JP3430172B1 - Telescopic connecting member - Google Patents

Abstract

[PROBLEMS] For example, it is used for a connecting portion of a rod or a bolt in a building structure or the like, and can easily connect such a rod or a bolt without requiring high-precision dimension setting. To provide a telescopic connecting member having a novel structure. SOLUTION: An insertion rod 14 is inserted into a hollow outer sleeve 12 from one end 22a in the axial direction, and cannot be pulled out in the axial direction with respect to the outer sleeve 12 so as to be stretchable and extendable around a central axis. And the other end 2 of the outer sleeve 12 in the axial direction.
Screw connection portions 26 and 40 for separate members 52 and 52 are provided at 2b and the protruding end of the insertion rod 14, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable connecting member having a novel structure, which is preferably used for connecting structural members such as frames or hanging a ceiling in a building structure. .

[0002]

BACKGROUND ART Conventionally, a turnbuckle provided with a right screw and a left screw at both axial ends has been used as a connecting member for connecting rods or the like to which tensile force is exerted, such as bracing in a building structure, to each other. Well known. If this turnbuckle is used, a right screw and a left screw are formed at each end of a pair of rods to be connected to each other, and screwed at both ends in the axial direction of the turnbuckle, whereby the pair of rods are axially connected. The turnbuckles can be connected to each other in a direction and the length can be adjusted by rotating the turnbuckle to adjust the tension force.

However, in such a conventional rod connecting structure using a turnbuckle, since the axial length of the turnbuckle itself is constant, a pair of rods are connected to each other by a turnbuckle. In advance,
If the ends of the pair of rods that connect to each other are separated by a distance that corresponds to the axial length of the turnbuckle to be used and are positioned to face each other, the length of the turnbuckle must be accurately determined. There was a problem that the end of the rod could not be screwed on.

That is, if the distance between the ends of the pair of rods to be connected is too large as compared with the axial length of the turnbuckle, the turnbuckle may be connected without reaching between the ends of the pair of rods. Conversely, if the distance between the ends of the pair of rods to be connected is too small compared to the axial length of the turnbuckle, the turnbuckle is placed between the ends of the pair of rods. It is difficult to insert and it becomes impossible to connect.

In order to deal with such a problem,
For example, it is possible to use a long and large turnbuckle to increase the axial length of the rod that can be screwed in and out of the turnbuckle, but a large turnbuckle is cumbersome to handle and expensive. In addition, if the size of the rod that needs to be screwed in and out of the turnbuckle becomes large, the labor and time required for the construction increase correspondingly, which is not realistic.

It is also conceivable to increase the adjustable amount of the length of the entire rod by dividing the rod into three or more and increasing the number of turnbuckles to be mounted. It is unavoidable that the number of points will increase, the construction will be troublesome, and the cost will increase, and in addition, there is a possibility that the strength of the rod will decrease, and so it was by no means an effective measure.

[0007]

The present invention has been made in view of the circumstances as described above, and the problem to be solved is to use, for example, a connecting portion such as a rod or a bolt in a building structure or the like. It is therefore an object of the present invention to provide a retractable connecting member having a novel structure, which can easily connect such rods and bolts without requiring highly accurate dimension setting.

[0008]

Aspects of the present invention made to solve such problems will be described below. The constituent elements used in each of the following aspects can be used in any combination as much as possible. Further, the aspects and technical features of the present invention are not limited to those described below, but are described in the entire specification and the drawings, or the invention idea that can be understood by those skilled in the art from those descriptions. It should be understood that it is recognized based on this.

First, according to a first aspect of the present invention, an insertion rod is inserted into a hollow outer sleeve from one end portion in the axial direction thereof, and the outer sleeve is expanded and contracted in such a manner that it cannot be pulled out in the axial direction. The outer sleeve is freely and relatively rotatable about the central axis, and the other end in the axial direction of the outer sleeve and the protruding side end of the insertion rod are provided with threaded connecting portions for separate members, respectively. A pair of separate members screwed to the threaded connecting portion can be tension-connected to each other in a stretched state of the outer sleeve and the insertion rod, while the protruding end portion of the insertion rod is in a contracted state. And a retractable connecting member that engages with the opening of the outer sleeve so as not to be rotatable relative to the opening about the central axis so as to exert a turning force exerted on the outer sleeve on the insertion rod. To do.

In the connecting member having the structure according to the present embodiment as described above, the connecting member is placed in a contracted state between the facing portions of another member such as a pair of rods to be connected to each other, and then expanded. Separate members such as a pair of rods by screwing and fixing the axial end portion of the outer sleeve side to one rod or the like and screwing and fixing the axial end portion of the insertion rod side to the other rod or the like. The pair of connecting members such as the rods can be easily connected to each other by connecting them together.

That is, in the connecting member having the structure according to the present embodiment, the outer sleeve and the insertion rod are made to expand and contract by being relatively displaced in the axial direction, and in addition, the outer sleeve and the insertion rod are relatively movable about the central axis. By being rotatable, it can be expanded and contracted according to the distance between the facing surfaces of a pair of rods and the like to be connected, the spiral structure, etc. Since they can be connected, excellent workability and adaptability can be realized when connecting a pair of rods and the like with such a connecting member.

Further, in this aspect, in the contracted state of the outer sleeve and the insertion rod, the protruding end of the insertion rod is integrally engaged with the opening of the outer sleeve so as not to be rotatable relative to the opening about the central axis. Therefore, when connecting the insertion rod to another member, even when the end of the other member is narrow and recessed, the outer sleeve is inserted in the contracted state as described above. By operating the rod in the same manner as a box wrench, the outer sleeve is operated to exert an operating force applied to the outer sleeve on the insertion rod, so that the insertion rod can be easily attached to another member at the back. It can be screwed on. Then, after the insertion rod is screwed, it is possible to quickly release the outer sleeve from the engagement with the inner cylinder rod by setting the outer sleeve in the extended state, and the outer sleeve with respect to another member. It can be easily screwed on.

In this embodiment, the separate member is not particularly limited, but may be a long bolt, a rod having a male screw or a female screw at its end, or the like. Further, the connecting member of the present aspect can be appropriately adopted when connecting a pair of separate members such as a rod adopted in a building structure or other fields, and specifically, for example, a building structure. With regard to the connection, in addition to connecting parts such as rods that form braces that reinforce structural materials such as beams, columns, and foundations, cooperation of suspension rods for suspending the ceiling (including the ceiling base) on the upper structural material It can be suitably adopted in a site or the like. Further, the threaded connection portion can be advantageously configured by the screw portion of the bolt or nut by, for example, fixing the bolt or nut to the end portion of the insertion rod or the outer sleeve. Furthermore, the spiral structure of the threaded connection portion is not particularly limited, and a right screw, a left screw, or the like can be appropriately adopted depending on the spiral structure of another member to be screwed.

According to a second aspect of the present invention, in the expandable joint member according to the first aspect, a polygonal fitting cylinder portion is formed in one axial opening of the outer sleeve. In the insertion rod, a polygonal fitting portion that is fitted into the fitting tubular portion in a contracted state is provided. In this aspect, in the contracted state of the insertion rod and the outer sleeve, the protruding end of the insertion rod is integrally fixed to the opening of the outer sleeve so as not to be rotatable relative to the opening about the central axis. It is possible to more effectively realize that the turning force exerted on the outer sleeve can be exerted on the insertion rod.

A third aspect of the present invention is, in the expandable joint member according to the first or second aspect, wherein the outer sleeve and the insertion rod are in a contracted state, and It is characterized in that the tip portion is made to project from the outer sleeve with a predetermined length. In this aspect, the insertion rod does not completely enter and hide in the outer sleeve in the contracted state, and the shaft rod can be easily pulled out from the contracted state, thereby facilitating handling and working. Will be easier.

Further, a fourth aspect of the present invention is, in the expandable joint member according to any one of the first to third aspects, an annular locking is provided near one axial opening of the outer sleeve. A member is fixed so that the insertion rod is inserted through the locking member, and a locking head is provided at the insertion side end of the insertion rod, and the locking head is engaged with the locking member. It is characterized in that the stopper action prevents the insertion rod from coming out of the outer sleeve. In this aspect, it is possible to easily realize a mechanism for connecting the insertion rod and the outer sleeve so as to be rotatable relative to each other about the central axis and to be extendable and retractable in the axial direction.

A fifth aspect of the present invention is the expandable linking member according to any one of the first to fourth aspects, wherein the other axial end of the outer sleeve is:
Forming the operation part having a polygonal outer peripheral surface shape,
Characterize. In this aspect, the rotational operation force for the outer sleeve can be efficiently exerted by using a spanner or the like, and in particular, the operation force exerted on the outer sleeve under the contracted state is exerted on the insertion rod. Also in this case, the rotation operation force can be applied with better workability.

[0018]

Embodiments of the present invention will be described below with reference to the drawings in order to more specifically clarify the present invention.

First, FIGS. 1 and 2 show a tensioning device 10 as a first embodiment of a retractable connecting member according to the present invention. The pulling device 10 includes an outer tube fitting 12 as an outer sleeve and an inner bolt 1 as an inner rod.
4 and includes these outer tubular metal fittings 12
And the insertion bolt 14 are relatively displaceable in the axial direction and relatively rotatable about the central axis, and as shown in FIG. 3, the brace of the building structure 16 (included in the diagonal member). The same applies hereinafter.) 18 forms a part.

More specifically, the outer tubular member 12 has a substantially cylindrical shape, and is fitted into the opening portions at both ends thereof via stepped portions 20 that expand outward in the axial direction in a reverse taper shape. The joint cylinder part 22 is integrally formed. The fitting tubular portion 22 is
It has a hexagonal tubular shape. In addition, in the present embodiment, one end (left side in FIG. 1) in the axial direction of the outer tubular metal fitting 12 is configured to include the fitting tubular portion 22a as an operating portion, and the outer tubular metal fitting 12 is also provided. The other end (right side in FIG. 1) in the axial direction is configured to include a fitting tubular portion 22b as a fitting portion.

Further, the first nut 24 is inserted into the one fitting cylinder portion 22a and fixed by press fitting, or by welding or the like if necessary. The first nut 24 is a hexagonal high nut, and the screw portion 26 of the first nut 24 constitutes a threaded connection portion of the outer tubular fitting 12. Further, one end of the first nut 24 is in contact with the step portion 20, and the other end of the first nut 24 projects axially outward from the opening end portion of the fitting tubular portion 22a by a predetermined length. Therefore, it is possible to easily apply a turning operation force to the protruding portion from the outside with a spanner or the like.

Further, a locking ring 28 as an annular locking member is inserted into the other fitting cylinder portion 22b by press fitting, or is fixed by welding or the like if necessary. The locking ring 28 is a hexagon nut and has a height (see FIG. 1).
The inner and axial dimensions are set smaller than the height of the fitting tubular portion 22b. Further, in the present embodiment, one end (left in FIG. 1) of the locking ring 28 is in contact with the step portion 20, and the other end of the locking ring 28 (in FIG. 1,
The right end is located in the fitting tubular portion 22b, and is located in the fitting tubular portion 22b between the other end of the locking ring 28 and the opening end of the fitting tubular portion 22b. An accommodation space 30 having a hexagonal cross section is provided.

Further, the inner cylinder 12 is provided with the inner insertion bolt 14 in an inserted state. One of the insertion bolts 14 is the insertion side end (left side in FIG. 1).
A bolt head 32 as a locking head at the end of the
Further, it is a long hexagonal bolt having a short overall length male thread portion 34 as a threaded coupling portion at the other end portion as the protruding side end portion. The outer diameter of the cylindrical portion 36 of the insertion bolt 14 is much smaller than the inner diameter of the outer tubular fitting 12 and is slightly smaller than the inner dimension of the locking ring 28. . Further, the outer dimension of the bolt head 32 is slightly smaller than the inner diameter dimension of the outer tubular fitting 12, and is sufficiently larger than the inner dimension of the locking ring 28.

A second nut 38 is screwed onto the male screw portion 34 of the insertion bolt 14 and further welded if necessary so as to be fixed so as not to move in the axial direction. The second nut 38 is a hexagonal nut, and the screw portion 40 other than the portion screwed to the male screw portion 34 of the inner insertion bolt 14 serves as the screw connection portion of the inner insertion bolt 14 in the present embodiment. Has been done.

The interpolating bolt 14 is used for the bolt head 3
2 is accommodated in the outer tubular metal fitting 12, and the second nut 38
Is positioned axially outward of the locking ring 28, and is inserted into the outer tubular metal fitting 12 through the locking ring 28, so that the outer tubular metal fitting 12 is rotated about the central axis. It is arranged so as to be relatively rotatable and axially displaceable.

In particular, in this embodiment, with the outer cylinder fitting 12 and the inner insertion bolt 14 assembled as described above, as shown in FIG. 1, the bolt head 32 and the outer cylinder fitting 12 are assembled.
With the first nut 24 provided at one end portion (fitting tubular portion 22a) abutting, the male screw portion 34 of the insertion bolt 14 of the outer tubular fitting 12 (fitting tubular portion 22b). The second nut 38 is positioned in the accommodation space 30 and the second nut 38 is fitted into the fitting tubular portion 2.
2b, and one end (left in FIG. 1) of the second nut 38 is positioned in the accommodation space 30 of the fitting tubular portion 22b, and the other end of the second nut 38 ( The end (right side in FIG. 1) is located axially outward from the fitting tubular portion 22b. As a result, the second nut 38 at the protruding end portion of the inner insertion bolt 14 is attached to the outer tubular fitting 1.
The second nut 38 and the outer tubular fitting 12 are integrally rotatable with respect to the second opening (fitting tubular portion 22b) about the central axis. . In the present embodiment, such a state is referred to as a contracted state of the outer cylinder fitting 12 and the inner insertion bolt 14. As is apparent from the above description, the polygonal fitting portion fitted into the fitting tubular portion 22b in the contracted state of the outer tubular fitting 12 and the insertion bolt 14 has the second nut 38 formed of a hexagonal nut. It is configured to include. Also, it is screwed onto the male screw portion 34 of the insertion bolt 14,
In addition, the second nut 38 (screw portion 40) that is substantially the tip portion of the insertion bolt 14 is made to project from the outer tubular metal fitting 12 (fitting tubular portion 22b) with a predetermined length in the contracted state. ing. In the present embodiment, the protrusion of the second nut 38 from the outer tubular metal fitting 12 is determined by the insertion bolt 14 and the outer tubular metal fitting 1.
It is realized by abutment of the first nut 24 provided on one end of the No. 2.

Further, in the present embodiment, the outer tubular metal fitting 12 and the inner insertion bolt 14 are relatively axially moved from the contracted state of the outer tubular metal fitting 12 and the inner insertion bolt 14 as shown in FIG. By displacing outwardly, the second nut 38 is pulled out from the fitting tubular portion 22b, and as shown in FIG. 5, substantially the entire cylindrical portion 36 of the insertion bolt 14 and the second nut 38 at the tip end. The bolt head 32 is projected to the outside from the opening (fitting cylinder portion 22b) of the outer cylinder fitting 12, and the bolt head 32 is locked to the locking ring 28 so that the insertion bolt 14 is inserted from the outer cylinder fitting 12 to the outside. It is designed to prevent you from getting out. In the present embodiment, the state from the contracted state of the outer cylinder metal fitting 12 and the insertion bolt 14 shown in FIG. 1 to the engagement of the bolt head 32 shown in FIG. 12 and the insertion bolt 14 are in an extended state. Further, in the extended state, the second nut 38
While the second nut 38 and the outer tubular fitting 12 are relatively unrotatable around the central axis in a state where the second nut 38 is fitted in the fitting tubular portion 22b, the second nut 38 is pulled out from the fitting tubular portion 22b. In this state, the second nut 38 and the outer cylinder fitting 12 are relatively rotatable about the central axis. In addition, as is apparent from the above description, in the present embodiment, the outer tubular metal fitting 12 of the inner insertion bolt 14 is locked by the locking ring 28.
Locking head that prevents slipping out of the
It is composed of four bolt heads 32.

Incidentally, as a specific example of a method of manufacturing the tension device 10 having the above-mentioned structure, for example, the fitting cylinder portion 2
The insertion bolt 14 is inserted into one of the openings (fitting tubular portion 22a) of the outer tubular metal fitting 12 into the outer tubular metal fitting 12 having the locking ring 28 fixed to the second nut 38.
Is fitted and welded, and the fitting tubular portion 2 of the outer tubular fitting 12 is attached.
The tension device 10 is realized by fixing the first nut 24 to 2a, or the other opening (fitting) of the outer cylinder fitting 12 is fitted to the outer cylinder fitting 12 where the first nut 24 is fixed to the fitting cylinder part 22a. While inserting the insertion bolt 14 from the fitting cylinder portion 22b), the locking ring 28 is attached to the male screw portion 34 of the insertion bolt 14.
From the fitting tubular portion 2 while being inserted from the
2b and the male screw portion 34 of the insertion bolt 14
It is possible to realize the tensioning device 10 by screwing a second nut on.

Further, the tensioning device 1 having such a structure
0 is a brace 1 of the building structure 16 as also shown in FIG.
It is adopted in 8. The building structure 16 is configured to include a frame 48 including a barrel (including a flat object) 42, a pair of columns 44, 44, and a base 46, and a corner portion of the frame 48, in other words, a barrel. At the joints between the columns 42 and the pillars 44 and at the joints between the pillars 44 and the base 46, diagonal fixing metal fittings 50 are fixed.

Further, on the two diagonal lines of the frame 48, a pair of metal rods 52a, 52 as separate members, respectively.
b is provided. These rod 52a and rod 52
b has screw parts at both ends, and the lengths thereof are not particularly set to the same, and on the diagonal line of the frame body 48,
One end of the rod 52a is fixed to the fixing metal piece 50 on one diagonal line (for example, upper left) by screwing or welding, and one end of the rod 52b is on the other diagonal line (for example, lower right). The other end 54a of the rod 52a and the other end 54b of the rod 52b, which are fixed to the metal fitting 50 and are not fixed to the fixing hardware 50, are arranged so as to face each other with a predetermined separation distance on the diagonal line of the frame 48. .

In the present embodiment, these rods 5
Between the other end 54a of 2a and the other end 54b of the rod 52b,
The tensioning device 10 as described above is arranged and the insertion bolt 14
The second nut 38 (screw portion 40) at the tip of is connected to the screw portion provided at the other end 54a of the rod 52a by screwing, and the first nut 24 (screw portion 26) of the outer tubular metal fitting 12 is The pair of braces 18 arranged on diagonal lines of the frame 48 is configured by being screwed and connected to the screw portion provided on the other end 54b of the rod 52b. The pillar 44, the barrel 42 and the base 46, the pillar 44 and the pillar 44, the pillar 44 and the base 46, and the like are fixed to each other.

By the way, the tensioning device 10 is used for the building structure 16
The frame 48 can be constructed as follows, for example.

First, the pulling device 10 in which the outer tubular metal member 12 and the insertion bolt 14 are in a contracted state is provided at the other end 54a of the rod 52a as one separate member and at the other end 54b of the rod 52b as another separate member. A second nut 38 provided at the tip of the insertion bolt 14 while being placed between them and arranged on the same central axis
Is located at the other end 54a of the rod 52a, and either one of the fitting tubular portions 22a and 22b (the fitting tubular portion 22a in the present embodiment) of the outer tubular metal fitting 12 or the first nut 24 and the second nut. By rotating one of the nuts 38 (first nut 24 in the present embodiment) around the central axis using a spanner or the like as necessary, the second nut 38 (screw) of the insertion bolt 14 is rotated. The portion 40) is screwed onto the other end 54a of the rod 52a.

Further, the outer cylinder fitting 12 is axially outwardly displaced from the insertion bolt 14 fixed to the rod 52a, and the second nut 38 is moved from the fitting cylinder portion 22b of the outer cylinder fitting 12 to the tensioning device 10. It is in an extended state in which it projects outward in the axial direction. Then, the first nut 24 fixed to the outer tubular fitting 12 is attached to the rod 5
It is positioned at the other end 54b of 2b, and either one of both fitting tubular portions 22a and 22b of the outer tubular metal fitting 12 (in the present embodiment,
By rotating the fitting tubular portion 22a) around the central axis using a spanner or the like as necessary, the first nut 24 (screw portion 26) of the outer tubular metal fitting 12 is moved to the other end 54b of the rod 52b.
Screw into. As a result, the pair of rods 52a and 52b are connected to each other in the central axis direction by the pulling device 10.

After that, by adjusting the screwing amount of the rod 52a with respect to the second nut 38 of the insertion bolt 14 and the screwing amount of the rod 52b with respect to the first nut 24 of the fitting 12, the tension exerted on the braces 18 is adjusted. The force is adjusted, which completes the construction of the tensioning device 10.

In the tensioning device 10 having such a structure, the outer tube fitting 12 and the inner insertion bolt 14 are relatively displaceable in the axial direction and relatively rotatable about the central axis. , Attached rods 52a, 52b
Since the expansion and contraction state of the outer tubular metal fitting 12 and the bolt is adjusted according to the distance between the facing surfaces of the frame body to form the brace 18 of the frame body 48, excellent workability can be realized. Rods 52a, 52b according to the size of 48
Since it is not necessary to precisely adjust the length of, the manufacturing cost and the construction cost can be advantageously reduced.

Further, in this embodiment, the second nut 38 is fitted to the outer tubular metal fitting 12 by fitting the fitting tubular portion 22b and the second nut 38 with the outer tubular metal fitting 12 and the insertion bolt 14 contracted.
Since the rotation power applied to the outer tubular metal fitting 12 can be applied to the inner insertion bolt 14 by integrally rotating the same with respect to the opening portion of the outer peripheral portion so as not to be able to rotate relative to the central axis, an The tubular metal fitting 12 can be made to exhibit substantially the same function as a box wrench corresponding to the shape and size of the insertion bolt 14, so that the construction can be realized only with the wrench corresponding to the outer tubular metal fitting 12. Therefore, the manufacturing cost, the construction cost, etc. can be reduced and the connection strength can be improved.

Next, FIG. 6 shows a fixing device 60 as a second embodiment of a retractable connecting member according to the present invention. This fixing device 60 is configured to include an outer cylinder fitting 12 and a wood screw 62 as an insertion rod, and for example, as shown in FIG. 7, a reinforcing structure 6 for a wooden load-bearing wall.
8 can be advantageously employed. In the present embodiment, members and parts having substantially the same structure as those in the first embodiment are designated by the same reference numerals as those in the first embodiment in FIG. The detailed description of is omitted.

More specifically, the outer cylinder fitting 12 of this embodiment.
Has a substantially cylindrical shape, and a first nut 24 is fixed to one end (right side in FIG. 6) by welding or the like. A hexagonal nut 64 having a structure substantially similar to that of the first nut 24 is fixed to the other end (left in FIG. 6) of the outer tubular metal member 12 by welding or the like, and A fitting cylinder portion 22 having a hexagonal cylindrical body shape is fixed to an end portion of the outer cylinder fitting 12 opposite to the fixing side.

Further, a wood screw 62 is provided in such an outer cylinder fitting 12 in an inserted state. The wood screw 62 has a bolt head 32 at one end (right side in FIG. 6) as an insertion side end and the other as a protruding side end (FIG. 6).
It is a long hexagonal bolt having a screw portion 34 as a threaded connecting portion at the end portion of the center and left). Also, wood screws 62
The second nut 3 with the flange portion is provided on the cylindrical portion 36 of
8 is externally fitted and fixed by welding or the like.

Further, the wood screw 62 accommodates the bolt head 32 in the outer tubular metal fitting 12 and positions the second nut 38 axially outward of the hexagon nut 64 provided at one end of the outer tubular metal fitting 12. In this state, the hexagonal nut 64 is inserted and loosely inserted in the outer tubular fitting 12.

Further, in the present embodiment, when the outer tubular metal fitting 12 and the wood screw 62 are in the contracted state, the second nut 38 serves as the outer tubular metal fitting 12 (hexagon nut 6) as shown in FIG.
4) is fitted into the fitting cylinder portion 22 fixed to the second nut 38 fixed to the wood screw 62 and the hexagonal nut 64 fixed to the outer cylinder fitting 12, so that the second nut 38 is fixed. Is not rotatable relative to the outer tubular fitting 12 about the central axis.

The fixing device 60 having such a structure is, for example, as shown in FIG. 7, in the bearing wall structure having the wooden braces 66, 66, the columns 4 on both sides.
It can be advantageously used as a fastening and tightening tool for reinforcing rods arranged along the inside of 4,44. That is,
Since the fixing device 60 of the present aspect includes the wood screw 62 projected on one side in the axial direction, the wood screw 6
2 can be fixed by screwing it into the base 46 through the brace 66. On the other hand, on the other side in the axial direction of the fixing device 60, the first nut 24 is fixed similarly to the first embodiment, so that the upper end portion can be screwed and fixed to the barrel 42 with a wood screw structure. Reinforced rod 70
Can be screwed onto the first nut 24 at the male screw portion formed at the lower end thereof.

As a result, as shown in FIG. 7, the reinforcing rod 7 extending vertically along the pillar 44.
0, 70 can be assembled, and by the reinforcing rods 70, 70, the fixing devices 60, 60 of the present embodiment can be assembled.
The base 46 and the body insert 42 can be firmly fixed to each other through the joint, and the reinforcing structure 68 of the structural wall can be advantageously realized in cooperation with the brace 66, 66.

Although the embodiments of the present invention have been described in detail above, these are merely examples, and the present invention is
Depending on the specific description in these embodiments,
It should not be construed as limiting.

For example, in the above embodiment, bolts and wood screws were used as the insertion rods, but the invention is not limited to these. One end is provided with a block body as a locking head and the other end is provided. It is also possible to employ a rod-shaped member or the like having a screw portion as a screw connection portion.

Further, in the above-mentioned embodiment, the hexagonal bolt is adopted as the polygonal fitting portion, but it is also possible to employ a square bolt or the like, and accordingly, the shape and size of the fitting tubular portion are adapted. The size and the like can be changed appropriately.

Further, the part to which the present invention is applied is not limited to the braces forming the wall of the building structure as illustrated. For example, it can be advantageously applied to a hanging fitting for hanging a ceiling from a structural material.

Although not listed one by one, the present invention
It can be carried out in an embodiment in which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art, and such an embodiment does not depart from the gist of the present invention.
Both are included within the scope of the present invention,
Needless to say.

[0050]

As is apparent from the above description, in the connecting member having the structure according to the present invention, the outer sleeve and the insertion rod are arranged so as to be expandable and contractible and relatively rotatable about the central axis. By doing so, it is possible to easily mount and connect between members such as a pair of rods that should be connected to each other, and there is some error in the facing distance between the members such as a pair of rods. Even if there is, it is possible to deal with it, and excellent construction workability can be realized.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional explanatory view showing a tension device as a first embodiment of the present invention.

FIG. 2 is a view on arrow II-II in FIG.

FIG. 3 is a front explanatory view showing a specific example in which the tensioning device in FIG. 1 is arranged in a brace of a building structure.

FIG. 4 is a vertical cross-sectional explanatory view showing one operation mode of the tension device in FIG.

5 is a longitudinal cross-sectional explanatory view showing one operation mode of the tension device in FIG. 1. FIG.

FIG. 6 is an explanatory longitudinal sectional view showing a fixing device according to a second embodiment of the present invention.

FIG. 7 is a front explanatory view showing a specific example in which the fixing device shown in FIG. 6 is incorporated into a load bearing wall structure of a building structure.

[Explanation of symbols]

10 Tension device 12 Outer cylinder fittings 14 Internal bolt 22 Fitting cylinder 26,40 screw part 52 rod

Claims (5)

(57) [Claims] 1. A hollow outer sleeve in which an insertion rod is inserted from one end portion in the axial direction of the hollow outer sleeve so that the outer sleeve cannot be pulled out in the axial direction and is expandable and contractible and relatively rotatable about a central axis. While being movably assembled, a threaded connection portion for separate members is provided at the other axial end of the outer sleeve and the protruding end of the insertion rod,
A pair of separate members screwed to the threaded connecting portions can be tension-connected to each other in a stretched state of the outer sleeve and the insertion rod, while a protruding end of the insertion rod in a contracted state. A portion which is engaged with the opening of the outer sleeve so as not to be rotatable relative to the opening about the central axis so that the turning force exerted on the outer sleeve can be exerted on the insertion rod. Connecting member. 2. A polygonal fitting cylinder part is formed in one opening in the axial direction of the outer sleeve, while a polygonal fitting fit in the fitting cylinder part is contracted in the insertion rod. The stretchable connecting member according to claim 1, wherein the connecting member is provided with a portion. 3. The expansion / contraction according to claim 1 or 2, wherein a tip portion of the insertion rod is made to project from the outer sleeve by a predetermined length under the contracted state of the outer sleeve and the insertion rod. Flexible connecting member. 4. An annular locking member is fixed near one opening in the axial direction of the outer sleeve so that the insertion rod is inserted through the locking member, and the insertion side end of the insertion rod. The locking head is provided in the portion, and the locking action of the locking head to the locking member prevents the insertion rod from coming out of the outer sleeve. The elastic connecting member described. 5. The expandable joint member according to claim 1, wherein an operating portion having a polygonal outer peripheral surface shape is formed at the other axial end portion of the outer sleeve.