JPH0137084B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a reciprocating type stem culm cutting device used in various reaping machines such as combines and binders.

(b) Conventional technology In general cutting tools such as scissors and cutters, as well as stem culm cutting tools for agricultural machinery, the blade portion of the cutting blade is made of ceramic, which has excellent wear resistance and is free from rust. It is known that
56-104450 and Utility Model Application Publication No. 51-151194).

(c) Problems to be solved by the invention In the conventional technology, the blade part is formed of ceramics and can be expected to maintain its sharpness over a long period of time. In both cases, the ceramic blade part is formed in an integral continuous manner along the entire longitudinal direction of the member, and also in the latter case, it is formed in an integral continuous continuous manner around the entire circumference of the disc-shaped base member. There is a problem in that when a part is damaged, partial repair of the damaged part is not effective.

Therefore, the conventional method can be used only when there is no risk of obstacles colliding with the ceramic blade during cutting (when the cutting tool is a general cutting tool such as scissors, or when the cutting tool is a stem culm cutting tool). When cutting stem culms after obstacles have been sorted out), a reciprocating stem culm cutting device in a reaping machine can be applied without much worry about repairing the defective blade. When applied to cutting devices such as those in which the blade inevitably comes into contact with soil, gravel, or other obstacles during cutting, the inability to repair the damaged portion of the ceramic blade becomes a fatal flaw. It was hot.

The present invention makes the blade of a repro-type stem culm cutting device in which the involvement of obstacles is unavoidable during cutting operation, made of ceramics. The sharpness of the cutting device is further improved, and the brittleness of ceramics works effectively against large loads that exceed the allowable value, which prevents major damage to the cutting device. It is an object of the present invention to provide a stem culm cutting device that allows partial repair to be performed relatively easily.

(d) Means for Solving the Problems In order to achieve the above object, the reciprocating type stem culm cutting device of the present invention has individual blade receiving bodies installed in parallel on a metal receiving blade base 6. 8 is made of ceramics, and each receiving blade body 8 is attached so that most of the parts other than the cutting action part are superimposed and supported by the receiving blade holder 6 and can be individually attached to and detached from the receiving blade holder 6, It is characterized in that a cutting blade body 1 made of a metal material is brought into sliding contact with the upper surface of 8 groups of receiving blade bodies made of ceramics.

(E) Function In the reciprocating type stem culm cutting device of the present invention, a very small portion of the entire ceramic blade receiving body 8,
In other words, only the cutting action part on the periphery of the blade body and the part close to it protrudes outward from the metal blade holder 6.
Most of the blade rest is superimposed and supported by the metal blade rest 6 and is protected by the metal blade rest, so that even if it is subjected to a relatively strong load, it will not protrude outward from the blade rest 6. Since the cutting action portion is only chipped in the shape of a sharp edge, even slight damage to the blade receiver will not cause a decrease in cutting quality, improving durability.

During the operation of the cutting device, the metal cutting blade 1 sliding on the upper surface of the ceramic blade receiver 8 group,
Since the ceramics are polished by the grindstone action, the sharpness of the cutting device as a whole is maintained well over a long period of time, and furthermore, there is no need to place a large load on the cutting device. However, in this case, the individual brittleness of the ceramic blade receivers installed in the blade stand 6 so that they can be attached and detached individually becomes effective, and they receive a large load and are partially damaged, resulting in damage to the blade receiver and the drive. This prevents damage to the other end of the cutting device, such as the mechanism, and in the case of a ceramic blade receiving body that is damaged due to heavy loads, it is relatively easy to repair only the damaged part. It can be done.

(f) Examples Examples will be described with reference to the drawings.

Figures 1 to 4 show the first embodiment, Figures 5 to 6 show the second embodiment, and Figures 7 to 21 show the second embodiment.
The figure shows various other modifications.

FIGS. 1, 2, and 5 show the structure of a reciprocating stem culm cutting device, and numerals 1 in the figures represent individual cutting blade bodies made of metal.

Further, 2 is a knife bar for fixing the individual cutting blade bodies 1 in parallel, 3 is a knife head for reciprocating the cutting blade, 4 is a guide body, 5 is a knife holder, and 6 is a receiving blade stand on the receiving blade side. , 7 are fasteners for attaching and fixing the guide body and the knife holder to the blade receiving base 6.

Therefore, the blade mount 6 of the first embodiment has a blade mounting portion 6 that protrudes forward from the front edge of the horizontally long main body.
a... are arranged at a predetermined pitch in the longitudinal direction of the main body, and a ceramic blade receiving body 8 is placed on the top surface of each mounting portion 6a and removably attached by riveting. The body 8 is mounted in such a manner that only the cutting action portion formed at its peripheral edge and a portion close to it protrude outward from the peripheral edge of the blade attachment portion 6a, and most of the other portion overlaps with the blade attachment portion 6a. It will be done.

In this embodiment, in order to reduce the ceramic material required for each blade support 6 and to simplify the shape, a separate metal member is attached adjacent to the rear end surface of the blade support.

Therefore, in the assembled state, the knife bar 2 on the cutting blade side fits into the guide groove formed by the separate member 10 and the guide body 4, and the front lower surface of the cutting blade body 1... is connected to the upper surface of the ceramic blade receiving body 8... The rear part rests on the guide body 4, is pressed and held from above by the knife holder 5, and is reciprocated by the operation of the drive mechanism that engages with the knife head 3, so that the cutting blade body 1...
Stem culm cutting will be performed between the cutter and the cutting portion of the receiving blade body 8.

Further, in the second embodiment, the positional relationship between the cutting action part of the blade receiving body 8 and the peripheral edge of the blade mounting part 6a of the blade receiving base 6 is the same as in the first embodiment, and each blade receiving body 8 and The overlapping area with the blade receiving stand 6 is further increased, and attachment and detachment of each blade receiving body 8 is made much easier than in the first embodiment.

That is, the cutting blade bodies 1 are attached and supported by the knife bar 2 disposed on the upper surface thereof, and the knife bar 2 is attached to the holding guide portion 5a formed on the knife holder 5.
The blade receivers 8 corresponding to the cutting blades 1 are arranged and drilled from the blade attachment part 6a of the receiver holder 6 to the main body part. By fitting the protrusions 14 into the holes 13, the protrusions 14 are fitted into the holes 13 to be mounted on the blade rest 6, and are held in common with the cutting blade by pressing from above with the knife holder 5. It is structured like this.

Therefore, this embodiment operates in the same manner as the first embodiment, but each blade receiving body 8 can be replaced very easily.

Further, in the various modifications shown in FIG. 7 and subsequent figures, only the mounting structure of the blade receiving body 8 is illustrated, but the structure and structure of the cutting device as a whole may be different from those of the first embodiment, the second embodiment, or other embodiments. It is made in the same way as the known device, and the relative positional relationship between the cutting action part of the blade receiver 8 and the periphery of the blade attachment part 6a of the blade receiver holder 6 is the same as that of the first embodiment and the second embodiment. This is done in the same way as in .

In the example shown in FIGS. 7 and 8, a back-up member made of metal or synthetic resin material 15 is interposed between the blade support 6 and the blade support 8 to ensure durability of the blade support 8. Impact resistance is further improved.

The examples shown in FIGS. 9 and 10 are similar to the examples shown in FIGS. 7 and 8 in that the back-up member 15 is interposed between the blade support 6 and the blade support 8, but they are 16 to secure the blade receiving body 8.
This makes it easier to replace.

Furthermore, the examples shown in FIGS. 11 and 12 are examples in which the ceramic portion of the blade receiving body 8 is minimized, and in this case, the base 17 of the blade receiving body 8 is made of a metal material, and the cutting action portion is made of a metal material. The ceramic portion forming the blade is attached to the base 17 by means of a fastening means, such as fitting or adhesion, which allows replacement of individual blade receivers.

The three examples shown in Figs. 13 to 15, Figs. 16 to 18, and Figs. are provided in various cross-sectional shapes, and the blade body 8 is attached to the blade stand 6 by only fitting the concavo-convex portions or by using adhesive to fit the concave-convex portions, and each The blade receiving body 8 is designed to be replaceable.

In addition, when the concavo-convex fitting portion is a tapered fitting as shown in FIGS. 19 to 21, a clearance 18 is provided at the bottom of the fitting.

(G) Effects of the Invention As explained above, in the present invention, the receiving blade holder 6 of the reciprocating type stem culm cutting device is formed of a metal material, and the receiving blades arranged in parallel on the receiving blade holder 6 are The body 8 is made of ceramics, and most of each blade body 8 except the cutting action part is superimposed and supported by the blade pedestal 6, and can be individually attached to and detached from the blade pedestal 6. Since the stem culm cutting device has the cutting blade body 1 made of a metal material slidably attached to the upper surface of the group of 8 receiving blade bodies made of ceramics, the effects described below are achieved.

Only a small part of the blade body 8, that is, only the cutting action part of the periphery of each blade body and the part close to it, protrudes outward from the metal blade holder 6, and most of the blade body is made of metal. Since the blade is polymerized and supported by the metal blade holder, the resistance of the blade as a whole to obstacles is improved, and even if a strong impact load is applied, the cutting action part outside the protection range will be protected. Since the cutting function is not impaired and the cutting function can be continued by simply being chipped in the shape of a sharp edge, it is durable even though it is a stem culm cutting device in which the blade receiving body is made of ceramics.

In addition, during cutting, the metal cutting blade that slides on the top surface of the ceramic blade receiver is polished by the ceramic grindstone, so the sharpness of the entire stem culm cutting device is maintained. As a result, cutting operations with good sharpness can be performed over a long period of time.

In addition, even if you encounter an obstacle and receive a large impact load that does not stop the cutting action part of the blade receiving body from chipping, in that case, it is possible to attach and detach the blade individually to the blade holder. The brittleness of the individual ceramic blades installed in the blade can effectively absorb large impact loads and cause partial breakage, causing damage to other components of the cutting device, such as the cutting blade and drive mechanism. Because there is no such thing, only minor accidents occur, and the damaged blade receiving body can be put back into use by simply replacing and repairing the part.

[Brief explanation of drawings]

FIG. 1 is a plan view of a portion of the device according to the first embodiment of the present invention, FIG. 2 is an enlarged sectional view thereof, FIG. 3 is a partial plan view showing the mounting structure of the blade receiving body, and FIG.
5 is a cross-sectional view showing the configuration of the device of the second embodiment, FIG. 6 is a sectional view taken along B-B in FIG. 5, and FIG. 7 is a modification of the blade mounting structure. A partial plan view showing an example, FIG. 8 is a sectional view taken along the line CC in FIG. 7, and FIG.
The figure is a partial plan view showing another modification of the blade mounting structure, FIG. 10 is a sectional view taken along line DD in FIG. 9, and FIG. 11 is a partial plan view showing a modification of the blade mounting structure. Figure 12 is a sectional view taken along line E-E in Figure 11.
Fig. 13 is a partial plan view of a modified example in which the blade receiving body is attached by a concave-convex fitting portion, Fig. 14 is a sectional view taken along J-J in Fig. 13, and Fig. 15 is a cross-sectional view of Fig. 13. FF sectional view, FIG. 16 is a partial plan view showing a further modified example of the configuration in FIG. 13, and FIG.
Figure 18 is a sectional view taken along line K-K in the figure, and Figure 18 is taken along line G-G in Figure 16.
19 is a partial plan view showing a further modified example of the one in FIG. 13, and FIG. 20 is L in FIG. 19.
-L sectional view, and FIG. 21 is a HH sectional view of FIG. 19. 1...Cutter blade body, 6...Blade receiver stand, 8...Blade receiver body.

Claims (1)

[Claims] 1. In a reciprocating type stem culm cutting device disposed near the ground, the individual blade bodies 8 installed in parallel on the metal blade base 6 are formed of ceramics, and each blade body 8 is Most of the parts other than the cutting action part on the edge are superimposed and supported by the blade holder 6, and are attached to the blade holder 6 so that they can be attached to and removed from the blade holder 6 individually. A stem culm cutting device characterized in that a cutting blade body 1 made of a metal material is brought into sliding contact.