JPH0941634A - Fixing construction of free access floor panel supporting bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify adjustment of height of a supporting bolt, and facilitate sure fixing of the supporting bolt and height adjustment after fixing, in a free access floor panel of which the height can be adjusted by the depth of threaded engagement of the supporting bolt. SOLUTION: In a free access floor panel 1 in which through holes 1a are provided on the four corners, a pedestal 1b with internal thread is fitted to the through hole 1a, further, a supporting bolt 2 is threadedly inserted into the pedestal 1b, and the height is adjusted by the thrededly engaged depth, adhesive agent 4 is let adhere to a cylindrical body 3 of which the inner diameter is larger than the outer diameter of the thread part of the supporting bolt 2, and the outer diameter is smaller than the inner diameter of the through hole 1a. It is inserted along the outer circumference of the supporting bolt 2, and the adhesive agent 4 flowing down from the cylindrical body 3 is permeated the clearance between the internal thread 1c and the supporting bolt 2 and hardened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a free access floor panel whose height can be adjusted by the screwing depth of the support bolts. The height of the support bolts can be easily adjusted and the support bolts can be securely fixed. In addition, when it becomes necessary to readjust the height of the free access floor panel,
The present invention relates to a fixing structure for a free access floor panel support bolt, by which a female screw and a support bolt can be easily loosened.

[0002]

2. Description of the Related Art In recent years, various free access floor panels have been used to lay wiring and the like for office automation equipment under the floor. Of these free access floor panels, through holes are provided at the four corners of the free access floor panel, and a pedestal with a female screw is attached to the through holes, and a support bolt is screwed into the pedestal, depending on the screw depth of the support bolt. There is a type that adjusts the height, that is, a so-called support leg integrated type. This type has an advantage that it is easy to perform this work one by one from the upper surface of the free access panel when leveling after laying the free access floor panel on the entire surface. However, there is a backlash between the female screw and the male screw of the support bolt, and there is a drawback that the support bolt rotates during use and the level is changed. As a measure against this,
Inject and fix the adhesive in the gap between the support bolt and the female screw (Actual No. 3-66344) Form the coating film on the support bolt or the female screw (Actual No. 3-54447)
Insert the male screw for preventing loosening from the top (actual opening flat 2-27
No. 446) Screw in the lock nut from above.
And so on.

[0003]

In the method of fixing with an adhesive among the above-mentioned measures, since the bonding place is at the bottom of the through hole, it is difficult to visually confirm the bonding and fixing after the work. If a large amount of the adhesive is used to the extent that it can be visually confirmed, the head portion of the support bolt is filled with the adhesive, which makes it impossible to readjust the level. Further, the method of forming a coating film on the screw is costly and a burden is imposed on the operator because the load is large when the support bolt is screwed or the bolt is rotated when adjusting the level. There was a drawback. In addition, the method of inserting the male screw and nut for preventing loosening may cause a load during screwing in due to poor screw accuracy or eccentricity between the center line of the through hole and the center line of the female screw. There is a problem in that the operator may misjudge the judgment, the support bolt itself may rotate together, and it is necessary to redo the level adjustment from the beginning. In view of such a situation, an object of the present invention is to provide a fixing structure for a free access floor panel support bolt, which is simpler, more reliable, less expensive, and less burdensome for an operator.

[0004]

Means for Solving the Problems The present inventors have conducted intensive research. As a result, if a tubular body with an adhesive is inserted along the outer periphery of the support bolt, the adhesive will flow down from the tubular body and efficiently penetrate into the gap between the female screw and the support bolt to cure. That is what led to the present invention. That is,
According to the present invention, the four holes have through holes (1a), the pedestal (1b) with a female screw is attached to the through holes, and further, the support bolt (2) is screwed into the pedestal, In a free access floor panel (1) whose height is adjusted according to the joint depth, it is bonded to a tubular body (3) whose inner diameter is larger than the outer diameter of the screw part of the support bolt and whose outer diameter is smaller than the inner diameter of the through hole. A free access floor panel support bolt, characterized in that the agent (4) is adhered and inserted along the outer periphery of the support bolt so that the adhesive flowing down from the tubular body is permeated and hardened in the gap between the female screw and the support bolt. A free access floor panel, characterized in that it has an adhesive reservoir (3a) consisting of holes, depressions, grooves, etc. at least near the lower end of the tubular body (3). Support bolt fixing Structure, and more preferably, the tubular body (3) has a different color tone than the free access floor panel (1) and the support bolt (2). A bolt fixing structure is provided, and the return torque strength between the female screw and the support bolt after the adhesive is hardened is 5 to 40 kg.
A free access floor panel support bolt fixing structure characterized by being cm, and more preferably a free access characterized in that the adhesive is a one-part moisture-curable urethane adhesive A fixing structure of a floor panel support bolt is provided, and a groove (2b) for inserting a tool for rotating the support bolt into the support bolt head is cut up to the outer periphery of the bolt, and the adhesion adhered to the head. There is provided a fixing structure for a free access floor panel support bolt, which is characterized in that the agent flows down through the groove, and more preferably, the groove (2b) cut to the outer periphery of the bolt is inclined. A free access floor panel support bolt fixing structure is provided, and the support bolt head has a pyramid or A structure for fixing free access floor panel support bolts is provided, which has a shape in which a tip of a cone is cut to facilitate insertion of a cylindrical body with an adhesive, and Provided is a fixing structure for a free access floor panel support bolt, characterized in that a rubber cap (2a) is attached to a lower end of the support bolt (2).

Hereinafter, the present invention will be described in detail. The fixing structure of the free access floor panel support bolt of the present invention,
Used for fixing support bolts used as support legs for free access floor panels with integrated support legs.
The first feature of the present invention is a cylinder whose inner diameter is larger than the outer diameter of the screw portion of the support bolt (2) constituting the free access floor panel (1), and further smaller than the inner diameter of the through hole (1a). The adhesive (4) is attached to the cylindrical body (3), inserted along the outer circumference of the support bolt (2), and the adhesive (4) flowing down from the cylindrical body (3) is supported by the female screw (1c). This is to permeate and harden the gap between the bolts (2). By doing so, the female screw (1
c) and a proper amount of adhesive can be concentratedly supplied to the portion where the male screw provided on the support bolt (2) is screwed,
The following merits occur. Adhesive is less likely to adhere to the tool receiving part provided on the head of the support bolt, and when the height of the free access floor panel needs to be readjusted, it does not hinder the use of the tool. . Since the female screw and the support bolt will not be bonded with more adhesive strength than necessary, when the height of the free access floor panel needs to be readjusted, the female screw and the support bolt can be easily used by using a tool. Can be loosened. During construction, the tubular body can be easily seen from the top, so it is easy to distinguish where the support bolts are fixed and where they have not been fixed. You can prevent going. There is no possibility that the support bolt will rotate together with the support bolt, as seen when the male screw for locking and the nut for locking are screwed into the support bolt from above. By inserting a cylinder into the through hole provided in the free access floor panel, the opening area of the through hole can be reduced, so when you pass over the floor after construction, your feet are caught or the wheels of the casters get in. You can prevent drooling.

If necessary, an adhesive agent reservoir (3a) is provided at least near the lower end of the cylindrical body (3). The adhesive agent reservoir (3a) has a function of temporarily accumulating the adhesive agent in the portion when the adhesive agent is adhered to the cylindrical body (3), and specifically, a hole, a depression, a groove. (Straight line, spiral) and the like. One or more of these adhesive reservoirs are provided on the cylindrical body. By providing the adhesive agent reservoir (3a), a larger amount of the adhesive agent is attached to the entire cylindrical body, and thereafter, a larger amount of the adhesive agent flows down from the cylindrical body to support the female screw (1c). It will be permeated and hardened in the gap between the bolts (2). Therefore, the cylindrical body having such a shape can be more firmly fixed to the female screw and the support bolt, or the inner wall of the through hole (1a) provided in the free access floor panel,
This is suitable for the case where the adhesive is attached only to the lower end portion of the tubular body in order to avoid the contamination of the support bolt of the portion not screwed with the female screw by the adhesive.

Further, it is desirable that the tubular body (3) has a color tone different from that of the free access floor panel (1) and the support bolt (2). Since the tubular body (3) has a color tone different from that of the free access floor panel (1) and the support bolt (2),
At the time of construction, it is preferable that the position where the support bolt is fixed and the position where the support bolt is not fixed can be more easily identified.

Next, the strength with which the female screw and the support bolt are fixed is 5 to the return torque strength after the adhesive is hardened.
It is preferably 40 kg · cm. The value of the return torque strength is greatly affected by the diameter of the screw, and when an equal amount of adhesive is applied per same adhesive area, the larger the screw diameter, the larger the return torque strength value. The resistance to loosening is not affected by the screw diameter and is evaluated only by the return torque value. If the return torque value is less than 5 kg · cm, the female screw and the support bolt tend to loosen due to vibration after construction, while if it exceeds 40 kg · cm, the female screw and the support bolt will be too firmly fixed, and the free When it becomes necessary to readjust the height of the access floor panel, it is difficult to loosen the female screw and the support bolt, which is not preferable.

In order to control the strength of fixation between the female screw and the support bolt within this range, either by selecting an adhesive or by a tentative test, to which part of the cylinder the adhesive is adhered to this range. It suffices to confirm whether the return torque strength of is obtained.

The adhesive used in the present invention is a known adhesive such as EVA-based, rubber-based, acrylic-based, silicon-based, epoxy-based, urethane-based, or a so-called organic solvent solution of a polymer. A screw lock agent is used, and among these adhesives, a one-component moisture-curable urethane adhesive is preferably used. The one-part moisture-curable urethane adhesive gradually cures while foaming by gradually reacting with the water adhering to the surface of the base material and the water in the air to generate carbon dioxide. The use of this adhesive exhibits the following merits and is therefore more preferable. The filling property is good because it cures with foaming. Since the cured product is a foam, the cohesive force is moderately weak, and the return torque value can be controlled at a low level. Therefore, when the height of the free access floor panel needs to be readjusted, the female screw and the support bolt can be easily loosened. The curing rate can be easily controlled by adjusting the content of isocyanate groups in the adhesive and the curing catalyst. Since foaming occurs upon curing, it is easy to visually confirm the curing. Since it is a one-liquid type, workability is easy. Adhesiveness is good regardless of the material of the adherend. Since it completely cures to the air contact part, it does not contaminate the periphery of the fixed part.

Next, in the fixing structure of the free access floor panel support bolt of the present invention, the groove (2b) for inserting a tool for rotating the support bolt into the head of the support bolt (2) extends to the outer periphery of the bolt. It is more desirable that the adhesive is adhered to the head and flows down through the groove, and further that the groove (2b) cut to the outer peripheral portion of the bolt is inclined. With this structure of the support bolt head, even if adhesive adheres to the support bolt head, it will flow down, so the groove will not be blocked by the adhesive and the height of the free access floor panel will not be blocked. When it becomes necessary to readjust the height, the work of loosening the female screw and the support bolt can be easily performed.

Further, it is desirable that the head of the support bolt (2) has a pyramid shape or a truncated cone shape. By doing so, the cylindrical body (3) with the adhesive can be easily inserted, which is convenient.

Further, it is more desirable that a rubber cap (2a) is attached to the lower end of the support bolt (2). By doing so, it is possible to prevent the free access floor panel and the floor surface from shifting and to improve vibration prevention and soundproofing.

On the other hand, the material of the cylindrical body (3) used in the fixing structure of the free access floor panel support bolt of the present invention is not particularly limited, and metal, wood, and synthetic resin can be used. There are synthetic resins, among them,
The height of the free access floor panel can be readjusted without the adhesive made of polyolefin resin or polyvinyl chloride resin being adhered to the pedestal (1b) and the support bolt (2) that make up the free access floor panel with an adhesive. This is convenient because the tubular body can be easily removed when it becomes necessary to perform the process.

The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a schematic perspective view showing the shape of a tubular body used in the fixing structure for a free access floor panel support bolt of the present invention. Among these, (A) is the cylindrical body (3) of the simplest form. (B) and (C) are cylindrical bodies (3) having a concave portion as an adhesive agent reservoir (3a) near the lower part. (D) shows the adhesive pool (3
It is a tubular body (3) having a through hole as a). (E)
Is a cylindrical body (3) having a spiral groove as an adhesive reservoir (3a) near the lower part. Further, in (F), the head of the tubular body (3) having the shape of (B) is covered except for the portion through which the tool passes. The tubular body in the shape of (F) is characterized in that it has a particularly large effect of preventing the foot from getting caught and the wheels of the caster from entering when passing over the floor after construction. Such a tubular body (3)
The adhesive attached to the base material flows down, penetrates into the gap between the female screw (1c) provided on the pedestal (1b) and the support bolt (2), and hardens.

FIG. 2 is a schematic view showing a state in which the fixing structure of the free access floor panel support bolts provided by the present invention is implemented, and FIG. 3 shows the free access floor panel support bolts shown in FIG. 2 from another angle. It is the seen schematic diagram. Free access floor panel from Figure 2 (1)
The pedestal (1b) with a female screw in the through hole (1a) provided in
It is understood that the height is adjusted by screwing the support bolt (2) into the pedestal (1b). 2 and 3, the head of the support bolt (2) has a shape in which the tip of a cone is cut, and a tool for rotating the support bolt is inserted in the flat portion of the head. Groove (2b) is cut to the outer periphery of the bolt,
Also, it can be seen that this groove is inclined.
Further, a rubber cap (2
a) is attached.

Further, as shown in FIG. 2, the adhesive (4) is attached to the vicinity of the lower end of the tubular body (3) having the adhesive reservoir (3a) near the lower end, and the adhesive is attached to the free access floor panel (1). It can be seen that the adhesive has been inserted into the provided through hole (1a), the adhesive has flowed down, has penetrated into the gap between the female screw (1c) and the support bolt (2), and has been cured.

[0018]

As described above, according to the present invention, there is provided a free access floor panel support bolt fixing structure capable of easily adjusting the height of the support bolt and surely fixing the support bolt. Further, in the present invention, since the cylindrical body is inserted into the through hole provided in the free access floor panel, the opening area of the through hole can be reduced. Therefore, when you pass over the floor after construction, your feet may get caught,
It is possible to prevent the wheels of the casters from entering.
Furthermore, since the amount of adhesive used can be controlled to an appropriate amount, the fixing strength between the female screw and the support bolt can be set to a necessary and sufficient value. Therefore, when it becomes necessary to readjust the height of the free access floor panel, the female screw and the support bolt can be easily loosened, which is convenient. As described above, the fixing structure of the free access floor panel support bolt of the present invention is effectively used in the construction of a free access floor, which has been in increasing demand in recent years with the spread of OA equipment.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the shape of a tubular body used in the fixing structure for a free access floor panel support bolt of the present invention.

FIG. 2 is a schematic view showing a state in which a fixing structure for a free access floor panel support bolt provided by the present invention is implemented.

FIG. 3 is a schematic view of the free access floor panel support bolt shown in FIG. 2 seen from another angle.

[Explanation of symbols]

 1: Free access floor panel 1a: Through hole 1b: Pedestal 1c: Female screw 2: Support bolt 2a: Rubber cap 2b: Groove 3: Cylindrical body 3a: Adhesive reservoir 4: Adhesive

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masanori Hara, 1515 Nakatsu-cho, Marugame-shi, Kagawa Okura Industrial Co., Ltd. 72) Inventor Matsuda ▲ Hide ▼ 1515 Nakatsu-cho, Marugame City, Kagawa Okura Industrial Co., Ltd. (72) Kimio Tatsumi 5-125 Higashiarioka, Itami City, Hyogo Prefecture Tori Co., Ltd.

Claims (9)

[Claims] 1. A through hole (1a) is provided at each of four corners, a pedestal (1b) with a female screw is attached to the through hole, and a support bolt (2) is screwed and inserted into the pedestal. In a free access floor panel (1) whose height is adjusted by depth, an adhesive is applied to a tubular body (3) whose inner diameter is larger than the outer diameter of the threaded portion of the support bolt and whose outer diameter is smaller than the inner diameter of the through hole. (4) is adhered and inserted along the outer periphery of the support bolt, and the adhesive flowing down from the tubular body is permeated and hardened in the gap between the female screw and the support bolt. Fixed structure. 2. The free access according to claim 1, wherein the tubular body (3) has an adhesive agent reservoir (3a) consisting of a hole, a recess, a groove, etc. at least near the lower end portion. Floor panel support bolt fixing structure. 3. The tubular body (3) according to claim 1, wherein the tubular body (3) has a color tone different from that of the free access floor panel (1) and the support bolt (2). Free access floor panel support bolt fixing structure. 4. The free access floor panel support according to claim 1, wherein the return torque strength between the female screw and the support bolt after the adhesive is cured is 5 to 40 kg · cm. Bolt fixing structure. 5. The fixing structure for a free access floor panel support bolt according to claim 1, wherein the adhesive is a one-component moisture-curable urethane adhesive. 6. A structure in which a groove (2b) for inserting a tool for rotating the support bolt into the head of the support bolt is cut to the outer periphery of the bolt, and the adhesive adhered to the head flows down through the groove. The structure for fixing a free access floor panel support bolt according to any one of claims 1 to 5, wherein: 7. The fixing structure for a free access floor panel support bolt according to claim 6, wherein the groove (2b) cut to the outer periphery of the bolt is inclined. 8. The supporting bolt head has a pyramid shape or a truncated cone shape so that a cylindrical body with an adhesive can be easily inserted. A structure for fixing a free access floor panel support bolt according to any one of claims 1 to 7. 9. The free access floor panel support bolt fixing structure according to claim 1, wherein a rubber cap (2a) is attached to a lower end of the support bolt (2).