JPH0211490Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, a swivel base was attached to a traveling machine base so that it could rotate horizontally around a vertical axis, and a vertical lock pin inserted into the floor and the swivel base was engaged with and disengaged from the traveling machine base to lock the swivel base. A hook is provided on the lock pin as a device for
A device in which hook locking parts are provided on the floor and above, and the hooks are replaced with the upper and lower locking parts to lock and release the swivel base was developed in 1983.
This locking device, already known from Japanese Patent No. 159466, has an upper hook locking part that protrudes above the floor, which is a nuisance and makes it difficult to align the hook with the hole in the hook locking part, especially in the upper part. It was extremely difficult to align.

The purpose of this invention is to improve the above-mentioned drawbacks, and the purpose of this invention is to attach a swivel base to the traveling machine base so that it can rotate horizontally around a vertical axis, and to attach a vertical lock pin inserted into the floor and the swivel base. In a swing working machine that locks a rotating base by engaging and disengaging from a traveling machine base, the upper part of a locking member is fixed to the upper part of the locking pin, and the width of the lower part of the locking member is gradually narrowed to form two stages. The present invention is characterized in that two notched grooves are provided around the lock pin of the floor, into which the lock material fits and locks the stepped portion.

The embodiments shown in the drawings will be explained below.
1 is a traveling machine base having a crawler 2; on the traveling machine base 1 is mounted a swivel base 3 which horizontally rotates around the axis O of the vertical axis;
It is equipped with an operation panel 4 and a cockpit 5, and a shovel 6 is attached to the front.

Reference numeral 7 is a lock pin having a bent gripping part 7a at the upper part and a pin part 7b fixed at the lower part. It is inserted into and removed from the receiving hole 11 of the traveling machine base 1 while being loosely fitted into the guide hole 10 of the swivel base 3.

Then, a locking material 12 made of a plate extending downward is fixed to the upper part of the locking pin 7, and the locking material 12 is formed into two stepped portions 12a, 12b so that the widths a and b of the lower part of the locking material 12 are successively narrowed in two steps. form,
A locking material 12 is provided around the hole 9a of the plate 9.
Two cutout grooves c and d having lengths corresponding to the lateral widths a and b are bored.

Also, when the washer 13 attached to the middle part of the lock pin 7 pulls out of the pin part 7b from the receiving hole 11,
When the pin portion 7b comes into contact with the lower surface of the plate 9,
is fitted into the guide hole 10 by an amount L.

In the above-mentioned device, when locking the swivel base 3, the wide part b of the locking material 12 is inserted into the notch d of the locking pin 7 as shown by the solid line in FIG. 2, and the stepped part 12b is joined onto the plate 9. Then, the pin part 7b
is inserted into the receiving hole 11 and the swivel base 3 is locked. At the start of work, hold the grip part 7a and pull up the lock pin 7, then turn it 180 degrees and move the narrow part a to the notch part C.
When the stepped portion 12a is joined to the plate 9, the pin portion 7b comes out of the receiving hole 11 as shown by the chain line in FIG. 2, and the lock is released.

When the locking material 12 is fitted into the notched grooves c or d, if the locking material 12 is turned to the left or right with its lower end joined to the upper surface of the plate 9, the notched grooves c, d
It can be easily aligned and inserted without looking at the position.

Also, when assembling the lock pin 7, the plate 9
By making the hole into which the bolt 14 fits into an elongated hole or making it large, the plate 9 can be moved relative to the floor 8 and the lock pin 7 can be adjusted relative to the receiving hole 11.
can be easily aligned.

As mentioned above, the present invention is to attach a swivel base to a traveling machine base so as to be able to horizontally rotate about a vertical axis, and to lock the swivel base by engaging and disengaging the vertical lock pins inserted into the floor and the swivel base from the traveling machine base. In the swing working machine, the upper part of the locking member is fixed to the upper part of the locking pin, the width of the lower part of the locking member is gradually narrowed to form two step parts, and the floor is arranged around the locking pin. Since two notched grooves are provided in which the locking material fits and locks the stepped portion, there is no need to erect a locking member for the lock pin on the floor, and there is no problem with driving operation. Moreover, when fitting the locking material into the notch groove on the floor, the positioning can be done extremely easily just by rotating the locking material, and it is possible to lock or lock the swivel base even while checking the safety of the surroundings. can be canceled quickly.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is a side view of the swing working machine, FIG. 2 is a sectional view of a main part, and FIG. 3 is a sectional view taken along line AA in FIG. 2. 1... Traveling machine base, 3... Swivel base, 7... Lock pin, 9... Plate, 10... Guide hole, 12...
...Lock material, 12a, 12b...Stepped portion, CD...
Notched groove.

Claims (1)

[Scope of utility model registration request] A swing work machine in which a swivel base is mounted on a traveling machine base so as to be horizontally swivelable around a vertical axis, and the swivel base is locked by engaging and disengaging the vertical lock pins inserted into the floor and the swivel base from the traveling machine base, The upper part of the locking material is fixed to the upper part of the locking pin, the width of the lower part of the locking material is gradually narrowed to form two step parts, and the locking material is fitted around the locking pin of the floor. A swing lock device for a swing working machine, characterized in that two notched grooves are provided for locking a stepped portion.