JP2011218853A - Wiper blade device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper blade device having high wiping-out properties to various vehicle models.SOLUTION: Both sides of a head 17a of a longitudinally formed blade rubber 17 are formed with installation grooves 17c, and each installation groove 17c is installed with a vertebra 16 wider than the installation groove 17c. A first rail 21a is slidingly engaged with a section of each vertebra 16 protruded from the blade rubber 17, and holder members 21 are installed to the blade rubber 17 through the vertebras 16. An engaged groove 31d is slidingly engaged with each second rail 21d of the holder member 21 to detachably install a fin member 31 to the holder member 21. A sub vertebra 41 is installed between the holder members 21 and the fin members 31, and spring properties of the vertebra 16 are complemented by the sub vertebra 41.

Description

  The present invention relates to a wiper blade that is attached to the tip of a wiper arm and wipes a windshield glass of a vehicle.

  As a wiper blade used in a wiper device of a vehicle such as an automobile, for example, as disclosed in Patent Document 1, a blade bar (plate spring) that is curved in the glass surface direction is attached to the head portion of a blade rubber, and the elasticity of this vertex bra There is a so-called flat blade type in which the pressing force applied from the wiper arm is distributed in the longitudinal direction by deformation to uniformly contact the entire blade rubber with the windshield glass.

  In such a flat blade type wiper blade, in order to improve the followability of the blade rubber to the windshield glass whose curvature changes greatly, and to improve its wiping property, the bent shape of the vertebra attached to the blade rubber is It is made to differ in each part of a longitudinal direction according to the shape of a glass surface.

Registered Utility Model No. 3107550

  However, since the shape of the windshield glass and the pressing force applied to the wiper blade by the wiper arm are different for each vehicle type, even if the bending shape of the vertebra attached to the blade rubber is different in the longitudinal direction, depending on the vehicle type, the blade In some cases, the pressing force applied to the rubber is insufficient, and the wiping performance of the wiper blade cannot be sufficiently improved.

  An object of the present invention is to provide a wiper blade capable of obtaining high wiping performance for various vehicle types.

  The wiper blade of the present invention is a wiper blade that is attached to the tip of a wiper arm and wipes a windshield glass of a vehicle, and has a long blade rubber provided with mounting grooves extending in the longitudinal direction on both side surfaces, and a long blade rubber. A pair of vertebras that are formed in a plate-like shape and are mounted in the corresponding mounting grooves, and a pair of first engaging portions that are respectively engaged with the corresponding vertebras, and are attached to the blade rubber via the vertebra. A holder member to be mounted; an engaged portion that engages with a second engaging portion of the holder member; a long fin member that is detachably mounted on the holder member; and a long plate shape A wiper blade formed and having a subvertebra mounted between the holder member and the fin member.

  The wiper blade according to the present invention is characterized in that the fin member has a cross-sectional shape that is uniform and solid in the longitudinal direction.

  In the wiper blade of the present invention, a plurality of air vent holes penetrating in the wiping direction are arranged in the longitudinal direction between the first engagement portion and the second engagement portion of the holder member. It is characterized by.

  According to the present invention, in addition to the vertebra attached to the blade rubber, the subvertebra is attached between the holder member and the fin member, and this subvertebra supplements the spring characteristics of the vertebra. The wipeability of the wiper blade can be improved for various vehicle types. In addition, since the fin member is detachably attached to the holder member, it is possible to attach a fin member having an optimum shape for each vehicle type, and to improve the wiping property of the wiper blade when the vehicle is traveling. Furthermore, since the subvertebra is mounted between the holder member and the fin member, the pressing force generated when the fin member receives the traveling wind can be reliably transmitted to the blade rubber by the subvertebra. Thereby, the wiping property of a blade rubber can further be improved.

  According to the present invention, the fin member is formed so that the cross-sectional shape is uniform in the longitudinal direction and solid, so that the length differs for each vehicle type by cutting the fin member at a desired length. Multiple types of wiper blades can be easily accommodated. Thereby, the versatility of a fin member can be improved and the cost of this wiper blade can be reduced. Further, since the fin member is formed solidly, the traveling wind received by the fin member can be reliably converted into a pressing force and transmitted to the blade rubber.

  According to the present invention, since the holder member is provided with the air vent hole penetrating in the wiping direction, the Karman vortex generated on the back side of the wiper blade by the traveling wind passing above the fin member is It can be reduced by the traveling wind that has passed. As a result, after the wiper blade reverses, the water wiping by the wiper blade is suppressed again by the negative pressure of the Karman vortex, and the wiper blade is wiped off when the vehicle travels. The sex can be further enhanced.

It is a perspective view of the wiper blade which is one embodiment of the present invention. It is sectional drawing which follows the AA line in FIG. It is a perspective view which shows the state which fixed the vertebra and the subvertebra to the center bracket. It is a perspective view which shows the positioning structure of the subvertebra bra to a center bracket. It is a perspective view which shows the state which mounted | wore with the blade rubber between the vertebras shown in FIG. It is a perspective view which shows the holder member before mounting | wearing with a blade rubber. It is a perspective view which shows the fin member before mounting | wearing with a holder member. It is a perspective view which shows the state before attachment of a center cover and an end cap. It is explanatory drawing which shows the flow of the driving | running | working wind around the wiper blade shown in FIG.

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

  A wiper blade 11 shown in FIG. 1 is used in a wiper device mounted on a vehicle such as an automobile. The wiper blade 11 is attached to the tip of the wiper arm 12 of the wiper device, and swings on the windshield glass (not shown) of the vehicle together with the wiper arm 12 to wipe the windshield glass.

  A center bracket 13 which is a portion where the wiper blade 11 is attached to the wiper arm 12 is formed by bending a steel plate punched into a predetermined shape, and is bent into a U shape as shown in FIGS. Main body portion 13a and four fixed leg portions 13b (only three are shown in FIG. 4) protruding from the main body portion 13a. As shown in FIG. 1, a clip 15 is rotatably attached to a main body 13 a of the center bracket 13 by a pin member 14, and a U hook provided at the tip of the wiper arm 12 is engaged with the clip 15. Thus, the wiper blade 11 is attached to the tip of the wiper arm 12 so as to be rotatable about the pin member 14.

  As shown in FIG. 3, a pair of vertebra 16 is fixed to the center bracket 13. Each of these vertebras 16 is formed in a long plate shape by a steel plate, and is arranged side by side in the width direction (wiping method) with a space between each other, and a corresponding pair of center brackets 13 in the center portion in the longitudinal direction. Is engaged with the fixed leg portion 13b. Then, each of the fixed leg portions 13b is caulked to fix the vertebra 16 to the corresponding fixed leg portion 13b. In the natural state, each vertical bar 16 fixed to the center bracket 13 is curved such that the center part in the longitudinal direction is recessed in the direction away from the windshield glass than the both end parts, and the center bracket 13 is centered. As shown in FIG.

  On the other hand, the blade rubber 17 used in the wiper blade 11 is formed in a long bar shape whose cross-sectional shape is uniform in the longitudinal direction, and as shown in FIG. 2, the head portion 17a and the lip portion 17b are formed. I have. The head portion 17a has a substantially rectangular cross section, and mounting grooves 17c extending from one end in the longitudinal direction to the other end are provided on both side surfaces facing the wiping direction. The corresponding vertebra 16 is inserted into the mounting grooves 17c from one end in the longitudinal direction. As a result, as shown in FIGS. 2 and 5, the blade rubber 17 is mounted with the vertebra 16 corresponding to each mounting groove 17c. It becomes a state and is held by the vertical bar 16. In other words, the blade rubber 17 is held in a state in which the head portion 17a is sandwiched between the vertebras 16 by inserting each vertebra 16 into the mounting groove 17c in a sliding manner.

  The width dimension of the mounting groove 17c of the blade rubber 17 in the wiping direction, that is, the depth dimension of the groove is set to be smaller than the width dimension of the vertebra 16 in the wiping direction (1/2 in the illustrated case). As a result, as shown in FIGS. 2 and 5, the vertebra 16 mounted in each mounting groove 17 c partially protrudes from the mounting groove 17 c and protrudes in the wiping direction from both side surfaces of the head portion 17 a. Yes. Note that the length dimensions of the vertebra 16 and the blade rubber 17 are the same.

  The lip portion 17b of the blade rubber 17 is a portion that contacts the windshield glass. When the pressing force from the wiper arm 12 is applied to the center bracket 13 and the lip portion 17b contacts the windshield glass, each vertebra 16 Is elastically deformed in the direction along the windshield glass together with the lip portion 17b, that is, the blade rubber 17. As a result, the pressing force from the wiper arm 12 is uniformly distributed throughout the longitudinal direction of the blade rubber 17, and the blade rubber 17 comes into contact with the windshield glass at a predetermined distribution pressure.

  Holder members 21 are mounted on the both sides of the blade rubber 17 in the longitudinal direction across the center bracket 13 via the respective vertebra 16.

  As shown in FIG. 6, the holder member 21 connects the pair of first rail portions 21 a that are arranged at intervals in the wiping direction and the first rail portions 21 a that are arranged side by side at intervals in the longitudinal direction. The first rail portion 21a has a length corresponding to a portion between the longitudinal end of the center bracket 13 and the longitudinal tip of the blade rubber 17. The dimension is set.

  The first rail portion 21a is provided with a first engagement groove 21c as a first engagement portion that faces the inside of the wiping direction so as to face each other and extends from one end to the other end in the longitudinal direction. As shown in FIGS. 2 and 7, the holder member 21 engages the first engaging groove 21 c with a portion protruding from the mounting groove of the vertebra 16 in a sliding manner from the end in the longitudinal direction. It is attached to the blade rubber 17 via.

  The holder member 21 is formed by cutting an extruded polypropylene resin. The overall shape of the holder member 21 is curved in the longitudinal direction as with the vertebra 16, and the degree of curvature is increased or decreased as with the vertebra 16. It can be elastically deformed in the direction of movement. When the pressing force from the wiper arm 12 is applied to the wiper blade 11, the holder member 21 together with the vertebra 16 and the blade rubber 17 is also elastically deformed into a shape along the windshield glass.

  The holder member 21 is provided with a pair of second rail portions 21d. The second rail portions 21d are formed to extend from one end to the other end in the longitudinal direction of the holder member 21 along the corresponding first rail portions 21a. As shown in FIG. The second engaging groove 21e is provided as a second engaging portion that faces the surface. Each holder member 21 is detachably mounted with a fin member 31 by slidingly engaging with the second engagement groove 21e of the second rail portion 21d.

  As shown in FIG. 7, the fin member 31 is formed in a long shape including a fin main body portion 31 a and a base portion 31 b, and the length dimension thereof is set to be the same as the corresponding holder member 21. . The cross-sectional shape of the fin member 31 is uniform in the longitudinal direction, and is formed solid (not hollow) over the entire longitudinal direction. The fin body portion 31a is formed of an elastomer, and the base portion 31b is formed of a polypropylene resin, and these two-color molded products are extruded so as to have a predetermined cross-sectional shape, and then formed into a desired length. A long fin member 31 is formed by cutting. In this way, the fin body portion 31a and the base portion 31b are integrally formed.

  The fin body portion 31a has a fin shape with a substantially triangular cross section provided with an inclined surface that gently slopes in the wiping direction. On the other hand, as shown in FIG. 2, the base portion 31b includes a concave portion 31c extending in the longitudinal direction on the bottom surface facing the holder member 21, and the concave portion 31c is engaged as a pair of engaged portions. A groove 31d is provided. These engaged grooves 31d face each other inward of the wiping direction and extend from one end to the other end in the longitudinal direction of the base portion 31b. The fin member 31 is slidably engaged with the second engagement groove 21e of the holder member 21 from the longitudinal end portion thereof as shown in FIG. 2 and FIG. 21 is detachably mounted.

  The fin member 31 is formed in a shape curved in the longitudinal direction corresponding to the vertebra 16 and the holder member 21, and can be elastically deformed in a direction to increase or decrease the degree of curvature similarly to the vertebra 16 and the holder member 21. When the blade rubber 17 comes into contact with the windshield glass and the pressing force from the wiper arm 12 is applied to the wiper blade 11, the fin member 31 is also elastically deformed along the windshield glass together with the vertebra 16 and the holder member 21. .

  As shown in FIG. 2, a sub-vertebra 41 is mounted between the holder member 21 and the fin member 31 in order to complement (correct) the spring characteristics of the vertical bar 16.

  As can be seen from FIG. 3, the subvertebra 41 is formed in a long plate shape with a steel plate or the like, the length dimension is the same as that of the vertibra 16, and the width dimension is wider than the vertibra 16. Yes. As shown in FIG. 4, two cutouts 41 a arranged at intervals in the longitudinal direction are provided on one side of the central portion in the longitudinal direction of the subvertebra 41. The subvertebra 41 is engaged in the notches 41a with the fixed legs 13b of the center bracket 13, and the fixed legs 13b are caulked so that the subvertebras 41 are sandwiched between them. The center bracket 13 is fixed in a positioned state.

  As shown in FIG. 7, when the holder member 21 is attached to the blade rubber 17 via the vertebra 16, the subvertebra 41 is placed over the second rail portion 21 d of the holder member 21. In addition, as shown in FIG. 2, on the bottom surface side of the recess 31c of the base portion 31b of the fin member 31, a receiving groove 31e for receiving the subvertebra 41 is provided from one end to the other end in the longitudinal direction of the base portion 31b. It extends to the point. When the fin member 31 is attached to the holder member 21, the subvertebra 41 is inserted into the receiving groove 31e from one end in the longitudinal direction in a sliding manner. That is, when the fin member 31 is mounted on the holder member 21, the subvertebra 41 is placed in the receiving groove 31 e and is disposed between the fin member 31 and the holder member 32.

  As shown in FIG. 8, when the fin member 31 is attached to the holder member 21, end caps 51 are attached to both ends of the wiper blade 11 in the longitudinal direction, and a center cover 52 is attached to the longitudinal center. Installed. The blade rubber 17, the holder member 21, and the fin member 31 are fixed to each other by the end cap 51 and the center cover 52, and these assembled states are maintained.

  Here, the subvertebra 41 is formed in a shape that is curved in the longitudinal direction, similarly to the vertebra 16, and is elastically deformable in a direction in which the degree of curvature is increased or decreased, similarly to the vertebra 16. Thus, when the blade rubber 17 comes into contact with the windshield glass and the pressing force from the wiper arm 12 is applied to the wiper blade 11, the subvertebra 41 is elastically deformed into a shape along the windshield glass together with the vertibra 16. Complements the spring characteristics of

  As described above, in the wiper blade 11, the subvertebra 41 is attached between the holder member 21 and the fin member 31 in addition to the pair of vertibra 16 attached to the blade rubber 17. The bra 41 complements the spring characteristics of the vertebra 16 and can improve the wipeability of the wiper blade 11 for various vehicle types. In other words, according to the shape of the windshield glass and the pressing force from the wiper arm 12 that are different for each vehicle type, the bending shape of the vertebra 16 attached to the blade rubber 17 is made different in each part in the longitudinal direction, and the subvertebra 41 By varying the bending shape at each part in the longitudinal direction, the adjustment range of the spring characteristics can be widened, and the wiper blade 11 can be adapted to various vehicle types.

  Further, in this wiper blade 11, the fin member 31 is slidably attached to the holder member 21 so that it can be attached to and detached from the holder member 21. The member 31 can be easily replaced. Thereby, the optimal fin member 31 can be mounted | worn for every vehicle model, and the wiping property at the time of vehicle travel of this wiper blade 11 can be improved.

  Further, in the wiper blade 11, the subvertebra 41 is mounted between the holder member 21 and the fin member 31, so that the pressing force generated when the fin member 31 receives the traveling wind is applied by the subvertebra 41. The blade rubber 17 can be reliably transmitted. Thereby, the wiping property of the wiper blade 11 can be further enhanced.

  Further, in the wiper blade 11, the fin member 31 is formed so that the cross-sectional shape is uniform and solid in the longitudinal direction, so that the fin member 31 is cut to a desired length for each vehicle type. It is possible to easily cope with a plurality of types of wiper blades 11 having different sizes. Thereby, the versatility of the fin member 31 can be improved and the cost of this wiper blade 11 can be reduced. Further, since the fin member 31 is formed in a solid shape, the traveling wind received by the fin member 31 can be reliably converted into a pressing force and transmitted to the blade rubber 17, whereby a wiper during vehicle traveling can be obtained. The wiping property of the blade 11 can be further enhanced.

  FIG. 9 is an explanatory view showing the flow of traveling wind around the wiper blade shown in FIG.

  In the wiper blade 11, the traveling wind that has flowed above the fin member 31 generates a Karman vortex on the back side of the wiper blade 11, and water swept out of the wiping range by the negative pressure of the Karman vortex is within the wiping range. The holder member 21 is provided with an air vent hole 61 in order to prevent the water pulling phenomenon from being drawn again.

  As shown in FIG. 2, the second rail portion 21d of the holder member 21 is perpendicular to the glass surface of the windshield glass with respect to the first rail portion 21a (a direction perpendicular to the longitudinal direction and the wiping direction). They are arranged with a predetermined gap (1 mm in the illustrated case), and are connected to corresponding first rail portions 21a by connecting portions 21b. As a result, as shown in FIGS. 2 and 9, the holder member 21 penetrates the holder member 21 in the wiping direction between the first rail portion 21a and the second rail portion 21d of the holder member 21 and is partitioned into a connecting portion 21b. Three air vent holes 61 arranged in the longitudinal direction are provided.

  As shown in FIGS. 2 and 9, during traveling of the vehicle, a part of the traveling wind that flows toward the wiper blade 11 is splashed upward by the fin member 31. Thereby, the lift of the wiper blade 11 is reduced, and the wiping performance of the wiper blade 11 during vehicle travel is improved. On the other hand, a part of the traveling air flows from the front side of the wiper blade 11 to the back side (rear side) through the air vent hole 61 provided in the holder member 21. The traveling wind that has flowed above the fin member 31 merges with the traveling wind that has passed through the ventilation holes 61 on the rear side of the fin member 31 and flows to the rear side of the wiper blade 11 without generating Karman vortices. That is, the traveling wind that has flowed above the fin member 31 is guided rearward by the traveling wind that has passed through the air vent hole 61 of the holder member 21, and the generation of Karman vortices on the back side of the wiper blade 11 is suppressed. Can do.

  As described above, in the wiper blade 11, the holder member 21 is provided with the air vent hole 61 penetrating in the wiping direction. Therefore, the travel air that has passed over the fin member 31 has been passed through the air vent hole 61. In addition, it is possible to prevent the Karman vortex from being generated on the back side of the wiper blade 11 due to the traveling wind by flowing behind the wiper blade 11. As a result, after the wiper blade 11 is reversed, the water wiping by the wiper blade 11 is restrained from occurring due to the negative pressure of the Karman vortex being drawn back into the wiping range. The wiping property when the vehicle is running can be improved.

  Next, a manufacturing procedure of the wiper blade 11 will be briefly described.

  First, as shown in FIG. 3, a pair of vertebra 16 and one subvertebra 41 are fixed to the center bracket 13 by caulking, and then, as shown in FIG. Mounted in a sliding manner. Next, as shown in FIGS. 6 and 7, the holder member 21 is slidably mounted on the outside of the vertebra 16, and the fin member 31 is slidably mounted on the holder member 21. Finally, the pair of end caps 51 and the center cover 52 are attached to complete the wiper blade 11.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the holder member 21 and the base portion 31b of the fin member 31 are formed of polypropylene resin, and the fin body portion 31a of the fin member 31 is formed of elastomer. As long as each material is flexible, for example, the fin body portion 31a may be formed of resin, or the holder member 21 and the base portion 31b may be formed of elastomer.

DESCRIPTION OF SYMBOLS 11 Wiper blade 12 Wiper arm 13 Center bracket 13a Main body part 13b Fixed leg part 14 Pin member 15 Clip 16 Vertibra 17 Blade rubber 17a Head part 17b Lip part 17c Mounting groove 21 Holder member 21a 1st rail part 21b Connection part 21c 1st engagement Groove (first engaging part)
21d 2nd rail part 21e 2nd engaging groove (2nd engaging part)
31 Fin member 31a Fin body part 31b Base part 31c Recess 31e Housing groove 31d Engagement groove (engaged part)
41 Subvertebra 41a Notch 51 End cap 52 Center cover 61 Ventilation hole

Claims (3)

A wiper blade attached to the tip of the wiper arm to wipe the windshield glass of the vehicle,
A long blade rubber provided with mounting grooves extending in the longitudinal direction on both side surfaces;
A pair of vertebras each formed in a long plate shape and mounted in the corresponding mounting groove;
A pair of first engaging portions that engage with the corresponding vertebra, respectively, and a holder member that is attached to the blade rubber via the vertebra;
An elongated fin member that includes an engaged portion that engages with a second engaging portion of the holder member, and is detachably attached to the holder member;
A wiper blade formed in a long plate shape and having a subvertebra attached between the holder member and the fin member.   2. The wiper blade according to claim 1, wherein the fin member has a cross-sectional shape that is uniform and solid in the longitudinal direction.   The wiper blade according to claim 1 or 2, wherein a plurality of air vent holes penetrating in the wiping direction are arranged in the longitudinal direction between the first engagement portion and the second engagement portion of the holder member. A wiper blade characterized by being made.

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