JP4184929B2 - Wiper device - Google Patents

Description

The present invention relates to a wiper device that wipes a wiping surface with a wiper.

Conventionally, in this type of wiper device, a wiper device in which a pivot holder made of resin is integrally formed with a pipe frame is known from Japanese Patent Laid-Open No. 9-39714. In this wiper device, plate-like portions are formed at both ends of a pipe frame, and a pivot holder is resin outsert-molded on the plate-like portions, and the wiper motor is mounted on a motor bracket fixed to the pipe frame.
Japanese Patent Laid-Open No. 9-39714

In the pipe frame of the wiper device described above, the pivot holder is resin outsert-molded at both ends of the pipe frame, and the vehicle body side fixing portion is integrally formed of resin with the pivot holder. The holders must be placed close together. In addition, since the hole must be formed in the plate-shaped portion of the pipe frame corresponding to the pivot shaft hole formed in the pivot holder in order to support the pivot shaft, the strength of the plate-shaped portion that is simply crushed and molded is increased. If the pipe frame is lowered and the strength of the entire pipe frame is insufficient, and the pipe frame is bent, the pivot holder may be displaced to affect the operation of the wiper.

The present invention provides a wiper device that includes a wiper unit that does not require the vehicle body side fixing portion and the pivot holder to be disposed close to each other, and that can provide high strength even in an integrally molded portion of resin in a pipe frame. The purpose of this is to establish the following configuration and means.

According to the wiper device of the first aspect of the present invention, the pipe body (1a) that can be crushed into a plate shape by a press die, and fixed to both ends of the pipe body, respectively, the vehicle body panel fixing part (1c1, Between the pipe frame (1) comprising the first and second brackets (1c, 1d) provided with 1d1) and the first and second brackets (1c, 1d) of the pipe frame (1) A wiper motor bracket (40) fixed on the pipe body (1a), a wiper motor (31) fixed on the wiper motor bracket (40), the first bracket (1c), and the wiper motor bracket (40); A pivot holder (1b) formed on the pipe body (1a), a pivot shaft (35) supported by the pivot holder (1b), and the pivot A pivot arm (34) fixed to a pivot shaft (35), a link connecting rod (33) coupled to the pivot arm (34) and driven by the wiper motor (31), and the pivot holder (1b) The pipe body (1a) is crushed and formed into a plate shape, and a crushed plate portion (1a3) in which holes are formed, and ribs are formed on the sides of the crushed plate portion (1a3). By the bending process based on the crushed protrusions (1a11, 1a12) thus formed and the holes formed in the crushed plate part (1a3), the crushed protruding part (1a3) is formed so as to be orthogonal to the plate surface of the crushed plate part (1a3). A pivot shaft provided with a cylindrical shaft (1a4) and a pivot shaft hole (1b2) formed coaxially with the tube-shaped projection (1a4) and through which the pivot shaft (35) is rotatably inserted. A support part (1b3) and the crushed plate part (1a ) And a pivot holder body (1b1) formed so as to surround the pipe body (1a). The pivot shaft support portion (1b3) and the pivot holder body (1b1) are integrally formed by resin outsert molding. It is characterized by being.

According to a wiper device of a second aspect of the present invention, in the wiper device according to the first aspect, the pivot shaft support portion is formed to protrude from both side portions of the pivot holder body.

According to the wiper device of the first aspect of the present invention, it is not necessary that the vehicle body side fixing portion and the pivot holder are arranged close to each other, and the pivot holder has a pivot shaft hole through which the pivot shaft is rotatably inserted. Since the pivot shaft support portion and the pivot holder body formed so as to surround the pipe body connected to the crushed plate portion are integrally formed with the resin shaft, the pipe body There is an effect that the upper pivot holder, that is, the integrally molded portion of the resin can be secured with high strength.

According to a wiper device of a second aspect of the present invention, in the wiper device of the first aspect, in addition to the effect of the wiper device of the first aspect, the strength of the pivot shaft support portion is further increased. And an effect of facilitating the attachment of the pivot arm pivotally attached to the pivot shaft support portion.

1 to 14 show an embodiment of a pipe frame, a wiper unit including the pipe frame, and a method for forming the pipe frame according to the present invention.

The illustrated pipe frame 1 is provided in a wiper unit 30, which includes a wiper motor 31, a motor arm 32, a first link connecting rod 33, a first pivot arm 34, a first pivot shaft 35, A second link connecting rod 36, a second pivot arm 37, and a second pivot shaft 38 are provided.

The pipe frame 1 is formed with a pipe main body 1a, a pivot holder 1b, a first bracket 1c, a second bracket 1d, and a wiper motor fixing portion 1e.

As shown in FIG. 7, the pipe body 1a is formed into a cylindrical shape having an outer diameter d1 and a plate thickness t1 and a hollow portion 1a1.

In the pipe body 1a, a pivot holder molding portion 1a2 is formed near one end, which is the right side in FIG. 1. The pivot holder molding portion 1a2 includes a crushed plate portion 1a3, a cylindrical projection 1a4, a crushing portion. The protrusions 1a11 and 1a12 are formed, respectively.

As shown in FIG. 8, the crushed plate portion 1a3 is crushed by the first and second press dies 71 and 72 in the first direction A orthogonal to the cylindrical direction of the pipe body 1a and The opposing first and second side plates 1a5 and 1a6 of the pipe main body 1a are brought into close contact with each other by the crushing process by the third and fourth press dies 73 and 74 in the second direction B orthogonal to the direction of 1. As a thing, it is formed in the thickness dimension t2 shown by FIG. At this time, as shown in FIG. 6, a rectangular crushed protrusion 1a11 crushed to a height L1 larger than the thickness t2 of the crushed plate 1a3 is formed on the side of the crushed plate 1a3. 1a12 are formed. The crushed protrusions 1a11 and 1a12 have an outer dimension L2 shown in FIG.

The crushed plate portion 1a3 has a length dimension L3 shown in FIG. 9 which is larger than the inner diameter dimension d2 of the first pivot shaft hole 1b2 formed in the pivot holder 1b in the cylindrical direction of the pipe body 1a. As shown in FIG. 9, the pipe body 1a in which the crushed plate portion 1a3 is formed has a first hollow portion 1a7 that becomes the divided hollow portion 1a1 on one side of the crushed plate portion 1a3. One pipe portion 1a8 is formed, and a second pipe portion 1a10 having a second hollow portion 1a9 that becomes the divided hollow portion 1a1 is formed on the other side of the crushed plate portion 1a3.

The crushed plate portion 1a3 is formed with a thickness t2 as a result of the first and second side plates 1a5, 1a6 facing each other of the pipe body 1a being in close contact with each other. Since the crushed protrusions 1a11 and 1a12 having a height dimension L1 larger than the thickness dimension t2 of the crushed plate portion 1a3 are respectively formed in a rib shape, the crushed plate portion 1a3 is simply crushed into a plate shape. In comparison, the strength is high.

As shown in FIG. 10, the crushed plate portion 1 a 3 has a substantially central position by drilling with the fifth and sixth press dies 75 and 76 in the first direction A facing the plate thickness direction. A pilot hole 1a13 penetrating through is formed. The pilot hole 1a13 has an inner diameter d3 shown in FIG.

As shown in FIG. 12, the cylindrical protrusion 1a4 has a pilot hole 1a13 formed by the seventh and eighth press dies 77 and 78 in the first direction A facing along the plate thickness direction of the crushed plate portion 1a3. Is formed into a cylindrical shape orthogonal to the plate surface of the crushed plate portion 1a3, and is projected downward from the crushed plate portion 1a3.

The cylindrical protrusion 1a4 has two inner diameters d4 shown in FIG. 13 slightly larger than the inner diameter d2 of the first pivot shaft hole 1b2 shown in FIG. 5 formed in the pivot holder 1b. The fourth side plates 1a14 and 1a15 are formed.

The pivot holder 1b is integrally formed with the pipe body 1a by resin outsert molding to the crushed plate portion 1a3, the cylindrical projection 1a4, and the first and second pipe portions 1a8 and 1a10.

The pivot holder 1b includes a pivot holder body 1b1 formed in a cylindrical shape outside the pipe body 1a, and a pivot shaft support portion 1b3 formed in a cylindrical shape perpendicular to the length direction of the pivot holder body 1b1. The pivot shaft support portion 1b3 is provided with a through hole with an inner diameter dimension d2 slightly smaller than the inner diameter dimension d4 of the inner wall 1a16 of the cylindrical projection 1a4 with respect to the center of the inner wall 1a16 of the cylindrical projection 1a4. A first pivot shaft hole 1b2 is formed.

The pivot holder 1b includes a crushed plate portion 1a3 formed by first and second side plates 1a5 and 1a6 that are in close contact with each other, and a crushed protrusion formed in a rib shape on the side portion of the crushed plate portion 1a3. The pipe main body 1a is integrally molded by resin outsert molding to a pivot holder molding portion 1a2 having high strength by 1a11, 1a12 and a cylindrical protrusion 1a4 arranged orthogonal to the crushed plate portion 1a3. .

Further, when the pivot holder 1b is resin outsert-molded, the end portions of the crushed plate portion 1a3, that is, the two third and fourth side plates 1a14, 1a15 forming the cylindrical projection 1a4, The first and second side plates 1a5 and 1a6 forming the crushed plate portion 1a3 are arranged orthogonal to each other, and a closing portion 1a17 is formed at the distal ends of the third and fourth side plates 1a14 and 1a15. Therefore, the closing portion 1a17 prevents the molding resin from flowing from the third and fourth side plates 1a14 and 1a15 into the first and second hollow portions 1a7 and 1a9.

A first pivot shaft 35 is rotatably inserted into the first pivot shaft hole 1b2 of the pivot holder 1b. The first pivot shaft 35 includes a pivot arm at the distal end of a round rod-shaped pivot shaft body 35a having an outer diameter d5 shown in FIG. 2 that is slightly smaller than the inner diameter d2 of the first pivot shaft hole 1b2. A coupling portion 35b is formed, and a wiper arm attachment portion 35c is formed at the proximal end portion of the pivot shaft main body 35a.

A pivot shaft fixing portion 34a formed at the base end portion of the first pivot arm 34 is fixed to the pivot arm coupling portion 35b by caulking. A first ball pin 51 is attached to the upper surface side of the first pivot arm 34, and a second ball pin 52 is attached to the lower surface side thereof.

The wiper arm attachment portion 35c is formed with a serration forming portion 35c1 and a screw portion 35c2. The wiper arm attachment portion 35c is inserted into a pivot shaft attachment hole formed at the base end portion of the wiper arm (not shown), the serration formation portion 35c1 is fitted into the serration receiver of the first wiper arm, and a nut (not shown) is attached to the screw portion 35c2. The first wiper arm is fixed by being screwed. A first wiper blade (not shown) is attached to the tip of the first wiper arm.

An oil reservoir 35d having an outer diameter that is slightly smaller than the outer diameter d6 of the pivot shaft main body 35a is formed at a substantially central portion of the pivot shaft main body 35a. The oil reservoir 35d includes a pivot holder 1b. The lubricating oil is sealed between the first pivot shaft hole 1b2.

A pin groove 35e is formed between the wiper arm mounting portion 35c and the oil reservoir 35d of the pivot shaft main body 35a, and a sea-shaped (C) pin 53 is fitted into the pin groove 35e. The first pivot shaft 35 is inserted into the first pivot shaft hole 1b2 after the wave washer 54 is inserted into the proximal end portion on the first pivot arm 34 side and the wiper arm mounting portion 35c is first inserted. A flat washer 55 is inserted on the lower end side of one pivot shaft hole 1b2, and a sea-shaped pin 53 is fitted into the pin groove 35e so that it can be rotated and secured to the pivot holder 1b. A pivot cover 39 is attached to the pin groove 35a of the pivot shaft main body 35a around the bottom end of the sea-shaped pin 53, the flat washer 55, and the pivot shaft support portion 1b3.

The first bracket 1c is integrally formed with one end of the pipe body 1a, and a vehicle body panel fixing portion 1c1 is formed on the first bracket 1c. A bolt (not shown) is inserted into the vehicle body panel fixing portion 1c1, and the bolt is screwed into the vehicle body panel.

The second bracket 1d is integrally formed with the other end portion of the pipe body 1a, and a second pivot shaft hole and a vehicle body panel fixing portion 1d1 (not shown) are formed on the second bracket 1d. . Similarly to the first pivot shaft hole 1b2, the second pivot shaft 38 is rotatably supported and attached to the second pivot shaft hole. A bolt (not shown) is inserted into the body panel fixing portion 1d1 in the same manner as the first bracket 1c, and the bolt is screwed into the body panel.

The wiper motor fixing portion 1e is disposed between the pivot holder molding portion 1a2 on the pipe body 1a and the second bracket 1d, and the wiper motor bracket 40 fixed to the wiper motor 31 is screwed to the wiper motor fixing portion 1e. 41 and 41 are fixed.

A first ball retainer 56 attached to one end of the first link connecting rod 33 is coupled to the first ball pin 51 of the first pivot arm 34 via a spherical pair. A first ball retainer 56 is disposed at one end of the first link connecting rod 33, and a second ball retainer 57 is attached to the other end of the first link connecting rod 33. A third ball pin 58 attached to the portion is coupled via a spherical pair.

In the motor arm 32, an output shaft fixing portion 32a formed at the base end portion thereof is fixed to the output shaft 31a of the wiper motor 31 by screwing a nut 59, and a third ball pin 58 is disposed at the distal end portion thereof.

The wiper motor 31 is provided with an output shaft 31 a that rotates when energized. A wiper motor bracket 40 is fixed to the wiper motor 31. The wiper motor bracket 40 is formed with a vehicle body panel fixing portion 40a having the same function as the first and second brackets 1c and 1d.

A third ball retainer 60 attached to one end of the second link connecting rod 36 is coupled to the second ball pin 52 of the first pivot arm 34 via a spherical pair. A third ball retainer 60 is disposed at one end of the second link connecting rod 36, and a fourth ball retainer (not shown) is attached to the other end, and the fourth ball retainer is a second pivot arm. A spherical ball is coupled to a fourth ball pin (not shown) attached to the tip of 37.

The base end portion of the second pivot arm 37 is caulked and fixed to the distal end portion of the second pivot shaft 38, and a fourth ball pin is disposed at the distal end portion. A proximal end portion of a second wiper arm (not shown) is screwed to the proximal end portion of the second pivot shaft 38, and a second wiper blade (not shown) is attached to the distal end portion of the second wiper arm.

In the wiper unit 30, when the wiper motor 31 is energized, the output shaft 31 a is rotated, the motor arm 32 is rotated by the rotation of the output shaft 31 a, and the rotation of the motor arm 32 is first rotated by the first link connecting rod 33. When the first pivot arm 34 reciprocates, the first pivot shaft 35 reciprocates, and the first wiper arm reciprocates on the wind screen. Move and wipe the windscreen with the first wiper blade. When the first pivot arm 34 reciprocally rotates, the second pivot connecting rod 36 causes the second pivot arm 37 to reciprocate and the second pivot shaft 38 to reciprocate, The wiper arm 2 is swung back and forth on the windscreen, and the windscreen is wiped with the second wiper blade.

The pipe frame 1 used for such a wiper unit 30 is formed by the following process.

7, 8, and 9 show a first step of forming the crushed plate portion 1 a 3 in the pipe frame 1 a.

In the first step, the first and second press dies 71 and 72 and the third and fourth press dies 73 and 74 are used. The first and second press dies 71 and 72 are respectively provided with pressing surface portions 71a and 72a corresponding to the size of the crushed plate portion 1a3 formed by the first and second side plates 1a5 and 1a6. The third and fourth press dies 73 and 74 are respectively formed with concave surface portions 73a and 74a corresponding to the length L2 of the crushed plate portion 1a3.

Then, the first and second press dies 71 and 72 perform crushing in a first direction A orthogonal to the tube direction of the pipe body 1a, and the third and fourth press dies 73 and 74 By pressing in the second direction B orthogonal to the first direction A, the crushed plate portion 1a3 is formed in which the opposing first and second side plates 1a5, 1a6 of the pipe body 1a are brought into close contact with each other. In addition, rectangular crushed protrusions 1a11 and 1a12 are formed on the sides of the crushed plate portion 1a3, respectively.

Next, FIGS. 10 and 11 show a second step of forming the pilot hole 1a13 in the crushed plate portion 1a3.

In the second stroke, fifth and sixth press dies 75 and 76 are used. The fifth press die 75 is a punch, and the sixth press die 76 is a die. The fifth press die 75 is formed with a blade 75a corresponding to the inner diameter d3 of the pilot hole 1a13. The sixth press die 76 is formed with a blade 46a corresponding to the blade 45a.

Then, by drilling the sixth press die 76 in the first direction A perpendicular to the cylindrical direction of the pipe body 1a by the fifth press die 75, substantially the center of the crushed plate portion 1a3. A pilot hole 1a13 penetrating vertically is formed in the part. This pilot hole 1a13 serves as a reference hole when the cylindrical protrusion 1a4 is formed in the third stroke.

Subsequently, FIGS. 12 and 13 show a third step of forming the cylindrical protrusion 1a4 on the crushed plate portion 1a3.

In the third step, burring is performed by the seventh and eighth press dies 77 and 78. The seventh press die 77 is a punch, and the eighth press die 78 is a die. The seventh press die 77 is formed with a blade 77a corresponding to the inner diameter d4 of the cylindrical projection 1a4. The eighth press die 78 is formed with a blade 78a corresponding to the blade 77a.

Then, the seventh press die 77 is bent into the eighth press die 78 in the first direction A orthogonal to the cylindrical direction of the pipe body 1a, whereby the plate surface of the crushed plate portion 1a3. A cylindrical projection 1a4 is formed so as to protrude downward from the crushed plate portion 1a3, and a pivot holder molding portion 1a2 is formed on the pipe body 1a.

Further, FIG. 14 shows a fourth step of forming the pivot holder 1b in the pivot holder molding portion 1a2 of the pipe body 1a.

In the fourth step, the first and second molding dies 79 and 80 are used. The first mold 79 is used to mold the upper half of the first pipe portion 1a8, the upper surface side of the crushed plate portion 1a3, the upper half of the second pipe portion 1a10, and the pivot shaft hole 1b2. The second mold 80 is used to mold the lower half of the first pipe portion 1a8, the lower surface side of the crushed plate portion 1a3, and the lower half of the second pipe portion 1a10.

Then, the resin outsert molding is performed by the first and second molding dies 79 and 80, whereby the pivot holder 1b is formed in the pivot holder molding portion 1a2 of the pipe body 1a. At this time, since the closed portion 1a17 is formed at the tip of the third and fourth side plates 1a14, 1a15 forming the cylindrical protrusion 1a4, the third and fourth side plates 1a14, Resin outsert molding is performed without the molding resin flowing from 1a15 into the first and second hollow portions 1a7, 1a9.

As described above, the pivot holder 1b is formed in the shape of a rib on the crushed plate portion 1a3 formed by the first and second side plates 1a5 and 1a6 that are in close contact with each other, and on the side portion of the crushed plate portion 1a3. The pipe main body 1a is formed by resin outsert molding to the pivot holder molding portion 1a2 having high strength by the crushed projections 1a11, 1a12 and the cylindrical projection 1a4 arranged orthogonal to the crushed plate portion 1a3. It is integrally molded.

Further, when the pivot holder 1b is resin outsert-molded, the end portions of the crushed plate portion 1a3, that is, the two third and fourth side plates 1a14, 1a15 forming the cylindrical projection 1a4, Arranged orthogonally to the first and second side plates 1a5, 1a6 forming the crushed plate portion 1a3, a closing portion 1a17 is formed at the tip of the third and fourth side plates 1a14, 1a15. Therefore, the closing resin 1a17 prevents the molding resin from flowing from the third and fourth side plates 1a14, 1a15 into the first and second hollow parts 1a7, 1a9.

The inner diameter d2 of the first pivot shaft hole 1b2 after the pivot holder 1b is resin outsert-molded is formed to have an inner diameter that is slightly larger than the outer diameter d5 of the first pivot shaft 35. In addition, the inner diameter dimension d2 of the first pivot shaft hole 1b2 is formed to be smaller than the inner diameter dimension d4 of the inner wall 1a16 of the cylindrical protrusion 1a4. Further, the first pivot shaft hole 1b2 is formed with the thin resin portion 1b4 between the outer diameter d5 of the first pivot shaft 35 and the inner wall 1a16 of the cylindrical projection 1a4. The outer diameter of the pivot shaft 35 and the inner wall 1a16 of the cylindrical projection 1a4 are not in direct contact with each other.

It is a top view of one Example of the wiper unit which has a pipe frame concerning this invention. It is the sectional view on the AA line of the pipe frame shown in FIG. It is an external appearance perspective view of the pivot holder part of the pipe frame shown in FIG. FIG. 4 is a plan view of the pipe frame shown in FIG. 3. It is CC sectional view taken on the line of the pipe frame shown in FIG. FIG. 4 is a cross-sectional view of the pipe frame shown in FIG. 3 taken along line BB. It is sectional drawing of a pipe frame explaining the 1st process of the shaping | molding method of the pipe frame concerning this invention. It is an external appearance perspective view explaining the 1st process of the shaping | molding method of the pipe frame concerning this invention. It is sectional drawing of a pipe frame explaining the 1st process of the shaping | molding method of the pipe frame concerning this invention. It is an external appearance perspective view explaining the 2nd process of the shaping | molding method of the pipe frame concerning this invention. It is sectional drawing of a pipe frame explaining the 2nd process of the shaping | molding method of the pipe frame concerning this invention. It is an external appearance perspective view explaining the 3rd process of the shaping | molding method of the pipe frame concerning this invention. It is sectional drawing of a pipe frame explaining the 3rd process of the shaping | molding method of the pipe frame concerning this invention. It is sectional drawing of a pipe frame explaining the 4th process of the shaping | molding method of the pipe frame concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe frame 1a Pipe main body 1a1 Hollow part 1a3 Collapsed board part 1a4 Cylindrical protrusion 1a5 (Side plate) 1st side plate 1a6 (Side plate) 2nd side plate 1a7 1st hollow part 1a8 1st pipe part 1a9 2nd Hollow portion 1a10 second pipe portion 1a11 crushed protrusion 1a12 crushed protrusion 1a13 (reference hole) pilot hole 1a14 third side plate 1a15 fourth side plate 1a16 inner wall 1a17 closed portion 1b pivot holder 1b2 (pivot shaft hole) 1st pivot shaft hole 1c (vehicle body side mounting bracket) first bracket 1d (vehicle body side mounting bracket) second bracket 1e wiper motor fixing portion 30 wiper unit 31 wiper motor 31a output shaft 32 motor arm 33 (link connecting rod) first Link connecting rod 34 (pivot arm) first pivot arm 35 (first pivot) Preparative axis) pivot axis 40 wiper motor bracket

Claims (2)

A pipe main body (1a) that can be crushed into a plate shape by a press die, and first and second brackets (1c) that are respectively fixed to both ends of the pipe main body and provided with vehicle body panel fixing portions (1c1, 1d1). 1d) and a wiper motor bracket (40) fixed on the pipe body (1a) between the first and second brackets (1c, 1d) of the pipe frame (1). ), A wiper motor (31) fixed on the wiper motor bracket (40), and a pivot holder formed on a pipe body (1a) between the first bracket (1c) and the wiper motor bracket (40) (1b), a pivot shaft (35) supported by the pivot holder (1b), and a pivot arm (34) fixed to the pivot shaft (35) And a link connecting rod (33) coupled to the pivot arm (34) and driven by the wiper motor (31). The pivot holder (1b) has a plate formed by collapsing the pipe body (1a). A crushed plate portion (1a3) formed in a shape and having a hole, a crushed protrusion (1a11, 1a12) formed in a rib shape on a side portion of the crushed plate portion (1a3) , and A cylindrical projection (1a4) which is formed by projecting perpendicularly to the plate surface of the crushed plate portion (1a3) by bending based on the hole formed in the crushed plate portion (1a3), and this cylindrical projection A pivot shaft support portion (1b3) formed coaxially with the portion (1a4) and provided with a pivot shaft hole (1b2) through which the pivot shaft (35) is rotatably inserted, and the crushed plate portion (1a3) ) To surround the pipe body (1a). And a pivot holder body (1b1), the pivot shaft support part and (1b3) a pivot holder body (1b1), but wiper apparatus characterized by being integrally formed by resin outsert molding. The wiper device according to claim 1, wherein the pivot shaft support portion (1b3) is formed to protrude from both side portions of the pivot holder body (1b1).

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