DE2423304A1 - CLAMP FOR FASTENING CRANE RAILS TO BEAMS - Google Patents

Description

Patent attorneys

Dipl.Ing. D. Karl arose

D-8023 Munich-Pullach
Wiener Str. 2.T.Mchn. 7930570,793i782

DBr / au Munich-Pullach, May 13, 1974

Michael John French, Hurley Lodge, Mill Lane, Hurley , Berkshire, UK

Clamp for attaching crane rails to girders.

The invention relates to a clamp for fastening crane rails on carriers as well as an attachment containing such a clamp.

Crane rails are made as continuous length sections welded together to avoid the high impact forces that occur when a wheel goes through a normal shock moves. The crane rails behave as continuous beams and any deflection of the crane girder that carries the rail, leads to a differential movement in the longitudinal direction of the rail. The under the acceleration and braking of the crane wheels on The forces transferred to the rails also lead to longitudinal movements of the rails. To sideways movement of the rails leading surge forces are caused by transverse movements of the trolley and load or those on the side of the rail head generated by the wheel rims or by control rollers applied control forces.

A known type of fastening device for crane rails has a clamp in the form of a one-piece part made of steel

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sheet metal, the base portion of which can be fastened with bolts on the surface of the beam or other support located above is, wherein a section forming a spring tongue, which is located in front of the side of the base section which is remote from the rail extends and is arched back over the base portion and then arched downward, with its outer end to it serves to be in engagement with the rail foot. However, this fastening device is extremely expensive and can in some cases longitudinal structural movements and expansion movements of the rail are not permitted.

Another known device has a clamp made from spring steel sheet. The clamp has a 'substantially flat section which is provided with an opening which, with play, serves to accommodate a screw bolt which is connected to is welded to a carrier on which the rail is to be mounted. The clamp has a curved end portion, des sen outermost end is to come into engagement with the rail foot.

In order to clamp a rail on a carrier, a plate through which the screw bolt extends is against the Rail foot pressed by means of a cam, by means of which the position of the foot plate on the carrier can be variably adjusted. One The nut is then screwed onto the bolt so that the substantially flat portion of the clamp is against the footplate is clamped in such a way that the outermost end of the curved end portion exerts pressure on the rail foot. These known fastening device has the disadvantage that the clamp can loosen and also has the outermost end of the arched end portion of the clamp has the tendency to dig into the rail foot, thereby creating longitudinal structural movement and expansion movements of the rail are prevented.

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It is an object of the present invention to provide a clamp j to attach crane rails to girders, which : can be used in such a way that the above-mentioned, with longitudinal j problems connected with sideways movements can be solved or at least alleviated in a highly economical manner.

; Another object of the invention is to provide such a; To create a clamp containing device, this device device is adjustable so that misalignment of the rail is correct. can be yawed.

According to one aspect of the invention there is a clamp for fastening created a crane rail on a carrier of the type in which the clamp is made of celebration steel and a portion of the clamp is clamped onto the surface of a carrier, thereby applying a force to another part of the clamp exerts on a rail foot, which is characterized in that the clamp is made of bar spring steel, and that the Clamp made from a one-piece component with two end portions by which the clamp is retained on the carrier, and a middle section through which a force is exerted on the rail foot, the two end sections both lie on the same side of a plane through the center of the middle section which is not through either of the two End sections extending and wherein the end sections are both directed in the direction of the plane through the center of the central section are.

According to another aspect of the present invention, a device for securing a crane rail is provided a carrier, the device comprising a clamp made of spring steel and a portion of the clamp

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the surface of the carrier is clamped 55 to cause another part of the terminal aft a Kt hoof exerts the rail, which is characterized in that - the clamp of Federstangen4 is made of steel and a continuous component \ the end sections of both loading is to on the same side of a plane which cut through the center of a middle lab; the clamp and does not extend through either of the two end sections; wherein the two end sections are directed in the direction of this plane, and wherein the device also has a. Base plate, which is arranged on the carrier, a clamping plate, a screw; bolt, which is welded to the carrier and from corresponding openings in the base plate and the clamping plate. is taken and has means by which the end portions of the clamp clamp between the clamping plate and the footplate, whereby the central portion of the clamp exerts a force on the rail foot.

; In a useful embodiment, the or each is the Foot plates formed in the form of a polygon and the opening arranged eccentrically in the or each of the foot plates. Before-

; Preferably, the clamping device consists of a nut which . can be screwed onto the screw bolt and a conical

see woodruff, which between the nut and the clamp j 'Plate is arranged.

j If such a device is used to mount a rail

: attached to a carrier, it allows movements of the slide ·

! ne in the longitudinal direction, so that structural movements and expansion

sion movements of the rail are possible. The clamp offers

j but essentially no resistance to the side on the

J rail exerted surge forces, such forces being due to

v / ground the footplate, if necessary

j should be to which beam can be welded after j the rail has experienced its final alignment.

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In the following the invention with reference to in the drawings j exemplary embodiments illustrated and in particular j whose practical use is explained in more detail. It shows:

Figure 1 is a plan view of part of the inventive Apparatus in use in clamping a rail 9 onto a support;

FIG. 2 shows a side view of the device according to FIG. 1;

FIG. 3 shows a rear view of the device according to FIG. 1; !

Figure 4 is a plan view of a second embodiment of the! Invention for use in clamping a j rail onto a support and j

Figure 5 is a rear view of the illustrated in Figure 4 |

i device. ;

The device illustrated in Figures 1 to 3 of the drawings comprises a clamp 1 made of spring bar steel, for example 15 mm diameter EN 29 spring steel. The clamp 1 has arcuate sections 2 which diverge outwards proceed from the central section 3 of the rod. The middle portion 3 is used to engage with the foot of a To reach the rail 4 and to press it against a carrier 5. The arcuate sections 2 extend upwards from the middle section 3 and are continued by wide © arc-shaped sections 6, which converge towards each other inwards, extend downward and continue through end portions 7 of the clamp. The end sections 7 of the clamp 1 extend in the direction of the central section 3 of the rod and preferably the end sections 7 are towards one another

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converging aligned.

The end sections 7 of the Klemn.e 1 rest on a square foot plate 8 made of steel, which has a circular opening 9 for receiving a screw 7, narrow 10, which is welded to the support 5 j. The opening 9 has a section of enlarged diameter? for receiving the weld metal with the; the screw bolt 10 is welded to the carrier 5. The opening 9 is preferably arranged eccentrically in the base plate 8. ;

An existing steel clamp plate 9 * which is designed as a hardened j circular disk is arranged vertically to the terminal 1 with this in contact above \. ■

The device also has a nut 13 which can be screwed onto the screw bolt 10 and above the clamping plate te 12 is arranged to clamp the clamp 1 between the clamping plate j 12 and the footplate 8. A conical woodruff 14 is arranged between the nut and the clamping plate. The conical disc spring 14 has a certain load deflection characteristic so that when the spring is compressed when tightening the chuck 13, a certain force is applied the clamping plate 12 is exerted and the nut 13 is kept fully tightened.

In order to prevent the clamp 1 from rotating on the base plate 8, the base plate is preferably provided with grooves (not shown) for receiving the end sections 7 of the clamp 1. Different pairs of grooves can be specified in accordance with the Adjustability of the position of the footplate 8 is provided which is explained in more detail below. Alternatively, the undersides of the end portions of the

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242330Λ

Terminal 1 may be corrugated or corrugated in order to prevent j

: so that the clamp rotates. . - |

When using the device according to the invention for fastening i

. Stigen a rail 4 on a carrier 5 is the middle distance '

- cut 3 of the rod that makes up the clamp ", arranged in such a way that that it is arranged over the rail foot on the carrier,

ineten rail. The end sections 7 of the clamp 1 are:. on the base plate 8 and welded to the carrier 5 '. Screw bolt 10 extends through the opening 9 in the foot ^;

- Plate 8, which can be welded to the carrier 5 after the final alignment of the rail 4. The foot plate 8 is arranged with one edge against the rail foot of the rail 4. If the opening in the footplate is arranged eccentrically, a misalignment of the rail can be corrected by: that an appropriate edge of the footplate 8 is selected in order to lie against the rail. In this way, rails j on existing supports, which due to subsidence a; are incorrectly aligned or no longer in a line! lie, be realigned. The rails of a large j shipbuilding crane, for example, can be up to 100 m apart j, a tolerance of + 2 mm being required j and thus it is obvious that a certain adjustability j of the rails may be required. By changing the dimensions of the footplate 8 or by increasing the number of its side edges, the most varied degrees of misalignment of the rails can be corrected. The dimensions of the footplate are preferably such that a minimum change of 6 mm in the orientation of a rail can be achieved by rotating the footplate so that different sides of the footplate are adjacent to the rail foot.

The nut 13 is then tightened on the screw bolt 10,

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in order to thereby compress the Seheilen spring 14 and to clamp the clamp 1 between the clamping plate 12 and the foot plate 8. While the Multer ^Λ 3 is being tightened, the clamp 1 is deflected and the M iHeiabschnitt 3 of the rod that makes up the clamp exerts a Lan-t on the foot of the rail 4. For example, if the clamp is made of a spring steel rod of 15 mm diameter from EK 29 spring steel, and the length of the central portion 3 of the rod that is connected to the

Rail foot is in contact, is 25 mm, which on the The clamping load exerted on the rail foot must be 3/4 t.

In Figures 4 and 5 of the drawings is another embodiment of the invention, the illustrated device having a greater peak load, for example of 1 1/2 t can exert on the foot of the rail. The illustrated device includes a clip 15 made of spring bar steel with a diameter greater than 15 mm. The clamp 15 j has arcuate portions 16 which extend from a central ab- ' Section 17 of the rod are designed to diverge outwards, the middle section 17 is used to engage with the rail 18 and press it against the storage, i.e. the carrier. The arcuate portions 16 extend from the middle section 17 upwards and are continued by arcuate sections 20 which are outwardly relative to one another are divergent, extend downward and are continued by end portions 21 of the clamp, which extend in the direction of the rail 18. The device also has two foot plates 22 and two clamping plates 23 for Clamping on the corresponding end portions 21 of the clamp. Each foot plate 22 and each clamping plate 23 has an opening or 25 to accommodate the corresponding screw bolt 26, which is welded to the carrier or bearing 19.

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It is evident that within the scope of the present invention instead of a screw bolt welded to a carrier from a clamping plate and a base plate of an inventive j sen device included; will, 'this clamp and footplate can be configured to receive a bolt otherwise attached to the bracket.

Rails, which by means of a device according to the invention are attached to a carrier, are preferably "softly stored" by an elastic cushion, for example rubber, is placed between the rails and the bearing.

All of those mentioned in the description and in the drawings recognizable technical details are essential for the invention of Badeutung.

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Claims (9)

- ίο - claims 1. Clamp for fastening crane rails to girders, whereby the ' ii2! emme made of spring steel herpes t-evllt and a section of Klemjme clamped onto the surface of a beam, thereby applying a force to another portion of the clamp on the rail foot; exercises, characterized in that / iie clamp (1, 15) is made of springs bar steel is made and that the clamp (1, 15) by j a continuous one-piece component is formed which; two end sections (7, 21) through which the clamp (1, 15) is attached the carrier (5, 19) is held, and has a central portion (3, 17) through which a force on the rail foot (27); is exercised, the end sections (7, 21) both on the; same side one through the middle of the middle section (3 »! ; 17) and through none of the end sections (7, 21) extending Ebe-j ■ ne lie and wherein the end sections (7, 21) both in the direction ι i the plane through the middle of the middle lab se hnittes (3, 17) gerich- j are ί tet. 2. Terminal according to claim 1, characterized in that the small ■ me arcuate sections (2), which with respect to each other are arranged diverging from the middle section (3) to the outside, wherein the arcuate sections (2) by arcuate Sections (6) are continued which converge towards one another inwards and these converge towards ir »n Sections are continued by the end sections (7) of the clamp (1) ', which essentially extends in the direction of the mit telabschnittes (3) of the clamp (1) extend, 3. A clamp according to claim 2, characterized in that the outwardly diverging arcuate sections with respect to one another extend upwards from the central part (3) of the clamp (1) so that the inwardly converging arcuate sections (6) extend downward and that 409851/07 0 5 the outwardly diverging arcuate sections (2) on the same side of the plane as the central section (3) of the clamp (1) go out. 4. Clamp according to claim 1, characterized in that the clamp Me (15) has arcuate .Abschnitte (16), which in relation to-! are aligned diverging from one another from the central section (17) of the clamp (15) to the outside, wherein the arcuate ab-; cuts (16) continued through arcuate sections (20) who | those that diverge outwards with respect to one another and which are continued through the end portions (21) of the clamp (15). j 5. "Clamp according to claim 4, characterized in that there are outwardly diverging arc-shaped sections with respect to one another (16) extend upwardly from the central portion (17) of the clamp (15) that those extending upwardly; arcuate sections (16) continuing arcuate ab-; cuts (20) extend downward and that the outwardly diverging arcuate sections (16) from the central section (17) of the terminal (15) go out on the same seed of the mentioned level. 6. Device for fastening a crane rail on a carrier with a clip made of spring steel, with a portion of the clip clamped onto the surface of the carrier is whereby another portion of the clamp exerts a force on the rail foot, characterized in that the clamp (1, 15) is made of spring rod steel and is designed as a one-piece continuous component which end sections (7, 21), -which both lie on the same side of a plane passing through the middle of a central section (3, 17) the clamp (1, 15) and through none of the end sections (7, 21) 409851/0705 runs, wherein the end sections (7, 21) are both directed in the direction of the plane that the device also has a footplate (8, 22), which is arranged on a carrier (?, 19), a clamping plate (12, 23), a screw bolt (10, 26) which is attached to the Supports (5, 19) welded on and in corresponding openings in the base plate (8, 22) and the clamping plate (12, 23), and means (13, 14) through which the end sections te (7, 21) of the clamp (1, 15) is clamped between the clamping plate (12, 23) and the foot plate (8, 22), v / o by the means section (3, 17) of the clamp (1, 15) exerts a force on the rail foot (27). 7. Apparatus according to claim 6, characterized in that the base plate is designed as a polygon and that the opening in the footplate £ 8, 22) is arranged eccentrically. 8. Apparatus according to claim 6 or 7, characterized in that the base plate (8, 22) is provided with a number of pairs of grooves is, where ^ each pair is formed such that the End portions (7, 21) of the clamp (1, 15) receives. 9. Apparatus according to claim 6, 7 or 8, characterized in that the clamping device has one on the screw bolt (10, 26) screw-on nut (13) and a conical woodruff key (12), which between the nut (13) and the clamping, plate (8, 22) is arranged. 409851/0705 lee rs e i te