JPH10169096A - Deformed joint bar anchor and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deformed joint bar anchor which is excellent in tensile strength, durability and mass-production effect. SOLUTION: The inserting mouth part 13 of a cylindrical anchor sleeve S is insertedly fitted and caulked in the tip part of a deformed reinforcement I to form it into a wholly section regular even polygon having biside faces (a), (b) substantially parallel to a diameter line to connect a vertical knot 13 opposite to the deformed reinforcement I, and the parallel biside face of the inserting mouth part 13 formed in the section regular even polygon is continuously caulked at spots which are positioned corresponding to the adjacent mutual relation of a horizontal node 12 in the deformed reinforcement I. Thus the above caulked part is made to function as a slide stopping key to lock on the horizontal node 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deformed reinforcing bar anchor used for construction work of a concrete block wall, partitioning work, and civil engineering work for reinforcing bars, and a method of manufacturing the same.

[0002]

2. Description of the Related Art The applicant of the present invention has previously proposed Japanese Patent Publication No. Hei 7-88660 regarding this type of deformed difference reinforcing bar anchor and its manufacturing method.

In the basic embodiment shown in FIGS. 1 to 5 of this known invention, the insertion sleeve (14) of the anchor sleeve (B) is inserted into the distal end of the deformed reinforcing bar (A) and fitted. The entire outer peripheral surface of the insertion port tube portion (14) is pressed into a pressing die (20) so as to be in a crimped state in which it engages with both the vertical section (11) and the horizontal section (12).
(21) plastically deforms.

In a modified embodiment also shown in FIGS. 6 to 9, a plurality of concave circumferential grooves (2
2) and the convex ridge (23) are alternately plastically worked, and the insertion sleeve portion (1) in the anchor sleeve (B) is also engaged so as to engage with both of them.
The entire outer peripheral surface of 4) is plastically deformed.

[0005]

However, in the case of the above-mentioned known invention, a small-diameter center projection (13) projecting from the distal end of the deformed reinforcing bar (A) is provided in the insertion port tube (14) in the anchor sleeve (B). ) And the widened cylindrical portion (15), the state is maintained so as to fit over the widened cylindrical portion (15) beyond the boundary step (16). Although there is an advantage that a deformed reinforcing bar anchor which is not likely to be broken can be obtained, a center convex part (13) needs to be preliminarily processed at the tip of the deformed reinforcing bar (A), which is extremely troublesome. However, the effect of mass production cannot be maximized yet.

In particular, according to the configuration of the modified embodiment, not only the center protrusion (13) but also a plurality of concave circumferential grooves (22) and convex circumferential strips (23) are provided at the tip of the deformed reinforcing bar (A). However, since the plastic working must be performed in advance, the above problem becomes more and more prominent.

In addition, by installing the center projection (13), theoretically, the insertion tube portion (14) of the anchor sleeve (B) is strongly plastic-worked into the tip portion of the deformed reinforcing bar (A). Can be made, but the insertion port (1
It is practically extremely difficult to crimp the entire outer peripheral surface of 4) at the same time to both the vertical section (11) and the horizontal section (12) of the deformed reinforcing bar (A) in a completely engaged state.

[0008] Since the adjacent gaps of the horizontal section (12) are shallow and are subdivided by the vertical section (11), only the entire outer peripheral surface of the insertion port tube (14) is swaged. In this case, it is difficult for the material to spread smoothly to every corner of the gap, and it is easy to cause insufficient engagement with both nodes (11) and (12).

In this respect, in the configuration of the modified embodiment, the adjacent gap between the concave circumferential groove (22) and the convex circumferential strip (23) in the deformed reinforcing bar (A) is subdivided by the vertical bar (11). Although there is not, just by caulking the insertion port tube portion (14) of the anchor sleeve (B) from the entire outer peripheral surface, the bite state still tends to be incomplete, and there is no change from the deformed reinforcing bar (A). Even if it does n’t come off,
There is a risk of sliding movement along the axis, and reliability and durability in use are lacking.

[0010]

SUMMARY OF THE INVENTION The present invention contemplates a further improvement of the above-described object, and a pair of opposing longitudinal bars and a constant pitch between them are provided as a deformed difference anchor which serves for this purpose. Deformed reinforcing bar with a large number of transverse bars intersecting with each other, and a thick-walled wide-opening tube portion with a base end side as a thin insertion port tube portion to the above-mentioned deformed reinforcing bar and a distal end side with a split groove for expansion As a stepped hole form of the both-end tube portion, and a cylindrical anchor sleeve in which the expanding plug is partially press-fitted into the expanding tube portion,

The insertion sleeve portion of the anchor sleeve is inserted into the distal end portion of the deformed reinforcing bar and crimped to form two side surfaces substantially parallel to a diameter line connecting both longitudinal sections of the deformed reinforcing bar. A place where the entire parallel-shaped two side faces of the insertion port cylindrical portion shaped into the entire cross-section regular even polygon and corresponding to the adjacent cross-sections of the deformed reinforcing bar are formed. By caulking partially in the above, the caulked portion is made to function as a non-slip key for locking to the above-mentioned horizontal joint.

Further, as a method of manufacturing the deformed difference reinforcing bar anchor, first, the anchor sleeve is formed by plastic working or cutting of special steel, and has a thin insertion port portion at the base end and a thick expansion at the tip end. It is shaped into a stepped hole with an opening cylinder, and a plug of a steel ingot that acts as a wedge is partially overhanged on the tip side of the expansion cylinder having the split groove for expansion. At the same time as press-fitting, insert the insertion sleeve portion of the anchor sleeve into the distal end portion of the deformed reinforcing bar having a pair of opposed vertical bars and a large number of horizontal bars intersecting at a constant pitch between them. In addition, when the insertion mouth tube portion is swaged by a swaging mold to an entire cross-section even-numbered polygon having two sides substantially parallel to a diameter line connecting both longitudinal sections of the deformed reinforcing bar, all at once. , Whose cross-section is even and parallel The point where the sides face corresponding position and mutual adjacent lateral section of the deformed bars, partially characterized by integrating caulked as slip key for locking to its transverse section,

[0013] Second, the anchor sleeve is also formed by forming or cutting a special steel with a thin-walled insertion tube at the base end and a thick-walled expansion tube at the tip end. A plug of a steel ingot that acts as a wedge is press-fitted and set in a partially overhanging state on the distal end side of the expanded-opening cylindrical portion provided with the splitting groove for expansion. After inserting the insertion sleeve portion of the anchor sleeve into the distal end portion of the deformed reinforcing bar having a large number of transverse nodes intersecting at a constant pitch between them and inserting the sleeve portion, caulking the insertion sleeve portion After being caulked by a mold into an entire cross-section even-numbered polygon having two sides substantially parallel to a diameter line connecting both longitudinal sections of the deformed reinforcing bar, the parallel two sides of the cross-section even-even polygon are formed. Adjacent phases of horizontal sections in the deformed reinforcing bar The locations corresponding to the position and between, and is characterized in that partially integrated caulking as slip key for locking to its transverse section.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show the deformed reinforcing bar anchor (product) (A), and (I) is a steel bar for concrete. A pair of longitudinal bars (11) facing each other on a diameter line (OO) from a base circumferential surface (10) of the deformed reinforcing bars having a fixed length, and a space between the longitudinal bars (11). And a large number of horizontal bars (12) that intersect while maintaining a constant pitch (P)
It overhangs by a uniform constant height (H).

In this regard, in the illustrated example, the vertical bar (11) and the horizontal bar (1) are used.
Although the staggered arrangement of (2) is shown, a lattice arrangement instead of this may be intersected. (D) shows both clauses (1
1) The outer diameter of the deformed reinforcing bar (I) including (12) is shown.

On the other hand, (S) is a cylindrical anchor sleeve made of heat-treated special steel, and its proximal end has a relatively thin insertion port tube (1) into the deformed reinforcing bar (I).
3), and the remaining tip side is a relatively thick wide-opened cylindrical portion (14), and the stepped holes in which the inner diameters (d1) and (d2) of the two-ported cylindrical portions (13) and (14) change differently. It is shaped into a form.

In this case, the inner diameter (d1) of the insertion port cylinder (13) is equal to the inner diameter (d1) of the widened opening cylinder (14).
2), which is set to be substantially equal to the outer diameter (D) of the deformed reinforcing bar (I). The boundary step (15) in the sections (13) and (14) can be locked with the tip of the deformed reinforcing bar (I). Also, it is preferable that the depth (g1) of the insertion port tubular portion (13) is dimensioned as deeply as possible, assuming that the depth (g1) is at least two pitches of the horizontal section (12) in the deformed reinforcing bar (I). .

Such an anchor sleeve (S) is formed by cutting the base end side of a thick-walled special steel pipe, starting with a stepwise cold forging or other plastic working from a special steel rod, and forming the thin-walled steel pipe. It can be easily mass-produced, for example, by finishing the insertion tube portion (13).

(16) A constant depth which does not reach the thick step-opening tubular portion (14) of the anchor sleeve (S) from the tip thereof and does not reach the boundary step (15) with the insertion port tubular portion (13). This is a split groove for expansion cut as (g2), and is distributed in a radially symmetric type such as a cross shape or a single character type as shown in the figure.

Further, (17) is the same as the wide-opened cylindrical portion (14).
A plurality of serrated concave circumferential grooves carved on the circular outer peripheral surface of
It promotes the spreading action from the tip and increases the biting force with the concrete surface.

Further, (18) is a plug of a special steel ingot which is also heat-treated and has a frusto-conical shape or a bullet shape capable of acting as a wedge, and its small-diameter base end has a cylindrical shape. As the press-fitting portion (19), it is press-fitted into the wide-opening tubular portion (14) of the anchor sleeve (S) so as not to fall off.

The large-diameter distal end of the plug (18) is in a set state in which the plug (18) projects a predetermined length (L) from the widened cylindrical portion (14), and is inserted into the widened cylindrical portion (14). When the anchor sleeve (S) is relatively advanced and moved so as to cause the expansion, the widened cylindrical portion (14) of the anchor sleeve (S) expands from the tip by the wedge action of the plug (18) and the concrete expands. It is designed to bite on the surface.

In manufacturing the deformed difference reinforcing bar anchor (A) of the present invention from the deformed reinforcing bar (I) and the anchor sleeve (S), first, the tip of the deformed reinforcing bar (I) is used. The insertion mouth tube portion (13) of the anchor sleeve (S) is inserted into the portion, and the distal end of the deformed reinforcing bar (I) is connected to the boundary step in the anchor sleeve (S) as shown in FIG. The reception is regulated by the unit (15).

Then, using a pair of facing caulking dies (20) and (21) as shown in FIGS. 6 and 7, the insertion port tube (1) in the anchor sleeve (S) is used.
The circular outer peripheral surface of 3) is pressurized, and its insertion port cylindrical portion (1) is pressed.
3) is plastically deformed into an overall hexagonal cross section.

That is, the caulking dies (20) (2)
The pair of (1) has a half-shape that becomes a regular hexagonal cross section when closed as shown in FIG. 8, and furthermore, it has a substantially hemispherical caulking projection (22) from the flat inner surface facing the pair.
(23) are overhanging.

For this reason, a pair of caulking dies (20) (2) is formed by using the diameter line (OO) in which both the vertical bars (11) of the deformed reinforcing bar (I) exist as a parting line.
1) are faced to each other as shown in FIGS. 9 and 10, and the insertion port tube portion (13) of the anchor sleeve (S) is deformed to the deformed reinforcing bar (I).
By crimping, plastic deformation into an overall hexagonal cross section having two sides (a) and (b) substantially parallel to the diameter line (OO) is performed at once, and at the same time, the two sides (a )
The part where (b) is located in the deformed reinforcing bar (I) at a position corresponding to the space between adjacent ones of the horizontal sections (12) is defined by the processing die (20).
The caulking is performed in a continuous spot as if further pressed by the caulking projections (22) and (23) of (21).

In other words, the caulking projections (22) and (23) of the caulking dies (20) and (21) correspond to the adjacent portions of the horizontal bar (12) in the deformed reinforcing bar (I). The projecting portion is distributed correctly in advance at the position, so that the spot portion crimped in a depressing manner is inserted into the insertion tube portion (13) with respect to the horizontal section (12) of the deformed reinforcing bar (I). Anti-slip key (24)
As (25), the anchor is firmly integrated with the transverse section (12), and high tensile strength can be imparted to the deformed difference anchor (A).

In this case, as shown in the figure, the insertion port tube portion (13) of the anchor sleeve (S) is inserted deeply by at least two pitches of the horizontal section (12) in the deformed reinforcing bar (I) and fitted. Above, the insertion tube section (13)
Is crimped into an entire regular hexagonal cross section, and the two side surfaces (a) and (b) of the regular hexagonal cross section are deformed reinforcing bars (I).
At least four positions corresponding to adjacent ones of the horizontal joints (12) in (1) and (2), (23)
The above effect can be further improved by the multiple non-slip keys (24) and (25) which are partially and continuously caulked.

Further, it is also possible to plastically deform adjacent ones of the caulking portions functioning as the non-slip keys (24) and (25) in a linked state straddling the horizontal section (12) of the deformed reinforcing bar (I). It is.

However, in the illustrated example, the insertion mouth tube portion (13) of the anchor sleeve (S) is attached to the tip of the deformed reinforcing bar (I).
When the entire cross-section is crimped to a regular hexagon, the two side surfaces (a) and (b) are caulked at the same time, and the convex (22)
According to the method (23), the caulking is partially and continuously integrated. However, these steps may be performed in two steps, that is, sequentially and stepwise.

Incidentally, the regular hexagonal cross section of the insertion port tube portion (13) is merely an example of the most suitable plastically deformed shape, and a regular octagonal cross section, a regular decagonal cross section, or another cross section is used instead. A regular even polygon may be employed.

In any case, the deformed reinforcing bar anchor (A) of the present invention manufactured as described above is used, for example, in the construction work of a concrete block wall, by embedding holes (D) drilled in the concrete surface (C). 26), the anchor sleeve (S) at the distal end is inserted and used as shown in FIG.

Then, the deformed reinforcing bar (I) exposed from the concrete surface (C) is driven in with a hammer (27) or the like, so that the plug is stretched and stopped at the bottom of the embedding hole (26). Since the anchor sleeve (S), which is integral with the deformed reinforcing bar (I), moves forward relative to (18), the widened cylindrical portion (14) of the anchor sleeve (S) is moved as shown in FIG. It expands from the tip and is fixed to the concrete surface (C) in a non-separable manner, forming a high-strength skeleton of the concrete block wall.

In the working process, the vertices (X) of the insertion mouth tube portion (13) plastically deformed into an even-numbered polygonal section of the anchor sleeve (S) are, as apparent from FIG. ) Serves as an even support ridge line inscribed in the opening circle, so that the deformed reinforcing bar (I) can be stably maintained in an accurate upright state, and the hammer (27)
Can be applied without loss.

Further, the insertion port tube portion (13) of the anchor sleeve (S) is firmly locked and integrated with the transverse section (12) of the deformed reinforcing bar (I) via non-slip keys (24) and (25). Therefore, even if a tensile force is applied during the use of the deformed difference reinforcing bar anchor (A), the anchor sleeve (S) and the deformed reinforcing bar (I) do not come off, and their relative slippage does not occur. There is no danger of movement, and a highly reliable and durable fastening state can be obtained.

[0036]

As described above, in the deformed difference muscle anchor according to the present invention, due to its structure, a pair of longitudinal segments (11) facing each other and a large number of transverse segments (1) intersecting each other while maintaining a constant pitch (P) therebetween. 12), and a thick wall having a base portion as a thin insertion tube portion (13) into the deformed reinforcing bar (I) and a distal end having an expanding groove (16). The wide-opening cylinder (14) is formed in the form of a stepped hole in each of the two-sided cylinders (13) and (14).
4) a cylindrical anchor sleeve (S) in which the expanding plug (18) is partially press-fitted and set;

The insertion sleeve portion (13) of the anchor sleeve (S) is inserted into the distal end portion of the deformed reinforcing bar (I), and then crimped, and then crimped to form both longitudinal sections (11) of the deformed reinforcing bar (I). ) Is formed into an entire cross-section even-numbered polygon having two side surfaces (a) and (b) substantially parallel to the diameter line (OO) connecting them, and the insertion port is formed into the cross-section even-even polygon. Two parallel side surfaces (a) and (b) of the cylindrical portion (13)
Is continuously caulked at a position corresponding to a space between adjacent ones of the horizontal bars (12) in the deformed reinforcing bar (I), whereby the caulked portion is connected to the horizontal bars (1).
Since it functions as the non-slip keys (24) and (25) to be locked to 2), there is an effect that the problem of the prior art described at the beginning can be surely improved.

That is, according to the above-mentioned structure of the present invention, the insertion sleeve portion (13) of the anchor sleeve (S) connects the diameter bar (O) connecting the opposed vertical bars (11) of the deformed reinforcing bar (I).
-O) is crimped to the tip of the deformed reinforcing bar (I) as an overall polygon of even cross section having two side surfaces (a) and (b) substantially parallel to -O). The side surfaces (a) and (b) further have horizontal sections (1) in the deformed reinforcing bar (I).
2) The crimping is carried out in a continuous spot at a position corresponding to the adjacent ones of 2), and the crimping portion is used as a non-slip key (24) (25), and a transverse section (12) of the deformed reinforcing bar (I). Since the anchor is firmly locked and integrated, it can be provided as a deformed difference bar anchor (A) having excellent tensile strength and durability.

In particular, if the configuration of claim 2 is adopted,
In addition to being able to enhance the above-mentioned effects more and more, since the regular hexagonal cross section is the most efficiently plastically deformed shape, it is extremely easy to mass-produce the deformed difference anchor (A) of the present invention. Become.

In producing the deformed difference muscle anchor (A), if the method according to claim 3 is adopted,
Using the relatively simple caulking dies (20) and (21), there is an effect that mass production can be performed in one step at low cost.

Further, if the manufacturing method of the fourth aspect is adopted, even for the deformed reinforcing bar (I) in which the intersecting form of the vertical section (11) and the horizontal section (12) changes differently, the anchor sleeve (I) can be used. The insertion port tube portion (13) of S) can be easily swaged, and there is an effect that the change is excellent in responsiveness.

[Brief description of the drawings]

FIG. 1 is a side view showing a deformed difference muscle anchor of the present invention.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG.

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG.

FIG. 5 is a partially broken side view showing a disassembled state of the deformed difference muscle anchor.

FIG. 6 is a partially broken side view showing a corresponding positional relationship between a state in which an anchor sleeve is inserted and fitted in a deformed reinforcing bar and a caulking die.

FIG. 7 is an enlarged front view of a partly broken section corresponding to FIG. 6;

FIG. 8 is a partially broken perspective view showing a caulking die extracted.

FIG. 9 is a partially broken side view showing a crimped state of the anchor sleeve.

FIG. 10 is an enlarged sectional view taken along line 10-10 of FIG. 9;

FIG. 11 is an explanatory view showing a process of embedding and using a deformed difference muscle anchor.

FIG. 12 is an explanatory diagram showing an embedding completion state.

FIG. 13 is an enlarged sectional view taken along line 13-13 of FIG.

[Explanation of symbols]

 (11) ・ Vertical section (12) ・ Horizontal section (13) ・ Insertion tube section (14) ・ Expansion tube section (16) ・ Split groove (18) ・ Plug (24) ・ Non-slip key (25) ・Non-slip key (A), deformed reinforcing bar anchor (I), deformed reinforcing bar (S), anchor sleeve (P), constant pitch (a), side surface (b), side surface (OO), diameter line

Claims (4)

[Claims] 1. A deformed reinforcing bar (I) having a pair of longitudinal bars (11) facing each other and a number of horizontal bars (12) intersecting each other while maintaining a constant pitch (P) therebetween. As a thin-walled insertion tube portion (13) into the deformed reinforcing bar (I), a thick-walled expansion tube portion (14) having a split groove (16) for expanding at the tip end, and a double-walled tube portion (14) thereof. 1
3) A cylindrical anchor sleeve (S) formed into a stepped hole form of (14), and the expansion plug (18) is partially press-fitted and set in the expansion tube part (14). The insertion sleeve (13) of the anchor sleeve (S)
Is inserted into the tip of the deformed reinforcing bar (I) and crimped to form a two-sided surface substantially parallel to a diameter line (OO) connecting both longitudinal sections (11) of the deformed reinforcing bar (I). (A) A parallel two-sided surface (a) (b) of an insertion port cylinder (13) formed into an entire cross-section polygon having an even-numbered polygon having (b), and formed into a cross-section even-even polygon. By partially and continuously caulking the adjacent portions of the horizontal bars (12) in the deformed reinforcing bar (I) at the corresponding positions.
A deformed difference muscle anchor characterized in that the crimped portion functions as a non-slip key (24) (25) for locking the horizontal section (12). 2. The insertion tube section (13) of the anchor sleeve (S) is inserted into the distal end of the deformed reinforcing bar (I) by the transverse section (1).
2) By inserting and crimping at least two pitches in step 2) and crimping, two side faces (a) substantially parallel to a diameter line (OO) connecting both longitudinal sections (11) of the deformed reinforcing bar (I). (B) is formed into a general hexagonal cross-section, and the insertion port cylindrical part (1
By caulking the parallel two side surfaces (a) and (b) of 3) partially and continuously at least at four positions corresponding to adjacent spaces between the horizontal bars (12) in the deformed reinforcing bar (I). , And all the caulked parts,
Non-slip keys (24) and (25) that overlap and lock to 2)
The deformed difference muscle anchor according to claim 1, wherein the anchor is made to function. 3. An anchor sleeve (S) is formed by plastic working or cutting of special steel into a thin insertion tube part (13) on the base end side and a thick expanded tube part (14) on the front end side. The widened cylindrical portion (1) is formed into a stepped hole shape provided with a widened split groove (16).
4) At the same time, a plug (18) of a steel ingot acting as a wedge is press-fitted and set in a partially overhang state on the tip side, and a pair of opposed vertical bars (11) and a constant pitch (P) between them. The insertion tube portion (13) of the anchor sleeve (S) is inserted into the distal end portion of the deformed reinforcing bar (I) having a large number of transverse sections (12) that intersect with each other, and the insertion hole is inserted. Die (20) for caulking cylindrical part (13)
According to (21), both longitudinal sections (11) of the deformed reinforcing bar (I)
Two side surfaces (a) substantially parallel to the diameter line (OO) connecting
At the same time as the entire cross-section even polygon having the cross section (b) is crimped, the parallel two side faces (a) and (b) of the cross section even-even polygon have the horizontal joints (I) in the deformed reinforcing bar (I). A deformed difference bar characterized by partially caulking and integrating a portion corresponding to an adjacent one of the above 12) as a non-slip key (24) (25) to be locked to the transverse section (12). Anchor manufacturing method. 4. An anchor sleeve (S) is formed by plastic working or cutting of special steel into a thin-walled insertion tube portion (13) at the base end and a thick-walled expansion tube (14) at the front end. The widened cylindrical portion (1) is formed into a stepped hole shape provided with a widened split groove (16).
4) At the same time, a plug (18) of a steel ingot acting as a wedge is press-fitted and set in a partially overhang state on the tip side, and a pair of opposed vertical bars (11) and a constant pitch (P) between them. The insertion tube portion (13) of the anchor sleeve (S) is inserted into the distal end portion of the deformed reinforcing bar (I) having a large number of transverse sections (12) that intersect with each other, and the insertion hole is inserted. Die (20) for caulking cylindrical part (13)
According to (21), both longitudinal sections (11) of the deformed reinforcing bar (I)
Two side surfaces (a) substantially parallel to the diameter line (OO) connecting
After crimping on the entire cross-section regular even polygon provided with (b), the parallel two side surfaces (a) and (b) of the cross-section regular even polygon are connected to the transverse section (12) in the deformed reinforcing bar (I). Characterized in that the portions corresponding to adjacent ones of (1) and (2) are partially crimped and integrated as non-slip keys (24) and (25) for locking to the transverse section (12). Manufacturing method.