JP2008087903A - End support structure of wrapped member of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an end support structure of a wrapped member of an elevator capable of reducing a bending moment produced in a thimble rod. <P>SOLUTION: A spherical receiving seat 16 is disposed on a machine room floor 2a through a compression coiled spring 15. The thimble rod 12 locked to the car side end 4a of a main rope 4 is inserted into an insertion hole 16a of the spherical receiving seat 16. A seat surface 17a formed by the convex spherical surface of a spherical nut 17 screwed onto the thimble rod 12 is seated on the surface to be seated formed by the concave spherical surface of the spherical receiving seat 16 to lock the main rope 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a terminal support structure for a cord-like or belt-like winding member used in an elevator, and more particularly, an elevator winding that reduces bending moment generated in a thimble rod connected to an end portion of the winding member. The present invention relates to a member terminal support structure.

  A thimble rod is connected to each end of the main rope of the elevator, and the thimble rod is used to hold the main rope to the building frame. And in such a conventional elevator, the thimble rod was installed with the attitude | position which orient | assigns the running direction of a cage | basket | car.

  Therefore, when the end portion of the main rope is stretched so as to incline with respect to the traveling direction of the car, the thimble rod is pulled in a direction inclining with respect to its longitudinal direction, and a bending moment is applied to the thimble rod. May occur and the durability of the thimble rod may be reduced.

  In addition, the pulling direction of the thimble rod changes due to the inclination angle of the main rope with respect to the traveling direction of the car as the car moves up and down, so the magnitude of the bending moment that occurs in the thimble rod each time the car moves up and down There is a risk that the durability of the thimble rod may be further reduced by fatigue.

Therefore, in the technique disclosed in Patent Document 1, the tilt angle of the thimble rod with respect to the main rope is reduced by arranging the thimble rod in a posture that is in a straight line with the main rope when the car is positioned in the middle part of the lifting / lowering stroke. Thus, the bending moment generated in the thimble rod is reduced.
JP 2004-75362 A

  In the technique described in Patent Document 1, although the maximum bending moment generated in the thimble rod is reduced as compared with the case where the thimble rod is arranged in the vertical orientation, the bending moment is generated in the thimble rod. In addition, the direction and magnitude of the bending moment that occurs in the thimble rod each time the car moves up and down fluctuates, and the durability of the thimble rod is still a concern.

  The present invention has been made in view of the above problems, and by making the thimble rod swingable in accordance with a change in its pulling direction, an elevator wrapping member that reduces the bending moment generated in the thimble rod is further reduced. The object is to provide a terminal support structure.

  According to the first aspect of the present invention, a thimble rod connected to one end of a cord-like or belt-like winding member is inserted through the insertion hole of the retaining member, and the retaining member and the catching member are engaged in the pulling direction of the retaining member. Assuming that the locking member on the side of the thimble rod is a terminal support structure for an elevator winding member that sits on the seating surface of the holding member and holds the thimble rod, the locking member and the holding member are in spherical contact The thimble rod is swingable relative to the retaining member.

  In at least the invention described in claim 1, since the thimble rod is swingable with respect to the retaining member, when the towing direction of the thimble rod is inclined with respect to the longitudinal direction of the thimble rod, It will swing to point in the pulling direction.

  Specifically, as in the invention described in claim 2, a threaded portion is formed on the outer peripheral surface of the thimble rod, and a nut screwed into the threaded portion functions as a locking member. And

  In addition, as described in claim 3, one of the seating surface of the locking member and the seating surface of the retaining member is a convex spherical surface, and the other surface receives the one surface. A concave spherical surface is more desirable for improving the degree of freedom of the swing motion of the thimble rod.

  According to the first aspect of the present invention, when the pulling direction of the thimble rod is inclined with respect to the longitudinal direction of the thimble rod, the thimble rod swings so as to be directed in the pulling direction. The bending moment generated in the is greatly reduced, and the durability of the thimble rod is improved.

  FIG. 1 is a longitudinal sectional view schematically showing an elevator as a more specific embodiment of the present invention.

  As shown in FIG. 1, a machine room 2 is provided above the hoistway 1, a drive sheave 3 is installed in the machine room 2, and a winding member wound around the drive sheave 3. A car side end 4a of the main rope 4 is held by a support device 5 installed on the machine room floor 2a. On the other hand, the counter side end 4 b of the main rope 4 is held by a support device 6 fixed to the side wall 1 a of the hoistway 1.

  A car 7 is suspended from the main rope 4 between the drive sheave 3 and the support device 5 via a car suspension wheel 8, and between the drive sheave 3 and the support device 6 of the main rope 4. A counterweight 9 is suspended from the above-mentioned part via a counter suspension wheel 10, and a tension is always applied to the main rope 4 by the weights of the car 7 and the counterweight 9. The car 7 and the counterweight 9 run in the vertical direction by rotating the drive sheave 3 by a drive motor (not shown).

  Here, the position where the support device 5 holds the main rope 4 and the point A at which the main rope 4 starts to contact the car suspension 8 are offset on the projection plane orthogonal to the traveling direction of the car 7, that is, on the horizontal projection plane. is doing. That is, the car-side end portion 4a of the main rope 4 is inclined with an inclination angle θ with respect to the traveling direction of the car 7, and the inclination angle θ changes as the car 7 moves up and down. For example, when the car 7 rises, the inclination angle θ increases as shown by the phantom line in FIG.

  Similarly, the position where the support device 6 holds the main rope 4 and the point B at which the main rope 4 starts to contact the counter-suspension vehicle 10 are offset on the horizontal projection plane, and the counter side of the main rope 4 The end 4b is inclined with respect to the traveling direction of the counterweight 9, and the inclination angle changes as the counterweight 9 moves up and down.

  FIG. 2 is a cross-sectional view showing details of the support device 5. In FIG. 2A, the car side end 4a of the main rope 4 is drawn along the traveling direction of the car 7 for convenience, and the car side end 4a of the main rope 4 is shown in FIG. A state in which the car 7 is inclined with respect to the traveling direction is shown.

  A so-called wedge-type rope socket 11 is attached to the car-side end 4a of the main rope 4 as shown in FIG. 2A, and a thimble rod 12 is connected to the rope socket 11 with a pin (not shown). Has been.

  The support device 5 includes a pair of upper and lower spring seats 13 and 14, a compression coil spring 15 disposed between the spring seats 13 and 14, and a spherical seat 16 serving as a retaining member disposed on the upper spring seat 14. The lower spring seat 13 is backed up by the machine room floor 2a.

  Both the spring seats 13 and 14 and the spherical seat 16 are substantially disk-shaped, and insertion holes 13a, 14a and 16a are formed in the centers of the spring seats 13 and 14 and the spherical seat 16, respectively. The thimble rod 12 is inserted upward through the center of each of the spring seats 13, 14, the insertion holes 13 a, 14 a, 16 a of the spherical seat 16 and the compression coil spring 15. A spherical nut 17 serving as a locking member is screwed into a screw portion 12a formed on the outer peripheral surface of the side tip portion.

  The spherical nut 17 is in contact with the spherical seat 16 and the tension of the main rope 4 can be adjusted by rotating the spherical nut 17 and elastically deforming the compression coil spring 15. The spherical nut 17 is prevented from loosening by a lock nut 18 screwed into the threaded portion 12a of the thimble rod 12, and the insertion holes 13a, 14a, 16a of the spring seats 13, 14 and the spherical seat 16 are respectively provided. The diameter is larger than that of the thimble rod 12.

  That is, the spherical nut 17 has a relationship of catching with the spherical seat 16 in the pulling direction of the main rope 4, and the seat surface 17 a of the spherical nut 17 is seated on the seating surface 16 b of the spherical seat 16. The thimble rod 12 is held against the traction force pulled by the wheel 4.

  More specifically, the seat surface 17a of the spherical nut 17 is a convex spherical surface, while the seating surface 16b formed at the opening edge of the insertion hole 16a of the spherical seat 16 is the seat of the spherical nut 17. The surface 17a is a concave spherical surface, and the spherical nut 17 and the spherical seat 16 come into spherical contact with each other, so that the thimble rod 12 can swing with respect to the spherical seat 16 around the contact surface. ing.

  The support device 6 is configured in substantially the same manner as the support device 5, but the support device 6 is different from the support device 5 in that the spring seat 13 is fixed to the side wall 1 a of the hoistway 1.

  In the terminal support structure of the elevator wrapping member configured as described above, when the car 7 moves up and down, the inclination angle θ of the main rope 4 changes as shown in FIG. The pulling direction of the thimble rod 12 changes, and the thimble rod 12 is oscillated and displaced so as to be in a straight line with the main rope 4 with the spherical pair of the spherical nut 17 and the spherical seat 16.

  Therefore, according to the present embodiment, since the thimble rod 12 swings so as to be directed in the pulling direction, the bending moment generated in the thimble rod 12 is remarkably reduced, and the durability of the thimble rod 12 is greatly improved. There is an effect to.

  In addition, since a large-scale device is not required, there is a merit that is advantageous for space saving and cost reduction.

  In the present embodiment, the main rope 4 is used as the winding member, but it goes without saying that the present invention can be similarly applied even when a belt is used as the winding member.

  Further, as shown in FIG. 3 as a modification of the first embodiment, a substantially cylindrical cushioning rubber 21 is used in place of the compression coil spring 15 of the support device 5 in FIG. 2 and the shaft of the cushioning rubber 19 is used. It is also possible to arrange the thimble rod 12 at a position offset from the center to the outer peripheral side. 3A is a view showing a state in which no tension is applied to the main rope 4, and FIG. 3B is a view showing a state in which a tension is applied to the main rope 4. FIG. . 3 (a) and 3 (b), the car side end 4a of the main rope 4 is drawn along the traveling direction of the car 7 for convenience.

  In this modified example, as shown in FIG. 3A, the support device 22 in which the buffer rubber 21 is disposed between the pair of plates 19 and 20 is employed, and is offset from the shaft center of the buffer rubber 21 to the outer peripheral side. The thimble rod 12 is inserted through the position. Therefore, when tension is applied to the main rope 4, the cushion rubber 19 is elastically deformed and the upper surface thereof is inclined together with the spherical seat 16 as shown in FIG. Oscillating relatively, the main rope 4 and the thimble rod 12 are in a straight line, and substantially the same effect as in the first embodiment can be obtained.

  FIG. 4 is a cross-sectional view showing a terminal support structure of a compen- sion rope 23 that is a winding member that is stretched between the car 7 and the counterweight 9 in FIG. 1 as a second embodiment of the present invention. In FIG. 4 (a), the car side end portion 23a of the compen rope 23 is drawn along the traveling direction of the car 7 for convenience, and the car side end portion 23a of the compen rope 23 is shown in FIG. The state which inclined with respect to the running direction of the cage | basket | car 7 is shown.

  As shown in FIG. 1, the car-side end 23a of the compen- sion rope 23 is held by a car-side hitch plate 24 fixed to the lower beam 7a of the car 7, and the counter-side end 23b of the compen- sion rope 23 is a counter. It is held by a counter side hitch plate 25 fixed to the weight 9.

  A tension wheel 27 with a weight 26 is suspended at an intermediate portion of the compen- sion rope 23, and a predetermined tension is always applied to the compen- sion rope 23.

  Here, since the position where the car-side hitch plate 24 holds the compen- sion rope 23 and the point C at which the compen- sion rope 23 starts to contact the tensioning wheel 27 are offset on the horizontal projection plane, The end portion 23 a is inclined with respect to the traveling direction of the car 7, and the inclination angle changes as the car 7 moves up and down.

  As shown in FIG. 4A, the rope socket 11 is attached to the car-side end portion 23 a of the compen- sion rope 23 in the same manner as the car-side end portion 4 a of the main rope 4. The rod 12 is connected.

  The thimble rod 12 is secured to the car-side hitch plate 24 with a structure similar to that of the first embodiment, but the spherical seat 16 is directly disposed on the car-side hitch plate 24, so The difference is that no buffer member is interposed between the seat 16 and the car-side hitch plate 24. The counter side end 23b of the compen- sion rope 23 is also held in the same manner.

  Therefore, also in the second embodiment, when the car 7 moves up and down, the bending load generated on the thimble rod 12 is reduced by the rocking displacement of the thimble rod 12 in substantially the same manner as in the first embodiment. The same effect as in the embodiment can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows the outline of an elevator as the 1st Embodiment of this invention. It is sectional drawing which shows the detail of the support apparatus in FIG. 1, Comprising: The figure (a) is the figure drawn so that the cage | basket | car side edge part of a main rope may follow the running direction of a cage | basket, The figure (b) is the main rope. The figure which shows the state in which the cage | basket | car side edge part inclined with respect to the running direction of a cage | basket | car. It is a figure which shows the modification of 1st Embodiment, Comprising: The figure (a) is a figure which shows the state in which the tension | tensile_strength does not act on the main rope, The figure (b) shows the tension | tensile_strength acting on the main rope FIG. It is sectional drawing which shows the 2nd Embodiment of this invention, Comprising: The same figure (a) is the figure drawn so that the cage | basket | car side edge part of a compensation rope may run along the running direction of a cage | basket, The same figure (b) is a compensation. The figure which shows the state in which the cage | basket | car side edge part of the rope inclined with respect to the running direction of a cage | basket | car.

Explanation of symbols

4 ... Main rope (rolling member)
12 ... Thimble rod 16 ... Spherical seat (holding member)
17 ... Spherical nut (locking member)
23 ... Compen rope (winding member)

Claims (3)

A thimble rod connected to one end of a cord-like or belt-like winding member is inserted through the insertion hole of the retaining member, and the thimble rod side is locked in the pulling direction of the retaining member. A terminal support structure for a winding member of an elevator that a member sits on a seating surface of a retaining member and retains a thimble rod,
A terminal support structure for a winding member of an elevator, wherein the locking member and the retaining member are in spherical contact with each other, and the thimble rod is swingable with respect to the retaining member.   The elevator winding member according to claim 1, wherein a thread portion is formed on an outer peripheral surface of the thimble rod, and a nut screwed into the thread portion functions as a locking member. Terminal support structure.   One of the seating surface of the locking member and the seating surface of the retaining member is a convex spherical surface, and the other surface is a concave spherical surface that receives the one surface. The terminal support structure of the winding member of the elevator of Claim 1 or 2.

Images