JP5562279B2 - PC steel sheath connection device - Google Patents

Description

  The present invention relates to a connecting device for a sheath for a PC steel material for supporting a sheath disposed so as to intersect within a prestressed concrete structure.

  Conventionally, for example, in a mortar-shaped (conical shape with a larger diameter toward the upper side) prestressed concrete structure constituting the bottom plate of an egg-shaped tank, a plurality of sheaths into which PC steel materials are inserted are arranged spirally. (For example, refer nonpatent literature 1). Here, the sheaths are arranged so that the sheaths in the respective directions intersect each other by drawing spirals in different directions such as counterclockwise and clockwise. And in this arrangement | positioning, each sheath was attached to the reinforcing bar via the support stand, for example.

“Prestressed Concrete”, Prestressed Concrete Technology Association, March 1992, VOL. 34, NO. 2, p31-32

  By the way, in the conventional prestressed concrete structure, when the sheaths are arranged, the sheaths are individually supported although they are supported by the support frame.

  The present invention has been made in order to solve the above-described conventional drawbacks, and an object of the present invention is to provide a PC steel sheath coupling device capable of efficiently performing a sheath arranging operation. There is.

In order to achieve the above object, the PC steel sheath connecting apparatus according to the present invention has the following configuration. That is,
A connecting device for sheathes for PC steel according to the first aspect of the present invention is a crossing position of two intersecting sheaths in a plurality of sheaths that are arranged in a prestressed concrete structure and into which PC steel is inserted. It is a connecting device which connects with each other. The coupling device includes a holding portion that is rotated by each sheath so as to hold each of the two sheaths at the intersecting position, and a rotating shaft that is orthogonal to both directions in which the two sheaths extend. A connecting portion that is connected so as to be relatively rotatable about the center.

  According to this PC steel sheath connecting device, each sheath is held by the holding portion connected by the connecting portion at the intersection of the two sheaths. As a result, the two sheaths are connected, and the relative movement of the sheaths at the intersecting position is suppressed. And both holding | maintenance parts can be relatively rotated by the connection part around the rotation axis center orthogonal to the both directions where two sheaths extend, and the relative angle at the intersecting position of these two sheaths is It can be adjusted to a desired angle. And the arrangement | positioning operation | movement of a sheath can be assisted by adjusting the relative angle in the crossing position of a sheath in this way, and suppressing the relative movement of these sheaths.

  According to a second aspect of the present invention, there is provided the connecting device for a sheath for PC steel material according to the first aspect, wherein the connecting portion includes a male screw that is screwed together to connect the holding portions to each other. A female screw is provided, and the axis of the male screw and the female screw forms the rotational axis.

  Moreover, the connection apparatus of the sheath for PC steel materials which concerns on invention of Claim 3 is the connection apparatus of Claim 1 or 2, The said holding | maintenance part is the holding | maintenance base on the said connection part side, The holding | maintenance base, A sandwiching part for sandwiching the sheath, and fixing means for detachably securing the sandwiching part to the holding base.

  According to a fourth aspect of the present invention, there is provided the connecting device for a sheath for PC steel material according to any one of the first to third aspects, wherein the connecting portion is the rotation of the holding portions. A fixing means is provided for fixing the holding portions to each other at an arbitrary relative rotational position around the dynamic axis.

  According to a fifth aspect of the present invention, there is provided the connecting device for the sheath for PC steel material according to the second or third aspect, wherein the male screw is fixed to one of the holding portions. The female screw is fixed to the other holding portion of the holding portions. Then, due to the relative rotation of the male screw and the female screw that are screwed together, the one holding portion and the other holding portion relatively rotate around the rotation axis.

  According to a sixth aspect of the present invention, there is provided the connecting device for a sheath for PC steel material according to the fifth aspect, wherein the connecting portion is located between the one holding portion and the female screw, and the male screw. A fixing nut is provided to be screwed onto. Then, at any relative rotational position of the one holding part and the other holding part, the one holding part and the other holding part are mutually connected by tightening the fixing nut to the female screw side. Fixed.

  According to a seventh aspect of the present invention, there is provided the connecting device for the sheath for PC steel material according to the second or third aspect, wherein the connecting portion extends from one of the holding portions. And one pedestal provided with the male screw and the other pedestal provided with the female screw extending from the other holding portion of the holding portions. The one pedestal and the other pedestal are capable of relative rotation about the rotation axis via the male screw, and at any relative rotation position, the male screw and the female screw By tightening each other, the one base and the other base are fixed to each other.

  According to the connecting device for a sheath for PC steel material according to the present invention, the relative angle at the crossing position of the sheaths is adjusted, and the relative movement of these sheaths is suppressed, so that the sheath disposing operation can be assisted. As a result, the sheath can be disposed efficiently.

It is a front view which shows typically arrangement | positioning of the sheath of one Embodiment of this invention. Similarly, it is a top view which shows arrangement | positioning of a sheath typically. Similarly, it is an expanded view which shows arrangement | positioning of a sheath typically. Similarly, it is the principal part enlarged view which abbreviate | omitted the reinforcing bar in the crossing position of a sheath. Similarly, it is an A arrow view in FIG. Similarly, it is a front view of a connecting device. Similarly, it is a top view of a connection device. It is a front view of a connecting device of other embodiments of this invention. It is a front view of the connecting device of further another embodiment of this invention. Similarly, it is a top view of a connection device.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the connection apparatus of the sheath for PC steel materials which concerns on this invention is demonstrated based on drawing.

  1 to 7 show an embodiment of the present invention. Reference numeral 1 in the figure is a foundation for supporting, for example, a windmill or a tower. 1a is a foundation body as a prestressed concrete structure that constitutes the foundation 1. 2 is a synthetic resin sheath, for example. 3 is a connecting device. This connecting device 3 is arranged in the crossing position of two intersecting sheaths 2 and 2 in a plurality of sheaths 2 and 2 which are disposed in the basic body 1a and into which a PC steel material (not shown) is inserted. Are connected to each other.

  Here, the foundation 1 includes a hollow foundation main body 1a (prestressed concrete structure) and a filling material (not shown) that fills the inner space. The base main body 1a includes a bottom plate 1x, a main body portion 1b having a conical cylindrical shape on the bottom plate 1x, a cylindrical portion 1c extending upward from the main body portion 1b, and an overhang projecting in a bowl shape above the cylindrical portion 1c. 1d (see FIG. 1). Therefore, the sheaths 2 and 2 are arranged so that the sheaths 2 and 2 in the respective directions intersect with the main body portion 1b of the base body 1a by drawing spirals in different directions such as counterclockwise and clockwise. The In the illustrated embodiment, the sheaths 2 and 2 (in FIG. 1 to FIG. 3, the sheaths are indicated by solid lines and are defined as the counterclockwise sheaths) that draw a spiral while being inclined to the left. Sheaths 2 and 2 (indicated by broken lines in FIGS. 1 to 3, which are defined as a clockwise sheath) are arranged on the outer side and draw a spiral inclined upward. It is arranged. And in this basic | foundation main body 1a, the reinforcing bar 1e is arrange | positioned in the vertical and horizontal direction on the outer side and inner side rather than the sheaths 2 and 2.

  As shown in FIGS. 4 to 7, the coupling device 3 is configured so that each of the two sheaths 2 and 2 (in the illustrated embodiment, the left-handed sheath 2 and the right-handed sheath 2) are at their intersecting positions. The holding portions 4 and 4 rotated by the respective sheaths 2 and 2 so as to hold them, and the holding portions 4 and 4 are relatively rotated around a rotation axis 3a orthogonal to both directions in which the two sheaths 2 and 2 extend. And a connecting portion 5 that can be connected.

  Specifically, the holding portion 4 includes a holding base portion 4a on the connecting portion 5 side, a holding portion 4b that sandwiches the sheath 2 between the holding base portion 4a, and an adhesion that removably fixes the holding portion 4b to the holding base portion 4a. Means 4c. In addition, the connecting portion 5 includes a male screw 5a and a female screw 5b that are screwed together to connect the holding portions 4 and 4 together. The axial center of the male screw 5a and the female screw 5b forms the rotational axis 3a.

  Specifically, in the holding part 4, the holding base part 4a and the holding part 4b have a holding base body 4d and a holding part body 4e made of a semicircular plate, and these holding base bodies A circle surrounding the sheath 2 is formed by 4d and the sandwiching body 4e. The holding base portion 4a and the holding portion 4b have flanges 4f and 4g that protrude outward from the ends of the holding base main body 4d and the holding portion main body 4e so as to overlap each other. The fixing means 4c includes a fixing bolt 4h and a fixing nut 4i, and the fixing bolt 4h connects the flanges 4f and 4g from one of the overlapping flanges 4f and 4g (in the illustrated embodiment, the flange 4g). The fixing nut 4i is threadedly engaged with the fixing bolt 4h from the other side (in the illustrated embodiment, the flange 4f) side. And the clamping part 4b is fixed to the holding | maintenance base 4a by mutual fastening of these fixing bolts 4h and the fixing nut 4i. Here, instead of the fixing nut 4i, the flange (in the illustrated embodiment, the flange 4f) itself may be threaded.

  In the connecting portion 5, the male screw 5 a is fixed to one holding portion 401 side of the holding portions 4, 4, and the female screw 5 b is fixed to the other holding portion 402 side of the holding portions 4, 4. Fixed. Specifically, the male screw 5a is composed of a full screw bolt, and is directly fixed to one holding portion 401 (for example, fixed by welding, caulking, or bonding). The female screw 5b is made of a nut and directly fixed to the other holding portion 402 (for example, fixed by welding, caulking, or bonding). Therefore, by the relative rotation of the male screw 5a and the female screw 5b that are screwed together, the one holding portion 401 and the other holding portion 402 are relatively rotated around the rotation axis 3a. That is, the relative rotation between the male screw 5 a and the female screw 5 b that are screwed together is the relative rotation between the one holding portion 401 and the other holding portion 402.

  In the connecting device 3, after the two sheaths 2 and 2 are connected at the crossing position, for example, an outer reinforcing bar 1e and a rack reinforcing bar (not shown) passed to the inner reinforcing bar 1e as necessary. It fixes to these reinforcing bars 1e and 1e via. In addition, the sheath 2 is fixed to the reinforcing bars 1e and 1e at appropriate positions via similar rack bars (not shown).

  Next, the effect of the connection device 3 of the PC steel sheath 2 having the above configuration will be described. According to the connecting device 3 for the sheath 2 for PC steel material, the sheaths 2 and 2 are held by the holding portions 4 and 4 connected by the connecting portion 5 at the crossing position of the two sheaths 2 and 2. . Thereby, the two sheaths 2 and 2 are connected, and the relative movement of the sheaths 2 and 2 at the crossing position is suppressed. The two holding portions 4, 4 can be rotated relative to each other around the rotation axis 3 a perpendicular to both directions in which the two sheaths 2, 2 extend by the connecting portion 5. The relative angle at the two intersection positions can be adjusted to a desired angle. That is, in the plurality of sheaths 2 and 2 disposed in the base body 1a, even if the desired relative angle at each crossing position is different, the two holding portions 4 and 4 are rotated relative to each other so as to match the relative angle. It can be easily handled by moving it. And, in this way, by adjusting the relative angle at the crossing position of the sheaths 2 and 2 and suppressing the relative movement of the sheaths 2 and 2, the disposing work of the sheaths 2 and 2 can be assisted. Moreover, the arrangement | positioning operation | work of the sheaths 2 and 2 can be performed efficiently by this.

  Moreover, in the connection part 5, the structure of this connection part 5 becomes simple because the axial center in the external thread 5a and internal thread 5b for connecting the holding | maintenance parts 4 and 4 forms the rotation axis 3a as it is. Moreover, the structure of the connecting portion 5 is further simplified by fixing the male screw 5a to the one holding portion 401 side and the female screw 5b to the other holding portion 402 side. In the illustrated embodiment, the male screw 5a and the female screw 5b are directly fixed to the holding portions 401 and 402 (4, 4), but may be fixed via an inclusion such as a leg portion.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the prestressed concrete structure may be a structure that constitutes a tank, a dome, or the like, instead of one that constitutes the foundation 1 (in the illustrated embodiment, the foundation body 1a), and the shape thereof is In addition to the conical cylinder shape, it may be a cylindrical shape or a shape constituting a part or all of an oval shape.

  Further, the connecting device 3 is used to connect the sheaths 2 and 2 that draw spirals in the counterclockwise direction and the clockwise direction at the intersecting positions, and the sheaths 2 and 2 arranged vertically and horizontally are disposed at the intersecting positions. It may be used to connect with.

  Further, the connecting portion 5 includes a fixing means 5c for fixing the holding portions 4 and 4 to each other at an arbitrary relative rotation position between the holding portions 4 and 4 around the rotation axis 3a. Good. In the example shown in FIG. 8, the connecting part 5 includes a fixing nut 5d as a fixing means 5c that is screwed into the male screw 5a between the one holding part 401 and the female screw 5b. Then, by fixing the fixing nut 5d to the female screw 5b side at an arbitrary relative rotation position between the one holding part 401 and the other holding part 402 (that is, a so-called double nut is formed by the female screw 5b and the fixing nut 5d). As a result, one holding part 401 and the other holding part 402 are fixed to each other.

  Further, as shown in FIGS. 9 and 10, the connecting portion 5 includes one pedestal 5 e extending from one holding portion 401 of the holding portions 4, 4 and provided with a male screw 5 a, and the holding portion 4, 4 and the other pedestal 5f provided with the female screw 5b. Here, the one pedestal 5e and the other pedestal 5f are capable of relative rotation about the rotation axis 3a (that is, the axis of the male screw 5a and the female screw 5b) via the male screw 5a. At an arbitrary relative rotation position, one base 5e and the other base 5f are fixed to each other by fastening the male screw 5a and the female screw 5b to each other. That is, the axial centers of the male screw 5a and the female screw 5b not only form the rotational axis 3a, but the male screw 5a and the female screw 5b fix the holding portions 401 and 402 (4, 4) to each other. Fixing means 5c is provided.

  Specifically, one seat plate 5g is provided at the tip of one pedestal 5e, and the other seat plate 5h is provided at the tip of the other pedestal 5f, and these seat plates 5g and 5h protrude. Combined. In the illustrated embodiment, the pedestals 5e and 5f are formed, for example, in a U shape, and their ends are fixed to the holding portions 401 and 402 (4, 4) by welding or the like, and the U-shaped intermediate side is The seat plates 5g and 5h are provided. Here, the male screw 5a has a shaft portion 5i penetrating through one seat plate 5g and the other seat plate 5h from the back side of one seat plate 5g so that the female screw 5b can be rotated. From the back side of the other seat plate 5h, it is screwed into the male screw 5a. Thus, in the illustrated embodiment, the male screw 5a is rotatable with respect to one pedestal 5e, and the female screw 5b is rotatable with respect to the other pedestal 5f. For example, the male screw 5a may be unrotatable with respect to the one base 5e by fixing the head 5j of the male screw 5a to one seat plate 5g by welding or the like. On the contrary, by fixing the female screw 5b to the other seat plate 5h by welding or the like, the female screw 5b may not be rotatable with respect to the other pedestal 5f. In this case, the female screw 5b may not be formed of a member different from the other seat plate 5h, but may be formed by threading the other seat plate 5h itself.

  The connecting portion 5 includes a male screw 5a and a female screw 5b that are screwed to each other in order to connect the holding portions 4 and 4, but a shaft that is not screwed in place of the male screw 5a and the female screw 5b. A member may be provided. That is, the axis of the shaft member may be the rotation axis 3a, and the holding members 4 and 4 may be connected to each other so as to be relatively rotatable by the shaft member.

  Moreover, in the holding part 4, although the holding base part 4a and the clamping part 4b have rigidity, the clamping part 4b may consist of a strip plate which can be bent and deformed. And when the clamping part 4b can be bent and deformed, the holding base part 4a may be formed shorter than a semicircle.

  Further, the fixing means 4c in the holding portion 4 may not be formed of the fixing bolt 4h and the fixing nut 4i, but may be formed of a linear material such as a string for binding the overlapping flanges 4f and 4g or a wire. The fixing means 4c includes a locking part provided on one of the holding base part 4a and the clamping part 4b and a locked part such as a claw provided on the other side and locked to the locking part. May be. Further, the fixing means 4c may include a hinge that connects the holding base portion 4a and the sandwiching portion 4b at one end and the various fixing means 4c described above provided at the other end.

1a Foundation body (Prestressed concrete structure)
2 sheath 3 connecting device 3a rotational axis 4 holding part 401 one holding part 402 other holding part 4a holding base part 4b holding part 4c fixing means 5 connecting part 5a male screw 5b female screw 5c fixing means 5d fixing nut 5e one base 5f The other pedestal

Claims (7)

A connecting device for connecting two intersecting sheaths in a plurality of sheaths arranged in a prestressed concrete structure into which a PC steel material is inserted, at the intersecting positions,
A holding portion that is rotated by each sheath so as to hold each of the two sheaths at the intersecting position, and a relative rotation of the holding portions around a rotation axis that is orthogonal to both directions in which the two sheaths extend. A connecting device for a sheath for PC steel material, comprising: a connecting portion that is movably connected.   The connection portion includes a male screw and a female screw that are screwed together to connect the holding portions, and an axis of the male screw and the female screw forms the rotation axis. The connecting device for a sheath for PC steel according to 1.   The holding part includes a holding base on the coupling part side, a holding part that sandwiches the sheath between the holding base, and a fixing unit that detachably fixes the holding part to the holding base. The connecting device for a sheath for PC steel material according to claim 1 or 2.   The said connection part is equipped with the fixing means which fixes these holding parts mutually in the arbitrary relative rotation positions of the said holding parts around the said rotation axis. The connecting apparatus of the sheath for PC steel materials of any one of these. The male screw is fixed to one holding part side of the holding part, and the female screw is fixed to the other holding part side of the holding part,
The relative rotation of the male screw and the female screw that are screwed to each other causes the one holding portion and the other holding portion to rotate relative to each other about the rotation axis. Or the connection apparatus of the sheath for PC steel materials of 3.   The connecting portion includes a fixing nut that is screwed to the male screw between the one holding portion and the female screw, and at an arbitrary relative rotation position of the one holding portion and the other holding portion, 6. The sheathing device for a PC steel material according to claim 5, wherein the one holding portion and the other holding portion are fixed to each other by tightening the fixing nut to the female screw side. The connecting portion extends from one holding portion of the holding portions and is provided with the male screw, and the connecting portion extends from the other holding portion of the holding portions and is provided with the female screw. With the other pedestal,
The one pedestal and the other pedestal can be relatively rotated about the rotation axis via the male screw, and the male screw and the female screw can be mutually rotated at an arbitrary relative rotational position. 4. The PC steel sheath connecting device according to claim 2, wherein the one base and the other base are fixed to each other by tightening.

Images