JP6329387B2 - Bracing attachment device - Google Patents

Description

  The present invention relates to a bracing attachment device in a ceiling foundation structure.

  In the ceiling base structure, the upper end of the suspension bolt is screwed onto the insert nut embedded in the ceiling, a hanger is attached to the lower end of the suspension bolt, the field receiver is supported on the hanger, and a clip is attached to the field receiver. A field edge is suspended and a ceiling material is attached to the field edge. In such a ceiling foundation structure, a brace is inserted between adjacent suspension bolts in order to prevent the ceiling material from being damaged and dropped when an earthquake occurs. Thus, as a conventional bracing attachment device, there is one described in Patent Document 1 below.

Utility Model Registration No. 3176767

  In the above-mentioned conventional bracing attachment device, the bracing attachment device described here, in particular the brace upper end fitting, has a large number of parts and a complicated structure, so that the production cost is high and the installation is troublesome. There is such a problem.

  SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a bracing attachment device that has a simple structure, has a small number of parts, and can be attached easily.

Means for solving the above problems will be described with reference numerals in the embodiments described later. As shown in FIG. 1, the invention according to claim 1 is the adjacent suspension bolts 1, 1 in the ceiling foundation structure. A brace 2 is inserted in between, and the upper end of the brace 2 is attached to the upper end of one suspension bolt 1 via the brace upper end fitting 3, and the lower end of the brace 2 is close to the lower end of the other suspension bolt 1. A bracing attachment device to be attached to a required portion of the field edge receiver U,
As shown in FIGS. 2 and 3, the brace upper end mounting bracket 3 projects a pair of parallel clamping pieces 6 and 6 from a base portion 5 having a female screw portion 4 (4 </ b> A) to be screwed into the suspension bolt 1. A second metal fitting 12 formed by projecting an insertion piece 9 inserted between the sandwiching pieces 6 and 6 from a trunk portion 8 having a screw hole portion 7 for screwing a screw shaft, A connecting shaft tool 10 that is pivotably connected through the sandwiching pieces 6 and 6 and the insertion piece 9 inserted therebetween, and one end of which is screwed into the screw hole 7 of the second metal fitting 12. A first metal fitting 11 in which an end portion is formed of a screw shaft 13 connected to an upper end portion of the brace 2 via a fixing tool 24 and a female screw portion 4 (4A) is screwed to an upper end portion of the suspension bolt 1 The insertion piece 9 of the second metal fitting 12 is inserted between the pieces 6 and 6, and both are connected by the connecting shaft tool 10. The other end portion of the screw shaft 13 is screwed to part, characterized in that as fixed by the fixture 24 by inserting the screw shaft insertion hole 17c of the mounting member 17 attached to the upper end of the brace 2.

  According to a second aspect of the present invention, in the brace attachment device according to the first aspect, the first metal fitting 11 bends a substantially rectangular metal plate M into a substantially U-shape as shown in FIG. A semi-circular female screw portion 4A is formed inside, and both bent plate portions are used as sandwiching pieces 6 and 6, and a bolt insertion hole 16 is formed through which a connecting bolt 10 as a connecting shaft is inserted. As shown in FIG. 6, the second metal fitting 12 is formed by bending a substantially rectangular metal plate in two to form a cylindrical main part 8 at the center side and overlapping both end sides. In addition, the insertion piece 9 is formed, the screw hole portion 7 for screwing the screw shaft is provided in the base portion 8, and the bolt insertion hole 21 corresponding to the bolt insertion hole 16 of the first metal fitting 11 is formed in the insertion piece 9. It is characterized by becoming.

  According to a third aspect of the present invention, in the bracing attachment according to the second aspect, as shown in FIG. 3, the second metal fitting is provided between the two holding pieces 6, 6 on the inner surface of each holding piece 6 of the first metal fitting 11. The ridge portion 19 is provided so as to hold a gap between the outer side surface of the insertion piece 9 and the inner side surface of the clamping piece 6 when the 12 insertion pieces 9 are inserted.

  According to a fourth aspect of the present invention, in the brace attachment device according to the second or third aspect, as shown in FIG. 3, the inner surface of each clamping piece 6 of the first metal fitting 11 has a semicircular shape inside the base portion 5. When the female screw part 4 is screwed into the male screw part of the suspension bolt 1, a protrusion 20 that abuts on the suspension bolt 1 is projected from the opposite side of the female screw part 4.

  According to a fifth aspect of the present invention, in the brace attachment device according to the second aspect, as shown in FIG. 8, the bolt insertion hole 16 of the clamping piece 6 in the first metal fitting 11 and the bolt insertion hole of the insertion piece 9 in the second metal fitting 12. The connecting bolt 10 inserted through the sleeve 21 is fitted with a sleeve 25 having a length n larger than the thickness t of the insertion piece 9 and smaller than the distance m between the sandwiching pieces 6 and 6.

  Claim 6 is the bracing attachment device according to any one of claims 2 to 5, as shown in FIG. 6, as a screw hole portion 7 for screwing the shaft portion 8 of the trunk portion 8 in the second metal fitting 12. The bottom plate portion 8a is formed by 7A, which is formed by drilling by burring and threading the hole.

  Claim 7 is a bracing attachment device according to any one of claims 2 to 5, as shown in FIG. 7, as a screw hole portion 7 for screwing the shaft portion 8 of the trunk portion 8 in the second metal fitting 12. It consists of the nut 7B attached to the 8 baseplate part 8a.

In the invention according to claim 8, as shown in FIG. 1, a brace 2 is inserted between adjacent suspension bolts 1 and 1 in the ceiling base structure, and the upper end of the brace 2 is brazed to the upper end of one suspension bolt 1. A brace attachment device that is attached via an upper end fitting 3, and that attaches the lower end of the brace 2 to a required portion of the field edge U near the lower end of the other suspension bolt 1,
As shown in FIG. 9, the brace upper end fitting 3 is formed by projecting a pair of parallel clamping pieces 6 and 6 from a base portion 5 having a female screw portion 4 (4 </ b> A) that is screwed into the suspension bolt 1. A first metal fitting 11; a second metal fitting 12 formed by projecting an insertion piece 9 inserted between the holding pieces 6 and 6 from a trunk portion 8 having a screw hole portion 7 for screwing a screw shaft; and the holding piece 6 and 6 and the connecting piece 10 that is inserted between them and is rotatably connected, one end is screwed into the screw hole 7 of the second metal fitting 12, and the other end is It comprises a screw shaft 13 connected to the upper end portion of the brace 2 via a fixing tool 24, and a clamping piece 6 of the first metal fitting 11 in which the female screw portion 4 (4 A) is screwed to the upper end portion of the suspension bolt 1. 6, the insertion piece 9 of the second metal fitting 12 is inserted and connected with a connecting shaft 10, and one end is screwed into the screw hole 7 of the second metal fitting 12. The other end portion of the screw shaft 13 is inserted into the horizontal plate portion 28a of the L-shaped plate-shaped mounting bracket 28 and fixed by the fixture 24, and the vertical plate portion 28b of the plate-shaped mounting bracket 28 is a brace made of a channel material. It is characterized by being fixed to the upper end portion of 2 with a tapping screw 32.

  In a ninth aspect of the present invention, in the brace attachment apparatus according to the first or eighth aspect, the first metal fitting 11 and the second metal fitting 12 are each formed by die casting, and the female screw portion 4 of the first metal fitting 11 is threaded into the base portion 5. It consists of the formed female screw hole 4B.

  According to a tenth aspect of the present invention, in the brace attachment device according to the ninth aspect, the female screw hole 4B of the first metal fitting 11 is formed only on the upper end side in the axial direction, and the lower end side in the axial direction is threaded. It is characterized by being formed in the fool hole 4C.

  An eleventh aspect of the present invention is the brace attachment device according to the ninth or tenth aspect, wherein the connecting shaft tool 10 for connecting the first metal fitting 11 and the second metal fitting 12 comprises a connecting rivet 10A.

  The effect of the invention by the above means will be described with reference numerals in the embodiments described later. According to the invention according to claim 1, the brace upper end fitting 3 has the female screw part 4 (4A). A first metal fitting 11 formed by projecting sandwiching pieces 6 and 6 from the base 5, and an insertion piece 9 inserted between the sandwiching pieces 6 and 6 projecting from a trunk portion 8 having a screw hole 7. A connecting shaft 10 that pivotably connects the two metal fittings 12, the sandwiching pieces 6, 6 and the insertion piece 9 inserted therebetween, and one end screwed into the screw hole 7 of the second metal fitting 12. The other end portion is composed of a screw shaft 13 connected to the upper end portion of the brace 2 via a fixing tool 24, and a female screw portion 4 (4A) is screwed to the upper end portion of the suspension bolt 1. The insertion piece 9 of the second metal fitting 12 is inserted between the holding pieces 6 and 6 of the one metal fitting 11 and connected by the connecting shaft tool 10, and the screw hole The other end portion of the screw shaft 13 with one end screwed into the screw 7 is inserted into the screw shaft insertion hole 17c of the attachment member 17 attached to the upper end portion of the brace 2 and is fixed by the fixture 24, so that the structure is simple. In addition, despite the small size and the small number of parts, the bracing operation can be performed easily and easily. And since the insertion piece 9 of the 2nd metal fitting 12 is connected with respect to the clamping pieces 6 and 6 of the 1st metal fitting 11 so that rotation is possible, the inclination angle of the brace 2 with respect to the suspension bolt 1 can be changed and adjusted suitably. it can.

  According to the second aspect of the present invention, the first metal fitting 11 is formed by bending the metal plate M into a substantially U shape to form the semicircular female screw portion 4 (4A) inside the base portion 5. The plate part is composed of sandwiching pieces 6 and 6, and a bolt insertion hole 16 is formed in this. The second metal fitting 12 is formed by bending the metal plate in two to form a cylindrical base part 8 on the center side. The insert piece 9 is formed by superimposing both end portions, the screw hole portion 7 for screwing the screw shaft is provided in the trunk portion 8, and the bolt insertion hole 21 is formed in the insert piece 9. Since the 1st metal fitting 11 and the 2nd metal fitting 12 can each be formed easily by processing, manufacturing cost can be made cheap.

  According to the third aspect of the present invention, when the insertion piece 9 of the second metal fitting 12 is inserted between the holding pieces 6 and 6 on the inner surface of each holding piece 6 of the first metal fitting 11, Since the protruding portion 19 is provided to hold the gap between the side surface and the inner surface of the holding piece 6, the holding piece can be held even if the tightening nut 14 screwed into the connecting bolt 10 is strongly tightened. The degree of tightening can be confirmed without causing 6 to be deformed inconveniently.

  According to the fourth aspect of the present invention, the inner circumferential surface of each clamping piece 6 of the first metal fitting 11 is provided on the inner surface of the first metal piece 11 from the opposite side of the female screw portion 4 when the semicircular female screw portion 4 is screwed to the suspension bolt 1. Since the protrusion 20 that abuts the suspension bolt 1 protrudes, the female screw portion 4 and the protrusion 20 can catch the entire circumference of the suspension bolt 1, so that the first metal fitting 11 is connected to the upper end of the suspension bolt 1. It can be fixed accurately without rattling.

  According to the fifth aspect of the present invention, the connecting bolt 10 inserted through the bolt insertion hole 16 of the clamping piece 6 in the first metal fitting 11 and the bolt insertion hole 21 of the insertion piece 9 in the second metal fitting 12 is inserted into the connection bolt 10. Since the sleeve 25 having a length n larger than the thickness t of the piece 9 and smaller than the distance m between the both sandwiching pieces 6 and 6 is fitted, the nut 14 for tightening is tightened so that the both sandwiching pieces 6 and 6 are By press-contacting both end faces of the sleeve 25, the backlash in the left-right direction of the first metal fitting 11 can be eliminated, and the second metal fitting 12 can be freely rotated around the sleeve 25, thereby freeing the bracing 2 It can be installed at various inclination angles.

  As in the invention according to claim 6, as the screw hole portion 7 for screwing the shaft 8 of the trunk portion 8 in the second metal fitting 12, the bottom plate portion 8 a of the trunk portion 8 is drilled by burring and a screw is cut into the hole. If the rod 7A is employed, the processing of the screw hole 7 is easy, and the manufacturing cost of the second metal fitting 12 is reduced.

  As in the invention according to claim 7, if the screw hole portion 7 for screwing the shaft portion 8 of the trunk portion 8 in the second metal fitting 12 is formed of a nut 7 </ b> B attached to the bottom plate portion 8 a of the trunk portion 8, The strength as the hole 7 is large, and the durability is excellent.

According to the eighth aspect of the present invention, the brace upper end mounting bracket 3 includes the first bracket 11 formed by projecting the clamping pieces 6 and 6 from the base portion 5 having the female screw portion 4 (4A), and the screw hole portion. 7 through the second metal fitting 12 formed by projecting an insertion piece 9 inserted between the sandwiching pieces 6 and 6 from the basic part 8 having 7 and the sandwiching pieces 6 and 6 and the insertion piece 9 inserted therebetween. A connecting shaft 10 that is rotatably connected, and a screw shaft in which one end is screwed into the screw hole 7 of the second metal fitting 12 and the other end is connected to the upper end of the brace 2 via a fixture 24. The insertion piece 9 of the second metal fitting 12 is inserted between the sandwiching pieces 6 and 6 of the first metal fitting 11 in which the female screw portion 4 (4A) is screwed to the upper end portion of the suspension bolt 1. The other end portion of the screw shaft 13 which is connected by the connecting shaft tool 10 and screwed in one end portion into the screw hole portion 7 is connected to the horizontal plate portion 2 of the L-shaped plate-shaped mounting bracket 28. Since the vertical plate portion 28b of the plate-like mounting bracket 28 is fixed to the upper end portion of the brace 2 made of channel material with the tapping screw 32, the structure is simple and compact. Even though the number of parts is small, the bracing operation can be performed easily and easily. And since the insertion piece 9 of the 2nd metal fitting 12 is connected with respect to the clamping pieces 6 and 6 of the 1st metal fitting 11 so that rotation is possible, the inclination angle of the brace 2 with respect to the suspension bolt 1 can be changed and adjusted suitably. it can.
In particular, according to the present invention, since a commercially available channel material can be used as the brace 2, it can be manufactured at low cost.

  As in the invention according to claim 9, when the first metal fitting 11 and the second metal fitting 12 are each formed by die casting, and the female screw portion 4 of the first metal fitting 11 is formed in the base portion 5, It is suitable for mass production, and the production cost can be reduced.

  When the female screw portion 4 of the first metal fitting 11 is formed into the female screw hole 4B formed by threading the base portion 5 as in the invention according to claim 10, the female screw hole 4B may have a screw hole in the entire region in the base axial direction. However, as shown in FIG. 10 (b), only three to four female screw holes 4B are formed on the upper end side (right side in the figure), and the lower end part (left side in the figure) is threaded. It is preferable to make the hole 4C (straight hole) without doing so. Accordingly, when the suspension bolt 1 (see FIG. 1) is screwed into the female screw portion 4 from the lower side, the lower end portion of the female screw portion 4 is formed in the fool hole 4C, so that the suspension bolt 1 is quickly inserted straight. Since the screw reaches the female screw hole 4B and is screwed in, the suspension bolt 1 can be quickly screwed into the female screw part 4 and the workability is good.

  As in the invention according to claim 11, the rivet 10 </ b> A is inserted into the rivet insertion holes 34 </ b> A, 35 </ b> A, 36 </ b> A by adopting the connection rivet 10 </ b> A as the shaft member 10 for connecting the first metal member 11 and the second metal member 12. Then, the first metal fitting 11 and the second metal fitting 12 can be rotatably connected by a one-touch operation in which the insertion end is crimped and the locking piece a is bulged. For this reason, the workability is extremely good as compared with the screwing work of the connecting bolt of the embodiment.

It is a front view of the state which put the bracing between the suspending bolts which adjoin each other of the suspending bolt suspended from the ceiling part. FIG. 2 is an enlarged front view of a portion indicated by an arrow A in FIG. 1, showing an embodiment of a brace upper end fitting. FIG. 3 is a sectional view taken along line XX in FIG. 2. It is an expansion perspective view of the part shown by the arrow B of FIG. (a) is a plan view showing a developed state of the metal plate forming the first metal fitting of the brace upper end fitting shown in FIG. 2, and (b) is a front view of the first metal fitting formed by bending the metal plate. is there. (a) is a front view of a 2nd metal fitting, (b) is a side view. (a) is a front view of another embodiment of the second metal fitting, and (b) is a side view. It is a partial cross section front view of other embodiment of a brace upper end part attachment metal fitting. It is explanatory drawing which shows the attachment state of the bracing which consists of channel materials. (a) is a front view showing the brace upper end mounting bracket and the brace upper end where the first bracket and the second bracket are formed by die casting, (b) is a side view, and (c) is an exploded perspective view. (a) is a front view showing another embodiment of the bracing in which the first metal fitting and the second metal fitting are formed by die casting, and (b) is a side view.

  A preferred embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, an upper end portion of a suspension bolt 1 is screwed to an insert nut T embedded in a ceiling portion S, and a lower end portion of the suspension bolt 1 is shown. A hanger H is attached to the hanger H, a field edge U is supported on the hanger H, a field edge N is suspended from the field edge receiver U via a clip (not shown), and a ceiling material C is attached to the field edge N. The ceiling base structure to be attached is shown, and the brace 2 is inserted between the adjacent suspension bolts 1 and 1 in the ceiling base structure, and the upper end of the brace 2 is connected to the upper end of one of the adjacent suspension bolts 1 A state is shown in which the lower end portion of the brace 2 is attached to a required portion of the field receiver U near the lower end portion of the other suspension bolt 1 by being attached via the attachment fitting 3.

  In the embodiment shown in FIGS. 1 to 4, the brace 2 is made of a metal square pipe (a rectangular tube), and attachment members 17 are attached to the upper and lower ends, respectively. Each mounting member 17 is a U-shaped bracket made up of a horizontal plate portion 17a and both vertical plate portions 17b and 17b. The vertical plate portions 17b and 17b are fitted with screws 18 by being fitted to the upper and lower ends of the brace 2. It is attached by fixing. The horizontal plate part 17a is provided with a screw shaft (bolt) insertion hole 17c.

  As shown in FIGS. 2 and 3, the brace upper end mounting bracket 3 is a plane formed by projecting a pair of parallel clamping pieces 6 and 6 from a base portion 5 having a female screw portion 4 screwed into the suspension bolt 1. A second metal fitting formed by projecting an insertion piece 9 to be inserted between the sandwiching pieces 6 and 6 from a main part 8 having a first metal fitting 11 having a substantially U-shape and a screw hole portion 7 for screwing a screw shaft. 12, a coupling bolt 10 and a fastening nut 14 which are pivotal couplings through which the pair of sandwiching pieces 6 and 6 and the insertion piece 9 inserted therebetween are rotatably coupled, and one end The screw shaft portion 7 is screwed into the screw hole portion 7 of the second metal fitting, and the other end portion is constituted by a screw shaft 13 connected to the upper end portion of the brace 2 via nuts 24 and 24 serving as fixtures. In the embodiment shown in FIG. 3, the screw hole portion 7 for screwing the trunk portion 8 of the trunk portion 8 in the second metal fitting 12 is drilled in the bottom plate portion 8 a of the trunk portion 8 by burring and screwed into the hole. 7A.

  The first metal fitting 11 and the second metal fitting 12 of the brace upper end fitting 3 shown in FIGS. 2 and 3 are formed by pressing a metal plate, respectively. FIG. The metal plate M which forms 11 is shown in a developed state, and (b) shows a front view of the first metal fitting 11 formed by bending the metal plate M into a substantially U shape. As shown in FIGS. 5A and 5B, the first metal fitting 11 bends a substantially rectangular metal plate M into a substantially U shape, and forms a female screw portion 4 inside the bent base portion 5. Are formed, and both bent plate portions are used as sandwiching pieces 6 and 6, and bolt insertion holes 16 through which the connecting bolts 10 are inserted are formed in the sandwiching pieces 6.

  Further, as shown in FIGS. 5A and 5B, the insertion piece 9 of the second metal fitting 12 is inserted between the holding pieces 6 and 6 on the inner surface of each holding piece 6 in the first metal fitting 11. A protruding portion 19 is sometimes provided so as to hold a gap between the outer surface of the insertion piece 9 and the inner side surface of the holding piece 6, and the inner side surface of each holding piece 6 has a half circumference inside the base portion 5. A plurality of protrusions 20 protrude from the opposite side of the semicircular female screw portion 4 to the male screw portion of the suspension bolt 1 when the female screw portion 4 is screwed into the male screw portion of the suspension bolt 1 (see FIG. 3). It is installed. The protrusions 19 and the protrusions 20 are formed so as to protrude to the inner surface side of the metal plate M by hitting a required portion on the outer surface side of the metal plate M for press working described later with a tool such as a punch.

  (A), (b) of FIG. 6 is the front view and side view of the 2nd metal fitting 12 of the bracing upper end part attachment metal fitting 3 shown in FIG.2 and FIG.3. Although the illustration of the metal plate to be pressed is omitted for the second metal fitting 12, a substantially rectangular metal plate is bent into two in the same manner as the first metal fitting 11, and the center of FIG. b) forming a pentagonal cylindrical base portion 8 as shown in FIG. 5A, forming an insertion piece 9 by superimposing both ends, and providing a screw hole portion 7 for screwing the screw shaft in the base portion 8; The bolt insertion hole 21 corresponding to the bolt insertion hole 16 of the first metal fitting 11 is formed on the clamping piece 6 side. The screw hole portion 7 for screwing the screw shaft of the trunk portion 8 is made of 7A in which a bottom plate portion 8a of the trunk portion 8 is drilled by burring and a screw is cut into the hole. When the screw hole portion 7 made of 7A is provided, the screw hole portion 7 can be easily processed, and the manufacturing cost of the second metal fitting 12 can be reduced.

  (A), (b) of FIG. 7 is the front view and side view of the 2nd metal fitting 12 which have the screw hole part 7 for screw-screw screwing of another form. In the second metal fitting 12, the screw hole portion 7 for screwing the screw shaft provided in the trunk portion 8 is composed of a nut 7 </ b> B attached to the bottom plate portion 8 a side of the trunk portion 8. In this case, the bottom plate portion 8a is provided with a bolt insertion hole 8o. When the screw hole portion 7 is made of such a nut 7B, the strength as the screw hole portion 7 is large and the durability is excellent. 7 (a) and 7 (b), reference numeral 22 denotes a protrusion projecting from a required portion on the outer surface of the trunk portion 8 with a punch or the like, and reference numeral 23 denotes a projection of the bottom plate portion 8a of the trunk portion 8. The nut 7 </ b> B can be held and fixed at a required position in the trunk portion 8 by the protrusion 22 and the cut-and-raised piece 23, which are formed by cutting and raising the required portion.

  The installation of the brace 2 by the brace attachment device configured as described above will be described. First, when the upper end of the brace 2 is attached to the upper end of the suspension bolt 1 by the brace upper end fitting 3, the substantially U-shape. The insertion piece 9 of the second metal fitting 12 is inserted in a state in which the semicircular female screw portion 4A on the back surface side of the base portion 5 of the first metal fitting 11 formed on the upper end of one suspension bolt 1 is screwed. The nut 10 is inserted between the clamping pieces 6 and 6 of the first metal fitting 11, and the connecting bolt 10 is inserted into the bolt insertion holes 16 and 21 of the clamping piece 6 and the insertion piece 9. At this time, the nut 14 is tightened loosely. Then, the other end of the screw shaft 13 with one end screwed into the screw hole 7 (7A) of the second metal fitting 12 is inserted into the screw shaft insertion hole 17c of the attachment member 17 at the upper end of the brace 2. Fix with a pair of nuts 24,24.

  Then, after appropriately adjusting the attachment angle of the brace 2 to the suspension bolt 1, the second nut 12 is attached to the first bracket 11 by strongly tightening the tightening nut 14 screwed into the connecting bolt 10. Secure and install as shown in FIGS.

  Further, the lower end of the brace 2 is attached to a required portion of the field receiver U near the lower end of the other suspension bolt 1. When attaching the lower end of the brace 2, as shown in FIG. 4, one end of the mounting bolt 26 is attached to the inner and outer pair of nuts 27, 27 (only the outer nut 27 only) on the attachment member 17 at the lower end of the brace 2. The other end portion is inserted into the horizontal plate portion 28a of the L-shaped plate-shaped mounting bracket 28 and fixed with a pair of nuts 29, 29. The vertical plate portion 28b of the plate-shaped mounting bracket 28 is connected to the field plate 28b. A tapping screw 30 is driven into the edge receiver U and fixed. Further, the plate-like mounting bracket 28 is provided with a plurality of large and small screw insertion holes 31a and 31b, and the screws 30 can be fixed by the required screw insertion holes 31a and 31b. By using such a plate-like mounting bracket 28, the lower end portion of the brace 2 made of a rectangular tube can be easily adjusted and securely attached to the field receiver U according to the inclination angle. it can.

  The brace upper end fitting 3 described above includes a first fitting 11 in which sandwiching pieces 6, 6 are projected from a base 5 provided with a semicircular female screw portion 4 </ b> A that is screwed into the suspension bolt 1, and a trunk 8. Through the second metal piece 12 projecting an insertion piece 9 inserted between the sandwiching pieces 6 and 6, and the sandwiching pieces 6 and 6 and the insertion piece 9 inserted therebetween are rotatably connected. A connecting bolt 10 and a screw shaft 13 having one end screwed into the screw hole 7 of the second metal fitting 12 and the other end connected to the upper end of the brace 2 via nuts 24, 24. Then, the insertion piece 9 of the second metal fitting 12 is inserted between the sandwiching pieces 6 and 6 of the first metal fitting 11 in which the female screw portion 4 is screwed to the upper end portion of the suspension bolt 1 and connected by the connecting bolt 10. The attachment which attached the other end part of the screw shaft 13 screwed in the screw hole part 7 of the second metal fitting 12 to the upper end part of the brace 2 Since it only has to be inserted into the screw shaft insertion hole 17c of the material 17 and fixed with the nut 24, the structure is simple and compact, and the attachment work of the brace 2 can be easily performed despite the small number of parts. .

  And since the insertion piece 9 of the 2nd metal fitting 12 is connected with respect to the clamping pieces 6 and 6 of the 1st metal fitting 11 so that rotation is possible, changing and adjusting the inclination angle of the brace 2 with respect to the suspension bolt 1 suitably. Can do.

  Further, as shown in FIG. 3 and FIG. 5 (b), the insertion piece 9 of the second metal fitting 12 is inserted between the both holding pieces 6, 6 on the inner surface of each holding piece 6 of the first metal fitting 11. Since a protrusion 19 is sometimes provided so as to hold a gap between the outer surface of the insertion piece 9 and the inner surface of the holding piece 6, a tightening nut 14 screwed into the connecting bolt 10 is provided. Even if it is strongly tightened, the clamping piece 6 will not be deformed inconveniently and the degree of tightening can be confirmed.

  Further, as shown in FIG. 3 and FIG. 5 (b), on the inner surface of each clamping piece 6 of the first metal fitting 11, an internal thread portion 4 inside the base portion 5 is screwed onto the external thread portion of the suspension bolt 1. Since the projections 20 that contact the suspension bolt 1 from the opposite side of the female screw portion 4 when projecting are projected, the female screw portion 4 and the projection 20 can catch the entire circumference of the suspension bolt 1, and therefore The metal fitting 11 can be accurately fixed without rattling at the upper end of the suspension bolt 1.

   FIG. 8 is a partial cross-sectional front view of another embodiment of the brace upper end fitting 3. In the brace upper end mounting bracket 3, the connecting bolt 10 inserted through the bolt insertion hole 16 of the clamping piece 6 in the first metal fitting 11 and the bolt insertion hole 21 of the insertion piece 9 in the second metal fitting 12 has an insertion piece. A feature is that a sleeve 25 having a length n larger than a thickness t of 9 and smaller than a distance m between both sandwiching pieces 6 and 6 is fitted as shown in the figure. In this way, the nut 14 for tightening is tightened so that both the clamping pieces 6 and 6 are pressed against both end surfaces of the sleeve 25, thereby eliminating the backlash in the left-right direction of the first metal fitting 11, and The two metal fittings 12 can be freely rotated around the sleeve 25, whereby the brace 2 can be attached to a free inclination angle.

  In the embodiment shown in FIG. 2 to FIG. 4, a square pipe (rectangular tubular body) is used as the brace 2, but FIG. 9 shows an embodiment in which a channel material is used as the brace 2. In this case, the screw shaft 13 of the brace upper end fitting 3 is attached to the upper end of the brace 2 made of a channel material via an L-shaped plate fitting 28 as shown in FIG. That is, the other end portion of the screw shaft 13 whose one end portion is screwed and fixed into the screw hole portion 7 (7A) of the second metal fitting 12 is inserted into the horizontal plate portion 28a of the L-shaped plate-like attachment metal fitting 28 to be paired. The vertical plate portion 28b of the plate-like mounting bracket 28 is fixed to the upper end portion of the brace 2 made of a channel material with a tapping screw 32. And the lower end part of this brace 2 should just be fixed to the required location of the field edge receiving U with the tapping screw 32 similarly. Particularly in this embodiment, since a commercially available channel material can be used as the brace 2, a practical effect that it can be manufactured at low cost can be exhibited.

  The brace upper end mounting bracket 3 according to the embodiment described above is formed by pressing the first bracket 11 and the second bracket 12 by pressing a metal plate, respectively. The embodiment in which the metal fittings 12 are formed by die casting is shown. That is, the first metal fitting 11 of the brace upper end fitting 3 shown in FIGS. 10A to 10C includes a substantially hollow cylindrical base 5 and a pair of sandwiching pieces 6 and 6 extending in parallel from the base 5. Are integrally formed by die casting, and a female screw is cut into the inner peripheral surface of the hollow cylindrical base portion 5 to form a screw hole, and this female screw hole 4B is used as a female screw portion 4. The female screw portion 4 may have a screw hole in the entire region in the base axial direction. However, as shown in FIG. 10B, the female screw portion 4 has only three to four female ends only on the upper end side (right side in the drawing). The screw hole 4B is preferably used, and the lower end portion (the left side in the figure) is preferably a fool hole 4C (straight hole) without being threaded. Accordingly, when the suspension bolt 1 (see FIG. 1) is screwed into the female screw portion 4 from the lower side, the lower end portion of the female screw portion 4 is formed in the fool hole 4C, so that the suspension bolt 1 is quickly inserted straight. Since the screw reaches the female screw hole 4B and is screwed in, the suspension bolt 1 can be quickly screwed into the female screw part 4 and the workability is good. As apparent from the above description, the female screw hole 4B is suspended before the suspension bolt 1 is attached to the insert T (FIG. 1) embedded in the ceiling housing S in this embodiment. The bolt 1 is screwed from its upper end, and then the suspension bolt 1 is attached to the insert T.

  In the embodiment described so far, the connecting shaft 10 for connecting the first metal fitting 11 and the second metal fitting 12 is formed by a connecting bolt, but in the embodiment shown in FIG. It is formed by a connecting rivet 10A. That is, rivet insertion holes 34A, 36A, and 35A are formed across the pair of sandwiching pieces 6 and 6 of the first metal fitting 11 and the insertion piece 9 of the second metal fitting 12, and the connecting rivet 10A is driven into the holes to connect the metal fittings 11 and 12 to each other. Is mounted so as to be relatively rotatable. In this way, by using the rivet 10A as the shaft 10 for connecting the first metal fitting 11 and the second metal fitting 12, the rivet 10A is inserted into the rivet insertion holes 34A, 36A, 35A, and the insertion ends thereof are caulked and engaged. The first metal fitting 11 and the second metal fitting 12 can be rotatably connected by a one-touch operation that merely forms the stop piece a. For this reason, the workability is extremely good as compared with the screwing work of the connecting bolt of the embodiment.

  FIG. 11 also shows an embodiment in which the first metal fitting 11 and the second metal fitting 12 are respectively formed by die casting. In this embodiment, the first metal fitting 11 is formed of a substantially hollow cylindrical base 5. A thick plate-like insertion piece 9 is formed so as to protrude from the center portion, and the second metal fitting 12 is formed by integrally forming a pair of sandwiching pieces 6 and 6 extending in parallel from the rectangular main portion 8. A connecting rivet 10A is driven over the rivet insertion holes 34A, 36A and 35A into the piece 9 and a pair of holding pieces 6 and 6 sandwiched from both sides of the piece 9, and the flaw hole 4C is formed on the inner peripheral surface of the hollow cylindrical base 5 as described above. The female screw hole 4B is cut to form the female screw portion 4. That is, an embodiment in which the pair of sandwiching pieces 6 and 6 formed on the base portion 5 and the backbone portion 8 shown in FIG. 10 and the insertion piece 9 are exchanged is shown, and the embodiment shown in FIG. However, it is obvious that the same effect as that of the embodiment shown in FIG.

  If the first metal fitting 11 and the second metal fitting 12 are each formed by die casting as described above, it is suitable for mass production and the cost can be reduced. On the other hand, if the 1st metal fitting 11 and the 2nd metal fitting 12 are formed by the press work of a metal plate as mentioned above, the 1st metal fitting 11 and the 2nd metal fitting 12 of various forms can be manufactured cheaply.

DESCRIPTION OF SYMBOLS 1 Suspension bolt 2 Bracing 3 Bracing upper end part mounting bracket 4 Female screw part 4A Female screw hole 4B Female screw hole 4C Stupid hole 5 Base part 6 Clamping piece 7 Screw hole part 8 Base part 9 Inserting piece 10 Connecting bolt 10A Connecting rivet 11 First metal fitting 12 Second metal fitting 13 Screw shaft 14 Nut 28 for fastening L-shaped plate-like metal fitting

Claims (11)

Insert a brace between adjacent suspension bolts in the ceiling base structure, attach the upper end of the brace to the upper end of one suspension bolt and attach it via the upper end fitting, and attach the lower end of the brace to the lower end of the other suspension bolt. A brace attachment device that attaches to the required part of a nearby field receiver,
The brace upper end mounting bracket includes a first bracket formed by projecting a pair of parallel clamping pieces from a base portion having a female screw portion screwed to a suspension bolt, and a trunk portion having a screw hole portion for screwing a screw shaft. A second metal fitting formed by projecting an insertion piece inserted between the sandwiching pieces, and a connecting shaft that pivotally connects the sandwiching piece and the insertion piece inserted therebetween, and The first metal fitting having one end screwed into the screw hole of the second metal fitting and the other end connected to the upper end of the brace, and the female screw screwed to the upper end of the suspension bolt The insertion piece of the second metal fitting is inserted between the sandwiching pieces of the two metal fittings, and both are connected by a connecting shaft tool. The other end of the screw shaft with one end screwed into the screw hole of the second metal fitting is connected to the brace. The bracing is characterized in that it is inserted into the threaded shaft insertion hole of the mounting member attached to the upper end and fixed with a fixture. Apparatus. The first metal fitting is formed by bending a substantially rectangular metal plate into a substantially U shape, forming a semicircular female screw portion inside the bent base portion, and connecting the folded both plate portions as sandwiching pieces. made from those use shaft member has formed a bolt insertion hole for inserting, together with the second bracket, by bending a substantially rectangular metal plate in two, to form the backbone portion cylindrical in its central portion, both ends The insertion part is formed by overlapping the part side, the screw hole part for screwing the screw shaft is provided on the backbone part, and the insertion piece is formed with the bolt insertion hole corresponding to the bolt insertion hole of the first metal fitting. The brace attachment device according to claim 1, wherein   On the inner surface of each holding piece of the first metal fitting, a protrusion that holds the gap between the outer side surface of the insertion piece and the inner surface of the holding piece when the insertion piece of the second metal fitting is inserted between the two holding pieces. The brace attachment device according to claim 2, wherein the brace is provided in a protruding manner.   On the inner surface of each clamping piece of the first metal fitting, there is a protrusion that comes into contact with the suspension bolt from the opposite side of the female screw portion when the semicircular female screw portion inside the base portion is screwed into the male screw portion of the suspension bolt. The brace attachment device according to claim 2, wherein the brace attachment device is protruded. The connecting shaft inserted through the bolt insertion hole of the clamping piece in the first metal fitting and the bolt insertion hole of the insertion piece in the second metal fitting has a length that is larger than the thickness of the insertion piece and smaller than the interval between the two clamping pieces. The brace attachment device according to claim 2, wherein a sleeve is fitted.   The screw hole for screw shaft screwing of the trunk part in the second metal fitting is formed by piercing the bottom plate part of the trunk part by burring and cutting a screw in the hole. Bracing attachment device.   The bracing attachment device according to any one of claims 2 to 5, comprising a nut attached to a bottom plate portion of the backbone portion as a screw hole for screwing the backbone portion of the backbone portion in the second metal fitting. Insert a brace between adjacent suspension bolts in the ceiling base structure, attach the upper end of the brace to the upper end of one suspension bolt and attach it via the upper end fitting, and attach the lower end of the brace to the lower end of the other suspension bolt. A brace attachment device that attaches to the required part of a nearby field receiver,
The brace upper end mounting bracket includes a first bracket formed by projecting a pair of parallel clamping pieces from a base portion having a female screw portion screwed to a suspension bolt, and a trunk portion having a screw hole portion for screwing a screw shaft. A second metal fitting formed by projecting an insertion piece inserted between the sandwiching pieces, and a connecting shaft that pivotally connects the sandwiching piece and the insertion piece inserted therebetween, and The first metal fitting having one end screwed into the screw hole of the second metal fitting and the other end connected to the upper end of the brace, and the female screw screwed to the upper end of the suspension bolt The insertion piece of the second metal fitting is inserted between the holding pieces, and both are connected by a connecting shaft tool, and the other end of the screw shaft having one end screwed into the screw hole of the second metal fitting is formed in an L-shape. Insert into the horizontal plate part of the plate-shaped mounting bracket and fix it with a fixture, and fix the vertical plate part of this plate-shaped mounting bracket to the upper end of the brace made of channel material Brace attachment device being characterized in that as fixed by tapping screws into.   The bracing attachment device according to claim 1 or 8, wherein the first metal fitting and the second metal fitting are each formed by die casting, and the female screw portion of the first metal fitting comprises a female screw hole formed in the base portion.   The brace according to claim 9, wherein the female screw hole of the first metal fitting is formed only on the upper end side in the axial direction, and the lower end portion in the axial direction is formed in the fool hole without threading. Mounting device. , Connecting shaft member between the first fitting and the second fitting strut mounting according to claim 9 or 10, characterized in that it consists of connecting rivets.

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