JP2002002828A - Folding type heat-insulation box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding type heat-insulation box which is excellent in heat-insulating property. SOLUTION: A cushioning sheet 40 has a large number of chambers 41 in which air is enclosed. A heat-insulating sheet member 4 is formed in such a manner that the cushion sheet 40 is pasted on and covered with an aluminum foil 42. This heat-insulation box is formed of such a heat-insulating sheet member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated box used for transporting foods and medicines, and more particularly to a foldable insulated box formed of a flexible material.

[0002]

2. Description of the Related Art A conventional foldable heat insulating box is formed of a heat insulating sheet member in which a foam sheet is sandwiched between synthetic resin sheets. In the heat insulating sheet member, since the foamed sheet has a low tensile strength, a strong resin sheet must be used for the outer and inner surfaces of the box, and the cost of the heat insulating sheet increases. . Further, when used for refrigeration, there is a problem that the inner resin sheet deteriorates at a low temperature and is easily broken.

The present invention attempts to use a cushioning sheet, which is used exclusively as a cushioning material, in which a large number of small chambers containing air are regularly provided at close intervals, as a heat insulating material. The conventional problem was solved by coating the aluminum foil with the heat insulating property and the lack of strength of the cushioning sheet alone, and a heat insulating box excellent in heat insulating property, durability and cost was successfully provided.

[0004]

Means for Solving the Problems A heat insulating box according to the present invention is a heat insulating sheet in which an aluminum foil (42) is bonded to a flat surface of a cushioning sheet (40) provided with a number of small chambers (41) containing air. It is formed by a member (4).

[0005]

[Function and Effect] A cushioning sheet (4) in which a number of small chambers (41) containing air are regularly provided at close intervals.
0) (hereinafter referred to as cushioning sheet) alone has insufficient tensile strength to form a box, and has insufficient heat insulating properties in portions other than the small chamber (41). The aluminum foil (42) alone is strong against pulling, but weak against the force in the tearing direction, does not disappear when wrinkles occur, and breaks apart when rolled and opened. Therefore, it cannot be used for applications that bend repeatedly.

However, when an aluminum foil (42) is attached to the flat surface (44) of the cushioning sheet (40), the advantages of each other compensate for the disadvantages of the other, and the tensile strength is high and the force in the tearing direction is reduced. A strong heat insulating sheet member (4) is obtained. This heat insulating sheet member (4) is suitable for use as a box that can be folded and used repeatedly without breaking the aluminum foil (42) or breaking it apart even if it is repeatedly bent or folded. . Further, the aluminum foil (42) reflects light and heat, so that the heat insulating property is improved as compared with the cushioning sheet (40) alone.

The cushioning sheet (40) has a large number of small chambers (4
Due to the presence of 1), the cushioning property is extremely good, so that when the articles to be kept warm are put into the box or when they are transported, the impact on the articles can be reduced, and the articles, of course,
The box itself can be prevented from being damaged.

An aluminum foil (42) coated with a thermoplastic resin is heat-welded to the smooth surface (44) of the cushioning sheet (40) to easily and efficiently manufacture the heat-insulating sheet member (4). The box can be manufactured with a low-cost heat insulating sheet member (4), and the box can be provided at a low cost. Further, since the cushioning sheet (40) and the aluminum foil (42) are lightweight, the weight of the box can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, the heat insulation box of the embodiment is formed in a horizontally elongated rectangular parallelepiped with an upper surface opening, and lid flaps (13) (14) (22) are formed on four sides of the opening edge. ) (22), and a hook-and-loop fastener (3) provided on the lid flap
(30) can keep the lid flap closed. The box is formed of a flexible material described later and can be freely deformed, but is sewn with a sewing machine so that it can be folded at the center in the height direction (see FIG. 3) (19) (24) (25) Fold line.

As shown in FIG. 4, the heat retaining box is formed by three pieces, a central piece (1) and two end pieces (2) and (2). The central piece (1) is a rectangular sheet composed of the bottom surface (11) of the box, a pair of opposed side surfaces (12) (12), and large and small lid flaps (13) (14) connected to both side surfaces. The end pieces (2) are rectangular sheets each comprising an end face (21) of the box and a lid flap (22) connected to the end face.

FIG. 5 shows a cross section of a sheet material constituting each of the pieces (1) and (2). The sheet material corresponds to the small chamber (41) side of the two heat insulating sheet members (4) and (4). They are opposed to each other, and a reinforcing sheet (5) is sandwiched between them to form a plate. As shown in FIG. 6, the heat insulating sheet member (4) has a large number of small chambers (4) containing air.
1) The cushioning sheet (40), which protrudes regularly at a close interval, is provided on a flat surface of the cushioning sheet (40).
An aluminum foil (42) is attached to the entire surface of (44). For bonding of the aluminum foil (42), the aluminum foil (42) is coated with a thermoplastic resin in advance, and the thermoplastic resin layer (43) is coated with a cushion sheet.
This is performed by superimposing and thermally welding the flat surface (44) of (40).

As shown in FIG. 5, each piece (1) (2) (2)
Uses a non-woven fabric for the reinforcing sheet (5) with the surface of the aluminum foil (42) of the heat-insulating sheet member (4) facing outside, and a reinforcing tape (6) applied over the entire outer periphery of the sheet. Covered and sewn. The reinforcing tape (6) of the embodiment is a thick cotton tape.

In addition to the folding stitches (19) and (19), the center piece (1) has a boundary (15) and a side (12) between the bottom surface (11) and the side surface (12) of the box. The boundaries (16) and (16) between the (12) and the lid flaps (13) and (14) are also sewn (17) and (18). In addition to the end piece (2) and the folding stitches (24) and (25), sewing is performed on the boundary (23) between the end face (21) and the lid flap (22).
(26) is given. Sewing for folding the end piece (2) (2
4) (25) are horizontal stitches (24) located at the center of the height of the end face (21), and horizontal stitches from four corners of the end face (21) toward the center of the end face (21). Four diagonal stitches (25) reaching 24). Each of the above sewing (17) (18) (19) (24) (25) (26) is made by sewing, and a heat insulating sheet member stacked on two sheets
(4) (4) and the reinforcing sheet (5) are integrated. Further sewing
(17) (18) (19) (24) (25) (26) The small chamber (41) located above the needle will be withered due to the penetration of the needle and the pulling of the thread. In the position, the pieces are compressed and grooved.

As shown in FIG. 1, a male fastener member (31) is attached to the inner surface of the large lid flap (13) of the central piece (1) over substantially the entire length on the free end side, and the small lid flap (14). A female fastener member (32) is attached over substantially the entire length of the free end side of the outer surface, and both members (31) and (32) are provided with a surface fastener (3).
Is composed. As shown in FIG. 2, a male fastener member (31) is attached to the free end side of the inner surface of the lid flap (22) of the end piece (2).
A female fastener member (32) is attached to the outer surface of the large lid flap (13) of the central piece (1) at a position corresponding to the male fastener member (31) of the end piece (2). The members (31) and (32) constitute a hook-and-loop fastener (30).

As shown in FIG. 1, on the inner surface of the large lid flap (13), a bag (7) for accommodating the cooling agent (8) is sewn at a position which does not interfere with the small lid flap (14). I have.

As shown in FIG. 4, the bottom (1) of the central piece (1) is
1) and the edges of the side faces (12) and (12) and the end faces (2) and (2)
1) The lower edge and both side edges of (21) are sewn to complete the box of FIG. Box bottom (11) and side (12) (12), side (1
2) The borders (15) and (16) between (12) and the lid flaps (13) and (14) and the border (23) between the end face (21) and the lid flap (22) are respectively sewn by sewing. 17) Since it is concave in a groove shape due to (18) and (26), even if the box is formed of a thick piece (1) (2) (2) that is difficult to adjust the bending shape, the boundary line (15) ( 16) In (23), it bends in a square shape, and as shown in FIG.

However, when the heat insulation box is used as a cooler box, a cooling agent is added to the bag (8) on the lid flap (13).
(8) is accommodated. Put the items to be kept cool in the box,
As shown in FIG. 2, the large lid flap (13) is put on the small lid flap (14) and fixed with the hook-and-loop fastener (3), and the lid flaps (22) and (22) of both end pieces (2) and (2) are attached to the center piece ( 1) Both lid flaps (1
3) Lay on (14), stop with hook and loop fastener (30) and close the box. The cool air of the cooling agent (8) convects and the inside of the box is filled with cool air. Due to the good heat insulating properties of the pieces (1), (2) and (2) constituting the box, the temperature in the box can be maintained at a low temperature, and the cooling effect is high.

When the empty box is closed with four flaps and pressed from above, the box is easily bent at the groove-shaped concave portion by sewing (19), (24) and (25), as shown in FIG. Can be folded flat.

As shown in the embodiment of FIG. 5, a heat insulating sheet member
(4) When (4) is used in two layers, the heat insulating effect is further enhanced. If a reinforcing sheet (5) is interposed between two heat-insulating sheet members (4) with the aluminum foil (42) facing outside, the strength of the box can be further increased.

By interposing the reinforcing sheet (5), the sheet can be used when the sewing (17) (18) (19) (24) (25) (26) and the reinforcing tape (6) are sewn. Of the heat insulating sheet member (4) and the aluminum foil (42) due to the needle hole.

The box of the embodiment has a bottom piece (11), opposed side faces (12), (12), and a central piece (1) whose outer peripheral edge is reinforced by a reinforcing tape (6) all around. ), The outer edge of the box has an end face (21) and the reinforcing tape extends over the entire circumference.
Since the two end pieces (2) and (2) reinforced by (6) are sewn together, the reinforcing tape (6) is extremely effective when a vertical tensile force is applied to each piece. work.

When the center piece (1) and the end piece (2) are sewn together, they can be sewn on the reinforcing tapes (6) and (6), thereby increasing the strength of the sewn.

It should be noted that the heat retaining box can of course also be used to keep warm drinking water or the like.

If the heat insulation box is used by being fitted into a synthetic resin frame (not shown) with a bottom, the box is not deformed and can be stably stacked and stored.

The present invention is not limited to the configuration of the above embodiment, and various modifications are possible within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a perspective view of a box.

FIG. 2 is a perspective view of the box with the lid flap of the central piece closed.

FIG. 3 is a perspective view of the box in a folded state.

FIG. 4 is a perspective view of the box disassembled into three pieces.

FIG. 5 is a sectional view taken along the line AA of FIG. 1;

FIG. 6 is a sectional view of a heat insulating sheet member.

[Explanation of symbols]

 (1) Central piece (11) Bottom surface (12) Side surface (13) Lid flap (14) Lid flap (2) End piece (21) End face (22) Lid flap (4) Heat insulating sheet member (40) Cushion sheet (41) Komuro (42) Aluminum foil (5) Reinforcement sheet (6) Reinforcement tape

Claims (4)

[Claims] A large number of small chambers (41) containing air are provided on a flat surface (44) of a cushioning sheet (40) by an aluminum foil (4).
A foldable heat insulation box formed by a heat insulating sheet member (4) to which 2) is attached. 2. The two heat insulating sheet members (4) and (4) each having an aluminum foil (42) on the outer side.
The foldable heat insulating box according to claim 1, wherein the reinforcing sheet (5) is sandwiched between (4). 3. The box comprises three pieces, a central piece (1) and two end pieces (2), (2).
(1) The bottom of the box (11), a pair of opposite sides (12)
(12) and lid flaps (13) and (14) that are continuous on both side surfaces, and the end pieces (2) and (2)
And a lid flap (22) continuous with the end face. The outer peripheral edges of the three pieces (1), (2) and (2) are wrapped and sewn around the entire circumference with a reinforcing tape (6), and a central piece is provided. 3. The foldable thermal insulation according to claim 1, wherein the edges of the bottom surface (11) and the side surfaces (12) and (12) of (1) and the edge of the end surface (21) of the end piece (2) are sewn. box. 4. The fold line for folding can be folded such that the opening surface approaches the bottom surface (11), the fold line for folding, the boundary line between the bottom surface and the side surface of the central piece, the boundary line between the side surface and the lid flap, and The end face of the end piece and the boundary line of the lid flap are sewn by sewing through the front and back of the piece,
The foldable heat insulation box according to any one of claims 1 to 3, wherein the sewn portion of each piece is recessed in a groove shape.