JP2007153111A - Wiper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper which connects pivot holder pairs to each other by using a hollow frame, is modularized by mounting a wiper motor on the frame, and firmly fixes the pivot holder pairs and the wiper motor to the hollow frame. <P>SOLUTION: A U-shaped connection part 26 which is formed non-hollow and U-shaped in section is provided on a hollow frame 23 for connecting pivot holders 11, 12 on the other side of the longitudinal direction, and a mounting flat seat face for mounting a wiper motor 40 is provided on the U-shaped connection part 26. A square prismatic frame connection part 22 to be fitted in the U-shaped connection part 26 is provided on the pivot holder 12 on the side to be connected to the U-shaped connection part 26. The frame connection part 22, i.e., the pivot holder 12 is fastened and fixed to the hollow frame 23 together with the wiper motor 40 fixed to a mounting flat seat face by mounting bolts 31a, 32a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiper device for wiping a windshield (windshield glass) of an automobile.

  In a wiper device for wiping a windshield of an automobile, a pivot holder that rotatably supports a pair of pivot shafts for fixing a base end portion of a wiper arm is connected to each other by a frame member, and the frame member In addition, a module in which a wiper motor as a driving source is fixed and modularized is known. As such a frame member, a hollow frame that is lightweight and has high rigidity is generally used as shown in Patent Documents 1 and 2, for example, in accordance with recent further reduction in weight of automobiles.

  In the wiper device of Patent Document 1, a cylindrical hollow frame for connecting a pair of pivot holders to each other is used, and one pivot holder is attached to one end of the frame. A wiper motor is attached to the other end of the hollow frame together with the other pivot holder. In this case, the pivot holder and the wiper motor are each provided with a bracket, the other end of the hollow frame is sandwiched between the holder side bracket and the motor side bracket, and a mounting bolt is inserted between the brackets so as to penetrate the frame. Tighten with nuts. Thus, the other pivot holder and the wiper motor are attached to the other end of the hollow frame.

  However, if the mounting bolts are tightened to firmly fix the other pivot holder and wiper motor to the other end of the hollow frame, the other end of the hollow frame sandwiched between both the holder side and motor side brackets will be deformed. As a result, the bolt could not be firmly fixed, and the workability was poor using nerves for the bolt tightening torque.

  Therefore, it is conceivable to change the pipe diameter of the frame in order to further improve the rigidity of the hollow frame, but the surface on which the hollow frame of the holder side bracket or the motor side bracket abuts is the outer periphery of the hollow hollow frame. Since the curved surface shape conforms to the curved surface shape of the surface, it is necessary to change the shapes of both brackets in a measure such as changing the pipe diameter of the hollow frame. Therefore, it cannot be said that it is a preferable measure from the viewpoint of versatility.

  On the other hand, in the wiper device of Patent Document 2, each cylindrical end of the hollow frame is fitted and crimped to a connecting portion having a circular cross section provided in a pair of pivot holders, and is attached to a longitudinal intermediate portion of the frame. A mounting portion for mounting the wiper motor is provided. The attachment part is formed into a U-shaped cross section while being non-hollow by press working with respect to the part that was originally hollow like the end part. And the wiper motor is attached with the attachment volt | bolt with respect to the attachment flat seat surface formed in the opposite opening side of the attaching part which makes cross-sectional U shape.

As a result, the wiper motor is fastened and fixed to the mounting portion processed non-hollow at the intermediate portion of the hollow frame, so that the mounting portion is not deformed even if the tightening is strengthened. Therefore, the wiper motor can be firmly fixed, and the tightening operation can be easily performed. In addition, since the wiper motor is mounted on the mounting flat seat surface of the mounting section, even when the pipe diameter of the hollow frame is changed, the mounting portion on the wiper motor side is only changed slightly. There is no need to change the planar shape unless there is a significant change. Therefore, it was excellent also in terms of versatility.
JP 2002-362327 A Japanese Patent No. 3215671

  However, in the wiper device disclosed in Patent Document 2, each end of the hollow cylindrical frame is fixed to the connecting portion having a circular cross section of each pivot holder and fixed by caulking. There is a concern that the pivot holder has a low rigidity in the direction in which the pivot holder is about to rotate, and the pivot holder is not stably fixed.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to connect a pair of pivot holders to each other using a hollow frame and attach a wiper motor to the frame to modularize the wiper. An object of the present invention is to provide a wiper device capable of firmly fixing a pivot holder and a wiper motor to a hollow frame.

  In order to solve the above-described problems, in the invention described in claim 1, at least a pair of pivot holders that rotatably support a pivot shaft for supporting a wiper arm are connected to each other by a hollow frame formed of a pipe material. And a module-type wiper device comprising a mechanism for fixing a wiper motor to the hollow frame and converting the rotational movement of the wiper motor into a pivoting movement of the pivot shaft to be a swinging movement of the wiper arm. The hollow frame has a U-shaped connecting portion formed into a U-shaped cross section at the one end in the longitudinal direction by crushing the pipe material, and the wiper motor is provided in the U-shaped connecting portion. The pivot holder that has a mounting flat seat surface for mounting and is connected to the U-shaped connecting portion is fitted into the U-shaped connecting portion, That together with the wiper motor fixed to serial mounting flat bearing surface has a frame connecting part which is fastened at fastening member as its gist.

  According to the same configuration, the hollow frame that connects the pivot holders is provided with a U-shaped connecting portion that is crushed into a non-hollow shape at one end in the longitudinal direction and formed into a U-shaped cross section, An attachment flat seat surface for attaching the wiper motor to the U-shaped connecting portion is provided. Further, the pivot holder connected to the U-shaped connecting portion is provided with a frame connecting portion that is fitted into the U-shaped connecting portion. The frame connecting portion, that is, the pivot holder is fastened and fixed by the fastening member together with the wiper motor fixed to the mounting flat seat surface with respect to the hollow frame. As a result, the U-shaped connecting portion of the hollow frame is processed to be non-hollow, so that the fastening member is not deformed by the fastening and fixing, the strong fastening is possible, and the fixing posture of the wiper motor is stabilized. In addition, since the frame connecting portion is fitted in the U-shaped connecting portion and is fastened and fixed by the fastening member, the frame connecting portion, that is, the pivot holder is rotated in a direction to rotate with respect to the U-shaped connecting portion. The rigidity of the arm is also increased, and the fixed posture on the pivot holder side is also stabilized. Accordingly, the pivot holder and the wiper motor are firmly fixed to the hollow frame. Incidentally, the “U-shape” in the U-shaped connecting portion includes not only a right angle between the opposing side wall and the bottom wall but also a slight acute angle or an obtuse angle.

  According to a second aspect of the present invention, in the wiper device according to the first aspect, the U-shaped connecting portion of the hollow frame has the mounting flat seat surface formed on the side opposite to the bottom wall of the bottom wall. The gist of the present invention is to be sandwiched between the wiper motor and the frame connecting portion of the pivot holder.

  According to the same configuration, the U-shaped connecting portion of the hollow frame has a mounting flat seat surface on the side opposite to the opening of the bottom wall, and the wiper motor is mounted on the flat surface in contact therewith. Even if the bottom wall of the U-shaped connecting part is sandwiched between the wiper motor and the frame connecting part of the pivot holder and tightened and fixed with a tightening member, the pipe material of the hollow frame is matched to the strength. Can be selected for pipe diameters.

  According to a third aspect of the present invention, in the wiper device according to the first or second aspect, the U-shaped connecting portion of the hollow frame and the frame connecting portion of the pivot holder face each other in the U-shaped connecting portion. The gist is that a caulking portion in which the U-shaped coupling portion bites into the frame coupling portion is formed by caulking from the outer side surfaces of the pair of side walls toward the inner frame coupling portion.

  According to this configuration, the U-shaped connecting portion of the hollow frame and the frame connecting portion of the pivot holder are caulked from the outer surface of the pair of side walls facing each other toward the inner frame connecting portion. Thus, a caulking portion is formed in which the U-shaped connecting portion bites into the frame connecting portion. As a result, the U-shaped connecting portion of the hollow frame and the frame connecting portion of the pivot holder are more firmly fixed. Further, if caulking is performed before tightening of the tightening member, the U-shaped connecting portion of the hollow frame and the frame connecting portion of the pivot holder can be temporarily fixed, and at least an intermediate assembly comprising the hollow frame and the pivot holder. A solid (subassembly) can be handled easily.

  In particular, when applied to the invention of claim 2, a mounting flat seat surface for mounting the wiper motor is formed on the bottom wall of the U-shaped connecting portion, and a caulking portion is formed on a side wall different from the bottom wall. Will be formed. Therefore, the formation of the caulking portion prevents the mounting flat seat surface from being deformed and the flatness of the mounting flat seat surface is prevented from being lowered, so that the mounting state of the wiper motor can be maintained satisfactorily.

  According to a fourth aspect of the present invention, in the wiper device according to any one of the first to third aspects, at least the wiper motor and the hollow frame are provided with positioning means for positioning the wiper motor with respect to the hollow frame. The gist of this is

  According to this configuration, since at least the wiper motor and the hollow frame are provided with positioning means for positioning the wiper motor with respect to the hollow frame, the wiper motor can be more stably fixed to the hollow frame. There are advantages such as easy tightening.

  According to a fifth aspect of the present invention, in the wiper device according to any one of the first to fourth aspects, the fastening member is a mounting bolt and a nut, and the wiper motor is a mounting flat seat of the hollow frame. The gist of the present invention is to have a mounting portion for mounting on the surface, and the mounting portion has a nut holding portion for receiving and holding the nut.

  According to this configuration, the mounting portion provided in the wiper motor is provided with a nut holding portion that accommodates and holds the nut. Therefore, when attaching the wiper motor to the mounting flat seat surface of the hollow frame, an operator has to hold the nut. The assembly workability of the wiper device is improved.

  The invention according to claim 6 is the wiper device according to any one of claims 1 to 5, wherein the hollow frame has a cylindrical connecting portion formed in a hollow cylindrical shape at the other end in the longitudinal direction thereof. The gist of the pivot holder connected to the cylindrical connecting part is that it has a columnar or annular frame connecting part into which the cylindrical connecting part is fitted or fitted.

  According to this configuration, a cylindrical connecting portion is provided on the other longitudinal end of the hollow frame, and the pivot holder connected to the cylindrical connecting portion is a column or circle in which the cylindrical connecting portion is externally or internally fitted. An annular frame connection is provided. Thereby, on the other end side of the hollow frame, the pivot holder is slid along or rotated around the central axis of the cylindrical connecting part before final fixing of the cylindrical connecting part and the pivot holder. It is possible to adjust the distance between the paired pivot holders and the mutual posture. As described above, since the wiper motor and the pivot holder on the opposite side are firmly fixed to the one end side in the longitudinal direction of the hollow frame by the U-shaped connecting portion, the overall fixing strength of the wiper device of the present invention is , Both ends are sufficiently higher than in the prior art using a hollow frame with a cylindrical connecting part.

  Therefore, according to the present invention, a pair of pivot holders are connected to each other using a hollow frame and a wiper motor is attached to the frame to form a module, and the pivot holder and the wiper motor are attached to the hollow frame. A wiper device that can be firmly fixed can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows a wiper device 10 of the present embodiment. The wiper device 10 wipes a windshield (not shown) of an automobile, and is disposed in a cowl top panel (not shown) below the windshield.

  The wiper device 10 includes a pair of pivot holders 11 and 12. Each pivot holder 11 and 12 includes a cylindrical holder portion 11a and 12a, and a vehicle body side provided on the outer peripheral surface of the holder portion 11a and 12a. And mounting brackets 11b and 12b for mounting to the head.

  The pivot shafts 13 and 14 are inserted into the holder portions 11a and 12a of the pivot holders 11 and 12, and the pivot shafts 13 and 14 are rotatably supported. Each pivot shaft 13, 14 has a base end portion of a wiper arm (not shown) fixed at a tip portion protruding from the holder portions 11 a, 12 a, and a base end portion of each pivot lever 15, 16 is fixed at the base end portion. ing. The pivot shafts 13 and 14 rotate with the rotation of the pivot levers 15 and 16 based on the driving of a wiper motor 40 described later to swing the wiper arm.

  One pivot holder 11 is provided with a columnar frame connecting portion 21, and the other pivot holder 12 is provided with a quadrangular columnar frame connecting portion 22. A hollow frame 23 for connecting the pivot holders 11 and 12 to each other is mounted between the frame connecting portions 21 and 22.

  One end of the hollow frame 23 is a cylindrical connecting portion 25 having a cylindrical shape (annular cross section) so as to be fitted to the frame connecting portion 21 having a circular cross section of the pivot holder 11 described above. It is formed to be bent in a slightly square shape with the same cross-sectional shape up to substantially the middle part in the longitudinal direction. After the cylindrical connecting portion 25 is fitted onto the frame connecting portion 21, the cylindrical connecting portion 25 is caulked from the outer peripheral surface toward the inner frame connecting portion 21, and a plurality of caulks formed in advance at predetermined positions on the surface of the frame connecting portion 21. The corresponding portion of the cylindrical connecting portion 25 is inserted into the concave portion 21 a by being plastically deformed, and is fixed to the frame connecting portion 21.

  On the other hand, as shown in FIGS. 1 and 2, the other end of the hollow frame 23 is a U-shaped connecting portion 26 having a U-shaped cross section so as to be fitted to the square columnar frame connecting portion 22 described above. The U-shaped connecting portion 26 is formed in the same cross-sectional shape from the substantially middle portion in the longitudinal direction. In the middle portion of the hollow frame 23, the U-shaped cross-section and the cross-sectional annular shape on both sides in the longitudinal direction gradually change to each other shape (from the cylindrical connecting portion 25 toward the U-shaped connecting portion 26). The hollow portion is gradually reduced).

  Incidentally, this hollow frame 23 is originally formed of a cylindrical hollow pipe material, and the other end side is crushed by pressing so as to be non-hollow and formed into a U-shaped cross-section and connected in a U-shaped connection. A portion 26 is formed, and a gradually changing portion 27 is formed together with the U-shaped connecting portion 26. Therefore, the U-shaped connecting portion 26 has a structure in which two meat portions of the hollow frame 23 overlap each other as shown in FIGS. 3, 4, and 6, and has high rigidity.

  As shown in FIGS. 3 and 4, the U-shaped connecting portion 26 has a pair of opposing side walls 26 a and a bottom wall 26 b, and the inner surface of the bottom wall 26 b of the concave portion into which the frame connecting portion 22 is fitted. Are provided with two circular bolt insertion holes 26c and 26d and a circular pin insertion hole 26e arranged in parallel at substantially equal intervals from the end in the longitudinal direction. On the other hand, also in the frame connection part 22, two bolt insertion holes 22a and 22b and pin insertion holes 22c having positions and shapes corresponding to the insertion holes 26c to 26e are arranged in parallel. Further, a circular bolt insertion hole 26f and a similarly circular pin insertion hole 26g are provided in parallel on the bottom wall 26b on the side of the gradually changing portion 27 in the U-shaped connecting portion 26 from the gradually changing portion 27 side. Yes.

  The bolt insertion hole 26c of the U-shaped connecting portion 26 and the bolt insertion hole 22a of the frame connecting portion 22 are provided to fasten and fix the hollow frame 23 and the pivot holder 12 with mounting bolts 31a and nuts 31b. Yes. Further, the bolt insertion hole 26d of the U-shaped connecting portion 26 and the bolt insertion hole 22b of the frame connecting portion 22 fasten and fix the hollow frame 23, the pivot holder 12, and the wiper motor 40 with mounting bolts 32a and nuts 32b. It is provided for. Further, the bolt insertion hole 26f of the U-shaped connecting portion 26 is provided to fasten and fix the hollow frame 23 and the wiper motor 40 with the mounting bolt 33a and the nut 33b. The pin insertion holes 26e and 26g are used for positioning the wiper motor 40 when the hollow frame 23 and the wiper motor 40 are fastened and fixed.

  A mounting flat seat surface 26x for mounting the wiper motor 40 is provided on the surface opposite to the opening of the U-shaped connecting portion 26, that is, the outer surface of the bottom wall 26b, over the entire longitudinal direction of the U-shaped connecting portion 26. It is formed by. A mounting leg 44 (mounting portions 44a and 44b), which will be described later, provided on the wiper motor 40 is mounted on the mounting flat seat surface 26x in surface contact.

  The wiper motor 40 is configured by integrally assembling a motor unit 41 that rotates and a rotation unit 42 that decelerates and outputs rotation generated by the motor unit 41 with a reduction mechanism (not shown). A mounting leg 44 for mounting to the mounting flat seat surface 26x is provided integrally with the gear housing 43 of the speed reducing portion 42 that houses the speed reducing mechanism. The mounting leg 44 includes a mounting portion 44a provided corresponding to the bolt insertion hole 26d and the pin insertion hole 26e on the longitudinal end portion side of the mounting flat seat surface 26x, and a bolt insertion hole 26f and a pin on the longitudinal intermediate portion side. And an attachment portion 44b provided corresponding to the insertion hole 26g.

  One mounting portion 44a has a circular bolt insertion hole 44c provided corresponding to the bolt insertion hole 26d of the mounting flat seat surface 26x, and a nut holding portion recessed so as to be continuous with the bolt insertion hole 44c. 44d, and a pin insertion hole 26e of the mounting flat seat surface 26x and a positioning pin 44e fitted into the pin insertion hole 22c of the frame connecting portion 22 are provided. The other mounting portion 44b has a circular bolt insertion hole 44f provided corresponding to the bolt insertion hole 26f of the mounting flat seat surface 26x, and a nut holding portion recessed so as to be continuous with the bolt insertion hole 44f. 44g, and positioning pins 44h that are inserted into the pin insertion holes 26g of the mounting flat seat surface 26x.

  Here, fixing of the wiper motor 40 and the hollow frame 23 and the pivot holders 11 and 12 will be described. First, before attaching the wiper motor 40, the cylindrical connecting portion 25 at one end of the hollow frame 23 is fitted into the frame connecting portion 21 of one pivot holder 11 and fixed by caulking. The frame connecting portion 22 of the other pivot holder 12 is fitted into a U-shaped connecting portion 26 at the other end of the hollow frame 23, and the bolt insertion holes 22a, 22b, 26c, and 26d are arranged to correspond to each other. Thereafter, as shown in FIGS. 5 and 6, the U-shaped connecting portions 26 are caulked from the outer side surfaces of the opposing side walls 26 a toward the inner frame connecting portions 22, and the U-shaped connecting portions 26 are frame-connected. A caulking portion 35 that bites into the portion 22 is formed. Incidentally, four caulking portions 35 are respectively formed on one side wall 26a. In this case, like the frame connecting portion 21, four caulking concave portions 22d are formed in advance on the surface of the frame connecting portion 22 at predetermined positions opposed to the side walls 26a, respectively. Corresponding portions of the side wall 26a are inserted by being plastically deformed, and become caulked portions 35, respectively. In this way, the U-shaped connecting portion 26 is temporarily fixed to the frame connecting portion 22.

  Next, as shown in FIGS. 3 and 4, the mounting bolt 31a is inserted into the bolt insertion holes 22a and 26c of the frame connecting portion 22 and the U-shaped connecting portion 26, and tightened and fixed by the nut 31b. In addition, a positioning pin 44e provided on one attachment portion 44a of the wiper motor 40 is inserted into the pin insertion holes 26e and 22c of the U-shaped connection portion 26 and the frame connection portion 22 and is positioned on the other attachment portion 44b. The pin 44h is fitted into the pin insertion hole 26g of the U-shaped connecting portion 26, and the wiper motor 40 is disposed so as to come into surface contact with the mounting flat seat surface 26x of the U-shaped connecting portion 26.

  Next, the nuts 32b and 33b are received and held in the non-rotatable state by the nut holding portions 44d and 44g provided in the mounting portions 44a and 44b, respectively, and then the mounting bolt 32a is attached to the frame connecting portion 22, the U-shaped connecting portion 26, and the like. The bolts are inserted into the bolt insertion holes 22b, 26d, and 44c of the mounting portion 44a, and are fastened and fixed by the nut 32b in the nut holding portion 44d. Further, the mounting bolt 33a is inserted into the bolt insertion holes 26f and 44f of the U-shaped connecting portion 26 and the mounting portion 44b, and is fastened and fixed by the nut 33b in the nut holding portion 44g.

  In this case, since the U-shaped connecting portion 26 of the hollow frame 23 that is fastened and fixed by the mounting bolts 31a, 32a, and 33a is processed to be non-hollow, deformation due to fastening and fixing does not occur, and strong fastening is possible. Thus, the fixed posture of the wiper motor 40 is stabilized. Further, since the square columnar frame connecting portion 22 is fitted in the U-shaped connecting portion 26 and is fastened and fixed by the mounting bolts 31a, 32a, 33a, the frame connecting to the U-shaped connecting portion 26 is performed. The rigidity in the direction in which the portion 22, that is, the pivot holder 12 is about to rotate (the axis of the pivot shaft 14 is inclined) is increased, and the fixed posture on the pivot holder 12 side is also stabilized.

  As shown in FIGS. 1 and 2, the wiper motor 40 fixed to the hollow frame 23 has a base end portion of the drive lever 46 fixed to the output shaft 45 protruding from the gear housing 43, together with the output shaft 45. The drive lever 46 is rotated.

  One end of the drive link rod 47 is connected to the tip of the drive lever 46 by a ball joint 48a, and the other end of the drive link rod 47 is connected to the tip of the pivot lever 15 by a ball joint 48b. It is connected. The pivot lever 15 has one end of a connection link rod 49 connected to the tip of the surface opposite to the connection side of the drive link rod 47 by a ball joint 50a, and the other end of the connection link rod 49 is connected to the other side. The tip of the pivot lever 16 is connected to the ball joint 50b.

  That is, the link mechanism in which the rotational movement of the drive lever 46 is converted into the swing movement of the pivot lever 15 by the drive link rod 47 and the other pivot lever 16 is similarly swung by the connecting link rod 49 in the same manner. It is configured. Then, the pivot shafts 13 and 14 are rotated at a predetermined angle by the swinging of the pivot levers 15 and 16 by the link mechanism, so that the wiper arms swing synchronously.

  The wiper device 10 of the present embodiment having such a configuration is modularized by connecting the pivot holders 11 and 12 to each other using the hollow frame 23 as described above, thereby improving the vehicle mountability. And it fixes to the vehicle body side with the attachment bracket 11b, 12b provided in each pivot holder 11,12.

Next, characteristic actions and effects of the present embodiment will be described.
(1) The hollow frame 23 that connects the pivot holders 11 and 12 is provided with a U-shaped connecting portion 26 that is crushed into a non-hollow shape at the other end in the longitudinal direction and formed into a U-shaped cross section. In addition, a mounting flat seat surface 26x for mounting the wiper motor 40 to the U-shaped connecting portion 26 is provided. The pivot holder 12 on the side connected to the U-shaped connecting portion 26 is provided with a frame connecting portion 22 that is fitted into the U-shaped connecting portion 26. The frame connecting portion 22, that is, the pivot holder 12, together with the wiper motor 40 fixed to the mounting flat seat surface 26x with respect to the hollow frame 23 is fastened and fixed by mounting bolts 31a and 32a and nuts 31b and 32b. The wiper motor 40 is also fastened and fixed to the hollow frame 23 by mounting bolts 33a and nuts 33b. Thereby, since the U-shaped connecting portion 26 of the hollow frame 23 is processed to be non-hollow, deformation due to the fastening and fixing of the mounting bolts 31a, 32a, and 33a does not occur, and strong fastening is possible. The fixed posture can be stabilized. Further, since the square columnar frame connecting portion 22 is fitted into the U-shaped connecting portion 26 and is fixed by fastening with the mounting bolts 31a and 32a, the frame connecting portion 22 with respect to the U-shaped connecting portion 26, That is, the rigidity in the direction in which the pivot holder 12 tries to rotate increases, and the fixed posture on the pivot holder 12 side can be stabilized. Accordingly, the pivot frame 12 and the wiper motor 40 can be firmly fixed to the hollow frame 23.

  (2) Since the U-shaped connecting portion 26 of the hollow frame 23 is formed with a mounting flat seat surface 26x on the side opposite to the opening of the bottom wall 26b, and the wiper motor 40 is mounted there in a plane contact, Even if the bottom wall 26b of the U-shaped connecting portion 26 is sandwiched between the wiper motor 40 and the frame connecting portion 22 of the pivot holder 12 and is fixed by the mounting bolts 31a and 32a, The pipe material of the hollow frame 23 can be selected to have a pipe diameter corresponding to the strength.

  (3) The U-shaped connecting portion 26 of the hollow frame 23 and the frame connecting portion 22 of the pivot holder 12 are directed from the outer surface of the pair of opposing side walls 26a to the inner frame connecting portion 22 in the U-shaped connecting portion 26. By the caulking, a caulking portion 35 in which the U-shaped connecting portion 26 bites into the frame connecting portion 22 is formed. As a result, the U-shaped connecting portion 26 of the hollow frame 23 and the frame connecting portion 22 of the pivot holder 12 are more firmly fixed. In addition, if caulking is performed before the mounting bolts 31a and 32a are tightened as in the present embodiment, the U-shaped connecting portion 26 of the hollow frame 23 and the frame connecting portion 22 of the pivot holder 12 can be temporarily fixed, and at least hollow. The intermediate assembly (subassembly) including the frame 23 and the pivot holder 12 can be easily handled.

  In the present embodiment, the mounting flat seat surface 26x for mounting the wiper motor 40 is formed on the bottom wall 26b of the U-shaped connecting portion 26, and the caulking portion 35 is set on the side wall 26a different from the bottom wall 26b. Is formed. Therefore, the mounting flat seat surface 26x is prevented from being deformed by the formation of the caulking portion 35, and the flatness of the mounting flat seat surface 26x is prevented from being lowered, and the mounting state of the wiper motor 40 can be maintained satisfactorily.

  (4) Positioning pins 44e and 44h are provided on the mounting portions 44a and 44b of the wiper motor 40, and pin insertion holes 26e and 26g into which the positioning pins 44e and 44h are inserted into the U-shaped connecting portion 26 of the hollow frame 23. Further, the frame connecting portion 22 is also provided with a pin insertion hole 22c into which the positioning pin 44e is inserted. That is, in the present embodiment, since the wiper motor 40 is positioned with respect to the hollow frame 23 (one also with respect to the frame connecting portion 22), the wiper motor 40 can be more stably fixed to the hollow frame 23. There is an advantage that the mounting bolts 31a, 32a, 33a can be easily tightened.

  (5) Since the mounting portions 44a and 44b provided in the wiper motor 40 are provided with nut holding portions 44d and 44g for receiving and holding the nuts 32b and 33b, the wiper motor 40 is attached to the mounting flat seat surface 26x of the hollow frame 23. When attaching, an operator can save time and labor to hold the nuts 32b and 33b, and the workability of assembling the wiper device 10 can be improved.

  (6) A cylindrical connecting portion 25 is provided on one end in the longitudinal direction of the hollow frame 23, and the pivot holder 11 connected to the cylindrical connecting portion 25 is connected to a columnar frame on which the cylindrical connecting portion 25 is fitted. A portion 21 is provided. Thus, on one end side of the hollow frame 23, the pivot holder 11 is slid along the central axis L of the cylindrical connecting portion 25 before the cylindrical connecting portion 25 and the pivot holder 11 are finally fixed. It can be rotated around the axis L (see FIG. 1), and the distance between the paired pivot holders 11 and 12, the mutual posture, and the like can be adjusted. As described above, since the wiper motor 40 and the pivot holder 12 on the opposite side are firmly fixed to the other end in the longitudinal direction of the hollow frame 23 by the U-shaped connecting portion 26, the wiper device 10 of the present invention is The overall fixing strength is sufficiently higher than the conventional one using a hollow frame having both ends connected to a cylinder.

The embodiment of the present invention may be modified as follows.
In the above embodiment, the U-shaped connecting portion 26 of the hollow frame 23 is “U-shaped” as shown in each figure, but the angle formed between the opposing side wall 26a and the bottom wall 26b is a right angle. Not only a right angle but also an angle formed between them may be a slight acute angle or an obtuse angle. In this case, the quadrangular prism shape of the frame connecting portion 22 of the pivot holder 12 is also changed in accordance with the shape change of the U-shaped connecting portion 26.

  In the above embodiment, the frame connecting portion 22 of the pivot holder 12 to be fitted to the U-shaped connecting portion 26 of the hollow frame 23 has a quadrangular prism shape, but the pivot holder 12 is rotated with respect to the U-shaped connecting portion 26. For example, the shape may be changed to a polygonal shape other than a quadrangular prism shape or a U-shaped cross section as long as it is a shape that can prevent movement.

  In the above embodiment, the bottom wall 26b of the U-shaped connecting portion 26 of the hollow frame 23 is sandwiched between the frame connecting portion 22 of the pivot holder 12 and the mounting portion 44a of the wiper motor 40, and the frame connecting portion 22 and the mounting portion 44a. For example, an attachment flat seat surface for attaching the wiper motor 40 is formed on the outer side surface of the side wall 26a of the U-shaped connecting portion 26, and the side wall 26a is connected with the frame connecting portion 22 of the pivot holder 12. You may clamp and fix.

  In the above embodiment, the caulking is performed from the outer surface of the side wall 26a of the U-shaped connecting portion 26 of the hollow frame 23 toward the frame connecting portion 22 of the pivot holder 12 before the mounting bolts 31a and 32a are tightened. Caulking may be performed after the mounting bolts 31a and 32a are tightened. Further, caulking may be omitted.

  In the embodiment described above, the positioning pins 44e and 44h are provided in the mounting portions 44a and 44b of the wiper motor 40, and the pin insertion holes 26e and 26g into which the positioning pins 44e and 44h are inserted into the U-shaped connecting portion 26 of the hollow frame 23. The wiper motor 40 is positioned with respect to the hollow frame 23. However, the concavo-convex relationship may be reversed. Further, the number of the positioning pins 44e and 44h and the pin insertion holes 26e and 26g may be changed as appropriate. Further, positioning means such as the positioning pins 44e and 44h and the pin insertion holes 26e and 26g may be omitted.

  In the above embodiment, the U-shaped connecting portion 26 is provided only at one end of the hollow frame 23. For example, the middle portion in the longitudinal direction of the hollow frame has a hollow cylindrical shape, and both ends have a U-shaped connecting portion. It is good.

  In the above-described embodiment, the wiper device 10 in which the pair of pivot holders 11 and 12 are connected by the hollow frame 23 is used. However, the wiper device may be configured by using three or more pivot holders. .

It is a perspective view which shows the wiper apparatus in this Embodiment. FIG. 2 is an enlarged perspective view of FIG. 1 illustrating a mounting state of a pivot holder and a wiper motor with respect to a hollow frame. It is a top view which shows the state after attachment of the pivot holder and wiper motor with respect to a hollow frame. It is a top view which shows the state before attachment of the pivot holder and wiper motor with respect to a hollow frame. It is an expansion perspective view of FIG. 1 which shows a caulking part. It is sectional drawing which shows a caulking part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11, 12 ... Pivot holder, 13, 14 ... Pivot shaft, 21, 22 ... Frame connection part, 23 ... Hollow frame, 25 ... Cylindrical connection part, 26 ... U-shaped connection part, 26a ... Side wall, 26b ... Bottom wall, 26e, 26g ... pin insertion holes constituting positioning means, 26x ... mounting flat seat surfaces, 31a to 33a ... mounting bolts constituting fastening members, 31b to 33b ... nuts constituting fastening members, 35 ... caulking portions, DESCRIPTION OF SYMBOLS 40 ... Wiper motor, 44a, 44b ... Attachment part, 44d, 44g ... Nut holding part, 44e, 44h ... Positioning pin which comprises positioning means, 46 ... Drive lever which comprises the link mechanism as a mechanism, 47 ... Link as a mechanism Drive link rod constituting the mechanism, 49... Link link rod constituting the link mechanism as the mechanism.

Claims (6)

At least a pair of pivot holders that rotatably support a pivot shaft for supporting the wiper arm are connected to each other by a hollow frame formed of a pipe material, and a wiper motor is fixed to the hollow frame, and rotational movement of the wiper motor is performed. A module type wiper device comprising a mechanism for converting the pivot shaft into a pivoting motion of a predetermined angle to swing the wiper arm;
The hollow frame has a U-shaped connecting portion that is crushed into a hollow shape at one end in the longitudinal direction and is formed in a U-shaped cross-section, and the wiper motor is attached to the U-shaped connecting portion. It has a mounting flat seat surface,
The pivot holder connected to the U-shaped connecting part is fitted into the U-shaped connecting part, and is fastened and fixed by a tightening member together with the wiper motor fixed to the mounting flat seat surface. A wiper device comprising a portion. The wiper device according to claim 1,
The U-shaped connecting portion of the hollow frame has the mounting flat seat surface formed on the side opposite to the opening of the bottom wall, and the bottom wall is sandwiched between the wiper motor and the frame connecting portion of the pivot holder. Wiper device. The wiper device according to claim 1 or 2,
The U-shaped connecting portion of the hollow frame and the frame connecting portion of the pivot holder are formed by caulking from the outer surfaces of a pair of opposing side walls to the inner frame connecting portion in the U-shaped connecting portion. A wiper device, characterized in that a caulking portion is formed in which a U-shaped connecting portion bites into the frame connecting portion. The wiper device according to any one of claims 1 to 3,
At least the wiper motor and the hollow frame are provided with positioning means for positioning the wiper motor with respect to the hollow frame. In the wiper device according to any one of claims 1 to 4,
The tightening member is a mounting bolt and a nut,
The wiper motor according to claim 1, wherein the wiper motor has a mounting portion for mounting on the mounting flat seat surface of the hollow frame, and the mounting portion has a nut holding portion for receiving and holding the nut. In the wiper device according to any one of claims 1 to 5,
The hollow frame has a cylindrical coupling portion formed in a hollow cylindrical shape on the other end side in the longitudinal direction,
The wiper device, wherein the pivot holder connected to the cylindrical connecting portion has a columnar or annular frame connecting portion in which the cylindrical connecting portion is fitted or fitted.

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