KR200245018Y1 - An extension equipment of ladder truck - Google Patents

Abstract

The present invention relates to the construction of a multistage boom of a ladder car, and in particular, the stepwise expansion of the multistage boom for the work is carried out quickly and accurately, and the weight and volume are reduced according to the simplification of the structure for the construction of the multistage boom, and the installation and installation in a compact car accordingly Productivity and maintenance are to facilitate.

In order to realize the object of this paper, as a means, a plurality of ladder buoys 212,213,214,215, which are assembled in such a manner that another ladder buoy adjacent to the inside of one ladder buoy is slide-inserted, and the ladder buoys 212,213,214,215 simultaneously In the stretching device of the ladder car multistage boom consisting of a wire for extending and inserting the same length, and the hydraulic drive unit for sliding the ladder boom (212, 213, 214, 215) through the wire to control the expansion and contraction of the entire length,

The hydraulic drive unit is provided with a safety valve 204 and a throat valve 205 in the hydraulic pipe 203 receives the hydraulic pressure from the main valve 201 and the shaft axially coupled to rotate the guide pulley 211 at both ends ( And a hydraulic cylinder 202 welded to the working rod 209 in the transverse direction.

Coupling the fixed bars (216a, b, c, d) in the transverse direction to the middle of the ladder buoy 212,213,214,215, respectively

The wire is provided at the upper end of the guide pulley 211 and the first stage ladder buoy 212, one end of which is fixed to the upper end of the first ladder ladder 212 and built on the shaft 210 of the operation rod 219. After winding the guide pulley 222, two rows of drive wires 217 fixedly connected in parallel to the bottom of the second ladder buoy 213 and three consecutive ladder buoys 212, 213, 214, and (213, 214, 215) of the ladder buoys. Ladder car multi-stage with two rows of extension wires (218,219) and one row of retraction wires (220,221), with one end connected to each other and fixed to the fixed bars (116a, b, c, d). Provides extension equipment for booms.

Description

Expansion equipment of ladder car multistage boom {AN EXTENSION EQUIPMENT OF LADDER TRUCK}

The present invention relates to a stretching device of a ladder car multi-stage boom, the step-by-step expansion of the multi-stage boom for the ladder car is made quickly and accurately, and the weight and volume reduction according to the simplification of the structure for the construction of the multi-stage boom is easy and productivity and maintenance accordingly It relates to the expansion device of the ladder boom.

In general, ladder multi-stage booms are extended to draw out a number of booms in the longitudinal direction step by step, seated in the building and used for loading and unloading work, such as moving or cargo, it is usually a crane or expensive of trucks so that the heavy loads can be easily moved to a high position It is used as a ladder truck.

At this time, the multi-stage boom used to be applied to the crane or elevated ladder is pulled out in the longitudinal direction of the plurality of booms are installed in a structure that can be pulled out so that the length can be extended and by the winding force of the wire position using hydraulic Withdrawal was made, and each of the plurality of booms was connected with a wire to be stepped up and down in connection with the boom which is pulled out by the winding force of the wire winch.

Meanwhile, as shown in FIG. 1, the wire winch 100 includes a winding drum 102 for winding the wire, a motor 104 for rotating the wire 104, and a brake 106 for controlling the driving force. It is operated by the hydraulic pressure supplied from 110 and when an abnormality such as leakage of hydraulic pressure occurs, the brake valve 108 for restricting the operation of the wire winch 110 is connected to the hydraulic line composed of the main valve 110. The operation of the wire winch 100 is controlled by the supplied hydraulic pressure and the boom stand is drawn out by the winding force of the wire winch 100 so that the length of the boom stand can be extended.

At this time, the main valve 110 is supplied with hydraulic pressure from the supply unit 120, such as a hydraulic pump, and the angle cylinder 124 and the support cylinder 126 for angle adjustment and the carriage car position 122 is elevated along the multi-stage boom The hydraulic pressure was supplied to each unit so that the individual operation of each part was made.

However, such a general wire winch 100 is the driving force of the motor 104 is driven by the hydraulic pressure supplied from the main valve 110, and the winding drum 102 connected thereto is wound around the winding drum ( Withdrawal of the boom is made by the tension force of the wire wound on 102, and the length of the multi-stage boom is extended as a plurality of booms that are configured to take out the boom in stages are sequentially drawn out.

At this time, the wire wound by the wire winch 100 and the wire to transfer the tensile force to the boom is switched to the direction of the tension by a plurality of rollers are guided to take out the boom.

Accordingly, the general lifting device using the wire winch is such that the wire wound according to the operation of the wire winch is pulled out by pulling the boom and the wire wound according to the operation of the wire winch proceeds in close contact with the roller. Damage to the wires and uneven wear of the rollers have occurred, and in particular, very serious problems are generated that lead to serious problems such as wire cutting.

In addition, the number of parts according to the need for a number of components, such as a cable winch made of a motor, a winding drum, a brake, etc. configured to take out the boom, a wire wound on the wire winch, and a plurality of rollers for guiding the same. The increase and the load was raised as a factor, and there was a problem that the maintenance is not easy accordingly.

Therefore, the present invention is intended to solve the problems as described above to prevent damage to the cable and uneven wear of the roller and to take out the boom can be made quickly, and to assemble by simplifying the structure and the number of parts of the expansion device for the boom pull out It is an object of the present invention to provide a telescopic ladder of a multistage boom for ladders, which is easy to maintain and maintain, and to reduce the load due to the reduction of the number of parts.

In order to achieve the above object, the present invention provides a hydraulically driven ladder car in a multistage boom expansion and contraction device, a hydraulic cylinder in which an operating rod linearly reciprocates a certain stroke, and a wire connecting a plurality of ladder buoys is a driving wire and an extension wire. And a retraction wire, and by connecting the drive wire and the hydraulic cylinder, a plurality of ladder buoys are interlocked so that the entire length can be controlled.

1 is a circuit diagram of a stretching apparatus for stretching a general multi-stage boom.

2 is a circuit diagram of a hydraulic drive unit according to the present invention.

3 is a combined state diagram of the multi-stage ladder boom and the hydraulic drive unit according to the present invention.

***** Detailed description of symbols for important parts of the drawings *****

202: hydraulic cylinder 204: safety valve

205 throttle valve 210 shaft

212,213,214,215: Ladder pour

216a, b, c, d: fixed bar 217: drive wire

218, 219: extension wire

220,221: RETRACTION WIRE

Hereinafter, the configuration and operation of the present invention with reference to the accompanying drawings 2 and 3 as follows.

2 is a circuit diagram of the hydraulic drive unit according to the present invention, Figure 3 is a diagram illustrating a combined state of the multi-stage ladder boom and the hydraulic drive unit according to the present invention.

The present invention is a ladder car multistage boom formed with a plurality of ladder buoys and wires connecting the ladder buoys and the hydraulic drive unit for controlling the expansion and contraction length of the ladder buoys in connection with the wire as shown in Figures 2 and 3 In the stretching device of,

As shown in FIGS. 2 and 3, the hydraulic drive unit includes a hydraulic cylinder 202 supplied with hydraulic pressure from the main valve 201 to a hydraulic pipe 203, and a safety valve 204 connected to the hydraulic pipe 203. ) And the throttle valve 205 are installed.

Reference numeral 206 denotes a hydraulic supply, and 207 denotes a support cylinder for supporting a ladder boom.

The hydraulic cylinder 202 is the shaft rod 210 is axially coupled so that the guide pulley 211 is rotated at both ends are welded to the center portion of the operating rod 209 in the transverse direction, the operating rod 209 toward the tip. The cylinder 208 is installed on the bottom of the ladder boom in the longitudinal direction so as to extend.

In the plurality of ladder buoys, a second ladder buoy 213 is inserted into the first ladder ladder 212, and a third ladder buoy 214 is inserted into the second ladder buoy 213. The third ladder buoy 214 inside the fourth ladder ladder 215 is repeatedly repeated in the manner in which the sulide is inserted, the plurality of ladder buoys are assembled by antenna folding, the middle portion of the plurality of ladder buoys The fixed bar (216a, b, c, d) is fixed to the horizontal installation (hereinafter, it will be described assuming that the ladder buoy of the expensive ladder vehicle according to the present invention consists of a total of four ladder buoys.)

The wire is the drive wire 217, the extension wires 218 and 219, and the retraction wires 220 and 221. The drive wire 217 is made up of two parallel wires, and the two wires of the drive wire 217 are once The guide pulley 211 fixed to the upper end of the first ladder ladder 212 and arranged on the shaft 210 of the operating rod 219 and the guide pulley 222 provided on the upper stage of the first ladder ladder 212. The guide pulleys 211 and 222 are hung in turn, and then fixedly connected in parallel to the lower end of the second ladder ladder 213. The extension wires 218 and 219 are made of two parallel wires. One end of the second line is fixed to the fixing bar 216a of the first step ladder buoy 212 and the other end across the guide pulley 223a provided on the upper end of the second step ladder buoy 213 to the third step ladder buoy ( 214 is fixedly connected in parallel to the bottom of the extension wire 219 is a two-wire parallel wire One end of the second row is secured to the fixing bar 216b of the second ladder ladder 213 and the other stage spans the guide pulley 224a provided at the upper end of the third ladder ladder 214. It is fixedly connected in parallel to the bottom of the ladder buoy 215, the retraction wire 220, 221 is disconnected in one end of the retraction wire 220 is fixed to the top of the first ladder ladder 212 and the second end However, the other end is fixedly connected to the fixing bar 116c of the third step ladder 214 over the guide pulley 223b provided at the bottom of the ladder boom 213, and the retraction wire 212 has one end thereof. The other end is fixed to the top of the second ladder buoy 213 and fixed to the fixing bar 116d of the fourth ladder buoy 215 across the guide pulley 224b provided at the bottom of the third ladder buoy 214. Connect.

The three successive ladders 212, 213, 214, and 213, 214, 215 form a set.

Referring to the operation of the present invention made in this way as follows.

The ladder boom is extended to operate the hydraulic cylinder 203 in a state in which each ladder buoy is slide-inserted into another adjacent ladder buoy and the entire ladder buoy is contracted. As protruded as possible.)

First, by operating a switch (not shown), hydraulic pressure is applied from the main valve 206 through the hydraulic line 203 to the cylinder 108 so that the driving rod 109 contracts into the cylinder 108, and the driving wire is as long as the length thereof. 217 is pulled toward the bottom of the bottom of the first ladder ladder 212 and pushes the bottom of the second ladder ladder 213 toward the top of the first ladder ladder 212.

The second ladder buoy 213 is pushed toward the upper end of the first ladder buoy 212 and at the same time the lower end of the third ladder buoy 214 by the extension wire 218 second ladder buoy 213 At the same time, the lower end of the fourth ladder ladder 215 is pushed toward the upper end of the third ladder ladder 214 by the extension wire 219 to extend the entire length.

At this time, the hydraulic pressure supplied to the hydraulic cylinder 202 by the safety valve 204 installed in the hydraulic line 203 is applied to the main valve 206 by the reaction force applied according to the lowering operation of the operation rod 109. By preventing leakage, the rising of the lowered hydraulic cylinder 203 is prevented.

In addition, according to the adjustment of the throttle valve 205, the amount of hydraulic pressure supplied to the hydraulic cylinder 202 is controlled to adjust the operating speed of the operating rod 209.

Thereafter, when the operation rod 209 protrudes from the cylinder 208 by operating a switch (not shown), a plurality of ladder buoys are inserted into the ladder buoys adjacent to the lower side so that the entire length is contracted.

That is, the second ladder buoy 213 is the first ladder ladder 212 at the same time the third ladder ladder 214 is the fourth ladder ladder 215 to the inside of the second ladder ladder 213 Is continuously inserted into the third step ladder 214.

At this time, the retraction wire 220 pulls the third ladder buoy 214 by the insertion length of the second ladder buoy 213 inserted into the first ladder buoy 212, and at the same time The shunt wire 221 serves to pull the fourth ladder ladder 215 by the insertion length of the third ladder ladder 214 inserted into the second ladder ladder 213.

Thus, the plurality of ladder buoys are simultaneously inserted into the lower ladder buoys with the same insertion length so that the entire length is shrunk.

The present invention configured as described above installs a liter wire for controlling the slide insertion state of the ladder buoy and operates the driving wire by a hydraulic cylinder operated by hydraulic pressure. With the elimination of winches, the number of parts can be reduced, making it easy to assemble, maintain, and operate, and at the same time, reduce the overall weight of equipment and reduce manufacturing costs.

Therefore, the present invention has the advantage that it is easy to install in a small car as well as a large car.

Claims (1)

A plurality of ladder buoys 212, 213, 214 and 215 which are assembled in such a manner that the other ladder buoys adjacent to one ladder buoy are slide-inserted, and wires for simultaneously extending and inserting the ladder buoys 212, 213, 214 and 215 in the same length. In the ladder car multi-stage boom expansion unit consisting of a hydraulic drive unit for sliding the ladder buoy (212,213,214,215) to control the expansion and contraction of the entire length through a wire, The hydraulic drive unit is provided with a safety valve 204 and a throat valve 205 in the hydraulic pipe 203 receives the hydraulic pressure from the main valve 201 and the shaft axially coupled to rotate the guide pulley 211 at both ends ( And a hydraulic cylinder 202 welded to the working rod 209 in the transverse direction. Fixed bars 216a, b, c, and d are fixed to the middle portions of the ladder buoys 212, 213, 214, and 215 in the lateral direction, respectively. The wire has one end fixed to the upper end of the first end ladder buoy 212 and provided on the upper end of the guide pulley 211 and the first end ladder buoy 212 arranged on the shaft 210 of the operation rod 219 After winding the guide pulley 222, two rows of drive wires 217 fixedly connected in parallel to the bottom of the second ladder buoy 213 and three consecutive ladder buoys 212, 213, 214, and (213, 214, 215) of the ladder buoys. Each connection is installed, but one end is fixed to the fixing bars (116a, b, c, d), it is characterized by having two rows of extension wires (218,219) and one row of retraction wires (220,221) arranged alternately Extension device for ladder boom.