JPH0564468U - Safety switch layout structure for mobile agricultural machinery - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To protect the safety switch of mobile agricultural machinery from wind, rain, mud, etc. and improve durability. A guide plate 19 is provided on the rear surface of the transmission panel 9, and an operating plate 18 having a protrusion 18a slidable up and down is provided in a gap between the transmission panel 9 and the guide plate 19, and the protrusion 18a is provided. When the speed change lever 8 is moved to the neutral position N, the end portion of the operating plate 18 is pressed by the end surface of the lever 8 so that the switch portion 1 at the tip of the safety switch 14 is pressed.
7 is pushed by the protrusion 18a to push the safety switch 14
Is operated to turn on the engine 3 starting circuit.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safety switch arrangement structure in an engine starting safety device of a mobile agricultural machine such as a cultivator, a reaper, and a rice transplanter.

[0002]

[Prior Art]

 As shown in FIG. 6, a conventional safety switch is generally arranged in the vicinity of a clutch lever B provided on a handle of a cultivator, and when the clutch lever B is engaged / disengaged, the safety switch A is engaged at the lever disengagement position. It was known to operate.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, since the safety switch A for turning on and off the clutch by the turning operation of the lever B is exposed to the outside, the switch portion of the safety switch A is affected by wind, rain, mud and the like. As a result, not only the durability of the safety switch A is deteriorated, but also contact failure may occur, so that the function of the safety switch A cannot be fully exerted. In addition, there is a risk that it may come into contact with other objects and may be damaged.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the technical means adopted by the present invention is to dispose a speed change panel having a guide groove having a speed change position in the direction of a straight line in the body of a mobile agricultural machine, and to guide the speed change panel. When a gear shift lever is inserted between the grooves, an operating plate formed so that a neutral position is provided between the gear shift positions and one end projects into the guide groove at the neutral position is inserted into the guide groove on the rear surface of the gear shift panel. The shift lever is slidably provided at right angles to the shift direction, and a safety switch fixed on the rear surface of the shift panel is faced to a position facing the protrusion projecting on the operation plate, and the operation plate is Part is biased to project into the guide groove, and the projecting amount of the operating plate is restricted to a certain range.When the shift lever is operated to the neutral position, the shift lever is operated in the neutral position. Interlock By pushing one end of the operating plate and operating it in the direction of retracting from the guide groove, the switch part of the safety switch is pressed by the protrusion of the operating plate and the engine starting circuit is turned "ON". It is characterized by being configured in this way.

[0005]

[Action]

 Therefore, according to the present invention, when the engine is started, first, by operating the speed change lever to the neutral position, the end portion of the operation plate is slid along the speed change panel and the operation plate is moved to the speed change guide groove. By retracting the switch from the neutral position and pressing the switch part of the safety switch with the protrusion of the operating plate, the switch is closed to the "ON" state. When the key switch is turned to the "ST-ON" position in this state, the engine start circuit is closed, current flows from the battery to the start circuit, the starter circuit is driven, and the engine starts.

[0006]

【Example】

 An embodiment in which the present invention is applied to a cultivator will be described below with reference to FIGS. 1 to 7. The present invention is a local improvement of the tiller described in the specification of Japanese Patent Application No. 63-63032, and the unexplained parts are the contents and drawings described in these applications. Should be understood by quoting. The cultivator 1 includes a mission case 2, an engine 3, traveling wheels 4, a rotary 5 and a steering wheel 6 which form a body frame. The mission case 2 is composed of a large-sized member made of a press-formed iron plate, and an engine frame 3a for mounting the engine 3 is fixed to the front of the mission case. A handle frame 7 is attached so as to extend toward.

A shift lever 8 extends from the upper part of the transmission case 2 along the handle frame 7, the key switch 20 and the handle 6, and the shift lever 8 is formed integrally with the handle frame 7. It is inserted and guided in the guide groove 10 of the transmission panel 9. As shown in FIG. 2, the guide groove 10 of the transmission panel 9 extends from the left end to the right in a linear direction in a reverse position R, a work neutral position N ′, a forward first speed position F 1, a neutral position N, and a forward position. Rotation of the rotary 5 which is a working machine including a traveling gear position having a second speed position F2, and having a reverse rotation position C and a forward rotation position S in the vertical (up and down) direction from the neutral working position N '. A direction change step is formed.

Further, a fuel tank 11 is arranged above the rear portion of the engine 3, and the transmission panel 9 has left and right side plates 9b bent to the front side of the machine body to have a U-shaped cross section. The rigidity of the support is enhanced, and it also functions as a cover for the air cleaner 12 behind the engine 3. Further, an upper front portion of the engine 3 is covered with a bonnet cover 13, and the transmission panel 9 integrated with the fuel tank 11 and the top plate portion 9a covers the upper rear portion and the rear portion of the engine 3 together with the engine. Consists of a neat design in which the 3 is covered.

On the rear surface of the transmission panel 9, a safety switch 14 located above the rear surface of the neutral position N of the guide groove 10 of the transmission panel 9 is attached to the transmission panel 9 via a support plate 16 by a mounting bolt 15. It is attached to the side plate 9b. Further, the switch portion 17 of the safety switch 14 is of a type in which a built-in spring (not shown) projects and urges it outward, and an operating plate 18 for pressing the switch portion 17 is used. The transmission panel 9 and a guide plate 19 fixed to the rear surface of the transmission panel 9 are vertically slidably provided in a gap.

The guide plate 19 is inserted into a long hole 18b of the actuating plate 18 which will be described later, and a claw portion 19a for restricting downward movement of the actuating plate 18 is formed by bending in contact with an end of the long hole 18b. Has been done. The claw portion 19a is formed by forming a horseshoe-shaped hole 21 in the guide plate 19 and bending the claw portion 19a formed inside the hole 21a upward. Guide portions 18c, 18c such as inclined surfaces or curved surfaces are formed at the left and right corners of the lower end of the operating plate 18, and a tongue for pressing the switch portion 17 is provided in the middle of the operating plate 18. The piece-shaped protrusion 18a is formed by bending. Further, a long hole 18b is provided in the upper portion of the operating plate 18, the tip of the claw portion 19a of the guide plate 19 is hooked at the end of the long hole 18b, and the lower end of the operating plate 18 is The shift panel 9 is regulated so as not to be lowered into the guide groove 10 more than a predetermined amount. Note that, in FIG. 1, the safety switch 14 is in the “OFF” state when the protrusion 18a is in the solid line state, and the safety switch 14 is in the “ON” state when the protrusion 18a moves up to the chain line state. ..

It should be noted that the protrusion 18a that comes into contact with the switch portion 17 of the safety switch 14 may be fixed separately from the operating plate 18, but as in the embodiment of the present invention, the protrusion 18a is bent. If it is formed integrally with the actuation plate 18 by forming, there is an advantage that steps such as welding and strain relief are not necessary and can be manufactured at low cost.

FIG. 7 is a circuit diagram of the engine start safety device, in which the switch portion 17 of the safety switch 14 is turned “ON” by operating the shift lever 8 to the neutral position N, and the key switch 20 is turned “OFF”. By operating "ST-ON", the ST terminal circuit is closed, the magnet switch 21 is turned "ON", and current flows from the battery 23 to the starter circuit 22.

Since the present embodiment has the above-described structure, when the shift lever 8 is switched and moved along the guide groove 10 to the neutral position N when the engine 3 is started, the operating plate 18 moves. The lower end inclined portion 18c is pushed up so as to be rubbed up by the end face of the speed change lever 8, the operating plate 18 is moved from the solid line position to the chain line position as shown in FIGS. 1 and 2, and the protrusion 18a of the operating plate 18 is moved to the safety position. The switch portion 17 of the switch 14 is changed from "OFF" to "ON", and in that state, the key switch is changed from "OFF" to "ST-ON" to change the start circuit of the engine 3 to "ON". Engine 3 can be started.

Further, when the speed change lever 8 is located at a speed change position F1, F2, R other than the neutral position N, the operating plate 18 acts on the protrusion biasing force of the switch portion 17 of the safety switch 14 and the operating plate 18. It is possible to prevent a sudden start when the engine 3 is started by returning to the descending position due to its own weight and setting the safety switch 14 to "OFF". The descending return operation of the operating plate 18 also uses the biasing force of the protrusion of the switch portion 17, and has an advantage that a special return assisting member can be omitted. The lowering return position of the operating plate 18 is regulated to a predetermined amount by the long hole 18b of the operating plate 18 and the claw portion 19a of the guide plate 19 as described above, and it is provided on both sides of the lower end of the operating plate 18. The operating plate 18 can be pushed up smoothly when the speed change lever 8 is operated from the right and left speed change positions F1 and F2 of the neutral position N to the neutral position N in combination with the configuration of the inclined portions 18c and 18c.

The present invention is not limited to tillers, but can be applied to other mobile agricultural machines such as rice transplanters and reapers.

[0016]

[Effect of the device]

 In short, according to the present invention, a speed change panel having a guide groove having a speed change position is arranged in a straight line in a machine body of a mobile agricultural machine, and a speed change lever is inserted between the guide grooves of the speed change panel. The shift plate is provided with a neutral position between the shift positions so that one end projects into the guide groove at the neutral position and is orthogonal to the shift direction of the shift lever inserted into the guide groove on the rear surface of the shift panel. The safety switch fixed on the rear surface of the transmission panel is faced to the position opposite to the protrusion protruding on the operating plate, and one end of the operating plate is projected into the guide groove. When the gear shift lever is operated to the neutral position, the one end of the actuating plate is linked to the gear shift lever when the gear shift lever is operated to the neutral position. Press the part, By operating the moving plate in the direction of withdrawing from the guide groove, the switch part of the safety switch is pressed by the protrusion of the operating plate to turn on the engine starting circuit. Not only can the space formed on the back side be effectively utilized for mounting, but since the safety switch is protected by the transmission panel, the switch part of the safety switch is less likely to be affected by wind and rain or mud. In addition, it is possible to prevent damage to the other side due to contact with other objects, greatly improving the durability of the switch, and since the shift guide groove is formed in the shift panel that is opened in the straight direction, the safety switch It is possible to smoothly operate the operating plate that operates the gear shift neutral position. Also, since the safety switch and operating plate are mounted on the back side of the transmission panel through which the transmission lever is inserted, it is possible to prevent the relative positions of these members from changing and to ensure reliable operation over many years. Moreover, since the bolts for mounting the safety switch do not come out, it has a practical value of improving the external design.

[Brief description of drawings]

FIG. 1 is a side view of a main part.

FIG. 2 is a front view of a transmission panel.

FIG. 3 is a view on arrow A of the above.

FIG. 4 is a view on arrow B of the above.

FIG. 5 is an overall side view of the cultivator.

FIG. 6 is a conventional safety switch.

FIG. 7 is a circuit diagram of an engine starting safety device.

[Explanation of symbols]

 1 Cultivator 2 Mission Case 3 Engine 4 Wheels 5 Rotary 6 Handle 8 Shift Lever 9 Shift Panel 14 Safety Switch 18 Actuator 18a Projection

Claims (1)

[Scope of utility model registration request] 1. A shift panel having a guide groove having a shift position in a linear direction is provided on a body of a mobile agricultural machine,
When a gearshift lever is inserted between the guide grooves of the gearshift panel, a neutral position is provided between the gearshift positions, and an operating plate formed so that one end projects into the guide groove at the neutral position has the guide plate on the rear surface of the gearshift panel. The gearshift lever inserted through the groove is provided slidably in a direction orthogonal to the gearshift direction, and a safety switch fixedly provided on the rear surface of the gearshift panel is faced to a position facing the protrusion projecting on the operating plate, and The actuating plate is configured to urge one end of the actuating plate to project into the guide groove, and the projecting amount of the actuating plate is regulated within a certain range. When the shift lever is operated to the neutral position, the shift lever is neutralized. Pressing one end of the operating plate in conjunction with position operation,
A mobile agricultural machine characterized in that by operating the operating plate in a direction retracting from the guide groove, the switch portion of the safety switch is pressed by the protrusion of the operating plate to turn on the engine starting circuit. Safety switch layout structure in.