JPH1099800A - High-pressure washing machine - Google Patents

Abstract

(57) [Problem] To provide both a discharge flow rate and a discharge pressure of a high pressure washer. SOLUTION: The pump gun Pa, Pb connected to a driving source 4 absorbs water through a pressure regulating unloader valve ULH, UHL disposed in a flow path extending from the pump Pa, Pb, and a nozzle gun NLH,
This is a washing machine that discharges from NHL, and has a plurality of pumps Pa and Pb and a plurality of unloader valves ULH and UHL for a single drive source 4, and each pump Pa and Pb has a connection means Da and Db of a different system from the drive source 4. The pumps Pa and Pb and the driving source 4
The connection between the pumps Pa, Pb and the unloader valve extends from the pumps Pa, Pb to the unloader valve ULH, UHL in conjunction with the switching of the connection between the pumps Pa, Pb and the drive source 4. The flow paths are switched selectively or in combination.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to high-pressure water spraying for cleaning construction machines, agricultural machines, fish cages, pools and sewer pipes, laying cut of fresh concrete, peeling of wood, and dust spraying when dismantling buildings. Related to washing machine.

[0002]

2. Description of the Related Art A general high-pressure washing machine (hereinafter, abbreviated as a washing machine) has a pump and a drive source (a gasoline engine, an electric motor, or the like) in a frame, and the pump and the drive source are a belt drive. And the like. The water supplied from the water suction port is sent out as high-pressure water from the pump, and a pressure regulating unit (for example, an unloader valve with a pressure regulating function (hereinafter, abbreviated as an unloader valve) or a pressure regulating valve) for adjusting the water pressure, a discharge port , And water was discharged through a nozzle gun.
In this washer, the output of the drive source, the water absorption flow rate, and the maximum discharge pressure are uniquely determined from the balance between the purpose of use and the price, but the output of the drive source = water absorption flow rate (≒ discharge flow rate) × discharge pressure / Since pump efficiency × K (conversion coefficient), the specification differs depending on the combination of the discharge flow rate and the discharge pressure. For example, even if the output of the drive source is the same 10 PS, on the one hand, the discharge flow rate is 15 L / min., The maximum discharge pressure is 180 kgf / cm ² , on the other hand, the discharge flow rate is 30 L / min., The maximum discharge pressure is 90 kgf / cm ² , etc. It is. In these washing machines, since the discharge flow rate is fixed, the discharge pressure is adjusted by the pressure adjusting unit in the range of 0 to the maximum discharge pressure.

[0003] Further, the conventional washing machine places emphasis on arranging the above-mentioned parts (a driving source, a pump, a pressure regulating part, and a pipe connecting the parts) in a frame, and can be used and stored alone. It was basic.

[0004]

For example, the detergency of a washer can be expressed by the product of (1) the cleaning area per unit time, that is, the cleaning efficiency, and (2) the degree of dirt removal per unit area. Then, the cleaning efficiency relates to the discharge flow rate of the cleaning machine, and the degree of dirt removal relates to the discharge pressure of the cleaning machine. For this reason, in actual use, a cleaning machine with low cleaning efficiency with low discharge flow rate x high discharge pressure but good dirt removal performance, and a high discharge flow rate with low discharge pressure but high cleaning efficiency with high discharge efficiency x low discharge pressure Had to be used separately with a low washer. Furthermore, since the conventional washing machine has a fixed discharge flow rate, when it is desired to use a washing machine having a medium discharge flow rate and a medium discharge pressure,
There is an inconvenience that a new specification of a cleaning machine must be prepared separately from the above two types of cleaning machines.

As described above, while it is assumed that a single washing machine is used, it is often necessary to select and use a plurality of washing machines, and if necessary, a plurality of washing machines having the same specifications are used. Therefore, securing a storage space for storing the plurality of washing machines has been regarded as an important issue.

In view of the above, the discharge flow rate and the discharge pressure can both be adjusted in a single washing machine so that a single washing machine can cope with a plurality of operations. In addition to examining the device configuration of the washing machine that can be adjusted in conjunction with the pressure and the discharge pressure, and especially if it is necessary to use and store multiple washing machines at the same time, in order to improve the handling convenience, We decided to study the specifications of the machine frame.

[0007]

SUMMARY OF THE INVENTION A washing machine developed as a result of study is a washing machine which discharges water from a pump connected to a driving source from a nozzle gun by adjusting the pressure by a pressure adjusting section provided in a flow path extending from the pump. There are a plurality of pumps and pressure regulating units for a single drive source, each pump has a drive source and a connection system of a different system, and the connection between these pumps and the drive source is achieved by selectively connecting the connection unit. Or switch in combination,
A high-pressure washing machine that switches a pressure regulating unit by selectively or in combination with a flow path extending from the pump in conjunction with switching of connection between the pump and a drive source. An unloader valve with a pressure adjustment function interposed in series with the flow path or a pressure adjustment valve that branches the flow path to release the pressure can be used as the pressure adjustment section. The connection means includes a belt drive with a clutch, which is switched by a change lever or the like. The switching of the flow path uses a port switching valve or the like linked to the change lever.

For example, for one engine (drive source),
The pump Pa is always connected with the belt drive Da, and the pump P
b is connected by a belt drive Db with a clutch Tb, and the pump Pb is disengaged with the clutch Tb of the pump Pb released.
a is connected to the engine to form a flow path extending from the pump Pa to the unloader valve ULH (L: low discharge flow rate H: high discharge pressure, the same applies hereinafter), and the pump Pa is connected to the clutch Pa of the pump Pb. The pump Pa and the pump Pb are both connected to the engine, and a flow path extending from each of the pump Pa and the pump Pb to an unloader valve UHL (H: high discharge flow rate L: low discharge pressure, the same applies hereinafter) is formed. A washing machine for reconnecting the connection from the valve ULH to the unloader valve UHL can be mentioned as an example.

In the same type of washing machine as described above, there are a plurality of pressure regulating units for a single drive source and a pump, and the connection between the pump and the drive source is switched selectively or in combination with the connection means. A high-pressure washing machine may be used in which the pressure regulating unit is switched by selectively or in combination with the flow path extending from the pump in conjunction with the switching of the connection between the pump and the drive source. For example, one engine (drive source) and the pump Pa are connected by the belt drive Da with the clutch Ta and the belt drive Db with the clutch Tb, the belt drive Da is connected by the clutch Ta, and the belt drive Db is released by the clutch Tb. A flow path from the pump Pa to the unloader valve ULH is formed, and the belt drive Da is released by the clutch Ta.
Is connected by a clutch Tb so as to switch to a flow path from the pump Pa to the unloader valve UHL.

[0010] A plurality of flow paths each having a pressure adjusting section provided from a specific pump are formed, and the plurality of flow paths are selectively or combined in conjunction with switching of connection between the pump and a driving source. The units may be switched. For example, one engine
(Drive source), the pump Pa is always connected with the belt drive Da, and the pump Pb is connected to the belt drive Db with the clutch Tb.
In addition, a flow path extends from the pump Pa to each of the unloader valves ULH and UL1, and a flow path extends from the pump Pb to the unloader valve UL2. When the clutch Tb is released, the pump Pa connected to the engine moves to the unloader valve ULH. When the engine is connected to both the pumps Pa and Pb by connecting the clutch Tb, the flow path extending from the pump Pa is switched to the unloader valve UL1, and the flow path from the pump Pa to the unloader valve UL1 and the flow path extending from the pump Pb A washing machine using a flow path extending to the unloader valve UL2 can be given as an example.

The washing machine of the present invention can be selectively or combined with each connecting means between a plurality of pumps and a driving source, or by selectively or combinedly switching a plurality of connecting means between a single pump and a driving source. The discharge flow rate is increased or decreased, and the discharge pressure is increased or decreased by switching the pressure regulating section by selectively or in combination with the flow path extending from the pump in conjunction with the switching of the connection. The safe use range (high discharge flow rate x low discharge pressure or low discharge flow rate x
(High discharge pressure). Moreover, the adjustment is
By linking the switching of the connection means, ie, the switching of the pump, and the switching of the flow path, ie, the switching of the pressure regulating section, by a change lever or the like, dangerous high discharge flow rate × high discharge pressure does not occur.

[0012] Further, when engaging projections are provided at two or more places on the upper surface of the frame of the washing machine, and engagement fitting portions are provided at positions corresponding to the engaging projections on the lower surface of the frame, and the washing machine is stacked vertically. When the pair of engagement projections and the engagement fitting portions are engaged with each other and the washing machine of each layer is made horizontal, a plurality of engagement protrusions are engaged with the engagement fitting portions. The washing machine can be stacked horizontally and stably.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the appearance of the washing machine of this embodiment, FIG. 2 is a front view thereof, and FIG. 3 is a pump Pa, Pb from the water suction port 1 of the washing machine of this embodiment, and an unloader valve serving as a pressure adjusting section. UHL, ULH, and outlet 2
FIG. 2 is a configuration diagram showing a flow path leading to the first embodiment. In the washing machine of the present embodiment, the discharge flow rate is adjusted by switching the change lever 3 by combining the pumps Pa and Pb, and the discharge pressure can be adjusted from 0 to the maximum value at the unloader valves UHL and ULH.

The arrangement and configuration of each part of the washing machine of this embodiment will be described with reference to FIGS. In addition to the washing machine engine 4, pumps Pa and Pb, unloader valves UHL and ULH, water intake port 1, discharge port 2, spill port 5, pressure gauge 6, and other hoses (not shown) that constitute a flow path. The main parts are sandwiched between a U-shaped front frame 7 and a rear frame 8 standing up and down, and loop-shaped hooks 9 and 10 are provided at the upper edges of the frames 7 and 8, respectively. The lower edge of each of the frames 7, 8 is provided with an elongated hole (see FIG. 6 or FIG. 7) to be paired with the hooks 9, 10. A pair of left and right wheels 11 is disposed near the rear frame 8, and a handle 12 extending from the rear frame 8 is provided.
The stand 13 protruding downward from the front frame 7 can be floated while the washer is lightly pressed to move the washer.

The engine 4 and the pump Pa are always connected by a belt drive Da, the engine and the pump Pb are connected by a belt drive Db, and the tension clutch Tb
Can be connected and disconnected freely. The change lever 3 operates the tension clutch Tb via the link 14 and also operates the port switching valve 15 for switching the flow path from the pump Pa between the unloader valve ULH and the unloader valve UHL. Water is supplied to the tank 16 outside the washing machine (Fig. 1
And not shown in FIG. 2, see FIG. 3), through the water intake port 1, and through hoses constituting a flow path, for example, a pump P
a, Nozzle gun NLH from discharge port 2 through unloader valve ULH (L: low discharge flow rate x H: high discharge pressure, the same applies hereinafter)
It is led to and discharged. The flow path is provided with a pressure gauge 6 for monitoring the discharge pressure, an air discharge valve 17 for releasing air from the flow path at the start of water absorption, and a spill port 5 for discharging excess water from the flow path. I have.

Next, the switching of the discharge flow rate will be described with reference to the configuration diagram of this embodiment (FIG. 3). In this example, the unloader valve ULH corresponds to low discharge flow rate × high discharge pressure, and the unloader valve UHL corresponds to high discharge flow rate × low discharge pressure. In the case of low discharge flow rate × high discharge pressure, the engine 4 and the pump Pa are connected, and the tension clutch Tb is operated by the change lever 3 to disconnect the pump Pb from the engine 4. Therefore, only the flow path from the water intake port 1 through the pump Pa is controlled by the port switching valve 15 to the unloader valve ULH.
Is sent to the discharge port 2 through the check valve 18. The discharge port 2 is provided with a nozzle gun NLH suitable for low discharge flow rate × high discharge pressure. FIG. 4 (corresponding to FIG. 3 in which the relevant portion is extracted) shows an example in which the pressure regulator is constituted by pressure regulators CLH and UHL instead of the unloader valves ULH and UHL.

When the change lever 3 is switched, the tension clutch Tb operates to connect the engine 4 and the pump Pb, and the engine 4 is connected to both the pump Pa and the pump Pb. At the same time, the change lever 3 switches the port switching valve 15 to connect the pump Pa to the unloader valve UHL. In this way, the flow path from the water inlet 1 through the pump Pa and the flow path from the water inlet 1 through the pump Pb are both guided to the unloader valve UHL, and send water to the discharge port 2 through the check valve 18. Nozzle gun NLH
Nozzle gun NHL (for high discharge flow rate x low discharge pressure, same hereafter)
To be replaced.

In this embodiment, a pump Pa and an unloader valve UL are used.
From H, a flow path of low discharge flow rate × high discharge pressure is connected to pumps Pa,
The discharge flow rate is increased by using two Pb units at the same time, and at the same time, the flow path extending from the pump Pa is switched from the unloader valve UHL to the unloader valve UHL to form a flow path of high discharge flow rate × low discharge pressure. In addition, since the selection or combination of the flow paths is realized by the change lever 3, (1) connection / disconnection between the engine 4 and the pump Pb and (2) operation of the port switching valve 15 are realized in a linked manner. The discharge pressure and the discharge flow rate can be safely and reliably adjusted without passing through a high discharge flow rate and a high discharge pressure. The nozzle gun NLH
There is an off-the-shelf nozzle gun that can switch between the nozzle guns NHL and NHL by using a single unit. If such a nozzle gun with a switching function is used, there is no need to change the nozzle guns NLH and NHL.

FIG. 5 is a side view corresponding to FIG. 1 showing a state in which the washing machine of this embodiment is vertically stacked, FIG. 6 is an enlarged cross-sectional view taken along the arrow A in FIG. 5, and FIG. FIG. As described above, the washing machine of this example is provided with a hook 9 at the upper edge of the front frame 7, a hook 10 at the upper edge of the rear frame 8, and a pair of elongated holes 19 and 20 at each lower edge. As shown in FIGS. 5 to 7, the hook 9 and the long hole 19 and the hook 10 and the long hole 20 are fitted to each other, and the washing machines of the same specifications are used and stored without any displacement. it can. As a result, the usability of the washing machine and the securing of space for storage are facilitated, and the convenience is improved.

Next, another embodiment will be described.
FIG. 8 shows that the engine 4 and the pump Pa are connected by belt drives Da and Db having different reduction ratios, and the change lever 3 is operated to connect one of the belt drives Da and Db and extend from the pump Pa by switching to release the other. FIG. 4 is a configuration diagram corresponding to FIG. 3 of an example in which a connection destination of a flow path is switched between unloader valves ULH and UHL. Both belt drives Da and Db have tension clutches Ta and Tb, and either of them works by switching the change lever 3, and the pump Pa is connected to the engine 4 by the belt drive Da (high reduction ratio) or the belt drive Db (reduction speed ratio). It is supposed to. In this example, the pump Pa
Is controlled by switching the belt drives Da and Db to switch the discharge flow rate.

When the engine 4 and the pump Pa are connected by the belt drive Da, the pump Pa has a low discharge flow rate, and the flow path extending from the pump Pa is connected to the unloader valve ULH. When the change lever 3 is switched, the pump Pa is connected to the engine 4 by the belt drive Db and has a high discharge flow rate.
Reconnect the flow path extending from a to the unloader valve UHL. This example reduces the number of pumps and is suitable for a relatively small washer.

FIG. 9 shows that the flow path extending from the pump Pa is connected to the unloader valve ULH and the flow path extending from the pump Pb, while the portion for switching between the pump Pa and the pump Pb by operating the change lever 3 is the same as in the example of FIG. FIG. 4 is a diagram corresponding to FIG. 3, in which the port switching valve 15 is omitted by fixing the connection destination to the unloader valve UHL and adjusting the outputs of both unloader valves ULH and UHL at the discharge port 2. The belt drive Da always connects the engine 4 and the pump Pa, and the belt drive Db with the tension clutch Tb connects and disconnects the engine 4 and the pump Pb by operating the change lever 3. In this example, only the pump Pa is used when the discharge flow rate is low, and the discharge flow rate is adjusted by using both the pumps Pa and Pb when the discharge flow rate is high.

The specifications of the unloader valves ULH and UHL may be the same, but in this example, different specifications are used. First, when the connection by the belt drive Db is disconnected by the tension clutch Tb and only the pump Pa is connected to the engine 4, the flow path extending from the pump Pa guides water to the discharge port 2 via the unloader valve ULH. When the tension clutch Tb is operated by operating the change lever 3 to connect the engine 4 to the pump Pb, the flow path extending from the pump Pb in addition to the flow path extending from the pump Pa passes to the discharge port 2 via the unloader valve UHL. It leads to water and the flow increases. In this example, the discharge flow rate is adjusted by adjusting the number of flow paths.

FIG. 10 shows that the pump Pa and the pump Pb are switched by operating the change lever 3 in the same manner as in the example of FIG. 3, but the pump Pa has an unloader valve ULH and an unloader valve UL1 (L: low discharge flow rate × L: (Low discharge pressure, the same applies hereinafter) via a port switching valve 15, and a pump Pb is provided with a flow path connecting an unloader valve UL2 of the same specification as the unloader valve UL1 to increase the discharge flow rate. FIG. 4 is a diagram corresponding to FIG. 3 of an example in which the output of the unloader valve UL1 and the output of the unloader valve UL2 are matched at the discharge port 2. The change lever 3 operates a port switching valve 15 for switching a connection destination of a flow path extending from the pump Pa between the unloader valve ULH and the unloader valve UL1 in conjunction with connection and disconnection of the engine 4 and the pump Pb. Except that the unloader valve UL1 and the unloader valve UL2 of the same specification are in parallel, the pump Pa
Similar to the example of FIG. 3 in which the flow path from the pump is switched, but when the pumps Pa and Pb are used together, different unloader valves UL
By allocating L1 and UL2, the discharge flow rate can be increased as compared with the example of FIG.

The specifications of the unloader valves ULH, UL1, UL2, and the pumps Pa, Pb may be different from each other. In this embodiment, the unloader valve UL1, the unloader valve UL2, and the pumps Pa, Pb have the same specification. First, when the belt drive Db is disconnected by the tension clutch Tb and only the pump Pa is connected to the engine 4, the flow path extending from the pump Pa is connected to the unloader valve ULH.
The water is guided to the discharge port 2 through When the tension clutch Tb operates by operating the change lever 3 to connect the engine 4 to the pump Pb, the flow path extending from the pump Pa is switched to the unloader valve UL1, and the flow path extending from the pump Pb is moved together with the unloader valve UL2. Discharge port 2
To lead the water. Unloader valve UL1, UL2
Although each of them has a low discharge flow rate, a high discharge flow rate is realized by combining them. In this example, the cost can be reduced by using an inexpensive unloader valve having a low discharge flow rate and a low discharge pressure.

FIG. 11 shows that the engine 4 and the pump Pa are connected by belt drives Da and Db having different reduction ratios, and one of the belt drives Da and Db is connected by operating the change lever 3 and the pump Pa is switched by releasing the other. FIG. 4 is a configuration diagram corresponding to FIG. 3 of an example in which a connection destination of a flow path extending from the unloader valve ULH and a parallel flow path of the unloader valves UL1 and UL2 are switched. The switching of the pump Pa is equivalent to FIG. 8, and the switching between the unloader valve UHL and the parallel flow paths of UL1 and UL2 is equivalent to FIG. Since the number of pumps can be reduced and a configuration suitable for a relatively small washing machine can be used together with an unloader valve of the same specification, the cost as a washing machine can be suppressed.

FIG. 12 shows a pump P constantly connected to the engine.
a, a pump P that is connected to and released from the engine 4 by the action of the tension clutches Tb and Tc by switching the change lever 3
b, the flow paths extending from the respective pumps Pc are integrated, and the integrated flow paths in the port switching valve 15 are unloaded with the unloader valves ULH, UMM (M: medium discharge flow rate x M: medium discharge pressure, the same applies hereinafter),
FIG. 4 is a configuration diagram corresponding to FIG. 3 of an example in which connection is switched to one of UHL. That is, in the washing machine of this example, the change lever 3 is switched in three stages, only the pump Pa works, and a low discharge flow rate × high discharge pressure constituting a flow path extending from the port switching valve 15 to the unloader valve ULH, and the pump Pa, Pb acts to form a flow path extending from the port switching valve 15 to the unloader valve UMM, and a medium discharge flow rate × medium discharge pressure and a pump Pa,
Pc works and unloader valve UHL from port switching valve 15
, A high discharge flow rate and a low discharge pressure that constitute a flow path extending to the flow path can be selected. In addition, with the switching of the change lever 3, a nozzle gun NLH, a nozzle gun NMM,
The nozzle gun NHL may be reconnected, or a ready-made nozzle gun having a switching function may be used.

FIG. 13 shows that the engine 4 and the pump Pa are connected by belt drives Da, Db, Dc having different reduction ratios, and the belt drives Da, Db, Dc are operated by operating the change lever 3.
FIG. 4 is a configuration diagram corresponding to FIG. 3 showing an example in which the connection destination of the flow path extending from the pump Pa is switched between the unloader valves ULH, UMM, and UHL by switching only one of the above and connecting the other. The switching of the pump Pa is equivalent to FIG. 8, and the switching of the unloader valves ULH, UMM, UHL is equivalent to FIG. With a configuration in which the selection range of the discharge flow rate is increased without increasing the number of pumps, the range of the combination of the discharge flow rate and the discharge pressure is widened, but the switching of the belt drives Da, Db, Dc and the operation of the port switching valve 15 are performed. Are linked by the change lever 3, there is no danger of dangerous high discharge flow rate × high discharge pressure, and the discharge flow rate and discharge pressure can be adjusted safely and reliably.

[0029]

According to the washing machine of the present invention, both the discharge flow rate and the discharge pressure can be adjusted in a single washing machine, so that a single washing machine can cope with a plurality of operations. In other words, in the work where a plurality of units had to be aligned in accordance with the discharge flow rate and the discharge pressure so far, it means that the number of the washer of the present invention may be one or less than before, This has the effect of reducing the introduction cost for the washing machine.

Of course, since both the discharge flow rate and the discharge pressure can be adjusted in a single washing machine, the usability is improved, and the switching between the engine and the pump is performed so that a dangerous combination of high discharge flow rate and high discharge pressure does not occur. Since the selection of the flow path is linked with the flow path, it is possible to provide high reliability that can be used with security.

In addition, the washing machine of the present invention is provided with a hook and a long hole, so that a plurality of washing machines can be simultaneously used and stored in a stacked form, if necessary, so that washing can be performed. The handling of the machine has been greatly improved.
In particular, the fact that it can be stably stacked during storage can be said to be a great effect in Japan, which is subject to restrictions on land use.

[Brief description of the drawings]

FIG. 1 is a side view showing the appearance of a washing machine of the present embodiment.

FIG. 2 is a front view of the same.

FIG. 3 is a configuration diagram showing a flow path from a water suction port to a pump, an unloader valve, and a discharge port in the washing machine.

FIG. 4 is a diagram corresponding to FIG. 3 in which a relevant portion of an example in which a pressure regulating valve is used instead of the unloader valve is extracted.

FIG. 5 is a view showing a state in which the washing machine of this example is vertically stacked.
It is an equivalent side view.

FIG. 6 is an enlarged cross-sectional view as viewed from an arrow A in FIG.

FIG. 7 is an enlarged cross-sectional view as seen from the arrow B in FIG. 5;

FIG. 8 is a configuration diagram corresponding to FIG. 3, showing another example of the present invention.

FIG. 9 is a configuration diagram corresponding to FIG. 3, showing another example of the present invention.

FIG. 10 is a configuration diagram corresponding to FIG. 3, showing another example of the present invention.

FIG. 11 is a configuration diagram corresponding to FIG. 3, showing another example of the present invention.

FIG. 12 is a configuration diagram corresponding to FIG. 3, showing another example of the present invention.

FIG. 13 is a configuration diagram corresponding to FIG. 3, showing another example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water suction port 2 Discharge port 3 Change lever 4 Engine 7 Front frame 8 Rear frame 9 Front hook 10 Rear hook 15 Port switching valve 16 Tank 19 Slot in front 20 Slot in back Pa Pump Pb Pump Pc Pump Da Belt drive Db belt drive Dc belt drive Ta tension clutch Tb tension clutch Tc tension clutch ULH unloader valve UMM unloader valve UHL unloader valve CLH pressure valve CHL pressure valve NLH nozzle gun NMM nozzle gun NHH nozzle gun

Claims (4)

[Claims] 1. A washing machine for discharging water from a nozzle gun by adjusting the pressure of water absorbed by a pump connected to a driving source by a pressure regulating unit provided in a flow path extending from the pump, the pump being provided for a single driving source. And each of the pumps has a drive source and a connection means of a different system, and the connection between the pump and the drive source is selectively or in combination with the connection means. A high-pressure washing machine characterized in that a pressure regulating unit is switched by selectively or in combination with a flow path extending from a pump in conjunction with switching of connection with the pressure switch. 2. A washing machine for discharging water from a nozzle gun by controlling the pressure of water absorbed by a pump connected to a driving source by a pressure regulating unit provided in a flow path extending from the pump. The pump has a plurality of different connection means, and the connection between the pump and the drive source is selectively or in combination with the connection means, and the connection between the pump and the drive source is changed. A high-pressure washing machine characterized in that a pressure regulating section is switched by selectively or in combination with a flow path extending from a pump in conjunction with switching. 3. A plurality of flow paths each having a pressure adjusting section provided from a specific pump, and the plurality of flow paths are selectively or combined in conjunction with switching of connection between a pump and a drive source. 3. The pressure adjusting unit is switched.
High pressure washer as described. 4. A washing machine for discharging water from a nozzle gun by adjusting the pressure of a pump connected to a driving source by a pressure adjusting section provided in a flow path extending from the pump, and discharging the water to two or more locations on the upper surface of the frame. An engagement projection is provided at a position corresponding to the engagement projection on the lower surface of the frame, and when the washing machines are stacked in the upper and lower stages, the engagement projection and the engagement engagement part that form a pair engage. A high-pressure washing machine characterized in that the washing machine for each layer is horizontal.