JPS6253439B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention fixes the wire rope by means of a rod-shaped suspension member whose both ends are welded to a pair of side plates disposed at both ends in the axial direction of a drum around which the wire rope for cargo handling is wound. This invention relates to an improvement of the outer frame of a hoist that suspends the side ends.

The case of a conventional hoist of this type shown in FIG. 1 will be explained. In the figure, 1A and 1B are known pairs of pulley side plates, 2A and 2B are horizontally spaced from each other, and
Both ends thereof are hanging shafts supported by the lower portions of the corresponding pulley side plates 1A and 1B, and are used to suspend the outer frame of a hoist, which will be described later. Reference numeral 3 denotes a well-known drum that is placed within the outer frame of a hoist, which will be described later, and around which a wire rope for cargo handling, which will be described later, is wound. Reference numeral 4 denotes a hoist that is suspended by hanging shafts 2A and 2B and that surrounds and supports the drum 3. The outer frame covers the drum 3 and a pair of side plates 4A and 4B that are arranged at both axial ends of the drum 3 and support an electric motor (not shown), a reduction gear mechanism (not shown), etc. Drum protection plates 4C and 4D, one end and the other end of which are welded to a pair of side plates,
4E, 4F, 4G, 4H, and 4J are arranged parallel to the rotational center line of the drum 3, and both ends are welded to the side plates 4A, 4B, and a support plate, which will be described later, is attached at the lower center in the longitudinal direction. It is composed of a suspension member 4K made of channel steel with a hanging opening facing downward, and a pair of support plates 4L and 4M that are suspended by welding to the suspension member 4K and support a shaft to be described later. It is something. 5 is a shaft whose one end and the other end are supported by support plates 4L and 4M, and 6 is a terminal fitting 7 whose upper part is loosely fitted to the shaft 5 and whose lower end is fixed to the end of a cargo handling wire rope to be described later. A cylindrical support member 8 is a wire rope for cargo handling, and one end is attached to the drum 3.
The other end is suspended by the support member 6, and is wound onto and unwound onto the drum 3, and also suspends the hook block 9. Note that FIG. 2 is a side view of FIG. 1 viewed from the direction of the arrow.

In the device constructed in this way, the hook block 9 is moved up and down by the forward and reverse rotation of the drum 3.
Since it moves downward, cargo handling work can be carried out. In addition, the load that acts on the wire rope 8 during cargo handling work is such that one end of the wire rope 8 acts on the drum 3, and the other end of the wire rope 8 is applied to the terminal fitting 7→support member 6→shaft 5→support plates 4L, 4M→hanging member. 4K → side plates 4A, 4B
It acts on

For this reason, the support member 4K requires a large beam strength, which results in the outer frame 4 being heavy and expensive.

This invention was made in view of the above-mentioned conventional circumstances, and includes a pair of side plates disposed at both axial ends of a drum around which a cargo handling wire rope is wound.
This was made for the purpose of providing a lightweight and inexpensive outer frame of a hoist for suspending the fixed end of the wire rope using a rod-shaped suspension member with both ends welded together. An embodiment of the present invention will be described with reference to the drawings. In the figure, 4Da
is a bent portion formed by bending the lower half of the drum protection plate 4D toward the drum 3, and its lower end is welded to the upper center of the support member 4K. Note that explanations of other symbols are the same as those of FIGS. 1 and 2, and will therefore be omitted. Moreover, FIG. 4 is a side view of FIG. 3 viewed from the direction of the arrow.

In the structure configured in this way, the suspension member 4K is also supported by the drum protection plate 4D, so the beam strength may be smaller than that of the conventional structure. In addition, the drum protection plate 4D is bent toward the drum 3 side, and the bent portion 4
Since the lower end of Da is welded to the suspension member 4K, the suspension member 4K can be placed on the center side of the drum 3, thereby eliminating or minimizing the protrusion of the suspension member 4K to the outside of the drum protection plate 4D. can do. It goes without saying that the suspension member 4K may be made of angle iron or the like and is not limited to the channel steel of the above embodiment.

As described above, the present invention provides a rod-shaped suspension member whose both ends are welded correspondingly to a pair of side plates disposed at both axial ends of a drum around which a cargo handling wire rope is wound. In the hoist outer frame for suspending the drum, a bent part is formed at the lower part of the drum protection plate, and the suspension member is welded to the lower part of the drum protection plate, making it extremely simple. With this structure, the beam strength of the suspension member can be significantly reduced compared to the conventional one, which not only makes it lighter and cheaper than the conventional one, but also allows the suspension member to be brought closer to the drum side, resulting in a smaller size. It has the excellent effect of providing a compact product.

[Brief explanation of the drawing]

1 and 2 show a conventional hoist, with FIG. 1 being an overall configuration diagram and FIG. 2 being a side view of FIG. 1 viewed in the direction of the arrow. Furthermore, FIGS. 3 and 4 show an embodiment of the present invention.
FIG. 3 is an overall configuration diagram, and FIG. 4 is a side view of FIG. 3 viewed in the direction of the arrow. In the figure, 3 is the drum, 4 is the outer frame, 4A, 4B
is the side plate, 4D is the drum protection plate, 4Da is the bent part,
4K is a hanging member, 5 is a shaft, and 8 is a wire rope. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A pair of side plates arranged on both sides in the axial direction of the drum around which the cargo handling wire rope is wound, a drum protection plate that covers the drum and has one end and the other end welded to the pair of side plates, and the above-mentioned A rod-shaped suspension member arranged parallel to the rotation center line of the drum, one end and the other end of which are welded to the pair of side plates, and suspends the fixed side end of the wire rope, Forming a bent portion bent toward the drum side at the lower part of the drum protection plate,
An outer frame for a hoist, characterized in that the suspension member is welded to the lower part of the drum protection plate.