JP2006042754A - Grass mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grass mower in which reaped grass can be recovered in a state in which reaped grass inlet of a grass-collecting container is opposed to a discharge port of a conveying duct and the recovered reaped grass can be discharged in a state in which reaped grass discharge port of the grass-collecting container is opened downward and the grass-collecting container is made to readily communicate with the conveying duct in a state in which space is scarcely formed between the grass-collecting container and the conveying duct. <P>SOLUTION: In the grass mower, a grass-collecting container 21 is rotatably supported so as to changeover to a raising and grass-collecting position and a lowering and discharging position by rotating the container 21 around a shaft center P and a discharge port 13a of a conveying duct is opened on a wall surface 22b of a fixed wall 22. When the grass-collecting container 21 attains the raising and grass-collecting position, a reaped grass-charging inlet 21d of the grass-collecting container 21 is opposed to the discharge port 13a of the fixed wall 22. When the grass-collecting container 21 attains the lowering and discharging position, the reaped grass-discharging port 21e of the grass-collecting container 21 is separated from the fixed wall 22 and kept in downward and open state. When the grass-collecting container 21 is rotated, the reaped grass-charging inlet 21d of the grass-collecting container 21 is vertically moved to the fixed wall 22 along the wall surface 22b of the fixed wall 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mowing machine including a transport duct that supplies cut grass from a mowing apparatus to a grass collection container using transport wind.

In the mowing machine, conventionally, as shown in Patent Document 1, for example, the grass collection container 6 can swing up and down around the upper fulcrum a with respect to the support frame 48 erected at the rear end of the body frame 14. In addition to being connected, the hydraulic cylinder 52 is configured to swing up and down the grass collection container 6 between the grass collection work posture and the discharge posture.
That is, when the hydraulic cylinder 52 is contracted, the grass collection container 6 is lowered and swung, and the grass collection work posture is established in which the front end of the container is received and supported by the support frame 48. Then, the front end opening of the grass collection container 6 and the wall surface 49 provided in the support frame 48 coincide, and the front end opening of the grass collection container 6 is closed by the wall surface 49. The rear end of the rear duct 44 in the transport duct 42 is plunged into the wall surface 49, and cut grass from the mower 5 (corresponding to a mowing apparatus) is supplied to the grass collection container 6 by the transport duct 44 and the transport wind. It will be collected.
When the hydraulic cylinder 52 is extended, the grass collection container 6 moves up and swings to a discharge posture. Then, the front end opening of the grass collection container 6 is opened apart from the wall surface 49 and turned downward, and the cut grass collected in the grass collection container 6 is dropped and discharged from the front end opening.

JP 2000-262124 A ([0024], [0025] stages, FIGS. 1 and 12)

When the above-described conventional technique is adopted, when the cut grass is discharged from the grass collection container, the cut grass input port of the grass collection container is separated from the discharge port of the transport duct while being separated from the wall surface. For this reason, when the grass collection container is returned to the grass collection position, the discharge port of the transport duct and the grass collection container It was easy for position shift to occur between the cut grass input. In addition, a seal structure is required so that cut grass is less likely to leak from between the transport duct and the grass collection container regardless of the positional deviation.
In particular, in the case where a tube body is provided in the grass collection container to form a cut grass insertion port for the grass collection container and guide the cut grass from the cut grass insertion port to be dispersed in the grass collection container. Since it is necessary to accurately align and seal the cut grass insertion port of the grass container and the discharge port of the transport duct, the problem has become prominent.

  The object of the present invention is to remove the position between the discharge port of the conveying duct and the cut grass input port of the grass collection container while the cut grass can be collected and discharged only by rotating the grass collection container. An object of the present invention is to provide a mower that is easy to avoid and control.

In the first aspect of the invention, in the mowing machine provided with the transport duct for supplying the grass cut from the mowing apparatus to the collecting container by the transport wind,
A fixed wall fixed to the airframe is provided, and a discharge port of the transport duct is opened on the wall surface of the fixed wall, and a cut grass insertion port of the grass collection container moves up and down along the wall surface with respect to the fixed wall. The grass collecting container is supported on a support member so as to be rotatable up and down, and the grass collecting container is rotated up and down, so that the cut grass introduction port faces the discharge port and the transport duct. And the grass collecting outlet of the grass collecting container close to the wall surface and closed by a fixed wall, and the grass cutting outlet is spaced from the fixed wall and faces downward. It is configured to switch to the lowered discharge position opened in the above state.

  That is, when the grass collection container is rotated, the grass collection container is switched between the ascending grass collection position and the descending discharge position. When the collecting container is in the raised collecting position, the cut grass input port of the collecting container communicates with the transfer duct facing the discharge port of the transfer duct that is open on the wall surface of the fixed wall, and the cut grass of the collecting container Since the discharge port is close to the wall surface of the fixed wall and closed by the fixed wall, the cut grass from the transport duct enters the grass collection container and is stored. When the grass collection container is in the descending discharge position, the cut grass discharge port of the grass collection container is opened with the fixed wall away from the fixed wall. It is dropped and discharged from.

  When the grass container is turned and the cut grass input port of the grass container is switched between the state facing the discharge port of the transport duct and the state where it is separated from the discharge port, it moves up and down along the wall of the fixed wall. Since it moves and switches, it avoids or suppresses the position of the cut grass input port of the collection container and the discharge port of the transport duct in the direction in which the cut grass input port of the grass collection container rises from the wall surface of the fixed wall. It is easy to allow the grass container to communicate with the transport duct so that a large gap is not easily generated between the grass container and the transport duct.

  Therefore, according to the first aspect of the present invention, the cut grass can be collected and discharged only by rotating the grass collection container, but a large gap between the grass collection container and the transport duct is not generated. Thus, the grass collection container can be communicated with the transport duct, and a special sealing structure is not required, and the cut grass can be collected in a state that it is difficult to leak while being simple.

  According to the second aspect of the present invention, in the configuration of the first aspect of the present invention, the cut grass insertion port is formed in the grass collection container, and the cut grass from the cut grass input port is formed in the grass collection container. A cylindrical body for distributed guidance is provided.

  That is, the cut grass from the transport duct is guided by the cylinder so as to be dispersed inside the grass collection container, and the cut grass can be collected in the grass collection container so as to accumulate as uniformly as possible. . In this case, it is necessary to communicate the cut grass insertion port in a state of being accurately aligned with the transport duct, but as described in the first aspect of the invention, it is accurately aligned and communicated so that a large gap is not formed. It becomes easy.

  Therefore, according to the second aspect of the invention, while the cut grass can be collected so as to be uniformly deposited on the grass collection container, the grass collection container is accurately aligned so that there is no large gap in the transport duct. Thus, the cut grass can be collected in a state in which it does not easily leak out even if a special seal structure is not required.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, a pair of left and right caster-type front wheels 1, a pair of left and right driveable rear wheels 2, a prime mover equipped with an engine 3 located at the rear of the vehicle body, near the front side of the prime mover A link type mechanism 7 is provided between the front and rear wheels of the body frame 6 of the self-propelled aircraft equipped with a boarding type driving unit equipped with the driver's seat 4 positioned and a fall protection frame 5 positioned near the rear side of the driver's seat 4. The mowing device 10 is coupled, and the driving force of the engine 3 is transmitted to the mowing device 10 via the mission case 8 and the rotating shaft 9, and a grass collecting container 21 is provided at the rear of the self-propelled aircraft body. In addition to the transporting duct 13 made of a resin-made flexible tube, one end of which is connected to the discharge cylinder 12a of the blower 12 provided at the lateral end of the cutting blade housing 11 of the mowing device 10 and the cut grass collecting unit 20 is provided. Cutting grass on the end side Coupled to the fixed wall 22 of the section 20, you have configured riding mower.

  That is, when the lift cylinder 7b interlocked with the rear link 7a of the link mechanism 7 is expanded and contracted, the lift cylinder 7b swings and raises the link mechanism 7 with respect to the machine body frame 6 so that the mowing apparatus 10 is grounded. The ascending / descending operation is performed between a descending work state in which the wheel 14 is grounded and a non-working state in which the ground gauge wheel 14 is lifted from the ground. When the self-propelled machine body is caused to travel while the mowing apparatus 10 is in the descending work state, the mowing apparatus 10 rotates around the axis of the self-propelled machine body in the vertical direction at a plurality of positions in the horizontal direction inside the cutting blade housing 11. The turf or grass is cut by the rotationally driven rotary mowing blade 15. The grass and grass (hereinafter referred to as “mowing grass”) cut by each rotary mowing blade 15 are removed from the mowing blade housing 11 by the wind generated by the rotation of each rotary mowing blade 15 and the conveying air generated by the blower 12. It is supplied to the cut grass collection unit 20 via the transport duct 13 and collected in the grass collection container 21.

  The cut grass collection unit 20 will be described in detail. As shown in FIGS. 1, 2, 4, and 5, the cut grass collection unit 20 includes the fixed wall 22 made of a sheet metal member fixed to the rear portion of the self-propelled machine body, and the fixed wall. The grass container 21 located on the rear side of the wall 22 of the self-propelled machine body, and the hook-shaped lock arm 31 as shown in FIG. 6 provided at the lower ends of both ends of the fixed wall 22 in the lateral direction of the self-propelled machine body. A container locking mechanism 30 is provided.

  As shown in FIGS. 4 and 6, the fixed wall 22 has a notch that opens downward in the self-propelled vehicle body at the center of the fixed wall 22 in the lateral direction of the self-propelled vehicle body as viewed in the front-rear direction of the self-propelled vehicle body. It is configured by a sheet metal member formed so as to include a portion 22a, and is arranged at the rear portion of the self-propelled aircraft body such that the rear portion of the engine bonnet 3a enters the notch portion 22a. This sheet metal member is supported by a support frame 23 erected on the body frame 6 on both lateral sides of the rear part of the self-running body. As a result, the fixed wall 22 becomes a gate-shaped wall positioned across the driving part with respect to the driving part in the longitudinal direction of the self-propelled machine body, and becomes a wall fixed to the rear part of the self-propelling machine body. Yes.

  As shown in FIG. 8, the fixed wall 22 is provided with a bonnet cover 24 that protrudes rearward from the peripheral portion of the notch 22a of the fixed wall 22 toward the self-propelled machine body. The bonnet cover 24 includes a top plate portion 24a and side plate portions 24b extending downward from both lateral ends of the top plate portion 24a toward the lower side of the self-propelled machine body, and the engine bonnet 3a and other members of the driving portion. The upper part of the part protruding from the fixed wall 22 to the rear side of the self-propelled machine body and both lateral sides thereof are covered with the top plate part 24a and the pair of side plate parts 24b, and the cut grass is placed on or attached to the engine bonnet 3a or the like. It is intended to prevent or. As shown in FIG. 6 and the like, the self-propelled machine body of the cylinder 25 provided so as to form a duct connecting part that connects the rear end part of the transport duct 13 to the upper part of the fixed wall 22 in the lateral direction of the self-propelled machine body. An opening at the rear end of the running body, which is located on the rear wall surface 22b of the fixed wall 22 facing the grass collecting container 21, and is opened to the rear wall surface 22b toward the rear of the self-propelled vehicle body 13b. The discharge port 13a is formed.

  As shown in FIGS. 5 and 6, the grass collection container 21 includes a pair of left and right mesh horizontal container portions 21 a and a mesh upper container portion 21 b communicating with the upper ends of the pair of horizontal container portions 21 a. A pair of horizontal container portions 21a are located separately on both sides of the bonnet cover 24, and an upper container portion 21b. Is arranged so as to be positioned above the bonnet cover 24, and is extended from the lower part of the fixed wall 22 on both sides of the self-propelled aircraft body. It is supported by the upper end part of the support | pillar 26 as a supporting member which has entered from the cut grass discharge port 21e.

  The grass container 21 is connected to the left and right struts 26 so as to be rotatable around an axis P that faces the self-propelled machine body, and can be rotated up and down around the axis P. When the grass collection container 21 is rotated up and down, the grass collection container 21 rises with the majority of the front side of the collection container 21 in contact with the rear wall surface 22b of the fixed wall 22 as shown in FIG. As shown in FIG. 7, the grass position and the lower part on the front side of the grass collecting container 21 are switched to a descending discharge position separated from the rear side wall surface 22 b of the fixed wall 22 to the rear of the self-propelled machine body.

  As shown in FIGS. 4 and 6, etc., the bent cylindrical body 27 is configured so that one end side is connected to the front wall 21c of the upper container portion 21b by a connecting bolt 29 and is provided inside the lateral end side of the upper container portion 21b. The cut grass insertion port 21d of the grass collection container 21 is formed by the opening at the end connected to the front wall 21b, and the cut grass of the grass collection container 21 is formed by the opening provided on the front end side of each horizontal container portion 21a. A discharge port 21e is formed. 6 and 8 show the state where the grass collection container 21 is switched to the rising grass collection position, and FIG. 7 shows the state where the grass collection container 21 is switched to the descending discharge position. When switched to the grass position, the cut grass insertion port 21d of the grass collection container 21 is in communication with the transport duct 13 so as to face the discharge port 13a of the fixed wall 22, and the pair of left and right grass collection containers 21 The cut grass discharge port 21 e is configured to be close to the rear side wall surface 22 b of the fixed wall 22 and closed by the fixed wall 22. When the grass collection container 21 is switched to the descending discharge position, the pair of left and right cut grass discharge ports 21e of the grass collection container 21 face the lower side of the self-propelled machine body, and away from the fixed wall 22, the cut grass in the grass collection container is natural. It is configured to be in an open state to fall.

  The outer surface 21f of the front wall 21c of the upper container portion 21b of the grass collection container 21 is also changed when the grass collection container 21 is switched between the rising grass collection position and the lower discharge position plate on the rear wall surface 22b of the fixed wall 22. Most of the part of the grass container 21 facing the front wall 21c is also formed in a curved surface along an arc centered on the grass container rotating axis P in a side view of the self-propelled aircraft, When the grass collection container 21 is rotated to switch from one of the rising grass collection position and the lower discharge position to the other, the cut grass input port 21d of the grass collection container 21 is fixed along the rear wall surface 22b of the fixed wall 22. While moving up and down with respect to 22, it faces the discharge port 13a of the fixed wall 22 or moves away from the discharge port 13a.

  As shown in FIGS. 4 and 6, etc., the lateral direction 27a is formed in the lateral direction 27a along the lateral direction of the self-propelled aircraft on the end side opposite to the side connected to the front wall 21c of the bent cylindrical body 27. A self-propelled machine body sideways discharge port 27b provided at the end of the portion 27a, and a self-propelled machine body downward discharge port 27c formed by providing a notch in the lower part of the sideways part 27a, are provided with a bent cylinder. The body 27 is fed to the cut grass insertion port 21d and flows through the cut grass insertion port 21d in the backward direction of the self-propelled machine body. The direction is changed in the horizontal direction and the flow is guided to flow, and the cut grass that has flowed into the horizontal portion 27a is dropped or discharged from the downward opening 27c and the horizontal discharge port 27b. As a result, the bent cylinder 27 flows and guides the cut grass from the cut grass insertion port 21d in the grass collecting container 21 in the lateral direction of the self-propelled machine body so as to evenly enter the pair of horizontal container portions 21a. .

  As shown in FIG. 6, the left and right container locking mechanisms 30 are configured such that the lock arm 31 is supported by a support member 32 fixed to a lower portion of a fixed wall 22 so as to be swingable around an axis 31 a, and A lock spring 31b connected to the base end side and a lock pin 33 provided at the lower end of the grass collection container 21 are provided.

  That is, when the operation cable 34 connected to the lock arm 31 is loosened, the lock arm 31 is swung to the lock side by the lock spring 31 b and is hooked on the lock pin 33. Then, the container lock mechanism 30 is in a locked state so that the grass collection container 21 is fixed to the raised grass collection position by the lock arm 31. When the operation cable 34 is pulled, the lock arm 31 is swung to the release side by the operation cable 34 and detached from the lock pin 33. Then, the container locking mechanism 30 is unlocked so as to allow the grass container 21 to turn downward to the lowered discharge position.

  That is, when the work is performed, the grass collecting container 21 is rotated around the axis P to the ascending grass collection position by the operation lever 28 located at the upper part of the grass collecting container 21. Then, the cut grass insertion port 21 d of the grass collection container 21 faces the discharge port 13 a of the fixed wall 22, and the grass collection container 21 communicates with the transport duct 13. The cut grass discharge port 21e is close to the rear wall surface 22b of the fixed wall 22 and closed by the fixed wall 22, and the cut grass supplied from the mowing device 10 by the transfer duct 13 enters the grass collection container 21. Store in a collection container. At this time, the cut grass supplied from the transport duct 13 to the grass collection container 21 is dispersed in the lateral direction of the self-propelled machine body of the grass collection container 21 for flow guidance by the bent cylindrical body 27 and left and right of the grass collection container 21. It is uniformly collected in the horizontal container portion 21a and collected. At this time, the left and right container lock mechanisms 30 are switched to the locked state, and the grass collection container 21 is locked at the raised grass collection position without being displaced from the raised grass collection position by traveling vibration or the like.

  When the cut grass is taken out from the grass collection container 21, the left and right container lock mechanisms 30 are switched to the unlocked state, and the operation lever 28 is operated to rotate the grass collection container 21 downward about the axis P to the lowered discharge position. To do. Then, the cut grass discharge ports 21e on the left and right sides of the grass collection container 21 are separated from the fixed wall 22 toward the rear side of the self-propelled machine body so as to face the lower side of the self-propelled machine body and open. Naturally falls on the ground from the cut grass outlet 21e. At this time, a portion 21g located on the upper side of the self-propelled machine body from the cut grass insertion port 21d of the front wall 21c of the grass collection container 21 faces the discharge port 13a of the fixed wall 22 and closes the discharge port 13a. That is, it is possible to avoid the cut grass remaining inside the transport duct 13 from the discharge port 13a.

  The operation lever 28 is in a lowered storage state in which the base end side portion of the operation lever 28 enters the inside of the grass collection container 21, and the operation lever 28 is used with the base lever side portion rising upward from the grass collection container. When the grass collection container 21 is switched to the ascending grass collection position or the descending discharge position, the operation lever 28 is pulled up to the up use state and used, thereby being in the lowered storage state. Compared with the case, the distance from the grass collection container rotation axis P of the operation part of the operation lever 28 becomes large, and the grass collection container 21 can be lightly rotated.

Side view of the entire mower Top view of the entire mower Side view of cut grass collection unit with cut grass discharged Longitudinal rear view of cut grass collection section Perspective view of collector Cross-sectional view of the grass collector at the rising grass position Cross-sectional view at the lowering discharge position of the collector Vertical side view of the cut grass recovery unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mowing apparatus 13 Conveyance duct 13a Discharge port 21 Grass collection container 21d Cut grass input port 21e Cut grass discharge port 22 Fixed wall 22b Fixed wall surface 26 Support member 27 Cylindrical body

Claims (2)

A mowing machine having a transfer duct for supplying cut grass from a mowing device to a collecting container by a transfer wind,
With a fixed wall fixed to the airframe, and opening a discharge port of the transport duct in the wall surface of the fixed wall,
The grass collection container is supported by a support member so that the cut grass insertion port of the grass collection container moves up and down along the wall surface with respect to the fixed wall, and the grass collection container is rotated up and down. By moving, the cut grass insertion port communicates with the transport duct so as to face the discharge port, and the cut grass discharge port of the grass collection container is closed by the fixed wall in the vicinity of the wall surface. A mowing machine configured to switch between an ascending grass collecting position and a descending discharging position opened in a state where the mowing grass discharge port is spaced from the fixed wall and faces downward from the machine body.   2. A mowing machine according to claim 1, wherein a cylindrical body is provided in the grass collection container to form the cut grass insertion port and to disperse and guide the cut grass from the cut grass insertion port into the grass collection container.

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