JPH0340859Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is based on a work platform mounted on the base immediately behind the driver's seat of a traveling vehicle via a slewing bearing with inner and outer races. This invention relates to a working vehicle such as a crane, in which one of the inner and outer races is fixed to a workbench, and the other is integrally connected to the base via a bolt placed concentrically with the race.

(Prior Art) In the above-described working vehicle such as a crane, the bolt, which is a connecting means for integrally connecting the race and the base, is hidden by the workbench.

(Problem to be solved by the invention) For this reason, it was not possible to check for loosened or broken bolts, and if the bolts were left unattended, serious accidents could occur.

(Means for Solving the Problems) In order to solve the above-mentioned problems, this invention provides a working vehicle such as a crane as described above, in which a through-hole is provided on the workbench side through which the locus of movement passes over the bolts. The bolt is constructed by drilling a through hole having a size that allows the bolt to be tightened from above.

(Function) With the above structure, the operator can retighten the bolt through the through hole,
This retightening allows you to check for looseness and breakage of bolts. Although it is possible to inspect all the bolts by rotating the workbench little by little by providing the above-mentioned through-hole in one place, it is recommended to make the through-hole in two or more places to improve work efficiency. Of course, holes may also be provided.

(Example) Next, the present invention will be explained in detail based on a specific example.

In FIG. 1, A is a vehicle-mounted crane, in which a base 2 equipped with an outrigger device is mounted on a traveling vehicle body 1, and a work platform 5 has a boom 4 mounted on the base 2 via a swing bearing 3. is mounted directly behind the driver's seat.

The swing bearing 3 consists of an inner race 6 and an outer race 7, and the inner race 6 is attached to the base 2 by bolts 8 arranged concentrically with the inner race 6 at approximately equal intervals.
is fixed. In addition, the outer race 7 has a small number of bolts 9 on the boom side where the load is to be lifted, and a large number of bolts 9 on the side opposite to the boom side where the load is to be lifted, each concentrically with the outer race 7. , are integrally fixed to the workbench 5 via these bolts 9.

It should be noted that a large number of bolts are provided on the side opposite to the boom side described above because the tensile force due to the suspended load acts on the bolts. 10 is the base 2
The workbench 5 is rotationally driven by driving a large gear 12 provided on the outer periphery of the outer race 7 via a small gear 11 which is a motor provided on the side and is integrally connected to the motor 10 . Reference numeral 13 denotes a through hole bored at a position substantially perpendicular to the direction of extension of the boom 4 on the workbench 5 side. This through hole 13 is located at a position where its movement locus passes over the bolt, and by engaging a torque wrench (not shown) with the head of the bolt 8 through this through hole 13, the bolt 8 additional tightening is possible.

(Effects of the invention) This invention has an excellent practical effect in that it is extremely easy to inspect the bolts of the race that are integrally connected to the base via the bolts.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing one embodiment of the present invention, and FIG. 2 is a view taken along the line B--B in FIG. 1; Traveling vehicle body, 2; Base, 3; Swivel bearing, 5;
Workbench, 6; Inner race, 7; Outer race, 8; Bolt, 9; Bolt, 13: Through hole.

Claims (1)

[Scope of utility model registration request] The workbench is mounted on the base directly behind the driver's seat via a swing bearing with inner and outer races.
In a work vehicle such as a crane, in which either one of the inner and outer races is fixed to a workbench, and the other is integrally connected to the base via a bolt placed concentrically with the race. , a crane, etc., characterized in that a through hole is bored on the workbench side, the through hole whose movement path passes over the bolt, and whose size is such that the bolt can be tightened from above. work vehicle.