JPH0662007U - Concrete pillar material - Google Patents

Abstract

(57) [Summary] [Purpose] For precast concrete column materials, it is possible to construct from the side of the main bar and steel. [Structure] A pair of concrete frames 1 in which one side is opened, a lath 3 is attached to the inside, and a hoop streak 5 is arranged on the outside of the lath 3 are connected to form a concrete pillar material A. [Effect] The concrete pillar material A can be constructed by connecting the concrete frame 1 from the side of the main bar or the steel material B that has been preliminarily constructed, and the work is easy. Further, the cast concrete 12 bites into the lath 3, and the cast concrete 12 and the pillar material A are firmly integrated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a concrete column material used in a concrete building.

[0002]

[Prior art]

 Conventionally, as a concrete precast pillar material that does not require formwork, one shown in Fig. 6 is known. This has a structure in which a lath 22 is attached to the inside of a box-shaped concrete body 21 and a hoop 23 is arranged outside the lath. The main bar 24 is constructed on site.

[0003]

[Problems to be solved by devising]

 Since the above-mentioned conventional concrete pillar material is a box type, it must be installed by inserting it from above the main bar or steel material that has been erected in advance, which makes the work difficult. In addition, it is difficult to bind the hoop reinforcement integrated with the concrete pillar and the main reinforcement installed on site.

[0004]

[Means for Solving the Problems]

 The concrete pillar material of the present invention is constructed by connecting a set of concrete frame bodies having one open side with hoop streaks with the opening inside. The concrete frame has a structure in which a lath is attached to the inside and a hoop reinforcement is provided outside the lath (Claim 1), or a main reinforcement is provided inside the hoop reinforcement at a corner of the concrete frame. (Claim 2) According to the invention of claim 3, a connecting sleeve for connecting the main bars of the vertically adjacent concrete columns is fixed to the lower end or the upper end of the main bar. In the invention of claim 4, the end of the hoop muscle is formed into a loop shape, and the hoop muscles can be easily connected to each other.

[0005]

[Action]

 Since the pillars are constructed by combining the concrete frames with one side open, the concrete frames are installed from the side of the main bars and steel that were erected upright at the time of construction, and the hoops of each concrete frame are installed. Columns are constructed by connecting the muscles. In the invention of claim 1, since the main bar is not arranged in the concrete frame body, the main bar is constructed in advance. However, in the invention of claim 2 or 3, since the main bar is arranged in the concrete frame body, It is not necessary to construct the main bar or bind the main bar and the hoop bar on site. Further, according to the invention of claim 3, since the connecting sleeves are fixed to the ends of the main bars, the main bars of the upper and lower frames can be firmly connected when the concrete frames are piled up and down. . Further, according to the invention of claim 4, by inserting the reinforcing bar into the loop-shaped portion formed at the end of the hoop muscle, the hoop muscles of the frame bodies to be combined can be easily connected.

[0006]

【Example】

 1 to 3 show a first embodiment (corresponding to claim 2) of the present invention. A concrete pillar material A is formed by combining a pair of concrete frames 1 and 1 each having a U-shaped cross section and an opening on one side. Each concrete frame 1 has a triangular thick portion 2 formed at a corner, and an expanded metal 3 is attached as a lath to the entire inner surface. Three main bars 4 are arranged above and below the thick portion 2, and a hoop bar 5 is arranged and fixed on the outside of the main bar 4. The end of the hoop reinforcement 5 projects from the open end of the concrete frame to form a loop-shaped portion 5a, and the connecting rebar 6 is inserted into the loop-shaped portion 5a so that the two concrete frames 1, 1 Are connected. A screw sleeve joint 7 is fitted and fixed to the lower end of the main bar 4 as a connecting sleeve, while the upper end of the main bar 4 projects from the upper end of the concrete frame 1 and is overlaid on the screw frame 7 of the concrete frame. It is designed so that it can be fixed by injecting mortar after fitting. In the figure, reference numeral 7a is a mortar inlet, and 7b is a mortar outlet. A bolt 8 for attaching the width stop plate is fixed to the outside of the opening end of the concrete frame 1.

In the concrete pillar material A of this embodiment, each concrete frame body 1 is faced to the side of the steel material B which is erected in advance so as to surround the steel material B, and then connected to the loop-shaped portion 5a of the hoop reinforcement. 6 is inserted and configured. The connecting rebar 6 may be a through bar extending up and down the concrete frame 1 or a partial bar corresponding to the loop-shaped portion. In the case of through bars, it can be inserted from above the concrete frame 1, but in the case of partial bars, it can be inserted from the gap 9 formed between the ends of both concrete frames 1.

After the concrete pillar material A is assembled in the above manner, the width stop plate 10 is attached to the bolt 8. The width stop plate 10 extends vertically above and below the concrete pillar A, and has a handle 10a on the outside. The gap 9 is closed by attaching the width stop plate 10. Therefore, concrete 12 is placed in the inner cavity 11 of the concrete pillar material A 1. The poured concrete 12 bites into the expanded metal 3 and is integrated with the concrete pillar material A. By the way, the experimental results have shown that the shear strength and the bond strength of the concrete when the cast concrete is adhered to the concrete pillar material through the expanded metal are more than double that in the case where the expanded metal is not used. The width stop plate 10 is removed after placing concrete. Reference numeral 13 in FIG. 3 is a slab.

In the above, the width stop plate 10 does not necessarily have to extend vertically. For example, in the case of an earthquake-resistant wall structure, the column and the wall are integrally formed, so that the gap 9 can be closed by the wall end. Therefore, the width stop plate does not have to function as a frame for pouring concrete, so it is sufficient to fix it at each important point as shown in FIG. In this case, the width stop plate does not require the handle 10a.

Next, FIGS. 4 and 5 show a second embodiment (corresponding to claim 1) of the present invention. The concrete frame 1 in this embodiment is similar to the above-mentioned embodiment in that the expanded metal 3 is attached to the inner side surface and the hoop reinforcement 5 is provided on the inner side thereof, but the main reinforcement is not provided. First, the hoop muscles are fixed to the reinforcing muscles 14. Moreover, no gap is formed between the concrete frames 1 and 1 facing each other. The other structure is similar to that of the first embodiment.

In this embodiment, after the main bar 4 is constructed on site, the concrete pillar material A is assembled. Here, since there is no gap between the ends of both concrete frames 1 and 1, the width stop plate 10 may be attached at each important point. Further, the hoop reinforcement 15 can be bound and fixed to the main reinforcement 4 to be constructed in the field, and in that case, the hoop reinforcement 5 embedded in the concrete frame 1 becomes a reinforcement.

In each of the above-described embodiments, the two concrete frame bodies 1 have the same shape and are connected at the central portion of the side surface, but the connecting portion may not be the central portion. Further, the concrete frame 1 may have a cross-sectional shape such that one side is open, and if the cross-sectional shape of the column is circular, the concrete frame 1 may have a semi-circular cross-section. The cross-sectional shape of is a pillar shape. Further, in each of the above-described embodiments, the column members are configured by using two sets of concrete frame bodies, but the concrete frame body 1 may be configured to have an L-shaped cross section, and the column members may be configured by four sets. Such a structure in which a large number of frames are combined has the advantages that the frame can be made lighter in weight, the work can be facilitated, and space can be saved during storage.

In each of the above embodiments, the ends of the hoop reinforcement 5 are formed in a loop shape, and the connecting rebar 6 is inserted through the loop-shaped portion 5a to connect the two concrete frames 1 and 1. It is simple and there is no fear that the connection will be loosened even if an outward force is applied during concrete pouring. In the above embodiment, the loop-shaped portion 5a is oriented horizontally and the connecting reinforcing bar 6 is inserted vertically. However, the loop-shaped portion 5a may be oriented vertically and the connecting reinforcing bar 6 is inserted laterally. . Further, the connecting structure is not limited to the combination of the loop-shaped portion and the connecting rebar. For example, a sleeve or other mechanical joint may be attached to the end of the hoop muscle 5 or the hoop muscles may be welded to each other for connection.

In each of the above-mentioned embodiments, since expanded metal is used as the lath attached to the inside of the concrete frame 1, this expanded metal can be used as an inner mold at the time of manufacturing the concrete frame. The same applies when punching metal is used as the lath. Further, for the purpose of obtaining the adhesion strength with the poured concrete, other than the above, re-brass, keystone plate, wire lath, etc. can be used, and any of them is included in the technical scope of the present invention.

[0015]

[Effect of device]

 According to this invention, the concrete column material is constructed by combining the concrete frame bodies having one side opened, so that the concrete frame material is constructed by facing the concrete frame body to the side of the pre-installed reinforcing bar or steel material. Since it is not necessary to install it from above the rebar like the conventional box-shaped column, it is extremely easy to install. In addition, since one side is open, it can be stored in combination alternately, and it requires less storage space than the box type. Further, according to the invention of claim 2, since the main reinforcement is pre-arranged in the concrete frame, the arrangement of the main reinforcement is completed only by the construction of the concrete pillar material of the present invention, and the site work is reduced. The construction period is shortened. Further, in the present invention, the presence of laths prevents the occurrence of cracks in advance, and the durability is improved as compared with the columns of the conventional formwork method.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of a working state of a first embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is also an enlarged cross-sectional view of the end portion.

FIG. 4 is a partially enlarged sectional view of the second embodiment of the invention.

FIG. 5 is a side view of the same.

FIG. 6 is an enlarged cross-sectional view of a conventional example.

[Explanation of symbols]

 1 Concrete Frame 3 Expanded Metal 4 Main Bar 5 Hoop Bar 6 Connecting Bar 10 Width Stop Plate 12 Placing Concrete 14 Reinforcing Bar 15 Hoop Bar A Concrete Column B Steel

Claims (4)

[Scope of utility model registration request] 1. A set of concrete frames whose one side is opened are connected to each other with the opening inside, and the concrete frame has a lath attached inside and a hoop streak is arranged outside the lath. And the ends of the hoop bars of the pair of concrete frame members are connected to each other. 2. The concrete pillar material according to claim 1, wherein a main bar is arranged inside the hoop bar at a corner of the concrete frame. 3. A concrete pillar material according to claim 3, wherein a sleeve for connection is fixed to an end portion of the main bar. 4. The concrete pillar material according to claim 1, wherein the end portion of the hoop reinforcement is formed in a loop shape.