JP2009057068A - Paper tray and manufacturing method for paper tray - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper tray which excels in appearance by making cuts in the areas of the corners of the paper tray, thereby forming weak portions, and by generating cracks in the cuts deliberately, thereby preventing irregular cracks generated in conventional paper trays from occurring. <P>SOLUTION: The paper tray is composed of a bottom part, a side wall part, and a flange part. In the paper tray, two kinds of ruled lines of different lengths, which extend to the specific points of the side wall part from the edge of the blank, are formed in the areas of the corners of the paper tray of a blank obtained by processing a sheet of paper sheet into a specific shape. Of the two different kinds of ruled lines of different lengths, half or full cuts are made in the paper in the thickness direction so that the cuts extend from certain middle points of the long ruled lines to the boundary face between the bottom part and the side wall part. The blank is formed into the bottom part, the side wall part and the flange part by press processing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a paper tray and a method for manufacturing a paper tray.

  2. Description of the Related Art Conventionally, as a storage container for food or the like, a plastic tray or a sheet formed by pressing a paper sheet into a tray shape is used.

The paper tray as described above is manufactured by press-molding a blank made of a single paper sheet. When press-molding paper, various problems occur due to the property that the paper does not extend. Especially, by pressing, it is difficult to form a corner composed of three-dimensional curves. A plurality of ruled lines are provided to facilitate the drawing, and the corners are narrowed down so that the shape of the corner portion can be formed in a beautiful round shape.

  However, since the blank is a paper sheet and does not extend, cracking may occur in the corner portion, particularly near the boundary between the bottom portion and the side wall portion. If a film or the like is attached to the inner surface of the tray, even if cracks occur, there is no functional problem because moisture such as food does not leak, but when shipped as a product, it will be treated as a defective product, Cannot be used as

  In order to prevent such cracking, it is described in Utility Model No. 1662479 that a resin-mixed paper obtained by mixing a polyolefin-based resin with paper is used, but if such special paper is used, the moldability is reduced. It is possible to improve and prevent cracking, but there is a problem that the material cost becomes high.

  Therefore, the present invention intentionally cuts a blank in advance without using special paper in order to prevent the corner portion from cracking irregularly occurring in such a conventional paper tray. An object of the present invention is to provide a paper tray and a method for manufacturing the same that can prevent a weak place from being regularly cracked at a predetermined position and preventing an unintended place from cracking irregularly and deteriorating its appearance. And

The paper tray of the present invention is a paper tray composed of a bottom portion, a side wall portion, and a flange portion, and corresponds to a corner of the blank paper tray obtained by processing one paper sheet into a predetermined shape. A plurality of two types of ruled lines having different lengths extending from the edge of the blank to the middle of the side wall, and of the two types of ruled lines having different lengths, the bottom and the above The blank is formed into the shape of the bottom, side wall, and flange by pressing, either half-cut or full-cut in the thickness direction of the paper, extending to the boundary surface of the side wall. Features.

Moreover, it is preferable that the film or the functional paper is stuck on the inner surface.

  Furthermore, the film is preferably a multiaxially stretched film.

  And it is preferable that the said flange part is provided with a handle and the said film or the said functional paper is also formed in the same shape as the said handle.

The paper tray manufacturing method of the present invention is a paper tray manufacturing method composed of a bottom portion, a side wall portion, and a flange portion, and forms a blank by processing one paper sheet into a predetermined shape, The step of providing a plurality of two types of ruled lines having different lengths extending from the edge of the blank to the middle of the side wall at a place corresponding to the corner of the paper tray of the blank, among the two types of ruled lines having different lengths , Extending from the middle of the longer ruled line to the boundary surface between the bottom and the side wall, providing a half cut or full cut in the thickness direction of the paper, and performing a press work to And forming the shape of the bottom portion, the side wall portion and the flange portion.

In addition, the method includes a step of partially sticking a film or functional paper to the blank using an adhesive, and the press or presses the film or functional paper together with the blank into the shape of the bottom, side wall, and flange. It is preferable to form.

  And in the process of attaching a film or functional paper partially using an adhesive to the blank, the film or function partially using the adhesive in a place other than the place corresponding to the corner of the blank. It is preferable to paste paper.

  Furthermore, it is preferable to use a multiaxially stretched film as the film.

  Further, at the time of forming the blank, a portion serving as a handle is provided at a location corresponding to the flange portion, and further, a portion serving as the handle is provided on the film or the functional paper, and the press processing is performed. It is preferable to form the handle on the blank and the film or the functional paper.

  It is preferable that the cut of either the half cut or the full cut is provided from a portion of the longer ruled line longer than the shorter ruled line to a boundary between the bottom and the side wall.

The paper tray of the present invention is a paper tray composed of a bottom portion, a side wall portion, and a flange portion, and corresponds to a corner of the blank paper tray obtained by processing one paper sheet into a predetermined shape. A plurality of two types of ruled lines having different lengths extending from the edge of the blank to the middle of the side wall, and of the two types of ruled lines having different lengths, the bottom and the above The blank is formed into the shape of the bottom, the side wall, and the flange by pressing, so that either a half cut or a full cut is provided in the thickness direction of the paper, extending to the boundary surface of the side wall. Further, it is possible to cause cracks at predetermined locations in the corner portion, prevent irregular cracks, and improve the aesthetics of the paper tray.

Moreover, it becomes possible to improve the waterproofness of a tray by having a film or a functional paper affixed on the inner surface.

  Furthermore, the said film can improve the followability of the film with respect to the blank at the time of a press process by being a film by which multiaxial stretching was carried out.

  And since the handle is provided in the flange part and the film or the functional paper is formed in the same shape as the handle, the film or the functional paper can be easily separated after using the paper tray. It becomes.

The paper tray manufacturing method of the present invention is a paper tray manufacturing method composed of a bottom portion, a side wall portion, and a flange portion, and forms a blank by processing one paper sheet into a predetermined shape, The step of providing a plurality of two types of ruled lines having different lengths extending from the edge of the blank to the middle of the side wall at a place corresponding to the corner of the paper tray of the blank, among the two types of ruled lines having different lengths , Extending from the middle of the longer ruled line to the boundary surface between the bottom and the side wall, providing a half cut or full cut in the thickness direction of the paper, and performing a press work to By including the process of forming the shape of the bottom, side wall, and flange, it becomes possible to prevent irregular cracks by causing cracks to occur at predetermined locations in the corners during pressing. The aesthetics of the tray can be improved.

In addition, the method includes a step of partially sticking a film or functional paper to the blank using an adhesive, and the press or presses the film or functional paper together with the blank into shapes of a bottom portion, a side wall portion, and a flange portion. By forming it, the paper tray can be waterproofed.

  And in the process of attaching a film or functional paper partially using an adhesive to the blank, the film or function partially using the adhesive in a place other than the place corresponding to the corner of the blank. By sticking the paper, the film or the functional paper can be easily removed after using the paper tray.

  Furthermore, by using a multiaxially stretched film as the film, it is possible to prevent deformation after the film is pressed.

  Further, at the time of forming the blank, a portion serving as a handle is provided at a location corresponding to the flange portion, and further, a portion serving as the handle is provided on the film or the functional paper, and the press processing is performed. By forming the handle on the blank and the film or the functional paper, when the film or the functional paper is removed after using the paper tray, the removal of the film or the functional paper can be easily started.

  By providing either the half-cut or full-cut in the long ruled line from a part longer than the shorter ruled line to the boundary between the bottom part and the side wall part, the crack can be more accurately determined. It is possible to prevent the occurrence of cracks at unintended locations.

  The present invention will be described in detail below with reference to the drawings. 1 and 2 are plan views of a blank 6 made of a single sheet of paper, and FIG. 3 is a perspective view of the paper tray 1 of the present invention.

  As shown in FIG. 3, the paper tray 1 of the present invention includes a bottom portion 2, a side wall portion 3, and a flange portion 4, and a film 5 is attached to the inner surface of the paper tray 1.

The paper tray 1 of the present invention is manufactured by pressing a blank 6 obtained by processing one paper sheet shown in FIG. 1 into a predetermined shape.

A method for manufacturing the paper tray 1 will be described in detail. First, one paper sheet is processed into a predetermined shape, and the blank 6 is created. Although it does not specifically limit as a processing method, A punching process etc. are used. The material of the paper sheet is not particularly limited, and various types of paper such as cardboard and cardboard can be used.

A plurality of two types of ruled lines 7 and 8 having different lengths are provided at the corners of the paper tray 1 of the blank 6. As shown in FIG. 1, a part of the ruled lines 7 and 8 are radially formed, and the longer ruled line 7 and the shorter ruled line 8 are alternately provided. As a result, the corner curve is beautifully formed by pressing.

The longer ruled line 7 is provided from the edge of the blank 6 to the vicinity of the boundary between the side wall 3 and the bottom part 2, while the shorter ruled line 8 is shorter than the ruled line 7, and the flange part 4 to the middle of the side wall 3.

Next, cuts 9 as shown in FIG. 2 are provided in the longer ruled line 7. The cutting depth is either half cut or full cut with respect to the thickness direction. By sticking the film 5 on the inner surface, it is possible to prevent moisture from leaking to the outside of the tray 1 even in the case of full cutting. Selection of full cut or half cut can be appropriately selected according to the shape of the paper tray.

  The length of the notch 9 is a length extending from the middle of the longer ruled line 7 to the boundary surface between the bottom and the side wall. In particular, it is preferable that the start of the notch 9 is a portion of the longer ruled line 7 longer than the shorter ruled line 8.

By providing such a notch 9, a weak portion is intentionally provided in the corner portion of the blank 6, and is generated near the boundary of the corner portion, in particular, the bottom portion 2 of the side wall portion 3 during press working. It is possible to intentionally generate a crack that has been generated at the position of the notch 9, and to effectively prevent an unintentional irregular crack that has been generated in the past.

  When the processing of the blank 6 is completed in this way, the film 5 is attached to a predetermined position of the blank using an adhesive. At this time, the entire surface of the film 5 is not attached with an adhesive, but is partially attached with an adhesive. In particular, the adhesive is not used in the corner portion where the ruled lines 7 and 8 and the cuts 9 are provided. This is because the corner portion is drawn at the time of press processing described later, and the film 5 is fixed when the blank 6 and the film 5 are engaged with each other.

  The adhesive used for attaching the film 5 is not particularly limited in material, but an emulsion or the like is used. Further, as the film 5, it is preferable to use a multiaxially stretched film. This is because a film uniaxially stretched or the like may be deformed in one direction after the press processing when heat is applied during the press processing described later.

  After the application of the film 5 is completed, pressing is performed using male and female molds having a predetermined shape that matches the shape of the paper tray 1. At this time, the blank 6 and the film 5 are formed simultaneously.

  Due to the pressing process, the ruled lines 7 and 8 are narrowed to form a curved corner. However, since the part provided with the notch 9 is weaker than the surrounding area, the notching is performed during the pressing process. Cracks occur in the portion 9. Thereby, it is possible to prevent the occurrence of irregular cracks as in the prior art, and to intentionally cause cracks at predetermined positions. As a result, even if a crack occurs, the aesthetic appearance is not impaired and the product can be shipped.

  In this way, the blank 6 and the film 5 are simultaneously formed into the shape of the paper tray 1 composed of the bottom 2, the side wall 3, and the flange 4 by pressing. As a result, the paper tray 1 having the film 5 attached to the inner surface is completed.

  The paper tray 1 of the present invention is completed through the above-described steps. As described above, the paper tray 1 of the present invention is provided with the notches 9 as the weak portions of the blank 6 in advance, thereby intentionally and regularly generating cracks at predetermined positions, and unintentionally irregularly damaging the aesthetic appearance. It was possible to prevent cracks.

  Further, by partially sticking the film 5 with an adhesive, when the paper tray 1 of the present invention is used and reused as a paper resource, the film 5 can be easily peeled off. it can. This makes it possible to reuse the paper resource more easily as compared with the case where the paper sheet is provided with a film layer by coating or the like and waterproofed.

  And by sticking the said film 5 on an inner surface, even when the notch 9 is a full cut, it becomes possible to ensure waterproofness. Moreover, although the film 5 was affixed on the inner surface here, the said film 5 can also be abbreviate | omitted when waterproofness is not required. In that case, the manufacturing method is substantially the same as the above-described manufacturing method, and the step of attaching the film 5 is omitted.

Next, a paper tray 1 'according to another embodiment will be described. In the above-described embodiment, the film 5 is pasted on the inner surface of the paper tray 1, but the functional paper 10 is pasted on the inner surface of the tray instead of the film 5 on the paper tray 1 ′ of the present embodiment. .

  The functional paper 10 is a paper obtained by adding a new function to the conventional paper, and there are various types. However, in the present invention, since waterproofness is particularly required, the waterproof functional paper or the waterproof paper It is preferable to use what is called.

  Furthermore, as shown in FIG. 4, in this embodiment, the handle 11 is provided in the flange part 4 of the paper tray 1 'so that the functional paper 10 can be easily removed. Accordingly, the functional paper 10 is similarly processed according to the shape of the handle.

  By providing the handle 11, when the functional paper 10 is removed after the paper tray 1 ′ is used, if the functional paper 10 is rolled up from the handle 11, the functional paper 10 can be easily removed. It can be removed from the paper tray 1 '. In particular, when the handle 11 is bent, the functional paper 10 is separated and easily turned. Therefore, a fold line 12 may be provided. In the present embodiment, one handle 11 is provided. However, the number of the handles 11 is not particularly limited, and another handle may be provided on the opposite side to provide two handles.

About the manufacturing method of paper tray 1 'of this embodiment, it is substantially the same as the manufacturing method of paper tray 1 of the above-mentioned embodiment, and is different in the flange part 4 in the process of the blank 6. It is to provide a shape to be the handle 11 at a corresponding place.

Other steps such as providing the ruled lines 7, 8 or the cuts 9, and the press working step are performed in the same manner as in the above-described embodiment. The functional paper 10 is also applied in the same process as the film 5, but the shape of the functional paper 10 needs to be processed into a shape provided with a handle 11 like the blank 6.

Other steps of attaching the functional paper 10 with an adhesive, a place where the adhesive is used, and the like are performed in the same manner as in the case of using the film 5 described above.

By such a manufacturing method, the paper tray 1 ′ of the present embodiment can be manufactured. Thus, the functional paper 10 can be used in place of the film 5, and the functional paper 10 can be easily removed by the handle 11.

  In the above-described two embodiments, the description has been given using the case where there is a single storage unit. However, the present invention is not limited to this, and a plurality of storage units such as two storage units or three storage units having different sizes may be used. It is also possible to make a paper tray having a section.

It is a top view which shows the state which provided the ruled line in the blank. It is a top view which shows the state which provided the notch in the blank. It is a perspective view of the paper tray of the present invention. It is a perspective view of the paper tray of another embodiment.

Explanation of symbols

1,1 'Paper tray 2 Bottom 3 Side wall 4 Flange 5 Film 6 Blank 7 Long ruled line 8 Short ruled line 9 Cut 10 Function paper 11 Handle 12 Fold line

Claims (10)

A paper tray composed of a bottom part, a side wall part, and a flange part,
A plurality of two types of ruled lines having different lengths extending from the edge of the blank to the middle of the side wall portion are provided at a location corresponding to a corner of the paper tray of the blank obtained by processing one paper sheet into a predetermined shape. Of the two types of ruled lines having different lengths, a half-cut or full-cut is provided in the thickness direction of the paper extending from the middle of the longer ruled line to the boundary surface of the bottom part and the side wall part. A paper tray, wherein the blank is formed into a shape of a bottom portion, a side wall portion, and a flange portion by pressing. 2. The paper tray according to claim 1, wherein a film or functional paper is attached to the inner surface.   The paper tray according to claim 2, wherein the film is a multiaxially stretched film.   The paper tray according to claim 2 or 3, wherein a handle is provided in the flange portion, and the film or the functional paper is formed in the same shape as the handle. A method for producing a paper tray composed of a bottom part, a side wall part, and a flange part,
Two types of different lengths extending from the edge of the blank to the middle of the side wall at a location corresponding to the corner of the paper tray of the blank are formed by processing a sheet of paper into a predetermined shape. Providing a plurality of ruled lines,
A step of providing either half-cut or full-cut in the thickness direction of the paper extending from the middle of the longer ruled line to the boundary surface of the bottom part and the side wall part among the two types of ruled lines having different lengths ,
And the manufacturing method of the paper tray characterized by including the process of performing a press work and forming the said blank in the shape of a bottom part, a side wall part, and a flange part. A step of partially sticking a film or a functional paper to the blank using an adhesive, and forming the film or the functional paper together with the blank into a shape of a bottom portion, a side wall portion, and a flange portion by the pressing process. The method for producing a paper tray according to claim 5.   In the step of affixing the film or functional paper partially using an adhesive to the blank, the film or functional paper is partially used in a place other than the place corresponding to the corner of the blank. The paper tray manufacturing method according to claim 6, wherein the paper tray is attached.   The method for producing a paper tray according to claim 6 or 7, wherein a multiaxially stretched film is used as the film.   When forming the blank, a portion to be a handle is provided at a location corresponding to the flange portion, and further, a portion to be the handle is provided to the film or the functional paper, and the blank and The method for manufacturing a paper tray according to any one of claims 6 to 8, wherein the handle is formed on the film or the functional paper.   10. The method according to claim 5, wherein one of the half cut and the full cut is provided from a portion of the longer ruled line longer than the shorter ruled line to a boundary between the bottom and the side wall. The manufacturing method of the paper tray of any one of these.

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