WO2011080885A1

WO2011080885A1 - Blade rubber

Info

Publication number: WO2011080885A1
Application number: PCT/JP2010/007325
Authority: WO
Inventors: 小嶋淳太郎
Original assignee: 株式会社カーメイト
Priority date: 2009-12-29
Filing date: 2010-12-17
Publication date: 2011-07-07
Also published as: JP2011136672A; CN202728171U; KR20120076374A; KR101320745B1; JP5528795B2

Abstract

Provided is a blade rubber which can be satisfactorily used even when it is raining or when it is snowing. An engaging part that engages with a wiper blade main body is formed in an upper section, a wiping part is formed in a lower section, a neck part that has reduced lateral width is formed between the engaging part and the wiping part, and a support part that widens in the lateral direction and has leading ends respectively extending downward is formed above the neck part. Widened lower surfaces, which have left and right respective side surfaces that gradually widen in the upward direction, and widened upper surfaces, which have side surfaces that gradually narrow in the upward direction, are formed in the wiping part. The widened upper surfaces in a no-load state are formed by constituent surfaces of 45° or less with respect to a vertical line, and when either one of the left or right widened upper surfaces comes into contact with the support part, the constituent surface of the other left or right widened upper surface is formed so as to be disposed in a range of inclination of ±15° or less with respect to the vertical line. The total dimensions of the widened upper surfaces and the widened lower surfaces in a no-load state are formed longer than the dimensions of the neck part.

Description

Blade rubber

The present invention relates to a blade rubber used for wiping a window glass, and is mainly used for automobiles, but can also be used for railways, ships, aircrafts, etc., and is a movable wiper arm. It is used by being attached to a connected wiper blade body. The present invention further relates to a blade rubber suitable for use in both rainy weather conditions and snow conditions.

If the wiper blade body has a structure that is suitable for use during snowfall without providing exposed metal parts as much as possible, and if the wiper blade body is equipped with a conventional rain blade rubber and wipes off the snow attached to the window glass, Since wiping has higher wiping resistance than rainwater wiping, the blade rubber collapses due to the wiping resistance, causing the blade rubber to get over the snow on the window, resulting in wiping failure. In particular, when the snow has a high molten water content ratio and heavy snow quality, or when the absolute amount is large, the above-mentioned problem is remarkable. Therefore, in the conventional snow blade rubber, as shown in FIG. 9, excessively falling of the blade rubber 1 at the time of wiping is prevented by the relatively wide neck 90. As a result, the wiping portion 5 of the blade rubber 1 is not sufficiently tilted down when wiping rainwater, which has a low resistance during wiping, resulting in problems such as poor wiping and generation of chatter noise.

Therefore, in the conventional rain blade rubber, for example, as shown in FIG. 10, a width enlarged portion 92 having an enlarged left and right width is formed on the upper portion of the wiping portion 5 of the blade rubber 1, and above the width enlarged portion 92. Forms a neck portion 91 with the left and right widths reduced, and forms a support portion 93 with the width of each neck portion 91 extending downward and the respective left and right tip portions extending downward. A pair of left and right slits are formed by the upper surface of the base, the neck portion 91, and the inner surface of the support portion 93, and the wiping portion is brought into contact with the width expanding portion 92 and the support portion 93 with the neck portion 91 as a fulcrum at the time of wiping. A configuration that prevents 5 from falling excessively is generally used.

However, the conventional rain blade rubber described above has a small inclination on the upper surface of the lower width enlarged portion 92, so that when it is used during snowfall, the snow adhering to the upper surface of the lower width enlarged portion 92 becomes clogged in the slit and gradually becomes clogged. However, it was used only for blade rubber for rain.

As another conventional technique, as shown in FIGS. 11 and 12, separate leg portions 94 extending downward are disposed on the left and right at the upper portion of the wiping portion 5 of the blade rubber 1, and are sufficiently flexible during wiping. A configuration is disclosed in which upper portions 95 of the wiping portions 5 of the blade rubber 1 formed in the above are fixed to the leg portions 94 so as to closely match the shape according to the wiping direction.

Whether the above prior art is for rain, for snow, or for both rain and snow is not specified, but when this structure is used for snow, The snow that has entered between the portion 94 and the upper portion 95 of the wiping portion 5 is sandwiched between the leg portion 94 and the upper portion 95 of the wiping portion 5, thereby obstructing the adhesion of the upper portion 95 of the wiping portion 5 to the leg portion 94. There is a problem that the tilting angle of the wiping unit 5 is not stable, and further, snow sandwiched between the leg part 94 and the upper part 95 of the wiping part 5 adheres to the upper part of the wiping part, and the gradually attached snow expands and grows. Finally, there was a drawback that it was difficult to wipe.

JP 2008-126853 A Special table 2004-518577 gazette JP-A 63-255159

The problem to be solved by the present invention is to obtain a blade rubber that can maintain good wiping performance during use during snowfall and at the same time can be used well during rainfall.

In the blade rubber of the present invention, a base part configured to be engageable with the wiper blade main body is formed on the upper part, and a wiping part for wiping rainwater and snow attached to the window glass is formed on the lower part. A neck portion with a reduced left and right width is formed between them, and a support portion is formed above the neck portion so that the width increases in the left-right direction and the left and right tip portions extend downward. A lip portion with a reduced left and right width is formed, and at the upper portion of the lip portion, a width-enlarged lower surface is formed in which the widths of the left and right side surfaces gradually increase toward the upper side. A width-enlarging upper surface is formed in which the width of each of the left and right side surfaces gradually decreases toward the upper side. The slit is shaped In the blade rubber, the left and right width-enlarged upper surfaces in the unloaded state are formed with a configuration surface of 45 ° or less with respect to the center line of the base, and the width-enlarged upper surface of the wiping portion is the above when wiping the window glass. In the state where either the left or right width-enlarged upper surface is in contact with the support portion, either the left or right of the width-enhancing upper surface is configured with respect to the base center line. It is configured to be arranged in an inclination range of ± 15 ° or less, and the total dimension in the base centerline direction of the width-expanded lower surface and the width-expanded upper surface in the no-load state is longer than the dimension of the neck portion in the base centerline direction. It is characterized by being formed.

Furthermore, a space is formed in the slit on the contact side in a state where the width-enlarging upper surface of the wiping portion is in contact with the support portion, and the space between the width-enlarging upper surface 53 of the space portion and the support portion 7 is the maximum. It is preferable that the minimum distance W2 between the abutting portions of the support portion and the wiping portion in the no-load state is larger than the large W1.

The present invention maintains the wiping performance during use during snowfall, and at the same time has the effect of obtaining a blade rubber that can be used well during rainfall.

It is sectional drawing which shows the no-load state of the Example of this invention. It is sectional drawing which shows the time of wiping of the Example of this invention. It is operation | movement explanatory drawing of the Example of this invention. It is operation | movement explanatory drawing of the Example of this invention. It is operation | movement explanatory drawing of the Example of this invention. It is operation | movement explanatory drawing of the Example of this invention. It is sectional drawing which shows the no-load state of the modification of the Example of this invention. It is sectional drawing which shows the time of wiping of the modification of the Example of this invention. It is explanatory drawing of a prior art. It is explanatory drawing of a prior art. It is explanatory drawing of a prior art. It is explanatory drawing of a prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the present invention in a no-load state, and FIG. 2 is a cross-sectional view showing the wiping state of the present invention.

The blade rubber 1 of the present embodiment is formed with a base portion 4 configured to be engageable with a wiper blade main body 2 connected to a wiper arm (not shown) as a movable body at an upper portion and a window glass 3 at a lower portion. A wiping portion 5 for wiping off attached rainwater and snow is formed. The blade rubber 1 is formed symmetrically with respect to the base center line 43 corresponding to the center line in the left-right direction of the base 4. In addition, in the manufacturing process, since the base center line 43 is extruded in a tandem shape in which the base center line 43 is laid down, strictly speaking, a slight difference occurs between the left and right, but the difference within the range of the dimensional tolerance is In practice, it is regarded as symmetrical.

A neck portion 6 having a reduced left-right width is formed between the base portion 4 and the wiping portion 5. The width is increased in the left-right direction above the neck portion 6, and the left and right tip portions extend downward. A support portion 7 is formed. The base 4 of the blade rubber 1 includes a width reducing portion 41 formed above the support portion 7 and a width expanding portion 42 formed above the width reducing portion 41.

1 and 2, the wiper blade main body 2 has a hollow portion extending in the horizontal direction at a substantially central portion and penetrating in the longitudinal direction. The pressing force of the blade rubber to the window glass is provided in the hollow portion. A spline 23 is arranged to be used in order to keep it within an appropriate range over the entire longitudinal direction. The wiper blade main body 2 has a substantially C-shaped holder portion 22 below the wiper blade body 2, and an open end 21 is formed at the lower end. Then, the width enlarged portion 42 of the blade rubber 1 is accommodated in the holder portion 22, and the open end 21 of the substantially C-shaped portion enters the width reduced portion 41 of the blade rubber 1, whereby the blade rubber 1 is wiped. Engaged with the blade body 2. The shape of the base 4 is not limited to the present embodiment, and existing techniques can be used appropriately. The spline 23 is not disposed in the blade rubber main body, and a hollow portion (not shown) is provided inside the width enlarged portion 42 of the blade rubber 1, and a spline (metal or resin molded in the hollow portion). A spring member (not shown) may be inserted.

The lower part of the wiping part 5 is reduced in width in the left and right direction, and a lip part 51 is formed in contact with the window glass. The upper part of the lip part 51 has a width-enhanced lower surface 52 in which the widths of the left and right side surfaces gradually increase. In the upper part of the width-enlarging lower surface 52, a width-enlarging upper surface 53 in which the widths of the left and right side surfaces are gradually reduced is formed. A pair of left and right slits 8 is formed by the width-enlarging upper surface 53, the neck 6 adjacent to the uppermost portion of the width-enhancing upper surface 53, and the inner surface of the support portion 7.

The component surface of the width-enlarged upper surface 53 in an unloaded state is formed to have a maximum angle A of 45 ° or less with respect to the base center line 43. Further, when the window glass is wiped, the wiping portion 5 is inclined in the non-wiping direction mainly from the neck portion 6 (the neck portion 6 and its adjacent portion), and the width-enlarging upper surface 53 of the wiping portion is the inner surface of the support portion 7. In the state in which either the left or right width-enlarged upper surface 53 is in contact with the support portion 7, the left or right side of the width-enhanced upper surface 53 constitutes the base center line 43. On the other hand, it is configured to be arranged in an inclination range B of ± 15 ° or less.

And the total dimension of the base centerline 43 direction (vertical direction in the drawing) of the width-enlarging lower surface 52 and the width-enlarging upper surface 53 in the no-load state is the base centerline 43 direction (vertical direction in the drawing) of the neck 6. It is formed longer than the dimension.

Furthermore, in the blade rubber 1 of this embodiment, a space 82 is formed in the slit 8 on the contact side in a state where the width-enlarging upper surface 53 of the wiping unit 5 is in contact with the support 7, and the space 8 The minimum distance W2 between the contact portions of the support portion 7 and the wiping portion 5 in the no-load state is formed larger than the maximum width W1 between the width-enlarged upper surface 53 and the support portion 7.

The manufacturing process of the blade rubber 1 according to the present embodiment is usually formed in the longitudinal direction in a state where two sets of blade rubbers are attached to each other at the tip of the lip, and the two sets of blade rubbers are separated by post-processing. It is cut into long lengths. It is also possible to partially change the cross-sectional shape by post-processing. The blade rubber of the present invention may use other existing molding methods such as injection molding. In the present embodiment, the cost can be reduced by integrally molding the engaging portion 4, the wiping portion 5, the neck portion 6, and the support portion 7. However, in the present invention, the support portion 7 is not necessarily provided. For example, a pair of left and right support portions (not shown) continuous in the longitudinal direction may be formed at the lower end portion of the wiper blade body 2.

In the use state of this embodiment, as shown in FIG. 3, the width-enlarging upper surface 53 formed on the upper portion of the wiping portion 5 has a configuration surface (width of 45 ° or less with respect to the base centerline 43 as a whole. Since the maximum angle A of the enlarged upper surface 53 is 45 ° or less), the snow 9 that has accumulated on the blade rubber 1 can be easily dropped.

The blade rubber 1 according to the present embodiment is configured such that the wiping portion 5 is inclined mainly from the neck portion 6 at the time of wiping, and the widened upper surface 53 of the wiping portion 5 comes into contact with the support portion 7 so that the maximum of the wiping portion 5 is reached. Since the falling angle is regulated, the wiping part 5 is snowfall that increases the wiping resistance even if the minimum width of the neck part 6 is narrowed to the same width as the existing rain blade rubber so that the wiping part 5 may fall down even when used during rain. Excessive tilting during use is prevented, and the wiping unit 5 can always obtain the same tilting angle. Therefore, it is possible to prevent wiping defects and chatter noises from occurring during use as much as possible. Riding and wiping failure due to excessive wiping of the wiping part can be prevented.

Further, as shown in FIG. 4, in the state where either the left or right width-enlarged upper surface 53 is in contact with the support portion 7, the left or right side of the width-enhanced upper surface 53 constitutes the base center line 43. On the other hand, it is configured so as to be arranged in an inclination range B of ± 15 ° or less, and is in a nearly vertical state, so that it is possible to easily drop snow accumulated on the width-enlarged upper surface 53 of the blade rubber 1 during the wiping operation. At the same time, when the large snow mass 91 falls from the roof or the like, the above-mentioned snow mass can be strongly pushed out by wiping and moving the width expansion upper surface 53 at an angle close to the vertical.

And the total dimension of the base centerline 43 direction (vertical direction in the drawing) of the width-enlarging lower surface 52 and the width-enlarging upper surface 53 in the no-load state is the base centerline 43 direction (vertical direction in the drawing) of the neck 6. Therefore, when the window glass is wiped, the portion that becomes the base point of the inclination of the wiping portion can be limited to the neck portion 6 and its adjacent portion. The inclination angle of the wiping portion 5 when the width-enlarging upper surface 53 of the wiping portion 5 comes into contact with the support portion 7 can be stabilized.

Further, the blade rubber 1 of the present embodiment has a space 82 formed in the slit 8 on the contact side in a state where the width-enlarged upper surface 53 of the wiping unit 5 is in contact with the support unit 7. When the snow 92 adheres to the slit 8 as shown in FIG. 5 due to use under bad conditions such as relatively high temperature and snow that is semi-melted, and the like, as shown in FIG. The snow 92 is compressed in the slit 8 when the wiping part 5 falls in the direction in which the support part 7 abuts, and the space 82 is in the state where the widened upper surface 53 and the support part 7 abut on each other. The snow 92 is compressed and solidified to a width W1 equal to the maximum width W1 between the width-enlarged upper surface 53 and the support portion 7. Then, the snow 92 that has been compressed and solidified by the above process is easily removed from the gap of the distance W2 between the support portion 7 in the slit 8 and the contact portion of the wiping portion 5 with the wiping portion 5 falling back. Since it is discharged, there is an effect of preventing the occurrence of wiping failure due to the snow that has entered the slit 8 growing.

In addition, although the modification of the Example of this invention is shown in FIG.7, FIG.8, the right range of this invention is not limited to the shape of FIGS. 1-8 which is an Example of the blade rubber of this invention, The shape can be appropriately changed without departing from the spirit of the invention.

The blade rubber of the present invention can be effectively used industrially as a wiper blade-like blade rubber used for wiping a window glass.

1: blade rubber, 2: wiper blade main body, 3: window glass, 4: base, 5: wiping portion, 6: neck, 7: support, 8: slit, 21: opening, 22: holder, 23: Spline 41: Width reduction part 42: Width enlargement part 43: Base part center line 51: Lip part 52: Width enlargement lower face 53: Width enlargement upper face 71: Lower end part 81: Upper end 82: Space Part, 83: snow, 84: snow mass, 85: snow, 90: neck, 91: neck, 92: lower width enlarged part, 93: upper width enlarged part, 94: leg part, 95: upper part

Claims

A base part that can be engaged with the wiper blade body is formed at the upper part, and a wiping part that wipes rainwater and snow attached to the window glass is formed at the lower part. The width between the base part and the wiping part is reduced. A support portion is formed above the neck portion, the width of which extends in the left-right direction and the left and right tip portions extend downward,
The lower part of the wiping part is formed with a lip part with a reduced left-right width, and the upper part of the lip part is formed with a width-enhanced lower surface in which the width of the left and right side surfaces gradually increases toward the upper side. On the upper part of the enlarged lower surface, a width enlarged upper surface is formed in which the widths of the left and right side surfaces gradually decrease toward the upper side,
In the blade rubber in which a pair of left and right slits are formed by the width-enlarged upper surface, the neck portion adjacent to the uppermost portion of the width-enhanced upper surface, and the support portion inner surface,
The width-enhanced upper surface of each of the left and right in an unloaded state is formed with a configuration surface of 45 ° or less with respect to the base center line,
Furthermore, when the window glass is wiped, the width expansion upper surface of the wiping portion is configured to come into contact with the support portion,
In a state where either the left or right width-enlarged upper surface is in contact with the support portion, the left or right side of the other width-enlarged upper surface is disposed within an inclination range of ± 15 ° or less with respect to the base center line. Configured to
A blade rubber characterized in that a total dimension in the base centerline direction of the width-enlarged lower surface and the width-enhanced upper surface in an unloaded state is longer than a dimension of the neck portion in the base centerline direction.
In the state where the upper surface of the wiping portion is in contact with the support portion, a space is formed in the slit on the contact side,
The minimum distance W2 between the contact part of the support part and the wiping part in the no-load state is formed larger than the maximum width W1 between the upper surface of the space and the support part. The blade rubber according to claim 1.