JPS5837123B2 - How to embed interior and exterior stone plate mounting bolts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention relates to an interior/exterior stone plate mounting bolt embedding method in which an arcuate dovetail groove is dug on the back surface of an interior/exterior stone plate and a mounting bolt is firmly embedded.

(Prior art) Conventionally, in the dry method for attaching interior and exterior stone slabs to buildings, square grooves B are dug in the top, bottom, and side edges A of the stone slab, and they are secured with mounting brackets C and C' as shown in Figure 7. As shown in Fig. 8, a method of drilling a dowel hole D and attaching it to the building body F (concrete) or Y (steel frame) using a doweled mounting bracket E has been implemented.

In the case of the wet method, dowel holes are similarly made on the top, bottom, and side edges of the stone slabs to connect the stone slabs, and a separate dowel hole is made for thick brass or stainless steel wire to be inserted to connect the stone slabs to the concrete of the building. A construction method is being used in which the pieces are fastened to reinforcing bars at regular intervals, and backfill mortar is injected and hardened.

In both cases, the mounting bracket is a single unit (not fixed to the stone plate), so installation requires skill, and the strength of the stone is also weak, so the installation strength is weak, so of course there are many square grooves and dowel holes to be drilled, which takes a lot of man-hours. There was a drawback.

Also, in some cases, anchors are embedded as shown in Fig. 9A and connected to concrete, but the embedding strength is weak.

(Structure of the Invention) The present invention is an embedding method invented in conjunction with the development of a dovetail cutting machine for embedding interior and exterior stone plate mounting bolts in order to improve the above-mentioned drawbacks, so the structure of the dovetail cutting machine can be easily modified. The method of embedding the interior and exterior stone plate mounting bolts of the present invention will now be described.

As shown in Figs. 1 to 3, the dovetail cutting machine includes a cutting head 1 having a cutter 2, a feed device that rotatably supports the cutting head 1 on a spindle 3 and rotates it manually or automatically. 4. A carriage 5 equipped with an abutment device 12 for determining depth and a fixing device 18, a moving device consisting of a cross beam 18 that can move the carriage 5 back and forth and left and right on the stone plate 6, a running rail 19, and a fixing device 13'. 14 and stone plate 6 petsudo 7
, a machine stand 8 equipped with a lifting device 15 for the stone plate 6, and the like.

The cutting head 1 is rotated and rotated about the support shaft 3 by hand or by the feeding device 4, and as shown in FIG. ), cut an arcuate dovetail groove 9 inside until the cutter 2 is perpendicular to the stone plate 6, insert a mounting bolt 10 (countersunk head bolt is used in the embodiment) into the dovetail groove 9,
This method is characterized by filling and fixing with a filler 11.

The cutter 2 is a dovetail cross-sectional cutter having a shape similar to the countersunk head bolt of the mounting bolt 10, without threads, grooves, or holes, and having diamond particles electrodeposited on a core metal with a knob allowance.

In this example, since an M12 countersunk head bolt is used as the mounting bolt 10, the cutter core metal is electrodeposited with diamond, and its shaft diameter is approximately 18 ml.

Note that the cutter may have a T-shaped cross section and a hexagonal or square-headed bolt may be embedded therein.

As the filler 11, epoxy resin, litharge, glycerin cement, etc., which have strong adhesion and have little shrinkage upon hardening, are used.

(Function of the Invention) The present invention uses a dovetail cutting machine as shown in FIGS.
The stone plate 6 is placed on the bed 7 and moved to a predetermined position, and the vertical device 15 is lowered to place the stone plate 6 on the bed 7.

Next, the carriage 5 is moved to the running rail 19 and the cross beam 1.
It is moved back and forth and left and right on the stone plate 8, and is stopped at the dovetail excavation position of the stone plate 6 and fixed by the fixing devices 13 and 13'.

Thereafter, the stone plate presser 16 of the abutting device 12 is adjusted to determine the depth, and the abutting device 12 is operated to bring the stone plate presser 16 into contact with the stone plate 6.

Next, as shown in FIGS. 4 to 6, the cutter 2 of the cutting head 1, which rotates at high speed, is rotated around the spindle 3 by the feeder 4 to cut inward from the surface of the stone plate 6 in an arc shape. A dovetail groove 9 having a cross-sectional shape similar to No. 2 is formed.

After stopping the cutter 2 at a position perpendicular to the stone plate 6, returning it and pulling it out, and drilling the other required number of dovetail grooves, the abutting device 12 and the fixing devices 13, 13' are activated to free the carriage 5, The master lifting device 15 is operated to raise the stone plate 6 and move it on the rollers 17 to remove it.

Clean and dry all dovetail grooves 9 and filler 11 (
In the embodiment, epoxy resin (epoxy resin) is injected, a mounting bolt 10 is inserted, and it is well blended with the filler 11, filling up to the surface, and waiting for hardening to complete the embedding.

(FIG. 6) Since the dovetail groove 9 is a single hole, the filler does not flow out and can be completely filled.

Since arc cutting in the present invention is always cutting in the lateral direction, the cutting quality is good, and the removal of chips is also good, and the cutting time is extremely short.

In the example, one dovetail groove 9 could be cut in less than 30 seconds.

(Effects of the Invention) Since the method of the present invention has the structure and function of the dovetail cutting machine described above, the cutting time is extremely short and the effect on efficiency improvement is extremely large.

In addition, since the dovetail groove is small and independent, it has little effect on the strength of the stone plate, and the filler is easy to fill and does not flow out, so the fixing strength of the mounting bolt is strong and the finish is beautiful.

[Brief explanation of drawings]

Fig. 1 is a front view of an example of a dovetail cutting machine for embedding interior and exterior stone plate mounting bolts used in the present invention, Fig. 2 is an enlarged front view of the carriage shown in Fig. 1, and Fig. 3 is a side box view. , Fig. 4 is a diagram of the relationship between the cutter of the cutting head and the stone plate, Fig. 5 is a perspective view of the dovetail groove in the present invention, and Fig. 6 is a mounting bolt embedded by the method of the present invention and a frame formed by the mounting bolt. Figure 7 is a cross-sectional view of the state in which it is attached to the body, and Figure 7 is a perspective view of the conventional example.
Figure A and Figure 9 are cross-sectional views of other conventional examples. Explanation of symbols of main parts, 1...Cutting head, 2
・・・・・・Cutter, 3... Interlocking shaft, 5... Interval carriage, 6... Stone plate, 9... Dovetail groove, 1
o...Mounting bolt, 11...Filler.

Claims (1)

[Claims] 1 Rotate the cutting head of the dovetail groove cutting machine for embedding interior and exterior stone plate mounting bolts by hand or by a feeding device using the spindle as a fulcrum, and use the cutter of the cutting head to cut a dovetail groove in an arc from the back side of the stone plate to the inside. A method for embedding mounting bolts in an interior/exterior stone plate, comprising cutting the stone plate until the cutter is perpendicular to the stone plate, inserting the mounting bolt into the dovetail groove, and filling and fixing the bolt with a filler.