JP2013006699A - Support structure of elevator rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems in conventional elevators wherein, when a vertical clearance of brackets becomes long, a rail deflects and it is possible that the rail cannot keep bending strength of the rail due to horizontal loads of a car and a balancing weight in case of an earthquake, and thereby, a rail with an increased cross sectional area must be used to cause increase in cost of the rail.SOLUTION: The support structure of the elevator rail, having a steel plate-molded rail including a U-shaped molded part and brackets supporting the steel plate-molded rail, is provided with the brackets that are set in such a manner that one face constituting the steel plate-molded rail and one face of the bracket come into surface contact with each other in the surfaces thereof in a face that is determined by the head part direction of the steel plate-molded rail and the rail axial direction of the steel plate-molded rail.

Description

  The present invention relates to a support structure for a steel sheet forming rail formed by bending a steel sheet in an elevator rail.

  In a conventional elevator, a car and a counterweight are supported by guide rails installed in a hoistway. The guide rail is fixed in the hoistway through brackets and rail clips provided on the building side. If the fixing interval by the rail clip becomes longer in the vertical direction, the rail may be greatly bent due to the horizontal load of the car and the counterweight due to the earthquake, and the bending strength of the rail may not be maintained. Therefore, in order to increase the bending rigidity of the rail, it is necessary to use a rail having a large cross-sectional area and to increase the cross-sectional secondary moment of the rail compared to the rail before the rail fixing interval is lengthened in the vertical direction. There was a problem that caused an increase in the cost of the rail. As a conventional technique for solving this problem, a guide rail support structure is known in which a beam extending in the vertical direction of a hoistway is provided from a bracket fixed to a building, and a rail clip is provided on the upper and lower ends of the beam (for example, Patent Document 1).

U.S. Pat. No. 4,997,983

  In the conventional elevator rail support structure disclosed in Patent Document 1, the rail is supported by rail clips at two positions that are approximately 1/3 of the rail fixing interval in the vertical direction from the bracket. Since it can be narrower than the configuration, the deflection of the rail that receives a horizontal load can be suppressed. Therefore, it is not necessary to use a rail having a large cross-sectional area in which the cross-sectional secondary moment of the rail is increased, so that the cost of the rail itself is not increased.

  However, it is necessary to newly install a beam extending in the vertical direction of the hoistway from the conventional bracket structure, resulting in an increase in cost due to an increase in the number of parts. Furthermore, since the rail is supported at a vertical position away from the bracket, a larger bending moment is generated in the bracket than in the conventional configuration. In order to suppress the bending deformation of the bracket due to the bending moment, it is necessary to take measures to strengthen the bending rigidity by increasing the plate thickness with respect to the conventional bracket, which further increases the cost.

  The present invention has been made in order to solve the above-described problems, and a simple rail support structure using a guide rail (hereinafter referred to as a steel plate forming rail) formed by bending a steel plate into a T shape, The object is to reduce the cost of the rail and the rail support member by suppressing the deflection.

  An elevator rail support structure according to the present invention is an elevator rail support structure having a steel plate forming rail including a U-shaped forming portion and a bracket for supporting the steel plate forming rail, and one surface constituting the steel plate forming rail. And one surface of the bracket is set such that the surfaces thereof are in surface contact with each other within the plane determined by the head direction of the steel plate forming rail and the rail axial direction of the steel plate forming rail. is there.

  According to this invention, since the inclination of the rail at the rail clip support point can be suppressed by restraining the flange portion of the steel sheet forming rail to the bracket by surface contact, it is possible to bend the rail without significantly changing the bracket structure. Deformation can be reduced. Therefore, the bending strength of the rail can be maintained without using a rail having a large cross-sectional area. Furthermore, since the guide rail itself can be replaced with an inexpensive steel sheet forming rail formed by bending a steel sheet instead of a steel rail by rolling or extrusion, the rail cost can be reduced.

It is a block diagram of the rail support structure in Embodiment 1 of this invention. It is an expanded view of the rail support structure in Embodiment 1 of this invention. It is the figure which looked at the rail support structure in Embodiment 1 of this invention from the perpendicular direction. It is a block diagram of the rail support structure in Embodiment 2 of this invention. It is an expanded view of the rail support structure in Embodiment 2 of this invention. It is the figure which looked at the rail support structure in Embodiment 2 of this invention from the perpendicular direction. It is a block diagram of the rail support structure in Embodiment 3 of this invention. It is an expanded view of the rail support structure in Embodiment 3 of this invention. It is the figure which looked at the rail support structure in Embodiment 3 of this invention from the perpendicular direction. It is another block diagram of the bracket in Embodiment 3 of this invention. It is another block diagram of the bracket in Embodiment 3 of this invention. It is another block diagram of the bracket in Embodiment 3 of this invention. It is a block diagram of the rail support structure in the conventional elevator. It is the figure which looked at the rail support structure in the conventional elevator from the perpendicular direction. It is a figure which shows the state which received the horizontal load and the rail deform | transformed. It is a figure which shows the state of the bracket support point produced by the rail deformation | transformation by a horizontal load. It is an expanded view of the bracket in Embodiment 2 of this invention. It is a block diagram of the rail support structure in Embodiment 4 of this invention. It is an expanded view of the rail support structure in Embodiment 4 of this invention. It is the figure which looked at the rail support structure in Embodiment 4 of this invention from the perpendicular direction. It is an expanded view of the rail support structure in Embodiment 5 of this invention. It is the figure which looked at the rail support structure in Embodiment 5 of this invention from the perpendicular direction. It is a block diagram of the rail support structure in Embodiment 6 of this invention. It is an expanded view of the rail support structure in Embodiment 6 of this invention. It is the figure which looked at the rail support structure in Embodiment 6 of this invention from the perpendicular direction. It is an expanded view of the bracket in Embodiment 6 of this invention.

Embodiment 1 FIG.
The first embodiment will be described below with reference to the drawings.
1 is an explanatory view showing a rail support structure according to Embodiment 1 of the present invention, FIG. 2 is a development view of the rail support structure, and FIG. 3 is a horizontal plane when FIG. 1 is viewed from below (minus direction of the Z axis). FIG. FIGS. 13 and 14 are views for comparison with the present invention, and are a perspective view of a conventional rail support structure and a horizontal plane view as seen from the negative direction of the Z-axis.

  A conventional rail support structure will be described with reference to FIG. A car and a counterweight (not shown) travel up and down along rails 1 provided on the left and right, respectively. The rail 1 is supported by a bracket 2 via a beam (not shown) provided on the building side. A plurality of brackets 2 are installed in the vertical direction at a predetermined interval in the hoistway. The bracket 2 and the rail 1 are connected by a rail clip 3. In the above, the axial direction of the rail is Z, and in the horizontal plane perpendicular to the Z axis, the direction toward the other rail facing the rail 1 is X, and the direction perpendicular to the X axis and the Z axis is Y. .

  Details of the connection by the rail clip will be described with reference to FIG. The cross section of the rail 1 is generally T-shaped, and a car and a counterweight guide device (not shown) slide on the rail head (A portion in the figure). Further, the rail flange (B portion in the figure) is in contact with the bracket 2 and is connected to the bracket 2 by the rail clip 3. The force with which the rail clip 3 holds the rail 1 is properly managed by the bolt 4.

  If the car and counterweight receive a force in the XY horizontal plane due to an earthquake or emergency stop action, the rail will be applied in the X-axis direction (left-right direction) and Y-axis direction (front-back direction) in FIG. Receive vibration. In this case, as shown in FIG. 15, the rail is deformed in the horizontal direction by receiving the excitation force P, and the vertical installation interval of the bracket 2 is set so as not to cause plastic deformation of the rail or dropping of the guide device from the rail. The horizontal displacement of the rail is suppressed by narrowing or using a rail having a large cross-sectional area.

  In the conventional design, the rail 1 supported by the bracket 2 and the rail clip 3 restrains translational displacement with the rail clip 3 as a fulcrum, but is supported freely with respect to rotation. However, as shown in FIG. 13, since the bracket 2 configured in an L shape is in surface contact with the rear surface of the rail flange, rotation around the Y axis is suppressed to some extent. Therefore, the deformation of the rail is smaller than that in the state of free rotation support.

  On the other hand, there is no bracket 2 that suppresses the rotation of the rail 1 with respect to the rotation around the X axis, and the movement of the rail 1 is suppressed only by the rail clip 3 as shown in FIG. The rotation is not suppressed.

  In the present embodiment, an effective method for suppressing the rotation around the X axis is realized by using a steel plate forming rail. The rail support structure of the present embodiment will be described with reference to FIG. The rail 10 is a steel plate forming rail formed by bending a steel plate into a T-shape, and the portion constituting the rail head (A portion in the figure) is U-shaped by bending the steel plate, The inside is hollow. Further, the central portion (C portion in the figure) of the rail flange portion (the portion other than the portion constituting the U-shape of the steel sheet forming rail, the same applies hereinafter) is in an open state.

  The steel plate forming rail 10 is fixed to the bracket 2 via the rail clip 3 with the same configuration as that of FIG. FIG. 2 is a component diagram in which FIG. 1 is developed. Unlike FIG. 13, the bracket 2 has a convex portion 2 a formed at the central portion of the bracket. The convex part 2a may be integrally molded with the bracket 2, or may be fixed to the bracket 2 molded separately from the convex part 2a by welding or bolts.

  Next, the function of the convex part 2a is demonstrated using FIG. The convex part 2a is inserted so that it may closely_contact | adhere to the hollow part (D part in a figure) of the steel plate forming rail 10. FIG. Of the surfaces constituting the steel plate forming rail 10, the surface forming the inner surface of the hollow portion D and the outer surface of the convex portion 2a of the bracket 2 are the X-axis direction (the head direction of the steel plate forming rail 10) and Z It is set so that the surfaces thereof are in surface contact with each other within the plane determined in the axial direction (the rail axial direction of the steel sheet forming rail 10). Accordingly, when the steel plate forming rail 10 receives a load in the Y-axis direction and tries to deform in the Y-axis direction, the convex portion 2a suppresses the rotation of the steel plate forming rail 10 around the X axis, as shown in FIG. Rail deformation in the Y-axis direction can be suppressed.

  Thus, by using the steel plate forming rail 10, the rail clip 3 of the conventional configuration and the bracket 2 in which only the convex portion 2a is added to the bracket of the conventional configuration, the X axis around which could not be suppressed by the conventional rail configuration. Rotation can be suppressed without significantly changing the conventional configuration. As a result, it is not necessary to use a rail having a large cross-sectional area or to shorten the bracket interval, so that the bending strength of the rail against a horizontal load can be ensured without increasing the cost of the rail and the rail support member.

Embodiment 2. FIG.
The second embodiment will be described below with reference to the drawings.
An example of the rail support structure of the second embodiment is shown in FIG. In the figure, the shape of the steel plate forming rail 10 is different from that in FIG. 1 and is a shape in which a surface folded in the X-axis direction of the steel plate forming rail is added at the rail flange end (the outer peripheral end portion with respect to the shape center portion of the rail flange portion). (This folded surface portion is hereinafter referred to as a folded portion). The rail clip 3 is installed in the YZ plane in FIG. 1, whereas in FIG. 4, it is installed in the XZ plane.

  Next, the configuration of the bracket 2 will be described with reference to FIG. The bracket 2 is composed of a pair of groove-shaped members, and the steel plate shown in FIG. 17 is bent into a groove shape. The said folding | returning part provided in the rail flange end of the steel plate forming rail 10 surface-contacts with the groove bottom face (E part shown with the oblique line of FIG. 17) of the bracket 2 (F part in FIG. 6).

  Next, the detail of a fastening part is shown in FIG. The folded portion at the end of the rail flange of the steel plate forming rail 10 is fixed by a rail clip 3 fastened to the groove bottom surface of the bracket 2 with bolts 4 and is in surface contact with the groove bottom surface of the bracket 2. Moreover, the flange back surface of the steel plate forming rail 10 is in contact with the groove-shaped cross section of the bracket 2.

  When the steel plate forming rail 10 is deformed by receiving a horizontal load in the Y direction, the folded portion of the end of the rail flange and the groove bottom surface of the bracket 2 are in surface contact with each other, and the movement is restricted. , Rotation around the X axis is suppressed. Thereby, the bending strength of a rail is securable without using a rail with a large cross-sectional area, or changing the vertical space | interval of a bracket.

Embodiment 3 FIG.
The third embodiment will be described below with reference to the drawings.
A rail support structure of the present embodiment is shown in FIG. The shape of the steel plate forming rail 10 is different from that of FIG. 4, and the folded portion is folded 90 degrees to the opposite side of the rail head at the end of the rail flange (G portion indicated by hatching in the figure). The rail clip 3 is installed in the XZ plane as in FIG.

  Next, the configuration of the bracket 2 will be described below with reference to FIG. The bracket 2 is composed of a pair of groove-shaped members, as in FIG. 5, and the folded portion provided at the flange end of the steel plate forming rail 10 is in surface contact with the groove bottom surface of the bracket 2.

  Moreover, the detail of a fastening part is shown in FIG. The folded portion at the flange end of the steel plate forming rail 10 is fixed with a rail clip 3 fastened to the groove bottom surface of the bracket 2 with bolts 4 and is in surface contact with the groove bottom surface of the bracket 2. Moreover, the flange back surface of the steel plate forming rail 10 is in contact with the groove-shaped cross section of the bracket 2.

  The rail clip 3 in this figure is configured in an L shape that is different from the rail clip in FIG. 6, and is installed facing two surfaces of the rail flange portion (the flange back surface and the folded portion). Due to the L-shaped shape of the rail clip, the steel plate forming rail can be displaced in the X-axis direction (same as the rail head direction) and can be prevented from moving away from the bracket 2.

  Further, when the steel plate forming rail 10 is deformed by receiving a horizontal load in the Y direction, the movement between the folded portion at the end of the rail flange and the groove bottom surface of the bracket 2 is restrained by surface contact, which is a rail support point. In the bracket 2, rotation around the X axis is suppressed. Thereby, the bending strength of a rail is securable without using a rail with a large cross-sectional area, or changing the vertical space | interval of a bracket.

  In contrast to the bracket configuration shown in FIG. 5, the bracket 2 of this configuration has a simple groove shape, and can be formed by bending a general-purpose groove steel or a simple plate. Therefore, the cost of the rail support structure can be suppressed.

  The bracket structure is not limited to the groove shape shown in FIG. 8, but a pair of angle members (L-shaped members) shown in FIG. 10, a single groove member shown in FIG. 11, and FIG. It may be a square pipe material. These bracket shapes are configured so that the L-shaped member (FIG. 13), which is a conventional bracket shape, receives torsion around the X axis only by the plate in the XY plane, but also receives torsion in the XZ plane. Therefore, the torsional rigidity of the bracket with respect to the rotation around the X axis is increased. Therefore, the effect of suppressing rail horizontal deformation in the Y-axis direction is further enhanced. Therefore, the rail bending strength with respect to the horizontal load can be further improved.

In addition, since the folded portion provided at the end of the rail flange (G portion indicated by the hatching in FIG. 7) is provided on the opposite side to the rail head, the rail moment of inertia about the Y axis is in the rail cross section of FIG. Compared to larger. Therefore, the rail bending strength with respect to the load in the X-axis direction can be further increased even with the same rail weight.

Embodiment 4 FIG.
The fourth embodiment will be described below with reference to the drawings.
A rail support structure of the present embodiment is shown in FIG. The shapes of the steel plate forming rail 10 and the rail clip 3 are the same as in FIG. 1, but the configuration of the bracket 2 is different. The bracket 2 is generally U-shaped, whereas FIG. 1 is L-shaped.

  The configuration of the bracket 2 will be described below with reference to FIG. The bracket 2 is configured by bending a single steel plate, and the central portion of the bracket is bent into a convex shape corresponding to the U-shaped hollow portion of the steel plate forming rail 10 and is integrally formed. .

  Details of the fastening portion are shown in FIG. The convex bent portion at the center of the bracket is inserted so as to be in close contact with the U-shaped hollow portion of the steel sheet forming rail 10. Further, the steel plate forming rail 10 is fixed by a rail clip 3 fastened to the bracket 2 by a bolt 4.

  When the steel plate forming rail 10 is deformed by receiving a horizontal load in the Y-axis direction, the convex bent portion at the center of the bracket comes into surface contact with the inner surface of the steel plate forming rail, and the movement is restricted. The effect is obtained. Furthermore, since the bracket 2 is formed by bending a single steel plate, the steps such as welding and bolt fastening for fixing the convex portion 2a shown in the first embodiment to the bracket are unnecessary, and the cost is low. It can be a bracket configuration.

Embodiment 5 FIG.
The structure of the bracket 2 of this Embodiment is demonstrated using FIG. The shapes of the steel plate forming rail 10 and the rail clip 3 are the same as those in FIG. The schematic shape of the bracket 2 is the same as that of FIG. 19 which is the configuration of the fourth embodiment. However, while FIG. 19 comprises the bracket 2 with a single steel plate, in this embodiment, as shown in FIG. 22, the two steel plates 2b and 2c are arranged in a state of being face-symmetrical. Each steel plate 2b, 2c is bent into a Z shape.

  Details of the fastening portion are shown in FIG. The surfaces of the brackets 2b and 2c facing each other in a symmetrical plane are inserted so as to be in close contact with the U-shaped hollow portion of the steel sheet forming rail 10. That is, a part of each of the brackets 2b and 2c is a convex portion that is in close contact with the U-shaped hollow portion of the steel sheet forming rail 10 in a state of being opposed to each other on the symmetry plane. The two brackets 2b and 2c are arranged so as to be in surface contact with each other, but the bracket 2 may be configured by providing a gap.

  When the steel plate forming rail 10 is deformed by receiving a horizontal load in the Y-axis direction, the brackets 2b and 2c inserted into the U-shaped hollow portion of the steel plate forming rail 10 are in surface contact with the inner surface of the steel plate forming rail. Therefore, the same effect as in the fourth embodiment can be obtained. In addition, the brackets 2b and 2c have a simpler bending configuration than the bracket shape shown in the fourth embodiment, and are further symmetrical with respect to the plane, so that the number of parts is not increased and the number of parts is not increased. It can be an inexpensive bracket.

Embodiment 6 FIG.
The sixth embodiment will be described below with reference to the drawings.
A rail support structure of the present embodiment is shown in FIG. The shapes of the steel plate forming rail 10 and the rail clip 3 are the same as those in FIG. The bracket 2 has a substantially L-shaped configuration as in FIG.

  Next, the configuration of the bracket 2 will be described below with reference to FIG. The bracket 2 is composed of two steel plates 2d and 2e as in the fifth embodiment, but the folding direction and the folding location are different. The brackets 2d and 2e are formed by bending a steel plate shown in FIG. H portions indicated by diagonal lines in the figure are arranged so as to face each other.

  Details of the fastening portion are shown in FIG. 26 is inserted so as to be in close contact with the U-shaped hollow portion of the steel sheet forming rail 10. That is, a part (H portion) of each of the brackets 2d and 2e is a convex portion that is in close contact with the U-shaped hollow portion of the steel sheet forming rail 10 in a state of facing each other on the symmetry plane. Moreover, the height (length in the Z-axis direction) of the H part of the brackets 2d and 2e inserted in the U-shaped hollow part of the steel sheet forming rail 10 is the same as that of the brackets 2d and 2e not inserted in the hollow part. It is higher (longer) than the height of other parts (length in the Z-axis direction). Note that in the brackets 2d and 2e, the H portions indicated by hatching in FIG. 24 may be in surface contact with each other or may be installed apart.

  When the steel plate forming rail 10 is deformed by receiving a horizontal load in the Y direction, the brackets 2d and 2e inserted into the U-shaped hollow portion of the steel plate forming rail 10 are in surface contact with the inner surface of the steel plate forming rail. Since the movement is restricted, the same effect as in the fourth embodiment can be obtained. Moreover, since this structure is the same general L shape as the conventional bracket, a bracket can be fixed by the same method as the conventional, and installation is easy. Furthermore, since the height of the plate inserted into the central portion of the steel plate forming rail is longer than those in Embodiments 4 and 5, the effect of suppressing the rotation of the rail around the X axis is further enhanced.

  1 rail, 2 bracket, 3 rail clip, 4 bolt, 10 steel plate forming rail.

Claims (6)

  In an elevator rail support structure having a steel plate forming rail including a U-shaped forming portion and a bracket for supporting the steel plate forming rail, one surface constituting the steel plate forming rail and one surface of the bracket are The support of the elevator rail, wherein the surfaces are set in surface contact with each other within the plane determined by the head direction of the steel plate forming rail and the rail axial direction of the steel plate forming rail Construction.   The elevator rail support structure according to claim 1, wherein the convex portion of the bracket is in close contact with a hollow portion of a U-shaped formed portion of the steel plate forming rail.   2. The elevator rail according to claim 1, wherein the surface of the bracket that is in surface contact with the steel sheet forming rail is configured to be in surface contact with a folded portion provided at a rail flange end of the steel sheet forming rail. Support structure.   The elevator according to claim 3, wherein the bracket is configured by a groove shape, and the folded portion of the steel plate forming rail is fixed to the bracket by a rail clip so as to be in surface contact with a groove bottom surface of the bracket. Rail support structure.   4. A rail clip for fixing the steel sheet forming rail and the flange is formed in an L shape, and is installed to face two surfaces of the rail flange portion including a folded portion of the steel sheet forming rail. Or the support structure of the elevator rail of Claim 4.   The elevator rail support structure according to claim 2, wherein the convex portion of the bracket is configured by bending a plate.

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