DE202011110120U1 - Hoist for moving a junction box - Google Patents

Abstract

Hoist for moving a box, comprising a support frame (1), a suspension (2) connected to the support frame (1) for connecting the hoist to a construction machine, at least two gripping members (3, 4) with gripping (5, 6), wherein the gripping members (3, 4) on the support frame (1) are arranged and wherein at least one gripping member (3) is designed to be movable and wherein the gripping ends (5, 6) for detecting the Verbaubox are facing away from each other, and at least one, on the movable gripping members (3, 4) acting actuator (7), characterized in that at least one gripping member (3) is designed to be displaceable.

Description

The present invention relates to a hoist for moving a Verbaubox comprising a support frame, a suspension connected to the support frame for connecting the hoist to a construction machine, at least two grasping having gripping members, wherein the gripping members are arranged on the support frame and wherein at least one gripping member movable is formed and wherein the gripping ends for detecting the Verbaubox are facing away from each other, and at least one, acting on the movable gripping members actuator. The invention thus relates to a hoist in the manner of an internal gripper.

A Verbaubox within the meaning of the invention is a mobile formwork unit with two predominantly parallel, adjustable by means of adjusting walls for insertion into excavated ditches, pits or shafts to prevent slipping or collapsing the adjacent soil, or generally the wall material. Such formwork units are widely used in civil engineering and usually have at the upper corners of their walls load eyes for transporting the Verbaubox. To implement it requires due to the weight of Verbauboxen a resilient connection to a construction machine, such as an excavator or a crane. As a hoist this steel chains or ropes are usually equipped with karabiners or hooks used, with a hooking and unplugging the carabiners or hooks on the eye loops is accomplished manually by an operator. During these operations, this operator is in a dangerous and accident-prone work environment. In this respect, it is desirable that the detection and release of a Verbaubox or other Tiefbauteilen or construction helmets is automated.

This requires an improved hoist. In the field of manhole ring grippers, devices are known, for example, which enable the detection, the pendulum-free transport and the targeted settling of manhole rings and sometimes even manhole cones without direct manual access. The applicant has already in the patent EP 0 703 184 B1 a manhole ring with the above advantages described. A spreader built by the applicant was subsequently in the document GB 2 429 966 A described, with the seemingly autonomous mechanism for detecting, transporting and settling of manhole rings and manhole cones works only insufficient. A hoist, which would meet the requirements for the automated detection, implementation and release of Verbauboxen optimally and thus would make a dangerous manual access by an operator superfluous, is not yet known.

The present invention is therefore based on the object to provide a hoist for the safe detection, implementation and release of a Verbaubox.

To solve the device task, the invention proposes a hoist of the type mentioned, wherein at least one gripping member is designed to be displaceable. With great advantage, the combination of features according to the invention allows an actuator-driven adjustment of the distance of the gripping ends, wherein the displacement of the at least one gripping member allows an exactly right-angled passing the load eye of a Verbaubox with the respective gripping end. Pivoting movements, in which the gripper ends move on a curved trajectory and the gripping ends and the load eyes are often skewed, can be avoided with advantage. As a result, material fatigue in hoist and Verbaubox occurs much later, resulting in extended service life.

In a retracted state of the hoist, the distance of the gripping ends is less than a clear distance from two opposite load eyes the Verbaubox, whereby the gripping ends can be placed between the eye loops. After placing the actuator by moving one or more gripping members increases the distance between the gripping ends to each other until the gripping ends engage in the eye loops. Upon reaching a suitable depth of engagement of the actuator is manually stopped by the operator of the construction machine or automatically by means of a mechanical or optical sensor in the manner of a limit switch. The Verbaubox is now recorded and can be implemented. During lifting, relocating and lowering, the junction box is supported on only two upper, opposite corners of the walls. Due to this two-point suspension, the hoist according to the invention is suitable with great advantage to implement Verbauboxen different lengths. To release the Verbaubox again, the actuator reduces the distance of the gripping ends to each other by moving one or more gripping members to each other until the gripping ends have a smaller distance than the clearance of the opposing eye loops. Since the detection and release of the Verbaubox is effected automatically by means of the actuator, a manual access by an operator is not required.

As being particularly advantageous according to the invention, it proves that the support frame has an open profile. The gripping members must necessarily at least partially outside of the support frame be arranged to allow a contact between the gripping end and the Verbaubox. However, this allows an open profile, the protected arrangement of the actuator within the profile of the support frame, which significantly extends the life of the actuator in view of the harsh environmental conditions of a civil engineering office. The basic geometry of the support frame extending in a horizontal plane can be embodied differently according to the invention, for example linear, triangular, rectangular, square, circular, elliptical or star-shaped. A contact in the sense of the invention can take place both positively and non-positively, for example, by intervention, reaching under, enforcement, snapping, hooking, clamping, wedging, distortion or fixed eyes, for reasons of simplicity of construction, all contact types are preferred by a linear movement of the gripping ends are realized.

In an advantageous embodiment of the invention it is provided that the support frame is formed as a linear support rail. This simple design is structurally simple, with little effort and therefore inexpensive to produce, meeting the basic requirements in terms of geometry.

With great advantage, the invention provides that the support frame comprises a steel double-T-carrier as a support rail. Such a standard carrier profile is rigid, durable and ubiquitous in metal trading and thus readily available, its processing for the production of the hoist according to the invention requires no special work processes or techniques, whereby the production of the hoist can be performed by any experienced metal workers.

Furthermore, it proves to be particularly advantageous according to the invention that the support frame is wider than a maximum clear width of Verbaubox. Thus, the support frame can always be placed on the upper edges of the walls of Verbaubox when entering the Verbaubox and must not be kept floating. At the same time the travel of the gripping members is not limited by the length of the support frame. In the hoist according to the invention, the vertical distance from a lower edge of the support frame to the longitudinal axis of the gripper ends is just chosen to correspond to the distance from the upper edges of the walls and the centers of the lifting lugs. Once the support frame rests flush on the upper edges of the walls, it is ensured according to the invention with great advantage that suitable for detecting vertical positioning of the gripper ends relative to the eyebolts, without the operator would still be active or control the position of the parts to each other.

In a preferred embodiment of the invention, the gripping members are slidably mounted, wherein the gripping members and / or the support frame have lubricant. The required displaceability of the gripping members relative to the support frame can be structurally particularly simple and very effective realize by means of corresponding sliding surfaces, since the sliding distances are short and the sliding speeds are low and the sliding of the gripping members takes place exclusively load-free. Apparatively more complex devices, such as rollers mounted on trolleys of construction cranes, are superfluous and would unnecessarily reduce the high robustness of the hoist according to the invention against mechanically acting disturbing influences. As lubricants are exemplary brass or steel plates, also surface-treated, ceramic sliding plates, slide plates made of graphite or hard plastics and called grease-like lubricants, without wishing to limit the invention to these lubricants.

As being particularly advantageous according to the invention, it proves to be that the gripping members are designed to surround the support frame designed as a linear support rail in a manner encompassing the circumference. This unintentional unhooking the gripping members of the support rail is impossible, which is associated with a significantly reduced risk of accidents and significantly increases the reliability of the device according to the invention.

In view of the fact that as the hoist carrying construction machine mostly a caterpillar, wheeled or walking excavator is used, which has hydraulic connections at one working end of its boom, is provided according to the invention with great advantage that the actuator as a fluid cylinder, in particular hydraulic cylinder is formed , Thus, the actuator requires no independent energy supply, but can be easily connected via one or more couplings to the on-board hydraulics of the construction machine. Due to the inventive arrangement of actuator, gripping members and support frame, the weight of the Verbaubox when lifting by the gripping members is transmitted directly and exclusively to the stable support frame. The actuator is only used to move the gripping members in an unloaded state and thus is completely independent of the load to be lifted dimensioned.

It proves to be particularly advantageous according to the invention that an actuator is designed to be in operative connection with a gripping member. This one-to-one equipment of the hoist allows a differentiated control and operation of each individual gripping member, which can be particularly advantageous when detecting oblique Verbauboxen. The actuation of the actuators via the control of the on-board hydraulics. Thus, that allows Hoist according to the invention both an independent and a synchronous retraction and extension of the actuators, in the latter case, the gripping members are always arranged symmetrically to a center of the support frame, which acts on the suspension. In other words, the gripping members perform a center movement.

In a preferred embodiment of the invention, in which the support frame is formed as a linear support rail, the hoist comprises two actuators and two gripping members, wherein an actuator on one end of the support frame and a, the other end of the support frame facing the gripping member is acting and the another actuator on the other end of the support frame and the other, the one end of the support frame facing the gripping member is formed acting. Different formulated, the actuators are oriented counter to each other and operate from them from more remote gripping organ. This special arrangement allows large sliding distances in relation to a width of the mounting rail and thus to a total width of the hoist. In a completely retracted state, the grippers are close together so that they can be lowered without difficult navigation between the walls of the junction box. In order to be able to lift with the same hoist Verbfachoxen, which have a large clear width, so require a far extended or spread state to engage the gripper ends in the eye loops, it requires a large sliding distance, which is provided with great advantage of the invention, because the entire piston lengths of both actuators are available for the spreading apart of the gripper ends in the manner of an internal gripper.

It proves to be particularly advantageous according to the invention that the hoist is designed according to one of the device claims. With the aid of the hoist according to the invention, all steps for the safe detection, implementation and release of a Verbaubox of the cab of the construction machine can be carried out without having to leave this protective environment. In this respect, by stopping the operator in the immediate danger area near the Verbaubox provoked accidents are excluded.

The invention will be described by way of example in a preferred embodiment with reference to a drawing, wherein further advantageous details are shown in the figures of the drawing.

The figures of the drawing show in detail:

1 a schematic front view of the hoist according to the invention,

2 a schematic side view of the hoist according to the invention and

3 a schematic plan view of the hoist according to the invention.

In 1 the hoist according to the invention is shown in a schematic front view, wherein it rests on the upper edges of the walls of Verbaubox. It comprises a support frame designed as a linear double-T steel beam 1 , one with the support frame 1 welded suspension 2 , two, grasping 5 . 6 having gripping organs 3 . 4 and two actuators 7 . 8th , The suspension 2 consists essentially of a foot and a flat stop plate with holes for receiving screws or bolts. It serves as a connection device for connecting the hoist with an excavator or the like. In 1 not shown are the hydraulic lines from the actuators 7 . 8th to the hydraulic connections at the working end of the boom of the excavator, wherein the connection via not shown hydraulic connections in the suspension 2 is successful. The gripping organs 3 . 4 each have an upper boundary plate, a lower boundary plate and two lateral boundary plates. The boundary plates are between 1.0 cm and 3.0 cm, in particular 2.0 cm, thick and made of a steel. At the lower boundary plate is via a spacer the respective gripping end 5 respectively 6 of the gripping member 3 . 4 screwed or welded. The grasping 5 . 6 are substantially cylindrical in shape with a length of 10 cm to 25 cm and a diameter of 3.0 cm to 6.0 cm, consist of a material resistant to mechanical bending and friction loads, in particular of steel, and can securing means against unintentional Have loosening of the load eyes. According to the invention, for example, that the gripping ends 5 . 6 slightly in the direction of the support frame 1 are oriented or that engaging ends of the grasping 5 . 6 bent upwards or the engaging ends have a thickening to allow a safe, slip-free engagement and lifting. For a facilitated intervention in the load eyes, the gripping 5 . 6 be conically tapered towards their engaging ends, in the manner of a Einfädelspitze. The boundary plates of a gripping organ 3 respectively 4 are welded or bolted together. The lateral boundary plates are configured to be curved so as to abut flush with each other near the lower limit plate to maximize pinch of the grasping ends 5 . 6 to allow and at the same time close to the upper boundary plate to provide sufficient clearance to a central placement of the foot of the suspension 2 on the support frame 1 to enable. The grasping 5 . 6 are turned away from each other thus orientate and form an inner gripper, which in the in 1 State shown with the eyebolts Verbaubaubox is not engaged, the Verbaubox thus not detected. To capture the Verbaubox are the gripping organs 3 . 4 slidable and sliding on the support frame 1 stored to an outward movement of the grasping 5 . 6 to allow intervention in the load eyes. To improve the lubricity are the gripping organs 3 . 4 on a lower side of the upper restricting plate and on an upper side of the lower restricting plate with lubricants 9 stocked. These are ground, polished and possibly greased brass plates with a thickness of about 1.0 cm. The actuators 7 . 8th in the form of hydraulic cylinders act on the support frame 1 and the gripping organs 5 . 6 where an actuator 7 with one end 10 of the supporting frame 1 and with one, the other end 11 of the supporting frame 1 facing gripping organ 4 connected by screws and the other actuator 8th with the other end 11 of the supporting frame 1 and with the other, the one end 10 of the supporting frame 1 facing gripping organ 3 is connected by screws. The screws have a diameter between 2.0 cm and 4.0 cm, in particular 3.0 cm. The connections are realized by means of securing pins secured steel bolts, so that a release of the connections, for example, for the replacement of components, at any time. The actuators 7 . 8th thus set the distance of the gripping ends 5 . 6 without the need for direct manual access by an operator. In a preferred dimensioning of the hoist has designed as a support rail support frame 1 a length of 200 cm, the grasping 5 . 6 are at maximum constriction 50 cm apart and a maximum stroke per actuator 7 respectively 8th is 70 cm. Thus Verbauboxen can be detected and implemented with a clear width of 50 cm to about 180 cm.

2 shows the hoist according to the invention in a schematic side view. The gripping organs 3 . 4 grasp the support frame 1 cross-section circumferentially, whereby their mobility in a spatial direction, namely along the linear support frame 1 , is reduced. One of the gripping organs 3 . 4 formed inner shape for enclosing the support frame 1 can be angular or roundish according to the invention, fit, with sliding clearance or relatively loose. There is an actuator in each of the two open profile sides of the double-T steel girder 7 respectively 8th arranged. This is due to the asymmetrical introduction of force by the actuators 7 respectively 8th generated torque, which at the gripping organs 3 respectively 4 attacks, is negligible, since a displacement of the gripping organs 3 . 4 only takes place in a no-load condition, so that when moving the gripping organs 3 . 4 a possible tilting does not occur. Also contributes to a tight sliding game between the gripping organs 3 . 4 and the support frame 1 at. Much of the flexural rigidity of the hoist is provided by the bridge of the double T-beam. Also in 2 the hoist is resting on the junction box. The Verbaubox has at its vertically extending inner edges reinforcing elements on which attack the adjustment and at the upper ends of the load eyes for lifting the Verbaubox are arranged. The spacer between the lower boundary plate of the gripping member 3 respectively 4 is chosen such that when resting the hoist on the upper edges of the walls of Verbaubox the gripping end 5 respectively 6 is arranged just at the same height to a center of the corresponding load eye. Once the support frame rests on the upper edges of the walls, it is ensured according to the invention with great advantage that a suitable for engaging in the eyelets vertical positioning of the gripping ends 5 . 6 consists.

In 3 is the hoist according to the invention in a schematic plan view with omission of the actuators 7 . 8th shown. Analogous to 1 here is seen that the support frame 1 wider than the clear width of Verbaubox is formed. Thus, the support frame 1 when detecting the Verbaubox be placed particularly advantageous on the upper edges of the walls of the Verbaubox so that more than an adjustment of the position of the hoist along the upper edges of the walls of the Verbaubox is necessary to have an optimal position for detecting. It is also easy to see that the gripping organs 3 . 4 in its rest position close to the suspension 2 lie and on the support frame 1 sliding outwards from the suspension 2 Moved away to a working position and moved back again centric. The travel path of the gripping organs 3 . 4 is limited by the fact that the gripping organs 5 . 6 with their respective, under the support frame 1 abutting end face of the gripping end suspension to the wall of a load eye box the Verbaubox. The maximum penetration depth of the respective gripper ends 5 . 6 in the respective load eye Verbaubox is thus through the upper free length of the gripping ends 5 . 6 limited between engaging end and front side of the gripping end suspension. The grasping 5 . 6 end in this embodiment with great advantage within the surface area of the upper boundary plate of the respective gripping member 3 . 4 , In other words, the engaging ends of the gripping ends 5 . 6 into which the load of the attached junction box is introduced, just below that by the size of the upper lubricant 9 stretched surface. This has the advantage that the forces of the raised Verbaubox within the area of the gripping organs 3 . 4 in the support frame 1 be initiated. This results in a particularly resilient and stable hoist. Torques are avoided, the further force is applied over the entire surface over the lubricants 9 , The lubricants 9 are fastened by means of countersunk screws or rivets to the respective limiting plates and formed in several parts in order to replace only the actually worn parts in an inhomogeneous wear pattern. To replace the lubricants 9 becomes the respective gliding organ 3 . 4 with the respective actuator 7 . 8th connecting screw loosened and pulled. Now the dissolved go will be 3 . 4 about the respective free end 10 . 11 of the supporting frame 1 deducted from this. After stripping, the lubricants 9 freely accessible and can be easily exchanged. The flat stop plate of the suspension 2 is rounded and includes various holes for connecting with construction machinery. Thus, the hoist according to the invention is compatible with a variety of construction machinery.

According to the invention, with this device only two of the four load eyes of a Verbaubox to lift to grab. Although this leads to a double grasping per lifting operation, until the Verbaubox is again aligned parallel to the ground, but this is easily possible because slipping wall material forms a support surface for settling the raised Verbauboxseite. As a result, the device according to the invention can advantageously be kept structurally simple and a length adjustment device for adapting a quasi-double hoist according to the invention can be dispensed with.

LIST OF REFERENCE NUMBERS

1

supporting frame

2

suspension

3

gripping member

4

gripping member

5

cross

6

cross

7

actuator

8th

actuator

9

lubricant

10

The End

11

The End

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0703184 B1 [0003]
• GB 2429966 A [0003]

Claims (10)

Lifting device for moving a junction box, comprising a support frame ( 1 ), one with the support frame ( 1 ) connected suspension ( 2 ) for connecting the hoist to a construction machine, at least two gripping ends ( 5 . 6 ) having gripping organs ( 3 . 4 ), whereby the gripping organs ( 3 . 4 ) on the support frame ( 1 ) and at least one gripping member ( 3 ) is movable and wherein the gripping ends ( 5 . 6 ) for detecting the Verbaubox are facing away from each other, and at least one, on the movable gripping members ( 3 . 4 ) acting actuator ( 7 ), characterized in that at least one gripping member ( 3 ) is designed to be displaceable. Hoist according to claim 1, characterized in that the support frame ( 1 ) has an open profile. Hoist according to claim 1 or 2, characterized in that the support frame ( 1 ) is formed as a linear support rail. Hoist according to one of the preceding claims, characterized in that the supporting frame ( 1 ) comprises a steel double-T carrier. Hoist according to one of the preceding claims, characterized in that the supporting frame ( 1 ) wider than a maximum clear width of Verbaubox is formed. Hoist according to one of the preceding claims, characterized in that the gripping members ( 3 . 4 ) are slidably mounted, wherein the gripping members ( 3 . 4 ) and / or the support frame ( 1 ) Lubricant ( 9 ) exhibit. Hoist according to claim 3, characterized in that the gripping organs ( 3 . 4 ) the support frame ( 1 ) are formed bordering enclosing. Hoist according to one of the preceding claims, characterized in that the actuator ( 7 ) is designed as a fluid cylinder, in particular hydraulic cylinder. Hoist according to one of the preceding claims, characterized in that an actuator ( 7 ) with a gripping member ( 3 ) is formed in operative connection standing. Hoist according to claim 3, characterized in that the hoist has two actuators ( 7 . 8th ) and two gripping organs ( 3 . 4 ), wherein an actuator ( 7 ) to an end ( 10 ) of the supporting frame ( 1 ) and one, the other end ( 11 ) of the supporting frame ( 1 ) facing gripping member ( 4 ) is acting and the other actuator ( 8th ) to the other end ( 11 ) of the supporting frame ( 1 ) and the other, one end ( 10 ) of the supporting frame ( 1 ) facing gripping member ( 3 ) is formed acting.

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