JP4235588B2 - Reinforcement tensioning device - Google Patents

Description

  The present invention relates to a tension device for a reinforcing material that reinforces the structure by affixing a reinforcing material made of a fiber material or a fiber reinforcing material to a sticking surface of the structure.

Conventionally, as a structure, for example, when reinforcing a concrete girder such as a bridge or an elevated road or a prestressed concrete girder later, a carbon fiber sheet as a reinforcing material is affixed to a pasting surface such as a lower surface of the girder. Thus, it has been considered to reinforce the girder (see, for example, Patent Document 1). That is, for this reinforcement, a tensioner 30 as shown in FIG. 12 was used. The tensioning device 30 includes a base 32 on which the carbon fiber sheet 31 is stretched, and a jack 33 that applies tension to the carbon fiber sheet 31 and holds the carbon fiber sheet 31 in a tensioned state. It was. The base 32 was composed of a first base member 34 provided with a guide hole 34a and a second base member 35 inserted and guided through the guide hole 34a so as to be slidable. And the jack 33 was attached so that the base members 34 and 35 might be connected. Here, the carbon fiber sheet 31 is passed between the base members 34 and 35, and the base members 34 and 35 are slid to each other by operating the jack 33 so that tension is applied to the carbon fiber sheet 31. Granted.
JP 2000-129929 A (paragraph number 0044, FIG. 11)

  By the way, in the conventional tensioning device 30, since the jack 33 for imparting tension to the reinforcing material is equipped, the overall weight of the tensioning device 30 becomes heavier, and this is applied to the attachment surface of the structure. There has been a problem that it may be difficult to handle in the work of deploying to address.

  The present invention has been made to solve the above-described conventional drawbacks. The purpose of the present invention is to apply a tensioning device to the sticking surface when the reinforcing material is tensioned and stuck to the sticking surface. Another object of the present invention is to provide a tensioning device for a reinforcing material that can facilitate the operation of deployment.

In order to achieve the above object, a tensioning device for reinforcing material according to the present invention has the following configuration. That is,
The tension device for a reinforcing material according to the first aspect of the present invention is a tension device for tensioning a reinforcing material made of a fiber material or a fiber reinforcing material, which is affixed to a sticking surface of a structure. The tension device includes a first support member that supports one end side of the reinforcing material, a second support member that supports the other end side of the reinforcing material, and the tension material to maintain a tensioned state. A tensioner having a holding member that holds a relative position between the first support member and the second support member, a tensioning base to which the tensioning tool is detachably attached, and the tensioning base provided on the tensioning base. One end of the first support member that supports one end of the reinforcing member and the second support member that supports the other end of the reinforcing member, or both of the first supporting member and the other end of the reinforcing member. And a tensioning means for tensioning the reinforcing material by moving the distance between them. And the said tension tool can be removed from the said tension stand in the state in which the said reinforcing material was tensioned.

  According to this, the reinforcing material is stretched on the tension tool such that one end side thereof is supported by the first support member and the other end side thereof is supported by the second support member. And in the state which supported the tension tool with the tension stand, either one or both of the first support member and the second support member of the tension tool are made of the reinforcing material by tension means such as a jack. If it moves so that the distance between one end side and the other end side may open, a reinforcement will be stretched and will be tense. Here, when the relative position between the first support member and the second support member is held by the holding member, the reinforcing material maintains a tensioned state. Thereby, even if it removes a tension tool from a tension stand, a reinforcing material can maintain a tension state. Therefore, when sticking the reinforcing material to the sticking surface of the structure, it is sufficient to deploy only the tensioner so as to be directed to the sticking surface. Moreover, since the tension tool does not include a tension means, it is lightweight.

  As in the reinforcing device tensioning device according to claim 2, in the reinforcing material tensioning device according to claim 1, the tensioning device is a frame that can extend in the same direction as the tensioning direction of the reinforcing material. It is desirable to consist of a body.

  Moreover, like the reinforcing device tension device according to claim 3, in the reinforcing material tension device according to claim 1 or 2, the second support member is a guide provided in the first support member. It is desirable that the first support member is guided by the member and is slidable in a direction parallel to the tension direction of the reinforcing material.

  Further, as in the reinforcing device tensioning device according to claim 4, in the reinforcing material tensioning device according to claim 3, the first support member is the other end of the reinforcing material. The tension means is attached to the tension table so as not to move in a direction approaching the side, and the tension means moves the second support member in a direction away from one end side of the reinforcement material to tension the reinforcement material. Is desirable. In this way, the tension tool is attached to the tension table so that the first support member does not move in the direction approaching the other end side of the reinforcement material, so the second support member is attached to the reinforcement material by the tension means. When moved in a direction away from the one end side, one end side of the reinforcing material is fixed and the other end side is pulled, and the reinforcing material is tensioned.

  Further, like the reinforcing device tensioning device according to the invention described in claim 5, in the reinforcing material tensioning device according to claim 4, the tensioning means includes a hooking member that is hooked on the second support member; In order to pull the second support member, it is desirable to comprise a moving device that moves the hook member in a direction away from one end side of the reinforcing member. In this manner, the hooking member that is hooked on the second support member is moved by the moving device so as to pull the second support member, whereby the reinforcing material is tensioned.

  Further, like the reinforcing device tensioning device according to the invention described in claim 6, the reinforcing material tensioning device according to any one of claims 3 to 5, wherein the first support member is the reinforcing material. A pair of extending members extending in a direction parallel to the tension direction, and a first fixing member that is spanned between the pair of extending members to connect both and is fixed to one end of the reinforcing member, The guide member is preferably constituted by the pair of extending members.

  Further, in the tensioning device for reinforcing material according to claim 6, like the tensioning device for reinforcing material according to claim 7, the extension member is provided with a first facing piece, and the first The second support member is provided with a second facing piece facing the first facing piece in the sliding direction, and the holding member holds a distance between the first facing piece and the second facing piece. Is desirable. Thus, the distance between the first opposing piece provided on the extending member of the first supporting member and the second opposing piece provided on the second supporting member is held by the holding member, whereby the first supporting member and the second supporting piece are held. The relative position with respect to the support member is maintained.

  Further, in the reinforcing device tensioning device according to claim 7, as in the reinforcing material tensioning device according to the invention according to claim 8, the holding member is formed of the first facing piece or the second facing piece. Either one is formed of a male screw member provided so as to be movable in a direction parallel to the extending direction of the extending member by a turning operation, and the male screw member is moved by the turning operation. It is desirable to have an abutting portion that abuts either the opposing piece or the second opposing piece. Thus, when the male screw member provided on either the first opposing piece or the second opposing piece is turned, the male screw member moves in a direction parallel to the extending direction of the extending member. Then, as the male screw member moves, the contact portion of the male screw member comes into contact with either the first opposing piece or the second opposing piece, so the first opposing piece and the second opposing piece And the interval is maintained.

  According to the reinforcing device tensioning device of the present invention, the tensioning device can be separated from the tensioning base in a state where the reinforcing material is tensioned, and the weight of the tensioning device can be reduced. When the reinforcing material is applied with tension, the tensioning tool is arranged so as to be attached to the application surface.

  Hereinafter, the best mode for carrying out the tension device for a reinforcing material according to the present invention will be described with reference to the drawings.

  FIG. 1 thru | or FIG. 9 shows one Embodiment of the tension | tensile_strength apparatus of the reinforcing material which concerns on this invention. Reference numeral 1 in the figure denotes a sticking surface Sa of a concrete floor slab S such as a bridge or an elevated road as a structure to be reinforced (in the illustrated embodiment, the sticking surface Sa is a floor slab. It is a PBO (polyparaphenylene benzobisoxazole) fiber sheet as a reinforcing material made of a fiber material that is affixed to the lower surface of S. 2 is a tensioning device for tensioning the PBO fiber sheet 1.

  The tension device 2 includes a tension frame 3 as a tension tool, a tension table 4, and tension means 5. The tension frame 3 is composed of a frame body (in the illustrated embodiment, a frame body having a substantially rectangular shape in plan view) that can be extended in the same direction as the tension direction of the PBO fiber sheet 1, and the one end 1 a side of the PBO fiber sheet 1. The first frame member 6 as the first support member, the second frame member 7 as the second support member that supports the other end 1b side of the PBO fiber sheet 1, and the PBO fiber sheet 1 are in tension. In order to maintain this state, holding members 8 and 8 that hold the relative positions of the first frame member 6 and the second frame member 7 are provided. The tension stand 4 is one to which the tension frame 3 is detachably attached. The tension means 5 is provided on the tension table 4 and supports the first frame member 6 supporting the one end 1 a side of the PBO fiber sheet 1 and the second frame member supporting the other end 1 b side of the PBO fiber sheet 1. 7 or 7 is moved so that the distance between the one end 1a side and the other end 1b side of the PBO fiber sheet 1 is increased, and the PBO fiber sheet 1 is tensioned. (In the illustrated embodiment, the tensioning means 5 moves the second frame member 7 in the direction in which the other end 1b side of the PBO fiber sheet 1 is away from the one end 1a side, thereby tensioning the PBO fiber sheet 1. is there.).

  The first frame member 6 includes guide members 9 and 9 that guide the second frame member 7. Specifically, the first frame member 6 extends in a direction parallel to the tension direction of the PBO fiber sheet 1 and constitutes the guide members 9 and 9 and a pair of extending members 10 and 10 positioned in parallel, and the pair. The first fixing member 11 extends between the extending members 10 and 10 to connect the two extending members 10 and 10 and fixes one end 1a of the PBO fiber sheet 1. And the 1st opposing pieces 12 and 12 are each provided in the other edge part which the extending members 10 and 10 mention later. Further, in the illustrated embodiment, in order to reinforce the first frame member 6, there is provided a connecting reinforcing material 6a that is spanned between the pair of extending members 10 and 10 and connects the two. At the other end of the material 10, there are provided regulating members 13, 13 for regulating the movement of the guide plates 14, 14 of the second frame member 7 in the vertical direction, which will be described later.

  The extending member 10 is made of, for example, a grooved steel and includes an upper wall 10a, a lower wall 10b, and a side wall 10c. The pair of extending members 10 and 10 are arranged in parallel so that the side walls 10c and 10c face each other apart from each other. The first fixing member 11 is fixed at one end of the extending members 10 and 10 so as to be spanned between them. Specifically, the first fixing member 11 includes fixing plates 11a and 11a fixed to the side walls 10c and 10c of the extending members 10 and 10 by bolts B1 and B1 and nuts N1 and N1, and the fixing plates 11a and 11a. The upper and lower first plates 11b and 11b are fixed to the upper and lower ends of the fixing plates 11a and 11a by bolting or the like, and the tip surfaces of the first plates 11b and 11b are fixed by bolting or the like. The second plate 11c and the third plate 11d provided as a reinforcing plate between the first plates 11b and 11b. Fixing plates 11e and 11e that are supported by sandwiching the one end 1a side of the PBO fiber sheet 1 are attached to the second plate 11c by, for example, bolting. Further, on the upper surface of the upper first plate 11c, a deflection member 11f that changes the extending direction of the PBO fiber sheet 1 (bending the extending direction of the PBO fiber sheet 1 by 90 degrees in the illustrated embodiment) is bolted or the like. It is fixed by.

  The connection reinforcing material 6a is fixed so as to be spanned between the extension members 10 and 10 at the intermediate portion. Specifically, the connecting reinforcing member 6a is fixed to the side walls 10c and 10c of the extending members 10 and 10 by bolts B3 and B3 and nuts N3 and N3, for example, mounting pieces 6b and 6b made of L-shaped steel, It consists of a connecting member 6c made of, for example, grooved steel, which is fixed by bolting or the like so as to connect the mounting pieces 6b, 6b.

  The regulating member 13 includes an upper plate 13a, a lower plate 13b, and a reinforcing member 13c. The upper plate 13a has a rectangular shape wider than the width dimension of the upper wall 10a, and the other end of the extending member 10, that is, the end on the side where the first fixing member 11 is not fixed (PBO fiber sheet). 1 is attached to the upper surface of the upper wall 10a at the other end 1b side by bolts B2, B2 and nuts N2, N2. The lower plate 13b has a rectangular shape wider than the width of the lower wall 10b, and the other end of the extending member 10, that is, the end (PBO fiber) on the side where the first fixing member 11 is not fixed. It is attached to the lower surface of the lower wall 10b at the other end 1b side of the sheet 1 by bolts B2, B2 and nuts N2, N2. Here, the side edge portions of the upper plate 13a and the lower plate 13b protrude sideward from the side wall 10c of the extending member 10, and the protruding portions of the guide plate 14 described later of the second frame member 7 are provided. Abutting with the upper and lower ends, the movement of the second frame member 7 in the vertical direction is restricted. Further, the reinforcing member 13c is formed in, for example, an I-shaped longitudinal section, and is fitted in the groove of the extending member 10, and bolts B2, B2 and nuts N2 on the lower surface of the upper wall 10a and the upper surface of the lower wall 10b, It is attached by N2. Further, the reinforcing member 13c is formed with a through hole 13h into which a male screw member 17 described later as the holding member 8 can be inserted.

  The first facing piece 12 is formed in a rectangular shape so as to have a width dimension substantially the same as the width dimension of the extending member 10, and is bolted to the tip portions of the upper plate 13 a and the lower plate 13 b of the regulating member 13. It is fixed by. Here, the first opposing piece 12 is formed with a through hole 12a into which a male screw member 17 described later as the holding member 8 can be inserted, and a nut N into which the male screw member 17 is screwed is formed in the through hole 12a. It is fixed by welding or the like so as to communicate with.

  The second frame member 7 is guided by the guide members 9 and 9 (in the illustrated embodiment, the pair of extending members 10 and 10) provided in the first frame member 6, The PBO fiber sheet 1 is slidable in a direction parallel to the tension direction. The second frame member 7 is provided with second facing pieces 16 and 16 facing the first facing pieces 12 and 12 in the sliding direction. In the illustrated embodiment, the second frame member 7 includes a pair of guide plates 14, 14 slidably contacting the side walls 10 c, 10 c of the pair of extending members 10, 10 constituting the guide members 9, 9. The second fixing member 15 is provided between the pair of guide plates 14 and 14 so as to connect both of them and to fix the other end 1b side of the PBO fiber sheet 1. The second fixing member 15 includes two upper and lower fourth plates 15a and 15a which are fixed to the upper and lower ends of the guide plates 14 and 14 by bolting so as to connect the guide plates 14 and 14, and the fourth plates 15a and 15a. The plate includes a fifth plate 15b that is fixed to the front ends of the plates 15a and 15a by bolting or the like, and a sixth plate 15c that is provided as a reinforcing plate between the fourth plates 15a and 15a. Then, fixing plates 15d and 15d that are supported by sandwiching the other end 1b side of the PBO fiber sheet 1 are attached to the fifth plate 15b by, for example, bolting. Further, on the upper surface of the upper fourth plate 15a, a deflection member 15e that changes the extending direction of the PBO fiber sheet 1 (bending the extending direction of the PBO fiber sheet 1 by 90 degrees in the illustrated embodiment) is bolted or the like. It is fixed by. In the illustrated embodiment, both end portions of the fifth plate 15b are second opposing pieces 16 and 16, respectively.

  The holding member 8 holds the relative position between the first frame member 6 and the second frame member 7 by holding the distance between the first opposed piece 12 and the second opposed piece 16. Specifically, the holding member 8 is extended to one of the first facing piece 12 and the second facing piece 16 (the first facing piece 12 in the illustrated embodiment) by the rotation operation. The male screw member 17 is provided so as to be movable in a direction parallel to the direction. The male screw member 17 is in contact with either the first opposing piece 12 or the second opposing piece 16 (the second opposing piece 16 in the illustrated embodiment) when moved by a turning operation. A contact portion 17a is provided. More specifically, the holding member 8 (the male screw member 17) includes a bolt B that is screwed with a nut N fixed to the first opposing piece 12, and advances and retracts toward the second opposing piece 16 by a turning operation. Moving. The head portion Ba of the bolt B serves as the contact portion 17a, and contacts the second opposing piece 16 when the bolt B advances toward the second opposing piece 16.

  The tension base 4 is detachable from the tension base 4 so that the tension base body 4a and the tension frame 3 do not move in a direction in which the first frame member 6 approaches the other end 1b side of the PBO fiber sheet 1. A first mounting portion 4b for mounting and a second mounting portion 4c for mounting a moving device 19 described later as the tension means 5 are provided. The tension stand main body 4a is made of, for example, a section steel such as an H-section steel, and the first attachment portion 4b and the second attachment portion 4c are attached to the upper surface of the tension stand main body 4a in the longitudinal direction. For example, a plurality of (two in the illustrated embodiment) shaped steel made of square steel or the like are mounted on the front and rear in the longitudinal direction by welding or the like so as to extend in the width direction. ing. Here, the first attachment portion 4b includes a first base plate 4i that is attached to the tension base body 4a by bolting or the like, and a second base plate 4j that is attached to the upper surfaces of both side portions of the first base plate 4i so as to stand up by welding or the like. 4j. Then, the tension frame 3 is placed so that the connection reinforcing member 6a of the first frame member 6 is in contact with the first mounting portion 4b (specifically, the second base plates 4j and 4j of the first mounting portion 4b). When placed on the parts 4d and 4d, even if the first frame member 6 is moved in a direction approaching the other end 1b side of the PBO fiber sheet 1, the connection reinforcing material 6a and the first attachment part 4b come into contact with each other. So it doesn't move in that direction. That is, the tension frame 3 is merely placed on the placement portions 4d and 4d of the tension table 4, so that the first frame member 6 does not move in the direction approaching the other end 1b side of the PBO fiber sheet 1, It will be attached to the tension table 4. On the other hand, similarly to the first mounting portion 4b, the second mounting portion 4c rises to the upper surface of the intermediate portion of the first base plate 4i and the first base plate 4i, which is mounted to the tension base body 4a by bolting or the like. The second base plates 4j and 4j are attached.

  The tension means 5 includes a second frame member 7, specifically, a hook member 18 that is hooked on the fourth plate 15 a on the upper side of the second fixing member 15, and the hook member 18 in order to pull the second frame member 7. The moving device 19 moves in a direction away from the one end 1a side of the fiber sheet 1, that is, in a direction away from the first fixing member 11 to which the one end 1a side of the PBO fiber sheet 1 is fixed. Specifically, the hook member 18 has two rod-shaped flange members 18a and 18a each having a distal end side bent and formed with a male threaded portion on the proximal end side, and these flange members 18a and 18a are arranged on the left and right. It comprises an attachment portion 18b that is attached and fixed. The attachment portion 18b includes, for example, two upper and lower section steels 18c and 18c made of groove steel or the like, reinforcing plates 18d and 18d, and a connecting plate 18e. Here, the shape steels 18c and 18c are arranged so that their back sides are slightly apart and face each other vertically, and the connection plate 18e is fixed by welding or the like so as to connect the shape steels 18c and 18c. . Further, the reinforcing plates 18d and 18d are fixed by welding or the like in the grooves 18 and 18c in order to reinforce the steel bars 18c and 18c. And, by inserting the base end portion of the flange members 18a, 18a into the gap K formed between the two shape steels 18c, 18c, and screwing the nuts 18f, 18f into the male screw portion, The eaves members 18a and 18a are fastened and fixed to the mounting portion 18b. On the other hand, the moving device 19 includes a jack 19a such as a hydraulic jack, and is fixed to the second mounting portion 4c by bolting or welding. The mounting portion 18b is fixed to the flange portion 19c attached to the tip end portion of the ram 19b of the jack 19a by means of screws or the like by bolting or welding via the connecting plate 18e. Has been.

  Next, an operation procedure for tensioning the PBO fiber sheet 1 using the tensioning device 2 configured as described above and pasting it on the pasting surface Sa will be described.

  First, the PBO fiber sheet 1 is stretched on the tension frame 3. Specifically, both ends 1a and 1b of the PBO fiber sheet 1 are stopped by being sandwiched between the fixing plates 11e, 11e and 15d and 15d, and the fixing plates 11e and 11e are fixed to the first fixing member 11 (second plate 11c). 15d and 15d are attached to the second fixing member 15 (fifth plate 15b). Then, the tension frame 3 on which the PBO fiber sheet 1 is stretched is attached so as to be placed on the tension table 4. At this time, the tension frame 3 is arranged on the tension table 4 so that the connection reinforcing material 6a of the first frame member 6 is in contact with the first attachment portion 4b. (See FIG. 4). In addition, either the operation | work which stretches the PBO fiber sheet 1 to the tension frame 3, and the operation | work which attaches the tension frame 3 to the tension stand 4 may be performed previously. That is, first, the tension frame 3 may be attached to the tension table 4, and then the PBO fiber sheet 1 may be stretched on the tension frame 3.

  Next, the hook member 18 (specifically, the flange members 18a and 18a) constituting the tensioning means 5 is hooked so as to be hooked on the second frame member 7 of the tension frame 3, and the jack 19a constituting the tension means 5 is used. When the (moving device 19) is operated so as to extend the ram 19b, the second frame member 7 is pulled through the hook member 18. That is, the other end 1b side of the PBO fiber sheet 1 is pulled, and the PBO fiber sheet 1 is tensioned. Here, the ram 19b is extended until a required tension is applied to the PBO fiber sheet 1. At this time, since the second opposing pieces 16 and 16 are separated from the first opposing pieces 12 and 12, the bolts B and B are rotated so as to advance toward the second opposing pieces 16 and 16 by the distance. To do. As a result, the heads Ba, Ba of the bolts B, B come into contact with the second facing pieces 16, 16, so that the distance between the first facing pieces 12, 12 and the second facing pieces 16, 16 is maintained. The relative position between the first frame member 6 and the second frame member 7 is maintained, and the tensioned state of the PBO fiber sheet 1 is maintained (see FIGS. 6 and 7). Thereafter, the jack 19a is operated to operate the ram 19b to be contracted to release the engagement between the hook member 18 (specifically, the hook members 18a and 18a) and the second frame member 7, and the tension frame 3 Is removed from the tension table 4. In this way, the tension frame 3 is removed from the tension base 4 in a state where the PBO fiber sheet 1 is tensioned.

  Then, an adhesive such as an epoxy adhesive is applied to the PBO fiber sheet 1 and / or the affixing surface Sa of the floor slab S, and the tension frame 3 is arranged and held so as to reach the affixing surface Sa of the floor slab S. . Here, in order to arrange and hold the tension frame 3 on the lower surface of the floor slab S, for example, as shown in FIGS. 8 and 9, anchor metal fittings A1 and A1 are attached to the lower surface of the floor slab S, and the anchor metal fittings are attached. Supports A2 and A2 for supporting the tension frame 3 from below may be attached to A1 and A1. Specifically, the anchor metal fittings A1 and A1 are provided with a female screw on the inner peripheral surface thereof, and are fixed to a hole opened on the lower surface of the floor slab S using an adhesive or the like. The support tool A2 is attached to the anchor metal fittings A1 and A1 by means such as screwing, and a pair of rods A3 and A3 provided with male screws on the outer peripheral portion such as all screw bolts, and the pair of rods A3 and A3. A support material A4 (in the illustrated embodiment, the support material A4 is composed of two grooved steels A5 and A5, and is arranged so that their back sides are slightly separated from each other); It consists of nuts A6 and A6 that are tightened from below the bars A2 and A2. Then, the rods A3 and A3 are attached to the anchors A1 and A1, the lower ends thereof are inserted between the grooved steels A5 and A5, and the nuts A6 and A6 are screwed together so that the tension frame 3 is Supported to be pushed up. But the method of arrange | positioning and hold | maintaining the tension | tensile_strength frame 3 on the lower surface of the floor slab 3 is not restricted to the said method.

  Thereafter, the PBO fiber sheet 1 is brought into close contact with the pasting surface Sa and cured until the adhesive reaches a predetermined strength. Here, in order to adhere the PBO fiber sheet 1 to the pasting surface Sa, for example, an airbag film is provided so as to cover the PBO fiber sheet 1 from below, and the peripheral portion of the airbag film is disposed on the lower surface of the floor slab S. A method in which the PBO fiber sheet 1 is brought into close contact with the atmospheric pressure by sucking the air between the airbag film and the floor slab S with a vacuum pump is preferable. After the adhesive is cured, both ends of the PBO fiber sheet 1 are cut and the tension frame 3 is removed from the floor slab S. Thus, the PBO fiber sheet 1 is affixed to the affixing surface Sa of the floor slab S in a tensioned state. In addition, before or after cutting both ends of the PBO fiber sheet 1, a plate is applied from below the both ends of the PBO fiber sheet 1, and the plate is fixed to the lower surface of the floor slab S with an anchor or the like. May be. By carrying out like this, it can prevent that the both ends of the said PBO fiber sheet 1 peel from the sticking surface Sa.

  Next, the effect of the tension device 2 shown in this embodiment will be described. The PBO fiber sheet 1 is supported by the first frame member 6 so that one end 1 a side thereof is fixed to the first fixing member 11, and the second end 1 b side is fixed to the second fixing member 15. Supported by the frame member 7 and stretched to the tension frame 3. Then, with the tension frame 3 attached to the tension table 4, the jack 19a constituting the tension means 5 is operated to extend the ram 19b, and the second end 1b side of the PBO fiber sheet 1 is fixed. The frame member 7 is pulled through the hook member 18. At this time, the first frame member 6 to which the one end 1a side of the PBO fiber sheet 1 is fixed is in contact with the first attachment portion 4a of the tension base 4 so that the connection reinforcing material 6a faces the other. Since it cannot move in the direction approaching the end 1b side, the second frame member 7 is guided by the guide member 9 (extension members 10, 10) of the first frame member 6 by being pulled by the jack 19a. The first frame member 6 is slid and moved (here, the extension members 10 and 10 are provided with the regulating members 13 and 13 so that the second frame member 7 is moved in the vertical direction). Is regulated and can slide smoothly.) Therefore, the distance between the one end 1a side and the other end 1b side of the PBO fiber sheet 1 is increased, and the PBO fiber sheet 1 is stretched and tensioned.

  Then, in a state in which the PBO fiber sheet 1 is tensioned by the tensioning means 5, the bolts B and B as the holding members 8 and 8 provided on the first facing pieces 12 and 12 are rotated, and the second facing piece When the heads Ba and Ba are brought into contact with the second opposing pieces 16 and 16, the distance between the first opposing pieces 12 and 12 and the second opposing pieces 16 and 16 is maintained. Since the relative positions of the first frame member 6 and the second frame member 7 are maintained, the tensioned state of the PBO fiber sheet 1 can be maintained. Thereby, even if it removes the tension | tensile_strength frame 3 from the tension stand 4, the PBO fiber sheet 1 can maintain a tension | tensile_strength state. That is, the tension frame 3 can be removed from the tension stand 4 in a state where the PBO fiber sheet 1 is tensioned. Therefore, when affixing the PBO fiber sheet 1 to the application surface Sa of the floor slab S in a tensioned state, the tension frame 3 is removed from the tension table 4 and only the tension frame 3 is applied to the application surface Sa. Should be deployed. At this time, since the tension frame 3 does not include the tension means 5 (jack 19a), the tension frame 3 is lightweight, and the work of arranging the tension frame 3 so as to be directed to the pasting surface Sa becomes easy.

  Moreover, since the tension | tensile_strength frame 3 can be removed from the tension stand 4 in the state in which the PBO fiber sheet 1 was tension | tensile_strength as mentioned above, the operation | work which tensions the PBO fiber sheet 1 and the PBO fiber sheet 1 on the application surface Sa It is possible to perform the work of pasting on the paper independently. Therefore, for example, it is possible to perform the work of tensioning the PBO fiber sheet 1 in advance in the factory, transport only the tension frame 3 to the site, and attach the PBO fiber sheet 1. Alternatively, if the tensioning table 4 and the tensioning means 5 are transported to the site, it is possible to perform a tensioning operation on the site, and in this case, a plurality of tension frames 3 are used to apply the tensioning table 3 to the application surface Sa. The work and the tension work of the PBO fiber sheet 1 to be attached next can be performed in parallel.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the affixing surface Sa may not be the lower surface of the floor slab S, but may be a side surface or an upper surface. The structure to be reinforced is not limited to the floor slab S, but may be a pier, a girder, a beam, a pillar, or other concrete structure, and is not limited to a concrete structure, For example, a steel structure may be used.

  Further, the reinforcing material made of the fiber material may not be the PBO fiber sheet 1 but may be a fiber sheet such as carbon fiber, glass fiber, and aramid fiber. The reinforcing material may not be made of a fiber material but may be made of a fiber reinforcing material such as PBO fiber reinforced plastic, glass fiber reinforced plastic, and other fiber reinforced plastic.

  Further, the male screw member 17 (bolt B) as the holding member 8 does not need to be provided on the first opposing piece 12 and may be provided on the second opposing piece 16. In this case, when the bolt B as the holding member 8 advances toward the first opposing piece 12 by a turning operation, the head Ba abuts against the first opposing piece 12.

  Further, as shown in FIG. 10, the holding member 8 has a male screw rod 20 a whose one end is fixed to the second facing piece 16 by welding or the like and whose other end is inserted into the through hole 12 a of the first facing piece 12. The nut 20b may be screwed into the male screw rod 20a and moved in the axial direction of the male screw rod 20a, that is, in a direction parallel to the extending direction of the extending member 10. According to this, when the nut 20b is rotated and the nut 21 is advanced toward the first opposing piece 12 and brought into contact with the first opposing piece 12, the first opposing piece 12 and the second opposing piece The distance from 16 is held. The male threaded rod 20a may be welded to the first opposing piece 12 instead of the second opposing piece 16. In this case, the nut 20b is advanced toward the second opposing piece 16, and the second opposing piece By abutting on 16, the distance between the first facing piece 12 and the second facing piece 16 is maintained.

  Further, as shown in FIG. 11, the holding member 8 has a male screw rod 21a inserted between the first opposed piece 12 and the second opposed piece 16, and is screwed into the male screw rod 21a so as to have its shaft. It may consist of a plurality of nuts 21b, 21b movable in the center direction. According to this, by rotating the nuts 21b and 21b and bringing them into contact with the first facing piece 12 and the second facing piece 16, respectively, the interval between the first facing piece 12 and the second facing piece 16 is increased. Can be held.

  Furthermore, the holding member 8 should just be able to hold | maintain the relative position of the 1st frame member 6 and the 2nd frame member 7, for example, the side wall of the extending material 10 which comprises a part of 1st frame member 6 10c and each of the guide plates 14 constituting a part of the second frame member 7 are provided with through holes communicating with each other, and bolts are inserted into the through holes and nuts are screwed together. The frame member 6 and the second frame member 7 may be fixed.

  Further, the tension means 5 is not limited to moving the second frame member 7 away from the first frame member 6 as in the illustrated embodiment, but separates the first frame member 6 from the second frame member 7. The first frame member 6 and the second frame member 7 may be moved in a direction away from each other, or the tension means 5 may be specified. Of course, the configuration is not limited to that illustrated.

It is a front view which shows one Embodiment of the tension | tensile_strength apparatus of the reinforcing material which concerns on this invention. Similarly, it is a principal part enlarged front view. Similarly, it is a plan view. Similarly, it is a principal part enlarged plan view. Similarly, it is an expanded sectional view by the AA line in FIG. Similarly, it is a principal part enlarged front view which shows the state which strained the reinforcing material. Similarly, it is a principal part enlarged plan view which shows the state which strained the reinforcing material. Similarly, it is a front view at the time of sticking a reinforcing material on the sticking surface of a structure. Similarly, it is an expanded sectional view by the BB line in FIG. FIG. 6 is a view corresponding to FIG. 5, showing a modification of the holding member of the tensioning device for a reinforcing material according to the present invention. FIG. 6 is a view corresponding to FIG. 5 and showing another modified example of the holding member of the tension device for a reinforcing material according to the present invention. It is a front view which shows the conventional tension tool.

Explanation of symbols

1 PBO fiber sheet (reinforcing material)
2 Tensioning device 3 Tension frame (tensioner)
4 Tension table 5 Tensioning means 6 First frame member (first support member) 7 Second frame member (second support member)
DESCRIPTION OF SYMBOLS 8 Holding member 9 Guide member 10 Extension member 11 1st fixing member 12 1st opposing piece 16 2nd opposing piece 17 Male screw member 17a Contact part 18 Hooking member 19 Moving apparatus

Claims (8)

A tensioning device for tensioning a reinforcing material made of a fiber material or a fiber reinforcing material, which is affixed to a bonding surface of a structure,
A first support member that supports one end side of the reinforcing material; a second support member that supports the other end side of the reinforcing material; and the first support member to maintain a tensioned state of the tension material; A tensioning member having a holding member that holds a relative position with respect to the second support member;
A tension stand to which the tension tool is detachably attached,
One of the first support member that supports one end side of the reinforcing material and the second support member that supports the other end side of the reinforcing material, or both, A tension means for moving the reinforcement material so that a distance between the one end side and the other end side is opened and tensioning the reinforcement material;
The tensioning device for a reinforcing material, wherein the tensioning device is removable from the tensioning base in a state where the reinforcing material is tensioned.   The tension device for a reinforcing material according to claim 1, wherein the tensioning device includes a frame body that can extend in the same direction as the tensioning direction of the reinforcing material.   The second support member is guided by a guide member included in the first support member, and is slidable in a direction parallel to a tension direction of the reinforcing material with respect to the first support member. The tension device for a reinforcing material according to claim 1 or 2. The tensioning device is attached to the tensioning base so that the first support member does not move in a direction approaching the other end side of the reinforcing material,
The tension device for a reinforcing material according to claim 3, wherein the tensioning means moves the second support member in a direction away from one end side of the reinforcing material to tension the reinforcing material.   The tension means includes a hook member that is hooked on the second support member, and a moving device that moves the hook member in a direction away from one end side of the reinforcing member to pull the second support member. The tension device for reinforcing material according to claim 4. The first support member is connected to the pair of extending members extending in a direction parallel to the tension direction of the reinforcing member and the pair of extending members, and one end side of the reinforcing member is fixed. A first fixing member to be made,
The tension member for reinforcing material according to any one of claims 3 to 5, wherein the guide member is constituted by the pair of extending members. The extending material is provided with a first facing piece,
The second support member is provided with a second facing piece facing the first facing piece on the sliding direction,
The reinforcing member tensioning device according to claim 6, wherein the holding member holds an interval between the first facing piece and the second facing piece. The holding member is a male screw member provided on either the first facing piece or the second facing piece so as to be movable in a direction parallel to the extending direction of the extending member by a turning operation.
The reinforcement according to claim 7, wherein the male screw member has an abutting portion that abuts against either the first opposing piece or the second opposing piece when moved by a rotation operation. Timber tension device.

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