JPH07251869A - Reinforcement structure for tubular support, and corrugated board packing employing such structure - Google Patents

Abstract

PURPOSE:To make strength serviceable when packing cvases are piled up in tiers while providing availability that works for absorbing shocks when the packing cases are dropped, and to make the packing case combustible by using a material that is easily disposable and unharmful to environment. CONSTITUTION:While reinforcing pieces 14, 16 are provided to the end on an opening of a tubular body functioning as a tubular support, inserting pieces 15 and 15, each formed of a pair of closing pieces 15a, 15a for closing the opening and a pair of opposite inserting pieces 15b, 15b connecting to the closing pieces and for folding the closing pieces 15a, 15a into the opening, are provided. Thereby, the end on the opening of the tubular body can be reinforced while reinforcement from the inside to the outside of the opening can be made by the opposite inserting pieces 15b, 15b when the opening is closed with the closing pieces 15a, 15a with the opposite inserting pieces 15b, 15b inserted into the opening of the tubular body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure of a cylindrical support used when an electric product or the like is stored in a packaging box, and a corrugated board packing using the same.

[0002]

2. Description of the Related Art Conventionally, a cushioning material (hereinafter referred to as packing) such as styrofoam or synthetic resin has been used to store electric products such as a television receiver and a video tape recorder (VTR) in a packaging box. It was As shown in FIG. 15, upper packings 2 and 3 and lower packings 4 and 5 having recesses formed on the upper and lower ridges and corners of the television receiver 1 as a product so as to be fitted onto these are arranged. Then, as shown in FIG. 16, the receiver 1 is protected by absorbing the impact during transportation by storing it in the packaging box 6.

[0003] However, such conventional packing is often formed of styrofoam and generates toxic gas when burned, so that there is a problem that it must be handled as a twisted product at the time of disposal.

[0004]

As described above, since the conventional packing is made of expanded polystyrene,
There was a problem that it could not be burned and the disposal process was troublesome.

In view of the above problems, the present invention uses a material that is easy to dispose of and is non-polluting, can be burned, and has a high strength when the packaging boxes are stacked and a high strength against a drop impact. An object of the present invention is to provide a reinforcing structure for a cylindrical column and a cardboard packing using the same.

[0006]

According to a first aspect of the present invention, there is provided a reinforcing structure for a cylindrical column, comprising: a tubular body formed by bending a plate body into a columnar shape; and at least two surfaces constituting side surfaces of the tubular body. And a closing piece that extends at both ends on the opening side and closes the opening-side end by bending to the inner surface of the cylinder, and a V-shaped insert that is bendably extended to the outer periphery of the central portion of the closing piece. And an insert piece for closing the openings at both ends of the cylindrical body with the closing pieces by folding both ends of the inserting opposite piece to the opposite ends on the opening side. .

According to a second aspect of the present invention, there is provided a reinforcing structure for a cylindrical support, comprising: a tubular body formed by bending a plate body into a columnar shape; and an opening side end portion of at least one surface constituting the side surface of the tubular body. At least a pair of reinforcing pieces that extend and reinforce both ends on the opening side by bending to the inner surface of the cylinder, and openings on a plurality of surfaces that constitute the side surface of the cylinder and that face the surface on which the reinforcing piece is formed. -Side closing piece that extends to both ends of the closing side and closes the end portion on the opening side by bending to the inner surface of the cylinder, and an insertion facing piece that extends in a V-shape so as to be bendable around the outer periphery of the central portion of the closing piece. And a plug-in piece for closing the openings at both ends of the tubular body with the closing pieces by folding both ends of the insert-opposing piece into the ends on the opening side where the reinforcing piece is present. is there.

A corrugated board packing according to a third aspect of the present invention is provided with a cylindrical body formed by bending a plate body into a columnar shape, and extending at both ends on the opening side of at least two surfaces constituting the side surfaces of the cylindrical body. A closing piece that closes the end on the opening side by bending to the inner surface of the cylinder, and an insertion facing piece that extends in a V-shape so as to be bendable around the outer periphery of the central portion of the closing piece. A plurality of insertion pieces for closing the openings at both ends of the cylinder with the closing pieces by folding both ends of the piece into the opposite ends on the opening side, and a plurality of pieces over at least two surfaces forming the side surfaces of the cylinder. Is formed by making a notch, and a notch is formed on a surface other than the plurality of surfaces on which the recess forming piece is formed and the recess forming piece that forms a recess on the side surface of the cylinder by bending. Fold by putting Intended to be capable formed, it is obtained by and a support piece for supporting the recesses by the recess forming member from the interior tubular body by pushing the free end side inside the cylinder.

A corrugated board packing according to a fourth aspect of the present invention comprises a tubular body formed by bending a plate body into a columnar shape, and extending at both ends of an opening side of at least one surface constituting a side surface of the tubular body. At least a pair of reinforcing pieces that reinforce both end portions on the opening side by bending to the inner surface of the cylinder, and both end portions on the opening side in a plurality of surfaces that constitute the side surface of the cylinder and that face the surface on which the reinforcing pieces are formed. A closing piece that extends to the inside of the cylinder and closes the end portion on the opening side by bending to the inner surface of the cylinder, and an insertion facing piece that extends in a V-shape so as to be bendable around the outer periphery of the central portion of the closing piece, A side surface of the cylindrical body and an insertion piece for closing the openings at both ends of the cylinder with the closing pieces by folding both ends of the insertion facing piece into the end on the opening side where the reinforcing piece exists. Multiple cuts on at least two sides And a cutout is formed on a surface of the cylindrical body other than a plurality of surfaces on which the concave formation pieces are formed. And a supporting piece for supporting the recess formed by the recess forming piece from the inside of the cylinder by pushing the free end side into the inside of the cylinder.

According to a fifth aspect of the present invention, in a corrugated cardboard packing, a plate body is bent to form a columnar shape, and a plurality of cuts are formed in at least two surfaces constituting the side surfaces of the cylindrical body. It is formed so that it can be bent by forming a recess on the side surface of the tubular body by bending and a cutout on a surface of the tubular body other than the plurality of surfaces on which the concave formation pieces are formed. A support piece that supports the recess formed by the recess forming piece from the inside of the cylinder by pushing the free end side into the inside of the cylinder, and both ends on the opening side of at least one surface forming the side surface of the cylinder. And a base piece that reinforces both ends on the opening side by bending to the inner surface of the cylinder, and is foldably extended to a part of the base piece,
The reinforcing piece, which comprises a side surface of the cylindrical body, and a reinforcing piece formed by a bent piece that supports the concave portion formed by the concave portion forming piece from the inside of the cylindrical body by pushing the free end side and the supporting end side into the opening of the cylindrical body. A closing piece that extends at both ends on the opening side of the plurality of surfaces facing the surface on which the piece is formed and that closes the end on the opening side by bending to the inner surface of the cylinder, and bends to the outer periphery of the central portion of the closing piece. It is composed of an insertion facing piece that extends in a V shape as much as possible, and both ends of the insertion facing piece are folded into the end portion on the opening side where the reinforcing piece is present, so that the openings at both ends of the cylinder are covered with the closing piece. And a plug-in piece for closing.

[0011]

According to the invention described in claim 1, since the closing piece for closing the opening of the cylindrical body and the insertion piece composed of the insertion facing piece for connecting the closing piece to fold the closing piece into the opening are provided. In the state in which the plug is closed by the closing piece, the insertion opposing piece reinforces the opening from the inner surface.

According to the second aspect of the present invention, a reinforcing piece is provided at the end portion on the opening side of the cylindrical body, and the closing piece for closing the opening and the insertion facing piece for connecting the closing piece to the opening and folding the closing piece into the opening. Since the insertion piece made of is provided, in addition to the reinforcement of the end portion on the opening side of the cylindrical body by the reinforcement piece, in the state where the opening is closed by the closing piece, reinforcement from the inner surface of the opening to the outer side by the insertion facing piece is performed. Is made.

According to the invention of claim 3, in addition to the invention of claim 1, there is provided a recess forming piece for forming a recess to be fitted on a ridge line and a corner of the product, and one surface of the cylindrical body. Since a supporting piece for supporting the recess from the inside of the cylinder is provided by cutting in, the recess for external fitting of the product is sufficient against drop impact etc. even if packing is made of a plate body such as corrugated board. It is possible to obtain various strengths.

According to the invention described in claim 4, in addition to the invention described in claim 2, a concave portion forming piece for forming a concave portion to be fitted on the ridge line and the corner portion of the product is provided, and one surface of the cylindrical body is provided. Since a supporting piece for supporting the recess from the inside of the cylinder is provided by cutting in, the opening end of the cylinder can be reinforced even if the packing is made of a plate such as corrugated board.
The recess for external fitting of the product can obtain sufficient strength against a drop impact or the like.

According to a fifth aspect of the present invention, in addition to the second aspect of the present invention, a concave portion forming piece for forming a concave portion to be fitted on the ridge line and the corner portion of the product is provided, and one surface of the cylindrical body is provided. While providing a support piece for supporting the recess from the inside of the cylinder by cutting into the base, a reinforcing piece arranged at the end on the opening side of the cylinder is provided with a base piece for the purpose of reinforcing the opening end and this base piece. Since the concave portion formed by the concave portion forming piece is configured to be a bent piece for supporting the inside of the cylindrical body in part, the opening end portion of the cylindrical body can be reinforced even if the packing is constituted by a plate body such as corrugated board. In addition, the recess for external fitting of the product can obtain higher strength against a drop impact or the like.

[0016]

EXAMPLES Examples will be described with reference to the drawings. 1 to 4 are perspective views showing a reinforcing structure of a cylindrical column according to an embodiment of the present invention, and FIG. 5 is a development view of a plate body before assembling the cylindrical column.

First, the construction and manufacturing method of the plate body shown in FIG. 5 will be described.

The plate body 10 shown in FIG. 5 is obtained by pressing one corrugated board. The corrugated cardboard is formed by placing a corrugated paper body 7 in the center as shown in FIG. 6 and attaching two flat paper bodies 8 and 9 so as to sandwich the corrugated paper body 7 from both sides. The direction parallel to the corrugated shape of the internal paper body 7 is called the step direction, and the direction orthogonal to this step direction is called the flow direction. In the state of FIG. 6, when a force is applied in the step direction from the upper and lower cut surfaces M1 of the corrugated board, the strength is strong, and the left and right cut surfaces M2.
When a force is applied in the flow direction, the strength is weak (easy to bend). In the plate body 10 in the development view shown in FIG. 5, the step direction is the left-right direction in the drawing.

Dotted lines 11a to 11c shown in FIG. 5 are ruled lines which are folds formed by linear pressing, 11a is a ruled line drawn in the flow direction, 11b is a ruled line drawn in the step direction,
Reference numeral 11c is a ruled line drawn in an oblique direction with respect to the step direction (or the flow direction). Reference numeral 12a is a notch that is a fold line drawn in the flow direction. The ruled lines 11a to 11c and the notch 12a are formed by pressing the outer shape and pressing at the same time as the outer shape is formed. The parts A, B, C, and D partitioned by the ruled lines 11a and 11b are bent by the four ruled lines 11a and the side end of the side surface A is joined to the joining piece 13 to form a tubular body. Four sides A, B, C,
To form D.

The connecting piece 13 is provided so as to be connected to the side surface D. Further, the reinforcing pieces 14 and 14 are provided so as to be connected to both ends of the side surface A in the flow direction, and the reinforcing pieces 16 and 16 are provided to be connected to both ends of the side surface B in the flow direction. Further, insertion pieces 15 and 15 are provided so as to be connected to both ends of the side surfaces C and D in the flow direction. This insert 1
Reference numerals 5 and 15 are two sets of triangular closing pieces 15a and 15 provided so as to be connected to both ends of the side faces C and D in the flow direction.
a and insertion facing pieces 15b and 15b formed in a V-shape and connected to each pair of closing pieces 15a and 15a. The insertion facing pieces 15b, 15b are the closing pieces 15a, 1
5a can be bent using ruled lines 11c and notches 12a.

Next, the assembly of FIG. 5 will be described in the order of FIGS.

FIG. 1 is a side view A, B, C, D in FIG.
And the connecting piece 13 are bent along the ruled lines 11a at the respective boundaries, and the connecting piece 13 is connected to the side end portion of the side surface A to form the cylindrical body 17
Shows the state. The joining piece 13 and the side end portion of the side surface A are joined together by using a staple (staple), an adhesive material or an adhesive tape.

After that, as shown in FIG. 2, two sets of reinforcing pieces 14 and 16 are folded inside the side surfaces A and B so as to enter the inside of the openings on both sides of the cylindrical body 17, and the inserting pieces 15 and 15 are further inserted.
Insertion facing piece 15 provided in the central portion of each outer periphery
b and 15b centered on the notch 12a, the mountain is folded from the state of FIG. 1, and the ruled lines 11c and 11c on both sides thereof are
The state shown in FIG. 1 is folded inward so as to be folded inwardly on the inner surfaces of the side surfaces A and B.

FIG. 3 shows a pair of reinforcing pieces 14, 16 as shown in FIG.
It shows a state in which the state is completely folded into the inner surfaces of the side faces A and B. In this state, the open end portions of the side surfaces A and B are reinforced.

In FIG. 4, the insertion facing pieces 15b, 15b are inserted into the openings at both ends of the cylindrical body 17 in the direction of the arrow from the state of FIG. 3, and the openings on both sides of the cylindrical body 17 are set as a set. Blocking piece 1
5a, 15a closed state (reinforcing structure of tubular support 18
(Completed state of) is shown. Although the left opening is closed in the figure, the right opening is also closed by a pair of closing pieces 15a, 15a. In this state, the pair of closing pieces 15a, 15a each have a step direction in the arrow direction, and the outline lines LA, LB of the pair of closing pieces 15a, 15a are the inner surfaces of the opening ends of the side surfaces A, B, respectively. It comes into contact with the (reinforced part). Therefore, for example, even when a load is applied to the side surface B or the side surface A from the outside, both ends of the cylindrical body 17 are always supported in the step direction against these loads, so that damage such as crushing is prevented. can do.

According to the embodiment shown in FIGS. 1 to 5 described above, the reinforcing pieces 14 and 16 are provided at the open ends of the cylindrical body 17 to be the support, while the pair of closing pieces 15a and 15a for closing the openings are provided. Since a pair of insertion pieces 15, 15 composed of a pair of insertion facing pieces 15b, 15b which are connected to this and fold the pair of closing pieces 15a, 15a into the opening are provided, the tubular body 17 formed by the reinforcing pieces 14, 16 is provided. In addition to the reinforcement of the opening end of the
In the state of being closed by 5a, the insertion facing pieces 15b, 15b provide reinforcement from the inner surface of the opening to the outer side.

As another embodiment of the present invention, the structure in which the reinforcing pieces 14 and 16 are removed from the embodiment of FIGS. 1 to 5 may be adopted. Even if the reinforcing pieces 14 and 16 are removed in this manner, the closing pieces 15a and 15a and the insertion facing pieces 15b and 15b are also included.
Since there is the insertion piece 15 composed of and, when the opening of the cylindrical body 17 is closed by the closing pieces 15a, 15a, the insertion facing piece 1
Reinforcement is performed from the inner surface of the opening to the outer side by 5b and 15b.

7 to 13 are perspective views showing a corrugated board packing using a reinforcing structure of a cylindrical support according to an embodiment of the present invention, and FIG. 14 is a development view of a plate body before assembling the corrugated board packing. is there.

First, the structure and manufacturing method of the plate body shown in FIG. 14 will be described.

The plate body 20 shown in FIG. 14 is obtained by pressing one corrugated board. The corrugated board is formed by sticking two flat paper bodies 8 and 9 so that a corrugated paper body 7 is sandwiched from both sides as shown in FIG. The plate body 20 of FIG. 14 is formed such that the step direction is the left-right direction of the developed view.

Dotted lines 21a to 21c shown in FIG. 14 are ruled lines which are folds formed by linear pressing, 21a is a ruled line drawn in the flow direction, 21b is a ruled line drawn in the step direction, and 21c is a step. It is a ruled line drawn in an oblique direction with respect to the direction (or the flow direction). 22a is an insertion facing piece 25
Cuts 22b are cuts that are folds drawn in the center of the b and 25b in the flow direction, cuts 22b are formed to provide the recess forming pieces 27 across the side surfaces A and B, and 22c is the side surfaces A and B.
In, the notch for bending the recess forming piece 27 into the recess, 22d is a notch for forming the support pieces 28, 28, and 22e is a notch for forming the protruding piece 29. The ruled lines 21a to 21c and the notches 22a to 22e are
The outer shape is extracted and pressed at the same time when the outer shape is formed. Part A separated by ruled lines 21a and 21b,
B, C, and D are bent along the four ruled lines 21a and side A
When the tubular body is formed by joining the side ends of the joining piece 13 and the joining piece 13, four side faces A, B, C, D of the tubular body are formed.

The coupling piece 23 is provided so as to be connected to the side surface D. The coupling piece 23 includes a base piece 23a and the base piece 23a.
It is composed of a bent piece 23b connected to a substantially central portion of a, and cutouts 23a1 and 2 are formed on both sides of the bent piece 23b.
3a1 is formed. Therefore, the protrusions 23a2, 23a2 are formed so as to be connected to both ends of the base piece 23a and protrude. The width L1 of the protruding portion 23a2 is formed to be substantially equal to or smaller than the width L2 between the notch 22b and the ruled line 21b formed in the step direction across the side surfaces A and B (L1≤L2. ). Width L4 of the base piece 23a
Is approximately equal to the width L5 between the side edge of the side surface A and the line P1-P2.

Reinforcing pieces 24, 24 are provided so as to be connected to both ends of the side surface A in the flow direction, and reinforcing pieces 26, 24 are provided so as to be connected to both ends of the side surface B in the flow direction, respectively.
26 are provided. The reinforcing piece 24 is connected to the flow direction of the side surface A, and is connected to a base piece 24a that reinforces the opening end by bending and a part of the base piece 24a.
The free end is pushed into the opening of the tubular body to form a bent piece 24b for supporting a concave portion formed by a concave portion forming piece 27 from the inside of the tubular body. Similarly, the reinforcing piece 26 is
A base piece 26a which is connected to the side surface B in the flow direction and reinforces the opening end by bending, and a recess formed by a recess forming piece 27 described below by connecting the base piece 26a to the base piece 26a and pushing the free end into the opening of the cylindrical body. And a bent piece 26b for supporting the inside of the cylindrical body.

Further, insertion pieces 25, 25 which are connected to both ends of the side faces C and D in the flow direction and which can be bent at the ruled lines 21b, 21c are provided. The insertion pieces 25, 25 are respectively connected to two sets of triangular closing pieces 25a, 25a provided so as to be connected in the flow direction of the side surfaces C and D, and the closing pieces 25a, 25a of each set. It is composed of insertion facing pieces 25b, 25b formed in a V shape. The pair of insertion facing pieces 25b, 25b is a pair of closing pieces 25.
The a and 25a can be bent by a ruled line 21c and a cut 22a. Each set of blocking pieces 25a, 25a
Has a function of closing the open end by bending. Further, the insertion facing pieces 25b, 25b are extended in a V-shape so as to be bendable at the center of the outer peripheral portion of each set of the closing pieces 25a, 25a, and at the time of assembly, the insertion facing pieces 25b, 25b.
The tip of 5b is folded into the opening end side where the reinforcing pieces 24 and 26 are provided to close the opening of the tubular body to the closing piece 25.
It is possible to block with a and 25a.

Further, near the opening ends of the side surfaces A and B,
Cuts 22b, 22b having a predetermined length L3 are formed in the step direction across the side surfaces A, B. On the side A, the end point P1 of one notch 22b to the end point P of the other notch 22b
Between 2 is a crease line 21a and a notch 22c
Is formed, and one notch 22b on the side B is formed.
A crease line 21a and a notch 22c are formed between the end point P3 and the end point P4 of the other notch 22b. The portion (A1, B1) surrounded by these end points P1, P2, P4, P3 constitutes a recess forming piece 27. The recess forming piece 27 is for forming a recess by bending the plate body 20 into a cylindrical body by the ruled line 21a and the notch 22c.

Further, the side surface C has cuts 22d and 22d.
By this formation, supporting pieces 28, 28 that are bendable (rotatable) are formed on the ruled lines 21b, 21b that are the respective support ends. The support pieces 28, 28 have their respective support ends 21b,
21b denotes both ends N1 and N of the bent piece 23b of the connecting piece 23.
2 (that is, the support ends 21b and 21b and the ends N1 and N2 of the bent piece 23b substantially correspond to each other), and their free ends (rotating ends) face each other. Is formed. The width L6 of each free end of the supporting pieces 28, 28 is made substantially equal to the width L5 between the side end of the side surface A and the line P1-P2 (L6 = L5). Support piece 2
The width L7 of the supporting ends 8 and 28 is P3−
It is made to be almost equal to the width L8 between the lines P4 (L7 = L8
). When the free ends and the supporting end sides of the supporting pieces 28, 28 are pushed into the inside of the cylindrical body at the time of assembling the cylindrical body, the concave portion already formed by the concave portion forming piece 27 becomes the supporting piece 2.
It is supported from the inside of the cylinder by the free ends of 8 and 28 and the support end side.

Further, two sets of projecting pieces 29, 2 are formed by cutting a part of the reinforcing pieces 24, 24 and the closing pieces 25a, 25a by the notch 22e on the side of the open ends of the side A and the side C.
9 is provided. In FIG. 14, the hatched portion indicates the cut portion. These two sets of projecting pieces 29, 29 are used as cardboard packing after assembling the tubular body, so that when the packing recess is fitted onto an electric product or the like and housed in the packing box, the cardboard packing is placed on the inner surface of the packing box. It has a function to be fixed in contact with and to prevent it from shifting. The protruding pieces 29, 29 are formed in a tapered shape so that when the corrugated cardboard packing is inserted into the packaging box through the upper opening of the packaging box, it can be easily stored in the packaging box.

Next, the assembly of FIG. 14 will be described in the order of FIGS.

FIG. 7 shows the side surfaces A, B, C, and
D and the connecting piece 23 are bent along the boundary line 21a of each boundary, while the concave portion forming piece 27 consisting of the surfaces A1 and B1 is bent into a concave shape by the ruled line 21a and the notch 22c to form a concave portion. The state is shown in which the cylindrical body 31 is joined (fixed) at the side end portion. In this state, the base piece 23a of the connecting piece 23 is connected to a part of the side surface A (the portion having the width L5 in FIG. 14), and the bending piece 23b extended to the base piece 23a is bent to form the recess forming piece 27.
The inner surface of the cylindrical body 31 is in contact with the surface A1. The joining piece 23 and the side end portion of the side surface A are joined by using a staple (staple), an adhesive material, or an adhesive tape.

FIG. 8 shows a perspective view seen from the back side of FIG. The support pieces 28, 28 are notched 22d, 22d (see FIG.
It is possible to rotate by the ruled lines 21b and 21b according to the reference), and in this figure, a state in which the ruled lines 21b and 21b are pulled slightly to the front is shown for easy understanding.

FIG. 9 shows the supporting pieces 28, 28 in the state of FIG.
Shows a state in which the free ends of the support pieces 28, 28 are pushed into the inside of the cylindrical body 31 by rotating and bending the respective support ends in the direction of the arrow (see FIG. 8). FIG. 9 is a view from above, and in this state, the free ends of the support pieces 28, 28 are bent at substantially right angles, and the support pieces 28, 2 are
The free ends of the contact pieces 8 are in contact with the inner surface of the surface A1 of the recess forming piece 27, and the free ends of the supporting pieces 28, 28 are brought into contact with both ends of the bending pieces 23b of the connecting piece 23 for positioning. It has become so. In this state, the support piece 2
The free end portions of the supporting pieces 28 and 28 enter between the lower surface of the surface A1 and the surface D of the recess forming piece 27 to support the surface A1 from below, and the upper end portions of the supporting pieces 28 and 28 (see FIG. 14 is the width L7 portion) and the back surface of the surface B1 of the recess forming piece 27 and the surface C
It comes into the gap between and, and the surface B1 is supported from the back. As can be seen from FIG. 8, the free ends of the supporting pieces 28, 28 have a stepwise direction in the height direction, so that sufficient strength can be obtained to support the surface A1.

After that, as shown in FIG. 10, two sets of reinforcing pieces 24 and 26 are folded inside the side surfaces A and B so as to enter the insides of both ends of the opening of the tubular body 31, and further, the left and right insertion pieces 2 respectively.
The notches 22a centering on the insert facing pieces 25b, 25b on the outer peripheral portions of 5, 5 and 25 are mountain-folded (the insert pieces 25 of FIG.
(Fold from the state of 25 so that it is pulled toward you) The ruled lines 21c, 21c on both sides are folded inward so as to be folded inside the side faces A, B.

FIG. 11 shows a state in which a pair of reinforcing pieces 24 and 26 are folded from the state of FIG. 10 to the inner surfaces of the side surfaces A and B. In this state, the open ends of the side surfaces A and B are reinforced, and the bent piece 24b of the reinforcing piece 24 enters between the lower surface of the surface A1 and the surface D of the recess forming piece 27, and the surface A1 is pressed from below. In the supported state, the bent piece 26b of the reinforcing piece 26 enters between the back surface and the surface C of the surface B1 of the recess forming piece 27, and the surface B1 is supported from the back surface.

FIG. 12 shows the insertion facing piece 2 from the state of FIG.
5b and 25b are inserted into the opening end of the tubular body 31 in the direction of the arrow (FIG. 11), and both sides of the opening of the tubular body 31 are closed by the blocking pieces 25a and 25a (corrugated cardboard packing 3
2 shows the completed state). Although the left opening is closed in the figure, the right opening is also closed by a pair of closing pieces 25a, 25a. In this state, the inserted outer peripheral portions of the insertion facing pieces 25b, 25b come into contact with the end faces of the recesses already formed by the recess forming pieces 27, so that the closing piece 25a connected to the insertion facing pieces 25b, 25b. , 25a are positioned with the opening closed (that is, the closing pieces 25a, 25a do not go deeper than necessary into the opening). In addition, in each of the pair of closing pieces 25a, 25a, the arrow direction in FIG. 12 is the step direction, and the outline lines LA, LB of each of the pair of closing pieces 25a, 25a are the opening end portions of the side surfaces A, B. It will be in contact with the inner surface (reinforced part). Therefore, for example, even when a load is applied to the side surface B or the side surface A from the outside, both ends of the cylindrical body 31 are always supported in the step direction against these loads, so that damage such as crushing is prevented. can do.

FIG. 13 shows a perspective view seen from the back side of FIG.

According to the embodiment shown in FIGS. 7 to 14 described above, in addition to the embodiment shown in FIGS. 1 to 5, a concave portion for forming a concave portion to be fitted on the ridge line and the corner portion of the product is formed. Forming piece 2
7 is provided, and support pieces 28 for supporting the recess from the inside of the cylinder 31 by cutting into one surface of the cylinder 31 are provided. Therefore, a paper body such as a corrugated board constitutes a packing for heavy objects. However, the recess for external fitting of the product can obtain sufficient strength against a drop impact or the like. Furthermore, the base pieces 2 that mainly reinforce the inner surfaces of the open ends are provided with the reinforcing pieces 24 and 26.
4a and 26a and the bent pieces 24b and 26b extending from part of the base pieces 24a and 26a, the opening end of the tubular body 31 can be reinforced and the bent piece 24a
The recesses can be supported from the inside of the cylinder 31 by b and 26b, and the recesses for external fitting of the product can further increase the strength against a drop impact or the like.

As another embodiment of the present invention, the structure in which the reinforcing pieces 24 and 26 are removed from the embodiment of FIGS. 7 to 14 may be adopted. As described above, even if the reinforcing pieces 24 and 26 are removed, the closing pieces 25a and 25a and the insertion facing pieces 25b and 25
Since there is the insertion piece 25 composed of b and b, when the opening of the cylindrical body 31 is closed by the closing pieces 25a, 25a, the insertion facing pieces 25b, 25b reinforce the opening from the inner surface to the outside.

Further, as another embodiment of the present invention, FIG.
14 may have a configuration in which the bending pieces 24b and 26b are removed from the reinforcing pieces 24 and 26 (or the same configuration as the reinforcing pieces of the embodiments of FIGS. 1 to 5). Even if the bending pieces 24b and 26b are removed in this manner, the supporting piece 2
8 and 28 can support the concave portion for external fitting of the product from the inside of the tubular body 31, and the base end pieces 24a and 26a can reinforce the open end portion of the tubular body 31.

In the embodiment described above, the side surface is composed of four surfaces. However, the present invention can be applied to a cylindrical body in which the side surface is composed of more surfaces. Is.

[0050]

As described above, according to the present invention, it is possible to use a material which is easy to dispose of and is non-polluting, and to burn it when it is no longer needed. It is possible to realize a shock-proof cylindrical support and cardboard packing.

[Brief description of drawings]

FIG. 1 is a perspective view showing a reinforcing structure for a cylindrical column according to an embodiment of the present invention.

FIG. 2 is a perspective view showing assembly from the state of FIG.

FIG. 3 is a perspective view showing assembly from the state of FIG.

FIG. 4 is a perspective view showing a state where assembly of a cylindrical support is completed.

5 is a development view of the cylindrical column of the embodiment of FIG.

FIG. 6 is a perspective view showing the structure of cardboard.

FIG. 7 is a perspective view showing a corrugated board packing using a reinforcing structure for a cylindrical support according to an embodiment of the present invention.

FIG. 8 is a perspective view seen from the back side of FIG.

9 is a plan view showing the assembly from the state of FIG.

FIG. 10 is a perspective view showing assembly from the state of FIG.

11 is a perspective view showing assembly from the state of FIG.

FIG. 12 is a perspective view showing a state where the assembling of the cardboard packing is completed.

13 is a perspective view seen from the back side of FIG.

14 is a development view of the cardboard packing of the embodiment of FIG.

FIG. 15 is a perspective view showing a conventional styrofoam packing together with a product.

16 is a perspective view showing a state in which the product and the packing shown in FIG. 15 are stored in a packaging box.

[Explanation of symbols]

 11a to 11c, 21a to 21c ... Ruled lines 12a, 22a to 22e ... Notches 13, 23 ... Coupling pieces 14, 16, 24, 26 ... Reinforcing pieces 15, 25 ... Inserting pieces 15a, 25a ... Closing pieces 15b, 25b ... Difference Incoming facing pieces 17, 31 ... Cylindrical body 18 ... Reinforcement structure of cylindrical support 27 ... Recess forming piece 28 ... Supporting piece 29 ... Projecting piece 32 ... Corrugated cardboard packing

Claims (10)

[Claims] 1. A tubular body formed by bending a plate body into a columnar shape, and extending at both ends on the opening side of at least two surfaces constituting the side surfaces of the tubular body, and opening by bending to the inner surface of the tubular body. A closing piece that closes the end on the side of the closing piece, and an insertion facing piece that extends in a V-shape so as to be bendable around the outer periphery of the central portion of the closing piece. Both ends of the insertion facing piece face the opening side. And a plug-in piece for closing the openings at both ends of the cylindrical body with the closing pieces by being folded into the end portions thereof. 2. A tubular body formed by bending a plate body into a columnar shape, and extending at both ends on the opening side of at least one surface constituting the side surface of the tubular body, and bending toward the inner surface of the tubular body on the opening side. At least a pair of reinforcing pieces that reinforce both end portions of the tubular body, which constitutes a side surface of the tubular body, and is extended to both end portions on the opening side in a plurality of surfaces facing the surface on which the reinforcing piece is formed,
The plugging facing piece includes a blocking piece that closes the end portion on the opening side by bending to the inner surface of the cylinder, and a plugging facing piece that extends in a V shape so as to be bendable around the outer periphery of the central portion of the plugging piece. Reinforcing structure for a cylindrical column, comprising: a plug-in piece for closing the openings at both ends of the tubular body with the closing pieces by folding both ends of the same into the opening-side end portion having the reinforcing piece. . 3. A tubular body formed by bending a plate into a columnar shape, and extending at both ends on the opening side of at least two surfaces forming the side surfaces of the tubular body, and opening by bending to the inner surface of the tubular body. A closing piece that closes the end on the side of the closing piece, and an insertion facing piece that extends in a V-shape so as to be bendable around the outer periphery of the central portion of the closing piece. Both ends of the insertion facing piece face the opening side. It is formed by inserting a plurality of incisions over at least two surfaces constituting the side surface of the tubular body, and a plug-in piece for closing the openings at both ends of the tubular body with the closing pieces by folding the tubular body at the ends thereof. A concave portion forming piece that forms a concave portion on the side surface of the cylindrical body by bending, and a foldable portion by making cuts on surfaces of the cylindrical body other than a plurality of surfaces on which the concave portion forming pieces are formed. With the free end side of the cylinder Cardboard packing, characterized by comprising a support piece for supporting the recesses by the recess forming member from the interior tubular body by pushing the inside. 4. A tubular body formed by bending a plate into a columnar shape, and extending at both ends on the opening side of at least one surface constituting the side surface of the tubular body, and bending the same toward the inner surface of the tubular body. At least a pair of reinforcing pieces that reinforce both end portions of the tubular body, which constitutes a side surface of the tubular body, and is extended to both end portions on the opening side in a plurality of surfaces facing the surface on which the reinforcing piece is formed,
The plugging facing piece includes a blocking piece that closes the end portion on the opening side by bending to the inner surface of the cylinder, and a plugging facing piece that extends in a V shape so as to be bendable around the outer periphery of the central portion of the plugging piece. A plug-in piece for closing the openings at both ends of the cylinder with the closing pieces by folding both ends of the plug into the end on the opening side having the reinforcing piece, and at least two surfaces constituting the side surface of the cylinder. Is formed by making a plurality of cuts on the side surface of the cylindrical body to form a concave portion on the side surface of the cylindrical body, and a surface of the cylindrical body other than the plurality of surfaces on which the concave formation piece is formed. It is formed so as to be bendable by making a notch, and is provided with a support piece that supports the recess formed by the recess forming piece from the inside of the cylinder by pushing the free end side into the inside of the cylinder. Step Le packing. 5. A tubular body formed by bending a plate into a columnar shape, and a tubular body formed by making a plurality of cuts over at least two surfaces constituting the side surface of the tubular body. A concave portion forming piece that forms a concave portion on the side surface of the cylindrical body, and a portion that is foldable by making cuts on a surface of the cylindrical body other than a plurality of surfaces on which the concave portion forming pieces are formed. A support piece for supporting the recess formed by the recess forming piece from the inside of the cylinder by pushing the inside of the cylinder, and extending at both ends on the opening side of at least one surface forming the side surface of the cylinder, A base piece that reinforces both end portions on the opening side by bending to, and a foldable extension on a part of the base piece, and presses the free end side and the support end side into the opening of the cylindrical body A reinforcing piece composed of a bent piece for supporting the recess formed by the forming piece from the inside of the cylinder, and extending to both end portions on the opening side of a plurality of surfaces constituting the side surface of the cylinder facing the surface on which the reinforcing piece is formed. Was set up,
The plugging facing piece includes a blocking piece that closes the end portion on the opening side by bending to the inner surface of the cylinder, and a plugging facing piece that extends in a V shape so as to be bendable around the outer periphery of the central portion of the plugging piece. A corrugated cardboard packing, comprising: a plug-in piece for closing the openings at both ends of the tubular body with the closing pieces by folding both ends of the same into the opening-side end portions having the reinforcing pieces. 6. The tubular strut reinforcing structure according to claim 1, wherein the tubular body is formed by bending a plate body having a connecting piece at one end and connecting the plate body with the connecting piece. Is characterized by. 7. The corrugated board packing according to claim 3, 4 or 5, wherein a plate body having a joining piece at one end is bent and joined by the joining piece to form a tubular shape. A piece
A base piece having projecting portions at both ends and fixed to a part of the plate body, and arranged to be in contact with the inner surface of the recess formed by the recess forming piece when the base piece is provided so as to be connected to the base piece. It is characterized in that it is configured with a bent piece. 8. The corrugated board packing according to claim 3, 4 or 5, wherein projecting pieces for preventing packing deviation are formed integrally with the tubular body at both ends of the side surface of the tubular body on the opening side. Characterize. 9. The reinforcing structure for a cylindrical column according to claim 1 or 2, wherein corrugated cardboard is used as a material for forming the cylindrical column, and a step direction thereof is a direction orthogonal to a tubular direction of the tubular body. Is characterized by. 10. The corrugated board packing according to claim 3, 4 or 5, wherein the corrugated board corrugation direction is a direction orthogonal to the cylindrical direction of the cylindrical body.