Hydraulic fluid reservoir device

Abstract

To develop a new actuation liquid reserve device freely movable like a cart, executing one or both works of a collection of waste oil from and a supply of new oil to an engine of a vehicle or the like rationally, allowing a connection with an external installation tank of the waste oil and the new oil at a machine in the device and self-completing oil exchange work.SOLUTION: An actuation liquid reserve device comprises: a set of two three-way valves 32a and 32b switching a duct connection state of a new oil tank suction pipe 33 and a new oil tank outlet pipe 36 as ducts in the tank and an external new oil tank suction pipe 34 and a device new oil outlet pipe 35 as ducts out of the tank; and a new oil pump 3p moving the actuation liquid between the two three-way valves 32a and 32b, and it switches a flow direction of the actuation liquid by switching the three-way valves 32a and 32b.SELECTED DRAWING: Figure 5-1

Description

[Technical Field]

[0001] The present invention relates to a hydraulic fluid reservoir device that receives and discharges hydraulic fluid to be treated, with a typical example being an oil change device for changing engine oil for a vehicle. [Background technology]

[0002] As part of automobile maintenance, engine oil changes involve two tasks: removing the old engine oil from the engine when it is due for replacement, and filling the engine with new oil. Generally, small vehicles such as passenger cars have an oil capacity of just a few liters, while large vehicles such as trucks have a larger capacity of around 20 to 30 liters.

[0003] In addition, transportation and bus operators of In older factories, including those with drums and pails, can Therefore, in many cases, the oil is collected in a jug using a manual pump or air and carried to the vehicle T, but when changing the oil in a large truck with a large oil capacity, multiple trips are required.

[0004] For this reason, as shown in FIG. 16, in a maintenance factory 100 for vehicles T, particularly trucks, a device for disposing of waste oil and a device for providing new oil are installed in each of the multiple work lanes 100L1 to 100L7, in order to reduce the workload of maintenance workers. That is, first, in most cases, a method for disposing of waste oil involves moving a drain cart 101 with casters (equipped with a waste oil tank 101T with a maximum capacity of about 80 liters) under the engine of a lifted-up vehicle T, removing the drain cock, and temporarily storing the waste oil L0 that naturally falls into the waste oil tank 101T. Then, when the waste oil tank 101T of the drain cart 101 is nearly full, the drain cart 101 is moved to the nearest discharge pump 102 among the discharge pumps 102 installed at various locations in the maintenance workshop 100, and the suction hose 103 of the discharge pump 102 is connected to the waste oil tank 101T with a coupler to suck up the waste oil L0, and the waste oil is then pumped through a waste oil pipe 104D and pumped to a final waste oil tank 105 with a capacity of, for example, about 500 to 2000 liters, which is installed away from the work lanes 100L1 to 100L7. In this system,

[0005] Another method is to connect, via couplers, suction hoses 103 attached to the ends of waste oil pipes 104D installed at various locations in the maintenance workshop 100 to the drain carts 101 of each work lane 100L1 to 100L7, and the waste oil L0 is first sucked into a vacuum tank (not shown) installed in a corner of the maintenance workshop 100 away from the work lanes 100L1 to 100L7, and then pressure-sucked into a final waste oil tank 105 via piping. This is known as a centralized vacuum line method.

[0006] In a repair shop 100 that implements these conventional methods, it is essential to have multiple drain carts 101 in each work lane 100L1 to 100L7 that catch the waste oil L0 that is naturally discharged from the drain cock of the engine of the vehicle T, as well as waste oil piping 104D and multiple discharge pumps 102 that suck the waste oil L0 from these drain carts 101 and pump it through piping to a final waste oil tank 105. In addition, the final waste oil tank 105 is generally provided with a liquid level sensor 105S to prevent overflow, and a system equipped with an alarm panel 105B that electrically receives a full oil alarm and forcibly stops the discharge pump 102 is generally adopted.

[0007] On the other hand, a common method for supplying new oil is to pump new oil L1 from a new oil tank 106T (500 to 1000 liters) in an oil storage tank 106 located away from the work lanes 100L1 to 100L7 through new oil piping 104N using a high-pressure pump 107 to the work lanes 100L1 to 100L7, and then to refuel the engine by pulling the trigger of a fuel gun 109 that moves up and down using a hose reel 108 attached by a reel bracket 108L to a reel stand installed along the length of the work lanes 100L1 to 100L7. Furthermore, in a repair shop 100 that can selectively provide different grades of engine oil (new oil L11, new oil L12), gear oil, etc. according to customer requests, the shop is equipped with multiple new oil tanks 106T and fuel guns 109, and multiple high-pressure pumps 107 and new oil piping 104N located between them. Since the new oil L1 is distributed and sold in drums DC (200 liters), a low-pressure pump 106P such as a diaphragm pump is installed in order to transfer the new oil L1 from multiple drums DC to the new oil tank 106T. In addition, to prevent air from getting into the new oil piping 104N, there are cases where the level is monitored visually, but in many cases a system is adopted in which a lower limit level sensor 106S is provided in the new oil tank 106T and an alarm panel 106B is provided which stops the high-pressure pump 107 when the new oil L1 reaches the lower limit level.

[0008] In a maintenance factory 100 for implementing these conventional methods, the factory equipment generally used for the new oil system includes a new oil tank 106T, a low-pressure pump 106P, a lower limit level sensor 106S, a high-pressure pump 107, an alarm panel 106B, a new oil pipe 104N for pumping new oil L1 from the new oil tank 106T to each work lanes 100L1 to 100L7, a hose reel 108 and a fuel gun 109 attached to the end of the hose reel. Similarly, the waste oil system generally includes a drain cart 101, a waste oil pipe 104D for pumping waste oil L0 to a final waste oil tank 105, a discharge pump 102, a liquid level sensor 105S, an alarm panel 105B, etc.

[0009] However, when looking at the actual usage of these facilities, oil change operations are not necessarily always performed in all of the work lanes 100L1 to 100L7 at the repair shop 100, and the above-mentioned oil change equipment is considered to be excessive in terms of effective use. Of course, there have been proposals to use a cart equipped with a tank for changing engine oil, etc., without providing such equipment, and methods have also been proposed in which a pump is shared for supplying both new oil and waste oil. However, with these conventional methods, there is a risk that even a small amount of waste oil may be mixed with the new oil, and they are not necessarily sufficient in terms of ensuring the quality of the oil change (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Patent Publication No. 63-057808 [Patent Document 2] Patent Publication No. 6-312791 Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention has been made with this background in mind, and the technical challenge was to develop a new hydraulic fluid reservoir device that is cart-like and can be moved freely, and that can rationally perform either or both of the operations of collecting waste oil and supplying new oil to vehicle engines, etc., and that can also connect to external tanks that store the waste oil and new oil using machinery within the device.This means that the device can perform oil change operations efficiently and self-contained at low cost, even without any of the conventional equipment related to the pressure-feeding of new oil and waste oil, such as pressure pumps, piping, drain carts, or oil level monitoring in oil tanks. [Means for solving the problem]

[0012] That is, the hydraulic fluid reservoir device according to claim 1 is A movable device that treats hydraulic fluid used to operate an operating device and can temporarily store the hydraulic fluid when replacing the hydraulic fluid, The apparatus includes one or more hydraulic fluid treatment devices for treating hydraulic fluid; The hydraulic fluid treatment device includes: a hydraulic fluid storage tank; an internal pipeline provided inside the hydraulic fluid storage tank; an external pipeline provided outside the hydraulic fluid storage tank; A set of two units that switches the connection state of the pipelines inside the tank and outside the tank. One-way valve and, The three of the two One-way valve and a pump device for moving hydraulic fluid between the The above three One-way valve By switching the flow direction of the hydraulic fluid, It is something, The hydraulic fluid treatment device is configured by providing one or more new oil system hydraulic fluid treatment devices for new oil, or The hydraulic fluid treatment device is configured by combining the new oil-based hydraulic fluid treatment device with a waste oil-based hydraulic fluid treatment device for waste oil, The new oil system hydraulic fluid treatment device comprises a new oil tank as the hydraulic fluid storage tank, a new oil pump as the pump device, a new oil tank suction pipe and a new oil tank discharge pipe as the tank internal pipelines, and an external new oil tank suction pipe and a device new oil discharge pipe as the tank external pipelines, The new oil discharge pipe for the device and the external new oil tank suction pipe are joined at the terminal side to form a single common new oil pipe. The new oil pump has a new oil suction pipe and a new oil discharge pipe, The new oil suction pipe is connected to the external new oil tank suction pipe side and the new oil tank suction pipe side via one of the three-way valves in a freely switchable circuit. On the other hand, the new oil discharge pipe is connected to the new oil tank discharge pipe side and the new oil common pipe side via the other three-way valve so that the circuit can be switched freely. The flow direction in the new oil common pipe can be switched between suction and discharge by switching these three-way valves. It is characterized by the following.

[0013] The hydraulic fluid reservoir device according to claim 2 comprises: A movable device that treats hydraulic fluid used to operate an operating device and can temporarily store the hydraulic fluid when replacing the hydraulic fluid, The apparatus includes one or more hydraulic fluid treatment devices for treating hydraulic fluid; The hydraulic fluid treatment device includes: a hydraulic fluid storage tank; an internal pipeline provided inside the hydraulic fluid storage tank; an external pipeline provided outside the hydraulic fluid storage tank; A set of two units that switches the connection state of the pipelines inside the tank and outside the tank. One-way valve and, The three of the two One-way valve and a pump device for moving hydraulic fluid between the The above three One-way valve By switching the flow direction of the hydraulic fluid, It is something, The hydraulic fluid treatment device is configured by providing one or more waste oil hydraulic fluid treatment devices for waste oil, or The hydraulic fluid treatment device is configured by combining the waste oil hydraulic fluid treatment device with a new oil hydraulic fluid treatment device for new oil, The waste oil hydraulic fluid treatment device comprises a waste oil tank as the hydraulic fluid storage tank, a waste oil pump as the pump device, a waste oil tank suction pipe and a waste oil tank discharge pipe as the tank internal pipelines, and an apparatus waste oil suction pipe and an external waste oil tank discharge pipe as the tank external pipelines, The waste oil suction pipe of the equipment and the external waste oil tank discharge pipe are joined at the terminal side to form a single pipe as a shared waste oil pipe, The waste oil pump comprises a waste oil suction pipe and a waste oil discharge pipe; This waste oil suction pipe is connected to the equipment waste oil suction pipe side and the waste oil tank suction pipe side via one of the three-way valves so that the circuit can be freely switched. The waste oil discharge main pipe is connected to the waste oil tank discharge pipe side and the waste oil common pipe side via the other three-way valve, so that the circuit can be freely switched. The flow direction in the waste oil common pipe can be switched between suction and discharge by switching these three-way valves. It is characterized by the following.

[0014] Also, claims 3 The hydraulic fluid reservoir device described in the claims 1 In addition to the requirements listed, A batch meter is provided between the new oil pump and the three-way valve, This batch meter is characterized by its configuration, which allows it to selectively measure the amount of new oil filled into the new oil tank or the amount of new oil supplied from the new oil tank, depending on the switching of the three-way valve.

[0015] Also, claims 4 The hydraulic fluid reservoir device described in the claims 2 In addition to the requirements listed, A batch meter is provided between the waste oil pump and the three-way valve, This batch meter is characterized by its configuration, which allows it to selectively measure the amount of waste oil collected into the waste oil tank or the amount of waste oil discharged from the waste oil tank, depending on the switching of the three-way valve.

[0016] Also, claims 5 The hydraulic fluid reservoir device described in the claimsAny one of items 1 to 4 In addition to the requirements listed, before Records and records oil pump or New oil pump In Suction side and discharge side and The three-way valve is characterized by its synchronized operation.

[0017] Also, claims 6 The hydraulic fluid reservoir device described in the claims Any one of items 1 to 5 In addition to the requirements listed, A waste oil common pipe provided in the waste oil system hydraulic fluid treatment device or The new oil common pipe provided in the new oil system hydraulic fluid treatment device is characterized by having one coupler element of a one-touch coupler at its end.

[0018] Also, claims 7 The hydraulic fluid reservoir device described in the claims Any one of items 1 to 6 In addition to the requirements listed, Waste oil tank or New oil tank 、 So Re The body is configured as a strength member, and the waste oil pump is attached to the upper surface of the body. or It is characterized by being equipped with a new oil pump.

[0019] Also, claims 8 The hydraulic fluid reservoir device described in the claims 7 In addition to the requirements listed, The waste oil tank configured as the strength member or This tank is characterized by having casters attached near the bottom of the new oil tank.

[0020] Also, claims 9 The hydraulic fluid reservoir device described in the claims Any one of items 1 to 8 In addition to the requirements listed, Waste oil tank or New oil tank , abandoned Oil tank suction pipe Also The end of the new oil tank suction pipe is connected to the bottom of the waste oil tank. AlsoThe ends of the new oil tank are extended to the bottom of the used oil tank, and the ends of the new oil tank are extended to the bottom of the used oil tank. Also The new oil tank is characterized by having a drain opening at the bottom. The above problems are solved by taking advantage of the features of each claim. [Effects of the Invention]

[0021] First, according to the invention described in claim 1, the connection state of the pipeline between the in-tank pipeline provided inside the hydraulic fluid storage tank and the out-tank pipeline provided outside the hydraulic fluid storage tank is three sets of two units. One-way valve By switching the valve, the flow direction of the hydraulic fluid can be switched, so that suction and discharge of the hydraulic fluid between the hydraulic fluid storage tank and the outside can be easily and reliably switched. Furthermore, according to the present invention, the state of suction and discharge of new oil between the hydraulic fluid storage tank and the outside can be easily and reliably switched. Therefore, particularly when a hydraulic fluid reservoir device is provided with multiple new oil hydraulic fluid treatment devices, different types of oil can be easily and reliably filled separately into different hydraulic fluid storage tanks, and the desired oil can be easily and reliably supplied separately from the hydraulic fluid storage tank to the actuator. Furthermore, according to the present invention, the state of suction and discharge of new oil or waste oil between the hydraulic fluid storage tank and the outside can be easily and reliably switched. This makes it possible to easily and reliably fill the hydraulic fluid storage tank with new oil, supply new oil from the hydraulic fluid storage tank to the operating device, collect waste oil into the hydraulic fluid storage tank, and discharge waste oil from the hydraulic fluid storage tank to an external waste oil tank. In addition, the present invention streamlines the supply of new oil to vehicle engines, etc., and allows the connection to an external tank for storing new oil to be performed by a machine within the device, making the oil change process self-contained. In particular, by using a one-way pump that does not rotate forward or backward, the flow direction of the new oil in the shared pipeline can be switched between suction and discharge by switching the three-way valve. Specifically, in the new oil system hydraulic fluid treatment device, the new oil discharge pipe of the device and the external new oil tank suction pipe merge at the terminal to form a single pipeline called the new oil common pipe.As a result, the pipeline that is operated during work can be operated simply by switching the oil flow direction within the single pipeline of the new oil common pipe, and the desired work can be performed.

[0022] Furthermore, according to the invention described in claim 2, the flow direction of the hydraulic fluid can be switched by switching the connection state of the pipeline between the in-tank pipeline provided inside the hydraulic fluid storage tank and the out-tank pipeline provided outside the hydraulic fluid storage tank using a set of two three-way valves, thereby making it possible to easily and reliably switch between suction and discharge of the hydraulic fluid between the hydraulic fluid storage tank and the outside. Furthermore, according to the present invention, the state of suction and discharge of waste oil between the hydraulic fluid storage tank and the outside can be easily and reliably switched. Therefore, when multiple waste oil hydraulic fluid treatment devices are installed in a hydraulic fluid reservoir device, different types of oil can be recovered separately without mixing, and by discharging the oil separately from the hydraulic fluid storage tank to an external waste oil tank, etc., it is also possible to properly treat the industrial waste afterwards. Furthermore, according to the present invention, the state of suction and discharge of new oil or waste oil between the hydraulic fluid storage tank and the outside can be easily and reliably switched. This makes it possible to easily and reliably fill the hydraulic fluid storage tank with new oil, supply new oil from the hydraulic fluid storage tank to the operating device, collect waste oil into the hydraulic fluid storage tank, and discharge waste oil from the hydraulic fluid storage tank to an external waste oil tank. In addition, according to the present invention, the waste oil recovery work for vehicle engines, etc. can be carried out rationally, and the connection to an external tank for storing the waste oil can be performed by the machine inside the device, so that the oil change work can be self-contained, so to speak. In particular, by using a one-way pump that does not rotate forward or backward, the flow direction of the waste oil in the shared pipeline can be switched between suction and discharge by switching the three-way valve. Specifically, in the waste oil hydraulic fluid treatment device, the waste oil suction pipe of the device and the external waste oil tank discharge pipe are joined at the terminal to form a single pipe called the waste oil shared pipe.As a result, the pipe that is operated during work can be operated simply by switching the oil flow direction within the single pipe called the waste oil shared pipe, and the desired work can be performed.

[0023] Also, claims 3 According to the described invention, a batch meter installed between the new oil pump and the three-way valve can selectively measure the amount of new oil filled into the new oil tank or the amount of new oil supplied from the new oil tank depending on the switching of the three-way valve, thereby reliably preventing overflow of new oil in the new oil tank or operating device.

[0024] Also, claims 4According to the described invention, a batch meter installed between the waste oil pump and the three-way valve can selectively measure the amount of waste oil collected into the waste oil tank or the amount of waste oil discharged from the waste oil tank depending on the switching of the three-way valve, thereby reliably preventing overflow of waste oil in the waste oil tank or external waste oil tank.

[0025] Also, claims 5 According to the invention described, a waste oil hydraulic fluid treatment device and Waste oil pumps installed in each new oil system hydraulic fluid treatment device or The three-way valves on the suction and discharge sides of the new oil pump are operated in sync, making it easy to operate and eliminating mistakes when switching between flow paths.

[0026] Also, claims 6 According to the invention, the waste oil common pipe or New oil shared pipe 、 It is equipped with one end of a one-touch coupler, and the various devices to be worked on are also equipped with the other end of a coupler that corresponds to this coupler, allowing for appropriate connections depending on the application.

[0027] Also, claims 7 According to the invention described above, the waste oil tank or New oil tank 、 They themselves are constructed as strength members, and surface Waste oil pump or A new oil pump, etc. can be installed, and overall, frame members supporting the tank, etc. can be eliminated, resulting in a simple configuration.

[0028] Also, claims 8 According to the described invention, the hydraulic fluid reservoir device can be made highly mobile by itself, with a simple structure that does not require frame members or the like to support the tank.

[0029] Also, claims 9 According to the described invention, a waste oil tank or New oil tank 、Connect the end of the waste oil tank suction pipe or new oil tank suction pipe to the bottom of the waste oil tank. Also extends to the bottom of the new oil tank and the bottom of the waste oil tank directly below each terminal Also The new oil tank has a drain pipe opening at the bottom, which allows for effective inspection and removal of foreign matter clogging the suction pipe on the tank side, particularly the end of the waste oil tank suction pipe. [Brief explanation of the drawings]

[0030] [Figure 1] 1 is a perspective view showing a repair shop in which an oil change device, which is an example of a hydraulic fluid reservoir device of the present invention, is used. [Figure 2-1] 1 is a front view showing an oil change device shown as a first embodiment. [Figure 2-2] FIG. [Figure 2-3] FIG. [Figure 2-4] FIG. [Figure 3-1] This is a perspective view showing the synchronized operation of the three-way valve connected to the waste oil suction pipe and the three-way valve connected to the waste oil discharge pipe by the connecting handle, and the flow of waste oil. [Figure 3-2] This is a perspective view showing the synchronized operation of a three-way valve connected to a new oil suction pipe and a three-way valve connected to a new oil discharge pipe via a metering pipe and attached to the top of the new oil pump by a bracket, using a connecting handle, and the flow of new oil. [Figure 4] FIG. 10 is a plan view showing how the rotation angle of the switching lever is restricted to 90° by a notch formed in the switching lever and a stopper provided on the three-way valve. [Figure 5-1] This is a conceptual diagram showing how new oil is being filled from an external new oil tank into a new oil tank in an oil change device. [Figure 5-2] This is a conceptual diagram showing how waste oil is collected from an operating device into a waste oil tank in an oil change device. [Figure 5-3]FIG. 1 is a conceptual diagram showing how new oil is supplied from a new oil tank to an operating device in an oil change device. [Figure 5-4] FIG. 1 is a conceptual diagram showing how waste oil is discharged from a waste oil tank in an oil change device to an external waste oil tank. [Figure 6-1] FIG. 10 is a front view showing an oil change device shown as a second embodiment. [Figure 6-2] FIG. [Figure 6-3] FIG. [Figure 6-4] FIG. [Figure 7] This is a perspective view showing the synchronized operation of the three-way valve connected to the new oil suction pipe and the new oil discharge pipe via a metering pipe, and the three-way valve attached to the top of the new oil pump by a bracket, using a connecting handle, and the flow of new oil. [Figure 8-1] This is a conceptual diagram showing how new oil is being filled from an external new oil tank into a new oil tank in an oil change device. [Figure 8-2] This is a conceptual diagram showing how new oil is being filled from an external new oil tank into another new oil tank in an oil change device. [Figure 8-3] FIG. 1 is a conceptual diagram showing how new oil is supplied from a new oil tank to an operating device in an oil change device. [Figure 8-4] This is a conceptual diagram showing how new oil is supplied to an operating device from a separate new oil tank in an oil change device. [Figure 9-1] FIG. 10 is a front view showing an oil change device shown as a third embodiment. [Figure 9-2] FIG. [Figure 9-3] FIG. [Figure 9-4] FIG. [Figure 10] This is a perspective view showing the synchronized operation of the three-way valve connected to the new oil suction joint and the three-way valve connected to the new oil discharge joint by the connecting handle, and the flow of new oil. [Figure 11-1]This is a conceptual diagram showing how new oil is filled from an external new oil tank into a new oil tank in an oil change device. [Figure 11-2] This is a conceptual diagram showing how waste oil is collected from an operating device into a waste oil tank in an oil change device. [Figure 11-3] FIG. 1 is a conceptual diagram showing how new oil is supplied from a new oil tank to an operating device in an oil change device. [Figure 11-4] This is a conceptual diagram showing how waste oil is discharged from a waste oil tank in an oil change device to an external waste oil tank. [Figure 12] FIG. 10 is a front view showing an oil change device shown as a fourth embodiment. [Figure 13] FIG. 10 is a front view showing an oil change device shown as a fifth embodiment. [Figure 14] FIG. 10 is a conceptual diagram showing a configuration capable of automatically controlling the amount of new oil filled into a new oil tank and the amount of waste oil collected into a waste oil tank, as shown in Example 6. [Figure 15] FIG. 10 is a conceptual diagram showing a configuration in which the amount of new oil to be filled into the new oil tank and the amount of new oil to be supplied from the new oil tank to the operating device can be preset using a single batch meter, as shown in Example 7. [Figure 16] This is a perspective view of an existing repair shop equipped with various facilities for oil change work, which are considered to be excessive facilities. DETAILED DESCRIPTION OF THE INVENTION

[0031] The present invention will be described in detail below with reference to the following preferred embodiments, and various modifications are also possible within the scope of the present invention. [Example]

[0032] The hydraulic fluid reservoir device of the present invention is a movable device that processes hydraulic fluid (waste oil L0, new oil L1) used to operate a hydraulic device, and can temporarily store the hydraulic fluid when replacing the hydraulic fluid. This device is equipped with one or more hydraulic fluid treatment devices (waste oil type hydraulic fluid treatment device 2, new oil type hydraulic fluid treatment device 3) that treat the hydraulic fluid. The hydraulic fluid treatment devices include hydraulic fluid storage tanks (waste oil tank 2t, new oil tank 3t) and in-tank pipelines (waste oil tank suction pipe 24, waste oil tank discharge pipe 25, new oil tank suction pipe 26) provided inside the hydraulic fluid storage tanks. The hydraulic fluid storage tank is provided with an external pipeline (a waste oil suction pipe 23, an external waste oil tank discharge pipe 26, an external new oil tank suction pipe 34, and a new oil discharge pipe 35) outside the tank, a pair of three-way switching valves (three-way valves 22a, 22b, 32a, and 32b) for switching the connection state of the pipelines inside the tank and outside the tank, and a pump device (a waste oil pump 2p and a new oil pump 3p) for moving the hydraulic fluid between the two three-way switching valves, and the flow direction of the hydraulic fluid is switched by switching the three-way switching valves. Ta It is something.

[0033] More specifically, in the drawing, reference numeral 1 denotes an oil change device 1 which is an example of a hydraulic fluid reservoir device according to the present invention. Furthermore, in The title of the invention and the claims refer to the hydraulic fluid reservoir device because the "reserve" refers to the work commonly performed in automobile repair shops, which are typical examples of places where the present invention is required, particularly large-scale repair shops 100 for large vehicles, where engine oil, etc. is replaced, and when the engine oil, etc. is replaced, it is temporarily reserved in the device of the present invention. On the other hand, with regard to the "hydraulic fluid," the present invention can be used not only for changing oil, but also for changing coolant for cooling the engine of vehicle T, especially coolant containing antifreeze, and is not limited to oil containing oily components, so it is referred to as a "hydraulic fluid reservoir device." Therefore, in the following embodiments, the hydraulic fluid reservoir device of the present invention will be described as an oil change device 1 that targets waste oil L0 and new oil L1, but various types of hydraulic fluids can be applied to the hydraulic fluid itself. Below, we will explain an oil change device 1 that targets waste oil L0 and new oil L1 as [Example 1], and an oil change device 1 that targets two types of new oil L1 as [Example 2], and then we will explain modified examples of these, [Example 3] to [Example 7]. [Example]

[0034] First, the oil change device 1 for treating waste oil L0 and new oil L1 will be described with reference to Figures 2 to 5. The main component of this oil change device 1 as a whole is a device housing 11, which is a rectangular parallelepiped container equipped with a front panel 111, a back panel 112, left and right side panels 113 and 114, a top panel 115, and a bottom panel 116. The device housing 11 as a whole has sufficient strength as required, and the components of the waste oil system working fluid treatment device 2 and new oil system working fluid treatment device 3 of the oil change device 1 are held on, for example, the top panel 115. The interior of the device housing 11 is essentially divided by a central partition plate 117, one side being configured as the waste oil tank 2t which is the hydraulic oil storage tank, and the other side being configured as the new oil tank 3t which is also the hydraulic oil storage tank, and these waste oil tank 2t and new oil tank 3t are themselves configured as strength members.

[0035] As tanks for storing the waste oil L0 and new oil L1, in addition to the waste oil tank 2t and new oil tank 3t provided in the oil change device 1, an external waste oil tank 2T and an external new oil tank 3T using drums DC or the like may be provided as storage facilities in a corner of the maintenance factory 100 or outside the maintenance factory 100. Of course, the final waste oil tank 105 and new oil tank 106T described in the [Background Art] section can also be used as these external waste oil tank 2T and external new oil tank 3T.

[0036] For this device housing 11, casters 12 are provided near the underside of bottom plate 116, and handle 13 is provided near top plate 115 so as to protrude slightly upward from side plates 113, 114. As can be seen from this configuration, the entire oil change device 1 is configured to be freely movable, so to speak, like a cart. Furthermore, by using large casters with a wheel diameter of about 150 mm as the casters 12, the travelling ability of the oil change device 1 can be improved, enabling smooth movement, and the operability of the oil change device 1 that is moved long distances of about 50 m within the repair shop 100 can be improved. Furthermore, by providing the casters 12 with brakes, it is possible to prevent the oil change device 1 from moving unintentionally during the oil change operation. In addition, since the handles 13 are provided on the left and right sides of the device housing 11, when the vehicle T is positioned in the work lane 100L of the maintenance workshop 100, the handles 13 can be gripped with both hands from either the left or right side of the narrow space beside the vehicle T to move it.

[0037] The side plates 113, 114 are provided with hose hangers 14, which respectively hold a hose-like waste oil common pipe 27 in the waste oil-based hydraulic fluid treatment device 2, which will be described later, and a hose-like new oil common pipe 37 in the new oil-based hydraulic fluid treatment device 3. Of course, in addition to holding the waste oil common pipe 27 and the new oil common pipe 37 on the hose hangers 14 in this way, the entire hose can also be configured in the form of a hose reel, so to speak.

[0038] Furthermore, on the top plate 115, the waste oil pump 2p, which is the pump device of the waste oil system hydraulic fluid treatment device 2, its related components, related piping, etc. are arranged, and similarly, the new oil pump 3p, which is the pump device of the new oil system hydraulic fluid treatment device 3, and its related piping, etc. are arranged. In addition, a drive air system device 15 is provided for driving the waste oil pump 2p and the new oil pump 3p, which is equipped with an air joint 151 for receiving air supply from outside and an air cock 152 for disconnecting the air supply on the top plate 115, and furthermore, a regulator 153 for setting the operating air pressure is installed on one of the side plates 114. In this embodiment, a diaphragm type, which is an example of an air-driven one-way pump, is used as the waste oil pump 2p and the new oil pump 3p, but other pumps or electrically driven pumps may of course also be used.

[0039] In addition, a waste oil receiving pan 16 is provided above the top plate 115, and is composed of a pan body 161 and an extension tray 162, and further comprises an inlet pipe 163 that extends downward and leads to the inside of the waste oil tank 2t. This introduction pipe 163 is fitted into a receiving sleeve 164 provided on the top plate 115, and is configured so that its fixed position for sliding up and down can be selected by tightening an appropriate lock bolt or the like on the side.

[0040] Further, below the bottom plate 116, a storage tray 17 is provided in the form of a drawer for storing attachments, tools, etc. required for oil change work. The shape of the storage tray 17 is required to avoid interference with drain openings 2d and 3d and casters 12, which will be described later, and this point will be mentioned in detail later.

[0041] The configurations and piping arrangements of the waste oil hydraulic fluid treatment device 2 and the new oil hydraulic fluid treatment device 3 are shown in Figs. 2-1 to 2-4, 3-1, and 3-2. 、 This will be specifically described with reference to FIGS. 5-1 to 5-4. First, the waste oil pump 2p is provided with a waste oil suction pipe 21a and a waste oil discharge pipe 21b. The waste oil suction pipe 21a is connected to the outside of the tank via a three-way valve 22a, which is a three-way selector valve. conduit The barrel device waste oil suction pipe 23 and the waste oil tank suction pipe 24, which is the in-tank pipe, are connected in a manner that allows the circuit to be freely switched. On the other hand, the waste oil discharge main pipe 21b is connected to the waste oil tank discharge pipe 25, which is the in-tank pipe, and the waste oil tank discharge pipe 26, which is the out-tank pipe, via a three-way valve 22b, which is a three-way switching valve. conduit The oil supply pipe 24 is connected to an external waste oil tank discharge pipe 26 in a manner that allows the circuit to be freely switched.

[0042] The new oil pump 3p also has a new oil suction joint 31a and a new oil discharge joint 31b, and the new oil suction joint 31a is connected to a new oil tank suction pipe 33, which is the internal tank line, and an external new oil tank suction pipe 34, which is the external tank line, via a three-way valve 32a, which is a three-way switching valve, in a manner that allows for free circuit switching. A three-way valve 32b, which is a three-way switching valve, is attached to the top of the new oil pump 3p using a bracket 32B, and via this three-way valve 32b, the device new oil discharge pipe 35, which is the pipeline outside the tank, and the new oil tank discharge pipe 36, which is the pipeline inside the tank, are connected in a manner that allows for free circuit switching. Furthermore, a metering pipe 30 is connected between the new oil discharge main pipe 31b and the three-way valve 32b, and this metering pipe 30 is equipped with a flow meter, or batch meter 30M, which can automatically stop the supply of new oil L1 when the desired amount of new oil L1 has been supplied.

[0043] In addition, the device waste oil suction pipe 23 and the external waste oil tank discharge pipe 26 in the waste oil system hydraulic fluid treatment device 2 join at the terminal side to form a single pipeline as the waste oil shared pipe 27, and the waste oil discharge main pipe 21b is configured to be connected to the waste oil tank discharge pipe 25 side and the waste oil shared pipe 27 side via a three-way valve 22b so that the circuit can be freely switched. On the other hand, the new oil discharge pipe 35 of the device in the new oil system hydraulic fluid treatment device 3 and the external new oil tank suction pipe 34 merge at the terminal side to form a single pipeline as a new oil shared pipe 37, and the new oil discharge main pipe 31b is configured to be connected to the new oil tank discharge pipe 36 side and the new oil shared pipe 37 side via a metering pipe 30 and a three-way valve 32b so that the circuit can be freely switched.

[0044] The three-way valve 22a on the suction side and the three-way valve 22b on the discharge side of the waste oil pump 2p provided in the waste oil-based hydraulic fluid treatment device 2 are configured to operate in a synchronized manner. Specifically, as shown in FIG. 3-1, the same three-way valves 22b and 22a are installed one above the other so that the rotation axes of the switching levers 22bL and 22aL provided on each are aligned. The switching levers 22bL and 22aL are integrated with a connecting handle 22L, enabling the synchronized operation of the three-way valves 22b and 22a. In this embodiment, the three-way valves 22a, 22b, 32a, and 32b are all so-called three-way cock L-port type valves with the same structure (shape and flow path within the valve).

[0045] Similarly, as shown in Figure 3-2, three-way valves 32b and 32a of the same type are installed one above the other so that the rotation axes of the switching levers 32bL and 32aL provided on each are on the same line, and these switching levers 32bL and 32aL are integrated by a connecting handle 32L, making it possible to operate the three-way valves 32b and 32a in a synchronized manner. 2-1 to 2-4 and 3-1, the three-way valve 22b directly attached to the waste oil discharge pipe 21b and the three-way valve 22a directly attached to the waste oil suction pipe 21a are arranged one above the other, but if a layout is possible using appropriate piping and brackets so that the rotation axes of the switching levers 22bL and 22aL are on the same line, the three-way valves 22b and 22a may be arranged side by side.Similarly, the three-way valves 32b and 32a may be arranged side by side.

[0046] As shown in FIG. 4, the rotation angle of the switching lever 22aL is restricted to 90° by the contact of both ends of a notch N formed in the switching lever 22aL with a protruding stopper S provided on the three-way valve 22a. Similarly, the rotation angles of the switching levers 22bL, 32aL, and 32bL are also restricted to 90°. Labels Lb with the words "Suction" and "Discharge" printed on them are affixed to the top panel 115 near both ends of the rotation range of the connecting handles 22L and 32L. In this embodiment, the position of the label Lb in the waste oil-based hydraulic fluid treatment device 2 is reversed to the position of the label Lb in the new oil-based hydraulic fluid treatment device 3, but the positions of the labels Lb on both sides can be made the same by changing the arrangement of the respective pipelines, etc.

[0047] In addition, the end of the waste oil common pipe 27 in the waste oil-based hydraulic fluid treatment device 2 is equipped with one coupler element C21 of the one-touch coupler C2, and further, as shown in Figures 5-2 and 5-4, the nozzle-shaped suction and discharge pipe 18 is equipped with the other coupler element C22.By connecting these coupler elements C21 and C22, the waste oil common pipe 27 and the suction and discharge pipe 18 can be connected easily and reliably. In addition, the end of the new oil common pipe 37 in the new oil system hydraulic fluid treatment device 3 is equipped with one coupler element C31 of the one-touch coupler C3, and further, as shown in Figure 5-1, the nozzle-shaped suction and discharge pipe 18 is equipped with the other coupler element C32, and as shown in Figure 5-3, the fuel gun 37G is equipped with the other coupler element C32.By connecting these coupler elements C31 and C32, the new oil common pipe 37 can be easily and reliably connected to the suction and discharge pipe 18, and the new oil common pipe 37 to the fuel gun 37G.

[0048] As shown by the imaginary line in FIG. 5-2, the coupler element C22 may also be provided on the oil drain cock side of the automobile engine, which is the operating device 5. Similarly, as shown by the imaginary line in FIG. 5-3, the coupler element C32 may also be provided on the oil drain cock side of the engine of the automobile, which is the operating device 5. Although not shown in the figures, the coupler elements C22 and C32 may be installed directly in the external waste oil tank 2T and the external new oil tank 3T, or pipes may be extended from each tank and the coupler elements C22 and C32 may be installed at the ends of the pipes. The coupler elements C21, C22 and the coupler elements C31, C32 may have different shapes and sizes depending on the specifications of the actuator 5, the waste oil receiving tray DT, the external waste oil tank 2T, the external new oil tank 3T, etc.

[0049] As shown in Figures 2-1 and 2-4, in the waste oil tank 2t, the end (suction port) of the waste oil tank suction pipe 24 is extended to near the bottom of the waste oil tank 2t, and a drain opening 2d is formed in the bottom of the waste oil tank 2t directly below the end (suction port) of the waste oil tank suction pipe 24. On the other hand, as shown in Figures 2-1 and 2-3, in the new oil tank 3t, the terminal (suction port) of the new oil tank suction pipe 33 is extended to near the bottom of the new oil tank 3t, and a drain opening 3d is formed in the bottom of the new oil tank 3t directly below the terminal (suction port) of the new oil tank suction pipe 33. These drain openings 2d and 3d are provided for maintenance purposes when foreign matter becomes clogged at the end (suction port) of the waste oil tank suction pipe 24 or the end (suction port) of the new oil tank suction pipe 33, and are normally closed by an appropriate cover member such as a drain plug. In consideration of ease of maintenance work, it is preferable that such drain openings 2d and 3d be located in positions that avoid the storage tray 17 provided below the bottom plate 116. In this embodiment, the width of the storage tray 17 is set shorter than the width of the bottom plate 116, so that spaces are secured on both sides below the bottom plate 116 and drain openings 2d and 3d are formed in these areas. Therefore, the waste oil tank suction pipe 24 and the new oil tank suction pipe 33 are installed in locations close to the side plates 113 and 114, respectively. The spaces secured on both sides below the bottom plate 116 also function as turning spaces for the wheels of the casters 12 directly attached near the bottom plate 116 .

[0050] The oil change device 1, which is a hydraulic fluid reservoir device of the present invention, has the above-described configuration as an example and is used as follows. [1. Preparation for the first train] In the initial preparation state, both the waste oil tank 2t and the new oil tank 3t in the oil change device 1 are empty. Meanwhile, in order to obtain compressed air to drive the waste oil pump 2p and the new oil pump 3p, an external air hose or the like is connected to the air joint 151 in the drive air system device 15. Incidentally, in automobile repair shops and the like, air tools are generally used for various maintenance and inspections, and air compressors, air hoses, etc. are always on hand.

[0051] [2. New Oil Reserve] Next, in this state, new oil L1 is filled into the new oil tank 3t of the oil change device 1, and this new oil L1 is generally stored in an external new oil tank 3T provided in a maintenance workshop 100 or the like. In this embodiment, a drum DC is used as the external new oil tank 3T, and the operation is performed by simply connecting a nozzle-shaped suction and discharge pipe 18 to the new oil common pipe 37 with a one-touch coupler, as shown in Figure 5-1, and inserting the tip of the suction and discharge pipe 18 into the external new oil tank 3T.

[0052] After connecting the new oil common pipe 37 and the external new oil tank 3T in this way, first operate the new oil pump 3p in the new oil system hydraulic fluid treatment device 3. Specifically, the air cock 152 on the new oil tank 3t side in the drive air system device 15 is opened to drive the new oil pump 3p, and new oil L1 is supplied (filled) from the external new oil tank 3T to the new oil tank 3t. At this time, as shown in Figures 5-1 and 3-2(a), the three-way valve 32a in the new oil system hydraulic fluid treatment device 3 connects the external new oil tank suction pipe 34 to the new oil suction main pipe 31a and closes the new oil tank suction pipe 33, and furthermore, the three-way valve 32b connects the new oil discharge main pipe 31b to the new oil tank discharge pipe 36 via the metering pipe 30 and closes the device new oil discharge pipe 35. As already mentioned, this operation itself is set in a linked state by the connecting handle 32L, so that by rotating the connecting handle 32L towards the "suction" label Lb, the two three-way valves 32a and 32b can be operated simultaneously.

[0053] When the circuit is set up in this way, new oil L1 is sucked into the new oil pump 3p by the action of the new oil pump 3p through the new oil common pipe 37, the external new oil tank suction pipe 34, the three-way valve 32a, and the new oil suction main pipe 31a, and then discharged from the new oil discharge main pipe 31b, and is filled into the new oil tank 3t through the metering pipe 30, the three-way valve 32b, and the new oil tank discharge pipe 36. At this time, the flow rate of the new oil L1 is measured by the batch meter 30M provided in the middle of the metering pipe 30, so that the supply of new oil L1 can be stopped when the desired amount of new oil L1 has been filled into the new oil tank 3t. The capacity of a 3-ton new oil tank is said to be capable of holding approximately 100 liters of new oil L1 (enough for about 25 passenger cars or about 4 large trucks), with a margin of around 120 liters of space. Furthermore, by dividing the new oil tank 3t into multiple sections, each section being equipped with a new oil tank discharge pipe 36 and a new oil tank suction pipe 33, and by making it possible to switch between these and three-way valves 32a, 32b, it becomes possible to select and supply new oil L1 according to the customer's preference from multiple types of new oil L1 of different grades, for example. An oil change device 1 that can handle multiple types of new oil L1 like this will be described later in Example 2.

[0054] The new oil tank 3t can also be filled with new oil L1 using an external pump through a new oil filler port 3h formed on the top plate 115 at the top of the new oil tank 3t. This new oil filler port 3h is sealed with a cap 3c when not in use. An air breather 3b is formed on the top plate 115 at the top of the new oil tank 3t, and this is where air is supplied and discharged when new oil L1 is introduced into and removed from the new oil tank 3t.

[0055] [3. Waste oil collection] In this way, the oil change device 1, in which new oil L1 is reserved, recovers waste oil L0 from the automobile engine, which is the operating device 5, and the waste oil L0 in the operating device 5 is stored in the waste oil tank 2t in the waste oil-based operating fluid treatment device 2. That is, this work is performed by connecting the waste oil common pipe 27 and the suction and discharge pipe 18 by joining the coupler element C21 provided at the end of the waste oil common pipe 27 with the coupler element C22 provided on the nozzle-shaped suction and discharge pipe 18, as shown in Figure 5-2. Waste oil L0 flowing down from the engine drain cock is temporarily stored in a waste oil receiving tray DT. 5-2 and 3-1(b), by rotating the connecting handle 22L toward the "suction" label Lb, the three-way valves 22a and 22b are operated simultaneously, connecting the equipment waste oil suction pipe 23 to the waste oil suction main pipe 21a and closing the waste oil tank suction pipe 24, connecting the waste oil tank discharge pipe 25 to the waste oil discharge main pipe 21b and closing the external waste oil tank discharge pipe 26. By operating the waste oil pump 2p in this state, the waste oil L0 in the waste oil receiving tray DT is sucked into the waste oil pump 2p via the suction and discharge pipe 18, the shared waste oil pipe 27, the equipment waste oil suction pipe 23, the three-way valve 22a, and the waste oil suction main pipe 21a, and then discharged from the waste oil discharge main pipe 21b, via the three-way valve 22b, and the waste oil tank discharge pipe 25, and collected in the waste oil tank 2t. At this time, since the waste oil common pipe 27 is equipped with a strainer 28, foreign matter such as iron powder mixed in the waste oil L0 can be filtered out, and the waste oil pump 2p can be protected.

[0056] As shown in the imaginary circle in Figure 5-2, if a coupler element C22 is provided on the oil drain cock side of the automobile engine, which is the operating device 5, the coupler element C21 provided at the end of the waste oil common pipe 27 can be connected to the coupler element C22 with a single touch, and in this state the waste oil pump 2p can be operated to recover the waste oil L0 in the engine, which is the operating device 5, into the waste oil tank 2t. 1, an operation configuration can be adopted in which the oil change device 1 is placed directly under the engine of the vehicle T, and the waste oil L0 flowing down from the engine's drain cock is received in the waste oil receiving pan 16, and the waste oil L0 is directly collected in the waste oil tank 2t through the inlet pipe 163. Similarly, an operation configuration can be adopted in which the waste oil L0 flowing down from the engine's drain cock is temporarily collected in the waste oil tank 101T of the drain cart 101 used in the existing repair shop 100 described in the [Background Art] section, and the waste oil L0 is then collected in the waste oil tank 2t of the oil change device 1 by the waste oil pump 2p. An air breather 2b is formed on the top plate 115 above the waste oil tank 2t, and air is supplied and discharged from here when the waste oil L0 is put into and taken out of the waste oil tank 2t.

[0057] [4. New oil supply] In this way, after engine oil etc. as waste oil L0 has been drained from the engine which is the actuating device 5, a portion of the new oil L1 already stored in the new oil tank 3t is supplied to the actuating device 5 from the new oil system actuating fluid treatment device 3. To do this, first, as shown in FIG. 5-3, coupler element C31 provided at the end of new oil common pipe 37 and coupler element C32 provided on fuel gun 37G are connected with a single touch. Next, as shown in Figures 5-3 and 3-2(b), by rotating the connecting handle 32L toward the "Discharge" label Lb, the three-way valve 32a is switched to a state in which the new oil suction joint 31a and the new oil tank suction pipe 33 are connected and the external new oil tank suction pipe 34 is closed. At this time, the three-way valves 32a and 32b are set to an interlocked synchronized state by the connecting handle 32L, so the three-way valve 32b connects the new oil discharge joint 31b and the device new oil discharge pipe 35 via the metering pipe 30 and closes the new oil tank discharge pipe 36. When the new oil pump 3p is operated in this state, the new oil L1 in the new oil tank 3t is sucked into the new oil pump 3p via the new oil tank suction pipe 33, the three-way valve 32a, and the new oil suction main pipe 31a, and then discharged from the new oil discharge main pipe 31b, and is supplied to the automobile engine, which is the operating device 5, via the fuel gun 37G. At this time, by setting the batch meter 30M provided on the metering pipe 30, it is possible to measure and supply the desired amount of fuel. In addition, as shown in the imaginary circle in Figure 5-3, if a coupler element C32 is provided on the oil drain cock side of the automobile engine, which is the operating device 5, an operating form can also be adopted in which the coupler element C31 provided at the end of the new oil common pipe 37 is connected to the coupler element C32 by a coupler to supply oil.

[0058] [5. External discharge of waste oil] When the above-mentioned series of operations of collecting the waste oil L0 and supplying the new oil L1 is repeated for several vehicles T, the amount of new oil L1 reserved in the new oil tank 3t decreases, while the waste oil tank 2t approaches a full tank of waste oil L0. In theory, both the waste oil tank 2t and the new oil tank 3t are never full, and the system will contain roughly half the total amount of oil in both tanks. This state can be visually observed from the outside using level gauges 29, 39 etc. provided near the side plates 113, 114 of the front plate 111.

[0059] When the waste oil L0 in the waste oil tank 2t becomes full, it is discharged to the outside. In this embodiment, a drum DC is used as the external waste oil tank 2T, and as shown in Figure 5-4, the suction and discharge pipe 18 is connected to the waste oil common pipe 27 with a one-touch coupler, and the tip of the suction and discharge pipe 18 is inserted into the external waste oil tank 2T. As shown in Figures 5-4 and 3-1(a), by rotating the connecting handle 22L toward the "discharge" label Lb, the three-way valves 22a and 22b are operated synchronously, so that the waste oil tank suction pipe 24 is connected to the waste oil suction main pipe 21a and the device waste oil suction pipe 23 is closed, and the external waste oil tank discharge pipe 26 is connected to the waste oil discharge main pipe 21b and the waste oil tank discharge pipe 25 is closed. By operating the waste oil pump 2p in this state, the waste oil L0 in the waste oil tank 2t is sucked into the waste oil pump 2p via the waste oil tank suction pipe 24, the three-way valve 22a, and the waste oil suction main pipe 21a, and then discharged from the waste oil discharge main pipe 21b, and collected in the external waste oil tank 2T via the three-way valve 22b, the external waste oil tank discharge pipe 26, the waste oil common pipe 27, and the suction and discharge pipe 18. At this time, the waste oil L0 can be used to backwash and remove foreign matter accumulated in the strainer 28. Eventually, when the 3 ton new oil tank becomes empty, it returns to the new oil reserve state as described above, and oil changes and other procedures are carried out in the same manner.

[0060] In the above explanation, it was assumed that the oil change device 1 smoothly filled the new oil L1 from the external new oil tank 3T to the new oil tank 3t, supplied the new oil L1 from the new oil tank 3t to the operating device 5, collected the waste oil L0 from the operating device 5 to the waste oil tank 2t, and discharged the waste oil L0 from the waste oil tank 2t to the external waste oil tank 2T.However, below we will explain an example of a problem and an example of how to deal with it. Specifically, for example, as shown in Figure 5-4, when waste oil L0 is discharged from the waste oil tank 2t of the oil change device 1 to an external waste oil tank 2T using a drum can DC through the waste oil tank suction pipe 24 and the waste oil shared pipe 27, it is difficult to properly observe the situation inside the drum can DC, and the waste oil L0 may overflow or nearly overflow. In such a case, the usual solution would be to stop the waste oil pump 2p, but with the oil change device 1, which is an example of a hydraulic fluid reservoir device according to the present invention, the waste oil pump 2p can be left running without being stopped, instantly preventing the overflow of waste oil L0. Simply by rotating the connecting handle 22L from the "discharge" label Lb side to the "suction" label Lb side, the circuit of the waste oil-based hydraulic fluid treatment device 2 can be switched as shown in Figure 5-2, instantly switching the waste oil common pipe 27 from the discharge state to the suction state and sucking the waste oil L0 from the external waste oil tank 2T back into the waste oil tank 2t. Of course, this switching of the state of the waste oil shared pipe 27 by operating the connecting handle 22L can also be performed when the waste oil shared pipe 27 is connected to the waste oil receiving tray DT, or when the waste oil shared pipe 27 is connected to the operating device 5 and waste oil L0 is being collected in the waste oil tank 2t.

[0061] In this embodiment 1, the flow rate of the new oil L1 is measured by a batch meter 30M in the new oil system hydraulic fluid treatment device 3, and when new oil is reserved, the amount of new oil L1 located in the new oil tank 3t is known, so that the new oil pump 3p can be reliably stopped before the new oil tank 3t becomes full, thereby avoiding overflow. On the other hand, when new oil L1 is supplied from the new oil tank 3t to the actuator 5, the batch meter 30M is set according to the capacity of the actuator 5, and the desired amount of new oil L1 is supplied to the actuator 5, so overflow does not occur. However, if the capacity of the actuator 5 is incorrectly recognized, overflow may occur. Even in such a case, the circuit of the new oil-based hydraulic fluid treatment device 3 can be switched from the state shown in Figure 5-3 to the state shown in Figure 5-1 simply by rotating the connecting handle 32L from the "discharge" label Lb side to the "suction" label Lb side. This instantly switches the new oil shared pipe 37 from the discharge state to the suction state, sucking the new oil L1 back into the new oil tank 3t and instantly preventing overflow of the new oil L1. [Example]

[0062] Next, the oil change device 1 for two types of new oil L1 will be described with reference to Figures 6 to 8. The oil change device 1 shown in this second embodiment has the same basic configuration as the device shown in the first embodiment, so only the differences in the device configuration will be described below. The oil change device 1 shown in Example 2 is not intended to be used alone, but is intended to be used in conjunction with, for example, an oil change device 1 (shown in Example 1 or Example 3) equipped with a waste oil-based working fluid treatment device 2. For this reason, the oil change device 1 shown in Example 2 is equipped with a new oil-based working fluid treatment device 3L in place of the waste oil-based working fluid treatment device 2 in Example 1, and functions as a new oil supply device equipped with two new oil-based working fluid treatment devices 3 (3L, 3R) in the device housing 11. It is also possible to use one of the new oil-based hydraulic fluid treatment devices 3 (for example, the new oil-based hydraulic fluid treatment device 3L) to treat the waste oil L0. In this case, the oil change device 1 shown in Example 2 can be used alone in the same way as the oil change device 1 shown in Example 1.

[0063] In addition, in Example 2, the device housing 11 equipped with the storage tray 17 shown in Example 1 was reused, and therefore the components of the two new oil system hydraulic fluid treatment devices 3L and 3R were arranged symmetrically on either side of the partition plate 117 in the device housing 11 so that the new oil tank suction pipe 33 was positioned directly above the drain opening 2d in Figure 2-4. Therefore, the piping arrangement around the new oil pump 3p in the new oil system hydraulic fluid treatment device 3L on the left side when viewed from the front is different from that shown in Figure 3-2, as shown in Figure 7. Specifically, the attachment positions of the new oil tank suction pipe 33 and the external new oil tank suction pipe 34 to the three-way valve 32a are reversed, and the attachment positions of the device new oil discharge pipe 35 and the new oil tank discharge pipe 36 to the three-way valve 32b are reversed. Furthermore, the routing direction of the metering pipe 30 attached between the new oil discharge main pipe 31b and the three-way valve 32b is also reversed.

[0064] As a result, the new oil pump 3p provided in the new oil system hydraulic fluid treatment device 3R shown in Figure 3-2 is in a suction state when the connecting handle 32L is rotated to the right, and in a discharge state when the connecting handle 32L is rotated to the left, whereas the new oil pump 3p provided in the new oil system hydraulic fluid treatment device 3L shown in Figure 7 is in a discharge state when the connecting handle 32L is rotated to the right, and in a suction state when the connecting handle 32L is rotated to the left. Accordingly, the position of the label Lb with the words "suction" and "discharge" printed on it and affixed to the top plate 115 is reversed between the new oil system hydraulic fluid treatment device 3L and the new oil system hydraulic fluid treatment device 3R.

[0065] In the above configuration, the components of the two new oil system hydraulic fluid treatment devices 3L, 3R are arranged symmetrically on either side of the partition plate 117 in the device housing 11, but the components of the two new oil system hydraulic fluid treatment devices 3L, 3R may be arranged in the same manner and in parallel.

[0066] As mentioned above, the oil change device 1 shown in Example 2 is not intended to be used alone, but is intended to be used in conjunction with the oil change device 1 shown in Example 1, etc., and is therefore not designed to be equipped with a waste oil-based hydraulic fluid treatment device 2. When such a combination is used, it becomes possible to selectively supply three types of new oil L1 to the operating device 5 at the maintenance factory 100, and for example, three different types of engine oil are reserved in each of the new oil system operating fluid treatment devices 3, 3L, and 3R. Here, the three types of new oil L1 may be different types of oil such as engine oil, transmission oil, and differential oil, or may be three types of engine oil of different grades.

[0067] On the other hand, waste oil L0 can be collected and treated as industrial waste regardless of the type and grade of oil, so one waste oil tank of 2 tons is sufficient. Of course, if more delicate treatment of the waste oil L0 is required, this can be accommodated by equipping the oil change device 1 with multiple waste oil tanks 2t (waste oil hydraulic fluid treatment device 2). Such a case is envisioned, for example, when handling engine oil from diesel engine vehicles, which is more polluted than engine oil from gasoline engine vehicles, and by separating these without mixing them and storing them in the oil change device 1, it becomes possible to carry out subsequent treatment appropriately. In this case, by configuring the waste oil type hydraulic fluid treatment device 2 to include a batch meter (30M) similar to the new oil type hydraulic fluid treatment device 3 shown in Figures 2 and 6, it becomes possible to discharge a fixed amount of waste oil L0 from the waste oil tank 2t and recover a fixed amount of waste oil L0 to the waste oil tank 2t.

[0068] The oil change device 1, which is a hydraulic fluid reservoir device of the present invention shown in this second embodiment, has the above-described configuration as an example and is used as follows. The recovery of waste oil L0 from the operating device 5, which is an automobile engine, is carried out, as an example, by a waste oil-based operating fluid treatment device 2 provided in the oil change device 1 shown in Example 1, in the same manner as in Example 1.

[0069] [1. Preparation for the first train] In the initial preparation state, both new oil tanks 3t in the new oil system hydraulic fluid treatment devices 3L and 3R are assumed to be empty. Meanwhile, to obtain compressed air to drive the new oil pump 3p, an external air hose or the like is connected to the air joint 151 in the drive air system device 15. Incidentally, in automobile repair shops and the like, air tools are generally used for various maintenance and inspections, and air compressors, air hoses, etc. are always on hand.

[0070] [2. New Oil Reserve] Next, in this state, new oil L11 is filled into the new oil tank 3t of the new oil system hydraulic fluid treatment device 3R, and this new oil L11 is generally stored in an external new oil tank 3T installed in a maintenance workshop 100 or the like. In this embodiment, a drum DC is used as the external new oil tank 3T, and the operation is performed by simply connecting a nozzle-shaped suction and discharge pipe 18 to the new oil common pipe 37 with a one-touch coupler, as shown in Figure 8-1, and inserting the tip of the suction and discharge pipe 18 into the external new oil tank 3T.

[0071] In this way, after connecting the new oil shared pipe 37 to the external new oil tank 3T, first operate the new oil pump 3p in the new oil system hydraulic fluid treatment device 3R, and supply (fill) new oil L11 from the external new oil tank 3T to the new oil tank 3t. At this time, as shown in Figures 8-1 and 3-2(a), the three-way valve 32a in the new oil system hydraulic fluid treatment device 3R connects the external new oil tank suction pipe 34 to the new oil suction main pipe 31a, and the new oil tank suction pipe 33 is closed, and further, the three-way valve 32b connects the new oil discharge main pipe 31b to the new oil tank discharge pipe 36 via the metering pipe 30, and the device new oil discharge pipe 35 is closed.

[0072] When the circuit is set up in this way, new oil L11 is sucked into the new oil pump 3p by the action of the new oil pump 3p through the new oil common pipe 37, the external new oil tank suction pipe 34, the three-way valve 32a, and the new oil suction main pipe 31a, and then discharged from the new oil discharge main pipe 31b, and is filled into the new oil tank 3t through the metering pipe 30, the three-way valve 32b, and the new oil tank discharge pipe 36. At this time, the flow rate of the new oil L11 is measured by the batch meter 30M provided in the middle of the metering pipe 30, so that the desired amount of new oil L1 can be filled into the new oil tank 3t.

[0073] [3. Reserve different new oil] Next, in this state, new oil L12 is filled into the new oil tank 3t of the new oil system hydraulic fluid treatment device 3L, and this new oil L12 is generally stored in an external new oil tank 3T installed in a maintenance workshop 100 or the like. As shown in Figure 8-2, the operation is carried out by simply connecting a nozzle-shaped suction and discharge pipe 18 to the new oil common pipe 37 with a one-touch coupler, and inserting the tip of the suction and discharge pipe 18 into the external new oil tank 3T.

[0074] In this way, after connecting the new oil shared pipe 37 to the external new oil tank 3T, first operate the new oil pump 3p in the new oil system hydraulic fluid treatment device 3L to supply (fill) new oil L11 from the external new oil tank 3T to the new oil tank 3t. At this time, as shown in Figures 8-2 and 7(b), the three-way valve 32a in the new oil system hydraulic fluid treatment device 3L connects the external new oil tank suction pipe 34 to the new oil suction main pipe 31a, and the new oil tank suction pipe 33 is closed, and further, the three-way valve 32b connects the new oil discharge main pipe 31b to the new oil tank discharge pipe 36 via the metering pipe 30, and the device new oil discharge pipe 35 is closed.

[0075] When the circuit is set up in this way, new oil L12 is sucked into the new oil pump 3p by the action of the new oil pump 3p through the new oil common pipe 37, the external new oil tank suction pipe 34, the three-way valve 32a, and the new oil suction main pipe 31a, and then discharged from the new oil discharge main pipe 31b, and is filled into the new oil tank 3t through the metering pipe 30, the three-way valve 32b, and the new oil tank discharge pipe 36. At this time, the flow rate of the new oil L12 is measured by the batch meter 30M provided in the middle of the metering pipe 30, so that the desired amount of new oil L12 can be filled into the new oil tank 3t.

[0076] [4. New oil supply] After the two different types of new oil L11, L12 are stored in the new oil system hydraulic fluid treatment devices 3L, 3R in this way, one of them is selected and supplied to the operating device 5 according to the user's request. First, to supply new oil L11, as shown in Figure 8-3, the coupler element C31 provided at the end of the new oil common pipe 37 and the coupler element C32 provided on the fuel gun 37G are connected with a single touch coupler. Next, as shown in Figures 8-3 and 3-2(b), by rotating the connecting handle 32L toward the "Discharge" label Lb, the three-way valve 32a is switched to a state in which the new oil suction joint 31a and the new oil tank suction pipe 33 are connected and the external new oil tank suction pipe 34 is closed. At this time, the three-way valves 32a and 32b are set to an interlocked synchronized state by the connecting handle 32L, so the three-way valve 32b connects the new oil discharge joint 31b and the device new oil discharge pipe 35 via the metering pipe 30 and closes the new oil tank discharge pipe 36. When the new oil pump 3p is operated in this state, the new oil L11 in the new oil tank 3t is sucked into the new oil pump 3p via the new oil tank suction pipe 33, the three-way valve 32a, and the new oil suction main pipe 31a, and then discharged from the new oil discharge main pipe 31b, and is supplied to the automobile engine, which is the operating device 5, via the fuel gun 37G. At this time, by setting the batch meter 30M provided in the measuring pipe 30, the desired amount of fuel can be measured and supplied.

[0077] [5. Supply of different new oil] Next, a case will be described in which fresh oil L12 is supplied to the operating device 5 in another vehicle T in response to a user's request. In this case, as shown in Figure 8-4, the operating method is to supply oil by connecting the coupler element C31 provided at the end of the new oil common pipe 37 to the coupler element C32 provided on the oil drain cock side of the operating device 5, which is the automobile engine. Next, as shown in Figures 8-4 and 7(a), by rotating the connecting handle 32L toward the "Discharge" label Lb, the three-way valve 32a is switched to a state in which the new oil suction joint 31a and the new oil tank suction pipe 33 are connected and the external new oil tank suction pipe 34 is closed. At this time, the three-way valves 32a and 32b are set to an interlocked synchronized state by the connecting handle 32L, so the three-way valve 32b connects the new oil discharge joint 31b and the device new oil discharge pipe 35 via the metering pipe 30 and closes the new oil tank discharge pipe 36. When the new oil pump 3p is operated in this state, the new oil L11 in the new oil tank 3t is sucked into the new oil pump 3p via the new oil tank suction pipe 33, the three-way valve 32a, and the new oil suction main pipe 31a, and then discharged from the new oil discharge main pipe 31b, and is supplied to the automobile engine, which is the operating device 5, via the fuel gun 37G. At this time, by setting the batch meter 30M provided in the measuring pipe 30, the desired amount of fuel can be measured and supplied. [Example]

[0078] Next, a third embodiment, which is a modified example of the oil change device 1 for the waste oil L0 and new oil L1 shown in the first embodiment, will be described with reference to Figures 9 to 11. Note that the oil change device 1 shown in the third embodiment has the same basic configuration as the device shown in the first embodiment, and therefore, only the configuration related to the differences will be described below. Specifically, this difference is a simplification of the configuration of the new oil system working fluid treatment device 3 in the oil change device 1 shown in Example 1, and the piping around the new oil pump 3p has been changed from the configuration shown in Figure 3-2 to a configuration as shown in Figure 10 that does not use a metering pipe 30, similar to the waste oil pump 2p in the waste oil system working fluid treatment device 2 shown in Figure 3-1.

[0079] The configuration and piping structure of the new oil system hydraulic fluid treatment device 3 will be described below with reference to Figs. 9-1 to 9-4, 10, and 3-1. 、 This will be specifically described with reference to FIGS. 11-1 to 11-4. First, as shown in Figure 10, the new oil pump 3p is equipped with a new oil suction pipe 31a and a new oil discharge pipe 31b, and the new oil suction pipe 31a is connected to a new oil tank suction pipe 33 and an external new oil tank suction pipe 34 via a three-way valve 32a in a manner that allows for freely switching between circuits. On the other hand, a new oil discharge pipe 35 for the device and a new oil tank discharge pipe 36 are connected to the new oil discharge main pipe 31b via a three-way valve 32b in a manner that allows for freely switching between circuits.

[0080] In addition, the new oil discharge pipe 35 of the device in the new oil system hydraulic fluid treatment device 3 and the external new oil tank suction pipe 34 merge at the terminal side to form a single pipeline as a new oil shared pipe 37, and the new oil discharge main pipe 31b is configured to be connected to the new oil tank discharge pipe 36 side and the new oil shared pipe 37 side via a three-way valve 32b so that the circuit can be freely switched. In the third embodiment, the new oil discharge pipe 35 is provided with a batch meter 35M that automatically stops the supply of new oil L1 when a desired amount of new oil L1 has been supplied.

[0081] Furthermore, the three-way valves 32a and 32b are of the same structure (shape and flow path within the valve), which is a so-called three-way cock L-port type. These are arranged one above the other, with the three-way valve 22b directly attached to the waste oil discharge pipe 21b and the three-way valve 22a directly attached to the waste oil suction pipe 21a. The switching levers 32bL and 32aL provided on each are integrated by a connecting handle 32L, making it possible to operate the three-way valves 32b and 32a in a synchronized manner.

[0082] The oil change device 1, which is a hydraulic fluid reservoir device of the present invention shown in this third embodiment, has the above-described configuration as an example and is used as follows. [1. Preparation for the first train] In the initial preparation state, both the waste oil tank 2t and the new oil tank 3t in the oil change device 1 are empty. Meanwhile, in order to obtain compressed air to drive the waste oil pump 2p and the new oil pump 3p, an external air hose or the like is connected to the air joint 151 in the drive air system device 15. Incidentally, in automobile repair shops and the like, air tools are generally used for various maintenance and inspections, and air compressors, air hoses, etc. are always on hand.

[0083] [2. New Oil Reserve] Next, in this state, new oil L1 is filled into the new oil tank 3t of the oil change device 1, and this new oil L1 is generally stored in an external new oil tank 3T provided in a maintenance workshop 100 or the like. In this embodiment, a drum DC is used as the external new oil tank 3T, and the operation is performed by simply connecting a nozzle-shaped suction and discharge pipe 18 to the new oil common pipe 37 with a one-touch coupler, as shown in Figure 11-1, and inserting the tip of the suction and discharge pipe 18 into the external new oil tank 3T.

[0084] After connecting the new oil common pipe 37 and the external new oil tank 3T in this way, first operate the new oil pump 3p in the new oil system hydraulic fluid treatment device 3. Specifically, the air cock 152 on the new oil tank 3t side in the drive air system device 15 is opened to drive the new oil pump 3p, and new oil L1 is supplied (filled) from the external new oil tank 3T to the new oil tank 3t. 11-1 and 10(a), the three-way valve 32a in the new oil system hydraulic fluid treatment device 3 connects the external new oil tank suction pipe 34 to the new oil suction main pipe 31a and closes the new oil tank suction pipe 33, and the three-way valve 32b connects the new oil discharge main pipe 31b to the new oil tank discharge pipe 36 and closes the device new oil discharge pipe 35. As already mentioned, this operation itself is set in a linked state by the connecting handle 32L, so that by rotating the connecting handle 32L toward the "suction" label Lb, the two three-way valves 32a and 32b can be operated simultaneously.

[0085] When the circuit is set up in this way, new oil L1 is sucked into the new oil pump 3p through the new oil common pipe 37, the external new oil tank suction pipe 34, the three-way valve 32a, and the new oil suction main pipe 31a by the action of the new oil pump 3p, and then discharged from the new oil discharge main pipe 31b, passes through the three-way valve 32b, and the new oil tank discharge pipe 36, and is filled into the new oil tank 3t. The capacity of a 3-ton new oil tank is said to be capable of holding approximately 100 liters of new oil L1 (enough for about 25 passenger cars or about 4 large trucks), with a margin of around 120 liters of space. Furthermore, by dividing the new oil tank 3t into multiple sections, each section being equipped with a new oil tank discharge pipe 36 and a new oil tank suction pipe 33, and by making it possible to switch between these and three-way valves 32a, 32b, it becomes possible to select and supply new oil L1 according to the customer's preference from multiple types of new oil L1 of different grades, for example.

[0086] The new oil tank 3t can also be filled with new oil L1 using an external pump through a new oil filler port 3h formed on the top plate 115 at the top of the new oil tank 3t. This new oil filler port 3h is sealed with a cap 3c when not in use. An air breather 3b is formed on the top plate 115 at the top of the new oil tank 3t, and this is where air is supplied and discharged when new oil L1 is introduced into and removed from the new oil tank 3t.

[0087] [3. Waste oil collection] In this way, the oil change device 1, in which new oil L1 is reserved, recovers waste oil L0 from the automobile engine, which is the operating device 5, and the waste oil L0 in the operating device 5 is stored in the waste oil tank 2t in the waste oil-based operating fluid treatment device 2. That is, this work is performed by connecting the waste oil common pipe 27 and the suction and discharge pipe 18 by joining the coupler element C21 provided at the end of the waste oil common pipe 27 with the coupler element C22 provided on the nozzle-shaped suction and discharge pipe 18, as shown in Figure 11-2. Waste oil L0 flowing down from the engine drain cock is temporarily stored in a waste oil receiving tray DT. 11-2 and 3-1(b), by rotating the connecting handle 22L toward the "suction" label Lb, the three-way valves 22a and 22b are operated simultaneously, connecting the equipment waste oil suction pipe 23 to the waste oil suction main pipe 21a and closing the waste oil tank suction pipe 24, connecting the waste oil tank discharge pipe 25 to the waste oil discharge main pipe 21b and closing the external waste oil tank discharge pipe 26. By operating the waste oil pump 2p in this state, the waste oil L0 in the waste oil receiving tray DT is sucked into the waste oil pump 2p via the suction and discharge pipe 18, the shared waste oil pipe 27, the equipment waste oil suction pipe 23, the three-way valve 22a, and the waste oil suction main pipe 21a, and then discharged from the waste oil discharge main pipe 21b, passing through the three-way valve 22b and the waste oil tank discharge pipe 25 to be collected in the waste oil tank 2t. At this time, since the waste oil common pipe 27 is equipped with a strainer 28, foreign matter such as iron powder mixed in the waste oil L0 can be filtered out, and the waste oil pump 2p can be protected.

[0088] As shown in the imaginary circle in Figure 11-2, if a coupler element C22 is provided on the oil drain cock side of the automobile engine, which is the operating device 5, the coupler element C21 provided at the end of the waste oil common pipe 27 can be connected to the coupler element C22 with a single touch, and in this state the waste oil pump 2p can be operated to recover the waste oil L0 in the engine, which is the operating device 5, into the waste oil tank 2t. 1, an operation configuration can be adopted in which the oil change device 1 is placed directly under the engine of the vehicle T, and the waste oil L0 flowing down from the engine drain cock is received in the waste oil receiving pan 16, and the waste oil L0 is directly collected in the waste oil tank 2t through the inlet pipe 163. Similarly, an operation configuration can be adopted in which the waste oil L0 flowing down from the engine drain cock is temporarily collected in the waste oil tank 101T of the drain cart 101 used in the existing repair shop 100 described in the [Background Art] section, and the waste oil L0 is then collected in the waste oil tank 2t by the waste oil pump 2p. An air breather 2b is formed on the top plate 115 above the waste oil tank 2t, and air is supplied and discharged from here when the waste oil L0 is put into and taken out of the waste oil tank 2t.

[0089] [4. New oil supply] In this way, after engine oil etc. as waste oil L0 has been drained from the engine which is the actuating device 5, a portion of the new oil L1 already stored in the new oil tank 3t is supplied to the actuating device 5 from the new oil system actuating fluid treatment device 3. To do this, first, as shown in FIG. 11-3, coupler element C31 provided at the end of new oil common pipe 37 and coupler element C32 provided on fuel gun 37G are connected with a single touch. 11-3 and 10(b), by rotating the connecting handle 32L to the "Discharge" label side, the three-way valve 32a is switched to a state in which the new oil suction joint 31a and the new oil tank suction pipe 33 are connected and the external new oil tank suction pipe 34 is closed. At this time, the three-way valves 32a and 32b are set to an interlocked synchronized state by the connecting handle 32L, so the three-way valve 32b connects the new oil discharge joint 31b and the device new oil discharge pipe 35 and closes the new oil tank discharge pipe 36. When the new oil pump 3p is operated in this state, the new oil L1 in the new oil tank 3t is sucked into the new oil pump 3p via the new oil tank suction pipe 33, the three-way valve 32a, and the new oil suction main pipe 31a, and then discharged from the new oil discharge main pipe 31b, passes through the three-way valve 32b, the new oil discharge pipe 35 for the device, and the new oil common pipe 37, and is supplied from the fuel gun 37G to the automobile engine, which is the operating device 5. At this time, by setting a batch meter 35M provided midway in the new oil discharge pipe 35 for the equipment, it is possible to measure and supply a desired amount of oil. In addition, as shown in the imaginary circle in Figure 11-3, if a coupler element C32 is provided on the oil drain cock side of the automobile engine, which is the operating device 5, an operating form can also be adopted in which the coupler element C31 provided at the end of the new oil shared pipe 37 is connected to the coupler element C32 by a coupler to supply oil.

[0090] [5. External discharge of waste oil] When the above-mentioned series of operations of collecting the waste oil L0 and supplying the new oil L1 is repeated for several vehicles T, the amount of new oil L1 reserved in the new oil tank 3t decreases, while the waste oil tank 2t approaches a full tank of waste oil L0. In theory, both the waste oil tank 2t and the new oil tank 3t are never full, and the system will contain roughly half the total amount of oil in both tanks. This state can be visually observed from the outside using level gauges 29, 39 etc. provided near the side plates 113, 114 of the front plate 111.

[0091] When the waste oil L0 in the waste oil tank 2t becomes full, it is discharged to the outside. In this embodiment, a drum DC is used as the external waste oil tank 2T, and as shown in Figure 11-4, the suction and discharge pipe 18 is connected to the waste oil common pipe 27 with a one-touch coupler, and the tip of the suction and discharge pipe 18 is inserted into the external waste oil tank 2T. As shown in Figures 11-4 and 3-1(a), by rotating the connecting handle 22L toward the "discharge" label Lb, the three-way valves 22a and 22b are operated synchronously, so that the waste oil tank suction pipe 24 is connected to the waste oil suction main pipe 21a and the device waste oil suction pipe 23 is closed, and the external waste oil tank discharge pipe 26 is connected to the waste oil discharge main pipe 21b and the waste oil tank discharge pipe 25 is closed. By operating the waste oil pump 2p in this state, the waste oil L0 in the waste oil tank 2t is sucked into the waste oil pump 2p via the waste oil tank suction pipe 24, the three-way valve 22a, and the waste oil suction main pipe 21a, and then discharged from the waste oil discharge main pipe 21b, and collected in the external waste oil tank 2T via the three-way valve 22b, the external waste oil tank discharge pipe 26, the waste oil common pipe 27, and the suction and discharge pipe 18. At this time, the waste oil L0 can be used to backwash and remove foreign matter accumulated in the strainer 28. Eventually, both the waste oil tank 2t and the new oil tank 3t of the oil change device 1 will become empty, and at this stage the system will return to the new oil reserve state as already described, and oil changes and other operations will be carried out in the same manner. [Example]

[0092] In addition to the modifications shown in the third embodiment, the oil change device 1 of the present invention shown in the first embodiment can also be modified as described below within the scope of the technical concept of the present invention. Specifically, as shown in Figure 12, by removing the new oil-based hydraulic fluid treatment device 3 from the oil change device 1 shown in Figure 2-1, which is designed to treat waste oil L0 and new oil L1, the oil change device 1 can function as a waste oil recovery device that treats only waste oil L0. Furthermore, in this embodiment, the partition plate 117 has been removed, and the entire internal space of the device housing 11 is used as a large-capacity waste oil tank 2t. [Example]

[0093] Furthermore, modifications similar to those in the fourth embodiment can also be made to the oil change device 1 of the present invention shown in the second embodiment. Specifically, as shown in Figure 13, by removing one new oil-based hydraulic fluid treatment device 3R from the oil change device 1 that is designed to handle two types of new oil L1 shown in Figure 6-1 and by removing the partition plate 117, the oil change device 1 can function as a large-capacity new oil supply device that handles only one type of new oil L1. Note that the oil change device 1 shown in Figure 13 is equipped with a batch meter 30M that can measure flow rates in both the "discharge" and "suction" directions, so it can be used to handle new oil L1, but of course it can also be used to handle waste oil L0, for which the flow rate on the "discharge" side is not a major concern. [Example]

[0094] Furthermore, the oil change device 1 of the present invention shown in the third embodiment can be modified as follows within the scope of the technical concept of the present invention. First, as in the first and second embodiments, we will explain a configuration that can eliminate inefficient work such as an operator always staying attached to the oil change device 1, visually checking the level gauge 39 to prevent new oil L1 from overflowing from the new oil tank 3t, and stopping the new oil pump 3p before it becomes full, and an operator always keeping an eye on the level gauge 29 to prevent waste oil L0 from overflowing from the waste oil tank 2t, and stopping the waste oil pump 2p before it becomes full. Specifically, the system is configured to automatically control the amount of new oil L1 filled into the new oil tank 3t and the amount of waste oil L0 recovered into the waste oil tank 2t. As an example, as shown in Figure 14(a), by providing a preset metering setter 36M on the new oil tank discharge pipe 36, the amount of new oil filled into the new oil tank 3t can be set in advance, and when the set flow rate is reached, the metering setter 36M will automatically close, stopping the flow of new oil L1 from the new oil tank discharge pipe 36 and preventing overflow.

[0095] Similarly, as shown in Figure 14(b), by providing a preset metering setter 25M on the waste oil tank discharge pipe 25, the amount of waste oil to be collected into the waste oil tank 2t can be set in advance, and when the set flow rate is reached, the metering setter 25M will automatically close, stopping the flow of waste oil L0 from the waste oil tank discharge pipe 25 and preventing overflow. By adopting the above-described configuration, the worker does not need to be constantly attached to the oil change device 1, and can perform other tasks away from the oil change device 1 while the new oil tank 3t is being filled with new oil L1 and the waste oil tank 2t is being collected with waste oil L0.

[0096] Although not shown in the figure, by also equipping the external waste oil tank discharge pipe 26 with a device equivalent to the batch meter 35M, the waste oil-based hydraulic fluid treatment device 2 can also be made to automatically stop discharge when the desired amount of waste oil L0 has been discharged. [Example]

[0097] In addition, in the new oil system hydraulic fluid treatment device 3 shown in Figure 14(a), in addition to the batch meter 35M provided in the device's new oil discharge pipe 35, a new metering setter 36M is added to automatically control the amount of new oil filled into the new oil tank 3t.However, it is also possible to adopt a configuration in which the amount of new oil L1 filled into the new oil tank 3t and the amount of new oil L1 discharged from the new oil tank 3t can be pre-set using a single batch meter 35M without adding this metering setter 36M.

[0098] In other words, the configuration of the new oil system hydraulic fluid treatment device 3 shown in Figure 15 is a configuration that, compared to the new oil system hydraulic fluid treatment device 3 shown in Figures 11-1 to 11-4, enables the fixed quantity of new oil L1 to be discharged from the new oil tank 3t and the fixed quantity of new oil L1 to be filled into the new oil tank 3t using the existing batch meter 35M, without the need to install a new metering setter 36M. Specifically, in the new oil system hydraulic fluid treatment device 3 shown in Figs. 11-1 to 11-4, a three-way valve 32c is provided in the new oil discharge pipe 35 for the device at the next stage to the batch meter 35M. The flow path selected by this three-way valve 32c is either the latter half of the new oil discharge pipe 35 for the device, which joins with the new oil common pipe 37, or the new oil tank discharge pipe 36.

[0099] In addition, the flow path selected by the three-way valve 32b connected to the new oil discharge main pipe 31b is limited to the new oil discharge pipe 35 for the device, and when the connecting handle 32L is rotated toward the "discharge" label Lb side as shown in Figure 15(a), a flow path is formed that directly connects the new oil discharge main pipe 31b and the new oil discharge pipe 35 for the device, while when the connecting handle 32L is rotated toward the "suction" label Lb side as shown in Figure 15(b), a flow path is formed that connects the new oil discharge main pipe 31b and the new oil discharge pipe 35 for the device via the return line 38.

[0100] By adopting this configuration, when the connecting handle 32L and the switching lever 32cL are first rotated toward the "discharge" label Lb side as shown in Figure 15(a), the new oil L1 in the new oil tank 3t is sucked into the new oil pump 3p via the new oil tank suction pipe 33, the three-way valve 32a, and the new oil suction main pipe 31a, and then discharged from the new oil discharge main pipe 31b side, passes through the three-way valve 32b, reaches the new oil discharge pipe 35 for the device, and after the flow rate is measured by the batch meter 35M, is supplied to the operating device 5 via the three-way valve 32c and the new oil common pipe 37.

[0101] On the other hand, when the connecting handle 32L and the switching lever 32cL are rotated to the "Suction" label side as shown in Figure 15(b), the new oil L1 in the external new oil tank 3T is sucked into the new oil pump 3p via the new oil common pipe 37, the external new oil tank suction pipe 34, the three-way valve 32a, and the new oil suction main pipe 31a, and then discharged from the new oil discharge main pipe 31b, passes through the three-way valve 32b and the return pipe 38, reaches the equipment new oil discharge pipe 35, and after the flow rate is measured by the batch meter 35M, is filled into the new oil tank 3t via the three-way valve 32c and the new oil tank discharge pipe 36. When such a configuration is adopted, the new oil discharge main pipe 31b is connected to the new oil tank discharge pipe 36 via the three-way valves 32b and 32c.

[0102] In addition, in FIG. 15, the connecting handle 32L for synchronously operating the three-way valves 32a and 32b in conjunction with each other and the switching lever 32cL for operating the three-way valve 32c alone are shown as separate entities. 、 Three-way valve 32b and Three-way valve 32 c If the handles and levers are of the same type and the rotation axes of these handles and levers can be ensured to be on the same line using appropriate piping and brackets, the connecting handle 32L and the switching lever 32cL can be connected to operate the three-way valves 32a, 32b, and 32c in a synchronized manner. In this case, the three-way valves 32a, 32b, and 32c may be installed at any position, and may be installed either horizontally or vertically.

[0103] Furthermore, in the waste oil-based working fluid treatment device 2, even when a device equivalent to the batch meter 35M is provided in the external waste oil tank discharge pipe 26, by providing a device equivalent to the three-way valve 32c and the return pipe line 38, the waste oil-based working fluid treatment device 2 can automatically stop discharge when the desired amount of waste oil L0 has been discharged using only the device equivalent to the batch meter 35M, and can also automatically stop recovery when the desired amount of waste oil L0 has been recovered.

[0104] The modified examples shown in Figures 14 and 15 are modifications made to the oil change device 1 shown in Figures 9-1 to 9-4. However, by reviewing the routing of piping, etc., the number of parts has been further reduced, and the fixed amount of new oil L1 can be discharged from the new oil tank 3t and the fixed amount of new oil L1 can be filled into the new oil tank 3t. 、 The oil change device 1 shown in the first and second embodiments realizes a configuration that enables a fixed amount of waste oil L0 to be discharged from the waste oil tank 2t and a fixed amount of waste oil L0 to be recovered into the waste oil tank 2t.

[0105] [Other application examples] The hydraulic fluid reservoir device of the present invention can be applied to not only the engine oil described above, but also transmission oil, differential oil, oil for stationary compressors, and even oil components other than oils and fats, such as vehicle antifreeze.

[0106] Furthermore, for example, by removing the casters 12 and the waste oil receiving pan 16 and installing the oil change device 1 on the loading platform of a vehicle T, it becomes possible to take the device outside the company's own factory and perform oil changes.

[0107] As described above, by introducing the oil change device 1, which is a hydraulic fluid reservoir device of the present invention, the various devices provided in the repair shop 100 shown in Figure 16 become unnecessary. This makes it possible to reduce the energy consumed and CO2 emissions when manufacturing and disposing of these devices. Furthermore, in the repair shop 100 shown in FIG. 16, the high-pressure pump 107 experienced a loss of driving energy due to the flow resistance of the new oil piping 104N and the hose reel 108, but by introducing the oil change device 1 of the present invention, such energy loss can be minimized.

[0108] Furthermore, in the oil change device 1 shown in Examples 1 and 3, the waste oil type hydraulic fluid treatment device 2 and the new oil type hydraulic fluid treatment device 3 are completely isolated, so that waste oil L0 is not mixed into the new oil L1, and high-quality oil change work can be provided. Similarly, the oil change device 1 shown in Example 2 has two new oil hydraulic fluid treatment devices 3 completely isolated from each other, so different types of new oil L1 do not mix, and high-quality oil change work can be provided.

[0109] Furthermore, the oil change device 1 of the present invention can be immediately introduced in existing factories that do not have centralized oil supply and drainage equipment such as new oil piping 104N, waste oil piping 104D, discharge pump 102, final waste oil tank 105, and high-pressure pump 107, by simply providing an air supply compressor, etc., making it possible to build an oil change system with reduced initial costs. This makes it possible to avoid situations in which investment in oil change equipment cannot be recovered due to the recent rapid electrification of automobiles. [Explanation of symbols]

[0110] 1 Oil change device (hydraulic fluid reservoir device) 11 Device housing 111 Front plate 112 Back plate 113 Side Panel 114 Side Panel 115 Top Plate 116 Bottom plate 117 Partition 12 Caster 13 Handle 14 Hose hanger 15 Driving air system 151 Air Joint 152 Aircock 153 Regulator 16 Waste oil pan 161 Bread body 162 Extended Tray 163 Introductory tube 164 Receiving sleeve 17 Storage Tray 18 Intake and exhaust pipe 2 Waste oil hydraulic fluid treatment equipment 2b Air Breather 2t waste oil tank 2T external waste oil tank 2d Drain opening 2p Waste Oil Pump 21a Waste oil suction pipe 21b Waste oil discharge pipe 22a Three-way valve 22b Three-way valve 22aL switching lever 22bL switching lever 22L Connecting Handle 23 Equipment waste oil suction pipe 24 Waste oil tank suction pipe 25 Waste oil tank discharge pipe 25M Weighing setting device 26 External waste oil tank discharge pipe 27 Waste oil common pipe 28 Strainer 29 Level Gauge 3. New oil hydraulic fluid treatment equipment 3R New oil hydraulic fluid treatment equipment 3L New Oil Hydraulic Fluid Treatment Device 3b Air Breather 3c cap 3d drain opening 3h New oil filler 3t new oil tank 3T External new oil tank 3p New Oil Pump 30 Metering tube 30M Batch Meter 31a New oil suction base pipe 31b New oil discharge base pipe 32a Three-way valve 32b Three-way valve 32B bracket 32c Three-way valve 32aL switching lever 32bL switching lever 32cL switching lever 32L Connecting Handle 33 New oil tank suction pipe 34 External new oil tank suction pipe 35 Equipment new oil discharge pipe 35M Batch Meter 36 New oil tank discharge pipe 36M Weighing setting device 37 New oil common pipe 37G fuel gun 38 Return pipe 39 Level Gauge 5. Actuator C2 One-touch Coupler C21 Coupler Element C22 coupler element C3 One-touch coupler C31 coupler element C32 coupler element DC Drum DT Waste Oil Tray L0 Waste oil L1 New oil L11 New oil L12 New oil Lb Label N Notch S stopper T Vehicle (Truck) 100 Repair Shop 100L work lane 100L1 Work Lane 100L2 Work Lane 100L7 Work Lane 101 Drain Cart 101T Waste Oil Tank 102 Discharge pump 103 Suction hose (coupler) 104N New oil piping 104D Waste oil piping 105 Final waste oil tank 105B Alarm panel 105S Liquid Level Sensor 106 Oil storage 106B Alarm panel 106P Low-pressure pump 106S Lower Limit Level Sensor 106T New oil tank 107 High-pressure pump 108 Hose reel 108L Reel Bracket 109 Fuel Gun

Claims

1. A movable device that treats hydraulic fluid used to operate an operating device and can temporarily store the hydraulic fluid when replacing the hydraulic fluid, The apparatus includes one or more hydraulic fluid treatment devices for treating hydraulic fluid; The hydraulic fluid treatment device includes: a hydraulic fluid storage tank; an internal pipeline provided inside the hydraulic fluid storage tank; an external pipeline provided outside the hydraulic fluid storage tank; a pair of three-way valves for switching the connection state of the pipelines inside the tank and the pipelines outside the tank; a pump device for moving hydraulic fluid between the two three-way valves, The flow direction of the hydraulic fluid is switched by switching the three-way valve, The hydraulic fluid treatment device is configured by providing one or more new oil system hydraulic fluid treatment devices for new oil, or The hydraulic fluid treatment device is configured by combining the new oil-based hydraulic fluid treatment device with a waste oil-based hydraulic fluid treatment device for waste oil, The new oil system hydraulic fluid treatment device comprises a new oil tank as the hydraulic fluid storage tank, a new oil pump as the pump device, a new oil tank suction pipe and a new oil tank discharge pipe as the tank internal pipelines, and an external new oil tank suction pipe and a device new oil discharge pipe as the tank external pipelines, The new oil discharge pipe for the device and the external new oil tank suction pipe are joined at the terminal side to form a single common new oil pipe. The new oil pump has a new oil suction pipe and a new oil discharge pipe, The new oil suction pipe is connected to the external new oil tank suction pipe side and the new oil tank suction pipe side via one of the three-way valves in a freely switchable circuit. On the other hand, the new oil discharge pipe is connected to the new oil tank discharge pipe side and the new oil common pipe side via the other three-way valve so that the circuit can be switched freely. The hydraulic fluid reservoir device is characterized in that the flow direction within the new oil common pipe can be switched between suction and discharge by switching these three-way valves.

2. A movable device that treats hydraulic fluid used to operate an operating device and can temporarily store the hydraulic fluid when replacing the hydraulic fluid, The apparatus includes one or more hydraulic fluid treatment devices for treating hydraulic fluid; The hydraulic fluid treatment device includes: a hydraulic fluid storage tank; an internal pipeline provided inside the hydraulic fluid storage tank; an external pipeline provided outside the hydraulic fluid storage tank; a pair of three-way valves for switching the connection state of the pipelines inside the tank and the pipelines outside the tank; a pump device for moving hydraulic fluid between the two three-way valves, The flow direction of the hydraulic fluid is switched by switching the three-way valve, The hydraulic fluid treatment device is configured by providing one or more waste oil hydraulic fluid treatment devices for waste oil, or The hydraulic fluid treatment device is configured by combining the waste oil hydraulic fluid treatment device with a new oil hydraulic fluid treatment device for new oil, The waste oil hydraulic fluid treatment device comprises a waste oil tank as the hydraulic fluid storage tank, a waste oil pump as the pump device, a waste oil tank suction pipe and a waste oil tank discharge pipe as the tank internal pipelines, and an apparatus waste oil suction pipe and an external waste oil tank discharge pipe as the tank external pipelines, The waste oil suction pipe of the equipment and the external waste oil tank discharge pipe are joined at the terminal side to form a single pipe as a shared waste oil pipe, The waste oil pump comprises a waste oil suction pipe and a waste oil discharge pipe; This waste oil suction pipe is connected to the equipment waste oil suction pipe side and the waste oil tank suction pipe side via one of the three-way valves so that the circuit can be freely switched. The waste oil discharge main pipe is connected to the waste oil tank discharge pipe side and the waste oil common pipe side via the other three-way valve, so that the circuit can be freely switched. This hydraulic fluid reservoir device is characterized in that the flow direction within the waste oil common pipe can be switched between suction and discharge by switching these three-way valves.

3. A batch meter is provided between the new oil pump and the three-way valve, The hydraulic fluid reservoir device according to claim 1, characterized in that the batch meter is configured to be able to selectively measure the amount of new oil filled into the new oil tank or the amount of new oil supplied from the new oil tank depending on the switching of the three-way valve.

4. A batch meter is provided between the waste oil pump and the three-way valve, The hydraulic fluid reservoir device according to claim 2, characterized in that the batch meter is configured to be able to selectively measure the amount of waste oil recovered into the waste oil tank or the amount of waste oil discharged from the waste oil tank depending on the switching of the three-way valve.

5. 5. A hydraulic fluid reservoir device according to claim 1, wherein the three-way valves provided on the suction side and discharge side of the waste oil pump or the new oil pump are operated in synchronization with each other.

6. A hydraulic fluid reservoir device as described in any one of claims 1 to 5, characterized in that the waste oil shared pipe provided in the waste oil type hydraulic fluid treatment device or the new oil shared pipe provided in the new oil type hydraulic fluid treatment device has one coupler element of a one-touch coupler at its end.

7. A hydraulic fluid reservoir device according to any one of claims 1 to 6, characterized in that the waste oil tank or new oil tank is itself constructed as a strength member, and the waste oil pump or new oil pump is mounted on its upper surface.

8. 8. The hydraulic fluid reservoir device according to claim 7, wherein casters are attached to the vicinity of the underside of the waste oil tank or the new oil tank configured as the strength member.

9. A hydraulic fluid reservoir device according to any one of claims 1 to 8, characterized in that the terminal portion of the waste oil tank suction pipe or the new oil tank suction pipe of the waste oil tank or the new oil tank extends to near the bottom of the waste oil tank or the new oil tank, and a drain opening is provided at the bottom of the waste oil tank or the new oil tank directly below each terminal portion.

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