JP5826725B2 - Mooring structure for strings - Google Patents

Description

  The present invention is used when arranging a chord material such as a tension rod in order to improve the rigidity of a wooden girder, and relates to an anchoring structure for a chord material at the end of the girder.

  Although wood is widely used as a building material, it has been rarely used as a skeleton of large-scale buildings for reasons of strength. However, in recent years, with the improvement of laminated lumber manufacturing technology, it has become possible to easily obtain wood with a large cross section and stable mechanical properties, and large-scale buildings using this have also started. However, the laminated wood with a large cross section is bulky and consumes a lot of resources. Therefore, a relatively small cross section of wood may be assembled into a truss structure to ensure both strength and light weight.

  The following patent document 1 is mentioned as an example of the technique which improves the intensity | strength of wood. In this document, a reinforcing structure for a beam is disclosed. The beam is composed of a beam chord material and a tension member, and the beam chord material is a bar having a rectangular cross section. On the other hand, the upholstery material is arranged in a trapezoidal shape so as to reinforce the beam string material, both ends thereof are fixed to the string material, and a certain distance from the beam string material is secured in the middle part by the vertical bundle material. The beam string material, the tension material, and the vertical bundle material have a truss structure, and both ends of the beam string material are attracted by the tension material to give the beam string material a camber.

  Moreover, in the following Patent Document 2, a cover lid is disclosed that extends over a water tank or a water channel. This cover is characterized in that it can be elongated while reducing weight and cost, and comprises an arch chord material straddling a water tank etc., a face plate disposed under the arch chord material, and an arch chord material and a face plate. And a hanging member to be tied. The both ends of the arch chord material are fixed to the face plate, and a plurality of suspension members are arranged at a certain interval. Thus, by suspending the face plate with the arch chord material, the strength required for the face plate is relaxed, and the weight and cost of the cover are reduced.

  In order to improve the rigidity of a girder used in a wooden building or the like, a string member such as a tension rod may be arranged on the girder as shown in FIG. In this figure, the support rods are provided in two places on the lower surface of the girder, and the tension rods connecting the both ends of the girder are arranged in a trapezoidal shape near the tip of the column, and the tension rod tension is adjusted. Therefore, it is possible to improve the rigidity by giving a camber to the girder. The tension rod is divided into four sections with the support as a boundary, and a turnbuckle for adjusting the tension is incorporated in the center of each section. Each element such as a tension rod is symmetrically arranged.

  In FIG. 9, a water-drop clevis (joint) is integrated with the end of each tension rod. In addition, buried shafts using lag screws are embedded at both ends of the girders to moor the tension rods. A bifurcated connector is attached to the lower end surface of the buried shaft via a fixing bolt, and a pin is inserted into the connector to hold the clevis of the tension rod. When the camber is applied to the girders, the turnbuckle is operated to apply a large tension to the tension rod. Therefore, it is preferable that the buried shaft and the tension rod that are opposed to each other with the coupling tool interposed therebetween are aligned, and the intersection angle between the buried shaft and the lower surface of the girder is also reduced.

JP 2001-342710 A JP 2002-88893 A

  As shown in FIG. 9, it is preferable that the buried shaft and the tension rod that are opposed to each other with the coupler interposed therebetween are aligned in a straight line from the viewpoint of strength. Therefore, the hole for embedding the buried shaft has a small angle of intersection with the underside of the girder, and when the hole is machined, the tip of the drill becomes unstable, and an error is likely to occur in the position and diameter of the hole. Further, when the lag screw is screwed into the hole, the vicinity of the hole entrance is scraped off by the ridges, and the appearance and the like are deteriorated.

  Due to such problems, the buried shaft is often embedded in the direction perpendicular to the underside of the girder as much as possible as shown in FIG. 10, and as a result, the buried shaft and the tension rod facing each other with the coupling tool in between are aligned. Intersection occurs without being lined up. In this case, the tension acting on the tension rod generates an inward load that causes the buried shaft to lie sideways. In the worst case, the girder is torn and the buried shaft moves toward the center of the girder, There is a risk that the tension rod cannot be moored.

  The present invention was developed on the basis of such circumstances, and is used when arranging a string material such as a tension rod in order to improve the rigidity of a wooden girder, and the string is torn by the tension acting on the string material. It aims at providing the mooring structure of the string material which can prevent this.

  In order to improve the rigidity of the spar, the invention according to claim 1 for solving the above-mentioned problem is provided with a column projecting from an intermediate part of the column and both ends of the column via the vicinity of the tip of the column. A string-like mooring structure for tying the string material at a position where the string material is retained at the end portion of the spar and fixed to the end surface of the burying shaft and a rod-like burying shaft embedded in a main hole provided in the spar And a connecting tool for holding an end of the chord member, and the beam is provided with a sub-hole closer to the center when viewed from the main hole, and the connecting tool or the embedded portion is provided in the sub-hole. The anchoring structure of the chord material is characterized in that a constraining shaft that is in contact with the shaft and can press the buried shaft toward the end of the beam is embedded.

  The present invention relates to a mooring structure for a string member at the end portion of the beam, and prevents the beam from being torn by a tension acting on the string member. A general girder is constructed on a pillar. However, the girder in the present invention means a simple bar, and there is no restriction in use, and it is not necessarily laid horizontally. However, the girders will be made of wood including laminated lumber. The string material is used to reinforce the girder and only needs to be able to transmit only tension, and a wire rope or tension rod is used. The tension rod is also called a tie rod, and is often used for reinforcing a prefabricated cabin.

  The strut is for arranging the chord material away from the girder, and extends so as to be orthogonal to the longitudinal direction of the girder. Moreover, the support | pillar is provided in the intermediate part except the edge part vicinity of a girder, The length, a number, a space | interval, etc. are free. However, since a compressive load derived from the tension of the chord material acts on the strut, a certain strength is required, and its root is fixed to the girder with a nail or the like. In addition, when providing several support | pillars in one girder, the direction is aligned.

  The string material connects both ends of the beam via the vicinity of the tip of the column. Therefore, when there is only one support column, the chord material is arranged in a triangular shape, and when there are a plurality of support columns, the chord material is arranged in a trapezoidal shape. When tension is applied to all the string members, cambers are given to the girders, and a simple truss structure is formed by the girders, the chord members, and the columns, and the rigidity of the girders is improved. In addition, when using a tension rod as a string material, it does not mean that both ends of the girder are connected by a single piece, but is divided at the post, and a turnbuckle is incorporated into each divided section to generate tension. .

  The buried shaft is a rod-like thing embedded in the girder, such as a lag screw, and the string material cannot be anchored by itself. Therefore, a coupling tool is interposed between the buried shaft and the chord material. The coupling tool is fixed to the buried shaft with a bolt or the like, and further has a function of mooring the end of the chord material. When a tension rod integrated with a clevis is used as a chord material, the connecting tool is often in a bifurcated shape sandwiching the clevis, and a pin penetrating the connecting tool and the clevis is often inserted.

  Thus, in order to improve the rigidity of a girder, the point which arrange | positions a chord material and a support | pillar and gives a camber to a girder is the same as the past. In addition, a rod-like buried shaft is embedded at the end of the girders for anchoring the chord material, and the point of receiving the tension acting on the chord material and the point of interposing a connecting tool between the buried shaft and the chord material are also conventional. Is the same. However, in the present invention, in order to restrict the displacement of the buried shaft, a constraining shaft is embedded in the beam, which is different from the conventional one.

  The hole to be machined into the girder for embedding the buried axis should be as large as possible with the girder surface in consideration of workability. For this reason, the buried shaft is not aligned with the chord material to be moored. As described above, the tension acting on the chord material generates an inward load that causes the buried shaft to lie down and pulls the girder. Try to tear. The restraining shaft is for preventing this, and receives the inward load acting on the buried shaft.

  The constraining shaft is rod-shaped, embedded near the center of the girder as seen from the burying shaft, and the inward load is received by both the burying shaft and the constraining shaft by contacting the constraining shaft with the burying shaft or the coupling tool. . Therefore, the stress around the buried shaft is relaxed and the girder can be prevented from being torn.

  In order to improve the rigidity of the girder, the invention according to claim 2 is a string member mooring structure in which a strut protruding from the middle part of the girder is provided and the both ends of the girder are connected via the vicinity of the front end of the strut. The string material is held at the end portion of the spar by a rod-like buried shaft embedded in a main hole provided in the spar, and an end portion of the string material fixed to the end surface of the buried shaft. A connector that holds the tail, and the connector includes a tail-shaped portion that comes into contact with the beam at a position closer to the center when viewed from the buried shaft. It is the mooring structure of the string material characterized by being attached to.

  This invention relates to the anchor structure of the string member at the end of the girder, as in the first aspect of the invention, the point of embedding the buried shaft in the girder, and the point of interposing the coupling between the buried shaft and the string member There is no change. However, in the present invention, a tail-shaped portion is provided in the connector, the tail-shaped portion is brought into contact with the girder, and the tail-shaped portion is further attached to the girder by a fixing means, which is disclosed in the invention according to claim 1. A constraining axis is not required.

  The tail portion is a portion that projects like a tail from the outer edge of the connector and contacts the girders, and faces the center of the girders when viewed from the buried shaft. Further, the tail portion is attached to the beam by some fixing means. The fixing means controls the displacement between the girder and the tail portion and plays a role to counter the inward load acting on the buried shaft. As a specific example of the fixing means, a method of processing a groove or a hole on the surface of a girder and fitting a tail portion into the nail, a bolt or a coach screw may be used.

  As in the first aspect of the invention, in the structure in which the chord material is moored at the end of the girder via the buried shaft and the coupling tool, the constraint shaft is embedded adjacent to the buried shaft, and the constraint shaft is used as the buried shaft or the coupling tool. By making contact, the constraining shaft opposes an inward load that causes the buried shaft to lie sideways. Therefore, the string can be securely moored by preventing the girder from being torn by the buried shaft. In addition, since the constraining shaft opposes the inward load, the intersection angle between the buried shaft and the spar surface can be increased, and the work is facilitated when the hole for embedding the buried shaft is machined into the spar.

  As in the invention described in claim 2, the coupling tool is provided with a tail-shaped portion that comes into contact with the beam, and the coupling tool acts on the buried shaft by attaching the tail-shaped portion to the beam with some fixing means. It can resist inward loads. Therefore, the same effect as that of the first aspect of the invention can be obtained without using a constraining shaft.

It is the side view and perspective view which show the mooring structure of the string material by this invention. In the lower perspective view, each element is drawn separately. It is the perspective view and longitudinal cross-sectional view of the state which assembled each element drawn below FIG. It is the side view and perspective view which show the mooring structure of the string material using the coupling tool which has a strip | belt-shaped piece. In the lower perspective view, each element is drawn separately. FIG. 4 is a perspective view and a longitudinal sectional view showing a state in which each element drawn below FIG. 3 is assembled. It is the side view and perspective view which show the mooring structure of the chord material which can oppose an inward load, without using a restraint axis | shaft. In the lower perspective view, each element is drawn separately. It is the perspective view and longitudinal cross-sectional view of the state which assembled each element drawn below FIG. It is a perspective view which shows the structure which used the deformed steel bar as the constraining shaft with the shaft as the buried shaft. It is a perspective view which shows the structure which doubled the chord material. It is a side view and perspective view which show the prior art at the time of arranging a chord material in a girder, and an embedded shaft and a chord material are arranged in a straight line at the end of the girder. In the side view and perspective view showing the prior art when placing the chord material on the girder, the crossing angle between the buried shaft and the lower surface of the girder is increased at the end of the girder, so that the buried shaft and the chord material are shaped like a Are lined up.

  FIG. 1 is a side view and a perspective view showing a mooring structure of a string member 20 according to the present invention. In the lower perspective view, each element is drawn separately. The girder 10 is a simple bar having a rectangular cross section, and the rigidity of the girder 10 is improved by disposing the chord material 20 below the bar. And in order to arrange the string material 20 in a trapezoidal shape, support columns 15 are provided at two places on the lower surface of the girder 10. Since the column 15 mainly receives a compressive load, the column 15 protrudes perpendicularly to the lower surface of the beam 10 and is fixed to the beam 10 with a nail or the like. In the present invention, it is assumed that the girder 10 is made of wood containing laminated timber, but its cross-sectional shape and length are arbitrary.

  The string member 20 is a tension rod that is widely used in the construction field, and a water droplet-shaped clevis 28 is integrated at an end thereof. In addition, the string member 20 is connected to both ends of the beam 10 through the vicinity of the tips of the two support columns 15, but is not connected to one by one, and is divided into three sections with the support column 15 as a boundary. The turnbuckle 23 for adjusting tension is incorporated in the center of each section. The string material 20 is moored at the end of the beam 10 by the buried shaft 31 and the connecting tool 51, and the chord material 20 is moored by the fastener 25 near the tip of the column 15. The fastener 25 has a bifurcated shape and is disposed back to back on the side surface near the tip of the column 15.

  When the tension is adjusted by the turnbuckle 23 after the chord members 20 are arranged in all the sections, both ends of the girder 10 are drawn downward, and a camber is given to the girder 10. Furthermore, the string member 20 and the support column 15 function like a truss structure, and the rigidity of the girder 10 is improved. Therefore, the girder 10 can be lengthened and can be used for a large-scale building.

  At the end of the beam 10, the chord material 20 is moored by the buried shaft 31 and the connector 51. The buried shaft 31 is a diversion of a general lag screw, and spiral ridges 35 protrude from the side peripheral surface thereof. Further, the lower end surface is a hexagonal portion 37 for hanging a tool, and a screw hole 36 is formed at the center of the hexagonal portion 37. Next, the connector 51 is composed of two elements, a central body 52 and an arm 55, and the central body 52 comes into contact with the hexagonal portion 37 and is integrated with the buried shaft 31. It is arrange | positioned at both right and left sides, and connects the center body 52 and the clevis 28.

  The central body 52 is obtained by cutting a round bar with a certain thickness, and on the outer periphery thereof, two opposed planes are provided in consideration of contact with the buried shaft 31, and further, the two planes are penetrated. A medium hole 54 is formed. After the center body 52 is brought into contact with the hexagonal portion 37 and the inner hole 54 and the screw hole 36 are aligned concentrically, when the fixing bolt 39 is inserted from the inner hole 54 toward the screw hole 36, the center body 52 is inserted into the buried shaft 31. Fixed to. Note that the head of the fixing bolt 39 is also in contact with a plane provided on the outer periphery of the center body 52.

  A side shaft 53 for inserting the arm 55 protrudes from the center of both side surfaces of the central body 52. In order to prevent the arm 55 from coming off, a washer 56 and a pressing bolt 57 are incorporated on the outside thereof. A female screw is formed in the center of the side shaft 53 so that the pressing bolt 57 can be screwed, and the arm 55 can freely rotate even after the pressing bolt 57 is tightened. After the left and right arms 55 are attached to the central body 52, the clevis 28 is sandwiched therebetween, and the pin 58 is inserted so as to penetrate the clevis 28. The string material 20 is anchored to the buried shaft 31 via the connector 51.

  The restraint shaft 41 is embedded in the beam 10 along with the buried shaft 31, but is located closer to the center of the beam 10 than the buried shaft 31. Then, the restraining shaft 41 is brought into contact with the central body 52 to restrict the displacement shaft 31 from being displaced toward the center of the beam 10. The constraining shaft 41 is a diverted general lag screw, like the buried shaft 31, and has a spiral protrusion 45 projecting on its side peripheral surface, and a hexagonal portion 47 on one end surface. A screw hole 46 is formed.

  In the girder 10, a main hole 13 for embedding the buried shaft 31 and a sub hole 14 for embedding the restraint shaft 41 are processed in advance. The main hole 13 and the sub-hole 14 are arranged so that the letter “C” is turned upside down, and both axes intersect at the tip of the lower surface of the beam 10. Therefore, the lower end surface of the restraint shaft 41 is in contact with the outer periphery of the center body 52. Further, both the main hole 13 and the sub-hole 14 have a large angle of intersection with the lower surface of the beam 10 and work at the time of processing is easy. In this figure, the elements other than the girder 10 are symmetrically arranged.

  FIG. 2 shows a state in which the elements drawn below FIG. 1 are assembled. At the end of the beam 10, the string material 20 is moored by the buried shaft 31 via the connector 51 as shown in this figure. Further, the buried shaft 31 is embedded in the main hole 13 extending obliquely from the lower surface of the girder 10, and the ridge 35 is pierced into the girder 10 so that it can resist the pulling load. The lower part of the buried shaft 31 protrudes from the lower surface of the beam 10.

  A connector 51 is fixed to the lower end surface of the buried shaft 31. The connector 51 includes a central body 52 located in the center and arms 55 located on both side surfaces thereof, and the arm 55 can freely rotate with respect to the central body 52. However, the arm 55 cannot be detached from the center body 52 by the washer 56 and the pressing bolt 57. A clevis 28 is sandwiched between the left and right arms 55, and these are integrated by a pin 58. Therefore, when tension acts on the string member 20, the arm 55 and the string member 20 are aligned.

  The restraint shaft 41 is embedded closer to the center of the beam 10 than the buried shaft 31. However, the buried shaft 31 and the restraint shaft 41 are arranged so that the letter C is inverted upside down. The embedding amount of the buried shaft 31 and the constraining shaft 41 is adjusted so that the lower end surface of 41 is in contact with the outer periphery of the central body 52. The load for pushing the restraint shaft 41 is transmitted to the beam 10 through the ridges 45.

  The string material 20 has a small angle of intersection with the lower surface of the spar 10, whereas the main hole 13 for embedding the buried shaft 31 has a larger angle of intersection with the lower surface of the spar 10 in order to facilitate processing. Therefore, the buried shaft 31 and the chord member 20 that are opposed to each other with the connector 51 interposed therebetween have a predetermined intersection angle without being aligned. When tension is applied to the chord member 20 in this state, an inward load is generated on the buried shaft 31 in addition to the pulling-out load so as to lie itself down. However, this inward load is received by the restraining shaft 41, and the stress around the main hole 13 is relaxed. Therefore, it is possible to prevent the girder 10 from being torn by the buried shaft 31 and maintain the soundness of the girder 10.

  FIG. 3 shows a mooring structure of the chord member 20 using the connector 61 having the strip 63. As in FIG. 1, the buried shaft 31 and the restraint shaft 41 that use a lag screw are embedded in the beam 10, but the shape of the connector 61 is different. The connector 61 has a bifurcated shape in which left and right arms 65 are arranged in parallel, and a center hole 64 for inserting the fixing bolt 39 is provided at the center. A band-like piece 63 that bears contact with the restraint shaft 41 protrudes from the outer edge of the connector 61. The strip 63 is bent in consideration of the intersection angle between the buried shaft 31 and the constraining shaft 41. The arm 65 has an inverted triangular shape to reinforce the belt-like piece 63. The clevis 28 is sandwiched between the left and right arms 65, and a pin 58 is inserted so as to penetrate these arms.

  The constraining shaft 41 in this figure is not in direct contact with the strip-shaped piece 63, but the adjustment bolt 43 is inserted into the screw hole 46 of the constraining shaft 41 and the head of the adjustment bolt 43 is brought into contact with the strip-shaped piece 63. By using the adjustment bolt 43, the reaction force acting on the connector 61 can be freely adjusted, and the string material 20 can be moored more reliably. In order to prevent the adjustment bolt 43 from loosening, a nut 44 is incorporated in its shaft portion.

  FIG. 4 shows a state in which the elements drawn below FIG. 3 are assembled. The chord material 20 is moored by the buried shaft 31 via the connector 61, which is the same as in FIG. However, unlike the others, the connector 61 is provided with a strip 63 protruding toward the center of the beam 10, and an adjustment bolt 43 and a nut 44 are incorporated at the lower end of the restraint shaft 41. Then, the head of the adjustment bolt 43 is brought into contact with the belt-like piece 63 to counter the inward load. In this configuration, it is not necessary to strictly manage the embedding depth of the buried shaft 31 and the constraint shaft 41. Further, the reaction force received by the strip 63 can be adjusted by changing the screwing amount of the adjusting bolt 43.

  FIG. 5 shows a mooring structure of the chord member 20 that can resist an inward load without using the restraining shafts 41 and 42. In this figure, similarly to FIG. 3, the buried shaft 31 is buried in the girder 10, and the bifurcated connector 71 is attached to the lower end surface thereof. However, the constraining shafts 41 and 42 are not embedded in the girder 10, and a tail portion 73 is provided in the connector 71 as an alternative. The tail portion 73 protrudes toward the center of the beam 10, has its tip brought into contact with the beam 10, and is further integrated with the beam 10 by the fixing means 81, thereby having the same function as the restraining shafts 41 and 42. Demonstrate.

  The fixing means 81 in FIG. 5 is rod-shaped and uses a general coach screw. A disc-shaped flange 84 is provided in the middle of the fixing means 81, a ridge 85 is formed on one end side when viewed from the flange 84, and a hexagonal portion for hanging a tool is disposed on the other end side. A male screw 86 for screwing the nut 87 and the nut 82 is formed. A narrow hole 17 for embedding the fixing means 81 is processed on the lower surface of the girder 10, and the flange 84 is brought into close contact with the lower surface of the girder 10. Further, the tail portion 73 is provided with a large hole 72 into which the fixing means 81 is inserted.

  As in the case of FIG. 3, the connector 71 is provided with a medium hole 74 into which the fixing bolt 39 is inserted. The arm 75 has an inverted triangular shape to reinforce the tail-shaped portion 73. The clevis 28 is sandwiched between the left and right arms 75, and a pin 58 is inserted so as to pass through these arms.

  FIG. 6 shows a state in which the elements drawn below FIG. 5 are assembled. The buried shaft 31 is embedded in the girder 10, and the chord material 20 is moored via a connector 71 attached to the lower end surface thereof. The tail portion 73 extending from the connector 71 is in contact with the lower surface of the beam 10 and is further integrated with the beam 10 by the fixing means 81. The upper part of the fixing means 81 above the brim 84 is embedded in the narrow hole 17 of the girder 10, and the ridge 85 bites into the girder 10. On the other hand, below the brim 84, the tail part 73 is penetrated, and the nut 82 is screwed to the male screw 86 at the lower end. Thus, by integrating the girder 10 and the tail portion 73 with the fixing means 81, it is possible to counter the inward load acting on the buried shaft 31.

  FIG. 7 shows a configuration in which the shaft is the buried shaft 32 and the deformed steel bar is the restraining shaft 42. As the buried shaft and the constraining shaft, various rods can be used on the assumption that they have a predetermined strength. Therefore, as shown in this figure, the shaft can be used as the buried shaft 32 and the deformed steel bar can be used as the restraining shaft 42. The buried shaft 32 is a metal round bar, and after being buried in the main hole 13, the drift pin 18 is driven from the girder 10 and fixed. Therefore, a lateral hole 16 intersecting the main hole 13 is processed on the side surface of the beam 10, and a side hole 38 is formed on the side peripheral surface of the buried shaft 32.

  In addition, the constraining shaft 42 using a deformed steel bar has regular irregularities formed on the side peripheral surface, and is fixed to the auxiliary hole 14 with an adhesive. In addition, the connection tool 51 is exactly the same as that shown in FIG. 1, is composed of a central body 52 and an arm 55, and is attached to the buried shaft 32 via a fixing bolt 39. Since the buried shaft and the constraining shaft only need to be rod-shaped, contrary to this figure, a deformed steel bar can be used for the buried shaft and a shaft can be used for the constraining shaft.

  FIG. 8 shows a configuration in which the chord member 20 is double-tracked. The embedded shaft 31 and the constraining shaft 41 are embedded in the beam 10, the connecting tool 51 is attached to the embedding shaft 31, and the constraining shaft 41 is brought into contact with the connecting tool 51 as in FIG. 1. However, this connecting tool 51 is partly different from that shown in FIG. 1 and is composed of only the central body 52 and does not use the arm 55. Side shafts 53 protrude from both side surfaces of the central body 52. When the clevis 28 is inserted into each side shaft 53, the two string members 20 are arranged in parallel. A washer 56 and a pressing bolt 57 are attached to the end surface of the side shaft 53 to prevent the clevis 28 from coming off. By making the chord material 20 into a double track, the rigidity of the girder 10 can be further improved.

10 Girder 13 Main hole 14 Sub hole 15 Post 16 Side hole 17 Narrow hole 18 Drift pin 20 String material (Tension rod)
23 Turnbuckle 25 Fastener 28 Clevis 31 Buried shaft (lag screw)
32 Shaft
35 Projection 36 Screw hole 37 Hexagon part 38 Side hole 39 Fixing bolt 41 Restraint shaft (lag screw)
42 Restraint shaft (deformed bar steel)
43 Adjustment bolt 44 Nut 45 Projection 46 Screw hole 47 Hexagonal part 51 Connector 52 Central body 53 Side shaft 54 Middle hole 55 Arm 56 Washer 57 Press bolt 58 Pin 61 Connector 63 Band-shaped piece 64 Medium hole 65 Arm 71 Connector 72 Large hole 73 Tail-shaped part 74 Middle hole 75 Arm 81 Fixing means (coach screw)
82 Nut 84 Head 85 Projection 86 Male thread 87 Hexagon

Claims (2)

In order to improve the rigidity of the beam (10), a column (15) protruding from the middle part of the beam (10) is provided, and both ends of the beam (10) are passed through the vicinity of the tip of the column (15). It is a mooring structure of the tying material (20)
In the place where the string material (20) is fastened at the end of the beam (10),
A rod-like buried shaft (31, 32) embedded in a main hole (13) provided in the beam (10), and an end portion of the chord member (20) fixed to an end surface of the buried shaft (31, 32) A connector (51, 61) for holding
The girder (10) is provided with a sub-hole (14) closer to the center when viewed from the main hole (13). The sub-hole (14) has the connector (51, 61) or the buried shaft ( 31. A chord material (20) characterized in that a constraining shaft (41, 42) which is in contact with 31 and 32) and which can press the buried shaft (31, 32) toward the end of the beam (10) is embedded. ) Mooring structure. In order to improve the rigidity of the beam (10), a column (15) protruding from the middle part of the beam (10) is provided, and both ends of the beam (10) are passed through the vicinity of the tip of the column (15). It is a mooring structure of the tying material (20)
In the place where the string material (20) is fastened at the end of the beam (10),
A rod-like buried shaft (31, 32) embedded in a main hole (13) provided in the beam (10), and an end portion of the chord member (20) fixed to an end surface of the buried shaft (31, 32) A connector (71) for holding
The connector (71) includes a tail portion (73) that comes into contact with the beam (10) at a position closer to the center when viewed from the buried shaft (31, 32), and the tail portion (73) The anchoring structure of the string member (20), which is attached to the beam (10) by a fixing means (81).

Images