JPH1072874A - Clamping construction and clamping device used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide clamping construction and a clamping device excellent in work efficiency and also excellent in clamping strength as well as economical efficiency and capable of clamping two members concretely such as columnar members. SOLUTION: Clamping construction is equipped with flange sections 2a projected inward in the clamping ends of clamped metal fixtures 2, faces 2c on the side separated from contact surfaces 2b of the flange sections 2a are formed in a taper shape getting thin in the inside circumferential end. Then, a recessed section 1A having a U-shaped section for holding two confronted/contacted flange sections 2a is provided to a clamping metal fixture 1 holding two clamped metal fixtures 2 to clamp and, at the same time, the confronted inside of the recessed section 1A having a U-shaped section is formed of the tapered surface corresponding to the taper-shape of the clamped metal fixtures 2. The flange sections 2a of the clamped metal fixtures 2 are brought into contact with and are fitted with a screwing device so as to hold and fix with the recessed section 1A having a U-shaped section of the clamping metal fixture 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The invention according to this application (the invention of the present application) comprises two short pillars between two members, such as a long pillar, for example, a three-storey pillar. Alternatively, a columnar fastening structure useful for fastening three or the like,
It relates to a fastener used for it.

[0002]

2. Description of the Related Art Long pillars, such as pillars of a three-story building, are welded in advance in a factory and transported to the site due to their length. Can not.

[0003] Therefore, in such a case, one long column is welded at the site, or one long column is welded at the factory to the end of the short column at the factory. There is a method to make it a pillar.

[0004] However, in the former case, there is a problem in the reliability and workability of the welded portion by field welding, and in the latter case, there is a problem in strength and the fastening part is thicker than other parts. There is a problem in the workability of the fastening work.

[0005] Specifically, as a prior art in which the above-mentioned fastener is welded to the end of a short pillar at a factory to form one long pillar at the site, a prior art filed by the present inventors ( Japanese Patent Application No. 2-67788). Also in the case of this fastening structure, an inner cylinder integrally fixed to the other pillar is inserted into the end of one pillar in a telescopic manner, and a bolt is screwed into a screw hole previously formed on both. Although it is technically and economically superior to the previous ones, there is still room for improvement in terms of workability. A gap required for insertion is required between the inner walls of one of the pillars, and this gap becomes unnecessary play in the fastening structure and causes a decrease in strength of the fastening portion.
Although it is technically possible to eliminate the above gap as much as possible, such a configuration requires high-precision machining, and is very inexpensive for fastening general structures such as buildings. Can not.

[0006] The present invention has been made in view of such a situation, and two members to be fastened, which are excellent in workability and also in terms of fastening strength and economy, specifically, It is an object of the present invention to provide a fastening structure for fastening between columnar objects and a metal fitting used for the fastening structure. In the present specification, the fastening fitting and the fitting to be fastened are described as “fittings” for convenience, but the material is not limited to metal, but may be made of other materials such as plastic or ceramic. It is used for a wide range of concepts, including things.

[0007]

According to the fastening structure according to the first aspect of the present invention, a metal fitting to be fastened is integrally formed at each of opposing ends between two members to be fastened. A fastening structure in which the two members are clamped and fixed between the two members by the fastening member in a state in which the fastening members are in contact with each other, and the fastening member is attached to a fastening end of the fastening member. In addition to providing a flange protruding inward, the surface of the flange separated from the contact surface is
It is formed in a tapered shape that becomes thinner on the inner peripheral end side, and the fastening fitting is provided with a concave portion having a U-shaped cross section that sandwiches the two flange portions facing and abutting, The inner surface to be formed is formed with a tapered surface corresponding to the tapered shape of the metal fitting to be fastened, and in a state where the flange portion of the metal fitting to be fastened abuts, the flange portion is formed into a U-shaped recess of the metal fitting for fastening. The two members are fastened by screwing means so as to be clamped and fixed.

Thus, according to the fastening structure of the first invention of the present application (the invention of claim 1), if the ends of the two members on which the metal fittings to be fastened are brought into contact, A double-tapered projection is formed in which the tapered surface of the flange portion of each of the two metal fittings faces outward, and the U-shaped concave portion of the metal fitting is generally fitted into the projection. Then, if the metal fitting to be fastened and the metal fitting for fastening are screwed by the screwing means from the substantially fitted state, the metal fitting for fastening is formed on the double tapered projection formed by the flange portion of the metal fitting to be fastened. The fitting of the concave portion is completed, and the flange portions of the two fasteners are clamped and fixed by the fasteners. As a result, the opposed fasteners are firmly fastened by the fasteners, and the two fasteners are fastened. The members can be firmly fastened.

In the fastening structure according to the first aspect of the present invention, the flange is annularly provided around the end face of the metal fitting for fastening in order to increase the strength of the fastening structure. preferable.

[0010] In the fastening structure according to the first aspect of the present invention, as described in claim 3, a plurality of fastening fittings are provided at appropriate intervals on the inner periphery of the fastening fixture.
It is preferable in dispersing stress based on fastening.

Further, in the fastening structure according to the first aspect of the present invention, a female screw hole for the screwing is formed in the fastener, and the female part of the fastener to be fastened is provided. A through hole is formed at the position corresponding to the screw hole,
A bolt can be screwed into the female screw hole from the outside of the metal fitting through a through hole. In this case, since the female screw hole is formed in the metal fitting, the bolt can be used. It can be easily screwed from the outside of the metal fitting to be fastened.

Further, in the fastening structure according to the second invention of the present application (the invention according to claim 5), a metal fitting to be fastened is integrally formed at each longitudinally opposed end between two pillars to be fastened. A fastening structure configured to fasten the two columnar members in the longitudinal direction by the fastening metal in a state where these opposed metal fittings are in contact with each other. An inwardly protruding flange portion is provided at the fastening end of the metal fitting, and a surface of the flange portion that is separated from the contact surface is formed in a tapered shape that becomes thinner on the inner peripheral end side. The metal fitting is provided with a concave portion having a U-shaped cross section for sandwiching the two flange portions facing and abutting, and the opposing inner surface of the U-shaped concave portion is formed with a tapered surface corresponding to the tapered shape of the metal fitting to be fastened. Formed, and In the contacted state, the fastener is fastened by bolts from the outside of the fastener so that the two flange portions that are in contact with each other are clamped and fixed by the U-shaped fastener from the inside. , Whereby two columnar objects are fastened to each other.

According to the fastening structure according to the second aspect of the present invention, if the longitudinal ends of the columnar objects to which the respective fasteners are fixed are brought into contact with each other, these two fasteners can be fastened. A double-tapered projection is formed in which the tapered surface of the flange of the fitting is outward, and the U-shaped recess of the fastening fitting is generally fitted into the projection from inside. Then, when the metal fitting to be fastened and the metal fitting for fastening are screwed by bolts from outside of the metal fitting to be fastened from the generally fitted state, a double tapered projection formed by the flange portion of the metal fitting to be fastened. After the fitting of the recesses of the fastening fittings is completed, the flange portions of the two fastening fittings are clamped by the fastening fittings.
As a result of being fixed, the metal fittings facing each other are firmly fastened by the metal fittings. For this reason, the two columnar objects can be firmly fastened. In addition, in this case, since the fastening fitting is not exposed outside the fastening fixture, the projection can be eliminated from the fastening portion of the columnar object.

In the fastening structure according to the fifth aspect, the columnar object can be a square pipe.

Further, in the fastening structure according to the fifth aspect, as described in the seventh aspect, the fact that the outer circumference of the metal fitting to be fastened is substantially equal to the outer circumference of the square pipe is caused by fastening to the outer circumferential surface of the columnar object. As a result, no projection is generated, which is preferable in forming a structure such as a building.

Further, in the fastening structure according to the fifth aspect, as described in the eighth aspect, the fastening fittings are disposed at the four corners of the fitting to be fastened. This is preferable for dramatically increasing the strength of the fastening portion.

Further, in the fastener according to the third invention of the present application (the invention according to claim 9), a metal fitting to be fastened is integrally fixed to each of opposed ends between two members to be fastened. A fastener used in a fastening structure for fastening between the two members by sandwiching and fixing the two fasteners from both sides in a state where the fasteners are brought into contact with each other. The tool has a flange protruding in a direction (inward or outward) perpendicular to the direction in which it is to be connected to the fastening end, and the surface of the flange separated from the abutting surface is inward. A metal fitting to be fastened in a tapered shape that becomes thinner on the peripheral end side, and a concave portion having a U-shaped cross section that sandwiches the two flange portions facing and abutting each other, and an inner surface facing the U-shaped concave portion Corresponds to the tapered shape of the metal fittings That it is composed of a fastening bracket which is formed with tapered surfaces, and, in the fastening bracket and the object to be fastened bracket, characterized in that the screwing means for screwing them is disposed.

According to the fastener according to the third aspect of the present invention, when the two metal fittings are brought into contact with each other, the tapered surfaces of the flange portions of these two metal fittings become outward. A double-tapered projection is formed, and this projection is generally fitted by the U-shaped recess of the fastening fitting.
Then, if the metal fitting for fastening and the metal fitting for fastening are screwed by the screwing means from this generally fitted state,
The fitting is completed, and the opposed metal fittings to be fastened are firmly fastened by the metal fittings for fastening. Therefore, if the metal fitting to be fastened of this fastener is fixed to the ends of the two members to be fastened, it is possible to easily and firmly fasten the fastener.

In the fastening structure according to the ninth aspect, as in the tenth aspect, a female screw hole is formed in one of the metal fitting to be fastened and the metal fitting for fastening, and a through hole is formed in the other.
A bolt can be screwed from the side of the fastening fitting or the fastening fitting side where the through hole is formed to the fastening fitting or the fastening fitting side where the female screw hole is formed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fastening structure according to an embodiment of the present invention and a metal fastener used for the fastening structure will be specifically described below with reference to the drawings.

FIG. 1 is a plan sectional view of a fastening portion (shown by an arrow II-II 'in FIG. 2) showing the fastening structure according to the first embodiment. FIG. 2 is a sectional view taken along line II of FIG. FIG.

1 and 2, reference numeral 1 denotes a fastening bracket,
Is a metal fitting to be fastened, 3 is a bolt for screwing the metal fitting 1 for fastening and the metal fitting 2 to be fastened, A is one square pipe to be fastened, and B is another square pipe to be fastened.

As shown in FIG. 2, a metal fitting 2 to be fastened is fixed to an end on the fastening side of one square pipe A to be fastened by welding (see a portion denoted by reference numeral "10" in FIG. 2). ing. A fastening member 2 having the same configuration as that of the fastening member 2 is similarly fixed to an end of the other square pipe B to be fastened on the fastening side by welding. The ends of the two square pipes A and B arranged so that the ends in the longitudinal direction face each other are clamped by the respective fastening metal fittings 2 fixed thereto. By being attached and fixed, it is firmly fastened.

By the way, as shown in FIG. 1, the metal fitting 2 to be fastened has a rounded shape having a size (dimension) whose outer circumference matches the outer circumference of the square pipe A or the square pipe B. Square (means square with rounded corners)
As shown in FIG. 2, a flange portion 2a is formed at an end to be fastened, and a surface 2c of the flange portion 2a on the side separated from the contact surface 2b is formed. It is formed in a tapered shape that becomes thinner on the inner peripheral end 2d side. The contact surface 2b is a plane orthogonal to the longitudinal direction of the square pipe A or the square pipe B (the direction in which the pipes are to be connected).

In addition, the fastening fitting 1 is planarly
As shown in FIG. 1, the fastening member 2 is configured as a trapezoidal hexagon having three sides 1 a, 1 b, and 1 c corresponding to the shape of the corners 2 e of the four corners of the metal fitting 2. As shown in FIG. 2, a concave portion 1A is provided at the center in the vertical direction so as to have a U shape (including an inverted U shape). Opposing inner surfaces 1d, 1e of the recess 1A
Is formed by a tapered surface equal to the taper (inclination angle) of the tapered surface 2c of the metal fitting 2 to be fastened. That is, the recess 1A is formed by the flange portion 2a of the metal fitting 2 in a state where the two metal fittings 2 are brought into contact with each other on the contact surfaces 2b (see FIG. 2). The shape and dimensions are such that the tapered projection C is clamped, and therefore the depth dimension of the recess 1A is clamped in the clamped state. (Dimensions), that is, a so-called "foot" is formed.

At the upper and lower ends of the fastening 1, the middle side 1 a of the three sides 1 a, 1 b, and 1 c is planarly viewed.
The female screw hole 1B into which the external thread portion of the bolt 3 is screwed is provided.

In the state where the metal fittings 2 facing each other are fastened by the metal fittings 1 at the four corners in the vertical center of the metal fittings 2 in the vertical direction, A through hole 2A through which the bolt 3 can be inserted is formed at a position corresponding to the hole 1B.

A counterbore 2B for accommodating the head of the bolt 3 is formed continuously with the through hole 2A outside the through hole 2A.

In the case of the present embodiment, the fastening fitting 1 and the fastening fitting 2 are made of a weldable casting (metal) and manufactured by casting.

The fastening fitting 1 and the fastening fitting 2 configured as described above are fixed to the end faces of the square pipes A and B to be fastened by welding, so that the fastening is performed as follows. To contribute.

That is, first, as shown in FIG. 1, a cylindrical shape having a lid 4a for fixing the position is provided on the flange portion 2a of the metal fitting 2 fixed to the end face of one of the square pipes B, as shown in FIG. Is temporarily provided, and with the one side 1f of each fastener 1 abutting against the cylindrical portion 4b of the fastener 4, the fastener 1 is bolted from outside of the fastener 2 to be fastened. Is temporarily fixed to the metal fitting 2 to be fastened. In this state, the fastening fitting 1 is temporarily fixed to the fastening fitting 2 on the square pipe B side.

In this state, the contact surface 2b of the bracket 2 of the square pipe A is brought into contact with the contact surface 2b of the bracket 2 of the square pipe B. Holding the square pipes A and B, as shown in FIG. 2, a bolt 3 is screwed into the female screw hole 1B above the fastening fitting 1 from the outside of the fastening fitting 2 of the square pipe A through the through hole 2A. To wear. When the tip of the bolt 3 is screwed from all the through holes 2A at the four corners of the square pipe A to the female screw hole 1B of the fastening 1
In this state, the metal fittings 2 to be fastened of the square pipes A and B
8 bolts 3 are evenly and gradually tightened.

As described above, by gradually and uniformly tightening the bolts 3, the outer flange formed by the flange portions 2a of both the metal fittings 2 to be abutted on the abutting surfaces 2b of each other. As shown in FIG. 4 or FIG. 3, the U-shaped concave portion 1A of the fastening fitting 1 is fitted to the double-tapered protrusion C (see FIGS. 2 and 4) having a tapered surface. The flange portions 2a of the two opposed fittings 2 are clamped and fixed.

Then, the both-tapered projection C (FIG. 2, FIG. 2)
The fitting of the U-shaped concave portion 1A of the fastening fitting 1 into the fitting 1 shown in FIG.
The fitting is gradually performed by the so-called “wedge action”, and when the fitting shown in FIG. 4 is completed, the fastening is very firmly performed. At this time, in the case of the present embodiment, since the diameter of the lid 4a of the fixing bracket 4 is small, the fitting 4 falls down during the progress of the fitting.

Therefore, if it is not desired to prevent the fixing bracket 4 from dropping, the diameter of the cover 4a is increased so that the peripheral edge of the cover 4a is positioned above the fastening bracket 1 even when the fitting is completed. Must be configured.

In the above embodiment, the square pipe B
Temporary fixing of the fastening fitting 1 was performed using a cylindrical fixing fitting 4 with a lid 4a and a bolt 3, but instead of the fixing fitting 4, a ring-shaped rubber string or rubber band, or It can also be performed by using a coil spring, and in this case, even when the fastening is completed, the lid 4a does not fall down unlike the fixing bracket 4 having a small diameter.

Further, in the above-described embodiment, the fastening fitting 1 is arranged inside the fitting 2 to be fastened. However, when the fastening fitting 1 is used in a fastening place where a projection may be formed outside, ,
The above-described flange portion may be formed outside the metal fitting to be fastened, and the metal fitting 1 may be sandwiched from outside the metal fitting to be fastened. In this case, the fastening is easier than in the above embodiment.

Further, in the present fastening structure and the fastener, a member to be fastened is fixed to the end face of the member to be fastened, similarly to the above embodiment, for fastening members other than the columnar object.
It goes without saying that the present invention can be similarly carried out by clamping and fixing the metal fittings to be fastened by the metal fittings for fastening.

Further, in the above embodiment, the metal fitting to be fastened is integrally fixed to the columnar member which is the member to be fastened by welding, but it can also be integrally formed with the member to be fastened. In particular, when the member to be fastened is made by integral molding, such as casting, ceramic or plastic, the end to be fastened to the member to be fastened by integral molding is used. It may be formed.

In the above embodiment, the fastening member and the fastening member are made of a casting in view of the manufacturing cost. However, metals other than the casting, such as steel for general structural use, are used.
It is needless to say that high-strength steel, stainless steel, or the like may be used, and that the present invention can be similarly carried out using plastic (for example, reinforced plastic) or ceramic other than metal.

[0041]

According to the fastening structure of the present invention, very strong fastening can be achieved without forming a projection on the outer peripheral portion of the fastening portion of the two fasteners to be fastened as required. Obtainable. And since it is very simple in structure, it can be easily and inexpensively performed, and a highly reliable fastening can be obtained without requiring the skill of an operator at the time of fastening.

In addition, compared to welding by welding, no on-site welding equipment is required, and the reliability of the fastening portion is improved.
Therefore, it is a particularly excellent fastening structure for fastening under a special environment such as the sea as well as a general building.

According to the fastener of the present invention,
Since the fasteners to be fastened are fixed to the ends of members such as pillars to be fastened, and these fasteners only need to be clamped and fixed by the fasteners, the above-described fastening structure has to be implemented. Make it easy.

[Brief description of the drawings]

FIG. 1 is a plan cross-sectional view of a fastening portion (a view taken along the line II-II ′ in FIG. 2) showing a fastening structure according to an embodiment of the first invention of the present application.

FIG. 2 is a view taken along the line II ′ of FIG. 1 showing the fastening structure of FIG. 1;

FIG. 3 is a plan cross-sectional view of a fastening portion of the fastening structure shown in FIG. 1 in a fastening completed state (viewed along the line IV-IV ′ in FIG. 4).

FIG. 4 shows a fastening portion in a fastening completed state, taken along III-II in FIG.
FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fastener 1A ... U-shaped recess 2 ... Fastener 2a ... Flange 2b ... Contact surface 2c ... Surface away from the contact surface

Claims (10)

[Claims] A fastener to be fastened is integrally formed at each of opposed ends between two members to be fastened, and the fasteners are used in a state where the fasteners are brought into contact with each other. A fastening structure configured to clamp and fix the two members to each other, wherein an inwardly projecting flange is provided at a fastening end of the metal fitting to be fastened, and The surface on the side separated from the contact surface is formed in a tapered shape that becomes thinner on the inner peripheral end side, and the fastening metal fitting has a concave section having a U-shaped cross section that sandwiches the two opposed and abutting flange portions. In addition, the opposed inner surface of the U-shaped concave portion is formed with a tapered surface corresponding to the tapered shape of the metal fitting to be fastened, and the flange is brought into contact with the flange portion of the metal fitting to be fastened. The U-shaped concave part of the fastening bracket So that a constant,
A fastening structure wherein two members are fastened by being fitted by screwing means. 2. The fastening structure according to claim 1, wherein the flange portion is annularly provided around an end face of the metal fitting to be fastened. 3. The fastening structure according to claim 1, wherein a plurality of the fastening members are provided at appropriate intervals on an inner periphery of the fastening member. 4. A female screw hole for screwing is formed in the fastener, and a through-hole is formed in a position corresponding to the female screw hole of the fastener to be fastened. The fastening structure according to any one of claims 1 to 3, wherein a bolt is screwed into the female screw hole from the outside through a through hole. 5. A fastener to be fastened is integrally fixed to each longitudinally opposed end between two pillars to be fastened, and these opposed fasteners are brought into contact with each other. A fastening structure configured to fasten the two columnar objects in the longitudinal direction by a fastening metal in a state, and providing a flange portion projecting inward at a fastening end of the metal fitting to be fastened; The surface of the flange portion on the side away from the contact surface is formed in a tapered shape that becomes thinner on the inner peripheral end side, and a cross-section for clamping the two facing and abutting flange portions on the fastening fitting. While providing a concave portion of the shape, the opposing inner surface of the U-shaped concave portion is formed by a tapered surface corresponding to the tapered shape of the metal fitting to be fastened, and in a state where the metal fitting to be opposed comes into contact, the Two flanges abutting from inside By fastening the metal fitting to the metal fitting to be fastened from outside of the metal fitting to be fastened so that the U-shaped of the metal fitting is clamped and fixed, the two columnar objects are fastened. Characterized fastening structure. 6. The fastening structure according to claim 5, wherein the column is a square pipe. 7. The fastening structure according to claim 6, wherein an outer periphery of the metal fitting to be fastened is substantially equal to an outer periphery of the square pipe. 8. The fastening structure according to claim 7, wherein said fasteners are provided at four corners of said fastener. 9. A fastener to be fastened is integrally fixed to each of the opposing ends between two members to be fastened, and the fastener is used in a state where the fasteners are brought into contact with each other. A fastener used in a fastening structure for fastening the two members by sandwiching and fixing from both sides, wherein the fastener is in a direction orthogonal to a direction in which the fastener is to be connected to a fastening end. A metal fitting for fastening, which is provided with a protruding flange portion, and which is formed in a tapered shape in which a surface on a side separated from the contact surface of the flange portion becomes thinner on an inner peripheral end side,
A recess having a U-shaped cross section for sandwiching the two opposed and abutting flange portions, and a confronting inner surface of the U-shaped recess formed by a tapered surface corresponding to the tapered shape of the metal fitting to be fastened. A fastener comprising: a metal fitting; and a screwing means for screwing the metal fitting to be fastened to the metal fitting to be fastened and the metal fitting to be fastened. 10. The screwing means, wherein a female screw hole is formed in one of the metal fitting to be fastened and the metal fitting for fastening, and a through-hole is formed in the other, and the metal fitting to be fastened, in which the through-hole is formed, or The fastener according to claim 9, wherein a bolt is screwed into the fastener or the fastener to which the female screw hole is formed from the fastener.