JP2010178720A - Puddling work machine and mudguard used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make mudguards mounted in front of a puddling work machine to have the function for pulling floated products, such as straws, floating on the muddy water of a field, on the inside of a shield cover. <P>SOLUTION: The puddling work machine 10 mounted on the rear portion of a tractor 20 and having a tilling rotor 6 which receives a power from the tractor 20 and is rotated on a horizontal axis and a shield cover 2 for covering the upper side of the tilling rotor 6 is characterized by connecting mudguards 1 to the travel direction front side of the shield cover 2. The mudguards 1 have a plurality of receiving pieces 1e divided in the longitudinal direction, and the surfaces of the receiving pieces 1e are connected to the travel direction front side of the shield cover 2 in a state inclined from the front side to the rear side from both the lateral sides of the work machine 10 to the central side. Thereby, muddy water existing in front of the mudguards 1 can be guided from spaces 1d between the adjacent receiving pieces 1e, 1e to the back sides of the mudguards 1 when the muddy water is pushed with the inclined surfaces of the receiving pieces 1e. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention is a scraper working machine equipped with a tilling rotor that is attached to the rear part of a tractor and cultivates a farm field, and in particular, for the purpose of preventing scattering of mud and the like to be splattered by tilling claws protruding from the tilling rotor. The present invention relates to a scraping work machine in which a mudguard material is attached to the front side of a shield cover, and a mudguard material used therefor.

  When the tilling rotor of the substitute scraper rotates down-cut, the muddy water scraped when the tilling claw comes out of the muddy water surface is scattered toward the shield cover by centrifugal force. This muddy water flows toward the front side along the inner peripheral surface of the shield cover. However, since the muddy water drops from the front end portion of the shield cover, it hardly scatters to the tractor.

  However, when the tilling nail bites into the muddy water, the surface of the water is struck violently, so that the muddy water is scattered all over, and the scattered muddy water may reach the tractor located in front of the scraper. In such a case, a splash prevention cover may be connected in front of the shield cover for the purpose of preventing muddy water from scattering (see Patent Document 1).

  When the anti-scattering cover is connected in a state of being suspended in front of the shield cover as in Patent Document 1, the anti-scattering cover faces the direction along the direction of rotation of the tilling rotor. It is considered that the mud and mud scattered can be blocked to some extent.

  However, since the anti-scatter cover is connected to the shield cover and suspended, the anti-scatter cover may be caught on the tillage rotor side during scraping work, or it may be turned up to the front side due to the scattered mud, The scattering prevention cover cannot be expected to have a stable scattering prevention effect. In this respect, it is considered to be advantageous to fix the scattering prevention cover to the shield cover in a state in which the scattering prevention cover is inclined from the upper side to the lower side in the advancing direction (see Patent Document 2).

  On the other hand, the plowing machines run on the field mainly for the purpose of cultivating the field where mud is stored on the mud in the previous stage of rice planting. Since these floating substances are often caught in seedlings at the time of planting, it is desirable to remove them from the field. From the viewpoint of removing this floating substance, a front rake body is also attached to the work machine to draw the floating substance such as firewood to the center side in the work machine width direction in order to plow the floating substance into the cultivated soil. Reference 3).

Japanese Patent Laid-Open No. 2001-16904 (Claim 1, Claim 2, Paragraphs 0011, 0017 to 0019, FIGS. 1 to 4) Japanese Utility Model Publication No. 49-43406 (Specification, page 3, line 5 to line 17, drawing) Japanese Patent Laying-Open No. 2005-13008 (claim 8, paragraphs 0021, 0022, 0026, FIG. 8)

  In Patent Document 2, as described above, the scattering prevention cover is fixed to the shield cover while being tilted backward from the top to the bottom, but the scattering prevention cover itself prevents the muddy water from scattering while performing the scraping work. It does not have the function of guiding the floating material in front of it to the center side in the work machine width direction. On the other hand, when the tip of the anti-scattering cover is immersed in muddy water, the suspended matter may be diffused outside the tilling rotor.

  In Patent Document 3, the front rake body connected to the front side of the work machine allows forcibly floating floating material such as firewood existing in front of the work machine into the mud of the field. Since it does not have the function of preventing the scattering of mud and mud from the inside, it is not used as the above-mentioned scattering prevention cover.

  In view of the above background, the present invention proposes a scraper working machine in which a mudguard material having a function of guiding suspended matter to the tilling rotor side is mounted in front of the shield cover, and a mudguard material used therefor.

According to a first aspect of the present invention, there is provided a scraper working machine including a tilling rotor that is attached to a rear portion of a tractor and that rotates around a horizontal axis by receiving power from the tractor and a shield cover that covers the top thereof. ,
In a state in which the mudguard material having a plurality of receiving pieces divided in the longitudinal direction is inclined on the surface of the receiving piece from the front side to the rear side from the both sides in the width direction of the scraping work machine to the center side. It is a constituent requirement that the shield cover is connected to the front side in the traveling direction.

  Since the front rake body is arranged in front of the work machine (including the skimming work machine) as described above, the floating substance can be guided to the work machine side, so that the floating substance is guided to the shield cover. In order to achieve this, it is appropriate to dispose a member that can correspond to the front rake body in front of a scraping work machine (hereinafter referred to as a work machine in this item). Therefore, a mudguard material is connected to the front side of the shield cover in the traveling direction, and this mudguard material has a function of attracting mud water to guide the mud water present on the front side of the working machine in the traveling direction. It becomes possible.

  Since the mudguard is connected to the front side of the shield cover, the mud and mud that the tilling rotor scoops up is received on the back and dropped, and the tractor is prevented from scattering to the tractor side. From the viewpoint of protecting from muddy water and mud, it is basically formed in a plate shape with length and width in the width direction and height direction of the work equipment. Moreover, from the meaning of dropping muddy water and mud received on the back side to the front side without scattering to the front side, the thickness is such that it is not easily bent and deformed to the front side by pressure due to muddy water or the like.

  On the other hand, since the mudguard material is connected to the shield cover of the work machine, the lower end part may be immersed in the mud water, so that the mudguard material may receive excessive resistance from the rice stocks and soil blocks during work. It is desirable to have elasticity that can be appropriately bent and deformed by resistance from the rice stock and soil mass received by the lower end. From the above, the mudguard is made of a material having moderate elasticity such as a synthetic resin such as polypropylene, polyethylene, polyvinyl chloride, vinyl acetate, or a rubber (synthetic rubber), or a metal material such as a steel plate or stainless steel. Produced.

  The longitudinal direction of the mudguard member is divided into a plurality of receiving pieces, and the shield cover advances in a state where the surface of the receiving piece is inclined from the front to the rear from both sides in the width direction of the scraping work machine to the center side. By connecting to the front side in the direction, when mud water existing in front of the mudguard is pushed by the inclined surface of the piece, it works to guide it from the gap between adjacent receiving pieces to the back side of the mudguard .

  Here, for example, when the entire scattering prevention cover is divided into a plurality of cover elements in the length direction (the width direction of the working machine) as in Patent Document 1 described above (Claim 2 of Patent Document 1), When the adjacent cover elements are merely separated by a cut, and the length direction of the cover elements is not inclined toward the front side in the traveling direction, and is oriented in the orthogonal direction on the elevation surface, The muddy water pushed on the front surface of the cover element (mudguard) cannot be guided in any direction in the width direction of the work machine.

On the other hand, in the present invention, the mudguard material having a plurality of receiving pieces divided in the longitudinal direction is inclined on the surface of the receiving piece from the front side to the rear side from the both sides in the width direction of the scraping work machine to the center side. When connected to the front side of the shield cover in the advancing direction, the mudguard material is removed from the gap between adjacent receiving pieces when the mud water existing in front of the mudguard material is pushed by the inclined surface of the piece. It is possible to guide to the back side.
The inclination of the surface of the receiving piece from the front side to the rear side from both sides in the width direction of the scraping work machine to the rear side means that the receiving piece itself has the inclination regardless of the connection state with the shield cover. There are two cases: a case where it is formed depending on a connection state with a shield cover.
The inclination of the receiving piece is given by a straight line, a curve, or a combination of a straight line and a curve.

The surface of the mudguard material is provided with a plurality of slopes from the front side to the rear side from the width direction side to the center part side of the scraper, so that the mud water existing in front of the mudguard material is spaced between adjacent receiving pieces. Will be guided to the back side of the mudguard. At this time, the surface of the mudguard material (receiving piece) is inclined from both sides in the width direction of the work machine to the center side, so that the mud pushed on the surface of the mudguard material (receiving piece) is the width of the work machine. Since it moves at a speed from the side of the direction toward the center, it is always sent toward the center of the work machine. The muddy water feeding effect due to the inclination of the receiving piece is considered to be related to the inclination angle of the receiving piece, the traveling speed of the work implement, the water depth and other conditions. The number of receiving pieces and the inclination angle are appropriately set.
As a result, floating materials such as dredging floating on the muddy water existing in front of the work equipment are naturally guided to the work equipment side (retained on the spot, or do not flow outside the work width (work machine width)). Is realized).

  When the floating material is guided to the work machine side and taken into the shield cover, the floating material is caught in the tilling rotor and embedded (mud) in the mud. Since the suspended matter is embedded in the mud, the entrapment in the seedling due to the floating matter floating at the time of rice planting is eliminated, and the influence of the suspended matter on the seedling and the planting operation are avoided.

The mudguard material alone is attached to the rear part of the tractor, and is connected to the shield cover of the scraper working machine including the tilling rotor that rotates around the horizontal axis by receiving the power from the tractor and the shield cover that covers the top,
It has a plurality of receiving pieces divided in the longitudinal direction, and is connected to the shield cover in a state in which the surface of the receiving piece is inclined from the front to the rear from one side to the other side in the length direction. (Claim 5).

  Here, “one side in the length direction” corresponds to “both sides in the width direction of the cutting work machine” in claim 1, and “the other side in the length direction” in “width direction center part side of the cutting work machine” in claim 1. ". “One side in the length direction” and “the other side” mean that the mudguard material may be used with the front side and the back side reversed. If a set of two sheets (symmetrical) of mudguards (the collection state of the receiving pieces) is arranged symmetrically with respect to the center in the width direction of the scraping work machine, the center of the cutting work machine from both sides in the width direction This is because an inclination from the front to the rear is applied toward the part side ”(claim 1).

  There may be one mudguard material in the width direction of the work machine, and it may have a length that covers the entire width (full length) of the shield cover, or multiple sheets, continuous or intermittently arranged, so that the total width of the shield cover In some cases. In the case where the mudguards are arranged intermittently, the mudguards adjacent to each other are arranged at intervals such that mud water is not discharged from the gap between them to the surface side of the mudguard.

  When the mudguards are arranged over the entire width of the shield cover, there is no gap between adjacent mudguards, so that the effect of preventing muddy water and the like is prevented. However, in the portion directly behind the tractor having a three-point link or the like, muddy water is blocked by these members, so there is little influence even if there is no mudguard.

  After all, it is preferable that the mudguard material for the purpose of preventing muddy water scattering on the tractor is disposed over the entire portion except the portion directly behind the tractor. In the state of connection to the shield cover, it is desirable that the slant of the receiving piece is formed in the entire width direction of the mudguard material, but if it is formed at least in the regions on both sides in the width direction, muddy water or suspended matter is removed from the work implement. The effect of guiding to the center side is expected.

  The mudguard is connected to the shield cover in the height direction of the working machine, and in principle, has a height at which the lower end or the lowermost end contacts the muddy water surface or is immersed in the muddy water during work.

  In addition, in order to demonstrate the effect that the inclination of the receiving piece in the above state guides muddy water or the like to the central part side of the work machine, the end part of the receiving piece located on the central part side of the scraping work machine has been described above. What is necessary is just to be located in the advancing direction back side rather than the edge part located in the width direction both sides of the scraping work machine of the receiving piece adjacent to the receiving piece (Claim 2).

  The mudguard in the scuffing work machine according to claim 2 is a single piece, and an end portion of the receiving piece located on the other side of the receiving piece is an end portion of the receiving piece adjacent to the receiving piece located on one side in the length direction. It is a constituent requirement that it is located on the rear side in the direction of travel (claim 6). Here, “the length direction” means “the length direction” in claim 5, and “the length direction one side” and “the length direction other side” are “the width of the cutting work machine” in claim 1, respectively. Corresponding to both sides in the direction and the center side in the width direction of the scraping work machine, the single side of the mudguard material can be used by reversing the front side and back side of the length direction on one side and the other side It means that it may be.

Specifically, each receiving piece constituting the mudguard material is twisted to the rear side around the width direction (height direction) axis of the mudguard material, and the receiving piece is curved, Alternatively, it can be obtained by bending or by twisting the portion of each receiving piece closer to the center of the working machine toward the back side of the mudguard.
The amount of bending, the amount of bending, the amount of twisting, etc. are set as appropriate.

  On the other hand, each receiving piece is inclined by connecting each receiving piece to the attaching portion of the shield cover provided with an inclination in which the end on the center side of the work machine is located on the rear side in the traveling direction. Sometimes attached. The inclination is given by a straight line, a curved line, or a combination of a straight line and a curved line. In this case, as shown in FIG. 12- (c), the surface of the attachment portion (indicated by reference numeral 2b in the figure) of the front surface of the shield cover is inclined such that the center side is the rear side in the traveling direction from both sides of the work implement. It is obtained by being attached. In FIG. 12- (c), the right side is the center side of the mudguard.

  When the receiving piece has the form shown in FIG. 1- (c) or FIG. 12- (c), as shown in FIG. 2- (b), when the twisted portion at the lower end of the mudguard is immersed in the muddy water, Muddy water that exists in front of the mudguard and collides (pushed) with the surface of each receiving piece is closer to the center of the work machine as shown by the arrows in FIG. 1- (b) or FIG. 12- (b). It becomes easy to go around to the back side of the receiving piece located. As a result, it becomes easy to guide the mud existing in front of the mudguard material from the gap between the adjacent receiving pieces to the back side of the mudguard material, and it is possible to generate a water flow in the mud from the both sides of the work equipment toward the center side. It is.

  The mudguard is divided by a plurality of receiving pieces in the length direction, and the plurality of receiving pieces are gathered so that basically in the state of use, FIG. 1- (a), FIG. 8, FIG. 12- (a). As shown in the figure, it has a warm shape.

  When a plurality of mudguards are attached in the width direction of the shield cover, the mudguards are arranged on the shield cover with respect to the center in the width direction as shown in FIGS. 1- (a), 3, and 12- (a). It is mounted with line symmetry or plane symmetry. When one mudguard has a length over the entire width of the work implement, a plurality of receiving pieces are formed symmetrically with respect to the center in the length direction of the mudguard.

  As shown in FIG. 10, when the lower end of the mudguard is horizontal, the lower end of the mudguard does not act so as to actively generate a flow in the mud, but for example, FIG. 1- (a), FIG. As shown in (a), if the lower end of each receiving piece is inclined from the lower side to the upper side from both sides in the width direction of the work machine (Claim 3), the lower end portion of the mudguard is muddy water. It is possible to provide a function of moving the muddy water present in front of the mudguard from the both sides in the width direction of the work machine to the central part side in FIG.

  When the muddy water present in front of the mudguard is about to be pushed forward by the lower end of each receiving piece, the muddy water is immersed in the muddy water because of the resistance that the muddy water receives from the muddy water of the receiving piece. Because the resistance received by the muddy water is small, the muddy water tends to go to the side where the resistance from the receiving piece is small. As a result, the muddy water present in front of the mudguard material generates a water flow that moves from both sides in the width direction of the work machine with high resistance to the central part with low resistance as indicated by arrows at the lower end of each receiving piece. It is promoted that an object is guided to the work machine center side and is embedded in the mud by the tilling rotor. Although not shown, when the entire lower end of the receiving piece is immersed in the muddy water, a water flow similar to the above is generated, and the floating material is guided to the center of the work machine and embedded in the mud by the tilling rotor. Will be promoted.

  Trying to go to the side where the resistance from the receiving piece is small is also applicable to the suspended matter blocked by the mudguard material, so that the suspended matter is guided to the center in the width direction of the work machine by riding on the water flow generated in the muddy water. In addition to this, it is also guided directly to the center side in the work machine width direction.

  Further, as shown in FIGS. 11- (b) and (c), the bottom surface (downward surface) of the mudguard material (receiving piece) with the slope shown in FIG. 11- (a) is the surface from the back side of the mudguard material. If an inclination is applied from the lower side to the upper side toward the side, the effect of inducing muddy water that collides with the lower end surface of the mudguard material to the center side of the work implement in the range of the thickness of the mudguard material is enhanced. In FIG. 11- (c), the right side is the front side of the mudguard.

  In this case, when muddy water present in front of the mudguard shown in FIG. 11- (b) is about to be pushed forward from the lower end of the mudguard, the lower end surface of each receiving piece is indicated by an arrow. Thus, since the water flow which moves to the center part side with small resistance from the width direction both sides of a working machine with large resistance is generated, the guidance effect to the work machine width direction center part side with respect to muddy water and suspended solids increases.

  In addition, in the case of FIGS. 11- (a) and (b), the lower end of each receiving piece is inclined so that the end of the lower end near the both sides in the width direction is at the lowest level. Become. When the lower end is immersed in the muddy water surface (the level shown in FIG. 8 (b)), a gap is formed between the lower end near the center in the width direction of the work implement and the water surface due to the inclination of the lower end. For this reason, suspended matter is easily taken into the shield cover from the gap due to the water flow generated by the lower end.

The mudguard material in the scraping work machine according to claim 3 is a single unit, and the lower end portion of each receiving piece is inclined from the lower side to the upper side from the one side in the length direction to the other side. Is a constituent requirement (claim 7). Here, “the length direction” also means “the length direction” in claim 5, and “the length direction one side” and “the length direction other side” are respectively “the width of the chamfering work machine” in claim 1. Corresponding to the “direction both sides” and “the central side in the width direction of the skimming machine”.
In addition, when twist etc. are added to the receiving piece itself, it cannot be used by reversing the front side and the back side of the receiving piece. Moreover, in the receiving piece attached diagonally to the shield cover, the receiving piece can be used by inverting the front side and the back side.

  Since the mudguard can be worn or damaged by continuous use, it is in principle detachably connected to the shield cover. The mudguard material has a connection portion 1a connected to the front surface portion (the hanging portion 2b in the embodiment) located on the upper side (near the upper end portion in the width direction) on the front side in the traveling direction of the shield cover. It is mounted on the work machine while maintaining a state where it can behave independently (see, for example, FIG. 1- (a), FIG. 3, FIG. 8, FIG. 12- (a)). In this case, it does not matter whether it is detachable. The mudguard material (receiving piece) having the connection portion 1a above becomes a part of the shield cover by being connected to the front surface portion of the shield cover at the connection portion 1a.

  When the mudguard material is viewed in a longitudinal section, the shield cover in a state where the mudguard material is inclined from the front side to the rear side in the traveling direction of the work machine from the upper side (connecting portion) to the lower side (receiving piece) as shown in FIG. (Claim 4) is present in front of the mudguard material, so that suspended matter and mud water that collide with the front surface of the mudguard material are guided to the lower side of the mudguard material along the inclined front surface. The effect of taking in floating matter and the like into the shield cover is exhibited.

  In this case, since the back surface of the mudguard material is inclined from the front side in the traveling direction to the rear side, the mud water flowing down the back surface of the mudguard material can be easily taken into the lower part of the back surface of the mudguard material. The inclination from the connecting portion to the receiving piece is usually formed by connecting the shield body to the shield cover in an inclined state. However, as long as it does not hinder the effect of water flow generation on the muddy water, FIG. As shown, the mudguard material itself may be curved or bent around the longitudinal axis of the mudguard material from the front side to the back side.

  When the surface of the mudguard is tilted and connected to the shield cover, mudwater that collides with the front surface of the mudguard (receiving piece) can flow downward. This does not hinder the generation of water flow to the center of the work machine. In particular, when the lower end portion of the receiving piece is inclined upward from both sides of the work machine to the central portion (Claim 3), when the mudguard material itself is inclined, it collides with the front surface of the receiving piece. Thus, the muddy water flowing downward can be taken under the lower end surface. As a result, the muddy water flowing downward from the front surface of the receiving piece can be placed on the muddy water flowing from the lower end surface of the piece toward the center of the work machine. The effect of taking in is easily demonstrated.

  A shield cover with a mudguard material having a plurality of receiving pieces divided in the longitudinal direction, with the surface of the receiving piece being inclined from the front side to the rear side from both sides in the width direction of the scraping work machine to the center side Because it is connected to the front side in the traveling direction of the mud, it can be guided to the back side of the mudguard material from the gap between adjacent receiving pieces when mud water existing in front of the mudguard material is pushed by the inclined surface of the piece. it can.

  As a result, suspended matter such as dredging floating on the muddy water existing in front of the mudguard material is naturally guided to the work machine side and taken into the shield cover, so that the suspended matter is caught in the tillage rotor, It will be embedded in.

Also, by dividing the longitudinal direction of the mudguard material into a plurality of receiving pieces, the inclination of the surface of the receiving piece is inclined to the surface of the receiving piece by inclining the receiving piece itself regardless of the connection state with the shield cover. Since the surface of the receiving piece may be inclined depending on the connection state with the shield cover, the degree of freedom in designing the mudguard material is increased. Further, when the surface of the receiving piece is inclined according to the connection state with the shield cover, it is not necessary to twist the receiving piece itself, so that the manufacturing cost can be reduced.
Furthermore, when the surface of the receiving piece is inclined by the connection with the shield cover, the mudguard material alone (receiving piece) can be used by inverting the front side and the back side. Therefore, the manufacturing cost can be reduced.

(A) is a scraper in which two sets of mudguards having four independent receiving pieces inclined from the front to the rear from both sides to the center side are connected at positions near both sides in the width direction in front of the shield cover. The front view of the tractor side showing the work machine, (b) is an arrow view of the y-y line in (a), and (c) is an example of a receiving piece in which the central side is twisted from the front to the rear. It is the shown perspective view. (A), (b) is an arrow XX view of FIG. 1, (a) shows the state of a normal water level, (b) shows the state where the water level is rising from (a). . It is the front view by the side of the tractor which showed a mode that the mudguard material was connected to the shield cover front, when an extension work machine was connected with the work machine body. It is the side view which showed a mode that the extension working machine in the alternative working machine shown in FIG. 3 was folded and stored. FIG. 5 is an enlarged cross-sectional view of the shield cover of FIGS. 2 and 4. It is the top view which showed the mode at the time of the operation | work by the alternative scraping work machine shown in FIG. It is the perspective view which showed a mode that the plowing work machine shown in FIG. 3 is working in the farm field with muddy water. (A), (b) is the elevation which showed the flow of the muddy water in the inclined slit of the mudguard in the state shown in FIG. 7, and respond | corresponds to FIG. 2- (a), (b), respectively. (A), (b) is a connection example other than FIG. 5 to the shield cover of a mudguard, (a) is a longitudinal cross-sectional view when the mudguard is bent, (b) is curved. . It is an elevation view of a mudguard with a horizontal lower end. (A) is an elevation view showing a production example of a mudguard material when the lower end portion of the receiving piece is inclined, and (b) is an illustration of the mudguard material on the lower end surface of the receiving piece with the inclination shown in (a). The elevation which showed the mudguard material at the time of attaching the inclination which goes upwards from the back to the surface side from the back side, (c) is xx sectional view taken on the line of (b). (A) is two sets of mudguards having four independent receiving pieces at positions near both sides in the width direction in front of the shield cover having attachment parts inclined from front to rear from both sides to the center side. The front view of the tractor side which showed the scraping work machine which connected A, (b) is an arrow view of the y-y line of (a), (c) is inclined from the front to the back from both sides to the center part side. It is the perspective view which showed the mudguard material attached to the attached attachment part.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  1- (a) includes a tilling rotor 6 that is mounted on the rear portion of the tractor 20 shown in FIG. 6 and that rotates around a horizontal axis by receiving power from the tractor 20 and a shield cover 2 that covers the top thereof. 2, the mudguard 1 having a plurality of receiving pieces 1e divided in the longitudinal direction on the front side in the traveling direction is formed on the surface of the receiving piece 1e from the both sides in the width direction of the scraping work machine (hereinafter, working machine) 10 to the center. It is the working machine 10 connected in the state where the inclination which goes to the back from the front toward the side was given. Details of the mudguard 1 will be described later.

  As shown in FIGS. 1 and 2, the main body 10A of the work machine 10 includes a top mast 11 connected to a three-point link hitch mechanism including a top link and a lower link at the rear of the tractor 20, and a lower link connecting portion 12. It is attached to the rear part of the tractor 20 via a three-point link hitch mechanism so as to be able to be raised and lowered. A gear box 13 connected to the PTO output shaft of the tractor 20 via a joint shaft having a universal joint, a transmission shaft, and the like is disposed at the lower end portion of the top mast 11, and is transmitted from the gear box 13 in the width direction of the main body 10A. A frame 14 and a support frame 15 are installed. The power from the PTO output shaft is transmitted to the PIC input shaft 13 a of the gear box 13, and the power received by the PIC input shaft 13 a is transmitted to the transmission shaft inserted through the transmission frame 14.

  A chain transmission case 16 is fixed to the distal end portion of the transmission frame 14 so as to hang down, and an end cover 17 facing the chain transmission case 16 is fixed to the distal end of the support frame 15. A rotary shaft 7 of the tilling rotor 6 is installed between the transmission case 14 and the end cover 17 so as to be rotatable about the axis. A chain is stretched between the chain transmission case 16 and the rotary shaft 7, and the power of the transmission shaft is transmitted to the rotary shaft 7 through the chain. The shield cover 2 is joined to the chain transmission case 16 and the end cover 17 at end plates 21 and 21 at both ends thereof.

  A tilling claw 8 protrudes from the outer periphery of the rotary shaft 7 at an appropriate interval in the circumferential direction, and the tilling rotor 6 is constituted by the rotary shaft 7 and the tilling claw 8. The tilling claws 8 are arranged in the axial direction of the rotary shaft 7 with an interval that does not interfere with each other. The tilling claws 8, 8 adjacent to each other in the axial direction of the rotary shaft 7 are arranged at an angle with respect to the center of the shaft, for example, and the tip of the tilling claws 8 in FIG. 2, FIG. 4 and FIG. Draw a rotation trajectory indicated by a two-dot chain line. Fig.2- (a) shows the situation of normal water level, and (b) shows the situation where the water level is higher than (a). 8- (a) and (b) show the front of the shield cover 2 corresponding to FIGS. 2- (a) and (b).

  Under the transmission frame 14 and the support frame 15, a shield cover 2 that covers the rotation range of the tillage claw 8 and protects the main body 10 </ b> A of the work machine 10 from earth and sand is disposed. As shown in FIG. 1, the shield cover 2 is joined to lower brackets 14 a and 15 a protruding below the transmission frame 14 and the support frame 15 in a connecting member 2 a protruding from the upper surface (outer peripheral surface) thereof. Is supported by both frames 14 and 15.

  The two-dot chain line just below the lower end of the rotary shaft 7 in FIG. 2- (a) and the two-dot chain line passing through the rotary shaft 7 in FIG. 2- (b) indicate the level of the mud surface of the field. It changes according to the change of the depth of the mud surface. 1, FIG. 8, and FIG. 12 show an example in which the lower end portion of each receiving piece 1e constituting the mudguard 1 is inclined upward from both sides of the work machine 10 to the center side. Under the normal water level situation shown in FIG. 2- (a), the level of the muddy water surface is not immersed in the muddy water as shown in FIG. 8- (a). Under the high water level situation shown in b), about half of the lower end of each receiving piece 1e is immersed in the muddy water as shown in FIG. 8- (b).

  In the situation of the water level shown in FIGS. 2A and 8A, the mudguard 1 is guided to the lower end of the mudguard 1 through the gap 1d after the mud pail 8 scrapes off, and then the work machine 10 It works to guide to the central part side. In the situation of the water level shown in FIGS. 2B and 8B, the mudguard 1 in addition to guiding the mud water scraped by the tilling claws 8 to the lower end through the gap 1d, the front of the mudguard 1 It receives the muddy water and suspended solids present at the lower end of the piece 1e and guides it toward the center of the work machine 10.

  As shown in FIG. 2- (a), the floating material easily enters the shield cover 2 under the condition that there is a gap between the lower end of the receiving piece 1e and the water surface, but the length direction of the mudguard 1 is the gap 1d. By being divided into a plurality of receiving pieces 1e with a gap, each receiving piece 1e is easily bent and deformed compared to the case where each receiving piece 1e is not divided (integrated formation) (the degree of freedom of deformation is large). Therefore, even under the situation shown in FIG. 2- (b), the effect of taking the floating substance into the shield cover 2 is maintained. Since the receiving piece 1e can be restored immediately even when it is elastically deformed due to resistance from a suspended matter or the like, it does not affect the effect of inducing muddy water.

  3 and 4 show a state in which the mudguard 1 is connected to the main body 10A and the extension work machine 30 when the extension work machine 30 is foldably connected to both sides in the width direction of the main body 10A. 3 shows a state in which the extension work machine 30 is deployed, and FIG. 4 shows a state in which the extension work machine 30 is stored.

  As shown in FIG. 4, the extension work machine 30 has a tilling rotor 34 that rotates simultaneously with the tilling rotor 6 when deployed, a shield cover 31 that covers the top, and end plates 32 that are positioned on both sides of the shield cover 31 in the width direction. The plate 32 is connected to the end plate 21 of the main body 10A in a state where the plate 32 can be unfolded and folded. For example, as shown in FIG. 4, the extension work machine 30 is connected to the main body 10 </ b> A so as to be rotatable around an axis inclined in the vertical direction with respect to the traveling direction. The tilling rotor 34 of the extension work machine 30 receives power from the tilling rotor 6 by being connected to the rotary shaft 7 of the tilling rotor 6 of the main body 10A via a clutch during deployment.

  The extension work machine 30 is connected by a pin 23 or the like to a bracket 22 protruding from the upper side of the end plate 21 in the main body 10A at a position closer to the rear side of the end plate 32 in the bracket 33 protruding from the upper side of the end plate 32. As a result, it is connected in a state where it can be expanded and retracted. The extended state and the retracted state of the extension work machine 30 are restrained by the restraining device 35 that holds the respective states. FIG. 6 shows the working state of the work machine 10 in the expanded state of the extension work machine 30.

  As shown in FIG. 6, a leveling plate 40 for leveling the mud surface of the farm is connected to the rear of the main body 10 </ b> A, but is connected to the leveling plate 40 of the main body 10 </ b> A in its unfolded state behind the extension work machine 30. The resulting leveling plate 41 is connected. In FIG. 6, an auxiliary leveling plate 42 is connected to the outside of the leveling plate 41 of the extension work machine 30 in the direction of the width of the work machine 10 to push muddy water and dredged material existing behind the work machine 10 toward the center in the width direction. is doing.

  The mudguard 1 having four independent receiving pieces 1e is a mounting plate that faces the front side in the traveling direction of the shield cover 2, specifically, the front side, as shown in FIGS. 1- (a), (b) and FIG. 3 is connected to the shield cover 2 while being inclined from the front to the rear from both sides in the width direction to the center side. The shield cover 2 has a cross-sectional shape surrounding the tilling rotor 6, a front part located near the front of the tilling rotor 6, an intermediate part located above the tilling rotor 6, and a rear located near the rear of the tilling rotor 6. Divided into parts.

  In the drawing, as shown in FIG. 5, which is an enlarged view of FIG. 2, a drooping portion 2b is formed at the front end position of the front portion, and a mounting plate 3 is detachably disposed with respect to the drooping portion 2b. Together with the material 1, the mudguard 1 can be cleaned and replaced by detachably connecting to the hanging portion 2 b by a fastener 4 such as a bolt or a pin. An insertion hole is formed in a portion through which the hanging portion 2b, the mounting plate 3, and the fastener 4 of the mudguard 1 pass. In FIG. 1- (c), FIG. 10, FIG. 11- (a), (b), the insertion hole of the mudguard 1 is indicated by 1b.

  Each receiving piece 1e (the mudguard 1) may be directly joined by the fastener 4 in contact with the surface of the mounting plate 3, but in the drawing, the binding force of each receiving piece 1e by the fastener 4 is From a flat bar or the like having a length equivalent to that of the mudguard 1 (the connecting portion thereof) between the fastening material 4 on the surface side of each receiving piece 1e so as to act equally in the length direction of the mudguard 1 The presser material 5 is interposed. The mudguard 1 (each receiving piece 1e, the same applies hereinafter) is also connected to the shield cover 31 of the extension work machine 30 via the mounting plate 3 or the fastener 4 via the mounting plate 3 and the pressing member 5. Is done. In this case, an insertion hole through which the fastener 4 is inserted is also formed in the pressing member 5.

  In the drawing, in particular, the mounting plate 3 is formed in an L-shaped cross-sectional shape, so that the mudguard 1 overlaps with the hanging portion 2b of the shield cover 2 and receives the supporting portion 3a in a state where the mudguard 1 overlaps with the supporting portion 3a. It is composed of two parts of the contact part 3b that is bent and the tip contacts (contacts) the surface of the front part of the shield cover 2, and when the mudguard 1 is connected to the shield cover 2, the mudguard 1 is placed on the vertical surface. The shield cover 2 is connected to the shield cover 2 at a fixed angle.

  FIG. 5 shows a state in which the working machine 10 is inclined from the front side to the rear side in the traveling direction from the upper side to the lower side so that the muddy water received by the surface (front surface) of the mudguard 1 can be guided downward. The state where the mudguard 1 is connected is shown. Since the back surface of the mudguard material 1 is inclined from the front side in the traveling direction to the rear side, it is easy to guide the mud water flowing down the back surface of the mudguard material 1 to the lower side of the mud material 1. Guiding the mud water received by the surface of the mudguard 1 is to bend the mudguard 1 itself from the front side to the back side as shown in FIG. 9- (a), or as shown in FIG. 9- (b). It is also possible to bend it.

  9- (a) and (b), the lower part in the height direction of the mudguard 2 is bent or curved from the surface side to the rear side, so that the mud received on the surface of the mudguard 1 is forward in the traveling direction. Without being pushed out, it is possible to guide to the rear side. When the lower part of the mudguard 1 is curved as shown in FIG. 9- (b), the speed of the mud water contacting the surface of the mudguard 1 is higher than that of the planar shape shown in FIG. 9- (a). Since it decreases as it goes backward, it is considered that the backward guiding effect is high. In the case of FIG. 9- (b), the effect of taking in floating matter existing in front of the mudguard 1 to the back side (inside the shield cover 2) of the mudguard 1 is also high.

  The mudguard 1 is shown in FIG. 1- (c), FIG. 8 (enlarged view near both sides in the width direction of the work machine 10 in FIG. 1- (a)), FIG. 10, FIG. 11- (a), (b), FIG. As shown in 12- (c), basically, a connecting portion 1a connected to the hanging portion 2b located on the front side of the shield cover 2, and a mud receiving portion 1c continuous to the connecting portion 1a and hanging downward. It is divided into height direction (width direction). The connecting portion 1a is formed with an insertion hole 1b through which the fastener 4 is inserted for connection to the hanging portion 2b of the shield cover 2.

  The mud receiving portion 1c is formed from a plurality of receiving pieces 1e arranged with a gap 1d. The gap 1d does not need to be linear, and may be formed in a curved shape. In order to exhibit the effect of guiding mud water or the like to the central portion side of the work machine 10 by having a plurality of gaps 1d, it is appropriate to be attached to one mudguard 1 and to be formed from a plurality of receiving pieces 1e. It is. Accordingly, the number of receiving pieces 1e is not limited.

  The mudguard 1 may be arranged over the entire length of the shield cover 2, but the mud water existing in front of the shield cover 2 is shielded while retaining the mud and mud scraped by the tiller rotor 6 inside the shield cover 2. 2, it is not always necessary to be disposed in the entire length, as long as it can be guided into the interior of the shield cover 2.

1- (a), (b), FIG. 11- (a), (b), FIG. 12- (a), (b) have “a plurality of receiving pieces 1e divided in the longitudinal direction. The mudguard 1 having the requirement that the surface of the piece 1e is connected to the shield cover 2 with an inclination from the front to the rear from both sides in the width direction of the work machine 10 to the center side. The form is shown. According to this, when the twisted portion at the lower end of the mudguard 1 is immersed in the mud, the mud that exists in front of the mudguard 1 and collides with (presses) the surface of each receiving piece 1e is shown in FIG. As shown by the arrows in (b), FIG. 11- (b), and FIG. 12- (b), it becomes easy to go around the back side of the receiving piece 1e located near the center of the work machine 10. As a result, it becomes easy to guide the muddy water present in front of the mudguard 1 from the gap 1d between the adjacent receiving pieces 1e, 1e to the back side of the mudguard 1, and the mud is directed from the both sides of the work machine 10 to the center side. A water stream can be generated.
In this case, the end of the receiving piece 1e located on the center side of the work implement 10 is more than the end of the receiving piece 1e adjacent to the receiving piece 1e described above on both sides in the width direction of the work implement 10. By being located on the rear side in the traveling direction, the inclination of the receiving piece 1e exerts an effect of guiding muddy water or the like to the center side of the work machine 10. 1, 11, and 12, the lower ends of the receiving pieces 1 e are not necessarily inclined with respect to the horizontal, and the lower ends of the receiving pieces 1 e are horizontal as shown in FIG. 10. Also good.

  The thickness of the mudguard 1 (receiving piece 1e) itself varies depending on the function (performance) required for the mudguard 1, and depends on the material (raw material) for exhibiting the bending rigidity corresponding to the function. For example, in the case of synthetic resin or rubber, the thickness is about 1.5 to 2.5 mm.

  FIG. 7 shows a state where the working machine 10 in which the mudguard 1 is connected to the hanging part 2b in front of the shield cover 2 is actually working in the field where mud is stored on the mud.

  1, 8, and 12 particularly have “a plurality of receiving pieces 1 e that are divided in the longitudinal direction, and the front surface of the receiving piece 1 e from both sides in the width direction of the work machine 10 toward the center side. In addition to the requirement that it is connected to the shield cover 2 with an inclination toward the rear, “below the lower end portion of each receiving piece 1e from both sides in the width direction of the work machine 10 toward the central portion side. The form of the mudguard material 1 with the requirement that it is inclined upward from the "slave" is shown. When the lower end portion of the receiving piece 1e is inclined as described above, the receiving piece is under a water level situation in which there is a gap between the lower end portion of the receiving piece 1e and the muddy water surface as shown in FIG. The floating matter such as rice stock that collided with the lower end of 1e tends to flow into the center of the work implement 10 having a large distance from the muddy water surface to the lower end of the receiving piece 1e. The effect of guiding to the center side is expected.

  In a situation where the level of the muddy water surface is at the level of the center in the width direction of the lower end of each receiving piece 1e as shown in FIG. 8- (b), the lower end of the receiving piece 1e is immersed in (contacts) the muddy water surface. Thus, since the muddy water is guided from the both sides in the width direction of the work machine 10 to the center side, an effect of generating a water flow directly with respect to the muddy water existing in front of the mudguard 1 is expected.

  When the working machine 10 in which the mudguard 1 is mounted on the shield covers 2 and 31 of the main body 10A and the extension work machine 30 in the state shown in FIG. 3 is actually operated at a speed of about 0.7 m to 1.4 m / sec. (FIG. 7), due to the effect of pushing away mud water by the mudguard material 1, the mud that exists in front of the mudguard material 1 flows toward the center in the width direction of the shield cover 2 and exists in front of the mudguard material 1. It is confirmed that the muddy water to be guided is guided to the width direction center portion side of the shield cover 2.

  As described above, the mudguard 1 is divided into the connecting portion 1a and the mud receiving portion 1c in the height direction, and is divided into a plurality of receiving pieces 1e with a gap 1d in the width direction (length direction). . FIG. 10 shows a mudguard 1 having a receiving piece 1e which is divided into a plurality of gaps 1d having an inclination from the upper side to the lower side and inclined from both sides in the width direction toward the center side, and whose lower end is horizontal. FIG. 8 shows an elevation when the mudguard 1 is viewed from the surface side (front side in the traveling direction), and the mudguard connected to the right side toward the front in the traveling direction of the shield cover 2. Material 1 is shown. Accordingly, in the elevation view, the left side is closer to the width direction end of the work machine 10, and the right side is closer to the center.

  In the inclined gap 1d, when the muddy water descending along the back surface of the mudguard 1 flows down through the gap 1d, the muddy water is sent toward the center of the work implement 10 so that the muddy water existing in front of the work implement 10 is present. The flow which goes to the center part side from the width direction both sides of the working machine 10 is generated on the water surface. 1- (a), FIG. 8, FIG. 10, FIG. 11- (a), so that the muddy water flows down from the gap 1d at a speed from the both sides in the width direction of the work machine 10 toward the center. (B) As shown to Fig.12 (a), the inclination which goes to the center part side from the width direction both sides of the working machine 10 is attached from the upper direction to the downward direction.

  As shown in FIGS. 1- (b) and 12- (b), the basic mudguard 1 is directed from the front to the rear on the surface of the receiving piece 1e from both sides in the width direction of the work machine 10 toward the center. Since it suffices that the shield cover 2 is connected to the front side in the direction of travel of the shield cover 2 in an inclined state, the lower end portion of each receiving piece 1e does not necessarily have to be inclined with respect to the horizontal. The lower end of the receiving piece 1e may be horizontal.

  Further, in any of FIGS. 8A, 8B, and 12A, the lower end portion of the receiving piece 1e is inclined upward from both sides in the width direction of the work machine 10 to the center side. Thus, the distance between the lower end portion of the receiving piece 1e and the muddy water surface is increased on the center side of the work machine 10 together with the formation of both side portions thereof in a curved shape. As a result, the floating substance existing on the front side of the mudguard 1 is easily taken into the shield cover 2 on the center side of the work machine 10 in each receiving piece 1e unit. Moreover, when the lower end part of the receiving piece 1e is immersed in muddy water like FIG.8- (b), it is easy to generate the water flow which goes to the center side of the working machine 10 in muddy water near the water surface.

  11- (a) is similar to FIGS. 1- (a), 8- (a), and (b), the requirement that the lower end of each receiving piece 1e is inclined, and from above to below. The manufacturing example of the mudguard material 1 provided with the receiving piece 1e divided | segmented into plurality by opening the gap | interval 1d with the inclination which goes to the center part side from the width direction both sides of the working machine 10 is shown. The arrows in FIG. 11- (a) indicate that the muddy water present in front of the mudguard 1 collides with the lower end of the mudguard 1, and from the both sides in the width direction of the work machine 10 having high resistance to the central part having low resistance. A moving water flow is generated and muddy water flows toward the center of the work machine 10 in the width direction. The lower end surface of the receiving piece 1e does not need to be a flat surface, and may be a curved surface.

  11- (b) is a cross-sectional view of the xx line, as shown in FIG. 11- (c), the surface from the back side of the mudguard 1 to the inclined lower end surface of each receiving piece 1e of the mudguard 1 An example of forming the receiving piece 1e in the case of obtaining the effect of guiding the muddy water colliding with the lower end surface of the mudguard 1 to the central part side of the work machine 10 by providing an inclination from the lower side to the upper side toward the side will be shown. In this case, if the lower end (lower end surface) of the receiving piece 1e is formed into a cylindrical surface that is concave or convex downward, or an elliptically curved surface that gradually changes in curvature, the work implement 10 can be applied to muddy water. The effect of generating a water flow toward the center side of is increased.

  12- (a) to (c) show that “the mudguard 1 having a plurality of receiving pieces 1e divided in the longitudinal direction is hung on the surface of the receiving piece 1e from the both sides in the width direction of the work machine 10 toward the central portion side. The manufacturing example of the mudguard material 1 with the requirement of “connected to the front side in the advancing direction of the shield cover 2 with an inclination from the front toward the rear” is shown. 12- (b) is a cross-sectional view taken along line yy of FIG. 12- (a), and FIG. 12- (c) is a perspective view of the mudguard 1. The mudguard 1 having the requirement that the surface of the receiving piece 1e is inclined does not matter whether the lower end is inclined as shown in FIG. A plurality of attachment portions 2b of the shield cover 2 (including the attachment plate 3) provided with an inclination in which the end portion on the center portion side is located on the rear side in the traveling direction with respect to both sides of the work machine 10 shown in FIG. The receiving pieces 1e are connected to each other to incline the receiving pieces 1e. In this case, as shown in FIG. 12- (c), the attachment portion 2b on the front surface of the shield cover 2 is obtained by being inclined such that the center side is the rear side in the traveling direction with respect to both sides of the work implement 10. In FIG. 12-(c), the right side is the center side of the mudguard 1.

In this case, as shown by the arrow in FIG. 12- (b), the muddy water present in front of the mudguard 1 is pushed against the surface of the receiving piece 1e, and the back side of the mudguard 1 from the gap 1d due to the inclination of the surface. To the center of the work machine 10 in the width direction. In this case, the surface of the receiving piece 1e does not need to be a flat surface, and may be a curved surface.

DESCRIPTION OF SYMBOLS 1 ... Mudguard, 1a ... Connection part, 1b ... Insertion hole, 1c ... Mud receiving part, 1d ... Gap, 1e ... Receiving piece,
2 ... Shield cover, 2a ... Connecting material, 21 ... End plate, 22 ... Bracket, 23 ... Pin, 2b ... Hanging part,
3 ... Mounting plate, 4 ... Fastener, 5 ... Holding material,
6 ... Tillage rotor, 7 ... Rotary shaft, 8 ... Nail,
10: Scraping work machine, 10A: Main body, 11: Top mast, 12: Lower link connecting part, 13: Gear box, 13a: Input shaft,
14: Transmission frame, 14a: Lower bracket, 14b: Upper bracket,
15: Support frame, 15a: Lower bracket, 15b: Upper bracket,
16 …… Chain transmission case, 17 …… End cover,
20 …… Tractor,
30 ... Extension work machine, 31 ... Shield cover, 32 ... End plate, 33 ... Bracket, 34 ... Tillage rotor, 35 ... Restraint device.

Claims (7)

In the scraper working machine equipped with a tilling rotor mounted on the rear part of the tractor and rotating around a horizontal axis by receiving power from the tractor and a shield cover covering the top thereof,
In a state in which the mudguard material having a plurality of receiving pieces divided in the longitudinal direction is inclined on the surface of the receiving piece from the front side to the rear side from the both sides in the width direction of the scraping work machine to the center side. A scraper working machine connected to the front side of the shield cover in the traveling direction.   An end portion of the receiving piece located on the center side of the scraping work machine is a rear side in an advancing direction from an end portion of the receiving piece adjacent to the receiving piece located on both sides in the width direction of the cutting work machine. The scraping work machine according to claim 1, wherein:   The lower end portion of each receiving piece of the mudguard material is provided with an inclination from the lower side to the upper side from both sides in the width direction of the scraping work machine to the center side. Item 3. The scraping work machine according to Item 2.   The said mudguard material is connected to the said shield cover in the state which inclined from the front side to the back side of the advancing direction of the said scraping work machine from the upper direction to the downward direction. The scraping work machine described in 1. Attached to the rear part of the tractor, connected to the shield cover of the scraper working machine comprising a tilling rotor that rotates around a horizontal axis in response to power from the tractor and a shield cover that covers the top thereof,
It has a plurality of receiving pieces divided in the longitudinal direction, and is connected to the shield cover in a state in which the surface of the receiving piece is inclined from the front to the rear from one side to the other side in the length direction. A mudguard material for scraping machines characterized by   An end portion located on the other side of the receiving piece is located on the rear side in the traveling direction with respect to an end portion located on one side in the length direction of the receiving piece adjacent to the receiving piece. The mudguard for a scraper working machine according to claim 5.   The scraping according to claim 5 or 6, wherein an inclination from the lower side to the upper side is given to the lower end portion of each receiving piece from the one side in the length direction to the other side. Mudguard material for work equipment.

Images