EP1857399A1 - Guide rail for elevator - Google Patents
Guide rail for elevator Download PDFInfo
- Publication number
- EP1857399A1 EP1857399A1 EP05720229A EP05720229A EP1857399A1 EP 1857399 A1 EP1857399 A1 EP 1857399A1 EP 05720229 A EP05720229 A EP 05720229A EP 05720229 A EP05720229 A EP 05720229A EP 1857399 A1 EP1857399 A1 EP 1857399A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rail
- base portion
- guide
- elevator
- guide rail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/02—Guideways; Guides
- B66B7/022—Guideways; Guides with a special shape
Definitions
- the present invention relates to elevator guide rails for guiding within an elevator hoistway up-and-down movement of the elevator car as well as the elevator counterweight.
- An elevator is so configured that an elevator car and its counterweight suspended via the main rope within a hoistway vertically travel in a jig-back way.
- the elevator car and the counterweight are guided by guide rails.
- the guide rails are laid across the vertical travel paths via rail supporting members at a predetermined spacing on inside walls of the hoistway.
- a conventional guide rail a T-shaped rail defined in ISO standard or Japan Elevator Association Standard is used, which is formed in an approximate T-shape in which a rail portion rises from a platelike base portion.
- the base portion is mounted on the rail supporting members, and the elevator car and the counterweight are guided on the rail portion. (e.g., see Patent Document 1).
- Patent Document 1 Japanese Laid-open Patent Publication 238045/2003 (Pages 3 and 4, and Figs. 1 and 2)
- a guide rail which guides an elevator car and a counterweight as described above, is subject to load from the elevator car or the counterweight by an earthquake or emergency stop. Therefore, the strength against the load is required.
- the guide rails are laid across the vertical travel paths, the longer the vertical travel paths, the more a required amount of guide rail per elevator car.
- the guide rail size also increases. For those reasons, for an elevator, guide rails in which the required amount of material is decreased while ensuring a desired strength, in other words, guide rails that require a small amount of material with respect to the strength are desired.
- the present invention has been made to resolve such problems, and aims to achieve guide rails in which a required amount of material is decreased while ensuring a desired strength, in other words, guide rails that require a small amount of material with respect to the strength.
- An elevator guide rail relevant to the present invention is formed in an approximate T-shape composed of a platelike base portion and a rail portion rising therefrom, and formed so that the rail portion is engaged with a guide unit to guide up-and-down movement of an elevator car or its counterweight, and a recess is formed in the midportion of the bottom side of the base portion.
- 1 guide rail; 2: base portion; 2a: sloping surface; 2b: arc-section recess; 2c: rectangular-section recess; 3: rail portion; 3a: rail head portion; 3b: rail neck portion; 4: elevator car; 5: guide units; 6: rail brackets; 7: rail clips; 8: bolts; 9: screw nuts; 10: guide rollers
- Fig. 1 through Fig. 3 are diagrams illustrating Embodiment 1 of the present invention.
- Fig. 1 is a cross-sectional view of a guide rail in the present embodiment
- Fig. 2 illustrates an example in which the guide rails are applied to an elevator
- Fig. 3 is a diagram comparing the guide rail in the present embodiment with a conventional guide rail
- Fig. 4 is a diagram illustrating a state in which the guide rail in the present embodiment is used.
- the guide rail 1 is configured such that a rail portion 3 is formed upright from a platelike base portion 2, to exhibit an approximate T-shapo.
- Sloping surfaces 2a are formed on the top face of the base portion 2, and an arc-section recess 2b is formed in the midportion of the bottom side.
- a flat portion of the bottom side of the base portion is fixed to unillustrated rail brackets, and the rail brackets are fixed to inside walls of the hoistway at a predetermined spacing, whereby the guide rails 1 are laid along the hoistway.
- the rail portion 3 includes a.rail head portion 3a for engaging with an unillustrated guide unit, and the rail head portion 3a is connected to the base portion via a rail neck portion 3b that is slimmer than the rail head width. There portions are integrally formed, to constitute the guide rail 1.
- Fig. 2 illustrates an example in which the guide rails 1 are applied to an elevator.
- Fig. 2 (a) illustrates a top view, and (b) illustrates a front view.
- the guide units 5 are attached to four corners of the elevator car 4.
- the guide units 5 are engaged with the guide rails 1, and guide to the guide rails 1 the elevator car 4 for traveling vertically.
- the guide rails 1 are fixed at a predetermined spacing via rail brackets 6 on the inside walls of the hoistway.
- the seismic force thereof acts on the guide rails 1 via the guide units 5 as a force Fx in the apical direction of the rail head portion 3a and a force Fy in the lateral-side direction thereof.
- the guide rails 1 are subject to bending moments by two-directional forces Fx and Fy due to an earthquake between the fixed points thereof, so that the guide rails require a desired strength against the bending moments.
- FIG. 3 illustrates comparison with a conventional ISO-standard T-shaped rail, for example.
- the guide rail 1 according to the present embodiment is formed so that a recess 2b is formed in the midportion of the bottom side of the base portion 2, and the recessed portion in the midportion of the bottom side of the base portion 2 is redistributed to both edges of the base portion 2 and to the top of the rail head portion 3a so that the figure center A of the cross section is approximately the same position.
- the guide rail is formed so that the height H1 of the edge faces of the base portion 2 and the gradient angle of the sloping surface 2a of the base portion 2 are the same as those of the ISO-standard T-shaped rail, and the width B of the rail head portion 3a and the height H2 of the rail head portion 3a are the same as those of the ISO-standard T-shaped rail.
- the guide rail 1 has the same sectional area as the conventional ISO-standard T-shaped rail, by forming the recess 2b in the midportion of the base portion 2, the occupied area nearer to the figure center A of the cross section is decreased, and the recessed portion is redistributed to portions distant from the figure center A of the cross section (to both edges of the base portion 2 and the top of the rail head portion 3a), whereby the geometrical moment of inertia can be increased, and the section modulus can be increased as well. Accordingly, using the same required amount of material as the conventional ISO-standard T-shaped rail, the strength against bending moments in two directions (horizontal and vertical directions in Fig. 3) can be increased.
- FIG. 4 illustrates the example of use.
- Rail clips 7 are fixed to a rail bracket 10 by the sloping surface 2a of the base portion 2 being fastened with bolts 8 and screw nuts 9, whereby the guide rail 1 is fixed to the rail bracket 10.
- guide rollers 11 serving as a guide unit are engaged with both the side faces and the edge of the rail head portion 3a.
- the guide rollers guide up-and-down movement of an unillustrated elevator car or counterweight equipped with a guide unit.
- the guide rail 1 is the same as a conventional ISO-standard T-shaped rail in the height of the edge faces of the base portion 2, the gradient angle of the sloping surface 2a of the base portion 2, the width of the rail head portion 3a, and the height of the rail head portion 3a. Therefore, regarding the rail clips 7 for fixing the guide rail 1 and the guide rollers 10 serving as a guide unit, existing conventional parts can be used. Accordingly, without using new parts, the guide rail 1 of high strength, for which a required amount of material is small, can be applied to an elevator, which is economical.
- an arc-section recess 2b is formed in the midportion of the base portion 2, it is not so limited.
- a rectangular-section recess 2c can be formed in the midportion of the base portion 2 as in Fig. 5.
- an arc-section recess is more effective, because the smaller the area of components close to the figure center of the cross section and the larger the area of components distant from the figure center, the greater the geometrical moment of inertia with the same required amount of material.
- an elevator guide rail 1 relevant to the present invention is suitable to be used for apparatuses guiding up-and-down movement of an elevator car or its counterweight along a hoistway.
Landscapes
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
It is an object to obtain an elevator guide rail for which a required amount of material is decreased while ensuring a desired strength, in other words, an elevator guide rail that requires a small amount of material with respect to the strength.
In order to achieve the object, a guide rail is formed in an approximate T-shape, configured with a platelike base portion and a rail portion rising therefrom, and formed so that the rail portion is engaged with a guide unit to guide up-and-down movement of an elevator car or its counterweight, a recess is formed in the midportion of the bottom side of the base portion, and the cross-sectional area of the recessed portion is redistributed to both edges of the base portion and the top of the rail portion.
Description
- The present invention relates to elevator guide rails for guiding within an elevator hoistway up-and-down movement of the elevator car as well as the elevator counterweight.
- An elevator is so configured that an elevator car and its counterweight suspended via the main rope within a hoistway vertically travel in a jig-back way. The elevator car and the counterweight are guided by guide rails. The guide rails are laid across the vertical travel paths via rail supporting members at a predetermined spacing on inside walls of the hoistway. As a conventional guide rail, a T-shaped rail defined in ISO standard or Japan Elevator Association Standard is used, which is formed in an approximate T-shape in which a rail portion rises from a platelike base portion. The base portion is mounted on the rail supporting members, and the elevator car and the counterweight are guided on the rail portion. (e.g., see Patent Document 1).
- Patent Document 1: Japanese Laid-open Patent Publication
238045/2003 Pages - A guide rail, which guides an elevator car and a counterweight as described above, is subject to load from the elevator car or the counterweight by an earthquake or emergency stop. Therefore, the strength against the load is required. In addition, because the guide rails are laid across the vertical travel paths, the longer the vertical travel paths, the more a required amount of guide rail per elevator car. Moreover, as the capacity of the elevator car increases, the guide rail size also increases. For those reasons, for an elevator, guide rails in which the required amount of material is decreased while ensuring a desired strength, in other words, guide rails that require a small amount of material with respect to the strength are desired.
- The present invention has been made to resolve such problems, and aims to achieve guide rails in which a required amount of material is decreased while ensuring a desired strength, in other words, guide rails that require a small amount of material with respect to the strength.
- An elevator guide rail relevant to the present invention is formed in an approximate T-shape composed of a platelike base portion and a rail portion rising therefrom, and formed so that the rail portion is engaged with a guide unit to guide up-and-down movement of an elevator car or its counterweight, and a recess is formed in the midportion of the bottom side of the base portion.
- According to the present invention, by redistributing from a recessed portion in the midportion of the bottom side of the base portion to both edges of the base portion and ,the top of the rail portion, elevator guide rails in which the strength is increased while controlling the required amount of material can be obtained.
-
- [Fig. 1] Fig. 1 is a diagram illustrating a cross-sectional view of a guide rail in
Embodiment 1 of the present invention. - [Fig. 2] Fig. 2 is a diagram illustrating an example in which the guide rails in
Embodiment 1 are applied to an elevator. - [Fig. 3] Fig. 3 is a diagram illustrating comparison of the guide rail in
Embodiment 1 with a conventional guide rail. - [Fig. 4] Fig. 4 is a diagram illustrating a state in which the guide rail in
Embodiment 1 is used. - [Fig. 5] Fig. 5 is a diagram illustrating a guide rail in another embodiment of the present invention.
- 1: guide rail; 2: base portion; 2a: sloping surface; 2b: arc-section recess; 2c: rectangular-section recess; 3: rail portion; 3a: rail head portion; 3b: rail neck portion; 4: elevator car; 5: guide units; 6: rail brackets; 7: rail clips; 8: bolts; 9: screw nuts; 10: guide rollers
- Hereinafter, a preferred embodiment of the present invention will be described in reference to the drawings.
- Fig. 1 through Fig. 3 are
diagrams illustrating Embodiment 1 of the present invention. Fig. 1 is a cross-sectional view of a guide rail in the present embodiment; Fig. 2 illustrates an example in which the guide rails are applied to an elevator; Fig. 3 is a diagram comparing the guide rail in the present embodiment with a conventional guide rail; and Fig. 4 is a diagram illustrating a state in which the guide rail in the present embodiment is used. In Fig. 1, theguide rail 1 is configured such that arail portion 3 is formed upright from aplatelike base portion 2, to exhibit an approximate T-shapo. Sloping surfaces 2a are formed on the top face of thebase portion 2, and an arc-section recess 2b is formed in the midportion of the bottom side. A flat portion of the bottom side of the base portion is fixed to unillustrated rail brackets, and the rail brackets are fixed to inside walls of the hoistway at a predetermined spacing, whereby theguide rails 1 are laid along the hoistway. Therail portion 3 includes a.rail head portion 3a for engaging with an unillustrated guide unit, and the rail head portion 3a is connected to the base portion via a rail neck portion 3b that is slimmer than the rail head width. There portions are integrally formed, to constitute theguide rail 1. - Here, the load applied to the
guide rail 1 will be described: Fig. 2 illustrates an example in which theguide rails 1 are applied to an elevator. Fig. 2 (a) illustrates a top view, and (b) illustrates a front view. Theguide units 5 are attached to four corners of theelevator car 4. Theguide units 5 are engaged with theguide rails 1, and guide to theguide rails 1 theelevator car 4 for traveling vertically. Theguide rails 1 are fixed at a predetermined spacing viarail brackets 6 on the inside walls of the hoistway. - If an earthquake or the like occurs while the
elevator car 4 is between fixed points of theguide rails 1, or between fixed points of therail brackets 6, the seismic force thereof acts on theguide rails 1 via theguide units 5 as a force Fx in the apical direction of the rail head portion 3a and a force Fy in the lateral-side direction thereof. Thus, theguide rails 1 are subject to bending moments by two-directional forces Fx and Fy due to an earthquake between the fixed points thereof, so that the guide rails require a desired strength against the bending moments. - Next, comparison of the
guide rail 1 according to the present embodiment with a conventional guide rail will be described. Fig. 3 illustrates comparison with a conventional ISO-standard T-shaped rail, for example. Compared with the conventional ISO-standard T-shaped rail, theguide rail 1 according to the present embodiment is formed so that a recess 2b is formed in the midportion of the bottom side of thebase portion 2, and the recessed portion in the midportion of the bottom side of thebase portion 2 is redistributed to both edges of thebase portion 2 and to the top of the rail head portion 3a so that the figure center A of the cross section is approximately the same position. In addition, the guide rail is formed so that the height H1 of the edge faces of thebase portion 2 and the gradient angle of the sloping surface 2a of thebase portion 2 are the same as those of the ISO-standard T-shaped rail, and the width B of the rail head portion 3a and the height H2 of the rail head portion 3a are the same as those of the ISO-standard T-shaped rail. - As described above; while the
guide rail 1 according to the present embodiment has the same sectional area as the conventional ISO-standard T-shaped rail, by forming the recess 2b in the midportion of thebase portion 2, the occupied area nearer to the figure center A of the cross section is decreased, and the recessed portion is redistributed to portions distant from the figure center A of the cross section (to both edges of thebase portion 2 and the top of the rail head portion 3a), whereby the geometrical moment of inertia can be increased, and the section modulus can be increased as well. Accordingly, using the same required amount of material as the conventional ISO-standard T-shaped rail, the strength against bending moments in two directions (horizontal and vertical directions in Fig. 3) can be increased. - In addition, to the contrary, when a guide rail is formed so that the midportion of the bottom side of the
base portion 2 is formed in a recessed form as described above so as to have the same geometrical moment of inertia as the conventional ISO-standard T-shaped rail, the cross-sectional area can be decreased, and the required amount of material can be reduced. - Next, an example in which the
guide rail 1 according to the present embodiment is used will be described. Fig. 4 illustrates the example of use.Rail clips 7 are fixed to arail bracket 10 by the sloping surface 2a of thebase portion 2 being fastened withbolts 8 andscrew nuts 9, whereby theguide rail 1 is fixed to therail bracket 10. Then, guide rollers 11 serving as a guide unit are engaged with both the side faces and the edge of the rail head portion 3a. The guide rollers guide up-and-down movement of an unillustrated elevator car or counterweight equipped with a guide unit. - As described above, the
guide rail 1 is the same as a conventional ISO-standard T-shaped rail in the height of the edge faces of thebase portion 2, the gradient angle of the sloping surface 2a of thebase portion 2, the width of the rail head portion 3a, and the height of the rail head portion 3a. Therefore, regarding therail clips 7 for fixing theguide rail 1 and theguide rollers 10 serving as a guide unit, existing conventional parts can be used. Accordingly, without using new parts, theguide rail 1 of high strength, for which a required amount of material is small, can be applied to an elevator, which is economical. - It should be noted that, although in the present embodiment an arc-section recess 2b is formed in the midportion of the
base portion 2, it is not so limited. For example, a rectangular-section recess 2c can be formed in the midportion of thebase portion 2 as in Fig. 5. However, an arc-section recess is more effective, because the smaller the area of components close to the figure center of the cross section and the larger the area of components distant from the figure center, the greater the geometrical moment of inertia with the same required amount of material. - As described above, an
elevator guide rail 1 relevant to the present invention is suitable to be used for apparatuses guiding up-and-down movement of an elevator car or its counterweight along a hoistway.
Claims (3)
- An elevator guide rail formed in an approximate T-shape, comprising a platelike base portion and a rail portion rising therefrom, the rail portion being engaged with a guide unit to guide up-and-down movement of an elevator car or counterweight, and the midportion of the bottom side of the base portion being recessed.
- An elevator guide rail according to claim 1, characterized in that the recess in the midportion of the bottom side of the base portion is formed to have an arc contour.
- An elevator guide rail according to claim 1 or claim 2, characterized in that
the elevator guide rail exhibits a form which is that of the ISO or Japan Elevator Association standard for T-shaped rails;
the width of the rail portion where it engages with the guide unit, the height of both edge faces of the base portion, and the gradient angle of sloping surfaces formed from both edges of the base portion toward the rail portion are identical with the standard; and
the cross-sectional area of the recessed portion in the midportion of the bottom side of the base portion is redistributed to the top of the rail portion and both the edges of the base portion.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/003957 WO2006095413A1 (en) | 2005-03-08 | 2005-03-08 | Guide rail for elevator |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1857399A1 true EP1857399A1 (en) | 2007-11-21 |
Family
ID=36953024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05720229A Withdrawn EP1857399A1 (en) | 2005-03-08 | 2005-03-08 | Guide rail for elevator |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1857399A1 (en) |
JP (1) | JPWO2006095413A1 (en) |
CN (1) | CN101031493A (en) |
WO (1) | WO2006095413A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20111190A1 (en) * | 2011-06-29 | 2012-12-30 | Monteferro S P A | GUIDE FOR LIFTS, LIFTS AND SIMILARS, AS WELL AS METHOD TO CARRY OUT THAT GUIDE |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2330296B1 (en) * | 2008-06-06 | 2010-09-22 | S.A. De Vera (Savera) | ELEVATOR GUIDE. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52147364U (en) * | 1976-05-04 | 1977-11-08 | ||
JPS61216831A (en) * | 1985-03-20 | 1986-09-26 | Hitachi Ltd | Production of long sized shape steel |
JPH0218279A (en) * | 1988-07-06 | 1990-01-22 | Mitsubishi Electric Corp | Guide rail fixing device for elevator |
-
2005
- 2005-03-08 EP EP05720229A patent/EP1857399A1/en not_active Withdrawn
- 2005-03-08 JP JP2007506946A patent/JPWO2006095413A1/en active Pending
- 2005-03-08 CN CNA2005800160692A patent/CN101031493A/en active Pending
- 2005-03-08 WO PCT/JP2005/003957 patent/WO2006095413A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2006095413A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20111190A1 (en) * | 2011-06-29 | 2012-12-30 | Monteferro S P A | GUIDE FOR LIFTS, LIFTS AND SIMILARS, AS WELL AS METHOD TO CARRY OUT THAT GUIDE |
WO2013001460A1 (en) * | 2011-06-29 | 2013-01-03 | Monteferro S.P.A. | Guide for elevators, lifts and the like, and method for manufacturing said guide |
RU2600554C2 (en) * | 2011-06-29 | 2016-10-20 | Монтеферро С.П.А. | Guide for elevators or lifts and method for manufacturing said guide |
Also Published As
Publication number | Publication date |
---|---|
CN101031493A (en) | 2007-09-05 |
WO2006095413A1 (en) | 2006-09-14 |
JPWO2006095413A1 (en) | 2008-08-14 |
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