LU84835A1 - METAL CABLE TRACTION AND LIFTING APPARATUS - Google Patents

Description

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The invention relates to a wire rope traction and lifting device in which the cable passes through two identical clamping devices, one of which is fixed and the other mobile, under the control of a hand lever, as described in patent No. 260,697.

The control lever of known devices of this kind has the following drawbacks: - It needs to be provided with machined pins pivoting in rings attached to the inner face of the half-casings of the device, - it requires good alignment of the device's half-casings so as not to encounter hard points during the maneuver, - it must be provided with a clear opening to allow the passage of the cable regardless of the movement of the lever.

In order to overcome these drawbacks of conventional traction and lifting devices, the device according to the invention is characterized in that it comprises a central control lever clamped at its upper part between two lateral flanges pivotally mounted on a transverse axis fixed carried in openings opposite the half-casings of the device, the fixed transverse axis being pierced in the axis of the device with a circular opening for the passage of the cable.

The accompanying drawing shows schematically and by way of example, an embodiment of the apparatus according to the invention.

Figure 1 is a side elevational view of the housing being open.

Figure 2 is an axial sectional view of the control lever according to II-II of Figure 1, showing the lever mounted between the half-casings of the device.

As shown in FIG. 2, two lateral flanges are assembled by means of transverse axes 3 to clamp between them, at their upper part, a central control lever k. At their intermediate part the flanges 1, 2 are pivotally mounted, by circular openings 5 of large diameter, on a fixed transverse axis 6 mounted by its ends 7 in openings 8 opposite the two half-casings 9 of the device.

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For the passage of the cable, the transverse pivot axis 6 is pierced, in the axis of the device, with a circular opening 11 and, as shown in FIG. 1, a part 12 in the form of a funnel is mounted on the axis 6 to ensure proper guidance of the cable through the opening 11 (Figure 2).

In 13 and 1Ψ are shown, on either side of the transverse pivot axis 6, transverse axes ensuring the connection between the flanges 1, 2 and on which the control rods 15, 16 of the two are respectively coupled device clamps.

Advantageously, the circular opening 11 pierced through the fixed transverse axis 6 of pivoting is associated with a part in the form of a funnel 12 which ensures good guidance of the cable through this opening.

It is understood that the control lever provides the following advantages: a) the transverse axis 6 carrying the control lever k is fixed in the half-casings 9 of the device and, as a result, is hardly subject to alignment errors of these; b) the bearing surfaces of the lateral flanges 1, 2 of the control lever k on the fixed transverse axis 6 can be of a large diameter and consequently can be subjected to loads over a large area, which is favorable for maintaining a lubricant; c) the passage 11 of the cable through the fixed transverse axis 6 does not need to be oblong, but simply cylindrical.

In addition, it can be fitted with a funnel-shaped part 12 which enables the start of cable guidance to be transferred deep into the device at the time of its introduction, which most certainly leads the cable to the outlet of the cable. 'apparatus.

Claims (3)

1. Cable traction and lifting device, characterized in that it comprises a central control lever (4) clamped between two lateral flanges (1, 2) pivotally mounted on a fixed transverse axis (6) carried in openings (8) opposite the half-casings (9) of the device, the transverse axis (6) being pierced in the axis of the device with a circular opening (11) for the passage of the cable. 2. Apparatus according to claim 1, characterized in that a part (12) in the form of a funnel is associated with the circular opening (11) of the transverse axis (6) to guide the cable through this opening. 3. Apparatus according to claim 1 or 2, characterized in that, on either side of said transverse pivot axis (6), the lateral flanges (1, 2) are joined by transverse axes (13, H) on which are coupled the control rods (15,16) of the cable clamps.