JPH10264091A - Feed device of tube cutting machine and tube guide thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a nondefective ratio of cutting working by preventing generation of breakage and crack in a tube and generation of a defective of a feed dimension when a plurality of long size tubes such as quartz glass tubes which are arranged in parallel and are supported in the horizontal states on the circular arc recessed surface of a tube guide are transversely fed by prescribed lengths to the cutting location of a disc cutter and preventing generation of breakage and crack also at the time of a cutting. SOLUTION: On a carriage 5 of a feed device which transversely feeds a plurality of long size tubes 3 arranged in parallel on the circular arc recessed surface 4 of a tube guide 2 by performing a batch holding for the tubes 3 by a clamp mechanism 6, an elevating/lowering mechanism lifting up the long size tubes 3 held in a several millimeter order when the tubes 3 are transversely fed is provided. On the circular arc recessed surface 4 of the tube guide 2, a separator separating the long size tubes 3 arranged on the circular arc recessed surface 4 by prescribed numbers into two or more groups is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeder for a tube cutting machine which arranges a plurality of long tubes in parallel to a cutting position of a disk cutter for cutting a long tube from the outside and intermittently feeds the tubes by a predetermined length. The present invention relates to a device and a tube guide provided in the feeding device.

[0002]

2. Description of the Related Art A glass tube used as a molding material for an arc tube of a discharge lamp is obtained by cutting a raw tube, which is a long tube having a total length of about 2 to 3 m, into predetermined dimensions corresponding to the product size of various arc tubes. It is made. In order to increase the processing efficiency, a tube cutting machine that arranges a plurality of long tubes in parallel and cuts them all at once with a disk cutter is used for cutting the long tubes. This type of tube cutting machine has a tube guide that supports a plurality of long tubes to be cut by a disk cutter in parallel with an arcuate concave surface having a curvature corresponding to the edge of the disk cutter and supports the tube in a horizontal state, and is supported by the tube guide. And a carriage for intermittently laterally feeding the plurality of long tubes to the cutting position of the disk cutter by a predetermined length while holding the plurality of long tubes together.

[0003]

The conventional feeder used by the applicant of the present invention is designed to be able to feed a relatively fragile long tube such as a quartz glass tube without damaging the tube. A plurality of tube guides are provided at required intervals, and the surface layer of the arcuate concave surface of each tube guide is formed of a cushion material such as rubber. In addition, the carriage has a configuration in which one of the tube guides is installed, and a plurality of long tubes arranged in an arc-shaped concave surface of the tube guide are collectively held by a clamp mechanism that presses and clamps a vise from above. It has become.

[0004] When the carriage holds the long tube, the carriage moves horizontally as it is and sends it sideways. At this time, the long tube is pressed by the pressing force of the vise.
Except for the carriage tube guide, each tube guide slides on the concave surface of the circular arc while being pressed against the surface.Therefore, strong frictional contact with the cushion material that forms the surface layer of the concave circular surface reduces defective feed dimensions. As a result, the length of the tube cut by the disk cutter becomes uneven, and the cushion material is severely worn, so that the cushion material must be replaced frequently.

Further, in the long tube, a portion supported by the tube guide of the carriage to which the pressing force of the vise is directly applied is sunk into the cushioning material forming the surface layer portion of the arcuate concave surface of the tube guide, and the other end of the long tube is adjoined. When the carriage is moved horizontally in this state, it may be subjected to excessive stress and cracks may occur.

Next, when the carriage is moved horizontally and the long tube is sent to the cutting position of the disk cutter, the long tube is pressed and fixed to the tube guide by vises arranged on both sides of the disk cutter. Next, the holding state of the long tube by the clamp mechanism of the carriage is released, but at this time, if the fragile long tube such as a quartz glass tube is strongly pressed with a vise, there is a risk of crushing. In addition, if the pressing method is weak, the long tube rubs during cutting, causing problems such as distortion of the cut end.

For this reason, the applicant assigns the arc concave surface of the tube guide to the inclination at which each of the long tubes arranged on the arc concave surface rolls in the rotation direction of the disk cutter, and the lower end position of the inclination. In addition, a stopper for preventing the rolling of the long tube is attached so that the long tube is not rubbed even if it is pressed with an appropriate force that does not cause crushing.

However, if the arcuate concave surface of the tube guide is arranged at such an inclination, the load of all the tubes is applied to the lowermost long tube which is stopped by the stopper attached at the lower end position of the inclination. Moreover, due to the vibration generated when each long tube is cut, the rotational force of the disk cutter rotating at high speed, and the repetition of the chuck by the vise, the tube located at the end in the circumferential direction of the vise has an arcuate concave surface. As a result, a rotating force that rolls toward the lowermost end is generated, so that a load greater than that of all tubes is applied to the lowermost long tube. For this reason, there was a problem that the longest tube at the bottom was easily broken or cracked at the time of cutting.

Therefore, the present invention eliminates the risk of breakage or cracking of the long tube arranged side by side on the arcuate concave surface of the tube guide by means of the carriage, while at the same time eliminating the possibility of the tube guide. Prevents the long tube from having poor feed dimensions due to wear of the cushion material arranged on the concave concave surface and frictional contact with the cushion material,
Further, it is a technical object of the present invention to eliminate the risk of breakage or cracking of the long tube at the time of cutting, and to improve the yield rate of the long tube in the cutting process.

[0010]

In order to solve the above-mentioned problems, a feeder of a tube cutting machine according to the present invention provides a long tube cut by a disk cutter to a circular arc having a curvature matching the edge of the disk cutter. A plurality of tube guides arranged in parallel with the concave surface and supported in a horizontal state are installed at required intervals along the feeding direction of the long tube, and at least one of the plurality of tube guides is supported by the tube guide. It is installed on a carriage equipped with a clamp mechanism that holds the long tubes all together.When the long tubes that are held together by the clamp mechanism are fed sideways, the long tubes are lifted by several millimeters. An up-and-down mechanism is provided.

[0011] In this feeding device, when a plurality of long tubes supported by a tube guide installed on a carriage are laterally fed while being held together by a clamp mechanism, the long tubes are provided on the carriage. The tube is lifted up by the lifting mechanism and slides on the arc concave surface of the tube guide other than the tube guide installed on the carriage with low frictional resistance, so the friction with the arc concave surface may damage the tube surface. In addition, when the surface portion of the arc-shaped concave surface is formed of a cushion material, wear of the cushion material can be suppressed, and at the same time, a feeding dimension defect of the long tube due to frictional contact with the cushion material is prevented. You can also.

In the tube guide according to the present invention, a plurality of long tubes arranged in parallel to the concave surface of the arc are divided into two or more groups each having a predetermined number and a separator is provided. As a result, the entire load generated in the long tubes arranged on the concave surface of the arc of the tube guide is not concentrated only on the long tube located at the bottom, so that the bottom long tube is cut off. In this case, the risk of breakage or cracking is reduced, and the yield rate of the cutting process is greatly improved.

[0013]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 is a perspective view showing a feeder of a tube cutting machine according to the present invention, FIG. 2 is a front view schematically showing a basic configuration of the feeder, and FIG. 3 is a basic configuration of a carriage provided in the feeder. FIG. 4 is a perspective view showing a tube guide.

In FIG. 1, reference numeral 1 denotes a disk cutter, and 2 denotes a plurality of long tubes 3 such as a quartz glass tube cut by the disk cutter 1 arranged in parallel on an arcuate concave surface 4 having a curvature corresponding to the edge of the disk cutter 1. The tube guides 5, which are supported in a horizontal state, are carriages for holding a plurality of long tubes 3 supported by the tube guides 2 collectively by the clamp mechanism 6 and feeding the tubes to the cutting position of the disk cutter 1.

A plurality of tube guides 2 are provided at required intervals along the direction in which the long tube 3 is fed by the carriage 5, and one of them is provided on the carriage 5. Each of the tube guides 2 has an arcuate concave surface 4 arranged such that the long tube 3 arranged on the arcuate concave surface 4 causes the disk cutter 1 to roll in the rotation direction F, and a lower end position of the inclination. And long tube 3
A guide roller 7 which also serves as a stopper for preventing rolling is mounted. Further, a plurality of long tubes 3 arranged in parallel with the concave circular surface 4 are divided into two or more groups by a predetermined number corresponding to about half of the tubes. Is provided. The separator 8 is made of a rubber cushion material 9.
From the surface of the circular concave surface 4 to which the circular concave surface 4 is attached.
Are formed by pins protruding toward the center X of a virtual circle S depicting

A clamp mechanism 6 provided on the carriage 5 is provided with a vise 10 for pressing a plurality of long tubes 3 arranged in parallel with the arcuate concave surface 4 of the tube guide 2 installed on the carriage 5 from above, An air cylinder 11 for moving the vise 10 forward and backward with respect to the long tube 3, and the tip of the vise 10 pressed against the long tube 3 has an arc convex surface having a curvature corresponding to the arc concave surface 4 of the tube guide 2. The cushion member 12 made of rubber is attached to the arc convex surface while being formed.

The carriage 5 is provided with an elevating mechanism 13 for lifting up the elongate tube 3 by several millimeters when the elongate tube 3 collectively held by the clamp mechanism 6 is fed laterally. The elevating mechanism 13 includes a carriage 5
Elevating base 14 on which the tube guide 2 and the clamp mechanism 6 are mounted, a tire-type air spring 15 on which the elevating base 14 is mounted, and an elevating mechanism mounted on the air spring 15 by applying air pressure thereto. It comprises a compressed air supply source 16 for raising the base 14 and a stopper 17 for regulating the height of the raising and lowering base 14 and holding the raised and lowering base 14 in a horizontal state.

The carriage 5 is supported by a pair of guide shafts 18 and 18 so as to be slidable along the feeding direction of the long shaft 3, and cuts the long tube 3 by a double-acting air cylinder 19. It can be moved horizontally by a predetermined stroke according to the length.

On both sides of the disk cutter 1, tube guides 2, 2 for supporting the distal end of the long tube 3 sent to the cutting position of the disk cutter 1, and arcs of the tube guides 2, 2 A pair of vises 20, 20 are provided movably with respect to the concave surface 4, and the tips of the long tubes 3 cut by the disc cutter 1 are pressed against the tube guides 2, 2 by the vises 20, 20. It is designed to be fixed. In addition, each vise 20 is formed in an arc convex surface having a curvature corresponding to the arc concave surface 4 of the tube guide 2, as in the vise 10 of the clamp mechanism 6 provided in the carriage 5, the tip of the vise 20 being pressed against the long tube 3. At the same time, a rubber cushion material 21 is attached to the convex surface of the arc.

The above is the configuration of the feeder of the tube cutting machine shown in the drawings. Next, the operation will be described.
First, a plurality of long tubes 3 to be cut by the disk cutter 1 are stretched over the respective tube guides 2 installed on the front side of the disk cutter 1 so as to be arranged in parallel with the arcuate concave surfaces 4 of the respective tube guides 2. Place. In addition,
At this time, in order to enable the long tube 3 to be easily mounted, the clamp mechanism 6 of the carriage 5 moves the tip of the link 22 to which the vise 10 is attached and the tip of the link 22 up and down to move the vise 10. The detachable pin 23 is connected to the tip of the air cylinder 11 to be advanced and retracted and connected in a pair, and the link 22 is removed from the air cylinder 11 so that the link 22 can be retracted from above the tube guide 2 of the carriage 5. I have.

When the long tubes 3 are placed side by side in parallel with the arcuate concave surface 4 of each tube guide 2, the link 22 and the tip of the air cylinder 11 are connected again by the pins 23, and the feeder is started. . Thereby, first, the air cylinder 11 of the clamp mechanism 6 provided on the carriage 5 is operated, and the vise 10 is pressed from above the long tube 3 supported by the tube guide 2 provided on the carriage 5, The long tube 3 is sandwiched between the vise 10 and the tube guide 2 and is held together.

Next, high-pressure air is supplied from a compressed air supply source 16 into the air spring 15 of the elevating mechanism 13 provided on the carriage 5, and the air spring 15 is expanded by the air pressure, and the elevating base 14 is moved to the stopper 17. The elongate tube 3 held by the vise 10 of the clamp mechanism 6 mounted on the elevating base 14 and the tube guide 2 is lifted up, for example, by about 1 to 2 mm.

In this state, the air cylinder 19 operates,
The carriage 5 is horizontally moved by a predetermined stroke corresponding to the cutting length of the long tube 3, and the clamp mechanism 6 of the carriage 5 is moved.
The long tube 3 held together by the above steps slides smoothly on the arcuate concave surface 4 of each tube guide 2 except for the tube guide 2 provided on the carriage 5 in a contact state with a very small frictional resistance, so that the disc cutter 1 The tube is fed sideways to the cutting position, and the feeding dimension of the long tube 3 which is generated at the time of the side feeding and the occurrence of cracks are reliably prevented, and the cushion material 9 which forms the surface layer of the arcuate concave surface 4 is also worn. Is prevented.

When the transverse movement of the carriage 5 is completed, the vise 20, 2 disposed on both sides of the disc cutter 1 is completed.
0 is advanced to the distal end side of the long tube 3 supported by the tube guides 2 and 2 installed on both sides thereof, and the distal end side is pressed against the tube guides 2 and 2 to be fixed at the cutting position. Next, the clamp mechanism 6 of the carriage 5 is operated, and the vise 10 pressed against the long tube 3 is retracted by the air cylinder 11 to release the holding state of the long tube 3 by the vise 10. The carriage 5 is pulled back by the air cylinder 19 and returns to the original position.

Then, the disk cutter 1 advances to the cutting position of the long tube 3 while being driven to rotate at a high speed, and the tip of the plurality of long tubes 3 arranged in parallel with the arcuate concave surface 4 of the tube guide 2. Cut the sides collectively.
At this time, the plurality of long tubes 3 lined up in the arcuate concave surface 4 of the tube guide 2 are divided into two groups of about half by the separator 8 provided in the arcuate concave surface 4. The entire load of all the tubes is not applied to the long tube 3 which is stopped by the stopper guide roller 7 provided at the lower end position. Of course, no full load is applied. Therefore, the risk that these long tubes 3 are broken or cracked at the time of cutting is reduced, and the non-defective rate of cutting is greatly improved.

The separator 8 is formed by a single pin that stands upright at a substantially central position of the arcuate concave surface 4 of the tube guide 2, and the interval between the pins divides the arcuate concave surface 4 into three. Or two metal plates may be provided instead of the pins. The number of the tube guides 2 installed on the carriage 5 is not limited to one, but may be plural.

[0027]

According to the present invention, when a plurality of long tubes made of a quartz glass tube or the like are collectively held by a clamp mechanism of a carriage and laterally fed to a cutting position of a disk cutter, the long tubes are used. Eliminates the risk of breakage or cracking, or the possibility of defective feed dimensions.
Furthermore, since there is no possibility of breakage or cracking when cutting with a disk cutter, there is a very excellent effect that the yield rate in cutting long tubes is significantly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a feeder according to the present invention.

FIG. 2 is a front view schematically showing a basic configuration of a feeder according to the present invention.

FIG. 3 is a cross-sectional view schematically showing a basic configuration of a carriage provided in the feeder according to the present invention.

FIG. 4 is a perspective view showing an example of a tube guide provided in the feeder according to the present invention.

[Explanation of symbols]

 1 ··· Disc cutter 2 ··· Tube guide 3 ····· Long tube 4 ···· Concave concave surface of tube guide 5 ··· Carriage 6 ··· Clamping mechanism 7 Guide roller 8 Separator 13 Lifting mechanism 14 Lifting base 15 Air spring 16 Compressed air supply Source 17 Stopper

Claims (5)

[Claims] 1. A tube guide for supporting a plurality of long tubes to be cut by a disk cutter in parallel with an arcuate concave surface having a curvature corresponding to the edge of the disk cutter, and a plurality of tubes supported by the tube guide. And a carriage for intermittently feeding a long length of tubes at a predetermined length to the cutting position of the disk cutter intermittently, and the tube guide (2) includes a long tube ( A plurality of the long tubes (3) supported by the tube guide (2) are collectively held, and at least one of the plurality of the clamp mechanisms (6) is installed at a required interval along the feed direction of (3). ) Is installed on the carriage (5) provided with a long tube (3) which is collectively held by the clamp mechanism (6). A feeding device for a tube cutting machine, comprising a lifting mechanism (13) for lifting up the long tube (3) by several millimeters when feeding. 2. A lift base (14) on which a tube guide (2) and a clamp mechanism (6) are mounted on the carriage (5), and the lift base (14). A tire-type air spring (15) on which the base is mounted, and the lifting base (14) by applying air pressure to the air spring (15)
2. A feeding device according to claim 1, comprising a compressed air supply source (16) for raising the pressure, and a stopper (17) for restricting the height of the lift base (14). 3. A tube guide for supporting a plurality of elongated tubes to be cut by a disk cutter in parallel with a plurality of circular concave surfaces having a curvature corresponding to the edge of the disk cutter and supporting the tubes in a horizontal state. A plurality of long tubes (3) arranged parallel to the concave arc surface (4)
A tube guide, which is divided into two or more groups by a predetermined number, and a separator (8) is provided. 4. The separator (8) comprises a pin projecting from the surface of the concave arc surface (4) toward the center (X) of an imaginary circle (S) describing the concave arc surface (4). Tube guide as described. 5. The elongated tube (3) arranged on the arc-shaped concave surface (4) is arranged at an inclination which causes the disk cutter (1) to roll in the rotation direction (F). 5. The tube guide according to claim 3, wherein a guide roller (7) serving also as a stopper for preventing rolling of the long tube (3) is attached at a lower end position of the inclination.