JP2009284856A - Accessory of tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suggest an accessory of a tiller capable of preventing inflow of earth and sand into rotors. <P>SOLUTION: The accessory of tiller includes: plates (side plates) 1 connected to the ends of rotors 2; and restricting plugs 7 inserted into inserting holes 1d formed in the plates 1, in which projections (rotation members) 6b formed in other accessories (wheels for transfer) 6 when the other accessories 6 are attached to the plates 1. The restricting plugs 7 have inserting parts 7A inserted into the inserting holes 1d and locking parts (projections) 7C locking with the plates 1 when inserting parts 7A are inserted into the inserting holes 1d, and groove parts 1j in which locking parts 7C are inserted are formed in the plates 1 and wall faces of the groove parts 1j are opposed to the locking parts 7C in the circumferential direction of the inserting parts 7A and raises from the insides of the groove parts 1j to the outsides. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an accessory attached to an end face of a rotor constituting a tiller.

  In order to supplement a basic cultivator having a cultivating function, particularly a walk-type cultivator, an accessory may be attached to the end face of the rotor of the cultivator (see, for example, Patent Document 1).

  The accessory of the tiller described in Patent Document 1 is a rotor disk having a function of facilitating the installation of a moving wheel, which is another accessory, on the tiller. A shaft cylinder fitted to the wheel shaft projects from the surface facing the rotor of the tiller.

JP-A-5-193530 (paragraphs 0007 to 0009, FIG. 2)

  Since the inside of the shaft of the rotor disk, which is an accessory, is formed so as to penetrate in the axial direction, when plowing work is performed with the moving wheels not attached to the rotor disk, the soil and the like in the field It flows into the shaft tube and the shaft tube is closed. As a result, there is an inconvenience that the moving wheel as another accessory cannot be attached to the rotor disk.

  In view of the above background, the present invention proposes a tiller accessory that can prevent clogging of the part to which other accessories such as a moving wheel are attached by earth and sand.

  The accessory of the cultivator of the invention described in claim 1 is an accessory of the cultivator attached to the end portion of the rotor of the cultivator, and includes a plate connected to the end portion of the rotor, and the plate. And a plug that is inserted into an insertion hole formed in the plate, into which a protrusion formed on the other accessory is inserted when the accessory is attached, and the plug is inserted into the insertion hole An insertion portion that is inserted into the insertion hole, and a locking portion that is locked to the plate when the insertion portion is inserted into the insertion hole, and a groove portion into which the locking portion is inserted is formed in the plate, The wall surface of the groove part is opposed to the locking part in the circumferential direction of the insertion part, and rises from the inside to the outside of the groove part.

  As the plate, a steel member having high bending rigidity is used. The shape of the plate is appropriately designed according to its use and function. As the plug, a deformable member such as a synthetic resin or rubber member is used.

  During the tilling work, since the insertion portion of the closing plug is inserted into the insertion hole formed in the plate, the inflow of earth and sand into the rotor through the insertion hole is prevented. And since a latching | locking part latches to a plate, an obstruction | occlusion stopper is not pushed into the inside of a rotor with soil during a tilling operation.

  The locking part is accommodated in the groove part in use and faces the wall surface of the groove part in the circumferential direction of the insertion part, and the wall surface of the groove part rises from the inside to the outside. When rotated in the direction, the plug is pushed up by the wall of the groove. Therefore, the obturator plug is rotated outward in the axial direction of the insertion portion while being rotated, and comes out of the insertion hole.

According to a second aspect of the present invention, a flange portion is formed on the insertion portion, the locking portion is formed on an outer periphery of the flange portion, and an accommodation recess for accommodating the flange portion is formed on the plate. The insertion hole is formed from the bottom surface of the housing recess, and the groove is formed from the wall surface of the housing recess.

  That is, since the flange portion is formed outside the insertion portion, and the flange portion is formed over the entire circumference of the insertion portion, when the flange portion is locked to the plate, the flange portion is inserted into the insertion hole and the insertion portion. To block between. Therefore, inflow of earth and sand is prevented more reliably.

  The invention according to claim 3 is characterized in that a cutout portion parallel to the axial direction of the insertion portion is formed in the insertion portion of the closing plug. Therefore, the insertion portion can be deformed toward the center of the insertion portion. Therefore, even if the cross section orthogonal to the axis of the insertion portion is formed larger than the cross section orthogonal to the axis of the insertion hole, the insertion portion can be inserted into the insertion hole. As a result, when the insertion portion is inserted into the insertion hole, the insertion portion is forcibly deformed and contracted toward the center portion, so that a load due to a restoring force is applied to the wall surface of the insertion hole. Therefore, a frictional force is generated between the insertion portion and the wall surface of the insertion hole, and the insertion portion is restrained by the wall surface of the insertion hole, so that the insertion portion is prevented from coming out of the insertion hole.

  A plate connected to the end of the rotor, and when another accessory is attached to this plate, it is inserted into an insertion hole formed in the plate into which a protrusion formed on this other accessory is inserted. The closure plug includes an insertion portion that is inserted into the insertion hole, and a locking portion that is locked to the plate when the insertion portion is inserted into the insertion hole, so that other accessories can be attached. It is possible to prevent the insertion hole from being blocked by earth and sand.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. In FIG. 1, the tiller accessory of the present invention bites into the soil when the rotor 2 constituting the walking type tiller (hereinafter referred to as a tiller) 10 rotates in one direction and rotates in the other direction. A specific example used for the side plate 1 (rotor disc) that sometimes floats against the soil is shown.

  As shown in FIG. 2, the cultivator 1 includes a drive source 3 such as an engine, and a power transmission mechanism 4 installed on the lower surface of the drive source 3 to transmit the power generated by the drive source 3 to the rotor 2. . A rotary shaft 4a protrudes at the end of the power transmission mechanism 4 in the direction orthogonal to the moving direction of the tiller 1, and the rotary shaft 4a rotates via the power transmission mechanism 4 by the power generated by the drive source 2. . The rotor 2 is detachably mounted on the rotating shaft 4a, for example, and the side plate 1 is fixed to the outer end surface of the rotating shaft 4a of the rotor 2 in the axial direction. Therefore, when the rotating shaft 4a rotates, the side plate 1 and the rotor 2 rotate together.

  As shown in FIG. 3, a connection recess formed in a substantially central portion of the surface of the side plate 1 facing the rotor 2 from the end surface of the rotor 2 facing the side plate 1 in parallel with the rotating shaft 4 a of the power transmission mechanism 4. A connection protrusion 1a to be inserted into 2a is formed. In addition, the auxiliary plate is inserted into the auxiliary connection recess 2c formed in the connection piece 2b erected from the side surface of the rotor 2 at a predetermined distance from the connection protrusion 1a on the surface of the side plate 1 facing the rotor 2. The connection protrusion 1b is formed in the same direction as the connection protrusion 1a. The side plate 1 is connected to the rotor 2 and can be rotated together with the rotor 2 by inserting the connection projection 1a and the auxiliary connection projection 1b of the side plate 1 into the connection recess 2a or the auxiliary connection recess 2c, respectively.

  As shown in FIGS. 4A and 4B, a plurality of claw portions 1A (three in FIGS. 4A and 4B) are formed on the outer peripheral portion of the side plate 1 at regular intervals in the circumferential direction, for example. The claw portion 1A is bent or curved in the same direction as the connection protrusion 1a is formed toward the tip. The tip of the claw portion 1A is formed in a pointed shape, and the side surface of the claw portion 1A is formed in a curved shape that swells outward. Therefore, the side plate 1 bites into the soil by rotating in one direction in the soil during the tillage operation, and rises with respect to the soil by rotating in the other direction.

  As shown in FIGS. 1 and 2, a moving wheel 6 may be attached to the outer surface of the side plate 1 (the surface opposite to the surface on which the connection protrusion 1 a is formed). This moving wheel 6 is mainly used when the cultivator 10 is moved on a farm field or on a road in situations other than tilling work.

  The moving wheel 6 is connected to the side plate 1 by, for example, a connecting portion 6A, and the connecting portion 6A of the moving wheel 6 is rotatably connected to a tire portion 6B located outside when connected to the side plate 1. 6 A of connection parts have the fixing member 6a for fixing the wheel 6 for a movement to the side plate 1, and the rotation member 6b which comprises the rotating shaft of the tire part 6B.

  A through hole 1c that is inserted into the rotating member 6b of the moving wheel 6 is formed through the inside of the connecting projection 1a of the side plate 1 in the axial direction, and is also inserted into the rotating member 6b in the side plate 1 as well. An insertion hole 1d is formed. In the present embodiment, the connection protrusion 1a is fixed in a state of being inserted into the insertion hole 1d.

  When the rotating member 6b of the moving wheel 6 is inserted into the through hole 1c, a fixing hole 1e for fixing the moving wheel 6 to the side plate 1 is formed at a position that can face the fixing member 6a of the side plate 1. ing. The fixing hole 1e includes an insertion portion 1f into which the fixing member 6a of the moving wheel 6 is inserted, and a fitting portion 1g formed from the insertion portion 1f and fitted into the fixing member 6a. The fitting portion 1g is formed on a circumference C having a center at the axis of the connection protrusion 1a and a radius L between the axis that is the center and the center of the insertion portion 1f (FIG. 4A). reference).

  A locking piece 6c that can be locked to the surface of the side plate 1 facing the rotor 2 when the fixing member 6a is inserted into the fixing hole 1e of the side plate 1 is formed at the tip of the fixing member 6a of the moving wheel 6. ing. A body portion 6d formed of a portion excluding the locking piece 6c of the fixing member 6a is fitted to the fitting portion 1g of the fixing hole 1e on its side surface.

  Therefore, the fixing member 6a inserted into the insertion portion 1f of the fixing hole 1e of the side plate 1 is connected to the connecting protrusion 1a when the moving wheel 6 is rotated around the rotating member 6b inserted into the through hole 1c. Rotate around the axis. As a result, when the body 6d of the fixing member 6a is fitted into the fitting portion 1g of the fixing hole 1e, the moving wheel 6 is fixed to the side plate 1, and at the same time, the locking piece 6c is locked to the side plate 1. This prevents the moving wheel 6 from coming off the side plate 1.

  Thus, by attaching the moving wheel 6 from the outer surface of the side plate 1, the cultivator 10 can be easily moved. On the other hand, in order to perform the function of the side plate 1 during the tilling work, it is necessary to remove the moving wheel 6. Here, since the through hole 1c (insertion hole 1d) into which the rotating member 6b of the moving wheel 6 is inserted also communicates with the outside, during the tilling work, the through hole 1c is connected to the through protrusion 1a from the outside in the axial direction. The blocking plug 7 is inserted. Therefore, blockage of the through hole 1c (insertion hole 1d) with earth and sand is prevented.

  As shown in FIGS. 5A to 5C, the blocking plug 7 includes an insertion portion 7 </ b> A that is inserted into the through hole 1 c, and a flange portion that is formed at the distal end portion of the insertion portion 7 </ b> A and is engaged with the outer surface of the side plate 1. 7B, and the outer periphery of the flange portion 7B is formed with a protrusion 7C that is locked to the outer surface of the side plate 1 and that is used when being removed from the side plate 1.

  As shown in FIGS. 6 (a) and 6 (b), an accommodation recess 1h in which the flange portion 7B of the closure plug 7 is accommodated is formed on the surface opposite to the surface on which the connection projection 1a of the side plate 1 is formed. (See FIGS. 3A and 3B). Since the insertion hole 1d into which the insertion part 7A of the closure plug 7 is inserted is formed from the bottom surface of the housing recess 1h, the flange part 7B is inserted when the insertion part 7A is inserted into the insertion hole 1d (or the through hole 1c). While being locked to the side plate 1 at the bottom surface of the housing recess 1h, it is housed in the housing recess 1h. In the drawing, the depth of the housing recess 1h is equal to or greater than the thickness of the flange portion 7B, and the outer surface of the flange portion 7B is within the housing recess 1h (upper surface of the housing recess 1h). Even if the rotor rotates together with the rotor 2, the blocking plug 7 is not forcibly removed by receiving a resistance force from the soil or the like at the flange portion 7B.

  Further, in the drawing, since the flange portion 7B is formed over the entire circumference in the circumferential direction of the insertion portion 7A, when the flange portion 7B is locked to the side plate 1, the flange portion 7B causes the connection protrusion 1a to be outside in the axial direction. And the through hole 1c are completely blocked, and the blockage of the through hole 1c (insertion hole 1d) with earth and sand is prevented.

  In FIG. 3 (b), the surface of the side plate 1 on which the connection protrusion 1a is formed is for preventing bending deformation of the claw part 1A from the vicinity of the connection protrusion 1a to the tip of the claw part 1A. Ribs 1i are formed. A groove portion 1j is formed at a position corresponding to the rib 1i on the surface opposite to the surface on which the connection protrusion 1a of the side plate 1 is formed. The groove 1j is formed when the rib 1i is formed, and the surface opposite to the surface on which the connection protrusion 1a is formed is pressurized, so that the pressure is applied to the surface. A groove 1j is formed, and a rib 1i is formed on the opposite surface.

  As shown in FIGS. 6A and 6B, the groove 1j is continuous with the housing recess 1h, and is formed, for example, on the outer periphery of the housing recess 1h at equal intervals in the circumferential direction. Here, protrusions 7C are formed on the outer periphery of the flange portion 7B of the closing plug 7 at the same interval as the interval in the circumferential direction in which the groove portion 1j is formed. That is, the side plate 1 is formed with recesses (or groove portions, hole portions) corresponding to the flange portions 7B and the projections 7C of the closing plug 7. When the blocking plug 7 is attached to the side plate 1 and the insertion portion 7A of the blocking plug 7 is inserted into the insertion hole 1d, the locking portion 7B is accommodated in the groove portion 1j, and the wall surface of the locking portion 7B and the groove portion 1j is It faces the circumferential direction of the side plate 1 or the housing recess 1h.

  Since the wall surface of the groove portion 1j is inclined so as to rise from the inner side to the outer side in the direction orthogonal to the direction of the groove portion 1j, the projection plug is rotated by rotating the closing plug 7 in the circumferential direction of the insertion portion 7A. At the same time that the bottom surface of 7c is pushed up to the wall surface of the groove 1j, the closing plug 7 moves outward in the axial direction of the insertion portion 7A (FIGS. 7A, 7B, 8A, 8B). reference). At this time, the closure plug 7 can be easily rotated by hooking a finger on the protrusion 7C. The wall surface shape of the groove 1i may be flat or curved.

  In addition, as shown in FIG. 5A, a predetermined tool (not shown) such as a driver or a coin can be inserted into the surface of the closing plug 7 opposite to the surface where the insertion portion 7A is formed. A possible insertion recess 7b is formed. By inserting a screwdriver or a coin into the insertion recess 7b and rotating it in the circumferential direction of the insertion portion 7A of the closure plug 7, the closure plug 7 attached to the through hole 1c is easily rotated and removed. (See FIGS. 6-8).

  5 (b) and 5 (c), for example, notches 7a parallel to the axis of the insertion portion 7A are formed in the insertion portion 7A of the closing plug 7 at a predetermined interval in the circumferential direction of the insertion portion 7A. By this cutout portion 7a, the insertion portion 7A can be deformed as a whole toward the center of the insertion portion 7A, in other words, can be deformed so as to contract. Therefore, even if the cross section perpendicular to the axis of the insertion portion 7A is larger than the cross section of the through hole 1c perpendicular to the axis, the insertion portion 7A can be inserted into the through hole 1c.

  This is because, when the notch 7a is not formed and the insertion portion 7A is continuously formed over the entire circumference, the insertion portion 7A is partially deformable toward the center, This is because, by being continuously formed over the circumference, other portions are deformed outward in conjunction with the deformation, and therefore the insertion portion 7A cannot be contracted as a whole.

  By forming the cross section perpendicular to the axis of the insertion portion 7A to be larger than the cross section perpendicular to the axis of the through hole 1c, when the insertion portion 7A is inserted into the through hole 1c, the insertion portion 7A is forcibly centered. It is deformed toward At this time, the insertion portion 7A exerts a force on the wall surface of the through hole 1c by a restoring force. As a result, a frictional force is generated between the insertion portion 7A and the wall surface of the through hole 1d, so that the closing plug 7 is restrained by the through hole 1c by the frictional force and is difficult to be removed from the through hole 1c. Removal from the hole 1c is prevented.

  In the drawing, since the insertion portion 7A is formed in a cylindrical shape, a portion sandwiched between the notches 7a and 7a in the circumferential direction of the insertion portion 7A is in a cantilever state. Therefore, for example, the bending rigidity in the radial direction of the connection protrusion 1a is reduced as compared with the case where the insertion protrusion 7a is not hollow, so that the insertion portion 7A can be easily deformed.

It is a side view of the field cultivator in which the accessory of the field cultivator of the present invention is used. It is a rear view of the field cultivator of FIG. It is an exploded view of the rotor of FIG. 1, a side plate, and the wheel for a movement. (A) is a top view of a side plate, (b) is a perspective view of a side plate. (A) is a top view of an obstruction stopper, (b) is a bottom view of an obstruction stopper, and (c) is a side view of an obstruction stopper. (A) is a top view showing a mode that the closure plug is attached to the side plate, (b) is a perspective view showing a mode that the closure plug is attached to the side plate. (A) is a top view showing a mode that the obstruction stopper attached to the side plate is rotated, (b) is a perspective view showing a mode that the obstruction plug attached to the side plate is rotated. (A) is a top view showing a mode that the obstruction | occlusion stopper was removed, (b) is a perspective view showing a mode that the obstruction | occlusion plug was removed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Side plate (plate), 1A ... Nail | claw part, 1a ... Connection protrusion, 1b ... Auxiliary connection protrusion,
1c …… through hole, 1d …… insertion hole,
1e: fixing hole, 1f: insertion portion, 1g: fitting portion, 1h: accommodating recess,
1i: rib, 1j: groove, 1k: insertion recess,
2 ... Rotor, 2a ... Connection recess, 2b ... Connection piece, 2c ... Auxiliary connection recess,
3 ... drive source, 4 ... power transmission mechanism, 4a ... rotating shaft,
6 ... Wheel for movement (other accessories), 6A ... Connecting part, 6B ... Tire part,
6a: fixing member, 6b: rotating member (protrusion), 6c: locking piece, 6d: trunk,
7 .. plugging stopper, 7A .. insertion portion, 7B .. flange portion, 7C... Projection (locking portion),
7a: Notch, 7b: Insertion recess, 10: Tiller

Claims (3)

A tiller accessory attached to the end of the rotor of the tiller,
A plate connected to an end of the rotor;
A plug that is inserted into an insertion hole formed in the plate, into which a protrusion formed in the other accessory is inserted when another accessory is attached to the plate;
The closure plug has an insertion portion to be inserted into the insertion hole, and a locking portion to be locked to the plate when the insertion portion is inserted into the insertion hole,
The plate is formed with a groove into which the locking portion is inserted,
The wall surface of the groove portion faces the locking portion in the circumferential direction of the insertion portion, and rises from the inside to the outside of the groove portion. A flange portion is formed in the insertion portion,
The locking portion is formed on the outer periphery of the flange portion,
The plate is formed with an accommodating recess for accommodating the flange portion,
The insertion hole is formed from the bottom surface of the housing recess,
The tiller accessory according to claim 1, wherein the groove is formed from a wall surface of the housing recess.   The cultivator accessory according to claim 1 or 2, wherein a cutout portion parallel to an axial direction of the insertion portion is formed in the insertion portion of the closing plug.

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