JPH0518221Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a wiper arm mounting structure.

<Prior Art> As a conventional wiper arm mounting structure, there is one shown in FIGS. 4 and 5, for example (see Japanese Utility Model Application No. 56-1866).

That is, the fitting hole 5 formed in the arm head 4 of the wiper arm 3 is fitted into the taper serration portion 2 of the pivot shaft 1 connected to the wiper interlocking mechanism (not shown) of the vehicle, and then fixed. The wiper arm 3 is fastened and fixed to the pivot shaft 1 by screwing a nut 6 into the threaded portion 7 at the tip of the pivot shaft 1. Note that 8 is a spring and 9 is an arm piece.

<Problems to be Solved by the Invention> However, with such a conventional wiper arm mounting structure, it is difficult to change from a fully concealed type wiper arm to another type (for example, a semi-contained type) wiper arm, and there is room for improvement.
That is, in the fully concealed type vehicle 10,
When the wiper 11 stops operating, the arm head 4, retainer 12, wiper blade 13, etc. are retracted and positioned below the hood 14, so the retainer 12 is moved away from the front window glass 15 and lifted in the direction of arrow A [lockback]. However, the hood 14 gets in the way and cannot be locked back. For example, when it snows, the wiper arm 3 is locked back to move the wiper blade 13 away from the windshield 15 to prevent freezing, or the hood 14 in which the wiper arm 3 is stored Even if you try to remove the snow from the lower part of the
It was difficult to prevent freezing and remove snow because it could not be locked back.

Therefore, depending on the season, the wiper arm is replaced with a wiper arm that can be locked back, such as a semi-contained wiper arm 16.
Since the tapered serration portion 2 is formed below the threaded portion 7 and has a serrated surface,
When replacing the wiper arms 3 and 16, it is necessary to position and fit the wiper arms 3 and 16 to the taper serration part 2 almost by sight, and the wiper arms 3 and 16 must be fitted to the taper serration part 2. Since they are directly fitted, a considerable amount of force is required to remove the wiper arms 3 and 16.
In order to maintain the proper wiping range of the wiper 11 during installation, it is necessary to adjust the set position each time, and if the tightening torque of the nut 6 is not controlled each time the wiper arms 3 and 16 are installed, the connection between the wiper arms 3 and 16 and the pivot shaft 1 will be difficult. It was difficult to replace wiper arms of fully concealed type and semi-contained type because the strength varied.

Therefore, this idea was created with the above points in mind.The wiper arm can be easily replaced, and it does not require much force to remove the wiper arm. The purpose is to provide a wiper arm mounting structure that does not require management of tightening torque.

<Means for solving the problem> In order to achieve the above object, this wiper arm mounting structure has a reverse taper serration portion that corresponds to the taper serration portion of the pivot shaft connected to the wiper interlocking mechanism of the vehicle. and an insertion hole continuous to the reverse taper serration portion, the arm head fixing body has a threaded portion of the pivot shaft inserted into the insertion hole, and the taper serration portion is fitted into the reverse taper serration portion. Then, by screwing the nut into the threaded part protruding from the insertion hole,
attached to the pivot shaft, and a fitting male part is formed on one of the arm head fixing body and the arm head to restrict the arm head to a unique mounting angle, and a fitting female part is formed on the other, The arm head is attached to the arm head fixing body by an independent attachment means different from the threaded portion and the nut, with the male and female fitting portions mated together. It is something.

<Function> This invention uses the above-mentioned means to first attach the arm head fixing body to the taper serration part of the pivot shaft with the reverse taper serration part corresponding thereto, and then attach the arm head to the arm head fixing body at a unique mounting angle. The wiper arm is attached by fitting the male and female together and fixing them.

The arm head fixing body has a reverse taper serration part that corresponds to the taper serration part of the pivot shaft, and it remains attached to the pivot shaft by serration connection, so that when replacing the wiper arm, the arm head of the wiper arm and the arm head can be connected to each other. Because all you have to do is uncouple the male fitting part and the female part from the fixed body and reconnect them after replacement, positioning and fitting are extremely easy compared to the conventional method of replacing and attaching the wiper arm directly to the pivot shaft. becomes.

Arm head fixing body and arm head mating male
Since the female part is defined by only one mounting angle,
It is sufficient to simply align and engage the arm head with the arm head fixing body, and there is no need for difficult positioning and fitting and attachment of the two is extremely easy.

In this way, the wiper arm is fixed to the pivot shaft in two stages with the arm head fixing member interposed, so that it can be done extremely easily and reliably.

<Example> The details of this invention will be explained below based on the drawings. Note that the same reference numerals will be used for parts that are common to the conventional one, and redundant explanation will be omitted.

1 to 3 are diagrams showing an embodiment of this invention.

The arm head fixing body 20 has a flat base portion 2.
1 is integrally provided with a protrusion 22 as a "male fitting part", and the base part 21 has a pair of left and right arm head mounting holes 23, and the protrusion 22 has a linear hole for regulating the mounting angle. Side portions 24 are provided respectively. A reverse tapered serration section 25 and an insertion hole 26 are formed in the center of the interior of the base section 21 and the convex section 22. The reverse taper serration portion 25 is
It is a "serration" corresponding to the taper serration part 2 of the pivot shaft 1, and the insertion hole 26
is of a size that allows the threaded portion 7 at the tip of the pivot shaft 1 to be inserted therethrough.

At the bases 29 and 30 of each arm head 27 and 28 of the fully concealed type wiper arm 3 and the semi-concealed type wiper arm 16,
Holes 31 and 32 as "fitting female parts" and a pair of left and right mounting holes 33 and 34 are formed, respectively. The holes 31 and 32 have a shape and size corresponding to the shape and size of the side surface 35 of the convex portion 22, and linear side portions 36 and 37 for regulating the mounting angle, respectively.
It is provided.

Next, replacement and installation of the wiper arms 3 and 16 will be explained.

() Arm head fixing body 2 to pivot shaft 1
0 Installation First, make the reverse taper serration portion 25 of the arm head fixing body 20 correspond to the taper serration portion 2 of the pivot shaft 1, and align the direction of the convex portion 22 [arrow C] with the predetermined direction of the wiper arms 3, 16 [ positioning and fitting to match arrow D],
Thereafter, the arm head fixing body 20 is fastened and fixed to the pivot shaft 1 by screwing the nut 6 into the threaded portion 7 at the tip of the pivot shaft 1.

() Attaching the arm head 27 of the wiper arm 3 to the arm head fixing body 20 For example, when attaching a fully concealed type wiper arm 3 to the arm head fixing body 20, first attach the hole 31 of the arm head 27 to the pivot shaft 1 by serration connection. It is attached to the convex portion 22 of the arm head fixing body 20 that is provided. At this time, the linear sides 24 and 36 of the arm head fixing body 20 and the arm head 27
As shown in FIG. 3, the two are connected to each other at a unique mounting angle θ, and when the base 29 of the arm head 27 is placed on the base 21, the pair of left and right arm head mounting holes of the base 21 are connected to each other. The wiper arm 3 is attached to the arm head fixing body 20 by positioning the attachment hole 33 of the arm head 27 correspondingly to the wiper arm 23 and screwing the attachment bolt 38 thereto as a "attachment means".

() Replacing the wiper arms 3 and 16 with respect to the arm head fixing body 20 Fully concealed type wiper arm 3
, Semiconductor shield type wiper arm 1
6, it is sufficient to unscrew the mounting bolt 38, remove the wiper arm 3, and then attach the semi-concealed type wiper arm 16 in the same manner as in () above.

As a result, the linear sides 24 and 37 of the arm head fixing body 20 and the arm head 28 are connected to each other at a unique mounting angle θ, and the base 3 of the arm head 28 is mounted on the base portion 21.
0 is placed, insert the arm head 2 into the pair of left and right arm head mounting holes 23 of the base portion 21.
The wiper arm 16 is attached to the arm head fixing body 20 by correspondingly positioning the attachment holes 34 of 8 and threading the attachment bolts 38 thereto.

As mentioned above, it is difficult to attach the wiper arms 3, 16 directly to the taper serration section 2, but as in this embodiment, the wiper arms 3, 16 can be attached directly to the taper serration section 2.
The arm head fixing body 20, which is relatively easy to position and fit, is used for the wiper arms 3 and 16, and then the wiper arms 3 and 16 are fitted by fitting the protrusion 22 and the holes 31 and 32, which are easier to position. Wiper arms 3 and 1 relative to pivot axis 1
Since the installation of the wiper arms 6 is carried out in two stages, only the wiper arms 3 and 16 can be replaced extremely easily.

In addition, in this embodiment, the arm heads 27, 2
8 holes 31, 32 and arm head fixing body 20
The shape and size of the convex portion 22 are not limited to the illustrated example.
The selection is arbitrary as long as it can be fixed.

<Effects> Since the wiper arm mounting structure of this invention is as explained above, (a) the arm head fixing body is fixed to the pivot shaft by connecting the taper serration part and the reverse taper serration part accordingly; Since the arm head of the rear wiper arm is attached to the arm head fixing body by fitting the male and female together, the wiper arm can be replaced only between the arm head fixing body and the wiper arm, which is extremely easy and reliable. Since it is easy to uncouple the mating part and re-mating the male and female parts, it is not necessary to directly uncouple the taper serration parts as in the past, so it does not require much force to remove the wiper arm. There is no need to manage the accompanying nut tightening torque, and (b) the structure of the arm head fixing body and the male and female fitting parts of the arm head can be fitted at only one installation angle, making positioning difficult. There is no need to do this, just position it and push it in, which has the effect of making it extremely easy to adjust the set position when replacing or installing the wiper arm.

[Brief explanation of the drawing]

1 is a schematic perspective view showing one embodiment of the wiper arm mounting structure according to this invention, FIG. 2 is an enlarged view of a broken main part of the arm head fixing body shown in FIG. 1, and FIG. FIG. 4 is a schematic perspective view showing a conventional wiper arm mounting structure, and FIG. 5 is a schematic perspective view showing the wiper arm mounting state. 1... Pivot axis, 2... Taper serration portion, 3, 16... Wiper arm, 4... Arm head, 10... Fully concealed type vehicle,
20...Arm head fixing body, 21...Protrusion (male fitting part), 25...Reverse taper serration part, 2
7, 28... Arm head, 31, 32... Hole (fitting female part).

Claims (1)

[Claims for Utility Model Registration] An arm head fixing having a reverse taper serration portion corresponding to a taper serration portion of a pivot shaft connected to a wiper interlocking mechanism of a vehicle, and an insertion hole continuous to the reverse taper serration portion. Body is,
With the threaded part of the pivot shaft inserted into the insertion hole and the tapered serration part fitted into the reverse taper serration part, a nut is screwed into the threaded part protruding from the insertion hole, thereby inserting the pivot shaft into the pivot shaft. a fitting male part for restricting the arm head to a unique mounting angle is formed on one of the arm head fixing body and the arm head, and a fitting female part is formed on the other, and the arm head is attached to the arm head fixing body by an independent attachment means different from the screw part and the nut in a state where the male and female fitting parts are fitted together. Features a wiper arm mounting structure.