JPH068115U - Tractor safety device - Google Patents

Abstract

(57) [Summary] [Purpose] When the safety frame mounted on the tractor is erected from a fallen state, a predetermined operation can be performed. In a tractor in which a body is equipped with a safety frame 1 that is rotatable from a standing state to a falling state, when the safety frame 1 is rotated to the falling side, the interlocking rod 2 is operated in one direction or the switch 3 It is configured so that it can be interlocked so that it can be turned off, and the interlocking rod 2
Is configured so that the sub-fluctuation lever 4 is interlocked to switch to the low speed side, or the switch 3 is turned off to switch the engine starter switch to the off state, or the switch cannot be shifted to high speed. Is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tractor safety device equipped with a safety frame capable of safely protecting an operator in the case where a machine body falls over.

[0002]

[Prior art]

 Conventionally, it has been known to equip a tractor with a safety frame that is rotatable from an upright state to a tilted state, as seen in Japanese Patent Application No. 4-15705 already filed.

[0003]

[Problems to be solved by the device]

 However, if the safety frame is laid down while running or working on the road, the safety frame fails to function and is dangerous if the aircraft falls.

[0004]

[Means for Solving the Problems]

 The present invention solves such a problem and has a safety structure in which a predetermined operation cannot be performed unless the safety frame is erected.Therefore, when the safety frame is turned down, the interlocking rod is operated in one direction. It is configured so that it can be operated or the switch can be turned off.In addition, the interlocking rod can be linked so as to switch the auxiliary transmission lever to the low speed side, or the switch can be turned off to switch the engine starter. It is configured such that the gear is turned off or the gear cannot be shifted to a high speed by operating a switch.

[0005]

[Action]

 Therefore, when the safety frame is turned to the down side, the sub-shift lever can be switched to the low speed side by the interlocking rod, or the switch can be turned off to operate automatically. However, if the switch is a safety switch that pulls the switch of the engine starter, it will not be possible to start the engine, or With a structure that uses an electromagnetic valve and a hydraulic clutch for the transmission, it is possible to prevent shifting to a high speed gear by turning off the switch.

[0006]

【Example】

 1 to 4, FIG. 2 shows a side view of the tractor, which is equipped with both front wheels 5, both rear wheels 6, a handle 7, a seat 8 and the like, and a main transmission lever 10 is provided on the upper front side of the rear case 9. Further, the auxiliary shift lever 4 is provided, and brackets 12, 12 having a U-shaped cross section are fixedly provided on the upper portions of the stays 11, 11 extending from both sides of the rear case 9 to both rear sides of the seat 8, respectively. The lower ends of both ends of the portal-shaped safety frame 1 are rotatably attached to both brackets 12 through the support shafts 13 and 13 of the bolts and nuts. In the lower part, three lateral holes 15 into which the knock pins 14 and 14 to be fitted to the brackets 12 and 12 can be respectively inserted are formed, and the safety frame 1 can be erected or tilted backward to be locked. Sea urchin to configure.

A rear end portion of the interlocking rod 2 is pivotally connected to a pin 16 projecting inward of the safety frame 1 which is an upper side portion of the support shaft 13, and a front end portion of the interlocking rod 2 is connected. , It is pivotally connected to the pin 17 provided on the auxiliary shift lever 4 described above, but when the safety frame 1 is tilted backward, pull the auxiliary shift lever 4 rearward with the interlocking rod 2 so that it cannot be operated to the high speed side. It can be locked and configured.

FIG. 5 shows another embodiment. On the upper part of the bracket 12 on one side, there is provided a switch 3 which comes into contact with the safety frame 1 when it stands up and operates to be turned off. A safety switch that restrains the switch of the starter, equipped with a release button 3a, and a tractor that uses an electromagnetic valve and a hydraulic clutch for the transmission does not enter the high speed gear when the switch 3 is turned off. To configure.

Therefore, as shown in FIGS. 1 to 3, when the safety frame 1 is erected and locked, the auxiliary gear shift lever 4 is pushed by the interlocking rod 2 to enter the high speed side. If the tip of the rod 2 is removed from the pin 17, the gear shifting operation can be performed even on the low speed side, and with the pin 17 connected, the safety frame 1 is tilted backward as shown in FIG. When the vehicle is kept, the sub-gear lever 4 is pulled to the low speed side by the rotation of the safety frame 1. When traveling on the road or working in the field in that state, put the sub-gear lever 4 to the high speed side. You will not be able to drive and you will be able to drive safely.

When the safety frame 1 is tilted rearward in such a manner, the switch 3 is turned off, and the switch 3 is a safety switch for the engine starter, so that the engine is started. In that case, the safety frame 1 must be erected, and if the transmission uses an electromagnetic valve and a hydraulic clutch, the switch 3 can be turned off to prevent shifting to a high speed gear. it can.

[0011]

[Effect of device]

 As described above, according to the present invention, when the safety frame 1 is turned to the tilting side, the interlocking rod 2 automatically shifts the auxiliary speed change lever 4 to the low speed side or the switch 3 is turned off. Therefore, even if you try to put the auxiliary transmission lever 4 on the high speed side while driving, you can not operate it, and if the switch 3 is a safety switch that controls the switch of the engine starter, It becomes impossible to start, or if the structure uses an electromagnetic valve and a hydraulic clutch for the mission, it becomes impossible to shift to a high speed gear by turning off the switch 3, so it will automatically become a safe driving state. Therefore, it is possible to set the safety frame 1 so that it can be operated in a predetermined manner when the safety frame 1 is stood upright. Becomes, it has the advantage that can be suitably implemented in a simple structure.

[Brief description of drawings]

FIG. 1 is a side view showing an essential part of an embodiment of the present invention.

FIG. 2 is a side view showing a tractor.

FIG. 3 is a rear view showing a rear side of a part of FIG.

FIG. 4 is a side view showing the operating state of FIG.

FIG. 5 is a side view showing another embodiment.

[Explanation of symbols]

 1 safety frame 2 interlocking rod 3 switch 4 auxiliary shift lever

Claims (2)

[Scope of utility model registration request] 1. A tractor in which a body is equipped with a safety frame 1 capable of rotating from a standing state to a falling state,
A safety device characterized in that when the safety frame 1 is turned down, the interlocking rod 2 is operated in one direction or the switch 3 is turned off. 2. The interlocking rod 2 is interlockingly linked so as to switch the auxiliary speed change lever 4 to a low speed side, or the switch 3 is turned off to turn off the switch of the engine starter, or the switch is operated to shift to high speed. The tractor safety device according to claim 1, wherein the tractor safety device is disabled.