JP2538412Y2 - Device for attaching and detaching jib to the end of telescopic boom - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for attaching and detaching a jib to and from a tip of a telescopic boom.

[0002]

2. Description of the Related Art A method of attaching a cylinder with a link or a sheave to the head of a telescopic boom, pulling the jib with a winch rope, and fixing the jib with a pin has been used. However, there are drawbacks such as the equipment becoming complicated, easily breaking down, and the weight of the telescopic boom becoming heavy.

There is also a problem that the operation procedure is complicated and lacks stability, so that the operation must be repeated (Japanese Patent Application Laid-Open Nos. 2-175593 and 2-182695).

[0004]

A jib can be easily attached and detached without the assistance of other crane or the like, and a jib can be attached to the end of a telescopic boom which does not use a complicated device and has little trouble. It is an object of the present invention to provide a desorption device.

[0005]

Means for Solving the Problems The telescopic boom 1 has a pair of left and right pin holes A at the top, and another pair of pin holes C provided below the pin holes A. It has a pair of pin holes B and another pair of pin holes D provided below the pin holes B. Pins are inserted into a pair of left and right pin holes A on the telescopic boom 1 side and a pair of pin holes B on the jib 3 side. 7 into the pair of pin holes C on the telescopic boom 1 side and the pin holes D on the jib 3 side.
In the apparatus for attaching and detaching the telescopic boom 1 and the jib 3 to be inserted and connected to each other, a support 4 for supporting the jib 3 having a horizontal movable base 6 and a pair of upper and lower movable bases 5 on the horizontal movable base 6 is provided. Hook pieces 2b provided on both sides of the top of the telescopic boom 1
The detachable device comprises a pair of flexible suspenders 2 having the same length and having rings 2a at both ends for hooking on hooks 2c provided on both sides of the base of the jib 3. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a boom, and 2 denotes a flexible suspending device consisting of a wire rope or the like to be locked on both sides of the top of the boom 1, having hooking rings 2a at both ends. ing. Hook pieces 2b and 2c for hooking the ring 2a of the flexible hanging member 2 are fixed to both sides of the boom side and the jib side, respectively. 3 is a jib. Two flexible suspenders 2 having the same length are provided for lifting the jib 3.

Reference numeral 4 denotes a frame for supporting the jib 3 (FIG. 3), and a cylinder 6a or a horizontally movable table 6 driven manually is provided at the top. An upper and lower movable table 5 driven by a cylinder 5a is provided above the horizontal movable table 6.

A is a pin hole provided on a pair of left and right brackets provided at the top of the boom 1, and B is a pair of pin holes provided on the end of the jib 3. Pin 7 (FIG. 4) is inserted and connected. C is a pin hole provided below the pin hole A on the boom 1 side, and D is a pin hole provided below the pin hole C on the jib 3 side.

(Attaching order) 0) The jib 3 and the boom 1 on the truck bed are aligned in the front-rear direction, and the tip of the boom 1 is brought above the base of the jib 3. 1) The ring 2 of the flexible hanging member 2 is attached to the hook 2b of the boom 1.
a (FIG. 1), and the other side is a hook 2 of a jib 3.
c (FIG. 2). 2) Raise the telescopic boom 1 and lift the jib 3. Then, since it is hung by the pair of flexible hanging members 2 of the same size, the pin holes A and C of the telescopic boom 1 and the pin holes B and D of the jib 3 automatically become parallel (FIG. 2). 3) In order to maintain the relative position between the jib 3 suspended by the telescopic boom 1 and the telescopic boom 1, the horizontal movable table 6 and the vertical movable table 5 on the gantry 4 are moved and adjusted. Supports jib 3 (FIG. 3). 4) Then, the flexible hanger 2 is extended from the telescopic boom 1 and the jib 3.
Remove. 5) Telescopic boom 1 for connecting telescopic boom 1 and jib 3
Face down (FIG. 4). The pin holes A and B of the telescopic boom 1 and the jib 3 are aligned, and the pin 7 is inserted into the pin holes A and B from the side. 6) Next, the telescopic boom 1 is raised, the pins 8 are inserted from the side with the pin holes C and D also aligned, and the telescopic boom 1 and the jib 3 are completely connected and fixed by the upper and lower pins 7 and 8.

[0010]

[Effect] If a flexible suspending device 2 of the same size and a gantry 4 having horizontal and vertical movable tables 6 and 5 are prepared, then the boom 1 is raised by its own power and is parallel and twist-free. Since the pin connection can be easily performed in the state, 1) the jib 3 can be easily attached and detached without assistance of other crane or the like. 2) Since the device is simple, there is no need to worry about failures, so maintenance is easy.

[Brief description of the drawings]

FIG. 1 shows a state in which a wire rope is hung on a boom.

FIG. 2 shows a state where a jib is lifted by a boom via a wire rope.

FIG. 3 shows a state where the jib is placed on a gantry.

FIG. 4 shows a state in which an upper connecting portion between the boom and the jib is to be connected by a pin.

FIG. 5 shows a state in which the boom is raised and the lower connection part of the boom and jib is connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Boom 2 Flexible hanging tool 2a Ring 2b, 2c Hook piece 3 Jib 4 Stand 5 Vertical movable platform 5a, 6a Cylinder 6 Horizontal movable platform 7, 8 pin A, B, C, D pin hole

Claims (1)

(57) [Scope of request for utility model registration] The telescopic boom (1) has a pair of left and right pin holes (A) at the top thereof and another pair of pin holes (C) provided below the pin holes (A). 3) a pair of left and right pin holes (B) at the base of the telescopic boom (1) side, having a pair of left and right pin holes (B) at the base and another pair of pin holes (D) provided below the pin holes (B). The pin (7) is inserted through the pair of pin holes (B) on the hole (A) and the jib (3) side, and the pair of pin holes (C) on the telescopic boom (1) side and the pin hole on the jib (3) side. A telescopic boom (1) in which a pin (8) is inserted into (D) to be connected.
And a jib (3) for attaching and detaching the jib (3), comprising a horizontal movable table (6) at the top and a pair of vertical movable tables (5) on the horizontal movable table (6). And hook pieces (2b) provided on both sides of the top of the telescopic boom (1).
And hook pieces (2c) provided on both sides of the base of the jib (3).
And a pair of flexible suspenders (2) having the same length and provided with rings (2a) at both ends for hooking the jib to the telescopic boom tip.