Vice

Abstract

The invention relates to a vise comprising a fixed rear jaw (1) and a front jaw (2) which is displaceable along a guide relative to the rear jaw (1) via a threaded spindle (3), one end of which is rotatably mounted in the front jaw (2), wherein the threaded spindle (3) is provided with a spindle head (31) which has a through bore (32) through which a lever (4) is penetrated, and the threaded spindle (3) has an external thread (33) which corresponds to an internal thread arranged on the rear jaw (1), wherein means (5) for clamping the lever (4) are arranged on the spindle head (31).

Description

[0001] The invention relates to a vise comprising a fixed rear jaw and a front jaw which is displaceable along a guide relative to the rear jaw via a threaded spindle, one end of which is rotatably mounted in the front jaw, wherein the threaded spindle is provided with a spindle head which has a through bore through which a lever is inserted, and the threaded spindle has an external thread which corresponds to an internal thread arranged on the rear jaw.

[0002] Vises are known in a wide variety of designs. They feature a fixed jaw and a front jaw that can be moved relative to it via a lead screw. The lead screw is equipped with a handle, allowing it to rotate. The handle is guided in a bore in the lead screw and has a stop at each end. A rotational movement of the handle causes a longitudinal movement of the lead screw and the movable front jaw, clamping or releasing a workpiece between the jaws. For mounting on a base, vises typically have a base with holes for mounting screws. Such a vise is described, for example, in EP 1 884 317 A1.

[0003] The familiar vises meet the requirements placed upon them. However, these vises have the disadvantage that, when not in use and if not in a horizontal position, the handle slides down into its lowest position in the spindle bore due to gravity, so that the stop facing away from the floor rests on the lead screw. In this position, the handle protrudes completely towards the floor, except for the part facing away from the floor resting on the lead screw and the section located in the spindle bore. Since vises are predominantly mounted on workbenches that have drawers beneath their work surface, this leads to a limitation in the use of the drawers.In such a situation, using the drawer requires either moving the handle into a horizontal position by turning the spindle or pushing the handle upwards and holding it there to open the drawer. In the latter case, the user must hold the handle in this position, leaving only one hand free to operate the drawer and, for example, to remove items from it. This is cumbersome, makes using the drawer more difficult, and hinders the user's work.

[0004] Against this background, the present invention aims to create a vise in which the handle is prevented from slipping into its outermost position, where the stop facing away from the ground rests on the screw spindle. According to the invention, this objective is achieved by the features of claim 1.

[0005] The invention provides a vise in which the handle is prevented from slipping into its outermost position, where the stop facing away from the ground rests on the screw spindle. The solution according to the invention makes it possible to adjust a clamping force acting on the handle, which allows manual movement of the handle within the screw spindle bore while simultaneously preventing it from slipping on its own. Consequently, the handle remains in the desired position even when in a vertical orientation.

[0006] In a further development of the invention, the means for clamping the lever are formed by a pressure piece that can be screwed into an internal thread in the spindle head. This design allows stepless adjustment of the pressure piece's position in the spindle head.

[0007] In one embodiment of the invention, the pressure piece has a profile for actuation by means of a tool. This embodiment enables simple and reliable screwing of the pressure piece into and out of the spindle head.

[0008] Advantageously, the pressure piece incorporates a ball under the influence of a compression spring. The use of a spring-loaded ball allows the clamping force to be varied depending on the ball's insertion depth into the pressure piece body, as the force exerted by the spring increases with increasing insertion depth.

[0009] In another embodiment of the invention, the ball protrudes from the pressure piece in certain areas. This ensures that the body of the pressure piece does not come into direct contact with the lever, but rather the ball, which enters the body of the pressure piece as it is screwed in further. This creates a wide range for stepless increases in the clamping force, which reaches its maximum when the ball has fully entered the body of the pressure piece.

[0010] Other embodiments and configurations of the invention are specified in the remaining dependent claims. An exemplary embodiment of the invention is illustrated in the drawings and is described in detail below. The drawings show: Figure 1: a three-dimensional representation of a vise; Figure 2: a view of a spindle; Figure 3: an enlarged representation of detail "C" in Figure 2 Figure 4 shows the section along line B - B in Figure 2Figure 5 shows a view of a printing piece according to the invention; Figure 6 shows the front view from the left of the in Figure 5 illustrated pressure piece; Figure 7 the three-dimensional section-by-section representation of a spindle with lever and screwed-in pressure piece.

[0011] The vise chosen as an exemplary embodiment essentially consists of a fixed rear jaw 1 and a front jaw 2, which is slidably arranged relative to the rear jaw 1 along a guide (not shown). The rear jaw 1 and the front jaw 2 are connected to each other via a spindle 3. The spindle 3 can be rotated by means of a lever 4, also called a crank rod or spindle wrench.

[0012] The rear jaw 1 is manufactured as a drop-forged part and essentially consists of a base body 11 to which a front jaw 12 is formed. At its lower end facing the floor, a base 13 is formed on the base body 11, which in the exemplary embodiment is provided with two holes 14 for attachment to a workbench, a welding table or the like.

[0013] The front jaw 2 is also designed as a drop-forged part. It is essentially formed from a base body 21 to which a front jaw 22 is formed.

[0014] The spindle 3 has a spindle head 31 at one end. The spindle head 31 is provided with a through bore 32, which is penetrated by the lever 4. At its end opposite the spindle head 31, the spindle 3 is provided with a thread 33. Between the thread 33 and the spindle head 31, a circumferential groove 34 is provided in the spindle 3 for receiving a snap ring.

[0015] The lever 4 is made of round steel. At both ends, the lever 4 is provided with a stop 41, which in the exemplary embodiment is designed as a thickened end piece, thus preventing the lever from falling out of the bore 32 of the spindle 3. Other designs of the stops 41 are also possible.

[0016] The spindle head 31 has means 5 for clamping the lever 4. In the exemplary embodiment, the means 5 for clamping the lever 4 are formed by a pressure piece 51 and an internal thread 52 in the spindle head 31.

[0017] The pressure piece 51 consists of a cylindrical body having an external thread 511 that corresponds to the internal thread 52 in the spindle head 31. The internal thread 52 is aligned coaxially with the centerline of the spindle 3. As shown in particular Figure 3As can be seen, the internal thread 52 extends from the end face of the spindle head 31 to the bore 32 in the spindle head 31.

[0018] The pressure piece 51 is closed at one end face. On this end face, the pressure piece 51 has a profile 512 for actuation by a positively fitting tool, e.g., a screwdriver. In the exemplary embodiment, the profile 512 is simply formed by a single slot. Alternatively, any other suitable shape can be used, in particular a Phillips head, internal polygon, external polygon, etc.

[0019] The pressure piece 51 has a ball 513 which is under the influence of a compression spring (not shown) located inside the body of the pressure piece 51. In a variation of the embodiment, a bolt can also be used instead of the ball. The ball 513 protrudes from the pressure piece 51 in certain areas. In the embodiment, it is made of stainless steel. Other materials, e.g., plastic, can also be used.

[0020] With the aid of the invention, it is possible to adjust a clamping force on the lever to prevent it from slipping on its own. For this purpose, in the exemplary embodiment, the pressure piece 51 is screwed into the internal thread 52 in the spindle head 31. Due to the profile 512, this can be done easily, for example, with the aid of a screwdriver. Figure 1 The pressure piece 51 is only partially screwed into the internal thread 52 in the spindle head 31.

[0021] As the pressure piece 51 is screwed in further, the ball 513 emerges from the internal thread 52 into the bore 32 in the spindle head 31. It then comes into contact with the lever 4. As the pressure piece 51 is screwed in further, the contact between the lever 4 and the ball 513 remains unchanged. However, the position of the ball 513 relative to the body of the pressure piece 51 changes. The ball 513 presses into the interior of the body against the force of the compression spring located inside the pressure piece 51. In the extreme case, the ball 513 enters the body of the pressure piece 51 completely, so that the end face of the body of the pressure piece 51 facing the lever 4 comes into contact with the lever 4. Preferably, in this installation position, the end face of the pressure piece 51, provided with the profile 512, is flush with the end face of the spindle head 31, as shown in Figure 7 is shown.

[0022] The clamping force between the ball 513 and the lever 4 depends on the screw-in depth of the threaded insert 51 into the internal thread 52 in the spindle head 31. As long as the ball 513 is not in contact with the lever 4, no clamping force is generated. The lever 4 then behaves like a vise without a clamping mechanism. A very small clamping force is generated upon initial contact of the ball 513. This force increases as the threaded insert 51 is screwed further into the internal thread 52, because this increases the force of the compression spring on the ball 513. The maximum clamping force is reached when the end face of the pressure piece 51 facing the lever 4 makes contact with the lever 4.

Claims

1. Vise comprising a fixed rear jaw (1) and a front jaw (2) which is displaceable along a guide relative to the rear jaw (1) via a threaded spindle (3) the one end of which is rotatably mounted in the front jaw (2), wherein the threaded spindle (3) is provided with a spindle head (31) having a through bore (32) through which a lever (4) passes, and the threaded spindle (3) has an external thread (33) which corresponds to an internal thread arranged on the rear jaw (1), characterized by the fact that Means (5) for clamping the lever (4) are arranged on the spindle head (31).

2. Vise according to claim 1, characterized by the fact that the means (5) for clamping the lever (4) are formed by a pressure piece (51) which can be screwed into an internal thread (52) in the spindle head (31).

3. Vise according to claim 2, characterized by the fact that the pressure piece (51) has an external thread (511).

4. Vise according to one of the aforementioned claims, characterized by the fact that the pressure piece (51) has a profile (512) for actuation by means of a tool.

5. Vise according to one of the aforementioned claims, characterized by the fact that the pressure piece (51) has a ball (513) which is under the influence of a compression spring.

6. Vise according to claim 5, characterized by the fact that the ball (513) protrudes from the pressure piece (51) in certain areas.

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