JPS6119613Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a combine harvester equipped with an alarm device.

Generally, combine harvesters have a threshing device on the top of the machine with a running device, and a
A reaping device is provided to be movable up and down relative to the machine body, and the cutting height of the grain culm is adjusted by moving the reaping device up and down.

Incidentally, when the combine harvester is to be repaired or inspected, the repair or inspection may be carried out with the reaping device moved upward and the key switch kept on. At this time, if you forget to lock the reaping device and perform a repair inspection, the rotatable part may fall if the manual operation lever or automatic control switch of the reaping device is operated by mistake. , is extremely dangerous.

Therefore, the inventor of the present invention installed an alarm device in a connection circuit that connects the key switch, a switch that detects the upward movement of the reaping device, and a switch that is linked to the locking device of the reaping device. When the reaping device is moved up and the key switch is left on, and the reaping device is not locked by the locking device, that is, when the reaping device is moved up for repairs or inspections, etc., the reaping device is operated with the manual operation lever or The idea was to activate the alarm device to issue an alarm when there is a danger of descent due to a malfunction of the automatic control switch.

However, when the combine harvester is moving for work, for example when moving between fields, there are cases where the key switch is left on and the reaping device is moved upward without locking. This is extremely inconvenient because the alarm is activated even when the combine harvester is operating normally.

This invention was devised in view of the above-mentioned problems, and when the combine harvester is being operated normally, the alarm is not issued, and when the combine harvester is being repaired or inspected, the reaping device is raised and the key switch is turned on. If you forget to lock the reaping device while it is left on, that is, when there is a danger that the reaping device will fall and cause an accident resulting in injury or death, the alarm will be issued for the first time, allowing for safe repairs and inspections. This is how it was done.

More specifically, the reaping device is configured to move up and down with respect to the machine body to adjust the cutting height of the grain culm, and this reaping device is provided with a locking device that locks the vertical movement, while the device is mounted on the machine body. a first detection device for detecting no-load operation of the prime mover; a second detection device for detecting the upward movement of the reaping device; and a third detection device for detecting an unlocked vertical movement of the reaping device by the locking device. The present invention is characterized in that it is provided with an alarm device that issues an alarm only when all of the first, second, and third detection devices sense the detection device.

The present invention will be explained below with reference to embodiments shown in the drawings.

In the figure, reference numeral 1 denotes the body of a combine harvester, which is equipped with a traveling device 2 at the bottom, a threshing device 3 at the top, and a reaping device 4 at the front of the body 1.
Furthermore, a prime mover 5 is mounted on the body 1 to drive various devices of the combine harvester.

However, in the combine, the aircraft 1 and
A hydraulic lifting device 6 consisting of a cylinder 6a and a piston 6b is interposed between the support frame 4a of the reaping device 4, and the lifting device 6 moves the reaping device 4 up and down to adjust its cutting height. At the same time, there is a cylinder 6a near this lifting device 6.
The second switch comprises a second switch that operates on and off by contact with the outer wall of the reaping device 4 to detect the position of the reaping device 4.
A detection device (hereinafter referred to as a second switch) 7 is installed, and when the lifting device 6 moves the reaping device 4 up to a predetermined height, that is, when the cylinder 6a of the lifting device 6 moves upward relative to the piston 6b. When the second switch 7 is removed from the outer wall of the cylinder 6a,
is moved away from the switch 7, and the normally open contact 7a of the switch 7 is turned on.

Also, a support frame 4 for the machine body 1 and the reaping device 4
A locking device 8 consisting of a fixed frame 8a fixed upward to the body 1 and a swinging arm 8b swingably attached to the frame 4a is interposed between the lifting device 6 and the lifting device 6. When the reaping device 4 is moved up to a predetermined height, the arm 8b is engaged with the fixed frame 8a by swinging the lock lever 10, which is erected together with the operating levers on the operating section 9 of the combine harvester. At the same time, a third detection switch is provided inside the upper end of the fixed frame 8a to detect the locked state of the reaping device 4 by being turned on and off by the arm 8b. Device (hereinafter referred to as the third switch)
11, and when the arm 8b is engaged with the fixed frame 8a, that is, when the reaping device 4 is locked, the third switch 11 is operated to turn off the normally closed contact 11a of the switch 11, Further, when the reaping device 4 is unlocked, the normally closed contact 11a of the switch 11 is turned on.

Furthermore, a first detection device (hereinafter referred to as a first switch) 12 is connected to the prime mover 5, which is a first switch that turns on and off depending on the rotation speed of the prime mover.

and the first, second and third switches 12, 7,
11 are wired in series as shown in FIG. 2 to form an alarm circuit.

That is, it is formed into a connection circuit 16 that connects the power supply 13, the key switch 14, and an alarm device 15 such as an alarm buzzer or an alarm lamp, and the third and second
Normally open contact 7a and normally closed contact 1 of switches 7 and 11
1a in series, and the first switch 12 is interposed on the output side of the alarm device 15, and the circuit 16 is closed by the ON operation of each of these switches 7, 11, and 12, and the alarm device 15 to activate it.

Further, the connection circuit 16 is provided with a reed switch 18 which is turned on by a magnet 17 disposed around the rotating part of the prime mover 5, and a rotation detector 21 for the prime mover 5, which is composed of an integrating circuit 19 and an amplifier 20. The rotation detector 21 is connected to the first
It is connected to switch 12.

The rotation detector 21 outputs an output when the prime mover 5 is rotating at high speed, that is, when the combine harvester is running for work, and stops the output from the comparator 22 to the first switch 12 to keep the switch 12 in the off state. to open the connection circuit 16, and also to open the prime mover 5.
When the predetermined rotation speed is not reached, such as when the engine is stopped or idling, the comparator 2 does not output any output.
2 to the first switch 12, and the switch 12 is turned on to close the connection circuit 16.

Further, the on-delay circuit 23 includes a comparator 22
This is to delay the output from the harvester for a certain period of time and input it to the first switch 12. Normally, when repairing or inspecting a combine harvester, after raising and locking the reaping device 4, the output from the prime mover 5 is That is, after turning on the second switch 7 and turning off the third switch 11, the first switch 7 is turned on and the third switch 11 is turned off.
The switch 12 is turned on, and at this time the third switch 11 is turned off, so the alarm device 1
5 does not operate, but some operators may move the reaping device 4 upward to stop the prime mover 5, and then lock the reaping device 4. In other words, the second and second switches 11, It is conceivable to turn off the third switch 12 while the switch 7 is turned on, and in this case, the connection circuit 16 is closed and the alarm device 15 is activated until the reaping device 4 is locked. The connection circuit 16 is kept open until a certain period of time has elapsed after the prime mover 5 has stopped, thereby preventing the alarm device 15 from being activated immediately.

The present invention is constructed as described above, and allows repair and inspection of the combine harvester to be carried out by moving the reaping device 4 upward, keeping the key switch 14 on, and stopping or rotating the prime mover 5 at low speed. In this case, if you forget to lock the reaping device 4 with the locking device 8, that is, if there is a risk that the reaping device 4 may fall due to malfunction of its manual operation lever or automatic control switch, resulting in personal injury, In Figure 2, key switch 14 and
and the third switches 7 and 11 are turned on, and after a certain period of time has elapsed from this state, the first switch 12 is turned on, and the power supply 13 and the alarm device 1 are turned on.
5 is closed, and the alarm device 15 issues an alarm.

In the above case, the locking device 8 locks the reaping device 4.
When the alarm device 1 is locked, the third switch 11 is turned off and the connection circuit 16 is opened.
Further, when the prime mover 5 is rotating at high speed, that is, when the combine harvester is running for work, the first switch 12 is turned off, so the alarm device 15 is not activated.

As explained above, in this invention, if the combine harvester is repaired or inspected with the reaping device raised and the key switch left on, the alarm system will issue an alarm, making it easier to carry out work. This system alerts the operator to the danger and prevents accidents resulting in injury or death due to lowering of the reaping equipment.Also, if the reaping equipment is raised with the key switch turned on while the combine harvester is being operated, a warning is provided. There is no need to activate the device, so there is no need to alarm the operator by alarming him or her at an unnecessary time.

[Brief explanation of the drawing]

Figure 1 is a side view of the combine harvester according to the present invention;
FIG. 2 is a control circuit diagram of the alarm device. 1... Airframe, 2... Traveling device, 3... Threshing device, 4... Reaping device, 5... Prime mover, 7... Second
Switch, 8... Lock device, 11... Third switch, 12... First switch, 13... Power supply, 1
5...Alarm device, 16...Connection circuit.

Claims (1)

[Scope of utility model registration request] A combine harvester is provided with a reaping device in the front part of a machine body having a traveling device and a threshing device in the upper part. To the reaping device,
A locking device is provided to lock the vertical movement of the mower, and a first detecting device detects no-load operation of the prime mover mounted on the mower, a second detecting device detects the upward movement of the reaping device, and the reaping device uses the locking device. A third detection device for sensing the vertical movement unlocked state of the device is provided, and an alarm device is provided that issues an alarm only when all of the first, second, and third detection devices detect the device. Combine harvester with alarm device.