JPH083228Y2 - Grounding float mounting structure for paddy work equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention allows the front and rear ends of a grounding float to be swingably supported around the left and right axis and around the front and rear axis to be supported by the machine body. Grounding of a paddy work machine in which a movement restricting mechanism for restricting lateral movement in a state of allowing swinging and vertical swinging within a set range is interposed between the front and rear other end side of the grounding float and the machine body. Float mounting structure.

[Conventional technology]

As a movement restricting mechanism (MI ′) in the above-described ground float mounting structure, conventionally, as shown in FIG. 11, a mounting bracket (51) fixed to the ground float (9 ′) is provided with a pin (52) in a front-back direction. ) To the bracket (53), and the upper end of the bracket (53) is swingably attached to the machine body (V ′) around the axis (Pa) along the left-right direction of the machine body (V ′). 54) is pivotally attached to the free end portion of the body via a pin (55) extending in the left-right direction of the machine body, so that the grounding float (9 ') is attached to the attachment portion (51) and the bracket (53). Allows swinging around the front-rear axis (Pb), and allows vertical swinging within the set range by restricting the horizontal movement by combining the bracket (53) and swing arm (54). It is known to be composed of.

[Problems to be solved by the device]

However, in the above-described structure of the grounding float mounting portion of the paddy work machine according to the related art, the structure for restricting the movement of the grounding float is formed by pivotally connecting three parts to each other, and thus the structure is complicated. It also takes time to assemble, resulting in cost increase.In addition, the assembly error at each pivotal part is accumulated and large backlash is likely to occur as a whole. Then, in the paddy work machine provided with the rolling control mechanism for always maintaining the posture of the machine body horizontally, there is a possibility that the mechanism may malfunction due to the play.

In view of the above situation, an object of the present invention is to provide a grounding float mounting structure for a paddy work machine, which is advantageous in terms of cost and can regulate movement of the grounding float with less rattling.

[Means for solving the problem]

A first aspect of the present invention taken to solve the above problems
The characteristic configuration of is that the front and rear ends of the grounding float are swingably supported around the left and right axis and around the front and rear axis,
A movement restricting mechanism that restricts lateral movement in a state in which swinging around the front-rear axis and vertical swinging within a set range is allowed is provided between the other end of the grounding float and the body. In a grounded float mounting structure for a paddy working machine, the movement restricting mechanism is configured to be vertically swingable around a horizontal axis in the left-right direction along the left-right axis, and the swing member is Vertical swing around the horizontal axis is allowed and relative movement is restricted in the direction along the horizontal axis.
It is configured by a combination with a restricting member that engages with the swing member, and one of the swing member and the restricting member is attached to the machine body, and the other is attached to the ground float. It is in.

A second characteristic configuration of the present invention, which has been devised to solve the above-mentioned problems, is that the front and rear end sides of the grounding float are supported by the machine body so as to be swingable around the left and right axis and the front and rear axis. Paddy work in which a movement restriction mechanism that restricts lateral movement while allowing swinging around and vertical swinging within a set range is interposed between the front and rear other ends of the grounding float and the machine body. In a grounding float mounting structure for a machine, the movement restricting mechanism includes a pin member in a front-back direction,
And a bracket having an elongated vertical hole that allows the vertical movement of the pin member while allowing the vertical movement while preventing the horizontal movement, and one of the pin member and the bracket is the fuselage. And the other is fixed to the ground float.

[Action]

According to the first characteristic configuration of the present invention, one of the swinging member configured as described above and the restricting member engaging with the swinging member as described above is attached to the machine body, and the other is grounded. By mounting on the float, the fuselage and the grounded float are engaged with the swing member so that the restricting member allows vertical swing about the horizontal axis of the swing member. Vertical swinging within a set range between the ground contact float and the grounding float is allowed, and since the regulating member is engaged with the swinging member so as to regulate relative movement in the direction along the horizontal axis, The lateral movement between the body and the ground float is restricted. In other words, a movement restriction mechanism that allows vertical swinging and swinging around the front-rear axis center within a set range between the aircraft and the ground float and that regulates lateral movement is provided between the ground float and the aircraft. This can be realized by a simple configuration with a small number of parts, that is, by simply engaging the two parts of the swinging member pivotally attached to either one and the restricting member fixed to the other.

Further, according to the second characteristic configuration of the present invention, one of the pin member in the front-back direction and the bracket having the vertical hole for penetrating the pin member is a fuselage, and the other is a ground float. By fixing each,
Since the pin member of the airframe and the ground contact float rotate in this slot, swinging around the front-rear axis between the airframe and the ground contact is allowed, and the vertical hole range Since the pin member will move up and down inside,
Vertical swinging within the set range between the airframe and the ground contact float is allowed, and the horizontal movement of the pin member is blocked by the long hole in the vertical position. It is regulated so that it cannot move in any direction. In other words, a movement regulation mechanism that allows vertical swinging and swinging around the front-rear axis center within a set range between the aircraft and the ground float and that regulates lateral movement is provided on the ground float and the aircraft. This can be realized by a simple configuration with a small number of parts, that is, by simply fitting the two parts of the pin member and the bracket, which are distributed and fixed, to each other.

[Effect of device]

In short, the movement restricting mechanism merely restricts the movement of the grounding float with respect to the airframe, and it is not necessary to suspend and support the grounding float from the airframe. In the first characteristic configuration of the present invention, the swing member and the regulating member are simply engaged with each other, and in the second characteristic configuration of the present invention, the pin member in the front-back direction is formed in the elongated hole of the bracket. A rolling fulcrum whose movement in the left-right direction is restricted is formed by simply penetrating it, thereby reducing the number of parts.

As a result, it is possible to reduce the cost of parts and the product cost by simplifying the assembly, and because the number of parts to be assembled between parts is small, assembly errors are not accumulated and large rattling does not occur. , As a whole, it was possible to provide a grounding float mounting structure for a paddy work machine that can reliably control the movement of the grounding float at low cost. In particular, in the second characteristic configuration of the present invention, since the hole through which the pin member penetrates is an elongated hole in a vertical posture, vertical movement within the set range of the ground float with respect to the airframe is allowed, and therefore, movement restriction is performed. Since it is sufficient to fix one of the two parts constituting the mechanism to the ground float and the other to the machine body, it is possible to achieve further cost reduction and rattling.

Further, according to the grounding float mounting structure of the paddy working machine of the present invention, in the one provided with the rolling control mechanism as in the embodiment described later, since the rattling can be reduced, the malfunction of the mechanism can be reduced. Will be able to improve.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

[First Embodiment] As shown in FIG. 4, the front engine (1) and the mission case (2) of the fuselage (V) are mounted, and also serves as a fuselage frame extended rearward from the mission case (2). At the rear end of the transmission case (3), a seedling planting device (7) including a planting case (5), a seedling stand (4) and a seedling planting mechanism (6) is connected, and a mission case (2) The left and right wheels (8) that can swing up and down around the horizontal axis are supported on the center wheel, and the center float (9) as a grounding float is arranged in the middle of the left and right wheels (8). An example is a walk-behind rice transplanter.

The center float (9) is pivotally supported on the traveling machine body (V) so as to be vertically swingable around a fulcrum (P ₁ ) on the rear side of the machine body and to be freely rolled around a front-rear axis center (P ₂ ). Yes, the left and right wheels (8) by the rolling operation based on the fluctuation of the ground pressure on the mud surface of the center float (9)
By changing the relative height of the aircraft, it is possible to maintain the rolling posture of the aircraft in the ground parallel to the mud surface.

That is, as shown in FIG. 3 and FIG. 4, the rear end side of the center float (9) is provided with a U-shaped fixing metal fitting (10) fixedly mounted on the upper surface of the center float (9) to the body (V) side. The support bracket (12) is pivotally attached to the support bracket (12) via the pin (11) in the front-back direction, so that the support bracket (12) is pivotally supported about the left and right axis (P ₁ ), and Both metal fittings (10), (12)
Is pivotally supported on the machine body (V) about the front-rear axis core (P ₂ ), while the front-rear axis core is supported between the front end side of the center float (9) and the machine body (V). (P ₂ ) A movement regulation mechanism (MI) is interposed to regulate the lateral movement while permitting the swinging around (P ₂ ) and the vertical swinging within the set range.

As shown in FIG. 1 and FIG. 2, the movement restricting mechanism (MI) swings up and down around the horizontal axis (P ₀ ) in the left-right direction along the horizontal axis (P ₁ ) on the engine frame (13). Swing member (20) consisting of a pin member that is rotatably supported in a front-back direction
When, with the bolts (22) fixed to the upper surface of the center float (9), a swing member (20), the horizontal axis (P ₀₎ freely relative vertical swinging around the horizontal axis (P ₀₎ And a regulating member (21) formed of an L-shaped bracket having a fitting hole (21a) that is relatively immovable in the direction along the axis and relatively rotatably engaged and held around the front-rear axis. And
The swinging member (2) is inserted into the fitting hole (21a) of the regulating member (21).
Center float (9) due to relative rotation of (0)
Allows rolling around the front-rear axis (P ₂ ) with respect to the machine body (V), and the swinging member (20) can swing up and down relative to the fitting hole (21a) of the regulating member (21). Thus, the center float (9) is allowed to swing up and down with respect to the machine body (V) within a set range, and the swinging member (20) is configured to be swingable only in the up and down direction. ) Fitting hole (21
Since it cannot move relative to the left and right relative to a), it is configured to restrict the center float (9) from moving left and right with respect to the machine body (V).

Therefore, the above-described mounting structure of the center float (9) to the vehicle body (V) on the front end side is used, for example, for supporting the rear end side of the center float (9) on the vehicle body (V). In addition to the combination of the fixing metal fitting (10) and the supporting metal fitting (12), a link mechanism for allowing vertical swing within the setting range of the center float (9) with respect to the machine body (V) is added. Compared with the case of doing so, the swing member (20) swingably attached to the machine body (V) is simply fitted into the fitting hole (21a) of the regulating member (21) fixedly mounted on the center float (9). It is possible to achieve the cost reduction due to the reduction of the number of parts and the rattling of the entire mechanism.

On the other hand, a plate-like detection arm (14) is fixed to the rear portion of the regulation member (21) in a posture in which the detection arm (14) is erected upward, and the detection arm (14) and a rolling described later provided above the mission case (2). A link mechanism (15) links the control mechanism (A).

The link mechanism (15) includes an operation pin (16) that is brought into contact with and linked to the detection arm (14), a bell crank (17) fixed to the operation pin (16), and a rolling control mechanism (A). Of the rod (1
9) and the like, and has a function of transmitting the rolling operation of the center float (9) to the rolling control mechanism (A).

The detection arm (14) has a center float (9).
A long hole (14a) is formed at the center position in the lateral width direction of the upper and lower sides for the operation pin (16) to abuttingly engage, and the center float (9) is formed in the long hole (14a). It is constructed so that it can be raised and lowered within the vertical range. Also,
A turnbuckle mechanism (19a) is provided in the middle of the rod (19), and the rolling control mechanism (A) is provided.
Can be adjusted to a neutral posture in which the left and right wheels (8) are set to the same height.

On the lateral side of the elongated hole (14a), an elongated hole (14b) that is also long in the vertical direction is provided, and the elongated hole (14b) is
Engagement pins (23) extended from the engine frame (13)
Are fitted. An idling roller (24) is externally fitted and attached to the stepped portion of the tip of the engaging pin (23), and the long hole (14
It is constructed so that it can smoothly move up and down relative to b). In addition, the vertical intermediate width (L) of the elongated hole (14b) is made larger than the diameter (D) of the idler roller (24) to allow a certain range of roll operation in the center float (9). is there. Further, when the center float (9) rises with respect to the vehicle body (V) due to a ridge or the like, or when the center float (9) descends while traveling on the road, the engagement pin (23) causes the engagement hole (14) to fall into the long hole (14).
b) Fitting in the small diameter portions formed at the upper and lower ends, the center float (9) is held in a fixed posture to prevent the rolling operation by abutment.

Next, the lifting / rolling drive system on the machine body (V) side will be described.

As shown in FIGS. 3 and 4, the left and right wheels (8L),
Wheel transmission case (25L), (25
R) is pivotally supported on the mission case (2) so that it can swing up and down, and brackets (26L) and (26R) that are erected on the base ends of the wheel transmission cases (25L) and (25R), and a lifting cylinder. Connect both ends of the balance arm (29) attached to the piston rod (28) of (27) to the left and right linkage rods (30L),
Connect with (30R), so that left and right wheels (8L), (8R)
A vertical drive mechanism (C) for synchronizing and moving in the same direction is configured.

On the other hand, a cylinder (31) for rolling control is provided on the right link rod (30R), and the vertical arm (P ₅ ) of the balance arm (29) with respect to the piston rod (28) is expanded and contracted by expanding and contracting the cylinder (31). ) A rolling control mechanism (A) that relatively vertically moves the left and right wheels (8L) and (8R) by horizontally swinging around them is configured.

This rolling control mechanism (A) is interlocked with the swinging motion of the detection arm (14) by the rolling operation around the front and rear axis (P ₂ ) based on the fluctuation of the ground pressure on the mud surface of the center float (9). When the operating arm (18) is operated via the link mechanism (15), the control valve (32) of the rolling cylinder (31) is operated to perform rolling control.

In addition, an L-shaped molded reinforcing member (33) for increasing the mounting strength is welded and fixed to the restricting member (21), and the reinforcing member (33) is extended to the left and right ends of the center float (9). It has been extended. Auxiliary floats (34) for increasing the grounding area for rolling operation are attached to both left and right sides of the center float (9), and support brackets (35) for connecting the pair of auxiliary floats (34) are attached. ) End face of the reinforcing member (33)
It is located between the center float (9) and the edge of the center float (9) and is bolted. Also, center float (9)
A longitudinal reinforcing member (36) extending from the attachment position of the restriction member (21) to the pivotal support position on the rear end side is attached and fixed to the lower left and right central lower faces.

[Second Embodiment] This embodiment is also applied to a walk-behind rice transplanter, and is different from the above-described [first embodiment] only in the configuration of the movement restricting mechanism (MI). is there. Therefore, description of other parts will be omitted.

As shown in FIGS. 5 and 6, the movement restricting mechanism (MI) in this embodiment has a pin member (4
0) is fixed to the engine frame (13), and an L-shaped bracket (41) having an elongated vertical hole (41a) through which the pin member (40) passes is fixed to the upper surface of the center float (9). Since the pin member (40) is rotatable with respect to the fitting hole (41a) of the bracket (41), rolling of the center float (9) around the longitudinal axis (P ₂ ) with respect to the machine body (V) is achieved. And the pin member (40) is vertically movable within the elongated hole (41a) of the bracket (41), so that the center float (9) swings up and down with respect to the machine body (V) within a set range. And the pin member (40) and the bracket (41), which are fixed to each other, are linked through the elongated vertical hole (41a), so that the center float (9) can move in the left-right direction with respect to the machine body (V). It is configured to restrict movement so that it cannot be moved.

Also in the case of this embodiment, the pin member (40) fixed to the machine body (V) has the structure for restricting the movement of the center float (9) with respect to the machine body (V) on the front end side. It can be realized with a simple structure that only fits in the fitting hole (41a) of the bracket (41) fixed to the float (9), and the number of parts can be reduced.
By eliminating the pivotal support structure required in the first embodiment, further cost reduction and overall rattling can be achieved.

The elongated hole (41a) may be formed at any of the upper and lower portions of the bracket (41), but as shown in the figure, it is better to form it at a position closer to the upper surface of the center float (9).
This is preferable because it is difficult to apply excessive force to the mounting portion of the bracket (41).

[Another embodiment]

 Next, another embodiment will be listed.

<1> Modification of [First Embodiment].

<1-1> As shown in FIGS. 7 and 8, a rocking member (20) made up of a pin member in a front-rear posture pivotally supported so as to be vertically rockable around a horizontal axis (P ₀ ) in the left-right direction. ) Is attached to the center float (9), and a regulating member (21) consisting of a bracket having a fitting hole (21a) for engaging and holding the swinging member (20) as in the first embodiment is attached to the body ( The movement regulation mechanism (MI) may be configured by fixing the movement regulation mechanism (MI).

<1-2> As shown in FIGS. 9 and 10, among the two members constituting the movement restricting mechanism (MI), the restricting member (21) is fixed to the center float (9). The swing member (20) is composed of a front and rear pin member and is pivotally supported by the body (V) so as to be vertically swingable around a horizontal axis (P ₀ ) in the horizontal direction. As described above, a bracket having a fitting hole (20a) for engaging and holding the regulating member (21) may be used.

<1-3> Although not shown, of the two members constituting the movement restricting mechanism (MI), the restricting member (21) is the body (V).
The swing member (20) is pivotally supported by the center float (9) so as to be vertically swingable around the horizontal axis (P ₀ ) in the left-right direction. Alternatively, the bracket may have a fitting hole (20a) for engaging and holding the regulating member (21) as in the first embodiment.

In short, in the [first embodiment], the swinging member (20) and the restricting member (21) that form the movement restricting mechanism (MI).
And the center float (9) may be distributed to the airframe (V) and the center float (9), and the rocking member (20) and the restricting member (21) may be configured as the rocking member (20) and the restricting member. and a member (21), freely relative swinging in a direction along a plane perpendicular to the horizontal axis (P _0), the relatively immovable in the direction along the horizontal axis (P _0), the relative is around longitudinal axis The structure can be changed into various forms as long as the structure is engaged in a rotatable manner.

<2> Modification of [Second Embodiment].

<2-1> Although not shown, a bracket having a vertically oriented long hole (41a) through which the pin member (40) penetrates is fixedly fixed to the center float (9). The (41) may be fixed to the machine body (V).

That is, in the second embodiment, the pin member (40) that constitutes the movement restricting mechanism (MI) and the bracket (41) that penetrates the pin member (40) are distributed to the machine body (V) and the center float (9). Should be placed.

<3> The mounting structure of the center float (9) on the rear end side of the body (V) can be appropriately changed. In addition, the center float (9) is pivotally supported on the machine body (V) on the front end side, and the movement restricting mechanism (MI) is interposed between the center float (9) and the machine body (V) on the rear end side. V) may be attached.

<4> In the previous embodiment, the walk-type rice transplanter was described as an example of the paddy field working machine, but the present invention can also be applied to other paddy field working machines such as a flooded direct seeding machine.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

1 to 4 show an embodiment of a grounding float structure of a paddy working machine according to the present invention, FIG. 1 is a vertical sectional front view of a main portion, FIG. 2 is a vertical sectional side view of the main portion, and FIG. Is a plan view of the rice transplanter, and FIG. 4 is an overall side view of the rice transplanter. 5 to 10 show another embodiment, and FIG. 5, FIG. 7 and FIG. 9 are longitudinal side views of the main part, FIG. 6, FIG. 8 and FIG. FIG. 10 is a vertical sectional front view of a main part of the embodiment shown in FIGS. 7 and 9. FIG. 11 is a vertical sectional side view corresponding to FIG. 2 showing a conventional example. (9) …… Ground float, (20) …… Rotating member, (21)
…… Regulation member, (40) …… Pin member, (41) …… Bracket, (41a) …… Slot, (MI) …… Movement restriction mechanism, (P
₀ ) …… Horizontal axis core, (P ₁ ) …… Left and right axis core, (P ₂ ) …… Front and rear axis center, (V) …… Airframe.

Claims (2)

[Scope of utility model registration request] 1. A grounding float (9) is supported at its one front and rear end side by a body (V) so as to be swingable around a left and right axial center (P ₁ ) and a front and rear axial center (P ₂ ). ₂ ) A movement restricting mechanism (MI) that restricts lateral movement while allowing swinging around and vertical swinging within a set range is provided on the other side of the ground float (9) and the body (V). a ground floating mounting structure of paddy working machine that is interposed between said movement restriction mechanism (MI), the lateral axis (P ₁₎ in along the lateral direction of the horizontal axis (P ₀₎ A swing member (20) configured to be swingable up and down around the swing member (20), and the swing member (20) is allowed to swing up and down around the horizontal axis (P ₀ ), and the horizontal axis (P _{0 0} ) in combination with a restricting member (21) engaging with the swinging member (20) so as to restrict relative movement in the direction along One of the swinging member (20) and the regulating member (21) is attached to the machine body (V), and the other is attached to the grounding float (9). 2. A ground float (9) is swingably supported around the left and right axial cores (P ₁ ) and around the longitudinal axial center (P ₂ ) on the machine body (V), and the front and rear axial cores (P) are supported. ₂ ) A movement restricting mechanism (MI) that restricts lateral movement while allowing swinging around and vertical swinging within a set range is provided on the other side of the ground float (9) and the body (V). A structure for mounting a ground float of a paddy work machine interposed between a pin member (40) in a front-back direction and a pin member (40) in a front-back direction. And a bracket (41) having an elongated vertical hole (41a) that allows the vertical movement of the pin member (40) while preventing the vertical movement of the pin member (40) and the bracket (41). One of the paddy work machines is fixed to the machine body (V) and the other is fixed to the grounding float (9). Ground float mounting structure.