JP2016164452A - Tension adjusting device and brace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tension adjusting device which can easily perform tension adjustment by using a light-weight tool in addition to the dimension adjustment of a brace as a whole, is small in size, and improved in appearance and economy, and the brace using the same.SOLUTION: A tension adjustment device 5 is composed of a bolt main body 1 and a pair of female screw members 6, 7a. An end part joining member 23 is connected to one female screw member 6, a round steel made brace main body 21 is screwed to the other female screw member 7a, and a brace 40 is formed. Furthermore, by covering a pair of the female screw members 6, 7a with a cylindrical member 41 which is divided into an axial core direction while opening the cylindrical member so as to straddle a pair of the female screw members, and pouring a grout material 42 which is composed of high-intensity non-shrinkage cement or the like from an opening part 41a, the protection and curing of male screw parts 3, 4 of the bolt main body 1 become possible. At the pouring, since the grout material 42 is made to smoothly flow by the existence of a plurality of grooves 2a which are formed at a periphery of a tool locking part 2, a pouring effect can be enhanced.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a tension adjusting device suitable for a building brace and a brace formed by connecting a brace body such as a round steel to the tension adjusting device.

  The steel frame frame structure is a structure in which steel columns and steel beams, which are main structural members, are rigidly joined, and is widely used in small and medium steel structures. In such a frame, in order to improve the earthquake resistance of the building, it is common to attach braces at diagonal positions of a rectangular frame surface surrounded by a steel column and a steel beam. The brace used here is, for example, a pair of round steel having a right-handed screw (positive screw) formed at the end and a left-handed screw (reverse screw) formed at the end as a tensile member constituting the brace body. Using round steel (referred to as turnbuckle bolts), these round steels are screwed close to or away from each other via a pair of female screws provided at both ends, and the total length of the tension member is adjusted and tension is adjusted. It consists of a turnbuckle barrel for adjusting. The turnbuckle cylinder is roughly divided into a split frame type and a pipe type, and both have a structure in which the turnbuckle cylinder is rotated and tightened while being reversed and loosened.

  Incidentally, in order to reduce the size and improve the aesthetic appearance of the turnbuckle body in the building brace, an alternative tension adjusting means has been proposed (see Patent Document 1). This turnbuckle has a right and left threaded portion at both ends, a columnar body having a hexagonal columnar spanner, etc. in the middle, and a pair of female threads that are screwed into the left and right male threaded portions. And a tensile member such as a steel pipe is joined to the other end of each rod portion. Therefore, when adjusting the tension of the tension member by rotating the body part, a spanner adapted to the spanner hanging part at the center of the body part is used. In this case, as the tensile strength required for the brace increases, the outer diameter of the entire trunk portion including the spanner hook portion inevitably increases, and the weight of the brace body also increases. For this reason, the spanner corresponding to this must be a heavy article. In addition, the installation of braces on a steel frame structure is often a work at a high place, and there is a problem that the handling becomes very dangerous work. In addition, it is uneconomical to increase the cost by screwing both ends of the large brace body.

JP-A-6-313411

  The present invention has been made in view of these problems of the prior art. In addition to adjusting the dimensions of the entire brace, the tension can be easily adjusted with a lightweight tool, which is economical, more compact, aesthetic and economical. It is an object of the present invention to provide a tension adjusting device having improved and a brace using the same.

  In order to solve the above-described problems of the prior art, in the tension adjusting device according to claim 1, a plurality of grooves are formed on the circumferential surface at substantially equal intervals along the axial direction. A bolt body having a right thread portion and a left thread portion on one end side and the other end side, and one female screw member and the other female screw member respectively screwed into the right thread portion and the left thread portion of the bolt body, A technical means is adopted in which the pair of female screw members are brought close to or separated from each other by the rotation of the tool latching portion of the bolt body. It is more convenient if the outer diameters of the tool hooking portion and the pair of female screw members are substantially the same (claim 2).

  Further, the brace according to claim 3 is provided with a right screw portion on one end side and the other end side of a bowl-shaped tool hook portion in which a plurality of grooves are formed on the peripheral surface at substantially equal intervals along the axial direction. A bolt main body having a left screw part, a female screw member and a female screw member that are screwed into the right screw part and the left screw part of the bolt main body, respectively, and by rotation of the tool latching part of the bolt main body, A tension adjusting device that brings the pair of female screw members close to or away from each other and a brace body that is attached to at least one female screw member of the tension adjusting device. Further, in this brace, a cylindrical member divided in the axial direction is placed so as to straddle between the pair of female screw members of the tension adjusting device, and the grout material is filled into the gap portion from the opening of the cylindrical member. (Claim 4).

In the tension adjusting device and the brace according to the present invention, the following effects can be obtained by adopting the above configuration.
(1) When adjusting the length of the entire brace by displacing a pair of female threaded members that are screwed to both sides of the bolt body in the direction of approaching or separating from each other, adjust the tension of the tension member after installation on the steel frame For example, instead of using a conventional wrench, a screwdriver or a screwdriver may be inserted into the groove formed on the peripheral surface of the tool retaining part and rotated. The use of tools enables safe work even in high places.
(2) If the outer diameter of the tool latching part of the tension adjusting device and the pair of female screw members located on both sides of the tool adjusting part are almost the same, the appearance will be uniform and the aesthetics will be improved. Suitable for location.
(3) In the brace installed in a predetermined tension state, when there is a gap between the tool hooking portion of the bolt body and the end face of the female screw member, the brace is axially oriented with respect to the pair of female screw members. By covering the divided cylindrical member so as to straddle both and injecting the grout material into the inside from the opening of the cylindrical member, the void portion inside the tension adjusting device can be filled. At this time, the grooves formed in the peripheral surface of the tool hooking part help the free flow of the grout material and enhance the filling effect. As a result, it is possible to effectively prevent stress concentration on a specific portion in the tension adjusting device, in particular, the male screw portion having the smallest cross-sectional area, and to prevent loosening.

It is the front view and side view of a volt | bolt main body used by this invention. FIG. 2 is a front view and a side view of a tension adjusting device according to the present invention in which a pair of female screw members are screwed to the bolt body of FIG. 1. It is the front view and top view of brace which concern on the 1st Embodiment of this invention which combines a brace main body with the tension adjustment apparatus of FIG. It is the front view of the brace which concerns on 2nd Embodiment of this invention, and the top view which showed a part in cross section. It is the front view and top view of a brace which concern on 3rd Embodiment of this invention. It is the top view which showed the principal part of the brace which concerns on the modification of 2nd Embodiment. It is a perspective view of the cylindrical member used with the modification of FIG.

  The tension adjusting device according to the present invention is used for tightening a screw driver or a wire to a groove provided in a tool hooking portion of a bolt body when adjusting the length of the entire brace or adjusting the tension after installation. It has a technical feature in that it can be rotated by inserting a simple lightweight tool such as Shino. The tool hooking portion may be integrally formed with the bolt body by cutting or forging, or may be fitted as a separate part. The number of grooves for inserting the tool is preferably about four or six at regular intervals on the circumference. It is particularly preferable that the outer diameter is substantially the same as that of the pair of female screw members screwed to both ends. Furthermore, after connecting both ends of the brace to the steel frame, the female screw members located on both sides of the bolt body were divided with a steel cylindrical member having an inner diameter corresponding to the outer diameter of the female screw member. A grout material such as high-strength non-shrinkage cement may be injected into the inside from the opening.

  In addition, the brace body that is connected to the tension adjusting device and constitutes the brace is preferably a steel bar or a steel pipe having a circular or rectangular cross-section, and can be appropriately selected depending on whether it is used as a tension brace or a compression brace. Good. When these braces are pin-joined to the corner portion of the frame surface, clevis, pin bolts, or the like can be used as a joining member provided at the end of the brace body. The brace body may be connected to at least one side of the tension adjusting device. In this case, the end joint member is connected to the other side of the tension adjusting device. Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to these embodiments, and various modifications can be made within the technical idea of the present invention.

  1A and 1B are a front view and a side view, respectively, of a bolt body used in a tension adjusting device according to the present invention. The illustrated bolt body 1 is formed by forming a left side (one end side) and a right side (other end side) of a tool hooking portion 2 projecting like a bowl at the center into a right screw portion 3 and a left screw portion 4, respectively. is there. In the tool hooking portion 2, four grooves 2a each having a U-shaped cross section are provided on the circumference at almost 90 ° intervals along the axial direction.

  2A and 2B are a front view and a side view, respectively, of the tension adjusting device according to the present invention. The tension adjusting device 5 includes the bolt body 1 and a pair of female screw members 6 and 7 shown in FIG. In this case, one female screw member 6 and the other female screw member 7 that are respectively screwed into the right screw portion 3 and the left screw portion 4 of the bolt body 1 are formed in a cylindrical shape with a female screw provided over the entire length thereof. The brace body made of round steel can be screwed. Further, the outer diameters of the pair of female screw members 6 and 7 are formed to be substantially the same as the outer diameter of the tool hooking portion 2 of the bolt body 1. Note that the pair of female screw members 6 and 7 may not be through-holes and may have different overall lengths depending on the shape of the brace body and the end joining member coupled thereto and the coupling method.

  FIGS. 3A and 3B are a front view and a plan view showing a first embodiment of a brace according to the present invention suitable for a tensile brace. The brace 10 is connected to a brace body 11 made of flat steel on one end side of the bolt body 1 in the tension adjusting device 5 shown in FIG. 2 and is joined to a corner portion of a rectangular frame on the other end side. The end joining member 12 which consists of plate shape for pin joining with respect to a gusset plate etc. is couple | bonded. The brace body 11 and the end joining member 12 are welded in a state in which the female screw members 6 and 7 are fitted into rectangular notches (not shown) formed on the tension adjusting device 5 side. Furthermore, pin insertion holes 11 a and 12 a are formed in the opposite end of the brace body 11 and the end joining member 12, respectively.

  4 (a) and 4 (b) are a front view showing a second embodiment of a brace according to the present invention that is also suitable for a tensile brace, and a plan view partially showing a cross section. The illustrated brace 20 uses round steel for the brace body 21. In this case, one female screw member 6a screwed to one end side of the tension adjusting device 5 has a longer overall length than the other female screw member 7, and the male screw portion 21a formed at the end of the brace body 21 is screwed together. Yes. The opposite end of the brace body 21 and the other female screw member 7 are welded in the same manner as described above to the end joint members 22 and 23 having the pin insertion holes 22a and 23a, respectively.

  5A and 5B are a front view and a plan view showing a third embodiment of a brace according to the present invention suitable for a compression brace. The illustrated brace 30 includes a tension adjusting device 9 in which perforated disk-like flange members 8c and 8d are joined to opposite end surfaces of a pair of female screw members 8a and 8b that are screwed into the bolt body 1, and a round steel pipe. It consists of a brace body 31. One set of two end joint members 32 is welded to one female screw member 8a on the side surface so as to sandwich the female screw member 8a, and the end surface is also welded to the flange member 8c. In addition, a round steel pipe 31 is joined to the other female screw member 8b by welding the end surface thereof to the flange member 8d in a state of inclusion. Further, an end joining member 33 consisting of a set of two pieces is also welded to the flange member 8 e at the end face of the round steel pipe 31 on the other end side of the brace body 31. In addition, the periphery of the pin insertion holes 32a and 33a of the end joint members 32 and 33 is reinforced more thickly than the other portions in the same manner as the brace of the first embodiment shown in FIG. The bolt body used in FIG. 5 may be threaded using a thick steel pipe.

  In the above embodiments, the lengths of the braces 10, 20, and 30 are obtained by inserting and rotating a rod-shaped tool such as a screwdriver or a shino into the groove 2a formed in the bolt body 1 of the tension adjusting devices 5 and 9. This makes it easy to adjust the tension, eliminates looseness and sagging, and introduces tension into the brace.

  FIG. 6 is a plan view showing a main part of a brace according to a modification of the second embodiment, and FIG. 7 is a perspective view of a cylindrical member used in the brace. The illustrated brace 40 is a steel tubular member 41 that is divided in the axial direction with an inner diameter substantially the same as the outer diameter of the female screw members 6 and 7a with respect to the tension adjusting device 5 after the mounting to the steel frame is completed. A grouting material 42 made of high-strength non-shrinkage cement or the like is injected from the opening 41a. Thereby, it becomes possible to protect and cure the male screw portions 3 and 4 of the bolt body 1. At the time of injection, the flow of the grout material 42 is smoothly performed by the presence of the plurality of grooves 2a formed on the peripheral surface of the tool hooking portion 2, so that the injection effect can be enhanced. In the case of the third embodiment in FIG. 5, the cylindrical member 41 may be covered with the flange members 8c and 8d. In the brace of the present invention, between the end faces of the pair of female screw members 6 (6a) and 7 (7a) in the tension adjusting devices 5 and 9, the cross-sectional area is greatly changed and the outermost diameter is the smallest. For this reason, filling the portion with the grout material 42 is effective in preventing the occurrence of complex stress such as bending lateral stress during an earthquake and preventing stress concentration on the male screw portions 3 and 4.

  DESCRIPTION OF SYMBOLS 1: Bolt main body, 2: Tool hook part, 2a: Groove, 3: Right-hand thread part, 4: Left-hand thread part, 5, 9: Tension adjusting device, 6, 6a, 7, 7a, 8a, 8b: Female thread member 8c, 8d, 8e: flange member, 10, 20, 30, 40: brace, 11, 21, 31: brace body, 12, 22, 23, 32, 33: end joining member, 41: cylindrical member, 42: grout material

Claims (4)

  Bolt bodies each having a right thread portion and a left thread portion on one end side and the other end side of a hook-shaped tool hook portion in which a plurality of grooves are formed on the circumferential surface at substantially equal intervals along the axial direction; The female screw member includes one female screw member and the other female screw member that are respectively engaged with the right screw portion and the left screw portion of the bolt main body, and the pair of female screw members are brought close to or separated from each other by rotation of the tool latching portion of the bolt main body. A tension adjusting device characterized by that.   The tension adjusting device according to claim 1, wherein outer diameters of the tool hooking portion and the pair of female screw members are substantially the same.   Bolt bodies each having a right thread portion and a left thread portion on one end side and the other end side of a hook-shaped tool hook portion in which a plurality of grooves are formed on the circumferential surface at substantially equal intervals along the axial direction; The female screw member includes one female screw member and the other female screw member that are respectively engaged with the right screw portion and the left screw portion of the bolt main body, and the pair of female screw members are brought close to or separated from each other by rotation of the tool latching portion of the bolt main body. A brace comprising: a tension adjusting device; and a brace body attached to at least one female screw member of the tension adjusting device.   A cylindrical member divided in the axial direction is placed so as to straddle between a pair of female screw members of the tension adjusting device, and a grouting material is filled into a gap portion from an opening of the cylindrical member. Item 4. The brace according to item 3.

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