JP5574871B2 - Structural member with fastening member - Google Patents

Description

  The present invention relates to a structural member with a fastening member that is lightweight, excellent in rigidity, excellent in installation workability, and excellent in transportability.

  Mechanical fasteners such as bolts and nuts are generally used to fasten structural members (hereinafter referred to as structural members) such as automobile bumpers and intrusion prevention devices, and building beam members. The mechanical fastener has excellent characteristics such as good workability and no thermal distortion as compared with attachment by welding. In a mechanical fastener, there are a nut plate for joining a nut to a plate and a bolt plate for joining a bolt to a plate in order to attach a plurality of bolts and nuts at one time (Patent Document 1, Patent Document 2).

  FIG. 18 is a cross-sectional view showing a method for attaching the bolt plate 102 to the structural member 100. A bolt insertion hole 103 is formed on the attachment surface of the structural member 100 to another member so as to extend in the longitudinal direction of the structural member 100, and the cross section is reversed so as to surround the upper part of the long insertion hole 103. A U-shaped guide portion 101 is formed. Then, the bolt plate 102 to which the plate 104 is joined is disposed in a state in which the bolt head and the plate 104 are accommodated in the guide portion 101 and the bolt portion is inserted through the bolt insertion hole 103 and exposed to the outside. ing. By inserting the bolt portion into the hole of the mating structural member and screwing a nut (not shown) into the bolt portion, the structural member 100 and the mating structural member are fixed to each other. In this prior art, the guide portion 101 serves as a guide for guiding the bolt plate 102 to the predetermined mounting position of the structural member 100 along the insertion hole 103, but also has a function of preventing the plate 104 from falling off. .

  On the other hand, Patent Document 3 discloses a structure in which a protrusion is provided on a structural member and a washer having an elastic protrusion is fitted to the bolt in order to prevent the bolt from falling off before the bolt is tightened with a nut. Has been. Since the elastic protrusion of the washer is locked to the protrusion provided on the structural member, the bolt is prevented from being detached from the structural member.

Japanese Utility Model Publication No. 5-54106 Japanese Patent Laid-Open No. 62-160383 Japanese Utility Model Publication No. 50-93573

  However, the conventional fastening device described above has the following problems. First, the bolt plate needs to be provided with an inverted U-shaped guide portion 101 on the inner surface of the structural member 100 in order to pass the plate and the head of the bolt and prevent the bolt plate from falling off. A slit-like hole 103 for passing (screw part) is required. Similarly, in order to pinch the nut plate and prevent the nut plate from falling off, it is necessary to provide a guide portion, and it is necessary to make a hole for passing a bolt protruding from the nut.

  For this reason, the shape of the structural member is inevitably complicated, resulting in an increase in the weight of the structural member. Furthermore, when the structural member is, for example, a JIS 7000 series aluminum alloy extruded shape, the strength may be too high to form the structural member.

  Further, in Patent Document 3, by attaching a washer having an elastic protrusion to a bolt, a structure that prevents the bolt from falling off by locking the protrusion and the elastic piece can be taken, but the washer and the bolt are fixed. Therefore, it is necessary to fasten the bolt head with a tool, and there is a problem that it cannot be applied to a structural member having a closed cross section.

  Further, in order to prevent the nut plate to which the nut is fixed or the bolt plate to which the bolt is fixed from moving in the rail direction, it is necessary to fix it to the structural member with a rivet.

  The present invention has been made in view of such problems, and provides a structural member with a fastening member that is lightweight and rigid, has excellent on-site workability, and has excellent transportability of the structural member. With the goal.

The structural member with a fastening member according to the present invention is a structural member with a fastening member provided with a fastening member for attaching a structural member formed into a rectangular tube shape by extrusion molding of an aluminum alloy to another member.
The structural member is
It has a hollow shape with a mounting hole through which a bolt is inserted into the mounting surface, and is inward on both inner side surfaces rising from both ends of the mounting surface or on the inner side surfaces of a pair of engaging walls erected on the mounting surface Protrusions projecting on are formed,
The fastening member is
A plate in which a bolt insertion hole is formed;
Bolts shorter than the distance between the inner surface of the wall provided with the mounting hole in the structural member and the facing surface thereof, the screw portion is inserted into the bolt insertion hole, and the head remains on the plate,
A plate-like locking member fixed separately or integrally with the plate,
The locking member is
The plate extends from both sides of the plate and abuts against the inner side surface of the structural member or the inner side surface of the engagement wall, and at the corner between the inner side surface of the structural member or the inner side surface of the engagement wall and the projection. It has a locking part that is locked and positions the bolt in the bolt insertion hole,
The locking part can get over the protrusion when the plate moves toward the mounting surface, but the plate is locked to the protrusion when the plate tries to move away from the mounting surface. shaped, the locking portion is Ri elastically deformable der for the portion on the plate of the locking member,
The fastening member is inserted into the hollow structural member in the longitudinal direction, and the screw portion moves to the position of the attachment hole,
The screw portion of the bolt protrudes from the mounting hole in a state before the locking portion gets over the protrusion .

  In this structural member with a fastening member, for example, the locking member has a base portion that overlaps the plate, the locking portion extends from both ends of the base portion to both sides thereof, and the locking portion is the base portion. By being bent at an obtuse angle, the locking portion is bent with respect to the base to overcome the protrusion when the plate moves toward the mounting surface. The plate is locked to the protrusion when the plate moves in a direction away from the mounting surface.

  Furthermore, it is preferable that the head of the bolt is fixed to the plate by welding or caulking.

  Furthermore, it is preferable that the locking member is made of metal or plastic and is elastically deformable. The structural member is preferably an aluminum alloy profile.

  In the present invention, since the locking portion of the locking member fixed to the plate or integrally formed with the plate is in contact with the inner surface of the structural member, the position of the plate, that is, the position of the bolt is set to a predetermined value. It can be arranged with high accuracy at the position.

  Then, when the plate of the fastening member is moved toward the mounting surface of the structural member, the locking portion of the locking member of the fastening member gets over the protrusion formed on the inner side surface of the structural member, so that the plate Overlapping inside. At this time, the locking portion is locked to the protrusion, and the fastening member is fixed to the structural member without the plate being separated from the mounting surface. This can prevent the bolt from falling off.

  And in a state where this plate overlaps the mounting surface of the structural member, the screw thread portion of the bolt that passes through the insertion hole of the plate protrudes from the mounting hole to the outside of the structural member. The structural member can be attached to the member to be attached by inserting the nut and tightening the nut.

  Further, when the structural member is transported, the locking member is in a state before the locking portion gets over the protrusion, that is, the plate is separated from the mounting surface. Thereby, most of the bolts are accommodated in the structural member, and the portion exposed to the outside from the mounting hole is small, so that the structural member can be transported in a compact state.

  Furthermore, since the bolt head is fixed to the plate by welding or caulking, the threaded portion of the fastening member is inserted into the mounted member, and the nut is screwed into the threaded portion to tighten the nut to the threaded portion. In this case, it is possible to reliably avoid the bolt head from rotating around, so that workability is improved.

  When the locking member is made of metal or plastic and can be elastically deformed, when the plate is pushed toward the mounting surface, the locking portion is deformed so that the portion (base) on the plate can be easily formed. Deformation improves workability.

  Furthermore, since the structural member is a profile made of an aluminum alloy, a cylindrical shape having protrusions can be easily formed, which is effective in reducing the weight and strength of the structural member.

It is a cross-sectional view which shows the structural member with a fastening member which concerns on embodiment of this invention. It is a perspective view showing the fastening member 10 similarly. It is a cross-sectional view which similarly shows the operation | movement. Similarly, in perspective views (a), (b), (c), (d) and front views (a) ′, (b) ′, (c) ′, (d) ′ showing modifications of the locking member is there. It is a figure which similarly shows the fixing method of the bolt head. It is a figure which similarly shows the modification of the fixing method of the bolt head. It is a cross-sectional view which similarly shows a structural member. (A) is a cross-sectional view which shows the conventional storage and carrying state, (b) is a cross-sectional view which shows the storage and carrying state of this embodiment. It is a figure which shows the structural member with a fastening member which concerns on other embodiment of this invention, (a) is a front view of a fastening member, (a ') is the same top view, (b) is the same side view, (c) is a side sectional view of the structural member, (d) is a plan view, and (e) is a side sectional view showing the structural member fixed to the fastened member. It is a figure which shows the structural member with a fastening member which concerns on the modification of other embodiment of this invention, (a) is a front view of a fastening member, (a ') is the same top view, (b) is the same side view FIG. 3C is a side sectional view of the structural member, FIG. 3D is a plan view, and FIG. 3E is a side sectional view showing the structural member fixed to the fastened member. (A), (b), (c) is a figure which shows the problem of FIG.9 and FIG.10. (A), (b), (c) is side surface sectional drawing which shows embodiment of this invention which eliminated the trouble of FIG. In this invention, it is a figure which shows the method of inserting a fastening member in a hollow structure member, (a) is the side sectional drawing, (b) is a front view, (c) is a bottom view. It is a figure which shows the conveyance state of the structural member of FIG. 13, (a) is a side view, (b) is a front view. Similarly, it is a figure which shows the fastening preparation state of the structural member of FIG. 13, (a) is a side view, (b) is a front view. Similarly, it is a figure which shows the state which fixed the structural member of FIG. 13 to the to-be-fastened member, (a) is a side view, (b) is a front view. It is a figure which shows other embodiment of this invention, (a) is before installation of a fastening member, (b) In the middle of installation of a fastening member, (c) shows the state after installation of a fastening member. It is sectional drawing which shows the conventional structural member with a fastening member.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings. FIG. 1 is a transverse sectional view showing an embodiment of the present invention, FIG. 2 is a perspective view showing a fastening member 10, and FIG. 3 is a transverse sectional view showing an operation. The structural member 1 has a rectangular tube shape in cross section, and is, for example, an automobile bumper, an intrusion prevention device, a building beam material, or the like. The attachment surface 9 of the structural member 1 is provided with two attachment holes 3 spaced apart in the longitudinal direction at the center in the width direction. Protrusions 2 projecting inwardly are formed on the inner surfaces of both side surfaces rising from both ends of the mounting surface 9. The structural member 1 is formed into a rectangular tube shape by extrusion molding of an aluminum alloy. However, the material of the structural member 1 is not limited to an aluminum alloy, and may be steel or the like, and is not limited to extrusion molding, and there are various molding methods.

  In the plate 11 of the fastening member 10, two bolt insertion holes 12 are formed in the center in the width direction (width direction of the structural member 1) and separated in the longitudinal direction (longitudinal direction of the structural member 1). Yes. A screw portion 15 of a bolt 13 is inserted into the bolt insertion hole 12, and a head portion 14 of the bolt 13 remains on the plate 11. The head 14 of the bolt 13 is fixed to the plate 11 by welding 30 as shown in FIG. Alternatively, as shown in FIG. 6, a recess 31 is formed at the boundary between the bolt head 14 and the screw portion 15, and the plate 11 is driven into the recess 31 to caulk the bolt head 14 with the meat of the plate 11. Thus, the bolt 13 may be fixed to the plate 11.

  Two locking members 16 are fixed to the plate 11 by welding or bonding between two bolts 13 in the longitudinal direction. The locking member 16 includes a base portion 17 that overlaps the plate 11 and locking portions 18 that extend from both ends of the base portion 17 to both sides thereof. The locking portion 18 is bent at an obtuse angle with respect to the base portion 17. And since this latching member 16 is shape | molded by the elastic material of a metal or a plastic, the latching | locking part 18 can change the attitude | position with respect to the base 17 elastically. That is, the locking portion 18 can be deformed with respect to the base portion 17 so that the angle formed by the locking portion 18 is small, and then the angle formed by the self elastic force can return to the original large state. Note that the plate 11 and the locking member 16 can be integrally formed of a metal plate or a plastic plate.

  Next, the operation of the structural member with a fastening member of the present embodiment configured as described above will be described. First, when the structural member with the fastening member according to the present embodiment is assembled (when the bolt plate is inserted) and stored and transported, as shown in the upper half of FIG. The position in contact with the side surface is above the protrusion 2. For this reason, most of the screw portion 15 of the bolt 13 of the fastening member 10 is accommodated in the structural member 1, and a portion of the screw portion 15 exposed to the outside from the mounting hole 3 of the structural member 1 is very short. For this reason, the structural member 1 has a compact structure and is extremely advantageous during storage and transportation. That is, the structural member 1 of this embodiment is excellent in storage property and transportability. Moreover, since the front-end | tip of the latching | locking part 18 is contact | abutting to the inner surface of the structural member 1, compared with the case where there is no latching part like before, the volt | bolt currently fixed to the plate 11 of a fastening member 13 is positioned with high accuracy at the position of the mounting hole 3 of the structural member 1. Moreover, since the latching | locking part 18 can be elastically deformed, the position of this volt | bolt 13 is a direction parallel to the surface of the plate 11 in the deformable range, when the latching | locking part 18 deform | transforms elastically. Some position adjustment is possible.

  When attaching the structural member 1 to a predetermined attached member (such as a vehicle frame stay), the screw portion 15 of the bolt 13 that is slightly exposed to the outside from the attachment hole 3 of the structural member 1 is held. Pull out from the structural member 1 to the outside. As a result, the fastening member 10 moves toward the mounting surface on which the mounting hole 3 of the structural member 1 is formed, as indicated by the white arrow in FIG. Then, as shown in the lower half of FIG. 3, the angle formed by the locking portion 18 with respect to the base portion 17 is deformed so that the tip of the locking portion 18 gets over the protrusion 2, and the locking portion 18 is After overcoming the projection 2, the locking portion 18 returns to its original state elastically, the plate 11 overlaps the mounting surface, and the tip of the locking portion 18 is locked to the lower corner of the projection 2. As a result, the fastening member 10 cannot move so that the plate 11 is spaced upward from the mounting surface, is restrained in the state shown in FIG. 1, and the bolts 13 are prevented from falling off. At this time, the screw portion 15 of the bolt 13 of the fastening member 10 protrudes downward from the mounting hole 3. Thereby, the screw member 15 is inserted into the hole provided in the attached member such as the stay, and the nut is screwed into the screw portion 15 to tighten the nut. 1 is attached to a member to be attached such as a stay and fixed.

  In this way, the structural member 1 can be attached to the attached member very easily. Since the structural member 1 is formed of an extruded shape of an aluminum alloy, the structural member 1 is lightweight and can be easily formed. The aluminum alloy constituting the structural member 1 can be made of various materials from JIS 1000 series to 8000 series, but 6000 series or 7000 series aluminum alloys are advantageous because of their high strength. Further, since the locking member 16 is also formed of an elastic material of aluminum alloy or plastic, the fastening member 10 can be easily pushed over the protrusion 2 and the workability is excellent. Further, the head portion 14 of the bolt 13 is fixed to the plate 11 by welding or caulking, and the locking portion 18 of the locking member 16 fixed to the plate 11 is rotated by the corner between the inner surface of the structural member and the protrusion 2. Further, as shown in FIG. 2, since two bolts 13 are fixed to one plate 11, when the nut (not shown) is screwed into the screw portion 15, the bolt 13 is Attaching is reliably prevented, and workability is improved.

  The present invention is not limited to the above embodiment, and various modifications can be made. 4A is a perspective view showing a modification of the locking member 16, and FIG. 4A 'is a front view thereof. The locking member 16 has a semicircular curve at the tip of the locking portion 18. In the locking member shown in FIGS. 4B and 4B ′, the first portion 18a of the locking portion is bent obliquely upward from the base portion 17, but the second portion 18b is further extended from the distal end portion of the first portion. Is bent in the first direction with respect to the first portion 18a. 4 (c) and 4 (c) ′, the first portion 18c of the locking portion is bent at an obtuse angle with respect to the base portion 17, and a semicircular arc is formed at the distal end portion of the first portion 18c. The curved second portion 18d is continuous. The second portion 18d comes into contact with the inner surface of the structural member 1 with a curved surface. In the locking member shown in FIGS. 4D and 4D ′, the first portion 18e of the locking portion is bent at an obtuse angle with respect to the base portion 17, and the upper end of the first portion 18e is The extending second portion 18f is bent and connected to the first portion 18e. This locking part gets over the projection 2 at the boundary between the first part 18e and the second part 18f, and after getting over, the tip of the second part 18f is locked to the lower corner of the projection 2.

  FIG. 7 is a cross-sectional view showing a modified example of the structural member 1. The structural member 1 shown in FIG. 7A is the same as that shown in FIG. The structural member 1 shown in FIG. 7B is provided with a partition wall 4 extending perpendicularly to the center in the width direction, and protrusions 2 are formed on both surfaces of the partition wall 4. Moreover, the hollow structural member 1 is partitioned into two chambers by the partition wall 4, and bolt mounting holes 3a and 3b are formed in the lower wall of each chamber. Thereby, as shown in FIG.8 (b), the two fastening members 10 can be provided in the width direction of the structural member 1 in parallel. Further, the structural member 1 is reinforced by the partition wall 4. The structural member 1 shown in FIG. 7C is provided with three partition walls 4a, 4b, and 4c extending vertically in the hollow structural member 1, and the partition walls 4a, 4b, and 4c are used for partitioning. Protrusions 2a and 2c and mounting holes 3a and 3b are provided in the two outer chambers among the chambers formed. Also in the structural member 1, the structural member 1 is reinforced by the partition walls 4a, 4b, and 4c.

  The structural member 1 shown in FIG. 7D is provided with two upper and lower protrusions 2a and 2b on both inner side surfaces. Thereby, the length of the thread portion of the bolt protruding from the mounting hole 3 differs between the position where the locking portion 18 of the fastening member 10 that contacts the inner surface gets over the protrusion 2b and the position where the engaging portion 18 gets over the protrusion 2a. . Since this structural member 1 has the two-step projections 2a and 2b, the fastening member 10 is stored in the structural member 1 so that the locking portion 18 is located above the upper-step projection 2b during transportation. The fastening member 10 can be pulled out downward so that the locking portion 18 is locked to the projection 2a below the lower projection 2a, so that the fastening member 10 can be fixed at a predetermined position.

  A structural member 1 shown in FIG. 7 (e) is formed by joining a lower member 1b and an upper member 1a by welding 5 into a hollow rectangular tube shape. The lower member 1b and the upper member 1a can be manufactured by being molded so as to have a U-shaped cross section after being formed by pressing, and the cost is lower than that of manufacturing by extrusion.

  FIG.8 (b) shows the state which installed the fastening member 10 in the structural member 1 shown in FIG.7 (b). In this case, as described above, the bolts 13 are arranged in two rows along the longitudinal direction of the structural member, and the structural member can be fixed to the attached member with four bolts at one location. Also in this structural member with a fastening member, during storage or transportation, since the locking portion 18 is above the protrusion 2, the length of the threaded portion 15 of the bolt 13 protruding from the structural member 1 to the outside is short, Most of the screw portion 15 is accommodated in the structural member 1. For this reason, the structural member 1 can be stored compactly or transported.

  On the other hand, in the case of the conventional structural member 100, as shown in FIG. 8A, the length that the screw portion of the bolt protrudes from the structural member 100 is necessary to attach the structural member 100 to the mounted member. This is a necessary length in the mounted state. For this reason, there is a limit to shortening the protruding length of the threaded portion, and as a result, as shown in FIG. 8A, the required space becomes large during storage or transportation.

  Fig.9 (a) is a front view which shows the fastening member 20 of other embodiment of this invention, (a ') is a top view, (b) is a side view. 9C is a side sectional view of the structural member 1 to which the fastening member 20 of this embodiment is attached, FIG. 9D is a plan view of the structural member 1, and FIG. 9E is a plan view of the structural member 1 with the fastening member 20 interposed therebetween. It is side surface sectional drawing which shows the state fixed to the other member 30. In the fastening member 20 of this embodiment, one bolt 23 is fixed to the plate 21. The bolt 23 also has a head portion 24 and a screw portion 25. Two locking members 26 are fixed to the plate 21, and locking portions 28 extend diagonally upward with respect to the base of the locking member 26 at both ends of each locking member 26. Yes.

  The structural member 1 is provided with a pair of engaging walls 6 on both sides of the fastening member 20 on the mounting surface so as to stand perpendicular to the mounting surface. Projections 7 are formed on the upper end portions of the engagement walls 6 so as to face each other.

  As a result, the fastening member 20 is fixed to the mounting surface of the structural member 1 by the distal end portion of the locking portion 28 being locked by the protrusion 7. The other member 30 to which the structural member 1 is fixed has a hole (not shown) through which the screw portion 25 of the fastening member 20 is inserted. The screw portion 25 is inserted into the hole of the member 30. Then, the structural member 1 is fixed to the other member 30 by screwing the nut 31 into the screw portion 25 exposed on the back surface of the member 30. In the present embodiment, the interval between the engagement walls 6 can be arbitrarily determined regardless of the size of the structural member 1 determined from the structural necessity, and therefore the size of the locking portion 28 of the fastening member 20. There is no need to make it unnecessarily large.

  Next, a modification of another embodiment of the present invention with reference to FIGS. 10 (a) to 10 (e) will be described. In this modification, two bolts 23 are fixed to the plate 21 of the fastening member 20, and one locking member 26 is provided in the center between these bolts 23 in FIG. 9. Different from the case. Also in the present modification, similarly, the fastening portion 20 is locked to the projection 7 so that the fastening member 20 is fixed to the mounting surface of the structural member 1.

  FIGS. 11A to 11C are cross-sectional views showing problems of the fastening member 20 shown in FIGS. The fastening member 20 is housed in the structural member 1 and transported. In this case, as shown in FIGS. 11A and 11B, the bolt 23 is likely to fall down. Therefore, as shown in FIG. 11C, the operation of inserting the screw portion 25 of the bolt 23 of the fastening member 20 into the mounting hole 3 tends to be complicated. In this way, the fastening member 20 has the engaging wall 6 erected on the mounting surface of the structural member 1, and the locking portion 18 is locked to the protrusion 7 provided at the tip of the engaging wall for fixing. There is an advantage that the size of the fastening member 20 can be reduced, but conversely, the fastening member 20 is less restricted inside the structural member 1 and has a large play. For this reason, the fastening member 20 becomes messy at the time of transportation, and there is a problem that positioning becomes difficult.

  In order to solve this problem, in the embodiment shown in FIGS. 12A to 12C, two partition walls 4 a and 4 b are provided inside the structural member 1, and the partition walls 4 a and 4 b Two sets of protrusions 2a and 2b are provided on the opposing surface in the vertical direction. And the fastening member 10 similar to FIG. 1 is stored between these partition walls 4a and 4b. And at the time of conveyance, as shown in FIG.12 (b), the screw part 15 is pulled out a little. As a result, the locking portion 18 gets over the upper projection 2a, the tip of the locking portion 18 is located between the upper projection 2a and the lower projection 2b, and the lower portion of the screw portion 15 slightly extends from the structural member 1 to the outside. Exposed to. In this manner, the fastening member 10 is stored in the structural member 1 with the distal end of the locking portion 18 positioned between the upper protrusion 2a and the lower protrusion 2b.

  Thereafter, when the structural member 1 is installed at a predetermined position, the screw portion 15 of the fastening member 10 is further pulled out as shown in FIG. Then, the locking portion 18 gets over the lower projection 2b, the tip of the locking portion 18 is locked by the projection 2b, and the fastening member 10 is prevented from returning into the structural member 1, and the fastening member Most of the ten screw portions 15 are exposed from the structural member 1 to the outside. Therefore, the structural member 1 and the member to be fastened are fixed by fitting the hole of the member to be fastened to the screw part, and screwing the nut to the screw part and tightening the nut.

  In the present embodiment, the size of the fastening member 10 can be set to an arbitrary size by adjusting the interval between the partition walls 4a and 4b, and the locking portion 18 of the locking member 16 is always partitioned. Since it is restrained by the inner surfaces of the walls 4a and 4b, the posture of the bolt 13 is not disturbed during transportation and storage. Therefore, the fastening member 10 can be easily pulled out using the screw portion 15 of the bolt 13.

  Next, a method for arranging the fastening member 10 in the structural member 1 will be described. FIG. 13 (a) is a side sectional view showing this insertion method, FIG. 13 (b) is a front view thereof, and FIG. 13 (c) is a bottom view thereof. Two upper and lower projections 2a and 2b are formed on the inner surface of the side wall of the structural member 1 having a quadrangular cylindrical shape. Further, two mounting holes 3 are formed on the mounting surface of the structural member 1 so as to be separated from each other in the longitudinal direction of the structural member 1. On the other hand, the fastening member 10 has two bolts 13 fixed to a single plate 11 so as to be spaced apart in the longitudinal direction. A locking member 16 is fixed to the plate 11 between these bolts 13. Further, the pair of locking portions 18 of the locking member 16 extends from the base portion 17 so as to face in a direction perpendicular to the facing direction of the bolt 13.

  Since the length of the bolt 13 is smaller than the inner height of the hollow member 1 as shown in FIG. 13 (b), the fastening member 10 is the longitudinal length of the hollow structural member 1 as shown in FIG. 13 (b). Can be inserted in the direction. When the screw portion 15 of the fastening member 1 has moved to the position of the attachment hole 3, as shown in FIGS. 14 (a) and 14 (b), when the screw portion 15 is slightly pulled out from the attachment hole 3, The tip of the portion 18 gets over the projection 2a and is positioned between the projection 2a and the projection 2b, and the tip of the locking portion 18 cannot get over the projection 2a in the opposite direction. Thereby, the fastening member 10 is maintained in a state in which the screw portion 15 is slightly exposed from the structural member 1. In this state, the structural member 10 is stored and transported.

  At the time of fastening operation, as shown in FIGS. 15A and 15B, the screw portion 15 is further pulled out, and the distal end of the locking portion 18 is positioned below the lower projection 2b. As a result, the fastening member 10 cannot maintain the tip of the locking portion 18 over the lower protrusion 2b in the reverse direction, and is maintained in a state where the screw portion 15 is almost exposed to the outside of the structural member 1.

  Thereafter, as shown in FIGS. 16A and 16B, the screw portion 15 is inserted into the hole of the fastened member 30, and the nut 31 is screwed into the portion of the screw portion 15 exposed from the fastened member 30, The structural member 1 is fixed to the fastened member 30 by tightening the nut 31.

  In this way, as shown in FIG. 14, most of the fastening member 10 is stored in the hollow structural member 1 during storage and transportation. Since the screw portion 15 of the bolt 13 is slightly exposed to the outside of the structural member 1, as shown in FIG. 15, the screw portion 15 of the bolt 13 is gripped and pulled out to the end, and the fastening member 10 is The operation of setting the predetermined fastening processing position is easy. Further, at the time of fastening operation, as shown in FIG. 15, the tip end of the locking portion 18 is locked to the lower projection 2 b and does not get over the opposite direction, and most of the screw portion 15 is not structural member 1. It is held exposed outside. Therefore, the bolt 13 is prevented from entering the structural member 1 during the installation of the fastened member 30 and the screwing operation of the nut 31, and the workability is improved.

  Next, another embodiment of the present invention will be described with reference to FIG. In the present embodiment, a pair of engagement walls 6 are erected on the attachment surface of the structural member 1, and the attachment holes 3 are formed in the central attachment surface between the engagement walls 6. In the present embodiment, a locking member 40 is fixed to the bolt 23 of the fastening member 20, and the locking member 40 includes a base portion 41 and a locking portion 42 extending substantially vertically upward from the base portion 41. It is composed of Therefore, in the present embodiment, as shown in FIG. 17C, the interval between the outer surfaces of the locking portion 42 of the locking member 40 substantially matches the interval between the inner surfaces of the engagement wall 6.

  In the present embodiment configured as described above, as shown in FIG. 17A, when the fastening member 20 is lowered by inserting the tip end portion of the screw portion 25 into the hole 3, the locking member 40. The bent portion between the locking portion 42 and the base portion 41 contacts the protrusion 7 at the upper end of the engaging wall 6. Further, when the fastening member 20 is further lowered, the bent portion widens the protrusion 7 and deforms the engagement wall 6 so that its upper end portion is widened as shown in FIG. When the base portion 41 of the fastening member 10 contacts the inner surface of the mounting surface of the structural member 1, the length of the locking portion 42 is shorter than the distance between the projection 7 and the mounting surface of the structural member 1. The engagement wall 6 returns to a state perpendicular to the original mounting surface. Thereby, the upper end of the latching | locking part 42 of the latching member 40 is latched by the processus | protrusion 7, and the fastening member 30 is maintained in the state in which the screw part 25 was almost exposed. In this state, fastening work is performed. In the present embodiment, the cross-sectional shape of the structural member can be simplified, and by reducing the size of the plate and the locking member, the weight can be reduced and the installation workability can be improved.

1: structural members 2, 2a, 2b, 2c: projections 3, 3a, 3b: mounting holes 4, 4a, 4b, 4c: partition wall 6: engagement wall 7: projections 10, 20: fastening member 11: plate 12: Bolt insertion hole 13, 23: Bolt 14, 24: Head 15, 25: Screw part 16, 26: Locking member 17: Base part 18, 28: Locking part 18a, 18c, 18e: First part 18b, 18d, 18f: Part 2

Claims (5)

In a structural member with a fastening member provided with a fastening member for attaching a structural member formed into a rectangular tube shape by extrusion molding of an aluminum alloy to another member,
The structural member is
It has a hollow shape with a mounting hole through which a bolt is inserted into the mounting surface, and is inward on both inner side surfaces rising from both ends of the mounting surface or on the inner side surfaces of a pair of engaging walls erected on the mounting surface Protrusions projecting on are formed,
The fastening member is
A plate in which a bolt insertion hole is formed;
Bolts shorter than the distance between the inner surface of the wall provided with the mounting hole in the structural member and the facing surface thereof, the screw portion is inserted into the bolt insertion hole, and the head remains on the plate,
A plate-like locking member fixed separately or integrally with the plate,
The locking member is
The plate extends from both sides of the plate and abuts against the inner side surface of the structural member or the inner side surface of the engagement wall, and at the corner between the inner side surface of the structural member or the inner side surface of the engagement wall and the projection. It has a locking part that is locked and positions the bolt in the bolt insertion hole,
The locking part can get over the protrusion when the plate moves toward the mounting surface, but the plate is locked to the protrusion when the plate tries to move away from the mounting surface. shaped, the locking portion is Ri elastically deformable der for the portion on the plate of the locking member,
The fastening member is inserted into the hollow structural member in the longitudinal direction, and the screw portion moves to the position of the attachment hole,
The structural member with a fastening member , wherein the screw portion of the bolt protrudes from the mounting hole in a state before the locking portion gets over the protrusion . The locking member has a base portion that overlaps the plate, the locking portion extends from both ends of the base portion to both sides thereof, and the locking portion is bent at an obtuse angle with respect to the base portion. Therefore, the locking portion can be bent with respect to the base portion and get over the protrusion when the plate moves toward the mounting surface. The structural member with a fastening member according to claim 1, wherein the structural member is locked to the protrusion when moving in a direction away from the structural member. The structural member with a fastening member according to claim 1 or 2 , wherein a head portion of the bolt is fixed to the plate by welding or caulking. The structural member with a fastening member according to any one of claims 1 to 3 , wherein the locking member is made of metal or plastic. The structural member with a fastening member according to any one of claims 1 to 4 , wherein the structural member is a shape member made of an aluminum alloy.

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