JPH033014B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a column pedestal fixing device suitable for use in fixing column pedestals of prefabricated housing units and the like to foundations.

(Conventional technology) Traditionally, the fixing of column bases for prefabricated houses, etc.
This is done as seen in Publication No. 57-183303. In other words, while placing the end plate provided at the lower end of the pillar base of the house unit directly on the foundation,
An anchor bolt protruding from the upper surface of the foundation is inserted into a hole formed in the center of the end plate. and,
The column base is fixed by inserting a nut through an operation port formed at the bottom of the column base, screwing it onto the upper end of the anchor bolt, and tightening it with a tightening jig.

(Problem to be Solved by the Invention) However, with the above configuration, it is essential to tighten the nut to the upper end of the anchor bolt when fixing the column base, and the operation opening is narrow, so this tightening work is necessary. was complicated and hot. Furthermore, since the operation port is formed at the bottom of the column base, there is a drawback that the strength of the column base itself is reduced.

(Means for Solving the Problems) This invention has been made to solve the above problems, and its gist is to provide a device for fixing a column base to the upper surface of a foundation, in which (a) the legs are located inside the foundation; (b) a support fitting that is embedded in the support fitting and has a non-circular insertion hole in the upper plate part and is substantially horizontal away from the foundation; (b) located below the insertion hole of the support fitting and placed on the top surface of the foundation; (c) an end plate part provided at the lower end of the column leg and placed on the upper plate part of the support fitting, which is provided with an insertion hole having a spiral groove; (d) a spiral shaped elastic body; and a shank portion screwed to the end plate portion, and a locking portion formed on the lower side of the shank portion, and a lower end of the locking portion rotatably contacts the elastic body. The upper end surface of this locking part is formed into a non-circular shape that is approximately the same shape as or smaller than the insertion hole of the upper plate part, and rotates twice under the reaction force of the elastic body to close the upper plate part. (e) a connecting member that is latched to the lower surface of the upper plate part in a state that is shifted relative to the insertion hole; and (e) a grout material filled between the end plate part and the foundation. It is located on the column base fixing device.

(Function) The legs of the support metal fittings are buried in the foundation in advance, and the elastic body is placed therein. Fill the space between the end plate provided on the column base and the top surface of the foundation with grout material. On the other hand,
The spiral shank portion of the connecting member is screwed onto the end plate. Then, the column base is lowered to insert the locking portion of the connecting member into the non-circular insertion hole formed in the upper plate portion of the support fitting, and the lower end of the locking portion is brought into contact with the elastic body. When the column base is further lowered and placed on the upper plate portion of the support fitting, the upper end surface of the locking portion finishes passing through the insertion hole, and the connecting member receives the reaction force of the elastic body and rotates by a predetermined angle. As a result, the upper end surface of the locking portion is locked to the lower surface of the upper plate portion of the support fitting in a state that it is shifted from the insertion hole.

(Example) Hereinafter, the work of fixing a column base of a house unit of a prefabricated house using a column base fixing device which is an embodiment of the present invention will be explained in order.

As shown in FIG. 2, a concrete foundation 1 is constructed in advance at the construction site.

When the foundation 1 is constructed, the support fittings 10 are supported at the column base fixing positions. To be more specific, the support fitting 10 is formed of a gate-shaped metal plate in a symmetrical manner.
It has The upper plate portion 12 is provided with a non-circular insertion hole 13 having a cross-sectional shape similar to that of a rugby ball, for example.
is formed. The leg portion 11 includes an upper vertical portion 11a extending downward from the upper plate portion 12, and this vertical portion 11.
1, and a lower vertical portion 11c that extends further downward from the inclined portion 11b. In the foundation 1, main reinforcing bars 2 are arranged substantially horizontally along the longitudinal direction of the foundation 1, and the legs 11, 11 of the support fitting 10 are fixed to the main reinforcing bars 2. That is, the lower vertical portions 11c of the leg portions 11 are respectively placed on the main reinforcing bars 2, the bolts 3 are inserted through the lower vertical portions 11, and the nuts 4 screwed onto the bolts 3 are fixed. The bolt 3 is arranged below the main reinforcement 2 and is perpendicular to the main reinforcement 2.

In this state, the upper plate portion 12 of the support fitting 10 is spaced apart from the upper surface 1a of the foundation 1 by a predetermined distance.

Next, the upper surface 1a of the foundation 1 directly below the upper plate portion 12
A plate spring 20 (elastic body) is arranged at. Leaf spring 2
0 is formed symmetrically from a metal plate,
It has a flat plate part 21, vertical parts 22, 22 extending downward from both ends of the flat plate part 21, and collar parts 23, 23 extending horizontally outward from the lower ends of the vertical parts 22, 22. The flanges 23 are each fixed to the upper surface 1a of the foundation 1 with adhesive, nails (not shown), or the like.

Decorative tiles 6 are placed on the outer upper edge of the foundation 1. Further, a waste form frame 7 is arranged in a U-shape on the upper surface of the foundation 2 so as to surround the support fitting 10, and the tiles 6 and each waste form frame 7 are temporarily fixed with nails 8, and mortar 9 (grout material) is placed therein. ).

On the other hand, the column base 30 is made of steel and has a cylindrical shape with a rectangular cross section, and has an end plate portion 32 fixed to a lower end opening 31 by welding or the like. An insertion hole 33 is formed in the center of this end plate portion 32, and the upper surface 32
A square nut 35 is welded to a corresponding to the insertion hole 33. This nut 35 has a spiral groove 36 formed therein.

A connecting member 40 is attached to the end plate portion 32 of the column base 30. The connecting member 40 has a shank portion 41 having a spiral protrusion 41a, and a locking portion 42 formed on the lower side of the shank portion 41. The protrusion 41a has a large lead angle β, for example, 45°. The above locking part 42
has an arrowhead shape, and has an upper end surface 43 perpendicular to the axial direction of the shank portion 41 and a pointed lower end 4.
4. The upper end surface 43 is the support fitting 1
It is formed into a non-circular shape that is approximately the same shape or smaller than the insertion hole 13 of No. 0, so that it can be inserted into the insertion hole 13. Then, the shank portion 41 of the connecting member 40 is inserted into the insertion hole 33 of the end plate portion 32 from below, and the protrusion 41a is inserted into the nut 35.
screwed into the spiral groove 36 of.

In this attached state, the locking portion 42 of the connecting member 40
protrudes from the end plate portion 32. Distance d between the upper end surface 43 of the locking portion 42 and the lower surface 32b of the end plate portion 32
, the thickness t of the upper plate portion 12 of the support fitting 10, and the pitch p of the spiral protrusion 41a have the following relationship. d-t=p/4 As shown in FIG. 2, after filling the mortar 9 and before the mortar 9 has hardened, the column base 30 of the house unit is lifted by a crane or the like.
is lowered, the locking part 42 of the connecting member 40 is inserted into the insertion hole 13 of the support metal fitting 10, and the lower end 44 of the connecting member 40 is lowered.
is applied to the flat plate portion 21 of the leaf spring 20.

When the column base 30 is further lowered from this state,
As shown in FIG. 3, the upper end surface 43 of the locking portion 42
However, after passing through the insertion hole 13, the upper plate part 12
When the pillar pedestal 30 is further lowered away from the lower surface 12b, the pillar pedestal 30 rests on the upper plate portion 12 of the support fitting 10, as shown in FIG. When the locking portion 42 is released from the insertion hole 13 as described above, the reaction force of the leaf spring 20 and the spiral protrusion 41a,
Due to the guiding action of the groove 36, the connecting member 40 rotates and rises relative to the end plate part 32, and the upper end surface 43 of the locking part 42 touches the lower surface of the upper plate part 12 as shown in FIG. 12b. The upward movement distance of this connecting member 40 relative to the end plate portion 32 is equal to the aforementioned (d-t), and therefore equal to p/4. As a result, the connecting member 40 has been rotated by 90 degrees at the time when the locking portion 42 is locked to the upper plate portion 12 of the support fitting 10 (as shown by the imaginary line in FIG. 4). Note that since the mortar 9 is soft, when the column base 30 is placed on the support metal fitting 10 as described above, a part of it overflows from the gap between the waste mold frame 7 and the end plate part 32 and escapes to the outside. Then, as described above, the support fitting 10
The mortar is solidified in a state in which the connecting member 40 is locked.

In this way, the column base 30 can be easily connected by simply placing it on the upper plate part 12 of the support fitting 10. Further, unlike the conventional method, there is no need to tighten a nut, so there is no need to provide an operation opening at the bottom of the column base 30, and a decrease in the strength of the column base 30 can be prevented.

In the fixed state shown in FIG. 1, the downward load (compressive load) from the column base 30 can be received by the concrete foundation 1 via the support fittings 10.
Further, it can also be received by the foundation 1 through solidified mortar 9. In addition, when a tensile load is applied, the connecting member 40, the support fitting 10, the bolt 3
It can be received by main reinforcement 2 through. Further, the mortar 9 after solidification prevents the rotation of the connecting member 40 and supports the supporting metal fitting 1 when the above-mentioned tensile load is applied.
It also has the role of preventing it from going beyond zero.

This invention is not limited to the above-mentioned embodiments, and various embodiments are possible. For example, in the embodiments described above, the support metal fittings 10 may not be connected to the main reinforcement, but may be fixed to the foundation by other means.

(Effects of the Invention) As explained above, in this invention, by simply placing the end plate of the column base on the upper plate of the support metal, the connecting member screwed onto the end plate can be attached to the upper plate of the support metal. It can be connected, and the connection work is easy. Further, it is not necessary to provide an operation port for connection work at the lower part of the column pedestal as in the conventional case, and a decrease in the strength of the column pedestal can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a column pedestal fixing device which is an embodiment of the present invention, Figs. 2 and 3 are sectional views sequentially explaining the work of fixing the column pedestal, and Fig. 4 is in Fig. 3. - is a sectional view taken along the line. DESCRIPTION OF SYMBOLS 1...Foundation, 1a...Top surface, 9...Mortar (grout material), 10...Supporting metal fittings, 11...Legs, 12...Top plate part, 12b...Bottom surface, 13...
Insertion hole, 20... leaf spring (elastic body), 30... column base, 32... end plate portion, 33... insertion hole, 36...
Spiral groove, 40... Connection member, 41...
Shank part, 42...Locking part, 43...Top end surface,
44...Lower end.

Claims (1)

[Scope of Claims] 1. A device for fixing a column base to the upper surface of a foundation, in which: (a) the leg is embedded in the foundation, the upper plate has a non-circular insertion hole, and is spaced apart from the foundation to be substantially horizontal; (b) an elastic body located below the insertion hole of the support fitting and placed on the top surface of the foundation; (c) an elastic body provided at the lower end of the column base with a spiral groove. (d) a shank portion formed in a spiral shape and screwed onto the end plate portion; and a shank portion below the shank portion. a locking portion formed on the side, the lower end of this locking portion rotatably abuts the elastic body, and the upper end surface of this locking portion is approximately the same shape as or more similar to the insertion hole of the upper plate portion. a connecting member that is formed in a small non-circular shape and that rotates under the reaction force of the elastic body and is locked to the lower surface of the upper plate portion while being deviated from the insertion hole of the upper plate portion; (e) A column pedestal fixing device comprising grout filled between the end plate portion and the foundation.