JP2004076576A - Strut in double floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strut in a double floor capable of separating a nut screwed to a screw shaft from a nut holder for holding a floor board to combine them by a simple operation in order to screw a nut body supporting the floor board to the screw shaft erected from a foundation floor. <P>SOLUTION: Four screw shafts are erected on a contact plate set on the foundation floor, and the strut on the double floor supporting each corner of the floor board collected by each nut body screwed to each screw shaft is provided. The strut in the double floor comprises the nut for screwing the nut body to the screw shaft and the nut holder formed of a pocket provided to an introduction way inserting the nut from the horizontal direction and provided at the backside the introduction way to hold so as to make the nut impossible to rotate and to vertically move and an insertion hole passing through the pocket to vertically insert the screw shaft. <P>COPYRIGHT: (C)2004,JPO

Description

TECHNICAL FIELD The present invention relates to a column supporting a floor plate in a double floor in which a floor plate is laid at a predetermined height from a base floor and a required space is secured between the floor plate and the base floor.

In this type of double floor, the floor plate is supported on the foundation floor by a column, and the column has a fixed type in which the height formed by one individual (some are integrated with the floor plate) is fixed, There is an adjustable type in which the height can be adjusted by rotating an upper portion on which a floor plate is placed and a lower portion which is grounded on a foundation floor using screws or the like. Of these, the adjustable type is expensive and requires an adjustment operation, but it is suitable for absorbing unevenness, so it can be installed on a relatively uneven foundation floor or a large-area foundation floor. It is often used when constructing floors.

Furthermore, as for the adjustable type, one (or one) column type that supports the corners of the four floor panels to be assembled together with one column, and a four column type that supports the floor panels individually There is. The former is inexpensive and easy to adjust. However, it is impossible to adjust each floor individually since the four floors move in the same manner. Therefore, when strict and high-precision adjustment is required, a four-post type is used.

For this type, four screw rods are erected on the ground plate fixed or installed on the foundation floor, and individual nuts are screwed onto these screw rods, and each of the floor plates assembled with each nut is assembled. There are many configurations that support the corners. In this case, the nut body is often formed of a synthetic resin or the like in consideration of the cushioning property with the floor plate. However, forming a screw directly on such a nut body is inferior in strength, and the molding itself is costly. It takes. Therefore, as shown in Patent Document 1 below, the nut body is constituted by a metal nut and a resin nut holder that holds the metal nut.
JP 2001-49855 A

However, since the above-mentioned prior art example forms a similarly hexagonally formed pocket for accommodating a hexagonal nut at the lower end of the nut holder, and lowers the nut holder from above to accommodate the nut in the pocket, There is a case where the positional relationship between the angle of the nut and the angle of the pocket is not known, and the insertion cannot be performed unless the operation is repeated many times. Further, since the nut holder is not restricted at all from coming out above the nut, it may come out upward by vibration or the like to lift the floor plate. Thus, the present invention is such that the nut and the nut holder can be integrated by a simple operation, and the relative vertical movement is restricted.

In view of the above problems, the present invention provides a floor plate according to claim 1 in which four screw rods are erected on a ground plate placed on a foundation floor and assembled by respective nut bodies screwed to individual screw rods. In the post on the double floor that supports the corners, this nut body is screwed to the threaded rod, the nut is inserted laterally, and the nut is provided at the back of the channel and the nut cannot be rotated. And a nut holder having a nut holder formed with a pocket for holding vertically immovable, and an insertion hole for penetrating a screw rod vertically through the pocket. It is.

In addition, the present invention provides a configuration in which a slit groove is formed on a side surface below a pocket of a nut holder so that a screw rod can pass through an insertion hole, and a nut described in claim 3. Provided is a configuration in which the outer periphery above the pocket of the holder is made larger in diameter to be a seat portion for supporting the floor plate, and the outer periphery above the seat portion is made smaller in diameter so as to be an insertion portion to be inserted into a through hole of the floor plate.

According to the first aspect of the present invention, the mounting of the nut holder on the nut is insertion from the lateral direction by the introduction path formed on the side surface of the nut holder, so that the state can be visually observed, and only one operation is required. Can be inserted reliably. In addition, since the nut is housed so as not to be able to move up and down with respect to the pocket, the nut and the nut holder are integrated, and even if there is vibration or the like, the nut holder does not come out of the nut and the floorboard does not rise upward. .

According to the means of claim 2, since the nut and the screw rod can be taken into the nut holder under a state where the nut is screwed on the upper part of the screw rod, the operation is reliable and quick, and further, the subsequent screwing operation (Descent of the nut holder) is easy and quick because the nut holder only needs to be rotated. Further, according to the means of the second aspect, the support of the floorboard is reliably and easily performed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a double-floor structure according to the present invention, and FIG. 2 is a cross-sectional view of a state in which a floor plate is laid on a basic floor by pillars constituting the double-floor structure. The support 2 is constituted by a support 2 placed on the support 1 and a floor plate 3 supported by the support 2, and the support 2 includes an upper support 4 and a lower support 5. The pillar lower part 5 is formed by arranging four screw rods 8 in a square arrangement from a grounding plate 7 formed of a square flat plate with elastic shoes 6 put on its corners.

FIG. 3 is a perspective view of the upper column 4 and the lower column 5 of the column, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3. The upper column 4 of the column is a nut body 4 that is screwed to a screw rod 8. The nut body 4 is composed of a metal hexagonal nut (hereinafter referred to as a nut) 9 directly screwed to the screw rod 8 and a resin-made nut holder 10 for holding the nut 9 in a non-rotatable manner. The nut holder 10 has an introduction path 12a near the middle thereof into which the nut 9 can be inserted from the side, a pocket 12b extending deep into the introduction path 12a and accommodating the nut 9 in a non-rotatable manner, and penetrating through the pocket 12b. An insertion hole 13 through which the screw rod 8 is inserted vertically is formed. A slot 11 is formed on the side of the nut holder 10 below the pocket 12b so that the screw rod 8 can be inserted and removed from the side through the insertion hole 13.

The outer periphery of the nut holder 10 near the upper portion of the pocket 12b is formed to have a large diameter, and has a small diameter in the middle and continues upward. The boundary between the large-diameter portion and the small-diameter portion is formed as a flat step and is a seat portion 14 for receiving the floor plate 3, and the small-diameter portion is directly continued upward and is provided at a corner of the floor plate 3. The insertion portion 15 is inserted into the through hole 26. Further, the diameter of the lower portion of the seat portion 14 is also enlarged, and the annular fin 16 is projected upward so that the upper end thereof is located above the seat portion 14. These support the floorboard 3, the details of which will be described later.

The nut 9 (upper column) and the lower column 5 are assembled as described above. The nut 9 screwed to the upper end of the screw rod 8 is inserted from the introduction path 12a into the pocket 12b, and the screw rod 8 is inserted through the slot groove 11. Each of the holes 13 is taken in from the lateral direction. Next, the nut holder 10 is rotated so that the lower end thereof is in contact with the bottom of the screw rod 8 (so that the upper part of the insertion hole 13 has a margin with respect to the upper end of the screw rod 8 so that this is possible). It is). At this time, the seat portions 14 of the nut holders 10 are aligned at positions that are raised by a predetermined length from the lower surface of the ground plate 7. When this state is reached, the nut body (upper column) 4 and the lower column 5 It is said that was initialized. In this regard, if the slot 11 is formed in the nut holder 10, the nut 9 and the screw rod 8 can be easily taken in.

FIG. 5 is a sectional view of a double-floor structure showing another example of the screw rod 8 described above. In this example, a portion below the pocket 12b of the nut holder 10 is eliminated, and a screw corresponding to this is removed. A screw is not formed in the rod 8 portion, and a flange portion 8a is provided at the upper end with which the lower end of the nut holder 10 contacts in an initial setting state. Since the upper half requires the screw, the cost required for forming the screw is reduced. However, since the diameter of the lower portion can be increased, the rigidity can be increased. In addition, in this embodiment, a loosening prevention structure is provided between the nut holder 10 and the screw rod 8.

FIG. 6 is a perspective view of the screw rod 8 and the nut holder 10 showing the loosening prevention structure, and FIG. 7 is a cross-sectional view taken along the line BB of FIG. 6, where the inner periphery of the insertion hole 13 of the nut holder 10 below the pocket 12b. On a part of the surface (three places at a pitch of 90 degrees), projections 17 that partially bite into the screws of the threaded rods 8 are formed, so that even if vibration is applied to the floor plate 3 or the like, the nut 9, that is, The nut holder 10 is prevented from rotating and moving up and down. Note that the nut holder 10 shown in FIG. That is, in addition to the inner peripheral surface of the insertion hole 13 below the pocket 12b, two upper and lower portions of the inner peripheral surface at the lower end are strongly contacted with a non-contact portion provided therebetween, and the looseness is prevented by pressing these two locations. -ing In addition, an engagement hole 18 with which a hexagon wrench or the like can be engaged is formed in a portion where the upper end of the screw rod 8 is left above the upper end of the nut holder 10. Further, the outer periphery of this portion is also formed in an engaging portion 19 such as a hexagon, so that a rotating tool different from the engaging hole 18 can be engaged.

A connection plate 20 that fits and connects to the nut holder 10 at the diagonal position is laid over the nut holder 10. The connecting plate 20 has holes 21 formed at both ends. Prior to the nut 9 being taken in from the slit groove 11 of the nut holder 10, the connecting plate 20 is inserted into the screw rod 8 at a diagonal position with the holes 21. After that, the nut holder 10 is inserted into the nut holder 10 from the lower end thereof. At this time, the ascending of the connecting plate 20 is restricted by the large-diameter portion below the fin 16 after climbing over the minute projection protruding from a part of the outer peripheral surface of the nut holder 10 so that the connecting plate 20 does not come off from the nut holder 10. It has become. At the center of the connecting plate 20, a bolt 22 is provided so as to protrude upward, and a floor plate retainer 27 described later can be screwed into the bolt 22.

Next, a method of constructing a double floor with the double floor having the above configuration will be described. FIG. 8 is a plan view of the column 2 in a state where the connecting plate 20 is hung over the nut holder 10, FIG. 9 is a cross-sectional view taken along the line CC of FIG. 8, and FIG. 10 shows a state in which the floor plate 3 is placed on one of the nut holders 10. First, the nut body (upper column) 4 and the lower column 5 are initially set, and the column 2 in a state where the connecting plate 20 is hung over the nut holder 10 at the diagonal position is placed in the construction area. Prepare as many as necessary.

By the way, according to this initial setting, the seat portion 14 formed on the nut holder 10 has a minimum height from the base floor 1 and is adjusted to the designed floor height. In this respect, it can be said that the support column 2 is based on lowering the ground plate 7, that is, adjusting the floor height to be higher (of course, it is also possible to adjust the floor height to be lower). Is possible). When the above-described support 2 is prepared, the support 2 is placed in accordance with the position of the center of the corner of the floor panel 3 where the center of the support 2 is assembled.

Next, the floor plate 3 is placed on the seat portion 14 formed on the nut holder 10, and the floor plate 3 used for this double floor is caulked by securing a space between the upper plate 23 and the lower plate 24. A low step portion 25 having a cut-out protruding end is formed in a corner, and a through hole 26 is formed near the center thereof so as to penetrate vertically in accordance with the position of the nut holder 10. Therefore, the operation of inserting the through hole 26 into the insertion portion 15 of the nut holder 10 (the bottom surface of the lower plate 24 is supported by the seat portion 14 at this time) is performed on all four floor plates 3. When the floor plate 3 is lowered, the fins 16 reduce the impact, and even if the floor plate 3 described later is loosely tightened and rattles on the seat portion 14, the rattle is absorbed. And no sound is generated.

After this state, the floor plate holder 27 is inserted into the circular low step portion 25 at the corner of the floor plate 3, and the screw (female screw) formed on the floor plate holder 27 is inserted into the bolt 22 provided on the connection plate 20. The connecting plates 20 are screwed together, pulled upward until the connecting plate 20 hits the bottom surface of the seat portion 14, and each floor plate 3 is tightened and fixed to the connecting plate 20. Since an engaging hole 27a is appropriately formed on the upper surface of the floor plate retainer 27, a rotary tool or the like may be engaged with the engaging hole 27a and tightened. At this time, it goes without saying that the floor plate presser 27 is inserted into the low step portion 25 with almost no gap, and the upper surface after fastening is set to be flush with the upper surface of the floor plate 3.

FIG. 11 is a cross-sectional view showing the state of the double floor after performing the above operation. If there is irregularity in the base floor 1, a part or all of the ground plate 7 is floated from the base floor 1. A portion of the pillar 2 is generated. If the floor plate 3 is firmly fixed to the column 2 without fixing the ground plate 7 to the foundation floor 1, the floor plate 3 is connected as if it were a single object, and each floor plate 3 is given rigidity. However, even if a gap is formed below the ground plate 7, the floor plate 3 does not fall. If the gap between the base floor 1 and the ground plate 7 is left as it is, the floor plate 3 sinks or makes a sound every time walking, so that the ground plate 7 is lowered and landed. Is required.

Then, the nut holder 10 corresponding to the place where the grounding plate 7 floats is searched out (the floor plate 3 is easily lowered when it is put on the nut holder 10), and the engaging hole 18 (or the engaging portion 19) is formed with the rotating tool 28. It may be rotated and lowered until the ground plate 7 lands on the base floor 1. At this time, if the shape of the engagement hole 27a of the floor plate retainer 27 and the shape of the engagement hole 18 of the nut holder 10 are made the same, the same tool can be used. This operation may be performed for all the nut holders 10 or may be performed for some of the nut holders 10, depending on how the gap below the ground plate 7 is formed.

The structure of the floor plate retainer 27 in FIG. 5 is different from that of the floor plate retainer 27 in FIG. That is, the floor plate retainer 27 is formed with a cam 27b which gradually increases in the circumferential direction at the tip thereof, and a hole 29 is formed in a portion of the connecting plate 20 where the bolt 22 is present, A cam surface 29a for receiving the cam 27b is formed around the back surface of the hole 29. Since the cam 27b must pass through the hole 29, it is sufficient that both are formed in a rectangular shape or the like so that they can pass only when their shapes match. According to this, since it is not necessary to rotate the floor plate retainer 27 many times, there is an advantage that the tightening operation becomes easy.

The above is the basic embodiment of the present invention, but may be variously modified. One of them is a method of rotating a screw rod (not shown) described below. That is, the screw rod is rotatably attached to the ground plate, and an engagement hole is formed at the upper end of the screw rod so that the rotating tool can be engaged by an operation from above. Specifically, the lower end of the screw rod is fitted to the ground plate so that it cannot move in the axial direction, but the tolerance of the fitting part at this time is that even if the screw rod and the ground plate are not at a right angle, Make the screw rod rough enough to rotate.

According to this, if there is unevenness in the foundation floor, the screw rod will rotate, but at this time, the floor plate is strongly pressed against the seat and the frictional resistance is large, so the screw rod only depends on the weight of the grounding plate. Due to the low frictional resistance, the screw rod rotates preferentially, and the ground plate is lowered. According to the present example, there is an advantage that the operation force is small. If there is a possibility of slippage between the seat and the floor plate when a part of the grounding plate lands and the frictional resistance increases, the contact surface between the seat and the floor plate should be provided with non-slip such as unevenness. Just fine.

It is a perspective view of the double floor structure concerning the present invention. It is sectional drawing of the double floor structure which concerns on this invention. It is a perspective view of the support | pillar upper part and support | pillar lower part based on this invention. It is AA sectional drawing of FIG. It is sectional drawing of the double floor structure of another example which concerns on this invention. It is a perspective view of the support | pillar upper part and support | pillar lower part of another example which concerns on this invention. It is BB sectional drawing of FIG. It is a top view in the state where the connection board was hung over the nut holder concerning the present invention. FIG. 9 is a sectional view taken along the line CC in FIG. 8. It is a top view in the state where one floor board was put on a nut holder concerning the present invention. FIG. 2 is a cross-sectional view of a double floor structure according to the present invention in a state where irregularities have occurred.

Explanation of reference numerals

REFERENCE SIGNS LIST 1 foundation floor 2 support 3 floor plate 4 support upper 5 support lower 6 shoe 7 ground plate 8 screw rod 9 nut 8a engaging hole 10 nut holder 11 slot groove 12a introduction path 12b pocket 13 insertion hole 14 seat part 15 insertion part 16 fin 17 Projection 18 Engagement hole 19 Engagement part 20 Connection plate 21 Hole 22 Bolt 23 Upper plate 24 Lower plate 25 Low step portion 26 Through hole 27 Floor plate holder 27a Engagement hole 27b Cam 28 Rotary tool 29 Hole 29a Cam surface

Claims (3)

Four nut rods are erected on the ground plate placed on the foundation floor, and the nuts are supported on a double-floor column supporting the corners of the floor panel assembled by the nuts screwed to the individual screw rods. A nut to be screwed into the threaded rod, an introduction path for inserting the nut from the lateral direction, a pocket provided at the back of the introduction path to hold the nut so that it cannot rotate and cannot move up and down. A support on a double floor, comprising a nut holder having an insertion hole through which a screw rod is inserted up and down. The post according to claim 1, wherein a slot is formed in a side surface below the pocket of the nut holder so that the screw rod can pass through the insertion hole. 3. A seat for supporting a floor plate by increasing the outer circumference above the pocket of the nut holder, and an insertion portion for inserting the through hole of the floor plate by reducing the outer circumference above the seat to a small diameter. Posts on double floors.