JP2017014027A - Glass tube cutting method, and glass tube positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass tube cutting method capable of enhancing the precision of the cut surface of a glass tube, and a positioning device for a glass tube.SOLUTION: A cutting method of a glass tube G positions the glass tube G transported horizontally in a tube axis direction, and brings a blade member B into contact with the glass tube G from above the positioned glass tube G thereby to cut the glass tube G. In the glass tube G cutting method, at the positioning of the glass tube G, there are used a first regulation member 14a and a first bearing member 14b, for example. The first regulation member 14a regulates the upward movement of the glass tube G. The first bearing member 14b is made so vertically movable as to support the glass tube G from below, and as to bring the glass tube G into contact with the first regulation member 14a. The positioning device 11 of the glass tube G is equipped with the first regulation member 14a and the first bearing member 14b, for example.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a glass tube cutting method and a glass tube positioning apparatus.

  Conventionally, a glass tube that cuts a glass tube based on the scratches is formed on the glass tube by bringing a blade member into contact with the glass tube from above the glass tube conveyed horizontally in the tube axis direction. A cutting method is known (see Patent Documents 1 and 2).

JP 2009-132580 A JP 2009-132581 A

  As shown to Fig.3 (a), the glass tube G conveyed horizontally to a tube-axis direction uses the roller R2 which contacts the roller R1 which contacts the upper end of the glass tube G, and the lower end of the glass tube G, for example. Thus, the vertical movement of the glass tube G can be suppressed. The blade member B that forms a cutting flaw from above the conveyed glass tube G is driven to make a cutting flaw at a predetermined interval in the tube axis direction of the glass tube G. Further, the blade member B is set so that the tip position when the glass tube G is scratched for cutting is a predetermined position. The tip position of the blade member B is a cut surface that is substantially orthogonal to the tube axis direction of the glass tube G, as schematically shown in FIG. It is adjusted so that C1 is formed.

  However, even if the glass tube G having the same reference dimension is cut based on the scratch for cutting, it is compared with the surface perpendicular to the tube axis direction of the glass tube G as schematically shown in FIG. In some cases, a cut surface C2 that is significantly inclined is formed. If the accuracy of the cut surface of the glass tube G is lowered like the cut surface C2, for example, glass fragments are scattered around and the yield of the glass tube G is reduced.

  This invention is made | formed in view of such a situation, The objective is to provide the cutting method of a glass tube and the positioning device of a glass tube which can raise the precision of the cut surface of a glass tube easily. .

This invention is made | formed by discovering that the change of a contact state with the glass tube and blade member conveyed horizontally to a tube-axis direction causes the precision fall of the cut surface of a glass tube.
A method of cutting a glass tube that solves the above-described problem is to position a glass tube that is transported horizontally in the tube axis direction, and to cut the glass tube by contacting a blade member from above the positioned glass tube A method of cutting a glass tube, wherein a restriction member for restricting the upward movement of the glass tube in positioning the glass tube, and supporting the glass tube from below and bringing the glass tube into contact with the restriction member Thus, a support member that can move up and down is used.

  According to this method, the lower end position of the glass tube is adjusted by the support member, and the upper end position of the glass tube is positioned by the regulating member. For example, the glass tube has a different outer diameter within a dimensional tolerance. The upper end position of the glass tube can be similarly positioned. For example, even if the glass tube vibrates, the upward movement of the glass tube is regulated by the regulating member. Thereby, since the upper end position of a glass tube is stabilized, the contact pressure of the blade member which contacts a glass tube from upper direction becomes easy to be stabilized.

In the glass tube cutting method, it is preferable to use a roller as the regulating member and the support member.
According to this method, it is possible to prevent the regulating member and the support member from rubbing against the glass tube.

In the glass tube cutting method, it is preferable that the regulating member is used at each of a first position and a second position downstream of the first position in the conveyance path of the glass tube.
According to this method, it is possible to increase the positioning accuracy of the upper end of the glass tube.

In the method for cutting a glass tube, it is preferable that the regulating member has a contact surface that comes into contact with an upper end of the glass tube.
According to this method, since the upper end of the glass tube is directly positioned, the positioning accuracy of the upper end of the glass tube can be increased.

In the method for cutting a glass tube, it is preferable that the restriction member and the support member include a set arranged at positions facing each other vertically with the glass tube interposed therebetween.
According to this method, for example, vertical vibrations of the glass tube can be suitably suppressed.

  A glass tube positioning device that solves the above problems is a glass tube positioning device for positioning a glass tube that is conveyed toward a cutting device, and the cutting device is horizontally conveyed in the tube axis direction. A device that cuts the glass tube by bringing a blade member into contact with the glass tube from above the glass tube, and the positioning device includes a positioning unit that positions the glass tube conveyed horizontally in the tube axis direction. The positioning portion is a regulating member that regulates the upward movement of the glass tube, and a support member that can move up and down so as to support the glass tube from below and bring the glass tube into contact with the regulating member, Is provided.

  According to the present invention, the accuracy of the cut surface of the glass tube can be easily increased.

It is a schematic side view showing a glass tube cutting method and a glass tube positioning device in an embodiment. (A) is a schematic sectional drawing which shows a positioning part, (b) is a schematic sectional drawing which shows the example of a change of a positioning part. (A) is explanatory drawing which shows the cutting method of the glass tube of a prior art example, (b) And (c) is a side view which shows typically the cut part of a glass tube.

  Hereinafter, embodiments of a glass tube cutting method and a glass tube positioning device will be described with reference to the drawings. Note that in the drawings, some of the components may be exaggerated for convenience of explanation. Further, the dimensional ratio of each part may be different from the actual one. Further, the upper and lower sides of the drawing correspond to the upper and lower sides used in the description of the positional relationship.

<Overall configuration of equipment>
First, the overall configuration of equipment in which a glass tube positioning device is installed will be described.
As shown in FIG. 1, the glass tube G positioning device 11 of this embodiment is disposed between a tube drawing device 12 and a glass tube G cutting device 13, and is conveyed to the cutting device 13. Is used for positioning.

  The tube drawing device 12 is a device that pulls the glass tube G from a molding machine that forms the glass tube G from molten glass and continuously sends the glass tube G downstream. In the molding machine, for example, the glass tube G is formed from molten glass using the Danner method or the down draw method (bellow method).

  The cutting device 13 is a device that cuts the glass tube G based on bringing the blade member B into contact with the glass tube G from above the glass tube G conveyed horizontally in the tube axis direction (length direction). More specifically, the cutting device 13 forms a scratch for cutting on the glass tube G by bringing the blade member B into contact with the glass tube G from above, and cuts the glass tube G by applying an external force to the scratch. It is configured. The blade member B is configured so that, for example, a position that contacts the glass tube G and a position that is separated from the glass tube G are switched at a predetermined timing by using the period of the rotation shaft. Thereby, it is possible to form scratches on the glass tube G at predetermined intervals in the tube axis direction. The cutting device 13 includes an external force application mechanism that applies an external force to the cutting wound. As an external force application mechanism, for example, a breaking mechanism that breaks the glass tube G using a flaw for cutting, and a cleaving mechanism that cleaves the glass tube G by applying a thermal shock to the flaw for cutting the glass tube G Is mentioned.

<Positioning device 11>
Next, the positioning device 11 will be described. The positioning device 11 includes a first positioning unit 14 and a second positioning unit 15 that position a glass tube G that is transported horizontally in the tube axis direction.

  The first positioning portion 14 includes a first regulating member 14a and a first support member 14b. The first restricting member 14a is provided above the first support member 14b and restricts the upward movement of the glass tube G. The vertical position of the first regulating member 14a is fixed at a predetermined height position. The first restricting member 14a is provided so as to be retractable upward when an excessive force different from the normal conveyance of the glass tube G is applied to the first restricting member 14a due to, for example, a malfunction of the equipment or the like. In order to correspond to the glass tube G, the vertical position can be provided to be changeable.

The first support member 14b is configured to be vertically movable so as to support the glass tube G from below and to bring the glass tube G into contact with the first regulating member 14a.
Examples of the mechanism that allows the first support member 14b to move up and down as described above include a fluid pressure cylinder that uses fluid pressure, and a spring. The pressing force of the mechanism provided in the first support member 14b continuously presses the conveyed glass tube G against the first regulating member 14a, and can move up and down according to variations in the outer diameter of the glass tube G. Set to

  As shown in FIG. 2A, the first regulating member 14 a has a contact surface F <b> 1 that comes into contact with the upper end of the glass tube G. The first support member 14b has a contact surface that contacts the lower end of the glass tube G. The contact surface F1 of the first restriction member 14a and the contact surface of the first support member 14b are preferably made of a resin material from the viewpoint of reducing the impact on the glass tube G, and the contact surface of the first restriction member 14a. About F1, it is preferable to apply a comparatively hard resin material from a viewpoint of improving the positioning accuracy of the glass tube G.

  The 1st control member 14a and the 1st support member 14b of this embodiment are arrange | positioned in the position which opposes up and down on both sides of the glass tube G. Moreover, both the 1st control member 14a and the 1st support member 14b are comprised with the roller. The roller is rotated around a rotation axis orthogonal to the tube axis direction of the glass tube G. The roller may be driven by the glass tube G being conveyed or may be driven to rotate.

  The second positioning unit 15 is arranged at a position (second position) on the downstream side of the first positioning unit 14 (first position) in the conveyance path of the glass tube G. The second positioning unit 15 has the same configuration as the first positioning unit 14. That is, the second positioning unit 15 includes a second restriction member 15a and a second support member 15b. As shown in FIG. 2A, the second regulating member 15a has a contact surface F2 that is in contact with the upper end of the glass tube G, and the second support member 15b is in contact with the lower end of the glass tube G. Has a surface. The second restriction member 15a and the second support member 15b are arranged at positions facing each other up and down across the glass tube G, and both are constituted by rollers.

<Operation of Glass Tube G Positioning Device 11 and Cutting Method of Glass Tube G>
Next, the main actions of the glass tube G positioning device 11 will be described together with the method for cutting the glass tube G. The method for cutting the glass tube G is based on positioning the glass tube G conveyed horizontally in the tube axis direction and bringing the blade member B into contact with the glass tube G from above the positioned glass tube G. Is a method of cutting. In the method for cutting the glass tube G, the first regulating member 14a and the first supporting member 14b, and the second regulating member 15a and the second supporting member 15b are used for positioning the glass tube G.

Here, the precision of the cut surface of the glass tube G is demonstrated with reference to FIG.
The outer diameter of the continuously formed glass tube G may gradually change within dimensional tolerances. When the outer diameter of the glass tube G changes so as to expand within the dimensional tolerance, as shown in FIG. 3A, when the vertical position of the roller R2 below the glass tube G is fixed, The upper end position of the glass tube G conveyed horizontally in the direction moves upward as shown by a two-dot chain line in FIG. Also, for example, when the glass tube G vibrates in the vertical direction, if the vertical position of the roller R2 below the glass tube G is fixed, the upper end position of the glass tube G conveyed horizontally in the tube axis direction changes. To do. At this time, since the tip position of the blade member B is set to a predetermined position in advance, the contact pressure at which the blade member B contacts the upper end of the glass tube G changes as the upper end position of the glass tube G changes. To do. Thereby, since the state of the flaw for cutting formed in the glass tube G also changes, in the cutting | disconnection of the glass tube G using the flaw for cutting, as schematically shown in FIG.3 (c), a glass tube A cut surface C2 that is relatively largely inclined with respect to the surface orthogonal to the tube axis direction of G may be formed. That is, the change in the contact state between the glass tube G and the blade member B conveyed horizontally in the tube axis direction causes a reduction in accuracy of the cut surface of the glass tube G.

  According to the cutting method of the glass tube G described above, the lower end position of the glass tube G is adjusted by the first support member 14b, and the upper end position of the glass tube G is positioned by the first regulating member 14a. Even if the glass tube G has a different outer diameter within the dimensional tolerance, the upper end position of the glass tube G can be similarly positioned. For example, even if the glass tube G vibrates, the upward movement of the glass tube G is regulated by the first regulating member 14a. Thereby, since the upper end position of the glass tube G is stabilized, it becomes easy to stabilize the contact pressure of the blade member B which contacts the glass tube G from upper direction. The second restriction member 15a and the second support member 15b also have the same action as the first restriction member 14a and the first support member 14b.

The end portion of the glass tube G cut to a predetermined length by the cutting method of the glass tube G is cut again under precise conditions as necessary, and then subjected to processing such as baked.
According to the embodiment described in detail above, the following operational effects are exhibited.

  (1) The glass tube G is cut by positioning the glass tube G conveyed horizontally in the tube axis direction and bringing the blade member B into contact with the glass tube G from above the positioned glass tube G. This is a method of cutting G. In the method of cutting the glass tube G, for example, the first regulating member 14a and the first support member 14b are used in positioning the glass tube G. The first regulating member 14a regulates the upward movement of the glass tube G. The first support member 14b is configured to be vertically movable so as to support the glass tube G from below and to bring the glass tube G into contact with the first regulating member 14a.

  According to this method, since the above-described action can be obtained, the accuracy of the cut surface of the glass tube G can be easily increased. Thereby, for example, it is possible to prevent glass fragments from being scattered with the cutting of the glass tube G. In addition, for example, when the end of the glass tube G is cut again under conditions more precise than the above cutting, the cutting length can be set shorter, so that the yield can be improved. .

  (2) In the method of cutting the glass tube G, for example, it is preferable to use rollers as the first regulating member 14a and the first support member 14b. In this case, it is possible to suppress the first regulating member 14a and the first support member 14b from rubbing against the glass tube G. Therefore, for example, it is possible to suppress the occurrence of scratches on the outer peripheral surface of the glass tube G.

  (3) In the method of cutting the glass tube G, the first restriction member 14a and the second restriction member 15a are arranged on the downstream side of the first position and the first position in the conveyance path of the glass tube G. The second position is preferably used at each position. In this case, the positioning accuracy of the upper end of the glass tube G can be increased. Therefore, the accuracy of the cut surface of the glass tube G can be further increased.

  (4) In the cutting method of the glass tube G, it is preferable that the 1st control member 14a has the contact surface F1 contacted with the upper end of the glass tube G. FIG. Moreover, it is preferable that the 2nd control member 15a has the contact surface F2 contacted with the upper end of the glass tube G. FIG. In this case, the positioning accuracy of the upper end of the glass tube G can be increased by directly positioning the upper end of the glass tube G. Therefore, the accuracy of the cut surface of the glass tube G can be further increased.

  (5) In the method of cutting a glass tube, the regulating member and the supporting member are a set (for example, the first regulating member 14a and the first supporting member 14b) arranged at positions facing each other up and down across the glass tube G. It is preferable to include. In this case, for example, the vertical vibration of the glass tube G can be suitably suppressed. Therefore, the accuracy of the cut surface of the glass tube G can be further increased.

  (6) The glass tube G positioning device 11 is used for positioning the glass tube G conveyed to the cutting device 13. The cutting device 13 is a device that cuts the glass tube G by bringing the blade member B into contact with the glass tube G from above the glass tube G conveyed horizontally in the tube axis direction. The positioning device 11 includes, for example, a first positioning unit 14 as a positioning unit that positions the glass tube G that is transported horizontally in the tube axis direction. The first positioning portion 14 includes a first regulating member 14a and a first support member 14b. The first regulating member 14a regulates the upward movement of the glass tube G. The first support member 14b is configured to be vertically movable so as to support the glass tube G from below and to bring the glass tube G into contact with the first regulating member 14a. According to this configuration, the effects described in the above section (1) can be obtained.

(Example of change)
The above embodiment may be modified as follows. In the following description, a modification example of the cutting method of the glass tube G will be mainly described. However, the positioning device 11 for the glass tube G can be similarly modified.

  In the method for cutting the glass tube G, the first regulating member 14a and the first support member 14b are arranged at positions facing each other up and down across the glass tube G. For example, in the transport path of the glass tube G The first support member 14b may be disposed downstream of the first regulating member 14a. The positions of the second restriction member 15a and the second support member 15b can also be changed.

  For example, as shown in FIG. 2B, the contact surface (contact surface F1 or contact surface F2) of the restricting member (first restricting member 14a or second restricting member 15a) is inclined with respect to the horizontal direction and the vertical direction. It can be changed to an inclined surface. As in this modified example, the contact surface of the regulating member used in the method for cutting the glass tube G is changed to a contact surface that contacts the outer peripheral surface of the glass tube G other than the upper end of the glass tube G. The upward movement may be restricted. Further, as in this modified example, the contact surface of the restricting member can be constituted by a plurality of contact surfaces. In addition, about the support member (the 1st support member 14b or the 2nd support member 15b), the number and angle of the contact surface which contact the glass tube G can be changed.

  In the method for cutting the glass tube G, the regulating member is used at each of the first position and the second position in the conveyance path of the glass tube G. For example, either the first position or the second position The regulating member arranged at one position may be omitted. Further, in the method for cutting the glass tube G, the third position is located on the transport path upstream of the first position, the transport path between the first position and the second position, or the transport path downstream of the second position. And a restricting member or a supporting member can be used at the third position. For example, since the bending of the glass tube G can be suppressed by increasing the number of contact points between the regulating member or the support member and the glass tube G in the conveyance path of the glass tube G, the positioning accuracy of the glass tube G is further increased. Can do.

  -In the cutting method of the said glass tube G, although the roller is used as a control member and a supporting member, you may change at least 1 roller into the member which cannot rotate, for example. Moreover, you may change at least one of a control member and a supporting member into a conveyor.

-In the cutting method of the said glass tube G, you may use the member which controls the movement of the horizontal direction orthogonal to the tube-axis direction of the glass tube G further.
In the method of cutting the glass tube G, the glass tube G continuously conveyed from the molding machine (pulling device 12) is cut, but the glass tube for cutting a predetermined length of glass tube having both ends is used. It can also be applied to a cutting method. That is, the positioning device 11 for the glass tube G can be used as the positioning device 11 for positioning the glass tube having both ends without installing the positioning device 11 on the downstream side of the molding machine (pulling device 12). In this case, for example, the first regulating member 14a or the first support member 14b configured by a roller may be rotationally driven to transport the glass tube, or a transport device provided separately may be used in combination. When cutting a glass tube having a predetermined length having both ends, for example, when the blade member B is brought into contact with the glass tube or when the glass tube is cut, the conveyance of the glass tube may be stopped.

  DESCRIPTION OF SYMBOLS 11 ... Positioning device, 13 ... Cutting device, 14 ... 1st positioning part, 14a ... 1st control member, 14b ... 1st support member, 15 ... 2nd positioning part, 15a ... 2nd control member, 15b ... 2nd support Member, B ... blade member, F1, F2 ... contact surface, G ... glass tube.

Claims (6)

A glass tube cutting method for positioning a glass tube conveyed horizontally in the tube axis direction and cutting the glass tube by bringing a blade member into contact with the glass tube from above the positioned glass tube,
A regulating member for regulating upward movement of the glass tube in positioning the glass tube;
A supporting member that supports the glass tube from below and is capable of moving up and down so as to bring the glass tube into contact with the regulating member.   The glass tube cutting method according to claim 1, wherein a roller is used as the regulating member and the supporting member.   The said restriction | limiting member is used in each position of the 1st position and the 2nd position downstream from the said 1st position in the conveyance path | route of the said glass tube. Glass tube cutting method.   The method of cutting a glass tube according to any one of claims 1 to 3, wherein the regulating member has a contact surface that is in contact with an upper end of the glass tube.   5. The glass tube according to claim 1, wherein the restricting member and the support member include a set disposed at positions facing each other vertically with the glass tube interposed therebetween. Cutting method. A glass tube positioning device for positioning a glass tube conveyed toward a cutting device, wherein the cutting device has a blade member on the glass tube from above the glass tube conveyed horizontally in the tube axis direction. A device that cuts the glass tube by bringing it into contact;
The positioning device includes:
A positioning portion for positioning the glass tube conveyed horizontally in the tube axis direction;
The positioning part is
A regulating member that regulates the upward movement of the glass tube;
A glass tube positioning device comprising: a support member that supports the glass tube from below and is capable of moving up and down so that the glass tube contacts the regulating member.