JPH0911198A - Punching vessel and punching edge - Google Patents

Abstract

PURPOSE: To provide a punching vessel and a punching edge hardly breaking a wrap film for packaging. CONSTITUTION: This punching vessel is constituted so that it is provided with a vessel main body 3 having an opening 2 on an upper side and a flange-like part 4 projecting in the horizontal direction on a circumference of the opening 2, and a peripheral edge part 5 of the flange-like part 4 is formed into a waveform composed of mountain parts 5a and valley parts 5b in a view in the horizontal direction. A punching edge is constituted so that a cutting edge of which mountain parts 5a and valley parts 5b are alternately cut is provided on an extreme end part of a barrel-like main body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching container and a punching blade used for punching the punching container.

[0002]

2. Description of the Related Art Conventionally, a punching container 100 such as a strawberry pack obtained by punching a resin-molded sheet has a container body 1 having an opening 101 on the upper side as shown in FIG.
02 and a flange-shaped portion 103 protruding horizontally around the opening 101 are generally used.

A punching die 110 for obtaining such a punching container 100 is shown in FIG. This punching type 110
Is a relatively thick iron plate 111 in which a punching blade 112 having a square tubular cutting edge and a flat cutting edge is planted so as to penetrate the iron plate 111. This punching blade 112 is the lower die 12
No. 0 is inserted into a shearing hole 121 that is slightly larger than the punching blade 112, and the sheet 130 is cut by the shearing between the corner 122 of the lower die 120 and the tip of the punching blade 112. It is punched and the punching container 100 is obtained.

[0004]

However, the punching container 100 is usually used for putting products and wrapping them with a wrap film for display. There is a problem that the peripheral edge portion 104 acts like a knife and the wrap film for packaging is cut.

Further, since the punching blade 112 has a flat cutting edge, the entire cutting edge comes into contact with the sheet to be processed 130 during punching, and the portion of the cutting line of the sheet to be processed 130 is temporarily cut. A very large shearing force is applied to the corners 122 of the lower die 120 and the punching blade 1 by repeating the punching.
If the fitting with 12 is even slight, there is a problem that the lint of the sheet to be processed 130 is generated in this shearing and adheres to the punched end. Further, due to the large shearing force, the sheet 130 to be processed has a crack at the punched end portion due to the material, the punched end portion is deformed, and the punched end portion is distorted due to the temperature after the distortion remains. There is also a problem.

The present invention has been made to solve the above problems, and a first object of the present invention is to provide a punching container in which a wrap film for packaging is difficult to cut. It is a second object of the present invention to provide a punching blade that does not generate lint in a sheet to be processed during punching and does not cause cracks, deformation, distortion or the like in a punching container.

[0007]

The punching container according to the present invention is a punching container obtained by punching with a punching blade in order to achieve the above-mentioned first object. A container body having an opening on one side and a flange-shaped portion continuously provided around the opening, and a peripheral portion of the flange-shaped portion is alternately formed on the front surface side and the back surface side of the flange-shaped portion. And the valleys are formed in a continuous waveform.

In the punching container of the present invention, the peripheral edge portion of the flange-shaped portion is formed in a corrugated shape in which peaks and valleys are alternately formed on the front surface side and the back surface side of the flange-shaped portion, and a straight knife Since it does not work like that, it is difficult to cut the wrapping film for packaging. If the corrugations are formed such that the peaks are valley-shaped and the valleys are peak-shaped when viewed from the front surface side or the back surface side of the peripheral edge portion of the flange-shaped portion, the wrap film becomes even more difficult to cut. Further, in any case, the corrugated peripheral portion has an effect that the container itself has an aesthetic appearance.

The punching container of the present invention is preferably made of a resin such as polypropylene, polyethylene, polyamide, polystyrene or the like. Further, the punching container of the present invention is applied to a food storage container such as a strawberry pack or a lunch box container.

The punching blade according to the present invention is a punching blade for punching a sheet to be processed in order to achieve the above-mentioned second object. It is characterized in that a cutting edge formed by alternately forming a groove and a valley is provided.

According to the punching blade of the present invention, the sheet to be processed is first cut by the crest portion of the cutting edge of the punching blade, and then is cut by the trough portion. Unlike the conventional technique, a large shearing force is applied to the sheet to be cut and the portion of the cutting line is not cut at a time, but is gradually cut by a small shearing force. Does not occur, and the punched end does not have cracks, deformation, or distortion.

More specifically, in the punching blade of the present invention, the tip end portion of the cylindrical main body is formed with an inclined surface rising from the inner side surface of the cylindrical main body toward the outer side surface thereof, and There is a peak point at the highest position and a valley point at a position lower than the peak point on the side surface, and a base point at a position lower than the valley point exists between the inner side surface and the outer side surface of the inclined surface. The line connecting the peak point and the valley point and the line connecting the peak point and the base point form a ridge line, and the line connecting the valley point and the base point forms a valley line. It is preferable to adopt such a configuration.

Objects of the present invention will become apparent from the detailed description given below. However, while the detailed description and specific examples describe the most preferred embodiments, various changes and modifications within the spirit and scope of the invention will be apparent to those skilled in the art from the detailed description, and This is described as an example.

[0014]

Next, specific examples of the punching container and punching blade according to the present invention will be described with reference to the drawings. FIG.
1 shows a strawberry pack 1 which is a punching container according to an embodiment of the present invention. This strawberry pack 1 is composed of a container body 3 having an opening 2 on the upper side and a flange-shaped portion 4 which extends horizontally around the opening 2. An enlarged side view of the peripheral edge portion 5 (punched end portion) of the flange-shaped portion 4 as seen from the horizontal direction indicated by an arrow A is shown in FIG. 1 (c). In this way, the peripheral edge portion 5 has the mountain portion 5a when viewed in the horizontal direction.
And the valley portion 5b, the peak portion 5a and the valley portion 5b are formed in a corrugated shape so as to have a valley shape and a mountain shape, respectively, when viewed in the vertical direction.

Due to such a waveform, the strawberry pack 1 of this embodiment has an aesthetic appearance, and the peripheral edge portion 5 does not act like a knife, so that the wrap film is not easily torn when wrapped with a wrap film.

FIG. 2 shows a punching upper shape 11 to which a punching blade 10 according to an embodiment of the present invention is applied in order to obtain the strawberry pack 1 as described above. This punching die 1
1, the wooden plywood layer 12 and another wooden plywood layer 13 are laminated (adhered) via an iron blade stopper layer 14, and a reinforcing layer 15 made of stainless steel is laminated on the wooden plywood layer 13 The rectangular cylindrical punching blade 10 according to the present embodiment is planted so that the base end portion thereof contacts the blade stopper layer 14 and the tip end portion 16 projects from the reinforcing layer 15. Further, the punching die 11 has a through hole 17 which passes through the inner region of the punching blade 10 and vertically penetrates the punching die 11.
Is provided.

At the tip portion 16 of the punching blade 10 of this embodiment,
As shown in FIGS. 3A, 3B, and 3C, the inner peripheral surface 10b to the outer peripheral surface 10 are sharpened so that the outer peripheral surface 10a side is sharpened.
The inclined surface 10c is cut to a. Further, the tip portion 16 has peak points 16a and valley points 16a on the outer peripheral surface 10a.
b is provided with a base point 16c in the middle of the inclined surface 10c, and the relationship between the peak point 16a, the valley point 16b, and the base point 16c is such that the position of the peak point 16a is the highest and the position of the base point 16c is the highest. The line connecting the peak 16a and the valley 16b is low, and the peak 16a and its base point 1
The lines connecting 6c and 6c are ridge lines, and the valley points 16b
It is cut into a shape such that the line connecting the base point 16c and the base point 16c becomes a valley line.

In order to perform punching using the punching upper die 11, for example, a lower die 20 as shown in FIG. 4 is prepared. The lower mold 20 is composed of an upper plate layer 21 made of metal such as iron and stainless steel and a lower plate layer 22 made of wood plywood, and the shear hole 2 penetrating the upper plate layer 21 and the lower plate layer 22.
Three. The shear hole 23 has a shape slightly larger than the outer circumference of the punching blade 10 in the upper plate layer 21 and slightly larger than the upper plate layer 21 in the lower plate layer 22.

As shown in FIG. 4, above the shearing hole 23 of the lower mold 20, as shown in FIG.
8 is placed. Further, the upper punching die 11 is arranged above the lower die 20, and the punching blade 10 is placed above the shear hole 23.

Next, the punching upper die 11 is attached to the lower die 20.
The punching blade 10, which is the cylindrical body, is lowered into the shearing hole 23 of FIG. When the punching blade 10 enters the shear hole 23,
As shown in FIG. 5, the tip 16 of the punching blade 10
Then, the sheet 18 to be processed is punched into a predetermined shape corresponding to the shape of the punching blade 10 by shearing with the corner portion 24 of the upper layer 21 of the lower mold 20, and the strawberry pack 1 is obtained.

In this punching, the force applied to the punching blade 10 may be smaller than that of the conventional punching blade having a flat blade edge, and lint is generated at the punching end portion of the sheet to be processed. There wasn't. The ridges 5a and the valleys 5b of the peripheral portion 5 of the flange-shaped portion 4 of the strawberry pack 1 correspond to the ridges 16b, the valleys 16b, and the bases 16c of the tip 16 of the punching blade 10, respectively. There is.

Since the shearing is performed favorably without producing lint, the tip (peak 16a) of the tip portion 16 of the punching blade 10 is the punching blade 1 as shown in FIG.
It is provided so as to be located on the outer peripheral surface 10a of zero.

The strawberry pack 1 according to this embodiment obtained by punching out the sheet 18 to be processed as described above is passed through the shearing hole 23 by the push-down pusher 25 provided above the punching die 11. It is pushed down.

No lint is attached to the punched end portion (peripheral portion 5) of the strawberry pack 1 that has been pushed down, and cracks, deformation,
There was no distortion.

Although the punching blade 10 of this embodiment has a square tubular body as its main body, it can have a tubular body of any shape such as a circle depending on the desired shape of the punching container.

Further, the strawberry pack 1 of this embodiment was obtained by punching the sheet 18 to be processed by shearing using the punching upper die 11, but the lower die is a cutting table made of urethane rubber, for example. The sheet to be processed may be punched and obtained by pressing the punching blade 10 of the punching die 11 on the cutting table.

The punching container of the present invention is not limited to the strawberry pack 1 but may be a resin container such as a lunch box container used in a fast food shop or the like and may be punched with the punching blade 10. Those that mainly consist of all possible sheet materials are targeted.

The punching container of the present invention is not limited to polypropylene, but may be made of any resin such as polyethylene, polyamide, polystyrene, polyethylene terephthalate, nylon.

As mentioned above, it is obvious that the present invention can be variously modified. Such modifications do not depart from the spirit and scope of the invention and all such modifications and changes that are obvious to those skilled in the art are included in the claims.

[Brief description of the drawings]

1A and 1B are views showing a punching container according to an embodiment of the present invention, in which FIG. 1A is a perspective view, FIG. 1B is an enlarged side view of a peripheral portion, and FIG. It is an enlarged plan view.

FIG. 2 is a perspective view of a punching die including a punching blade according to an embodiment of the present invention.

3A and 3B are diagrams showing a tip end portion of a punching blade according to an embodiment of the present invention, in which FIG. 3A is a side view and FIG. 3B is a plan view.
(C) is an AA sectional view of (a).

FIG. 4 is a cross-sectional view illustrating a punching operation for obtaining the punching container according to the present embodiment.

FIG. 5 is a cross-sectional view illustrating a punching operation for obtaining the punching container according to the present embodiment.

FIG. 6 is a perspective view of a punching container of a conventional example.

7 is a cross-sectional view illustrating a punching operation for obtaining the punching container of FIG.

[Explanation of symbols]

 1 Strawberry Pack (Punching Container) 2 Opening 3 Container Main Body 4 Flange-like Part 5 Outer Perimeter 5a Crest 5b Valley 10 Punching Blade 11 Punching Top 16 Tip (Blade Edge) 16a Peak 16b Valley 16c Base 17 Through hole 18 Work sheet 20 Lower mold

Claims (6)

[Claims] 1. A punching container obtained by punching with a punching blade, which comprises a container body having an opening on one side and a flange-shaped portion continuously provided around the opening,
A punching container characterized in that a peripheral portion of the flange-shaped portion is formed in a corrugated shape in which peaks and valleys are alternately continuous on the front surface side and the back surface side of the flange-shaped portion. 2. The corrugations are formed such that the peaks are valley-shaped and the valleys are peak-shaped when viewed from the front surface side or the back surface side of the peripheral edge portion of the flange-shaped portion. The punching container according to claim 1. 3. The punching container according to claim 1, which is made of a resin such as polypropylene, polyethylene, polyamide, polystyrene or the like. 4. The punching container according to claim 1, which is a food container. 5. A punching blade for punching a sheet to be processed, characterized in that a cutting edge formed by alternately forming peaks and troughs is provided at a tip end of a cylindrical main body. A punching blade. 6. The tip end portion of the tubular body is formed with an inclined surface that rises from the inner side surface of the tubular body toward the outer side surface, and the outermost surface has a peak point and its highest point. There is a valley point lower than the mountain point, there is a base point lower than the valley point between the inner surface and the outer surface of the inclined surface, a line connecting the mountain point and the valley point The striking line according to claim 5, wherein a line connecting the peak point and the base point constitutes a ridge line, and a line connecting the valley point and the base point constitutes a trough line. Extraction blade.