Pliers

Abstract

The invention relates to pliers for moving a mandrel, comprising a first arm (1) and a second arm (2), wherein the first arm (1) has a first contact region (3) and the second arm (2) has a second contact region (5), and the first contact region (3) and the second contact region (5) at least partially touch one other in the closed state of the pliers, in which pliers the first contact region (3) has a first receiving groove (8) starting from the tip of the first contact region (3) and, in the closed state of the pliers, the first receiving groove (8) forms a mandrel cavity (10) which is partially delimited by the contact regions (3, 5) and is designed to receive a mandrel.

Description

[0001] Tongs

[0002] The invention relates to a pair of pliers for moving a mandrel, comprising a first arm and a second arm, wherein the first arm has a first contact area and the second arm has a second contact area and the first contact area and the second contact area at least partially touch each other when the pliers are in the closed state.

[0003] Radiators installed indoors to heat interior spaces are usually fitted with thermostatic radiator valves to control the flow through the radiator and thus set the desired temperature. These valves comprise a spring-loaded mandrel or actuating pin. If no pressure is exerted on the mandrel, a spring forces it outwards into a fully open position, opening the valve. Using the thermostatic head, the mandrel can be pushed inwards against the spring force, thereby fully or partially closing the valve, thereby regulating the flow through the radiator.

[0004] However, particularly after long periods of non-use (e.g. in summer), it can happen that the mandrel remains in the closed, pushed-in position even without pressure being applied. This means that the radiator no longer works (properly) because the flow can no longer be adjusted using the thermostat head. To repair it, it is often sufficient to pull the mandrel out of the closed position. Conventional pliers or a screwdriver are currently used to pull the mandrel out. However, this is cumbersome because the mandrel is relatively small and is usually located in the end of a pipe, making access to and grasping the mandrel with conventional tools difficult and making it more difficult to pull out.

[0005] It is therefore an object of the invention to provide a pair of pliers which makes it possible to grip and pull out the mandrel on heating valves in a simple manner.

[0006] According to the invention, a pair of pliers of the type mentioned at the outset is provided, in which the first contact region has a first receiving groove extending from the tip of the first contact region and the first receiving groove, in the closed state of the pliers, forms a mandrel cavity which is partially delimited by the contact regions and which is designed to receive a mandrel.

[0007] A pair of pliers is therefore provided which, in the closed state, has an elongated mandrel cavity that is defined by the two contact areas of the arms. Since the mandrel or the actuating pins of heating valves also have an elongated shape, the mandrels can be easily gripped in the mandrel cavity and then pulled out using these pliers. The mandrel cavity can have an essentially constant cross-section or, for example, widen or taper away from the tip, i.e. the mandrel opening. The pliers have two arms that can be pivoted relative to one another about a rotation axis. On the side opposite the rotation axis, the pliers have, for example, handles that serve to selectively close or open the pliers. In the closed state, the contact areas form the mandrel cavity to accommodate a mandrel, and in the open state the contact areas are spaced apart from one another.If a mandrel is gripped using the pliers according to the invention, the contact areas may not (fully) touch each other due to the size of the mandrel.

[0008] In a first embodiment, the longitudinal extension or longitudinal axis of the mandrel cavity is arranged perpendicular to the rotational axis of the pliers. The imaginary extension of the longitudinal extension of the mandrel cavity intersects the rotational axis. In an alternative embodiment, the longitudinal extension of the mandrel cavity runs essentially parallel to the rotational axis. In this case, the contact areas and the mandrel cavity are arranged (at least partially) on one side of the pliers.

[0009] The contact areas form the tip of the pliers. When closed, the tip can have a round, oval, (regularly) hexagonal or other shape when viewed from the front, with (approximately) half of the tip preferably being formed by a contact area. Furthermore, the contact areas can have a constant external cross-section in the direction of the longitudinal axis of the mandrel cavity. Alternatively, the cross-section of the contact areas tapers towards the mandrel opening of the mandrel cavity. The taper can, for example, be continuous, in particular essentially conical. The (maximum) external diameter of the contact areas in the area of ​​the mandrel cavity together in the closed state is, for example, 3 to 10 mm.This makes it possible for the pliers tip, i.e. the contact areas and the mandrel cavity arranged therein, to be easily inserted into small pipe diameters in order to be able to grip a mandrel accordingly even in these arrangements.

[0010] The pliers preferably have a spring element which is designed to press the pliers towards the open state. In order to close the pliers, a force must be exerted on the handles of the pliers against the spring force provided by the spring element. Alternatively, it is also possible to provide a spring element which is designed to press the pliers towards the closed state. In this case, a force must be exerted on the handles in order to open the pliers. The spring element makes it easier to use the pliers. However, no spring element can also be provided, so that the design of the pliers is simplified.

[0011] It is preferably provided that the second contact region has a second receiving groove starting from the tip of the second contact region, wherein the first receiving groove and the second receiving groove form the mandrel cavity when the pliers are closed. Both contact regions have receiving grooves. This improves the hold of the mandrel in the pliers because the shape of the mandrel cavity is better adapted to the mandrel. In particular, it is preferably provided that the first receiving groove and the second receiving groove are designed essentially symmetrically. One half of the mandrel cavity is preferably formed by the first receiving groove and the other half of the mandrel cavity by the second receiving groove.

[0012] Furthermore, it is preferably provided that the mandrel cavity has a single mandrel opening in the region of the pliers tip. The mandrel cavity has the shape of a blind hole. This arrangement facilitates production, particularly for pliers in which the longitudinal axis of the mandrel cavity is arranged perpendicular to the rotational axis of the pliers, since the groove(s) can be shorter.

[0013] To further improve the contact area of ​​the pliers on the usually round mandrel, it is preferably provided that the mandrel cavity has a substantially round cross-section. Alternatively, the cross-section can also be elliptical, triangular, quadrangular, in particular square, (regular) pentagonal, (regular) hexagonal, or have another shape. The receiving grooves are preferably arranged substantially symmetrically to one another.

[0014] In order to be able to adapt the mandrel cavity to different mandrel sizes, it is preferably provided that the first receiving groove has a first transverse groove and / or the second receiving groove has a second transverse groove. An insert element can be introduced into each of the transverse grooves, which partially reduces the size of the mandrel cavity. For this purpose, the insert element is, for example, designed in the shape of a semicircular segment and has, for example, a recess shaped like a semicircular segment, so that in the assembled state an insert opening is formed, in which the mandrel can be received. The insert element can be introduced into the transverse groove and fixed in place when the pliers are in the open state. For this purpose, the cross section of the transverse groove is preferably somewhat smaller than the cross section of a spring part of the insert element, so that a press fit is formed which holds the insert element firmly in the transverse groove.Preferably, two transverse grooves and correspondingly two insert elements are provided, which are particularly preferably designed to be substantially symmetrical.

[0015] Preferably, the first transverse groove and the second transverse groove are substantially opposite one another in the closed state. This makes it possible to arrange a reduction in the mandrel cavity formed in a common plane by means of symmetrically designed insert elements.

[0016] To ensure a firm and stable fit of the insert element(s) in the transverse groove(s), it is preferably provided that the longitudinal extent of the first transverse groove lies substantially in a plane arranged perpendicular to the longitudinal extent of the first receiving groove and / or the longitudinal extent of the second transverse groove lies substantially in a plane arranged perpendicular to the longitudinal extent of the second receiving groove. The at least one transverse groove therefore preferably runs in a plane that is substantially parallel to the plane in which the receiving opening of the mandrel cavity is arranged.

[0017] The first and / or the second transverse groove are preferably semicircular in shape, wherein the insert elements accordingly have substantially semicircular spring parts which are designed to be introduced into the transverse groove(s).

[0018] In a particularly preferred embodiment, the first arm comprises a first handle and the second arm comprises a second handle, wherein the first handle and the second handle at least partially delimit a substantially hexagonal receiving area when the pliers are closed. The hexagonal receiving area preferably has the shape of a regular hexagon and can be used to receive a hexagon screw so that the hexagon screw can be fixed and turned using the handles of the pliers. In this embodiment, the pliers not only have the function of moving the mandrel but also the function of rotating a hexagon screw. For example, heating valves are often fastened with hexagon screws, so that no special tool is required for this operation, but rather the same pliers as for pulling out the mandrel can be used.Preferably, the receiving area is completely enclosed in a ring shape by the handles when closed. In this embodiment, the handles touch each other when closed. Alternatively, the handles, at least those areas of the handles located on the side of the receiving area facing away from the rotation axis, do not touch each other when closed, but are spaced apart from each other. In this case, the receiving area is not completely enclosed by the handles of the pliers, but only partially.

[0019] Preferably, the handles comprise a metal, e.g., steel, at least on the inside, i.e., the side facing the other handle. This enables a better gripping of a hexagon screw using the correspondingly designed handles. Particularly preferably, the inside and outside, i.e., the side facing away from the other handle, are made of different materials. The outside of the handles consists, for example, of a softer material, e.g., rubber or plastic, while the inside consists of a harder material, e.g., metal. This allows the handles to be easily grasped and held, while also providing a good hold for a hexagon screw in the handles.

[0020] In a further preferred embodiment, the first arm comprises a first handle and the second arm comprises a second handle, wherein the first handle and / or the second handle has a receiving recess for receiving a twist lock. The receiving recess has, for example, a substantially square opening and is preferably designed to receive the closure of a vent valve so that it can be rotated. For this purpose, the edge region at least partially delimiting the receiving recess is preferably designed as a web, which further preferably has a round shape. During use, the web can be introduced into the pipe end in which the valve is arranged. The thickness of the web is preferably smaller than the diameter of the recess. The receiving recess makes it possible, for example.to be able to open a vent valve if necessary, whereby the same pliers can be used which are also provided for pulling out the mandrel. In a preferred embodiment, the longitudinal extent or the longitudinal axis of the receiving recess is arranged perpendicular to the axis of rotation of the pliers. The imaginary extension of the longitudinal extent of the receiving recess preferably intersects the axis of rotation. In an alternative embodiment, the longitudinal extent of the receiving recess runs essentially perpendicular to the axis of rotation, whereby the axis of rotation is spaced from the (imaginary extension) of the longitudinal extent of the receiving recess. Furthermore, the receiving recess can preferably be arranged in one side of the handle or in the end region of the handle. The receiving recess can, for example, be designed as a blind hole or as a through opening.The receiving recess preferably has a substantially constant cross-section partially or, particularly preferably, over the entire length.

[0021] Alternatively or additionally, it can be provided that the receiving recess is formed by two cutouts, each arranged in a handle of the pliers. In a closed position of the pliers, the cutouts together form the receiving recess. Preferably, the cutouts at least partially have a rectangular or triangular cross-section, which is further preferably designed such that in the closed state a receiving recess is formed which has a substantially square cross-section. The cutouts are preferably each delimited by a web, which preferably each has a semicircular outer wall. In the closed state, this provides a substantially circular web which delimits the receiving recess.

[0022] The outer diameter of the web or webs in the closed state of the forceps is preferably 1.4 times to 2.5 times, particularly preferably 1.7 times to 2.2 times, particularly preferably 1.8 times to 2.1 times as large as a side length of a square receiving recess.

[0023] The side length of the square receiving recess can be, for example, 5 mm and the outer diameter of the webs or the web in the closed state can be, for example, 9 mm.

[0024] Alternatively, the handles of the pliers can simply be designed as handles like those of conventional pliers.

[0025] Furthermore, the handles are preferably designed to be essentially symmetrical.

[0026] The pliers can be made of materials commonly used for pliers or other tools. The contact areas are preferably made of a metal, such as steel, to ensure proper securing of the mandrel and longevity of these areas.

[0027] The invention further relates to a set comprising pliers according to the invention, comprising a first transverse groove and / or a second transverse groove, and an insert element which is designed to be inserted into the first transverse groove and / or the second transverse groove. The set preferably comprises two insert elements which are particularly preferably designed to be substantially symmetrical. The insert element is designed such that, in the assembled state, it forms an insert opening in which the mandrel can be received. If two insert elements are provided, these interact to form or delimit an insert opening. It is preferably provided that at least two first insert elements are provided which together delimit a first insert opening. The insert opening can be delimited or enclosed completely or partially by the insert element(s).In order to be able to limit the mandrel cavity as required, it is preferably provided that a first insert element is provided with a first insert opening and a second insert element is provided with a second insert opening that is different from the first insert opening. The size or shape of the insert opening is therefore different between the first insert element and the second insert element. The insert opening(s) can be, for example, round, square or hexagonal. Particularly preferably, two first insert elements and two second insert elements are provided. The first insert opening is formed by the two first insert elements and the second insert opening is formed by the two second insert elements. Further additional insert elements or pairs of insert elements in other sizes or shapes can also be provided. The corresponding insert elements can, for example,be available in the form of spare parts in addition to the pliers, so that the appropriate insert elements can be selected and used as required.

[0028] Preferably, the at least one insert element comprises a spring part, wherein the cross-section of the transverse groove is smaller than the cross-section of the spring part, so that a press fit is formed in the connected state. This allows for easy fastening and detachment of the insert element.

[0029] Furthermore, it is preferably provided that the first transverse groove and / or the second transverse groove are semicircular in shape, wherein the spring parts of the insert elements accordingly have substantially semicircular spring parts which are designed to be introduced into the transverse groove(s).

[0030] The insert element(s) can be made of metal or plastic, for example.

[0031] The invention is explained in more detail below with reference to an exemplary embodiment shown schematically in the drawing. In this drawing: Fig. 1 shows a first embodiment of pliers according to the invention in a perspective view, Fig. 2 shows the pliers according to Fig. 1 in a side view, Fig. 3 shows the pliers according to Fig. 1 in a plan view, Figs. 4 to Fig. 17 show further embodiments of pliers according to the invention, Fig. 18 shows several tips of pliers according to the invention, Fig. 19 shows front views of pliers according to the invention, Fig. 20 shows an embodiment of a pliers tip, Fig. 21 shows a first insert element, Fig. 22 shows a second insert element, Figs. 23 to Fig. 25 show a further embodiment of pliers according to the invention and Figs. 26 to Fig. 29 show a further embodiment of pliers according to the invention.

[0032] Fig. 1 shows a pair of pliers according to the invention. The pliers comprise a first arm 1 and a second arm 2. The first arm 1 has a first contact area 3 and a first handle 4, and the second arm 2 has a second contact area 5 and a second handle 6. The first arm 1 and the second arm 2 are essentially symmetrical. The first arm 1 and the second arm 2 can be pivoted relative to one another about an axis of rotation 7, so that the contact areas 3, 5 and the handles 4, 6 can be selectively moved closer to one another or away from one another. In the position shown, the pliers are closed, so that the contact areas 3, 5 touch one another. A first receiving groove 8 is formed in the first contact area 3, which, together with a second receiving groove 9 formed in the second contact area 5, forms a mandrel cavity 10 that is delimited by the contact areas 3, 5 and the receiving grooves 8, 9.The two receiving grooves 8, 9 each originate from the tip of the pliers, with the mandrel cavity 10 having a circular mandrel opening 11 in the area of ​​the pliers tip. The mandrel cavity 10 is designed to receive a mandrel and to fix it therein using the receiving grooves 8, 9 or the contact areas 3, 5. In this embodiment, the mandrel cavity 10 has only one mandrel opening 11 arranged at the pliers tip and is therefore designed as a blind hole. The longitudinal extent of the mandrel cavity 10 runs perpendicular and in the direction of the rotation axis 7, so that an imaginary extension of the longitudinal extent of the mandrel cavity 10 intersects the rotation axis 7.

[0033] The handles 4, 6 are each designed such that, in the closed state of the pliers shown, they define a hexagonal receiving area 12. The receiving area 12 is completely enclosed in a ring-shaped manner. During operation, the pliers can be used to grip and move a mandrel using the contact areas 3, 5 located near the tip of the pliers. Furthermore, the pliers can be used to grip, loosen, or tighten a hexagon screw or a hexagon nut, which are often used to secure a thermostatic head, using the handles 4, 6.

[0034] Fig. 2 shows a side view of the pliers according to Fig. 1. In particular, it is shown that the mandrel cavity 10, starting from the mandrel opening 11, has a conical shape that tapers toward the axis 7 or the handles 4, 6.

[0035] Fig. 3 shows a top view of the pliers according to Fig. 1. It is shown that the pliers have a substantially constant thickness, except for the tip.

[0036] In Fig. 4, Fig. 4a shows a side view and Fig. 4b a top view of a second embodiment of the pliers according to the invention. In contrast to the embodiment according to Figs. 1 to 3, the axis of the mandrel cavity 10 runs essentially parallel to the axis 7. The mandrel opening 11 is arranged on one side of the pliers. Furthermore, the tongue tip formed by the contact areas 3, 5 is essentially oval.

[0037] In Fig. 5, Fig. 5a shows a side view and Fig. 5b a top view of a third embodiment of the pliers according to the invention. Unlike the embodiment according to Fig. 4, the receiving area 12 is not completely enclosed, but only partially, since the handles 4, 6 do not touch each other in the closed state.

[0038] In Fig. 6, Fig. 6a shows a side view and Fig. 6b a top view of a fourth embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 4, the tip of the tongue is essentially circular.

[0039] In Fig. 7, Fig. 7a shows a side view and Fig. 7b a top view of a fifth embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 6, the receiving area 12 (similar to the embodiment according to Fig. 5) is not completely enclosed, but only partially, since the handles 4, 6 do not touch each other in the closed state.

[0040] In Fig. 8, Fig. 8a shows a side view and Fig. 8b a top view of a sixth embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 4, both the tongue tip and the mandrel cavity 10 are essentially regularly hexagonal.

[0041] In Fig. 9, Fig. 9a shows a side view and Fig. 9b a top view of a seventh embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 8, the receiving area 12 (similar to the embodiment according to Fig. 5) is not completely enclosed, but only partially, since the handles 4, 6 do not touch each other in the closed state.

[0042] In Fig. 10, Fig. 10a shows a side view and Fig. 10b a plan view of an eighth embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 6, the mandrel cavity 10 does not have a round, but a square cross-section. The grooves 8, 9 are each triangular. In Fig. 11, Fig. 11a shows a side view and Fig. 11b a plan view of a ninth embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 10, the receiving area 12 (similar to the embodiment according to Fig. 5) is not completely enclosed, but only partially, since the handles 4, 6 do not touch one another in the closed state.

[0043] In Fig. 12, Fig. 12a shows a side view and Fig. 12b a top view of a tenth embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 6, the handles 4, 6 are designed as conventional gripping elements and do not define a hexagonal receiving area.

[0044] In Fig. 13, Fig. 13a shows a side view and Fig. 13b a top view of an eleventh embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 4, the handles 4, 6 are designed as conventional gripping elements and do not define a hexagonal receiving area.

[0045] In Fig. 14, Fig. 14a shows a side view and Fig. 14b a top view of a twelfth embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 1, the handles 4, 6 are designed as conventional gripping elements and do not define a hexagonal receiving area.

[0046] In Fig. 15, Fig. 15a shows a side view and Fig. 15b a top view of a thirteenth embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 8, the handles 4, 6 are designed as conventional gripping elements and do not define a hexagonal receiving area.

[0047] In Fig. 16, Fig. 16a shows a side view and Fig. 16b a top view of a fourteenth embodiment of the pliers according to the invention. In contrast to the embodiment according to Fig. 10, the handles 4, 6 are designed as conventional gripping elements and do not define a hexagonal receiving area.

[0048] In Fig. 17, Fig. 17a shows a side view and Fig. 17b a top view of a fifteenth embodiment of the pliers according to the invention. Unlike the embodiment according to Fig. 1, the receiving area 12 is not completely enclosed, but only partially, since the handles 4, 6 do not touch each other in the closed state.

[0049] In Fig. 18, various pliers tips are shown in detail. Fig. 18a shows a tip that tapers towards the front and has a round cross-section, wherein the mandrel cavity 10 also has a substantially round cross-section. Fig. 18b shows a tip that tapers towards the front and has an oval cross-section, wherein the mandrel cavity 10 also has a substantially oval cross-section. Fig. 18c shows a tip that tapers towards the front and has a regular hexagonal cross-section, wherein the mandrel cavity 10 also has a substantially regular hexagonal cross-section. Fig. 18d shows a tip that tapers towards the front and has a round cross-section, wherein the mandrel cavity 10 has a substantially square cross-section. Fig. 18e shows a tip with a constant round cross-section, wherein the mandrel cavity 10 has a substantially round cross-section.Figure 18f shows a tip with a constant oval cross-section, wherein the mandrel cavity 10 has a substantially oval cross-section. Figure 18g shows a tip with a constant regular hexagonal cross-section, wherein the mandrel cavity 10 has a substantially regular hexagonal cross-section. Figure 18h shows a tip with a constant round cross-section, wherein the mandrel cavity 10 has a substantially square cross-section.

[0050] Fig. 19 shows a front view of several pliers according to the invention. The longitudinal extension of the mandrel cavities 10 runs in the direction of axis 7.

[0051] In Fig. 19a a round tip with a square mandrel cavity 10 is shown, in Fig. 19b an oval tip with an oval mandrel cavity 10 is shown, in Fig. 19c a round tip with a round mandrel cavity 10 is shown and in Fig. 19d a regularly hexagonal tip with a regularly hexagonal mandrel cavity 10 is shown.

[0052] Fig. 20 shows a pliers tip of a pair of pliers according to the invention; in Fig. 20a in the closed state and in Fig. 20b in the open state. Here, the first contact area 3 has a first transverse groove 13 and the second contact area 5 a second transverse groove 14. The transverse grooves 13, 14 are designed symmetrically to one another and each run transversely to the corresponding receiving groove 8, 9. The transverse grooves 13, 14 are designed to each receive and hold an insert element 15, 16 (Fig. 21). In Fig. 21, two first insert elements 15, 16 are shown in the closed state in Fig. 21a and in the open state in Fig. 21b. The first insert elements 15, 16 are each designed in the shape of a semicircle segment and each have a spring part 17, 18. The spring parts 17, 18 are inserted into the transverse grooves 13, 14 in the assembled state.The first insert elements 15, 16 each have a semicircular segment-shaped recess, which together form a closed first insert opening 19 that is smaller than the mandrel opening 11 formed by the receiving grooves 8, 9. In the closed state and connected to the transverse grooves, the mandrel cavity 10 is thereby reduced in size in the region of the first insert opening 19 and can thus be adapted to smaller mandrels.

[0053] In Fig. 21, in Fig. 21a, two second insert elements

[0054] 20, 21 in the closed state and in Fig. 21b in the open state. The second insert elements 20, 21, like the first insert elements 15, 16 (Fig. 21), are each constructed in the shape of a semicircle segment and each have a spring part 17, 18. The second insert elements 20, 21 each have a semicircle segment-shaped recess, which together form a closed second insert opening 22 that is smaller than the first insert opening 19.

[0055] Several insert elements 15, 16, 20, 21 can be provided, each having, for example, different insert openings 19, 22. The insert openings 19, 22 can differ in both size and shape. This allows the appropriate insert elements to be selected as required.

[0056] 15, 16, 20, 21 to select and use. Fig. 23 shows a further embodiment of pliers according to the invention in an open state. In addition to the embodiment according to Fig. 1, the pliers have a receiving recess 23 (Fig. 25), which in the closed state is formed by cooperating cutouts 24. The cutouts 24 are each arranged in an end region of a handle 4, 6 and have a substantially rectangular cross-section, so that the receiving recess 23 has a substantially square cross-section. The cutouts 24 are each at least partially delimited by webs 25, which are substantially semicircular. The imaginary extension of the longitudinal extent of the receiving recess 23 intersects the axis of rotation 7.

[0057] In Fig. 24, the pliers according to Fig. 23 are shown in a closed position in a side view.

[0058] In Fig. 25a, the pliers according to Fig. 23 are shown in a view from the rear, showing the square shape of the receiving recess 23 and the round shape of the webs 25.

[0059] Fig. 25b shows a detail of the illustration in Fig. 25a. The side lengths 26 of the receiving recess 23 are essentially the same and are, for example, 5 mm each. The outer dimension 27 of the webs 25 is, for example, 9 mm.

[0060] Fig. 26 shows a further embodiment of pliers according to the invention in a perspective view from above in an open state. The pliers have a receiving recess 23 which, in contrast to the embodiment according to Fig. 23, is only formed in a handle 4, so that the receiving recess 23 can also be used when the pliers are open. The receiving recess 23 is completely delimited by a circular web 28. The web 28 has a substantially circular shape on the outside. In this embodiment, the longitudinal extent of the receiving recess 23 runs substantially perpendicular to the axis of rotation 7, wherein the axis of rotation 7 is spaced from the (imaginary extension) of the longitudinal extent of the receiving recess 23.

[0061] Fig. 27 shows the pliers according to Fig. 26 in a perspective view from below. In particular, it is shown that the receiving recess 23 is designed as a through opening.

[0062] In Fig. 28, the pliers according to Fig. 26 are shown in a closed position in a side view.

[0063] Fig. 29 shows a top view of the pliers according to Fig. 26. The side lengths 26 of the receiving recess 23 are essentially the same and are, for example, 5 mm each. The outer dimension 27 of the web 28 is, for example, 9 mm.

Claims

Patent claims:

1. Pliers for moving a mandrel, comprising a first arm (1) and a second arm (2), wherein the first arm (1) has a first contact area (3) and the second arm (2) has a second contact area (5), and the first contact area (3) and the second contact area (5) at least partially touch one another when the pliers are in the closed state, characterized in that the first contact area (3) has a first receiving groove (8) extending from the tip of the first contact area (3), and the first receiving groove (8) forms a mandrel cavity (10) partially delimited by the contact areas (3, 5) when the pliers are in the closed state, which mandrel cavity is designed to receive a mandrel.

2. Pliers according to claim 1, characterized in that the second contact area (5) has a second receiving groove (9) extending from the tip of the second contact area (5), wherein the first receiving groove (8) and the second receiving groove (9) form the mandrel cavity (10) in the closed state of the pliers.

3. Pliers according to claim 1 or 2, characterized in that the mandrel cavity (10) has a single mandrel opening (11) in the region of the pliers tip.

4. Pliers according to claim 1, 2 or 3, characterized in that the mandrel cavity (10) has a substantially round cross-section.

5. Pliers according to one of claims 1 to 4, characterized in that the first receiving groove (8) has a first transverse groove (13) and / or the second receiving groove (9) has a second transverse groove (14).

6. Pliers according to claim 5, characterized in that the first transverse groove (13) and the second transverse groove (14) are substantially opposite one another in the closed state.

7. Pliers according to one of claims 5 or 6, characterized in that the longitudinal extent of the first transverse groove (13) lies substantially in a plane arranged perpendicular to the longitudinal extent of the first receiving groove (8) and / or the longitudinal extent of the second transverse groove (14) lies substantially in a plane arranged perpendicular to the longitudinal extent of the second receiving groove (9).

8. Pliers according to one of claims 1 to 7, characterized in that the first arm (1) comprises a first handle (4) and the second arm (2) comprises a second handle (6), wherein the first handle (4) and the second handle (6) at least partially delimit a substantially hexagonal receiving area (12) in the closed state of the pliers.

9. Pliers according to one of claims 1 to 8, characterized in that the first arm (1) comprises a first handle (4) and the second arm (2) comprises a second handle (6), wherein the first handle (4) and / or the second handle (6) has a receiving recess (23) for receiving a twist lock.

10. Set comprising a pair of pliers according to one of claims 5 to 9 and an insert element (15, 16, 20, 21) which is designed to be inserted into the first transverse groove (13) and / or the second transverse groove (14).

11. Set according to claim 10, characterized in that a first insert element (15, 16) with a first provided insert opening (19) and a second insert element (20, 21) with a second provided insert opening (22) which is different from the first insert opening (19) are provided.

12. Set according to claim 10 or 11, characterized in that at least two first insert elements (15, 16) are provided, which together delimit a first insert opening (19).

13. Set according to claim 10, 11 or 12, characterized in that the at least one insert element (15, 16, 20, 21) has a spring part (17, 18), wherein the cross section of the transverse groove (13, 14) is smaller than the cross section of the spring part (17, 18), so that in the connected state a press fit is formed.

14. Set according to claim 13, characterized in that the first transverse groove (13) and / or the second transverse groove (14) are semicircular, wherein the spring parts (17, 18) of the insert elements (15, 16, 20, 21) have correspondingly substantially semicircular spring parts which are designed to be introduced into the transverse groove(s) (13, 14).

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