JPH0510657Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a desk having pipe-shaped legs attached to the lower surface of the top plate.

[Conventional technology]

As shown in Fig. 5, conventional desks of this type have pipe-shaped legs b that run along the bottom surface of the top plate a and are fixed with brackets c and bolts d, or The girder-like parts of the legs are fitted and fixed in the grooves provided on the lower surface (Japanese Utility Model Publication No. 118111/1983), or the girder-like parts of the legs are fitted into the grooves provided on the lower surface of the crosspiece fixed to the underside of the desk. A device in which the parts are fitted and fixed (Japanese Utility Model Publication No. 32-4063) is known.

[Problem to be solved by the invention] In the conventional desk shown in FIG. 5, bolts d are used to attach legs b to top plate a.
In addition to this, bracket c is required, which increases the number of parts and the number of assembly steps.The problem is that the upper part of the upper leg b only makes linear contact with the bottom surface of the top plate, resulting in poor mounting strength. In addition, in the case shown in both publications, the girder-shaped parts of the legs fit into grooves provided on the lower surface of the top plate or the crossbars fixed to the top plate, so the structure shown in FIG. Although the mounting strength is improved compared to the conventional example, the groove is shallow and only a small part of the cross-sectional shape of the leg girder is fitted, so the holding force of this groove is Therefore, it could hardly be expected that the strength would be improved by fitting the girder-like portions of the legs into the grooves.

[Means and actions for solving problems]

The present invention was developed in view of the above, and involves fitting the girder-shaped parts of the legs into grooves provided on the bottom surface of the top plate, and inserting the girder-shaped parts into the insert nuts embedded in the bottom of the grooves of the legs. In a desk that is fixed with a bolt that passes through a bolt hole provided in a girder-like part and is screwed into the desk, the groove is set to 1/1/2 of the cross-sectional shape of the girder-like part of the leg.
2 or more, and protruding ridges that interfere with the cross-sectional shape of the girder-like part are provided on both edges of this groove, and the length of the groove is set to the depth of the girder-like part of the leg. The side ends of the spar-like parts are fitted into the ends of the grooves, and the spar-like parts of the legs are fitted into the grooves provided on the lower surface of the top plate, and the side ends of the spar-like parts are fitted into the grooves provided on the lower surface of the top plate. It is engaged with the protrusions provided on the edges on both sides of the groove, and the side ends of the girder-like part are also fitted into contact with the ends of the groove, and in this state, they are fixed with bolts passing through them. be done.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 4.

In the figure, 1 is the top plate of the desk, 2 is a pair of left and right legs that are attached to the bottom surface of the top plate 1, and the legs 2 are formed into a loop shape using pipe material. A plurality of bolt holes 3 are provided in this girder-shaped portion 2a.

The top plate 1 has a hollow double-walled structure by blow molding, and a groove 4 is provided in the lower surface of the top plate 1 in which the entire length of the girder-shaped portion 2a of the leg 2 is fitted. This groove 4 is deep enough to bury more than 1/2 of the cross-sectional shape of the girder-shaped part 2a of the leg 2, and a plurality of grooves that fit into the groove 4 are provided at a plurality of locations on the edges on both sides of the groove 4. A plurality of pairs of protrusions 7 are provided by undercut molding to interfere with the cross-sectional shape of the girder-shaped portion 2a. Further, as described above, this groove 4 is designed to embed and fit the entire length of the girder-like part 2a, but the end shape of this groove 4 is the same as the side end shape of the girder-like part 2a. , are designed to fit tightly together in this part. Further, the groove 4 is provided with a dotted weld portion 5 welded to the upper plate for reinforcement, and an insert nut 6 is integrally formed at the bottom of the groove 4 and at a position corresponding to the bolt hole 3 of the leg 2. embedded in.

In the above configuration, each of the pair of legs 2 has its girder-shaped portion 2a embedded in the groove 4 of the top plate 1, and the bolt 8 is inserted into the bolt hole 3 of the pair of legs 2, and then screwed into the insert nut 6 on the top plate 1 side. By combining the top plate 1
can be attached to. At this time, the digit part 2a of the leg 2
is inserted into the groove 4 while pushing out the protruding portion 7 protruding from the edge of the groove 4, and is tightly fitted into the groove 4. Further, the longitudinal end portion thereof is abutted and fitted to the end portion of the groove 4,
It is positioned in its longitudinal direction and held firmly in this longitudinal direction.

[Effect of idea]

According to the present invention, the support can be attached to the top plate 1 side of the girder-shaped portion 2a of the leg 2 without using a bracket, and the number of parts and assembly steps can be reduced. Further, the entire length of the girder-like portion 2a of the leg 2 fits into the groove 4, and at this time, more than half of the cross-sectional shape of the girder-like portion 2a is buried, and the edges on both sides of the groove 4 It is firmly held by the protrusion 7 provided in the groove 4, and by being fitted in contact with the end of the groove 4 in the longitudinal direction, it is also firmly held in the longitudinal direction, and when fitted, This provides longitudinal positioning action, making positioning easier during bolt tightening.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention. Figure 1 is an enlarged sectional view showing the main parts, Figure 2 is a sectional view taken along the - line in Figure 1, and Figure 3 is a top view. A plan view showing the bottom surface of the board, Figure 4 is an overall perspective view of the desk, Figure 5
The figure is a sectional view showing a conventional example. 1 is the top plate, 2 is the leg, 2a is the girder, 3 is the bolt hole, 6 is the insert nut, and 8 is the bolt.

Claims (1)

[Scope of utility model claims] The girder-shaped part 2a of the leg 2 is inserted into the groove 4 provided on the lower surface of the top plate 1.
This girder-like part 2a is fitted tightly into the insert nut 6 embedded in the bottom of the groove 4 with a bolt 8 that passes through the bolt hole 3 provided in the girder-like part 2a of the leg 2. In a desk designed to be fixed, the groove 4 is made deep enough to bury at least 1/2 of the cross-sectional shape of the girder-like part 2a of the leg 2, and the girder-like part 2a is attached to the edges on both sides of the groove 4. A protrusion 7 that interferes with the cross-sectional shape of the groove 4 is provided in a protruding manner, and the length of the groove 4 is made equal to the length of the girder-like part 2a of the leg 2, and the side end of this girder-like part 2a is attached to the end of the groove 4. A desk characterized by abutting fit.