Thimble rod and wire fastening device

Abstract

To introduce tension in the axial direction of a thimble rod to a connection part between a grip part of the thimble rod and a wire supporting an elevator car, when the thimble rod connected to the elevator car and the wire are fastened together in a state in which tension is applied to both of them.SOLUTION: A frame 2 is made up of parallel vertical frames 3, 3, an upper frame 4 erected between the upper portions of the vertical frames 3, 3 and having an insertion hole 4a through which a shaft 81 of the thimble rod 8 passes, a lower frame 5 erected between the lower portions of the vertical frames 3, 3, and an intermediate member 7 erected between the vertical frames 3, 3 at an intermediate position between the upper frame 4 and the lower frame 5 and having an insertion hole 7a through which a wire 9 passes to hold the wire 9. A nut 43 that screws onto the shaft 81 of the thimble rod 8 is placed around the insertion hole 4a of the upper frame 4. The centroid O of the joint portion of the upper frame 4 to the vertical frames 3, 3 is set within the size of the insertion hole 4a of the upper frame 4, and the centroid O' of the joint portion of the intermediate member 7 to the vertical frames 3, 3 is set within the size of the insertion hole 7a of the intermediate member 7.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a thimble rod and wire fastening device used for fastening a thimble rod connected to an elevator car and a wire supporting the elevator car together in a tensioned state. [Background technology]

[0002] The wires that support the elevator car are connected to a thimble rod (shackle rod) that is directly connected to the top of the car (see Patent Documents 1 to 4), so in order to connect the wires to the car, it is necessary to connect the wires to the thimble rod beforehand (see Patent Document 5).

[0003] In Patent Document 5, after the wire is inserted from below into the socket portion (grip portion) integrated into the wire side end of the thimble rod (paragraph 0020), the thimble rod and wire are each held using a frame-shaped fixing jig, and the thimble rod and wire are adjusted so that their axial direction and the axis of the wire are aligned on the same line, and then a joining filler material is filled into the socket portion (paragraphs 0062 to 0073).

[0004] In Patent Document 5, the shaft (rod) of the thimble rod is inserted directly into a rod receiver, and the height of the thimble rod relative to the wire can be adjusted by rotating nuts that screw onto the shaft at the upper and lower ends of the rod receiver (paragraphs 0064-0069).After adjusting the height of the thimble rod, the wire is connected to the thimble rod by filling the socket with a molten metal filler (paragraph 0072).

[0005] The tensile force acting on the wire supporting the elevator during use also acts on the connection between the thimble rod and the wire. Therefore, when connecting the wire and thimble rod, it is necessary to apply sufficient tensile force (tension) to the connection in advance so that the thimble rod and the wire do not displace relative to each other in the direction of the tensile force (axial direction) at the connection (see Patent Documents 6 and 7).

[0006] In Patent Document 6, while the wire is held by a holding device, a sliding body holding the socket portion (tip portion) of the thimble rod is pushed toward the shaft portion of the thimble rod with a bolt, thereby applying a tensile force to the connection portion. However, because there is eccentricity between the axis of the bolt and the axis of the wire, the efficiency of applying the tensile force is low, and there is also the drawback that unnecessary bending stress is generated in the sliding body due to the eccentricity.

[0007] In Patent Document 7, a tension introduction device (traction operation device) is connected to a rope gripping jig that holds the wire, and tension is applied to the wire by pulling the rope gripping jig toward the tension introduction device (paragraphs 0032 to 0035). However, when the rope gripping jig and the traction operation device are connected (Figs. 1 and 3), eccentricity occurs in the width direction of the traction operation device between the connection part between the backup link that holds the wire and the connecting link that is connected to the traction operation device, and the axis of the wire, so even in this example, there is inefficiency due to the eccentricity.

[0008] On the other hand, if the frame of Patent Document 5, which is used in an upright position on the floor, is used, it may be possible to apply tension in the axial direction of the thimble rod to the connection between the wire and the thimble rod.

[0009] However, in Patent Document 5, the axis of the shaft portion (rod portion) of the thimble rod is located on the widthwise side of the upper frame (beam) that constitutes the frame (fixed jig), and there is an eccentricity of about the diameter of the shaft portion between the widthwise center of the upper frame and the axis of the shaft portion of the thimble rod.

[0010] From this, it can be imagined that if tension is applied to the shaft of the thimble rod, a torsional moment corresponding to the eccentric distance will be generated in the upper frame due to the tension, and therefore it will be impossible to introduce tension into the thimble rod unless the upper frame has high torsional rigidity.

[0011] In Patent Document 5, in order to position the shaft of the thimble rod at a predetermined position on a plane, a rod receiver is inserted into a clamp integrated into one side of the upper frame in the width direction. Nuts are screwed around the thimble rod shaft at the top and bottom of this rod receiver, allowing the shaft to move up and down relative to the rod receiver (paragraphs 0063 to 0069). [Prior art documents] [Patent documents]

[0012] [Patent Document 1] JP 5-294584 A (paragraph 0010, Figure 1) [Patent Document 2] Japanese Patent Application Laid-Open No. 6-211461 (paragraph 0008, Figure 7) [Patent Document 3] Japanese Patent Application Laid-Open No. 10-129957 (Fig. 8) [Patent Document 4] JP 2012-121637 A (paragraph 0010, Figures 10 and 11) [Patent Document 5] JP 2017-197366 A (paragraphs 0015 to 0075, figures 1 to 6) [Patent Document 6] JP 2021-187560 A (paragraphs 0017 to 0037, Figures 1 to 4) [Patent Document 7] JP 2003-227084 A (paragraphs 0021 to 0036, Figures 1 to 6) Summary of the Invention [Problem to be solved by the invention]

[0013] As such, the frame (fixing jig) in Patent Document 5 is only capable of adjusting the axial position of the thimble rod shaft relative to the rod receiver (paragraphs 0063-0069), and therefore is unable to, and is not even intended to, apply axial tension to the thimble rod shaft. Since the rod receiver does not pass through the upper frame and is located outside the upper frame in the width direction, the frame itself, including the upper frame, is not designed to resist torsional moments.

[0014] If tension is applied to the shaft of the thimble rod in Patent Document 5, a vertically downward load parallel to the axial direction of the shaft acts on the rod receiver and clamp as described above, and this load causes a torsional moment to act around the axis (centre) of the upper frame, which the upper frame cannot resist and is unable to fully support the thimble rod. The torsional moment also acts around the axis of the rope receiver that is paired with the upper frame.

[0015] In view of the above background, the present invention proposes a frame-shaped fastening device capable of introducing tension in the axial direction of the thimble rod to the connection between the socket portion (grip portion) of the thimble rod and the wire. [Means for solving the problem]

[0016] The fastening device for a thimble rod and a wire according to claim 1 has a grip part connected to a wire supporting an elevator car, and a shaft part integrated with the grip part and having a male thread formed on the outer circumferential surface, and is used to fasten the grip part of a thimble rod connected to the car to the wire, The device comprises at least two vertical frames arranged in parallel with a distance in the horizontal direction, an upper frame that is installed between the upper parts of the two vertical frames located on both sides and joined to the two vertical frames, and has an insertion hole through which the shaft part of the thimble rod is inserted, a lower frame that is installed between the lower parts of the two vertical frames and joined to the two vertical frames, and an intermediate member that is installed between the vertical frames at a position intermediate the upper and lower frames and joined to the two vertical frames, has an insertion hole through which the wire is inserted, and holds the wire, a nut that threads onto the shaft portion of the thimble rod is disposed around the insertion hole of the upper frame; The constituent elements are that the centroid on the cross section of the joint portion of the upper frame to the vertical frame is within the size of the insertion hole of the upper frame, and that the centroid on the cross section of the joint portion of the intermediate material to the vertical frame is within the size of the insertion hole of the intermediate material.

[0017] "Connecting the grip portion of the thimble rod and the wire" refers to inserting the end portion (upper anchoring portion 91) of the wire 9 on the thimble rod 8 side into the grip portion 82 of the thimble rod 8 as shown in Figures 6-(a) and 6-(b), forming the end portion into an anchoring shape such as a loop shape that does not slip out of the grip portion 82, and connecting the thimble rod 8 and the wire 9 to each other in a state in which a tensile force has been applied (introduced) in advance in a direction that will separate the thimble rod 8 and the wire 9 from each other. The upper anchoring portion 91 of the wire 9 is provisionally attached to the grip portion 82 before tension is applied to the thimble rod 8, and is drawn to the inner side of the grip portion 82 (towards the intermediate material 7) as tension is applied to the thimble rod 8.

[0018] "At least two parallel vertical frames" means that three or more vertical frames 3 may be arranged between the upper frame 4 and the lower frame 5. When three or more vertical frames 3 are arranged, the vertical frames 3 other than those on both sides bear the reaction force of the tensile force acting in opposing directions on the upper frame 4 and the intermediate member 7 when tension is introduced into the thimble rods 8 as a compressive force. In this case, the vertical frames 3 other than those on both sides are arranged in positions that do not interfere with the arrangement (retention) of the thimble rods 8 and wires 9.

[0019] "An upper frame erected between the tops of two vertical frames located on both sides and joined to the two vertical frames" means that when there are three or more vertical frames 3, an upper frame 4 is erected between the tops of two vertical frames 3, 3 located on both sides and joined to both vertical frames 3, 3. The upper frame 4 is joined to the vertical frames 3, 3 on both sides, and together with the lower frame 5, forms a square frame (framework) 2.

[0020] "An upper frame having an insertion hole through which the shaft of a thimble rod is inserted" means that the upper frame 4 has an insertion hole 4a of a size (diameter) that allows the shaft 81 of the thimble rod 8 to be inserted, as shown in Figure 4, and also means that the upper frame 4 has a width greater than the size (diameter) of the shaft 81. "A lower frame that is installed between the lower parts of both vertical frames and joined to both vertical frames" means that the lower frame 5 that pairs with the upper frame 4 is installed between the lower parts of the vertical frames 3, 3, as shown in Figure 1, and forms a square frame 2 together with the upper frame 4. The insertion hole 4a of the upper frame 4 is not necessarily circular.

[0021] The term "an intermediate member that is installed between the vertical frames at a position midway between the upper and lower frames and joined to both vertical frames" refers to an intermediate member 7 that is installed between the vertical frames 3, 3 parallel to the upper frame 4 and the lower frame 5, as shown in FIG. 1, and joined to both, thereby constituting the frame 2 together with the upper frame 4 and the lower frame 5. The term "an intermediate member that has an insertion hole through which a wire passes and that holds the wire" refers to an intermediate member 7 that has an insertion hole 7a through which the wire 9 passes in the axial direction of the thimble rod 8, and that can hold the wire 9 when the wire 9 is inserted through the insertion hole 7a. The intermediate member 7 has a width greater than the size (diameter) of the wire 9. The insertion hole 7a of the intermediate member 7 is not necessarily circular.

[0022] Specifically, the intermediate member 7 comprises, for example, a middle remnant 71 that is installed between and joined to the vertical frames 3, 3, and two (two) clamping members 72, 72 that are separate from each other and can clamp the wire 9 (Claim 3). The intermediate member 7 is joined to the vertical frame 3 at both axial ends of the middle remnant 71. The two clamping members 72, 72 are separated from each other in the thickness direction of the middle remnant 71 so that they can clamp the wire 9 from both horizontal sides, and are connected to each other by two bolts 74, 74 that adjust the distance between the opposing surfaces of the two, with the clamping member 72 on the middle remnant 71 side being joined to the middle remnant 71 by the bolts 74 (Claim 3).

[0023] 1-(b) and 3, bolts 74, 74 are inserted or screwed into the middle remnant 71 and one of the clamping members 72 located on that side, joining one of the clamping members 72 to the middle remnant 71. The bolts 74, 74 are inserted into the other clamping member 72 located on the opposite side of the middle remnant 71 and screwed into nuts 75 located on the surface side of the other clamping member 72, thereby connecting the other clamping member 72 so that it can move relatively in the opposing direction of the one clamping member 72. Recesses 72a are formed on the opposing surfaces of the one clamping member 72 and the other clamping member 72, and the recesses 72a, 72a of both are opposed to each other and form a pair, thereby forming an insertion hole 7a.

[0024] With the other clamping member 72 spaced apart from or separated from the one clamping member 72, the wire 9 is inserted into the insertion hole 7a of the intermediate member 7 or inserted into the recess 72a of one clamping member 72. In the latter case, after the wire 9 is inserted into the recess 72a of one clamping member 72, the other clamping member 72 faces the one clamping member 72 and clamps the wire 9. The wire 9 is sandwiched between the recesses 72a, 72a of both clamping members 72, 72, and is inserted into the insertion hole 7a.

[0025] After the wire 9 is placed in the insertion hole 7a, the other clamping member 72 moves toward the one clamping member 72 by tightening the nut 75 onto the bolt 74, thereby restraining and holding the wire 9. The restraining force (compression force) exerted on the wire 9 by both clamping members 72, 72 at this time is large enough to resist the tension applied to the shaft portion 81 of the thimble rod 8 when the nut 43 attached to the upper frame 4 is fastened to the shaft portion 81.

[0026] The phrase "a nut that screws onto the shaft portion of the thimble rod is arranged around the insertion hole of the upper frame" means that a nut 43 that screws onto the male thread formed on the outer peripheral surface of the shaft portion 81 when the shaft portion 81 of the thimble rod 8 is inserted into the insertion hole 4a is arranged around the insertion hole 4a of the upper frame 4. The nut 43 is a component of the binding device 1, but is temporarily absent when the shaft portion 81 of the thimble rod 8 is inserted into the insertion hole 4a.

[0027] The nut 43 of the upper frame 4 is threaded onto the shaft portion 81 of the thimble rod 8, and as the amount of threading (screwed into) the shaft portion 81 increases, the shaft portion 81 moves upward or extends relative to the upper frame 4, and tension is applied (introduced) to the shaft portion 81. If the male thread formed on the shaft portion 81 is a right-handed thread, tension is applied to the shaft portion 81 when the nut 43 is rotated clockwise relative to the direction of threading (advancement) (vertically downward) as shown in Figures 5-(b) and 6-(b). The tension is released when the nut 43 is rotated counterclockwise. Tension is applied to the shaft portion 81 by rotating the nut 43 when the upper anchoring portion 91 of the wire 9 is temporarily attached to the grip portion 82 of the thimble rod 8 and the wire 9 is restrained by the intermediate member 7 (clamping members 72, 72).

[0028] The "joint portion of the upper frame to the vertical frame" refers to the portion of the entire upper frame 4 that is joined to the vertical frame 3 by welding, bolting, etc. When the upper frame 4 is made of angle steel as shown in Figure 1, if only the flange 41 of the plate element that faces horizontally when the frame 2 is in use is welded to the inner surface (projection piece 31 (inner projection surface)) of the vertical frame 3, the end surface of the flange 41 that is perpendicular to the material axis is the "joint portion to the vertical frame."

[0029] When the flange 41 and the web 42 of the vertically oriented plate element are welded to the inner peripheral surface of the vertical frame 3, the end face perpendicular to the material axis of the entire upper frame 4 is the "joint part to the vertical frame." The same applies to other shaped steel beams such as channel steel and H-shaped steel. "The usage state of the frame 2" refers to the usage state of the fastening device 1. The frame 2 (fastening device 1) is basically used with the axial direction of the vertical frame 3 facing vertically, but the vertical direction is not necessarily strict. In addition to steel, aluminum alloy profiles and other materials are also used for the upper frame 4, vertical frame 3, lower frame 5, and intermediate member 7.

[0030] When the upper frame 4 is an angle iron, a channel iron, or a similarly shaped shaped member, and the flange 41 is the "joint to the vertical frame," the "centroid on the cross section of the joint" refers to the centroid O on the cross section perpendicular to the material axis (axial line) of the flange 41, and when the entire upper frame 4 is the "joint to the vertical frame," the "centroid on the cross section of the joint" refers to the centroid O on the cross section perpendicular to the material axis of the entire upper frame 4. The upper frame 4 is not necessarily joined to the inner peripheral surface of the vertical frame 3, but may also be joined to the top end surface of the vertical frame 3, in which case the entire upper frame 4 becomes the "joint to the vertical frame."

[0031] When the flange 41 is the "joint to the vertical frame," if the insertion hole 4a is formed centered on the center of the width of the upper frame 4 as shown in the upper part of Figure 7, the insertion hole 4a is formed in the flange 41. Therefore, in terms of the state in which the frame 2 is in use, on a cross section of the upper frame 4 viewed in the axial direction, a straight line (vertical line) passing through the center of the insertion hole 4a passes through the axis L1 passing through the centroid (center) O on the cross section of the flange 41, and the center of the insertion hole 4a and the centroid of the flange O are located in the same vertical plane.

[0032] When the entire upper frame 4 is the "joint portion to the vertical frame," as shown in the upper part of Figure 3, the centroid O of the cross section of the entire upper frame 4 is located closer to the web 42 than the centroid O of the cross section of the joint portion of the flange 41 to the vertical frame 3, as shown in the upper part of Figure 7. For this reason, the centroid O of the cross section of the upper frame 4 and the center of the insertion hole 4a are no longer located in the same vertical plane. Also, for example, if the center of the insertion hole 4a coincides with the center of the width of the upper frame 4, the centroid O of the cross section of the joint portion of the upper frame 4 to the vertical frame 3 may not fall within the range of the size (diameter) of the insertion hole 4a.

[0033] However, if the center of the insertion hole 4a is positioned closer to the web 42 than the center of the width of the upper frame 4, as shown in the upper part of Figure 3, the centroid O on the cross section of the upper frame 4 can be kept within the size of the insertion hole 4a. "Fitted within the size (diameter) of the insertion hole" means that when the upper frame 4 is viewed in the axial direction, the centroid O on the cross section of the joint part of the upper frame 4 to the vertical frame 3 is located within the range of the size (diameter) of the insertion hole 4a.

[0034] When the centroid O on the cross section of the flange 41 (the joint part to the vertical frame 3) and the center of the insertion hole 4a are located in the same vertical plane, no eccentricity occurs between the centroid O of the flange 41 and the vertical downward load acting on the upper frame 4 due to the tension applied to the shaft 81 of the thimble rod 8 inserted into the insertion hole 4a of the upper frame 4, and therefore no torsional moment due to the tension applied to the thimble rod 8 acts on the upper frame 4.

[0035] When the entire upper frame 4 is joined to the vertical frame 3, if the "centre O on the cross section of the joint to the vertical frame" and the centre of the insertion hole 4a are not in the same vertical plane, eccentricity will occur between the centre O of the entire upper frame 4 and the centre of the insertion hole 4a, causing a torsional moment to act on the upper frame 4. However, by fitting the centre O of the entire upper frame 4 (the joint to the vertical frame 3) within the size (diameter) of the insertion hole 4a, the torsional moment acting on the upper frame 4 can be kept low.

[0036] Specifically, as shown in the upper part of Figure 3, the eccentricity distance e is the horizontal distance between the centroid O of the entire upper frame 4 when the frame 2 is in use and the center of the insertion hole 4a, indicated by the vertical dashed line. In the example of Patent Document 5, the eccentricity distance is half the distance obtained by adding the width of the vertical frame and the diameter of the rod holder. In contrast, in the present invention, even if the centroid O of the entire upper frame 4 and the center of the insertion hole 4a are not located in the same vertical plane, the eccentricity distance e is less than half (1 / 4) of half the width of the upper frame in Patent Document 5, and is less than half the diameter of the rod holder. Therefore, the torsional moment acting on the upper frame 4 is kept to less than 1 / 4 of that in Patent Document 5.

[0037] Furthermore, if a symmetrical steel or section such as a channel steel or H-shaped steel is used as the upper frame 4, and the entire upper frame 4 is joined to the inner surface of the vertical frame 3 in a symmetrical manner with respect to the axis of the vertical frame 3, when the insertion hole 4a is formed centered on the center of the width of the upper frame 4, no eccentricity will occur between the centroid O on the cross section of the upper frame 4 and the center of the insertion hole 4a.

[0038] The same applies to the method of joining the intermediate member 7 to the vertical frame 3 as to the joining of the upper frame 4 to the vertical frame 3. For example, if the axial end (end face) 71a of the intermediate member 7 overlaps the inner peripheral surface (the projection piece 31 (inner projection surface)) of the vertical frame 3 as shown in Figure 1 and is joined with a single bolt 73, as shown in Figures 3 and 7, if the axis of the bolt 73 and the center of the insertion hole 7a of the intermediate member 7 are located in the same vertical plane on a cross section of the intermediate member 7 viewed in the axial direction, then the centroid O' on the cross section of the joint portion of the intermediate member 7 to the vertical frame 3 and the center of the insertion hole 7a of the intermediate member 7 will be located in the same vertical plane, and there will be no eccentricity. The same applies when the entire end 71a of the intermediate member 7 is welded to the vertical frame 3. A line (vertical line) passing through the center of the insertion hole 7a passes through the axis L2 passing through the centroid O'.

[0039] In these cases, there is no eccentricity between the centroid O' on the cross section of the joint portion of the intermediate material 7 to the vertical frame 3 and the center of the insertion hole 7a, so no torsional moment acts on the intermediate material 7 due to the vertical upward load caused by the tensile force generated in the wire 9 when tension is applied to the thimble rod 8. Even if there is eccentricity between the centroid O' on the cross section of the intermediate material 7 and the center of the insertion hole 7a, as long as the centroid O' of the intermediate material 7 is within the size (diameter) of the insertion hole 7a of the intermediate material 7, the eccentricity distance can be small, just like when the upper frame 4 is joined to the vertical frame 3, so the torsional moment acting on the intermediate material 7 is kept low, and the same can be said for the upper frame 4 described above.

[0040] In the case of the intermediate member 7, the "joint portion of the intermediate member to the vertical frame" also refers to the portion of the entire intermediate member 7 that is joined to the vertical frame 3 by bolts 73, welding, etc. As shown in Figure 2-(b), when the intermediate member 7 consists of an end portion 71a that overlaps the inner surface of the vertical frame 3 and a middle portion 71b that is located between both end portions 71a and one side of 71a in the width direction, if the end portion 71a is joined to the vertical frame 3 by bolts 73, the "joint portion to the vertical frame" refers to the end portion 71a. The centroid O' is the center of the end portion 71a on a cross section of the intermediate member 7 viewed in the axial direction.

[0041] When the end 71a of the intermediate member 7 is joined to the vertical frame 3 with one bolt 73, the center of the bolt 73 coincides with the centroid (center) O' of the end 71a so that the intermediate member 7 does not rotate around its axis due to the tensile force introduced into the wire 9 inserted through the insertion hole 7a of the intermediate member 7 when tension is applied to the thimble rod 8. When the end 71a is joined to the vertical frame 3 with two or more bolts or by welding, etc., this restriction does not apply.

[0042] As shown in the lower part of Figure 3, if the centroid O' of the end 71a and the center of the insertion hole 7a of the intermediate member 7 are located in the same vertical plane, no torsional moment acts on the end 71a, nor on the intermediate member 7. Even if the end 71a of the intermediate member 7 is joined to the vertical frame 3 at a position away from the centroid O' by means other than a single bolt 73, the torsional moment acting on the end 71a of the intermediate member 7 can be kept low as long as the centroid O' of the joint is within the size (diameter) of the insertion hole 7a of the intermediate member 7.

[0043] As described above, the centroid O on the cross section of the joint portion of the upper frame 4 to the vertical frame 3 falls within the size (diameter) of the insertion hole 4a of the upper frame 4, and the centroid O' on the cross section of the joint portion of the intermediate material 7 to the vertical frame 3 falls within the size (diameter) of the insertion hole 7a of the intermediate material 7.

[0044] For these reasons, when the frame 2 is in use, on a cross section of the upper frame 4 and intermediate member 7 viewed in the axial direction, no eccentricity occurs between the centroids O, O' of the upper frame 4 and intermediate member 7 and the centers of the respective insertion holes 4a, 7a, or the eccentricity distance can be set to be less than 1 / 4 of the width of the upper frame 4 and intermediate member 7. As a result, no torsional moment acts on the upper frame 4 and intermediate member 7, or if one does act, it is possible to keep the torsional moment significantly lower than in Patent Document 5.

[0045] The web 42, which is a plate element facing the vertical direction of the upper frame 4, corresponds to "a stiffener having a surface parallel to the axial direction of the thimble rod, which serves as a resistance element against the tensile force acting in the axial direction of the thimble rod" (claim 2). The "resistance element against tensile force" refers to a resistance element against the bending moment that occurs vertically downward in the upper frame 4 due to the burden of tension as tension is applied to the shaft portion 81 of the thimble rod 8 inserted through the insertion hole 4a of the upper frame 4 when the frame 2 is in use.

[0046] If the stiffener (web 42) is joined to the vertical frame 3 together with the flange 41 by welding or the like, the entire upper frame 4 will be rigidly joined to the vertical frame 3, and the stiffener will be effective in functioning as a resistance element against tensile forces. However, even if the stiffener is not joined to the vertical frame 3, it can resist bending moments generated in the flange 41 of the upper frame 4, so it does not necessarily have to be joined to the vertical frame 3.

[0047] In order to avoid the application of eccentric load to the shaft 81 and wire 9 due to tension applied by rotation of the nut 43 to the shaft 81 of the thimble rod 8 while the intermediate member 7 holds the wire 9 connected to the grip portion 82 of the thimble rod 8, the center of the insertion hole 4a of the upper frame 4 and the center of the insertion hole 7a of the intermediate member 7 are adjusted to be positioned on the same vertical line, as shown in Figures 3 and 7. In Figures 3 and 7, the vertical dashed line indicates the line passing through the centers of the insertion holes 4a, 7a.

[0048] This means that when the frame 2 (fastening device 1) is in use, as shown in Figures 3 and 7, the center of the insertion hole 4a of the upper frame 4 and the center of the insertion hole 7a of the intermediate material 7 are located on the same vertical line indicated by the dotted line, and the center on the cross section of the shaft portion 81 of the thimble rod 8 inserted through the insertion hole 4a of the upper frame 4 coincides with the center on the cross section of the wire 9 inserted through the insertion hole 7a of the intermediate material 7. [Effects of the Invention]

[0049] Because the centroid on the cross section of the joint between the upper frame and the vertical frame fits within the size (diameter) of the insertion hole in the upper frame, and the centroid on the cross section of the joint between the intermediate member and the vertical frame fits within the size (diameter) of the insertion hole in the intermediate member, when the frame is in use, there is no eccentricity between the centroids of the upper frame and the intermediate member and the center of their respective insertion holes on the cross section when the upper frame and the intermediate member are viewed axially, or the eccentricity distance can be kept to less than 1 / 4 of the width of the upper frame and the intermediate member.As a result, no torsional moment acts on the upper frame and the intermediate member, or if it does act, it can be kept significantly low. [Brief explanation of the drawings]

[0050] [Figure 1] 2-(a) is a longitudinal cross-sectional view passing through an insertion hole showing an example of the formation of a frame constituting the binding device, and is a cross-sectional view taken along line xx in FIG. 2-(a), and FIG. 2-(b) is a cross-sectional view taken along line yy in FIG. 2-(a). [Figure 2] 1-(a) is a view taken along the line aa in FIG. 1-(a), (b) is a plan view of the intermediate material portion in FIG. 1-(b), and (c) is a rear view of (b). [Figure 3]FIG. 1B is an enlarged view of the upper frame portion and the intermediate member portion when the insertion hole of the vertical frame in FIG. 1B is formed in the shape of an elongated hole. [Figure 4] (a) is an oblique view showing the state in which the shaft portion of the thimble rod is not inserted into the insertion hole formed in the upper frame of the frame, and (b) is an oblique view showing the state in which a nut is screwed onto the shaft portion of the thimble rod inserted into the insertion hole of (a). [Figure 5] (a) is an elevational view showing the thimble rod supported on the upper frame, and (b) is an elevational view showing the wire connected to the grip part of the thimble rod in (a). [Figure 6] (a) is an oblique view showing the state in which a wire is inserted through the grip portion of the thimble rod, and (b) is an oblique view showing the state in which a nut threaded onto the shaft portion of the thimble rod from above the upper frame is rotated to apply tension to the shaft portion. [Figure 7] This is an oblique view showing that the center of the insertion hole of the upper frame is located on the upper frame axis passing through the centroid on the cross section of the joint part of the upper frame to the vertical frame, and that the center of the insertion hole of the intermediate material is located on the intermediate material axis passing through the centroid on the cross section of the joint part of the intermediate material to the vertical frame. DETAILED DESCRIPTION OF THE INVENTION

[0051] Figure 1 shows an example of a frame 2 that constitutes a fastening device 1 used to fasten the grip part 82 of the thimble rod 8 shown in Figure 5-(a) to the wire 9 that supports the elevator car and that has a grip part 82 connected to the wire 9 shown in Figure 5-(b) and a shaft part 81 that is integrated with the upper part of the grip part 82 and has a male thread formed on the outer periphery. The thimble rod 8 is connected to the car.

[0052] As shown in Figure 1-(a), the frame 2 comprises at least two vertical frames 3, 3 arranged in parallel with a horizontal distance between them, an upper frame 4 erected between the upper parts of the two vertical frames 3, 3 located on both sides, a lower frame 5 erected between the lower parts of the vertical frames 3, 3, and an intermediate member 7 erected between the vertical frames 3, 3 at a position midway between the upper frame 4 and the lower frame 5. The upper frame 4, the lower frame 5, and the intermediate member 7 are joined to the vertical frames 3, 3 at both axial ends to form the frame 2. The joints can be pin joints or rigid joints. Support bases 6, 6 such as base plates are joined to the undersides of the vertical frames 3, 3 to ensure stability when the frame 2 is in use (upright).

[0053] As shown in Figures 1, 4, etc., the upper frame 4 has at least a flange (projection piece) 41 facing in the thickness direction of the frame 2 (projection direction of the vertical frame 3), and may also have a web 42 (projection piece) as a stiffener, which is a plate element with a surface parallel to the axial direction of the thimble rod 8. The web 42 (stiffener) serves as a resistance element against the tensile force acting in the axial direction of the thimble rod 8, and resists the bending moment caused by the tensile force of the reaction force acting vertically downward from the shaft 81 of the thimble rod 8 to which tension is applied to the upper frame 4. If the upper frame 4 is made of structural steel, in addition to angle steel as shown in Figure 1, channel steel, H-shaped steel, etc. may also be used as the form in which the web 42 is provided.

[0054] As shown in Figures 1 and 2-(a), an insertion hole 4a through which the shaft portion 81 of the thimble rod 8 is inserted is formed within the width dimension of the flange 41, and as shown in Figures 4-(b), 5-(a) and (b), a nut 43 that screws onto the shaft portion 81 of the thimble rod 8 is disposed around the insertion hole 4a on the flange 41. The planar shape of the insertion hole 4a is not limited to a circle.

[0055] The nut 43 is placed around the insertion hole 4a on the flange 41 after the shaft portion 81 of the thimble rod 8 has been inserted through the insertion hole 4a from below, and is threaded onto the male thread formed on the surface of the shaft portion 81. The more the nut 43 is threaded into the shaft portion 81 (the deeper it is threaded (the greater the amount of threading)), the more tension is applied (introduced) to the shaft portion 81. The insertion hole 4a in the upper frame 4 is formed in one or more locations in the axial direction of the flange 41. In the drawing, the insertion holes 4a are formed in three locations so that tension can be applied to multiple thimble rods 8 in sequence.

[0056] The examples shown in Figures 1 and 3 show a case where angle iron or an angle-shaped aluminum alloy shaped member is used for the upper frame 4, and both the horizontally oriented flange 41 and the vertically oriented web 42 are welded to the projection piece 31 on the side of the adjacent vertical frame 3. The centroid O on the cross section of the joint portion of the upper frame 4 to the vertical frames 3, 3 is set to fit within the size (diameter) of the insertion hole 4a in the upper frame 4, as shown in Figures 3 and 7. The centroid O' on the cross section of the joint portion of the intermediate member 7 to the vertical frames 3, 3 is also set to fit within the size (diameter) of the insertion hole 7a in the intermediate member 7, as shown in Figures 3 and 7.

[0057] The upper part of Figure 7 shows an example in which the center of the insertion hole 4a of the upper frame 4 is located on a straight line (axis L1) that passes through the centroid O on the cross section of the joint portion of the upper frame 4 to the vertical frame 3 and is parallel to the axial direction of the upper frame 4, while the lower part shows an example in which the center of the insertion hole 7a of the intermediate member 7 is located on a straight line (axis L2) that passes through the centroid O' on the cross section of the joint portion of the intermediate member 7 to the vertical frame 3 and is parallel to the axial direction of the intermediate member 7. The upper part of Figure 7 shows an example in which the axial end face of the flange 41 of the upper frame 4 is welded to the projection piece 31 of the vertical frame 3 around the periphery or over the entire surface.

[0058] In the example shown in Figure 7, the axis L1 of the upper frame 4, which passes through the centroid O on the cross section of the joint portion of the upper frame 4 to the vertical frame 3, is located in a vertical plane passing through the center of the insertion hole 4a of the upper frame 4, and the axis L1 intersects with the center of the insertion hole 4a. In this case, there is no eccentricity between the axis of the thimble rod 8 and the axis L1 of the upper frame 4, so no torsional moment acts on the upper frame 4 due to the tensile force acting on the upper frame 4 from the thimble rod 8. The same applies when the axial end face is welded when the upper frame 4 has a closed cross-sectional shape.

[0059] In the case where the upper frame 4 is an angle iron having a flange 41 and a web 42, and the flange 41 and the web 42 are welded to the recessed piece 31 of the vertical frame 3 as shown in Figure 1, the centroid O on the cross section of the joint part of the upper frame 4 to the vertical frame 3 is located closer to the web 42 than the center of the flange 41 in the width direction, as shown in the upper part of Figure 3. However, by positioning the center of the insertion hole 4a formed in the flange 41 closer to the web 42 in the width direction of the flange 41, the centroid O of the upper frame 4 can be kept within the size (range) of the insertion hole 4a of the upper frame 4.

[0060] Specifically, for example, if the upper frame 4 is L-65 x 65 x 6, the centroid O is located 18.1 mm from the surface of the web 42 toward the flange 41, as shown in Figure 3. If the diameter of the insertion hole 4a is 25 mm and the center of the insertion hole 4a is located 30 mm from the surface of the web 42 toward the flange 41, the distance from the center of the insertion hole 4a to the centroid O (eccentricity distance e) is 11.9 mm. In Figure 3, the vertical dashed dotted line indicates the position of the center of the insertion hole 4a.

[0061] When viewed in a vertical cross section passing through the center of the insertion hole 4a, this eccentric distance e is less than 12.5 mm, which is the distance from the center of the insertion hole 4a to the inner surface of the insertion hole 4a, and the centroid O of the upper frame 4 is contained within the size of the insertion hole 4a of the upper frame 4. Furthermore, the width of the upper frame 4 is 65 mm, and 1 / 4 of the width of the upper frame 4 is 16.25 mm, so the eccentric distance e is less than 1 / 4 of the width of the upper frame 4, and is approximately 73% of 1 / 4 of the width of the upper frame 4.

[0062] The lower part of Figure 3 and the lower part of Figure 7 show an example in which the end parts 71a of the intermediate material 7, which overlap with the projection pieces 31 of the vertical frame 3 at both axial ends, are joined to the projection pieces 31 of the vertical frame 3 with bolts 73 placed at the centroid O' of the end parts 71a. In principle, the center of the bolts 73 coincides with the centroid O'.

[0063] 7, the axis L2 of the intermediate member 7 passing through the centroid O' of the intermediate member 7 is located in a vertical plane passing through the center of the insertion hole 7a, and the axis L2 intersects with the center of the insertion hole 7a. As a result, there is no eccentricity between the center of the cross section of the wire 9 and the axis L2 of the intermediate member 7, so no torsional moment due to the tension acting from the wire 9 acts on the intermediate member 7.

[0064] Regardless of whether axis L1 passing through centroid O of the upper frame 4 intersects with the center of insertion hole 4a of the upper frame 4 or whether axis L2 passing through centroid O' of the intermediate member 7 intersects with the center of insertion hole 7a of the intermediate member 7, the centers of the insertion holes 4a of the upper frame 4 and the centers of the insertion holes 7a of the intermediate member 7 are located on the same vertical line indicated by the dashed dotted line as shown in Figures 3 and 7. In other words, the center on the cross section of the shaft portion 81 of the thimble rod 8 inserted through the insertion hole 4a of the upper frame 4 coincides with the center on the cross section of the wire 9 inserted through the insertion hole 7a of the intermediate member 7, and no bending stress due to eccentricity is generated in the shaft portion 81 of the thimble rod 8 or the wire 9 when tension is applied to the thimble rod 8.

[0065] 1-(b) and 2-(b) to (d), the intermediate member 7 comprises a middle remnant 71 that is installed between and joined to the vertical frames 3, 3, and two or two clamping members 72, 72 that are separate from each other and can clamp the wire 9. The two clamping members 72, 72 are connected to each other with two bolts 74, 74 that adjust the distance between the opposing surfaces of the two clamping members, and the clamping member 72 on the middle remnant 71 side is joined to the middle remnant 71.

[0066] In the example shown, a bolt 73 facing the axial direction of the middle remainder 71 is used to join the middle remainder 71 to the vertical frame 3, so the middle remainder 71 is made up of three parts: end parts 71a, 71a that directly or indirectly overlap the projection pieces 31, 31 of the vertical frames 3, 3, and a middle part 71b located between one side of the width direction of the both end parts 71a, 71a, and clamping materials 72, 72 are arranged at three locations spaced apart in the axial direction (lengthwise direction) of the middle part 71b according to the number of insertion holes 4a of the upper frame 4 described above.

[0067] The end 71a is inserted into the insertion hole 3a formed in the projection piece 31 of the vertical frame 3 as shown in Figures 1-(b) and 3, and is connected by a bolt 73 or the like as shown in Figures 2-(b) and 2-(c). In the drawings, the center of the bolt 73 is aligned with the centroid O' of the end 71a. In Figure 2, the bolt 73 is integrated with the end 71a on the vertical frame 3 side, but it may be a separate piece.

[0068] The end 71a is joined to the vertical frame 3 by inserting the insertion hole 3a in the visible direction of the vertical frame 3 and threading a nut onto a bolt 73 protruding from the surface of the vertical frame 3, or by threading the bolt 73 into the insertion hole 3a. In the latter case, no nut is required. The insertion holes 3a are formed in multiple locations spaced apart in the axial direction of the vertical frame 3 as shown in FIG. 1-(b), or as elongated holes in the axial direction as shown in FIG. 3, so that the connection position between the grip portion 82 of the thimble rod 8 and the wire 9 can be adjusted in the vertical direction.

[0069] At each position of the clamping members 72 in the intermediate portion 71b of the remainder 71, two bolts 74 are arranged on either side of the insertion hole 7a in the axial direction of the intermediate portion 71. The bolts 74 are inserted or screwed into the intermediate portion 71b and the two clamping members 72, and nuts 75 are screwed onto the surface sides of the clamping members 72 located on the opposite side of the intermediate portion 71b, thereby joining the clamping member 72 on the opposite side of the intermediate portion 71b to the clamping member 72 on the intermediate portion 71b side. When a wire 9 is inserted into the insertion hole 7a, the wire 9 is clamped between the clamping members 72, and the wire 9 is restrained and held by the intermediate member 7.

[0070] Recesses 72a are formed on the opposing surfaces of the two paired clamping members 72, 72, and the recesses 72a are butted against each other to form an insertion hole 7a in the intermediate member 7. With the opposing surfaces of the clamping members 72, 72 separated and spaced apart, the upper part of the wire 9 is inserted into the insertion hole 7a from the lower side of the clamping member 72 as shown in Figure 6-(a). Alternatively, with the clamping member 72 on the opposite side of the intermediate portion 71b (middle remainder 71) detached from the clamping member 72 on the intermediate portion 71b side, the wire 9 is inserted into the recess 72a of the clamping member 72 on the intermediate portion 71b side from the surface side.

[0071] In the latter case, the wire 9 is inserted into the recess 72a of the clamping material 72 on the intermediate portion 71b side, and then the clamping material 72 on the opposite side of the intermediate portion 71b is butted against the clamping material 72 on the intermediate portion 71b side so as to sandwich the wire 9, and they are joined with a bolt 74. When the upper part of the wire 9 is inserted into the recess 72a of the clamping material 72 on the intermediate portion 71b side, it protrudes above the recess 72a. The planar shape of the insertion hole 7a is not limited to a circular shape. If the insertion hole 7a is circular, the planar shape of the recess 72a will be semicircular.

[0072] Before the wire 9 is inserted through the insertion hole 7a, a thimble rod 8 is installed between the insertion hole 4a of the upper frame 4 and the intermediate member 7, as shown in Figures 4-(b) and 5-(a). The thimble rod 8 has two parts: a shaft portion 81 that connects to the insertion hole 7a of the upper frame 4, and a grip portion 82 that has an opening 82a through which the wire 9 is inserted in the axial direction of the thimble rod 8 and to which the upper part of the wire 9 is connected. The upper section of the shaft portion 81 is formed with a male thread that screws into a nut 43 attached to the upper frame 4. The upper fixing portion 91, which is the upper part of the wire 9, is inserted from below through an insertion hole formed vertically in the grip portion 82 and is fixed to the grip portion 82 within the opening 82a that communicates with the insertion hole.

[0073] The upper part of the wire 9 (upper fixing part 91) is connected to the grip part 82 of the thimble rod 8 after being inserted through the insertion hole 7a of the intermediate material 7 from the lower side, or after being clamped between the recess 72a of the clamping material 72 on the middle part 71b side and the recess 72a of the clamping material 72 on the opposite side of the middle part 71b.

[0074] As shown in Figures 5-(a) and 6-(a), the shaft portion 81 of the thimble rod 8 is inserted from below into the insertion hole 4a of the upper frame 4, and a nut 43 is screwed onto the upper section of the shaft portion 81 protruding upward from the insertion hole 4a. The upper fixing portion 91 of the wire 9 is inserted through the insertion hole 7a of the intermediate member 7 and the insertion hole of the grip portion 82 of the thimble rod 8, and protruding into the opening 82a, and is bent into a loop shape or the like as shown in Figures 6-(a) and (b), and temporarily fixed in the insertion hole 82a.

[0075] Thereafter, bolts 74 or nuts 75 joining the clamping material 72 on the opposite side of the middle portion 71b (middle remainder 71) to the clamping material 72 on the middle portion 71b side are tightened, and the wire 9 is sandwiched and restrained between the clamping materials 72, 72.

[0076] The upper anchoring portion 91 of the wire 9 is temporarily fixed in the grip portion 82, and the portion below it that passes through the intermediate member 7 is clamped and restrained by the clamping members 72, 72. In this state, tension is applied (introduced) to the shaft portion 81 (thimble rod 8) by rotating the nut 43 that is threaded onto the shaft portion 81 of the thimble rod 8 as shown in FIG. 6-(b). If the male thread of the shaft portion 81 is a right-handed thread, tension is applied to the shaft portion 81 by rotating the nut 43 clockwise relative to the direction of threading (vertically downward). The tension to be applied to the shaft portion 81 is a set magnitude, but the tension to be applied may also be determined in advance based on the length of threading of the nut 43 onto the shaft portion 81.

[0077] As tension is applied to the shaft portion 81 by rotating the nut 43, the upper fixing portion 91 of the wire 9 is pulled toward the intermediate material 7 within the opening 82a of the grip portion 82 and engages downward with the grip portion 82, and tension is also applied to the section of the wire 9 from the intermediate material 7 (clamping materials 72, 72) to the grip portion 82.

[0078] In this state, molten metal is filled as a filler into the opening 82a of the grip portion 82, and the filler is hardened, thereby fixing the upper fixing portion 91 of the wire 9 in the opening 82a of the grip portion 82. When the upper fixing portion 91 of the wire 9 is fixed to the grip portion 82, the fastening operation of the thimble rod 8 and the wire 9 is completed. [Explanation of symbols]

[0079] 1...Tightening device, 2...frame, 3...vertical frame, 31...projection piece, 3a...insertion hole, 4... upper frame, 41... flange (protruding piece), 4a... insertion hole, 42... web (protruding piece), 43... nut, 5……Bottom frame, 6...Support stand, 7... intermediate material, 7a... insertion hole, 71... middle remainder, 71a... end portion, 71b... middle portion, 72... clamping material, 72a... recess, 73... bolt (for end portion 71a), 74... bolt (for clamping material 42), 75... nut, 8...thimble rod, 81...shaft portion, 82...grip portion, 82a...opening, 9...wire, 91...upper fixing part, O...Centroid of the cross section of the joint between the upper frame and the vertical frame, O'...Centroid of the cross section of the joint part of the intermediate material to the vertical frame, L1...Axis of the upper frame passing through the centroid O, L2...Axis of the intermediate material passing through the centroid O'.

Claims

1. A fastening device having a grip portion connected to a wire supporting an elevator car and a shaft portion integrated with the grip portion and having a male thread formed on the outer peripheral surface, the fastening device being used to fasten the grip portion of a thimble rod connected to the car to the wire, The device comprises at least two vertical frames arranged in parallel with a distance in the horizontal direction, an upper frame that is installed between the upper parts of the two vertical frames located on both sides and joined to the two vertical frames, and has an insertion hole through which the shaft part of the thimble rod is inserted, a lower frame that is installed between the lower parts of the two vertical frames and joined to the two vertical frames, and an intermediate member that is installed between the vertical frames at a position intermediate the upper and lower frames and joined to the two vertical frames, has an insertion hole through which the wire is inserted, and holds the wire, a nut that threads onto the shaft portion of the thimble rod is disposed around the insertion hole of the upper frame; A device for fastening a thimble rod and a wire, characterized in that the centroid of the cross section of the joint portion of the upper frame to the vertical frame is within the size of the insertion hole of the upper frame, and the centroid of the cross section of the joint portion of the intermediate material to the vertical frame is within the size of the insertion hole of the intermediate material.

2. 2. The device for fastening a thimble rod and a wire according to claim 1, wherein a stiffener, which is a plate element having a surface parallel to the axial direction of the thimble rod, is integrated with the upper frame.

3. The intermediate member comprises a middle section that is installed between the vertical frames and joined to both, and two clamping members that are separate from each other and can clamp the wire, and these two clamping members are connected to each other by two bolts that adjust the distance between the opposing surfaces of the two clamping members, while the clamping member on the middle section side is joined to the middle section.A device for fastening a thimble rod and a wire as described in claim 1 or claim 2, characterized in that the intermediate member comprises a middle section that is installed between the vertical frames and joined to both, and two clamping members that are separate from each other and can clamp the wire, and these two clamping members are connected to each other by two bolts that adjust the distance between the opposing surfaces of the two clamping members, and the clamping member on the middle section side is joined to the middle section.

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