Mobile car sheave shield

Abstract

A mobile car sheave shield comprises a static shield part 2 sleeved on a car sheave 1, wherein an opening is formed on upper of the static shield part; a dynamic shield part is arranged on the opening; the dynamic shield part comprises a shield bracket 3; an inner side mobile shield 4 and an outer side mobile shield 5 which are synchronously connected are respectively arranged on two sides of a central axis of the shield bracket from inside to outside; the outer side mobile shield and the inner side mobile shield are slidingly connected on the shield bracket. The present invention has the advantages that: by combining the static shield part and the dynamic shield part, the dynamic shield part is moved by the traction rope, to realize mobile protection of the shield, thus offering a clearance constantly meeting safety requirement and guaranteeing safety of a car top worker.

Claims

1. A mobile car sheave shield comprising: a static shield part to be positioned about a car sheave, wherein an opening is formed on an upper surface of the static shield part; a dynamic shield part arranged on the opening; the dynamic shield part comprises a shield bracket; an inner side mobile shield and an outer side mobile shield which are connected to each other and arranged on two sides of a central axis of the shield bracket; wherein the outer side mobile shield and the inner side mobile shield are slidingly connected on the shield bracket; a notch formed between the inner side mobile shield and the outer side mobile shield, and a traction rope runs through the notch, the traction rope being positioned between the inner side mobile shield and the outer side mobile shield.

2. The mobile car sheave shield according to claim 1, wherein a connecting rod is arranged between the inner side mobile shield and the outer side mobile shield; claws are respectively arranged at two ends of the connecting rod; the claw at one end of the connecting rod is fastened on a slide bar of the inner side mobile shield, and the claw at the other end of the connecting rod is fastened on a slide bar of the outer side mobile shield.

3. A mobile car sheave shield comprising: a static shield part to be positioned about a car sheave, wherein an opening is formed on an upper surface of the static shield part; a dynamic shield part arranged on the opening; the dynamic shield part comprises a shield bracket; an inner side mobile shield and an outer side mobile shield which are connected to each other and arranged on two sides of a central axis of the shield bracket; wherein the outer side mobile shield and the inner side mobile shield are slidingly connected on the shield bracket; a notch formed between the inner side mobile shield and the outer side mobile shield, and a traction rope runs through the notch, the traction rope being positioned between the inner side mobile shield and the outer side mobile shield; guide grooves are respectively formed on the inner sides of edge frames in a length direction of the shield bracket; slide bars are respectively arranged at two ends of the outer side mobile shield and the inner side mobile shield (5), and front ends of the slide bars are embedded in the guide grooves.

4. A mobile car sheave shield comprising: a static shield part to be positioned about a car sheave, wherein an opening is formed on an upper surface of the static shield part; a dynamic shield part arranged on the opening; the dynamic shield part comprises a shield bracket; an inner side mobile shield and an outer side mobile shield which are connected to each other and arranged on two sides of a central axis of the shield bracket; wherein the outer side mobile shield and the inner side mobile shield are slidingly connected on the shield bracket; a notch formed between the inner side mobile shield and the outer side mobile shield, and a traction rope runs through the notch, the traction rope being positioned between the inner side mobile shield and the outer side mobile shield; wherein a support frame is arranged on the central axis of the shield bracket; two electric contact switches facing opposite directions are arranged on the support frame, and springs are respectively arranged on two sides of the support frame; front ends of the springs are connected to the inner side mobile shield.

5. A mobile car sheave shield comprising: a static shield part to be positioned about a car sheave, wherein an opening is formed on an upper surface of the static shield part; a dynamic shield part arranged on the opening; the dynamic shield part comprises a shield bracket; an inner side mobile shield and an outer side mobile shield which are connected to each other and arranged on two sides of a central axis of the shield bracket; wherein the outer side mobile shield and the inner side mobile shield are slidingly connected on the shield bracket; a notch formed between the inner side mobile shield and the outer side mobile shield, and a traction rope runs through the notch, the traction rope being positioned between the inner side mobile shield and the outer side mobile shield; wherein both the inner side mobile shield and the outer side mobile shield are provided with upper shield plates on an upper side and lower shield plates on a lower side; the two upper shield plates are parallel to each other and the two lower shield plates are parallel to each other, and fixed roller mechanisms are respectively arranged on opposite surfaces of the inner side mobile shield and the outer side mobile shield.

6. The mobile car sheave shield according to claim 5, wherein the fixed roller mechanism comprises a shaft base on the inner side mobile shield or outer side mobile shield; a rolling shaft is arranged on the shaft base; a hearing is fixed on the rolling shaft; a roller is fixed on the bearing, and a front end of the roller is exposed out of the front end of the upper shield plate.

7. The mobile car sheave shield according to claim 5, wherein the outer side mobile shield is a structure which is inclined.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic diagram of the structure according to the present invention;

(2) FIG. 2 is a top view of the structure according to the present invention;

(3) FIG. 3 is a schematic diagram of a circuit structure in the connecting rod according to the present invention;

(4) FIG. 4 is a side-looking structure schematic diagram of the outer side mobile shield and the inner side mobile shield according to the present invention.

(5) 1-car sheave; 2-static shield part; 3-shield bracket; 4-outer side mobile shield; 5-inner side mobile shield; 6-support frame; 7-electric contact switch; 8-spring; 9-connecting rod; 10-slide bar; 11-claw; 12-guide groove; 13-upper shield plate; 14-lower shield plate; 15-rolling shaft; 16-bearing; 17-roller; 18-traction rope

DETAILED DESCRIPTION

(6) The present invention shall be further described in detail hereinafter in conjunction with the accompanying drawings and the embodiments.

Embodiments

(7) According to the embodiment of the present invention, there is provided a mobile car sheave shield, which, as shown in FIG. 1 and FIG. 2, comprises a static shield part 2 which covers outside of car sheave 1; an opening is arranged on the upper surface of the static shield part, and a dynamic shield part is arranged in the opening.

(8) The dynamic shield part comprises a shield bracket 3 which is a square block structure; a support frame 6 is arranged on the central axis of the shield bracket to divide the shield bracket into a left side and a right side, and an inner side mobile shield 5 and an outer side mobile shield 4 are respectively arranged on each side from inside to outside. Both the inner side mobile shield and the outer side mobile shield are slidingly connected on the shield bracket; guide grooves 12 are respectively arranged on the inner sides of edge frames in a length direction of the shield bracket, and slide bars 10 are arranged at two ends of the inner side mobile shield and the outer side mobile shield; the front ends of the slide bars are embedded in the guide grooves.

(9) A connecting rod 9 is connected between the inner side mobile shield and the outer side mobile shield, thus synchronously connecting the inner side mobile shield and the outer side mobile shield. As shown in FIG. 2 and FIG. 3, claws 11 are respectively arranged at two ends of the connecting rod; the claw at one end of the connecting rod is fastened on the slide bar of the inner side mobile shield and the claw at the other end of the connecting rod is fastened on the slide bar of the outer side mobile shield. A clearance is formed between the inner side mobile shield and the outer side mobile shield, and the traction rope 18 runs through the clearance.

(10) Two electric contact switches 7 facing opposite directions are arranged on the support frame, and springs 8 are respectively arranged on two sides of the support frame; the front ends of the springs are connected to the inner side mobile shield on this side.

(11) As shown in FIG. 4, both the inner side mobile shield 5 and the outer side mobile shield 4 are provided with upper shield plates 13 on the upper side and lower shield plates 14 on the lower sides; the two upper shield plates are relatively parallel and the two lower shield plates are oppositely parallel; the outer side mobile shield is a structure which is inclined inwards. Fixed roller mechanisms are respectively arranged in the middles of opposite surfaces of the inner side mobile shield and the outer side mobile shield. Each fixed roller mechanism comprises a shaft base on either inner side mobile shield or outer side mobile shield; a rolling shaft 15 is arranged on the shaft base; a bearing 16 is fixed on the rolling shaft; a roller 17 is fixed on the bearing, and the front end of the roller is exposed out of the front end of the upper shield plate.

(12) When the elevator runs normally, no worker stands on the car top; the outer side mobile shield and the inner side mobile shield fail to connect together, the outer side mobile shield is on the outermost side while the inner side mobile shield is close to the support frame, at which time the electric contact switches are tightly pressed by the inner side mobile shield under tensions of the springs, so that the elevator is only under a normal running state, rather than a maintenance running state.

(13) When the worker enters the car top to start the elevator for maintenance running, the inner side mobile shield is pulled towards the outer side mobile shield and is fixed with the outer side mobile shield through the connecting rod. The electric contact switches are released, thus realizing maintenance running function of the elevator. The process of drawing and pushing the dynamic shield part just occurs in occasional maintenance running of the elevator, so as to avoid shortening of service life after working for long time.

(14) The embodiments described herein are exemplary and are just for interpretation of the invention. The technicians of the technical field can implement various modification, supplement or deformation in similar ways on the specific embodiments described, not departing from the spirit of the present invention or exceeding scope defined by claims attached.

(15) The specification, although using many terms such as car sheave, static shield part, shield bracket and outer side mobile shield, not rules out possibility of other terms. Those terms are just for conveniently describing and interpreting the nature of the present invention; interpretation of them into any additional limitation is violation of the spirit of the present invention.