JPH03280805A - Working vehicle - Google Patents

Abstract

PURPOSE:To prevent occurrence of trouble and damage related to flexible communicating member by operating a means of stopping an engine loaded on a machine body when an unconnected state is detected in a connected state of the flexible communicating member by an unconnected state detecting sensor. CONSTITUTION:A connecting part B is provided with a sensor 26 of detecting an unconnected state of link mechanism 5 of machine body and an operation device 9. When an unconnected state is detected by the sensor 26 in a connected state of a flexible communicating member such as electric cord to communicate a device at the machine body side with a device in the operation device side, a means of stopping an engine is worked.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is to connect a work device that can be raised and lowered to a machine body in a detachable manner, and to flexibly connect equipment on the machine body side and equipment on the work device side. This invention relates to a work vehicle connected by a sex-linking member.

[Conventional technology]

Flexible linking members that connect related equipment on the machine body and work equipment include electrical cords, operating wires, hydraulic hoses, etc., and the work equipment must be removed from the machine for storage or replacement of the work equipment. When moving the machine, sometimes people forget to separate the flexible linking member, and if they forget to do this and move the machine, they may damage the flexible linking member or drag the working equipment. There was a risk of it falling over.

Therefore, as an example of means for preventing such problems, if the flexible linking member is an electrical cord, for example, as shown in Japanese Utility Model Application No. 62-169905, At the connection part of the equipment, electrical wire terminals are formed on both the work vehicle side and the work equipment side, so that when the work equipment is attached or removed, electrical connection and separation between the electrical equipment on the work vehicle side and the work equipment side is made. There was something configured.

[Problem to be solved by the invention]

Although the above means is effective in preventing the electrical cord from being cut, there are some difficulties in practical use. In other words, some errors are allowed, and attachment and detachment work must be carried out at the same time at the connection parts of the working equipment, which are subjected to large forces when attaching and detaching, and at the connection parts of electrical cords, which require strict connection conditions and are prone to failure due to external forces. As a result, there have been some problems in practical use, such as poor contact due to exposed contacts at the connection, and an increased frequency of connection failure due to the mechanical load applied when attaching and detaching the working device.

In view of the above-mentioned circumstances, an object of the present invention is to prevent, by a practical method, the occurrence of failures and damages related to flexible linking members that link equipment on the work vehicle side and equipment on the work equipment side.

[Means to solve the problem]

A characteristic configuration of the present invention for achieving the above object includes providing a sensor in a connecting portion of the working device to detect that the working device is in a disconnected state with respect to the machine body;
There is provided an engine stop means for automatically stopping the engine mounted on the aircraft when the sensor detects a disconnected state while the flexible linking member is connected.

[For production]

According to the above configuration, when the working device is replaced with another working device or when the working device is removed and driven on the road, the sensor detects the uncoupled state of the working device while the flexible linking member is connected. When detected, the engine stop means is activated to automatically stop the engine.

〔Effect of the invention〕

Therefore, according to the present invention, it is possible to prevent the aircraft from moving with the flexible linking member connected, and to reliably avoid damage to the flexible linking member. In particular, since the connection of the flexible linking member is made independent of the connection of the working device, the durability, precision, and sealing performance suitable for the linkage type can be arbitrarily set and implemented, which is practically effective.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Fig. 4, a control section (1) and front and rear wheels (2),
An engine (E) is mounted on the front part of the fuselage (A) equipped with (3), and a link mechanism (5) that can be driven up and down by a hydraulic cylinder (4) is connected to the rear end of the fuselage (A). Link mechanism (
5) Multi-row seedling stand (6) and float (7) at the rear end
and a four-row riding rice transplanter, which is one of the working machines, by detachably connecting a seedling planting device (9) as a working device equipped with a planting mechanism (8) to the link mechanism (5). has been configured.

As shown in FIGS. 3 and 4, a marker device (M) is provided at the lower front of the fuselage (A). This marker device (M) is used to leave a space for full-row planting connecting the headlands on both sides of the field after reciprocating planting at the edge of the ridge during the first planting process. ) A marker arm (10), which can be bent at the angle of 100 mm, is attached to a pair of left and right rotational support sections (11) at the lower front of the fuselage so that it can slide through it. During normal planting, the marker arm (10) is folded in as shown in Figure 3 (a).
If the marker arm (11) is held in a retracted position with both ends fixedly supported by the rotary support part (11), and if the above space is to be left during the first planting process, the marker arm ( Move the center part (10a) of 10) to the straight line connecting the left and right rotation support parts (11) and extend it in a straight line from side to side, and move the marker arm (10) in either the left or right direction while keeping it in the straight line extended state. By sliding the marker arm (lO) to its limit as far as it will go, and performing the first planting process by placing the tip of the marker arm (lO) along the ridge, you can create a space for planting 4 rows on the ridge side (
S) can remain.

Next, the structure of the connecting portion (B) between the link mechanism (5) and the seedling planting device (9) will be explained.

As shown in FIG. 1, the connecting portion (B) has a link mechanism (
5) A vertical link (12) at the rear end, a hook (13) projecting backward from the top of this, a connecting frame (14) on the side of the seedling planting device (9), and a connecting frame (14) provided with The hook (13) is engaged with the engagement hole (16) formed in the upper part of the connection frame (14), and the locking tool (15) is connected to the vertical link ( The seedling planting device (9) is removably connected to the rear end of the link mechanism (5) by being hooked to the lock pin (17) of the link mechanism (5).

As shown in Fig. 2, a limit switch (Sw) is installed on the seedling planting device (9) side as a seedling remaining amount sensor for each row of the seedling stand (6), and a limit switch (Sw) is installed on the side of the seedling planting device (9). A power source (B) and an alarm circuit (20) provided for the operation are connected by an electric cord (an example of a flexible linking member) (21). In addition, in the figure (
22) is a notification mechanism such as a buzzer or lamp connected to the alarm circuit (20).

A connector (C) is interposed in the middle of the electrical cord (21) to disconnect the electrical system when the seedling planting device (9) is removed from the body (A). And this connector (C
The female joint (Cb) belonging to the seedling planting device (9) side of ) is provided with a pair of mutually electrically connected terminals (23a), (23b), and the terminals (23a), (23b)
) of the connecting pins (24a) and (24b) provided on the female joint (Ca) belonging to the fuselage (A) side.
A relay (Ry) that controls the engine stop circuit (25) is connected to a), and the other connecting pin (24b) is connected to a normally closed terminal as a sensor for detecting the connected state of the connecting portion (B). A type switch (26) is connected.

As shown in Fig. 1, this switch (26) is attached to the vertical link (12) of the link mechanism (5) and is pressed and operated by the connecting frame (14) of the seedling planting device (9). The circuit is open when the seedling planting device is connected, and closed when the seedling planting device is disconnected.

Therefore, when the seedling planting device (9) is removed from the link mechanism (5), if the connector (C) remains connected, the relay (Ry) is energized by the closing of the switch (26) and the engine stop circuit is turned on. (25) is activated. In other words, it is impossible to run the aircraft (A) alone with the connector (C) connected.

Also, the seedling planting device (9) is removed and the connector (C
) are separated, the relay (Ry) and engine stop port (25) will not operate even when the switch (26) is closed, allowing the aircraft (A) to travel.

In the example, the flexible linking member (21) extending between the machine body (A) and the working device (9) is an electric cord, but the connection part or coupling of the operating wire or hydraulic hose may have a similar function. It can also be implemented by adding . In addition, as the sensor (26) for detecting the connected state of the connecting portion (B), various detection means such as a proximity switch, a reed switch, a photo-inclination converter, etc. can be used in addition to the limit switch.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the working vehicle according to the present invention, FIG. 1 is a partially cutaway side view showing the connecting part of the seedling planting device, FIG. 2 is an electric circuit diagram, and FIG. 3 ((), ( 0) is a schematic plan view of the marker device, (a) shows the state of normal planting, and (b) shows the state of ridge planting. Also, Fig. 4 is an overall side view. (9) ...Working device, (21) ...Flexible linking member, (26) ...Sensor, (A)
... Aircraft, (B) ... Connection L (E)
······engine.

Claims (1)

[Claims] A work device (9) that can be raised and lowered is detachably connected to the machine body (A), and equipment on the machine body (A) side and equipment on the work device (9) side are connected by a flexible linking member (21). In the connected working vehicle, a sensor (26) that detects that the working device (9) is in a disconnected state with respect to the machine body (A) is connected to the connecting portion (B) of the working device (9). ) and an engine stop means that automatically stops the aircraft-mounted engine (E) when the sensor (26) detects a disconnected state while the flexible linking member (21) is connected. car.