JP2001323659A - Tension adjusting device for tension member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a loading nut after a tension adjustment and achieve an external appearance desirable in design after a tension adjusting device is removed. SOLUTION: This tension adjusting device is removably fitted to tension members 2a and 2b screwed to both ends of a coupler 4 and connected into a straight line shape to adjustably apply tension to the tension members 2a and 2b via hydraulic actions. It is provided with a pair of loading blocks 5 having female screw sections 5a capable of being halved and coupled with the male screw sections 3a and 3b of the tension members 2a and 2b near the outside of both ends of the coupler 4, a pair of reaction beams 6 arranged in contact with the outside end faces of the blocks 5, a pair of dummy bars 7 arranged on both sides along the tension members 2a and 2b and astride a pair of reaction beams 6, and a pair of hydraulic jacks 8 arranged on one-side end sections of the dummy bars 7. The reaction beams 6 press the loading blocks 5 kept in contact with them to the coupler 4 side in response to the actions of the hydraulic jacks 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension adjusting device for a tension member used for a brace material, a beam string, a suspended roof structure, a cable dome structure, or a tension system for supporting a glass wall surface.

[0002]

2. Description of the Related Art Conventionally, as a tension adjusting device for this kind of tendon, for example, Japanese Patent Application Laid-Open No. Hei 8-200325 has been disclosed (shown in FIG. 4 as a first conventional example). Japanese Unexamined Patent Publication (Kokai) No. H10-26,026 (FIG. 5 shows a second conventional example).

[0003] A tension adjusting device 101 of a first conventional example is shown in FIG.
As shown in the figure, reaction force beams 105, which are disposed at the intermediate portions of the tension members 102a, 102b and are set at both ends of two force nuts 104, 104 screwed into the thread portions of the tension members 102a, 102b, respectively. 105, a hydraulic jack 106
By applying a compressive force to the tension members 102a, 10b, the turn operation of the turnbuckle 107 can be performed with a small force even under a situation where a large tension is applied.
2b is adjusted by applying tension thereto. When the adjustment is completed, the reaction force beam 105 and the hydraulic jack 106 are removed, and the force nut 104 is moved toward the turnbuckle 107 and tightened.

[0004] Further, a tension adjusting device 121 of a second conventional example.
Relates to a tension truss that supports a glass wall surface. As shown in FIG. 5, a tension adjusting device 121 is attached near an end of a tension member 122 to apply a tension between the tension member 122 and the pin block 123. Is to be adjusted. Therefore, the reaction force beam 1 is placed near the end of the tension member 122.
24 and the hydraulic jack 125 are installed and the tendon 122
Apply tension to and adjust.

[0005]

With such a configuration, in the tension adjusting device 101 of the first conventional example, the tension member 10 is used.
After the tension adjustment of 2a and 102b, the force nut 104 remains on the tension members 102a and 102b even after the tension adjustment,
There is a problem that it is not desirable in design.

In FIG. 4, the left end of the tendon 102a is attached to a gusset on the structural member side (not shown), and the upper end 105a of the left reaction force beam 105 is attached to the gusset by bolts. In such a case, mounting bolt holes remain in the gusset after removing the tension adjusting device. Therefore, the pinning configuration has a problem that the pins are large and long.

On the other hand, a tension adjusting device 121 of a second conventional example.
However, if there is not enough space near the end of the tension member 122, the reaction beam 124 and the hydraulic jack 125 cannot be installed, and the tension adjusting device 121 cannot be used.

Accordingly, an object of the present invention is to make it possible to remove a load nut after tension adjustment, and to obtain a desirable appearance in design after removing the tension adjustment device.

[0009]

Means for Solving the Problems To solve the above problems, the present invention is configured as follows.

According to a first aspect of the present invention, the tension member is removably attached to a rod-like tension member which is screwed into each end of a hollow cylindrical coupler and connected linearly, and the tension is adjusted by hydraulic operation. A tension adjusting device for a tendon material which is provided so as to be capable of being provided. A force block, a pair of reaction members arranged in contact with the end surface on the counter coupler side of each of the force blocks, and arranged across the pair of reaction members arranged on both sides along the tension member. A pair of dummy bars, and a pair of hydraulic actuators respectively disposed on one end of the both dummy bars, and a force applied by the pair of reaction members in accordance with the hydraulic operation of the hydraulic actuator. Characterized in that it pushes the lock to the coupler side.

A second invention is characterized in that, in the first invention, the fixing members at both ends of the pair of dummy bars hold the pair of reaction members and the pair of force blocks in contact with each other.

According to a third aspect of the present invention, in the first or second aspect, the two reaction force members are arranged so that the tension member and the pair of dummy bars, which are arranged on substantially one plane, are vertically spaced at a predetermined interval. It is characterized in that a pair of U-shaped members arranged to be sandwiched and back to back are integrated by a fastener.

[0013]

According to the present invention, unlike the first conventional example, the load nut can be removed after adjusting the tension by using a load block that can be divided into two instead of the load nut, which is a design problem. Therefore, the appearance of the design becomes desirable even after the tension adjusting device is removed.

Further, unlike the second conventional example, since the tension is adjusted at the intermediate portion of the tendon, the restriction due to the installation space of the tension adjusting device is eased.

[0015]

1 to 3 show an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1A is a plan view of the present embodiment, FIG. 1B is a view taken in the direction of arrow A in FIG.
FIG. 3 is a perspective view of a force block in FIGS. 2 and 3 are explanatory diagrams showing various application examples of the tendon.

As shown in FIG. 1 (a), this tension adjusting device 1 is placed on the same axis and is placed at an intermediate portion between two tendon members 2a and 2b extending in the left-right direction. The opposite ends of the tendon members 2a and 2b are connected to each other, and a tension is applied to the tension members and adjusted. Rod-shaped left and right tendons 2a, 2b
The opposite ends of the threaded portions 3a and 3b are formed with right-handed and left-handed reverse screws, and the threaded portions 3a and 3b are screwed into the respective ends of the coupler 4. Thus, the tension members 2a, 2
b is linearly connected via the coupler 4. A parallel surface portion 4a is formed on an outer periphery of a central portion of the coupler 4 in the longitudinal direction.

The tension adjusting device 1 for applying and adjusting tension to the tension members 2a and 2b includes a pair of force blocks 5 and 5,
A pair of reaction force beams (reaction members) 6, 6 disposed on the left and right sides of the coupler 4, a pair of dummy bars 7, 7, and a pair of hydraulic jacks 8, 8 (hydraulic actuator)
It is composed of

The pressing block 5 is formed in two halves, and each half is integrated with a connecting plate 9 and a bolt 11. At this time, since the screw portion 5a is formed at the center of the force applying block 5, the tension members 2a and 2b are externally threaded.
a and 3b are screwed together.

As shown in FIG. 1 (b), each of the reaction force beams 6 is arranged back to back with a pair of shaped steel members 20 interposed therebetween with a spacer 12 and a centering ring 13 therebetween.
It is configured by being integrated with a nut 14. At this time, the side end face 6 a of the coupler 4 of the reaction force beam 6 is in contact with the load block 5.

The pair of dummy bars 7, 7 are made of PC steel bars, are arranged in parallel with the tension members 2a, 2b, and are arranged across the pair of reaction force beams 6, 6. One end of each dummy bar 7 penetrates the center of the center hole type hydraulic jack 8. The hydraulic jack 8 is connected to a hydraulic source (not shown).

In the above-described tension adjusting device, when a hydraulic operation is applied from a hydraulic source, the cylinder case 8a of the hydraulic jack 8 connects the reaction force beam 6 via the square washer 16 to the coupler 4.
Press to the side (to the right). Thus, the side end surface 6a of the reaction force beam 6 on the coupler 4 side presses the load block 5 (and the tendon 2a) toward the coupler 4.

At the same time, a piston (not shown) in the cylinder case 8a is pressed by a hydraulic operation (to the left) toward a nut (fixing tool) 15 at one end which is in contact with the piston. Thus, the piston tries to draw the reaction beam 6 on the other side toward the coupler 4 via the nut 15, the dummy bar 7, the nut 15 on the other end, and the square washer 16. Thus,
The side end surface 6a of the other side reaction beam 6 on the coupler 4 side presses the load block 5 (tensile member 2b) toward the coupler 4 side.

Next, the operation of the tension adjusting device 1 will be described. When hydraulic pressure from the hydraulic pressure source is applied to the hydraulic jack 8,
The left reaction beam 6 presses the tendon 2a rightward via the left force block 5. At this time, a tensile force of the reaction force acts on the dummy bar 7, and the tendon 2b is pulled to the left via the right reaction force beam 6 and the right force block 5. At this time, the coupler 4 is manually turned, or a wrench is inserted into the parallel surface portion 4a forming the polygon, and the coupler 4 is turned in a direction to draw the tension members 2a and 2b.
Since the hydraulic pressure is acting, this turning operation can be easily performed.

By adjusting the hydraulic pressure, the tension applied to the tendons 2a, 2b can be kept at a predetermined value. After the adjustment is completed and the tension adjusting device 1 is removed, the applied tension is held by the coupler 4. Since the load block 5 is also removed at the time of this removal, the tension members 2a and 2b after removal have a desirable appearance in design.

FIGS. 2 (a) and 2 (b) both show tendons 2a,
2b shows an example in which the string beam is applied to a string beam. Both are bridged between the supporting structural members at both ends, the lower side is a tension member (tension member) 2a, 2b, and the upper side is a compression / bending material 21. Reference numeral 22 denotes a bundle. FIG. 2C shows an example applied to a suspended roof structure. 2a and 2b are tendons.
FIG. 2D shows an example applied to a cable dome structure. 2a and 2b are tendons.

FIGS. 3A and 3B both show an example applied to a tension system for supporting a glass wall surface. FIG. 3A shows a closed system type tension glazing system. 23 is glass, 2
a and 2b are tendons, and 24 is a bundle. FIG. 3B shows an open system type tension glazing system. 23 is a glass, 2a and 2b are tendons, and 24 is a bundle.

[0027]

As described above, according to the present invention, the pair of reaction force beams press the abutting force blocks toward the coupler side according to the hydraulic operation, so that the coupler is manually turned on both sides. Since the tension can be applied by pulling the tendon material, the tension can be easily adjusted together with the application of the tension.

Further, after the tension is adjusted, all the adjusting devices including the force-splitting block which can be divided into two can be removed, so that a desirable design can be obtained even after the removal.

Further, by the action of the fixing members at the ends of the pair of dummy bars, the reaction force beam surely presses the applied block when the hydraulic actuator is operated, so that the tension can be reliably applied and adjusted.

Further, by arranging the U-shaped members back-to-back and tightening the reaction force beam, a sufficient strength capable of applying a pressing force with a configuration having a small workability is obtained.

[Brief description of the drawings]

FIG. 1A is a plan view of an embodiment of the present invention,
(B) is a view taken in the direction of arrow A in (a), and FIG.
It is a perspective view of a load block in (b).

FIGS. 2A to 2D are explanatory views showing various application examples of the tendon according to the embodiment.

FIGS. 3A and 3B are explanatory views showing still other various application examples of the tendon according to the embodiment.

FIG. 4 is a plan view of a first conventional example.

FIG. 5 is a plan view of a second conventional example.

[Explanation of symbols]

 2a, 2b Tensile material 3a, 3b Thread 4 Coupler 5 Force block 6 Reaction beam (reaction member) 6a Coupler-side end face of reaction beam 7 Dummy bar 8 Hydraulic jack (hydraulic actuator) 9 Connection plate 15 Nut (fixing tool) )

Claims (3)

[Claims] 1. A tensioner which is detachably attached to a rod-shaped tensioning member which is screwed into both ends of a hollow cylindrical coupler and is linearly connected, and which adjustably applies tension to the tensioning member by hydraulic operation. A tension adjusting device for the material,
A pair of force blocks which are formed with radially dividable female threads, and which are fitted to the external threads of the tendon members near the outside of both ends of the coupler, and a counter coupler of each of the force blocks A pair of reaction members disposed in contact with the side end surface, a pair of dummy bars disposed on both sides along the tension member and disposed across the pair of reaction members, and one end of the both dummy bars A pair of hydraulic actuators respectively disposed on the portion, and a tensioning member characterized in that a pair of reaction force members press a pressing block against which the pair of reaction members respectively abut against the coupler side according to the hydraulic operation of the hydraulic actuator. Tension adjustment device. 2. The tension adjusting device according to claim 1, wherein the fixing members at both ends of the pair of dummy bars hold the pair of reaction members and the pair of force blocks in contact with each other. A tension adjusting device for tendon material. 3. The tension adjusting device according to claim 1, wherein the two reaction members vertically move the tension member and a pair of dummy bars arranged on substantially one plane. A tension adjusting device for a tension member, wherein a pair of U-shaped members arranged back to back with a predetermined interval therebetween are integrated by a fastener.