WO2018235950A1

WO2018235950A1 - Fixing device for reinforcing bars to cross

Info

Publication number: WO2018235950A1
Application number: PCT/JP2018/023853
Authority: WO
Inventors: 清服部; 孝夫川口
Original assignee: 岐阜スチール株式会社
Priority date: 2017-06-23
Filing date: 2018-06-22
Publication date: 2018-12-27
Also published as: JP6550614B2; JP2019007319A

Abstract

Provided is a fixing device for reinforcing bars that can efficiently and easily fix reinforcing bars to cross using a special fixing metal fitting. A fixing device is a device that uses a fixing metal fitting comprising an insertion groove and a pair of holding units 110 and to cross a reinforcing bar 200 held in the holding units with a reinforcing bar inserted into the insertion groove and fix same, and is configured so that in a pressure-fitting mechanism having, as primary constituent elements, a receiving member 10 on which both the reinforcing bar 200 and the fixing metal fitting can be disposed, a pressing member holder 20 on which a pressing member 21 that can be inserted and removed and for which a projecting force has been applied with a cushion is disposed, and a hook-shaped pressure-fitting member 30, the pressing member holder 20 and the hook-shaped pressure-fitting member 30 are mutually engaged by the drive force from a drive transmission member 60 via a link mechanism, the distal end face 24 of the pressing member 21 is pressed by the distal end of the hook-shaped pressure-fitting member 30 during pressure-fitting of the holding unit 110 by the pressing member 21 and the hook-shaped pressure-fitting member 30, the pressing member 21 is pressed into the pressing member holder 20, thereby completing pressure-fitting fixation work.

Description

Fixing device for intersecting reinforcing bars

The present invention relates to a fixing device for intersecting reinforcing bars in the assembly of reinforcing bars used in reinforced concrete structures and the like, and relates to a caulking apparatus for fixing brackets used for fixing.

In general, in assembling reinforcing bars of a reinforced concrete structure, in order to fix the reinforcing bars by crossing them like the main bars and the shear reinforcing bars, winding number wires and tying them together or welding the reinforcing bars to each other is performed. However, wire bonding and welding require skill and skill, and it takes time and effort.

As a metal fitting which can be made to cross and fix reinforcing bars without requiring skilled techniques in place of such binding and welding, inserting and holding the insertion groove for inserting one reinforcing bar and the other reinforcing bar There has been proposed a metal fixture for fixing reinforcing bars consisting of a pair of grips (see Patent Document 1).

In this fixing bracket, the tip of the holding side portion of the holding portion provided in the groove side surface of the insertion groove has a specific structure, and the other end is pushed and fixed to the receiving portion formed at one end. By fixing the reinforcing bars by inserting and holding the reinforcing bars to be cross-fixed in the insertion groove and the grip, respectively, and then caulking and fixing the tip of the grip side of this specific structure, It is a metal fitting that firmly fixes intersecting bars. The caulking operation process of the grip side portion in this fixing bracket is schematically shown in FIG. 13. In this example, one end of the facing grip side portion is formed in a V-shaped receiving portion, and the other end is L-shaped The tip is pressed into the receiving part and fixed by caulking. Although the steps of this fixing operation are performed according to steps a to e, it is necessary to provide an apparatus capable of surely and efficiently performing this step.

In caulking and fixing work in steps a to e, first, in step a, the reinforcing bar 200 is set to the grip bottom portion 111 of the grip portion 110, and then in step b, a pressing force is applied in the direction of arrow A to hold one grip side portion Press 114 against the rebar 200. Further, a pressing force is applied in the A direction, and the tip end portion 115 of the grip side portion 114 is brought close to the receiving portion 113 formed at the tip end portion of the other grip side portion 112 and made pushable (step c). Next, a pressing force is applied in the direction of arrow B to press the tip portion 115 into the receiving portion 113, and both are crimped and fixed to form a crimped portion 150 (steps c, d, e). In this process, the pressing force in the A direction needs to be maintained without interfering with the pressing force in the B direction until the receiving portion 113 and the tip end portion 153 of the gripping portion are crimped and fixed by the pressing force in the B direction. There is a need for a locking device that provides such work operations.

Registered Utility Model No. 3200075

An object of the present invention is to provide a reinforcing bar fixing device capable of easily and efficiently fixing intersecting reinforcing bars using a fixing bracket capable of firmly fixing the intersecting reinforcing bars as described above without requiring skilled techniques. It is.

Rebar fixing device that solves the above problems is
The insertion groove and the pair of grip portions, the insertion groove includes the groove bottom portion and the facing groove side portion extended from the groove bottom portion, and the upper end of the center of each facing groove side portion Is provided with a pair of grips, the grips comprising a grip bottom and a facing grip side extending from the grip bottom, the pair of grips being arranged to be able to communicate with and rebar reinforcement The end of one side of the grip side is fixed to the rebar inserted in the insertion groove and the grip using a fixing bracket formed so as to be capable of receiving and caulking the end of the other side of the grip. A device that crosses and fixes the gripped rebar,
A receiving material capable of arranging the reinforcing bar inserted in the insertion groove and the reinforcing bar gripped in the grip together with the fixing bracket, and the cushion capable of entering and exiting with a projecting force, and the tip surface is formed in a slope A caulking mechanism section having a pressing material holder on which a pressing material is installed and a hook-like caulking member as main components is juxtaposed in two rows with an interval allowing insertion of the insertion groove,
In each caulking mechanism part, the pressing material holder and the hook-like caulking member sandwich the receiving material, and are rotatably mounted on the same rotation shaft, and are driven by the driving force from the driving device via the link mechanism. By rotating and engaging with each other, the pressing material presses the other gripping side surface portion against the reinforcing bar, and the tip end of the other gripping side surface portion is moved to the vicinity of the tip end portion of one gripping side surface portion
Then, while the hook-like caulking member caulks and fixes the tips of both gripping side parts, the tip face of the pressing material is pressed by the tip of the hook-like caulking member, and the pressing material is pushed into the pressing material holder and caulking fixed It is characterized in that it is configured to be able to complete the operation.

In the above-described fixing device, two rows of caulking mechanisms including a receiving material, a pressing material holder and a hook-like caulking portion as main components are juxtaposed, and the gap between the two rows can be inserted into the insertion groove of the fixing bracket. The insertion grooves can be inserted together with the reinforcing bars inserted into the gap, and the tip end portions of the gripping side portions of the pair of gripping portions can be simultaneously crimped and fixed, and the reinforcing bars gripped in the gripping portions can be fixed. Then, the reinforcing bar inserted into the insertion groove may be pressed and fixed to the groove bottom of the insertion groove by the reinforcing bars gripped and crimped and fixed by the pair of gripping portions, and the both reinforcing bars may cross and be fixed it can.

The work operation of the pressing force in the A direction and the pressing force in the B direction in the caulking work steps c, d and e of FIG. 13 is also performed along with the progress of the interlocking movement of the pressing material holder and the hook-like caulking member. The pressing member performs the operation operation of the pressing force in the A direction, the hook-like caulking member performs the operation operation in the B direction, and the caulking member performs the operation operation in which the pressing member can be pushed into the pressing holder to complete the operation process. be able to.

Further, in the above fixing device, the cushion is an air cushion, and the driving device is preferably a hydraulic device, and hooks for fixing the device to the reinforcing bars on both outer sides of the caulking mechanism juxtaposed in two rows. It is preferred that a second device fixing member is provided. Furthermore, it is preferable that the outer surface of the fixing device is rotatably attached to the support column, and the direction of the device can be adjusted according to the fixing point of the reinforcing bar.

By using the air cushion, the balance between the operation of pressing the pressing side portion against the reinforcing bar and the operation of being pushed into the pressing member holder is improved, and by using the hydraulic device, the pressing holder and the hook-like caulking member mutually The occlusal movement of the holder is smooth, and the pushing operation of the pressing member, which is biased with a projecting force, into the holder is also smooth. This enables the caulking and fixing operation to proceed smoothly.

In the device of the present invention, it is preferable to hold the main bar in the grip portion and insert a shear reinforcing bar into the insertion groove to fix the reinforcing bar. In addition, a shear reinforcing bar is a reinforcing bar that is used to cross a main bar, and indicates a reinforcing bar called a hoop bar or a band bar in the case of a column, and a bar or a stirrup in the case of a beam. . Then, by providing the above-mentioned hook-like device fixing member in the fixing device, the fixing device can be firmly fixed to the fixing portion of the rebar held by the grip portion, and the caulking fixing operation can be stably performed. Furthermore, by making it possible to adjust the direction of the fixing device, it is possible to respond to the position and height of the fixing point of the reinforcing bar in the reinforcing bar structure in which the main bars and the shear reinforcing bars are combined.

As described above, the reinforcing bar fixing device of the present invention is an apparatus capable of performing the above-described caulking operation process using the fixing bracket capable of fixing the intersecting reinforcing bars, and the reinforcing bars which cross each other without requiring a skilled technique. A device is provided which can be fixed easily, efficiently and firmly.

It is side explanatory drawing of the fixing device of this invention. It is a plane explanatory view of a fixing device. It is perspective explanatory drawing of a fixing device. It is perspective explanatory drawing of the fixing device which has arrange | positioned a fixing bracket and a reinforcement. It is side explanatory drawing of the crimping mechanism part before the occlusal operation start with a pressing material holder and a hook-shaped crimping member. It is side explanatory drawing of the crimping mechanism part which completed crimping operation | movement. FIG. 7 is a partial explanatory view showing a caulking fixed state of the pressing member and the hook-like caulking member from FIG. 5 to FIG. 6. FIG. 8 is a partial explanatory view showing a state in which the occlusion state shown in FIG. 7 is further advanced. It is the front view (a), the side view (b), and the top view (c) of the metal fitting which arranged the shear reinforcement which carried out bending processing at right angles to the main reinforcement to the grasping part and the insertion part, respectively. It is perspective explanatory drawing of the fixed location completed by the fixing bracket of the reinforcement of FIG. It is a front view (a), a side view (b), and a top view (c) of a metal fitting in which a main bar and a shear reinforcing bar are arranged orthogonally in a cross shape. It is perspective explanatory drawing of the fixed location completed by the fixing bracket of the reinforcement of FIG. It is an operation | work process figure to the rebar of a holding | grip side part.

The details of the reinforcing bar fixing device of the present invention will be described below based on the drawings.

FIG. 1 is a side view of the fixing device of the present invention, and FIG. 2 is a plan view. In this fixing device, a caulking mechanism is attached to the front of the drive device housing 1 attached to the support 3 via three U-shaped holding frames 2. The caulking mechanism portion includes, as main components, a receiving member 10 in which both a reinforcing bar and a fixing bracket can be disposed, a pressing member holder 20 on which a pressing member 21 is installed, and a hook-like caulking member 30. And as shown in FIG. 2, this caulking mechanism part is juxtaposed in 2 rows via the gap | interval 7 which can insert the insertion groove of a fixing bracket. The gap 7 is maintained by the holding frame 2 positioned at the center among the three holding frames 2.

And the apparatus fixing member 70 for fixing the whole apparatus to the reinforcement 200 arrange | positioned at the receiving material 10 is installed in the both outer sides of the caulking mechanism part juxtaposed in 2 rows. The device fixing member 70 includes a fixing hook 71 and a fixing handle 72. The fixing hook 71 rotates in the arrow direction by rotating the fixing handle 72 in the arrow direction shown in FIG. The function of fixing the entire fixing device to the rebar 200 is performed.

In addition, since the position of the fixing point of the reinforcing bar 200 changes depending on the target reinforcing bar structure, the length of the support 3 is adjusted prior to the fixing operation to the reinforcing bar 200 of the above-mentioned fixing device. The direction of the fixing device can be optimized according to the position of the fixing point of the reinforcing bar 200 by rotating the drive device storage body 1 with the handle 4 around the fixture 5 with the support 3 it can.

A hydraulic device is used as a drive unit housed in the drive unit housing 1. A hydraulic cylinder unit is housed in the housing 1, and is connected by a joint 51 by a driving force transmitting member 60 connected to a rod of the hydraulic cylinder. The driving force is simultaneously transmitted to the respective caulking mechanisms provided side by side via the link mechanism constituted by the

links

52, 53 and the like. Incidentally, in the explanatory view, a driving oil hose and the like connected to the hydraulic pump and the hydraulic cylinder device are omitted and not shown.

FIG. 3 is a perspective view of the fixing device, and shows a state in which the driving device storage body 1 is rotated by the handle 4 and the caulking mechanism portions juxtaposed in two rows are slightly upward. Positioning pins 11 are respectively provided on the arc-shaped front surfaces of the respective support members 10 in the caulking mechanism. By providing a positioning hole in the bottom of the grip bottom surface portion 111 of the fixing bracket 100 shown in FIG. 9 and fitting it to the positioning pin 11, the fixing bracket can be easily disposed at an accurate position. FIG. 4 is a perspective explanatory view of a state in which the holding portion 110 of the fixing metal fitting in which the reinforcing bar 210 bent in the insertion groove is attached to each receiving material 10 is disposed and the reinforcing portion 200 is further held by the gripping portion 110 is there. In this embodiment, the reinforcing bar 200 is a main bar, and the reinforcing bar 210 is a shear reinforcing bar. The reinforcing bar 210 is accommodated in the gap 7 of the caulking mechanism unit juxtaposed in two rows together with the insertion groove of the fixing bracket, and the gripping unit 110 disposed on each receiving member 10 is a hook shape with the pressing member holder 20 The rebar 200 is caulked and fixed by the bite operation with the caulking member 30.

FIG. 5 is an explanatory side view of the caulking mechanism portion excluding the device fixing material 70, in which the gripping portion 110 and the reinforcing bar 200 are disposed on the receiving material 10, and the pressing material holder 20 and the hook-like caulking member 30 are engaged. It shows the state before starting the operation. In this embodiment, the grip portion 110 of the fixing fitting is formed in a V shape on one end of the opposing grip side, and in an L shape on the other end. 113 is easy to receive tip portion 115 and can be crimped and fixed. In addition, illustration of the reinforcement 210 is abbreviate | omitted. In this caulking mechanism portion, the pressing member 21 installed in the pressing member holder 20 is urged by an air cushion device (not shown) installed inside the pressing member holder 20 to be able to enter and exit with a projecting force. In this figure, it protrudes from the pressure holder 20 and is locked by the stopper 22. The pressing material holder 20 is rotatably attached to the rotary shaft 40 on one side of the receiving material 10 via a holder attaching portion 23. The hook-like caulking member 30 is rotatably attached to the rotation shaft 40 on the other side of the support 10.

As described above, the pressing material holder 20 and the hook-like caulking member 30 are rotatably attached to the same rotation shaft 40. Further, each is connected to the driving force transmitting member 60 at a joint 51 via a link 52 and a link 53, and this connecting portion constitutes a four-bar link mechanism. The

joints

51, 54, 55 at both ends of the

links

52, 53, and the common rotating shaft 40 of the pressing holder 20 and the hook-like caulking member 30 form four joints of the link mechanism, and two

links

52 and 53 Of the link, between the joint 54 and the rotary shaft 40 in the pressing holder 20 and between the joint 55 of the hook-like caulking member 30 and the rotary shaft 40 are equivalent to two links, and they become four links in total. , Constitute a four-bar link mechanism. The driving force is transmitted to the caulking mechanism via the link mechanism, whereby an occlusal operation of the pressing material holder 20 and the hook-like caulking member 30 is performed.

As indicated by the arrows in FIG. 5, as the driving force transmitting member 60 is advanced by the driving force from the driving device, the link 52 connecting the joint 51 and the joint 54 on the pressing holder 20 side, the joint 51 and the hook The link 53 connecting the joint 55 on the side of the caulking member 30 advances together, and the link equivalent portion between the rotation shaft 40 and the joint 54 and between the rotation shaft 40 and the joint 55 is caulked about the rotation shaft 40 The press holder 20 and the hook-like caulking member 30 are rotated in the direction of the arrow to advance the mutual occlusal operation.

FIG. 6 shows a state in which the engagement operation between the pressing material holder 20 and the hook-like caulking member 30 proceeds to complete the caulking fixing operation. The joint 54 and the joint 55 are moved to a position where their center points and the center line of the rotating shaft 40 are substantially linear due to the forward movement of the driving force transmitting member 60, and the occlusal operation is completed. In this state, the grip portion 110 of the fixing bracket completely crimps and fixes the reinforcing bar 200, and both ends of the grip portion 110 are crimped to form a crimp fixing portion 150. Then, the tip end surface 31 of the pressing member 21 formed on the slope is pressed by the tip end portion 31 of the hook-like caulking member 30 having a pressing force stronger than the protruding force biased by the pressing member 21, the pressing member 21. Is pushed into the inside of the pressure holder 20 and does not disturb the caulking and fixing operation by the hook-like caulking member 30.

7 and 8 are partial explanatory views schematically showing the caulking fixing operation by the pressing member 21 and the hook-like caulking member 30 between the state shown in FIG. 5 of the caulking mechanism portion and the state shown in FIG. is there. FIG. 7 shows a state in which the occlusal operation has progressed a little from the state shown in FIG. 5, and the grip side surface portion 114 of the grip portion 110 is pressed against the rebar 200 by the tip end surface 24 of the pressing member 21. The distal end portion 31 of the head 30 is in a state where it is about to start pressing the distal end portion 113 of the grip side portion 112, and shows a state corresponding to the process b shown in FIG.

FIG. 8 shows a state in which the occlusal operation has further progressed, in which the caulking fixing operation of the distal end portion 113 having received the distal end portion 115 by the distal end portion 31 of the hook-like caulking member 30 is started. A state corresponding to step d is shown. Further, the operation proceeds, and the tip end portion 31 of the hook-like caulking member 30 advances the caulking and fixing operation, and presses the tip surface 24 of the pressing member 21 and pushes it into the inside of the pressing holder 20 to reach the state of FIG. , The caulking fixed operation is complete.

As described above, by using the device of the present invention, as shown in FIGS. 4 and 5, the fixing bracket and the reinforcing

bars

200 and 210 are set in the device, and then the driving device is operated to receive the support material 10; The driving force is transmitted to the caulking mechanism section having the pressing material holder 20 and the hook-like caulking member 30 as the main components via the link mechanism, and the occlusal operation between the pressing material holder 20 and the hook-like caulking member 30 Progress to fix intersecting bars. Thereby, it can fix easily simply and efficiently, without requiring skilled technology.

The adjustment of the timing of the occlusal operation between the pressing material holder 20 and the hook-like caulking member 30 described above can be made appropriate by design adjustment of the respective shapes and the positions of the

joints

54 and 55 provided respectively. Moreover, when the thickness of the target rebar changes, etc., it can carry out by the same design adjustment.

FIG. 9 is a front view (a), a side view (b) and a top view (c) of the fixing bracket 100 used in the device of the present invention, which is a shear reinforcing bar bent at a right angle to the main bar 200 The state in which the reinforcing bars 210 are arranged is shown. Then, the rebar 210 bent at a right angle is inserted into and attached to the insertion groove 120, and the rebar 200 is then placed in communication with the grip bottom portions 111 of the pair of grip portions 110 and gripped. 4 and 5 show the same as when the grip portion 110 and the reinforcing bar 200 gripped thereto are set in the fixing device. FIG. 10 is a perspective view of the fixed portion of the reinforcing bar fixed to cross and fixed after completion of the caulking with this fixing bracket, and a pair of grips 110 form a caulking portion 150 at its tip, and caulking the reinforcing bar 200 It fixes, and the rebar 210 inserted and attached to the insertion groove 120 is also fixed together. The fixed portion is a place where the shear reinforcement bar is bent at a right angle, and is a corner portion in the reinforcing bar structure.

FIG. 10 shows a fixing bracket 101 used for fixing the reinforcing bar 220 which is straight and the reinforcing bar 200 which is a straight bar, in which the shear reinforcing bar is not bent. This fixing bracket 101 is different from the fixing bracket 100 shown in FIG. 9 in that the insertion groove 121 is not bent, and the other configuration and the caulking fixing operation of the grip portion 110 in the fixing device are completely the same. FIG. 12 is a perspective view of a fixed portion in which the reinforcing bars 200 and the reinforcing bars 220 cross each other in a cross and are fixed in a plane.

The pair of grips 110 in the

fixtures

100 and 101 of the embodiment shown in FIGS. 9 and 10 have the

grip side parts

112 and 114 facing each other, and the tip part 113 of one grip side part 112 is V-shaped The tip end portion 115 of the other grip side portion 114 is formed in an L shape, and the tip end portion 113 facilitates the reception of the tip end portion 115 as described above. The side surface portion 114 is formed in an arc shape. As described above, the grip side portion 114 is pressed against the reinforcing bar by the pressing member 21 and brought into close contact. Therefore, by making the grip side portion 114 into an arc shape, this operation can be smoothly performed. It is preferable that the radius of curvature of the arc be fit to the reinforcing bar 200 and smaller than the radius of curvature of the outer diameter of the reinforcing bar 200. In this case, by setting the curvature radius of the arc smaller by about 10 to 30% than the curvature radius of the outer diameter of the reinforcing bar 200, this process can be smoothly advanced.

In the fixing device of the present invention, the reinforcing bars to be fixed are not particularly limited, and any of round steel bars and deformed bar steels can be applied.

1 drive housing; 2 holding frame; 3 posts;
4 Device Orientation Handles; 5 Device Mountings; 6 Post Mounting Flanges;
7 clearances; 10 support members; 11 alignment pins;
20 pressing material holder; 21 pressing material; 22 stopper;
23 Holder mounting part; 24 end face;
30 hook-like caulking members; 31 caulking member tips; 40 rotating shafts;
51, 54, 55 joints; 52, 53 links; 60 driving force transmission members;
70 device fixing member; 71 fixing hook; 72 device fixing handle;
100 fixing bracket (insertion groove right angle); 101 fixing bracket (insertion groove straight line);
110 grip portion; 111 grip bottom surface portion; 112 grip side surface portion (one);
113 tip of grip side 112; 114 grip side (other);
115 tip end of grip side portion 114; 120 insertion groove (right angle);
121 insertion groove (straight line); 150 caulking fixing part;
200 rebar (main bars); 210 rebar (bending shear reinforcement bars);
220 rebar (straight shear rebar);

Claims

The insertion groove and the pair of grip portions, the insertion groove includes the groove bottom portion and the facing groove side portion extended from the groove bottom portion, and the respective centers of the facing groove side portions The upper end of the pair is provided with the pair of gripping portions, and the gripping portion includes a gripping bottom surface portion and a facing gripping side portion extended from the gripping bottom surface portion, and the pair of gripping portions communicate rebars The fitting portion is disposed so as to be grippably disposed, and a tip portion of one of the opposing gripping side portions is formed so as to be able to receive and crimp and fix a distal end portion of the other gripping side portion. An apparatus for intersecting and fixing a rebar inserted in a groove and a rebar gripped in the holding portion,
A pressing material holder on which a reinforcing material inserted into and attached to the insertion groove and a reinforcing material gripped on the gripping portion can be arranged together with the fixing bracket, and a pressing material holder provided with a pressing material which can be moved in and out And a caulking mechanism having a hook-like caulking member as a main component is juxtaposed in two rows with an interval allowing insertion of the insertion groove,
In each of the caulking mechanisms, the pressing material holder and the hook-like caulking member sandwich the receiving material therebetween, and are rotatably attached to the same rotation shaft, respectively, from the drive device via the link mechanism The other gripping side portion is pressed against the reinforcing bar by the pressing member by rotating with the driving force of the second gear and engaging with each other, and the tip portion of the other gripping side portion is the tip portion of the one gripping side portion Move to the vicinity,
Then, the hook-like caulking member caulks and fixes the tips of the holding side portions of both the sides, and presses the tip end face of the pressing member with the tip of the hook-like caulking member, thereby pressing the pressing member as the pressing member holder Locking device, characterized in that it is configured to be able to be pushed in and complete with a caulking locking operation.
The fixing device according to claim 1, wherein the cushion is an air cushion, and the drive device is a hydraulic device.
A device fixing member comprising a fixing hook and a fixing handle for fixing the fixing device to a reinforcing bar is provided on both outer sides of the caulking mechanism unit juxtaposed in two rows. The fixing device according to item 1 or 2.
The rotary device according to any one of claims 1 to 3, wherein the direction of the fixing device is adjustable according to the fixing position of the reinforcing bar, which is rotatably attached to the support at the outer side surface of the fixing device. Fixing device as described in.