CN87211783U

CN87211783U - Electric controlled safety door of construction platform passage way

Info

Publication number: CN87211783U
Application number: CN 87211783
Authority: CN
Inventors: 车春来
Original assignee: Machines And Tools Renting Station No4 Co Of China Building Bureau No1
Current assignee: Machines And Tools Renting Station No4 Co Of China Building Bureau No1
Priority date: 1987-08-10
Filing date: 1987-08-10
Publication date: 1988-05-04

Abstract

The utility model belongs to a construction scaffold safety door. Most of the existing scaffold safety doors are hand driven, and has the defects of rough structure and inconvenient use. The utility model is provided with a rod arranged on the lifting cradle, a transversal bar arranged on the port of the scaffolding and a control circuit, thereby, the automatic opening and closing of the safety door are realized, and the display with sound and light is additionally provided. The utility model has the advantages that the actual safety effect of the safety door is enhanced and the cost of the device is low.

Description

Electric controlled safety door of construction platform passage way

The utility model belongs to a kind of building operation raising legs safety door, mainly is applicable to the porthole safety precaution of operation platform.

In present building operation, various raising legss use quite extensive, fail to take effectively safeguard procedures but operation platform and raising legs hang the porthole of intersecting on the hurdle always, therefore become the place's hidden danger in the construction safety.Existing channel security door majority is comparatively simple and crude, come switch by the people, uses comparatively trouble.

In order to address this problem, the utility model proposes a kind of electric-controlled type operation platform channel security door.The principal feature of this safety door is to adopt circuit control, and does not need the workmen to start.

The utility model is described in further detail below with reference to Fig. 1 a Fig. 1 b.Among the figure: 1, scaffolding steel pipe 2, springboard 3, track 4, cross tube 5, sheer pole 6, clamping plate 7, hang hurdle 8, spider 9, connecting angle 10, rod axle 11, rod 12, electromagnet cover 13, steel rope 14, extension spring 15, electromagnet 16, lever

Essence of the present utility model is: adopted two can upper and lower activity protection railing, above one longer, below one piece shorter.Two load of cross tube (4) is on scaffolding steel pipe, sheer pole (5) drops on the special-purpose clamping plate (6) of steel pipe, make the upper and lower in orbit slip of cross bar and can not fall down, when opening owing to be installed in two rods (11) that hang on the hurdle (7) and provoked in company with the rising of hanging hurdle (7).When hanging hurdle (7) decline, two movable railings play protective action in company with falling.The height of two movable railings should be identical with the height of other fixed railing.Two rods (11) that hang on the hurdle are fastened on the rod axle (10), and the bearing frame at axle two ends is welded on the angle steel (9), and the spider (8) that supports angle steel is fastened on and hangs on the hurdle (7), has a groove on the bearing frame, rotates flexibly like this.There is torque arm at the two ends of axle, hold with spring (14).Two rods in both sides are affected by steel cable (13) by electromagnet.When electromagnet was not switched on adhesive, because torque arm is sagging, rod straight up.It is upper and lower unaffected to hang the hurdle like this.When electromagnet (15) energising adhesive, rod just stretches out by vertically rotating 70 ° of angles forward, and the extension spring of torque arm at this moment (14) tension just can be provoked cross bar.The effect of extension spring (14) is to prevent that the careless manipulation rod from choosing steel pipe (1), springboard (2) etc., and is unlikely to damage rod (11), rod axle (10) etc.

A limit switch all is housed on every layer of column of portal frame, and it has double action, by the conversion of switch, controls electromagnet and magnetic starter simultaneously.

Below with reference to Fig. 2 a Fig. 2 b circuit part is illustrated.Among Fig. 2 a one or six floor circuit embodiments, among the figure: DCT-electromagnet K _1-4-toggle switch

KB-control transformer XWK _1-4-travel switch

SJ-time relay AN _1-4-button switch

ZJ-intermediate relay XD _1-4-signal lamp

LJ-current relay RD _1-2-fuse

The electrical appliance part principle of work:

Work as K _4a, K _6bConnect, hang the hurdle and rise to the 4th buildings, the XWK cut-in tension is by XWK ₃, K _4a, SJ counter-rotating magnetic starter normally closed interlock FC forms the loop, time relay energising adhesive, its contact of not delaying time has been a holding function, the assurance time relay is in rod adhesive reliably in the past.String is at the normally closed interlock of the ZJ in this loop, SJ is discharged, have only this moment an indicator lamp to show, after the time relay adhesive several seconds, hang the hurdle and rise to below the safety rails of roofing, the time-delay contact closure of SJ at this moment, electromagnet energising adhesive, rod stretches out, along with the rising safety rails of hanging the hurdle is lifted; Meet XWK when hanging the hurdle ₄The time, voltage is by XWK ₄, K _4a, ZJ forms the loop, the intermediate relay adhesive, its normally closed contact that is connected on winch rising magnetic starter ZC self-keeping circuit disconnects, the ZC outage stops to rise.

When hanging hurdle decline, the normally closed contact that is connected on the decline magnetic starter FC of SJ wire loop disconnects, not adhesive of SJ, and deadweight keeps position straight up to rod by spring.

If K _1-4All in the inoperative position, as seen from the figure, intermediate relay is adhesive just, and the just impassabitity self-locking adhesive of magnetic starter ZC of rising like this so winch can not turn round continuously, is reminded the operating personal select switch.

All bell pushs are by the current relay power supply, and any one button is connected, and electric current forms the loop by LJ-AN-R-XD, all can make the LJ action, and electric bell rings, and indicator lamp is bright.

The effect of just changeing magnetic starter ZC normally open contact that is connected in the time relay sj self-locking circuit is: when avoiding the workmen by bell push, make the time relay adhesive produce misoperation, as shown in the figure, when the workmen pressed push button, electric current was by normally closed interlock-LJ-AN of ZC ₃-XWK ₃-R ₃-XD ₃Get back to transformer secondary output, at this moment the bell ring lamp is bright.Because the not adhesive of ZC of SJ self-locking circuit is not so SJ can adhesive.And when hanging the hurdle when up, the ZC closure makes self-locking form path.But at this moment the ZC normally closed interlock in LJ loop disconnects, and it is invalid at this moment to press electric bell, avoids taking place misoperation.

Claims

1, a kind of building operation raising legs safety door, the rod (11) that it is characterized in that controlling the safety door switch are mounted in and hang on the hurdle (7), and safety door cross tube 4, sheer pole 5 are arranged on the lifting porthole of every layer of scaffold, and can slide in track (3); The on-off action of safety door is by control circuit control electromagnet (15) action, this two actions conversion of motor automatic stop.

2, raising legs safety door according to claim 1, it is characterized in that: the control path of safety door each floor all by a link tester cross the limit switch that is contained on the raising legs, hang electromagnet on the hurdle and relay, bulb, electric bell etc. form control path, the action of control rod, motor automatic stop, light demonstration and will expect the mode of operation of bell ring.