DE2945002A1 - LIFT FOR USE IN METAL CONSTRUCTION, AT SCHAECHTEN, TUERMEN AND THE LIKE CONSTRUCTION - Google Patents

Description

29-5002

The invention relates to a lifting platform or platform that can be raised and lowered for use in metal construction, in shafts, towers and similar structures that allow one or more people to and move downwards.

Structures in which such a lifting platform can be used are, for example, metal scaffolding for architectural structures, masts or shafts, telecommunication towers, observation towers for fields, pastures, Plantations and forests or wherever else moving people up and down is required.

Such a lift is particularly useful because it replaces stairs that would otherwise have access to a facility or offer facilities that are erected on towers, scaffolding or in shafts, which Reach a certain height or depth and, for example, permanent by technicians or operating personnel require inspections or monitoring to be carried out.

In most such cases, the establishment is from

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conventional, powered elevators too expensive or even impractical; access to Systems or facilities are created with the help of stairs, which are equipped with protective railings (body protection) and fixed intermediate platforms are provided, which not only give users a considerable physical Demanding effort, but also the reason why these users are exposed to inevitable falls are. This situation becomes even more serious in cases where someone needs to go up or down, who carries a certain system part and / or tools that are necessary for the maintenance of the monitored equipment are.

The object of the invention is therefore to create a platform or lifting platform that can be raised and lowered, with of people being brought up and down in a completely safe and gentle manner can be operated by the user himself, without the aid of any prime mover and can be controlled and which are simple in their construction and easily attached to metal structures, towers of various kinds Art, manholes and other constructions is customizable.

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The lifting platform or platform should also be able to be stopped immediately whenever and wherever the user requests it. This lift should require practically no maintenance or care at all, it should be of stable, weatherproof construction and in its effectiveness and Functionality is not impaired even by long breaks.

This is achieved according to the invention by a metal frame of substantially parallelopipedal shape, the with an upper floor to carry the user and mounted on the outside facing each other Guide devices is provided, the latter being slidably fitted onto a pair of corresponding rails are vertical along the extension of the fixed structure on which the lift or platform is attached is mounted, are attached, with one end of a Support rope made of steel wire and attached to its lower section one end of a counterbalancing steel rope and these ropes are each attached to an upper pulley or pulley at the end of the fixed structure.

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are guided over a lower pulley attached to the base of this construction, with their other ends are attached to a weight-adjustable counterweight that runs along one of the this construction is vertically fixed rail slidable, and it adapts to various User holding points of the construction allows the lifting platform or platform to be opened or closed only by Pushing down his body to move, as well as by one on the frame below the floor horizontal, freely rotatable and normally blocked against rotation by brake shoes Cylinder that can only be released from the blockage by the user using a foot pedal is and is wrapped by two or three turns of a steel brake cable that is vertical and is stretched parallel to the direction of movement of the lift or platform and its upper or lower End at the top or at the base of the Konstrak-r tion is attached so that the cylinder for rotation during the up and down movement of the lift is forced around its own axis and along the brake cable.

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In a preferred embodiment of the invention, the guide devices consist of two pairs cylindrical rollers, preferably made of nylon, which are horizontal and rotatable on two opposite sides Sides of the frame are attached. Each of the rollers has a circumferential, central recess Receipt of the corresponding rail and two axial recesses on the side surfaces for receiving two Roller bearings and two outer journals, also preferably made of nylon, on, the journals and the Rollers themselves are pierced in the middle, so that the fixed axis carrying the arrangement can be passed through is.

Preferably, each pair of rollers is attached to a respective long, vertical support, which is on one Side of the frame is mounted protruding above and below it. The total of four roles are located near the ends of the opposing pair of supports, and the attachment of the support cable and of the balancing rope on the frame is made at one of the ends of one of these carriers.

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Each of the supports can consist of a U-shaped metal profile rod, the side legs or angles are turned outwards and carry a pair of rollers inside.

The counterweight can be a vertical flat plate and a horizontal plate attached to the outer surface thereof Table include to hold main weights and additional weights; on the inner surface of the plate, and near each of its ends a pair of rollers, preferably made of nylon, are horizontal and arranged parallel to each other, and a rail runs between them.

These rollers preferably also have a circumferential, central recess for engagement with the rail and on its side surfaces two axial recesses for receiving roller bearings and Pin, also preferably made of nylon, on, and each one with its one end perpendicular Axle attached to the plate of the counterweight passes each roller in its longitudinal direction.

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The weights advantageously have a central hole through which one with its lower end on the table and at its upper portion fits rod attached to the base plate by a slide holder.

According to a preferred embodiment, there are brake shoes for the cylinder on its rear side connected to a pair of vertical arms facing each other with respect to the cylinder, at hers upper section below the floor are connected to the frame and at their lower section are tensioned against each other by a spring. The spring is dimensioned such that the brake shoes pressed against the cylinder to block it. The lower ends of the arms are the Spreading action of a pair of eccentrics mounted on a shaft exposed, this shaft through the pivoting of a radial arm connected to a vertical rod carrying the foot lever is rotatable.

The eccentrics can be roller bearings that are diametrically opposite each other and in symmetrical

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Order are mounted between two discs fixed on the shaft; the lower ends of the Arms are then located between the discs and outside the roller bearings.

The rails on which the various rollers slide can be rectangular hollow section bars be whose surface intended for attachment to the structure with a central Longitudinal groove is provided through which the body of the fastening bolts or the through bolts leads through.

The lifting platform according to the invention thus essentially comprises in a preferred embodiment a metal frame with a top floor and two facing each other on opposite sides arranged beams, with one on top of the other, along the height of the fixed Construction on which the lift is to be installed, arranged sliding rails Roles are provided. One of these girders is firmly connected to one end of a steel cable that is over

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one mounted at the top of the fixed structure Sheave is guided and attached at its other end to a suitable adjustable counterweight which is vertical along a corresponding one provided on the fixed structure Leadership can slide. In the area below the metal structure or frame of the lift is located also a freely rotatable cylinder or drum, which or which by brake shoes constantly against rotation is blocked. The brake shoes can only be activated by operating an automatically returning foot pedal can be released from the blocking position by the user. The cylinder is of one or two Windings of a steel cable wrapped around it, which is stretched parallel to the direction of movement of the lift and one end of which is fixed to the top of the fixed structure and the other end to the base is so that the cylinder rotates properly on its axis when the lift is moved up or down.

This type of extremely simple construction allows the lift to be balanced for various

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different operating conditions with the help of a simple adjustment of the counterweight that magnifies or can be reduced. When the lift is loaded and the counterweight is in is in a balanced state, the user needs to raise or lower the platform lower, only with the least amount of force and by being at different points of the fixed construction or holds on to suitable means firmly connected to this, to support his body or to press down while continuously pressing the brake shoe release lever.

In order to completely and safely stop the lift or platform at any point in its path, the user only needs to release the pressure exerted on the brake pedal.

Further objects, features and advantages of the invention emerge from the following Description of a preferred embodiment with reference to the attached drawing.

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Fig. 1 shows a perspective view of the liftable or lowerable lifting platform or platform, parts broken away and other parts cut for the sake of better illustration are reproduced.

Fig. 2 shows in elevation an enlarged side view of the brake cylinder, the brake shoes and the mechanism that supports and moves the brake shoes.

Fig. 3 shows a simplified and enlarged front view of the arrangement, the foot lever and connects the opening and closing mechanism of the brake shoe carrier with each other.

Fig. 4 shows in elevation an enlarged front view of the brake cylinder.

Fig. 5 shows a rear perspective view of one of the brake shoes.

6 is an enlarged view of a along

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the line 6-6 in Fig. 1, the section showing the engagement system of one of the Lift or platform guides attached to the fixed structure Rail shows.

Fig. 7 shows a "rear view of the counterweight.

FIG. 8 shows a side view of the arrangement according to FIG. 7.

FIG. 9 is an enlarged view of a section taken along line 9-9 in FIG. 7 which also shows the guide rail of the counterweight.

Fig. 10 shows a perspective view of the main weights of the counterweight.

11 shows a perspective view of additional weights of the counterweight.

Fig. 12 shows a perspective view of the safety

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ORIGINAL INSPECTED

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setting or position control handle or bracket of the weights on the counterweight.

As shown in the figures of the drawing, the lifting platform in question comprises a metal frame 10 of substantially parallelopipedal shape with an upper floor 11, two vertical guide beams 12, of which the one at the front and the other .at the back as extensions with a U-shaped Reach profile and the lower end of which is attached to the frame 10, two L-shaped, horizontal and profile rods 13 which run parallel to one another and are arranged directly below the floor 11 and form a carrier for receiving small adjustment counterweights 110, and also two laterally extending Carrier 14 on which a brake cylinder 20 is mounted transversely.

As shown in FIGS. 1 and 4, the brake cylinder 20 is arranged horizontally below the floor 11, so that its ends of a continuous axis 21, which on upper extensions 15 of the laterally extending Support 14 of the frame 10 is attached to be carried.

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At the ends of the brake cylinder 20 are two cylindrical, axial extensions 22 by welding or other suitable means Method attached, the end faces are provided with a central recess that a Bearings 23 and a plug or pin 24, preferably made of nylon (see Fig. 4).

A steel cable 26 is, as shown in Fig. 1, looped with two or three turns around the brake cylinder 20, the ends of the steel cable 26 at the upper or lower end of the tower structure or the like are attached so that the rope 26 is stretched vertically and parallel to the displacement path of the lifting platform or Platform remains. Even if not shown in the drawing, it goes without saying that the brake cylinder 20 can be provided on its peripheral surface with a helical groove to the Windings of the steel cable 26 during the movement of the lifting platform in a constant axial position to keep. In such an arrangement, the brake cylinder 20 forcibly rotates about its axis 21 when the lift is moved up or down so that it is possible by stopping the rotation

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of the brake cylinder 20 by means of a braking system, the platform at any desired height or To hold on to the depth securely.

The brake mechanism 30 consists, as shown in more detail in FIGS. 2 and 4, of two curved brake shoes 31 (see also Fig. 5), which are attached with their back to a pair of vertical arms 32, which are in turn connected to the frame 10 at their upper portion below the bottom 11 in such a way that each of them is located on one side of the brake cylinder 20. The brake shoes 31 are on the inside, i.e. the side facing the brake cylinder 20, of the arms 32 so that their concave surfaces, the are coated in a suitable manner with an appropriate material, against the side or lateral surface of the brake cylinder 20 can be pressed or moved away from it by the upper ends of the arms 32 moved closer or away.

As shown in Figs. 1 and 2, the lower ends of the arms 32 by a spring 33 are continuous forced towards each other; this spring 33 is so

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dimensioned that it causes a pressure of the brake shoes 31 on the brake cylinder 20, which is sufficient is to stop the latter and, consequently, the lift itself.

1 and 3 show the drive mechanism of the arms 32, which comprises a horizontal shaft 34, the ends of which are supported by bearings 35 attached to the lower portion of the frame 10. This wave 34 carries a pair of parallel discs 36, between which two roller bearings 37 are mounted and off-center Positions are arranged diametrically opposite one another and symmetrically to the shaft 34. One of the disks 36 is fixed directly on the shaft 34, while the other with the first with the help of the axes of the mentioned Roller bearing pair 37 is firmly connected.

Each of these rollers 37 is outwardly at the extreme end portion of one of the arms 32, so that when the shaft 34 rotates, the rollers 37 force the arms 32 apart in opposite directions, whereby their lower portions moved away and the brake shoes 31 released from contact with the brake cylinder 20 will. The shaft 34 also has a radial

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extending fixed arm 38, with the free end of which the lower end of a vertical rod 39 is connected is, which at its upper portion above the bottom 11 of the frame 10 is a foot lever or a pedal 40 carries. If in such an arrangement the foot lever 40 is shown in FIG in the unactuated position, the lift remains blocked. By depressing the foot lever 40 the arms 32 are moved apart and the brake shoes 31 out of contact with the brake cylinder brought; under this condition the lift can be operated with only very little by the operator applied force are moved up or down.

Fig. 6 shows the system of engagement and sliding of the guides 12 on rails 50 which are vertically attached to the structure 51 are attached on which to mount the lift is. Two studs 60, preferably made of nylon, an upper one and a lower one, are attached to each guide bracket 12 mounted. An axle 61 passes through each roller 60, the ends of which are in the side legs the guide support profile 12 are attached; in addition, each roller has 60 in its side faces

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central recesses for receiving bearings 62 and plugs or pins 63, which are also preferably made of nylon. A groove provided in the peripheral surface of each roller 60 fits the rail 50, which in the illustrated embodiment is of rectangular tubular shape in section, with in its the structure 51 facing surface is provided a longitudinal groove. The bodies are through this longitudinal groove of bolts or through bolts 52 with nuts, with which the rail 50 is attached to the structure 51 is passed through so that they can slide in it.

At the upper end of one of the guide beams 12, the end of a rope 70 is attached (see Fig. 1), which, after it has been mounted on a not shown, at the upper end of the structure 51, suitable pulley has run, attached at its other end to a counterweight 80 (see FIGS. 7 and 8) outside the range of movement of the platform in the shaft or tower is.

In order to compensate for the counterweight of the rope during the movement of the lift and the counterweight

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29A5002

To create weight 80, a second rope 71 is provided (see FIGS. 1, 7 and 8), one end of which is at the lower end of the same guide beam 12 of the platform and the other end of which is attached to the underside of the counterweight 80, whereby it is via a Guide pulley, not shown, which is mounted on the base of the structure 51, runs.

The counterweight 80 comprises, as shown in FIGS. 7 and 8, a vertical plate 81, on the inner surface of which there are two horizontal transversely extending plates 82 are attached, each of which has a pair of rollers 83 whose structure is identical to that of the rollers 60. The two pairs of rollers 83 move on one the rails 50 the same rail 90, but outside the range of movement of the platform with a Spacer 91 and bolts or through bolts are vertically attached to structure 51 with nut 92 is (see Fig. 9).

The plate 81 of the counterweight 80 has at its lower part a horizontal, forward-facing Table 85, which carries a vertical rod 86, which extends parallel to the area of the upper rollers 83

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extends to the plate 81. On the table 85, U-shaped slide weights 100 rest in their base bars have a central bore 101 through which the rod 86 passes. Smaller weights 110 are arranged on the weights 100. These smaller weights 110 also have a central bore 111 through which the rod 86 passes. These smaller weights 110 are also used on the lift used to accurately adjust the balance between the counterweight 80 and the whole from platform and platform users to allow.

On the weights 100 and 110 is a holder 88 slidable along the rod 86 and the plate 81 provided to ensure secure positioning of the upper portion of the rod 86.

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Claims (10)

y. 9f, s [ι η Ivan Roque Gonzales Grazia, Ricardo Negrao Filho Street N. ι 80000 Curitiba - PR -, Brazil Lifting platform for use in metal construction, in shafts, towers and similar constructions claims 1. Lift or platform that can be raised and lowered to use in metal construction, shafts, towers and similar constructions that allow one or move several people up and down, characterized by a metal frame (10) of substantially parallelopipedal shape with an upper base (11) for carrying the user and externally mounted, opposing guide devices (60) the latter are slidably fitted on a pair of respective rails (50) which vertically along the extension of the fixed structure (5D on which the platform or lifting platform mounted, with one end to the upper portion of the lift or platform 030022/0619 - 2 - a support rope made of steel wire (70) and at its lower portion one end of a weight compensation steel rope (71) is attached and these ropes (70 or 7D each have an upper, at the upper end the fixed structure (51) mounted pulley or via a lower one at the base of this structure (5D attached pulley are guided, with their other ends on a weight-adjustable Counterweight (80) are attached, which is vertically attached to this structure (51) along a The rail (90) is slidable and it is held at various points on the structure (51) User allowed to use the platform or lift simply by sliding his or her up or down Body to move, further characterized by an on the frame (10) below the bottom (11) horizontal, freely rotatable and normally constantly against the Rotation by brake shoes (3D blocked cylinder (20), which can only be activated by actuating a foot lever (40) can be released from the blockage by the user and that of two or three turns of one Braking steel cable (26) is wrapped, the vertical - 3 - 030022/061 9 ? ? A ⁵ SOO and is stretched parallel to the direction of movement of the platform or lifting platform and its top or lower end is attached to the upper end or to the base of the structure (51), so that the Cylinder (20) during the upward or downward movement of the lift to rotate about its own axis (21) and is forced along the brake cable (26). 2. Lifting platform or platform according to claim 1, characterized in that the guide devices consist of two pairs of cylindrical lobes (60), preferably made of nylon, which are horizontal and rotatably mounted on two opposite sides of the frame (10) that each of the rollers (60) a circumferential, central recess for receiving the corresponding rail (50) and to the Side surfaces two axial recesses for receiving two roller bearings (62) and two outer ones Pin (63), also preferably made of nylon, has, wherein the pin (63) and the rollers (60) themselves are pierced in the middle, so that the fixed axis (61) supporting the arrangement can be passed through. - 4 030022/06 19 3. Lift or platform according to claim 2, characterized in that each pair of rollers (60) on one long vertical support (12) is attached, which on one side of the frame (10) upwards and Is mounted protruding below it that the four rollers (60) are near the ends of the are opposite pairs of supports (12) and that the attachment of the support cable (70) and of the weight compensation rope (71) on the frame (10) at one of the ends of one of these carriers (12) is made. 4. Lifting platform or platform according to claim 3, characterized in that each of the carriers (12) consists of consists of a U-shaped metal profile bar, the side legs are turned outwards and in their Carry a pair of rollers (60) inside. 5. Lifting platform or platform according to one of claims 1 to 4, characterized in that the counterweight (80) a vertical flat plate (81) and a horizontal one attached to the outer surface thereof Table (85) includes for receiving main - 5 030022/0619 2 '· .:: b ü 0 weights (100) and additional weights (110) and that on the inner surface of the plate (81) and near at each of its ends a pair of rollers (83), preferably made of nylon, horizontally and towards each other are arranged in parallel, between which a rail (90) runs. 6. Lifting platform or platform according to claim 5, characterized in that the rollers (83) have a circumferential central recess for engagement with the rail (90) and two axial recesses on its side surfaces for receiving roller bearings and journals, also preferably made of nylon, and that in each case one axis fastened at one end perpendicularly to the plate (81), each roller (83) happened in their longitudinal direction. 7. lifting platform or platform according to claim 5 or 6, characterized in that the weights (100, 110) have a central hole through which one with its lower end on the table (85) and attached at its upper portion by a slide holder (88) to the base plate (81) -G- 030022/0619 Rod (86) fits. 8. Lifting platform or platform according to one of claims 1 to 7, characterized in that the brake shoes (3D connected at their rear with a pair of vertical arms (32) which are in relation to facing the cylinder (20), at their upper portion below the bottom (11) are connected to the frame (10) and are tensioned against one another at their lower section by a spring (33) are, this spring (33) is dimensioned such that the brake shoes (31) on the cylinder (20) are pressed to block it, and that the lower ends of the arms (32) of the spreading action a pair of eccentrics (37) mounted on a shaft (34), the shaft (34) by pivoting a vertical rod (39) that supports the foot lever (40) connected, radial arm (38) is rotatable. 9. lifting platform or platform according to claim 8, characterized in that the eccentric roller bearing (37) are diametrically opposed to each other and - 7 030022/0619 2 q Α ^γ ϊ Ο Ο 2 mounted in a symmetrical arrangement between two washers (36) fastened on the shaft (34) are, and the lower ends of the arms (32) between the discs (36) and outside the "Roller bearings (37) are located. 10. Lifting platform or platform according to one of claims 1 to 9, characterized in that the rails (50, 90) are hollow profile rods rectangular in section, whose for attachment to the structure (51) certain surface is provided with a central longitudinal groove through which the body of the fastening bolts or the through-bolts (52) passes . 030022/0619