the clamp is separated from the bag feeding section. The opening / closing claw is temporarily opened while adsorbing the holding bag with the vacuum suction port of the receiving seat, the opening bag is opened with a vacuum bar adsorbing to the front surface of the packing bag, and the opening / closing claw is re-opened. The wrapping bag is configured to be transported to the filling section of the article to be packaged while closing and sandwiching both rear edges of the wrapping bag.

  Each of the pair of clamps includes a seat having a vacuum suction port and an opening / closing claw, so that the bag supplied from outside at a constant time interval in the bag supply section is separated by the seat and the opening / closing claw. Hold it with the gusset and transport it to the rear area. Since the stacking of operations in the section will cause the conveyance interval of each clamp to be delayed by that amount, the clamps are quickly separated.

  The clamp with the bag feeding section separated as described above adsorbs the wrapping bag by the vacuum suction force acting on the vacuum suction port of the seat that constitutes the wrapping section. The front side of the wrapping bag is adsorbed by a vacuum bar that moves together with the clamp to open the wrapping bag, while the opening and closing bar re-nips both side edges of the back surface of the wrapping bag. The packaging bag can be opened by supporting the back surface of the packaging bag with a pair of clamps and the front surface with a vacuum bar. In other words, the operation of opening the opening and closing claws that sandwiched the gusset of the wrapping bag and re-holding the both side edges of the back of the wrapping bag is referred to as “bag change”. It is possible to carry out the bag change even while moving on the rotor circular orbit, and this bag change operation can be performed in the bag supply section. It is possible to carry out the separation, and the thus opened sachet is transported to the back-filled article filling section.

  As shown in FIG. 2, the circular rotor 15 of the bagging and packaging machine is provided with eight sections 1 to 8 at equal intervals around the rotor 15, and the rotor 15 has a predetermined interval as shown in FIG. A pair of clamps 20 to be maintained and a vacuum suction bar 23 supported by a sleeve 21 via a slidable spindle 22 are arranged in parallel.

  As shown in FIG. 4, when one side of the pair of symmetrical clamps is enlarged, the clamp has a receiving seat 25 having a large number of vacuum suction holes 26 on the front surface and a pin 27 as a fulcrum. The tension of the coil spring 30 which is composed of a rotating opening / closing claw 28 and is installed in a support rod 29 supported by the rotor normally urges the opening / closing claw 28 so as to be in close contact with the seat 25. A force against the tension of 30 is applied to the opening / closing claw 28 via the connecting rod 31 and the link 32 (acting against the pin 100 in FIG. 8), thereby pulling the opening / closing claw 28 away from the seat 25. Force acts in the direction.

  The bag feeding mechanism installed opposite to the bag feeding section 1 in FIG. 2 is shown in FIG. That is, the bag feeding mechanism is configured to dispose the packaging bag 10 made of a belt conveyor in a position opposed to the pair of clamps 20 to be stopped and the packaging bag 10 that is held in position by colliding with the stopper 39. 36 and a sliding plate 38 that inclines and waits for the means for delivering the second vacuum cup 40 to the second vacuum cup 40 and the packaging 10 adsorbed by the second vacuum cup 40 by the rotation of the fluid piston 37 with the pin 41 as an axis. The means for dropping the rod plate 42 to the contact position of the saddle type stopper 42 and the movement transmission for raising the sliding plate 38 to the contact position with the clamp 20 as shown by the imaginary line 38a so as to coincide with the reaching cycle of the clamp 20 moving intermittently. When the wrapping bag 10a is fed into the clamp 20 as shown by an imaginary line, each opening of the pair of clamps 20 is opened as shown in FIG. Pawl 28 on both sides gusset 11 of the packaging bag 10 is clamped, is to start conveying directed to FIG. 2 Oite the wrapper to Fukuroji replacement section 2.

  As shown in FIG. 1, a plurality of vacuum ports 26 formed on the front surfaces of a pair of receiving seats 25 on both sides are connected to a vacuum pump as a vacuum source via a first vacuum line 45 and act on the vacuum ports 26. The opening / closing claw 28 can be opened by adsorbing the wrapping bag 10 by a suction force, while the front surface of the wrapping bag 10 is adsorbed and separated by the vacuum bar 23 and then reopened. Re-clamp the back side edges of the bag. Such an operation is performed from the region before and after the bag changing section 2 in FIG. 2 to the region before and after the opening section 3. In other words, the continuation of the operation as described above during the movement has the advantage that the intermittent rotation rhythm of the rotor 15 is not lowered.

  The details of the mechanism for moving the vacuum bar 23 back and forth is as follows. As shown in FIG. 7, the sleeve 21 supporting the vacuum bar 23 is fixed to the lower surface of the rotor 15, while the rotor 15 is swingable via a pin 51. A bell crank 52 to be supported is engaged with a thin pin 50 provided at the end of the spindle 22, and a lever 54 is pivotally supported on a bracket 53 depending from the rotor 15, and the lever 54 and the bell crank 52 are connected to each other. The connecting rod 55 is used for connection. Normally, the spring 56 pulls the vacuum bar 23 in the direction of the arrow 57, but when the load of the annular cam acts on the pulley 58 by the rotation of the rotor 15, the load pushes the vacuum bar 23 forward, as already described. Open the bag.

  As shown in FIG. 8, the rotor 15 is fixed to the upper end of a cylindrical main shaft 61 supported by a bearing 60 via an annular seat 63, and is integrated with the main shaft 61 within a range of 45 degrees by inputting from a lower gear 62. It rotates intermittently. A mandrel 64 disposed in the hollow center of the cylindrical main shaft 61 and having a lower end fixed to the machine base has a circular valve plate 65 fixed to the upper end thereof, while a rotary valve 66 fixed to the annular seat 63 is connected to the circular valve. In the structure of sliding on the lower surface of the plate 65, the lower end of the passage 67 drilled in the center of the mandrel 64 is connected to the vacuum pump already described, and the upper end of the passage 67 is connected to the rotary valve 66 and the flexible tube 68, 69 and 70 communicates with the plurality of vacuum ports 26 of the receiving seat 25 already described in the clamp 20 at the periphery of the rotor, and the same rotary valve 66 controls the timing of vacuum suction in the vacuum bar 23 in FIG. It also controls.

  In the filling section 4 in FIG. 2, the package is filled in the opened sachet, and if this wrapping is a food product, the seasoning liquid is filled in the sachet in the rear liquid filling section 5. Since the opening edge of the wrapping bag is heated and sealed in the bag mouth sealing section 6 at the rear position and the sealing heat of the wrapping bag is cooled and removed in the cooling section 7, the package body is excluded from the machine in the release section 8. is there.

  In the case of heat-sealing the opening edge of the bag in the bag-sealing section, it is necessary to draw the vacuum bar 23 in the direction of the clamp 20 and fold the gussets on both sides of the bag 10 in advance in FIG. In this case, the clamp 20 and the vacuum bar 23 support the lower region slightly from the upper edge of the wrapping bag 10, so that it does not hinder the sandwiching action of the upper wrapping bag by the seal bar, but before the sealing, the upper edge of the wrapping bag Is desired to be tensioned in both directions, and such tension is implemented by the following arrangement.

  In other words, the two support rods 29 each having the clamp 20 are slidably supported on the guide rod 72 installed on the lower surface of the rotor 15 via the bracket 73, while the bell crank 78 supported on the rotor 15 by the pin 74. Both ends and the support rods 29 are connected by a pair of connecting rods 79. The movement of the lever 76 that moves along the upper surface wave of the annular cam 75 around the main shaft 61 of the rotor is supported by the clamps 20 on both sides as a result of being transmitted to the bell crank 78 through the rod 77. The package 10 is tense.

  In FIG. 8, a spiral groove 81 is formed in a cylindrical base body 80 arranged around the bearing 60, and this spiral groove 81 is engaged with a pin 82 fixed to the bearing 60. The cylinder base 80 is moved up and down by a spiral motion by rotating the crank 84 connected to the cylinder base 80 via the rod 83 with a shaft 86 having a pinion 85 at the lower end. Since the cylindrical base body 80 supports the annular cam 75 already described with reference to FIG. 3 through a hole bearing around the cylindrical base body 80, the opening edge of the wrapping bag 10 can be tensioned by swinging the lever 76 when the rotor 15 is stopped. Is possible. Note that immediately before the sealing, the opening / closing claw 28 can be temporarily opened to re-hold the gusset of the wrapping bag 10.

  The horizontal middle stage of FIG. 9 explains the work contents of each of the rotor 8 sections already described, and the upper and lower two stages explain the vacuum suction area by the clamp and the vacuum bar, that is, the opening bar. Vacuum suction is performed at a minimum between the bag feeding section and the opening section, while vacuum suction at the opening bar is performed at a minimum between the bag change section and the bag sealing section.

  This apparatus can be used in combination with a package using a flat bag without a gusset, in addition to the packaging of an article to be packaged with a sachet already formed with a gusset. In other words, the side edge of the wrapping bag is maintained in the state of being attracted to the receiving seat while the clamp opening / closing claw is temporarily opened and then reclosed, so that it can be used together with the flat bag.

Top view showing the open state of the sachet Plan view showing work sharing of rotor in rotary bag filling and packaging machine Description plan view of clamp and vacuum bar in part of rotor Enlarged view of the clamp Side view of bag feeding mechanism Explanatory drawing of the sachet in the grip state with clamp Structure diagram of vacuum bar Cross section of rotor Illustration of work Explanatory drawing of opening of bag

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Packaging bag 11 ... Gazette 20 ... Clamp 15 ... Rotor 23 ... Vacuum bar 25 ... Receiving seat 26 ... Vacuum port 28 ... Opening / closing claw 66-Rotary valve

Claims (2)

  A large number of pairs of clamps supported on the periphery of the rotor as a set are intermittently rotated together with the rotor, and the packing material supported by the pair of clamps is filled in the stopping sections in the rotating track. And a sealing device for sequentially sealing the wrapping bag and releasing the sealed wrapping bag from the clamp, wherein the pair of clamps comprising a seat and an opening / closing claw are vacuumed on the front surface of the seat A vacuum bar that forms a suction port and rotates in parallel with each of the pair of clamps is installed, and is supplied from the outside and on both sides of the bag feeding section after the bag release section from the clamps. After the gusset-formed wrapping bag is folded over and clamped by the clamp, a vacuum is applied to the receiving seat in the clamp in a region away from the bag supply section. The opening and closing claw is temporarily opened while adsorbing the holding bag held by the pulling port, and the opening and closing claw is opened by a vacuum bar adsorbing to the front surface of the packing bag, and the opening and closing claw is re-closed to An apparatus for transporting the wrapped bag to the filling section of the packaged object while sandwiching both rear edges of the wrapped bag. The apparatus according to claim 1, wherein the rotary valve installed at the center of the rotor applies a vacuum suction force to each of the receiving seat in each clamp and a vacuum bar installed in parallel with the clamp.