FR2768957A1 - Vice jaws for bench vice - Google Patents

Abstract

The jaw consists of a body (11) with at least three plungers (12) sliding independently of each other and parallel in the direction of the axis (x-x') whose extension (e) in relation to the body is adjustable by the action of a screw (43) and adjusting nut (44). This allows adjustment, before clamping, of the pivoting end pads (13) of the plungers, these being detachable.

Description

 The present invention relates to a jaw with removable adjustable keys, having a key adjustment system before clamping the workpiece. It is therefore a presetting, which is carried out individually for each key.

 The presetting is done manually thanks to a knurled nut (44) driving a threaded sheath (43), trapping part of the spring (14), itself mounted at the rear on the threaded part (121). The direction of rotation of the nut causes the pivoting tightening head (13) to move back or forward. The adjustment of the keys (12) is determined according to the part to be tightened, according to an extension (e).

 FIG 1 shows a top view of the jaw (10).

 FIG 2 shows a side view.

 FIG 3 shows a top view in section with a single drawn key.

 According to the example illustrated in FIGs 1, 2 and 3, the jaw (10) comprises a body (11) having four laminated fixing holes. The body (11) is provided with three keys (12) which are movable with respect to each other, in translation in the directions x-x 'parallel to each other. They are also parallel to the axis of the vice screw once the jaw is fixed on it. The keys (12) are each formed by a rod of axis x-x 'which slides in a small part of the bore (front part) emerging, passing through the body (11), serving as a guide. The major part has a smooth coaxial hole with a flat bottom of large diameter, complementary to the bore and the body (11). Each key (1 2) has at a front end, a clamping head (13) mounted, pivoting, along an axis y-y ', by a shouldered axis (17) easily removable without tools on a substantially vertical axis. Each button (12) has a shoulder (122) which during assembly comes into abutment in the flat-bottom hole thus delimiting the extension (e). The other rear end of the button (12) is of smaller section and threaded (121). It also has a small groove or a flat, on the top, not far from the shouldered axis <17) perpendicular to it and parallel to the direction x-x '.

 The body (11) has a deep groove perpendicular to the axis xx 'of the keys (12) in which is engaged a knurled nut (44), immobilized in translation relative to the body (11), between two parts of the latter comprising each a smooth hole.

 At the rear, the spring (14) is mounted coaxially with the threaded part so as to press the button (12), at a shoulder defined by the reduction in cross-section of the threaded part (121). On this is mounted the external threaded sheath (43) trapping part of the spring, since it is pierced with a non-through hole and another smaller hole passing through it slightly, larger than the section of the part threaded (121). 11 has externally on the threaded part, a small groove or a dish over its entire length.

 The body (11) also has on the top 6 small tapped holes thus distributed: 3 at the front, each opening in a different bore in the axis x-x 'and are aligned. The other 3, on the right side of the body groove (11), each opening into a different smooth hole, are also in the axis xx 'and aligned, in which the screws (18) will take place, in order to avoid the rotation of the keys (12) and of the sleeves (43) during the presetting with the knurled nut (44).

 The threaded sleeve is engaged with the groove or flat, on the top, same thing for the key (12), to coincide with the screws (18), the sleeve (43) coming to be screwed on the nut (44) allowing the key <1 2) to move, by exerting pressure, at the end of the pivoting head according to F1. The spring (14) trapped by the sheath will compress. The threaded part (121) sliding through it exits at the rear of the sleeve on this threaded part (121) where a hexagonal nut (15) is screwed. When the tightening is obtained, it can be screwed until it comes into contact with the rear of the sheath (43) and during loosening, this will keep the spring (14) under tension, in case there would have to tighten one of the identical pieces. Having a clamping system with spring tension makes it possible to clamp fragile parts. In addition, the easily removable swivel heads (13) can be of several kinds: V-shaped, semi-circular, with squared jaws, plastic jaws, rubber, etc.

 Having completely removable keys makes it possible to interchange the springs (14) according to the part to be clamped.

Claims (3)

CLAIMS: 1 - Jaw for a device of the vice or similar type of clamping and immobilization, characterized in that it comprises a body (11) provided with at least three keys (12), which are movable relative to one another to others, in translation in substantially parallel directions (x-x ') and whose extension (e) relative to the body is adjustable, and this thanks to a mechanical system screw (43) nut (44), allowing obtain a pre-adjustment before tightening the swivel keys (1 3), this being removable. 2 - Jaw according to claim 1, characterized in that the end has  a removable head / swivel (13), easily removable by a pin 17, this can other of several kinds: V, semicircle, with squared jaws, plastic, rubber. 3 - Melon jaw claim 1 or 2, characterized in that the  springs (14) mounted on the keys (12) can be interchangeable  force of different pressures depending on the part to be clamped.