JPH0343305A - Belt conveyor for box motion type heating welding sealing device for horizontal bag making filling packaging - Google Patents

Abstract

PURPOSE:To make applicable for packaging of a short-sized article or small article, etc., by a method wherein the present belt conveyor is constituted in such a manner that the length of the carrying surface is changed so that the belt carrying surface almost completely fills a gap when a heater on the lower side for a heating welding sealing device has sunk. CONSTITUTION:Upper and lower heaters H1, H2 give a box motion, end a belt conveyor is divided into A and B on the upstream side and the downstream side, and belt roll groups 2 and 3, on which the conveyor belts 4, 5 are stretched, are equipped. A movable table 1, which is provided extending along the side edges of the conveyors on the upstream side and the downstream side, performs a horizontal motion which is equivalent to the horizontal component of a box motion of the heaters H1, H2. When the heaters H1, H2 perform a box motion, excepting at the times of lateral sealing and cutting, right after the heater H2 on the lower side has sunk, at least one of the belt rolls, which approach the upstream side and the downstream side of the heater, closes the top of the heater on the lower side, and thus the belt carrying surface almost completely fills the gap while changing the length of the carrying surface.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a product delivery conveyor in a horizontal form-fill-seal packaging machine such as a horizontal pillow packaging machine, and in particular to a belt conveyor incorporated in a box motion type heat-fusion sealing device.

[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 pair of upper and lower heaters that perform box motion. Here, to explain the operation of the box motion, the upper and lower pair of heaters are opened vertically and closed when aligned with the register mark on the wrapping paper at the upstream position.
It moves a predetermined distance in synchronization with the speed of the wrapping paper, opens up and down again at the downstream position, and returns to the upstream position, allowing more time to heat-seal the wrapping paper compared to a one-turn car or tar. It has its features.

There are various mechanisms for box motion of the pair of upper and lower heaters.For example, 1. In some cases, both ends of the upper and lower heaters are attached to connecting links of a double crank mechanism, or both ends of the upper and lower heaters are engaged with the front cam (groove cam), and the flat circular cam groove of the front cam is connected by the crank. There is one that has a structure in which it is rotated (for example, Japanese Utility Model Application No. 82-54910).

The box motion of the upper and lower heaters means that
On the upstream and downstream sides of the heater, conveyors are required that are close to the heater and whose speeds are synchronized to substantially change the table area. Both are still in use today. One is an endless roller conveyor, in which an endless conveyor chain is wound around the left and right pivots, and a large number of rollers are wound around the conveyor chain, and the number of rollers is thinned out at regular intervals. hand,
The structure is such that the heaters on the lower side protrude and retract from the space that has been thinned out.The other type is a belt conveyor, where the belt conveying surface is sunk in the middle with a gap, and the A conveyor belt is wound around the gap so that it moves back and forth, and the heater on the lower side protrudes and retracts from the gap.

Roller conveyors are difficult to assemble, make a lot of noise, and have gaps between the rollers, which may turn customers off. and escapes downward,
Even if the packaged item is a short item, small item, heavy item, or 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 do not actively feed the packaged items, so even though they can wrap short and small items, there is a limit to their size, and short items below a certain size However, when it comes to small items, there is also the problem that the packaged items may fall into gaps in the middle of the belt conveyance surface. Furthermore, depending on the type of packaged item, there is a risk of damaging the bottom surface.

[Problems to be Solved by the Invention] The present invention has a method of changing the length of the belt conveying surface so that when the lower heater of the heat-sealing device goes down, the belt conveying surface almost completely fills the gap. Due to short items, small items,
The object of the present invention is to provide a belt conveyor for a box motion type heat-melting sealing device of a horizontal bag-forming-filling-sealing machine that can be applied to packaging heavy items.

[Means and effects for solving the problem] The belt conveyor for the box motion type heat-fusion sealing device of the horizontal bag-forming-fill-sealing machine of the first invention of the present application has the following features: W,
It can be installed on the upstream and downstream sides of a box motion type heat-sealing device of a horizontal bag-making-fill-sealing machine that applies an end seal between W, and when the heater H2 on the lower side is raised, The horizontal movement of the movable table 1, which is provided across the side of the conveyor B and is horizontally movable along the conveyor transport direction, causes the movable belt roll 2a for the upstream table and the movable belt roll 3 for the downstream table.
a remain close to the lower heater H2,
For box motion type heating, fusing, and sealing devices of horizontal bag-forming-fill-sealing machines that perform a horizontal motion equal to the horizontal component of the heater's box motion and vary the length of the belt conveying surfaces on the upstream and downstream sides of the heater. The belt conveyor has an endless conveyor belt 4 constituting the upstream conveyor A, and the conveyor belt is adjusted in response to variations in the length of the upper U-side table movable belt roll 2a and the belt conveyance surface. an upstream belt roll group 2 that tensions the conveyor belt 4, and an endless conveyor belt 5 that constitutes the downstream conveyor B; , includes a deflection removing roll 3b that moves to tension the conveyor belt 5 in response to a change in the length of the belt conveyance surface, and a movable belt roll 3a for the downstream table, and tensions the conveyor belt 5. a conveyor drive source 6 that drives the upstream conveyor and the downstream conveyor independently or in common; an upstream movable block 7 that pivotally supports the upstream table movable belt roll 2a; and an upstream table movable belt roll 3a that is provided on the movable table l and is horizontally movable along the conveyance direction.
A movable block opening/closing means is attached to either the upper or lower heater H1, H2 or the movable table l and opens and closes the upstream movable block 7 and the downstream movable block 8. 9, and the movable block opening/closing means 9 includes the upper and lower heaters H1.
, H2 closes, the upstream movable block 7 is moved so that the upstream table movable belt roll 2a and the downstream table movable belt roll 3a are separated from each other.
When the downstream movable block 8 is moved and the upper and lower heaters H1 and H2 are opened, the upstream table movable belt roll 2a and the downstream table movable belt roll 3a are brought close to each other at the center of the heater. The upstream movable block 7 and the downstream movable block 8
It is characterized by being configured to move.

Explain the action.

An upstream movable block 7 and a downstream movable block 8 attached to the movable table 1 are connected to either the upper or lower heaters H1, H2 or the movable table l via a movable block opening/closing means 9, and the upstream movable block 7 Since the movable belt roll 2a for the upstream table and the movable belt roll 3a for the downstream table are respectively pivotally supported by the downstream movable block 8, the conveyor drive source 6 is turned on and the upper and lower heaters H1 and H2 are turned on. When the motion starts, the movable table 1, the upstream movable block 7, and the downstream movable block 8 perform a horizontal movement equal to the horizontal component of the box motion, and the conveyor belt 4.5 starts conveying in the same direction. The lengths of the belt conveyance surfaces on the upstream and downstream sides vary, and at this time, the deflection removing rolls 2b and 3b alternately move up and down, so that the conveyor belt 4.5 does not slacken.

Then, in the upstream movable blow 2 7 and the downstream movable block 8, the lower heater H2 rises at the upstream position of the box motion and moves to the downstream position while performing horizontal sealing in cooperation with the upper heater H1. The movable block opening/closing means 9 opens the movable belt roll 2a and the movable belt roll 3a for the downstream table until the movable belt roll 3a is opened to prevent interference with the lower heater H2. It can be avoided.

Subsequently, the upstream movable block 7 and the downstream movable block 8 are closed to each other by the movable block opening/closing means 9 until the upper and lower heaters H1 and H2 open at the downstream position of the box motion and return to the upstream position. Therefore, the movable belt roll 2a and the movable belt roll 3a for the downstream table close each other, and it is completely avoided that the packaged product falls between the belt conveyance surface on the upstream side and the belt conveyance surface on the downstream side. The belt can be transferred between both belt conveyance surfaces.

The belt conveyor for the box-moscicon type heat-melting sealing device of the horizontal bag-forming-filling-sealing machine of the second invention of the present application has the following features:
The present invention can be incorporated into both the upstream and downstream sides of a box motion type heat-sealing device of a horizontal bag-forming-fill-sealing machine that performs end sealing between W.

When the lower heater H2 rises, the movable belt for the upstream table is caused by the horizontal movement of the movable table 1, which is provided laterally across the upstream conveyor A and the downstream conveyor B and is horizontally movable along the conveyor conveyance direction. The roll 2a and the downstream table movable belt roll 3a are connected to the lower heater H2.
The port of the horizontal bag-fill-fill-seal machine is designed to move horizontally equal to the horizontal component of the heater's box motion run while remaining close to the In a belt conveyor for a 2-cus motion type heat-melting sealing device.

The upstream conveyor A includes an endless conveyor belt 4, and the conveyor belt 4 is stretched in response to changes in the lengths of the upstream table movable belt roll 2a and the belt conveyance surface. an upstream belt roll group 2 that tensions the conveyor belt 4 and includes a moving deflection removing roll 2b;

The downstream table movable belt roll 3a has an endless conveyor belt 5 constituting the downstream conveyor B and is pivotally supported by the movable table l.
and a deflection removing roll 3b that moves to tension the conveyor belt 5 in response to variations in the length of the belt conveying surface.
and a conveyor drive@6 that drives the upstream conveyor A and the downstream conveyor B independently or in common.

A movable belt roll 2a for the upstream table, which is provided on the movable table l and is horizontally movable along the conveying direction.
an upstream movable block 7 that pivotally supports the upstream movable block 7; and a movable block opening/closing means 9 that is attached to either the upper or lower heaters H1, H2 or the movable table l and opens and closes the upstream movable block 7; The opening/closing means 9 includes the upper and lower heaters H1.
, H2 is closed, the upstream movable block 2a is separated from the downstream table movable belt roll 3a to avoid interference with the lower heater H2 that rises. 7 and when the upper and lower heaters H1 and H2 open,
It is characterized in that the upstream side movable block 7 is moved so that the upstream table movable belt roll 2a approaches the downstream table movable belt roll 3a.

Explain the action.

The upstream movable block 7 attached to the movable table l is connected to either the upper or lower heater H1, H2 or the movable table l via the movable block opening/closing means 9, and the upstream movable block 7 is further connected to the movable block 7 for the upstream table. Since the belt roll 2a is pivoted or the movable belt roll 3a for the downstream table is pivoted on the movable table l, the conveyor attraction source 6 is turned on and the upper and lower heaters H1 and H2 start box motion. Then, the movable table 1 and the upstream movable block 7 perform a horizontal movement equal to the horizontal component of the box motion, and start conveying the conveyor belt 4.5 in the same direction, so that the belt conveying surfaces on the upstream and downstream sides of the heater The length of the conveyor belt 4.5 changes, and at this time, the slack-removing rolls 2b and 3b alternately move up and down, so that the conveyor belt 4.5 does not slacken.

The upstream movable block 7 is a lower heater H2.
rises at the upstream position of the box motion, performs horizontal sealing in cooperation with the upper heater H1, and moves to the downstream position until it descends.

The movable block opening/closing means 9 allows the movable belt rolls 2a to be opened and separated from the downstream table movable belt roll 3a, thereby avoiding interference with the lower heater H2.

Subsequently, the upstream side movable block 7 is closed to each other by the movable block opening/closing means 9 until the upper and lower heaters H1 and H2 open at the downstream position of the box motion and return to the upstream position, and therefore, The movable belt roll 2a for the upstream table is connected to the lower heater H2.
It moves so as to close the upper space and approaches the movable belt roll 3a for the downstream table, completely preventing the packaged product from falling between the belt conveying surface on the upstream side and the belt conveying surface on the downstream side. The belt can be moved between belt conveyance surfaces.

The belt conveyor for the box motion type heating, melting and sealing device of the horizontal bag-forming-filling-sealing machine of the third invention of the present application has the following features:
It can be installed on the upstream and downstream sides of a box motion type heat-sealing device of a horizontal bag-making-fill-sealing machine that applies an end seal between W, and when the heater H2 on the lower side is raised, The horizontal movement of the movable table 1, which is provided across the side of the conveyor B and is horizontally movable along the conveyor transport direction, causes the movable belt roll 2a for the upstream table and the movable belt roll 3 for the downstream table.
a moves horizontally equal to the horizontal component of the box motion of the heater while remaining close to the lower heater H2, and the lengths of the belt conveying surfaces on the upstream and downstream sides of the heater change. A belt conveyor for a box motion type heat-sealing device of a horizontal type bag-forming-fill-sealing machine has an endless conveyor belt 4 constituting the upstream conveyor A, and the belt conveyor belt 4 is rotatably supported by the movable table 1. The upstream table that tensions the conveyor belt 4 includes a movable belt roll 2a for the upstream table and a deflection removing roll 2b that moves to tension the conveyor belt 4 in response to changes in the length of the belt conveyance surface. With side belt roll group 2.

It has an endless conveyor belt 5 constituting the downstream conveyor A, and is configured to tension the conveyor belt 5 in response to variations in the length of the downstream table movable belt roll 3a and the belt conveyance surface. A conveyor drive source that drives the downstream belt roll group 3 including the moving deflection removing roll 3b and tensioning the conveyor belt 5, and the upstream conveyor A and the downstream conveyor B independently or in common. 6, a movable belt roll 3a for the downstream table, which is provided on the movable table 1 and is horizontally movable along the conveyance direction;
a downstream movable blow 2 8 that is pivotally supported; and a downstream movable blow that is attached to either the upper or lower heaters H1, H2 or the movable table 1.

The movable block opening/closing means 9 opens and closes the upper and lower heaters H1.
, H2 closes, the downstream movable block 8 is moved so that the movable belt roll 3a for the downstream table moves away from the movable belt roll 2a for the upstream table to avoid interference with the lower heater H2 that rises. move the
Further, when the upper and lower heaters H1 and H2 are opened, the downstream movable block 8 is moved so that the downstream table movable belt roll 3a approaches the upstream table movable belt roll 2a. It is characterized by the fact that

Explain the action.

A downstream movable block 8 attached to the movable table 1 is connected to either the upper or lower heater H1, H2 or the movable table l via a movable block opening/closing means 9, and is further connected to the downstream movable block 7 with a movable block for the downstream table. Since the belt roll 3a is pivotally supported, or the movable belt roll 2a for the upstream table is pivotally supported on the movable table 1, the conveyor drive source 6 is turned on, and the upper and lower heaters 1 (1, H2 perform box motion). When starting, the movable table 1 and the downstream movable block 8 perform a horizontal movement equal to the horizontal component of the box motion, and the conveyor belt 4.5 starts conveying in the same direction, and the belt conveyance on the upstream and downstream sides of the heater starts. The length of the surface fluctuates, and at this time, the deflection absorbing rolls 2b, 3b alternately move up and down, so that the conveyor belt 4.5 does not slacken.

The downstream movable block 8 is a lower heater H2.
The movable block opening/closing means 9 keeps them open from each other until they rise at the upstream position of the box motion and move to the downstream position while performing lateral sealing together with the upper heater H1 and descend. The movable belt roll 2a is separated from the downstream table movable belt roll 3a in the open state, thereby avoiding interference with the lower heater H2.

Subsequently, the downstream side movable block 8 is kept closed to each other by the movable block opening/closing means 9 until the upper and lower heaters H1 and H2 open at the downstream position of the box motion and return to the upstream position. Therefore, the downstream table movable belt roll 3a is connected to the lower heater H.
2 to close the upper space of the upstream table movable belt roll 2a, completely preventing the package from falling between the upstream belt conveying surface and the downstream belt conveying surface. It is possible to transfer between both belt conveying surfaces.

[Embodiment of the first invention... Figures 1 to 3 1 This belt conveyor can be incorporated across the upstream and downstream sides of a box motion type heat-sealing device of a horizontal bag-forming-fill-sealing machine, In this heat-fusion sealing device, the upper and lower heaters H1 and H2 perform a box motion shown in the locus curves XI and X2 to apply an end seal in two horizontal strips between the packaged items W and W in the packaged cylinder F. This is a cutter that protrudes after the upper and lower heaters H1 and H2 are combined and cuts between the two end seals.

This belt conveyor is configured separately into an upstream conveyor A and a downstream conveyor B, which share a common driving source. The upstream conveyor A includes an endless conveyor belt 4,
The downstream conveyor B includes an endless conveyor belt 5 and a downstream belt roll group 3 that stretches the conveyor belt 5. It will be done. The upstream belt roll group 2 is a movable belt roll 2a for the upstream table.
The belt conveying surface is stretched by the fixed belt roll 2C for the upstream table, and the guide roll 2d, which is located at a slightly lower position approximately midway between the belt rolls 2a and 20, is placed on the conveyor belt 4 so that it does not interfere with the lower heater H2. Furthermore, the tension of the conveyor belt 4 is maintained by lifting the deflection removing roll 2b located above between the two guide rolls 2f and 20 provided at the lower part by the swing arm 10. Similarly, the downstream belt roll group 3 has a belt conveying surface stretched between a movable belt roll 3a for the downstream table and a fixed belt roll 3C for the downstream table, and is located at a slightly lower position approximately midway between the belt rolls 3a and 30. The guide roll 3d located at the bottom allows the conveyor belt 5 to escape so as not to interfere with the lower heater H2, and furthermore, the deflection removing roll 3b located above is swung between the two guide rolls 3f and 3e provided at the bottom. The tension of the conveyor belt 5 is maintained by lifting it with an arm 11. Swing arms 10 and 11 are each supported so as to be lifted by a spring 12. The conveyor drive [6 is composed of a motor 6a, sprockets 6b to 6g, and endless chains 6h to 6j. When the motor 6a is turned on, it rotates the belt rolls 2c, 3c, and the conveyor belt 4.5
are transported in the same direction.

When the lower heater H2 rises, the upstream table movable belt roll 2a that is closer to the lower heater H2 from the upstream side is pivotally supported by the downstream end of the upstream movable block 7, and The movable belt roll 3a for the downstream table, which is closer to the lower heater H2 from the downstream side, is pivotally supported by the upstream end of the downstream movable block 8.

The movable table 1 is slidably fitted to both the horizontal guide 13 and a pivot guide (not shown) provided upright at the end of the heater block HB, and is slidably fitted to both the horizontal guide 13 and a pivot guide (not shown) provided upright at the end of the heater block HB.
A reciprocating horizontal motion equal to the horizontal component of the box motion of H2 can be performed.

Both sides of the lower heater H2 and the upstream movable block 7 and downstream movable block 8 on each side are connected by a movable block opening/closing means 9, and the upper and lower heaters H1
, H2, the two movable blocks 7.8 can move toward and away from each other.

The movable block opening/closing means 9 has a pair of links 9a and 9b whose one end is pivotally connected to the upstream movable block 7 or the downstream movable block 8, and an elongated hole 91 having a required length extending in the vertical direction. The elongated hole guide bodies 9c and 9d are adapted to engage and guide the other end of the link 9a or 9b in the elongated hole 91, and are fixed to the side ends of the heater block HB.

The movable block opening/closing means 9 includes upper and lower heaters H1, H
2 opens, when the lower heater H2 descends so as not to interfere with the upstream table movable belt roll 2a and the downstream table movable belt roll 3a, the pair of links 9a and 9b are connected to the upstream movable block. 7 and the downstream side movable block 8 to bring them closer together, so that the upstream table movable belt roll 2a and the downstream table movable belt roll 3a are brought close to each other and connected to the upstream conveyor A. The gap with the downstream conveyor B can be substantially eliminated.

The movable block opening/closing means 9 also includes upper and lower heaters H.
1, H2 is closed, the pair of links 9a and 9b are stretched against the upstream movable block 7 and the downstream movable block 8 to separate them from each other, and the lower Before the heater H2 on the side rises, the movable belt roll 2a for the upstream table and the movable belt roll 3a on the downstream side are separated from each other so that a gap can be secured again between the upstream conveyor A and the downstream conveyor B. It has become. In FIG. 1, the heaters H1 and H2 are open, and the belt rolls 2a and 3a are close to each other to close the upper part of the lower heater H2, which is sunk below the table surface. 3b
is located between the lowered position and the raised position, indicating a state in which the packaged items W are transferred from the upstream conveyor A to the downstream conveyor B. After this state, the heaters H1 and H2 will move upstream by box motion and approach each other, and at this time, the conveyance surface of the upstream conveyor A becomes shorter, and the conveyance surface of the downstream conveyor B becomes shorter. Because it will be long.

The slack removing roll 2b rises, and the slack removing roll 3b
are lowered to respectively adjust the length of the conveyor belt 4.5. Further, the belt rolls 2a and 3a are spaced apart from each other so as to avoid interference with the rising lower heater H1 as much as possible, and to be as close to each other as possible with the lower heater H1 in between, Thereafter, the heaters H1 and H2 are closed to horizontally seal between the items W and W in the packaging tube F, and the cutter K built into the upper heater H1 is aligned with the registration mark between the items W and W. Accordingly, the packaged tube F is cut, resulting in the state shown in FIG. 2.

Next, the heaters H1 and H2 are closed and horizontally moved downstream, and at the same time, the belt rolls 2a and 3a adjacent to both sides of the heater H2 are also horizontally moved integrally. At this time, the conveyance surface of the upstream conveyor A becomes longer,
Since the conveyance surface of the downstream conveyor B becomes shorter, the slack-removing roll 2b descends and the slack-removing roll 3b rises to adjust the lengths of the conveyor belts 4 and 5, respectively, resulting in the state shown in FIG. becomes. Next, heater H
1 and H2 move upstream due to box motion and move away from each other when they reach the downstream side, and the belt rolls 2a and 3a approach each other, and at this time, the conveyance of the upstream conveyor A The conveying surface of the downstream conveyor B changes to a longer length, and returns to the state shown in FIG. 1 in which the heaters H1 and H2 are opened to the maximum.

As described above, when the heaters H1 and H2 open and move upstream, the gap between the upstream conveyor A and the downstream conveyor B is closed, and then one packaged object W passes between the heaters H1 and H2. Therefore, even if the object W to be packaged is a short item or a small item with a large weight, the belt rolls 2a and 3a
It can be passed easily without falling or falling.

[Embodiment of the second invention...FIGS. 4 to 6. The same components as those in the embodiment of the first invention will be given the same reference numerals, and only the different parts will be explained.

The movable block 8 of the embodiment of the first invention is not provided, and therefore, when the lower heater H2 rises, the downstream table movable belt roll 3a approaches the lower heater H2 from the downstream side. is pivotally supported by a movable table l.

The left side of the lower heater H2 and the upstream movable block 7 are connected by a movable block opening/closing means 9, and the movable block 7 can freely approach and separate in conjunction with opening and closing of the upper and lower heaters H1 and H2.

The movable block opening/closing means 9 has a link 9a whose one end is pivotally connected to the upstream movable block 7, and a long hole 91 having a required length in the vertical direction, and the other end of the link 9a is inserted into the long hole 91. It is designed to engage and guide the heater block I (B) and consists of a long hole guide body 9c fixed to the side end of the heater block I (B).

The movable block opening/closing means 9 includes upper and lower heaters H1, H
2 opens, when the lower heater H2 descends so as not to interfere with the upstream table movable belt roll 2a, the links 9a pull the upstream movable blocks 7 and approach the downstream movable block 8. Thus, the gap between the upstream conveyor A and the downstream conveyor B can be substantially eliminated.

The movable block opening/closing means 9 also includes upper and lower heaters H.
1. When H2 closes, link 9a is
is stretched against the upstream movable block 7, separating the upstream movable block 7 from the downstream movable block 8, so that a gap can be secured again between the upstream conveyor A and the downstream conveyor B. .

In FIG. 4, the heaters H1 and H2 are open, and the belt roll 2a closes the upper part of the lower heater H2, which is close to the belt roll 3a and sunk below the table surface, and furthermore, the slack removing roll 2b is closed. and 3b are located between the lowered position and the raised position, and the packaged items W are placed on the upstream conveyor A.
This shows a state where the conveyor B is transferred to a more downstream side conveyor B. After this state, the heaters H1 and H2 will move upstream by box motion and approach each other, and at this time, the conveyance surface of the upstream conveyor A becomes shorter, and the conveyance surface of the downstream conveyor B becomes shorter. Since the length of the conveyor belt 4.5 is increased, the slack removing roll 2b is raised and the slack removing roll 3b is lowered to adjust the length of the conveyor belt 4.5. Further, the belt roll 2a is separated so as to avoid interference with the rising lower heater H1 as much as possible, and then the heaters H1 and H2 are closed to separate the objects W and W in the cylinder F. At the same time, the cutter K incorporated in the upper heater H1 seals the packaged items W, W.
The packaged cylinder F is cut in accordance with the registration marks between the two, resulting in the state shown in FIG.

Next, the heaters H1 and H2 are closed and horizontally moved downstream, and at the same time, the belt rolls 2a adjacent to both sides of the heater H2 are also horizontally moved together. The conveyance surface of upstream conveyor A is longer, and the conveyor surface of downstream conveyor B is longer.
Since the conveying surface becomes shorter, the slack removing roll 2b is lowered and the slack removing roll 3b is raised to adjust the length of the conveyor belt 4.5, resulting in the state shown in FIG. 6. Subsequently, when the heaters H1 and H2 reach the downstream side, they open each other while moving upstream by the box movement, and the belt roll 2a approaches the belt roll 3a so as to close the gap between the heaters. become. At this time, the conveying surface of the upstream conveyor A changes to a shorter length, and the conveying surface of the downstream conveyor B changes to a longer length, returning to the state shown in FIG. 4 in which the heaters H1 and H2 are opened to the maximum.

As described above, when the heaters H1 and H2 open and move upstream, the gap between the upstream conveyor A and the downstream conveyor B is closed, and then one packaged object W passes between the heaters H1 and H2. do.

[Embodiment of the third invention...Figures 7 to 9] In this embodiment, the same components as in the embodiment of the first invention are given the same reference numerals, and only the different parts will be explained. shall be.

The movable block 7 of the embodiment of the first invention is not provided, and therefore, when the lower heater H2 rises, the downstream table movable belt roll 2a approaches the lower heater H2 from the downstream side. is pivotally supported by a movable table l.

The right side of the lower heater H2 and the downstream movable block 8 are connected by a movable block opening/closing means 9, and the downstream movable block 8 can freely approach and separate in conjunction with the opening and closing of the upper and lower heaters H1 and H2. There is.

The movable block opening/closing means 9 has one end connected to the downstream movable block o.
The link 9b is pivotally attached to the +7 axis 8, and has an elongated hole 91 having a required length in the vertical direction, and the other end of the link 9b is engaged and guided in the elongated hole 91, and the heater It consists of a long hole guide body 9d fixed to the side end of the block HB.

The movable block opening/closing means 9 includes upper and lower heaters (1,
When H2 opens, the link 9b pulls the downstream movable block 8 and approaches the upstream movable block 7 when the lower heater H2 descends so as not to interfere with the downstream table movable belt roll 3a. Thus, the gap between the upstream conveyor A and the downstream conveyor B can be substantially eliminated.

The movable block opening/closing means 9 also includes upper and lower heaters H.
1. When H2 closes, link 9b
is stretched against the downstream movable block 8, separating the downstream movable block 8 from the upstream movable block 7, so that a gap can be secured again between the upstream conveyor A and the downstream conveyor B. .

In FIG. 7, the heaters H1 and H2 are open, and the belt roll 3a closes the upper part of the lower heater H2, which is close to the belt roll 2a and sunk below the table surface, and furthermore, the slack removing roll 2b is closed. and 3b are located between the lowered position and the raised position, and the packaged items W are placed on the upstream conveyor A.
This shows a state where the conveyor B is transferred to a more downstream side conveyor B. After this state, the heaters H1 and H2 will move upstream by box motion and approach each other, and at this time, the conveyance surface of the upstream conveyor A becomes shorter, and the conveyance surface of the downstream conveyor B becomes shorter. Since the length of the conveyor belts 4 and 5 is increased, the slack-removing roll 2b is raised and the slack-removing roll 3b is lowered to adjust the lengths of the conveyor belts 4 and 5, respectively. Moreover, the belt roll 3a is separated so as to avoid interference with the rising lower heater H1 as much as possible, and then the heaters H1 and H2 are closed to separate the objects W and W in the cylinder F. At the same time, the cutter K incorporated in the upper heater H1 seals the packaged items W, W.
The packaged tube F is cut in accordance with the registration marks between the two, resulting in the state shown in FIG. 8.

Next, the heaters H1 and H2 are closed and horizontally moved downstream, and at the same time, the belt roll 3a, which is closer to the heater H2 from the downstream side, is also horizontally moved integrally. Since the conveyance surface of the upstream conveyor A becomes longer and the conveyance surface of the downstream conveyor B becomes shorter, the slack removal roll 2b descends and the slack Iul roll 3b ascends to adjust the length of the conveyor belt 4.5. The 9th
The state shown in the figure will be reached. Next, heaters H1 and H2 are
When they reach the downstream side, they move toward the upstream side due to the box motion and open up from each other, and the belt roll 3a approaches the belt roll 2a so as to close the gap between the heaters. At this time, the conveying surface of the upstream conveyor A changes to a shorter length, and the conveying surface of the downstream conveyor B changes to a longer length, returning to the state shown in FIG. 7 in which the heaters H1 and H2 are opened to the maximum.

As described above, when the heaters H1 and H2 open and move upstream, the gap between the upstream conveyor A and the downstream conveyor B is closed, and then one packaged object W passes between the heaters H1 and H2. do.

[Peripheral Scope of the Present Invention] The movable block opening/closing means 9 may be an air-driven or electromagnetic-driven linear actuator connected at one end to the movable table 1 and at the other end to the movable block 7.8.

[Effects of the Invention] As explained above, according to the belt conveyor for the box motion type heat-melting sealing device of the horizontal bag-forming-fill-sealing machine of the present invention.

When the heater performs a box motion, except during horizontal sealing and cutting, immediately after the lower heater is submerged, at least one of the belt rolls adjacent to the upstream and downstream sides of the heater closes the upper part of the lower heater. Since the length of the conveying surface is changed so that the belt conveying surface almost completely fills the gap, even when short or small articles with large weights, there is no possibility that they will fall between the belt rolls or fall. It is possible to realize a horizontal bag-forming-fill-sealing machine that can pass smoothly between belt rolls without having to do so, and is suitable for packaging short items, small items, heavy items, etc.

[Brief explanation of drawings]

1 to 3 relate to an embodiment of a belt conveyor for a box motion type heating and fusing device of a horizontal bag-forming-filling-sealing machine according to the first invention of the present application, in which FIG. Fig. 2 is a sectional view showing a state in which the heater is opened to the maximum while moving upstream by box motion, and the upper part of the lower heater is closed, with the two movable belt rolls sunk downward; Fig. 3 is a cross-sectional view showing a state in which the heaters move upstream and close due to box motion, and approach each other with the lower heater sandwiched in between. FIG. 4 is a cross-sectional view showing a state in which the movable belt rolls have been moved and the two movable belt rolls have also moved while remaining close to each other with the lower heater in between. 4 to 6 relate to an embodiment of a belt conveyor for a box motion type heat-sealing device of a horizontal bag-forming-filling-sealing machine according to the second invention of the present application, and FIG. 4 shows that the upper and lower heaters are Fig. 5 is a sectional view showing a state in which the upper part of the lower heater is opened to the maximum while moving upstream by box motion and the two movable belt rolls are sunk downward; Fig. 6 is a cross-sectional view showing a state in which the heater moves upstream by box motion and closes, and the two movable belt rolls open and approach each other across the rising lower heater. The heater moves downstream while remaining closed due to the box motion. Also, it is a sectional view showing a state in which the two movable belt rolls are moved close to each other with the lower heater in between. 7 to 9 relate to an embodiment of a belt conveyor for a box motion type heat-sealing device of a horizontal bag-forming-fill-sealing machine according to the first invention of the present application, and FIG. FIG. 8 is a sectional view showing a state in which the lower heater is opened to the maximum while moving upstream by box motion, and the upper part of the lower heater is closed with two movable belt rolls sunk downward; FIG. FIG. 9 is a sectional view showing a state in which the heater moves upstream and closes due to box motion, and the two movable belt rolls open and approach each other across the rising lower heater; FIG. The heater moves downstream while remaining closed due to the box motion. Also, it is a sectional view showing a state in which the two movable belt rolls are moved close to each other with the lower heater in between. Hl...Upper heater Hl...Lower heater F...Cylinder to be packaged, W...Object to be packaged, A...Upstream conveyor, B...Downstream conveyor, 1... - Movable table, 2... Upstream belt roll group, 2a... Movable belt roll for upstream table, 2b.
... Deflection roll, 3... Downstream belt roll group. 3a... Movable belt roll for downstream table, 3b...
... Deflection roll, 4.5... Conveyor belt, 6... Conveyor drive source. 7... Upstream movable block, 8... Downstream movable block, 9... Movable block opening/closing means.

Claims (3)

[Claims] (1) It can be installed on the upstream and downstream sides of a box motion type heat-sealing device of a horizontal bag-forming-fill-sealing machine that uses upper and lower heaters to end-seal between items to be packaged in a tube to be packaged; When the 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 movable belt roll for the downstream table. The belt rolls move horizontally equal to the horizontal component of the box motion of the heaters while remaining close to the lower heaters, so that the lengths of the belt conveying surfaces on the upstream and downstream sides of the heaters vary. A belt conveyor for a box motion type heat-melting sealing device of a horizontal bag-forming-fill-sealing machine has an endless conveyor belt constituting the upstream conveyor, and a movable belt roll for the upstream table and a belt conveyor for the belt conveying surface. an upstream belt roll group that tensions the conveyor belt and includes a deflection removing roll that moves to stretch the conveyor belt in response to changes in length; and an endless belt roll that constitutes the downstream conveyor. It has a conveyor belt, and includes a deflection removing roll that moves to tension the conveyor belt in response to a change in the length of the belt conveyance surface, and a movable belt roll for the downstream table, and tensions the conveyor belt. a conveyor drive source that drives the upstream conveyor and the downstream conveyor independently or in common; an upstream movable block that pivotally supports the movable belt roll for the side table; and a downstream movable block that is provided on the movable table and is horizontally movable along the conveyance direction and that pivotally supports the movable belt roll for the upstream table. It consists of a movable block and a movable block opening/closing means that is attached to either the upper or lower heater H1, H2 or the movable table and opens and closes the upstream movable block and the downstream movable block; When the heaters close, the upstream movable block and the downstream movable block are moved so that the upstream table movable belt roll and the downstream table movable belt roll are separated from each other, and the upper and lower heaters are closed. When the opens,
A horizontal type characterized in that the upstream side movable block and the downstream side movable block are moved so that the upstream table movable belt roll and the downstream table movable belt roll are close to each other at the center of the heater. Belt conveyor for box motion type heating, welding, and sealing equipment for bag making, filling, and packaging machines. (2) It can be installed on both the upstream and downstream sides of a box motion type heat-sealing device of a horizontal bag-forming-fill-sealing machine that performs an end seal between the packaged items in a packaging cylinder using upper and lower heaters, and When the 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 movable belt roll for the downstream table. The belt rolls move horizontally equal to the horizontal component of the box motion of the heaters while remaining close to the lower heaters, so that the lengths of the belt conveying surfaces on the upstream and downstream sides of the heaters vary. A belt conveyor for a box motion type heat-melting sealing device of a horizontal bag-forming-fill-sealing machine has an endless conveyor belt constituting the upstream conveyor, and a movable belt roll for the upstream table and a belt conveyor for the belt conveying surface. an upstream belt roll group that tensions the conveyor belt and includes a deflection removing roll that moves to stretch the conveyor belt in response to changes in length; and an endless belt roll that constitutes the downstream conveyor. The movable belt roll for the downstream table is provided with a conveyor belt, and is pivotally supported by the movable table, and a deflection absorbing roll that moves to tension the conveyor belt in response to changes in the length of the belt conveyance surface. a downstream belt roll group that tensions the conveyor belt; a conveyor drive source that drives the upstream conveyor and the downstream conveyor independently or in common; an upstream movable block that is horizontally movable and pivotally supports the movable belt roll for the upstream table, and a movable block opening/closing means that is attached to either the upper or lower heater or the movable table and opens and closes the upstream movable block. The movable block opening/closing means is configured such that when the upper and lower heaters are closed, the movable belt roll for the upstream table rises apart from the movable belt roll for the downstream table and interferes with the lower heater. When the upper and lower heaters are opened, the upstream movable block is moved so that the upstream table movable belt roll approaches the downstream table movable belt roll. A belt conveyor for a box motion type heat-melting-sealing device of a horizontal bag-forming-filling-sealing machine, characterized in that it is configured to move blocks. (3) It can be installed 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 an end seal between the packaged items in the packaging tube using the upper and lower heaters, and When the 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 movable belt roll for the downstream table. The belt rolls move horizontally equal to the horizontal component of the box motion of the heaters while remaining close to the lower heaters, so that the lengths of the belt conveying surfaces on the upstream and downstream sides of the heaters vary. A belt conveyor for a box motion type heat-fusion sealing device of a horizontal bag-forming-fill-sealing machine has an endless conveyor belt constituting the upstream conveyor, and a movable conveyor belt for the upstream table that is pivotally supported by the movable table. an upstream belt roll group that tensions the conveyor belt and includes a belt roll and a deflection roll that moves to tension the conveyor belt in response to changes in the length of the belt conveying surface; and an upstream belt roll group that tensions the conveyor belt; It has an endless conveyor belt constituting the conveyor, and also includes a movable belt roll for the downstream table and a deflection removing roll that moves to tension the conveyor belt in response to changes in the length of the belt conveying surface. a group of downstream belt rolls that tension the conveyor belt; a conveyor drive source that drives the upstream conveyor and the downstream conveyor independently or in common; a downstream movable block that is horizontally movable and pivotally supports the movable belt roll for the downstream table, and a movable block opening/closing means that is attached to either the upper or lower heater or the movable table and opens and closes the downstream movable block. The movable block opening/closing means is configured such that when the upper and lower heaters are closed, the movable belt roll for the downstream table rises apart from the movable belt roll for the upstream table and interferes with the lower heater. When the upper and lower heaters are opened, the downstream 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, characterized in that it is configured to move blocks.