JPH0246460Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a steering lock device for a vegetable transplanter.

(Prior art) The steering operation device for conventional vegetable transplanters has a steering pedal on the step that the operator can operate with his/her feet while sitting in the seat. I am now able to move forward.

(Problems to be solved by the invention) The above-described steering operation device has the following drawbacks.

In other words, when planting between furrows, if the furrows are generally straight, the operator may become distracted by the planting work and unconsciously press the steering pedal, causing the center of the machine to deviate from the center of the furrow, resulting in the seedlings not being planted in the center of the furrow. Sometimes.

(Means for Solving the Problem) Therefore, the technical problem of the present invention is to provide a vegetable transplanter that can always plant seedlings in the center of the furrow during planting work in the furrow.

The technical means of the present invention to solve this technical problem is that a horizontal tube equipped with a steering wheel is provided on a swing pin so as to be able to swing up and down, and the swing pin can be moved left and right on a center pin installed in the frame. The swing pin is configured so that it can be moved left and right about the center pin by depression of a steering pedal, and the swing pin is provided with a groove or hole, and a lock member that can be freely engaged and detached from the swing pin, and a lock member for the lock member. This is a steering lock device for a vegetable transplanter, in which a stopper pin that maintains a state separated from a groove or hole is provided on a steering lock bracket of a frame.

(Example) The embodiments shown in the drawings will be described below.

First, the whole vegetable transplanting machine shown in Fig. 11 will be explained by taking as an example one equipped with a chain holder type transplanting part.There is an engine 3 and a handle 2 at the rear of the frame 1, and the power from the engine is transmitted through a transmission mechanism. The rear wheels 4, 4 are then driven.

Reference numeral 5 denotes a speed change lever disposed on the side of the seat 6, which operates a fork of a speed change gear mechanism (not shown).

In front of the seat 6 is a chain holder type transplanting device 9, which is equipped with a seedling holder plate that can be opened and closed.

Reference numeral 10 denotes a soil covering ring, which is provided approximately at the center of the frame, and serves as a ground PTO to drive a chain holder type transplanting device via a mechanism to be described later.

This soil covering wheel 10 is arranged in a V-shape when viewed from the front.

In front of the soil-covering ring 10, there is a pair of left and right groove-making disks 1 that can be arranged in a V-shape facing rearward in plan view.
1, and near this groove-forming disk 11 there are front wheels 12, 12 as steering wheels.

As described above, the transplanter has front and rear wheels 12, 12, 4,
4, and the machine moves forward by driving the rear wheels 4 and 4. As the machine moves forward, the soil-covering ring 10 rotates due to contact with the ground, actuating the holder chain type transplanting part 9, and moving the groove-cutting disk. After digging a trench in step 11, the seedlings are planted, and the transplant is completed by tamping down the soil with a covering wheel 10.

Note that 8 is an auxiliary seedling stand, 13 is a rear wheel swing adjustment handle, and 14 is a balance weight.

The conventional steering device for a vegetable transplanter as described above is shown in FIGS.
There are 5.

A center pin 17 is installed near a protection plate 16 attached to the front end of the frame 1, and a swing pin 19 is provided in an upright rotation tube 18 fitted to the center pin 17 in a direction perpendicular to the center pin 17. swing pin 1
9 is also fitted with a rotating cylinder 20.

A horizontal tube 21 is further attached to the rotating tube 20 in the horizontal direction.

There is a support fitting 22 with a U-shaped cross section at the end of the middle tube fitted into the horizontal tube 21, and a support tube 23 is inserted through this so as to be vertically adjustable. A frame 24 is attached to this support frame 24.
A front wheel 12 as a steering wheel is attached to the front wheel.
Further, the tip of a link rod 26 is pivotally supported 27 on an operation rod 25 that protrudes downward at the left and right ends of the horizontal thread tube 21, and the base end of the link rod 26 is pivoted to an upper end metal fitting 29 on the back side of a steering petal 28. It has been supported by 30 years.

And the lower end pin 3 of the steering pedal 28
1 is fitted into holes in a pair of left and right metal fittings 32 on the bottom surface of the step 15, and is supported.

33 is a collar that fits into the pin 31. or,
A spring 34 is wound around one side of the pin 31.
The spring petal 28 is always energized to return to the neutral position.

Now, when you step on the steering pedal 28,
The petal 28 is tilted downward around the pin 31, and the horizontal kneading tube 21 is operated by the operating rod 25 via the link 26.
moves left and right about the center pin 17 in plan view.

Therefore, the steering direction is the steering pedal 2.
It changes depending on whether you press the button 8 or not. Yokorotsutsu 2
1 also moves up and down in side view around the swing pin 19, so the wheels move up and down in response to the height of the field.

The present invention relates to an improvement of the above-mentioned steering operation device, and a first embodiment is shown in FIGS. 1 and 2.

The illustrated support fitting 22 has a cylindrical shape, and the support rod 35 of the groove-making desk is slidably inserted into the bearing cylinder 36 of the protection plate 16 and tightened with a bolt/nut 38 operated by a handle 37.

A U-shaped steer lock bracket 39 is attached to the rear end of the bearing tube 36, and a pin 41 is attached to this.
is pivotally supported, and a lock lever 40 is fitted onto the pin 41 along with collars 42 and 42. The lock lever 40 can be freely engaged with and disengaged from the vertical groove 19a of the swing pin 19, and FIGS. 1 and 2 show the engaged state.

When the lock lever 40 is rotated upward from the engaged state shown in FIGS. 1 and 2, the stopper 40
3 allows you to catch yourself without falling forward. Therefore, during normal steering operation, the lock lever 40 is rotated upward until it hits the stopper 43, and when the steering is to be locked, the lock lever 40 is rotated downward to engage the vertical groove 19a of the swing pin 19. If you leave it there, you can go straight.

3 and 4 show a second embodiment different from those in FIGS. 1 and 2, in which a stopper pin 43 can be freely fitted into and removed from a steer lock bracket 39, and a lock lever 40
is pivoted by a pin 41 like the one in Figures 1 and 2, but the thickness of the base is smaller than that of the steer lock bracket 3.
9, so there is no collar 42 as shown in FIGS. 1 and 2. Vertical groove 19a
Only the part that fits into the groove is wide.

The rest of the structure is the same as that of FIGS. 1 and 2, and the same parts are given the same reference numerals.

As shown in Figures 3 and 4, the lock lever 40 is
To return to the normal swing state from the locked position where the pin 43 is engaged, remove the pin 43 and rotate the lock lever 40 upwards, then fit the pin 43 back into the steer lock bracket 39 and place the lock lever 40 on top of this. is shown as the imaginary line in Figure 4.

5 and 6 show a third embodiment, in which a protection plate 16
An arm 44 projects from the shaft, and a lock cylinder 45 corresponding to a steer lock bracket is fixed to this arm 44.

A lock pin 46 is fitted into the lock cylinder 45 so as to be movable up and down, and a spring 47 is interposed between the collar 66 and the lock cylinder 45. 48 is a guide pin suspended horizontally on the lock cylinder 45; the lock pin 46
It fits into the slit groove 49 of.

Further, a stopper pin 50 is provided on the lock pin 46 and can be freely inserted into and removed from the guide pin 48 in a direction perpendicular to the guide pin 48.
is provided.

This stopper pin 50 is locked to the lower end of the lock cylinder 45 in the state shown in FIG.
6 can be engaged with the hole 67 of the swing pin 19 to lock the swing pin 19.

When the stopper pin 50 is removed, the lock pin 4
6 is raised by the spring 47 and swings into the swing pin 19.
The lock is released from the hole 67. When the lock pin 46 rises, the slit groove 49 and the pin 48 are engaged with each other and the pin 48 is stopped at the position shown by the imaginary line in FIG.

Therefore, the pin 48 also serves as a kind of stopper pin.

The fourth embodiment shown in FIGS. 7 to 10 is one in which the front wheel steering is not locked only in the straight direction, but can be locked even when the steering is turned to a certain degree.

Generally, depending on the slope of the field, simply locking the front wheels in the straight direction may result in the front wheels being pulled to one side due to the influence of the groove coulter, but this is improved in the fourth embodiment.

That is, the steer lock bracket 39 shown in FIGS. 1 and 2 is rotatably supported on the stay 67 of the protection plate 16 by a lock angle adjustment support shaft 68.

The stay 67 has a steering lock angle adjustment screw 69 that rotates the steering lock bracket 39 using its bent portion.

The screw 69 is screwed into the stay 67 and the screwed position is fixed with a nut 70, and the screw 69 is inserted into the slit hole 71 of the bracket 39 so that the screw 69
The shaft tube 73 at the tip is rotatably fitted onto a pin 72 of the bracket 39.

The stay 67 also has an arc-shaped slit hole 74 into which the support shaft 68 can slide.

Therefore, when the screw 69 is screwed in from the state shown in FIG. 9 to the state shown in FIG. The direction is adjusted and fixed.

Therefore, even in conditions where the vehicle body tends to be pulled to one side, such as on a slope or at the adjustment position of the trench coulter, it is possible to drive along the ridge by adjusting the steering lock, allowing the operator to concentrate on planting work without worrying about steering, increasing efficiency. improves.

In any case, the steering lock bracket is provided with a locking member, which can be locked to the swing pin, so that straight-line steering is possible.

(Effects of the invention) According to this technical means, it is possible to lock the steering pin with the locking member, and therefore planting can be carried out in straight ridges without worrying about steering operation. Moreover, if you release the lock, you can not only perform normal steering operations but also swing normally, so you can drive stably even on uneven road surfaces.

Therefore, the steering lock device of the present invention can lock the steering simply by locking the locking member of the steering bracket on the side of the machine in the locking groove or hole of the center pin, and in the unlocked position, the locking member can be locked with the stopper pin. Since it can be held, it can be maintained in a non-locked state, and its operation and structure are simple, and the steering lock device is suitable for a vegetable transplanter.

[Brief explanation of the drawing]

Figures 1 and 2 are front and side views of the first embodiment of the device, Figures 3 and 4 are front and side views of the second embodiment of the device, and Figures 5 and 6 are the device of the invention. 7 is a front view of the fourth embodiment of the present device, FIG. 8 is a partially cutaway front view of the same, FIG. 9 is a plan view of the same, and FIG. 11 is an overall view of the vegetable transplanter, and FIGS. 12 and 13 are a side view and a plan view showing the steering operating device. 12...Front wheel, 17...Center pin, 19...
...Swing pin, 39...Steering lock bracket, 40...Lock lever, 43...Stopper pin, 45...Lock cylinder, 46...Lock pin,
50...stopper pin.

Claims (1)

[Scope of utility model registration request] A horizontal tube equipped with a steering wheel is attached to a swing pin so as to be able to swing up and down, and the swing pin is attached to a center pin set on the frame so as to be able to move left and right. The swing pin is configured to move left and right around the swing pin, and the swing pin is provided with a groove or a hole, and a lock member that can be freely engaged with and detached from the swing pin, and a stopper pin that maintains a state separated from the lock groove or hole of the lock member, A steering lock device for a vegetable transplanter that is installed on the steering lock bracket of the frame.