JP2014066257A - Supporting shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of a component to which a supporting shaft is attached, without increasing a cost, when the supporting shaft is prevented from slipping-off by caulking.SOLUTION: A supporting shaft 4 includes an outer pipe 4a, and an inner rod material 4b inserted in the outer pipe 4a. The outer pipe 4a is disposed between a left board 11 and a right board 12 of a bracket 2. The inner rod material 4b includes a left side caulking portion 4c is inserted in a notch portion 11h of the left board 11, and projecting out from the notch portion 11h; and a right side caulking portion 4d inserted in a notch portion 12h of the right board 12, and projecting out from the notch portion 12h. The left side caulking portion 4c and the right side caulking portion 4d are caulked.

Description

  The present invention relates to a support shaft that supports, for example, an operation pedal for an automobile.

  2. Description of the Related Art Conventionally, as disclosed in Patent Document 1, for example, an operation pedal support structure configured to release an operation pedal from a vehicle body at the time of a frontal collision of the vehicle is known as a vehicle operation pedal supported on the vehicle body. It has been.

  The operation pedal support structure includes a bracket for supporting the operation pedal, a rotation lever for rotating the front pedal at the time of a frontal collision to release the operation pedal from the bracket, a support shaft for supporting the rotation lever on the bracket, and the like. Has been. A rotating lever is disposed between both side plates of the bracket, and the support shaft passes through the rotating lever and the side plate of the bracket. Caulking is known as a method for preventing the attached spindle from coming off. When caulking, first, the end portion of the support shaft protrudes outward from the side plate of the bracket, and then the protruding end portion is caulked. As a result, the end portion of the support shaft engages with the bracket to prevent the support shaft from coming off.

JP 2012-83858 A

  However, when the end portion of the support shaft is caulked, the machining force acts on both side plates of the bracket, which may cause deformation of the bracket. In order to prevent this, it is conceivable to form a step on the outer peripheral surface near the end of the support shaft. That is, a step is provided such that the caulking portion at the axial end portion of the support shaft has a small diameter and the intermediate portion in the axial direction has a large diameter, and the peripheral portion of the support shaft through hole of the side plate of the bracket is fitted into the step. Thereby, even if a processing force acts on the side plate of the bracket, it is possible to suppress the deformation because the side plate is fitted in the step.

  However, how to form such a step on the outer peripheral surface of the support shaft becomes a problem. For example, when it is formed by general machining, the cost increases.

  The present invention has been made in view of such a point, and the object of the present invention is to prevent the cost of the support shaft from rising when the end portion of the support shaft is clamped to prevent it from coming off. And it is in preventing the deformation | transformation of the member of the other party to which a spindle is attached.

  In order to achieve the above object, the present invention has a configuration including a cylindrical member and a rod-shaped member inserted into the cylindrical member, the end of the rod-shaped member is projected from the cylindrical member, and the protruding portion is It was made to caulk.

1st invention is attached to the 1st support shaft attaching part and 2nd support shaft attaching part which the 1st member has mutually separated, and the support shaft which supports the 2nd member to the 1st member in the above,
A cylindrical first spindle component,
A rod-shaped second support shaft constituent member inserted into the first support shaft constituent member and having a length set so as to protrude from an end of the first support shaft constituent member;
The first support shaft constituent member is disposed between the first support shaft mounting portion and the second support shaft mounting portion,
One end portion of the second support shaft component member is inserted into a first insertion portion formed in the first support shaft mounting portion, and from the first insertion portion to the side opposite to the second support shaft mounting portion. A protruding first caulking portion is formed,
The first caulking portion is caulked.

  According to this configuration, in the state where the first support shaft constituent member is disposed between the first support shaft mounting portion and the second support shaft mounting portion of the first member, The first caulking portion protrudes from the first insertion portion when the first insertion portion and the first support shaft constituting member are inserted from the one support shaft attaching portion side. If the first caulking portion is caulked in this state, a machining force acts on the first support shaft mounting portion. At this time, since the processing force can be received by the first support shaft constituent member disposed between the first support shaft mounting portion and the second support shaft mounting portion, the first support shaft mounting portion and the second support shaft. Deformation of the attachment portion is suppressed.

According to a second invention, in the first invention,
The other end portion of the second support shaft component member is inserted into a second insertion portion formed in the second support shaft mounting portion, and is opposite to the first support shaft mounting portion from the second insertion portion. A second caulking portion protruding to
The second caulking portion is caulked.

  According to this configuration, the second caulking portion protrudes from the second insertion portion, and when the second caulking portion is caulked in this state, a machining force acts on the second support shaft mounting portion. . At this time, since the processing force can be received by the first support shaft constituent member disposed between the first support shaft mounting portion and the second support shaft mounting portion, the first support shaft mounting portion and the second support shaft. Deformation of the attachment portion is suppressed.

According to a third invention, in the first or second invention,
The first support shaft constituent member is made of a material having higher strength than that of the material forming the second support shaft constituent member.

  According to this configuration, the first support shaft constituent member has higher strength than the second support shaft constituent member, and therefore a working force is applied when the first caulking portion and the second caulking portion are caulked. In some cases, it becomes more difficult to deform.

According to a fourth invention, in any one of the first to third inventions,
The second support shaft constituent member is made of a material that is easy to extend as compared to the material constituting the first support shaft constituent member.

  According to this configuration, the second support shaft constituent member is more easily stretched when a force is applied than the first support shaft constituent member, so that when the first caulking portion and the second caulking portion are caulked. Good workability.

According to a fifth invention, in any one of the first to fourth inventions,
The first support shaft constituent member is formed by molding a plate material into a cylindrical shape.

  According to this configuration, for example, the plate material is formed so that the inner diameter of the first support shaft constituent member is slightly smaller than the outer diameter of the second support shaft constituent member, and then the second support shaft constituent member is moved to the first support member. When inserted into the support shaft constituent member, the end portion of the plate member is deformed so that the butted portion is slightly opened, and insertion of the second support shaft constituent member is allowed. Therefore, it is possible to prevent the second support shaft constituent member from rattling in the radial direction with respect to the first support shaft constituent member.

  According to 1st invention, it inserts in the inside of the cylindrical 1st spindle component member arrange | positioned between a 1st spindle attachment part and a 2nd spindle attachment part, and a 1st spindle component member. Since the first caulking portion is provided at the end of the second support shaft constituent member in combination with the rod-shaped second support shaft constituent member, when the support shaft is prevented from being detached by caulking, the outer peripheral surface of the support shaft is The deformation of the first support shaft mounting portion and the second support shaft mounting portion can be suppressed at low cost without machining the step.

  According to the second aspect of the present invention, when the second caulking portion is provided on the second support shaft constituent member and both ends of the second support shaft constituent member are caulked, the first support shaft attaching portion and the second support portion are inexpensively processed. A deformation | transformation of a spindle attaching part can be suppressed.

  According to the third invention, since the strength of the material of the first support shaft constituent member is higher than that of the second support shaft constituent member, the processing force when caulking the first caulking portion and the second caulking portion is increased. It is possible to prevent further deformation when acting.

  According to the fourth invention, it is possible to improve the workability when the first caulking part and the second caulking part are caulked, and it is possible to prevent the occurrence of cracks in both the caulking parts.

  According to the fifth aspect of the invention, the plate material is formed into a cylindrical shape to constitute the first support shaft constituent member, so that it is possible to suppress the shakiness in the radial direction of the second support shaft constituent member. Further, since the plate material is simply formed into a cylindrical shape, the cost can be reduced.

It is a left view of the operation pedal support structure provided with the spindle concerning embodiment. It is a disassembled perspective view of an operation pedal support structure. It is the III-III sectional view taken on the line of FIG. 1, (a) shows before caulking process, (b) shows after caulking process. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1, (a) shows before caulking, and (b) shows after caulking. (A) is a front view of the spindle concerning an embodiment, and (b) is an exploded view of a spindle. It is explanatory drawing which shows the example of the crimping processing method. It is a perspective view of the outer side pipe concerning a modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows an operation pedal support structure 1 having a support shaft according to an embodiment of the present invention. The operation pedal support structure 1 is provided, for example, on the driver's seat side in the passenger compartment of a passenger car or a freight transport vehicle, and when the vehicle collides with an obstacle from the front side (at the time of a front collision), This is to relieve the impact force applied to the lower limbs.

  In the description of the embodiment, the front side of the vehicle is simply referred to as “front”, the rear side of the vehicle is simply referred to as “rear”, the left side in the vehicle width direction is simply referred to as “left”, and the right side in the vehicle width direction is simply “right”. Let's say.

  First, the structure of the vehicle will be described. The vehicle is provided with a dash panel P that divides the passenger compartment R and a portion ahead of the passenger compartment R (engine room E). The dash panel P is made of a steel plate extending in the vertical direction. A floor panel (not shown) constituting the floor of the passenger compartment R is connected to the lower edge of the dash panel P.

  Next, the operation pedal support structure 1 will be described. As shown in FIGS. 1 and 2, the operation pedal support structure 1 supports a bracket 2, a brake pedal 3 as an operation pedal operated by a driver, and the brake pedal 3 so as to be swingable in the vehicle front-rear direction. A pedal support shaft 4, a first rotation lever 6, a lever support shaft 7 that rotatably supports the first rotation lever 6 on the bracket 2, and a pair of left and right first attached to the first rotation lever 6. 2 rotation levers 8 and 9 (refer to FIG. 2 and FIG. 3) and a lock pin 10 for locking the second rotation levers 8 and 9 in a normal state. Note that the normal time is a normal driving time until the vehicle collides forward. The vehicle is provided with an instrument panel reinforcing member 5 (shown only in FIG. 1).

  The bracket 2 is attached to the dash panel P and has a shape extending rearward from the dash panel P. As shown in FIG. 2, the bracket 2 includes a left plate 11, a right plate 12, and a front plate 14 that connects the front portions of the left plate 11 and the right plate 12.

  The left plate 11 includes a main body portion 11a extending substantially vertically in the vertical direction, and a flange portion 11b extending to the left from the front edge portion of the main body portion 11a. The main body portion 11a and the flange portion 11b are formed of a steel plate. Are integrally formed by pressing. A lever support shaft insertion hole 11c through which the lever support shaft 7 is inserted is formed on the rear side of the main body portion 11a.

  A lock pin insertion hole 11e through which the lock pin 10 is inserted is formed on the upper front side of the main body 11a. As shown in FIG. 1, the lock pin insertion hole 11 e is a substantially oval shape that is long in the front-rear direction. The front part of the lock pin insertion hole 11e is expanded upward as compared with the rear part. The inner diameter of the rear portion of the lock pin insertion hole 11 e is set slightly larger than the outer diameter of the lock pin 10. Therefore, the lock pin 10 is movable in the front-rear direction from the rear edge portion to the front edge portion of the lock pin insertion hole 11e in a state of being inserted through the lock pin insertion hole 11e. Moreover, when the lock pin 10 is located in the front side part of the lock pin insertion hole 11e, it can move also to an up-down direction.

  As shown in FIG. 2, a notch 11h for detachably attaching the brake pedal 3 is formed between the lever support shaft insertion hole 11c and the lock pin insertion hole 11e at the lower edge of the main body 11a. Yes. The notch 11h has a substantially U shape that opens downward.

  The right plate 12 has substantially the same structure as the left plate 11, and the left plate 11 and the right plate 12 have a substantially symmetrical shape on the left and right. Therefore, the right plate 12 also has a lever support shaft insertion hole 12c, a lock pin insertion hole 12e, and a notch 12h.

  The front plate 14 is fixed to the lower portion of the left plate 11 and the lower portion of the right plate 12 and extends downward from the left plate 11. The front plate 14 is formed by pressing a steel plate in the same manner as the left plate 11 and the like.

  As shown in FIG. 1, the instrument panel reinforcing member 5 is a high-strength member made of a steel pipe extending in the left-right direction. The left end portion of the instrument panel reinforcing member 5 is fixed to the left front pillar (not shown) of the vehicle body, and the right end portion is fixed to the right front pillar (not shown) of the vehicle body. The instrument panel reinforcing member 5 is arranged above the bracket 2 and away from the rear.

  The instrument panel reinforcing member 5 is provided with a protruding member 5a protruding forward at a portion corresponding to the position where the brake pedal 3 is disposed. A contact surface 5b extending substantially in the vertical direction is provided at the front end of the protruding member 5a. Although the details will be described later, the upper surface of the first rotation lever 6 comes into contact with the contact surface 5b at the time of a front collision.

  As shown in FIG. 2, the 1st rotation lever 6 is arrange | positioned between the left board 11 and the right board 12 of the bracket 2, and is an integrally molded article formed by pressing a steel plate. The first rotating lever 6 includes a left side plate portion 6 a that extends substantially vertically along the left plate 11 and a right side plate portion 6 b that extends substantially vertically along the right plate 12.

  The left side plate portion 6a has a substantially triangular shape in a side view, and is formed so that its bottom side extends in a substantially horizontal posture. A left insertion hole 6d through which the lever support shaft 7 is inserted is formed in the vicinity of the apex on the lower rear side of the left side plate portion 6a.

  A notch 6f into which the lock pin 10 is inserted is formed in the vicinity of the apex on the lower front side of the left side plate 6a. The notch 6f has a substantially U shape that opens forward. The upper edge part of the notch part 6f is formed so that it may be located so that it may go to the front side (open side of the notch part 6f). Therefore, the width of the notch 6f becomes wider toward the front side. The width of the notch 6f is set to be slightly wider than the outer diameter of the lock pin 10 at the narrowest rear end.

  A protrusion 6j that protrudes obliquely upward toward the rear side is formed on the upper portion of the first rotation lever 6. As shown in FIG. 1, the protrusion 6j and the contact surface 5b of the instrument panel reinforcing member 5 are opposed to each other in the front-rear direction.

  The right side plate portion 6b has the same structure as the left side plate portion 6a. Accordingly, the right side plate portion 6b also has a right insertion hole 6h through which the lever support shaft 7 is inserted and a notch portion (not shown) into which the lock pin 10 is inserted.

  As shown in FIG. 2, an insertion hole 8 a through which the pedal support shaft 4 is inserted is formed in the vicinity of the central portion in the front-rear direction of the left second rotation lever 8. The second turning lever 8 is formed with a front notch 8e into which the lock pin 10 is inserted. The front notch 8e has a substantially U shape that opens forward. The width of the front notch 8e is set slightly wider than the outer diameter of the lock pin 10. The front cutout portion 8e and the cutout portion 6f of the first rotation lever 6 coincide with each other. The left second turning lever 8 is connected to the left plate 6 a of the first turning lever 6 by a left connecting pin 30.

  The second rotating lever 9 on the right side is configured in the same manner as the second rotating lever 8 on the left side, and an insertion hole 9a (shown in FIG. 3) through which the pedal support shaft 4 is inserted and a front notch (not shown). have. The right second rotation lever 9 is connected to the right plate portion 6b of the first rotation lever 6 by a right connection pin 31 (shown in FIG. 2).

  Further, the left and right second rotating levers 8 and 9 are provided with engaging portions 8d (only the left side is shown) that engage with the first rotating lever 6.

  The brake pedal 3 includes bushes 22 and 22 and a sleeve 23. The sleeve 23 is provided at the upper end portion of the brake pedal 3 and extends in the left-right direction. The bushes 22 and 22 are fitted inside the sleeve 23.

  As shown in FIG. 5, the pedal support shaft 4 that supports the brake pedal 3 includes an outer pipe (first support shaft constituent member) 4 a and a hollow inner bar (second support shaft constituent member) 4 b. I have. As shown in FIG. 3, the outer pipe 4a is formed, for example, by molding STKM 12C material into a cylindrical shape. The outer pipe 4 a is disposed between the left plate (first support shaft mounting portion) 11 and the right plate (second support shaft mounting portion) 12 of the bracket (first member) 2. In this state, the inner hole of the outer pipe 4a is positioned inside the notch 11h of the left plate 11 and the notch 12h of the right plate 12 when viewed in the axial direction. Further, both end surfaces of the outer pipe 4a are in contact with the peripheral edge of the insertion hole 8a of the left second rotation lever 8 and the peripheral edge of the insertion hole 9a of the right second rotation lever 9, respectively. An intermediate portion of the outer pipe 4 a passes through the bushes 22, 22 of the brake pedal (second member) 3.

  The inner bar 4b is formed, for example, by forming a STKM 12A material into a cylindrical shape. The STKM 12C material constituting the outer pipe 4a is a material having a higher tensile strength than the STKM 12A material constituting the inner bar 4b. Further, the STKM 12A material has a higher elongation (%) than the STKM 12C material. Accordingly, the outer pipe 4a is made of a material having higher strength than the material constituting the inner bar 4b, and the inner bar 4b is made of a material that is easily stretched compared to the material constituting the outer pipe 4a. It is configured. The above-described material is an example, and other materials can be used.

  The outer diameter of the inner bar 4b is set slightly smaller than the inner diameter of the outer pipe 4a, and the inner bar 4b can be easily inserted into the inner hole of the outer pipe 4a. Further, in a state where the inner bar 4b is inserted into the inner hole of the outer pipe 4a, the inner bar 4b hardly touches the outer pipe 4a in the radial direction.

  The length of the inner bar 4b is set so as to protrude from both ends of the outer pipe 4a while being inserted into the inner hole of the outer pipe 4a. The outer diameter of the inner bar 4b is slightly smaller than the insertion hole 8a of the left second rotation lever 8 and the insertion hole 9a of the right second rotation lever 9.

  The left and right ends of the inner bar 4b are inserted into a notch (first insertion part) 11h of the left plate 11 and a notch (second insertion part) 12h of the right plate 12, respectively. The left end portion of the inner bar 4b is a left caulking portion 4c that protrudes from the cutout portion 11h of the left plate 11 to the left side (the side opposite to the right plate 12). The left caulking portion 4c is caulked and fixed to the peripheral edge portion of the notch portion 11f of the left plate 11 by a known caulking method. The right end portion of the inner bar 4b is a right caulking portion 4d that protrudes from the cutout portion 12h of the right plate 12 to the right side (the side opposite to the left plate 12). The right caulking portion 4d is caulked and fixed to the peripheral edge portion of the notch portion 12f of the right plate 12 by a known caulking method.

  In other words, the pedal support shaft 4 is attached to the left plate 11 and the right plate 12 which are separated from each other, and is for supporting the brake pedal 3 on the bracket 2.

  As shown in FIG. 4, the lever support shaft 7 is configured similarly to the pedal support shaft 4, and includes an outer pipe 7a and a hollow inner bar 7b. The materials of the outer pipe 7a and the inner bar 7b are the same as those of the pedal support shaft 4. The outer pipe 7 a is disposed between the left plate (first support shaft mounting portion) 11 and the right plate (second support shaft mounting portion) 12 of the bracket (first member) 2. In this state, the inner hole of the outer pipe 7a is positioned inward of the lever support shaft insertion hole 11c of the left plate 11 and the lever support shaft insertion hole 12c of the right plate 12 when viewed in the axial direction. Yes. Further, the left end surface of the outer pipe 7a is in contact with the peripheral portion of the lever support shaft insertion hole 11c of the left plate 11, and the right end surface is in contact with the peripheral portion of the lever support shaft insertion hole 12c of the right plate 12. The intermediate portion of the outer pipe 7a passes through the left insertion hole 6d and the right insertion hole 6h of the first rotation lever (second member) 6.

  The left and right ends of the inner bar 7b are inserted into the lever support shaft insertion hole (first insertion portion) 11c of the left plate 11 and the lever support shaft insertion hole (second insertion portion) 12c of the right plate 12, respectively. The left end portion of the inner bar 7b is a left caulking portion 7c that protrudes from the lever support shaft insertion hole 11c of the left plate 11 to the left side (the side opposite to the right plate 12). The left caulking portion 7c is caulked and fixed to the peripheral edge portion of the lever support shaft insertion hole 11c of the left plate 11. Further, the right end portion of the inner bar 7b is a right caulking portion 7d that protrudes from the lever support shaft insertion hole 12c of the right plate 12 to the right side (the side opposite to the left plate 12). The right caulking portion 7d is caulked and fixed to the peripheral edge portion of the lever support shaft insertion hole 12c of the right plate 12.

  Next, the assembly procedure of the operation pedal support structure 1 will be described.

  First, the first rotating lever 6 and the left and right second rotating levers 8 and 9 are connected by the left and right connecting pins 30 and 31. The connection pins 30 and 31 are only used to integrate the first rotation lever 6 and the left and right second rotation levers 8 and 9 in a normal state. When the shearing force acts on the connecting pins 30 and 31 by moving, the connecting pins 30 and 31 are configured so as to be cut.

  Then, the outer pipe 7 a of the lever support shaft 7 is inserted into the left insertion hole 6 d and the right insertion hole 6 h of the first rotation lever 6. Then, the 1st rotation lever 6 and the 2nd rotation levers 8 and 9 on either side are put between the left board 11 and the right board 12 of the bracket 2 with the outer side pipe 7a.

  The lever support shaft insertion hole 11 c of the left plate 11 and the left insertion hole 6 d of the first rotation lever 6 are aligned, and the lever support shaft insertion hole 12 c of the right plate 12 and the right insertion hole 6 h of the first rotation lever 6. Then, the inner rod 7b of the lever support shaft 7 is inserted into the lever support shaft insertion hole 11c, the outer pipe 7a, and the lever support shaft insertion hole 12c. As a result, the first rotation lever 6 is supported by the bracket 2 so as to be rotatable around the lever support shaft 7.

  Further, the lock pin 10 is inserted into the left and right lock pin insertion holes 11 e (only the left one is shown) of the bracket 2. At this time, the lock pin 10 is inserted into the left and right cutouts 6f of the first rotation lever 6 (only the left one is shown), and the front cutouts 8e of the second rotation levers 8 and 9 (only the left one is shown). ). Then, the lock pin 10 is disposed on the rear side of the lock pin insertion hole 11 e of the bracket 2. As a result, the front sides of the first rotation lever 6 and the left and right second rotation levers 8 and 9 are both supported by the lock pin 10 and are prevented from rotating in the vertical direction.

  The brake pedal 3 is attached to the bracket 2. That is, the bushes 22 and 22 are inserted into the sleeve 23, and the outer pipe 4 a of the pedal support shaft 4 is inserted into the bushes 22 and 22. Then, the sleeve 23 is inserted between the left plate 11 and the right plate 12 of the bracket 2. At this time, the inner hole of the outer pipe 4 a is aligned with the notch 11 h of the left plate 11 and the notch 12 h of the right plate 12 of the bracket 2.

  Thereafter, the inner bar 4b of the pedal support shaft 4 is inserted from the left side of the bracket 2, for example, into the notch 11h, the outer pipe 4a, and the right notch 12h.

  The pedal support shaft 4 and the lever support shaft 7 are attached to the bracket 2 by caulking. As shown in FIG. 6A, first, caulking tools 101 and 102 are prepared. In FIG. 6, the pedal support shaft 4 is shown, and other members are omitted.

  The caulking tools 101 and 102 are respectively formed with convex surface portions 101a and 102a inserted into the left caulking portion 4c and the right caulking portion 4d of the inner bar 4b of the pedal support shaft 4. The convex surface portions 101a and 102a are tapered. By inserting these convex surface portions 101a and 102a into the left caulking portion 4c and the right caulking portion 4d of the inner bar 4b, the left caulking portion 4c and the right caulking portion 4d are expanded in diameter as shown in FIG. The left plate 11 is in pressure contact with the peripheral portion of the notch 11h of the left plate 11 and the notch 12h of the right plate 12. Thereby, the pedal support shaft 4 is fixed by caulking. At this time, since the inner bar 4b is made of a material having a high elongation rate, the left caulking portion 4c and the right caulking portion 4d are not cracked.

  During the caulking process, when the left caulking portion 4c and the right caulking portion 4d are pressed against the peripheral portions of the notch portion 11h of the left plate 11 and the notch portion 12h of the right plate 12, the left plate 11 and the right plate 12 approach each other. Although it is going to deform | transform, the outer side pipe 4a of the pedal spindle 4 is arrange | positioned between the left board 11 and the right board 12, and the outer side pipe 4a acts so that the left board 11 and the right board 12 may be supported from the inner side. . At this time, since the outer pipe 4a is made of a material having high strength, buckling deformation does not occur, and therefore deformation of the left plate 11 and the right plate 12 is suppressed.

  The same applies when caulking the inner bar 7b of the lever support shaft 7. Also in this case, the deformation of the left plate 11 and the right plate 12 is suppressed by the outer pipe 7a.

  The caulking tools 101 and 102 may have the shapes shown in FIGS. In the case shown in FIG. 6B, the slopes of the convex portions 101a and 102a are gentler than those shown in FIG. Further, in the case shown in (c), the convex surface portions 101a and 102a are shaped like protrusions, and flat surfaces 101b and 102b are formed around them. In the case shown in (d), the molding surface is composed of curved surfaces 101c and 102c. The types of the caulking tools 101 and 102 and the caulking method are not limited to those described above.

  The bracket 2 to which each member is assembled as described above is attached to the dash panel P. In the attached state shown in FIG. 1, the protruding portion 6 j of the first rotation lever 6 faces the contact surface 5 b of the instrument panel reinforcing member 5.

  Next, the operation of the operation pedal support structure 1 configured as described above will be described. First, the normal brake operation will be described. In normal times, even if the brake pedal 3 is depressed, the brake pedal 3 only rotates around the pedal support shaft 4, and the first rotation lever 6 and the second rotation lever. No force acts on 8 and 9 and they do not rotate.

  Next, the front collision will be described. When the vehicle collides forward, the dash panel P moves backward due to the deformation of the vehicle body, and the bracket 2 moves backward accordingly. On the other hand, since the instrument panel reinforcing member 5 is fixed to a pillar different from the dash panel P, it hardly retreats.

  When the bracket 2 moves backward, the protruding portion 6j of the first rotation lever 6 contacts the contact surface 5b of the instrument panel reinforcing member 5, and is pushed forward by the contact surface 5b.

  When the protrusion 6j of the first rotation lever 6 is pushed forward, the first rotation lever 6 tries to rotate around the lever support shaft 7. At this time, since the second rotating levers 8 and 9 are fixed to the bracket 2 together with the pedal 3, a shearing force acts on the left and right connecting pins 30 and 31. The left and right connecting pins 30 and 31 that have received the shearing force are cut.

  At the same time, the first rotation lever 6 starts to rotate forward around the lever support shaft 7, and the upper edge of the notch 6 f hits the lock pin 10. Since the upper edge of the notch 6f extends obliquely upward toward the front, a force acts on the lock pin 10 toward the front. As a result, the lock pin 10 moves to the front part of the lock pin insertion hole 11e. When the lock pin 10 moves to the front side, the lock pin 10 comes out of the notch 6f of the first turning lever 6 and also comes out of the rear notch 8e of the second turning levers 8 and 9. As a result, there is no thing that prevents the first rotation lever 6 and the second rotation levers 8 and 9 from rotating.

  The first rotating lever 10 is rotated by a certain amount while rotating so that the front side of the first rotating lever 10 moves downward around the lever supporting shaft 7 (counterclockwise in FIG. 1). Hit the sleeve 23 and push the sleeve 23 down firmly. Then, the pedal support shaft 4 moves downward in the notches 11h and 12h of the bracket 2 and falls downward from the notches 11h and 12h, whereby the brake pedal 3 is detached from the bracket 2.

  The lower side of the brake pedal 3 can be largely moved forward by the release of the brake pedal 3, whereby the impact force applied to the driver's lower limb is alleviated.

  As described above, according to this embodiment, the outer pipe 4a disposed between the left plate 11 and the right plate 12 of the bracket 2 and the inner bar 4b inserted into the outer pipe 4a are provided. The pedal support shaft 4 is configured in combination, and the left caulking portion 4c and the right caulking portion 4d are provided at both ends of the inner bar 4b. Therefore, when the pedal support shaft 4 is prevented from being detached by caulking, the pedal support shaft The deformation of the left plate 11 and the right plate 12 can be suppressed at a low cost without machining a step on the outer peripheral surface of 4. The same applies to the lever support shaft 7.

  Further, since the strength of the material of the outer pipes 4a and 7a is made higher than that of the inner bars 4b and 7b, when the working force is applied when the left caulking portions 4c and 7c and the right caulking portions 4d and 7d are caulked. In addition, the deformation of the left plate 11 and the right plate 12 of the bracket 2 can be reliably prevented.

  Further, since the inner bars 4b and 7b are made of a material having a high elongation rate, it is possible to improve the workability when the left caulking portions 4c and 7c and the right caulking portions 4d and 7d are caulked. It is possible to prevent cracks and the like from occurring in the portions 4c and 7c and the right caulking portions 4d and 7d.

  The outer pipe 4a of the pedal support shaft 4 and the outer pipe 7a of the lever support shaft 7 may be electric sewing pipes, or a plate material formed into a cylindrical shape as in the modification shown in FIG. There may be. According to this modification, for example, the plate material is formed so that the inner diameter of the outer pipe 4a is slightly smaller than the outer diameter of the inner bar 4b, and then the inner bar 4b is inserted into the outer pipe 4a. The butted portion of the end portion is deformed so as to be slightly opened, and insertion of the inner bar 4b is allowed. Therefore, it is possible to prevent the inner bar 4b from rattling in the radial direction with respect to the outer pipe 4a.

  Further, the support shafts 4 and 6 according to the present invention can be applied to support various members other than the operation pedal support structure 1.

  In the above embodiment, the caulking portions 4 c and 4 d are provided at both ends of the inner rod 4 b of the pedal support shaft 4, and the caulking portions 7 c and 7 d are provided at both ends of the inner rod 7 b of the lever support shaft 7. However, the present invention is not limited to this, and a caulking portion may be provided only at one end of the inner bars 4b and 7b.

  Moreover, in the said embodiment, although the inner side bar 4b of the pedal support shaft 4 and the inner side bar 7b of the lever support shaft 7 are formed in hollow, you may form not only this but solid.

  Further, the caulking method is not limited to the above-described method, and various methods can be used.

  As described above, the support shaft according to the present invention can be applied to an operation pedal support structure of an automobile, for example.

1 Operation pedal support structure 2 Bracket (first member)
3 Brake pedal 4 Pedal support shaft 4a Outer pipe (first support shaft component)
4b Inner bar (second spindle component)
4c Left side caulking part (first caulking part)
4d Right caulking part (second caulking part)
6 first rotation lever 7 lever support shaft 7a outer pipe (first support shaft component)
7b Inside bar (second spindle component)
7c Left side caulking part (first caulking part)
7d Right side caulking part (second caulking part)
8,9 2nd rotation lever 11 Left plate (1st spindle attaching part)
11h Notch (first insertion part)
12 Right plate (2nd spindle mounting part)
12h Notch (second insertion part)

Claims (5)

In the support shaft that is attached to the first support shaft mounting portion and the second support shaft mounting portion that are separated from each other and that the first member has, and supports the second member on the first member,
A cylindrical first spindle component,
A rod-shaped second support shaft constituent member inserted into the first support shaft constituent member and having a length set so as to protrude from an end of the first support shaft constituent member;
The first support shaft constituent member is disposed between the first support shaft mounting portion and the second support shaft mounting portion,
One end portion of the second support shaft component member is inserted into a first insertion portion formed in the first support shaft mounting portion, and from the first insertion portion to the side opposite to the second support shaft mounting portion. A protruding first caulking portion is formed,
The support shaft, wherein the first caulking portion is caulked. The support shaft according to claim 1,
The other end portion of the second support shaft component member is inserted into a second insertion portion formed in the second support shaft mounting portion, and is opposite to the first support shaft mounting portion from the second insertion portion. A second caulking portion protruding to
The support shaft, wherein the second caulking portion is caulked. In the support shaft according to claim 1 or 2,
The first support shaft constituting member is made of a material having higher strength than the material constituting the second support shaft constituting member. In the spindle according to any one of claims 1 to 3,
The support shaft according to claim 1, wherein the second support shaft constituent member is made of a material that is easy to extend as compared to a material constituting the first support shaft constituent member. In the support shaft according to any one of claims 1 to 4,
The first support shaft constituent member is formed by molding a plate material into a cylindrical shape.

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