CN104150304B - Lifting height limiter - Google Patents

Abstract

The invention relates to a lifting height limiter. It includes a stand rod (2), a tension spring (4) and a connecting rod body (7). The right end of the connecting rod body (7) is provided with a pulley (8), and the middle part of the connecting rod body (7) is connected to the standing rod (2). The middle part of the connecting rod body (7) is hinged, and the left end of the connecting rod body (7) is provided with an upper bumper block (3) and a lower bumper block (9). connection, the lower part of the station pole (2) is provided with a lower limiter (5), the lower limiter (5) cooperates with the lower bumper block (9), and the upper part of the station pole (2) is provided with an upper limiter (6) , the upper limiter (6) cooperates with the upper bump block (3). The lifting height limiter of the present invention provides double protection functions through the cooperation of the connecting rod body and the upper and lower limiters, and effectively avoids the occurrence of roof fall accidents of the hanging cage.

Description

lift height limiter

technical field

The invention relates to a lifting height limiter, which is used for a construction hoist. It belongs to the technical field of safety protection devices.

Background technique

Construction elevators are also called construction elevators for buildings, and they can also be used as outdoor elevators and hoisting cages on construction sites. It is a manned and cargo-carrying construction machine often used in construction, mainly used for interior and exterior decoration of high-rise buildings, construction of bridges, chimneys and other buildings.

The existing limiter is to set the side of the hanging cage (the limiter has a telescopic handle, which is braked when pressed, and normal operation when protruding), and a block that cooperates with the limiter is set on the main limb of the standard section (See Figure 10), when the construction hoist goes up, the cage moves upward along the guide rail frame, when it moves to the apex of the standard section, the stopper presses the protruding telescopic handle of the limiter, thereby forming a brake, and the cage stops Move up.

The above braking method has the following problems: After the construction elevator is used for a long time, the cooperation gap between the stopper and the limiter becomes larger, the fit is easy to be displaced, and the lifting handle of the limiter is easily damaged, which leads to the failure of the limiter , when the cage rises to the apex, the cage will continue to rise, and finally break away from the guide rail frame, causing an accident; at the same time, when the workers assemble and disassemble the top of the cage, the stopper has not been installed. At this time, the cage is most likely to fall and the cage will fall Catastrophic accident.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a lifting height limiter. This device has two limiters to provide double protection, and the failure of its extension spring will not affect its use effect.

The purpose of the present invention is achieved like this:

A lifting height limiter, installed on the top of the cage, is characterized in that: the lifting height limiter includes a stand rod and a connecting rod body, the lower end of the stand rod is fixed on the top of the cage, and the connecting rod The right end of the rod body is provided with a pulley, the middle part of the connecting rod body is hinged with the middle part of the standing rod, the left end of the connecting rod body is provided with an upper bumper block and a lower bumper block, and the lower part of the rod body is provided with a lower limiter, and the lower part The lower telescopic handle of limiter cooperates with the lower bump block, and the top of the described station pole is provided with the upper limiter, and the upper telescopic handle of the upper limiter cooperates with the upper bump block.

The lifting height limiter of the present invention further includes a tension spring, and the upper end of the station rod is connected to the left end of the connecting rod body through the tension spring.

A lifting height limiter of the present invention, the connecting rod body includes a front plate and a rear plate, the front plate and the rear plate are respectively located on the front and rear sides of the stand pole, the upper bumper is arranged at the left end of the front plate, the front plate and the Between the left part of the back plate is provided with a connecting plate fixedly connected with the two plates respectively, the lower bumper block is arranged on the connecting plate, one end of the extension spring is connected with the upper end of the stand bar, and the other end is connected with the left end of the back plate. By connecting.

The invention relates to a lifting height limiter, the lower part of the stand pole is provided with a bracket, and the lower limiter is arranged on the bracket.

The invention relates to a lifting height limiter. The hanging cage moves up and down along the guide rail frame of the standard joint, and the pulley is close to the main limb of the standard joint.

Compared with prior art, the beneficial effect of the present invention is:

The invention is a lifting height limiter, the connecting rod body rotates clockwise, in the first step, the lower bump block at the left end presses the lower telescopic handle of the lower limiter, and the lower limiter brakes and stops the upward contactor, the hanging cage Stop upward; when the lower limiter fails or the upward contactor fails, the connecting rod body continues to rotate clockwise, the upper bumper presses the upper telescopic handle of the upper limiter, the upper limiter brakes the main contactor, and the cage stops Continuing upward, this structure cleverly cooperates with the upper and lower limiters through the connecting rod body, providing double protection and effectively avoiding the occurrence of roof fall accidents; when the lifting height limiter is used for a long time, the tension spring will Aging, under the action of its own gravity, the pulley can still make the connecting rod body rotate clockwise to achieve braking, and the safety of construction personnel will be further guaranteed.

Description of drawings

Fig. 1 is a structural schematic diagram of a lifting height limiter of the present invention.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a left side view of Fig. 1 .

FIG. 4 is a rear view of FIG. 1 .

Fig. 5 is an embodiment diagram of the cage in normal operation.

Fig. 6 is an embodiment diagram of the lower restrictor of the present invention when it is working.

Fig. 7 is an embodiment diagram of the upper restrictor of the present invention when it is working.

Fig. 8 is a wiring diagram of the upper limiter of the present invention.

Fig. 9 is a wiring diagram of the lower restrictor of the present invention.

Fig. 10 is a schematic diagram of cooperation between a conventional limiter and a stopper.

In the picture:

connection seat 1,

standing pole 2,

bracket 2.1,

bump block 3,

extension spring 4,

lower limiter 5,

Lower telescopic handle 5.1,

upper limiter 6,

Upper telescopic handle 6.1,

Connecting rod body 7,

connection plate 7.1,

Front panel 7.2,

rear panel 7.3,

Pulley 8,

Down touch block 9,

hanging cage 10,

Standard Section 11,

main limb 11.1,

first coil terminal 12,

main contactor 13,

Uplink contactor 14,

The second coil terminal 15 .

detailed description

Referring to Figures 1-4, the present invention relates to a lifting height limiter installed on the top of the cage 10 or the top of the transmission, which includes a connecting seat 1, a station rod 2, a tension spring 4 and a connecting rod body 7, the station The lower end of the rod 2 is fixedly connected to the connecting seat 1, and the connecting seat 1 is fixedly arranged on the top of the cage 10. The connecting rod body 7 includes a front plate 7.2 and a rear plate 7.3, which are respectively located on the stand pole 2 The front and rear sides of the front plate 7.2 and the right end of the rear plate 7.3 are provided with a pulley 8, the middle part of the front plate 7.2 and the rear plate 7.3 is hinged with the middle part of the stand pole 2, and the left end of the front plate 7.2 is provided with an upper bump block 3, a connecting rod The left part of the body 7 is provided with a connecting plate 7.1 for fixing the front plate 7.2 and the rear plate 7.3, the connecting plate 7.1 is provided with a lower bumper block 9, and the upper end of the station pole 2 is connected with the left end of the rear plate 7.3 through a tension spring 4 , the lower part of the station pole 2 is provided with a bracket 2.1, the lower limiter 5 is arranged on the support 2.1, the lower telescopic handle 5.1 of the lower limiter 5 cooperates with the lower bumper 9, and the upper part of the station pole 2 is provided with The upper limiter 6, the upper telescopic handle 6.1 of the upper limiter 6 cooperates with the upper bump block 3.

Installation method: see Figure 5-7, a lifting height limiter of the present invention is welded and fixed on the top of the cage 10 or the transmission top of the construction elevator through the connecting seat 1 at the bottom, and the center of the station pole 2 is aligned with the standard joint 11 The installation distance of the main limb 11.1 is 150～180mm, and the pulley 8 of the present invention is close to the main limb 11.1 of the standard joint 11, and moves up and down with the hanging cage 10.

working principle:

① Referring to Fig. 5, when the hanging cage 10 is working normally, the pulley 8 is close to the main limb 11.1 of the standard section 11 and moves up and down with the hanging cage 10.

Referring to Fig. 6, when the cage 10 rises to the top of the standard joint 11, the pulley 8 is derailed, and under the double action of the self-gravity of the pulley 8 and the tension of the extension spring 4, the connecting rod body 7 rotates clockwise, and the lower bump of the left end The block 9 presses the lower telescopic handle 5.1 of the lower limiter 5, the lower limiter 5 brakes, and the cage 10 stops going up (but can go down). At this time, the safety distance between the center of the rollers of the cage 10 and the top of the standard section 11 is 300- 340mm.

② Referring to Fig. 7, when the lower limiter 5 of the present invention fails, the cage 10 continues to move upward, and under the double action of the self-gravity of the pulley 8 and the tension of the extension spring 4, the connecting rod body 7 continues to rotate clockwise, and the upper bump block 3 Press the upper telescopic handle 6.1 of the upper limiter 6, the upper limiter 6 brakes, and the hoisting cage 10 stops going up (the hoisting cage 10 cannot go down, and the hoisting cage 10 can only go down after the upper limiter 6 is reset). The safe distance between the center of the rollers of the cage 10 and the top of the standard section 11 is 120-140mm.

Figure 8 and Figure 9 are the wiring diagrams of the upper limiter and the lower limiter respectively.

Claims (3)

1. a kind of lifting height limiter, installed in cage（10）Top, it is characterised in that：The lifting height limiter bag Include snag（2）, extension spring（4）And gonnecting rod body（7）, the snag（2）Lower end be fixed on cage（10）Top, the snag （2）Upper end and gonnecting rod body（7）Left end pass through extension spring（4）Connection, the gonnecting rod body（7）Right-hand member be provided with pulley（8）, even The body of rod（7）Middle part and snag（2）Middle part be hinged, gonnecting rod body（7）Left end be provided with collision block（3）And lower bumping block（9）, institute State snag（2）Bottom be provided with lower restrictor（5）, the lower restrictor（5）Lower Telescopic handle（5.1）With lower bumping block （9）Coordinate, the snag（2）Top be provided with upper restrictor（6）, upper restrictor（6）Upper Telescopic handle（6.1）With it is upper Collision block（3）Coordinate, the gonnecting rod body（7）Including foreboard（7.2）And back plate（7.3）, foreboard（7.2）And back plate（7.3）Difference position In snag（2）Front and rear both sides, the upper collision block（3）It is arranged on foreboard（7.2）Left end, foreboard（7.2）And back plate（7.3）'s The connecting plate being fixedly connected with two plates respectively is provided between left part（7.1）, the lower bumping block（9）It is arranged on connecting plate（7.1） On, the extension spring（4）One end and snag（2）Upper end connection, the other end and back plate（7.3）Left end connection.

2. a kind of lifting height limiter according to claim 1, it is characterised in that：The snag（2）Bottom set There is support（2.1）, the lower restrictor（5）It is arranged on support（2.1）On.

3. a kind of lifting height limiter according to claim 1 and 2, it is characterised in that：The cage（10）Along applying The standard knot of work lift（11）Guide rail bracket move up and down, pulley（8）It is close to the standard knot of building hoist（11）Main limb （11.1）.