JPH11256679A - Joint metal of precast member and connecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the joint metal of a precast member and a connecting method, by which the precast member formed by division in a plate shape is connected and can be constituted in the L-shaped structure of a building easily and surely. SOLUTION: The joint metal of the precast member has the joint metal 1 for an upstanding Pca member consisting of a connecting plate 1a, to which boltholes 1a' are bored, and box nuts 1b installed at the places of the boltholes on the rear side of the connecting plate 1a. The joint metal is constituted of a joint metal 2 for a floor Pca member made up of a connecting plate 2a, to which boltholes 2a' are bored at places coinciding with the boltholes 1a', and an anchor member 2b mounted on the rear side of the connecting plate 2a and connecting bolts 3 screwed to the box nuts 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for manufacturing a building, particularly a balcony, a parapet, a rising handrail portion such as a corridor or a hall, and a floor portion or a stepped portion such as a stepped slab or a staircase.
The present invention relates to a metal fitting and a method for connecting a precast (PCa) member constituting a character-shaped structure.

[0002]

2. Description of the Related Art Conventionally, for example, precast balconies have been manufactured in an L-shape in which a rising handrail portion and a floor portion are integrated. For this reason, the rising handrail portion and the floor portion must be separately cast and placed, and the production is troublesome and costly. In addition, the L-shape has a problem that not only a large stock yard is required due to its three-dimensional shape and the transport efficiency is poor, but also a large one is heavy and difficult to handle.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to connect a precast member formed by dividing a flat plate into a building. L-shaped structure can be easily and reliably configured, as a result, not only can be manufactured easily and inexpensively a flat precast member,
An object of the present invention is to provide a connection metal fitting for a precast member and a connection method capable of efficiently and inexpensively performing stocking, transportation, and construction.

[0004]

The connecting hardware of the precast member according to the present invention is for a rising PCa member comprising a connecting plate having a bolt hole, and a cap nut attached to a bolt hole position on the back side of the connecting plate. A floor PCa comprising: a connection metal; a connection plate having a bolt hole formed at a position corresponding to the bolt hole; and an anchor member attached to the back side of the connection plate.
It is characterized by comprising: a connection metal for a member; and a connection bolt screwed into the cap nut. Further, an anchor bar is attached to the back side of the connection plate of the connection hardware for the rising PCa member. In addition, the floor PCa
It is also characterized in that anchoring bars are engaged with the anchor member of the member connecting hardware.

In the method for connecting a precast member according to the present invention, the connecting hardware for the rising PCa member is fixed to the rising PCa member among the connecting hardware, and the connecting hardware for the floor PCa member is fixed to the floor PCa member. The connection plates exposed on the connection surfaces of the PCa members are brought into contact with each other, the connection bolts are inserted through the bolt holes, and the PCa members are connected and fixed by tightening the cap nuts. In addition, a connection bolt is exposed at a connection portion of one of the slab PCa members, and a connection member for the floor PCa member having a frame shape is provided at a connection portion of the other slab PCa member. It is also characterized in that the connection bolt is inserted through a bolt hole drilled in the hole, and is tightened and fixed by a connection nut. In the present invention, the PCa member includes a semi-PCa plate such as an omnia plate.

[0006]

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a connection fitting for a rising PCa member, 2 denotes a connection fitting for a floor PCa member, and 3 denotes a connection bolt.

[0007] The connecting hardware 1 for the rising PCa member includes:
A connecting plate 1a having a plurality of (four in this embodiment) bolt holes 1a ', and a bolt hole 1a' on the back side of the connecting plate 1a.
And a C-shaped anchor bar 1c attached at an appropriate position on the back side of the connection plate 1a. When the fixing strength of the connection plate 1a can be sufficiently secured by the cap nut 1b, the anchor bar 1c can be omitted. Reference numeral 1d denotes a concrete filling hole for filling concrete on the back side of the connection plate 1a.

On the other hand, the connection hardware 2 for the floor PCa member
Are bolt holes 2a 'at locations corresponding to the bolt holes 1a.
A connecting plate 2a having an opening, an anchor member 2b attached to the back side of the connecting plate 2a and formed in a U-shaped groove, and a notch 2 for fixing streaks formed at the bottom of the anchor member 2b.
b 'and the anchoring line 2c engaged with the anchoring line cut 2b'
It is composed of When the fixing strength of the connection plate 2a can be sufficiently secured by the anchor member 2b, the fixing streaks 2c can be omitted.

FIG. 2 shows a longitudinal section in a state where the connection hardware 1 and 2 are fixed to a rising handrail PCa member 4 and a half floor PCa member 5 of a balcony, respectively. Of the connecting hardware 1 for the rising handrail PCa member,
Only the connection plate 1a is exposed at the connection surface, the cap nut 1b and the anchor bar 1c are embedded in the concrete of the rising handrail PCa member 4, and the connection plate 1a is fixed to the rising handrail PCa member 4.

The floor half PCa member 5 is a half PCa concrete product using a truss bar combining a top bar, a lower bar bar, and a lattice bar as a part of a main bar, and is an anchor of the floor PCa member connection hardware 2. The lower portion of the member 2b and the fixing streaks 2c are embedded in the concrete of the floor half PCa member 5, and the connecting plate 2a is fixed to the floor half PCa member 5. At least the connection plate 2a is exposed at the connection surface of the floor half PCa member 5.

FIG. 3 shows a connection state of the rising handrail PCa member 4 and the floor half PCa member 5 by the connection hardware 1 and 2, and the connection plate 1 of the two connection hardware 1 and 2 from the state of FIG.
a, 2a are brought into contact with each other and their bolt holes 1a 'and 2
The connection bolts 1a 'and 2a' are inserted into the bolts 1a 'and 2a', and the PC nuts 1b are fastened to connect the PCa members 4 and 5 together. When the rising handrail PCa member 4 and the floor half PCa member 5 are connected,
A cast-in-place concrete 6 is post-cast on the floor half PCa member 5.

As shown in FIG. 4, the rising P
A reinforcing bar 7 is arranged between the connection fittings 1 for the rising handrail PCa member fixed to the Ca portion 4 and cast-in-place concrete 6 is integrated with the floor half PCa member 5. I do. By applying a stress to the difference bars 7, the integrated structure of the connection hardware 1 and 2 can be reinforced to cope with high stress during an earthquake or the like.

The metal fittings 1 and 2 are fixed so as to fit between the reinforcing bars of the rising PCa portion 4 and the floor half PCa member 5. Although the floor half PCa member 5 is a half PCa member, it is configured as a full PCa member, and a recess is formed only in the insertion portion of the connection bolt 3 at the back of the connection plate 2a. May be filled with concrete.

FIG. 5 shows a stepped slab that is devised to improve the accommodation, such as a unit bath or equipment piping, and the stepped slab is composed of two slabs P.
The Ca members 8 and 9 are integrally connected and fixed by connection hardware 10 and 11. Reference numeral 12 denotes cast-in-place concrete as topping concrete.

FIG. 6 shows another embodiment of the connecting hardware of the stepped slab and the method of connecting the same. The connecting bolt 13 is exposed at the connecting portion of one slab PCa member 8 and the other slab PCa is connected. A connection fitting 14 for a frame-shaped floor PCa member is provided at a connection portion of the member 9, and the connection bolt 13 is passed through a bolt hole formed in the connection plate 14 a, and the connection bolt 13 is tightened and fixed by a connection nut 15. The connection bolt 13 is connected to the slab PCa.
It is fixed to the slab streaks 8a of the member 8 by welding or the like.
An anchor bar 9a of the slab PCa member 9 is attached to the bottom plate 14b of the floor PCa member connecting hardware 14 by welding or the like. Reference numeral 14c is a rib for reinforcing the connection hardware 14 for the floor PCa member.

[0016]

Advantages of the Invention 1) Precast members can be easily and reliably connected. 2) Since the rising PCa member and the floor half PCa member can each be a flat PCa member, flattening can be performed at the time of manufacturing, which not only reduces the cost of the steel plate form, but also reduces the assembly and distribution of the form. The labor of the streaks is also reduced, and labor is saved. In addition, the stocking and transportation can be carried out flatly or the weight can be reduced, so that the yard can be saved and the transportation cost can be reduced. 3) It is possible to streamline the construction of balconies and corridors of apartments and reduce costs. 4) The connecting hardware of the precast (PCa) member of the present invention and the method of connecting the same are particularly useful for building handrails such as balconies, parapets, corridors and halls, and floors, or steps such as stepped slabs and stairs. It can be used to construct L-shaped structures.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a connection hardware of the present invention.

2 is a diagram showing the connection hardware of FIG.
It is a longitudinal cross-sectional view of the state attached to each Ca member.

FIG. 3 is a standing handrail PCa member and a floor half PC of FIG. 2;
It is a longitudinal cross-sectional view of the connection state of a member.

FIG. 4 is a cross-sectional view showing a connection by a streak used with a connection fitting.

FIG. 5 is a cross-sectional view showing an example of a stepped slab.

FIG. 6 is a sectional view showing another embodiment of the stepped slab.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connection metal for rising wall PCa member 1a Connection plate 1a 'bolt hole 1b Cap nut 1c Anchor bar 1d Concrete filling hole 2 Connection metal for floor PCa member 2a Connection plate 2a' bolt hole 2b Anchor member 2b 'Cut for fixing bar 2c Anchoring bar 3 Connecting bolt 4 Rising handrail PCa member 5 Floor half PCa member 6 Cast-in-place concrete 7 Differential bar 8 PCa member 9 PCa member 10 Connection hardware 11 Connection hardware 12 Cast-in-place concrete 13 Connection bolt 14 Connection hardware for floor PCa member 14a Connection Plate 14b Bottom plate 14c Rib 15 Connection nut

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Keiji Kajiwara Tokyu Construction Co., Ltd., 1-16-14 Shibuya, Shibuya-ku, Tokyo

Claims (5)

[Claims] 1. A connection plate for a rising PCa member, comprising a connection plate having a bolt hole, and a cap nut attached to a bolt hole position on the back side of the connection plate; and a bolt hole at a position corresponding to the bolt hole. A connection plate, a connection hardware for a floor PCa member comprising an anchor member attached to the back side of the connection plate, and a connection bolt screwed to the cap nut;
A connection hardware for a precast member, comprising: 2. The connection metal fitting for a precast member according to claim 1, wherein an anchor bar is attached to the back side of the connection plate of the connection metal fitting for the rising PCa member. 3. An anchor member of the connecting hardware for floor PCa member, wherein a fixing bar is engaged with the anchor member.
Or the connection hardware of the precast member according to 2. 4. The connecting hardware according to claim 1, wherein the connecting hardware for the rising PCa member is fixed to the rising PCa member, and the connecting hardware for the floor PCa member is fixed to the floor PCa member. Connecting the connection plates exposed on the connection surface of the member to each other, inserting the connection bolt into the bolt hole, and tightening the cap nut to connect and fix both PCa members. Method. 5. A connection bolt for a connecting member of one slab PCa member is exposed, and a connecting member for a frame-shaped floor PCa member is provided at a connecting portion of the other slab PCa member.
A method for connecting a precast member, wherein the connection bolt is inserted into a bolt hole formed in a connection plate of the connection hardware for a floor PCa member, and is tightened and fixed by a connection nut.