FI92314C - Arrangement for attaching an elevator cable to a cable tray - Google Patents

Description

9231 4

ARRANGEMENT FOR ATTACHING THE ELEVATOR GUIDE TO ITS GUIDE

The invention relates to an arrangement according to the preamble of claim 1 for attaching an elevator cable to a guide platform.

Due to the shrinkage of the concrete used in the building and other causes, the elevator guides are subjected to vertical forces which tend to change the alignment of the guides. The forces are applied to the conductors via fasteners. One known solution for attaching an elevator guide to a guide base is disclosed in EP application No. 0448839, which solution allows the guide to move in the longitudinal direction of the guide, but not in the transverse direction of the guide. In the conductor fastener according to said publication 15, the conductor is pressed against the base by a roller-like, flanged fastener, the lower surface of which is machined conically to correspond to the shape of the inclined surface of the conductor. This is an expensive solution compared to our own solution. In addition, the lateral contact between the fastener and the guide is very "olmt" in the form of lines and, in the case of high forces, can cause puncture peaks so large that either the fastener itself or the guide is damaged. Another disadvantage is that the structure implemented with two pairs of disc springs and a sleeve is a very complex solution requiring precise manufacturing.

The object of the present invention is to solve the above-mentioned problems by arranging the fastening of the conductors in a new way so that the modifications in the building 30 do not significantly impair the alignment of the conductors. To achieve this, the invention is characterized by what is set forth in the characterizing part of claim 1. The invention is further characterized by what is stated in the other claims. The invention provides a conductor attachment in which the grip of the conductor clamps 35 from the conductor in the direction of the conductor is low, without, however, compromising the transverse positioning of the conductor. A small guide grip means that, in practice, the guide fasteners slide down the guide line with the shrinkage of the building 9231 4 2, and do not apply such a high vertical force to the guide line that it bulges into a bend in the guide. The Hyoty invention provides a price for a direct guide line as the next driving comfort and, in terms of cost, also for the reduced need for post-charter line 5. An advantage is also the simplicity of the installation components required in the arrangement. In particular, compared with the solution according to the above-mentioned EP application, the arrangement according to the invention is remarkably advantageous, simple and reliable in operation.

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The invention will now be described in more detail with reference to the accompanying drawings, in which Fig. 1 shows an elevator cable attached to a conductor base in the longitudinal direction of the conductor, Fig. 2 another conductor fastener according to the invention.

Figure 1 shows an elevator guide 1 attached to the guide platform 2 as seen in the longitudinal direction of the guide. The conductor is attached to each side of the conductor spindle 4 by a conductor fastener 3.

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Figure 2 shows a front view of a short bar of an elevator guide 1 attached to a base 2. The width of the mounting according to the guide 4 is set using the long mounting holes 5 of the base plate 2, to which the guide fasteners 3 are fastened with screws 6 and 30. The long holes 5 of the conductor base can also be used for alignment of the conductor line. The connection of the guide platform to the elevator shaft is not shown.

Figure 3 shows a conductor fastener 35 3 according to the invention in more detail. The body portion 7 of the fastener 3 is formed of two rectangular plate pieces 7a, 7b welded together. On the side of the guide 1, the bale plate piece 7a extends further than the lower one 7b. Thus, in the body 7 3 9231 4, two support surfaces 8a, 8b are formed against the guide, to which at least the edges of the surfaces 8a, 8b correspond to the back 4 of the guide. The surface 8a in the uppermost body-forming body 7a presses the conductor 1 against the base 2 and the surface 8b in the lower body 7b 5, i.e. the end of the lower plate, supports the guide 1 in the lateral and reverse directions. Through the body 7 of the fastener there is a hole 9 in which a sleeve 10 is placed. flexibility in this direction. The length of the sleeve is somewhat greater than the thickness of the body part 7 and the outer diameter of the sleeve is smaller than the base 11 of the fastening screw 6. Thus a gap 14 remains between the screw head 11 and the body part 7. 15a, 15b) a resilient element 15 through which a support force is caused from the screw head 11 to press the body part 7 so that it further presses the guide 1 onto the base plate 2. The size of the support force depends on the selected disc springs 15 and the size of the gap 14. Instead of the body part 7 being formed of two plate pieces 7a, 7b, it could also be a Z-shaped plate body made of poplar with support surfaces 8a, 8b for a support force parallel to the base plate 2 and perpendicular to the base plate 2.

Figure 4 shows the spring force of a disc spring as a function of the displacement due to compression. The vertical axis F represents the force and the position on the horizontal axis d represents the length of the disc spring (the height of the disc). When the disc spring is compressed, the force first increases approximately linearly. When pressing, an additional 30 is introduced into the area a, where the displacement affects only the required pressing force. Further, when compressed, the amount of force required increases sharply, i.e. comes to area b, where the disc spring can practically be kept almost uncompressed.

When the fastener 3 according to Fig. 3 is used to fasten a guide 1 with a thicker back 4, it follows that the pair of disc springs 15 in the slot 14 are compressed more tightly. Likewise, there is, of course, variation between the compression of the slots in the various fasteners of the conductor line due to the variation in the dimensioning tolerance of the conductor back 4. When the disc springs 15 of the fastener 3 are selected so that the operating point x in the curve 5 of Fig. 4 falls in an area where the effect of the displacement on the force is small, very small differences in the compressive force of the different fasteners are easily achieved. Suitably loose disc springs 15 in one sufficiently close area b from the area a, the selected operating point x results in a firm, low-clearance, but at the same time only 10, guide-tight fastening.

Figure 5 shows a second fastener 3 according to the invention. The body part 7 consists of two separate pieces 7c, 7d, of which the lower body 7d acts as a support against the lateral movement of the guide 1 and the upper body presses the guide 1. to the base 2. The fastening is by means of a hole in the piece as a screw fastening. The fixing screw 6 has a cylindrical collar 16 which presses the lower body 7d into the base 2. The upper body body 7c has a hole 20 larger than the collar 16 of the screw. The upper body 7c is arranged from its hole around the screw 6 between the screw head 11 and the lower body 7d. Between the screw head and the upper piece there is a pair of disc springs 15, the spring force of which presses the upper piece against the back 4 of the guide, just as the disc springs 25 press the body part in the fastener of Fig. 3. It is advantageous to make the upper body part 7c into a pyramid (to resemble a perforated bread), in which case its installation does not require special precision.

The invention has been described above by means of some preferred embodiments thereof. However, the disclosure is not to be construed as limiting, but embodiments of the invention may vary within the limits defined by the claims.

Claims (3)

An arrangement for fixing a lift guide (1) with a T-shaped cross-section at a guide support (2) with guide clamps (3), which comprises a body part (7) with a supporting surface (8a) pressing the guide flange (4) ) towards the guide base (2) and a second supporting surface (8b) which provides a substantially rigid, supporting force, directed along the guide base (2), against the guide base (2), which is supported by a hole (9) with a hole (9). for a fastener (6) which fixes the body part (7) at the guide bottom (2), and in which arrangement the supporting force with which the guide clip (3) presses against the guide flange (4) and thereby presses the guide (1) against the support (2). is transmitted by an elastic element (15), characterized in that the working point (x) of the elastic element (15) is within the deformation interval (a) where the spring force is relatively little breathed. 2. Arrangement according to claim 1, characterized in that the elastic element (15) is made up of at least one plurality spring (15a, 15b) and is placed adjacent to the fastener (6). . 3. Arrangement according to claim 1 or 2, characterized in that the frame (7) of the clamp consists of two parts, of which the portion (7d), which is closer to the guide support, which takes up the action acting on the guide (1) and along the guide support ( 2) the directed lateral force is intended to be inelasticly attached to the guide support (2) with the fastener (6), and the longer portion (7c) covered by the guide support is pressed against the guide by the elastic element (15). li