JPH0543152Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a double floor structure. More specifically, it is constructed in a room where electronic computers, office automation equipment, etc. are installed, and consists of a floating floor supported on the foundation floor surface, and the height adjustment mechanism of the floor panel that makes up the floating floor is adjusted between the pedestal and the floor panel. Concerning improvement of double floor structure provided between.

(Prior Art and Problems Thereof) A conventional double floor structure in which a height adjustment mechanism for a floor panel is provided across a base and a floor panel is disclosed, for example, in Japanese Utility Model Application Laid-Open Publication No. 61-52029.

In this conventional double floor structure, as shown in Fig. 4, a pedestal D is provided on a support bracket B erected on a foundation floor F, and a corner of a floor panel P' that constitutes a floating floor P is attached to the pedestal D. The floating floor P is mounted on the foundation floor F by being mounted via the height adjustment mechanism A.

The height adjustment mechanism A consists of an adjustment hole Aa opened in the corner of the floor panel P', and a nut Ab coaxial with the adjustment hole Aa and fixed to the floor panel P' section below the adjustment hole Aa. , and an adjustment screw Ac that is screwed into this nut Ab and comes into contact with the pedestal D.

In this height adjustment mechanism A, a tool H such as a screwdriver is inserted from above the adjustment hole Aa, and the adjustment screw Ac is rotated. The heights of adjacent floor panels P' can be adjusted by varying the distance between them.

In a double-floor structure equipped with such a height adjustment mechanism A, the adjustment screw AC may unexpectedly rotate and loosen due to the effects of walking pressure acting in random directions or shaking during an earthquake. There is a problem in that the setting level of the floor panel P' that has been set is incorrect.

(Purpose of the invention) The invention was made in order to solve the above-mentioned problems, and its purpose is to provide a screw portion that adjusts the height of the height adjustment mechanism provided between the pedestal and the floor panel. To provide a double floor structure in which the floor panel level does not fluctuate by preventing unexpected rotation of the floor panel.

(Structure of the invention) In order to achieve the above-mentioned purpose, the double floor structure according to the invention is provided with a pedestal attached to a supporting metal fitting erected on the base floor surface, and each part forming a cross-shaped panel contact part in plan view. In a double floor structure in which the corner of the floor panel is supported by a height adjustment mechanism provided across the same floor panel and the pedestal, and a floating floor is mounted on the foundation floor surface, the height adjustment mechanism of the floor panel is , a plurality of adjustment screws having heads that come into contact with the lower surface of the corner of each floor panel and screwed into the pedestal, adjustment holes opened in each floor panel part above the adjustment screws, and the upper surface of the conventional adjustment screw. and an operating groove provided facing the adjustment hole, further comprising a loosening mechanism for the adjustment screw in the height adjustment mechanism, the loosening mechanism being formed at the bottom of the operating groove. It consists of a screw groove that is smaller than the operating groove, a tightening screw that is screwed into the screw groove, and a locking surface that is stepped on the inner peripheral surface of the adjustment hole and locks the head of the tightening screw. The gist is that.

(Function) According to the above configuration, the level of each floor panel is set by inserting a tool from above the floor panel into the operating groove through the adjustment hole and rotating each adjustment screw individually to adjust the height of each floor panel. After that, pass the tightening screw that is screwed into the threaded groove at the bottom of each operating groove through the adjustment hole, and tighten until the head of the tightening screw comes into close contact with the locking surface stepped on the inner circumferential surface of the adjustment hole. By rotating the screws with a tool, the head of each adjustment screw is pulled in a direction that strengthens the contact force with each floor panel, and the screwing force between the adjustment screw and the pedestal is strengthened, thereby achieving the above-mentioned reinforcement. The cooperation between the contact force and the screwing force prevents the adjustment screw from becoming unintentionally loosened.

(Example) The following is a first example of the double floor structure according to the present invention.
This will be explained based on FIGS.

In this embodiment, a pedestal 2 is provided on a support fitting 1 erected on a foundation floor surface F, and the corners of each floor panel 3 forming a cross-shaped panel contact portion in plan view are connected to the same floor panel 3.
A floating floor P is mounted on a foundation floor F while being supported by a height adjustment mechanism 4 provided across the base and the pedestal 2.

The support fittings 1 are arranged in a grid pattern, and are located below the center of the corner of the floor panel 3, which is also arranged in a grid pattern.

This support fitting 1 consists of a base plate 11 and legs 12.

The substrate 11 is fixed to the base floor F by any desired means such as adhesive or anchor screws.

The leg body 12 is erected with its lower end fixed to the base plate 11 by welding or the like.

The pedestal 2 is integrally provided at the upper end of the leg 12 of the support fitting 1 so as to have a T-shape when viewed from the front, and its planar shape is rectangular.

This pedestal 2 has four insertion holes 21 formed at its four corners at an angle of 90 degrees.
A nut 22 is coaxially fixed to the lower side of 1 by welding or the like.

A large number of floor panels 3 are laid to form a floating floor P, and the planar shape is rectangular.

This floor panel 3 consists of a core body 31 made of a material such as cement, GRC, FRP, etc., and a metal plate 32 lined on the lower surface of the core body 31.

A height adjustment mechanism 4 for the floor panel 3 is provided between the pedestal 2 and the floor panel 3.
It consists of a nut 22 fixed coaxially to the insertion hole 21, an adjustment screw 41, and an adjustment hole 42.

The adjustment screw 41 includes a threaded portion 41a that is inserted into the insertion hole 21 of the pedestal 2 and screwed into the nut 22, and a flat head 41 provided on the top of the threaded portion 41a.
b, and an operation groove 41c with a polygonal planar shape dug in the upper surface of the head 41b.

The adjustment hole 42 is provided at a position corresponding to the insertion hole 21 of the base 2, and the adjustment hole 42 is provided at a position corresponding to the insertion hole 21 of the pedestal 2.
1. A hole is opened to communicate with the metal plate 32.

In such a height adjustment mechanism 4, a tool such as a wrench is inserted from the adjustment hole 42 into the operation groove 41c of the adjustment screw 41.
, and rotate the adjustment screw 41.

When this operation is performed, the adjustment screw 41 moves up and down, and its head 41b contacts the lower surface of the floor panel 3, causing the floor panel 3 to move up and down, making it possible to adjust the height of adjacent floor panels 3. .

The locking mechanism 5 for the adjustment screw 41 in the height adjustment mechanism 4 includes a tightening screw 51, a locking surface 52, and a thread groove 53.

The tightening screw 51 is bolt-shaped, and the screw shaft portion 51
a, a flat head 51b, and an operation groove 51c on the top surface of the head 51b.

The locking surface 52 is formed into an annular shape in plan view by expanding the upper region of the adjustment hole 42 to a large diameter.

The screw groove 53 is recessed in the axial direction at the center of the bottom of the operating groove 41c of the adjustment screw 41 and is smaller than the operating groove 41c.

In such a locking mechanism 5, the tightening screw 51 is inserted into the adjustment hole 42, and a tool H such as a screwdriver is hooked onto the operating groove 51c of the tightening screw 51.
Rotate 1.

According to this operation, the screw shaft portion 5 of the tightening screw 51
1a is screwed into a screw groove 53 formed in the adjustment screw 41, and the flat head 51b presses and locks the locking surface 52, so that the adjustment screw 41 is pulled toward the floor panel 3 side. The head 41b is attached to the floor panel 3.
The screw portion 41a is brought into close contact with the back surface of the screw portion 41a, and the screwing force between the screw portion 41a and the base 2 (specifically, the nut 22) is increased.

Therefore, the adjustment screw 41 will not rotate unexpectedly, and the height of the floor panel 3 will not fluctuate.

(Effects of the Invention) Since the present invention is configured as described above, loosening of the adjustment screw in the height adjustment mechanism is prevented, and the set floor panel level can be maintained.

Moreover, like the height adjustment mechanism, the locking mechanism can be easily operated without removing the floor panel from above, and has good operability.

In addition, instead of using one tightening screw to prevent loosening of the adjustment screw by bringing the adjustment screw close to the floor panel and increasing the screwing force of the adjustment screw to the pedestal, four screws corresponding to each floor panel are used. By dispersing the repulsive stress with the actual tightening screws, the repulsive stress acting on each tightening screw is suppressed to a small level.
This solves the problem of the tightening screw buckling or the screw thread collapsing due to long-term use, and it is possible to construct a locking mechanism with excellent durability.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the double floor structure according to the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a sectional view showing the construction state of Fig. 1, and Fig. 4 is a sectional view showing an embodiment of the double floor structure according to the present invention. FIG. 2 is a sectional view showing a conventional example. 1... Support metal fittings, 2... Pedestal, 3... Floor panel, 4... Height adjustment mechanism, 5... Loosening mechanism, 4
1...Adjustment screw, F...Foundation floor surface, 42...Adjustment hole, P...Floating floor, 41c, 51c...Operation groove, 5
3... Thread groove, 51... Tightening screw, 52... Locking surface, 41b... Head of adjustment screw, 51b... Head of tightening screw.

Claims (1)

[Scope of utility model registration request] A pedestal is installed on a supporting metal fitting erected on the foundation floor, and a height adjustment mechanism is installed between the corner of each floor panel that forms a cross-shaped panel contact part in plan view, and extends between the same floor panel and the pedestal. In a double floor structure in which a floating floor is supported and placed on a foundation floor surface, the height adjustment mechanism of the floor panel is controlled by a plurality of screws screwed into the pedestal, each having a head that abuts the lower surface of the corner of each floor panel. The height adjustment mechanism comprises an adjustment screw, an adjustment hole opened in each floor panel portion above the adjustment screw, and an operation groove provided on the top surface of the adjustment screw facing the adjustment hole, and further includes the height adjustment mechanism. a screw groove formed at the bottom of the operating groove and having a smaller size than the operating groove, and a tightening screw screwed into the screw groove; A double floor structure comprising a locking surface that is stepped on the inner circumferential surface of the adjustment hole and locks the head of the tightening screw.