JPH0221408Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a corner protector that protects the corners of a rectangular parallelepiped object, and particularly relates to a corner protector that is most suitable for protecting the corners of a portable speaker box.

Traditionally, portable speaker boxes used in places where acoustic equipment is insufficient, such as outdoor concerts, have been designed to prevent damage during movement and transportation, and to prevent the corners from breaking or damaging the other party. Generally, corner protectors made of metal plates are attached to round the corners. The corner protectors are attached with screws or the like to each of the eight corners of the speaker box where three planes meet.

In some cases, portable speaker boxes may be used in combination. In this case, if the corner protectors protrude from the top plate or bottom plate of the speaker box, if they are stacked directly, the upper and lower protrusions will come into contact with each other, resulting in instability and danger. Conventional speaker boxes of this type that take into consideration the stacking of speaker boxes have only been proposed with casters provided on the bottom plate. It is designed to connect the upper speaker box and the lower speaker box by installing a caster holder on the top plate into which the caster of the upper speaker box fits. Applying this idea to a speaker box without a caster,
The casters will be replaced with leg-like protrusions.

However, in such a speaker box, the corner protector, the caster holder, and the mounting location of the convex part that replaced the caster are far apart, so each must be installed separately during manufacturing, making the installation work troublesome. It was hot.

This invention aims to provide a corner protector that eliminates the above-mentioned drawbacks.

This invention will be explained below based on an illustrated embodiment.

In FIGS. 1 to 4, 2 is an L-shaped end plate, and 4 and 6 are rectangular side plates of the same size. These end plates 2 and side plates 4 and 6 are assembled at an angle of 90 degrees to each other so that their respective outer surfaces are parallel to the surfaces converging at the corners of the speaker box. The connecting portions of the outer surfaces of the side plates 4 and 6 are rounded.

Further, a trapezoidal protrusion 12a having a square planar shape is protruded from the end plate 2 on the outer surface of the side plate 4.
A recess 14a is provided at a rotationally symmetrical position on the outer surface of the side plate 6 of the trapezoidal protrusion 12a, with the axis of symmetry being a straight line at the intersection of the extended plane of the outer surface of the side plate 6.

This recess 14a has a shape corresponding to the trapezoidal projection 12a, and is formed to be one size larger than the trapezoidal projection 12a, and only the depth is smaller than the height of the trapezoidal projection 12a.

A recess 14b, which is equal to the recess 14a, is provided on the outer surface of the side plate 4 on the side opposite to the end plate 2, and the straight line at the intersection of the extended planes of the outer surfaces of the side plate 4 and the side plate 6 is the axis of symmetry. At a symmetrical position on the outer surface of the side plate 6 of this recess 14a, there is a trapezoidal projection 12a.
A trapezoidal protrusion 12b is provided.

A screw hole 1 is provided at the center of the trapezoidal protrusions 12a and 12b.
6 is drilled on the upper surface side of the trapezoidal protrusions 12a, 12b of this screw hole 16, which is deeper than the thickness of the screw head and whose diameter is slightly larger than the diameter of the screw head so that the screw head is recessed. A large screw seat 18 is provided.

Further, the back side of the recesses 14a, 14b of the side plates 4, 6 and the periphery of the back side of the screw hole 16 protrude from the back side by the same height, and these portions come into contact with the speaker box.

The corner protector configured in this manner is manufactured by integrally molding synthetic resin such as polycarbonate, and as shown in FIG. They are arranged at each corner so that the back surface of the plate 2 is in contact with each other, and are fixed by screws 22 passed through the respective screw holes 16.

Therefore, when the speaker box 20 with the corner protectors attached to each corner is placed directly on the floor of a stage or the like, the eight trapezoidal protrusions 12a of the corner protectors at the four corners of the bottom plate of the speaker box 20, Of 12b,
Four trapezoidal protrusions 12a and 12b projecting downward function as support legs and prevent the bottom surface of the speaker box 20 from coming into direct contact with the floor.

In addition, when stacking speaker boxes 20 with corner protectors attached, as shown in FIG. If the upper speaker box 20 is placed so that the opposing trapezoidal protrusions 12a, 12b of the corner protectors at the four corners of the plate 26 are fitted into the recesses 14a, 14b,
The upper speaker box 20 has a trapezoidal projection 12a,
12b and recesses 14a and 14b, the lower speaker box 20 is firmly connected to the top plate 26, so that the upper speaker box 20 will not shift or fall due to vibration or impact.

Similarly, when the speaker boxes 20 are connected horizontally, the trapezoidal protrusions 12a, 12b and the recesses 14a, 14b of the corner protectors located at the four corners of the adjacent side plates of each speaker box 20 fit into each other. By simply moving one speaker box 20 in this manner, both speaker boxes 20 are connected, and it is possible to prevent only one speaker box 20 from moving forward or backward due to impact or vibration.

In addition, if you move the speaker box 20 or
When stacking, some of the trapezoidal protrusions 12a, 1
Although an excessive force that deforms the trapezoidal projections 12a, 12b may be applied only to the trapezoidal projections 2b, the deformation of the trapezoidal projections 12a, 12b is limited by the screws 22 inside the trapezoidal projections 12a, 12b, and the trapezoidal projections 12a, 12b are 12a, 12b will not come off from the recesses 14a, 14b or be crushed. In addition, the trapezoidal protrusion 12
The height of the recesses 14a, 14b is greater than the depth of the recesses 14a, 14b, and the head of the screw 22 is shaped like a trapezoidal projection 12a, 12b.
Since it is depressed from the upper surface of 2b, the trapezoidal protrusion 12
Even if the height of a and 12b decreases due to wear, the connection with the recesses 14a and 14b may become weak or the screw 2
2's head won't damage the floor.

As explained above, the corner protector of this invention not only has the function of protecting the corners of the speaker box 20 that conventional corner protectors have, but also provides support when the speaker box 20 is placed directly on the floor etc. Speaker boxes 20 serve as legs and are used when stacking.
It not only has a function of connecting the speaker boxes 20 to each other, but also has a function of connecting the speaker boxes 20 to each other even when the speaker boxes 20 are arranged horizontally. Moreover, these connections are made by fitting the convex portion 12a of one speaker box 20 and the recess 14a of the other speaker box 20, and fitting the convex portion 12b of the one speaker box 20 and the convex portion 12b of the other speaker box 20. Since this is done by fitting, that is, there are two joining points, these connections are reliably and firmly made. Moreover, since this corner protector has the same shape at every corner, it is easy to manufacture and the cost is low. In addition, in Japanese Utility Model Application Publication No. 57-74131, protective members having only one concave portion on the upper surface are provided at the four corners of the upper surface of the package, and only one convex portion is provided at the four corners of the lower surface of the package. Disclosed are devices each provided with a protective member. However, since the protective member provided on the upper surface and the protective member provided on the lower surface have different shapes, they must be manufactured separately, which makes manufacturing troublesome and increases costs. Furthermore, there is a problem in that although two packages can be combined when stacked, two packages cannot be combined when placed side by side. Moreover, since the connection is just one convex part fitted into one concave part, there is a problem that it is not strong. On the other hand, the corner protector according to this invention does not have this problem at all.

[Brief explanation of the drawing]

Figure 1 is a front view of the corner protector based on this invention, Figure 2 is a left side view of the same corner protector, Figure 3 is a plan view of the same corner protector, and Figure 4 is the same as the figure 2. 5 is a perspective view showing a state in which the corner protectors are attached, and FIG. 6 is a sectional view showing a stacked state of speaker boxes to which the corner protectors are attached. 2... End plate, 4, 6... Side plate, 12a, 12b
... Trapezoidal projection, 14a, 14b ... recess.

Claims (1)

[Scope of utility model registration request] First, second, and third plate-shaped portions corresponding to the three planes forming the corner are integrally formed so as to cover the corner where the ridge lines of the rectangular parallelepiped come together from three directions,
A continuous portion corresponding to the ridge line of each of the plate-like portions is formed to be rounded, and a concave portion and a convex portion are provided on the outer surface of the first plate-like portion, respectively, and a concave portion and a convex portion are provided on the outer surface of the first plate-like portion, respectively.
recesses and protrusions are also provided on the outer surface of the plate-like part, respectively, and the recesses and protrusions of the first plate-like part and the recesses and protrusions of the second plate-like part are The first and second plate-like parts are rotated about a straight line at the intersection of the extension planes of the outer surfaces of the first and second plate-like parts so that their outer surfaces face each other. A relationship in which the concave part of the plate-like part and the convex part of the second plate-like part fit together, and the convex part of the first plate-like part and the concave part of the second plate-like part fit together. A corner protector characterized by being provided in.