JP4590073B2 - Flexible pipe welding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a welding joint apparatus for flexible pipes, and more particularly, to a treatment instrument for an endoscope. Possible The present invention relates to a welding joint device for a flexible pipe that welds and joins a flexible pipe and a tip metal part (hereinafter also referred to as a tip part) by laser pulse irradiation.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as an endoscopic forceps device that joins a flexible flexible tube formed by winding a metal wire in a coil shape and a tip part by laser welding, for example, an invention described in Japanese Patent Publication No. 7-28854 There is.
[0003]
As shown in FIG. 9, in the above invention, the member 101 and the soft flexible tube are inserted into the member 101 having the cylindrical portion and constituting the lever operating mechanism. The laser beam 103 is spot-irradiated from the outer peripheral surface of the cylindrical portion while being rotated and bonded by welding.
[0004]
Further, as a laser welding apparatus for welding by irradiating laser beam to the end portions of two members to be joined, there is an invention described in, for example, Japanese Patent Laid-Open No. 6-99298.
[0005]
As shown in FIG. 10, the laser welding apparatus of the present invention has a moving table 105 driven by a motor 104 in the direction of arrow A or B via a screw portion 109, and is provided on and joined to the moving table 105. A moving side holding mechanism 106 that holds the other member and a fixed side holding mechanism 107 that holds the other member to be joined are provided.
[0006]
The moving-side gripping mechanism 106 and the fixed-side gripping mechanism 107 are rotatable by a spline shaft 109 and a gear train (not shown) that transmit the rotation of the spindle drive motor 108.
[0007]
Further, the moving amount detecting means 110 such as an encoder that detects the moving amount of the moving table 105 based on the number of rotations of the screw portion 109 and the one member to be joined by the movement of the moving table 105 abut on the other member. A contact detection means (not shown) for detecting the time point when the contact is detected, and from the time when the contact detection means detects the contact of both members until the detected movement amount of the movement amount detection means 110 reaches a set value. And control means (not shown) for rotating the motor 104 in the forward direction or the reverse direction.
[0008]
In the laser welding apparatus having the above configuration, the moving table 105 is first moved in the direction of arrow A shown in FIG. When the member gripped by the moving side gripping mechanism 106 comes into contact with the member gripped by the fixed side gripping mechanism 107, the load current of the motor 104 increases.
[0009]
Thereafter, when the motor 104 is rotated in the forward direction until the rotation speed detected by the movement amount detection means 110 reaches the set value, the moving table 105 is further moved in the direction of arrow A, and both members are set. It is pressed by pressing force.
[0010]
In this state, both members are welded together by irradiating laser light onto the ends of both members while rotating both members by the spindle drive motor 108.
[0011]
[Problems to be solved by the invention]
However, in the endoscopic forceps device that performs laser welding to the tip part 101 and the flexible flexible tube 102 formed by winding the metal wire of the prior art in a coil shape, the flexible flexible tube 102 and When laser welding is performed in a state where the axis of the tip part 101 is bent and bent, both are bent and joined in a "<" shape, resulting in a shape that cannot be inserted into an endoscope or the like. End up.
[0012]
Further, in the conventional laser welding apparatus shown in FIG. 10, when the members to be joined to each other are replaced with the flexible flexible tube 102 and the tip part 101 as described above, the tip part 101 is used. Even if the flexible flexible tube 102 is inserted into and contacted with each other and the contact state is detected by a change in the load current of the motor 104, the flexible tube 102 is soft and bent, There is a high possibility that the contact state cannot be detected, and even if contact detection is possible with a slight increase in load current, depending on the softness variation of the flexible tube 102, the shape of There is a possibility that a problem of bending and joining may occur.
[0013]
Even when there is a situation where the flexible tube 102 and the tip part 101 cannot be assembled normally due to a component defect or the like, the increase in the load current of the motor 104 is caused by the flexible tube 102 and the tip part 101. There is a risk that the error movement that causes the contact state occurs, and the flexible tube 102 or the tip part 101 is made defective by laser irradiation, or the gripping mechanism or the like is melted and the tip part 101 cannot be held. .
[0014]
The present invention has been made in consideration of such a conventional open topic, Formed by winding a metal wire into a coil A flexible tube that can be welded together by attaching the flexible tube and the tip metal component without misalignment of the shaft core, and can flexibly prevent the occurrence of defective products due to poor assembly of the flexible tube and the tip metal component. It is an object of the present invention to provide a welded joint apparatus for sex tubes.
[0015]
[Means for Solving the Problems]
The invention according to claim 1 is formed by winding a metal wire in a coil shape. OK In a flexible pipe welding and joining apparatus in which a flexible pipe and a tip metal part are brought into contact with each other and welded by laser irradiation, a rotatable rotary chuck having a hollow hole for gripping and releasing the flexible pipe And a holder that is arranged coaxially with the rotation center of the rotary chuck and that can rotate while holding the tip metal component, and is disposed so as to be able to advance and retreat in a region between the rotary chuck and the holder. The gripping chuck for gripping and gripping the flexible tube penetrating through the hollow hole of the rotating chuck, and the holder holding the tip metal component are guided in the rotating shaft direction of the rotating chuck to grip the flexible tube. The movable means for attaching the tip of the flexible tube to the tip metal part by approaching the gripping chuck, and the amount of force acting on the gripping chuck when the tip metal part and the tip of the flexible pipe are attached. Flexible tube Contact detecting means for detecting contact of the tip metal part, and control means for controlling movement of the moving means and gripping control of the flexible chuck of the rotary chuck based on a detection signal of the contact detecting means. It is characterized by having.
[0016]
According to this invention, when the flexible tube penetrating the rotating chuck and gripped by the gripping chuck is brought into contact with the tip metal part held by the holder, and the tip of the flexible tube is attached to the tip metal part, The contact detection means detects contact between the flexible tube and the tip metal part. If the approach movement of the holder with respect to the gripping chuck is stopped by the detection signal of the contact detection means, it is possible to prevent an excessive force from acting on the tip metal part and the flexible tube. By gripping the tube, the tip metal part and the flexible tube can be held without bending. As a result, the tip metal part and the flexible tube are shaped like a “<” by welding by laser irradiation. Can be joined without bending.
[0017]
The invention according to claim 2 is formed by winding a metal wire in a coil shape. OK In a flexible pipe welding and joining apparatus in which a flexible pipe and a tip metal part are brought into contact with each other and welded by laser irradiation, a rotatable rotary chuck having a hollow hole for gripping and releasing the flexible pipe And a holder that is arranged coaxially with the rotation center of the rotary chuck and that can rotate while holding the tip metal component, and is disposed so as to be able to advance and retreat in a region between the rotary chuck and the holder. The gripping chuck for gripping and gripping the flexible tube penetrating through the hollow hole of the rotating chuck, and the holder holding the tip metal component are guided in the rotating shaft direction of the rotating chuck to grip the flexible tube. A moving means for attaching the tip of the flexible tube to the tip metal part by approaching the gripping chuck, and a shielding plate portion using a force acting on the gripping chuck when the tip metal part and the tip of the flexible pipe are attached. Displacement A light transmission type sensor that operates more and detects contact between the flexible tube and the tip metal part, and based on a detection signal of the light transmission type sensor, movement control of the moving means, flexibility of the rotary chuck And control means for performing gripping control on the tube.
[0018]
According to this invention, it is a configuration using a light transmission type sensor using a shielding plate portion that is displaced using the amount of force acting on the gripping chuck when the tip metal part and the flexible tube tip are mounted. As in the case of the invention described in Item 1, the tip metal part and the flexible tube can be held without being bent. As a result, the tip metal part and the flexible tube can be connected to each other by welding by laser irradiation. It can join without bending in the shape of a letter.
[0019]
According to a third aspect of the present invention, in the welding joint apparatus for flexible pipes according to the first or second aspect, the movement means moves until the contact between the flexible pipe and the tip metal part is detected. Movement amount detecting means for detecting the amount, and the control means grasps the difference between the movement amount detected by the movement amount detection means and a preset set amount, and the flexible tube and the tip metal It is characterized by determining an assembly failure with a part.
[0020]
According to this invention, the movement amount of the holder until the contact detection unit detects the contact between the flexible tube and the tip metal part is detected by the movement amount detection unit and compared with a preset set amount. When the amount of movement of the holder is smaller or larger than the set amount, it can be determined that the assembly failure between the flexible tube and the tip metal component has occurred, respectively, and the assembly failure between the flexible tube and the tip metal component can be determined. It is possible to provide a welded joint device for a flexible tube that can prevent the occurrence of defective products due to the above.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
(Embodiment 1)
(Constitution)
FIG. 1 is processed by the flexible pipe welding and joining apparatus according to the first embodiment of the present invention. Formed by winding a metal wire into a coil It is the schematic which shows the welding process state of the flexible pipe | tube 1 and the front-end | tip component 2. FIG.
[0022]
As shown in FIG. 1, the flexible tube 1 according to the first embodiment is inserted into a cylindrical portion provided at the end of the tip component 2, and rotates the flexible tube 1 and the tip component 2. Then, a laser pulse (laser light) 3 from the outer peripheral surface of the tip part 2 is spot-irradiated, and the welded portion 4 is formed on the flexible pipe 1 and the tip part 2 with the light energy, and the flexible pipe 1 and the tip part 2 are joined by welding.
[0023]
2 to 7 show the welding joint device of the first embodiment, FIGS. 2 and 3 are front and left side views showing the outline of the welding joint device, and FIG. 4 shows the flexible tube 1 and the tip part 2. 3 is a partial cross-sectional view showing the holder 8.
[0024]
5 is a front view of the gripping chuck 34 and the contact detection member 37 of the flexible tube 1 according to the first embodiment. FIG. 6 is a front view of the gripping chuck 34 of the flexible tube 1 according to the first embodiment. FIG. 6 is a left side view of the contact detection member 37, and FIG. 6 is a right side view of the grip chuck 34 and the contact detection member 37 of the flexible tube 1 according to the first embodiment.
[0025]
In the welding joining apparatus according to the first embodiment, a holder support base 6 and a chuck support base 7 are provided on a rotary base 5 disposed on an upper part of a base 70 so as to face each other with a certain distance therebetween. A holder 8 that holds the tip component 2 is rotatably supported on the holder support base 6, and a pulley 9 is connected to the holder 8 so as to sandwich the holder support base 6.
[0026]
As shown in FIG. 4, the holder 8 is provided with an insertion hole 10 into which the tip part 2 is fitted.
[0027]
Further, a cored bar 11 having a tapered portion at the tip is fixed to the cylindrical cored bar holder 12 by an immobilizer 13, and an inner peripheral hole part formed by communicating the cored bar holder 12 with the insertion hole 10 of the holder 8. The cored bar 11 is projected in the direction of the arrow B through the insertion hole 10 in a coaxial arrangement with the rotating shaft of the holder 8. Further, the metal core holder 12 is fixed at a fixed position in the holder 8 by a holding screw 14 screwed into an inner peripheral screw portion formed in communication with the inner peripheral hole portion.
[0028]
One end surface of the metal core holder 12 forms a bottom surface of the insertion hole 10 for the tip component 2, and when the flexible tube 1 is assembled to the tip component 2, Become. The outer diameter of the metal core 11 is set to be smaller than the inner diameter of the flexible tube 1 and the tip part 2.
[0029]
A rotary chuck 15 that grips the flexible tube 1 is rotatably supported on the chuck support base 7, and a pulley 16 is connected to the rotary chuck 15 so as to sandwich the chuck support base 7.
[0030]
The rotation chuck 15 is arranged such that the rotation center thereof coincides with the rotation center of the holder 8. A hollow hole 17 through which the flexible tube 1 can be inserted is provided so as to penetrate the chuck support 7, the rotary chuck 15, and the pulley 16.
[0031]
A pair of feed rollers 32 for feeding the flexible tube 1 to the rotary chuck 15 is provided at a position outside the B direction of the pulley 16 on the rotary base 5. On the rotation base 5, a penetration detection sensor 33 that detects the flexible tube 1 protruding through the hollow hole 17 of the rotation chuck 15 by the operation of the feed roller 32 is provided.
[0032]
As shown in FIGS. 2 and 3, the rotating base 5 is fixed on a moving base 26 via a pair of connecting members 25.
[0033]
A rotating shaft 19 held by a pair of shaft holding members 18 is rotatably provided below the rotating base 5. One end of the rotating shaft 19 is connected to a rotating motor 20 attached to one connecting member 25, and is rotated by the rotating motor 20.
[0034]
A pulley 21 and a pulley 22 are mounted on the rotary shaft 19 so as to correspond to the pulley 9 and the pulley 16, and a timing belt 23 and a timing belt 24 are respectively attached to the pulley 9 and the pulley 21, and the pulley 16 and the pulley 22. It is bridged and the rotational driving force of the motor 20 for rotation is transmitted to the pulley 9 and the pulley 16, so that the holder 8 and the rotating chuck 15 are rotationally driven synchronously.
[0035]
The moving base 26 is fixed on a moving table 27. A linear guide 28 is disposed between the base 70 and the moving table 27, and the moving table 27 is guided and moved in the direction of the rotation axis (A direction or B direction) of the holder 8 and the rotating chuck 15. A ball screw 29 supported by the base 70 so as to be rotatable along the direction of the rotation axis is screwed into a base portion 27 a provided on the lower side of the table 27. One end of the ball screw 29 is connected to a moving motor 30 as a moving means supported rotatably by the base 70 along the A direction (or B direction). By the rotation, the moving table 27 can be moved forward or backward in the A direction or the B direction.
[0036]
The moving motor 30 incorporates an encoder 31 as a moving amount detecting means, and the moving amount of the moving table 27 can be detected by the encoder 31.
[0037]
A gripping chuck 34 is disposed above the holder 8 and the rotating chuck 15. The gripping chuck 34 is connected to and supported by a moving plate 38 that is a component that constitutes a contact detection member 37 that detects a contact state when the flexible tube 1 is assembled to the tip component 2.
[0038]
In addition, a pair of claws 36 in which a pair of dog-shaped grooves 35 capable of gripping both the flexible tube 1 and the tip part 2 are formed to face each other are provided below the gripping chuck 34. Yes.
[0039]
As shown in FIGS. 2, 3, and 5 to 7, the abutment detection member 37 has a vertical base 54 fixed to a gate-type structure 58 erected from a base 70, and is attached to the vertical base 54. An upper moving base 48 is provided via a pair of upper linear guides 55 provided, and an upper and lower base 39 is attached to the upper moving base 48 via an upper and lower guide 49, and the movement is performed via the guide 40 by the upper and lower base 39. The plate 38 is supported.
[0040]
The moving plate 38 is guided by a guide 40 fixed to the upper and lower bases 39 and is movable in the direction of the rotation axis of the holder 8 and the rotating chuck 15, and from the moving plate 38 as shown in FIGS. 5 to 7. In addition, a round bar-shaped moving post 41 and a plate-shaped detection dog 42 which is bent at the upper end in the horizontal direction to form a shielding plate portion 42a are provided upright.
[0041]
The upper and lower bases 39 are provided with a fixed post 43 and an L-shaped plate 44. The L-shaped plate 44 is mounted with a light-emitting element and a light-receiving element that form a vertical detection optical path (not shown). A light transmission type sensor 45 having a detection groove 46 into which the shielding plate portion 42a enters is provided. The detection dog 42 and the transmission type sensor 45 constitute a contact detection means.
[0042]
The detection groove 46 of the light transmission type sensor 45 is arranged so that the detection dog 42 moved in the B direction via the moving plate 38 can be detected by applying a force in the B direction to the gripping chuck 34. .
[0043]
A tension spring 47 is hung on the moving post 41 provided on the moving plate 38 and the fixed post 43 provided on the upper and lower bases 39 to give an amount of force for pulling the moving plate 38 in the A direction.
[0044]
An upper and lower base 39 of the contact detection member 37 is engaged with an upper and lower guide 49 provided on an upward movement base 48 so that the gripping chuck 34 approaches or separates from the holder 8 and the rotary chuck 15 by the upper and lower guide 49. It is guided vertically in the vertical direction.
[0045]
A cylinder 50 is disposed on the upper moving base 48, and a rod 51 of the cylinder 50 is connected to an upper end of the upper and lower bases 39. When the cylinder 50 is driven, the gripping chuck 34 is moved vertically and vertically. To be driven.
[0046]
When the gripping chuck 34 is driven by the cylinder 50 and moves to the lower end, the flexible tube that penetrates the hollow hole 17 of the rotary chuck 15 by the groove 35 formed in the claw 36 attached to the gripping chuck 34. 1 is configured to be a grippable position.
[0047]
Further, as shown in FIG. 3, an optical unit 52 for condensing laser light is fixed to the upward movement base 48. An optical fiber 53 is connected to the optical unit 52, and laser light emitted from a laser oscillator (not shown) is propagated to the optical unit 52, and passes through the optical unit 52 to connect the flexible tube 1 and the tip component 2. The abutting part is irradiated.
[0048]
The upper movement base 48 is guided by a pair of upper linear guides 55 provided on the vertical base 54, and is in a direction perpendicular to the rotation axes of the holder 8 and the rotary chuck 15 (C direction D direction shown in FIG. 3). It is movable.
[0049]
The upward movement base 48 is screwed with an upper ball screw 57 supported along a C direction (D direction) shown in FIG. 3 by a pair of support plates 54a of the vertical base 54. One end of the upper ball screw 57 is connected to an upward movement motor 56 supported by a vertical base 54, and the upward movement base 48 can move in the C direction or the D direction by the rotation of the upward movement motor 56. It is configured.
[0050]
A tip component supply mechanism 59 for supplying the tip component 2 is provided at the same height as the holder 8 and within the movement range along the C direction of the gripping chuck 34 as shown in FIG. ing.
[0051]
The tip component supply mechanism 59 is supplied with a tip component 2 by a component feeder such as a parts feeder (not shown), and the supply height is the same as that of the holder 8 and the insertion hole 10. It has become.
[0052]
The welding joint apparatus according to the first embodiment includes a control device 60 as a control unit that controls the operation of each of the above-described constituent elements in the order of operations described below.
[0053]
(Function)
Next, the effect | action of the welding joining apparatus of this Embodiment 1 mentioned above is demonstrated.
[0054]
First, the upward movement base 48 is moved in the direction C by the rotational drive of the upward movement motor 56, and is stopped at a position where the gripping chuck 34 is positioned vertically above the tip part supply mechanism 59. The tip component 2 is supplied to the tip component supply mechanism 59 in advance.
[0055]
Next, the gripping chuck 34 is driven downward by the cylinder 50, and the gripping chuck 34 is moved to the lower end position so that the tip part 2 can be gripped by the V groove 35 of the claw 36 attached to the gripping chuck 34. After the gripping chuck 34 is closed and the tip part 2 is gripped, the gripping chuck 34 is driven up by the cylinder 50, and the gripping chuck 34 is moved to the upper end position.
[0056]
Next, the upward movement motor 56 is driven to move the upward movement base 48 in the direction D, and the upward movement base 48 is moved at a position where the gripping chuck 34 that grips the tip part 2 is positioned vertically above the holder 8. Stop.
[0057]
Next, when the gripping chuck 34 is driven downward by the cylinder 50 and the gripping chuck 34 is moved to the lower end position, the tip part 2 gripped by the gripping chuck 34 becomes the same height as the insertion hole 10 of the holder 8.
[0058]
Next, when the moving motor 30 is driven to move the holder 8 in the B direction, first, the cored bar 11 provided in the holder 8 is inserted into the inner diameter of the tip part 2. When the holder 8 is further moved in the B direction, the outer peripheral portion of the tip part 2 is inserted into the insertion hole 10 of the holder 8, and the tip part 2 is held in the holder 8 even when the gripping chuck 34 is opened.
[0059]
On the other hand, the flexible tube 1 welded and joined to the tip part 2 is held by a pair of feed rollers 32 and is fed in the A direction through the hollow hole 17 of the rotary chuck 15 by a feed operation by its rotational drive. The flexible tube 1 that has passed through the rotary chuck 15 is detected by the penetration detection sensor 33. The feed operation of the feed roller 32 is stopped under the control of the control device 60 based on the detection signal of the penetration detection sensor 33.
[0060]
Next, with the gripping chuck 34 released from the gripping of the tip part 2 as described above being held at the lower end position, the moving motor 30 is driven to move the rotary chuck 15 in the A direction, and the gripping chuck The moving motor 30 is stopped at a position where the flexible tube 1 penetrating the rotary chuck 15 can be gripped by 34.
[0061]
Then, the gripping chuck 34 is closed, and the flexible tube 1 is gripped by the V groove 35 of the claw 36. In this state, the moving motor 30 is driven to move the holder 8 in the B direction so that the tip part 2 held by the holder 8 approaches the flexible tube 1 gripped by the gripping chuck 34. .
[0062]
Then, first, the core metal 11 is inserted into the inner periphery of the flexible tube 1. When the tip part 2 is further moved in the B direction together with the holder 8, the tip of the flexible tube 1 is inserted into the cylindrical part of the tip part 2 and abuts against the inner wall thereof. When the movement of the tip part 2 is continued as it is, the tip part 2 is pushed by the flexibility 1 and the tip of the tip part 2 abuts against the end surface of the cored bar holder 12.
[0063]
When the holder 8 continues to move, force in the B direction is applied to the gripping chuck 34, and the gripping chuck 34 is guided by the guide 40 and moves in the B direction with respect to the upper and lower bases 39.
[0064]
Then, the detection dog 42 on the moving plate 38 moves in the B direction in conjunction with the gripping chuck 34, and the shielding plate 42a blocks the transmitted light of the light transmission type sensor 45, so that the transmission type sensor 45 operates and contacts. An output signal indicating the state is sent to the control device 60. Thereby, the contact state of the flexible tube 1 and the tip part 2 can be detected.
[0065]
In this way, when the contact state between the flexible tube 1 and the tip part 2 is detected, the control motor 60 stops the movement motor 30 and stops the gripping chuck 34.
[0066]
Next, the flexible tube 1 is gripped by the rotating chuck 15. At this time, since the flexible tube 1 is abutted against the tip component 2 by a weak spring force generated by the tension spring 47 of the contact detection member 37, the assembled state of the flexible tube 1 and the tip component 2 is as follows. There will be no bent state where the axes of each other are displaced.
[0067]
After gripping the flexible tube 1 with the rotating chuck 15, the gripping chuck 34 is opened to release the gripping of the flexible tube 1, and the gripping chuck 34 is driven up by the cylinder 50.
[0068]
Next, the upward movement motor 56 is driven to move the upward movement base 48 in the direction C so that the optical part 52 is positioned vertically above the tip part 2 to which the flexible tube 1 is assembled. Thereafter, the upward movement base 48 is stopped.
[0069]
And the motor 20 for rotation is driven, the holder 8 and the rotation chuck | zipper 15 are rotated synchronously, a laser beam is radiate | emitted from the optical part 52, and the flexible tube 1 and the front-end | tip component 2 are weld-joined.
[0070]
(effect)
According to the first embodiment Yes The flexible tube 1 and the tip part 2 are connected to each other with a center axis. Song Since it can be assembled and held without being bent, it can be prevented from being bent into a "<" shape after welding by laser light irradiation, and a good bonded state can be obtained.
[0071]
(Embodiment 2)
(Constitution)
Since the structure of the welding joint apparatus in this Embodiment 2 is the same as Embodiment 1 mentioned above, the description is abbreviate | omitted.
[0072]
FIG. 8 is a schematic view showing a state in which the flexible tube 1 and the tip part 2 are not properly assembled in the second embodiment.
[0073]
FIG. 8 shows that the distal end of the flexible tube 1 is not connected to the distal end component 2 due to a defective component that is not stepped to be inserted into the cylindrical portion 2a of the distal end component 2 at the distal end portion of the flexible tube 1. It shows the assembled state without being inserted.
[0074]
(Function)
In the second embodiment, when the movable table 27 is moved by driving the moving motor 30 in order to assemble the flexible tube 1 to the tip component 2, the flexible tube 1 is flexible due to defective components of the flexible tube 1. Since the distal end portion of the sex tube 1 is not inserted into the cylindrical portion of the distal end component 2, the moving amount of the moving table 27 is shorter than the normal assembly as in Embodiment 1 by a dimension L. The contact state between the flexible tube 1 and the tip component 2 is detected by the contact detection member 37.
[0075]
In this case, since the movement amount of the moving table 27 can be detected by the encoder 31 which is a movement amount detecting means built in the moving motor 30, the movement amount at the time of assembly failure and the normal time set in advance are set. By calculating and grasping the difference from the movement amount by the control device 60, it is possible to determine the assembly failure between the flexible tube 1 and the tip part 2.
[0076]
Further, even if the assembly operation of the flexible tube 1 is performed in a state in which the tip part 2 is not held by the holder 8 due to a supply error of the tip part 2, the moving table 27 is moved more than the tip part 2 than in normal assembly. Therefore, the amount of movement is detected by the encoder 31, and the control device 60 obtains a difference from the amount of movement in the normal state. Assembling failure state between the tip part 2 and the tip part 2 can be determined.
[0077]
(effect)
According to the second embodiment, since it is possible to determine an assembly failure between the flexible tube 1 and the tip part 2, unnecessary laser light irradiation due to erroneous detection of the contact state is prevented, and the flexible tube 1. In addition, it is possible to prevent a problem that the tip part 2 and further the holder 8 are melted by laser beam irradiation.
[0078]
【The invention's effect】
According to the first and second aspects of the present invention, the tip part and the flexible tube are held without bending in a “<” shape, and the tip part and the flexible tube are welded by laser irradiation. It is possible to provide a welded apparatus for flexible pipes that can be joined well.
[0079]
According to the third aspect of the present invention, it can be determined that the assembly failure between the flexible tube and the tip part has occurred, and the occurrence of defective products due to the assembly failure between the flexible tube and the tip part has not occurred. It is possible to provide a welded joint device for a flexible tube that can be prevented.
[Brief description of the drawings]
FIG. 1 shows a welded joint by a flexible pipe welding joint apparatus according to a first embodiment of the present invention. Possible It is the schematic which shows a flexible tube and tip components.
FIG. 2 is a front view showing an outline of a welding joint apparatus according to Embodiment 1 of the present invention.
FIG. 3 is a left side view illustrating the outline of the welding joint apparatus according to Embodiment 1 of the present invention.
FIG. 4 is a partial cross-sectional view showing a flexible tube, a tip part, and a holder of the welding joint device according to Embodiment 1 of the present invention.
FIG. 5 is a front view of the gripping chuck and contact detection member of the flexible tube according to the first embodiment of the present invention.
FIG. 6 is a left side view of the gripping chuck and contact detection member of the flexible tube according to the first embodiment of the present invention.
FIG. 7 is a right side view of the gripping chuck and contact detection member of the flexible tube according to the first embodiment of the present invention.
FIG. 8 is a schematic view showing a state of poor assembly between the flexible tube and the tip part in the second embodiment of the present invention.
FIG. 9 is an explanatory view showing an assembled state of a conventional flexible tube and a tip part.
FIG. 10 is a schematic plan view of a conventional laser welding apparatus.

Claims (3)

In welding device flexible tube of metal wire is brought into contact with the flexible tube and the distal end metal parts formed by coiled welded joint by laser irradiation,
A rotatable rotary chuck having a hollow hole for gripping and releasing the flexible tube; a holder arranged to be coaxial with the rotation center of the rotary chuck and holding a tip metal part; and a rotatable holder
A gripping chuck that is disposed in a region between the rotary chuck and the holder so as to be able to advance and retract, and grips the tip metal part and grips a flexible tube that penetrates a hollow hole of the rotary chuck;
A moving means for guiding the holder holding the tip metal part in the direction of the rotation axis of the rotary chuck, approaching the gripping chuck holding the flexible pipe, and attaching the tip of the flexible pipe to the tip metal part;
A contact detecting means for detecting contact between the flexible tube and the tip metal component by utilizing a force acting on the gripping chuck when the tip metal component and the flexible tube tip are mounted; Control means for performing movement control of the moving means and gripping control of the rotary chuck with respect to the flexible tube based on a detection signal of the detecting means;
A welded joining apparatus for flexible tubes, characterized by comprising: In welding device flexible tube of metal wire is brought into contact with the flexible tube and the distal end metal parts formed by coiled welded joint by laser irradiation,
A rotatable rotary chuck having a hollow hole for gripping and releasing the flexible tube; a holder arranged to be coaxial with the rotation center of the rotary chuck and holding a tip metal part; and a rotatable holder
A gripping chuck that is disposed in a region between the rotary chuck and the holder so as to be able to advance and retract, and grips the tip metal part and grips a flexible tube that penetrates a hollow hole of the rotary chuck;
A moving means for guiding the holder holding the tip metal part in the direction of the rotation axis of the rotary chuck, approaching the gripping chuck holding the flexible pipe, and attaching the tip of the flexible pipe to the tip metal part;
A light transmissive type that operates by displacement of a shielding plate portion using a force acting on the gripping chuck when the tip metal component and the flexible tube tip are mounted, and detects contact between the flexible tube and the tip metal component. A sensor,
Based on the detection signal of the light transmission type sensor, control means for performing movement control of the moving means and gripping control for the flexible tube of the rotary chuck;
A welded joining apparatus for flexible tubes, characterized by comprising:   The moving means includes a moving amount detecting means for detecting a moving amount of the moving means until detection of contact between the flexible tube and the tip metal part, and the control means detects movement detected by the moving amount detecting means. 3. The flexible tube according to claim 1, wherein the assembly failure of the flexible tube and the tip metal part is determined by grasping a difference between the amount and a preset set amount. 4. Welding equipment.

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