JP2009091178A - Scribing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scribing device which can scribe a thin glass sheet with low pressing force. <P>SOLUTION: A scribing unit 50 in a scribing device is composed of: a pressurizing means; a ball spline fitting unit 54 internally provided with a ball spline and arranged directly below the pressurizing means; a cutter head fitting unit 56 provided so as to be directly connected with the ball spline shaft 54b1 of the ball spline; a cutter head 57 fitted with a cutter 57b; and a pressure reducing means provided at the ball spline fitting unit 54 and reducing pressing force applied to a glass sheet. Further, as the pressurizing means, an air cylinder 53 with a sliding frictional resistance of ≤50 gf is used, and the pressure reducing means is composed of a pressure reducing apparatus 55 raising the ball spline shaft 54b1 to the upper direction using a spindle 55b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a scribing apparatus, and more particularly to a scribing apparatus suitable for scribing thin glass.

  As the liquid crystal display panel becomes thinner, smaller, and lighter, the thickness of the glass used is becoming very thin. In addition to liquid crystal display panels, glass used for touch panels and the like is required to be bent and deformed, and a glass having a thickness of 0.1 to 0.2 mm has been used.

When the glass is scribed, glass chips are generated. In particular, if the amount of cutting (depth of cutting) is too deep, the amount of chips increases, or chips having a shape like a piece of elongated glass are generated. In addition, cracks in unintended directions may occur.
The generated chips and glass fragments enter the gap between the cutter heads where the cutter is installed and accumulate, causing various problems such as accelerating the wear of the cutter and preventing the cutter head from moving normally. It is a cause.
In addition, if the depth of cut is too shallow, there is a problem that the scribe line becomes intermittent.

  Various scribing apparatuses that solve the chip problem are proposed. For example, the scribing apparatus disclosed in Patent Document 1 listed below is one example.

  The configuration of the scribing device disclosed in Patent Document 1 is configured such that air is blown from two directions to blow glass chips as shown in FIG. One direction of air is blown from an air blow pipe 17 disposed outside from the advancing direction of the (cutter) blade 8, and the other direction of air is blown from the head body of the scribe head 1 that transmits the pressing force of the air cylinder 14. The air blow passage 12 is provided in the head shaft 3 of the bearing 4 provided in 2, and the blade is blown from the air blow opening of the holder toward the moving direction side of the blade through the air blow passage 12.

Japanese Patent Publication No. 2005-82413

The scribing device of Patent Document 1 solves the problem of chips by blowing glass chips with air.
However, the amount of chips generated and the shape of chips are affected by the depth of scribing. Therefore, it is required to reduce the generation amount of chips as much as possible and to set an appropriate cutting amount that does not cause cracks.

The amount of scribing is closely related to the pressing force applied to the glass surface. When the pressing force is large, the cutting depth becomes deep, while when the pressing force is small, the cutting depth becomes shallow.
Further, the pressing force needs to be adjusted according to the thickness of the glass. If the glass plate thickness is thick, the pressing force needs to be increased, and if the glass plate thickness is thin, the pressing force needs to be reduced.
For example, when scribing thick glass of 1 mm or more, a pressing force of 1 kgf or more is required, but in the case of thin glass of 0.2 mm or less, a pressing force of around 200 gf is preferred.

In the configuration shown in Patent Document 1, the pressing force applied to the surface of the glass plate is the pressing force of the air cylinder 14, the own weight of the cylinder bearing member 16, the own weight of the head body 2, the own weight of the holder base 5, and the holder 7. The dead weight is added to act as a pressing force. Since materials such as the cylinder bearing member 16, the head main body 2, the holder base 5, and the holder 7 are required to be rigid, iron-based materials are often used. Further, the size of the shape of the component parts is also limited. For this reason, the total weight of these materials increases, and a pressing force of several hundred gf is applied even at least for the material. Furthermore, the pressing force of the air cylinder is added to this pressing force.
For this reason, the configuration of the scribing device disclosed in Patent Document 1 is not suitable for scribing thin glass that must be scribed with a pressing force of about 200 gf, and cracks are generated even if the problem of chips is solved. The problem remains.

  Further, since the pressing force of the air cylinder has a use range depending on the type, it is necessary to select and use the type in order to obtain a desired pressing force. That is, it is difficult to control with a single air cylinder for glass ranging from a thin plate to a thick plate, and it is necessary to replace the air cylinder according to the thickness of the glass to be scribed.

  Furthermore, in the configuration of Patent Document 1, the head shaft 3 is rotatably supported by the bearing 4, the holder base 5 is fixed to the head shaft 3, and the holder 8 is attached with the blade 8. 7 is fixed. In other words, the blade 8 is also freely rotated by the rotation of the head shaft 3.

However, in such a configuration, when an abnormal external force is applied due to vibration or the like during scribing, the guide shaft rotates and affects the normal movement of the blade 8.
Further, it is conceivable that the center of gravity balance of the holder base 5 affects the rotation of the holder 7. That is, if the center of gravity of the holder base 5 deviates from the axis of the head shaft 3, the head shaft 3 and the holder 7 are biased due to the weight of the holder base 5, and the blade 8 follows. The problem of worsening the nature occurs.

  The present invention has been made in view of the above problems, and an object of the present invention is to obtain a scribing apparatus suitable for scribing thin glass and to obtain a stable scribing quality.

  As a means for solving the problem, the scribing apparatus according to claim 1 of the present invention is characterized in that the scribing unit moves in parallel with the glass plate placed on the table and in the X-axis direction of the glass plate. 1 moving device, a second moving device that moves the scribe unit in the Y-axis direction of the glass plate, and a third moving device that moves the scribe unit in the Z-axis direction perpendicular to the glass plate. In the scribing device for scribing the glass plate while applying a constant pressing force with a cutter attached to the cutter head of the scribing unit, the scribing unit is attached to a lifting bracket of the third moving device and is pressurized Means, a ball spline mounting unit provided in the ball spline with the ball spline disposed directly below the pressurizing means, Cutter head mounting unit provided directly connected to the ball spline shaft of the spline, the cutter head mounted with the cutter, and a pressure reducing means provided in the ball spline mounting unit for reducing the pressing force applied to the glass plate It is characterized by having these.

The configuration of the scribe unit of the present invention is such that a ball spline mounting unit is provided directly below the pressurizing means, and the pressure (pressing force) of the pressurizing means is directly provided in the ball spline mounting unit. To act on. As a result, the ball spline shaft is only subjected to the pressing force of the pressing means, and the ball spline shaft moves with the pressing force set by the pressing means.
Further, the cutter head mounting unit is directly connected to the ball spline shaft so that the pressing force of the pressurizing means directly reaches the cutter head mounting unit. As a result, the cutter head mounting unit acts only with the pressure applied from the ball spline shaft. That is, the applied pressure applied to the cutter head mounting unit can be minimized because no other external pressure is applied.
Furthermore, a rolling bearing which is a ball spline is adopted. By using a shaft (ball spline shaft) that linearly moves under a low frictional resistance, the sliding frictional resistance of the shaft is kept small.

  Furthermore, by providing a pressing force reducing means, when the pressing force is large, the pressing force can be lowered by the reducing means to obtain a required pressing force. Thereby, the effect which can be scribed with a required pressing force from a thin plate to a thick plate glass is obtained.

  The scribing apparatus according to claim 2 of the present invention is characterized in that the pressurizing means comprises an air cylinder having a sliding frictional resistance of 50 gf or less.

  When the sliding friction resistance is 50 gf or less, the variation in the pressing force is reduced, the depth of cut into the glass surface is constant and stable, and a very stable scribe quality is obtained. If this is larger than 50 gf, the variation in the pressing force increases, the variation in the cutting depth of the glass surface increases, and the scribe quality deteriorates.

  The scribing apparatus according to claim 3 of the present invention is characterized in that the ball spline shaft is disposed on substantially the same axis as a cylinder shaft of an air cylinder as the pressurizing means. is there.

  By disposing the ball spline shaft of the ball spline on substantially the same axis as the cylinder shaft of the air cylinder, a uniform force without separation is applied to the shaft surface of the ball spline shaft. For this reason, the ball spline shaft moves with the minimum frictional resistance without increasing the sliding frictional resistance.

  The scribing apparatus according to a fourth aspect of the present invention is characterized in that the decompression means comprises a device that lifts the ball spline shaft upward and is provided with a weight.

  If a mechanism that lifts the ball spline shaft upward using a weight is used, resistance to the pressing force is generated and the pressing force is reduced. Since a pressure reducing device having a simple structure using only a weight can be formed, it can be formed at low cost.

  The scribing apparatus according to claim 5 of the present invention is characterized in that the decompression means includes a support plate attached to the ball spline attachment unit, a lever attached to the support plate so as to be rotatable, and one end of the lever. A weight attached to the side, a lifting member attached to the other end of the lever, and a lifting arm engaged with the lifting member with a gap and attached to the ball spline shaft. is there.

  With the above configuration, one end of the lever to which the weight is attached is lowered, and the elevating member attached to the other end of the lever is raised upward. At the same time, the elevating arm is raised and the ball spline shaft is lifted upward. It is a structure that uses the principle of lever, and the number of components is small, so it can be reduced in cost.

  The scribing apparatus according to claim 6 of the present invention is characterized in that the decompression means can adjust the decompression force.

A desired pressing force can be obtained by adjusting the decompression force. As described above, since the operating pressure range of the air cylinder is determined, it is necessary to select an air cylinder suitable for obtaining a predetermined pressing force. However, if the decompression force can be adjusted, a pressing force in a considerably wide range can be obtained with one air cylinder.
In other words, depending on the thickness of the glass, the air cylinder that must be replaced can be accommodated by adjusting the decompression force without replacement.
Moreover, a desired pressing amount can be obtained by adjusting the decompression force, the scribe quality can be improved, and a stable scribe quality can be obtained.

  The scribing apparatus according to claim 7 of the present invention is characterized in that the adjustment of the decompression force by the decompression means is performed by changing the weight of the weight.

  As a method of adjusting the decompression force by the weight of the weight, a plurality of weights may be prepared for each weight, and a weight having a required weight may be used. The weight can be easily exchanged and the cost can be reduced.

  As described above, the actions and effects of each claimed invention have been described in detail. In summary, the scribing apparatus of the present invention can easily scribe thin glass and can obtain a stable scribing quality. Further, the number of air cylinders used for each type can be minimized, and a scribe device can be manufactured at a low cost.

  Next, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described with reference to FIGS. 1 is a front view of the scribing apparatus according to the embodiment of the present invention, FIG. 2 is a plan view of the scribing apparatus in FIG. 1, and FIG. 3 is a side view of the third moving apparatus and scribing unit in FIG. Yes. 4 is a cross-sectional view of main parts of the ball spline mounting unit in FIG. 3, FIG. 5 is a cross-sectional view of main parts of the cutter head mounting unit and the cutter head in FIG. 3, and FIG. 6 is a front view and a side view of the decompression device in FIG. 6A is a front view, and FIG. 6B is a side view as viewed from the direction A in FIG. 6A.

1 and 2, a table 21 is provided on a base 20, and a glass plate 22 is placed on the table 21 and scribed with a cutter provided in a scribe unit 50.
The scribing unit 50 is a device that applies a pressing force to the surface of the glass plate 22. This scribing unit 50 is disposed on the lifting bracket 46 of the third moving device 40, and is indicated by an X- It moves in the X direction (hereinafter referred to as the X-axis direction (see FIG. 1)) and the Y-Y direction (hereinafter referred to as the Y-axis direction (see FIG. 2)). The X-axis direction and the Y-axis direction move in parallel with the surface of the glass plate 22.
Further, the scribe unit 50 also moves in the ZZ direction (hereinafter referred to as the Z-axis direction (see FIG. 1)) that is perpendicular to the surface of the glass plate 22.

  The movement in the X-axis direction is performed by the first moving device 30. The movement in the Y-axis direction is performed by the second moving device 25, and the movement in the Z-axis direction is performed by the third moving device 40.

Here, each mobile device will be briefly described.
First, the second moving device 25 that moves in the Y-axis direction includes two legs 26 protruding from the left and right grooves 23 (see FIG. 2) of the base 20 and a base 20 that is not shown. The servo motor and the ball screw arranged inside, and the engaging member that engages with the servo motor and the ball screw are used as the main components.
A first moving device 30 is provided above the protruding left and right legs 26, and when the servo motor rotates, the left and right legs move simultaneously in the same direction (Y-axis direction). Along with that, the first moving device 30 provided on the two legs 26 also moves in the Y-axis direction.

Next, the first moving device 30 includes attachment members 32a and 32b provided on the upper portions of the left and right two legs 26, a servo motor provided on the attachment members 32a and 32b, a ball screw 34, and the legs 26. It is composed of a rail 35, a bracket 36, and the like provided at the top. The bracket 36 is provided with a plurality of engaging members that engage with the ball screw 34 and the rail 35, and the first moving device 30 is configured including these members.
A third moving device 40 is attached to the bracket 36, and the bracket 36 moves in the X-axis direction by the rotation of the motor 33, and the third moving device 40 also moves in the X-axis direction along with it.

Next, the 3rd moving device 40 is provided in the bracket 36 of the 1st moving device, as shown in FIG.
The third moving device 40 includes a motor 43 composed of a servo motor, a mounting base 42 to which the motor 43 is attached, a ball screw 44 connected to the motor 43, a support base 41 and a support plate 45 that support the ball screw 44, and rotation of the ball screw 44. The vertical bracket 46 that moves up and down, a slide base 47 and a slider 48 for smoothly moving the vertical bracket 46 at a normal position, and a stopper 49 are used as main components.

  The slide base 47 is fixed to the bracket 36, and the slider 48 that engages and slides on the slide base 47 is fixed to the lifting bracket 46. As for the engagement between the slide base 47 and the slider 48, the projection provided on the slider 48 engages with the V groove provided on the slide base 47 so that smooth sliding is performed.

  The support base 41 and the support plate 45 that support the ball screw 44 are fixed to the bracket 36 and the support plate 45 is fixed to the lifting bracket 46, and both positions from the bracket 36 are at the same distance. ing. The lifting bracket 46 is moved up and down by the rotation of the ball screw 44 supported by the support base 41 and the support plate 45.

  The stopper 49 is provided to control the lower limit of the cutter 57b of the scribe unit 50 described later. That is, the cutter 57b is provided to prevent the glass plate 22 from being abnormally pressed by being lowered more than a specified level. The stopper 49 is provided with an electrode 49b and is in contact with the electrode 56a2 of the stopper 56a provided in the scribe unit 50.

  The elevating bracket 46 of the third moving device 40 is provided with a scribe unit 50. The third moving device 40 moves in the Z-axis direction, that is, in the direction perpendicular to the glass plate. Then, as the third moving device 40 moves in the Z-axis direction, the scribe unit 50 also moves in the Z-axis direction.

Next, as shown in FIG. 3, the scribe unit 50 includes a mounting base 52 fixed to the lifting bracket 46 of the third moving device 40, an air cylinder 53 provided on the mounting base 52, A ball spline attachment unit 54 provided directly below, a cutter head attachment unit 56 directly connected to the ball spline shaft 54b1 of the ball spline attachment unit 54, a cutter head 57 provided on the cutter head attachment unit 56, and a pressure reducing device 55 is doing.
The ball spline mounting unit 54 is fixed to the lifting bracket 46 of the third moving device 40, and a ball spline is provided therein. The cutter head 57 provided in the cutter head mounting unit 56 is detachably provided, and the cutter head 57 is rotatable.
Hereinafter, the specifications of each component unit will be described.

The air cylinder 53 is provided as a pressurizing means for applying a pressing force to the surface of the glass plate 22. The air cylinder 53 is an air cylinder having a sliding frictional resistance of 50 gf or less.
Here, when the one having a sliding friction resistance of 50 gf or less is used, the variation in the pressing force on the glass surface is reduced, the scribe cutting depth becomes constant, and the scribe quality is stabilized. Further, when the sliding friction resistance is larger than 50 gf, the variation in the pressing force is increased, and the variation in the cutting depth is increased accordingly, and the scribe quality is deteriorated.
Examples of the air cylinder having a sliding friction resistance of 50 gf or less include an MQP type low friction cylinder manufactured by SMC Corporation.

As shown in FIG. 4, the ball spline mounting unit 54 is constituted by a ball spline 54b provided in the mounting member 54a.
The ball spline 54b is composed of a ball spline shaft 54b1, a ball 54b2, and a sleeve 54b3, and the ball spline shaft 54b1 moves freely only in the axial direction under a low frictional resistance. In this embodiment, since a sliding resistance of 10 gf or less is used, the sliding friction resistance is small, and the variation of the sliding friction resistance is very small.
The sliding resistance indicates a resistance force that is generated when the ball spline shaft 54b1 starts to move from a stationary state when the ball spline shaft 54b1 is moved in the movable direction (vertical direction).

The ball spline 54b is inserted into a hole provided in the mounting member 54a and engaged with the hole. The hole is a hole for sliding assignment, and after the ball spline 54b is engaged, it is slid with a screw (bolt) 54c. The split portion is tightened so that the ball spline 54b is firmly engaged with the hole.
Further, the attachment member 54 a is firmly fixed to the lifting bracket 46 of the third moving device 40.

The upper end of the ball spline shaft 54b1 protrudes to the lower end of the cylinder shaft 53b of the air cylinder 53, and the upper end of the ball spline shaft 54b1 is always in contact with the lower end of the cylinder shaft 53b.
The lower end of the ball spline shaft 54b1 is directly connected to the cutter head mounting unit 56.

In the present embodiment, the ball spline shaft 54b1 and the cylinder shaft 53b are disposed on substantially the same axis. By arranging them on the same axis, the pressing force applied from the cylinder shaft 53 is uniformly applied to the axial surface of the ball spline shaft 54b1. For this reason, since a biasing force is not applied to the sliding surfaces of the ball spline shaft 54b1 and the ball 54b2, the sliding frictional resistance of the ball spline shaft 54b1 is minimized without increasing.
When a pressing force is applied to the ball spline shaft 54b1 at a position deviated from the same axis, a biased force is applied to the sliding surfaces of the ball spline shaft 54b1 and the ball 54b2, and the sliding friction resistance increases.
Note that the cylinder shaft 53b of the air cylinder 53 and the ball spline shaft 54b1 of the ball spline 54b are not necessarily arranged on the same axis depending on the manufacturing accuracy and assembly accuracy of components. On the substantially same axis line is defined as including these errors.

As shown in FIG. 5, the cutter head mounting unit 56 includes a stopper 56a and a head mounting member 56b.
The stopper 56a is provided to regulate the descending amount of the cutter 57b. The stopper 56a is formed by providing an electrode 56a2 on the stopper plate 56a1, and is firmly engaged with the ball spline shaft 54b1 by a press-fitting method.
The electrode 56a2 of the stopper 56a is in contact with the electrode 49b of the stopper 49 of the third moving device so that an electric signal flows.

  The head mounting member 56b is provided for mounting the cutter head 57, and is firmly engaged with the ball spline shaft 54b1. A cutter head 57 is attached to the head attachment member 56b.

  The cutter head 57 includes a cutter attachment member 57a and a cutter 57b. The cutter mounting member 57a includes a bearing mounting member 57a1 for disposing the bearing 57a2, a bearing 57a2, a holder 57a3 engaged with the bearing, a pin 57a4 for disposing the sliding member 57a5, and a sliding member 57a5. And a pin 57a6 for attaching the cutter 57b to the sliding member 57a5.

  Here, the holder 57a3 is press-fitted into the inner ring of the bearing 57a2 and fixed to the bearing 57a2, and the outer ring of the bearing 57a2 is press-fitted into the bearing mounting member 57a1 and fixed to the bearing mounting member 57a1. Accordingly, the holder 57a3 is rotatably supported by the bearing 57a2.

  The bearing attachment member 57a1 is attached in a static state to a recess provided in the head attachment member 56b of the cutter head attachment unit 56, and is fixed by a set screw or the like (not shown). Therefore, the cutter head 57 can be freely detached from the cutter head mounting unit 56 by loosening the set screw and removing the bearing mounting member 57a1 from the head mounting member 56b.

The sliding member 57a5 has a plate-like shape and is provided with a slit on the tip side, and a cutter 57b is rotatably attached to the slit portion via a pin 57a6. The sliding member 57a5 is rotatably attached to the holder 57a3 via a pin 57a4. As a result, the sliding member 57a5 provided with the cutter 57b moves from the central axis E in the directions F and F ′ indicated by arrows.
That is, when the cutter head 57 moves in the right direction in the figure, the cutter 57b moves in the F direction by frictional resistance with the glass plate 22 to scribe the glass plate 22. Conversely, when the cutter head 57 moves in the left direction in the figure, the cutter 57b moves in the F ′ direction due to frictional resistance with the glass plate 22 to scribe the glass plate 22.

Next, the decompression device 55 shown in FIG. 6 is a device provided as a means for reducing and reducing the pressing force when the pressing force on the surface of the glass plate 22 is large.
The decompression device 55 includes a support plate 55a that is attached to the ball spline attachment unit 54 and supports the lever 55c, a lever 55c that is rotatably provided on the support plate 55a via a stop pin 55f, and one end of the lever 55c. A weight 55b provided on the side, an elevating member 55e provided on the other end side of the lever 55c, and an elevating arm 55d attached to the ball spline shaft 54b1 of the ball spline attachment unit 54 and engaged with the elevating member 55e with a gap. It is composed.

  In this embodiment, the weight 55b is fixedly attached to the lever 55c via a hole, a screw and a nut provided on the end side of the lever 55c. The elevating member 55e is composed of a pin provided with a miniature bearing at the tip, and is fixed to the other end side of the lever 55c by a press-fitting method. The miniature bearing provided at the tip of the pin engages with a gap in the groove of the lifting arm 55d attached to the ball spline shaft 54b1.

  When the weight 55b is attached to one end side of the lever 55c, the one end side of the lever 55c is lowered. Then, the lifting member 55e on the other end side of the lever 55c is lifted. At the same time, the lifting arm 55d engaged with the lifting member 55e is lifted, and the ball spline shaft 54b1 is also lifted upward.

As a result, a drag force acting from the weight 55b acts on the pressing force applied from the air cylinder 53 to the ball spline shaft 54b1, and the pressing force is reduced and reduced by the drag force.
Therefore, various weights having different weights are prepared, and a desired pressing force can be obtained by attaching a weight having a weight to be reduced. Further, the pressing force can be freely adjusted by changing the weight of the weight.

In a state where pressure is not reduced, the pressing force applied to the surface of the glass plate 22 through the cutter 57b includes the pressing force applied from the air cylinder 53, the weight of the ball spline shaft 54b1, and the sliding resistance of the ball spline shaft 54b1. The sum of the weight of the cutter head mounting unit 56 and the weight of the cutter head 57 is applied to the surface of the glass plate 22 as a pressing force.
Since the ball spline shaft 54b1, the cutter head mounting unit 56, and the cutter head 57 require rigidity, in this embodiment, they are mainly formed of an iron-based material. Moreover, the size of the shape of these components is also formed in a balanced size that does not hinder the device.
Therefore, even if a ball spline shaft 54b1 having a very small sliding resistance is used, the pressing force resulting from the weight of the ball spline shaft 54b1, the weight of the cutter head mounting unit 56, the weight of the cutter head 57, etc. is about When the pressing force of the air cylinder 53 is applied, the pressing force becomes approximately 400 gf.

On the other hand, a desirable pressing force for scribing a glass plate 22 having a thickness of 0.2 mm is said to be about 200 gf.
Therefore, a pressing force of 200 gf can be obtained by using a weight that reduces pressure by 200 gf.

As described above, a desired pressing force can be obtained by providing the scribe unit with the pressure reducing device having the above-described configuration. In particular, a low pressing force is required in the scribing of thin glass. A desired low pressing force can be obtained with the decompression device, and the occurrence of cracks and the occurrence of elongated glass fragments can be prevented. Further, generation of glass chips can be minimized, and good and stable scribe quality can be obtained.
Moreover, the optimum value of the pressing force in scribing varies depending on the thickness and hardness of the glass. That is, it is necessary to appropriately change the pressing force at the time of scribing depending on the components blended in the glass and the treatment applied to the glass surface even with the same plate thickness. Here, in order to avoid the complexity of explanation, the condition that “the pressing force when scribing a glass with a thickness of 0.2 mm is 200 gf” is given as an example when the load during scribing is small. Depending on the component and the surface treatment, it is not limited to this.

  Moreover, since the decompression device has a very simple structure using the lever principle using a weight, the cost can be reduced.

In this embodiment, an air cylinder having a sliding friction resistance of 50 gf or less is used. Also, a very small ball spline having a sliding resistance of 10 gf or less is used.
Preferably, a cylinder having a sliding friction resistance of 30 gf or less is used, more preferably, a cylinder having a sliding friction resistance of 30 gf or less and a ball spline having a sliding resistance of 10 gf or less are used in combination. A configuration in which the total sliding frictional resistance up to is 50 gf or less is used.
Thus, by using a device having a very small sliding frictional resistance, the variation in the pressing force becomes very small, and a constant and stable pressing force can always be obtained. This also has the effect of stabilizing the scribe quality.

  In the present embodiment, the cylinder shaft of the air cylinder and the ball spline shaft of the ball spline are arranged on the same axis. By arranging them on the same axis, the pressing force applied from the cylinder shaft is uniformly applied to the axial surface of the ball spline shaft. That is, since no biasing force is applied to the sliding surface of the ball spline shaft, the sliding frictional resistance of the ball spline does not increase.

In this embodiment, a ball spline is used to transmit the pressing force of the air cylinder. The ball spline moves in the axial direction without the ball spline shaft rotating around the axis. For this reason, even if an abnormal force due to vibration or the like is applied, the ball spline shaft is applied with the pressing force of the air cylinder and does not rotate, so the influence on the followability of the cutter can be kept small.
In the above-described prior art, the cutter is structured to be connected to a head shaft that is rotatably provided on the head body. Under this structure, the head shaft rotates when an abnormal force due to vibration or the like is applied. And the danger that a cutter follows according to the rotation arises. In other words, abnormal force due to vibration or the like affects the followability of the cutter.

  In the present embodiment, the air cylinder is used as the pressurizing unit, but the pressurizing unit is not limited to the air cylinder. For example, when the applied pressure is constant and there is almost no need for adjustment, there is no problem even if a weight is used as the pressing means as an extreme example.

  Further, in the present embodiment, the decompression unit is configured by a decompression device using a weight, but is not necessarily limited to the configuration device of the present embodiment, and may be another configuration device. Moreover, you may be the decompression means using things other than a weight.

  Next, the method of adjusting the decompression force by the decompression means described above is an adjustment method performed by changing the weight of the weight. In this method, several types of weights having different weights are prepared, and the decompression force is adjusted by changing the weights having different weights.

  Other adjustment methods are possible for adjusting the decompression force. Hereinafter, another adjustment method in the decompression device 55 will be described with reference to FIG. FIG. 7A shows an explanatory diagram for adjusting the decompression force by changing the attachment position of the weight, and FIG. 7B shows an explanatory diagram for adjusting the decompression force by changing the attachment position of the weight and the weight of the weight. ing.

In FIG. 7A, the lever 55c is provided with a plurality of weight mounting holes 55c1, 55c2, 55c3, and 55c4. With the mounting position O of the lever 55c rotatably attached to the support plate 55a via the stop pin 55f as the base point, the distances of the mounting holes 55c1, 55c2, 55c3 from the base point O are l1, l2, l3,. Then, even if the weight 55b having the same weight is used, the acting force varies depending on the position of the hole for attaching the weight 55b. This is because the weight of the lever 55c is affected, and the weight of the lever 55c increases as the mounting distance from the base point O becomes longer, and the weight of the weight 55b is added thereto. When the weight 55b is attached to the lever 55c, the lever 55c on the weight 55b attachment side is lowered. And the raising / lowering member 55e in the other side raises.
As the mounting position of the weight 55b becomes farther from the base point O, the descending amount increases, and at the same time, the ascending member 55e increases. Then, as the lifting amount of the elevating member 55e increases, the lifting amount of the ball spline shaft 54b1 also increases, and the decompression force increases.

  In order to adjust the decompression force only by the weight of the weight, it is necessary to prepare several kinds of weights having different weights. However, if an adjustment method for changing the attachment position of the weight is taken, the types of weights to be prepared can be reduced.

  The adjustment method shown in FIG. 7B is an adjustment method using two types of weights and different mounting positions. A weight 55b1 is attached to the attachment hole 55c1, and a weight 55b2 is attached to the attachment hole 55c3. The weights 55b1 and 55b2 may have different weights.

  Thus, when the adjustment method combining both the weight of the weight and the attachment position is adopted, the adjustment range of the decompression force can be expanded to each stage.

  The scribing device of the present invention is the most suitable device for scribing thin glass that requires a small pressing force. However, it can also be applied to scribing thick glass that requires a large pressing force. Although it is necessary to select a suitable air cylinder according to the required pressing force, the scribing device of the present invention can adjust the decompression force to obtain a desired pressing force. Can be reduced.

1 is a front view of a scribing apparatus according to an embodiment of the present invention. It is a top view of the scribing apparatus in FIG. It is a side view of the 3rd moving apparatus and scribe unit in FIG. It is principal part sectional drawing of the ball spline attachment unit in FIG. It is principal part sectional drawing of the cutter head attachment unit in FIG. 3, and a cutter head. 6A and 6B are a front view and a side view of the decompression device in FIG. 3, in which FIG. 6A is a front view, and FIG. 6B is a side view seen from the direction A in FIG. FIG. 7A is an explanatory diagram for explaining another method for adjusting the decompression force, FIG. 7A is an explanatory diagram for adjusting the decompression force by changing the attachment position of the weight, and FIG. It is explanatory drawing which adjusts decompression force by changing the weight of a weight. It is principal part sectional drawing of the scribing apparatus shown by patent document 1. FIG.

Explanation of symbols

20 Base 21 Table 22 Glass plate 23 Groove 25 Second moving device 26 Leg 30 First moving device 32a, 32b, 54a Mounting member 33, 43 Motor 34 Ball screw 35 Rail 36 Bracket 40 Third moving device 41 Support base 42, 52 Mounting base 45, 55a Support plate 46 Lift bracket 47 Slide base 48 Slider 49, 56a Stopper 49b, 56a2 Electrode 50 Scribe unit 53 Air cylinder 53b Cylinder shaft 54 Ball spline mounting unit 54b Ball spline 54b1 Ball spline shaft 54b2 Ball 54b3 Sleeve 55 Pressure reducing device 55b, 55b1, 55b2 Weight 55c Lever 55c1, 55c2, 55c3, 55c4 Mounting hole 55d Lifting arm 55f Stopping pin 55e Lifting member 56 Cutter head Mounting unit 56a1 Stopper plate 56b Head mounting member 57 Cutter head 57a Cutter mounting member 57a1 Bearing mounting member 57a2 Bearing 57a3 Holder 57a4, 57a6 Pin 57a5 Sliding member 57b Cutter 60 Scribing device

Claims (7)

A first moving device that moves the scribe unit in the X-axis direction of the glass plate in parallel with the glass plate placed on the table, and a second moving device that moves the scribe unit in the Y-axis direction of the glass plate And a third moving device that moves the scribe unit in the Z-axis direction perpendicular to the glass plate, and scribes the glass plate while applying a constant pressing force with a cutter attached to the cutter head of the scribe unit. In the scribing device to
The scribing unit is attached to a lifting bracket of the third moving device, and includes a pressurizing unit, a ball spline mounting unit provided inside the pressurizing unit with a ball spline installed therein, A cutter head mounting unit provided directly connected to a ball spline shaft, the cutter head to which the cutter is attached, a pressure reducing means for reducing pressure applied to the glass plate provided in the ball spline mounting unit; A scribing device comprising:   2. The scribing apparatus according to claim 1, wherein the pressurizing means comprises an air cylinder having a sliding frictional resistance of 50 gf or less.   The scribing device according to claim 1 or 2, wherein the ball spline shaft is disposed on substantially the same axis as a cylinder shaft of an air cylinder as the pressurizing means.   2. The scribing apparatus according to claim 1, wherein the pressure reducing means is composed of a device that lifts the ball spline shaft upward and is provided with a weight.   The decompression means includes a support plate attached to the ball spline attachment unit, a lever rotatably attached to the support plate, a weight attached to one end of the lever, and attached to the other end of the lever. The scribing device according to claim 1, comprising: a lift member to be mounted, and a lift arm that is engaged with the lift member with a gap and attached to the ball spline shaft.   The scribing device according to claim 1, wherein the decompression unit can adjust a decompression force. The scribing device according to any one of claims 1 to 4, wherein adjustment of the decompression force by the decompression means is performed by changing a weight of the weight.

Images