SU1351869A1 - Boom cargo-hoisting device - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to the field of lifting and transport machinery, in particular to boom lifting devices. The purpose of the invention is to increase reliability. The boom 3 is mounted on the column 2. The flexible organ 5 is connected to a load-gripping organ bis counterbalance 7, made with teeth, with which the spring-loaded latches 10 of the U-shaped lever alternately interact. 9. When moving the load 16, the latches 10 of the lever 9 interact with the teeth 12 of the counterweight and limit its speed of vertical movement. 2 Il. (L SA SP 00 05 SB /// f / f / f /////// Fig 1

Description

one

FIELD OF THE INVENTION The invention relates to a lifting and transport machinery, namely to boom lifting devices.

The purpose of the invention is to increase the reliability of the device.

FIG. 1 shows the device, a general view; in fig. 2 is the same as the embodiment.

The boom lifting device comprises a column 2 mounted on the base, in the upper part of which an arrow 3 is fixed. On the boom 3 there are installed deflecting blocks 4 for a flexible organ 5 connected with a lifting body 6 and a counterweight 7 located in the vertical guides 8 of the column 2 The i-shaped lever 9 is hinged on the base 1 under the counterweight 7 and is made with spring-loaded latches 10 mounted on the axis x 11 at the ends of the lever 9 with the possibility of one-way rotation. The counterweight 7 is made with teeth 12. A vertical displacement limiter of the counterweight 7 includes a flexible member 13, (FIG. 1) connected to the control knob 14 and with a rotatable spring-loaded lever 15, in which the counterweight 7 abuts. 2, a trolley 17 is installed under the load 16, and the load 16 interacts with a pivoting support 18 with a manual drive 19. The load 16 enters the section along an inclined guide 20. In the column 2, shock absorbers 21 are installed for the lever 9.

The device works as follows.

The load 16 is guided along the guide 20 onto the parcel. The load gripping body 6 seizes the load 16, and the opera 3518692

A rattor with a handle 14 or a driver 19 removes the vertical movement of the counterweight 7 from the action. The load-counterweight system is balanced and under the action of insignificant force from the operator begins to move down (Fig. 1) or up (Fig. 2). When moving the protivik 7 weight 7, alternately spring-loaded latches interact with its teeth 12. 10 lever 9, which limits the speed of movement of the counterweight. For placing the load 16 on the trolley

15 of FIG. 1, the boom 3 is required to unfold, after which the weight 16 is lowered. According to FIG. 2, the load 16 is lowered onto the trolley 17 without first lifting and turning it.

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Formula of invention

A jib lifting device, containing a column mounted on the base, in the upper part of which a boom is fixed, deflecting units mounted on the boom and bending around a flexible body that connects the valuable body and

It is opposed to a weight located in vertical directions of the columns, which is characterized by the fact that, in order to increase reliability, it is equipped with a U-shaped lever, hinged on the base under the counterweight, spring-loaded latches, mounted on the axes at the ends of the i-shaped a lever with the possibility of one-sided rotation, and a controlled limiter for the vertical movement of the counterweight, the latter being made with the teeth with which the latches are connected.

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Claims (2)

Claim Boom single-turn lifting device. The counterweight 7 is made with teeth 12. The limiter of vertical displacement · the counterweight 7 includes a flexible body 13 (Fig. 1) connected to the control handle 14 and with a rotary spring-loaded lever 15, in which the counterweight 7 rests. In FIG. 2, a trolley 17 is installed under the load 16, and the load 16 interacts with a rotary stop 18 with a manual drive 19. The load 16 enters the section along the inclined guide 20. In the column 2, shock absorbers 21 for the lever 9 are installed. The device operates as follows. The load 16 along the guide 20 enters the site. Lifting body 6 captures load 16 and ope25 GUSTs comprising mounted on axes · Considerations column, the top of which is fastened arrow diverting pulleys mounted on the boom and the envelope flexible body Cpd ₃₀ nennym with a lifting body, and a counterweight disposed in vertical guides columns, characterized in that, in order to increase reliability, it is equipped with a U-shaped lever, a hinge ³⁵ but fixed to the base under the counterweight, spring-loaded latches mounted on the axes at the ends of the U-shaped lever yeah, with the possibility of one-sided rotation, and a controlled limiter of vertical movement of the counterweight, the latter being made with teeth, to which the latches are connected.