JPH046522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting device for semi-cured foamed concrete, and its purpose is to:
It is an object of the present invention to provide a cutting device for cutting a semi-cured material with high accuracy and a clean appearance to obtain various ALC panels with high commercial value. The purpose of the present invention is to provide a cutting device capable of cutting a panel of large-sized foamed concrete, such as ALC (foamed concrete treated with high temperature and high pressure steam).In addition, as shown in FIG. A cutting device that can cut between block rows of a workpiece 1 with high precision (product length, accuracy) by cutting up the cutting wire 12 from the bottom via the guide roller 7, even if it is as long as about 1.5 m. The goal is to provide the following.

Conventional cutting equipment using steel wire, which is the cutting wire for semi-hardened foamed concrete, has a
It was used at a relatively low tension level of 10-30%. This is because the requirements for cutting accuracy, that is, product dimensions such as product length, thickness, and width, were not so strong (this was also due to the fact that the dimensions were maintained through mechanical finishing such as cutting in subsequent steps). or,
Most commonly, the cutting width of the object to be cut is relatively short.
These were able to be cut off.

Recently, there has been a renewed demand for improved product dimensional accuracy for various ALC panels due to improved adhesion accuracy during construction and improved appearance.Also, in order to save labor in the process, it has become necessary to improve cutting accuracy by block cutting without mechanical finishing after autoclaving. requested.

The inventors of the present invention conducted intensive research to obtain a foamed concrete panel with good cutting accuracy and good appearance, and as a result, they discovered a cutting device that can obtain the desired panel.

Note that cutting accuracy and appearance properties can be evaluated even with normal-sized panels, but with wide panels, poor precision of the cut surface becomes noticeable. For example, when viewed from the side, undulations and unevenness can be easily identified. This makes it easier to evaluate the cutting situation. Furthermore, in the case of panels with conventional panel widths, the width of the part to be cut is
It is approximately 600 to 700 mm, and the support interval between the cutting lines is short, so it can be cut with low tension. However, in the case of wide panels (for example, panels with a width of more than 900 mm at the part to be cut), it is necessary to support the cutting line. The spacing becomes longer and cutting becomes difficult. Therefore, although the evaluation of the present invention was mainly performed using large panels, even a normal panel width can produce a product with good cutting accuracy and a beautiful appearance, just like a large wide panel.

The present invention provides a foamed concrete semi-plastic body 1 to be cut.
two movable frame moving guides 2 and 3 that are parallel to each other at an interval that allows the movable frame to be placed thereon, a movable frame 4 that can move on the movable guides 2 and 3, and one side of the movable frame 4 on the movable guide 2 side. and the other moving guide 3 of the movable frame 4.
A guide roller 6 fixed to the side, a plurality of cutting line positioning guide rollers 7, 7' fixed to the movable pedestal 4, and a plurality of cutting line positioning guide rollers 7, 7' fixed to the movable pedestal 4 are separated from the movable pedestal 4 in a substantially parallel direction along the one movable guide 2. one guide roller 8 which is arranged and fixed at a fixed position;
A weight 9 located on the side of the guide roller 8 and fixed at a position apart from the movable frame 4;
substantially parallel to the movable frame 4 along the other movable guide 3 on the opposite side to the side where the one guide roller 8, which is arranged and fixed at a position apart from the movable frame 4, exists. the other guide roller 10 which is arranged and fixed at a position away from the movable pedestal 4 in the opposite direction, and a cut wire gripping part 11 which is present on the side of this guide roller 10;
A guide roller 6 whose one end is held by the cut wire holding part 11 and fixed to the other moving guide 3 side of the movable pedestal 4, and the other guide roller 6 which is fixed at a position away from the movable pedestal 4. A plurality of cutting line positioning guides fixed to the movable frame 4 pass through a guide roller 6 stretched between the guide roller 10 and finally fixed to the other movable guide 3 side of the movable frame 4. Roller 7, 7'
a guide roller 5 fixed to one of the movable guides 2 side of the movable frame 4;
The movable pedestal 4 is stretched along one of the movable guides 2 through one guide roller 8 which is arranged and fixed at a position apart from the movable pedestal 4, so that one of the movable guides 2 side of the movable pedestal 4 is stretched. The movable guide 2 of one of the movable bases 4 is stretched between the guide roller 5 fixed to the movable base 4 and one guide roller 8 fixed to the movable base 4 and arranged at a distance from the movable base 4. The cut wire 12 passes through a guide roller 5 fixed to the side and the other end reaches the weight 9, and the cut wire 12 has a breaking load of 35 to 35 of the breaking load of the cut wire itself. This is a cutting device for semi-plastic foamed concrete, which is characterized by being stretched at a high tension of 95%.

It is unique in that it is stretched under high tension at the cutting line.

The wire to be cut may be anything that has a circular or nearly circular cross section, such as steel wire, other metal wires, or synthetic fiber threads, and has high tensile strength, but the following wires may be used: is most preferred. It can withstand high tension like class B piano wire,
A steel wire with a diameter of about 0.5 to 1.2 mm is preferable because it is easy to handle, the cutting resistance is not so large, and the cut surface quality is good. The breaking strength of the cut wire in the present invention is
For example, for steel wire, the tensile breaking strength is shown according to the JIS tensile test method for metal materials (JIS Z2241).

The stress-strain curve of 0.8 mm thick piano wire of type B is as shown in FIG. 2, and according to the present invention,
It is used in the plastic region beyond the elastic region up to A in the figure. In the cutting device according to the present invention, the static load normally applied during block cutting does not cause the ready-to-cut wire to break, but breaks when the elongation exceeds a certain value. Therefore, if the elongation of the cut wire itself at break is known in advance, the cut wire can be replaced before it breaks.

Further, high tension applied to a cut wire can be achieved by increasing the load applied to a single cut wire to a level close to the breaking strength of the cut wire using a spring, weight, air pressure, hydraulic pressure, or the like.

In the present invention, high tension is applied to increase cutting accuracy, but this causes the cut wire to be loaded beyond its elastic limit, and the cut wire may stretch little by little as the number of cuts increases. come.

Therefore, a device is needed to absorb this elongation and keep the tension constant for each cut, but in addition to using a weight as in the example above, there are also devices that use hydraulic pressure and devices that use pneumatic pressure. There are some with a structure that allows the spring and cutting line grip to be expanded and contracted.

Here, the apparatus of the present invention will be explained using FIG. The device includes two moving guides 2 and 3 for a movable frame parallel to each other, a movable frame 4, a plurality of guide rollers 5 and 6 fixed to the movable frame 4, and a position apart from the guide rollers 5 and 6. A plurality of guide rollers 8, 10 fixed to the cut wire rod 12,
A grip part 11 at one end of the cut wire and the cut wire 12
It has a weight 9 that tensions the weight.

The distance between the moving guides for the moving frame (hereinafter referred to as moving guides) 2 and 3 is large enough to allow the foamed concrete semi-plastic body 1 of the material to be cut to be placed therebetween. The movable frame 4 is then moved along these moving guides 2 and 3. Further, the guide rollers 5 and 6 are fixed to the movable frame 4 on the side of the respective movable guides 2 and 3. Furthermore, at least two cutting line positioning guide rollers 7, 7' are fixed to the movable frame 4.

Further, guide rollers 8 and 10 fixed at positions apart from the movable frame 4 are located in substantially parallel directions along the respective movable guides 2 and 3. This approximately parallel direction includes the extension line of the moving guides 2 and 3, and as shown in FIG. 1, the device of the present invention is generally placed at a position beyond the moving guides 2 and 3. It is. and guide rollers 8 and 1
0 is provided in the opposite direction across the movable frame 4. Also, a weight 9 is placed on the side of the guide roller 8.
However, on the guide roller 10 side, there is a cut wire holding part 11.

The cut wire 12 is held at one end by the gripping part 11, is stretched over the guide roller 6, the guide roller 10, and the guide roller 6, passes through the cutting positioning guide rollers 7 and 7', and is stretched over the guide roller 5. The other end of the cut wire 12 is stretched between the guide rollers 8 and 5 and reaches a weight 9. In this way, the cut wire 12 is stretched by the grip 11 and the weight 9 at a high tension of 35 to 95% of the breaking load of the cut wire.

The weight 9 is used to apply tension to the cut wire 12, and as shown in FIG. This gripping device 20
It is preferable to use a structure in which the weight 9 can constantly apply the load by applying the load. The gripping part 11 and the gripping device 20 may have the same gripping method selected from the gripping methods described below. In order to prevent the wire from hanging too much, cut the wire 1.
In order to adjust the length of 2, it is assumed that the winding winch mechanism is provided as shown in Fig. 1.
It is preferable to allow rewinding.

In addition, the guide roller 10 and the guide roller 6
The number of reciprocating windings of the cut wire 12 between the guide roller 5 and the guide roller 8 is preferably the same as the number of reciprocating windings of the cut wire 12 between the guide roller 5 and the guide roller 8 from the viewpoint of device balance. The number of round trips during this period is the first
In the figure, there are two round trips each, but the number of round trips n is 2.
It is more preferable to set it as above. In the apparatus of the present invention configured as described above, when the movable frame 4 is moved at a speed v, the cut wire 12 will travel at (2n+1)×v. The present invention is characterized in that it is an apparatus capable of cutting a semi-cured foamed concrete body while the cutting wire 12 stretched under high tension runs at high speed.

Furthermore, in FIG. 1, a large number of rollers are used for each of the guide roller 5, guide roller 6, guide roller 8, and guide roller 10, but it is also possible to use rollers that perform the same role by stacking them vertically. Of course, it is also possible to use a large number of rollers on the same axis, or furthermore, a single roller with grooves for guiding the cut wires 12.

Note that any method may be used to grip the end of the cut wire, but the end gripping method of the cut wire 12, which is often used in a conventional cutting device using a cutting wire under low tension, as shown in FIG. The method is to fix the cut wire by crimping a metal hollow cylinder 14 around the cut wire 12 with a press 18, but when used under high tension, the cut wire may break at other parts. Although it rarely occurs, the cut wire breaks at the gripping portion of the cut wire, so it is better to avoid this gripping method when industrially implementing the present invention.

In accordance with the present invention, a method for holding the end of the cut wire is shown in FIG. 4 in order to implement the invention industrially, to further reduce the breakage of the cut wire at the cut wire gripping part 11, and to increase the durability of the cutting device. It is preferable to adopt a method of winding and fixing a cut wire such as this (referred to as a wrapping fixing method in the present invention) or a fixing method using an adhesive, which will be described later. Adoption is preferred. The 4th method of wrapping and fixing is
The methods shown in Figures a and b are the main methods, and the cutting wire 12
There is no difference in terms of wrapping. Figure 4a
The cutting line is fixed by making a hole in the cylinder of the gripping part, and this hole may be placed anywhere on the gripping part 11 shown in FIG. 4a, or it may be a groove. Also, the fourth part at the end of the cut wire
12 in Figure a may be intertwined with other cutting lines. FIG. 4b shows the cut wire 12 being held in the cylindrical part 13 of the gripping part 11.
By wrapping the cut wire 12 tightly, it is intended to be fixed by the frictional force, and the cut wire 12 is entangled with the cut wire 12 at the end of the cut wire, as shown in FIG. 4b, and fixed. If necessary, the fourth
Apply packing tape or some other ring-shaped material to the part shown in Figure b to prevent it from unraveling when cutting the wire.

In the winding method, the larger the diameter of the winding portion, the more preferable it is because the bending stress of the cut wire is reduced.

In addition to the method of winding the cut wire, as shown in Fig. 5, instead of crimping the conventional metal cylinder 14 around the cut wire, a strong adhesive 15 such as epoxy or cyanoacrylate is filled with a strong adhesive 15 (shown in Fig. 5). death,
There is a method of adhering the hollow cylinder 14 and the cut wire 12, and by this method as well, it is possible to obtain a cutting wire gripping section for high tension. In this case, it is necessary to round the ends (corners) 16 of the hollow cylinder 14 to prevent the cut wire 12 from being damaged by the corners of the hollow cylinder 14. The metal hollow cylinder 14 has a structure that can be hooked and fixed by a disk 17.

As described above, if the structure is such that the gripping portion does not receive much deformation strain, the durability of the cut wire will be significantly increased, and tension will be applied close to the breaking strength of the cut wire.

In the present invention, mortar hardness refers to cylinder diameter
Penetration resistance of 20 mm and 35 mm length is shown in pounds using a (Yamanaka type) soil hardness meter.

Example: The size of the lightweight aerated concrete semi-plastic body is 4 m.
A piece of length x 1.8m width x 0.18m height was cut as follows.

To explain based on Fig. 1, in this method, the cutting part with the cutting wire moves horizontally in the direction of the arrow with respect to the semi-plastic material, and the lightweight aerated concrete semi-plastic material on the formwork plate is 1 is for cutting in a fixed state, and FIG. 1 shows a cutting plan view seen from above. The cut wire 12 is 1.0φ piano wire B type, and the breaking load is 180Kg/1 wire, and the tension is 180×0.60=108Kg.
I put it on. The tension is applied as follows: first, the cut wire 12 is wound around 20 and fixed, then it passes through the guide rollers 8 and 5, passes through the cut wire positioning guide rollers 7 and 7', and then,
It passes through guide rollers 6 and 10 and is wrapped around the grip portion 11 and fixed. The length of the cut wire is adjusted when the cut wire is attached, and the weight 9 gradually lowers with each cut, and the cut wire stretches. Wrap it with something, unwind it, and adjust it. Lightweight cellular concrete semi-plastic 1
The mortar hardness was 15 pounds, and the moving speed of the movable frame 4 was 5 m/min. In addition, when the moving speed of the movable frame 4 is 5 m/min, the cut wire 1
The running speed of the cut wire itself between the two guide rollers 7 and 7' was 5×5=25 m/min.
Also, the height of the cut wire is 125mm from the bottom of the block.
It was in the position of

The flatness of the cut surface 22 of the obtained object to be cut was measured using a 2m stretch 23 as shown in FIG. 6, and the flatness was extremely excellent as shown below. Gently stretch the cut surface for 2m immediately after cutting.
When they were brought into contact and the gap between the recesses 24 was checked using a scale, it was found to be 1.0 mm or less in both the length and width directions. After curing in the autoclave, cut the cut surface using the same 2m stretcher 23 with a feeler gauge from the center and center in both the length and width directions.
Measurements were made at a pitch of 800 mm, and all values were within 1.5 mm, including warpage due to auto-curing of the plate.
Also, there were no traces of waves from the cut wire. Regarding the durability of the cut wire, it did not break even after being cut 300 times.

When the previously described technology was used to cut blocks with a narrow product width of about 600 mm by narrowing the support span of the cutting line holder, the cutting accuracy was greatly improved compared to the conventional cutting method. Similar results were also obtained when cutting when the mortar hardness was 4 pounds.

It is also effective when cutting between rows of lightweight aerated concrete semi-plastic as shown in Figure 7, and the cutting accuracy has been greatly improved by applying the present invention to ±5.
~±3mm became accurate to ±3~±1mm.

As described above, according to the present invention, lightweight cellular concrete slabs with a product width of 2400 mm or less can be cut with high flatness accuracy.
Moreover, the durability of the cut wire rod is significantly improved, and productivity is improved. Among them, large-scale integrally molded lightweight cellular concrete slabs, which are in great demand in the market due to their design, workability, earthquake resistance, etc., can be supplied using a method with high production efficiency. Furthermore, a plate with a good appearance without cutting lines such as tree rings can be obtained on the plate surface, and in particular, by using the cutting wire direction, a smooth plate with a smooth feel can be obtained.

[Brief explanation of drawings]

Fig. 1 is a plan view of the apparatus of the present invention, Fig. 2 is a diagram showing the relationship between tensile stress and elongation of type B piano wire, Fig. 3 is a perspective view and side view showing an example of conventional gripping of a cut wire, and Fig. 4 Figures a and b are perspective views showing an example of gripping the end of a cut wire used in the device of the present invention, Figure 5 is a sectional view of the end of the cut wire being gripped with adhesive, etc., and Figure 6 is the cutting accuracy (flatness) of the product. A measurement perspective view, and FIG. 7 is a cross-sectional perspective view between block rows. 1...Lightweight aerated concrete semi-plastic body, 2,3
...Movement guide, 4...Movement stand, 5, 6, 8,
10... Guide roller, 7, 7'... Cut wire positioning guide roller, 9... Weight, 11...
Cut wire rod gripping section, 12...Cut wire rod, 13...Cylindrical portion of the cut wire rod gripping section 11.

Claims (1)

[Claims] 1. Two moving guides for movable frames that are parallel to each other at an interval that allows the foamed concrete semi-plastic body of the object to be placed to be placed, a movable frame that can move on the movable guides, and one of the movable guides of the movable frame. a guide roller fixed to one side of the movable frame, a guide roller fixed to the other movable guide side of the movable frame, a plurality of cutting line positioning guide rollers fixed to the movable frame, and a guide roller fixed to the other movable guide side of the movable frame; one guide roller arranged and fixed at a position away from the movable pedestal in a substantially parallel direction, and a weight present on the side of this guide roller arranged and fixed at a position away from the movable pedestal; In a direction substantially parallel to the other moving guide, in front of the side opposite to the side where the one guide roller, which is arranged and fixed at a position apart from the movable frame, is present, and in a direction opposite to the movable frame. The other guide roller is arranged and fixed at a position apart from the movable pedestal, a cut wire gripping part is present on the side of this guide roller, and one end of the movable pedestal is gripped by the cut wire gripping part. A tension is placed between the other guide roller fixed to the moving guide side and the other guide roller arranged and fixed at a position apart from the movable pedestal, and finally the other movable pedestal is moved. passing through a guide roller fixed to the guide side and stretched along a plurality of cutting line positioning guide rollers fixed to the movable frame;
Passing through a guide roller fixed to one of the movable guides of the movable frame, the movable frame is stretched along one movable guide and fixed to one guide roller disposed at a position apart from the movable frame. The movable frame is stretched between a guide roller fixed to one of the movable guide sides of the movable frame and one guide roller fixed at a position apart from the movable frame, and finally the movable frame is The cut wire passes through a guide roller fixed to one of the moving guide sides of the mount and the other end reaches the weight, and the cut wire has a breakage that the cut wire itself has. A cutting device for semi-plastic foamed concrete that is tensioned with a high tension of 35 to 95% of the load.