JP2014125057A - Washing device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the flow state of a cleaning fluid.SOLUTION: A washing device for a vehicle includes: a joint 2 having a passage 2a in which a cleaning fluid 300 flows and a delivery port 9 for delivering the cleaning fluid; a nozzle holder 3 to which the joint is connected, the nozzle holder 3 in which the cleaning fluid delivered from the delivery port flows; a coil spring 14 which is disposed in the nozzle holder and expands and contracts in a flow direction of the cleaning fluid; a nozzle 4 which discharges the cleaning fluid to the exterior; and a valve 15 which is attached to the coil spring, is moved with the coil spring, and opens and closes the delivery port of the joint. When the valve is moved and the delivery port is opened, a first flow passage 7c in which the cleaning fluid flows is formed at the outer side of the valve and a second flow passage 10a continuing into the first flow passage and in which the cleaning fluid flows toward the nozzle is formed in the nozzle holder. A flow area of the cleaning fluid in the second flow passage is larger than a flow area of the first flow passage.

Description

  The present invention relates to a vehicle cleaning apparatus. More specifically, the present invention relates to a technical field for stabilizing the flow state of the cleaning liquid by making the flow areas of the first flow path and the second flow path through which the cleaning liquid flow different.

Japanese Utility Model Publication No. 63-201653 Japanese Utility Model Publication No. 1-142359

  There is a cleaning device in which a part protrudes from an opening formed in a vehicle body or a bumper, and a cleaning liquid is sprayed from a nozzle to clean the surface of a cover of a vehicle lamp.

  The cleaning device is attached to the coil spring, which is provided on the front end side and ejects the cleaning liquid, a nozzle holder (nozzle case) that holds the nozzle, a coil spring that is disposed inside the nozzle holder and expands and contracts in the flow direction of the cleaning liquid. Some include a valve that is moved together with a coil spring (see, for example, Patent Document 1 and Patent Document 2).

  In such a cleaning device, when the cleaning liquid is supplied to the nozzle holder, the liquid pressure of the cleaning liquid increases, so that the coil spring is compressed and the valve is moved together with the coil spring, and the delivery port closed by the valve is opened. The cleaning liquid is fed into the nozzle holder and sprayed from the nozzle.

  However, in the type in which the coil spring is compressed, the valve is moved, and the delivery port is opened and closed as in the cleaning devices described in Patent Document 1 and Patent Document 2, depending on the size of the flow area (cross-sectional area) of the cleaning liquid The following problems may occur.

  For example, if the flow area of the cleaning liquid is too large, when the delivery port is opened by the valve, the fluid pressure decreases, the coil spring extends and the valve is moved in the direction of closing the delivery port, and the valve is moved out of the delivery port. When moved in the closing direction, the hydraulic pressure increases again, the coil spring is compressed, and the valve is moved in the direction to open the delivery port. If such a state is repeated, so-called chattering in which the valve is reciprocated by alternately compressing and extending the coil spring occurs. Therefore, the opening state of the delivery port by the valve becomes unstable, and the stabilization of the cleaning liquid injection state is hindered.

  On the other hand, if the flow area of the cleaning liquid is too small, the flow resistance to the cleaning liquid increases and pressure loss occurs, and the required injection pressure and injection amount of the cleaning liquid sprayed from the nozzle cannot be ensured, and the cleaning power by the cleaning liquid decreases. Resulting in.

  Accordingly, an object of the cleaning apparatus of the present invention is to stabilize the flow state of the cleaning liquid.

  In order to solve the above-described problems, a vehicular cleaning apparatus includes a joint having a flow path through which a cleaning liquid supplied from a supply tank flows and a delivery port for sending out the cleaning liquid, and the joint is connected to the joint. A nozzle holder through which the cleaning liquid sent out from the outlet flows; a coil spring disposed inside the nozzle holder that expands and contracts in the flow direction of the cleaning liquid; and a discharge port for discharging the cleaning liquid to the outside. A nozzle that is held by a holder, and a valve that is attached to the coil spring and moves together with the coil spring to open and close the delivery port of the joint, and the outside of the valve when the valve is moved and the delivery port is opened A first flow path through which the cleaning liquid flows is formed in the nozzle holder; A second flow path is formed in which the cleaning liquid flows toward the nozzle, and the flow area of the cleaning liquid in the second flow path is larger than the flow area of the first flow path. It has been done.

  Therefore, in the vehicular cleaning device, when the cleaning liquid flows, a state in which the outlet is opened by the valve due to the high hydraulic pressure in the first flow path is ensured, and the cleaning liquid is discharged in the second flow path. Good fluidity is ensured.

  The vehicle cleaning apparatus according to the present invention includes a joint having a flow path through which a cleaning liquid supplied from a supply tank flows and a delivery outlet for sending out the cleaning liquid, and the cleaning liquid fed from the delivery outlet of the joint connected to the joint. A nozzle holder that flows inside, a coil spring that is arranged inside the nozzle holder and expands and contracts in the flow direction of the cleaning liquid, and a nozzle that has a discharge port for discharging the cleaning liquid to the outside and is held by the nozzle holder And a valve attached to the coil spring and moved together with the coil spring to open and close the delivery port of the joint, and the cleaning liquid flows outside the valve when the valve is moved and the delivery port is opened. A first flow path is formed, and the nozzle holder is continuous with the first flow path inside the nozzle holder. A second flow path through which the cleaning liquid flows toward the first flow path is formed, and a flow area of the cleaning liquid in the second flow path is made larger than a flow area of the first flow path. .

  Accordingly, a high liquid pressure of the cleaning liquid in the first flow path is ensured and the state where the delivery port is opened is maintained, and the flow resistance with respect to the cleaning liquid in the second flow path is small, and the cleaning liquid ejected from the nozzle is sufficient. The injection pressure and the injection amount are ensured, and the flow state of the cleaning liquid can be stabilized.

  In addition, a stable flow area of the first flow path can be ensured, and a stable flow area of the second flow path can be ensured to ensure a sufficient injection pressure and injection amount of the cleaning liquid injected from the nozzle. be able to.

  In the invention described in claim 2, the first flow path is formed inside the joint, and the flow areas of the first flow path and the second flow path are determined by the thickness of the joint. I try to make them different.

  Accordingly, the flow areas of the first flow path and the second flow path can be made different without increasing the number of parts, and the flow condition of the cleaning liquid can be stabilized while ensuring the simplification of the structure. Can do.

  In the invention described in claim 3, the joint surface is inclined toward the outer peripheral side as it goes in the flow direction of the cleaning liquid and guides the cleaning liquid from the first flow path to the second flow path. Is formed.

  Accordingly, the cleaning liquid can be surely flowed in the second flow path while ensuring the simplification of the structure of the cleaning apparatus without increasing the number of parts, and the cleaning liquid is excellent in that the vortex is hardly generated in the vicinity of the guide surface. Can be ensured.

  In addition, since the change in flow rate when the cleaning liquid flows from the first flow path to the second flow path becomes gentle, the valve can be held in a stable state at a predetermined position when the cleaning liquid flows.

  In the invention described in claim 4, a guide surface for guiding the cleaning liquid from the first flow path to the second flow path is formed in the valve.

  Therefore, it is possible to reliably flow the cleaning liquid in the cleaning liquid flow path while ensuring simplification of the structure of the cleaning apparatus without increasing the number of parts.

  In addition, since the change in flow rate when the cleaning liquid flows from the first flow path to the second flow path becomes gentle, the valve can be held in a stable state at a predetermined position when the cleaning liquid flows.

FIG. 2 to FIG. 5 show the best mode of the vehicle washing apparatus of the present invention, and this figure is a sectional view of the washing apparatus attached to a vehicle body or a bumper. It is a disassembled perspective view of a washing | cleaning apparatus. It is sectional drawing of a washing | cleaning apparatus. It is an expanded sectional view which shows the 1st flow path and 2nd flow path through which a washing | cleaning liquid is flowed. It is sectional drawing which shows the flow path | route of a washing | cleaning liquid.

The best mode for carrying out the vehicle cleaning apparatus of the present invention will be described below with reference to the accompanying drawings.
In the following, an example in which the vehicle cleaning device is applied to a vehicle lamp cleaning device will be described. However, the application of the vehicle cleaning device of the present invention is not limited to the vehicle lamp cleaning device. It can be widely applied as a cleaning device for each part provided in a vehicle such as a mirror.

  The cleaning device 1 has a joint 2, a nozzle holder 3, and a nozzle 4 (see FIG. 1).

  The joint 2 includes a first annular portion 5, a pressing portion 6 projecting inward from one end portion in the axial direction of the first annular portion 5, and an inner peripheral portion of the pressing portion 6. And a second annular portion 7 projecting in the axial direction (see FIGS. 2 and 3).

  An inner flange portion 8 projecting inward is provided inside the second annular portion 7, and an inner portion of the inner flange portion 8 is formed as a delivery port 9. A leading surface 7a is formed at the tip of the second annular portion 7 so as to be inclined so that its diameter increases toward the tip. A space from the inner flange portion 8 to the guide surface 7a inside the second annular portion 7 is formed as an insertion space 7b. In the insertion space 7b, when a later-described nozzle is moved and the delivery port 9 is opened, a space inside the guide surface 7a is formed as the first flow path 7c.

  Of the internal space of the joint 2, the space on the first annular portion 5 side from the delivery port 9 is formed as a flow path 2a.

  The nozzle holder 3 includes a cylindrical base portion 10, a holding portion 11 provided continuously in the axial direction on the base portion 10, a forming surface portion 12 provided inside the base portion 10, and a support protrusion 13 protruding from the forming surface portion 12. Consists of.

  In the nozzle holder 3, the second annular portion 7 of the joint 2 is press-fitted into the base portion 10, and the joint 2 is connected to the nozzle holder 3. In a state where the joint 2 is connected to the nozzle holder 3, the pressing portion 6 of the joint 2 is pressed against one end surface of the base portion 10.

  As for the internal space of the base 10, the outer peripheral part is formed as the 2nd flow path 10a. The flow areas (cross-sectional areas) A and A of the second flow path 10a are larger than the flow areas B and B of the first flow path 7c formed in the joint 2 (see FIG. 4). Note that these flow areas (cross-sectional areas) are cross-sectional areas in a direction orthogonal to the flow direction of the cleaning liquid.

  The holding part 11 is formed in a substantially cylindrical shape whose outer diameter is larger than that of the base part 10, and the length in the axial direction is shorter than that of the base part 10. The inner surface of the holding part 11 is formed in a curved surface shape (see FIGS. 2 and 3).

  The formation surface portion 12 is provided at an end portion of the base portion 10 on the holding portion 11 side, and is formed in a plate shape facing the axial direction of the nozzle holder 3. Communication holes 12a, 12a,... Are formed in the outer peripheral portion of the forming surface portion 12 at regular intervals in the circumferential direction. The communication holes 12 a, 12 a,... Are formed in an arc shape with the central axis of the nozzle holder 3 as the center, and communicate with the second flow path 10 a of the base 10.

  The support protrusion 13 protrudes from the inner side of the communication holes 12a, 12a,... In the formation surface portion 12 to the opposite side of the holding portion 11 in the axial direction of the nozzle holder 3.

  A coil spring 14 is disposed inside the base 10 of the nozzle holder 3. The coil spring 14 is a compression coil spring, and one end thereof is externally fitted to and supported by the support protrusion 13. The outer diameter of the coil spring 14 is smaller than the inner diameter of the base portion 10, and a substantially cylindrical space is formed on the outer peripheral side of the coil spring 14 inside the base portion 10, and this space serves as the second flow path 10 a.

  A valve 15 is attached to the other end of the coil spring 14. The valve 15 includes an insertion portion 16 extending in the axial direction of the coil spring 14 and an opening / closing portion 17 provided continuously at one end portion in the axial direction of the insertion portion 16.

  The opening / closing part 17 is provided with a flange part 17 a projecting outward from the inserted part 16. A guide surface 17 a that is inclined so as to be displaced inward as it is separated from the insertion portion 16 is formed on the outer peripheral portion of the opening / closing portion 17.

  The valve 15 is attached by inserting the inserted portion 16 into the other end portion of the coil spring 14 so as to be fitted inside, and the flange portion 17 a is pressed against the other end of the coil spring 14.

  When an external force is not applied to the coil spring 14 in a state where the coil spring 14 is disposed inside the base portion 10, the coil spring 14 is extended and substantially the entire valve 15 is inserted into the insertion space 7 b of the joint 2 to open and close the opening / closing portion 17. Is pressed against the inner flange portion 8 to close the delivery port 9 (see FIG. 3).

  The nozzle 4 has a main body 18 having an outer peripheral surface formed in a spherical shape, and a flow space 18a is formed inside the main body 18 (see FIGS. 2 and 3). The main body 18 is formed with a discharge port 18b communicating with the flow space 18a.

  The nozzle 4 is press-fitted into the holding portion 11 of the nozzle holder 3 so as to be fitted into the nozzle holder 3, and can rotate in any direction with respect to the holding portion 11.

  One end of a supply pipe 19 to which cleaning liquid is supplied is connected to the joint 2, and the other end of the supply pipe 19 is connected to a supply tank (not shown) in which the cleaning liquid is stored.

  In the cleaning apparatus 1, for example, the collar 20 is attached to a part of the nozzle holder 3 in an outer fitting shape, and the collar 20 is attached to the vehicle body 100 or the bumper by being pressed by a mounting plate spring 21 (see FIG. 1). . When attached to the vehicle body 100 or the bumper, at least a part of the nozzle 4 protrudes outward from an insertion hole 100a formed in the vehicle body 100 or the bumper. A nozzle cover 22 is attached to the nozzle 4.

  In the cleaning apparatus 1 configured as described above, when the cleaning liquid 300 is supplied from the supply tank to the flow path 2a of the joint 2 via the supply pipe 19, the pressure of the cleaning liquid 300 is applied to the opening / closing part 17 of the valve 15. The

  When the cleaning liquid 300 is supplied to the flow path 2a and pressure is applied to the opening / closing portion 17, the supplied cleaning liquid 300 increases the internal pressure, the coil spring 14 is compressed, the valve 15 is moved together with the coil spring 14, and the delivery port 9 is opened. (See FIG. 5). When the valve 15 is moved and the delivery port 9 is opened, a first flow path 7 c is formed between the guide surface 17 b of the valve 15 and the guide surface 7 a of the joint 2.

  When the delivery port 9 is opened, the cleaning liquid 300 that has passed through the delivery port 9 flows through the first flow path 7c, is guided to the guide surface 15a of the valve 15, and is also guided to the guide surface 7a of the joint 2 to be coil springs. 14 is flowed through the second flow path 10a existing on the outer peripheral side. The cleaning liquid 300 having flowed through the second flow path 10a passes through the communication holes 12a, 12a,..., Flows into the flow space 18a of the nozzle 4, and flows from the discharge port 18b toward the cover 201 of the vehicular lamp 200. The cover is washed by the jetted cleaning liquid 300.

  As described above, when the supply port 9 is opened and the cleaning liquid 300 flows through the first flow path 7c, the flow area of the first flow path 7c is smaller than that of the second flow path 10a. The flow rate of the cleaning liquid 300 is fast, the compressed state of the coil spring 14 is maintained, the valve 15 is held at a predetermined position, and the state where the delivery port 9 is opened is maintained.

  Further, when the cleaning liquid 300 flows through the second flow path 10a via the first flow path 7c, the flow area of the second flow path 10a is larger than that of the first flow path 7c. Therefore, a sufficient pressure and amount of the cleaning liquid 300 sprayed from the discharge port 18b of the nozzle 4 are ensured.

  At this time, in the cleaning device 1, since the valve 15 is held at the boundary position between the first flow path 7c and the second flow path 10a, the chattering that is the vertical movement of the valve 15 hardly occurs, and the first flow A stable flow area of the passage 7c can be secured, and a stable flow area of the second flow passage 10a can be secured to secure a sufficient injection pressure and injection amount of the cleaning liquid 300 injected from the nozzle 4. it can.

  In addition, since the guide surface 7a and the guide surface 17b are located at the boundary between the first flow path 7c and the second flow path 10a, the flow path between the first flow path 7c and the second flow path 10a. The change in the area has been moderated. Accordingly, since the change in flow velocity when the cleaning liquid 300 flows from the first flow path 7c to the second flow path 10a becomes gentle, the valve 5 is held in a stable state at a predetermined position when the cleaning liquid 300 flows. can do.

  When the supply of the cleaning liquid 300 from the supply tank is stopped, the internal pressure is reduced, the coil spring 14 is extended, the valve 15 is moved together with the coil spring 14, the opening / closing portion 17 is pressed against the inner flange portion 8, and the delivery port 9 is closed. Then, the ejection of the cleaning liquid 300 from the nozzle 4 is stopped.

  As described above, in the cleaning device 1, the flow area of the first flow path 7 c formed when the delivery port 9 is opened is the second flow path 10 a formed outside the coil spring 14. Is larger than the flow area.

  Therefore, a high fluid pressure of the cleaning liquid 300 in the first flow path 7c is secured and the state where the delivery port 9 is opened is maintained, and the flow resistance with respect to the cleaning liquid 300 in the second flow path 10a is small, and the jet 4 is injected from the nozzle 4. A sufficient spray pressure and spray amount of the cleaning liquid 300 to be performed can be ensured, and the flow state of the cleaning liquid 300 can be stabilized.

  Further, the flow area of the first flow path 7c is made smaller than the flow area of the second flow path 10a by the thickness of the second annular portion 7 of the joint 2.

  Therefore, the flow areas of the first flow path 7c and the second flow path 10a can be made different without increasing the number of parts, and the flow state of the cleaning liquid 300 is stabilized while ensuring the simplification of the structure. Can be achieved.

  Furthermore, a guide surface 7a is formed in the joint 2 so as to be inclined toward the outer peripheral side in the direction of flow of the cleaning liquid 300 and guide the cleaning liquid 300 from the first flow path 7c to the second flow path 10a.

  Accordingly, the cleaning liquid 300 can be reliably flowed in the second flow path 10a while ensuring the simplification of the structure of the cleaning device 1 without increasing the number of parts, and the guide surface 7a is formed in an inclined shape. Therefore, vortices are hardly generated in the cleaning liquid 300 in the vicinity of the guide surface 7a, and a good flow state of the cleaning liquid 300 can be ensured.

  In the above, an example in which the inclined guide surface 7a is formed at the distal end portion of the joint 2 is shown. However, the distal end portion of the joint 2 is not necessarily formed in an inclined shape. The second annular portion 7 may be formed in a shape having a certain thickness.

  Furthermore, since the guide surface 17b for guiding the cleaning liquid 300 to the second flow path 10a is formed on the valve 15, the cleaning liquid 300 is secured after ensuring the simplification of the structure of the cleaning apparatus 1 without increasing the number of parts. Can be reliably flowed in the second flow path 10a.

  In the cleaning device 1, the cleaning liquid 300 flows through the second flow path 10 a formed on the outer peripheral side of the coil spring 14 and is ejected from the discharge port 18 b of the nozzle 4.

  Accordingly, since no resistance force is applied from the coil spring 14 to the cleaning liquid 300, pressure loss is unlikely to occur, and a high spray pressure of the cleaning liquid 300 sprayed from the nozzle 4 can be ensured.

  The shapes and structures of the respective parts shown in the best mode for carrying out the invention described above are merely examples of the embodiments performed in practicing the present invention. The range should not be interpreted in a limited way.

  DESCRIPTION OF SYMBOLS 1 ... Cleaning apparatus, 2 ... Joint, 2a ... Flow path, 3 ... Nozzle holder, 4 ... Nozzle, 7a ... Guide surface, 7c ... 1st flow path, 9 ... Delivery port, 10a ... 2nd flow path, 12a ... Communication hole, 14 ... Coil spring, 15 ... Valve, 17b ... Guide surface, 18b ... Discharge port, 200 ... Vehicle lamp, 300 ... Cleaning liquid

Claims (4)

A joint having a flow path through which the cleaning liquid supplied from the supply tank flows and a delivery port for sending out the cleaning liquid;
A nozzle holder to which the joint is connected and in which the cleaning liquid fed from the joint outlet is flowed;
A coil spring disposed inside the nozzle holder and stretched in the flow direction of the cleaning liquid;
A nozzle having a discharge port for discharging the cleaning liquid to the outside and held by the nozzle holder;
A valve attached to the coil spring and moved together with the coil spring to open and close the joint outlet;
When the valve is moved and the delivery port is opened, a first flow path is formed on the outside of the valve through which the cleaning liquid flows,
Inside the nozzle holder, a second flow path is formed which is continuous with the first flow path and allows the cleaning liquid to flow toward the nozzle.
The vehicle cleaning apparatus, wherein a flow area of the cleaning liquid in the second flow path is larger than a flow area of the first flow path. The first flow path is formed inside the joint;
The vehicle washing apparatus according to claim 1, wherein the flow areas of the first flow path and the second flow path are made different depending on the thickness of the joint. The guide surface is formed on the joint so as to incline toward an outer peripheral side in the flow direction of the cleaning liquid and guide the cleaning liquid from the first flow path to the second flow path. Or the washing | cleaning apparatus for vehicles of Claim 2. 4. The vehicle according to claim 1, wherein a guide surface that guides the cleaning liquid from the first flow path to the second flow path is formed on the valve. 5. Cleaning device.

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