JP3271310B2 - Safety frame support device for tractors, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety frame support device for protecting a driver's seat such as a tractor and a combine from a rollover of a vehicle body.

[0002]

2. Description of the Related Art A safety frame, which is provided at the rear of a driver's seat of a tractor, is set to an upright posture when necessary, such as during work, and is switched to a lying posture so as not to be obstructed during storage. This is switched undulating posture of safety frame, but to generally lateral transverse pin holes are intended to be performed by the insertion and removal of the lock pin, the safety
Frames are generally heavy and safety frames
At the same time, remove and insert the lock pin
However, there is a problem that it is difficult to perform the switching operation .

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been proposed in a tractor or the like in which a safety frame 10 of a front view portal type is vertically erected above and behind a driver's seat. Safety frame supporting the lower part of safety frame 10
Also provided at the edge of the arm support member 4 are an upright positioning groove 2 and a lodging positioning groove 3 which are notched in the front-rear direction.
On the other hand, at the base end of the safety frame 10, safety frame side positioning grooves 7, 8 overlapping with the standing positioning groove 2 or the falling positioning groove 3 are formed, and the safety frame support member 4 and the base end of the safety frame 10 are formed. And a positioning groove 2 (3) on the safety frame support member 4 side and a positioning groove 7 (8) on the safety frame side when viewed from the side. providing the pin 31 biased by a dated to fall between these grooves when the overlap Te was safe frame support device such as a tractor, characterized in.

[0004]

When switching the up / down posture of the safety frame 10, the safety frame supporting member 4 fixed to the vehicle body is positioned upright or down.
(3) and positioning groove 7 at the base end of safety frame 10
Pull out the pin 31 engaged between (8) and the outside of the groove to change the safety frame 10 to a rotatable state. Thereafter, when the pin 31 is held at a predetermined position outside the groove and the safety frame 10 is further rotated, the positioning groove 2 (3) for standing or falling on the safety frame support member side and the safety frame side Positioning groove 7 (8)
The safety frame 10 overlaps when viewed from the side and the pin 31 falls between the grooves, and the safety frame 10 is positioned in the upright posture or the lying posture.

[0005] As described above, the pin 31 engaged with the positioning groove 2 (3) for erecting or falling down the safety frame support member 4 and the positioning groove 7 (8) on the safety frame side is used.
By removing the safety frame 10 out of the groove while resisting the urging force, the undulating posture of the safety frame 10 can be easily switched. Further, since the pin 31 is urged toward the safety frame 10 or the safety frame support member 4, the pin 31
Is held out of the overlapping position of the groove , and the safety frame
10 will be the pin 31 and rotates the rotation shaft 28 around again overlapping positioning groove between both and is automatically engaged, Therefore, the operator safety frame 10 with one hand At the same time, operate pin 31 with the other hand .
This eliminates the need for a troublesome operation such as a troublesome operation, and allows the posture of the safety frame 10 to be quickly changed. Further, a groove 2,3,7,8 which notched in the longitudinal direction on both the safety frame 10 and a safety frame support member 4, to which the pin 3
1 was moved in the front-back direction and dropped.
The insertion of the pin 31 into the grooves 2, 3, 7, and 8 can be performed in a shorter time than the conventional configuration in which the lock pin is inserted into and removed from the pin hole.
Change the posture of the safety frame quickly,
And it can be done easily.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of using a safety frame 10 in a tractor will be described. The tractor body 5 has a front wheel 11 and a rear wheel 12, and is driven by four wheels by an engine E mounted on a front part. Transmission case 1 on which rear wheel 12 is mounted
3 and from the upper side of the left and right rear wheels 12
A fender 14 is attached to an integrated frame 6 at the rear, and a driver's seat 15 is mounted at the center of the fender 14 so that a front steering handle 16 can be operated. Safety frame 1
0 is made of square cross-section pipe material, and forms a front view portal shape,
It is mounted on the frame 6 at the rear of the fender 14 and surrounds the rear of the driver's seat 15 in the standing posture.

A tilling device 17 is connected to the rear side of the transmission case 13 by a lower link 18, a top link 19 and the like, and can be moved up and down by a lift arm 20 which is hydraulically operated by a lift cylinder. 21 is a tillage shaft, 22 is a tillage nail. A safety frame support member (hereinafter referred to as a lock plate 4) having a front wall portion 23 and left and right side wall portions is provided on both left and right side portions of the frame 6, and a bottom portion 26 of a bracket 25 having a rear or upper side opened is bolted. Attach at 27. The left and right lower ends of the safety frame 10 are each integrally formed with a movable plate 9 on each of the left and right sides. The movable plate 9 is inserted between the lock plates 4 on the left and right sides of the bracket 25 so as to be undulated in the horizontal direction. It is attached so as to be rotatable around the shaft 28. The safety frame 10 can be attached and detached by inserting and removing the undulating shaft 28. 29 is a tightening nut.

On the rear edge of the lock plate 4, a positioning groove 2 for standing and a positioning groove 3 for falling are cut out in the front-rear direction.
The relationship between the rear edge of the movable plate 9 and the safety frame side positioning grooves (the positioning groove 7 for standing up and the positioning groove 8 for lodging) notched at the lower edge is such that the lock plate side is upright at the posture position where the safety frame 10 is upright. In the posture position where the positioning groove 2 for use and the positioning groove 7 for standing on the safety frame side are overlapped on the left and right, and the safety frame 10 is laid down on the rear side, the positioning groove 3 for locking plate side and the safety frame side for positioning. The positioning groove 8 is set so as to be able to overlap left and right,
By engaging the hook 1 with each of the overlapping portions of the grooves 2 and 7 or the grooves 3 and 8, the undulating position of the safety frame 10 can be fixed. For this reason, the lock plate side erecting positioning groove 2 and the lodging positioning groove 3 are formed on the upper and lower corrugated cam edges along the rear edge of the lock plate 4, and the positioning grooves 7, 8 on the safety frame side are Are formed vertically along the rear edge of the movable plate 9, and a step portion 24 is formed between the upper and lower grooves 7, 8 outside the rear edge of the lock plate 4 to temporarily hook the hook 1. Can be kept.

The hook 1 comprises a ring 30 through which a finger can pass and a pin 31 in the horizontal direction. Guide edges 32 are formed on both left and right ends of the pin 31. Urged toward the front wall 23 side. Pin 31
Can be fitted or engaged with each of the grooves 2, 3, 7, 8 and the step portion 24, and the guide edge 32 is provided with the outer lock plate 4 when the engagement position is changed. We guide so that we do not come off from part.

The movable plate 9 includes a safety frame 10
Of the bracket 25 and the rear wall 23
The stopper guides 35 and 36 are formed so as to be in contact with the rubber damper 34 attached along the line, so as to absorb the play of the safety frame 10 caused by the hook 1. In order to switch the safety frame 10 from the standing posture to the lying posture, the step portion 24 of the movable plate 9 projects from the rear edge of the lock plate 4 as shown in FIGS. The hooks 1 on both sides are disengaged from the lock plate-side standing positioning groove 2 and the safety frame-side standing positioning groove 7 against the respective springs 33 and engaged with the step portions 24. In this state, when the safety frame 10 is turned backward and falls down, the locking groove 3 for positioning on the lock plate side and the positioning groove 8 for falling down on the safety frame overlap right and left. The pin 31 of the replacement hook 1 is pulled by the spring 33 and is engaged with the hook.

In order to switch the safety frame 10 from the falling posture to the standing posture, as shown in FIGS. 8 to 10, the hooks 1 on both the left and right sides are positioned on the locking plate side positioning groove 3 and the safety frame side falling positioning. The safety frame 10 is detached from the position of the groove 8 and once engaged with the position of the positioning positioning groove 2 on the lock plate 4 side, and in this state, the safety frame 10 is rotated to the standing posture. At this time, when the positioning groove 7 for erecting on the safety frame side coincides with the positioning groove 2 for erecting on the lock plate side by the rotation of the movable plate 9, the pin 31
Falls into the standing position of the safety frame 10.

As shown in the drawing, in order to change the hook 1, the positioning groove 2 for standing on the lock plate 4, the positioning groove 7 for standing on the safety frame, or the positioning groove 3 for falling on the lock plate 3, The step portion 24 for temporarily holding the pin 31 removed from the frame-side lodging positioning groove 8
Is provided on the movable plate 9, the engagement of the pin 31 can be automatically performed only by the raising / lowering rotation operation of the safety frame 10, and the operation is further facilitated.

[Brief description of the drawings]

FIG. 1 is a side view of a safety frame mounting portion.

FIG. 2 is a side view showing the operation.

FIG. 3 is a rear view.

FIG. 4 is a plan view thereof.

FIG. 5 is a side view showing the operation.

FIG. 6 is a side view showing the operation.

FIG. 7 is a side view showing the operation.

FIG. 8 is a side view showing the operation.

FIG. 9 is a side view showing the operation.

FIG. 10 is a side view showing the operation.

FIG. 11 is a side view of the tractor.

FIG. 12 is a rear view of the safety frame portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hook 2 Lock plate side positioning groove 3 Lock plate falling positioning groove 4 Lock plate 5 Body 6 Frame 7 Safety frame side standing positioning groove 8 Safety frame side falling positioning groove 9 Movable plate 10 Safety frame

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60R 21/11-21/13 B62D 49/00

Claims (1)

(57) [Claims] 1. A tractor or the like standing safety frame 10 viewed from the front portal freely undulating upward after the driver's seat, Ahn
Safety frame support member 4 supporting the lower portion of all frames 10
The notch in the front-rear direction has a positioning groove 2 for standing.
And the positioning groove 3 for lodging are provided.
Also the base end edge portion, said safety frame side positioning grooves 7 and 8 which overlap the upright positioning groove 2 or fallen positioning grooves 3 are formed, the proximal end of the safety frame support member 4 and the safety frame 10 Are connected to each other by a rotation shaft 28, and a positioning groove 2 (3) on the safety frame support member 4 side and a positioning groove 7 on the safety frame side
(8) A safety frame support device for a tractor or the like, characterized in that a pin 31 is provided which is urged to fall between these grooves when they overlap with each other when viewed from the side .