JP3734424B2 - Mower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a mower provided with a mid-mount type or front-mount type grass collection container .
[0002]
[Prior art]
As a collecting container for collecting mowed grass such as mowed grass, a collecting container in which the inlet opening is connected to the air duct on the rear end side of the traveling machine body and the entire structure excluding the inlet side is constituted by a net-like body. Is supported by a pair of upper and lower link members and a hydraulic cylinder.
In such a configuration, the grass collection container has a grass collection posture with its inlet opening directed toward the traveling vehicle body, and the grass collection container is pushed up by a hydraulic cylinder from the grass collection posture, thereby By pushing up to the swing limit, and then rotating the collecting container around the horizontal axis at the upper end of the inlet side, the posture can be switched to a discharge posture with the inlet opening facing downward. (For example, refer to JP-A-11-89385)
[0003]
[Problems to be solved by the invention]
In the conventional structure of the grass collection container, when the cut grass is discharged, the inlet duct is opened by disconnecting the air duct on the traveling machine body and rotating the grass collection container around the horizontal axis at the upper end of the inlet side. Therefore, even if the grass is full and the collecting container becomes heavy, it is useful in that the grass can be discharged without the need for attaching and detaching the grass. In particular, when the grass collection container can be discharged with the grass collection container being lifted high, it can be conveniently used when the discharged grass is loaded on a transport vehicle and transported to a predetermined location.
However, in such a configuration in which the posture is changed downward on the inlet side and the cut grass is discharged from the inlet opening facing downward, the cut grass tends not to be discharged smoothly. In other words, the grass collection container is the mowing grass cut off on the traveling machine body side and sent in the air in a blown state through the air duct, but the air duct does not decrease the air blowing speed, and Due to the necessity of passing through a narrow space at the bottom of the vehicle body, it is not possible to use one having a very large passage cross-sectional area. For this reason, the size of the inlet opening formed approximately equal to the duct diameter also tends to be small with respect to the size of the grass collection container. Therefore, the discharge of the cut grass from the entrance opening is not performed very efficiently.
Further, the cut grass that is sent on the conveying air blown from the duct tends to intensively collide with the inner surface of the container at the portion facing the duct opening, and this causes the following problems.
In other words, not only cut grass but also relatively hard objects such as pebbles may be mixed in the scattered matter that is carried by the conveying air blown out of the duct, and if these hard objects collide repeatedly, a grass collection container is formed. Doing so may damage the screen.
The cut grass is first deposited and deposited on the inner surface of the container where the conveying wind collides, but generally the conveying wind is blown from the lower front to the upper rear, Mowed grass sprayed above the rear part is intensively deposited and deposited on the inner surface of the container above the rear part. The cut grass that has fallen off accumulates on the lower surface of the container. In this way, in the grass collection container, the cut grass pile is filled up while the cut grass deposits grow from the upper rear side and the lower front side. There is a problem that the deposit is difficult to reach, and a void portion due to the bridging phenomenon of the deposit occurs here, which becomes an obstructive factor when filling the whole of the container with cut grass.
Furthermore, the one employing the swing link structure for raising and lowering configured as described above is effective in that the discharge height can be increased, but the discharge is performed at a position close to the traveling machine body. For this reason, there are disadvantages such as it is difficult for the transporting vehicle to approach when the mowing grass is discharged, and the mowing grass is likely to be sprinkled on the traveling machine body.
[0004]
An object of the present invention is to facilitate the discharge of cut grass from a grass collection container, to improve the durability of the grass collection container, and to efficiently fill the cut grass using the internal space of the grass collection container. Another object of the present invention is to provide a mowing machine including the grass collecting container, and to facilitate the discharge of the mowing grass from the grass collecting container.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the grass container of the present invention has the following technical means.
[Invention according to Claim 1]
Positioned in the grass collection position connected to the cut grass transport duct on the travel aircraft side so as to collect the mowing grass that has been wind transported from the mower equipped in the travel aircraft body, and the discharge position separated from the duct A mowing machine with a movable collecting container mounted on the traveling aircraft ,
It is composed of a box-shaped container main body having an entrance opening facing the traveling machine body at the grass collecting position and an outlet opening facing the opposite side, and a rear lid that can freely open and close the outlet opening formed in the container main body. ,
The rear lid has a non-porous surface portion provided at an upper portion facing the duct opening in the grass collecting position, and a porous surface portion configured to be able to vent while preventing passage of the mowing grass below the front lid. And the container position is configured to be switchable so that the grass opening position is in a grass cutting position with the entrance opening facing the front of the aircraft, and the water discharge position is in the cutting position with the exit opening facing downward. The rear lid is supported at the upper part with a non-perforated surface part with respect to the container body, and swings around the rotation fulcrum near the upper part of the outlet opening in the grass cutting position to open the outlet opening. A grass container configured to
A wind guide cover for covering the upper side of the upper surface of the container body of the grass collecting container and a wind guide for covering the upper half of the rear lid, and a substantially central position in the left-right direction of the wind guide cover on the upper surface side In addition, a ridge groove having a cross-sectional shape that protrudes upward and downward along the front-rear direction is formed, and the ridge groove is formed at a substantially central position in the left-right direction of the air guide in a state that continues to the ridge groove. It is formed .
[0006]
By configuring as described above, the grass collection container is provided with an exit opening that can be set to have a large opening size regardless of the diameter dimension of the cut grass transport duct on the traveling machine body side, and the cut grass is smoothly discharged from the exit opening. can do. In addition, since the mowing grass can be discharged from the exit opening located on the side opposite to the entrance opening and far from the traveling machine body, the mowing grass discharge position is also away from the traveling machine body.
The cut grass fed by the transfer air from the cut grass transfer duct is guided to the lower porous surface portion side by the non-porous surface portion in the upper half of the rear lid corresponding to the upper portion of the internal space of the grass collection container. Then, when the conveying wind passes through the porous surface portion, the cut grass has a tendency to start to be deposited from near the lower corner of the rear portion constituted by the lower surface of the collecting container and the rear lid. Thereafter, the cut grass gradually accumulates toward the center of the container, and it is easy to avoid the problem that the container filling state becomes insufficient due to the formation of voids at the corners below the rear part of the grass collection container.
In addition, when discharging the grass and cut grass from the outlet opening by switching the container posture, the rear lid is configured to swing around the rotation fulcrum near the upper portion of the outlet opening to open the outlet in the discharging posture. Smooth discharge of cut grass becomes easy.
In other words, the vicinity of the pivot point of the rear lid is composed of a non-porous surface, and the pressure density of the cut grass near the pivot point tends to be lower than near the lower end of the rear lid far from the pivot point. is there. Therefore, compared to the case where the cut grass deposits in the grass collection container are almost uniformly compacted from the lower end to the upper end of the rear lid, the imbalance of the pressure density is generated, so that The sediment is easy to move inside the collection container, and the amount of the pivotal fulcrum that is opened before the trap is increased. The cut grass with a high pressure density moves forward and smooth discharge is performed.
As described above, by providing the ridge groove on the wind guide cover and the wind guide guide, when the cut grass has accumulated on most of the grass collection container, the wind guide cover and the wind guide are brought close to the container body. If the amount of air exhausted from the duct is too large, the exhaust air passage that is discharged to the outside through the gap between the container body, the air guide cover, and the air guide tends to be narrowed, and the ventilation resistance tends to increase. In the present invention, the presence of the protrusion groove ensures a passage area between the grass collecting container, the wind guide cover, and the wind guide, and smooth exhaust air without causing unnecessary increase in ventilation resistance. It can be performed.
In addition, the presence of the ridge groove for exhausting the air is effective in increasing the shape retaining strength of the air guide cover and the air guide.
[0007]
[Invention according to claim 2]
According to a second aspect of the present invention, in the grass collection container according to the first aspect, the supply cut grass blown from the duct side collides with the non-porous surface portion of the rear lid while the grass collection container is in the grass collection position. Thus, it is located at a location facing the duct opening, and is formed in a concave curved surface shape so as to guide the cut grass downward.
[0008]
As mentioned above, the non-perforated surface part of the rear lid is configured so that not only cut grass but also relatively hard objects such as pebbles are mixed in as the flying material that rides on the conveying air blown out of the duct. Even if it exists, since it comprises the non-porous guide surface which is easy to comprise a rear cover with high intensity | strength, the improvement of the durability of a grass collection container can be aimed at. In addition, since the non-porous guide surface has a concave curved surface shape, the cut grass is smoothly guided.
[0009]
[0010]
[0011]
[0012]
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
[Structure of mower]
FIG. 1 shows a riding-type mid-mount lawn mower that is an example of a mower equipped with a grass collection container according to the present invention.
In this lawn mower, a mower 4 is suspended and mounted between a front wheel 2 and a rear wheel 3 of a riding-type traveling machine body 1 so as to be able to move up and down, and a parallel quadruple link mechanism 5 is attached to the rear part of the machine body. Thus, the grass collection container 6 is connected to be movable up and down.
[0014]
An engine 7 is mounted on the front part of the traveling machine body 1, and the power taken out from the front output shaft 8 of the engine 7 is disposed below the front part of the machine body via the belt transmission 9. The power of the working power take-out shaft 10 is transmitted to the mower 4. Further, the belt transmission 9 is equipped with a work clutch 11 comprising a tension clutch, and this work clutch 11 is linked to a work clutch lever 13 provided on the right side of the driver seat 12 in the traveling machine body 1. The work clutch lever 13 is “engaged clutch” when operated forward and “clutch disengaged” when operated backward.
[0015]
As shown in FIG. 2, the mower 4 has a structure in which three rotating blades 14 are accommodated in a deck 15 in parallel in the left and right directions, and the two left rotating blades 14 are driven clockwise. On the other hand, when the right rotating blade 14 is driven counterclockwise, the mowing grass is discharged from the outlet 15A formed near the center of the rear portion of the deck 15 on the conveying wind generated by the blade rotation. The grass collecting container 6 is led through a duct 16 disposed between the left and right rear wheels 3.
[0016]
The link mechanism 5 includes an upper link 17, a lower link 18, and a vertical link 19 that connects the rear ends of the link mechanism 5. Yes. The link mechanism 5 is driven up and down in parallel by the expansion and contraction operation of the hydraulic cylinder 25 installed between the lower portion of the support frame 24 and the lower link 18. A guard rod 35 that moves up and down as the hydraulic cylinder 25 expands and contracts is disposed in parallel on the rear side of the hydraulic cylinder 25 to prevent contact between the piston rod 25a of the hydraulic cylinder 25 and other objects. Thus, the piston rod 25a is prevented from being damaged.
[0017]
Side plates 26 provided at the rear portions of the left and right side surfaces of the grass collection container 6 are pivotally connected to a connection point a between the upper links 17 and the vertical links 19 in the left and right link mechanisms 5, and the grass collection container 6 is connected to the connection. It is supported so as to be rotatable about the point a.
[0018]
[Grass container]
As described above, the grass collection container 6 connected to the link mechanism 5 is connected to the duct 16 for conveying the mowing grass on the traveling machine body 1 side so as to collect the mowing grass that has been wind-carryed from the mower equipped in the traveling machine body 1. The position is movable between the grass collection position to be connected and the discharge position separated from the duct 16.
This grass collection container 6 has a box-shaped container body 20 provided with an inlet opening 27 that is externally fitted and connected to the duct 16 and is connected to the duct 16 at the grass collecting position and an outlet opening 28 that faces the opposite side. And a rear lid 21 that can freely open and close an outlet opening 28 formed in the container body 20.
[0019]
The container main body 20 is provided on the left and right side surfaces and the upper surface of the container main body 20 so as to prevent the passage of the cut grass in a state where ventilation is possible, and a metal container main body frame 60 constituting the outline of the box-shaped container main body 20. And a perforated plate 61 made of a metal mesh or punching metal.
The container main body frame 60 includes a metal frame part 60a having a L-shaped cross section so that a frame part extending in the front / rear direction of the top / bottom / left / right forms a ridge line part of the outer edge of the box-shaped container, A portion corresponding to a rectangular side surface of the container body 20, and a reinforcing diagonal member portion 60 b extending in a bracing manner from the upper corner on the front side toward the lower lower corner on the same side surface at the diagonal position. A peripheral frame 62 portion is configured, and a forward plate 63 that forms a front surface having the inlet opening 27 of the container body 20 on the front side of the peripheral frame 62, and a metal bottom plate 64 that closes the lower surface of the container are bolt nuts. It is configured to be integrated by detachable connection by, or by joining and fixing by welding.
The porous surface plate 61 is detachably mounted on the inner surface side of the container body frame 60 configured as described above by using connecting means such as bolts and nuts.
The rear end surface of the container body 20 is entirely open, and the rear end surface can be opened and closed by the rear lid 21 swingable around the fulcrum b. The upper part of the grass collection container 6 is covered with a synthetic resin wind guide cover 22, which guides the grass transporting air coming out from the ventilation part of the porous surface plate 61 on the upper surface of the container to the rear so that the grass cuts around. It is configured to prevent scattering.
[0020]
At the rear part of the container body frame 60 of the grass collection container 6, the upper and lower plates 26 are integrally connected and fixed across the upper and lower front and rear direction frame portions 60a. A hydraulic cylinder 30 is installed over the bracket 26a extending from the upper and lower side plates 26 and the upper extension end of the vertical link 19 in the link mechanism 5, and the hydraulic cylinder 30 is shortened to shorten the grass collection container. 6 is in a grass collecting posture along the front-rear direction with the inlet opening 27 in front, and the hydraulic cylinder 30 is extended so that the grass collecting container 6 is rotated to a rearward downward discharging posture with the outlet opening 28 facing downward. (Dump) is going to be done.
That is, the tip of the support arm 21a integrally extended from the rear lid 21 is connected to the bracket 26b extended from the side plate 26 of the grass collection container 6 so as to be rotatable around the fulcrum b, and the support As shown in FIG. 3, the link container 31 is in a grass collection posture along the front-rear direction, as shown in FIG. 3. The link 31 extends between the intermediate portion of the arm 21 b and the support portion 19 a protruding from the vertical link 19. Sometimes the rear lid 21 is in a closed position, and as shown in FIG. 4, when the grass collection container 6 is rotated to the discharge position, the linking point 31 is relatively pushed up by moving the fulcrum b, The lid 21 is opened.
[0021]
The rear lid 21 can be ventilated with a non-perforated guide surface portion 21A provided at an upper portion facing the duct 16 in a state where the grass collecting container 6 is in the grass collecting position, and the passage of the mowing grass under the lower portion. As shown in FIG. 6, a punching metal or a porous surface portion 21B stretched with a metal net is provided only in the lower half, and as shown by the arrow group in FIG. The blown grass is received by a non-perforated guide surface portion 21A formed in a concave curved surface on the inner surface of the upper half of the rear lid 21, guided downward, and conveyed from the porous surface portion 21B provided in the lower half. The wind is configured to be discharged.
Further, on the upper rear side of the rear lid 21, there is integrally a wind guide 23 made of a synthetic resin for guiding downward the grass cutting conveying wind guided rearward by the wind guide cover 22 when the container is closed. It is provided in a row and is configured to automatically operate with the rear lid 21 in conjunction with the rotation of the grass collection container 6.
[0022]
As shown in FIGS. 5 and 6, the wind guide cover 22 and the wind guide 23 have a cross-sectional protrusion that is curved in the front-rear direction and curved upward at substantially the center position in the left-right direction of the wind guide cover 22. Similarity that the groove 22a is formed and the front end side overlaps the outside of the protrusion groove 22a portion so as to form a passage continuing to the protrusion groove 22a also at a substantially central position in the left-right direction of the air guide 23. A protruding groove 23a having a sectional shape is formed.
Due to the presence of the ridge grooves 22a and the ridge grooves 23a, cut grass accumulates in most of the grass collection container 6, and the distance between the upper surface of the cut grass accumulation portion and the inner surface of the wind guide cover 22 is reduced. When exhausted, the exhausted air from the duct 16 passes through a passage formed between the upper surface of the container body 20 and the ridge grooves 22a and the ridge grooves 23a, so that the cut grass is almost full in the grass collection container 6. It will be discharged without significantly increasing the ventilation resistance.
[0023]
[Another embodiment]
Next, another embodiment of the present invention will be listed.
[1] The mower provided with the grass collection container is not limited to the mid-mount mower shown in the embodiment, but may be a mower that employs a front-mount mower.
[2] The opening of the outlet opening 13 after turning to the lifting and discharging posture is not limited to opening with the driving force simultaneously with the turning, and the exit is made by human operation irrespective of the turning. An operation for locking the opening of the opening 13 and an operation for releasing the lock may be performed.
[3] The porous face plate is not limited to a metal plate having the required strength, but may be a synthetic resin plate-like shape. In addition to replacing with a porous face plate having a different opening hole size, the opening hole size may be changed by attaching a plate face material with a small opening hole size over the porous face plate with a large opening hole size. .
[4] As shown in the embodiment, the reinforcing diagonal member is extended from the front upper corner of the grass container toward the lower rear corner on the same side and opposite to the rear lower corner. It is not limited to the one that extends from the lower front corner to the rear upper corner on the same side and diagonally, or after the diagonal position from the upper and lower front corners. An appropriate configuration, such as extending in a brace shape toward the upper and lower corners, can be employed.
[5] The porous surface portion formed in the rear lid constitutes the non-porous guide surface portion of the rear lid even if a small hole is formed in the lower part of the metal plate constituting the non-porous guide surface portion of the rear lid. The punching plate comprised separately from the metal plate to perform, or what comprised the net | network detachably may be sufficient.
[0024]
【The invention's effect】
By configuring as in claim 1, there is no restriction on the setting of the opening size compared to the inlet opening, and smooth mowing grass discharge is possible using the outlet opening that can set the opening size larger than the inlet opening. In addition to this, there is an advantage that the cut grass can be easily discharged well even at a high position such as a truck bed or a platform slightly apart from the aircraft.
The cut grass sent by the transfer air from the cut grass transfer duct is received by the non-perforated guide surface portion in the upper half of the rear lid corresponding to the upper portion of the internal space of the grass collection container, and this is received by the lower porous surface. Guided to the partial side, the cut grass started to be deposited near the corner below the rear, which is composed of the lower surface of the collection container and the rear lid. Reduces the durability of the container and avoids the problem of insufficient container filling due to the formation of voids in the corners below the rear of the collection container, effectively using the space inside the container There is an effect that can accommodate the cut grass.
Further, since the rear lid is configured to swing around the pivot point near the upper portion of the outlet opening in the discharging posture to open the outlet, the cut grass deposits in the grass collection container Compared with the case where the compaction state is almost uniform from the lower end to the upper end, the imbalance of the compactness is generated, which makes it easier for mowing grass deposits to move inside the collection container and to rotate. The amount of the fulcrum that is released before the wing increases. The pressure density at the lower end of the rear lid tends to be higher and heavier. Can be easily discharged.
By providing the groove on the wind guide cover and the wind guide guide, even when cut grass has accumulated in the majority of the grass collection container, the passage between the grass collection container and the wind guide cover and the wind guide The area can be secured, and smooth air can be exhausted without causing unnecessary increase in ventilation resistance.
In addition, the presence of the ridge groove for exhausting the air is effective in increasing the shape retaining strength of the air guide cover and the air guide.
[0025]
Conveyance blown out from the duct by forming a non-porous guide surface portion that is easy to construct with high strength in the upper half of the rear lid at a location facing the cut grass conveyance duct as in claim 2 Even if relatively hard objects such as pebbles are mixed in as scattered matter on the wind, not only mowing grass but also contact with these can be avoided to improve the durability of the grass collection container. Can be planned. Moreover, since the non-porous guide surface has a concave curved surface shape, there is an advantage that the cut grass can be guided smoothly.
[Brief description of the drawings]
FIG. 1 is an overall side view of a mower equipped with a grass collection container according to the present invention. FIG. 2 is a plan view of a mower. FIG. 3 is a side view of a grass collection container in a grass collection position. Side view showing position changing operation [FIG. 5] Perspective view showing disassembled state of grass collection container [FIG. 6] Schematic cross-sectional view showing the state of ventilation of grass collection container [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Traveling machine body 4 Moore 5 Link mechanism 6 Grass collecting container 16 Duct 20 Container main body 21 Rear cover 21A Guide surface part 21B Porous surface part 22 Wind guide cover 23 Wind guide 26 Installation plate 27 Inlet opening 28 Outlet opening

Claims (2)

Positioned in the grass collection position connected to the cut grass transport duct on the travel aircraft side so as to collect the mowing grass that has been wind transported from the mower equipped in the travel aircraft body, and the discharge position separated from the duct A mowing machine with a movable collecting container mounted on the traveling aircraft ,
It is composed of a box-shaped container main body having an entrance opening facing the traveling machine body at the grass collecting position and an outlet opening facing the opposite side, and a rear lid that can freely open and close the outlet opening formed in the container main body. ,
The rear lid has a non-porous surface portion provided at an upper portion facing the duct opening in the grass collecting position, and a porous surface portion configured to be able to vent while preventing passage of the mowing grass below the front lid. And the container position is configured to be switchable so that the grass opening position is in a grass cutting position with the entrance opening facing the front of the aircraft, and the water discharge position is in the cutting position with the exit opening facing downward. The rear lid is supported at the upper part with a non-perforated surface part with respect to the container body, and swings around the rotation fulcrum near the upper part of the outlet opening in the grass cutting position to open the outlet opening. A grass container configured to
A wind guide cover for covering the upper side of the upper surface of the container body of the grass collecting container and a wind guide for covering the upper half of the rear lid, and a substantially central position in the left-right direction of the wind guide cover on the upper surface side In addition, a ridge groove having a cross-sectional shape that protrudes upward and downward along the front-rear direction is formed, and the ridge groove is formed at a substantially central position in the left-right direction of the air guide in a state that continues to the ridge groove. A formed mower . The mowing machine according to claim 1, wherein the non-perforated surface portion of the rear lid is formed in a concave curved surface shape so as to guide the mowing grass downward.

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