JPH0520285B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention takes out a flexible packaging bag one by one from the edge using a take-out tool, and moves the take-out tool to carry the packaging bag toward a packaging machine. (supply) relating to a method of supplying.

(Prior Art) Conventionally, the following two methods have been mainly used to transport packaging bags. One method is to suction the outer surface of the packaging bag with a vacuum suction cup attached to the tip of the swing arm, and transport the packaging bag by rotating the swing arm (see Japanese Utility Model Application No. 58-49705). The other method is to slightly widen the opening edge of stacked packaging bags with a vacuum suction cup, and tension the opening edge by stretching a pair of spatula-like bodies layered inside the opening edge in both directions. Transporting packaging bags by moving a spatula-like object while holding them (1986)
-Refer to Publication No. 118604).

(Problems to be Solved by the Invention) However, each method has the following drawbacks. That is, in the former case, especially in flexible packaging bags, the surface of the bag is locally sucked into the vacuum suction cup, forming wrinkles on the bag. Air leakage occurs between these wrinkles, and the vacuum is removed during transportation. The bag tends to fall off from the suction cup. Conveyor-type packaging machines, which prioritize efficiency, reciprocate at high speed with a swing arm equipped with a vacuum suction cup, which creates large wind pressure on packaging bags during transportation, making it impossible to completely prevent a small percentage of bags from falling off. .

On the other hand, in the latter method, the bag is supported by friction between a pair of spatula-shaped bodies and transported, but in order to withstand wind pressure and ensure support of the packaging bag, it is necessary to It has to be stretched out forcefully, and in the case of flexible bags, there is a problem in that the bag is stretched by the spatula overhang.

Therefore, the present invention provides a transportation method that eliminates these drawbacks.

(Means for Solving the Problems) The first aspect of the present invention is to suck and open the opening edge of the endmost stacked packaging bags with a suction member, and to open a spatula-shaped body formed by a hollow body. The spatula-shaped body is inserted into the inside of the opening edge, and the vacuum suction force acting on suction holes formed on both sides of the spatula-shaped body attracts both inner surfaces of the packaging bag, so that the spatula-shaped body and the packaging bag are integrated. After the packaging bag is transported to a packaging machine and held by a bag support element, the vacuum suction force acting on the inside of the spatula-like body is relaxed to remove the spatula-like body from the packaging bag.

Further, the second invention provides the method of sucking and opening the opening edge of the endmost one of the stacked packaging bags with a suction member, and inserting a spatula-shaped body formed by a hollow body into the inside of the opening edge, The vacuum suction force acting on suction holes formed on both sides of the spatula-like body attracts both inner surfaces of the packaging bag, and the spatula-like body and the packaging bag are transported together to a packaging machine to form a packaging bag. The flexible packaging bag is transported, characterized in that after being held by a bag support element, compressed air is sent into the inside of the spatula-like body, and the packaging bag is inflated by the compressed air blown out from the suction hole.

(Example) An example of the present invention will be described based on FIGS. 1 to 4.

In Fig. 1, A is a bag stacked on a table 10 in a bag loading area, and the table 10 checks the top surface of the bag using a limit switch 11 to ensure that the top surface of the bag is always at a constant height. .
A suction member, such as a rubber cup 12, provided at the upper part of the opening edge of the bag A is connected to a vacuum pump 14 via a switching valve 13, and the cup 12 is fixed to a bell crank 15, with a pin 16 serving as a fulcrum. The cup 12 is lifted by the rotation of the bell crank 15. As a result, the opening edge of the packaging bag A adsorbed to the cup 12 is lifted and opened.

On the other hand, a spatula-shaped body 20 is provided so as to face the opening edge of the packaging bag. As shown in FIGS. 2 and 3, the spatula-like body 20 flattens a hollow body and forms an appropriate number of suction holes 21 on both sides and the tip thereof, and connects the vacuum pump 14 and It is connected to the compressor 23. In addition, the spatula-shaped body 20 is fixed to the tips of levers 26 and 27 that swing up and down with a pin 25 as an axis, and a joint pin 28 is provided in the middle of the two levers 26 and 27, so that the lever 27 at the tip is unique. At the same time, the lever 27 is connected to the links 29 and 3.
0,31 to the power source. 35 more
The packaging machine receives the packaging bag by clamping both side edges of the packaging bag A with clamps of the packaging machine, but these clamps may be of a vacuum suction type.

When a vacuum is applied to the cup 12 and the opening edge of the bag A is lifted and opened, the links 29, 30, 3
1 rotates the lever 27 at the tip from the joint pin 28, and the spatula-shaped body 20 is inserted into the opening edge of the packaging bag A. In this case, compressed air is supplied to the spatula-shaped body 20 from the compressor 23 via the tube 24.
Therefore, as shown in FIG. 5, the spatula-shaped body 20 is inserted while inflating the packaging bag A by the air jetted back from the suction hole 21. Then, as shown in FIG.
By connecting the packaging bag A to the spatula-shaped body 20
is adsorbed to. Then lever 2 is moved by pin 25.
6 and 27 to transport the packaging bag A to the packaging machine, and after holding both side edges of the packaging bag by the bag support elements 35 formed by clamps as shown in FIG. 8, as shown in FIG. Then, the vacuum of the spatula-shaped body 20 is relaxed, and compressed air is blown into the packaging bag A as the case may be. The packaging bag A is inflated by narrowing the interval between the clamps 35 and at the same time blowing out compressed air from the spatula-shaped body 20 as described above, so the bag support element 35 is moved to another position and the ninth
As shown in the figure, the hopper 40 can be inserted into the packaging bag A to fill it with items to be packaged.

Note that Japanese Patent Application Laid-Open No. 59-62421 shows an example of the bag supporting element. This is a bag-shaped holder with an open top.A packaging bag is held in this bag-shaped holder, and the holder and bag are transported together while the bag is filled with the items to be packaged for packaging work. Something,
The present invention is also suitable as a method for supplying packaging bags to such a holder.

In FIG. 4, a cover plate 39 is provided on the top surface of a block 37 via a cylindrical bellows 38 to form an airtight chamber 40 within the bellows 38, and a coil spring 41 is provided around the bellows to also serve as a vacuum pump. It forms a compressor. That is, by pushing down the cover plate 39 via the pin 42, the air in the chamber 40 is pushed out through the passage 43 formed in the block 37, and conversely, by relaxing the pressing force of the pin 42, the coil spring 41
The chamber 40 expands due to the reaction force, and a suction force acts on the passage 43.

(Effects) The present invention inserts a spatula-shaped body into a packaging bag opened with a suction member, and both sides of the spatula-shaped body adsorb both sides of the inside of the bag for transportation, and the bag wraps around the spatula-shaped body. This makes it difficult for the opening edge of the packaging bag to open due to wind pressure, and also prevents the bag from swallowing more air than necessary. For this reason, the supporting force of the packaging bag is greater than the method of transporting the packaging bag by suctioning its outer surface with a vacuum suction cup, or the method of transporting the packaging bag by tensioning the opening edge of the packaging bag in both directions with a pair of spatulas. Furthermore, since the influence of wind pressure is small, packaging bags are less likely to fall off and bags can be transported reliably.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a perspective view showing a bag supported by a spatula-like body, Fig. 3 is a vertical sectional view of the previous figure, and Fig. 4 is a vacuum pump. The combined use with a compressor and FIGS. 5 to 9 are diagrams for explaining the operation. A...Packaging bag, 12...Cup (adsorption member),
13...Switching valve, 14...Vacuum pump, 15...
Bell crank, 20... spatula-shaped body, 21... suction hole, 22... switching valve, 23... compressor,
35... Clamp.

Claims (1)

[Scope of Claims] 1. Open the packaging bag by suctioning the opening edge with a suction member, insert a spatula-shaped body formed by a hollow body into the opening edge, and apply pressure to both sides of the spatula-shaped body. The vacuum suction force acting on the formed suction hole attracts both inner surfaces of the packaging bag, and the spatula-like body and the packaging bag are conveyed together toward the packaging machine, and the packaging bag is moved by the bag support element. A method for transporting a flexible packaging bag, characterized in that after holding the spatula-like body, the vacuum suction force acting on the inside of the spatula-like body is relaxed to remove the spatula-like body from the packaging bag. 2. Open the packaging bag by suctioning the opening edge with a suction member, and insert a spatula-shaped body formed of a hollow body into the opening edge, and act on the suction holes formed on both sides of the spatula-shaped body. Both inner surfaces of the packaging bag are attracted by the vacuum suction force, and the spatula-shaped body and the packaging bag are transported together toward the packaging machine, and the packaging bag is held by a bag support element. A method for transporting a flexible packaging bag, characterized in that compressed air is sent into the body and the packaging bag is inflated by the compressed air jetted out from holes formed in the spatula-shaped body.