JPH0620391U - Crane wire disconnection prevention device - Google Patents

Abstract

(57) [Summary] [Purpose] When lifting a load with a crane, even if the arm is lifted from a direction different from the direction in which the load is placed, the wire does not come off the pulley at the end of the arm. [Structure] A fixed bracket 2 is provided at the tip of the arm 1. The movable bracket 5 provided with the pulley 7 on the fixed bracket 2 is fixed to the arm 1 by a pin 6 so as to be rotatable in the left-right direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a crane used for lifting and lowering heavy objects and moving the same, and more particularly to a wire disconnection prevention device for a relatively small crane that is attached to an automobile or the like.

[0002]

[Prior art]

 A conventional crane has a pulley fixed to the end of an arm.

[0003]

[Problems to be solved by the device]

 Conventionally, when a luggage is lifted by a crane, the arm is started by aiming the arm in the direction in which the luggage is placed. If it exists, it is difficult to pull the bag straight up and move it toward you, and you have to move the bag laterally to avoid obstacles and then start hoisting. However, when the arm was moved laterally to move the load laterally, a load was applied laterally to the pulley at the tip of the arm, and the engaged wire was often disengaged. Therefore, with conventional cranes, the arm must always be pointed at the load each time it is lifted, making it difficult to lift the load from different directions.

In view of the above points, according to the present invention, when a load or the like is lifted, the wire does not change the direction of the arm to the direction in which the load is placed each time, and even if the load is lifted from a different direction, the wire tip of the arm It is intended to provide a wire disengagement prevention device for a crane that does not disengage from the pulleys of the above.

[0005]

Means for Solving the Problems In order to solve the above problems, the present invention is characterized in that a pulley is attached to the tip of the arm so as to be rotatable in the left and right directions with respect to the arm.

[0006]

[Action]

 To explain the operation of the wire detachment prevention device of the present invention, the hooks hung on the crane are hooked on the load, and the load is lifted by winding the wire, but the arm is displaced from the direction in which the load is placed. In the present invention, when the wire is wound around the pulley at the tip of the arm and the movable bracket to which the pulley is attached is attached to the fixed bracket at the tip of the arm left and right with respect to the arm, Since the pulley is mounted so that it can be rotated in any direction, the pulley automatically changes its direction when the movable bracket rotates in order to prevent the wire from coming off the pulley at the tip of the arm.

[0007]

【Example】

 An embodiment of the wire disconnection prevention device of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the wire disconnection prevention device of the present invention, and FIG. FIG. In the figure, 1 is an arm of the crane, 2 is a fixed bracket which is fixed to the lower end of the arm 1 by welding or bolts and nuts by an appropriate method, and the wire 3 is inserted into the front of the fixed bracket 2. A hole 4 is provided. Reference numeral 5 denotes a movable bracket whose upper portion is fixed to the front surface of the fixed bracket 2 by a pin 6 so as to be rotatable in the left-right direction with respect to the arm 1, and a pulley 7 is attached to the movable bracket 5.

In the figure, 8 is a lifting bracket, 9 is a hook provided on the lifting bracket 8, and 10 is a pulley attached to the lifting bracket 8.

[0009]

[Effect of device]

 According to the present invention, since the pulley provided at the tip of the arm automatically tilts in the direction in which the load is applied, the wire does not come off from the pulley, and therefore, when lifting luggage or moving it laterally, Even if the arm does not face straight to the direction of the baggage as in the past, the work can be done without changing the direction of the arm each time, and it is possible to improve work efficiency significantly. It is a device.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a wire disconnection prevention device of the present invention.

FIG. 2 is a front view of an essential part showing the operation of the wire detachment prevention device of the present invention.

[Explanation of symbols]

 1 Arm 2 Fixed Bracket 3 Wire 5 Movable Bracket 6 Pin 7 Pulley

Claims (1)

[Scope of utility model registration request] 1. A wire disconnection preventing device for a crane, wherein a pulley is attached to a tip of the arm so as to be rotatable in the left-right direction with respect to the arm.