DD274806A1 - HOOK STRAPS FOR DOUBLE HOOKS - Google Patents

Abstract

The invention relates to a Hakentraverse for double hook, whose aim and task is to ensure an all-round mobility by a hinged attachment of double hooks in hook bottles or multi-cable traverses and to achieve a higher level of security when using the hoists. This is achieved in that the double hook attachment is realized with a hook traverse, which consists of a traverse ball with two oppositely arranged on this pivot pin into which a continuous special bore was introduced perpendicular to the pivot pin, each in the current spherical radius r an oval and in the center of the sphere has a circular shape and their largest deviation on both sides a from the vertical axis of the ball is 8 in each case. Fig. 1

Description

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Title of the invention Double hook hook crossbar Field of application of the invention

The application is carried out on hoists with hooked bottles or multi-rope traverses, preferably two-way traverses on which double hooks for general cargo handling are used.

Characteristic of the known state of the art

A load hook, as a single hook or as a double hook, is mounted in a hook block or in a Mehrseiltraverse, preferably Zeileniltraverse, rotatably mounted in a Hakentraverse, and secured. This hook crossbeam is also mounted in a hook block or in a Zeilenträgers with two in-axis pin joints, so that the load hook can perform a pendulum motion about a horizontal axis. Known Ausfüorungsbeispiele are in the literature (eg Kurth, F, series "materials handling" Unstetigförderer 1, VE9 Verlag Technik, 3rd ed., Berlin 1976) shown. Such a pendulum movement is sufficient for a single hook. Different, however, is the required pendulum movement of a double hook. Despite the fact that both hooks are loaded in equal parts, the load hooked to the double hook must be able to accommodate a maximum allowable inclination of 10% inclination deviation analogous to the TGL 13473. Such a schiefhang is not

attributed solely to unevenly distributed load, but rather to pendulum movements of the posted load, which pntstehen respectively from horizontal movements of the hoist and the inertia of the load. This results in the double hook different load sizes that have additional bending stresses in the hook shaft result. Depending on the hook direction to hook hook is decisive whether the double hook in the joint of the hook beam riies'j load differences can compensate or in the transverse position of the hook to hook hook represents a rigid connection against the pendulum. In this load case, the bending stress increases to the extent that the breaking point of the material is reached and thus the conditions for a hook break in the shaft are given full load of the hook.

The mentioned disadvantage also carries DD-WP 243 260 in itself. Here, the hook crossbeam is replaced only by a hook block, which is articulated with two locking pins and the mobility of the load hook is also only in a horizontal axis. A pendulum movement of the double hook transverse to the traverse is therefore not possible. In DE 2853404 a safety bottom bottle of an overhead crane is described, in which the double hook in the hook traverse in a horizontal axis can perform a small pendulum motion. A pendulum movement in the second Horizontalachsß is given by the fact that the pulleys of the bottom block were placed in the same axis height of the hook traverse. For a standard hook bottle as well as for a Zweiseiltraverse with overhead pulleys, this solution is not applicable in principle.

Object of the invention

It is the object of the invention to propose a technical solution with which an all-round mobility of double hooks in hook bottles or multi-cable traverses, guaranteed and increased safety when using the hoists is achieved.

Explanation of the essence of the invention

The invention has for its object to provide a hinged attachment for double hooks in hook bottles or Mehrseiltraversen, preferably Zeileniltraversen.

This is achieved according to the invention in that the double hook fastening is realized with a hook crosspiece, which consists of a traverse ball with two pivot pins arranged opposite to each other, in which a continuous special bore was made perpendicular to the pivot pin, which in each case in the current spherical radius r an oval and in the center of the sphere has a circular shape whose diameter in the center of the sphere and its width in the current spherical radius r corresponds to the diameter of the hook shank and whose largest deviation on both sides α is from the vertical Kugelc'hse 8 °, that the hook traverse is taken up by two hemispherical sliding shells , wherein the upper sliding shell serves as a pressure ring and the lower sliding shell as a stop ring and wherein the hook shank of the double hook is inserted through the sliding shells and the traverse ball.

The upper sliding shell accommodates an axial deep groove ball bearing, which causes the ease of rotation of the · double hook. The load hook attachment by means of hook nut and nut assurance takes place in an unchanged known manner.

The lower ball cup prevents vertical movement of the double hook. It is important to ensure little play between the lower ball socket and the ball of the hook beam, so that a smooth running of the rotary and pendulum movement of the double hook is given.

After the load has been correctly hit by means of sling ropes or other suitable load suspension devices for double hooks, the vertical lifting movement is initiated by the hoist. Unintentional eccentric striking of the load may result in a misalignment which, according to TGL 13473, may deviate by up to 10 %, which corresponds to an inclination deviation of 5.7 from the horizontal normal position. But even with a load exactly centered results in all hoists with which in addition to the lifting movement and horizontal driving or pivoting movements are feasible, an unintended Schiefhang that resembles a diagonal train.

This arises as a function of the net mass of the tarnished load of the starting acceleration as a caster and of the deceleration as an overfeed of the load. The diagonal train is followed by a pendulum movement of the load, which must be taken up by the Üoppelhaken in each Hakenstelliing. Due to the hook beam according to the invention the double hook receives the Beweglichkeit.in two horizontal planes, so that the consequent off-center loading of the hook shank in any position hook always wirVt equal, d. H. the bending stress in the hook shank is identical due to the common axis intersection for the Pendeluewegungen in both horizontal planes.

embodiment

Structure and operation of the articulated attachment for double hooks are explained below using an example

 To the accompanying drawing show

Fig. 1 Structure of a Zweiseiltraverse with built-in inventive Hakentraverse for double hooks

2 erfifidungsgemäe hook traverse (in different views)

For Fig. 1, a Zweiseiltraverse 1 is shown with arranged over pulleys. The hook traverse according to the invention consists of the traverse ball 3 with two mutually oppositely arranged pivot pin 4. Perpendicular to the pivot pin 4 is a special hole 5 is inserted, which has an oval in the current spherical radius r and a circular shape in the ball center. The Durclvnesser the hole in the ball center and its width in the oval part corresponds to the diameter of the hook shank 6. The largest two-sided deviation Ot from the vertical ball axis is in each case 8 °. The hook traverse is taken up by two hemispherical sliding shells 7 and 8, of which the upper sliding shell 7 serves as a pressure ring and the lower sliding shell 8 as a stop ring. Through the hemispherical sliding shells 7 and 8 and the truss ball 3 through the hook shank 6 of the double hook is inserted.

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The pivot pins 4 are fitted in the plain bearings 9. The upper sliding shell 7 receives an axial deep groove ball bearing 10, which causes the ease of rotation of the double hook. The load hook attachment takes place in a known manner by means of hook nut 11 and nut lock 12th

A detailed illustration of the inventive hook traverse in different views is given in FIG.

Claims (1)

z </ red, claim Hakentraverse for Üoppelhaken on hoists with hook bottles or Mehrseiltraversen, preferably two-way traverses characterized in that they from a truss ball (3) with two of these ¹ ? opposite to each other arranged pivot pin (4), in which perpendicular to the pivot pin (4) a continuous special bore (5) was introduced, which in the current spherical radius r an oval and in the center of the sphere has a circular shape whose diameter in the center of the ball and its width in the current spherical radius r corresponds to the diameter of the hook shank (6) and whose greatest mutual deviation ot from the vertical ball axis is 8 ° in each case, that the hook crosspiece is received by two hemispherical sliding shells (7) and (8) and that by the hemispherical sliding shells ( 7) and (8) and the traverse ball (3) through the hook shank (6) of the double hook is inserted. *
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