KR200465878Y1 - Height adjustable upper limit swith for an aerial work plaform - Google Patents

Abstract

The present invention relates to an upper limit switch for preventing a ceiling narrowing accident of an aerial platform. The ceiling work involves attaching electric wires, lights, air conditioning ducts, and plumbing to a ceiling of a building and attaching a ceiling finishing material to cover them. The work platform needs to be kept at a suitable distance from the facility and the ceiling slabs and beams.
In other words, safety accidents may occur due to inadvertent operation of the operator, the upper limit limit switch is always attached to the aerial platform to prevent ceiling stenosis.
However, the ceiling work varies from site to site, so the position of the upper limit switch can not be fixed once and used, and if necessary, it may be moved at that time. Conventional upper limit limit switch can move the entire sensing rod, but the limit switch is attached to the sensing rod top and the wire is exposed to the bottom, there is a problem that it is difficult to protect the wire.
In order to solve this problem, the present invention allows the sensing rod attachment to be adjusted in multiple stages according to the ceiling working conditions, and the limit switch is placed at the bottom of the sensing rod to connect the wires to the conduit to protect it.

Description

Multi-stage adjustable upper limit switch on aerial platform {Height adjustable upper limit swith for an aerial work plaform}

The present invention is to provide a height adjustable upper limit switch for aerial work platform.

There are many tasks such as electrical work, lighting, ducts, plumbing, and ceiling finishing materials.In the ceiling, there are so-called stenosis accidents such as a person's head hitting the ceiling during work due to obstacles such as slab beams and plumbing. There is.

That is, as shown in Fig. 1, due to inadvertent operation of the operation or the workpiece touches the operation lever during operation may cause a stenosis due to unintended operation, the upper limit limit switch 400 is attached to the aerial platform to prevent ceiling stenosis accident It is supposed to be done.

However, as the working conditions vary from site to site, over-limit limit switches must be able to easily adjust the position of the limit switch and protect the wires as they are electrically operated.

There is an example of a pole type upper limit limit switch is disclosed in the aerial platform, as shown in [Fig. 2] that two or more sensing rods are placed in the corner of the workbench railing, or the worker does not use it as it is once fixed, and the fixing part is arbitrarily fixed according to the work. In some cases, the detection height may be adjusted. Sometimes work is finished and the poles are unwrapped and laid on the floor. There is a drawback that the wire 430 exposed at the bottom of the sensing pole is caught in the workpiece and damaged at work.

 The tip of the sensing rod is also so sharp that it may miss through the hole. In addition, since the limit switch is directly on top of the sensing rod, the wire is long, and when the height is adjusted, the wire 430 exposed to the lower end of the sensing rod moves together, which makes it difficult to protect the wire by putting it in the conduit.

 Techniques for preventing ceiling stenosis accidents in aerial platform has been disclosed to prevent ceiling crushing accidents in aerial platform by installing two or more pole-stage limit switches.

 There are cases where height work is required because the height of the aerial work is diverse. This is because there is no height adjustment function, so the work can be fixed and moved randomly. will be.

Aerial platform with crimp prevention device (registered patent 20-0445916)

As mentioned above, in order to solve the problem of the upper limit switch of the aerial platform, the limit switch attachment that can adjust the sensing height is required on the working platform.At the same time, even if the height is adjusted according to the working conditions, the lower wire is inserted into the conduit at the same time. It must be protected so that the wires are not damaged in material or on foot. In addition, the sensing unit should allow the approaching object to come into contact with the surface as it rises.

Previously, the design of the upper limit of the limit switch in the ceiling work can not be fixed once used to move the site according to the situation, the present invention is intended to make the height easier.

 In addition, in the conventional crimp prevention accident, the limit switch is attached to the upper end of the sensing rod, and the wire is long and the upper limit limit switch is exposed when the operator adjusts the height, so that the wire is stretched along with the pole pole 420 so that the wire 430 needs to be protected. The present invention, which is located under the sensing rod, is not intended to expose the wires.

3 and 4, the present invention has a sensing unit 410 at the top and the telescopic telescopic attachments (411, 412, 413, 414) formed guide (421, 421 ', 421 ") formed It is intended to solve the above-described problem by providing a set of sensing tables 420 sealed in the back cover 429 by putting the box 420 and the spring 417 and the limit switch 418 therein.

The present invention secures a set of two or more multi-stage sensing table 420 in the corner of the workbench 300, railing 301 with the bracket 441 and the bolt 442, and then the wire 430 passes through the bottom corner of the workbench 430 When the work bench 300 is raised by the lever 502, the sensing table sensing unit 410 touches the ceiling object, and the attachments 411, 412, 413, 414 push the spring 417 and the pushing force is a four-stage lower pusher. 416 pushes the lever 419 of the limit switch 418 to immediately stop further rise, while the wire 430 is protected by the conduit 431 to the workspace and is not exposed.

In addition, the present invention is to adjust the attachments (411, 412, 413, 414) because it is possible to adjust the height of the lock (411B) by pulling out all the signs (411) or 412 if the lack of the sign (412) if it still needs to adjust the bolt 41B. It's easy.

1 is an exemplary view of the ceiling narrowing accident of aerial platform.
2 is a diagram illustrating a conventional upper limit switch.
3 is an exemplary view of the present invention
4 is a detailed illustration of the present invention, "a" is an assembly view with the limit switch attachment, "I" is an attachment, "a" is an assembly front view.
5 is a detailed illustration of the present invention, "a" is an attachment guide box detail view, "I" is a retracted attachment, "da" is a limit switch operation example.

The present invention has a sensing unit 410 at the top as illustrated in [4] and [FIG. 5] and the attachments 411, 412, 413, 414 which are telescopic telescopic adjustments are attached to the guides 421, 421 ', 421 ". Into the box 420, a spring (417) and a limit switch (418) underneath it, covered with a rear cover (429) to make a set of sensing rods (420) bolted to the holes (423):

As shown in the example of FIG. 3, two or more sets of multi-stage sensing tables 420 are fixed to the corners of the railing 301 of the work bench 300 with the bracket 441 and the bolt 442, and then the wire 430 is the bottom corner of the work bench. Pass into the conduit 431 passing through and lock with a union (432).

 When the work table 300 is raised by the lever 502, the sensor table sensing unit 410 touches the ceiling object during excessive rise, and the attachments 411, 412, 413 and 414 push the spring 417 and the pushing force is the four-stage pusher 416. Push the lever 419 of the limit switch 418 to stop further ascent electrically and at the same time the wire 430 is protected from work and not stepped on during the work

100 Balance
200 lifts
210. Cylinder 220. Caesars lift
300 working table
301. Upper Railings
400 upper limit switch section
410. Sensor 411. 1 stage attach 412. 2 stage attach
413. Three-speed attach 414. Four-speed attach
416. Pusher 417. Coil Spring 418. Limit Switch
419.Limit switch lever 41A. Spring pusher 41B. Stop Bolt
41C. Stop Jaw 41N. nut
420. Attach box 421. Top guide 421 '. Middle guide
421 ". Spring seat 422.422 '. Guide hole 424. Coupling bolt hole.
4LS. Limit switch house 423. Combined wings
429. Rear cover 430. Wires 431. Conduit
432. Union 441. Mounting brackets 442. Mounting bolts
500 control panel 501. control panel 502. joystick lever
600 ceiling interference water
601. Bo 602. Ceiling Fixtures

Claims (2)

The attachment 411, 412, 413, 414, which has a sensing unit 410 at the top, and which can be secured with a telescopic adjustment and bolt 41B, is placed in the box 429 to which the guides 421, 421 ', 421 "are attached, and the spring 417 at the bottom of the box 420. ) And a limit switch 418 to complete the set of detectors 420 sealed with a rear cover 429:
Workbench 300 Secures two or more sets of multi-stage sensing tables 420 in the corners of railing 301 with bracket 441 and bolts 442 and puts the lower wires 430 into conduit 431 from the workpiece. After the protection, when the work table 300 is raised with the lever 502, if it rises excessively, the end of the sensing table detector 410 touches the ceiling object, and the multi-stage attachments 411, 412, 413, 414 contract the spring 417 and the four-stage attachment. A pusher 416 of 414 pushes the lever 419 of the limit switch 418 to electrically stop the lifting operation of the platform, multistage adjustable upper limit switch of the aerial platform. The multi-stage adjustable upper limit switch of claim 1, wherein the upper part of the set of sensing tables has a disk-shaped light detecting unit.

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