JP3120643B2 - Top plate for desks, tables, etc. and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a top plate such as a desk or a table which has high strength and is suitable for upsizing, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A top plate having a structure in which an internal space is filled with a synthetic foam resin has been proposed. That is, around the steel back plate, a steel peripheral frame is also fixed by spot welding via a mounting plate, and the surface plate is bonded to the peripheral frame, and the peripheral frame is made of an elastic material. It has a structure in which an end member is fitted, and a foamed synthetic resin is injected into the inside to foam. In addition, a large number of through holes are formed in the peripheral frame and the mounting plate, and the end members are simultaneously joined with the foamed synthetic resin.

[0003] However, the work of spot welding the peripheral frame to the back plate via the mounting plate is not only troublesome, but also tends to cause dimensional errors in the mounting position and thermal deformation during spot welding. There is a disadvantage that welding marks remain.
In addition, in order to attach the legs, it was necessary to separately weld the leg attachment members to the steel back plate. In addition, since the end member of this type of top plate is formed in advance into a predetermined cross-sectional shape with a synthetic resin or a synthetic rubber, it is impossible to form the end member into a desired shape by post-processing.

[0004]

SUMMARY OF THE INVENTION In view of the above situation, the present invention aims at solving the problem of increasing the size without spot welding by devising the structure of the inner shell made of a thin steel plate. It has the required strength and allows the attachment of a support for attaching the legs, and by devising the relationship between the inner shell and the front plate, back plate, and end members, it improves the appearance and facilitates processing. It is another object of the present invention to provide a tabletop such as a desk and a table, and a method of manufacturing the same.

[0005]

In order to solve the above-mentioned problems, the present invention is to form a peripheral frame by bending the periphery of a rectangular substrate made of a thin steel plate downward, and to form a lower end of the peripheral frame. A nut having an inner shell body formed by extending a reinforcing edge having a substantially L-shaped cross section inward at the edge, forming a cutout by cutting out four corners of the reinforcing edge, and attaching a leg to the cutout. A support for embedding is fitted, a front plate and a back plate are bonded to the front and back surfaces of the inner shell, and an end member is bonded to the peripheral frame, and the inner shell is surrounded by the substrate and the back plate. The tabletop, such as a desk and a table, was constructed by filling a foamed synthetic resin in the closed space.

Here, it is preferable that an inclined surface is formed at a lower portion of the end member, and a vertical width of a peripheral end surface of the top plate is set to be narrow.

Further, after a steel thin plate is subjected to press punching, bending is performed to form a peripheral frame around a rectangular substrate, and a lower end edge of the peripheral frame has a substantially L-shaped section. A processing step of an inner shell body in which a reinforcing edge having a U-shape is extended and cutouts are formed at four corners of the reinforcing edge, and a support for embedding a nut for attaching a leg to the cutout is fitted. Along with bonding, a bonding step of a back plate or the like for bonding a back plate to the back surface of the inner shell, a holding step of clamping both front and back surfaces of the inner shell to which the back plate is bonded by hot pressing, A space filled with a substrate and a back plate is filled with a foamable synthetic resin, and a resin filling step is performed by foaming, and a surface plate is adhered to a surface of the substrate of the inner shell, and an end member is attached to the peripheral frame. A bonding process of a surface plate or the like to be bonded, and a finish for processing the end member into a desired shape Treatment process become more desks, to provide a method of manufacturing a top plate of the table or the like.

[0008]

The top plate of the desk, table, etc. of the present invention having the above-mentioned contents is formed by bending a steel inner shell body around a rectangular substrate downward to form a peripheral frame. Since the reinforcing edge having a substantially L-shaped cross-section is extended inward at the lower edge of the rim, the structural edge is provided by the peripheral frame and the reinforcing edge without welding other members by spot welding. Less distortion, easy to attach the surface plate and end members, and fit the support for embedding the nut for mounting the leg into the notch formed by cutting out the four corners of the reinforcing edge, It is possible to attach the support at an accurate position, and when the inside is filled with a foamed synthetic resin, the support is fixed by the resin. Since the end member is bonded to the peripheral frame of the inner shell, the end member can be processed into a desired shape when formed of a wooden material. For example, it is also possible to form an inclined surface below the end member and narrow the vertical width of the peripheral end surface of the top plate.

Further, in the manufacturing method, since the inner shell is integrally formed by press punching and bending, a troublesome spot welding is not required, and the periphery is made of a surface plate.
Since it is covered with the back plate and the end members, the inner shell itself does not need to be painted, and the process can be simplified.Also, even if the inner shell is slightly warped at the time of processing, after bonding the back plate, remove them after bonding. By filling the internal space with an expandable synthetic resin and foaming it in a state where it is corrected by clamping with a hot press, it is possible to fix the resin in a corrected state when the resin is cured. In addition, since the end member is bonded to the peripheral frame of the inner shell, it can be processed into a desired shape by finishing, and the end member can be made of a single piece of oak, a single piece of lamin, or the like. It is possible to use a material having excellent appearance and to change the material.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; 1 is an overall perspective view of a top plate T according to the present invention, and FIG. 2 is an exploded perspective view of the top plate T. In the drawing, 1 is an inner shell, 2 is a support, 3 is a back plate, 4 is a front plate, and 5 is a front plate. Each end member is shown.

According to the present invention, a peripheral frame 7 is formed by bending the periphery of a rectangular substrate 6 made of a thin steel plate downward, and a reinforcement having a substantially L-shaped cross section is formed inward at the lower end edge of the peripheral frame 7. A support for embedding a nut 10 for extending the edge 8 and forming a cutout 9 by cutting out four corners of the reinforcing edge 8, and mounting a leg in the cutout 9. The body 2 is fitted, the front plate 4 and the back plate 3 are bonded to the front and back surfaces of the inner shell 1, and the end member 5 is bonded to the peripheral frame 7. The gist is that a foamed synthetic resin is filled in a space surrounded by the face plate 3.

More specifically, the inner shell 1 is formed by pressing a thin steel plate into a predetermined shape by pressing.
The periphery of the rectangular substrate 6 in a plan view is bent downward at a right angle by bending to form a peripheral frame 7, and the lower edge of the peripheral frame 7 is bent inward at a right angle and the inner edge thereof. Are formed at right angles to form a reinforcement edge 8 having an L-shaped cross section. Here, at the time of the above-described press punching, the reinforcing edges 8 corresponding to the four corners on the back surface side of the inner shell 1 are cut out, so that the notches 9,. It is formed. The notch 9 has an L-shape in a plan view, and when the support 2 is fitted from a direction perpendicular to the substrate 6, the notch 9 prevents the support 2 from moving in a direction parallel to the substrate 6. ing.

In the present embodiment, the support 2 is made of a medium fiberboard (MDF) made of wood flour solidified with an adhesive, and has a square shape in a plan view, and has a thickness of the substrate 6 of the inner shell 1. The distance from the inner surface to the outer surface of the reinforcing edge 8 is matched. Therefore, in a state where the support 2 is fitted into the notch 9, the notch edge 9 a contacts the side surface of the support 2, and the end edge 9 b of the rising piece 8 a of the reinforcing edge 8 is on the side surface of the support 2. The back surface of the support 2 is flush with the lower surface of the reinforcing edge 8. And
A nut 10 for mounting a leg (not shown) is embedded in the center of the support 2. In addition, this nut 10
It may be embedded in the support 2 in advance, or may be formed by embedding the anchor by post-processing after assembling the top plate T. Further, in this embodiment, the nut 10 appears on the surface of the support 2. There is no problem even if it is completely hidden inside except for the screw holes.

The back plate 3 is formed of a printed plywood in this embodiment, and has through holes 11,... At four corners of the support 2 at positions corresponding to the nuts 10.

In the present embodiment, the surface plate 4 is formed by stacking a veneer on the surface of a 4-mm-thick MDF plate in order to give a wooden appearance in appearance, but the material and structure are not limited. .

In the present embodiment, the end member 5 is composed of two members, an end material 12 made of MDF and a single material 13 of oak or lamin, and the end member 12 is formed on the surface of the peripheral frame 7 of the inner shell 1. After that, the single material 13 is adhered to the side surface of the end material 12. The reason for using the single material 13 is to give a woody appearance in appearance, and therefore, the thickness of the single material 13 may be the minimum necessary.

In this embodiment, urethane foam is used as the foamable synthetic resin to be filled in the space surrounded by the inner shell 1 and the back plate 3; Synthetic resin can also be used, and the expansion ratio is low,
It is appropriately set according to the size of the top plate T, such as high foaming. In the case of low foaming, the strength of the top plate T increases, but the weight increases, so that a foaming ratio as high as the strength permits is preferable. In this embodiment, an injection port 14 is formed in the peripheral frame 7 of the inner shell 1 in order to fill the expandable synthetic resin, and a plurality of the injection ports 14 can be provided.

Next, a method of manufacturing the top plate T of the present invention will be described. The production method of the present invention comprises a process A for processing an inner shell.
Bonding step B for back plate, etc., holding step C, resin filling step D, bonding step E for front plate, etc., and finishing step F
Consists of

In the inner shell processing step A, a steel thin plate is subjected to press punching, and then bent to form a peripheral frame 7 around a rectangular substrate 6. A reinforcement edge 8 having a substantially L-shaped cross section extending inward at the lower end edge is provided, and cutouts 9 are formed at four corners of the reinforcement edge 8.

In the bonding step B of the back plate or the like, a support 2 for embedding a nut 10 for mounting a leg in the cutout 9 is fitted and bonded, and the back plate 3 is attached to the back of the inner shell 1. Is to adhere.

In the holding step C, both the front and back surfaces of the inner shell 1 to which the back plate 3 is bonded are clamped by hot pressing, and the bonding of the back plate 3 to the inner shell 1 is promoted by heating. In addition, when correcting the deformation of the inner shell 1 and filling the expandable synthetic resin described later, the substrate 6 and the back plate 3 are held flat so as not to be deformed by pressure.

In the resin filling step D, the space surrounded by the substrate 6 and the back plate 3 of the inner shell 1 is filled with an expandable synthetic resin and foamed by heating with the hot press. . Here, the filling of the resin is performed from the injection port 14 formed in the peripheral frame 7. When the resin is filled, a peripheral frame 7 is provided around the periphery, the peripheral frame 7 is joined to each other at a corner portion, and the support member 2 is provided at the corner portion. Since the distance from the frame 7 is reduced, the flow resistance of the resin to the corners increases, and the resin does not leak to the outside during filling and foaming. Further, since there is no member that blocks the flow of the resin in the internal space, the overall Can be uniformly filled. That is, the joint portion of the peripheral frame 7 at the corner portion of the inner shell 1 has a gap through which the gas expelled from the corner by the filled foamable synthetic resin can escape to the outside, and the resin does not leak to the outside. It has a sealing property. Reference numeral 15 in FIGS. 4 and 5 indicates a foamed synthetic resin.

In the bonding step E of the surface plate or the like, the surface plate 4 is bonded to the surface of the substrate 6 of the inner shell 1 and the end member 5 is bonded to the peripheral frame 7.

In the finishing step F, the end member 5 is NC-routed into a desired shape.

More specifically, in the present embodiment, in the bonding step E of the surface plate or the like, first, as shown in FIGS. After bonding, the end material 12 is adhered to the surface of the peripheral frame 7 of the inner shell 1 and the back surface of the surface plate 4, and then the surface plate 4 is trimmed to be flush with the end surface of the end material 12. The offcuts 12
And the single material 13 is bonded to the edge of the surface plate 4.

Then, in the finishing step F,
The end member 12 and the single member 13 constituting the end member 5 are processed by a router, and the lower part of the end member 5 is cut at about 45 degrees to cut the inclined surface 1.
6 is formed, and the vertical width of the peripheral end surface of the top plate T is set narrow,
The top plate T is made to look thin from diagonally above.

[0027]

According to the top plate of the desk, table or the like of the present invention as described above, the periphery of a rectangular substrate made of a thin steel plate is bent downward to form a peripheral frame. A reinforcing edge having a substantially L-shaped cross section is extended inward at the lower edge of the inner edge, and a notch is formed by cutting out four corners of the reinforcing edge, and a leg is attached to the notch. A support for embedding a nut is fitted, a front plate and a back plate are bonded to the front and back surfaces of the inner shell, and an end member is bonded to the peripheral frame. Since the space enclosed by is filled with foam synthetic resin, the steel inner shell,
The periphery of the rectangular substrate was bent downward to form a peripheral frame, and a reinforcement edge having a substantially L-shaped cross section was extended inward at the lower end edge of the peripheral frame. It has structural strength that can withstand enlargement due to the peripheral frame and reinforcing edge without welding members, has little distortion, naturally has no spot welding marks, and the substrate and peripheral frame are planar It is easy to attach the surface plate and end members, and the support for embedding the nut to attach the leg to the notch formed by cutting out the four corners of the reinforcing edge allows accurate positioning of the support. It can be easily attached to a vehicle, the size of the support can be reduced, and when the inside is filled with a synthetic resin foam, the support is fixed by the resin. And since it is the structure which attached the end member to the peripheral frame of the inner shell, when the end member was formed of wood material, it can be processed into a desired shape. It is also possible to form an inclined surface, set the upper and lower widths of the peripheral end surface of the top plate to be narrow, and make the thickness of the top plate thin and visually perceive.

According to the method of manufacturing a top plate of the present invention,
After performing a press blanking process on a steel thin plate, a bending process is performed to form a peripheral frame around a rectangular substrate, and a reinforcing edge having a substantially L-shaped cross section facing inward is formed at a lower end edge of the peripheral frame. A processing step of an inner shell body extending and forming notches at four corners of the reinforcing edge, and a support for embedding a nut for mounting a leg in the notch is fitted and bonded, and A bonding process of a back plate or the like for bonding the back plate to the back of the shell,
A holding step of clamping the front and back surfaces of the inner shell to which the back plate is bonded by hot pressing, and filling a space surrounded by the substrate of the inner shell and the back plate with a foamable synthetic resin and foaming. A resin filling step, a step of bonding a surface plate to the surface of the substrate of the inner shell, a step of bonding a surface plate or the like for bonding an end member to a peripheral frame, and a finishing step of processing the end member into a desired shape. Since the inner shell is formed integrally by press punching and bending, it does not require time-consuming spot welding.Moreover, since the periphery is covered with the front plate, the back plate, and the end member, the inner shell is formed. The shell itself does not need to be painted and the process can be simplified.Also, even if the inner shell is slightly warped during processing, after bonding the back plate, clamp them with a hot press and correct them, Foamable synthetic resin for internal space By filling and foaming, when the resin is cured, it can be fixed in a straightened state, the foamable synthetic resin can be uniformly filled inside, and the end member is bonded to the peripheral frame of the inner shell body Since it is a thing, the outer shape of the end member can be processed into a desired shape by finishing, and the end member can be made of a material having excellent appearance such as a single oak material, a single lamin material, or the like. This has the effect that it can be changed.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a top plate according to the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is an essential part perspective view showing a top plate corner portion cut away.

FIG. 4 is a partial cross-sectional view of a central portion of the top plate.

FIG. 5 is a partial sectional view of a corner portion of the top plate.

[Explanation of symbols]

 T Top plate 1 Inner shell 2 Support 3 Back plate 4 Surface plate 5 End member 6 Substrate 7 Peripheral frame 8 Reinforcement edge 9 Notch 10 Nut 11 Through hole 12 End material 13 Single material 14 Injection 15 Foam synthetic resin 16 Tilt surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-22145 (JP, A) JP-A-2-209105 (JP, A) Actually open 1983-70144 (JP, U) Actually open 1979- 110401 (JP, U) Actually open Hei 2-125627 (JP, U) Actually open Showa 61-45839 (JP, U) Actually open Showa 54-88821 (JP, U) Actually open Showa 57-78387 (JP, U) 47-103 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47B 1/08-41/06 A47B 96/18-96/20

Claims (3)

(57) [Claims] 1. A peripheral frame is formed by bending a periphery of a rectangular substrate made of a thin steel plate downward, and a reinforcing edge having a substantially L-shaped cross section is extended inward at a lower end edge of the peripheral frame. A notch formed by cutting out four corners of the reinforcing edge, and a support for embedding a nut for attaching a leg to the notch is fitted into the notch; Adhering the front plate and the back plate to the front and back and bonding the end member to the peripheral frame,
A top plate such as a desk or a table, wherein a space surrounded by the substrate of the inner shell and the back plate is filled with a foamed synthetic resin. 2. The top plate of a desk, a table or the like according to claim 1, wherein an inclined surface is formed below the end member, and a vertical width of a peripheral end surface of the top plate is set to be narrow. 3. A steel thin plate is subjected to press punching, and then bent to form a peripheral frame around a rectangular substrate and to have a substantially L-shaped cross section facing inward at a lower end edge of the peripheral frame. A processing step of an inner shell body in which a reinforcing edge having a character shape is extended and cutouts are formed at four corners of the reinforcing edge, and a support for embedding a nut for mounting a leg in the cutout is fitted. A step of bonding a back plate or the like to bond a back plate to the back surface of the inner shell body, a holding step of clamping both front and back surfaces of the inner shell body to which the back plate is bonded by hot pressing, Filling the space surrounded by the substrate and the back plate with a foamable synthetic resin, and a resin filling step of foaming, and bonding the surface plate to the surface of the substrate of the inner shell,
A method for manufacturing a top plate such as a desk or table, comprising: a step of bonding a surface plate or the like for bonding an end member to a peripheral frame; and a finishing step of processing the end member into a desired shape.