JPH0673832B2 - Method for cutting semi-plastic cake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a method for cutting a semi-plastic cake, and particularly a cake (such as lightweight aerated concrete (hereinafter referred to as "ALC")) while reciprocally vibrating a piano wire. It relates to a cutting method for cutting a semi-plastic material before curing.

b. Conventional Technology ALC panels are now widely used as building materials. This ALC panel is manufactured by first pouring a few cubic meters of concrete material into the formwork, then inserting a piano wire into this concrete material and cutting it to the desired size when the concrete material reaches a specified hardness. Then, after that, it is cured in an autoclave to finish the ALC panel.

Several types of cutting methods have been proposed as the cutting method using the piano wire. The simplest method among them is a cutting method in which a concrete material is moved at a right angle with respect to a piano wire that is strongly stretched at a fixed position, or on the contrary, a concrete material is placed and the piano wire is moved.
However, these methods require a great amount of force for cutting because the so-called horizontal angle of the blade increases, and the sharpness is poor,
As a result, the cut surface is in a so-called rough shape. And when the cut surface is rough like this, during finishing the surface of the panel after curing, adhesion of the finishing agent is extremely difficult due to ALC powder blowing, and the yield of the finishing agent is increased due to the unevenness of the surface. become worse.

Therefore, as shown in FIG. 5, connect the piano wire 21 to a pair of rollers.
A cutting method has been proposed in which the cake 23 is passed over the roller 22 and the roller 22 is cyclically driven in both the forward and reverse directions to move the cake 23 in a direction perpendicular to the piano wire 21 (Japanese Patent Application No. 46-68206 (Japanese Patent Application No. (Kaisho 48-34927))). According to this cutting method, the cut surface becomes considerably smooth. However, at the moment when the roller 22 reverses, the speed of the piano wire 21 becomes 0, so at this time the cake
The so-called cedar pattern 24 is attached to 23. Such a cedar pattern is unnecessary unless it is particularly desired as a building material, and it is desirable that it is a non-pattern from the viewpoint of preventing ALC powder blowing and improving the yield of the finishing agent applied to the panel surface.

Therefore, as shown in FIG. 6 and FIG. 7, at the moment when the velocity Vp of the piano wire 21 becomes 0, the piano wire 21 for the cake 23
A cutting method is proposed in which the velocity V _B in the lateral direction of the wire (the direction perpendicular to the piano wire 21) is controlled to be 0 (Japanese Patent Laid-Open No. 59-103).
No. 711). The device used in this cutting method is, specifically, as shown in FIG. 6, a moving table 26 to which a pair of rollers 25 are attached, and a driving device (not shown) for driving the moving table 26 in a direction perpendicular to the piano wire 21. No.)). The piano wire 21 is wound around the pair of rollers 25, and the piano wire 21 is reciprocally oscillated in the longitudinal direction by the periodic reversal drive of the rollers 25. Then, at the moment when the roller 25 reverses, that is, at the moment when the velocity Vp of the reciprocating vibration motion of the piano wire 21 becomes 0, the driving device of the moving table 26 is controlled so that the moving speed V _B of the moving table 26 becomes 0. It has become.

c. Problems to be Solved by the Invention The cutting method in which the cedar pattern is not formed on the cake is as described above, but this cutting method has the following problems. That is, if the reciprocating vibration cycle of the piano wire 21 and the speed fluctuation cycle of the moving table 26 can be perfectly matched, the cedar pattern is considered to be completely eliminated, but the frequency of the piano wire 21 is actually Since it is extremely high at 100 times / minute or more, it is extremely difficult to precisely drive and control the moving table 26 in synchronization with the piano wire 21. Therefore, some cedar patterns are unavoidably generated.

The present invention has been devised to effectively solve the above-mentioned problems, and an object thereof is to provide a method for cutting a semi-plastic cake capable of obtaining a smooth cut surface without any cedar pattern. To do.

d. Means for Solving the Problems In order to solve the above-mentioned problems, the present invention presses a tensioned piano wire against a semi-plastic cake, and reciprocally oscillates the piano wire in its longitudinal direction while reciprocating the same. In the cutting method of moving the cake or the piano wire in a direction perpendicular to the vibration direction to cut the cake, the piano wire has an amplitude of at least 1 m or more, and reciprocally vibrates at a speed of 0.3 to 30 m / min. , The cake or piano wire 0.5 to 20m / in the direction perpendicular to this reciprocating vibration direction
The moving speed of the cake or the piano wire is controlled to be 0 when the speed of the reciprocating vibration motion of the piano wire becomes 0 at a speed of minutes.

e. Action In the cutting method configured as above, 1 m of piano wire
Since the reciprocating vibration motion is performed with the above amplitude and at a speed of 0.3 to 30 m / min, the piano wire moves in the longitudinal direction by 2 m or more in one reciprocating reciprocating motion, and the frequency of the piano wire is 30/2. =
Reduced within 15 times / min. In this way, by setting the frequency of the piano wire within 15 times / minute, when the vibration speed is 0, the relative movement speed between the cake and the piano wire in the direction perpendicular to the vibration direction of the piano wire is 0. And easy and accurate. Therefore, the reciprocating vibration cycle of the piano wire and the speed fluctuation cycle of the piano wire in the perpendicular direction can be perfectly matched, and at the moment when the reciprocating vibration speed of the piano wire becomes 0, it is perpendicular to the longitudinal direction of the piano wire. The relative moving speed in the direction can also be zero. As a result, it is possible to completely eliminate the generation of the cedar pattern on the cut surface as in the conventional case, and it is possible to obtain an extremely smooth cut surface. Further, if the relative movement speed is slower than 0.5 m / min, the cutting efficiency of the cake is poor, and if it is faster than 20 m / min, the reciprocating vibration speed of the piano wire must be increased accordingly, and the vibration If the reciprocating vibration speed of the piano wire is too fast, the piano wire will wavy and the cutting work will be difficult, and if it is too slow, the cut surface of the cake will become fluffy and rough. Occurs. In the present invention, by setting the relative moving speed within the range of 0.5 to 20 m / min, it becomes possible to reliably prevent the occurrence of the above defects.

f. Embodiment One embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a cutting device for carrying out the cutting method according to the present invention, wherein FIG. 1 is a front view of the device, FIG. 2 is a plan view of the device, and FIG. Shows a side view of the device. In FIG. 1, reference numerals 1 and 2 denote a pair of rails laid in a horizontal direction and parallel to each other, and a carriage 3 can travel on the pair of rails 1 and 2. The dolly 3 can load the semi-plastic cake 4, and the cake 4 demolded from the mold is conveyed to the cutting process while being placed on the dolly 3.

A slightly higher base 5 is constructed on both sides of the pair of rails 1 and 2, and a pair of rails 6 and 7 parallel to the rails 1 and 2 are laid on the base 5. On the pair of rails 6 and 7, a pair of moving bases 8 and 9 are respectively arranged as shown in FIGS. 1 to 3, and the pair of moving bases 8 and 9 are provided.
The left and right ends of the U-shaped frame 10 are supported by. The movable tables 8 and 9 are driven by a driving device (not shown). Specifically, the frame 10 is arranged so as to straddle the cake 4,
Both ends of 10 extend to a position slightly lower than the pair of rails 6, 7. A pair of guide rollers 11 and 12 are attached to both ends of the frame 10, and a pair of drive rollers 13 and 1 are attached to both shoulders of the frame 10 (bents bent at right angles).
4 is installed. And these four rollers 11-1
An endless piano wire 15 is hung on the 4 and a part of the piano wire 15 is stretched at a position crossing the cake 4. The piano wire 15 is moved to the first position by the rotation of the pair of drive rollers 13 and 14.
It is designed to move in the direction of the arrow in the figure. A tension roller 16 is attached to an intermediate portion of the frame 10 in a state of being urged downward by a spring, and a predetermined tension is applied to the piano wire 15 by the tension roller 16.
In addition, a pair of auxiliary rollers are provided inside both ends of the frame 10.
17, 18 are attached, and the pair of auxiliary rollers 17, 18 support the horizontal force acting on the piano wire 15 when the cake 4 is cut.

More specifically, the pair of drive rollers 13 and 14 are configured to be rotationally driven alternately in both forward and reverse directions at a predetermined cycle. In the present embodiment, the pair of drive rollers 13 and 14 are rotationally driven in the same direction in a range in which the joint fitting 19 of the piano wire 15 extends from one guide roller 11 to the other guide roller 12 via the tension roller 16. Is configured. Therefore the piano wire
Vp of 15 round-trip average speed (average speed of joint fitting 19)
When the reciprocating movement distance of the metal fitting 19 is Lm, the rotation cycle T of the drive rollers 13 and 14 (the time from the start of normal rotation (reverse rotation) to the start of the next normal rotation (reverse rotation)) is L / Vp. The frequency f (times / minute) of the piano wire 15 is Vp / L. In this embodiment, Vp = 0.3 to 30 m / min and L = 2.0 to 10 m are set, so that 4 seconds <T <33.3 minutes, 0.03 <
f <15 times.

The drive devices for the movable bases 8 and 9 operate in synchronization with the reversing cycle of the drive rollers 13 and 14. More specifically, as shown in FIG. 4, when the velocity Vp of the piano wire 15 becomes 0 (the moment when the driving rollers 13 and 14 are reversed), the moving velocity V _B of the moving bases 8 and 9 becomes 0.
The drive devices for the movable tables 8 and 9 are controlled so that

Cutting the cake 4 with the cutting device configured as described above
This is done by moving the movable bases 8 and 9 or the frame 10 in the direction of arrow c in FIGS. 2 and 3 while alternately reciprocating the piano wire 15 in the directions of arrows a and b in FIG.

Since in this embodiment the frequency f of the piano wire 15 is very small as 15 times / min or less, the movement control of the moving base 8 and 9 is made easily and accurately, thus as shown in FIG. 4 of the Vp and V _B 0
Can be accurately matched with each other, and thus it is possible to completely prevent the generation of the cedar pattern on the cut surface of the cake 4.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be appropriately modified as necessary. For example, the extension of the piano wire 15 is not necessarily endless, and if there is sufficient surrounding space, the piano wire may be extended in a straight line in the horizontal direction and the piano wire may be reciprocally oscillated. Although the frame 10 is moved in the above embodiment, the frame 10 may be fixed and the cake 4 may be moved.

g. Effects of the invention As described above, the present invention causes the piano wire to reciprocally vibrate at an amplitude of 1 m or more and at a speed of 0.3 to 30 m / min. Therefore, the reciprocating frequency of the piano wire is 15 times / min. It can be: Therefore, when the movement of the piano wire in the direction perpendicular to it is controlled to be 0 at the moment when the vibration speed of the piano wire becomes 0, the control can be performed easily and surely, and thus the cereal pattern on the cut surface of the cake can be obtained. Can be completely resolved,
It is possible to obtain a very smooth cut surface. Also, by making the cut surface smooth, it is possible to improve the yield of ALC powder spray and the finishing agent applied to the panel surface. further,
The present invention surely moves the cake and the piano wire at a relative moving speed of 0.5 to 20 m / min in a direction perpendicular to the reciprocating vibration direction of the piano wire, thereby ensuring that the piano wire is wavy and the cutting work becomes difficult. Therefore, it is possible to avoid the disadvantage that the cut surface of the cake is fluffy or rough.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, wherein FIG. 1 is a front view of a cutting device, FIG. 2 is a plan view of the same device, and FIG. 3 is a side view of the same device. It is a figure. Moreover, FIGS.
FIG. 5 shows a conventional example, FIG. 5 is a schematic view of a conventional cutting device, FIG. 6 is a schematic view of another conventional cutting device,
FIG. 7 is a velocity diagram for explaining the operating condition of the apparatus shown in FIG. 1,2,6,7 …… rail, 3 …… carriage, 4 …… semi-plastic cake, 8,9 …… moving base, 10 …… frame, 11,12 …… guide roller, 13,14 …… driving Roller, 15 ... endless piano wire, 16 ... tension roller, 17,18 ... auxiliary roller, 19 ... joint metal fittings.

Claims (1)

[Claims] 1. A tensioned piano wire is pressed against a semi-plastic cake, and while the piano wire is reciprocally vibrated in its longitudinal direction, the cake or the piano wire is moved in a direction perpendicular to the reciprocating vibration direction. In the cutting method for cutting, the piano wire with an amplitude of at least 1 m or more, and with reciprocating vibration motion at a speed of 0.3 to 30 m / min, the cake or piano wire 0.5 ~ in the direction perpendicular to the reciprocating vibration direction. When moving at a speed of 20 m / min and the speed of the reciprocating vibration motion of the piano wire becomes 0,
A method for cutting a semi-plastic cake, characterized in that the moving speed of the cake or piano wire is controlled to be zero.