JP2021170949A - Tilling device - Google Patents

Abstract

To provide a tilling device that reduces a burden of maintenance work of a worker.SOLUTION: The tilling device comprises: a leveling body 5 provided in a traveling direction rear of a tilling body 3 and capable of being turned in a vertical direction; an arm 72 with a proximal end supported in a freely turning manner, and having a tip end connected to a connecting rod in a freely turning manner; a connecting rod 74 with one end connected to the arm in a freely turning manner, having the other end sliding over the leveling body, and connected to the leveling body in a lockable manner; a locking member 73 pivoted in a freely turning manner, and changing the turning direction of the arm by the locking position of the tip end; an elastic body 75 for biasing the arm in a traveling direction; and the other elastic body 76 for biasing the locking member. About a turning inhibition preparation posture/turning inhibition posture and a turning posture, the switching of the turning posture of the locking member can be performed with support of an auxiliary mechanism 7, and therefore the switching operation of the maintenance work/tilling work by a worker becomes easy, and also the lifting operation of the leveling body by the worker is light-weighted and the prevention of default can be achieved.SELECTED DRAWING: Figure 11

Description

The present invention relates to a working machine, and particularly to a tilling device mounted on the rear part of the machine body.

As a work device for cultivating and leveling soil, a cultivating device having a cultivated body and a cultivated body is known.

In this type of cultivator, the operator may lift the leveling body upward to perform maintenance work, leaving the cultivated body in an open state.

The wider the ground leveling width of the leveling body, the heavier the weight of the leveling body itself, which makes it difficult for the operator to lift the ground.

After the cultivating work, the soil adheres to the leveled body, so that the weight of the attached soil is added to the weight of the leveled body, which makes it more difficult to lift the ground leveled body upward.

In the conventional maintenance work, the operation of the assist mechanism is locked or unlocked by manually switching the lever provided in the assist mechanism.

However, if the operator neglects to switch the lever of the assist mechanism after use, the leveling body does not work normally during normal tillage work, and proper leveling by the leveling body cannot be performed.
Therefore, after using the assist mechanism, the operator must always perform the lever switching operation, and there is a problem that this switching operation is troublesome.

Japanese Patent No. 5902858

In view of the above background technique, the present invention aims to provide a tilling device that reduces the burden of maintenance work on the operator.

Another purpose is to improve the efficiency of switching from the maintenance work state to the tillage work state.

In order to solve the above problems, the cultivating device according to claim 1 of the present invention is a cultivating device including a cultivated body, and has a vertically rotatable ground preparation body provided behind the cultivated body in the traveling direction and a base end portion thereof. An arm that is rotatably supported and whose tip is rotatably connected to a connecting rod, one end that is rotatably connected to the arm, and the other end that slides on the ground preparation A state in which the posture of the arm is fixed or can be rotated by a connecting rod that moves and is rotatably connected to the ground preparation body and is rotatably pivotally attached to the locking position of the tip portion. It is characterized in that it is composed of a locking body that changes to, an elastic body that urges the arm in the traveling direction, and another elastic body that urges the locking body.
Further, in the cultivating device according to claim 2 of the present invention, in the cultivating device according to claim 1, the locking body is composed of a back portion and an abdomen, and an inclined surface to which the upper locking pin abuts is formed on the back portion, and the abdomen is formed. A fitting groove is formed in which the lower locking pin is locked.
Further, the cultivating device according to claim 3 of the present invention is characterized in that the cultivating device according to claim 2 is further provided with an upper stopper with which the back portion abuts and a lower stopper with which the abdomen abuts.
Further, in the tilling device according to claim 4 of the present invention, in the tilling device according to any one of claims 1 to 3, the lower locking pin is not locked in the fitting groove of the locking body to prevent rotation. It is characterized by forming a preparatory posture.
Further, in the cultivating device according to claim 5 of the present invention, in the cultivating device according to any one of claims 1 to 3, the locking body has the upper locking pin and the lower locking pin abutting on the back and abdomen. It is characterized by forming a non-rotatable posture.
Further, the cultivating device according to claim 6 of the present invention is the cultivating device according to any one of claims 1 to 3, wherein the lower locking pin is locked in the fitting groove of the locking body. Is characterized by forming.
The cultivating device according to claim 7 of the present invention is the cultivating device according to any one of claims 1 to 6, wherein the elastic body is made of a gas spring.
Further, the tilling device according to claim 8 of the present invention is the tilling device according to any one of claims 1 to 6, wherein the other elastic body is made of a coil spring.
Further, the cultivating device according to claim 9 of the present application is characterized in that the elastic body is single in the cultivating device according to any one of claims 1 to 8.
Further, the cultivating device according to claim 10 of the present invention is characterized in that the cultivating device according to any one of claims 1 to 8 has a plurality of the elastic bodies.
Further, the cultivating device according to claim 11 of the present invention is the cultivating device according to any one of claims 1 to 8, wherein the other elastic body is single.
Further, the cultivating device according to claim 12 of the present invention is the cultivating device according to any one of claims 1 to 8, wherein the other elastic body is a plurality of the above.
Further, the cultivating device according to claim 13 of the present invention is characterized in that the cultivating device according to any one of claims 1 to 12 has a single locking body.
Further, the cultivating device according to claim 14 of the present application is characterized in that the cultivating device according to any one of claims 1 to 12 has a plurality of the locking bodies.
Further, the cultivating device according to claim 15 of the present invention is characterized in that, in the cultivating device according to claim 14, the locking bodies are symmetrically arranged on both sides of the arm.

According to the tilling device according to the present invention, the rotation posture of the locking body can be switched with the support of the auxiliary mechanism with respect to the change of the rotation prevention preparation posture / rotation prevention posture and the rotatable posture. It is possible to facilitate the switching operation between the maintenance work and the tilling work by the worker, reduce the weight of the lifting operation of the ground leveling body by the worker, and prevent the worker from neglecting.

In the maintenance work, the worker only needs to move the ground leveling body up or down, and the worker does not need to perform the switching operation. Therefore, the switching operation between the maintenance work and the tilling work becomes easy, and the switching operation is neglected. Can be prevented. Moreover, since the troublesome switching operation such as unlocking is eliminated, the efficiency of switching from the maintenance work to the tilling work can be improved.

Moreover, in the ascending or descending motion of the ground leveling body, the operator can lift the ground leveling body with a small force by the elastic body, other elastic body, and the locking body that changes the posture. Can be reduced.

It is a front view which shows the embodiment of the tilling apparatus by this invention. It is a top view of FIG. It is a left side view of FIG. It is a perspective view of FIG. It is a VV end view of FIG. (A) is a VI-VI end view of FIG. 1, and (B) is a VII-VII end view of FIG. 1, both of which show a first step (rotation blocking posture) of posture change by a hook. FIG. 1 is a VII-VII end view of FIG. 1, showing a second step (rotation blocking posture) of posture change by a hook. FIG. 1 is a VII-VII end view of FIG. 1, showing a third step (rotatable posture) of posture change by a hook. FIG. 1 is a VII-VII end view of FIG. 1, showing a fourth step (rotatable posture) of posture change by a hook. It is a VII-VII end view of FIG. 1, and shows the fifth step (rotation prevention preparation posture) of the posture change by a hook. It is a VII-VII end view of FIG. 1, and shows the sixth step (rotation prevention preparation posture) of the posture change by a hook. It is an enlarged view of the hook, and shows the positional relationship with each part of FIGS. 6 to 11.

Next, the tilling device according to the present invention will be described in more detail based on the drawings showing the embodiments. For convenience, the parts that perform the same function are designated by the same reference numerals, and the description thereof will be omitted.

Reference numeral 1 denotes a tilling device used by being connected to the rear part of a traveling machine such as a tractor (not shown). Reference numeral 2 denotes a frame of the tilling device 1, which is a general term for frames of the airframe such as a pipe frame 2a, a front frame 2b, and a rear frame 2c. The tilling device 1 is connected to the traveling machine body by a mounting portion 20 including a top mast 21 having a top link pin 22 and a lower plate 23 having a lower link pin 24. Reference numeral 25 denotes an input case provided on the pipe frame 2a, which has an input shaft 25a. A transmission case 27 is provided on the side plate 26 provided at the end of the pipe frame 2a.

Reference numeral 3 denotes a tiller, which is composed of a rotor shaft 31 and a large number of tiller claws 32 provided on the rotor shaft 31. The tilling claw 32 is formed by being bent to the right or left side in the traveling direction A. Reference numeral 4 denotes a cover body that covers the upper part of the cultivated body 3, and is fixed to the rear frame 2c and the front frame 2b.

Reference numeral 5 denotes a ground leveling body made of a ground leveling plate provided behind the cultivated body 3, and is rotatably provided on a hinge 51 provided on the rear frame 2c. Reference numeral 52 denotes a holding plate, which is projected from the ground leveling body 5 and slidably locks the tip end portion of the connecting rod 74 described later. Reference numeral 5a is an extension leveling plate, and reference numeral 53 is a bracket.

Reference numeral 6 denotes a pressure adjusting mechanism including the pressure adjusting rod 61, which is provided at four locations in the illustrated example. One end of the pressure adjusting rod 61 is rotatably provided on the pipe frame 2a, and the other end is slidably or locked to the pressure adjusting rod holding portion 63 provided on the holding plate 52 so as to be pressurized / depressurized. NS. That is, the pressure adjusting rod 61 is provided with a regulating body 62 on one end side and a pressure adjusting rod holding portion 63 on the other end side at right angles to the axis, respectively, and before and after the pressure adjusting rod holding portion 63. The elastic body 64 for pressurization and the elastic body 65 for depressurization are pivotally attached. The pressurizing elastic body 64 can slide on the pressure adjusting rod 61. 61a is a fixing hole provided in the pressure adjusting rod 61, and 63a is a pin projecting from the pressure adjusting rod holding portion 63.

Reference numeral 7 denotes an arm 72, a hook 73, a connecting rod 74, a first elastic body 75, a second elastic body 76, an upper stopper 77a, a lower stopper 77b, an upper locking pin 78a, and a lower locking. It is an auxiliary mechanism including pins 78b. The arm 72 is rotatably provided on a bracket 71 whose base end is fixed to the pipe frame 2a, and the pressure adjusting rod 61 is rotatably attached to the tip.

The hook 73 is rotatably provided on the bracket 71. The hook 73 is composed of a back portion 73a and an abdomen 73b, an inclined surface is formed on the back portion 73a, and a fitting groove 73e is formed on the abdomen 73b. The back portion 73a and the abdomen 73b are continuously formed, and a first tip portion 73c is provided on the back portion 73a side and a second tip portion 73d is provided on the abdomen 73b side. 73e is a fitting groove provided in the second tip portion 73d, 73f is a base end portion of the hook 73, and 73g is a fulcrum of the hook 73. In the case of the illustrated example, a pair of the hooks 73 are provided symmetrically with respect to the traveling direction A with the arm 72 interposed therebetween for the stability and certainty of the rotational operation.

One end of the connecting rod 74 is rotatably connected to the arm 72, and the other end is rotatably connected to the bracket 53 and slides on the leveling body 5. Reference numeral 74a is a fulcrum for pivotally attaching the connecting rod 74 and the arm 72. Reference numeral 74b is a locking projection provided at the tip of the connecting rod 74, and is in a state of being in constant contact with the holding portion 79.

The first elastic body 75 is composed of a gas spring, is erected between the rear frame 2c and the arm 72, and urges the arm 72 in the traveling direction A. The second elastic body 76 is composed of a coil spring, is provided on the bracket 71, and urges the hook 73 to either the upper side or the lower side. In order to determine the rotation limit of the hook 73, an upper stopper 77a is provided on the bracket 71 located above the hook 73, and a lower stopper 77b is provided on the bracket 71 located below. Further, in order to ensure switching of the rotational posture of the hook 73, an upper locking pin 78a is provided on the arm 72 located above the hook 73, and a lower locking pin 78b is provided on the arm 72 located below. ..

Each of these parts makes it possible to change the rotational posture of the hook 73. That is, when the hook 73 is in a prostrated state, that is, when the second tip portion 73d abuts on the lower locking pin 78b and the abdomen 73b abuts on the lower stopper 77b, the “rotation prevention preparation posture” shown in FIG. To form. When the fitting groove 73e fits into the lower locking pin 78b and the lower stopper 77b comes into contact with the abdomen 73b, the "rotation blocking posture" shown in FIG. 6 is formed. Further, when the hook 73 is in an upright state, that is, when the back portion 73a abuts on the upper stopper 77a and the abdomen 73b becomes free, the "rotatable posture" shown in FIG. 8 is formed.
In the figure, 80 is a lever.

Next, the operation procedure of the tilling device according to the present invention will be described.

(1) Lifting operation of the ground leveling body The pin 63a of the pressure adjusting mechanism 6 is set in a state where it can be automatically locked, and then the lever 80 is pushed down.

Then, the tip portion 73c of the hook 73 urged by the second elastic body 76 is erected and rotates from the position shown in FIGS. 6A and 6 to the position shown in FIG. It becomes a "rotatable posture".
That is, the posture of the hook 73 is changed upward by the second elastic body 76, and the back portion 73a is in contact with either the upper stopper 77a or the upper locking pin 78a, and this state is maintained (FIG. 8). At this time, the abdomen 73b is free. Therefore, the arm 72 is in a rotatable state.

Next, the arm 72 generates a force to rotate in the traveling direction A by the urging force of the first elastic body 75, and the connecting rod 74 interlocking with this generates the urging force to rotate the ground leveling body 5 upward as well. When the operator rotates the leveling body 5 upward in this state, the position is as shown in FIG. In this "rotatable posture", the pressure adjusting rod 61 slides on the pressure adjusting rod holding portion 62 as the ground leveling body 5 rotates, regardless of the posture of the hook 73. At this time, the connecting rod 74 does not slide on the ground leveling body 5, and the ground leveling body 5 is always locked at the end of the connecting rod 74.

Next, the leveling body 5 is raised by the operator. Along with this ascending rotation operation, the ground leveling body 5 is in a state of being constantly urged upward, so that it is in a state of being caught by the locking projection 74b of the connecting rod 74.

The operator lifts the leveling body 5 in this state. Since the ground leveling body 5 is in a state of being urged upward via the arm 72, the connecting rod 74, and the holding portion 79 for the auxiliary mechanism, the operator can easily lift it, and the lifting operation becomes easy.

When the upward rotation of the ground leveling body 5 is continued from the position of the alternate long and short dash line in FIG. 10 to the position shown by the solid line, the back portion 73a is pushed by the abutting upper locking pin 78a, so that the hook 73 rolls over and the tip portion. The contact between the 73c and the pin changes from the tip 73c on the back 73a side to the tip 73d on the abdomen 73b side, and the tip 73d on the abdomen 73b side comes into contact with the lower locking pin 78b (FIG. 10).

At this time, in the hook 73, the tip portion 73c is urged downward by the second elastic body 76 to rotate, and the abdomen 73b is in contact with the lower stopper 77b or the tip portion 73d on the abdomen side is the lower locking pin 78b. It is in one of the states of being in contact with the head, and is in the "rotation prevention preparation posture" (FIG. 10).

Even in this rotation-preventing preparatory posture, the urging force of the first elastic body 75 against the ground leveling body 5 is continued. Therefore, the operator can lift the leveling body 5 with a small force.

Further, when the ground leveling body 5 is rotated upward and the ground leveling body 5 is rotated to a predetermined rotation angle, the pin 63a of the pressure adjusting mechanism 6 is automatically fitted into the fixing hole 61a of the pressure adjusting rod 61. Therefore, the rotation of the leveling body 5 is completed, and the position of the leveling body 5 is fixed in the “fixed posture”. At this time, the hook 73 maintains the rotation-preventing preparatory posture even though the lower stopper 77b is in contact with the abdomen 73b and the abdominal tip 73d is separated from the lower locking pin 78b (FIG. 11).

In the rotation blocking preparation posture, either the second tip 73d is separated from the lower locking pin 78b (FIG. 11) or the second tip 73d is in contact with the lower locking pin 78b (FIG. 10). good.
When the leveling body 5 is rotated upward and the arm 72 is rotated as shown by the alternate long and short dash line in FIG. 10, the lower locking pin 78b comes into contact with the second tip portion 73d toward the first tip portion 73c. However, it moves relatively. Further, as the upward rotation of the ground leveling body 5 progresses, as shown in FIG. 11, the abdomen 73b hits the lower stopper 77b and the rotation of the hook 73 is restricted, but the ground leveling body 5 is urged to be interlocked with the ground leveling body 5. Since the arm 72 continues to rotate, the second tip portion 73d is separated from the lower locking pin 78b. As described above, the rotation prevention preparation posture does not matter whether the second tip portion 73d and the lower locking pin 78b are in contact with each other.

(2) Lowering operation of the ground leveling body First, the fitting of the pin 63a of the pressure adjusting mechanism 6 and the fixing hole 61a of the pressure adjusting rod 61 is released, and the ground leveling body 5 is made rotatable. At this time, the hook 73 remains in the “rotation prevention preparation posture” (FIG. 11).

While the operator supports the leveling body 5 from below, the leveling body 5 is rotated downward from the position shown by the solid line in FIG. 11 to the position shown by the solid line in FIG. At this time, since the urging force of the first elastic body 75 is urged to the ground leveling body 5 via the arm 72, the connecting rod 74, etc., the operator does not support the full load of the leveling body 5. can do.

The arm 72 is interlocked with the downward rotation of the leveling body 5, and the upper end portion of the arm 72 rotates rearward in the traveling direction A from the position shown by the alternate long and short dash line in FIG. 10 to the position shown by the solid line.

At the same time, since the lower locking pin 78b pushes up the tip portion 73d of the hook 73, the contact position of the tip portion 73c moves slightly downward from the position shown in FIG. 11 to the position shown in FIG.

When the downward rotation of the ground leveling body 5 is continued to the lower limit positions shown in FIGS. 6A and 6B, the lower locking pin 78b fits into the fitting groove 73e of the hook 73, so that the hook 73 becomes " The rotation-preventing posture is set, and the urging force of the first elastic body 75 against the arm 72 is blocked. As a result, the urging assistance to the ground leveling body 5 by the first elastic body 75 ends, and the normal working state is automatically entered.
In the "rotation prevention preparation posture" shown in FIG. 10, since the urging assistance to the ground leveling body 5 is always performed, the vertical rotation operation of the ground leveling body 5 while maintaining the assisted state. Can be freed.

When the hook 73 is in the rotation-preventing posture, the urging assistance to the ground leveling body 5 by the first elastic body 75 is released. Become. Tilling work is performed in this normal state.

(3) During normal plowing work With the ground leveling body 5 lowered to the lowermost end, the hook 73 is placed in a rotation-preventing posture to fix the rotation of the arm 72 (FIG. 6). At this time, the urging of the first elastic body 75 with respect to the ground leveling body 5 is released.

The ground leveling body 5 is lifted relative to the frame 2, the tiller body 3, and the upper cover body 4 depending on the nature of the soil.

Since the ground leveling body 5 is not urged upward by the first elastic body 75, it is possible to level the ground by applying an appropriate ground contact pressure to the soil (FIG. 7).

Since the pressure adjusting rod 61 is slidable by the pressure adjusting rod holding portion 63, the ground leveling body 5 can freely rotate up and down without being hindered from rotating, so as to follow the ground. It is possible to level the ground.

Here, the rotation posture of the hook is defined.
The "rotatable posture" is a state in which the first tip 73c and the second tip 73d of the hook 73 are lifted upward, and the upper locking pin 78a and the lower locking pin 78b are attached to the back 73a and the abdomen 73b. A state in which the arm 72 can be rotated without contact (FIGS. 8 and 9).
The "rotation prevention preparation posture" is a state in which the first tip portion 73c and the second tip portion 73d of the hook 73 are lowered downward, and the arm 72 can be rotated, that is, the fitting groove 73e. The lower locking pin 78b is not locked, and includes a fixed state in which the ground leveling body 5 is fixed to rotate upward by the pin 63a of the pressure adjusting mechanism 6 (FIGS. 10 and 11).
The "rotation blocking posture" is a state in which the first tip portion 73c and the second tip portion 73d of the hook 73 are lowered downward, and the lower locking pin 78b is locked in the fitting groove 73e, and the arm 72. Refers to a state in which the rotation of is fixed (FIGS. 6 and 7).

The definitions of the posture and state of the ground leveling body 5 are as follows.
The “fixed posture” refers to a state in which the pin 63a of the pressure adjusting mechanism 6 is fitted into the fixing hole 61a so that the ground leveling body 5 cannot rotate (fixed). That is, it is not directly related to the posture of the hook 73.
The "working state" means a state in which the ground leveling body 5 is not urged, that is, a state in which the hook 73 is in a "rotation-preventing posture" and normal tillage work can be performed.
The "auxiliary state" means a state in which the ground leveling body 5 is urged, that is, the hook 73 is in a "rotatable posture" or a "rotation prevention preparation posture", and maintenance work can be performed.

The tilling device according to the present invention is not limited to the above-described embodiment. For example, the number of the first elastic body 75 is two in the illustrated example, but it may be a single one, and the number of the first elastic body 75 may be arbitrary. Similarly, although the number of the second elastic body 76 is two in the illustrated example, it may be a single number, and the number of the second elastic body 76 may be arbitrary. Although the number of hooks 73 is two in the illustrated example, the number of hooks 73 may be one, and the number of hooks 73 may be arbitrary. When the hook 73, the first elastic body 75, and the second elastic body 76 are made into a plurality of pieces, even if the dimensions of each member are reduced, the auxiliary mechanism is in the rotation-preventing posture of the hook 73 for fixing the position of the leveling body 5. Since the strength of the 7 as a whole is ensured, the posture is surely maintained, and even if it is used repeatedly, deformation and breakage are unlikely to occur, so that stable operation can be performed.

Further, the lower stopper 77b can be abolished by setting a long contact distance from the second tip portion 73d to the first tip portion 73c. In the rotation blocking preparation posture in this case, the lower locking pin 78b is always in contact with the second tip portion 73d to the first tip portion 73c. In this embodiment, it is necessary to lengthen the second tip portion 73d to the first tip portion 73c, but since the lower stopper 77b is abolished, the number of members of the entire mechanism can be reduced for simplification.
On the other hand, in the embodiment described in the main text, since the distance between the second tip portion 73d and the first tip portion 73c that slides while the sliding lower locking pin 78b is in contact with each other can be set short, the rotation blocking posture can be set. At this time, the protruding distance that protrudes forward from the arm 73 can be shortened. Therefore, it is possible to prevent an unexpected fear that the operator is caught in the first tip portion 73c.

The invention of the present application can be utilized for agricultural work and the like.

1 Tillage device 2 Frame 2a Pipe frame 2b Front frame 2c Rear frame 20 Mounting part 21 Top mast 22 Top link pin 23 Lower plate 24 Lower link pin 25 Input case 25a Input shaft 26 Side plate 27 Transmission case 3 Tiller 31 Rotor shaft 32 Tillage Claw 4 Cover body 5 Ground leveling body 5a Extended ground leveling plate 51 Hinge 52 Holding plate 53 Bracket 6 Pressure adjusting mechanism 61 Pressure adjusting rod 61a Fixing hole 62 Regulator 63 Pressure adjusting rod holding part 63a Pin 64 Pressurizing elastic body 65 Elasticity for decompression Body 7 Auxiliary mechanism 71 Bracket 72 Arm 73 Hook 73a Back 73b Abdomen 73c First tip 73d Second tip 73e Fitting groove 73f Base end 73g Support point 74 Connecting rod 74a Support point 74b Locking protrusion 75 First elastic body 76 2 Elastic body 77a Upper stopper 77b Lower stopper 78a Upper locking pin 78b Lower locking pin 79 Holding part 80 Lever

Claims (15)

It is a cultivating device equipped with a cultivating body.
A vertically rotatable ground leveling body provided behind the cultivated body in the direction of travel,
An arm whose base end is rotatably supported and whose tip is rotatably connected to a connecting rod,
A connecting rod in which one end is rotatably connected to the arm and the other end slides on the leveling body and is lockably connected to the leveling body.
A locking body that is rotatably pivotally attached and changes the posture of the arm to a fixed state or a state that enables rotation depending on the locking position of the tip portion.
An elastic body that urges the arm in the direction of travel,
A tilling device characterized by being composed of another elastic body that urges the locking body. In the tilling device according to claim 1, the locking body is composed of a back portion and an abdomen, an inclined surface to which the upper locking pin abuts is formed on the back portion, and a fitting in which the lower locking pin is locked to the abdomen. A tilling device characterized in that a groove is formed. The cultivating device according to claim 2, further comprising an upper stopper with which the back portion abuts and a lower stopper with which the abdomen abuts. The tilling device according to any one of claims 1 to 3, wherein the lower locking pin is not locked in the fitting groove of the locking body to form a rotation-preventing preparatory posture. Device. The tilling device according to any one of claims 1 to 3, characterized in that the locking body forms a rotatable posture in which the upper locking pin and the lower locking pin do not abut on the back and abdomen. Cultivation equipment. The cultivating device according to any one of claims 1 to 3, wherein the cultivating device forms a rotation-preventing posture in which the lower locking pin is locked in the fitting groove of the locking body. The cultivating device according to any one of claims 1 to 6, wherein the elastic body is made of a gas spring. The tilling device according to any one of claims 1 to 6, wherein the other elastic body is made of a coil spring. The cultivating device according to any one of claims 1 to 8, wherein the elastic body is single. The cultivating device according to any one of claims 1 to 8, wherein the cultivating device has a plurality of elastic bodies. The cultivating device according to any one of claims 1 to 8, wherein the other elastic body is single. The cultivating device according to any one of claims 1 to 8, wherein the cultivating device has a plurality of the other elastic bodies. The cultivating device according to any one of claims 1 to 12, wherein the locking body is single. The cultivating device according to any one of claims 1 to 12, wherein the cultivating device has a plurality of the locking bodies. The cultivating device according to claim 14, wherein the locking bodies are symmetrically arranged on both sides of the arm.

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