JPH0326087Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> The present invention involves making a belt-shaped packaging material into a cylinder while continuously transferring it, polymerizing and sealing both edges to form a cylinder, and placing items inside the cylinder at regular intervals. After inserting each
Relating to an automatic packaging machine that applies a seal and cuts or makes perforations for cutting in a direction perpendicular to the direction of transition of packaging material between items,
In particular, it consists of a box motion type seal cut mechanism and an endless conveyor mechanism for transporting goods, and both ends of the seal cut mechanism support a sending roll that constitutes the upstream conveyor table surface and a receiving roll that constitutes the downstream conveyor table surface. The present invention relates to a heat-fusion sealing device in which a roll reciprocating means for reciprocating along the conveyor transport direction, which is the horizontal component of the box motion, is greatly simplified.

<Prior art and its problems> A conventional heat-fusion sealing device for a horizontal bag making and filling machine is shown in FIGS. 5, 6, and 7. This device is
This is a heat-welding sealing device for a box motion type automatic packaging machine, in which both ends of the upper and lower heater mounting plates are slidably engaged with a rotating lever in the direction of the lever base, and are guided by an endless groove cam, Special Publication No. 43-22552 and Special Publication No. 53-16546
It has substantially the same configuration as the device of No.

5 and 6 mainly show the seal cut mechanism.

1 is an upper heater mounting plate, 2 is a lower heater mounting plate, 3 and 4 are guide rods (vertical guide means), 5, 6,
7, 8 are engagement rods, 9, 10, 11, 112 are pivot levers, 9a, 10a, 11a, 12a are slits of each pivot lever, 13, 14, 15, 16 are annular groove cams, 17 is an upper heater, 18 is a lower heater, 19 is a spring, 20 is a push cutter, 21,
22, 25, 26 are rotating shafts, 23, 24, 27,
28 is a gear, 48 is a hanging frame, 49 is a device frame,
50, 51, 54, and 55 are bearings, and 56, 57 are spacers.

Upper heater mounting plate 1 and lower heater mounting plate 2
is equipped with heater 17 or 18 and heater 1
A push cutter 20 is integrally provided at the center of the width of the upper heater mounting plate 1, and is placed horizontally perpendicular to the flow of the cylindrical film (not shown) and faces the top and bottom of the cylindrical film. They are slidably fitted into a pair of guide rods 3 and 4 rising from both ends of the mounting plate 2, so that they always face each other in a vertical plane and can move toward and away from each other. The heaters 17 and 18 have a shape that can be attached in two strips or have a slit to seal the two strips. Forced. Both mounting plates 1 and 2 are connected to each other through engagement rods 5, 6, 7, and 8 provided at each end in a vertical plane parallel to the flow of the cylindrical film provided outside each end. Two pairs of rotating levers 9, 1
0, 11, 12 tip slits 9a, 10a,
11a, 12a, and the upper heater mounting plate 1 is connected via engagement rods 5, 6 to a pair of annular groove cams 13, 14 with flat bottom grooves provided outwardly at both ends. Further, the lower heater mounting plate 2 is guided via engaging rods 7 and 8 to a pair of annular groove cams 15 and 16 provided outwardly at both ends and having flat groove upper portions. Swivel lever 9,1
0 is fixed to rotating shafts 21 and 22 provided through the respective central parts of the annular grooved cams 13 and 14, and the turning levers 11 and 12 are fixed to the respective central parts of the annular grooved cams 15 and 16. gears 23 and 24 fixed to the outer ends of the rotation shafts 21 and 22;
are meshed with gears 27 and 28 fixed to the outer ends of rotating shafts 25 and 26, respectively, and gears 23 and 24
, two gears are meshed together and rotated together by a motor (not shown).

Therefore, when the motor is driven, both heater mounting plates 1, 2 are moved to the pair of pivot levers 9, 10 or 11, 1 via the engaging rods 5, 6 or 7, 8, respectively.
2, the annular groove cam 13, 14 or 1
5 and 16, and then performs a plane-symmetrical box motion with respect to the cylindrical film. Therefore, the upper and lower heaters 17 and 18 move together with the cylindrical film while pinching and heat-sealing the cylindrical film at the upstream position, and then move away vertically at the downstream position and return to the upstream position.

FIG. 7 shows a part of the endless conveyor mechanism for transporting articles. Reference numeral 58 is a cast metal belt conveyor extending movable stand, which has rollers 59 and is placed on the floor plate 60 of the apparatus. The movable frame 58
are two pairs of columns 58a, 58a, which are provided on both sides so as to slide and sandwich the side surfaces of the lower heater mounting plate 2.
At its upper end, it supports a delivery roll 61 or a receiving roll 62, and also supports slidably gusset claws 63, 63 constituting a gusset device. The endless belt 64 is wrapped around an upstream conveyor table surface 64a and a downstream conveyor table surface 64b, and between the sending roll 61 and the receiving roll 62,
It is wrapped around the bottom so as not to interfere with the box motion of the lower heater mounting plate 2.

Therefore, the belt conveyor tensioning movable frame 58
is a roll reciprocating means that reciprocates along the conveyor transport direction on the apparatus floor plate 60 to cause the sending roll 61 and the receiving roll 62 to move the horizontal component of the box motion.

However, the heat-melting sealing device having the above configuration is equipped with a belt conveyor-stretched movable frame 58 that is difficult to assemble to the device floor plate 60, and the device floor plate 60 is
Since the structure is such that it slides so as to occupy a large part of the apparatus, assembly is complicated, and it is also difficult to install support brackets for rolls other than the delivery roll 61 and the receiving roll 62 from above the apparatus floor plate 60. .

FIG. 8 shows a part of the endless conveyor mechanism for transporting articles of a heat-welding sealing device for another conventional horizontal bag making and filling machine, in which both ends are engaged with horizontal guides 65 provided on the floor plate 60 of the device. There is a reciprocating table 66 in the form of a flat plate made of cast iron that is guided together, and guide rods 3, 3, two on each side rising from the reciprocating table 66, pass through and guide the upper heater mounting plate 1 and the lower heater mounting plate 2. At the same time, brackets 67 are fixed to the two guide rods 3, 3 on each side to support the delivery roll 61 and the receiving roll 62 at both ends. In this device, the reciprocating table 66 is simpler than the conveyor-stretched movable pedestal 58 of the conventional example and is easier to mount on the equipment floor plate 60, but the size seen from the plane is not much different from the conveyor-stretched movable pedestal 58; Similar to the conventional example described above, it is difficult to install support brackets for rolls other than the roll 61 and the receiving roll 62 from above the apparatus floor plate 60.

<Purpose of the invention> This invention was devised in view of the points mentioned above.
By constructing the roll reciprocating means that supports the delivery roll and the receiving roll at both ends using extremely small parts, the support brackets for the rolls other than the delivery roll and the receiving roll can be formed as a single part and attached to the equipment floor plate. It is an object of the present invention to provide a heat-melting sealing device for an automatic packaging machine that is improved so as to facilitate wrapping on an endless conveyor and reduce manufacturing costs.

<Structure of the invention> As a means to solve the above-mentioned problems, the present invention includes a seal cut mechanism that applies an end seal between the objects to be packaged in a cylinder to be packaged using an upper heater 17 and a lower heater 18 that perform box motion vertically symmetrically; A belt conveyor for transferring goods, which has an upstream conveyor table and a downstream conveyor table that are provided on the upstream side and the downstream side so as to sandwich the heaters 17 and 18, and whose table lengths change according to the horizontal movement of the heaters 17 and 18. The seal cut mechanism has a guide rod having one end fixed to both ends of either the upper or lower heater mounting plate 2 and the other end slidably penetrating the other heater mounting plate 1. As a result, the upper and lower heater mounting plates 1 and 2 are configured to face each other vertically in a vertical plane to perform a symmetrical motion, and the belt conveyor mechanism for transporting items is arranged upstream of the heaters 17 and 18. The downstream end of the belt conveying surface of the upstream conveyor belt is stretched by the feed roll 61 provided near the side, and the heater 17,
A receiving roll 62 provided near the downstream side of 18
A heat-fusion sealing device for an automatic packaging machine configured to stretch the upstream end of the belt conveyance surface of a downstream conveyor belt at a temperature of 100 mm, and a horizontal guide in the conveyor conveying direction in proximity to each of the guide rods 3 and 4. The rod 68 is horizontally suspended, and a horizontal movable bracket 70 is provided which is slidably fitted to the horizontal guide rod 68, and a vertical guide portion attached to the horizontal movable bracket 70 is located close to the horizontal movable bracket 70. By being engaged with the guide rods 3, 4, the horizontal movement bracket 70 moves the heaters 17,
18, and is provided to perform horizontal movement in synchronization with the sending roll 61 and the receiving roll 6.
2 is supported via the horizontal movement bracket 70 and is provided to perform horizontal movement in synchronization with the heaters 17 and 18.

Therefore, since the horizontally movable brackets 70, 70 are guided by the horizontal guide rods 68, 68, respectively, they do not move up and down, but reciprocate in response to the rocking of the guide rods 3, 4. However, since the guide rods 3 and 4 perform a box motion, the horizontal motion bracket 70 performs a reciprocating motion which is the horizontal component of the box motion, and the lower heater mounting plate 2
There is no change in the horizontal direction between the receiving roll 62 and the sending roll 61 on both sides thereof, and the lower heater mounting plate 2 can rise without interfering with both rolls.

In short, by simply installing a new horizontal guide rod 68 and a horizontal movement bracket 70 on each side away from the equipment floor plate, the receiving roll 62 and delivery roll 61 that perform reciprocating motion, which is the horizontal component of the box motion, can be supported. It is extremely small and can be simply constructed with a small number of parts, and a bracket for supporting rolls other than the sending roll and receiving roll can be attached to the equipment floor plate, making it easier to wind the endless conveyor. This leads to a reduction in production costs.

<First Embodiment> FIGS. 1 and 2 show a first embodiment of a heat-fusion sealing device for an automatic packaging machine of the present invention. Furthermore, the fifth
Components that are the same as those in the figures are designated by the same reference numerals, and only new parts will be described.

A push-cut cutter 20 is mounted on the upper heater mounting plate 1 so that it can be pushed to the center of the width of the heater 17 and is lifted up by the bias of springs 34, 34.
Horizontal rod 3 fixed on the upper side of the push-cut cutter 20
Push-off rods 36, 36 are connected to both ends of 5,
The push-off rods 36, 36 are made of hollow tubes and are passed through guide rods 3, 4 which are provided to hang down from the upper heater mounting plate 1 and slidably penetrate the lower heater mounting plate 2, so that the lower ends thereof are connected to each other. is lower heater mounting plate 2
It is connected to a push-off actuating rod 37 provided horizontally on the lower side. The push-off operation rod 37 is connected to the annular groove cam 1 via engagement rods 38 and 39 at both ends.
It is slidably pivoted to the slits 40a, 41a at the tips of a pair of swing levers 40, 41 that are newly provided on the lower side of the swing levers 40, 41, and rotates in a vertical plane. The lower portions of the grooves newly provided on both outer sides are guided by a pair of flat annular groove cams 42 and 43. The pivot levers 40 and 41 are provided with rotating shafts 4 that pass through the center portions of the annular groove cams 42 and 43, respectively.
The rotating shafts 44, 4 are fixedly supported at both ends by the rotating shafts 44, 45.
Gears 46 and 47 fixed to the outer end of gear 2
7 and 28 are meshed with each other. The gears 27 and 28 are meshed with two integrally provided gears (not shown) which are rotated by a motor. The annular grooved cams 42 and 43 are provided corresponding to the annular grooved cams 13 and 14, and are swollen in the middle of the lower flat grooves compared to the annular grooved cams 13 and 14. Mi 42a, 43
Only a is different. However, the box motion of the push cutter 20 is generated by the annular groove cams 42 and 43, and the box motion of the heater mounting plate 1 is generated by the annular groove cams 13 and 14, so that the bulges 42a and 43a are Depending on the presence or absence of the box motion, a relative displacement occurs between the two box motions, thereby causing the push-off rods 36, 36 to slide relative to each other. Therefore, the push cutter 20
In this method, while the upper heater 17 and the lower heater 18 are moving with the cylindrical film sandwiched between them and heat-sealing the film, a push-cut movement is performed to cut between the two heat-sealed portions of the cylindrical film. Perforations (intermittent cuts) for cuts can be made.
The bearings 50, 51, 52, 53 are fixed to the hanging frame 48, and the bearings 54, 55 are guided by the hanging frame 48 and biased by the upper springs 32, 32 with large wire diameters, so that between the bearings 50 and 52, Between 51 and 53, 50 and 54
spacers 56 to 5 between and between 51 and 55
9, and the lower part of the hanging frame 48 is lifted and supported by the device frame 49 in an adjustable manner.
The adhesion level of the cylindrical film can be freely adjusted to match the height center of the packaged product accommodated in the cylindrical film, and the bearings 54 and 55 can escape upward by the thickness of the cylindrical film when the cylindrical film is brought into close contact. can.

In particular, in the present invention, horizontal movable brackets 70, 70 are fitted and slidably provided in the middle of the guide rods 3, 4, that is, between the upper heater mounting plate 1 and the lower heater mounting plate 2. Dynamic brackets 70, 70 support the receiving roll 62 and the sending roll 61 at both ends. Horizontal guide rods 68, 6 are arranged close to the guide rods 3, 4 and are horizontally offset in the conveyor transport direction.
8 are provided by appropriate fixing members 69, 69, and each of the horizontal movement brackets 70, 70 is also slidably fitted to the fixing members 69 on each side.

In other words, the horizontal motion bracket 70 has two shaft holes that pass each other in a cross shape, and one shaft hole extends in the vertical direction and fits into the guide rod 3 (or 4) that performs box motion. The other shaft hole extends horizontally and is fitted into a fixed horizontal guide rod 68, supporting the receiving roll 62 and the sending roll 61 at both ends.

Therefore, the receiving roll 62 and the sending roll 6
1 performs a reciprocating motion which is the horizontal component of the box motion, and there is no change in the horizontal direction between the lower heater mounting plate 2 and the receiving roll 62 and delivery roll 61 on both sides thereof.

With the above configuration, the upper surface of the apparatus floor plate 60 is open, so that the receiving roll 62 can be opened as shown in FIG.
The brackets 71, 71 that collectively support the rolls other than the feed roll 61 can be bolted and erected from the top surface of the equipment floor plate 60. Therefore, it is possible to assemble the bracket 71 on one side and a large number of rolls to be supported by it. After attaching the bracket 71, it is possible to fix it to the upper surface of the apparatus floor plate 60, stretch the endless belt, and then assemble the other bracket 71, which facilitates assembly.

<Other Modifications> The present invention is not limited to the above-described embodiments, but can also be applied to a heat-fusion sealing device as shown in FIG. 4. The device differs from the conventional example shown in FIG. 5 in that it does not have a grooved cam, and the same parts are given the same reference numerals and their explanation will be omitted. Also, guide rods 3 and 4
This is not limited to the case where there is one on each side, but also applies when there are two on each side. The fixing members 69, 69 are
It is sufficient if it is provided from the device frame 49.
There may also be two horizontal guide rods 68 on each side. The relationship between the guide rods 3 and 4, the horizontal guide rod 68, and the horizontal moving bracket 70 is such that the horizontal guide rod 68 passes horizontally in the conveyor transport direction with respect to the vertical guide rods 3 and 4. horizontally moving brackets 70 on both sides at the part where they pass each other.
It is sufficient that they are slidably fitted, and a dovetail groove type fitting is also acceptable.

<Effects of the invention> As explained above, the heat-melting sealing device of the automatic packaging machine of the invention has a box that is installed from either the upper heater mounting plate or the lower heater mounting plate and guides the other so that the other can be freely separated. For the vertically extending guide rod that performs motion, a horizontal guide rod is provided that passes horizontally in the conveyor conveyance direction, and a horizontal motion bracket with two engagement guide parts that pass vertically and horizontally is installed between the guide rod and the horizontal guide rod. The rods are attached to each other at different locations, and the horizontal movement bracket supports both ends of the delivery roll, which constitutes the upstream conveyor table surface, and the receiving roll, which constitutes the downstream conveyor table surface. A roll reciprocating means device for moving the horizontal component of the box motion can be provided at a location remote from the floor plate, so that the bracket for supporting rolls other than the delivery roll and the receiving roll can be provided as a single component. It can be formed into a panel shape and mounted on the floor board of the equipment, making it easier to wrap around an endless conveyor, and it can be configured extremely simply with only a few small parts, leading to a reduction in manufacturing costs.

[Brief explanation of drawings]

1 and 2 relate to a first embodiment of a heat-melting sealing device for an automatic packaging machine of the present invention, in which FIG. 1 is a longitudinal sectional front view, FIG. The figure is a perspective view of essential parts. FIG. 4 is a schematic front view of a heat-fusion sealing device of another automatic packaging machine to which the present invention can be applied. Figure 5,
6 and 7 relate to a conventional heat-melting sealing device for an automatic packaging machine, in which FIG. 5 is a vertical front view, FIG. 6 is a cross-sectional view, and FIG. 7 is a perspective view of a main part. FIG. 8 is a perspective view of a main part of a heat-fusion sealing device of another conventional automatic packaging machine. 1... Upper heater mounting plate, 2... Lower heater mounting plate, 9, 10, 11, 12... Swivel lever, 1
3, 14, 15, 16... annular groove cam, 17...
Upper heater, 18... Lower heater, 20... Push cutter, 61... Delivery roll, 62...
Receiving roll, 68, 68... horizontal guide rod, 69, 69... fixing member, 70... horizontal movement bracket.

Claims (1)

[Scope of Claim for Utility Model Registration] A seal cut mechanism that applies an end seal between the packaged items in a packaging cylinder using an upper heater and a lower heater that perform box motion vertically symmetrically, and an upstream side and a downstream side that sandwich the heater. a belt conveyor mechanism for transferring goods, the belt conveyor mechanism having an upstream conveyor table and a downstream conveyor table, the table length of which is changed according to the horizontal movement of the heater; By having a guide rod fixed to both ends of the mounting plate and having the other end slidably penetrated through the other heater mounting plate, the upper and lower heater mounting plates are vertically opposed to each other in a vertical plane. The belt conveyor mechanism for transferring goods is configured to perform a symmetrical motion, and the belt conveyor mechanism for transferring goods tensions the downstream end of the belt conveyance surface of the upstream conveyor belt with a delivery roll provided near the upstream side of the heater, and A heating, melting and sealing device for an automatic packaging machine configured to stretch the upstream end of the belt conveying surface of a downstream conveyor belt with a receiving roll provided near the downstream side, the conveyor conveying device being close to each of the guide rods. A horizontal guide rod is horizontally suspended in the horizontal direction, and a horizontal movement bracket is provided that is slidably fitted to the horizontal guide rod, and a vertical guide portion attached to the horizontal movement bracket is provided in the vicinity of the horizontal movement bracket. The horizontal movement bracket is provided to perform horizontal movement in synchronization with the heater by being engaged with a guide rod, and the sending roll and the receiving roll are supported via the horizontal movement bracket and moved in synchronization with the heater. 1. A heat-melting sealing device for an automatic packaging machine, characterized in that it is provided to perform horizontal movement.