CN214007043U

CN214007043U - Pit telescopic ladder with counterweight

Info

Publication number: CN214007043U
Application number: CN202022289964.6U
Authority: CN
Inventors: 陈烁华; 卢炜
Original assignee: Hitachi Elevator China Co Ltd
Current assignee: Hitachi Elevator China Co Ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-08-20
Anticipated expiration: 2030-10-14

Abstract

The utility model discloses a take flexible cat ladder in pit of counter weight, including installing support, loose pulley assembly, cat ladder device and balancing weight, the well lateral wall of pit is located to installing support and loose pulley assembly, loose pulley assembly locates the top of installing support, be equipped with the spout on the installing support, the upper end and the spout of cat ladder device slide and normal running fit, the last rope that is equipped with of loose pulley assembly, the one end of rope is connected with the upper end of cat ladder device, and the other end is connected with the balancing weight. The ladder climbing device has two states, namely a tightening state and an opening state, and when the ladder climbing device is not used, the ladder climbing device is tightened, namely, the ladder climbing device is attached to the side wall of a well of a pit, so that the occupied space is reduced; through the loose pulley assembly and the balancing weight that set up, let the gravitational potential energy of cat ladder device and the gravitational potential energy interconversion of balancing weight, and then when reducing the operation cat ladder device, the required energy of consuming of operator, so required power is littleer when operator operates cat ladder device, and it is more simple and convenient to operate.

Description

Pit telescopic ladder with counterweight

Technical Field

The utility model belongs to elevator erection equipment field, concretely relates to flexible cat ladder in pit of taking counter weight.

Background

In the new elevator manufacturing and installation safety code GB 7588.1, more requirements are placed on ladder ladders installed in the pit, for example the length of the stiles or other suitable handrails extending vertically upwards from the landing sill at a height of at least 1.10 m. The existing technical scheme for dealing with the new GB 7588.1 mainly comprises two types:

the first type is a fixed ladder stand arranged on the side wall, the ladder stand is an upright ladder stand, and cannot be moved and the position of the ladder stand cannot be changed, and under the condition of normal installation, the top end of the ladder stand is 1.10m higher than a sill;

the second kind is installed in the activity cat ladder of lateral wall, and the cat ladder is connected with installing support, and this kind of cat ladder is in the state of tightening up when not using, reduces well occupation space, pulls open certain angle with the cat ladder during the use, and the cat ladder of operator's accessible open mode gets into the pit.

Of the two schemes, the first scheme has the following problems: the occupied space is large, and the new national standard requires that the distance between the back of the rung and the wall is not less than 200mm for the vertical ladder, so that the ladder occupies larger space of the shaft and is easy to interfere with the car, the car frame and other parts in the shaft.

The second solution has the problems that: the operation is not simple and convenient, because this kind of cat ladder needs the people to go to carry and draw and open the operation, and the cat ladder is installed in the lateral wall, and the operator need stand outside the well, and the gravity center moves forward, stretches the hand to carry and draw and open movable cat ladder, and the pit depth is big more, and the weight of cat ladder also can be big more, and the difficulty of carrying and drawing and opening the cat ladder rises, and the operator has the well risk of falling. In order to reduce the weight of the ladder stand, designers usually select aluminum as the material for making the ladder stand, and the price of the aluminum is much higher than that of common steel, which leads to the price of the movable ladder stand being greatly increased. The cat ladder passes through connecting bolt with the installing support and links to each other, opens the cat ladder in-process, and the bolt takes place the activity friction with the installing support activity, and the cat ladder carries the in-process, because cat ladder weight is great, the operator is difficult to guarantee to carry and carries the direction for vertical upwards, and this will make the operator need pay out great power and go to carry and draw the cat ladder. And the operator tightens up the cat ladder in-process, and the operator is carrying the cat ladder, pushes away it toward well lateral wall direction, if the operator is hard too hard this moment, leads to cat ladder and well lateral wall to press from both sides the risk of hindering the operator's finger easily.

Disclosure of Invention

In order to overcome the above shortcoming of the prior art, an object of the utility model is to provide a take flexible cat ladder in pit of counter weight aims at solving the current not simple and convenient problem of change operation of cat ladder occupation space big, cat ladder that exists.

The utility model discloses a reach its purpose, the technical scheme who adopts as follows:

the utility model provides a take flexible cat ladder in pit of counter weight, includes installing support, loose pulley assembly, cat ladder device and balancing weight, the well lateral wall of pit is located to installing support and loose pulley assembly, loose pulley assembly locates the top of installing support, be equipped with the spout on the installing support, the upper end and the spout slip and the normal running fit of cat ladder device, the last rope that is equipped with of loose pulley assembly, the one end and the upper end of cat ladder device of rope are connected, the other end and the balancing weight of rope are connected.

Preferably, the mounting bracket and the pulley assembly are mounted on the same side of the hoistway wall above the pit.

Preferably, a connecting bolt piece is arranged in the sliding groove and connected with the upper end of the ladder climbing device, the diameter of a screw of the connecting bolt piece is smaller than the width of the sliding groove, a nut is arranged at the other end of the connecting bolt piece, and the diameter of the nut and the head of the connecting bolt piece is larger than the width of the sliding groove.

Preferably, the mounting bracket comprises a mounting plate, two side plates are respectively arranged on two sides of the mounting plate, the sliding groove is formed in each side plate, and the upper end of the ladder climbing device is located between the two side plates.

Preferably, the mounting plate is fixed to the hoistway wall of the pit by means of expansion bolts.

Preferably, a guide plate is further arranged on the side wall of the well of the pit, a guide groove is formed in the guide plate, and the balancing weight is in sliding fit with the guide groove.

Preferably, the weight of the counterweight block is less than the weight of the ladder climbing device.

Preferably, the ladder climbing device is made of steel or aluminum.

Preferably, the end face of the hoistway side wall of the pit towards the ladder climbing device is provided with a hand clamping prevention device which is a strut member.

Preferably, the ladder climbing device comprises two handrail rods arranged in parallel, and a plurality of rungs arranged in parallel are arranged between the two handrail rods.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a pit telescopic ladder stand with a counterweight, which has two states, namely a tightening state and an opening state, and when the ladder stand device is not used, the ladder stand device is tightened, namely, the side wall of a well of the pit is attached, so that the occupied space is reduced; through the loose pulley assembly and the balancing weight that set up, let the gravitational potential energy of cat ladder device and the gravitational potential energy interconversion of balancing weight, and then when reducing the operation cat ladder device, the required energy of consuming of operator, so required power is littleer when operator operates cat ladder device, and it is more simple and convenient to operate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a front view of the present invention;

fig. 2 is a side view of the present invention.

Fig. 3 is a schematic view of the utility model in a tightened state.

Fig. 4 is a schematic view of the present invention in an open state.

Description of reference numerals:

1-pulley assembly, 2-ladder climbing device, 21-grab bar, 22-step stick, 3-mounting bracket, 31-mounting plate, 32-side plate, 4-chute, 5-guide plate, 6-counterweight block, 7-expansion bolt piece, 8-connecting bolt piece, 9-nut, 10-rope and 11-brace piece.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and detailed description. In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, and the described embodiments are merely some embodiments, rather than all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 4, an embodiment of the present invention provides a pit telescopic ladder with a counterweight, including a pulley assembly 1, a ladder device 2, a mounting bracket 3, a guide plate 5 and a counterweight 6, where the pulley assembly 1, the mounting bracket 3 and the guide plate 5 are arranged on the same side of a side wall of a well higher than the pit from top to bottom, the ladder device 2 is made of steel or aluminum, the ladder device 2 includes two handrail rods 21 arranged in parallel, a plurality of parallel stepping bars 22 are arranged between the two handrail rods 21, the mounting bracket 3 includes a mounting plate 31, two side plates 32 are respectively arranged on two sides of the mounting plate 31, a chute 4 is arranged on each side plate 32, the mounting plate 31 is fixed to the side wall of the pit through an expansion bolt 7, the upper end of the ladder device 2 is arranged between the two side plates, a connecting bolt 8 is arranged in the chute 4, the upper end of connecting bolt spare 8 and the bar of cat ladder device 2 is connected, the screw rod diameter size of connecting bolt spare 8 is less than 4 groove width sizes of spout, is equipped with nut 9 at the other end of connecting bolt spare 8, and nut 9 is greater than 4 groove width sizes of spout with the head diameter size of connecting bolt spare 8, be equipped with rope 10 on loose pulley assembly 1, the one end of rope 10 is connected with the upper end of the bar of cat ladder device 2, the other end and the balancing weight 6 of rope 10 are connected, are equipped with the guide way on deflector 5, balancing weight 6 and guide way sliding fit are equipped with the anti-pinch hand device at the terminal surface of bar 21 towards the well lateral wall of pit, the anti-pinch hand device is a member 11, the weight of balancing weight 6 is less than the weight of cat ladder device 2.

In summary, compared with the prior art, the method has the following advantages:

1. the utility model discloses a take flexible cat ladder in pit of counter weight, this cat ladder device have two kinds of states, are tightening up the state and open the state respectively, when the cat ladder device does not use, tighten up the cat ladder device, the well lateral wall of laminating the pit promptly reduces occupation space.

2. The utility model discloses on prior art's the basis of movable cat ladder, balancing weight and loose pulley assembly have been increased, walk around loose pulley assembly through the rope and be located cat ladder device and balancing weight, the partial gravity of cat ladder device is offset all the time to the gravity of the both ends balancing weight of fixed pulley this moment, if the weight of balancing weight is half of cat ladder weight, then deduct half cat ladder device weight that the balancing weight was offset, the power of actual person for carrying and opening cat ladder device will directly carry the required power of cat ladder device half less than when old design, the convenience of operation and the security of use have been improved greatly.

3. To the cost problem, after adopting balancing weight and loose pulley assembly, required operating force can reduce by a wide margin when the use of cat ladder device, and the material of cat ladder device can continue to use the steel material, compares and changes into the cost that aluminium system cat ladder device increased into, and the cost that increases of the flexible cat ladder scheme of taking the counter weight is still less.

4. The utility model discloses a balancing weight and loose pulley assembly, the guidance quality is better, and the operability is more simple and convenient, makes the cat ladder device keep vertical removal at the great degree of up-and-down motion in-process, and the activity is more smooth and easy.

5. The utility model discloses still be equipped with and prevent tong device, tighten up the in-process at the cat ladder device, square pipe plays the effect that restriction cat ladder device further removed to the well lateral wall, and the distance of strict control cat ladder device to the lateral wall makes the operator have sufficient safe distance with the well lateral wall in tightening up the cat ladder device finger, avoids pressing from both sides the wounded hand and foot risk.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a take flexible cat ladder in pit of counter weight which characterized in that, includes installing support, loose pulley assembly, cat ladder device and balancing weight, the well lateral wall of pit is located to installing support and loose pulley assembly, loose pulley assembly locates the top of installing support, be equipped with the spout on the installing support, the upper end and the spout slip and the normal running fit of cat ladder device, the last rope that is equipped with of loose pulley assembly, the one end of rope is connected with the upper end of cat ladder device, the other end and the balancing weight of rope are connected.

2. The weighted pit ladder of claim 1 wherein the mounting bracket and sheave assembly are mounted on the same side of the hoistway wall above the pit.

3. The pit ladder of claim 1, wherein the chute is provided with a connecting bolt member connected to the upper end of the ladder device, the connecting bolt member having a screw diameter smaller than the chute width, and a nut provided at the other end of the connecting bolt member, the nut and the connecting bolt member having a head diameter larger than the chute width.

4. The telescopic ladder with counterweight in pit as claimed in claim 1, wherein the mounting bracket comprises a mounting plate, one side plate is provided on each side of the mounting plate, the slide groove is provided on the side plate, and the upper end of the ladder climbing device is located between the two side plates.

5. A weighted pit ladder as claimed in claim 4 in which the mounting plate is secured to the pit hoistway wall by expansion bolts.

6. The telescopic ladder with counterweight for pit as claimed in claim 1, wherein a guide plate is further provided on the side wall of the well of the pit, a guide groove is provided on the guide plate, and the counterweight is slidably fitted in the guide groove.

7. A weighted pit ladder as claimed in any one of claims 1 to 6 wherein the weight of the counterweight is less than the weight of the ladder means.

8. A weighted pit ladder as claimed in any one of claims 1 to 6 wherein the ladder means is made of steel or aluminium.

9. The retractable underground pit ladder with counterweight as claimed in any one of claims 1 to 6, wherein a hand-pinching prevention means is provided on the end surface of the ladder means facing the side wall of the well of the underground pit, and the hand-pinching prevention means is a strut member.

10. A pit ladder as claimed in any one of claims 1 to 6 with counterweights, characterized in that the ladder means comprises two handrails arranged in parallel, between which a number of rungs are arranged in parallel.