Clamp with rotatable feed device

Abstract

The invention relates to a clamp comprising: a slide rail (16); a fixed bracket (12) which is seated on the slide rail (16); a counterpart bracket (14), in relation to which the slide rail (16) is slideable; an advancing device (18) on which the slide rail (16) is slideably mounted and to which the counterpart bracket (14) is non-slideably connected; an actuating apparatus (54) which is disposed on the advancing device (18) and by means of which the sliding of the slide rail (16) can be actuated in an advancing direction (90); and a blocking device (20) by means of which the sliding of the slide rail (16) in a direction (138) counter to the advancing direction (90) can be blocked; wherein the actuating apparatus (54) is rotatable with respect to the slide rail (16) and rotatable with respect to the blocking device (20), and wherein the blocking device (20) is non-rotatable with respect to the slide rail (16).

Description

[0001] Clamp with rotating feed device

[0002] The invention relates to a clamp, comprising a clamping rail, a fixed bracket which is seated on the clamping rail, a counter bracket relative to which the clamping rail is displaceable, a feed device on which the clamping rail is displaceably mounted and to which the counter bracket is connected in a displacement-fixed manner, an actuating device which is arranged on the feed device and via which a displacement of the clamping rail in a feed direction can be actuated, and a locking device by means of which a displacement of the clamping rail in a direction opposite to the feed direction can be locked.

[0003] US 2006 / 0049563 Al discloses an extension for a clamp.

[0004] WO 01 / 56746 A1 discloses a clamping device with a clamping rail that is displaceably guided in its longitudinal direction and an actuating device comprising a gripping element by means of which the clamping rail can be displaced. A first contact element and a second contact element are held on the clamping rail. The clamping rail is displaceable relative to the first contact element, and the first contact element is rotatable relative to the actuating device.

[0005] The invention is based on the object of providing a clamp of the type mentioned above which has extensive operating options.

[0006] This object is achieved according to the invention in the clamp mentioned above in that the actuating device is rotatable relative to the clamping rail and rotatable relative to the locking device, and that the locking device is rotationally fixed relative to the clamping rail. With the clamp according to the invention, it is possible to bring the actuating device, via which an operator actuates the clamp, into a rotational position relative to the clamping rail that is suitable for an application.

[0007] During such a rotation, the locking device's non-rotatable arrangement prevents it from rotating. The locking device remains in its position with respect to rotation.

[0008] This allows the feed mechanism to be separated from the locking device. This makes it possible, in particular, for the feed mechanism to be actuated to advance the clamping rail in any rotational position of the actuating device relative to the clamping rail.

[0009] This allows the clamp to be optimally adapted to the respective application, and the actuating device can be rotated to provide optimal access for the operator. The actuating device can be positioned by the operator so that it does not collide with otherwise obstructive elements of the application.

[0010] The actuating device is rotatable relative to the fixed bracket and is in particular also rotatable relative to the counter bracket.

[0011] It is advantageous if the locking device is fixedly connected to the feed device and the clamping rail is movable relative to the locking device. The clamping rail can then be mounted movably on the combination of locking device and feed device. This makes it easy to implement the feed action of the feed device and the locking action of the locking device. The feed device is rotatable relative to the locking device. For the same reason, it is advantageous if the clamping rail is mounted movably on the locking device. This makes it easy to implement the locking function of the locking device.

[0012] It is advantageous if at least one of the following is provided: in the case of a clamping function, the locking device is positioned between the fixed bracket and the feed device; in the case of a spreading function, the feed device is positioned between the locking device and the fixed bracket.

[0013] Positioning the locking device between the fixed bracket and the feed device during the clamping function results in a structurally simple design. In particular, at least within a certain rotational position range of the actuating device relative to the clamping rail, the locking device can be operated by the same holding hand that also operates the actuating device or holds the clamp on the actuating device. This particularly enables one-handed operation.

[0014] A spreading function can be easily implemented if the fixed bracket is arranged accordingly.

[0015] In an advantageous embodiment, the counter bracket is mounted on the locking device, in particular with at least one of the following: the counter bracket is mounted on the locking device in a displacement-proof manner; the counter bracket is mounted on the locking device in a rotationally fixed manner.

[0016] This allows for a clamp with a simple design. The number of required components can be kept to a minimum. This also reduces the weight of the clamp. Furthermore, one-handed operation is easily achieved. The counter-arm is specifically aligned with the fixed arm, and the only relative movement between the counter-arm and the fixed arm is linear displacement.

[0017] From a design perspective, it is advantageous if a region of the feed device on which the actuating device is arranged is rotatably mounted on the tensioning rail. This makes it easy to rotate the actuating device. Furthermore, it is easy to achieve that the tensioning rail can be advanced via the feed device at any rotational position of the actuating device. This is achieved, for example, by a feed element or a feed element package being arranged on the feed device in a rotationally fixed manner with respect to the tensioning rail, and the part of the feed device on which the actuating device is arranged being able to rotate relative to this feed element or feed element package.

[0018] In a structurally advantageous embodiment, a housing for the feed mechanism is rotatably mounted on the clamping rail. The actuating device is located on the housing. This provides a wide range of operating options for the user.

[0019] In a structurally advantageous embodiment, at least a portion of the feed device is rotatably mounted on the locking device. This allows, in particular, a connecting device between the feed device and the locking device to be designed as a pivot bearing to securely connect the two.

[0020] It is advantageous if the axis of rotation of the actuating device relative to the clamping rail is parallel to the feed direction. This provides extensive operating options. A pivot bearing for the actuating device's rotation relative to the clamping rail can be designed to be continuously variable or to have a plurality of discrete steps and, in particular, locking steps. With a continuously variable design, any desired angle of rotation can be set. For example, a spring load ensures the appropriate force connection to maintain a set rotational position. If a plurality of discrete steps and, in particular, locking steps are provided, a set rotational position can be easily maintained via positive locking. This prevents the actuating device from "twisting" from a set rotational position due to its own weight.

[0021] It is advantageous if at least one of the following is provided: a housing of the feed device is mounted on the clamping rail via a first pivot bearing so as to be rotatable about a first axis of rotation; a housing of the feed device is mounted on the locking device via a second pivot bearing so as to be rotatable about a second axis of rotation; the first axis of rotation and the second axis of rotation are coaxial.

[0022] This makes it possible to implement a pivot bearing in a structurally simple manner by means of the first pivot bearing and the second pivot bearing for the rotation of the actuating device relative to the tensioning rail. The pivot bearing can be designed over a large length range with respect to the tensioning rail, so that high stability and rigidity can be achieved. In particular, the tensioning rail is movably mounted both on the feed device and on the locking device. It is then possible to implement a rotatability of the actuating device in a structurally simple manner via the rotatability of the housing of the feed device relative to the tensioning rail. In one embodiment, the first pivot bearing comprises a first sleeve with a first opening, wherein the tensioning rail is guided through the first opening and is mounted on the sleeve for linear displacement and rotation therewith, and the first sleeve is seated on the housing.This makes it easy to create a pivot bearing using the first sleeve, in which the housing, in particular, forms an outer shaft. The first sleeve then serves as both a linear guide for the clamping rail and part of the pivot bearing for the rotation of the housing.

[0023] In one embodiment, the first sleeve is associated with a counter-element that engages the first sleeve to establish discrete rotational positions, wherein (i) the first sleeve has a locking ring, or (ii) the counter-element has a locking ring. With such a design, discrete rotational positions can then be set and secured.

[0024] It is particularly advantageous if the first sleeve is at least partially located within the housing. This results in a compact design. An external shaft can be easily implemented via the housing.

[0025] Furthermore, it is advantageous if the second pivot bearing has a second sleeve with a second opening, wherein the tensioning rail is guided through the second opening and is mounted on the second sleeve for linear displacement and rotation. The second sleeve can be used to create both a pivot bearing for the rotation of the actuating device relative to the tensioning rail and a sliding bearing for the tensioning rail. The second sleeve forms, for example, an inner shaft, or the second sleeve cooperates with a counter element of the housing, which then forms an outer shaft.

[0026] To create discrete rotational positions, a counter element can be assigned to the second sleeve, which engages the second sleeve to create discrete rotational positions, wherein (i) the second sleeve has a locking ring, or (ii) the counter element has a locking ring. In particular, a corresponding anti-rotation device can be provided on both the first sleeve and the second sleeve to create discrete rotational positions, or only on the first sleeve or the second sleeve.

[0027] It is possible for the second sleeve to be (i) arranged on the locking device and inserted into a housing of the feed device, or (ii) arranged on a housing of the feed device and inserted into a recess of the locking device. In the first case (i), the housing of the feed device forms an outer shaft. In the second case (ii), the second sleeve forms an inner shaft. This results in a stable design with a pivot bearing that minimizes tilting moments and the like.

[0028] It is advantageous if the feed device has at least one feed element on which the actuating device acts, wherein the at least one feed element is rotationally fixed with respect to the tensioning rail. This results in a simple structural design. To a certain extent, the conventional solution with a feed element for advancing the tensioning rail can be used. The actuating device can then be easily rotated, in particular by a housing of the feed device, in which the at least one feed element is located and on which the actuating device is arranged, being rotatable about the at least one feed element.

[0029] It is particularly advantageous if the at least one feed element has an engagement surface for the actuating device which has a ring shape and in particular a circular ring shape. As a result, in any rotational position of the actuating device, the actuating device can act on the at least one feed element in order to effect an advance of the tensioning rail. This means that, for example, a clamping effect via the actuating device is independent of the rotational position of the actuating device relative to the tensioning rail. For the same reason, it is advantageous if the engagement surface for the actuating device surrounds the tensioning rail in a ring shape. The actuating device can then act on the at least one feed element in order to effect an advance of the tensioning rail.

[0030] It is advantageous if the at least one feed element has a continuous opening through which the clamping rail is guided in a rotationally fixed manner.

[0031] This makes it easy to achieve a feed movement.

[0032] It is advantageous if at least one feed element is positioned in a housing of the feed device. This results in a protected arrangement.

[0033] It is advantageous to provide a feed element package with a plurality of feed elements, with adjacent feed elements in particular touching each other. This allows for a high clamping or spreading force.

[0034] In a structurally advantageous embodiment, the actuating device comprises an actuating lever pivotable about a pivot axis, in particular having at least one of the following: the pivot axis is oriented transversely and in particular perpendicularly to the feed direction; the pivot axis is oriented transversely and in particular perpendicularly to a rotational axis of the rotational mobility of the feed device relative to the clamping rail. This results in simple operability. An operator can hold and operate the clamp using the actuating device. In particular, a one-hand clamp can be realized, i.e., a clamp with one-hand operation.

[0035] Advantageously, the actuating device has a fixed holding element spaced apart from the actuating lever. The fixed holding element serves as a gripping element for an operator's hand. The operator can use it to hold the clamp. Furthermore, the operator's holding hand can be supported on the holding element to pivot the actuating lever.

[0036] In a structurally advantageous embodiment, the feed device comprises at least one feed element which is actuated by the actuating lever. Starting from an initial position of the at least one feed element, upon actuation of the actuating lever, the at least one feed element is inclined towards the clamping rail, with the at least one feed element being canted on the clamping rail, and the clamping rail is driven along with a linear displacement in the feed direction. In this way, a linear feed of the clamping rail can be achieved in a simple manner by pivoting the actuating lever, and a corresponding clamping force or spreading force can be exerted. In particular, an eccentric arrangement is provided in order to convert a corresponding pivoting movement into a linear movement.

[0037] In an advantageous embodiment, a spring device is provided which is supported on the at least one feed element, wherein a spring force of the spring device strives to bring the at least one feed element into its starting position relative to the clamping rail or to hold it there. It is therefore easily possible to effect a feed by actuating the actuating lever (countering the effect of the spring force of the spring device). When an operator releases the actuating lever, the at least one feed element returns to its starting position and the actuating lever also returns to its starting position. A further feed can then be carried out. The spring device, which is supported on the at least one feed element, can also be used to non-positively maintain a rotational position of the actuating device relative to the clamping rail.In particular, it is provided that the spring device is supported on a part of the feed device that is rotatable. (The at least one feed element is, in particular, not rotatable relative to the clamping rail.)

[0038] It is advantageous if the locking device has a release element, and in particular a release lever, for removing the locking mechanism. An operator can then use the release element to release the locking mechanism and can then, to a certain extent, freely move the clamping rail toward the locking device and the feed mechanism.

[0039] In a structurally simple embodiment, the locking device comprises at least one locking element and, in particular, comprises a locking element stack, wherein the at least one locking element has a through-opening through which the tensioning rail is guided, and wherein, in a locked position of the at least one locking element, the at least one locking element is canted with the tensioning rail. The locking device makes it easy to prevent the tensioning rail from being displaced counter to the feed direction. This makes it easy to achieve a clamping or spreading effect between the fixed bracket and the counter bracket. Clamping or spreading can be achieved, so to speak, via a pumping process. The feed device "pumps" the tensioning rail in the feed direction, while the locking device prevents displacement in the opposite direction.

[0040] It is advantageous if a spring device is provided which is supported on the at least one locking element, wherein a spring force of the spring device strives to bring or hold the at least one locking element into its locked position. The position of the at least one locking element without operator intervention is thus the locked position. This prevents displacement in the opposite direction to the feed direction. This locked position can only be released by operator intervention by overcoming the spring force of the spring device, in particular to enable free displacement of the clamping rail.

[0041] In a structurally advantageous embodiment, a release element is provided which acts on the at least one locking element and via which an angular position of the at least one locking element relative to the tensioning rail can be adjusted. This allows the locking position to be easily released by adjusting the required angular position accordingly.

[0042] It is advantageous if at least one of the following is provided: the fixed bracket is removably mounted on the clamping rail; a clamping function is provided in which the feed direction is a direction of movement of the fixed bracket towards the counter bracket; a spreading function is provided in which the feed direction is a direction of movement of the fixed bracket away from the counter bracket; the clamping rail has a plurality of fixing positions for the fixed bracket and in particular fixing positions are located in the region of opposite ends of the clamping rail.

[0043] This opens up a wider range of possible applications. In particular, by repositioning the fixed bracket on the clamping rail, a spreading function can be implemented, starting from a clamping function. It is particularly advantageous if the clamp is designed as a one-hand clamp, which can be held by an operator with one hand on the actuating device and in which the clamping rail can be advanced in the feed direction via the actuating device with the holding hand. This leaves the operator with their other hand free to hold one or more workpieces or the like. The holding hand can also be used to rotate the actuating device into the desired position relative to the clamping rail.

[0044] It is advantageous if a release element of the locking device is arranged and designed in such a way that it can be operated by the hand of an operator holding the clamp on the actuating device, at least in a non-rotated position. This simplifies application possibilities.

[0045] The following description of preferred embodiments, in conjunction with the drawings, serves to explain the invention in more detail.

[0046] They show:

[0047] Figure 1 is a perspective view of an embodiment of a clamp according to the invention with a first rotational position of a feed device relative to a clamping rail;

[0048] Figure 2 shows the same view as Figure 1 with a second rotational position of the feed device relative to the clamping rail;

[0049] Figure 3 shows the same view as Figure 1 with a third rotational position of the feed device relative to the clamping rail;

[0050] Figure 4 is a view in the direction A according to Figure 1;

[0051] Figure 5 is a plan view of the clamp according to Figure 1; Figure 6 is a rear view of the clamp according to Figure 2 (corresponding to direction A according to Figure 1);

[0052] Figure 7 is a plan view of the clamp according to Figure 2;

[0053] Figure 8 is a rear view of the clamp according to Figure 3;

[0054] Figure 9 is a plan view of the clamp according to Figure 3;

[0055] Figure 10 is a rear view of the clamp according to Figure 1 in a fourth

[0056] Rotational position of the feed device relative to the clamping rail;

[0057] Figure 11 is a plan view of the clamp according to Figure 10;

[0058] Figure 12 is a sectional view taken along line 12-12 of Figure 5;

[0059] Figure 13 is a sectional view taken along line 13-13 of Figure 5;

[0060] Figure 14 is a sectional view taken along line 14-14 of Figure 5;

[0061] Figure 15 is a sectional view taken along line 15-15 of Figure 5;

[0062] Figure 16 is a plan view of the clamp according to Figure 1 in the direction B according to Figure 1;

[0063] Figure 17 is a sectional view taken along line 17-17 of Figure 4;

[0064] Figure 18 is a perspective view corresponding to Figure 1 with the housing cover removed;

[0065] Figure 19 is a plan view of the clamp according to Figure 18 (with the housing cover removed); Figure 20 is a view in the direction C according to Figure 19;

[0066] Figure 21 is a view in the direction D according to Figure 19; and

[0067] Figure 22 is a view in the direction E according to Figure 19.

[0068] An embodiment of a clamp according to the invention, which is shown in Figures 1 to 22 and designated by 10, comprises as essential components a fixed bracket 12, a counter bracket 14 for the fixed bracket 12, a tensioning rail 16, a feed device 18 and a locking device 20.

[0069] The tensioning rail 16 extends along a longitudinal axis 22 and is straight.

[0070] In one embodiment, the tensioning rail 16 has a rectangular envelope shape in cross-section, optionally with rounded or chamfered edges. In particular, the tensioning rail 16 is designed with a tapered profile (see Figures 1 and 16).

[0071] The tensioning rail 16 is made of a metallic material, for example.

[0072] The fixed bracket 12 sits firmly (immovably) on the tensioning rail 16. It is fundamentally possible that the fixed bracket 12 is not releasably fixed to the tensioning rail 16.

[0073] In one embodiment shown in the figures, the fixed bracket 12 is releasably fixed to the clamping rail 16. This makes it possible to replace the fixed bracket or to provide the clamp 10 with a clamping function and a spreading function. In particular, it is provided that the clamping rail 16 has a plurality of fixing positions for the fixed bracket 12. In one embodiment, the clamping rail 16 comprises a first fixing position 24 for the fixed bracket 12, wherein the first fixing position 24 is in the region of a first end 26 of the clamping rail 16. Furthermore, a second fixing position 28 is provided, which lies in the region of a second end 30 of the clamping rail 16 (see, for example, Figure 5). The second end 30 is opposite the first end 26.

[0074] When the fixed bracket 12 is fixed at the first end 26, a clamping function is realized, as shown in the figures. When fixed at the second fixing position 28, a spreading function can be realized for the clamp 10.

[0075] The fixed bracket 12 comprises a holding area 32, which is located on the tensioning rail 16 and via which the fixed bracket 12 can be (removably) fixed to the tensioning rail 16. In particular, a positive fixation is provided. The tensioning rail 16 has one or more through-openings 34 for this purpose.

[0076] A bracket element 36 is located on the holding area 32, which is oriented transversely to the longitudinal axis 22 of the tensioning rail 16 and extends away from the tensioning rail 16.

[0077] A contact element 38 is arranged on the bracket element 36, which serves to contact a workpiece.

[0078] The contact element is designed, in particular, as a plastic part. It forms a kind of cap that sits on the bracket element 36.

[0079] In one embodiment, the contact element 38 is replaceable. In the clamp 10, the contact element 38 is offset from the holding area 32 relative to the longitudinal axis 22 (see, for example, Figure 5). The contact element 38 is spaced further from the first end 26 relative to the longitudinal axis 22 than the holding area 32.

[0080] The contact element 38 is spaced from the clamping rail 16.

[0081] The counter bracket 14 is held on the tensioning rail 16 via a holding area 40. The locking device 20 forms the holding area 40, as explained in more detail below.

[0082] A bracket element 42 is located on the holding area 40. On the bracket element 42, in turn, there is a contact element 44, which is basically designed the same as the contact element 38 of the fixed bracket 12.

[0083] The contact element 44 of the counter bracket 14 is aligned with the contact element 38 of the fixed bracket 12. A line of alignment is parallel to the tensioning rail 16.

[0084] A force can be exerted on one or more workpieces, which rest on the contact elements 38, 44, via the fixed bracket 12 and the counter bracket 14.

[0085] The contact element 44 is arranged offset from the holding area 40 in a direction parallel to the longitudinal axis 22. The contact element 44 is located closer to the first end 26 than the holding area 40 in this direction.

[0086] The clamping rail 16 is slidably guided on the holding area 40 (of the locking device 20). A displacement direction 46 (direction and opposite direction) is parallel to the longitudinal axis 22. By displacing the clamping rail 16 in the displacement direction 46, the distance between the contact elements 38 and 44 can be varied, and a force can be exerted on one or more workpieces.

[0087] In a clamping function (as shown in the drawings), the fixed bracket 12 can be moved towards the counter bracket 14 by moving the clamping rail 16 in order to exert a clamping force on one or more workpieces between the contact elements 38 and 44.

[0088] Furthermore, to cancel the clamping effect, the fixed bracket 12 can be moved away from the counter bracket 14 by appropriately shifting the clamping rail 16. This will be explained in more detail below.

[0089] The feed device 18 serves to actively feed the clamping rail 16. It comprises a drive mechanism for the clamping rail 16. Furthermore, the feed device 18 serves to hold the clamp 10. In particular, the clamp 10 is designed as a one-hand clamp which can be held with one holding hand, wherein a feed movement by means of the feed device can also be actuated via the holding hand.

[0090] The feed device 18 has a housing 48 (see, for example, Figures 17, 18). The clamping rail 16 is mounted on the feed device 18 and, in turn, on the housing 48 via a displacement guide 50, so that it can be displaced in the displacement direction 46. The displacement guide 50 is designed, in particular, as a sliding guide and includes a sliding bearing device 52.

[0091] The locking device 20 and the holding area 40 are connected to the housing 48 (and thus to the feed device 18). The locking device 20 and the feed device 18 form a unit, relative to which the clamping rail 16 is displaceably mounted. The sliding bearing device 52 is arranged on the locking device 20 (the holding area 40) and the housing 48. The locking device 20 and the feed device 18 are connected to one another in a displacement-resistant manner.

[0092] As will be explained in more detail below, the feed device 18 is rotatable relative to the locking device 20 and the feed device 18 is rotatably mounted on the locking device 20.

[0093] An actuating device 54 is arranged on the housing 48. The actuating device 54 serves to hold the clamp 10 by an operator with a holding hand and to activate a feed of the clamping rail 16 via the feed device 18 by an operator.

[0094] The housing 48 has an approximately cuboid or cylindrical shape with a bottom 56, a wall 58 which is arranged on the bottom 56 and projects transversely therefrom, and a cover 60 (see Figure 18, the cover 60 being removed in Figures 18 to 22).

[0095] The wall 58 is formed circumferentially except for a passage area for the clamping rail 16. When the cover 60 is in place, the housing 48 is closed with an interior space 62 (see Figure 18).

[0096] The actuating device 54 comprises a holding element 64 (grip element) which is seated on the wall 58 and, in doing so, on a wall portion of the wall 58 which is spaced from the tensioning rail 16 in a direction transverse to the longitudinal axis 22. This wall portion is aligned at least approximately parallel to the tensioning rail 16.

[0097] The holding element 64 is arranged fixedly (i.e., immovably) on the housing 48. It is, for example, formed integrally on the wall 58. The holding element 64 lies in a rear region 66 of the housing 48, which is closer to the second end 30 of the clamping rail 16 than to the first end 26 of the clamping rail 16. The holding element 64 extends outward from the wall 58 transversely to the longitudinal axis 22 of the clamping rail 16. It is arranged and designed such that it can be grasped by a holding hand and via the palm of the hand by an operator. An operator can hold the clamp 10 as a whole via the holding element 64.

[0098] The actuating device 54 further comprises an actuating lever 68, which is mounted on the housing 48. The actuating lever 68 is pivotally mounted on a pivot bearing 70 about a pivot axis 72 (see, for example, Figure 4).

[0099] The pivot axis 72 is oriented transversely and in particular perpendicularly to the longitudinal axis 22 of the clamping rail 16.

[0100] The actuating lever 68 is arranged at a distance from the holding element 64 and is positioned such that an operator, when holding the holding element 64, can contact the actuating lever 68 via the fingers of the holding hand and can pivot about the pivot axis 72 and in particular can pivot towards the holding element 64.

[0101] The wall 58 of the housing 48 has an opening 74 which is formed in a wall part of the wall 58 which is oriented transversely to the wall part on which the holding element 64 is seated.

[0102] A first sleeve 76 is located at the opening 74. The first sleeve 76 is rotationally fixed with respect to the tensioning rail 16. The first sleeve 76 has a first opening 78 (see Figure 18) through which the tensioning rail 16 extends. The first opening 78 is adapted to the profile of the tensioning rail 16 and is designed such that the tensioning rail 16 is guided only displaceably, but not rotatably, at the first opening 78. The first sleeve 76 with the first opening 78 forms part of the plain bearing device 52. The first sleeve 76 is located on and in particular in the housing 48.

[0103] A contact area 80 is formed in the housing 48 (in the interior space 62 of the housing 48) above the pivot bearing 70 (see Figure 17). The tensioning rail 16 is guided through the contact area 80.

[0104] The contact area 80 is used to attach a feed element 82.

[0105] In the interior space 62, a feed element package 84 is arranged, which comprises a plurality of feed elements 82.

[0106] A feed element 82 is designed, for example, as a sheet metal part.

[0107] Adjacent feed elements 82 touch each other.

[0108] A feed element 82 has an opening 86 through which the clamping rail is inserted.

[0109] The feed element assembly 84 is designed such that the actuating lever 68 can act on the feed element assembly 84 upon pivoting toward the holding element 64. In particular, the actuating lever 68 acts with a lug 88 (see, for example, Figure 17) on the feed element 82 as the first feed element in the feed element assembly 84, which is closest to the contact area 80.

[0110] The feed element package 84 is designed such that it can be tilted with the clamping rail 16 and can be carried along via the actuating lever 68, wherein the clamping rail 16 is then displaced in a feed direction 90. The feed direction 90 is a direction of the displacement direction 46. In a clamping function of the clamp 10, in which the fixed bracket 12 is arranged in the region of the first end 26 (Figures 1 to 22), the feed direction 90 is a direction of movement of the clamping rail 16, in which the fixed bracket 12 moves towards the counter bracket 14 (see, for example, Figure

[0111] 17).

[0112] Starting from a starting position of the feed element assembly 84 (see, for example, Figure 17), the tensioning rail 16 can be moved by an operator using the actuating lever 68. The starting position 92 is a position in which the feed element assembly 84 rests with the outer feed element 82 against the contact area 80. In the starting position 92 of the feed element assembly 84, the tensioning rail 16 can be freely moved along the feed device 18 (if the locking device 20 is not taken into account).

[0113] In the initial position 92 of the feed element package 84, the actuating lever 68 is also in an initial position in which the actuating lever 68 has a maximum distance from the holding element 64. Starting from this initial position, the actuating lever 68 can be pivoted in a pivoting direction 94 (Figure 17) toward the holding element 64.

[0114] A spring device 96 is provided (see for example Figure

[0115] 18), which is supported on the feed element package 84 and thereby on the feed element 98, which is an outer feed element and faces away from the feed element 82. The spring device 96 is further supported on the first sleeve 76 or on a wall 100 in the housing 48, wherein the wall 100 is located adjacent to the sleeve 76.

[0116] The spring device 96 is arranged and designed such that it tends to press the feed element package 84 into its starting position 92 against the contact area 80. To pivot the actuating lever 68 in the pivoting direction 94, an operator must overcome the spring force of the spring device 96. When an operator releases the actuating lever 68, the spring device 96 presses the feed element package 84 into the starting position 92. The interior 62 of the housing 48 can be assigned an upper part 102 and a lower part 104 (see Figure 17). The lower part 104 and the upper part 102 are separated by the tensioning rail 16, which extends through the housing 48. The actuating device 54 is arranged adjacent to the lower part 104 on the housing 48.

[0117] The nose 88 of the actuating lever 68 is positioned in the lower part 104 and acts there on the feed element package 84.

[0118] Starting from the starting position 92, pivoting of the actuating lever 68 in the pivoting direction 94 due to engagement of the nose 88 on the feed element package 84 causes the feed element package 84 to tilt with the clamping rail 16. During this pivoting movement, the actuating lever 68 initially causes a change in the angular position of the feed element package 84 relative to the clamping rail 16. This leads to tilting of the feed element package 84 with the clamping rail 16.

[0119] In the embodiment shown (see, for example, Figure 17), the feed element package 84 in the starting position 92 has an angular position 106 to the longitudinal axis 22 relative to a surface of the feed element 82, which is approximately 90°.

[0120] In the illustrated embodiment (Figure 17), the corresponding angle 106 is slightly less than 90°, with the feed element assembly being inclined away from the counter bracket 14 in the initial position 92. The corresponding openings of the feed elements of the feed element assembly 84 are arranged and designed such that even at this inclination (if the locking device 20 is not taken into account), the tensioning rail 16 can still be freely displaced on the feed device 18.

[0121] When the actuating lever 68 is pivoted toward the holding element 64, the angle 106 decreases, causing the tilting. Further pivoting of the actuating lever 68 toward the holding element 64 causes the clamping rail 16 to be driven along and a linear displacement in the feed direction 90.

[0122] When the angle of the feed element package 84 changes due to pivoting of the actuating lever 68, in one embodiment the latter can be supported in the contact area 80 in the upper part 102 of the housing 48.

[0123] An eccentric is formed by the actuating lever 68 with the nose 88, the feed element package 84 and the contact area 80.

[0124] The pivot bearing 70 is particularly arranged and configured such that the pivot axis 72 penetrates the clamping rail 16 (see Figure 18). Thus, the pivot axis 72 lies between the upper part 102 and the lower part 104, and the nose 88 engages the feed element assembly 84 offset from the pivot axis 72.

[0125] The feed element assembly 84 has an engagement surface 108 for the nose 88 on the first feed element 82 (see Figure 19). This engagement surface 108 is annular and, in particular, surrounds the clamping rail 16 in a ring-shaped manner. As will be explained in more detail below, this makes it possible to realize a rotatable feed device 18 in which the actuating device 54 can be rotated with the actuating lever 68 relative to the clamping rail 16, wherein the feed element assembly 84 is not rotated along with it, and the nose 88 can nevertheless act on the feed element assembly 84 at any rotational position of the actuating device 54 relative to the clamping rail 16.

[0126] In one embodiment, the engagement surface 108 is formed as a circular ring.

[0127] In particular, the feed elements of the feed element assembly 84 are designed as annular discs. The locking device 20 also comprises a housing 110 on which the tensioning rail 16 is movably mounted. This housing 110 forms the holding area 40. The tensioning rail 16 is guided through the housing 110.

[0128] A second sleeve 112 (see, for example, Figure 17) is located on the housing 110, which has an opening through which the tensioning rail 16 is guided. The second sleeve 112 is part of the plain bearing device 52.

[0129] The second sleeve 112 protrudes beyond a side 114 of the housing 110, with the side 114 facing the housing 48 of the feed device 18. The second sleeve 112 is inserted into a corresponding receptacle 116 of the housing 48 of the feed device 18.

[0130] The housing 110 is rotationally fixed relative to the clamping rail 16 and displacement-fixed relative to the feed device 18.

[0131] The feed device 18 with the housing 48 and the actuating device 54 is rotatable via a pivot bearing 118 relative to the clamping rail 16 and, in turn, relative to the counter bracket 14 and the fixed bracket 12. A rotation axis 120 of the pivot bearing 118 is parallel to the longitudinal axis 22 and thus also parallel to the displacement direction 46.

[0132] The pivot axis 72 of the pivot bearing 70 of the actuating lever 68 is transverse and in particular perpendicular to the rotation axis 120.

[0133] The pivot bearing comprises a first pivot bearing 122 with a first rotation axis formed by the first sleeve 76. The first sleeve 76 is seated on a receptacle 126 of the housing 48, with the housing 48 forming, in a sense, an external shaft with the receptacle 126. The first sleeve 76 is rotationally fixed to the tensioning rail 16 (with the tensioning rail 16 being slidably mounted on the first sleeve 76), and the housing 48 is mounted on the receptacle 126 so as to be rotatable about the rotation axis 120 on the first sleeve 76.

[0134] The second sleeve 112 is positioned opposite the first sleeve 76. A second pivot bearing 124 of the pivot bearing 118 is formed by the receptacle 116, with a second axis of rotation. The first axis of rotation and the second axis of rotation coincide and form the axis of rotation 120.

[0135] In the area of ​​the second sleeve 112, the housing 48 with the receptacle 116 also forms a type of external shaft.

[0136] The feed element package 84 is positioned in the interior space 62 of the housing 48 between the first sleeve 76 and the second sleeve 112.

[0137] The housing 48 of the feed device 18 is rotatably connected to the locking device 20 by the second pivot bearing 124. The feed device 18 and the locking device 20 form a unit, relative to which the clamping rail 16 is displaceable in the displacement direction 46. In particular, the second pivot bearing 124 is designed such that a displacement-resistant connection is established between the feed device 18 and the locking device 20 via the combination of the receptacle 116 and the second sleeve 112.

[0138] For example, an annular formation is formed on the second sleeve 112, into which a bead dips, which is formed on the housing 48 and in particular the cover 60, in order to achieve a displacement-resistant connection.

[0139] In the embodiment shown and described, the second sleeve 112 is formed on the housing 110 of the locking device 20. In principle, it is also possible for a corresponding sleeve to be arranged or formed on the housing 48 of the feed device 18, which is then inserted into a corresponding receptacle in the housing 110. In this case, an internal shaft for the rotation of the housing 48 is formed by means of the second sleeve.

[0140] The feed device 18 is designed such that the actuating device 54 can rotate relative to the fixed bracket 12 and the counter bracket 14. The feed element assembly 84 is rotationally fixed with respect to the clamping rail 16. When the housing 48 rotates about the rotation axis 120, the nose 88 of the actuating lever 68 rotates about the rotation axis 120 and engages at different points on the engagement surface 108 depending on the rotational position. This is made possible by the annular design of the engagement surface 108.

[0141] Due to the described design of the feed device 18, a feed of the clamping rail 16 in the feed direction 90 can be activated by an operator via the actuating lever 68 in any rotational position of the actuating device 54 about the rotation axis 120.

[0142] At least one locking element 128 and in particular a locking element package 130 is arranged in the housing 110 of the locking device 20.

[0143] In the embodiment shown, the locking element package comprises two locking elements 128 which lie one above the other and touch each other.

[0144] A locking element 128 has a continuous opening through which the tensioning rail 16 passes. The locking element 128 is rotationally fixed to the tensioning rail 16.

[0145] The locking element assembly 130 is supported by a spring device 132 (see Figure 19). The spring device is supported on a wall 134 and on the locking element assembly 130. The wall 134 faces the housing 48.

[0146] The locking element stack 130 has a locking position 136 (see, for example, Figure 19), in which the locking element stack 130 is tilted relative to the clamping rail 16. A force from the spring device 132 presses the locking element stack 130 into the locking position.

[0147] In the locking position 136, a displacement of the clamping rail 16 in a direction 138 opposite to the feed direction 90 (see, for example, Figure 19) is blocked. However, a displacement in the feed direction 90 is not blocked by the locking element assembly 130.

[0148] The locking element package 130 has an inclination in the locking direction at an angle 140 to a perpendicular to the longitudinal axis 22 of the tensioning rail 16 (see Figure 19), this inclination being opposite to the inclination of the feed element package 84 when it is tilted with the tensioning rail 16 in order to obtain a blocking for displaceability in the opposite direction 138 to the feed direction.

[0149] A release lever 142 is connected to the locking element assembly 130. An operator can grasp the release lever 142 and pivot it in a direction 144 that lies toward the second end 30 of the tensioning rail 16. In doing so, the operator must overcome the spring force of the spring device 132.

[0150] The locking element package 130 rests accordingly on an inner region of the housing 110 in order to enable this pivoting.

[0151] By pivoting the release lever 142 in direction 144, the angle of the locking element assembly 130 to the longitudinal axis 22 of the tensioning rail is changed. It is reduced, meaning the alignment becomes closer to an orthogonal alignment. This releases the displaceability of the tensioning rail 16 in the openings of the locking element assembly 130, thus enabling displacement.

[0152] The release lever 142 protrudes beyond the housing 110 on one side. The clamp 10 has an initial position (Figure 1) in which the release lever 142 is located on the same side as the actuating device 54. In particular, the release lever 142 is then arranged and configured such that, when an operator holds the clamp 10 by the actuating device 54, he or she can access the release lever 142 using one or more fingers of the holding hand.

[0153] It is fundamentally possible for the pivot bearing 118 to be designed in such a way that stepless rotation about the rotation axis 120 is possible.

[0154] A set rotational position is held in particular by force due to the spring force of the spring device 132.

[0155] In an alternative embodiment, a plurality of discrete rotational positions are provided. For this purpose, for example, the second sleeve 112 is provided with a locking ring 146 (see Figure 14); this has a plurality of elevations 148 that are spaced apart from one another.

[0156] A counter element 150 (Figure 14) for the locking ring 146 is provided on the housing 48. The counter element 150 is designed to engage in an area (a "valley") between adjacent elevations 148. A positive fit then secures a specific rotational position of the housing 48 relative to the second sleeve 112.

[0157] To move out of such a set rotational position, increased force is required. This increased force is necessary to move the counter element 150 out of the area between adjacent elevations 148.

[0158] In one embodiment, the counter element 150 is slidably mounted on the housing 48 and spring-supported. A spring force presses the counter element 150 against the locking ring 146 and, in a secured rotational position, into the area between adjacent elevations 148. To release this rotational position, i.e., to remove the counter element 150 from the area between adjacent elevations 148, the counter element 150 must be moved against the spring force, meaning the spring force must be overcome. This is performed by an operator, who must exert a corresponding amount of force during the rotation.

[0159] The clamp 10 according to the invention works as follows:

[0160] The fixed bracket 12, the counter bracket 14, and the locking device 20 are arranged in a rotationally fixed manner with respect to the tensioning rail 16. The housing 48 of the feed device 18 and the actuating device 54 are rotatable about the rotation axis 120 via the pivot bearing 118 relative to the tensioning rail 16 and thus also relative to the fixed bracket 12, the counter bracket 14, and the locking device 20.

[0161] As shown in Figures 1 to 11 (see in particular Figures 1 to 3), an operator can, depending on the application, move the actuating device 54 into the advantageous or desired rotational position relative to the fixed bracket 12 or counter bracket 14. With this rotation, the alignment of the brackets 12, 14 is maintained. The locking device 20 does not rotate.

[0162] In any rotational position of the actuating device 54, an operator can effect a feed via the feed device 18 of the clamping rail 16 in order to move the fixed bracket 12 towards the counter bracket 14 in the clamping function or to clamp one or more workpieces between the fixed bracket 12 and the counter bracket 14.

[0163] This is ensured by the ring-shaped engagement surface 108.

[0164] Without operator intervention on the release lever 142, the locking element package 130 is in the locking position 136 due to the force effect of the spring device 132. This means that the clamping rail 16 is prevented from moving in the opposite direction 138 to the feed direction 90.

[0165] When an operator actuates the actuating lever 68 (performs a pivoting movement), it acts on the feed element assembly 84, and the clamping rail 16 is then displaced in the feed direction 90 as described above. Counter-displacement is blocked by the locking element assembly 130 in the locking position 136.

[0166] By actuating the release lever 142 with pivoting in the direction 144, the locking on the locking device 20 can be released and a corresponding free displacement of the clamping rail 16 on the locking device 20 (and also of the feed device 18 if the actuating lever 68 is not actuated) is enabled.

[0167] In the solution according to the invention, the locking device 20 and the feed device 18 are decoupled from one another in the sense that even in the locking position 136 of the locking element package 130, a rotation of the actuating device 54 about the rotation axis 120 is possible and a feed actuation on the feed device 18 is possible.

[0168] In the described embodiment, the feed direction 90 is such that the fixed bracket 12 is movable towards the counter bracket 14 and one or more workpieces can be clamped between the fixed bracket 12 and the counter bracket 14.

[0169] The contact elements 38 and 44 face each other.

[0170] In one embodiment, it is possible to fix the fixed clamp 12 at the second fixation position 28. The fixation is achieved, in particular, such that the contact elements 38 and 44 are facing away from each other. In this case, a feed in the feed direction 90 of the clamping rail 16 causes the fixed clamp 12 and the counter clamp 14 to move apart. This realizes a spreading function. A spreading force can be applied to one or more workpieces.

[0171] During the clamping function of the clamp 10 (Figures 1 to 21), the locking device 20 is positioned on the clamping rail 16 between the fixed bracket 12 and the feed device 18. If the clamp 10 is modified so that the spreading function can be realized, the feed device 18 is positioned between the locking device 20 and the fixed bracket 12.

[0172] List of reference symbols

[0173] ferrule

[0174] Fixed bracket

[0175] Counter bracket

[0176] tensioning rail

[0177] Feed device

[0178] locking device

[0179] Longitudinal axis

[0180] First fixation position

[0181] First end

[0182] Second fixation position

[0183] Second ending

[0184] Holding area

[0185] opening

[0186] bracket element

[0187] Investment element

[0188] Holding area

[0189] bracket element

[0190] Investment element

[0191] Direction of displacement

[0192] Housing

[0193] Displacement guide

[0194] Plain bearing device

[0195] Actuating device

[0196] Floor

[0197] wall

[0198] Lid

[0199] Interior

[0200] Holding element

[0201] Rear area

[0202] Operating lever pivot bearing

[0203] Swivel axis

[0204] opening

[0205] First sleeve

[0206] First opening

[0207] Investment area

[0208] Feed element

[0209] Feed element package

[0210] opening

[0211] Nose

[0212] Feed direction

[0213] Starting position

[0214] Panning direction

[0215] Spring device

[0216] Feed element

[0217] wall

[0218] Upper part

[0219] Lower part

[0220] Angular position

[0221] Attack surface

[0222] Housing

[0223] Second sleeve

[0224] Page

[0225] Recording

[0226] Pivot bearing

[0227] axis of rotation

[0228] First pivot bearing

[0229] Second pivot bearing

[0230] Recording

[0231] Locking element

[0232] Locking element package

[0233] Spring device

[0234] Wall Locking position Opposite direction Angle Release lever Direction Locking ring Elevation Counter element

Claims

- 35 - Claims: Clamp comprising a clamping rail (16), a fixed bracket (12) which is mounted on the clamping rail (16), a counter bracket (14) relative to which the clamping rail (16) is displaceable, a feed device (18) on which the clamping rail (16) is displaceably mounted and to which the counter bracket (14) is connected in a displacement-resistant manner, an actuating device (54) which is arranged on the feed device (18) and by means of which a displacement of the clamping rail (16) in a feed direction (90) can be actuated, and a locking device (20) by which a displacement of the clamping rail (16) in a direction opposite (138) to the feed direction (90) can be locked, characterized in that the actuating device (54) is rotatable relative to the clamping rail (16) and is rotatable relative to the locking device (20), and that the locking device (20) is rotationally fixed relative to the clamping rail (16).Clamp according to claim 1, characterized in that the locking device (20) is connected to the feed device (18) in a displacement-resistant manner and the clamping rail (16) is slidably mounted relative to the locking device (20). Clamp according to claim 1 or 2, characterized in that the clamping rail (16) is slidably mounted on the locking device (20). - 36 - Clamp according to one of the preceding claims, characterized by at least one of the following: in a clamping function, the locking device (20) is positioned between the fixed jaw (12) and the feed device (18); in a spreading function, the feed device (18) is positioned between the locking device (20) and the fixed jaw (12). Clamp according to one of the preceding claims, characterized in that the counter jaw (14) is located on the locking device (20), in particular with at least one of the following: the counter jaw (14) is fixed against displacement on the locking device (20); the counter jaw (14) is fixed against rotation on the locking device (20). Clamp according to one of the preceding claims, characterized in that a region of the feed device (18), on which the actuating device (54) is arranged, is rotatably mounted on the clamping rail (16).Clamp according to claim 6, characterized in that a housing (48) of the feed device (18) is rotatably mounted on the clamping rail (16). Clamp according to any of the preceding claims, characterized in that the feed device (18) is rotatably mounted on the locking device (20) at least with a partial portion. A clamp according to any of the preceding claims, characterized in that an axis of rotation (120) of the actuating device (54) relative to the clamping rail (16) is parallel to the feed direction (90). A clamp according to any of the preceding claims, characterized in that a rotary bearing (118) for the rotation of the actuating device (54) relative to the clamping rail (16) is continuously variable or has a plurality of discrete steps and, in particular, detent steps. A clamp according to any of the preceding claims, characterized by at least one of the following: a housing (48) of the feed device (18) is rotatably mounted on the clamping rail (16) via a first rotary bearing (122) about a first axis of rotation (120); a housing (48) of the feed device (18) is rotatably mounted on the locking device (20) via a second rotary bearing (124) about a second axis of rotation (120). The first axis of rotation (120) and the second axis of rotation (120) are coaxial.Clamp according to claim 11, characterized in that the first rotary bearing (122) has a first sleeve (76) with a first opening (78), wherein the clamping rail (16) is guided through the first opening (78) and is mounted on the first sleeve (76) in a linearly displaceable and rotationally fixed manner, and that the first sleeve (76) is located on the housing (48). A clamp according to claim 12, characterized in that a counter element is associated with the first sleeve (76), which engages the first sleeve (76) to form discrete rotational positions, wherein (i) the first sleeve (76) has a detent ring, or (ii) the counter element has a detent ring. A clamp according to claim 12 or 13, characterized in that the first sleeve (76) is arranged at least partially in the housing (48). A clamp according to any one of claims 11 to 14, characterized in that the second rotary bearing (124) has a second sleeve (112) with a second opening, wherein the clamping rail (16) is guided through the second opening and is mounted on the second sleeve (112) so as to be linearly displaceable and rotationally fixed.Clamp according to claim 15, characterized in that a counter element (150) is associated with the second sleeve (112), which engages the second sleeve (112) to form discrete rotational positions, wherein (i) the second sleeve (112) has a detent ring (146), or (ii) the counter element has a detent ring. Clamp according to claim 15 or 16, characterized in that the second sleeve (112) (i) is arranged on the locking device (20) and is immersed in a housing (48) of the feed device (18), or (ii) is arranged on a housing of the feed device and is immersed in a recess of the locking device. Clamp according to one of the preceding claims, characterized in that the feed device (18) has at least one feed element (82, 98) on which the actuating device (54) acts, wherein the at least one feed element (82, 98) is rotationally fixed with respect to the clamping rail (16). - 39 - Clamp according to claim 18, characterized in that the at least one feed element (82, 98) has a contact surface (108) for the actuating device (54), which has an annular shape and in particular an annular shape. Clamp according to claim 19, characterized in that the contact surface (108) for the actuating device (54) surrounds the clamping rail (16) in an annular manner. Clamp according to any one of claims 18 to 20, characterized in that the at least one feed element (82, 98) has a through opening through which the clamping rail (16) is guided in a rotationally fixed manner. Clamp according to any one of claims 18 to 21, characterized in that the at least one feed element (82, 98) is positioned in a housing (48) of the feed device (18).Clamp according to one of claims 18 to 22, characterized in that a feed element package (84) is provided with a plurality of feed elements (82, 98), wherein in particular adjacent feed elements touch each other. - 40 - Clamp according to one of the preceding claims, characterized in that the actuating device (54) comprises an actuating lever (68) pivotable about a pivot axis (72), in particular with at least one of the following: the pivot axis (72) is oriented transversely and in particular perpendicular to the feed direction (90); the pivot axis (72) is oriented transversely and in particular perpendicular to a rotation axis (120) of the rotational mobility of the feed device (18) to the clamping rail (16). Clamp according to claim 24, characterized in that the actuating device (54) has a fixed retaining element (64) spaced apart from the actuating lever (68).Clamp according to claim 24 or 25, characterized in that the feed device (18) comprises at least one feed element (82, 98) to which the actuating lever (68) engages, wherein, starting from a starting position (92) of the at least one feed element (82, 98), when the actuating lever (68) engages, the at least one feed element (82, 98) is inclined towards the clamping rail (16) with canting of the at least one feed element (82, 98) on the clamping rail (16) and the clamping rail (16) is driven with linear displacement in the feed direction (90). Clamp according to claim 26, characterized by a spring device (96) which is supported on the at least one feed element (98), wherein a spring force of the spring device (96) tends to bring or hold the at least one feed element (98) in its initial position (92) to the clamping rail (16). - 41 - Clamp according to one of the preceding claims, characterized in that the locking device (20) has a release element (142) and in particular a release lever for releasing a lock. Clamp according to one of the preceding claims, characterized in that the locking device (20) has at least one locking element (128) and in particular a locking element assembly (130), wherein the at least one locking element (128) has a through opening through which the clamping rail (16) is guided, and wherein in a locking position (136) of the at least one locking element (128) the at least one locking element (128) is canted with the clamping rail (16). Clamp according to claim 29, characterized by a spring device (132) which is supported on the at least one locking element (128), wherein a spring force of the spring device (132) tends to bring or hold the at least one locking element (128) in its locking position (136).Clamp according to claim 29 or 30, characterized by a release element (142) which acts on the at least one locking element (128) and by means of which an angular position of the at least one locking element (128) to the clamping rail (16) can be adjusted. - 42 - Clamp according to one of the preceding claims, characterized by at least one of the following: the fixed jaw (12) is detachably mounted on the clamping rail (16); a clamping function is provided in which the feed direction (90) is a direction of the approach movement of the fixed jaw (12) to the counter jaw (14); a spreading function is provided in which the feed direction (90) is a direction of the retraction movement of the fixed jaw (12) from the counter jaw (14); the clamping rail (16) has a plurality of fixing positions (24; 28) for the fixed jaw (12) and, in particular, fixing positions (24; 28) are located in the region of opposite ends (26; 30) of the clamping rail (16).A clamp according to one of the preceding claims, characterized by a design as a one-handed clamp which can be held by one hand of an operator at the actuating device (54) and in which the clamping rail (16) can be advanced in the feed direction (90) via the actuating device (54) with the holding hand. A clamp according to claim 33, characterized in that a release element (142) of the locking device (20) is arranged and designed such that it can be operated by the holding hand of an operator who holds the clamp at the actuating device (54) in at least one unrotated position. * * *