JP2001081870A - Joint pin mounting device and prefabricated building installation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To vertically keep a joint pin for connecting an anchor member and a prefabricated building to each other regardless of placing pressure for foundation concrete. SOLUTION: The joint pin 3 is screw-engaged with an upper end part of the anchor bolt (anchor member). A horizontal plate 20 is integrally provided on the joint pin 3 by welding or the like. In four corners of the plate 20, screw holes 20b are formed. On the other hand, a support member 10 is fixed to a form 7. Four connecting shafts 30 are passed through the support member 10, and these connecting shafts 30 are respectively screw-engaged with the screw holes 20b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for installing a joint pin for connecting an anchor member to a unit building and a method for installing a unit building.

[0002]

2. Description of the Related Art The present applicant has filed a Japanese Patent Application No. 10-28552.
In No. 2, a device for correctly positioning and installing joint pins on a foundation to be cast in place was proposed. According to this, the lower end of a joint pin (an externally conical nut) is screwed into the upper end of a vertical anchor bolt (anchor member). Further, a connection shaft provided with an external thread is screwed into the upper end of the joint pin. A pair of nuts is screwed to the connection shaft. on the other hand,
A support member having a flat plate shape is horizontally arranged on a mold. The support member has a recess formed so as to be cut from the edge. The connection shaft is fitted into the recess, and the support member is sandwiched between a pair of nuts from above and below. Then, after adjusting the horizontal position, level (vertical position), and verticality of the joint pin, the pair of nuts are tightened to the support member.

[0003] Thereafter, anchor concrete is cast into the formwork to bury the anchor bolts, and joint pins are projected from the foundation concrete. After the foundation concrete has hardened, the formwork and the supporting members are removed, and the connecting shaft is removed from the joint pin. Then, the unit building is installed on the foundation concrete, and a joint bolt is screwed into an upper end portion of the joint pin to connect the unit building to the joint pin.

[0004]

In the device according to the above-mentioned prior application, the joint pin and the anchor bolt have a single-point support structure supported by one connecting shaft coaxial with the joint pin and the anchor bolt. However, there is a problem that the inclination is not sufficient and the base concrete is easily inclined due to the casting pressure or the like.

[0005]

In order to solve the above problem, the invention according to claim 1 is for connecting an anchor member buried in foundation concrete and a unit building installed on the foundation concrete. A joint pin installation device for installing a joint pin so as to protrude vertically from an upper surface of the foundation concrete while being connected to the anchor member, wherein (a) a formwork for placing the foundation concrete. A supporting member fixed to the supporting member, and (b) the joint pin is provided horizontally at a distance below the supporting member, and the joint pin is erected in a central portion, and screw holes are respectively provided at positions away from the joint pin in four directions. A formed plate, and (c) an operating portion that is rotated and extends from the operating portion, penetrates the support member rotatably, and Characterized in that a four connecting shaft having a male screw portion to be screwed into the screw hole of the rate.

According to a second aspect of the present invention, in the first aspect, the connecting shaft has a thumbscrew shape.

According to a third aspect of the present invention, there is provided a method for installing a unit building, wherein (a) a support member and (b) a joint pin is erected at a central portion, and screws are respectively provided at positions away from the joint pin in four directions. A plate with holes formed,
(C) preparing an operation part and four connection shafts having a male screw part extending from the operation part, connecting an upper end of the anchor member to a lower part of the joint pin, and setting the plate below the support member; Is placed horizontally apart from the above 4
With the male threads of the two connection shafts penetrating the support member and screwing into the screw holes of the plate, the support member is fixed to the formwork, and then foundation concrete is poured into the formwork. The anchor member is buried in the foundation concrete, and the joint pin is protruded above the foundation concrete. After the foundation concrete is hardened, the connection shaft and, consequently, the support member are removed from the plate. A unit building is installed on concrete, and the unit building is connected to the joint pin.

According to a fourth aspect of the present invention, in the third aspect, the operating portion of the connecting shaft is maintained in a state in which the operating portion of the connecting shaft abuts against the support member before the foundation concrete is cast or before the concrete is hardened. While turning, the verticality and level of the joint pin are adjusted.

The invention according to claim 5 is the invention according to claim 3 or 4.
In, the plate is positioned above the foundation concrete and separated from the upper surface, after the foundation concrete is hardened, a non-shrink mortar is provided between the foundation concrete and the plate, and the unit building is placed on the plate. It is characterized by putting.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a unit building B installed on a foundation A. The foundation A is cast in place, and anchor bolts 2 (anchor members) are vertically embedded in foundation concrete 1. The pillar 4 of the unit building B is connected to the anchor bolt 2 via the joint pin 3.

As shown in FIG. 2, the joint pin 3 has a small-diameter screw hole 3a extending from the upper end thereof along the axis thereof and a large-diameter screw hole 3b extending from the lower end thereof. Are formed. The upper end of the anchor bolt 2 is screwed into the lower screw hole 3b. The joint pin 3 has a conical shape from the middle part. On the other hand, a conical joint member 5 is provided at the lower end of the column 4. The joint pin 3 is fitted into the joint member 5. The joint bolt 6 passes through the joint member 5 and is screwed into the screw hole 3a of the joint pin 3.

In the above connection structure, the joint pin 3 must be provided on the foundation A so as to be correctly positioned. Therefore, as shown in FIG. 3 and FIG.
At the time of construction, a joint pin installation device is used. The apparatus comprises a support member 10, a plate 20 disposed below the support member 10,
And four connecting shafts 30 for connecting the plate 20.

The support member 10 comprises a horizontal frame 11, a pair of vertical plates 12 extending vertically upward from left and right ends of the frame 11, and a pair of right and left extending from upper ends of the vertical plates 12. And a locking portion 13. Four semicircular convex pieces 14 are provided on the inner edge of the frame 11, and through holes 14 a are respectively formed in these convex pieces 14.

The plate 20 has a square shape, a pin mounting hole 20a is formed at the center, and a screw hole 20b is formed at each of the four corners (at positions separated from the pin mounting hole 20a in four directions). (See FIG. 1). Pin mounting hole 20a
The joint pin 3 is fitted so as to be orthogonal to the plate 20, and the conical upper portion of the joint pin 3 is erected on the plate 20. The joint pin 3 and the plate 20 are integrated by, for example, welding.

The connecting shaft 30 has an operating portion 31 and a male screw portion 32 extending from the operating portion 31, and has a thumb screw shape. The male screw portion 32 is formed in the through hole 14
a and can be screwed into the screw hole 20b of the plate 20.

A method of constructing a foundation using the above-described apparatus will be described with reference to FIG. First, the upper end of the anchor bolt 2 is connected to the lower part of the joint pin 3. Then, the support member 10 and the plate 20 are vertically separated from each other, and the male screw portions 32 of the four connection shafts 30 are connected to the support member 10.
Through the through hole 14a and screwed into the screw hole 20b of the plate 20. As a result, the plate 20 becomes 4
Points will be supported.

Next, the locking portion 13 of the support member 10 is
Place on top of The space between the left and right vertical plate portions 12 of the support member 10 is smaller than the space between the left and right molds 7 and the support member 10
Can be slightly moved left and right. by this,
The positioning of the joint pin 3 in the left-right direction can be performed. In addition, by moving the support member 10 in the front-rear direction (the direction orthogonal to the paper surface in FIG. 3), the positioning of the joint pin 3 in the front-rear direction can be performed. After positioning the joint pin 3 in the horizontal direction (front-back, left-right direction) in this manner, the left and right locking portions 1
3 is fixed to the formwork 7 by a vice 8 (fixing means).

Next, by rotating the operating portion 31 of the connecting shaft 30 while keeping the operating portion 31 in contact with the plate 20, the verticality and the level of the joint pin 3 are adjusted. That is, when each connection shaft 30 is turned, a corner portion of the plate 20 corresponding to the connection shaft 30 is raised or lowered. Thereby, the inclination of the plate 20 can be corrected and the plate 20 can be made horizontal. Whether or not the plate 20 is horizontal can be measured by placing a levelness measuring means such as a leveler on the upper surface of the plate 20. When the plate 20 is horizontal, the joint pin 3 is vertical, and thus the anchor bolt 2 is vertical. When the four connecting shafts 30 are turned by the same amount, the plate 20 moves up and down in parallel. Thereby, the level of the joint pin 3 can be adjusted. The level can be measured by placing a level measuring means such as a staff (auto-leveler) on the upper surface of the plate 20.

Then, the foundation concrete 1 is cast into the formwork 7 and the anchor bolt 2 is embedded. In this casting step, even if the pressure of the concrete 1 is applied to the anchor bolt 2, the plate 20 is moved by the four connecting shafts 30.
Since the anchor bolts 2 and the joint pins 3 are horizontally supported at the points, the anchor bolts 2 and the joint pins 3 are not inclined, and can maintain the verticality.

The upper surface of the foundation concrete 1 is a plate 20
When it comes to a position slightly below, the driving is finished. Before the foundation concrete 1 hardens, the horizontal position, the level and the verticality of the joint pin 3 are measured again just in case, and if any deviation occurs, the same method as before the casting is used. Adjust it.

After the foundation concrete 1 has hardened, the connecting shaft 30
Is removed from the plate 20. Also, remove vise 8,
The support member 10 and the mold 7 are removed.

Next, as shown in FIGS. 1 and 2, a non-shrink mortar 9 is laid around the joint pin 3 on the foundation concrete 1. The upper surface of the non-shrink mortar 9 is flush with the upper surface of the plate 20. Thereafter, the column 4 of the unit building B is placed on the plate 20, and the column 4 and the joint pin 3 are connected. Since the joint pin 3 is installed with accurate horizontal position, level and verticality,
The columns 4 can be easily and reliably connected. Since a gap corresponding to the thickness of the non-shrink mortar 9 is formed between the unit building B and the foundation A, ventilation under the floor can be achieved.

The present invention is not limited to the above embodiment, but can adopt various forms. For example, joint pin 3
Alternatively, the anchor bolt 2 may be integrated by welding or the like. The joint pin 3 may be screwed to the plate 20. The operation unit 31 of the connection shaft 30 may be rotated by a tool. After connecting the support member 10 and the plate 20 with the connection shaft 30, the anchor bolt 2 may be connected to the joint pin 3.

[0024]

As described above, according to the first and third aspects of the present invention, the plate can be horizontally supported at four points by the four connection shafts, so that the stability is high and the verticality of the joint pin is high. Can be reliably maintained. In the invention according to the second aspect, the operating portion of the connecting shaft can be turned without using a tool. In the invention according to claim 4, the level and the verticality of the joint pin can be easily adjusted by the four connecting shafts. In the invention according to claim 5, the level and the horizontality of the plate, and thus the level and the verticality of the joint pin, can be accurately adjusted, and by forming a convex part on the upper surface of the foundation concrete with non-shrink mortar. Therefore, a gap can be formed between the unit building and the foundation concrete, and ventilation under the floor can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view showing a state where a unit building is installed on a foundation.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a cross-sectional view showing a construction process of the foundation of FIG. 2 in a state where foundation concrete is cast.

FIG. 4 is an exploded perspective view of the joint pin installation device of FIG.

[Explanation of symbols]

 B Unit building 1 Foundation concrete 2 Anchor bolt (anchor member) 3 Joint pin 7 Formwork 10 Support member 20 Plate 20b Screw hole 30 Connecting shaft 31 Operation part 32 Male screw part

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Jun Chiyomatsu 32 Wadai, Tsukuba, Ibaraki Pref. Sekisui Harmonate Construction Technology Center

Claims (5)

[Claims] 1. A joint pin for connecting an anchor member buried in a foundation concrete and a unit building installed on the foundation concrete, from a top surface of the foundation concrete in a state of being connected to the anchor member. A joint pin installation device for installation so as to protrude vertically, (a) a support member fixed to a formwork for placing the foundation concrete, and (b)
A plate which is horizontally arranged at a distance below the support member, the joint pin is erected at a central portion, and a screw hole is formed at a position separated from the joint pin in four directions; And four connecting shafts extending from the operating portion, rotatably penetrating the support member, and having a male screw portion screwed into a screw hole of the plate. Joint pin installation device. 2. The joint pin installation device according to claim 1, wherein the connecting shaft has a shape of a thumbscrew. (A) a supporting member; and (b) a plate having a joint pin erected at a central portion thereof and having screw holes formed at four positions away from the joint pin.
(C) preparing four connecting shafts having an operating part and a male screw part extending from the operating part, connecting an upper end of the anchor member to a lower part of the joint pin, and setting the plate below the support member; The support member is fixed to a mold in a state where the male screw portions of the four connection shafts are passed through the support member and screwed into the screw holes of the plate. Casting the foundation concrete in the formwork, burying the anchor member in the foundation concrete, and projecting the joint pin onto the foundation concrete. After the foundation concrete is hardened, the connection shaft is removed from the plate. Eventually, the support member is removed, and then a unit building is installed on the foundation concrete, and the unit building is connected to the joint pins. A method for installing a unit building, comprising: 4. Before the foundation concrete is poured or before it is set and before it is hardened, the connecting shaft is turned while being kept in contact with the support member, and the verticality and the level of the joint pin are adjusted. The unit building installation method according to claim 3, wherein: 5. The non-shrink mortar is provided between the base concrete and the plate after the base concrete is hardened, wherein the plate is located above the top surface of the base concrete. The unit building installation method according to claim 3 or 4, wherein the unit building is mounted.