JPH04191153A - Wet wiper valve - Google Patents

Abstract

PURPOSE:To improve the durability as a whole by moving an inner case by the pressure of the water and the like, and sealing between a rotary member, an upper sleeve, and an outer case with packings provided to the inner case. CONSTITUTION:While a pair of injection nozzles 6 positioning at both sides of a wiper blade provided, a rotary member 8 and a pivot holder 7, an upper sleeve 11 and an outer case 15, and an inner case 22 are provided. When the water or the like is fed through the pivot holder 7, the inner case 22 is moved by the pressure of the water or the like, and packings 17 and 19 provided to the inner case are to seal between the rotary member 8, the upper sleeve 11, and the outer case 15. As a result, the packings 17 and 19 are abutted to the opposite member only when the water is injected while rotating. Consequently, the time the packings 17 and 19 are abutted to the opposite member is reduced extensively, and the durability as a wet wiper valve 1 is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a wet wiper valve, and in particular, a wet wiper valve that rotates together with a wiper used to wipe the glass surface of an automobile, etc., and sprays water, etc. onto the glass surface. This relates to wet wiper valves used for

[Prior art and problems to be solved] Conventionally, wiper blades are installed on the glass surface of automobiles and used to wipe away water droplets. Among the wet wiper valves, the one shown in FIG. 4 is known.

That is, in the conventional wet wiper valve 41 shown in FIG. 4, a nut 4 is attached to the upper part of a shaft 43 whose lower end is connected to a link plate 42 of a link mechanism and is rotatable.
A wiper blade 45 is fixed via the shaft 4.
3 is inserted into the wet wiper valve 41.

This wet wiper valve 4I has a bond holder 47 at its lower part, and engages with the wiper blade 45 at its upper part to reciprocate as a unit, and injects water located on both sides of the wiper blade 45. It has a rotating member 48 having a pair of nozzles 46,46.

Note that the shaft 43 is provided with an E-ring 68 to prevent it from falling out of the pivot holder 47.

A packing 50 is interposed between the rotating member 48 and the pivot holder 47 on the inner circumferential surface thereof and the inner hanging portion 49 of the rotating member 48. An upper sleeve 51 is disposed at the upper part of the interior, and an O-ring 52 is interposed between the upper sleeve 51 and a hole 53 forming a flow path on the outer periphery of the lower part of the upper sleeve 51. Long hole 5
4 is provided with an outer case 55 having holes therein.

Therefore, a passage 56 communicating with each of the nozzles 46, 46 is formed by the amber sleeve 51 and the outer case 55 in the inner upper part of the rotating member 48.

Further, on the lower side of the outer case 55, a packing 57 is provided between the inner hanging part 49 of the rotating member 48,
In addition, gaskets 59 are interposed between the rotary member 48 and the outer hanging portion 5B, and the flow is connected to the hole 53 of the outer case 55 and the flow path 60 provided in the pivot holder 47. An inner case 62 having a passage 61 is provided, and a protrusion 63 located in the elongated hole 14 of the outer case 55 on the upper part of the inner case 62 determines the rotation range of the rotation member 48. are integrated.

In addition, 64 is a hair ring bushing disposed between the shaft 43 and the pot holder 47, and 65 is a hair ring bushing provided at the lower part of the inner hanging part 49 of the rotating member 48 so as to be positioned below the inner case 62. 66 is a nozzle provided in the wave path 60 of the pivot holder 47, and 67 is a connecting pipe provided in each nozzle 46, 46 of the rotating member 48.

In the conventional wet wiper valve 41 configured as described above, water etc. supplied to the nozzle 66 of the pivot holder 47 is first passed through a flow path 60 formed in the pivot holder 47 and a flow path provided in the inner sleeve 62. Road 61,
The liquid is ejected from each nozzle 46, 46 through a passage 56 provided in the inner upper part of the rotating member 48.

In this case, the water is sprayed from the nozzle 46 on the forward side in the advancing direction of the wiper blade 45, which rotates back and forth as the shaft 43 rotates, and the sprayed water is immediately wiped away by the wiper blade 45. There is.

During the above-mentioned operation, water is absorbed by the gaskets 57 and 59 located on both sides of the inner case 62 and sealing between the inner hanging portion 49 and the outer hanging portion 58 of the rotating member 48. This prevents the water that has flowed into the nozzle 66 of the pivot holder 47 from leaking outside the nozzle 46, 46 of the rotating member 48.

However, the gaskets 57 and 59 located on both sides of the inner case 62 and sealing between the inner hanging part 49 and the outer hanging part 58 of the rotating member 48 are attached to the inner case 62. Since it is always in contact with and sealing with the adjacent member, there is a problem in that the contact occurs even when water is not being sprayed, resulting in a decrease in its durability.

An object of the present invention is to provide a wet wiper valve that is attached to an inner case and can improve the durability of a gasket that seals between other adjacent members, thereby improving the overall durability. be.

[Means to solve the problem]

In order to achieve the above object, the first invention provides a wiper half that is attached to a shaft that rotates the wiper of an automobile or the like and sprays water or the like toward the front side in the direction of movement of the wiper blade. This wet wiper half has a pair of injection nozzles located on both sides of the wiper blade, a rotating member that is rotated integrally by the shaft, a pivot holder, and a pivot holder that directs water, etc. that has flowed into the pivot holder. An amber sleeve and an outer case are arranged between the rotary member and the pivot holder to guide the rotary member to the injection nozzle, and the gasket is movable toward and away from the upper sleeve and outer case. When water, etc. is supplied through the pivot holder, the inner case moves due to the pressure of the water, and the gasket provided thereon moves against the rotating member and the upper sleeve. This wet wiper valve is characterized by sealing between the wet wiper valve and the outer case.

As a second invention including the first invention, a wave path passing through the inner case is formed, and an orifice member is disposed in this flow path, and when water or the like passes through the orifice member, The wet wiper valve according to claim 1, wherein the inner case is moved by a pressure difference between the front and rear of the orifice member.

[Function] By employing the above means, the present invention is capable of causing the inner case to be damaged by the fluid pressure difference before and after the orifice member that occurs when water or the like is supplied through the nozzle and this water passes through the orifice member. At this time, the seal provided on the inner case is pressed to seal it.

Therefore, unlike sealing when the seal is always in contact with the seal, sealing occurs only after water, etc. is supplied. This improves the durability of the seal, and therefore the durability of the wet wiper valve as a whole. .

〔Example〕

Embodiments of the invention shown in the drawings will be described below.

FIG. 1 shows a wet wiper valve according to the present invention, and this wet wiper valve 1 is provided with a shaft 3 whose lower end is connected to a link plate 2 of a link mechanism so as to be rotatable. A wiper blade 5 is fixed to the upper part of the wiper blade 3 via a pad 4, and the shaft 3 is inserted therethrough.

The wet wiper valve 1 has a pivot holder 7 at its lower part, and engages with the wiper blade 5 at its upper part to reciprocate together and spray water located on both sides of the wiper blade 5. pair of nozzles 6
．． It has a rotating member 8 having a diameter of 6.

The shaft 3 is provided with an E-ring 29, which prevents the shaft 3 from being removed from the pivot holder 7.

Between the rotating member 8 and the pivot holder 7, a punching member 10 is interposed between the inner circumferential surface and the inner hanging portion 9 of the rotating member 8. An upper sleeve 11 located at the upper part of the inside is arranged,
On the outer periphery of the lower part of the upper sleeve 11, an outer case 15 is provided, in which a ring 12 is interposed between the upper sleeve 11 and a hole 13 and a long hole 14 forming a flow path. It is provided.

Therefore, in the inner upper part of the rotating member 8, the upper sleeve 11 and the outer case 15 form a passage 16 that communicates with each nozzle 6.6.

Further, on the lower side of the outer case 15, a packing 17 is provided between the inner hanging portion 9 of the rotating member 8, and a packing is also provided between the outer hanging portion 18 of the rotating member 8. 19, and the upper surface thereof is spaced apart from the outer case 15.
22 are arranged.

This inner case 22 has a packing 17.19 on the side.
The portion where the gasket 17 and 19 are located is formed so as to face diagonally upward, and the lip portions of the gaskets 17 and 19 are spaced apart from each other.

Furthermore, the inner case 22 has a flow path 2 provided in the hole 13 of the outer case 15 and the pivot holder 7.
A flow path 21 is formed which communicates with the flow path 2.
0 is provided with an orifice member 28 having a small diameter hole bored in the center thereof.

A protrusion 23 is integrally provided on the upper part of the inner case 22 and is positioned within the elongated hole 14 of the outer case 15 to restrict the rotation range of the rotation member 8.

Note that 24 is a bearing bush that is disposed between the shaft 3 and the pivot holder 7, and 25 is a bearing bush that is provided at the lower part of the inner hanging part 9 of the rotating member 8 and that is attached to the inner case 2.
26 is a nozzle provided in the wave path of the pivot holder 7, and 27 is a connecting pipe provided for each nozzle 6.6 of the rotating member 8.

Next, the operation of the above will be explained.

First, as in the conventional case, the water etc. supplied to the nozzle 26 of the pivot holder 7 is passed through the flow path 2o formed in the pivot holder 7, the flow path 21 provided in the inner case 22, and the inner upper part of the rotating member 8. Each nozzle 6.6 is adapted to inject via a passage 26 provided with two cylinders.

In this case, the water is sprayed from a nozzle 6 on the forward side in the advancing direction of the wiper blade 5, which rotates reciprocally as the shaft 3 rotates, and the sprayed water is immediately wiped away by the wiper blade 5.

During the above operation, the positional relationship between the inner case 22, the inner hanging portion 9 of the rotating member 8, the outer case 15, and the upper sleeve 11 is shown in FIGS. 2 and 3, and the nozzle 26 When water is not supplied through the inner case 22, as shown in FIG.
Since the upper sleeve 11 and the upper sleeve 11 are spaced apart from each other, the pankin 17 is held in a state where it is not deformed by pressure.

Although not shown, the same applies to the K gasket 19.

When water is supplied, the water flows from the nozzle 26 into the flow path 20 of the pivot holder 7, as shown in FIG. 3, and further flows into the flow path 21 of the inner case 22. Since the orifice member 28 is provided in the inner case 2, a difference in fluid pressure occurs between the upper and lower sides of the orifice member 28, and this difference in fluid pressure causes the inner case 2 to
2 rises until its upper part contacts the lower surface of the outer case 15 and the amber sleeve 11.

Therefore, the gaskets 17 and 19 provided on the inner and outer circumferential sides of the inner case 22 come into contact with the inner hanging part 9 and the outer hanging part 18 of the rotating member 8, and slide when the rotating member 8 rotates. It will be sealed while doing so.

Therefore, the gaskets 17 and 19 are not always in contact with the side, but are in contact with and seal only when water is to be injected.

For this reason, the durability of the gaskets 17 and 19 on both sides is significantly improved.

〔Effect of the invention〕

By configuring this invention as described above, the seal contacts and seals the mating member only when rotating and jetting water, and therefore the time for the seal to contact the mating member is greatly shortened. This has the effect of significantly improving the durability of the gasket and improving the durability of the wet wiper valve.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing a wet wiper valve according to the present invention, and FIGS. 2 and 3 are schematic sectional views showing the positional relationship between the inner case, the inner hanging part of the rotating member, the outer case 15, and the upper sleeve. , FIG. 4 is a schematic sectional view showing a conventional wet wiper valve. 1.41...Wet wiper valve 2.42
...Link plate 3.43...Shaft 4.44...Wiper blade 6.46...Nozzle 7 .47... Pivot holder 8.48...
... Rotating member 9.49 ... Inner hanging part 10.50 ... K packing 51 ... Upper sleeve 12.52.
...0 ring 13.53 ... hole 14.54 ... long hole 15.55 ... outer case 16.56 ...
...Passage 17.57...K Pankin 18.58...Outside hanging part 19.59 River...K Punkin 20.60...Flow path 21. 61...Flow path 22.62...Inner case 23.63...Protrusion 24.64...Bearing bush 25.65
... Stopper 26.66 ... Nozzle 27.67 ... Connection pipe 28 ... Orifice member 29.68 ... E-ring patent application People NOkay Co., Ltd. (Mini Figure 2)

Claims (1)

[Claims] (1) A wet wiper valve (1) that is attached to a shaft (3) that rotates the wiper of an automobile, etc., and is configured to spray water, etc. to the front side of the wiper blade (5) in the direction of movement. The wet wiper valve (1) has a pair of injection nozzles (6) located on both sides of the wiper blade (5).
) and is integrally rotated by the shaft (3), and a pivot holder (7);
The rotating member (
an upper sleeve (11) and an outer case (15) disposed between the pivot holder (7) and the upper sleeve (11) and the outer case (15); ,rubber seal(
17, 19) are attached, and when water or the like is supplied through the pivot holder (7), the inner case (22) is moved by the pressure of the water or the like. and the gasket (17,
19) is the rotating member (8) and the upper sleeve (11).
) and an outer case (15). (2) A flow path (20) is formed in the inner case (22) passing through it, and an orifice member (28) is disposed within the flow path (22) to allow water to flow through the orifice member (28). 2. The wet wiper valve according to claim 1, wherein the inner case (22) is moved by a pressure difference across the orifice member (28) that occurs when the wiper valve passes through the orifice member (28).