JP2544261Y2 - Operation device for walking type mobile agricultural machine for paddy field - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking type mobile agricultural machine for paddy fields such as a walking type rice transplanter, and more specifically, for a paddy field in which the body height can be automatically controlled by a body height detecting mechanism such as a float. The present invention relates to a device for operating a body height of a walking-type mobile agricultural machine by using two levers, a traveling clutch lever connected to a traveling clutch and a work clutch lever coupled to a work clutch.

[0002]

2. Description of the Related Art Heretofore, the present applicant has disclosed, for example,
As described in Japanese Patent Publication No. 1123, the above-described two-lever airframe height operation device has been devised.

According to this operating device, the traveling clutch is turned on / off from a traveling clutch operation lever via a wire, and a switching valve of a hydraulic cylinder for controlling the height of the machine body is actuated via another wire. The operating plate to be turned is being operated. Similarly, the work clutch is turned on / off from a work clutch operation lever via a wire, and the operation plate is rotated via another wire.

[0004]

However, two wires are respectively bent from the above-mentioned two operation levers so as to pass between other devices, so that the structure becomes complicated and The number of mounting parts increases. Further, there is a drawback that the operation by the wire has a large resistance and the operation of the operation lever becomes heavy.

Accordingly, the present invention provides a shaft extending in the lateral direction of the fuselage, which distributes the operating portion of the work clutch system and the operating portion of the traveling clutch system to the left and right, and switches the right or left switching valve of the body. It is an object of the present invention to provide an operation device for a walking-type mobile agricultural machine for paddy fields, in which the above-mentioned problem is solved by providing an accommodation mechanism linked in a predetermined accommodation relation.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a first operating lever (2) and a traveling clutch (3) connected to a work clutch (1). A second operating lever (5) connected to the
Further, a paddy wheel (7) is provided on a swing member (6) that is swingably supported by the body (35), and the swing member (6) is further provided.
Is connected to a hydraulic actuator (9), a switching valve (10) communicating with the hydraulic actuator (9) is connected to a body height detecting mechanism (11, 12), and the switching valve (10) is switched to In a walking-type mobile agricultural machine for paddy fields (P) configured to be able to automatically control the height, an axis (16) that extends through the transmission case (32) and extends in the lateral direction of the body is provided. A connecting member (51, 56) extending from one of the first operating lever (2) and the second operating lever (5) is linked to one end of the connecting member (16). 56) is further extended from one end of the shaft (16), and connected to one of the operating portions (1, 3) of the working clutch (1) and the traveling clutch (3). The other end is linked to the switching valve (10) Interchange mechanism (13a, 19b) which are rotatably supported, the melting communication mechanism (13a, 19b),
The shaft (16) and a connecting member (51, 56) extending from one of the first operating lever (2) and the second operating lever (5) are linked in a predetermined flexible relationship, The connection member (51, 56) is further connected to one of the operation sections of the working clutch (1) and the traveling clutch (3).

[0007]

According to the above construction, the walking type mobile agricultural machine for paddy fields (P) is operated by the first operating lever (2) and the work clutch (1).
Is operated, and the traveling clutch (3) is operated by the second operation lever (5). Then, the body height detecting mechanism (11,
The switching valve (10) is switched by 12), the hydraulic actuator (9) is expanded and contracted, and the rocking member (6) is rocked, and the paddy wheel (7) provided on the rocking member (6).
, The height of the body (35) is automatically controlled. At this time, if the first operation lever (2) is operated within a predetermined flexibility, the work clutch (1) is disconnected and connected via the connecting member (51), and the work is performed. When (5) is operated within the predetermined flexibility, the traveling clutch (3) is disconnected and connected via the connecting member (56), and the body (35) travels. Further, a connecting member (51) extending either one of the first operating lever (2) and the second operating lever (5) is linked by a shaft (16), and the other end of the shaft (16). To the accommodating mechanism (13a) supported by the shaft (16), and the other of the first operating lever (2) and the second operating lever (5) (5) is connected to the accommodating mechanism (19b). ), When the first operation lever (2) is operated beyond a predetermined flexibility, the switching valve (10) is switched via the rod (61) connected to the flexibility mechanism (13a) and the operation arm (10a). Switching, raising the aircraft (35), stopping the work at the same time,
When the second operation lever (5) is operated in a predetermined accommodation relation or more, the rod (61) connected to the accommodation mechanism (19b),
The switching valve (10) is switched via the operation arm (10a) to lower the body (35) and stop traveling at the same time.

[0008]

[Effects of the Invention] As described above, according to the present invention,
The work clutch operating lever (2) and the travel clutch lever (5) can operate the work clutch (1) and the travel clutch (3), respectively, and can also raise and lower the body (35). ), It is possible to reduce a single lever, a rod and the like for operating the switching valve (10) of the hydraulic actuator (9) for raising and lowering the hydraulic actuator.
Further, since the shaft (16) extending through the transmission case (32) and extending in the lateral direction of the fuselage is provided, the work clutch system connecting member (51) and the traveling clutch system connecting means (56) are provided on the left and right sides of the body (35). Since it is possible to distribute and avoid the bent arrangement, the connecting members (51, 56) can be constituted with a rod or the like in a well-balanced manner, and the operability of the operation levers (2, 5) can be improved. Further, since the operation can be performed by the two connecting means (51, 56) from the operation levers (2, 5), the structure can be simplified and the number of members can be reduced. That is, the operability of the operation levers (2, 5) can be improved, and the manufacturing cost can be reduced.

The reference numerals in parentheses refer to the drawings, and do not limit the configuration of the present invention.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 2 and 3, the walking rice transplanter P has a body 35 composed of an engine 31, a transmission case 32, a frame 33, and the like. A handle 36 is provided behind the body 35. The seedling rest 37 is slidably supported in the left-right direction while being extended, and a planting rod 38 is disposed at a lower end portion of the seedling rest 37. Further, below the frame 33, the rear swing fulcrum 11
A float 11 is suspended so as to be swingable around a,
The float 11 constitutes a body height detecting mechanism for detecting the body height by sensing the earth pressure on the rice field surface. An output shaft 39 protrudes from the left and right sides of the transmission case 32, and furthermore, chain cases 6, 6 are supported so as to be able to swing up and down around the output shaft 39. Paddy wheels 7, 7 are supported at the tip of 6.

Then, as shown in detail in FIG.
Bracket 4 fixed to engine 31 in front of
1 and a bumper member 42 fixed to the transmission case 32
A hydraulic cylinder 9 for adjusting the height of the machine is disposed between them. The hydraulic cylinder 9 is of a movable cylinder type, and its rod 9a is fixed to the bracket 41 and the bumper member 42, respectively, and the cylinder 9b is reciprocated up and down by being guided by the rod 9a. Further, a balance arm 43 is pivotally connected to the cylinder 9b around a pin 43a so that the balance arm 43 can swing left and right. Both ends of the balance arm 43 are pivoted through rods 45 and 45, respectively.
6 are connected to arms 40a, 40a fixed to the base end. A horizontal control hydraulic cylinder 46 is interposed between the intermediate portion of the balance arm 43 and the cylinder 9b. The cylinder 46 is controlled based on an inclination sensor 47, and moves the balance arm 43 right and left. The left and right paddy wheels 7, 7 are adjusted upside down reciprocally.

Two operating levers, a working (planting) clutch lever 2 and a traveling clutch lever 5, are arranged on a guide plate 50 (see FIG. 3) provided on the handle 36.

As shown in FIG. 1, the planting clutch lever 2 has an operating rod 51 connected thereto. The rod 51 has a collar 52 at its distal end and a collar 5 at its intermediate portion.
3 is fixed. The planting clutch arm 1 is connected to the distal end collar 52 via a compression spring 54, and the planting clutch is turned on and off according to the on or off position of the planting clutch lever 2. On the other hand, a shaft 16 is rotatably supported by the transmission case 32, and the rod 51 penetrates a hole 15 a of the arm 15 fixed to one end of the shaft 16, and the intermediate part collar 5
The shaft 16 can be rotated by the operation of the planting clutch lever 2 in the disengaging direction after the planting clutch lever 2 is brought into contact with the shaft 3. Also,
Another arm 17 is fixed to the other end of the shaft 16, and a pin 17a is implanted on the arm 17 so as to protrude inward.

Further, the connecting plate 5 is provided on the shaft 16.
5, the first plate 13, the second plate 19, and the sensing rod 12 are rotatably supported. On the other hand, the operating rod 5 connected to the traveling clutch lever 5
6 is a connecting plate 55 through a compression spring 57.
The plate 55 is connected to the traveling clutch arm 3 via a rod 59, and the traveling clutch is engaged / disengaged by operating the traveling clutch lever 5 to the on position or the off position. Further, a long hole 13a is formed in the first plate 13, and a pin 17a of the arm 17 is inserted into the long hole 13a to form a predetermined play mechanism. The first plate 13 is connected to the operating arm 1 of the hydraulic switching valve 10 via the plate 60 and the rod 61.
0a. The switching valve 10 communicates with the hydraulic cylinder 9 and is switched between an up position, a down position, and a neutral position according to the turning position of the operation arm 10a. Further, a return spring 14 is stretched on the operation arm 10a, and the spring 14 urges the switching valve 10 in a lower position direction.

The second plate 19 has a slot 19b,
A first lug 19a protruding to one side, a second lug 19c protruding in the opposite direction, and a spring hook 19
d. The first lug 19a can abut on the side surface 13b of the first plate 13, and the second plate 1
From 9 to the first plate 13, the switching valve 10 can be interlocked with the upward direction of the switching valve 10, and the rotation of the first plate 13 in the upward direction is permitted regardless of the position of the second plate 19. Further, the second lug 19c is in contact with the bottom side 12a of the sensing rod 12, and a spring 21 is stretched between the hooking portion 19d and the bent portion of the sensing rod 12, so that the second plate 19 The sensing rod 12 is interlocked with the sensing rod 12 via a spring 21 or by contact. A rod 5 extending from the traveling clutch lever 5
The rod 20 extends from the plate 62 fixed in the middle of the rod 6, and the rod tip 20a is inserted into the elongated hole 19b to form a predetermined play mechanism, and the rod 20 can move in the front-rear direction. The rod 56 and the rod 20 are configured not to bend.

A connecting plate 22 having a hat-shaped cross section is fixed to the front upper surface of the float 11, and the sensing rod 12 is inserted into a hollow portion 22a of the plate 22.
Is inserted. Thereby, the vertical movement of the float 11 causes the sensing rod 12 to move the shaft 1
The rotation is transmitted in six turns, and the sensing rod 12 is vertically rotatable and rotatably supported by the shaft 16 by the relatively long boss portion 12c, so that the float 11 is prevented from swinging in the horizontal direction.

Next, the operation of this embodiment based on the above configuration will be described.

In order to carry out planting work with the walking rice transplanter P,
By operating the traveling clutch lever 5 to the on position, the traveling clutch arm 3 puts the clutch into a connected state,
By operating the planting clutch lever 2 to the ON position, the clutch is connected by the planting clutch arm 1. Thus, the rice transplanter P travels while the paddy wheel 7 is driven, and the planting rod 38 rotates to perform the planting operation. At this time, the pin tip 20 linked to the traveling clutch lever 5
a is located in the middle of the long hole 19b of the second plate 19 and is connected to the planting clutch lever 2 via the rod 51, the arm 15 and the shaft 16.
The seventh pin 17a is located in the middle of the long hole 13a of the first plate 13. In this state, the first lug 19a abuts on the side surface 13b and the first plate 13 and the second plate 19 rotate integrally with each other based on the urging force from the return spring 14 of the switching valve 10. And these plates 1 are held by pins 17a and 20a.
The rotation of the floats 3 and 19 is not restricted, so that the vertical movement based on the earth pressure sensing of the float 11 is transmitted to the sensing rod 12 as a swing movement, and the second lug 1
9c or the second plate 19 via the spring 21
Plate 1 which is transmitted to and rotates together
3, transmitted to the operation arm 10a of the switching valve 10 via the plate 60 and the rod 61. Thereby, the switching valve 10 is switched to the raising position, the lowering position and the neutral position so that the body 35 is at a constant height with respect to the rice field based on the sensing of the earth pressure of the float 11, and the hydraulic cylinder 9 is operated. The height of the body is automatically controlled by moving the paddy wheels 7, 7 up and down.

Even if one or both of the traveling clutch lever 5 and the planting clutch lever 2 is operated to the off position, the pins 17, 20a are located in the middle of the slots 13a, 19b and the plates 13, 19 are located. As described above, the switching valve 10 is automatically controlled based on the up and down movement of the float 11 as described above.

Then, when the rice transplanter P reaches the headland and turns, the planting clutch lever 2 is operated to the fixed position while the traveling clutch lever 5 is held at the ON position. Then, the planting clutch arm 1 disengages the clutch to stop the rotation of the planting rod 38 (see FIG. 3), and at the same time, inserts the pin 17a of the plate 17 through the rod 51, the collar 53, the plate 15 and the shaft 16 into the elongated hole. Abuts on the upper end of 13a. In this position, the rotation of the first plate 13 in the lowering direction is prevented, and the switching valve 10 does not move to the lowering position, but enters a semi-automatic raising state in which only the raising direction is allowed. In this state, the operator sets the handle 36
Is lifted upward, the distance between the front part of the float 11 and the body 35 becomes narrower, and the sensing rod 12 is rotated clockwise, via the spring 21, the second plate 19 and the first lug 19a. Then, the first plate 13 is rotated in the same direction, and the switching valve 10 is switched to the raised position. As a result, the hydraulic cylinder 9 moves down the wheels 7, 7 and moves up the body 35. When the machine body 35 rises by a desired amount, the handle 36 is lowered to bring the rice transplanter P to a horizontal state. At this time, the first plate 13 is controlled by the pins 17a and turned downward (counterclockwise). Has been blocked,
The switching valve 10 is held at the neutral position, and the fuselage 35 is fixed at the raised position. At this time, the front part of the float 11 hangs down, the sensing rod 12 rotates counterclockwise, and the second lug 19c contacts the second plate 19.
Also rotate in the same direction, but the first lug 19a and the side surface 13b
The first plate 13 is not affected at all just by separating from the contact.

Further, when supplying seedlings to the seedling holder 37 of the rice transplanter P, the planting clutch lever 2 is set to the on or off position, and the traveling clutch lever 5 is operated to the lower position. Then, while the traveling clutch 3 is disconnected,
The rod tip 20a contacts the rear end of the slot 19b,
The rotation of the plate 19 in the raising (clockwise) direction is restricted. In this position, the float 11 moves the sensing rod 12
The second plate 19 is restricted from rotating at the rod tip 20a even if the rotation is given in the upward (clockwise) direction, so that the switching valve 10 is in the raised position via the first plate 13. No, but in a semi-automatic state where only the lowering direction is allowed. In this state, the fuselage 35 is at the lowered position where the predetermined earth pressure acts on the float 11, and is held in the lowered state even if the handle 36 is lifted to raise the fuselage.

In order to stop the height control of the rice transplanter P and fix the machine body 35 for transportation or storage, the traveling clutch lever 5 is operated to the lower position and the planting clutch lever 2 is moved to the fixing position. To operate. In this state, the traveling clutch 3 and the planting clutch 1 are both in the disconnected state, and the pin 17a contacts the lower end of the long hole 13a of the first plate 13 to lower the plate (counterclockwise).
Direction and the rod tip 20a
Abuts on the rear end of the long hole 19b of the plate 19 to restrict the upward (clockwise) rotation of the plate. Accordingly, the switching valve 10 is fixed at the neutral position, and the body 35 is maintained at the predetermined height regardless of the movement of the float 11.

Regardless of the operating position of the traveling clutch lever 5, that is, even if it is in the on position and in the traveling state,
When the planting clutch lever 2 is operated to the raised position even in the lowered position and the machine body is in the lowered state, the plate 17 is rotated in the clockwise direction via the rod 51, the collar 53, the plate 15 and the shaft 16. And the pin 17a
Abuts on the end of the elongated hole 13a to rotate the first plate 13 in the upward direction, and moves the operation arm 10a of the switching valve 10 to the upward position against the return spring 14. As a result, the hydraulic cylinder 9 swings the chain case 40 to lower the paddy wheels 7, 7 and raise the body 35. At this time, the float 11 hangs down and relatively rotates the second plate 19 counterclockwise via the sensing rod 12, but only the first lug 19a separates from the side surface 13b, and the first plate 13 And does not hinder the movement in the up direction of the vehicle.
Similarly, even if the movement of the plate 19 in the upward direction is restricted, the movement of the first plate 13 is not hindered by merely separating the first lug 19a from the side surface 13b.

Therefore, according to the present embodiment, when the planting clutch lever 2 is operated to the raised position, the body 35 is preferentially operated.
Can be quickly raised even in an emergency, and at this time, the planting clutch lever 5 only needs to be operated against the return spring 14, and can be operated lightly to improve the steering feeling. .

Further, since the first plate 13 and the second plate 19 are separated, the operation system from the planting clutch lever 2 and the operation system from the traveling clutch lever 5 can be independently adjusted. Is easy.

Further, operating rods 51 and 56 from the planting clutch lever 2 and the traveling clutch lever 5, respectively.
Since the connecting portions 15 (plate) and 19 (second plate) and the respective clutch levers 1 (planting clutch arm) and 55 (connecting plate) for elevating and lowering the airframe are arranged above,
The number of operation continuous pulling members such as wires is small, the structure is simplified, the cost can be reduced, and the maintainability and appearance can be improved.

The above embodiment has been described with reference to the walking rice transplanter. However, the present invention is not limited to this and can be similarly applied to other paddy working machines such as paddy submerged direct sowing machines.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an operating device for elevating a body according to the present invention.

FIG. 2 is a perspective view showing a front part of a walking rice transplanter to which the present invention can be applied.

FIG. 3 is a side view showing the entire walking type rice transplanter.

[Explanation of symbols]

 Reference Signs List 1 work clutch (planting clutch arm) 2 first operating lever (planting clutch lever) 3 traveling clutch (traveling clutch arm) 5 second operating lever (traveling clutch lever) 6 swing member (chain case) 7 paddy field Wheel 9 Hydraulic actuator (hydraulic cylinder) 10 Switching valve 10a Operation arm 11 Body height detecting mechanism (float) 12 Body height detecting mechanism (sensing rod) 13a Flexible mechanism (long hole) 16 Shaft 19b Flexible mechanism (long hole) 32 Mission case 35 Airframe (traveling aircraft) 51 Work equipment clutch system connecting member (rod) 56 Traveling clutch system connecting member (rod) 61 Rod P Walking-type mobile agricultural machine for paddy fields (walking rice transplanter)

Claims (1)

(57) [Scope of request for utility model registration] A paddle wheel is provided on a swinging member which is provided with a first operating lever connected to a work clutch and a second operating lever connected to a traveling clutch, and is swingably supported by an airframe. The swing member is connected to a hydraulic actuator, and a switching valve communicating with the hydraulic actuator is connected to a body height detecting mechanism so that the switching valve can be switched to automatically control the body height. In the walking-type mobile agricultural machine for paddy field constructed as described above, a shaft extending through the transmission case and extending in the lateral direction of the machine is provided, and one of the first operation lever and the second operation lever is provided at one end of the shaft. The connecting member extending from one side is linked, and the connecting member is further extended from one end of the shaft and connected to one of the operating portions of the working clutch and the traveling clutch. Said A switching mechanism interlocked with a switching valve is rotatably supported, and the switching mechanism is provided with the shaft and a connecting member extending from one of the first operating lever and the second operating lever. An operating device for a walking-type mobile agricultural machine for paddy fields, which is linked in a flexible relationship, and further connected from the connecting member to one of the operating portions of the working clutch and the traveling clutch.