JPH0786039B2 - Refueling nozzle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fueling nozzle suitable for use in a fueling device having an automatic full tank fueling function.

[Conventional technology]

Conventionally, as a refueling device with an automatic full tank refueling function,
A liquid detection sensor that detects the liquid surface and emits a signal is provided in the discharge pipe of the oil supply nozzle, and the control device repeats rotation and stop of the pump drive motor based on the signal output from the liquid detection sensor to supply additional oil. It is known that the fuel tanks are automatically refilled with accurate refueling.
The refueling nozzle used in this type of refueling device may be one in which the discharge pipe is inserted into the refueling port of the fuel tank and the operating lever is held in the open state, and the determination of full tank is based on the signal from the liquid sensor. It is performed by the control device.

That is, in FIG. 9, the pump motor is stopped when the liquid sensor is turned ON at t ₀ seconds after the refueling is started, and the liquid sensor is stopped after a predetermined bubble disappearance waiting time t ₁ (for example, 5 seconds). ON
Is determined. When it is turned off, it is assumed that the bubbles have disappeared, the pump motor is driven for t ₂ seconds (for example, 100 msec), and after a predetermined waiting time t ₃ seconds (for example, 2 seconds), it is judged again whether or not the liquid sensor is on. To do. If it turns off, it is assumed that the bubbles have disappeared, and the pump motor is driven for t ₄ (for example, 50 msec), and the liquid sensor turns on after a predetermined waiting time t ₃ illness.
It is known that it is determined whether or not, and if it is ON, it is determined that it is finally filled with full tank.

[Problems to be solved by the invention]

Therefore, the above-mentioned conventional technique has the following problems. That is, in the case of automatic full tank refueling, the operation is performed while the operating lever of the refueling nozzle is held in the open state, but in the open state, as shown in FIG. 9, refueling suitable for ordinary vehicles is performed. There is a fully open position state and a half open position state for supplying fuel suitable for a vehicle with a small fuel tank such as a motorcycle as shown in FIG. 10, and the flow rate of the oil liquid varies depending on the valve open state.

For this reason, even if the predetermined bubble disappearance waiting time t ₁ and the predetermined waiting time t ₃ are set as the determination factors for fullness, the overshoot time differs depending on the flow velocity, so that each waiting time t ₁ , t
Substantial waiting time out of ₃ will change. That is,
In FIG. 9, the substantial waiting time is t ₁ ′, t ₃ ′, whereas in FIG. 10, the substantial waiting time is t ₁ ″, t ₃ ″.
As a result, the waiting time as a determination factor changes depending on the valve opening state of the fueling nozzle, and there is a possibility that an accurate full tank determination cannot be performed.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to perform an additional full refueling by performing additional refueling after a full tank determination at a constant stable flow rate regardless of the valve open state. An object is to provide a refueling nozzle that is made possible.

[Means for solving problems]

The present invention configured to solve the above-mentioned problems,
A nozzle body having an oil passage inside and a discharge pipe communicating with the oil passage on the tip side, and a valve that is attached to and detached from a valve seat provided in the nozzle body to open and close the oil passage. A valve shaft slidably provided on the body and the nozzle body and provided with the valve body on the tip side, and stretched between the valve shaft and the nozzle body, and the valve body is always closed. A biasing spring, an operating lever that opens the valve body by slidingly displacing the valve shaft against the spring force of the spring, and a valve hole that is formed in the valve shaft. Also has an inflow port that is located on the upstream side and opens to the oil passage, and has a small flow passage that is located on the downstream side of the valve body and that has an outflow port that opens to the oil passage; and a shaft on the valve shaft. Has a valve portion that is slidably inserted in a predetermined direction and that normally shuts off the inlet and outlet of the small flow path. A sliding rod that is slidably displaced integrally with the operating lever by the operating lever, and when operating the operating lever to open the valve body, the sliding rod and the valve shaft are engaged to It consists of an automatic valve closing mechanism that releases the engagement between the sliding rod and the valve shaft when the valve is opened.When the valve body is closed, only the valve shaft is displaced, and the small flow that has been closed by the sliding rod. It is configured so as to circulate between the inflow port and the outflow port of the passage.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an overall configuration diagram of an oil supply device including an oil supply nozzle 10 of this embodiment described later. In FIG.
1 is a fixed type oil supply device main body, and the main body 1 is a lower case 2
And the upper case 3 are generally configured. A pipe 4 having one end connected to an underground tank (not shown) is provided in the lower case 2, and a pump 6 driven by a motor 5 and a flow meter 7 having a pulse transmitter 7A are provided in the middle of the pipe 4. A normally open solenoid valve 8 is provided, a hose 9 is connected to the other end of the pipe 4, and a tip of the hose 9 is provided with a fueling nozzle 10 described in detail in FIGS. 2 to 4. ing. On the other hand, the lower case 2 is provided with a nozzle housing portion 11 for housing the fueling nozzle 10 except when the fueling operation is performed, and the nozzle housing portion 11 is provided with a nozzle switch 12 which is opened and closed by hanging the fueling nozzle 10 on and off. It is provided.

Next, the upper case 3 is provided with an indicator 13 for displaying the amount of refueling, the amount of money, and the unit price. In the figure, 14 is a control device provided in the upper case 3, and in the case of this embodiment, the control device 14
Is a function to display the amount of oil supply on the display 13 by the flow rate signal from the pulse transmitter 7A, and when the nozzle 10 is removed and the nozzle switch 12 is closed, the motor 5 is started and the oil supply nozzle 10 is turned on. Function to stop the motor 5 when the nozzle switch 12 is closed, and the solenoid valve 8 when the liquid level is detected by the liquid detection sensor 26 (described later) provided in the refueling nozzle 10.
After the nozzle switch 12 is opened and the nozzle switch 12 is opened, the solenoid valve 8 is held in the open state again.

Here, in the case of the present embodiment, the solenoid valve 8 constitutes an oil supply stop mechanism which is closed when the liquid detection sensor 26 detects the liquid surface. The refueling stop mechanism is not limited to the solenoid valve 8 and may be the pump 6 driven and stopped by the motor 5, and in this case, it is not necessary to provide the solenoid valve.

Next, FIGS. 2 to 6 show a specific structure of the oil supply nozzle 10. In the figure, reference numeral 21 denotes a nozzle body which is formed in a straight rod shape as a whole, an oil passage 22 is provided in the nozzle body 21, and the tip end side of the nozzle body 21 communicates with the oil passage 22. A discharge pipe 23 is provided so as to project coaxially with the nozzle body 21 via a connection port member 70 described later.

A valve seat 24 is provided in the nozzle body 21 and is located in the oil passage 22 for opening and closing the oil passage 22, and a main valve body 26 constituting a valve body 25 is seated on and off the valve seat 24. It is possible. Here, a valve shaft which will be described later and is located at the center of the main valve body 26
An insertion hole 27 through which the 33 is inserted is formed, and a concave portion 28 and a tapered convex portion 29, which are concentric with the insertion hole 27, are formed on both surface sides thereof toward the upstream and the downstream of the oil passage 22, respectively. Micro passages 30, 30 that open to the concave portion 28 and the convex portion 29 are bored inside.

On the other hand, the nozzle main body 21 is provided with a shaft support portion 31 projecting from the oil passage 22 and having a shaft insertion hole 31A inside, and a sleeve 32 is fitted in the shaft insertion hole 31A. Have been combined.

Reference numeral 33 denotes a valve shaft provided on the shaft supporting portion 31 via the sleeve 32 so as to be capable of advancing in the directions A and A '. Body 25, main valve body 26
A sub valve body 34 having a tapered shape is formed integrally with the recess 28 on the side thereof. Further, a rod insertion hole 35 into which a tip end side of a sliding rod 41, which will be described later, is inserted is bored in the rear end side of the valve shaft 33 in the axial direction, and a notch portion 36 opening to the rod insertion hole 35 is formed. Has been done. Then, the sub valve body 34 of the valve shaft 33
The tip end side is inserted into the insertion hole 27 of the main valve body 26, and the adjustment nut 37 for adjusting the valve opening degree of the sub valve body 34 is attached to the tip end.

38 is a small channel provided in the valve shaft 33, and the small channel 38 is the valve shaft 33.
Is formed in the radial direction of the valve body 25 and communicates with the oil passage 22 upstream of the valve body 25 and the rod insertion hole 35, and a hole having a smaller diameter than the rod insertion hole 35. axis
33, an oil passage 38B formed in the axial direction, and an outlet 38C located at the tip end side of the oil passage 38B and opening to the oil passage 22 downstream of the valve body 25. The valve seat portion 39 is formed in the middle of the small flow path 38 by forming the valve having a smaller diameter than the rod insertion hole 35.

The valve shaft 33 configured as described above is biased in the direction of arrow A'by the spring force of the compression spring 40 stretched between the sleeve 32 and the sub valve body 34, and the sub valve body 34 is the main valve 26
Of the valve shaft 33
The main valve body 26 is seated on the valve seat 24.

Reference numeral 41 denotes a sliding rod inserted into the rod insertion hole 35 of the valve shaft 33. The sliding rod 41 has a small diameter portion 41A formed to have a diameter smaller than that of the rod insertion hole 35, and is formed by baking on the tip of the small diameter portion 41A. And the rubber valve portion 41B which is seated on and off the valve seat portion 39.
An intermediate portion 41C axially formed on the other end side of the upper diameter portion 41A and slidingly contacting the inner peripheral surface of the rod insertion hole 35, and an axially formed end portion of the intermediate portion 41C, the sleeve 32 And a large-diameter portion 41D that is in sliding contact with the inner peripheral surface of the intermediate portion 41C, an engaging groove 42 corresponding to the cutout portion 36 is formed in the middle outer periphery of the intermediate portion 41C, and the large-diameter portion 41D will be described later. One end side of contact lever 49
A lever engagement hole 43 with which 9B is engaged is formed.

A second positioning groove formed on the rod insertion hole 35 side of the valve shaft 33 engages a positioning pin 45 implanted in the sleeve 32 with a first positioning groove 44 formed on the outer periphery of the valve shaft 33. 46
Positioning pin 47 planted in the intermediate portion 41C of the sliding rod 41
Engaging with the notch 36 of the valve shaft 33 and the sliding rod.
The engagement grooves 42 of 41 are correspondingly positioned.

Next, 48 is a lever guard attached to the lower surface of the intermediate portion of the nozzle body 21, and 49 is a bent portion located inside the lever guard 48.
49A is shown in the upper part of the rear part of the lever guard 48 through the shaft 50 as shown by the arrow B,
An L-shaped connecting lever rotatably mounted in the B'direction. One end side 49B of the connecting lever 49 has a lever engaging hole of the sliding rod 41 through an opening 51 formed in the nozzle body 21. 43
Inside, the multi-end side 49C is inside the lever card 48, the front side,
That is, it extends toward the tip of the nozzle body 21.

52 is located in the shaft insertion hole 31A and is located in the large diameter portion 41D of the sliding rod 41.
A weak spring stretched between the shaft support portion 31 and the shaft support portion 31.
The sliding rod 41 is always brought into contact with the one end side 49B of the communication lever 49 fitted in the lever engagement hole 43 by the spring force of so that the communication lever 49 and the sliding rod 41 are kept interlocked. At the same time, a counterclockwise force about the shaft 50 acts on the connecting lever 49, and the other end 4C of the connecting lever 49 is about to rotate in the direction of the arrow B '.

On the other hand, 53 is the valve shaft 33 against the spring force of the compression spring 40.
The operating lever 53 is located inside the lever guard 48, one end side 53A is pivotally mounted above the lever guard 48 via a shaft 54, and the other end side 53B is an arrow C. ,
It can be rotated in the C'direction. The multi-end side 49C of the communication lever 49 slidably contacts the intermediate portion 53C of the operation lever 53, and the operation lever 53 is rotated in the arrow C'direction to maintain the interlocking structure. Has become.
Then, the other end side 53B of the operation lever 53 is locked to the half-opening hooking portion 55 or the full-opening hooking portion 56 of the valve body 25 provided in the lever guard 48, so that the operation lever 53 is centered on the shaft 54. It can be held at the predetermined rotation position.

Next, reference numeral 57 in FIG. 3 denotes an automatic valve closing mechanism for automatically closing the valve body 25 when the liquid level in the tank reaches a predetermined liquid level. Reference numeral 58 denotes a diaphragm that constitutes the automatic valve closing mechanism 57. The diaphragm 58 is arranged on the side surface side of the rod support portion 31, and the peripheral edge portion thereof is fixed to the nozzle body 21. 59
Is a cap provided on the nozzle body 21 outside the diaphragm 58, and a negative pressure chamber 60 is provided between the cap 59 and the diaphragm 58. Reference numeral 61 is a receiving plate located on the other side of the negative pressure chamber 60 and fixed to the central portion of the diaphragm 58. The receiving plate 61 is formed in a U shape as shown in FIG. 4, and its opposing pieces 61A and 61A. Long holes 62, 62 are formed in the. 63 and 63 are a pair of rod-shaped rollers whose both axial ends are slidably fitted in the respective long holes 62 and 62, and the rod-shaped rollers 63 and 63 extend from the notch 36 of the valve shaft 33 to the sliding rod 41. The engagement groove 42 is engaged with the engagement groove 42 in a disengageable manner. Reference numeral 64 denotes a spring which is located inside the negative pressure chamber 60 and is stretched between a spring receiver 65 provided on the diaphragm 58 side and a cap 59. The spring 64 is provided with each rod-shaped roller 63 via the diaphragm 58 and the receiving plate 61. Is urged to fit into the engaging groove 42 of the sliding rod 41. Thus, the automatic valve closing mechanism 57 of this embodiment is roughly composed of the diaphragm 58, the cap 59, the receiving plate 61, the rod roller 63 and the spring 64.

Next, 66 is a sensor unit provided on the upper part of the nozzle body 21 for detecting displacement of the diaphragm 58 and performing full tank control of refueling. The sensor unit 66 is a photocoupler having a light emitting element and a light receiving element. 67 and a slit 68 which is provided upright on the receiving plate 61 as shown in FIG. 4 and which blocks the light emitting element and the light receiving element from each other in accordance with the displacement of the diaphragm 58. It is connected to a control device 14 provided in the fuel supply device main body 1.

Further, 70 is a connection port member located downstream of the valve seat 24 and fastened to the tip end side of the nozzle body 21 by a fastening fitting 71, and the discharge pipe 23 is screwed to the connection port member 70. Has been done. Further, the main valve body 26 is attached to the valve support portion 70A of the connection port member 70.
Auxiliary valve 72 is slidably inserted in opposition to and is biased so that the auxiliary valve 72 is always seated on the valve seat 24 by a spring 73 stretched between the auxiliary valve 72 and the connection port member 70. Has been done.

Further, 74 is an atmosphere communication port as a bubble detection sensor provided at the cylinder tip of the discharge pipe 23, and the atmosphere communication port 74 is formed in the negative pressure pipe 75 and the nozzle body 21 arranged in the discharge pipe 23. The negative pressure chamber 60 of the automatic valve closing mechanism 57 communicates with each other via the ventilation path 76 in order. On the other hand, reference numerals 77 and 77 denote intake passages provided in the valve seat 24. One end of each intake passage 77 communicates with the ventilation passage 76 between the negative pressure pipe 75 and the negative pressure chamber 60, and the other end thereof is a valve seat. It communicates with an annular passage 78 between the 24 and the auxiliary valve 72.

Reference numeral 79 is a liquid detection sensor located at the tip of the discharge pipe 23 and provided on the tip side of the atmosphere communication port 74. The liquid detection sensor 79 is a photoelectric liquid detection sensor including a light emitting element and a light receiving element. Is used, and is connected to the control device 14 in the refueling device main body 1 via a signal line 80. The liquid detection sensor 79 is not limited to the photoelectric liquid detection sensor, and an ultrasonic liquid detection sensor or a capacitance type liquid detection sensor may be used.

Further, reference numeral 81 in the drawing denotes an opening 82 provided at the rear end of the nozzle body 21.
Shows a plug that closes. Reference numeral 83 is a tubular connecting member that is connected to the oil passage 22 and has a proximal end side screwed into an opening 84 formed at an axially intermediate position of the nozzle body 21, and 85 is rotatably connected to the distal end side of the tubular connecting member 83. The joint member 85 is connected to the hose 9.

The refueling nozzle 10 according to the present embodiment is configured as described above, and its operation will be described next.

First, the refueling nozzle 10 in which the discharge pipe 23 is inserted into the refueling port of the fuel tank is in the state of FIGS. 2 and 3 as a whole before the operation lever 53 is operated. That is, the negative pressure chamber 60 of the automatic valve closing mechanism 57 includes a ventilation passage 76, a negative pressure pipe 75, and an atmosphere communication hole 74.
Since it is in the atmospheric pressure state by communicating with the outside through the springs sequentially, the receiving plate 61 together with the diaphragm 58 is also moved to the third position by the spring 64.
Pushed downward in the figure, the rod-shaped roller 63 fits into the notch 36 of the valve shaft 33 and the engagement groove 42 of the sliding rod 41, and the valve shaft 33 and the sliding rod 41 are indicated by arrows A, It is designed to slide integrally in the A'direction. The main valve body 26 is seated on the valve seat 24 via the valve shaft 33 by the spring force of the compression spring 40, and the auxiliary valve body 34 is seated on the main valve body 26.

The sliding rod 41 inserted into the valve shaft 33 is pushed toward the valve body 25 by the spring force of the spring 52, and the valve portion at the tip of the sliding rod 41 is pushed.
41B is seated on the valve seat portion 39 in the valve shaft 33 to block between the inflow port 38A and the outflow port 38C of the small flow passage 38, the oil passage 22 upstream of the valve body 25 and the downstream side. An annular passage that is the oil passage 22
78 is completely blocked.

Next, the operating lever 53 is pulled up in the direction of arrow C to refuel, and the sliding rod 41 is retracted via the connecting lever 49 against the spring force of the spring 52. As a result, the valve shaft 33, which is engaged with the sliding rod 41 via the rod-shaped roller 63, also slides in the direction of arrow A against the spring force of the compression spring 40.
34 is separated from the main valve body 26 to open the minute passage 30, and a small amount of oil liquid flows from the upstream side to the annular passage 78 side. When the operating lever 53 is further pulled up from this state and locked to the half-opening latching part 55 or the full-opening locking part 56, the adjusting nut 37 causes the main valve body 26 to move.
The main valve body 26 separates from the valve seat 24 by abutting against, and the oil passage 22 is largely opened to flow a large amount of oil liquid, and the auxiliary valve 72 is opened by hydraulic pressure (see FIG. 5). At this time, the auxiliary valve 72
The sub valve body 34 is separated from the main valve body 26, and a small flow rate of the oil liquid flows through the valve passage 30 to open the valve.

Then, when the valve body 25 is opened and the auxiliary valve 72 is opened, the annular passage 78 serves as a throttle passage, and a negative pressure is generated in the intake passage 77 by the venturi action, so that the air in the negative pressure chamber 60 is closed. Try to suck. However, since the atmosphere circulation port 74 communicates with the atmosphere, the inside of the negative pressure chamber 60 does not become negative pressure.

When a predetermined amount of liquid is supplied in the fuel tank,
Since the atmosphere communication port 74 is blocked by the liquid or bubbles generated during refueling and the atmosphere cannot be sucked, the negative pressure chamber 60
Aspirate the air inside. As a result, the inside of the negative pressure chamber 60 becomes negative pressure, and the diaphragm 58 is displaced upward in FIG. 5 against the spring 64. As a result, the receiving plate 61 is also displaced upward, and the rod-shaped roller 63 causes the sliding rod 63 to move. It disengages from the engagement groove 42 of 41. Since the sliding of the sliding rod 41 is restricted by the operating lever 53 via the communication lever 49, only the valve shaft 33 is a compression spring.
The rod-shaped roller 63 slides in the elongated hole 62 by the spring force of 40, and slides in the direction of the arrow A ', so that the valve body 25 is seated on the valve seat 24. As a result, the valve shaft 33 and the sliding rod 41 are separated from each other in the axial direction, and the valve portion 41B of the sliding rod 41 causes the valve seat portion 3 in the valve shaft 33 to move.
The inlet 38A and the outlet 38C of the small flow path 38 communicate with each other by separating from 9 (see FIG. 6). Thus, even after the automatic valve closing mechanism 57 is actuated, the operation lever 53 keeps the half-open locking portion 55 or the full-open locking portion.
Regardless of which one of 56 is engaged, additional refueling control can be performed by the control device 14 at a constant small flow rate based on the signal output from the liquid detection sensor 79, and accurate full tank refueling can be performed. Can be done. Then, after confirming that the full tank refueling has been completed, operate the operation lever 53
When removed from 55 (56), the sliding force is generated by the spring force of spring 52.
41 slides toward the valve body 25, the valve portion 41B is seated on the valve seat portion 39, and the inlet 38A and outlet 38C of the small flow path 38 are blocked.

Further, when the refueling nozzle 10 is pulled up from the fuel tank, the inside of the negative pressure chamber 60 is brought to the atmospheric pressure state, and the rod-shaped roller 63 is fitted into the engaging groove 42 of the sliding rod 41 by the compression spring 64. And the initial state shown in FIG. 3 is restored. Finally, when the fueling nozzle 10 is hung on the nozzle housing portion 11, the nozzle switch 12 is closed, the motor 5 is stopped, and a series of fueling operations are completed.

Next, FIGS. 7 and 8 show a sliding rod 91 according to a modification of the above-described embodiment. The feature of the sliding rod 91 is that the small diameter portion 91A on the axial tip side is the inlet 3 of the small flow path 38.
The outer peripheral surface of the small diameter portion 91A is formed so as to be in sliding contact with the inner peripheral surface of the rod insertion hole 35 to form a valve portion that closes 8A, and the valve shaft 33 is closed in the valve closing direction in the small diameter portion 91A. This is because a small-diameter communication hole 92 having an L shape, which communicates with the inflow port 38A and allows the oil liquid in the oil passage 22 to flow into the oil passage 38B side when the sliding displacement occurs.

The sliding rod 91 having the above-described structure is located at the position shown in FIG.
91A is in a state in which the inlet 38A of the small channel 38 is closed. On the other hand, when the automatic valve closing mechanism 57 operates and the valve shaft 33 slides and displaces in the direction in which the valve body 25 closes, as shown in FIG. The communication hole 92 of 91 communicates with each other, so that a small amount of additional oil can be additionally supplied.

The case where the refueling nozzle 10 according to the present embodiment is applied to a fixed weighing machine has been described as an example, but the refueling nozzle 10 can also be used for a suspension weighing machine suspended from a high place of a building. Further, in the embodiment, the lever guard 48 is provided with a half-open locking portion 55 for locking the operation lever 53 and a full-open locking member so that the opening degree of the valve body 25 can be switched between two stages of half-open and full-open. Stop 56
However, it is also possible to provide three or more locking portions so that the opening degree of the valve body 25 can be switched among a plurality of stages.

Furthermore, the full tank determination method based on the signal output from the liquid detection sensor 79 and the additional lubrication control method related thereto are described in the ninth aspect.
Not limited to those shown in FIG. 10 and FIG. 10, for example, after the signal of the liquid detection sensor 79 disappears, the time until the signal of the liquid detection sensor 79 is input next time the pump 6 is driven becomes a predetermined time or less. A method of determining whether or not it may be used.

〔The invention's effect〕

The refueling nozzle according to the present invention is as described in detail above, and when the refueling is performed after the automatic valve closing mechanism is operated, the operation lever is in the full-open position or the half-open position, and the small flow rate is maintained. Since it is possible to supply a small amount of fuel by a certain amount depending on the road, it is possible to accurately perform full tank fueling.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is an overall configuration diagram of an oil supply device using an oil supply nozzle according to the embodiment, FIG. 2 is a vertical sectional view of the oil supply nozzle, and FIG. Is a cross-sectional view of the fueling nozzle, FIG. 4 is a perspective view in which a part of the receiving plate, the rod-shaped roller, the photocoupler, and the slit are broken, and FIG. 5 is a cross-sectional view of the fueling nozzle with the valve body opened FIG. 6 is a cross-sectional view of the oil supply nozzle in a state where the valve body is closed and the small flow path is in communication, FIGS. 7 and 8 show a modification of the embodiment, and FIG. 7 is a valve body. FIG. 8 is a vertical sectional view showing the valve shaft and the sliding rod, and FIG. 8 is a vertical sectional view showing the valve shaft, the valve shaft and the sliding rod in a state where the sub-valve is closed and the small flow path is in communication. FIG. 9 and FIG. 10 show the prior art, FIG. 9 is a time chart in the case of additional oil supply with the nozzle fully open, and FIG. 10 is additional oil supply with the nozzle half open. It is a time chart of a case. 21 …… Nozzle body, 22 …… Oil passage, 23 …… Discharge pipe,
24 …… Valve seat, 25 …… Valve disc, 33 …… Valve shaft, 38 …… Small passage,
38A ... inlet, 38C ... outlet, 40 ... compression spring, 41,9
1 …… Sliding rod, 41B …… Valve part, 53 …… Operating lever, 57
...... Automatic valve closing mechanism.

Claims (1)

[Claims] 1. A nozzle main body having an oil passage therein and a discharge pipe communicating with the oil passage on the tip side, and a valve seat provided in the nozzle main body for opening and closing the oil passage. A valve body slidably attached to the nozzle body, a valve shaft slidably provided on the nozzle body, the valve body having the valve body provided on the tip side, and the valve body stretched between the valve shaft and the nozzle body. A spring that normally urges the valve element in the valve closing direction, an operation lever that opens the valve element by slidingly displacing the valve shaft against the spring force of the spring, and a hole that is provided in the valve shaft. A small flow path having an inflow port located upstream of the valve body and opening to the oil passage, and having a flow outlet located downstream of the valve body and opening to the oil passage, A valve portion that is slidably inserted in the valve shaft in the axial direction and that normally shuts off the inlet and outlet of the small flow path, And a sliding rod that is slidably displaced integrally with the operating lever by the operating lever, and the sliding rod and the valve shaft are engaged when the operating lever is operated to open the valve body. When the valve body is closed, it consists of an automatic valve closing mechanism that releases the engagement between the sliding rod and the valve shaft.
An oil supply nozzle configured to displace only the valve shaft when the valve body is closed so that the inlet and the outlet of the small passage closed by the sliding rod are communicated with each other.