JP2599779Y2 - Lifting machine - Google Patents

Description

[Detailed description of the invention]

[0001]

[Technical field to which the present invention pertains] The present invention is mounted on the front of a traveling machine such as a tractor, and is used to lift or transport a compost or hay, such as a front loader for loading or excavating, burying back, preparing a field for leveling, or removing snow. About.

[0002]

SUMMARY OF THE INVENTION Conventionally, Japanese Unexamined Patent Publication No. Hei.
No. 725, a controller and a plurality of levers.
A loader elevating cylinder and a dump cylinder.
There is a technology to carry out lifting and carrying work. In addition,
As shown in JP-A-63-1216, a large manual lever
And there is a technology to provide a small automatic lever nearby.
The driver gets out of the vehicle other than the driver's seat and operates the cylinder controls.
Low position where it is not possible to perform work, for example, it is difficult to confirm from the driver's seat
Work such as digging by moving the attachment to
Can not easily perform compost scooping work, etc.
It is not easy to expand the enclosure and improve workability, etc.
There is a problem.

[0003]

In order to solve the problems] However, the present invention is, Ata
Lifting work to provide a boom for mounting
Machine, the loader elevating cylinder and the dump cylinder
The controller that controls the operation is supported on the right side of the driver's seat.
Neutral that can be freely attached and detached through the system and can swing in eight directions
Returnable large manual lever and automatic boom to set height
A neutral return type small automatic lever that moves up and down
A boom position setting device that sets the automatic
A cylinder speed setting device that sets the automatic
One-touch off to turn on / off the automatic lifting control of the automatic lever
Change switch and bucket near the ground by lowering the boom
Parallel to the tractor horizontal grounding control on / off water
When the controller is provided with a flat ground switch,
In addition, a command to detect the detachment of the controller from the support arm
Controller mounted sensor, remove the controller
When the sensor is turned on, the automatic lever
Control lever.
Support arm with controller for setting device and switch
Is installed on the right side of the driver's seat.
The same operation can be performed by handling the controller in both
There is no need to provide special control members for operation outside the vehicle,
Also, the lever and the like have the same shape and
Can be easily prevented, simplifying the control structure and handling operation
Can be easily improved, and the controller
Work outside the vehicle where the controller is installed with a wearing sensor
Can be performed only by manual operation.
Movement can be prevented beforehand, and the operator is sitting in the driver's seat
Controllers with automatic control functions that require
However, it can be easily used for work outside the vehicle, expanding the applicable work range.
It can easily improve the size and workability.
You.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a control circuit diagram of the front loader, FIG. 2 is a side view of the whole, FIG.
(2) and (3) are front and rear wheels of the tractor (1), (4) is a chassis which is a machine base on which the front wheels (2) are mounted, (5) is an engine mounted on the chassis (4), (6) Is a power transmission case provided with the rear wheel (3) connected to the engine (5), (7) is a driver seat mounted on the rear upper surface of the case (6), and (8) is a steering handle. A bucket (10), which is an attachment of the front loader (9), is mounted in front of the tractor (1) via a pair of left and right booms (11). In the figure, (12) indicates the boom (1).
1) a rear mounting frame supporting (1), (13) a horizontal mounting frame for integrally connecting the rear end to the rear mounting frame (12), and (14) a front portion for integrally connecting to the front end side of the horizontal mounting frame (13). Mounting frame, each frame (1
2) While (13) and (14) are formed in a side view gate shape,
Power transmission case (6) Base base (1
5) a rear mounting frame (12) is erected via a rear mounting base (16), and a front mounting frame (14) is erected on the front end side of the chassis (4) via a front mounting base (17). The gate-shaped frames (12), (13), (14) are symmetrically mounted on both sides of the hood (18) covering the engine (5).

Further, as shown in FIG. 4, the base end of the boom (11) is connected and supported at the upper end of the front mounting frame (12) via a pivot pin (19). ) And the fixed locking plate (2) between the boom (11).
0), a loader lifting cylinder (23) is provided via pins (21) and (22), and the boom (11) is raised and lowered appropriately by the expansion and contraction operation of the cylinder (23).

A dump cylinder (28) and a dump cylinder (28) are attached to fixed brackets (24) (25), which are fixed mounting plates between the middle and front ends of the boom (11), via respective swing pins (26) (27). Each base end of the arm (29) is supported, the cylinder (28) and the tip of the arm (29) are interconnected via a pin (30), and the arm (29) is attached to the rear upper end of the bucket (10). ) The tip is interlockingly connected via a pin (31), an upper hook arm (32) and a dump link (33). The lower end of the bucket (10) is supported at the front end of the boom (11) via a pin (34) and a lower hook arm (35). It is configured so that the inclination can be changed appropriately.

Further, as shown in FIG. 5, a notch (37) is formed on the middle front side of the rear mounting base (16) via a hook arm (36).
6) A horizontal opening notch (38) is formed on the front side of the upper end, and a pair of leg plates (39) and (39) are integrally formed on the lower end side of the rear mounting frame (12). The open legs (40) and (40) are formed at the lower ends of the leg plates (39) and (39) while the notches (3) are formed.
7) The locking pins (41) and (42) to be engaged with (38) are integrally and horizontally fixed between the leg plates (39) and (39).

After the pin (41) is engaged with the notch (37) by the guide of the hook arm (36), the rear mounting frame (12) is displaced around the pin (41) to displace the notch (38). A pin (42) is engaged with the left and right mounting bases (16) (1) at the rear of the tractor (1).
6) From the front upper side, connect the upper end to the connecting pipe (43).
Left and right rear mounting frames (12) (12)
Is configured to be engaged and fixed so as to be tiltable and disengageable only forward.

Further, as shown in FIGS. 6 to 9, a holding rod-like body (44) serving as a lock pin is horizontally suspended between the lower ends of the left and right front mounting frames (14) and (14). 17), a square cylindrical holding box (45) is integrally formed, and a cam body (47) is rotatably provided in the box (45) via a support shaft (46).
5) When the bar (44) is engaged with the downward notch (48) of the lower surface from below, the bar (44) comes into contact with the cam (47) to rotate the cam (47), and The hook (49) of the body (47) is engaged with the rod (44), the rod (44) is clamped and supported by the cam (47), and the front mounting frame (17) is attached to the front mounting frame (17). (14)
Are engaged and fixed from below.

Further, a rectangular column-shaped stopper block (5) which falls from above into a gap between the cam body (47) and the inner surface of the box (45) generated when the rod-shaped body (44) is engaged.
7), a stopper block (50) is sandwiched between the inner surface of the box (45) and the cam body (47) as shown in FIG. 7, and the rod body (44) is attached to the front mounting base (4) by the cam body (47).
It is configured to be fixedly supported in 3).

A stopper support plate (51) for engaging and supporting the stopper block (50) at an operation (lock) position or a non-operation (release) position is provided, and a U-shaped guide groove (5) is provided.
2) and the box (4) via the guide pin (53).
5) A support plate (51) is mounted on the outside, and a stopper block (50) is connected to the support plate (51) via an L-shaped arm (54), and the stopper block (51) is connected via the support plate (51). The guide plate (53) is engaged with a U-shaped one end of the guide groove (52) as shown in FIG.
The stopper block (50) is lifted to a non-operating position and supported by the guide groove (52) as shown in FIG.
The guide pin (53) is engaged with the other end of the character shape, and the support plate (5) is engaged.
According to 1), the stopper block (50) is configured to drop into the operation position and be supported.

Further, as shown in FIGS. 10 to 12, brackets (55) (5) parallel to the rear side of the bucket (10).
6), and the pins (31) and (34) are integrally fixed between the brackets (55) and (56).
A stopper pin (57) to be brought into contact with the rear end of the bracket (55) (56) is fixed to the upper hook arm (32), and a pin (3) is inserted into the upper notch (58) of the upper hook arm (32).
In a state in which 1) is engaged, the lifting force of the dump link (33) is applied to the upper hook arm (32) to connect and fix the upper hook arm (32) to the brackets (55) and (56). doing.

Also, a support shaft (5) is attached to the end of the boom (11).
The lower hook arm (35) is rotatably connected via 9), and the front notch (60) of the lower hook arm (35) is connected.
The pin (34) is engaged with the notch (60).
A hook arm (61) for engaging and holding a pin (34) is provided on the lower hook arm (35) via a fulcrum shaft (62) so as to be freely disengageable. ) Is integrally fixed to the fulcrum shaft (62), and the hook arm (61) is engaged with the pin (34) by operating the lever (63).
While the pin (34) is engaged and held on the lower hook arm (35), the hook arm (61) is disengaged from the pin (34),
Pull out the lower hook arm (35) from the pin (34),
The bucket (10) is configured to be detached from the boom (11).

Further, as shown in FIG. 2, a controller (64) for controlling the operation of the cylinders (23) and (28).
Is detachably attached to the right side of the driver's seat (7) via a support arm (65). As shown in FIGS.
A neutral return type manual lever (66) that can swing in any direction,
A neutral return type one-touch automatic lever (67) that automatically raises and lowers the boom (11) to a set height;
1) A variable resistor type boom position setting device (68) for setting the automatic raising / lowering height and a variable resistor type cylinder speed setting device (70) for setting the automatic raising / lowering speed of the boom (11).
And a one-touch changeover switch (71) for turning on and off an automatic raising and lowering control of a one-touch automatic lever (67), and a horizontal grounding control for making the bucket (10) parallel to the tractor (1) near the ground by lowering the boom (11). A horizontal ground switch (72) to be turned on / off, and the controller (6)
Prepare for 4).

As shown in FIG. 1, a boom raising electromagnetic proportional valve (7) for extending and retracting a loader raising / lowering cylinder (23).
3) and a boom lowering electromagnetic proportional valve (74), a bucket dump electromagnetic proportional valve (75) and a bucket scooping electromagnetic proportional valve (76) for extending and retracting the dump cylinder (28), and a loader control constituted by a microcomputer. Each proportional valve (73) is provided via a constant current driver (78) (79) (80) (81) in which a circuit (77) is provided in a controller (64) and an output voltage is changed using a field effect transistor or the like. (76) to the control circuit (77)
Output connection.

A potentiometer-type boom position sensor (82) mounted in parallel to the loader elevating cylinder (23) through the pins (21) and (22);
(30) and a potentiometer type bucket position sensor (83) attached in parallel to the dump cylinder (28) via the boom (1) by each sensor (82) (83).
It is configured to detect the support height and posture of 1) and the bucket (10).

An on-off controller mounting sensor (84) for detecting detachment of the controller (64) from the support arm (65) is provided. When the controller (64) is detached, one-touch operation is performed by the output of the sensor (84). The automatic lever (67) is configured to prohibit the automatic lifting / lowering control.

Also, a one-touch lifting switch (85) which is turned on / off by a one-touch automatic lever (67).
The automatic raising / lowering control for raising / lowering the boom (11) while performing the automatic parallel control for maintaining the attitude of the bucket (10) immediately before the raising / lowering with respect to the tractor (1) to the automatic stop position of the setting device (68). It is composed.

Further, a boom manual potentiometer (87) and a bucket manual potentiometer (88) are provided in conjunction with the manual lever (66), and the one-touch automatic lever (6) is output by the output of each potentiometer (87) (88).
The automatic lifting / lowering control of 7) is stopped, manual control for manually moving the boom (11) and the bucket (10) is started, and automatic parallel control is performed by swinging the manual lever (66) in eight directions. Lowering operation, dumping operation while lowering, dumping operation at a fixed height, dumping operation while ascending, ascending operation while performing automatic parallel control, and scooping operation while ascending. And a scooping operation performed at a constant height and a scooping operation while descending, and an alarm buzzer (89) is provided, and an input / output abnormality of the loader control circuit (77) is notified by sounding. ing.

As is apparent from the above description, in a lifting and carrying work machine provided with a boom (11) for mounting a bucket (10) as an attachment, a loader lifting cylinder
(23) and a command for controlling the operation of the dump cylinder (28).
Controller (64) on the right side of the driver's seat (7).
It is detachably mounted via the arm (65) and swings in eight directions.
Large manual lever (66) with a neutral return type and a set height
Neutral return type that automatically raises and lowers the boom (11)
Automatic lever (67) and boom (11)
A boom position setting device (68) for setting the elevation height;
Cylinder speed setting for setting the automatic lifting / lowering speed of the system (11)
The automatic elevating control of the container (70) and the automatic lever (67) is turned off.
One-touch changeover switch (71) to turn on / off
With the descent of (11), the bucket (10) is moved near the ground.
Turn on / off the horizontal grounding control to make it parallel to the tractor (1)
The horizontal ground switch (72) is connected to the controller (6).
4) and control from the support arm (65).
Controller mounting sensor that detects separation of roller (64)
(84), and the controller (64) is removed.
The automatic lever (6) is output by the output of the sensor (84).
7) Automatic lifting control is prohibited. And each of the above
Bar (66) (67) and setting device (68) (70) and
Controller (6) provided with switches (71) and (72)
4) to the driver's seat (7) right side by the support arm (65)
Installation of the control in both the driver's seat (7) and outside the vehicle
For operation outside the vehicle
It is not necessary to provide a special control member for the
(66) (67) and the like have the same form and
Operation, simplification of the control structure and improvement of handling operability.
Along with the above, the controller mounted sensor (84)
Outside the vehicle where the controller (64) is removed with the
Is performed only by manual operation, and unexpected operation by automatic control is performed.
Check that the worker is sitting in the driver's seat (7).
Controller with automatic control function and other requirements
(64) can be used for work outside the vehicle,
It is designed to expand and improve workability.
You.

This embodiment is configured as described above, and FIG.
As shown in the flowchart of FIG. 5, each of the levers (66)
When (67) is not supported at the neutral position, and when the proportional valves (73) to (76) are not supported off,
An alarm is issued by checking for abnormalities at the start of work.

When the controller (64) is not mounted, when the one-touch changeover switch (71) is manually operated, or when the one-touch changeover switch (71) is manually operated, the manual lever (66) is turned on. By operating each of the potentiometers (87) and (88) in conjunction with the lever, the raising or lowering of the boom (11) is determined based on the output of the boom manual potentiometer (87), and the lever (66) based on the neutral position is determined. The cylinder (22) speed is calculated on the basis of the displacement amount of the cylinder (22), and proportionally via the drivers (78) and (79) so as to drive the cylinder (22) faster as the displacement amount (difference from the neutral position) becomes larger. Valve (73)
(74) to raise or lower the boom (11), determine the dumping or scooping operation of the bucket (10) based on the output of the bucket manual potentiometer (88), and determine the lever (66) based on the neutral position. ) Is calculated via the drivers (80) and (81) so that the cylinder (28) is driven at a higher speed as the displacement (difference from the neutral position) becomes larger. It controls the proportional valves (75) and (76) to dump or scoop the bucket (10).
Each cylinder (22) (2
8) is operated to manually perform the operations of raising and lowering the bucket (10), dumping and scooping.

Further, a controller (64) is mounted,
When the one-touch changeover switch (71) is set to automatic and the lever (66) is neutral and no manual operation is performed, the one-touch manual lever (67) is used to turn on the one-touch lift switch (85) to set the position of the boom (11). The movement position is calculated based on the difference from the automatic stop position of the setting device (68), and the bucket (10) is automatically raised or lowered to the height of the automatic stop position of the setting device (68). As shown in the flow chart of FIG. 16, the bucket (1)
0) The boom (11) is raised at a low speed through the proportional valve (73) while performing the parallel control of the bucket (10) for maintaining the posture, and then the boom (11) is raised at a high speed, and the boom (1) is raised.
When the boom (1) rises to the cushion start position,
1) is again raised at a low speed and stopped at the automatic stop position of the setting device (68).

When the lowering command signal is output by turning on the one-touch raising / lowering switch (85), the bucket (10) parallel to the tractor (1) maintains the attitude of the bucket (10) immediately before lowering, as shown in the flowchart of FIG. While performing control, the boom (1) is controlled via the proportional valve (74).
1) After lowering the boom (11) at a low speed, the boom (11) is lowered at a high speed. When the boom (11) is lowered to the cushion start position, the boom (11) is lowered at a low speed again. Bucket (1
0) With the horizontal control, the bucket (10) is supported in a posture that is horizontal to the tractor (1) below the set ground height, and is stopped at the automatic stop position of the setting device (68).

For example, the automatic stop position of the setting device (68) is set to a traveling height at which the tractor (1) is moved to move the bucket (10) (approximately 40 to 50 cm above ground).
By setting to, after loading or dumping work, the bucket (10) is automatically moved up and down to the traveling travel height just by turning on the one-touch elevation switch (85) by the one-touch automatic lever (67). It is easy to reciprocate between the point where compost or earth and sand is placed and the point where the cargo is transported such as a truck bed. When loading heavy items into the bucket (10), the setting device (68) is automatically operated. By setting the stop position at a low position, the loader operation can be performed safely without falling down.

[0026]

As is clear from the above embodiment, the present invention provides a boom (1) for attaching an attachment (10).
In the lifting / handling work machine provided with 1), the loader elevating
Operation control of the cylinder (23) and the dump cylinder (28)
(64) to the right of the driver's seat (7).
Removably mounted via holding arm (65), in 8 directions
A swingable neutral return type large manual lever (66),
Neutral to automatically raise and lower the boom (11) to the set height
Returnable small automatic lever (67) and boom (11)
Boom position setting device (68) for setting the automatic vertical height
And a cylinder for setting the automatic lifting speed of the boom (11)
Automatic setting of the speed setting device (70) and automatic lever (67)
One-touch changeover switch (71) for turning on / off control
And the bucket near the ground by the descent of the boom (11)
Horizontal grounding control to make (10) parallel to tractor (1)
A horizontal ground switch (72) that is turned on and off;
And a support arm (65).
For detecting the detachment of the controller (64) from the controller
Controller (64), and
When the sensor is removed, the sensor (84) outputs
The automatic lifting control of the lever (67) is configured to be prohibited.
The levers (66) and (67) and the setting device
(68) and (70) and switches (71) and (72) are provided.
Controller (64) by supporting arm (65)
Since it is installed on the right side of the driver's seat (7), the driver's seat (7) or
The same operation is performed by handling the controller (64) both outside the vehicle.
Operation can be performed, specially controlled components for operation outside the vehicle
Need not be provided, and the levers (66) and (67)
And the like have the same form and arrangement so that the operation can be easily prevented.
Simplification of control structure and improvement of handling operability
It can be easily achieved and the controller mounting
Car with the controller (64) provided with the controller (84)
Since external work can be performed only by manual operation, automatic control
The unexpected operation can be prevented beforehand, and the operator can
(7) Automatic control function that requires sitting on
Controller with throat (64) used for work outside the vehicle
To expand the applicable work range and improve workability.
It can be easily achieved.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a loader control circuit.

FIG. 2 is an overall side view.

FIG. 3 is a side view of the front loader.

FIG. 4 is a plan view of the same.

FIG. 5 is a partial rear view.

FIG. 6 is a partial side view.

FIG. 7 is a partial side view.

FIG. 8 is a partial front view.

FIG. 9 is a partial plan view.

FIG. 10 is an explanatory view of bucket attachment.

FIG. 11 is a plan view of the same.

FIG. 12 is a plan view of the same.

FIG. 13 is a front view of the controller.

FIG. 14 is a side view of the same.

FIG. 15 is a flowchart.

FIG. 16 is a flowchart.

FIG. 17 is a flowchart.

[Description of Signs] (7) Driver's seat (10) Bucket (attachment) (11) Boom (23) Loader elevating cylinder (28) Dump cylinder (64) Controller (65) Support arm (66) Manual lever (67) Automatic Lever (68) Boom position setting device (70) Cylinder speed setting device (71) One-touch changeover switch (72) Horizontal ground switch (84) Controller mounted sensor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01B 63/10 A01B 59/048 E02F 9/20 G05G 1/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A attachment boom which is mounted (10) (11) the lifting providing transportation working machine, low
The lifting cylinder (23) and the dump cylinder (28)
The controller (64) for controlling the operation is connected to the driver's seat (7).
Removably attached to the right side via a support arm (65),
Neutral return type large manual lever (6
6) and automatically raise and lower the boom (11) to the set height
A neutral return type small automatic lever (67) and a boom
(11) Boom position setting device for setting the automatic elevation height
(68) and setting the automatic elevating speed of the boom (11)
The cylinder speed setting device (70) and the automatic lever (67)
One-touch changeover switch for turning on / off automatic lifting control
(71) and the boom (11) descends,
Horizontal grounding to make the bucket (10) parallel to the tractor (1)
A horizontal ground switch (72) for turning on / off the control
The controller (64) is provided with a support arm.
Detecting the departure of the controller (64) from (65)
A controller mounting sensor (84);
When (64) is removed, the output of the sensor (84)
More prohibit automatic lift control of automatic lever (67)
Carrying working machine lifting, characterized by being configured to.