JPH0313139Y2 - - Google Patents

Description

[Detailed explanation of the idea] <Industrial application field> The present invention relates to a grass collection device.

<Prior art> Conventionally, a mower attached to a running vehicle body such as a tractor and a grass collection box are connected by a grass collection duct, and grass is collected from the mower by air flow caused by a suction mechanism. A grass collector is used that is sent to a box. Furthermore, due to limitations in the mounting position and mounting space between the mower and the grass collection box, it is difficult to construct the grass collection duct that connects the two using only straight pipes, and a bent pipe section is inevitably required.

<Problems that the invention aims to solve> The problem is that at the curved pipe part of the grass collection duct, a stagnation area is formed in the airflow caused by the suction mechanism, which causes grass clippings to accumulate, clogging the grass collection duct and reducing grass collection performance. It was hot. Most of the grass clippings were clogged on the outer periphery of the corner of the bent pipe located near the grass clippings outlet of the mower.

In view of the above, the present invention eliminates the stagnation of the air flow in the bent pipe section of the grass collection duct located near the cut grass discharge port of the mower by sucking in outside air to smooth the air flow and improve the flow of the cut grass. It is an object of the present invention to provide a grass collecting device that can efficiently perform a grass collecting function by preventing the accumulation of grass.

<Means for Solving the Problems> The technical measures taken by the present invention to solve the problems of the prior art are characterized by a mower and a grass collecting box attached to a traveling vehicle body, It is connected by a grass collection duct having a bent pipe portion located near the outlet, and the grass clippings are transported to the grass collection box by the air flow flowing from the mower to the grass collection box in the grass collection duct. In the grass collecting device, an opening is provided on the outer circumferential side of the corner portion of the bent pipe portion for sucking outside air by the air flow in the grass collecting duct to eliminate stagnation of the air flow at the corner portion of the bent pipe portion. The point is that

<Example> Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is the body of a small tractor, which has a front wheel 2 and a rear wheel 3.
A rear wheel fender 4 is provided correspondingly.
5 is a steering wheel, and 6 is a driver's seat.

A mower 7 is attached to the lower abdomen of the vehicle body 1 via a hanging mechanism, and consists of three sets of reaping parts 9 rotatably arranged below a mower deck 8.
The mower deck 8 is configured to discharge the cut grass to a discharge port 8a on the right side of the mower deck 8 by the action of a blowing plate formed on the blade of the cutting section 9. Further, limit gauge wheels 10 are attached to the left and right front ends and the center of the mower deck 8 via brackets 11, and height adjustment gauge wheels 12 are attached to the left and right rear ends via brackets 13.

Reference numeral 14 denotes a grass collecting box, which is attached to the rear of the vehicle body 1 via a bracket 15.

The mower 7 and the grass collection box 14 are the grass collection duct 1.
6. The grass collection duct 16 is formed by connecting a metal duct 16a connected to the outlet 8a on the right side of the mower deck 8 and a flexible hose 16b connected to the grass collection box 14. A blower is interposed as a suction mechanism 17 in the middle of the flexible hose 16b. The blower is mounted on a bracket 18 extending from the bracket 15 for mounting the grass collection box 14. metal duct 1
6a is a bent pipe portion 19 that is bent approximately 90 degrees between the flexible hose 16b and the discharge port 8a.

As shown in FIG.
is provided.

According to the above grass collecting device, the grass clipped by the mower 7 is sent to the grass collection box 14 by the air flow (indicated by the dashed-dotted line arrow 22 in the figure) generated by the suction mechanism 17. When this air flow passes through the bent pipe section 19, the direction of the flow is forcibly changed, so that a stagnation part of the flow where the flow stagnates or a vortex is generated is generated, and the flow is created in the stagnation part as shown in Fig. 1. Grass clippings tend to accumulate as indicated by the broken line 23. However, by providing the opening 21, outside air is sucked from the opening 21 into the grass collection duct 16, which has a negative pressure due to suction by the suction mechanism 17, and as shown by the solid line arrow 24 in FIG. A flow different from the air flow 22 caused by the suction mechanism 17 is generated, and the stagnation portion of the air flow 22 caused by the suction mechanism is eliminated. Thereby, clogging of the grass collection duct 16 can be prevented and the grass collection function can be efficiently performed.

Note that the specific location of the opening 21 depends on the curvature and inner diameter of the bent pipe portion 19, the performance of the suction mechanism 17,
The portion of the air flow 22 where stagnation occurs varies depending on the grass cutting performance of the mower 7, the state of cutting, etc. Therefore, it is advisable to determine it appropriately experimentally depending on the conditions so that stagnation can be eliminated most efficiently. For this purpose, as shown in FIG.
They may be provided on the upper surface of the curved pipe portion 19, or may be provided on the inner corner side surface, or may be provided in a plurality of rows along the corner portion of the bent pipe portion 19.

Note that the opening 21 is not limited to a single hole covered with the wire mesh 20 as in the above embodiment, but may have a large number of small diameter holes in the form of punched metal as shown in FIG.
As shown in the figure, a plurality of holes with a somewhat large diameter may be formed.

<Effects of the invention> According to the grass collection device according to the invention, the flow of outside air sucked from the opening provided on the outer circumferential side of the corner portion of the curved pipe portion of the grass collection duct allows the grass collection device to collect grass at the corner portion of the curved pipe portion of the grass collection duct. Since stagnation in the airflow is eliminated, it is possible to prevent grass clippings from accumulating and clogging the grass collection duct, and the grass collection function can be performed efficiently.

[Brief explanation of drawings]

Figure 1 is a plan view of a tractor equipped with a grass collection device according to an embodiment of the present invention, Figure 2 is a side view of the same, and Figure 3 is a side view of the same.
The figure is an enlarged view of the same main part, and FIGS. 4 to 6 are partially enlarged views showing different opening structures. 1... Vehicle body, 7... Mower, 14... Grass collecting box,
16... Grass collection duct, 17... Suction mechanism, 19...
...Bent pipe section, 21...Opening.

Claims (1)

[Scope of claim for utility model registration] A mower and a grass collection box attached to a traveling vehicle body are
The grass clippings are connected by a grass collection duct having a bent pipe located near the grass clippings outlet of the mower, and the grass clippings are transferred to the grass collection box by air flowing from the mower to the grass collection box in this grass collection duct. In the grass collecting device configured to convey the grass, outside air is sucked into the outer circumferential side of the corner portion of the bent pipe portion by air flow in the grass collecting duct to eliminate stagnation of the air flow at the corner portion of the bent pipe portion. A grass collection device characterized by having an opening.