JPH10117504A - Protective cap non-mounting prevention device for coupler for electric cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for reporting the forgetting of the attachment to a machine body side coupler of the cap for protection of the machine body side coupler for freely attachably and detachably connecting the electric cables on the traveling machine body side and work machine side of a tractor. SOLUTION: This device is provided with reporting devices for reporting the non-mounting of the cap 72 to an operator by the operation of a sensor 92 for sensing whether or not the cap 72 for protection covering the machine body side coupler 46 provided near the machine body side coupler 46 in the couplers 44 and 46 for freely attachably and detachably connecting the electric cables 42 and 43 on the traveling machine body side and the work machine side and made freely attachable and detachable to/from the machine body side coupler 46 is mounted on the machine body side coupler 46 when both couplers 44 and 46 are separated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing a protective cap from being attached to an electric cable coupler for connecting an electric cable on a working machine side and an electric cable on a machine body in a tractor.

[0002]

2. Description of the Related Art Conventionally, a coupler for detachably connecting opposing electric cables wired respectively to a traveling body side and a work machine side of a tractor is provided, and some couplers are separated from each other. In some cases, a cap for covering the fuselage-side coupler is detachably provided on the fuselage-side coupler for protection during the operation.

[0003]

However, since the mechanism for notifying whether or not the cap is attached to the fuselage-side coupler when the two couplers are separated is not provided, it is relatively common to forget to attach the cap. There is a drawback in that the problem of corrosion of the terminals of the fuselage-side coupler and accumulation of dust in the fuselage-side coupler occurs due to the occurrence of such a failure to attach the cap.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the apparatus for preventing the protection cap from being attached to the coupler for an electric cable according to the present invention is provided with electric cables 42, 43 on the traveling body 1 side and the work machine 2 side of the tractor. 4 for detachable connection of
4 and 46, and a protective cap 72 for covering the body-side coupler 46 for protection when the two couplers 44 and 46 are separated is provided detachably with respect to the body-side coupler 46. Near the fuselage side coupler 4
6 is provided with a sensor 92 for detecting whether or not the cap 72 is mounted, and informing devices 88 and 89 for notifying the worker that the cap 72 is not mounted by operating the sensor 92.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an auto hitch 3 provided at a rear portion of a traveling body 1 of a tractor, to which a working machine 2 for tilling can be automatically connected and mounted, and FIG. FIG. 2 is a left side view showing a case in which the work implement 2 is not mounted on the traveling body 1 side, and FIG.

As shown in FIGS. 1 and 2, the auto hitch 3 has left and right lower links 6 whose front ends are pivotally connected to the traveling body 1 (mission case 4). A hitch frame 7 erected between the rear ends, an upper hook 8 is fixed at an upper central position of the hitch frame 7, and a lower hook 9 is fixed at lower left and right ends. A hook plate 10 is supported on the side.

The upper hook 9 is connected to a bracket 11 provided on the upper rear end side of the traveling body 1 by a top link 12. At this time, as shown in FIGS. 3 and 4, the lower left and right ends of the hitch frame 7 are connected by a connecting frame 13 formed of a square pipe material. Fifteen
(See FIG. 10) Yoke bracket 1 for supporting at substantially the center
6 are provided. Then, the auto hitch 3 raises and lowers a lift arm (not shown) connected to the auto hitch 3 side by extending and retracting a hydraulic cylinder (not shown) connected to the lift arm as in the conventional case. 2 is raised and lowered.

On the other hand, a top mast 28 fixed to a gear case 27 constituting a frame of the working machine is provided at the center of the upper part of the conventionally known working machine 2 provided with a rotary 26 for tilling. A connecting pin 29 is provided at a front end of the vehicle 1 for engaging with the upper hook 8 on the traveling body 1 side. The top mast 28 and the gear case 27 are connected via a mast stay 36 or the like, and an engagement pin 38 that engages with the lower hook 9 protrudes left and right on the mast stay 36 side.

When the traveling machine 1 and the work machine 2 are connected to each other from the separated state, the work machine 2 is first erected on the ground, and the traveling machine 1 is connected to the upper hook with the auto hitch 3 lowered. The auto hitch 3 is raised by approaching the work implement 2 so that the position 8 is located directly below the connecting pin 29,
By lifting the connecting pin 29 on the side of the working machine 2 by the upper hook 8, the working machine 2 takes a forward inclined posture with the connecting pin 29 as a fulcrum, and the engaging pin 38 enters the lower hook 9, so that the lower hook 9 is Holding the closing engagement pin 38, the working machine 2 is automatically set to the traveling machine body 1 with one touch.

On the other hand, the work machine 2 has a main cover 40 fixed to the gear case 27 which covers the upper part of the rotary 26 and a rear cover slidably mounted on the main cover 40 to cover the rear of the rotary 26 as in the prior art. The main cover 40 is provided with an electric motor (not shown) for vertically moving the rear cover 41 and a tillage depth sensor 82 (see FIG. 4) for detecting the rotation state (rotation angle) of the rear cover 41. 6). At this time, the tillage depth sensor 82 and the rear cover 41 are connected via a link mechanism (not shown), and the tillage depth sensor 82 is configured to sense the movement of the rear cover 41 via the link mechanism. .

As shown in FIGS. 3 and 4, etc., the working machine 2 has a working machine cable for supplying power from the traveling machine body 1 to the electric motor and the tillage sensor 82 and for transmitting and receiving electric signals. Reference numeral 43 is wired, and a machine body cable 42 facing the work machine cable 43 is also provided on the traveling machine body 1 side. At this time, the working machine cable 43 and the machine body cable 42 have sockets that can be fitted to and removed from each other, and a concave guide 49 having a substantially conical shape that can be fitted to the outside of the socket.
It is connectable via a pair of working machine couplers 44 and machine body couplers 46 on which the convex guides 51 are formed.

When the concave guide 49 and the convex guide 51 are fitted so that the sockets are connected to each other, the working machine coupler 44 and the machine body coupler 46 are connected, and the working machine cable 43 and the machine body cable 42 are connected. On the other hand, the fuselage coupler 46 is fixed to a mounting plate 52 that is substantially L-shaped in plan view and is fixed to the left side surface of the yoke bracket 16 with bolts or the like. It is covered by a cylindrical cover 53 fixed to the plate 52.

The work machine coupler 44 is mounted on a mounting member 56 fixed to the side surface of the gear case 27 of the work machine 2 via a box-shaped bracket 57 whose lower part is opened. The working machine coupler 44 is connected via a plurality (four) of support bolts 59 attached to the end of the flange 44a of the working machine coupler 44.
Is movably protruded and supported. A spring 63 is provided between the flange 44a of the support bolt 59 and the front surface of the bracket 57 so as to be fitted outside, and the working machine coupler 44 is always urged forward.

At this time, the bracket 57 of the support bolt 59
And the connecting portion of the working machine cable 43 with the working machine coupler 44 are located in the bracket 57 to be protected from rain, muddy water, etc., and the outer periphery of the working machine coupler 44 supported by the bracket 57. Is covered by a cover 66 provided on the front surface of the bracket 57. The work machine coupler 44 and the machine body coupler 46 are connected to the work machine 2
Are connected to the traveling body 1 so as to face each other.

When the automatic hitch 3 automatically connects the traveling machine 1 to the work machine 2, the work machine coupler 44 moves along an arc-shaped locus centered on the connecting pin 29.
However, since the working machine coupler 44 is movably supported by the bracket 57, the concave guide 49 and the convex guide 51 are smoothly fitted by the approach of the working machine 2 and the traveling machine body 1, so that the working machine The coupler 44 and the machine coupler 46 are automatically and smoothly connected, and the work machine cable 43 and the machine cable 42 are automatically connected. When the work machine 2 is detached from the traveling machine body 1, the work machine coupler 44 moves smoothly, so that the work machine coupler 44 and the machine body coupler 4
6 is easily and automatically disconnected, and the connection between the work machine cable 43 and the machine body cable 42 is automatically disconnected.

As shown in FIGS. 3 and 4, the upper surface of the cover 66 is elastically inserted into the concave guide 49 and covers the socket of the working machine coupler 44 by elasticity such as rubber to protect the socket. A cap 67 made of a material is attached via a string-like connecting portion 67a, and the working machine 2 is detached from the traveling machine body 1 as shown in FIG. When the machine body coupler 46 is separated, the cap (work implement coupler 44) is protected by putting the cap 67 on the socket. When the cap 67 is not used, the projection 6 provided on the upper surface of the bracket 57 as shown in FIG.
8 is elastically fitted to the outside.

Also, as shown in FIGS. 3 and 4, the body coupler 46 is resiliently fitted to the convex portion 51 on the mounting portion 52a of the mounting plate 52 where the body coupler 46 is mounted. Flange 7 attached to fuselage coupler 46 to cover socket 46
Cap 72 made of an elastic material such as rubber provided with
The cap 72 is attached to the socket when the working machine coupler 44 and the machine body coupler 46 are separated as shown in FIG. 4 (the machine body coupler 46). To protect the socket (body coupler 46).

When the cap 72 is mounted on the body coupler 46, the flange 71 of the cap 72 and the mounting portion 52a of the mounting plate 52 come into contact as shown in FIG. At this time, the mounting projection 7 is provided on the left side surface of the mounting plate 52.
4 is provided so as to protrude to the left side.
7 when the body coupler 46 is connected to the
When the cap 2 is not used, the cap 72 can be detachably mounted on the traveling machine body 1 by externally fitting the cap 72 to the mounting projection 74.

On the other hand, as shown in FIG. 5, a working machine 2 is provided on the traveling machine body 1 so as to keep a preset plowing depth constant.
Control (the details will be described later) for automatically controlling the position (height) of the vehicle, and position control control for setting the work implement 2 to an arbitrary position by a position control lever (not shown) provided on the driver's seat 1a side. A control device 76 having functions such as (details will be omitted) is provided. The control device 76 includes a microcomputer unit 77, an output interface 78, and the like.

At this time, the input of the control device 76 (the input of the microcomputer unit 77) includes an automatic plowing switch 79 provided on the driver's seat 1a side for setting ON and OFF of the automatic plowing control and a predetermined plowing operation. A setting volume 81 for setting the depth amount is connected, and the
The working depth sensor 82 is also connected by connecting the work machine coupler 44, and further connected to a lift arm sensor 83 for detecting the angle of the lift arm and a position control lever, which corresponds to the swing of the position control lever (position setting). The position setting potentiometer 84 that outputs the data obtained is also connected.

On the other hand, solenoids 86 and 87 of ascending and descending electromagnetic control valves for driving expansion and contraction of a hydraulic cylinder for raising and lowering the lift arm are connected to the output of the controller 76 (output of the output interface 78). As described later, a buzzer sound is generated by the tillage depth monitor lamp 88 (provided on the driver's seat 1a side) which is turned on when the above-mentioned tillage depth automatic control is turned on, or by energization (ON) under the conditions described later. A buzzer 89 and the like are also connected.

The control device 82 is provided with the automatic cultivation depth switch 7.
When the switch 9 is ON, the tillage depth monitor lamp 88 is turned on under the conditions described later, and the movement (rotation angle) data of the rear cover 41 and the data from the setting volume 81 input by the tillage depth sensor 82. Control the solenoids 86, 87 for ascending or descending (ON, O
FF), the hydraulic cylinder is extended and retracted to operate the lift arm, and the position (height) of the work machine 2 is automatically controlled to perform the cultivation depth automatic control for keeping the cultivation depth constant.

As shown in FIGS. 6 and 7, a hole 75 is formed in the outer peripheral portion of the body coupler 46 of the mounting portion 52a, and a sensing switch 92 as a limit switch is formed in the mounting portion 52a. The switch portion 92a is mounted so as to project from the hole 75 to the outside of the mounting plate 52. As a result, when the cap 72 is attached to the body coupler 46 as described above, the flange 71 of the cap 72 contacts the switch portion 92a of the sensing switch 92 to push the switch portion 92a, and the sensing switch 92a is pressed.
Turns ON. That is, the sensing switch 92 is connected to the body coupler 4
6 functions as a sensor that is switched from OFF to ON when the cap 72 detached from 6 is attached to the body coupler 46.

On the other hand, the machine body coupler 46 and the work machine coupler 4 are connected to the machine body coupler 46 and the work machine coupler 4 as described above.
4 is provided with a coupler switch 93 that is turned on when the connection is made. The input side of the control device 76 is also connected to the coupler switch 93 and the sensing switch 92. Then, the control device 76 gives the operator a signal based on the data (ON and OFF signals) from the coupler switch 93 and the sensing switch 92 when the machine coupler 46 and the work machine coupler 44 are separated by an operation described later. It also has a cap forget notification function for notifying that the cap 72 is not attached.

Next, the operation of the cap forgetting notification function by the control device 76 will be described with reference to the flowchart of FIG. First, it is determined whether or not the machine coupler 46 and the work machine coupler 44 are connected by turning on / off the coupler switch 93.
Is checked (if the machine body coupler 46 and the work machine coupler 44 are connected), it is checked whether or not the automatic plowing depth control is to be performed by turning on and off the automatic plowing depth switch 79, and OFF ( In the case where the automatic plowing depth control is not performed), the buzzer 89 and the plowing depth monitor lamp 88 are respectively turned OFF to turn off the automatic plowing depth control. In the case of ON, the plowing depth monitor lamp 88 is turned on and the buzzer 89 is turned OFF. Operate the deep automatic control.

On the other hand, the coupler switch 93 is OFF (the machine coupler 46 and the work machine coupler 44 are not connected).
In this case, next, the ON / OFF of the sensing switch 92 is checked. If the sensing switch 92 is ON, the cap 72 is attached to the fuselage coupler 46 as described above. Machine coupler 44
Is disconnected, but it is determined that the cap 72 is attached to the fuselage coupler 46, and the buzzer 89 is turned off.
At the same time as the FF, the depth monitoring lamp 88 is turned off.

When the sensing switch 92 is OFF,
After the couplers 44 and 46 are disconnected, the cap 72 is not attached to the body coupler 46. Therefore, the controller 76 attaches the cap 72 to the body coupler 46 with the machine coupler 46 and the work machine coupler 44 disconnected. It is determined that the cap 72 has not been turned on, the buzzer 89 is turned on to generate a buzzer sound, and the tillage depth monitor lamp 88 is blinked to notify the operator of forgetting to attach the cap 72.
For this reason, the operator can reliably recognize that the cap 72 has been forgotten to be attached, and the cap 72 can be attached to the body coupler 46.
Is prevented from being forgotten.

As a result, when the machine coupler 46 and the work machine coupler 44 are separated from each other, the cap 72 is securely attached to the machine coupler 46, so that the terminals in the machine coupler 46 are not exposed to the outside. In addition to preventing corrosion of the terminals, there is no accumulation of dust and the like in the body coupler 46. A timer may be provided on the microcomputer unit 77 side, and the detection switch 92 may be checked after a predetermined time (a time set by the timer as a time for attaching the cap 72 to the body coupler 46). In the above embodiment, the sensing switch 92 is a sensor.
When the cap 72 is attached to the fuselage coupler 46,
Although the case where the FF is switched to ON has been described, the same control as described above can be performed by a sensor or the like which is switched from ON to OFF when the cap 72 is attached to the body coupler 46.

Next, the case where the sensing switch 92 is provided on the mounting projection 74 will be described. In the case of the present embodiment, FIG.
As shown in FIG. 11, the mounting projection 74 is formed in a hollow cylindrical shape having a hole 91 formed in a part of the peripheral surface, and the switch portion 92a of the sensing switch 92 is provided in the mounting projection 74. A sensing switch 92 is provided so as to protrude from the peripheral surface of 74. As a result, when the cap 72 is fitted on the mounting projection 74, the cap 72 comes into contact with the switch 92a of the sensing switch 92 and presses the switch 92a, so that the sensing switch 92 is turned on. That is, the sensor switch 92 functions as a sensor that can be switched from OFF to ON when the cap 72 that is detached from the mounting projection 74 is attached to the mounting projection 74. Note that the cap 72 does not have to include the flange 71 due to the above structure.

Next, the operation of the cap forgetting notification function by the control device 76 using the data (ON and OFF signals) from the sensing switch 92 provided on the placement protrusion 74 will be described with reference to the flowchart of FIG. As in the flowchart of FIG. 8, first, it is checked whether or not the machine body coupler 46 and the work machine coupler 44 are connected by turning on and off the coupler switch 93. If the coupler switch 93 is turned on, it is determined whether or not to perform automatic plowing depth control. A check is made by turning on and off the automatic cultivation depth switch 79 provided on the side 1a. If the automatic cultivation depth switch 79 is off, the buzzer 89 and the cultivation depth monitor lamp 88 are turned off to turn off the cultivation depth automatic control, and are turned on. In this case, the tillage depth monitor lamp 88 is turned on, the buzzer 89 is turned off, and the tillage depth automatic control is operated.

If the coupler switch 93 is OFF, then the ON / OFF state of the sensing switch 92 is checked. If the sensing switch 92 is OFF, the cap 72 is not attached to the mounting projection 74. 7
Reference numeral 6 denotes a state in which the machine coupler 46 and the work machine coupler 44 are separated, but it is determined that the cap 72 is attached to the machine coupler 46, the buzzer 89 is turned off, and the cultivation depth monitor lamp 88 is turned off. .

When the sensing switch 92 is ON, the cap 72 is attached to the mounting projection 74, so that the controller 76 moves the cap 72 to the machine coupler 46 with the machine coupler 46 and the work machine coupler 44 separated. It is determined that the cap 72 has not been attached, the buzzer 89 is turned on to generate a buzzer sound, the tillage depth monitor lamp 88 flashes, and the operator is notified that the cap 72 has been forgotten.

Therefore, the operator can surely recognize that the cap 72 has been forgotten to be attached, and the forgetting of attaching the cap 72 to the body coupler 46 can be prevented, so that the same effect as in the above-described embodiment can be obtained.

[0034]

According to the present invention constructed as described above, after the working machine coupler and the machine side coupler are separated by, for example, disconnecting the working machine from the machine body, the protective cap is attached to the machine side coupler. A warning device such as a buzzer or a tillage depth control lamp informs the worker whether or not the cap is attached to the operator, so that forgetting to attach the cap to the fuselage-side coupler is prevented, and the terminal of the fuselage-side coupler is prevented. This has the effect of preventing corrosion of dust and accumulation of dust.

[Brief description of the drawings]

FIG. 1 is a rear view of a tractor and a left side view of a working machine.

FIG. 2 is a left side view of the tractor to which the working machine is connected.

FIG. 3 is a left side view of a machine body coupler and a work machine coupler portion showing a connected state.

FIG. 4 is a left side view of the machine body coupler and the work machine coupler, showing a separated state.

FIG. 5 is a block circuit diagram of a control device part.

FIG. 6 is a left side view of the fuselage coupler.

FIG. 7 is a rear view of the body coupler.

FIG. 8 is a flowchart illustrating an operation of a cap forgetting notification function.

FIG. 9 is a left side view of a machine coupler and a working machine coupler according to another embodiment, showing a separated state.

FIG. 10 is a rear view of an airframe coupler according to another embodiment.

FIG. 11 is a rear view of a main part of a fuselage coupler according to another embodiment.

FIG. 12 is a flowchart illustrating the operation of a forgotten cap notification function according to another embodiment.

[Explanation of symbols]

 Reference Signs List 1 traveling machine body 2 work machine 42 machine cable (electric cable) 43 work machine cable (electric cable) 44 work machine coupler (coupler) 46 machine coupler (coupler) 72 cap 92 sensing switch (sensor) 88 tillage depth monitor lamp (information device) ) 89 Buzzer (alarm device)

Claims (1)

[Claims] 1. Couplers (44) and (46) for detachably connecting electric cables (42) and (43) are provided on the traveling body (1) side and the work machine (2) side of a tractor, respectively. A protective cap (72) for covering the body-side coupler (46) for protection when (44) and (46) are separated.
And a sensor (92) for detecting whether or not the cap (72) is attached to the fuselage-side coupler (46) near the fuselage-side coupler (46). A notification device (8) for notifying the worker of the non-wearing of the cap (72) by the operation of the sensor (92).
8) An apparatus for preventing a protective cap from being attached to an electric cable coupler provided with (89).