JPS6099824A - Automatic sealing device for injection port of heavy-duty packaging bag - 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 The present invention relates to an apparatus for automatically thermally sealing an inner-valve double-bottomed packaging bag filled with powder or granules such as wheat flour. be. In the present invention, a heavy packaging bag is
The term refers to a wide range of bags such as paper bags, laminate bags, plastic molded bags, etc., but below, paper bags will be explained as a representative example.

BACKGROUND ART Conventionally, internal valve type paper bags have been widely used, in which powder or granular material is injected through an internal valve opening and the valve opening is closed by the pressure of the contents filled inside the bag. However, there are problems such as the powder inside the bag leaking out of the bag through the injection port when the bag is transported or stored.

Therefore, the injection port needs to be tightly sealed.

Conventionally, this injection port sealing work has been performed by complicated manual work. However, since it is necessary to perform a large amount of very complicated work, for example,
An automatic sealing machine such as that disclosed in No. 9 has been developed. This kind of automatic machine is applicable to square bottom bags, and
The protruding outer valve opening was bent 1110 degrees along the bottom of the bag to suppress the spring, which was a cumbersome process that was not only very inconvenient, but also caused problems with the device itself. The structure was complicated. Further, when a paper bag filled with powder or granules is pressed, the contents may be ejected from the valve opening due to uneven distribution of the contents.

The inventors of the present application have already proposed Japanese Patent Laid-Open No. 58-82829 as a technique for solving such problems. Although it is possible to satisfactorily heat seal the powder injection opening of a heavy packaging bag with this device, it is desired to develop a device with a simpler structure and equivalent heat pricking function. was.

Therefore, the present invention is applied to an inner-type double-bottomed wrapping paper bag that seals the injection port to eliminate the defects of the conventional inner-valve-type bottom-stick bags, and is designed to prevent the contents from entering when the injection port is densely packed. An object of the present invention is to provide an automatic sealing device for an injection port of a regular wrapping paper bag, which can reliably, strictly, and automatically seal a powder injection port without causing problems such as spouting of particles.

According to the first aspect of the present invention, the conveying means for heavy packaging bags (
An automatic sealing device for a filling port of a heavy packaging bag, which is equipped with a
Usually, it stays at the initial position in the direction that is almost perpendicular to the direction of transport of the heavy packaging bag, and heat seals while rotating by engaging with the sealing part of the heavy packaging bag, and after sealing, it returns to the initial position. A heat sealing means having a heater that returns to its original position normally remains at an initial position in a direction approximately perpendicular to the transport direction of the heavy packaging bag, and after heat sealing, rotates by engaging with the heat sealing portion of the bag. There is provided an automatic filling port sealing device for a heavy packaging bag, comprising a post-processing means having a pressing member that compresses and shapes the sealing portion and returns to the initial position after the compression shaping. .

According to a second aspect of the present invention, there is provided an automatic sealing device for a filling port of a heavy packaging bag, which is attached to a conveying means for a heavy packaging bag, wherein the initial stage is generally perpendicular to the transport direction of the heavy packaging bag. A heat sealing means having a heater that stays at a position and rotates while translating with the bag by engaging with the punctured part of the heavy packaging bag, and returns to the initial position after arrival; stays at an initial position in a direction substantially perpendicular to the transport direction of the heavy packaging bag, and after heat sealing, rotates by engaging with the heat sealing part of the bag, compressing and shaping the sealing part. There is provided an automatic sealing device for an injection port of a heavy packaging bag, comprising a post-processing means having a suppressing member that returns to the initial position after shaping.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the inlet sealing device for a heavy-duty paper bag according to the present invention will be described in detail with reference to preferred embodiments shown in the drawings.

FIG. 1 shows the structure of an internal valve type double-bottomed paper bag 1 applied to the device of the present invention. This paper bag 1 has both bottom surfaces (first side surfaces) sealed, a jt (not shown) is provided on one bottom surface as shown in the figure, and a sealing piece 2 is provided on the bottom surface to cover the valve opening. I,
A powder inlet 5 is formed between the bottom piece 6 to which the sealing piece 2 is attached and the bottom piece 7 below it. The sealing device of the present invention heat-seals the bottom part 4 of the paper bag 1 and the loose part 3 of the sealing piece 2 to firmly and automatically seal the injection port 5.

FIG. 1 shows a plan view of the automatic injection port sealing device of the present invention, and FIG. 2 shows a side view thereof. The belt conveyor 11 is constructed by mounting rollers 14 on a frame 13 supported by pillars 12, and having endless bells 15 wound around these rollers 14. The parts that perform heat sealing are Bell I and Conveyor 1.
1 frame 13, and is comprised of a heat sealing means 16 and a post-processing means 17 in order from the upstream side.

The heat sealing means 16 includes an arm 19 rotatably mounted on a support 18 fixedly erected on the frame 13, a heater 20 attached to the free end of the arm, and this arm 19.
It consists of a tension spring 22 stretched between the base side of the bell and a stand 21 on the frame 13, and a stopper 23 fixed on the frame 13 so as to stop the arm 19 at a predetermined angle with respect to the bell) 15. .

The post-processing means F shapes the part where the loose piece 3 of the sealing piece 2 of the packaging bag 1 and the bottom pieces 6 and 7 are heat-sealed by the heat-sealing means 16 on the second-stream side. This is to ensure complete sealing, and the structure is exactly the same except that a hard-bristled brush 24 is provided on the arm 25 instead of the heater 20, so detailed explanation thereof will be omitted. , the same parts are indicated by the same numbers. However, since it is not necessary to have the same structure, you are free to change the design as necessary. A brush is most suitable, but any other device having a similar suppressing and shaping effect, such as a push plate, may be used.

Further, it is preferable to provide a guide 26 for the heavy packaging bag opposite the portion where the heat M attaching means 16 and the post-processing means 17 described above are provided.

If it is desirable to bring the heater 2o of the heat sealing means 16 into contact with the sealing part of the heavy packaging bag 1 for a longer period of time to achieve more complete heat sealing, it is possible to do so as shown diagrammatically in FIG. It is better to configure That is, in addition to the configuration shown in FIG. 2, a kite rail 27 is provided on the frame 13 in parallel with the conveyor heald 15, several sliders 28 are placed on this power idle rail 27, and the shaft 18 is placed on this slider. Place the arm 19 upright and attach the tension spring 29 between the slider 28 and the stand 21 on the frame 13.
;, set up. Thereby, when the heater 2o engages with the packaging bag l, it rotates while moving in the moving direction of the belt 15, so that the bag can arrive more completely. It should be noted that the tension springs 22 and 294 may be constructed using fluid operating means such as air or hydraulic pressure.

Next, the operation of the automatic sealing device for the injection port of the heavy packaging bag for unreleased IJJ will be briefly explained with reference to the fourth drawing.

The heavy packaging bag l carried on the conveyor belt 15 moves in the direction of the arrow 3° as shown in FIG. 4a. At this time, 7-A19 of the heat sealing installation work 6 and the arm 25 of the post-processing means 17 come into contact with the stopper 23 due to the action of the tension spring 22, and the heater 20 and the brush 24
protrudes above the belt 15 in a direction substantially perpendicular to the moving direction of the belt 15 so as to be able to engage with the sealing part 31 of the bag 1.

When the bag 1 hits the guide 26, its position is adjusted appropriately, and the bag moves forward, the sealing part 31 of the bag 1 first closes, as shown in FIG.
contacts the heater 2o and rotates it around the shaft 18 against the tension spring 22. During this time, the sealing section 3 of the bagmaker
1 comes into contact with the heater 20 and is heated and heat-sealed.

When the heat sealing of the sealing part 31 of the bag l is completed as shown in FIG. 31, and while shaping it, it blends in with even more gaps and seals completely.

As the bag l advances further along with the belt conveyor, as it no longer comes into contact with the bag 1, the heater 20 and then the brush 24 move counterclockwise around the shaft 18 under the action of the tension spring 22, as shown in FIG. 4d. 4th direction.
It returns to the initial state shown in Figure a and is ready to heat seal the next bag. In this way, the bags 1 are sealed one after another.

In the example described with reference to FIG. 3, as the sealing part 31 of the bag 1 comes into contact with the heater 20 and moves forward to push it, the tension spring 29 expands and the slider 28 moves together with the conveyor heald 15. When the tension spring 29 reaches its limit, the slide 3t' 2 B stops and the heater 20 starts rotating against the tension spring 22. Therefore, when the slider 28 is moved, the heater 20 and the sealing part 3 of the bag l are
1 contact, that is, the heating time is longer, and the heat sealing is more complete.

As is clear from the above explanation, in the apparatus of the present invention, only the sealing part of the heavy packaging bag is heated and sealed by the heater by rotational movement or translational and rotational movement of the heater, and then this heat sealing is performed. Since the bonded portion is post-processed by suppressing it with a brush, the heat sealing is completed perfectly, and this sealing device has an extremely simple structure and excellent work efficiency.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a heavy-duty packaging bag, FIG. 2 is a plan view of an automatic sealing device for an injection port of a heavy-duty packaging bag according to the present invention, FIG. 3 is a side view of the same, and FIG. FIG. 5 is a diagrammatic plan view illustrating the operation of the apparatus of the present invention. Explanation of symbols ■... Heavy packaging bag, 2... Seal piece, 3...'ML rim, 4... Bottom, 5... Inlet, 6.7... Bottom piece, 11... Belt conveyor, 12... Support, 13
... Frame, 14... Roller, 15... Belt, 16... Heat sealing means, 17... Post-processing means, 18
...Axis, 19...Arm, 20...Heater, 2
DESCRIPTION OF SYMBOLS 1...Stand, 22...Tension spring, 23...Stopper, 24...Brush, 25...Arm, 26...
... Guide, 27 ... Guide rail, 28 ... Slider, 29 ... Tension spring, 30 ... Movement direction, 31
...Sealing part patent applicant Kuchisei Seifun Co., Ltd. Figure 5 Figure 5 Procedural correction blind action) % formula % 1. Indication of the case 1982 Patent Application No. 205502 2. Name of the invention Automatic sealing device for filling inlet of heavy packaging bags 3. Person making the amendment Related Patent Applicant Address: 19-12 Kokinumachi, Nihonbashi, Chuo-ku, Tokyo Name: Nisshin Seifun Co., Ltd. 4, Agent: 101 Telephone: 864-4498 Address:
January 3, 1982, 3-2-2 Iwamotocho, Chiyoda-ku, Tokyo
11'' August 1, 1980 1, Indication of the case 1988 Patent Application No. 2055 (>2 No. 2, Name of the invention Automatic sealing device for injection ports for heavy packaging bags 3, Person making the amendment Relationship to the case Patent Applicant address: 19-12 Kokinumachi, Nihonbashi, Chuo-ku, Tokyo Name: Nisshin Seifun Co., Ltd. 4, Agent: 101 Telephone: 864-4498 Address:
3-2-2-6 Iwaki-cho, Chiyoda-ku, Tokyo Contents of amendment (1) "Figure 1" on page 6, line 12 of the specification is corrected to "Figure 2." (2) "Figure 2" on page 6, line 13 is corrected to "Figure 3." (3) "Figure 3" on page 8, line 5 of the same page has been changed to "Figure 4".
Correct. (4) "Figure 4" on page 8, line 20 is corrected to "Figure 5." (5) Change “Figure 4a” in the second line of page 9 to “Figure 5a”.
Corrected to ``Figure''. (6) Change “Figure 4b” on page 9, line 11 to “Figure 5.
Corrected to “Figure b”. (7) Change “Figure 2b” on page 9, line 16 to “Figure 5.
Corrected to “Figure b”. (8) On page 9, line 20, [Perform arrival completely. ”, then insert “(see Figure 4C)”. (9) Change “Fig. 4d” in the 4th line of page 10 to “Fig.
Corrected to ``Figure d''. (10) Correct "Figure 4a" in the 5th line of page io to "Figure 5a". (11) “Figure 3” on page 1O, line 8 of the same page was replaced with “Figure 4.
Corrected to ``Figure''. (12) “Figure 4” of the drawing will be corrected as shown in the attached sheet.

Claims (4)

[Claims] (1) An automatic sealing device for the injection port of heavy packaging bags, which is attached to the conveying means for heavy packaging bags, and normally stops at an initial position in a direction approximately perpendicular to the transport direction of the heavy packaging bags. A heat sealing means having a heater that performs heat sealing while rotating by engaging with the sealing part of the bag and returns to the initial position after sealing; a suppressing member that remains at an initial position in the direction, and after heat sealing, rotates by engaging with the heat sealing part of the bag to suppress and shape the sealing part, and returns to the initial position after the suppression shaping; 1. An automatic sealing device for an injection port of a heavy packaging bag, comprising: a post-processing means having a post-processing means. (2) The automatic sealing device for an injection port of a heavy packaging bag according to claim 1, wherein the suppressing member is a hard brush. (3) An automatic sealing device for the filling port of heavy packaging bags, which is attached to the transportation means for heavy packaging bags, and normally stops at an initial position in a direction approximately perpendicular to the transport direction of heavy packaging bags. A heat sealing means having a heater that performs heat sealing while rotating and translating with the bag due to engagement with the sealing part of the bag, and returns to the initial position after sealing, and a heat sealing means having a heater that returns to the initial position after sealing, and usually the direction in which the heavy packaging bag is transported The bag remains at an initial position in a direction substantially perpendicular to the bag, and after heat sealing, it rotates by engaging with the heat sealing part of the bag to compress and shape the sealed part, and after the compression shaping, returns to the initial position. 1. An automatic electrical sealing device for an injection port of a heavy-duty packaging bag, comprising a post-processing means having a suppressing member that returns to its original state. (4) The automatic electrical sealing device for an injection port of a heavy packaging bag according to claim 3, wherein the suppressing member is a hard brush.