JPS631715Y2 - - Google Patents

Description

[Detailed description of the invention] When screwing the base end screw hole of a conventional concrete formwork clamping rod into a screw protruding from the dam plate of a separator with a terminal, and then tightening and fixing the dam plate using the terminal and the clamping rod, Since the feed of the attachment rod is slow and the transition length is long, the tightening rod has to be rotated a lot, and it takes a lot of time to tighten, which has the disadvantage of poor work efficiency.

Therefore, the present invention solves the above-mentioned defects, and has a concrete mold that can be screwed onto the screws protruding from the weir plate of the separator with one touch, thereby making it possible to easily and quickly connect the separator to the protruding screws and tighten the weir plate. This relates to the frame tightening rod.

To explain the structure of the first embodiment of the present invention shown in FIGS. 1 to 6, a indicates a concrete formwork tightening rod, 1 is the tightening rod body of the tightening rod a, and the base end A screw 2 is installed in the head, and wedge holes 3 and 4 are bored in the middle part and the tip part, respectively. Reference numeral 5 denotes a case at the proximal end of the tightening rod a, and a projecting edge 6 having a triangular cross section that acts as a stopper is provided inwardly on one side edge of the cylinder, and one side of the inner circumferential surface is expanded from the other side. taper 7
A female thread 8 is installed on the other side to form a case 5, and within the taper 7 of the case 5, two nut segments 9 are arranged sequentially from one side, made of foamed synthetic resin such as urethane or rubber. The elastic plate 10 is housed, and the screw 2 of the tightening rod main body 1 is screwed into the female thread 8 to form the tightening rod a.

Reference numeral 11 designates a separator, which has screws 12 installed at both ends thereof, a stopper 13 at the base end of the screw 12, and a terminal 14 screwed into the screw 12 up to the stopper 13. 15 Bend a vertically long iron plate into a square shape with a washer holding the bar, and bend the top end of the vertical piece diagonally inward and upward, and the tips of the horizontal pieces downward 16 and 17, and hold the iron plate. It is reinforced with longitudinal ribs 18 and has a through hole 19 bored in the middle of the vertical piece. 20 is a wedge.

A is a weir plate that constitutes the concrete formwork, and through holes 21 are bored at appropriate locations. B is the vertical beam of the square pipe placed on the outer surface of the weir plate A, and C is the horizontal beam of the square pipe to be assembled on the outside.

Next, its effect will be explained. After erecting both sides of the weir plate A and inserting the screws 12 at both ends of the separator 11 with terminals 14 into the through holes 21, put the base end surface of the tightening rod a on the tip of the protruding screw 12 and tighten the tightening rod a. When pushed in, the nut segments 9, 9 move to the larger diameter side of the tapered surface 7 against the elasticity of the elastic plate 10 and expand, thereby expanding the inner diameter of the screw hole formed by the nut segments 9, 9. The screw thread 9 slides on the thread of the screw 12 of the separator 11 and moves straight. When reaching the weir plate A, the nut segments 9, 9 move to the smaller diameter side of the tapered surface 7 due to the elasticity of the elastic plate 10, and return to the state shown in FIG. 2, contracting and tightening the nut. The inner diameter of the screw hole formed by the segments 9, 9 is narrowed and screwed into the screw 12. Thereafter, by slightly rotating the clamping rod a and screwing it in, the weir plate A is held between the terminal 14 and the clamping rod a.

Therefore, after arranging the vertical flaps B on the outer surface of the weir plate A, the horizontal flaps C are assembled on the outside of the vertical flaps B on the tightening rod a, and then the through holes 19 of the presser washer 15 is fitted onto the tightening rod a, the downwardly bent piece 17 of the presser washer 15 is applied to the weir plate A, the vertical piece is applied to the horizontal member C, and the wedge 20 is driven into the wedge hole 4.
The weir plate A and the vertical and horizontal flaps B and C are sandwiched between the terminal 14 and the presser washer 15, and are tightened and fixed together, and the spacing between the weir plates A on both sides is maintained at a predetermined value to form a formwork.

It should be noted that the same effect can be obtained even if the number of the nut segments 9 is reduced to three.

Alternatively, a circumferential groove larger in diameter than the large-diameter end may be provided at the large-diameter end of the tapered surface 7 into which the nut segment 9 is fitted, and the elastic plate 10 may be fitted into the circumferential groove. good.

On the other hand, the same effect can be achieved even if a spring is used as the elastic body instead of the elastic plate 10 described above.

The concrete formwork clamping rod a' of the second embodiment of the present invention shown in FIG.
A recess 23 is formed in the center of the proximal end surface of the tightening rod body 1 by drilling.
It has been established.

In the tightening rod a' having this structure, the screw 12 of the separator 11 can penetrate into the recess 23 of the main body 1 through the through hole 22 of the elastic plate 10, so it can be used even when the screw 12 of the separator 11 is long. can.

To explain the structure of the third embodiment of the present invention shown in FIGS. 8 to 11, a'' is a concrete formwork clamping rod, and the wedge hole 3 of the clamping rod main body 1 in the first embodiment, 4, a screw 3' is installed at the tip of the tightening rod body 1'.

b indicates a split nut, and 24 is the case body of the split nut b, which is a hexagonal bottomed cylinder with a through hole 25 provided in the center of one side wall and a tapered inner peripheral surface that widens on the other side; After housing the two nut segments 26 and the elastic ring plate 27 in the same way as the tightening rod a in the case body 24, a cover plate 29 with a through hole 28 in the center is press-fitted into the other end of the case body 24. ,
They are fixed by welding, screwing, etc. to form the split nut b. 15'Habata material presser washer with through hole 1 in the center.
9' is drilled. B′ is the vertical beam of the round pipe, C′,
C' is a round pipe horizontally arranged in parallel with a slight gap, and is secured together by tightening at appropriate points (not shown) using connecting fittings. Other symbols indicate the same parts as in FIGS. 1 to 6.

In this structure as well, the terminal 14 of the separator 11 is operated in the same manner as in the first embodiment.
After sandwiching the weir plate A between the weir plate A'' and the tightening rod a'', the vertical beams B' are placed on the outer surface of the weir plate A, and then the horizontal beams C',
Fit the clamping rod a'' into the gap C' and assemble the horizontal members C' and C' on the outside of the vertical member B'. Next, tighten the through hole 19' of the presser washer 15'. After fitting the clamping rod a'' and applying its presser washer 15' to the horizontal members C' and C', fit the first side through hole 25 of the split nut b to the tip of the tightening rod a''. When the split nut b is pushed in, the nut segments 26, 26 and the elastic ring plate 27 are attached to the tightening rod a.
Nut segments 9, 9 and elastic plate 1 in
0, the split nut b is attached to the presser washer 15'.
At that position, the nut segments 26, 26 of the split nut b are screwed into the screw 3'.
After that, turn split nut b slightly and screw it in.
The terminal 14 and the presser washer 15' sandwich the weir plate A and the vertical and horizontal flap members B', C', and C' and tighten and fix them together, and the spacing between the weir plates A on both sides is maintained at a predetermined value to form the mold. Configure the frame.

In the present invention, the concrete formwork tightening rod is configured as described above, so that one end of the tightening rod is placed against the tip of the screw protruding from the weir plate of the separator and the tightening rod is pushed in. The attachment rod moves straight along the separator thread, and after pushing the tightening rod to the weir plate, it automatically screws into the separator thread. Therefore, the separator screw can be screwed into the specified position by simply pushing the clamping rod without rotating it, and after that, the weir plate can be tightened by the clamping rod by simply rotating the clamping rod slightly. from,
Compared to the conventional method of rotating the tightening rod from beginning to end and moving it along the threads of the separator to tighten the weir plate, there is far less rotation of the tightening rod, and tightening with the tightening rod can be performed with one touch, making it easy to handle. It is easy to use, significantly improves work efficiency, has a simple structure, can be manufactured easily and inexpensively, operates light and smoothly, and is securely and firmly fixed.

[Brief explanation of the drawing]

Figure 1 is a front view of a concrete formwork clamping rod according to the first embodiment of the present invention, Figure 2 is an enlarged front sectional view of the same base, Figure 3 is a side view, and Figure 4 is the same as in Figure 2. - Line sectional view, Figure 5 is a front sectional view of the case of the concrete formwork clamping rod, Figure 6 is a front sectional view of the concrete formwork assembled using the same concrete formwork clamping rod, FIG. 7 is a front cross-sectional view of the base of a concrete formwork clamping rod according to a second embodiment of the present invention, and FIG. 8 is a front view of a concrete formwork clamping rod according to a third embodiment of the present invention. Figure 9 is a front cross-sectional view of the concrete formwork assembled using the concrete formwork clamping rod, Figure 10 is an enlarged front cross-sectional view of the nut used in the same concrete formwork clamping rod, and Figure 11. 10 is a sectional view taken along the - line in FIG. 10. 1... Tightening rod body, 2... Screw, 5... Case, 6... Projection, 7... Taper, 8... Female thread, 9... Nut segment, 10... Elastic body,
B, C... Buta wood.

Claims (1)

[Scope of utility model registration request] A screw is installed at the base of the tightening rod body, which has a support mechanism for the flap material at the tip, and a flange that acts as a stopper is provided inward at one end of the cylinder body, and the first side of the inner circumferential surface is A proximal case is formed by forming a tapered part with the other side widening and installing a female thread on the other side, and several nut segments and an elastic body are sequentially installed in one side of the case from that one side. A concrete formwork tightening rod that is housed in a container and screwed together with the screw of the tightening rod main body on the other side.