JP2003019948A - Wiper, and method for connecting pivot holder of wiper to hollow frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper capable of preventing the strength from degrading or residual stresses from remaining in a member after connection, ensuring the connecting and fixing accuracy over a long time, improving the assembly workability with simple positioning, and easily adaptable to fine changes by the vehicle kind, and a method for connecting a pivot holder of the wiper to a hollow frame. SOLUTION: In the wiper 10, fitting parts 36 and 38 of the pivot holders 12 and 14 and connection parts 44 and 46 of a pipe frame 42 are formed of a same resin material. Surfaces of both members are melted by applying the high frequency vibration thereto with both members in a fitted condition to each other, and the melted part is hardened to connect and fix both members to each other. In addition, the pipe frame 42 has an annular section, and the fitting parts 36 and 38 are formed spherical, and thus, the longitudinal direction of the pipe frame 42 to the pivot holders 1 2 and 14 can be set optionally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device for wiping a windshield glass of an automobile and a method for connecting a pivot holder and a hollow frame of the wiper device.

[0002]

2. Description of the Related Art A wiper device for wiping a windshield glass of an automobile wipes raindrops and the like on the windshield glass surface by rotating a wiper arm attached to a pivot shaft within a predetermined range by the rotation of the pivot shaft. To do.

Among such wiper devices, there is known a so-called pipe type module wiper device in which a pivot holder for supporting a pivot shaft is connected by a pipe frame (for example, Japanese Patent Laid-Open No. 8-156747). , In the following referred to as materials).

Here, the above-mentioned document discloses that in such a pipe type module wiper device, a metal pipe frame and an aluminum alloy pivot holder are connected and fixed by "caulking". In the "caulking" shown in this document, a recess is formed in the fitting part of the pivot holder, and after this fitting part is inserted into the metal pipe frame, the outer peripheral surface of this pipe frame follows the recess. By pressurizing from above and below with a press die (caulking with the die), the meat of the pipe frame is bitten into the recess, and the pipe frame and the pivot holder are connected and fixed. .

However, in the structure disclosed in the above document in which the pipe frame and the pivot holder are connected and fixed by "caulking", the recess formed in the pivot holder due to the "caulking" is predetermined in the longitudinal direction of the pipe frame. Since there are a pair of them facing each other in parallel in the outer surface state with a space, it is necessary to match the mold splitting direction of the molding die of the pivot holder with the parallel direction of this recess, and the dimensional accuracy is improved. As well as being required, the degree of freedom in design will be limited.

That is, in the caulking process as described above, the recess formed in the pivot holder and the caulking claw of the die must be preliminarily aligned from the outside of the pipe frame and pressed against each other, but the pivot is carried out on the pipe frame. When the fitting portion of the holder was inserted, it was difficult to confirm the position of the recess formed in the fitting portion. If this position shifts, the service life of the crimping claw of the mold may be reached early, or the fitting portion of the pivot holder may be damaged. In particular, damage to the fitting portion of the pivot holder is hidden in the pipe frame and is difficult to find.

On the other hand, from the viewpoint of weight reduction and moldability, there is a pivot holder made of a resin. However, when the resin holder and the metal pipe frame are fixed by crimping, apart from the above problem, the linear expansion coefficients of the two differ from each other due to the difference in the materials (generally, the metal material is smaller than the resin material). ), Backlash may occur between both members at low temperature.

Further, the pivot holder is a resin holder and the pipe frame is a hollow resin frame.
The one in which the shaft-shaped fitting part of the resin holder is inserted into the hollow resin frame and connected and fixed to each other is currently being developed. However, when the fitting part of the resin holder is inserted into the hollow resin frame, the longitudinal direction of the hollow resin frame with respect to the resin holder or the axial direction of the pivot shaft with respect to the hollow resin frame is uniquely determined. (The axial direction of the fitting portion and the longitudinal direction of the hollow resin frame are always parallel to each other). For this reason, the relative positional relationship (angular relationship) between the hollow resin frame and the resin holder cannot be set arbitrarily, and for minute changes for each vehicle model, such as changes in the inclination angle of the windshield glass, There is a problem that another resin holder and a hollow resin frame must be prepared.

[0009]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention can prevent the strength from lowering and the residual stress on the members after the connection, and can secure the connection fixing accuracy for a long time. In addition, the present invention provides a wiper device that can improve assembly workability by simple positioning and can easily cope with small changes for each vehicle type, and a method for connecting a pivot holder of the wiper device and a hollow frame. That is the purpose.

[0010]

A wiper device according to a first aspect of the present invention includes a wiper motor, a plurality of pivot holders for rotatably supporting a pivot shaft having a wiper arm fixed to a tip thereof, and the pivot holders. A hollow frame to be connected, wherein in the wiper device in which the pivot shaft is rotationally driven by the driving force of the wiper motor, the hollow frame is a hollow resin frame having an annular cross section made of a resin material, and both ends thereof are The pivot holder has a connecting portion that is connected to the pivot holder, and the pivot holder has a fitting portion that fits with the connecting portion of the hollow frame, and at least the fitting portion is formed of a resin material in a spherical shape. Has a spherical portion, and connects the connecting portion of the hollow frame and the fitting portion of the pivot holder by welding or bonding. Wearing was, it is characterized in that.

In the wiper device according to the present invention, the pivot holder that rotatably supports the pivot shaft has a fitting portion, and at least this fitting portion is a spherical portion formed of a resin material. have. The hollow frame is a hollow resin frame made of a resin material,
It has a connection part. The fitting portion of the pivot holder and the connecting portion of the hollow frame are connected and fixed by welding or adhesion.

Therefore, in this wiper device, unlike the conventional wiper device, it is not necessary to form a recess in the fitting portion of the pivot holder, so that this recess becomes a weak point and the strength decreases. Absent.

Further, the members are not plastically deformed to be connected as in the case of "crimping", but a part of the members are melted, and the melted part is hardened so that the members (pivots) Since the fitting portion of the holder and the connection portion of the hollow frame are welded and connected and fixed, or both members are joined via an adhesive, strength stress is unlikely to remain on each member after connection.

Further, since it is not "crimping", it is not necessary to perform difficult positioning such as "preliminarily aligning the recess and the crimping claw of the mold from the outside of the pipe frame" unlike the conventional wiper device. Assembling work can be easily performed by simple alignment that can be confirmed from the outside such as the fitting state of the fitting portion of the pivot holder and the connecting portion of the hollow frame. In this case, since the fixed area, that is, the joining force between both members is determined in the fitted state, it is possible to arbitrarily adjust and change this, and the degree of freedom in design and the range of application are expanded.

Moreover, since the hollow frame has an annular cross section and the spherical portion of the pivot holder fitting portion is formed in a spherical shape, the hollow frame is oriented in the longitudinal direction with respect to the pivot holder, or the pivot shaft with respect to the hollow frame. The axial direction can be set arbitrarily. For this reason, the relative positional relationship (angular relationship) between the hollow frame and the pivot holder can be arbitrarily set, and it is possible to easily cope with minute changes for each vehicle model such as changes in the inclination angle of the windshield glass. It is possible.

As described above, in the wiper device according to the first aspect, it is possible to prevent the strength from being lowered or the stress to remain on the members after the connection, and it is possible to secure the connecting and fixing accuracy for a long period of time. Moreover, the assembly workability can be improved by simple alignment, and it is possible to easily deal with small changes for each vehicle type.

A wiper device according to a second aspect of the present invention is the wiper device of the first aspect.
In the wiper device according to claim 1, the fitting portion has an outer diameter dimension of the spherical portion set to be larger than an inner diameter of the connection portion of the hollow frame, and the hollow portion is formed on a surface of the spherical portion of the fitting portion. It is characterized in that the connection portion of the frame is welded or adhered and connected and fixed.

In the wiper device according to the second aspect, since the outer diameter of the spherical portion is set larger than the inner diameter of the connecting portion of the hollow frame and the connecting portion is welded or adhered to the surface of the spherical portion, the spherical shape is obtained. Compared to the case where the outer diameter of the hollow part is set to be equal to or smaller than the inner diameter of the connecting part of the hollow frame, the settable range of the longitudinal direction of the hollow frame with respect to the pivot holder, or the axis line of the pivot shaft with respect to the hollow frame The range in which the direction can be set can be increased.

A wiper device according to a third aspect of the present invention is the wiper device of the first aspect.
Alternatively, in the wiper device according to a second aspect of the invention, the connecting portion of the hollow frame is welded or adhered over the entire circumference of the fitting portion of the pivot holder.

In the wiper device according to the third aspect of the present invention, the connecting portion and the fitting portion of both members are welded or adhered over the entire circumference, so that the raindrops transmitted from the pivot holder have a gap between the fitting portions. It is possible to prevent the water from accumulating in the hollow frame without entering from the inside. Especially in this case, since the hollow frame is made of resin, so-called "rust" does not occur,
It is possible to prevent the infiltrated water from spoiling and giving off a bad odor, and the infiltrated water is so-called “chapochapo” due to vibration.
It is also possible to prevent abnormal noise.

According to a fourth aspect of the present invention, there is provided a method of connecting a pivot holder and a hollow frame of a wiper device, including a wiper motor,
A plurality of pivot holders that rotatably support a pivot shaft to which a wiper arm is fixed at the tip, and a hollow frame that connects the pivot holders to each other,
In a method of connecting the pivot holder and the hollow frame in a wiper device in which the pivot shaft is rotationally driven by a driving force of the wiper motor, in the method of connecting the hollow frame to the pivot holder, a resin having connecting portions at both ends thereof is used. It is formed of a hollow resin frame having an annular cross-section made of a material, and the pivot holder is provided with a fitting portion for fitting with the connection portion of the hollow frame, and at least the fitting portion is formed of a resin material in a spherical shape. High frequency vibration is applied to at least one of the connection portion of the hollow frame and the fitting portion of the pivot holder to melt the surfaces of both members, and then the melted portion is cured to connect both members by welding. The feature is that it is fixed.

In the connecting method of the pivot holder and the hollow frame of the wiper device according to the fourth aspect, the fitting portion is formed in the pivot holder, and at least this fitting portion is made of a resin material. Further, the hollow frame is formed of a hollow resin frame made of a resin material and having a connecting portion. High-frequency vibration is applied to the fitting portion of the pivot holder and the connection portion of the hollow frame to melt the surfaces of both members, and then the melted portion is hardened and both members are connected and fixed by welding.

Therefore, in the method of connecting the pivot holder and the hollow frame of the wiper device, it is not necessary to form a recess in the fitting portion of the pivot holder as in the connecting method by "caulking" in the conventional wiper device. , The recess does not become a weak point and the strength does not decrease.

Further, the members are not plastically deformed to be connected to each other as in the case of "caulking", but a part of the members are melted and the melted part is hardened so that the members (pivots) Since the fitting portion of the holder and the connecting portion of the hollow frame are welded and connected and fixed, it is difficult for residual stress to remain in each member after connection.

Further, since the members are subjected to high-frequency vibration to melt the surfaces of both members, it is possible to prevent the parts other than desired parts from being melted or deformed.

Further, since it is not "caulking", it is difficult to "preliminarily align the recess and the caulking claw of the die from the outside of the pipe" like the connecting method by "caulking" in the conventional wiper device. There is no need for alignment, and the assembly work can be performed easily by simple alignment that can be confirmed from the outside such as the fitting state of the fitting portion of the pivot holder and the connection portion of the hollow frame. In this case, since the welding area, that is, the joining force between both members is determined in the fitted state, it is possible to arbitrarily adjust and change this, and the degree of freedom in design and the range of application are expanded.

Moreover, since the hollow frame is formed of a hollow resin frame having an annular cross section and the fitting portion of the pivot holder is formed in a spherical shape, the hollow frame is oriented in the longitudinal direction with respect to the pivot holder, or with respect to the hollow frame. The direction of the pivot shaft in the axial direction can be arbitrarily set. For this reason, the relative positional relationship (angular relationship) between the hollow frame and the pivot holder can be arbitrarily set, and it is possible to easily cope with minute changes for each vehicle model such as changes in the inclination angle of the windshield glass. It is possible.

As described above, in the method of connecting the pivot holder and the hollow frame of the wiper device according to the fourth aspect, it is possible to prevent the strength from being lowered and the stress to remain in the members after the connection, and to further extend the long-term. The connecting and fixing accuracy can be ensured, the assembling workability can be improved by a simple position adjustment, and small changes for each vehicle type can be easily dealt with.

According to a fifth aspect of the present invention, there is provided a method of connecting a pivot holder of a wiper device and a hollow frame, wherein the pivot holder of the wiper device is connected to the hollow frame. A diameter dimension is set to be larger than the inner diameter of the connecting portion of the hollow frame, and the connecting portion of the hollow frame is connected and fixed to the surface of the fitting portion by welding over the entire circumference of the fitting portion, It is characterized by that.

In the method for connecting the pivot holder and the hollow frame of the wiper device according to the fifth aspect, the outer diameter dimension of the fitting portion is set to be larger than the inner diameter of the connecting portion of the hollow frame so that the connecting portion is formed on the surface of the fitting portion. Compared to the case where the outer diameter of the fitting part is set to be equal to or smaller than the inner diameter of the connecting part of the hollow frame because it is welded, the range in which the hollow frame can be set in the longitudinal direction relative to the pivot holder, or It is possible to further increase the settable range of the axial direction of the pivot shaft with respect to the hollow frame.

Further, since the connecting portion and the fitting portion of both members are welded over the entire circumference, the raindrops transmitted from the pivot holder do not enter through the gap of the fitting portion, and the hollow frame It is possible to prevent the accumulation. In this case, since the hollow frame is made of resin, so-called "rust" does not occur, but it is possible to prevent the infiltrated water from spoiling and giving off a bad odor, and the infiltrated water differs from the so-called "chapochapo" due to vibration. It is also possible to prevent emitting sound.

[0032]

1 is a plan view showing the overall configuration of a wiper device 10 according to an embodiment of the present invention, and FIG. 2 is a front view showing the overall configuration of the wiper device 10. It is shown.

The wiper device 10 includes a pair of pivot holders 12 and a pair of pivot holders 14. The pivot holder 12 and the pivot holder 14 are formed substantially symmetrically and have the same basic configuration. Both the pivot holder 12 and the pivot holder 14 are made of a resin material (for example, polyethylene terephthalate, polyamide, polyacetal, or the like). Further, the pivot holder 12 is provided with a cylindrical portion 16, and the pivot holder 14 is provided. A tubular portion 18 is provided. The cylindrical portions 16 and 18 are formed in a cylindrical shape, and the pivot shaft 20 and the pivot shaft 22 are inserted into the shaft holes 17 and 19 of the pivot holders 12 and 14, respectively, and rotatably support them. .

Pivot levers 24 and 26 are fixed to the lower ends of the pivot shafts 20 and 22, respectively, and the pivot shafts 20 and 22 are rotated by swinging of the pivot levers 24 and 26. Further, at the corners of the members of the pivot holders 12 and 14, the mounting holes 28,
30 is formed in a state of being connected to the tubular portions 16 and 18, respectively. The wiper device 10 is fixed to the vehicle body by the mounting bolts inserted through the mounting holes 28 and 30.

Further, as shown in FIG. 3, the pivot holders 12 and 14 are provided with connecting shafts 32 and 34 on the opposite sides of the mounting holes 28 and 30 in a state of being connected to the cylindrical portions 16 and 18, respectively. ing. The connecting shafts 32 and 34 are
Like the main body of the pivot holders 12 and 14, it is a solid shaft (peeled shaft) made of a resin material, and its base end side is cylindrical and its tip end side is fitted to a pipe frame 42 described later. Fitting part 36 and fitting part 3 for interlocking connection
It is supposed to be 8. The fitting portions 36 and 38 are the connecting shaft 3
The entire portion excluding the connecting portion with the base end sides of 2, 34 is a spherical portion formed in a spherical shape. The fitting portion 36 of the pivot holder 12 and the fitting portion 3 of the pivot holder 14
8 and 8 are connected to each other by a pipe frame 42 as a hollow frame.

The pipe frame 42 is a hollow resin frame made of the same resin material as that of the pivot holders 12 and 14 (fitting portions 36 and 38) described above, and both longitudinal ends of the connecting shafts 32 and 34. Fitting parts 36, 38
Corresponding to the connection portion 44 and the connection portion 46. These connecting portions 44 and 46 are formed in an annular cross-section that fits the outer circumferences of the fitting portions 36 and 38 of the pivot holders 12 and 14, and the connecting portion 44 is the fitting portion 36 of the connecting shaft 32.
And the connecting portion 46 is connected to the fitting portion 38 of the connecting shaft 34.
To the connecting portion 44 and the fitting portion 36 in this state.
The surface and the surfaces of the connecting portion 46 and the fitting portion 38 are connected and fixed to each other by welding.

In this case, at the time of welding, the connecting portion 4
4 and the fitting portion 36, and the connecting portion 46 and the fitting portion 38 are subjected to high-frequency vibration (for example, the frequency is 30 kHz or less, preferably 20 kHz) to generate frictional heat on the surfaces of both members and melt them. After that, both members are connected and fixed by curing the melted portion.

Further, as described above, high frequency vibration is applied to melt the surfaces of the connecting portions 44 and 46 of the pipe frame 42 and the fitting portions 36 and 38 of the pivot holders 12 and 14 (connecting shafts 32 and 34). Pivot holder 12, 14
In connecting and fixing the pipe frame 42 and the pipe frame 42, as shown in FIG. 4, the outer dimensions of the fitting portions 36 and 38 (spherical portions) are set larger than the inner diameters of the connection portions 44 and 46, and the connection portions are 44 and the connecting portion 46 are the fitting portions 3 respectively.
6. The entire circumference of the fitting portion 38 is welded.

On the other hand, in the middle portion of the pipe frame 42,
Wiper motor 5 as a drive source via bracket 56
8 is attached. The wiper motor 58 has a structure in which a motor portion 58A and a gear portion 58B are integrally provided, and a housing 60 of the gear portion 58B is fixed to the bracket 56.

The output shaft 70 of the wiper motor 58 projects toward the back side of the housing 60 (the back side of the paper in FIG. 1, the lower side of the paper in FIG. 2), and the crank arm 72 is attached to the tip thereof. . A link rod 76 and a link rod 78 are connected to the tip of the crank arm 72 via a ball joint 74. One of the link rods 76 serves as the pivot lever 24 of the pivot shaft 20 supported by the pivot holder 12.
Is connected to the pivot lever 26 of the pivot shaft 22 supported by the pivot holder 14 by means of a ball joint 80.
To a ball joint 82. As a result, the wiper motor 58 operates and the crank arm 72
By rotating, the driving force is transmitted through the link rods 76 and 78 and the pivot levers 24 and 26,
The pivot shafts 20 and 22 are each rotated.

As described above, the wiper device 10 includes the pair of pivot holders 1 that support the pivot shafts 20 and 22.
The so-called pipe-type module type (so-called frame-integrated type) is formed by connecting the two and 14 with a pipe frame 42.

Wiper arms and blades (not shown) are attached to the tips of the pivot shafts 20 and 22, respectively, so that the rotation of the pivot shafts 20 and 22 causes the wiper arms and blades to reciprocate within a predetermined range. There is.

Next, the operation of this embodiment will be described.

In the wiper device 10 having the above structure, the pivot holders 12 and 14 that rotatably support the pivot shafts 20 and 22 are connected and fixed to each other by the pipe frame 42, and the wiper motor 58 is provided in the middle portion of the pipe frame 42. It is fixed and assembled as a whole. In this state, the pivot holders 12, 14
It is fixed to the vehicle body structural member below the windshield glass (usually the cowl portion) by the mounting bolts inserted through the mounting holes 28 and 30 of FIG.

Furthermore, the pivot shafts 20 and 22 are rotated by the operation of the wiper motor 58, and the wiper arms and blades are reciprocally rotated within a predetermined range to wipe off raindrops and the like on the windshield glass.

In the wiper device 10, the pivot holders 12 and 14 have fitting portions 36 and 38 of the connecting shafts 32 and 34 which are fitted and connected to the pipe frame 42, and the fitting portion 36 is also provided. , 38 are made of a resin material. The pipe frame 42 is a hollow resin frame made of a resin material whose main material is polyacetal as the same resin material as the pivot holders 12 and 14 (fitting portions 36 and 38), and has connecting portions 44 and 46. ing. Further, a pipe frame 42 is attached to the fitting portions 36 and 38.
The connection parts 44 and 46 of are fitted, but at this time, about 20 kH
Since high-frequency vibration of z is applied, frictional heat is generated at the contact surfaces of both members, the surfaces are melted, and the melted resin is cured, so that they are connected and fixed by so-called welding.

Therefore, in the wiper device 10, unlike the conventional wiper device, the fitting portions 36 and 38 (the connecting shafts 32 and 34) of the pivot holders 12 and 14 do not need to be formed with a recess for connecting. , The recess does not become a weak point and the strength does not decrease.

Further, the members are not plastically deformed to be connected as in the case of "caulking", but a part of the members are melted and the melted part is hardened to bring the members into contact with each other. Surface (fitting portion 36 of pivot holder 12, 14;
Since the connecting portions 44 and 46 of the pipe 38 and the pipe frame 42 are welded and fixedly connected, a strength stress is unlikely to remain in each member after the connection.

Further, since it is not "caulking", it is not necessary to perform difficult positioning such as "preliminarily aligning the recess and the caulking claw of the die from the outside of the pipe frame" unlike the conventional wiper device. , Pivot holder 12,
The assembling work can be easily carried out by a simple alignment in which the fitting state of the fitting portions 36, 38 of 14 and the connecting portions 44, 46 of the pipe frame 42 can be confirmed from the outside. In this case, since the welding area, that is, the joining force between both members is determined in the fitted state, it is possible to arbitrarily adjust and change this, and the degree of freedom in design and the range of application are expanded. In this case, of course, a part of the fitting portion may be (partially) welded.

Further, by forming the pipe frame 42 and the fitting portions 36 and 38 of the pivot holders 12 and 14 from the same resin material, the melting time and curing time of both members at the time of welding become the same, The work process is extremely easy to manage and the welded parts of both members are familiar to each other, so that a joined state with less unevenness can be obtained.

Moreover, the connecting portions 44 and 46 of the pipe frame 42 and the fitting portions 36 of the pivot holders 12 and 14 are
Since high frequency vibration is applied to 38 to melt and weld the surfaces of both members by the generation of frictional heat, it is possible to prevent melting or deformation of parts other than the desired part. Further, the surface can be melted relatively uniformly.

Further, since the pipe frame 42 has an annular cross section and the fitting portions 36, 38 (spherical portions) of the pivot holders 12, 14 are formed in a spherical shape, the pipe frames for the pivot holders 12, 14 are formed. The longitudinal direction of 42 or the axial direction of the pivot shafts 20 and 22 with respect to the pipe frame 42 can be arbitrarily set. Therefore, the pipe frame 4
The relative positional relationship (angular relationship) between the 2 and the pivot holders 12 and 14 can be arbitrarily set, and it is possible to easily cope with minute changes for each vehicle model such as changes in the inclination angle of the windshield glass. Is.

Further, as shown in FIG. 4, the outer diameters of the fitting portions 36, 38 of the pivot holders 12, 14 are set to be larger than the inner diameters of the connecting portions 44, 46 of the pipe frame 42. Since the connecting portions 44 and 46 are welded, as compared with the case where the outer diameters of the fitting portions 36 and 38 are set to be equal to or smaller than the inner diameters of the connecting portions 44 and 46 of the pipe frame 42 as shown in FIG. However, the settable range of the longitudinal direction of the pipe frame 42 with respect to the pivot holders 12 and 14 is smaller than the angle limited by the proximal end portions of the connecting shafts 32 and 34, and thus the pipes with respect to the pivot holders 12 and 14 are reduced. The settable range of the longitudinal direction of the frame 42 or the setting of the axial direction of the pivot shafts 20, 22 with respect to the pipe frame 42. Range can be further increased.

Furthermore, in this wiper device 10, since the fitting portions 36, 38 of the pivot holders 12, 14 and the connecting portions 44, 46 of the pipe frame 42 are welded over the entire circumference, the pivot holders are not welded. It is possible to prevent raindrops transmitted from 12 and 14 from entering through the gap of the fitting portion and accumulating in the pipe frame 42. In particular, since the pipe frame 42 is made of resin, so-called "rust" does not occur, but it is possible to prevent the invading water from spoiling and giving off a bad odor (generally, the wiper device is often arranged in the cowl portion, The air inlet of the air conditioner is located in the vicinity, but it does not give an occupant an uncomfortable feeling) and it is also possible to prevent the invading accumulated water from emitting a so-called "chapochapo" noise due to vibration.

As described above, in the wiper device 10 according to the present embodiment, the pivot holders 12 and 14 and the pipe frame 42 are connected and fixed to each other by welding, and the strength is lowered or the member after connection ( Pivot holder 1
Stress is unlikely to remain in the fitting portions 36, 38 of 2, 14 and the connecting portions 44, 46) of the pipe frame 42, and the connection and fixing accuracy can be secured for a long period of time, and difficult alignment is unnecessary. It can be easily carried out with a simple alignment that can be confirmed from the outside, assembly workability can also be improved, and the longitudinal direction of the pipe frame 42 with respect to the pivot holders 12 and 14 can be set arbitrarily, so that It is possible to easily deal with small changes in.

In addition, in the above-described embodiment, the entire portion except the connecting portions of the fitting portions 36 and 38 with the connecting shafts 32 and 34 proximal ends is formed into a spherical portion having a spherical shape. However, not limited to this, the fitting portions 36, 38
Alternatively, a part of the portion other than the connecting portion with the base end sides of the connecting shafts 32 and 34 may be formed into a spherical portion having a spherical shape.

Further, in the above-described embodiment, not only the fitting portions 36, 38 of the pivot holders 12, 14 but also the main body portions of the pivot holders 12, 14 are all made of a resin material. Not limited to this, at least the spherical portions of the fitting portions 36 and 38 are made of a resin material (in other words, the other portions such as the tubular portions 16 and 18 are made of a metal material, for example). There is no problem.

Furthermore, in the above-described embodiment, the outer diameter of the fitting portions 36, 38 of the pivot holders 12, 14 is set larger than the inner diameters of the connecting portions 44, 46 of the pipe frame 42. As in the wiper device 90 shown in FIG. 5, the outer diameter dimensions of the fitting portions 36, 38 of the pivot holders 12, 14 may be set equal to the inner diameters of the connecting portions 44, 46 of the pipe frame 42.

Furthermore, in the above-described embodiment, the high frequency used for welding is 20 kHz, but it is preferable that the frequency is 30 kHz or less, and if it is 30 kHz or more, wear occurs between members.

Although polyethylene terephthalate, polyamide, and polyacetal are exemplified as the resin material in the above-described embodiments, these resin materials are used as the main materials, and the wiper such as bending strength, elongation, hardness, and color is used. Glass, carbon or the like may be mixed depending on the characteristics, color and texture required for the hollow frame (pipe frame 42) of the device.

Further, in the above-described embodiment, the fitting portions 36, 38 of the pivot holders 12, 14 are preferable examples.
Although the connecting portions 44 and 46 of the pipe frame 42 are connected by welding, they may be connected by an adhesive.

[Brief description of drawings]

FIG. 1 is a plan view showing an overall configuration of a wiper device according to an embodiment of the present invention.

FIG. 2 is a front view showing the overall configuration of the wiper device according to the embodiment of the present invention.

FIG. 3 is a perspective view showing details of the fitting portion of the pivot holder and the connecting portion of the pipe frame of the wiper device according to the embodiment of the present invention.

FIG. 4 is a plan view showing in detail the fitting state of the fitting portion of the pivot holder and the connecting portion of the pipe frame of the wiper device according to the exemplary embodiment of the present invention.

FIG. 5 is a plan view showing in detail a modified example of the fitting state of the fitting portion of the pivot holder and the connecting portion of the pipe frame of the wiper device according to the exemplary embodiment of the present invention.

[Explanation of symbols]

10 Wiper device 12 pivot holder 14 Pivot holder 20 pivot shaft 22 Pivot shaft 32 connecting shaft 34 Connection shaft 36 Fitting part (spherical part) 38 Fitting part (spherical part) 42 Pipe frame (hollow frame) 44 connection 46 Connection 58 Wiper motor 90 Wiper device

Claims (5)

[Claims] 1. A drive force for the wiper motor, comprising: a wiper motor; a plurality of pivot holders for rotatably supporting a pivot shaft to which a wiper arm is fixed; and a hollow frame for connecting the pivot holders to each other. In the wiper device in which the pivot shaft is rotatably driven by the hollow frame, the hollow frame is a hollow resin frame having an annular cross section made of a resin material, and both ends thereof have connection portions connected to the pivot holder. The holder has a fitting portion that fits with the connecting portion of the hollow frame, and at least the fitting portion has a spherical portion formed in a spherical shape with a resin material. The wiper device is characterized in that the portion and the fitting portion of the pivot holder are connected and fixed by welding or adhesion. 2. The fitting portion has an outer diameter dimension of the spherical portion set to be larger than an inner diameter of the connection portion of the hollow frame, and the hollow frame is provided on the surface of the spherical portion of the fitting portion. The wiper device according to claim 1, wherein the connection portion is welded or adhered and connected and fixed. 3. The wiper device according to claim 1, wherein the connection portion of the hollow frame is welded or adhered over the entire circumference of the fitting portion of the pivot holder. 4. A drive force for the wiper motor, comprising: a wiper motor; a plurality of pivot holders for rotatably supporting a pivot shaft to which a wiper arm is fixed; and a hollow frame for connecting the pivot holders to each other. A method for connecting the pivot holder and the hollow frame in a wiper device in which the pivot shaft is driven to rotate by a method, wherein a cross-section circle made of a resin material having a connecting portion for connecting the hollow frame to the pivot holder at both ends. It is formed by an annular hollow resin frame, and the pivot holder is provided with a fitting portion that fits with the connecting portion of the hollow frame, and at least the fitting portion is formed in a spherical shape by a resin material, Apply high frequency vibration to at least one of the connecting part and the fitting part of the pivot holder. A method for connecting a pivot holder and a hollow frame of a wiper device, characterized in that the surfaces of both members are melted by applying them, and then the melted portion is cured to connect and fix both members by welding. 5. The fitting portion has an outer diameter dimension set to be larger than an inner diameter of the connecting portion of the hollow frame, and the connecting portion of the hollow frame is provided on the surface of the fitting portion with the fitting portion of the fitting portion. The method for connecting the pivot holder and the hollow frame of the wiper device according to claim 4, wherein the pivot holder is connected and fixed by welding over the entire circumference.