JP2000161317A - Fastening fixture of cross bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fasten a bar material with a small number of part items and in a single operation. SOLUTION: A body 10 has a U shape cross section, and forms a hook shaped hole 14 facing to the side wall 10-1. A bolt 12 is screwed in the bottom 10-2 of the body 10. A bar holder 20 is provided integrally with the main body 10 and is connected to the base 10-1 of the body 10 through a thin curved part 22. One bar material R1 is introduced into a channel and the other bar material R2 is introduced into the hook shaped hole 14. Fastening of the bolt 12 causes to press the crossed part of the bar on the bar holder 20, to press the bar material R2 on the lower inside edge of the hook shaped hole 14, and to bind the bar materials R1 and R2 in the cross state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal fitting for crossing steel strips such as steel wires and steel rods and binding them together at the crossing portions.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 3-4009 discloses a metal fitting for crossing strips and binding them together at the crossing, which includes upper and lower substrates each forming a concave groove. ing. The concave grooves of the upper and lower substrates are formed in a crossing direction, and while the strips are accommodated in the concave grooves of the upper and lower substrates in a crossed state, the upper and lower substrates are formed with the crossed material interposed therebetween. It is tightened by two bolts arranged so as to sandwich the material.

Another prior art is disclosed in Japanese Patent Application Laid-Open No. Hei 4-10270.
No. 8, which is similar to JP-A-3-4009 in that a strip is sandwiched between upper and lower substrates having concave grooves, but dedicated upper and lower substrates are used for each strip. Each of the strips is sandwiched between the upper and lower substrates.

As another prior art, Japanese Utility Model Registration No. 3035297 has a U-shaped curved portion in the middle and a linear body having bolt portions formed at both ends, and the U-shaped curved portion is crossed with a strip. A metal fitting for fastening a strip by screwing a nut to a bolt portion via an elongated plate is disclosed. Further, Japanese Utility Model Registration No. 3035297 provides first and second U-shaped plates having hook-shaped hole-shaped engaging portions to be engaged with respective strip members, and the first and second U-shaped plates are provided. It discloses a technique in which crossing members engaging with hook-shaped hole-shaped engaging portions are fastened by fastening a template with bolts and nuts.

[0005]

In JP-A-3-4009 and JP-A-4-102708, the strip is sandwiched between the substrates by a plurality of bolts. The use of multiple separate parts increases the number of parts and increases the cost. In addition, because multiple parts are separated, workability is not good, and one-touch fastening of crossover members is possible. Can not be done. The utility model registration No. 3035297 also uses a separate member that is fastened by screws, and requires two-handed work, so that workability is not good and one-touch work cannot be performed.

SUMMARY OF THE INVENTION In view of the above problems of the prior art, it is an object of the present invention to reduce the number of parts and to enable one-touch fastening of a strip.

[0007]

According to the present invention, there is provided a cross-bar tying member comprising a main body having an opening into which the crossed bar is inserted, and a screw fastener screwed to the main body. The main body has an engaging portion at at least one pair of symmetrical portions sandwiching the crossing portion of the strip, and a strip restraint is disposed between a tip end of the screw fastener and the crossing portion of the screw, and At the time of fastening, the bar is pressed against the engaging portion by pushing the crossing portion of the bar through the bar restraining by the tip of the screw fastener,
The strip members are fixed to each other, and the strip members are integrally connected to the main body via a connecting portion that allows displacement of the strip members with respect to the main body.

According to the present invention, the strip can be firmly fixed to the main body only by inserting the strip into the main body through the opening at one end in a crossed state and fastening the screw fastener. Therefore, the number of parts of the fastener can be reduced, and one-touch operation is possible from the viewpoint of workability.

In the present invention, the connecting portion may be a thin portion or a notch.

[0010]

1 and 2 show a fastening device according to a first embodiment of the present invention. This fastening device has a U-shaped cross section (the U cross section has a rounded bottom shape). (Good) main body 10 and fastening bolts 12. The main body 10 as a molded product of a steel plate includes a base 10-1 and a pair of side walls 10-2. A channel 13 is formed between the pair of side walls 10-2, and one strip R1 is introduced along the channel 13 as shown in FIG. Hook holes 14 are formed in the pair of side walls 10-2.
One end of 4 extends to the edge of the side wall 10-2, so that the other member R2 can be introduced in a direction perpendicular to the channel 13. In this introduction portion of the strip material R2, the portion of the side wall 10-2 serving as the lower edge of the hook-shaped hole 14 projects toward the upper edge of the hook-shaped hole 14 facing to decrease the width of the hook-shaped hole 14, and The portion forms the hook 16. Engagement of the hooking claw 16 with the strip R2 makes it possible to reliably restrain it. The fastening bolt 12 is screwed into a nut 18 which is welded and fixed to the base 10-1 of the main body 10, and a hole 10 formed in the base 10-1.
-2 protrudes into the channel 13. It goes without saying that a screw hole may be formed in the main body 10 instead of the nut 18.

The strip holder 20 functions to accommodate the strip R1 on its upper surface side and to transmit the fastening force of the bolt 12 in an appropriate manner in the longitudinal direction of the strip R1. Strip holder 20 is strip
The cross section has a U-shape that opens downward to accommodate the upper surface side of R1, and has a downward arch shape in the length direction (the direction in which the strip R1 extends). Strip holder 20 is body 1
The base 10 of the main body 10 is provided via a thin-walled curved portion 22 (which is thinned by forging a material as described later) as a connecting portion that allows displacement of the strip member 20 with respect to zero with a small force. -1 is integrally connected to one end face.

FIG. 4 shows a material in an unfolded state obtained by punching, which is appropriately cut out of a plate material.
A hook-shaped hole 14 and a bolt passage hole 10-2 are also formed in the first portion 30 which is the main body 10. A second portion 32 protrudes from the central portion of the first portion 30 in a belt shape, and the strip member 20 and the connecting portion 30 are formed from the second portion 32 in a belt shape. That is, in the second portion 32, the portion 30-1 (the portion between the broken lines a and b) that becomes the thin curved portion 22 is made thinner than other portions of the material by receiving forging pressure.
Next, the portion 30-2 (the material portion outside the broken line b) has a U-shaped cross section and has an arcuate shape. Next, the portion 30-1 whose thickness has been reduced by forging is bent into a U-shape. Finally, the first portion 30 is bent along the dashed lines c and d, and the thin curved portion 2 is added to the strip member 20 shown in FIGS.
Thus, the shape of the main body 10 integrally connected via the two is obtained.

Next, a description will be given of a fastening operation of the crossing portion of the strips R1 and R2 by the tie in the first embodiment shown in FIGS. 1 to 3. The main body 10 located above the crossing portion is The channel 13 is pushed in parallel with one of the strips R1. Then, one of the strips R1 is introduced into the channel 13, and the strip R1 is accommodated in the U-shaped groove of the strip holder 20 at the upper part thereof. On the other hand, the other strip material R2 is opposed to the narrowed portion of the entrance of the hook-shaped hole 14. In this state, the other member R2 is accommodated in the hook-shaped hole 14 by slightly shifting the main body 10 forward in the direction crossing the channel 13. By tightening the bolt 12 in this state, the tip end of the bolt 12 hits the bar member 20, and the bar member 20 has a thin curved shape at the connecting portion 22 and is easily deformed. It is displaced downward and presses the strip R1 downward, whereby the portion of the strip R2 crossing the strip R1 is also displaced downward.
As a result, by continuing the fastening of the bolt 12, the lower strip R2 is pressed against the lower inner edge of the hook-shaped hole 14 on both sides of the intersection C. Therefore, the strip members R1 and R2 can be fastened in a crossed state. The fastening force of the bolt 12 is not directly applied, but is applied to the intersection of the strips R1 and R2 via the strip holder 20. Therefore, the force applied to the strip R1 by the bolt 12 is distributed in the length direction of the strip holder 20, so that the strip R1
It is possible to prevent a large force from being applied locally to the horn. Further, since the strip R1 can be slightly bent by the strip holder 20, the bite of the strips R1 and R2 increases, and there is an effect that a reliable crossing state of the strips can be secured.

Here, even if the strip holder 20 is separate from the main body 10, the function of dispersing the pressing force on the strip can be ensured. However, as in this embodiment, by integrating the strip holder 20 into the main body by the thin curved portion 22, it is necessary to carry and pre-attach another component (strip holder) which is required as a separate product. The work is completed only by tightening the bolts, and the number of work steps can be reduced. In addition, there is no possibility of the strip member being dropped during the work, and the workability can be improved also in this respect.

Further, as already described with reference to FIG. 4, in the process of forming the main body 10, the strip member can be formed by removing the same material from the same material and can be formed by a series of steps using one press machine. It can be manufactured all at once, and the manufacturing cost can be reduced.

FIGS. 5 to 7 show a second embodiment of the present invention, and the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals and their description is omitted. The difference is that the bar holder 20 is slightly reduced by providing a notched bent portion 40 instead of an integral thin curved portion as shown in FIGS. 1 to 3 at the connecting portion between the bar holder 20 and the main body 10. It can be displaced with a great force. That is, the bent portion 40 is cut off from both sides of the width as shown by 40-1 and is bent in a V-shape at the cutout portion. Therefore, the bent portion 40 is easily deformed in the notch portion 40-1 by the tightening force of the bolt 12, and the strip members R1 and R2 are formed by the tightening force of the screws applied to the cross portions of the strip members R1 and R2 by the strip member 20. Are tied to each other.

FIG. 8 shows the shape of the expanded state after punching from the main body in the second embodiment of FIGS. A notch 40-1 is already formed at the time of punching in a portion 30-1 between the broken lines a and b of the second portion 32 protruding from the center of the first portion 30. The portion 30-2 outside the broken line b is formed in a U-shaped cross section as in the first embodiment and is provided with an arch, thereby serving as the strip member 20 as described above. Thereafter, the narrowest part of the portion 30-1 is bent along the broken line e and bent along the broken lines a and b, and finally the U shape of the main body is obtained by bending along the broken lines c and d. .

FIG. 9 shows a third embodiment, which is a modified structure of the first embodiment and corresponds to FIG. 2 of the first embodiment. As shown in FIG. 9, the base 10-1 of the main body 10 is formed so as to protrude from the portion of the through hole 10-3 of the bolt 12, thereby forming the concave portion 40 on the inner surface side of the base 10-1 of the main body 10. Then, the nut 18 is accommodated in the recess. The other points are the same as those of the first embodiment shown in FIGS. 1 to 3 and the description is omitted.

In the third embodiment, since the nut 18 is held by being housed in the recess 40, the body 1
Since welding for fixing to zero is not required, there is an advantage that cost can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cross-bar tying member according to a first embodiment of the present invention.

FIG. 2 is a side view of the cross-bar ties of FIG. 1;

FIG. 3 is a front view of the cross-bar tying member of FIG. 1;

FIG. 4 is a view showing the main body of the first embodiment in an unfolded state punched out of a sheet material before molding.

FIG. 5 is a perspective view of a cross-bar tying member according to a second embodiment of the present invention.

FIG. 6 is a side view of the cross-bar tying member shown in FIG. 5;

FIG. 7 is a front view of the cross-bar tying member of FIG. 5;

FIG. 8 is a view showing the main body of the second embodiment in an unfolded state punched out from a plate-like material before molding.

FIG. 9 is a cross-sectional view of a cross-bar tying member according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Main body 12 ... Fastening bolt 13 ... Channel 14 ... Hook-shaped hole 16 ... Hooking claw 20 ... Strip member holding 22 ... Thin-walled curved part 40 ... Notched bent part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Nobuyoshi Katsumata 19-1 Gomijima, Fuji City, Shizuoka Prefecture F-term in Unipres Co., Ltd. (reference) 3J039 AA06 BB01 CA01 GA02 GA08 JA08 JA16

Claims (3)

[Claims] 1. A main body having an opening through which a crossed strip is inserted, and a screw fastener screwed into the main body, wherein the main body has at least one pair sandwiching a crossing portion of the crossed material. Has an engaging portion at a symmetrical portion of the screw fastener, and a strip restraint is disposed between the tip of the screw fastener and the strip crossing portion. When the screw fastener is fastened, the thread restraint is applied by the tip of the screw fastener. When the crossing portion of the strip is pressed, the strip is pressed against the engaging portion, the strips are fixed to each other, and the strip is held in the main body by a connecting portion that allows displacement of the strip to the main body. A cross-bar tying member, which is integrally connected via a wire. 2. The cross-member tying member according to claim 1, wherein the connecting portion is a thin portion. 3. The cross-member tying member according to claim 1, wherein the connecting portion is a notch.