JPS5825633B2 - man conveyor steps - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the steps of a passenger conveyor such as an escalator.

Recently, the field of use of passenger conveyors has expanded from general shopping stores to urban transportation facilities, and the actual usage conditions have become harsher than expected.

In particular, on passenger conveyors for urban transportation used by commuters and the like, it is common to see passengers climbing up the steps or jumping over several steps before getting off.

For this reason, the current situation is such that the strength of the steps, which were designed with the assumption of customers with high manners, cannot withstand the situation.

On the other hand, for passenger conveyors for urban transportation, there is a demand for high-strength steps that can handle the rush of commuters and long hours of driving.

The conventional structure is generally as shown in FIGS. 1 to 4.

The main components of this step 1 are a cleat 2 for passengers to ride on, a riser 3 to close the step, and brackets 4 on both sides that serve as a frame. 7 are arranged so that they run endlessly on a guide rail 8.

This step 1 must be lightweight in order to reduce the driving force, and must have sufficient strength from the viewpoint of passenger protection.

However, in the conventional step 1, especially the structure of the bracket 4, which is the main strength member, there remain concerns regarding the strength.

As shown, the conventional bracket 4 has a substantially triangular shape, and has a front shaft 9 connecting the front roller 5 at the front and a rear shaft 10 at the rear.

In addition, in some conventional examples, the central portion X has a window or a rib extending Xl.

The live load (passengers, etc.) wl is shared as shown by the arrows in FIGS. 3, 5, and 6.

That is, since the bracket 4 is arranged narrower than the width of the cleat 2 and is located behind the lower end of the riser 3, various bending and torsional moments occur.

To explain this moment in detail, a supporting reaction force is generated at the roller portions at point A and point 0 on the side surface, and a large reaction force w2 is generated particularly at the rear roller 6 portion as shown in FIG.

In this case, the rear end of the bracket 4 has a w
A bending moment of 2 x m is generated, and further component force w3
and w4 are also occurring.

On the other hand, on the front side of step 1, the load w is
The load W caused by 1.

is received by one bracket 4, and the reaction force w2,
Torsional moment Q multiplied by overhang
(w2×t) is generated, and this moment acts at a point D above the rear roller 6 (separated by n).

In addition, the bracket 4 also receives a compressive load, resulting in an extremely complicated load distribution, requiring a higher level of strength setting than that of general strength members such as bridges.

Here, the configuration of the bracket 4 is approximately triangular with ribs 4a standing up around the periphery, and as mentioned above, the rear roller 6 portion, which is important for strength, has a structure that closes the space formed by the ribs 4a. A lid-shaped reinforcing body 4b is fixedly joined by welding.

The positional relationship between the two is a downward load W that is part of the load w1 as shown in FIG.

This bracket 4 receives, and furthermore, this W.

The reinforcing body 4b itself transfers a part of the reaction force w2 resisting to the upward W
, it will be received as .

Therefore, a clockwise force acts on the bracket 4 itself, and a counterclockwise force acts on the reinforcing body 4b.

In this way, opposing forces act on the integrated bracket 4 and reinforcing body 4b, and the shearing force is as shown in FIGS. 2 and 4.
It is concentrated at the joint S in the figure.

Therefore, although the stress concentration part of the bracket 4 is strengthened by the reinforcing body 4b, the joint part S shown in FIG.
High stress occurs in the vicinity, and it is necessary to increase the strength to compensate for this.

To deal with this, measures have been taken such as increasing the thickness of the bracket 4 itself and further increasing the rigidity of the reinforcing body 4b.

However, in order to reduce the weight in Step 1, there are cases in which the central portion X of the bracket 4 is made without a window, and the method of increasing the plate thickness as described above is not really welcomed.

In view of this point, the present invention was made in order to increase the strength without increasing the weight.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 7 and 8, the configurations of the cleat 2, riser 3, etc. are the same as the conventional one, so illustrations can be omitted. A feature is that the bracket 12 has a structure that supports the upper end of the reinforcing body 12b, which corresponds to the conventional reinforcing body 4b.

Here, the bracket 12 has ribs 12 that stand up as in the conventional case.
c, and further includes a rear shaft 10.

The reinforcing piece 12a is cut out from the bracket 12 itself, raised up in the direction of arrow Y, and joined (welded, etc.) at the contact surface with the reinforcing body 12b.

This reinforcing piece 12a supports the upper end side 12d of the reinforcing body 12b which shares the support reaction force w2 of the rear roller 6 portion, and is ultimately designed to resist the component force w6 of the support reaction force w2.

Therefore, there is no need to increase the thickness of the member in order to cope with the concentration of stress near the welded portion S (FIGS. 2 and 4) as in the conventional case, and it is possible to make it lightweight.

Note that the shape of the reinforcing body 12b is similar to that of the bracket 1 as shown in FIG.
2, and the bracket 12 itself is not limited to the one shown in the example. As shown in FIG. The reinforcing body 15 may be supported using Za.

In short, the present invention provides a reinforcing body for reinforcing the rear part of the bracket, and the bracket itself is provided with a reinforcing piece for supporting this reinforcing body.

According to the present invention described above, it is possible to provide a step for a passenger conveyor with high strength.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional man conveyor step, Figure 2
The figure is a side view of the step in Figure 1, and Figure 3 is a side view of the step in Figure 2.
4 is a sectional view taken along line I, FIG. 4 is a sectional view taken along line ■-■ in FIG. Figure 6 shows ■-■ in Figure 5.
7 is an enlarged view of essential parts showing an embodiment of the present invention; FIG. 8 is a sectional view taken along line IV-IV in FIG. 7;
FIGS. 9 and 10 are enlarged views of main parts for explaining other embodiments of the present invention. 1... Step, 2... Cleat, 3
...Riser, 12...Bracket, Z
a, 12a... Reinforcement piece, 12b, 15, 13.
...Reinforcement body.

Claims (1)

[Claims] 1 Consists of a cleat on which a passenger rides, a riser that closes a step, and a bracket provided on both sides of the cleat to support the cleat and riser, and a substantially triangular rear end of the bracket has a rear end. A passenger conveyor is formed in almost the same shape as the rear wheel shaft, and is provided with a reinforcing body that fits into the rear wheel shaft attached to the rear end of the rear wheel shaft and receives the reaction force generated on the rear wheel shaft. In the step of
A reinforcing piece is integrally provided on the substantially triangular rear end of the bracket to receive the reaction force when it comes into contact with the upper surface of the reinforcing member and is transmitted to the reinforcing member via the shaft. A man conveyor step featuring