JPH03256808A - Light-weight stack packaging machine and conveyer - Google Patents

Abstract

PURPOSE:To effectively prevent a packaged article from tilting during transportation for improving the transportation characteristics by a method wherein a presser plate presses the packaged article when the article is sealed, and the article is conveyed in the traveling direction of a conveyer while the presser plate is kept at the pressing position after sealing and cutting works are finished. CONSTITUTION:After a stack 6 is placed between packaging material films 5a and 5b and sealed and cut by a sealer 7, a controller C1 controls an elevator 22 and a transportation device 26 so that a presser plate 4, which is located at the pressing position, is transferred for a specified distance synchronizing with a conveyer 1. A packaged article, e.g. the stack 6 packaged with the film 5a and 5b, is conveyed by the conveyer 1 and the presser plate 4 in the traveling direction of the conveyer 1 under a specified conveying force. Therefore, the packaged article is removed from the sealer 7 even when the films 5a and 5b are partially stuck on the sealer 7, and both ends of the packaged article are kept in parallel with the travelling direction of the conveyer 1. As a result, the packaged article is prevented from tilting, so that failures in the following binding step can be prevented and the transportation characteristics are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a lightweight stack packaging and conveying device for transporting a lightweight stack by wrapping it in a film, and particularly relates to measures for improving the transport characteristics of the stack.

(Prior art) Conventionally, in packaging and conveying devices that sandwich and seal stacks between material films, when sealing a stack, a pressing plate presses the stack sandwiched between material films to seal the stack. The air between the films is expelled to compactly package the stack, and after the package is sealed and cut, the pressure plate stops pressing, returns the press plate to the retracted position, and transports the package to the next process on a conveyor. I try to do that. On the other hand, for example,
As disclosed in Japanese Patent No. 59968, it is equipped with a pair of pressing devices that move up and down to press the stack, and a pair of conveyors installed below the pressing devices, and the stack is covered with a material film between the two conveyors. In addition to sealing the stack compactly by passing the package while sandwiching it, an endless belt is wrapped around a pressing device installed on the conveyor on the downstream side, and when sealing the package, the package is pressed through the endless belt. It is a known technique to smoothly pack and transport the stack by operating an endless belt to transport the packaged items in the transport direction of the transport conveyor after sealing, force/sorting is completed.

(Problem to be Solved by the Invention) By the way, in the above-mentioned general stack packaging and conveying apparatus, although the surface of the sealer is usually coated with a material with good releasability such as fluorocarbon resin, the films formed by the sealer are not bonded to each other. During welding, the welded film and sealer may become adhesive over a portion of the width of the sealer. In particular, if dust, dirt, etc. are scorched by the heating of the heater and remain on the fluorocarbon resin or the like, the releasability of the part deteriorates and the film and sealer tend to become adhesive. In that case,
In particular, when the stack is lightweight, the weight of the stack itself is small and hardly contributes to the conveying force of the package.

Therefore, when the pressing force is released after the seal is cut and the package is transported on the conveyor, the separation of the package from the sealer may be delayed due to adhesion between the seal part of the package and the sealer. It will be transported with the sides inclined with respect to the transport direction. Then, in the next bundling step, there is a problem that it becomes difficult to tie the packages if they are tilted.

On the other hand, in the above publication, since the package is forcibly conveyed in the conveyance direction of the conveyor, the package can be reliably separated from the sealer, and the package is conveyed tilted as described above. It is possible to avoid such situations, but
Due to its structure, it takes a long time to evacuate the entire heavy pressing device after sealing and cutting, so it cannot be used for high-speed packaging. Further, there is a problem that the structure becomes complicated, leading to an increase in cost.

The present invention has been made in view of the above, and its purpose is to effectively prevent the tilting of the package during transportation by providing a means for separating the package after seal cutting from the sealer with a simple configuration. The objective is to prevent this from occurring and improve the conveyance characteristics.

(Means for Solving the Problem) In order to achieve the above object, the solution of the present invention utilizes a pressing plate that presses the package during sealing, and maintains the pressing position of the pressing plate even after sealing and cutting are completed. The object is to separate the package from the sealer by moving it in the conveying direction of the conveyor while the package is still in the conveying direction, thereby generating a conveying force to convey the package in the conveying direction of the conveyor by the pressing force of the press plate.

Specifically, as shown in FIG. 1A, the first solution is to transport a lightweight stack 6 onto a conveyor 1 while being sandwiched between material films 5a and 5b whose front ends are welded to each other. At the rear of the stack 6, the material film 5a is sealed by sealing.

After welding the 5b together, cutting the welded part, and packaging,
The object is a lightweight stack packaging and conveying device in which the package 9 is conveyed by the conveyor 1.

Then, the material film 5a is transported onto the transport conveyor 1 to the lightweight stack packaging and transport device.

a pressing plate 4 for pressing the stack 6 sandwiched between the stacks 6 and 5b from above, and a lifting means 22 for lifting and lowering the pressing plate 4 between a pressing position for pressing the stack 6 and an upper retracted position. , a moving means 26 for moving the pressing plate 4 in the conveying direction of the conveyor 1, and a pressing plate 4 at the pressing position after welding and cutting the films 5a and 5b by the seal rough.
A control means C1 is provided for controlling the elevating means 22 and the moving means 26 so that the conveyor 1 is moved a predetermined distance in synchronization with the transport operation of the transport conveyor 1, and then raised and returned to its original position. It is something.

The second solution, as shown in FIG. 1B, targets lightweight stack packaging and three-pack transport bags similar to the first solution.

Then, the material film 5a is transported onto the transport conveyor 1 to the lightweight stack packaging and transport device.

a pressing plate 4 for pressing the stack 6 sandwiched between the stacks 6 and 5b from above, and a lifting means 22 for lifting and lowering the pressing plate 4 between a pressing position for pressing the stack 6 and an upper retracted position. , a biasing means 30 for biasing the press plate 4 in a direction opposite to the conveyance direction of the conveyor 1; and a biasing means 30 for maintaining the press plate 4 in the press position for a predetermined time after welding of the material films 5a and 5b by the seal rough. The structure is such that each control means C for controlling the elevating means 22 is provided.

(Function) With the above configuration, in the invention of claim (1), the stack 6 on the conveyor 1 is the material film 5a.

5b, sealed and cut by the seal rough, the control means C1 controls the lifting means 22 and the moving means 26 to move the pressing plate 4 in the pressing position a predetermined distance in synchronization with the conveyor 1. Therefore, the packaged product made by wrapping the stack 6 with the material films 5a and 5b is transported by the transport conveyor 1 and the press plate 4 with a predetermined transport force in the transport direction of the transport conveyor 1. Therefore, the material film is wrapped in the seal rough. Even if parts of 5a and 5b are welded, the conveyance force separates the package from the seal rough and keeps both ends of the package parallel to the conveyance direction of the conveyor 1. The inclination will not cause defects in the next bundling process, etc., and the conveyance characteristics will be improved.

Claim (In the invention of claim 2, the stack 6 on the conveyor 1
After being sandwiched between the material films 5a and 5b, sealed and cut by the seal rough, the control means C causes the lifting means 22 to maintain the pressing position of the pressing plate 4 for a predetermined period of time.
is controlled, the pressing force of the press plate 4 on the conveyor conveyor 1 generates a conveying force that conveys the package in the conveyance direction of the conveyor 1, and the package is forcibly separated from the seal rough, thereby achieving the above-mentioned claim. Conveyance characteristics are improved by the same effect as in the invention of item (1). At this time, after the package is separated from the seal rough, the press plate 4 is controlled to return to the retracted position, so the press plate 4 is returned to its original position by the biasing means 30.
Thereafter, packaging and transportation operations are performed smoothly.

(Example) Hereinafter, an example of the present invention will be described based on the drawings from FIG. 2 onwards.

2 to 7 show a first embodiment of the present invention.

Fig. 2 schematically shows the configuration of the lightweight stack packaging and conveyance device, where 1 is a conveyor installed in a horizontal state and is used to convey packages from the left to the right in the figure; 2 is the conveyor; A pressing device C1 is installed above the conveyor 1 to press the packages on the conveyor, and C1 is a controller serving as a control means for controlling the conveyor 1 and the suppression device 2.

Further, 4 is a pressing plate attached to the lower end of the pressing device;
5a and 5b are material films supplied to the conveyor 1 from above and below, respectively; 6 is a stack formed by stacking magazines, etc.; and 7 is the material film 5a, 5b.
A sheeter 8 is placed in the seal rough for welding and sealing the stack 6, and is a cutter for cutting the material films 5a, 5b after they are sealed, and is supplied from the left side in the figure. The stack 6 to be processed is sandwiched between a pair of material films 5a and 5b, and then transferred to the conveyor 1.
was sent to the right in the figure, and at a predetermined position, the stack 6 and the material films 5a, 5b were pressed by the pressing plate 4 of the pressing device 2 to expel excess air between the material films 5a, 5b and the stack 6. After that, the rear part of the stack 6 of the material films 5a and 5b is welded and sealed with a searuff, cut with a cutter 8, and then the package is transferred to a binding machine (not shown) in the front.

Here, as shown in FIG. 3, the sea rough is equipped with a lower heater 10 and an upper cooling table 11. The heater 10 is formed to have the same cross-sectional shape in the width direction of the material films 5a and 5b (perpendicular to the plane of the paper in the drawing), and is provided at two locations at the upper end, on the upstream side and the downstream side in the material film feeding direction. A base material 12 formed to have convex portions 12a, 12a and a concave portion 12b between them, and the base material 1
A rubber cushioning material 13.13 attached to the lower surface of both convex portions 12a, 12a of No. 2, and the cushioning material 13.1
3. Two heater plates 14 and 14 made of conductive material are attached to the upper surfaces of each of the heater plates 14 and 14, and a Teflon sheet 15 is provided to cover each of the above-mentioned members. Further, the cooling stand 11 is
It is divided into two partial stands 16.16 that can come into contact with the heater plate 14.14 of the heater 10, and the cutter 8 is placed between each of the divided partial stands 16.16.
．． It is set up so that it can be accessed from 16.

That is, when welding the material films 5a and 5b, the heater 10 and the cooling table 11 of the sea luff move upward and downward, respectively, to weld the two material films 5a.

5b in two places, and at the same time instantaneously heats each heater plate 14, 14 with a pulsed voltage to weld each material film 5a, 5b together, the cutter 8 is moved to the cooling stand 1.
The material film 5 is made to protrude from between the partial bases 16 and 16 of 1.
A, 5b are cut.

Next, the above-mentioned pressing device 2 will be explained based on FIG. 4 and FIG. Vertical frames 21a, 2 made up of two substantially rectangular pipes that extend downward a predetermined distance at intervals.
1a, horizontal frames 21b, 21b consisting of two substantially rectangular pipes extending horizontally from the lower ends of the vertical frames 21a, 21a along the conveyance direction of the conveyor 1, and rear ends of the horizontal frames 21b, 21b. An end frame 21c consisting of a connecting substantially rectangular pipe, a horizontal frame 21b,
A thick plate-shaped front end stay 21d is fixed to the lower end surface of the distal end of the frame 21b and connects the two, and the horizontal frames 21b, 21
An intermediate stay 21e in the form of a thick inner plate is provided to connect the intermediate portions of b. Note that the end frame 21c of the bushing frame 21 is also connected to the main frame 3, and the bushing frame 21 is installed between the main frames 3.

Furthermore, the end frame 21c and the intermediate stay 21
A cylinder portion of a horizontal cylinder 26 serving as a moving means for moving the pressing plate 4 along the conveying direction of the conveyor 1 is fixed across each center portion of the horizontal cylinder 26, and at the tip of a rod portion of the horizontal cylinder 26, A slide plate 24 that is horizontally movable along the conveyance direction of the conveyor 1 is fixed at its center, and both ends of the slide plate 24 are respectively fixed to the housings of horizontal bushes 27 and 27 provided in the horizontal direction. has been done. On the other hand, horizontal guide shafts 28.28 are provided at both ends of the tip stay 21d and intermediate stay 21e to connect them.
28 slidably supports the horizontal bushes 27.27 to guide the horizontal movement of the slide plate 24 by the horizontal cylinder 26. That is, slide version 2
4, the slide plate 24 is moved in the conveyance direction of the conveyor 1 so that when the horizontal cylinder 26 is extended, it is at the position shown by the solid line in the figure, and when it is retracted, it is at the position shown by the two-dot chain line in the figure.

A vertical cylinder 22 with a rod portion facing downward is attached to the slide plate 24 at the tip of the cylinder portion. I'm trying to move it up and down. Moreover, 23.23 are vertical guide shafts which are respectively installed on both sides of the vertical cylinder 22 and guide the vertical movement of the press plate 4, and the vertical guide shafts 23.23
The lower end of is fixed to the pressing plate 4, and is supported by vertical bushes 25, 25 provided on the slide plate 24 so as to be slidable in the vertical direction. The vertical cylinder 22 is
When it is extended, the press plate 4 reaches near the upper surface of the conveyor 1 (as shown by the two-dot chain line in FIGS. 4 and 5),
While pressing the package 9 on the conveyor 1 with a predetermined pressure, the press plate 4 is placed at the solid line position in the figure during contraction.
That is, the pressing plate 4 is moved up and down between a pressing position for pressing the stack 6 and an upper retracted position.

Next, FIG. 7(a) shows the operation of this lightweight stack packaging and conveying device controlled by the controller CI.
This will be explained based on (d).

First, when the stack 6 is fed between the material films 5a and 5b whose tips have been joined by the previous seal, the vertical cylinder 22 of the pressing device 2 is in a contracted state, and the pressing plate 4 is in the upper retracted position (see Fig. It has risen to position a).

At this time, the sea luff is also open vertically. Also,
The lateral cylinder 26 is in an extended state.

When the stack 6 is sandwiched between both material films 5a and 5b and placed on the conveyor 1, the horizontal cylinder 2
6 remains extended, the vertical cylinder 22 of the pressing device 2 is in an extended state, and the pressing plate 4 descends to the pressing position (the position shown in FIG. Press the stack 6 and the material film 5a from above.

The sea rough moves up and down in a state where the air between the spaces 5b and 5b is expelled and the whole becomes compact, and the heater 10 and cutter 8
The material films 5a and 5b are welded and cut by
The stack 6 is sealed between the material films 5a and 5b to form a package 9 (see figure (b)). Next, the horizontal cylinder 26 contracts while the vertical cylinder 22 remains extended, that is, the package 9 is pressed by the pressing plate 4.
In synchronization with the conveyor 1, the package 9 is conveyed to the right in the figure, that is, in the conveyance direction of the conveyor 1. At this time, the searuff opens up and down, but in the process, a pressing force is applied between the press plate 4 and the conveyor 1 to grip the package 9, and the package 9 after the seal cut is moved to the heater 10 of the searuff.
The packages 9 are separated from each other, and the packages 9 are sent to the right end of the conveyor 1 while keeping both sides closed in the conveyance direction of the conveyor 1 (see FIG. 3(c)).

When the package 9 reaches the right end, the vertical cylinder 22 contracts again, the press plate 4 returns upwards, the pressing force on the package 9 is released, and the package 9 continues to the next step on the right. (here, the binding process) (see figure (d)).

Finally, the horizontal cylinder 26 extends again, and the pressing plate 4 returns to the left end side of the conveyor 1 while maintaining the upper position, that is, to the position shown in FIG. It is done like this.

Therefore, in the invention of claim (1), when packaging the stack 6, while pressing the material films 5a, 5b and the stack 6 with the pressing plate 4, the material film 5 is
Welding and cutting of a and 5b are performed, and the stack 6 is packaged.

At this time, the controller C1 controls the vertical cylinder 22 (elevating means ) and horizontal cylinder 22 (
Since the moving means) are controlled, the material films 5a, 5b
A part of the seal part of Sealuf's heater 10 or cooling stand 11
The entire package 9 can be reliably separated even if it adheres to the package.

That is, if dirt or the like adhering to the sea rough gets scorched by the heat of the heater 10, even if the heater plate 14 of the heater 10 is covered with the Teflon sheet 15, the burnt dirt will accumulate on it and the packaged item 9 A part of the seal portion may be welded at that location, and the package 9 may not be immediately separated from the seal rough.

In this case, if the pressing plate 4 returns upwards immediately after sealing and cutting, as in the case of a normal product, the side surface of the package 9 will be tilted with respect to the transport direction of the transport conveyor 1, which may cause defects in the next bundling process, etc. It causes the growth of

In particular, in the case of a lightweight stack, since the weight of the stack 6 itself is light, it lacks the force to separate the packages 9, and even if the welding force is small, it is likely to cause transportation defects.

On the other hand, as in the above publication, in addition to the pressing plate that presses the material film and stack during sealing, a pressing device that conveys the package after seal cutting together with the conveyor may be provided, but in that case, the pressing device There is a problem in that it takes time to recover and cannot be applied to high-speed packaging. Moreover, the device itself becomes complicated, leading to an increase in cost.

In contrast, in the present invention, the existing pressing plate 4 is used as is, and after the stack 6 is sealed and cut, the pressing plate 4 is maintained at the position where the package 9 is pressed and transported by the controller C+ (control means). The vertical cylinder 2 is moved in synchronization with the conveyor 1 in the conveyance direction of the conveyor 1.
2 (elevating means) and the horizontal cylinder 26 (moving means) are controlled, so that the pressing force of the pressing plate 4 and its movement in synchronization with the conveyor 1 generates a conveying force that conveys the package 9. Even if a part of the object 9 is welded to the seal rough, the package 9 will be separated from the seal rough while maintaining both ends parallel to the transport direction, and the package 9 will be separated from the seal rough.
tilting is effectively prevented. Therefore, it is possible to improve the conveyance characteristics.

Next, regarding the second embodiment according to the invention of claim (2),
This will be explained based on FIGS. 8 and 9. 8 and 9 are views corresponding to FIGS. 4 and 6 in the first embodiment, and 30 indicates the intermediate stay 21e and the slide plate 2.
4 as a biasing means, the compression spring 30 biases the pressing plate 4 in a direction opposite to the conveying direction of the conveyor 1 via the slide plate 24. is being done. The other configurations are the same as those in FIGS. 4 and 6 above. However, the configuration of the controller is
This embodiment differs from the first embodiment described above, and is therefore designated by the reference numeral (not shown).

In this embodiment, each controller C controls the stack 6.
After the seal is cut, the vertical cylinder 22 is kept in an extended state to maintain the pressing plate 4 in the pressing position for a predetermined period of time, and the pressing force causes the pressing plate 4 to be conveyed in the conveying direction together with the conveyor 1. be done. Then, when a predetermined period of time has passed and the conveyor 1 reaches the vicinity of the right end, the vertical cylinder 22 contracts and the press plate 4 returns upward, and at the same time, the slide plate 24 returns to its original position due to the biasing force of the compression spring 30. It returns to near the left end of the transport conveyor 1. In other words, the stack 6 is packaged in the same process as shown in FIGS. 7(a) to 7(d) above.
Transport takes place.

Therefore, in the invention of claim (2), the compression spring 30 (
The pressing plate 4 is urged in a direction opposite to the conveyance direction of the conveyor 1 via the slide plate 24 by the urging means), and maintains a predetermined sealing position when the stack 6 is sealed. After cutting the seal of the package 9, the controller C
, (control means) controls the pressing plate 4 to maintain the pressing position for a predetermined period of time, so that the pressing force of the pressing plate 4 generates a conveying force to convey the package 9 between the conveyor 1 and the conveyor 1. Due to this conveying force, the package 9 is separated against the welding of the sea rough. Therefore, 1. The same effect as the invention of claim (1) above can be achieved.

In each of the above embodiments, the press plate 4 is connected to the vertical cylinder 22 (
The press plate 4 and the vertical cylinder 22 are moved via the slide plate 24 by the horizontal cylinder 26 (moving unit) or the compression spring 30 (biasing unit). Needless to say, it is also possible to attach it to the horizontal cylinder 26 or the compression spring 30, and to move the entire body up and down using the vertical cylinder 26.

(Effects of the Invention) As explained above, according to the invention of claim (1), the lightweight stack sandwiched between the material films is pressed by the pressing plate, the stack is sealed, and the stack is conveyed by the conveyor. Lightweight stack packaging.

In the conveyance device, after sealing and cutting the stack with a sealer, the press plate at the press position is moved a predetermined distance in the conveyance direction in synchronization with the conveyor, then raised to the retracted position and returned to the original position. As a result, it is possible to generate a predetermined conveying force for the package to reliably separate the package from the sealer, and it is possible to prevent the package from tilting due to a part of the package being welded to the sealer. Therefore,
Conveyance characteristics can be improved.

According to the invention of claim (2), a lightweight stack packaging.

In the conveyor, the press plate is biased in the direction opposite to the conveyance direction of the conveyor, and after the stack is sealed and cut by the sealer, the press plate is maintained at the press position for a predetermined period of time, so that the packaged items are The package can be separated from the sealer by generating a predetermined conveying force against the sealer, and therefore, the same effect as the invention of claim (1) above can be obtained.

[Brief explanation of drawings]

Figures 1A and 1B represent claims (1) and (1), respectively.
2) is a block diagram showing the configuration of the invention; FIG. Figures 2 to 7 show the first embodiment, and Figure 2 shows lightweight stack packaging;
FIG. 3 is a front view schematically showing the overall structure of the conveying device, FIG. 3 is a front view showing the structure of the sealer in cross section, and FIGS. 4 to 6 are front, rear, and plan views showing the structure of the pressing device, respectively. ,
Figure 7 is an explanatory diagram showing the stack packaging and transportation process;
9 and 9 show a second embodiment, FIG. 8 is a front view of the pressing device, and FIG. 9 is a plan view of the pressing device. 1 Transport conveyor 2 Pressing device 4 Pressing plate 5 Material film 6 Stack 7 Sealer 22 Vertical cylinder (lifting means) 26 Horizontal cylinder (moving means) 30 Compression spring (biasing means) cl, c Controller (controlling means) Fig. 3 Figure 4 1 (1)) Mu diagram

Claims (2)

[Claims] (1) A lightweight stack is carried onto a conveyor with its front ends sandwiched between material films welded to each other, and the material films are welded together using a sealer at the rear of the stack, and the welded portion is cut and packaged. After that, in a lightweight stack packaging and conveying device in which the package is conveyed by a conveyor, a pressing plate is provided to press the stack sandwiched between the material films conveyed on the conveyor from above. a lifting means for moving the pressing plate up and down between a pressing position for pressing the stack and an upper retraction position; a moving means for moving the pressing plate in the conveying direction of the conveyor; and welding of the film by the sealer. , a control means for controlling the elevating means and the moving means so that after cutting, the pressing plate at the pressing position is moved a predetermined distance in synchronization with the conveyance operation of the conveyor, and then raised and returned to the original position; A lightweight stack packaging and conveying device characterized by being equipped with. (2) A lightweight stack is carried onto a conveyor with its front ends sandwiched between material films welded to each other, and the material films are welded together using a sealer at the rear of the stack, and the welded portions are cut and packaged. After that, in a lightweight stack packaging and conveying device in which the package is conveyed by a conveyor, a pressing plate is provided to press the stack sandwiched between the material films conveyed on the conveyor from above. a lifting means for raising and lowering the pressing plate between a pressing position for pressing the stack and an upper retracted position; and a biasing means for urging the pressing plate in a direction opposite to the conveyance direction of the conveyor;
A lightweight stack packaging and conveying device characterized by comprising: a control means for controlling the elevating means to maintain the pressing plate in the pressing position for a predetermined period of time after the material film is welded by the sealer.