JP2008050889A - Pc member connector and pc member connecting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a PC member connector which enables connection in a short time, is free from formation of fractures that are so large as to require repair, facilitates holding of adjusted conditions in terms of a horizontal angle and a location of precast concrete members to be connected thereto, and positively prevents a filler from leaking, and to provide a PC member connecting method. <P>SOLUTION: The PC member connector is formed of a first bent frame member 1 which extends along two surfaces adjacent to each other out of peripheral sides of joint portions obtained by connecting the precast concrete members PC, and a second bent frame member 2 which extends along the remaining two surfaces out of the peripheral sides of the joint portions. The PC member connector is further formed of fastening links 3 which are each attached to link portions near an end of the first bent frame member 1 and an end of the second bent frame member 2, for fastening the link members in a direction of a bent portion of the first bent frame member 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a PC member connector used when two precast concrete members (PC members) are joined together, or when a precast concrete member (PC member) is joined to another portion such as a slab, and the same. The present invention relates to a method for joining PC members.

  The connection of the precast concrete member is performed by filling a filler such as grout into a joint hole in which a joint portion and a reinforcing bar are inserted with the member connection surface as a boundary. When filling the filler, it is necessary to seal the joint portion with a mold material.

  Conventionally, as a method of joining the precast concrete members, the joint mortar was filled with the kneaded mortar along the periphery between the precast concrete members at the joining site, and it was waited for the toughened mortar to harden for half a day or one day. Later, there was a method of filling a filler inside the joint filling portion (see, for example, Patent Document 1).

  Further, as a method of eliminating the need for filling the joints at the site as described above and waiting for hardening thereof, there has been a method of preparing a sandwich material corresponding to the shape of the joint portion in advance. This is, for example, a method in which a sandwiching material composed of one air tube is placed while being bent along the four sides of the joint portion, sandwiched between joints, and filled with a filler.

Moreover, in addition to the joint filling and pinching in the joint part of the PC member as described above, there is one that prevents leakage of the filler by surrounding from the periphery of the installed PC member. As such, for example, two saddle-shaped frames are formed and bolted to form a mold (see, for example, Patent Document 2 or FIG. 19), and an air inlet / outlet valve is provided. Examples include a joint that surrounds the joint space with a rubber tube and holds the periphery with a band (for example, see Patent Document 3).
JP 2006-144251 A (paragraph number 0031, FIG. 6 etc.) Japanese Utility Model Publication No. 63-21962 (Fig. 1 etc.) JP 2000-17836 A

  However, the joint filling at the site takes a considerable time of more than half a day for itself to harden, greatly affecting the bonding process itself.

  On the other hand, it is necessary to remove the sandwiching material after the filler is solidified. If the filler is removed, the original sandwiched portion becomes a large defect, and joint repair is required after the filler is cured.

  Further, it is difficult for the sandwiching material to maintain the state after adjustment of the horizontal angle and position of the precast concrete member to be joined, that is, the joining position of the precast concrete member. For example, when the air tube is used, it is necessary to maintain a predetermined clamping pressure in order to prevent the filler from leaking out. However, if the air pressure filled in the tube is increased, the sandwiching material pushes up the precast concrete member. As a result, the position and angle of the precast concrete member will shift.

  Furthermore, it is difficult to prevent the filler from leaking around the PC member. For example, in the case of the above-mentioned mold form, the length of the side of the form form is determined, so that the filler may leak due to a minute positional shift. Further, since the rubber tube fastened by the band is difficult to fix around the joint portion with an equal force, for example, the rubber tube may not be sufficiently tightened near the center of the joint side and the filler may leak out.

  Therefore, in the present invention, the precast concrete member to be joined can be easily maintained in the state after adjustment, such as the horizontal angle and position, without causing a large defect that requires repair, and can be joined in a short time. It is an object of the present invention to provide a PC member connector that can reliably prevent leakage of the agent, and a method for bonding such PC members.

  In order to solve the above-mentioned problems, the following means (1) to (6) are taken in the present application.

(1) The PC member connector of the present invention includes a first bent frame material 1 along two adjacent surfaces among the periphery of the joint portion when the precast concrete member C is joined,
It consists of the 2nd bending frame material 2 which has a surface along the remaining 2 surfaces among the circumference | surroundings of the said junction part.
The first bent frame material 1 and the second bent frame material 2 are connected to each other near the tips,
By surrounding the joint portion of two precast concrete members C temporarily provided with a joint width H, a PC member jointer capable of holding the filler injected into the interior densely.
Then, each of the connection portions near both ends of the first bent frame material 1 and the second bent frame material 2 is provided with a fastening connector 3 that is tightened in the direction of the bent portion 4c of the first bent frame material 1. It is characterized by.

  That is, each of the fastening connectors 3 provided at both ends of the first bent frame member 1 to be connected to both ends of the second bent frame member 2 is in the direction of the bent portion 4c of the first bent frame member 1. To tighten.

  If it is such, the position after adjustment of the precast member to join can be reliably hold | maintained by enclosing the junction part temporarily formed beforehand from the outer peripheral side with a PC member connector. For this reason, it is possible to prevent the displacement of the joint width H due to the pinching of the conventional clamping tool.

  Moreover, the fastening connector 3 is provided at both ends of the first bending frame member 1, the connection positions of the plurality of fastening connection members 3 are different, and the tightening direction of all the fastening connection members 3 is the first bending frame member. This is common to the direction of one bent portion 4c. Thereby, it can enclose with the pulling force by the clamp | tightening to both of two-dimensional directions in planar view. For this reason, the circumference | surroundings of a junction part are fastened and hold | maintained with equal force. In addition, the first and second bent frame members 1 and 2 do not greatly enter into the joints of the connecting portions because they are surrounded by an equal force from the outer periphery, and the first and second bent frames are filled with the filler. Even after the frame materials 1 and 2 are disassembled, there is no large defect that requires repair.

(2) In the PC member connector, the first and second bent frame members 1, 2 are both
A bent plate 4 bent in an L-shape so as to be along two adjacent surfaces of the periphery of the joint portion;
It is preferable to include a joint contact portion 5 formed of an elastic body that is fixed to the side surface in the bending direction along the bending plate 4 and protrudes to the bending direction side of the fixed bending plate 4.

  In such a case, the L-shaped bent plate 4 securely holds the corner portion of the joint portion, and the two sides around the joint portion are evenly applied at all locations including the center portion of the side. It can be held with Go. Moreover, even if it is a filler with a low viscosity, it can make it solidify reliably in a junction part by enclosing a junction part by the joint contact part 5 which consists of elastic bodies, and making a joint contact.

  (3) Moreover, in the PC member connector, it is preferable that at least one of the first and second bent frame members includes an expansion / contraction mechanism that expands and contracts along a peripheral side of the bonding portion.

  If it is such, each side length of the bending board 4 can be adjusted according to the circumference of a junction part, and it can respond to the shape of various PC members. Thereby, even when joining a plurality of shapes, it is possible to join with only one PC member connector. Moreover, carrying around becomes easy by shortening each side length or matching the lengths of both sides.

  (4) Further, in any one of the PC member joints described above, the first and second bent frame members may change at least one of a bent angle or a connecting angle when connected to another bent frame member. It is preferable.

  If this is the case, even if a slight change in the angle is required at the corner of the joint portion, the angle after the change can be followed and a more flexible joint shape can be accommodated. . For this reason, it is difficult for the filler for adjusting the joint shape to leak out.

  (5) Moreover, in any one of the PC member joints described above, it is preferable that the joint contact portion is fixed to the bent plate in an exchangeable manner.

  If it is such, it can be repeatedly used by replacing | exchanging as needed, such as when the joint contact part 5 is damaged. Or it can replace with the joint contact part 5 from which elastic force differs, and the reliable filling process according to the kind of filler, the shape of a junction part, etc. can be performed.

  In particular, in the case where an expansion / contraction mechanism is provided, the length of the joint contact portion 5 can be easily changed by replacing and fixing the joint plate 5 according to the length of each side of the bending plate 4. Adjustment is possible.

(6) Moreover, the joining method of the PC member of this invention uses the said PC member connector.
And the temporary process which temporarily installs two precast concrete members C across the joint width H,
An enclosing step of enclosing and fixing the joint portion of the joint width H by connecting a pair of PC member connectors;
A joint filling step of filling a filler into the inner joint portion fixed with the go;
And an enclosure releasing step of releasing the enclosure fixation of the PC member connector after the filled filler is solidified.

  By making the pair of PC member joints into a connected state by the connection of the fastening connector 3, for example, a mold can be formed in a shorter time than in the case of forming a conventional frame on-site. In addition, since the surrounding process is performed instead of the sandwiching mold and the surrounding process is performed after the temporary process, the mold can be formed more easily.

  By taking the above measures, it is possible to join in a short time without waiting for an extra curing time, and without adjusting the horizontal angle and position of the precast concrete member to be joined without causing a large defect that requires repair. It is possible to provide a PC member connector that can reliably hold the joint portion and can reliably prevent leakage of the filler by surrounding and fixing the joint portion with equal force. Moreover, the joining method of such a PC member can be provided.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention will be described below together with the drawings shown as examples.

  1 to 7 show a connection state in which the first bent frame member 1 and the second bent frame member 2 are connected to each other, which is a PC member connector according to Embodiment 1 of the present invention. Specifically, FIG. 1 is a perspective overview of the connected state, and FIGS. 2 and 3 are enlarged perspective views of the vicinity of the fastening connector 3 and the bent portion 4c in FIG. 1, respectively. 4 to 7 are a plan view, a front view, a rear view, and a right side view, respectively, of the PC member connector of the first embodiment in a connected state.

  8 to 13 show the first bent frame member 1 that constitutes a part of the PC member connector of the first embodiment. Specifically, FIG. 8 is a plan view of the first bent frame member 1. 9 is a cross-sectional view taken along the line AA of the portion of the expansion / contraction mechanism 6 in FIG. 8, FIG. 10 is a partially enlarged plan view of the portion of the bent portion 4c in FIG. 8, and FIG. 11 is the folding mechanism 7 in FIG. FIG. FIGS. 12 and 13 are perspective explanatory views showing the expansion mechanism 6 of the first bent frame member 1 from the inside and the outside, respectively.

  14 and 15 show the second bent frame member 2 that constitutes a part of the PC member connector of the first embodiment. Specifically, FIG. 14 is a perspective view, and FIG. 15 is an explanatory plan view showing the folding mechanism 7.

  FIGS. 16 and 17 show a use state of the PC member joint of Example 1, that is, a joining method of the PC member joint of the present invention. Specifically, FIG. 16 is an explanatory plan view showing a state in the middle of the go process, and FIG. 17 is an explanatory front view showing a state before the filler injection process after the go process.

  FIG. 18 is an explanatory plan view showing an example of a usage state of a conventional PC member joining jig.

(PC member connector of the present invention)
The PC member connector of the present invention includes the first bent frame member 1 along two adjacent surfaces among the periphery of the joint portion when the precast concrete member C is joined, and the remaining of the periphery of the joint portion. It consists of the 2nd bending frame material 2 which has the surface along two surfaces. This PC member connector is temporarily installed with the joint width H separated by connecting the vicinity of the respective ends of the first bent frame material 1 and the second bent frame material 2 (FIGS. 1, 4 to 7). In addition, the joint portion between the two precast concrete members C can be surrounded and the filler injected into the inside can be held densely (FIGS. 16 and 17).

(First and second bent frame materials 1, 2)
Both the first and second bent frame members 1 and 2 are bent in a L shape so as to be along two adjacent surfaces of the periphery of the joint portion, and the bending direction along the bent plate 4. And a joint contact portion 5 made of an elastic body projecting from the side (FIGS. 8 to 15).

(Tightening connector 3)
Fastening that is connected to both ends of the second bent frame member 2 at both ends of the first bent frame member 1 and the first bent frame member 1 and tightened in the direction of the bent portion 4c of the first bent frame member 1. The connector 3 is provided (FIGS. 4 and 4).

  Specifically, the fastening connector 3 includes a bolt rod extending from both ends of the first bent frame member 1 in the same direction as the extending direction of the bent plate 4 and a nut screwed into the bolt rod. 31 and a locked tool 32 made of a perforated plate fixed to both ends of the second bent frame member 2 (FIG. 2).

(Locking tool 31 (bolt bar and nut))
The locking tool 31 provided at the tip of the first bent frame member 1 is hooked to the locked tool 32 provided at the tip of the second bent frame member 2, and the hooked member is bent to a bent plate. 4 is held to the bent portion 4c side. In the embodiment, it is composed of a bolt bar that is a rod 31b fixed along both side surfaces in the thickness direction of the bending plate 4, and a nut washer that is a locking piece 31n that is screwed to the tip of the rod (see FIG. 2).

  The bolt rod which is the rod body 31b extends from both ends of the first bent frame member 1 in the same direction as the extending direction of the bent plate 4. A total of two pairs of rod bodies 31b, one pair at each tip of the first bent frame member 1, are fixed so as to protrude in the tip direction of each tip of the bent plate 4. The fixing to the bending plate 4 can be removed by screwing into a hexagon nut welded and fixed to both side surfaces in the thickness direction of the bending plate 4 (FIG. 2). As a result, the bolt rod can be replaced with one having an appropriate length as required.

  The nut and the washer as the locking piece 31n have a locking surface to the plate surface of the perforated plate. By being screwed and fixed from the front end of the bolt rod that penetrates the locked hole 32h of the perforated plate that is the latching tool 32, the perforated plate surface around the locked hole 32h is locked. A nut having a uniform hooking surface in the entire circumferential direction of the bolt rod or the locked hole 32h, such as a nut, is preferable for stable locking.

  The locking tool 31 may have a locking piece structure in one direction or two directions, in addition to the entire circumferential locking structure such as the nut of the present embodiment.

  In the connected state of the first and second bent frame members 1 and 2, the rod 31 b of the locking tool 31 is inserted through the locked hole 32 h of the locked tool 32 and the locking tool 31 is locked. The outer surface of the perforated plate of the locked tool 32 is suppressed by the piece 31n. For this reason, the angle of the connecting portion is not fixed at 90 degrees and can be varied within one plane with a certain degree of freedom (FIG. 2).

(Locked tool 32)
The locked tool 32 is configured by a perforated plate extending from the second bent frame member 2 in the same direction as the extending direction of the bent plate 4. The perforated plates are fixedly provided on the side surfaces in the thickness direction of the bending plate 4 so that each pair has a locking surface perpendicular to the thickness direction. This perforated plate has a locked hole 32h through which the bolt rod of the first bent frame member 1 is inserted as a long hole shape in the same extending direction as the bent plate 4. The periphery of the locked hole 32h is a locking surface.

  By providing the fastening connector 3 at both ends of the first bent frame member 1, it is possible to surround it with a pulling force in both two-dimensional directions in a plan view. For this reason, the circumference | surroundings of a junction part are fastened and hold | maintained with equal force.

(Tightening direction)
The fastening connector 3 is provided at each end of the bent frame material. All of the tightening couplers 3 are tightened in the direction of pulling only to one of the bent portions 4c of the first or second bent frame member 2. (In the embodiment, the two tightening couplers 3 are tightened so as to be pulled only in the direction of the bent portion 4c of the first bent frame member 1.) By pulling and fixing only in the direction of one bent portion 4c, The PC member can be tightly tightened with a tightening force in two directions in a plan view as indicated by an arrow 4.

  The fastening force in two directions in plan view will be described in detail. For example, in the conventional fixing method as shown in FIG. 18, there is a fixing direction only in one direction in plan view (vertical direction in FIG. 18). The fixation in the viewing direction could not be adjusted because the length of the frame in the fixing direction was constant because the frame length was fixed. On the other hand, according to the present invention, the tightening direction of the plurality of tightening couplers 3 having different tightening directions is set to the direction toward all the one bent portion 4c (FIG. 4), thereby enclosing the tightening length. Tension can be concluded.

(Bent plate 4)
The bending plate 4 is configured such that two U-shaped cross sections having a length along two sides of the periphery of the joint portion of the PC member are hinged at each end so that the bending angle θ can be varied (FIG. 1). FIG. 3). When the bending angle is around 90 degrees, the whole is substantially L-shaped in plan view. The bending angle that can be varied by fixing the hinge can be adjusted to a range of at least 80 to 100 degrees.

  The U-shaped angle of the cross-section is arranged and fixed so that the U-shaped concave side of the cross-section faces the bending direction (FIGS. 2 and 3). The back plate 41 has a predetermined plate length 4l along the periphery of the joining portion, and the side plate 42 is integrally formed by bending from both ends of the back plate 41 in a vertical direction in a sectional view (FIG. 9). The joint contact portion 5 and the additional contact portion 65 made of an elastic body are sandwiched and fixed from both sides by a pair of parallel side plates 42 facing each other (FIG. 12).

  In the bent portion 4c to be hinged, the side plate is inclined at an angle of less than 45 degrees. As a result, even when the bending angle θ is 90 degrees or less, the side plates 45 having two U-shaped cross-sections adjacent to each other with the bent portion 4c as a boundary do not contact each other, and are adjacent to each other with the bent portion 4c as a boundary. A clearance angle ω can be secured between the side plates 45 (FIG. 10).

  In the embodiment, the plate length 4l of the bent plate 4 of the second bent frame member 2 is longer than the bent plate 4 at the shortest time of the first bent frame member 1 (FIG. 14). As a result, the tip of the bent plate 4 of the first bent frame member 1 is connected so as to contact the inner surface of the second bent frame member 1 on the bent end side with respect to the tip of the bent plate 4 of the second bent frame member 1 (FIG. 1). 4 to 7).

(Joint contact part 5)
The joint contact portion 5 is fixed to the bent plate 4 so as to be exchangeable similarly to the additional contact portion 65 shown in FIG. When the joint contact part 5 is damaged, etc., it is used repeatedly by replacing it as necessary. Or the reliable filling process according to the kind of filler, the shape of a junction part, etc. is performed by changing to the joint contact part 5 from which elastic force differs.

  The joint contact portion 5 is composed of a partial cylindrical body cut obliquely at the bent portion 4c. In the embodiment, it is a semi-cylinder, and the chord portion of the arc of the cross section contacts the concave bottom surface of the bent plate 4 having a U-shaped cross section, and both ends of the arc are compressed and sandwiched by the parallel side surfaces of the bent plate 4 facing each other. (FIG. 9).

  The joint contact portion 5 is formed of a partial cylindrical body having a foam material inside, and the end on the side of the bent portion 4c cut perpendicularly to the cylinder axis is spaced from the bent end by a minute distance inside the bent plate 4. It is inserted and fixed to. Then, as the bending angle becomes smaller, the ends of the two joint contact portions bordering on the bent portion 4c are brought into close contact with each other and elastically deformed, and joint contact without gaps is possible even at the corner portions (FIG. 10). ).

(Extension mechanism 6)
In addition, at least one of the first and second bent frame members 1 and 2 has an expansion / contraction mechanism 6 in which at least one of both ends or one end expands and contracts (FIGS. 12 and 13). If it is such, each side length of the bending board 4 can be adjusted according to the circumference of a junction part, and it can respond to the magnitude | size of various junction parts. Moreover, carrying around becomes easy by shortening each side length or matching the lengths of both sides.

  In Example 1, only the 1st bending frame material 1 has the expansion-contraction mechanism 6 in the both ends. The expansion / contraction mechanism 6 is provided so as to overlap with the inside of the bent plate 4 in the vicinity of the end thereof, and is detachable from the slide plate 64 that slides and extends from the end of the bent plate 4 and inside the extended slide plate 64. And an additional contact portion 65 that is additionally fixed to (FIGS. 9 and 12). The additional contact portion 65 is fixed so as to protrude inward of the slide plate 64 side by side along the distal end side of the joint contact portion 5 (FIG. 12).

  The slide plate 64 has a U-shaped cross section that is slightly smaller than the bent plate 4 and is fitted inside the angle of the bent plate 4. In addition, the slide rod 62 is erected and fixed from the back plate of the slide plate 64, and a fixing hole 61 made of a long hole along the extending direction of the bent plate is formed near the tip of the bent plate 4 (FIG. 9). FIG. 12 and FIG. 13). The long hole of the fixed hole 61 is formed by penetrating the slide rod 62 and is provided in a range in accordance with the slide movement position of the stacked slide plate 64. An external screw is provided in the vicinity of the upper end of the slide bar, and a wing nut is screwed as a fixing nut 63 therein. The slide position of the slide plate 64 is fixed by pressing the nut lower surface of the screwed fixing nut 63 and the outer surface of the slide plate 64 so as to sandwich the bent plate 4. After the slide plate 64 is slid and fixed in this manner, the additional contact portion 65 having a length corresponding to the slide length is sandwiched and fixed inside the slide plate 64. The additional contact portion 65 has the same material and the same cross-sectional shape as the joint contact portion 5.

(Folding mechanism 7)
The first and second bent frame members 1 and 2 both have a folding mechanism 7 that can be folded from a bent state into a two-folded state by rotating the bending plate 4 about the bent portion 4c as a hinge shaft. (FIGS. 11 and 15).

  Instead of the folding mechanism 7, a disassembling mechanism that can be disassembled in the vicinity of the bent portion 4 c may be provided (not shown).

(Method of joining PC members of the present invention)
The method for joining PC members of the present invention uses any of the above-described PC member joint tools, and includes the following steps.

Each process is
A temporary process of temporarily setting two precast concrete members C with a joint width H between the spacers S;
An enclosing step of enclosing the joint portion of the joint width H by connecting a pair of PC member joint tools, and pressing and fixing the joint portion with the joint contact portion;
A joint filling step of filling a filler such as grout into the inner joint portion fixed with the go;
-It is a go release process which cancels go fixing of the PC member connector after solidification of the filled filler.

  In the temporary process, the precast concrete member C to be joined is moved to an appropriate joining position for another precast concrete member C or a structure such as a slab, the position and angle are adjusted, and the spacer S is sandwiched between the joining surfaces. Hold and fix the joint position.

  For example, when one precast concrete member C is joined from the top of another precast concrete member C to form a pillar material, to a spacer fixing hole provided at a corresponding position on the joint surface of the other precast concrete member C, A rod-shaped spacer S is inserted and adjusted so that the spacer S protrudes from the joint surface by an appropriate length. Then, one precast concrete member C is placed on the upper end of the adjusted spacer S.

  Here, a plurality of joint holes Ch are provided in advance in the joint surface of one precast concrete member C, and positions corresponding to the joint holes Ch are provided in the joint surface of the other precast concrete member C. When the reinforcing bar Cr is provided so as to protrude upward, the reinforcing bar Cr is inserted into the corresponding joining hole Ch when placing one precast concrete member C (FIG. 17).

  At this time, the position and angle of one precast concrete member C are adjusted so that the column axis is coaxial.

  Next, in the surrounding process, the one precast concrete member C adjusted and temporarily installed in the temporary step and the other precast concrete member to be joined are surrounded and fixed by the PC member connector of the present invention. Specifically, the locking tool 31 is passed through the locking hole 32h, and the locking piece 31n is screwed into the rod body 31b and tightened (FIG. 16). At this time, the first and second bent frame members 1 and 2 corresponding to the two sides of the joint portion can be easily fixed by simply tightening and connecting from the periphery, so the work time is fast and the surrounding process is performed quickly. be able to.

  During this surrounding process, the bending angle θ and the angle of the joined portion after joining vary depending on the hinge fixing structure of the bent portion 4c and the locking structure inserted into the locking hole 32h. For this reason, it can respond to the shape of various junction parts. Moreover, since the joint contact part 5 consists of an elastic body, it follows the shape of a junction part like FIG. 17, and a filling space is sealed, maintaining a moderate pressurization state. As a result, the temporarily joined position is difficult to shift.

  Next, in the joint filling step, a filler such as grout is filled from one precast concrete member C injection hole Ci. The filler is filled in the joint at the sealed joint portion, in the joint hole Ch, and in the injection hole Ci.

  Next, in the go release step, after the filler filled in the filling step is solidified, the first and second bent frame members 1 and 2 that have been fastened and connected are released and the go fixation is released. To do. At this time, the joint contact portion 5 having a partial cylindrical shape has an equal elastic force in the circumferential direction, and thus is easily separated from the joint portion. Further, since the joint contact portion 5 is surrounded by being crushed by elastic deformation, the joint portion after the release of the surrounding does not have a large defect that requires joint repair.

  The present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the specific form of the present invention without departing from the spirit of the present invention.

It is an isometric view general view of the connection state of the PC member connector of Example 1 of this invention. FIG. 3 is an enlarged perspective view of the vicinity of a tightening connector 3 of the PC member connector of Example 1 in the connected state shown in FIG. 1. It is a perspective enlarged view of the bent part 4c vicinity of the PC member connector of Example 1 of the connection state shown in FIG. It is a top view of the PC member connector of Example 1 of the connection state shown in FIG. It is a front view of the PC member connector of Example 1 of the connection state shown in FIG. It is a rear view of the PC member connector of Example 1 of the connection state shown in FIG. It is a right view of the PC member connector of Example 1 of the connection state shown in FIG. It is a top view of the 1st bending frame material 1 which comprises the PC member connector of Example 1. FIG. It is AA sectional drawing of the 1st bending frame material 1 shown in FIG. FIG. 9 is a partially enlarged plan view of a bent portion 4c of the first bent frame member 1 shown in FIG. It is plane explanatory drawing of the folding mechanism 7 of the 1st bending frame material 1 shown in FIG. It is the isometric view explanatory drawing which looked at the expansion-contraction mechanism 6 of the 1st bending frame material 1 shown in FIG. 8 from the inner side. It is the isometric view explanatory drawing which looked at the expansion-contraction mechanism 6 of the 1st bending frame material 1 shown in FIG. 8 from the outer side. It is a top view of the 2nd bending frame material 2 which comprises the PC member connector of Example 1. FIG. It is plane explanatory drawing of the folding mechanism 7 of the 2nd bending frame material 2 shown in FIG. It is plane explanatory drawing which shows an surrounding process among the use states of the PC member connector of Example 1. FIG. It is front explanatory drawing which shows the use condition of the PC member connector of Example 1. FIG. It is a plane explanatory view showing the example of the use state of the conventional PC member joining jig.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st bending frame material 2 2nd bending frame material 3 Fastening connection tool 31 Locking tool 31b Rod 31n Locking piece 32 Locked tool 32h Insertion hole 4 Bending plate 41 Back plate 42 Side plate 4c Bending part 5 Joint Contact part 6 Telescopic mechanism 61 Fixing hole 62 Slide bar 63 Fixing nut 64 Slide plate 65 Additional contact part 7 Folding mechanism H Joint width C Precast concrete member S Spacer θ Bending angle ω Clearance angle

Claims (6)

  Of the periphery of the joint portion when joining the precast concrete member, the first bent frame material along the two adjacent surfaces and the second bend having the surface along the remaining two surfaces of the periphery of the joint portion. A PC member comprising a frame material, connecting the vicinity of each end of the first bent frame material and the second bent frame material, and surrounding a joint portion of two precast concrete members temporarily provided with a joint width therebetween It is a joining tool, and each of the connecting portions near both ends of the first bent frame member and the second bent frame member is provided with a tightening connector that fastens in the direction of the bent portion of the first bent frame member. Characteristic PC member connector.   Both the first and second bent frame members are bent along an L-shape so as to be along the joining portion, and fixed along the bent plate 4 and protruded so as to protrude toward the bending direction. The PC member connector according to claim 1, further comprising a joint contact portion made of an elastic body.   3. The PC member connector according to claim 1, wherein at least one of the first and second bent frame members includes an expansion / contraction mechanism that expands and contracts along a side around the bonding portion.   4. The PC member connector according to claim 1, wherein the first and second bent frame members can change at least one of a bent angle or a connecting angle when connected to another bent frame member.   The joint member for PC members according to claim 2, 3 or 4, wherein the joint contact portion is fixed to the bent plate in an exchangeable manner.   A PC member joining method using the PC member joint tool according to any one of claims 1, 2, 3, 4 or 5, wherein two precast concrete members are temporarily placed with a joint width therebetween, An enclosing step for enclosing and fixing the joint portion of the joint width by connecting a pair of PC member jointers, a joint filling step for filling the inner joint portion fixed with the enclosure with a filler, and after solidification of the filled filler A PC member joining method comprising: an enclosure releasing step of releasing the enclosure fixing of the PC member connector.

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