ES2911045T3 - Pincers - Google Patents

Abstract

Pincer with a mobile pincer arm (2), which configures a mobile jaw (6), and a fixed arm (3), which configures a fixed jaw (5), the fixed arm (3) being connected through a bolt connection (15) with the mobile pincer arm (2) with limited pivoting movement and the connection bolt (15) passing through an opening (10) in the fixed arm (3), the connection bolt (15) being able to move to along the opening (10) for the adjustment of a jaw width between the mobile jaw (6) and the fixed jaw (5), the connection bolt (15) being able to move in its longitudinal axis in relation to the pliers arm ( 2) mobile and with the fixed arm (3) between an end position that blocks a displacement movement of the fixed arm (3) with respect to the mobile pincer arm (2) and one that unlocks the displacement movement, the pin being configured connection (15) so that it can be locked in the final position that unlocks the displacement movement, characterizes This is because the connecting bolt (15) has a locking device (20), with which the connecting bolt (15) can be fixed in its axial mobility in relation to the fixed arm (3) to it and the locking device. lock (20) can move in the final position that unlocks the displacement movement, by means of a displacement movement of the mobile pincer arm (2) in relation to the fixed arm (3) between a toothing (11) arranged in the opening (10 ) and a toothing arranged on the connecting bolt (15).

Description

DESCRIPTION

Pincers

The invention relates to a pliers with a movable pliers arm, which forms a movable jaw, and a fixed arm, which forms a fixed jaw, the fixed arm being connected via a connecting bolt to the movable pliers arm with limited pivoting movement and the connecting bolt passing through an opening in the fixed arm, the connecting bolt being movable along the opening for adjustment of a jaw width between movable jaw and fixed jaw, the connecting bolt being movable in its longitudinal axis in relation to the movable pliers arm and to the fixed arm between an end position that blocks a displacement movement of the fixed arm with respect to the movable pliers arm and one that unlocks the displacement movement, the locking pin being configured connection so that it can be locked in the final position that unlocks the travel movement.

This type of pliers is known from the state of the art. Thus, for example, DE 39 29323 C2 discloses a pliers, which has proved suitable basically also during normal handling.

This previously known pliers has a movable jaw, which, through a joint with the movable pliers arm, can be pivoted relative to the fixed jaw about a connecting bolt. The connecting bolt is guided by a longitudinal hole, which has a toothing on opposite lateral surfaces in each case, which meshes with a toothing on the connecting bolt. Through the toothing, a relative arrangement of the movable jaw with respect to the fixed jaw is fixed for adjusting a jaw width between the movable jaw and the fixed jaw. In order to be able to move the movable jaw relative to the fixed jaw along the opening, the connecting bolt has a tooth-free zone next to a toothed area. The connecting bolt is accommodated in its longitudinal axis direction relative to the fixed jaw so that it can be moved between two end positions. In the first end position, the toothing of the connecting bolt engages in the toothing in the opening of the fixed jaw, so that a shifting movement of the fixed arm relative to the tongs arm or of the movable jaw relative to the jaw is blocked. fixed jaw. If the connecting bolt is now moved into its second end position, then the toothing of the connecting bolt disengages from the toothing in the opening. The connecting pin is then arranged with its tooth-free area in the opening and can be displaced in the direction of the longitudinal axis of the opening. This adjusts the width of the jaw, ie the distance between the moving jaw and the fixed jaw.

The connecting bolt is held in the first end position by a leaf spring, in which the toothing of the connecting bolt engages the toothing in the opening. The movement of the connecting bolt in its longitudinal axis direction thus occurs against the spring tension of the leaf spring.

In the case of this previously known state of the art it is disadvantageous that the connecting bolt has to be constantly pressed during displacement of the movable jaw relative to the fixed jaw, in order to thereby set a jaw width and to prevent the spring blade drives the connecting bolt back into the toothed position before the required jaw width is set. This is disadvantageous in particular when such a pliers is to be used in limited space conditions and in particular a corresponding jaw width has to be fitted there.

A pliers according to the order is known from DE 10 2005 035 019 A1. This previously known pliers has a slider on one surface of one arm, which has a receptacle for the connecting bolt. An inclined surface is attached to the housing, with which the connecting bolt during displacement of the slider in the axial direction of the opening receiving the connecting bolt moves from the locking position to the unlocking position. The slider is configured so that it can be locked in the position that unlocks the scrolling movement.

In view of this, the object of the invention is to improve a pliers according to order in such a way that the displacement of the movable jaw in relation to the fixed jaw and thus the adjustment of the jaw width are substantially facilitated.

As a solution to this objective, a pincer is provided according to claim 1. Accordingly, it is provided that the connection bolt after its transfer from the toothed to the non-toothed position, in which the unlocked displacement movement, can be locked, so that a return of the connecting bolt to the toothed position is clearly manipulable, where the locking of the connecting bolt in the unlocking end position of the traversing movement has to be actively suppressed and no longer occurs just because suppress a force that applies the connection bolt against a spring tension, for example, applied by means of the thumb. This facilitates handling of the pliers, particularly in the case of narrow space conditions in the area of use of the pliers, since, for example, the thumb does not have to remain constantly on the connecting bolt to hold it against the spring tension in the final position that unlocks the travel movement. The thumb can consequently be used for other purposes, e.g. to support the displacement of the movable jaw relative to the fixed jaw, thereby enlarging or reducing the width jaw.

Provision is made for the connecting bolt to have a locking device, with which the connecting bolt can be fixed in its axial mobility with respect to the arm attached to it.

An alternative configuration not according to the invention provides that the connecting bolt can be locked via a locking device arranged on the movable pliers arm.

The locking device can be adjusted in the final position that unlocks the displacement movement by means of a pivoting movement of the movable pliers arm in relation to the fixed arm, between the toothing arranged in the opening and the toothing arranged on the connecting bolt.

Accordingly, the movable pincer arm is pivoted relative to the fixed arm, after the connecting bolt has been brought into the final position which releases the displacement movement. By pivoting the movable pliers arm, the locking device arranged on the connecting bolt then comes into contact with the fixed arm, preferably in the area, which limits the lateral surfaces of the opening and surfaces oriented preferably at right angles with respect to to these, so that the connecting bolt is prevented from moving back to the final position that blocks the displacement movement, for example, by means of a leaf spring known from the state of the art.

Also in the case of the second embodiment not according to the invention, in which case the connecting bolt can be locked by means of a locking device arranged on the movable pincer arm, the locking is carried out by means of a pivoting movement of the movable pliers arm in relation to the fixed arm, in that, for example, the locking device arranged on the movable pliers arm engages in the connection pin and locks it in the final position that unlocks the displacement movement.

According to a refinement of the invention, provision is made for the opening to have a toothing arranged on at least one of its longitudinal sides and for the connecting bolt to have a toothing that overlaps with it, extending partially in the axial direction. length of the connecting bolt and that the combing toothing of the connecting bolt can be disengaged by displacement of the connecting bolt from the toothing in the opening. The locking device is preferably configured as a plate-shaped element, which is connected to the connecting bolt. This plate-shaped element can serve for contact with the fixed arm.

If the plate-shaped element is arranged in the movable clamp arm in the exemplary embodiment not according to the invention, then it is advantageous if it engages positively in a corresponding recess in the connecting bolt. In this sense, it can be, for example, a circumferential groove in the region of the non-toothed section of the connection bolt. The plate-shaped element is designed to be resistant to bending.

According to another feature of the invention, provision is made for the fixed arm to have a recess, in which the locking device can engage. The locking device can also be designed in the form of a pin, so that the corresponding recess is provided as a hole, in which the locking device engages in the case of pivoted movable pliers arm.

Finally, according to another characteristic of the invention, it is provided that the connecting pin cannot rotate with respect to the fixed arm and that the mobile arm is rotatably housed around the connecting pin or that the connecting pin is housed in a fixed manner. non-rotating with respect to the mobile arm and rotatably housed with respect to the fixed arm.

Other characteristics and advantages of the pliers according to the invention will emerge from the following description of the corresponding drawing. In the drawing they show:

Fig. 1: a pliers according to the invention with closed pliers jaw in a first perspective view;

Fig. 2: the pliers according to Fig. 1 with open pliers jaw in a second perspective view;

Fig. 3: the pliers according to Figs. 1 and 2 with open pliers jaw in a third perspective view;

Fig. 4: the pliers according to Figs. 1 to 3 with open pliers jaw in a fourth perspective view;

Fig. 5: the pliers according to Fig. 1 with open pliers jaw in a rear view; Fig. 6: The pliers according to Fig. 1 with open pliers jaw and pivoted pliers arm in a perspective view;

Fig. 7: the pliers according to Fig. 6 in a side view;

Fig. 7a: the pliers according to Fig. 7 in a sectional side view along section line A-A in Fig. 7;

Fig. 7b: the pliers according to Fig. 7 in another side view along section line BB in Fig. 7;

Figure 8: The pliers according to Figure 7 with closed pliers jaw and

Figure 8a: The pliers according to Figure 8 in a sectional view along section line A-A in Figure 8.

Figures 1 to 8 show a pliers 1, which has a movable pliers arm 2 and a fixed arm 3. The pliers arm 2 and the fixed arm 3 have at one end a gripping element 4, which consists in a coating of plastic material that covers the end consisting of metal of the pincer arm 2 or of the fixed arm 3.

The fixed arm 3 has a fixed jaw 5 at its end opposite the gripping element 4. In addition, a movable jaw 6 is provided, which is displaceable in relation to the fixed jaw 5 along a section 7 of the fixed arm 3. The jaw 6 has a recess 8 at its end facing the pliers arm 2, in which a pin 9 of the pliers arm 2 hooks.

In the section 7 of the fixed arm 3, an opening 10 is configured as an elongated hole, which each has a toothing 11 on the two parallel running side surfaces.

The jaw 6 is shaped at its end facing the tongs arm 2 in U-shaped cross-section for a partial area and extends with a groove of this type of configuration, the section 7 of the fixed arm 3. The jaw 6 is arranged in a movable manner in parallel with respect to the longitudinal extension of the opening 10 by the fixed arm 3, specifically in section 7.

The pliers arm 2 is U-shaped in cross section at its end facing the fixed arm 3 and has a recess 12 which extends beyond the section 7 of the fixed arm 3. The pliers arm 2 thus has two ribs 13 running parallel to one another, which are arranged at a distance from one another to form the recess 12. On the end side, each rib 13 has a hole 14, in which a connecting bolt 15 is arranged such that the pliers arm 2 can pivot around connecting bolt 15 in relation to fixed arm 3 to a limited extent. The limitation of the pivoting ability of pliers arm 2 relative to fixed arm 3 is predetermined by a stop cam 16 , which can come into contact with a corresponding stop surface 17 on the fixed arm 3.

The connecting bolt 15 has a finger base 18, through which the connecting bolt 15 can be moved in its longitudinal axis direction. The displacement occurs against a leaf spring 19, which is screwed to the clamp arm 2 (see figure 2).

The connecting bolt 15 has a first area with a toothing, which intersects with the toothing 11. The area with the toothing is joined on the connecting bolt 15 by an area without toothing. The length of the connecting bolt 15 is selected such that the connecting bolt 15, which is arranged in its first end position with the toothed area of the toothing 11, can be displaced via the finger socket 18. that the connecting bolt 15 in its second end position is only guided by the non-toothed area in the opening 10, so that the connecting bolt 15 can be displaced in this end position in the direction of the longitudinal axis of the opening 10.

Furthermore, a locking device 20 in the form of a plate-shaped element 21 is arranged on the connecting bolt 15.

In figures 7, 7A, 7B, 8 and 8A these plate-shaped elements 21 are represented and it can be seen that these plate-shaped elements 21 prevent during a displacement of the pincer arm 2 in relation to the fixed arm 3, that the toothed section of the connecting bolt 15 enters due to the leaf spring 19 in the toothed area of the opening 10, insofar as the plate-shaped elements 21 lie on surfaces of the section 7. If carried on the contrary, the pincer arm 2 from the position shown in figure 7 to the position shown in figure 8 relative to the fixed arm 3, then the plate-shaped elements 21 with diametrically opposite arrangement on the connecting bolt 15, are placed in such a way that it extends in the direction of the longitudinal axis of the opening 10, the width of the plate-shaped elements 21 being less than the spacing of the tips of the teeth of the two toothings 11 arranged opposite each other. In the position shown in Figure 8, it can be carried in this way the connecting bolt 15 through the leaf spring 19 back to an end position that blocks the displacement movement.

Plate-shaped elements 21 are arranged diametrically opposite each other on the connecting bolt 15.

FIG. 2 furthermore shows a guide rib 22 arranged on the jaw 6, which is guided by a groove 23 in the region 7 of the fixed jaw 5. Corresponding grooves 23 are arranged on both sides of the region 7 and serve for the guide of guide ribs 22 with opposite arrangement on the jaw 6.

Figures 2 to 7 show the pliers 1 with an open plier jaw 24, which is determined by surfaces 25 of the pliers arm 2 or of the fixed arm 3. In contrast, figures 1 and 8 show the pliers 1 with open jaws. pliers 24 closed, in which case the surfaces 25 of pliers arm 2 and fixed arm 3 are in contact.

reference list

1 pliers

2 Plier arm

3 Fixed arm

4 gripping element

5 Fixed jaw

6 Jaw

7 zone

8 Cutout

9 Spike

10 opening

11 Toothed

12 Cutout

13 Rib

14 Drilling

15 Connecting bolt

16 stop cam

17 Stop surface

18 Finger Pad

19 Leaf spring

20 locking device

21 Plate element

22 Guide rib

23 slot

24 Pincer Jaw

25 Surface

Claims (4)

1. Pincer with a mobile pincer arm (2), which configures a mobile jaw (6), and a fixed arm (3), which configures a fixed jaw (5), the fixed arm (3) being connected through a connection bolt (15) with the pincer arm (2) mobile with limited pivoting movement and the connection bolt (15) passing through an opening (10) in the fixed arm (3), the connection bolt (15) being able to move ) along the opening (10) for the adjustment of a jaw width between the mobile jaw (6) and the fixed jaw (5), the connection bolt (15) being able to move in its longitudinal axis in relation to the arm of mobile pincer (2) and with the fixed arm (3) between an end position that blocks a displacement movement of the fixed arm (3) with respect to the mobile pincer arm (2) and one that unlocks the displacement movement, being configured the connecting bolt (15) so that it can be locked in the final position that unlocks the displacement movement, characterized by that the connecting bolt (15) has a locking device (20), with which the connecting bolt (15) can be fixed in its axial mobility in relation to the fixed arm (3) to it and the locking device ( 20) can move in the final position that unlocks the displacement movement, by means of a displacement movement of the mobile pincer arm (2) in relation to the fixed arm (3) between a toothing (11) arranged in the opening (10) and a toothing arranged on the connecting bolt (15). 2. Pliers according to claim 1, characterized in that the opening (10) has a toothing (11) arranged on at least one of its longitudinal sides and that the connection bolt (15) has a toothing that goes along with it, which is extends over a partial part in the direction of the longitudinal axis of the connecting bolt (15) and that the combing toothing of the connecting bolt (15) can be disengaged by axial displacement of the connecting bolt (15) from the toothing (11) in the opening (10). Pliers according to claim 1 or 2, characterized in that the fixed arm (3) has a recess in which the locking device (20) can engage. Pliers according to one of claims 1 to 3, characterized in that the connecting bolt (15) is mounted non-rotatably with respect to the fixed arm (3) and the pliers arm (2) rotatably movable around the connection bolt (15) or that the connection bolt (15) is housed non-rotatably with respect to the mobile pincer arm (2) and rotatably with respect to the fixed arm (3).