JPS6340526Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a safety device that prevents accidental damage to the exhaust system when removing the loader in a tractor having a vertical exhaust system in which a front loader is detachably attached. .

A lift arm having a working tool such as a bucket or a blade at its front end is detachably attached to the midsection of the tractor body in the longitudinal direction via a pair of left and right attachment devices.

Some tractors with a front loader are equipped with a connector that connects the left and right side frames each having a lift arm to each other in order to prevent the left and right side frames from separating from each other and to ensure strength.

Incidentally, the connector is horizontally hung near the top plate of the tractor bonnet to connect the side frames to each other from a place that does not obstruct the driver's view as much as possible.

When the connector is attached in this manner, the connector may collide with the exhaust system of the tractor when the front loader is removed and the tractor is moved forward or backward.

Therefore, although it is sufficient to remove the connector and then release the mounting device, in the past, the mounting device was sometimes released without removing the connector, resulting in damage to the exhaust device.

Therefore, the present invention has devised a safety device that prevents damage to the exhaust system by making it possible to release the mounting device whenever the connector is removed. A mounting base 20 is fixedly installed on the left and right sides of the fuselage 8, and a pair of left and right side frames 12 provided on the base end side of the front loader 2 are mounted on the mounting base 2 at the rear of the exhaust system 10.
The exhaust device 10 is removably attached to the exhaust system 10.
A connector 23 that connects a pair of left and right side frames 12 to each other in the middle of the height direction is detachably provided, and an engaging tool 22 provided on the lower end side of each side frame 12 can be detachably attached on the mounting base 20. At the same time, the connector 23 is rotatably attached to the side frame 12 by a shaft 30 in the front-rear direction, and one end 31 of the connector 23 is attached to the fixing tool 32 on the tractor body 8 side by rotating around the axis of the shaft 30. The connector 23 can be freely engaged and detached from the vertical exhaust device 1.
It is characterized by being able to escape from 0.

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

FIG. 1 shows an example in which a bucket-shaped front loader 2 is removably attached to a two-axle, four-wheel type tractor 1 by a pair of left and right attachment devices 3.

The tractor 1 has a pair of left and right front wheels 4 and a pair of left and right rear wheels 5, an engine 6 is mounted on the front side, and a transmission case 7 is connected to the rear of the engine 6 via a clutch housing etc. constitutes a tractor body 8.

The engine 6 is covered with a bonnet 9,
A vertical engine exhaust device 10 projecting upward from the bonnet 9 is provided upright on one side of the bonnet. Note that 11 indicates a control handle.

The front loader 2 is configured such that the base end of a lift arm 13 is pivoted to each of a pair of left and right side frames 12 so as to be movable up and down, and the lift arm 13 can be raised and lowered by a lift cylinder device 15. A working tool 16, shown as a bucket in this example, is provided at the front end, and the working tool 16 is tiltable by a tilt cylinder device 17.

Furthermore, the front loader 2 has a guard plate 18 extending forward from the pair of left and right side frames 12.
A stand 19 which also serves as a protector is provided at the tip of the guard plate 18, and the stand 19 can be attached to and detached from the tractor body 8 by means of a pin 19A which can be inserted and removed from the side.

A pair of left and right side frames 12 are detachably attached to the front and rear midsections of the tractor body 8 via attachment devices 3.

Referring to Figures 2 and 3 along with Figure 1,
Reference numeral 20 denotes a mounting base, which is fixed to both sides of the tractor body 8. Specifically, it is firmly fixed to the clutch housing or the like of the tractor body 8 with bolts (not shown), and the mounting base 20 is a hook that extends outwardly and upwardly and has a sliding portion in the front and back direction at the upper part. shaped engaged part 2
1 is formed, and the front end of the engaged portion 21 is formed with a slope 21.
It has A.

The lower part of the side frame 12 is formed into a bifurcated portion, and an engaging tool 22 indicated by a pin is fixed to the bifurcated portion in this example, and the engaging tool 22 is attached to each engaged portion 21 of the mounting base 20. It is depressed from above to below and is slidable to some extent in the front-back direction, and cannot be removed in the up-down direction when it is fitted into the rear notch of the engaged part 21. Here, a pair of left and right side frames 12 are placed on a mounting base 20 so as not to be removable in the vertical direction, and the front loader 2 can be freely removed to the tractor body 8 by inserting and removing a pin 19A.

Reference numeral 23 denotes a connector, which is formed into an L-shape when viewed from the front and back, and has a hook portion 24 at one end and a hook portion 25 at an intermediate bent portion, and these hook portions 24 and 25 are connected to each side frame 12. It can be freely engaged and detached from pins 26 and 27 attached to the top of the
It can be released and fixed with fasteners 28 and 29. Furthermore, a shaft 30 is rotatably attached to one side frame 12 in the middle of the connector 23 via a longitudinal shaft.
A hook 31 is formed extending further from the shaft attachment 30, and the hook 31 is connected to the engaged portion 21.
A fixture 32 fixed to the mounting base 20 near the
It is said that it can be detached from the connection at will.

That is, when the connector 23 engages its hook portions 24 and 25 with the pins 26 and 27 and is tightened with the fasteners 28 and 29, the connector 23 is placed halfway in the height direction of the exhaust system 10, preferably as close to the bonnet top plate as possible. The two side frames 12 are horizontally suspended in close proximity to each other, and the pair of left and right side frames 12 are connected to each other, and the hooks 31 are engaged with the fixtures 32 from inside. The hook 31 is slidable in the front and rear directions relative to the fixing member 32, but is engaged in an upward direction so as not to be detachable.

Next, the effect will be explained.

In the installed state shown in FIGS. 1 and 2, the lift cylinder device 15 is extended and contracted, the tilt cylinder device 17 is extended and contracted, and the tractor body is moved forward and backward to carry out loading work, light excavation work, land leveling work, etc. Work tools according to the purpose of work 16
Various tasks can be performed by wearing the .

During this work, the left and right frames 12 are connected by the connectors 23, so they do not expand or fall inward, creating a strong framework.

Therefore, in order to remove the front loader 2, the work tool 16 is grounded, the attachment device 3 is removed, and the tractor 1 is moved backwards. 26 is engaged with the hook portion 24, and the hook 31 at the other end is a fixture 32 formed on the mounting base 20.
Since the connector 23 is engaged with the side frame 12 and the mounting base 20 unless the connection of the connector 23 is released,
This means that you cannot leave.

Therefore, first, loosen the fasteners 28 and 29, rotate the connector 23 about the pivot 30 as shown in FIG. 3, and release the engagement of the hook 31 with the fixture 32. The tractor 1 is moved backwards after avoiding the
It is placed in a predetermined position by the following. When reattaching, the tractor 1 is moved forward, and at this time, the slope 21A of the engaged portion 21 guides the engaging tool 22, which is advantageous.

Figures 4 and 5 are used as a safety mechanism for removing the mounting device.
A configuration as shown in the figure could be considered, but this would be structurally complex and troublesome to reset.

In FIGS. 4 and 5, A is a mounting base, which is fixed to the tractor and has a pin insertion hole B.

C is a side frame having a pin insertion hole D;
Align pin insertion holes B and D and attach side frame C.
A mounting pin E attached to the side can be freely inserted and removed.

The mounting pin E is attached to the shaft F attached to the frame C, and the pin mounting plate H is detachable via the retaining pin G. Corresponding to the mounting pin E, a regulating body I made of an elastic plate is attached to the side frame. C, and the regulating body I can be operated by a remote control strip shown by a Bowden wire J against the elastic force thereof so as to be in a position that does not correspond to the mounting pin E. The pair of left and right side frames C are connected by a connector, and the other end of the Bowden wire J is connected to the connector.

Therefore, in the examples shown in FIGS. 4 and 5, when the unillustrated connector is removed, the regulating body I retreats from the mounting pin E as shown by the chain line in FIG. 4, and only then can the mounting pin E be removed. .

The present invention is as described above, and although the pair of left and right side frames provided at the proximal end of the front loader are connected to each other with a connector to reinforce the machine frame on the front loader side, the front loader is not connected to the tractor body. When removed, it is possible to reliably prevent the connector from colliding with the vertical exhaust system and destroying it.

That is, the connector is provided on one side frame so as to be rotatable around an axis in the front and back direction,
Due to this rotation, the connector is removably engaged with the fixing device on the tractor body side, and the connector can be retracted from the vertical exhaust system, so the side frame can be removed without disengaging the fixing device. Removal from the mounting base is restricted by the connector's engagement with the fixture, and the front loader cannot be removed from the tractor body unless the connector is removed from the fixture, and the connector may damage the exhaust system. This has the advantage that the connector acts as a safety device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of the tractor when a front loader is attached, Fig. 2 is a view taken along the line A-A in Fig. Fig. 4 is a partial side view of the comparative example, Fig. 5 is a diagram of the operating state of the
The figure is a sectional view showing a part of FIG. 4. 1...Tractor, 2...Front loader, 3...
...Mounting device, 8...Tractor body, 10...Exhaust device, 12...Side frame, 13...Lift arm, 20...Mounting base, 21...Engaged part, 2
2... Engagement tool, 23... Connector, 31... Hook, 32... Fixing tool.

Claims (1)

[Claims for Utility Model Registration] A pair of left and right side frames 1 provided at the proximal end of a front loader 2, with mounting bases 20 fixedly installed on the left and right sides of a tractor body 8 having a vertical exhaust system 10.
2 is detachably attached to a mounting base 20 at the rear of the exhaust device 10, and further includes a connector 23 detachably connecting the pair of left and right side frames 12 to each other midway in the height direction of the exhaust device 10, The engaging tool 22 provided on the lower end side of each side frame 12 is removably placed on the mounting base 20, and the connector 23 is rotatably attached to the side frame 12 by a shaft 30 in the front-rear direction. One end 31 can be freely engaged and detached from a fixture 32 on the tractor body 8 side by rotating around the axis of the shaft 30, and the connector 23 can be connected to the vertical exhaust device 1.
A safety device for removing a front loader for a tractor, characterized in that it can be retreated from zero.