JP3651908B2 - How to crease the corners of a square floor bag with a gusset - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to the opening of a square bed with gussets in bag-filling packaging, and the four sides of the square bed of a square bed with a gusset that can crease the four sides of the square bed of the opened square bed. The present invention relates to a crease method.
[0002]
[Prior art]
In the bag filling and packaging method of supplying a gusseted square floor bag made of a flexible packaging film having heat sealability to a predetermined position, filling the gusseted square floor bag with food, etc., and sealing the upper opening of the bag Since the gusset bag is folded flat when the bag is made, it is necessary to expand the gusset bag and form it into a square bed bag before filling. There are several conventional methods for expanding gusset bags and opening them into square-bed bags, but none of them can reliably crease the four sides of the square bed. The mandrel (No. 02-28167) of the bag filling and packaging machine seems to be able to crease the four sides of the square bed while the four corners of the square bed are expanded with the mandrel. When removed, the crease disappears.
[0003]
[Problems to be solved by the invention]
Therefore, in consideration of the above-mentioned points, regarding the opening of the square bed with gussets in the bag supply and filling packaging, in each side of the square bed of the square bed generally opened in the shape of the square bed bag, each side substantially There is a problem to be solved in terms of making a crease over a wide range.
The object of the present invention is to open a square bed with gussets in a bag-filling package, and make a clean square bed by making a crease on the four sides of the square bed of the square bed that is generally opened in the form of a square bed. It is an object of the present invention to provide a method for folding out the four sides of a square bed of a gusseted square bed bag that can be formed.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problem, the crease method of the square floor of the square floor bag with gussets according to the present invention has a proximal end fixed to the four side surfaces of the square block and a distal end with a corner in the same direction as the square block. Four crease plates extending in a cylindrical shape are relatively covered with a gusset bag opened in a square floor shape, and the tip of each crease plate is brought into contact with the square bed of the gusset bag, The four-sided stretching means provided on the inner side of the crease plate is stretched to the four crease plates so that the tip of each crease plate is projected outward so that the four sides of the square bed of the gusset bag are It is characterized by crease with strong pressure.
According to the crease method on the four sides of the square floor of the square bed with gusset, the four crease plates extending in a square tube shape from the square block are covered with the gusset bag opened in the square floor shape. The tip of each crease plate is brought into contact with the square bed of the gusset bag. In this state, by operating the four-way tensioning means provided inside the crease plate and pulling it on the four crease plates, the tip of each crease plate protrudes outward, and the corner of the gusset bag Make a crease by pressing the four sides of the floor.
[0005]
【Example】
An embodiment of the method of folding the square floor of the square bed of the gusseted square bag according to the present invention will be described with reference to the drawings. In the method of folding the square floor of the square floor bag with gussets according to the present invention, the gusset bag W produced in the flat folded state shown in FIG. 3 (a) is shown in FIG. 3 (b). The square bed bag W is generally opened to form a square bed bag W, and the square bed bag W is further creased in a straight line as shown in FIG. 3 (c).
[0006]
FIGS. 1A to 1F show a method of folding out the four sides of the square bed W1 of the square bed W with gussets according to the first embodiment. As shown in FIG. 1 (a), a pair of opposing open ends are adsorbed and opened by a pair of vacuum pads 4 and 4, whereby the gusset bag is generally opened and held. The base end 2a (upper end) is fixed to the four side surfaces of the square block 1 and the distal end 2b (lower end) extends downward in a rectangular tube shape below the square block 1 above the opened square bed W. Four thin metal folding plates 2 are positioned. The four-way stretching means 3 that also serves as a bag covering guide is arranged in a state in which a required dimension protrudes from the lower ends 2 b of the four crease plates 2.
Next, as shown in FIG. 1 (b), the square bed bag W sucked and held by the vacuum pads 4 and 4 is relatively lifted to cover the four folding plates 2. Four sides composed of a movable corner block 3b (see FIG. 1 (a)) whose upper and lower four edges are chamfered at the lower end of a support pipe 3a (see FIG. 1 (a)) inserted and guided in the corner block 1. A tensioning means 3 is attached. When the square floor bag W is put on the crease plate 2, the four-way stretching means 3 has the upper part of the movable corner block 3b that enters the four crease plates 2 and the lower part protrudes. So as not to get caught on the lower end 2b of the crease plate 2, and the square bed bag W smoothly covers the four crease plates 2.
As shown in FIG. 1 (c), the square bed bag W continues to rise even after the square bed bag W1 is placed on the lower ends 2b of the four folding plates, and the four-way stretching means 3 is movable in parallel with this. The corner block 3b is raised until it is pulled into the lower part of the four folding plates 2. The lower end 2b of the four crease plates expands in response to the stretching in the four directions by the movable angle block 3b, but does not expand until the square floor bag W covering the outside is stretched. Accordingly, as shown in FIG. 1 (d), the square bed W until the square bed W1 of the square bed W (see the portion attached in FIG. 1 (a)) abuts the lower end 2b of the folding plate 2. Can be raised.
Subsequently, as shown in FIG. 1 (e), the pair of chuck devices 5, 5 provided at the upper end of the square block 1 sandwich the upper end of the square bed bag W, and then the suction of the open end is released. The vacuum pads 4 and 4 are lowered to the lower part of the square bed bag W. Thereafter, the movable angle block 3b moves up in the four folding plates 2. When the movable angle block 3b is lifted, the movable angle block 3b projects the four crease plates 2 with the base end 2a as an axis, so that the lower end 2b on the bulge side is largely bulged outward, and the crease plate The lower end 2b of 2 is made, and the four sides of the square bed W1 of the gusset bag W are strongly pressed to make a crease in a straight line.
Thereafter, as shown in FIG. 1 (f), the lower part of the square bed bag W is sucked and supported by the pair of vacuum pads 4 and 4, and the upper end of the square bed bag W by the chuck devices 5 and 5 is released. Next, the movable corner block 3b descends and the lower end 2b of the crease plate 2 releases the strong pressure on the four sides of the square bed W1 of the gusset bag W. In this state, by lowering the vacuum pads 4 and 4 together with the square bed bags W adsorbed and supported by the vacuum pads 4 and 4, the square bed bags W can be removed from the crease plate 2. The square bed bag W is placed on a pallet (not shown) that circulates in the lower part and transferred to the filling station. Thus, the folding process is completed.
[0007]
2 (a) to 2 (d) are process diagrams showing a second embodiment of the method for folding out the four sides of the square bed of the gusseted square bed bag according to the present invention. As shown in FIG. 2 (a), a pair of opposed open ends of the square bed bag W are adsorbed and held by a pair of vacuum pads 4, 4, and the square bed bag W extends from the square block 1 into a square tube shape. The cover is moved relative to the sheet folding plate 2.
Next, as shown in FIG. 2 (b), the square bed W is raised until the square bed W 1 of the square bed W abuts the lower end 2 b of the crease plate 2, and a pair provided at the upper end of the square block 1. The upper end of the square bed bag W is clamped by the chuck devices 5 and 5.
Next, as shown in FIG. 2 (c), the vacuum pads 4, 4 are lowered to the lower part of the square bed bag W, and the movable angular block 3b provided in the four folding plates 2 is slightly lowered in size. Then, the bent portion 2c of the crease plate 2 is pressed outward by a wedge action with the movable angle block 3b, so that the movable angle block 3b is stretched about the base end 2a side of the four crease plates 2 as an axis. Thus, the lower end 2b on the overhanging side is greatly extended outward, the lower end 2b of the crease plate 2 is applied, and the four sides of the square bed W1 of the gusset bag W are strongly pressed to crease in a straight line.
Thereafter, as shown in FIG. 2 (d), the lower part of the square bed bag W is sucked and supported by a pair of vacuum pads 4 and 4, the holding of the square bed W1 bag W by the chuck devices 5 and 5 is released, and then movable. When the size of the square block 3b is slightly increased, the strong pressure of the lower end 2b of the crease plate 2 on the four sides of the square bed W1 of the gusset bag W is released. In this state, when the square bed bag W adsorbed and supported by the vacuum pads 4 and 4 is lowered, the square bed bag W can be removed from the crease plate 2.
The four-way stretching means 3 of this embodiment is not limited to the one described above. For example, although not shown, when the support pipe 3a is rotated, a pin protrudes in four directions to stretch the crease plate. You can also use what you have.
[0008]
【The invention's effect】
As described above, according to the crease method on the four sides of the square bed of the gusseted square bed bag according to the present invention, the opening of the gusseted square bed bag in the bag supply and filling packaging method is generally in the form of a square bed bag. You can crease the four sides of the square bed of the opened square bed bag. On each side of the square floor of the square floor bag, the edges of the plate-like crease plate enable continuous crease over substantially the entire range of each side. A floor bag can be formed.
[Brief description of the drawings]
FIG. 1 is a process chart according to a first embodiment of a method for folding a square floor of a square bed of a gusseted square bed bag according to the present invention.
FIG. 2 is a process chart according to a second embodiment of the method of folding out the four sides of the square bed of the square bed with gusset according to the present invention.
3A is a perspective view showing a gusset bag before opening the bag, FIG. 3B is a perspective view showing a state in which the bag is opened in the form of a square bed bag, and FIG. It is a perspective view which shows the state which performed the crease | folding of the four sides of a square floor.
[Explanation of symbols]
W ... gusset bag,
W1 ... Square floor of gusset bag,
1 ... square block,
2 ... crease plate,
2a ... the base end of the crease plate,
2b ... the tip of the crease plate,
3 ... Four-way stretching means,

Claims (1)

A four pieces of folds out plate square tip is base end fixed to a side surface of the corner block extending rectangular tube in the same direction than the angle block, covered relatively gusset bag is bag opening on the corner floor shape Te, each of the tip of the fold-out plate is in contact with the corner floor of the gusset bag, said taut the four-way bracing means provided on the inside of said fold-out panel to the four sheets of the fold-out plate each fold out plate the tip overhanging was strong pressure to the four-way side fold out the method of the corner floor gusseted angle bed bag, characterized in that the fold out the angle square edges of the floor of the gusset bag outward.

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