JP3196952U - Spacer for sandwiching reinforcing bars - Google Patents

Abstract

The present invention provides a spacer for holding a reinforcing bar, in which when a concrete is poured into a formwork provided with a reinforcing bar, a pin does not easily come off from a base body and the position of the reinforcing bar can be prevented from being displaced. A spacer A for holding a reinforcing bar having a substantially disc-shaped base body 1 having an insertion hole 11 and a notch 13 and a pin 2 having a pair of hook portions 21 and 21 and an embedded portion 22 is provided in the insertion hole. 11, the hook portions 21, 21 face the substrate side wall 14, and the embedded portion 22 is embedded in the substrate from the substrate side wall 14 near the bottom of the insertion hole 11. Since the embedding portion 22 of the pin 2 is embedded from the side wall 14 to the inside of the base body, the pin 2 remains on the base body 1 even if vibration is applied to the reinforcing bar holding spacer A when the ready-mixed concrete is driven into the reinforcing assembly. The position of the reinforcing bar can be prevented from coming off. [Selection] Figure 1

Description

  The present invention relates to a spacer for holding a reinforcing bar so that the position of the reinforcing bar does not change when ready-mixed concrete is driven.

  When constructing reinforced concrete by pouring ready-mixed concrete into a formwork with reinforcing bars, spacers are used because it is necessary to maintain the position of the reinforcing bars and the spacing between the reinforcing bars.

Utility Model Registration No. 3122006

The present inventor previously devised a spacer for reinforced concrete in which a reinforcing bar holding spring is fitted into a reinforcing bar insertion hole (Patent Document 1).

  When driving ready-mixed concrete into a reinforcing bar assembly, the ready-mixed concrete is often poured while giving vibration so that a void is not formed.

  When the spacer for reinforced concrete disclosed in Patent Document 1 is used, when the ready-mixed concrete is driven into the reinforcing bar assembly, it has been found that the reinforcing bar holding spring may come off from the reinforcing bar insertion hole due to vibration.

  An object of the present invention is to provide a spacer for sandwiching a reinforcing bar that prevents a pin from coming off the base when pouring concrete into a formwork in which the reinforcing bar is arranged, and prevents the displacement of the reinforcing bar.

(About claim 1)
The spacer for sandwiching the reinforcing bar is composed of a substantially disk-shaped base and a pin.
The base has an insertion hole formed in the center of the base and a notch extending from the outer periphery of the base to the insertion hole.

The pin has a pair of hook portions and an embedded portion.
The hook portion of the pin is bent inward symmetrically with respect to the symmetry axis, and faces the side wall of the base of the insertion hole.
The embedded portion of the pin is embedded in the substrate from the substrate side wall near the bottom of the insertion hole.

Attach the rebar holding spacer to the rebar in the following procedure.
Insert the notch of the base into the reinforcing bar and fit into the insertion hole.
At this time, the hook portion of the pin spreads and the hook portion sandwiches the reinforcing bar fitted in the insertion hole. Since the embedded portion of the pin is embedded from the side wall of the base into the base, the pin is difficult to come off from the base even if vibration is applied to the spacer for holding the reinforcing bar when placing the ready-mixed concrete, and the position of the reinforcing bar can be prevented. .

(About claim 2)
The spacer for sandwiching the reinforcing bar is composed of a substantially disk-shaped base and a pin.
The base has an insertion hole formed in the central part of the base and a notch connected to the insertion hole from the outer periphery of the base.

The pin has a pair of hook portions and an embedded portion, and the pair of hook portions exists in the first plane and is embedded in a second plane that intersects the first plane within a range of 100 to 170 degrees. Part exists.
The hook portion of the pin is bent inward symmetrically with respect to the symmetry axis, and faces the side wall of the base of the insertion hole.
The embedded portion of the pin is embedded in the substrate from the substrate side wall near the bottom of the insertion hole.

Attach the rebar holding spacer to the rebar in the following procedure.
Insert the notch of the base into the reinforcing bar and fit into the insertion hole.
At this time, the hook portion of the pin spreads and the hook portion sandwiches the reinforcing bar fitted in the insertion hole.

  Since the embedded portion of the pin is embedded from the side wall of the base into the base, the pin is difficult to come off from the base even if vibration is applied to the spacer for holding the reinforcing bar when placing the ready-mixed concrete, and the position of the reinforcing bar can be prevented. .

  In addition, since the second plane in which the embedded portion is present and the first plane in which the hook portion is present intersect each other in the range of 100 degrees to 170 degrees, the pins are deeply embedded in the base body and excellent in mechanical strength. .

(Claim 3)
Since the substrate is made of mortar or concrete, the spacer fits into the cast concrete.
Moreover, since a pin is stainless steel, it does not rust. Moreover, since it has springiness and is excellent in strength, the reinforcing bars are firmly held.

(About claim 4)
Since the cross-section of the insertion hole of the base is triangular, heart-shaped or elliptical, it is easy to manufacture the base using a mold. Moreover, when inserting the notch | incision of a base | substrate into a reinforcing bar, a reinforcing bar can be fit in a penetration hole well.

(Claim 5)
The spacer has two pins for one base, the hook portion of the first pin faces the side wall of the base of one insertion hole, and one inside the base from the side wall of the base near the bottom of the insertion hole. The embedding part of the eye pin is embedded, the hook part of the second pin faces the side wall of the base of the other insertion hole, and the second pin is inserted into the base from the side wall of the base near the bottom of the insertion hole. The embedded part is embedded.
For this reason, a reinforcing bar can be firmly clamped with two pins.

It is explanatory drawing of the spacer for reinforcing bar clamping which concerns on Example 1 of this invention. It is explanatory drawing of the procedure which equips the reinforcing bar with the spacer for holding the reinforcing bar. It is explanatory drawing of the spacer for reinforcing bar clamping which concerns on Example 2 of this invention. It is explanatory drawing which concerns on the other Example of an insertion hole. (A) is explanatory drawing of the spacer for reinforcing bar holding which concerns on Example 3 of this invention, (b) is explanatory drawing of the spacer for reinforcing bar holding which concerns on Example 4 of this invention. It is explanatory drawing which concerns on the other Example of a pin.

  The spacer for sandwiching the reinforcing bar is a pair of an insertion hole formed in the central part of the base, a substantially disk-shaped base having a notch extending from the outer periphery of the base to the insertion hole, and a pair bent inward symmetrically with respect to the symmetry axis. And a pin having an embedded portion existing in a second plane intersecting with the first plane where the pair of hook portions exist at 135 degrees, and the hook portion faces the side wall of the base of the insertion hole, and is inserted. The embedded portion is embedded in the inside of the base from the side wall of the base near the bottom of the hole.

When the notch of the base is inserted into the reinforcing bar and fitted into the insertion hole, the hook portion of the pin spreads, and the reinforcing bar fitted into the insertion hole is held between the hook portion of the pin.
Since the embedded portion of the pin is embedded from the side wall of the base into the base, the pin is difficult to come off from the base even if vibration is applied to the spacer for holding the reinforcing bar when placing the ready-mixed concrete, and the position of the reinforcing bar can be prevented. .

A spacer A for sandwiching reinforcing bars according to a first embodiment (corresponding to claims 1 to 4) of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the spacer A for sandwiching a reinforcing bar includes a base 1 made of mortar and a pin 2 made of stainless steel.

The substrate 1 has a substantially disk shape with a diameter of 6 cm and a thickness of 12 mm, and a plurality of depressions 10 are formed on the outer periphery.
An insertion hole 11 is provided in the center of the base body, and a notch 13 having a length of 24 mm reaching the insertion hole 11 from the outer periphery 12 of the base body is formed.

The notch 13 is set to have a width (11 mm) larger than the diameter of the reinforcing bar 3 so as to be inserted into the reinforcing bar 3.
The insertion hole 11 is a substantially triangular shape having a base of 21 mm and a hypotenuse of 16 mm.

The pin 2 includes a pair of hook portions 21 and 21 having a shape corresponding to the insertion hole 11 and an embedded portion 22.
The hook portions 21, 21 of the pin 2 exist on the first plane 24 and are bent inward symmetrically with respect to the symmetry axis 23.

The embedded portion 22 of the pin 2 exists on a second plane 25 that intersects the first plane 24 where the hook portions 21 and 21 exist at 135 degrees.
The hook portions 21 are faced to the base side wall 14 of the insertion hole 11, and the embedded portion 22 is embedded in the base from the base side wall 14 near the bottom of the insertion hole 11.

Next, a procedure for mounting the rebar holding spacer A on the rebar 3 and facing the mold 4 will be described with reference to FIG.
FIG. 2A shows the initial positional relationship between the mold 4, the reinforcing bar 3, and the spacer A for holding the reinforcing bar.

In FIG. 2A, as shown by an arrow 15, the notch 13 of the spacer A for holding the reinforcing bar 3 is inserted into the reinforcing bar 3 from the upper side of the reinforcing bar 3 in the drawing, and further pushed into the insertion hole 11.
At this time, the hook portions 21, 21 of the pin 2 spread, and the hook portions 21, 21 hold the rebar 3 fitted in the insertion hole 11.

  Next, as shown by the arrow 15 in FIG. 2B, the base 1 is rotated and stopped at the position of FIG. 2C where the notch 13 faces upward in the drawing. At this time, since the embedded portion 22 of the pin 2 is embedded in the base body 1, when the base body 1 is rotated in FIG. 2B, the hook portions 21, 21 continue to sandwich the rebar 3 and the pin 2 Rotates integrally with the substrate 1.

  Reinforcing bar sandwiching spacer A is attached to the reinforcing bar 3, and the ready-mixed concrete is poured into the bar assembly shown in FIG. At this time, the ready-mixed concrete is poured while giving vibration so as not to create a void.

The spacer A for sandwiching reinforcing bars of this embodiment has the following advantages.
Since the embedding portion 22 of the pin 2 is embedded from the side wall 14 to the inside of the base body, the pin 2 remains on the base body 1 even if vibration is applied to the reinforcing bar holding spacer A when the ready-mixed concrete is driven into the reinforcing assembly. The position of the reinforcing bar 3 can be prevented from being displaced.

  Since the second plane 25 where the embedded portion 22 exists and the first plane 24 where the hook portion 21 exists intersect at 135 degrees, the embedded portion 22 of the pin 2 is embedded deeply inside the base body. Is done. For this reason, the spacer A for sandwiching the reinforcing bars is excellent in mechanical strength, and the pin 2 is difficult to be detached from the base 1.

A reinforcing bar holding spacer B according to a second embodiment (corresponding to claims 1 to 5) of the present invention will be described with reference to FIG.
As shown in FIG. 3, the spacer B for sandwiching the reinforcing bar is composed of a base 1 made of mortar and pins 2 and 2 made of stainless steel.

The size and shape of the base body 1, the insertion hole 11, and the notch 13 are the same as those of the spacer A for sandwiching the reinforcing bar in the first embodiment.
Further, the size and shape of the pin 2 including the hook portion 21 and the embedded portion 22 are the same as those of the spacer A for holding the reinforcing bar of the first embodiment.

  The pin 2 has hook portions 21 and 21 facing the left and right substrate side walls 14 and 16 of the insertion hole 11, and the embedded portion 22 is embedded inside the substrate from the substrate side walls 14 and 16 near the bottom of the insertion hole 11. Yes.

  The procedure for attaching the reinforcing bar sandwiching spacer B to the reinforcing bar and facing the formwork is the same as in the first embodiment.

The spacer B for sandwiching reinforcing bars of the present embodiment has the following advantages.
Since the embedded portions 22 of the pins 2 and 2 are embedded in the base body from the base body side walls 14 and 16, even if vibration is applied to the reinforcing bar sandwiching spacer B when the ready-mixed concrete is driven into the reinforced assembly, the pin 2 does not come off from the base body 1 and the displacement of the reinforcing bars can be prevented.

  Since the reinforcing bar holding spacer B holds the reinforcing bar between the hooks 21 of the two pins 2 and 2, the spacer B is excellent in mechanical strength, and the pin 2 is not easily detached from the base 1.

(Modification)
a. The shape of the insertion holes 17, 18, and 19 may be an ellipse (a), a heart shape (b), or a regular triangle (c) in FIG. 4 (corresponding to claim 3).

b. As shown in FIG. 5A, the reinforcing bar holding spacer C according to the third embodiment has the hook portion 51 facing the side wall 14 of the insertion hole 11 and the embedded portion 52 embedded in the base. Yes.
The embedded portion 52 includes a first embedded portion 52 a and a second embedded portion 52 b, and the first embedded portion 52 a is perpendicular to the substrate side wall 14 from the substrate side wall 14 near the bottom of the insertion hole 11 to the inside of the substrate. The second embedded portion 52 b is embedded horizontally with the base body side wall 14.
Since the pin 5 is easy to manufacture and the embedded portion 52 is embedded from the side wall 14 of the base into the base, vibration is applied to the spacer C for sandwiching the reinforcing bar when the ready-mixed concrete is driven into the reinforced assembly. However, the pin 5 does not come off from the base body 1, and the displacement of the reinforcing bars can be prevented.

c. As shown in FIG. 5B, a pin 6 to which the embedded portions 62, 62 are not connected may be employed.
In the spacer D for sandwiching the reinforcing bar of the fourth embodiment, the hook portion 61 faces the substrate side wall 14 of the insertion hole 11, and the embedded portion 62 of the pin 6 is inserted into the holes h and h formed in the substrate side wall 14 of the insertion hole 11. 62 are inserted and fixed with an adhesive.
The pin 6 is easy to manufacture, and since the embedded portions 62 and 62 are inserted into the holes h and h of the substrate side wall 14 and fixed with an adhesive, the rebar is sandwiched when the ready-mixed concrete is driven into the reinforced assembly. Even if vibration is applied to the spacer D for use, the pin 6 does not come off from the base 1 and the position of the reinforcing bar can be prevented.

d. As shown to (a)-(e) of FIG. 6, you may change the magnitude | size and shape of a pin according to the thickness of a reinforcing bar.

A, B, C, D Rebar sandwiching spacer 1 Base 2, 5, 6 Pins 11, 17, 18, 19 Insertion hole 13 Notch 14 Base side wall 23 Symmetrical axes 21, 51, 61 Hooks 22, 52, 62 Filled Insert portion 24 First plane 25 Second plane

Claims (5)

A substantially disc-shaped substrate having an insertion hole formed in the center of the substrate and a notch extending from the outer periphery of the substrate to the insertion hole;
A pair of spacers for pinching a reinforcing bar comprising a pair of hook portions bent inward symmetrically with respect to an axis of symmetry, and a pin having an embedded portion;
A reinforcing bar holding spacer, wherein the hook portion faces the base side wall of the insertion hole, and the embedded portion is embedded in the base from the base side wall near the bottom of the insertion hole. A substantially disc-shaped substrate having an insertion hole formed in the center of the substrate and a notch extending from the outer periphery of the substrate to the insertion hole;
A pair of hook portions that are folded inward symmetrically with respect to the symmetry axis, and an embedding that exists in a second plane that intersects the first plane in which the pair of hook portions exist within a range of 100 to 170 degrees A spacer for pinching a reinforcing bar composed of a pin having a portion,
A reinforcing bar holding spacer, wherein the hook portion faces the base side wall of the insertion hole, and the embedded portion is embedded in the base from the base side wall near the bottom of the insertion hole. The substrate is made of mortar or concrete;
The spacer for sandwiching reinforcing bars according to claim 1 or 2, wherein the pin is made of stainless steel.   4. The reinforcing bar holding spacer according to claim 1, wherein a cross section of the insertion hole is triangular, heart-shaped, or elliptical. 5. Two pins per one base,
The hook portion of the first pin faces the side wall of the base of one insertion hole, and the embedded portion of the first pin is embedded in the base from the side wall of the base near the bottom of the insertion hole,
The hook portion of the second pin faces the substrate side wall of the other insertion hole, and the embedded portion of the second pin is embedded inside the substrate from the substrate side wall near the bottom of the insertion hole. The reinforcing bar holding spacer according to any one of claims 1 to 4, wherein the reinforcing bar holding spacer is provided.

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