JP4902175B2 - Escalator step structure - Google Patents

Description

  The present invention relates to a step structure of an escalator in which a step plate is integrally joined to a reinforcing plate by mechanical fitting that does not cause appearance deterioration.

  The escalator step is equipped with a cleat for passengers and a riser to block the step. The cleat has a plurality of grooves extending in the step traveling direction to prevent slipping, and is an extruded aluminum material that has been formed into a predetermined cross-sectional shape by extrusion, a predetermined shape of aluminum die casting, a steel sheet product that has been bent into a predetermined uneven shape, etc. Is used. Steel strip cleats with excellent wear resistance have begun to be used in aluminum extruded profiles and die cast materials because the grooves are easily crushed. Steel sheet cleats are also advantageous in that the pitch and size of the grooves can be freely changed according to the processing conditions during bending, and a step member suitable for the escalator installation site can be easily provided.

  In the step (Fig. 1a) using a steel plate cleat and riser, a stainless steel plate having excellent corrosion resistance is used. The steel sheet is bent to produce a cleat 1 having a shape in which protrusions 1p and grooves 1g are formed at a predetermined pitch. Cleat 1 (FIG. 1 b) is joined to reinforcing plate 2 and further joined to reinforcing body 3. Similarly, the riser 4 is made of a steel plate in which a plurality of protrusions and grooves are formed by bending, and is joined to the reinforcing body 3 (FIG. 1c). In the corner between the cleat 1 and the riser 4, a demarcation cleat 5 that displays a dangerous part is mounted.

When joining the cleat 1 and the reinforcing plate 2, a method of spot welding by sandwiching the groove bottom portion of the cleat 1 and the reinforcing plate 2 between a pair of electrodes is generally used (Patent Document 1). The riser 4 and the reinforcing body 3 are also joined by the same spot welding.
JP-A-57-57184

In spot welding, an electrode needs to be inserted into the narrow groove 1g between the protrusions 1p and pressed against the bottom surface of the groove 1g. For this reason, it is difficult to set the electrodes, and poor welding tends to occur if the contact state of the electrodes is poor. In addition, deterioration of the appearance of the product due to welding marks generated on the bottom surface of the concave groove 1g is inevitable. However, it is difficult to remove weld marks in a narrow space between the protrusions 1p by polishing after welding.
Although it is possible to cover the weld traces by painting after welding, special coating techniques are required in order to uniformly coat uneven items. Even if the weld mark is covered with the coating film, the appearance deteriorates when the coating film is partially peeled off or dropped. Furthermore, in painting repair, in addition to the complexity of the production line, there are concerns about the deterioration of the working environment and the burden on environmental conservation.

Painting is a process necessary to cover the welding marks and suppress rusting of the steel sheet. If the stainless steel sheet with excellent corrosion resistance is used as the material for cleats and risers, it can be joined to the reinforcing plate (reinforcing body) by a mechanical method. The painting process can be omitted. The fact that no painting is required after joining means that the beautiful metal surface inherent to stainless steel can be used for the tread surface, and it is possible to construct an escalator with a novel design that has never existed before.
The present invention is based on the premise that spot welding is omitted, and a step structure in which the creek and riser are firmly joined to the reinforcing plate (reinforcing body) by adopting mechanical fitting utilizing the uneven pattern of the creek and riser is adopted. It aims at providing the escalator which has.

  The step structure of the present invention mechanically fits a cleat and riser made of stainless steel with excellent corrosion resistance and a reinforcing plate (reinforcing body) made of high strength steel plate, low alloy steel plate, plated steel plate, etc. with good corrosion resistance. They are integrated with each other. In the cleat and riser, a plurality of protrusions and grooves extending in the step traveling direction by bending a stainless steel plate are formed at a predetermined pitch.

As the material for the cleat and riser, a coated stainless steel plate provided with a colored coating film for improving the design of the cleat and riser in advance or a clear coated stainless steel plate exhibiting metallic luster can be used.
The reinforcing plate is a member that supports the cleat from the back surface, and is formed with a protrusion that meshes with the concave groove of the cleat as viewed from the back side. The reinforcing body is a member that constitutes the frame of the step, and is similarly formed with a protrusion that engages with the concave groove of the riser when viewed from the back side. Hereinafter, the reinforcing plate and the reinforcing body are represented by “reinforcing plate”.

  A step in which the cleat and the riser are integrated with the reinforcing plate is assembled by engaging the protrusions of the reinforcing plate with the concave grooves of the cleat and riser. The protrusions of the reinforcing plate can be formed by partially raising the reinforcing plate (reinforcing body) in addition to pressing. Burrs and partial bulges that occur during drilling can also be used to engage cleats and risers. The slippage and slippage between the cleat and the riser and the reinforcing plate can be prevented by inserting the protrusions provided on the cleat and riser into the holes provided on the reinforcing plate.

Effects and embodiments of the invention

In the step structure according to the present invention, a cleat and a riser made of stainless steel are integrally coupled to a reinforcing plate and a reinforcing body by mechanical engagement. In the following description, the integral joining of the cleat and the reinforcing plate is taken as an example, but the riser and the reinforcing body are also integrally joined by the same mechanical engagement.
The cleat 10 is formed with a plurality of protrusions 11 and grooves 12 extending at a predetermined pitch by bending a stainless steel plate cut into a predetermined size (FIG. 2). Since the stainless steel plate with good corrosion resistance is used as the material, the metallic luster of the substrate can be utilized without requiring painting or plating. In addition, a coated stainless steel plate or a clear coated stainless steel plate provided with a design pattern by providing a coating film that does not cause defects such as coating film cracking even when bent can be used as the material.

  The cleat 10 is coupled to the reinforcing plate 20 by mechanical engagement, and is fixed to the step frame (the reinforcing body 3 in FIG. 1) via the reinforcing plate 20. As for the reinforcing plate 20, a steel type to be used is determined by selecting a material with emphasis on strength, and a high strength steel plate, a low alloy steel plate, a plated steel plate, or the like is used. The plated steel sheet includes a zinc-based plated steel sheet and an aluminum-based plated steel sheet. High corrosion resistance Zn-Al-Mg alloy-plated steel sheets, Zn-Al alloy-plated steel sheets, and the like are suitable as the base plate of the reinforcing plate 20.

  The base plate is bent to form a channel shape having the seating portion 25, but the bending is also effective in increasing the rigid body strength of the reinforcing plate 20. The seating portion 25 is a place where screws, screws, and the like are driven when the reinforcing plate 20 is fixed to the step frame. The reinforcing plate 20 is arranged with its longitudinal direction orthogonal to the ridges 11 and the concave grooves 12 of the cleat 10, but the projections 21 are formed at the same pitch as the ridges 11 and the concave grooves 12 on the top surface 26 that contacts the cleat 10. ing.

  Although press working can be employed for forming the protrusions 21, partial cutting of the base plate, burrs during drilling, and partial bulging can also be used for the protrusions 21. It is possible to fit and integrate the reinforcing plate 20 having the protrusions 21 formed in advance with the cleat 10, but in order to obtain a high-strength mesh joint, the base plate of the reinforcing plate 20 is overlapped with the cleat 10. It is preferable to perform processing such as pressing, cutting and punching at a predetermined portion of the reinforcing plate 20.

FIG. 2 shows a reinforcing plate 20 using the burr 21a generated by the drilling as the engaging protrusion 21. As shown in FIG.
Since the protrusions 21 are engaged with the protrusions 11 of the cleat 10 from the back side, the top surface 26 of the reinforcing plate 20 is perforated under conditions where a large amount of burrs 21a are generated unlike normal punching. At the time of drilling, when the engaging protrusion 13 (FIG. 3) formed on the lower surface of the concave groove 12 of the cleat 10 is fitted into the engaging hole 23 of the top surface 26, the displacement between the cleat 10 and the reinforcing plate 20 is prevented and an accurate position is obtained. The relationship is maintained.

  The shape of the opening portion 22 generated by the drilling is set to a width that is long along the ridge 11 and substantially equal to the inner method w of the ridge 11. When the reinforcing plate 20 stacked on the cleat 10 is drilled, the generated burr 21a is pressure-bonded to the inner side surfaces 11a and 11b of the protrusion 11 (FIG. 3). In forming the burr 21a having an effective shape for the integration of the cleat 10 and the reinforcing plate 20, a cut is made in advance at both edges and the center with respect to the longitudinal direction of the opening 22, or the edges and It is preferable to use a die having a shape preceded by cutting.

  The cleats 10 and the reinforcing plates 20 are integrated with sufficient strength by pressing the burrs 21a to the inner surfaces 11a and 11b of the ridges on both sides. The bonding strength can be adjusted by the size and number of burrs 21a. The larger the size and number of burrs 21a, the stronger the cleat 10 is integrated with the reinforcing plate 20. However, the excessive burr 21a may cause an increase in the area of the opening 22 in the top surface 26 of the reinforcing plate 20, which may cause a reduction in strength of the reinforcing plate 20 itself. In view of this point, the bonding strength and the material strength of the reinforcing plate 20, it is preferable to appropriately determine the size, number and distribution of the burrs 21a.

In FIG. 2, the burr 21 a effective for mechanical engagement is formed in a shape that is open on both sides around the center line in the longitudinal direction of the opening 22. The double-open burrs 21a are pressure-bonded to the inner surface 11a, 11b of the ridge 10 at the same position to stabilize the positional relationship of the cleat 10 with respect to the reinforcing plate 20.
Instead of the double-opening burr 21a, the cleat 10 and the reinforcing plate 20 can be engaged with each other by a single-opening burr 21b (FIG. 4a) or a partial raised portion 21c (FIG. 4b).

The single-open burr 21b has an upright height twice that of the double-open burr 21a. Therefore, the burr 21b is fed deeply into the inner surfaces 11a and 11b of the ridges to support the cleat 10 from the back surface. In this case, when the burrs 21b and 21b are raised from both sides of the opening 22 by equally dividing the longitudinal direction of the opening 22, an equal meshing force is applied to the ridge inner side surfaces 11a and 11b on both sides.
The raised portion 21c has an advantage that it does not have a cut end surface that is likely to be a starting point of corrosion, although it has a smaller area in close contact with the ridge inner side surfaces 11a and 11b of the cleat 10 than the burrs 21a and 21b. In particular, the reinforcing plate 20 made of a plated steel plate can utilize the original corrosion resistance of the material because a cut end surface that cannot be expected to prevent the corrosion protection of the plating layer does not occur.

  It is also possible to improve the joint strength between the cleat 10 and the reinforcing plate 20 by meshing the protruding portions 29 (FIG. 5), which are largely plastically deformed, with the inner surfaces 11a and 11b of the ridges. In this case, a set of two slits 29a is put in advance at a place where the deformed raised portion 29 is formed. The width p of the slits 29a, 29a is set to be approximately equal to the inner w of the ridge 11.

  After positioning the cleat 10 on the reinforcing plate 20, the deformed portion 29b between the slits 29a and 29a is pushed between the ridge inner side surfaces 11a and 11b. Since the pushing force acts on the deformed portion 29b having the narrow width p, the deformed portion 29b is stretched (plastic deformation) with a relatively small force, and the deformed raised portion 29 that penetrates deeply into the protrusion 11 is formed. As a result, the meshing length of the deformed raised portion 29 with respect to the inner surface 11a, 11b of the ridge is increased, and the joining strength is increased. Since a high bonding strength can be obtained, it is only necessary to form the deformed ridge 29 in the central portion of the reinforcing plate 20 in the width direction, not in a multi-row arrangement, and the number of the deformed ridges 29 can be reduced in the longitudinal direction of the reinforcing plate 20. The

The cleat 10 integrated with the reinforcing plate 20 by mechanical engagement does not have defects on the surface, such as weld marks, seen in the cleat 10 integrated by welding. Moreover, the processing operation for engaging the burrs 21a, 21b or the raised portions 21c, 29 with the inner side surfaces 11a, 11b is set on the back side of the cleat 10, and the influence of processing deformation does not reach the surface side of the cleat 10. Therefore, the cleat 10 exhibits the original beautiful surface even after being integrated with the reinforcing plate 20.
The fact that the appearance of the cleat 10 does not change before and after the integration means that a conventional painting process of covering up welding marks and the like is not required, and the beautiful metal surface inherent to stainless steel can be used for the step frame of the escalator. Since the metal surface can be used, the degree of freedom of design applied to the step frame is greatly expanded. As a result, it becomes a step frame that has much better design than a step frame assembled by conventional welding.

In this way, stainless steel with good corrosion resistance and beautiful surface is used as the material for cleats and risers, and high-strength steel plates, low-alloy steel plates or plated steel plates with good corrosion resistance and high mechanical strength are used as reinforcement plates and reinforcement materials. In addition, since the cleat, riser, reinforcing plate, and reinforcing body are integrated by mechanical engagement, an escalator step having excellent durability and high commercial value can be provided without requiring a painting process after assembly.
The step structure of the present invention is premised on not welding. The mechanical engagement described above is applied to the integration of the cleat 10 and the reinforcing plate 20 and the integration of the riser and the reinforcing body, but the following joint structure is also used when fixing the reinforcing plate 20 to the step frame. The welding process can be omitted.

Extension portions protruding in the width direction from a plurality of positions on both side edges along the longitudinal direction of the reinforcing plate 20 are bent into a U-shape, and female screws 28 are formed on the fixing surface 27 parallel to the seating portion 25 (FIG. 6). ). In the illustrated example, three female screws 28 are provided on both side edges, but the number of female screws 28 is appropriately determined according to the size of the reinforcing plate 20. Reinforcing plate 20 is fixed to the step frame by screwing and tightening a leg end of a bolt (not shown) inserted into the bolt hole of the step frame into female screw 28.
Alternatively, a female screw may be formed on the step frame side, and a flat inner surface bolt insertion hole through which the bolt shaft is inserted from the seating portion 25 side may be formed in the fixing surface 27. In this case, the bolt head is positioned between the seating portion 25 and the fixing surface 27 and is seated on the fixing surface 27.

  As described above, the cleat 10 and the reinforcing plate 20 are integrated by mechanical engagement in which the burrs 21a and 21 or the raised portions 21c and 29 of the reinforcing plate 20 are pressed against the inner surface 11a and 11b of the ridge 10 of the cleat 10. . In this joint structure, surface defects such as weld marks found in conventional weld joints do not occur on the outer surface of the cleat 10, so that the original beautiful surface of stainless steel that is the material of the cleat 10 can be utilized, and the conventional steps A step frame is provided that gives an impression not found in the frame. Further, since the ridge 11 is supported from the inside by the burrs 21a and 21 or the raised portions 21c and 29 engaged with the inner surfaces 11a and 11b of the ridge, it is possible to prevent the cleat 10 from being deformed. Furthermore, since it can be integrated by mechanical engagement, the step frame assembly process is also simplified.

A perspective view showing a conventional step frame (a) and a sectional view of a cleat (b) and a riser (c) Explanatory drawing of assembling a step frame that integrates cleats and reinforcing plates by mechanical engagement Sectional view showing the joint between the integrated cleat and riser Perspective view showing a single-open burr (a) and bulge (b) to be crimped to the inner surface of the ridge of the cleat Exploded perspective view of a step frame that integrates cleats and reinforcing plates via a large plastic deformed ridge. The perspective view which shows the reinforcement board provided with the adhering part with respect to a step frame.

Explanation of symbols

10: Cleat 11: ridge 11a, 11b: inner surface 12: groove 13: locking projection
20: Reinforcing plate 21: Protrusion 21a: Double-opening burr 21b: Single-opening burr 21c: Raised part 22: Opening part 23: Engagement hole 25: Seating part 26: Top face 27: Fixing face 28: Female thread 29 : Deformed raised part 29a: Slit 29b: Deformed part
w: Internal law of ridge p: Width of slit 29a

Claims (4)

  A stainless steel cleat and riser having a plurality of protrusions and concave grooves extending in the step traveling direction and formed at a predetermined pitch, and a reinforcing plate and a reinforcing body for supporting the cleat and the riser from the back surface, the cleat, The protrusions that are crimped to the inner surface of the ridge of the riser are formed on the reinforcing plate and the reinforcing body, and the cleat, the riser, the reinforcing plate, and the reinforcing body are integrated by mechanical engagement between the inner surface of the ridge and the protrusion. An escalator step structure characterized by that.   A burr generated by pressure-piercing the cleat and riser on the cleat and riser side at the position facing the cavity defined by the ridges is used as a mechanical engagement protrusion. The step structure according to Item 1.   2. A raised portion formed by pushing a reinforcing plate and a reinforcing body superimposed on a cleat and a riser toward a cleat and a riser at a position facing a cavity defined by a ridge is used as a protrusion for mechanical engagement. Step structure as described.   Cleats and risers are provided with locking projections on the bottom of the concave grooves, and engagement holes are formed in the corresponding reinforcing plates and reinforcing bodies. By engaging the locking projections in the engagement holes, the cleats and risers are reinforced. The step structure according to claim 1, wherein the positional relationship between the plate and the reinforcing body is fixed.

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