JP2019064364A - Cover member for wiper blade - Google Patents

Abstract

To provide a cover member for a wiper blade, which makes a molding tool hardly worn away and which makes a molded article hardly cracked.SOLUTION: In a hood 10 provided in a wiper blade, a recess 12 fitted with a head of a wiping part is provided with an end 13 and lateral surfaces 14 on both sides. A bent part between the end 13 and the lateral surfaces 14 on both the sides is formed as a round part 15 that is formed of a curved shape. Upside and downside lateral surface parts 16 and 17 on both the sides of the hood 10 are inclined to spread toward the bottom toward openings of upside and downside dies 41 and 42 during molding, respectively.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cover member for a wiper blade used for a wiper blade used for waterproofing in cold regions and the like.

  Some wiper blades used in a cold area (snowfall area) or the like include a cover member (for example, a rubber hood) that covers the wiper blade main body (supporting portion for supporting the wiping member). In such a hooded wiper blade (so-called winter blade), the hood prevents snow and water from entering the inside of the wiper blade body, so that the snow and frozen water etc. function as the wiper blade (for example, the support portion It is prevented that the rotation operation | movement of the several lever which comprises these) is inhibited.

JP 2014-4846 A JP 2012-224126 A

  In such a wiper blade with a cover member, it is necessary to support the wiping member (blade rubber) disposed outside the cover member by the wiper blade main body housed inside the cover member. For this reason, the cover member is provided with a recess for accommodating a part (head) of the wiping member.

  The concave portion of such a cover member is formed to have a U-shaped cross section in accordance with the shape of the head of the wiping member. However, when forming a recess having such a U-shaped cross-section, the mold for forming is likely to be worn away at corners on both sides of the end face of the deepest part of the U-shaped cross-section. There is a problem that a crack is likely to occur at the corner portion.

  The present invention has been made in view of such problems, and it is an object of the present invention to provide a wiper blade cover member which is less likely to be worn in a molding die and less likely to be cracked in a molded product.

  According to the present invention, in a wiper blade cover member for covering a blade supporting member provided on a wiper blade, a recess for accommodating at least a part of the wiping member of the wiper blade is provided, and a bent portion in the recess is formed in a curved shape. ing.

  The recess may have an end face and side faces on both sides of the end face, and a bent portion between the end face and the side face may be formed in a curved shape.

  The end face of the recess and the portion of the wiping member that contacts the end face of the recess when being accommodated in the recess may both be flat.

  The side surface portions on both sides of the cover member may be inclined such that the widths of the side surfaces extend toward the opening of the mold at the time of molding.

  According to the present invention, in the cover member (for example, the hood 10), in the recess (for example, the recess 12) for accommodating at least a part (for example, the head 21A) of the wiping member (for example, the wiping unit 21) It is formed. For example, the bent portion (e.g., the R portion 15) between the end surface (e.g., the end surface 13) of the recess and the side surface (e.g., the side surface 14) on both sides has a curved shape. Therefore, since the corner portion can be made not to exist in the concave portion, it is possible to reduce the abrasion generated in the mold for forming the cover member. In addition, since the corner is not formed in the molded product, the occurrence of cracks in the corner can be prevented.

  If the end face of the recess (for example, the end face 13) and the portion of the wiping member in contact with the end face of the recess (for example, the upper end face of the head 21A) are both flat, the wiping member properly contacts the end face Since it is properly mounted in the recess in the above state, the assemblability is improved.

  The width of the side surfaces of the cover member (for example, the upper side surface portion 16 and the lower side surface portion 17) toward the opening of the mold (for example, the upper mold 41 and the lower mold 42) at the time of molding By inclining so as to spread, removal of the molded product from the mold can be performed smoothly, and the manufacturing process by molding can be made efficient.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the whole structure of the wiper blade 1 provided with the cover member of embodiment of this invention. It is AA sectional drawing of FIG. It is a sectional view showing a cover member of an embodiment of the present invention. It is sectional drawing which shows the mode of shaping | molding of the cover member of embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described based on the attached drawings.
FIGS. 1 and 2 show a wiper blade 1 provided with a hood 10 which is a cover member of the present embodiment. In addition, in FIG. 1, the structure accommodated in the food | hood 10 is illustrated by making the food | hood 10 into a cross section.

  As illustrated, the wiper blade 1 has a blade portion 2 which is a wiping member for wiping a surface to be wiped (for example, a glass surface of a vehicle), a support portion 3 supporting the blade portion 2, and the outer side of the support portion 3. A hood 10, which is a cover member to be covered, and an end cap 4 provided at both side ends of the support portion 3 to close the end of the hood 10 are provided.

  The blade unit 2 includes a wiping unit 21 disposed below the wiper blade 1 and a bar tibler 22 disposed along the wiping unit 21. The wiping portion 21 is an elongated member that constitutes the main body of the wiping member, and is made of, for example, rubber, and has an upper (supporting portion 3 side) head 21A and a lower side (target surface side) leg 21B , And a neck 21C whose width is narrowed between the head 21A and the legs 21B. When the wiper blade 1 is used, the lower end of the leg portion 21B is disposed in contact with the surface to be wiped, and is moved along the surface to be wiped, whereby the surface to be wiped is wiped. The upper end face of the head 21A is flat.

  The barticle 22 is an elongated member having substantially the same length as the wiping portion 21 and is made of, for example, metal. The force exerted from the support portion 3 to the wiping portion 21 is evenly distributed over the entire longitudinal direction of the wiping portion 21 by the barticle 22. The bird's-eye view 22 has a substantially U-shaped cross-sectional shape such that the head 21A of the wiping portion 21 is just accommodated, and both holding pieces 22A extend inward from the lower end of the U-shaped cross section. Are mounted on the head 21A by being disposed so as to hold the head 21A from below.

  The support portion 3 includes a primary lever 31 disposed at the center in the longitudinal direction, a secondary lever 32 pivotally connected to both end portions of the primary lever 31, and one end of the secondary lever 32 (longitudinal direction of the wiper blade 1 And a yoke lever 33 rotatably connected to the outer end of The other end of the secondary lever 32 (the end on the inner side in the longitudinal direction of the wiper blade 1) and the both side ends of the yoke lever 33 are claw portions 34 and 35 for gripping the blade portion 2, respectively. On the other hand, a clip holder 36 is provided on the upper portion of the primary lever 31 so that connection to a wiper arm (not shown) is made via a coupling member (not shown) attached to the clip holder. It has become.

  The hood 10 is a flexible cylindrical member, for example, made of rubber, as shown in cross section in FIG. 3 before being incorporated into the wiper blade 1. The entire support portion 3 is covered with the hood 10 by being accommodated in the hollow portion 11 (inner side of the cylindrical shape) of the hood 10. On the other hand, the outer surface of the lower end portion of the hood 10 is formed with a recess 12 in which the head 21A of the wiping unit 21 is accommodated (mounted).

  As well shown in FIG. 2, the wiping portion 21 of the blade portion 2 is disposed outside the hood 10 with the head 21 A housed in the recess 12, and the burt roller 22 is disposed in the hollow portion 11 of the hood 10. , Are arranged respectively. As a result, a part of the hood 10 is sandwiched between the head 21A of the wiping unit 21 and the bird's-eye view 22.

  As well shown in FIG. 3, the recess 12 of the hood 10 has a flat end face 13 in the deepest part, side faces 14 on both sides continuous with both sides of the end face 13, and a bent portion between the end face 13 and the side faces 14 on both sides And R portions 15 on both sides. The R portion 15 is formed in a gentle curved shape (R shape). Thus, no corner is present in the recess 12. Therefore, it is possible to appropriately prevent the occurrence of a crack that easily occurs in the corner. Further, since the end face 13 is a flat surface like the upper end face of the head 21A of the wiping portion 21, the head 21A is in the recess 14 with the upper end face properly contacting the end face 13. It is supposed to be properly housed.

  Both side surfaces 14 of the recess 12 have a substantially flat shape, and have a shape (underless shape) in which there is no inward protrusion on the lower end portion 18A side of the recess 12. Therefore, when assembling the hood 10 to the blade portion 2, the head 21A of the wiping portion 21 is smoothly mounted in the recess 12 with respect to the recess 12 where the overhanging portion does not exist. . In addition, after the hood 10 is assembled to the blade portion 2, the lower end portion 18A of the recess 12 is elastically deformed toward the neck portion 21C of the wiping portion 21 as shown in FIG.

  The side portions on both sides of the hood 10 are composed of a substantially flat upper side surface portion 16 and a substantially flat lower end side surface portion 17 continuous with the lower side surface portion 16. The upper side surface parts 16 on both sides are inclined such that the width of the upper side parts 16 spreads toward the lower side. On the other hand, the lower side surface portions 17 on both sides are inclined in the opposite direction to the upper side surface portion 16 so that the width of each other narrows toward the lower side.

  In the hood 10, the bent portion of the recess 12 other than the R portion 15 is also formed in an R shape (curved surface shape) instead of a square shape. That is, the lower end portion 18A of the recess 12, the bent portion 18B between the upper side surface portion 16 and the lower side surface portion, and the upper end portion 18C of the upper side surface portion 16 all have an R shape. Thereby, excess thickness is less likely to occur at the time of molding also in the lower end portion 18A, the bent portion 18B, and the upper end portion 18C.

  In FIG. 4, the mode of manufacture by shaping | molding of the food | hood 10 is shown with sectional drawing. As illustrated, the hood 10 is formed using the upper mold 41, the lower mold 42, and the core 43 by any molding method such as compression molding, transfer molding, dip molding and the like. In such molding, the bent portion in the recess 12 of the hood 10 is formed by the curved R-shaped portion 15, and since there is no corner on the inner peripheral surface of the hood 10, it is likely to occur at the corner The occurrence of cracks can be properly prevented. The upper mold 41 and the lower mold 42 are less likely to be worn because there is no corner on the inner circumferential surface.

  Further, the upper side surface portion 16 formed by the upper mold 41 and the lower side surface portion 17 formed by the lower mold 42 have widths toward the openings of the upper mold 41 and the lower mold 42, respectively. Since it has a shape that becomes wider, the molded product can be pulled out smoothly from the mold. Thus, the manufacturing efficiency of the hood 10 is improved.

  In the above embodiment, the curved portion in the concave portion 12 has a curved surface shape is only the R portion 15 between the end face 13 and the both side faces 14, but the present invention is not limited to such a form . Any of the bent portions produced according to the shape of the head of the wiping member housed in the recess may have a curved shape.

REFERENCE SIGNS LIST 1 wiper blade 2 blade portion 3 support portion 4 end cap 10 hood 11 hollow portion 12 recessed portion 13 end surface 14 side surface 15 R portion 16 upper side surface portion 17 lower side surface portion 21 wiping portion 21A head 21B head 21B leg 21C neck 22 baribura 22A holding 31 primary lever 32 secondary lever 33 yoke lever 34 claw 35 claw 36 clip holder

According to the present invention, in a wiper blade cover member for covering a blade supporting member provided on a wiper blade, the lower end portion is provided with a recess for accommodating at least a part of the wiping member of the wiper blade It is formed in a shape, and it comprises an upper side surface part and a lower side surface part connected to the lower side of the upper side surface part on both side parts, and the upper side surface parts on both sides are mutually widthwise toward the lower side. The lower side portions on both sides are inclined such that the width of the lower side portions narrows toward the lower side.

The upper side surface portions on both sides and the lower side surface portions on both sides may be inclined such that the width of the upper side surface portions and the lower side surface portions on both sides expand toward the opening of the mold at the time of molding.

Claims (4)

In a wiper blade cover member for covering a blade support member provided on a wiper blade,
A recess for receiving at least a part of the wiping member of the wiper blade;
The cover member for wiper blades in which the bent part in the crevice is formed in curved surface shape.   The cover member for a wiper blade according to claim 1, wherein the recess has an end surface and side surfaces on both sides of the end surface, and a bent portion between the end surface and the side surface is formed in a curved shape.   The wiper blade cover member according to claim 2, wherein the end face of the recess and the portion of the wiping member contacting the end face of the recess when being accommodated in the recess are both flat.   The wiper blade according to any one of claims 1 to 3, wherein the side surface portions on both sides of the cover member are inclined such that the widths of the side surfaces extend toward the opening of the mold at the time of molding. Cover member.

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