JP6582732B2 - Wiper device - Google Patents

Description

  The present invention relates to a wiper device mounted on a vehicle or the like.

  Conventionally, in a wiper device, a pair of pivot levers each having a pivot shaft attached thereto are connected by a synchronous link rod, and a drive source side link rod connected to a drive source such as a motor is provided on one side. Some are connected to a pivot lever. In such a wiper device, the driving force of the motor transmitted to one pivot lever via the drive source side link rod is also transmitted to the other pivot lever via the synchronous link rod. When the pair of pivot levers and the pair of pivot shafts are reciprocally rotated within a predetermined angle range by the driving force of the motor, the wiper connected to the tip of each pivot shaft is reciprocated and winded by the wiper. The shield glass is wiped away.

  By the way, the drive source side link rod and the synchronous link rod can rotate relative to one pivot lever to which these link rods are connected, for example, via the ball pin described in Patent Document 1 Connected to the lever. The ball pin described in Patent Document 1 includes a first ball pin portion having a first ball portion having a spherical shape, a pin portion having an axial shape protruding from the first ball portion, and a second ball portion having a spherical shape. And a second ball pin portion. A ball hole penetrating the second ball portion is formed in the second ball pin portion. In order to mount the ball pin on the pivot lever, first, the pin portion of the first ball pin portion is inserted into the mounting hole formed in the pivot lever. Then, the pin portion penetrating the mounting hole is inserted into the ball hole of the second ball pin portion. Thereafter, the portion of the pin portion that protrudes from the ball hole is caulked at the end of the second ball portion opposite to the first ball portion, that is, at one end of the ball hole in the penetrating direction. Thus, the first ball pin portion and the second ball pin portion are integrated, and the ball pin is attached to the pivot lever. And a drive source side link rod is connected to any one of a 1st ball part and the 2nd ball part so that rolling is possible, and a synchronous link rod is connected so that it can roll to any one.

Japanese Examined Patent Publication No. 63-47928

  As described above, in the ball pin described in Patent Document 1, the tip portion protruding from the ball hole in the pin portion for attaching the ball pin to the pivot lever is the end opposite to the first ball portion in the second ball portion. It is the structure which crimps by the part, ie, the one end side of a ball hole. Therefore, when the tip part of the pin part is caulked, a load may be applied radially outward from the pin part plastically deformed by caulking. Then, there is a possibility that the second ball part expands radially outward and the roundness of the second ball part is lowered. When the link rod (drive source side link rod or synchronous link rod) connected to the second ball portion rotates relative to the pivot lever, the link rod connected to the second ball portion moves relative to the second ball portion. Slide. Therefore, when the roundness of the second ball portion decreases, when the link rod connected to the second ball portion slides with respect to the second ball portion, the link rod is connected to the second ball portion. There is a risk of local wear (uneven wear).

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a wiper device capable of mounting a ball pin on a pivot lever while suppressing deformation of the ball portion.

A wiper device that solves the above problems is mounted on a first pivot lever for rotating a first pivot shaft, a second pivot lever for rotating a second pivot shaft, and the first pivot lever. A ball pin, a first link rod connected to the first pivot lever via the ball pin and transmitting a driving force of a driving source to the first pivot lever, and connected to the first pivot lever via the ball pin And a second link rod for transmitting the driving force transmitted to the first pivot lever to the second pivot lever, wherein the first pivot lever has a mounting hole, and the ball pin includes the first pin. And a first ball portion to which one of the second link rods is connected, a cylindrical first pin portion penetrating the mounting hole, and the first ball portion and the first pin portion. A first ball pin portion having a sandwiching portion that abuts against the first pivot lever, a second ball portion to which one of the first and second link rods is coupled, and the first pin portion A second ball pin portion having a second pin portion disposed on the inner side, and the first pin portion is connected to an end portion of the first pin portion opposite to the sandwiching portion with the sandwiching portion. The first pivot lever is sandwiched therebetween, and a caulking portion is disposed between the first pivot lever and the inner side .

According to this configuration, with the second pin portion disposed inside the first pin portion and the first pin portion penetrating the mounting hole, the end portion of the first pin portion opposite to the sandwiching portion is covered. When the caulking portion is formed, the first pivot lever is clamped by the caulking portion and the clamping portion, and the second pin portion is clamped by the caulking portion and the inside of the first pin portion . Thereby, the first ball pin portion and the second ball pin portion are caulked and fixed to the first pivot lever. Therefore, it is possible to attach the ball pin to the first pivot lever without applying a force to the first ball portion or the second ball portion. Accordingly, when the ball pin is attached to the first pivot lever, the roundness of the first ball portion and the second ball portion is suppressed from being reduced, and the roundness of the first ball portion and the second ball portion is reduced. Maintained.

  In the wiper device, relative rotation about the axis of the ball pin between the first ball pin portion and the first pivot lever is provided on at least one of the outer peripheral surface of the first pin portion and the inner peripheral surface of the mounting hole. It is preferable that the 1st rotation prevention part which suppresses is provided.

  According to this configuration, the relative rotation of the first ball pin portion and the first pivot lever around the axis of the ball pin is suppressed by the first detent suppressing portion. Therefore, noise caused by relative rotation between the first ball pin portion and the first pivot lever and wear of the first ball pin portion or the first pivot lever can be suppressed.

  In the wiper device, at least one of the inner peripheral surface of the first pin portion and the outer peripheral surface of the second pin portion is around the axis of the ball pin between the first ball pin portion and the second ball pin portion. It is preferable that the 2nd rotation prevention part which suppresses relative rotation of is provided.

  According to this configuration, the relative rotation around the axis of the ball pin between the first ball pin portion and the second ball pin portion is suppressed by the second detent portion. Therefore, it is possible to suppress the occurrence of noise and wear due to the relative rotation between the first ball pin portion and the second ball pin portion.

In the wiper apparatus, it is preferable that the second ball pin portion has a small diameter portion smaller in diameter than the second pin portion between the second ball portion and the second pin portion.
According to this configuration, when the caulking portion is formed, it is possible to suppress the jig for forming the caulking portion from coming into contact with the second ball portion. Therefore, it becomes easier to form the caulking portion.

  According to the wiper device of the present invention, the ball pin can be attached to the pivot lever while suppressing deformation of the ball portion.

It is a top view of the wiper device of an embodiment. It is sectional drawing of the ball pin vicinity in the wiper apparatus of embodiment. It is a disassembled perspective view of the ball pin in an embodiment. (A)-(c) is a perspective view for demonstrating the process of mounting | wearing the pivot pin with the ball pin in embodiment. It is a disassembled perspective view of the ball pin of another form. It is a disassembled perspective view of the ball pin of another form. It is a disassembled perspective view of the ball pin of another form. It is a disassembled perspective view of the ball pin of another form. It is a disassembled perspective view of the ball pin of another form. It is a disassembled perspective view of the ball pin of another form.

Hereinafter, an embodiment of the wiper device will be described.
As shown in FIG. 1, the wiper device 10 includes a pair of pivot holders (that is, a first pivot holder 11 and a second pivot holder 12). The first and second pivot holders 11 and 12 are cast products made of, for example, an aluminum alloy. The first pivot holder 11 includes a substantially cylindrical pivot support portion 11a, a vehicle body fixing portion 11b extending in a direction substantially perpendicular to the axis of the pivot support portion 11a, and an axis orthogonal to the pivot support portion 11a at a position different from the vehicle body fixing portion 11b. A mounting shaft 11c extending in the direction, and a water receiving tray portion 11d extending in the shape of a plate outward in the radial direction of the pivot support portion 11a. The second pivot holder 12 has the same configuration as the first pivot holder 11. That is, the second pivot holder 12 includes a substantially cylindrical pivot support portion 12a, a vehicle body fixing portion 12b extending in a direction substantially orthogonal to the pivot support portion 12a, and the pivot support portion 12a at positions different from the vehicle body fixing portion 12b. A mounting shaft 12c extending in the direction perpendicular to the axis and a water receiving tray portion 12d extending in the shape of a plate outward in the radial direction of the pivot support portion 12a are provided. Note that the tray portions 11d and 12d may be configured as separate resin parts and attached and fixed to the pivot support portions 11a and 12a.

  A first pivot shaft 21 is inserted into the pivot support portion 11a, and the first pivot shaft 21 is rotatably supported by the pivot support portion 11a. Further, a second pivot shaft 22 that is paired with the first pivot shaft 21 is inserted into the pivot support portion 12a, and the second pivot shaft 22 is rotatably supported by the pivot support portion 12a. And the wiper which is not shown in figure is fixed to the front-end | tip of the 1st and 2nd pivot shafts 21 and 22, respectively. A first pivot lever for rotating the first pivot shaft 21 is fixed to the base end of the first pivot shaft 21 so as to be integrally rotatable with the first pivot shaft 21. Further, a second pivot lever 24 for rotating the second pivot shaft 22 is fixed to the base end of the second pivot shaft 22 so as to be integrally rotatable with the second pivot shaft 22. The first and second pivot levers 23 and 24 have a substantially rectangular plate shape. The first and second pivot shafts 21 and 22 are fixed to one end portions of the first and second pivot levers 23 and 24 in the longitudinal direction.

  Anti-vibration rubbers 19 and 20 are attached to the front ends of the vehicle body fixing portions 11b and 12b. The vehicle body fixing portions 11b and 12b are fastened and fixed by bolts (not shown) to mounting brackets (not shown) provided on the vehicle body side through the vibration isolating rubbers 19 and 20. The mounting shafts 11c and 12c are formed in a substantially circular solid cross section, and a plurality of caulking concave portions 11e and 12e are formed on the outer peripheral surface thereof.

  In addition, the wiper device 10 includes a hollow frame 13 that connects the first pivot holder 11 and the second pivot holder 12. The hollow frame 13 is formed from, for example, a hollow material (pipe) made of a galvanized steel plate. The hollow frame 13 includes a pair of connection fixing portions 13a and 13b to which the mounting shafts 11c and 12c are fixed, and a drive source fixing portion 13c for connecting the pair of connection fixing portions 13a and 13b. After the mounting shafts 11c and 12c are inserted into the connecting and fixing portions 13a and 13b, the portions corresponding to the caulking concave portions 11e and 12e in the connecting and fixing portions 13a and 13b are caulked, thereby caulking the connecting and fixing portions 13a and 13b. It is fixed. Further, the drive source fixing portion 13c is bent with respect to the coupling fixing portions 13a and 13b, whereby the base end direction of the pivot shafts 21 and 22 with respect to the pivot shafts 21 and 22 (in the depth direction in FIG. 1). Is arranged. Furthermore, a flat intermediate surface portion 13d is formed on the outer peripheral surface of the drive source fixing portion 13c. The two pivot holders 11 and 12 of the present embodiment are fixed to the hollow frame 13, and the axis of the pair of pivot shafts 21 and 22 supported by the pivot holders 11 and 12 mounts the wiper device 10. The distance between the pivot shafts 21 and 22 is set to be slightly separated depending on the curvature of the windshield of the vehicle.

  A motor 14 that is a drive source of the wiper device 10 is fixed to the drive source fixing portion 13c. The motor 14 includes a motor main body 14a and a gear portion 14b. A mounting leg 14d is formed on the housing 14c of the gear portion 14b. The mounting feet 14d are placed on the intermediate flat surface portion 13d and fastened and fixed to the driving source fixing portion 13c with bolts (not shown), whereby the motor 14 is fixed to the driving source fixing portion 13c. Further, a support pin (not shown) is integrally formed on the housing 14c on the opposite side of the mounting leg 14d in the housing 14c of the gear portion 14b, and a support rubber member 14e is attached to the support pin. The support rubber member 14e is attached to and supported by a mounting portion (not shown) on the vehicle body side. That is, the integrated body composed of the two pivot holders 11 and 12, the hollow frame 13 and the motor 14 of the present embodiment is composed of the two pivot holders 11 and 12 (vehicle body fixing portions 11b and 12b) and the motor 14 (support rubber member 14e). It is supported with respect to the vehicle body at three locations.

  Further, the output shaft 14f that protrudes from the housing 14c of the gear portion 14b in the motor 14 is set so as to protrude in substantially the same direction as the first and second pivot shafts 21 and 22 (the front side in FIG. 1). Yes. A crank arm 14g that rotates integrally with the output shaft 14f is fixed to the output shaft 14f.

  A ball pin 31 is fixed to the tip of the crank arm 14g, and the drive source side link rod 15 is connected to the crank arm 14g via the ball pin 31. The drive source side link rod 15 has a rod shape, and a resin ball receiving portion 15a having a cap shape is provided at a base end portion thereof (that is, an end portion in the longitudinal direction on the crank arm 14g side). The drive source side link rod 15 is connected to the ball pin 31 so that the ball receiving portion 15a provided at the base end portion of the drive source side link rod 15 can roll, so that the drive source side link rod 15 can rotate relative to the crank arm 14g. It is connected. As shown in FIGS. 1 and 2, the proximal end of the drive source side link rod 15 is located at the distal end of the drive source side link rod 15 (that is, the longitudinal end opposite to the crank arm 14 g). A resin ball receiving portion 15b having a cap shape similar to that of the ball receiving portion 15a provided on the rim is provided. The drive source side link rod 15 is connected to a ball pin 32 mounted on the first pivot lever 23 in such a manner that a ball receiving portion 15b provided at the tip of the link rod 15 can roll. It is connected with respect to 23 so that relative rotation is possible.

  The first pivot lever 23 is penetrated in the thickness direction of the first pivot lever 23 at the end opposite to the end to which the first pivot shaft 21 is fixed out of both longitudinal ends of the first pivot lever 23. A mounting hole 23a is formed. The mounting hole 23 a is a hole for mounting the ball pin 32 to the first pivot lever 23.

  As shown in FIGS. 2 and 3, the ball pin 32 includes two parts, a first ball pin portion 40 and a second ball pin portion 50. The first ball pin portion 40 and the second ball pin portion 50 have a shape in which a plurality of portions each having a set diameter are arranged coaxially and connected to each other, and have a substantially cylindrical shape as a whole. The 1st ball pin part 40 and the 2nd ball pin part 50 are manufactured by forging (cold forging), for example.

  The first ball pin portion 40 includes a first ball portion 41 having a spherical shape, a first columnar portion 42 having a column shape protruding from the first ball portion 41, and a sandwiching portion formed integrally with the first columnar portion 42. 43 and a first pin portion 44 formed integrally with the clamping portion 43.

  The first ball portion 41 has a pair of first flat portions 41a and 41b that are parallel to each other at both ends in the diameter direction (vertical direction in FIG. 2). Therefore, the first ball portion 41 has a spherical shape with both ends in the diametrical direction missing. In addition, the outer surface 41c of the first ball part 41 has a spherical shape. In the present embodiment, the diameter (maximum outer diameter) of the first ball portion 41 is set to a value larger than the diameter of the mounting hole 23a.

  The first columnar portion 42 protrudes from one first flat portion 41b (the upper first flat portion 41b in FIG. 2) of the pair of first flat portions 41a and 41b of the first ball portion 41. The first columnar portion 42 of the present embodiment has a cylindrical shape, and its central axis (see the alternate long and short dash line in FIG. 2) is orthogonal to the first flat portion 41b. In addition, the diameter of the first columnar portion 42 is smaller than the diameter (maximum outer diameter) of the first ball portion 41 and further smaller than the diameter of the mounting hole 23a.

  The clamping part 43 is integrally formed at the end of the first columnar part 42 opposite to the first ball part 41. The clamping part 43 has a disk shape with a diameter larger than that of the mounting hole 23a. The sandwiching portion 43 is formed to have a larger diameter than the first columnar portion 42, and the outer peripheral edge portion of the sandwiching portion 43 protrudes radially outward from the first columnar portion 42 to form a bowl shape. That is, the first columnar part 42 has a smaller diameter than the clamping part 43. Further, the outer peripheral edge portion of the sandwiching portion 43 (that is, the portion having a bowl shape in the sandwiching portion 43) faces in the opposite direction to the first ball portion 41 and the first columnar portion 42, and the axial direction of the sandwiching portion 43 (FIG. 2). A contact surface 43a having a planar shape perpendicular to the vertical direction is formed. The contact surface 43a is provided along the outer peripheral edge of the clamping part 43, and has an annular shape.

  The first pin portion 44 protrudes from the inner side of the abutting surface 43 a of the clamping portion 43 to the opposite side of the first ball portion 41. The first pin portion 44 has a cylindrical shape. The diameter (outer diameter) of the first pin portion 44 is formed to be equal to or slightly larger than the diameter of the mounting hole 23a. The cylindrical outer peripheral surface of the first pin portion 44 is a first knurled surface 45 that has been knurled. On the other hand, the inner peripheral surface of the first pin portion 44 has a smooth cylindrical shape that does not have irregularities due to knurling or the like. It should be noted that a sandwiching surface 43b having a planar shape perpendicular to the central axis of the sandwiching portion 43 and the first pin portion 44 (see the alternate long and short dash line in FIG. 2) is provided on the inside of the first pin portion 44 in the sandwiching portion 43. Is formed. In addition, at the distal end portion of the first pin portion 44, the first ball pin portion 40 and the second ball pin portion 50 are placed at a plurality of locations (eight locations in the present embodiment) that are spaced apart in the circumferential direction. A caulking part 46 for caulking and fixing is provided. Note that the first pin portion 44 of the first ball pin portion 40 shown in FIG. 3 is in a state before the caulking portion 46 is formed.

  The second ball pin portion 50 is integrally formed with a second ball portion 51 having a spherical shape, a second columnar portion 52 as a small diameter portion protruding from the second ball portion 51, and a second columnar portion 52. And a formed second pin portion 54.

  The second ball portion 51 has a pair of second flat portions 51a and 51b that are parallel to each other at both ends in the diameter direction (vertical direction in FIG. 2). Therefore, the second ball portion 51 has a spherical shape with both ends in the diametrical direction missing. In addition, the outer surface 51c of the second ball portion 51 has a spherical shape. The diameter (maximum outer diameter) of the second ball portion 51 is set to a value smaller than the inner diameter of the first pin portion 44 in this embodiment.

  The second columnar part 52 projects from one second flat part 51b (the lower second flat part 51b in FIG. 2) of the pair of second flat parts 51a and 51b of the second ball part 51. The second columnar portion 52 of the present embodiment has a cylindrical shape, and the central axis (see the alternate long and short dash line in FIG. 2) is orthogonal to the second flat portion 51b. The diameter of the second columnar part 52 is smaller than the diameter (maximum outer diameter) of the second ball part 51 and further smaller than the diameter of the mounting hole 23a.

  The second pin portion 54 is integrally formed at the end of the second columnar portion 52 opposite to the second ball portion 51. The second pin portion 54 has a cylindrical shape having a diameter equal to or slightly larger than the inner diameter of the first pin portion 44. Further, the diameter of the second pin portion 54 is set to a value larger than the diameter of the second columnar portion 52 (that is, the second columnar portion 52 is smaller in diameter than the second pin portion 54). The thickness of the second pin portion 54 (the length of the second pin portion 54 in the central axis direction of the second ball pin portion 50) is the same as the thickness of the first pin portion 44 in the central axis direction of the first ball pin portion 40. It is formed thinner than the length. The outer peripheral surface of the second pin portion 54 is a second knurled surface 55 that has been knurled. Furthermore, the front end surface 54a of the second pin portion 54 (that is, the end surface in the axial direction opposite to the second columnar portion 52 in the second pin portion 54) is the central axis of the second pin portion 54 (see the one-dot chain line in FIG. 2). ) Is perpendicular to the plane. Note that the base end surface of the second pin portion 54 and the outer peripheral side of the second columnar portion 52 is a caulking surface 54 b that is parallel to the distal end surface 54 a of the second pin portion 54.

  As shown in FIG. 4 (a), in order to mount the ball pin 32 on the first pivot lever 23, first, it is the same from one opening of the mounting hole 23a (the lower opening in FIG. 4 (a)). The first pin portion 44 of the first ball pin portion 40 is press-fitted into the mounting hole 23a, and the first pin portion 44 is disposed in the mounting hole 23a. At this time, as shown in FIG. 2 and FIG. 4A, the first pin portion 44 is configured such that the contact surface 43a of the clamping portion 43 is the outer periphery of the mounting hole 23a and the first pin portion 44 is pressed into the mounting hole 23a. Until the first pivot lever 23 comes into contact with the mounting hole 23a. Thus, the first ball pin portion 40 is disposed with respect to the first pivot lever 23 in a state where the first ball portion 41 is disposed on one side of the mounting hole 23a with respect to the first pivot lever 23. The In the state where the contact surface 43 a of the clamping portion 43 is in contact with the first pivot lever 23, the first pin portion 44 passes through the mounting hole 23 a (first pivot lever 23), and the tip of the first pin portion 44. The portion projects from the other opening of the mounting hole 23a (the upper opening in FIG. 4A) to the outside of the mounting hole 23a.

  Next, as shown in FIG. 4B, the second pin portion 54 of the second ball pin portion 50 is press-fitted into the first pin portion 44. The second pin portion 54 is press-fitted into the first pin portion 44 from the side opposite to the side where the first ball portion 41 is disposed with respect to the first pivot lever 23. Therefore, the second ball portion 51 is disposed on the other side of the mounting hole 23 a in the penetrating direction with respect to the first pivot lever 23. That is, the second ball portion 51 is disposed on the opposite side of the first ball portion 41 with respect to the first pivot lever 23 with the first pivot lever 23 interposed therebetween. As shown in FIG. 2, the second pin portion 54 is press-fitted into the first pin portion 44 until the tip end surface 54 a of the second pin portion 54 comes into contact with the sandwiching surface 43 b of the sandwiching portion 43. Arranged inside. In the state where the tip surface 54a of the second pin portion 54 is in contact with the contact surface 43a, the tip of the first pin portion 44 is closer to the second ball portion 51 than the caulking surface 54b of the second pin portion 54. It protrudes. Further, the upper surface of the first pivot lever 23 (the surface on the side where the second ball pin portion 50 is disposed) and the caulking surface 54b are orthogonal to the central axis of the second ball pin portion 50 (see the alternate long and short dash line in FIG. 2). Located in the same plane.

  Next, as shown in FIG. 2 and FIG. 4C, a plurality of (eight in this embodiment) caulking portions 46 are formed by caulking the tip portion of the first pin portion 44. The eight caulking portions 46 are formed at eight positions that are equiangularly spaced in the circumferential direction at the tip portion of the first pin portion 44. Each caulking portion 46 is formed by pressurizing the tip of the first pin portion 44 to the base end side (that is, the first ball portion 41 side) of the first pin portion 44 and plastically deforming by caulking (for example, peel caulking). Is done. Each formed caulking portion 46 extends on both the radially inner side and the radially outer side of the first pin portion 44. Each caulking portion 46 is in contact with the caulking surface 54 b of the second pin portion 54, and the second pin portion 54 is sandwiched between the clamping portion 43 (the clamping surface 43 b) of the first ball pin portion 40. . Further, each caulking portion 46 comes into contact with the outer peripheral portion of the mounting hole 23a in the first pivot lever 23 from the second ball portion 51 side (from the upper side in FIG. 2), and the clamping portion 43 (the contact portion 43) of the first ball pin portion 40 The first pivot lever 23 is sandwiched between the contact surface 43a). Therefore, by forming the eight caulking portions 46 at the tip of the first pin portion 44, the first ball pin portion 40 and the second ball pin portion 50 are caulked and fixed, and the first ball pin portion 40 and the first pivot lever 23 are fixed by caulking. In the present embodiment, eight caulking portions 46 are formed simultaneously. Therefore, the number of times that the tip of the first pin portion 44 is crimped to fix the ball pin 32 to the first pivot lever 23 is one.

  As shown in FIG. 2, the ball receiving portion 15 b provided at the tip of the drive source side link rod 15 rolls on the first ball portion 41 of the ball pin 32 mounted on the first pivot lever 23 in this way. Connected as possible. That is, the ball receiving portion 15b provided at the tip of the drive source side link rod 15 is externally fitted to the first ball portion 41, and the inner peripheral surface of the ball receiving portion 15b is connected to the outer surface 41c of the first ball portion 41. It can roll with respect to the first ball portion 41 while being in sliding contact. Therefore, the drive source side link rod 15 is connected to the first pivot lever 23 so as to be relatively rotatable.

  As shown in FIGS. 1 and 2, the second ball portion 51 of the ball pin 32 is connected to the base end portion of the synchronous link rod 16 that connects the first pivot lever 23 and the second pivot lever 24. ing. The base end portion of the synchronous link rod 16 is provided with a resin ball receiving portion 16a having a cap shape similar to the ball receiving portion 15b provided at the distal end portion of the drive source side link rod 15. However, the ball receiving portion 16 a has a smaller inner diameter than the ball receiving portion 15 b formed corresponding to the first ball portion 41 according to the diameter of the second ball portion 51. And this ball receiving part 16a is connected with the 2nd ball part 51 so that rolling is possible. That is, the ball receiving portion 16 a provided at the base end portion of the synchronous link rod 16 is fitted on the second ball portion 51, and the inner peripheral surface of the ball receiving portion 16 a is slid with the outer surface 51 c of the second ball portion 51. It can roll with respect to the second ball portion 51 while being in contact therewith. Therefore, the synchronous link rod 16 is connected to the first pivot lever 23 via the ball pin 32 so as to be relatively rotatable.

  Further, as shown in FIG. 1, a resin ball receiving portion 16b having a cap shape similar to the ball receiving portion 16a provided at the proximal end portion of the synchronous link rod 16 is provided at the distal end portion of the synchronous link rod 16. Is provided. A ball pin 33 is erected on the second pivot lever 24 located on the opposite side of the motor 14 from the first pivot lever 23. The ball pin 33 is fixed to the end opposite to the end to which the second pivot shaft 22 is fixed, of both ends in the longitudinal direction of the second pivot lever 24. The ball receiving portion 16 b is connected to the ball pin 33 so as to be able to roll, so that the synchronous link rod 16 is connected to the second pivot lever 24 so as to be rotatable relative to the second pivot lever 24. The synchronous link rod 16 is for transmitting the driving force of the motor 14 transmitted to the first pivot lever 23 to the second pivot lever 24.

Next, the operation of this embodiment will be described.
In the wiper device 10 of the present embodiment, the motor 14 is rotationally driven in one direction. When the crank arm 14g is rotated by the driving force of the motor 14, the driving force of the motor 14 is transmitted from the crank arm 14g to the driving source side link rod 15, and further transmitted from the driving source side link rod to the first pivot lever 23. Is done. Accordingly, the first pivot lever 23 is reciprocally rotated within a predetermined angle range through the drive source side link rod 15. The reciprocal rotation of the first pivot lever 23 is transmitted to the second pivot lever 24 through the synchronous link rod 16, and the second pivot lever 24 performs reciprocal rotation in a predetermined angle range synchronized with the first pivot lever 23. The first and second pivot shafts 21 and 22 are rotated synchronously by the rotation (swing) of the first and second pivot levers 23 and 24 and are fixed to the pivot shafts 21 and 22. A synchronized wiping operation of a pair of wipers is performed.

  In the wiper device 10, the ball pin 32 attached to the first pivot lever 23 and connected to the distal end portion of the drive source side link rod 15 and the proximal end portion of the synchronous link rod 16 is the first ball pin portion. 40 and the second ball pin portion 50. Further, the first ball pin portion 40 and the second ball pin portion 50 are fixed to the first pivot lever 23 in one mounting hole 23a. When the ball pin 32 is mounted on the first pivot lever 23, the second pin portion 54 is disposed inside the first pin portion 44, and the first pin portion 44 penetrates the mounting hole 23a. A caulking portion 46 is formed by caulking the tip end portion of the 1 pin portion 44 (that is, the end portion of the first pin portion 44 opposite to the clamping portion 43). Then, the first pivot lever 23 and the second pin portion 54 are clamped by the caulking portion 46 and the clamping portion 43. As a result, the first ball pin portion 40 and the second ball pin portion 50 are caulked and fixed to the first pivot lever 23. Therefore, the ball pin 32 can be attached to the first pivot lever 23 without applying a force to the first ball part 41 and the second ball part 51.

Next, characteristic effects of the present embodiment will be described.
(1) When the ball pin 32 is attached to the first pivot lever 23, the roundness of the first ball portion 41 and the second ball portion 51 is suppressed from being reduced, and the first ball portion 41 and the second ball are suppressed. The roundness of the part 51 is maintained. As a result, when the ball receiving portion 15b of the drive source side link rod 15 slides relative to the first ball portion 41, it is possible to suppress the occurrence of uneven wear in the ball receiving portion 15b. Similarly, when the ball receiving portion 16a of the synchronous link rod 16 slides with respect to the second ball portion 51, it is possible to suppress the occurrence of uneven wear in the ball receiving portion 16a.

  (2) Since the outer peripheral surface of the first pin portion 44 is a first knurled surface 45 that has been knurled, the outer peripheral surface of the first pin portion 44 and the inner peripheral surface of the mounting hole 23a are slid. It is difficult to move. That is, relative rotation of the first ball pin portion 40 and the first pivot lever 23 around the axis of the ball pin 32 is suppressed by the first knurled surface 45. Therefore, noise caused by relative rotation between the first ball pin portion 40 and the first pivot lever 23 and wear of the first ball pin portion 40 or the first pivot lever 23 can be suppressed.

  (3) Since the outer peripheral surface of the second pin portion 54 is the second knurled surface 55 that has been knurled, the outer peripheral surface of the second pin portion 54 and the inner peripheral surface of the first pin portion 44 Is difficult to slide. That is, the relative rotation of the first ball pin portion 40 and the second ball pin portion 50 around the axis of the ball pin 32 is suppressed by the second knurled surface 55. Therefore, generation of noise due to relative rotation between the first ball pin portion 40 and the second ball pin portion 50 can be suppressed. Further, it is possible to prevent the first ball pin portion 40, the second ball pin portion 50, and the ball receiving portions 15b and 16a from being worn due to the relative rotation between the first ball pin portion 40 and the second ball pin portion 50. it can.

  (4) The second ball pin portion 50 includes a second columnar portion 52 having a smaller diameter than the second pin portion 54 between the second ball portion 51 and the second pin portion 54. Therefore, since the second ball part 51 and the second pin part 54 are separated in the axial direction of the second ball pin part 50 by the second columnar part 52, the caulking part 46 is formed when the caulking part 46 is formed. It can suppress that the jig | tool for carrying out contacts the 2nd ball | bowl part 51. FIG. Further, since the second columnar part 52 has a smaller diameter than the second pin part 54, the tip part of the first pin part 44 (the caulking part after caulking is provided between the second pin part 54 and the second ball part 51. 46) (a difference between the outer diameter of the second pin portion 54 and the outer diameter of the second columnar portion 52) that can be plastically deformed radially inward. Therefore, it becomes easier to form the caulking portion 46.

  (5) The first ball pin portion 40 has a first columnar portion 42 (first ball pin portion side small diameter portion) having a smaller diameter than the sandwiching portion 43 between the first ball portion 41 and the sandwiching portion 43. Therefore, when the caulking portion 46 is formed, it is possible to suppress a jig for forming the caulking portion 46 (a jig or the like that receives the pressure of the pressing jig) from coming into contact with the first ball portion 41. Therefore, it becomes easier to form the caulking portion 46.

  (6) The diameter of the second ball portion 51 is smaller than the inner diameter of the first pin portion 44. Therefore, when the caulking portion 46 is formed, even if the first pin portion 44 is pressed from the upper side in the axial direction (the upper side in FIG. 2) with a jig for forming the caulking portion 46, the jig is second. Since the contact with the ball portion 51 can be suppressed, the caulking portion 46 can be formed more easily.

  (7) The ball pin 32 is mounted in one mounting hole 23 a provided in the first pivot lever 23, and the first pin portion 44 is formed only by forming a caulking portion 46 at the distal end portion thereof. It is fixed to the pivot lever 23. Therefore, compared with the case where the first ball pin portion 40 and the second ball pin portion 50 are respectively fixed to the first pivot lever 23, the first ball pin portion 40 and the second ball pin portion 50 are connected to the first pivot lever. It is possible to reduce the number of times (man-hours) for caulking to fix to 23. In addition, the first ball pin portion 40 and the second ball pin portion 50 in the first pivot lever 23 are compared with the case where the first ball pin portion 40 and the second ball pin portion 50 are fixed at different positions in the first pivot lever 23. A portion required for fixing the portion 50 can be reduced. Therefore, the enlargement of the first pivot lever 23 can be suppressed.

  (8) The ball pin 32 includes a first ball pin portion 40 and a second ball pin portion 50 that are formed separately. Therefore, the first ball pin portion 40 having one first ball portion 41 and the second ball pin portion 50 having one second ball portion 51 are compared with a ball pin made of one component having two ball portions. The shape can be simplified. Therefore, the ball pin 32 can be manufactured at a lower cost than when a ball pin made of one component having two ball portions is manufactured. Further, the diameters of the first ball part 41 and the second ball part 51 can be set irrespective of the diameter of the mounting hole 23a. When the diameters of the first ball portion 41 and the second ball portion 51 are increased, the surface pressure at the sliding contact surface between the ball receiving portion 15b and the first ball portion 41 and the sliding between the ball receiving portion 16a and the second ball portion 51 are increased. The surface pressure at the contact surface can be reduced. Thereby, it is possible to improve the wear resistance of the ball receiving portion 15b and the ball receiving portion 16a.

In addition, you may change the said embodiment as follows.
In the above embodiment, the diameter of the second ball part 51 is smaller than the diameter of the mounting hole 23a. However, the diameter of the second ball part 51 may be set to be larger than the diameter of the mounting hole 23a. In this way, the area of the outer surface 51c of the second ball portion 51 is larger than when the diameter of the second ball portion 51 is smaller than the diameter of the mounting hole 23a. Accordingly, since the area of the sliding contact portion between the ball receiving portion 16a of the synchronous link rod 16 connected to the second ball portion 51 and the second ball portion 51 is increased, the ball receiving portion 16a and the second ball portion 51 are The surface pressure on the sliding surface can be reduced. Therefore, the wear resistance of the ball receiving portion 16a can be improved.

  In the above embodiment, the first ball pin portion 40 includes the first columnar portion 42 having a smaller diameter than the first ball portion 41 between the first ball portion 41 and the sandwiching portion 43. However, the diameter of the first columnar part 42 is not necessarily smaller than the diameter of the first ball part 41. Further, the first ball pin portion 40 does not necessarily have to include the first columnar portion 42.

  In the above embodiment, the second ball pin portion 50 includes the second columnar portion 52 having a smaller diameter than the second pin portion 54 between the second ball portion 51 and the second pin portion 54. However, the second ball pin portion 50 does not necessarily have to include the second columnar portion 52.

  In the above embodiment, the outer peripheral surface of the second pin portion 54 is knurled to suppress relative rotation of the first ball pin portion 40 and the second ball pin portion 50 around the axis of the ball pin 32. The second knurled surface 55 is formed. However, the second anti-rotation portion that suppresses the relative rotation of the first ball pin portion 40 and the second ball pin portion 50 around the axis of the ball pin 32 is not limited to the second knurled surface 55 of the above embodiment. The second detent portion is provided on at least one of the inner peripheral surface of the first pin portion 44 and the outer peripheral surface of the second pin portion 54, and the ball pin between the first ball pin portion 40 and the second ball pin portion 50. What is necessary is just to suppress the relative rotation around the 32 axis. For example, the ball pin 32 may be provided with a second detent portion such as the example shown in FIGS. 5-10, the same code | symbol is attached | subjected to the structure which is the same as that of the said embodiment, or respond | corresponds. Moreover, the 1st pin part 44 shown in FIGS. 5-10 is a state before the crimping part 46 is formed.

  A serration 62 is formed as a second detent portion on the outer peripheral surface of the second pin portion 54 of the second ball pin portion 61 shown in FIG. The second pin portion 54 having the serration 62 is press-fitted into the first pin portion 44.

  In the example shown in FIG. 6, an engagement groove 72 is formed on the inner peripheral surface of the first pin portion 44 of the first ball pin portion 71, and the outer peripheral surface of the second pin portion 54 of the second ball pin portion 73. An engaging convex portion that engages with the engaging groove 72 is formed. The engaging groove 72 extends along the axial direction of the first pin portion 44, and opens to the inside of the first pin portion 44 and the tip side of the first pin portion 44. Further, the engaging convex portion 74 forms a ridge extending along the axial direction of the second pin portion 54, and the shape of the surface of the engaging convex portion 74 corresponds to the shape of the inner peripheral surface of the engaging groove 72. The shape is made. Then, by inserting the second pin portion 54 into the first pin portion 44 while inserting the engaging convex portion 74 into the engaging groove 72, the first engaging portion 72 and the engaging convex portion 74 engage with each other. The relative rotation of the ball pin portion 71 and the second ball pin portion 73 around the axis of the ball pin 32 is suppressed.

  In the example shown in FIG. 7, a planar first engagement surface 82 is formed on the inner peripheral surface of the first pin portion 44 of the first ball pin portion 81. The first engagement surface 82 is parallel to the axial direction of the first pin portion 44 and is orthogonal to the diameter direction of the first pin portion 44. The first engagement surface 82 is formed from one end of the first pin portion 44 in the axial direction to the other end. Therefore, the inner peripheral surface of the first pin portion 44 has a substantially D shape when viewed from the axial direction (opening direction) of the first pin portion 44. On the other hand, a planar second engaging surface 84 is formed on the outer peripheral surface of the second pin portion 54 of the second ball pin portion 83. The second engagement surface 84 is parallel to the axial direction of the second pin portion 54 and is orthogonal to the diameter direction of the second pin portion 54. The second engagement surface 84 is formed from one end to the other end of the second pin portion 54 in the axial direction. Furthermore, the circumferential width of the second pin portion 54 on the second engagement surface 84 is equal to the circumferential width of the first pin portion 44 on the first engagement surface 82. The second pin portion 54 having the second engagement surface 84 has a substantially D shape when viewed from the axial direction of the second pin portion 54. The second pin portion 54 is inserted into the first pin portion 44 so that the second engagement surface 84 faces the first engagement surface 82. The first engagement surface 82 and the second engagement surface 84 that are in contact with each other suppress the relative rotation of the first ball pin portion 81 and the second ball pin portion 83 around the axis of the ball pin 32. .

  In the example shown in FIG. 8, the inner peripheral surface 44a of the first pin portion 44 of the first ball pin portion 91 has a polygonal cylindrical shape (in the example shown in FIG. 8, a hexagonal cylindrical shape). The outer peripheral surface 54c of the second pin portion 54 of the second ball pin portion 92 has a polygonal cylindrical shape (in the example shown in FIG. 8, a hexagonal cylindrical shape) corresponding to the inner peripheral surface 44a of the first pin portion 44. Yes. The second pin portion 54 is inserted into the first pin portion 44 such that each plane constituting the outer peripheral surface 54 c faces each plane constituting the inner peripheral surface 44 a of the first pin portion 44. Then, the inner periphery 44a of the first pin portion 44 and the outer peripheral surface 54c of the second pin portion 54 that are in contact with each other around the axis of the ball pin 32 between the first ball pin portion 91 and the second ball pin portion 92. Relative rotation is suppressed.

  Further, in the example shown in FIG. 9, a first screw portion 102 having a female screw shape is formed on the inner peripheral surface of the first pin portion 44 of the first ball pin portion 101. Further, a second screw portion 104 having a male screw shape to be screwed with the first screw portion 102 is formed on the outer peripheral surface of the second pin portion 54 of the second ball pin portion 103. The second pin portion 54 is disposed inside the first pin portion 44 while screwing the second screw portion 104 into the first screw portion 102. Then, the first screw portion 102 and the second screw portion 104 screwed together suppress the relative rotation around the axis of the ball pin 32 between the first ball pin portion 101 and the second ball pin portion 103.

  Further, in the example shown in FIG. 10, the engagement convex portion 112 is formed on the inner peripheral surface of the first pin portion 44 of the first ball pin portion 111, and the outer peripheral surface of the second pin portion 54 of the second ball pin portion 113. An engagement groove 114 is formed in which the engagement projection 112 is engaged. The engaging convex portion 112 forms a ridge extending along the axial direction of the first pin portion 44. Further, the engaging groove 114 extends along the axial direction of the second pin portion 54 and opens to the radially outer side of the second pin portion 54 and the tip side (downward in FIG. 10) of the second pin portion 54. ing. Furthermore, the shape of the inner peripheral surface of the engagement groove 114 is a shape corresponding to the shape of the surface of the engagement protrusion 112. Then, by inserting the second pin portion 54 into the first pin portion 44 while inserting the engaging convex portion 112 into the engaging groove 114, the first engaging portion 112 and the engaging groove 114 engage with each other. The relative rotation of the ball pin portion 111 and the second ball pin portion 113 around the axis of the ball pin 32 is suppressed.

  In any of the examples shown in FIGS. 5 to 10 described above, the same effect as (3) of the above embodiment can be obtained. Note that the ball pin 32 does not necessarily include a second anti-rotation portion that suppresses relative rotation of the first ball pin portion 40 and the second ball pin portion 50 around the axis of the ball pin 32.

  In the embodiment described above, the cylindrical outer peripheral surface of the first pin portion 44 is subjected to knurling for suppressing the relative rotation of the first ball pin portion 40 and the first pivot lever 23 around the axis of the ball pin 32. The first knurled surface 45 is provided. However, the first detent portion that suppresses the relative rotation of the first ball pin portion 40 and the first pivot lever 23 around the axis of the ball pin 32 is not limited to the first knurled surface 45 of the above embodiment. The first detent portion is provided on at least one of the outer peripheral surface of the first pin portion 44 and the inner peripheral surface of the mounting hole 23 a, and the axis of the ball pin 32 between the first ball pin portion 40 and the first pivot lever 23. What is necessary is just to suppress the relative rotation around. For example, serrations may be formed on the outer peripheral surface of the first pin portion 44 as a first detent portion, and the first pin portion 44 may be press-fitted into the mounting hole 23a.

  Further, for example, an engagement convex portion extending in the axial direction of the first pin portion 44 (same as the penetrating direction of the mounting hole 23a) is provided on either the outer peripheral surface of the first pin portion 44 or the inner peripheral surface of the mounting hole 23a. In addition, an engagement groove with which the engagement protrusion is engaged may be formed on either the outer peripheral surface of the first pin portion 44 or the inner peripheral surface of the mounting hole 23a. By inserting the first pin portion 44 into the mounting hole 23a while inserting the engaging convex portion into the engaging groove, the first ball pin portion 40 and the first pivot are engaged by the engaging convex portion and the engaging groove engaged with each other. Relative rotation around the axis of the ball pin 32 with the lever 23 is suppressed.

  Further, for example, a flat surface portion that is parallel to the axial direction of the first pin portion 44 is provided on the outer peripheral surface of the first pin portion 44 so that the first pin portion 44 has a substantially D shape when viewed in the axial direction, and the inner periphery of the mounting hole 23a A plane portion that is parallel to the penetration direction of the mounting hole 23a may be provided on the surface so that the mounting hole 23a has a substantially D shape when viewed in the penetration direction. The first pin portion 44 is inserted into the mounting hole 23a such that the flat portion of the first pin portion 44 faces the flat portion of the mounting hole 23a. Then, relative rotation of the first ball pin portion 40 and the first pivot lever 23 around the axis of the ball pin 32 is suppressed by the flat portions that are in contact with each other.

  Further, for example, the outer peripheral surface of the first pin portion 44 may be formed in a polygonal cylindrical shape, and the inner peripheral surface of the mounting hole 23 a may be formed in a polygonal cylindrical shape corresponding to the outer peripheral surface of the first pin portion 44. The first pin portion 44 is inserted into the mounting hole 23a so that each plane constituting the outer peripheral surface thereof faces each plane constituting the inner peripheral surface of the mounting hole 23a. Then, the relative rotation of the first ball pin portion 40 and the first pivot lever 23 around the axis of the ball pin 32 is suppressed by the outer peripheral surface of the first pin portion 44 and the inner peripheral surface of the mounting hole 23a. Is done.

  Further, for example, a male screw portion having a male screw shape may be formed on the outer peripheral surface of the first pin portion 44, and a female screw portion having a female screw shape may be formed on the inner peripheral surface of the mounting hole 23a. The first pin portion 44 is disposed inside the mounting hole 23a while the male screw portion is screwed into the female screw portion of the mounting hole 23a. Then, relative rotation around the axis of the ball pin 32 between the first ball pin portion 40 and the first pivot lever 23 is suppressed by the male screw portion and the female screw portion screwed together.

  Even if any of the first detents described above is provided in the wiper device 10, the same effect as (2) of the above embodiment can be obtained. Note that the ball pin 32 does not necessarily include the first detent portion that suppresses the relative rotation of the first ball pin portion 40 and the first pivot lever 23 around the axis of the ball pin 32.

  In the above embodiment, the ball receiving portion 15 b provided at the distal end portion of the drive source side link rod 15 is connected to the first ball portion 41, and the second ball portion 51 is provided at the proximal end portion of the synchronous link rod 16. The ball receiving portion 16a is connected. However, the ball receiving portion 16a provided at the proximal end portion of the synchronous link rod 16 is connected to the first ball portion 41, and the ball receiving portion provided at the distal end portion of the drive source side link rod 15 to the second ball portion 51. 15b may be connected.

  In the above embodiment, one side of the mounting hole 23a in the penetrating direction is the lower side of the first pivot lever 23 in FIG. 2, and the other side of the mounting hole 23a is the upper side of the first pivot lever in FIG. Yes. However, one side of the mounting hole 23a in the penetrating direction may be the upper side of the first pivot lever in FIG. 2, and the other side of the mounting hole 23a may be the lower side of the first pivot lever 23 in FIG. In this case, in FIG. 2, the first ball portion 41 is disposed above the first pivot lever 23, and the second ball portion 51 is disposed below the first pivot lever 23.

  In the above embodiment, after the first pin portion 44 is press-fitted into the mounting hole 23 a, the second pin portion 54 is disposed inside the first pin portion 44, and then the caulking portion is attached to the distal end portion of the first pin portion 44. By forming 46, the first ball pin portion 40 and the second ball pin portion 50 are fixed to the first pivot lever 23. However, after the first pin portion 44 is press-fitted into the mounting hole 23a, the second pin portion 54 is disposed inside the first pin portion 44 and at the same time the caulking portion 46 is formed to form the first ball pin portion 40 and the second ball The pin part 50 may be fixed to the first pivot lever 23. In this way, the man-hour for mounting the ball pin 32 to the first pivot lever 23 can be reduced.

  In the above embodiment, after the first pin portion 44 is press-fitted into the mounting hole 23 a and the first ball pin portion 40 is disposed with respect to the first pivot lever 23, the second pin portion 54 is moved to the first pin portion 44. The second ball pin portion 50 is press-fitted and disposed with respect to the first ball pin portion 40 and the first pivot lever 23. However, the order in which the first ball pin portion 40 and the second ball pin portion 50 are arranged with respect to the first pivot lever 23 is not limited to this. For example, after the second pin portion 54 is press-fitted into the first pin portion 44 and the second ball pin portion 50 is disposed with respect to the first ball pin portion 40, the first ball pin portion 40 and the second ball pin portion 50 are arranged. May be inserted into the mounting hole 23a from the second ball portion 51 side and the first pin portion 44 may be press-fitted into the mounting hole 23a. In this case, the caulking portion 46 is formed after the first pin portion 44 is press-fitted into the mounting hole 23 a and the integrated body of the first ball pin portion 40 and the second ball pin portion 50 is disposed with respect to the first pivot lever 23. It is formed.

  In the above embodiment, the first pin portion 44 is press-fitted into the mounting hole 23a. However, the first pin portion 44 is not necessarily press-fitted as long as it penetrates the mounting hole 23a. For example, the first pin portion 44 may be inserted into the mounting hole 23a.

  In the above embodiment, the second pin portion 54 is press-fitted into the first pin portion 44. However, the second pin portion 54 does not necessarily need to be press-fitted as long as it is disposed inside the second pin portion 54. For example, the second pin portion 54 may be inserted into the first pin portion 44.

  In the above embodiment, eight caulking portions 46 are formed at the distal end portion of the first pin portion 44 (the end portion of the first pin portion 44 opposite to the clamping portion 43). However, the number of the caulking portions 46 provided at the distal end portion of the first pin portion 44 is not limited to this, and may be 7 or less, or 9 or more.

  In the above embodiment, the first pin portion 44 has a cylindrical shape. However, the first pin portion 44 is not limited to a cylindrical shape, and may be a cylindrical shape. For example, the first pin portion 44 may have a polygonal cylindrical shape. Further, for example, the first pin portion 44 may have an elliptical shape when viewed from the axial direction of the first ball pin portion 40.

  In the above embodiment, the second pin portion 54 has a cylindrical shape. However, the shape of the second pin portion 54 is not limited to a cylindrical shape. For example, the second pin portion 54 may have a cylindrical shape such as a cylindrical shape.

Next, the technical idea that can be grasped from the embodiment and the modified examples will be added below.
(A) In the wiper device according to any one of claims 1 to 4, the first ball pin portion has a smaller diameter than the sandwiching portion between the first ball portion and the sandwiching portion. A wiper device having a first ball pin portion-side small diameter portion.

According to this configuration, when the caulking portion is formed, it is possible to suppress the jig for forming the caulking portion from coming into contact with the first ball portion. Accordingly, it becomes easier to form the caulking portion.
(B) The wiper device according to any one of claims 1 to 4 and (a), wherein a diameter of the second ball portion is smaller than an inner diameter of the first pin portion. Wiper device to do.

  According to this configuration, when the caulking portion is formed, the end of the first pin portion opposite to the clamping portion is pressed from the axial direction of the first pin portion with the jig for forming the caulking portion. However, since it can suppress that this jig | tool contacts a 2nd ball | bowl part, it becomes easier to form a crimp part.

  DESCRIPTION OF SYMBOLS 10 ... Wiper apparatus, 14 ... Motor as drive source, 15 ... Drive source side link rod as 1st link rod, 16 ... Synchronous link rod as 2nd link rod, 21 ... 1st pivot shaft, 22 ... 2nd Pivot shaft, 23 ... first pivot lever, 23a ... mounting hole, 24 ... second pivot lever, 32 ... ball pin, 40, 71, 81, 91, 101, 111 ... first ball pin portion, 41 ... first ball , 43 ... clamping part, 44 ... first pin part, 44a ... inner peripheral surface constituting the second detent part, 45 ... first knurled surface as the first detent part, 46 ... caulking part, 50, 61, 73, 83, 92, 103, 113 ... 2nd ball pin part, 51 ... 2nd ball part, 52 ... 2nd columnar part as a small diameter part, 54 ... 2nd pin part, 54c ... 2nd detent part Comprising the outer peripheral surface, 5: Second knurled surface as second detent part, 62: Serration as second detent part, 72: Engaging groove constituting second detent part, 74: Second detent part Engaging convex portion, 82... First engaging surface constituting the second anti-rotation portion, 84... Second engaging surface constituting the second anti-rotation portion, 102... First screw constituting the second anti-rotation portion. 104, a second screw portion constituting the second anti-rotation portion, 112, an engagement convex portion constituting the second anti-rotation portion, 114, an engagement groove constituting the second anti-rotation portion.

Claims (4)

A first pivot lever for rotating the first pivot shaft;
A second pivot lever for rotating the second pivot shaft;
A ball pin mounted on the first pivot lever;
A first link rod connected to the first pivot lever via the ball pin and transmitting a driving force of a driving source to the first pivot lever;
A second link rod connected to the first pivot lever via the ball pin and transmitting the driving force transmitted to the first pivot lever to the second pivot lever;
With
The first pivot lever has a mounting hole;
The ball pin includes a first ball portion to which one of the first and second link rods is connected, a cylindrical first pin portion that passes through the mounting hole, and the first ball portion and the first ball portion. A first ball pin portion having a clamping portion that contacts the first pivot lever between the first pin portion, a second ball portion to which one of the first and second link rods is connected, and A second ball pin portion having a second pin portion disposed inside the first pin portion;
The first pin portion sandwiches the first pivot lever at the end of the first pin portion opposite to the sandwiching portion and the sandwiching portion, and the second pin between the first pin portion and the inside. A wiper device having a caulking portion for clamping the portion. The wiper device according to claim 1,
At least one of the outer peripheral surface of the first pin portion and the inner peripheral surface of the mounting hole is a first member that suppresses relative rotation of the first ball pin portion and the first pivot lever around the axis of the ball pin. A wiper device provided with a detent portion. The wiper device according to claim 1 or 2,
At least one of the inner peripheral surface of the first pin portion and the outer peripheral surface of the second pin portion suppresses relative rotation of the first ball pin portion and the second ball pin portion around the axis of the ball pin. A wiper device characterized in that a second detent portion is provided. The wiper device according to any one of claims 1 to 3,
The wiper device, wherein the second ball pin portion includes a small diameter portion smaller in diameter than the second pin portion between the second ball portion and the second pin portion.