JP2021063370A - Connector for concrete member - Google Patents

Abstract

To provide a connector for a concrete member improved in lateral buckling resistance.SOLUTION: A connector 1 for a concrete member comprises: a connector body 2 having a connector end face 21 formed on a front end face thereof; and an anchor member 3 secured on the connector body 2 and extending rearward. The connector body 2 comprises two plate parts 23, 24 configured to be secured to each other in a state both of their width direction are oriented in a longitudinal direction. A bolt through-hole 22 is formed between both plate parts 23, 24 of the connector body 2, which extends in the longitudinal direction and whose front and rear ends open in front and rear end faces of the connector body 2. Reinforcement ribs 25, 26 projected in an opposite direction of each of the other plate parts 24, 23 are arranged over an entire length on front and rear side end parts of a face facing an opposite side of the other plate parts 24, 23 in each of the plate parts 23, 24.SELECTED DRAWING: Figure 2

Description

The present invention relates to a connecting tool for a concrete member, which is embedded in two concrete members and used for connecting or attracting both concrete members or connecting both concrete members.

Within the scope of this specification and claims, when the connecting tool for a concrete member is embedded in the concrete member, the side that comes to the connecting surface side of the concrete member (lower side in FIG. 3) comes to the front and the inside of the concrete member comes to the inside. The side (upper side in FIG. 3) is referred to as the rear.

This type of connecting tool for concrete members includes a connecting tool body having a connecting end face formed on the front end surface and an anchor member fixed to the connecting tool body and extending rearward, and extends in the front-rear direction to the connecting tool body. At the same time, both front and rear ends are formed with bolt insertion holes opened on both front and rear surfaces of the connector body, and the connector body is formed by bending a flat plate to form two plates in the width direction in the front-rear direction. It is formed by connecting both ends in the longitudinal direction to each other in a state facing toward, and the front side surfaces of both plates serve as the front end faces of the connecting tool body and the connecting end faces are formed on the entire front end face of the connecting tool body. It is known that a bolt insertion hole is formed between both plates, and anchor members are welded to both ends of both plates of the connector body in the longitudinal direction (see Patent Document 1).

In connecting, pulling, or joining two concrete members using the connecting tool described in Patent Document 1, the connecting tool is embedded in the concrete member so that the connecting end face of the connecting tool body is exposed to the connecting surface of the concrete member. By using the work space formed inside the concrete member rather than the connecting tool body of each concrete member, the nut is screwed into the connecting bolt passed through the bolt insertion hole of the connecting tool body of both connecting tools. Will be done.

Japanese Patent No. 5638018

However, in the case of the connector described in Patent Document 1, a load is applied in the strong axis direction of the connector body, and there is a possibility that the connector may protrude in the weak axis direction and cause lateral buckling.

An object of the present invention is to solve the above problems and to provide a connecting tool for a concrete member having improved lateral buckling resistance.

The present invention comprises the following aspects in order to achieve the above object.

1) It consists of a connecting end face having a connecting end face formed on the front end surface and an anchor member fixed to the connecting body and extending rearward. In a concrete member connector used in a state where bolt insertion holes are formed on both front and rear end surfaces and are embedded in the concrete member so that the connecting end surface of the connecting tool body is exposed on the connecting surface of the concrete member.
The connector body consists of two plate parts that are fixed to each other with the width direction facing the front-back direction, and bolt insertion holes are formed between both plate parts of the connector body, and the other in each plate part. A connecting tool for concrete members in which reinforcing ribs projecting to the opposite side of the other plate portion are integrally provided over the entire length on the front and rear side edges of the surface facing the opposite side of the plate portion.

2) For the concrete member according to 1) above, the front side surface of both plate portions and the front side surface of the front reinforcing rib are the front end faces of the connecting tool main body, and the connecting end face is formed at least a part of the front end face of the connecting tool main body. Connector.

3) Each plate portion of the connector body is provided between two flat plate-shaped portions provided at intervals in the longitudinal direction and a bent plate-shaped portion provided between the two flat plate-shaped portions and forming a half portion of the bolt insertion hole. The connecting tool for concrete members according to 1) or 2) above, which is provided with a portion and the flat plate-shaped portions of both plate portions are in a laminated state.

4) The connecting tool main body is formed by joining two plate-shaped bodies that are separately formed and become each plate portion to each other, and each plate-shaped body has both front and rear reinforcing ribs, both flat plate-shaped portions and It has a bent plate-shaped portion, a through hole is formed in one flat plate-shaped portion of each plate-shaped body, and a protrusion is formed in the other flat plate-shaped portion, and the other plate-shaped body is formed in the through hole of each plate-shaped body. The connecting tool for concrete members according to 3) above, in which both plate-like bodies are joined in a state where the protrusions of the above are fitted and the flat plates are laminated.

5) The two plate-like bodies that form both plates of the connector body have the same shape, and are rotationally symmetric twice with the center line extending in the front-rear direction of the bolt insertion hole as the axis of symmetry when viewed from the front. 4) The connecting tool for concrete members described.

When connecting or pulling concrete members together using the concrete member connecting tools 1) to 5) above, or connecting concrete members to each other, the connecting end face of the connecting tool body should be attached to the concrete member connecting tool. It is buried in the concrete member so as to be exposed on the connecting surface of each concrete member, and the work space formed on the rear side of the connecting tool main body of each concrete member is used to insert the bolt of the connecting tool main body of both connecting tools. This is done by screwing a nut into the connecting bolt that has been passed through the hole and applying a force that attracts each other to both connecting tools. Then, according to the connecting tools for concrete members 1) to 5) above, the connecting tool main body is composed of two plate portions fixed to each other with the width direction facing the front-rear direction, and the connecting tool main body is formed. Bolt insertion holes are formed between both plates, and reinforcements that project to the opposite side of the other plate on the front and rear edges of each plate facing the opposite side of the other plate. Since the ribs are integrally provided over the entire length, even if a load is applied in the strong axial direction of the connector body, the reinforcing ribs work to resist lateral buckling that protrudes in the weak axial direction of the connector body. The cross section is greatly increased, and as a result, the lateral buckling resistance is improved.

According to the connecting tool for concrete members in 4) above, when two plate-shaped bodies are joined to form a connecting tool body, both plate-shaped bodies can be easily and surely positioned, and as a result, the connecting tool can be positioned. The work of manufacturing the connecting tool for concrete members including the main body becomes easy.

According to the connecting tool for concrete members in 5) above, the connecting tool body can be made of one type of plate-like body, so that the number of parts can be reduced.

It is a horizontal sectional view which shows the use state of the connecting tool for a concrete member by this invention. It is a front view of the connecting tool for a concrete member by this invention. It is a top view of the connecting tool for a concrete member of FIG. FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG. It is a front view of the plate-like body constituting the connecting tool for a concrete member of FIG. It is a plan view of the plate-like body of FIG. FIG. 5 is a cross-sectional view taken along the line BB of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the following description, the left and right sides of FIGS. 2 to 5 are referred to as left and right.

FIG. 1 shows the usage state of the concrete member connector according to the present invention, FIGS. 2 and 3 show the overall configuration of the concrete member connector according to the present invention, and FIG. 4 shows a partial configuration thereof. Further, FIGS. 5 to 7 show a plate-shaped body constituting the connecting tool main body of the connecting tool for a concrete member according to the present invention.

As shown in FIG. 1, the connecting end face (21) is formed on the front end face of the concrete member connecting tool (1) used for connecting, pulling, or joining two concrete members (100) to each other. It consists of a connector body (2) and an anchor member (3) that is fixed to the connector body (2) and extends rearward, and extends in the front-rear direction to the connector body (2) and both front and rear ends are the connector body (2). Bolt insertion holes (22) opened on both front and rear surfaces of the concrete are formed. The connecting tool main body (2) is embedded in the concrete member (100) so that the connecting end face (21) is exposed on the connecting surface (101) of the concrete member (100), and the connecting tool main body (100) in each concrete member (100). Using the work space (102) formed on the rear side of (2), the connecting bolt (103) passed through the bolt insertion hole (22) of the connecting tool body (2) of both connecting tools (1). By screwing a nut (104) into the concrete member (104) and applying a force that attracts the two concrete members (1) to each other, it is used for connecting, attracting, or joining the two concrete members (100) to each other.

As shown in FIGS. 2 to 4, the connecting tool main body (2) of the concrete member connecting tool (1) has two plate portions (23) fixed to each other with the width direction facing the front-rear direction. ) (24), a bolt insertion hole (22) is formed between both plate portions (23) (24), and the other plate portions (24) (23) in each plate portion (23) (24) Reinforcing ribs (25) (26) protruding to the opposite side of the other plate parts (24) (23) are integrally provided on both front and rear edges of the surface facing the opposite side over the entire length. is there. In addition, the other plate portion (24) (23) side is located in the middle portion in the front-rear direction of the surface of each plate portion (23) (24) facing the opposite side to the other plate portion (24) (23). Two ridges (27) and (28) protruding to the opposite side are integrally provided over the entire length. One ridge (27) is located between the front edge of the plate (23) (24) and the center in the anteroposterior direction, while the other ridge (28) is behind the plate (23) (24). It is located between the side edge and the center in the anteroposterior direction. Further, the distance between the front side edge of the plate portions (23) and (24) and the front side ridge (27) is larger than the distance between the rear side edge and the rear side ridge (28) of the plate portions (23) and (24). It's getting shorter.

Each plate portion (23) (24) of the connector main body (2) has two flat plate-shaped portions (231) (232) (241) (242) provided at intervals in the left-right direction and both flat plate-shaped portions. Bent plate-shaped portions (233) (243) provided between the portions (231) (232) (241) (242) and forming a half portion of the bolt insertion hole (22), and both flat plate-shaped portions (231) ( 232) (241) (242) Protruding portions (234) (235) (244) (234) provided at the lateral outer ends of (242) and projecting diagonally outward in the same direction as the bent plate-shaped portions (233) (243). 245) and. Reinforcing ribs (25) (26) and ridges (27) (28) are integrally provided over the entire length in the left-right direction from one protrusion (234) (244) to the other protrusion (235) (245). ing. Then, the front side surfaces of both plate portions (23) (24) and the front side surfaces of the front side reinforcing ribs (25) (26) become the front end surfaces of the connector body (2), and the rear surfaces of both plate portions (23) (24). The side surface and the rear side surface of the rear side reinforcing ribs (25) and (26) are the rear end surfaces of the connector (1). A connecting end face (21) is formed on at least a part of the front end face of the connecting tool main body (2). The connecting end face (21) may be formed on the entire front end face of the connecting tool main body (2), but is not limited thereto. For example, a chain line (upper edge in FIG. 2) from the inner edge (upper edge in FIG. 2) on the front end of one plate (23) (lower plate (23) in FIG. 2) of the entire front end surface of the connector body (2). Dashed line from the inner edge (lower edge of FIG. 2) on the front end surface of the strip having a constant width up to L) and the other plate (24) (upper plate (24) of FIG. 2). It is sufficient that the connecting end face is formed only in the strip-shaped portion having a constant width in the range up to (L).

The connector body (2) is formed by joining two plate-like bodies (29) which are formed separately and have the same shape and which are the plate portions (23) and (24) to each other. Both front and rear reinforcing ribs (25) (26), double protrusions (27) (28), both flat plates (231) (232) (241) (242), bent on each plate-shaped body (29) Plate-shaped portions (233) (243) and protruding portions (234) (235) (244) (245) are provided. The two plate-shaped bodies (29) that form both plate portions (23) and (24) of the connector body (2) have the same shape, and as shown in FIG. 2, the bolt insertion holes (22) are viewed from the front. It is rotationally symmetric twice with the center line (O) extending in the anteroposterior direction as the axis of symmetry. Through holes (291) are formed in one flat plate-shaped portion (231) (241) of each plate-shaped body (29), and protrusions (292) are formed in the other flat plate-shaped portions (232) (242). There is. Then, the protrusion (292) of the other plate-shaped body (29) is fitted into the through hole (291) of each plate-shaped body (29), and the flat plate-shaped portions (231) (242) and (232) (241). Both plate-like bodies (29) are joined in a state where they are laminated. That is, both plate-like bodies (29) are joined by a weld metal (4) formed between the peripheral edge of the protrusion (292) and the inner peripheral surface of the through hole (291) (see FIG. 4). Each plate-shaped body (29) is made by hot forging a steel material made of, for example, JIS SS400.

The anchor member (3) is made of a reinforcing bar whose longitudinal direction is oriented in the front-rear direction, and the front end portion is a protrusion (234) (235) of both plate portions (23) (24) at both ends in the longitudinal direction of the connector main body (2). ) (244) (245) are placed between each other and welded to the connector body (2). The weld metal (5) formed during the welding also contributes to the joining of both plate-like bodies (29).

As described above, by screwing the nut (104) into the connecting bolt (103) and applying a pulling force to both connecting tools (1), the two concrete members (100) are connected, pulled, or spliced together. When the above is performed, the load is applied in the strong axial direction of the connector main body (2), but due to the action of the reinforcing ribs (25) and (26), the lateral buckling that protrudes in the weak axial direction of the connector main body (2). The cross section that resists is greatly increased, and as a result, the lateral buckling resistance is improved.

In the above-described embodiment, the connecting tool main body (2) has two plate-shaped bodies (29) that are formed separately and have the same shape, and are the plate portions (23) and (24), respectively. Although it is configured by joining, the coupling tool main body may be one in which two plate portions (23) and (24) are integrally formed.

The connecting tool (1) for a concrete member according to the present invention is embedded in two concrete members (100) and is suitably used for connecting, pulling, or joining the two concrete members (100) to each other.

(1): Connecting tool for concrete members
(2): Connector body
(21): Connecting end face
(22): Bolt insertion hole
(23) (24): Plate part
(231) (232) (241) (242): Flat plate
(233) (243): Bent plate-shaped part
(25) (26): Reinforcing rib
(29): Plate-shaped body
(291): Through hole
(292): Protrusion
(3): Anchor member
(100): Concrete member
(101): Connecting surface

Within the scope of this specification and claims, when the connecting tool for a concrete member is embedded in the concrete member, the side that comes to the connecting surface side of the concrete member (lower side of FIG. 3) comes to the front and the inside of the concrete member. The side (upper side in FIG. 3) is referred to as the rear.

Each plate portion (23) (24) of the connector main body (2) has two flat plate-shaped portions (231) (232) (241) (242) provided at intervals in the left-right direction and both flat plate-shaped portions. Bent plate-shaped portions (233) (243) provided between the portions (231) (232) (241) (242) and forming a half portion of the bolt insertion hole (22), and both flat plate-shaped portions (231) ( 232) (241) (242) Protruding portions (234) (235) (244) (234) provided at the lateral outer ends of (242) and projecting diagonally outward in the same direction as the bent plate-shaped portions (233) (243). 245) and. Reinforcing ribs (25) (26) and ridges (27) (28) are integrally provided over the entire length in the left-right direction from one protrusion (234) (244) to the other protrusion (235) (245). ing. Then, it is the front end surfaces of both the plate portion (23) front face is connector body front side and the front reinforcing rib (25) (24) (2), both plates (23) side and after after (24) The rear side surface of the side reinforcing rib (26) is the rear end surface of the connector (1). A connecting end face (21) is formed on at least a part of the front end face of the connecting tool main body (2). The connecting end face (21) may be formed on the entire front end face of the connecting tool main body (2), but is not limited thereto. For example, a chain line (upper edge in FIG. 2) from the inner edge (upper edge in FIG. 2) on the front end of one plate (23) (lower plate (23) in FIG. 2) of the entire front end surface of the connector body (2). Dashed line from the inner edge (lower edge of FIG. 2) on the front end surface of the strip having a constant width up to L) and the other plate (24) (upper plate (24) of FIG. 2). It is sufficient that the connecting end face is formed only in the strip-shaped portion having a constant width in the range up to (L).

Claims (5)

It consists of a connecting end face having a connecting end face formed on the front end surface and an anchor member fixed to the connecting body and extending rearward. The front and rear ends of the connecting body extend in the front-rear direction and both front and rear ends of the connecting body. In a concrete member connector used in a state where a bolt insertion hole opened in the surface is formed and the connecting end surface of the connector body is embedded in the concrete member so as to be exposed on the connecting surface of the concrete member.
The connector body consists of two plate parts that are fixed to each other with the width direction facing the front-back direction, and bolt insertion holes are formed between both plate parts of the connector body, and the other in each plate part. A connecting tool for concrete members in which reinforcing ribs projecting to the opposite side of the other plate portion are integrally provided over the entire length on the front and rear side edges of the surface facing the opposite side of the plate portion. The connecting tool for a concrete member according to claim 1, wherein the front side surface of both plate portions and the front side surface of the front reinforcing rib serve as the front end surface of the connecting tool main body, and the connecting end face is formed on at least a part of the front end surface of the connecting tool main body. .. Each plate portion of the connector body is provided with two flat plate-shaped portions provided at intervals in the longitudinal direction, and a bent plate-shaped portion provided between the two flat plate-shaped portions and forming a half portion of the bolt insertion hole. The connecting tool for a concrete member according to claim 1 or 2, wherein the flat plate-shaped portions of both plate portions are in a laminated state. The connecting tool main body is formed by joining two plate-shaped bodies that are separately formed and are each plate portion to each other, and each plate-shaped body has both front and rear reinforcing ribs, both flat plate-shaped portions, and a bent plate. It has a shaped portion, a through hole is formed in one flat plate-shaped portion of each plate-shaped body, a protrusion is formed in the other flat plate-shaped portion, and a protrusion of the other plate-shaped body is formed in the through hole of each plate-shaped body. The connecting tool for a concrete member according to claim 3, wherein both plate-like bodies are joined in a state in which flat plates are laminated with each other. Claim 4 in which the two plate-like bodies that form both plate portions of the connector body have the same shape and are rotationally symmetric twice with the center line extending in the front-rear direction of the bolt insertion hole as the axis of symmetry when viewed from the front. The connecting tool for concrete members described.

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