CN2469108Y - Friction and self-locking type falling-down proof safety device for electrically lifting/lowering scaffold - Google Patents

Abstract

The prior falling proof safety device breaking has the disadvantages of large volume, complex structure and difficulty in installation and maintenance. The utility model is characterized in that a right-angled trapezoid frustum of pyramid empty cavity is arranged in the shall; a pair of strip-formed notch parallel to inner incline wall surface is provided throughout a pair of right-angled trapezoid vertical wall; rollers connected with the inclined wall and falling proof pulling rod are provided in the cavity, with the roller fixing axis protruding from the notch; a handle is arranged on the tail end outside the shell, while a rotating shaft is arranged at the back part and a fork with a fork port is provided at the front end; the fork port is provided with the roller fixing axis; the fork is fixed on the shell via rotating shaft support, and the lower end of the handle and the bottom face of the shall are provided with strings. The utility model has the advantages of small volume, light weight, simple structure, sensitive move, safety and reliability, ease in operation and low cost etc.

Description

Electric lifting scaffold friction self-locking formula falling-proof safety device

The utility model relates to a kind of electric lifting scaffold falling-proof safety device of constructions work safe construction.

At present, in construction work, begin to be extensive use of electric lifting scaffold and carried out operation.Falling-proof safety device, be essential important component in the electric lifting scaffold efficient public security system, its effect is when jacking equipment goes wrong, and pins the pallet of tenesmus fast immediately, stop pallet tenesmus support body to collapse and spoil, guarantee whole frame body safety, avoid the generation of falling accident.The existing falling proof device that uses of selling, ubiquity that volume is big, heaviness, complex structure, installation and maintenance inconvenience, operation easier is big, braking time is long and the high outstanding shortcoming of manufacturing cost.

Goal of the invention of the present utility model is: overcome the above-mentioned shortcoming that existing electric lifting scaffold falling proof device exists, for builing industry provides the friction self-locking formula that a kind of volume is little, in light weight, simple in structure, fitting operation is easy to maintenance, braking time is short, safe and reliable, cheap for manufacturing cost falling-proof safety device.

Goal of the invention of the present utility model realizes by implementing following technical proposals: electric lifting scaffold friction self-locking formula falling-proof safety device, by device case, the disk on the housing end face of being contained in that is used for tray, dress is inserted the assemblies such as fall arrest pull bar that run through housing disk end face and bottom surface and is constituted, and it is characterized in that: this device also includes the shift fork that the front end that is contained on the housing has prong, be contained in the shift fork rotating shaft at shift fork rear portion, be contained in the rotary shaft rack between this rotating shaft and housing, be contained in the shift fork handle of shift fork tail end, be contained in the spring between shift fork handle and housing bottom surface, and be contained in the endoceliac roller of shell; It is big to be shaped on bottom surface in the middle part of the end face disk middle part of housing and the bottom surface respectively, the square aperture that last disc face is little, enclosure interior is provided with square aperture up and down and connects, its three inside walls are vertical with the bottom surface, another side inside wall and bottom surface oblique, rectangular trapezoidal terrace with edge cavity, with the chamber on a pair of vertical inside wall of skew wall face about adjacent, have the bar shaped notch that a pair of perforation wall thickness parallels with interior skew wall face, the cylinder roller that two ends have fixed axis is contained in the housing chamber, the face of cylinder one side of roller is by pasting skew wall face in the chamber, the relative side fall arrest pull bar wall that reclines, the fixed axis at roller two ends respectively stretches out the bar shaped notch, and be stuck in outer two prongs of shift fork of housing, shift fork is fixed on two relative sidewalls of housing by the rotary shaft rack on it.Additional technical feature is: 1. constitute 11 °-18 ° angle between the vertical wall that the skew wall face in the device case chamber is relative with it; 2. dress is plugged in the pull bar in the pass-through facility housing, for having the fall arrest pull bar of square-section.Friction self-locking principle of the present utility model is as follows: when electrical scaffolding is in normal operating condition, spring in this falling proof device between handle and housing bottom surface is in free state, and the roller in the housing is positioned at the stenosis on inner slide top, chamber, is tightly blocked by frictional force between the skew wall face on two sides and fall arrest pull bar wall.When rising or decline electrical scaffolding, be subjected to the effect of electric block suspension hook steel cable pull unit handle in the jacking system, the spring that is contained between shift fork handle and housing bottom surface is stretched, simultaneously under the rotation of shift fork rotating shaft, shift fork pulling roller glides along inclined-plane in the chamber, the fixed axis at roller two ends then glides along the bar shaped notch, because cavity is up-narrow and down-wide, when roller glides, the gap has appearred between roller and skew wall and fall arrest pull bar, therefore whole device can move or move down on the fall arrest pull bar, thereby has driven pallet and the scaffold on it moves up or down, and is convenient to construction operation.If electric block draw angle with the shift fork handle between the steel rope breaking that is connected lost efficacy, spring between shift fork handle and housing bottom surface resets at once, the pulling shift fork promotes roller and moves up along inclined-plane in the chamber, housing deadweight is simultaneously sunk, then roller is advanced the stenosis area of chamber internal upper part apace, is tightly blocked by inclined-plane and anti-fall pull bar wall immediately, spoils thereby stoped pallet tenesmus and support body to collapse, guarantee whole frame body safety, avoided the generation of falling accident.

The utility model has the advantages that device volume is little, in light weight, simple in structure, fitting operation is easy to maintenance, braking time short safe and reliable, can be immediately with the tray locking that drops fast, stoped the pallet tenesmus, guarantee support body safety, avoided the generation of falling accident.

The utility model has following accompanying drawing Fig. 1 to look mark among the sectional side elevation figure for this device three-dimensional view Fig. 2 for this apparatus structure master: 1 is housing, 2 is housing end face disk, 3 is the housing bottom surface, 4 bar shaped notches for the roller slip, 5 is shift fork, and 6 is the shift fork rotating shaft, and 7 is the shift fork handle, 8 is spring, 9 is roller, and 10 is roller end axle, and 11 is the fall arrest pull bar socket on the disk, 12 is the fall arrest pull bar socket on the housing bottom surface, 13 is the fall arrest pull bar, and 14 is the shift fork prong, and 15 is the nut bore of tray, 16 fasten the steel cable hole for the shift fork handle, and 17 is the housing end face.

The utility model is further specified as follows below in conjunction with accompanying drawing embodiment: electric lifting scaffold friction self-locking formula falling-proof safety device, housing 1 by rectangular trapezoidal terrace with edge shape, be used for the disk 2 on the housing end face of tray, dress is inserted and to be run through housing end face disk 2 and 3 cross sections, housing bottom surface are the fall arrest pull bar 13 of 25mm rectangle, and tail end is equipped with shift fork handle 7, shift fork rotating shaft 6 is equipped with at the rear portion, front end has bifurcation 14, and be fixed on shift fork 5 on the housing 1 a pair of right-angled trapezium sidewall by the rotary shaft rack in the shift fork rotating shaft 6, be contained in the spring 8 of 3 of shift fork handle 7 lower ends and housing bottom surfaces, being contained in roller 9 each assembly that its two ends fixed axis 10 is installed in shift fork 5 bifurcations 14 in the housing inner chamber constitutes; It is big that housing disk 2 middle parts and 3 middle parts, bottom surface have a bottom surface, the oblong openings 12 that last disc face is little, 11, be shaped in the housing with last, following oblong openings 11,12, connect, its three inside walls are vertical with the bottom surface, another side inside wall and bottom surface oblique be trapezoidal terrace with edge cavity at right angles, should become 11.3 ° angle between the interior tiltedly upright side walls face that side wall surface is relative with it, with the chamber on a pair of right-angled trapezium sidewall of skew wall face about adjacent, have the bar shaped roller slip notch 4 that a pair of perforation wall thickness parallels with interior skew wall face, roller 9 is loaded in the right-angled trapezium terrace with edge cavity, its face of cylinder one side interior skew wall face that reclines, opposite side fall arrest pull bar 13 surfaces that recline.This device has following structural parameters: housing 1: high 160mm;

Wide 70mm; Housing bottom surface 3: long 148mm; Housing end face 17: long 120mm; Disk 2 external diameter Φ 160mm; Last socket 11: socket 12 under length * wide=50 * 30 bottom surfaces: length * wide=75 * 30 rollers 9: body length 24mm; Roller 9: diameter of phi 11mm; Bar shaped roller slip notch 4: long 85mm; Bar shaped roller slip notch 4: wide 14mm; Shift fork 5: long 120mm; Shift fork 5: wide 30mm; Shift fork prong 14: long 60mm; Shift fork prong 14: wide 14mm; Shift fork rotating shaft 6: long 80mm; Shift fork rotating shaft 6: diameter of phi 10mm; Shift fork rotating shaft 6 height 80mm of 3 at the bottom of the housing; Spring 8: Φ 12mm; Manufacturing materials: roller 45# steel, remaining component Q235 steel.Device gross weight 7kg, when quiet pulling force reached 132KN, the ultimate strength that fall arrest pull bar 13 produces slippage was not less than the Q235Mpa standard.

Claims (3)

1, a kind of electric lifting scaffold friction self-locking formula falling-proof safety device, by device case (1), the disk (2) on this housing end face of being contained in that is used for tray, dress is inserted the fall arrest pull bar assemblies such as (13) that runs through housing disk (2) end face and bottom surface (3) and is constituted, and it is characterized in that: this device also includes the shift fork (5) that the front end that is contained on the housing (1) has prong (14), be contained in the shift fork rotating shaft (6) at shift fork rear portion, be contained in the rotary shaft rack between this rotating shaft and housing (1), be contained in the shift fork handle (7) of shift fork tail end, be contained in the spring (8) between shift fork handle bottom and housing bottom surface (3), and be contained in the endoceliac roller of shell (9); End face disk (2) middle part of housing and bottom surface (3) middle part, it is big to be shaped on bottom surface respectively, the square aperture that last disc face is little, enclosure interior is shaped on and is somebody's turn to do, following square aperture connects, its three inside walls are vertical with the bottom surface, another side sidewall and bottom surface oblique be trapezoidal terrace with edge cavity at right angles, with the chamber on the adjacent pair of right and left upright side walls of skew wall face, have the roller slip bar shaped notch (4) that a pair of perforation wall thickness parallels with interior skew wall face, the cylindrical roller (9) that two ends have fixed axis (10) is contained in the housing chamber, the face of cylinder one side of roller is by pasting skew wall face in the chamber, relative side fall arrest pull bar (13) wall that reclines, the fixed axis at roller two ends (10) respectively stretches out bar shaped notch (4), and be stuck in two prongs (14) of the outer shift fork (5) of housing, shift fork is fixed on the housing pair of outside wall adjacent with interior skew wall face by the rotary shaft rack on it.

2, according to the described electric lifting scaffold friction self-locking of claim 1 formula falling-proof safety device, it is characterized in that: between the vertical wall relative of the skew wall face in the device case chamber, constitute 11 ° of-18 ° of angles with it.

3, according to the described electric lifting scaffold friction self-locking of claim 1 formula falling-proof safety device, it is characterized in that: the pull bar (13) that dress is inserted in the pass-through facility housing is the fall arrest pull bar with square-section.

Images