JPH09310465A - Unit supporting leg and supporting bolt used for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a supporting bolt with good productivity and low cost in manufacture and sufficient strength in spite of a long size as being capable of constructing a double floor, excellent in sound insulation and damping effect and in tall floor height, in a well workable manner and a unit supporting leg using it. SOLUTION: A unit supporting leg has a floor contact base 1, a supporting bolt 10 standingly provided on the base in a rotationally movable manner and a supporting plate mounted via a level adjusting nut threaded to the upper part of the supporting bolt 10 in height adjustable manner. In such a case, the supporting bolt 10 is a hollow body with a center through-hole 15, consisting of a collar 11 expanded to the side and formed at the lower part, a screw 12 formed on the outer periphery upward of the collar 11 and a rotary tool engagement portion 14 formed at the top end. For factorable construction, the floor contact base 1 has a vertical through-hole 2 to insert the lower part of the supporting bolt 10 therein and a groove 5 formed on the lower face to be extended from the through-hole 2 to the outside surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit support leg and a support bolt used for the unit support leg, and particularly to construct a double floor by forming a space between an existing foundation floor surface in various buildings such as an apartment house. The present invention relates to a unit support leg that is preferably used for the above and a support bolt used for the unit support leg.

[0002]

2. Description of the Related Art Conventionally, as a device for supporting such a double floor, for example, Japanese Patent Laid-Open No. 17348/1991 or Japanese Utility Model Laid-Open No.
No. 116537 discloses a device for supporting a fixed-sized rectangular and / or square floor panel by a unit support leg composed of a rod-shaped leg and a receiving plate mounted on the upper end of the rod-shaped leg so as to be vertically adjustable. ing. An example of a conventionally known unit supporting leg is as shown in FIG. 10, and a floor contact base 10 made of a relatively hard elastic material such as rubber or synthetic resin.
2, a support bolt 104 that is rotatably erected on the base 102, a level adjusting nut 108 that has an annular support portion 109 that projects laterally in the outer peripheral substantially central portion, and a central portion at the central portion. It is composed of a square or rectangular support plate 110 having an insertion hole 111 into which the upper part of the level adjusting nut 108 is fitted.

[0003] The supporting bolt 104 is a ring-shaped flange 1 projecting laterally on the outer peripheral surface at a predetermined distance upward from the lower end.
05 is integrally provided, a screw portion is formed above the collar portion 105, and the base end portion 10 below the collar portion 105 is formed.
6 is formed in a round bar portion having a circular cross section. Further, a groove portion 107 is formed on the top end surface of the support bolt 104 to fit the tip of the rotating tool. And the support bolt 10
The base round bar portion 106 of 4 is the central hole 1 of the floor contact base 102.
03, the support bolt 104 is attached to the collar portion 1
05 is used as a support portion to be rotatably erected on the floor-contacting base 102. On the other hand, the upper portion of the insertion hole 111 of the support plate 110 is chamfered and expanded. The level adjusting nut 108 is fitted into the insertion hole 111 of the support plate 110, and then the upper part thereof is expanded and partially buried in the chamfered portion 112 of the support plate insertion hole 111, so that the level adjustment nut 108 is inserted into the support plate 110. Can be firmly attached. At the same time, an adhesive reservoir 113 is formed on the level adjusting nut 108. Note that one or several grooves are formed in the longitudinal direction on the inner peripheral thread of the level adjusting nut 108 or the outer peripheral thread of the support bolt 104 so that the adhesive easily flows.

In this way, the insertion hole 11 of the support plate 110
10 by screwing the upper end portion of the thread portion of the support bolt 104 into the level adjusting nut 108 fitted in FIG.
The unit support leg 101 is assembled as shown in FIG.
The double-sided pressure-sensitive adhesive sheet 114 is attached or an adhesive layer is formed on the upper surface of the support plate 110. The unit support leg 101 having such a structure is mounted at the time of construction by fitting the tip of a rotating tool such as a screwdriver into the groove 107 provided on the top end surface of the support bolt 104 and rotating the support bolt 104. Since the load from the floor panel is applied to the level adjusting nut 108 via the support plate 110 and its rotation is suppressed, the level adjusting nut 108 moves up and down and is supported by the support plate 110. The floor level of the panel can be adjusted.

An example of construction in the case of constructing a double floor using the unit support legs 101 assembled as described above is, for example, as shown in FIG. 11, first, a predetermined height of a room wall or partition 121 is set. An extra joist (or joist unit) 122 is provided along the side of which a side of the floor panel 123 is supported. The other edge of the floor panel 123 which does not contact the joist is connected to the foundation floor (concrete slab) 12 at a predetermined pitch.
The unit is mounted on the unit supporting leg 101 disposed on the top of the unit 0 in a state of being held in a cantilever manner. The unit support leg 101 and the floor panel 123 are attached by the support plate 110 of the unit support leg 101.
Through the double-sided adhesive sheet 114 or the like stuck on the upper surface,
When the floor panel is laid, the floor panel 123 is attached to the double-sided adhesive sheet 11.
It is crimped to 4 and temporarily fixed. The insertion hole 111 of the support plate 110 of the unit support leg 101 is exposed from the edge of the floor panel 123, and the support bolt 104 is turned by a driver or the like through the insertion hole 111, and the floor panel 123
(Or the upper surface of the support plate 110) is adjusted.

Similarly, adjacent floor panels are also mounted on the already installed unit support legs 101 with a predetermined gap for level adjustment of the floor panel 123, and other unit support legs 101 are similarly arranged and attached. Such work is repeated for each floor panel, the floor panel is constructed in a predetermined area, the floor level is adjusted, and then the floor panel 123 is nailed to the support plate 110 of the unit support leg 101 to form the floor panel 123 as a unit. The level adjusting nut 10 is fixed to the support leg 101 and the adhesive is injected from the adhesive reservoir 113.
8 and the support bolt 104 are bonded and fixed. Then, if necessary, the waste plywood 12 is placed on the floor panel 123.
After laying 4, or sticking a relatively rigid adhesive tape so as to cover the gap between adjacent floor panels,
A floor finishing material (not shown) such as a CF sheet, a carpet, a tatami mat, or a wooden floor material is laid and the work is completed.

[0007]

In the case of the conventional unit supporting leg 101 as described above, since the supporting bolt 104 is integrally molded from the solid material together with the lower flange portion 105, the productivity is poor and This is a major factor in cost increase. In terms of cost, when the floor height is low, that is, when the length of the support bolt 104 is short, there is no great influence, but when the double floor having a high floor height is constructed, the length of the support bolt 104 is small. The longer the length, the greater the cost increase, and the countermeasures against it are urgently required. Also, the unit support leg 1 assembled as described above
Since 01 is fixed to the base floor 120, conventionally, a method of applying an adhesive one by one to the lower surface of the floor contact base 102 of the unit support leg 101 and fixing it to a predetermined position of the base floor 120 is adopted. There was a problem that the construction workability of the double floor was poor, the construction time increased and the construction cost increased. Furthermore, when a solid support bolt is used, a rubber shock absorbing base intervenes, but floor impact noise and vibrations on the upper floors are easily transmitted to the lower floors. Further improvement is required.

Therefore, an object of the present invention is that it can be manufactured with high productivity and at low cost, and has sufficient strength despite its long length, and is particularly suitable for construction of a double floor with a high floor height. It is to provide a supporting bolt that can be used and a unit supporting leg using the supporting bolt. Further objects of the present invention are:
We provide an inexpensive unit support leg that can build a double floor with excellent sound insulation and vibration control with good workability and workability, and support bolts used for it, thus reducing the construction cost of a double floor with a particularly high floor, construction period The goal is to shorten the

[0009]

In order to achieve the above object, according to the present invention, a floor contact base, a support bolt rotatably erected on the base, and an upper portion of the support bolt. In a unit support leg consisting of a support plate mounted so that its height can be freely adjusted via a level adjusting nut screwed to, the support bolt has a collar portion laterally expanded at its lower portion, A unit support leg is characterized by comprising a hollow body having a central through hole, in which a screw portion is formed on the outer peripheral surface above the flange portion and a rotary tool engaging portion is formed at the top end portion. Provided. Further, according to the present invention, a flange portion which is laterally expanded is formed in the lower portion, a screw portion is formed on the outer peripheral surface above the flange portion, and an engaging portion for a rotary tool is formed at the top end portion. A support bolt for a unit support leg is provided, which comprises a hollow body having a central through hole.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The unit support leg according to the present invention is
As the support bolt, a hollow body (hollow pipe) is used, in which a collar portion is formed by buckling at a lower portion and a screw portion is formed on an outer peripheral surface above the collar portion. Therefore, the production thereof is easy, and the supporting bolt having a long length can be produced at a low cost, and can be suitably used especially for construction of a double floor having a high floor height. By the way, in order to increase the length of the support bolt, it is conceivable to cut a conventional support bolt at an intermediate portion and connect a hollow pipe between them. However, when joining the upper and lower halves of the support bolt to both ends of the hollow pipe, from the viewpoint of joint strength, female threads are cut on the inner circumference of both ends of the hollow pipe, and once screwed, caulking, welding, etc. However, in this method, the productivity of the support bolt is reduced, and stress concentration occurs at the joint between the hollow pipe and the bolt portion, which may cause breakage at this portion. On the other hand, in the case of the support bolt of the present invention, when a hollow pipe is made as an integral body using a material, such a problem does not occur, and sufficiently high strength can be maintained even if the length is long. In addition, the cost for maintaining the predetermined strength to withstand the floor load of the double floor is lower than that of the conventional solid support bolt.

In a preferred embodiment, the floor contact base is
A vertical through hole into which the lower portion of the support bolt is inserted is formed, and a groove extending from the through hole to the outer surface is formed on the lower surface thereof. In the case of a unit support leg having such a floor contact base, when the adhesive is injected from the adhesive reservoir formed above the level adjusting nut, the adhesive flows between the level adjusting nut and the support bolt. In addition to adhering and fixing between them, it also flows down through the central through hole of the support bolt to reach the lower surface of the floor-contacting base and penetrates into the groove formed on the lower surface of the floor-contacting base. The floor base and the base floor are also bonded and fixed together. Therefore, it is possible to simultaneously perform the adhesion / fixing between the level adjusting nut and the support bolt and the adhesion / fixing between the floor-contacting base and the foundation floor by a single injection of the adhesive. The workability of injection is greatly improved. Further, since the through hole of the floor-contacting base and the groove formed on the lower surface thereof serve as an air cushion, the impact applied to the floor is mitigated, and the sound insulation and vibration damping effect is excellent. Furthermore, the hollow support bolt according to the present invention is superior to the conventional solid support bolt in the effect of preventing the floor impact sound from propagating.

Further, the support bolt once installed is disengaged from the through hole of the floor contact base, or after the double floor is constructed, the support bolt is disengaged from the through hole of the floor contact base due to vertical vibration during an earthquake. In order to prevent the risk of the floor collapsing, it is preferable that the lower end portion of the support bolt is provided with engagement means for retaining. Although any means can be adopted as the engagement means for preventing the slip-out, for example, a through-hole of the floor-contacting base is extended from the upper side to the lower side to form a small-diameter portion having an inner diameter substantially equal to the outer diameter of the support bolt. Make a through hole consisting of a large diameter part with an inner diameter larger than the small diameter part, and expand the lower end of the support bolt so that the expansion part is located near the small diameter part of the large diameter part of the base, or drop out. An E-ring for stopping can be attached. As another aspect, a flange is formed at the lower end of the support bolt, and a recess for receiving the flange is formed in the floor base.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the embodiments shown in the accompanying drawings. 1 and 2
FIG. 3 shows an assembled state of a floor-contact base and a support bolt of an embodiment of the unit support leg of the present invention. The level adjusting nut screwed onto the upper portion of the support bolt and the supporting plate on which the level adjusting nut is mounted can be any of the conventionally used unit supporting legs. Are not shown and described.

In FIGS. 1 and 2, reference numeral 1 is a floor contact base, and 10 is a support bolt that is rotatably erected on the base. The floor-contacting base 1 is made of a relatively hard elastic material such as rubber or synthetic resin, and is adapted to just fit to the foundation floor surface of a concrete slab and to perform a vibration-proof function. And the support bolt 1
A vertical through hole 2 for inserting the lower base end portion 13 of 0 is formed. The through hole 2 is composed of a small diameter portion 3 having an inner diameter substantially equal to the outer diameter of the support bolt and a large diameter portion 4 having an inner diameter larger than the small diameter portion 3 from the upper side to the lower side, and a step portion is formed in the through hole 2. It is configured to be. Further, on the lower surface of the floor-contacting base 1, a plurality of (4 in the illustrated example) grooves 5 extending from the through-hole 2 to the outer surface are radially (cross-shaped) formed.

On the other hand, the support bolt 10 has a central through hole 15
A ring-shaped collar portion 1 which is made of a hollow pipe having
1 is formed by buckling and is configured so that the load receiving surface for the floor-contacting base 1 is large, a screw portion 12 is formed above the collar portion 11, and the top end portion of the support bolt 10 is further formed. An engaging portion (hexagonal head) 14 for fitting the tip of a rotating tool (hexagonal wrench) is formed. Then, the base end portion 13 of the support bolt 10 is fitted into the through hole 2 of the floor-contacting base 1 via the washer 20 and the lower end of the base end portion 13 is expanded, so that the support bolt 10 has the collar portion 11. It is in a state of being rotatably erected on the floor-contacting base 1 as a support portion, and the lower end of the expanded base end portion 13 is located between the small diameter portion 3 and the large diameter portion 4 of the through hole 2 of the base 1. Since it is hooked on the stepped portion, the support bolt 10 is prevented from coming off from the floor-contacting base 1.

FIGS. 3 and 4 show an assembled state of the floor contact base and the support bolt of another embodiment of the unit support leg of the present invention. The unit support leg shown in FIGS. 3 and 4 has a small diameter portion 3a having an inner diameter substantially equal to the outer diameter of the support bolt and the small diameter portion 3a in the through hole 2a of the floor contact base 1a from the upper side to the lower side.
A large-diameter portion 4a having a larger inner diameter is formed, and a plurality (four in the illustrated example) of grooves 5a extending from the through hole 2a to the outer surface are radially formed on the lower surface of the floor-contacting base 1a. It is the same as the above-mentioned embodiment in that it is formed into a shape. On the other hand, the support bolt 10a is the same as that of the above-mentioned embodiment in that the annular flange portion 11a protruding laterally is formed on the outer peripheral surface at a position spaced apart from the lower end by a predetermined distance, but the top end portion thereof is the same. A groove 14a is formed as an engaging portion into which the tip of the driver is fitted, and a ring-shaped groove 16 for fitting an E-ring is formed at the tip of the base end 13a, which is different from the above-described embodiment. In the case of this embodiment, the base end portion 13a of the support bolt 10a is connected to the floor contact base 1a.
After being inserted into the through hole 2a, the E-ring 21 is fitted into the ring-shaped groove 16 to prevent the support bolt 10a from coming out of the floor-contact base 1a. The means for preventing the support bolts from coming off is not limited to the means described in the above embodiment, and various means can be adopted.

FIG. 5 and FIG. 6 show another embodiment of the mounting mode of the support bolts of the unit support legs and the floor contact base of the present invention. In the case of this embodiment, four grooves 5b extending from the through hole 2b to the outer surface are radially (cross-shaped) formed on the lower surface of the floor-contact base 1b, as in the above-described embodiments. However, a plurality of (in the illustrated example, four) pressing portions 6 that are bent inward are projected on the upper part thereof, and a concave portion 7 that receives the flange portion 11b of the support bolt 10b is formed inside the pressing portion 6. It is different from each of the above-mentioned embodiments in that. In the case of this embodiment, the lower end portion of the support bolt 10b is buckled to form the collar portion 11b at the tip.
The support bolt 10b is rotatably erected on the floor-contacting base 1b by inserting and locating 1b into the recess 7 of the floor-contacting base 1b.
It is possible to prevent 0b from coming off from the floor contact base 1b.

In any of the above-mentioned embodiments, the central through holes 15, 15a, 1 of the support bolts 10, 10a, 10b.
5b and through-holes 2, 2a, 2b of the floor contact bases 1, 1a, 1b
Are in communication with each other, and the through holes 2, 2a, 2b of the floor contact bases 1, 1a, 1b are also in communication with the grooves 5, 5a, 5b formed on the lower surface. After laying the floor panel and adjusting the floor level as described in the prior art using the above, when the adhesive is injected from the adhesive reservoir formed on the level adjustment nut, the adhesive is used for level adjustment. Not only does it flow into the space between the nut and the support bolt to bond and fix the space therebetween, but the support bolt 10,
10a, 10b flow through the central through holes 15, 15a, 15b to reach the lower surface of the floor-contacting base, and the floor-contacting bases 1, 1
It also penetrates into the grooves 5, 5a, 5b formed on the lower surface of a, 1b to bond and fix also between the floor-contact base and the foundation floor. Therefore, it is possible to simultaneously perform the adhesion / fixing between the level adjusting nut and the support bolt and the adhesion / fixing between the floor-contacting base and the foundation floor by a single injection of the adhesive. The workability of injection is greatly improved. In addition, the flooring base 1,
The through holes 2, 2a, 2b of 1a, 1b and the grooves 5, 5a, 5b formed on the lower surface thereof serve as an air cushion, so that the impact applied to the floor is mitigated and the sound insulation and vibration damping effect is excellent. ing.

Next, the support bolts 10 and 1 as described above.
The basic concept of buckling forming of the collar portions 11, 11a, 11b of 0a, 10b will be described with reference to FIGS. 7 to 9. In the molding device 30 shown in FIG. 7, reference numeral 31 is a base, 40 is a pipe gripping device, 50 is a pressing device, and 60 is a holding device. First, the outer circumference of the hollow pipe is threaded in a predetermined range, and a raw material 70 in which an engaging portion for a rotary tool is formed at one end thereof is used as an upper member 41 and a lower member 43 of the pipe gripping device 40.
Are arranged in the through holes formed by the respective groove portions 42 and 44. Protrusion-shaped stoppers 45 and 46 are provided in the vicinity of the molding side end portions of the groove portions 42 and 44 of the upper member 41 and the lower member 43, respectively.
The upper member 41 is pressed toward the lower member 43 by the spring 47, and is configured to firmly grip the pipe material 70 (see FIG. 8).
Next, the pressing member 61 of the pressing device 60 is attached to the guide rail 6
2 is moved, placed on one end of the gripping device 40, and fixed. After that, the hydraulic cylinder 51 of the pressing device 50 is operated, one end of the pipe material 70 is buckled and formed by the punch 52 attached to the tip thereof, and the support having the flange portion as shown in FIG. 2 and FIG. Mold the bolt.
At this time, the pipe material 70 does not buckle inward, but the pin 53 inserted into the pipe material 70 at the tip of the punch 52 is in view of the directionality of the press and the shape of the flange.
Is preferably provided.

FIG. 9 shows the construction in the case where the collar portion is buckled and formed at the tip of the pipe material as shown in FIG. 5, and the basic construction of the forming apparatus is the same as that in the case described above. Is omitted. A commercially available product can be used as such a pipe terminal molding apparatus, and examples thereof include Type HDB and HTB manufactured by Matsumura Machinery Co., Ltd., and DPM series manufactured by DIP. As for the forming order, the collar may be formed after the thread cutting, the forming of the rotary tool engaging portion, or the reverse order.

[0021]

As described above, the unit support leg according to the present invention is made of a hollow pipe, and is formed by buckling the collar portion on the lower portion and forming the screw portion on the outer peripheral surface above the collar portion. Since bolts are used, it is easy to make them, and long length support bolts can be manufactured at low cost.
Particularly, it can be suitably used for construction of a double floor with a high floor height. In addition, since the support bolt of the present invention is made of a hollow pipe as an integral body, it can maintain a sufficiently high strength even if the length is long, and retains a predetermined strength to withstand the floor load of a double floor. The cost for doing so is lower than that of conventional solid support bolts.

A unit support having a flooring base having a vertical through hole into which the lower portion of the support bolt is inserted, and a groove extending from the through hole to the outer surface is formed on the lower surface thereof. In the case of legs, the adhesive is injected from the adhesive reservoir formed on the upper part of the level adjusting nut. Adhesion between the base and the base floor
The fixing can be performed at the same time, and the workability of the adhesive injection is remarkably improved. Further, since the through hole of the floor-contacting base and the groove formed on the lower surface thereof serve as an air cushion, the impact applied to the floor is mitigated, and the sound insulation and vibration damping effect is excellent. Furthermore, the unit support leg using the hollow support bolt as in the present invention is superior to the unit support leg using the conventional solid support bolt in the effect of preventing the propagation of the floor impact sound. . Furthermore, by providing engagement means for preventing slippage at the lower end of the support bolt,
It is possible to build a double floor structure with excellent earthquake resistance.

[Brief description of drawings]

FIG. 1 is a plan view showing an assembled state of a floor contact base and a support bolt of an embodiment of a unit support leg according to the present invention.

FIG. 2 is a partially cutaway side view showing an assembled state of a floor contact base and a support bolt of an embodiment of a unit support leg according to the present invention.

FIG. 3 is a plan view showing an assembled state of a floor contact base and a support bolt of another embodiment of the unit support leg according to the present invention.

FIG. 4 is a partially cutaway side view showing an assembled state of a floor contact base and a support bolt of another embodiment of the unit support leg according to the present invention.

FIG. 5 is a partially cutaway side view showing a state of a floor base and an attachment portion of a support bolt of still another embodiment of the unit support leg according to the present invention.

6 is a perspective view of the floor contact base shown in FIG. 5. FIG.

FIG. 7 is a schematic side view showing an example of a forming apparatus for buckling forming of a collar portion of a support bolt according to the present invention.

8 is a schematic explanatory view of an example of buckling forming of a hollow pipe by the forming apparatus shown in FIG.

9 is a schematic explanatory view of another example of buckling forming of a hollow pipe by the forming apparatus shown in FIG.

FIG. 10 is a partial cross-sectional side view of an example of a conventional unit support leg.

FIG. 11 is a cutaway perspective view showing a state where a floor panel of a double floor is constructed using conventional unit support legs.

[Explanation of symbols]

 1, 1a, 1b Floor base 2, 2a, 2b Through hole 3, 3a Small diameter part 4, 4a Large diameter part 5, 5a, 5b Groove 10, 10a, 10b Support bolt 11, 11a, 11b Collar part 12, 12a Screw part 14, 14a Engagement part for rotary tool 15, 15a, 15b Central through hole 101 Unit support leg 102 Grounding base 108 Level adjusting nut 110 Support plate 113 Adhesive reservoir 120 Base floor (concrete slab) 123 Floor panel

Claims (5)

[Claims] 1. A height-adjustable mount via a floor-mounting base, a support bolt rotatably erected on the base, and a level adjusting nut screwed onto the upper part of the support bolt. In the unit support leg composed of a support plate formed with the support plate, the support bolt has a flange portion that is laterally expanded at a lower portion of the support bolt, and a screw portion is formed on an outer peripheral surface above the flange portion. A unit support leg comprising a hollow body having a central through hole, in which a rotary tool engagement portion is formed at a top end portion. 2. The floor contact base has a vertical through hole into which the lower portion of the support bolt is inserted, and a groove extending from the through hole to the outer surface is formed on the lower surface thereof. The unit support leg according to claim 1, wherein: 3. The unit support leg according to claim 1, wherein engagement means for retaining is provided at a lower end portion of the support bolt. 4. The unit according to claim 1, wherein a collar portion is formed at a lower end portion of the support bolt, and a concave portion for receiving the collar portion is formed in the floor-contacting base. Support legs. 5. A flange portion which is laterally expanded is formed in a lower portion, a screw portion is formed on an outer peripheral surface above the flange portion, and an engaging portion for a rotary tool is formed at a top end portion. A support bolt for a unit support leg, which is a hollow body having a central through hole.