JPH0623510Y2 - Mobile agricultural machine handle vertical adjustment mechanism - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) This invention is a handle vertical adjustment mechanism used for mobile agricultural machines such as management machines and rice transplanters. More specifically, a handle is provided on a handle frame provided on the machine body. The present invention relates to a handle vertical adjustment mechanism for a mobile agricultural machine that supports vertically adjustable devices.

(Prior Art) Generally, in a mobile agricultural machine such as a management machine, a vertical adjustment mechanism for the handle is provided between the handle frame and the handle.
The adjustment mechanism allows the height of the handle in the vertical direction to be adjusted to an arbitrary height according to the size of the operator.

In the conventional handle vertical adjustment mechanism, a chrysanthemum seat is attached to each of the handle and the handle frame, and in a state where the chrysanthemums are engaged with each other, the handle and the handle frame are tightened with a fixing bolt. The handle is supported on a handle frame, the fixing bolt is loosened, and the engagement position of each chrysanthemum is changed and adjusted, whereby the vertical height of the handle with respect to the handle frame is arbitrarily adjusted. .

(Problems to be solved by the invention) By the way, in the above-described mobile agricultural machine, it may be desired to temporarily adjust the height of the handle largely in the vertical direction depending on the working conditions. When turning, it is desirable to greatly adjust the height of the handle upwards, so that the handle can be easily moved around without the handle coming into contact with an obstacle. It can be done.

However, in the conventional vertical adjustment mechanism, when adjusting the height of the handle, complicated work such as screwing operation of the fixing bolt and meshing operation of the chrysanthemums is required, and moreover, the operation requires a long time. Therefore, the height of the handle could not be easily adjusted when the mobile agricultural machine was traveling.

The present invention has been made in view of the above problems, and its purpose is to provide a space between the handle frame and the handle.
By providing a fine adjustment means capable of finely adjusting the height of the handle with respect to the frame and a positioning mechanism of the handle capable of greatly adjusting the height of the handle with respect to the frame, the handle with respect to the frame is provided. While the height can be finely adjusted, the height of the handle can be largely adjusted by a simple operation while holding the grip portion of the handle at the steering position behind the handle while traveling around a mobile agricultural machine. The purpose of the present invention is to provide a handle vertical adjustment mechanism for a mobile agricultural machine.

(Means for Solving the Problems) The present invention, as shown in the embodiment of the drawings, includes a handle frame (5) provided on a machine body (1) extending in the width direction with respect to the frame (5), and A rotatably supporting support shaft (7), which supports the handle (6) vertically adjustable via fine adjustment means (8) at both ends in the length direction, and supports the support shaft (7) in the length direction. The handle (6) is supported at both ends so as to be vertically adjustable via a fine adjustment means (8),
A guide tube (91) that extends in a direction orthogonal to the support shaft (7) and rotates integrally with the support shaft (7) is provided in the handle frame (5). A plurality of engaging portions (93
The positioning plate (93) having a) is provided, and the positioning plate (93) is provided in the guide cylinder (91) through the ammunition (94).
A locking member (95) that is biased to the side and selectively engages with one of the engaging portions (93a) is provided so as to be able to advance and retreat, while a supporting member (97) is provided on the guide cylinder (91). ) Is provided, and one end portion of the supporting member (97) has the locking body (9
5) The intermediate portion of the operating arm (99) engaged with the supporting arm (99) is swingably supported in the front-rear direction via a supporting rod (98), and the other end of the operating arm (99) is connected to the handle (6). ) Is interlockingly connected to an operation lever (6a) provided near the grip of the operation lever (6) by an operation wire (W),
By the operation of a), the operating arm (99) is rocked back and forth to move the locking body (95) to the positioning plate (93).
The engaging portion (93a) is moved back and forth so as to be disengageable.

(Operation) However, in the case where work traveling is performed by the mobile agricultural machine, when the height of the handle (6) is adjusted according to the physique of the worker, the support shaft (7) supported by the handle frame (5). And the fine adjustment means (8) provided between the handle (6) and the height of the handle (6) with respect to the handle frame (5) by adjusting the fine adjustment means (8). Is finely adjusted in the vertical direction, and when the height of the handle (6) is greatly adjusted in the vertical direction in the case of rotating the mobile agricultural machine, near the grip of the handle (6). By operating an operating lever (6a) provided on the operating arm (99), the operating arm (99) is swung back and forth around the support rod (98), and the locking body (99) is swung back and forth. 95) the positioning plate (9 By moving the engaging portion (93a) of 3) so that it can be engaged and disengaged, at the steering position behind the handle,
With the grip (6) of the handle (6) held, the operating lever (6a) can be operated to release the positioning mechanism for the handle frame (5) and the support shaft (7). As a result, the angle of the support shaft (7) with respect to the handle frame (5) in the direction of rotation, that is, the height of the handle (6) can be easily and easily adjusted to a large degree. In addition, the distance from the support rod (98) in the actuating arm (99) to the connecting position of the operation wire (W) is set from the support rod (98) to the engagement position with the locking body (95). Can be set to be larger than the operation wire (W), the moving ratio of the locking body (95) with respect to the operation amount of the operation wire (W) can be reduced, and the locking body (95) can be set to the operation wire (W). It can be moved with a relatively small force through the actuating arm (98),
In other words, it is possible to use a large diameter ammunition (94) and reduce rattling of the locking body (95).

(Embodiment) Hereinafter, a handle vertical adjustment mechanism of a mobile agricultural machine according to the present invention will be described with reference to an embodiment of the drawings.

FIG. 7 shows the entire structure of a management machine as an example of a mobile agricultural machine. The engine (2) is mounted on the upper front side of the machine body (1) and the mission case (3) is installed on the rear side of the machine body (1). To support the drive wheels (4) rotatably driven by the engine (2) on both sides of the lower part of the mission case (3), while at the upper position of the mission case (3) the handle frame ( 5) is attached,
A pair of left and right handles (6) extending upward and rearward of the vehicle body are supported on the rear side of the frame (5) so as to be vertically adjustable with respect to the frame (5).

With the management machine configured as described above, the first
As shown in detail in the figure, the handle frame (5)
A support shaft (7) extending in a lateral direction with respect to the frame (5) is rotatably supported inside the rear part of the frame (5), and the handles (6) are provided at both ends in the length direction of the support shaft (7). It is supported by the fine adjustment means (8) so that it can be adjusted up and down.

Specifically, as is apparent from FIGS. 1 and 6, the handle frame (5) is provided with a lower frame (51) having a substantially rectangular shape in plan view with both upper and lower surfaces opened, and the lower frame (51). And a lid (52) fitted in the upper opening of the
Support collars (53) are attached to both side walls (51a) on the rear side of the lower frame (51).
3) rotatably support both sides in the length direction of the support shaft (7).

Further, the support shaft (7) has a through hole (7) that penetrates inward in the axial direction, as shown in FIGS. 2 and 3.
1) is provided to form a substantially cylindrical shape, and flat plane portions (72) are formed on the outer peripheral surface of the support shaft (7) at upper and lower opposing portions, respectively, and the support shaft (7) is formed.
An insertion hole (73) extending orthogonally to the through hole (71) and penetrating the outer peripheral wall surface is formed between the flat surface portions (72) at the intermediate portion in the length direction of the flat surface portion (72). 7
From 2), a plurality of bolt holes (74) extending toward the through hole (71) are formed.

The fine adjusting means (8) is provided between both ends in the length direction of the support shaft (7) formed as described above and the tips of the respective handles (6). 8) is a first chrysanthemum seat (81) provided at both outer ends in the longitudinal direction of the support shaft (7), and a second chrysanthemum seat (82) provided on the inner surface of the distal end of each handle (6). And screwing the handle (6) to the support shaft (7) via the fixing bolt (B) in a state where the first and second chrysanthemum seats (81) and (82) are engaged with each other. The handle (6) is attached to the support shaft (7) by the chrysanthemum (81).
It is supported via (82).

Thus, when the height of each of the handles (6) is finely adjusted in the vertical direction according to the physique of the operator, the fixing bolts (B) are loosened to allow the chrysanthemum seats (81) to be adjusted. (82)
Of the chrysanthemum seats (81) and (82) while changing the meshing positions of the chrysanthemum seats (81) and (82), the handles (6) are adjusted up and down to a predetermined height position, and at each of the adjusted positions, By tightening the handle (6) to the support shaft (7) through the fixing bolt (B), each of the handles (6)
The height of is adjusted finely up and down.

In the embodiment shown in FIG. 2, the first Kikuza (81) is used.
The first and second support bodies (83) (83) (83) (83) and the second ring-shaped support body (84) having the second chrysanthemum (82) are used. The first and second chrysanthemum seats (81) and (82) are attached via 84) to both lengthwise outer ends of the support shaft (7) and the inner surface of the tip of each handle (6). ing.

Further, between the handle frame (5) and the support shaft (7), a plurality of support positions in the rotational direction of the support shaft (7) with respect to the frame (5) are set, and the support positions are set at these set positions. Positioning mechanism (9) for holding the support shaft (7)
Is provided.

The positioning mechanism (9) of the support shaft (7) with respect to the frame (5) is provided in the insertion hole (73) of the support shaft (7) as is clear from FIGS. 1, 4, and 5. A guide tube (91) having a cylindrical shape which is penetrated through, is fitted and fixed to an intermediate portion in the longitudinal direction of the guide tube (91), and is inserted and engaged with each flat surface portion (72) of the support shaft (7). A bracket (92) having a U-shaped cross section, and a positioning plate (93) fixed to the inner rear side of the frame (5),
A plurality of engagement holes (9
3a), and a locking body (95) formed of a locking pin that is constantly biased to the positioning plate (93) side via a spring (94) inside the guide cylinder (91). The support shaft (5) is provided so as to be able to move forward and backward, and the locking body (95) is selectively inserted and locked into each engaging portion (93a) formed of an engaging hole formed in the positioning plate (93). The rotational position of (1) with respect to the frame (5), that is, the vertical height of each of the handles (6) supported by the support shaft (7) can be adjusted.

In the embodiment shown in FIG. 1, the positioning plate (93)
By providing the engaging portions (93a) at the upper and lower two positions, and engaging the engaging bodies (95) housed in the guide cylinders (91) with the engaging portions (93a) in a protruding manner, The rotation position of the support shaft (7) with respect to the frame (5) is largely changed so that the heights of the handles (6) are largely changed at one time.

Further, the upper and lower projections (92a) provided on the bracket (92) are provided on the support shaft (7) when the bracket (92) is inserted and engaged with the support shaft (7). Plural bolt holes (92b) are formed so as to face each bolt hole (74), and each bolt hole (92b) is formed.
To the respective bolt holes (74) of the support shaft (7), the bracket (92) and the support shaft (7) are integrally connected by screwing fixing bolts.

As described above, the bracket (9) is attached to the support shaft (7).
The bracket (9
Not only can the strength of the support shaft (7) be strengthened via 2), but the lateral movement of the support shaft (7) can be restricted by the bracket (92).

In addition, elongated holes (91a) extending in the front-rear direction are formed on both sides of the outer periphery of the guide cylinder (91) in the longitudinal direction at the middle portion thereof, and the locking provided inside the guide cylinder (91) is provided. The body (95) is provided with an operation pin (96) extending orthogonally to the locking body (95).
6) projecting laterally outwardly from each of the elongated holes (91a) and guiding the operation pin (96) in the front-back direction along each of the elongated holes (91a). The engaging body (9) is attached to each engaging portion (93a) of
5) can be locked and released.

Further, a through hole (91b) is formed on the front side in the length direction of the guide cylinder (91), a receiving pin (91c) is attached to the through hole (91b), and the receiving pin (91c) is used. The front side of the spring (94) is received and the pressing force by the spring (94) is applied to the locking body (95).

Then, the locking body (9) by the operation pin (96) is
The forward / backward operation of 5) is performed as follows.

That is, the guide tube (91) and the bracket (92)
A support member (97) having a generally U-shaped cross section that extends downward is integrally fixed to each of the insertion holes (97) formed on both side walls (97a) of the support member (97).
The support rod (98) is inserted into and supported by b), and the support rod (9)
8) Above the both side walls (97a) between the working arms (99)
To be swingable back and forth.

In addition, the support rod (9) in the operating arm (99).
On the upper side of 8), the operation part (99a) branched into two forks.
Is provided, and the guide cylinder (9
1) Operation pin (9) projected from each long hole (91a)
Engagement grooves (99b) for engaging both side ends of 6) are formed respectively.

Then, the lower side of the operating arm (99) and an operating lever (6a) provided near the grip portion of the handle (6) are interlockingly connected via an operating wire (W), and by the operating lever (6a). The operating arm (99) is rocked back and forth by pushing and pulling the operating wire (W), and the operating pin (96) is locked to the operating portion (99a) of the operating arm (99). The locking body (95) is moved forward and backward with respect to the engaging portion (93a) of the positioning plate (93).

As the operation wire (W), in the embodiment shown in FIG. 1, an outer cylinder (O) and an inner wire (I) guided by the outer cylinder (O) are used, and the outer member is attached to the support member (97). The receiving member (U) of the tube (O) is attached, and one end in the length direction of the inner wire (I) protruding from the outer tube (O) is located on the lower side of the operating arm (99), and the inner wire is The other end in the length direction of (I) is connected to the operation lever (6a).

Further, as described above, the inner wire (I) of the operating wire (W) is coupled to the lower side of the operating arm (99), and the upper operating portion (99a) of the arm (99) is connected.
The operation pin (96) of the locking body (95) is supported by the above, and the operation arm (99) is swung about the support rod (98) by the operation of the inner wire (I) to perform the operation. When the structure is such that the locking body (95) is moved by swinging the arm (99) via the operation pin (96), the support rod (9) in the operating arm (99).
The distance from 8) to the connecting position of the inner wire (I) can be set larger than the distance from the supporting rod (98) to the supporting position of the locking body (95).
Therefore, the movement ratio of the locking body (95) with respect to the operation amount of the inner wire (I) can be reduced, that is, the locking body (95) is moved to the inner wire (I) and the operating arm (99). ), It is possible to move the locking body (95) with a relatively small force. In other words, as much as the locking body (95) can be moved by a small force, the spring ( The biasing force of 94) can be increased, that is, the spring (94) having a large diameter can be used, and the locking body (95) can be prevented from being roughened.

When the positioning mechanism (9) is assembled inside the handle frame (5), the lid (52) of the frame (5) is removed and the upper portion of the lower frame (51) is opened. The positioning mechanism (9) is assembled from the upper side of the lower frame (51). Since the lower part of the lower frame (51) is open, the positioning mechanism (9) can be assembled from the lower side of the lower frame (51).

Then, when the vertical height of the handle (6) with respect to the handle frame (5) is largely adjusted, the inner wire (I) of the operation wire (W) is moved by swinging the operation lever (6a). ), The lower side of the operating arm (99) is pulled rearward, and the upper side thereof, that is, the operating portion (99) of the operating arm (99).
a) is swung forward, and along with this, the operating portion (99a)
The locking body (95) in the guide cylinder (91) is engaged with the spring (9) via the support pin (96) supported by the spring (9).
Against 4), the locking body (95) is retracted from the engaging portion (93a) of the positioning plate (93) by retracting within the range of the elongated hole (91a).

Then, in a state where the locking body (95) is disengaged from the engaging portion (93a) of the positioning plate (93), the handle (6) is accompanied by the support shaft (7) and the handle frame (5). With respect to the vertical direction, the pulling force of the inner wire (I) by the operating lever (6a) is released at a predetermined position, and the locking body (95) is pressed by the spring (94). Then, the handle (6) is largely adjusted in the vertical direction with respect to the handle frame (5) by thrustingly engaging with another engaging portion (93a) formed on the positioning plate (93). .

(Effects of the Invention) As described above, in the handle adjusting mechanism for a mobile agricultural machine according to the present invention, the handle frame (5) provided on the machine body (1) extends in the width direction with respect to the frame (5) and has a long length. A support shaft (7) rotatably supporting the handle (6) through fine adjustment means (8) at both ends in the vertical direction is rotatably supported, and both ends in the longitudinal direction of the support shaft (7). The handle (6) is supported by a fine adjustment means (8) so as to be adjustable in the vertical direction, and at the intermediate portion in the longitudinal direction of the support shaft (7) with respect to the support shaft (7). Extending in a rectangular shape,
Further, a guide cylinder (91) that rotates integrally is provided, and a positioning plate (93) having a plurality of engaging portions (93a) in the vertical direction is provided on the rear side of the guide cylinder in the handle frame (5), On the guide tube (91), the ammunition (9
4) is provided with a locking body (95) that is biased toward the positioning plate (93) side and selectively engages with any one of the engaging portions (93a) so as to be able to move forward and backward. Guide tube (9
1) is provided with a support member (97), and the support member (97) is provided.
In addition, an intermediate portion of the operating arm (99) whose one end engages with the locking body (95) is swingably supported in the front-rear direction via a supporting rod (98), and the operating arm (99) is also supported. ) Is linked to an operation lever (6a) provided near the grip of the handle (6) through an operation wire (W), and the operation arm (6a) is operated to operate the operation arm (6a). 99) is rocked back and forth to advance and retract the locking body (95) with respect to the engaging portion (93a) of the positioning plate (93) so that the fine adjustment means (8) can While the height of the handle (6) with respect to the frame (5) can be finely adjusted, the handle (6) can be adjusted.
The height of the handle (6) can be greatly adjusted by a simple operation while grasping.

That is, a positioning mechanism is provided between the support shaft (7) and the frame (5), which is capable of largely adjusting the angle of the rotation direction of the support shaft (7) with respect to the frame (5), and the positioning is performed. The mechanism is operated by operating an operation lever (6a) provided near the grip of the handle (6) to move the operating arm (99) to the support rod (98).
And swings back and forth around the center of the operating arm (99) to move the locking body (95) forward and backward so as to engage and disengage with the engaging portion (93a) of the positioning plate (93). Due to the structure, when the height of the handle (6) with respect to the frame (5) is largely adjusted when the mobile agricultural machine is traveling, the handle (6) is gripped at the steering position behind the handle. It is possible to release the positioning mechanism for the handle frame (5) and the support shaft (7) simply by operating the operation lever (6a) while holding the portion (6), and thereby the handle frame (5) The angle of the support shaft (7) in the direction of rotation with respect to (4), that is, the height of the handle (6) can be easily and easily adjusted to a large degree.
In addition, the distance from the support rod (98) in the actuating arm (99) to the connecting position of the operation wire (W) is set from the support rod (98) to the engagement position with the locking body (95). Since it can be set large for the distance of
The locking body (9) with respect to the operation amount of the operation wire (W).
The movement ratio of 5) can be reduced so that the locking body (95) can be moved with a relatively small force via the operation wire (W) and the operating arm (99). The urging force of the ammunition (94) for urging the locking body (95) can be increased by the amount that the locking body (95) can be moved with a small force. A large diameter can be used, and the rattling of the locking body (95) can be reduced.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part showing a handle adjusting mechanism according to the present invention, FIG. 2 is a plan sectional view of a support shaft used in the handle adjusting mechanism, FIG. 3 is a side sectional view of the same, and FIG. Is a side view of the positioning mechanism used for the handle adjusting mechanism, FIG. 5 is a rear view of the same, FIG. 6 is a partially cutaway plan view of the handle frame,
FIG. 7 is a side view of a management machine shown as an example of a mobile agricultural machine. (1) …… Airframe (5) …… Handle frame (6) …… Handle (7) …… Support shaft (8) …… Fine adjustment means (9) …… Positioning mechanism

Claims (1)

[Scope of utility model registration request] 1. A handle vertical adjustment mechanism for a mobile agricultural machine, which supports a handle (6) on a handle frame (5) provided on a machine body (1) so as to be vertically adjustable with respect to the handle frame (5). Handle frame (5)
A support shaft (7) extending in the width direction with respect to the frame (5)
Is rotatably supported, and the handle (6) is supported at both ends in the longitudinal direction of the support shaft (7) so as to be vertically adjustable via fine adjustment means (8), and the support shaft (7) is also supported. Extending in a direction orthogonal to the support shaft (7) at an intermediate portion in the longitudinal direction of
Further, a guide cylinder (91) that rotates integrally is provided, and a positioning plate (93) having a plurality of engaging portions (93a) in the vertical direction is provided on the rear side of the guide cylinder in the handle frame (5), On the guide tube (91), the ammunition (9
4) is provided with a locking body (95) that is biased toward the positioning plate (93) side and selectively engages with any one of the engaging portions (93a) so as to be able to move forward and backward. Guide tube (9
1) is provided with a support member (97), and the support member (97) is provided.
In addition, an intermediate portion of the operating arm (99) whose one end engages with the locking body (95) is swingably supported in the front-rear direction via a supporting rod (98), and the operating arm (99) is also supported. ) Is linked to an operation lever (6a) provided near the grip of the handle (6) through an operation wire (W), and the operation arm (6a) is operated to operate the operation arm (6a). 99) is rocked back and forth to advance and retreat the locking body (95) with respect to the engaging portion (93a) of the positioning plate (93) so that it can be disengaged. Adjustment mechanism.