JPH0669897B2 - Numerically controlled cutting device for thick glass - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cutting and breaking apparatus for thick plate glass, and in particular, incorporates a series of mechanisms such as positioning, numerical control cutting and breaking of glass of 10 mm or more. Regarding the device.

INDUSTRIAL APPLICABILITY The present invention can be widely applied to glass articles such as architectural window glass for middle and high-rise buildings, various interior materials, furniture furniture, etc., and particularly provides an apparatus capable of intensively cutting thick glass sheets. To do.

(Prior Art) Conventionally, various methods have been used for cutting a glass plate, and after a cutting line is attached to a glass surface with a tip which is usually made of a diamond or cemented carbide chip,
A method of cutting by advancing a crack along this cutting line has been performed, and as means for promoting the crack, for example, JP-A-53-88817, a mechanical method of pressing to cause bending, As such an apparatus, for example, Japanese Utility Model Laid-Open No. Sho 58-65329 discloses a base provided with a linear projection which can be brought into contact with a workpiece along a cutting cutting line, and a vertical movement so that the linear projection appears on the upper surface of the base. It comprises a work holding plate which is free and on which a work can be placed, and a pressing means which is provided above the work holding plate and presses the work while opening the legs on both sides of the projection. A cutting device for a plate-shaped glass or the like configured to generate a tensile stress while applying a pressing force to the work by means, and Japanese Patent Publication No. 56-2662 previously proposed by the present applicant.
The one disclosed in Japanese Unexamined Patent Publication No. 0 is composed of parallel plates in which one ends are opposed to each other and the other ends are separately pivoted, and one side of each of the opposed ends is juxtaposed with a gap of the thickness of the split glass plate. A gripping member having a gripping tool, a push-up plate arranged in parallel with the gripping member and having one end as a free end and the other end as a pivot end, a means for rotating the push-up plate about the pivot end, and the grip A plate is provided, a protruding pin is provided on one of the other surface of the gripping member, the side surface of the push-up plate, and the support plate, and a notch long groove is provided at the other, and the protruding pin is slid on the notch long groove. There is a plate glass breaking device that connects by movably inserting and inserting, and the rotation of the push-up plate causes one gripping member to rotate more than the other gripping member through the support plate, and further uses thermal stress As a cutting method to be performed, for example, Japanese Patent Publication No. 55-29942 In the report, an electric resistance wire having a predetermined cutting shape is installed on the surface to be cut of the glass plate, then the electric resistance wire is energized to heat the surface to be cut, and the cross section to be cut is heated. Generate stress, then by dropping water droplets on one of the ends to be cut of the glass plate to cool it, to generate local cracks at the end of the glass plate, and then to generate cracks. A method of instantaneously cutting a glass plate by progress is disclosed.

(Problems to be Solved by the Invention) As described above, in the cutting method in which the cutter of the conventional Japanese Patent Laid-Open No. 53-88817 is used to make a nick and bend is used, when the thickness is large, for example, 10 mm or more. It is difficult to cut, and by engraving a cutter wire on the surface of the glass plate, there is not necessarily a reliable and clean uneven chip or jagged,
Further, it is almost impossible to obtain a cutting edge or a cutting surface that does not deviate from the planned cutting line, and it is difficult to obtain a cutting surface perpendicular to the front and back surfaces of the glass. In the folding device disclosed in Japanese Patent No. 65329, the thickness of the glass plate is up to about 6 mm, and if it exceeds that, the cut surface perpendicular to the front and back surfaces in the latter half of the folding tilts toward the small plate side of the glass plate to be cut. , There is a problem such as tilting toward the large plate in the first half of the crease.
In the case of the publication, when the weights of the glass plates arranged on both sides of the cutting are different, a large rotational force related to the breaking force is applied to the side of the glass plate having a small weight, and the side of the glass plate having a large weight is applied. Is an attempt to obtain a good split surface by maintaining a balance of split forces on both sides of the cut muscle by applying a small rotational force that is related to the split force, but with a thin plate or a relatively small area. Even if the folding is good, in the case of a large plate that is unequally cut with thick glass, the breaking force increases as the supporting area of the glass plate increases due to progressive cutting, so the balance is upset and the cut surface inclines as described above. there were. Furthermore, in the method described in JP-B-55-29942,
Cutting of the ears, that is, when the stress distribution in the glass is non-uniform, the cutting line tends to deviate from the planned line, and this tendency becomes greater especially as the size of the glass plate increases or the unequal cutting occurs. Become.

Either way, especially for thick glass plates,
The smaller the cutting interval, and the more unequal the cutting interval of the glass to be cut, the more difficult it is to obtain a clean cut surface that is perpendicular and smooth to the glass surface and does not reduce the strength. It was difficult to obtain a clean cut surface without deviation near the edge immediately after the start and immediately before the end.

(Means for Solving Problems) The present invention has been made in view of such problems in the related art, and particularly, a glass plate having a thickness of 10 mm or more, which requires skill and is difficult until now, has a clean cut surface. Moreover, the present invention provides a cutting device that does not deviate from the cutting line such as horns and chips.

In order to achieve the above object, the present invention abuts and presses a cutter of a cutter head that travels in the X and Y axis directions against the surface of a thick glass plate positioned on an air table that can switch discharge or intake air from an air hole. Then, a cutting mechanism for giving a cutting line, a support base for abutting and supporting the lower surfaces of both sides of the cutting line on its upper surface, and a pivotal support in the front-back direction rotatably supported on the back side of the support base. A hammer projecting from the center and abutting against the thick plate glass; a pair of pinching parts for sandwiching the thick plate glass in front of both sides of the support base and pivotally supported to a fixed shaft on the back surface so as to be rotatable left and right; In a numerically controlled cutting device for thick glass, in which a breaking means composed of an up-and-down moving part for raising and lowering a support table is disposed on the edge side of the air table, the breaking means sandwiches the corners of the air table. Each side A numerically controlled cutting device for thick plate glass, which is arranged at the edge and can be numerically controlled to move the breaking means through a sliding base along a breaking rail laid under the end edge, and the breaking means side A numerically controlled cutting device for a thick glass plate, which comprises a positioning mechanism having a plurality of cylindrical gauge blocks protruding and retracted from the back surface of the table located above and floating above the edge apart from the edge. provide.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing a main part of a breaking means, a part of which is cut away,
2 is a front view of FIG. 1 seen from the opposite side, FIG. 3 is a perspective view for explaining the attachment of the hammer portion, and FIG. 4 is A of FIG.
-A sectional view showing a cut surface, FIG. 5 is an overall perspective view showing the configuration of the gauge block, FIG. 6 is an overall plan view, and FIG.
The figure is a side view showing the whole.

A large number of air holes are provided on the surface, and rails 2 and 2 in the Y-axis direction are arranged below the opposite edges of an air table 1 capable of switching discharge or intake air from the air holes, and along the rails. It consists of a bridge 3 that can traverse and a cutter head 4 that can travel along the length of the bridge, that is, along the X direction. The cutter 5 is arranged on the cutter head and the pressing force and traveling speed have been adjusted in advance on the air table 1. A cutting mechanism for giving a scoring line 7 to the thick plate glass 6 and a breaking means 8 for cutting the thick plate glass are processed by numerical control, and a gauge for positioning the thick plate glass 6 on the air table 1 is additionally provided as an accessory. It is provided.

Arranged on each of the two sides of the air table 1 sandwiching the corner,
The splitting means 8 which moves along the edge is formed by loosely fitting a sliding base 10 fixed to the side surface of a cover-shaped mounting seat 9 surrounding the three sides on a split rail 11 laid under the edge. Although it can be moved by a motor (not shown), the mounting seat 9
Inside the cover, a pinching part 12 , which will be described later, a support 13 and a vertically moving part 15 for raising and lowering a hammer 14 and the like are housed and fixed, and a two-stage lifting cylinder 16 and a housing cylinder are provided in the center of the mounting seat. 17 is vertically suspended and the piston rod of the cylinder for vertical movement is connected to an up-and-down base 18 having an inverted concave shape, and the vertical movement of the rod is fixed to both sides of the up-and-down base 18 and a pair of guide rods 19 are suspended. But the cylinder
A pair of guides 20 fixed to both sides of 16 and 17 are loosely fitted, and the descending base 18 moves up and down along the guides.

As shown in FIGS. 3 and 4, on the upper surface of the elevating base 18, a groove 21 is formed in the center, and on the rear surface located on the opposite side of the air table 1, brackets 22, 22 and a fixed shaft 23 are mounted. 13
The seat, but the groove 21 of the support base and the bracket
Insert an L-shaped hammer 14 that can be tilted and protrudes and retracts from the upper surface of the support base 13 into the gap between the 22 and 22, and attach the end of the hammer 14 to the bracket.
An impact cylinder 24, which is a drive source for tilting the hammer, is attached to the shaft 22 and below the bracket.

A pair of sandwiching parts 12 for sandwiching the thick plate glass 6 are arranged on both sides of the support base 13, and the sandwiching parts are pivotally supported by a fixed shaft 23 fixed to the support base 13 and a breaking cylinder 25. Clamp arms 26, 26 connected to the clamp arms 27, 27, and clamp heads 27, 27 that rotate integrally with the fixed shaft 23 in the opposite direction about the fixed arm 23.
Clamp fingers 28, 28 fixed to one end of the head and abutting the lower surface of one end of the thick glass plate 6 protruding from the edge of the air table 1, and rotating cylinders 29, 29 attached to the rear end. Further, the clamp heads 27, 27 are composed of respective members of a clamp attach 30, 30 which rotates on the rising upper surface of the clamp head, and the rotation of the clamp attach is performed by inserting / removing a rod (not shown) of the rotating cylinder 29.
By turning a gear (not shown) provided in 27, the vertical shaft 31 integrated with the gear is turned, and the clamp attachments 30, 30 projecting in parallel are turned 90 degrees in series, or vice versa. Rotate.

Next, as a positioning mechanism, a plurality of block gauges 39 are arranged in a straight line along the edge side of the air table 1 located on the side of the folding means 8 , the attachment of which is entirely housed on the back surface of the air table. The fixing plate 32, which is attached to the bottom of the back surface of the air table 1, seats a cylinder 33 with the end of the rod 34 facing the edge of the table, and guide rails 35, 35 laid on both sides of the cylinder and end portions. A stopper 37 for preventing sliding of a moving plate 36 described later is provided, and a movable bearing plate 36 slidable along the guide rail is provided with standing bearing plates 38, 38 at the upper end of the plate. Between the bearing plates, a tilting plate 40 having a cylindrical gauge block 39 fixed to the front surface is mounted, and on the back surface of the tilting plate, a rotatable shaft 41 is rotatably mounted, and one end of the tilting plate is a key shaft. The other end is bifurcated, and the rod 34
A knuckle joint (not shown) whose ends are joined to each other by a pin is connected to the cylinder 33, and the tilting plate 40 is tilted integrally with the rotary shaft 41 by moving the cylinder rod in and out, but the end of the rotary shaft 41 that rotates integrally. An L-shaped rotary lever 42 is keyed to the mounting plate 43 which is erected on the end of the lever and the moving plate 36.
A spring 44 is stretched in between, and a stopper 45, which is adjustable as a rotation stop for the rotation lever 42, that is, a rotation stop of the tilting plate 40, is attached to the bearing plate 38.

A bar 50 protruding from and retracting from the upper surface of the air table 1 is provided, but the bar is used when a bar having a size that can be manually broken is broken without using the breaking means 8. Is.

The operation and action of the present invention will be described below.

The thick glass plate 6 transferred to the air table 1 by a transport device (not shown), for example, a vacuum lift, is placed on the table, floats by the air blown from the air table 1, and stands by.

On the other hand, the positioning mechanism accommodates the cylinder rod 34 on the back side of the air table 1 and waits in a state in which the tilting plate 40 is tilted by the tension of the spring 44. However, when the cylinder 33 is operated, the cylinder rod 34 is projected. A knuckle joint (not shown) that is connected to the rod moves the moving plate 36 through the rotating shaft 41 that stops and the bearing plate 38 of the shaft support, and the tip of the moving plate 36, that is, the gauge block 39.
The movable plate 36 is pushed out to a predetermined position where the portion is separated from the edge of the air table 1, and abutted against a stopper 37 standing on the tip of the fixed plate 32 to stop.

Further, the knuckle joint connected by the protrusion of the cylinder rod 34 causes a rotating action about the rotating shaft 41 and pushes up the tilting plate 40 fixed to the rotating shaft 41, but is keyed to the end of the rotating shaft 41. The rotating lever 42 tilted by the tension of the spring 44 also follows, and when the end of the lever abuts against the stopper 45, the tilting plate 40 that has been pushed up becomes horizontal and is fixed on the tilting plate. The gauge block 39 is separated from the edge of the air table 1 and protrudes upward from the upper surface of the table, and a plurality of gauge blocks 39 are simultaneously arranged on two sides of the air table 1 with the corners therebetween and parallel to each side. Are arranged in.

When the thick glass plate 6 standing by on the air table 1 is manually moved to bring the glass end face into contact with the gauge block 39 and blown air is switched to suction, the thick glass plate 6 is adsorbed at the position where it is positioned on the air table 1. After being fixed, the gauge block 39 is subsequently stored in the back surface of the air table 1.

Subsequently, the cutter head 4 in which the numerical control of the cutting dimension is set in advance is moved based on the numerical data. For example, the cutter head 4 traverses to a position defining the Y direction on the bridge 3,
The bridge 3 continues to run on the rails 2 and 2 in the X direction. In the X or Y direction at that time, the cutter 5 droops and presses the surface of the thick glass plate 6 to give the scoring line 7. The travel in the X and Y directions is calculated by calculating the shortest movement, and therefore the travel order in the X and Y directions is not the same.

The cutter head 4 having the cutting lines 7 applied to a predetermined position in the X and Y directions moves to a position away from the air table 1 and waits for the next command.

The folding means 8 which rotates the parallel clamp attachments 30, 30 in series and stands by at the corner of the air table 1 moves while being controlled by the numerical data of the numerical control for cutting by the operation of a motor (not shown), for example. The breaking means 8 moving in the X direction moves along the rails 11 and stops when the center of the hammer 14 reaches the position of the score line 7 applied to the thick plate glass 6, and then moves up and down by the operation of the storage cylinder 17. The base 18 rises to a certain position, and the upper surface of the support base 13 and the upper surface of the clamp finger 28 of the holding portion 12 come into close contact with the lower surface of the thick glass plate 6, and then the rotation cylinders 29, 29 are actuated to clamp. The attachments 30 and 30 are rotated by 90 °, and the clamp fingers 28 and 28 and the clamp attachments 30 and 30 sandwich the scoring line 7 to sandwich the thick glass plates 6 on both sides.

Subsequently, when the impact cylinder 24 is operated, the L-shaped hammer 14 projects upward from the groove 21 formed in the support base 13 and collides with the lower surface of the cut line 7 to give an impact, which is commonly known as new. Clamp arms 26, 26 are opened around the fixed shaft 23 by the interlocking of the splitting cylinder 25 after making a crack, but the clamp heads 27, 27 integrated with the arm are tilted in the opposite direction, that is, in a C shape. A clamp finger 28 for sandwiching the thick glass plate 6 integrally with the clamp head,
28 and the clamp attachments 30 and 30 apply a bending load to the thick glass sheet 6 with the support base 13 as a fulcrum, and at the same time, the vertical cylinder 16 is operated to raise the elevating base 18 to lift one end of the thick glass sheet 6. As the glass rises, the rod of the breaking cylinder 25 is operated in the contracting direction,
With the contraction of the rod, the bending load initially applied is reduced, and the thick glass sheet 6 is raised.

The other end is supported on the air table 1 by lifting one end of the thick plate glass, and the new progresses along the score line 7 and the crease points move sequentially along the slope. The area of the glass to be cut increases and the bending moment acting on the fold breaking point also tends to increase, but the reverse action of the fold breaking cylinder 25 gradually decreases the initial bending moment and acts on the fold breaking point. The total bending moment is controlled.

After the cutting, the vertical movement cylinder 16 is operated to lower the elevating base 18, and then the rotation cylinders 29 and 29 are operated to rotate the clamp attachments 30 and 30 around the vertical shafts 31 and 31 to move the thick glass plate 6. After the clamped state is released, the raising / lowering base 18 is lowered to a predetermined position by the rod storing operation of the storing cylinder 17. Then, it moves to the position of the adjacent cutting line 7, and after repeating the above-mentioned operation, the splitting means 8 in the other axis direction is operated.

The strokes of the breaking cylinder 25 and the vertical movement cylinder 16 are adjusted and set in advance according to the plate thickness according to the thickness of the thick plate glass 6, and the supporting table 13, the clamp fingers 28, 28, and the clamp attach 30, 30 which come into contact with the thick plate glass 6 are set. Each contact surface is
A soft felt or the like is applied to prevent scratches on the glass.

Even if one end of the thick plate glass 6 is lifted on the air table 1, there is no displacement due to the suction action of the table, and the folding means
There is no problem even if the positioning movement of 8 , that is, the traveling to below the score line 7 is automatically moved by numerical control.

In the bending by the clamp fingers 28, 28 and the clamp attaches 30, 30, by bringing the upper surface of the support base 13 which is the center of rotation of the bending into contact with the lower surface of the thick glass plate 6, it is possible to control the opening of the glass at the time of folding, This prevents the generation of thin sharp projections formed on the back surface of the glass plate due to the tensile stress acting at right angles to the cut surface.

It is convenient to use the fold bar 50 to manually perform the work of the thick plate glass 6 that does not require skill or the like, for example, the relatively large equally-divided thick plate glass 6.

(Effects of the Invention) The present invention is an apparatus for automatically moving the breaking means to the position of the cut line by numerical control, which is suitable for cutting thick glass sheets, particularly glass sheets having a thickness of 10 mm or more. While gradually reducing bending stress, the thick glass is lifted to adjust the bending action of the latter half of the fold, and even in unequal cutting, there is no step or protrusion on the cutting surface reliably along the cutting line of the cutter. A clean cut is obtained, and it contributes to labor saving.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a perspective view showing a main part of a splitting means which is partially cut away, FIG. 2 is a front view of FIG. 1 seen from the opposite side, and FIG. FIG. 4 is a perspective view for explaining the attachment of the hammer portion, FIG. 4 is a cross-sectional view showing a cross section taken along the line AA in FIG. 3, FIG. 5 is an overall perspective view showing the configuration of the gauge block, and FIG. The plan view shown in FIG. 7 is a side view showing the whole. 1 ... Air table, 4 ... Cutter head 5 ... Cutter, 6 ... Thick plate glass 7 ... Cutting line, 8 ... Breaking means 12 ... Clamping part, 13 ... Support base 14 ... Hammer, 15 …… Vertical movement part 39 …… Gauge block

Claims (2)

[Claims] 1. A striated line is formed by abutting and pressing a cutter of a cutter head traveling in the X and Y axis directions on the surface of a thick glass plate positioned on an air table that can switch discharge or intake air from an air hole. A cutting mechanism for squeezing, a support base that abuts and supports the lower surfaces on both sides of the cutting line on its upper surface, and is pivotally supported on the back side of the support base so as to be rotatable in the front-back direction and project from the center of the upper surface to the thick glass plate A hammer that strikes against each other, a pair of sandwiching parts that sandwich the thick plate glass in front of both sides of the support and that are pivotally supported by a fixed shaft on the back and can rotate left and right, and a top and bottom that raises and lowers the support. In a numerically controlled cutting device for thick glass, in which a breaking means composed of a moving part is disposed on the edge side of the air table, the breaking means is provided on each of the two side edges sandwiching the corner of the air table. Arranged, the folding means Numerical control cutting apparatus plank glass, characterized in that for moving the numerical control along a bend-breaking rails laid on the bottom of the edge through the sliding board. 2. A positioning mechanism having a plurality of cylindrical gauge blocks, which protrude from the back surface of the table located on the side of the splitting means, and float upwardly apart from the edge, along the edge. 2. A numerically controlled cutting device for thick glass according to claim 1, comprising: