JP2005002681A - Spacer for reinforcing bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spacer for a reinforcing bar that can be stably attached to a cage. <P>SOLUTION: The spacer A for the reinforcing bar comprises: a longitudinal plate-like spacer member 1 in which a center part 11 of a length direction is contacted on the inner face of a dug hole H and upper and lower ends are bent toward a cage side; a contact fitting 2 provided on the upper end of the spacer member 1 and applied on the outside peripheral face part of a main vertical bar B1 of the cage B; a connection lever 3 sandwiching the main vertical bar B1 together with the contact fitting 2a by applying to the inside peripheral face part of the main vertical bar B1 and connecting both the ends to both the side parts of the contact fitting 2a; a swing suppressing one-sided part 14 formed so as to suppress right and left swing of the spacer member 1 for a hoop bar B2 of the cage B by bending the lower end of the spacer member 1 in the length direction of the main vertical bar B1; and a fitting 2b provided integrally on the swing suppression one-sided part 14 and connected to the main vertical bar B1 downward of the hoop bar B2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reinforcing bar spacer that is attached to a reinforcing bar to be built in a drilling hole and maintains a predetermined distance between the reinforcing bar and the inner surface of the drilling hole.
[0002]
[Prior art]
Conventionally, there is a cast-in-place pile method as one of the pile foundation methods. This method excavates the ground to form a drill hole, inserts a reinforcing bar into the drill hole, and then casts concrete into the drill hole. This is a construction method for building piles.
[0003]
And it is necessary to ensure a certain cover to give the required durability to the pile formed as described above, Patent Document 1 includes a bulging portion formed by bending a belt-like plate material into a mountain shape, Place pile driving comprising upper and lower engaging portions for engaging with hoop muscles forming the core material of the place pile formed at both ends of the bulging portion or upper and lower clamping means for holding between the longitudinal main reinforcements constituting the core material. A spacer for a core material has been proposed.
[0004]
However, when the locking portions are formed at both ends of the bulging portion in the core spacer, the distance between the hoop muscles adjacent to each other in the vertical direction is matched with the distance between the vertical locking portions. Therefore, there is a problem that the core material spacer cannot be attached to the hoop line if the distance between the hoop lines is slightly different from the distance between the upper and lower engaging portions of the core material spacer.
[0005]
Further, in the case where the upper and lower clamping means are formed at both ends of the bulging portion in the core spacer, the core spacer is unintentionally rotated and displaced around the longitudinal main bar to ensure a certain fog. There was a problem that sometimes it was not possible.
[0006]
[Patent Document 1]
JP-A-8-105044
[0007]
[Problems to be solved by the invention]
The present invention stably attaches to the reinforcing bar bar without being affected by the distance between the hoop bars adjacent in the vertical direction in the reinforcing bar bar built in the excavation hole and without unexpectedly rotating around the longitudinal main bar of the reinforcing bar bar. A rebar spacer is provided.
[0008]
[Means for Solving the Problems]
The reinforcing bar spacer according to claim 1 is a vertically long plate-like spacer member in which the central portion in the length direction is in contact with the inner surface of the excavation hole and the upper and lower end portions are refracted toward the reinforcing bar side, and the spacer A fitting provided at the upper end of the member and applied to the outer peripheral surface portion of the longitudinal main bar of the reinforcing bar rod, and both end portions connected to the inner peripheral surface portion of the vertical main bar to the both side portions of the fitting. By refracting the lower end of the spacer member in the longitudinal direction of the longitudinal main bar by refracting the connecting bar that holds the vertical main bar together with the brace, the spacer member swings in the left-right direction with respect to the hoop bar of the reinforcing bar bar Swing restraint piece formed so as to restrain the swing, and a metal fitting integrally provided on the swing restraint piece and connected to the longitudinal main bar below the hoop muscle, or an extended portion from the swing restraint piece From the connecting piece portion formed by and locked to the hoop muscle And wherein the Rukoto.
[0009]
According to a second aspect of the present invention, in the reinforcing bar spacer according to the first aspect of the present invention, in the reinforcing bar spacer, the rocking restraint piece is formed in an L-shaped side surface extending from the outer peripheral surface portion to the lower peripheral surface portion of the hoop. It is characterized by being formed.
[0010]
The reinforcing bar spacer according to claim 3 is the reinforcing bar spacer according to claim 1 or 2, wherein the metal fitting connected to the vertical main bar below the hoop bar is the outer peripheral surface portion of the vertical main bar of the reinforcing bar bar. And a connecting rod that holds the vertical main bar together with the above-mentioned metal fitting by connecting both end portions to both side parts of the above-mentioned vertical metal bar. It is characterized by.
[0011]
Finally, the reinforcing bar spacer according to claim 4 is the reinforcing bar spacer according to claim 1, wherein the connecting piece portion to be engaged with the hoop bar is formed by forming the lower end extending portion of the spacer member in a hook shape. It is characterized by becoming.
[0012]
[Action]
The reinforcing bar spacer according to the present invention sandwiches the vertical main bar of the reinforcing bar with the brace and the connecting bar on the upper end side of the spacer member, and connects to the vertical main bar below the hoop bar on the lower end side of the spacer member. Alternatively, since the connecting piece is locked to the hoop bar, it can be attached to the bar bar regardless of the interval between the hoop bars adjacent in the vertical direction in the bar bar.
[0013]
And the spacer for reinforcing bars of the present invention is attached to the reinforcing bar rod because the spacer member is formed with a swing restraining piece portion that restrains the horizontal swing of the spacer member with respect to the hoop bars of the reinforcing bar rod. The rebar spacer is reliably restricted from being pivoted and displaced around the longitudinal main bar of the rebar rod by the rocking restraint piece of the spacer member, and is stably maintained in a state in which the desired posture is reliably maintained on the rebar rod. Can be attached.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An example of the reinforcing bar spacer of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the spacer member 1 of the reinforcing bar spacer A has the upper and lower ends of a vertically long rectangular metal plate having a constant width and a constant thickness facing the reinforcing bar B side toward the tip. The center portion 11 is formed in a bent state and is in contact with the inner peripheral surface H1 of the excavation hole H, and the upper and lower pieces 12, 13 extending from the upper and lower edges of the center portion 11, respectively. It consists of.
[0015]
Further, the lower end portion of the lower piece 13 is refracted substantially parallel to the longitudinal main reinforcement B1 of the reinforcing bar B and the lower end portion of the refracted portion is further provided on the lower end of the spacer member 1 of the reinforcing bar B. By refracting at a substantially right angle toward the hoop line B2 side, the rocker is composed of an upright part 14a and a lower end part 14b extending substantially horizontally from the lower end edge of the upright part 14a toward the hoop line B2 side. The movement restraining piece 14 is formed. When the reinforcing bar spacer A is attached to the reinforcing bar 籠 B, the swinging restraining piece 14 extends from the outer peripheral surface of the hoop bar B2 of the reinforcing bar 籠 B to the lower peripheral surface. The spacer member 1 is configured to prevent the spacer member 1 from swinging in the left-right direction with respect to the hoop line B2.
[0016]
Further, as shown in FIGS. 1 and 2, upper and lower abutting fittings 2a and 2b having the same structure are integrally provided on the upper and lower ends of the spacer member 1, respectively. Connection rods 3a and 3b are connected to 2b.
[0017]
The above-mentioned metal fittings 2a, 2b are formed by bending both ends in the width direction of a metal plate-like body having a constant width and a constant thickness in the direction of the length toward the reinforcing bar B side and in the length direction. It is formed by bending in a state where both ends are expanded toward the tip toward the reinforcing bar B side.
[0018]
That is, the above-mentioned metal fittings 2a and 2b are arranged in a state where both sides in the longitudinal direction at the center portions 21a and 21b of the front horizontally long rectangular shape having a certain vertical width are expanded toward the tip toward the reinforcing bar B side. The flat portions having a predetermined width over the entire length of the central portions 21a, 21b and the upper and lower end edges of the central portions 21a, 21b and the side pieces 22a, 22b, 23a, 23b are provided with projecting pieces 22a, 22b, 23a, 23b. Bow-shaped upper and lower flap pieces 24a, 24b, 25a, and 25b are provided to project toward the reinforcing bar B side.
[0019]
The one-side piece portions 22a, 22b of the above-mentioned metal fittings 2a, 2b penetrate through between the inner and outer surfaces and are open at the front end surfaces of the one-side piece portions 22a, 22b. 221a and 221b are formed, and the other side pieces 23a and 23b of the metal fittings 2a and 2b have elliptical insertion holes 231a and 231b that are long in the left-right direction through which the connecting rods 3a and 3b can be inserted. It penetrates in the state penetrated over the inner and outer surfaces of the other side pieces 23a, 23b. Note that the widths of the notches 221a and 221b are formed to be wider than the diameters of the connecting rods 3a and 3b.
[0020]
Further, the connecting rods 3a and 3b connected to the above-mentioned metal fittings 2a and 2b are formed in a plane L shape by bending a metal rod-like body having a fixed length and a fixed diameter from the central portion thereof at a substantially right angle. One end of each of the connecting rods 3a and 3b is removably inserted into the cutout portions 221a and 221b of the one side piece portions 22a and 22b of the above-mentioned fittings 2a and 2b, and the connecting rods 3a and 3b Are inserted into the insertion holes 231a, 231b of the other side pieces 23a, 23b of the above-mentioned metal fittings 2a, 2b in a detachable manner.
[0021]
Then, screw grooves 31a, 31b, 32a, 32b are formed on both ends in the length direction of the connecting rods 3a, 3b, and the notches 221a, 221b and the insertion holes 231a, Nut bodies 33a, 33b, 34a, and 34b are threadably engaged with the screw grooves 31a, 31b, 32a, and 32b of the connecting rods 3a and 3b that protrude outward from the 231b. The nut bodies 33a, By moving 33b, 34a, 34b forward and backward with respect to the screw grooves 31a, 31b, 32a, 32b of the connecting rods 3a, 3b, the upper and lower flap pieces 24a of the connecting rods 3a, 3b and the metal fittings 2a, 2b facing the connecting rods 3a, 3b, It is comprised so that the space | interval between 24b, 25a, 25b can be adjusted.
[0022]
The lower flap piece 25a projecting from the lower end edge of the central portion 21a of the upper abutting metal fitting 2a constructed in this way is fixedly integrated with the upper surface of the upper end edge of the spacer member 1 and the lower abutting metal fitting 2b. The upper flap piece 24b protruding from the upper edge of the central portion 21b is fixedly integrated with the lower surface of the lower end portion 14b of the swing restraining piece portion 14 of the spacer member 1 to form a reinforcing bar spacer A. Yes.
[0023]
As shown in FIG. 3, the same vertical main reinforcing bar B1 is inserted between the upper and lower metal fittings 2a and 2b and the upper and lower connecting rods 3a and 3b opposite to the upper and lower metal fittings 2a and 2b in the reinforcing bar spacer A and When the vertical main bar B1 is sandwiched between the metal fittings 2a and 2b and the upper and lower connecting rods 3a and 3b facing the metal bars 2a and 2b, the vertical main bar B1, the central portion 11 of the spacer member 1 of the reinforcing bar spacer A, and the swing suppression piece. The portion 14 is in a substantially parallel state, and a hoop bar B2 is disposed between the vertical main bar B1 and the swing restraining piece 14 of the spacer member 1 of the spacer A for the reinforcing bar. The swing suppression piece 14 is configured to contact or extend along a slight gap from the outer peripheral surface portion to the lower peripheral surface portion of the muscle B2.
[0024]
Next, the usage point of the said reinforcing bar spacer A is demonstrated. First, as shown in FIG. 4, a plurality of planar circular hoops B2, B2,... Are arranged at predetermined intervals, and the plurality of hoops B2, B2,. Further, a plurality of straight main bars B1, B1,... Are arranged at predetermined intervals inside the hoops B2, B2,. B is prepared.
[0025]
Thereafter, after nut bodies 33a, 33b, 34a, and 34b screwed to both ends of the upper and lower connecting rods 3a and 3b in the reinforcing bar spacer A are screwed, one end portions of the connecting rods 3a and 3b are It removes from the one side piece part 22a, 22b of the metal fittings 2a and 2b through the notch parts 221a and 221b of the metal fittings 2a and 2b.
[0026]
Then, the upright portion 14a of the swing restraining piece 14 of the spacer member 1 in the reinforcing bar spacer A is brought into contact with or slightly contacted with the outer peripheral surface portion of the hoop bar B2 at the intersection of the longitudinal main bar B1 and the hoop bar B2 in the reinforcing bar B. The lower end portion 14b of the rocking restraint piece 14 is opposed to the lower peripheral surface portion of the hoop muscle B2 or opposed with a small gap therebetween, and the rocking restraint is further made. The front edge of the upper and lower flap pieces 24b, 25b of the lower metal fitting 2b is connected to the outer peripheral surface portion of the longitudinal main reinforcement B1 crossing the hoop reinforcement B2 along the piece 14 near the lower portion of the hoop reinforcement B2. The top edges of the upper and lower flap pieces 24a, 25a of the upper abutting fitting 2a are brought into contact with the outer peripheral surface portion of the vertical main bar B1 located above B2.
[0027]
Next, nut bodies 33a and 33b in which one end portions of the connecting rods 3a and 3b are screwed into the notches 221a and 221b of the upper and lower metal fittings 2a and 2b are one side pieces of the metal fittings 2a and 2b. Inserted in a state of being disposed outside the portions 22a and 22b.
[0028]
Subsequently, the nut bodies 33a, 33b, 34a, 34b screwed to the both ends of the upper and lower connecting rods 3a, 3b are screwed, so that the upper and lower connecting rods 3a, 3b and the upper and lower abutting fittings 2a, The reinforcing bar spacer A is stably attached to the outer peripheral surface of the reinforcing bar bar B by sandwiching the same vertical main bar B1 with 2b.
[0029]
By repeating such a procedure, the reinforcing bar spacer A is attached to the intersection of the longitudinal main bar B1 and the hoop bar B2 in the reinforcing bar rod B. At this time, the reinforcing bar spacer A does not need to be attached to all the intersections of the longitudinal main bars B1 and the hoops B2 in the reinforcing bar B, but can be attached to any intersections of the longitudinal mains B1 and the hoops B2. Although it is good, it is preferable to attach the reinforcing bar spacer A to the outer peripheral surface of the reinforcing bar B substantially uniformly.
[0030]
Thereafter, as shown in FIG. 5 and FIG. 6, a plurality of reinforcing bar spacers A, A... Are separately provided in a flat circular excavation hole H excavated from the ground to a predetermined depth. Reinforcing bar 籠 B to which is attached is inserted and arranged sequentially from the lower end.
[0031]
At this time, the central portion 11 of the spacer member 1 of the reinforcing bar spacer A attached to the outer peripheral surface of the reinforcing bar B is in sliding contact with the inner peripheral surface H1 of the excavation hole H, and the reinforcing bar B is excavated in the reinforcing bar spacer A. While stress is applied in the direction opposite to the insertion direction into the hole H, the swing suppression piece 14 of the spacer member 1 of the reinforcing bar spacer A is in a state of being locked to the hoop bar B2 from below, The swing restraining piece 14 of the reinforcing bar spacer A reliably prevents the reinforcing bar spacer A from pivoting and displacing around the longitudinal main bar B1 of the reinforcing bar rod B.
[0032]
Accordingly, the reinforcing bar spacer A is disposed in the excavation hole H of the reinforcing bar rod B and after the disposition, despite the stress applied by the sliding contact with the inner peripheral surface H1 of the excavation hole H. The state where the rebar bar B is securely attached to the predetermined attachment position in an accurate posture is maintained.
[0033]
Then, as shown in FIG. 7, in the state where the reinforcing bar B is disposed in the excavation hole H, the central portion 11 of the spacer member 1 of the reinforcing bar spacer A contacts the inner peripheral surface H1 of the excavation hole H. It is in a state of contact, and is substantially uniform over the entire circumference of the reinforcing bar rod B by the reinforcing bar spacer A between the outer peripheral surface of the reinforcing bar rod B and the inner peripheral surface H1 of the excavation hole H opposed thereto. A gap is formed.
[0034]
After that, concrete is cast into the excavation hole H to form a pile. As described above, the outer peripheral surface of the reinforcing bar B and the inner peripheral surface H1 of the excavation hole H opposed thereto by the reinforcing bar spacer A. Since a substantially constant gap is formed between them, a cover having a substantially uniform thickness is formed over the entire circumference of the obtained pile, and a pile having a desired durability is obtained. Can do.
[0035]
Next, another embodiment of the reinforcing bar spacer will be described. As shown in FIG. 8, the spacer member 4 of the reinforcing bar spacer A ′ has an upper and lower end portions of a vertically long rectangular metal plate having a constant width and a constant thickness toward the reinforcing bar side and toward the tip. A center portion 41 that is refracted into an expanded state and abuts against the inner peripheral surface H1 of the excavation hole H, and upper and lower piece portions 42, 43 extending from the upper and lower edges of the center portion 41, Consists of.
[0036]
At the lower end of the spacer member 4, the lower end 43 of the lower piece 43 is refracted substantially parallel to the longitudinal main reinforcement B1 of the reinforcing bar B and is formed in the swing suppression piece 44. A portion extending downward from the swing suppression piece portion 44 is formed in the connecting piece portion 45 by bending in a hook shape upward toward the hoop muscle B2 side.
[0037]
Further, at the central portion of the connecting piece 45 in the width direction, a notch portion 451 having a constant width that opens at the front end surface of the connecting piece 45 extends through the entire length of the connecting piece 45. When the connecting piece 45 of the reinforcing bar spacer A is engaged with the hoop bar B2 at the intersection of the main reinforcing bar B1 and the hoop bar B2 of the reinforcing bar B, the connecting piece part 45 is formed. And the main rebar B1 are prevented from colliding with the notch 451. The notch 451 may reach the rocking suppression piece 44.
[0038]
In addition, an upper end of the spacer member 4 is integrally provided with a metal fitting 5 having the same structure as the metal fitting 2, and the metal fitting 5 has the same structure as the connecting rods 3a and 3b. A connecting rod 6 having a structure is connected.
[0039]
Specifically, the abutment metal fitting 5 is formed by bending both ends in the width direction of a front horizontally long rectangular metal plate having a constant width and a constant thickness at right angles toward the reinforcing bar B side. It is bent and formed in a state in which both end portions in the vertical direction are expanded toward the tip toward the reinforcing bar B side.
[0040]
That is, the aforesaid metal fitting 5 has both side piece parts 52 in a state in which both ends in the length direction of the center part 51 of the front horizontally long rectangular shape having a certain vertical width are expanded toward the tip toward the reinforcing bar B side, The upper and lower edges of the central portion 51 and both side pieces 52 and 53 have a predetermined width over the entire length thereof, and upper and lower flap pieces 54 and 55 having a substantially arcuate shape are provided on the reinforcing bar B side. Protruding toward.
[0041]
A notch 521 having a constant width is formed in the one side piece 52 of the metal fitting 5 so as to penetrate between the inner and outer surfaces and open to the front end surface of the one side piece 52. On the other hand, the other side piece 53 of the above-mentioned metal fitting 5 has an elliptical insertion hole 531 extending in the left-right direction through which the connecting rod 6 can be inserted and penetrated between the inner and outer surfaces of the other side piece 53. It is penetrated by. The width of the notch 521 is formed so as to be wider than the diameter of the connecting rod 6.
[0042]
Further, the connecting rod 6 connected to the above-mentioned metal fitting 5 is formed in a plane L shape by bending a metal rod-shaped body having a fixed length at a right angle from the central portion thereof. One end portion is inserted in the notch portion 521 of the one side piece portion 52 of the abutting metal fitting 5 so as to be detachable, and the other end portion of the connecting rod 6 is inserted through the other side piece portion 53 of the abutting metal fitting 5. 531 is removably inserted.
[0043]
Then, screw grooves 61 and 62 are formed on both end portions of the connecting rod 6 in the length direction, and the screws of the connecting rod 6 projecting outward from the notch 521 and the insertion hole 531 of the metal fitting 5. Nut bodies 63 and 64 are threadably engaged with the grooves 61 and 62, respectively. By moving the nut bodies 63 and 64 forward and backward with respect to the screw grooves 61 and 62 of the connection rod 6, the connection rod 6 And the interval between the upper and lower flap pieces 54 and 55 of the metal fitting 5 facing this.
[0044]
The reinforcing bar spacer A is configured by fixing and integrating the lower end of the outer surface of the central portion 51 of the metal fitting 5 thus configured with the upper end of the spacer member 4.
[0045]
Then, as shown in FIG. 9, the connecting piece 45 of the reinforcing bar spacer A ′ is locked from below to the hoop bar B2 at the intersection of the longitudinal main bar B1 and the hoop bar B2 of the reinforcing bar B, When the vertical main bar B1 intersecting with the hoop bar B2 is sandwiched between the metal fitting 5 and the connecting bar 6 opposite to the upper bar B2 above the hoop bar B2, the vertical main bar B1 and the spacer member of the reinforcing bar spacer A ′ 4 center part 41 and rocking | fluctuation suppression piece part 44 are comprised so that it may be in a substantially parallel state.
[0046]
Next, how to use the reinforcing bar spacer A ′ will be described. After the nut bodies 63 and 64 screwed to the both ends of the connecting rod 6 in the reinforcing bar spacer A ′ are screwed out, one end of the connecting rod 6 is applied through the notch 521 of the abutment fitting 5. Remove from the one side piece 52 of the metal fitting 5.
[0047]
Then, the connecting piece 45 in the reinforcing bar spacer A ′ is engaged with the hoop bar B2 at the intersection of the longitudinal main bar B1 and the hoop bar B2 of the reinforcing bar B from below and positioned above the hoop bar B2. It is set as the state which made the front-end edge of the upper-and-lower flap pieces 54 and 55 of the upper side metal fitting 5 contact | abut to the outer peripheral surface part of the said vertical main reinforcement B1 part.
[0048]
Next, the nut body 63 in which one end portion of the connecting rod 6 is screwed into the notch portion 521 of the abutting metal fitting 5 is arranged outside the one side piece portion 52 of the abutting metal fitting 5. Insert.
[0049]
Subsequently, the nut bodies 63 and 64 screwed to both ends of the connecting rod 6 are screwed, and the connecting piece 45 of the rebar spacer A ′ is formed by the connecting rod 6 and the brace 5 facing the connecting rod 6. The reinforcing bar spacer A is stably attached to the outer peripheral surface of the reinforcing bar bar B by sandwiching the vertical main bar B1 intersecting with the hoop bar B2 being locked above the hoop bar B2.
[0050]
Such a procedure is repeated, and the reinforcing bar spacer A ′ is attached to the intersection of the longitudinal main bar B1 and the hoop bar B2 in the reinforcing bar B (see FIG. 10). At this time, the reinforcing bar spacer A ′ does not need to be attached to all the intersections of the longitudinal main bars B1 and the hoops B2 in the reinforcing bar B, but is attached to any intersections of the longitudinal mains B1 and the hoops B2. However, it is preferable to attach the reinforcing bar spacer A ′ to the outer peripheral surface of the reinforcing bar rod B substantially uniformly.
[0051]
Thereafter, as shown in FIG. 11 and FIG. 12, a plurality of rebar spacers A ′ and A ′ are separately provided in a flat circular excavation hole H excavated from the ground to a predetermined depth. Are inserted and arranged sequentially from the lower end.
[0052]
At this time, the central part 41 of the spacer member 4 in the reinforcing bar spacer A ′ attached to the outer peripheral surface of the reinforcing bar B comes into sliding contact with the inner peripheral surface H1 of the excavation hole H, so that the reinforcing bar B ′ is in contact with the reinforcing bar B ′. Although stress is applied in the direction opposite to the direction of insertion into the excavation hole H, the connecting piece 45 of the spacer member 4 of the reinforcing bar spacer A ′ is locked to the hoop bar B2 from below. The reinforcing bar spacer A ′ prevents the reinforcing bar spacer A ′ from rotating unexpectedly around the longitudinal main bar B1 of the reinforcing bar rod B by the swing restraining piece 44 of the reinforcing bar spacer A ′.
[0053]
Accordingly, the reinforcing bar spacer A ′ is in spite of the stress applied by the sliding contact with the inner peripheral surface H1 of the excavation hole H during and after the arrangement of the reinforcing bar rod B in the excavation hole H. The state where the rebar rod B is securely attached to the predetermined attachment position in an accurate posture is maintained.
[0054]
As shown in FIG. 13, in a state where the reinforcing bar B is disposed in the excavation hole H, the central portion 41 of the spacer member 4 of the reinforcing bar spacer A ′ is located on the inner peripheral surface H1 of the excavation hole H. It is in a state of contact, and between the outer peripheral surface of the reinforcing bar B and the inner peripheral surface H1 of the excavation hole H opposed thereto, the entire length of the reinforcing bar B is substantially covered by the reinforcing bar spacer A ′. A uniform gap is formed. Since the procedure other than the above is the same procedure as that for the reinforcing bar spacer A, the description thereof is omitted.
[0055]
【The invention's effect】
The reinforcing bar spacer according to claim 1 is a vertically long plate-like spacer member in which the central portion in the length direction is in contact with the inner surface of the excavation hole and the upper and lower end portions are refracted toward the reinforcing bar side, and the spacer A fitting provided at the upper end of the member and applied to the outer peripheral surface portion of the longitudinal main bar of the reinforcing bar rod, and both end portions connected to the inner peripheral surface portion of the vertical main bar to the both side portions of the fitting. By refracting the lower end of the spacer member in the longitudinal direction of the longitudinal main bar by refracting the connecting bar that holds the vertical main bar together with the brace, the spacer member swings in the left-right direction with respect to the hoop bar of the reinforcing bar bar Swing restraint piece formed so as to restrain the swing, and a metal fitting integrally provided on the swing restraint piece and connected to the longitudinal main bar below the hoop muscle, or an extended portion from the swing restraint piece From the connecting piece portion formed by and locked to the hoop muscle Because characterized Rukoto, rebar spacer can be attached stably at the intersection between the longitudinal main reinforcement and hoop in reinforcing bar cage.
[0056]
In addition, when the reinforcing bar spacer is attached to the outer peripheral surface of the reinforcing bar bar, the reinforcing bar spacer is not unintentionally rotated and displaced around the longitudinal main bar by the swing suppression piece of the reinforcing bar spacer. The spacer can be maintained accurately and reliably attached to the reinforcing bar rod.
[0057]
Furthermore, since the reinforcing bar spacer can be stably attached to the outer peripheral surface of the reinforcing bar rod without welding to the longitudinal main bar and hoop reinforcing bar, the strength of the vertical reinforcing bar and the hoop bar of the reinforcing bar rod is reduced. Therefore, the pile which has the outstanding intensity | strength can be reliably manufactured by using the said spacer for reinforcing bars.
[0058]
According to a second aspect of the present invention, in the reinforcing bar spacer according to the first aspect of the present invention, in the reinforcing bar spacer, the rocking restraint piece is formed in an L-shaped side surface extending from the outer peripheral surface portion to the lower peripheral surface portion of the hoop. It can be attached in a state where the swing restraint piece of the reinforcing bar spacer is placed along the hoop of the reinforcing bar, so that the reinforcing bar with the reinforcing bar spacer is excavated. Even if an external force is applied to the reinforcing bar spacer when inserting it into the hole, the rocking restraint piece is locked to the hoop bar from below, and the reinforcing bar spacer is located at a predetermined position of the reinforcing bar bar Can be reliably maintained, and a desired gap can be reliably formed between the reinforcing bar rod and the inner peripheral surface of the excavation hole opposed thereto.
[0059]
The reinforcing bar spacer according to claim 3 is the reinforcing bar spacer according to claim 1 or 2, wherein the metal fitting connected to the vertical main bar below the hoop bar is the outer peripheral surface portion of the vertical main bar of the reinforcing bar bar. And a connecting rod that holds the vertical main bar together with the above-mentioned metal fitting by connecting both end portions to both side parts of the above-mentioned vertical metal bar. Therefore, the reinforcing bar spacer can be securely and securely attached to the outer peripheral surface of the reinforcing bar rod by securely holding the vertical main bar between the upper and lower metal fittings and the upper and lower connecting rods opposed thereto.
[0060]
Finally, the reinforcing bar spacer according to claim 4 is the reinforcing bar spacer according to claim 1, wherein the connecting piece portion to be engaged with the hoop bar is formed by forming the lower end extending portion of the spacer member in a hook shape. Therefore, the lower end portion of the reinforcing bar spacer can be stably fixed to the hoop bar by locking the connecting piece to the hoop bar.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a reinforcing bar spacer according to the present invention.
FIG. 2 is a cross-sectional view showing a metal fitting and a connecting rod of the reinforcing bar spacer of FIG. 1;
FIG. 3 is a perspective view showing a usage state of the reinforcing bar spacer of FIG. 1;
4 is a perspective view showing a usage state of the reinforcing bar spacer of FIG. 1. FIG.
5 is a schematic view showing a usage state of the reinforcing bar spacer of FIG. 1. FIG.
6 is a schematic view showing a usage state of the reinforcing bar spacer of FIG. 1. FIG.
7 is a longitudinal sectional view showing a state in which the reinforcing bar spacer of FIG. 1 is used.
FIG. 8 is a perspective view showing another example of a reinforcing bar spacer according to the present invention.
9 is a perspective view showing a usage state of the reinforcing bar spacer of FIG. 8. FIG.
10 is a perspective view showing a usage state of the reinforcing bar spacer of FIG. 8. FIG.
11 is a schematic view showing a usage state of the reinforcing bar spacer of FIG. 8;
12 is a schematic view showing a usage state of the reinforcing bar spacer of FIG. 8; FIG.
13 is a longitudinal sectional view showing a usage state of the reinforcing bar spacer of FIG.
[Explanation of symbols]
1 Spacer member
14 Oscillation suppression piece
2a, 2b
3a, 3b connecting rod
4 Spacer member
44 Oscillation suppression piece
5 Bracket
6 Linkage
A, A 'Rebar spacer
B Steel bar
B1 Longitudinal muscle
B2 Hoop muscle

Claims (4)

A longitudinally long plate-like spacer member whose center in the length direction is in contact with the inner surface of the excavation hole and whose upper and lower ends are refracted toward the reinforcing bar side, and provided at the upper end of this spacer member, Holding the vertical main bars together with the above-mentioned metal fittings by applying the metal fittings applied to the outer peripheral surface portion of the vertical main bars and the both end portions of the metal bars to the inner peripheral surface portions of the vertical main bars and connecting the both ends to the both side portions of the above-mentioned vertical metal bars. A swing restraining piece formed to restrain the horizontal swing of the spacer member with respect to the hoop of the reinforcing bar by refracting the connecting rod and the lower end of the spacer member in the longitudinal direction of the longitudinal main reinforcing bar. And a fitting that is integrally provided on the swing restraining piece and is connected to the vertical main bar below the hoop muscle, or an extension from the swing restraining piece and is connected to the hoop muscle. Rebar spacer characterized by comprising one part 2. The reinforcing bar spacer according to claim 1, wherein the swing restraining piece is formed in a side L shape extending from the outer peripheral surface portion to the lower peripheral surface portion of the hoop. The metal fittings connected to the vertical main bars below the hoop bars are the metal fittings applied to the outer peripheral surface of the vertical main bars of the reinforcing bar rods, and both end portions of the metal fittings applied to the inner peripheral surface of the vertical main bars. The reinforcing bar spacer according to claim 1, wherein the reinforcing bar spacer includes a connecting rod that holds the longitudinal main bar together with the metal fitting by connecting to both side portions. The reinforcing bar spacer according to claim 1, wherein the connecting piece part to be engaged with the hoop bar is formed by forming a lower end extending part of the spacer member in a hook shape.

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