JPH08210327A - Coupling structure of mole member and corner member in box - Google Patents

Abstract

PURPOSE: To install a corner member with simple work of pushing a corner member into a mole member by engaging the projection of the corner member with the engaging hole of the mole member. CONSTITUTION: A mole member 2, which is the shape of downward U where two pieces of side plates 2b are hung down at both side edges of a back board 2a and covers the top end faces 1u of the board material 1 constituting a box B, and a corner member 3, which has two pieces of clamp boards 3b astride the mole member 2 attached to the corner part of the box B, are coupled with each other. At this time, in the mole member 2, engaging holes 4 are made at both side plates 2b, while in the corner member 3, two pieces of projections 5 in a pair are made at the inwall faces of two pieces of clamp plates 3b, and also a taper part 5P is made at the face going toward the opening side of the clamp plate 3b of each of those projections 5, and the projections 5 of the clamp plates 3b are engaged with both engaging holes 4 of the mole member 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of a reinforcing and decorative molding member fitted on the upper end surface of an opening of a box and a corner member attached to a corner portion of the box.

[0002]

2. Description of the Related Art A conventional connecting structure of a molding member and a corner member will be described with reference to FIG. FIG. 6 shows Japanese Patent Laid-Open No. 6-1432.
FIG. 23 is a perspective view of a box B disclosed in Japanese Unexamined Patent Publication No. 22-221. The box B is formed by combining plate members A made of polypropylene plastic cardboard so as to be foldable, and has a structure in which a molding member C is fitted on the upper end surface of the plate member A. Further, a corner member D is attached to a corner portion of the box B as a measure for preventing misalignment when the boxes B of the same type are stacked. The corner member D
Has two pieces of clamp plates E vertically extending downward, the clamp plates E are laid over the outside of the molding member C, and the molding members C are penetrated so that the clamp plates E are made of metal. It is designed such that F is hammered in and integrally joined with the molding member C.

[0003]

In the conventional joint structure of the molding member C and the corner member D, one box B is provided with a tack F.
Since it is necessary to use at least eight of them, there is a problem that the work for driving the tack F takes a long time, and the work cost and the component cost are high. Furthermore, when the whole box B is made of synthetic resin, if the metal tack F is used, it becomes an impurity as it is, and there is a problem that the recycling efficiency is deteriorated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and is a plate member that forms a box, in which at least two side plates are provided so as to face each other at both side edges of the back plate. A connection structure of a molding member fitted to an end surface and a corner member having two pieces of clamp plates attached to a corner portion of the box and extending outside the molding member, wherein the molding member has the corners of both side plates. An engaging hole is formed in a portion where it overlaps with the member, and on the other hand, a pair of projections is formed on the inner wall surface of the two-piece clamp plate at the corner member, and a taper portion is formed on the surface of the projection toward the opening side of the clamp plate. To form
Provided is a joint structure of a molding member and a corner member in a box in which protrusions of a clamp plate are respectively engaged with both engaging holes of the molding member.

[0005]

When the corner member is aligned on the molding member and forcedly pushed in, the taper portions of both projections abut on both corners of the molding member to expand the clamp plate. When the projection rides on the side plate of the molding member and reaches the engagement hole, the elasticity of the clamp plate engages the projection with the engagement hole. Since the protrusion and the engaging hole are provided on both the front and back sides of the molding member and the clamp plate, they cannot be removed even if an impact is applied to the corner member in any direction.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a vertical sectional side view showing a main part, FIG. 2 is an exploded sectional perspective view showing a main part, FIG. 3 is a perspective view of a box, FIG. 4 is a vertical sectional side view showing a joint structure of a molding member and a plate member, Figure 5
(A), (b) is a cross-sectional top view which shows the other joint structure of a molding member and a plate member.

As shown in FIG. 3, the box B is formed by combining plate members 1 made of polypropylene plastic cardboard so as to be foldable. The upper end surface 1u of the plate member 1 is provided with reinforcement and decoration. Therefore, the molding member 2 is fitted. In addition, corner members 3 are attached to all corners of the box B as a measure for preventing misalignment when boxes B of the same type are stacked in multiple stages.

The molding member 2 is made of synthetic resin,
Two pieces of side plates 2b facing each other on both side edges of the back plate 2a,
The back plate 2a covers the upper end surface 1u of the plate member 1, and the side plates 2b and 2b sandwich both side surfaces of the plate member 1. The molding member 2 is provided on the market as a continuously molded long product, and the long product is cut in accordance with the size of the box B and both ends thereof are cut at an angle of about 45 degrees (Fig. 5 (a)). The part where the end faces of 45 degrees are butted corresponds to the corner part of the box B. Thus, circular engaging holes 4 and 4 are formed in the side plates 2b and 2b of the molding member 2 at positions near the corners of the box B. Both engagement holes 4 and 4 are arranged on the same axis,
It is possible to drill at the same time in one step with a drill. Of course, the positions of both engagement holes 4 and 4 may be shifted, but the boring process becomes a little troublesome.

On the other hand, the corner member 3 is an integrally molded product made of synthetic resin, and has an L-shaped horizontal plate 3a that matches the corner portion of the box B, and is hung downward from both side edges of the horizontal plate 3a. It is composed of two pieces of clamp plates 3b and 3b, and an enclosure frame 3c protruding upward from the outer edge of the horizontal plate 3a. The two pieces of the clamp plates 3b, 3b have a distance and a height that extend over the outside of the molding member 2, and also have projections 5 each having a cylindrical shape as a protrusion on both inner wall surfaces 3d, 3d. . The protrusion 5 has a shape such that a cylinder, which is a basic shape, fits into the engagement hole 4 of the molding member 2, and the opening 3e of the clamp plate 3b.
The surface facing the side, that is, the half circumference of the lower surface in FIGS. 1 and 2 is a tapered portion 5P.

Next, a method of connecting the molding member 2 and the corner member 3 will be described. First, as shown in FIG. 2, the corner member 3 is aligned with the molding member 2 fitted to the upper end surface of the opening of the box B, and the corner member 3 is forcedly pushed. Then,
The tapered portions 5P of the protrusions 5 contact both corners of the molding member 2, and the clamp plate 3b expands along the inclination of the tapered portions 5P. When the projection 5 rides on the side plate 2b of the molding member 2 and reaches the engagement hole 4, the elasticity of the clamp plate 3b causes the projection 5 to engage with the engagement hole 4. Since the upper half peripheral surface of the protrusion 5 has a semi-cylindrical shape, the protrusion 5 is firmly coupled to the engagement hole 4 and makes it impossible to pull out the corner member 3.

An adhesive material is used as the joining means of the molding member 2 and the plate member 1 if possible, and the following joining means is provided if the joining is difficult. First, as shown in FIG. 4, the distance between the side plates 2b, 2b of the molding member 2 is expanded to a thickness corresponding to two plate members, and an inwardly facing claw piece 2c is formed at the lower end of one side plate 2b. Then, above the plate member 1, two substrates 1a, which form a plastic corrugated board,
A cut line 1c is made at a depth from the side of the substrate 1a to the position immediately before the substrate 1b in 1b, and the remaining one substrate 1b is used as a hinge portion to fold outward, and the lower end edge of the folded portion (the plate The claw piece 2c is engaged with the upper end surface 1u of the member 1.). By doing so, the molding member 2 and the plate member 1 are firmly bonded to each other over the entire area in the longitudinal direction, so that the molding member 2 may warp even if the side of the top opening of the large box B is long. It does not come off.

Alternatively, as shown in FIGS. 5A and 5B, there is a joining method in which the molding member 2 and the plate member 1 are heat-welded at the corner butting portions. That is, FIG. 5 (a)
As described above, both end surfaces of the two molding members 2 and 2 are obliquely cut, the plate member 1 is fitted into each molding member 2, and the corner edge 1e of the plate member 1 is projected from the end surface of the molding member 2. Then, when the end surface of the molding member 2 and the corner edge 1e of the plate member 1 are heated and melted, and the two molding members 2 and 2 are butted against each other in the molten state, not only the molding members 2 and 2, but
The corner edge 1e of the melted plate member 1 is also integrated with the molding members 2 and 2, and as a result, the molding member 2 and the plate member 1 are firmly joined.

[0013]

As described above, in the joint structure of the molding member and the corner member of the present invention, the engaging hole of the molding member and the projection of the corner member are engaged with each other, so that the corner member can be easily pushed into the molding member. The corner member can be mounted by work, which greatly contributes to a significant reduction in working time as compared with the conventional tacking method, and thus to a reduction in working cost and parts cost. Further, by forming the engagement hole on the molding member side, it is possible to easily process a commercially available molding member provided as a long product using a punching machine, which is more advantageous in terms of cost. In addition, since the engaging hole is hidden by the corner member, the appearance is neat and the cleaning becomes easy. Further, since the connecting portions of the engagement holes and the projections are formed on both the front and back surfaces of the molding member and the corner member, they cannot be disengaged against impact in any direction. Furthermore, since all the boxes can be made of synthetic resin, they are easy to recycle and are extremely useful as environmental protection measures.

Further, if the two engagement holes of the molding member are arranged on the same axis, the workability can be improved because the drilling can be performed in one step.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a main part.

FIG. 2 is an exploded sectional perspective view showing a main part.

FIG. 3 is a perspective view of a box.

FIG. 4 is a vertical cross-sectional side view showing a combined structure of a molding member and a plate member.

5A and 5B are cross-sectional plan views showing another joint structure of the molding member and the plate member.

FIG. 6 is a perspective view of a conventional box.

[Explanation of symbols]

 B ... Box 1 ... Plate member 1u ... End face 2 ... Mold member 2a ... Back plate 2b ... Side plate 3 ... Corner member 3b ... Clamp plate 3d ... Inner wall surface 3e ... Opening 4 ... Engagement hole 5 ... Protrusion 5P ... Tapered part

Claims (2)

[Claims] 1. A molding member in which two side plates are provided so as to face each other at least on both side edges of a back plate so as to be fitted to an end surface of a plate member forming a box, and the molding member is attached to a corner portion of the box. A coupling structure with a corner member having two pieces of clamp plates extending over the outside of the molding member, wherein the molding member has an engagement hole formed in a portion where both side plates overlap with the corner member, In the corner member, two pairs of protrusions are formed on the inner wall surface of the two-piece clamp plate, and a taper portion is formed on the surface of the protrusion toward the opening side of the clamp plate. A joint structure of a molding member and a corner member in a box, characterized in that protrusions of a clamp plate are engaged with each other. 2. The joint structure for a molding member and a corner member in a box according to claim 1, wherein both engagement holes of the molding member are arranged on the same axis.