JPH02296627A - Improved bag opening device - Google Patents

Abstract

PURPOSE:To facilitate the insertion of an object to be packaged by a method wherein both sides of the inserting part and fitting part of a hanging tool are formed to project outward respectively from the center part. CONSTITUTION:It is desirable that after handle parts of an inserting part are inserted in pipe shaped holes, both parts can be combined assuredly and made to be hardly removeble. In this case, if the shape of the handles merely coincides with the shape of the holes, while the insertion is easy, they are easily removed. For this reason, elasticity in the bending direction is given to the curved inserting part, and two handles are made to project inward as shown by dotted lines when they are not being inserted. And when the handles are inserted in the pipe shaped holes, as sbown by solid lines, the inserting part 22 itself is pressed sligbtly inward, and the handles 21 are inserted in the pipe sbaped holes 23 under an approximately parallel condition, and the sbapes of the pipe shsped holes 23 and the inserting part 24 are kept as they are. Under the condi tion where the handles 21 are kept approximately in parallel, the inserting part tries to rethrn to the original condition where the inserting part elastically projects inward. For this reason. the bendles press the pipe shaped holes 23 inward, and the handles 21 assuredly combine with the pipe shaped holes 23.

Description

Detailed Description of the Invention (Field and Object of the Invention) The present invention is a method for automatically manufacturing bags (mainly made of synthetic resin) for packaging vegetables, processed foods, etc. using wind power. The present invention relates to an improvement of a bag opening machine that opens bags at different times.

Conventionally, it has been common practice to automatically open packaging bags using wind power. The applicant has already obtained a design right at the Office for the form of a bag opening machine that efficiently opens bags using wind power (Design Registration Application No. 9483 of 1988: Registration) No. 7537
No. 41).

As shown in FIG. 1(a), this bag opening machine has an insertion part 22 having a handle 21 for suspending the bag through a hole 11 in the upper part of the bag 1, and a hole 23 for inserting the handle. The bag is suspended by a suspension device 2 consisting of an inset part 24 having a
The bag is supported from behind by a support plate 3, and a blower 5 housed in a box-shaped container 4 located behind these generates wind, and the wind is sent to a suspended military system. (Although the hole 23 shown in Fig. 1 is pipe-shaped, the hole of the insertion part 24 is not necessarily limited to such a vibrator-shaped hole.
1st (In Figure a1, it is possible to simply use an inlet hole without providing a pipe.)

Insertion part 2 of a suspension device used in such a bag opening machine
2 has a structure in which a handle 21 is attached to a flat plate as shown in FIG. The inner fitting part 24 of the suspension device 2 was fixed to the side of the box container 4 (in Fig.
It is not drawn because it is on the back. ).

In this way, the bag l is suspended by the suspension device 2, and the sixth
As shown in the figure, the spring 32 causes the support plate 3 to press the bag to the front, blowing air against the bag in the front row (the bag closest to the insertion section 22), and when opening the bag, the first When a flat suspension device as shown in Figure 1(a) is used, the upper end of the bag is approximately separated between the insertion part and the insertion part of the suspension equipment as shown in Figure 2(a). It is suspended and supported in a straight line.

However, in such a straight line condition, if the position where the air blows from the blower is even slightly off from the opening of the bag in the front row, the top end of the bag will be surprisingly difficult to open (
The multiple points in Fig. 2(a) indicate the parts from which the wind is blown, but in Fig. 2(a), the part from which the wind is blown is the suspended bag at the frontmost position. Indicates that the upper opening of
a) Indicates the area from which the wind was blown, as in the case of the figure).

Even if the opening is opened, as shown in Fig. 2(b), the side with holes for hanging inside the bag still maintains a substantially straight shape, so the other side An aperture could only be obtained by opening the surface of the .

The object of the present invention is to improve the problems of the prior art in that it takes time and effort to open the aperture and that the aperture itself is insufficient.

(Structure of the Invention) The basic structure of the present invention includes an insertion part having a handle for suspending the bag through a hole provided in the upper part of one side of the packaging bag, and a hole for inserting the handle. A suspension device consisting of an inset part with a support plate supporting the bag from behind, and generating wind by a blower in a box container located behind the suspension device and the support plate, and supporting the bag of the suspension device. This bag opening machine is an improved bag opening machine that blows air to the area where the hanging device is being held.The insertion part and the fitting part of the suspension device are shaped so that both sides thereof successively protrude outward from the center part.

This will be explained below according to the drawings.

Figures 3(a), 3(b), and 3(C) show suspension devices used in the bag opening machine of the present invention, and in each case, both sides of the center sequentially protrude toward the front. It has a shape.

This circle section 3 (a) is an example in which an arc shape is adopted, FIG. 3 (b) is an example in which an elliptical arc shape is adopted, and FIG. 3 (C) is an example in which an isosceles triangle with equal sides is used. This is an example in which a shape is adopted.

In this way, when using an insertion part and a fitting part in which both ends of the center part protrude forward, the bag also has a fourth part.
As shown in the figure, the bag will be suspended in the same condition as the general bag and the inset bag, so the air sent from the blower will always hit the top of the suspended bag. The bag hanging in the front position will open quickly (FIG. 4 shows the case where a substantially arcuate insertion portion and fitting portion are used).

By the way, it is desirable that after the handle part of the insertion part is inserted into the hole of the pipe of the insertion part, the two parts can be reliably connected and not easily separated.

In this case, if the shape of the handle and the hole simply match, it can be easily inserted, but it also tends to come off easily.

For this reason, as shown in Fig. 5, if the curved insertion part is made to have elasticity in the bending direction, and when it is not inserted, the two handles protrude inward as shown by the dotted lines in Fig. 5. When inserting the handle into the pipe-shaped hole, as shown by the solid line in FIG. ,
The shapes of the pipe-shaped hole 23 and the insertion portion 24 will be maintained as they are.

When the handle 21 is maintained substantially parallel, the insertion portion elastically tries to return to its original state of protruding inward, so the handle presses the pipe-shaped hole 23 inward. 21 will be reliably connected to the pipe-shaped hole 23 (in Fig. 5, a pipe-shaped hole is used as the hole 23, but this type of shape is the most secure connection to the handle 21). (However, the hole 23 is not limited to this shape.)

In the conventional bag opening machine, as shown in FIG. 6, the bag is pressed by elastic springs 32 having planar support plates fixed to both sides.

This is because the air is sequentially blown through the many bags suspended from the handle of the insertion section to send the bags to the front area.

However, in the prior art, the action of the support plate 3 using springs is limited to this.

In the present invention, when the back support plate presses against the bag by the spring 32, the upper end of the hole side of the bag is sandwiched between the insertion part and the fitting part of the suspension device and is securely fixed. On the other hand, the lower part is pushed out to the entire surface by the support plate 3 or the protruding plate 31 fixed to the support plate 3 (FIG. 7 shows the state in which the protruding plate 31 is provided, 31 itself is not an essential requirement for the invention of the present application).

The upper part of the side 12 of the bag 1 to which the hole 11 is attached is fixed between the insertion part 22 and the fitting part 24 of the suspension device 2, so it hardly deforms, but the other side 13 As shown in FIG. 8, in the case of the bag in the front row, the upper part of the bag tends to move forward due to the pressure, so it partially separates from the surface 12 where the hole 11 is provided, causing wrinkles. The state will be as follows.

For the side 12 of such a bag where the hole 11 is provided,
When the other surface 13 is partially detached from the opening due to the formation of wrinkles, the air from the blower is extremely likely to enter.
The bag will be opened immediately.

That is, in the present invention, pressing the bag from behind with the support plate has an extremely effective effect in opening the bag.

(Effects of the Invention) In this way, in the present invention, by using a suspension device having a shape in which both sides protrude forward from the center part, the bag itself basically becomes easier to open, and the clothes can be held from behind by the support plate. 3 or the protruding plate 31 attached thereto, at the opening of the bag located in the front row, one side becomes fused from the other and a detached state occurs. The bag opens quickly and seamlessly, making it extremely convenient.

As shown in Figure 4, in the state in which the matakuri is open, one side is already curved along the shape of the suspension device, and the other side is widened by opening, so it opens from both sides. This makes it extremely easy to insert the object to be packaged.

As described above, the invention of the present application has various advantages in opening a bag, and therefore has great value.

[Brief explanation of drawings]

Figure 1(a): Schematic diagram showing a state in which a bag is suspended by a hanging device in a conventional bag opening machine. Figure 1 (b1): Schematic diagram showing the overall structure of a conventional bag opening machine. Figure 2(a): Conventional diagram. Figure 2(b) is a top view showing the upper end of the bag when a conventional suspension device is used; Figure 3(a) is a top view showing the bag opened when a conventional b) Figure 3 (C)N: Top view showing an embodiment of the bag suspension device of the present invention. Figure 4: When a bag is suspended from the bag suspension device of the present invention,
Fig. 5 is a plan view showing that the wind always passes through the entrance of the bag and that the bag is open on both sides: By giving the insertion part bending elasticity, the insertion part and the fitting part can be reliably connected. Figure 6: A top view showing an example of a possible embodiment; a side sectional view showing a mechanism in which the support plate sequentially pushes the bags forward using elastic springs; Figure 7: The support plate has both sides protruding forward in the same way as a suspension device. Schematic diagram showing the state in which a protruding plate with a shape is installed Figure 8: When the bag is pressed from behind by the support plate or the protruding plate, one side of the bag separates from the other side in a fused shape at the top of the bag. A top view showing that the side of the bag with the hole 11 is on the side of the bag that does not have the hole 11 21 - Handle 22 - Vibrator with a hole into which the insertion part handle is inserted 24 - Insertion part support board
31.Protruding plate 32.Spring box container blower

Claims (6)

[Claims] (1) A suspension device consisting of an insertion part having a handle for suspending the bag through a hole provided in the upper part of one side of the packaging bag, and an insertion part having a hole for inserting the handle. A bag that is equipped with a support plate that supports the bag from behind, generates wind by a blower in a box container located behind the suspension device and the support plate, and sends the wind to the part of the suspension device that supports the bag. An improved bag opening machine in which the insertion part and the fitting part of the suspension device are shaped so that both sides thereof successively protrude outward from the center part. (2) The improved bag opening machine according to claim (1), wherein an arcuate shape is adopted as the shape for protruding both sides. (3) The improved bag opening machine according to claim (1), wherein an elliptical arc shape is adopted as the shape in which both sides protrude forward. (4) Claims (1) characterized in that both sides of an isosceles triangle are adopted as the shape that protrudes in all directions.
) Improved bag opening machine described in ). (5) The improved bag opening machine according to claim (1), wherein the plate supporting the handle of the insertion portion of the suspension device has elasticity in a bending direction. (6) The improved bag opening machine according to claim (1), wherein the support plate presses the bag from behind with spring elasticity.