JP3163580U - Relative displacement suppressor after centering and fastening when fastening device is fastened - Google Patents

Abstract

Fastening a fastening device having a function of facilitating centering when fastening a fastening device to improve fastening workability and suppressing a relative displacement between a fastening member and a fastened member in the direction perpendicular to the axis. Provided is a relative displacement suppressor after centering and fastening. In a fastening device in which fastened members (5, 6) facing each other in the axis C direction of a fastening member (4) comprising a fastening bolt (2) and a nut (3) are fastened by fastening of the fastening member (4), relative displacement suppression is performed. The distal end cylindrical portion 15a of the tool 15 is inserted into the bolt insertion hole 11 formed in the fastened member 5, and the shaft portion 8 of the fastening bolt 2 is inserted into the distal end cylindrical portion 15a so that the perpendicular displacement of the axis C is impossible. . [Selection] Figure 2

Description

  The present invention relates to a centering device for fastening a fastening device and a relative displacement suppressor after fastening. More specifically, a plurality of fastened members facing each other in the axial direction of a fastening member composed of fastening bolts and nuts are fastened. The fastening device fastened by fastening the member for use has a function of facilitating centering when fastening the fastening device and suppressing relative displacement in the direction perpendicular to the axis between the fastening member and the fastened member after fastening. The present invention relates to a relative displacement suppression tool after centering and fastening after fastening device fastening.

  Conventionally, as a fastening device in which a plurality of fastened members facing each other in the axial direction of a fastening member composed of fastening bolts and nuts are fastened by fastening of a fastening member, FIG. 9, FIG. 10, FIG. Various structures such as the structures shown in FIGS. 12, 13, 14 and 15, or other structures are known. The fastening devices shown in FIGS. 9, 10, 11 and 13 use flanged fastening bolts and flanged fastening nuts, omitting the use of washers, and the fastening devices shown in FIGS. Uses a fastening bolt with a flange, omits the use of a washer, and the fastening device shown in FIG. 15 uses a trimmed bolt and a fastening nut with a flange to eliminate the use of a washer.

  The fastening device 1 shown in FIGS. 9 and 10 includes a fastening member 5 and a fastening member 4 which are coupled to each other in the direction of the axis C of a fastening member 4 including a fastening bolt 2 and a fastening nut 3. The fastening member 6 includes the bolt axial force F generated in the shaft portion 8 of the fastening bolt 2 by fastening the fastening member 4, the seat surface 9 a of the head 9 of the fastening bolt 2, and the seat surface 3 a of the fastening nut 3. The fastening device 1 shown in FIG. 11 is fastened to the other fastened member 6 by welding using the fastening nut 3 as a welding nut. It is fixed.

  Further, the fastening device 1 shown in FIG. 12 is provided with a cylindrical portion 10 whose inner diameter is reduced from the lower side to the upper side by applying a combined process of shearing and bending by pressing to the other fastened member 6, By forming a female thread 10a on the inner peripheral surface of the cylindrical portion 10 by tapping, the cylindrical portion 10 has a function as a fastening nut 3, and the seating surface 9a of the head 9 of the fastening bolt 2 and the fastening nut 3 are provided. The fastened members 5 and 6 are fastened with the lower surface 6a of the other fastened member 6 corresponding to the seat surface 3a. The fastening device 1 shown in FIG. A member to be fastened between the seating surface 9a of the head 9 of the fastening bolt 2 and the seating surface 3a of the fastening nut 3 with an intermediate member 7 to be interposed between the other fastened member 6. 5 and 6 and an intermediate fastened member 7 are fastened.

  Further, the fastening device 1 shown in FIG. 14 has an intermediate fastened member 7 interposed between one fastened member 5 and another fastened member 6, and the other fastened member 6 A female screw 6b that functions as the fastening nut 3 is formed, and between the seating surface 9a of the head 9 of the fastening bolt 2 and the lower surface 6a of the other fastened member 6 corresponding to the seating surface 3a of the fastening nut 3. One fastened member 5 and an intermediate fastened member 7 are fastened.

On the other hand, in the fastening device 1 shown in FIG. 15, a cut-off bolt 2A that functions as a fastening bolt 2 is vertically joined to the lower surface 6a of another member to be fastened 6 by, for example, upset welding. A fastened member 5 and an intermediate fastened member 7 are fastened between the lower surface 6a of another fastened member 6 corresponding to the seating surface 9a of the portion 9 and the seating surface 3a of the fastening nut 3. is there.

  The fastening device 1 shown in FIGS. 9 to 11 is fastened by using a large-diameter bolt insertion hole 11 formed in one fastened member 5 as a bolt initial insertion hole, and a shaft portion of the fastening bolt 2 in the bolt insertion hole 11. 8 is inserted into the bolt insertion hole 11, and the large diameter bolt insertion hole 12 formed in the other member to be fastened 6 is used as a bolt final insertion hole. The shaft portion 8 is inserted, the end portion of the shaft is protruded from the other fastened member 6, and a fastening nut 3 including a welding nut is screwed into the shaft portion 8, and both the bolts 2 and 3 are tightened to a predetermined degree. The fastening device 1 shown in FIG. 12 is fastened by torque, and the fastening device 1 shown in FIG. 12 is formed with large-diameter bolt insertion holes 11a and 11b that are opposed to each other in the direction of the axis C in one fastened member 5. Insert the insertion hole 11a into the bolt initial insertion hole. Then, the shaft portion 8 of the fastening bolt 2 is inserted into the bolt insertion hole 11a, the bolt insertion hole 11b is used as the bolt final insertion hole, and the shaft portion 8 of the fastening bolt 2 is inserted into the bolt insertion hole 11b. The end portion is screwed into the female screw 10a of the cylindrical portion 10 functioning as the fastening nut 3, and the fastening bolt 2 is fastened with a predetermined tightening torque.

  Further, the fastening device 1 shown in FIG. 13 is fastened by using the large-diameter bolt insertion hole 11 formed in one fastened member 5 as a bolt initial insertion hole, and the shaft portion 8 of the fastening bolt 2 in the bolt insertion hole 11. After insertion, the shaft portion 8 of the fastening bolt 2 is inserted into the large-diameter bolt insertion hole 13 that is communicated with the bolt insertion hole 11 and formed in the intermediate fastened member 7, and then communicated with the bolt insertion hole 13. The large-diameter bolt insertion hole 12 formed in the other fastened member 6 is used as a bolt final insertion hole, the shaft portion 8 of the fastening bolt 2 is inserted into the bolt insertion hole 12, and the shaft end portion is This is done by a procedure of projecting from another member to be fastened 6 and screwing the fastening nut 3 therein to fasten both 2 and 3 with a predetermined tightening torque.

  Further, the fastening device 1 shown in FIG. 14 is fastened by using the large-diameter bolt insertion hole 11 formed in one fastened member 5 as a bolt initial insertion hole, and the shaft portion 8 of the fastening bolt 2 in the bolt insertion hole 11. After the insertion, the large-diameter bolt insertion hole 13 formed in the intermediate fastening member 7 in communication with the bolt insertion hole 11 is used as a bolt final insertion hole, and the shaft portion 8 of the fastening bolt 2 is inserted into the bolt insertion hole 13. Then, the shaft end is screwed into the female screw 6b of the other fastened member 6 functioning as the fastening nut 3, and the fastening bolt 2 is fastened with a predetermined tightening torque.

  Further, the fastening device 1 shown in FIG. 15 is fastened after the large bolt insertion hole 13 formed in the intermediate fastened member 7 is used as the bolt initial insertion hole and the cut bolt 2A is inserted into the bolt insertion hole 13. The large diameter bolt insertion hole 11 formed in one fastened member 5 in communication with the bolt insertion hole 13 is used as a bolt final insertion hole, and the shank bolt 2A is inserted into the bolt insertion hole 11, and the shaft end A part is protruded from one to-be-fastened member 5, the fastening nut 3 is screwed here, and both 2A and 3 are made | formed by the procedure of fastening with predetermined | prescribed tightening torque.

nothing special

  By the way, in the fastening apparatus 1 demonstrated in the said FIGS. 9-15, the to-be-fastened member 5 and the other one to-be-fastened member 6 are fastened only by the one fastening apparatus 1, or the intermediate to-be-fastened member 7 is interposed. Thus, there is no problem when one fastened member 5 and the other fastened member 6 are fastened. However, usually, a plurality of fastening devices 1 shown in FIGS. 9 to 15 are used individually, and each fastening device 1 is arranged at a predetermined interval, and one fastened member 5 and another fastened device are fastened. A fastening structure for fastening one member to be fastened 5 and another one fastened member 6 with an intermediate fastened member 7 interposed therebetween is adopted, or FIGS. By using the combined use of the fastening devices 1 shown as appropriate, the fastening devices 1 are arranged at a predetermined interval to fasten one fastened member 5 and another fastened member 6, A fastening structure is employed in which one member to be fastened 5 and another member to be fastened 6 are fastened with a member to be fastened 7 interposed.

  As an example, in order to increase the rigidity of the front subframe of an automobile having a front cross member and a pair of left and right side members, the planar shape of which is U-shaped, a rear cross is attached to the rear ends of the pair of left and right side members. A fastening structure in which both ends of the member and the reinforcing member are fastened at a plurality of locations, or a fastening structure in which the highly rigid front subframe is fastened to the main frame of the vehicle body at a plurality of locations.

  Thus, in the fastening structure in which a plurality of fastening devices 1 are arranged at a predetermined interval, centering is required when each fastening device 1 is fastened. For example, a plurality of fastening devices 1 shown in FIGS. 9 and 10 are used, and each fastening device 1 is arranged at a predetermined interval, so that one fastening member 5 and another one fastening member 6 are provided. In the fastening structure to be fastened at the place, the centering at the time of fastening of each fastening device 1 uses a plurality of large-diameter bolt insertion holes 11 formed at a predetermined interval in one fastened member 5 as bolt initial insertion holes, While the shaft portion 8 of the fastening bolt 2 is sequentially inserted into each of the plurality of bolt insertion holes 11, another member to be fastened corresponding to each of the plurality of bolt insertion holes 11 at each shaft end portion of the fastening bolt 2. The plurality of bolt insertion holes 12 formed in 6 are searched, and the shaft portions 8 of the respective fastening bolts 2 are sequentially inserted using the plurality of bolt insertion holes 12 thus detected as final insertion holes. Another one fastened member 6 It is projected, wherein the sequentially engaged temporary threaded fastening nut 3, after them, are made by the procedure for fastening the respective fastening nut 3 and the respective fastening bolt 2 with a predetermined tightening torque.

  That is, in the fastening structure in which a plurality of fastening devices 1 shown in FIGS. 9 and 10 are arranged at predetermined intervals, a plurality of final insertion holes are sequentially formed at the shaft end portions of the plurality of fastening bolts 2 at the time of centering. When a plurality of fastening devices 1 are used because the first troublesome work to be searched and the second troublesome work of sequentially screwing the shaft end portions of each of the plurality of fastening bolts 2 and the fastening nut 3 are necessary. The fastening workability is poor. In particular, in the fastening device 1 shown in FIG. 10, the distance between the bolt insertion hole 11 and the bolt insertion hole 12 in the direction of the axis C is increased, so that the first complicated operation is further complicated when centering.

  Further, in the fastening structure in which a plurality of fastening devices 1 shown in FIG. 11 are arranged at a predetermined interval, in the centering, the first and second complicated operations are performed immediately before the second complicated operation. In addition, a complicated pre-stage operation is required in which a plurality of fastening bolts 2 are sequentially searched for female threads of a fastening nut 3 made up of a plurality of welding nuts by respective shaft end portions.

  Furthermore, in the fastening structure in which a plurality of fastening devices 1 shown in FIG. 12 are arranged at a predetermined interval, the first complicated work in the first and second complicated work when the center is centered is a bolt. The distance between the insertion hole 11a and the bolt insertion hole 11b in the direction of the axis C is further complicated, and immediately before the second complicated operation, a plurality of cylindrical portions at the shaft end portions of the plurality of fastening bolts 2 are provided. A complicated pre-stage operation for sequentially searching for the ten female screws 10a is required.

  On the other hand, in the fastening structure in which a plurality of fastening devices 1 shown in FIG. 13 are arranged at a predetermined interval, each of the plurality of fastening bolts 2 is separated during the first and second complicated operations when centering. A third complicated operation is required in which the plurality of large-diameter bolt insertion holes 13 formed in the intermediate fastened member 7 at the shaft end portion are sequentially searched and inserted.

  Further, in the fastening structure in which a plurality of fastening devices 1 shown in FIG. 14 are arranged at a predetermined interval, each of the plurality of fastening bolts 2 is separated during the first and second complicated operations when centering. A third complicated operation for sequentially searching and inserting a plurality of large-diameter bolt insertion holes 13 formed in the intermediate fastened member 7 at the shaft end portion is required immediately before the second complicated operation. In addition, a complicated pre-stage operation for sequentially searching for the plurality of female screws 6b at the shaft end portions of the plurality of fastening bolts 2 is required.

  Further, in the fastening structure in which a plurality of fastening devices 1 shown in FIG. 15 are arranged at a predetermined interval, the first, second, and third complicated operations are required for centering.

  That is, a plurality of conventional fastening devices 1 shown in FIG. 9 to FIG. 15 are individually used, and each fastening device 1 is arranged at a predetermined interval, and one fastened member 5 and another fastened member. In the fastening structure in which one fastened member 5 and the other fastened member 6 are fastened with an intermediate fastened member 7 interposed therebetween, the first, second, and third parts are arranged at the time of centering. Therefore, there is a problem that the fastening workability is poor. Further, by using a combination of the conventional fastening devices 1 as appropriate, the fastening devices 1 are arranged at a predetermined interval, and one fastened member 5 and another fastened member 6 are fastened. In the case of a fastening structure in which one fastened member 5 and another fastened member 6 are fastened with an intermediate fastened member 7 interposed therebetween, the above-described troublesome work is combined when centering. Fastening workability becomes worse.

  Therefore, for example, fastening work done to increase the rigidity of the front subframe of the automobile by fastening the rear cross members and both ends of the reinforcing member to the rear ends of the pair of left and right side members described above at a plurality of locations, It can be said that the fastening workability such as the fastening work of fastening the highly rigid front subframe to the main frame of the vehicle body at a plurality of locations is poor.

  On the other hand, as in the fastening device 1 shown in FIGS. 9 to 15, the bolt axial force F generated in the shaft portion 8 of the fastening bolt 2 including the trimmed bolt by fastening the fastening member 4, and the head of the fastening bolt 2. 9 between the seating surface 9a of 9 and the seating surface 3a of the fastening nut 3 including the welding nut and the lower surface 6a of the other fastening member 6 corresponding to the seating surface 3a. In the fastening structure that is fastened by the generated compression force P or the fastening force P generated by the fastened members 5 and 6 and the fastened member 7 in the middle, the bolt axial force is immediately after fastening that is fastened by a predetermined fastening torque. As F and the compression force P are balanced with each other, the direction of the fastening bolt 2 that is generated between the fastening bolt 2, the fastened members 5, 6 and the intermediate fastened member 7 is perpendicular to the axis C (each of the above drawings). In the horizontal direction) That.

  However, when an external force such as vibration fluctuates for a long time and is loaded on each fastening device 1, for example, a load screw surface (not shown) in the fastening member 4, a seating surface 9 a of the fastening bolt head 9, and a fastening nut 3 has a local sag on the uneven surface formed during processing of the seating surface 3a, the contact surfaces of the fastened members 5 and 6 and the intermediate fastened member 7, and tightens as the sag progresses. The length decreases and the compression force P decreases. Moreover, since the inner diameters of the bolt insertion holes 11, 12, and 13 are set sufficiently larger than the outer diameter of the shaft portion 8 of the fastening bolt 2, the fastening member 4 and the fastened members 5, 6, 7 are fastened after fastening. In addition, there is a risk that relative displacement in the direction orthogonal to the axis C of the fastening member 4 (drawing, relative displacement in the left-right direction) occurs.

  Therefore, for example, a fastening device for fastening the rear cross member or both ends of the reinforcing member to the rear ends of the pair of left and right side members described above at a plurality of locations, and a highly rigid front sub-frame are installed on the main frame of the vehicle body. However, even in a fastening device that is fastened at a plurality of locations, there is a risk of relative displacement in the direction orthogonal to the axis of the fastening member between the fastening member and the fastened member over time after fastening.

  The present invention has been made in view of the above circumstances, and facilitates centering when fastening devices are fastened to improve fastening workability, and the direction orthogonal to the axis between the fastening member and the fastening member after fastening. It aims at provision of the relative displacement suppression tool after centering at the time of fastening of the fastening device provided with the function which controls the relative displacement of and fastening.

In order to achieve the above-mentioned object, the relative displacement suppression tool after centering and fastening at the time of fastening device fastening according to the present invention is a plurality of fastened members facing each other in the axial direction of a fastening member comprising fastening bolts and nuts. However, in the fastening device fastened by fastening the fastening member, the centering at the time of fastening of the fastening device and the fastening device that suppresses the relative displacement in the direction orthogonal to the axis between the fastening member after fastening and the fastened member are fastened. A relative displacement suppressor after centering and fastening,
The bolt initial insertion hole formed in the fastened member and the bolt final insertion hole formed in communication with the bolt initial insertion hole are fitted into at least one bolt insertion hole and tightened. A front end cylindrical portion that passes through the shaft portion of the bolt so that it cannot be displaced at right angles to the axis, and a flange portion that is continuously extended in diameter at the rear end portion of the front end cylindrical portion and seats the head seat surface or the nut seat surface of the fastening bolt;
It is characterized by having.

  According to the above-described configuration, the front end cylinder portion of the relative displacement suppression tool after the centering and fastening at the time of fastening device fastening is inserted into at least one of the bolt initial insertion holes and the bolt final insertion holes, The center portion is automatically centered by inserting the shaft portion of the fastening bolt into the tip tube portion so as not to be displaced at right angles to the axis. For this reason, the first and third complicated operations and complicated previous work required for the conventional fastening device for centering are not required, so that centering is facilitated and fastening workability can be improved. it can.

  In addition, according to the above configuration, since the centering is automatically performed, it is possible to fasten the fastening member that omits the second complicated work required in the conventional fastening device. In addition, the fastening workability can be improved.

  Furthermore, according to the said structure, when external forces, such as a vibration, are fluctuate | varied and loaded for a long time, for example, the load screw surface in a fastening member, the seat surface of a fastening bolt head, the seat surface of a fastening nut, and a to-be-fastened Local sag occurs in the minute irregularities created during processing of the contact surface between the member and the intermediate fastened member, and the tightening length decreases due to the progress of this sag, and the compression force slightly decreases. Even if the end tube portion inserted through the shaft portion of the fastening bolt so as not to be displaced at right angles to the axis is inserted into at least one of the bolt initial insertion hole and the bolt final insertion hole, Since the difference between the outer diameter of the shaft portion and the inner diameter of at least one of the bolt insertion holes is absorbed, it is possible to suppress relative displacement between the fastening member after fastening and the fastened member in the direction orthogonal to the axis. It is.

  The centering at the time of fastening of the fastening device according to the present invention and the relative displacement suppression tool after fastening are configured such that the surface of the distal end tubular portion is a tapered surface that decreases in diameter from the proximal end portion on the flange portion side toward the distal end. Is desirable. According to this, it is possible to easily insert the tip tube portion into at least one of the bolt initial insertion hole and the bolt final insertion hole.

  The relative displacement suppression tool after centering and fastening at the time of fastening device fastening according to the present invention has a surface opposite to the surface on which the head seat surface or nut seat surface of the fastening bolt of the flange portion is seated. It is desirable that the fastened member and the other fastened member are seated on the surface of at least one of the fastened members. According to this, centering at the time of fastening device fastening and stability after fastening become good.

  The relative displacement suppressor after centering and fastening at the time of fastening device fastening according to the present invention eliminates the need for the first and third complicated operations and the complicated pre-stage work required by the conventional fastening device for centering. As a result, centering can be facilitated and fastening workability can be improved, and automatic centering eliminates the second troublesome work required for conventional fastening devices. Since the fastening member can be tightened, the fastening workability can also be improved by this, and the tip tube part inserted through the shaft part of the fastening bolt so as not to be displaced at right angles to the axis is the bolt initial insertion hole and the bolt final stage. By inserting into at least one of the bolt insertion holes, the difference between the outer diameter of the bolt shaft and the inner diameter of the at least one bolt insertion hole is absorbed. By being, it is possible to suppress the axial orthogonal direction of the relative displacement between the fastening member and the fastening member after the fastening.

FIG. 3 is a half-sectional view showing, in an enlarged manner, an embodiment of a relative displacement suppression tool after centering and fastening after fastening device according to the present invention. It is a front view showing a 1st embodiment of a fastening device to which the present invention is applied, partly in section. It is a front view which shows 2nd Embodiment of the fastening device to which this invention is applied, and shows a partial cross section. It is a front view which shows 3rd Embodiment of the fastening device to which this invention is applied, and shows a partial cross section. It is a front view which shows 4th Embodiment of the fastening device to which this invention is applied, and shows a partial cross section. It is a front view which shows 5th Embodiment of the fastening device to which this invention is applied, and shows a partial cross section. It is a front view which shows 6th Embodiment of the fastening device to which this invention is applied, and shows a partial cross section. It is a front view which shows 7th Embodiment of the fastening device to which this invention is applied, and shows a partial cross section. It is a front view which shows the 1st prior art example of a fastening device in a partial cross section. It is a front view which shows the 2nd prior art example of a fastening device in a partial cross section. It is a front view which shows the 3rd prior art example of a fastening device in a partial cross section. It is a front view which shows the 4th prior art example of a fastening device in a partial cross section. It is a front view which shows the 5th prior art example of a fastening device in a partial cross section. It is a front view which shows the 6th prior art example of a fastening device in a partial cross section. It is a front view which shows the 7th prior art example of a fastening device in a partial cross section.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a centering and fastening relative displacement suppressor after fastening according to the present invention and a preferred embodiment of a fastening device to which the present invention is applied will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same part as the conventional fastening apparatus demonstrated in the said FIGS. 9-15, and the overlapping structure description is abbreviate | omitted.

  FIG. 1 is an enlarged half-sectional view showing an embodiment of a relative displacement suppressing tool after centering and fastening at the time of fastening of a fastening device according to the present invention, and FIG. 2 is a first view of a fastening device to which the present invention is applied. It is a front view showing the embodiment in a partial cross section, in these figures, centering at the time of fastening device fastening and relative displacement suppression tool 15 (hereinafter referred to as relative displacement suppression tool 15) after fastening, It is made of stainless steel, and includes a front end tube portion 15a and a flange portion 15b that is continuously extended in diameter at the rear end portion of the front end tube portion 15a and seats the seating surface 9a of the head 9 in the fastening bolt 2. The surface of the distal end cylindrical portion 15a is formed by a tapered surface that decreases in diameter from the proximal end portion on the flange portion 15b side toward the distal end.

  As shown in FIG. 2, the relative displacement suppression tool 15 is inserted into a large-diameter bolt insertion hole 11 that functions as an initial bolt insertion hole formed in a single fastened member 5, and the flange portion 15 a The portion 15b is seated on the lower surface of one member 5 to be fastened, and the shaft portion 8 of the fastening bolt 2 is inserted through the tip tube portion 15a so as not to be displaced at right angles to the axis.

  In this manner, the distal end cylinder portion 15a of the relative displacement suppression tool 15 is fitted into the large-diameter bolt insertion hole 11 functioning as a bolt initial insertion hole formed in one fastened member 5, and the flange portion 15b is connected to one flange portion 15b. While being seated on the lower surface of the member 5 to be fastened, the shaft portion 8 of the fastening bolt 2 is inserted into the tip tube portion 15a so as not to be displaced at right angles to the center, thereby automatically centering. For this reason, the first and third complicated operations and complicated previous work required for the conventional fastening device for centering are not required, so that centering is facilitated and fastening workability can be improved. it can.

  In addition, since the centering is automatically performed, it is possible to fasten the fastening member that omits the second complicated work required by the conventional fastening device. Can be improved.

  Further, when external force such as vibration is fluctuated and loaded for a long period of time, for example, a load screw surface (not shown) in the fastening member 4, a seating surface 9 a of the fastening bolt head 9, and a seating surface 3 a of the fastening nut 3. In addition, a local sag occurs in the minute unevenness formed during processing of the contact surfaces of the members 5 and 6 to be fastened, the tightening length is reduced by the progress of this sag, and the compression force P is slightly increased. Even if it is lowered, the outer end of the bolt shaft portion 8 and the bolt insertion are inserted by inserting the tip tube portion 15a inserted through the shaft portion 8 of the fastening bolt 2 so as not to be displaced at right angles to the axis into the large-diameter bolt insertion hole 11. Since the difference with the inner diameter of the hole 11 is absorbed, it is possible to suppress the relative displacement between the fastening member 4 after fastening and the fastened members 5 and 6 in the direction perpendicular to the axis C.

  FIG. 3 is a front view showing a second embodiment of a fastening device to which the present invention is applied, partially in cross section. In the second embodiment shown in FIG. 3, a pair of relative displacement suppression tools 15 are used in an up-and-down direction, and a bolt initial stage in which a distal end cylindrical portion 15 a of the lower relative displacement suppression tool 15 is formed on one fastened member 5 is used. It is inserted into a large-diameter bolt insertion hole 11 that functions as an insertion hole, and its flange portion 15b is seated on the lower surface of one member 5 to be fastened, and the shaft portion 8 of the fastening bolt 2 is perpendicular to the axial end portion 15a. While being inserted so as not to be displaceable, the distal end cylindrical portion 15a of the upper relative displacement suppression tool 15 is fitted into a large-diameter bolt insertion hole 12 functioning as a bolt final insertion hole formed in the other fastened member 6. The flange portion 15b is seated on the upper surface of another member to be fastened 6, and the shaft portion 8 of the fastening bolt 2 is inserted into the tip tube portion 15a so as not to be displaced at right angles to the axis.

  Even in the second embodiment having such a configuration, the same operational effects as those of the first embodiment can be obtained, and even if the distance between the bolt insertion hole 11 and the bolt insertion hole 12 in the axis C direction is large, it is automatically performed. When the centering is performed, the fastening member 4 can be fastened without the first complicated work required by the conventional fastening device, and the fastening workability can be improved.

  FIG. 4 is a front view showing a third embodiment of a fastening device to which the present invention is applied with a partial cross section. The difference between the third embodiment shown in FIG. 4 and the first embodiment shown in FIG. 2 is that a welding nut fixed to the upper surface of another member to be fastened 6 is applied as the fastening nut 3. The third embodiment having such a configuration can also provide the same operational effects as the first embodiment.

  FIG. 5 is a front view showing a fourth embodiment of a fastening device to which the present invention is applied, partially in cross section. In the fourth embodiment shown in FIG. 5, the relative displacement suppression tool 15 is inserted into a large-diameter bolt insertion hole 11 a that functions as an initial bolt insertion hole formed in one fastened member 5. In addition, the flange portion 15b is seated on the lower surface of one fastened member 5, and the shaft portion 8 of the fastening bolt 2 is inserted through the tip tube portion 15a so as not to be displaced at right angles to the axis.

  The fourth embodiment having such a configuration can achieve the same effects as those of the first embodiment, and even if the distance between the bolt insertion hole 11a and the bolt insertion hole 11b in the axis C direction is large, the automatic operation is automatically performed. Thus, the centering operation is not required, and the complicated work for searching for the female screw 10a of the cylindrical portion 10 required in the conventional fastening device is not required, and the fastening workability can be improved.

  FIG. 6 is a front view showing a fifth embodiment of a fastening device to which the present invention is applied, partially in cross section. In the fifth embodiment shown in FIG. 6, as in the second embodiment of FIG. 3, a pair of relative displacement suppression tools 15 are used by being vertically distributed.

  The fifth embodiment having such a configuration can achieve the same effects as those of the first embodiment, and a plurality of large diameters formed on the intermediate fastened member 7 at the shaft end of the fastening bolt 2. The 3rd complicated operation | work which searches the bolt insertion hole 13 and penetrates becomes unnecessary, and a fastening workability | operativity can be improved.

  FIG. 7 is a front view showing a sixth embodiment of a fastening device to which the present invention is applied, partially in cross section. In the sixth embodiment shown in FIG. 7, the relative displacement suppression tool 15 is inserted into a large-diameter bolt insertion hole 11 a that functions as an initial bolt insertion hole formed in one fastened member 5. In addition, the flange portion 15b is seated on the lower surface of one fastened member 5, and the shaft portion 8 of the fastening bolt 2 is inserted through the tip tube portion 15a so as not to be displaced at right angles to the axis.

  In the sixth embodiment having such a configuration, the same operational effects as those of the first embodiment can be obtained, and, similar to the fifth embodiment of FIG. The third complicated operation of finding and inserting the large-diameter bolt insertion hole 13 formed in the fastening member 7 is not necessary, and the complicated first-stage operation of searching for the female screw 6b at the shaft end portion of the fastening bolt 2 is also possible. It becomes unnecessary and can improve fastening workability.

  FIG. 8 is a front view showing a seventh embodiment of a fastening device to which the present invention is applied, partially in cross section. In the seventh embodiment shown in FIG. 8, the relative displacement suppression tool 15 is inserted into a large-diameter bolt insertion hole 11 a that functions as an initial bolt insertion hole formed in one fastened member 5. In addition, the flange portion 15b is seated on the lower surface of one fastened member 5, and the threaded bolt 2A is inserted through the distal end cylindrical portion 15a so as not to be displaced at right angles to the axis. The seventh embodiment having such a configuration can also provide the same operational effects as those of the first embodiment.

  Since the relative displacement suppression tool 15 according to the present invention is configured with a tapered surface whose diameter decreases from the proximal end portion on the flange portion 15b side toward the distal end, the surface of the distal end cylindrical portion 15a functions as an initial bolt insertion hole. It is possible to easily insert the tip tube portion 15a into at least one of the bolt insertion holes 11 of the bolt insertion hole 11 and the bolt insertion hole 12 functioning as a bolt final insertion hole.

  In addition, the relative displacement suppression tool 15 according to the present invention has one surface to be fastened to the surface opposite to the surface on which the head 9 seating surface 9a of the fastening bolt 2 of the flange portion 15b or the seating surface 3a of the fastening nut 3 is seated. Since the member 5 and the other fastened member 6 are seated on the surface of at least one of the fastened members, the opposite surface is connected to one fastened member 5 and another fastened member. The centering at the time of fastening of the fastening device 1 and the stability after fastening are better than the configuration in which the fastening member 6 is slightly separated from the surface of at least one of the fastened members.

  The descriptions of the first to seventh embodiments are only descriptions and drawings of preferred specific examples of the present invention, and do not limit the scope of claims for utility model registration of the present invention. A person skilled in the art having ordinary knowledge in the field can appropriately make changes and improvements, but it can be said that these embodiments fall within the technical scope claimed by the present invention.

  In order to increase the rigidity of the front sub-frame of an automobile having a front cross member and a pair of left and right side members and having a U-shaped planar shape, the rear cross member and the reinforcing member are disposed at the rear ends of the pair of left and right side members. It is suitable for a fastening structure that fastens the both ends of the body at a plurality of locations, or a fastening structure that fastens the highly rigid front subframe to the main frame of the vehicle body at a plurality of locations.

DESCRIPTION OF SYMBOLS 1 Fastening device 2 Fastening bolt 2A Cut-off bolt 3 Fastening nut 3a Seat surface 4 Fastening member 5 One fastened member 6 Another fastened member 7 Intermediate fastened member 8 Shaft part 9 Fastening bolt shaft 9 Head portion 9a Seat surface 10 Cylindrical portion 10a Female thread 11 Bolt insertion hole (initial bolt insertion hole)
12 Bolt insertion hole (Bolt end insertion hole)
13 Bolt insertion hole (Bolt end insertion hole)
15 Relative Displacement Suppression Tool 15a End Tube 15b Flange

Claims (3)

In a fastening device in which a plurality of fastened members facing each other in the axial direction of a fastening member made up of fastening bolts and nuts are fastened by fastening the fastening member, for centering at the time of fastening of the fastening device and fastening after fastening A relative displacement suppression tool after centering and fastening at the time of fastening device fastening which suppresses relative displacement in the direction perpendicular to the axis of the member and the fastened member,
The bolt initial insertion hole formed in the fastened member and the bolt final insertion hole formed in communication with the bolt initial insertion hole are fitted into at least one bolt insertion hole and tightened. A front end cylindrical portion that passes through the shaft portion of the bolt so that it cannot be displaced at right angles to the axis, and a flange portion that is continuously extended in diameter at the rear end portion of the front end cylindrical portion and seats the head seat surface or the nut seat surface of the fastening bolt;
A relative displacement suppression tool after centering and fastening after fastening device. In the relative displacement suppression tool after centering and fastening after fastening device according to claim 1,
A surface of the distal end cylindrical portion is a tapered surface that is reduced in diameter from a proximal end portion on the flange portion side toward the distal end. In the relative displacement suppression tool after centering and fastening after fastening device according to claim 1,
The surface opposite to the surface on which the head seat surface or the nut seat surface of the fastening bolt of the flange portion is seated is at least one of the one fastened member and the other fastened member. A relative displacement suppression tool after centering and fastening after fastening device seated on the surface of a member.

Images