JP3039291B2 - Formwork for connection between precast concrete beam and column capital - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork for connecting a PC (precast concrete) beam to a capital.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 10, a RPC (precast reinforced concrete)
Receiving brackets 46 vertically arranged along the outer edge of the end of each adjacent RPC beam 42 bridged over the head of the PC column 41.
In the meantime, by dropping both ends of the corner member 48 having an L-shaped flat cross section made of slate, and closing the gap between the adjacent beams 42, the gap between the adjacent beams 42 can be accurately determined. It is known to fill the gap (Japanese Patent Laid-Open No. 6-10406).

[0003] As shown in FIGS. 8 and 9, a connection for finishing a connection between a column 1 of a structure and a PC (precast concrete) beam 2 placed on a column head 1 a of the column 1. A mouth frame, comprising: a frame body 11 attached to a side surface of the PC beam 2 adjacent to each other to cover a gap between the adjacent PC beams 2;
Is composed of a first member 52 fixed to one side of a pair of opposing side surfaces of the PC beam and extending to the other side, and a second member 53 fixed to the other side of the side surface and extending to one side, The first member 52 and the second member 53 are connected to each other with their ends wrapped so as to cover the connection structure of the column 1 and the PC beam 2. A frame is also known (Japanese Utility Model Application Laid-Open No. 4-113655).

[0004] As described above, the form body 11 is composed of the first member 52 and the second member 53 fixed to the PC beam 2, and the first member 52 and the second member 53 are connected to each other. When the part is wrapped, the position of the wrap portion formed by the first member 52 and the second member 53 moves in accordance with the position of the PC beam 2, so that the PC beam 2 is installed. Both PC beams 2 adjacent to each other by absorbing the error generated in the position
Can be formed corresponding to the installation position of the mold.

[0005]

However, in the joint form shown in FIG. 10, a large number of form fittings 46 as shown in FIG. 11 must be prepared, and these must be correctly attached to predetermined positions of the beam 2. It takes time.

8 and 9, the first member 52 and the second member 53 are fixed to the PC beam 2 such that the ends overlap each other to form the mold body 11. The first and second members 5 on the left and right
Setting the mounting positions of 2, 53 exactly at desired positions;
That is, it is difficult to finely adjust the form body 11 in the lateral direction (left and right).
In particular, the first member 52 and the second member 53 are liable to cause a change in lateral pressure at the time of concrete casting, and it is desired that there be no such side pressure change and fine adjustment is performed.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a precast concrete beam and a stigma which can be easily mounted without a metal fitting for formwork as shown in FIG. Another object of the present invention is to provide a formwork for connection with a part.

Another object of the present invention is to provide a connection formwork between a precast concrete beam and a column head, which can easily finely adjust a mounting position of a formwork body and set it at a desired position.

[0009]

In order to achieve the above object, a formwork for connecting a precast concrete beam and a column capital according to the present invention is mounted on a column of a structure and on the column capital of the column. In order to finish a connection with a precast concrete beam, in a connection formwork having a formwork body that covers a gap between adjacent beams, a metal member receiving a reaction force around a column cap of the column. A steel form body having an L-shaped flat cross section is installed on the metal body, and a pipe is provided on the outside of the form body in a vertical direction, and a through bolt is inserted into the pipe. The bolts are configured to apply a compressive force vertically between the reaction receiving metal and the upper precast concrete floorboard to resist lateral pressure during concrete casting (claim 1).

[0010] Preferably, the form body has a sliding edge at its lateral end that can be pulled out toward the precast concrete beam.

[0011]

According to the first aspect of the present invention, by turning a through bolt inserted into a pipe provided in a vertical direction on the formwork body, the through bolt is vertically moved between the reaction receiving metal and the upper precast concrete floor plate. Apply compressive force to the concrete to resist lateral pressure during concrete casting. For this reason, it is not necessary to use the conventional metal mold mounting hardware as shown in FIG. 11 for mounting the metal frame main body, and the mounting can be performed very easily.

According to the second aspect, the lateral edge of the form body has a slide edge that can be pulled out toward the precast concrete beam, so that fine adjustment in the lateral direction can be performed in connection with the precast concrete beam.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments.

1 and 2, reference numeral 1 denotes a pillar of a structure;
Numeral 2 denotes a PC (precast concrete) beam, and the end of the precast concrete beam 2 is placed on the capital 1a from four sides as shown in FIG. 8 or FIG. 3 is an upper precast concrete floorboard.

Reference numeral 10 denotes a connection formwork for finishing a connection with the precast concrete beam 2 placed on the column head 1a of the column, and covers a gap between adjacent beams. A mold body 11 is provided. The formwork body 11 is made of a steel member having an L-shaped flat cross section, and has, at both lateral ends thereof, slide edges 12 which can be pulled out toward the precast concrete beam 2 as shown in FIG. . In other words, the steel form body 11 can be slid at the time of engagement with the precast concrete beam 2, so that fine adjustment in the lateral direction is possible. Reference numeral 13 denotes a bolt that penetrates a horizontally elongated hole provided in the slide edge 12, and is tightened and fixed after the form body 11 is positioned at a predetermined position.

The form body 11 has a flange 14 running laterally on the outer periphery at the upper surface and at an intermediate height position. In addition, the form body 11 is formed so as to penetrate these flanges 14 and to vertically extend a steel pipe 1 at the outer peripheral corner.
5 is provided, and a through bolt 16 is inserted into the pipe 15. On the other hand, reaction force receiving metal members 17 made of metal fittings such as angles having an L-shaped cross section are attached to the four circumferences of the column head 1a of the column 1.

As shown in FIG. 5, the threaded portion 16a of the through bolt 16 is formed by a male thread at the upper end thereof.
5, the bolt head 16b at the lower end of the through bolt 16 passes through the lowermost flange portion 14, and is connected to the reaction force receiving hardware 17 via the rotation receiving seat 18. Supported.

Accordingly, by turning the bolt head 16b and feeding it out of the form body 11, the through bolt 16 is stretched between the reaction force receiving hardware 17 and the upper precast concrete floor plate 2. At this time, the pipe 15 functions as a buckling stopper for the through bolt 16. This through bolt 16
The vertical compressive force generates a force that resists the lateral pressure when the concrete is poured into the form body 11.

A positioning member 20 for determining a correct disposition position in the horizontal plane of the form body 1 is provided around the column by using the reaction force receiving metal member 17. That is, a clamp member 21 having an L-shaped guide member 23 fixed to the top is attached to the reaction force receiving hardware 17 by the tightening screw 22. As shown in FIG. 7, each L-shaped guide member 23 is fixed in position so as to contact and guide the outer peripheral edge of the lowermost flange portion 14. Reference numeral 24 denotes a handle provided on the form body 11 so that the form body 11 can be gripped.

With such a configuration, (1) the position of the mold body 11 is determined on the inner surface of the guide member 23,
(2) With the position maintained, the slide edge 12 is pulled out and brought into contact with the side surface of the precast concrete beam 2, and (3) the bolt head 16b of the through bolt 16 is turned up and down to extend the mold. The frame body can be mounted as desired. Therefore, the following advantages can be obtained. (a) The column and beam joint formwork is simple and easily settable. (b) The amount of metal fittings for formwork can be reduced. (c) Fine adjustment in the lateral direction is possible in connection with precast concrete beams.

In FIG. 1 and FIG. 3, a small screw type jack 30 is provided on a reaction force receiving metal member 17 attached to the four circumferences of the column head 1a of the precast concrete column 1 while being held by a holder 31. ing.
The jack 30 has left and right wedge-shaped moving pieces 34, 34 sandwiched between an upper lifting / lowering plate 32 and a lower fixed plate 33 which are tapered so that the outer side in the lateral direction becomes thinner. 34, 34 are engaged with one feed screw 35 penetrating the center in the opposite relationship of a right-hand screw and a left-hand screw. The moving pieces 34, 34 are moved closer to each other to raise the elevating plate 32, and are turned in the other direction so that the moving pieces 34, 34 can be moved away from each other and lowered.

The jack 30 is previously disposed on the reaction force receiving hardware 17 when the precast concrete beam 2 is installed. Next, the precast concrete beam 2 is placed thereon. In this state, the level of the precast concrete beam 2 is adjusted by operating the jack 30.

According to the work of installing the precast beams, the crane can be quickly separated from the hand and the leveling accuracy can be easily secured. Therefore, the setting of the precast concrete beam is greatly simplified.

In the above embodiment, the upper end of the through bolt 16 is screw-engaged with the upper part of the inside of the pipe 15 of the form body 11.
As shown in FIG. 6, the lower threaded portion 16a of the bolt 16 is threadedly engaged with the lower portion of the pipe, and the upper end is abutted against the precast concrete beam 2. It can be stretched between and can be compressed. In this case, the clamp member 21 is used as a connecting member between the form body 11 and the reaction force receiving hardware 17 as illustrated.

In the above embodiment, the screw type jack has been described, but a hydraulic type jack or the like may be used if necessary.

[0026]

As described above, according to the present invention, the following excellent effects can be obtained.

According to the first aspect of the present invention, by turning through bolts inserted into pipes provided in the up-down direction on the form body, the metal of the reaction force receiving member and the upper precast concrete floor plate can be moved between the metal members. A compressive force can be applied to the through bolt up and down to resist the lateral pressure during concrete casting. For this reason, it is not necessary to use the conventional metal mold mounting hardware as shown in FIG. 11 for mounting the metal frame main body, and the mounting can be performed very easily.

According to the second aspect of the present invention, since the slide edge is provided on the formwork body, fine adjustment in the lateral direction can be performed in connection with the precast concrete beam.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a formwork for a connection between a PC beam and a column capital according to the present invention.

FIG. 2 is an enlarged view of a through bolt portion of FIG.

FIG. 3 is an enlarged view of a jack part of FIG. 1;

FIG. 4 is a view showing a sliding edge of the mold body of FIG. 1;

FIG. 5 is a diagram for explaining how a compressive force is applied to the through bolt of FIG. 1;

FIG. 6 is a diagram showing another configuration for applying a compressive force to the through bolt of FIG. 1;

FIG. 7 is a partial cross-sectional view showing a configuration of a guide member portion of FIG.

FIG. 8 is a perspective view showing a conventional connection formwork between a PC beam and a column capital.

FIG. 9 is a plan view showing a connection formwork between the PC beam and the column capital of FIG. 8;

FIG. 10 is a perspective view showing a conventional RPC column-beam joint.

FIG. 11 is a view showing a part of the receiving fitting of FIG. 10;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Column of structure 1a Column cap 2 Precast concrete beam 3 Upper precast concrete floorboard 10 Formwork for connection 11 Formwork body 12 Sliding edge 13 Bolt 14 Flange 15 Pipe 16 Through bolt 16a Screw part 16b Bolt head 17 Reaction force Receiving hardware 18 Rotation receiving seat 20 Positioning member 21 Clamp member 22 Tightening screw 23 L-shaped guide member 24 Handle 30 Jack 31 Holder 32 Lifting plate 33 Fixing plate 34 Wedge-shaped moving piece 35 Feed screw 41 RPC pillar 42 RPC beam 46 Receiving bracket 48 Outer corner member 52 First member 53 Second member

Claims (2)

(57) [Claims] 1. A formwork body for covering a gap between adjacent beams in order to finish a connection between a column of a structure and a precast concrete beam placed on a column head of the column. In the formwork for the connection to be made, a metal fitting for receiving a reaction force is attached around the column cap of the column, a steel mold body having an L-shaped flat cross section is placed on the metal fitting, and the formwork body is attached to the metal body. A vertical pipe is provided on the outer part thereof, and a through bolt is inserted into the pipe, and a compressive force is applied to the bolt vertically between the metal receiving the reaction force and the upper precast concrete floor plate, and the concrete is A formwork for connection between a precast concrete beam and a column capital, characterized by resisting lateral pressure during casting. 2. The joint between a precast concrete beam and a column capital according to claim 1, wherein the formwork body has a sliding edge at a lateral end thereof which can be drawn out toward the precast concrete beam. Formwork.