JPH0728814Y2 - Double walk lawn mower - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is mainly used for carrying out a lawn mowing method in which a zebra pattern is formed on a cutting surface in a green or tee ground by alternately changing the cutting direction of each row. The present invention relates to a double walk type lawnmower.

[Conventional technology]

In recent lawn mowing on a golf course, in addition to the original purpose of simply mowing an extended lawn, a mowing method is carried out to make the mowed lawn surface look beautiful. For example, if the lawn mower is folded back and forth at the mowing end of each row to perform lawn mowing work, the mowing directions of the rows are alternately reversed, and a common mowing pattern appears every other row. It looks like a zebra pattern.
This lawn mowing method is commonly called "zebra mowing".

However, when performing this "zebra mowing", conventionally, a self-propelled lawn mower (single mower) equipped with only one cutting unit was used. Therefore, in addition to poor work efficiency, in order for the worker to drive the lawn mower based on the cutting line of the line immediately before the end of cutting,
The number of times the lawnmower travels has increased, and due to the accumulation of errors in the traveling position of the lawn mower relative to this mowing line, the mowing line gradually moves away from the straight line and meanders. There was also a problem that it would meander and look bad.

Further, in a riding lawn mower, multiple cutting units of three or more units are displaced from the machine body along the traveling direction of the machine body, and are overlapped by a predetermined width along the lateral direction orthogonal to the traveling direction. There is known a structure in which the cutting width is widened in one run by mounting. However, such a multiple-type lawnmower can improve the work efficiency by widening the cutting width in one run, but the cutting direction of each row is made different alternately, and it is unique to the cutting surface. It is not possible to form a mowing pattern.

[Problems to be solved by the device]

The present invention improves the efficiency of the mowing work when performing the above-mentioned "zebra mowing" and prevents the boundary line of each mowed line from becoming a large meandering shape, and makes the mowed grass look good. It is an object to provide a lawnmower capable of forming a good zebra pattern.

[Means for Solving the Problems]

A walk-behind lawnmower according to the present invention for solving the above-mentioned problems, in which a pair of cutting units is provided in a machine body at intervals narrower than an effective cutting width of the cutting unit in a lateral direction orthogonal to a traveling direction of the machine body. The feature is that it can be cut at the same time for two articles that are attached and separated by one article.

[Function of device]

Since a pair of cutting units is a double-type lawnmower that is installed laterally at a distance narrower than the effective cutting width of the cutting unit, when performing "zebra mowing", the cutting unit is a single cutting unit. Doubles the efficiency of mowing work compared to mowers.

Also, for the same reason, the number of times the lawnmower is run based on the cutting line of the strip immediately before the mowing is reduced by half, so the accumulation of the error in the running position of the lawn mower with respect to this cutting line is also reduced by half, The amount of deviation of the boundary line of each line of the cut grass surface from the reference line is halved. As a result, the boundary line of each strip does not meander greatly, and a beautiful zebra pattern can be formed on the grass surface.

〔Example〕

 Hereinafter, the present invention will be described in more detail with reference to examples.

1 to 4, the lawn mower M ₁ is a self-propelled lawn mower having rear wheels as driving wheels, and rear wheels 2 as driving wheels are attached to both sides of the machine body 1, It has a three-wheel structure in which front wheels 4 are attached to the front of the machine body 1 via a frame 3, and a predetermined space is provided on both sides of the frame 3 along a direction orthogonal to the traveling direction P of the machine body 1. A cutting unit U is attached to each. Arm 5 for mounting this cutting unit U,
A bracket 6 attached to a base end portion of the frame 3 is pivotally attached via a pin 7 so as to be vertically rotatable. Fourth
As shown in the enlarged view of the drawing, a connecting pipe 8 is fixed to the central portion of the arm 5, and a connecting pin 11 is fixed to a frame 9 having a U-shaped plane. It is rotatably inserted in 8 and is prevented from coming off by a retaining pin 12. A traction roller 13 is attached to the tip of the frame 9, and a pair of traction rods are attached to the frame 9.
The cutting unit U is connected by a pulling method via 14. Both side plates 15 that constitute the cutting unit U and each lifting plate 16 that is attached to the lower surface of the arm 5 at a predetermined interval in the lengthwise direction of the cutting unit U include a rocking prevention arm 17 and a hanging rope. When the cutting unit U is lifted up, the cutting unit U is hung from the arm 5 via the hanging rope 18. Before and after the cutter 19 that constitutes the cutting unit U, the front roller 2
1, and the rear roller 22 is attached.

Further, as shown in FIG. 3, another bracket 23 is attached to a portion of the base end portion of the frame 3 above the bracket 6, and a hydraulic cylinder is attached to the bracket 23.
The base end of 24 is pivotally attached via a pin 26, and the tip of the rod 24a of the hydraulic cylinder 24 attaches the pin 30 to a bracket 25 attached to a portion near the free end of the arm 5. Is supported through. Therefore, as shown by the chain double-dashed line in the figure, the rod 24 of the hydraulic cylinder 24
When a is retracted, the arm 5 pivots upward about the pin 7 and the cutting unit U is lifted.

Therefore, during cutting, the cutting unit U
While rotating about the front roller 21, it also rotates about the connecting pin 11 orthogonal to the front roller 21,
Moreover, the arm 5 equipped with the cutting unit U
Has a structure of vertically rotating about the pin 7, so that the lawn mowing work can be performed by following almost any inclination of the lawn surface.

If the width of the cutters 19 that make up the cutting unit U is (W ₁ ) and the spacing between the cutters 19 is (W ₂ ),
The relationship (W ₁ > W ₂ ) is established between them.

Next, the transmission system of the driving force of the cutter 19 will be briefly described. A drive shaft (not shown) of the engine 27 mounted on the machine body 1 and a gear box mounted on the side of the machine body 1
An input shaft (not shown) of 28 is connected, and an output shaft (not shown) of this gearbox 28 and an input shaft (not shown) of a gearbox 29 mounted on the lower part of the frame 3 are connected. The power transmitted to each output shaft 32 provided on both sides of the gear box 29 by the rod 31 is connected to the connecting rod 33,
And the cutter 19 via each gear (not shown) in the gear box 34 provided on the side of the cutting unit U.
Is transmitted to the rotating shaft 19a of the cutter, and thereby the cutter 19 is driven and rotated. Further, the rear wheel 2 is rotated by the driving force of the engine 27.

Reference numeral 35 in the figure denotes a handle attached to the machine body 1.

FIGS. 5 (a) and 5 (b) are views for explaining the lawn mowing condition of the lawn mower M _{1 on} the outward path and the return path, respectively.
The lawn mowing work using the above-mentioned double lawn mower M ₁ will be described with reference to the same figure, as shown in the same figure (a).
In order to perform the (n) th mowing, the cutter 19 is overlapped by a predetermined width on the (n-1) th strip that has just been cut, and the cutting line L ₁ of this strip is used as a reference. When the lawn mower M ₁ is moved forward, two rows of the uncut section A separated by the middle one row are cut at the same time.

Next, in order to perform the (n + 1) th mowing, as shown in (b) of the same figure, the lawn mower M ₁ is folded back at the cutting edge of the strip that has been mowed at the (n) th time, and one cutting unit is cut. The cutter 19 of U is positioned at the uncut portion A between the strips that have been cut immediately before (n) th time, and the cutting line L ₁ of the (n) th cut that has just finished cutting is used as a reference. When the lawn mower M ₁ is moved forward, the two rows are cut at the same time, apart from the row that has been cut immediately before (n) times. In the (n + 1) th cutting, the width of the uncut portion A between the strips cut immediately before the (n) th time is equal to the interval (W ₂ ) between the _two cutters 19. Since it is smaller than the width (W ₁ ) of, there is no uncut area.
After that, the above-mentioned work is repeated to perform lawn mowing work. When the lawn mowing work is performed in this manner, as shown in FIG. 6, a zebra pattern in which the mowing patterns of the respective stripes are alternately different is formed on the mowing surface through the straight boundary line L _2, and the mowing is performed. The beauty of the turf surface is enhanced. This zebra pattern is the same as when a single mower was performing lawn mowing work.

Further, when the uncut portion A remaining between the strips that has just been cut is cut, the three boundary lines L ₂ that appear consecutively and simultaneously at the same time are parallel to each other. (If, even if it meanders, the three meandering lines that appear at the same time have the same meandering state). That is, if the lawn mower according to the present invention is used for lawn mowing,
It is guaranteed that three consecutive boundary lines among the four boundary lines that appear are parallel to each other, so that the cut grass surface looks good. In this point, when using a single mower, it is not possible to trim the boundary lines so that they are parallel to each other.
difficult.

Further, the lawn mower M ₂ shown in FIG. 7 has a structure in which the front wheels serve as driving wheels to perform work, and only parts different from the lawn mower M ₁ will be described.

An engine 27 is mounted on a machine body 1 provided at a tip portion of a frame 3, two front wheels 4 ′ which are drive wheels are attached to the machine body 1, and a rear wheel 2 which is a driven wheel at a base end portion of the frame 3. ′ Is attached, and the driving force of the engine 27 is transmitted through the gearbox 36 mounted on the side of the machine body 1 and each gear (not shown) in the gearbox 37 mounted on the lower portion of the frame 3. The transmission force is transmitted to the output shaft 38 of the gear box 37, and the driving force transmitted to the output shaft 38 is transmitted to the cutter 19 in the same manner as the lawnmower M ₁ .
The As of the mower M _2, is better to a front wheel and a drive wheel is believed to have excellent straight traveling property.

The cutting unit U described above is merely an example, and the present invention is not limited to this structure.

[Effect of device]

In the walking lawn mower according to the present invention, a pair of cutting units are attached to the machine body in a lateral direction orthogonal to the traveling direction of the machine body at intervals narrower than the effective cutting width of the cutting unit, and one row is separated. Since it is designed to be able to mow two rows at the same time, the cutting unit doubles the work efficiency compared to one single mower, and the lawn mower is based on the mowing line of the row immediately before mowing. Since the number of times the vehicle is run is halved, the accumulation of the error in the traveling position of the lawn mower with respect to this cutting line is halved, and the amount of deviation of the boundary line of each strip of the lawn surface cut with respect to the reference line is halved. As a result, the boundary line of each strip does not meander greatly, and a beautiful zebra pattern can be formed on the grass surface.

In addition, the lawnmower according to the present invention is a walking type, even though it has two cutting units attached to the body, and therefore the weight of the body (and thus the total weight) is greater than that of a riding type. In addition to the above-mentioned effects, there is an effect that damage to the lawn is reduced when "zebra mowing" is performed on the green of the golf course.

[Brief description of drawings]

FIG. _{1 is} a plan view of a lawn mower M _{1 according} to the present invention, FIG. 2 is a right side view of the same, FIG. 3 is a schematic view of a cutting unit U seen from the rear, and FIG. Connecting pin 11
5 is an enlarged cross-sectional view of the portion of FIG. 5, FIGS. 5 (a) and 5 (b) are views for explaining the lawn mowing condition of the lawn mower M _{1 on} the outward path and the return path, and FIG. 6 is a lawn mower according to the present invention. FIG. 7 is a perspective view of the lawn surface cut by M ₁ , and FIG. 7 is a plan view of another lawn mower M ₂ according to the present invention. The description of the reference numerals of the main parts constituting the present invention is as follows. A: Uncut, L ₁ : Cutting line L ₂ : Boundary line, M ₁ , M ₂ : Lawn mower P: Direction of movement of the machine U: Cutting unit, 1: Machine 19: Cutter

Claims (1)

[Scope of utility model registration request] 1. A pair of cutting units are mounted on a machine body at a distance narrower than an effective cutting width of the cutting unit in a lateral direction orthogonal to a traveling direction of the machine body, and two cutting sections are cut simultaneously. A double walk-type lawn mower characterized by being able to take off.