JP3418099B2 - Hair clipper-type reaper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable blade comprising a knife bar and a blade body attached to the fixed blade while the front and rear end faces of the knife bar are individually guided by a pair of front and rear guide portions provided on the fixed blade side. The present invention relates to a clipper-type cutting device configured to slide and reciprocate.

[0002]

2. Description of the Related Art In a conventional hair clipper type cutting device, for example, as disclosed in Japanese Patent Laid-Open No. 7-322738, the fixed blade is formed by a plate-shaped plate material, and one blade is formed on the fixed blade. It was constructed by stacking plate-shaped movable blades from above.

[0003]

However, in the above-mentioned structure, the sharpness is poor when the gap between the fixed blade and the movable blade is set too large, and the movement of the movable blade is bad when the gap is set too small. It was difficult to set the gap.

The object of the present invention is to maintain sharpness,
The point is to provide a clipper-type cutting device that does not require a precise gap between the fixed blade and the movable blade.

[0005]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] A movable blade formed by attaching a blade to a knife bar slides back and forth with respect to the fixed blade while the front and rear end surfaces of the knife bar are individually guided by a pair of front and rear guide portions provided on the fixed blade side. In the hair clipper-type cutting device configured to perform, the fixed blade is divided into a plurality of unit blades in the cutting width direction.
Split configuration, each unit blade can be attached to the tool post.
The number of support blades and the slide movement space of the movable blade are sandwiched.
A plurality of folding blades located on the side opposite to the supporting blade portion
Sections and their corresponding support blades and
The front ends are connected and fixed together to form the
Stalks to be cut between adjacent blades of the blade
To form an introduction recess for introducing the
The rear end parts are integrally formed to control the depth of penetration of the introduction recess.
And the rear edge of the integrally formed end.
It is formed on the guide portion on the front side.

[Operation] [a] The fixed blade includes a supporting blade portion attached to the tool rest and a folding blade portion arranged on the opposite side of the supporting blade portion with the sliding movement space of the movable blade interposed therebetween. Therefore, it is possible to prevent floating of the movable blade from the fixed blade, and cut the stem culm to be cut at two positions, above and below the planned cutting site, above and below, to make it difficult for the culm to escape. can do.

[B] Since the rear edge of the folding blade portion is formed in the front guide portion that guides the front end surface of the knife bar, for example, FIG. 4 of JP-A-7-322738.
As disclosed in, in order to configure the guide portion on the front side, the knife clip is omitted as compared with a knife clip having a rear end attached to the fixed blade side and a guide member being riveted to the front end. Therefore, the number of parts can be reduced.

[Effect] Therefore, it is not necessary to strictly set the gap between the movable blade and the fixed blade by the action [a], and yet stable cutting performance can be maintained, and by the action [b], the structure It was possible to provide a clipper-type cutting device that can be simplified.

The structure, operation, and effect of the invention according to claim 2 are as follows.

[Structure] In the invention according to claim 1,
The fixed blade and the movable blade have a blade angle of approximately 30 ° in a plan view.
Is set to.

[Operation] In addition to the same operation as the operation according to the first aspect, the blade angle of the fixed blade and the movable blade in plan view is set to about 30 °. Is smaller than, for example, about 10 °, the component force of the cutting resistance acting on the blade surface from the direction perpendicular to the blade surface in plan view becomes smaller.

[Effects] Therefore, in addition to the same effects as the effects according to the first aspect, the durability of the fixed blade and the movable blade can be improved.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A mowing device A mounted on a self-removing combine will be described. As shown in FIG. 1, the reaping device A has a tool rest 2 installed over a plurality of support frames 1 extending in the machine front-rear direction, and a fixed blade B and a plurality of knife bars 4 are provided on the lower end of the tool rest 2. The movable blade C having the blade body 5 attached thereto is guided by the pair of front and rear guides 7 and 8 provided on the fixed blade B side while the front and rear end surfaces of the knife bar 4 are individually guided. In contrast, it is provided so as to slide back and forth to the left and right.

The fixed blade B is constructed by attaching a plurality of unit blades 3 to the tool rest 2. As shown in FIGS. 2, 3 and 4, each unit blade 3 is attached to the tool rest 2. The support blade portion 3A and the folding blade portion 3B located on the opposite side of the support blade portion 3A with the sliding movement space of the movable blade C interposed therebetween. Specifically, the folding blade portion 3B is provided at the tip of the supporting blade portion 3A.
The front edges of the blades are overlapped with each other and riveted, and the folding blade portion 3B is raised in a state of maintaining a constant distance from the front end side to the supporting blade portion 3A and extends rearward in a cantilevered manner to form a cantilever. A rear end extending in a shape of a circle is integrally formed with a rear end of an adjacent folding blade portion 3B, and a rear end edge of this integrally formed portion (hereinafter referred to as an integrally formed end E) is the guide portion on the front side. 7
It is formed on. The integrally formed end portion E and the pair of folding blade portions 3B form an introduction recess F for introducing a stalk, and the stem stalk guided into the introduction recess F is restricted from entering at the integrally formed end portion E. Be positioned.

Blades 3a and 3b that are obliquely cut are formed at the side edges of the support blade portion 3A and the folding blade portion 3B to improve the cutting performance of the stem. Since the supporting blade portion 3A and the folding blade portion 3B are required to have toughness, they are both made of tool steel. Although the supporting blade portion 3A and the folding blade portion 3B are riveted at the tip end side, they may be fixed by welding by spot welding or the like.

Explaining the movable blade C, the rear receiving plate 8 for guiding the rear surface of the knife bar 4 in the left-right direction.
A rear end (corresponding to the guide portion) is fixed to the tool rest 2 with a bolt, and a connector 9 is attached to one end of the knife bar 4 as shown in FIG.
Is attached and fixed, and a drive guide portion 9A for receiving a drive force is formed on the rear surface of the coupling tool 9. A guide wheel 10A is rotatably fitted to the drive guide portion 9A, the guide wheel 10A is attached to one end of the crank arm 10, and the crank arm 10 is driven and rotated by the power from the prime mover of the combine to drive the drive guide portion. 9A and the knife bar 4 are driven to reciprocate the movable blade C with respect to the fixed blade B with a constant stroke. The blade body 5 that constitutes the movable blade C is made of tool steel because it requires high toughness.

The blade angles of the fixed blade B and the movable blade C in plan view are set to about 30 ° so as to sufficiently withstand the cutting resistance.

[Other Embodiments] As a form of the fixed blade B, as shown in FIGS. 5, 6 and 7, three pairs of support blade portions 3A and folding blade portions 3B are formed to form the unit blade 3 May be There is no limitation on the number of the support blade portions 3A and the folding blade portions 3B. The fixed blade B may be made of hardened steel other than tool steel.

[Brief description of drawings]

FIG. 1 is a plan view showing a reaping device.

FIG. 2 is a perspective view showing a fixed blade.

FIG. 3 is a vertical side view of the mowing device.

FIG. 4 is a vertical sectional front view of a movable blade and a fixed blade.

FIG. 5 is a perspective view of another embodiment.

FIG. 6 is a plan view of another embodiment.

FIG. 7 is a vertical sectional front view of another embodiment.

[Explanation of symbols]

2 Turret 3 Unit blade 3A Support blade 3B Folding blade 4 Knife bar 5 Blades 7, 8 Guide B Fixed blade C Movable blade E Integrated formation end F Introduction recess

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-7-322738 (JP, A) JP-A-1-309615 (JP, A) Actual development Sho-55-65959 (JP, U) Actual extension 5- 60225 (JP, U) Actual development Sho 59-98727 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A01D 34/02-34/408

Claims (2)

(57) [Claims] 1. A movable blade having a blade body attached to a knife bar slides and reciprocates with respect to the fixed blade while the front and rear end surfaces of the knife bar are individually guided by a pair of front and rear guide portions provided on the fixed blade side. In the hair clipper type cutting device configured as described above, the fixed blade is divided into a plurality of unit blades in the cutting width direction.
Multiple unit blades that can be attached to the tool post.
In front of the support blade part and the sliding movement space of the movable blade
With a plurality of folding blades located on the opposite side of the support blade
From the front ends of their corresponding supporting and folding blades
The unit is formed by connecting and fixing the parts together.
Guide the culm to be cut between adjacent blades on the blade.
Forming the introduction recess to enter, and the rear end of each folding blade
The parts are integrally formed to define the depth of penetration of the introduction recess.
And the rear edge of the integrally formed end is the front side.
A clipper-type cutting device formed on the guide part of the . 2. The clipper-type cutting device according to claim 1, wherein the blade angles of the fixed blade and the movable blade in plan view are set to about 30 °.