JP3073484U - Connecting device for concrete members - Google Patents

Abstract

(57) Abstract: A connecting device for a concrete member capable of locking and fixing a bolt-shaped locking member without performing a work of screwing the female member into each of the concrete member connecting operations. SOLUTION: A substantially cylindrical receiving member embedded in a side surface of a connection end of a concrete member to be connected, and an opening squeezing device attached to an opening side of the receiving member and squeezing a circular opening portion. A member, a bolt-shaped locking member inserted into the receiving member and fixed at the opening narrowing portion except for a projection exposed to the outside, and a connection bridged between the projections of the locking member. A connection member for connecting a concrete member having a plate, wherein the opening narrowing portion has a cylindrical fitting portion fitted to an outer peripheral surface of an opening end of the receiving member, and an opening center from the fitting portion end. A locking piece that projects in the direction of a loop, wherein the locking member is formed such that the diameter of the base end side of the tapered male screw portion is larger than the circular opening of the opening narrowing portion. The locking piece of the opening narrowing portion bites into the thread valley of the proximal-side male screw portion and is locked. It is characterized by having done.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a concrete member connecting device for connecting, for example, adjacent heavy and large concrete members substantially in parallel.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, in a connection operation for connecting a heavy and large concrete product, female screw holes are formed on both side surfaces of a concrete member to be connected, and bolts are screwed into the female screw holes, respectively. A connection plate was attached to connect them. However, conventionally, the work of screwing a bolt into the female screw hole takes a long time, and the work of screwing each of a large number of concrete members has taken an enormous amount of time.

[0003]

[Problems to be solved by the invention]

 Accordingly, the present invention has been made in order to solve the above-mentioned conventional problems, and is a concrete member capable of locking and fixing a bolt-shaped locking member without performing a work of screwing into each female screw hole for connecting a concrete member. The purpose of the present invention is to provide a connection device of the above.

[Means for Solving the Problems]

 The connecting device for a concrete member according to the present invention includes a substantially cylindrical receiving member embedded in a side surface of a connecting end of a concrete member to be connected, and a circular opening attached to the opening side of the receiving member. An opening squeezing member to be squeezed; a bolt-shaped locking member inserted into the receiving member and fixed by the opening squeezing portion leaving a projection exposed to the outside; and a protrusion of the locking member A connection device for a concrete member having a connection plate erected between the portions, wherein the opening narrowing portion is fitted to a cylindrical fitting portion fitted to an outer peripheral surface of an opening end of the receiving member. A locking piece projecting from the end of the attachment portion toward the center of the opening, wherein the locking member has a diameter at the base end side of the tapered external thread portion of the opening narrowing portion. Formed with a diameter larger than that of the opening The locking piece of the opening narrowing portion bites into and locks.

[Embodiment of the invention]

 Hereinafter, an embodiment of a concrete member connecting device according to the present invention will be described with reference to the drawings.

[0004] Receiving members 2 each having a substantially cylindrical shape are embedded on both sides near the connection end surface of the concrete member 1 to be connected.

[0005] The receiving member 2 may be generally formed of a metal pipe. The receiving member 2 made of a metal pipe is buried in a mold for molding a concrete member in advance, and in that state concrete is poured into the mold and solidified. It is installed and fixed in the member 1.

An opening squeezing member 4 for squeezing the size of a circular opening into a small circle is attached to the opening 3 of the receiving member 2.

The opening squeezing member 4 has a cylindrical fitting portion 5 fitted on the outer peripheral surface of the opening end of the receiving member 2, and an end of the fitting portion 5 formed continuously with the fitting portion 5. And a locking piece 6 in the form of a loop projecting from the portion toward the center of the opening.

Here, the material of the opening narrowing member 4 is not limited at all, but is formed of a flexible member such as a plastic member or a reinforced plastic member.

Reference numeral 7 denotes a bolt-shaped locking member. The locking member 7 is generally used by processing a metal bolt, and the male screw portion 8 is formed to taper from the distal end toward the proximal end to have a smaller diameter. The proximal end of the male thread 8 is formed to have a diameter larger than that of the receiving member 2, so that when the locking member 7 is inserted into the opening of the receiving member 2, the proximal end of the male thread 8 opens. The projecting portion 9 that is exposed to the outside and protrudes without entering the inside is formed.

Reference numeral 10 denotes a connecting plate usually formed of a metal member, and through holes 11, 11 through which the locking member 7 penetrates are formed at both ends thereof.

In order to manufacture a concrete member 1 having the receiving member 2 embedded therein, ie, as shown in FIG. 3 or FIG. 4, the receiving members 2 are provided on both sides of the connection end face as shown in FIG. It is buried with one of its openings exposed, and is fixed in the concrete member 1.

[0012] Then, in order to manufacture the concrete member 1, a mold is molded, and concrete is poured into the mold.

At this time, the receiving member 2 is attached to the outer formwork side in advance, and when the concrete is solidified, the receiving member 2 is embedded and fixed in the concrete.

In order to connect the concrete members 1 thus manufactured, their connection end faces are brought into contact with each other. Then, the bolt-shaped locking member 7 is inserted into the receiving members 2 and 2 near the connection end face.

Then, the bolt-shaped locking member 7 is smoothly inserted into the receiving member 2 because the male screw portion 8 is tapered from the base end side to the front end side. Is inserted about two times, the locking piece 6 of the opening narrowing member 4 fits into the thread groove 12 of the male screw portion 8, and the locking member 7 has a protrusion 9 that protrudes to the outside. It is fixed to the member 2.

A connecting plate 10 is arranged so as to straddle between the protruding portions 9 of the locking member 7, so that the concrete members 1 and 1 can be easily connected.

The protrusions 9 of the locking member 7 inserted into the four corners on both ends of the concrete member 1 can also be used as hooks for lifting.

Further, if the receiving member 2 is buried in the position of the center of gravity of the side wall of the concrete member, and the locking member 7 is inserted into the receiving member 2, the receiving member 2 can be used as a locking member for lifting inversion.

When it is desired to remove the locking member 7 from the receiving member 2, the locking member 7 can be removed by rotating the locking member 7 counterclockwise, and the locking member 7 can be easily removed.

[Effect of the invention]

 Thus, the present invention has the above configuration.

With the concrete member connecting device according to the present invention, the bolt-shaped locking member can be reliably and quickly locked and fixed without performing the work of screwing the female member into each of the concrete member connecting operations. With the excellent effect.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory diagram (part 1) illustrating the configuration of the present invention.

FIG. 2 is a configuration explanatory diagram (part 2) illustrating the configuration of the present invention.

FIG. 3 is a use state explanatory view (part 1) illustrating the use state of the present invention.

FIG. 4 is a use state explanatory view (part 2) illustrating the use state of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete member 2 Receiving member 3 Opening part 4 Opening narrowing part 5 Fitting part 6 Locking piece 8 Locking member 9 Projection part 10 Connection plate 11 Through hole 12 Thread root

Claims (1)

[Utility model registration claims] 1. A substantially cylindrical receiving member embedded in a side surface of a connection end of a concrete member to be connected, and attached to an opening side of the receiving member, wherein a diameter of a circular opening of the receiving member is reduced. An aperture squeezing member that squeezes into the receiving member; a bolt-shaped locking member that is inserted into the receiving member and is locked and fixed by the opening squeezing portion except for a projection that is exposed to the outside; And a connecting plate provided between the projecting portions of the concrete member, wherein the opening narrowing portion is a cylindrical fitting portion fitted to an outer peripheral surface of an opening end of the receiving member. And a loop-shaped locking piece projecting from the end of the fitting portion toward the center of the opening, wherein the locking member has a tapered male screw portion whose base end side has a diameter at the opening narrowing portion. Formed with a larger diameter than the circular opening of Connection device of the concrete member, characterized in that the locking piece is engaged bite of.