EP1559513A2 - Pressing tool with swivelling pressing loop - Google Patents

Abstract

The pressing tool has a pressing fork head (1) with two opposite turning pressing jaws (2), having at least one tilting hinge (3) to create a tilting angle (4) between the jaws of 120[deg]-30[deg]. The tilting hinge includes at least one locking element enabling a preset tilting angle to be fixed. The locking element has at least one spring element and one moving bolt.

Description

The invention relates to a pressing tongs head or a pressing tool with two opposite, pivotally arranged pressing jaws, for example by means of a drive unit a pivoting movement transverse to a Execute the axis of the pressing pliers head. Such pressing tongs heads or Press tools are used in particular for producing a pipe press connection with a press fitting element and a retractable or slidable therein Used pipe.

The earlier in the sanitary and heating field usual technique of a pipe connection by means of threaded pipes and / or by welding or soldering, has been named in recent years by a connection methodology "Compression technology" replaced. This compression technique becomes a pressfitting element with an insertable pipe in it by pressing insoluble connected with each other. This is a pressing tool, usually from two Pressing jaws consisting, set in the open position in the connection area and by activating a connectable with the pressing tool drive (for example electrically or hydraulically) the pipe press connection by closing made of the pressing tool. The compression technology is particularly suitable for Conduits with a diameter of 10 mm to 100 mm.

Due to this wide application, different pressing tools may be necessary or different drives required. This is among other things justified that realized different pivoting ranges of the pressing jaws Need to become. It should also be noted that the closing of the Pressing force required with the dimension of the connected Conduit rises proportionally. Therefore, newer drives had to be developed be in which, if necessary, several strokes to open and close the Pressing jaws are required. In some cases, press forces of up to 13 tons are used realized. In addition, for a fluid-tight connection a possible uniform application of force over the circumference of the conduit, so that depending on the pipes to be connected different configurations be used by pressing jaws.

Especially in the domestic sanitary and heating sector, the pipe systems are under Relocated very cramped space. Now is a repair required, so the pipelines are difficult to reach. In the known pressing tools and the required drives, however, there is considerable space requirement, the a direct accessibility to the connecting portion of the piping system requires. This puts many craftsmen facing the problem of having larger line sections need to be replaced, or even the conventional connection techniques must be used again.

On this basis, it is an object of the present invention, the known To solve problems related to conventional pressing tools and Specifically, specify a pressing tongs head or a pressing tool, the or which can also be used in confined spaces. It should simultaneously ensure safe operation of the pressing tool. The pressing tool or the pressing tongs head should be simple and mechanically stable.

These objects are achieved with a device according to the features of Patent claim 1 or a device with the features of the claim 2. Further advantageous embodiments are dependent in each case Claims formulated. It should be noted that the in the claims listed features in any technically meaningful way can be combined with each other and further advantageous embodiments show the invention. For a more detailed characterization of the invention also contents of the description are used.

The device according to the invention has a press pliers head which has two opposite, includes pivotally arranged pressing jaws, wherein with the pressing jaws at least one tilting joint for generating a tilt angle is provided.

The pressing tongs head is usually a separately available component of a Pressing tool, which optionally has different diameters. With Nominal diameter is a measure of the opening formed by the press jaws for receiving meant by the conduit, so this measure also serves as an indication which line diameter can be machined with such a pressing tongs head are. A pressing tongs head usually has nominal width ranges of 10 mm up to 20 mm (ie it can be used, for example, for pipes of 50-75 mm diameter) to generate a uniform, radially inward force. Furthermore At the same time the Verschwenkweg the pressing jaws is kept small, so that simpler drive units can be used. Such a limitation allow the pivoting movement of the pressing jaws

Usually, the pressing jaws are in the closed state substantially parallel to each other and to each other. They each have a pivot, around which they are pivotable. The pressing jaws themselves are on the one hand with the processing pipe and on the other hand contacted with force introduction means. In order to In particular, it is meant that this tool without a press sling or the like additional components, which produced by the pressing jaws Take up pivoting movement and even on the pipe section to be machined act. To accommodate the pipe section the pressing jaws are therefore provided with a corresponding recess, both recesses together form the opening or receptacle for a pipe. The diameter of the In turn, opening corresponds approximately to the diameters to be machined Conduits, so that as symmetrical, radially inwardly acting Force acts on the pipe section.

While known pressing tongs heads substantially radially or perpendicular to Pipeline had to be aligned now exists through the providence of the at least one tilting joint the possibility of the pressing tongs head in one deviate from this angle. The tilting joint is designed so that it can transmit the occurring forces. The tilt joint usually has a neutral position, wherein the pressing tongs head substantially the shape corresponds to conventional pressing tongs heads. Starting from this neutral position is it possible to use sections of the pressing tongs head or pressing jaws of ' deflect this neutral position in one and / or other direction. It will implemented a tilting range, which can be easily described with the tilt angle. In this connection it should be noted that preferably each pressing jaw is a separate one Tilting joint, wherein the tilting movement of the pressing jaws then can also be executed coupled. It is also possible that the pressing jaws and / or the pressing tongs head still at least one other tilting joint and / or having an (unchangeable) bend to a larger tilt angle to achieve.

For a variety of applications, it will be sufficient if the tilting joint starting from the neutral position, a tilt angle in one direction, up to 90 °, for example. However, it can work in special applications as well It may be necessary for the toggle joint to move from neutral to both Directions is tiltable with a tilt angle, so that, for example, a Total tilt angle of about 180 ° can be realized. Is the tilting joint in one deflected position, are parts of the pressing tongs head in one non-vertical position to the pipe section or not in alignment with the opening the pressing jaws for receiving the pipe section. Rather, lie this, for example, at a 90 ° tilt parallel to the pipe section. This ensures that the pressing tongs head or the pressing tool very close to the pipe section to be connected along is realized and even under confined space a press connection can be.

According to a further aspect of the invention, a device with a Pressing tool proposed which a pressing tongs head with two opposite, includes pivotally arranged pressing jaws, and a drive unit for effecting the pivoting movement transverse to an axis, wherein with the pressing jaws at least one tilting joint for generating a Tilting angle is provided. Under a drive unit is in particular a to understand those which by means of an electric or hydraulic drive unit the force required to pivot the press jaws applies. In this case, a force is usually generated along the axis, which then is converted to the pivoting movement. At least one tilting joint is now formed with the pressing jaws, preferably each pressing jaw with at least a separate tilting joint is executed. More tilting joints can e.g. be provided on the pressing tongs head. Regarding other skills or Variants of the tilting joint is on the corresponding facts the tilting joint of the pressing tongs head referenced.

According to a further embodiment of the invention, the tilting joint forms a Tilt angle in the range of 120 ° to 30 °. Especially in the case of a one-sided Kinking of parts of the pressing tool or the pressing tongs head is only desired, a tilt angle of 90 ° is sufficient. The single ones Tilt angles can be adjusted continuously, but it is also possible that only certain tilt angles, for example, at equal intervals of 30 °, are adjustable.

According to an advantageous development, the tilting joint comprises at least one Locking element for fixing at least one predetermined tilt angle. Just in the event that no stepless adjustment of the tilt angle is given, is it makes sense, an exact positioning of the mutually tilted portions to ensure the pressing tool or the pressing tongs head. You can do this Adjustment or adjustment aids may be provided, such as by means of at least a locking element. The locking element engages with corresponding recesses of the pressing tool when a certain tilt angle is reached has been. In general, the locking element can be an element of the tiltable part or be the fixed part of the pressing tool, wherein in the other Part a corresponding snap-in is provided. The locking element provides Also, make sure that this tilt angle when machining the pipe section not changed.

It is particularly advantageous that the at least one locking element at least a spring element and a movable bolt has, so that the bolt with the spring element is deflected towards a depression of the tilting joint. To this Way, a kind of latching closure is formed, which the tilting joint in a certain Position or locked with a certain tilt angle. With the Term "bolts" are a variety of different form elements that includes are suitable for performing such a latching function, for example Balls, projections, detents, etc .. This bolt is movably arranged, the is in particular displaceable relative to subregions of the tilting joint. Is the desired position of the tilting joint or reaches the predetermined tilt angle, The bolt is pressed with the spring element in a sink and forms there a positive connection or adhesion. This ensures that another Tilting without additional measures is prevented. The valley is preferred in the essentially a contour adapted to the bolt.

According to a further embodiment of the device, each pressing jaw has one Tilting joint, with a synchronization mechanism to ensure the same tilt angle is provided. The providence of the tilting joints directly in the Press tongs head has the advantage that these pressing tongs heads on conventional Press tools can be placed or combined with these. In order to is proposed in a simple manner, a spare part, which is the conventional Compressed tools added. To ensure that the tilting joints in the press jaws each have the same Kippwinkelstellung are appropriate Provide funds. A synchronization mechanism may be, for example be realized by a connection of both tilting joints' or the two pressing jaws is provided, so that an independent operation only one of the two tilting joints in the pressing jaw is not possible. So, for example on a pressing jaw a flap, a guide pin or the like Be provided component that acts as a kind of driver, so the movable or tilting part of the other pressing jaw forces its own tilting movement to follow. Make sure that this driver is also in the open or swung-out state of the pressing jaws still represents a guide. Of course it is also possible to use such carriers in other places of the Provide pressing tongs head, this then preferably with two pressing jaws in contact. As a result, even in such embodiments of the pressing jaws ensure that they each act on the same pipe cross-section and a liquid and possibly gas-tight press connection is generated.

In addition, it is also proposed that the pressing tool a wiederlösbaren Connection mechanism for the pressing tongs head has. This makes it possible that each suitable for the application pressing tongs heads with the pressing tool can be connected, so for example, the corresponding Nominal size. As a detachable connection, in particular screw or snap connections. Other locking systems are under circumstances used.

According to a development of the pressing tool, this has a drive unit with a reciprocating piston, which causes the pivoting movement of the pressing jaws. The reciprocating piston can be operated hydraulically or electrically. The linear movement of the reciprocating piston is by suitable means in the pivoting movement transferred the pressing jaws. The power transmission or the transmission The pivoting movement takes place via the tilting joint.

Fig. 1,2

schematisch in einer Draufsicht und in einer Seitenansicht eine Ausführungsvariante des erfindungsgemäßen Presswerkzeuges,

Fig. 3,4,5

schematisch und in einer Draufsicht sowie einer Seitenansicht eine Ausführungsvariante eines Presszangenkopfes,

Fig. 6

schematisch eine weitere Ausführungsvariante des Presszangenkopfes mit einem Synchronisationsmechanismus, und

Fig.7

schematisch ein Anwendungsbeispiel für eine Presszange mit einem Kippgelenk in den Pressbacken.

The invention and the technical environment will be explained in more detail with reference to the figures. In the figures, particularly preferred embodiments of the invention are shown, but the invention is not limited thereto. Show it:

Fig. 1.2

schematically in a plan view and in a side view of an embodiment of the pressing tool according to the invention,

Fig. 3,4,5

schematically and in a plan view and a side view of an embodiment of a pressing tongs head,

Fig. 6

schematically a further embodiment of the pressing tongs head with a synchronization mechanism, and

Figure 7

schematically an example of application for a pressing tongs with a tilting joint in the pressing jaws.

Fig. 1 and 2 show schematically and in two views a pressing tool 5, which can be used for connecting pipes. In Fig. 1 (top view) is the tilting joint 3 and the tilt angle 4 can be clearly seen with it. The tilting joint 3 is part of the pressing tongs head 1, which has a Connecting mechanism 13 with an adapter 15 and further via a pickup 16 connected to the piston 14 designed as a drive unit. The adapter 15 allows the inclusion of different embodiments of Pressing tongs head 1, for example, depending on the used Drive unit 6 or the resulting power transmission to the Press pliers head 1. From Fig. 1 is very easy to see that the pressing tool 5 extends substantially along an axis 7. Should now be connected Pipe section between the press jaws 2 of the pressing pliers head 1 is arranged So far, had this axis 7 substantially perpendicular to Pipe axis to be aligned. The tilting joint 3 now offers the possibility a deviating orientation of the pressing tool 5 for (not to allow shown) line section. From Fig. 2 (side view) is to recognize that the pressing tool 5 a handle 18 with a shift lever 17th for activating the drive unit 6. Accordingly, the pressing tool 5 to operate with one hand. The drive unit 6 is provided with a reciprocating piston 14 executed, which generates a force in the direction of the axis 7. This is about the Pickup 16 and the adapter 15 on the pressing jaws 2 of the pressing tongs head 1, so that this indicated by black arrows pivoting movement for opening and closing the oppositely arranged pressing jaws 2 allows. The so-designed pressing tool 5 is very handy and flexible used.

FIGS. 3 and 4 likewise show a variant embodiment in two different views of the pressing tongs head 1. The pressing tongs head 1 extends again substantially in a plane characterized by the axis 7 can be. While in Figs. 1 and 2, a neutral position of the tilting joint is shown in Fig. 3 is an angled 90 ° position of the pressing jaws 2 shown. With the help of the tilting joint 3 is thus the tilt angle 4 of 90 ° (Degree) realized. Consequently, the pressing tongs head 1 is now substantially parallel to align the pipe section (not shown) to be connected. The Side view (Fig. 4) illustrates the embodiment of the tilting joint 3. In this case, each pressing jaw 2 has a kind of hinge joint, wherein the two Kippgelenke 3 despite each separate shafts 20 only synchronously operated with each other are, since the outside driver 21 are provided, which is a smooth, uniform and ensure synchronous tilting of the pressing jaws 2. This synchronization mechanism 12 is thus formed with drivers 21, on both Sides of a press pack 2 are provided. It is also possible that the tilt angle is preset via a respective adjusting wheel 19, so that the Shafts 20 of the tilting joints 3 a matching orientation or orientation exhibit.

In Fig. 5, the embodiment of a locking element 8 is illustrated as a detail. For this purpose, the shaft 20, which is not only movable along its extension axis is stored, but also also can rotate, running with a bolt 10, the at certain angular positions by means of a spring element 9 in the Sink 11 of the tilting joint 3 is locked. To solve this lock is the Shaft 20 against the force of the spring element 9 by means of the adjusting wheel 19 upwards to move and twist. Such depressions 11 and spring elements 9 can be provided in different angular positions.

In Fig. 6 is a schematic representation of another embodiment of the pressing tongs head 1 is shown with a synchronization mechanism 12, with on both sides a pressing jaw 2 drivers 21 is realized. The drivers 21 (here only one is shown in the foreground) are each about a (one-sided) attachment 22 attached to a pressing jaw 2. Since the drivers 21 to in the Range of the other cheek plate 2 extend, they serve as a kind of leadership. Tilts the press jaw 21 shown below in its separate pivot joint 3, so At least one driver 21 comes into contact with the other pressing jaw 21 and so make sure that this is also tilted in the same way. So that can a substantially aligned alignment of the two pressing jaws 2 ensured become.

7 shows schematically an application example for a pressing tongs with a Tilting joint 3 in the pressing jaws 2. Shown is a wall 24, from which a tube 25 exits, wherein the tube 25 executed bent near the wall and then substantially is arranged parallel to a small distance 23. The well-known Crimping pliers are often designed to be relatively bulky, so that a vertical attachment of the pressing tool parallel to the wall 24 may be problematic. Here now offers the pressing pliers head 1 according to the invention a preferred application, because of the tilting joints 3 allows an oblique attachment of the pressing tool is, while ensuring that the pressing jaws 21 in one Angle 26 are aligned by 90 ° during the pressing process.

The pressing tool or the pressing tongs head described here allows a Connecting pipes, the tool being very flexible and even in confined spaces Space is easy to use.

LIST OF REFERENCE NUMBERS

1

Press pliers head

2

pressing jaw

3

tilting joint

4

tilt angle

5

press tool

6

drive unit

7

axis

8th

locking element

9

spring element

10

bolt

11

depression

12

synchronization mechanism

13

joint mechanism

14

reciprocating

15

adapter

16

pickup

17

gear lever

18

handle

19

thumbwheel

20

wave

21

takeaway

22

attachment

23

distance

24

wall

25

pipe

26

angle

Claims (8)

Device comprising a pressing tongs head (1), comprising two opposite, pivotally arranged pressing jaws (2), characterized in that with the pressing jaws (2) at least one tilting joint (3) for generating a tilting angle (4) is provided. Device comprising a pressing tool (5), comprising a pressing tongs head (1) with two opposite, pivotally arranged pressing jaws (2), and a drive unit (6) for effecting the pivoting movement transversely to an axis (7), characterized in that Pressing jaws (2) at least one tilting joint (3) for generating a 'tilt angle (4) is provided. Device according to claim 1 or 2, characterized in that the tilting joint (3) forms a tilt angle (4) in the range of 120 ° to 30 °. Device according to one of the preceding claims, characterized in that the tilting joint (3) comprises at least one latching element (8) for fixing at least one predetermined tilt angle (4). Device according to claim 4, characterized in that the at least one latching element (8) has at least one spring element (9) and a movable bolt (10), so that the bolt (10) with the spring element (9) towards a sink (11 ) of the tilted steering (3) is deflectable. Device according to one of the preceding claims, characterized in that each pressing jaw (2) has a tilting joint (3), wherein a synchronization mechanism (12) for ensuring the same tilt angle (4) is provided. Device according to one of the claims 2 to 6, characterized in that it has a releasable connection mechanism (13) for the pressing tongs head (1). Device according to one of the claims 2 to 7, characterized in that the drive unit (6) comprises a lifting piston (14), which causes the pivoting movement of the pressing jaws (2).

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