JPH04307212A - Integrally molded structure of desk, etc. - Google Patents

Abstract

PURPOSE:To increase the strength and rigidity of a desk without largely augmenting the material of construction, and to prevent shape distortion such as warpage, torsion, etc., by integrally molding a solid structure, in which a plurality of hollow sections independent in a table plate, a side plate or a rear face plate are disposed at specific positions, by one molding die. CONSTITUTION:A desk is formed as a solid structure, into which a hollow section is incorporated, by one injection molding die. Approximately rectangular two hollow sections 4 are disposed symmertically to the table plate 1 of the desk 10. A plurality of specified independent hollow sections 5, 6, 7 are also formed symmetrically or under an arrayed state in side plates 2 and rear face plates 3 supporting the table plate 1 so as not to generate warpage, torsion, etc. Skin wall thickness T1 on the side, where load is applied, is made larger than wall thickness T2 on the reverse side only by a fixed quantity while holding the hollow sections 4 in the table plate 1, thus preventing warpage and torsion.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to table boards (table tops).
Alternatively, the present invention relates to a desk or the like having a plurality of independent hollow portions inside the side plate or rear plate.

0002

2. Description of the Related Art Conventionally, desks and the like have been constructed by assembling wooden or resin-molded parts of a predetermined shape with adhesive or bolts, or by pressing metal parts such as stainless steel.

0003

However, in the above configuration, metal members such as stainless steel are heavy, and the equipment for processing the stainless steel members is large-scale, resulting in high manufacturing costs. When wood or resin molded members are assembled by gluing or bolts, the weight is reduced, but assembly steps are required. Furthermore, when the thickness of the constituent members is thin, there is a problem that warping and twisting are likely to occur. In view of the above problems, the present invention provides a desk that improves the strength of the structure by means such as injection molding, reduces shape distortions such as warping and twisting, and has a structure with excellent productivity.

0004

[Means for Solving the Problems] In order to solve the above problems, the integrally molded structure such as a desk of the present invention applies a hollow injection molding technique to provide a plurality of independent structures inside the table plate, side plate, or back plate. An integral structure with a predetermined hollow section is formed by integral molding in one mold or by one-time molding, and is formed by injection molding or a combination of injection molding and blow molding. It consists of

[0005]

[Function] With the above-described structure, the present invention can be manufactured with high productivity, improves the strength of the desk without significantly increasing the amount of resin material used, reduces shape distortion such as warping and twisting, and has a wide variety of designs. It provides excellent desks, etc.

[0006]

[Example] The following is an example of the present invention shown in FIGS. 1 to 5.
This will be explained with reference to the drawings shown in . FIGS. 1 to 5 show two embodiments of the present invention. The desk of the illustrated embodiment is formed as an integral structure with a built-in hollow part using a single injection molding mold, and the desk is made of an integral structure with a built-in hollow part. No assembly required. Of course, injection molding and blow molding may be used together if necessary. 1 is a perspective view showing a desk according to a first embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a top view of FIG. 1, and FIG.
Figure 2 shows a side view of Figure 1;

In the desk of the first embodiment, two approximately rectangular hollow portions 4 are arranged symmetrically in the table board 1 (table top) of the desk 10. A plurality of predetermined independent hollow portions 5, 6, and 7 are provided inside the side plates 2 and rear plate 3 that support the table board 1 in a symmetrical or aligned state to prevent warping, twisting, etc. . The illustrated configuration ensures rigidity and prevents shape distortion. Furthermore, in the embodiment of the present invention, the surface thickness of the table plate, side plate, or rear plate is not constant, but the wall thickness and the size of the hollow portion are set depending on the part. For example, on table board 1,
Warpage and twisting are prevented by configuring the surface wall thickness T1 on the side on which the load is applied to be larger than the wall thickness T2 on the opposite side by a predetermined amount with the hollow portion 4 in between. Further, the total volume occupied by the hollow portion is set to 20% to 90% of the volume occupied by the external shape of the desk 10. The total volume occupied by the hollow portion may be determined depending on the purpose of use, required strength, and the material of the desk (eg, resin, ceramics, etc.). By arranging a plurality of hollow portions at predetermined positions inside all or any necessary plate portions of the table plate, side plates, or rear plate, rigidity is ensured and shape distortion is prevented.

FIG. 5 shows a second embodiment of the present invention, and shows a side view of a desk with a side surface partially cut away. A predetermined portion of the side plate 52 of the desk 50 absorbs unevenness on the installation floor, and
Elastic legs 53 that absorb external vibrations are arranged at four predetermined locations. The elastic leg portion 53 has hollow portions 57 having a generally T-shaped cross section arranged at predetermined positions at the lower ends of the four corners of the side plate, and arc-shaped thin portions 54 having elasticity having the same function as a compression spring are arranged symmetrically. It is configured as follows. It deflects upward in response to uneven surfaces on the installation floor and external vibrations, absorbing and reducing desk rattles and vibrations. The elastic legs 53 are, of course, provided integrally with the side plates 52 by one-shot molding.

As described above, according to the embodiment of the present invention, the desk has a substantially two-layer structure, and a plurality of independent hollow portions are arranged between the layers in a symmetrical or aligned state, thereby greatly increasing the rigidity. Improve. Although the resin material used is slightly increased compared to a conventional desk with a constant wall thickness, the material cost itself is low and the increase in the proportion of the total cost of the desk is small. In fact, one-shot molding eliminates assembly man-hours, improves productivity, and significantly reduces desk costs. Furthermore, by setting the size and shape of the hollow part to be deployed, the required mechanical strength can be obtained by changing the value for each part of the same structural member, and elastic structural parts can be simultaneously Can be molded. Furthermore, by shifting the position of the hollow part for the table, side, or rear panel from the center of the structural member plate thickness and making the skin thickness uneven, it is possible to reduce the amount of resin material used and improve rigidity. . In addition, in the above embodiment, the table board is rectangular and the external shape is an example of a desk having a roughly rectangular shape, but the shape of the table board is not only rectangular but also circular, various free curves, etc. Needless to say. Furthermore, the side plates and the rear plate may also have a curved surface such as a pot shape, or a columnar shape with a corner or round cross section. In addition, although we have described an example of a resin member as a constituent material of the desk, it is also possible to use not only resin materials but also injection moldable members such as ceramics, metal powder kneaded with a predetermined binder, or glass powder kneaded with a predetermined binder. It goes without saying that this is a good thing. Furthermore, the desk surface is equipped with an infrared absorbing film that absorbs infrared rays.
The inner surface of the side plate or rear plate, that is, the side facing the legs and waist of a person, may be coated with an infrared reflective film that reflects infrared rays to improve the heat retention effect. Furthermore, it is also possible to form a scented desk by coating the surface of the desk with microcapsules containing an aromatic agent or by mixing them into the injection member during injection molding.

Furthermore, the hollow structure having the above-mentioned elastic function not only provides stability on the installation floor, but also can be used for drawers of desks, etc., or for boxes with collision surfaces such as doors that can be rotated to open and close. It can be applied to the lid of a box, etc.

[0011]

[Effects of the Invention] As described above, according to the desk of the present invention, mass production can be carried out at low cost and with high productivity, and the strength and rigidity of the desk can be improved without significantly increasing the amount of materials used. This prevents shape distortion. Furthermore, other effects of the present invention include a drawable box body that has a collision surface during storage, such as the contact surface of the legs of a desk or chair, or a desk drawer, or a lid body that is rotatably attached to the box body. In a lid body having a section, a hollow part provided on the collision surface side and a thin part formed by expanding into a protrusion shape, for example, provide an elastic function, so that desks, chairs, etc. can be placed softly on the floor. Alternatively, it has excellent effects such as absorbing impact sounds when storing a drawer or opening and closing a lid, as well as absorbing impact force and improving reliability.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a desk in a first embodiment of the present invention.

[Fig. 2] Front view of the desk in the first embodiment of the present invention.

[Figure 3]
Top view of the desk in the first embodiment of the present invention

FIG. 4: Side view of the desk in the first embodiment of the present invention.

FIG. 5 is a side view of a part of the desk in the second embodiment of the present invention.

[Explanation of symbols]

1 Table board 2 Side plate 3 Rear view 4 Hollow part 5 Hollow part 6 Hollow part 7 Hollow part 10 Desk 50 desk 51 Table board 52 Side plate 53 Elastic legs 54 Thin wall part 55 Hollow part 56 Hollow part 57 Hollow part

Claims (8)

[Claims] 1. A desk formed by injection molding of an integral structure in which a plurality of independent hollow parts are arranged in a predetermined manner inside a table plate, side plate, or rear plate. [Claim 2] An integral structure is formed by injection molding, in which a plurality of independent hollow parts are arranged in a predetermined manner, and a protrusion having an elastic function is arranged adjacent to the hollow part. desk. 3. The desk according to claim 1, comprising an injection moldable member such as resin, rubber, ceramics, metal powder kneaded with a predetermined binder, or glass powder kneaded with a predetermined binder. 4. A desk made by injection molding an integral structure in which fragrance capsules are coated on the surface of the desk or mixed into a member, and a plurality of independent hollow sections are disposed inside the desk at predetermined positions. 5. Injection molding an integral structure in which an infrared absorbing film or an infrared reflecting film is coated on the surface of a desk or mixed into a member, and a plurality of independent hollow portions are disposed inside at predetermined positions. A desk. [Claim 6] In a desk or the like having a plurality of independent hollow portions disposed in a predetermined manner inside and having legs relative to the ground surface, the legs on the ground surface side are made thinner and expanded into a protruding shape. A desk characterized by having an elastic function,
Integrally molded structures such as chairs. [Claim 7] In a desk or the like that stores a box such as a drawer, a plurality of independent hollow portions are provided inside the side of the box or desk that serve as a stop wall when stored, and the stop surface side is made thin. , An integrally molded structure such as a box or a desk, characterized in that it has an elastic function by expanding toward the stop surface. 8. A lid body arranged to be openable and closable on a box body, wherein a portion of the lid body that collides with the box body is constituted by an integrally molded member having a hollow portion, and a surface that collides with the box body. What is claimed is: 1. A lid body characterized in that the side is thin-walled, the thin-walled molded portion is expanded and formed on the collision surface side, and the thin-walled molded portion has an elastic function.