JPS60123307A - Packaging sealing method and device thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field] The present invention relates to a method and apparatus for further enclosing a flat packaged object, mainly a group of laminated bags made of a large number of stacked bags, a book cover, etc., into an outer bag. be.

[Prior art]

Conventionally, this type of laminated bag group is made by forming a bag portion at the tip of a bag with a bottom already formed or a continuous outer tube band, and then inserting the laminated bag group into this bag portion.

However, in this type of known method and device, since the outer bag has a bottom, it is difficult to widen the outer bag to the bottom, and the corners of the stacked bags, which are the items to be packaged, curl up when inserted, and it takes human labor to correct this. It takes.

Also, even if it is done mechanically, when inserting the laminated bags by sandwiching them from the top and bottom, there is a risk that the clamping tools will break through the outer bag ferrules, so the outer bag should have a considerable amount of extra space. However, if the bags are of this size and have ample room, the individual bags in the stacked bag group will easily move within the outer bag after packaging, and this type of packaging will cause problems during the product distribution process. The bag inside the outer bag becomes misaligned and loses its component value.

[Prior art]

Therefore, the applicant's company expands the outer tube band T's end T] into a cylindrical shape, and after placing the flat packaged object B, such as the group of laminated bags mentioned above, inside it, When preparing a product, the exterior tube strip 'l' is welded in the transverse direction by two sets of impulse type heat sealing jaws 10.20, and at this time, the exterior tube strip is cut near the sealing position on the bottom side. , a method and apparatus for separating the two pairs of heat sealer jaws 10 and 20 and separating the sealed package TI from the heat sealer jaws 10 and 20 by its own weight is described in the earlier Japanese Patent Application (Japanese Patent Application No. 58-18592).
4), and conducted private experiments within the applicant's company, and some results were obtained (see Figures 1 to 6).

However, impulse type heat sealer jaws 10 or 20
The remains of the melted outer tube band T are visible on the heating wire part, making it difficult to separate from the sealed package after bathing, especially when the secret bag is 2
The packaging bag C becomes cross-linked between the jaws of the heat sealer at 10° and 20°, and it sometimes happens that it becomes difficult to peel off with just the force of its own weight, making subsequent packaging operations impossible.

[Object of this invention]

In this invention, even if the seal part of the sealed package is fused to the welded part of the heat sealer as in the tapered technology described above, this can be reliably separated and the sealed package can be sealed by two sets of heat sealers. The purpose is to improve packaging efficiency by allowing the product to be transported from between the jaws using its own weight.

[Configuration of this invention]

This invention is based on the method described in the above-mentioned prior art.
In this method, the heat sealer jaws on the bottom side separate from each other before the other set of heat sealer jaws separate after completing the sealing of the outer tube band, and the heat sealer jaws on the bottom side separate at least about the sealing width dimension in the upstream direction of the outer tube band. Move to
After that, separating the heat sealer of the other string,
This packaging sealing method is characterized in that it is repeated every time weld.

Further, as a prerequisite for an apparatus for carrying out the method of the above prerequisite, in this apparatus, the pair of bottom heat sealing jaws are provided so as to be able to move forward and backward in the conveying direction of the outer tube band, and after the sealing operation, the pair of bottom heat sealing jaws 2) An operating means and sequence in which the bottom heat seal jaws separate from each other while the bottom heat seal jaws are in phase pressure welding, move slightly in the upstream direction of the outer tube band, and return to the original position before the next phase pressure welding. This is a packaging sealing device characterized by being provided with a control device.

[Description of implementation]

This invention will first be described based on a typical embodiment of the device invention.

In Figure 4 to Figure 9, 10 is a pair of opening and heat sealing jaws, and the lower jaw 11 is fixed to the machine frame 121C, and an impulse type heat sealer 16 that appears in a part of the lower jaw 11 is fixed to the machine frame 121C.
It is usually equipped with F cylinder device, solenoid,
In some cases, it is provided so that it can be moved up and down by purely mechanical cams, levers, etc., and in the illustrated example, it can be lowered from the clamping surface 14 by about 5 to 10 degrees using an air cylinder device 14. Reference numeral 15 designates the upper jaw, and a member made of heat-resistant rubber is introduced into the upper jaw at a position corresponding to the heat sealer 16. Suction holes 16 connected to a reduced pressure or vacuum source are provided along the front and rear edges of the opening and heat sealing jaws 10 consisting of the upper and lower jaws 11.15. The upper jaw 15 is arranged to move up and down by generally known means.

Reference numeral 20 denotes a bottom heat sealing jaw which is provided on the upstream side of the outer tube strip T than the opening and heat sealing jaw 10, and these are horizontally attached to the machine frame 12 in the conveying direction of the outer tube strip T. The lower jaws 26 of the pair of bottom heat seal jaws 20 are fixed to the movable frame 22, and the lower jaws 26 are equipped with an impulse type A heat sealer 24 and a sawtooth cutter 25 that appears and retracts along the heat sealer 24 are provided so as to be able to move up and down. On the upper jaw 26 of the bottom heat seal jaw 20, a member 27 made of heat-resistant rubber is provided at the portion where the heat sealer 24 contacts.
is fitted, and an escape groove 28 is provided at a position corresponding to the sawtooth cutter 25, and the upper jaw 26 is fitted into the lower jaw 2.
It is provided so that it can be moved towards and away from 6.

The outer tube band T is larger than the pair of bottom seal jaws 20.
, and on the moving frame 22 is a pair of clamping type conveying clamps 29. that clamp the exterior chew band T from above and below.
60 is provided, moves back and forth together with the moving frame 22, and is further provided with 60 to 50 cII with respect to the moving frame 22.
It is provided so that it can be moved back and forth by about I, and in the illustrated embodiment, the opening/closing and forward/backward movement of the conveying clamps 29.30 are also performed by F-cylinder devices 31.32.

The movable frame 22 has a pinion 65 rotated by a reversible rotary motor 36 equipped thereon, which is meshed with a rack 64 fixed to the guide rail 21 along the guide rail 21.
By rotating this motor 66, the bottom heat seal jaw 20 can be moved toward and away from the open/close heat seal jaw 10.

Reference numeral 66 denotes a support stand provided between the pair of heat sealing jaws 10 and 20, which supports the machine frame 12 by means of a horizontal axis 67 in the longitudinal direction at a position close to the opening and heat sealing jaws 10. It is pivotably mounted on the F-cylinder device 68 and can be freely rotated from a horizontal position to a position tilted downward by 1 qA in case of emergency.

[Embodiments of the operation and method of the apparatus of the invention] Detailed explanation〕

The method invention of this application will be explained together with the operation and sequence control device of this device configured as described above.

First, as shown in Fig. 4, the support base 66 is in a downwardly inclined state, and the opening and heat-sealing jaws 10 and the bottom heat-sealing jaws 20 are positioned so that both ends of the package C can be sealed. Clamps for transporting the exterior tube band T 29.
30, the starting position is a state in which the tip portion T1 is held in a slightly protruding state.

Next, the motor 63 is rotated in the direction of conveying the outer chew band,
The moving frame 22 is moved in the direction of the opening/heat sealing jaw 10, and once it has moved to a predetermined position, the spear 1 limit sensor 6 is moved.
9, the motor 66 is stopped and the moving frame 22 is stopped. Subsequently, the conveying clamps 29.60 holding the exterior tube strip T are further advanced with respect to the moving frame 22 by the F-cylinder device 32, and the tip end TI of the exterior tube strip T is opened and heat-sealed. Move it forward to position 10 (see figure 5).

Then, the upper jaw 15 of the opening/heat sealing jaw 10 is lowered, and the tip portion is held between the lower jaw 11. At this time, the heat sealer 16 provided on the lower jaw 11 is located below the clamping surface of the lower jaw 11 and is not heated. Next, the suction holes 16 separately adsorb the upper and lower films of the tip Tl of the exterior tube band T, and the opening and heat sealing jaws 10 are separated again, and the above-mentioned exterior tube band T
The distal end TI is opened into a cylindrical shape. During this time, the conveying gripping jaws 29.60 are separated and the motor 66 is moved together with the moving frame 22.
It returns to the original position by reversing and is stopped by the limit sensor 40 of the spear 2.

Next, the support stand 66 is placed in a horizontal state by the air cylinder device 68 (see Figures 1 and 6).

Next, the article to be packaged B is inserted into the opening of the outer tube band T by an insertion means (not shown), and the two sets of heat-seal jaws are opened, the bottom/heat-seal jaw 1o and the bottom heat-seal jaw 2.
It is inserted up to 0.

then said two sets of heat sealing jaws 10.20 are closed together;
The respective heat sealers 16 and 24 are heated together;
The outer tube band T is heated in the transverse direction before and after the packaged object B to weld the upper and lower films together, and the heat sealers 16 and 24 begin to cool them together. During this time, the cutter 2 installed on the lower jaw 26 of the bottom heat seal jaw 20
5 rises into the relief groove 28 of the upper jaw 26 and connects the upper and lower jaws 26.
and 26 are cut in the transverse direction on the upstream side of the heat sealer 24.

At the same time as the two sets of heat-sealing jaws 10.20 clamp during heat-sealing, the conveying clamping jaws 29.60 again clamp the exterior tube band T (see Fig. 7).

The method explained above is based on the earlier patent application filed in 1983-
There is nothing different from No. 185924.

Next, the features of the present invention will be explained.

That is, now that the two sets of heat sealing jaws 10 and 20 have completed sealing and are still holding the outer tube band T together, the bottom heat sealing jaws 20 open first, and at the same time, the motor 66 is slightly turned on. Rotate the corner in the opposite direction and move frame 2
2, the bottom heat seal jaw 20 is opened and separated from the heat seal jaw 10 by at least 240 widths of the heat solar 240 (approximately 5 to 20 mm), and the bottom heat seal jaw 20 is separated from the package seal portion on the bottom side. (See solid line position in Figure 8).

The movement dimension of the moving frame 22 due to the above-mentioned reverse rotation of the motor 66 is determined by setting the rotation time of the motor 66 with a timer, or
The movement dimension of the moving frame 22 is determined by the limit sensor 41 of 176.
These signals are used to stop the motor 66.

Further, the next support stand 36 is tilted, and the opening and heat sealing jaws 10 are opened to allow the package C to fall under its own weight and be carried out of the apparatus. At this time, the heat sealer 16 provided in the lower jaw 11 of the pair of opening/heat sealing jaws 100 is retracted below the clamping surface thereof.

The above sequence operations are performed by an electromagnetic or electronic sequence control device, or by a computer. Although motors and pneumatics were used as power sources for each of the operating parts described above, they may be entirely electric (including linear motors), or may be entirely pneumatic or hydraulic, or some may be purely mechanical means or , even if electromagnetic means are combined, there is no change in this invention.

Repeat the above operations in sequence.

[Effects of method invention]

In this method invention configured as described above, since the flat article B is inserted into the outer tube strip T, the outer tube strip of the article B can be welded in the transverse direction. Not only can the fabric of the outer tube band T be effectively used, but even after the package is reduced to zero, the appearance of the packaged object B inside is not disturbed and the commercial value is not lost, and especially in the method of the present invention, After welding, a method is adopted in which the bottom heat seal jaw 20 of one pair of heat seal jaws is opened first and moved at least 240 widths of the heat seal in the direction away from the other opening/heat seal jaw 10.
Even if the bottom heat seal jaw 20
Even if the sealed portion of the package 0 adheres to the heat sealer 24 or the member 27 of Leave. Therefore, when the rear support stand 66 is tilted, the packaging bag 0 can be opened and heat-sealed by the jaws 1.
Since the package C is suspended from part 0 and then the heat seal jaw 10 is separated, even if a part of the package C is fused to the heat sealer 13 of the lower jaw 11 of the opening and heat seal jaw 10. , it has the effect of being easily and reliably separated and carried out.

[Effects of device invention]

In the device invention, the method invention described above can be carried out, the same effects as the method invention can be achieved, and the bottom heat seal jaw 2
It is only necessary to add a mechanism for slightly separating the opening and closing/heat sealing jaws 10, and the device is not particularly complicated.

[Effects of device implementation]

Also in the illustrated embodiment, the bottom heat seal jaw 20 is installed on the movable frame 22 and is provided to move back and forth in the conveyance direction of the exterior tube band T, so that it is placed slightly further upstream after welding. As a means for moving the motor 66 to the position shown in the previous application, a program is incorporated into the sequence control device to allow the motor 66 to rotate slightly in reverse, and a device for limiting the operating time by a timer (not shown) or the 4-tooth sensor 41 is used. It can be done by simply adding it to something, and requires almost no changes to the mechanical parts.

In the illustrated embodiment, the bottom heat sealing jaw 20 moves back and forth each time the outer tube band 1 is conveyed, but the position of the bottom heat sealing jaw 20 can be adjusted back and forth. In the case of a type in which the bottom heat seal jaw 20 is clamped at a fixed position, the bottom heat seal jaw 20 may be slightly moved by a solenoid, a cam, or an F cylinder device, but the device of the present invention is the same.

In addition, in the illustrated embodiment, the opening/heat sealing jaw 1
Since the lower jaw 11 of 0 is fixed to the machine frame 12, it is easy to install the heat sealer 16 on it so that it can move up and down.As shown in Figure 4, after welding, the heat sealer 16 is attached to the upper and lower jaws 11.15. The heat sealer 16 of the opening and heat sealing jaw 10 is designed so as to be separated from the clamping surface.
There is no risk that the welded portion of the package 0 will adhere to the lower jaw 11 of the heat-sealed jaw and that the welded portion will not separate from the lower jaw 11 of the heat-sealed jaw.

In the above-mentioned embodiment, the vacuum or vacuum suction hole 16 was shown as an example of the means for opening the exterior tube band T, but a weak adhesive member may be used in combination with this, or , open only this adhesive member and heat seal jaw 10.
Even if the upper and lower jaws 11 and 15 are equipped, there is no difference in this invention.

[Brief explanation of drawings]

The drawings relate to this invention, and Figures 1 to 6 are longitudinal sectional side views showing the method of the invention of the earlier application, and Figures 4 to 10 show embodiments of this invention. ,
Figure 4 is a side view of the starting position, Figure 5 is a side view with the outer tube band fed in, Figure 6 is a side view with the outer tube band opened, and Figure 7 is a side view when heat-sealed. , Figure 8 is a side view of the bottom heat seal jaw, Figure 9 is a mechanical side view showing the mechanism of the bottom heat seal jaw, and Figure 10 is an operational diagram showing the operational relationship of each part. In the figure, the symbol T...Exterior tube band, T1...Tip, B...Flat packaged object, C...Packaging bag, 10... ...Opening and heat sealing jaws, 11.
... lower jaw, 12 ... machine frame, 16 ...
heat sealer, 14...F cylinder device, 15...upper jaw, 16...suction hole, 2
0...Bottom heat seal jaw, 21...
・Guide rail, 22...Moving frame, 26...
... lower jaw, 24 ... heat sealer, 25.
...serrated cutter, 26. old... upper jaw, 27.
...This member, 28... Relief groove, 29.
50...Transportation clamps, 61.32...
・F cylinder device, 36...Motor, 64
...Rack, 65 ...Pinion, 36
...Support stand, 67 ... Pivot, 68 ... F cylinder device. Patent applicant Taiyo Shokai Co., Ltd.

Claims (1)

[Claims] 1) Expanding the tip of a long, flat thermoplastic exterior tube band into a cylindrical shape, inserting a flat object to be packaged into the tube, and then crossing the front and rear exterior tube bands. The impulse-type heat-sealing jaws are clamped and welded by two pairs of clamp-type heat-sealing jaws, and at the time of welding, at the position of the bottom-side heat-sealing jaws of the two sets of heat-sealing jaws, a A method in which a continuous outer tube band is cut to form a sealed package, and when the two sets of heat sealing jaws are separated, the sealed package is dropped downward by its own weight and carried out, wherein the bottom side heat seal is removed. After the jaws have completed sealing the exterior tube strip, the heat sealer jaws of the other set are separated and moved upstream of the exterior tube strip by at least the sealing width dimension, and then the heat sealer jaws of the other set are separated. A packaging sealing method characterized in that separating a heat sealer is repeated every time weld. 2) A means for intermittently conveying a long, flat thermoplastic exterior tube strip in the horizontal direction, one bag long at a time, and holding the tip opening of the transported exterior tube strip from above and below; A pair of upper and lower opening and heat-sealing jaws that are once opened by adsorption or adhesion and then closed and heat-welded, and a pair of opening and heat-sealing jaws that are located at the bottom of the package upstream of the exterior tube band are A pair of bottom sealing jaws and a pair of sealing jaws are provided, which move toward and away from each other in synchronization with the sealing action of the jaws.
The heating method of these two sets of heat sealing jaws is an impulse seal type, and when the opening and heat sealing jaws adsorb or adhere to each other, and when the exterior tube band is opened, from this opening part to between the two sets of jaws. In an apparatus provided with a means for inserting a flat object to be packaged, the pair of bottom heat sealing jaws are provided so as to be able to move forward and backward in the conveying direction of the outer tube band, and after the sealing operation,
An operating means for causing the bottom heat sealing member to separate from the opening and heat sealer jaws in the phase pressure liquid, and to move slightly in the upstream direction of the outer tube band, and to return to the original position before the next phase pressure welding. and a sequence control device.