JP2003118542A - Wiper pivot for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the infiltration of water into a waterproof cap mounted on a pivot holder and to certainly discharge water to the outside even if the water infiltrates. SOLUTION: A pivot shaft 5 is rotatably supported in the pivot holder 8, and is fixed to the end of the pivot holder 8 projected from a through-hole 2a of a rear glass 2. The pivot shaft 5 is passed through the waterproof cap 22, and the waterproof cap 22 is mounted on a nut 19 set at the projecting part of the pivot holder 8. A plate member 22 is mounted on the outer periphery of the pivot holder 8. The lower surface of the plate member 22 is closely attached to the outer peripheral edge of the through-hole 2a, and a recessed part 21a is formed on the tilting lower side of the upper surface of the plate member 22. An annular abutting part 22d abutting on the upper surface of the plate member 21 is formed on the inner surface of the waterproof cap 22. A communicating passage 25 communicating with the outside of the cap is formed across the abutting part 22d with the recessed part 21a of the plate member 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper pivot for a vehicle, and more particularly to a wiper pivot arranged on an inclined surface of a vehicle body.

[0002]

2. Description of the Related Art In some vehicle wipers such as one-box and hatchback, a pivot shaft for fixing a wiper arm is projected to the outside from a through hole of a rear glass and assembled to the vehicle in that state. This type of vehicle wiper is disclosed, for example, in Japanese Utility Model Laid-Open No. 57-84156 and Japanese Utility Model Laid-Open No. 4-51854. In the devices of these publications, a substantially umbrella-shaped waterproof cap that covers the protruding portion of the pivot shaft is used.

Specifically, in Japanese Utility Model Laid-Open No. 57-84156, a waterproof cap is fixed to a pivot shaft to prevent water from entering the waterproof cap along the surface of the pivot shaft. . Further, since the waterproof cap rotates integrally with the pivot shaft, it is necessary to provide a non-contact waterproof structure between the peripheral edge of the waterproof cap and the glass surface. Therefore, by disposing the annular collar formed on the member fixed to the vehicle body between the two annular collars formed on the peripheral portion of the waterproof cap, a labyrinth structure is formed over the entire circumference with the pivot axis as the axis. There is. That is, a non-contact maze structure is provided between the waterproof cap and the glass surface to prevent water from entering from the outside. However, when the device of the publication is attached to an inclined rear glass, there is a gap between the waterproof cap and the glass surface over the entire circumference of the cap. It is conceivable that water will get over the maze structure and enter the inside of the cap. Further, since the waterproof cap rotates together with the pivot shaft, there is a concern that the waterproof cap may interfere with surrounding members and prevent the pivot shaft from rotating.

On the other hand, in Japanese Utility Model Laid-Open No. 4-51854, since the waterproof cap is attached to a member on the vehicle fixed side (for example, a pivot holder that rotatably supports the pivot shaft), the waterproof cap is attached to the surroundings. The problem of interfering with members has been resolved. Further, a through hole is formed at the top of the waterproof cap, and the pivot shaft passes through the through hole in a loosely penetrating manner. Further, the lip-shaped abutting portion on the peripheral edge of the waterproof cap is pressed against and abutted against the glass surface, and thus is in close contact with the entire circumference. This ensures the waterproofness between the waterproof cap and the glass surface.

[0005]

[Problems to be Solved by the Invention]
Also in the apparatus of Japanese Patent No. 51854, water may enter the inside of the waterproof cap. Specifically, when high water pressure is applied during car wash or when vibration due to vehicle running occurs during heavy rain such as typhoon, water may enter through the gap between the through hole and the pivot shaft at the top of the waterproof cap, The peripheral edge of the waterproof cap floats up from the glass surface and water may enter through the gap. Then, once water enters the inside of the cap, the peripheral edge of the waterproof cap is in close contact with the glass surface over the entire circumference, so even if a long time has passed, the water will not be drained to the outside and the inside of the cap will not be discharged. The water remains. As a result, the metal parts inside the cap are corroded, and eventually the fixing member of the pivot holder to the vehicle body is rusted, which further accelerates the generation of rust.

The present invention has been made to solve the above problems, and an object thereof is to prevent water from entering the inside of a waterproof cap mounted on a pivot holder while suppressing the water from entering. Even if it discharges reliably, it is providing the wiper pivot for vehicles.

[0007]

According to a first aspect of the present invention, a pivot holder for rotatably supporting a pivot shaft having a wiper arm fixed to its tip is made to project from a through hole opened in an inclined surface of a vehicle body. In the vehicle wiper pivot fixed to the vehicle body in the state, the pivot shaft penetrates and makes a sliding contact with the tip protruding portion thereof, and a waterproof cap mounted on the protruding portion of the pivot holder, and the pivot holder of the pivot holder. The first surface is attached to the outer periphery of the projecting portion, the first surface is in close contact with the outer peripheral edge of the through hole, and the second surface, which is the back surface of the first surface, has a concave portion partially on the lower side in the inclination direction of the inclined surface. A plate member formed on the waterproof cap, and an abutting portion of the inner surface of the waterproof cap, which abuts against the second surface of the plate member, is formed in an annular shape around the pivot shaft. Form, forms a communication passage communicating with the waterproof cap outer across the abutment by the recess of said plate member.

According to a second aspect of the present invention, in the vehicle wiper pivot according to the first aspect, the abutting portion has an annular shape and is formed corresponding to a position where the recess is formed in the plate member. The recess in the plate member is
The contact portion is formed wider than the radial dimension, and communicates from the inside of the waterproof cap to the outside with the contact portion sandwiched therebetween.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the vehicular wiper pivot according to [4], the contact portion of the waterproof cap has a claw portion that protrudes toward an inner diameter side, and the claw portion is engaged with a protruding portion of the pivot holder.

The invention according to claim 4 is the wiper pivot for a vehicle according to any one of claims 1 to 3, wherein:
The plate member is made of a rubber material and has a disk-like packing that has a seal lip on the outer peripheral edge and is in close contact with the inclined surface,
A hole is partially formed, and a metal plate that overlaps the packing is provided, and the recess is formed by the surface of the packing and the hole of the metal plate.

(Operation) In the invention described in claim 1, the waterproof cap is attached to the protruding portion of the pivot holder. That is, unlike the device disclosed in Japanese Utility Model Laid-Open No. 57-84156, the waterproof cap is not attached to the pivot shaft and the waterproof cap rotates together with the pivot shaft. Therefore, the problem that the waterproof cap interferes with the surrounding members and the rotation of the pivot shaft is prevented does not occur.

Further, the first surface of the plate member is brought into close contact with the outer peripheral edge of the through hole, and a concave portion is partially formed on the lower side in the inclination direction of the second surface which is the back surface of the first surface. On the other hand, on the inner surface of the waterproof cap, a contact portion that contacts the second surface of the plate member is formed in an annular shape around the entire circumference in the circumferential direction around the pivot shaft. Further, the recess of the plate member forms a communication passage that straddles the contact portion and communicates with the outside of the waterproof cap. In this case, the upper side in the tilt direction of the plate member is in close contact with the contact portion of the waterproof cap, and the communication path communicating with the outside of the waterproof cap is formed on the lower side in the tilt direction. Therefore, even if water is splashed on the waterproof cap from the upper side along the inclined surface, the water is prevented from entering the waterproof cap. In addition, since the communication passage is formed only on the lower side in the inclination direction, invasion of water from the communication passage is prevented against gravity. Furthermore, even if water enters the inside of the waterproof cap due to high water pressure applied during car washing, it will be drained from the communication passage on the lower side in the inclination direction, so water will not remain inside the waterproof cap. .

According to the second aspect of the present invention, the contact portion of the waterproof cap has an annular shape, and the contact portion is in contact with the plate member except for the portion corresponding to the recess of the plate member, so that the waterproof function is achieved. The inside and outside of the cap are cut off.
On the other hand, in the portion corresponding to the recess of the plate member, the recess and the contact portion form a communication path of a maze structure.
According to this structure, a communication path having a maze structure is formed on the lower side in the inclination direction, water can be reliably prevented from entering from the outside, and a more excellent waterproof effect can be obtained.

According to the third aspect of the present invention, the abutting portion of the waterproof cap has the claw portion projecting toward the inner diameter side, and the claw portion is engaged with the projecting portion of the pivot holder. in this case,
Since the waterproof cap is fixed to the pivot holder using the contact portion provided for the sealing action, the structure can be simplified without requiring a special fixing member. Further, the claw portion is formed inside the abutting portion and has a fixing structure inside the waterproof cap, so that the appearance is not deteriorated.

According to the fourth aspect of the invention, the plate member is composed of a rubber packing and a metal plate. The rubber packing has a seal lip and is brought into close contact with the inclined surface to improve the sealing performance. On the other hand, the metal plate has high rigidity, and a uniform contact pressure is applied in the circumferential direction of the packing by the metal plate. Then, a hole is formed in the metal plate, and one surface of the hole is closed by the surface of the packing to form a recess. In this case, it is possible to form a plate member having a high sealing property by using two members made of different materials, and it is possible to easily form a recess in the plate member.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a rear wiper 1 of an automobile. The rear wiper 1 includes a wiper blade 3 that wipes the surface of the rear glass 2 and a wiper arm 4 that supports the wiper blade 3. The wiper arm 4 includes an arm head 6 that is integrally rotatably fixed together with the pivot shaft 5, and an arm 7 that is connected to the arm head 6 such that a base end portion of the arm head 6 is tiltable by a predetermined angle.
The wiper blade 3 is connected to the tip of the arm 7.

The pivot shaft 5 is rotatably supported in the pivot holder 8. The pivot holder 8 is fixed such that its tip portion projects from a through hole formed in the rear glass 2. The base end portion of the pivot holder 8 is formed integrally with the housing 10 of the wiper motor 9, and the wiper motor 9 is fixed to the vehicle body panel (not shown) together with the pivot holder 8. The pivot shaft 5 in the pivot holder 8 is also the rotation shaft of the wheel gear that meshes with the worm formed on the armature rotation shaft of the motor 9, that is, the output shaft of the wiper motor 9. And
When the wiper motor 9 is driven, the pivot shaft 5 is reciprocally rotated within a predetermined angle range, and the rear wiper 1 is wiped by the rotation.

The structure of the pivot holder 8 will be described below with reference to FIG. The pivot holder 8 includes a holder body 12, a cushion member 13, first and second plates 1.
4, 15, a seal member 16 and the like. The cushion member 13 is arranged between the holder body 12 and the first plate 14. The first plate 14 has a first tongue piece 14a protruding downward and a second tongue piece 14b protruding horizontally. A groove 12a (see FIG. 1) is formed on the outer peripheral surface of the holder body 12, and the first tongue piece 14a of the first plate 14 is fitted into the groove 12a, so that the first plate for the holder body 12 is The rotation of 14 is restricted. In addition, the first plate 14
The second tongue piece 14b is used for positioning when fixing the pivot holder 8 to the rear glass 2. Specifically, the pivot holder 8 is positioned by fitting the second tongue piece 14b of the first plate 14 into a vehicle fixed side member (not shown).

A circular pipe portion 14c is provided at the center of the first plate 14 so as to project upward.
A cylindrical portion 17 extending from the holder body 12 is inserted in 4c. An O-ring 18 for ensuring the sealing property is provided on the outer peripheral surface of the cylindrical portion 17 inside the circular pipe portion 14c. Further, the pivot shaft 5 is rotatably supported inside the cylindrical portion 17 of the holder body 12 via a bearing (not shown).

A seal member 16 is fitted on the outer peripheral surface of the circular pipe portion 14c of the first plate 14. The seal member 16 has a substantially cylindrical shape, and is formed such that the lower side of the substantial center has a smaller diameter than the upper side. That is, in the seal member 16, the upper side (rear glass 2 side) is the large tube portion 16a, and the lower side (first plate 14 side) is the small tube portion 1a.
6b.

The second plate 15 is fitted in the small cylinder portion 16b of the seal member 16. The second plate 15 has a disk shape, and a seal member 16 is provided at the center thereof.
An accommodating portion 15a for accommodating the small tubular portion 16b is provided so as to protrude downward. The lower end of the storage portion 15a is in contact with the first plate 14. In addition, the seal member 16
The outer diameter of the large tubular portion 16a is larger than the through hole 2a of the rear glass 2, and the upper surface of the large tubular portion 16a is in close contact with the glass surface 2b at the peripheral edge of the through hole 2a.

A circular pipe portion 14c extending from the first plate 14
Has an upper end protruding from the through hole 2a of the rear glass 2, and a nut 19 is screwed onto the upper end. The plate member 2 mounted on the outer circumference of the circular pipe portion 14c by the nut 19
1 is clamped and fixed, and the rear glass 2 is sandwiched between the plate member 21 and the seal member 16. Further, a waterproof cap 22 is attached to the nut 19 so as to sandwich its side surface.

In this embodiment, the plate member 21 and the waterproof cap 22 prevent water from entering the pivot holder 8. Hereinafter, the waterproof structure including the plate member 21 and the waterproof cap 22 will be described in detail.

The plate member 21 comprises a packing 23 and a metal plate 24. The packing 23 is a disc-shaped seal plate made of a rubber material. A thick portion 23a is formed at the center of the packing 23, and its inner surface is brought into contact with the circular pipe portion 14c to restrict the radial movement thereof. A seal lip 23b is formed on the outer peripheral edge of the packing 23.
The sealability is ensured by closely adhering to the glass surface 2c in the crushed state of b.

The metal plate 24 has a disk shape like the packing 23. Specifically, as shown in FIG. 3, the metal plate 24 is formed with a plurality of (four in the present embodiment) hole portions 24 a that communicate the upper and lower surfaces thereof. These holes 24a are provided only on the right side of the center line Lc of the metal plate 24. The metal plate 24 has the same size as the packing 23, and the plate member 21 is formed by stacking them. In this plate member 21, the lower side of the hole 24a in the metal plate 24 is closed by the upper surface of the packing 23, so that the recess 21a is formed in the upper surface (see FIG. 2).

The shape of the metal plate 24 on the inner diameter side (hole shape for fitting into the circular pipe portion 14c) is not a perfect circle but a part thereof is a straight line. The outer peripheral surface of the circular pipe portion 14c is also formed in conformity with the linear shape, and the plate member 21 is fitted into the circular pipe portion 14c while aligning these linear portions. As a result, the recess 21a is provided only on the right side of the center line Lc in FIG.

In FIG. 2, the rear glass 2 is shown along the left-right direction of the drawing, but the actual rear glass 2 is attached to the vehicle in an inclined state with respect to the ground. Specifically, the diagonal line Lh shown in FIG. 2 is a line (horizontal line) indicating the horizontal direction of the ground. Further, the broken line arrow X indicates the gravity direction (ground direction), and the broken line arrow Y indicates the anti-gravity direction (top direction). Therefore, in FIG. 2, the right side of the center line Lc corresponds to the lower side in the inclination direction, the left side of the center line Lc corresponds to the upper side in the inclination direction, and the recess 21a in the plate member 21 is only on the lower side in the inclination direction (gravity direction side). It is arranged. In this manner, the plate member 21 has its lower surface (first surface) in close contact with the outer peripheral edge of the through hole 2a of the rear glass 2, and partially recesses the upper surface (second surface) downward in the inclination direction.
1a is formed.

FIG. 4 is a bottom view of the waterproof cap 22, and FIG. 5 is a sectional view taken along the line AA of FIG. As shown in FIGS. 4 and 5, the waterproof cap 22 has a substantially umbrella shape, and a circular pipe portion 22a that opens upward is formed in the center thereof, and the pivot shaft 5 (see FIG. (See 2)
Has been inserted. As shown in FIG. 5, a flange portion 22b extending outward in the radial direction is formed at the tip of the circular pipe portion 22a. Further, the inner peripheral surface of the circular pipe portion 22a is provided with a projection 22c at the tip and the central portion. This protrusion 22c
Is formed over the entire circumference in the circumferential direction and is in sliding contact with the outer peripheral surface of the pivot shaft 5. As a result, rainwater etc.
It is possible to prevent the water from penetrating into the waterproof cap 22 along the surface of the.

On the inner surface of the waterproof cap 22,
An abutting portion 22d that abuts the plate member 21 is formed at a position corresponding to the recess 21a of the plate member 21. The abutting portion 22d is provided at a position that becomes the entire circumference in the circumferential direction of the pivot shaft 5, has an annular shape as shown in FIG. 4, and is formed so that the nut 19 can fit inside thereof (FIG. 6).

More specifically, as shown in FIGS. 2 and 5, the abutting portion 22d has a claw portion 22e protruding toward the inner diameter side at its lower end, and the claw portion 22e engages with the lower portion of the nut 19. Has been done. The nut 19 is a hexagon nut,
The top and bottom of the six corners are chamfered. The claw portion 22 is provided in a gap formed between the chamfered portion and the plate member 21.
e is inserted so that the nut 19 is securely sandwiched. Further, the inner surface of the contact portion 22d is formed in an uneven shape. As shown in FIG. 6, on the side surface of the nut 19, the central portion is not in contact with the contact portion 22d, and the portion near the corner is in contact with the contact portion 22d. It is in surface contact with. In this way, the inner surface of the contact portion 22d makes surface contact with the side surface of the nut 19 near the corners, whereby the waterproof cap 22 is securely fixed to the nut 19. That is, when the pivot shaft 5 rotates, the projection 22 on the circular pipe portion 22a of the waterproof cap 22 is rotated.
Since c is in sliding contact with the pivot shaft 5, the waterproof cap 22 tries to rotate together, but the inner side surface of the contact portion 22d is fixed in a state of being in surface contact with the side surface of the nut 19, so that the waterproof cap 22 can be rotated together reliably. To be prevented.

Further, the inner surface of the waterproof cap 22 is shown in FIG.
Further, as shown in FIG. 5, a plurality of (12 in this embodiment) grooves 22f are formed at equal angular intervals from the contact portion 22d toward the inner side in the radial direction. These grooves 22f are provided at the center of the recess on the inner side surface of the contact portion 22d. As shown in FIG. 6, when the nut 19 is fitted inside the contact portion 22d, a gap (contact portion 2) formed between the inner surface of the contact portion 22d and the side surface of the nut 19 is formed.
2d and the nut 19).
Either 2f is communicated. Further, on the outer side of the contact portion 22d, a circumferential groove 22g is formed over the entire circumference.
Are formed.

As shown in FIG. 2, the recess 21a of the plate member 21 is wider than the radial dimension of the contact portion 22d, and the contact portion 2 of the waterproof cap 22 is made wider.
Inner groove 22f and outer peripheral groove 2 with 2d in between
2 g is communicated with the recess 21 a of the plate member 21. Further, a gap s is provided between the outer peripheral edge of the waterproof cap 22 and the glass surface, and the circumferential groove 22g communicates with the outside of the waterproof cap 22 by this gap s. In the present embodiment, four recesses 21a of the plate member 21 are formed only on the lower side in the inclination direction (right side of FIG. 2),
At the portion where the recess 21a is formed, the waterproof cap 22
A communication passage (water passage) 25 that connects the inside to the outside is formed. As shown by the chain double-dashed line in FIG. 2, this communication passage 25 becomes a passage having a maze structure that passes through the groove 22f → the recess 21a → the circumferential groove 22g.

As shown in FIG. 6, since the groove 22f located in the vicinity of the corner of the nut 19 is closed, the nut 19 is closed.
The communication passage 25 may be blocked depending on the tightening position of the. Therefore, in the present embodiment, the waterproof cap 2
Twelve grooves 22f, which are larger than the corners of the nut 19, are formed, and a plurality of recesses 21a of the plate member 21 (4
Are formed). Therefore, even if the groove 22f located near the corner of the nut 19 is closed, the other groove 22f
The communication passage 25 to the outside of the waterproof cap 22 is secured by f (the groove 22f in the non-engaging portion between the side surface of the nut 19 and the contact portion 22d) and the recess 21a of the plate member 21.

The tip of the pivot shaft 5 has a threaded portion 5a.
Is formed, and the arm head 6 is provided below the screw portion 5a.
A taper portion 5b for fixing the. A recess 6a for accommodating the circular pipe portion 22a of the waterproof cap 22 is formed on the lower surface of the arm head 6, and the tapered portion 5b is inserted in the center of the recess 6a with the pivot shaft 5 inserted. A fitting hole 6b for fitting with is formed. The nut 27 is screwed into the threaded portion 5 a at the tip of the pivot shaft 5 via the washer 28. By tightening the nut 27, the arm head 6
Is attached to the pivot shaft 5, and the arm head 6 is rotated integrally with the pivot shaft 5. Further, a cover 29 is provided to cover the fixed portion between the pivot shaft 5 and the arm head 6.

As described above, in this embodiment, the tip (upper end) of the circular pipe portion 22a of the waterproof cap 22 is at the arm head 6.
The circular tube portion 22a is housed in the concave portion 6a, and a flange portion 22b is formed at the tip of the circular pipe portion 22a. With this configuration, water is prevented from adhering to the pivot shaft 5, so that water does not enter the inside of the waterproof cap 22 along the surface of the pivot shaft 5.

The upper side of the plate member 21 in the direction of inclination (left side in FIG. 2) is the contact portion 22 of the waterproof cap 22.
A communication passage (water passage) 25 that is in close contact with d and communicates with the outside of the waterproof cap 22 is formed on the lower side (the right side in FIG. 2) in the inclination direction. Therefore, even if water is splashed on the waterproof cap 22 from above along the wiping surface (the upper surface of the rear glass 2 in FIG. 2) 2c of the rear glass 2 that is an inclined surface, the invasion of water into the waterproof cap 22 is prevented. It Further, since the communication passage 25 is formed on the lower side in the inclination direction, it is possible to prevent water from entering from the communication passage 25 against gravity.

Thus, when the above waterproof structure is adopted,
During normal operation of the wiper 1, water does not enter the inside of the waterproof cap 22. However, high water pressure may be applied to the waterproof cap 22 at the time of washing the vehicle, or water may be sucked into the waterproof cap 22 due to a pumping action caused by vibration during traveling of the vehicle. When water enters the waterproof cap 22, the water is drained to the outside from the communication passage 25 formed on the lower side in the inclination direction, and therefore does not remain in the waterproof cap 22.

Further, in this embodiment, the waterproof cap 22 is attached to the pivot holder 8 and the pivot shaft 5 is slidably contacted by the circular pipe portion 22a of the waterproof cap 22. That is, unlike the device of Japanese Utility Model Laid-Open No. 57-84156, the waterproof cap 22 does not rotate with the pivot shaft 5. Therefore, there is no problem in that the waterproof cap 22 interferes with a peripheral member (for example, dust adhered to the wiping surface 2c of the rear glass 2) to prevent the pivot shaft 5 from rotating.

As described in detail above, this embodiment has the following features. (1) Since the communication passage 25 that communicates with the outside of the waterproof cap 22 is partially formed on the lower side in the inclination direction (gravity direction side), it is possible to suppress water from entering the waterproof cap 22 and The water that has accumulated can be reliably discharged to the outside. As a result, corrosion of the metal parts in the pivot holder 8 including the pivot shaft 5 is prevented, and the pivot shaft 5 is prevented from corroding.
It is possible to avoid the problem that the particles are stuck.

(2) A recess 21a is formed in the plate member 21, and a communication passage 25 for communicating the inside and the outside of the waterproof cap 22 is formed with the contact portion 22d sandwiched by the recess 21a. In this case, since the communication passage 25 has a labyrinth structure, it is possible to reliably prevent intrusion of water from the outside and obtain a more excellent waterproof effect.

(3) The contact portion 22d of the waterproof cap 22 has a claw portion 22e, and the claw portion 22e is a pivot holder 8.
Is engaged with the nut 19 at the protruding portion of the. in this case,
Since the waterproof cap 22 is fixed to the pivot holder 8 using the contact portion 22d provided for the sealing action, the structure can be simplified without requiring a special fixing member. Further, since the claw portion 22e is formed inside the contact portion 22d, the claw portion 22e has a fixing structure inside the waterproof cap 22, and the appearance is not deteriorated.

(4) The plate member 21 comprises a rubber packing 23 and a metal plate 24. Packing 23
Has a sealing lip 23b and is brought into close contact with the glass surface to improve the sealing property. On the other hand, the metal plate 24 has high rigidity, and a uniform contact pressure is applied in the circumferential direction of the packing 23 by the metal plate 24. The packing 23
A concave portion 21 a is formed by the surface of the metal plate 24 and the hole 24 a of the metal plate 24. Thus, two different materials
The plate member 21 having a high sealing property can be formed by using the two members 23 and 24, and the recess 21a in the plate member 21 can be easily formed.

(5) Contact part 2 of waterproof cap 22
Since the convex / concave portion for making surface contact with the side surface of the nut 19 is formed on the inner surface of 2d, the waterproof cap 22 can be securely fixed to the nut 19, and the waterproof cap 22 is prevented from rotating along with the rotation of the pivot shaft 5. can do.

(6) In this embodiment, as shown in FIG. 3, the inner diameter of the metal plate 24 constituting the plate member 21 is not a perfect circle but a part thereof is a straight line. The position of the plate member 21 is defined by the part (position defining part) of. As a result, the recess 21a of the plate member 21 can be reliably set to the lower side in the tilt direction.

In addition to the above, the present invention can be embodied in the following forms. -In the above-mentioned embodiment, the through-hole 2 opened to the rear glass 2
Although the end of the pivot holder 8 is fixed to a, the invention is not limited to this. For example, the pivot holder 8 may be fixed to the vehicle body below the rear glass. The point is that it can be applied to a vehicle wiper in which the pivot holder 8 is fixed in a state of protruding from the through hole of the inclined surface of the vehicle body.

In the above embodiment, the waterproof cap 22 is mounted and fixed to the nut 19, but the nut 19
It may be fixed to a site other than. In the above embodiment, the plate member 21 has four recesses 2
Although 1a is formed, it is not limited to this. However, it is desirable to provide two or more recesses 21a in the plate member 21 in order to ensure drainage performance.

The technical ideas that can be understood from the above-described embodiment will be described below along with their effects. (A) The inclined surface is a rear glass wiping surface, and the end portion of the pivot holder is fixed in a state of protruding from a through hole of the inclined rear glass of the vehicle. Item 1. The vehicle wiper pivot according to item 1. Some vehicle wipers have an end portion of a pivot holder projected and fixed in a through hole of an inclined rear glass in a vehicle, and it is practically preferable to apply the present invention to the vehicle wiper.

(B) The waterproof cap is fixed to a nut for tightening and fixing the plate member, and the inner surface of the waterproof cap is formed in an uneven shape so as to make surface contact with the side surface of the nut. Claims 1-4
The wiper pivot for vehicles according to any one of 1. Thus, when the waterproof cap is fixed to the nut for tightening and fixing the plate member, the waterproof cap can be securely fixed to the nut by forming the inner surface of the waterproof cap in an uneven shape so as to make surface contact with the nut side surface. It is possible to prevent the waterproof cap from rotating along with the rotation of the pivot shaft.

(C) The plate member is provided with a position defining portion which defines a position in the circumferential direction.
The wiper pivot for vehicles according to any one of to 4. As described above, by providing the plate member with the position defining portion and performing the positioning of the plate member, the concave portion of the plate member can be surely set to the lower side in the inclination direction.

[0050]

As described in detail above, according to the present invention,
While suppressing the intrusion of water into the waterproof cap, it can be reliably discharged even if water intrudes.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a rear wiper in the present embodiment.

FIG. 2 is a sectional view showing a pivot holder according to this embodiment.

FIG. 3 is a plan view showing a plate member.

FIG. 4 is a bottom view showing the waterproof cap.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a bottom view showing the waterproof cap with a nut inserted.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rear wiper, 2a ... Through hole, 2c ... Rear glass wiping surface, 5 ... Pivot shaft, 8 ... Pivot holder, 21 ... Plate member, 21a ... Recess, 22 ... Waterproof cap, 22
d ... Abutting portion, 22e ... Claw portion, 23 ... Packing, 23b ...
Seal lip, 24 ... Metal plate, 24a ... Hole, 2
5 ... Communication passage.

Claims (4)

[Claims] 1. A wiper pivot for a vehicle, wherein a pivot holder rotatably supporting a pivot shaft having a wiper arm fixed to a tip thereof is fixed to a vehicle body in a state of protruding from a through hole opened in an inclined surface of the vehicle body. The pivot shaft penetrates and is in sliding contact with the protruding portion of the tip thereof, and is attached to the protruding portion of the pivot holder, and the waterproof cap is attached to the outer periphery of the protruding portion of the pivot holder.
The surface is in close contact with the outer peripheral edge of the through hole, and the first
A plate member in which a concave portion is partially formed on the lower side of the inclined surface in the inclination direction of the second surface, which is the back surface of the surface, and the second surface of the plate member contacts the second surface of the inner surface of the waterproof cap. A contacting portion that contacts is formed annularly around the entire circumference in the circumferential direction around the pivot shaft, and a recessed portion of the plate member forms a communication path that communicates with the outside of the waterproof cap across the contacting portion. Characteristic vehicle wiper pivot. 2. The abutting portion has an annular shape and is formed corresponding to a position where a concave portion is formed in the plate member, and the concave portion of the plate member is wider than a radial dimension of the abutting portion. The wiper pivot for a vehicle according to claim 1, wherein the wiper pivot is formed on the vehicle and communicates from the inside of the waterproof cap to the outside with the abutting portion interposed therebetween. 3. The contact portion of the waterproof cap has a claw portion protruding toward the inner diameter side, and the claw portion is engaged with a protruding portion of the pivot holder.
The wiper pivot for vehicles as described in. 4. The plate member is made of a rubber material, and has a disk-like packing which has a seal lip on an outer peripheral edge thereof and is in close contact with the inclined surface, and a metal plate which is partially formed with holes and is superposed on the packing. The vehicle wiper pivot according to any one of claims 1 to 3, wherein the recess is formed by the surface of the packing and the hole of the metal plate.