JPH0350644Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a buffer device for a marker in a rice field working machine such as a rice transplanter or a soil seeding machine for flooded paddy fields.

[Problems to be solved by the prior art and the invention] In general, the markers provided on this kind of field work machine are laid down so as to protrude to either the left or right side of the machine body, and are designed to mark the next work process with a line. It's getting old. Some of these markers are permanently attached to the standing position side via the raising mechanism so that when the work clutch is released to complete the work, the markers are automatically raised and stored inside the work machine. There are some that are designed to make it stronger. However, conventionally, the marker has a structure that changes to the standing position simply by the biasing force of the standing action ammunition, so when the marker automatically stands up and stops in the standing position, the standing speed is slowed down midway. Since the machine suddenly stops due to lack of contact and collision with the stopper, mud adhering to the tip of the marker gains inertia and scatters forcefully towards the inside of the machine, often hitting the operator. Unfortunately, there is a problem in that a loud impact noise is generated when the vehicle stops in an upright position.

Therefore, as shown in Japanese Utility Model Application No. 57-173511,
It is proposed to provide a speed-reducing bullet for reducing the automatic raising speed in opposition to the raising-actuating bullet. However, this method requires a special bullet for speed reduction, which inevitably increases the number of parts and makes assembly cumbersome and complicated.

[Means for solving the problem] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a buffer device for a marker in a field work machine that can eliminate these drawbacks. The base ends of the left and right markers are pivotably supported on brackets provided on both the left and right sides of the machine, and between the markers and the brackets, the base ends of the left and right markers are mounted on brackets provided on the left and right sides of the work machine. The marker is configured to be able to stand up automatically by intervening a lifting actuator that biases the marker, and the marker is connected via a connecting rod to a marker operating lever provided on the work equipment side, so that the marker can be raised automatically. In a field work machine configured to be manually operable by an operating lever, a deceleration means for reducing the automatic raising speed during the process in which the marker automatically stands up in response to the biasing force of the raising operation bullet; It consists of a protrusion provided at the base end of the marker and a deceleration cam part provided on the bracket so that the protrusion comes into sliding contact during the marker's upright process and the sliding resistance reduces the automatic upright speed. This is a characteristic feature.

With this configuration, the present invention is capable of decelerating the automatic standing speed of the marker without using a bullet exclusively for deceleration.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawing, 1 is a walk-behind rice transplanter, and the rice transplanter 1 is equipped with an engine 2, swing wheels 3, a seedling stand 4, a handle 5, a planting claw 6, a float body 7, a body frame 8, etc. The structure is the same as before. Here, the swing wheel 3 is formed by fitting a pneumatic rubber tire 3e with lugs 3d onto the outer periphery of a rim 3c provided at the tips of spokes 3b extending radially from a boss portion 3a. This makes it possible to improve drivability both in the field and on the road.

Reference numeral 9 denotes a guide body provided on the body frame 8 side to guide the intermittent left and right reciprocating movement of the seedling platform 4, and brackets 10 are integrally provided at both left and right ends of the guide body 9. However, the base end portion of the marker 12 is further pivotably supported on the bracket 10 via a support shaft 11. and marker 1
2 protrudes to the side of the machine body and falls down due to the biasing force of the bullet 13 for upright action interposed between the pin shaft 13a on the marker 12 side and the bracket 10, and the tip 12a is placed in the next planting row. It is constantly energized so that it automatically changes from the lying down position where it makes a delineation mark to the upright position where it is stored upright inside the work machine. Further, the other end of the connecting rod 14 whose tip is pivoted to the middle part of the marker 12 is connected to the middle part of an operating lever 15 attached to the handle 5, so that the operating lever 15 can be operated in the direction of arrow A. As a result, the marker 12 can change its shape from a standing position to a lying down position against the standing action ammunition 13. And Marker 1 transformed into a prone position
2 is held in this laid-down position by a locking hook 16 pivotally supported on the bracket 10 engaging with a pin shaft 13a supporting the upright action bomb 13. .

On the other hand, the locking hook 16 is connected to a work clutch lever 1 that connects and disconnects a work clutch (not shown) of the planting section.
7 via a bullet 18 and an inner wire 19, and by operating the working clutch lever 17 to the disengaged side, the inner wire 19 is pulled and the locking hook 16 is disengaged from the pin shaft 13. As a result, the marker 12 is automatically erected to the erected position by the biasing force of the erecting actuator 13, as described above.

Furthermore, a pin 12b protrudes from the base end of the marker 12 toward the bracket 10.
On the other hand, the pin 12 is provided on the outer peripheral surface of the bracket 10.
b forms a cam surface 10a which, in the process of raising the marker 12, slides more strongly as the marker 12 stands up to provide sliding resistance and reduce the automatic raising speed of the marker 12, thereby constituting the deceleration means of this embodiment. There is.

Further, the marker 12 is formed by bending a round bar body into a loop shape at the tip side and bringing the tip end into contact with the round bar body, and the tip portion 12a is shown in FIG. As shown, when viewed from the rear, it is immersed in the mud with an angle of θ, and even though it is simply formed by bending a round rod, it is wide and easy to see in the field. The mark is now delineated.

In the embodiment of the present invention configured as described above, when currently planting seedlings, in order to lower the marker 12 on either the left or right side and mark the line for the next planting row, it is necessary to operate the corresponding side. If the lever 15 is operated in the direction of the arrow A and the marker 12 is laid down against the upright action spring 13 until the pin shaft 13a engages with the locking hook 16, the marker 1
2 is held in this laid-down position, and therefore, if seedling planting work is carried out in this state, the next planting process will be marked with a line by the marker 12. When the planting operation in this planting stroke is finished and the next planting stroke is to be started, the work clutch lever 17 is operated to the cut side to stop the seedling planting operation and the machine is rotated. In conjunction with the disconnection operation of the work clutch lever 17, the inner wire 19 is pulled and the engagement of the locking hook 16 with the pin shaft 13a is released, and the marker 12 is erected by the biasing force of the erecting actuator 13. The posture will automatically change.

As described above, in the present invention, the marker 12 automatically changes to the standing position by disengaging the work clutch lever 17, but in this case,
In the present invention, during this automatic raising process, the pin 12b provided at the base end of the marker comes into sliding contact with the deceleration cam part 10a provided on the bracket 10, and the sliding resistance reduces the automatic raising speed of the marker 12. As a result, the posture movement is performed slowly.

That is, when the locking hook 16 is disengaged from the pin shaft 13a by operating the work clutch lever 12, the marker 1
As described above, the marker 2 attempts to automatically stand up due to the biasing force of the upright actuating ammunition 13, but in this automatic upright process, the pin 12b on the marker side comes into sliding contact with the cam surface 10a on the bracket side. This sliding resistance acts as a force that resists the erecting operation of the marker 12 due to the biasing force of the erecting action bullet 13, and as a result, the marker 12 stands up in a slowly decelerated state. Therefore, marker 12
Even if some mud is attached to the tip 13a of the holder, the attached mud will have a large inertial force, such as in the case of a conventional automatic stand-up that is suddenly stopped at the standing position without any deceleration during the automatic stand-up. This eliminates the possibility of the worker being hit by the object as it scatters toward the opposite side, and instead slowly changes into a standing position and stands still, eliminating the impact noise generated at this time. be able to.

Moreover, the means for decelerating the automatic standing speed of the marker 12 is such that a pin 12b protruding from the base end of the marker 12 is attached to the bracket 10 which pivotally supports the marker 12.
It is constructed by slidingly contacting the deceleration cam part 10a integrally formed with the cam, and therefore there is no need to separately provide a dedicated deceleration bullet to reduce the automatic rising speed as in the past. Natsute, Marker 1
The bracket 10 for pivotally supporting 2 can be effectively used as a member for configuring the deceleration means, and the number of parts can be reduced.
The structure will also be simplified.

[Operations and Effects] In summary, the present invention is constructed as described above, so when a marker that is lying down automatically stands up to an upright position under the urging force of the upright actuating projectile, the connecting rod and the marker The biasing force generated by the buffer means provided on the pivot portion connected to the operating lever acts in the opposite direction to the raising action trigger, thereby reducing the automatic raising speed. As a result, the marker slowly transforms into an upright position, and at this time, the mud adhering to the tip of the marker scatters due to the inertial force when the marker stops in the upright position, as in the past. Not only can this not only reliably prevent problems that would otherwise occur, but the impact upon stopping is also significantly reduced, allowing the vehicle to come to a gentle standstill.

Moreover, the means for reducing the automatic rising speed of the marker is constructed by a protrusion protruding from the base end of the marker slidingly contacting a deceleration cam portion integrally formed with a bracket that pivotally supports the marker. Therefore, it is no longer necessary to separately provide a dedicated deceleration bullet to decelerate the automatic raising speed as in the past, and the bracket for pivotally supporting the marker constitutes the deceleration means. It can be effectively used as a member for the purpose of the present invention, which not only reduces the number of parts but also simplifies the structure.

[Brief explanation of drawings]

The drawings show an embodiment of a buffer device for a marker in a field working machine according to the present invention,
The figure is an overall side view of the rice transplanter, Figure 2 is a rear view of the rice transplanter, Figure 3 is a rear view of the main parts, Figure 4 is an explanatory diagram of the operation of the main parts, and Figure 5 is a marker. A side view, a top view, and a back view of the tip part, and FIGS. 6X, Y, and Z are a side view, a partially cutaway front view, and an enlarged view of the main parts of the swing wheel, respectively. In the figure, 1 is a rice transplanter, 10 is a bracket, 10a
is the deceleration cam part, 12 is the marker, 12b is the pin, 1
Reference numeral 3 designates a lifting device, 14 a connecting rod, and 15 a control lever.

Claims (1)

[Scope of utility model registration request] The base ends of the left and right markers are pivoted to the brackets provided on both the left and right sides of the work machine so that they can be raised and lowered.
Moreover, between the marker and the bracket, there is interposed a erecting actuator that biases the marker toward the erected position side where the marker is stored inside the work machine, so that the marker can be automatically erected. and a marker operating lever provided on the working machine side are connected via a connecting rod, and the marker is configured to be manually operable by the marker operating lever, wherein the marker is a mower for upright operation. A protrusion is provided at the proximal end of the marker to reduce the speed of automatic standing up in the process of automatically standing up in response to the biasing force of the marker. 1. A buffer device for a marker in a field work machine, comprising a deceleration cam section provided on a bracket to reduce the automatic rising speed.