US3744075A - Disengageable connection for drawbridge girders - Google Patents

Disengageable connection for drawbridge girders Download PDF

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Publication number
US3744075A
US3744075A US00135220A US3744075DA US3744075A US 3744075 A US3744075 A US 3744075A US 00135220 A US00135220 A US 00135220A US 3744075D A US3744075D A US 3744075DA US 3744075 A US3744075 A US 3744075A
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United States
Prior art keywords
locking member
locking
installation according
parts
feeler
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 - Lifetime
Application number
US00135220A
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English (en)
Inventor
D Zaremba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19702018476 external-priority patent/DE2018476C3/de
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Application granted granted Critical
Publication of US3744075A publication Critical patent/US3744075A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D15/00—Movable or portable bridges; Floating bridges
    • E01D15/06—Bascule bridges; Roller bascule bridges, e.g. of Scherzer type
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D15/00—Movable or portable bridges; Floating bridges
    • E01D15/12—Portable or sectional bridges
    • E01D15/133—Portable or sectional bridges built-up from readily separable standardised sections or elements, e.g. Bailey bridges

Definitions

  • the present invention relates to an automatic coupling device for a detachable connection of the upper girders of two-partite drawbridges, the structural bridge elements of which are adapted to be transported stacked one on top of the other, on a carrier vehicle and are adapted to be loaded and unloaded by means of an arm or boom pivotally arranged at the carrier vehicle according to the German Published Document 1,658,622, published on Oct. 29, 1970.
  • the purpose of this invention is a simplification of the connection of the bridge parts with one another of drawbridges adapted to be transported and placed on vehicles and of the installations required therefor in connection with drawbridges of the aforementioned type.
  • drawbridges adapted to be transported on a vehicle, which consist of a number of bridge parts, with a device for loading and unloading the bridge and for connecting the bridge parts with one another (DAS 1,251,787).
  • DAS 1,251,787 a device for loading and unloading the bridge and for connecting the bridge parts with one another.
  • one bridge element is guided over the other bridge element by means of a chain drive and by way of guide rollers and is lowered over an incline onto the plane of the other bridge part.
  • the lower girders of the bridge parts are thereby guided and held hook-like one within the other in abutment devices.
  • the upper girder mounting is accomplished by means of arms which are provided with guide rollers which roll off between the upper girders of the bridge parts arranged therebelow and which are held together by clamping the guide rollers of one bridge part against the incline of the other bridge part.
  • the thus'connected bridge can be subsequently extended out by means of telescopic arms by the intermediary of carrier rollers and may be lowered down in front of the vehicle.
  • This prior art device requires a very high degree of accuracy as to the size of the guide rollers as well as of the guide tracks relative to each other and a distortion-free construction of the bridge parts and a special shape of the bridge which involves a considerable technical effort and expenditure as regards manufacture.
  • the present invention has the task to provide a simple, engageable and disengageable connecting installation for the upper girder of two-partite drawbridges, in which the connection and disengagement of the upper girders, in avoiding the aforementioned disadvantages, is accomplished automatically in dependence on the mutual position of the bridge parts and of the position thereof in relation to the boom and in which a loading and disengagement of the entire bridge is possible from each bridge end.
  • the installation consists of locking members pivotally arranged against a spring force which are positively guided by control levers disengaged by spring-loaded stops or abutments arranged at the boom and which are influenced by feelers controlled by the position of the associated bridge part.
  • the locking members are preferably constructed as T- shaped pivot levers and engage in the locked position into locking notches arranged at the other bridge part.
  • the locking members are each loaded by a tension spring supported at the one bridge part and arranged perpendicularly to the plane of the bridge; the draw spring thereby engages at the locking member by way of a lever arm non-rotatably connected with the locking member.
  • the locking members constantly loaded by the force of the tension spring in the direction of their locked position, are brought into their opening end position during loading of the bridge by way of the boom of the transportation vehicle, against the spring force by means of a positive control cooperating with stops arranged thereon and are locked thereat by the locking members coordinated thereto during the separation of the bridge parts.
  • the automatic release of the two bridge parts takes place advantageously by means of the control levers pivotally arranged at one of the bridge parts which are provided with a control cam at the end coordinated to the lokcing members, into which engages a control arm nonrotatably connected with the locking members.
  • the locking members are preferably non-rotatably connected with a safety or securing lever which is lockable in a locking lever operated by a feeler or sensing device inserted into the end face of the one bridge part.
  • the bridge parts are further provided alternately with a recess and with a complementary projection whereby the feeler or sensing device for the control of the locking latch extends into the plane of the recess.
  • the forced or positive control of the locking member is also operated for the disengage ment of the bridge parts during the pick-up or loading of the bridge, whereas during the unloading of the bridge, i.e., during the connection of the bridge parts, it remains ineffective since the adjusting movement of the locking member into the locked position is forcibly brought about by means of the draw spring.
  • the arrangement offset in the longitudinal direction of the two stops arranged at both sides of the boom further permits a pick-up or loading of the bridge from its one end or from its other end whereby the two bridge parts are disengaged nonetheless at the same place of the boom.
  • FIG. 1 is a side view of the mutually facing end faces of a two-partite drawbridge according to the present invention in the coupled condition of the two bridge parts;
  • FIG. 2 is a cross-sectional view through the connecting device of the drawbridge taken along line lI-II of FIG. 1;
  • FIG. 3 is a longitudinal cross section through the connecting device of the drawbridge taken along line III- II[ of FIG. 1 whereby the feeler and the structural members influenced thereby are illustrated in one plane of the drawing for better explanation and understanding.
  • the two bridge parts 1 and 2 of a two-partite drawbridge illustrated and described also in more detail in the aforementioned patent application, include lower girders 4 and upper girders 5 connected with each other by a vertical web 3.
  • the lower girders 4 form guide rails, in which run support roller pairs 7 and 8 arranged on a boom 6, indicated only schematically, of the transport vehicle (not shown)
  • the upper girders 5 form a track or traffic surface of the bridge.
  • the bridge parts 1 and 2 which are disposed one on top of the other in the transporting position when taken along on the carrier vehicle, are connected or coupled with each other in an aligned utilization position, for which purposes corresponding means are provided at their mutually facing end faces.
  • locking members 12 are provided which are pivotally supported in the bridge part on both longitudinal sides of the bridge; the
  • locking members 12 are constructed as T-shaped swinging or pivot levers (see FIG. 3). In the locked po sition, the locking members 12 engage with their free ends provided with a cross bar 13 behind locking nose portions 14 arranged at the other bridge part 2.
  • the locking members 12 are pivotally supported about a horizontal axis in the bridge part 1 and are stressed in the locking direction by a tension spring 16 engaging with a lower arm 15 non-rotatably connected with the locking member 12; the spring 16 is supported by way of a brcket 17 against the bridge part 1. Since the locking system is constructed in the same manner on each bridge side, only one side will be described hereinafter.
  • a control arm 18 is non-rotatably connected with the locking member 12 to rotate in unison therewith and is in engagement with a control cam generally designated by reference numeral 20 and arranged at a control lever 19.
  • the control lever 19 is pivotally supported about a horizontal axis and laterally at the bridge part 1 by means of a pivot bearing 21 (FIG. 2) and extends with its lower end 22 (FIG. 1) to the height of the boom 6.
  • stops and 26 are pivotally supported about horizontal pivot pins 23 and 24 which, under the effect of compression springs 27 and 28, are urged into engagement with the control lever 19 and which point with their free ends toward the free end of the boom 6.
  • the stops 25 and 26 are constructed as double-arm levers whose shorter lever arm 29 or 30 is traversed by an adjustable stop 31 or 32, respectively, which in its turn, cooperates with an abutment 33, 34 at the boom 6 and which limits the engaging height of the stops 25 and 26 with respect to the control lever 19.
  • the compression springs 27, 28 are supported against abutments 35, 36 at the boom 6.
  • a safety or securing lever 37 which is disposed opposite to the control lever 18, is non-rotatably connected with the locking member 12;
  • the securing lever 37 has an essentially segment-shaped configuration and is provided with a locking or detent recess 38.
  • a pivotal locking lever pivotal about a vertically extending pivot pin 39 arranged laterally of the securing lever 37 and pivoted transversely to the plane of movement of the securing lever 37 cooperates with the latter; the locking lever 40, in turn, is adjustable by means of a lever 42 cooperated with a feeler 41.
  • the two spring-loaded levers 40 and 42 are thereby pivotably supported by way of the pivot pin 39 having a common axis of rotation.
  • the feeler or sensing member 41 is aligned in the longitudinal direction of the bridge part 1 and extends with its free end into a recess 43 arranged at the end face thereof.
  • a projection 44 is provided at the other bridge part 2, having the same shape as recess 43, i.e., is complementary thereto, which extends into the recess 43 when the bridge parts 1 and 2 are in a position abutting against each other and thereby, on the one hand, adjust the feeler 41 and on the other, centers the bridge parts 1 and 2 with respect to each other.
  • the two stops 25 and 26 are arranged mutually offset in the longitudinal direction of the boom 6, whereby a pick-up or loading of the bridge can be carried out in both directions of travel R.
  • the control cam 20 of the control lever 19 is provided on both sides of its base 45 with control cams of differing slopes 46 and 47.
  • the bridge is retracted so far on the boom 6 in the direction of arrow R until the free end 22 of the control lever 19 abuts against the abutment 26.
  • the control lever 19 forces by way of the cam 46 a pivoting motion of the control arm 18 of the swinging motion.
  • the free end of the locking member 12 becomes disengaged from the locking nose portion 14 due to the pivot movement so that the bridge parts 1 and 2 are now uncoupled or disengaged as regards the upper girders 5 thereof.
  • a release 42' in the connection between the levers 40, 42 brings about that the feeler 41 reaches its starting position serving the preparation for a renewed coupling operation.
  • the bridge part 2 is now raised with the aid of support arms (not shown) in such a way that the bridge part 1 can be slid under the other bridge part 2. Thereafter, the support arm is swung back whereby bridge part 2 comes to lie above the bridge part 1. After securely lashing the parts, the bridge is thus transportable. In the described position, the locking member 12, the control lever 19 and the securing members 37 to 42 remain in their assumed-position until the bridge parts 1 and 2 are again connected with each other for the unloading of the bridge.
  • the end faces of the bridge parts 1 and 2 are moved in reversing the movements which caused the same to be positioned one on top of the other as described hereinabove, whereby the projection 44 of the bridge part 2 comes into engagement with the recess 43 of the bridge part 1.
  • the bridge part 1 is slightly lowered toward the road surface and subsequently raised again.
  • the feeler 41 is pressed in a direction opposite the direction of arrow R as shown by overcoming the locking effect between the notch 41' and lever 42. With the thus-released locking effect, the locking member 12 is not pivoted into the closing position under the effect of the tension spring 16 and is automatically held fast thereat.
  • control lever 19 is brought into its vertical starting position by the control arm 18 and is also held fast thereat.
  • the control lever 19 passes the abutments 25 and 26 at the boom 6 in the reverse direction whereby it presses the same down against the effect of the compression springs 27, 28 so that the abutments cannot exert any influence on the position of the control lever 19.
  • connection without hinge pins may also be selected, for example, in a manner according to the upper girder construction where a projection at one bridge part engages a correspondingly constructed recess of the other bridge part.
  • said locking member means being movable between a first locking position corresponding to locking engagement of said locking member means with said second part and a second unlocking position corresponding to disengagement of said locking member means for said second part,
  • control means including control lever means, said control lever means being operatively engaged with said locking member means, said control lever means being movable between a first control position where said control lever means permits movement of said locking member means to said first locking position and a second control position where said control lever means forces said locking member means to said second unlocking position, and stop means attached to said boom means, said stop means being positioned with respect to said control lever means such that said stop means engage said control lever means to automatically move said control lever means from said first control position to said second control position in response to predetermined relative movement of said boom means and said first part.
  • said locking member means includes a transversely extending portion which engages behind locking nose portions of said second part when said second locking position.
  • said first part includes a longitudinally extending recess open at a free end of said first part
  • said second part includes a longitudinally extending protrusion which engages in said recess to align and center said first and second parts with respect to one another when said first and second parts are in position tr be locked together by said locking member means.
  • said feeler means is constructed as a spring loaded plunger extending in said recess and engageable with said protrusion.
  • said securing means includes spring loaded locking lever means engageable with said locking member means and said feeler means.
  • control lever means includes control cam means which engage control arms non-rotatably connected to said locking member means to effect said movement of said locking member means to said second unlocking position.
  • control lever means includes control cam means which engage control arms non-rotatably connected to said locking member means to effect said movement of said locking member means to said second unlocking position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Bridges Or Land Bridges (AREA)
US00135220A 1970-04-17 1971-04-19 Disengageable connection for drawbridge girders Expired - Lifetime US3744075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702018476 DE2018476C3 (de) 1970-04-17 Vorrichtung zum selbsttätigen Verbinden bzw. Lösen der Obergurte der beiden Teile zweiteiliger Brücken

Publications (1)

Publication Number Publication Date
US3744075A true US3744075A (en) 1973-07-10

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ID=5768355

Family Applications (1)

Application Number Title Priority Date Filing Date
US00135220A Expired - Lifetime US3744075A (en) 1970-04-17 1971-04-19 Disengageable connection for drawbridge girders

Country Status (3)

Country Link
US (1) US3744075A (enrdf_load_stackoverflow)
FR (1) FR2092447A6 (enrdf_load_stackoverflow)
GB (1) GB1349874A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742590A (en) * 1985-09-24 1988-05-10 The State Of Israel, Ministry Of Defense, Israel Military Industry Bridging kit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110344330B (zh) * 2019-06-26 2020-09-01 中铁二十三局集团第三工程有限公司 一种使用小型机械架设t型梁的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160900A (en) * 1958-05-24 1964-12-15 Beteiligungs & Patentverw Gmbh Dismountable bridge, for instance floating bridge
US3386117A (en) * 1964-12-10 1968-06-04 Svenska Metallverken Ab System for connecting buoyant bodies together
US3504389A (en) * 1966-12-16 1970-04-07 Nat Res Dev Bridges

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160900A (en) * 1958-05-24 1964-12-15 Beteiligungs & Patentverw Gmbh Dismountable bridge, for instance floating bridge
US3386117A (en) * 1964-12-10 1968-06-04 Svenska Metallverken Ab System for connecting buoyant bodies together
US3504389A (en) * 1966-12-16 1970-04-07 Nat Res Dev Bridges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742590A (en) * 1985-09-24 1988-05-10 The State Of Israel, Ministry Of Defense, Israel Military Industry Bridging kit

Also Published As

Publication number Publication date
DE2018476B2 (de) 1975-11-13
FR2092447A6 (enrdf_load_stackoverflow) 1972-01-21
DE2018476A1 (de) 1971-10-28
GB1349874A (en) 1974-04-10

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