JP2013082324A - Wiper blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper blade capable of sandwiching a cover between a holder part and a holder plate in a caulking pin bonding step for the holder part and the holder plate and sandwiching and fixing the cover without using a spacer.SOLUTION: A spot facing part 13a protruding toward the holder plate 11 side at a step difference corresponding to the thickness of the cover 20 is formed in the bottom wall of a bracket 13 which constitutes the holder part 10. The cover 20 is sandwiched between the bracket 13 and the holder plate 11 via the spot facing part 13a in a through hole 20b and the bracket 13 and the holder plate 11 are caulked and fixed by a pin 15 at the part of the spot facing part 13a. Thus the spot facing part 13a functions as a spacer and the cover 20 can be sandwiched between the bracket 13 and the holder plate 11.

Description

  The present invention relates to a wiper blade used in a wiper device of a vehicle such as an automobile, and more particularly to a winter wiper blade in which an upper side of a blade rubber is entirely included and covered with a cover.

  As described above, the wiper blade for the winter season is covered and covered entirely with a cover made of an elastic material so that the snow scraped off from the surface to be wiped adheres to and accumulates on the blade rubber. Can be avoided as much as possible.

  Among the wiper blades, so-called flat type wiper blades that do not use a tournament-type lever assembly can be attached to and detached from the wiper arm by attaching a holder unit at the center in the length direction as shown in Patent Document 1. To be connected.

JP 2008-126853 A

  The holder unit is made of a corrosion-resistant metal material such as stainless steel, and is composed of a holder portion for the wiper arm, and a holder plate that is detachably mounted on a blade rubber having a vertebra attached thereto by caulking and pinning the holder portion. Yes.

  The holder plate is attached to the blade rubber by forming an opening portion in the cover, and the holder plate is attached to the blade rubber through the opening portion. Thorough sealing around the part may be difficult.

  Therefore, according to the present invention, a cover can be sandwiched between the holder part and the holder plate by a caulking pin, and the cover is caulked without damaging the cover without using a dedicated spacer at the pin coupling part. Therefore, a wiper blade that can improve the sealing performance around the holder unit is provided.

  The wiper blade of the present invention is disposed along the blade rubber, the first vertebra disposed along the base of the blade rubber, and the base and first vertebra of the blade rubber. The second vertebra which is held and fixed, the holder portion with respect to the wiper arm is pin-coupled, and the holder plate connected to the center portion in the longitudinal direction of the second vertebra is sandwiched between the holder portion and the holder plate. And a cover made of an elastic material that covers and covers the entire blade rubber from the holder plate to the base of the blade rubber, the pin of the holder portion with respect to the holder plate A counterbore portion that protrudes toward the holder plate with a step corresponding to the thickness of the cover is formed in the coupling portion, and the counterbore portion is It is mainly characterized in that to function as a spacer which is disposed through the bar.

  According to the present invention, since these members can be integrally pin-coupled with the cover sandwiched between the holder and the holder plate, the cover is provided with an opening window for disposing the holder plate. In addition, the holder plate can be connected to the blade rubber side.

  Therefore, the sealing performance around the holder plate of the cover can be improved, and water can be thoroughly prevented from entering and freezing.

  Also, since the counterbore part of the holder part functions as a spacer, the above three members can be caulked and joined without damaging the cover with a caulking pin without the need for a dedicated spacer, reducing the number of parts and reducing the cost. Can be realized.

The perspective view which shows the whole external appearance of the wiper blade which concerns on this invention. The disassembled perspective view of a wiper blade. Sectional drawing in alignment with the AA of FIG. The top view of the bracket which comprises a holder part. Sectional drawing which follows the BB line of FIG. Sectional drawing similar to FIG. 5 which shows the example from which the bracket in a holder part differs.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The wiper blade of the embodiment shown in FIGS. 1 and 2 includes a blade rubber 1 and a first vertebra 7 for dispersing and equalizing the pressing force acting on the blade rubber 1 in its length direction. I have.

  As shown in FIG. 3, the blade rubber 1 includes a lower lip 2 that wipes and wipes a surface to be wiped such as a front window panel and a rear window panel of an automobile, and the lip 2 and the neck portion 4. And an upper base 3 provided continuously.

  The base 3 is composed of an upper portion 3U having a substantially rectangular cross section on the upper side, and a lower portion 3L wider than the upper portion 3U, and in the length direction on both sides of the connecting portion between the upper portion 3U and the lower portion 3L. The groove part 5 along is formed.

  The first vertebra 7 is formed in the shape of a strip that is slightly wider than the base 3 with an appropriate spring steel material, and is disposed so as to overlap the upper surface of the upper portion 3U of the base 3.

  The upper portion 3U and the first vertebra 7 are held and fixed by a second vertebra 8 having both functions as a retainer member.

  The second vertebra 8 is made of an appropriate synthetic resin material, and is formed with a C-shaped channel cross-sectional portion 8A for holding the first vertebra 7 and a narrower width than this, with the lower edge as a flange portion 8a. Thus, the channel section 8B having a rectangular shape that holds the upper section 3U is formed into a continuous multi-stage channel section shape.

  In the present embodiment, slits 6 are formed in the length direction on both sides in the width direction of the upper portion 3U, and a third vertebra 9 made of a leaf spring material is fitted and disposed in the slit 6. The third vertebra 9 is held by the channel section 8B of the second vertebra 8 together with the upper portion 3U, and has a function of suppressing the twisting operation of the upper portion 3U during the wiping operation.

  A holder plate 11 provided with a holder portion 10 for a wiper arm (not shown) is attached to a central portion in the length direction of the second vertebra 8.

  The holder portion 10 is a clip 12 that is detachably inserted into and engaged with the end portion of the wiper arm, and a U-shaped bracket that is rotatably supported by a support shaft 14 between opposing walls in the width direction. 13.

  The holder portion 10 has a bottom wall of the bracket 13 superimposed on the upper surface of the central portion of the holder plate 11 and is fixed by caulking with two caulking pins 15 at intervals in the length direction.

  Both the holder part 10 and the holder plate 11 are made of a corrosion-resistant metal material such as stainless steel.

  Both end portions in the length direction of the holder plate 11 are offset downward at both side edges in the width direction by steps corresponding to the plate thickness to form holding portions 11a having a C-shaped channel cross section, and the holding portions 11a Is fitted on the channel cross section 8A on the upper side of the second vertebra 8.

  On the upper wall of the channel cross section 8A, a locating hole 8b is formed at the position corresponding to the caulking head of the caulking pin 15 protruding to the lower surface side of the holder plate 11, and the caulking head falls and engages. The holder unit composed of the holder plate 11 and the holder portion 10 is appropriately positioned.

  A cover 20 is sandwiched and fixed between the bottom wall of the holder portion 10 and the holder plate 11.

  Here, as shown in FIG. 4 and FIG. 5, as shown in FIGS. 4 and 5, a pin coupling portion of the holder portion 10 with respect to the holder plate 11, that is, a pin coupling portion at both ends in the length direction of the bottom wall of the bracket 13. A counterbore 13a that protrudes toward the holder plate 11 is formed by a step corresponding to the thickness.

  And this counterbore part 13a contact | abuts on the holder plate 11, the caulking pin 15 is penetrated by pin insertion hole 13b, 11b provided in this counterbore part 13a and the holder plate 11, and these both are caulked and couple | bonded. I am doing so.

  Further, at both ends in the length direction of the bottom wall of the bracket 13, an extension portion 13c is projected in an arc shape so that the terminal is separated from the counterbore portion 13a.

  The cover 20 is formed of an elastic material, for example, a rubber material similar to the blade rubber 1 and has a substantially C-shaped cross section, and the lower edges on both sides in the width direction are flange portions 20a whose U-shaped cross sections face each other in a back-to-back manner.

  A through-hole 20b is formed in the central portion of the cover 20 in the length direction so as to correspond to the counterbore portions 13a and 13a of the holder portion 10. By inserting the counterbore part 13a into the through hole 20b and caulking and fixing the holder part 10 and the holder plate 11 through the caulking pins 15 and 15 into the pin insertion holes 13b and 11b as described above, the cover 20 is fixed. It is caulked and fixed integrally with the holder unit while being sandwiched between the bottom wall of the holder portion 10 excluding the counterbore portion 13a and the holder plate 11. Accordingly, the counterbore portion 13a functions as a spacer for avoiding crushing of the cover 20 to be caulked and joined.

  The flange portion 20a of the cover 20 is overlapped and bonded to the groove portion 5 of the base portion 3 of the blade rubber together with the flange portion 8a in a state where the flange portion 8a of the second vertebra 8 is inserted into the U-shaped cross section. It is inserted and arranged.

  Accordingly, the cover 20 covers the entire portion from the holder plate 11 of the holder unit to the upper portion 3U of the base portion 3 of the blade rubber 1 so as to be covered.

  As with the blade rubber 1, the cover 20 is continuously extruded into a constant cross-sectional shape and cut into a required length. Therefore, for example, a rubber end cap 22 is attached to the open section of the longitudinal end of the cover 20 to seal the open section.

  For example, as shown in FIG. 2, the end cap 22 has a leg portion 22a that is inserted into a gap formed between the cover 20 and both sides of the lower half of the second vertebra 8, and the leg portion 22a is inserted into the gap. By being press-fitted, it can be prevented from coming off by its own elastic action.

  The holder unit composed of the holder portion 10 and the holder plate 11 and the cover 20 are sub-assembled, and the holder unit assembled with the cover 20 is further sub-assembled to the second vertebra 8. The assembly of the holder unit to the second vertebra 8 is performed by fitting and holding the holding portion 11a of the holder plate 11 and the second vertebra 8 in sliding contact with each other in the length direction. . At this time, the caulking head of the caulking pin 15 protruding from the lower surface of the holder plate 11 falls into the locating hole 8b of the second vertebra 8 and engages the holder unit with the cover 20 and the second vertebra 8 Positioning in the longitudinal direction is performed. At the stage where this positioning is performed, the flange portions 8a and 20a are bonded together.

  Then, the assembly of the second vertebra 8 and the cover 20, the blade rubber 1, and the first vertebra 7 is performed as follows.

  First, the third vertebra 9 is press-fitted into the slit 6 of the upper portion 3U of the base portion 3 of the blade rubber 1 to be sub-assembled.

  Next, the lengthwise end of the upper portion 3U is collated with the lower channel side cross-sectional portion 8B of the lengthwise end of the second vertebra 8 and the lower edge flange portion of the channel cross-sectional portion 8B. 8a and the length direction end of the overlapping portion of the flange portion 20a of the lower edge of the cover 20 and the length direction end of the groove portion 5 of the base portion 3 of the blade rubber 1, the blade rubber 1, The two vertebras 8 and the cover 20 are press-fitted into each other in the length direction.

  Finally, the end cap 22 is inserted into the gap between the cover 20 and the blade rubber 1 at the open ends on both sides in the length direction of the cover 20, and the leg portions 22a are fitted and mounted. The assembly is finished by sealing the open section of the terminal.

  When the blade rubber 1 is removed when the blade rubber 1 is replaced, the above procedure is reversed.

  According to the wiper blade of the present embodiment having the above-described configuration, these members 10, 11, and 20 are integrally clamped by the pin 15 in a state where the cover 20 is sandwiched between the holder portion 10 and the holder plate 11. Since it can be caulked and fixed (coupled), the cover 20 can be connected to the blade rubber 1 side of the cover 20 without providing an opening for arranging the holder plate as in the prior art.

  Therefore, the sealing performance of the cover 20 around the holder plate 11 can be enhanced, and water can be thoroughly prevented from entering and freezing.

  Further, since the counterbore 13a of the holder portion 10 functions as a spacer, the above-mentioned three members 10, 11, and 20 can be caulked and joined with the caulking pins 15 without damaging the cover 20 without using a dedicated spacer. Reduction of points and cost reduction can be realized.

  Further, in the present embodiment, the counterbore portion 13a described above is provided on the bottom wall of the holder portion 10, that is, both end portions in the length direction of the bottom wall of the bracket 13, and the extension portion 13c is provided at the bottom wall end portion. Is projected in a circular arc shape to ensure a large dimension from the caulking fixing point to the terminal.

  This ensures a sufficient pressing area of the cover 20 on the outer side in the length direction from the pin coupling portion of the holder portion 10, and suppresses the concentration of external force on the caulking pin coupling portion of the cover 20 during the wiping operation, It is possible to avoid the occurrence of breakage such as a crack of the cover 20 from the caulking pin coupling portion.

  FIG. 6 shows a modified example of the bracket 13 constituting the holder portion 10, and an arcuate extension portion 13 c of the bottom wall is formed by projecting and raising a claw 13 d toward its lower surface side.

  Thus, when the cover 20 is sandwiched between the holder portion 10 and the holder plate 11 and fixed by the caulking pin 15, the claw 13d is cut and raised on the lower surface side of the extension portion 13c, and the cover 20 Can be fixed more stably.

DESCRIPTION OF SYMBOLS 1 ... Blade rubber 3 ... Base 7 ... 1st vertical bra 8 ... 2nd vertical bra 10 ... Holder part 11 ... Holder plate
13 ... Bracket 13a ... Counterbore part 13b ... Pin insertion hole 13c ... Extension part 13d ... Cut and raised claw

Claims (3)

Blade rubber,
A first vertibra disposed along a base of the blade rubber;
A second vertebra disposed along the base of the blade rubber and the first vertebra, and holding both of them together;
A holder plate that is pin-coupled to the holder portion with respect to the wiper arm, and is connected to the longitudinal central portion of the second vertebra;
And a cover made of an elastic material that is sandwiched and fixed between the holder part and the holder plate and covers the entire part of the blade rubber from the holder plate to the base of the blade rubber. And
A counterbore portion that protrudes toward the holder plate at a step corresponding to the thickness of the cover is formed at a pin coupling portion of the holder portion with respect to the holder plate, and the counterbore portion is disposed through the cover. A wiper blade characterized by functioning as a spacer.   The counterbore part is provided at both ends in the length direction of the bottom wall of the holder part, and an extension part protrudes in an arc shape at both ends in the length direction of the bottom wall. The wiper blade according to 1.   3. The wiper blade according to claim 1, wherein a cut-and-raised claw that bites into a sandwiched portion of the cover is provided on a lower surface of the bottom wall of the holder portion.

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