JP2961842B2 - Mobile agricultural machine retractable safety frame - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a retractable safety frame for a mobile agricultural machine.

[Problems to be Solved by the Related Art and the Invention] In a mobile agricultural machine such as a tractor, a loop-shaped column (safety frame) is erected from both right and left sides of a driver's seat and substantially upward to prepare for a fall of the vehicle body. There has been known a structure in which this is rotatable.

However, when the safety frame is configured to be retractable, there is a problem that the strength of the connecting portion between the vehicle body fixed side and the movable side becomes weak, and in order to compensate for this, for example, this is replaced by a high-strength expensive member. There is a need to construct and to connect firmly with bolts, nuts and the like, and there is a problem that costs are increased and operability is impaired.

[Means for Solving the Problems] The present invention is intended to solve the above-mentioned problems of the conventional apparatus, and has taken the following technical means. That is, in the retractable safety frame of the mobile agricultural machine, which is covered with a loop-shaped column 6 from both right and left sides of the driver's seat 1 and substantially upward, the left and right base ends of the column 6 are placed on the fenders 2, 2. While being connected to the mounting brackets 4 and 5 so as to be able to rotate back and forth, one end 11 of the substantially U-shaped restricting tool 8 is pivotally connected to the mounting brackets 4 and 5, and the other end 9 is formed in a loop shape. A collapsible safety frame for a mobile agricultural machine that is engaged with and connected to a fixing hole 7 opened at the left and right base ends of the column 6.

The left and right base ends of the loop-shaped support 6 are provided with the same support 6.
Are fixed at least in the "upright position" A and the "lying position" B. The substantially "U" -shaped restricting tool 8 is urged toward the mounting brackets 4,5. A movable safety machine is provided with a retractable safety frame provided with a means 27 for performing the operation.

[Operation and Effect of the Invention] The present invention has the following technical advantages by adopting the above-described configuration. That is, in the collapsible safety frame of the mobile agricultural machine, which is covered by a loop-shaped support 6 from both left and right sides of the driver's seat 1 and substantially upward.
Attach the left and right base ends of the mounting brackets 4,5 on the fenders 2,2
And one end 11 of a substantially U-shaped restricting tool 8 is pivotally connected to the mounting brackets 4 and 5, and the other end 9 is connected to the left and right In the configuration of the movable safety frame of the movable agricultural machine that is engaged with and connected to the fixing hole 7 opened at the end, the support column 6 is configured to be rotatable and the substantially U-shaped restricting tool 8 is formed. With this one end 11
Are pivotally attached to the brackets 4 and 5 and the other end 9 is engaged with the base end of the column 6 from the lateral direction and fixed, so that it is fixed at three points together with the rotation axis. Therefore, the mounting structure is simple, and the weight and cost of the vehicle can be reduced.

The left and right base ends of the loop-shaped support 6 are provided with the same support 6.
Are fixed at least in the "upright position" A and the "lying position" B. The substantially "U" -shaped restricting tool 8 is urged toward the mounting brackets 4,5. In the configuration of the movable safety machine of the retractable safety frame characterized by providing the means 27 for performing, provided with a fixing hole 7 .. at least positioned in the "upright posture" A and the "lying posture" B, Since the above-mentioned substantially "U" -shaped restricting tool 8 is provided with a means 27 for urging toward the mounting brackets 4 and 5,
To release the posture of the safety frame, it is only necessary to release the restricting tool 8 from the engagement, and the operation of changing the posture of the safety frame is simple.

Hereinafter, an embodiment of the present invention will be illustratively described in detail with reference to the drawings.

In the illustrated example, the present invention is folded into a safety frame 13 attached to the vicinity of the driver's seat 1 of an agricultural tractor 12.

The agricultural tractor 12 includes front and rear wheels 14, 15 at four corners, and an engine 16 provided above the front wheels 14, 14, a clutch housing 17, a front transmission case 18, and a rear transmission case.
The main frame 19 is integrally connected to the motor 19 via a locking member such as a bolt or a nut.

A steering handle 20 is provided in front of the driver's seat 1, and fenders 2 that cover the rear wheel 15 from the front to the upper are provided on the left and right sides. Reference numeral 30 in the figure denotes a hand frame that is grasped when getting on and off the tractor.

FIGS. 4, 5, and 6 show the connecting portions of the safety frame 13.
It will be described based on.

On the upper surface 3 of the left and right fenders located at the rear of the seat 1, there are provided flat mounting brackets 4 and 5 which are substantially parallel to the inside and outside and erected upward, and a bottom plate 21 which supports the brackets 4 and 5. . And this mounting bracket 4,
The front end of the base member 11 of the substantially U-shaped restricting member 8 has a top side (free end 9) shorter than a bottom side (base end 11) in a front view.
Are rotatably inserted. A locking washer 28 is provided at the base end 11 between the mounting brackets 4 and 5, and a coil spring 27 as an urging means is inserted through the base end 11, and this coil spring comes into contact with the washer 28, The configuration is such that the restricting tool 8 is biased in the body direction (the direction of arrow A).

The bottom plate 21 is connected to the lower support frame 10 horizontally connected left and right on the back surfaces of the left and right fenders 2, 2 located below.
Attached to.

The column 6 of the safety frame 13 is made of a pipe material or a flat plate having a substantially square cross section and a constant thickness.
Reinforcement plates 22, 23 are integrally attached to the left and right side surfaces of 1 by welding or the like.

The inner and outer reinforcing plates 22 and 23 are provided with a front pin insertion hole 24 for fixing the column when standing upright, and a rear pin insertion hole 25 serving as a rotation axis of the column 6. The outer reinforcing plate 23 is provided with a plurality of fixing holes 7 in the vertical direction. The fixing holes 7a are in the upright position in order from the upper side, the oblique fixing holes 7c are in the middle, and the reclining fixing holes 7b are in the lower end. Provided.

When mounting the tractor safety frame 13 configured as described above, the base end of the column 6 is fitted between the left and right inner and outer mounting brackets 4 and 5, and the brackets 4 and 5 and the base end are mounted. 11 is penetrated by the rear pin. This allows the support column 6 to rotate back and forth about the rear pin.

When holding the support 6 in the "upright posture" (the state A in the figure), the restricting tool 8 is pulled out toward the outside of the vehicle body, and the free end 9 is inserted into the upright position fixing hole 7a.
In this case, by inserting the front pin into the front pin insertion hole 24, the column can be more firmly supported against a load in the left-right direction.

Further, from this state, when holding in the "intermediate oblique posture" (the state of C in the figure), the restricting tool 8 is pulled out toward the outside of the vehicle body as described above, and the free end 9 is disengaged from the fixing hole 7a. Then, the column 6 is tilted backward about the pin of the rear pin insertion hole 24, and the free end 9 is inserted into the oblique fixing hole 7c. In the "intermediate oblique posture", as shown in FIG. 1, even if the rotary work machine 29 is raised up to the maximum, it is fixed at a position where it does not interfere with the column 6, and the vehicle can be easily taken in and out of the barn.

Further, when holding the support 6 in the “lying posture” (the state of B in the figure), the support 6 is tilted backward as described above, and the free end portion 9 of the restricting tool 8 is inserted into the above-described reclining fixing hole 7b. .

As a result, the safety frame 13 of the tractor is connected on the upper surfaces of the fenders 2 and 2, so that the safety frame 13 can be provided with a wide width that is as wide as the vehicle body, and the mounting bracket 4 that supports the support 6 of the safety frame 13 can be provided. , 5 are connected to each other horizontally to increase the strength against the lateral load applied when falling.

Further, in the safety frame 13, the support shaft 6 is configured to be rotatable, and the base shaft 11 is pivotally attached to the brackets 4, 5 by the substantially "U" -shaped restricting tool 8, and the free end 9 Is engaged with and fixed to the foot of the column, so that
Fixed at a point. Therefore, the mounting structure is simple, and the weight and cost of the vehicle can be reduced.

The safety frame 13 is provided with fixing holes 7 for positioning in the "upright posture", the "diagonal posture", and the "lying posture". Since the coil spring 27 that urges toward the inside of the vehicle body is provided,
When the posture of the safety frame 13 is changed, the restriction member 8 is removed from the fixing holes 7a (7b, 7c) and the safety frame 13 is moved to work.
It is only necessary to rotate the frame, and the posture changing operation of the frame is easy.

[Brief description of the drawings]

[Fig. 1] Side view of main part [Fig. 2] Enlarged side view of main part [Fig. 3] Side view with pillars removed [Fig. 4] Rear view of main part [Fig. 5] Enlarged view [6] Fig.] Top view of Fig. 3 [Fig. 7] Overall side view Brief description of reference numerals 1 ... Driver's seat, 2 ... Fender, 3 ... Top of fender, 4,5 ... Inner and outer mounting brackets, 6 ... Support, 7 fixing hole, 8 restrictor, 9 free end of restrictor, 10 lower support frame, 11 base shaft of restrictor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B62D 25/16 B62D 25/06

Claims (2)

(57) [Claims] 1. A collapsible safety frame for a mobile agricultural machine, which is covered by a loop-shaped column 6 from both left and right sides of the driver's seat 1 and substantially upward, and the left and right base ends of the column 6 are fenders 2, 2 is connected to the upper mounting brackets 4 and 5 so as to be able to rotate back and forth, and one end 11 of the substantially U-shaped restricting tool 8 is pivotally connected to the mounting brackets 4 and 5; A collapsible safety frame for a mobile agricultural machine, wherein the collapsible safety frame is engaged with and connected to a fixing hole 7 opened at the left and right base ends of a loop-shaped support 6. 2. At the left and right proximal ends of the loop-shaped column 6, there are provided fixing holes 7 .. for positioning the column 6 at least in the "upright posture" A and the "lying posture" B. 2. The retractable safety frame for a mobile agricultural machine according to claim 1, wherein the restricting tool 8 having the shape of "" is provided with means 27 for urging toward the mounting brackets 4 and 5.