JPS6133042Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a ladder-type footboard for agricultural machinery in which left and right side frames are connected by wheel lug locking rods arranged at a predetermined interval in the longitudinal direction of the side frames. This invention relates to a storage structure for extension footboards.

The above-mentioned footboard can prevent the mud that has fallen from the wheels from falling from the space formed by the left and right side frames and the bars, and from being deposited in mud as in the case of footboards made of board materials. It has the advantage of being lighter than the footboards made of the board materials mentioned above, but in the past, the side frames were generally constructed in a straight line in the longitudinal direction, and when the agricultural machine was raised close to the ridge, the side frames of the footboards The side edges were lifted off the ground, and as a result, the footboards slipped from the ridges and fell, posing a risk of falling and damaging the agricultural machinery.

Also, when climbing onto a ridge, the lugs shift from the footboard to contact with the ridge, and although the wheels are located on the ridge side, the weight of the aircraft still remains on the side of the slanted footboard, causing the entire aircraft to fall into contact with the ridge. If there is a force acting on the falling side, or if the ridge top surface is asphalt-paved and hard, or conversely, if it is extremely soft, the lug may slip between it and the ridge top surface, causing the wheels to slip. There were times when the driving force did not generate enough force to pull the aircraft up to the ridge, making it impossible to climb up on its own.

In view of the above points, the present invention enables footboards to be stably erected across the ridge and the field, and also enables the aircraft to easily climb onto the ground on its own even when the top surface of the ridge is in poor condition. , the purpose is to enable the extension footboards to be stored well for this purpose.

In order to achieve the above object, the present invention provides a storage structure for an extension footboard in the above-mentioned ladder-type footboard for agricultural machinery, in which the side frame is placed on the upper surface of the ridge, and the side frame is connected to the upper side part of the ridge, and A first imaginary straight line that is bent in a letter shape in side view by a lower side part that is constructed diagonally across the area, and connects the ends of the upper side part and the lower side part on the opposite side to the bent side, respectively; a second imaginary straight line extending downward from the bent side end and perpendicular to the longitudinal direction of the upper side portion;
and in a state where most of the space is contained within a space surrounded by the lower side portion in side view,
The present invention is characterized in that a storage mounting portion is attached to the lower side portion to removably attach a ladder-type extension footboard that is removably attached to the upper side portion.

In other words, by bending the side frame, the tip side of the upper side part is placed on the ridge top surface, and the lower end of the lower side part is grounded on the field, so that both the upper and lower ends of the footboard are in good contact with the ground, and the footboard is placed on the ridge. It is now possible to construct the structure in a stable manner both in the field and in the field.

Furthermore, by appropriately connecting the extension footboard to the upper side, even when the upper surface of the ridge is likely to slip between the lugs, such as hard or extremely soft asphalt pavement, the extension footboard can be connected to the upper side. By locking the lugs to the bars of the footboards, the machine could be reliably pulled up to the ridge using the driving force of the wheels, making it possible to easily mount the machine on the ridge by itself.

Moreover, when the extension footboard is not in use,
Since it can be attached to the main ladder-type stepboard, the extension stepboard can be transported together with the main ladder-type stepboard without accidentally forgetting it, making it convenient for practical use. Since the extension footboard is inserted into the space surrounded by the straight line and the lower side, the first imaginary straight line is normally the mounting surface when loading and unloading the footboard onto a truck, etc. This allows you to reliably avoid the situation where the extension footboard protrudes locally and the protruding part collides with other objects such as the ground, causing damage, and also allows you to use the main footboard. Since the extension footboard is hardly inserted below the upper part that is placed on the ridge when doing so, even if the extension footboard is attached, the main footboard can be used across the ridge and the rice field without any problem. As a whole, it became possible to store the extension footboards very conveniently and effectively in practical terms.

Hereinafter, embodiments of the present invention will be described in detail with reference to illustrative drawings.

A ladder-type footboard 1, which is particularly useful for lifting a single-wheel riding rice transplanter A from a rice field to a ridge, is constructed by a pair of left and right side frames 2, 2 each made of a square pipe.
They are integrally connected by welding with rods 3 made of round pipes arranged at predetermined intervals in the longitudinal direction, and the extension step board 1a of the step board 1 is connected thereto.

The side frames 2, 2 are each bent into a letter shape when viewed from the side, with an upper side portion 4 placed on the upper surface of the ridge, and a lower side portion 5 connected to the upper side portion 4 and installed obliquely across the field, A tongue piece 6 for biting into the ground or engaging asphalt or the like is provided at each end.

As shown in FIGS. 4 and 5, the rods 3..., except for those at both ends, have their left and right center portions curved downward in a concave manner, and the wheels 7 of the rice transplanter A are Bar material 3 due to curved guide surfaces F, F...
It is configured so that it can be guided toward the center in the longitudinal direction and run onto the ridge without meandering.

In addition, the bar 3 attached to the tip of the upper side portion 4 has a
A plate body 8 of a predetermined length is provided at the center in the longitudinal direction to protrude downward, and is configured to prevent the lug 9 from being locked to the bar 3, and when the wheel 7 rides on the ridge. , is configured to prevent the footboard 1 from being lifted up while the lug 9, which was previously locked, is locked to the bar 3.

The pitch of the bar 3... is the lug 9... of the wheel 7.
For example, the length is set to be approximately equal to the length obtained by linearly connecting every second lug 9 to the bar 3. When the lug 9 is locked to the upper bar 3, a part of the tip of the lug 9 is locked to the upper bar 3, and using this as a reaction force point, the lug 9 on the rear side of the fuselage is attached to the bar 3. , and as the lug 9 on the front side of the fuselage is reliably engaged with the bar 3, the lug 9... is sequentially attached to the bar 3...
It is configured so that it is locked in place.

To construct the extension footboard 1a, a bar 11 is integrally connected by welding across both opposing side frames 10a, 10a of a gate-shaped round pipe frame, and the bar 11 and the horizontal frame of the frame are connected together by welding. 10b constitutes a wheel lug locking bar.

A plate body 8a similar to that of the footboard 1 is connected to the horizontal frame 10b, and the footboard 1a is extended by the lugs 9 when the wheels 7 ride on the ridges.
It is constructed to prevent the objects from jumping up.

Both ends of the bar 3 provided at the tip of the upper side portion 4 are formed into an elliptical shape by press working with the longitudinal direction of the side frames 2, 2 being the short axis side, and when viewed from the side, the side frames 2 , 2, and the large diameter portions are located in the direction orthogonal to the longitudinal direction of the side frames 2, 2.

Both side frames 10a of the extension footboard 1a,
Plate material 13 made by bending sheet metal at the tip of each of 10a
are connected to each other by welding, and the plate material 13 is provided with engagement recesses 14, 14 that widen toward the back and are inserted into and removed from the different diameter locking portions 12, 12, and the recess 1
The width l ₁ of the fitting openings 4 and 14 is determined by the different diameter locking portion 1.
2, smaller than the length l ₂ of the large diameter part in 12,
In addition, the length of the small diameter portion 1a is larger than the length l ₃ of the small diameter portion, and the extension step plate 1a is fitted from the bottom to the top only in a state perpendicular or almost perpendicular to the upper side portion 4. Diameter locking part 12,
12 by fitting and removing the engaging recesses 14, 14 from the outside, and swinging the engagement recesses 14, 14 so as to be connected in a straight line or almost in a straight line with the upper side portion 4 in the fitted state.
The large diameter portions of the locking portions 12, 12 are arranged perpendicularly or almost perpendicularly to the direction of insertion into the recesses 14, 14, so that the extension footboard 1a is connected to the footboard 1, with the extension plate 1a being prevented from coming off. If you want to cancel the connection, just operate in the opposite manner to the above case.

An angled reinforcing member 15 is integrally connected to the upper surface and side surface of the plate material 13 by welding, and the leading edge 13a of the upper surface of the board material 13 and the leading edge 15a of the reinforcing member 15 are connected to the recessed portion 14. The road shoulder of the ridge is soft, and as the aircraft rides onto the ridge, the tip of the upper part 4 sinks into the ridge.
When oscillates upward, the setting angle (for example, about 15
゜ etc.) The left and right side frames 2, 2 of the upper part 4
The extension step board 1a is prevented by contacting the upper surface.
Both front edges 13a and 15a are formed into stoppers in order to prevent the foot from jumping up and to prevent the foot from sinking in using the extension footboard 1a. Note that the set angle may be set so that the extension footboard 1a is substantially in a straight line with respect to the upper side portion 4.

The rice transplanter A has a front body 1 having an engine 16, a transmission case 17, and the wheels 7.
8 and a rear vehicle body 22 having a seat 19, a control handle 20, and a seedling planting device 21 are connected so as to be bendable around the longitudinal axis X, and the front vehicle body 18 is steered left and right by operating the handle 20. During planting work in the field, a pair of left and right sled bodies 23 disposed at the bottom of the seedling planting device 21,
23 to the ground, and the wheels 7 and these sled bodies 2
3 and 23, and when outside the field, a pair of left and right auxiliary wheels 24, 24 are lowered in place of the sled bodies 23, 23, and the sled is configured to run with three points of contact with the ground. For safety reasons, it is a general rule to get off seat 19 when driving outside the field.
Further, on the rim 25 of the wheel 7, a wide propulsion lug 9 is bent into a chevron shape when viewed from the side, and a rubber grounding material is fitted and fixed in the center of the left and right sides, and a similar grounding material is fitted and fixed thereto. Cylindrical auxiliary lugs 9a... are fixed alternately at equal pitches, and the propulsion lugs 9... are mainly engaged with the bars 3..., 11, 10b to ride on the ridge.

At a predetermined location in the longitudinal direction of the lower side portion 5,
Attachment parts 26, 26 for elastically fitting the side frames 10a, 10a of the extension footboard 1a to the left and right side frames 2, 2, respectively.
As shown in FIG. 3, when not in use, a first imaginary straight line connects the ends of the upper side portion 4 and the lower side portion 5 on the opposite side to the bent side.
L ₁ , a second imaginary straight line L ₂ extending downward from the bent end of the upper side portion 4 and perpendicular to the longitudinal direction of the upper side portion 4, and a space S surrounded by the lower side portion 5 in a side view. The extension step board 1a is detachably attached and stored in a state where most of the extension step board 1a is stored.

Planting mission case 2 of the seedling planting device 21
A gate-shaped carrying handle part 28 is provided protruding from 7, and the left and right support portions 28 of the carrying handle part 28 are provided.
An angular locking member 29 is provided in a row in the middle of the vertical direction of a, 28a, and the extension step board 1 is connected to the locking member 29.
The ladder type footboard 1 is placed and locked in the state where the ladder type footboard 1 is stored.

FIG. 9 shows another embodiment of the mounting portion 26, in which the left and right side frames 2, 2 are provided near the bent portion side ends of the upper side portions 4.
A locking portion 30 is provided for fitting and locking the plate material 13 of the extension footboard 1a, and a pair of clamp members 26a, 26a made of elastic wire are attached to both ends of the bars 3, 11 of the footboards 1, 1a in the longitudinal direction, respectively. By elastically fitting the extension footboard 1a to the footboard 1, the extension footboard 1a can be attached to the footboard 1 in a retracted state without coming off from the locking part 30 due to the contact of the upper surface of the board 13 with the bent lower surface of the side frames 2, 2. be.

The clamp members 26a and 26a may be made of a thin plate with fitting recesses 31a and 31b formed at predetermined locations, as shown in A and B of FIG. As shown in FIG. 3, various modifications are possible, such as integrally welding the lower surface of the bar 3 and attaching it approximately at the center in the longitudinal direction of the bar 3.

Figures 11 and 12 show the extension footboard 1, respectively.
A modification example of a is shown, in which the recess 14 is formed in a state that opens downward substantially perpendicular to the longitudinal direction, and in one of the recesses 14, the side frame 10a is bent so that the substantially center thereof protrudes upward, and,
On the other hand, the end portion of the side frame 10a opposite to the recess 14 is partially bent.

According to the present invention, various modifications can be made to the structure in which the extension footboard 1a is detachably attached to the footboard 1, which is connected to the footboard 1 by, for example, bolts.

The footboards 1, 1a according to the present invention can be applied not only to climbing onto a ridge, but also when loading and unloading onto a transport vehicle or the like, or when unloading onto a ridge. By setting the distance to an appropriate distance or using two sheets, it can be used not only for the one-wheel riding type rice transplanter as described above, but also for two-wheel or four-wheel rice transplanters and other agricultural machines.

[Brief explanation of the drawing]

The drawings show an embodiment of the storage structure for the extension footboard in the ladder-type footboard for agricultural machinery according to the present invention, and
The figure is a side view showing the state in use, Figure 2 is a plan view showing the connected state of the extension footboard, Figure 3 is a side view showing the extension footboard in the retracted state, and Figure 4 is the same as in Figure 3. 5 is a sectional view taken along the line -- in FIG. 3, FIG. 6 is a partially cutaway side view of the connecting portion, FIG. 7 is a partially cutaway side view showing the state before connection, and FIG. 8 9 is a rear view of the main part showing a state in which the footboard is placed; FIG. 9 is a side view showing another embodiment; FIGS. Figures 1 and 12 are side views showing modified examples of the extension footboard, respectively. 1a...Extension footboard, 2...Side frame, 3...Bar material, 4...Upper side portion, 5...Lower side portion, 26...
Storage mounting part, _L1 ...first virtual straight line, _L2 ...second virtual straight line, S...space.

Claims (1)

[Scope of utility model registration request] For extension in a ladder-type footboard for agricultural machinery, in which left and right side frames 2, 2 are connected by wheel lug locking bars 3 placed at a predetermined interval in the longitudinal direction of the side frames 2, 2. It is a storage structure for footboards, and an upper side portion 4 on which the side frames 2, 2 are placed on the upper surface of the ridge.
and a lower side portion 5 extending diagonally across the field, forming a bent shape in side view.
a first imaginary straight line connecting the ends of the upper side portion 4 and the lower side portion 5 on the opposite side to the bent side;
L ₁ , a second imaginary straight line L ₂ extending downward from the bent end of the upper side portion 4 and perpendicular to the longitudinal direction of the upper side portion 4, and a space S surrounded by the lower side portion 5 in side view. A storage mounting portion 26 is attached to the lower side portion 5 to which a ladder-shaped extension footboard 1a is removably attached to the upper side portion 4, with most of it being stored inside. A storage structure for an extension footboard in a ladder-type footboard for agricultural machinery, characterized by: