JP2000045203A - Connecting member for concrete block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting member for a concrete block hardly causing misregistration and hardly reducing the drawing strength in manufacturing the connection block. SOLUTION: This connecting member A connects single-element concrete blocks at some intervals so as to be a connection block for laying. The connecting member A employs wire pieces 1 cut from a wire formed by stranding a lot of metal wires as a material, the diameters of the both ends are enlarged so as to form swelling parts 2, 2 for pull-out prevention, and the diameter of the intermediate part in the length direction of the wire is enlarged so that a pair of lock swelling parts engaged with the both faces of a partition wall used in manufacturing the connection block are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a connecting member for a concrete block. More specifically, the present invention relates to a connecting member for connecting adjacent single blocks with a gap therebetween so as to form a continuous joining block laid on a pavement, a revetment of a river, a slope of a lands, and the like.

[0002]

2. Description of the Related Art FIG.
As shown by a symbol, a plurality of concrete unit blocks 101 are arranged with a gap 102 therebetween, and adjacent blocks 101 are connected to each other by a connecting member 103 arranged so as to cross the gap. Block 1
04 is disclosed. As shown in FIG. 8, the connecting member 103 used here is provided at both ends thereof with a slip-off preventing portion 105.
The groove 106 is formed somewhat inward from both ends of the columnar rod material to form a groove. Since such a connecting member 103 is usually made of a synthetic resin such as polyvinyl chloride, the connecting member 103 has a certain degree of flexibility itself. In some cases, they can be swingably connected. The connecting member 103 can be made of metal such as rubber or aluminum, in addition to synthetic resin. Further, for wall tiles, there have been proposed ones provided with retaining portions at both ends of a wire formed by twisting metal wires (Japanese Unexamined Patent Application Publication No. Hei 9-1997).
No. 302887).

A method of manufacturing the above-described continuous joining block 104 is described in, for example, Japanese Patent Application Laid-Open No. H8-1627 in addition to the above-mentioned patent publication.
This is disclosed in detail in Japanese Patent Publication No. According to the method, a concrete material is poured into a concave portion 109 in which a portion where the gap 102 is to be formed is partitioned by a partition wall 108, and is hardened while applying vibration, and is further cured and completed.
At this time, the center of the connecting member 103 is placed on a substantially semicircular groove 110 formed in the partition wall 108, and the connecting member 103
Are prevented from being embedded in the blocks 101 on both sides.

[0004]

SUMMARY OF THE INVENTION In the above-described conventional method of manufacturing the continuous joining block 104, the connecting member 1 is attached to the partition wall 108.
When the concrete material is poured with the central part of the joint member 03 in place, and when vibration is applied thereafter, the connecting member 103
May be shifted in the axial direction. In this case, the strength of the connection member coming off the block is reduced. Therefore, it is necessary to proceed with the work while correcting the position with your finger,
The man-hours increase and the cost increases. An object of the present invention is to provide a connecting member for a concrete block that is less likely to be displaced during the production of a continuous joining block and that is less likely to decrease in pull-out strength.

[0005]

The connecting member according to the present invention has a rod-like form provided with a bulging portion at each end for preventing slip-off, and connects adjacent single blocks with a gap therebetween so as to be connected for installation. A connecting member for forming a joining block, wherein a pair of engaging portions that engage with both surfaces of a partition wall used at the time of manufacturing the joining block are provided at an intermediate portion in the length direction. .

In such a connecting member, it is preferable to use a cut piece of a wire in which a large number of metal wires are twisted as a material, and expand both ends of the cut piece to form the enlarged portion for preventing the detachment. Further, it is preferable that the locking portion is formed by expanding the diameter of a wire.

[0007]

The connecting member of the present invention is mounted on the partition wall such that the portion between the locking portions is fitted into the groove of the partition wall. In this state, even if the scale is displaced in the axial direction, the locking portion on that side engages with the side surface of the partition wall and does not come off any more. And since there are a pair of locking portions, they do not shift to either side. Therefore, even when vibration is applied to the concrete material, the concrete material does not shift in the axial direction, and the pull-out strength does not decrease.

Since the connecting member of the second aspect is made of a wire, it has high flexibility and tensile strength, and is easy to manufacture. In addition, if the strands are loosened at the enlarged portions at both ends, the bonding strength to concrete increases. In the connecting member according to the third aspect, the locking portion can be processed together with the enlarged portion for retaining, so that it can be manufactured at low cost. In addition, in the case where the wires are loosened at these locking portions, the bonding strength to concrete increases.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the connecting member of the present invention will be described with reference to the drawings. 1 is a perspective view showing one embodiment of the connecting member of the present invention, FIGS. 2a and 2b are cross-sectional views taken along the line IIa-IIa and IIb-IIb of FIG. 1, and FIG. 4 is a perspective view showing the use of the connecting member, FIG. 5a is a side view showing another embodiment of the connecting member of the present invention, FIG. 5b is a sectional view taken along the line VV of FIG. 5a, and FIG. 6 and 6b are side views showing still another embodiment of the connecting member of the present invention.

The connecting member A shown in FIG. 1 has a wire piece 1 made of a metal stranded wire, formed with enlarged portions 2 and 2 at both ends of the wire piece 1, and a pair of enlarged portions 3 for locking at a center portion. 3 is formed. The wire piece 1 has, for example, an outer diameter of 0.135.
A strand 5 formed by twisting seven strands 4 of about 0.55 mm and further formed by twisting seven strands may be used. In the embodiment shown in FIG. 1, seven strands are Z-stranded to form a strand 5, and as shown in FIG. 2a, the strand 5 is further twisted to S for seven strands to form a wire. Is cut into a predetermined length to form a wire piece 1. However, the direction of twist, the outer diameter and the number of strands and strands are not limited to those described above.

The connecting member A is manufactured, for example, by a process shown in FIG. 3A. In step I of FIG. 3a, first, the continuous wire 6 is cut into the finished product dimensions (for example, 90 to 160 mm).
To form a wire piece 1 having a predetermined length. Then, the wire piece 1 is placed in a mold (7,
8) (Step II). The molds (7, 8) are divided into an upper mold 7 and a lower mold 8, and vacancies 9, 10 are provided at positions where the enlarged parts 2, 3 are to be formed, and the wire pieces do not spread in other parts. Thus, a cylindrical cavity having the same diameter as the diameter of the wire piece is provided.

When the wire piece 1 is accommodated in the lower die 8 and the upper die 7 is pressed against the lower die, the periphery except for the cavities 9 and 10 is substantially sandwiched between the die and restrained. However, the restriction may be such that the wire piece 1 can slide in the axial direction. Then, push both ends of the wire piece 1 in the axial direction, and
Buckling occurs at the portion of 0 (arrow P in step II). Then, each strand 5 expands radially outward, and the enlarged portions 2 and 3 are formed (step III). The huge part 2, 3
Inside is somewhat hollow, as in FIG. 2b,
The arrangement of the strands 5 and the strands 4 is disturbed and there is a gap. In particular, since the enlarged portion 2 for preventing slipping is at the end of the wire piece 1, the end of the strand or the wire is spirally spread (see FIG. 1).

The connecting member A manufactured as described above is mounted on a partition wall 12 of a formwork 11 for manufacturing a continuous joining block, as shown in FIG. At this time, the portion 13 between the pair of locking enlarged portions 3 at the intermediate portion of the connecting member A (step 13 in FIG.
III), the semicircular groove 1 formed in the partition wall 12.
Fit into 4. Next, the concrete material is poured into the concave portion 15 of the formwork 11. At this time, the concrete material is poured while giving vibration to the form by a vibrator or the like so that the aggregate of the concrete material is not unevenly distributed.

However, the inner surface 3 of the locking bulge 3, 3
a has a shape sandwiching both sides of the partition wall 12 (FIG. 3).
3)), the connecting member A is
Does not shift in the axial direction. Or, even if it is slightly displaced, it stops at the position where it comes into contact with the locking bulging parts 3, 3 and does not displace further. As described above, the enlarged portions 2 and 2 for retaining are sufficiently separated from the end surface of the concrete block (single block) formed in a shape corresponding to the concave portion 15, so that the retaining operation is reliably performed. Therefore, in the obtained continuous joining block, the single blocks are firmly connected by the connecting member A for a long time. In addition, the labor for correcting the position of the connecting member when manufacturing the continuous joining block is omitted, and the number of steps is reduced.

Further, as shown in FIG.
Since the strand 5 and the strand 4 are loosened in the portion 3, the concrete material enters between them, and there is also an advantage that the bonding strength between the concrete block and the connecting member A is further increased.

The connecting member B shown in FIGS. 5A and 5B is formed by caulking and fixing C-shaped rings 16 and 16 to both ends of the wire piece 1, thereby forming an enlarged portion for retaining.
Further, a pair of C-shaped rings 17, 17 are fixed by caulking at an intermediate portion at an interval t corresponding to the thickness of the partition wall, and an inner end face 17a forms an enlarged portion for locking. . The C-shaped rings 16, 17 are as shown in FIG.
It is a metal ring such as steel formed in a C-shape with a gap 18 left.
8 is reduced, the inner diameter is reduced, and the wire piece 1 is fixed while slightly depressing the surface thereof. C-shaped ring 1
6 and 17 can be manufactured by stamping a metal plate or bending a steel wire into a C shape. In some cases, a commercially available E-ring or C
Rings, C-ringers, etc. can also be used.

The connecting member B also has the same effect as the connecting member A in which the bulging portion is formed due to the buckling described above, that the connecting member B does not shift on the partition wall during the manufacturing of the connecting block. Although the number of parts is larger than that of the connecting member A described above, an enormous portion having an arbitrary shape can be formed, and there is an advantage that the effect of preventing the slipping out and the effect of preventing displacement can be enhanced.

The connecting member C shown in FIG. 6A has a partition wall at the middle of a conventional synthetic resin connecting member (see FIG. 8) having a groove 20 near the end so as to leave the retaining portion 19 at both ends. And a groove or an annular concave portion 21 having a width corresponding to the above.
This is a locking portion in which the step portion 21a inside the annular concave portion 21 is engaged with the side surface of the partition wall.

The connecting member D shown in FIG. 6B is formed by cutting a metal bar such as steel or aluminum into a predetermined length, and forging a header or the like to form the enlarged portions 23, 23 for preventing the ends from coming off.
And an enlarged portion 24, 24 for locking the intermediate portion. These enlarged parts can be manufactured by the same processing method as in FIG. 3 for a metal round bar piece. Further, it can also be manufactured by clamping between a half of the connecting member D and a mold having a cavity of the same shape. In that case, the portion 25 between the bulges is somewhat smaller than the diameter of the original bar piece.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a connecting member of the present invention.

FIGS. 2a and 2b respectively show IIa-
FIG. 2 is a cross-sectional view taken along line IIa and IIb-IIb.

FIG. 3 is a process chart showing a method for manufacturing the connecting member.

FIG. 4 is a perspective view showing how to use the connecting member.

5A is a side view showing another embodiment of the connecting member of the present invention, and FIG. 5B is a sectional view taken along line VV of FIG. 5A.

FIGS. 6a and 6b are side views each showing still another embodiment of the connecting member of the present invention.

FIG. 7 is a perspective view showing an example of a continuous joining block in which the connecting member of the present invention is used.

FIG. 8 is a perspective view showing an example of a conventional connecting member and a method of manufacturing a connecting block using the connecting member.

[Explanation of symbols]

 Reference Signs List A Connecting member 1 Wire piece 2 Enlarged portion (for retaining) 3 Enlarged portion (for locking) 3a Inner surface 4 Element wire 5 Strand 6 Wire 11 Formwork 12 Partition wall 14 Groove 15 Depression B Connecting member 16 C-shaped ring (For retaining) 17 C-shaped ring (for locking) 17a End face C Connecting member 19 Retaining portion 20 Groove 21 Annular concave portion 21a Step D Connecting member 23 Enlarged portion (for retaining) 24 Enlarged portion (for locking)

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masanori Serita 1-15-15 Idana, Miyagino-ku, Sendai-shi, Miyagi F-term in Shinko Kozai Co., Ltd. 2D051 AF11 DA01 DB15

Claims (3)

[Claims] 1. A connecting member having a rod-like form having enlarged portions at both ends for preventing slip-off, and connecting adjacent single blocks with a gap therebetween to form a continuous joining block for installation. A concrete block connecting member having a pair of engaging portions provided at an intermediate portion in a longitudinal direction thereof so as to engage with both surfaces of a partition wall used for manufacturing a continuous joining block. 2. The connecting member according to claim 1, wherein a cut piece of a wire in which a number of metal wires are twisted is used as a material, and both ends of the cut piece are expanded to form the enlarged portion for preventing the detachment. 3. The connecting member according to claim 2, wherein the locking portion is formed by expanding a diameter of a wire.