JPH0257552A - Corner connecting piece for assembly type box - Google Patents

Abstract

PURPOSE:To utilize the function of a plastic material effectively without employing separate parts, increase the productivity and durability and perform the assembly and disassembly works quickly by providing respective specific flat plate shaped first and second connecting pieces made of a plastic material. CONSTITUTION:Under a condition where a first and second connecting pieces 20, 30 are connected to respective adjoining edge parts of adjacent side panels 40, 45, respective side panels 40, 45 are made to erect, and an insertion piece 24 of the connecting piece 20 is fitted in a guide groove 32 of the connecting piece 30. As a result, an opening end 26a of an engaging piece 26 is pressed to move inward by the inner surface of an outer wall 31b of the guide groove 32. A hook 34a moves inward by a cam 26b through an elasticity piece 34 and confronts with a hook hole 23. When the insertion piece 24 is fitted most deeply in the guide groove 32, the engaging piece 26 performs an elasticity-return and is fitted to engage in an engaging hole 36. The cam 26b retreats, and the hook 34a is fitted in the hook hole 23 and engages with an engaging claw 23a. Also, in a fitting hole 22 of the connecting tool 20, a fitting protrusion 35 of the connecting tool 30 is fitted.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an assembly type box in which a rectangular parallelepiped or cubic box is formed by vertically bending each circumferential portion of the main body, that is, the side plate, which is expanded into a flat plate shape. In particular, it relates to a corner connector for a prefabricated box that detachably connects opposing edges of adjacent side plates.

(Prior Art) As a conventional technology, there is a structure shown in FIG. 14.

That is, a first connector A and a second connector B formed of a plastic material are attached with rivets 4 to opposing edges of adjacent side plates 2 and 3 that are bent upward and stand up from each edge of the bottom plate 1.・
5 to be integrally connected.

The first connector A has a hook piece 7 formed by bending the right end (outer end) of the main body 6 in the inner direction (in the direction of the side plate 3),
An engaging body 8 is attached to the inner surface of the main body 6 so as to be movable toward the hook 7.

This engaging body 8 is connected by a pin 10 to an operating piece 9 arranged on the outer surface of the main body 6, and the part of the main body 6 through which this pin 10 penetrates
A long hole 11 extending in the left-right direction is formed in the main body 6 so that it can be moved left and right with respect to the main body 6 together with the operation piece 9. Further, the right end of the engaging body 8, that is, the end facing the hook piece 7, is inclined outward to form a slope 8a.

The engaging body 8 is biased rightward by a spring 12 whose left end is engaged with the main body 6 and whose right end is engaged with the engaging body 8.

In addition, a connecting piece 13 formed with a small width at the left end of the main body 6
are integrally formed, and this connecting piece 13 is integrally connected to the opposing edge of the side plate 2 with a rivet 4.

Next, the above-mentioned second connector B has a thin hook piece 15 integrally formed at one end (outer end) and whose tip is bent inward, and has a small width at the other end (outer end). A connecting piece 13 is integrally formed, and this connecting piece 13 is integrally connected to the opposing twill portion of the side plate 3 with a rivet 5.

When assembling the box, first, the side plate 3 is erected, and then the side plate 2 is erected, and the hook piece 7 of the first connector A is pressed toward the hook piece 15 of the first connector B.

Then, the slope 8a of the engaging body 8 is pushed by the tip of the hook 15 and moves to the left, and when the slope 8a passes the hook 15, it returns to the right due to the reaction force of the spring 12. When the hook 7 of the first connector A surrounds the outer surface of the hook 15 of the first connector B, as shown in FIG. The inner and outer surfaces of the piece 15 are held between the engaging body 8 and the hook piece 7 to connect the adjacent side plates 2 and 3.

When disassembling one box, push the operation piece 9 to the left in FIG. The hook piece 7 of the connector A is separated from the hook piece 15 of the second connector B.

(Problems to be Solved by the Invention) In the conventional device described above, the first connector A was formed by assembling the main body 6, the engaging body 8, the operating piece 9, and the spring 12, which were each formed separately. This has the disadvantage that the number of parts increases and assembly is labor-intensive.

In addition, the spring 12 is susceptible to rust and deterioration, and if it is stored with salty seaweed or fish or exposed to rainwater,
There was a drawback that assembly and deployment could not be carried out smoothly.

SUMMARY OF THE INVENTION The object of the present invention is to provide a new corner connector for an assembly bin that eliminates the above-mentioned drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows.

That is, a flat plate-shaped first connector and a second connector are provided using a plastic material, and the first connector has a fitting hole extending from the inner surface to the outer surface at one end thereof, and a fitting hole extending from the inner surface to the outer surface. A casting hole bent in one end direction, a tongue-shaped insertion piece protruding outward from the one end where the casting hole is located and bent in the thickness direction at its connecting base, and at the other end, A connecting part is formed to be connected to the opposing edge of one of the opposing side plates, and the second connector has a fitting at one end that projects outward and removably fits into the fitting hole. a mating protrusion, a hook piece that protrudes outward, bends toward the outer surface, and is displaced in the thickness direction to removably fit into the casting hole; and a hook piece that slides the insertion piece from one end toward the other end. A guide groove that is movably fitted, and a connecting part connected to the other side of the side plate of the box are formed at the other end of the second connector, and the insertion piece and the wall of the guide groove are connected to each other. A locking piece that protrudes outward and can be displaced inwardly is formed on one side, and a locking hole is formed on the other side, into which the locking piece fits and locks from the inside when the insertion piece and the guide groove are inserted into the deepest position. It is structured as follows.

(Function) Since the present invention has the above configuration, the first connector is connected to one adjacent side plate at the connecting portion, and the second
The connector is connected to the other adjacent side plate at its connecting portion, and in this state, each side plate is erected, and the insertion piece of the first connector is fitted into the guide groove of the second connector.

In this case, when the insertion piece is inserted into the guide groove the deepest, that is, when the ends (outside ends) of the first and second connectors approach each other, the locking piece is inserted into the locking hole until the thickness Fit and lock from the direction (lateral direction).

At the same time, the fitting protrusion and hook piece of the second connector are fitted and locked into the fitting hole and casting hole of the first connector.

As a result, the rotation of one side plate to which the first connector is connected is mainly prevented by the engagement between the locking piece and the locking hole and the engagement between the casting hole and the hook piece, and Rotation of the other side plate to which the tool is connected is mainly prevented by engagement between the fitting hole and the fitting protrusion.

In this state, when the locking piece is pressed from the outer surface toward the inner surface, the locking piece is released from the locking hole and the hook piece is removed from the casting hole, and the connection between the adjacent side plates is released. That will happen.

(Example) Embodiments of the present invention will be described below based on the drawings.

In the drawings, FIG. 1 is a front view showing a first connector showing an embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views along ■-■ and ■-■, and FIG. 4 is a front view showing a first connector according to an embodiment of the present invention. FIG. 5 and FIG. 6 are cross-sectional views along ■-■ and VI-VIX. FIG. 7 is a partial cross-sectional front view of the side plate to which the first connector is connected, and FIG. 8 is a cross-sectional view along ■Cross-sectional view, Figure 9 is a partially sectional front view of the side plate to which the second connector is connected, and Figure 10 is its x-
11 is a developed plan view of the box with the first and second connectors attached to the side plates, and FIGS. 12 and 13 are the assembled boxes. It is a sectional view corresponding to x■ and xm-xm.

In FIGS. 1 to 3, reference numeral 20 denotes a first flat plate integrally formed of a plastic material such as polypropylene.
This first connector 20 has a fitting hole 22 at the lower left end of the main body 21 and a casting hole 2 at the upper left end of the main body 21.
form 3.

The fitting hole 22 is elongated in the vertical direction and is recessed in a straight line from the inner surface 21a toward the outer surface 21b, and the casting hole 23 is elongated in the vertical direction and is located inside the outer surface 21b side with respect to the entrance on the inner surface 2ia side. By widening the opening to the left, an engaging claw 23a is formed at the entrance.

At the left end of the outer surface 21b side of the main body 21 where the casting hole 23 is located, a thin tongue-shaped insertion piece 24 is formed to protrude leftward, and its connection base 24a is locally formed thin. The insertion piece 24 can be bent inward with respect to the main body 21 around the connection base 24a.

A semicircular plate-shaped locking piece 26 is formed in the center of the insertion piece 24 and is open on the connecting base 24a side by an arcuate slit 25 that curves from the left to the right.

As shown in FIG. 2, this locking piece 26 has an open end 26a protruding outward from the insertion piece 24, and has an inner surface of this open end 26a extending inwardly and to the left. A protruding cam 26b is integrally formed.

Further, connecting protrusions 27 and 28 protruding rightward and downward are formed at the upper right end and lower left end of the main body 21, and a fitting groove 29 is formed at the corner where the two intersect. The connecting protrusions 27 and 28 and the fitting groove 29 form a connecting portion that is connected to one opposing edge of the rear side plate.

In FIGS. 4 to 6, 30 is the aforementioned first connector 2.
This second connector 30 is a flat plate-shaped second connector integrally formed from the same material as 0, and this second connector 30 forms a guide groove 32 in the interior of the main body 31 that is rectangular in front view and has an open right end.

This guide groove 32 is formed to have an area and width that allow the aforementioned insertion piece 24 to fit loosely therein.

An elastic piece 34 divided by a pair of upper and lower slits 33 extending from the right end toward the left is formed in the vertically intermediate portion of the inner wall 31a of the main body 31 forming the guide groove 32. At the right end of this elastic piece 34, as shown in FIGS. 4 and 5, a hook piece 34a is integrally formed, which projects outward to the right from the right end of the main body 31 and bends toward the outer surface of the main body 31. .

The hook piece 34a is made to correspond to the casting hole 23 of the first connector 20 described above, and is formed in a size that allows it to be removably fitted into the casting hole 23.

Further, as shown in FIGS. 4 and 6, a fitting protrusion 35 is formed on the inner surface of the main body 31 located below the hook 34a so as to protrude toward the right.

This fitting protrusion 35 corresponds to the fitting hole 22 of the first connector 20 described above, and is formed in a size that allows it to be removably fitted into the fitting hole 22.

Further, as shown in FIGS. 4 and 5, a circular locking hole 36 is formed in the center of the outer wall 31b of the main body 31 forming the guide groove 32 described above.

This locking hole 36 is formed in a position and size such that when the insertion piece 24 of the first connector 20 is fitted into the guide groove 32 most deeply, the locking piece 26 is fitted from the inner side.

Further, connecting protrusions 37 and 38 protruding leftward and downward are formed at the upper left end and lower right end of the main body 31, and a fitting groove 39 is formed at the corner where both intersect. The connecting protrusions 37 and 38 and the fitting groove 39 form a connecting portion that is connected to the other opposing edge of the rear side plate.

7 and 8 show the structure of the opposing edges of the side panels of the box to which the first connector 20 is connected.

That is, 40 is one side plate adjacent to each other, and reinforcing frames 41 and 42 bent in a U-shape are fitted into the opposing edge 40a and the outer edge 4°b of the side plate 40. As shown in FIG. 8, it is fixed with rivets 43.

The side plate 40 has an opposing edge 40a and an outer edge 4.
The outer peripheral corner of 0b is removed in an L-shape to form a fitting edge 40c that fits into the fitting groove 29 of the first connector 20, and the ends of the reinforcing frames 41 and 42 corresponding to this part are are cut in the middle to form fitting recesses 41a and 42a into which the connecting protrusions 27 and 28 of the first connecting tool 20 fit.

Moreover, FIGS. 9 and 10 show the structure of the opposing edges of the side plates of the box to which the second connector 30 is connected.

That is, 45 is the other adjacent side plate, and reinforcing frames 46 and 47 similar to those described above are fitted to the opposing edge 45a and outer edge 45b of this side plate 45, as shown in FIG. It is fixed with rivets 48 as shown in FIG.

The side plate 45 has an opposing edge 45a and an outer edge 4.
5b is removed stepwise to form a fitting edge 45c that fits into the fitting groove 39 of the second connector 30,
The ends of the reinforcing frames 46, 47 corresponding to these portions are cut halfway to form fitting recesses 46a, 47a into which the connecting protrusions 37, 38 of the second connecting tool 30 fit.

Then, the fitting groove 29 and the connecting protrusions 28 and 27 of the first connecting tool 20 are fitted into the fitting edge 40c and the fitting recesses 41a and 42a of one side plate 40, as shown in FIG. The connecting protrusions 28 and 27 and the reinforcing frames 41 and 42 are integrally fixed by rivets 43a and 43b, and the fitting edge 45c and fitting recesses 45a and 46a of the other side plate 45 are fixed together.
, the fitting groove 39 and the connecting protrusion 38 of the second connector 30.
37, and as shown in FIG.
・Rivet 37 and reinforcing frames 46 and 47 with rivets 48a and 48b
It is fixed integrally.

Next, the operation mode of the above embodiment will be explained.

As shown in FIG. 11, the first connector 20 and the second connector 3o are connected to opposing edges of one side plate 4o and the other side plate 45, and each side plate 40, 45 is erected. At the same time, the insertion piece 24 of the first connector 20 is fitted into the guide groove 32 of the second connector 3o.

In this case, as the insertion piece 24 is fitted into the guide groove 32, the open end 26a of the locking piece 26 is pressed inward by the inner surface of the outer wall 31b of the guide groove 32, and the open end 26a is moved inward. , the hook piece 34a gradually moves inward through the elastic piece 34 by the cam 26b formed on the inner surface of the open end 26a, and comes to face the hook hole 23.

When the insertion piece 24 is inserted into the guide groove 32 most deeply and the locking piece 26 faces the locking hole 36, the locking piece 26 elastically returns to the locking hole 36 as shown in FIG. At the same time, the cam 26b is retracted and the elastic piece 34 returns to the outer surface, so that the hook piece 34a fits into the hook hole 23 and engages with the engaging claw 23a. Become.

Furthermore, when the side plates 40 and 45 are erected, the fitting protrusion 35 of the second coupling tool 30 fits into the fitting hole 22 of the first coupling tool 20, as shown in FIG.

As a result, one side plate 4 to which the first connector 20 is connected
0 rotation is mainly prevented by the engagement between the locking piece 26 and the locking hole 36 and the engagement between the hook hole 23 and the hook piece 34a,
Moreover, the rotation of the other side plate 45 to which the second connector 30 is connected is mainly prevented by the engagement between the fitting hole 22 and the fitting protrusion 35.

In this state, when the locking piece 26 is pressed from the outer surface toward the inner side, the locking piece 26 is released from the locking hole 36, and the hook piece 34a is separated from the hook hole 23 via the cam 26b. The connection between the adjacent side plates 40 and 45 is released.

(Effects of the Invention) As is clear from the above description, according to the present invention, the functions of plastic materials are effectively utilized and the use of separate parts is eliminated, so productivity and durability are high, and assembly and This has the effect that the disassembly operation can be carried out quickly.

Further, since the rotation of each side plate is prevented by using the compressive force and tension of the plastic material, the rigidity at the time of one assembly is increased.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a first connector showing an embodiment of the present invention, FIGS. 2 and 3 are sectional views of the same, and FIG. 4 is a front view showing the second connector. Figures 5 and 6
The figure is the ■-■ and VI-Vl cross-sectional view, and Figure 7 is the 1st
FIG. 8 is a partial cross-sectional front view of the side plate to which the connector is connected, FIG. 9 is a partial cross-sectional front view of the side plate to which the second connector is connected, and FIG. 10 is its XX sectional view, 1st
Figure 1 is a developed plan view of the box with the first and second connectors attached to the side plates, and Figures 12 and 13 are cross sections corresponding to xn-xn and xm-xm in Figure 11 when the box is assembled. figure. FIG. 14 is a sectional view of a main part of a conventional example in an assembled state. 20 first connector 21 main body, 22: fitting hole, 23: hook hole,
23a: Engagement claw, 24: Insert piece, 24a: Connection base, 2
5 Nislit, 26: Locking piece, 26a: Open end, 26b
= cam, 27-28 = connecting projection (connecting part), 29: fitting groove (connecting part). 30: Second connector, 31: Main body, 31a: Outer wall, 31b
: Inner wall, 32 guide groove, 33 Ni slit, 34: Elastic piece, 34a: Hook piece, 35: Fitting projection, 36: Locking hole, 3
7/38: Connecting protrusion (connecting part), 39: Fitting groove (connecting part). 40-45: Side plate, 40a/40b/45a/45b=
Opposing edges. Application agent Hisashi Matsumoto

Claims (1)

[Claims] 1. A flat plate-shaped first connector and a second connector made of plastic material.
The first connector has a fitting hole extending from the inner surface toward the outer surface at one end thereof, a hook hole extending from the inner surface toward the outer surface and bending toward one end, and one end where the hook hole is located. a tongue-shaped insertion piece that protrudes outward from the part and bends in the thickness direction at its connecting base, and the other end is connected to the opposing edge of one of the opposing side plates; The second connector includes a fitting protrusion that protrudes outward and removably fits into the fitting hole at one end thereof, and a fitting protrusion that protrudes outward and bends toward the outer surface. A hook piece that is displaced in the thickness direction and removably fits into the hook hole, a guide groove that fits the insertion piece so that it can slide from one end to the other end, and the second connector. A connecting part is formed at the other end to be connected to the other side of the side plate of the box, and an engaging part is formed on one side of the insertion piece and the wall of the guide groove, protruding outwardly and movable inwardly. A corner connector for a prefabricated box, characterized in that a locking piece is formed on the other side with a locking hole in which the locking piece is fitted and locked from the inner side when the insertion piece and the guide groove are inserted into the deepest position.