JPS628287Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a dummy bolt attachment fitting for a dam form.

When constructing an erosion control dam etc. 1 as shown in Figure 1,
A dam form 3 formed by combining and bonding a plurality of metal forms 2 is supported and fixed to a thick piece 4 by hook bolts (not shown), and is placed on a bracket 3' fixed to the inner surface of the middle part of the thick piece 4. . The end piece 4 passes through the plate 5 fixed to the outer surface at the middle part and the bracket 3' to connect the Siebold 6 to the anchor 7 buried in the concrete, and further has a plate 8 fixed to the outer surface at the upper part. Then, the dummy bolt 9 is passed through the metal form 2 on the upper part of the dam form 3 and connected to the anchor 10 arranged to be buried in the part where concrete is to be poured, and the washer 11a is attached to the sea bolt 6 and the dummy bolt 9. After fitting, the dam form 3 is supported on the concrete wall by tightening the nut 11. Then, a jack bolt 14 that passes through a plate 12 fixed to the outer surface of the end piece 4 at its lower part and is tightened and fixed with a nut 13 is brought into contact with the concrete wall surface, and the end piece 4 is held parallel to the concrete wall surface. The dam form 3 is supported to prevent outward deformation (warping due to load) of the dam form 3 during concrete pouring.

By the way, the holes 15 in the plate 8 that pass through the dummy bolts 9 on the upper part of the thick material 4 are drilled at fixed positions, so if the inclination angle θ of the erosion control dam, etc. 1 to be constructed changes, the dummy bolts 9 Anchor 1 at the tip
The height of the connection to 0 changes. However, since the anchor 10 has a fixed height at which concrete is cast once, the height position at which it is buried is also fixed. Therefore, if the inclination angle θ of the erosion control dam, etc. 1 to be constructed changes, the dummy bolts 9 cannot be connected to the anchors 10, and the dam form 3 cannot be set.

For this reason, in the past, a large number of metal forms 2 were prepared in which the positions of the holes passing through the dummy bolts 9 were changed, and the plate 8 passing through the dummy bolts 9 was not fixed to the end piece 4, as shown in FIG. Instead of the plate 8' in which bolt insertion holes 16 are drilled at the upper and lower sides on both the left and right sides as shown in FIG. As shown in a and b, plate 8 is replaced with plate 8'
In place of this, there is also a slotted hole 18 perpendicular to the top of the end piece 4.
The plate 8' is attached to the end piece 4 with bolts 19 and nuts 20 so that the level can be adjusted. And the inclination angle θ of the sabo dam etc. 1 to be constructed
Each time the metal form 2 was changed, the position of the hole passing through the dummy bolt 9 was changed, and the metal form 2 was replaced and the mounting level of the plate 8' was adjusted.

However, in the mounting method of the plate 8' as shown in FIGS. 2a and 2b, the bolts 19 and nuts 20 are removed and the plate 8' is moved to the required level position every time the inclination angle θ of the erosion control dam, etc. 1 changes. , bolt 1
9. Since it must be installed using the nut 20, it is time consuming and extremely troublesome. Furthermore, drilling a vertical elongated hole 18 in the upper part of the thick piece 4 as shown in FIGS. 3a and 3b not only reduces the strength of that part but also increases processing costs. Furthermore, both of the above-mentioned mounting methods for the plates 8'
Since the amount of movement of the plate 8' is regulated by the number of bolt insertion holes 17 and the length of the elongated hole 18,
If the inclination angle θ of the erosion control dam or the like 1 changes drastically, the dummy bolt 9 cannot be attached. For this purpose, a large number of bolt insertion holes 17 are formed in the thick end material 4 or the length of the elongated hole 18 is further increased, but this increases the processing cost.

The present invention was developed in view of the above circumstances, and allows dummy bolts to pass through the sabo dam, etc., no matter how the inclination angle changes, without drilling bolt insertion holes or elongated holes in the thick material. To provide a dummy bolt mounting bracket which allows the dummy bolt to be mounted and fixed at any level position by appropriately replacing the metal form with the hole position changed.

The dummy bolt mounting bracket of the present invention has a hole through which a dummy bolt passes through the center of a sliding plate that is slidably fitted from the upper end of a thick piece of material supporting and fixing a dam form. There is a washer with a hole around the hole that locks the dummy bolt with a hook pin when it passes through the hole, and bolt insertion holes are drilled at the top and bottom of both left and right sides, and nuts are welded to the front of each hole. This is made by screwing together a bolt that comes into contact with and presses against a thick piece of material through a bolt insertion hole.

Examples thereof will be described below based on the drawings. As shown in FIGS. 4a and 4b, the thick end material 4 for supporting and fixing the dam form 3 is made by connecting channel steels 4a with lips back to back to the left and right and connecting them with plates (not shown). The dummy bolt mounting bracket 21 of the present invention, which is fitted from the upper end of the thick piece 4, is attached to the left and right channel steels with lips 4a, which are the front plates of the thick piece 4.
A sliding plate 24 is formed by providing a clamping part 23 holding a lip connected to the outer side of the lipped channel steel 4a at both ends of the plate 22, which is arranged on the outer side of the plate 22. 15, L-shaped washers 25 are fixed facing each other in the upper and lower positions of the holes 15, and holes 26 for penetrating the hook pins are bored in positions opposite the rising parts of both washers 25. Bolt insertion holes 27 are drilled in the upper and lower sides of the left and right sides of the bolt, nuts 28 are welded to the front surface of each of the bolt insertion holes 27, and the bolt insertion holes 27 are passed through each of the nuts 28. It is formed by screwing together a bolt 29 that presses against the outer side of the channel steel 4a.

The dummy bolt mounting bracket 21 of the present invention constructed as described above is constructed so that when constructing the erosion control dam etc. 1 shown in FIG. 4a and the lip connected thereto, the sliding plate 24 is fitted as shown in FIGS.
Slide down to the hole position. After passing the dummy bolt 9 through the hole 15 at the center of the sliding plate 24 and further through the hole in the metal form 2, insert the nuts 2 at the top and bottom of the left and right sides of the sliding plate 24.
8, the bolt 29 is tightened, and its tip is pressed against the front surface of the end piece 4, and the bolt 29 is fixed by the friction. As shown in FIG. 1, the dummy bolt 9 is screwed to an anchor 10 placed to be buried in the area where concrete is to be poured, and passed through the hole 26 of the washer 25 into the lateral hole of the dummy bolt 9. A hook pin 30 is passed through 9a to fix the dummy bolt 9 and prevent it from coming off.

If the inclination angle θ of the erosion control dam, etc. 1 that is being constructed changes, replace it with a metal form 2 in which the position of the hole through which the dummy bolt 9 passes is changed, and also adjust the level position of the dummy bolt mounting bracket 21 of the present invention. . That is, loosen the bolts 29 on the upper and lower sides of the left and right sides of the sliding plate 24, slide the sliding plate 24 to the required level position as shown by the two-dot chain line, insert the dummy bolts 9 into the holes 15, and then insert the dummy bolts 9 into the holes 15. After passing through the bolt 29, tighten the bolt 4
Press it against the front of the device and fix it by the friction.
After the dummy bolt 9 is screwed to the buried anchor 10 as described above, it is fixed to the washer 25 with the hook pin 30 to prevent it from coming off.

In addition, the thick material 4 that supports and fixes the dam form 3
However, when channel steels 4b are connected back to back on the left and right as shown in FIG. Folded clamping part 2
It is good to provide 3'.

As can be seen from the above explanation, if the dummy bolt mounting bracket of the present invention is used, there is no need to drill bolt insertion holes or elongated holes in the thick material, so the processing cost required for this can be reduced, and the structurally Since this does not occur, a decrease in strength can be prevented. In addition, the dummy bolt mounting bracket of the present invention does not change the amount of vertical movement depending on the number of bolt insertion holes and the dimensions of the elongated hole, unlike conventional methods, even if the inclination angle of the erosion control dam changes during construction. Since there are no restrictions, the dummy bolt can be installed at any level, which has the effect of expanding the range of applications of the dam form.

[Brief explanation of the drawing]

Figure 1 is a side view showing the set state of a conventional dam form, Figures 2 a and b and Figures 3 a and b are front views and cross-sectional views of a conventional dummy bolt mounting bracket, respectively, and Figures 4 a and b. 5 is a front view and a cross-sectional view of one embodiment of the dummy bolt fitting according to the present invention, and FIG. 5 is a cross-sectional view of another embodiment of the dummy bolt fitting according to the present invention. 2...Metal form, 4...Thick wood, 4a...
...channel steel with lip, 4b...channel steel, 9...dummy bolt, 15...hole through which the dummy bolt passes,
21... Dummy bolt mounting bracket, 22... Plate, 23, 23'... Holding part, 24... Sliding plate, 25... L-shaped washer, 26... Hole for hook pin to pass through, 27... Bolt Insertion hole, 28...
Natsuto, 29...Boruto.

Claims (1)

[Scope of utility model registration request] The channel steels with lips are arranged back-to-back on the left and right and are connected by plates, and the clamping parts holding the lips connected to the outer sides of the channel steels on the left and right sides of the thick material supporting and fixing the dam form are provided on both sides. A hole is made in the center of the sliding plate with which the dummy bolt passes, and L-shaped washers are fixed facing each other in the upper and lower positions of the hole, and a hole is drilled through the hook pin in the opposite position of the rising part of both washers. Then, bolt insertion holes are drilled in the upper and lower sides of the left and right sides of the sliding plate, nuts are welded to the front side of the holes, and bolts that contact and press the thick material are screwed into each nut through the bolt insertion holes. Dummy bolt mounting bracket for dam form.