JPH01125459A - Structure of common joist - Google Patents

Abstract

PURPOSE: To easily and accurately install floor joists and to reduce the construction cost and term by integrally assembling the floor joists and support legs beforehand before fixing a support base to a foundation floor. CONSTITUTION: Before fixing a support base 1 to a foundation floor 4, a lot of support legs 2 are assembled to floor joists 3 at appropriate intervals and bottom parts 11 in contact with the foundation floor 4 are fixed after the assembling. A floor slab 5 is laid across the adjacent floor joists 3, 3 and a wiring space is formed between the foundation floor 4 and the floor slab 5. The floor slab 5 has its lower edge supported by a flange 33 of each floor joist 3 and its upper face flush with the crown part 32 of the floor joists 3. A space between the foundation floor 4 and the floor slab 5 is wired and after the wiring, finishing boards are laid on the whole face of the floor slab 5 group to complete the construction.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to the structure of a joist used to provide a wiring space under a floor.

<Conventional technology> With the spread of office automation, various office automation machines (hereinafter referred to as rOA equipment) are currently being used.
The wiring space is required under the floor considering the landscape.

Further, it is considered desirable for this type of floor to have a structure in which the floorboards can be partially attached and detached in order to not only simply bury the wiring in the floor but also to replace or inspect the wiring.

Based on these demands, a floor structure as shown in FIG. 10 is currently being proposed.

To explain the structure of the floor based on the drawings, a is a rectangular plate with bolts attached to the adjustable leg, b is a support plate that is screwed onto the adjustable leg a, and C is a joist with a roughly hat-shaped cross section. There are many holes on the top.

d is the floorboard that passes between the adjacent joists c and c.

After installing a large number of adjusting legs a in a straight line in the penetrating direction of the drawing on the foundation floor e, joists C are mounted on the group of adjusting legs a arranged in a straight line, and then joists c, c It is constructed by passing the floor plate d between them, and the space formed between the foundation floor e and the floor plate d is used for wiring.

<Problems to be Solved by the Present Invention> The conventional floor structure described above has the following problems.

(B) During actual construction, in order to arrange a large number of adjusting legs a according to the linearity of the joist C, accurate marking and accurate installation of each adjusting leg a are required.

Therefore, installing the adjustment leg a requires a lot of effort and is troublesome.

(b) Due to the relationship between setting joist C on adjustment leg a on site,
The height of the support plate must be adjusted by turning the bolts of each adjusting leg a to match the unevenness of the surface of the foundation floor.

All of this series of work relies on the manual labor of workers, so there are problems in that the construction time is long, it is labor intensive, and the construction costs are high.

(c) Also, as mentioned above, since the series of work to assemble the floor on site relies on workers, there remains a problem in terms of reliability.

OBJECTS OF THE INVENTION The present invention was made in view of the above points, and an object of the present invention is to provide a joist structure that has excellent workability and can reduce construction costs.

Structure of the Present Invention> Hereinafter, an embodiment of the present invention will be described with reference to the drawings, but first, the constituent members of the floor will be described.

(a) Support base The support base 1 has two rod-shaped support legs 2 as shown in Figure 1.
It is a plate body for positioning the parts together, and is formed by bending a steel plate or the like.

The support base 1 consists of a bottom part 11, a back part 12 extending at right angles from the bottom part 11, and shelf boards 13 formed on both sides of the back part 12 extending in the same direction as the bottom part 11.
Attach using bolts, adhesive, etc., in contact with the

Each shelf board 13 has a hole 14 on its plate surface, and the support leg 2 is inserted into this hole 14 from below to support each shelf board 13.

In this embodiment, a case will be explained in which the shelf boards 13 are provided on both sides of the support base 1 in two stages (upper and lower), but it is of course possible to have more than that. Any structure that can prevent and support this is fine.

Further, the lower shelf board 13 is formed at a higher position than the bottom part 11 in consideration of the thickness of the head of the support leg 2.

Note that the distance between the centers of both holes 14 at both ends of the support base l is determined according to the length of the floorboard 5 to be constructed.

(b) Support leg The support leg 2 is a rod for the purpose of supporting the joist 3, and has a threaded portion 21 on its upper half circumferential surface, and the top part applies a rotational force to the support leg 2 from the outside. It has a notch 22 for

In addition, in consideration of the stability of the support leg 2, the support plate 23 is rotatably attached to the lower end of the support leg 2 as shown in FIG. 5, or the contact surface of the support plate 23 with the foundation floor 4 is It is also conceivable to attach a cushioning material such as rubber to the I12 to provide a soundproofing function.

(c) The joist 3 is a member that supports the floorboard 5 from below, and is formed by bending a steel plate or the like to have a substantially hat-shaped cross section.

That is, the joist 3 is composed of opposing vertical webs 31, a top portion 32 communicating between the upper portions of the vertical webs 31.31, and a flange 33 extending horizontally outward from the lower portion of each vertical web 31.31, The top portion 32 has a large number of elongated holes 34 in the longitudinal direction.

In addition, since the nut 6 is housed in the downward space formed between the vertical webs 31.31 in a state where it is prevented from rotating and falling off, the facing distance of the vertical webs 31.31 is
Match the diameter of

In order to house the nut 6 in the joist 3, the nut 6 is fixed, for example, by forging the outside of the vertical web 31, 31, or by welding, adhesive, or the like.

The work of fixing the nut 6 is done at the factory or on site.

Moreover, as other joists 3, those having various cross-sectional shapes as shown in FIGS. 9a to 9d, for example, can also be used.

The joist 3 illustrated in FIGS. 9a to 9d has a shape that emphasizes strength, and is used by housing a bolt 6 (not shown) in the space between the vertical webs 31, 31 so that it does not fall out.

(d) Floor board The floor board 5 can be made of conventional concrete, wood, steel, or one with a heating function or air conditioning function. A flooring material in which the upper edge of the floorboard 5 is formed to protrude like an eave can also be used.

The thickness of the floorboard 5 is formed to be equal to the height of the vertical web 31 of the joist 3, and care is taken so that the frame is passed between the joists 3 and 3 so that no step is created.

(A) Assembling of support legs and joists (Figure 2) In the present invention, before fixing the support base 1 to the foundation floor 4, a large number of supports #2 are introduced to the joists 3 at appropriate intervals. Leave it on.

That is, the support leg 2 is inserted into each shelf board 13 of the support base 1, the threaded portion 21 of each support leg 2 is screwed into the nut 6 of the joist 3, and the support leg 2 is assembled to the joist 3.

In order to mount the fixed-sized support base 1 between two joists 3.3 across a plurality of them, both joists 3.3 are arranged in parallel.

The work of assembling the 2 groups of support legs to the joists 3 can be done at a factory before being delivered to the site, or at the site.

Further, when the joists 3 are long, the installation intervals between the foundation bases 1 may be widened, and only the supporting legs 2 may be provided alone in the middle.

In this case, a known support leg 2, such as a bolt with a pedestal, can be used as the support leg 2 provided in the middle of the joist 3.

(B) Leg length consistency - When assembling each support leg 2 to the joist 3, the length of each support leg 3, that is, the leg length from the flange 33 to the head of the support leg 2, is made uniform.

(C) Installation (Fig. 3) Hold both sides of the joist 3 to which a large number of support legs 2 have been assembled and place it on the foundation floor 4, and fix the bottom part 11 in contact with the foundation floor 4.

In the present invention, in order to fix the support leg 2, there is no need for accurate marking work as in the conventional method, and it is only necessary to mark the base Mg4- so that the positions of both ends of the joist 3 can be known.

The large number of groups of support legs 2 screwed onto the middle of the joists 3 are arranged in a straight line by the joists 3, so if both ends of the joists 3 are installed in accurate positions, the large number of support legs 2 located between them can be arranged in a straight line. Naturally, the groups are arranged with exact straightness, so that there is no need to individually align the large number of groups of support legs 2 to be arranged in the middle of the joist 3.

(d) Erection of floorboards (Fig. 4) The floorboards 5 are passed between adjacent joists 3 and 3, and a wiring space is formed between the foundation floor 4 and the floorboards 5.

The lower edge of the floorboard 5 is supported by the flange 33 of each joist 3, and the upper surface of the floorboard 5 is flush with the top part 32 of the joist 3.

The spacing between the floor joists 3 may be uniform, but if a combination of wide and narrow floor joists is used, narrow floor joists 5 may be laid during wiring changes or maintenance inspections.
When attaching and detaching, there is less influence on the OA equipment than when the floor plate 5 is wider, and the attaching and detaching operations can be performed more easily.

= 8 = (E) Fine adjustment of support legs The surface of the foundation floor 4 may have unevenness.

In such a case, insert a tool into the notch 22 at the top of the support leg 2 using the elongated hole 34 of the joist 3, and rotate the support leg 2 to finely adjust the length of the support leg 2. , the upper surface of the floorboard 5 is corrected to a flat surface as designed.

In addition, when constructing the foundation floor 4 with a smooth surface, it is possible to use the joist 3 without the elongated holes 34-.

Kube) Wiring work Wiring is performed within the space between the foundation floor 4 and the floorboard 5.

Once the wiring is completed, a finishing material such as carpet is laid over the entire surface of the five groups of floorboards to complete the construction.

Other Examples> In addition to the housing structure in which the nut 6 is housed in the joist 3 described above, the following housing structure may also be adopted.

Incidentally, the same parts as those in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted.

[Structure Example 1] (FIG. 6) For example, a structure may be adopted in which the nut 6 is housed in the holder 7 having a U-shaped cross section without falling off and is inserted into the opening of the joist 3.

The holder 7 can be fixed to the joist 3 by welding, but if the vertical webs 31 and 31 of the holder 7 and the joist 3 are provided with irregularities as shown in the figure, the joist 3 and the holder 7 can be attached and detached as necessary. .

[Structure Example 2] (Fig. 7) A screw hole 8 is formed in a rectangular body 8 of a size that can be accommodated in the opening of the joist 3.
1 may be established.

The rectangular body 8 is formed of rigid resin, metal, or the like, and is housed in the joist 3 using known fixing techniques (4.j) such as adhesion, welding, and fitting of irregularities so that it does not fall off.

[Structure Example 3] (Figure 8) In addition, a receiving plate 9 with a hole in the center is fixed to the lower surface of the flange 33 of the joist 3 by welding or the like, and a nut 6 is fixed to the upper surface of this receiving plate 9. structure can also be adopted.

The receiving plate 9 is partially fixed to the neck ball of the joist 3, or is fixed to the entire length of the joist 3.

When the receiving plate 9 is fixed over the entire length of the joist 3, the strength of the joist 3 is increased.

It is also conceivable to directly carve a screw into the receiving plate 9 instead of the nut 6.

Effects of the Present Invention> Since the present invention is as described above, the following effects can be expected.

(a) With the present invention, there is no need to install the support legs one by one on the foundation floor while checking their linearity as in the past, but it is sufficient to simply assemble the joists and support legs together in advance and install them on the foundation floor. (Easy to install.

Therefore, construction costs can be reduced and the construction period can be significantly shortened.

(b) By simply screwing the support legs onto the joists, the support leg groups can be arranged in an accurate straight line.

[Brief explanation of the drawing]

Figure 1: An explanatory diagram of an embodiment of the present invention, a perspective view of a floor with a portion cut away. Figure 2: An explanatory diagram of how the support legs and joists are assembled. Figure 3: The support legs and floor joists are assembled. An explanatory diagram when arranging the joists assembled together on a foundation floor. Figure 4: An explanatory diagram when installing floorboards on the joists. Figure 5: An explanatory diagram showing another example of support legs, showing the lower part of the support legs. Enlarged view of Figure 6: Illustration of other accommodation techniques for joists and nuts Figure 7:
An explanatory diagram of another accommodation technique using a rectangular body. Figure 8: An explanatory diagram of another joist and support leg connection structure using a receiving plate. Figures 9a to 9d: Side view of another joist. Figure 10: Conventional. Technology illustration

Claims (1)

[Scope of Claims] A joist that is screwed and supported by a support leg having a threaded portion on its circumferential surface, which has a substantially hat-shaped cross section and has a downward opening in its longitudinal direction; A structure of a joist having flanges on which floorboards are placed on both sides of the joist, wherein a nut is accommodated in the opening without falling out.