JP6991117B2 - Riding mower - Google Patents

Description

The present invention relates to a riding-type mower including a grass collecting container that is detachably supported with respect to a traveling machine, and a plurality of hydraulic cylinders that raise and lower the grass collecting container and change its posture.

Conventionally, the following techniques have been used in this type of riding mower.
That is, the weed collection container supported at the rear end of the traveling machine was configured to perform an elevating operation and a mowing discharge operation by using a plurality of hydraulic cylinders of a lift cylinder and a dump cylinder (). For example, see Patent Document 1).

JP-A-2002-101722 (see paragraph numbers 0024, 0025, FIGS. 1 and 3).

The passenger-type mower described in Patent Document 1 is equipped with a plurality of hydraulic cylinders on the grass collecting container side in order to raise and lower the grass collecting container and to discharge the grass.
A hydraulic pump and a control valve, which are sources of pressure oil for these hydraulic cylinders, are arranged on the traveling machine body side. Therefore, in order to attach / detach the grass collecting container to / from the traveling machine, it is necessary to provide a detachable coupler or the like in the middle of piping from the pressure oil supply source on the traveling machine side to the hydraulic cylinder to the traveling machine side. ..
Although not specified in Patent Document 1, if a plurality of hydraulic cylinders are provided on the grass collecting container side, pipes for supply and discharge are required according to the number of each hydraulic cylinder. Detachable couplers will be provided for pipes that are twice as many as the number of hydraulic cylinders used.
With this structure, when the grass collection container is attached / detached, it is necessary to perform connection / disconnection operations for all the attachment / detachment couplers provided in each pipe. In addition, it takes a considerable amount of effort, and there is room for improvement in this respect.

The present invention is intended to reduce the number of attachment / detachment of pressure oil supply / discharge pipes to the hydraulic cylinder on the grass collection container side so that the grass collection container can be attached / detached with a simple operation.

The passenger-type mower in the present invention includes a mower device provided in the lower part of the traveling machine, a grass collecting container that is detachably supported by the traveling machine, and a plurality of the grass collecting containers that are raised and lowered and changed in posture. A passenger-type mower equipped with a plurality of hydraulic cylinders, wherein a plurality of the hydraulic pressures are provided in a pressure oil supply / discharge path from a pressure oil supply source mounted on the traveling machine side to a plurality of the hydraulic cylinders. A solenoid valve for supplying and discharging hydraulic pressure to the cylinder is provided, and a detachable coupler capable of connecting and disconnecting the pressure oil supply and discharge path is provided between the pressure oil supply source and the solenoid valve. However, the holder device is supported by the traveling machine body via the holder device, and the holder device is configured so that the solenoid valve can be attached to and detached from the traveling machine body.

According to the present invention, a detachable coupler that can connect and disconnect the pressure oil supply / discharge path is provided between the pressure oil supply source and the solenoid valve, and pressure oil supply / discharge to the hydraulic cylinder on the grass collecting container side is provided. The solenoid valve of the above is supported by the traveling machine body via the holder device, and the solenoid valve is also configured so that it can be attached to and detached from the traveling machine body.
As described above, the solenoid valve can be attached to and detached from the traveling machine via the holder device, and the hydraulic oil supply path can also be attached and detached using the coupler, so that the grass collecting container can be attached to and detached from the traveling machine. When operating, the pressure oil supply / discharge path to the hydraulic cylinder can also be connected and disconnected relatively easily.
At this time, since the solenoid valve is attached and detached together with the grass collecting container, it is not necessary to connect or disconnect the pressure oil supply / discharge path between the solenoid valve and each hydraulic cylinder. A detachable coupler that can connect and disconnect the pressure oil supply / discharge path is required between the pressure oil supply source and the solenoid valve. All you have to do is install two pipes for discharge. In other words, the supply and discharge of pressure oil to each of the plurality of hydraulic cylinders is performed on the downstream side of the solenoid valve when viewed from the pressure oil supply source, so that it is not necessary on the upstream side of the solenoid valve. It is only necessary to provide two pipes for the purpose, and the number of couplers used can be reduced.
Therefore, in the flow path from the pressure oil supply source to the solenoid valve, only two pipes capable of supplying and discharging a flow rate corresponding to the total amount of pressure oil supplied and discharged on the downstream side of the solenoid valve are provided. The detachable coupler only needs to be able to attach and detach these two pipes, so there is an advantage that the number of couplers used and the number of steps for attachment and detachment can be reduced.

In the above configuration, it is preferable that the traveling machine body is provided with a lops erected at the rear end portion, the grass collecting container is detachably supported with respect to the lops, and the holder device is provided at the lops. Is.

According to this configuration, in a traveling machine equipped with a lopus, the lopus can be used as a support means for a solenoid valve by providing a holder device on the lops.

In the above configuration, it is preferable that the holder device is provided with a valve support mechanism for supporting the solenoid valve and a cover body for covering the solenoid valve and the pressure oil supply / discharge path.

According to this configuration, the electromagnetic valve can be supported by the valve support mechanism of the holder device, and the pressure oil supply / discharge path can also be protected by the cover body of the holder device.

In the above configuration, the valve support mechanism has a support base member provided on the traveling machine side, a mounting portion provided on the solenoid valve, and the above-mentioned mounting portion mounted on the support base member. Horizontal positioning means that can regulate and deregulate the horizontal position movement of the previously described mounting part with respect to the support base member, and vertical position regulation that can regulate and deregulate the vertical movement of the previously described mounting portion with respect to the support base member. It is preferable that the means and means are provided.

According to this configuration, the valve support mechanism is provided with a mounting structure consisting of a support base member and a mounting portion, and a vertical and horizontal position restricting structure by a horizontal positioning means and a vertical position regulating means. Therefore, it is possible to reliably support and regulate the position of the solenoid valve.

In the above configuration, the horizontal positioning means includes a plurality of engaging holes formed in the support base member and a plurality of locking pins formed in the above-mentioned mounting portion, and the plurality of locking pins are provided. It is preferable that the engagement holes are engaged with each other so as to prevent the horizontal movement and the relative rotation of the above-mentioned mounting portion with respect to the support base member.

According to this configuration, a simple structure consisting of a plurality of engaging holes formed in the support base member and a plurality of locking pins formed in the mounting portion allows the mounting portion to move horizontally with respect to the support base member. A horizontal positioning means that prevents relative rotation can be obtained.

In the above configuration, it is preferable that the plurality of locking pins are composed of a combination of a long locking pin that is long in the vertical direction and a short locking pin that is short in the vertical direction.

According to this configuration, in the horizontal positioning means, since it is composed of a combination of a long locking pin and a short locking pin, the operation of inserting a plurality of locking pins into a plurality of engaging holes can be performed from the longest side. It is easy to do it in order.

In the above configuration, it is preferable that the vertical position regulating means is configured by a beta pin that can be inserted and removed from the locking pin.

According to this configuration, a beta pin that can be inserted and removed from the locking pin can be used as the vertical position regulating means to simply configure the structure.

In the above configuration, the cover body includes a valve cover portion that surrounds the solenoid valve and a piping cover portion that covers the pressure oil supply / discharge path from the solenoid valve to the coupler, and the valve cover portion is the solenoid. It is preferable that the pipe cover portion is supported by the valve and is supported by the traveling machine body side.

According to this configuration, since the cover body includes a valve cover portion supported by the solenoid valve and a piping cover portion supported by the traveling machine body side, it covers both the solenoid valve and the hydraulic air supply / discharge path. Can be done.

In the above configuration, it is preferable that the pipe cover portion is formed in a downwardly open channel shape, and the pipe cover portion and the valve cover portion are configured to be connectable and disconnected from each other.

According to this configuration, both the solenoid valve and the hydraulic supply / discharge path can be covered by the cover body. In this cover portion, the valve cover portion is supported by the solenoid valve, and the piping cover portion is supported on the traveling machine body side.
Therefore, when the solenoid valve is attached or detached, the connection between the valve cover portion and the piping cover portion can be released, and the solenoid valve can be attached or detached without requiring disassembly work between the solenoid valve and the valve cover portion. At this time, the hydraulic supply / discharge passage can be opened to the outside through the downward opening portion of the channel-shaped pipe cover portion, and the hydraulic supply / discharge passage portion can be easily attached / detached together with the solenoid valve.

In the above configuration, among the plurality of locking pins, the locking pin into which the beta pin can be inserted and removed is provided at a position of the cover body exposed to the outside from the valve cover portion surrounding the solenoid valve. It is preferable to have it.

According to this configuration, the locking pin into which the beta pin can be inserted / removed is provided at a position exposed to the outside from the valve cover portion surrounding the solenoid valve, so that the beta pin and the locking pin can be easily inserted / removed. ..

It is an overall side view of a riding type mower. It is an overall plan view of a riding type mower. It is a circuit diagram which shows the hydraulic system. It is a perspective view which shows the hydraulic piping part. It is explanatory drawing which shows the operation form of the compound operation lever. It is a rear view which shows the holder device. It is a right side view which shows the holder device. It is an exploded perspective view which shows the holder device. It is an exploded perspective view which shows the cover body. It is sectional drawing in the vertical direction along the front-rear direction of a cover body. It is a right side view which shows the fulcrum support frame part of a grass collecting device. It is explanatory drawing which shows the conductive harness for high dump. It is explanatory drawing which shows the conductive harness for low dump.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Unless otherwise specified, the front-back direction and the left-right direction in the description of the present embodiment are described as follows. That is, the traveling direction on the forward side (see arrow F in FIG. 1) is "forward" and the traveling direction on the backward side (see arrow B in FIG. 1) is "" when the riding type mower to which the present invention is applied. "Rear", the direction corresponding to the right side (see arrow R in FIG. 2) with respect to the forward posture in the front-back direction is "right", and the direction corresponding to the left side (see arrow L in FIG. 2) is "left". ".

[Overall configuration of passenger-type mower]
FIG. 1 shows the entire side surface of the riding-type mower, and FIG. 2 shows the entire plane of the riding-type mower. This passenger-type mower is provided with a pair of left and right steerable front wheels 11 and 11 on the front side of the machine frame 10 of the traveling machine 1, and a pair of left and right driveable rear wheels 12 and 12 on the rear side. It is configured to run.
Below the fuselage frame 10, a rear discharge type mower device 4 is suspended and mounted between the front wheels 11 and the rear wheels 12 in the front-rear direction so as to be able to move up and down. On the rear side of the traveling machine 1, a grass collecting device 5 for accommodating the grass cut by the mower device 4 is provided.

As shown in FIGS. 1 and 2, on the machine frame 10 of the traveling machine 1, a driving unit 2 is provided at the front portion thereof, and a boarding operation unit 3 is provided on the rear side of the driving unit 2.
In the driving unit 2, the engine 20 is mounted on the machine frame 10 in a state of being built in the engine bonnet 21. The power taken out from the rear side of the engine 20 is input to the hydrostatic continuously variable transmission 6 at the rear position via the main transmission shaft 22, and the output from the hydrostatic continuously variable transmission 6 is the gear transmission mechanism. The rear wheel 12 is driven by being transmitted to the rear axle 12a supported by the left and right rear axle cases 24 via the internal transmission case 23.
The steering operation of the front wheels 11 is performed by the power steering device 7 (see FIG. 3) that operates in association with the operation of the steering wheel 31 provided in the boarding operation unit 3.

Power for work can be taken out from the front side of the engine 20. That is, a power take-out mechanism 25 configured by a belt transmission mechanism is provided on the front side of the engine 20, and the power of the engine 20 is transmitted to the mower device 4 via the PTO shaft 26 provided in the power take-off mechanism 25. There is.

The boarding operation unit 3 on the rear side of the driving unit 2 is provided with a control unit 3A provided with a control panel 30 connected to the rear side of the engine bonnet 21 and a steering wheel 31 and the like. On the rear side of the control unit 3A, a driver's seat 33 is installed above the boarding step 32 located at the feet, and a rops 34 is erected at a rear portion of the driver's seat 33.

The rops 34 are formed in a gate shape when viewed from the front, and the lower ends of the columnar legs 34a and 34a on both the left and right sides of the pair of left and right rops bases (not shown) integrally provided at the rear end of the machine frame 10. It is connected and fixed. The upper end sides of the left and right columnar legs 34a and 34a are connected by a gate-shaped upper frame 34b and are provided so as to cover the upper side of the driver's seat 33. An intermediate connecting frame 34c for connecting the left and right columnar legs 34a and 34a is provided at an intermediate position between the left and right columnar legs 34a and 34a in the vertical direction.

A guard frame 10A serving as a protective member for the front part of the machine body is provided on the front part of the machine body frame 10.
The guard frame 10A is provided with a balance weight mounting portion 14 to which a plurality of balance weights can be mounted.

[More device]
The mower device 4 includes a housing 40 that is suspended and supported so as to be able to move up and down with respect to the airframe frame 10 via a link mechanism 13 having a pair of front links 13a and rear links 13b on both left and right sides.
A mower elevating cylinder 43 is connected to the upper end of the front link 13a of the link mechanism 13. The vertical height position of the housing 40 with respect to the machine frame 10 can be changed by the expansion / contraction operation of the mower elevating cylinder 43.

A pair of left and right rotating blades 41, 41 are arranged in the housing 40. Each rotary blade 41 rotates around the center of the vertical axis, and in a state where a part of the rotation locus overlaps with each other, the rotary blades 41 are driven to rotate at a constant velocity to mow grass and are generated by the rotational motion. It is configured to discharge the grass backward from the discharge port formed at the rear of the housing 40 by the transport wind.

[Grass collector]
As shown in FIGS. 1 and 2, the grass collecting device 5 is capable of raising and lowering the grass collecting container 50 for accommodating the grass and the grass collecting container 50 with respect to the traveling machine body 1. It is provided with an elevating drive mechanism 51 to be operated.
The grass collecting container 50 is provided with a reception port (not shown) for receiving grass supplied from the mower device 4 side via a transport duct 42 on the front end side, and a discharge port 50a for discharge and its discharge on the rear end side. It is provided with an opening / closing lid 50b that covers the outlet 50a.

The elevating drive mechanism 51 includes an elevating link 52 that connects the weed collection container 50 to the rops 34 provided on the rear side of the traveling machine body 1, and a lift cylinder 53 that elevates the elevating link 52 to the rops 34. (Corresponding to a hydraulic actuator) and the posture of the grass collecting container 50 with respect to the elevating link 52 is changed from a state of a collection posture close to horizontal to a backward tilting posture of a backward descent, and the opening / closing lid 50b of the grass collecting container 50 is opened / closed. It is provided with a dump cylinder 54 (corresponding to a hydraulic actuator) for causing the operation.
The elevating link 52 includes a pair of left and right upper links 52a and a pair of left and right lower links 52b, and the front end side of each upper link 52a and the lower link 52b is detachably connected to the upper part of the rops 34, and the rear side is a grass collecting container. It is connected to the lower part near the rear end side of 50. Then, the upper end of the lift cylinder 53 composed of the hydraulic cylinder is connected to the lower link 52b, and the elevating link 52 swings due to the expansion / contraction operation of the lift cylinder 53, and the weeding container 50 is elevated. Will be.

The dump cylinder 54 composed of the hydraulic cylinder is arranged below the rear end side of the grass collecting container 50. By the expansion / contraction operation of the dump cylinder 54, the grass collecting container 50 can be swung around the swing fulcrum p1 provided in the lower portion on the rear end side. As a result, the posture of the grass collecting container 50 can be switched between a discharge posture in which the front end side is lifted and tilted backward and a collection posture in which the front end side is lowered and is close to horizontal. One end of the cylinder 54 is connected to a well-known dump operation mechanism (not shown).
The lift cylinder 53 and the dump cylinder 54 are provided in pairs on the left and right, and are arranged in the hydraulic circuit so as to operate simultaneously on the left and right.

As shown in FIG. 11, the grass collecting device 5 is provided with a fulcrum support frame 50c that supports the swinging fulcrum p1 of the grass collecting container 50. The fulcrum support frame 50c is provided with a harness insertion hole 57a through which a conductive harness 57 for a full sensor or the like (not shown) can be inserted.
The harness insertion hole 57a serves as a holding portion for maintaining a part of the conductive harness 57 so as to be located near the swing fulcrum p1 of the grass collecting container 50. In this way, by maintaining the part of the conductive harness 57 so as to pass near the swing fulcrum p1 of the grass collecting container 50, the conductivity due to the posture change of the grass collecting container 50 around the swing fulcrum p1. The amount of change in expansion and contraction of the harness 57 is small. As a result, it is possible to reduce the possibility that the conductive harness 57 is strongly pulled or greatly loosened.

As shown in FIG. 12, the conductive harness 57 is equipped with a main harness mh connected to a control circuit (not shown) provided on the traveling machine body 1 side and a grass collecting container 50 for high dump. The first conductive harness dh1 connected to the box detection switch for detecting the above, and the second conductive harness dh2 to which the full detection sensor and the selection switching valve 56 described later are connected are provided.
These main harness mh, the first conductive harness dh1, and the second conductive harness dh2 are detachably connected to each other by using conductive connectors c1, c2, c3, c4 and the like.
Of the main harness mh, the first conductive harness dh1 and the second conductive harness dh2, the main harness mh and the first conductive harness dh1 are mounted on the traveling machine body 1, and the second conductive harness dh2 is the traveling machine body 1. It is attached to the removable weeding device 5 instead of the harness.

In this way, if the fullness detection sensor and the selection switching valve 56 are connected to the second conductive harness dh2 and the first conductive harness dh1 is equipped with a box detection switch for high dump, the function on the main harness mh side is simplified. Can be transformed into.
Therefore, for example, when the low dump grass collecting device 5 is connected to the traveling machine 1, the main harness mh is used as it is as shown in FIGS. 12 and 13, and the low dump box is used with respect to the main harness mh. A third conductive harness dh3 equipped with a detection switch and a full detection sensor can be connected.
That is, the same main harness mh can be used both when the high dump grass collecting device 5 is connected to the traveling machine 1 and when the low dump grass collecting device 5 is connected.

[Pressure oil supply / discharge circuit]
The hydraulic oil from the pressure oil supply pump 8 driven by the power of the engine 20 is applied to the hydrostatic stepless speed change device 6, the power steering device 7, the lift cylinder 53, the dump cylinder 54, and the mower elevating cylinder 43. Will be supplied. The pressure oil supply / discharge circuit 80 (see FIG. 3) in which the pressure oil from the pressure oil supply pump 8 is supplied / discharged will be described.

The hydrostatic stepless transmission 6 connects a variable hydraulic pump 60 driven by the power of the engine 20 and a variable hydraulic motor 61 like the pressure oil supply pump 8 by a closed circuit 62. It has a well-known structure. Further, a charge circuit 63 for replenishing pressure oil is connected to the closed circuit 62.

As shown in FIG. 3, the pressure oil discharged from the pressure oil supply pump 8 is supplied to the steering control valve 70 of the power steering device 7.
The steering control valve 70 is switched between a neutral position 70N, a right turning position 70R, and a left turning position 70L in accordance with the operation of the steering wheel 31. At this time, the metering pump 71 sends an amount of pressure oil corresponding to the operation amount of the steering wheel 31 to the steering cylinder 72 of the power steering device 7 according to the operation amount of the steering wheel 31, and the front wheels 11 are sent to the steering wheel 31. Steer at an angle according to the amount of operation.

In the state where the steering wheel 31 is operated "straight ahead", the steering control valve 70 is located at the neutral position 70N. In this state, the entire amount of oil supplied from the pressure oil supply pump 8 flows into the first oil passage 81. In the first oil passage 81, a lift cylinder 53, a dump cylinder 54, and a mower elevating cylinder 43 are connected to the downstream side, and pressure oil is supplied to the lift cylinder 53, the dump cylinder 54, and the mower elevating cylinder 43. It is possible to do.

When the steering wheel 31 is operated to "turn right" or "turn left", the steering control valve 70 is located at the right turn position 70R or the left turn position 70L.
In this state, a part of the oil supplied from the pressure oil supply pump 8 flows to the first oil passage 81, and the other part flows to the second oil passage 82. That is, the oil supplied from the pressure oil supply pump 8 is supplied to both the first oil passage 81 and the second oil passage 82, of which the pressure oil flowing in the second oil passage 82 is a hydrostatic stepless speed change. It is supplied to the charge circuit 63 of the device 6.

The first oil passage 81 is provided with an elevating operation valve 55 as a control valve for controlling the operation of the hydraulic actuator, and a selection switching valve 56 (solenoid valve for supplying and discharging pressure oil) is provided on the downstream side of the elevating operation valve 55. A mower elevating operation valve 44 is provided.
The selective switching valve 56 is for selectively switching which of the lift cylinder 53 and the dump cylinder 54 is to be controlled, and is composed of an artificially operable solenoid valve.
The mower elevating operation valve 44 is for switching the mower elevating cylinder 43 so as to drive up or lower its own weight, and is composed of a three-position switching valve.

The elevating operation valve 55 is provided with a neutral position 55N, an ascending position 55U, a descending position 55D, and a self-weight descending position 55G configured so as to be able to bypass the center.
As shown in FIG. 3, the selection switching valve 56 selectively connects the lift cylinder 53, and in a state where the mower elevating operation valve 44 is in the neutral position 44N, the flow of pressure oil at each operation position of the elevating operation valve 55 is controlled. Looking at it, it is as follows.

At the neutral position 55N, the oil flows downstream through the center bypass path, passes through the center bypass path of the mower elevating operation valve 44, and is supplied to the third oil passage 83. Since the third oil passage 83 is connected to the charge circuit 63 of the hydrostatic continuously variable transmission 6, the pressure oil supplied to the third oil passage 83 is used as the charge oil.

When the elevating operation valve 55 is operated to the ascending position 55U, the pressure oil in the first oil passage 81 is supplied to the ascending chamber 53a of the lift cylinder 53 via the fifth oil passage 85, and the lift cylinder 53 extends. The grass collecting container 50 is raised. The pressure oil in the lowering chamber 53b of the lift cylinder 53 is returned to the elevating operation valve 55 via the sixth oil passage 86, and then supplied to the third oil passage 83 via the center bypass passage.

When the elevating operation valve 55 is operated to the descending position 55D, the pressure oil in the first oil passage 81 is supplied to the descending chamber 53b of the lift cylinder 53 via the sixth oil passage 86, and the lift cylinder 53 contracts. The grass collecting container 50 is lowered. The pressure oil in the rise chamber 53a of the lift cylinder 53 is returned to the elevating operation valve 55 via the fifth oil passage 85, and then supplied to the third oil passage 83 via the center bypass passage.

When the elevating operation valve 55 is operated to the descending position 55D, the pressure oil in the first oil passage 81 is supplied to the descending chamber 53b of the lift cylinder 53 via the sixth oil passage 86, and the lift cylinder 53 contracts. The grass collecting container 50 is lowered. The pressure oil in the rise chamber 53a of the lift cylinder 53 is returned to the elevating operation valve 55 via the fifth oil passage 85, and then supplied to the third oil passage 83 via the center bypass passage.

When the elevating operation valve 55 is operated to the self-weight lowering position 55G, the pressure oil of the first oil passage 81 is supplied to the third oil passage 83 via the center bypass passage. Then, the fifth oil passage 85 and the sixth oil passage 86 are connected to the fourth oil passage 84, and the pressure oil in the ascending chamber 53a or the descending chamber 53b of the lift cylinder 53 is returned to the tank.

When the selection switching valve 56 selectively connects the dump cylinder 54 and the mower elevating operation valve 44 is in the neutral position 44N, the flow of pressure oil at each operation position of the elevating operation valve 55 is the rise chamber of the dump cylinder 54. The result is the same as when the lift cylinder 53 described above is connected to the 54a and the lowering chamber 54b.

Next, looking at the flow of pressure oil at the operation position of the mower elevating operation valve 44, in the state of being at the neutral position 44N, the pressure oil of the first oil passage 81 enters the third oil passage 83 via the center bypass passage. Will be supplied. In the state of being in the ascending position 44U, the pressure oil of the first oil passage 81 is supplied to the ascending chamber 43a of the mower elevating cylinder 43 through the seventh oil passage 87.
In the state of being in the lowering position 44D, the pressure oil in the ascending chamber 43a of the mower elevating cylinder 43 is returned to the mower elevating operation valve 44 via the seventh oil passage 87 by the weight of the mower device 4, and then is returned to the fourth oil passage. It will be supplied to 84 and flow into the tank.

As described above, the pressure oil supplied to the steering control valve 70 of the power steering device 7 is not directly returned to the tank regardless of whether the steering cylinder 72 is operated or not. That is, the pressure oil from the power steering device 7 is the hydraulic actuator of the lift cylinder 53, the dump cylinder 54, the first oil passage 81 which is a supply circuit to the mower elevating cylinder 43, and the hydrostatic continuously variable transmission 6. It is supplied to the second oil passage 82 connected to the charge circuit 63.
Also, in the pressure oil supply path to the lift cylinder 53 and the dump cylinder 54, the return oil from the lift cylinder 53 and the dump cylinder 54 is not completely returned to the tank, but the third oil passage 83. It is supplied to the charge circuit 63 of the hydrostatic continuously variable transmission 6 via the above.

[Hydraulic piping desorption structure]
In the piping portion of the pressure oil supply / discharge circuit 80, the pressure oil is provided in the middle of the fifth oil passage 85 and the sixth oil passage 86, which are the pressure oil supply / discharge passages from the elevating operation valve 55 to the selection switching valve 56. A detachable coupler 88 that can connect and disconnect the air supply / discharge path is provided.
The coupler 88 includes a male coupler 88a provided at the rear of the traveling machine 1 and a female coupler 88b connected to the grass collecting container 50 side, enabling the supply and discharge of pressure oil in the connected state and disconnecting the connection. The supply and discharge of pressure oil between the elevating operation valve 55 and the selection switching valve 56 is cut off.
A dust cap 89 is attached to each of the pair of male couplers 88a on the traveling machine body 1 side. With the connection between the male coupler 88a and the female coupler 88b disconnected, the end of the male coupler 88a can be covered with a dust cap 89 to close the male coupler 88a.

The selection switching valve 56 provided on the downstream side of the elevating operation valve 55 is supported by a holder device 9 described later with respect to the rops 34 erected at the rear end portion of the traveling machine body 1. The holder device 9 is configured so that the selection switching valve 56 can be detachably attached to and detached from the rops 34, that is, a state in which the selection switching valve 56 is supported by the rops 34 and a state in which the support with the rops 34 is released.
Therefore, the selection switching valve 56 is in a state of being mounted on the traveling machine body 1 side in a state of being supported by the rops 34, and is in a state of being equipped in the grass collecting device 5 in a state of being released from the support with the rops 34. Become. As a result, when the grass collecting container 50 is attached to and detached from the traveling machine 1, the selection switching valve 56 is also configured to be removed from or attached to the traveling machine 1 together with the grass collecting container 50. ..

Supply / discharge pipes to the lift cylinder 53 and the dump cylinder 54 are connected to the upper surface side and the rear surface side of the selection switching valve 56, and the fifth oil passage 85 and the sixth oil passage 86 to the elevating operation valve 55 side are connected to the lower surface side. Is connected. At the ends of the fifth oil passage 85 and the sixth oil passage 86, a female coupler 88b that can be attached to and detached from the male coupler 88a on the traveling machine body 1 side is provided.

A solenoid portion 56A is provided at the end of the selection switching valve 56 on the side of the machine body, and the solenoid portion 56A is provided with a socket 56Ab that can be operated by inserting and removing the conductive plug 56Aa from the left and right directions.
Therefore, when the grass collecting container 50 is removed from the traveling machine body 1, the selection switching valve 56 is separated from the power supply unit on the traveling machine body 1 side by pulling out the conductive plug 56Aa from the socket 56Ab, together with the grass collecting container 50. It is configured to be removed from the traveling machine 1.

The lift cylinder 53 provided in the grass collecting container 50 has its lower end end connected to the lower portion of the rops 34 fixed to the traveling machine body 1. Therefore, when the grass collecting container 50 is removed from the traveling machine body 1, it is necessary to release the connection of the lower end portion of the lift cylinder 53 with the lower portion of the rops 34. Even if the connection with the lower part of the rops 34 is released, the connection state of the hydraulic pipe to the lift cylinder 53 may be maintained.
Since the dump cylinder 54 is not connected to the traveling machine body 1 side, no desorption operation is required on the grass collecting container 50 side.

When the grass collecting container 50 is attached to the traveling machine body 1, contrary to the above description, the lower end portion of the lift cylinder 53 is connected to the lower portion of the rops 34, and the conductive plug 56Aa is connected to the solenoid portion of the selection switching valve 56. It may be inserted into the socket 56Ab of 56A, and the female coupler 88b of the fifth oil passage 85 and the sixth oil passage 86 may be connected to the male coupler 88a of the traveling machine body 1.

[Operation of compound operation lever]
The expansion / contraction operation of the mower elevating cylinder 43 and the expansion / contraction operation of the lift cylinder 53 and the dump cylinder 54 are performed as follows.
As shown in FIGS. 4 and 5, in the composite operation lever 16, the body penetrates the rear wheel fender 15 in the vertical direction, and around the swing fulcrum below the rear wheel fender 15, in the front-rear direction and the left-right direction. It is supported so that it can be swung in the cross direction.

The intersection of the front-rear direction and the left-right direction in the operation direction of the compound operation lever 16 is the "neutral position N", and the position where the compound operation lever 16 is operated to the right is the "mower device ascending position M1" and the left direction. The position operated to is the "mower device lowering position M2".
The position where the composite operation lever 16 is operated backward is the "grass collecting container raising and opening / closing lid opening position B1", and the position where the composite operation lever 16 is operated one step forward (the composite operation lever 16 is on the rear side). (Located in the middle of the groove) is the "grass collecting container lowering and opening / closing lid closing position B2". The position operated further forward than the "grass container lowering and opening / closing lid closing position B2" (the compound operation lever 16 is located at the back of the groove on the rear side) is the "grass container own weight lowering position B3".

That is, when the compound operation lever 16 is operated to the right from the "neutral position N", the mechanism linked to the operation of the compound operation lever 16 to the right operates the mower elevating operation valve 44 to the ascending position 44U.
When the compound operating lever 16 is operated to the left from the "neutral position N", a mechanism linked to the leftward operation of the compound operating lever 16 operates the mower elevating operation valve 44 to the descending position 44D.

When the compound operation lever 16 is operated backward from the "neutral position N" and reaches the "grass collecting container ascending and opening / closing lid opening position B1", the mechanism linked to the backward operation of the compound operation lever 16 is operated to raise and lower. Operate the valve 55 to the ascending position 55U. At the same time, the signal detected by the sensor (not shown) that detects the operation position of the compound operation lever 16 is detected by the control device of the selection switching valve 56, and if the selection switching valve 56 is at the dump position 56D, the selection switching valve The 56 is operated to the lift position 56L for supplying and discharging the pressure oil to the lift cylinder 53.
Then, when the lift cylinder 53 is extended by a predetermined amount, when the push button 16a provided on the grip portion of the composite operation lever 16 is pushed, the selection switching valve 56 supplies and discharges pressure oil to the dump cylinder 54 side. Switch to 56D. As a result, the grass collecting container 50 is lifted to a predetermined height, and then the opening / closing lid 50b is opened to discharge the grass.

When the compound operation lever 16 is operated forward from the "neutral position N" and reaches the "grass collecting container lowering and opening / closing lid closing position B2", the mechanism linked to the forward operation of the compound operation lever 16 moves up and down. The operating valve 55 is operated to the descending position 55D. At the same time, the signal detected by the sensor that detects the operation position of the compound operation lever 16 is detected by the control device of the selection switching valve 56. At this time, if the selection switching valve 56 is present at the dump position 56D, the dump cylinder 54 is operated to the lowering side to perform contraction operation, and the opening / closing lid 50b is closed. When the push button 16a is pushed again after the opening / closing lid 50b is closed, the selection switching valve 56 is operated to the lift position 56L for supplying / discharging pressure oil to the lift cylinder 53, and the lift cylinder 53 contracts accordingly. do. When the lift cylinder 53 contracts by a predetermined amount, the grass collecting container 50 is located at a predetermined height at which the grass can be received with the opening / closing lid 50b closed.

When the combined operation lever 16 is further operated forward from the "grass collecting container lowering and opening / closing lid closing position B2" and reaches the "grass collecting container own weight lowering position B3", it is linked to the forward operation of the combined operation lever 16. The mechanism operates the elevating operation valve 55 to the self-weight lowering position 55G. At the same time, if the signal detected by the sensor (not shown) that detects the operation direction of the compound operation lever 16 is detected by the control device of the selection switching valve 56, and the selection switching valve 56 exists at the dump position 56D, The selection switching valve 56 is operated to the lift position 56L at which pressure oil can be supplied / discharged to the lift cylinder 53.
In this state, the elevating operation valve 55 is located at the self-weight lowering position 55G, the pressure oil is not supplied to the lift cylinder 53, and the pressure oil is allowed to be discharged from the lift cylinder 53. The grass collecting container 50 is in a floating state.

[Holder device]
The holder device 9 for supporting the selection switching valve 56 on the traveling machine body 1 will be described.
The holder device 9 includes a valve support mechanism 9A that supports the selection switching valve 56, a selection switching valve 56, and a cover body 9B that covers the pressure oil supply / discharge path, and is erected at the rear end of the traveling machine body 1. It is provided in the rops 34.

[Valve support mechanism]
As shown in FIGS. 6 and 7, the valve support mechanism 9A includes a support base member 90 fixed to the rops 34 and a mounting connection member 91 (corresponding to a mounting portion) fixed to the selection switching valve 56. , Is equipped.
Then, the support base member 90 and the mounting connection member 91 regulate the horizontal position movement of the mounting connection member 91 with respect to the support base member 90 in a state where the mounting connection member 91 is mounted on the support base member 90. The vertical and horizontal positions are regulated via the horizontal positioning means 92 that can be deregulated and the vertical position regulating means 93 that can regulate and deregulate the vertical movement of the mounting connection member 91 with respect to the support base member 90. It is configured so that it can be switched between the state where it is closed and the state where the regulation is lifted.

The support base member 90 is composed of a channel-shaped member fixed to a surface of the columnar leg portion 34a on the right side of the rops 34 facing the center side in the left-right direction of the machine body. In the channel-shaped support base member 90, the right lateral side portion 90b is welded and fixed to the columnar leg portion 34a in a state where the open portion 90a faces the center side in the left-right direction of the machine body. Further, two pin engagement holes 92a and 92b (corresponding to horizontal positioning means) are formed on the upper surface 90c of the support base member 90, and one pin engagement hole is also formed on the lower surface 90d of the support base member 90. 92c is formed.

The mounting connection member 91 is provided with a mounting surface portion 91a facing the upper surface 90c of the support base member 90, and the mounting surface portion 91a has two pin engaging holes formed in the upper surface 90c of the support base member 90. The long locking pin 92d (corresponding to the horizontal positioning means) that can be inserted into one of the 92a and 92b and the short locking pin 92e (corresponding to the horizontal positioning means) that can be inserted into the other are It is integrally welded and fixed.
Of these, the long locking pin 92d has another pin engaging hole formed in the lower surface 90d of the support base member 90 with the upper portion inserted into the one pin engaging hole 92a. It is also inserted into the 92c and engages with the support base member 90 at two points above and below.
The short locking pin 92e is inserted into the other pin engaging hole 92b formed in the upper surface 90c of the support base member 90.
As described above, in the mounting connection member 91, the mounting surface portion 91a is mounted on the upper surface 90c of the support base member 90, and the long locking pin 92d and the short mounting pin 92d are placed in the two pin engagement holes 92a and 92b. The locking pin 92e of the above is inserted. As a result, it is possible to prevent the mounting connection member 91 from rotating relative to the support base member 90 around the axis of each of the locking pins 92d and 92e, or moving relative to the horizontal direction.

Of the above-mentioned long locking pins 92d, the locking pins 92d are located below the upper surface 90c of the channel-shaped support base member 90 in a state of being inserted into one of the pin engaging holes 92a. A pin hole 93a is formed so as to penetrate in the radial direction. Beta pins 93b can be inserted and removed from the pin holes 93a. Therefore, with the beta pin 93b inserted in the pin hole 93a, the locking pin 92d is restricted from coming out upward, and the regulation is released by pulling out the beta pin 93b from the pin hole 93a.
The pin holes 93a and beta pins 93b constitute a vertical position regulating means 93 that can regulate and release the vertical movement of the mounting connection member 91 with respect to the support base member 90.

In the mounting connection member 91, in addition to the mounting surface portion 91a, a connecting plate portion 91b for the selection switching valve 56 and a mounting plate portion 91c of the cover body 9B are integrally formed.
A plurality of connecting holes 94a are formed in the connecting plate portion 91b, and the selection switching valve 56 is connected by a connecting bolt (not shown).
A plurality of mounting holes 95a are formed in the mounting plate portion 91c, and the cover body 9B is mounted by mounting bolts 95b.

[Cover body]
The cover body 9B is configured as follows.
As shown in FIGS. 4 and 9, the cover body 90B includes a valve cover portion 96 that surrounds the selective switching valve 56, and a piping cover portion 97 that covers the pressure oil supply / discharge path from the selective switching valve 56 to the coupler 88. I have.

The valve cover portion 96 is a combination of the first valve cover portion 96A connected to the mounting plate portion 91c of the mounting connection member 91 and the second valve cover portion 96B supported by the first valve cover portion 96A. It is configured.
The first valve cover portion 96A faces the upper surface portion 96Aa covering the upper side of the selection switching valve 56, the right lateral side surface lower portion 96Ab covering the right lateral lower portion of the selective switching valve 56, and the mounting plate portion 91c of the mounting connection member 91. The front portion 96Ac is provided.
The second valve cover portion 96B includes a right lateral side surface upper portion 96Ba that covers the right lateral upper portion of the selective switching valve 56, and a rear surface portion 96Bb that covers the rear side of the selective switching valve 56.

For the connection between the first valve cover portion 96A and the second valve cover portion 96B, the connection piece 96Bc provided at the upper end edge portion of the second valve cover portion 96B is provided in the upper surface portion 96Aa of the first valve cover portion 96A. It is polymerized on 96a and connected by the connecting bolt 96b.
A through hole 96c through which a mounting bolt 95b can be inserted is formed in the front portion 96Ac of the first valve cover portion 96A, and the front portion 96Ac is mounted and connected by tightening the mounting bolt 95b to the mounting plate portion 91c. The first valve cover portion 96A is connected and supported to the mounting connection member 91 by being sandwiched between the mounting plate portion 91c of the 91 and the mounting bolt 95b.
A partial notch 96Ad is formed on the upper surface side of the first valve cover portion 96A, and this notch 96Ad is used as an opening for taking out the pipe to the upper side of the pressure oil supply / discharge passage (FIG. 6). , 7).

The lower right lateral side surface 96Ab of the first valve cover portion 96A is located at a position retired to the center side in the left-right direction of the aircraft from the upper right lateral side surface 96Ba of the second valve cover portion 96B, and the retired first valve cover portion The first valve cover portion 96A is attached in a state where the channel-shaped support base member 90 is located at a distance between the lower right lateral side surface portion 96Ab of the 96A and the columnar leg portion 34a on the right side of the rops 34.
As a result, the long locking pin 92d and the beta pin 93b protruding downward from the mounting surface portion 91a of the mounting connection member 91 are positioned so as to be exposed to the outside of the cover body 90B. Therefore, by pulling out the beta pin 93b without the need to divide the cover body 90B itself, the selection switching valve 56 for each cover body 90B can be easily removed from the support base member 90, and the columnar leg portion 34a on the right side of the rops 34 can be easily removed. It is possible to release the connection state with respect to.

As shown in FIG. 9, the piping cover portion 97 includes a front surface 97A, an upper surface 97B, and a rear surface 97C, and is formed in a channel shape in which both the left and right ends and the lower surface side are open.
The piping cover portion 97 is supported by a pair of left and right support stays 98 attached to an intermediate connecting frame 34c that connects the left and right columnar legs 34a and 34a of the rops 34 (see FIG. 6).
That is, as shown in FIG. 10, a connecting bolt 98a projecting upward is welded and fixed to the upper portion of the support stay 98, and a through hole 97Ba is formed in the upper surface 97B of the pipe cover portion 97. By inserting the through hole 97Ba into the connecting bolt 98a and screwing and tightening the knob nut 98b from above, the upper surface 97B of the piping cover portion 97 can be fixed by being sandwiched from above and below on the upper part of the support stay 98. ing.

Inside the pipe cover portion 97 fixed to the support stay 98, a plurality of hydraulic pipes of the pressure oil supply / discharge circuit 80 are arranged along the left-right direction. Of the plurality of hydraulic pipes, the pressure oil supply / discharge passage from the selection switching valve 56 to the coupler 88 is drawn forward from the opening 97Aa formed at the intermediate position in the left-right direction on the front surface 97A of the pipe cover portion 97. It is configured to be connectable to the coupler 88.

Of the support structure of the piping cover portion 97 including the pair of left and right support stays 98 and the connecting bolt 98a and the knob nut 98b, the support stay 98 provided on the right side, the connecting bolt 98a and the knob nut 98b are at the right end of the piping cover portion 97. It also serves as a connecting metal fitting for connecting the portion and the left end portion of the valve cover portion 96.
That is, a connecting hole 98c through which the connecting bolt 98a can be inserted is formed in each of the extension cover piece 96d provided at the left end of the valve cover portion 96 and the right end of the piping cover portion 97, and the knob nut 98b is formed in the connecting bolt 98a. The valve cover portion 96 and the pipe cover portion 97 can be switched between a connected state and a disconnected state by screwing and tightening.

When removing the grass collecting device 5 in the riding type mower configured as described above, the procedure is as follows.
First, the coupler 88 is removed while the engine 20 and the pressure oil supply pump 8 are stopped, the knob nut 98b of the piping cover portion 97 is removed, and the connection of the piping cover portion 97 with the intermediate connecting frame 34c is released.
Next, the beta pin 93b in the locking pin 92d of the valve support mechanism 9A is pulled out, and the selection switching valve 56 together with the cover body 90B is removed from the support base member 90. In this state, the cover body 90B and the selective switching valve 56 are no longer supported by the support base member 90, but the plurality of hydraulic pipes of the pressure oil supply / discharge circuit 80 connected to the selective switching valve 56 are relatively retained. Since the shape is high, the cover body 90B and the selection switching valve 56 do not fall, and the removed weed collector 5 side is suspended from a plurality of hydraulic pipes of the pressure oil supply / discharge circuit 80. It will be in a state of being supported.
When the grass collecting device 5 is attached to the traveling machine body 1, the reverse of the reverse order is performed.

[1 of another embodiment]
In the embodiment, an operation tool for raising and lowering the mower device 4 and an operation tool for raising and lowering and opening and closing the grass collecting container 50 are exemplified with a structure in which a single compound operation lever 16 is used. However, the operation is not limited to this, and it may be possible to operate each separately by using different operation tools.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[2 of another embodiment]
In the embodiment, the holder device 9 has an example of a structure provided in the rops 34, but the holder device 9 is not necessarily limited to this structure. For example, the holder device 9 may be provided at an appropriate fixed portion of the traveling machine body 1 at a position different from that of the lops 34, even if the lops 34 is not used or the lops 34 is used.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[3 of another embodiment]
In the embodiment, a holder device 9 having a structure including both a valve support mechanism 9A for supporting the selection switching valve 56 and a cover body 9B is exemplified, but the structure is not necessarily limited to this structure. For example, the holder device 9 may have a structure in which only the valve support mechanism 9A is provided and the cover body 9B is omitted.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[4 of another embodiment]
In the embodiment, the valve support mechanism 9A includes a horizontal positioning means 92 capable of restricting and deregulating the horizontal position movement of the mounting connection member 91 with respect to the support base member 90, and a mounting connection member 91 with respect to the support base member 90. An example is an example of a structure in which a vertical position regulating means 93 capable of restricting and deregulating the vertical movement of the above is individually provided, but the structure is not necessarily limited to this structure. For example, as a structure capable of using both the horizontal positioning means 92 and the vertical position regulating means 93, a clip type or a magnet type fixing structure may be adopted, or only the horizontal positioning means 92 may be provided to regulate the vertical position. An appropriate structure may be adopted, such as the weight of the mounting connection member 91.

[5 of another embodiment]
In the embodiment, the horizontal positioning means 92 has a structure including two pin engaging holes 92a and 92b formed in the support base member 90 and two locking pins 92d and 92e. Although illustrated, it is not necessarily limited to this structure. For example, the pin engaging holes 92a and 92b may be provided at three or more locations, and the locking pins 92d and 92e may be provided at two or three or more locations so that they can be attached by appropriately changing their positions.
Further, the pin engaging holes 92a and 92b are not merely round holes but are formed in a square hole or a hole having a different diameter, and the locking pins 92d and 92e engaged with the pin engaging holes 92d and 92e are also formed in the square hole and the hole having a different diameter. Therefore, the pin engaging holes 92a and 92b and the locking pins 92d and 92e may be present at one place.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[6 of another embodiment]
In the embodiment, a structure in which a plurality of locking pins 92d and 92e are composed of a combination of a long locking pin 92d long in the vertical direction and a short locking pin 92e in the vertical direction is exemplified, but this is not necessarily the case. It is not limited to the structure. For example, the pin engaging hole 92b on the side on which the short locking pin 92e is engaged may have a half pierced structure, and a convex portion corresponding to the short locking pin 92e may be engaged in the half pierced portion.
Further, the locking pins 92d and 92e and the pin engaging holes 92a and 92b are provided, the locking pins 92d and 92e are provided on the support base member 90 side, and the pin engaging holes 92a and 92b are provided on the mounting connection member 91 side. It may be something that can be done.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[7 of another embodiment]
In the embodiment, the vertical position regulating means 93 has a structure configured by a beta pin 93b that can be inserted and removed from the locking pin 92d, but the structure is not necessarily limited to this structure. For example, an appropriate structure such as a clip or a screw can be adopted.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[8 of another embodiment]
In the embodiment, the cover body 9B has an example of a structure composed of a combination of a valve cover portion 96 and a pipe cover portion 97 individually configured, but the structure is not necessarily limited to this. For example, the valve cover portion 96 and the piping cover portion 97 are integrally configured so that they can be removed together with the selection switching valve 56, or conversely, the valve cover portion 96 and the piping cover portion 97 are integrally configured. , It may be configured to be fixed to the traveling machine body 1 side.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

The present invention can be used for various passenger-type mowers ranging from large machines to small machines.

1 Traveling machine 4 Moor device 5 Weed collecting device 8 Pressure oil supply source (pressure oil supply pump)
9 Holder device 9A Valve support mechanism 9B Cover body 34 Lops 50 Weeding container 53,54 Hydraulic cylinder 56 Solenoid valve (selection switching valve)
88 Coupler 90 Support base member 91 Mounting part (mounting connection member)
92 Horizontal positioning means 92a, 92b, 92c Engagement hole 92d Long locking pin 92e Short locking pin 93 Vertical position regulating means 93b Beta pin 96 Valve cover part 97 Piping cover part

Claims (10)

The mower device at the bottom of the traveling machine and
A grass collecting container that is detachably supported for the traveling machine and
A riding-type mower equipped with a plurality of hydraulic cylinders for raising and lowering and changing the posture of the grass collecting container.
Solenoid valves for supplying and discharging pressure oil to the plurality of hydraulic cylinders are provided in the pressure oil supply and discharge passages from the pressure oil supply source mounted on the traveling machine side to the plurality of the hydraulic cylinders.
A detachable coupler capable of connecting and disconnecting the pressure oil supply / discharge path is provided between the pressure oil supply source and the solenoid valve.
The solenoid valve is supported by the traveling machine body via a holder device, and the solenoid valve is supported by the traveling machine body.
A passenger-type mower in which the holder device is configured so that the solenoid valve can be attached to and detached from the traveling machine body. The traveling machine is provided with a rops erected at the rear end,
The grass collecting container is detachably supported with respect to the rops, and is supported.
The passenger-type mower according to claim 1, wherein the holder device is provided on the rops. In the holder device
A valve support mechanism that supports the solenoid valve and
The passenger-type mower according to claim 1 or 2, further comprising the solenoid valve and a cover body for covering the pressure oil supply / discharge path. In the valve support mechanism,
The support base member provided on the traveling machine side and
The mounting part provided for the solenoid valve and
A horizontal positioning means capable of restricting and deregulating the horizontal position movement of the previously described placing portion with respect to the supporting base member while the previously described placing portion is mounted on the support base member.
The passenger-type mower according to claim 3, further comprising a vertical position regulating means capable of regulating and deregulating the vertical movement of the above-mentioned mounting portion with respect to the support base member. The horizontal positioning means
A plurality of engaging holes formed in the support base member, and
With a plurality of locking pins formed in the above-mentioned resting part,
4. The fourth aspect of the present invention, wherein the plurality of locking pins engage with the plurality of engaging holes to prevent horizontal movement and relative rotation of the above-mentioned mounting portion with respect to the support base member. Riding type mower. The riding-type mower according to claim 5, wherein the plurality of locking pins are composed of a combination of a long locking pin that is long in the vertical direction and a short locking pin that is short in the vertical direction. The passenger-type mower according to claim 5 or 6, wherein the vertical position regulating means is composed of a beta pin that can be inserted and removed from the locking pin. The cover body
A valve cover portion that surrounds the solenoid valve and a piping cover portion that covers the pressure oil supply / discharge path from the solenoid valve to the coupler are provided.
The passenger-type mower according to any one of claims 3 to 7, wherein the valve cover portion is supported by the solenoid valve, and the piping cover portion is supported on the traveling machine body side. The piping cover portion is formed in a downwardly open channel shape.
The passenger-type mower according to claim 8, wherein the piping cover portion and the valve cover portion are configured to be connected to and disconnected from each other. 7. Of the plurality of locking pins, the locking pin into which the beta pin can be inserted and removed is provided at a position of the cover body exposed to the outside from a valve cover portion surrounding the solenoid valve. The described riding mower.

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