JPH0719071U - Safety frame in agricultural work machine - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of this plan is to obtain a safety frame for agricultural work machines that does not pose a danger during running. [Structure] This is a safety frame for agricultural work machines in which the starter motor does not work when the safety frame is in an inverted position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This proposal relates to a safety frame for agricultural work machines such as tractors.

[0002]

[Prior art]

 Conventionally, a safety frame is provided on the seat back of the tractor.

[0003]

[Problems to be solved by the device]

 Most of the safety frames at the back of the seats that have been installed in tractors have been installed with the safety frame standing upright, and a foldable type is also used for entering and leaving the barn. By the way, it is safe to work with the safety frame set up because the purpose of the safety frame is to protect the back of the worker, but sometimes the engine is started without forgetting to set up the safety frame. In such cases, it is dangerous. The present invention has been devised in view of the above points, and is intended to obtain a safety frame for an agricultural work machine that does not pose a danger during traveling.

[0004]

[Means for Solving the Problems]

 In order to achieve the above objectives, this plan provides the following safety frames for agricultural machinery. In other words, it is a safety frame for agricultural work machines in which a safety switch that closes the standing-up circuit of the safety frame and interlocks with the safety frame so as not to close the circuit in the case of a fall is provided in the drive circuit of the engine cell tarter.

[0005]

[Action]

 If the safety frame is upright, the safety switch is on and the engine's cell motor operates, but if the safety frame is upside down, the safety switch is off and the engine's cell motor does not work.

[0006]

【Example】

 Embodiments shown in the drawings will be described below. FIG. 3 shows a tractor having a front wheel (3) at the front of a frame (2) carrying an engine (1) and a rear wheel (4) at the rear of the frame (2). (5) is the power steering of the steering column (6), and (7) is the seat. There is a safety frame (8) on the back of the seat (7) as described above. This plan relates to the safety frame (8) provided on the back of the seat (7) in the tractor as described above, and the engine cell motor works when the safety frame stands up, but does not work when the safety frame falls down. Is.

FIG. 1 shows a drive circuit for a starter motor, in which (9) is the starter motor and (10) is a battery as its power source. Reference numeral (11) is a key switch, which is connected to the safety switch (12) of the clutch, and the safety switch (13) of the safety frame is connected in series with the safety switch (12) of the clutch. The safety switch (13) is provided on the side of the rotating shaft (14) of the body of the safety frame (8) as shown in Fig. 2. When the safety frame (8) is upright, the safety frame (8) is When the end of the safety frame (8) comes into contact with the safety switch (13) and the safety frame (8) falls down, the end of the safety frame (8) moves away from the safety switch (13) as shown by the dotted line in FIG. A normally open switch that turns off the switch is used. (15) is a pin hole of the safety frame (8), which is a pin inserted between the corresponding pin hole of the body (16) at the time of standing and the pin hole at the time of standing upright and standing upside down. And are to be maintained. Further, a release switch (17) which can prevent the starter motor (9) from operating regardless of whether the safety switch of the safety frame is operated is additionally provided.

Since the present invention is configured as described above, when the safety frame (8) stands up as shown by the solid line in FIG. 2, the safety switch (13) is turned on and the circuit of the starter motor (9) is turned on. Since it has been opened, the key switch (11) is turned on and the safety switch (12) of the clutch is depressed to activate the starter motor (9). On the other hand, when the safety frame (8) is upside down as shown by the dotted line in FIG. 2, the end of the safety frame (8) separates from the safety switch (13) and the safety switch (13) turns off, so the key switch (11) ) And the safety switch (12) of the clutch is stepped on, the cell motor (9) does not work. Therefore, the cell motor works only when the safety frame (8) stands up, so the worker is protected by the safety frame (8). There is no danger in driving. The release switch (17) can deactivate the cell motor (9) regardless of the state of the safety frame. The above is one embodiment of the present invention, and the design can be changed appropriately within the scope of the claims of the present invention.

[0009]

[Effect of device]

 In the case of this proposal, the starter motor does not work when the safety frame is upside down, so the safety frame does not run with the body down and there is no danger.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of the safety frame of the present invention.

FIG. 2 is an explanatory view of the upright and inverted state of the safety frame of the present invention.

FIG. 3 is a perspective view of a tractor

[Explanation of symbols]

 9 Starter motor 10 Power supply 11 Key switch 12 Safety switch for clutch 13 Safety switch for safety frame

Claims (1)

[Scope of utility model registration request] 1. A safety mechanism for an agricultural machine in which a safety switch is provided in a drive circuit of a starter motor of an engine so as to close a standing circuit of a safety frame and prevent the closed circuit of a safety frame from being closed. flame.