JPH1136662A - Baseplate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate leveling and to eliminate the need to cut a part projecting from the upper surface of a baseplate after leveling. SOLUTION: This baseplate includes a baseplate main body 15 and a leveling mechanism for leveling the baseplate main body 15. In this case, the leveling mechanism includes a cylinder 17 having a thread groove on its inner peripheral surface secured to the lower part of a through hole 16 provided in the baseplate main body 15; a main leveling bolt 20 provided with a thread groove on its outer peripheral surface which can be threaded into the cylinder 17 from below, the thread groove in the leveling main bolt 20 being engaged with the thread groove in the cylinder 17; and an auxiliary leveling bolt 21 capable of being drawn out, which is inserted into the cylinder 17 from above via the through hole 16 and which is rotated integral with the main leveling bolt 20 to move the main bolt 20 up and down inside the cylinder 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated rubber support used as a seismic isolation / vibration-proof / vibration-proof member for building structures, civil engineering structures, equipment, and the like, and a base plate for mounting vibration-proof rubber.

[0002]

2. Description of the Related Art Conventionally, when a seismic isolation / vibration / vibration isolation member (hereinafter, collectively referred to as a "vibration isolation member") such as a laminated rubber bearing or an anti-vibration rubber is attached to a foundation of a structure, FIG.
For example, the following operation is performed using a base plate 3 provided with a level adjusting mechanism 2 at the outer edge of a steel plate 1 as shown in FIG.

[0003] First, an anchor frame 5 is mounted on concrete 4 cast as a foundation for a structure or the like, and a temporary installation is performed while positioning a base plate thereon.
That is, 4 of the rectangular plate 1 of the base plate 3
A tap hole 6 is provided at a corner, and a level adjusting bolt 7 is screwed downward into the tap hole 6 so as to be seated at a predetermined position on the anchor frame 5. Next, the head of the level adjustment bolt 7 is rotated with a spanner or the like to adjust the level of the plate 1 in the vertical direction. Thereafter, concrete 8 is poured under the plate 1, and then a grouting agent (not shown) is injected into the gap between the concrete 8 and the plate 1 and hardened, and a vibration isolating member (not shown) is placed on the plate 1. And fastened with bolts (not shown). FIG. 6 is an enlarged view showing the level adjustment mechanism 2. In FIG. 5, reference numeral 9 denotes a positioning leg,
Denotes a nut for fastening the vibration isolating member, and 11 denotes a stud for reinforcement, all of which are fixed to the lower surface of the plate 1 in advance. Further, reference numeral 12 denotes a grout injection hole.

[0004]

However, in such a method, as shown in the figure, the head of the level adjusting bolt 7 normally remains in a state of projecting from the upper surface of the plate 1 of the base plate 3, Appearance and safety aspects,
Furthermore, since there is a problem in workability when attaching or replacing the vibration isolating member, a portion protruding from the upper surface of the plate 1 has to be cut.

[0005] However, this cutting is usually performed by gas fusing in the field, which not only impairs the appearance but also has a problem of adversely affecting the rust preventive coating applied to the surface of the plate 1.

In view of this, instead of the tapped holes 6, as shown in FIG. 7, a nut 13 is fixed to the lower surface of the plate 1, and a level adjusting bolt 14 is screwed into the long nut 13 from below. Although a method of adjusting the level in the vertical direction by rotating the rotation of the anchor frame 14 is also performed, the adjustment work in a low position is not easy because the working posture is deteriorated (the height of the anchor frame is Usually, it is about 200 mm to 400 mm, and it is necessary to lower the working posture in order to rotate the bolt 14 seated on this upper surface.) The present invention has been made to cope with such a problem, It is an object of the present invention to provide a base plate that is easy to use and does not require cutting of a protruding portion from the upper surface of the base plate after adjustment.

[0007]

According to a first aspect of the present invention, there is provided a base plate including a plate-shaped base plate main body and a level adjusting mechanism for adjusting a level of the base plate main body. A cylindrical body having a thread groove on the inner peripheral surface fixed to the lower part of the insertion hole provided in the cylinder, and a thread groove screwed into the thread groove of the cylindrical body on the outer peripheral surface which can be screwed into the cylindrical body from below. A provided level adjustment main bolt, and a withdrawable level adjustment auxiliary bolt which is inserted into the cylinder from above through the insertion hole, rotates together with the main bolt, and moves the main bolt up and down into the cylinder. A base plate comprising:

In the base plate having such a configuration,
Since the level adjustment can be performed by rotating the level adjustment auxiliary bolt protruding above the base plate main body, the adjustment work is easy, and after the adjustment, the level adjustment auxiliary bolt can be pulled out, so that the protruding portion There is no need to cut off. Therefore, the appearance defect and the effect on the coating due to the cutting are prevented.

If a small hole penetrating in the radial direction is provided in the upper part of the cylindrical body, concrete or grout flows into the small hole, and a void or an insertion hole of the cylindrical body formed as a result of pulling out the level adjustment auxiliary bolt. Since the holes are filled, the appearance is further improved, which is more advantageous.

According to a second aspect of the present invention, there is provided a base plate having a plate-shaped base plate main body and a level adjusting mechanism for adjusting the level of the base plate main body, wherein the level adjusting mechanism has a screw hole at the center. A fixing plate supported and fixed to the base plate body by a connecting member such that the screw hole has an axis aligned with an insertion hole formed in the base plate body; and a screw of the fixing plate inserted from the insertion hole and inserted into the base plate body. And a level adjustment bolt screwed into the hole.

In the base plate having such a structure,
Because the level adjustment bolt can easily adjust the level from the base plate body, and after adjustment, the level adjustment bolt can be pulled out by cutting between the base plate body and the fixed plate, There is no need to cut the protruding part of the level adjustment bolt. In addition, the through hole after drawing is filled with concrete or grout agent, so the appearance is improved,
In addition, the effect on the coating is also prevented.

When the connecting member has a shape that exposes at least a part of the outer periphery of the inserted level adjusting bolt, the cut after the level adjustment can be easily cut at the exposed portion. More advantageous.

[0013]

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

FIG. 1 is a top view showing an example of the base plate of the present invention, FIG. 2 is a cross-sectional view showing a state where the base plate is temporarily installed on foundation concrete, and FIG. 3 is an enlarged view of a main part thereof.

In these figures, reference numeral 15 denotes a base plate body made of a steel plate or the like, and a plurality of insertion holes 16 for level adjustment are provided at the outer edge of the base plate body 15. A nut 17 having a thread groove on an inner peripheral surface is fixedly provided at a lower portion of each insertion hole 16, and an upper portion of the nut 17 serves as an inflow hole for allowing concrete or grout agent to flow in later. A small hole 18 that penetrates the nut 17 in the radial direction is provided.

In the nut 17, a level adjusting main bolt 20 into which a tightening nut 19 is previously inserted is screwed into the nut 17 from the lower side, and the main bolt 20 is inserted from above the base plate body 15. It rotates together with the level adjustment assist bolt 21 to be moved up and down in the nut 17. That is, the two bolts 20 and 21 are fitted to each other on the opposing surfaces to regulate their rotation.
For example, a hexagonal concave portion and a convex portion are provided respectively (in the example of the drawing, a concave portion (not shown) is provided on the upper surface of the level adjusting main bolt 20, and a convex portion is fitted to the distal end of the level adjusting auxiliary bolt 21. 21a).

The lower surface of the base plate body 15
A positioning leg 22, a nut 23 for fastening an anti-vibration member, a reinforcing stud 24 are fixedly provided, and a grout injection hole 25 is provided at the center in the conventional art. This is the same as that shown in FIG.

Next, a description will be given of a method of attaching the base plate 26 configured as described above.

As shown in FIG. 1, first, an anchor frame 28 is mounted on a foundation concrete 27, and
The level adjusting main bolt 20 of the base plate 26 is seated. Next, the level adjustment auxiliary bolt 21 is connected to the nut 17.
After adjusting the level of the base plate body 15 in the vertical direction, the head is rotated after the convex portion 21a at the tip is fitted into the concave portion on the upper surface of the level adjustment main bolt 20. .

After the level adjustment is performed in this manner, the tightening nut 19 previously inserted into the level adjusting main bolt 20 is tightened and fixed toward the nut 17, and then the level adjusting auxiliary bolt 21 is fixed. Pull it out from the nut 17,
A concrete 29 is cast under the base plate body 15 so as to cover the anchor frame 28, and a grouting agent (not shown) is injected and hardened. The mounting of the base plate 26 on the foundation concrete 27 is completed. At this time, concrete or grout is filled into the gap of the nut 17 and the insertion hole 16 through the small hole 18 provided in the nut 17, and the base plate 2
6 is completed.

In such a method, it is not necessary to cut the bolt head by gas fusing or the like after completion of the mounting of the base plate 26 as in the prior art, so that there is a possibility that the rust prevention coating on the surface of the base plate body 15 is adversely affected. In addition, since the nut 17 and the inside of the insertion hole are filled with concrete or the like, the appearance is excellent, and the safety and workability at the time of mounting and replacing the vibration isolating member are also good. In addition, since the level adjustment can be performed from the base plate main body 15, the work is also easy.

Next, another embodiment of the base plate of the present invention will be described.

FIG. 4A is a sectional view showing a main part of an example of another embodiment of the base plate of the present invention, and FIG. 4B is an enlarged view of the main part. In these drawings, the same reference numerals are given to portions common to FIG. 1 and duplicate description will be omitted.

In this example, the base plate body 1
A connection member 31 having an L-shaped cross section and having a fixing plate 30 having a screw hole at the lower end fixed to the lower peripheral portion of the insertion hole 16 provided in
The level adjustment bolt 32 inserted through the insertion hole 16 is screwed into the screw hole of the fixing plate 30. A tightening nut 33 is inserted into the level adjusting bolt 32 prior to screwing into the screw hole. Although not shown, the tightening nut 33 may be disposed below the fixing plate 30 or may be disposed both above and below.

In mounting such a base plate, first, the level adjusting bolt 32 is seated on the anchor frame 28, and then the head of the level adjusting bolt 32 is rotated to adjust the level of the base plate body 15 in the vertical direction. I do. Next, the fastening nut 33 is fastened and fixed toward the fixing plate 30. At this time, if necessary, the fastening nut 33 may be welded to the fixing plate 30. After this, the middle part of the level adjustment bolt 32,
That is, the level adjusting bolt 32 is cut between the base plate body 15 and the tightening nut 33 by gas fusing or the like, and the upper part is pulled out from the insertion hole 16. Next, concrete 29 is poured under the base plate body 15 so as to cover the anchor frame 28 in the same manner as in the above-described example, and a grout agent is injected and hardened. Concrete 29 or grout is filled in the insertion hole 16.

In such a method, a cutting operation below the base plate main body 15 is required. Therefore, although the workability is slightly inferior to the above-described example, a conventional bolt for protruding above the base plate main body 15 is cut. Unlike the method, there is no risk of causing poor appearance or adversely affecting the surface coating of the base plate. Further, the level adjustment operation itself can be performed from above the base plate main body 15, and the work of cutting the bolt below the base plate main body 15 is easier than the operation of rotating the bolt below the base plate main body 15 to perform the level adjustment. Since the time is short, the workability is superior to the conventional method in which the level adjustment must be performed in a low working posture.

[0027]

As described above, according to the base plate of the present invention, the level can be adjusted from above the plate, so that the operation is easy and the level adjusting bolt projecting above the plate is cut. Since there is no need, there is no inconvenience such as poor appearance or damage to the rust-proof coating on the base plate surface.

[Brief description of the drawings]

FIG. 1 is a top view illustrating an example of a base plate according to the present invention.

FIG. 2 is a sectional view showing a state where the base plate shown in FIG. 1 is temporarily installed.

FIG. 3 is an enlarged sectional view showing a configuration of a main part of the base plate shown in FIG. 1;

FIG. 4A is a cross-sectional view showing a main part of another example of the base plate of the present invention, and FIG.

FIG. 5 is a sectional view showing an example of a conventional base plate.

FIG. 6 is a sectional view showing an example of a conventional base plate.

FIG. 7 is a sectional view showing a main part of another example of a conventional base plate.

[Explanation of symbols]

 15 Base plate body 16 Insert hole 17 Nut 18 Small hole 20 Level adjusting main bolt 21 Level adjusting auxiliary bolt 21a Protrusion 26 Base plate 30 Fixing plate 31 Connecting member 32 Level adjustment bolt 33 Tightening nut

Claims (4)

[Claims] 1. A base plate comprising a plate-shaped base plate main body and a level adjusting mechanism for adjusting the level of the base plate main body, wherein the level adjusting mechanism is fixed to a lower part of an insertion hole provided in the base plate main body. A cylinder having a thread groove on an inner peripheral surface thereof; a level adjusting main bolt having a thread groove screwed into the thread groove of the cylinder on an outer peripheral surface capable of being screwed into the cylinder from below; A base plate, comprising: a level-adjustable auxiliary bolt which is inserted from above through the insertion hole, rotates together with the main bolt, and moves the main bolt up and down into a cylinder. 2. The base plate according to claim 1, wherein a small hole penetrating in a radial direction is provided in an upper portion of the cylindrical body. 3. A base plate comprising a plate-shaped base plate main body and a level adjusting mechanism for adjusting a level of the base plate main body, wherein the level adjusting mechanism has a screw hole at a center thereof, and the screw hole is provided in the base plate. A fixing plate supported and fixed to the base plate main body by a connecting member so that an axis thereof coincides with an insertion hole formed in the main body; and a level adjustment inserted from the insertion hole and screwed into a screw hole of the fixing plate. A base plate comprising: a bolt. 4. The base plate according to claim 3, wherein the connecting member has a shape exposing at least a part of the outer periphery of the inserted level adjusting bolt.