JP5700333B2 - End seal device for bag making filling and packaging machine - Google Patents

Description

  The present invention relates to an end seal device of a bag making filling and packaging machine.

  The bag making filling and packaging machine sequentially delivers and supplies articles at a predetermined interval by a supply conveyor into a cylindrical film which is formed into a cylindrical shape by a bag making machine and transferred horizontally, and a cylinder to which the article is supplied. A pillow package is manufactured by applying a center seal to the overlapping surface of the longitudinal edge of the film-like film with a center sealer, and further end-sealing and cutting with an end-seal device before and after sandwiching the cylindrical film article. .

  The end seal device includes a pair of heater blocks opposed to each other up and down across the transfer path of the tubular film, and in a state where the tubular film is sandwiched by both heater blocks, the end seal device has a tubular shape along the transfer direction of the tubular film. Move horizontally at the same speed as the film transfer speed, apply the end seal, protrude the cutter built in the heater block, cut the center part of the end seal, move away from each other while retracting the cutter, and again What repeats the movement which contact | abuts mutually and horizontally moves is employ | adopted suitably. Such a system of the end seal device is referred to as a box motion system (for example, see Patent Document 1).

  In the pair of upper and lower heater blocks, the upper heater block is provided with a through hole for incorporating a cutter, and the lower heater block is provided with a through hole for receiving a protruding cutter. The cutter built in the upper heater block is projected and retracted by an actuator such as an air cylinder located above the cutter. It protrudes during heat sealing and is retracted otherwise. The heater block is provided with a heater for heating in order to heat seal the film.

  In such a box motion type end seal device, the cutter may be removed for reasons such as cleaning of the cutter mounted on the heater block, polishing of the blade, and replacement of parts. As the end seal device is used, the film residue welded by the heat of the heater block may adhere to the cutter. In addition, when the object to be packaged is caught between the upper and lower heater blocks, the object to be packaged may be clogged in the cutter blade edge and the through hole. Thus, in the state where the foreign matter has adhered to the cutter, not only the film cannot be cut satisfactorily, but also the problem that the package continuously flows to the subsequent process due to poor cutting occurs. For this reason, it is necessary to clean the cutter at an appropriate timing.

  As shown in FIG. 8, the cutter 12 is fixed to the elevating block 18 using bolts, and an actuator such as an air cylinder 16 is installed immediately above the elevating block 18. For this reason, in the removal operation, as shown in FIG. 9, the bolts are removed from the cutting edge side of the cutter 12, that is, in a state where the upper and lower heater blocks 5a and 5b are opened, and the cutter 12 is moved below the upper heater block 5a. The operation was troublesome. First, the upper and lower heater blocks 5a and 5b are moved to the maximum opening position, and the two cutter mounting bolts 21 are removed using a tool. As a result, the cutter 12 that has been unfixed from the end seal portion falls down through the through-grooves of the heater blocks 5a and 5b, so that it is received by the operator or directly below the heater blocks 5a and 5b. It was dropped on a working sheet such as waste cloth. In addition to the work in a narrow space where the heater blocks 5a and 5b are open, the cutter 12 is built in the heater block 5a, so the temperature is high and handling is necessary.

  If the cutter 12 can be pulled out, the replacement work becomes easy. However, an air cylinder 16 for operating the cutter exists above the upper heater block 5a incorporating the cutter 12, and the cutter 12 cannot be pulled out upward. It was difficult.

  As a solution to this problem, a technique has been proposed in which the position of the air cylinder for operating the cutter can be rotated during maintenance (see Patent Document 2). Thereby, the ease of maintenance is solved to a certain extent.

  However, the method of Patent Document 2 is somewhat complicated as compared with the conventional mechanism in that the number of parts is increased and a rotating shaft and a guide pin are provided. Further, since the air cylinder is rotated, it is necessary to devise at the time of assembling the machine, for example, it is necessary to provide a margin for piping connected to the air cylinder so as not to prevent the rotation.

JP, 2006-31470, A Paragraph 2 to Paragraph 3 JP, 2010-36977, A paragraph 6 to paragraph 14 and Drawing 4

  There is a need for an end seal device for a bag-filling-packaging machine that has a simple configuration and that can be easily pulled out and that can be easily pulled out and can be easily maintained.

The first invention is an end seal device for a bag making filling and packaging machine that seals and cuts a tubular film containing an article to be packaged in the lateral direction of the packaging film in the traveling direction,
A heater block disposed above and below the tubular film;
A drive mechanism for moving the heater block in the front-rear and up-down directions while maintaining the state where the seal surfaces are opposed to each other;
At least one of the heater blocks arranged above and below, a cutter arranged so as to be movable in the vertical direction within the heater block;
An actuator for projecting and retracting the blade at the tip of the cutter from the sealing surface;
The cutter is attached to a cutter holder with a grip handle,
The cutter holder is detachably fixed to the lifting block with fixing brackets such as bolts,
An end seal device for a bag making filling and packaging machine, wherein the actuator is attached above the lifting block so as to avoid the upper side of the cutter holder.

  According to the first invention, since there is nothing to block the upper part of the cutter holder, the cutter holder to which the cutter is attached can be pulled upward by removing a fixing bracket such as a bolt while holding the grip handle.

  A second invention relates to the first invention, wherein the fixing bracket such as a bolt has a gripping part such as a handle and can be removed without using a tool. It is an end seal device of a filling and packaging machine.

  According to the second aspect of the invention, since the fixing bracket such as the bolt has a portion such as a handle that can be gripped, it can be attached and detached without a tool.

  A third invention relates to the first invention, wherein the actuator is an air cylinder, and is an end seal device for a bag making filling and packaging machine.

  In the present invention, the cutter can be drawn upward with a simple configuration of a cutter holder having a grip handle to which the cutter is attached, an elevating block to which a piston rod of an air cylinder is attached, and a bolt connecting them. Easy maintenance. In addition, since the air cylinder remains fixed, it does not take time even when assembled.

It is the schematic of the bag making filling packaging machine with which this invention is applied. It is a figure explaining box motion operation of an end seal device. It is the schematic of a heater block. It is a perspective view explaining the relationship between an end seal device and a cutter. It is a figure explaining operation | movement of a cutter. It is a figure explaining the removal procedure of a cutter. It is a perspective view explaining removal of a cutter. It is a perspective view explaining the relationship between the end seal apparatus of a prior art example, and a cutter. It is a figure explaining the removal procedure of the cutter of a prior art example.

  FIG. 1 is a schematic view showing the entire bag making and filling machine to which the present invention is applied. Operation | movement of a bag making filling packaging machine is demonstrated using FIG. The operation of the bag making and filling machine is as follows. The belt-like film Fw is pulled out from the original roll Fr by the paper feeding mechanism (paper feeding roller 1 and paper drawing roller 2) and continuously fed in the downstream direction, and the film is formed into a substantially closed curved film by the cylinder making device 3. Then, the packaged product P is sent. The curved film with the packaged product P inside is bonded to the both ends in the width direction by the center sealer 4 and the center seal 6 is applied to form the tubular film Ft. A cutter (see FIG. 1) is provided with an end seal by an end seal device 5 including an upper heater block 5a and a lower heater block 5b in a direction crossing the cylindrical packaging material Ft between P and embedded in the upper heater block 5a. The cylindrical film Ft is cut in the middle of the end seal in the seal width direction, and a bag package Bp in which the packaged product P is wrapped in the packaging bag is manufactured.

  Next, operation | movement of an end seal apparatus is demonstrated using FIG. The end seal device 5 of the present embodiment is called a box motion type, and a pair of heater blocks 5a and 5b arranged above and below with the tubular film Ft sandwiched between the seal surfaces 10a and 10b. The robot moves along a predetermined locus while maintaining the state. That is, both heater blocks 5a and 5b move close to each other from the reference position and sandwich the tubular film Ft from above and below, thereby pressurizing and heating the film portion in contact with the sealing surfaces 10a and 10b with a predetermined pressure. . The heater blocks 5a and 5b move forward along the moving direction of the tubular film Ft while maintaining the state in which the heater blocks 5a and 5b approach each other and sandwich the tubular film Ft as described above. The moving speed at this time is equal to the moving speed of the tubular film Ft. When the pair of heater blocks 5a and 5b move by a predetermined distance, both the heater blocks 5a and 5b move away from each other and move in the direction opposite to the moving direction of the tubular film Ft to reach the reference position.

  Since the box motion operation is a conventionally known technique, detailed explanation is omitted, but the heater blocks 5a and 5b are respectively mounted on a mounting base (not shown), and a cam floor (not shown) provided on the mounting base is provided. It coincides with a groove cam (not shown) provided on a cam plate (not shown), and revolves as described above according to the shape of the groove cam. The cam plate is rotated by a servo motor (not shown) so as to synchronize with the conveyance speed of the tubular film Ft. Also, instead of using the cam in this way, a plurality of drive motors are provided such as a drive motor for moving the heater blocks 5a and 5b up and down and a drive motor for moving forward and backward, and each of these drive motors is provided. The heater blocks 5a and 5b can be revolved by operating at an appropriate timing.

  As shown in FIG. 3, each of the heater blocks 5a and 5b has a through hole 11 at the center of the seal surfaces 10a and 10b. A heat pipe 14 having a function of keeping the surface temperature of the heater 13 and the sealing surfaces 10a and 10b uniform is incorporated. And as shown in FIG. 4, the cutter 12 is arrange | positioned so that a vertical movement is possible in the through-hole 11 provided in the upper heater block 5a. The cutter 12 has a sawtooth-shaped blade portion 12a at the lower end. The cutter 12 is configured to be able to move up and down relatively with respect to the upper heater block 5a by receiving a force from an actuator attached to the upper surface of the upper sealer mounting base 15. The actuator that moves the cutter 12 in this embodiment is an air cylinder 16. 4A is a view of the vicinity of the upper heater block 5a as viewed from the front, and FIG. 4B is a view as viewed from the side, showing a state in which the cutter 12 is drawn. FIG. 4C is a side view showing a state where the cutter 12 protrudes.

  As shown in FIG. 5, when the upper heater block 5a is at the lowest position, the cutter 12 operates the air cylinder 16 and the blade 12a protrudes below the seal surface 10a. On the other hand, the through-hole provided in the lower heater block 5b is provided at a position facing the through-hole 11 of the upper heater block 5a, and the blade portion 12a of the cutter 12 protruding below the seal surface 10a is formed by the cylindrical film Ft. While being pushed out, it is inserted into the through hole. Thereby, the cylindrical film Ft is cut | disconnected by the horizontal direction along the blade part 12a.

  Further, as shown in FIG. 4B for explaining the drive mechanism of the cutter 12, the upper sealer mount 15 and the upper heater block 5a are provided with through holes 11, respectively. The through hole 11 is positioned on the same plane, and the cutter 12 is inserted into the through hole 11 so as to be movable up and down. The cutter 12 is connected to the cutter holder 17 at its upper end. The cutter holder 17 includes a grip handle 19 and is connected to the lifting block 18 with a bolt 20. The bolt 20 of the present embodiment is a bolt that is tightened or loosened using a hexagon wrench. The elevating block 18 is connected to the air cylinder 16 so as to avoid directly above the cutter holder 17. The air cylinder 16 is connected to the upper sealer mounting base 15 by a connecting member not shown here. Thereby, the cutter 12 can be moved up and down relatively with respect to the upper heater block 5 a by the operation of the air cylinder 16.

  As described above, the upper portion of the cutter holder 17 is an open space. The cutter holder 17 to which the cutter 12 is connected is connected by a bolt 20. Therefore, as shown in FIGS. 6 and 7, the cutter 12 can be removed simply by removing the bolt 20 and holding the grip handle 19 and pulling it upward. Further, the cutter 12 can be removed even when the heater block 5a is not opened as in the prior art. Also, when the cutter 12 that has undergone maintenance such as cleaning and blade polishing is attached, it is possible to work easily as in the case of removal.

  In this embodiment, the bolt 20 is a bolt that is tightened or loosened using a hexagon wrench, but any other shape may be used as long as it is a bolt. For example, a bolt with a handle may be tightened or loosened without using a tool. In addition to bolts, other fixing brackets such as one-touch locks that can be securely locked and can be easily removed without using a tool may be used.

  The actuator that moves the cutter 12 in this embodiment is the air cylinder 16, but may be other fluid cylinders, solenoids, or motors.

DESCRIPTION OF SYMBOLS 1 Paper feed roller 2 Paper drawing roller 3 Cylinder 4 Center sealer 5 End seal device 5a Upper heater block 5b Lower heater block 6 Center seal 10a, 10b Seal surface 11 Through-hole 12 Cutter 12a Saw blade 13 Heating heater 14 Heat pipe 15 Heater block mounting base 16 Air cylinder 17 Cutter holder 18 Lifting block 19 Grip handle 20 Bolt 21 Cutter mounting bolt

Claims (3)

An end seal device for a bag-filling and packaging machine that cuts and cuts a cylindrical film that encloses an article to be packaged in a lateral direction of the packaging film,
A heater block disposed above and below the packaging film;
A drive mechanism that moves the heater block in the front-rear and up-down directions while maintaining the state where the seal surface is opposed,
At least one of the heater blocks arranged above and below, a cutter arranged to be movable in the vertical direction within the heater block,
An actuator for projecting and retracting the blade at the tip of the cutter from the sealing surface;
The cutter is attached to a cutter holder with a grip handle,
The cutter holder is detachably fixed to the lifting block by a fixing bracket such as a bolt,
An end seal device for a bag making filling and packaging machine, wherein the actuator is mounted above the lifting block so as to avoid the upper side of the cutter holder.   The end seal device for a bag making filling and packaging machine according to claim 1, wherein a fixing metal fitting such as a bolt is provided with a gripping part such as a handle and can be removed without using a tool. The end seal device for a bag making, filling and packaging machine according to claim 1, wherein the actuator is an air cylinder.

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