JPH07110644B2 - Box conveyor for horizontal bag-making filling / packing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a product unloading conveyor in a horizontal bag-making filling and packaging machine such as a horizontal pillow packaging machine, and more particularly to a belt conveyor incorporated in a box motion type heat fusion cutting and sealing apparatus.

[Prior Art and Problems Thereof] First, an outline of a conventional box motion type heat fusing and sealing apparatus of a horizontal bag-making filling and packaging machine will be described. In this device, a pair of upper and lower heaters perform box motion. Here, the operation of the box motion will be explained. With the pair of upper and lower heaters opened vertically, the heater is closed at the upstream position by being aligned with the registration mark of the wrapping paper.
It is a movement that 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, and has the characteristic that it takes more time to heat seal the wrapping paper than the rotary cutter. is there.

There are various mechanisms for performing a box motion by a pair of upper and lower heaters. For example, a structure in which 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 connected to a front cam (groove). There is a structure (for example, Japanese Utility Model Laid-Open No. 62-54910) in which a flat circular cam groove of a front cam is rotated by a crank while engaging with a cam.

The box motion of the upper and lower heaters means
On the upstream side and the downstream side of the heater, there is a need for a conveyor in which the table area is changed substantially in close proximity to the heater and in speed synchronization, and there are two types of conveyors which have a particular structure in the past. Yes, both are still in use. One is an endless roller conveyor, that is, by winding an endless transport chain vertically to the left and right, and wrapping a number of rollers on the transport chain, and thinning the roller wrapping at regular intervals. ,
From the thinned space, the heater on the lower side is projected and retracted, and the other one is a belt conveyor, in which the middle part of the belt transport surface is dropped into a state in which a gap is opened, and The structure is such that the conveyor belt is wound so that the gap moves back and forth, and the heater below the gap is projected and retracted.

The roller conveyor is cumbersome to assemble, generates a lot of noise, and there may be gaps between customers due to gaps between the rollers.However, the thinning space where the rollers are not suspended extends to the downstream end. Run away downwards,
Even if the packaged product is a short product, a small product, a heavy product, or a bulk product, the packaged product does not drop from the portion where the roller is not provided.

On the other hand, the belt conveyor operates quietly, but if the package is small, the package separated to the table surface on the downstream side when the lower heater is immersed in the gap in the middle of the belt transport surface. Since it has a problem of falling, it cannot be applied to the packaging of small articles. Therefore, there is a device in which when the lower heater is sunk from the table surface, the gap in the middle of the belt conveying surface is closed so that the heater can be applied to the packaging of small articles (Japanese Utility Model Publication No. 49-28133).

However, according to this invention, when operating at high speed, the lower heater rises faster, and the lower heater strongly repels the small roller that closes the gap in the middle of the belt conveying surface. Small rollers have low durability and require short-term replacement. It also becomes a source of noise. Further, since the small roller does not actively feed the packaged product, there is a limit to the size even if it can be used to package short products and small products. However, when it comes to small articles, there is still a problem that the packaged article falls into a gap in the middle of the belt conveying surface. Furthermore, the bottom surface may be damaged depending on the type of the packaged object.

[Problems to be Solved by the Invention] The present invention, by changing the length of the conveying surface so that the belt conveying surface almost completely fills the gap when the heater on the lower side of the heat fusing and sealing apparatus is submerged, It is an object of the present invention to provide a belt conveyor for a box motion type heat fusing and sealing apparatus of a horizontal bag-making filling and packaging machine that can be applied to packaging of short surfaces, small articles, heavy articles and the like.

The present invention also relates to Japanese Patent Application No. 62-
The purpose is to supplement the technical scope that has leaked from the scope of rights of No. 289115.

[Means for Solving the Problem] The belt conveyor for the box motion type heat fusing and sealing apparatus of the horizontal bag-making filling and packaging machine according to the present invention is provided with the upper and lower heaters H1 and H2 between the articles W and W to be packaged in the tube F to be packaged. A belt conveyor that can be installed over the upstream and downstream sides of the box motion type heating, melting, and sealing equipment of a horizontal bag-making filling and packaging machine that applies end seals to the upstream table that is closer to the downstream heater H2 than the upstream side. The movable belt roll 2a for the downstream table, which is closer to the belt roll 1a and the lower heater H2 from the downstream side, is provided on both sides in the end direction of either one of the upper and lower heaters H1 and H2 and moves horizontally in the conveyor transport direction. It is supported by a freely movable block 3 and performs horizontal movement equal to the horizontal component of the box motion of the heater to change the length of the belt conveying surface on the upstream side and the downstream side of the heater. A belt conveyor that is designed to move has endless conveyor belts 4 and 5 separated upstream and downstream of a heater, and the conveyor belt 4 corresponds to fluctuations in the length of the belt conveying surface. 5 is configured to be separated into an upstream conveyor C1 and a downstream conveyor C2 having flexure removing rolls 1d and 2d that always move so that the upstream table movable belt roll 1a and the downstream table are One or both of the movable belt rolls 2a for use are pivotally supported by the swing levers 6 and 7 pivotally supported by the movable block 3 and are integrally provided with either one of the upper and lower heaters H1 and H2. Cam plate 8 engaged with the swing levers 6 and 7
When the lower heater H2 is lowered by the guiding action of
It is characterized in that the upper side of the lower heater H2 is closed.

[Operation] When the heaters H1 and H2 make a box motion, the movable block 3 makes a reciprocating horizontal motion equal to its horizontal component in synchronization with the box motion, and at the side where the cam plate 8 is integrally provided. Performs box motion integrally with the heater H2. Then, when the heater H2 on the lower side descends, the belt rolls 4 and 5 come close to each other, and the gap between the upstream conveyor C1 and the downstream conveyor C2 becomes small,
One packaged object W passes through. Since the belt rolls 4 and 5 close the upper side of the heater 2 on the lower side, even if the object W to be packaged is a short product or a small product having a large weight, it can be dropped or dropped in the gap between the conveyors. It can pass well without passing through.

[Embodiment ... Figs. 1 to 3] This belt conveyor can be incorporated over the upstream side and the downstream side of the box motion type heat fusing and sealing apparatus of a horizontal bag-making filling and packaging machine. In the apparatus, upper and lower heaters H1 and H2 perform box motions indicated by locus curves X1 and X2, and end seals are provided between two articles W to be packaged in a tube F to be packaged. Reference numeral K is a cutter, which 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 by being separated into an upstream conveyor C1 and a downstream conveyor C2, and the drive source is common. The upstream conveyor C1 is an endless conveyor belt 4,
The upstream side belt roll group 1 stretching the conveyor belt 4 is provided, and the downstream side conveyor C2 has an endless conveyor belt 5 and the downstream belt roll group 2 stretching the conveyor belt 5. I will do it. The upstream belt roll group 1 is a movable belt roll 1a for the upstream table.
And the upstream table fixed belt roll 1f stretches the belt conveying surface, and the guide roll 1b at a position slightly lower than the intermediate position between the belt rolls 1a and 1f does not interfere with the lower heater H2 and the conveyor belt 4 Further, the flexure removing roll 1d located above between the two guide rolls 1c and 1e provided at the lower part is lifted by the swing arm 9 to keep the tension of the conveyor belt 5. Similarly,
The downstream belt roll group 2 has a belt conveying surface stretched by a movable belt roll 2a for the downstream table and a fixed belt roll 2f for the downstream table, and is located at a slightly lower position between the belt rolls 2a and 2f. The conveyor belt 5 is released so that the roll 2b does not interfere with the heater H2 on the lower side, and the two guide rolls 1c and 1e provided below
The flexure removing roll 2d located above between the two is lifted by the swing arm 10 to keep the tension of the conveyor belt 5. The swing arms 9 and 10 are elastically held by springs 11, respectively. The conveyor drive source is
Motor 12 and sprockets 13-18 and endless chain
It consists of 19-21.

Movable belt roll 1a for the upstream table and a movable belt roll 2a for the downstream table, which are closer to the lower heater H2 than the downstream side and closer to the upstream side, are provided on both sides in the end direction of the lower heater H2. Pin axis halfway to movable block 3
It is pivotally supported on the upper ends of swing levers 6, 7 pivotally supported by 22, 23. The movable block 3 is slidably fitted to both the horizontal guide 24 and a vertical guide (not shown) provided upright at the end of the heater block HB. Therefore, the movable block 3 can perform the reciprocating horizontal motion equal to the horizontal component of the box motion of the upper and lower heaters H1 and H2.

A pair of cam plates 8 are provided integrally with the lower heater H2 at both ends in the end direction of the lower heater H2. The cam grooves 8a and 8b of the cam plate 8 connect a lower parallel portion in which a distance between them is kept small, an upper parallel portion in which a distance between them is wide, and a lower parallel portion and an upper parallel portion. A cam curve consisting of an intermediate inclined portion is engaged with cam followers 25, 26 attached to the lower ends of the swing levers 6, 7, and in the lower parallel portion, the heater H2 has the belt rolls 1a, 2a. When the belt is below the required level, the cam followers 25 and 26 are guided so as to hold them close to each other, and in the middle inclined portion, the heater H2 rises to a level slightly below the belt rolls 1a and 2a. When
The cam followers 25, 26 are guided so as to be separated from each other, and in the upper parallel portion, the cam followers 25, 26 are continuously guided so as to be separated from each other. Therefore, the belt rolls 1a and 2a can be separated from each other by the guide action of the cam plate 8 when the lower heater H2 rises, and can avoid the interference with the lower heater H2 as much as possible. The lower heater H2 is designed to close to each other from the middle of the required lowering and close the upper side of the lower heater H2.Furthermore, the lower heater H2 is a belt roll 1a, 2a.
It moves up to half the height of the product on the conveyor and fits with the upper heater H1 and moves the required length to the downstream side while horizontally sealing the part that matches the registration mark of the packaged tube F, but at this time , Belt rolls 1a and 2a also on the lower heater
It is designed to move in a non-contact state close to H2.

Next, the operation will be described.

In Fig. 1, heaters H1 and H2 are open, and belt roll 1
a and 2a are close to each other and close the upper part of the lower heater H2 which is sunk below the table surface, and furthermore, the slack eliminating rolls 1d and 2d are located in the middle of the lowered position and the raised position. Article W is downstream conveyor than upstream conveyor C1
It shows the state of moving to C2. After this state, the heaters H1 and H2 will move closer to each other while moving to the upstream side by the box motion, and at this time, the transport surface of the upstream conveyor C1 will become shorter and the transport surface of the downstream conveyor C2 will become shorter. As it becomes longer, the sagging roll 1d rises,
The slack removing roll 2d descends to adjust the lengths of the conveyor belts 4 and 5, respectively. Further, the belt rolls 1a and 2a are designed so as to avoid interference with the rising lower heater H1 at the end, and the lower heater H1.
And the heaters H1 and H2 are closed to close the object W to be packed in the tube F to be packed,
As shown in FIG. 2, the W seals horizontally and the cutter K incorporated in the upper heater H1 cuts the packaging cylinder F in conformity with the registration mark between the articles W to be packaged. Becomes

Next, the heaters H1 and H2 are closed and horizontally moved to the downstream side, and the belt rolls 1a and 2a adjacent to both sides of the heater H2 are also horizontally moved integrally with this. At this time, the conveying surface of the upstream side conveyor C1 becomes long, and the conveying surface of the downstream side conveyor C2 becomes short, so that the slack eliminating roll 1d descends and the slack eliminating roll 2d ascends so that the conveyor belts 4 and 5 respectively become longer. The height is adjusted, and the state shown in FIG. 3 is obtained. Subsequently, the heaters H1 and H2 move toward the downstream side and move away from each other while moving toward the upstream side due to the box motion, and the belt rolls 1a and 2a approach each other. Conveyor C1
The transporting surface of No. 1 changes shortly, the transporting surface of the downstream side conveyor C2 changes long, and the heaters H1 and H2 return to the state shown in FIG.

As described above, when the heaters H1 and H2 are opened and moved to the upstream side, one package W passes between the heaters H1 and H2 after the gap between the upstream side conveyor C1 and the downstream side conveyor C2 is closed. Therefore, even when the object W to be packaged is a short product or a small product having a large weight, it can be satisfactorily passed without falling into or between the belt rollers 1a and 2a.

[Peripheral range of the present invention] In the above embodiment, the belt rolls 1a and 2a are moved to close the upper side of the lower heater H2. However, either one of the belt rolls 1a and 2a is moved to the lower side. Side heater H2
You may make it close the upper part when is descended. In that case, the belt roll on the non-movable side is provided at a conventional position so as not to interfere with the rise of the heater H2 on the lower side, and the belt roll on the movable side swings down the swing link by the plate cam and moves downward. Allow the top of the side heater to be closed. Both ends of the belt rolls 1a and 2a are pivotally supported on the lower ends of the rocking levers 6 and 7, the middles of the rocking levers 6 and 7 are pivotally attached to the movable block 3, and the upper ends of the rocking levers 6 and 7 are Both ends of an upper heater block (not shown) may be engaged with the plate cams 8 which are hung upside down.

[Effects of the Invention] As described above, according to the belt conveyor for the box motion type heat fusing and sealing apparatus of the horizontal bag-making filling and packaging machine of the present invention, at least the heater below the box motion type heat fusing and sealing apparatus is provided. A belt roll near one side is supported by a swing lever pivotally mounted on a movable block provided so as to move in synchronization with the horizontal component velocity of the box motion, and the swing lever is supported by a cam plate provided on the heater block. When the upper and lower heaters are closed, the swing lever is swung so that the belt roll retracts from above the lower heater before the upper and lower heaters are closed, and a belt length adjusting means is attached. The box motion type is designed to adjust the length of the endless belt according to the opening and closing of the upper and lower heaters. It can be installed in the heat-sealing device, and when the heater performs box motion, the belt roll closes the upper side of the lower heater immediately after the lower heater sinks, except when the horizontal seal is cut, and the belt transfer surface is closed. Since the length of the conveying surface will be changed so as to almost completely fill the gap, even if it is a short product with a large weight or a small product, it does not drop between the belt rolls or fall, A horizontal bag-making filling and packaging machine that can pass between belt rolls well and is suitable for packaging short products, small products, heavy products, and the like can be realized.

[Brief description of drawings]

1 to 3 relate to an embodiment of a belt conveyor for a box motion type heating, melting and sealing device of a horizontal bag-making filling and packaging machine of the present invention, and FIG. 1 shows that upper and lower heaters are moved upstream by box motion. FIG. 2 is a cross-sectional view showing a state in which the upper side of the lower heater, in which the two movable belt rolls are sunk downward, is closed while being moved to the maximum during the movement, and FIG. FIG. 3 is a cross-sectional view showing a state in which the two movable belt rolls are moved close to each other and close to each other, with the lower heater that has risen due to the two movable belt rolls being sandwiched therebetween. FIG. 6 is a cross-sectional view showing a state in which the two movable belt rolls are moved to the downstream side as they are, and two movable belt rolls are also moved close to each other with the lower heater interposed therebetween. H1 ... Upper heater, H2 ... Lower heater, F ... Packing cylinder, W ... Packaging object, C1 ... Upstream conveyor, C2 ... Downstream conveyor, 1a ... For upstream table Movable belt roll, 1d …… Deflection roll, 2a …… Movable belt roll for downstream table, 2d …… Deflection roll, 3 …… Movable block, 4,5 …… Conveyor belt, 6, 7 …… Swing Lever, 8 ... Cam plate,

Claims (1)

[Claims] 1. A belt conveyer which can be incorporated over the upstream side and the downstream side of a box motion type heat-sealing sealing device of a horizontal bag-making filling and packaging machine for performing end-sealing between articles to be packaged by upper and lower heaters. The upstream table movable belt roll that is closer to the lower heater than the upstream side and the downstream table movable belt roll that is closer to the lower heater than the downstream side are in either end direction of the upper and lower heaters. In a belt conveyor, which is supported by movable blocks provided on both sides of the heater and performs horizontal movement equal to the horizontal component of the box motion of the heater to change the length of the belt conveying surface on the upstream side and the downstream side of the heater. , Having an endless conveyor belt separated upstream and downstream of the heater, and the length of the belt conveying surface The upstream side conveyor and the downstream side conveyor, which have flexure removing rolls that move so that the conveyor belt is always stretched in response to fluctuations of the movable table roll for the upstream side table and the downstream side table. One or both of the movable belt rolls are pivotally supported on the upper end of a swing lever pivotally supported by the movable block, and one or both of the upstream table movable belt roll and the downstream table movable belt roll. Is pivotally supported by a swing lever pivotally supported by the movable block, and
By the guiding action of the cam plate that is integrally provided with one of the upper and lower heaters and is engaged with the swing lever, the upper side of the lower heater is closed when the lower heater is lowered. The belt conveyor for the box motion type heating, melting, and sealing device of the horizontal bag-making filling and packaging machine.