JPH0725Y2 - Grass shooter for riding lawn mower - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a grass shooter for a riding lawn mower, which serves as a passage for carrying the cut grass into a grass bag.

[Conventional technology]

A riding lawn mower is one in which a cutter blade is rotated by the output of an engine to cut grass while traveling on a road surface.

FIG. 6 shows a conventional riding lawn mower, in which a cutter housing 61 is attached to a lower portion of a vehicle body 60, and a cutter blade 62 which rotates with an output of an engine is installed in the cutter housing 61.
Is stored. A grass bag 63 for accommodating grass clippings is attached to the rear part of the vehicle body 60, and the upper part of the grass bag 63 is covered with a hopper top 64. The grass cut by the cutter blade 62 has a cutter housing 61.
Then, the glass bag 63 is conveyed and stored in the glass bag 63. Therefore, a grass shooter 70 that conveys the grass is provided between the cutter housing 61 and the hopper top 64 that covers the grass bag 63. Grass shooter 70
Is composed of three members, a lower shooter 71 on the side of the cutter housing 61, an upper shooter 73 on the side of the hopper top 64, and a middle shooter 72 connecting the lower shooter 71 and the upper shooter 73, so that the cutter housing 61 faces the hopper top 64. It extends diagonally upward. Here, the rear end portion (lower end portion) of the middle shooter 72 has a large diameter, and the leading end portion of the lower shooter 71 is loosely inserted in the large diameter portion 72a. On the other hand, the upper shooter 73 has an upper portion curved in an arc shape, and a tip end portion 73b of an elbow portion 73d thereof is rotatably inserted into a side surface of the hopper top 64, and a rear end portion thereof has a large diameter portion 73a. This large diameter part 73a
The tip of the middle shooter 72 is inserted in. Further, a pin 74 is provided at a connecting portion between the middle shooter 72 and the upper shooter 73, and the middle shooter 72 and the upper shooter 73 are coupled so as to rotate about the pin 74. Further, a grip 75 is provided on the outer side surface of the upper shooter 73, and the inside of the glass shooter 70 is opened as will be described later by using this grip 75 as a clue.

FIG. 7 shows a pivotal structure of the middle shooter 72 and the upper shooter 73 by the pin 74. A pin hole 72c formed of a round hole is formed at the tip of the middle shooter 72 and a large diameter portion 73a of the upper shooter 73 is formed. 73c which is also a round hole
Has been formed. Then, insert the pin 74 with the pin holes 72c and 73c communicating with each other, and attach the nut 75 to the tip of the pin 74.
The middle shooter 72 and the upper shooter 73 are pivotally attached by screwing.

In the glass shooter 70 configured as described above, the airflow generated by the high speed rotation of the cutter blade 62 is sent,
This air flow serves as a passage for transporting the turf from the cutter housing 61 to the hopper top 64, and the transport of the turf may cause dirt and dust to be attached to the inner surface of the turf, which may cause clogging of the turf. Open the interior for cleaning and removing grass clippings. FIG. 8 shows this opening operation. When the handle 75 is gripped and the upper shooter 73 is lifted upward, the upper shooter 73 rotates upward around the tip portion 73b inserted into the side surface of the hopper top 64. By this rotation, the middle shooter 72 pivotally attached to the upper shooter 73 by the pin 74 is lifted while being bent in a "<" shape around the pin 74, and the large diameter part 72a is disengaged from the tip part of the lower shooter 71. . Therefore, grass shooter
The inside of 70 will be opened, and cleaning and removal of grass clippings will be performed.

[Problems to be solved by the device]

By the way, in the grass shooter, it is good for the lawn transportation that the air flow is smooth, and therefore the elbow portion 73d above the upper shooter 73 has a large radius of curvature. With the increase, the upper shooter 73 becomes longer, and the middle shooter 72 is shortened accordingly. As a result, the degree of freedom of the degree of bending of the middle shooter 72 into the "<" shape for separating from the lower shooter 71 is reduced, and there is a problem that the middle shooter 72 is not separated from and rejoined with the lower shooter 71. Therefore, reference numeral G in FIG.
As shown in, it is possible to form a large gap size between the large diameter portion 72a of the middle shooter 72 and the lower shooter 71 to be inserted therein, or to cut the large diameter portion 72a of the middle shooter 72 obliquely and largely. Conceivable. However, in the former case, the grass clippings leak from the gap G to reduce the storage efficiency of the cutting grass, and the flow pressure of the airflow is reduced, so that the grass cutting force is reduced. On the other hand, in the latter case, the yield of shooter material is deteriorated due to the oblique cutting, and none of them is a fundamental solution.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the length of the middle shooter due to the increase in the radius of curvature of the elbow portion of the upper shooter, even if the lower shooter is used. An object of the present invention is to provide a grass shooter for a riding lawn mower that can easily perform the operations of separating and reconnecting.

[Means for Solving the Problems]

To achieve the above object, the present invention provides a lower shooter connected to a cutter housing provided at a lower part of a vehicle body, an upper shooter connected to a hopper top that covers a grass bag for storing grass clippings, the lower shooter and the upper shooter. In a riding lawn mower provided with a middle shooter connecting between and, a tip of the upper shooter is rotatably attached to the hopper top, and the middle shooter is connected to the middle shooter. A guide hole formed so as to extend in the sliding direction of the middle shooter and a pin to be inserted into this guide hole are provided in the connecting portion with the upper shooter, so that the middle shooter is connected to the upper shooter. It is slidable in the length direction so that it can be disconnected from the connection with the lower shooter. Sliding amount of the upper chute direction of the middle chute to symptoms is equal to the amount of sliding of the guide hole of the pin,
Further, the insertion amount for connecting the lower shooter to the middle shooter can be set to a position where the middle shooter is separated from the connection with the lower shooter by the uppermost slide of the middle shooter in the upper shooter direction.

[Action]

In the above configuration, when the middle shooter is slid in the length direction, the middle shooter is disconnected from the connection with the lower shooter and separated from the lower shooter. By rotating the middle shooter upward in this separated state, the inside is opened. On the other hand, the reconnection with the lower shooter is smoothly performed by performing the above operation in reverse. Further, in the above operation, the guide hole and the pin serve to smoothen the sliding of the middle shooter and prevent the middle shooter and the upper shooter from coming off.

〔Example〕

1 and 2 are a side view and a plan view showing an entire riding lawn mower to which the present invention is applied.

The riding lawn mower 1 has four wheels, a front wheel 3 and a rear wheel 4, at a lower portion of a vehicle body 2, an engine (not shown) is housed in a bonnet 5 at the front portion of the vehicle body 2, and a seat 6 and a seat 6 are provided on the vehicle body 2. A handle 7 is provided. Further, a cutter housing 8 having an open lower surface is attached to a lower portion of the vehicle body 2 located between the front wheels 3 and the rear wheels 4, and a cutter blade 9 that rotates using an engine as a power source is disposed in the cutter housing 8. Has been done. Further, a glass bag 10 for storing the cut grass is attached to the rear portion of the vehicle body 2, and the grass bag 10 and the cutter housing 8 are connected by a grass shooter 11 serving as a conveyance path for the grass.

In the figure, 15 is a support stay, 16 is a brace, and the glass bag 10 is supported on the rear part of the vehicle body 2 by a support frame (not shown) attached by the support stay 15 and the brace 16. Reference numeral 17 denotes a hopper top that covers the top of the glass bag 10 and can be opened and closed.

Next, the glass shooter 11 will be described. Each of the grass shooters 11 forms a passage for carrying the grass clippings from the cutter housing 8 into the glass bag 10 by connecting a plurality of cylindrical shooters made of synthetic resin. The right side surface of the vehicle body 2 extends in a substantially arc shape. In this embodiment, the glass shooter 11 includes a lower shooter 12 on the cutter housing 8 side and an upper shooter on the hopper top 17 side.
14 and a middle shooter 13 that connects the lower shooter 12 and the upper shooter 14 to each other. The lower shooter 12 has a rear end (lower end) inserted and fixed to a side surface of the cutter housing, and an open end thereof serves as an inflow port 31 (see FIG. 5) for cutting grass and air. The lower shooter 12 is fixed to the cutter housing 8 so as to extend obliquely upward and rearward of the vehicle body 2. The tip (upper end) of the lower shooter 12 is inserted into the rear end (lower end) of the middle shooter 13. In order to allow the lower shooter 12 to be inserted, a large diameter portion 34 having an inner diameter approximately the same as or slightly larger than the outer diameter of the lower shooter 12 is formed at the rear end portion of the middle shooter 13. The middle shooter 13 has its tip (upper end) inserted into the rear end (lower end) of the upper shooter 14. Upper shooter 14
Is equipped with an elbow portion 32 curved in an arc shape in the upper part, and the tip end side of this elbow portion 32 is inserted into the right side surface of the hopper top 17 to serve as a discharge port 33 for grass clippings facing the glass bag 10. . Here, the hopper top 17 into which the tip of the upper shooter 14 is inserted is a side wall on the right side in the traveling direction.
17a and a hopper top main body 17b that is separable from the glass bag 17 and covers the entire glass bag 10 and that is formed in a shape that bulges somewhat rearward of the glass bag 10. Then, the fitting hole 17c formed in the side wall 17a
By fitting the discharge port 33 at the tip of the upper shooter 14 into the glass bag 10, the grass clippings carried by the air flow caused by the rotation of the cutter blade 9 are discharged into the glass bag 10. A handle 18 for opening the inside of the grass shooter 11 when cleaning the inside of the grass shooter 11 and removing clogging of grass clippings is provided on the side surface of the middle shooter 13. A transparent window (not shown) is formed on a part of the side surface of the seat 6 of the middle shooter 13 in order to visually confirm the passing state in the glass shooter 11.

FIG. 3 shows a connecting portion between the middle shooter 13 and the upper shooter 14, and a large diameter portion 35 having an inner diameter into which the middle shooter 13 can be inserted is formed at the rear end portion of the upper shooter 14, and the middle shooter 13 is It is inserted in the axial direction of the large diameter portion 35. The large diameter portion 35 of the upper shooter 14 is formed to be slightly longer so that the middle shooter 13 can slide in the length direction (axial direction), and the tip side of the large diameter portion 35 is tapered. The diameter is approximately the same as that of the middle shooter 13 with the step 36 as a boundary. With such a configuration, the middle shooter 13 is slidable in the length direction of the middle shooter 13 when it is inserted into the upper shooter 14, and the tip of the middle shooter 13 is a stepped portion of the upper shooter 14.
It comes to stop by contacting with 36.
This sliding amount is determined by the distance L between the tip of the middle shooter 13 and the step of the upper shooter 14. The large diameter portion 34 of the middle shooter 13 in the lower shooter 12 (first
(See Fig. And Fig. 2)
The middle shooter 13 is set to be disconnected from the connection with the lower shooter 12 by sliding in the 14 direction.
In FIG. 3, reference numeral 37 is a guide hole formed in the large diameter portion 35 of the upper shooter 14, and a pin 38 attached to the tip of the middle shooter 13 is inserted into this guide hole 37. FIG. 4 shows a cross section of the guide hole 37 portion. The guide hole 37 is formed so as to extend in the same direction as the sliding direction of the middle shooter 13, that is, in the length direction of the middle shooter 13. The pin 38 has a head portion 38a larger than the width of the guide hole 37, and a screw portion 38b formed at the lower end of the shaft portion. The pin 38 is inserted into the guide hole 37 from the upper shooter 14 side to penetrate the middle shooter 13, and is attached by screwing the nut 39 into the screw portion 38b.In this state, the middle shooter 13 is slid to guide the guide hole. Slide inside 37. Then, by making the slide amount _Lo of the pin 38 in the guide hole 37 equal to the above L, the middle shooter 13 can be slid in the length direction described above.

Next, the operation will be described. In the state shown in FIG. 1, when the handle 18 is gripped and the middle shooter 13 is slid upward along the length direction (direction of arrow A in FIG. 5), the tip end thereof is locked to the stepped portion 36 of the upper shooter 14. And stop. By this slide, the middle shooter 13 separates from the lower shooter 12 and disconnects from the connected state with the lower shooter 12. In this case, the pin 38 comes into contact with the tip side of the guide hole 37 and is stopped. In this state, move the middle shooter 13 upward (5th
When pulled up (in the direction of arrow B in the figure), the middle shooter 13 and the upper shooter 14 integrally rotate upward around the tip of the upper shooter 14 inserted into the side surface of the hopper top 17. In this state, the inside of the glass shooter 11 is opened as shown by the broken line in FIG. 5, so that the inside of the glass shooter 11 can be cleaned and the grass clogging can be removed. Next, reconnecting the middle shooter 13 and the lower shooter 12
After rotating 13 downward to align with the lower shooter 12, the handle 18 is released. As a result, the middle shooter 13 slides downward due to its own weight,
34 is fitted to the lower shooter 12. In this case, the pin
38 slides in the opposite direction in the guide hole 37 and stops at the rear end of the guide hole 37. Therefore, the middle shooter 13
By the action of, the re-connection with the lower shooter 12 is performed without separating from the upper shooter 14.

In such an embodiment, the middle shooter 13 is slid in the length direction to be detached from the lower shooter 12 and connected thereto, and the middle shooter 13 may be bent like a dogleg as in the prior art. Absent. Therefore, even if the middle shooter 13 has a short length, it can be reliably and easily detached from and connected to the lower shooter, and the gap between the lower shooter and the middle shooter is accompanied by leakage of the cut grass and a decrease in the carrying force. Is unnecessary, and diagonal cutting is also unnecessary.

In the above embodiment, the sliding amount of the middle shooter 13 is determined by the distance L between the tip of the shooter and the stepped portion of the upper shooter 14, but the invention is not limited to this, and is determined by the length L _{o of the} guide hole. You may. Further, the guide hole may be formed in the middle shooter and the pin may be formed in the upper shooter, and these may not be provided.

[Effect of device]

Since the present invention is configured as described above, since the middle shooter is slid in the length direction to be disconnected and connected to the lower shooter, even if the middle shooter is short, the disconnection and connection can be surely performed. It can be done easily. For this reason, it is possible to increase the curvature of the elbow portion of the upper shooter, which requires shortening of the middle shooter,
It is possible to increase the carrying power of the cut grass.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view showing an entire riding lawn mower to which the present invention is applied, FIG. 2 is a plan view of the same, and FIG. 3 shows a middle shooter and an upper shooter. 4 is a cross-sectional view showing the main part of FIG. 3, FIG. 5 is a side view showing the operating state, FIG. 6 is an overall side view showing a conventional example, and FIG. FIG. 8 is a cross-sectional view showing the connection between the middle shooter and the upper shooter, and FIG. 8 is a side view showing the operating state of the conventional example. 1 ... Riding lawn mower, 2 ... Car body, 3 ... Front wheels, 4 ... Rear wheels, 5 ...
Bonnet, 6 ... Seat, 7 ... Handle, 8 ... Cutter housing, 9 ... Cutter blade, 10 ... Glass bag, 11 ... Grass shooter, 12 ... Lower shooter, 13 ... Middle shooter, 14 ... Upper shooter, 15 ... Support stay,
16 ... Brace, 17 ... Hopper top, 18 ... Handle, 31 ... Inlet, 32 ... Elbow part, 33 ... Discharge port, 34, 35 ... Large diameter part, 36
… Steps, 37… Guide holes, 38… Pins, 39… Nuts.

Claims (2)

[Scope of utility model registration request] 1. A lower shooter connected to a cutter housing provided at a lower portion of a vehicle body, an upper shooter connected to a hopper top for covering a grass bag for storing grass clippings, and a connection between the lower shooter and the upper shooter. In a riding lawn mower having a middle shooter and a discharge passage for cutting grass, the tip of the upper shooter is rotatably attached to the hopper top, and the middle shooter and the upper shooter are connected. The part is provided with a guide hole formed so as to extend in the sliding direction of the middle shooter and a pin to be inserted into this guide hole, so that the middle shooter is connected to the lower shooter while being connected to the upper shooter. A riding lawn mower characterized by being slidable in its length direction so as to be separated from the Glass shooter. 2. A slide amount of the middle shooter in the upper shooter direction is equal to a slide amount in a guide hole of the pin, and an insertion amount for connecting the lower shooter to the middle shooter is an upper shooter of the middle shooter. The grass shooter for a riding lawn mower according to claim 1, wherein the middle shooter is set to a position where the middle shooter is disengaged from the connection with the lower shooter by the maximum slide in the direction.