JPH0338841B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a rectangular collapsible side frame structure used in a sectional box that can be used as furniture or as a part of furniture. It is something.

(Prior art and its problems) This type of conventional prefabricated box has a back plate, a top plate,
A total of five plates, the bottom plate and left and right side plates, are separated, and the four plates other than the back plate must be joined at right angles to each other using the provided connecting means to form a rectangular side frame. Therefore, the assembly work cannot be easily performed.

Although it is possible to connect the four boards forming the side frame with hinges in advance so that they can be folded at their adjacent edges, it is better to use boards that are thick enough to be used as furniture. There was no practical method available for furniture that could be done, and that would completely hide the hinges when unfolded into a rectangular shape.

(Means for Solving the Problems) The present invention proposes a side frame structure for a prefabricated box that can solve the conventional problems as described above. , and the bottom plate is brought into a flat state in which the top plate overlaps one side plate and the bottom plate overlaps the other side plate via a hinge between adjacent edge parts and having a bending shaft parallel to these edges. The hinges are pivotably connected in a foldable manner, and one of the two shaft rods pivotally connected by the bending support shaft is connected to one of the two plates connected by the hinge. The other shaft is attached to the other plate so as to be movable in and out with respect to the end face thereof, and the other plate is attached to the other plate when both plates are opened at right angles from the folded state. With the other plate being moved relative to the other shaft rod from The reason is that it has a built-in means for tightening the shaft rod.

(Function) According to such a configuration, the side frame before assembly can be folded into a flat state using each hinge so that the top plate overlaps one side plate and the bottom plate overlaps the other side plate. When assembling the side frame into a rectangular shape, the two plates connected by hinges are opened to the right angle position to unfold the four plates into a rectangular frame shape, but in this state it is possible to fold between the adjacent plates. A space exists for leveling, and two shaft rods including the bending support shaft of the hinge protrude within the space.

From this state, by moving the other plate relative to the shaft of the hinge until the end surface of the other plate and the inner surface of one of the two adjacent plates come into contact with each other, the two plates are removed. As the space between the boards disappears, the hinge becomes hidden. Further, by operating the shaft rod tightening means to tighten the shaft rod of the hinge, the two adjacent plates are firmly connected in a perpendicular state.

The back plate may be attached to the side frame assembled as described above by an appropriate method, if necessary.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a foldable side frame, which is composed of left and right side plates 2, 3, a top plate 4, and a bottom plate 5, and the rear edge of each of these plates 2 to 5. A groove 7 into which the back plate 6 is fitted is formed on the adjacent inner surface. Four plates 2 to 5 forming the side frame 1
is the front and back (board width direction) 2 at the adjacent edge part.
The parts are pivotally connected by a hinge 8.

Each hinge 8 fixes two shaft rods 10a, 10b, one shaft rod 10a, which are pivotally connected to be bendable by a bending support shaft 9, as shown in FIGS. 7 to 10. The shaft fixture 11 and the other shaft rod 10b
It consists of a rotating cam 12 that engages with the rotary cam 12. The shaft fixing device 11 is composed of a flat plate having a recess 11a at one end that fits into a parallel bar 13 formed on both sides near the free end of the shaft rod 10a. The other shaft rod 10b has a bulged head 14 and an intermediate small diameter shaft portion 15.
is formed.

The rotating cam 12 has a peripheral wall 12a and a circular top plate 1.
2b, and the shaft rod 10b is located at one location around the periphery.
A notch recess 16 is provided in which the bulging head 14 of the rotary cam 12 is loosely fitted in the axial direction of the rotary cam 12, and the peripheral wall 12a has a wide engagement groove 17 extending in one circumferential direction from the notch recess 16. A narrow engagement groove 18 extending circumferentially from the terminal end of the groove 17 is provided. The wide engagement groove 17 has a width that allows the shaft rod 10b to pass through, and the narrow engagement groove 18 has a width that allows the intermediate small diameter neck portion 15 of the shaft rod 10b to pass through. Further, the thickness of the peripheral wall 12a at the portion where the narrow engagement groove 18 is formed is gradually increased so that it becomes thicker toward the terminal end of the engagement groove 18, so that the inner peripheral surface of the peripheral wall 12a becomes a cam surface for tightening the shaft rod. It is formed at 19.
Reference numeral 20 denotes a rotation operation groove formed in the circular top plate 12b.

The hinge 8 described above is attached as follows.
That is, as shown in FIG. 10, the bending support shaft 9 is inserted into the free end of the shaft 10a into the shaft fitting hole 21 which is opened on the inner surface near the edge of the side plates 2, 3. The shaft rod fitting hole 21 is fitted in a direction parallel to the edge of the side plates 2 and 3, and is open to the end surface of the side plates 2 and 3.
The shaft rod fixing device fitting hole 2 is drilled perpendicularly to the
2, and the concave portion 11a of the shaft rod fixture 11 is fitted into the parallel bar 13 of the shaft rod 10a, thereby fixing the shaft rod 10a so that it does not come off. still,
The shaft fixing tool 11 is attached to the side plate 2 by adhesive, screws, etc.
Stick to 3.

The shaft rods 10b protruding from the inner surfaces near the edges of the side plates 2 and 3 are inserted into shaft rod through holes 23 that are opened in the end surfaces of the top plate 4 and the bottom plate 5. The rotary cam 12 is inserted into the rotary cam fitting hole 24 formed to communicate with the inner end of the rotary cam fitting hole 24 and open to the inner surfaces of the top plate 4 and the bottom plate 5, and the rotary cam fitting hole 24 is inserted from the shaft rod through hole 23 into the rotary cam fitting hole 24. The bulging head 14 of the shaft rod 10b protruding inwardly fits loosely into the notch recess 16, and the circular top plate 12b is fitted so as to be substantially flush with the inner surfaces of the top plate 4 and the bottom plate 5. Then, the rotary cam 12 is rotated by a tool or the like fitted into the rotation operation groove 20 in the direction in which the wide engagement groove 17 fits into the shaft rod 10b, so that the wide engagement groove 12 is rotated as shown in FIG. 17 and the shaft rod 10b are brought into contact. As a result, the rotating cam 12 is inserted into the rotating cam fitting hole 2.
The shaft rod 10b prevents the shaft from coming out of the shaft 1.
The rotary cam 12 prevents the shaft 0b from coming out of the shaft rod through hole 23.

By attaching the hinges 8 as described above, the inner surfaces near the edges of the side plates 2 and 3 and the end surfaces of the top plate 4 and the bottom plate 5 are connected by two hinges 8 each, thereby forming the side frame 1. However, at this time, as shown in FIGS. 4, 5, and 7, the shaft rods 10a, 10b of each hinge 8 are connected to the inner surfaces near the edges of the side plates 2, 3 and the end surfaces of the top plate 4 and bottom plate 5. As shown in FIG. Makes folding possible.

When assembling the side frame 1, refer to Figures 1 and 4.
The side frame 1 is folded into a flat shape as shown in the figure.
around the bending support shaft 9 of each hinge 8.
Open and move the top plate 4 and bottom plate 5 to the right angle position,
It is expanded into a rectangular frame shape as shown in FIG. In this unfolded state, as shown in FIG. 2, FIG. 5, and FIG.
A space remains between the side plate 5 and the end face of the side plate 5 in which the bent portion of the shaft rod of the hinge 8 is exposed, and the distance between the side plates 2 and 3 is widened.

In such a state, the top and bottom edges of the back plate 6 are connected to the top plate 4.
Then, the back plate 6 is fitted into the back plate fitting groove 7 of the bottom plate 5 by a method such as curving the back plate 6 or deepening the back plate fitting groove 7 on the top plate 4 side.

Next, when both sides plates 2 and 3 are pressed inward, the top plate 4 and bottom plate 5 and both side plates . I can do it. At this time, the left and right edges of the back plate 6 can be fitted into the back plate fitting grooves 7 of the left and right side plates 2 and 3. At this time, the rotary cam 12 of each hinge 8 moves closer to the shaft rod 10b, and as shown in FIG. They are in an adjacent state. In such a state, the rotating cam 12 of each hinge 8,
The narrow engagement groove 18 is located at the intermediate small diameter neck portion 15 of the shaft rod 10b.
As shown in FIG. 9, the intermediate small diameter neck 15 of the shaft rod 10b and the rotating cam 12 engage with the rod tightening cam surface 19, and the shaft rod 10b engages with the rotating cam. It is tightened inward with the rotation of 12. That is, the end surfaces of the top plate 4 and the bottom plate 5 are fixed to the inner surfaces near the edges of the side plates 2 and 3 by pressure.

Although the box consisting of the rectangular frame-shaped side frame 1 and the back plate 6 is assembled as described above, it is also possible to disassemble it by performing the reverse procedure of this assembly operation. or,
If disassembly is not necessary, the back plate 6 may be fixed to the side frame 1 using fixing means such as nails or screws.

Although the rotary cam 12 was used as the shaft rod tightening means in the above embodiment, other suitable structures such as a linearly moving wedge type tightening means may also be used. Further, in the embodiment, the structure is such that the top plate 4 and the bottom plate 5 are sandwiched between the side plates 2 and 3, but the structure can be reversed.

(Effects of the Invention) As described above, according to the side frame structure of the present invention, although the top plate, the bottom plate, and the left and right side plates are all pivotally connected with hinges in advance, in the state before assembly, the The four plates can be folded into a completely flat shape. Therefore, the folded state is very compact, and packaging, storage, and transportation can all be carried out easily and economically.

Although it is easy to assemble, it can be effectively used as furniture because the adjacent boards can be tightly fixed together and the hinges can be completely hidden when assembly is complete. .

[Brief explanation of drawings]

Figures 1 to 3 are perspective views showing the assembly order, Figures 4 to 6 are front views showing the main parts at that time, and Figures 7 to 9 are transverse plan views showing changes in the state of the hinge. , FIG. 10 is an exploded perspective view of the hinge portion. 1... Side frame, 2, 3... Left and right side plates, 4... Top plate, 5... Bottom plate, 6... Back plate, 7... Back plate fitting groove, 8... Hinge, 9... Folding Curved support shaft, 10a,
10b...Shaft rod, 11...Shaft rod fixing tool, 12...
Rotating cam (shaft rod tightening means), 14... bulging head, 15... middle small diameter neck, 16... notch recess, 17... wide engagement groove, 18... narrow engagement groove,
19...Cam surface for tightening the shaft rod, 21...Shaft rod fitting hole, 22...Shaft rod fixture fitting hole, 23...Shaft rod through hole, 24...Rotary cam fitting hole.

Claims (1)

[Claims] 1. The left and right side plates, top plate, and bottom plate are connected via a hinge between the adjacent edges with a bending axis parallel to these edges, so that the top plate overlaps one side plate and the bottom plate overlaps the other. The hinges are pivotally connected so that they can be folded into a flat state overlapping the side plates of the frame, and each of the hinges includes one of the two shaft rods pivotally connected by the bending support shaft. Among the plates, one of the plates is fixedly protruded from the inner surface, and the other shaft is attached to the other plate so as to be movable in and out of the end surface of the other plate, and the other plate is provided with a shaft that can be used to fold the two plates. In the state in which the other plate is moved relative to the other shaft rod from the state opened at right angles until the end surface of the other plate and the inner surface of the one plate abut each other, A side frame structure of a prefabricated box that includes an internal shaft tightening means for tightening the other shaft inward.