JPS6274219A - Reaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 'ff! fJ・TE field] Kisadaaki is related to Karikomikin.

〔figure? Traditionally, mowing machines have fixed blades (A) with multiple comb teeth (A).
(B) and a movable blade (D) formed with a plurality of comb teeth (C) that slides into contact with the fixed blade (B).As shown in FIG. The cutting edge angle (θ,) consisting of the rake (g) of the comb teeth (a) and the sliding surface (ch) of the fixed blade (b) located on the opposite side to the protruding direction of the movable blade (
It is formed larger than the cutting edge angle (θ2) made up of the rake face (e) and sliding surface (he) of the comb teeth (c) in (d), which reduces the fixed force (b) and the movable blade (d). When cutting Toko technique 1 (), the tip angle (θ2) of the comb teeth (C) of the movable blade (2) is small, so in the cutting technique II, -iT moving blade (2) contributes to the rotation, and at that time, The force applied to the comb teeth (c) of the movable blade (d) is the force FN in the direction perpendicular to the comb teeth (c), the force FN in the direction perpendicular to the comb teeth (c), and the force <I''f'1 1 Kaμ・FN, and lγ (hole I; The comb teeth (C) were displaced to the comb teeth (A) side, so Technique 11
As the cutting progresses, the cut surface becomes as shown in part (A) of Fig. 7. Also, with the fixed blade (B), the blade edge angle (01
) is large, it is not easy for the cutting edge to enter into the 11th technique, and the comb teeth (A) collide with the technique 1, which crushes the branch!■ and destroys the technique 11. The result is as shown in part (B) of the figure.When the comb teeth (A) of the fixed blade (B) and the comb teeth (C) of the movable blade (D) come into sliding contact, the +i teeth ( C) is prevented from moving toward the comb teeth (A) of the fixed blade (B), so the cut surface becomes as shown in Figure 7 (C).However, as a result, the remaining branches It. The shape of the cut surface on the other side is concave at parts (A> and (C)), and rain, water, etc. accumulate in the recesses and become susceptible to rot, and the fixed blade (
There was a problem in that the comb teeth (b) in part (B) destroyed the technical structure in part (B), making it more likely to wither.

[Purpose of the invention]

The present invention has been made in view of the problems listed in item L, and it is an object of the present invention to provide a mowing machine that is less likely to rot or wither.

[Disclosure of the invention]

Embodiments of the present invention will be described below with reference to FIGS. The fixed blade 1 unit is made of HV650 blade steel, such as Tamaguri and stainless steel. If several Fra teeth 2 are arranged in parallel at equal intervals. The comb teeth 2 are formed into a substantially trapezoidal cross section, and have a rake 3 and a sliding surface 4.
The cutting edge angle (θ, ) is formed to be 60 degrees. Movable blade 5 that slides back and forth in sliding contact with the lower surface of fixed blade 1
is made of cutter steel such as tool steel or stainless steel with a hardness of HV 650, and a plurality of comb teeth 6 arranged in parallel at equal intervals are coated with ceramic Ji having a hardness of HV 2000. The comb teeth 6 of the movable blade 5 are formed to have a substantially trapezoidal cross section, and the cutting edge angle (
θ2) is smaller than the cutting edge angle (θl) of fixed blade 130
It is formed at the same time. The movable blade 5 is connected to a drive section 9. The drive unit 9 has a motor 10 and an output shaft 1 of the motor lO.
1, a second gear 13 that meshes with the first gear 12, a third gear 14 that meshes with the second gear 13, and a gear that is attached to the third gear 14. It is composed of an eccentric bin 15. The movable blade 5 is formed with an elongated bearing portion 16 into which the eccentric pin 15 engages, and the fixed blade l is formed with an opening 17 into which the eccentric pin 15 is loosely fitted. The main body case 19, which is formed by protruding upwardly the drive unit housing chamber 18 that accommodates the drive unit 9, is made of synthetic citrus material for 2 minutes υ.
1 and a fixed blade 1 and a movable blade 5 at the bottom end.
A flat part 20 is formed to which the handle is attached, and a handle 21 is formed at the rear end. A fixed blade 1, a movable blade 5, and a force 22 are stacked one on top of the other on the plane part 20 and removed by a screw 23. , J+J, and the fixed blade 1, movable blade 5, cover 22, and S protrude to the front of the main body case 19. A hammer portion 24 corresponding to the comb teeth 2 of the fixed blade 1 is formed on the cover 22. A power switch 25 is provided on the handle 21S.

In this way, the cutting edge angle (θ2) of the comb teeth 6 of the movable blade 5 is changed to the cutting edge angle (θ2) of the comb teeth 2 with a fixing force of 1)t! If the value is smaller than 1γ(θ, ), the area occupied by part (I3) in FIG. 4 becomes smaller, and part (A) becomes larger, making it possible to reduce the cutting resistance. In addition, if the comb 22 formed with the hammer part 2.1 corresponding to the comb teeth 2 of the fixed blade L is not provided, the technique H on the remaining technique side is Bend at an angle (β) n, bending load numerator of the lever t? Although i increases, if the cover 22 is provided, as shown by the solid line in Fig. 4, it is possible to reduce the amount of work remaining (cutting 1 because it prevents Qll's work I (cutting 1) from being bent) and the load, as shown by the solid line in Fig. 4. .

〔motion〕

Next, a description will be given of the cutting condition of technique H using δ in the mower of the present invention. The cutting edge angle (θ2) of the comb teeth 6 of the movable blade 5 located on the opposite side to the protruding direction of the drive unit housing chamber 18 is formed to be smaller than the cutting edge angle (θ1) of the comb teeth 2 of the fixed blade 1. , when the fixed blade 1 and the movable blade 5 cut the technique,
Since the cutting edge angle (θ2) of the comb teeth 6 of the movable blade 5 is small, the cutting of technique 11 (Yoka (lJ + blade 5) mainly contributes, and at that time,
The force applied to the loss 1"+j6 of the movable blade 5 acts on the force FN in the direction perpendicular to the rake face of the comb 1h6 and the rake 7<1?
(Gravity is u - F N, and a frictional force FN'' is generated on the IF? moving surface, and the force Rv acting in the direction of superposition of the comb teeth 2 and 6 causes the comb teeth 6 to move 1 box mountain 21!1. 11, the cutting of the branch 11 progresses, and the cut surface becomes as shown in part (A) in Fig.
1) is large, so it is not easy for the cutting edge of Technique Il~ to penetrate, but it becomes like the part ([3) in Figure 5], and the crushed part due to collision between Technique H and comb teeth 2 is removed. It will be done. When the comb teeth 2 of the fixed blade l and the hi teeth 6 of the movable blade 5 come into sliding contact,
Since the comb teeth 6 of the movable blade 5 are prevented from moving toward the comb teeth 2 of the fixed blade 1, the cut surface becomes as shown in FIG. 5(C). As a result, the cut shape on the side where technique H remains is convex.

・: Effect of the invention] As described above, the mowing machine according to the present invention includes a fixed blade formed with a plurality of comb teeth, and a plurality of 4'1i comb teeth in sliding contact with the fixed blade.
A movable blade formed with i-teeth, a drive unit that reciprocates the movable blade, and a main body case in which a drive unit storage chamber for accommodating the drive unit projects upward and the fixed blade and the movable blade are attached to the lower end. and a cutting edge angle formed by the rake surface and sliding surface of the blade located on the opposite side to the protruding direction of the drive unit storage chamber, and a cutting edge angle formed by the rake surface and sliding surface of the other blade. Since it is characterized by being smaller than the horn, the remaining cut surface when mowing with this mower has a convex shape, which prevents rain and water from accumulating and causing the branch to rot. In addition, there is an effect that there is no destruction of the technical organization and there is no withering.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the mowing machine of the present invention, Fig. 2 is a partially enlarged view of the fixed blade and movable blade of the same mowing machine, and Fig. 3
The figure is a partially cross-sectional side view of the same mower as above, Figure 4 is a diagram of the cutting state of branches, Figure 5 is a diagram of the cutting shape of the technique, Figure 6 is a diagram of the cutting state of branches in the conventional example, and Figure 7 is a diagram of the cutting state of branches in the conventional example. The figure shows the cutting shape of the technique in the conventional example. 61. Fixed blade, 2. Comb teeth, 3.
・Rake face. 4. Sliding surface, 5. Movable blade, 6. Comb teeth, 7. Comb surface 58 sliding surface, 9. Drive section, 18 Drive section housing chamber. Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] 1) a fixed blade formed with a plurality of comb teeth, a movable blade in sliding contact with the fixed blade and formed with a plurality of comb teeth, a drive unit that reciprocates the movable blade; A comb comprising a main body case in which a drive part accommodation chamber for housing a drive part projects upward and the fixed blade and the movable blade are attached to the lower end, and the blade comb is located on the opposite side with respect to the protruding direction of the drive part accommodation chamber. A cutting machine characterized in that a cutting edge angle made up of a rake face and a sliding surface of a tooth is formed smaller than a cutting edge angle made up of a rake face and a sliding face of a comb tooth of the other blade. 2) The mowing machine according to claim 1, wherein the rake angle of the movable blade is smaller than the rake angle of the fixed blade.