JP2011207558A - Wire rope suspending angle display plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display plate for easily grasping a suspending angle of a wire rope required for determining whether a load applied to the wire rope falls within a range of a safety load, by visually observing simultaneously with the wire rope in slinging work.SOLUTION: A plate-like member is hooked on a hook of a crane together with a loop part of the wire rope. In the suspending angle display plate of the wire rope, a hook hole for inserting the hook and the suspending angle of the wire rope, are displayed on the plate-like member.

Description

  The present invention relates to a “wire rope hang angle display plate” that allows a user to easily grasp the hang angle of a wire rope in a state where a load is hung when the crane is slung.

  When a suspended load is transported and moved by a crane, a wire rope is typically wound around the suspended load, and loop portions provided at both ends of the wire rope are hung on a crane hook and lifted. In that case, the load applied to the wire rope will vary depending on the weight of the suspended load, the number of wire ropes applied to the hook, and the suspension angle, but the load must be within the safe load range of the wire rope. . Therefore, once the weight of the suspended load is determined, the number of wire ropes, the method of winding the suspended load, the suspension angle, and the like are selected so that the load applied to the wire rope falls within the safe load range.

JP-A-6-307801

  As for the hanging angle, wind the wire rope around the suspended load, hang the loop part provided at both ends of the wire rope on the hook of the crane, and then lift the crane slightly and then the wire rope just before the suspended load leaves the floor surface In the state of being stretched, in a state immediately before the so-called ground cutting, the staking work worker is visually determined from a position away from the suspended load by an appropriate distance. However, it is difficult to accurately grasp the hanging angle by visual observation, and therefore it is difficult to determine whether or not the load applied to the wire rope is within the range of the safe load.

  The wire rope suspension angle display plate of the present invention displays the wire rope suspension angle. Therefore, by attaching the wire rope hanging angle display plate to the hook during the slinging operation and performing the slinging operation, it is possible to easily grasp the hanging angle by simultaneously viewing the display of the wire rope and the slanting angle. Thereby, it becomes easy to determine whether or not the load applied to the wire rope is within the range of the safe load.

One example of implementing the hanging angle display board of the present invention Example of a straight line with the top side of the hook hole horizontal and an example of a curve Example of the overall shape of the display panel

1: Suspension angle display plate 2: Hook hole 3: Suspension angle display part 4: Hook 5: Area within 30 ° of hanging angle 6: Area within 60 ° of hanging angle 7: Linear hook hole 8 with a horizontal upper side: Hook hole with a curved upper side

  The wire rope hanging angle display plate of the present invention is a flat plate member that is hung on the crane hook together with the loop portion of the wire rope, and a hook hole for passing the hook is provided substantially above the flat plate member. The hanging angle of the wire rope is displayed below the hole.

A hook hole is a hole for hanging the wire rope display board of this invention on the hook (metal fitting) of a crane. A loop portion of a wire rope that suspends a suspended load is hung on the hook together with a hanging angle display plate of the wire rope. Usually, the number of loops is 2 in the case of two-point hanging and 4 in the case of four-point hanging.
The upper side of the hook hole may be a horizontal straight line or a curve. In the case of a curve, it is preferable that the curve be gentler than the curve on the upper surface of the hook. Thereby, the 0 degree direction of the hanging angle display comes to face vertically downward by the weight of the display board. In addition, by attaching a weight below the suspension angle display plate, or by attaching a plate instead of the weight or screwing, the 0 degree direction of the suspension angle display can be easily directed vertically downward. May be.

  The display of the suspending angle is an indication of the angle (suspending angle) created between the two wire ropes from the hook toward the suspended load on the plate. For example, it can be shown in a color-coded manner, for example, a region with a hanging angle of 30 ° or less (reference numeral 5) and a region with a hang angle exceeding 30 ° and within 60 ° (reference numeral 6). Alternatively, a scale on which the hanging angle can be read may be described on the display board.

  FIG. 1 shows one embodiment of the present invention. The hanging angle display plate 1 is provided with a hook hole 2 and a hanging angle display 3. The display of the suspension angle in FIG. 1 indicates 30 ° and 60 ° by color.

Wire rope JIS 6 × 37 Class A (safety factor: 6)
Example of safety load chart (in the case of two 2-point suspension)

Weight of suspended load when suspending 2 points using a JIS 6 × 37 A class wire rope with a rope diameter of 12 mm and the suspension angle grasped by the wire rope suspension angle display plate of the present invention is within 30 ° Is less than 2.4 tons, it is within the safe load range of the wire rope.

Wire rope JIS 6 × 37 Class A (safety factor: 6)
Example of safety load chart (in the case of two 4-point suspension)

  FIG. 3 is an example in which a hanging angle display plate of the invention illustrating hanging angles of 30 ° and 60 ° as illustrated in FIG. 1 and a four-point hanging slinging operation using two wire ropes. In this case, since the suspension angle display plate can easily grasp by visual measurement that the suspension angle is over 30 ° and within 60 °, referring to Table 2, the load of the suspended load is 4 mm with a rope diameter of 12 mm. If it is less than 4 tons, it is within the safe load range of the wire rope.

Claims (1)

  A flat member that hangs on the crane hook together with the loop portion of the wire rope. The flat member has a hook hole for passing the hook and a wire rope suspension angle display. Board.

Images