JPS5934548Y2 - Bonnet opening holding rod on power working machines - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lever for holding the bonnet open in a power working machine.

Generally, bonnets are equipped with retaining rods to keep the bonnet open, but if the retaining rods are foldable, that is, they are folded when the bonnet is closed and extended when it is opened. This method has the disadvantage that the holding rod in the extended state when the lever is opened can unexpectedly bend, and the lever net may suddenly close, causing an accident such as pinching the worker's hands or fingers. In view of the above, it is an object of the present invention to provide a retaining rod configured to reliably maintain the extended state of the retaining rod when the bonnet is opened.

The present invention is a power working machine having a bonnet 7 whose one end is pivotally connected 11 to the machine base 5 and configured to be openable and closable.
The ends of the folding rod 21 which are pivotally mounted 20 are rotatably connected to each other, and the connecting portion 23 is provided with the folding rods 19, 2.
A stopper arm 25 is pivoted on one of the folding rods constituting the lower side of the overlapped portion 24, and is biased by a spring 28. Suppressing portion 2 facing upper surface 24′ of overlapping portion 24
5-1, and will be described based on the embodiment shown in the drawings. It is a power working machine equipped with a rotating machine base 5 above a traveling device 4 with a crawler track 3, a driver's seat 6 with a cabin provided on one side of the front part of the rotating machine base 5, and a rear part of the rotating machine base 5. On one side there is an engine part 8 covered by a bonnet 1.
has been established.

The bonnet 7 is constituted by a box with an open bottom, a rear side wall 9 extending downward, and a pivoting portion 11 for connecting to the machine base 5 at the tip of the extended wall 10.

And a mounting shaft 13 parallel to the pivot shaft 12 of the pivot portion 11
is provided on the machine base 5 below the pivot joint 11, and the mounting shaft 1
3 is fitted with a coil spring 14, and one end of the coil spring 14 is fixed to the machine stand 5.

Further, a support rod 15 is provided protruding from the inner surface of the extension wall 10, and a groove 1 is formed in the lower surface of the support rod 15 in a direction perpendicular to the mounting shaft 13.
6 is formed.

The other end of the coil spring 14 is fitted and held in the groove 16 so as to be slidable along its longitudinal direction. In this case, the resistance force of the coil spring 14 is in the opening direction (arrow a
direction).

The opening holding rod 17 of the bonnet 7 is provided between the bonnet I and the machine base 5, and the opening holding rod 17 has a folding rod 18 whose base end is pivoted 17 to the machine base 5, and a base. It is constructed by rotatably connecting the tips of a folding rod 21 which is pivotally mounted 20 on the inner surface of the side wall of the end bonnet 7. In this case, each folding rod 19, 21 is formed in a U-shape in cross section. , and the tip of the folding rod 19 on the machine base 5 side is fitted into the tip of the folding rod 21 on the bonnet 7 side, and in this fitted state, the connecting pin 22 is passed through the side plate of the folding rod 19.21 to connect. has been done.

This connecting portion 23 is provided with an overlapping portion 24 that restricts the rotation of the folding rod 19°210 in the extended state. , 21' are made to face each other with the folding rods 19 and 21 in an extended state.

And a stopper arm 25 that maintains the extended state of the holding rod 17 by holding the overlapping portion 24 in the overlapping state,
The folding rod 19 on the machine stand 5 side, which constitutes the lower side of the overlapping part 24, is a pivot support 26.

The stopper arm 25 is attached to the folding rod 19 close to the connecting portion 23.
A horizontal rod 25' is pivotally supported 26 between the side plates of the
A suppression plate whose one end extends upwardly from the upper plate 19' of the folding rod 19 via the notched groove 27, and has a suppression part 25-1 at the extending end that contacts the upper surface 24' of the overlapping part 24. 2
5'', and the other end of the stacking rod 25' is provided with the above-mentioned suppressing part 2.
A spring 28 is connected to press and urge the portion 5-1 against the upper surface 24' of the overlapping portion 24.

Note that the reference numeral 29 in the figure is a presser portion provided on the presser plate 25''.

Therefore, when the bonnet 7 is in the closed state shown in FIG.

When the bonnet 7 is opened from this state as shown in FIG. 24, and its rotation is restricted.

Then, in the extended state, the pressing part 251 of the stopper arm 25 is brought into contact with the upper surface 24' of the overlapping part 24, and the pressing part 25-1 in the facing state goes up to the spring 28 and is biased to press. can be held in a stretched state.

In this embodiment, the bonnet 7 is rotated slightly upward from the position where the load in the closing direction, which is the weight of the bonnet 7 and the drag of the coiled spring 14, is balanced.
By holding the bonnet in the open holding position, the weight of the bonnet I is slightly added to the holding rod 17.

In addition, a line C connecting the proximal pivot portions 18.20 of the folding rods 19.21 in the extended state of the holding rod 17 when the bonnet 7 is in the open state is set in the same direction as the loading direction of the bonnet I (the direction indicated by the arrow), Furthermore, connect the connecting pin 22 of the connecting part 23 to the above line C.
It is placed at a position slightly shifted inward.

Since the present invention is configured as described above, the extended state of the holding rod 1T in the open state of the bonnet 7 can be reliably held by the overlapping portion 24 and the stopper arm 25, so that the holding rod 17 may be bent unexpectedly and the bonnet 7 This has the effect of preventing the sudden fall of objects and allowing work to be carried out safely.

[Brief explanation of the drawing]

Fig. 1 is an overall side view showing the power working machine according to the embodiment of the present invention, Figs. FIG. 5 is an enlarged cross-sectional view showing the connecting portion of the opening holding rod. A: Power work equipment, 5: Machine base, 7: Bonnet, 11: Pivot joint, 18: Pivot joint, 19: Folding rod, 20: Pivot joint, 2
1: Folding rod, 23: Connection part, 24: Overlapping part, 24' upper surface, 25: Stroke arm, 25-1: Pressing part, 28
Two shots.

Claims (1)

[Scope of utility model registration request] A power working machine having a bonnet 7 whose one end is pivoted 11 to the base 5 and configured to be openable and closable, includes a folding rod 19 whose base end is pivoted 18 to the machine base 5, and a folding rod 19 whose base end is pivoted 11 to the bonnet 7.
The ends of the bent folding rod 21 are rotatably connected to each other, and the connecting portion 23 is provided with an overlapping portion 24 that restricts rotation of the folding rod 19, 210 in the extended state.
A stopper arm 25 is pivotally supported on one of the folding rods constituting the lower side of 4, and the stopper arm 25 has a suppressing portion 25- which is biased by a spring 28 and comes into contact with the upper surface 24' of the overlapping portion 24.
A bonnet opening holding rod provided with 1.