JP2006089259A - Rope securing device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it hard for a rope to be damaged when it is pulled in a diagonal direction to a vertical direction and also prevent vibration and noise from occurring in a rope securing device for securing the rope suspending the car of an elevator to a guide rail. <P>SOLUTION: A bracket 2 is fitted to the guide rail 108 guiding the car in the hoisting direction. A rope securing rod 3 is coaxially fitted to the end part of the rope 103 suspending the car. A shaft 5 is horizontally and axially rotatably supported on the bracket 2. The rope securing rod is vertically fitted to the shaft. When a tension tilted relative to the vertical direction is imparted from the rope to the rope securing rod, the shaft is rotated to keep the rope securing rod in alignment with the rope. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rope fixing device for fixing an end of a rope that drives an elevator car up and down to a guide rail.

  14 is a perspective view schematically showing an example of a conventional 2: 1 roping type machine room rest traction sheave elevator, FIG. 15 is a front view of a conventional rope fixing device, and FIG. 16 is a drawing of the rope fixing device of FIG. FIG. 17 is a schematic front view when the elevator car of FIG. 14 is on the top floor.

  As shown in FIG. 14, a pair of car sheaves 102 is provided on the upper part of the car 101, and the car 101 is suspended by a rope 103 that is stretched over these. Further, the rope 103 is hung on a sheave 105 of a driving device 104 provided at the upper part of the hoistway, and is hung on a counterweight sheave 107 provided on an upper part of the counterweight 106. Both ends of the rope 103 are fixed by a rope fixing device 109 attached to an upper portion of a guide rail 108 that guides the car 101 in the up-and-down direction.

  As shown in FIGS. 15 and 16, the rope fixing device 109 is attached to the guide rail 108 via a U-shaped reinforcing member 112 in a plan view attached to the back surface of the guide rail 108 with a bolt 110 and a nut 111. Yes. A bracket 113 is attached to one side end of the reinforcing member 112, and includes a rectangular plate-like main body 113a and a pair of left and right triangular support portions 113b attached to the front surface thereof. A plate-like base 115 is attached to the upper ends of the main body 113a and the support portions 113b by welding.

  A fixed rod 116 is coaxially attached to the end of the rope 103, and this fixed rod 116 is inserted into a through hole 115 a formed in a direction perpendicular to the base 115. A coil spring 117 is loosely fitted coaxially on a portion of the fixed rod 116 protruding above the base 115, and its upper end abuts against the lower surface of a washer-shaped stopper 118 inserted through the upper end of the fixed rod 116. Is in contact with a nut 119 screwed to the upper end of the fixed rod 116.

  By the way, the conventional rope fixing device 109 is attached to the guide rail 108, and when the car 101 is on the lower floor, there is a sufficient distance between the car sheave 102 and the rope fixing device 109. The rope 103 is pulled almost vertically downward.

  However, as shown in FIG. 17, when the car 101 is at or near the top floor, the car sheave 102 and the rope fixing device 109 approach each other, and the rope 103 is pulled obliquely. If the overhead dimension is to be shortened by the machine room-less elevator, the car sheave 102 and the rope fixing device 109 are closer to each other and the angle becomes severe.

  In such a state, the force in the direction that is in tolerance with the axial direction of the rope fixing rod 116 is repeatedly applied to each part of the rope fixing device 109 by the up and down of the car 101, so that it is more than a case where a simple vertical load is applied. It is strict in strength and needs to be firmly constructed so that it can withstand repeated fatigue.

  That is, when the rope 103 is pulled obliquely, the rope fixing rod 116 comes into contact with the corner of the through hole of the base 115 and receives a bending force, so that the strength is severe and the life is shortened. Moreover, since the connection part of the rope 103 and the rope fixing rod 116 also receives bending force, the same problem arises.

  Furthermore, when the rope fixing rod 116 contacts the through hole of the base 115, there is a problem that vibration and noise are generated.

  The present invention has been made in view of the above problems, and its object is to receive a load in a direction in which the rope fixing rod is in a tolerance with the axial direction even when the rope is pulled in a direction inclined with respect to the vertical direction. It is an object of the present invention to provide a rope fixing device for an elevator which is advantageous in terms of strength and has a long life and is free from vibration and noise.

  In order to solve the above problems, an elevator rope fixing device according to the present invention includes a bracket attached to a guide rail that guides the car in the up-and-down direction, and a coaxial end on the end of the rope that suspends the car. An attached rope fixing rod and the rope fixing rod when the rope fixing rod is attached perpendicularly to the bracket, and the rope fixing rod is subjected to a tensile force inclined with respect to the vertical direction from the rope. Comprises rod attachment means for holding the rope fixing rod so as to keep a straight line with the rope.

  According to the present invention, even when the rope is pulled in a direction inclined with respect to the vertical direction, only the load in the axial direction acts on the rope fixing rod, so that the connection portion with the rope fixing rod and the rope is hardly damaged. As a result, the service life is extended and vibration and noise are not generated.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a front view of a rope fixing device according to a first embodiment of the present invention, FIG. 2 is a side view of the first embodiment, and FIG. 3 is an explanatory view of the operation of the first embodiment. In addition, in this embodiment, about the part other than a rope fixing apparatus, the code | symbol same as the said prior art example is attached | subjected and description is abbreviate | omitted.

  The rope fixing device 1 shown in FIGS. 1 and 2 is used for a machine room-less elevator, and a reinforcing material 112 is provided at the upper end of a guide rail 108 that guides a car (not shown) in the up-and-down direction. A bracket 2 attached via a rope, a rope fixing rod 3 coaxially attached to an end of a rope 103 for suspending the car, and a rod attachment means 4 for attaching the rope fixing rod 3 to the bracket 2. I have.

  The bracket 2 is made of a steel plate, and has a rectangular plate-shaped main body 2a and a pair of left and right triangular support portions 2b fixed to the front surface thereof by welding or a fastening member. Each support portion 2b is provided with a pair of circular through holes 2ba arranged in the front-rear direction.

  The rod attachment means 4 is attached to a pair of columnar shafts 5 that are supported rotatably and rotatably by the through holes 2ba of the respective support portions 2b, and portions protruding from the support portions 2b at both ends of the shaft 5. A retaining pin 6, a coil spring 7 that is loosely fitted to each rope fixing rod 3, a washer-like stopper 8 that is inserted into the upper end of each rope fixing rod 3 and is in contact with the upper end of the coil spring 7, and above And a nut 9 screwed onto the upper end of the rope fixing rod 3.

  A rectangular horizontal surface 5a is formed at the upper center of each shaft 5 so as to extend in the axial direction. The shaft 5 is formed with a pair of through holes 5b through which the rope fixing rod 3 penetrates in the axial direction, and the upper ends thereof open to the horizontal plane 5a.

  The coil spring 7 is loosely fitted coaxially to a portion of each rope fixing rod 3 protruding above the shaft 5 and its lower end is supported by a horizontal surface 5a. The upper end of the coil spring 7 is in contact with the lower surface of the stopper 8, and the upper surface of the stopper 8 is in contact with the lower surface of the nut 9. That is, the rope fixing rod 3 is elastically supported so as to be movable in the axial direction perpendicular to the shaft 5.

According to such a configuration, when the car approaches the top floor and the rope 103 tries to incline, each rope fixing rod 3 is given a tensile force inclined with respect to the vertical direction from the rope 103. Thus, each shaft 3 is rotated by the horizontal component of this tensile force, and as shown in FIG. 3, each rope fixing rod 3 is kept in a straight line with the rope 103. Therefore, in the state where the rope 103 is inclined. In addition, since only the axial force acts on the rope fixing rod 3 and the connecting portion between the rope fixing rod 3 and the rope 103, it is not damaged by the force in the direction intersecting the axial direction, and vibration and noise are generated. There is nothing.

  As shown in FIGS. 4 and 5, the support portions 2b of the bracket 2 are arranged so as to face each other in the front-rear direction, and the plurality of shafts 5 are supported by the bracket 2 in a state of being arranged in a row in the horizontal direction. Also good. In this case, the ropes 103 are pulled in directions approaching each other toward the car sheave attached to the car.

  Next, a second embodiment of the present invention will be described. FIG. 6 is a front view of the second embodiment of the present invention. In the following embodiments, the same reference numerals are used for the same or similar parts as those in the first embodiment, and duplicate descriptions are omitted.

  In this rope fixing device 10, the shaft 5 is rotatably supported by the support portion 2 b of the bracket 2 via a bearing 11. As such a bearing 11, for example, an oilless bush or a rolling bearing can be used.

  According to such a configuration, there is no possibility that the shaft 5 is rubbed against the bracket 2 due to friction generated between the shaft 5 and the bracket 2, and the rotation of the shaft 5 can be always smoothly performed.

  Next, a third embodiment of the present invention will be described. FIG. 7 is a front view of a third embodiment of the present invention, and FIG. 8 is a side view.

  In this rope fixing device 12, rod attaching means 13 for attaching the rope fixing rod 3 to the bracket 2 includes a plate-like base 14 attached horizontally to the upper end of the bracket 2, and a hemisphere placed on the upper surface of the base 14. Spring receiver 15, coil spring 16 loosely fitted to each rope fixing rod 3, a washer-like stopper 17 inserted into the upper end of each rope fixing rod 3 and abutting on the upper end of the coil spring 16, and above And a nut 18 screwed to the upper end of the rope fixing rod 3.

  The base 14 is formed of a steel material, and is fixed to the main body 2a of the bracket 2 and the upper ends of the support portions 2b by welding, fastening members, or the like. A plurality of through holes 14 a having a larger diameter than the rope fixing rod 3 are formed in the base 14 in the vertical direction.

  The spring receiver 15 has a flat upper surface and a spherical lower surface, and a central hole 15a that penetrates the rope fixing rod 3 is formed in a vertical direction so as to face the opening of the through hole 14a formed on the upper surface of the base 14. Has been placed.

  The coil spring 16 is loosely fitted coaxially to a portion of the rope fixing rod 3 protruding above the spring receiver 15, and the lower end is supported by the upper surface of the spring receiver 15. The upper end of the coil spring 16 is in contact with the lower surface of the stopper 17, and the upper surface of the stopper 17 is in contact with the lower surface of the nut 18. That is, the rope fixing rod 3 is elastically supported so as to be movable vertically and axially with respect to the base 14 and the spring receiver 15.

  According to such a configuration, when the car approaches the top floor and the rope 103 tries to incline, each rope fixing rod 3 is given a tensile force inclined with respect to the vertical direction from the rope 103. Become. Since the spring receiver 15 is rotated by the horizontal component of the tensile force, each rope fixing rod 3 is kept in a straight line with the rope 103 as in the first embodiment.

  Therefore, in the state in which the rope 103 is inclined, only the axial force acts on the rope fixing rod 3 and the connecting portion between the rope fixing rod 3 and the rope 103, so that damage may be caused by the force intersecting the axial direction. There is no vibration and noise.

  Next, a fourth embodiment of the present invention will be described. FIG. 9 is an enlarged view of the main part of the fourth embodiment of the present invention.

  The basic configuration of the rope fixing device 19 of the present embodiment is the same as that of the third embodiment, and the difference is that a counterbore 15 b is provided on the upper surface of the spring receiver 15. The counterbore 15b is formed so that the lower end of the coil spring 16 is fitted therein.

  According to such a configuration, the coil spring 16 can be prevented from being laterally displaced or tilted. Therefore, the coil spring 16 always receives a load in the axial direction, and the elastic force of the coil spring 16 can be fully exhibited. Further, vibration and noise caused by the coil spring 16 can be eliminated.

  Next, a fifth embodiment of the present invention will be described. FIG. 10 is an enlarged view of an essential part of the fifth embodiment of the present invention.

  The basic configuration of the rope fixing device 20 of the present embodiment is the same as that of the third embodiment, except that a spherical surface that receives and supports the spherical surface of the spring receiver 15 at the upper peripheral edge of the through hole 14a of the base 14 is different. Or a flat chamfer 14b formed over the entire circumference.

  According to such a configuration, since the contact area between the spring receiver 15 and the base 14 is increased and the load generated between them is dispersed, the spring receiver 15 can be smoothly rotated.

  Next, a sixth embodiment of the present invention will be described. FIG. 11 is an enlarged view of the main part of the sixth embodiment of the present invention.

  The basic configuration of the rope fixing device 21 of the present embodiment is the same as that of the third embodiment, and the difference is that an annular concave spherical washer 22 is provided between the spring receiver 15 and the base 14.

  A spherical support surface is formed on the upper end of the concave spherical washer 22 so as to be in close contact with the spherical surface of the spring receiver 15.

  According to such a configuration, since the spring receiver 15 is received and supported by the spherical surface, it can rotate smoothly. Also, since this type of washer is supplied as a commercial product, it is easier to manufacture than forming a chamfer on the base 14, and the cost can be reduced.

  Since the spring receiver 15 is positioned above the upper surface of the base 14 by providing such a washer, the present invention is applicable when there is a dimensional margin for providing the washer in the height direction.

  Next, a seventh embodiment of the present invention will be described. FIG. 12 is an enlarged view of the main part of the seventh embodiment of the present invention.

  The basic configuration of the rope fixing device 23 of the present embodiment is the same as that of the fourth embodiment, and the difference is that the spring receiver 15 is formed by a commercially available convex spherical washer. The convex spherical washer has a planar upper surface 15b, a side surface 15c orthogonal to the upper surface 15b, and a spherical lower surface 15d.

  According to such a configuration, in addition to the effect of the fourth embodiment, since the spring receiver 15 is formed of a commercially available washer, the effect of facilitating manufacture and cost reduction can be obtained. It is done.

  Next, an eighth embodiment of the present invention will be described. FIG. 13 is an enlarged view of a main part of the eighth embodiment of the present invention.

  The basic configuration of the rope fixing device 24 of this embodiment is the same as that of the fifth embodiment, except that a concave spherical washer 22 is fitted around the opening of the through hole 14 on the upper surface of the base 14. 14b is provided.

  According to such a configuration, the concave spherical washer 19 can be prevented from being displaced. If the concave spherical washer 22 is displaced, the rope fixing rod 3 may come into contact with the through hole 14a of the base 14 to prevent a smooth posture change of the rope fixing rod 3, but in this embodiment, Such a problem can be prevented from occurring.

  In each of the above embodiments, the case where the present invention is applied to a rope fixing device used for an elevator without a machine room has been described. However, the present invention is applied to a rope fixing device used for an elevator with a machine room. You can also.

  In addition, various modifications can be made to the above-described embodiments without departing from the gist of the present invention.

The front view of the 1st Embodiment of this invention. The side view of a 1st embodiment. Explanatory drawing of an effect | action of 1st Embodiment. The front view of the modification of 1st Embodiment. The side view of the modification of 1st Embodiment. The front view of 2nd Embodiment. The front view of 3rd Embodiment. The side view of 3rd Embodiment. The principal part enlarged view of 4th Embodiment. The principal part enlarged view of 5th Embodiment. The principal part enlarged view of 6th Embodiment. The principal part enlarged view of 7th Embodiment. The principal part enlarged view of 8th Embodiment. The perspective view which shows roughly an example of the conventional 2: 1 roping type machine room rest traction sheave type elevator. The front view of the conventional rope fixing device. The side view of the rope fixing device of FIG. FIG. 15 is a schematic front view of the elevator in FIG. 14 when the car is on the top floor.

Explanation of symbols

1, 10, 12, 19, 2123, 24 Rope fixing device 2 Bracket 3 Rope fixing rod 4 Rod mounting means 5 Shaft 7 Coil spring (supporting means)
8 Stopper (support means)
11 Bearing 13 Rod mounting means 14 Base 14b Recess 15 Spring receiver 15b Counterbore 16 Coil spring 17 Stopper 22 Concave spherical washer (support member)

Claims (10)

  A bracket attached to a guide rail that guides the car in the up-and-down direction, a rope fixing rod that is coaxially attached to an end of a rope that suspends the car, and the rope fixing rod that is perpendicular to the bracket And a rod for holding the rope fixing rod so that the rope fixing rod is kept in line with the rope when a tensile force inclined from the rope with respect to the vertical direction is applied to the rope fixing rod. An elevator rope fixing device comprising an attachment means.   The rod mounting means includes a shaft supported by the bracket so as to be rotatable around an axis and a support means for supporting the rope fixing rod on the shaft in a state orthogonal to the shaft. The elevator rope fixing device according to claim 1.   The elevator rope fixing device according to claim 2, wherein the shaft is rotatably supported by the bracket via a bearing.   The rod attaching means is attached to the bracket and faces a base in which a through hole having a larger diameter than the rope fixing rod is formed in a vertical direction, and an opening of the through hole formed in the upper surface of the base. A spring receiver in which the upper surface is flat and the lower surface is spherical and a central hole that penetrates the rope fixing rod is formed in a vertical direction, and is coaxial with a portion of the rope fixing rod that protrudes above the spring receiver The elevator rope fixing device according to claim 1, further comprising: a coil spring loosely fitted in a shape; and a stopper that is provided at an upper end of the rope fixing rod and receives the upper end of the coil spring.   The elevator rope fixing device according to claim 4, wherein a counterbore hole into which a lower end portion of the coil spring is fitted is provided on an upper surface of the spring receiver.   6. The elevator rope fixing device according to claim 4 or 5, wherein a spherical or flat chamfer for receiving and supporting the spherical surface of the spring receiver is formed on the entire periphery of the upper peripheral edge of the through hole.   The elevator rope fixing device according to claim 4 or 5, wherein a support member having a spherical support surface for receiving and supporting the spherical surface of the spring receiver is provided on the upper surface of the base.   8. The elevator rope fixing device according to claim 7, wherein the support member is a spherical washer.   The elevator rope fixing device according to claim 7 or 8, wherein a concave portion into which the support member is fitted is provided on an upper surface of the base. The elevator rope fixing device according to any one of claims 4 to 9, wherein the spring support is a spherical washer.

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