JPH0124220Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a roof door opening/closing mechanism for a power working machine with a cabin.

Conventionally, the roof door opening/closing of a power working machine with a cabin has been a mechanism in which one side of the roof door is pivotally connected to the cabin ceiling plate, and the roof door is opened and closed centering around the pivot joint. Not only does it have to be supported, but it also has to be locked with a predetermined hook or the like even when it is closed, making operation cumbersome.

In this invention, a cylinder mechanism is interposed between the roof door and the ceiling plate, and the cylinder mechanism is constructed by telescopically fitting a biasing sliding rod into a pipe, and the roof door is opened and closed by the cylinder mechanism. A roof door opening/closing system for a power working machine with a cabin that facilitates operation by supporting the roof door when it is opened and locking it when it is closed using the biasing force of a biasing sliding rod without using any other members. It is intended to provide a mechanism.

To explain the embodiment of this invention in detail based on the drawings, A is a backhoe as an example of a power working machine with a cabin. In front of the cabin 3, a boom 4 is connected to the front end of the fuselage frame 2 so as to be movable up and down.
5 is a bucket, and 6 is a running part.

A driving unit 7 is housed inside the cabin 3, and 8 is an entrance/exit door of the cabin 3.

A rectangular ceiling opening 10 is provided in the ceiling plate 9 of the cabin 3, and a rising edge plate 11 is provided on the periphery of the opening 10. In this case, a roof door 12 is disposed so as to be openable and closable with an edge plate 11 covering the roof door.

That is, the base ends 15, 15' of front and rear support arms 14, 14' are pivotally attached to the front and rear inner edges of the ceiling opening 10 via front and rear brackets 13, 13'. It is configured to be freely rotatable up and down around the parts 15, 15', and a cylinder mechanism M is provided in series at the tips of the front and rear support arms 14, 14'. A roof door 12 is integrally connected to the roof door 12.

The cylinder mechanism M is configured as follows. That is, a roof door 12 is connected to a pipe M-1 with a supporting bracket M-2 interposed therebetween.
A fixed rod M-3 and a sliding rod M-4 are inserted into the pipe M-1 from the front and rear openings, respectively, and the sliding rod M-4 is connected by a spring M-5. ,
It is biased in the direction of extension. Moreover, fixed rod M-3
The respective tips of the sliding rod M-4 are pivotally connected to the tips of the front and rear support arms 14, 14', 16, 16', thereby making it possible to connect the arms 14, 14' and the telescoping device M. There used to be.

Therefore, since the sliding rod M-3 is always biased in the direction of extension of the cylinder mechanism M, the roof door 12
In either the open or closed state,
It is configured to maintain the same state with the same biasing force.

In the figure, reference numeral 17 denotes a cushioning rubber pad installed on the upper end of the edge plate 11 of the ceiling opening 10.

The roof door 12 is configured such that its peripheral edge is bent to form a bent edge 12', and the bent edge 12' covers the outer side of the edge plate 11 of the ceiling opening 10. There is.

The embodiment of this invention is constructed as described above, and when opening the roof door 12, when the lower surface of the roof door 12 is pushed upward from inside the cabin 3, the telescopic rod M- 4 is inserted into the pipe M-1 against the bias of the spring M-5, and the front and rear support arms 14,
14' is rotated upward around the pivot parts 15, 15' to reduce the maximum shortened position of the telescopic rod M-4, the front and rear support arms 14, 1 are moved beyond the so-called fulcrum point.
4' rotates and tilts upward to raise the roof door 12, and the roof door 12 opens into the ceiling opening 10.
The roof door 12 is opened as a whole, and the front and rear support arms 14, 14' are rotated by the telescoping action of the telescoping device M while being pivotally connected to the device M, and the entire roof door 12 is opened. As shown in FIGS. 4 and 5, when the roof door is to be opened not vertically but only at the front or rear end, the front or rear part of the roof door 12 can be opened vertically. When pushed upward, front support arm 1
4 or the rear support arm 14' can be rotated upwards around the pivot point at the base end, and only the front or rear can be opened. , front and rear support arms 14
Or 14' can be rotated.

In this invention, a cylinder mechanism is interposed between the roof door and the ceiling plate, and the cylinder mechanism is constructed by telescopically fitting a biasing sliding rod into a pipe, and the roof door is opened and closed by the cylinder mechanism. By supporting the roof door when it is opened and locking it when it is closed using the biasing force of the biasing sliding rod without using any other members, opening and closing operations can be facilitated.

Moreover, since one or both ends of the cylinder mechanism that supports the roof door can protrude upwardly and externally from the ceiling opening, only one end of the cylinder mechanism is allowed to protrude upwardly and externally from the ceiling opening.
The roof door can be opened in an inclined state with one end side of the cylinder mechanism raised, or both ends of the cylinder mechanism can be made to protrude upward from the ceiling opening, and the entire roof door can be opened in a substantially horizontal state. .

Therefore, according to Party A, the opening mode of the roof door can be selected from three types: an inclined state where one end or the other end of the cylinder mechanism is raised, and a substantially horizontal state, and the optimum opening state according to the wind direction etc. can be selected. The effect is that the roof door can be opened to create the best working environment inside the cabin.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the backhoe of the proposed structure. FIG. 2 is an explanatory diagram of the main parts. FIG. 3 is a perspective view of the main parts. FIG. 4 and FIG. 5 are examples showing other operating states of the proposed structure. A: Backhoe, 3: Cabin, 9: Ceiling board,
10: opening, 12: roof door, 14,1
4': Front and rear support arm, 15, 15': Pivot, 1
6, 16': Pivot mounting, M: Cylinder mechanism, M-1:
Pipe, M-3: Fixed rod, M-4: Sliding rod, M-
5: Spring.

Claims (1)

[Scope of claim for utility model registration] A roof door 12 in the ceiling opening 10 of the cabin 3
In a power working machine with a cabin mounted so as to be openable and closable, the base ends of support arms 14 and 14' are pivotally mounted at opposing positions on the side edges of the ceiling opening 10 so as to be movable up and down. , 14', a sliding rod M- is biased in the direction of extension in the pipe M-1.
Cylinder mechanism M configured by telescopically fitting 4 into
is constructed so that one or both ends of the cylinder mechanism M can protrude upwardly from the ceiling opening 10, and the roof door 12 is attached to the support bracket M-2 protruding from the pipe M-1. A roof door opening/closing mechanism for a power working machine with a cabin configured to be openable/closable by a cylinder mechanism M.