JP5127680B2 - Fixing structure of male screw member - Google Patents

Description

  The present invention relates to a fixing structure for an externally threaded member on which an axial tension and a lateral load perpendicular thereto act.

  FIG. 2 is an overall schematic diagram of elevator parking. In this figure, 31 is a cage, 32 is a wire rope, 33 is a drum, 34 is a rope sheave, and 35 is a counterweight. The drum 33 is rotated by a motor 36 and a speed reducer 37, and the wire rope 32 wound around this is rotated. The cage 31 is lifted and lowered, and the counterweight 35 is lifted and lowered via the wire rope 32 in synchronization with the cage 31 to reduce the rotational load of the drum 33. In this figure, 38 is a pallet on which the vehicle is placed.

  In this drawing, for example, a position adjusting bolt 39 connected to the wire rope 32 is used at a place where the wire rope 32 is fixed to the counterweight 35. A lateral load acts on the position adjusting bolt 39 due to the tension of the wire rope 32 and the position fluctuation of the wire rope 32.

  A fixing structure of a male screw member on which a tension and a lateral load act is disclosed in Patent Document 1, for example.

  FIG. 3 is a schematic view of an elevator disclosed in Patent Document 1, FIG. 4 is an enlarged perspective view of a main part of FIG. 3, and FIG. 5 is an enlarged perspective view of a suspension rod.

  As shown in FIG. 5, nuts 42 are provided in two stages on the upper end side of the suspension rod 40. The suspension rod 40 is suspended and supported by the rod suspension member 41 by the two-stage nut 42. The reason why the nuts 42 are provided in two stages is to prevent loosening. Further, a split pin 43 is provided so that the nut 42 is not loosened and dropped off, thereby providing double safety.

  As shown in FIG. 4, the lower side of the suspension rod 40 is provided with a two-stage nut in the same manner as the upper side, and the main rope fixing base 53 is suspended from the suspension rod 40. Further, the main rope fixing base 53 is fixed to the guide rail 52 using a rail clip (not shown) or the like. Three main ropes 51 are suspended from the support arm 54 by a main rope suspension rod 44. The main rope suspension rod 44 is supported by the support arm 4 via a buffer member 45 formed by a spring spring or the like. A lock nut 46 is provided on the upper end side of the main rope suspension rod 44 so that the main rope suspension rod 44 cannot be removed from the support arm 54. The main rope suspension rod 44 and the main rope 51 are securely coupled by the fastener 47.

JP 2001-139260 A, “Elevator”

  As shown in FIG. 6, the position adjusting bolt 39 and the suspension rod 40 (hereinafter simply referred to as “male screw member 60”) are connected to the connection plate material 62 provided on the counterweight and the rod suspension member. There is a male screw portion around it, and the connecting plate 62 is clamped with nuts 64a, 64b, and 64c that are screwed together.

  However, a tension Ft of a wire rope, chain or the like (hereinafter referred to as “wire etc. 61”) connected thereto is applied to the male screw member 60, and at the same time, a lateral load Fr orthogonal thereto is repeatedly applied.

  In the conventional structure, since the bending moment acts on the connecting portion between the male screw member and the connecting plate due to the lateral load Fr, the bending stress repeatedly acts on a specific position of the male screw member, and this portion breaks due to fatigue failure. There was a fear.

  That is, in the conventional structure, the male screw portion of the male screw member has no degree of freedom in the male screw member, so that bending stress is received by the bending rigidity of the male screw member, and bending stress is generated on the surface of the male screw member. In addition, since the notch coefficient of the male thread portion is large, there is a possibility that fatigue cracks are generated with a small bending load, resulting in breakage.

  The present invention has been developed to solve the above-described problems. That is, the object of the present invention is to reliably connect the male screw member that receives axial tension to the coupling plate, to easily adjust the coupling position, and to apply a lateral load perpendicular to the tension repeatedly. However, an object of the present invention is to provide a male screw member fixing structure that can reliably prevent fatigue failure of the male screw member.

According to the present invention, an external thread member on which an axial tension and a lateral load perpendicular to the axial tension act,
A plate-like connecting plate material having a through hole for passing the male screw member;
A fixing nut to be screwed with the male screw member through the through hole;
A swing washer sandwiched between the connecting plate and the fixing nut and swingable in the direction of the lateral load ,
The swing washer includes an inner diameter through which the male screw member is passed, a rectangular flat plate portion larger than the through hole, and a line that protrudes integrally to the connecting plate member side of the rectangular flat plate portion and extends in a direction perpendicular to the lateral load. There is provided a fixing structure of a male screw member characterized by having a convex portion .

  According to the configuration of the present invention, the male screw member that receives axial tension is connected by passing the male screw member through the through hole of the connecting plate material and screwing the fixing nut into the male screw member that has passed through the through hole. It can be reliably connected to the plate material, and its connecting position can be easily adjusted.

  In addition, since a swing washer that can swing in the direction of the lateral load perpendicular to the tension is sandwiched between the connecting plate and the fixing nut, even if the lateral load repeatedly acts on the male screw member, The bending stress generated in the male screw member due to the swinging of the moving washer can be greatly reduced or eliminated, and the fatigue failure can be reliably prevented.

  The swing washer has a rectangular flat plate portion and a linear convex portion that protrudes integrally on the connecting plate member side and extends in a direction perpendicular to the lateral load, so that the lateral load is repeatedly applied to the male screw member. Even if it acts, it is possible to substantially eliminate bending stress generated in the male screw member by swinging the swing washer at the top of the linear convex portion, and to reliably prevent fatigue failure.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

FIG. 1 is an embodiment of a fixing structure of a male screw member according to the present invention, in which (A) is a side view and (B) is an arrow view taken along line BB in (A).
As shown in this figure, the male screw member fixing structure of the present invention comprises a male screw member 10, a connecting plate 12, a fixing nut 14, and a swing washer 16.

In this example, the male screw member 10 is a solid round bar having a male screw portion 10a on the outer periphery over the entire length. Further, in this example, the upper end of the male screw member 10 is connected to the wire rope 1 via the clasp 9. Note that the clasp 9 is not essential and may be omitted.
With this configuration, an axial tension Ft from the wire rope 1 acts on the male screw member 10, and a lateral load Fr perpendicular to the tension Ft caused by a change in the hanging point of the wire rope 1 or the like acts.

  In addition, this invention is not limited to the wire rope 1, A chain etc. may be sufficient. Further, the directions of the tension Ft and the lateral load Fr acting on the male screw member 10 are not limited to this example, and may be in the opposite direction or in other directions.

  Furthermore, a through hole 10b penetrating in the diameter direction is provided at the lower end of the male screw member 10. By inserting a not-shown split pin into the through hole 10b and bending the outer portion of the split pin shaft, it is possible to prevent the fixing nut 14 from coming off due to vibration or the like.

  The connecting plate 12 is a flat plate member extending in a direction orthogonal to the tension Ft, and has a through hole 12a through which the male screw member 10 is passed. The connecting plate 12 is provided integrally with a counterweight or a rod suspension member. The inner diameter of the through hole 12a is set to be, for example, 1 to 2 mm larger than the outer diameter of the male screw member 10 so that the male screw member 10 is passed through a gap.

In this example, the fixing nut 14 is a double nut including an upper nut 14a and a lower nut 14b, and is screwed into the male screw member 10 below the connecting plate 12 through the through hole 12a. As the fixing nut 14, a hard lock nut having a strong lock is used.
With this configuration, in a state in which a gap is opened between the upper nut 14a and the lower nut 14b, they can be rotated and freely moved along the male screw member 10, respectively. Further, the upper nut 14a and the lower nut 14b are rotated in the opposite directions to be brought into close contact with each other, whereby the frictional force between the female screw portion of each nut (the upper nut 14a and the lower nut 14b) and the male screw portion 10a of the male screw member 10 is obtained. It is possible to prevent loosening due to vibration or the like.
Note that the fixing nut 14 is not limited to a double nut, and when the wire rope 1 is more returned, a combination of a lock nut and a split pin may be used.

  In this figure, an installation nut 15 is also provided on the upper side of the connecting plate 12. This installation nut 15 is used for setting at the time of installation. In actual use, the installation nut 15 should be set so as not to prevent the oscillation of the oscillation washer 16 with a gap of 1 to 2 mm from the connecting plate 12. .

The swing washer 16 is sandwiched between the connecting plate member 12 and the fixing nut 14 (below the connecting plate member 12 in this example), and is configured to be swingable in the direction of the lateral load Fr.
In this example, the swing washer 16 includes a rectangular flat plate portion 16a and a linear convex portion 16b formed integrally therewith. The rectangular flat plate portion 16a has an inner diameter through which the male screw member 10 is passed and an outer diameter larger than the through hole 12a. Moreover, the linear convex part 16b protrudes integrally on the board | plate material side (upper side in this example) of the square flat plate part 16a, and is extended linearly in the direction orthogonal to the horizontal load Fr.
In this example, the top cross section of the linear protrusion 16b is an acute angle of about 90 degrees, but this angle may be 90 degrees or more as long as the swing washer 16 is allowed to swing. The top cross section may be an arc.

Further, when the wire rope 1 is twisted back, a rotational force around the axis is generated in the male screw member 10, and a rotational force acts on the swing washer 16 due to friction with the fixing nut 14. Since the swing washer 16 can swing only in the direction of the lateral load, it loses the effect that no bending stress acts upon rotation. Therefore, in order to fix the rotation of the swing washer 16, the shape is square (in this example, a quadrangle or other square is also possible), and the connection plate 12 is provided with a detent member 17 for the swing washer 16. Yes.
That is, in this example, the rotation preventing member 17 is fixed to the lower surface of the connecting plate 12 by welding or the like. Further, the rotation preventing member 17 is positioned in the vicinity of one of the sides of the rectangular flat plate portion 16a so that the rectangular flat plate portion 16a does not rotate around its axis.
In particular, the anti-rotation member 17 is arranged close to the side where the linear convex portion 16b is located among the sides of the rectangular flat plate portion 16a, so that no sound is generated.

  With the configuration of the above-described embodiment, even if a lateral load Fr is applied to the male screw member 10, the swing washer 16 swings around the top of the linear convex portion 16b of the swing washer 16, so the male screw member 10 Bending stress does not act on the material, bending stress generated in the male screw member can be substantially eliminated, and fatigue failure can be reliably prevented.

  In addition, this invention is not limited to embodiment mentioned above. That is, the scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

It is an embodiment figure of the fixation structure of the external thread member by this invention. It is the whole elevator parking schematic. It is the schematic of the elevator of patent document 1. It is an expansion perspective view of the principal part of FIG. It is an expansion perspective view of a hanging rod. It is a fixed structural view of a conventional male screw member.

Explanation of symbols

1 wire rope, 9 clasp,
10 male screw member, 10a male screw part, 10b through hole,
12 connecting plate material, 14 fixing nut,
14a upper nut, 14b lower nut,
15 Installation nut, 16 Swing washer,
16a square flat plate part, 16b linear convex part,
17 Detent member

Claims (1)

A male screw member on which an axial tension and a lateral load perpendicular thereto act;
A plate-like connecting plate material having a through hole for passing the male screw member;
A fixing nut to be screwed with the male screw member through the through hole;
A swing washer sandwiched between the connecting plate and the fixing nut and swingable in the direction of the lateral load ,
The swing washer includes an inner diameter through which the male screw member is passed, a rectangular flat plate portion larger than the through hole, and a line that protrudes integrally to the connecting plate member side of the rectangular flat plate portion and extends in a direction perpendicular to the lateral load. A male screw member fixing structure, comprising: a convex portion .

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