JPH06299679A - Height adjustment of support leg for double floor - Google Patents

Abstract

PURPOSE:To stably hold a position of a support leg height of which is adjusted by using a jig by applying a specified pressure sensitive adhesive with proper adhesive strength and viscosity on a screwing part of a screw. CONSTITUTION:Support bolts 2 forming male screws are respectively erectly provided on four corners of a base 1, and on each of the support bolts 2, a panel support body 3 formed to vertically pass through a female screw screwed with this male screw is arranged. On such a male screw part of the support bolt 2 and a female screw part of the panel support body 3, a mono-liquid type solvent type acrylic pressure sensitive adhesive consisting of a acrylic ester/vinyl acetate copolymerized substance and adhesive strength against a stainless plate of which is 1000-4000gr/25mm is applied. Thereafter, after removing a panel presser bolt 9 by way of arranging a support leg at a specified position, height of the panel support body 3 is previously and roughly adjusted. Thereafter, into a panel guide part insertion hole of a panel 10 for double flooring, a panel guide part 5 is inserted and fit. Thereafter, a screwdriver is fit in a screwdriver fitting groove 6 of the panel support body 3, a height is adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a double-floor panel used for maintaining a work environment by accommodating various wiring cords under the floor in a room handling OA equipment such as a computer room and an office. The present invention relates to a method for adjusting the height of the support legs for double floors for carrying out.

[0002]

2. Description of the Related Art Conventionally used double-floor support legs include four double-floor panels (hereinafter,
(Sometimes referred to as "floor panel"), one support leg with a pedestal is installed at the junction, and each floor panel is placed on a pedestal plate, or as shown in FIG. Four pillar type projecting four pillar bolts on one board, screwing a panel support to each pillar bolt, and fitting this panel support into a through hole drilled in the floor panel to fix it. The ones are known and used according to their respective purposes.

In the pedestal type support leg shown in FIG. 5, a column nut 21 is provided at the center of the substrate 1, and a pedestal bolt 22 is screwed into the column nut 21. A disc-shaped pedestal plate 23 having four guides 24 is disposed on the upper end portion of the pedestal bolt 22, and the pedestal bolt 22 and the pedestal plate 23 form a panel support. Also, the pedestal bolt 22
A hexagonal nut 25 for fixing is screwed into the. The double floor panel (not shown) is guided by the guide 24 and placed four on the pedestal plate 23, then the panel pressing plate 26 is placed on the intersection of the four floor plates, and then the pressing plate is pressed. By tightening with the plate fixing bolts 27, the pedestal plate 23 and the panel pressing plate 26 are sandwiched and fixed.

The height of the panel support is adjusted by turning the pedestal bolt 22, and the pedestal bolt 22 is fixed by crimping the fixing hexagon nut 25 to the support nut 21. Therefore, with this type of support leg, it is impossible to adjust the height with the floor panel placed, and it is necessary to adjust the height in advance before the floor panel is placed. For readjustment or fine adjustment of the height after laying the floor panel, first remove the floor panel, then loosen the fixing hexagon nut 25 arranged under the pedestal plate, and then pedestal bolt. 22 must be rotated. Therefore, the height adjusting method that has been conventionally performed in the above-described pedestal type supporting legs is an extremely complicated and time-consuming operation, and has many problems. In addition, since the screw for screwing the support nut and the panel support has some play, it is inevitable that the screwed portion has some rattling.

On the other hand, in the four-pillar support leg shown in FIG. 6, pillar bolts 31 are provided at four corners of the substrate 1 so as to project from each pillar bolt 31.
A panel support 30 is screwed onto the. (In the figure,
The state where one panel support is removed is shown. ) The panel support 30 is provided with a cylindrical cap 32 on the upper part, a pedestal plate 34 having an annular shape in the middle, and a hexagonal nut part 35 on the lower part, and is screwed onto the top of the cylindrical cap 32. A fitting hole 33 is formed so as to penetrate the top. This four-pillar support leg is installed at one of the joints of four floor panels, and each floor panel has a cylindrical cap 32 fitted in through holes formed at predetermined positions on the four corners of the back surface thereof. It is fixed after adjusting the height.

The height adjustment of the panel support 30 is performed by inserting and fitting a jig such as a screwdriver into the screwdriver fitting hole 33 and turning the jig. Then, in order to fix the panel support 30 after adjusting the height thereof, generally, a method of injecting an adhesive through a screwdriver fitting hole 33 and leaving it for a predetermined time to cure the adhesive is used. Is going.
The adhesive used for this usually takes about 1 hour to cure, and the next step is to wait for the adhesive to cure before the next operation. Therefore, the height adjustment work is extremely inefficient.

In order to readjust the floor height after fixing once, the adhesive must be dissolved with a dissolving agent, etc.
For example, when it is very difficult to dissolve, for example, it takes a long time for the dissolving agent to penetrate, by peeling at least one of the adjacent floor panels, insert a spanner or the like from this portion and turn the hexagon nut portion 35. I was going. Therefore, the readjustment of the height is an extremely complicated and time-consuming operation. In addition, since the screw for screwing the support bolt and the panel support has some play, some rattling of the screwed portion is unavoidable.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to install a double-floor panel without causing rattling of a support leg and a floor. It is an object of the present invention to provide a method for adjusting the height of a support leg for a double floor, in which the height can be adjusted easily and efficiently, and maintenance management such as fine adjustment of the floor height after construction is easy.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a double-floor support leg comprising a substrate, a supporting member protruding from the substrate, and a panel support body screwed to the supporting member. When adjusting the height of the panel support, a one-component solvent-type acrylic pressure-sensitive adhesive having an adhesive force of 1000 to 4000 g / 25 mm to a stainless steel plate in a threaded portion between the support member and the panel support. This is achieved by a method for adjusting the height of a support leg for double floors, which is characterized in that an agent is applied.

The double-floor support leg (hereinafter sometimes simply referred to as "support leg") to which the method of the present invention is applied has a structure in which a threaded screw provided on a support member and a panel support is turned. Therefore, the height of the floor is adjusted, and the shape thereof is not particularly limited. As such a supporting leg, for example, a supporting leg having a shape as shown in FIGS. 5 and 6 described above and a supporting leg as shown in FIG. 1 used in Example 1 described later can be cited. The strut member in the present invention means the above-mentioned strut nut, strut bolt, or the like, but includes those having the same function as those.

The pressure sensitive adhesive (adhesive) used in the present invention is
It has a proper adhesive force, viscosity and cohesive force. As the pressure sensitive adhesive, solvent type, emulsion type,
There are hot-melt type and the like, but solvent type is used in the method of the present invention. The emulsion type is one in which polymer particles are dispersed in water and is not preferable because it may corrode the metal of the screw. Further, the hot-melt type needs to be melted by heating, is not easy to handle on site, and is not practical.

The solvent-based pressure-sensitive adhesive used in the present invention is made of an acrylic polymer. Other solvent-based pressure-sensitive adhesives include rubber-based and silicone-based pressure-sensitive adhesives, but it is difficult to obtain those having suitable physical properties for attaining the object of the present invention, which are not practical.

The pressure-sensitive adhesive used in the present invention is a one-component type. In the case of the two-pack type, a work process such as mixing a predetermined amount of a cross-linking agent and curing for a predetermined time is required at the construction site, and the construction efficiency is poor and not suitable for the purpose of the present invention.

The solvent-type acrylic pressure-sensitive adhesive used in the present invention is mainly composed of a monomer such as butyl acrylate or 2-ethylhexyl acrylate that forms a polymer having a second-order transition point of -40 ° C or lower. Short-chain alkyl acrylates and methacrylates such as methyl acrylate, methyl methacrylate, vinyl acetate, etc. as a component that gives cohesive force to acrylic acid, and acrylic acid as a functional monomer that becomes a crosslinking point,
It is a polymer in which 2-hydroxyethyl methacrylate or the like is copolymerized.

The solvent-type acrylic pressure-sensitive adhesive used in the present invention has an adhesive force of 1000 to 4000 g / 25 mm. If the adhesive strength is less than 1000g / 25mm,
It is not possible to fix the screwed part of the support leg sufficiently, while
If the adhesive strength is greater than 4000 g / 25 mm, the height of the supporting leg cannot be easily adjusted because a very large force is required to move the screwed portion.

The pressure-sensitive adhesive strength of the pressure-sensitive adhesive in the present invention is a value determined by a 180 ° peeling method in accordance with JIS Z0237. The measurement is performed under the environmental conditions of a temperature of 20 ° C. and a relative humidity of 65%, and a peeling speed is 30.
It is 0 mm / min.

The solvent-type acrylic pressure-sensitive adhesive used in the method of the present invention preferably has a second-order transition point (glass transition point) of -20 ° C or lower. Those having a high second-order transition point generally have a low adhesive force and lack elasticity, so that the height adjustment of the supporting legs cannot be performed smoothly.

The solvent-based acrylic pressure-sensitive adhesive used in the present invention preferably has a weight average molecular weight measured by GPC of 100,000 to 2,000,000, more preferably 200,000 to 10,000,000.
It's one hundred thousand. In the present invention, the pressure-sensitive adhesive having a small weight average molecular weight tends to have insufficient cohesive force, and when the cohesive force is small, the screwed portion is not sufficiently fixed and the height of the supporting leg is stably maintained. Will be difficult to do.

Solvent-type acrylic pressure-sensitive adhesives have a tackiness that is improved by increasing the degree of polymerization (molecular weight) of the acrylic polymer, but the viscosity of the solution also greatly increases. , It becomes difficult to coat the screw.
Therefore, the solvent-type acrylic pressure-sensitive adhesive used in the method of the present invention is preferably one which is appropriately crosslinked.

As a one-pack type cross-linking method for a solvent-type acrylic pressure-sensitive adhesive, for example, a polymer having a reactive hydroxyl group such as --COOH group or --OH group and a metal alkaloid or chelate capable of forming a chelate are used. The method of combining with a metal alkaloid is mentioned.

Here, the metal alkaloid is represented by the general formula R _n Me (OR ₁ ) _z . In the formula, Me is II of the periodic table,
A metal in group III, IV or V, R is an alkyl or aryl group, R ₁ is an aliphatic and substituted aliphatic residue, such as an alkyl or allyl group, n
Is an integer of zero or more, z is an integer of at least 2, and the sum of n + z is equal to the value of Me.

Examples of the chelating agent include octylene glycol, triethanolamine, 2,4 pentanedione lactic acid and the like. The chelating agent can be added directly to the acrylic solution, or can be added to the metal alkaloid and then to the solution.

Further, in order to stabilize the one-pack type solution, it is possible to add a chelating agent in excess or to add a lower alcohol such as ethanol, propanol, isopropanol or butanol to the solution. If necessary, various additives such as antioxidants and softeners may be added.

Specific examples of the metal alkaloid or chelated metal alkaloid having a chelate-forming ability as described above include tetra-n-butoxytitanium, tetra-isopropoxytitanium, aluminum acetylacetonate, and ethylacetoacetate aluminum diisopropylate. The rate etc. can be mentioned. The amount of these metal alkaloids used is preferably 0.1 to 0.5% by weight based on the solid content.

[0025]

The solvent-type acrylic pressure-sensitive adhesive interposed between the male screw and the female screw has appropriate adhesive force, viscosity and cohesive force, so that the screwed portion is appropriately fixed without rattling. Therefore, the screw does not easily rotate due to vibration or a small external force, but it can be relatively easily rotated by using a jig such as a driver. Therefore, the height of the support leg that has been adjusted can be stably maintained, and if fine adjustment or readjustment of the height is required, turn the screw with an appropriate jig such as a screwdriver. Therefore, the height can be easily adjusted.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Example 1 FIG. 1 is a longitudinal sectional view of an essential part showing an example of a support leg for a double floor to which the method of the present invention is applied, FIG. 2 is a plan view of the support leg of FIG. 1, and FIG. FIG. 4 and FIG. 4 are plan views of relevant parts for explaining a mode in which the panel pressing bolt is removed from the support leg of FIG. In this support leg, pillar bolts 2 (pillar members) formed with male threads are projected from four corners of the substrate 1, and each pillar bolt 2 is provided with a panel support body 3 formed with female threads to be screwed with the male threads. It is set up. The female screw is provided so as to vertically penetrate the panel support 3.
The panel support 3 has an annular pedestal plate 4 approximately at the center thereof.
A cushioning sheet 7 made of felt is attached on the base plate 4. In addition, a cylindrical panel guide portion 5 that fits into the through hole of the floor panel is formed on the panel support 3. Further, the upper end of the panel support 3 is provided with a screwdriver fitting groove 6 used for height adjustment.

A panel pressing bolt 9 which is screwed with the female screw is screwed to the upper end of the panel support 3. A screwdriver fitting hole 12 is formed on the top of the panel pressing bolt 9. The panel pressing bolt 9 is composed of a disk-shaped portion that presses the upper surface of the floor panel and a male screw portion that engages with the female screw of the panel support 3.

As the floor panel to which the above-mentioned double floor support leg is applied, for example, one in which panel guide portion insertion holes are formed at predetermined positions at four corners is used. Around the panel support insertion hole of the floor panel, a panel pressing bolt recess 11 having a shape slightly larger than the panel pressing bolt is formed.

A one-component solvent-based acrylic pressure-sensitive material composed of an acrylic ester / vinyl acetate copolymer is attached to the male screw portion of the pillar bolt 2 and the female screw portion of the panel support 3 of the support leg for double floor. The adhesive was applied. This pressure-sensitive adhesive has an adhesive force of 1500 g / 25 mm and a second-order transition point of -44.
It had a weight average molecular weight of about 250,000 at ℃.

Next, the foundation floor surface is accurately dimensioned,
The support legs were placed in place. After removing the panel pressing bolt 9 of the support leg, the height of the panel support 3 was adjusted in advance. Then, the panel guide portion 5 was inserted into and fitted into the panel guide portion insertion hole of the floor panel. By repeating this operation, the floor panel was placed at a predetermined position.

Next, a slightly larger screwdriver was screwed into the fitting groove 6 of the panel support 3 and was rotated to adjust the height. A solvent-type acrylic pressure-sensitive adhesive is interposed in the screwed portion 8 between the male screw of the pillar bolt 2 and the female screw of the panel support 3, and the screwed portion does not rattle during adjustment, and after adjustment, It was firmly fixed.

Subsequently, the panel pressing bolt 9 was screwed to the upper end of the panel support 3, and the floor panel was clamped by the panel pressing bolt 9 and the pedestal plate 4. This securely fixed the floor panel to the panel support.

On the other hand, when the height of the floor panel is readjusted, the panel holding bolt 9 is removed, and then a driver or a predetermined rotating jig is fitted from the upper end of the panel support 3 to the panel. The support 3 may be rotated. The pressure-sensitive adhesive on the support bolt 2 and the threaded portion 8 of the panel support 3 adheres and resists rotation, but it does not impede smooth rotation of the panel support, and allows for delicate height adjustment. I was able to do it efficiently. Further, in this embodiment, since the height of the floor can be adjusted with the floor panel placed,
I was able to make extremely precise adjustments.

Examples 2 and 3 In place of the solvent-based pressure-sensitive adhesive used in Example 1, the composition and average molecular weight of the acrylic ester / vinyl acetate copolymer as the main component were changed to give Table 1 A solvent-type pressure-sensitive adhesive having the properties as shown in (1) was prepared, and the height of the support legs for double floors was adjusted in the same manner as in Example 1 except that this was used. The results are as shown in Table 1, and in all cases, the height of the floor surface could be adjusted accurately and efficiently without rattling of the screwed portion.

Example 4 As a solvent type pressure-sensitive adhesive, the main component used in Example 1 was replaced by the acrylic ester / vinyl acetate copolymer, and the acrylic ester copolymer was used. 1
Was prepared, and the height of the support leg for double floor was adjusted in the same manner as in Example 1 except that this solvent-based pressure-sensitive adhesive was used. The results are as shown in Table 1.

[0037]

[Table 1]

Comparative Examples 1 to 4 Instead of the solvent-based pressure-sensitive adhesive used in Example 1, the composition and the average molecular weight of the acrylic ester / vinyl acetate copolymer as the main component were changed to give Table 2 A solvent-type pressure-sensitive adhesive having the properties as shown in (1) was prepared, and the height of the support legs for double floors was adjusted in the same manner as in Example 1 except that this was used. The results are as shown in Table 2.

[0039]

[Table 2]

[0040]

According to the method of the present invention, a solvent-type acrylic pressure-sensitive adhesive having an appropriate adhesive force and viscosity is applied to a threaded portion of a screw, so that the threaded portion rattles during and after adjustment. In addition, the screwed portion is firmly fixed, and it can be easily rotated by an appropriate jig such as a driver. Therefore, the height of the support leg for double floor is
It can be stably held and, if necessary, readjustment or fine adjustment of the floor height can be easily and efficiently performed by an appropriate jig. Further, according to the method of the present invention,
No need for fixing nuts or screws.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of double-floor support legs to which the method of the present invention is applied.

FIG. 2 is a plan view showing a form in which a panel pressing plate and a pressing plate fixing bolt are removed from the support leg of FIG.

FIG. 3 is a side view showing an example of a usage state of the support leg of FIG.

4 is a plan view of relevant parts showing a state where a panel pressing plate of the support leg of FIG. 1 is removed.

FIG. 5 is a perspective view showing an example of a pedestal type support leg which has been conventionally used.

FIG. 6 is a perspective view showing an example of a conventionally used four-pillar support leg.

[Explanation of symbols] 1 substrate 2 support bolts (support members) 3 panel support 4 pedestal plate 5 panel guide section 6 screwdriver fitting groove 7 buffer sheet 8 screwing section 9 panel holding bolt 10 double floor panel 11 panel Recess for presser bolt 12 Screwdriver fitting hole 13 Floor engaging hole

Claims (1)

[Claims] 1. A substrate, and a pillar member protruding from the substrate,
In a double-floor support leg including a panel support screwed to the support member, a stainless steel plate is provided at a threaded portion between the support member and the panel support when adjusting the height of the panel support. Adhesion to 1000-4000
A height adjusting method for supporting legs for a double floor, characterized by applying a one-component solvent-type acrylic pressure-sensitive adhesive having a g / 25 mm.