SU1204537A1 - Escalator - Google Patents

Description

curvilinear, the radius of curvature of which is chosen from the ratio

R (OI-1, O) T,

I

-i

I

This invention relates to a lifting machinery industry, in particular to escalators.

The purpose of the invention is to improve the usability of the escalator by preventing the increased loads on the main runners,

Fig. 1 schematically shows the horizontal section of the guide in the engagement zone of the pulling chain with an asterisk in Fig. 2 — node 1 in Fig. 1 (option 1); in Fig. 3, node 1 in Fig. 1 (P variant ) j in FIG. 4 - node P in FIG. 1, in FIG. 3 — section A-A in FIG. 4.

The escalator contains a pulling chain 1 of steps 2, an asterisk 3 with teeth 4, in conjunction with which the rollers 5 of the pulling chain 1 are installed, and a guide 6 designed to move the main runners 7 of steps 2.

The guide 6 has a horizontal section 8 located at a height below the horizontal tangent a b to the initial circle of radius h of the asterisk 3. The distance between the horizontal section 8 of the guide 6 and tangent a b is chosen from the ratio

k

-f (0.05-0 ,, -, (t, -t,) 5u

h

- |; (MO,

de D is the distance in height between the horizontal portion of the guide and the horizontally resistive spacing to the initial circumference of the sprocket} located at the horizontal plane} Oc is the diameter of the main slider 7;

Osch - the diameter of the hinge coupling chain 1 j

R is the radius of curvature of the bent end of the horizontal portion of the guide for the main runners of steps.

five

0

five

0

five

g

0

Z is the number of teeth 4 asterisks 3, t is the calculated step of the traction chain 1-;

maximum permissible spacing of the traction chain 1, taking into account the wear of the hinges and the chain drawing

The choice of the distance D in height between the horizontal section 8 of the guide 6 and the tangent q-b to the initial circle of the asterisk 3 is determined by the following considerations.

When moving the main runners of steps along the horizontal sections of the directions, tears of the runners from the direction of movement are created. The reasons for this are that the final number of sprocket teeth in the chain transmission causes friction in the chain hinges. a bend chain with steps with an amplitude of 0.05-0.15 of the diameter of the chain hinge, determined by the moment of friction in the chain hinge, but not exceeding the value equal to

ti. 90

- sin -. In addition, the increase

dlо

The chain pitch during operation leads to an increase in the radius of the circle on which the chain rollers on the sprocket lie by an amount equal to r; r (i2-i. The vertical oscillation of the step chain leads to the impact of the main runners on the guides, increasing the knock of the chain rollers on the tooth of the sprocket due to the addition of the mass of the oscillating section of the chain in steps to the mass of the rip involved in the mesh.

In order to eliminate breaks of the main runners from the guides in the zone of the entrance platform and thus reduce the level of the pygum, the horizontal part of the direction K) rises

in comparison with the known constructions of escalators by the value of 3k - ea, in order to prevent the occurrence of increased loads on the main runners, the end of the horizontal section of the guide is bent at a point located outside the interaction zone of the traction chain with an asterisk. In this case, the choice of value S more expressions 8/2 (, 15) s (r o r ode reducing the efficiency of raising the horizontal section of the guide, and choosing the value of D is less than the expression. 90 ° ZI sin - increase the loads on the main sliders. The choice of upper and lower limits of the angle of inclination about the bent end of the horizontal portion of the guideline, due to the fact that

- H

more expression is reduced

e (1) the efficiency of raising the horizontal section of the guide, and at oi

-A- (vt,).

jejibme expressions

dramatically increase the load on the main runners.

The choice of the lower limits of values is due to the fact that when the latter are reduced, there will be a sharp increase in the loads on the main sliders; in the case of an increase in the upper limits, the efficiency of placing the horizontal portion of the guideway at a distance D in height from the tangential a - b will decrease.

The end 9 of the horizontal section 8 of the guide 6 is bent at a point located outside the zone of the interacting thrust chain 1 with an asterisk 3. One of the design options is to perform the bent end

f 2

2045374

9 inclined to the horizontal section 8 at an angle to it, selected from the conditions

S 2

° s. i

g

 one

where ot is the angle of inclination of the bent end of the horizontal portion of the guide;

L is the shortest distance between vertical lines, one of which passes through the axis of rotation of the asterisk, and the other through

the point at which the end of the horizontal section is bent down, equal to 1.0-1.5 steps of the draw chain 1.

Another design variant is the implementation of the curved end 9 curved, the radius of curvature R

which is selected from. ratios

 L

 R 40 -1.0)

where R is the radius of curvature of the bent

the end of the horizontal portion of the guide for the main 3Q of the stage sliders.

The escalator works as follows.

The main runners of 7 steps 2, fixed on the traction chain 1,

2J are moved under the influence of the traction chain 1 along the horizontal section 8 of the guide 6. When approaching the FAST chain 1 to the sprocket 3, the rollers 5 of the chain 1 come into contact with the teeth 4

40 asterisks 3, and the main sliders 7 together with the steps 2 move along the bent end 9 of the horizontal section 8 of the guide 6 and after passing around the asterisk 3

5 go to the idle branch of the escalator (not shown).

,) (M (8 S

FIG.

but

2

but

Aa

Phi1.1

Editor M. Bandura

Compiled by Llapenko Tehred A. Babine

Order 8484/21 Circulation 803 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

5

Proofreader M. Pojo

Claims (3)

1. ESCALATOR containing a traction chain of steps, covering the sprocket and a guide for the main runners of the steps, having a horizontal section located in height below the tangent to the sprocket’s initial circumference in the horizontal plane, the end of which faces the sprocket and is bent down, characterized in that, with the purpose of increasing ease of use by preventing increased stresses on the main runners, the height distance between the horizontal section of the guide and located in Horizontal plane tangent to the initial sprocket circumference ratio is selected from ~ (P 05-0.y) a. ~ (D-GL 4 y ⁵ 'V where Δ "vertical spacing between the. horizontal guide portion and located in a horizontal plane tangent to the initial circumference of the asterisk J dj is the diameter of the main slider; d W - diameter of the hinge of the traction chain; ' 2 - the number of teeth of the sprocket; ti is the calculated step of the traction chain '^ 2 is the maximum allowable step of the traction chain, taking into account the wear of the joints and the hood, and the end of the horizontal section of the above guide is bent at a point located outside the zone of interaction of the traction chain with an asterisk. 2. The escalator according to claim 1, characterized in that the bent end of the horizontal section of the guide is made inclined with an angle selected from the condition where r is the angle of inclination of the bent end of the horizontal section of the guide; B is the shortest distance * between the vertical lines, one of which passes through the axis of rotation of the sprocket, and the other through the point at which the end of the horizontal section is bent down, equal to 1.0-1.5 steps of the traction chain. 3. The escalator according to claim 1, characterized in that the bent end of the horizontal section of the aforementioned guide is made < _1Я $ and.,, 1204537 curved, the radius of curvature of which is selected from the ratio. L ² ¢ - (0.4-1.0) X --- 'g ^L 537 where R is the radius of curvature of the bent end of the horizontal section of the guide for the main runners of the steps.