JPH0140840Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a collapsible collapsible container used for transporting and conveying articles.

[Prior Art] The present applicant previously disclosed in Utility Application No. 177964/1987 that at least one of the side plates, bottom frame, and tilt plate constituting a folding container was attached to a frame made of synthetic resin. proposed a folding container that can reduce the weight of the container by caulking pins provided on the frame and fixing a synthetic resin corrugated board.

[Problems to be solved by the invention] However, in the case of the above-mentioned folding container, after resin-molding the respective frames and resin corrugated board according to the side plates, bottom frame and/or gate plate, These frames and the resin corrugated board must be fixed in a separate process, resulting in poor productivity and work efficiency.

[Means for Solving the Problems] The purpose of the present invention is to improve the above-mentioned folding container, and to provide a folding container in which the side plates, bottom frame and/or flap plates can be easily formed, and the productivity of the container is high. Our goal is to provide the following.

For this reason, the present invention includes an upper frame having a frame shape, a bottom frame having a shape corresponding to the upper frame, and an upper end rotatably supported with respect to the upper frame, and the container is assembled. a pair of opposing side plates whose lower ends are sometimes engaged with the bottom frame; the lower ends are rotatably supported with respect to the bottom frame; the lower ends are supported so as to be slidable in contact with the upper frame; A folding container comprising a pair of opposing gate plates that are engaged,
The bottom frame, side plates, and/or flap plates constitute a folding container by integrally resin-molding a synthetic resin corrugated board and a frame body.

[Operation of the invention] According to the invention, the upper end is rotatably supported by the upper frame, and the lower end is rotatably supported by the bottom frame and the pair of side plates that can be engaged with the bottom frame. , a container that can be folded with the top frame and bottom frame connected by a pair of gate plates that are slidably supported by a support member provided on the top frame and whose top ends can be engaged with the top frame. It consists of The side plates, bottom frame and/or gate plate are formed from each frame and a synthetic resin corrugated board, thereby making it possible to reduce the weight of the container. Furthermore, since these side plates, bottom frame and/or gate plate are formed by integrally resin-molding the frame body onto a synthetic resin corrugated board, these members can be obtained in one step. Therefore, the number of molding steps for each member constituting the container can be reduced and production efficiency can be improved.

[Example] Hereinafter, an example will be described according to an embodiment of the present invention.

The first diagram showing the outline of the folding container according to the present invention.
Figure 2 shows the support state of the upper frame and side plate.
Figure 3, which shows the cross section taken along the line A-A in Figure 1, Figure 4, which shows the cross section taken along the line B-B in Figure 1, and Figure 5, which shows the support state of the bottom frame and the tilting plate. In FIG. 6 showing the fixed state with the upper frame and FIG. 7 showing the fixed relationship between the side plate and the tilt plate, the upper frame 1 has a rectangular frame shape, and a rib 5 is provided on the inside of the opposing long frame 3. Each is integrally molded. Also, on the inside of the opposing short frame 7 is a tilt plate 59 which will be described later.
Engaging protrusions 9 with which the upper end is engaged are integrally molded at required intervals in the longitudinal direction of the short frame 7.
At each corner of the upper frame 1, a tilting plate support portion 11 is provided which supports the tilting plate 59 so as to be slidable in the vertical direction by the end face of the rib 5 and the inner surface of the short frame 7.

A rotation support portion 1 of the side plate 17 is provided on the lower surface of the rib 5.
3 are integrally molded at required intervals in the longitudinal direction, and a through hole 15 is bored in the rotation support part 13. A side plate 17 is rotatably supported by the rotary support portion 13. The side plate 17 is composed of a resin corrugated board 19 and a rectangular side plate frame 21 integrally molded with the resin corrugated board 19.
A pair of bearing parts 23 are integrally formed on the upper part of the side plate frame 21 so as to sandwich each rotation support part 13 therebetween, and a through hole 25 is bored in the bearing part 23 . The side plate 17 is rotatably supported by a first shaft pin 27 that is inserted into the through holes 15 and 25 in series. This first shaft pin 27 has an end portion in the axial direction formed into a tapered shape, and a locking stepped portion 27.
A is rotated. Further, a locking protrusion 29 is integrally formed on one of the bearing parts 23, and the through hole 15
and when the first shaft pin 27 is inserted into the through hole 25,
The locking protrusion 29 and the locking step 27a are engaged.

A receiving protrusion 31 is integrally formed on both sides of the outer surface of the side plate frame 21 near the fan plate 59, and the receiving protrusion 31
receives the lower end surface of the upper frame 1 when assembling the container. Support recesses 33 extending in the horizontal direction are integrally formed at both ends of the side plate frame 21, and the support recesses 33 are formed on the side plate 5 when the container is assembled.
A support protrusion 77 provided at 9 is engaged. Further, an engagement hole 35 is formed in the center portion of both sides of the side plate frame 21 slightly below the support recess 33.
5 is engaged with an engagement piece 79 provided on the tilting plate 59 when assembling the container. In addition, side plate frame 2
A locking hole 37 is formed at the lower end of the container 1, and an engaging protrusion 51 provided on the bottom frame 41 is inserted into the locking hole 37 when the container is assembled. A tongue piece 39 is integrally formed between the locking holes 37, and the tongue piece 39 is formed into an elastically deformable U-shape. During assembly of the container, the tongue piece 39 is elastically deformed as it passes through a protrusion 53 provided on a bottom frame 41, which will be described later. It is restored to its shape and its free end is engaged with the protrusion 53.

The bottom frame 41 has a shape substantially corresponding to the top frame 1, and includes a resin corrugated board 43 and a bottom frame frame 45 integrally molded with the resin corrugated board 43.
It is composed of. and the bottom frame 41
Each of the long frames 47 is formed with a tapered surface 49 whose height gradually increases from the inside to the outside, and an engaging protrusion 51 is integrally formed in correspondence with the locking hole 37. Further, a protrusion 5 is provided on the upper surface of the bottom frame 41.
3 is molded to correspond to the tongue piece 39. Each short frame 55 of the bottom frame 41 is provided with a stud 57.
are integrally erected, and the studs 57 are inserted into the tilt plate support portion 11 when the container is folded.

Rotation support portions 61 of the tilting plate 59 are integrally molded on the stud 57 at required intervals in the longitudinal direction, and the rotation support portion 61 has through holes 63.
is drilled.

A tilt plate 59 is rotatably supported by the rotary support portion 61 . The tilt plate 59 is composed of a resin corrugated board 65 and a tilt plate frame 67 integrally molded with the resin corrugated board 65. A pair of bearings 69 are provided at the lower end of the tilt plate frame 67 at each rotation support portion. They are integrally molded so as to sandwich 61. Further, a through hole 71 is bored in the bearing portion 69, and a second shaft pin 73 is inserted through the through hole 63 and the through hole 71. The second shaft pin 73 is formed into a tapered shape at one end in the axial direction and has a stepped portion 73 at the end.
A is rotated. A locking protrusion 77 is integrally molded in one of the bearing parts 69, and when the second shaft pin 73 is inserted into the through hole 63 and the through hole 71, the locking protrusion 77 is inserted into the stepped portion 73a. is engaged with.
Two support protrusions 77 extending horizontally are formed on both sides of the tilting plate 67 to correspond to the support recesses 33, and engagement pieces 79 are formed in the engagement holes 3.
It is integrally molded in accordance with 5. Furthermore, an engagement hole 81 is formed in the upper part of the tilt plate frame 67 in correspondence with the engagement protrusion 9 . Further, support portions 83 are integrally formed on both sides of the upper end of the tilt plate frame 67, and the support portions 83 receive and support the lower surface of the bottom frame 41 of the upper container when the containers are stacked.

In addition, the upper frame 1, the rotation support part 13, the first
The shaft pin 27, the bottom frame 41, the tilt plate 59, and the second shaft pin 73 are each molded from a single resin having excellent impact resistance, weather resistance, and bending stress characteristics, such as polypropylene resin.

Next, the side plate 17, the bottom frame 41 and the tilt plate 5
The molding method of No. 9 will be explained with reference to FIG. still,
Although FIG. 8 shows the molded state of the side plate 17, the molded states of the bottom frame 41 and the gate plate 59 are also the same, and therefore the description thereof will be omitted.

A fixed mold 91 attached to a fixed side mold plate (not shown) is formed into a shape corresponding to the outer surface of the side plate 21 constituting the side plate 17, and has a corner 9 at the four circumferential corners.
3 are integrally formed. Further, a movable mold 95 attached to a movable side template (not shown) is formed in a shape corresponding to the inner surface of the side plate frame 21. After setting the resin corrugated board 19 in the fixed mold 91 with the four circumferences of the resin corrugated board 19 corresponding to the gaps 93, the fixed mold 91 and the movable mold 95 are clamped. Ru. In this state, the resin corrugated board 93 to which the wall 93 is pressed is deformed into a concave shape. When the resin is injected into the cavity through the sprue 97 and the gate, the resin is injected to the four circumferential parts of the resin corrugated board 19 while being restricted from flowing into the inside of the resin corrugated board 19 by the aforesaid pipe 93. This allows the side plate 1
The resin corrugated board 19 and the side plate frame 21 constituting the housing 7 are integrally injection molded. In addition, since the resin flows into the space of the resin corrugated board 19 located on the four circumferential side, the resin corrugated board 19 and the side plate frame 21 are firmly integrated. After the above operation, the fixed mold 91 and the movable mold 95 are opened, and then the side plate 17 integrally molded with resin is released by the operation of an ejector pin (not shown).

A method of assembling and folding the container configured as described above will be explained with reference to FIG. 1 and FIGS. 9 to 11.

First, to explain how to assemble the container, as shown in FIGS. 1 and 9, each tilt plate 59 is rotated upward (in the direction of the solid line arrow shown in FIG. 9) about the second shaft pin 73, and the The board 59 is erected.
Next, after lifting the upper frame 1 upward with respect to the bottom frame 41 and releasing the fitted state of the studs 57 to the tilting plate support portion 11, while sliding the tilting plate 59 into contact with the tilting plate support portion 11, Lift the upper frame 1 further upward. As a result, the engagement hole 81 provided in the tilting plate 59 is engaged with the engaging protrusion 9 provided on the inner surface of the short frame 7 of the upper frame 1, and the upper part of the tilting plate 59 is moved by the tilting plate support portion 11. Supported.

Next, in the above state, when the side plate 17 is rotated downward (in the direction of the solid line arrow shown in FIG. 9) about the first shaft pin 27 to hang the side plate 17, the lower end surface of the side plate 17 is tapered. After being rotated toward the long frame 47 while slidingly contacting the surface 49, the locking hole 37 and the engaging protrusion 51 are engaged. At this time, as the lower end of the side plate 17 comes into sliding contact with the tapered surface 49, the upper frame 1
is slightly lifted, so that the engaging state of the engaging protrusion 9 with respect to the engaging hole 81 is firmly maintained. Also,
The tongue piece 39 is elastically deformed as it comes into sliding contact with the protrusion 53 , and after riding over the tongue 53 , it is restored to its substantially original shape by its elastic force, and its free end abuts against the protrusion 53 . engage. As a result, the lower end of the side plate 17 is fixed to the bottom frame 41. In particular, since the free end of the tongue piece 39 is abutted and engaged with the protrusion 53, even if an external force is applied to the side plate 17 from the outside, rotation of the side plate 17 is effectively restricted, and the container is The assembled state is firmly maintained. Furthermore, as the side plate 17 droops, the side plate frame 2
A tilting plate frame 67 is placed within the support recess 33 provided in 1.
The support protrusion 77 provided in the engagement hole 35 is engaged, and the engagement piece 79 is engaged in the engagement hole 35. As a result, the side plate 17 and the tilting plate 59 are fixed. In particular, since the support recesses 33 and the support protrusions 77 of the side plates 17 and the tilting plates 59 are engaged with each other, when the load of stacked containers acts on the upper frame 1, the load is transferred to the upper frame 1. It is possible to securely maintain the assembled state of the container by receiving the containers at adjacent locations to restrict bending of the side plates 17 and the flap plates 59. Furthermore, as the side plate 17 droops, the receiving protrusion 31 is engaged with the lower end surface of the upper frame 1, so that the receiving protrusion 31 is in a downward direction that acts on the upper frame 1 when the containers are stacked. This increases the strength of the container.

Containers assembled as described above are normally used to store necessary items and to be stacked. At this time, the next container stacked upward has a support portion 83 whose bottom surface slightly protrudes from the top surface of the rib 5.
Therefore, the volume of the container can be increased compared to a conventional container which receives the bottom surface of the container by the ribs 5.

Next, in FIGS. 9 to 11, in order to fold the container assembled as described above, the side plate 17 is first folded in the direction of the dashed arrow shown in FIG. 9 in the reverse order of the assembly method described above. After that, the engagement state between the engagement protrusion 9 and the engagement hole 81 is released, and the upper frame 1 is pushed down. As a result, the stud 57 is fitted into the tilting plate support portion 11, and the upper frame 1 and the bottom frame 41 are integrated. Next, the tilt plate 59 is folded in the direction of the dashed arrow shown in FIG. 9, and the tilt plate 59 is housed above the rib 5. (See FIGS. 10 and 11) As described above, this embodiment has a side plate 17 whose upper end is rotatably supported and whose lower end engages with the bottom frame 41, and whose lower end is rotatably supported by the stud 57. The container can be folded while the top frame 1 and the bottom frame 41 are connected by a tilting plate 59 that is supported so as to be slidably connected to the rib 5 and whose upper end engages with the top frame 1. I have to. The side plates 17, bottom frame 41, and gate plates 59 that constitute the container are each resin corrugated board 19,
43, 65, side plate frame 21, bottom frame frame 45
Since the side plates 17, the bottom frame 41, and the tilt plate frame 67 are formed by insert molding, the number of manufacturing steps for the side plates 17, the bottom frame 41, and the tilt plate 59 can be reduced and production efficiency can be improved. In addition, these side plates 1
7. Since the bottom frame 41 and the gate plate 59 are mostly formed of the resin corrugated boards 19, 43, and 65, the weight of the container can be reduced.

[Effects of the invention] As described above, the present invention has a side plate, a bottom frame and/or
Alternatively, it is possible to easily form the flap plate and provide a folding container with high container productivity.

[Brief explanation of drawings]

FIG. 1 is a perspective view schematically showing a folding container;
Fig. 2 is a cross-sectional view showing the support state of the upper frame and side plate, Fig. 3 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 4 is a cross-sectional view taken along line B-B in Fig. 1. 5 is a cross-sectional view showing how the bottom frame and the tilting plate are supported, FIG. 6 is a perspective view showing how the tilting plate and the upper frame are fixed, and Figure 7 is how the side plate and the tilting plate are fixed. FIG. 8 is an explanatory diagram showing the formed state of the side plate, and FIGS. 9 to 11 are explanatory diagrams showing the operation. In the figure, 1 is the upper frame, 17 is the side plate, 19 is the resin cardboard board, 21 is the side plate frame, 41 is the bottom frame,
43 is a resin cardboard board, 45 is a bottom frame frame, 5
Reference numeral 9 denotes a tilting board, 65 a resin corrugated board, and 67 a tilting board frame.

Claims (1)

[Claims for Utility Model Registration] An upper frame having a frame shape, a bottom frame having a shape corresponding to the upper frame and having a bottom, an upper end of which is rotatably supported relative to the upper frame, and a container. a pair of opposing side plates whose lower ends are engaged with the bottom frame during assembly; the lower ends are rotatably supported with respect to the bottom frame; A folding container equipped with a pair of opposing flap plates that are engaged with the frame, characterized in that the bottom frame, side plates and/or flap plates are integrally resin-molded from a synthetic resin corrugated board and the frame body. folding container.