JP2012017756A - Connection nut for fixing frame material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection nut for fixing a frame material for easily performing a partial structural change even after assembling, by surely electrically continuing with the frame material, when fixing the frame material to the other member.SOLUTION: This connection nut includes: a body 42 having a pair of side edges 44 mutually opposed in parallel at a little narrower interval than a width of a wide part 18 of a slide groove 14; a screw hole 28 arranged in a central part of the body 42; and a pair of striped projections 48 arranged in an area sandwiched by the screw hole 28 of a body surface 42a and the pair of side edges 44, opposed at a wider interval than an interval of a pair of opening ends 20 of the slide groove 14 and mutually parallel to the pair of side edges 44. An external shape of the body 42 is a substantially square shape, and the body 42 has the striped projections 48 and 50 in parallel to the pair of side edges 42 and 44. The striped projections 48 and 50 are shorter in the length than the interval of the pair of opening ends 20 of the slide groove 14, and are higher in a height than a thickness of an insulating film of a frame material 12 surface.

Description

  The present invention relates to a connecting nut for fixing a frame material, which is used as a pair with a corresponding connecting bolt when another member is fixed to a frame material which is a long aluminum extruded shape member.

  Aluminum extruded frame material is cut into a predetermined length and processed into parts, then the parts are connected to each other, and the parts and other members are connected to assemble the specified structure. It is done.

  For example, the structure 10 shown in FIG. 5A has a lattice by connecting two vertical parts 12a, which are frame materials 12 for long sides of a rectangular frame, and four horizontal parts 12b for short sides. It is assembled into a shape. As shown in FIG. 6, the frame material 12 used here has a substantially square cross section, and is provided with a wide bottomed slide groove 14 from the four sides toward the center of the cross section. The slide groove 14 has a hollow wide portion 18 into which a later-described conventional connection nut 16 is slidably inserted, and an open end 20 that extends uniformly from the left and right so as to close the upper surface of the wide portion 18. . The wide portion 18 has a width α and a depth β, and a width at which the opening end 20 opens is γ.

  The parts 12a and 12b are fixed by the connecting nut 16, the connecting bolt 22, and the mounting bracket 24 as shown in FIG. The main body 26 of the connecting nut 16 has a substantially square outer shape surrounded by four sides slightly shorter than the width α of the wide portion 18 of the slide groove 14, and the thickness is thinner than the depth β of the wide portion 18. Therefore, when it is put in the wide portion 18 of the slide groove 12, it slides without rotating. Further, a screw hole 28 is provided in the central portion of the main body surface 26a.

  The connecting bolt 22 has a screw portion 30 having a predetermined length and a head portion 32 having a diameter larger than that of the screw portion 30, and a screw groove that is screwed into the screw hole 28 of the connecting nut 16 is formed on the outer periphery of the screw portion 30. Has been. The mounting bracket 24 has an L-shaped outer shape, and through holes 24a through which the threaded portions 30 of the connecting bolts 22 can pass with ease are provided on two planes.

  When the parts 12a and 12b are fixed, first, the connecting nut 16 is inserted into the wide portion 18 of the slide groove 14 of the vertical part 12a, and is positioned at a predetermined place for fixing the counterpart lateral part 12b. Then, one outer surface of the L-shape of the mounting bracket 24 is brought into contact with the side surface of the part 12 a, the threaded portion 30 of the connecting bolt 22 is passed through the through hole 24 a of the mounting bracket 24, and screwed into the screw hole 28 of the connecting nut 16. Tighten and fix. Next, a new connection nut 16 is inserted into the wide portion 18 of the slide groove 14 of the part 12b and positioned at a predetermined location. Then, the end surface of the part 12b is brought into contact with the side surface of the part 12a, and the side surface of the part 12b is brought into contact with the other outer surface of the mounting bracket 24. It passes through the through hole 24a and is screwed into the screw hole 28 of the corresponding connecting nut 16 to be fastened and fixed. Accordingly, in the parts 12a and 12a, the inner surface of the open end 20 and the main body surface 26a of the connection nut 16 are in contact with each other, the inner surface 24b of the mounting bracket 24 and the head rear surface 32a of the connection bolt 22 are in contact with each other. The open end 20 and the mounting bracket 24 are sandwiched between the connecting nut 16 and the connecting bolt 22. By performing such fixing at a plurality of locations, the two vertical parts 12a and the four horizontal parts 12b are fixed via the mounting bracket 24, and the structure shown in FIG. 10 is assembled.

  Moreover, the structural material fixing device disclosed in Patent Document 1 is used for assembling a structure such as the structure 10 described above, and a predetermined nut holder is attached to the main body of the connecting nut, and in this state. A connecting nut is inserted into the wide part of the slide groove of the structural material. According to this configuration, the coupling nut is held in the wide portion by an appropriate elastic force of the nut holder, and positioning of the coupling nut is facilitated.

  In addition, the structural material coupling structure disclosed in Patent Document 2 is different from the above example in the method of using the connection nut 16 and the connection bolt 22 in the structure of the structure 10 described above. When the members of the joint structure of Patent Document 2 are used for the connection nut 16 and the connection bolt 22 in the structure 10, the assembly is performed as follows. First, the head portion of the bolt disclosed in Patent Document 2 is inserted into the wide portion 18 of the slide groove 14 of the vertical part 12a, and positioned at the place where the other side part 12b is attached. Then, the threaded portion of the bolt is passed through the through hole 24a of the mounting bracket 24, one outer surface of the mounting bracket 24 is brought into contact with the side surface of the part 12a, and the connecting nut 16 is screwed and tightened to be fixed. Accordingly, the inner side surface of the opening end 20 of the part 12a and the back surface of the head of the bolt come into contact with each other, the inner side surface 24b of the mounting bracket 24 and the main body surface 16a of the connecting nut come into contact, and the opening end 20 and the mounting bracket 24 are connected. The structure is sandwiched between the nut 16 and the bolt. Furthermore, this structural material coupling structure is provided with a pair of convex portions on the back surface of the head of the bolt, and when the bolt and the connecting nut 16 are screwed together and tightened, the convex portion bites into the inner surface of the opening end 20. In addition, the coupling structure becomes strong and misalignment hardly occurs. Further, in Patent Document 2, as examples of the shape of the convex portion, those having a conical pointed shape, those having a pointed shape in a polygonal pyramid shape, and pointed convex ridges curved in an arc shape around a screw portion are disclosed. Etc. are described.

JP 2000-205228 A Japanese Patent Laid-Open No. 11-293767

  In general, semiconductor manufacturing devices and flat panel display manufacturing devices handle electronic components and elements that are sensitive to static electricity. Therefore, when a device structure is configured using the metal frame material as described above, Each frame member is electrically short-circuited and connected to the ground so that static electricity is not charged.

  In the case of the conventional structure 10, the parts 12a and 12b, the connection nut 16, the connection bolt 22, and the connection fitting 24 are all conductors. However, in order to improve corrosion resistance and wear resistance, the aluminum extruded frame member 12 has been subjected to anodizing to form an insulating aluminum oxide film on the surface of the substrate, and the aluminum base metal is exposed. An oxide film is also easily formed on the surface of the substrate by natural oxidation at the part. When the respective members are assembled in this state, the surfaces of the parts 12a and 12b and the surface 16a of the connecting nut 16 are only brought into contact with each other, so that they are not electrically connected by the oxide film on the surfaces of the parts 12a and 12b. Therefore, it is necessary to take separate measures for energization in order to ensure countermeasures against static electricity.

  On the other hand, when the structure 10 is configured using the bolt disclosed in Patent Document 2, a pair of convex portions provided on the back surface of the head of the bolt are opened by screwing and tightening the connecting nut 16. It is thought that it is possible to cut into the inner surface of the end 20 and break through the oxide film on the surface of the parts 12a and 12b to reach the substrate and to conduct. However, there is a problem in that it is difficult to finely adjust the bolt position after being tightened and fixed. For example, after the connection nut 16 that has been tightened is slightly loosened to release the state in which the convex portion of the bolt bites into the inner surface of the open end 20 of the part 12a (or 12b), the bolt is moved in the longitudinal direction of the slide groove 14. When slightly shifting and tightening the connection nut 16 again, if the convex part of the bolt is located inside the bite mark formed at the first tightening, the convex part is guided toward the center of the conical recess. The bolt may not be fixed at a desired position. Similarly, when the bolt is provided with a pointed ridge that is curved in an arc shape, when the connection nut 16 is tightened again, the pointed ridge is bite mark (arc shape) formed at the first tightening. It is difficult to fix the bolt at a desired position because it is guided by abutting against the end of the dent that is curved to the right.

  Furthermore, in the case of the structural material coupling structure disclosed in Patent Document 2, since the bolt head is inserted into the slide groove 14 of the parts 12a and 12b, the portion exposed to the outside becomes the screw portion of the bolt, and the bolt This has a structure in which a large number of screw ends are projected, which is not preferable in appearance. Furthermore, if the protrusion amount of the screw thread tip of the bolt is reduced, once the structure 10 is assembled, it cannot be easily performed even if it is desired to change a part of the configuration. For example, after assembling the structure 10 of FIG. 5A, the configuration is changed as shown in FIG. 5B, and a new separate member 34 is inserted and fixed to the second part 12b from the top. In this case, the second part 12b from the top must be replaced with a new part having a shorter length, and the bolt in the slide groove 14 of the part 12a must be replaced with a new connecting bolt having a longer thread. . However, in order to remove the bolt to be replaced, at least the second part 12b from the top must be disassembled, which is troublesome. Further, when the structure has a structure that is more complicated than that of the structure 10, it takes a lot of time to remove the bolts. In practice, a method of discarding the assembled structure and reassembling the structure is selected. It will be.

  The present invention has been made in view of the above-described background art, and is used in a pair with a connecting nut, and is surely electrically connected to the frame material when the frame material is fixed to another member and partially after assembly. It is an object of the present invention to provide a connecting nut for a frame material that can be easily changed in structure.

  The present invention is a frame material fixing which is held in a slide groove provided on a side surface of a frame material which is a long aluminum extruded shape, and is screwed with a corresponding connecting bolt to fix another member to the frame material. A connecting nut for the main body having a pair of sides facing each other in parallel with a slightly narrower interval than the width of the wide portion of the slide groove, a screw hole provided in the central portion of the main body, A pair of streaks provided between the screw holes on the surface of the main body and the pair of side edges, facing each other at a distance wider than the distance between the pair of open ends of the slide groove, and parallel to the pair of side edges. It is a connection nut for frame material fixation provided with a projection.

  The main body has a rectangular outer shape composed of two pairs of side edges, and the pair of streak protrusions are provided for the screw holes and the two pairs of side edges, respectively. The length of the projection is shorter than the distance between the pair of open ends of the slide groove. Furthermore, the streak-like projections are preferably formed on the front and back of the main body.

  The streak projection has a height equal to or greater than the thickness of an insulating film such as an oxide film on the surface of the frame material, and when tightened with the connecting bolt, the streak projection is on the inner surface of the pair of opening ends. It bites into the insulating film, reaches the base of the frame material, and becomes electrically conductive.

  The connection nut for a frame material according to the present invention includes a frame material that is an aluminum extruded profile and another member that is a conductive material sandwiched between a pair of connection bolt heads that are used as a pair. As a result, the entire assembled structure is reliably short-circuited, so that the structure can be easily protected from static electricity.

  Further, even after the structure is assembled, fine adjustment of the mounting position and partial structural change can be easily performed.

It is the front view (a) which shows 1st embodiment of the connection nut of this invention, and a right view (b). It is sectional drawing which shows a mode that the frame material and the attachment metal fitting were fixed using the connection nut and connection bolt of this embodiment. It is the front view (a) which shows the modification of the connection nut of this invention, and a partially broken right view (b). It is the front view (a) which shows the other modification of the connection nut of this invention, and the front view (b) which shows another modification. It is the front view (a) of the structural example comprised using the frame material, and the front view (b) which changed a part of the structure. It is a top view which shows the cross-sectional shape of the frame material used for the structure of FIG. It is a perspective view explaining the assembly method of the structure of Fig.5 (a).

  Hereinafter, the connecting nut 40 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. Here, the frame material 12 to which the coupling nut 40 of this embodiment is applied will be described with the same reference numerals assigned to the same components as those shown in FIGS. The connection nut 40 is used in the same manner as the conventional connection nut 16, and can be used when the parts 12 a and 12 b are assembled using the connection bolt 22 and the mounting bracket 24.

  The outer shape of the main body 42 of the connecting nut 40 is a substantially square shape surrounded by four sides slightly shorter than the width α of the wide portion 18 of the slide groove 14 shown in FIG. It has an outer shape and is thinner than the depth β of the wide portion 18. Therefore, when it is put in the wide portion 18 of the slide groove 12, it slides without rotating. Further, a screw hole 28 is provided in the central portion of the main body surface 26a.

  The main body surface 42 a is provided with a pair of streak protrusions 48 having a slightly sharp upper end at a portion sandwiched between the screw hole 28 and the pair of side sides 44. The pair of streak protrusions 48 are provided in parallel to the side edge 44, and the interval is wider than the interval between the pair of opening ends 20 of the slide groove 14, and the individual length is shorter than the width γ of the opening end 20. A pair of similar streak protrusions 50 are also provided at a portion sandwiched between the screw hole 28 and the pair of side edges 46. Although the height of the streaks 48 and 50 will be described later, it is set to, for example, about 0.2 to 0.5 mm, preferably 0.25 mm. As shown in FIG. 1, the connecting nut 40 is symmetrical in the vertical and horizontal directions when viewed from the main body surface 42a. Therefore, when the connecting nut 40 is inserted into the wide portion 18 of the slide groove 14 of the parts 12a and 12b, the direction of the side edges 44 and 46 is not careful. There is no need to

  Next, a method for assembling the structure 10 using the connection nut 40 will be described using the examples shown in FIGS. The assembly procedure is almost the same as that in the case of using the conventional connecting nut 16, but when the connecting nut 40 is inserted into the wide portion 18 of the slide groove 14 of the vertical part 12 a, the streak protrusions 48 and 50 are inserted into the slide groove 14. Toward the open end 20 side of the. The directions of the side edges 44 and 46 are arbitrary, but here, the pair of side edges 46 are placed so as to face each other in the width direction of the wide portion 18. Therefore, in a state after the connecting nut 40 is inserted into the wide portion 18 and before the connecting bolt 22 and the mounting bracket 24 are attached, as shown in FIG. The pair of streaks 50 are exposed from between the open ends 20 and are hidden inside the open ends 20.

  The connecting nut 40 is inserted into the wide portion 18 and then slid to be positioned at a predetermined location, and one plane of the mounting bracket 24 is brought into contact with the side surface of the vertical part 12a. Then, the threaded portion 30 of the connecting bolt 22 is passed through the through hole 24a of the mounting bracket 24, screwed into the screw hole 28 of the connecting nut 16, and tightened. When the connecting bolt 22 is tightened, the connecting nut 16 moves to the opening end 22 side of the slide groove 14 and the streak 50 comes into contact with the inner surface of the opening end 20 and is tightened with a stronger torque as shown in FIG. In addition, the streaky protrusion 50 bites into the inner surface of the open end 20.

  When the connecting bolt 22 is sufficiently tightened, as shown in FIG. 2, the inner surface of the open end 20 of the part 12a and the main body surface 26a of the connecting nut 16 come into contact with each other, and the surface 24b of the mounting bracket 24 and the head of the connecting bolt 22 The part back surface 32 a abuts, and the open end 20 and the mounting bracket 24 are fixed while being sandwiched between the connection nut 16 and the connection bolt 22.

  The part 12a is obtained by processing a frame material 12 of an aluminum extruded profile, and an oxide film (generally 20 μm or less) is formed on the surface of the substrate by anodizing. However, since the height of the streak-like protrusion 50 of the connecting nut 40 is set to about 250 μm, for example, the oxide film (insulating film) of the part 12a is surely pierced and bites into the metal, so the part 12a and the connecting nut 16 can be electrically conductive.

  Further, after tightening and fixing the connecting bolt 22 and finely adjusting the fixing position, the connecting bolt 22 is slightly loosened, and the streak 50 of the connecting nut 40 bites into the inner surface of the opening end 20 of the part 12a. After releasing the state, the connecting bolt 22 is slightly shifted in the longitudinal direction of the slide groove 14 and tightened again. At this time, the biting trace (streak-shaped depression) formed by the streak 50 formed at the first tightening is formed in parallel to the longitudinal direction of the slide groove 14, so that the connecting nut 40 is slightly shifted and the opening end again. When biting into the inner surface of 20, part of the streaks 50 fits in the first bite mark, and the remaining part can bite into the position where the bite mark extends straight. Therefore, the position where the connecting bolt 22 and the connecting nut 40 are fixed can be easily finely adjusted.

  Further, the connecting bolt 22 can be easily removed even after the structure 10 is assembled, and can be freely replaced with another connecting bolt having a different length of the screw portion 30. Therefore, after the structure 10 is assembled, it is possible to easily cope with a partial structural change as shown in FIG.

  As described above, the connecting nut 40 is an assembled structure by sandwiching and fixing the part 12a, which is an aluminum extruded profile, and the mounting bracket 24 between the connecting bolts 22 used in a pair. Since each member of 10 is reliably short-circuited to the same potential, it is possible to easily take measures against static electricity of the structure 10. Further, even after the structure 10 is assembled, fine adjustment of the attachment position of each member and partial structural change can be easily performed.

  The present invention is not limited to the above embodiment. For example, like the connecting nut 40 shown in FIG. 3, the streaks 48 and 50 may be provided on the main body surface 42a and the main body back surface 42b. Thereby, it can attach to the frame material 12 without minding the front and back of the connection nut 40, and the attachment mistake which made the front and back reversed can be eliminated.

  Further, for example, like the connection nut 60 in FIG. 4A, the streak protrusion 62 having the same length as the streak protrusion 48 at the position of the pair of side edges 44 of the main body surface 42 a of the connection nut 40 described above. Further, a streak 64 having the same length as the streak 50 may be provided at the position of the pair of side edges 46. Since the area where the connecting nut 60 bites into and contacts the base of the part 12a increases, the stability of the electrically conductive state is improved, the fixing structure is strengthened, and the durability is improved. The number of streaks added can be freely set.

  In addition, like the connection nut 70 in FIG. 4B, the pair of streak protrusions 48 is deleted from the configuration of the connection nut 40, and the pair of side sides 46 of the main body 42 are made longer than the side sides 44, and accordingly. Thus, the pair of streaky protrusions 50 may be lengthened. When the connecting bolt 70 is inserted into the wide portion 18 of the slide groove 14 of the parts 12a and 12b, the parallelism between the streaks 50 and the side surface of the wide portion 18 can be increased, so that the connecting bolt 22 is temporarily tightened. The work of finely adjusting the fixed position later can be performed with higher accuracy.

DESCRIPTION OF SYMBOLS 10 Structure 12 Frame body 12a Vertical part 12b Horizontal part 14 Slide groove 16,40,60,70 Connection nut 18 Wide part 20 Open end 22 Connection bolt 24 Mounting bracket 26 Main body 28 Screw hole 30 Screw part 32 Head part 32a Head part Back 34 Separate member 42 Main body 44, 46 Side 48, 50 Streaky projection

Claims (4)

For fixing the frame material, which is held in the wide portion of the slide groove provided on the side surface of the frame material which is a long aluminum extruded shape, and is screwed with the corresponding connecting bolt to fix other members to the frame material. In the connecting nut,
A main body having a pair of sides facing each other in parallel with an interval slightly narrower than the width of the wide portion of the slide groove;
A screw hole provided in the central portion of the main body;
A pair of muscles provided between the screw hole and the pair of side edges on the surface of the main body, facing each other at a distance wider than the distance between the pair of opening ends of the slide groove, and parallel to the pair of side edges. A connecting nut for fixing a frame material, characterized by comprising a protrusion.   The main body has a rectangular outer shape having two sets of the pair of sides, and the pair of streak protrusions are provided for the screw holes and the two sets of sides, respectively, The connecting nut for frame material fixation according to claim 1, wherein the length of the streaky projection is shorter than the distance between the pair of open ends of the slide groove.   The connecting nut for fixing a frame material according to claim 1, wherein the streak protrusion is formed on the front and back of the main body. The streak projection has a height greater than or equal to the thickness of the insulating film on the surface of the frame material, and when tightened with the connecting bolt, the streak projection bites into the insulating film on the inner surface of the pair of opening ends. The connection nut for fixing the frame material according to claim 2 or 3, wherein the connection nut reaches the base of the frame material and is electrically connected.

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