DE102019207108A1 - Holding device for tubular body and method for holding a tubular body - Google Patents

Abstract

The invention relates to a holding device (1) for tubular bodies (11), comprising:
- at least one first wedge (2a),
- an expansion element (8),
- a threaded body (5),
- a support element (3),
- An actuating element (4), the expansion element (8) or the at least one first wedge (2a) interacting with a thread (6) of the threaded body (5) in such a way that a rotation of the threaded body (5) causes a relative movement between the causes at least one first wedge (2a) and the expansion element (8), the expansion element (8) expanding in a relative movement between the at least one first wedge (2a) and the expansion element (8) in a first direction and expanding in an a second direction relative movement between the at least one first wedge (2a) and the expansion element (8) contracts or a contraction of the expansion element (8) is released, and a method for holding a tubular body (11).

Description

The invention relates to a holding device for tubular bodies and a method for holding a tubular body.

In particular when manufacturing and / or processing and / or processing tubular bodies, it may be necessary to hold them in a desired position and / or with a desired orientation. For example, the tubular bodies can be held when they are to be coated from the outside. Such a coating can for example have epoxy powder and / or an adhesion promoter and / or a polyolefin, for example polyethylene or polypropylene. Such a coating can serve, for example, for the purpose of corrosion protection and / or temperature resistance and / or resistance to weather conditions.

As an alternative or in addition, there are further situations in the production and / or machining and / or processing of tubular bodies, which may require holding the tubular bodies. Holding may be necessary, for example, for the purpose of moving, for example when a tubular body is being brought from one processing device to another processing device. Holding may also be necessary, for example, while a coating applied to the tubular body is drying and / or while the tubular body is deformed, for example bent, and / or during a heat treatment.

In addition to manufacturing and / or machining and / or processing, there are further situations in which tubular bodies can be held, for example for the purpose of storage and / or transport and / or material testing and / or installation.

In particular, it may be necessary for holding to be carried out in an automated manner, for example with the aid of a positioning device, in particular a robot. In such holding processes, tubular bodies are gripped from the outside, for example with the aid of clamp-like gripping devices.

It is an object of the invention to provide a simple holding device and a method for holding a tubular body in order to hold tubular bodies reliably. In particular, the holding of tubular bodies is to be simplified during production and / or machining and / or processing of the tubular bodies, in particular for or during coating processes (s) of tubular bodies, in particular of outer surfaces of the tubular body.

The solution to this technical problem results from the subjects with the features of the independent claims. Further advantageous configurations of the invention emerge from the subclaims.

According to a basic idea of the invention, a holding device is to be proposed in particular, which enables reliable holding, in particular vertical holding, of a tubular body on an inner surface of the tubular body, so that an outer surface is exposed, in particular completely exposed, i.e. freely accessible. This makes it possible, in particular, to process the outer surface in all areas, for example to coat it, without having to change a holding position of the holding device. The invention also enables such a vertically held tubular body to be transported, e.g. B. for hanging in a processing system, e.g. B. a coating system.

Vertical holding is to be understood here as holding in which a longitudinal axis of the tubular body is oriented in the direction of the earth's gravity field, that is to say in particular parallel to the direction of gravity. If, for example, the tubular body is a pipe, the longitudinal axis of the tubular body is the central axis of the pipe cross-section.

• - mindestens einen ersten Keil,
• - ein Spreizelement,
• - einen Gewindekörper,
• - ein Abstützelement,
• - ein Betätigungselement,

wobei das Spreizelement oder der mindestens eine erste Keil mit einem Gewinde des Gewindekörpers derart in Wechselwirkung steht, dass eine Drehung des Gewindekörpers eine Relativbewegung zwischen dem mindestens einen ersten Keil und dem Spreizelement bewirkt, wobei das Spreizelement bei einer in einer ersten Richtung verlaufenden Relativbewegung zwischen dem mindestens einen ersten Keil und dem Spreizelement aufspreizt und bei einer in einer zweiten Richtung verlaufenden Relativbewegung zwischen dem mindestens einen ersten Keil und dem Spreizelement sich zusammenzieht oder das Zusammenziehen des Spreizelements freigibt. Dass ein Zusammenziehen freigegeben wird kann bedeuten, dass das Zusammenziehen, also z.B. eine Verringerung des Durchmessers des Spreizelements, ermöglicht wird. Es ist möglich, aber nicht zwingend, dass das Zusammenziehen durch diese Relativbewegung bewirkt wird. So kann das Zusammenzlehen z.B. im freigegebenen Zustand durch eine weitere Kraft bewirkt werden.In particular, it is proposed: a holding device for tubular bodies, comprising:

• - at least one first wedge,
• - an expansion element,
• - a threaded body,
• - a support element,
• - an actuator,

wherein the expansion element or the at least one first wedge interacts with a thread of the threaded body in such a way that a rotation of the threaded body causes a relative movement between the at least one first wedge and the expansion element, the expansion element in a relative movement extending in a first direction between the at least one first wedge and the spreading element spreads and, when there is a relative movement between the at least one first wedge and the spreading element, contracts or releases the contraction of the spreading element. The fact that a contraction is released can mean that the contraction, for example a reduction in the diameter of the expansion element, is made possible. It is possible, but not mandatory, that the contraction is brought about by this relative movement. So can it For example, in the released state, they can be brought together by another force.

The holding device can in particular have a longitudinal axis. This longitudinal axis can in particular run parallel, in particular collinear, with a longitudinal axis of the at least one first wedge, a longitudinal axis of the expansion element, a longitudinal axis of the threaded body, a longitudinal axis of the support element and a longitudinal axis of the actuating element. The holding device can also have at least one further wedge, the longitudinal axis of which can also run parallel, in particular collinear, with the longitudinal axis of the holding device. The longitudinal axis of the holding device can in particular also run parallel, in particular collinear, with the longitudinal axis of the tubular body when the tubular body is held.

Spreading open and contracting the spreading element consists in particular in a change in the shape and at least one dimension of the spreading element. In particular, “spreading out” means that the diameter of the spreading element increases transversely to the longitudinal axis of the spreading element. This can mean in particular that the distance from at least part of the expansion element, for example an expansion part, to the longitudinal axis of the expansion part increases. The part of the expansion element can have or form a contact point or section for mechanical contacting of the tubular body, in particular of its inner surface. As a result, the expansion element can press in particular against an inner wall of a tubular body, whereby the tubular body is held. In such a held state, the longitudinal axis of the tubular body can be parallel, in particular collinear, in particular with the longitudinal axis of the expansion element and in particular with the longitudinal axis of the holding device. In particular, “pull together” means that the diameter of the expansion element decreases transversely to the longitudinal axis of the expansion element. When contracting, the expansion element can detach itself from the inner wall of the tubular body, whereby the tubular body is released.

The first wedge and the expansion element can be arranged and / or designed in such a way that the first wedge and the expansion element contact, in particular can touch. The first wedge and the expansion element can also be arranged and / or designed in such a way that the first wedge and the expansion element are mechanically connected or connectable. A mechanical connection within the meaning of this invention can be a rigid connection, in particular a rotationally fixed connection. The connection can also be a releasable connection, with a rigid connection also being able to be a releasable connection.

The connection can also enable a relative movement, for example by touching along a contact surface between two different parts.

The first wedge and the expansion element can also be in contact with one another via a further part. Such a further part can alternatively or additionally be, for example, a sliding element which is arranged between the at least one first wedge and the spreading element and is designed to allow relative movements between the at least one first wedge and the spreading element by sliding. A relative movement between the first wedge and the expansion element can at least partially include a movement of the expansion element, in particular the center of gravity of the expansion element, linearly along the longitudinal axis of the at least one first wedge. The relative movement can also at least partially include a relative movement of the first wedge, in particular a center of gravity of the first wedge, along a longitudinal axis of the expansion element.

In particular, the expansion element can slide along the at least one first wedge or vice versa. Sliding can in particular take place along a contact surface (s) which is / are located on the expansion element and / or the at least one first wedge.

It is possible that the first wedge is arranged in a cavity formed by the expansion element and / or can move into and / or out of this cavity. A diameter of the cavity can decrease in a direction along the longitudinal axis of the expansion element, in particular in a direction oriented from an end face of the expansion element towards the center point of the expansion element.

Furthermore, in particular, the expansion element can be changed in shape and / or in dimension by the at least one first wedge, in particular in a direction which is transverse to the longitudinal direction of the thread of the threaded body. If the at least one first wedge has, for example, spreading parts arranged around the longitudinal axis of the spreading element, these spreading parts are in particular pressed apart, the diameter of the spreading element is increased.

A relative movement, in particular along a first direction, between the spreading element and the at least one first wedge can then lead to spreading of the spreading element. A relative movement, in particular along a direction opposite to the first direction, between the expansion element and the at least one first wedge can then on the one hand Lead contraction of the expansion element or release such a contraction. The relative movement between the at least one first wedge and the expansion element in the first direction can in particular be caused by a rotation of the threaded body in a first direction of rotation, the relative movement between the at least one first wedge and the expansion element in the further direction opposite to the first direction in particular caused by a rotation of the threaded body in a second direction of rotation, which is opposite to the first direction of rotation. The rotation of the threaded body, which can occur in particular due to an externally applied torque, can thus, depending on the direction, cause the expansion element to expand or contract or to enable a contraction.

Furthermore, the first direction can be oriented parallel to the longitudinal axis of the at least one first wedge and parallel to the longitudinal axis of the expansion element. The movement along the first direction can in particular be moving the at least one first wedge and the expansion element towards one another parallel to the parallel, in particular collinear, longitudinal axes. The movement along the further direction can in particular be a linear moving away from one another of the at least one first wedge and the expansion element parallel to the parallel, in particular collinear, longitudinal axes. Such a relative movement can cause the tubular body to be released from the holding device by a contraction of the expansion element that is made possible or caused by this, for example in order to remove it or to move it, while it can be held - with less force . The relative movement can in particular be a linear movement.

The pipe body can in particular be any type of pipe, for example a drain pipe, part of a pipeline, a structural element in mechanical engineering, for example a hollow axle or a hollow shaft, a holding element, for example an element of a lattice frame such as scaffolding, and / or a semi-finished product. The pipe body can be made of any material, for example steel, cast iron, copper, brass, nickel alloys, titanium alloys, aluminum alloys, a combination of glass and metal, a combination of plastic and metal, plastic, concrete, reinforced concrete, synthetic resin concrete , Fiber cement, ceramic, glass, GRP, wood, basalt, clay, earthenware, or any other material. For example, it can comprise any of the materials enumerated. Alternatively or additionally, it can comprise any other material. Alternatively or additionally, the tubular body can in particular be any body that has at least partially a tubular part or a tubular section, for example a connection element, a pipe bend, a pipe distributor or a diverter valve or a container with a tubular inlet and / or outlet.

The at least one first wedge can in particular be a part which, in a longitudinal section, has the shape of a triangle and / or a trapezoid, for example a right-angled trapezoid at least partially. A maximum diameter of the first wedge can also taper along its longitudinal axis, in particular in a direction towards the expansion element or its center point. An example of this is that the at least one first wedge is a part that is round in cross section (which can, however, have rectilinear partial areas in cross section, for example contact surfaces) and its diameter extends along the longitudinal axis of the at least one first wedge, which is then the Corresponds to the central axis of the at least one first wedge, reduced in size. The cross-sectional plane can be oriented perpendicular to the central axis.

In particular, the at least one first wedge can have a surface or surface section that is inclined to the longitudinal axis of the at least one first wedge and / or a curved surface or surface section. This surface or this surface section can have or form a contact surface for contacting the spreading element. Alternatively, the at least one first wedge can be any part of any shape, relative to which the expansion element can move.

The at least one first wedge can in particular be designed as a hollow body, wherein the cavity of the hollow body can have an internal thread or can be designed as a through hole or blind hole. In particular, the threaded body or a part thereof and / or the support element or a part thereof can be arranged within the at least one first wedge. Furthermore, the thread of the first wedge can be in engagement with the thread of the threaded body.

The expansion element can in particular be a rigid body, for example an expansion part, which is designed to move its shape and / or dimensions due to a movement relative to the at least one first wedge. Such an expansion part can be, for example, a part which is shaped on an outside in such a way that it can press against an inside surface of a tubular body in a surface section, in particular flush. E.g. the outside can have or form a rounded surface. The expansion element can at least partially have an outer shape of at least part of a cylinder, so that a large contact area results with an inner wall of a tubular body with a circular cross section.

On an inside, it can have a contact surface or a contact area which is configured to slide on the at least one first wedge. In particular, it can be a contact surface which is inclined to the longitudinal axis of the expansion part. A surface inclined to an axis in the context of this invention can here assume an angle between 0 ° (exclusively) and 90 ° (exclusively) with this.

The spreading element can also have more than one rigid body, for example several spreading parts, or be formed by them. The shape and / or dimension of the expansion element formed by this plurality of rigid bodies can change due to the movement relative to the at least one first wedge. The expansion element can in particular be in direct connection with the at least one first wedge, for example on a contact surface and / or in a contact area. Such a spreading element can also have a contact surface oriented obliquely to its longitudinal axis for contacting the first wedge. If only the spreading element or the at least one first wedge has a contact surface, the other of the two parts can then, for example, be movable along the contact surface with only one contact area in contact.

The expansion element can in particular be made hollow. In this case in particular, expansion parts of the expansion element can be arranged along a circumferential direction of a circular arc or part of a circular arc around a central longitudinal axis of the expansion element. When spreading open, a radial distance between the spreading part (s) and this central longitudinal axis can change, in particular increase.

The at least one first wedge can then in particular be designed as a part that is at least partially round about its longitudinal axis, be in contact with several expansion parts and, when viewed in a cross section of the expansion element, be located within the circular arc or the partial circular arc. Furthermore, a central axis of the thread of the threaded body can be arranged in the central axis of the circular arc.

The expansion element can have an anti-slip coating on the outside, for example made of a plastic. The expansion element or an expansion part can be exchangeable, for example to replace a worn expansion element / part and / or to use an expansion element / part with a different external shape, for example suitable for a different type of tubular body. All other parts of the holding device can also be exchangeable.

The expansion element can also be designed in such a way that it itself interacts with a thread of the threaded body. Thus the expansion element itself can have a thread which engages with the thread of the threaded body. A rotation of the thread of the threaded body can lead to a change in shape and / or dimensions of the expansion element. In this case, the at least one first wedge can, in particular, be arranged fixedly with respect to the expansion element. For example, the at least one first wedge can then be firmly connected to the support element.

As already mentioned, the threaded body has a thread. This can in particular interact with the first wedge and / or with the expanding element and / or a further part which is connected to the at least one first wedge and / or the expanding element. The thread can also interact with a further wedge of the holding device, which will be explained in more detail below. The threaded body can in particular have the shape of a rod, in particular a rod that is round in a cross-section transverse to the longitudinal axis of the threaded body, only part of the rod being able to carry a thread. In particular, the threaded body can be arranged on or in the support element so as to be movable relative to the latter and / or be supported by the support element. In a holding state in which a tubular body is held, the longitudinal axis of the thread of the threaded body can be oriented parallel or collinear to the longitudinal axis of the held tubular body or part.

The threaded body can also have several threads, for example two opposing threads on a common pin, the at least one first wedge interacting with one of the two threads and at least one further wedge interacting with the other of the two threads. If the threaded body is rotated, the at least one first wedge and the at least one further wedge can both move relatively towards one another and / or both move relatively away from one another. An expansion element arranged between the at least one first wedge and the at least one further wedge can then be changed in shape and / or dimension when the two wedges are moved relative to one another. An embodiment is also possible in which one of the two wedges interacts with a thread in order to be moved by a rotation of the thread, and the other of the two wedges is stationary, in particular can be firmly connected to the support element, as further below is explained.

A torque that is generated in particular with the help of a motor and on the Threaded body acts, can in particular be a limited and / or controlled torque in order to generate a suitable compressive force on an inner wall of a tubular body.

The first wedge and the threaded body can be mechanically connected, for example in that the threaded body has an external thread and the at least one first wedge has an internal thread which interacts, for example, is in operative engagement with the external thread. Alternatively, the threaded body can have an internal thread, for example, and the at least one first wedge can have an external thread, which interact with one another, for example in operative engagement. In such a case, the at least one first wedge can be moved along its longitudinal axis by the rotation of the threaded body, the longitudinal axis of the wedge preferably coinciding with the longitudinal axis of the thread. If the at least one first wedge is moved, the shape and / or dimensions of the expansion element can thereby be changed, as explained above.

A connection between the first wedge and the threaded body can thus be a direct mechanical connection. However, it is also possible that the connection is an indirect connection, i.e. for example via a further part, the further part e.g. can be arranged between the at least one first wedge and the threaded body. Such a further part can, for example, be a separate thread, for example an internal thread, which is connected, in particular firmly connected, to the at least one first wedge. Such an internal thread can then, for example, have an operative connection with an external thread of the threaded body.

A movement of the at least one first wedge can also be guided through the thread of the threaded body, so that a rotation of the threaded body leads to a movement of the at least one first wedge, in particular linearly and along the threaded body, i.e. parallel to a longitudinal axis of the threaded body.

Alternatively or cumulatively, the expansion element can also be mechanically connected to the thread of the threaded body. The mechanical connection can take place, for example, via a transmission part which is in contact with the expansion element and can exert a force on it for displacement. The transmission part in turn can have a thread which engages with the thread of the threaded body. If the thread of the threaded body rotates, the transmission part moves along the thread of the threaded body, so that the expansion element is displaced. The expansion element can hereby be moved, for example, on the at least one first wedge along a contact surface in the transverse direction to the longitudinal axis of the thread, so that the shape and / or the dimensions of the expansion element are changed.

If, as already mentioned, the expansion element interacts with a thread of the threaded body, the expansion element can be changed in shape and / or dimension by rotating the thread, because the expansion element, in particular its center of gravity, moves relative to the at least one first wedge becomes.

The actuating element is used to apply a torque to the threaded body. It can be rigidly connected to the threaded body and designed to absorb a torque. The actuating element can in particular be rigidly connected to the threaded body and / or have a mechanical interface and / or be connected to a mechanical interface, the mechanical interface serving to exert a torque for the rotation of the threaded body on the latter. Such a mechanical interface can have, for example, an internal hexagonal profile and / or an external hexagonal profile in the form of a screw head. Any other types of screw head profiles are possible.

The support element serves in particular to provide a non-rotatable arrangement of a part interacting with the thread when the threaded body rotates, e.g. B. the at least one first wedge and / or the expansion element to enable. In other words, the support element can make it possible for the at least one first wedge and / or the expansion element not to rotate / rotate with it when the threaded body rotates. A torque that acts on the threaded body can therefore in particular be supported by the support element. The support element can in particular along the threaded body
or a portion thereof extend and / or receive and / or store the threaded body in its interior. The support element can in particular be rod-shaped and / or at least partially hollow. In particular, the support element can be tubular and the threaded body can be arranged at least partially in an inner volume of a tubular region of the support element.

The at least one first wedge can be mechanically connected or connectable to the support element, in particular firmly connected or connectable, for example by a force-fit connection, for example in the form of a press fit, in particular a press fit, and / or for example by a form-fitting connection, for example a spline connection and / or a tooth profile and / or a thread, for example a thread with a locking ring. The at least one first wedge is then neither linearly movable nor rotationally movable.

The at least one first wedge can also be designed as an integral part with the support element and / or there can be a material connection between the at least one first wedge and the support element. This cohesive connection can be made, for example, by soldering, welding or gluing. The at least one first wedge can also be firmly connected to the support element, for example, and can be connected to the expansion element by contact, in particular on a contact surface.

The at least one first wedge can alternatively be arranged movably along its longitudinal axis relative to the support element. For example, the at least one first wedge can interact in particular with a thread of the threaded body, so that the at least one first wedge is moved along a longitudinal direction of the thread when the thread of the threaded body is rotated and with the expansion element by contact, in particular for example at a contact surface. Here, the at least one first wedge can in particular be guided through the expansion element and / or through the support element in such a way that it does not follow a rotation of the thread of the threaded body. The at least one first wedge is then linearly movable, but not rotatable. If it were to be rotatable, it could not move along a longitudinal direction of the thread, but would rotate with the rotation of the thread.

The support element can furthermore have a gripping area and / or a sliding area and / or form a sliding and gripping area. In the gripping area, the support element can be held in place, for example, by an external gripping device and / or a holder, so that a counter-torque can be absorbed in this way, which acts on the support element when a torque acts on the threaded body.

In particular, a cover element can be slidably mounted on the sliding area, which cover element can, for example, be suitable for covering an open area of a tubular body, for example a pipe end, in order to close the interior of the tubular body, for example during a machining process. Such a machining process can be, for example, a coating process, with a coating being applied to the outside of the pipe body.

The proposed holding device for tubular bodies offers in particular the advantages that it is simple and easy to maintain, can be used easily, can be used flexibly for different types of tubular bodies, is variable and can be manufactured inexpensively. Pipe bodies can be held reliably. The operation of the holding device is easy. All parts can be made of heat-resistant materials, especially metal. In particular, the proposed holding device offers the advantage that, for example for a coating of a tubular body, the entire outer surface of the tubular body is exposed.

The proposed holding device for tubular bodies also offers the advantages that a tubular body can be held on the inner surface of the tubular body, in particular in an automated manner. In particular, the holding of the tubular body can be started and ended automatically. The holding force can also be adjusted.

The holding of the tubular body can also be made possible without damage, e.g. B. at a convenient location on the inner surface where there is no thread and / or any other part of the tubular body that could be damaged by holding. Such a miscellaneous part can be, for example, a shoulder, a notch and / or a seal. Depending on the type and nature of the tubular body, favorable locations for holding can be located at different positions on the inner surface, in particular at different depths within the tubular body.

In an advantageous embodiment, the holding device has a spring element which is designed to generate a force which counteracts the spreading of the spreading element.

Alternatively or cumulatively, the spring element can be configured such that it generates a force which, when the expansion element contracts, has a supporting effect or causes the contraction.

The spring element can in particular be an annular spring, in particular an annular worm spring made of metal, which is attached to the outside of the expansion element, for example, and runs around the expansion element. It can also be any other type of spring. As an alternative or in addition, it can be a tension spring, for example, which runs between at least two parts of the expansion element, for example through a cavity of the expansion element and is attached to at least two parts. The tension spring can in particular - like an annular spring - bring about a force on the at least two parts of the expansion element, which is radially inward, for example is directed in the direction of the longitudinal axis of the expansion element.

Alternatively or additionally, a spring element can run, for example, between at least part of the expansion element, for example an expansion part, and another part of the holding device, in particular the threaded body and / or the support element. A force in the direction of the threaded body and / or the support element can thus act on the at least one part of the expansion element. The spring element can be designed in such a way that this force only arises after a certain amount of expansion of the expansion element.

An annular spring can, for example, be arranged in at least one groove on an outside of the expansion element and / or, for example, be connected to parts of the expansion element on internal fastening devices, for example hooks. A tension spring can, in particular, be attached to internal fastening devices on parts of the expansion element.

The proposed embodiment makes it possible, in particular, that parts of the expansion element are held in their position and the process of releasing a tubular body is simplified. Heat resistance can be achieved, for example, in that the spring element is made of heat-resistant material, for example metal.

In an advantageous embodiment, during the relative movements of the at least one first wedge and at least part of the expansion element, the at least first wedge moves or slides along a contact surface of the expansion element oriented obliquely to the longitudinal axis of the expansion element and / or the expansion element along an oblique to the longitudinal axis of the first Wedge-oriented contact surface of the first wedge.

An inclined contact surface can in particular be arranged or formed on the at least one first wedge and / or on the expansion element. In particular, there can be two contact surfaces, one each on the at least one first wedge and one on the expansion element, which touch one another. These contact surfaces can be sliding surfaces. The contact surface of the first wedge can in particular be an outer surface of the first wedge. The contact surface of the expansion element can in particular be an inner surface of the expansion element, e.g. a surface comprising the previously explained cavity.

With the help of at least one such contact surface, in particular a movement of the at least one first wedge caused by interaction with the thread of the threaded body and running longitudinally along the thread can lead to an at least partial transverse movement of the expansion element which runs transversely to the thread, i.e. to expansion or contraction . Here, the at least one first wedge moves at least partially along the contact surface.

The contact surface can in particular be a ground surface that is at least partially straight and / or curved. It can also be, for example, a surface in or on a profile, for example a V-shaped profile, wherein the at least one first wedge has a V-shaped groove and the expansion element has a V-shaped projection, which in the V-shaped groove runs, or vice versa. As an alternative or in addition, other elements can be used for motion control. A lubricant can be used in particular on the contact surface.

The configuration is advantageous because it can in particular reduce the wear and tear of the at least one first wedge and the expansion element and can contribute to the stability of the holding device. Furthermore, a contact surface increases the possible force that can act on the interior of a tubular body for holding.

In an advantageous embodiment, the support element is designed as a hollow element.

The support element can be designed, for example, at least partially as a tube-like part and / or as a rod-shaped part that has a hole and / or a recess. In particular, the threaded body can run within the support element. At a first end of the support element, the actuating element can be arranged, which can be arranged in particular rotatable relative to the support element and can be connected fixedly or rigidly and detachably to the threaded body.

For example, the support element can have or form a contact or support surface for the actuating element at the first end. Since the actuating element has such a surface, the actuating element can be held by the support element, for example in the case of a vertical suspension of the holding device, in particular held in such a way that the actuation element and the support element are movable relative to one another, in particular are held rotatably. A vertical suspension of the holding device refers in particular to a suspension in which the threaded body and / or the support element is / are arranged in the direction along the earth's gravity field.

The threaded body can be mounted within the support element, for example in a sliding manner and / or by roller bearings. Alternatively, the threaded body can extend rotatably through the hollow element without being specially mounted. Thus, a diameter of a cavity of the support element and / or the recess can in particular be larger than a diameter of the threaded body, so that the threaded body can be rotated within the hole.

A support element designed as a hollow element offers the advantage that the threaded body is protected from external influences, for example dirt and / or temperature. Furthermore, a gripping area and / or a sliding area can easily be shaped or formed on a support element designed as a hollow element, in particular on an outer surface. If, for example, the support element is at least partially designed as a tubular part, the sliding area and / or the gripping area can be formed on the outside of the tubular part.

In an advantageous embodiment, the holding device has a second wedge, wherein the expansion element expands when there is a relative movement between the second wedge and the expansion element in a first direction and contracts or when a relative movement between the second wedge and the expansion element extends in a second direction a contraction is released.

The second wedge can be designed like the at least one first wedge with regard to its shape and / or its design. Therefore, reference is made to the relevant explanations. The first and the second wedge can be arranged such that the longitudinal axes of the at least one first and the second wedge run parallel or collinear. In particular, the threaded body and / or the support element can be arranged at least partially within the second wedge, as described for the at least one first wedge.

In particular, the second wedge can have a contact area and / or a contact surface and / or a thread, the second wedge in particular in mechanical connection with the threaded body, in particular with the thread of the threaded body, and / or with the expansion element and / or with the support element can stand.

The second wedge can be connected to the expansion element and / or to the threaded body and / or to the support element, as described with reference to the at least one first wedge. The second wedge can e.g. be guided through a thread of the threaded body as described with respect to the at least one first wedge.

As already described above with regard to the first wedge, the second wedge and the expansion element can also be arranged and / or designed in such a way that the second wedge and the expansion element contact, in particular touch, or can contact. The second wedge and the spreading element can also be arranged and / or designed such that the second wedge and the spreading element are mechanically connected or connectable. In this case, the spreading element is movably arranged in such a way that a relative movement of the spreading element to the second wedge is possible, as is described with reference to the at least one first wedge.

Alternatively or cumulatively, the second wedge can also be mechanically connected or connectable to the support element, in particular firmly connected or connectable, as described with reference to the at least one first wedge. In this case, in particular the at least one first wedge can interact with the thread of the threaded body in such a way that a rotation of the threaded body causes a movement of the at least one first wedge. Alternatively, the second wedge can interact with the thread of the threaded body in such a way that a rotation of the threaded body causes a movement of the second wedge. In particular, the at least one first wedge can then be firmly connected to the support element.

Alternatively, the at least one first wedge can interact with a further thread of the threaded body in such a way that a rotation of the threaded body causes different movements of the wedges. For example, the thread and the further thread can be designed as opposing threads, so that the at least one first wedge and the second wedge move towards or away from one another when the threaded body is rotated.

Both the at least one first wedge and the second wedge can be connected to the expansion element, for example via a respective contact area of the expansion element which, for example, is each used as a contact surface, e.g. can be designed as a contact surface inclined to the respective longitudinal axis.

The two wedges are preferably arranged on opposite end faces of the expansion element. In the case of a relative movement along the first direction, the first wedge can then move into a cavity of the expansion element on a first end face and the further wedge can move into a cavity of the expansion element on another Move in the end face of the expansion element, which is opposite the first end face. With a relative movement along the further direction, the first wedge can then move out of the cavity of the expansion element on the first end face and the further wedge can move out of the cavity of the expansion element on the further end face.

In the cases mentioned, a relative movement is possible between the at least one first wedge and the expansion element and between the second wedge and the expansion element. In particular, the expansion element can be expanded by a relative movement of the two wedges. As a result, the expansion element can press in particular against an inner wall of a tubular body, whereby the tubular body is held.

The embodiment described offers the advantage that a spreading force, which is converted into a holding force for the tubular body by the spreading element, can be increased by the second wedge. Furthermore, a relative movement of the expansion element with respect to the wedges can additionally be guided by the second wedge. If, for example, the at least one first wedge and the second wedge are designed symmetrically to one another with regard to the configuration of the contact surfaces, two contact surfaces of the expansion element, one of which is in contact with a contact surface of the first wedge and the other with a contact surface of the second wedge, can be similar forces act on the expansion element. For this purpose, the contact surfaces of the spreading element can in particular also be designed symmetrically with respect to one another, in particular in such a way that contact surfaces are designed at two longitudinal ends of the spreading element.

The spreading element can then be configured particularly long between these two contact surfaces of the spreading element, since forces act on the spreading element symmetrically at the two longitudinal ends via the contact surfaces. As a result, a possible contact area with an inner surface of a tubular body can in particular be particularly large.

The expansion element can also be designed, for example, in such a way that when the threaded body is rotated it can stretch or compress in the longitudinal direction to the thread and thereby touch the at least one first wedge and the second wedge, whereby a relative movement of the expansion element to the at least one first wedge and the second wedge is effected, in particular when the expansion element interacts with the thread of the threaded body.

In an advantageous embodiment, the at least one first wedge or the second wedge is firmly connected to the support element.

The respective other wedge can then in particular be arranged movably in such a way that a relative movement between the wedges is possible. The respective other wedge can in particular interact with the thread of the threaded body in such a way that a rotation of the threaded body causes this other wedge to move.

The proposed embodiment represents a particularly simple structural implementation of a design of the holding device which has at least one first wedge and at least one second wedge.

In an advantageous embodiment, the at least first wedge and the second wedge are arranged at opposite ends of the expansion element.

In particular, the expansion element can have contact areas at both ends, for example designed as contact surfaces, one of which is or can be contacted by the first wedge and the other by the second wedge. In particular, the expansion element can be movable to both wedges, in particular in a direction which is transverse to the longitudinal direction of the thread of the threaded body.

The proposed embodiment allows in particular that forces which act on the spreading element transversely to the longitudinal direction of the thread are exerted on the spreading element at the opposite ends of the latter. This advantageously enables the spreading element to be spread apart evenly over its entire length and to be pressed against the inner wall of a tubular body to be held, which enables a reliable holding.

In an advantageous embodiment, the support element has a sliding area on which a cover element is slidably mounted. The holding device can comprise the cover element.

The sliding area can in particular be designed as a surface, for example as a surface running around the support element. The surface can in particular be treated, for example ground, so that, for example, only slight unevenness occurs along at least one direction of the surface in which the cover element can slide. This makes it easier for the cover element to slide along the sliding area.

The sliding area can also be a gripping area. At the gripping area, for example, a machine, for example a robot, can hold and / or move the support element and thus the holding device and, if necessary, additionally a tubular body held by the holding device. The gripping area and thus the support element can also be secured against rotation, for example by such a machine, while a torque acts on the actuating element.

The cover element can in particular serve to cover an open area of a pipe body, for example a pipe end, as already mentioned. The cover element can in particular be designed in the form of a disk, for example in the shape of a hollow disk. The cover element can in particular be designed in such a way that it is exchangeable. A different cover element can thus be used for a different tubular body. For example, a cover element can correspond to a diameter of a tubular body such that the diameter of the cover element exceeds the diameter of the tubular body by only a few millimeters.

The sliding area can in particular have a certain extent, that is to say length, in the direction of the longitudinal axis of the support element. The cover element can be movably supported in the direction of the longitudinal axis of the support element on the support element, in particular on the sliding area. In this way, different insertion depths of the holding device, which may be necessary, for example, for different types of tubular bodies to be held, can be taken into account. In addition, the sliding area offers a simple way of constructing a connection with the cover element.

In an advantageous embodiment, the support element is firmly connected to a cover element.

The cover element can in particular be firmly connected to the support element in such a way that it can absorb a force, in particular a force which acts as a compressive force on the support element in the longitudinal direction of the support element or a tubular body to be held. Such a compressive force can arise, for example, at the beginning of a holding process, in which at the beginning of the holding process the tubular body to be held and the cover element are pressed against one another. Such a compressive force can alternatively or additionally also arise if spreading the spreading element also causes an expansion and / or a change in position of the spreading element in the longitudinal direction of the spreading element.

Such a compressive force can be desired in order to shield an interior of the tubular body particularly effectively from the outside, for example in the course of a coating process which is intended to affect a coating of the outer surfaces and not the inner surfaces of the raw body.

A fixed connection of the cover element to the support element can be achieved, for example, by a screw connection and / or a clamp connection. Such a connection can in particular be detachable so that a position of the cover element can be adjusted along the longitudinal axis of the support element. Alternatively, the cover element can be firmly and non-detachably connected to the support element, for example with the aid of a joining process and / or as an integral, common part.

A cover element that is firmly connected to the support element offers the particular advantage that a tubular body can be pressed against the cover element with a compressive force, in particular in order to shield an interior of the tubular body particularly effectively from the outside.

In an advantageous embodiment, the actuating element and / or the support element has / have a holding means for holding it on an external support structure, in particular a suspension. In particular, this can be a support surface. in particular, holding on the external support structure can be made possible by the holding means.

By means of the support surface, the holding device and thus possibly a held tubular body can in particular be hung on the external support structure.

Such an external support structure can, for example, have a slotted partial area. At the slotted partial area, the external support structure can have a support area on the holder side or a support surface on the holder side. In particular, the holding means of the actuating element and / or of the support element can be brought into contact with such a support area on the holder side for holding purposes. In this way, the actuating element and / or the support element can be held.

The contact surface of the actuating element and / or the support element can in particular be aligned and / or curved transversely and / or obliquely to the longitudinal axis of the actuating element and / or to the longitudinal axis of the threaded body. In particular, the support surface can be designed in such a way that it is in contact with the supporting structure side Support surface forms a self-positioning and / or a self-centering effect.

E.g. the supporting surface on the supporting structure side can be arched or curved, in particular such that a holding device arranged on the external supporting structure cannot slip out of the supporting structure.

For example, the contact surface of the actuating element and / or the support element can also be arched or curved, in particular such that the contact surfaces can be connected in a form-fitting manner.

Alternatively or additionally, for example, the slot of the external support structure can be inclined so that the holding device can slide into the slot due to the force of gravity.

As an alternative or in addition to a support surface, the holding means can also be configured differently. It can be, for example, a hook and / or a clip that is / are formed, for example, on the support element and / or on the actuating element or connected to it.

A holding means which has the actuating element and / or the support element is a simple possibility of attaching, in particular suspending, the holding device and, if appropriate, a tubular body held by it to an external support structure.

The external support structure can form a system with the holding device, which can hold a pipe. In particular, the external support structure can be designed in such a way that a machine, for example a robot, can grasp the holding device that is held on the external support structure, for example by means of a programmed movement sequence.

The external support structure can also be designed and arranged in such a way, for example on a wall or a conveyor, that it can hold the holding device in the earth's gravity field in such a way that the holding device is oriented in the direction of the earth's gravity field and, in particular, can hang on the external support structure. The external support structure and / or the holding device can in particular be connected to one another by a force fit and / or form fit such that the holding device cannot detach itself from the external support structure, for example by a slight lateral force or a shock.

In particular, the external support structure and the holding device can be designed in such a way that detaching the holding device from the external support structure can require a movement of the holding device against the earth's gravity, that is to say lifting it.

The external support structure can be designed so that it can secure the support element against rotation about its longitudinal axis, for example by non-positive or positive contact with the external support structure, for example on a gripping area of the holding device, which can be present on the support element. For example, a torque can act on the threaded body, for example introduced into the actuating element, without the support element being rotated at the same time. This can cause the spreading element to spread open or the holding element to contract, as a result of which a tubular body can in particular be held and / or released.

• - Einbringen der Haltevorrichtung oder eines Teils davon in den Rohrkörper und
• - Aufbringen eines Drehmoments auf das Betätigungselement.

A method for holding a tubular body or a method for producing a held state of the tubular body with the aid of a holding device for tubular bodies according to one of the embodiments described in this disclosure is also proposed, comprising the following steps:

• - Introducing the holding device or a part thereof into the tubular body and
• - Applying a torque to the actuating element.

When the holding device is introduced into the tubular body, in particular the expansion element of the holding device can be arranged, in particular completely, in an inner volume of the tubular body. It is also possible for the at least first wedge to be arranged in the interior volume. It is also possible that the actuating element 4th is arranged outside the interior volume. Part of the threaded body can also be arranged in the inner volume and a further part of the threaded body outside the inner volume. In particular, the holding device can be introduced into the tubular body in such a way that the expansion element is arranged at a desired insertion depth along the tubular body axis. This can in particular be selected in such a way that no compressive force is exerted on an (inner) threaded section of the tubular body by the expansion element.

The application of the torque can take place in such a way that the expansion element expands and exerts a compressive force against an inner wall of the tubular body. This allows the tubular body to be held.

It is then further possible to apply a torque to the actuating element in such a way that the expansion element contracts or a contraction is released. Then no compressive force is exerted against an inner wall of the tubular body. As a result, the tubular body can be switched from the held state to an unhipped state.

• 1a: eine schematische Ansicht einer erfindungsgemäßen Haltevorrichtung in einem Längsschnitt, wobei bei der Haltevorrichtung in einem ersten Zustand gezeigt ist;
• 1b: eine schematische Ansicht einer erfindungsgemäßen Haltevorrichtung in einem Längsschnitt, wobei bei der Haltevorrichtung zum Teil und in einem zweiten Zustand gezeigt ist;
• 2: eine weitere schematische Ansicht der erfindungsgemäßen Haltevorrichtung in einem Längsschnitt, wobei sich die Haltevorrichtung in einem Halter befindet;
• 3: eine schematische Ansicht einer weiteren erfindungsgemäßen Haltevorrichtung in einem Längsschnitt;
• 4: eine schematische Ansicht eines beschriebenen Verfahrens.

Embodiments of the invention will now be described with reference to the accompanying drawings. The individual figures in the drawing show:

• 1a : a schematic view of a holding device according to the invention in a longitudinal section, the holding device being shown in a first state;
• 1b : a schematic view of a holding device according to the invention in a longitudinal section, wherein the holding device is shown in part and in a second state;
• 2 : Another schematic view of the holding device according to the invention in a longitudinal section, wherein the holding device is located in a holder;
• 3 : a schematic view of a further holding device according to the invention in a longitudinal section;
• 4th : a schematic view of a described method.

In various exemplary embodiments, the same reference symbols are used for devices, parts and elements with the same features or functions.

1a shows a schematic view of a holding device according to the invention 1 in a longitudinal section, the holding device 1 is shown in a first state. In 1b is the holding device 1 shown in part and in a second state.

The holding device 1 has an actuating element 4th on, which has an external hexagon profile. This actuator 4th can at a first end of the holding device 1 be arranged as in 1a shown. The external hexagon profile is indicated by broken lines. Alternatively or additionally, the actuating element 4th have another mechanical interface, for example a hexagon socket profile, a cross or a slot profile or a Torx profile. The actuator 4th is as an integral part with a threaded body 5 educated. The actuator 4th has a support surface 4a on the underside of the actuating element 4th on. The threaded body 5 is designed like a rod, alternatively it can also be designed differently. For example, it can have a non-round profile in cross section. The threaded body continues 5 a thread 6th on. Alternatively, the threaded body 5 for example have two threads, in particular two threads running in opposite directions. The actuator 4th can, as in 1a is shown, in particular at a first end of the threaded body 5 be arranged, the thread 6th can in particular at a further end of the threaded body 5 be arranged.

The threaded body 5 is about a longitudinal axis L. that is the longitudinal axis of the thread 6th corresponds, rotatably arranged.

The support element 3 has a gripping area 10 on. The gripping area 10 is located between the support surface 4a and a first wedge 2a outside of the support element. The support element 3 can alternatively or additionally have a further support surface.

The support element 3 can in particular be designed as a tubular hollow body as in 1a is shown. It can alternatively or additionally be designed differently, for example as a rod that is laterally next to the threaded body 5 runs and the threaded body 5 not or only partially encloses. The threaded body 5 is partly within the hollow support element 3 arranged. A first end of the support element is, as in FIG 1a can be seen on the actuating element 4th arranged.

The first wedge 2a has a longitudinal section in the lower area around the longitudinal axis L. circumferential profile, the first wedge 2a is designed as a circumferential, hollow part. He has several in relation to the longitudinal axis L. inclined contact surfaces 13a each with a spreading element 8th contact, which consists of several spreading parts. The expansion parts are circumferential around the longitudinal axis L. arranged. The long axis of the first wedge 2a and the longitudinal axis of the expansion element 8th are collinear with the longitudinal axis L. .

The contact areas 13a are straight or not curved, but alternatively they can also be curved. Alternatively or additionally, they can have a self-centering profile, for example, along which the expansion parts of the expansion element 8th can move.

The spreading element 8th , in particular the expansion parts also have contact surfaces that are on the contact surfaces 13a can slide. These contact areas can, for example, match the contact areas 13a , also be designed differently, for example be arched and / or have a self-centering profile, for example, with a self-centering profile of the contact surfaces 13a can work together.

The expansion element can in particular, as in 1a is shown, be designed in such a way that opening areas for the first wedge at both ends 2a and a second wedge 2 B available. These openings can, as in 1a is also shown, have surfaces that can be designed as contact surfaces of the expansion element. You can, as in 1a is shown with the contact surfaces 13a and contact surfaces 13b of the second wedge 2 B are in contact so that they can slide with the contact surfaces of the expansion element.

Alternatively, the expansion element 8th , in particular the expansion parts, also only have contact areas that are on the contact surfaces 13a the first wedge can slide, but not planar, but z. B. are formed point-like or line-like and / or have only small area-like areas. Alternatively, the first wedge 2a have such contact areas and the expansion parts have contact surfaces.

The expansion parts of the expansion element 8th are by spring elements 7th , which are designed as revolving worm feathers, held together. So they are additionally in the direction of the longitudinal axis L. held.

The first wedge 2a is fixed, for example by means of an interference fit, with the support element 3 connected at its further end and extends in a section along the support element 3 . Alternatively, the first wedge 2a also in a different way with the support element 3 be connected, for example, it can be threaded onto the support element 3 be screwed and / or using, for example, a locking ring on the support element 3 be held.

The spreading element 8th is still in contact with the second wedge 2 B , which also has contact surfaces 13b having. The contact areas 13b are oblique to the longitudinal axis L. arranged and are mirror-symmetrical to the contact surfaces 13a of the first wedge 2a arranged. The plane of symmetry sits centrally between the first wedge 2a and the second wedge 2 B and is transverse to the longitudinal axis L. arranged. The second wedge 2 B is with the thread 6th of the threaded body 5 in interaction. The second wedge 2 B has an internal thread for this purpose, which connects to the thread 6th interacts.

The spreading element 8th sits along its long axis, which is collinear with the long axis L. is, between the first wedge 2a and the second wedge 2 B .

Is via the actuator 4th a torque on the threaded body 5 exercised, this rotates. Here, the support element 3 be held, in particular by a machine and / or a robot, so that the threaded body 5 relative to the support element 3 turns. The thread 6th then also rotates and causes the second wedge to move 2 B along the longitudinal axis L. . The second wedge moves 2 B , starting from the first state in 1a is shown, due to a corresponding rotation of the thread 6th along the longitudinal axis L. at the first wedge 2a to, the second state that is in 1b is shown achieved.

Due to the movement of the second wedge 2 B is the distance between the first wedge 2a and the second wedge 2 B in 1b smaller than in the in 1a State shown, the expansion parts of the expansion element 8th are along the contact surfaces 13a and 13b shifted radially outwards and axially towards the first wedge 2a down. It is a movement of the expansion parts, which has a component that is transverse to the longitudinal axis L. shows. The expansion parts could now have a tubular body 11 (please refer 3 ) by exerting a compressive force on its inner wall. The expansion parts advantageously have the tubular body 11 shaped outer surfaces, in particular curved surfaces. You can also, for example, an anti-slip coating or a surface that prevents the pipe body from slipping 11 difficult to exhibit.

Should the pipe body 11 are released from the holding device, a torque is applied to the threaded body 5 exerted, which points in the other direction of rotation than the torque that led to the transition from the first to the second state. The expansion parts of the expansion element 8th then detach from the pipe body 11 and release it again by moving inwards towards the longitudinal axis L. , move. While the expansion parts move inwards, the spring elements act 7th at least supportive. In particular, the expansion parts can by the spring elements 7th be moved inward alone. The spring elements 7th also prevent the expansion parts 8th from the holding device 1 falling off.

In 2 is a further schematic view of the holding device according to the invention 1 shown in a longitudinal section, wherein the holding device 1 in a holder 9 is located. The holding device 1 is located in the in 1a shown first state. The holder 9 is designed as a hook with a slot S. The holder 9 has a support surface on the holder side 9a on. The support surface lies on it 4a of the actuating element 4th on.

The slot S is at the beginning of the slot S on the holder 9 down, executed so that the holding device 1 can slide into the slot due to gravity.

In 3 is a further schematic view of a holding device according to the invention 1 shown in a longitudinal section, wherein the holding device 1 in a holder 9 located and the pipe body 11 , which is designed as a tube, holds. The holding device 1 is essentially like the one in 1a shown holding device shown and is in the second state, wherein the holding device 1 in 3 in contrast to the in 1a and 1b embodiment shown additionally a cover 12 has that at the gripping area 10 , which is designed as a sliding area, is slidably mounted. Alternatively, the cover 12 also firmly with the support element 3 be connected, for example screwed, pressed, connected with a joining process and / or as an integral part.

The expansion parts of the expansion element 8th grab the pipe body 11 below a pipe thread 14th so that the pipe thread 14th is not damaged by the expansion elements. The cover 12 is due to gravity on an opening in the pipe body, which is in 3 located directly under it. For example, if the pipe thread 14th a larger vertical section of the tubular body 11 would take, the holding device could 1 deeper into the pipe body 14th to keep penetrating, especially as the cover 12 is slidingly mounted.

4th shows a schematic view of a described method. In a first step S1 becomes a tubular body ( 11 , please refer 3 ) on the holding device 1 (please refer 1a-3 ) brought in. That means in particular that a cavity of the tubular body 11 such about the holding device 1 is performed that the expansion element 8th (please refer 1a-3 ) within the cavity of the tubular body 11 is located. The tubular body 11 can in particular in this way on the holding device 1 be introduced so that one end is in contact with the cover 12 (please refer 3 ) stands.

In a second step S2 is now a first torque, for example with the help of a motor, on the actuating element 4th (please refer 1a-3 ) applied. This first torque is applied to the threaded body 5 (please refer 1a-3 ) and to the thread 6th (please refer 1a-3 ) transfer. The first torque causes a first rotation of the thread 6th in a first direction of rotation. The second wedge 2 B (please refer 1a-3 ) interacts with the thread 6th . Due to the first turn of the thread 6th the second wedge moves 2 B along the threaded body towards the first wedge 2a (please refer 1a-3 ). As a result, the expansion element expands 8th (please refer 1a-3 ) on. The expansion parts of the expansion element 8th move away from the longitudinal axis L. (please refer 1 a-3 ). This is in 4th shown in the second step S2 by two arrows moving away from each other. The expansion parts press against the pipe body from the inside 11 . At a desired pressing force, the first turn of the thread 6th can be terminated, for example, by the motor being a torque-controlled motor that stops operating when a certain torque is reached. The tubular body 11 is now through the holding device 1 held. The tubular body 11 can for example be transported and / or moved and / or stored. For example, it can be stored while a coating process B is in progress.

In a third step S3 For example, when the coating process B is finished, a second torque, which is opposite to the first torque, is now applied by the motor.

This second torque is applied to the threaded body 5 and to the thread 6th transfer. The second torque causes a second turn of the thread 6th in a second direction of rotation which is opposite to the first direction of rotation. The second wedge 2 B interacts with the thread 6th . Due to the second turn of the thread 6th the second wedge moves 2 B along the thread 6th away from the first wedge 2a . This allows the expansion element 8th pull together. The expansion parts of the expansion element 8th move towards the longitudinal axis L. caused by the spring elements 7th (please refer 1a-3 ). This is in 4th shown in the third step S3 by two arrows moving towards each other. Pressing the expansion parts against the pipe body from the inside 11 can thereby be reduced or terminated in the pressing force.

With a desired movement of the expansion parts towards the longitudinal axis L. can turn the thread 6th can be ended, for example, in that the motor is a motor controlled on the basis of the number of revolutions, which stops operation when it reaches a certain number of revolutions.

Alternatively or additionally, the thread 6th at its two longitudinal ends (or alternatively at one of its longitudinal ends), for example (each) have a stop which is designed to move the second wedge 2 B to block. Such a stop can in particular serve to prevent the wedge 2 B during the third step S3 loosens from the thread. For this purpose, such a stop can in particular be arranged such that the second wedge 2 B reaches him when he is through the second turn of the thread 6th is moved in such a way that the expansion element 8th contracts.

In a fourth step S4 the tubular body is removed from the holding device, for example automatically or manually.

List of reference symbols

1

Holding device

2a

first wedge

2 B

second wedge

3

Support element

4th

Actuator

4a

Support surface

5

Threaded body

6

thread

7th

Spring element

8th

Expansion element

9

holder

9a

Support surface

10

Gripping area

11

Tubular body

12

cover

13a

Contact area

13b

Contact area

L.

Longitudinal axis

14th

thread

Claims (11)

Holding device (1) for tubular body (11), comprising: - at least one first wedge (2a), - an expansion element (8), - a threaded body (5), - a support element (3), - An actuating element (4), the expansion element (8) or the at least one first wedge (2a) interacting with a thread (6) of the threaded body (5) in such a way that a rotation of the threaded body (5) causes a relative movement between the causes at least one first wedge (2a) and the expansion element (8), the expansion element (8) expanding in a relative movement between the at least one first wedge (2a) and the expansion element (8) in a first direction and expanding in an a second direction relative movement between the at least one first wedge (2a) and the expansion element (8) contracts or a contraction of the expansion element (8) is released. Holding device (1) Claim 1 , characterized in that the holding device (1) has a spring element (7) which is designed to generate a force which counteracts the spreading of the spreading element (8) and / or causes or supports the contraction of the spreading element (8). Holding device (1) according to one of the Claims 1 - 2 , characterized in that during the relative movements between the at least one first wedge (2a) and at least part of the expansion element (8), the at least one first wedge (2a) extends along a contact surface oriented obliquely to the longitudinal axis (L) of the expansion element (8) (13a) of the expansion element (8) moves or slides and / or the expansion element (8) moves or slides along a contact surface (13a) of the first wedge (2a) oriented obliquely to the longitudinal axis (L) of the first wedge (2a). Holding device (1) according to one of the Claims 1 - 3 , characterized in that the support element (3) is designed as a hollow element. Holding device (1) according to one of the Claims 1 - 4th , characterized in that the holding device (1) has a second wedge (2b), wherein the expansion element (8) expands in a first direction relative movement between the second wedge (2b) and the expansion element (8) and expands in a Relative movement extending in a second direction between the second wedge (2b) and the expansion element (8) contracts or a contraction of the expansion element (8) is released. Holding device (1) Claim 5 , characterized in that the at least one first wedge (2a) or the second wedge (2b) is firmly connected to the support element (3). Holding device (1) according to one of the Claims 5 - 6th , characterized in that the at least one first wedge (2a) and the second wedge (2b) are arranged at opposite ends of the expansion element (8). Holding device (1) according to one of the Claims 1 - 7th , characterized in that the support element (3) has a sliding area on which a cover element (12) is slidably mounted. Holding device (1) according to one of the Claims 1 - 7th , characterized in that the support element (3) is firmly connected to a cover element (12). Holding device (1) according to one of the Claims 1 - 9 , characterized in that the actuating element (4) and / or the support element (3) has / have a holding means (4a) for holding, in particular suspension. Method for holding a tubular body (11) by means of a holding device (1) for tubular bodies (11) according to one of the Claims 1 to 10 , comprising the following steps: introducing the holding device (1) into the tubular body (11), applying a torque to the actuating element (4).

Images