JPS6335934Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is an automatic packaging device that seals the opening of resin bags containing various foods, luxury items, and other items. The invention relates to a device for eliminating.

[Conventional technology]

After storing a certain amount of goods in a plastic bag made of polyethylene or the like, when the mouth of the plastic bag is sealed, the bag becomes bulky as air remains trapped inside the bag, making it difficult to pack a large number of bags into boxes. In some cases, it may not be possible to stack the required number of bags in a box, and the bags are inflated by the air inside, making them easy to tear and difficult to handle.

For this reason, a degassing packaging device has been invented, for example, as disclosed in Japanese Patent Application Laid-Open No. 57-8622, which deaerates the bag before sealing the opening of the bag.

As shown in Figs. 7 to 9, this deaerator is equipped with a chamber with a through hole on the bottom installed above a belt conveyor for conveying bags, and one end connected to a vacuum pump. A pair of bag opening clamping belts rotating in opposite directions and rotating in synchronization with the conveyor belt are placed along the lower part of the through hole C of the chamber. The mouth portion of the bag is clamped and the bag is passed through the gap C, the pressure inside the bag is reduced, and the bag is transported to the sealing mechanism H.

[Problem that the invention attempts to solve]

However, with this device, it is difficult to always align the clamping pieces T and T' that clamp the opening of the bag, and the bag cannot be clamped accurately. Also,
Even if they fit well and are clamped, the bag will be clamped with the mouth part of the bag partially open, as shown in Figure 9. There was a problem in that the liquid flowed into the bag again and the bag became bulky.

The present invention was developed in view of these problems. After the air inside the bag is sucked out, it is sent to a clamping belt that completely closes the mouth of the adjacent bag. To provide a bag deaeration device for an automatic packaging device that seals and prevents air from entering the bag.

[Means for solving problems]

In order to achieve the above object, the bag deaeration device in the automatic packaging device of the present invention is designed to prevent the bag from being removed while the bag is being moved by a pair of upper and lower gripping belts 6 and 7 that grip the bag with the mouth of the bag completely closed. A pair of upper and lower heaters 8, 9 for sealing the openings are provided, and a horizontal belt conveyor 2 for placing bags along the clamping belts 6, 7 is provided. An air suction port 11 that opens toward the extension line of the clamping surfaces of the clamping belts 6 and 7 is provided on the bag opening feeding side with respect to the clamping belts 6 and 7, and the edge of the bag opening is slid into the air suction opening 11. It is characterized in that a plurality of vertical bars 12 are arranged in parallel in contact with each other.

[Effect]

The belt conveyor 2 and the upper and lower gripping belts 6 and 7 are rotated at the same speed, and while both sides of the bag a containing the articles are manually picked, the bag a is placed on the conveyance start end of the belt conveyor 2. When the bag a is placed with its bottom slidingly in contact with the guide plate 17, the bag a is conveyed as the belt conveyor 2 advances and immediately reaches the position of the suction port 11 of the suction box 10. The end edge is the sliding contact inner surface 1 of the mouth end of the suction port 11
It passes through sliding contact with 3.

During this passage, the exhaust action from the suction box 10 side generated by the operation of the air suction pump reaches into the bag a from the opening of the bag a through the suction port 11, and the air inside the bag a is transferred to the suction box 10, Piping 16
At the same time, the inside of the bag is degassed and depressurized by the suction force from the suction box 10, and the both side walls of the bag a are plastically deformed in the direction of approaching each other, and along the surface of the bag. It compresses while sticking tightly and eliminates swelling.

In this way, the mouth part b of the bag a passes through the suction port 11 of the suction box 10 in a horizontal manner, so that the inside of the bag is sufficiently deaerated and the bulge of the bag is compressed, and one side of the bag a is Immediately after the edge passes through the suction port 11, release the hand on one side and hold the upper and lower gripping belts 6,
One side edge of the opening of the bag a is held between the holding surfaces of 7,
Next, the user releases the other hand and allows the opening b of the bag a to be completely held between the upper and lower holding belts 6 and 7, thereby sealing the opening b.

The suction port 11 of the suction box 10 is adjacent to the clamping belts 6, 7 in a very close state, and the bag a whose interior has been evacuated is instantly fed into the clamping belts 6, 7, and is conveyed rearward to the upper and lower pairs. The heaters 8 and 9 of the opening part b
are sealed under heat and pressure.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a machine frame, and a horizontal belt conveyor 2 is disposed at the lower side of the frame. It extends endlessly between rolls 4 and 5 which are rotatably supported on the front and rear ends of the roll, and one of the rolls 4 is rotated by an appropriate drive mechanism to move it around.

Reference numerals 6 and 7 designate a pair of upper and lower steel or glass fiber narrow band-shaped clamping belts disposed along the upper edge of one side of the mounting surface of the belt conveyor 2 on the side surface of the machine frame 1. Pulleys 18, 19 and pulley 2 are rotatably supported on the front and rear ends of the side surfaces of the
0 and 21 in an endless manner and move in the direction of the arrow by an appropriate rotational drive mechanism, and the belt conveyor 2 on the opposing clamping surfaces
The height relative to the belt conveyor 2 is approximately equal to the position of the opening b of the bag a placed on the belt conveyor 2.

Reference numerals 8 and 9 designate a pair of upper and lower sealing heaters that are disposed at appropriate positions in the middle of the transition of the upper and lower gripping belts 6 and 7 so as to pinch the upper and lower gripping belts 6 and 7.

Reference numeral 10 designates a suction box disposed close to the bag supply side of the upper and lower clamping belts 6 and 7, and has a suction port 11 formed in a horizontally long rectangular shape.
A plurality of vertical bars 12 are installed at small intervals on the open end of the bag 1, and these vertical bars 12 form a sliding guide surface 13 for the mouth edge of the bag a, and the suction port 11 is connected to the clamping belts 6, 7. The guide surface 13 is oriented perpendicularly to the extension line of the clamping surface, and the guide surface 13 is aligned with the extension line.

Reference numerals 14 and 15 indicate upper and lower guide protrusions formed by projecting the upper and lower wall surfaces of the suction port 11 outward.

A piping 16 is connected to the lower part of the suction box 10 and is connected to the suction port side of an air suction pump (not shown) disposed at a proper position in the machine frame 1.

Reference numeral 17 denotes a bottom receiving guide plate for the bag a, which is arranged along the length direction on the outer upper surface of the frame 3, and its position can be adjusted in the width direction of the belt conveyor 2 according to the size of the bag a. be.

A bag A made of synthetic resin such as polyethylene or polypropylene for storing articles is formed into a flat rectangular shape with folds A and B on both sides, and the bag A is made of a synthetic resin such as polyethylene or polypropylene. When a certain amount of items are stored, bag a becomes inflated due to the stored items.

To describe the usage state of the present invention configured as described above, the belt conveyor 2 and the upper and lower gripping belts 6 and 7 are used.
The bags A containing the articles are moved around at the same speed, and while both sides of the bag A containing the articles are manually picked, the bag A is placed on the conveyance start end of the belt conveyor 2, and the bottom of the bag A is slid onto the guide plate 17. When the bag a is placed on the bag as the belt conveyor 2 advances, it immediately reaches the position of the suction port 11 of the suction box 10, and the edge of the mouth b of the bag a is aligned with the mouth end of the suction port 11. It passes while slidingly contacting the edge sliding contact guide surface 13.

During this passage, the operation of the air suction pump causes the air in bag a to flow from the opening of bag a through the inlet port 11 into the bag a, and the air in bag a to the suction box 10 and the piping 16.
When the inside of the bag is degassed and depressurized by the suction force from the suction box 10,
The two side walls of the bag A are plastically deformed in the direction of approaching each other, and are compressed while coming into close contact with the surface of the article, thereby eliminating any bulge.

The suction force of the suction box 10 is adjusted by a suction force adjustment ring 28 (see Fig. 6) provided at an appropriate position on the piping 16 depending on the type of article stored in the bag, and the suction force of the suction box 10 is adjusted depending on the type of article stored in the bag. To enable degassing without suction movement in the direction of escape.

This ring body 28 is fitted in a suitable position of the pipe 16 so as to be rotatable in the circumferential direction, and a portion thereof has a through hole 28.
9 is bored, and the suction force of the suction port 11 can be adjusted by changing the overlapping area of the through hole 29 and the through hole 30 bored in the pipe 16.

In this way, the mouth part b of the bag a passes through the suction port 11 of the suction box 10 in a horizontal manner, so that the inside of the bag is sufficiently deaerated and the bulge of the bag is compressed, and one side of the bag a is Immediately after the edge passes the suction port 11, release your hand on one side and remove the upper and lower gripping belts 6,
One side edge of the opening of the bag a is held between the holding surfaces of 7,
Next, the user releases the other hand and allows the opening b of the bag a to be completely held between the upper and lower holding belts 6 and 7, thereby sealing the opening b.

The suction port 11 of the suction box 10 is adjacent to the clamping belts 6 and 7 in a very close manner, and the bag a whose interior has been evacuated is instantly fed into the clamping belts 6 and 7, and is conveyed rearward and upward and downward. A pair of heaters 8 and 9 thermally and pressure-seal the opening b via clamping belts 6 and 7.

[Effect of idea]

As described above, according to the bag deaeration device in the automatic packaging device of the present invention, before the bag mouth is fed between the clamping belts, the air suction port is opened with the bag mouth fully open. Since the bag is passed through, the air inside the bag can be quickly and reliably discharged, and this degassing compresses the bag and makes it flat, and the bag adheres closely to the surface of the stored items, eliminating bulk. It is something that can be done.

In addition, it is possible to remove the air that exists between the items stored in the bag, eliminating the possibility of the bag bulging due to air, making subsequent handling and packaging operations smoother, and ensuring that the specified number of items are kept in the box. It can be reliably accommodated.

In addition, multiple vertical bars are installed in parallel at the air suction port, and the bag opening edge is slid against the vertical bars to evacuate the inside of the bag, so the bag opening is always kept in a predetermined position. The bags can be fed so that predetermined portions of all bag openings are held between a pair of upper and lower clamping belts, and the bag openings can be accurately welded by a subsequent heater.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a simplified plan view, FIG. 2 is a front view, FIG. 3 is a side view, and FIG. 4 is a vertical sectional view of the suction box.
Fig. 5 is a cross-sectional view thereof, Fig. 6 is a sectional view taken along the line A-A in Fig. 2, Fig. 7 is a side view of the conventional degassing device, and Fig. 8 is a sectional view taken along the - line in Fig. 7. , FIG. 9 is a plan view taken along the - line in FIG. 8. 1... Machine frame, 2... Belt conveyor, 6, 7...
... Holding belt, 8, 9 ... Seal heater, 10
...Suction box, 11...Suction port.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower clamping belts 6, 7 that clamp the bag with its mouth completely closed are provided with a pair of upper and lower heaters 8, 9 for sealing the mouth of the bag in the middle of the movement of the clamping belt 6, 7. A horizontal belt conveyor 2 on which bags are placed is disposed along the line 7, and the clamping belts 6, 7 are placed on the bag opening feeding side of the clamping belts 6, 7 on the bag conveyance starting end side of the horizontal belt conveyor 2. Bag removal in an automatic packaging device in which an air suction port 11 that opens toward the surface extension line is disposed, and a plurality of vertical bars 12 are arranged in parallel to bring the edge of the bag mouth into sliding contact with the air suction port 11. Air device.