JP3364479B2 - Member connection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pair of connecting nuts that are respectively screwed into threaded portions formed at opposite ends of a pair of connected members to be connected, and at least by engaging these connecting nuts. Regarding a member connecting device provided with a detachable connecting metal fitting for rotating one connecting nut, particularly compact and withstanding high tension, all connected members can be integrated quickly and easily on site, and This structure is suitable for applying a predetermined force or pre-stress to the members to be connected, as a structure that facilitates adjustment of the connecting work with respect to deviations due to angles generated at the opposite ends.

[0002]

2. Description of the Related Art Generally, it is very difficult to make a pair of members to be connected, which are buried in a concrete member or the like, and make contact with each other on the spot, and to connect the members in the contact state. Therefore, the inventor of the present invention provides a member connecting device of inexpensive and simple structure that can perform these connecting operations quickly and easily and accurately, but in addition to various site situations, for example, When the connected member is an annular member such as a tunnel,
Alternatively, when located in a plane curved section, it is necessary to connect on the tangential line of the circumference, and the tangent angle is generated in the screw part between the connected members facing each other due to the shape of the circular arc, which hinders the rotation of the connecting fitting of the member connecting device. It also causes damage to the threads due to rubbing. Further, the vertical component force due to the tangent angle causes shear strain at the exposed contact at the working opening of the connected member of the prefabricated concrete member. Further, when the thickness of the prefabricated concrete member becomes thicker, the working opening becomes deeper and narrower, which makes it very difficult to perform the connecting work such as the rotational tightening of the tool. Furthermore, it is required to apply a predetermined prestress accurately by easy and quick connection work, and it is possible to provide a compact and slim member connection device that can withstand high tension, and further, screw The combined use of the right and left screws of the member is apt to make a mistake and misunderstanding of the screw cutting direction during on-site work, and it is currently required to improve them.

[0003]

Therefore, according to the present invention, a preset prestress is easily and quickly applied to the connected members to be connected, and the connected members to be connected may have their axial centers slightly displaced. It is an object of the present invention to provide a member connecting device having a structure capable of appropriately performing a normal connecting work.

[0004]

SUMMARY OF THE INVENTION A member connecting device according to the present invention includes a pair of connecting nuts that are respectively screwed into threaded portions formed at opposite ends of a pair of members to be connected. A connecting metal fitting that engages with the connecting nut and rotates at least one of the connecting nuts, and a wing that engages with the connecting metal and rotates in conjunction therewith is projected from at least one of the connecting nuts. An engaging portion with the wing is formed on the connecting metal fitting, a spherical body concave portion is formed on a back surface of the pair of connecting nuts facing each other, and a spherical body convex portion engaging with the spherical body concave portion is formed on the connecting metal fitting. Formed into
Further, it is characterized in that an engaging portion of the tightening tool and a conical escape groove for adjusting an angle of the facing end portion of the connected member are formed in the connecting fitting.

[0005]

Therefore, in the member connecting device according to the present invention, the wings of the confronting connecting nuts are guided to the engaging portions of the detachable connecting metal fittings, and then the connecting metal fittings are rotated by using the torque management tool. And the connecting nuts move in a direction away from each other to engage the spherical concave portion of the connecting nut with the opposing spherical convex portion of the connecting fitting, and to engage the spherical concave portion and the spherical convex portion. The conical escape groove between the connected member and the connected member eliminates the influence of the axis deviation and the angle deviation between the connected members, so that both the connecting nut and the connecting fitting can be properly engaged to perform centering. At the same time, the coupling nut is rotated by the engagement of the coupling nut and the coupling fitting to improve the tightening strength, and the torque management tool rotates the coupling fitting until a predetermined prestress is reached. After reaching a predetermined pre-stress, the work opening of the prefabricated concrete member is filled with a filler so as to cover the entire member connecting device, and the member connecting device is fixed. Also, when reassembling is required for some reason during the connecting work, if the connecting metal fitting is rotated in the opposite direction, the connecting nut will also rotate in the same direction and both connecting nuts will move toward each other. It is possible to move and release the engagement between the spherical concave portion and the opposing spherical convex portion to make the connecting fitting disassembleable.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
~ It demonstrates based on the drawing of FIG. FIG. 1 is an exploded perspective view of a member connecting device according to the present invention, in which the connecting nuts 3, 3 and the lock nuts 4, 4 are previously attached to the screw portions 2, 2 formed at the tips of the facing connected members 1, 1. It is screwed. The connecting nuts 3 and 3 are provided with wings 5 and 5, and spherical recesses 6 and 6 are formed on the back surfaces of the connecting nuts 3 and 3 facing each other. The connecting nuts 3 and 3 face each other so as to sandwich them from the left and right sides, and the connecting metal fittings 7,
7 are arranged, and the connecting metal fittings 7, 7 are formed with spherical convex portions 8, 8 on the surfaces facing the spherical concave portions 6, 6 of the connecting nuts 3, 3. Further, the connecting metal fittings 7, 7 are formed with conical escape grooves 9, 9 in the portions for accommodating the screw portions 2, 2 of the members to be connected 1, 1 and engage with the wings 5, 5 of the connecting nuts 3, 3. The openings 10 and 10 to be combined are formed, and the openings 10 and 10 of the connecting fitting are formed.
A polygonal nut-shaped tool engaging protrusion 11 is formed between the two. In addition, 12 is a positioning protrusion of the connecting metal fittings 7, 7, and 13 is a positioning recess.

FIG. 2 shows a precast concrete member 14, 1
4 is a cross-sectional view in which connecting nuts 3 and 3 and lock nuts 4 and 4 are provided in advance on the connected members 1 and 1 facing each other in the working openings 15 and 15 of FIG. In this state, as shown in FIG. 1, the pair of connecting fittings 7, 7 are arranged so as to sandwich the connecting nuts 3, 3 from both sides, and the wings 5, 5 of the connecting nuts 3, 3 are arranged.
5 is engaged with the openings 10, 10 of the connecting fittings 7, 7, and the positioning protrusions 12, 12 of the connecting fittings 7, 7 and the positioning recess 1 are provided.
The pair of connecting metal fittings 7, 7 are attached by 3, 13 in the state of FIG. Then, the rotary tightening tool is attached to the tool engaging protrusion 11
And connecting nuts 3 and 3 are rotated in the direction of the arrow to move the connecting nuts 3 and 3 away from each other.
While adjusting the torque by engaging the spherical projections 8 of the connecting fittings 7 with the spherical recesses 6 of 6 and aligning them with each other, and then using a wrench or a monkey wrench for torque management. The connecting fittings 7, 7 are rotated. Therefore, the connecting fittings 7, 7 are integrated by the effect of the wedge and the chuck due to the engagement between the spherical concave portions 6, 6 of the connecting nuts 3, 3 and the spherical convex portions 8, 8 of the connecting fittings 7, 7.

FIG. 4 shows that the intersections 18 of the axes of the connected members 1, 1 facing each other in the working openings 17, 17 of the annular prefabricated concrete members 16, 16 are formed on both prefabricated concrete members 16, 16. Another embodiment of the joint surface 19 is shown, in which the intersection point 18 of the axes of the members 1, 1 to be connected is shown.
The tangent line at and the axis line have a tangent line angle θ. The inclination of the screw portions 2 and 2 of the connected members 1 and 1 due to this angle θ is due to the conical escape grooves 9 and 9 provided in the connection fittings 7 and 7, the spherical recesses 6 and 6 of the connection nuts 3 and 3, and the connection. This is solved by the spherical projections 8 and 8 of the metal fittings 7 and 7. Further, the cushioning material 20 interposed between the prefabricated concrete members 16 and 16 in which the connected members 1 and 1 are embedded and the connected members 1 and 1 is the connected members 1 and 1 generated by the connection of the connected members 1 and 1. The deformation washer 21 absorbs the shear strain of No. 1 and assists in fastening the lock nuts 4, 4 and the connecting fittings 7, 7. In addition, connecting metal fittings 7, 7
It is possible to use an arc-shaped projection instead of the polygonal nut for the tool engagement projection 11 of FIG. 5, and as shown in FIGS. 5 and 6, a gear-shaped tool engagement tool in which a torque management hook wrench 22 can be used. You may use the compound projection part 23 and the tool engagement projection part 24 of a hook hole shape.

FIG. 7 shows another embodiment in which one of the pair of connecting nuts is not provided with a wing. The connecting nut 25 without a wing is fixed to the screw portion 2 by spot welding 26 or the like, and the wing 5 is provided. Connect the connection nut 3 to the connection fittings 7,7
Turn to tighten. The screws and nuts of the threaded portions 2 and 2 of the connected members 1 and 1 facing each other in this manner are all commercially available standard thread types, and are economical and have no annoyances or mistakes in work. There is a great advantage of not having it.

[0010]

As is apparent from the above description, according to the structure of the present invention, the normal connecting work can be appropriately performed even if the axes of the members to be connected are angularly displaced. ,
Pre-stress can be easily and quickly applied to the connected members to be connected by using a torque management tool, etc., and the connecting work of the connected members can be performed more accurately and without using a complicated structure. The pre-stress can be applied quickly while controlling the tightening strength by the abutting engagement of both the connecting metal fitting and the connecting nut, which is suitable for earthquake resistance and ground subsidence measures, and civil engineering, construction, bridges, etc. have been divided. Can be widely used as an integrated structure that connects members, cables,
It is possible to provide a member connecting device as a mechanical fastening device such as a brace or a tie rod.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a member connecting device according to the present invention.

FIG. 2 is a cross-sectional view in which a connecting nut and a lock nut are provided in advance on the members to be connected facing each other in the working opening of the prefabricated concrete member.

FIG. 3 is a perspective view in which a pair of connecting fittings are attached by a positioning protrusion and a positioning recess of the connecting fitting of the member connecting device according to the present invention.

FIG. 4 is a cross-sectional view of the member connecting device according to the present invention showing another embodiment in which the intersection of the axes of the members to be connected facing each other in the working opening of the prefabricated concrete member is on the joint surface of both the precast concrete members. .

FIG. 5 is a cross-sectional view of essential parts showing a gear-shaped tool-engaging projection portion that allows the use of a torque management hook spanner.

FIG. 6 is a cross-sectional view of essential parts showing a tool engaging protrusion having a hooking hole shape in which a torque management hooking wrench can be used.

FIG. 7 is an exploded perspective view of a member connecting device according to another embodiment of the present invention.

[Explanation of symbols]

1 Connected member 2 screw part 3 Connection nut 4 lock nuts 5 wings 6 spherical recess 7 Connecting bracket 8 spherical projection 9 escape groove 10 openings 11 Tool engagement protrusion 12 Positioning protrusion 13 Positioning recess 14 Prefabricated concrete members 15 Working openings 16 Prefabricated concrete members 17 Working openings 18 intersections 19 Bonding surface 20 cushioning material 21 Deformed washer 22 Torque management hook spanner 23 Gear-shaped tool engagement protrusion 24 Tool-engaging projections with hook holes 25 connecting nut 26 Spot welding θ tangent angle

Claims (6)

(57) [Claims] 1. A pair of connecting nuts respectively screwed into screw parts formed at opposite ends of a pair of connected members to be connected, and at least one connecting nut engaged with the connecting nuts. Equipped with a detachable connecting bracket to rotate,
A wing that engages with the connecting fitting and rotates in conjunction therewith is projectingly provided on at least one of the connecting nuts, and an engaging portion with the wing is formed in the connecting fitting, and a pair of opposing connecting nuts are provided. A spherical concave portion is formed on the back surface, a spherical convex portion that engages with the spherical concave portion is formed on the connecting fitting, and the engaging fitting of the tightening tool is formed on the connecting fitting.
And a conical escape groove for adjusting the angle of the opposite ends of the member to be connected. 2. The screw threads formed on the opposite ends of the pair of members to be connected have one type of both threads, and a wing is formed on only one of the connecting nuts to form a wing on the other side. The member connecting device according to claim 1, wherein an unattached connecting nut is fixed to the connected member, and the connected member is tightened only by rotating the connecting nut with wings. 3. The cushioning material for absorbing the shear strain of the connected member generated by the connection of the connected members is interposed between the connected member and the prefabricated concrete member in which the connected members are embedded. The member connecting device according to claim 2. 4. The member connecting device according to claim 1, wherein an engaging portion of the tightening tool formed on the connecting fitting has a polygonal protrusion. 5. The member connecting device according to claim 1, wherein the engaging portion of the tightening tool formed on the connecting fitting has a gear-shaped projection. 6. The member connecting device according to claim 1, wherein an engaging portion of the tightening tool formed on the connecting fitting has a hook hole.