JP3993137B2 - Rebar spacing retainer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a reinforcing bar interval holding tool which is a cross reinforcing bar embedded in a reinforced concrete construction or other concrete product, and which is attached to an edge of a vertical bar and an adjacent crossing point and holds a gap between the reinforcing bar and the formwork.
[0002]
[Prior art]
Conventionally, as this type of reinforcing bar interval holder, a cap-like one can be seen as disclosed in Patent Document 1, but the reinforcing bar interval holder of such a configuration simply covers the end of the reinforcing bar. For this reason, it can easily be removed due to impact, vibration, etc. when placing concrete, and cannot fulfill its role.
On the other hand, the reinforcing bar spacing holder disclosed in Patent Document 2 holds the horizontal bars elastically holding the horizontal bars between the arm parts arranged perpendicular to the crowned parts of the longitudinal edges of the caps for inserting the vertical bars. By providing the part, it was not easily detached from the crossing rebar.
[0003]
[Patent Document 1]
JP 62-288247 A [Patent Document 2]
Japanese Utility Model Publication No. 59-38315 [0004]
[Problems to be solved by the invention]
By the way, the length from the edge of the vertical bar to the crossing point where the horizontal bar is welded is not always constant in the crossing reinforcing bar, and there is some variation, so the length from the crossing point to the vertical bar edge maintains the rebar spacing. If the device is longer than the horizontal muscle pinching hole to the bottom of the vertical muscle insertion hole drilled in the crown portion of the vertical muscle edge, the horizontal muscle cannot be fitted into the horizontal muscle pinching portion. It had to be cut for a predetermined length. Accordingly, there is a problem that the working efficiency is remarkably lowered.
[0005]
[Means for Solving the Problems]
In view of the above-mentioned problems, the present invention is made of a synthetic resin and is integrally formed, and a longitudinal muscle edge crowned portion that crowns the longitudinal muscle edge at the crossing reinforcing bar, and the longitudinal muscle edge crowned portion. The horizontal muscle holding portion is provided on both the left and right sides of the arm portion arranged orthogonally to the vertical muscle, and the horizontal muscle holding portion narrows the horizontal muscle insertion port toward the back. The length from the crossing bar crossing point to the vertical bar edge is constant by providing a piece and forming the inner diameter corresponding to the horizontal bar insertion direction of the horizontal bar pinching hole formed continuously at the horizontal bar insertion opening longer than the horizontal bar diameter. Even if it is not, the said subject is solved by enabling it to mount a reinforcing bar space | interval holder easily and easily, without cut | disconnecting the edge of a longitudinal bar.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
The reinforcing bar interval holder 1 shown in the figure is made of synthetic resin and is integrally formed, and the vertical bar edge crowned portion 2 for covering the vertical bar X end edge of the crossing reinforcing bar, and the vertical bar edge The arm part 3 is arranged orthogonally to the crowned part 2 and the transverse muscle pinching part 4 is provided on the left and right of the arm part 3 and sandwiches the transverse muscle Y welded orthogonally to the longitudinal muscle X.
The longitudinal muscle edge crowned portion 2 has its base formed in a substantially cylindrical shape, and the base end of the base is provided on the same plane as the upper surface of the arm 3, and the vertical muscle extends from the base end to the middle part of the base. An X insertion hole 5 is formed.
The tip of the base is formed in a substantially truncated cone shape and is provided with a projection 6 extending in the axial direction.
The projection 6 is formed of a cross-shaped plate piece projecting in four directions around the axis, the front and left and right plate pieces have the same width as the radius of the base, the tip is inclined toward the axis, and the rear plate piece , A base end having the same width as that of the lower part of the middle part of the arm 3 is emitted from the rear side and inclined from the base end toward the axis.
Further, at the opening end of the longitudinal reinforcement edge crowned portion 2, a semicircular arc side facing the crossing portion with the arm portion 3 is formed to form a reinforcing bar support portion 7, which is formed on the outer surface of the reinforcing bar support portion 7. Is provided with a single reinforcing rib piece 8 extending in the length direction.
The length of the longitudinal muscle edge crowned portion 2 (corresponding to the distance from the base end to the tip of the protrusion 6) and the length of the arm portion 3 are appropriately set.
[0007]
The arm portion 3 is formed in a substantially triangular plate shape that is symmetrical with the apex angle at the rear end of the intermediate portion, and has a substantially triangular plate-shaped collar that circumscribes the opening end of the longitudinal muscle edge crowned portion 2 at the center front. The piece 9 is integrally formed.
And the horizontal muscle clamping part 4 protrudes on the left and right of the upper surface of the arm part 3, and the reinforcing rib piece 10 of 1 line | wire protrudes in the lower surface of the arm part 3 over the left-right direction.
The transverse muscle pinching portion 4 has a pair of support pieces 11 erected on the front and rear sides at an interval having the same width as the diameter of the transverse muscle Y. The transverse piece insertion opening 12 is formed above the support piece 11 and the transverse muscle insertion opening 12. A claw piece 13 for retaining a horizontal stripe formed in a substantially triangular shape so as to narrow toward the back (downward) protrudes from the left and right misalignment position above the support piece 11.
The lower space between the support pieces 11 continuous below the transverse muscle insertion opening 12 is formed as a transverse muscle pinching hole 14 for receiving the transverse muscle Y. The transverse muscle pinching hole 14 is long in the transverse muscle insertion direction, that is, the transverse muscle holding hole 14 An inner diameter D corresponding to the transverse Y insertion direction is formed to be longer than the diameter YD of the transverse Y by a predetermined length (see FIG. 3).
In FIG. 3, in the reinforcing bar interval holder 1, when the distance from the edge of the vertical bar X to the crossing point of the horizontal bar Y is the same as the set value, the horizontal bar Y is indicated by a one-dot chain line and is longer than the set value. The horizontal stripe Y is indicated by a two-dot chain line.
[0008]
Next, attachment of the reinforcing bar interval holding tool to the cross reinforcing bar will be described.
In the crossed reinforcing bar, the longitudinal muscle X end edge is inserted into the insertion hole 5 of the longitudinal muscle edge crowned portion 2, and the transverse muscle Y is pushed into the transverse muscle insertion opening 12 of the transverse muscle holding portion 4.
As a result, the support piece 11 is elastically expanded due to its material properties, the horizontal bar Y is inserted into the horizontal bar pinching hole 14, and at the same time, the support bar 11 is elastically restored. The holder 1 is attached to the crossing rebar.
Even if the length from the crossing point to the edge of the vertical bar X is not constant in the crossing reinforcing bar, the inner diameter D corresponding to the insertion direction of the horizontal bar Y is formed longer than the diameter YD of the horizontal bar Y in the horizontal bar pinching hole 14. Therefore, the transverse muscle Y is inserted and held in the transverse muscle holding hole 14 without difficulty.
As described above, with the reinforcing bar interval holder 1 attached to the crossed reinforcing bar, the longitudinal bar edge crowned portion 2 holds the cover thickness between the mold P and the crossing reinforcing bar shown in FIG. Depending on the mounting state of the tool 1 with respect to the crossed reinforcing bars, both or one of the arm portions 3 separately maintains a distance from a formwork (not shown), and a desired cover thickness is ensured.
[0009]
【The invention's effect】
In short, the present invention is a reinforcing bar interval holding tool 1 integrally formed of synthetic resin, on an arm portion 3 arranged orthogonally to a longitudinal muscle edge crowned portion 2 that crowns the longitudinal muscle X edge . The transverse muscle holding portion 4 provided to the left and right and sandwiching the transverse muscle Y is provided with a claw piece 13 for preventing the transverse muscle that narrows the transverse muscle insertion opening 12 as it goes to the back, and the transverse muscle continuous to the transverse muscle insertion opening 12. Since the inner diameter D of the holding hole 14 corresponding to the insertion direction of the horizontal bar is longer than the diameter YD of the horizontal bar Y, even if the length from the crossing point to the end of the vertical bar X is not uniform in the crossing rebar, no trouble is required. The horizontal bar Y can be inserted into the horizontal bar pinching hole 14 without necessity, and the reinforcing bar interval holder 1 can be easily attached to the cross reinforcing bar. Conventionally, if the end of the vertical bar Y is not cut, the reinforcing bar interval holder 1 is used. The problem that could not be attached to the crossing rebar is completely eliminated, and the work efficiency is improved. It can be made with the good.
[0010]
At the opening end of the longitudinal muscle edge crowned portion 2, the rebar support portion 7 is formed by extending the semicircular arc side opposite to the intersection with the arm portion 3. The longitudinal bars X can be supported longer and the reinforcing bar interval holder 1 is not easily damaged by the load applied to the longitudinal bars X.
Further, since the reinforcing bar support portion 7 is formed in an arc shape as described above and is provided at a position opposite to the crossing portion with the arm portion 3, there is no hindrance to mounting on the crossing reinforcing bar, and it is simpler and more convenient. Its practical effect is enormous.
[Brief description of the drawings]
FIG. 1 is a front view of a reinforcing bar spacing holder.
FIG. 2 is a plan view of the same.
FIG. 3 is a left side view of the above.
FIG. 4 is a rear view of the same.
[Explanation of symbols]
2 Longitudinal muscle edge crown part 3 Arm part 4 Horizontal muscle pinching part
12 Transverse insertion opening
13 Nail pieces
14 Horizontal muscle pinching hole

Claims (2)

Reinforcing bar interval holder integrally formed of synthetic resin , which is a longitudinal muscle edge crowned portion covering the longitudinal muscle edge at the crossing reinforcing bar, and an arm arranged orthogonally to the longitudinal muscle edge crowned portion On the left and right on the part , a transverse muscle sandwiching portion is provided for sandwiching the transverse muscle welded orthogonally to the longitudinal muscle, and the transverse muscle sandwiching portion is provided with a claw piece for preventing transverse muscle that narrows the transverse muscle insertion port as it goes deeper, A reinforcing bar spacing holder characterized in that an inner diameter corresponding to a transverse muscle insertion direction of a transverse muscle holding hole continuous to a transverse muscle insertion opening is formed longer than a diameter of the transverse muscle .   The reinforcing bar interval holding tool according to claim 1, wherein a semicircular arc side facing the intersection with the arm portion is extended and formed at the opening end of the crown portion of the longitudinal muscle edge.

Images