JPH0595229U - A ridge height detection device for a walking type agricultural work machine - Google Patents

Abstract

(57) [Summary] [Purpose] When the sensor body 35 for detecting the ridge height, which is arranged below the traveling vehicle body of the seedling transplanter, passes through a highly uneven portion of the ridge A and is pushed up to detect the ridge height. It prevents the transmission of the device 33 from being damaged. A roller-shaped sensor body 35 that abuts on the upper surface of a ridge is attached to the tip of a rotary lever 34 that pivotally supports a base end of a traveling vehicle body 1 so as to be vertically rotatable. A lower end of an elevating rod 45 which is vertically long and vertically is erected on a connecting bracket 44 pivotally supported by a rotating lever 34 so as to be rotatable only.
The bell crank lever 40 pivotally supported on the upper side of the upper support 46 is rotatably supported on the side surface of the bell crank lever 40. The lifting rod 45 has a U-shaped regulating body 48 in side view.
The upper and lower end pieces are slidably fitted, and the upper end piece is attached to the upper support 46.
Place it above. Adjustment nut 49 fixed to the bottom piece
The screw portion formed on the elevating rod 45 is screwed together. A compression coil spring 50, which is loosely fitted to the elevating rod 45, is inserted between the lower end piece of the regulation body 48 and the lower surface of the upper support body 46.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a ridge height detecting device in a walk-behind agricultural working machine for transplanting seedlings while traveling across ridges.

[0002]

[Problems to be solved by conventional techniques and devices]

 In this type of walk-behind agricultural working machine, it is necessary to adjust the depth of seedling planting on the upper surface of the ridge to be substantially constant, regardless of the vertical movement of the running surface of the field and the height of the ridge. Therefore, conventionally, a ridge height sensor that moves up and down with respect to the traveling vehicle body is provided. Further, this type of conventional ridge height sensor is provided with a spring for urging the ridge upper surface with a substantially constant pressing force toward the ridge upper surface, but when the ridge height varies greatly, for example, When the unevenness of the upper surface of the ridge is severe, the amount of flexural deformation of the spring is so small that the ridge height sensor cannot follow up and down smoothly, especially when the sensor is pushed up hard There was a problem that was damaged.

The present invention aims to solve this problem.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention mounts a wheel on a traveling vehicle body so that it can be moved up and down, and a pivoting lever having a base end pivotably pivoted up and down on the traveling vehicle body contacts an upper surface of a ridge. In a walk-behind agricultural work machine in which a sensor body for detecting the ridge height is mounted and the wheels are controlled to move up and down according to the vertical rotation of the rotating lever, a cushion is provided between the rotating lever and the traveling vehicle body. The spring means is inserted.

[0005]

【Example】

 Next, an example of a seedling transplanter embodying the present invention will be described. 1 is a side view of the seedling transplanter, FIG. 2 is a plan view, and FIG. 3 is a rear view. An engine 2 and a switching valve unit 3 for hydraulic control are mounted on the front part of the traveling vehicle body 1 of the transplanter, and a mission case 4 is fixed to the traveling vehicle body 1 at a substantially middle portion in the front and rear. The front wheels 5, 5 and the rear wheels 6, 6 arranged on both left and right sides of the traveling vehicle body 1 are mounted on the traveling vehicle body 1 via an elevating mechanism 7 described later.

On the upper side of the traveling vehicle body 1, a rotary pot 9 is arranged between a rearwardly protruding U-shaped handle 8 and a lower surface of the rotary pot 9 and an upper surface of the ridge A. A transplant opening device 11 is provided which moves up and down in a substantially elliptical locus through a planting link 10 between them, and the planting transmission case 12 raises and lowers the planting link 10 to rotate the rotary pot 9 horizontally, and The transplant opener 11 is configured to be opened and closed. The presser wheel 13 is for shaping the ridge A after transplanting the seedling pot N.

The transplant opening device 11 is a cylinder for receiving the seedling pot N dropped and supplied from the pot position at the rear end of the rotary pot 9, and a transplant hole is opened immediately when piercing the upper surface of the ridge A and immediately thereafter. At the timing of, the bucket is opened forward and backward to drop the seedling pot N into the transplant hole. Next, the lifting mechanism 7 will be described. The lifting mechanism 7 has a mechanism in which the wheels 5 and 6 on the left and right sides move up and down all at once, and the traveling vehicle body 1 moves down or up with respect to the ridge A, and when one of the left and right wheels moves up, It is provided with a so-called rolling mechanism in which the traveling vehicle 1 leans to the left or right in the traveling direction when the wheels descend.

Swing cases 15a and 15b each having a built-in transmission mechanism are rotatably attached to both ends of a drive shaft 14 projecting to the left and right from the mission case 4, and the rear wheels 6 are attached to the tips of the swing cases 15a and 15b. Is provided to drive the rotation. The front wheel 5 is attached to the front end of a connecting rod 16 extending forward from the swing cases 15a and 15b, while the connecting rod 16 is pivotally attached to a pipe-shaped front frame 17 of the traveling vehicle body 1 so as to be vertically rotatable. It is connected to the front support pipe 18 to reinforce it in a frame-like structure.

A rear end of the lifting hydraulic cylinder 19 is fixedly provided on the lower surface of the front portion of the traveling vehicle body 1, and the piston rod 20 extending in the forward direction from the lifting hydraulic cylinder 19 is provided with a middle portion on the left and right of the lifting pipe 21. The rolling shaft 23 is connected to the front part of the traveling vehicle to move back and forth along a guide groove 22 that is open to the front. The brackets 24 and 25 are fixed to each other in the upside-down direction, and are connected to the respective swing cases 15a and 15b via the elevating link mechanisms 26a and 26b. As a result, when the piston rod 20 in the lifting hydraulic cylinder 19 projects forward, the rolling shaft 23 is moved forward through the lifting pipe 21, so that the left and right lifting link mechanisms 26a and 26b are pulled simultaneously. Through this, the free end sides of the left and right swing cases 15a, 15b rotate downward, and the left and right wheels 5, 5, 6, 6 are simultaneously moved downward so that the traveling vehicle body 1 separates upward from the ridge A. To rise. On the contrary, when the piston rod 20 is retracted, the left and right wheels 5, 5, 6, 6 are simultaneously raised and rotated, and the traveling vehicle body 1 is moved downward so as to approach the upper surface of the ridge A.

With this elevating structure, the transplanting depth of the seedling pot N to the ridge A can be adjusted, and the seedlings can be transplanted to various ridges A having different heights. The rolling mechanism is as follows. That is, a piston rod 29 of a rolling hydraulic cylinder 28 having a base end rotatably mounted on a support base 27 that moves back and forth integrally with the elevating pipe 21 is attached to one side of the rolling shaft 23. When the piston rod 29 is connected to the bracket 30 and the piston rod 29 is projected, the rolling shaft 23 is rotated counterclockwise in FIG. 4, whereby the bracket 24 for the left wheels 5 and 6 is rotated upward and the left side is rotated. The elevating link mechanism 26a is pushed backward, and the free end side of the swing case 15a pivots upward through this, and the left wheels 5 and 6 ascend with respect to the traveling vehicle body 17. At this time, on the contrary, the bracket 25 for the right wheels 5, 6 is pivoted downward, and the right lifting link mechanism 26b is pulled forward, through which the free end side of the swing case 15b pivots downward, The wheels 5 and 6 of the vehicle are lowered with respect to the traveling vehicle body 17, so that the traveling vehicle body 1 rolls so that its left side faces downward.

When the traveling vehicle body 1 is caused to travel along the location where the longitudinal direction of the ridge A is formed along the slope of the mountain, the rolling mechanism is used to increase the height of the wheels closer to the mountain side relative to the traveling vehicle body. The height of the wheels closer to the valley side with respect to the traveling vehicle body is increased to control the posture so that the left and right sides of the traveling vehicle body are substantially horizontal, so that the seedling pot N can be transplanted substantially vertically to the upper surface of the ridge A. To do.

FIGS. 1 and 5 detect the height dimension between the lower surface of the traveling vehicle body 1 and the upper surface of the ridge A when adjusting the transplanting depth of the seedling pot N by the elevating mechanism 7 to a substantially constant state. The ridge height detection device 33 for this is shown. The ridge height detecting device 33 includes a rotating lever 34 having a base end pivotally supported on the traveling vehicle body 1 so as to be vertically rotatable, and a roller-shaped sensor body 35 rotatably attached to a free end of the rotating lever 34. And a cushioning spring means 36 interposed between the longitudinal midway portion of the rotating lever 34 and the traveling vehicle body 1 and a hydraulic switching rod 37 for the lifting hydraulic cylinder 19 in the switching valve unit 3. The operation link mechanism 38 for performing the operation is a main component.

The operation link mechanism 38 is attached to the front and rear long connecting rod 39 whose front end is rotatably connected to the switching rod 37 and the rear end of the connecting rod 39, and is rotatable around the support shaft 41. 5 includes a bell crank lever 40 pivotally attached to the handle bar and a vertically-long connecting rod 43 that connects the bell crank lever 40 to an elevating operation lever 42 arranged on the side of the handle 8 or the like. When the vehicle body 1 is rotated in the forward direction (arrow B direction), the traveling vehicle body 1 is at the maximum lowered position, and when it is rotated rearward (direction of the arrow C) in FIG. 5, the traveling vehicle body 1 is at the maximum raised position. ..

Further, the lower end of a vertically elevating rod 45 is rotatably attached to a connecting bracket 44 pivotally supported by the pivoting lever 34 so as to be rotatably mounted, and the bell crank lever 40 The upper portion of the elevating rod 45 is slidably fitted in a through hole 47 of a round shaft-shaped upper support member 46 pivotably supported on the side surface. Further, the bell crank lever 40 is provided with a torsion coil spring 60 which is loosely fitted to the support shaft 41 and biases the upper support member 46 in the downward direction.

The lifting rod 45 is slidably fitted with an upper end piece 48 a of a U-shaped side view restricting body 48, and the upper end piece 48 a is arranged above the upper support body 46. The female screw portion of the lower end piece 48b and the adjusting nut 49 are screwed into the screw portion formed on the elevating rod 45. Then, the coil spring 50 loosely fitted to the elevating rod 45 is inserted between the lower end piece 48 b of the regulation body 48 and the lower surface of the upper support body 46.

Then, by rotating the elevating rod 45 and adjusting the dimension of L at the position shown in FIG. 5 so as to be shortened, the seedling planting depth is increased and the dimension of L is increased. By adjusting, the seedling planting depth can be finely adjusted in advance so as to be shallow. Also, while the lower end of the lifting rod 45 is fixedly erected on the connecting bracket 44, an adjusting nut 49 is rotatably abutted on the lower end piece 48b of the restricting body 48 through which the lifting rod 45 is inserted so as to adjust. The length of the L may be adjusted by rotating the nut 49 with respect to the threaded portion of the elevating rod 45.

According to such a configuration, as described above, the depth of seedling planting is adjusted in advance, and the traveling vehicle body 1 is advanced along the ridge A with the wheels 5 and 6 straddling the left and right sides of the ridge A. If the seedling pot N is supplied to the location of the rotary pot 9 while rotating, the rotary pot 9 is rotated horizontally, and at a predetermined time interval, under the pot portion at one location (the rear end in the traveling direction) of the rotary pot 9. The lid is opened, and the seedling pot N is received by the transplant opening device 11 in the raised position, the planting link 10 is lowered, the transplant opening device 11 is opened, and the seedling pot N is transplanted on the upper surface of the ridge A.

When the traveling vehicle body 1 moves forward, the sensor body 35 rolls forward on the upper surface of the ridge A while being pressed by the torsion coil spring 60. Then, when the height (H1) of the ridge A gradually increases, the sensor body 35 rises via the turning lever 34, the lifting rod 45 is pushed up, and accordingly, the bell crank lever 40 turns via the coil spring 50. The movement is transmitted via the connecting rod 39 so as to rotate the switching rod 37, and the front and rear wheels 5, 6 on both the left and right sides are simultaneously lowered by switching the hydraulic pressure feed direction of the switching valve unit 3. When the vertical distance between the traveling vehicle body 1 and the upper surface of the ridge A reaches a predetermined height, the switching valve is returned to the neutral position and the height position is maintained. On the contrary, when the ridge height H1 is lowered, the front and rear wheels 5, 6 on both the left and right sides are simultaneously raised to bring the traveling vehicle body 1 closer to the ridge A, and control is performed so that the traveling vehicle body 1 can be maintained at a predetermined height.

When the upper surface of the ridge A is highly uneven, the sensor body 35 is violently pushed up during the forward movement of the traveling vehicle body 1. According to the spring means 36 of the present invention, the sensor body 35 is violently pushed up. Accordingly, the elevating rod 45 moves upward from the through hole 47 of the upper support 46, but the spring 50 contracts in length due to elastic strain, so that the bell crank lever 40 can be largely rotated. There is no need to apply excessive force to the switching valve unit 3.

Therefore, even if the sensor body 35 is pushed up excessively, an unreasonable force does not act on each transmission member and the switching valve unit 3 in the ridge height detecting device 33, and the ridge height detecting device 33 is damaged. To be safe. In addition, as shown in FIGS. 1 and 8, standard seedling stands 51, 51 for mounting a large number of the seedling pots N on the left and right sides of the traveling vehicle body 1 are provided on the support arms 52, 52 on the left and right sides. In order to attach and further attach the auxiliary seedling stand 53 detachably, the auxiliary seedling arm 54 is detachably attached to the support arm 52, and the auxiliary seedling support rod 55 is rotated left and right on the auxiliary seedling arm 54. It is possible and attaches detachably. The support arm 52 is supported by a support pipe 56 connected to the chassis, and the preliminary seedling stand arm 54 is connected to a reinforcement pipe 57 provided along the chassis side. Reference numeral 61 is a speed change lever projecting upward in front of the rotary pot 9, and the rotation speed of one speed change lever 61 can be used to change the traveling speed and change the planting plant interval of the seedling pot N. it can. That is, in the character-shaped guide groove having a width "width" in plan view in FIG. 2, when it is tilted to the front left / right center (closer to the front side of the traveling vehicle), the reverse position, the middle position of the left / right center is the neutral position, and The rear side is in the 1st speed, the last position is in the 2nd speed position, the right side is set to the range where the stock pitch is narrow, and the left side is set to the wide range.

The sensor body 35 in the present invention may have a roller shape or a sled shape. Further, the present invention can be applied not only to the seedling transplanting machine but also to the management machine.

[0022]

[Operation and effect of the device]

 As described above in detail, according to the present invention, the wheels are mounted on the traveling vehicle body so that the moving body can be adjusted up and down, and the base end of the traveling vehicle body is rotatably pivoted up and down. In a walking type agricultural working machine in which a sensor body for detecting the ridge height that is in contact with the ridge height is mounted, and the wheels are vertically adjusted according to the vertical rotation of the vertical rotation lever, the rotation lever and the traveling vehicle The spring means presses the sensor body along the upper surface of the ridge when the unevenness of the upper surface of the ridge is gentle, so that the ridge height can be accurately detected. You can On the other hand, when the unevenness of the upper surface of the ridge is severe, even if the sensor body is pushed up excessively, an unreasonable force cannot be applied to each transmission member in the ridge height detection device, and damage to the ridge height detection device is avoided. It has the effect of being safe.

[Brief description of drawings]

FIG. 1 is a side view of a transplanter.

FIG. 2 is a plan view of the transplanter.

FIG. 3 is a rear view of the transplanter.

FIG. 4 is a mechanism explanatory view of a lifting mechanism.

FIG. 5 is a side view of the ridge height detection device.

FIG. 6 is a side view of a main part of spring means.

7 is a VII-VII arrow view of FIG.

FIG. 8 is a perspective view of a preliminary seedling stand.

[Explanation of symbols]

 1 Traveling Vehicle 3 Switching Valve Unit 5, 5 Front Wheel 6, 6 Rear Wheel 7 Lifting Mechanism 15a, 15b Swing Case 19 Lifting Hydraulic Cylinder 26a, 26b Lifting Link Mechanism 33 Ridge Height Detecting Device 34 Rotating Lever 35 Sensor Body 36 Spring means 39 Connection rod 40 Bell crank lever 42 Elevation operation lever 43 Connection rod 44 Connection bracket 45 Elevation rod 46 Upper support 47 Through hole 48 Regulator 49 Adjustment nut 50 Coil spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshinori Yoshida 197 Kume, Okayama City, Okayama Prefecture Ishikawajima Shibaura Machinery Co., Ltd.Okayama Factory (72) Inventor, Yuji Ohara 197 Kume, Okayama City, Okayama Prefecture Ishikawajima Shibaura Machinery Co., Ltd. Okayama factory

Claims (1)

[Scope of utility model registration request] 1. A rotative lever for mounting a wheel on a traveling vehicle body so as to be adjustable in vertical movement and pivotally supporting a base end of the traveling vehicle body in a vertically rotatable manner, for detecting a ridge height for contacting an upper surface of the ridge. In a walk-behind agricultural working machine in which a sensor body is mounted and wheels are vertically adjusted in accordance with the vertical rotation of a rotating lever, a buffer spring means is interposed between the rotating lever and a traveling vehicle body. A ridge height detection device for a walk-behind agricultural work machine characterized by the above.