JPH0445467Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a harvester claw used in a grain culm pulling device or ear conveying device in a reaper, binder, combine harvester, etc.

<Prior Art> As shown in FIG. 3, the claws conventionally used for the above purpose are tapered plastic claws 2 with a U-shaped cross section and whose base end is attached to a rotating chain 1. is widely known. In addition, the bottom surface of the U-shaped cross section is corrugated to prevent grain culms from slipping during lifting and transportation, or the tips are curved in the direction of movement of the claws, as shown in Figures A and B. Shapes are also known.

The claws are generally available in two to three different lengths, even from the same manufacturer, depending on the model and the position of use (for example, in a combine harvester's lifting device and tip conveying device).

<Problems to be solved by the invention> However, with the conventional claws as described above, the grain culms and ears do not engage well during lifting and transportation, and problems such as slipping and coming off during operation are likely to occur, as well as damage. When replacing nails, it is necessary to use nails of a predetermined length, resulting in inconveniences such as the need to keep two or three different lengths of nails in stock.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the claw for a harvester of the present invention has a base end attached to the chain 19 so as to be rotatable up and down, and a surface The upper surface of the side is used as the pressing part B to the grain culm during the grain culm lifting operation, and the grain culm is placed at an appropriate position on the proximal end side away from the tip of the claw 16 which has a U-shaped hollow cross section with the back side open. Convex portions or concave portions C ₂ and C ₃ are formed to engage with the grain culm during raising to prevent skidding, and the positions corresponding to the convex portions or concave portions C ₂ and C ₃ in the hollow cross section of the claw 16 are formed. , which partitions the inside of the hollow cross section of the claw 16, and when the claw 16 is cut along the projections or depressions C ₂ and C ₃ while leaving the projections or depressions C ₂ and C ₃ , the claw slopes downward toward the tip. Rib forming the tip surface of 16
It is characterized by the formation of D ₂ and D ₃ .

<Function> The uneven portions C ₁ to _{C 3} of the claws 16 prevent the grain culm in contact with the pressing surface of the claw 16 from slipping sideways and coming off when the grain culm is pulled up or transported by the claw 16. In addition to being an engaging part, the uneven part other than the tip
C ₂ and C ₃ serve as guidelines for cutting lines when cutting the claw 16 to obtain shorter pieces.

In addition, the ribs D ₂ and D ₃ serve to reinforce the claws 16, and when cut along the uneven portions C ₂ and C ₃ , the claws 16
This prevents the grain culm from getting caught in the claw during the lifting operation, or damage to the grain culm or the claw due to catching.

<Example> Fig. 2 is a perspective view of the main parts showing the attachment points of the claws in a combine harvester. The grain is cut by the cutting blade 17 at the bottom of the machine while being pulled up by the lifting claws 16a protruding from the inside of the cases 15, 15, and the lower part is gripped by the lower transport claw 16b and transported toward the threshing section. . At this time, the grain tip is scooped up by the grain conveying claw 16c while being guided by the guide 18 located at the upper position, and the grain culm and the grain tip are conveyed while forming a predetermined posture.

Each of the claws 16, 16a to 16c is used in a lifting device and an upper and lower conveying device, and in each device, as shown in FIG. The attachment part 20 to the endless chain inside is attached to the lifting case 1.
When running on the outside of 5, it is rotatably supported so that it can be folded up along the chain.

The claw 16 shown in FIG. 1A is made of plastic material with a U-shaped cross section, and the curved part that is a continuous part of both side walls A and A of the U-shaped cross section forms a pressing part B whose surface is pressed against the grain culm. , Convex portions (convex stripes in the embodiment) C ₁ to _{C 3} are formed at appropriate intervals from the tip of the pressing portion B, so that the grain is pressed against the grain culm and is pulled up or transported. It has a structure that prevents the culm from sliding sideways and coming off.

In the illustrated embodiment, the convex portions C ₂ and C ₃ are provided not only on the surface of the pressing portion B but also on the surfaces of the side wall portions A on both sides so as to extend toward the open end of the side wall portion A while being inclined toward the tip. It has a convex shape. Further, in the hollow interior of the pawl 16 where the convex portions (convex stripes) C ₂ and C ₃ are located, a rib D ₂ of constant wall pressure is provided so as to partition the grooved interior and along the shape of the convex portions C ₂ and C ₃ . , D ₃ is formed.

The ribs D ₂ and D ₃ are each formed such that their tips extend to the open ends of both the front and rear walls of the nail 16, and are structured so that the tips of the nails do not become open ends when cutting the nail.

<Effect of the invention> The claw 16 of the invention has a plurality of convex portions on the surface of the pressing portion B.
Since C ₁ to _{C 3} are formed, the grain culms that come into contact with the surface of the pressing part are effectively prevented from coming off from the claws due to sideways slipping during the operation of lifting or transporting the grain culms by the claws 16. It can be prevented. _{Furthermore ,} as _shown in FIG _.
At position C ₂ or C ₃ , cut line as shown in figure B.
If the tips are cut off at E ₂ and E ₃ , L ₂ and L ₃
The advantage is that you can get long nails.

As a result, for example, each claw 16a to 1 shown in FIG.
6c, pull up the longest length L ₁ of the claws 16 and
6a, and use the intermediate length L ₂ claw as the tip conveying claw 16c. Similarly, if you prepare a length L ₁ claw as a replacement stock for the shortest length L ₃ , you can use this to the fixed size. It has the advantage that it can be cut and used widely for other nails.

In the above embodiment, a protrusion is formed on the surface of the nail as a mark for the cutting part, but a groove is formed instead of the protrusion, and the nail can be cut to a predetermined size from this groove (recess). Even with this configuration, the same effects as in the above embodiment can be obtained.

In addition, by providing ribs D ₂ and D ₃ inside the nail, the strength of the nail itself is increased, and as a result, _the overall wall pressure can be reduced, resulting in weight and cost reduction.
By leaving D ₃ and cutting along the side of the nail tip, the tip of the nail after cutting will not become an open end, which may cause damage to the grain culm or shedding, or the nail may get caught in the grain culm. This has the advantage that problems such as damage caused by unnecessary loads can be prevented.

[Brief explanation of the drawing]

Figures 1A and B are both front views showing the main parts of the embodiment of the claw of the present invention, Figure 2 is a partial front view of a combine harvester showing the position where the claw of the present invention is attached, and Figures 3A and B are It is a front view showing a conventional example of a claw. 16, 16a to 16c...Claw, 20...Mounting part, A...Side wall part, B...Pushing part, _C1 to _C3 ...
Uneven parts, D ₂ , D ₃ ... ribs.

Claims (1)

[Scope of utility model registration request] The base end is a mounting part 20 that is attached to the chain 19 so as to be freely raised and swiveled, the upper surface of the front side is a pressing part B that contacts the culm when the culm is raised, and the claw 16 has a U-shaped hollow cross section with an open back side.
In the above, a convex portion or a concave portion _C2 , _C3 is formed at a suitable position on the base end side away from the tip of the pressing portion B of the claw 16, which engages with the culm when the culm is raised to prevent it from sliding sideways, and the convex portion or the concave portion C2, C3 in the hollow cross section of the claw ₁₆
At the position corresponding to _C3 , a harvester claw is formed with ribs _D2 , _D3 which partition the hollow cross section of the claw 16 and form a tip surface of the claw ₁₆ which slopes downward toward the tip when the claw 16 is cut along the convex or concave portions C2, _C3 while leaving the convex or concave portions _C2 , _C3 .