JPS6234905B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a locking device for a cabin roof opening/closing device that is provided in a tractor cabin and can be rotated to open and close. This invention relates to a locking device for a tractor cabin roof opening/closing device that can be adjusted to any desired position and locked.

[Problems to be solved by conventional technology and invention]

Conventionally, it was easy for those skilled in the art to attach a roof to the cabin of a tractor, to pivotally connect the rear end of the roof to the cabin, and to open and close the roof using a damper. It is possible to come up with this idea. Furthermore, it is also known that as a means for connecting the roof and the cabin, a fixing mechanism is provided in which the roof is fixed at an appropriate opening angle using bolts between the stay and the plate. Therefore, such a fixing mechanism has a complicated structure, and when manually opening the roof, it is extremely troublesome to adjust an arbitrary opening angle and lock this angle.

[Means for solving problems]

The present invention has been proposed in view of the above-mentioned deficiencies and as a solution to the problems. The roof is provided with a fixing mechanism that can be fixed at an appropriate opening angle, and the means for connecting the roof and the cabin is a roof opening/closing device using a damper. A collar 11 is fixed to the tip of the body 5, and the piston rod 8 is loosely fitted,
Furthermore, this collar 11 has a screw 1 on its outer surface.
1a, and furthermore, a thin hollow cylindrical tapered part 11b into which the piston rod 8 can be tightly fitted is provided at the tip of the collar 11, and this tapered part 11b
Cut grooves 11c, 11c... are provided nearby, and further,
A tapered hole 12a is provided in one of the inner holes, and a female thread 1 is screwed into the male thread 11a of the collar 11 in the other.
The present invention provides a locking device for a tractor roof opening/closing device, characterized in that a tightening nut 12 provided with a bolt 2b is fitted onto the piston rod 8.

[Examples and effects]

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.

As shown in FIG. 1, a pivoting base of a roof 3 is pivotally connected to one edge of an opening 1a provided in a cabin 1 with a hinge pin 2, and the roof 3 is connected, for example, to It is provided so that it can be rotated up and down to open or close the opening 1a, and a fluid such as high-pressure gas or oil is sealed in order to reduce the impact caused by the weight of the roof 3 during this opening and closing operation. The rear end of the cylindrical body 5 of the damper 4 is pivoted to a bracket 7 attached to the cabin 1 with a pin 6, and the tip of the piston rod 8 of the damper 4 is attached to a bracket 9 attached to a pin 10 near the rotating tip of the roof 3. Arrives at the pivot point.
As shown in FIG.
Fit the collar 11 on the tip of the
1a is fixed to the cylindrical body 5 by caulking, etc., and a thin hollow cylindrical tapered part 11b that can be tightly fitted into the piston rod 8 is provided at the tip of the collar 11.
Cut grooves 11c are carved near 1b. Then, a tightening nut 12 having a tapered hole 12a in one of its inner holes and a female thread 12b in the other is fitted onto the piston rod 8, and the female thread of this tightening nut 12 is inserted into the male thread 11a of the collar 11. 12b, the tapered part 11b of the collar 11, which is tightened in the tapered hole 12a, becomes the cut groove 11c...
Therefore, the piston rod 8 is strongly tightened, and a fixing mechanism 13 for the piston rod 8 is constituted by the collar 11 and the tightening nut 12 so that the piston rod 8 is prevented from moving in and out at an arbitrary protruding position. ing.

In addition, in the example of application to the cabin roof in FIG.
In this way, in the closed position, the hinge pin 2, pin 10, and
Pin 10 and pin 6, and pin 6 and hinge pin 2
By making sure that the virtual three-point links formed between the three supporting points are not located on the same plane, it is possible to reduce the resistance at the initial stage of rotation when pushing up and rotating the roof 3 in the closed state. It is. Therefore, when the roof 3 is closed as shown by the solid line in Fig. 1, the movement of the piston rod 8 in and out is prevented by screwing the tightening nut 12 into the male thread 11a, so that, for example, when a riding agricultural machine is running, Even if an external force is applied that causes the roof 3 to rotate upward due to vertical swinging, the roof 3 can maintain its closed state well. When ventilation or air intake is necessary, the tightening nut 12 is sufficiently loosened and the roof 3 is pushed up, and the piston rod 8 is gently moved into the cylindrical body 5 by the damper action of the damper 4.
This means that the roof 3 can be opened quietly.

Therefore, as shown by the two-dot chain line in Figure 1, at any opening degree that is most convenient for ventilation and air intake,
When the tightening nut 12 is rotated and the female thread 12b is strongly tightened to the male thread 11b of the collar 11, the tapered hole 12a of the tightening nut 12 is cut into the cut groove 11c provided near the tapered portion 11b. 11c..., the hole diameter is reduced and the tapered part 11b of the collar 11 is strongly clamped.
The piston rod 8 will be sufficiently fixed, so that the roof 3 between the hinge pin 2 and the pin 10, the damper 4 between the pin 10 and the pin 6, and the members forming the cabin 1 between the pin 6 and the hinge pin 2 The three-point link formed by can firmly hold the roof 3 in this open position. Moreover, the operation of fixing or unfixing the piston rod 8 in this way is extremely easy, and
It goes without saying that when the roof 3 in the open state is closed, the damper 4 can be used to bring it into close contact with the opening 1a very quietly.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view of a main part of an embodiment of the present invention, FIG. 2 A is a partially cutaway side view of a damper used in the same device, and FIG. . Explanation of symbols, 1...cabin, 1a...opening, 2
... Hinge pin, 3... Roof, 4... Damper, 5... Cylindrical body, 6, 10... Pin, 7, 9... Bracket, 8...
Piston rod, 11... Collar, 11a... Male thread, 11b... Taper part, 11c... Cut groove, 1
2...Tightening nut, 12a...Tapered hole, 12b...
Female thread, 13...Fixing mechanism.

Claims (1)

[Claims] 1. The rear part of the roof is pivotally connected to the cabin so that it can be opened and closed, and the roof and the cabin are connected. Furthermore, the roof is provided with a fixing mechanism that can be fixed at an appropriate opening angle, and the roof and the cabin are connected together. The connecting means is a roof opening/closing device using a damper, in which a collar 11 is fixed to the tip of the cylindrical body 5 on the side where the piston rod 8 enters and exits the damper 4, and the piston rod 8 is loosely fitted therein; This collar 11 is provided with a thread 11a on its outer surface, and furthermore, a thin hollow cylindrical tapered part 11b into which the piston rod 8 can be tightly fitted is provided at the tip of this collar 11, Cut groove 11
A tightening nut 12 is fitted onto the piston rod 8. The tightening nut 12 is provided with a tapered hole 12a in one of the inner holes and a female thread 12b screwed into the male thread 11a of the collar 11 in the other. A locking device for a tractor roof opening/closing device, characterized in that: