JPS5920595B2 - man conveyor frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a frame for a passenger conveyor, and particularly to the structure of a frame whose main member is a member having an H-shaped cross section.

[Background of the invention]

Figure 1 shows the general outline of a passenger conveyor, the main body of which is supported by the beams of a building.

The frame that houses the various devices that make up the passenger conveyor is manufactured by dividing it into several parts and then fastening them with bolts or the like to form an integral frame.There are various types of frame structures, such as a truss or a garter.

In Figure 1, upper frame 1, middle frame 2, lower frame 3
An example of dividing into three is shown.

FIGS. 2 and 3 are cross-sectional views when H-beam steel having wide flanges is used as the main frame member. FIG. 2 shows a cross-section of the upper frame 1, and FIG. 3 shows a cross-section of the middle frame 2.

Since large equipment such as a main drive device is housed in the upper frame 1, the inside of the upper flange is cut out to increase the internal dimension.

The upper frame 1 is bent at about 30 degrees in the middle and is connected to the middle frame at the inclined straight part, but in order to bend the H section steel at 30 degrees, as shown in Figure 4a, It is common to cut out the vertical web at 30 degrees from the lower flange, bend it as shown in b, and weld the mating portion.

However, if H-beams with dimensions suitable for the purpose are not available, a frame with such a structure cannot be easily obtained.

In particular, when the drive device housed in the upper frame becomes larger, the depth of the frame becomes larger in that part, and the part where the bent end connects to the middle frame must be made shallower to match the depth of the middle frame. First, it was difficult to manufacture the upper frame from one type of H-beam steel.

In addition, as shown in Figure 2, if you want to increase the internal dimensions of the frame by not only cutting out the inside of the upper flange but also moving the vertical web outward to accommodate a large drive device, use the H-shaped Manufacturing from H-beam steel was difficult because the steel had to be bent laterally as well.

A conceivable solution to this problem would be to form the upper and lower flanges and the longitudinal web into independent plates, and assemble them by welding to produce an H-shaped member.

That is, as shown in Fig. 5, the upper flanges 4, 5, the lower flanges 6.7, and the webs 8, 9 are each made of a single steel plate, which is bent at 30 degrees at the abutting portion and welded. It is a shaped member.

Web 8 is dimensioned high to accommodate the drive, and web 9 is dimensioned to match the height of the middle frame.

In addition, as shown in Fig. 6, the upper flange 4 is narrow in width in order to increase the internal dimensions of the frame, and the upper flange 5 connected to it at the ends is widened to match the flange width of the middle frame to be connected next. There is also a way to do it.

In this case as well, both flanges 4 and 5 are butt welded at the bending point, and plates of any width can be selected for each.

Further, the webs 8 and 9 are located approximately at the center of the upper flanges 4 and 5, respectively, and the internal dimension of the frame is large in the portion of the webs 8.

Directly after the web 9 abuts against the web 8 at the bending point, it is bent laterally and welded so as to be located at the center of the upper flange 5, so as to fit with the web of the middle frame to be connected next.

According to the above method, the upper and lower flanges and the web can be freely manufactured using one independent plate, so that the frame of the passenger conveyor can be freely manufactured with the required dimensions.

However, it has been found that this method has a drawback in that it is difficult to avoid mild stress concentration due to welding distortion and welding defects because the butt welds between the upper and lower flanges and the web are concentrated in two locations.

[Purpose of the invention]

The object of the present invention is to solve the above-mentioned problems and to provide an easy-to-manufacture product.
Moreover, the purpose is to obtain one without stress concentration.

[Summary of the invention]

The present invention provides steps arranged in an endless manner, a balustrade arranged parallel to the steps, a band rail that rotates in synchronization with the steps on the balustrade, and a drive device for driving them on both sides for storing or fixing them. In a passenger conveyor equipped with a frame arranged upright on the floor and connected by a connecting plate on the bottom, the frame is welded to a plate consisting of an independent upper flange, a lower flange, and a vertical web connecting the frames. The upper and lower flanges of the horizontal part and the upper and lower flanges of the inclined part are butt welded at the respective bending points, and the webs of the horizontal part and the inclined part are divided into at least three parts, and the central web of the three parts is divided into three parts. The web has a structure including a 30 degree bend, and these webs are welded together at the straight part.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on the drawings.

As shown in FIG. 7, upper flanges 4, 5 and lower flange 6
．． 7 is butt welded at each bend point, whereas
The web is divided into three parts, and the web 10 is composed of a single plate including a 30 degree bent part, and is butt welded to the webs 11 and 12 at the straight parts on both sides.

According to this, as shown in FIG. 5, the welded portion where the upper and lower flanges meet the web is not concentrated in one place, and there is an effect of avoiding welding distortion and stress concentration due to welding defects.

Also, if the web 11 is a plate configured with a 30 degree bend, and the upper and lower flanges are welded, the web 11 will naturally bend at 30 degrees.
This has the effect of making it possible to create a bent frame.

FIG. 8 shows a modification of the present invention, which differs from FIG. 7 in that reinforcing plates 13 and 14 are welded near the butts of webs 10 and 11 and webs 10 and 12.

This can be used to reinforce the abutting joints of the webs and compensate for any welding defects, thereby providing an H-shaped frame with stable strength.

Although not shown in the drawings, the upper and lower flanges may not be welded at the bending point, but may be formed by bending one continuous plate at 30 degrees and welding it to the web plate.

〔Effect of the invention〕

As described above, according to the present invention, since it is possible to manufacture the FI-shaped road material of any size, it is possible to obtain a frame of any size that matches the required size of the passenger conveyor.

In addition, since the welded portion is not concentrated in one place, it is possible to achieve the remarkable effect that stress concentration due to welding distortion and welding defects can be avoided.

[Brief explanation of the drawing]

Figure 1 is a side view showing the external shape of the passenger conveyor, Figures 2 and 3 are cross-sectional views of the frame of the passenger conveyor, and Figure 4 is an explanatory diagram showing a method for making the framer of the passenger conveyor from conventional H-beam steel. , FIG. 5 is a side view of a frame devised as a means to solve the drawbacks of conventional frames, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is a diagram of a passenger conveyor according to an embodiment of the present invention. FIG. 8 is a side view showing another embodiment of the present invention, and FIG. 9 is a plan view of FIG. 8. 1... Upper frame, 2... Middle frame, 3... Lower frame, 4... Upper flange, 5... Upper flange, 6... lower flange, 7... lower flange, 8... web, 9... web, 10... web,
11...Web, 12...Web, 1
3... Reinforcement plate, 14... Reinforcement plate.

Claims (1)

[Claims] 1. Steps arranged in an endless manner, a balustrade arranged parallel to the steps, a handrail that rotates in synchronization with the steps on the balustrade, and a drive device for driving them, etc., housed or In a passenger conveyor equipped with frames arranged upright on both sides for fixation and connected to the bottom by connecting plates, the frames are each made up of an independent upper flange, a lower flange, and a vertical web connecting the frames. The upper and lower flanges of the horizontal part and the upper and lower flanges of the inclined part are butt-welded at each bending point, and the web of the horizontal part and the inclined part is divided into at least three parts, and the web of the horizontal part and the inclined part are divided into at least three parts, and The frame of the Sulman conveyor is characterized in that the central web includes a 30-degree bend, and these webs are welded together at the straight parts. 2. The frame of a passenger conveyor according to claim 1, characterized in that a reinforcing member is provided in the longitudinal direction near the rear and rear abutting portions of the webs.