Structure

Abstract

To provide a structure capable of easily preventing loosening of a nut.SOLUTION: A structure is configured such that: one member 3 holds a bolt 7 in an unrotatable manner; and another member 5 has opposed fins 21, 21, the opposed fins 21, 21 being elastically deformable in an axial direction of the bolt. When an interval between tips 21a, 21a of the opposed fins is A, an interval between opposed corner portions 9a, 9a in the outer periphery of a nut 9 is B, and an interval between opposed two surfaces 9b, 9b in the outer periphery of the nut is C, a relation of C<A<B is satisfied. The fins are pushed in a tightening direction of the nut and elastically deformed in a state that the nut is installed between the fins. The fins are elastically returned at a position where the two opposed surfaces of the nut face the fins due to the rotation of the nut, and the nut is thereby arranged between the tips of the opposed fins. A shaft 7b of the bolt is inserted into the one member and the other member and is fixed by the nut, and the nut is whirl-stopped by the opposed fins.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a structure.

Background Art

[0002] Conventionally, when fixing one member and another member with bolts and nuts to prevent loosening of the nuts, the nuts tightened on the axes of the bolts were fixed by welding or the like, which was time-consuming.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Therefore, an object of the present invention is to provide a structure that can easily prevent loosening of nuts.

Means for Solving the Problems

[0004] The invention according to claim 1 includes one member, another member, and bolts and nuts, the one member holds the bolt in a non-rotatable manner, the other member has opposing fins, and the opposing fins It is integrally provided on the other member along the longitudinal direction, are elastically deformable in the axial direction of the bolt. When the distance between the tips of the opposing fins is A, the distance between the opposing corner portions on the outer periphery of the nut is B, and the distance between the opposing two surfaces on the outer periphery of the nut is C, they have a relationship of C < A < B. With the nut installed between the fins, the fins are pushed in the tightening direction of the nut and elastically deformed, and at the position where the opposing two surfaces of the nut face the fins due to the rotation of the nut, the fins elastically return and the nut is arranged between the tips of the opposing fins. The axis of the bolt is inserted through the one member and the other member and fixed with a nut, and the nut is prevented from rotating by the opposing fins. It is a structure characterized by this.

[0005] The invention according to claim 2 includes one member, another member, and a fin member, Two or more Comprising a bolt and a nut, one member holds the bolt non-rotatably, the other member is provided with a fin member on the opposite side of the one member, the fin member has opposing fins, and the opposing fins are Are provided in the longitudinal direction, elastically deformable in the axial direction of the bolt, Two or more bolts and nuts are arranged at intervals between the fins, when the distance between the tips of the opposing fins is A, the distance between the opposing corner portions on the outer periphery of the nut is B, and the distance between the opposing two faces on the outer periphery of the nut is C, they are in the relationship of C < A < B. With the nut installed between the fins, the fins are pushed in the tightening direction of the nut and elastically deformed, and at the position where the opposing two faces of the nut face the fins due to the rotation of the nut, the fins elastically return and the nut is arranged between the tips of the opposing fins. The axis of the bolt is inserted through the one member, the other member and the fin member and fixed with a nut, and the nut is prevented from rotating by the opposing fins. It is a structure characterized by this.

Advantages of the Invention

[0006] According to the inventions described in Claims 1 and 2, by positioning the opposing two faces of the nut at the position where the tips of the fins face each other, when the nut tries to rotate, the corner portions abut against the tips of the fins and prevent the nut from rotating, so loosening of the nut can be prevented. By using the fins as elastically deformable members and setting the distance between the tips of the opposing fins to a predetermined distance with respect to the nut, loosening of the nut can be prevented by the operation of tightening the nut while pushing in the fins, which is simple.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, the first embodiment will be described with reference to FIGS. 1 to 3. As shown in FIGS. 2 and 3, the structure 1 according to the present embodiment is a transport pallet, and includes one member 3, the other member 5, bolts 7, and nuts 9.

[0009] One member 3 is a bundle. In the present embodiment, two of the same kind are provided in parallel with a space therebetween to form a pair. Each one member 3 is an extruded shape made of aluminum or an aluminum alloy. Each one member 3 is integrally formed with a main body portion 3a formed in a pipe shape having a hollow with a square end opening, and the other member receiver 3b protruding continuously from the side surface of the main body portion 3a. One side surface of the main body portion 3a serves as a mounting wall 3c for mounting the other member 5. The other member receiver 3b receives the end opening of the other member 5 placed on the mounting wall 3c, and is provided along the longitudinal direction of the main body portion 3a. In one member 3, bolt head engagement grooves 11 for engaging the head 7a of the bolt 7 are formed in the wall 3d on the side opposite to the mounting wall 3c. Two bolt head engagement grooves 11 are formed in parallel along the longitudinal direction of the one member 3. Each bolt head engagement groove 11 has a groove width substantially the same as the two-sided width (described later) of the head 7a of the bolt 7, and holds the bolt 7 in a non-rotatable state (see Fig. 1(g)). As shown in Fig. 3, shaft insertion holes 13 for inserting the shaft 7b of the bolt 7 are formed in the mounting wall 3c and the wall 3d on the side opposite to the mounting wall 3c, respectively.

[0010] The other member 5 is a beam installed between a pair of the one members 3, and a large number, five in this embodiment, are provided substantially in parallel between the one members 3. The other member 5 is an extruded profile of aluminum or an aluminum alloy. The other member 5 is elongated, and as shown in Fig. 3 by being extracted with a dashed line, it integrally includes a main body portion 5a and fin portions 5b. The main body portion 5a has a small end with a rectangular shape, and a mounted wall 5c mounted on the mounting wall 3c of the one member 3 and a nut receiving wall 5d for receiving the nut 9 are provided. A filler plate 17 for adjusting the height of the received nut 9 is provided on the nut receiving wall 5d. The filler plate 17 adjusts the height of the received nut 9 by its thickness dimension, and is arranged across the longitudinal direction of the other member 5. Shaft insertion holes 15 for inserting the shaft 7b of the bolt 7 are formed in the mounted wall 5c, the nut receiving wall 5d, and the filler plate 17, respectively.

[0011] The fin portions 5b are integrally provided on the main body portion 5a of the other member 5, and opposing fins 21, 21 and rising portions 23 of each fin 21 are provided. Each fin 21 is formed in a strip shape across the longitudinal direction of the other member 5. The opposing fins 21, 21 are respectively provided continuously to the rising portions 23, and the tips 21a face each other with a gap therebetween. Each fin 21 is elastically deformable in the axial direction of the bolt 7, and elastically deforms such that the tip 21a approaches the nut receiving wall 5d from a state substantially parallel to the nut receiving wall 5d, and is elastically recoverable to a state parallel to the nut receiving wall 5d (see FIGS. 1(e) and 1(f)). The rising portion 23 is provided at the base end portion of the fin 21, is provided by rising from the nut receiving wall 5d of the main body portion 5a, and cantilever supports the fin 21 at a position at a predetermined height from the nut receiving wall 5d.

[0012] As shown in FIG. 2, the nut 9 is a hexagonal nut and includes an outer peripheral corner portion 9a and surfaces 9b provided between the corner portions 9a. In addition, in FIG. 2, the shaft 7b of the bolt 7 has a portion protruding from the nut 9 removed.

[0013] Here, the dimensional relationship between the tips 21a, 21a of the opposing fins 21, 21 and the nut 9 will be described. As shown in FIGS. 1(e-1) and 1(f-1), when the distance between the tips 21a, 21a of the opposing fins 21, 21 is A, the distance between the opposing corner portions 9a, 9a on the outer periphery of the nut 9 is B, and the distance between the opposing surfaces 9b, 9b on the outer periphery of the nut 9 is C, the relationship is C < A < B.

[0014] Next, the assembly of the structure according to the present embodiment will be described. As shown in FIGS. 2 and 3, the other member 5 is installed between the one members 3, 3. The installation of the other member 5 can be easily positioned by bringing the edge of the other member 5 into contact with the other member receiver 3b of the corresponding one member 3. Next, the bolts 7 and nuts 9 are used to fix each one member 3 and the other member 5, and the bolts 7 and nuts 9 are attached as follows.

[0015] First, as shown in Fig. 1(a), in one member 3, the shaft 7b of the bolt 7 is inserted through the wall 3d on the side opposite to the mounting wall 3c of the other member 5, each shaft insertion hole 13 (see Fig. 3) of the mounting wall 3c, the mounted wall 5c of the other member 5, the nut receiving wall 5d, and the shaft insertion hole 15 of the filler plate 17. Then, the tip of the shaft 7b of the bolt 7 is projected from between the opposing fins 21, 21. As shown in Fig. 1(g), the head 7a of the bolt 7 forms a hexagon in plan view, and the bolt 7 is made non-rotatable by engaging the head 7a of the bolt in the bolt head engagement groove 11 with the opposing two faces of the hexagon facing the groove walls 11a, 11a.

[0016] Next, as shown in Fig. 1(b), the nut 9 is installed on the tips 21a, 21a of the opposing fins 21. At this time, the nut 9 is attached to the tip of the shaft 7b of the bolt 7 protruding from the tips 21a, 21a of the fins 21 and rotated by hand, and is screwed to the position of the fins 21, thereby being installed on the tips 21a, 21a of the fins 21. After that, as shown in Fig. 1(c), the tightening jig 25 for the nut 9 is placed over the nut 9. The tightening jig 25 is, for example, a hexagon wrench, and the socket of the hexagon wrench is placed over the nut 9.

[0017] Next, as shown by the arrow in Fig. 1(d), the tightening jig 25 is rotated to tighten the nut 9 while pressing the tips of the opposing fins 21 against the nut receiving wall 5d side of the other member 5 with the tightening jig 25. As a result, the tips 21a of the fins 21 are elastically deformed so as to approach the nut receiving wall 5d. Then, as shown in Figs. 1(e)(e - 1), when the nut 9 abuts against the filler plate 17, the tightening jig 25 is removed from the nut 9.

[0018] As shown in Fig. 1(e-1), when the tightening jig 25 is removed from the nut 9, when the corner 9a of the nut 9 is located at the tip 21a of the fin 21, turn the nut 9 in the tightening direction or the loosening direction by about 30°. As shown in Fig. 1(f-1), by positioning the two surfaces 9b, 9b of the nut 9 opposite to the tip 21a of the fin 21, as shown in Fig. 1(f), the fin 21 elastically returns, and the fin 21 becomes substantially parallel to the nut receiving wall 5d. On the other hand, when the tightening jig 25 is removed from the nut 9, as shown in Fig. 1(f)(f-1), when the two surfaces 9b, 9b of the nut 9 are facing the tip 21a of the fin 21, there is no need to tighten or loosen the nut 9.

[0019] The operation and effect of the first embodiment will be described. As shown in Fig. 2 and Fig. 1(f)(f-1), when the nut 9 positions its two surfaces 9b, 9b opposite to the tips 21a, 21a of the fins 21, when it tries to rotate, the corner 9a abuts against the tip 21a of the fin 21 and the rotation is restricted. Therefore, the rotation of the nut 9 can be stopped and the loosening of the nut 9 can be prevented. In particular, in the first embodiment, since welding as in the prior art is not required, the anti-rotation of the nut can be easily achieved. When the nut 9 is tightened, by rotating it in the tightening direction with the tightening jig 25, the nut 9 can be tightened while elastically deforming the opposing fins 21, 21. Therefore, by simply performing the tightening operation of the nut 9, the elastic deformation of the fins 21, 21 can be simultaneously performed.

[0020] The opposing fins 21 are provided on the other member 5, and the distance C between the tips 21a, 21a is simply set to a predetermined dimension so that the relationship C < A < B (see Fig. 1(e-1)(f-1)) is satisfied, so the structure is simple. Furthermore, since the fin 21 is integrally formed with the other member 5, the number of parts does not increase compared to the case where it is made separate. Since the opposing fins 21, 21 are simply provided with the tips 21a facing each other with an elastically deformable material, processing such as bending of the fin 21 is not required. As shown in FIG. 1(f), a filler plate 17 is provided on the nut receiving wall 5d of the other member 5 to adjust the height of the nut 9 after tightening. Therefore, it is possible to prevent the nut 9 from being displaced in the height direction from between the fins 21, 21 facing each other. Also, when the fins 21, 21 are extrusion-molded on the other member 5, if the dimension between the fins 21, 21 and the nut receiving wall 5d is too narrow, extrusion may not be possible. However, by setting the dimension between the fins 21, 21 and the nut receiving wall 5d (the dimension of the rising portion 23) generously with respect to the height of the nut 9 and adjusting the height with the filler plate 17, the other member 5 can be easily extrusion-molded.

[0021] Hereinafter, other embodiments of the present invention will be described. In the embodiments described below, parts having the same functions and effects as those of the above-described first embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted. Mainly, differences from the first embodiment will be described. Referring to FIGS. 4 and 5, a second embodiment of the present invention will be described. As shown in FIGS. 5(a-1) and (a-2), the structure 1 of the second embodiment is a structure for installing the support column 29, and includes a one-side member 3, an other-side member 5, a fin member 31, a bolt 7, and a nut 9. In this second embodiment, the one-side member 3 is the ground into which concrete is poured, the bolt 7 is an anchor bolt, has no head as in the first embodiment, but is driven into the concrete and held non-rotatably, and the other-side member 5 is provided with a fin member 31 separate from the other-side member 5 on the opposite side of the one-side member 3, which is different from the first embodiment. As shown in FIG. 5(b-1), the other-side member 5 is a base plate having a substantially square shape in plan view, and a square column-shaped support column 29 is fixed at the center. As shown in FIG. 5(a-1), the fin member 31 has a rectangular shape in plan view, and two fin members 31 are provided at positions sandwiching the support column 29 in the other-side member 5. The fin member 31 is arranged with the side surface 29a of the support column 29 and the long side 5e of the other-side member 5 facing each other.

[0022] As shown in Fig. 4, the fin member 31 is provided with a placement portion 31a for placing on the other member 5, opposing fins 21, 21, and a rising portion 23 for rising each fin 21 from the placement portion 31a. The placement portion 31a is formed with shaft insertion holes 32 through which the shaft 7b of the bolt 7 (see Fig. 5(a-2)) is inserted at two locations in the longitudinal direction with a gap therebetween. The opposing fins 21 are elastically deformable in the direction of the shaft 7b of the bolt 7 (see Fig. 5), similar to the first embodiment. Also, in the second embodiment, the dimensional relationship among the interval A between the tips 21a, 21a of the fins 21, the interval B between the corner portions 9a, 9a of the nut 9, and the interval C between the two surfaces 9b, 9b is the same as that in the first embodiment, with the relationship of C < A < B (see Figs. 1(e-1)(f-1)).

[0023] For the assembly of the structure 1 according to this second embodiment, for example, as shown in Figs. 5(b-1)(b-2) showing the existing structure, when the other member 5 with the support column 29 fixed is fixed to the one member (ground) 3 with bolts 7 and nuts 9, the nut 9 and the washer 33 are removed. After that, as shown in Fig. 4, the washer 33 is placed at a position corresponding to the shaft insertion hole 32 by the nut receiving wall 31a of the fin member 31, and the shaft 7b of the bolt 7 is inserted through the shaft insertion hole 32 and the washer 33 to place the fin member 31 on the other member 5. Next, after screwing the nut 9 onto the shaft 7b of the bolt 7 and installing it between the opposing fins 21, 21 (see Fig. 1(b)), while pressing the tip 21a of the fin 21 with the tightening jig 25 as shown in Figs. 1(c)(d), the nut 9 is rotated to elastically deform the fin 21, and then the nut 9 is tightened as shown in Fig. 1(e). And when the corner portions 9a, 9a of the nut 9 are positioned opposite to the tips 21a of the fins 21, the nut 9 is rotated by a predetermined angle to oppose the two surfaces 9b of the nut to the tips of the opposing fins 21, 21, as shown in Fig. 1(f). Note that, similar to the first embodiment, when the tightening jig 25 is removed from the nut 9, when the two surfaces 9b, 9b of the nut 9 are opposite to the tips 21a of the fins 21 as shown in Figs. 1(f)(f-1), there is no need to tighten or loosen the nut 9. As a result, similar to the first embodiment, the nut 9 is prevented from rotating between the opposing fins 21, 21.

[0024] According to this second embodiment, similar effects to those of the first embodiment can be obtained, except for the effect of integrally forming the fin portion 5b on the other member 5 in the first embodiment. Moreover, since the opposing fins 21, 21 are fin members 31 separate from the other member 5, by placing the fin member 31 on the other member 5, the opposing fins 21, 21 can be provided on the other member 5. Since it is not necessary to integrally form the fins 21, 21 on the other member 5, the processing of the other member 5 is easy. Also, by providing the fin member 31 on an existing structure in which the one member 3 and the other member 5 are fixed with bolts 7 and nuts 9, the nut 9 tightened on the bolt 7 can be prevented from rotating between the fins 21, 21.

[0025] Next, with reference to FIG. 6, a third embodiment will be described. In this third embodiment, the shape of the fin member 31 is different from that of the second embodiment. That is, as shown in FIG. 6(a-1), the fin member 31 is square in plan view. Further, on the other member 5, rib plates 35, 35 forming an angle of approximately 90° in plan view are provided at positions corresponding to the respective corners of the column 29 having a square cross-section, and the column 29 is supported by the rib plates 35. As shown in FIG. 6(b-1), at each corner of the column 29, a corner region 37 of a square in plan view surrounded by two sides 5e, 5e forming the corner of the other member 5 and the two rib plates 35, 35 is formed. In this third embodiment, the fin member 31 having a square shape in plan view is arranged in the corner region 37 of a square in plan view on the other member 5, and each fin member 31 is inserted through one bolt 7 and fastened with only one nut 9. The steps of attaching the fin member 31 and the nut 9 are the same as those in the second embodiment.

[0026] In this third embodiment, as shown in Fig. 6(a-1), since one bolt 7 is inserted through the fin member 31 and a nut 9 is attached to the bolt, even if the fin member 31 tries to rotate, the fin member 31 abuts its two orthogonal sides 31b and 31c against the rib plates 35 and 35 respectively, and its rotation is blocked. Therefore, rotation of the fin member 31 can be prevented.

[0027] According to this third embodiment, the same operational effects as those of the second embodiment are achieved. Moreover, since the fin member 31 is arranged only in the corner region 37, the area of the fin member 31 can be made smaller than that of the second embodiment, and thus the fin member 31 can be miniaturized.

[0028] The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. For example, in the first embodiment, the filler plate 17 may or may not be integrally formed as a thickness on the nut receiving wall 5d of the other member 5 with its thickness portion. In the first to third embodiments, the opposing fins 21, 21 are not limited to being made of aluminum or an aluminum alloy, and may be made of steel, and the material is not limited. In the second and third embodiments, the other member 5 is not limited to fixing the support column 29, and may be a member that fixes a member that generates vibration such as a motor. In the second and third embodiments, the fin member 31 is not limited to being retrofitted to an existing structure (Figs. 5(b-1)(b-2), Figs. 6(b-1)(b-2)), and may be a structure 1 provided with the fin member 31 from the beginning as shown in Figs. 5(a-1)(a-2) or Figs. 6(b-1)(b-2). The structures according to claims 1 and 2 are not limited to the fixing structures of transport pallets and support columns, and can be used for structures such as carts and exterior products that are subjected to transport vibrations and wind pressure.

Explanation of Reference Numerals

[0029] 1 Structure 3 One member 5 Other member 7 Bolt 9 Nut 9a Corner 9b Surface 21 Fin 21a Tip of the fin 31 Fin member A Spacing between the tips of the fins B Spacing between the corners of the nut C Spacing between two surfaces of the nut

Claims

1. Comprising one member, another member, and a bolt and nut, The one member holds the bolt non-rotatably. The other member has opposing fins, which are integrally provided on the other member along the longitudinal direction and are elastically deformable in the axial direction of the bolt. When the distance between the tips of the opposing fins is A, the distance between the opposing corner portions on the outer periphery of the nut is B, and the distance between the opposing two faces on the outer periphery of the nut is C, there is a relationship of C < A < B. With the nut installed between the fins, the fins are pushed in the tightening direction of the nut and elastically deformed, and at the position where the opposing two faces of the nut face the fins due to the rotation of the nut, the fins elastically return and the nut is disposed between the tips of the opposing fins. A structure characterized in that the axis of the bolt is inserted through the one member and the other member and fixed with a nut, and the nut is prevented from rotating by the opposing fins.

2. Comprising one member, another member, a fin member, and two or more bolts and nuts, The one member holds the bolt non-rotatably. The other member is provided with a fin member on the opposite side of the one member. The fin member has opposing fins, which are provided in the longitudinal direction and are elastically deformable in the axial direction of the bolt. Two or more bolts and nuts are arranged with a space between them between the fins. When the distance between the tips of the opposing fins is A, the distance between the opposing corner portions on the outer periphery of the nut is B, and the distance between the opposing two faces on the outer periphery of the nut is C, there is a relationship of C < A < B. With the nut installed between the fins, the fins are pushed in the tightening direction of the nut and elastically deformed, and at the position where the opposing two faces of the nut face the fins due to the rotation of the nut, the fins elastically return and the nut is disposed between the tips of the opposing fins. A structure characterized in that the axis of the bolt is inserted through the one member, the other member, and the fin member and fixed with a nut, and the nut is prevented from rotating by the opposing fins.

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