JP2012144306A - Step support structure of escalator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a step support structure of an escalator which can easily and accurately support steps on a step shaft, which allows the easy replacement of a bearing without dismantling the step shaft.SOLUTION: The step support structure of the escalator for rotatably supporting the steps 1 of the escalator on the step shaft 3 driven in an advancing direction of the escalator includes: cylindrical step bases 2 which are provided on the steps 1 and has an opening 2a for inserting and separating the step shaft 3; and at least two U-shaped bearings 4, 4 each including a cutout groove 4a for inserting and separating the step shaft which is formed in a disk having an outer shape substantially equal in size to the inside diameter of the step base 2 so as to be extended radially from the center of the disk and opened to the outer periphery thereof. The at least two U-shaped bearings 4, 4 are fitted and held in the step base 2 while being inserted so that the angle positions of the cutout grooves 4a to the step shaft 3 are mutually shifted.

Description

  The present invention relates to an escalator step support structure.

The step of the escalator is rotatably supported by a step shaft connected to a chain driven in the traveling direction of the escalator.
Conventionally, as shown in Patent Document 1, as a method of connecting a step and a step shaft, a bush (fixing tool) provided with an opening and a groove is used, and the bush is deformed to be fitted to the step shaft. The step and the step shaft were connected by fixing the bush integrated with the shaft to the mouthpiece of the step.

  Moreover, as shown in Patent Document 2, a bearing is formed by engaging two parts that can be disassembled in the radial direction of the step shaft, and the step and the step shaft are inserted by inserting the bearing and the step shaft into the step cap. Were connected.

JP 2000-344455 A JP-A-4-292393

However, in the method using a bush provided with an opening and a groove, when it is necessary to increase the bush thickness by design, the strength of the groove decreases to widen the groove, and the holding force of the step shaft decreases. When attaching the step shaft, there is a problem that the bush is permanently deformed and the step mounting accuracy is lowered.
Further, in this method, it is necessary to disassemble the step shaft and the roller in order to attach the bush when it is necessary to replace the bush due to wear or damage of the bush.
Furthermore, in the method of engaging two bearing parts that can be disassembled around the step axis, the replacement of the bearing parts is relatively easy, but the shape of the bearing parts is complicated, the mold cost is high, and the production is troublesome. There was such a problem.

  An object of the present invention is to provide a skater step support structure that can easily and accurately connect and support a step to a step shaft and can easily replace a bearing without disassembling the step shaft and the like. It is what.

  The present invention provides an escalator step support structure that rotatably supports an escalator step on a step shaft driven in the advancing direction of the escalator. The escalator step support structure includes an opening for inserting and removing the step shaft. A cylindrical step cap and a circular plate having an outer shape approximately equal to the inner diameter of the step cap are formed with a step shaft insertion / removal notch groove extending in the radial direction from the center and opening to the outer periphery. The at least two U-shaped bearings are fitted and held in the step cap in a state where the angular positions of the notch grooves with respect to the step shaft are shifted from each other. .

According to the present invention, in the support structure for the step shaft of the step, even when the bearing has high rigidity or the bearing is thick, the bearing accuracy and reliability are satisfied, and the step shaft and the like can be easily disassembled. It has a remarkable effect that the bearing can be replaced.

It is the perspective view and principal part enlarged view which show the step support structure of the escalator by Embodiment 1 of this invention. FIG. 3 is a perspective view showing a step cap and a U-shaped bearing in the first embodiment. FIG. 3 is a cross-sectional view and a side view of a main part showing a state in which a U-shaped bearing is fitted and held in a step base in the first embodiment. It is a schematic perspective view which shows the connection state of the U-shaped bearing by Embodiment 2 of this invention. It is principal part sectional drawing which shows the connection state of the U-shaped bearing by Embodiment 3 of this invention. It is a schematic perspective view which shows the U-shaped bearing by Embodiment 4 of this invention, and its connection state. It is a perspective view of the U-shaped bearing by Embodiment 5 of this invention, and a front view which shows the connection state. It is a perspective view of the U-shaped bearing by Embodiment 5 of this invention, and a front view which shows the connection state. It is principal part sectional drawing which shows the movement prevention structure of the U-shaped bearing by Embodiment 6 of this invention, and the partial side view which shows a clamp metal fitting. FIG. 12 is a cross-sectional view of a main part showing another example of a U-shaped bearing movement preventing structure according to Embodiment 6.

Embodiment 1 FIG.
1 is a schematic perspective view showing a step support structure for an escalator according to Embodiment 1 of the present invention. In FIG. 1, step 1 of the escalator is rotatably connected and supported by a step shaft 3 driven in the advancing direction of the escalator by a chain (not shown).
The step shaft 3 is arranged in parallel with the longitudinal direction of the step 1, and in the step 1, a cylindrical step base 2 having openings 2a for inserting and removing the step shaft 3 at both ends in the longitudinal direction (FIG. 2A). Reference) is provided. Each of the step caps 2 is rotatably supported on the step shaft 3 via at least two U-shaped bearings 4 and 4.
As shown in FIG. 2 (b), each U-shaped bearing 4 is a step shaft that extends in the radial direction from its central portion and opens to the outer peripheral portion in a disc having an outer shape approximately equal to the inner diameter of the step cap 2. A notch groove 2a for insertion / removal is formed and has a substantially U shape as a whole.

  In the first embodiment, when the step shaft 3 is fixed to the step base 2, two U-shaped bearings 4 are prepared, and one is an opening of the notch groove 4a as shown in the enlarged view of the A part of FIG. Is inserted into the step shaft 3 from the lower side of the step shaft 3, and the remaining one is inserted into the step shaft 3 from the upper side of the step shaft 3 with the opening of the notch groove 4a down, The U-shaped bearings are slid in the axial direction to fit and hold the two U-shaped bearings 4 and 4 in the step cap 2 as shown in FIG.

By fitting and holding the two U-shaped bearings 4 and 4 in the step base 2 in this way, the step base 2 and the step shaft 3 are assembled together, and the chain and the roller that drive the step shaft 3 are disassembled. The step 1 can be connected and supported to the step shaft 3 without any problem.
In addition, because of the strength and arrangement, even if the diameter of the U-shaped bearing 4 is increased or the rigidity is increased, the shape itself can be handled without change, so that a design change is not necessary.

When exchanging the U-shaped bearing 4, if the U-shaped bearing 4 is slid in the axial direction of the step shaft 3 and removed from the step base 2, it can be easily removed from the step shaft 3 using the opening of the notch groove 4a. Can be removed.

  As described above, the first embodiment is provided in step 1 in the step support structure of the escalator that rotatably supports step 1 of the escalator on the step shaft 3 that is driven in the traveling direction of the escalator. A cylindrical step base 2 having an opening 2a for inserting and removing the step shaft 3 and a disk having an outer shape approximately equal to the inner diameter of the step base 2 extend radially from the center to the outer periphery. At least two U-shaped bearings 4, 4 formed with notch grooves 4 a for inserting and removing the step shaft, which are opened in the section, and at least two U-shaped bearings 4, 4 are provided with notched grooves 4 a for the step shaft 3. Are fitted and held in the step cap 2 with the angular positions of the bearings being offset from each other, so that the bearing accuracy and reliability can be improved even when the bearing rigidity is high or the bearing is thick. It added, and, without disassembling the step shaft or the like, can be easily bearing replacement.

Embodiment 2. FIG.
In the first embodiment, two U-shaped bearings are used. However, three or more U-shaped bearings 4 may be connected as shown in FIG.
In this case, since the support location of a bearing can be increased, the load of a step can be received stably. For example, by connecting four U-shaped bearings 4 in the axial direction and inserting the U-shaped bearings 4 into the step cap, the U-shaped bearing 4 can be supported at two locations in the upward and downward directions, so that the step and the step shaft can be stably supported.

  Furthermore, in normal escalator operation, a load is applied from the top to the bottom of the step on the outbound side where people ride, but the load is rarely applied from the bottom to the top, and the step is reversed on the return side, so that the step is up from the bottom The load is applied. Since it is sufficient to support the weight of the step on the return path side, the strength may be lower than that on the forward path side of the step. For example, as shown in FIG. 4, two U-shaped bearings 4 with the opening facing upward are opened between them. By inserting one U-shaped bearing 4 with the portion facing downward, the load from above can be supported by the two bearings, so that the step load can be stably supported. In this way, by changing the support rigidity between the forward path side and the return path side of the step, it is possible to ensure the strength with the minimum necessary component configuration.

  Further, since the width of the U-shaped bearing 4 is changed in accordance with the load received by the U-shaped bearing 4 and the bearing width is reduced in a direction where no load is applied, the bearing can be designed according to the load applied to the bearing. Material costs can be reduced.

Embodiment 3 FIG.
As shown in FIG. 5 (a), a plurality of protrusions 4b are provided on one U-shaped bearing 4 on the side surface where the U-shaped bearings contact each other, and a plurality of holes are provided on the other U-shaped bearing 4 corresponding to the protrusion 4b. 4c may be provided, and the U-shaped bearings 4, 4 may be connected to each other by engaging them with the step shaft 3 attached thereto.
In this way, since the U-shaped bearing 4 does not come off the step shaft after being connected, the bearing mounting workability is improved without dropping on the U-shaped bearing 4.
Further, the protrusion 4b provided on the U-shaped bearing 4 is shaped like a key and cannot be detached once engaged, so that the bearing is not separated during product operation, and the reliability of the bearing is improved.

  Further, as shown in FIG. 5 (b), three U-shaped bearings 4 are arranged, protrusions 4c are provided on both side surfaces of the central U-shaped bearing 4, and holes 4c are formed in the U-shaped bearings 4 and 4 at both ends. By providing, three bearings can be easily connected together, and the reliability and mounting workability of the bearings can be improved.

Embodiment 4 FIG.
When the U-shaped bearing 4 is assembled, if the mounting angle with respect to the step shaft 3 is wrong, the notched grooves 4a gather in the same direction, and the angular positions of the notched grooves 4a with respect to the step shaft 3 cannot be set so as to be offset from each other. The bearing strength may not be obtained.
Therefore, in order to determine the angular position of the notch groove 4a with respect to the step shaft 3, a positioning projection 4d is provided on the outer peripheral surface of the U-shaped bearing as shown in FIG. 6 (a). If the positioning protrusions 4d are positioned together as described above, a decrease in bearing strength due to an incorrect mounting angle can be eliminated.

  Further, if one or more mounting angles of the plurality of protrusions 4b provided on the U-shaped bearing 4 shown in Embodiment 3 are not equally divided, the direction of connection between the U-shaped bearings Can be determined uniquely, and a decrease in bearing strength due to an incorrect mounting angle can be eliminated.

Embodiment 5 FIG.
When the U-shaped bearing 4 is combined and there is a concern about a decrease in rigidity due to the notch groove 4a, a protruding portion 4e is provided on the side surface of the U-shaped bearing 4 as shown in FIG. The bearing 4 may be reversed so that the protrusion 4e is fitted into the notch groove 4a.
In this way, after assembly, as shown in FIG. 7B, the two U-shaped bearings 4 and 4 can be integrally fitted so that the notch groove 4a is filled with the protruding portions 4e. Therefore, a decrease in rigidity of the U-shaped bearing can be suppressed.

  Furthermore, if the notch groove 4a and the protrusion 4e are processed into a taper shape as shown in FIG. 8A, the U-shaped bearing 4 having the same shape is inverted as shown in FIG. As a result, the lowering of rigidity due to the notch groove 4a can be suppressed, and the two U-shaped bearings are restrained in the axial direction and are not divided after the step assembly, so that the assembly workability is improved.

Embodiment 6 FIG.
In each of the above embodiments, there is a possibility that the U-shaped bearing 4 moves in the axial direction of the step shaft 3. However, when it is necessary to prevent this, as shown in FIG. 5 is fitted to the step shaft 3 at the side end portion of the step base 2, and the clamp metal fitting 5 is deformed by fastening it with bolts and nuts 5 a and fixed to the step shaft 3.

  In addition, in FIG. 9, two clamp fittings 5 are required for one step base 2 and four in total are required for each step, but either one of the two U-shaped bearings as shown in FIG. As one U-shaped bearing, a flanged U-shaped bearing 4 in which a flange portion 4f that abuts the side end of the step base 2 is formed on one side surface is inserted into and removed from the step base 2 from one direction of the step shaft 3. In addition to connecting the U-shaped bearings to each other and fixing the clamp bracket 5 only to the step shaft 3 on the flanged U-shaped bearing side, it is only necessary to attach the clamp bracket 5 to the left and right for each step. The movement of the U-shaped bearing 4 in the axial direction can be prevented.

1 step, 2 step cap, 2a opening, 3 step shaft, 4 U-shaped bearing, 4a
Notch groove, 4b protrusion, 4c hole, 4d positioning protrusion, 4e protrusion, 4f flange, 5 clamp bracket, 5a bolt / nut

Claims (8)

In the step support structure of the escalator that rotatably supports the step of the escalator on a step shaft driven in the traveling direction of the escalator,
A cylindrical step base provided in the step and having an opening for inserting and removing the step shaft;
At least two U-shaped notches for step shaft insertion / removal formed in a circular plate having an outer shape approximately equal to the inner diameter of the step cap and extending in the radial direction from the center portion and opening in the outer peripheral portion. With bearings,
An escalator step support structure characterized in that at least the two U-shaped bearings are fitted and held in the step cap in a state where the angular positions of the notch grooves with respect to the step shaft are shifted from each other. .   2. The step support structure for an escalator according to claim 1, wherein three or more U-shaped bearings are inserted into the step shaft.   Of the at least two U-shaped bearings, a protrusion formed in the axial direction of the step shaft is provided on one side surface of at least one U-shaped bearing, and the protrusion is formed on the side surface of another U-shaped bearing. The step support structure for an escalator according to claim 1, wherein the U-shaped bearings are connected to each other by engaging with a hole.   4. The positioning projection for positioning the U-shaped bearing so that the angular positions of the notch grooves with respect to the step shaft are shifted from each other on the outer peripheral surface of each U-shaped bearing. Escalator step support structure.   Protrusions that can be fitted with the notch grooves are provided on the side opposite to the opening of the U-shaped bearing, and the two U-shaped bearings are fitted together by reversing the U-shaped bearing of the same shape. The step support structure for an escalator according to any one of claims 1 to 4.   6. The escalator according to claim 5, wherein the protruding portion has a tapered shape that expands in the axial direction of the step shaft, and the notched groove is formed in a tapered shape that can be fitted to the tapered protruding portion. Step support structure.   The clamp fitting which prevents the movement to the axial direction of the said U-shaped bearing is fixed on the said step axis | shaft of the side edge part of the said step cap, The Claim 1 thru | or 6 characterized by the above-mentioned. Escalator step support structure.   Of the at least two U-shaped bearings, a flanged U-shaped bearing in which a flange portion that contacts the side end portion of the step cap is formed on one side surface as one U-shaped bearing, and the flanged U-shaped bearing is used. 8. The step support structure for an escalator according to claim 7, wherein the clamp fitting is fixed only to the step shaft on the shape bearing side.

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