JPH0988921A - Terminal fittings for adjusting the length of the tension member in the structure - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a terminal member for adjusting the length of a tension member, which has a compact structure, fits well, and is smart in terms of design. A terminal fitting (1) for adjusting the length of a tension member (5) installed under tension in a structure in civil engineering or construction.
In addition, a threaded sleeve 2 having a male screw portion 7 on the outer periphery of the tip and fixed coaxially and integrally to the end of the tension member 5 and a female screw portion 8 which is tubular and is screwed to the male screw portion 7. The structure is such that an adjuster 3 having a male screw portion 9 of a reverse thread to the female screw portion 8 on the inner peripheral portion of the cylinder on the outer peripheral portion of the cylinder, and a female screw portion 10 screwed onto the male screw portion 9 of the adjuster 3 at one end It is composed of a clevis 4 having an engaging portion 11 fixed to the body at the other end and is used for a wire rope. An adjuster 3 having a cylindrical female threaded portion 8 which is screwed into the male threaded portion of the tension member 5 on the inner peripheral portion of the cylinder, and a male threaded portion 9 having a reverse thread to the female threaded portion 8 on the outer peripheral portion of the cylinder.
And a female screw portion 1 that is screwed into the male screw portion 9 of the adjuster 3.
It is composed of a clevis 4 having 0 at one end and an engaging portion 11 fixed to the structure at the other end, and is used for a rod such as a tie rod.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal fitting for adjusting the length of a tension member erected in a tensioned state in various structures constructed in the fields of civil engineering and construction, and particularly, The present invention relates to a suspending material for a bridge, a structural cable that is hung on a roof of a building or a glass curtain wall, and a terminal metal fitting used for adjusting a tensile length of a rod or the like.

[0002]

2. Description of the Related Art As an example in which tensile members such as structural cables and rods are laid on various structures constructed in the field of civil engineering and construction, glass with a glass curtain wall is attached to FIGS. 5 and 6. The structure of the ridge is shown. This structure is a type of large-scale building, part of which is a glass building 1.
6 are configured. The glass building 16 is constructed by including a cable truss 17 and a glass curtain wall 18 attached to the outer side surface of the cable truss 17, and is composed of a cable truss reinforced cable in order to hold the peripheral portion of the glass curtain wall 18 under tension. The tension member 5 is installed in a curved state in which tension is applied to the cable truss 17.

As described above, in order to tension the tension member 5 with proper tension, conventionally, between the end of the tension member 5 and the inner side of the body of the cable truss 17,
Terminal fitting for length adjustment 1 with a turnbuckle as an element member
9 was used. As shown in FIG. 7, the terminal fitting 19 includes a fork bolt 20 (which may be an eyebolt) which is formed by a male screw portion at the tip outer peripheral portion and is attached to the inside of the body by bolting, and a tip outer peripheral portion. From a threaded sleeve 2 formed on the male screw portion and coaxially integrally fixed to the end portion of the tension member 5, and a turnbuckle 21 screwed over both of the male screw portions abutted with each other. The turnbuckle 21 is rotated to adjust the distance between the abutting ends of the male screw parts to adjust the tension applied to the tension member 5.

[0004]

By the way, a cable or rod as a tensile member 5 used in civil engineering and building structures is often manufactured with a predetermined length and pin-joined to the inside of the body. . However, at this time, it is necessary to adjust the cable length or the rod length due to the processing error of the terminal and the manufacturing error of the body. Therefore, the terminal metal fitting 19 is an indispensable adjusting member. In the conventional terminal fitting 19, since the turnbuckle 21 is used, there is always a gap between the tips of both male screw parts, and the fitting length is correspondingly lengthened by the adjustment allowance. Since the thickness of the metal fitting becomes thicker at the portion and a large step is formed in terms of shape, there is a problem that not only does it lack a smart design due to its bulging shape, but also the fitting of the metal fitting is poor.

The present invention has been made in order to solve the above problems, and an object of the present invention is that it has a compact structure, fits well, and is smart in design. An object of the present invention is to provide a terminal fitting for adjusting the length of the tension member.

[0006]

The present invention has the following configuration to achieve the above object. That is, the present invention is directed to the terminal fitting 1 for adjusting the length of the tension member 5 that is installed under tension in a structure in civil engineering or construction.
In addition, the outer peripheral portion of the tip is formed in the male screw portion 7 and is coaxially integrally fixed to the end portion of the tension member 5 with the threaded sleeve 2, which is cylindrical and has a cylindrical shape. An adjuster 3 in which a female screw portion 8 to be screwed is formed on the inner peripheral portion of the cylinder, and a male screw portion 9 having a reverse thread to the female screw portion 8 is formed on the outer peripheral portion of the cylinder.
And a female screw portion 10 that is screwed into the male screw portion 9 of the adjuster 3 at one end portion, and an engaging portion 11 fixed to the structure.
Is a clevis 4 formed at the other end, respectively, and a terminal fitting for adjusting the length of the tension member in the structure.

The present invention is also a terminal fitting 1 for adjusting the length of a tension member 5 composed of a rod erected under tension in a structure in civil engineering or construction, and having a tubular shape. A female screw portion 8 that is screwed into a male screw portion formed at the tip portion of the rod is provided on the inner peripheral portion of the cylinder, and a male screw portion 9 having a reverse thread to the female screw portion 8
Adjusters 3 respectively formed on the outer peripheral portion of the cylinder, and a female screw portion 10 screwed onto the male screw portion 9 of the adjuster 3.
Is a clevis 4 formed at one end and an engaging portion 11 fixed to the structure at the other end, respectively.

According to the present invention, the adjuster 3 in the terminal fitting is formed with both the female screw portion 8 and the male screw portion 9 over a length of at least about 1/2 of the total length from the front end to the outer periphery of the rear end. The present invention is characterized in that an engaging portion for engaging a turning jig is formed in the portion, and in the present invention, the adjuster 3 is screwed with a set screw for preventing rotation in the terminal fitting. It is characterized in that it has a screw hole 14 in the outer peripheral portion of the rear end, and a screw hole 15 in the female screw portion 10 into which the clevis 4 is screw-inserted.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 showing one example thereof. A length-adjusting terminal fitting for wire rope (hereinafter referred to as terminal fitting) 1 according to the present invention includes a threaded sleeve 2, an adjuster 3, and a clevis 4. The terminal fitting 1 is a wire rope that is a tension member 5 that is erected on various structures constructed in the fields of civil engineering and construction, similar to the content described in the section [Prior Art]. Used as a member.

The threaded sleeve 2 is made of a metal, for example, steel, and has a cylindrical shape. A hole 6 for inserting an appropriate length of the end portion of the tension member 5 has an axial length from the rear end surface portion. Is bored along the center of the shaft, and a male thread is formed on the outer peripheral surface of the tip side portion that is a solid body, and the tip outer peripheral portion is formed on the male screw portion 7. . The threaded sleeve 2 includes a tension member 5 which is a wire rope.
The end portion of is pulled into the hole 6 and fixed by the crimping means, so that the end portion of the pulling member 5 is coaxially and integrally fixed.

The adjuster 3 is made of a metal, for example, a steel tubular body, and has a short tubular shape with an appropriate diameter that can be fitted into the male screw portion 7 of the threaded sleeve 2, and has a total length of about 1 from the tip portion.
A female screw is engraved on the inner peripheral surface of the front part over the length of / 2,
Male threads, which are the opposite of the female thread, are threaded on the outer peripheral surface to form a threaded cylinder.On the other hand, the rear section connected to this front section has threads on both the inner and outer peripheral surfaces. It is a straight cylinder having no flange and is formed into a flanged cylinder part having a flange part protruding on the outer peripheral part of the rear end.

The adjuster 3 having such a structure is
An inner peripheral portion of the threaded tubular portion is formed into a female threaded portion 8 that is screwed into the male threaded portion, and an outer peripheral portion of the barrel is a reverse thread to the female threaded portion 8 and a female threaded portion 10 of the clevis 4 described later. Is formed on the male threaded portion 9 that is screwed into the male threaded portion 9 and the straight tube portion of the flanged tubular portion has an inner diameter substantially equal to the diameter of the screw bottom of the female threaded portion 8 and an outer diameter of the male threaded portion 9. The diameter of the bottom is made substantially equal, and it is formed into a cylinder that can be loosely fitted to the threaded sleeve 2, and the collar portion is formed into a turning connection portion that engages a turning jig.

The clevis 4 is made of metal, and is formed as a connecting metal fitting having a U-link part in the front part and a round tube part in the rear part coaxially and integrally. Female threads of the screw are engraved, and holes 12 for inserting pins are formed in the mounting piece portions of the U-link portion which face each other in parallel. In the clevis 4 having such a structure, the round cylinder portion in which the female screw is engraved is the male screw portion 9 of the adjuster 3.
The U-link portion is formed on the female screw portion 10 that is screwed to the inside of the structure, and the U-link portion is formed on the engaging portion 11 that is fixed to the inside of the body of the cable truss 17 or the like in the structure by pin connection. In addition, it is preferable that the screw length of the female screw portion 10 is set to be approximately twice or more the screw length of the male screw portion 9 of the adjuster 3.

The tension member 5, for example, a wire rope, which is erected on the structure by the terminal fitting 1 having the above-described structure, is tensioned and stretched in the following manner. The threaded sleeve 2 is coaxially and integrally fixed to the end portion of the wire rope 5 by crimping, and then the adjuster 3 is screwed onto the threaded sleeve 2. that time,
The adjuster 3 is screwed in until the tip is flush with the tip of the threaded sleeve 2. Then, the clevis 4 is screwed into the adjuster 3 screwed into the threaded sleeve 2 to obtain the longest set state shown in FIG. 1 (B). After that, the clevis 4 is fixed to the inside of the body such as the cable truss 17 by pin connection. After this fixing, the adjuster 3 is turned by a turning jig or the like to adjust the length appropriately as in the example of the central set state of FIG. 1 (A) and the shortest set state of FIG. 1 (C). Note that the clevis 4 may be fixed to the inside of the body after the length adjustment. In this way, when the fixing of the clevis 4 and the adjustment of the length of the tension member 5 are completed,
By pulling the frame with another device such as a jack, a required tension is applied to the tension member 5, and the installation of the tension member 5 is completed.

When the adjuster 3 is further rotated, the threaded sleeve 2 and the adjuster 3 slide in the same direction (to the right in FIG. 1), and from the longest set state in FIG. 1 (B) to the center in FIG. 1 (A). It is possible to adjust the length by changing the length between the tip of the threaded sleeve 2 and the pin insertion hole 12 within the range from the set state to the shortest set state of FIG. 1 (C). . When the connection between the threaded sleeve 2 and the clevis 4 is released, it goes without saying that the adjuster 3 may be turned in the opposite direction and the operation opposite to the above operation may be performed.

In the adjuster 3, the screws on the inner and outer circumferences are always meshed at the same time, and the cross section in the direction orthogonal to the wire rope at this part (the AA cross section in FIG. 2B).
Unlike a conventional turnbuckle, which has a cross-sectional structure that is determined by tensile strength (see the cross-sectional view in Fig. 8), the straight part that does not have a screw is the minimum if the strength (bending, shearing, bearing pressure) of the screw thread is sufficient. It is decided by securing the limit and is not affected by the tensile force at all. Therefore, adjuster 3
Has a much smaller diameter than conventional turnbuckles, and because of its sliding function, it is short and lightweight, and can be economically inexpensive. In the present invention,
One of the inner screw and the outer screw of the adjuster 3 may be a positive screw, and the other may be a reverse screw.
The screw of the clevis 4 may be a normal screw or a reverse screw.

FIG. 3 shows a terminal fitting 1 for a rod according to another embodiment of the present invention. It goes without saying that the terminal fitting 1 is composed of the adjuster 3 and the clevis 4 and has the same structure and function as those of the first embodiment shown in FIGS. In this terminal fitting 1, the adjuster 3 is a pull member 5 made of a rod.
It has a feature in that it is directly attached to the end of by screw fitting. That is, in the adjuster 3, the female screw portion 8 is screwed to the male screw portion provided on the outer peripheral portion of the end portion of the rod which is the tension member 5, and therefore the rod 5 and the clevis 4 are connected. The adjuster 3 is screwed and interposed between the two so as to play a role of adjusting the length. The procedure of the method of adjusting the length of the rod in the terminal fitting 1 is the same as in the case of the first embodiment shown in FIGS.

[0018]

Embodiments of the present invention will be described below with reference to FIGS. In one embodiment shown in FIGS. 1 and 2, an engaging portion for engaging a turning jig is formed on the collar portion which is the turning engaging portion of the adjuster 3. This engaging portion is composed of two dog holes 13 drilled from the surface of the flange portion by a cone, and small holes having a diameter of several millimeters and a depth of several millimeters are provided at symmetrical positions in the radial direction of the collar. By using the two dog holes 13 to engage the turning jig with the flange and rotate the jig,
The adjuster 3 can be easily turned clockwise or counterclockwise. Although the turning jig is not shown, for example, it is a tool similar to a general-purpose monkey spanner, and the dog corresponding to the dog hole 13 is projected from the holding surface of the holding piece of the spanner. Such a simple structure is used.

In the above-described one embodiment, the adjuster 3 is further provided with a screw hole 14. This screw hole 14
At least one flange portion is provided so as to penetrate to the inside of the cylinder. Further, the clevis 4 is similarly provided with a screw hole 15. At least one screw hole 15 is provided at a position near the end of the female screw portion 10 so as to penetrate into the cylinder. A set screw for preventing rotation is screwed into the screw hole 14 and the screw hole 15, but the tip end of the set screw is pressed to the peripheral surface of the threaded sleeve 2 and the peripheral surface of the male screw portion 9 of the adjuster 3. It is possible to stop the rotation slip between the threaded sleeve 2 and the adjuster 3 and between the adjuster 3 and the clevis 4 in the assembled terminal fitting 1 by tightening the screw as described above, and the length is adjusted. It is possible to reliably prevent the terminal fitting 1 from being loosened by being rotated by an external force.

Although not shown in the other embodiments shown in FIG. 3, the adjuster 3 is provided with an engaging portion consisting of a dog hole 13 and a screw hole 14 as well.
On the other hand, the clevis 4 is also provided with a screw hole 15 to facilitate the engagement and engagement with the turning jig, and to prevent the rotation slip between the rod 5 and the adjuster 3 and between the adjuster 3 and the clevis 4. The points to be obtained are the same as those of the first embodiment shown in FIG.

FIG. 4 shows a terminal fitting 1 according to another embodiment of the present invention. The example shown in FIG. 4 is a terminal fitting applied to a 1 × 37, φ30 mm spiral rope which is a kind of wire rope, and the threaded sleeve 2 is made of carbon steel.
(S35CN), adjuster 3 is chrome molybdenum steel (SCM
440) and the dimensions of each part are as described below. (1), Threaded sleeve 2; Overall length L ₁ : 612 mm, External thread 7 thread length L ₂ : 115 mm, External thread 7 screw nominal: M56 × 5.5 Left screw, (2), Adjuster 3; Total length L _3: 135mm, inner and outer of the two screw thread portion length L _4: 60 mm, inner screw thread called: M56 × 5.5 left-hand thread, the external thread screw nominal: M76 × 6.0 right screw, (3), the clevis 4; Rear end / hole 12 center-to-center length L ₅ : 327 mm, internal thread 10 thread length L ₆ : 115 mm, internal thread 10 screw nominal: M76 × 6.0 right screw,

When the spiral rope is erected using the terminal fitting 1 described above, a sleeve 2 with a screw is shown in FIG.
The length L ₇ from the hole to the center of the hole 12 is 214.29 mm in the center set state of (A) and 267 mm in the longest set state of (B).
, (C) is 161.58 mm in the shortest set state, and when the adjuster 3 is turned clockwise and counterclockwise to the maximum from the standard center set state, the outer screw pitch 6 mm moves by 25 mm and the inner screw pitch 5.5 mm moves by 25.21 mm. As a result, the threaded sleeve 2 moves 52.71 mm with respect to the clevis 4, and as a result, the threaded sleeve 2 moves to 52.71X2 = 105.42 mm.
The length can be slid. And adjuster 3
Is a thin and small member with a length of 135 mm, an outer diameter of 76 mm, and a wall thickness of about 7 mm, and it is clear that it can be sufficiently applied to a φ30 mm spiral rope.

[0023]

The present invention has the above-described structure and functions, and exhibits various excellent effects as described below. That is, the adjuster, which is a member that particularly performs the length adjusting function in the terminal fitting for length adjustment, is directly fitted to the tension member or fitted to the threaded sleeve fixed to the tension member. Since most of the parts are built into the clevis, the length of the terminal fittings can be made sufficiently shorter than the conventional one. In addition, in the conventional terminal fitting, the dimension becomes thicker at the turnbuckle portion (intermediate portion), whereas in the present invention, as described above, the clevis has the adjuster inside and the threaded sleeve therein. As it enters, the shape changes gradually and becomes smarter, so that it is possible to secure a sufficient storage space for the ends of the cable and rod tension members. Moreover, since the terminal fitting is small and compact, it is economically inexpensive.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a length adjusting terminal fitting for a wire rope according to an embodiment of the present invention, in which (A) is a central set state, (B) is a longest set state, and (C) is The shortest set state is shown respectively.

2A and 2B are views showing the structure of the adjuster 3 in FIG. 1, in which FIG. 2A is a left side view and FIG. 2B is a front view in vertical section.

FIG. 3 is a front view showing a vertical cross section of a length adjusting terminal fitting according to another embodiment of the present invention.

FIG. 4 is a vertical sectional front view of a length adjusting terminal fitting for a wire rope according to another embodiment of the present invention, where (A) is a central set state, (B) is a longest set state, and (C). Indicates the shortest set state, respectively.

FIG. 5 is a partial side view showing a glass ridge structure.

6 is a perspective view of the structure shown in FIG. 5 viewed from the back side.

FIG. 7 is a vertical sectional front view of a conventional length adjusting terminal fitting.

FIG. 8 is a sectional view taken along the line BB in FIG. 7;

[Explanation of symbols]

1 ... Terminal fitting for length adjustment, 2 ... Sleeve with screw, 3
... Adjuster, 4 ... Clevis, 5 ... Tensile member, 6 ... Hole, 7 ... Male screw part, 8
… Female screw part, 9… Male screw part, 10… Female screw part,
11 ... Engagement part, 12 ... Hole, 13 ... Dog hole, 14 ... Screw hole, 15 ... Screw hole, 16 ... Glass ridge, 17 ... Cable truss, 18 ... Glass curtain wall, 19 ... Length adjustment terminal metal fittings, 20 ... Fork bolt, 2
1 ... turnbuckle,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 595081079 Rafael Vinioli Architects Office 2-4-1, Marunouchi, Chiyoda-ku, Tokyo (71) Applicant 595081080 Structural Design Group, Hiroo Shibuya-ku, Tokyo 5 -9-9 (72) Inventor Yuji Hamasaki 10-1 Nakahama-cho, Amagasaki City Shinko Steel Wire Industrial Co., Ltd. (72) Inventor Tawara 2-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Gumi Tokyo Head Office (72) Inventor Yasuhisa Hishishima 18-19 Miyamachi, Kawaguchi City, Saitama Prefecture Kawaguchi Metal Industry Co., Ltd. (72) Inventor Rafael Vinioli 2-4-1, Marunouchi, Chiyoda-ku, Tokyo Rafael Vinioli Architect In the office (72) Inventor Kunio Watanabe 5-9-9 Hiroo, Shibuya-ku, Tokyo Within the structural design group

Claims (4)

[Claims] 1. A terminal fitting 1 for adjusting the length of a tension member 5 composed of a wire rope installed under tension in a structure in civil engineering or construction, and a male screw portion 7 at a tip outer peripheral portion. And a threaded sleeve 2 coaxially integrally fixed to the end of the tension member 5 and a tubular shape, and a female threaded portion 8 that is threadedly engaged with the male threaded portion 7 is formed on the inner peripheral portion of the cylinder. In addition, an adjuster 3 having a male screw portion 9 opposite to the female screw portion 8 formed on the outer peripheral portion of the cylinder, and a female screw portion 10 screwed to the male screw portion 9 of the adjuster 3 at one end, An end fitting for adjusting the length of a tension member in a structure, wherein an engaging part 11 fixed to the structure comprises a clevis 4 formed at each of the other ends. 2. A terminal fitting 1 for adjusting the length of a tension member 5 composed of a rod erected under tension in a structure in civil engineering or construction, which has a tubular shape and a tip of the rod. An adjuster 3 in which a female screw portion 8 which is screwed into a male screw portion formed on the outer peripheral portion is formed on the inner peripheral portion of the cylinder, and a male screw portion 9 having a reverse thread to the female screw portion 8 is formed on the outer peripheral portion of the cylinder. A female screw portion 10 that is screwed into the male screw portion 9 of the adjuster 3 is provided at one end,
An end fitting for adjusting the length of a tension member in a structure, wherein an engaging part 11 fixed to the structure comprises a clevis 4 formed at each of the other ends. 3. The adjuster 3 has a female screw portion 8 and a male screw portion 9 extending from the tip portion to a length of at least about ½ of the total length.
3. The terminal fitting for adjusting the length of the tension member in the structure according to claim 1, wherein an engaging portion for engaging a turning jig is formed on the outer peripheral portion of the rear end. 4. The adjuster 3 has a screw hole 14 at the outer periphery of the rear end for screwing a set screw for rotation prevention, and the clevis 4 has a screw hole 15 for screwing a set screw for rotation prevention. The terminal fitting for adjusting the length of the tension member in the structure according to claim 3, which is provided in the screw portion 10.