JPS6117759B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an improvement in a hoist with a traversing device.

[Conventional technology]

This type of hoist is generally constructed as shown in FIG.
and an outer frame 5 that surrounds the winding drum 4 and supports the winding drum 4, electric motor 2, and speed reducer 3. A wire rope 6 comes out from the winding drum 4 and connects to the hook block. 7, and the other end is fixed to the outer frame 5, forming a so-called two-hanging wire rope.
Reference numeral 8 denotes a transverse side plate 10 connected to the outer frame 5 via a connecting rod 9 consisting of a pair of tightening bolts arranged at intervals in the axial direction of the winding drum 4; It is a transverse portion consisting of wheels 12 that extend transversely along the road.

In a hoist with this configuration, the lifting height is, for example, 6
If the lifting head changes from a low lifting head of 12 m to a high lifting head of 12 m, the outer frame 5, winding drum 4, wire rope 6, etc. will naturally become longer. However, the movement of the load point (the position of the center of the hook block) also changes as a matter of course.

Conventionally, the holes in the outer frame 5 in which the connecting rods 9 connecting the hoisting section 1 and the transverse section 8 are inserted are equally spaced on both sides with respect to the axial center of the outer frame 5 even when the lifting height changes. It was getting worse. However, as mentioned above, if the lift changes, the load point also changes, so it was necessary to cover the amount of load movement for a long lift, and the pitch had to be significantly increased. The above situation will be explained in detail with reference to FIG. This figure shows the relationship between the movement of the load position and the position of the connecting rod 9 of a conventional high-height (12 m) hoist. however,
The illustration of the transverse portion 8, outer frame 5, winding drum 4, etc. is simplified. In the figure, reference numerals 13 and 14 are connecting rod insertion holes into which the connecting rods 9 are inserted, and the spacing a between the connecting rod insertion holes is equally spaced on both sides with respect to the axial center 0 of the outer frame 5. P is one end of the wire rope 6 fixed to the outer frame 5, and Q ₁ and Q ₂ are the winding start end and winding end, respectively, when the wire rope 6 is wound around the winding drum 4.

[Problem that the invention seeks to solve]

Therefore, the lowest and highest positions of the hook block 7 are 7-1 and 7-7, respectively, in the figure.
-2 position, and the amount of load movement in the axial direction is c. That is, the distance a between the connecting rod insertion holes 13 and 14
This means that there is a margin of dimension d relative to the amount of movement c of the high-lift load. Along with this, the hole pitch of the transverse side plate 10 connected by the connecting rod 9 becomes wider, resulting in a larger shape, and the wheel 12 also becomes larger in size due to the wider pitch, resulting in a heavier and more expensive product. There were flaws.

The object of the invention is to overcome these drawbacks and provide a hoist with a small and economical traversing section.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 3, the connecting rod insertion holes 13 and 14 are located at the uppermost position 7-1 of the hook block 7, respectively.
2 and the lowest position 7-1, the pitch b is the amount of movement c of the high-lift load.
is almost equal (b≒c), and the hole pitch is smaller by the margin d in Fig. 2 compared to the conventional one (b
≒a-d).

As a result, the dimensions of the transverse side plates 10 and the like are reduced, and these parts can be made smaller and lighter. Furthermore, since both ends of the movement of the hook block 7 along the winding drum 4 are located between the pair of connecting bolts 9, one end of the winding drum 4 in the axial direction is lowered and the other end is raised. The winding drum 4 does not tilt.

〔Effect of the invention〕

Since this invention is configured as described above,
Not only can the horizontal part be made compact, lightweight, and inexpensive, but the hoist is extremely superior in that the hoist does not tilt and operates reliably no matter where the hoist block is located. There is an effect that can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an external view of an electric hoist, and FIGS. 2 and 3 are diagrams showing the relationship between the movement of the load position and the position of the connecting rod in hoists according to a conventional hoist and an embodiment of the present invention, respectively. In the figure, 1 is a winding part, 4 is a winding drum, 5 is an outer frame, 7 is a hook block, 8 is a transverse part, 9 is a connecting rod, 10 is a transverse side plate, and 13 and 14 are connecting rod insertion holes. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A transverse part equipped with wheels that runs horizontally along a rail includes an outer frame, a winding drum rotatably attached to the outer frame, one end of which engages with the winding drum, and the other end of which is wound around the winding drum. and a hook block suspended from the outer frame are connected via a pair of connecting rods spaced apart from each other in the axial direction of the winding drum, and the winding drum is rotationally driven. A hoist for raising and lowering the hook block within a predetermined lift range, wherein the axial mounting position of the connecting rod is substantially coincident with both end positions of the movement range of the load point in the lift range.