CA1039255A - Joint for monobeam rail - Google Patents
Joint for monobeam railInfo
- Publication number
- CA1039255A CA1039255A CA219,494A CA219494A CA1039255A CA 1039255 A CA1039255 A CA 1039255A CA 219494 A CA219494 A CA 219494A CA 1039255 A CA1039255 A CA 1039255A
- Authority
- CA
- Canada
- Prior art keywords
- wedges
- rail
- joint
- camming
- pair
- 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.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B11/00—Rail joints
- E01B11/02—Dismountable rail joints
- E01B11/20—Dismountable rail joints with gap-bridging
- E01B11/32—Dismountable rail joints with gap-bridging by separate parts, Inserts bridging both rail heads
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/08—Tracks for mono-rails with centre of gravity of vehicle above the load-bearing rail
- E01B25/10—Mono-rails; Auxiliary balancing rails; Supports or connections for rails
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
- Prostheses (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The ends of two rail sections of a monobeam rail are formed with inwardly directed 45° cutout surfaces.
Wedges engaging against the ends of these rails at these surfaces are urged apart by an actuating means so as to remain snugly in contact with these surfaces and thereby form a smooth running surfaces on the top of the rail. The wedges have the outline of a right isosceles triangle with the hypotenuse extending parallel to the rail. The means for urging them, apart may comprise a simple spring, a can arrangement, or camming surfaces on the two rails that act against the backs of chevron-shaped wedges.
The ends of two rail sections of a monobeam rail are formed with inwardly directed 45° cutout surfaces.
Wedges engaging against the ends of these rails at these surfaces are urged apart by an actuating means so as to remain snugly in contact with these surfaces and thereby form a smooth running surfaces on the top of the rail. The wedges have the outline of a right isosceles triangle with the hypotenuse extending parallel to the rail. The means for urging them, apart may comprise a simple spring, a can arrangement, or camming surfaces on the two rails that act against the backs of chevron-shaped wedges.
Description
` ~
1(1~9~
SPECIFICATION ,:` :
~. _ ....
Field of the Invention ~, . .
The pre~ent invention relates to a rail a~3sembly. More '; ~
par~icularly this i~ventivn concern~ a ~oint for a monobeam . ~: :
ra~
.
Back round of the Invent~on Track ~ointæ or a monobeam rail assembly, such as i8 u~ed .~ ;~
for a monorail, must be able to compensate for con~iderable rail-section elongation due to temperature changcs. The truck or bogie riding on this monob~am rail must nonetheles~ hav~ a contlnuous rolllng surface from one rall sec~ion to the other.
It has be~n 6uggested to provide an expa~sion-type Joint com~
prising a pair of plates each carried on a respective ra~l ~ection a~d each formed with a longitudinally ~xtending 8Qt of fi~gers , lylng at the upper or rolling surface of the rail. The fingers .
on one ~ection mesh with those o~ th~ other and one of the sets o ~ingers i8 hinged on the respective rail section 90 that a considerable amount of displacement of one rail section longi- ;
tudinally relative to the other is possible. This arrangemQnt h2s the disadvantage ~hat it is vertically rathex thick b~au~e th~ relatively thin fingers must be strong enough to support the weight of the veh~cle suspended from the rail. This vertical thickne~ considerably disadvantageous wben rail sQctions . , : : ; : . ~ .
,. . ~ ,. . .
s~ ` :
are being used which have running or gui cle ~urface8 that extend horizontally beyond the main c~ntral port~on of the rail, with the wheels of th~ bogie riding on this laterally extending section. Al~o ~uch an arrangement can frequently not compeD~ate for certain ki~d of movement~ of the rail section relative to the ot~er so th~t the fingers are pried apart, with those ~hat are hing&d on the respective end section stand~ng up.
Ob,~c~s ~f ~he Invention It i8 therefore an obJect of the present invention to provide an improved rail arrangement.
Yet another ob~ect i8 the provislon o an improved ~oint for a monobeam rail having a pair of rail section~ with ad~acent ends.
Yet another ob~ect is the provision of such an a~sembly which is relatively simple, but which nonetheless provides a good running surface on the ralls and which ~s able to compensate for reLativ~ly gr~at thermal expansion or ~on-traction. :~
Summary of the Invention ::' These ob~ects are attained according to the pre~ent ln- ;
vention in a ~oint of the above-dQscr~bed general type com- ;
prising a pair o~ gen~rally inwardly facing camming Stlr~aCQ5 i~cl~ned to the longitudinal direction of the rail on the ~ 1.03S~2S5 ends of the rail sections. A pair of outwardly dis~
plac~abla double wedges lying generally at the upper side of the rail each havs a pair of camming face~ which are in flat engagement with the respec~iv0 surface of the respectiYe rail end. Means i3 provided for displacing the wedges apart or~hogonally to the longi~udinal dir~ction of the rail and displacement of the ends away from each other and vice versa for maintaining the wedge faces tlghtly in engagement with the camming surfaces of the rail.
In accordance with th2 pr2sent invention the double wedges bridge th0 ends between the rail sections ~nd are made o~ steel plate lying at the upper side or surface of the rail. ~he camming surfaces are formsd in ~he ends ,. .
of the ra~l and the camming ~aces on the double wedges are - complementarily shaped. Thus the bridging elements or double wedges always completely fill the gap between the ends of the two rail sections and insure that a continuous runnlng surface i8 present.
Ac¢ording to yet another feature of this in-vention a thin metal plste overlies the entire ~oint assembly and is secured to only one of the rail 9eetions S0 a8 to ~nsure a smooth running surfacs. This plate i8 in it~elf not strong enough to support a load above the ~oint, but 1~39~5S
only can support such a load i it lie~ flat abov~ the ~trong and rigid double wedges. ~:
According to yet anothar feature of Ithis inven~ion t~e .
wedges are each formed a~ right Isocele~ triangle~ having .
hypotenuses or bages ~hat extend in line with ths lo~gi~
tud~nal axi3 of ~he rail and sides w~ich, therefor~9 lia at an angle of 45 thereto and engage ~latly again~t the camming surfaces formed in the rail ends.
According to yet another feature of the pres~nt ln-vention the means for urging the two double wedges apart orthogonally to the longl~udinal axis or ~ection of the rail comprises a w~dge-drive arra~gement which automatically pushes these wedgefi apart as the raiL ends separate and `~
which pu~he~ the wedge3 back together as the rails come closer~ It is also possible according to thi~ invent~on to provide a cam-and-lever arrangement that similarly actuates the wedges. Furth~rmore a spring can be provided between the two wedges to urge them continuously apart with a predetermined force~
The ~oint according to the present invention i~
extxemely simple and insures that a ~turdy and smooth running surface i8 alwayB present at the top of the rail, even whsn due to thermal contraction th~ rail sections have . , .
-4- :~
;.. ., -,. ... . ;.
a;3t9255 separated considerably at their ends. The syst~m is ~ !
.-- , . . .
very simple and can be prod~ced with ~inimal expense, Furthermore ther2 are no parts which can potientally .
raise up above the upper sur~a¢Q of the rail and cau~e an accident ~or the monorail railway.
Brief De3cri~ti~n o~ the Drawing The above and other ob~ects, efltures, and advantages will become more readily apparent rom ~he followin~, re~erence being made to the accompanying drawing, in which: :
~ -FIG. 1 is a top view of a ~oin~ according to the .,~ ~ , .
pres~nt invention;
;: . ~. .
FIG lA is a vertical section through a rail s~ction according to the present invention;
FIGS, 2 and 3 are top view~ illustrating operation o~
the system of FIG. l; and FIGS. 4, 5 and 6 are top view illustrating furthar -- ~ :
arrangements according to the present inventionO ,~ ~
~;
:: :
8pecl~
A~ shown ~n PIGS, 1~3 two rail sections 2 are separa~ed ao a Joint 1 pravidad with connecting olement~ 3 ~D the form~of vertically spaced flat 5~201-plat~ double wedges 5 provided~at the ~pace 4 betwaen the ends of the rail~ 2.
' . .
: :
r 9 ~9;~5$ J
;
FIG. lA show3 how each rail sec~io~ 2 is ormed of a pair of I-beams 2a and a concrete cora 2b. The wedges : : .
5 have the g~eral shape o~ isosc~le~ r~ght triangles with their hypotenuse~ extending paralle:L to thQ longi~
tudinal axis A of the rall. Camming suriFaces 6 cut away at 45 so as to lie flatly against th~ corresponding side surface o the wedges 5 are formed in the ends of th~ rail sectionæ 2~ An arrang~m~nt between the four wedges 5 forces th~m apart transverse to the direction A 80 that they always bridge the gap 4 between the two ralls 2. A plate lO secured to one of the rail section bridges the space 9 between them~
The arrangement 7 serve3 to urge the two wedges 5 apart 80 that when the rails contract considerably, as shown in FIG. 2, they are pushed relatively far out, whereas when the rails are at maximum length and the gap 4 is reduc~d to a minimum these wedges 5 are close to the center~ -The arrang~ment shown in FIGo 4 has a chsvron~shaped wedge ~' with back wedge surfaces 5b parallel to its front - :
surfaces 5a. The two rail sections 2 are similarly form~d with wedge suraces 8 parallel to ~h~ sur~aces 6 so that as they ~eparate or approach each other the surfaces 8 ~nsure that ~h~ chevron 5' moves and r~main~ in contact with the surface~ 6. Thu8 these surfaces 8 constitute th~ displacement maans.
. . . ..
~039~S5 The displac~m2nt means in FIG~ 5 are compris~d by an arrangement of a link 11 securQd to one of the ~ec~ions 2 and a cam 7' pivot~d on the other rail section with a cam ~-follower 7a' linked to the double wedge 5. Thu~ as the -~
sections 2 separate the link 11 ro~at~s the cam 7' and the cam follower 7a' fo~ce~ the wedge out3 and vice versa.
The arrangement of FIG. 6 ~ows how a sprlng 7" con-stantly biased against the back of the wedge 5 serves to urge this tightly against the suracas 6.
0 Thu8 in accordance with the pre9ent invention a spaceless ~oint is formed betwean two rail soctions whereas all of the moments due to the rolling loading of the joint are taken up by these rail sections. Vertical movements appearing at th~ ~oint do not cau~e the double wedges 5 to form sub~tantial st~ps in the running ~ur~ace. In addition such vertical motion~ in the 3oint 1 are not di~advantageous when the wedges S are relatively thick ~nd the surfaces 6 are simllarly high.
1(1~9~
SPECIFICATION ,:` :
~. _ ....
Field of the Invention ~, . .
The pre~ent invention relates to a rail a~3sembly. More '; ~
par~icularly this i~ventivn concern~ a ~oint for a monobeam . ~: :
ra~
.
Back round of the Invent~on Track ~ointæ or a monobeam rail assembly, such as i8 u~ed .~ ;~
for a monorail, must be able to compensate for con~iderable rail-section elongation due to temperature changcs. The truck or bogie riding on this monob~am rail must nonetheles~ hav~ a contlnuous rolllng surface from one rall sec~ion to the other.
It has be~n 6uggested to provide an expa~sion-type Joint com~
prising a pair of plates each carried on a respective ra~l ~ection a~d each formed with a longitudinally ~xtending 8Qt of fi~gers , lylng at the upper or rolling surface of the rail. The fingers .
on one ~ection mesh with those o~ th~ other and one of the sets o ~ingers i8 hinged on the respective rail section 90 that a considerable amount of displacement of one rail section longi- ;
tudinally relative to the other is possible. This arrangemQnt h2s the disadvantage ~hat it is vertically rathex thick b~au~e th~ relatively thin fingers must be strong enough to support the weight of the veh~cle suspended from the rail. This vertical thickne~ considerably disadvantageous wben rail sQctions . , : : ; : . ~ .
,. . ~ ,. . .
s~ ` :
are being used which have running or gui cle ~urface8 that extend horizontally beyond the main c~ntral port~on of the rail, with the wheels of th~ bogie riding on this laterally extending section. Al~o ~uch an arrangement can frequently not compeD~ate for certain ki~d of movement~ of the rail section relative to the ot~er so th~t the fingers are pried apart, with those ~hat are hing&d on the respective end section stand~ng up.
Ob,~c~s ~f ~he Invention It i8 therefore an obJect of the present invention to provide an improved rail arrangement.
Yet another ob~ect i8 the provislon o an improved ~oint for a monobeam rail having a pair of rail section~ with ad~acent ends.
Yet another ob~ect is the provision of such an a~sembly which is relatively simple, but which nonetheless provides a good running surface on the ralls and which ~s able to compensate for reLativ~ly gr~at thermal expansion or ~on-traction. :~
Summary of the Invention ::' These ob~ects are attained according to the pre~ent ln- ;
vention in a ~oint of the above-dQscr~bed general type com- ;
prising a pair o~ gen~rally inwardly facing camming Stlr~aCQ5 i~cl~ned to the longitudinal direction of the rail on the ~ 1.03S~2S5 ends of the rail sections. A pair of outwardly dis~
plac~abla double wedges lying generally at the upper side of the rail each havs a pair of camming face~ which are in flat engagement with the respec~iv0 surface of the respectiYe rail end. Means i3 provided for displacing the wedges apart or~hogonally to the longi~udinal dir~ction of the rail and displacement of the ends away from each other and vice versa for maintaining the wedge faces tlghtly in engagement with the camming surfaces of the rail.
In accordance with th2 pr2sent invention the double wedges bridge th0 ends between the rail sections ~nd are made o~ steel plate lying at the upper side or surface of the rail. ~he camming surfaces are formsd in ~he ends ,. .
of the ra~l and the camming ~aces on the double wedges are - complementarily shaped. Thus the bridging elements or double wedges always completely fill the gap between the ends of the two rail sections and insure that a continuous runnlng surface i8 present.
Ac¢ording to yet another feature of this in-vention a thin metal plste overlies the entire ~oint assembly and is secured to only one of the rail 9eetions S0 a8 to ~nsure a smooth running surfacs. This plate i8 in it~elf not strong enough to support a load above the ~oint, but 1~39~5S
only can support such a load i it lie~ flat abov~ the ~trong and rigid double wedges. ~:
According to yet anothar feature of Ithis inven~ion t~e .
wedges are each formed a~ right Isocele~ triangle~ having .
hypotenuses or bages ~hat extend in line with ths lo~gi~
tud~nal axi3 of ~he rail and sides w~ich, therefor~9 lia at an angle of 45 thereto and engage ~latly again~t the camming surfaces formed in the rail ends.
According to yet another feature of the pres~nt ln-vention the means for urging the two double wedges apart orthogonally to the longl~udinal axis or ~ection of the rail comprises a w~dge-drive arra~gement which automatically pushes these wedgefi apart as the raiL ends separate and `~
which pu~he~ the wedge3 back together as the rails come closer~ It is also possible according to thi~ invent~on to provide a cam-and-lever arrangement that similarly actuates the wedges. Furth~rmore a spring can be provided between the two wedges to urge them continuously apart with a predetermined force~
The ~oint according to the present invention i~
extxemely simple and insures that a ~turdy and smooth running surface i8 alwayB present at the top of the rail, even whsn due to thermal contraction th~ rail sections have . , .
-4- :~
;.. ., -,. ... . ;.
a;3t9255 separated considerably at their ends. The syst~m is ~ !
.-- , . . .
very simple and can be prod~ced with ~inimal expense, Furthermore ther2 are no parts which can potientally .
raise up above the upper sur~a¢Q of the rail and cau~e an accident ~or the monorail railway.
Brief De3cri~ti~n o~ the Drawing The above and other ob~ects, efltures, and advantages will become more readily apparent rom ~he followin~, re~erence being made to the accompanying drawing, in which: :
~ -FIG. 1 is a top view of a ~oin~ according to the .,~ ~ , .
pres~nt invention;
;: . ~. .
FIG lA is a vertical section through a rail s~ction according to the present invention;
FIGS, 2 and 3 are top view~ illustrating operation o~
the system of FIG. l; and FIGS. 4, 5 and 6 are top view illustrating furthar -- ~ :
arrangements according to the present inventionO ,~ ~
~;
:: :
8pecl~
A~ shown ~n PIGS, 1~3 two rail sections 2 are separa~ed ao a Joint 1 pravidad with connecting olement~ 3 ~D the form~of vertically spaced flat 5~201-plat~ double wedges 5 provided~at the ~pace 4 betwaen the ends of the rail~ 2.
' . .
: :
r 9 ~9;~5$ J
;
FIG. lA show3 how each rail sec~io~ 2 is ormed of a pair of I-beams 2a and a concrete cora 2b. The wedges : : .
5 have the g~eral shape o~ isosc~le~ r~ght triangles with their hypotenuse~ extending paralle:L to thQ longi~
tudinal axis A of the rall. Camming suriFaces 6 cut away at 45 so as to lie flatly against th~ corresponding side surface o the wedges 5 are formed in the ends of th~ rail sectionæ 2~ An arrang~m~nt between the four wedges 5 forces th~m apart transverse to the direction A 80 that they always bridge the gap 4 between the two ralls 2. A plate lO secured to one of the rail section bridges the space 9 between them~
The arrangement 7 serve3 to urge the two wedges 5 apart 80 that when the rails contract considerably, as shown in FIG. 2, they are pushed relatively far out, whereas when the rails are at maximum length and the gap 4 is reduc~d to a minimum these wedges 5 are close to the center~ -The arrang~ment shown in FIGo 4 has a chsvron~shaped wedge ~' with back wedge surfaces 5b parallel to its front - :
surfaces 5a. The two rail sections 2 are similarly form~d with wedge suraces 8 parallel to ~h~ sur~aces 6 so that as they ~eparate or approach each other the surfaces 8 ~nsure that ~h~ chevron 5' moves and r~main~ in contact with the surface~ 6. Thu8 these surfaces 8 constitute th~ displacement maans.
. . . ..
~039~S5 The displac~m2nt means in FIG~ 5 are compris~d by an arrangement of a link 11 securQd to one of the ~ec~ions 2 and a cam 7' pivot~d on the other rail section with a cam ~-follower 7a' linked to the double wedge 5. Thu~ as the -~
sections 2 separate the link 11 ro~at~s the cam 7' and the cam follower 7a' fo~ce~ the wedge out3 and vice versa.
The arrangement of FIG. 6 ~ows how a sprlng 7" con-stantly biased against the back of the wedge 5 serves to urge this tightly against the suracas 6.
0 Thu8 in accordance with the pre9ent invention a spaceless ~oint is formed betwean two rail soctions whereas all of the moments due to the rolling loading of the joint are taken up by these rail sections. Vertical movements appearing at th~ ~oint do not cau~e the double wedges 5 to form sub~tantial st~ps in the running ~ur~ace. In addition such vertical motion~ in the 3oint 1 are not di~advantageous when the wedges S are relatively thick ~nd the surfaces 6 are simllarly high.
Claims (7)
1. A joint for a monobeam rail having a pair of mutually aligned rail sections with adjacent ends, said joint comprising:
a pair of generally inwardly facing camming surfaces inclined to the longitudinal direction of said rail on each of said ends;
a pair of outwardly displaceable double wedges lying generally at the upper side of said rail and each having a pair of camming faces each in flat engagement with the respective surface of a respective end, the camming surfaces of said wedge being mirror symmetrical with respect to a vertical plane perpendicular to said direction; and means in said plane for displacing said wedges apart orthogonally to said direction to shift said pairs away from each other for maintaining said faces tightly in engagement with said surfaces, said means in said plane including a member engaging each of said wedges and spring means bearing in opposite directions on said members.
a pair of generally inwardly facing camming surfaces inclined to the longitudinal direction of said rail on each of said ends;
a pair of outwardly displaceable double wedges lying generally at the upper side of said rail and each having a pair of camming faces each in flat engagement with the respective surface of a respective end, the camming surfaces of said wedge being mirror symmetrical with respect to a vertical plane perpendicular to said direction; and means in said plane for displacing said wedges apart orthogonally to said direction to shift said pairs away from each other for maintaining said faces tightly in engagement with said surfaces, said means in said plane including a member engaging each of said wedges and spring means bearing in opposite directions on said members.
2. The joint defined in claim 1 wherein said wedges are generally triangular.
3. The joint defined in claim 2 wherein said wedges are isosceles triangles having equal sides formed as said camming faces.
4. The joint defined in claim 3 wherein said wedges are right isosceles triangles having hypotenuses extending parallel to said direction.
5. The joint defined in claim 3 wherein said wedges are made of flat steel plate,
6. The joint defined in claim 3 wherein said means includes further camming surfaces engageable with said wedges on displacement apart of said ends.
7. The joint defined in claim 6 wherein said further surfaces are parallel to the first-mentioned camming surfaces.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742406212 DE2406212C3 (en) | 1974-02-09 | Device for the seamless connection of dictating rail joints for monorails |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1039255A true CA1039255A (en) | 1978-09-26 |
Family
ID=5906996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA219,494A Expired CA1039255A (en) | 1974-02-09 | 1975-02-06 | Joint for monobeam rail |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS50124302A (en) |
| CA (1) | CA1039255A (en) |
| CH (1) | CH577073A5 (en) |
| GB (1) | GB1501755A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6268901A (en) * | 1985-09-21 | 1987-03-30 | 木舘 隆男 | Apparatus for connecting railroad track |
| JPS6278302A (en) * | 1985-10-01 | 1987-04-10 | 木舘 隆男 | Apparatus for connecting railroad track |
| JP2706780B2 (en) * | 1988-07-28 | 1998-01-28 | 幸雄 魚住 | Rail expansion and contraction device in track structure of suspension railway |
| CN107974880B (en) * | 2017-12-06 | 2023-09-26 | 中建空列（北京）工程设计研究院有限公司 | Rail joint connection device and rail comprising same |
| CN113089385A (en) * | 2021-03-31 | 2021-07-09 | 安徽中致物流发展有限公司 | Sectional type railway guide rail using laminar plasma treatment |
-
1975
- 1975-02-04 GB GB467575A patent/GB1501755A/en not_active Expired
- 1975-02-05 JP JP1448275A patent/JPS50124302A/ja active Pending
- 1975-02-06 CA CA219,494A patent/CA1039255A/en not_active Expired
- 1975-02-07 CH CH152175A patent/CH577073A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS50124302A (en) | 1975-09-30 |
| DE2406212B2 (en) | 1976-11-04 |
| DE2406212A1 (en) | 1975-08-14 |
| GB1501755A (en) | 1978-02-22 |
| CH577073A5 (en) | 1976-06-30 |
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