JP2001113516A - Cutting apparatus for semiplastic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut an uncured semiplastic material precisely in a desired thickness, length and width and also to improve a product yield and a commodity value on the occasion of manufacturing an aerated lightweight concrete(ALC) panel or the like, for instance. SOLUTION: A cutting apparatus of a semiplastic material has a tilting- turning mechanism 1 which tilts and turns the semiplastic material W at an angle of about 90 degrees and puts it on a transfer stage, a first cutting mechanism 2 which moves horizontally a frame body 21 having practically-horizontal linear bodies 23 for cutting provided vertically in a row at prescribed intervals and cuts thereby the semiplastic material on the transfer stage 15 in a prescribed thickness, and a second cutting mechanism 3 which cuts the semiplastic material in a desired length, lowering vertically a frame body 31 having practically- horizontal linear bodies 33 provided horizontally in a row at prescribed intervals. In this apparatus, linear bodies for cutting the semiplastic material in a prescribed width are provided at least in the frame body of either the first or second cutting mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for manufacturing foamed cellular concrete (ALC) panels and the like. The present invention relates to an apparatus for cutting a semi-plastic body used for cutting into pieces.

[0002]

2. Description of the Related Art Conventionally, for example, the width is 60 cm and the thickness is 7.
When manufacturing an ALC panel having a length of 5 to 25 cm and a length of 90 to 600 cm, first, the width of the inner method is about 150 cm,
A reinforcing steel bar is set in accordance with the number of panels in a rectangular parallelepiped box-shaped frame having a length of about 600 cm and a depth of about 65 cm. Thereafter, when a predetermined time has passed and the material has been cured to a semi-plastic state, the rectangular plastic body is taken out of the mold, moved to a cutting device, and cut into a predetermined width, thickness and length. Then, the cut semi-plastic body is inserted into an autoclave and steam-cured at a high temperature and a high pressure to obtain an ALC panel having a predetermined size. After that, according to the specifications of each panel, the cutting device performs chamfering, grooving, surface processing, and the like on the small edge, and then ships the product.

[0003] By the way, various types of cutting devices for semi-plastics as described above have been developed in the past. For example, although not shown in the figure, the semi-plastics are taken out of the mold and lifted. Then, a cutting linear body such as a vertical piano wire is moved in a direction perpendicular to the semi-plastic body and cut to a desired length. Thereafter, the semi-plastic body is placed on a machine base on which the divided bottom plate can be raised and lowered, and the linear body is vertically stretched at intervals of the panel thickness, and the frame body is cut to a desired thickness. There is. However, in the above method, the semi-plastic body is cut to a desired length in a suspended state, and also cut to a desired width on a special machine base. When the frame passes, the bottom plate portion is cut while sequentially moving up and down. So, in addition to the complexity of the device,
When the bottom plate moves up and down, the semi-plastic body may be impacted to cause partial cracking or chipping.

[0004] As a method other than the above, which is also omitted in the figure, the semi-plastic body is mounted on a carriage in a state of being tilted at a right angle and moved, and the linear body is moved at intervals of the panel thickness. There is also a method of cutting by passing through a horizontally stretched frame. However, this method has a problem that a long and heavy semi-plastic body having a length of 6 m is horizontally moved, so that a large work area is required and the equipment cost is high.

As another method, a cutting apparatus as shown in FIGS. 6 to 8 has been proposed. This cutting device includes a semi-plastic body previously formed into a predetermined shape by a substantially box-shaped formwork (not shown) having an upper surface composed of a bottom plate and a side plate, together with the bottom plate P with the side plate removed. 9
A tilting mechanism 1 for tilting by 0 degrees, a first cutting mechanism 2 for cutting the tilted semi-plastic body W to a desired thickness, and a second cutting for cutting the semi-plastic body W to a desired length A mechanism 3 and the like are provided.

The tilting mechanism 1 is provided with a plurality of L-shaped tilting arms 10 arranged in parallel, and a fluid cylinder or the like, not shown, centered on a common support shaft 10a penetrating a corner of each arm 10. Is tilted by about 90 degrees. Further, on one arm piece 11 of the tilting arm 10, a receiving base 14 for mounting and fixing the semi-plastic body W together with the bottom plate P and its support frame F is provided so as to be movable in the longitudinal direction of the arm piece 11, On the other arm piece 12, a transfer table 15 having a comb-like upper surface is provided so as to be movable in the longitudinal direction of the arm piece 12.

As shown in FIG. 7, the first cutting mechanism 2 comprises a pair of right and left substantially horizontal guide rails 22 provided below the upper horizontal side 20a of the gate-shaped gantry 20 so as to be orthogonal thereto.
The frame 21 is provided so as to be movable along the line 21. Between the opposing pieces 21a of the frame 21, a cutting linear body 23 such as a substantially horizontal piano wire for cutting the semi-plastic body W to a predetermined thickness. Are arranged in parallel in the vertical direction. In the vicinity of the guide rail 22, an endless transmission cable 25 such as an endless chain or wire having both ends connected to the frame body 21 is provided with a plurality of guide rollers 25a, winches 26, and the like. The frame 21 is suspended so as to surround the rail 22, and the frame 21 is reciprocated in the horizontal direction at a predetermined speed by rotating the winch 26 forward and backward by a motor or the like not shown in the drawing.

As shown in FIGS. 6 and 7, the second cutting mechanism 3 is provided with four frame members 31 each having a substantially horizontal plane and a substantially square frame 31 provided at four corners thereof so as to stand substantially vertically. The pedestal 20 is provided so as to be vertically movable via a guide rod 32, and a semi-plastic body W is provided between opposing sides of the frame 31 in the front-rear direction in FIG.
6, a plurality of substantially horizontal linear bodies 33 (see FIG. 7) are cut in parallel in the left-right direction in FIG. As shown in FIG. 7, a pair of hydraulic cylinders 34 are provided on both left and right sides of the frame body 31 in FIG. 6, and the frame body 31 moves up and down by moving a piston rod of the hydraulic cylinder 34 forward and backward. It is.

In the above configuration, when the cutting of the semi-plastic body W is started, the tilting arm 10 of the tilting mechanism 1 is used.
8 is initially in the standby state shown in FIG. 8, and the receiving table 14 is at a position away from the transfer table 15. Also, the second frame 2 of the first cutting mechanism
The frames 31 of the first and second cutting mechanisms 3 are waiting at the solid line positions in FIG. In this state, the semi-plastic body W formed into a predetermined shape by a substantially box-shaped formwork (not shown) having an open upper surface composed of a bottom plate and a side plate is removed with the side plate removed as shown in FIG. The bottom plate P and the supporting frame F supporting the bottom plate P are carried in by a crane or the like and placed on the receiving table 14 of the tilting mechanism 1. Conventionally, the upper surface of the semi-plastic body W is previously cut to a predetermined height. After that, it is placed on the cradle 14.

Next, the receiving table 14 is moved rightward in FIG. 8 so that one vertical surface of the semi-plastic body W is transferred to the transfer table 15.
After that, the tilting arm 10 is tilted approximately 90 degrees clockwise in FIG. 8 to transfer the semi-plastic body W onto the transfer table 15, and the transfer table 15 is horizontally moved to the right. The semi-plastic body W is moved away from the bottom plate P as shown in FIG. 7 and stopped at a predetermined cutting position. In this state, the winch 26 of the first cutting mechanism 2 is rotated forward by a motor not shown in the figure to move the frame 21 to the left in FIG. The semi-plastic body W by the body 23
Is cut to a predetermined size (a vertical dimension in FIG. 7). Further, by extending the piston rod of the hydraulic cylinder 34 of the second cutting mechanism 3 and lowering the frame 31, the length of the semi-plastic body W is reduced by the substantially horizontal linear body 33 in the frame 31 (see FIG. 6 is cut into a predetermined size.

After the above cutting work is completed, the piston rod of the hydraulic cylinder 34 is contracted to
, The transfer table 3 is moved to the left in FIG. 7 so that the side surface of the semi-plastic body W abuts on the bottom plate P, and the tilt arm 10 is tilted in the opposite direction to the above-described receiving table. At the same time, the receiving table 14 is returned to the position indicated by the solid line in FIG. 8, the semi-plastic body W is separated from the transfer table 15, lifted together with the bottom plate P by a crane or the like, and carried out to the next step. At the same time, the winch 26 of the first cutting mechanism 2 is reversed to return the frame body 21 to the original position, thereby entering a standby state. The above operation is repeated to cut the semi-plastic body sequentially.

[0012]

However, in the above-mentioned conventional cutting apparatus, the surface where the semi-plastic body W abuts on the bottom plate P is used without being cut, so that the bottom plate 1 is subjected to thermal distortion or the like. If the mold is deformed or a release agent is attached, the cutting dimensional accuracy of the semi-plastic body W is reduced, or one of the long sides is contaminated with the release agent or the like, and the commercial value is reduced. There was a problem such as doing.

The second cutting mechanism 3 in the above conventional example
Since the frame 31 is moved up and down by two hydraulic cylinders 34, it is difficult to move the large frame 31 up and down while maintaining the horizontal state even if the guide rod 32 is provided. A displacement often occurs between the moving position of the linear body 33 at the time of descent and the moving position at the time of ascending, so that the cut surface becomes non-uniform and the dimensional accuracy is reduced. There were problems such as a decrease in product value.

The present invention has been proposed in view of the above problems, and enables a semi-plastic body to be cut to a desired thickness, length, and width with high accuracy, and improves product yield and commercial value. It is an object of the present invention to provide a device for cutting a semi-plastic body which can be used.

[0015]

Means for Solving the Problems To achieve the above object, a cutting device for a semi-plastic body according to the present invention has the following configuration. That is, about 9 square plastic bodies
A tilting mechanism that is tilted by 0 ° and placed on a transfer table, and a frame formed by arranging a substantially horizontal cutting wire such as a piano wire at predetermined intervals in a vertical direction, A first cutting mechanism for moving the semi-plastic body mounted on the transfer table in a predetermined direction and cutting the semi-plastic body to a predetermined thickness, and arranging substantially horizontal linear bodies at predetermined intervals in the horizontal direction. And a second cutting mechanism for cutting the semi-plastic body on the transfer table to a desired length by moving the frame body in a vertical direction. Alternatively, a linear body for cutting the semi-plastic body to a predetermined width is provided in at least one of the frames of the second cutting mechanism.

With the above construction, it is possible to cut the semi-plastic body not only to a predetermined thickness and a predetermined length but also to a predetermined thickness with high accuracy, and it is also possible to prevent the edge surface from being stained. In addition, since the upper surface of the semi-plastic body does not necessarily need to be cut in advance as in the above-described conventional case, the process can be simplified accordingly. If the bottom plate is flat and free from contamination, the surface on the bottom plate side does not have to be cut and removed, and the width, thickness and length of the semi-plastic body can be reduced by changing the distance between the linear bodies. It can be changed as appropriate.

Further, the semi-plastic cutting device according to the present invention comprises:
A tilting mechanism for tilting a rectangular parallelepiped semi-plastic body about 90 degrees and placing it on a transfer table, and a cutting line such as a substantially horizontal piano wire are arranged in parallel at predetermined intervals in the vertical direction Frame
A first cutting mechanism that moves in a horizontal direction and cuts the semi-plastic body placed on the transfer table to a predetermined thickness, and a row of substantially horizontal linear bodies at predetermined intervals in the horizontal direction. A semi-plastic body cutting device having a second cutting mechanism for vertically moving the frame body to cut the semi-plastic body on the transfer table to a desired length. A frame body of the mechanism is formed in a substantially rectangular shape in a plane, and guide rods are integrally provided at four corners thereof, and an elevating mechanism for vertically moving the four guide rods in synchronization is provided.

As described above, the frame body of the second cutting mechanism is formed in a substantially rectangular plane, and the guide rods are integrally provided at the four corners, and the four guide rods are moved up and down in synchronism. Is provided, it is possible to smoothly and reliably move the frame up and down while maintaining the horizontal state. In addition, it is possible to cut the semi-plastic body accurately and smoothly without shifting its position when the linear body is lowered and raised, and to improve the cutting dimensional accuracy of the semi-plastic body, product yield, and product quality. Becomes possible.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus for cutting a semi-plastic body according to the present invention will be specifically described based on an embodiment shown in the drawings. FIG. 1 (a) is a plan view showing an embodiment of a cutting device according to the present invention, FIG. 1 (b) is a front view thereof, and FIG. 2 is an enlarged side view thereof, having members having the same functions as those of the conventional example. Will be described with the same reference numerals.

The cutting device of the present embodiment includes a tilting mechanism 1 for tilting the semi-plastic body W by about 90 degrees in a state of being placed on a bottom plate P of a mold, as in the conventional example, and a tilting mechanism 1 for tilting the semi-plastic body W. A first cutting mechanism 2 for cutting the inverted semi-plastic body W to a desired thickness, and a second cutting mechanism 3 for cutting the semi-plastic body W to a desired length
Etc. are provided.

The tilting mechanism 1 is provided with a plurality of L-shaped tilting arms 10 arranged side by side in the same manner as in the above-mentioned conventional example, with a common support shaft 10a passing through the corner of each arm 10 as the center. It is configured to be tilted about 90 degrees by a fluid cylinder 13 such as a hydraulic cylinder. On one arm piece 11 of the tilting arm 10, a receiving base 14 for mounting and fixing the semi-plastic body W together with the bottom plate P and its supporting frame F is provided so as to be movable in the longitudinal direction of the arm piece 11, and the other. The transfer table 15 having a comb-like upper surface is provided on the arm piece 1.
2 are provided so as to be movable in the longitudinal direction.

The first cutting mechanism 2 includes a pair of right and left substantially horizontal guide rails 2 provided at a lower portion of the upper horizontal side 20a of the gate-shaped gantry 20 and perpendicular to the same, substantially in the same manner as in the conventional example.
A cutting line such as a substantially horizontal piano wire which cuts the semi-plastic body W to a predetermined thickness between the opposing pieces 21a of the frame body 21 is provided movably along the frame 22. Shape 2
3 are arranged in parallel in the vertical direction. In particular, in the present embodiment, as shown in FIG. 1A, a plurality (four in the case of FIG. 1) of the plurality of linear bodies 23 are provided in the left and right direction in FIG. The body 23 moves in the horizontal plane in the moving direction of the frame body 21 (the left-right direction in FIG. 1).
It is provided with a slight inclination.

In this embodiment, the frame 21
Is also provided with a linear body 24 for cutting the semi-plastic body W into a predetermined width.
The two linear bodies 24 are slightly forward (leftward in FIG. 1) of the linear bodies 23 between the positions a and a of the moving direction of the frame 21 in a vertical plane parallel to the screen of FIG. They are stretched in parallel to each other with a slight inclination (in the left-right direction in FIG. 1). A horizontal comb-shaped holding portion is disposed near the end of movement of the frame body 21 on the front side in the movement direction (left side in FIG. 1), but is omitted in the figure.

In the vicinity of the guide rail 22, a transmission cable 25 such as an endless wire or a chain having both ends connected to the frame 21 is provided with a plurality of guide rollers in substantially the same manner as in the conventional example. It is suspended so as to surround the guide rail 22 via a winch 25a and a winch 26,
The frame 21 is reciprocated in a horizontal direction at a predetermined speed by rotating the winch 26 forward and reverse through a speed reducer 28 by a motor 27. In the figure, 29
Is a tensioner that applies a predetermined tension to the transmission cable 25.

In the same manner as in the above-mentioned conventional example, the second cutting mechanism 3 is provided with four guide rods 32, each of which is provided with a substantially horizontal rectangular frame 31 standing substantially vertically at four corners thereof. The frame 31 is attached to the gantry 20 so as to be vertically movable, and FIG.
In FIG. 2B, a plurality of substantially horizontal linear members 33 for cutting a semi-plastic body are stretched in parallel in the left-right direction in FIG. The frame 31 is moved up and down by an elevating mechanism that drives the four guide rods 32 in synchronization (synchronization).
As shown in (a), a pair of countershafts 38 are synchronously rotated from a motor 35 installed on a gantry 20 via a speed reducer 36 and a coupler 37, and pinions provided at both ends of each countershaft 38. 39, the rack 32a provided on the side surface of the guide rod 32 is moved up and down in synchronization with the guide rod 32.

In the above configuration, when cutting the semi-plastic body W, the cutting operation is performed in substantially the same manner as in the conventional example, but in the present invention, the semi-plastic body W is cut as in the conventional example. Since it is not necessary to cut the upper surface of the mold in advance, the side plate S may be removed after being placed on the receiving table 14 of the tilting mechanism 1 without removing the side plate S of the formwork as in the conventional example. FIG. 2 shows this state, and the bottom plate P
A state in which the semi-plastic body W is still accommodated in the mold formed by the side plate S and the semi-plastic body W is placed and fixed on the receiving base 14 via the support frame F, and then the side plate S is removed. To represent.

In this state, the receiving table 14 is moved to the left in FIG. 2 so that the side surface of the semi-plastic body W contacts the transfer table 15 as shown by the chain line in FIG. The semi-plastic body W is tilted about 90 degrees counterclockwise to transfer the semi-plastic body W onto the transfer table 3, and then the transfer table 3 is horizontally moved to the left as shown in FIG. Is separated from the bottom plate P and stopped at a predetermined cutting position shown in FIG.

Next, when the motor 27 of the first cutting mechanism 2 is rotated forward to move the frame 21 leftward in FIG. 1, the substantially horizontal linear body shown in FIG. The thickness of the semi-plastic body W (FIG. 5)
Is the vertical dimension) and width (the horizontal dimension in Fig. 5)
Are simultaneously cut to a predetermined size. When the motor 35 of the second cutting mechanism 3 is rotated forward and the frame 31 is lowered, the length of the semi-plastic body W (in the left-right direction in FIG. Is cut to a predetermined size.

When the predetermined cutting operation has been completed as described above, the motor 35 is rotated in the reverse direction to raise the frame 31, and then the transfer table 15 is moved rightward from the state shown in FIG. The side surface of the plastic body W is brought into contact with the bottom plate P. Next, the tilting arm 10 of the tilting mechanism 1 is tilted by about 90 degrees in the opposite direction to the above, and the cut semi-plastic body W is placed on the bottom plate P
After returning to the original receiving table 14 via the supporting frame F, the receiving table 14 is horizontally moved to the position indicated by the solid line in FIG. 2 to move the semi-plastic body W on the receiving table 14 to the bottom plate P and the supporting frame. Lift with a crane etc. together with F and carry it out to the next process. At the same time, the frame 21 is returned to the original position, and the above-described cutting operation is repeated.

In the above embodiment, the linear body 24 for cutting the semi-plastic body W into a predetermined width is provided in the frame 21 of the first cutting mechanism 2. Frame 3
1 may be provided. Specifically, another linear body in a direction substantially perpendicular to the linear body 33 provided in the frame body 31 may be provided in the frame body 31 in a state of being substantially horizontally or slightly inclined vertically. . In the illustrated example, two linear bodies 24 for cutting the above-mentioned semi-plastic body W into a predetermined width are provided, but the number thereof is appropriate, and three or more linear bodies 24 are provided depending on the width of the semi-plastic body to be cut. It may be provided. Further, when cutting the surface of the semi-plastic body formed by the mold in advance with the cutting device of the present invention after cutting in advance as in the conventional case, the linear body that cuts the surface side may be omitted. If the bottom plate P is flat and free from contamination, the linear body on the bottom plate side can be omitted.

When the semi-plastic body W is cut into a predetermined width by the above-mentioned linear body, unnecessary portions on both sides of the cut portion may be carried out to the next step without removing the unnecessary portions. When the semi-plastic body W is cut to a predetermined width in the state of FIG. 3, the unnecessary portion is dropped from the transfer table 15 by its own weight, or is forcibly peeled off by a scraping means or the like and collected in a collection container or the like. Good to do. In this case, when the width of the semi-plastic body W becomes narrower than the original width by an amount corresponding to the removal of the unnecessary portion, and when the transfer table 15 is moved back to the bottom plate P by the same distance as when the state of FIG. A gap is formed between the semi-plastic body W and the bottom plate P, and in this state, when the tilting arm 10 is rotated back to the state shown in FIG. The semi-plastic body W may be deformed or damaged by the impact. To prevent this, a control means or the like may be provided so that the semi-plastic body W moves until it comes into contact with the bottom plate P when the transfer table 15 is returned to the bottom plate P side. In the case where the transfer table is moved by a fluid cylinder such as a hydraulic cylinder, the piston rod is controlled so that the advance / retreat stroke of the piston rod is different between the time of feeding and the time of returning, or a multi-stage cylinder or a plurality of fluid cylinders is used. What is necessary is just to control it.

[0032]

As described above, the apparatus for cutting a semi-plastic body according to the present invention is provided in the frame 21 or 31 of at least one of the first cutting mechanism 2 and the second cutting mechanism 3 as described above. Since the linear body 24 for cutting the semi-plastic body W to a predetermined width is provided, the semi-plastic body can be accurately cut to a predetermined thickness in addition to a predetermined thickness and length.
In addition, by cutting off the surface of the semi-plastic body on the bottom plate side, it becomes possible to prevent contamination of the fore-edge surface, and the process is simplified because it is not necessary to cut the upper surface of the semi-plastic body in advance as in the conventional case. There is an effect that it can be made.

In the semi-plastic body cutting apparatus according to the present invention, the frame 31 of the second cutting mechanism 3 is formed in a substantially rectangular plane, and guide rods are integrally provided at four corners thereof, and the four guides are provided. Since the lifting mechanism for vertically moving the rod in synchronization is provided, the frame 31 can be raised and lowered smoothly and reliably while maintaining the horizontal state. As a result, the semi-plastic body W can be cut accurately and smoothly without the displacement of the linear body 33 provided in the frame body 31 between when it descends and when it rises. This also has the effect of significantly improving the cutting dimensional accuracy of the semi-plastic body, the product yield, and the product quality.

[Brief description of the drawings]

FIG. 1A is a plan view showing one embodiment of a semi-plastic body cutting apparatus according to the present invention. (B) is the front view.

FIG. 2 is an enlarged side view of the cutting device.

FIG. 3 is the same view as in a cut state.

FIG. 4A is an enlarged plan view of a part of the cutting device.
(B) is the front view.

FIG. 5 is an enlarged side view of the frame in the first cutting mechanism.

FIG. 6 is a front view of a conventional cutting device.

FIG. 7 is a side view of the conventional cutting device.

FIG. 8 is a side view of the conventional cutting device in a standby state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tilting mechanism 2 1st cutting mechanism 3 2nd cutting mechanism 10 Tilting arm 14 Receiving stand 15 Transfer stand 20 Stand 21, 31 Frame 22 Guide rail 23, 24, 33 Cutting linear body 32 Guide rod F Support frame P Bottom plate W Semi-plastic

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3C069 AA01 BA06 BB02 BC02 BC04 CA00 CA08 CB02 CB03 EA02 4G052 FA02 FA07 FA08 FB01 FB45 4G055 AA03 AC01 BB13

Claims (2)

[Claims] 1. A tilting mechanism for tilting a rectangular parallelepiped semi-plastic body at about 90 degrees and mounting it on a transfer table, and a cutting linear body such as a substantially horizontal piano wire in a predetermined vertical direction. A first cutting mechanism for horizontally moving the frame members arranged in parallel at intervals to cut the semi-plastic body mounted on the transfer table to a predetermined thickness, and a substantially horizontal linear body And a second cutting mechanism for vertically moving the frame body arranged at predetermined intervals in the horizontal direction to cut the semi-plastic body on the transfer table to a desired length. In the apparatus for cutting a plastic body, a linear body for cutting the semi-plastic body to a predetermined width is provided in the frame body of at least one of the first cutting mechanism and the second cutting mechanism. Cutting device for semi-plastic body. 2. A tilting mechanism for tilting a rectangular parallelepiped semi-plastic body by about 90 degrees and mounting the same on a transfer table, and a vertical cutting linear body such as a piano wire in a predetermined vertical direction. A first cutting mechanism for horizontally moving the frame members arranged in parallel at intervals to cut the semi-plastic body mounted on the transfer table to a predetermined thickness, and a substantially horizontal linear body And a second cutting mechanism for vertically moving the frame body arranged at predetermined intervals in the horizontal direction to cut the semi-plastic body on the transfer table to a desired length. In the cutting apparatus for a plastic body, the frame body of the second cutting mechanism is formed in a substantially rectangular plane, and guide rods are integrally provided at four corners thereof, and the four guide rods are moved up and down in synchronization with each other. An apparatus for cutting a semi-plastic body, comprising a mechanism.