JPS62386Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a door locking device in the cabin of various working machines such as a boxhoe and a bulldozer.
Some devices are designed so that the door can be unlocked in the closed and open states using a common handle.

Incidentally, the entrance/exit of the cabin of this type of work machine is usually equipped with a rotating door that opens outward, and the door can be locked in a closed state and an open state, respectively. ,
In the past, the locking device for the closed state and the open state, or the releasing device for the locking device, were installed independently, making the structure extremely complicated, and the handle for releasing the locking in the open state was attached to the cabin. It is usually installed inside the cabin, and therefore, when closing the door, one must operate the handle inside the cabin with one hand while rotating the door outside the cabin in the closing direction with the other hand. The operation of closing the door has become extremely troublesome.

The present invention has been developed in view of the above circumstances, and has a structure in which the door is unlocked in the closed state by operating a handle provided on the door, and the door is unlocked in the open state. By interlocking the locking member with the handle, the handle can be used to release the lock even in the open state, which simplifies the structure of the entire locking device and also allows the door to be released in the open state. When closing the door from a locked state, the door can be released from the lock using the handle and rotated in the closing direction with one hand, thereby facilitating the closing operation of the door. It is something.

This will be explained below using an example of a bucket hoe. In Fig. 1, 1 is the fuselage, 2 is a running section at the bottom of the fuselage, 3 is a dozer installed in the front of the fuselage, and 4 is a bucket hoe (not shown) that operates the same. It is an arm that allows you to 5 is a cabin provided at the front of the aircraft, 6 is an engine room also provided at the rear, and the rear end is hinged 7 on the side of the cabin.
A door 8 is provided which is supported via a door 7 so that the doorway can be rotated from a closed state shown by a solid line in the figure to an open state shown by a chain line. Reference numerals 9 and 9' indicate handles provided on both the inner and outer surfaces of the door, 10 a closing locking member protruding from the front end surface of the door, and 11 protruding from an opening 12 formed on the surface of the door. A hook 13, which is a locking member for opening and engages with the member 11, is fixed at a predetermined position on the side surface of the cabin. Next, referring to FIGS. 2 and 3, the interlocking mechanism of the handle 9 and both locking members 10 and 11 installed inside the door will be explained. Reference numeral 14 indicates a handle shaft that is rotated by operating the handle, and reference numerals 15 and 16 indicate the corresponding Arms 17 and 18 fixed to the shaft are connecting shafts that can be moved laterally at the same time by the swinging of both arms, and a pin 19 is inserted into the elongated hole at the end of the arm and the hole at the end of the shaft.
20 is passed through, the corresponding arms and shafts are connected, and one shaft 17
The locking member 10 for closing is fixed to the other end, and the slide member 21 is fixed to the other end of the other shaft 18, and the locking member 11 for opening is integrated with this member. It is made to protrude to the outside from an opening 12 formed in the door surface. Reference numeral 22 denotes a spring installed between a spring receiver 23 on the shaft 18 and a spring receiver 24 fixedly installed inside the door. The locking member 11 is the hook 13
They are each energized in the direction in which they engage with each other (direction a). Here, the surface 13a of the hook 13 that the locking member 11 comes into contact with when the door is opened is an inclined surface,
When the locking member comes into contact with the surface, the locking member is once moved in the direction opposite to a, so that the locking member automatically engages with the hook.

According to the above configuration, when the door 8 is locked in the closed state, when the locking member 10 is moved backward by operating the handle 9, the locking member 10 moves out of the recess 25 on the cabin side shown in FIG. When the door is released, the lock is released and the door can be opened, but this structure and operation are the same as in the conventional case. However, in the present invention, the arm 16, the connecting shaft 18, and the slide member 21 are moved by operating the handle 9.
The locking member 11 for opening is moved against the spring 22 through the locking member 11, so that when the door is opened, the locking member 11 is moved as shown in FIG.
is engaged with the hook 13, by operating the handle 9, the locking member is released from the hook, and the door can be rotated in the closing direction by the handle. The handle that releases the lock in the closed state can also be used to release the lock in the open state, and the release operation and the door closing operation can be performed continuously with one hand.

As described above, the present invention has a structure in which the handle for releasing the lock in the closed state and the locking member for opening are linked in the door for opening and closing the entrance/exit of the cabin of various work machines. This makes it possible to release the lock even in the open state, which greatly simplifies the structure of this type of device compared to a case where a locking device is provided for each of the closed and open states. At the same time, the operation of releasing the lock in the open state and closing the door, which was particularly troublesome to operate in the past, can now be performed continuously with one hand, making the operation significantly easier. It is played.

[Brief explanation of the drawing]

FIG. 1 is a side view of a working machine showing an embodiment of the present invention;
FIG. 2 is an enlarged cross-sectional plan view of essential parts showing the door in the open state in this embodiment, and FIG. 3 is a vertical cross-sectional side view taken along the line of FIG. 2. 5...cabin, 8...door, 9...handle, 10...locking member when closed, 11...locking member when opening, 13...hook.

Claims (1)

[Scope of utility model registration request] A rotating door that opens and closes the doorway on the side of the cabin is equipped with a handle for releasing the lock when the door is closed, and a hook is fixed at a predetermined position on the side of the cabin, and the door is engaged with the hook when the door is open. A cabin of a working machine, characterized in that a mating locking member is movable, and the locking member and the handle are interlocked so that the locking member is separated from the hook by operating the handle. Door locking device.