JP7137191B2 - folding container - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding container that is used for receiving parcels and storing various articles, and that can be folded so as not to be bulky when not in use.

As a collapsible container used for receiving parcels, Patent Document 1 listed below describes a container as shown in FIG. 11 . This collapsible container comprises a bottom plate 71 , a front plate 72 , a rear plate 73 , a pair of side plates 74 and a lid 75 .

The bottom plate 71 and the rear plate 73, the front plate 72 and the pair of side plates 74, the rear plate 73 and the pair of side plates 74, and the rear plate 73 and the lid 75 are rotatably connected, and the side plates 74 are connected in the width direction. It can be folded when not in use by being flexible at its central portion.

When using such a collapsible container, as an assembled state, after the parcels are stored in the container, the lid 75 is closed, and the lock insertion hole 72a in the upper portion of the front plate 72 and the front portion of the lid 75 are closed. The shackle 91a of the lock 91 is inserted into the lock insertion hole 75a of the door to prevent the theft of the parcel.

Also known is a collapsible container as shown in FIG. This collapsible container is composed of a base plate 81, a base member 82, a pair of side wall members 83 and an upper frame 84. A front plate 86 and a rear plate 87 extending from a base plate 85 of the base member 82 are provided from the lower end to the upper end. A downward fold line 88a, a Nakatani fold line 88b, and an upward fold line 88c are inserted.

When the folding container is assembled, the front plate 86 and the rear plate 87 stand upright without being bent, the side plates 89 of the pair of side wall members 83 hang down from the upper frame 84, and both sides of the side plates 89 extend toward the front plate. 86 and the inner surface of the rear plate 87. As shown in FIG. In addition, the top surface is open because it is not necessary to provide a lid except for the top layer when stacking.

In the folded state, the pair of side plates 89 are flipped up inward, and the front plate 86 and rear plate 87 are folded inwardly around the downward fold line 88a, the Nakatani fold line 88b, and the upward fold line 88c.

Registered Utility Model No. 3013613

However, the folding container shown in FIG. 11 has a problem that if the height dimension is set large, the dimension in the folded state becomes correspondingly large.

In the folding container shown in FIG. 12, when folded, the front plate 86 and the rear plate 87 are half the height dimension H in the assembled state, and are abutted at the Nakatani folding line 88b. There is a problem that the dimension H cannot be set larger than the width dimension W, which is the interval between the front plate 86 and the rear plate 87 .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a foldable container that can be folded compactly even if the size in the height direction is large.

In order to solve the above-described problems, the collapsible container according to the present invention provides a base plate having a bottom plate, a basic member having a front plate and a rear plate connected to each other with the bottom plate sandwiched therebetween, and a pair of side walls having side plates. Consists of a member and an upper frame forming a rectangular frame,
In the basic member, a lower mountain fold line, a lower valley fold line, a middle mountain fold line, an upper valley fold line, and an upper mountain fold line are put in the front plate and the rear plate from the lower end to the upper end, and the upper mountain fold line is put in the upper part of the side wall member,
A base plate is superimposed and fixed to the upper surface of the bottom plate, a base member is attached to the upper frame at upper portions of the front plate and the rear plate, a pair of side wall members are attached to the upper frame at upper portions of the side plates,
In the assembled state, the front plate and the rear plate stand upright without bending, and the pair of side plates hangs down from the upper frame and is sandwiched between the inner surfaces of the front plate and the rear plate,
In the folded state, the pair of side plates are flipped up by being folded inward about the Kamiyama fold line, and the front plate and the rear plate are folded about the Shimoyama fold line, the Shimoya fold line, the Nakayama fold line, the Kamiya fold line, and the Kamiyama fold line. It was designed to be able to be folded inward at any time.

In addition, in order to increase the pressure resistance strength, on both sides of the side plate of the side wall member, mounting pieces of a reinforcing member having an L-shaped cross section are attached, and protruding pieces of the reinforcing member protrude from the mounting pieces at a right angle,
In the assembled state, the protruding pieces of the reinforcing members of the pair of side plates are arranged along the inner surfaces of the front plate and the rear plate from below the lower fold line to above the upper fold line.

In addition, in order to improve shape retention, on both sides of the side plate of the side wall member, a flexible holding piece is attached so as to protrude from the central portion in the height direction, and the inner surface of the protruding portion of the holding piece is attached. Hook-and-loop fasteners are provided on the outer surfaces of the front plate and the rear plate on the part sandwiching the Nakayama folding line,
In the assembled state, the overhanging portions of the holding pieces are bent from both sides of the side plates and fixed to the outer surfaces of the front plate and the rear plate at portions sandwiching the Nakayama crease line with hook-and-loop fasteners.

Furthermore, in order to improve crime prevention, a lid having a top plate having a peripheral edge shape corresponding to the upper frame is provided, and a front flap is connected to the front end of the top plate in the lid via a front fold line so as to be freely bendable,
The lid is swingably attached to the upper frame at the rear part of the top plate,
In the assembled state, the lid is closed, the front flap is bent downward about the front fold line, the lock receiving portion of the lock receiving device protrudes from the lock receiving insertion hole of the front flap, and the seat portion of the lock receiving device extends. It was supposed to be hidden by the front flap.

In the collapsible container according to the present invention, the front plate and the rear plate are folded inward in the shape of a folding screen about the lower fold line, the lower valley fold line, the middle mountain fold line, the upper valley fold line, and the upper mountain fold line. By setting the height dimension in the state to be larger than the width dimension, which is the gap between the front plate and the rear plate, bulky articles can be stored.

Even if the height dimension is set to be large in this way, the occupied area in the flat state does not become large, it can be folded compactly, and when not in use, it can be stored in a non-bulky state. .

Also, if the protruding pieces of the L-shaped cross section reinforcing members attached to both sides of the side plate are arranged along the inner surface of the front plate and the rear plate from below the lower fold line to above the upper fold line, the assembled state can be improved. Bending of the front plate and the rear plate is suppressed, and strength against pressure is ensured.

Furthermore, when the holding pieces are attached so as to protrude from both sides of the side plate, the projecting portions of the holding pieces are bent in the assembled state, and fixed to the portions across the Nakayama crease lines of the outer surfaces of the front plate and the rear plate, the front plate and the rear plate are fixed. Expansion of the rear plate can be prevented.

In addition, if necessary, a lid with a top plate is attached to the upper frame, the lid is closed in the assembled state, and the front flap of the lid covers the seat of the lock receiving device. The seat portion cannot be removed, and security can be enhanced.

1 is a perspective view showing an assembled and locked state of a collapsible container according to an embodiment of the present invention; FIG. The perspective view which shows an assembly / folding process same as the above. The perspective view which shows an assembly / folding process same as the above. The perspective view which shows a folding state same as the above. Vertical front view along the VV line in Fig. 1 Vertical side view along the VI-VI line in Fig. 1 Diagram showing the deployed state of the same bottom plate The figure which shows the deployment state of the basic member same as the above. The figure which shows the expansion|deployment state of the side wall member same as the above. The figure which shows the unfolded state of the cover same as the above. (11A) Perspective view showing the assembled and locked state of the folding container described in Patent Document 1, (11B) Perspective view showing the same assembly/folding process (12A) Perspective view showing an assembled state of a conventional collapsible container, (12B) Perspective view showing the same assembly/folding process

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, this collapsible container has a rectangular parallelepiped shape when assembled and locked. 3. Consists of a lid 4 forming a top surface and an upper frame 5 of a rectangular frame. Note that the lid 4 may be omitted if it is used for a tier below the top tier during stacking.

The base plate 1, the base member 2, the side wall member 3 and the lid 4 are made of a plastic sheet, and more specifically, a hollow plastic corrugated board made of polypropylene or the like and having a large number of ribs.

In addition, when high security is required, a solid sheet made of any of polypropylene, polyethylene, polyethylene terephthalate, acrylic, polycarbonate, etc. so that it can withstand cutting with a sharp knife. may be In addition, it may be made of a metal plate such as aluminum.

The thickness of the plastic sheets for the base plate 1, base member 2, side wall member 3 and lid 4 is 1 mm to 10 mm, depending on the size and required strength of the collapsible container.

The upper frame 5 is made of polyethylene or the like, which has excellent strength against impact and high toughness. A load collapse prevention piece 54 projecting upward is provided.

As shown in FIG. 7 in an unfolded state, the bottom plate 1 has a structure in which stopper pieces 12 are continuously provided on each edge around the bottom plate 11. When manufactured, the stopper pieces 12 are attached to the bottom plate 11. As shown in FIG. is bent upwards. This bending is heat bending, which is performed by pressing with a heat bar, bending in a softened state with heating, and plastically deforming with slow cooling.

Further, as shown in FIG. 8 in the unfolded state, the base member 2 has a front plate 22 and a rear plate 23 connected with a bottom plate 21 therebetween. It has a configuration in which joint pieces 24 are arranged in a row on each side.

On the front plate 22 and the rear plate 23, a downward fold line 25a, a downward fold line 25b, a middle fold line 25c, an upper fold line 25d, and an upper fold line 25e are evenly formed from the boundary with the base plate 21 to the boundary with the joint piece 24. They are placed in parallel at intervals.

The lower crease line 25a, the middle crease line 25c, and the upper crease line 25e are cut creases formed by cutting the plastic cardboard from the surface side to the back side. It is considered to be a thermal ruled line with a groove formed in a shape.

When a solid sheet such as polypropylene, polyethylene, polyethylene terephthalate, acrylic, or polycarbonate is used as a material, the lower crease line 25a, the middle crease line 25c, and the upper crease line 25e are not cut creases, but are melted from the surface side to form a V shape. A thermal ruled line having letter-shaped grooves may be used.

Engagement cutouts 26 are formed on both side ends of the bottom plate 21, and finger insertion recesses 26a are provided in the central portion of the edge on the far side of the engagement cutouts 26. As shown in FIG.

The engagement cutout 26 is engaged with the engagement piece 33 of the side wall member 3 to improve crime prevention. Alternatively, the engaging piece 33 may be omitted and the lower end of the side plate 31 of the side wall member 3 may be brought into contact with the bottom plate 21 .

Attached to the base member 2, a pair of reinforcing plates 27 having substantially the same width and greater height as the joint pieces 24 are used to reinforce the joint with the upper frame 5. As shown in FIG. The reinforcing plate 27 is also made of the same material as the base member 2.

Further, as shown in FIG. 9 in the unfolded state, the side wall member 3 has a joint piece 32 and an engaging piece 33 connected to the upper edge of the side plate 31 and the engaging piece 33 to the lower edge of the side plate 31, respectively. 31 is formed with a handle hole 31a.

At the boundary between the side plate 31 and the joining piece 32 and at the boundary between the side plate 31 and the engaging piece 33, an upper mountain fold line 34 and a lower mountain fold line 35 are inserted, respectively. It is a cut ruled line cut into the back side.

When a solid sheet such as polypropylene, polyethylene, polyethylene terephthalate, acrylic, polycarbonate, etc. is used as a material, the upper folding line 34 and the lower folding line 35 are not cut lines but are melted from the surface side to form V-shaped grooves. is formed as a thermal ruled line.

As shown in FIG. 10 in the unfolded state, the lid 4 has a connecting piece 42 on the rear edge of the top panel 41 and a front flap 43 on the front edge. A guard piece 44 is continuously provided in the front flap 43, and a slot-like lock receiving insertion hole 43a is formed in the central portion of the front flap 43. As shown in FIG.

A pair of guard pieces 44 are bent downward from the top plate 41 by thermal bending, and a rear fold line 45 and a front fold line 46 are formed at the boundary between the top plate 41 and the joint piece 42 and at the boundary between the top plate 41 and the front flap 43, respectively. is put in. The back fold line 45 and the front fold line 46 are cut ruled lines formed by cutting the plastic cardboard from the surface side to the back side.

When a solid sheet such as polypropylene, polyethylene, polyethylene terephthalate, acrylic, polycarbonate, etc. is used as a material, the back fold line 45 and the front fold line 46 are not incised creases, but are melted from the surface side to form V-shaped grooves. is formed as a thermal ruled line.

When manufacturing a collapsible container using the members as described above, the base plate 21 is overlaid on the upper surface of the bottom plate 11, and the base member 2 is fixed to the base plate 1 by welding or adhesive.

In addition, the base member 2 is attached to the upper frame 5 by joining the joint pieces 24 connected to the front plate 22 and the rear plate 23 to the front frame portion 51 and the rear frame portion 52, respectively, with the reinforcing plate 27 interposed therebetween. The side wall member 3 is attached to the upper frame 5 by joining the joint pieces 32 connected to the side plate 31 to the pair of side frame portions 53 respectively. The lid 4 is attached to the upper frame 5 by joining the joint piece 42 connected to the top plate 41 to the rear frame portion 52 .

In addition to metal rivets and resin rivets, these joints are made using double-sided tape or hot-melt adhesive, heat welding by pressing a high-temperature body, and ultrasonic welding that raises the temperature by applying ultrasonic vibrations and frictional heat. It can be done by

Prior to the above process, as shown in FIG. 1, mounting pieces 36a of reinforcing members 36, which are angle members having an L-shaped cross section, are mounted on both sides of the side plate 31 so as to extend from the lower end to the upper end. is attached, and the protruding piece 36b of the reinforcing member 36 protrudes inward from the mounting piece 36a at a right angle. A handle 37 is attached to the handle hole 31 a of the side plate 31 .

In addition, on the mounting pieces 36a of the reinforcing member 36 on both sides of the side plate 31, a holding piece 60 made of a thin plate material such as polypropylene, polyethylene, polyethylene terephthalate, etc. is protruded through a folding line 60a at the central portion in the height direction. Install as shown.

Hook-and-loop fasteners 61a are attached to the inner surface of the overhanging portion of the holding piece 60 and the portions of the outer surfaces of the front plate 22 and the rear plate 23 sandwiching the Nakayama folding line 25c. Hook-and-loop fasteners 61b are also attached to the outer surface of the attachment portion of the holding piece 60 to the reinforcing member 36 and the outer surface of the projecting portion from the reinforcing member 36 .

The folding lines 60a are two parallel pressing lines pressed from the front and back of the holding piece 60. One of the folding lines 60a is aligned with the ridgeline of the mounting piece 36a and the projecting piece 36b of the reinforcing member 36, and the other folding line 60a coincides with the ridgeline. The folding line 60a is carved outside one folding line 60a at a distance equal to the thickness of the front plate 22 or the rear plate 23 plus the thickness of the hook-and-loop fastener 61a.

Also, a metal lock receiver 55 is attached to the front frame portion 51 . The lock receiver 55 is composed of a seat portion 55a and a U-shaped lock hook portion 55b, and the seat portion 55a is fixed to the front frame portion 51 by screwing or the like. Further, hook-and-loop fasteners 62 are attached to the front surface of the reinforcing plate 27 and the rear surface of the front flap 43 so as to be positioned on both sides of the lock receiving insertion hole 43a.

To assemble the folding container manufactured in this manner for use, as shown in FIGS. The side plates 31 are suspended from the pair of side frame portions 53 respectively.

Further, the engaging piece 33 is bent inward from the side plate 31 about the descending fold line 35 to engage the engaging piece 33 with the engaging notch 26 of the bottom plate 21 .

In this state, the inward bending of the front plate 22 and the rear plate 23 is such that the protruding pieces 36b of the reinforcing members 36 on both sides of the side plate 31 are attached to the inner surfaces of the front plate 22 and the rear plate 23 from below the lower valley fold line 25b. The outward swinging of the front plate 22 and the rear plate 23 is prevented by the stopper piece 12 of the bottom board 1, by following the upper valley fold line 25d upward.

Further, the inward swinging of the side plate 31 is prevented by the engagement between the engaging piece 33 and the engaging notch 26, and the outward swinging of the side plate 31 is prevented by the stopper piece 12 of the bottom plate 1. be.

Here, the overhanging portions of the holding pieces 60 are bent from both sides of the side plate 31 around the other folding line 60a, and fixed to the portions of the outer surfaces of the front plate 22 and the rear plate 23 sandwiching the center fold line 25c with hook-and-loop fasteners 61a. As a result, the expansion of the front plate 22 and the rear plate 23 toward the outside around the fold line 25c is prevented, and the strength against pressure is improved.

After the parcel or the like is accommodated, the lid 4 is closed by folding the top plate 41 forward around the back fold line 45 at the boundary with the joining piece 42, and the front flap 43 is opened from the top plate 41 around the front fold line 46. , the front flap 43 is fixed to the reinforcing plate 27 with hook-and-loop fasteners 62, and the lock receiving portion 55b of the lock receiving tool 55 protrudes from the lock receiving insertion hole 43a.

After that, the shackle 91a of the lock 91 such as a padlock is inserted into the lock hooking portion 55b of the lock receiving device 55 to lock it, thereby preventing theft of the parcels to be delivered or the exhibits.

In such an assembled locked state, even if the side plate 31 is pushed from the outside, it does not swing inward and the side cannot be opened. Also, the gap between the top plate 41 and the side frame portion 53 is covered with the guard piece 44 . Since the seat portion 55a of the lock receiver 55 is covered with the front flap 43, the lock receiver 55 cannot be removed and the lid 4 cannot be opened.

On the other hand, when folding this folding container when not in use, as shown in FIG. , the inner surface of the front panel 22 and the rear panel 23.

Then, with the lid 4 open, insert a finger into the finger-insertion recess 26a and hook the edge of the engagement piece 33, pull up the tip of the engagement piece 33, and pull the side plate 31 from the surface side. The engaging piece 33 is pushed inward to disengage the engaging piece 26 from the engaging notch 26, and the pair of side plates 31 are bent inward around the Kamiyama folding line 34 at the boundary with the joining piece 32, thereby sequentially flipping up.

Next, as shown in FIG. 3, the front plate 22 and the rear plate 23 are folded inward in a folding screen shape around the lower folding line 25a, the lower folding line 25b, the middle folding line 25c, the upper folding line 25d, and the upper folding line 25e. At this time, on the outer surface side, the lower mountain fold line 25a, the middle mountain fold line 25c, and the upper mountain fold line 25e are bent convexly, and the lower valley fold line 25b and the upper valley fold line 25d are bent concavely.

Then, as shown in FIG. 4 , the front plate 22 and the rear plate 23 are folded over the bottom plate 21 , the front plate 22 and the rear plate 23 are overlapped with a pair of side plates 31 , and these are placed between the bottom plate 1 and the lid 4 . When it is sandwiched between the lid 1 and the lid 4, it becomes flattened and folded within the range of the size of the plane of the lid 4, so that it does not become bulky when stored indoors.

At this time, the lock 91 can be prevented from being lost by protruding the lock receiving portion 55b of the lock receiving member 55 from the lock receiving insertion hole 43a of the front flap 43 and hooking the shackle 91a of the lock 91 on the lock receiving portion 55b. can be done.

In the folding container as described above, the front plate 22 and the rear plate 23 are folded inward in a folding screen shape about the downward fold line 25a, the downward fold line 25b, the intermediate fold line 25c, the upward fold line 25d, and the upward fold line 25e. Since it is in a tatami state, as shown in FIG. 1, the height dimension H in the assembled state is set larger than the width dimension W, which is the gap between the front plate 22 and the rear plate 23, to accommodate bulky articles. can be done.

Even if the height dimension H is set to be large in this way, the occupied area in the flat state does not become large, and it can be folded compactly.

Further, when the base plate 1, the base member 2 and the side wall member 3 are made of plastic corrugated cardboard, the weight can be reduced even if the height dimension H is large.

Further, the front plate 22 and the rear plate 23 are bent by combining the lower crease lines 25a, the middle crease lines 25c and the upper crease lines 25e, which are the cut crease lines, and the lower crease lines 25b and the upper crease lines 25d, which are the thermal crease lines. It is possible to simplify the structure and reduce the manufacturing cost without using additional members or the like.

If the base plate 1, the base member 2, the side wall member 3, and the lid 4 are made of a metal plate such as aluminum, a hinge member is required for the movable portion. Weight may be reduced by using light plate materials.

1 Bottom plate 2 Basic member 3 Side wall member 4 Lid 5 Upper frame 11 Bottom plate 12 Stopper piece 21 Bottom plate 22 Front plate 23 Rear plate 24 Joint piece 25a Lower mountain fold line 25b Lower valley fold line 25c Nakayama fold line 25d Upper valley fold line 25e Upper mountain fold line 26 Engagement notch 26a Finger recess 27 Reinforcing plate 31 Side plate 31a Handle hole 32 Joining piece 33 Engaging piece 34 Upper fold line 35 Lower fold line 36 Reinforcement member 36a Mounting piece 36b Protruding piece 37 Handle handle 41 Top panel 42 Joining piece 43 Front flap 43a Lock receiving insertion hole 44 Guard piece 45 Rear fold line 46 Front fold line 51 Front frame portion 52 Rear frame portion 53 Side frame portion 54 Collapse prevention piece 55 Lock receiver 55a Seat portion 55b Lock hook portion 60 Holding piece 60a Fold lines 61a, 61b Hook-and-loop fastener 62 Hook-and-loop fastener 91 Lock 91a Shackle H Height dimension W Width dimension

Claims (3)

A base plate (1) having a bottom plate (11), a base member (2) in which a front plate (22) and a rear plate (23) are connected with a bottom plate (21) in between, and a pair of side plates (31). A collapsible container composed of a side wall member (3) and an upper frame (5) forming a rectangular frame,
In the basic member (2), the front plate (22) and the rear plate (23) are divided from the lower end to the upper end by the Shimoyama folding line (25a), the Shimoya folding line (25b), the Nakayama folding line (25c), the Umitani folding line (25d) and A Ueyama folding line (25e) is inserted, and the side wall member (3) is provided with an Ueyama folding line (34) at the top,
The bottom plate (21) is superimposed and fixed on the upper surface of the bottom plate (11), the basic member (2) is attached to the upper frame (5) at the upper portions of the front plate (22) and the rear plate (23), A pair of side wall members (3) are attached to the upper frame (5) at upper portions of the side plates (31),
On both sides of the side plate (31) of the side wall member (3), mounting pieces (36a) of the reinforcing member (36) having an L-shaped cross section are attached, and projecting pieces (36b) of the reinforcing member (36) are attached. Protrudes at a right angle from the mounting piece (36a),
In the assembled state, the front plate (22) and the rear plate (23) stand upright without bending, and the pair of side plates (31) hangs down from the upper frame (5) to form the front plate (22) and the rear plate (23). ), and the protruding pieces (36b) of the reinforcing members (36) of the pair of side plates (31) are aligned with the inner surfaces of the front plate (22) and the rear plate (23) along the valley fold line (25b). Along the upper part of the Umitani folding line (25d) from below,
In the folded state, the pair of side plates (31) are folded inward about the upward fold line (34) to be flipped up, and the front plate (22) and the rear plate (23) are folded into the downward fold line (25a) and the downward valley. A collapsible container characterized by being foldable inward in a folding screen shape around a folding line (25b), a Nakayama folding line (25c), an Umitani folding line (25d), and an Ueyama folding line (25e). A base plate (1) having a bottom plate (11), a base member (2) in which a front plate (22) and a rear plate (23) are connected with a bottom plate (21) in between, and a pair of side plates (31). A collapsible container composed of a side wall member (3) and an upper frame (5) forming a rectangular frame,
In the basic member (2), the front plate (22) and the rear plate (23) are divided from the lower end to the upper end by the Shimoyama folding line (25a), the Shimoya folding line (25b), the Nakayama folding line (25c), the Umitani folding line (25d) and A Ueyama folding line (25e) is inserted, and the side wall member (3) is provided with an Ueyama folding line (34) at the top,
The base plate (21) is superimposed and fixed on the upper surface of the bottom plate (11), the basic member (2) is attached to the upper frame (5) at the upper portions of the front plate (22) and the rear plate (23), A pair of side wall members (3) are attached to the upper frame (5) at upper portions of the side plates (31),
On both sides of the side plate (31) of the side wall member (3), a flexible holding piece (60) is attached so as to protrude from the central portion in the height direction. hook-and-loop fasteners (61a) are provided on the inner surface of the front plate (22) and the portion of the outer surface of the rear plate (23) sandwiching the Nakayama folding line (25c),
In the assembled state, the front plate (22) and the rear plate (23) stand upright without bending, and the pair of side plates (31) hangs down from the upper frame (5) to form the front plate (22) and the rear plate (23). ), and the overhanging portions of the holding pieces (60) are bent from both sides of the side plate (31) to sandwich the crease line (25c) of the outer surfaces of the front plate (22) and the rear plate (23). It is fixed with a hook-and-loop fastener (61a) on the
In the folded state, the pair of side plates (31) are folded inward about the upper folding line (34) to be flipped up, and the front plate (22) and the rear plate (23) are folded to the lower folding line (25a) and the lower valley. A collapsible container characterized by being foldable inward in a folding screen shape around a folding line (25b), a Nakayama folding line (25c), an Umitani folding line (25d), and an Ueyama folding line (25e). A base plate (1) having a bottom plate (11), a base member (2) in which a front plate (22) and a rear plate (23) are connected with a bottom plate (21) in between, and a pair of side plates (31). A collapsible container composed of a side wall member (3) and an upper frame (5) forming a rectangular frame,
In the basic member (2), the front plate (22) and the rear plate (23) are divided from the lower end to the upper end by the Shimoyama folding line (25a), the Shimoya folding line (25b), the Nakayama folding line (25c), the Umitani folding line (25d) and A Ueyama folding line (25e) is inserted, and the side wall member (3) is provided with an Ueyama folding line (34) at the top,
The base plate (21) is superimposed and fixed on the upper surface of the bottom plate (11), the basic member (2) is attached to the upper frame (5) at the upper portions of the front plate (22) and the rear plate (23), A pair of side wall members (3) are attached to the upper frame (5) at upper portions of the side plates (31),
On both sides of the side plate (31) of the side wall member (3), mounting pieces (36a) of the reinforcing member (36) having an L-shaped cross section are attached, and projecting pieces (36b) of the reinforcing member (36) are attached. A flexible holding piece (60) protrudes from the mounting piece (36a) at a right angle and is attached to the central portion in the height direction so as to protrude. Hook-and-loop fasteners (61a) are provided on (22) and the portion of the outer surface of the rear plate (23) sandwiching the Nakayama folding line (25c),
In the assembled state, the front plate (22) and the rear plate (23) stand upright without bending, and the pair of side plates (31) hangs down from the upper frame (5) to form the front plate (22) and the rear plate (23). ), and the protruding pieces (36b) of the reinforcing members (36) of the pair of side plates (31) are placed on the inner surfaces of the front plate (22) and the rear plate (23) along the bottom valley fold line (25b). The overhanging portions of the holding pieces (60) are bent from both sides of the side plate (31) along the upper valley fold line (25d) from below to form the central peaks of the outer surfaces of the front plate (22) and the rear plate (23). It is fixed with hook-and-loop fasteners (61a) to the part across the folding line (25c),
In the folded state, the pair of side plates (31) are folded inward about the upper folding line (34) to be flipped up, and the front plate (22) and the rear plate (23) are folded to the lower folding line (25a) and the lower valley. A collapsible container characterized by being foldable inward in a folding screen shape around a folding line (25b), a Nakayama folding line (25c), an Umitani folding line (25d), and an Ueyama folding line (25e).

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