JP7270927B2 - Assembled cardboard coffin - Google Patents

Description

TECHNICAL FIELD The present invention relates to an assembled corrugated cardboard coffin, and more particularly to a corrugated cardboard coffin assembled into a box-like unfolding sheet made of reinforced corrugated cardboard.

Conventionally, as a prefabricated corrugated cardboard coffin, it is known that a spread sheet made of a reinforced corrugated cardboard is formed with a V-groove, and the spread sheet is folded along the V-groove to be assembled into a box shape.
For example, a corrugated cardboard coffin 1 as shown in FIG. Front and rear of the side plates 3, 3 are connected with folding margin plates 5, 5 which are bent by V grooves. The end plate 4 has an outer plate portion 4a and an inner plate portion 4b which are separated by two parallel V-grooves v0. These plates are provided on a single spread sheet separated by V-grooves.

When assembling the spread sheet, first, the side plates 3, 3 on the left and right sides of the bottom plate 2 are erected almost vertically. Next, the folding margin plates 5, 5 of the side plates 3, 3 are bent left and right inward in front and behind the bottom plate 2 (see FIG. 13(a)). From this state, the outer plate portion 4a of the end plate 4 is raised outside the folding margin plates 5, 5, and the inner plate portion 4b of the end plate 4 is folded back inside the coffin so as to cover the folding margin plates 5, 5 (Fig. 13 ( b) see). Thus, a box-shaped cardboard coffin 1 is assembled. In FIG. 13, reference character F denotes a reinforcing frame formed by folding back the longitudinal ends of the side plates 3 toward the inside of the coffin.
According to such a corrugated cardboard coffin 1, the expansion sheet can be folded compactly and stored before use, and when the coffin is required for a funeral, the expansion sheet can be assembled and immediately prepared.

Patent Documents 1 and 2 are well known as prior arts related to conventional prefabricated corrugated cardboard coffins.

Utility Model Registration No. 3134919 Japanese Unexamined Patent Application Publication No. 2013-132300

However, in such a conventional prefabricated cardboard coffin, as described above, when the unfolded sheet is assembled, a step occurs at the joint between the side plate 3 and the end plate 4 (see FIG. 13(B)). The cardboard end face (laminated face) appears. In other words, due to the structure of the unfolded sheet, when the end plates 4 (the outer plate portion 4a and the inner plate portion 4b) are placed over the folding margin plates 5, 5 that are bent at the front and rear of the side plate 3, the left and right ends of the end plate 4 are formed into the folding margin plates. Since it is inside the folding angle of 5,5, the cardboard end surface (laminating surface) appears on the step of this part (Fig. 13). As a result, the appearance of the coffin deteriorates and the finished product lacks a sense of luxury.

In response to this, the present inventors have developed a corrugated cardboard coffin of the type in which the end plate is inserted in order to eliminate the step at the joint between the side plate and the end plate (Patent Document 2, etc.). In this type of corrugated cardboard coffin, the end plate portion is separated from the expansion sheet, and the end plate is inserted into the joint with the side plate from above to eliminate the step.
However, such a corrugated cardboard coffin of the end plate insertion type requires time and effort to prepare the end plate separately from the expansion sheet, and the manufacturing cost increases due to the complicated structure of the joint between the side plate and the end plate.

As shown in Fig. 13, a cardboard coffin assembled with a single unfolded sheet (one sheet) is advantageous in terms of manufacturing costs. , it is important to solve the problem of appearance due to the steps as described above.

The present invention has been made in view of such a situation, and can be easily assembled with a single unfolding sheet, and can be finished with a good appearance by eliminating the step at the joint between the side plate and the end plate. It is an object of the present invention to provide an assembly type corrugated cardboard coffin that can be

[First Invention]
The prefabricated corrugated cardboard coffin of the present invention for solving the above problems is
This corrugated cardboard coffin is assembled into a box shape by forming a V-groove on a development sheet made of a reinforced corrugated cardboard material and folding the development sheet along the V-groove.
The development sheet (P) is
a rectangular bottom plate (12);
side plates (13) connected to the left and right sides of the bottom plate via V-grooves;
a folding margin plate (15) connected to the front and rear of the bottom plate via a V-groove;
and a end plate (14) connected to the front and rear of the side plate via a V-groove,
In addition, the end plate has an outer plate portion (14a) and an inner plate portion (14b) partitioned by two parallel V-grooves (v1, v1) continuous in the longitudinal direction of the side plate,
When the unfolded sheet is assembled, the side plates are raised substantially vertically on the left and right sides of the bottom plate, and the folding margin plates are raised substantially vertically on the front and rear sides of the bottom plate. The outer plate portion of the end plate is bent inward to overlap the outer side of the folding margin plate, and the inner plate portion of the end plate is positioned inside the coffin by the two parallel V-grooves at the upper end of the outer plate portion. It is configured such that it is folded back downward and overlaps the inner side of the folding margin plate.

According to the configuration of the first invention, since the side plate and the end plate are directly connected via the V-groove, the fold angle formed by bending the two serves as the joint as it is. As a result, the difference in level at the joint between the side plate and the end plate is eliminated, and the finish of the coffin can be improved. In addition, since the side plate and the end plate are connected by the skin layer (liner) of the reinforced corrugated cardboard, sufficient strength can be secured at the joint between them.

Conventionally, when assembling a corrugated cardboard coffin by folding a single unfolded sheet with a V-groove, a configuration has been adopted in which side plates and folding margin plates are connected to the left and right of the bottom plate, and end plates are connected to the front and rear of the bottom plate (Fig. 13). In particular, in the case of a corrugated cardboard coffin provided with the reinforcing frame F as described above, the joints of the reinforcing frame F can be formed by V-grooving, which is advantageous.
In the present invention, the conventional idea is changed, and side plates and end plates are connected to the left and right of the bottom plate, and folding margin plates are connected to the front and rear of the bottom plate. As a result, as described above, the difference in level at the joint between the side plate and the end plate can be eliminated, and the appearance of the cardboard coffin can be improved.
In the unfolded sheet, when the side plates and end plates are connected to the left and right of the bottom plate, and the folding margin plates are connected to the front and back of the bottom plate, if the fold line of the folding margin plate is on the same line as the fold line of the side plate and end plate, When these plates are bent into a box shape, the plates interfere with each other. In the present invention, the above-described interference can be avoided by setting the position of the fold line of the folding margin plate to the inner side of the coffin relative to the fold line of the side plate and the end plate.

[Second Invention]
A prefabricated corrugated cardboard coffin according to the second invention is a corrugated cardboard coffin assembled into a box shape by forming a V-groove on a spread sheet made of a reinforced corrugated cardboard material and folding the spread sheet along the V-groove.
The development sheet (P) is
a rectangular bottom plate (12);
side plates (13) connected to the left and right sides of the bottom plate via V-grooves;
a folding margin plate (15) connected to the front and rear of the bottom plate via a V-groove;
and a end plate (14) connected to the front and rear of the side plate via a V-groove,
In addition, the end plate has an outer plate portion (14a) and an inner plate portion (14b) partitioned by two parallel V-grooves (v1, v1) continuous in the longitudinal direction of the side plate,
When the unfolded sheet is assembled, the side plates are raised substantially vertically on the left and right sides of the bottom plate, and the folding margin plates are raised substantially vertically on the front and rear sides of the bottom plate. The outer plate portion of the end plate is bent inward to overlap the outer side of the folding margin plate, and the inner plate portion of the end plate is positioned inside the coffin by the two parallel V-grooves at the upper end of the outer plate portion. It is configured such that it is folded back downward and overlaps the inner side of the outer plate portion of the end plate above the folding margin plate.

The second invention is obtained by changing the folding method of the end plates (outer plate portion and inner plate portion) in the first invention. In the configuration of the first invention, the end plate (the outer plate portion and the inner plate portion) is folded back so as to cover the folding margin plate, whereas in the configuration of the second invention, the inner plate portion of the end plate is folded back above the folding margin plate. As a result, these plates become flush with each other and overlap the inside of the outer plate portion.

The configuration of the second invention can also provide the same effects as the first invention. That is, since the side plate and the end plate are directly connected via the V-groove, the fold angle formed by bending the two serves as the joint. As a result, the difference in level at the joint between the side plate and the end plate is eliminated, and the finish of the coffin can be improved. In addition, since the side plate and the end plate are connected by the skin layer (liner) of the reinforced corrugated cardboard, sufficient strength can be secured at the joint between them.

In addition, the configuration of the second invention can reduce the thickness of the gable portion of the corrugated cardboard coffin (meaning the entire plate on the short side of the coffin) compared to the configuration of the first invention. That is, in the configuration of the first invention, the maximum thickness of the end portion of the corrugated cardboard coffin is the thickness of three pieces of the end plate sandwiching the folding margin plate between the outer plate portion and the inner plate portion of the end plate, but the structure of the second invention. In this case, the thickness is equivalent to two layers of the end plate and the folding margin plate. Such a configuration is advantageous when adopting a reinforced corrugated board material having a large thickness.

[Third Invention]
The prefabricated cardboard coffin of the third invention has the configuration of the first invention or the second invention,
The side plate is provided with a reinforcing frame (F) formed by folding back the longitudinal end of the side plate to the inside of the coffin with a V-groove. When the inner plate portion is folded downward inside the coffin, both ends of the reinforcing frame are integrally connected to both ends of the folded portion in the orthogonal direction.

According to such a configuration, since the reinforcing frame is provided in the longitudinal direction of the side plate, the strength of the corrugated cardboard coffin can be greatly improved. Furthermore, by integrally linking the folded portions of the end plates (the outer plate portion and the inner plate portion) with the reinforcing frames of the side plates, the appearance quality of the corrugated cardboard coffin is improved, and a high-class finish can be achieved.

[First to third inventions]
In the first to third inventions, the use (for humans, pets, etc.) and the type (sleep coffin, sitting coffin, etc.) of the cardboard coffin are not particularly limited.
For the corrugated cardboard coffins of the first to third inventions, it is desirable to appropriately use fixing means in order to maintain the shape after assembling the unfolded sheets into a box shape. As fixing means, a dowel, a screw for corrugated cardboard, a double-sided tape, or the like can be used. Of course, each plate of the development sheet may be attached and fixed with an adhesive.
The cardboard coffins of the first to third inventions are mainly made of reinforced cardboard material, but may be reinforced with wood or the like as necessary.
The first to third inventions may be combined with other inventions described in this specification as required.

1 is a perspective view showing a prefabricated corrugated cardboard coffin according to a first embodiment; FIG. It is a cross-sectional view along the line [2]-[2] of FIG. 1, showing the same corrugated cardboard coffin. It is a partial perspective view showing how the unfolding sheets of the corrugated cardboard coffin are assembled, and is a partial perspective view before raising the folding margin plate. It is a partial perspective view showing how the unfolding sheets of the corrugated cardboard coffin are assembled, and is a partial perspective view after the folding margin plate is raised. It is a partial cross-sectional view showing a state before and after the end plate is folded back, showing how the development sheets of the corrugated cardboard coffin are assembled. (A) is a partial plan view and (B) is a cross-sectional view for explaining fixing means of the corrugated cardboard coffin. It is a top view which shows the expansion|deployment sheet|seat of the corrugated cardboard coffin. It is the elements on larger scale of the same deployment sheet. FIG. 11 is a perspective view showing a prefabricated corrugated cardboard coffin according to a second embodiment; It is a cross-sectional view along the line [10]-[10] of FIG. 9, showing the same cardboard coffin. It is a partial cross-sectional view showing a state before and after folding back the end plate, showing a state of assembling the expansion sheet of the corrugated cardboard coffin. (A) is a partial plan view and (B) is a cross-sectional view for explaining fixing means of the corrugated cardboard coffin. It shows a state of assembling the expansion sheet of the prefabricated corrugated cardboard coffin according to the conventional form, (A) is a partial perspective view before the end plate is raised, and (B) is a partial perspective view after the end plate is raised.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the embodiments and modifications thereof described below are examples of the mode to which the present invention is applied, and the scope of the invention is not limited to these embodiments.

[First embodiment]
As shown in FIG. 1, the cardboard coffin 10 consists of a coffin body 10A and a lid 10B. A lid 10B is provided above the coffin main body 10A, and a double door type window 11 is provided at a side position of the lid 10B. By opening the door of this window 11, the inside of the coffin can be seen.
The dimensions of the cardboard coffin 10 are, for example, about 170 to 200 cm in front and rear coffin length (long side), about 50 to 70 cm in left and right coffin width (short side), and about 40 to 50 cm in height.

The coffin body 10A and lid 10B are made of reinforced cardboard. The coffin main body 10A is assembled by forming a V-groove on a single expanded sheet made of reinforced corrugated cardboard and folding the expanded sheet into a box shape along the V-groove.

As the reinforced corrugated board material, for example, a two-layer reinforced corrugated board material (manufactured by Tri-Wall Co., Ltd., for example) having a plate thickness of about 10 to 15 mm is adopted. As shown in the enlarged view of the R portion of FIG. 2, this corrugated board material has two layers of corrugated plates r1 and r2 laminated between two thick plates (liners) Rb and Rf via a partition plate q1. It has excellent pressure resistance and water resistance.

When forming the V-shaped grooves for folding in the reinforced corrugated board, one of these layers, the thick plates Rf and Rb, is left and the other layers are cut using a rotary blade or the like. When folding the reinforced corrugated board, only the remaining thick plate (liner) is folded so that the groove surfaces of the V-grooves are brought into close contact with each other. If the V-groove is processed so that the groove angle of the V-groove is approximately 90°, the adjacent plate members are bent substantially perpendicularly.
By folding the reinforced corrugated board along the V-groove in this way, the bent portion of the thick plate (liner) acts as a hinge, and the gap between the bent plates is hidden on the opposite side of the V-groove. As a result, the dimensional accuracy of the corners of the coffin body 10A is improved, and the finished appearance can be improved. As a means for V-groove processing, a press or the like may be used to compress the reinforcing corrugated board into a V-shaped cross section.

A decorative sheet such as cloth or film is attached to the surface of the corrugated cardboard coffin 10 as required. The texture of the corrugated cardboard coffin 10 can be enhanced by applying such a decorative finish. It is also possible to use a reinforced cardboard material on which a decorative pattern such as wood grain is printed in advance.

As shown in FIG. 1, the coffin main body 10A has side plates 13, 13 on the left and right sides of a rectangular bottom plate 12, and end plates 14, 14 on the front and rear sides of the bottom plate 12. As shown in FIG. The upper ends of the side plates 13, 13 are provided with reinforcing frames F formed by bending the longitudinal ends thereof, and the reinforcing frames F increase the strength of the coffin body 10A.

FIG. 7 shows a development sheet P for assembling the coffin body 10A.
As shown in FIG. 7, the spread sheet P is produced by cutting a base plate of reinforced corrugated board into symmetrical shapes in the front and rear (up and down in FIG. 7) and left and right, and applying V-groove processing to the surface. By using an NC router or the like to process the original plate, the cutting process of the spread sheet P and the V-groove process can be automatically performed.

In FIG. 7, symbol v1 is a V-groove extending in the longitudinal direction of the coffin (vertical direction in FIG. 7), and symbol v2 is a V-groove extending in the lateral direction of the coffin (horizontal direction in FIG. 7). The cross section of these V-grooves has a groove angle of approximately 90°, and when adjacent plates are bent at the V-grooves, these plates are bent at substantially right angles. V-grooves v1 (10 in total) extending in the longitudinal direction are penetrated on the same straight line. As a result, processing of the V-groove of the spread sheet P is facilitated.
Reference numeral H denotes dowel holes, and dowels D are driven into these dowel holes H after the spread sheet P is assembled into a box shape as described later.

Each plate of the spread sheet P is connected through a V-groove around the central bottom plate 12 . Side plates 13, 13 are connected to the left and right of the bottom plate 12, and folding margin plates 15 are connected to the front and rear of the side plates 13, 13 (top and bottom in FIG. 7).

End plates 14, 14 are connected to the front and rear of the side plates 13, 13 (upper and lower in FIG. 7). The end plates 14, 14 are divided into an outer plate portion 14a and an inner plate portion 14b by two parallel V-grooves v1, v1 that extend in the longitudinal direction of the side plate 13. The end plates 14, 14 are separated by these V-grooves. When folded, the outer plate portion 14a and the inner plate portion 14b are folded back by 180 degrees.
A bending allowance 14c having the same width as the thickness of the reinforcing corrugated board is provided between the two V-grooves v1, v1 that partition the outer plate portion 14a and the inner plate portion 14b. Thereby, as will be described later, the folding margin plate 15 can be sandwiched between the outer plate portion 14a and the inner plate portion 14b.

An outer frame plate 13a and an inner frame plate 13b for forming a reinforcing frame F are connected to the left and right outer sides of the side plates 13,13. The outer frame plate 13a is separated from the side plate 13 by two V-grooves having a bending allowance 13c, and the inner frame plate 13b is separated from the outer frame plate 13a by two adjacent V-grooves v1, v1 having no bending allowance. partitioned.
When the outer frame plate 13a and the inner frame plate 13b are folded 180 degrees along the V-grooves v1, v1, both plates face each other and overlap each other. Further, when the overlapping outer frame plate 13a and inner frame plate 13b are folded 180 degrees toward the side plates 13, 13 along the V-grooves v1, v1, these plates are overlapped in three, and the ends of the side plates 13, 13 A reinforcing frame F is formed in the part (see FIG. 6(B)).

Next, a method for assembling the spread sheet P will be described.
When assembling the coffin body 10A from the unfolding sheet P, first, the reinforcing frames F are formed at the ends of the side plates 13,13. As described above, the reinforcing frame F is formed by folding back the outer frame plate 13a and the inner frame plate 13b along the V grooves.
Next, as shown in FIG. 3, the side plates 13, 13 are erected substantially perpendicularly to the left and right sides of the side plates 13, 13, and the end plates 14, 14 are faced left and right at the front and back of the side plates 13, 13. As shown in FIG. Subsequently, as shown in FIG. 4, the folding margin plate 15 is raised substantially vertically at the front and back of the side plates 13, 13 and inserted between the left and right side plates 13, 13. As shown in FIG.

From this state, the left and right end plates 14, 14 are bent inward, and the outer plate portions 14a, 14a of the end plates 14, 14 are overlapped on the outside of the folding margin plate 15. - 特許庁At this time, since the ends of the left and right end plates 14, 14 are joined without a gap at the left and right intermediate positions of the folding margin plate 15, the folding margin plate 15 is hidden inside the coffin.

Furthermore, as shown in FIG. 5(A), when the inner plate portion 14b of the end plate 14 is folded downward 180 degrees toward the inside of the coffin at the upper end of the outer plate portion 14a, the inner plate portion of the end plate 14 is placed inside the folding margin plate 15. 14b are overlapped, and the folding margin plate 15 is covered with the end plate 14 (see FIG. 5(B)). Then, the upper end of the bending allowance 14c matches the height of the reinforcing frame F. As shown in FIG.

Here, as shown in FIG. 8, the folding line of the folding margin plate 15 (folded line of the V groove v2) in the unfolded sheet P is positioned further along the unfolded sheet P than the folded line of the side plate 13 and the end plate 14 (folded line of the V groove v2). It is located at a position shifted inside the coffin (lower side in Fig. 8) by the thickness of the plate. Thus, even if the folding margin plate 15 and the end plates 14, 14 are folded in front and behind the bottom plate 12, the creases of both do not interfere with each other, and the outer plate portion 14a of the end plate 14 overlaps the outer side of the folding margin plate 15.例文帳に追加

In addition, in the vicinity of the four corners of the spread sheet P, between the developed portions of the reinforcement frame F of the side plate 13 (outer frame plate 13a, inner frame plate 13b) and the developed portion of the end plate (inner plate portion 14b), A cut K cut at an acute angle is provided. As shown in FIG. 4, with the side plates 13, 13 formed with the reinforcing frame F erected on the left and right sides of the bottom plate 12, the inner plate portion 14b and the bending allowance 14c are placed horizontally (almost) with respect to the left and right outer plate portions 14a. 90°), the cut surface of these cuts K coincides with the V-groove surface between the side plate 13 and the end plate 14 . Therefore, when the end plate 14 is placed on the folding margin plate 15 to assemble the expanded sheet P into a box shape as described above, both ends of the folded portion of the end plate 14 (the outer plate portion 14a and the inner plate portion 14b) and the side plates 13, Both ends of the reinforcing frame F of 13 are integrally connected in the orthogonal direction (see FIG. 6(A)).

After the unfolding sheet P is assembled into a box shape in this way, dowels D are driven into the dowel holes H provided in various places of the unfolding sheet P to fix the box-shaped coffin main body 10A. Since all the dowel holes H are arranged inside the coffin body 10A, the dowels D do not appear in the appearance of the coffin body 10A. As a result, as shown in FIG. 1, the coffin main body 10A having an external appearance in which the side plates 13, 13 and the end plates 14, 14 are integrally connected is completed.

In this embodiment, as shown in FIG. 6(B), dowel holes H are provided at a total of 12 locations, 3 vertically and 4 horizontally, to fix the end plate 14 and the folding margin plate 15 together. is provided. Further, as shown in FIG. 7, six dowel holes H are provided in the longitudinal direction of the coffin for fixing the reinforcing frames F (the outer frame plate 13a and the inner frame plate 13b) of the side plates 13,13. The positions of these dowel holes H may be appropriately changed according to the size of the coffin and the thickness of the reinforced cardboard material.

As described above, according to the corrugated cardboard coffin 10 of the first embodiment, the side plate 13 and the end plate 14 are directly connected via the V-groove, so that the fold angle formed by bending the two serves as a seam. . As a result, the step at the joint between the side plate 13 and the end plate 14 is eliminated, and the finish of the coffin can be improved.
In addition, since the side plate 13 and the end plate 14 are connected by the surface layer (liner) of the reinforced corrugated cardboard, sufficient strength can be ensured at the joint between them.
Further, in the corrugated cardboard coffin 10, since the reinforcing frame F is provided in the longitudinal direction of the side plate 13, the strength of the coffin such as load resistance can be greatly improved. Furthermore, by integrally linking the folded portion of the end plate 14 (the outer plate portion 14a and the inner plate portion 14b) and the reinforcing frame F of the side plates 13, 13, the quality of the appearance of the coffin is improved, and the appearance of the coffin is enhanced. It can be finished.

[Second embodiment]
Next, FIGS. 9 to 12 show an assembled cardboard coffin according to the second embodiment. The second embodiment employs a three-layer type reinforced corrugated board material instead of the two-layer type reinforced corrugated board material (first embodiment).

As shown in FIG. 9, the cardboard coffin 20 includes a box-shaped coffin body 10A and a lid 10B that covers the coffin body 10A, as in the first embodiment. The coffin main body 10A has side plates 13, 13 on the left and right sides of a rectangular bottom plate 12, and end plates 14, 14 on the front and rear sides of the bottom plate 12. As shown in FIG.

As shown in FIG. 10, the coffin body 10A and the lid 10B are made of three-layer reinforced cardboard material. The coffin main body 10A is assembled by forming a V-groove on a single expanded sheet made of reinforced corrugated cardboard and folding the expanded sheet into a box shape along the V-groove.

As the reinforced corrugated board material, for example, a three-layer reinforced corrugated board material (manufactured by Tri-Wall Co., Ltd., for example) having a plate thickness of about 15 to 20 mm is adopted. As shown in the enlarged view of R in FIG. 10, this reinforced corrugated board consists of two thick plates (liners) Rb and Rf and three layers of corrugated plates r1 to r3 interposed between partition plates q1 and q2. It has excellent pressure resistance and water resistance.

A development sheet for assembling the coffin body 10A of the second embodiment basically has the same configuration as the development sheet P shown in FIG. 7, side plates 13, 13 are connected to the left and right of the bottom plate 12, and folding margin plates 15 are connected to the front and rear of the side plates 13, 13. As shown in FIG. End plates 14 , 14 are connected to the front and rear of the side plates 13 , 13 . V-grooves v1 and v2 for bending are formed at the boundaries of each plate.

In the second embodiment, the end plates 14, 14 are divided into an outer plate portion 14a and an inner plate portion 14b by two parallel V-grooves v1, v1 without a bending margin 14c. Thus, when the outer plate portion 14a and the inner plate portion 14b are folded back at these V-grooves, the two plates overlap each other without a gap.
In addition, in the spread sheet of the second embodiment, the inner frame plate 13b of the side plates 13, 13 and the two V-grooves v1, v1 for folding this are omitted. The two V grooves v1, v1 between the side plates 13, 13 and the outer frame plate 13a are two parallel V grooves without the bending allowance 13c, like the V grooves of the end plates 14, 14 described above. When the side plates 13, 13 and the outer frame plate 13a are folded back at these V-grooves, the two plates overlap each other without a gap.

When assembling the coffin body using the spread sheets of the second embodiment, reinforcing frames F are first formed at the ends of the side plates 13, 13, as in the first embodiment. The reinforcing frame F is formed by folding back the outer frame plate 13a along the V-groove 180° at the ends of the side plates 13, 13 which are connected in the longitudinal direction.
Next, the side plates 13, 13 are erected substantially perpendicularly to the left and right sides of the bottom plate 12, and the end plates 14, 14 are faced to the left and right at the front and back of the side plates 13, 13.例文帳に追加Subsequently, the folding margin plate 15 is raised almost vertically in front of and behind the side plates 13, 13 and inserted between the left and right side plates 13, 13. - 特許庁

From this state, the left and right end plates 14, 14 are bent inward, and the outer plate portions 14a of the end plates 14, 14 are overlapped on the outside of the folding margin plate 15.例文帳に追加At this time, the ends of the left and right end plates 14, 14 are joined without a gap at the left and right intermediate positions of the folding margin plate 15, so that the folding margin plate 15 is hidden inside the coffin.

Furthermore, as shown in FIG. 11(A), when the inner plate portion 14b is folded 180 degrees downward toward the inside of the coffin at the upper end of the outer plate portion 14a, the outer plate portion 14a and the inner plate portion are folded above the folding margin plate 15. 14b are flush with each other (see FIG. 11(B)). Then, the upper end of the bending allowance 14c matches the height of the reinforcing frame F. As shown in FIG.

At this time, as in the first embodiment, the creases between the side plates 13, 13 and the folding margin plate 15 are shifted toward the inside of the coffin by the thickness of the creases between the side plates 13, 13 and the end plates 14, 14. Therefore, even if the folding margin plate 15 and the end plates 14, 14 are folded before and after the side plates 13, 13, the creases of both do not interfere with each other, and the outer plate portions of the end plates 14, 14 are placed outside the folding margin plate 15. 14a overlap.

Further, similarly to the first embodiment, in the vicinity of the four corners of the spread sheet, the deployed portions of the reinforcing frame F of the side plate 13 (outer frame plate 13a, inner frame plate 13b) and the deployed portion of the end plate (inner plate portion 14b) are arranged. Since a cut K (see FIG. 7) cut at an acute angle when viewed from the plane direction is provided between both ends of the folded portion of the end plate 14 (the outer plate portion 14a and the inner plate portion 14b) and the side plates 13, 13 Both ends of the reinforcing frame F are integrally connected in the orthogonal direction (see FIG. 12(A)).

After assembling the spread sheet into a box shape in this way, the shape of the coffin main body 10A is fixed by driving dowels D into the dowel holes H provided in various places of the spread sheet. As a result, as shown in FIG. 9, the coffin main body 10A having an external appearance in which the side plates 13, 13 and the end plates 14, 14 are integrally connected is completed.

Also in the corrugated cardboard coffin 20 of the second embodiment, the side plates 13, 13 and the end plates 14, 14 are directly connected via the V-groove, so the fold angle formed by bending the two serves as a joint. . As a result, the steps at the joints between the side plates 13, 13 and the end plates 14, 14 are eliminated, and the finish of the coffin can be improved.
In addition, since the side plates 13, 13 and the end plates 14, 14 are connected by the surface layer (liner) of the reinforced corrugated cardboard, sufficient strength can be ensured at the joints.
Furthermore, since the corrugated cardboard coffin is provided with reinforcing frames in the longitudinal direction of the side plates 13, 13, the strength of the corrugated cardboard coffin can be significantly improved. Furthermore, by integrally connecting the folded portions of the end plates 14, 14 (the outer plate portion 14a and the inner plate portion 14b) to the reinforcing frame of the side plates 13, 13, the quality of the appearance of the corrugated cardboard coffin is improved, giving it a high-class appearance. It can be finished.

In addition, the corrugated cardboard coffin 20 of the second embodiment can suppress the thickness of the gable part of the corrugated cardboard coffin compared to the first embodiment. That is, in the first embodiment, the maximum thickness of the end portion of the corrugated cardboard coffin 10 is the thickness of three sheets of the end plate 14 sandwiching the folding margin plate 15 between the outer plate portion 14a and the inner plate portion 14b. In the second embodiment, the thickness is equivalent to two sheets of the end plate 14 and the folding margin plate 15 stacked on each other. For this reason, it is possible to secure the sufficient strength of the corrugated cardboard coffin 20 and to make the shape of the development sheet simpler.

[Modification]
Although the prefabricated corrugated cardboard coffins according to the embodiments have been described above, the embodiments of the present invention are not limited to these configurations and may involve various modifications and changes.
In the above-described embodiment, a planar lid is used, but a three-dimensional lid may be used.

In the above embodiment, the dowels D are used as fixing means for maintaining the shape of the coffin body 10A assembled from the spread sheet, but instead of this, a reinforced corrugated cardboard joint screw or stapler may be used. Since this type of fixing means can be driven directly into the reinforced cardboard material with an electric screwdriver or a tacker, there is no need to make pilot holes such as the dowel holes H in the spread sheet. In addition, since the fixing position of the reinforcing corrugated cardboard can be freely set, the work of assembling the spread sheet can be simplified. In addition, it is of course possible to adopt a double-sided tape, an adhesive, or the like as a fixing means.

In the above embodiment, the fixing means (dowels) are hidden inside the coffin, but the fixing means may be visible outside. In the case of adopting special fixing means as described above, it is possible to give a decorative effect by intentionally making the fixing means look like a coffin.

The cardboard coffin of the above embodiment may be reinforced with wood or the like. For example, if plywood or laminated wood is layered and attached to the bottom plate 12, the strength of the coffin can be increased and the load resistance can be improved.

10 Cardboard coffin (assembled cardboard coffin)
10A coffin body 10B lid 11 window 12 bottom plate 13 side plate 13 13a outer frame plate 13b inner frame plate 13c bending allowance 14 end plate 14a outer plate portion 14b Inner plate portion 14c Bending margin 15 Folding plate D Dowel H Dowel hole P Deployment sheet v1, v2 V groove

Claims (3)

This corrugated cardboard coffin is assembled into a box shape by forming a V-groove on a development sheet made of a reinforced corrugated cardboard material and folding the development sheet along the V-groove.
The development sheet (P) is
a rectangular bottom plate (12);
side plates (13) connected to the left and right sides of the bottom plate via V-grooves;
a folding margin plate (15) connected to the front and rear of the bottom plate via a V-groove;
a end plate (14) connected to the front and rear of the side plate via a V-groove,
In addition, the end plate has an outer plate portion (14a) and an inner plate portion (14b) partitioned by two parallel V-grooves (v1, v1) continuous in the longitudinal direction of the side plate,
When the unfolded sheet is assembled, the side plates are raised substantially vertically on the left and right sides of the bottom plate, and the folding margin plates are raised substantially vertically on the front and rear sides of the bottom plate. The outer plate portion of the end plate is bent inward to overlap the outer side of the folding margin plate, and the inner plate portion of the end plate is positioned inside the coffin by the two parallel V-grooves at the upper end of the outer plate portion. A prefabricated corrugated cardboard coffin characterized in that it is folded downward and overlapped inside the folding margin plate. This corrugated cardboard coffin is assembled into a box shape by forming a V-groove on a development sheet made of a reinforced corrugated cardboard material and folding the development sheet along the V-groove.
The development sheet (P) is
a rectangular bottom plate (12);
side plates (13) connected to the left and right sides of the bottom plate via V-grooves;
a folding margin plate (15) connected to the front and rear of the bottom plate via a V-groove;
and a end plate (14) connected to the front and rear of the side plate via a V-groove,
In addition, the end plate has an outer plate portion (14a) and an inner plate portion (14b) partitioned by two parallel V-grooves (v1, v1) continuous in the longitudinal direction of the side plate,
When the unfolded sheet is assembled, the side plates are raised substantially vertically on the left and right sides of the bottom plate, and the folding margin plates are raised substantially vertically on the front and rear sides of the bottom plate. The outer plate portion of the end plate is bent inward to overlap the outer side of the folding margin plate, and the inner plate portion of the end plate is positioned inside the coffin by the two parallel V-grooves at the upper end of the outer plate portion. A prefabricated corrugated cardboard coffin, characterized in that it is folded downward and overlapped with the inner side of the outer plate portion of the end plate above the folding margin plate. 3. The corrugated cardboard coffin according to claim 1 or 2, wherein the side plate is provided with a reinforcing frame (F) formed by folding back the longitudinal ends of the side plate toward the inside of the coffin with a V-groove. At the time of assembly, when the inner plate portion is folded downward inside the coffin at the upper end of the outer plate portion of the end plate, both ends of the reinforcing frame are integrally connected to both ends of the folded portion in the orthogonal direction. , Assembled cardboard coffin.

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