JPH01148118A - Safety device for mower - Google Patents

Abstract

PURPOSE:To prevent a mower from rotating in lifting thereof and improve safety of work, by stopping a tension arm with a stopper arm in lifting the mover and setting a belt converter to a state of disconnecting a clutch. CONSTITUTION:If a front power take-off(PTO) lever 16 is rotated in the direction of arrow, a wire 15 is pulled through an arm 17 connected to a rotation base (16a). The lower end (14a) of a tension arm 14 pivoted on a bracket 19 is then moved upward to rotate the tension arm 14 in the clockwise direction. A tension roller 20 presses a belt 21 to apply tension and a belt converter 13 is in a state of connecting a clutch. At this time, the rotation base (16a) is released from a switch 18 by rotation of the front PTO lever 16 to turn off the switch 18. A circuit of a lifting and lowering switch 6 is in a broken state. Thereby, when a mower 2 is rotated, lifting thereof is not caused at all even if the lifting and lowering switch 6 is turned on, since the circuit is broken by the switch 18.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a safety device for a mower of a tractor. This relates to a safety device that prevents the mower from rotating when ascending.

[Problems to be solved by the prior art and the invention] Conventionally, the mower device of this type of tractor transmits power from the front PTO shaft to the drive section of the mower via the belt converter.
It is formed like Ih-F. Turn on the rotation of the mower
To turn the belt converter off, operate the PTO lever to operate the tension arm and turn the belt converter off.
It was left in a "clutch man" or "clutch disengaged" state. Further, in order to raise and lower the mower device, a mower lifting motor is separately operated to pull up the link of the suspension device. As described above, since the mower device moves up and down and rotates independently, it may rise even when the mower is rotating, which is very dangerous. Therefore, a technical problem arises that must be solved in order to obtain a safe position to prevent the mower from rising when the mower is rotating.

[Problem that the invention seeks to solve]

This invention was proposed in view of the above-mentioned problems and as a solution to the problems, and in a mower equipment RK in which the drive unit VC force is transmitted from the front PTO shaft of the tractor via the belt converter, the belt converter is A stopper arm is rotatably provided near the tension arm, and one end of the stopper arm is connected to the front part of the mower, and a front PTO lever and a switch for the motor circuit for raising and lowering the mower are provided so that when the mower is raised, the stopper arm is connected to the mower. Lock the tension arm at and disengage the clutch of the belt converter.
Furthermore, it is an object of the present invention to provide a mower safety device characterized in that the mower lifting motor is turned off when the Freon PTO lever is turned on.

[Effect]

In this invention, a belt converter has a belt converter with a heel stop arm near the tension arm rotatably provided. One end of the stopper arm is connected to the front of the mower, so when the mower is rising, the stopper arm rotates around the support, and its tip connects to the belt of the belt converter and the tension. It is inserted between the arm. Therefore, the operation of the tension arm is locked, and the force of the front PTO shaft is not transmitted to the drive section of the mower. That is, when the mower is in a raised state, the front PTO lever is operated and the belt converter remains in a "clutch disengaged" state, and the mower does not rotate.

Furthermore, the front PTO lever is equipped with a switch for the mower lifting motor circuit, and by rotating the lever,
Since it can be turned on or off, if the lever is rotated in the direction of the clutch person to rotate the mower, the switch of the mower lifting motor circuit will be turned off. That is, the mower does not rise at all while it is rotating. Then.

This eliminates the risk of the mower rotating when it is raised, thereby increasing the safety of the work.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, conventionally known configurations will also be explained at the same time. In FIG. 1, reference numeral (1) is a tractor, and a mower (2) is provided under the floor of the tractor (1). A suspension system FE (3) composed of a combination of various links is attached to the upper surface of the mower (2), and the suspension system (3) is actuated by driving the lifting motor (4). The mower (2) is shaped like 5 so that it can be raised and lowered. Then, fix the lift switch (6) to an appropriate position on the operation panel (5) or the like where it can be easily operated.

The lifting motor (4) is turned on and off. or.

A front PTO shaft (8) protrudes in front of the engine (7), and a front frame (8) is located below the engine (7).
An input shaft (In) is pivotally connected to the front frame (9), and the rear end of this input shaft OI is connected to the mower (In) via a universal joint 0 and υ and a drive shaft az. 2) is connected to the drive unit 03.The front PT
The O-axis (8) and the input shaft α are connected by a belt converter a3, and one end of the wire Q51 is locked to the lower end (14a) of the tension arm I of the belt converter a3.

Also, connect the front PTO to the front Fs'r2 operation panel (5).
Attach the lever (161) and press this front PTO lever O.
Connect the pivoting base (16a>"% of e) with the arcuate arm qη, and lock the other end on the wire side to the arm Gη.

Further, a switch n~ is provided adjacent to the rotating base (1~), and is configured so that the switch 081 can be turned on or off by rotating and sweeping the PTO lever 116+.

Next, according to FIGS. 2 and 3, the belt converter 0
3 will be explained in more detail. The front frame (9)
A bracket 09 is welded to the input shaft (IQ), and as described above, the front PTO shaft (8) and the input shaft a are connected by a belt converter OJ.
A base portion of a tension arm 04 is rotatably pivoted at an appropriate position on the bracket 01.

Here, by pulling the wire 051 locked to the lower end (14a) of the tension arm α4, the tension arm 'J4kt rotates and the tension roller (2) presses the bell) +211. As a result, a tension force is applied to the belt Qυ, and the belt converter (131) becomes in the "clutch man" state, and the power of the front PTO shaft (8) is transmitted to the input shaft port 1 and is transmitted to the mower (2) via the drive shaft 02+.
) is transmitted to the drive unit ■. Further, a bracket (t23) is provided protruding from the front part of the front frame (9), and @ is rotatably pivotally connected to this bracket (@height support).

One end (24a) of the stopper arm @ extends rearward and is pivotally connected to the front part of the mower (2), and the other end of the stopper arm @ is curved upwards.
4b) protrudes forward.

Therefore, Figs. 2 and 3 show the state in which the mower has descended: ur:
, and - Belt converter 0 shows clutch train state B, the front PTO lever decoy is in the neutral position, and the 70 rotation base (16a) presses the switch open, as described above in FIG. The circuit of the lift switch (6) is in a connected state. Therefore, when the lift switch (6) is set to the "up position", the lift motor (4) rotates forward and the suspension device (3) was raised.

The mower (2) rises. At that time, following the rise of the mower (2), one end (?4a) of the stopper arm also rises.

Turn the stopper arm Q counterclockwise in Figure 2 @-
ru. Then, the tip end mm of the stopper arm (241) is inserted between the tension arm (14) and the belt Cυ.Therefore, even if the wire Q51 is pulled in this state.

The tension arm 04 is locked by the stopper arm (241) and cannot apply tension to the belt l'21+.In other words, when the mower (2) is in the ascending state, the front PTO lever aθ is operated. This belt converter 03 has a "clutch train" and more (
2) never rotates.

Also, in FIG. 2, when the PTO lever tIe is rotated in the direction of the arrow in the figure, the wire 09 is pulled through the arm 07 connected to the rotation base (IGa).

Then, in FIG. 3, the lower end (14a) of the tension arm I, which is pivotally connected to the bracket 119, moves upward, and v! Tension arm I rotates clockwise in the figure. Thus, the tension roller (2) presses the belt Qυ to apply tension, and the belt comparator 11 becomes in the "clutch man" state. At that time, by rotating the front PTO lever ae.

The 70-swivel base (16a) is disengaged from the switch socket, the switch is turned off, and the circuit of the lift switch (6) is cut off. Therefore, when the mower (2) is rotating, even if the lift switch (6) is turned on, the mower (2) will never rise because the circuit is cut off by the switch (18).

In this way, there is no risk of the mower turning over when it is rising, or rising when it is rotating;
It is possible to significantly improve the safety of tractor mower operations.

〔Effect of the invention〕

As described in detail in the above-mentioned embodiment, the present invention is explained in detail in 5 above. When the mower is moving up, the tension arm is locked by the stopper arm, so that the belt converter maintains the "clutch train" state. Also, when the mower is rotating by rotating the Freon) Pro lever.

A switch provided on the PTO lever disconnects the circuit of the lifting motor, and the lifting motor does not operate. Therefore, even if a worker accidentally rotates the mower while the mower is rising, the rotation of the mower can be prevented, and the mower can also be prevented from rising while the mower is rotating. do. Therefore,
The safety and efficiency of tractor mower work can be significantly improved without reducing efficiency, and since the structure is simple, it can also contribute to cost reduction.

This is truly an invention that has various effects.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, and Fig. 1 is a partially cutaway side view of the tractor, Fig. 2 is a side view of the main parts explaining the operating state of the belt converter and stopper arm, and Fig. 3 is a side view of the main parts. The figure is a view taken along the line A--A in FIG. 2. Code explanation (1)...Tractor (2)...Mower (4
)... Lifting motor (8)... Front PT
O-axis α... Belt converter C14... Tension arm aQ... Front PTO lever 18!・・・
・Switch■...[Work i <21...
・Stopper arm (24a)...one end (
24b) ... Tip patent Applicant Iseki Aki Co., Ltd. Procedural amendment (voluntary) January 11, 1985 Director General of the Patent Office Kunio Ogawa 1, Indication of the case Castle Patent Application 1982
-308997 No. 2, Name of the invention Mower safety device 3, Relationship with the person making the amendment Patent applicant address Name Iseki Agricultural Machinery Co., Ltd. (nationality) 4. Agent address 1-11 Kayaba-cho, Nihonbashi, Chuo-ku, Tokyo 25. Target of correction Description and drawings 6, Contents of correction (1) “Drive unit 0 →” on page 5, lines 13 and 14 of the specification is corrected to “drive unit (K)”. (2) "Drive unit (2)" on page 6, lines 18 to 19 of the same page is changed to "
Drive unit (K)”. (3) Correct [@...driver] on page 10, line 13 to "(K)...driver". (4) In the drawings attached to this application, Figures 1 and 2 are amended as shown in the attached sheets.

Claims (1)

[Claims] In a mower device that transmits power from the front PTO shaft of a tractor to a drive unit via a belt converter, a stopper arm is rotatably provided near the tension arm of the belt converter, and one end of the stopper arm is attached to the mower. In addition to connecting to the front part, a switch for the mower lifting motor circuit is provided on the front PTO lever, and when the mower is raised, the tension arm is locked by the stopper arm to disengage the clutch of the belt converter, and the front PTO lever is connected to the front PTO lever. A mower safety device characterized in that the mower lifting motor is ``off'' when it is ``on''.