EP3846971A1

EP3846971A1 - Swivel joint for a wooden work buck

Info

Publication number: EP3846971A1
Application number: EP19759493.0A
Authority: EP
Inventors: Jerome ORTNER
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-03
Filing date: 2019-08-22
Publication date: 2021-07-14
Anticipated expiration: 2039-08-22
Also published as: EP3846971B1; EP3846971C0; WO2020047567A1; AT521663A1

Abstract

The invention relates to a swivel joint (1) for movably connecting two beams of a work buck (14), wherein the swivel joint (1) has a first element (2) that is connectable to one of the beams (4), and a second element (3) that is connectable to the other beam (4), wherein the two elements (2, 3) are connected to at least one bolt (5) such that the two elements can rotate about an axis of rotation of the bolt (5) relative to one another. The aim of the invention is to increase robustness and to simplify operability. This aim is achieved, according to the invention, in that the two elements (2, 3) are connected to one another in a frictionally locking manner by means of an elastic deformation of at least one spring component such that a rotating of the first element (2) relative to the second element (3) requires a predetermined torque.

Description

Swivel joint for a wooden trestle

The invention relates to a swivel joint for movably connecting two beams of a wooden trestle, the swivel joint having a first element which can be connected to one of the beams and a second element which can be connected to the other beam, the two elements having at least one Bolt by one

Rotation axis of the bolt are rotatably connected to each other.

Work trestles, also called trestles, especially made of wood

Usually used on construction sites and serve as a base for supporting workpieces to be machined. Work trestles of this type usually have a work support supported by a plurality of feet, in order to place a workpiece stably on the work support of a work trestle or the work supports of several

To ensure work trestles. Such use on a construction site generally places high demands on the robustness and resilience of a work trestle, since, depending on the specific application, this trestle can be exposed to changing forces of different intensities and a considerable degree of contamination.

It has proven useful to design work trestles in such a way that they can be transported and / or stored with little effort, in order, for example, to be able to carry out work trestles to a construction site as simply and inexpensively as possible. For this purpose, it has proven to be expedient for the feet to be connected to the work surface in such a way that the feet move from one working position to another

The longitudinal extension of the feet is usually oriented perpendicular to the longitudinal extension of the work rest, in a transport position in which the longitudinal extension of the stand is usually parallel to the longitudinal extension of the work rest

is aligned, can be brought. In this way, a work trestle can be converted from a stable work shape into a space-saving transport shape. For example, document DE 20 2005 012 240 U1 discloses a work trestle whose feet are each rotatably connected to the work support by a screw relative to a work support. In a working position, a stand is positively gripped by a height-adjustable clamp, so that the stand rotates is prevented. By lifting the clamp, the base is released for rotation so that it can be rotated 90 ° into a transport position.

The aforementioned requirements for robustness and resilience relate in particular to swivel joints which enable a base to be rotated relative to a work support of a work trestle.

When using a swivel joint in auxiliary devices, such as a work trestle, which are subject to high cost pressure as wear devices, simple manufacture of the swivel joint with little effort is a particularly noted factor, which is reflected in corresponding requirements, such as an efficient and robust construction of the swivel reflects.

This is where the invention comes in. The object of the invention is to provide a rotary joint of the type mentioned, which has a high level of robustness and resilience, in particular with regard to changing acting forces, the

Swivel joint is suitable for movably connecting two beams of a work trestle, and which enables simple and flexible handling by a user. The object is achieved according to the invention in that, in the case of a swivel joint of the type mentioned at the outset, the two elements are connected to one another in a frictional manner by means of an elastic deformation of at least one spring component, so that rotation of the first element relative to the second element is a predetermined one

Torque required.

An advantage achieved with the invention is that a frictional

Connecting the two elements by means of an elastic deformation of at least one spring component enables a necessary torque in order to bring about a rotation of the first element relative to the second element to be selectively adjustable. In particular, this prevents an undesired rotation of the first element relative to the second element from occurring under loads acting on the swivel joint below the set torque. The torque required for turning can be matched to a particular application, for example

for example, an elastic degree of deformation of the spring component is changed. On In this way, for example, the first element can be rotated relative to the second element by a user into a desired rotational position, it being ensured that the rotational position is maintained even when external loads of low intensity are applied, for example when a device, such as a work trestle, is carried around.

A fundamental advantage of a frictional connection of the two elements is the high robustness achieved as a result, since forces are transmitted from one element to the other element without play. Because the frictional connection takes place by means of an elastic deformation of a spring component, in particular a robustness with respect to changing forces acting on an element is further increased. The

Spring component acts as a damping element due to its elastic behavior. In this way, for example, force peaks acting on the damping element can be reduced.

The first element and the second element can be connected directly or indirectly by friction in order to implement a frictional connection between the first element and the second element. For example, it can be provided that a further component is connected to one of the elements and that component is frictionally connected to the other element. In particular, the spring component, for example, which effects the frictional connection between the two elements, can be arranged between the first element and the second element.

An axis of rotation about which the first element can be rotated relative to the second element is defined by a bolt to which the two elements are connected. This can be implemented in a simple manner, for example, in that the first element and the second element each have a bore through which the bolt is passed and movably connects the two elements. The two elements can expediently be positively connected by the bolt, as a result of which the two elements can be rotated relative to one another in a robust manner. This can be achieved, for example, in that the bolt has one or more varying outer diameters in order to positively connect the two elements, in particular in a direction of the axis of rotation or longitudinal axis of the bolt. The bolt can be used, for example, as a collar bolt, Screw, threaded rod or pin. An outer diameter of the bolt can be varied, for example, by the bolt having at least one thread onto which at least one nut is screwed. A widening of the outer diameter can also be implemented in that the bolt has a transverse bore, transverse or angled to its longitudinal axis, through which a pin is inserted and, in particular, is connected to the bolt in a form-fitting, force-fitting or material-locking manner, the pin being one or both sides Exceeds the outer surface of the bolt. It is advantageous if the two elements are connected in such a way that rotating the first element relative to the second element requires a substantially constant predetermined torque. It is thereby achieved that a torque to be used in order to rotate the first element relative to the second element is independent of an angle of rotation between the two elements, as a result of which the swivel joint can be operated particularly easily and in particular safely by a user.

It is advantageously provided that the spring component is elastically deformed between the first element and the second element by a force acting approximately in the direction of the axis of rotation of the bolt. As a result, a frictional engagement caused by the elastic deformation of the spring component can be set in a simple manner by means of a force which acts or can be applied between the first element and the second element, for example a pressing force between the two elements. Furthermore, a simple constructive and robust construction of the swivel joint can thereby also be achieved, since a force can be applied between the two elements by the same components which stabilize an axis of rotation of the swivel joint. Thus, the force between the two elements can be implemented in a simple manner in that the bolt opposes the two elements due to the elastic deformation of the

The spring component causes the restoring force. For this purpose, the spring component can expediently be arranged, for example, between the two elements. However, it has proven useful that the spring element is arranged on a side of an element facing away from the other element. As a result, the spring element is better protected against loads. For example, the spring element can be arranged between an element and a region of the bolt with a widened outside diameter, for example a nut screwed onto the bolt. It It goes without saying that the aforementioned arrangement options of a spring element also include an arrangement of a plurality of spring elements, in particular according to the aforementioned arrangement options. For example, it can be advantageous to arrange several spring elements in series or parallel to one another and / or several

Arrange spring elements at different positions of the swivel joint in order to bring about a force or a frictional connection between the elements or to adjust the torque in order to rotate the first element relative to the second element.

For a robust and practical structure, it is expedient if the spring component is elastically deformed in the direction of an axis of rotation of the bolt. In particular, elastic restoring forces of the spring component, which deviate from a direction of the axis of rotation of the bolt or an axis of rotation of the swivel joint, are avoided, so that a high stability of the axis of rotation of the swivel joint can be achieved. A structure with high robustness that can be produced with little effort is achieved in particular if the spring component is elastically deformed by a force acting in the direction of the axis of rotation of the bolt between the first element and the second element and a frictional connection between the two elements is achieved by a frictional connection between two essentially perpendicularly surfaces aligned to the axis of rotation is produced. In particular, forces are efficiently transmitted between the elements and a high degree of rotation stability is implemented in a simple manner.

It is expedient if the spring component is arranged in a form-fitting manner around a section of the bolt such that movement of the spring component in a direction transverse to a longitudinal axis of the bolt is only possible to a limited extent. This avoids possible undesirable displacements or slipping of the spring component even with larger loads and vibrations of the swivel joint. For this purpose, the spring component can expediently have, for example, a through opening or a borehole through which the bolt is guided in order to arrange the spring component in a form-fitting manner around the bolt.

It is advantageously provided that the spring component is formed with a plate which is curved in such a way that the plate has an elastic spring behavior. As a result, the spring component is particularly robust and resistant. Even if basically that Spring component can alternatively be formed with coil springs in order to achieve an effect according to the invention, spring components formed with a curved plate have proven to be particularly robust and resilient, particularly in the case of frequently changing loads.

Resilient elastic behavior can be achieved if the curved plate has at least sections of two non-parallel legs in a cross section, which are connected, in particular at essentially the same angles, to a plate section connecting the two legs. Such a shape is particularly easy to produce and shows a high level of robustness against frequently changing loads. Particularly if it is provided that the plate section connecting the two legs is at least partially formed as a flat contact surface, a particularly high level of robustness is achieved since forces can be absorbed and transmitted over a larger area. Is preferred

provided that the curved plate on two opposite sides of the

Spring component at least in some areas as a plane, in particular in

Support surface aligned essentially parallel to one another

Absorb deformation forces. As a result, the spring component or the curved plate is at least two on opposite sides of the spring component

regionally flat sections, so that applied forces, which bring about or should cause an elastic deformation of the spring component, can be efficiently absorbed and converted into an elastic deformation. The

As a result, the spring component has high wear resistance and resilience. It has proven to be advantageous if the curved plate at least

sectionally has a shape of a truncated cone. Such shaped panels have a high resistance to changing loads from different directions, but are associated with a higher manufacturing effort. The spring component can also be designed as a plate spring in order to achieve a predefined frictional force in a simple manner.

In order to ensure stable and resilient rotation of the elements, it is advantageous if the first element is rotated relative to the second element with a guide. In particular, leadership increases resilience to that Bending forces acting on the hinge. This is achieved in a simple manner with little effort if one element has a guide recess, for example a groove, an incision or a slot, into which a guide pin corresponding to the guide recess is inserted in a form-fitting manner on the other element. It is expedient if two or more guide recesses are provided, in which a plurality of guide pins engage, in order to make a guide particularly robust. Particularly precise guidance is achieved if each of the elements has one or more

Has guide recesses, in which to the guide recesses

engage the corresponding guide pins on the other element in a form-fitting manner.

It is advantageous if a maximum and / or minimum angle of rotation between the first element and the second element is clearly defined. This facilitates operation by a user and enables the two elements to be quickly rotated into a rotational position of a minimum or maximum rotational angle. This can be implemented in a simple manner in that a guide recess clearly defines a maximum and / or minimum angle of rotation between the two elements. For this purpose, the guide cutout can be expedient, for example

circular arc, in particular as a circular incision or as

circular arc-shaped groove around an axis of rotation of the swivel or the bolt, whereby a maximum or minimum angle of rotation are defined by a beginning or an end of the guide recess. A one defined by the maximum angle of rotation and the minimum angle of rotation has proven particularly practical

Angle of rotation range of approximately 180 °, frequently also proven to be 90 ° as an alternative. This can be implemented in a simple manner in that at least one guide recess is designed as a semicircular or quarter-circular incision. For robust guidance with a maximum or minimum angle of rotation, it has proven useful if at least two arcuate guide recesses, in particular opposite one another, are arranged around the axis of rotation of the swivel joint or the axis of rotation of the bolt.

It is preferably provided that the first element can be locked relative to the second element at defined angles of rotation, in particular a maximum and / or a minimum angle of rotation. This enables a rotational position between the elements to fix it sustainably and securely to avoid undesired twisting, especially with large loads.

It is expedient if the first element can be locked relative to the second element by a form fit. This prevents the first element from rotating relative to the second element due to spatial confinement or spatial limitation. Such a lock is very robust and less prone to errors. This can be implemented in a simple manner in that the positive connection can be produced or released again by one or more movable locking elements.

For example, it can be locked by a displacement element which prevents the first element from rotating relative to the second element by being positively connected to both the first and the second element. For a robust and resistant locking, it has proven useful if a displacement element is movably connected to an element in such a way that this element corresponds to at least one corresponding to the displacement element

Sliding element receptacle on the other element is insertable to lock the first element relative to the second element. In particular, it is advantageous if a plurality of displacement element receptacles are arranged on the other element in such a way that the two elements can be locked at different angles of rotation. It is expedient if a snap mechanism is provided in order to produce a lock. It is usually provided that the first element can be locked relative to the second element in that an elastically deformable or spring-loaded snap element brings about a form fit. The positive connection can then be released again by elastic deformation or application of force against a spring force with which the snap element is loaded.

A resilient locking is implemented when the first element can be locked relative to the second element by a force fit. This can be done for example by a clamping device which fixes the first element relative to the second element.

It is expediently provided that the first element and / or the second element can be connected to the bar in a form-fitting, force-fitting or material-fitting manner. A force-fit connection by screwing has proven to be particularly practical and resistant. A robust connection of the first element and / or second element with a beam can be implemented with screws, bolt pins, claws, glue, anchor bolts and similarly suitable connection variants.

A connection of the first element and / or the second element to the beam has proven to be very resistant if a connecting bolt is guided through the beam transversely or at an angle to a longitudinal axis of the beam and is connected to the element on both sides of the beam. The element and the connecting bolt can in particular be connected positively or non-positively. It has proven to be practical here if the connecting bolt is carried out on both sides of the beam through a hole in the element and through a

Widening of an outer diameter of the connecting bolt, for example with a nut, in particular a cap nut or a shaft lock, such as a shaft ring, is connected to the element.

It is advantageously provided that the first element and / or second element is designed so that it can be connected to a bar in such a way that the first element and / or second

Element encloses the bar at least partially in a form-fitting manner. A form-fitting connection between an element and the bar allows a particularly strong connection to be established by an element. In particular, this is a pronounced one

Resilience to forces acting transversely to a connection direction between the element and the beam can be achieved. For a robust connection, it has proven useful for the first element and / or second element to at least partially form-fit around the respective beam, at least on two opposite sides of the beam. It goes without saying that it is usually provided that the first element and / or second element can be connected to a bar in a form-fitting, force-fitting or material-locking manner, and that a form-fitting grasping or embracing of the bar further strengthens this connection or its resilience.

It has proven useful for the first element and / or second element to have one or more plate-shaped wings, the wings being shaped, in particular curved, in accordance with a shape of an outer surface of the bar, in order to at least partially engage around a bar in a form-fitting manner. This enables a constant

Connect an element to a beam and efficiently transfer forces between the beam and the element. A connection is particularly robust if the first element and / or second element is designed so that it can be connected to a beam in such a way that the first element and / or the second element positively engages around a section of the respective beam along a circumference of the beam. For this purpose, the first element and / or second element can, for example, be cup-shaped, in particular with a bar section or

Beam cross-section corresponding shape or cross-sectional shape.

It is favorable if it is provided that the first element and / or the second element is designed so that it can be connected to a bar in such a way that the bar of

Components of the swivel joint, which are movable relative to the respective first element and / or second element connected to the beam, are spaced apart. As a result, the intended use of movable components of the swivel joint is not limited to one

Connection of the first element and / or second element with a bar hindered. This applies in particular to the bolt or a component rigidly connected to the bolt, such as a nut or a pin. For this purpose, it may be expedient for the first element and / or second element to have at least one spacing shoulder, which spaces a bar connected to the respective element from movable components of the swivel joint connected to the element relative to the element. Such movable components can be, for example, the bolt or a nut connected to the bolt.

Depending on the intended use, the swivel joint or its individual components can be formed, for example, with iron, steel, in particular stainless steel, brass, aluminum, plastic, composite materials or another suitable material. The spring element is preferably formed with spring steel, as a result of which a rotary functionality of the rotary joint is particularly robust against high-intensity forces.

In order to produce the swivel joint with little effort and thus inexpensively, it has proven to be advantageous that the first element and / or the second element and / or the spring component are formed with stamped sheet metal parts. In particular, if both the first element, the second element and the spring component are formed with sheet-metal stamped parts, the swivel joint can be manufactured both robustly and with reduced effort. Sheet metal stampings can also be easily adapted to a particular application, for example depending on the planned use of a swivel joint a shape of a first element and / or second element can be adapted to a shape of beams to be connected.

It is preferably provided that the first element and / or the second element and / or the spring component are each formed with only one sheet metal stamped part, in particular each consist only of a single sheet metal stamped part. This further reduces the manufacturing outlay and also reduces the susceptibility to errors, since the swivel joint is formed with a particularly small number of individual components. In particular, it is correspondingly advantageous if both the first element, the second element and the spring component are each formed from only one sheet-metal stamped part.

A work trestle, in particular a wooden work trestle, is advantageously provided, having a work rest which is supported by at least one pedestal, the work rest and the pedestal being connected by a swivel joint according to the invention, so that the pedestal can be rotated relative to the work rest. By connecting the work rest and the base to a swivel joint according to the invention, a robust work trestle is created which can be operated particularly easily and with little effort by a user. In the case of a work trestle, a swivel joint, which connects the work rest to a pedestal, usually represents a particularly stressed component. Constantly changing forces acting on the swivel joint in an environment that is frequently contaminated lead to high loads on the

Swivel. Due to the high loads to which a work trestle is exposed, a work trestle can be regarded as a wear device. This is reflected in the demands placed on a workhorse, such as low-cost and cost-reduced producibility with high robustness and

Resilience. In addition, a workhorse should be adapted to efficient ones

Work processes on a modern construction site, be as simple and safe to use as possible. According to the designs, features and effects of a swivel joint described above, a particularly robust, robust and simple and safe-to-use rotatable connection between the work rest and the pedestal of the work stand is achieved by connecting them to a swivel joint according to the invention. In this way, a work trestle with high robustness, resilience and simple and safe operability by a user is created. By connecting the work surface with the at least one base of the

Work stand by a swivel joint according to the invention, the stand can be rotated into a desired position depending on the application. The fact that the rotation requires a predetermined torque ensures that a rotational position of the base set by a user relative to the work support is also maintained with respect to smaller external loads, for example when the work trestle is carried around on a construction site. This ensures simple and, above all, safe operability. A particularly robust and easy-to-use work trestle is achieved when all the feet of the work trestle are rotatably connected to the work rest by swivel joints according to the invention. Depending on the specific design of the feet, the feet of the work trestle can be rotated by rotating the feet relative to the work surface into rotational positions coordinated with an existing surface. In a simple manner, the feet can also be rotated accordingly into a particularly stable working position or into a space-saving storage position or transport position.

It is advantageous if the at least one base is supported by a support with the

Work pad is connected, wherein the pivot joint connects the base and the support. Through such an indirect connection of the base with the

Work support over a support makes it easier to rotate the stand relative to the work support, since a component to be rotated only extends from a base to the support and not from a base to the work support.

A particularly space-saving storage position of the work trestle is achieved if several parts of the work trestle are connected by one or more coupling devices in such a way that the work trestle can be divided into several parts or several parts of the work trestle can be pivoted or folded relative to one another, in particular can be folded together. In combination with a rotatability of the at least one pedestal of the work trestle, the individual parts of the work trestle can be transported or stored particularly easily. Depending on the application, the work trestle or its components can be made of iron, steel, in particular stainless steel, brass, aluminum, plastic,

Composites or another suitable material may be formed. It is particularly preferably provided that the work trestle is formed with wood. As a result, the work trestle can be made both robust and inexpensive.

Further characteristics, advantages and effects result from the following

illustrated embodiments. In the drawings, to which reference is made here: FIG. 1 shows a swivel joint according to the invention;

2 shows a cross section of the swivel joint according to the invention from FIG. 1;

3 shows an exploded view of a first element of the swivel joint according to the invention with a displacement element for locking the first element with a second element;

Fig. 4a to Fig. 4c embodiment variants of a second element of a

swivel joint according to the invention;

5a to 5c show a spring component of a swivel joint according to the invention formed with a curved plate in different views;

6 shows a first element formed with a sheet metal stamped part immediately after a stamping process;

7 shows a second element formed with a sheet metal stamped part immediately after a stamping process;

8a to 8c a foldable work trestle with a work support supported by feet, the work support and the feet being rotatably connected by swivel joints according to the invention.

1 shows a schematic representation of a swivel joint 1 according to the invention, which rotatably connects two beams 4, a first element 2 being connected to a beam 4 and a second element 3 being connected to the other beam 4. The first element 2 and the second element 3 are with a bolt 5 around one

The axis of rotation of the bolt 5 is rotatably connected relative to one another, shown in detail in FIG. 2. In order to form a swivel joint 1 with high robustness and durability, which also enables simple and flexible handling or operation by a user, the first element 2 is also provided the second element 3 by a elastic deformation of at least one spring component 7 connected by friction, so that the first element 2 rotates relative to the second element 3

predetermined torque required. A corresponding structure of the swivel joint 1 can be seen in FIG. 2. Also shown in FIG. 1 is a locking device in order to lock the first element 2 relative to the second element 3 by a form fit. For this purpose, a displacement element 8 is provided, which is movably connected to the first element 2 in such a way that the displacement element 8 is connected to the

Sliding element 8 corresponding sliding element receptacle 9 can be inserted on the second element 3. This is implemented in a robust and compact manner in that the first element 2 has a displacement element receptacle 9, in which a displacement element 8 is movably arranged. For this purpose, the displacement element 8 is expediently held in the displacement element guide 10 with a displacement element cover 11 in such a way that it can be inserted by a user into a displacement element receptacle on the second element 3 in order to produce a locking by means of a positive fit or can be moved out of a displacement element receptacle by one Release locking by positive locking. A corresponding sliding element guide 10 is shown in FIG. 3.

A robust connection between the first element 2 and the second

To produce element 3 with the bars 4 connected to it, it is provided that the first element 2 and the second element 3 at least partially encompass the respective bars 4 connected to them. For this purpose, the first element 2 is cup-shaped with a shape corresponding to a beam section or beam cross-section. A corresponding first element 2 is shown in FIG. 3. For this purpose, the second element 3 has plate-shaped wings 20, the wings 20 being curved in accordance with a shape of an outer surface of the beam 4. A corresponding second element 3 is shown in FIG. 4c.

FIG. 2 schematically shows a cross section of the swivel joint 1 according to the invention shown in FIG. 1. The first element 2 and the second element 3 each have one

Bore on, through which the bolt 5 is passed and the first element 2 and the second element 3 rotatably connects positively about an axis of rotation of the bolt 5. For this purpose, the bolt 5 has varying outer diameters, which expediently have a bolt head or bolt collar and one on the bolt 5 screwed nut 6 are formed. The spring component 7 is arranged on a side of the second element 3 facing away from the first element 2, as a result of which the spring component 7 is well protected against external loads. In order to make the swivel joint 1 particularly resilient, it is provided that the spring component 7 is formed with a plate which is curved in such a way that the plate has an elastic spring behavior. The spring component 7 or the curved plate is shown in detail in FIGS. 5a to 5c.

2 that the spring component 7 is arranged between the second element 3 and the nut 6 screwed onto the bolt 5. In this way, an elastic degree of deformation or a strength of a frictional connection between the first element 2 and the second element 3, which arises due to the elastic deformation of the spring component 7, can be adjusted or controlled with the nut 6. In order to avoid a possible unwanted lateral displacement of the spring component 7, the spring component 7 has a through opening in the form of a

Spring component bolt bore 21 through which the bolt 5 is passed in order to arrange the spring component 7 in a form-fitting manner around the bolt 5. In this way, the spring component 7 is elastically deformed by a force acting in the direction of the axis of rotation of the bolt 5 between the first element 2 and the second element 3, and a frictional connection, in particular directly, is produced between the first element 2 and the second element 3. It is advantageously provided that a frictional engagement is implemented between two surfaces of the first element 2 and second element 3 that are oriented substantially perpendicular to the axis of rotation. Forces are efficiently transmitted between the first element 2 and the second element 3 and a robust frictional engagement is achieved. Furthermore, the sliding element 8 on the first element 2 for locking is shown in FIG. 2. This is in one

Locking position and, as stated above, establishes a locking between the first element 2 and the second element 3 by the sliding element 8

is positively inserted into a displacement element receptacle 9 on the second element 3.

FIG. 3 shows a schematic exploded view of the first element 2 shown in FIG. 1 with a displacement element 8 for locking the first element 2 with a second element 3. The cup-shaped shape of the first element 2 described above for positively receiving a beam 4 can be seen. Further The sliding element guide 10 is shown, in which the sliding element 8 is arranged so that it can move, so that the sliding element 8 can be positively inserted by a user into one corresponding to the sliding element

Sliding element receptacle 9 is insertable on the second element 3. This is practically implemented in that the sliding element 8 with a

Sliding element cover 11 is held in the sliding element guide 10, wherein the sliding element cover 11 has an opening to facilitate access for the user to the sliding element. The displacement element expediently has an actuation section which is formed with a curvature of the displacement element 8 in order for an operator to actuate the

Sliding element 8 to facilitate.

4a to 4c show different configurations of a second element 3, which essentially differ by their form of connection with the beam 4

differentiate.

4a shows a second element 3, which is plate-shaped. The second element 3 has a bolt bore 12 through which the bolt 5 can be passed. Two sliding element receptacles 9 can also be seen, into which a sliding element 8 described above can be inserted in order to lock the first element 2 relative to the second element 3. The two displacement element receptacles 9 shown are rotated approximately 90 ° with respect to one another with respect to an axis of rotation of the bolt 5, so that the first element 2 is locked relative to the second element 3 at two rotational positions rotated relative to one another by approximately 90 °. It goes without saying that it is favorable to have a plurality of further displacement element receptacles 9 in others

Provide rotational positions so that a locking at further angles of rotation between the first element 2 and the second element 3 is made possible.

Guide recesses 13 in the form of

Circular arc-shaped incisions on the second element 3. It is provided that guide pins on the first element 2 corresponding to the guide recesses 13 are positively inserted into the guide recesses 13 in order to implement guidance between the first element 2 and the second element 3. In order to achieve robust guidance, two guide recesses 13 are provided, which are arranged substantially opposite one another about the axis of rotation of the bolt 5 or the bolt bore 12. In particular, the guide recesses 13 are designed in the form of quarter-circle-arcuate incisions, whereby a

Rotation angle range of about 90 ° is possible. The guide pins can be formed, for example, with screws or cylindrical pins, which are connected to the first element 2 corresponding to the guide recesses 13. In addition, FIG. 4a shows boreholes for connecting the second element 3 to the bolt 5, for example with screw connections. FIG. 4b shows a second element 3, which corresponds with the second element 3 of FIG. 4a with respect to a bolt bore 12, displacement element receptacles 9 and guide recesses 13. In contrast to the second element 3 shown in FIG. 4a, the second element 3 of FIG. 4b has a plurality of plate-shaped wings 20, the wings 20 corresponding to an outer surface one with the second

Element 3 to be connected beams 4 are formed. This enables a robust and permanent connection between the second element 3 and the beam 4. In addition, the second element 3 has boreholes in order to connect the second element 3 with the bolt 5, for example with screw connections. 4c shows a second element 3, which is related to a function of

Bolt bore 12, displacement element receptacles 9 and guide recesses 13 coincide with the second elements 3 of FIG. 4a and / or FIG. 4b. The second element 3 shown in FIG. 4c has, corresponding to the second element 3 of FIG. 4b, a plurality of plate-shaped wings 20, the wings 20 corresponding to one

Outer surface of a beam 4 to be connected to the second element 3 are shaped in order to robustly connect the second element 3 to the beam 4

ensure. Expediently, the second element 3 also has spacing shoulders 22 around a beam 4 of components of the component 3 connected to the second element 3

Spacing hinge 1, which are movably connected to the second element 3, such as the bolt 5 or one with the bolt 5th

connected nut 6. In addition, drill holes can be seen in the second element 3 in order to connect the second element 3 with the bolt 5, for example with screw connections. 5a to 5c show a spring component 7, formed with a curved plate, of a swivel joint 1 according to the invention in different views. For a robust and resilient rotary movement, it is provided that the curved plate is in one

Cross section at least in sections has two non-parallel legs, which at substantially the same angles with one connecting the legs

Plate section are connected, particularly visible in Fig. 5c. The spring component 7 also has on two opposite sides of the spring component 7 plane, in

Support surfaces 23 aligned essentially parallel to one another in order to distribute deformation forces acting on the spring component 7 over a larger area

Record, whereby the wear resistance of the spring component 7 is increased.

Alternatively, the spring component 7 can also be designed as a plate spring.

Furthermore, the spring component 7 shown also has a spring component bolt bore 21 in order to guide the bolt 5 through it. As stated above, this prevents possible undesired displacement or slipping of the spring component 7 by a positive connection with the bolt 5.

For low-cost and inexpensive production, it has proven to be advantageous that the first element 2, the second element 3 and the spring component 7 are formed with stamped sheet metal parts. It is also preferred for a low susceptibility to errors if the first element 2, the second element 3 and the spring component 7 are each formed from only one stamped sheet metal part. FIG. 6 schematically shows a first element 2 formed from a stamped sheet metal part, in particular in accordance with an embodiment shown in FIG. 1, immediately after a stamping process. FIG. 7 schematically shows a second element 3 formed from a stamped sheet metal part, in particular in accordance with an embodiment shown in FIG. 4c, immediately after a stamping process. It can be seen that a basic structure of the first element 2 and the second element 3 can be punched out of a flat plate in a simple and quick manner and then can be converted into a shape as shown above by bending. The same applies to a simple shape of a spring component 7 shown above. This makes it possible to have a robust and resilient swivel joint 1 according to the invention

Manufacturing design with little effort cost-effectively. It goes without saying that a description and distinction between a first element 2 and a second element 3 in the illustrated embodiment variants and examples is only due to an understandable explanation of the invention and is not to be assessed or understood as a content-limiting factor. In this way, the first element 2 and the second element 3 can be interchanged in any way with regard to their specific configuration and / or orientation, or their characteristics can be combined. For example, it can be provided that both the first element 2 and the second element 3 are cup-shaped, for example as shown in FIG. 3. Likewise, the first element 2 can also be expediently formed in accordance with an embodiment shown in FIGS. 4a to 4c. It can also be advantageous if the spring component 7 is arranged on the first element 2, for example analogously to an arrangement shown in FIG. 2.

8a to 8c schematically show a foldable work trestle 14 in three different states of a collapsing process in order to bring the work trestle 14 from a stable and robust working state into a space-saving storage state. The work trestle 14 comprises one supported by two feet

Work pad 15, the work pad 15 and the feet by

Swivel joints 1 according to the invention are rotatably connected. A respective stand 16 can thus be easily, practically and safely in a desired

Rotational position can be rotated relative to the work surface 15. In particular, this also enables the work trestle 14 to be rotatable from a working position in which a longitudinal extension of a respective stand 16 is oriented substantially vertically to a longitudinal extension of the work rest 15 into a storage position in which the longitudinal extension of the stand 16 is essentially parallel to

Longitudinal extension of the work surface 15 is aligned. The feet are connected by supports 17 to the work surface 15, the pivot joints 1 connecting the feet to the supports 17. To increase the load-bearing capacity of the work stand 14, the supports 17 are connected by a stiffening component 18.

In order to achieve a particularly space-saving storage position, it is provided that the work support 15 and the stiffening component 18 each have a coupling device 19 formed with a hinge, so that two parts of the work trestle 14 can be folded relative to one another and the parts of the work trestle 14 in particular are collapsible. The hinges have corresponding axes of rotation, which are essentially vertical to a longitudinal extent of the work surface 15. In addition, it is provided that the coupling devices 19 have closures designed as clamp closures in order to secure the hinges against unwanted folding.

8a shows the work trestle 14 in a normal working state, in which a longitudinal extension of the feet is oriented essentially vertically to a longitudinal extension of the work rest 15. The swivel joints 1 are in a locked state and the coupling devices 19 are secured against folding by quick-release fasteners. In order to bring the work stand 14 from the working state into the storage state, the detents of the swivel joints 1 are released and the swivel joints 1 are rotated by approximately 90 °, so that the longitudinal extension of the feet is aligned essentially parallel to the longitudinal extension of the work rest 15. This state is shown in Fig. 8b. Then the quick fasteners of the

Coupling devices 19 released so that the hinges can be folded. By folding the parts of the work stand 14 connected by the hinges onto one another, the work stand 14 is brought into a space-saving storage state, shown in FIG. 8c.

A swivel joint 1 according to the invention makes it possible to design a work trestle 14 to be particularly robust and resistant, and also to make it simple and flexible

To ensure handling by a user. In that the first element 2 and the second element 3 of the swivel joint 1 are connected in a frictionally engaged manner by an elastic deformation of at least one spring component 7, so that the first element rotates

Element 2 requires a predetermined torque relative to the second element 3, the swivel joint 1 itself is robust and resistant and can also be designed

ensures that a rotational position is maintained in the event of smaller external loads, for example when a work trestle 14 is carried around. This prevents unwanted independent turning.

For high resilience and wear resistance, it has proven to be advantageous if the spring component 7 is formed with a curved plate which is arranged in a form-fitting manner around the bolt and in the direction of an axis of rotation of the Bolt 5 is elastically deformed. In addition, by expediently providing that the first element 2 is rotated relative to the second element 3 with a guide, a robust and stable rotary movement is ensured. In order to produce a load-bearing connection of the first element 2 or the second element 3 with a beam 4, the first element 2 and / or the second element 3 have wings 20 shaped according to a shape of an outer surface of the beam 4, which wings 4

in particular, embrace positively. It has proven particularly useful if the first element 2 and / or the second element 3 is cup-shaped. A swivel joint 1 according to an embodiment according to the invention can be produced in particular with little effort and at a reduced cost if the first element 2, the second element 3 and the spring component 7 are formed from stamped sheet metal parts.

Due to its robustness, ease of use and ease of manufacture, a swivel joint 1 according to the invention is particularly suitable, beams 4 one

Work stand 14 to connect. Particularly when a work rest 15 and legs of the work stand 14 are connected by swivel joints 1 according to the invention, a robust and easy-to-use work stand 14 is created.

Claims

1. swivel joint (1) for movably connecting two beams (4) one

Work trestles (14), the swivel joint (1) comprising a first element (2) which can be connected to one of the beams (4) and a second element (3) which is connected to the other

Beam (4) can be connected, the two elements (2, 3) being connected to at least one bolt (5) so as to be rotatable relative to one another about an axis of rotation of the bolt (5), characterized in that the two elements (2, 3 ) are connected to one another by elastic deformation of at least one spring component (7) so that rotating the first element (2) relative to the second element (3) requires a predetermined torque.

2. Swivel joint (1) according to claim 1, characterized in that the

Spring component (7) is elastically deformed by a force acting approximately in the direction of the axis of rotation of the bolt (5).

3. Swivel joint (1) according to one of claims 1 or 2, characterized in that the spring component (7) is arranged in a form-fitting manner around a portion of the bolt (5) that a movement of the spring component (7) in a direction transverse to one Longitudinal axis of the bolt (5) is only possible to a limited extent.

4. Swivel joint (1) according to one of claims 1 to 3, characterized in that the spring component (7) is formed with a plate curved in such a way that the plate has an elastic spring behavior.

5. swivel joint (1) according to claim 4, characterized in that the curved plate has at least in sections a cross section two non-parallel legs which are connected to a plate section connecting the two legs.

6. swivel joint (1) according to one of claims 1 to 5, characterized in that a rotation of the first element (2) relative to the second element (3) takes place with a guide.

7. swivel joint (1) according to claim 6, characterized in that an element (2, 3) has a guide recess (13), into which a guide pin corresponding to the guide recess (13) is inserted on the other element in a form-fitting manner.

8. swivel joint (1) according to one of claims 1 to 7, characterized in that a maximum and / or minimum angle of rotation between the first element (2) and the second element (3) is clearly defined.

9. swivel joint (1) according to one of claims 1 to 8, characterized in that the first element (2) can be locked relative to the second element (3) at defined angles of rotation, in particular a maximum and / or a minimum angle of rotation.

10. swivel joint (1) according to claim 9, characterized in that the first

Element (2) can be locked relative to the second element (3) by a form fit.

11. Swivel joint (1) according to claim 9 or 10, characterized in that the first element (2) can be locked relative to the second element (3) by a frictional connection.

12. Swivel joint (1) according to one of claims 1 to 11, characterized in that the first element (2) and / or second element (3) is designed to be connectable to a bar (4) in such a way that the first element (2) and / or second element (3) at least partially engages around the bar (4) in a form-fitting manner.

13. Swivel joint (1) according to claim 12, characterized in that the first element (2) and / or second element (3) is designed such that it can be connected to a bar (4) such that the first element (2) and / or the second element (3) a section of the respective beam (4) along a circumference of the beam (4)

embraces positively.

14. Swivel joint (1) according to one of claims 1 to 13, characterized in that the first element (2) and / or the second element (3) and / or that

Spring component (7) are formed with sheet metal stampings.

15. Swivel joint (1) according to claim 14, characterized in that the first element (2) and / or the second element (3) and / or the spring component (7) are each formed with only one sheet metal stamped part.

16. work trestle (14), in particular a wood trestle, having a

Work rest (15) which is supported by at least one stand (16), characterized in that the work rest (15) and the stand (16) by a

Swivel joint (1) according to one of claims 1 to 15, so that the

Stand (16) is rotatable relative to the work surface (15).

17. trestle (14) according to claim 16, characterized in that the at least one pedestal (16) is connected by a support (17) to the work support (15), the pivot joint (1) the pedestal (16) and the support (17) connects.