JPS5929461B2 - tractor safety equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for a tractor with a steering bundle and a steering seat located behind the engine.

As a means of ensuring safety when this type of tractor falls over,
Generally, a method was used in which a gate-shaped safety frame was erected so as to straddle the control section space, but if an attempt was made to secure a sufficiently large control section space with this gate-shaped safety frame, the safety The height of the frame is too high, and the safety frame tends to get in the way when storing the tractor in a garage or when transporting a large number of tractors on a transport vehicle.

One way to keep the safety frame as high as possible is to position the safety frame relative to the vehicle body as close to the operator's seat as possible, but tractor operator seats are generally installed so that they fit between the left and right fenders. Because of this, there is no attachment point for the safety frame right next to the seat, and since the attachment point immediately in front of the seat would obstruct the operator's getting on and off, the safety frame should be attached to the vehicle body at a point as far away from the seat as possible. The frame was required to be high enough to cause problems in storage, etc.

Therefore, as a technique to eliminate such inconvenience, conventionally, as shown in Japanese Utility Model Application Publication No. 50-31619, the safety frame is made to be movable relative to the vehicle body or to be detachable. Although the technology is known, the safety frame is not completely fixed to the vehicle body in this way,
A structure that can be raised and lowered freely or detached has the disadvantage that it requires an extremely sturdy mounting structure that can withstand external forces with a dog moment that act on the mounting point when the aircraft falls.

The technical problem that the present invention aims to solve is that when attaching a safety frame to a tractor, the conventional fixed idea that the safety frame must be attached to the vehicle body, which is a strong structural part, and the attachment point must be undulating or detachable. overturn the stereotype that
Improve the position of safety frame installation and attachment/detachment points,
In addition, by partially improving the structure of the safety frame itself, while fully fulfilling its original function of securing maneuvering space, it does not become an obstacle when storing, etc., and the mounting structure has been specially designed. The idea is to devise ways to avoid the need to make it powerful.

The technical means of the present invention taken to solve the above problems are as follows:
In a tractor in which a control bundle and a control seat are installed at the rear of the engine, a safety frame is installed at the rear of the engine and in front of the control bundle, and the upper end of the safety frame is connected to the rear end of the vehicle body. The height of the safety frame is set so that an imaginary line connecting the control bundle and the control seat passes above the control bundle and the control seat to form a control space below the imaginary line, and the safety frame is set above the vehicle body frame. A lower frame that is fixed to support arms projecting laterally outwardly from the left and right sides and whose upper end is set higher than the upper end of the engine; and a lower frame that is detachable from the upper end of the lower frame. an upper section-shaped frame configured to have an upper part-shaped frame, and a transverse rod that passes above the rear of the engine and connects the upper end of the lower frame to each other at a position lower than the eye level of the operator sitting in the operator's seat. It is composed of

The effects of taking the above technical measures are as follows.

In other words, the vertical division of the safety frame is higher than the upper end of the engine, and the lower frames are connected by a horizontal rod above the engine and at a position lower than the operator's eye level. As a result, the lower frame is constructed as a rigid member, as if it were a part of the vehicle body frame, so that the horizontal rod, which is provided without obstructing the driver's forward view, is a rigid member. A safety frame of sufficient height can be constructed simply by connecting a relatively short upper section-shaped frame to a frame body consisting of a lower frame and horizontal rods.

In other words, instead of attaching a one-piece safety frame with vertical heights directly to the vehicle body as in the past,
The safety frame is divided into a lower frame and an upper section-shaped frame, of which only the lower frame is fixed to the vehicle body, and it is also strong enough to be recognized as part of the vehicle body by using horizontal rods. By fixing it to
The mounting structure at the attachment/detachment point of the upper section type frame, where external force acts only with a relatively small moment due to the short length, can withstand smaller external forces in terms of strength compared to a case where the integral safety frame is detachable. It can be a structure.

Therefore, the safety frame can be divided into upper and lower sections to eliminate obstacles during storage and transport without making the mounting structure particularly strong for the attachment/detachment part. It is also possible to utilize the lower frame as a support member for a canopy or the like after removing the upper section frame, which is also effective in increasing the versatility of the safety frame mounting structure.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Reference numeral 1 denotes a four-wheel agricultural tractor, which is an example of a working vehicle, and is equipped with a driving engine 3 on the front side of a body frame 2, a control section 5 on the rear side, and running wheels 4.4 located below.

In front of the control section 5, support arms 9, 9 are attached to the ends of support arms 9, which extend outward from the sides of the vehicle body, from mounting plates 8, 8 fixed across the sides of the vehicle body 2 and the flange portion of the main clutch case 20. A generally gate-shaped safety frame 6 is erected at the rear of the engine 3 and in front of the control bundle 5b, and connects the upper section-shaped frame 6b of the gate-shaped safety frame 6 with the rear end of the vehicle body. A connecting imaginary line a-a passes above the bundle 5b and the seat 5a, and a space A having a substantially triangular shape in side view is formed between this imaginary line a-a, the safety frame 6, and the vehicle body.

It is desirable that the imaginary line a-a be located above the head of the operator seated on the seat 5a.

The safety frame 6 has a pair of upper and lower frames 6b approximately in the middle.

6a, and the lower end of the lower frame 6a is an L-shaped fixed piece 10.10 fixed to the end of the support arms 9, 9.
It is fixed to an L-shaped mounting piece 11.11 fixed with bolts 12a, 12b, etc. in a state where they overlap.

The protrusions 13, 13 that stand up from one side of the L-shaped mounting piece 11.11 have their intermediate parts 13a, 13a partially cut out to increase the length of welding to the cylindrical safety frame 6. .

A substantially middle portion of the lower frame 6a is connected via a stay 7.7 to an engine mounting frame 2', which is an example of a support frame near the front end of the fuselage, to increase the strength of the safety frame 6 in the longitudinal direction.

Further, near the upper end of the lower frame 6a, a horizontal rod 6a' is connected to a portion slightly higher than the bundle 5b and lower than the operator's eye level, and this horizontal rod 6a' and the lower frames 6a, 6a are connected to each other. A roughly gate-shaped frame body is constructed with the above.

A backing plate 15 curved along the outer periphery of the tube of the lower frame 6a is fixed to both ends of the horizontal rod 6a', and a locking nut 16 is fixed in advance to the side of the backing plate 15 facing the inside of the pipe of the horizontal rod 6a'. ing.

Therefore, after inserting the bolt 17 from the outside of the lower frame 6a on the side opposite to the side where the locking nut 16 is located and screwing it into the locking nut 16 to fix the horizontal rod 6a', the periphery of the backing plate 15 is By welding to the frame 6a, not only will the welding work itself become easier, but the strength of the connected portion will be even stronger.

The connection between the lower frame 6a and the upper section frame 6b is as follows:
As shown in FIG. 3, a common core material 14 is inserted into the upper and lower frames 5a, 5b, and bolt insertion holes 14a are bored at positions separated from each other by an appropriate distance above and below the core material 14.

Bolts 17 and 18 are inserted through 14b and are removably connected to the upper and lower frames 6a and 6b integrally with nuts 16 and 19, respectively.

Therefore, even if the vehicle overturns or reverses, by erecting the safety frame 6, a constant space can be secured at least in the approximately triangular space A portion regardless of whether the vehicle is lying down. This prevents an unforeseen situation in which a sloppy pilot becomes trapped under the aircraft, and allows the pilot to escape easily.

Incidentally, as shown by the imaginary line in FIG.
As shown by the imaginary line at the rear of the vehicle body in the figure, there is another protective member 2.
1, it is possible to prevent damage to the aircraft body when it falls backwards.

[Brief explanation of drawings]

The drawings show an embodiment of the tractor safety device according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a perspective view showing the structure of the safety frame attachment part, and Fig. 3 is the structure of the attachment/detachment part of the safety frame. FIG. 4 is a sectional view showing IV- in FIG.
It is a sectional view taken along the line IV. 2...Vehicle frame, 3...Engine, 5...Control unit, 5a...Seat, 5b
...Bundle, 6...Safety frame,
6a...Lower frame, 6a'...Horizontal rod, 6b...Upper section frame, 7...
・Stay, 8... Mounting plate, 9... Support arm, A... Space, aa... Connect the rear end of the vehicle body and the top of the upper section frame. An imaginary line to connect.

Claims (1)

[Claims] 1. In a tractor in which a control bundle 5b and a control seat 5a are installed at the rear of the engine 3, a safety frame 6 is installed at the rear of the engine 3 and in front of the control bundle 5b. The safety frame is arranged so that an imaginary line a-a connecting the upper end of the frame 6 and the rear end of the vehicle body passes above the control bundle 5b and the control seat 5a, and a control space is formed below the imaginary line a-a. 6, and further, the safety frame 6 is fixed to support arms 9, 9 that project outward from the left and right sides of the vehicle body frame 2, and
lower frames 6a, 6a whose upper end position is set higher than the upper end of the engine 3, and the lower frames 6a, 6a;
an upper section-shaped frame 6b configured to be detachably attached to the upper end; and a lower section that passes above the rear of the engine 3 and is located at a position lower than the eye level of the operator seated in the operator's seat 5a. A safety device for a tractor characterized in that it is composed of frames 6a and a horizontal rod 6a' that connects the upper ends of the frames 6a and 6a to each other.