JPH02282005A - Belt conveyor for box motion type heat melt cutting sealing device for horizontal bag making filling packaging machine - Google Patents

Abstract

PURPOSE:To prevent short sized articles, small articles and heavy weight articles, etc., from falling off by making a movable belt roll for table on the downstream side separate from a movable belt roll for table on the upstream side when upper and lower heaters are closed. CONSTITUTION:A movable belt roll for table 4a on the downstream side, which approaches to the upstream side to a heater H2 on the lower side, is constituted to become a movable belt roll with a double slide structure for which the conveyor belt is arranged not to sag. Therefore, a horizontal motion which is equivalent to the horizontal component of a box motion by upper and lower heaters H1, H2 can be performed. In addition, when the upper and lower heaters H1, H2 are opened, an interval between the movable belt roll for table 2a on the upstream side and the movable belt roll for table 4a on the downstream side is made larger by a horizontal motion by either one of the belt rolls in the separating direction. Also, when the heaters are opened, the interval between the movable belt roll for table 2a on the upstream side and the movable belt roll for table 4a on the downstream side is closed by a horizontal motion by either one of the belt rolls in the approaching direction. By this method, at the time of packaging of short sized articles, small articles and heavy weight articles, etc., accidents due to falling of articles to be packaged are eliminated.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a product delivery conveyor in a horizontal bag-forming-fill-sealing machine such as a horizontal billow packaging machine, and particularly to a belt conveyor incorporated in a box motion type heat-sealing device. Regarding.

[Prior Art and its Problems] First, a box motion type heat-melting sealing device of a conventional horizontal bag-forming-filling-sealing machine will be briefly explained. This device has a box motion between the upper and lower heaters. Here, to explain the operation of the box motion, the upper and lower heaters are opened vertically and then closed at the upstream position so as to be aligned with the registration mark on the wrapping paper, and moved a predetermined distance in synchronization with the speed of the wrapping paper. This action opens up and down again at the downstream position and returns to the upstream position, which has the advantage of allowing more time to heat-seal the wrapping paper compared to a rotary cutter.

There are various mechanisms for box motion of the upper and lower heaters. For example, there is a structure in which both ends of the upper and lower heaters are attached to connecting links of a double crank mechanism, and a structure in which both ends of the upper and lower heaters are attached to a front cam (
There is a structure (for example, Japanese Utility Model Publication No. 82-54910) that engages a grooved cam and rotates a flat circular cam groove of a front cam using a crank.

” - The box motion of the lower heater means that on the J: stream side and downstream side of the heater.

There is a need for a conveyor in close proximity to the heater that is speed synchronized and has a substantially variable table length, of which there are conventionally two types of conveyors with very specific constructions:
Both are still in use today. One is an endless roller conveyor. In other words, an endless conveyor chain is wound vertically left and right, and a large number of rollers are wound around the conveyor chain, and the number of rollers is thinned out at regular intervals, so that the space below the It has a structure in which the heater appears and disappears. The other type is a belt conveyor, in which the belt conveying surface drops down in the middle with a gap, and the conveyor belt is hung so that the gap moves back and forth, and from the gap below. It has a structure in which the heater on the side appears and disappears.

Roller conveyors are troublesome to assemble, make a lot of noise, and may be disliked by customers due to gaps between the rollers. and escapes downward,
Even if the packaged item is a short item, a small item of one weight, or a bulk item, the packaged item will not fall from the part where the roller is not provided.

On the other hand, belt conveyors operate quietly, but if the package is small, the package may be separated on the table surface on the downstream side when the lower heater sinks into the gap midway on the belt conveyance surface. It cannot be applied to the packaging of small items, etc., as there is a problem that the lower heater may fall off the table surface. Therefore, when the lower heater sinks from the table surface, the gap in the middle of the belt conveying surface is closed, and it can be used for packaging small items, etc. There is a device that can also be applied (Utility Model Publication No. 49-28133).

However, in this invention, when the belt is operated at high speed, the rising speed of the lower heater becomes faster, and the lower heater strongly flips up the small roller that closes the gap in the middle of the belt conveying surface. Small rollers have low durability and require replacement after a short period of time. It also becomes a source of noise. Furthermore, small rollers are not capable of feeding the packaged items in parts, so even though they can be used to package short and small items, there is a limit to the size of the rollers, and if they are smaller than a certain size, When it comes to short items and small items, there is a problem that the packaged items may fall into the gap in the middle of the belt conveyance surface. Furthermore, depending on the type of packaged item, there is a risk that the bottom surface may be damaged.

[Problems to be Solved by the Invention] The present invention provides for adjusting the length of the upstream belt conveying surface and the downstream belt conveying surface so as to match the reciprocating horizontal movement of the horizontal component of the box motion of the upper and lower heaters of the heating melt sealing device. In addition, the upstream belt conveying surface is adjusted such that when the lower heater is in the lowered position, there is virtually no gap between the upstream belt conveying surface and the downstream belt conveying surface. To provide a belt conveyor for a box motion type heat-melting sealing device of a horizontal bag-forming-fill-sealing machine whose length can be changed doubly and can be applied to packaging short products, small products, heavy products, etc. The purpose is to

[Means for Solving the Problems] The belt conveyor for the box motion type heat-melting sealing device of the horizontal bag-forming-filling-sealing machine of the present invention has upper and lower heaters H.
1. It can be incorporated across the upstream and downstream sides of a box motion type heat-fusion sealing device of a horizontal bag-forming-fill-sealing machine that performs an end seal between the packaged items W and W of the packaged tube F in H2, and the lower side. When the heater H2 rises, the horizontal movement of the movable table 6, which is provided laterally across the upstream conveyor A and the downstream conveyor B and is horizontally movable along the conveyor conveyance direction, causes the movable belt roll 2 for the upstream table to move horizontally.
Box motion type heating of a horizontal bag-forming-fill-sealing machine, in which a movable belt roll 4a for a table on the downstream side moves horizontally together with the lower heater H2 while remaining close to the lower heater H2. A belt conveyor for a fusing sealing device includes: a movable block 7 provided on the movable table 6 and horizontally movable along the conveyor transport direction independently of the movable table 6; and movable block moving means for horizontally moving the movable block 7. 8, the upstream belt roll group 2 constituting the upstream conveyor A includes upstream table movable belt rolls 2a and A shaft is provided at a predetermined position between the upstream side movable belt roll 2b for taking up deflection, and the upstream side movable belt roll 2b for taking up deflection, and between the upstream table movable belt roll 2a and the upstream movable belt roll 2b for taking up deflection. The conveyor belt 1 is configured to include an upstream side deflection-taking and guide belt roll 2C provided in a fixed position, and the conveyor belt 1 is provided on the outside of the upstream side table belt roll 2a, and also includes an upstream side deflection-taking movable belt. The downstream belt roll group 4, which is wound around the inside of the roll 2b and the outside of the upstream deflection removing and guiding belt roll 2C, and which constitutes the downstream conveyor B, is located at the upper part of the movable block 7 on the downstream side. A movable belt roll 4a for a downstream table and a movable belt roll 4b for taking up downstream deflection, which are pivotally supported at the lower part of the downstream side and have the same roll diameter, and a downstream table below the movable belt roll 4b for taking up downstream deflection. The conveyor belt 3 is configured to include a belt roll 4C for downstream deflection and guide, which is provided with its shaft position fixed at a predetermined position between the movable belt roll 4a for conveyor belt 3 and the movable belt roll 4b for downstream deflection absorption. is wound around the outside of the upstream table belt roll 4a, the inside of the downstream movable belt roll 4b for taking up deflection, and the outside of the downstream belt roll 4C for taking up deflection and guiding. The movable block moving means 8 moves the upper and lower heaters H
1 and H2 are closed, the movable block 7 is moved so that the downstream table movable belt roll 4a is separated from the upstream table movable belt roll 2a, and the upper and lower heaters H1 and H2 are closed. When opening, the movable block 7 is moved so that the downstream table movable belt roll 4a approaches the upstream table movable belt roll 2a. It is characterized by this.

[Function 1: The movable belt roll 4a for the table on the downstream side, which is close to the upstream side of the lower heater H2, is configured to be a movable belt roll with a double slide structure to prevent the conveyor belt from sagging. Therefore, not only can horizontal movement equal to the horizontal component of the box motion of the upper and lower heaters H1 and H2 be performed, but also when the upper and lower heaters H1 and H2 open, the movable belt roll 2a for the upstream table and the downstream table The gap between the movable belt roll 4a for the upstream table and the movable belt roll 4a for the downstream table is opened by the horizontal movement of either belt roll in the separating direction, and when the heater is opened, the gap between the movable belt roll 2a for the upstream table and the movable belt roll 4a for the downstream table is opened. Since the gap between the two belt rolls is closed by the horizontal movement of either of the belt rolls in the approaching direction, the accident of dropping the packaged product when packaging short products, small products, heavy products, etc. is eliminated.

Hereinafter, each embodiment will be explained to the extent that it does not overlap with the explanation of the above-mentioned [Means for Solving the Problems].

[First Embodiment...FIGS. 1 to 3] First, the configuration of a box motion type heat-sealing device of a horizontal bag making/filling/packaging machine in which a belt conveyor according to the present invention is incorporated will be described.

While the upper and lower heaters H1 and H2 perform box motions of vertically symmetrical flat circular trajectories Xi and X2, the packaged cylinder F
Two end seals (heat seals) are applied between the packaged items W and W, and either one (the upper one in the figure)
The cutter K installed when the heater is opened is the heater H1,
During heat sealing of H2, it is pushed and slid to cut between the two end seals. In addition, the box motion of the heaters H1 and H2 is a grooved cam (
Although a front cam) and a crank are used,
It is not limited to this.

Next, the configuration of the belt conveyor according to the present invention will be explained.

Regarding the lower heater H2, the belt conveyor is configured such that the conveyor belt is divided into two parts, an upstream conveyor A and a downstream conveyor B. The conveyor drive source 5 is provided in common to both conveyors A and B, and is configured to drive both conveyors A and B rightward in the drawing at the same speed.

The upstream belt roll group 2 constituting the upstream conveyor section A is provided with a movable belt roll 2a for an upstream table, whose axial position is movable in the horizontal direction, and a fixed axial position. Belt roll 2 for upstream table
d, the conveyor belt 1 is stretched horizontally to form a conveyance surface, and a movable belt roll 2b for taking up deflection on the upstream side is provided at the bottom so that the shaft position can be moved in the horizontal direction.
There are an upstream deflection-receiving/guiding belt roll 2C and an upstream driving belt roll 2e, both of which are provided with fixed shaft positions, to tension the conveyor belt 1 so that it does not slacken.

The downstream belt roll group 4 constituting the downstream conveyor section B is provided with a downstream table movable belt roll 4a whose axial position is movable in the horizontal direction, and a fixed axial position. Belt roll 4 for downstream table
d, the conveyor belt 3 is stretched horizontally to form a conveying surface, and a movable belt roll 4b for taking up deflection on the downstream side is provided at the bottom so that the shaft position can be moved in the horizontal direction.
There are a belt roll 4c for a downstream deflection and guide and a belt roll 4e for a downstream guide, both of which are provided with fixed shaft positions, to tension the conveyor belt 3 so that it does not slacken.

The four movable belt rolls 2a, 2b.

4a and 4b are all the same diameter.

The distance between the upstream deflection-removing/guiding belt roll 2C and the downstream deflection-removing/guiding belt roll 4C, both of which have fixed shaft positions, is the required interval so as not to interfere with the lower heater H2 that performs box motion. It is opened to

The conveyor drive source 5 includes a motor 5a, a sprocket)
Consisting of 5b to 5e, endless chain 5f to 5h,
The sprocket 5e is fixed coaxially with the belt roll 2e, and the sprocket 5c is fixed coaxially with the belt roll 4C.

And the four movable belt rolls 2a.

2b, 4a, 4b can perform a reciprocating horizontal movement equal to the horizontal component of the box motion of the upper and lower heaters H1, H2 by the movable table 6, and furthermore, the movable belt roll 2
a, 2b can horizontally move in accordance with the opening and closing of the upper and lower heaters H1, H2 by horizontally moving the movable block 7 so as not to interfere with the upper and lower heaters H1, H2.

To be more specific, there is a pair of movable tables 6 on both sides of the conveyor, and they consist of a horizontal guide 6a and a table body 6b guided by the horizontal guide 6a. The upper and lower heaters H1 and H2 are supported and fixed to a horizontally movable heater guide member (not shown) so as to guide the upper and lower heaters H1 and H2 so that they can be opened and closed, and the horizontal component of the box motion of the upper and lower heaters H1 and H2 is It is designed to perform a reciprocating horizontal movement equal to . Furthermore, the table body 6b on each side has a block horizontal guide part 61, and a movable block 7 is slidably fitted into the block horizontal guide part 61, and the movable block 7 is fitted on the downstream side. The movable belt roll 4a for the table and the movable belt roll 4b for taking up the downstream side deflection are supported at both ends, and the movable belt roll 2a for the upstream side table and the movable belt roll 2b for taking up the downstream side deflection are respectively supported on the movable table 6. Supported at both ends.

Then, both sides of the lower heater H2 and the movable blocks 7 on each side are connected by movable block moving means 8,
The movable block 7 can freely approach and separate in conjunction with the opening and closing of the upper and lower heaters It and H2. The movable block moving means 8 has a link 8a whose one end is pivotally connected to the movable block 7, and an elongated hole 81 having a required length in the vertical direction, and the other end of the link 8a is engaged with the elongated hole 81. A long hole guide body 8b is fixed to the side end of the heater block HB, which is designed to guide the lower heater H2 and supports the lower heater H2.
When the upper and lower heaters H1 and H2 open,
When the lower heater H2 descends so as not to interfere with the movable belt roll 4a for the downstream table, a pair of links 8a on both sides pull the movable block 7, and the movable belt roll 4a for the downstream table moves to substantially eliminate the gap between the upstream conveyor section A and the downstream conveyor section B.

Furthermore, before the upper and lower heaters H1 and H2 are closed, a pair of links 8a on both sides extend against the movable block 7 to move the block upstream. Before the heater H2 rises, the movable belt roll 4a for the downstream table moves horizontally to ensure a gap between the upstream conveyor section A and the downstream conveyor section B again.

The movable belt roll 2a for the upstream table is located at the upper part of the movable table 6 near the center, and the upstream deflection removing movable belt roll 2b is located at the lower part of the movable table 6 near the downstream, and Both belt rolls 2a and 2b are connected to a pair of movable tables 6 on both sides so that the upstream side deflection-removing movable belt roll 2b is lower than the upstream table movable belt roll 2a by the height of one roll. The upstream deflection removing/guide belt roll 2C is located below the upstream deflection removing movable belt roll 2b and is connected to the upstream table movable belt roll 2 and the upstream deflection removing movable belt. The shaft position is fixed at a required position of the roll 2b. The upstream conveyor belt 1 is placed on the outside of the upstream table movable belt roll 2a, on the inside of the upstream deflection removing movable belt roll 2b, and further on the outside of the upstream deflection removing/guide belt roll 2C. It is wrapped.

Then, the belt contact point of the movable belt roll 2a for the upstream table and the movable belt roll 2 for taking up the upstream deflection.
The conveyor belt portion between the belt contact point b and the belt contact point of the upstream deflection absorbing movable belt roll 2b is stretched horizontally, and the belt of the upstream deflection absorbing movable belt roll 2b and the upstream deflection absorbing/guiding belt roll 2C. The conveyor belt portion between the contact point and the contact point is stretched horizontally, so that even if the movable block 7 moves horizontally, the upstream conveyor belt i does not slacken.

Similarly, the movable belt roll 4a for the downstream table is located at the upper part of the movable block 7 on the downstream side, and the movable belt roll 4b for taking up the downstream deflection is located at the upper part of the movable block 7.
Both belt rolls are positioned at the lower part of the upstream side, and the downstream movable belt roll 4b for taking up deflection is lower than the downstream table movable belt roll 4a by the height of one roll. 4a and 4b are supported at both ends by a pair of movable blocks 7 on both sides, and the belt roll 4c for downstream deflection and guide is located below the movable belt roll 4b for downstream deflection and is movable for the downstream table. It is provided at a predetermined position between the belt roll 4a and the movable belt roll 4b for removing deflection on the downstream side, with the shaft position being fixed. Then, the downstream conveyor belt 3
It is wound around the outer side of the downstream table movable belt roll 4a, the inner side of the downstream side deflection absorbing movable belt roll 4b, and the outer side of the downstream side deflection absorbing/guide belt roll 4C. Then, the conveyor belt portion between the belt contact point of the downstream table movable belt roll 4a and the belt contact point of the downstream deflection absorbing movable belt roll 4b is stretched horizontally, and Movable belt roll 4 for removing deflection on the downstream side
The conveyor belt section between the belt contact point b and the belt contact point of the upstream deflection absorbing and guiding belt roll 4C is stretched horizontally, so that the movable table 7
Even if the conveyor belt 3 moves horizontally, the downstream conveyor belt 3 does not slacken.

Next, one effect will be explained.

The movable block 7 is mounted on a movable table 6 that performs a reciprocating horizontal movement equal to the horizontal component of the box motion of the upper and lower heaters H1 and H2, and
, H2 is configured to move horizontally so as not to interfere with the lower heater H2 when it closes, and to close the gap between the heaters when the upper and lower heaters H1 and H2 open. , H2 approaches the upstream position of the box motion and closes, the movable belt roll 4a for the downstream table that closes the upper side of the lower heater H2 is moved so as not to interfere with the lower heater H2. It will be opened in

Next, when moving to the lower wave position of the box motion with the upper and lower heaters H1 and H2 closed, the movable belt roll 4a for the downstream table is moved to the lower heater H2.
It moves horizontally while remaining close to the skim side, and then reaches the downstream position of the box motion using the upper and lower heaters H1 and H2 and opens, moving the movable belt roll 4a for the downstream table. is closed immediately after the lower heater H2 is lowered so as not to interfere with the lower heater H2.

Subsequently, with the upper and lower heaters H1 and H2 open,
When moving to the upstream position of the box motion, the downstream table movable belt roll 4a moves horizontally while remaining close to the upstream table movable belt roll 2a.

In the above case, in the upstream conveyor section A, the distance between the axes of the upstream table movable belt roll 2a and the upstream deflection absorbing movable belt roll 2b does not change, and the upstream table movable belt roll 2a and the upstream table Since the structure is such that the change in the distance between the axes of the belt roll 2d for use as a guide is offset by the change in the distance between the axes of the downstream movable belt roll 2b for taking up deflection and the belt roll 2C for taking up deflection on the upstream side, the movable table 6 No matter where the upstream conveyor belt l is placed, the winding will not loosen.

Further, in the downstream conveyor section B, the distance between the axes of the movable belt roll 4a for the downstream table and the movable belt roll 4b for removing deflection does not change, and the movable belt roll 4a for the downstream table and the belt for the downstream table do not change. Changes in the distance between the axes of the rolls 4d, the movable belt roll 4b for taking up the downstream deflection, and the belt roll 4C for taking up the downstream deflection and guiding it.
Since the structure cancels out the change in the distance between the axes, the winding of the downstream conveyor belt 3 will not loosen no matter where the movable table 6 and the movable block 7 are located.

In order to match the horizontal movement of the horizontal component of the box motion of the upper and lower heaters H1 and H2, not only the lengths of the belt conveying surface of the upstream conveyor section A and the belt conveying surface of the downstream conveyor section B change respectively. Further, when the lower heater is in the lowered position, the gap between the upstream belt conveying surface and the downstream belt conveying surface is substantially eliminated.
The length of the belt conveying surface of the downstream conveyor section B changes, and the belt reversely feeds the product when a gap between the upstream conveyor section A and the downstream conveyor section B appears or disappears. This eliminates the accident of falling packages when packaging short items, small items, heavy items, etc.

[Second Embodiment/Φ/Figures 4 to 6] In this embodiment, only the points that are different from the first embodiment will be explained, and the same constituent members will be given the same reference numerals as in the first embodiment.

The belt conveyor of this embodiment includes an endless conveyor belt 9 made of wood, and the conveyor belt 9 detours below the lower heater H2 so as to be connected to the upstream and downstream sides of the lower heater H2. It has an upstream belt roll group 10, on which a conveyor belt 9 is stretched, to constitute an upstream conveyor A' and a downstream conveyor B', a downstream belt roll group 11, and a conveyor drive source 12.

The upstream belt roll group 10 includes an upstream table movable belt roll 10a whose axial position is movable in the horizontal direction, and an upstream table belt roll 10d whose axial position is fixed. conveyor belt 9
are stretched horizontally to form a conveying surface, and the movable belt roll 10b for taking up deflection on the upstream side is provided roughly below the two rolls, the shaft position of which can be freely moved in the direction of the water flow. An upstream deflection-removing/guiding belt roll 10c provided in a fixed position, an upstream guide belt roll 10e-11h, and a driving belt roll 10i.
There is.

Further, the downstream belt roll group 11 includes, at the upper part, a movable belt roll lla for the downstream table whose axial position is movable in the horizontal direction and a belt roll 11d for the downstream table whose axial position is fixed. A conveyor belt 9 is stretched horizontally to constitute a conveying surface, and a movable belt roll llb for taking up deflection on the downstream side is provided roughly below the two rolls so as to be movable in the horizontal direction. There are a belt roll llc for taking up deflection and guiding on the downstream side and belt rolls lie to l1g for upstream side guides, which are provided in fixed positions.

The guide belt rolls toe, 10f lie, and llf have the conveyor belt 9 stretched around the inner circumference below the lower heater H2.
Guide belt roll 10g.

11g, the conveyor belt 9 is stretched around the outer circumference below the lower heater H2, and the guide belt roll loh is such that the conveyor belt 9 is wound around the drive belt roll 10i so that the central angle is I'm trying to make it bigger.

The four movable belt rolls lOa and 10b.

11a and llb all have the same diameter. The interval between the upstream side deflection removing and guiding belt roll lOc and the downstream side deflection taking and guiding belt roll lie is set at a required interval so as not to interfere with the lower heater H2 that performs the box motion.

A motor serving as the conveyor driving source 12 is directly connected to the driving belt roll 10i.

Similarly to the first embodiment, the four movable belt rolls 10a, 10b, and lla.

11b, the upper and lower heaters H1 are connected by the movable table 6.
, H2, and the movable belt rolls lla, l
lb performs horizontal movement to adjust the length of the conveyor according to the opening and closing of the upper and lower heaters (1, H2) by horizontal movement of the movable block 7 so as not to interfere with the upper and lower heaters H1 and H2. I'm starting to get it.

In addition, the correlation between the movable belt rolls lOa, 10b and 10c is the same as that between the movable belt rolls 2a, 2b and 20 in FIG. 1, and the correlation between the movable belt rolls lla and tt.
The correlation between b and llc is the movable belt roll 4a in FIG.
and 4b and 40 are the same as the correlations.

Unfortunately, the belt conveyor is -t conveyor belt 9
The only feature is that the upstream conveyor A' and the downstream conveyor B° are constructed by detouring below the lower heater H2.

The operation is the same as that of the first embodiment described above, and will therefore be omitted.

[Peripheral scope of the present invention] (1) In the belt conveyor shown in FIG. 1, the upstream conveyor A and the downstream conveyor B may be driven by separate drive sources.

(2) As the movable block moving means 8, a linear actuator is attached to the upstream end of each movable table 6, and the operating ends of the pair of linear actuators are moved to the movable block 7.
The movable block 7 may be moved in conjunction with the opening and closing of the upper and lower heaters H1 and H2 by connecting the linear actuator to the linear actuator and expanding and contracting the linear actuator.

(3) As the movable block moving means 8, a binion is rotatably attached to each movable table 6 so that the axis position is fixed, and a horizontal rack is provided to the movable block 7 on each side so as to mesh with each binion. A vertical rack may be provided on either one of the upper and lower heaters H1 and H2 to engage the pair of binions so that the pair of horizontal racks can be mounted and moved horizontally.

(4) Movable block 7 as movable block moving means 8
A cam follower is provided in each of the upper and lower heaters H1, and a cam plate having a cam groove for guiding the cam follower is attached to the upper and lower heaters H1,
Attach to either side end of H2, and connect the upper and lower heaters H
1 and H2 open and close, the movable block 7 may be horizontally movable due to the guiding action of the cam plate on the cam follower.

[Effect of the Invention J As explained above, according to the belt conveyor for the box motion type heat-sealing device of the horizontal bag-forming-fill-sealing machine of the present invention, the downstream table is closer to the lower heater from the downstream side. The table belt roll on the upstream side, which is closer to the lower heater than on the upstream side, is supported so that the conveyor belt does not sag as a movable belt roll with a double slide structure. The belt roll is supported so that it becomes a movable belt roll with a sliding structure that does not sag.

The two table movable belt rolls that are close to the lower heater from the upstream and downstream sides, respectively, can not only perform horizontal movement equal to the horizontal component of the box motion of the upper and lower heaters, but also The movable belt roll moves away from the upstream table movable belt roll when the heater is open to avoid interference with the heater, and approaches when the heater is closed, making it a short product with a large weight.

Even if it is a small item, it may fall between the belt rolls or
It can pass smoothly between belt rolls without falling soot,
A horizontal bag-forming-fill-sealing machine suitable for packaging short items, small items, heavy items, etc. can be realized.

[Brief explanation of drawings]

Figures 1 to 3 relate to a first embodiment of a belt conveyor for a box motion type heat-sealing device of a horizontal bag-forming-fill-sealing machine of the present invention. Fig. 2 is a cross-sectional view showing a state in which the heater is extended to close the gap between it and the downstream conveyor, and Fig. 2 shows a state in which the heater moves to the upstream position and the upstream conveyor contracts to open the gap between it and the downstream conveyor. Fig. 3 is a cross-sectional view showing a state in which the upper and lower heaters are closed and horizontal sealing has started. FIG. 3 is a cross-sectional view showing a state in which it has been horizontally moved to a downstream position. 4 to 6 relate to a second embodiment of the belt conveyor for the box motion type heat-sealing device of the horizontal bag-forming-fill-sealing machine of the present invention, and FIG. 4 shows the upstream conveyor with the upper and lower heaters open. 5 is a cross-sectional view showing a state in which the heater is extended and closes the gap between it and the downstream conveyor, and FIG. Fig. 6 is a sectional view showing a state in which the upper and lower heaters are closed and horizontal sealing is started after the upper and lower heaters are closed, and the upstream conveyor is contracted and the gap between it and the downstream conveyor is left open. FIG. 3 is a cross-sectional view showing a state in which it has been horizontally moved to a downstream position. H1, H2...Upper and lower heaters F...Cylinder to be packaged, W...Fist to be packaged, A...φ upstream conveyor. BIII + fist downstream conveyor, 1...-1 stream side conveyor belt, 2. fist/upstream side belt roll group, 2a... movable belt roll for upstream table, 2b@
・Upstream side deflection removal movable belt roll, 20φ upstream side deflection removal and guide belt roll 3...Downstream conveyor belt, 4.e.Downstream belt roll group, 4a..Movable belt roll for downstream table. . 4b-φ・Movable belt roll for removing deflection on the downstream side, 4C
- Belt roll for downstream deflection and guide 5 - Conveyor drive source, 6 - φ movable table, 7 - Upstream side movable block, 8 - Movable block opening/closing means, 9 fists 1 conveyor belt, A '...Upstream conveyor, B'-Working ΦDownstream conveyor, lO...Bone upstream belt roll group, 1oan-Movable belt roll for upstream table, 10b
- Upstream side deflection-taking movable belt roll 10c...Upstream side deflection-taking and guide belt roll, 11-Slightly downstream side belt roll group, 11a...Downstream side table movable belt roll, 11b
・・Movable belt roll 11c for removing deflection on the downstream side...
Belt roll for downstream side deflection removal and guide, 12-...conveyor drive source, patent applicant Kawashima Seisakusho Co., Ltd.

Claims (1)

[Scope of Claims] The present invention can be incorporated on the upstream and downstream sides of a box motion type heat-melting sealing device of a horizontal bag-forming-fill-sealing machine that performs end sealing between packaged items in a packaging cylinder using upper and lower heaters, and When the lower heater rises, the horizontal movement of the movable table, which is provided across the sides of the upstream conveyor and the downstream conveyor and is horizontally movable along the conveyor transport direction, causes the movable belt roll for the upstream table and the downstream table to move horizontally. In a belt conveyor for a box-motion type heat-sealing device of a horizontal bag-forming-fill-sealing machine, the movable belt rolls move horizontally together with the lower heaters while remaining close to the lower heaters, A movable block provided on the movable table and horizontally movable along the conveyor conveyance direction independently of the movable table; and movable block moving means for horizontally moving the movable block; The side belt roll group includes a movable belt roll for the upstream table and a movable belt roll for upstream deflection that have equal roll diameters and are pivotally supported at the upper part near the center and the lower part near the upstream of the movable table, and the upstream deflection absorber. The upstream side deflection absorbing/guiding belt roll is provided below the upstream side table movable belt roll and the upstream side deflection absorbing movable belt roll with its shaft position fixed at a predetermined position. and the conveyor belt is wound around the outside of the upstream table belt roll, the inside of the upstream deflection-taking movable belt roll, and the outside of the upstream deflection-taking and guide belt roll. The downstream belt roll group constituting the downstream conveyor includes a movable belt roll for the downstream table and a downstream deflection absorbing belt roll having equal roll diameters, which are pivotally supported at the downstream upper part and the downstream lower part of the movable block. A downstream side which is provided below the movable belt roll and the movable belt roll for taking up downstream side deflection, and whose axis position is fixed at a predetermined position between the movable belt roll for the downstream side table and the movable belt roll for taking up downstream side deflection. The conveyor belt is configured to include a belt roll that serves as a deflection remover and a guide, and a conveyor belt is provided on the outside of the belt roll for the upstream side table, and inside the movable belt roll for downstream side deflection remover. The movable block moving means is wound around the outside of each guide belt roll, and the movable block moving means is configured such that when the upper and lower heaters are closed, the downstream table movable belt roll is separated from the upstream table movable belt roll. When the movable block is moved and opened by the upper and lower heaters, the movable block is moved so that the downstream table movable belt roll approaches the upstream table movable belt roll. A belt conveyor for a box motion type heat-melting sealing device of a horizontal bag-forming-filling-sealing machine, which is characterized by: