JPH10234216A - Cutter for mowing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the required kinds of possessed cutters and to eliminate the need of the exchange work of cutters performed every time a reaping system is changed, by using one kind of a metal cutter also as a nylon cutter. SOLUTION: An insertion hole is provided in the appropriate part of the metal cutter C1 provided with a blade part on the peripheral edge part of a metal thin disk body for performing high speed rotation, a nylon cord N1 is withdrawably inserted to the insertion hole and the nylon cord N1 is pulled in a radiation direction by the high speed rotation of the metal cutter C1 and made to function as the nylon cutter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the mowing of grass by mounting at the tip of an operating rod of a hand-held mower or the lower part of a self-propelled mower. More specifically, the present invention relates to a mowing cutter in which a nylon cord is extended by high-speed rotation of a metal cutter so that mowing by a nylon cutter can be performed.

[0002]

2. Description of the Related Art In either a hand-held or self-propelled mower, the cutter is roughly classified into a metal cutter having a blade portion provided on a peripheral portion of a thin metal disk body,
As shown in FIGS. 13 and 14, there is a nylon cutter C ′ having a configuration in which a nylon cord N ′ is inserted into an insertion hole 62 provided in a rotating body 61. By rotating the former metal cutter at a high speed, it is used for cutting grass growing in a place where there is no obstacle around. On the other hand, the latter nylon cutter C ′ stretches the nylon cord N ′ in the radial direction by the centrifugal force due to the high-speed rotation of the rotating body 61 and impacts the grass against the grass to thereby impact the grass. It is a structure that reaps kinds.

As described above, according to the nylon cutter,
Even when there are obstacles such as buildings, metal nets, and utility poles in the surrounding area, the nylon cord that rotates at high speed while receiving centrifugal force changes freely even if it is hit against these obstacles. Damage to the nylon cord itself. However, the nylon cutter having such an advantage has a disadvantage that the efficiency of cutting is low. On the other hand, the metal cutter has the advantage of high mowing efficiency, but when it comes into contact with the obstacle, it is damaged by the impact force, and its fragments are scattered to the surroundings so that workers and the like are greatly damaged. At the same time as damaging the building, there is a risk of damaging buildings, utility poles and the like.

[0004] With any conventional hand-held or self-propelled mower, it is possible to cut with both a metal cutter and a nylon cutter, but it is possible to change from a metal cutter to a nylon cutter or vice versa. hand,
Each time the cutting method was changed, it was necessary to re-attach the cutter. That is, in the conventional cutter mounted on the mower, the metal cutter and the nylon cutter are individually provided, and the user needs to hold each cutter, which increases the cost and increases the cost. It is also troublesome to exchange different cutters and attach them to the body or the operation rod.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention makes it possible to use one kind of metal cutter as a nylon cutter, to reduce the number of required types of cutters, and to carry out every time the cutting system changes. The main task is to eliminate the necessity of exchanging cutters, which has been done.

[0006]

According to the present invention, there is provided a hand-operated type mowing machine comprising:
Or a mowing cutter for cutting grass by mounting at the lower part of the body of a self-propelled mowing machine and rotating at high speed, and providing a blade portion at a peripheral portion of a metal disk body that rotates at high speed. An insertion hole is provided at an appropriate position of the metal cutter, a nylon cord is inserted through the insertion hole so that the nylon cord can be pulled out, and the nylon cord is radially stretched by high-speed rotation of the metal cutter to function as a nylon cutter. Its features.

When the metal cutter is used as a nylon cutter, the nylon cord is inserted through an insertion hole provided in the metal cutter so that the nylon cord does not come off due to the centrifugal force generated when the metal cutter rotates at a high speed. It only needs to be fixed. When a metal cutter in which a nylon cord is inserted through an insertion hole is used as an original metal cutter, it is only necessary to simply pull out the nylon cord from the insertion hole. Therefore, a nylon cord can be attached to the metal cutter while the metal cutter is still attached to the lower part of the body of the self-propelled mower or the tip of the operating rod of the hand-held mower. Unlike a cutter, it is not necessary to remove the metal cutter and the nylon cutter each time the cutter is replaced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples. FIG. 1 shows a state in which a metal cutter C ₁ equipped with a nylon cord N ₁ is attached to a tip end of an operation rod 31 of a hand-held operation type mower M ₁ , and grasses G growing near a building H are cut off. FIG. 2 is a perspective view of
Is a side view of a state of mounting the metal cutter C ₁ fitted with a nylon cord N ₁ to the distal end of the operating rod 31 of the mower M ₁ handheld operated, FIG. 3, nylon cord N ₁
Is a perspective view of a metal cutter C ₁ fitted with a, Figure 4,
It is sectional drawing of the part of the similar insertion hole 4. Metal cutter C
₁ is a thin metal disc 1 as shown in FIGS.
A plurality of substantially square-shaped sheets are provided on the periphery of the
And a mounting hole 3 is provided at the center of the blade plate 2, which is conventionally used.

In the present invention, the metal cutter C ₁
A central portion of each blade plate 2 along the circumferential direction,
Moreover, its own peripheral portion 2a is more than the central portion along the radial direction.
The insertion hole 4 is provided in a portion close to. On the other hand, the nylon cord N ₁ has a substantially circular cross section,
In this configuration, a ball portion 5 for retaining is integrally provided at the base end portion. Then, in attaching the nylon cord N ₁ to the portion of the blade plate 2 of metal cutter C _1, as shown in FIG. 4, the tip of the nylon cord N _1, the blade plate 2
When the blade 5 is inserted downward from the upper surface of the blade plate 2 and pulled downward, the ball 5 integrally provided at the base end of the blade 4 is formed on the upper surface of the blade plate 2. by being fastened caught on parts, nylon cord N ₁ is attached to the portion of the blade plate 2 of metal cutter C _1.

On the other hand, to remove the nylon cords N ₁ mounted on a portion of each blade plate 2 of metal cutter C ₁ may only pull out just the ball portion 5 upwardly. in this way,
Removable nylon cord N ₁ to the metal cutter C ₁ is extremely easy and, as shown in FIG. 2, a metal cutter C ₁ to the mounting portion of the tip of the operating rod 31 of the mower M ₁ handheld operated It can be done while wearing it.

[0011] mower M ₁ handheld operated has been made in view of configuration reap grasses by a manual operation while supporting shoulder portion of the operator N, as shown in FIGS. 1 and 2,
Operating rod 31 distal various metal cutter to the cutter mounting portion 32 composed of a thin metal disc of the are detachably mounted, small engines E ₁ to the base end portion (upper end portion) of the operating rod 31 is integrally attached to the power of the small engine E ₁ passes through the operating rod 31 to the interior supported transmission shaft (not shown), is transmitted the interior supported rotary shaft to the cutter mounting portion 32 (not shown) In addition, various kinds of metal cutters mounted on the rotating shaft are rotated at high speed. A protective cover 33 is provided at the tip of the operating rod 31 to cover and protect a portion of the various metal cutters mounted on the part on the operator's side, and the center of the operating rod 31 in the longitudinal direction is provided. to the side in closer portion of the engine E ₁ than parts, operating handle 34 is bifurcated upward is integrally provided.

Then, the metal cutter C ₁ is attached to the tip of the operating rod 31 of the hand-held type mower M ₁ ,
The nylon cord N ₁ mounted on the cutter C ₁ to function as a nylon cutter, in reaps grasses G that has grown close to the obstacle such as a building H, performed as follows. As shown in FIG. 1, while the mowing machine M ₁ is entirely supported by a shoulder band 35 hooked on the shoulder of the worker N, the operating handle 34 is operated with both hands, and It carried close to the grass G that has grown a metal cutter C ₁ which is mounted rotating at high speed to the nearby building obstacles such as H. Each blade plate 2 of metal cutter C ₁
Each nylon cord N ₁ attached to the portion is stretched under radial tension by centrifugal force based on high-speed rotation, and in this state, when the nylon cord N ₁ is hit against the grass G, The grass G is cut by the impact force. That is, nylon cord N ₁ mounted on a metal cutter C ₁ functions as nylon cutter.

When the metal cutter C ₁ is used as an original metal cutter, the metal cutter C _{1 is connected} to the cutter mounting portion 3 at the tip of the operating rod 31 as described above.
While wearing a 2, it may simply pulled out of the nylon cord N ₁ mounted on a portion of its respective blade plates 2. Therefore, without removing the metal cutter C _1, make changes in the cutting method of the metal cutter and nylon cutter.

Further, the mounting structure of the nylon cord to said portion of the blades 2 of metal cutter C ₁ are various mentioned other than the above. For example, in the mounting structure shown in FIGS. 5 and 6, two insertion holes 4a and 4b are provided in the blade plate 2 at predetermined intervals along the radial direction of the thin metal disk member 1, and the nylon metal thin disk body tip portion of the code N ₁ 1
After being inserted from below the insertion hole 4a on the side close to the center of
This is a structure in which the ball 5 at the base end is hooked on the lower peripheral portion of the insertion hole 4a by being inserted downward from above the other insertion hole 4b. In this mounting structure, nylon cord N ₁
Is hooked on the blade plate 2 by both the bent portion of the base end portion of the base member 5 and the ball portion 5, the nylon cord N
₍₁₎ The retaining strength increases. Further, in removing the nylon cords N ₁ from the portion of the blade plate 2 of metal cutter C ₁ is
Pull the ball portion 5 at the base end downward and insert the through holes 4a, 4b
Nylon cord N ₁ from the portion of the may merely pulled out.

FIGS. 7 and 8 show a metal cutter C.
Another mounting structure of nylon cord N ₂ are shown for _one of the blades 2. The blade plate 2 of metal cutter C ₁ includes two insertion holes 4a, 4b are provided at predetermined intervals along the circumferential direction of the thin metal disk body 1, 1 having no ball portion at an end portion am authorized Of the nylon cord N ₂ is inserted downward from above the insertion holes 4a and 4b into the nylon cord N _2.
Is hooked between the insertion holes 4a and 4b. Also, from the portion of the blade plate 2 of metal cutter C ₁ to remove the nylon cords N ₂ has two insertion holes 4a, 4
Loosen the central portion of the nylon cords N ₂ that is hooked to part b, the insertion holes 4a, nylon cord from 4b N
Simply pull out ₂ .

[0016] FIGS. 9 and 10, the nylon cord N ₁ to another metal cutter C _2, C ₃ is a perspective view of a state of being mounted. The metal cutter C ₂ is a thin metal disk 1
A plurality of cuts along the radial direction are provided at a constant interval along the circumferential direction at the outer peripheral edge portion of the first metal plate. This is a configuration in which a mounting hole 13 is provided. Then, the portion of each blade portion 12 provided on the metal thin disk body 11, an insertion hole 14 is provided in one every is the nylon cord N ₁ is inserted into the insertion holes 14, the ball portion 5 Is hooked on the periphery of the insertion hole 14. In addition, metal cutter C ₃
A number of sawtooth-shaped blade portions 22 are continuously provided on the outer peripheral edge of the thin metal disk body 21, and the mounting hole 2 is provided at the center thereof.
3 is provided. A plurality of insertion holes 24 are provided at regular intervals along the circumferential direction in a portion slightly inside the blade portion provided on the outer peripheral portion of the thin metal disk body 21. nylon cord N ₁ and is inserted, the ball portion 5 of the base end portion is hooked on the periphery of the insertion hole 24.

In each of the metal cutters C ₂ and C ₃ , the nylon cord N ₁ is inserted into the insertion holes 14 and 24.
When the ball portion 5 is hooked on the peripheral portions of the insertion holes 14 and 24, it functions as a nylon cutter. When used as an original metal cutter, each of the insertion holes 1 of the thin metal discs 11 and 21 is used.
It may simply pulled out of the nylon cord N ₁ from 4,24.

In each of the use examples described above, the present invention is applied to the metal cutters C _{1 to} C ₃ mounted on the hand-held type mower M ₁ . it is also applicable to mowing cutter mounted on mower M _2. 11 and 12 are a front view and a plan view of a self-propelled mower M ₂ of the mowing cutter is mounted according to the present invention, respectively. Mower M ₂ of the self-propelled, the drive wheel 43 to the both ends of the axle 42 which is horizontally supported on the rear portion mounted to the body frame 41, a cutter shaft 44 is bearing body 45 to a front portion of the body frame 41 The metal cutter C ₁ is supported vertically through the lower end of the cutter shaft 44.
Is attached, and a pulley 48 is attached to a cutter drive shaft 47 projecting directly below the transmission 46.
8, the belt 51 is hung between the pulleys 49 mounted on the upper end of the cutter shaft 44, the power of the engine E ₂ mounted on the machine body frame 41 is decelerated through the transmission 46 Transmitted to the axle 42,
A pair of drive wheels 43 are rotated at a low speed, the power of the engine E ₂ are, are transmitted to the cutter drive shaft 47 without being almost decelerated, metal cutter C ₁ is in the configuration that is high speed. Further, in the mounted state of the metal cutter C _1, a portion of the metal cutter C _1, than the foremost part of the body frame 41 has a structure that protrudes forward, this structure, obstructions such as buildings H It is possible to cut grass G that grows nearby.

Further, the rear portion of the body frame 41, and frame-shaped operating handle 52 toward the obliquely upward are provided integrally on the upper end of the operating portion 52a of the handle 52, of the engine E ₂ power The clutch levers 53 and 54 for operating the respective clutches (not shown) for transmitting the torque to the axle 42 and the cutter drive shaft 47 are provided. Further, the lower end of the cutter shaft 44, a metal cutter C ₁ directly to the ground guide body 55 for preventing the contact with the ground is provided integrally, the metal in the plane of the upper surface of the ground guide body 55 in a state where the cutter C ₁ is placed, a metal cutter C ₁ is attached to the cutter axis 44. In the drawing, reference numeral 56 denotes a tension pulley for applying tension to the belt 51.

To cut grass growing near obstacles such as the building H using the metal cutter C ₁ as a nylon cutter, the metal cutter C ₁ was attached to the metal cutter C ₁ at the tip of the body frame 41. nylon cord N ₁ is in the degree of contact with the obstacle such as a building H, the mower M ₂ is the obstacle and opposite, in this state, the travel of the body is stopped, the cutter shaft power of the engine E ₂ 44 only by transmission to, performing metal cutter C ₁ mounted thereto is rotated at a high speed. Then, by appropriately rotating the drive wheels 43 forward and backward by the clutch lever 53, and moving the body frame 41 forward and backward, the body frame 41 is moved in the lateral direction to cut the grass growing along the obstacle. Do.

In order to use the metal cutter C ₁ as the original, the nylon cord N ₁ is pulled out from the metal cutter C ₁ , and a pair of drive wheels 43 and a cutter shaft 44 are used.
Are driven and rotated, and while the body frame 41 is self-propelled, the grass is cut at a portion where there is no obstacle. Also in mower M ₂ of the self-propelled, the cutter shaft 4
Metal cutter C ₁ while wearing the 4, by inserting the nylon cord N ₁ into the insertion hole 4 of the metal thin disk body 1, the metal cutter C ₁ can also be used as nylon cutter. For this reason, even if the cutting method is changed between the metal cutter and the nylon cutter, there is no need to replace the cutter.

In the above-described embodiment, three types of metal cutters are shown. However, a blade is provided on the peripheral edge of the thin metal disk, and is provided at an appropriate position on the thin metal disk. The metal cutter may have any structure as long as the structure allows the nylon cord to be inserted into the insertion hole and fastened.

[0023]

According to the mowing cutter of the present invention, an insertion hole is provided at an appropriate position of a metal cutter provided with a blade at a peripheral portion of a metal disk body which rotates at a high speed, and a nylon cord is pulled out through the insertion hole. The nylon cord is radially stretched by high-speed rotation of a metal cutter,
Because it can function as a nylon cutter,
One kind of metal cutter can be used as a nylon cutter, and the number of cutters to be held can be reduced.

When the metal cutter is used as a nylon cutter, it is only necessary to insert and fix the nylon cord into the insertion hole provided in the metal cutter, and the nylon cord is inserted into the insertion hole. When the metal cutter is used as an original metal cutter, the nylon cord need only be pulled out from the insertion hole. Therefore, a nylon cord can be attached to the metal cutter while the metal cutter is still attached to the lower part of the body of the self-propelled mower or the tip of the operating rod of the hand-held mower. Like a cutter, every time the cutting method is changed between a metal cutter and a nylon cutter, there is no need to remove and replace the cutter,
Quick response to changes in the cutting system.

[Brief description of the drawings]

[1] Metal cutter C equipped with a nylon cord N ₁
Wearing the ₁ to the distal end of the operating rod 31 of the mower M ₁ handheld operated is a perspective view of a state in which harvests grasses G growing in a nearby building H.

[Figure 2] Metal cutter C equipped with a nylon cord N _1
1 is a side view of a state in which attached to the distal end of the operating rod 31 of the mower M ₁ handheld operated.

[3] Metal cutter C equipped with a nylon cord N _{1
1 is} a perspective view of FIG.

FIG. 4 is a sectional view of a similar insertion hole 4 part.

[5] Nylon Cord N ₁ to the metal cutter C ₁
FIG. 10 is a partial plan view showing another mounting structure of FIG.

FIG. 6 is a sectional view taken along line XX of FIG. 5;

FIG. 7: Nylon cord N ₂ for metal cutter C ₁
FIG. 15 is a partial plan view showing still another mounting structure of FIG.

FIG. 8 is a sectional view taken along line YY of FIG. 7;

[9] Metal cutter C equipped with a nylon cord N ₁
FIG. _{2 is} a perspective view of FIG.

10 is a perspective view of a metal cutter C ₃ equipped with a nylon cord N _1.

[11] Metal cutter C having a nylon cord N _1
1 is a front view of a mower M ₂ of the self-propelled mounted.

FIG. 12 is a plan view of the same.

FIG. 13 is a plan view of a conventional nylon cutter C ′.

FIG. 14 is a sectional view of the same.

[Explanation of symbols]

C ₁ -C _3: Metal cutters G: grasses N _1, N _2: Nylon cord 1, 11, 21: metal thin disk body 5: Ball of nylon cord 4,14,24: insertion hole

Claims (2)

[Claims] 1. A mowing cutter mounted on the tip of an operating rod of a hand-held mower or a lower part of a body of a self-propelled mower and rotated at high speed to cut grass. An insertion hole is provided at an appropriate position of a metal cutter provided with a blade portion at a peripheral portion of a metal disk body that performs high-speed rotation, and a nylon cord is inserted through the insertion hole so that it can be pulled out. A mowing cutter characterized in that the nylon cord is radially stretched to function as a nylon cutter. 2. A nylon cord mounting portion of a metal cutter is provided with only one insertion hole, and a nylon cord provided with a retaining ball portion at a base end portion is inserted through the insertion hole from a distal end portion thereof. 2. The mowing cutter according to claim 1, wherein the ball portion is inserted into the cutter and the ball portion is hooked on a peripheral portion of the insertion hole.