JP4036565B2 - Tube connection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube connection device to surely connect tubes. SOLUTION: In this tube connection device, tubes held by a first tube holder 1 and a second tube holder 2 are heated, melted and cut by a heated cutting plate 6, and different cut surfaces of the tubes are welded and connected to each other, and a holder to fit the cutting plate 6 in the direction orthogonal to the tubes held by the tube holder 1 and the second tube holder 2 is provided, and the holder slides on a reference surface formed on the first tube holder 1 or the second tube holder 2 so that the holder is orthogonal to the tubes.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tube connecting apparatus that melts and cuts a flexible tube and welds and connects the cut surfaces.
[0002]
[Prior art]
The tube connecting device is used to connect a transfer tube connected to the abdominal cavity and a tube connected to the dialysis bag, for example, to provide dialysate into the abdominal cavity of a peritoneal dialysis patient.
Therefore, an example of the connection operation of the tube connecting device will be briefly described. For example, as shown in FIG. 18, the two tubes 7 and 8 are fixed clamps 311 and 313 of the first tube holder 301 and the second tube holder 302, and movable clamps 312 and 314 that abut against and separate from the clamps. And clamped in two places. At this time, the tubes 7 and 8 are clamped to have a flat shape and the inside of the tube is closed.
Then, a heated cutting plate (hereinafter referred to as “wafer”) 6 rises between the first tube holder 1 and the second tube holder 2 and melts and cuts the orthogonal tubes 7 and 8.
[0003]
Thereafter, in the first tube holder 301, a pair of semicircular rotor pieces 303 and 304 overlap to form a clamp rotor 305, and one of the cuts cut as shown in FIG. 19 by the rotation of the clamp rotor 305. The tubes 7 a and 8 a are reversed so as to slide on the wafer 6.
Then, when the cut surfaces of different tubes (7a and 8b, 8a and 7b) are located on the same axis, the wafer 6 is retracted and welded so as to press the cut surfaces of the two tubes together, as shown in FIG. Tubes 9 and 10 joined alternately are formed.
[0004]
By the way, in this tube connecting apparatus, as described above, the tube is inverted by the clamp rotor 305 including the pair of rotor pieces 303 and 304. FIG. 21 is a view showing the clamp rotor 305 loaded in the first tube holder 301.
The clamp rotor 305 is composed of a pair of semicircular rotor pieces 303 and 304. A tooth shape is formed on the circumference of the rotor rotor 305, and one piece when the rotor pieces 303 and 304 are overlapped with each other. It is comprised so that the gear of this may be made. Further, at the center of the clamp rotor 305, that is, the center of the contact surface between the rotor pieces 303 and 304, U-shaped grooves 331 and 332 each having a depth into which one tube enters, and a shallow groove for crushing and clamping the tube. The closed portions 333 and 334 are formed.
[0005]
Such rotor pieces 303 and 304 are loaded in the rotor loading portions 323 and 324 formed in the blocks 321 and 322 forming the fixed clamp 311 and the movable clamp 312, respectively.
On the other hand, a drive gear 306 that meshes with the rotor piece 303 (304) is rotatably loaded in a gear loading portion 325 that is connected to the rotor loading portion 323, and is connected to a motor shaft of a drive motor (not shown).
Then, for example, as shown in FIG. 18, when the tubes 7 and 8 are clamped and cut, a drive motor (not shown) is driven at a predetermined timing to rotate the drive gear 306. As a result, the clamp rotor 305 rotates in the first tube holder 301, the positions of the rotor pieces 303 and 304 are switched, and the cut tubes are alternately arranged.
[0006]
[Problems to be solved by the invention]
As shown in FIG. 19, the tube connecting device using such a clamp rotor 305 has the cut surfaces of the cut tubes 7a and 8a reversed and cuts different tubes (7a and 8b, 8a and 7b). The faces are connected. Therefore, the cut surfaces of the tubes 7a, 7b, 8a, 8b need to be all orthogonal. If the cut surface is inclined, a gap is created when the cut surfaces of different tubes (7a and 8b, 8a and 7b) are not parallel to each other when the tubes 7a and 8a are reversed. This is because connection failure such as connection strength cannot be ensured.
Further, since the thickness of the wafer 6 is as thin as several hundred μ and does not have a heat storage capability, the heat of the wafer 6 is taken away by melting of the tubes 7 and 8 and evaporation of the liquid remaining in the tubes 7 and 8 at the time of cutting. Mae. Therefore, if the tubes 7 and 8 are cut by moving the wafer 6 linearly in the vertical direction as in the prior art, since the cutting is performed only on a part of the wafer 6, the temperature of the part is significantly reduced. And it becomes impossible to make the cut surface of the tubes 7 and 8 into a sufficient molten state, and subsequent welding will become inadequate.
[0007]
Then, an object of this invention is to provide the tube connection apparatus which connects a tube reliably.
[0008]
[Means for Solving the Problems]
In the tube connecting device according to the present invention, a plurality of flexible tubes are held by a first tube holder and a second tube holder, and the tube is interposed between the first tube holder and the second tube holder. In the tube connection device for welding and connecting different tube cut surfaces, the tube is held by the first tube holder and the second tube holder after being cut by heating and melting with the heated cutting plate (6). The cutting plate is loaded in a direction orthogonal to the tube, and has a holder that moves up and down in the orthogonal direction to cut the tube, and the holder includes a fixing plate that clamps the loaded cutting plate from both sides, and Opening and closing plate And a base plate for fixing the fixing plate The opening / closing plate so that the opening / closing plate opens and closes the upper side with respect to the fixed plate. The base plate And is provided with a convex line that opens the open / close plate by being applied with an operation rod before loading the cutting plate into the holder. It is characterized by that.
Therefore, loading of a new cutting plate into the holder and replacement by pushing out a used cutting plate in the holder at the same time are performed each time, but the opening / closing plate is opened with a pressing piece in advance during the loading and replacement. Since the gap with the fixed plate is opened, the cutting plate can be loaded and replaced smoothly.
[0009]
The tube connecting device according to the present invention is the above-described device, wherein both of the cutting plates are such that the insertion side cutting plate inserted into the holder and the discharge side cutting plate loaded in the holder overlap each other. It has a positioning spring which urges and positions to the fixed plate side.
Therefore, both cutting plates urged to the fixed plate side by the positioning spring are loaded with the discharge-side cutting plates on the path of the insertion-side cutting plate and the ends overlap each other. Extrusion and replacement with the insertion-side cutting plate can be performed reliably.
[0010]
In the tube connecting device according to the present invention, in the above-described device, the guide unit pushes out one cutting plate from a cassette including the plurality of cutting plates and loads the cutting plate along the guide groove, and the guiding unit A retraction preventing spring disposed by fixing a leaf spring obtained by folding the front end side in the feed direction of the cut plate to be fed to the holder so that the front end portion overlaps the path of the cut plate The retraction preventing spring is bent by the cutting plate when the cutting plate is inserted to open a path, and is elastically restored after the cutting plate passes to cut off the retreating path of the cutting plate.
[0011]
In the tube connecting device according to the present invention, a plurality of flexible tubes are held by a first tube holder and a second tube holder, and the tube is interposed between the first tube holder and the second tube holder. A device for welding and connecting different tube cut surfaces to each other, the tube being held by the first tube holder and the second tube holder A holder for loading the cutting plate in an orthogonal direction, and the holder slides on a reference surface formed on the first tube holder or the second tube holder so as to be orthogonal to the tube. It is characterized by.
Therefore, when the holder slides on the reference surface, the cutting plate loaded in the holder can surely move on an orthogonal plane orthogonal to the tube without shaking when the tube is connected.
Therefore, the cut surfaces of the tubes cut by the cutting plate are all equally orthogonal, and the different tube cut surfaces are accurately matched to each other so that a reliable connection can be made.
[0012]
In the tube connecting device according to the present invention, in the above device, the holder is pivotally supported so as to swing on an orthogonal plane orthogonal to the tube, and slides on the reference surface to swing. It is characterized by moving.
Therefore, the cutting plate is advanced by the swinging holder so as to slide obliquely with respect to the tube.
Therefore, the cutting plate itself is thin and does not have a heat storage capacity, but the cutting portion of the cutting plate applied to the tube is shifted in the process of cutting, and heat radiation of the cutting portion in the cutting plate is suppressed, and the cutting is melted and cut. A sufficient amount of heat is maintained.
[0013]
In the tube connecting device according to the present invention, a plurality of flexible tubes are held by a first tube holder and a second tube holder, and the tube is interposed between the first tube holder and the second tube holder. A device for welding and connecting different tube cut surfaces to each other, the tube being held by the first tube holder and the second tube holder On the other hand, the cutting plate is loaded in the orthogonal direction, and the cutting plate is moved up and down in the orthogonal direction to cut the tube, and one cutting plate is pushed out from the cassette having the plurality of cutting plates along the guide groove. And a guide means for loading the holder.
Therefore, since the guide means loads a new cutting plate into the holder and replaces the used cutting plate at the same time, the tube can be cut with a hygienic cutting plate.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a tube connecting device according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an internal mechanism of the tube connecting device, and FIG. 2 is a plan view thereof (excluding movable clamps 12 and 82). This tube connecting apparatus mainly includes a tube holding mechanism for holding a tube, a cutting mechanism for moving a cutting plate (hereinafter referred to as “wafer”) 6 relative to the tube, and a new wafer 6 for each tube connecting operation. And a wafer feeding mechanism. First, the configuration of the tube holding mechanism will be described.
The tube holding mechanism holds and sandwiches the two tubes 7 and 8 stacked one above the other in two places, and after cutting, the tube on one side is turned upside down and the cut surfaces are pressed and connected. The main structure is the 1st tube holder 1 and the 2nd tube holder 2, and it is each comprised from the fixed clamps 11 and 81 and the movable clamps 12 and 82 connected with this by the pin joint. The fixed clamps 11 and 81 and the movable clamps 12 and 82 correspond to holding members described in the claims.
[0015]
The first tube holder 1 and the second tube holder 2 are arranged in parallel with a constant interval, and the second tube holder 2 is fixed to the base 210, while the first tube holder 1 It is slidably provided so that the distance from the tube holder 2 can be adjusted. Between them, a wafer holder 140 forming a cutting mechanism is disposed, and the wafer 6 is moved in a direction orthogonal to the tubes 7 and 8 held by the first tube holder 1 and the second tube holder 2. It is configured.
A clamp rotor for inverting the tube cut by the wafer 6 is provided in the first tube holder 1. FIG. 3 is a perspective view showing the clamp rotor, and FIG. 4 is a sectional view in the A direction of the rotor piece 31 (32) shown in FIG.
[0016]
The clamp rotor 30 is composed of a pair of rotor pieces 31 and 32. The rotor pieces 31 and 32 have a rotationally symmetric shape formed by halving a gear. Accordingly, the rotor pieces 31 and 32 are of the same shape, both semicircular, and form a single clamp rotor 30 by overlapping the half surfaces.
Specifically, the clamp rotor 30 includes tube holding portions 33 and 33 for holding the tube at the center, flange portions 34 and 34 projecting radially from the tube holding portions 33 and 33, and flange portions 34 and 34. The outer rim 35 is formed with rotor gears 36 and 36 and lock grooves 37a, 37b, 37a and 37b.
[0017]
The tube holding portions 33, 33 are formed with blocking portions 33b, 33b in which the holding groove 33a and the tip of the cylinder are inclined in the center direction and become narrow. The intervals between the closed portions 33b and 33b of both the rotor pieces 31 and 32 are formed so that the two tubes that have been crushed and overlapped therewith have a flat shape so that the inside of the tube tube is closed. .
Further, the lock grooves 37a and 37a and the lock grooves 37b and 37b formed in the rim portions 35 and 35 are formed at the same position in both the rotor pieces 31 and 32. This is because the lock grooves 37 a and 37 a correspond to the lock means of the fixed clamp 11 and the lock grooves 37 b and 37 b correspond to the lock means provided in the movable clamp 12. The locking means will be described later. The lock grooves 37a, 37b, 37a, and 37b are all formed by two projecting walls so as to have a predetermined groove width.
[0018]
Next, the fixed clamp 11 and the movable clamp 12 of the first tube holder 1 loaded with the rotor pieces 31 and 32 will be described.
The fixed clamp 11 is formed by fixing a body cover 14 (see FIG. 1) to the fixed clamp body 13 shown in FIG. The fixed clamp body 13 is provided with an outer frame 16 as shown in the figure on the side wall 15, and the body cover 14 is applied to the outer frame 16 and screwed. The fixed clamp 11 has a hollow shape with an open upper surface, and the rotor piece 31 (32) described above is loaded therein. Further, the stepping motor 3 (see FIG. 2) is fixed to the body cover 14, and a gear train for transmitting the rotation output to the rotor piece 31 (32) is provided in the fixed clamp 11.
[0019]
The fixed clamp body 13 is formed with a single support bracket 17 and a bifurcated support bracket 18 at both upper corners. The single support bracket 17 is for pin joint with the movable clamp 12, and a bearing 28 is pivotally supported between the bifurcated support bracket 18.
In addition, the upper side of the side wall 33 of the fixed clamp body 13 and the upper side (not shown) of the body cover 14 are rotational support grooves cut into a semicircular shape so as to support the tube holding portion 33 of the rotor piece 31 (32). 19 is formed. Rollers 20, 20, 20 that rotatably support the rotor piece 31 (32) are pivotally supported on the side wall 33 on the same center circumference as the rotation support groove 19. The three rollers 20 are symmetrically arranged on both sides with an interval of 60 ° with respect to the central roller 20.
Further, a positioning protrusion 21 is formed on the fixed clamp body 13 so as to protrude from the upper side of the side wall 15.
[0020]
The fixed clamp body 13 is formed so that the first tube holder 1 can move in parallel with the second tube holder 2 as described above. Here, FIG. 6 is a plan view of the fixed clamp body 13.
The fixed clamp body 13 has a slide tube 22 projecting perpendicularly to the side wall 15, and a guide roller 23 is rotatably supported in the axial direction of the slide tube 22. The slide tube 22 is fitted into a guide rod protruding from the second tube holder 2 described later, and the guide roller 23 is disposed in a guide groove 29a of a guide block 29 fixed to the base 210 shown in FIG. Has been.
Therefore, the fixed clamp 11 of the first tube holder 1 is attached in a state where the fixed clamp body 13 is supported by the slide tube 22 and the guide roller 23 and floats from the base 210.
[0021]
Further, as shown in FIG. 6, the fixed clamp body 13 has a pressing arm 24 protruding from the second tube holder 2 side, and a roller bearing 25 is pivotally supported at the tip.
The movable fixed clamp 11 supported by the slide tube 22 and the guide roller 23 is provided with a spring 24 between the support wall 181 fixed to the base block 10 shown in FIG. It is always urged toward the second tube holder 2 side.
Therefore, the roller bearing 25 at the tip of the pressing arm 24 is always in contact with a drive cam in the second tube holder 2 described later, and the cam surface can roll.
[0022]
Next, the body cover 14 of the fixed clamp 11 is provided with a tube guide 40 (see FIG. 1) for accurately arranging the tubes. FIG. 7 is a perspective view of the tube guide 40 showing the attachment surface side to the body cover 14.
The tube guide 40 is attached to a guide body 41 having a groove in a state where a pair of guide claws 42 and 42 are urged inward by springs 43 and 43.
That is, a curved groove 41a for positioning the tube is formed in the center of the guide body 41, and the guide claws 42, 42 arranged so as to sandwich the groove 41a are moved to the groove 46a side by the outer springs 43, 43. It is energized and is attached so as to be movable in the energizing direction. Note that the pair of left and right guide claws 42, 42 shown in the figure are of the same type, and are arranged reversely so as to share parts.
[0023]
8 is an exploded perspective view showing the movable clamp 12 of the first tube holder 1, and is a view seen from the second tube holder 2 side. The movable clamp 12 has a body cover 52 attached to a movable clamp body 51 shown in the figure, and is hollow like the fixed clamp 11, and a rotor piece 31 (32) is loaded therein.
The movable clamp body 51 and the body cover 52 are formed with rotation support grooves 53 and 54 that are cut out in a semicircular shape at corresponding positions. Rollers 55, 55, 55 for rotating and supporting the rotor piece 31 (32) are supported on the body cover 52 on the circumference of the same center as the rotation support groove 54. The three rollers 55 are symmetrically arranged with the other two rollers 55, 55 at an interval of 60 ° with respect to the central roller 55. Further, the movable clamp body 51 is provided with bifurcated support brackets 56 and 57 for pin joints at both ends thereof.
[0024]
Next, FIG. 9 is a cross-sectional view showing the first tube holder 1. Specifically, the fixed clamp 11 is a view showing the fixed clamp body 13 with the body cover 14 removed, and the movable clamp 12 is a view showing the cross section of the movable clamp body 51 in a simplified manner.
In the first tube holder 1, the fixed clamp 11 and the movable clamp 12 are pin-coupled by the support brackets 17 and 56, and the movable clamp 12 is overlapped as illustrated by swinging, and as shown in FIG. 1. Configured to open. Then, a buckle 125 (see FIG. 8) is pin-coupled to the support bracket 57 formed at the swinging end of the movable clamp 12, and its jaw 127 is hooked on the bearing 28 of the fixed clamp 11, and is in the state shown in the figure. It is configured to be locked with.
[0025]
In the clamped state of the first tube holder 1 shown in FIG. 9, the arranged tubes 7 and 8 (see FIG. 2) are held up and down by the holding grooves 33a and 33a of the rotor pieces 31 and 32, and the closed portions 33b and 33b can be clamped symmetrically as shown in the figure. In addition, the clamp rotor 30 shown in figure represents the BB cross section of the rotor pieces 31 and 32 shown in FIG.
The rotor pieces 31 and 32 are loaded so that the rollers 20... 55 enter between the tube holding portions 33 and 33 and the rim portions 35 and 35. Accordingly, in the illustrated clamping state, the rotor pieces 31 and 32 constitute one clamp rotor 30 (see FIG. 3), and the rollers 20... 55 are equally spaced (60 ° intervals) on the same circumference. Located in. In addition, this clamp rotor 30 is arrange | positioned in the direction where the obstruction | occlusion part 33b, 33b protrudes to the 2nd tube holder 2 side.
Further, in the fixed clamp 11, the stepping motor 3 (see FIG. 2) is fixed to the body cover 14, and the drive gear 61 is attached to the motor shaft 3a that has entered the through hole 32a (see FIG. 1). 61 is engaged with the access gear 62 and the drive gear 63, and the drive gear 63 is engaged with the rotor gear 36 of the clamp rotor 30.
[0026]
When the fixed clamp 11 and the movable clamp 12 are not in the state of holding the tube or in the non-clamped state, the loaded rotor pieces 31 and 32 are shown in FIG. A locking means is provided for positioning so as not to deviate from the position shown in FIG. Any of the locking means fits into the locking grooves 37a and 37b formed in the rotor pieces 31 and 32 to restrict the movement of the rotor pieces 31 and 32.
First, the locking means on the fixed clamp 11 side will be described. As shown in FIG. 9, the locking means includes a slide plate 65, a crank plate 66 and a spring 67. The slide plate 65 has two oval slide holes 65 a and 65 b formed in parallel, and is fitted and supported by pins 68 a and 68 b erected on the side wall 15 of the fixed clamp body 13.
[0027]
Further, an engaging portion 65p projecting in parallel with the longitudinal direction of the slide holes 65a and 65b is formed at the tip, and a hook portion 65q bent vertically is provided at the other end. The slide plate 65 is constantly urged toward the center of the clamp rotor 30 by a spring 67 hung on the pin 68a and the hook portion 65q.
On the other hand, the crank plate 66 is pivotally supported by a pin 68b at its substantially central portion, and a linear tip is disposed on the urging direction side with respect to the hooking portion 65q of the slide plate 65, and the other tip is a letter shape. Is disposed in a window portion 26 formed in the fixed clamp body 13.
[0028]
Next, in the locking means on the movable clamp 12 side, an engagement piece 72 having an engagement protrusion that fits into the lock groove 37 of the clamp rotor 30 is fixed to a leaf spring 71 bent into a dogleg shape. The leaf spring 71 has a support ring 71 a formed at one end thereof and is fitted into a pin 58 standing on the movable clamp body 51. The other end of the leaf spring 71 is applied to the inner wall of the movable clamp body 51 so that the inner wall receives an elastic force acting on the leaf spring 71. At this time, the engagement piece 72 is urged toward the center of the clamp rotor 30 by the leaf spring 71.
By the way, the lock grooves 37a and 37b respectively formed in the rotor pieces 31 and 32 are provided at positions corresponding to the engaging portions 65p and the engaging pieces 72 in the clamped state shown in FIG. 9, and the rotor pieces 31 and 32 are uniquely defined. Is configured to be positioned. In addition, the lock grooves 37a and 37b are surfaces whose inner wall surfaces are substantially parallel, and one of the engaging portions 65p and the engaging piece 72 is a quadrangular protruding piece that enters between the locking grooves 65a and 37b.
[0029]
Then, the 2nd tube holder 2 is demonstrated concretely. Here, FIG. 10 is an external perspective view of the fixing clamp 81 of the second tube holder 2, particularly a view seen from the first tube holder 1 side. FIG. 11 is a perspective view showing a fixed clamp body of the second tube holder 2.
In the fixed clamp 81, a hollow fixed clamp body 83 is closed from the outside by a body cover 84 as in the first tube holder 1. That is, the fixed clamp body 83 is provided with an outer frame 86 as shown in the figure on the side wall 85, and the body cover 84 is applied to the outer frame 86 and screwed.
The fixed clamp body 83 is formed with a single support bracket 87 and a bifurcated support bracket 88 at both upper corners. The single support bracket 87 is for pin joint with the movable clamp 82, and the bifurcated support bracket 88 supports the bearing 90 therebetween. Further, a positioning protrusion 89 is formed on the fixed clamp body 83 so as to protrude from the upper side of the side wall 85.
[0030]
Further, as shown in FIG. 10, a guide rod 91 that supports the slide tube 22 (see FIG. 5) formed in the first tube holder 1 is vertically projected on the fixed clamp body 83, Further, the side wall 85 is largely cut so that an internal drive cam 92 appears.
The drive cam 92 is formed integrally with the reduction gear 95 and is pivotally supported in the fixed clamp body 83 at the illustrated position. The drive cam 92 is formed by integrating a circular slide cam 93 and an eccentric cutting cam 94. The slide cam 93 is formed with a slide cam surface 93a having an end surface inclined to change the height in the axial direction, and the cutting cam 94 is formed with an eccentric cam surface 94a formed by the outer peripheral side surface thereof. Yes.
On the other hand, the stepping motor 4 (see FIG. 2) is fixed to the body cover 84, and as shown in FIG. A reduction gear 95 is engaged with the reduction gear 95.
[0031]
The fixed clamp body 83 is provided with a tube guide 100 as shown in FIG. This tube guide 100 has guide claws 101, 101 protruding as a support means for arranging the tubes side by side through an outer frame 86 forming the upper surface, and is integrally formed with the plunger case 102 in the fixed clamp body 83. is there.
Protrusions 101a and 101a are formed on the inner ends of the guide claws 101 and 101 so as to prevent the tube from coming off. The holding groove 103 between the guide claws 101 and 101 is continuous on the same surface as the holding groove 98 formed in the fixed clamp body 83 as shown in FIG. On the other hand, as shown in FIG. 11, the plunger case 102 forms a container in which the stepped plunger 104 can slide up and down, and the bottom surface is removed so that the plunger case 102 is placed on a support plate 99 protruding from the fixed clamp body 83. Is fixed.
[0032]
The plunger 104 is urged upward by a spring 105 provided between the plunger 104 and the support plate 99, and a tip penetrating the bottom surface of the holding groove 103 of the tube guide protrudes. The plunger 104 has a magnet 106 embedded in the lowermost part thereof, and the position of the magnet 106, that is, the height of the plunger 104 is detected by a tube holding detection sensor (not shown) fixed to the body cover 84 side. It is configured. The presence or absence of the tube is performed by detecting the height of the plunger 104.
Furthermore, an O-ring 107 is fitted to the plunger 104 so that the liquid that has entered the through hole in the bottom surface of the holding groove 103 does not penetrate into the plunger case 102.
[0033]
Next, FIG. 12 is a perspective view showing the movable clamp 82 and the buckle 120. The movable clamp 82 is constituted by a hollow movable clamp body 110 that is integrally formed, and bifurcated support brackets 111 and 112 are formed at both ends. Further, the movable clamp body 110 is formed with a U-shaped groove 113 through which the tube passes and a closing portion 114 projecting laterally, and a pressing portion 115 raised so as to lightly hold the tube is formed therebetween. Further, the movable clamp body 110 is formed with a locking wall 116 that is brought into contact with the positioning protrusion 89 of the fixed clamp body 83 on the swing end side (buckle 120 side).
A buckle 120 is pin-coupled to the support bracket 112 of the movable clamp body 110. The buckle 120 is configured to be integrated with the buckle 125 on the first tube holder 1 side shown in FIG. That is, the holding plate 121 of the buckle 120 protrudes greatly on one side (the first tube holder 1 side), and an insertion groove 122 for inserting the insertion portion 126 of the buckle 125 and the pin 129 is formed there. A jaw 123 and a pressing protrusion 124 are formed at the position of the support bracket 112 in the same manner as the buckle 125.
[0034]
Therefore, as shown in FIG. 11, the second tube holder 2 is illustrated in such a manner that the movable clamp 82 is pin-coupled to the fixed clamp body 83 by the support brackets 87 and 111, and the movable clamp 82 swings. And are configured to open as shown in FIG.
The jaw 123 of the buckle 120 pin-coupled to the swinging end of the movable clamp 82 is hung on the bearing 90 and locked in the clamped state shown in the drawing.
In the clamped state of the first tube holder 2 shown in FIG. 11, the arranged tubes 7 and 8 (see FIG. 2) are vertically symmetrical by the holding groove 98 of the fixed clamp body 83 and the closing portion 114 of the movable clamp body 110. It is configured so that it can be clamped.
[0035]
The first tube holder 1 and the second tube holder 2 as described above are arranged in parallel on the base 210 as shown in FIGS. 1 and 2. Specifically, the fixed clamp body 83 of the second tube holder 2 is directly fixed to the base 210, and the first tube is held on the guide rod 91 (see FIG. 10) protruding from the second tube holder 2. The slide tube 22 provided in the tool 1 is fitted. At this time, both fixed clamps 11 and 81 are parallel. In the first tube holder 1, the fixed clamp 11 is also supported by the guide roller 23, so that the first tube holder 1 is kept parallel to the second tube holder 1 and parallel to the base 210 of the first tube holder 1 itself. Thus, the second tube holder 2 can be moved to adjust the distance.
[0036]
As described above, in the first tube holder 1 supported so as to be movable with respect to the second tube holder 2, the fixed clamp body 13 is constantly urged toward the second tube holder 2 by the spring 131. Therefore, the roller bearing 25 (see FIG. 6) of the pressing arm 24 protruding from the first tube holder 1 abuts on the slide cam 93 of the drive cam 92 provided on the second tube holder 2, and always The cam surface is configured to roll.
And the 1st tube holder 1 and the 2nd tube holder 2 are the movable clamps in the holding grooves 33a and 33a of the rotor piece 31 (32) and the holding groove 98 of the fixed clamp 81 as shown in FIG. A small gap is formed between the two closed portions of the 82 closed portions 114. 13 is a front view showing the first tube holder 1 and the second tube holder 2 from the direction C in FIG.
[0037]
Therefore, the cutting mechanism will be described next. Between the first tube holder 1 and the second tube holder 2 as described above, a wafer holder that holds the wafer 6 and moves it up and down is disposed. 14 and 15 are perspective views showing a wafer holder for holding the wafer 6. FIG. 14 is a view seen from the first tube holder 1 side, and FIG. 15 is a view seen from the second tube holder 2 side.
[0038]
The wafer holder 140 is swingably supported with respect to the guide rod 91 of the second tube holder 2. A base plate 141 having a swing tube 142 fitted into the guide rod 91 is fixed to the fixing plate 143 and the open / close state. Plates 145 are provided on both sides. The fixed plate 143 is fixed to the first tube holder 1 side with respect to the base plate 141, and a groove (not shown) through which the wafer 6 passes is formed between both plates. The fixing plate 143 is formed with misalignment stoppers 143a and 143b that protrude upward at two locations and have a barb that prevents the wafer 6 from deviating upward.
[0039]
The opening / closing plate 145 is pivotally supported at the lower portion, and further biased by a biasing member on the lower side of the pivoting portion, and the upper portion is provided so as to contact / separate, that is, open / close with respect to the fixed plate 143. Yes. The opening / closing plate 145 is provided with electrodes 146a, 146b corresponding to the position of the displacement stop 143a of the fixed plate 143, and is configured to contact and energize the resistor terminal of the wafer 6 loaded in the wafer holder 140. ing. The opening / closing plate 145 is formed with a pressing piece 145b corresponding to the other misalignment stop 143b of the fixed plate 143. Further, a single convex line 145 s is formed on the outer surface of the opening / closing plate 145 in parallel along the entrance direction of the wafer 6.
The base plate 141 is provided with positioning plate springs 147a, 147b, and 147c for positioning the wafer 6 by pressing the wafer 6 against the fixed plate 143 side, and a back-preventing plate so as to overlap the last plate spring 147a. A spring 148 is provided. The positioning plate springs 147a, 147b, and 147c are arranged so as to hold the front and rear three positions approximately in the middle of the height of the wafer 6 loaded in the wafer holder 140, and the receding prevention plate spring 148 passes through the wafer 6 that has passed. A return bar 148a is formed for breaking the backward path.
[0040]
By the way, in order to appropriately cut and connect the tubes, it is necessary to make the wafer 6 orthogonal to the tubes 7 and 8 held by the first tube holder 1 and the second tube holder 2. Must swing without shaking on the orthogonal plane. Therefore, in the present embodiment, the side wall 85 (see FIG. 10) of the fixed clamp body 83 that is directly fixed to the base 210 is used as a reference surface, and the wafer holder 140 slides on the reference surface to perform a swinging operation. ing.
Therefore, in the wafer holder 140, the end surface 142A of the oscillating tube 142, the end surface 151A of the mounting block 151 to which the positioning plate spring 147c is attached, and the end surface 152A of the sliding tube 152 fixed to the distal end portion are on the same plane. Is formed.
[0041]
Such a wafer holder 140 is fitted into the guide rod 91 of the second tube holder 2 together with the first tube holder 1, and a spring 153 disposed between the first tube holder 1 (see FIG. 2). ) To the second tube holder 2 side. Therefore, the end surfaces 142A, 151A, and 152A of the wafer holder 140 are always pressed against the side wall 85 (reference surface) of the fixed clamp body 83. In this state, the wafer 6 loaded in the wafer holder 140 is orthogonal to the tubes 7 and 8.
Further, on the end surfaces 142A, 151A, and 152A side of the wafer holder 140, a roller bearing 155 is pivotally supported on a shaft fixed to the base plate 141. Although not shown, in the wafer holder 140, the roller bearing 155 enters the fixed clamp body 83 (see FIG. 10) and is placed on the top of the eccentric cam surface 94a in the cutting cam surface 94 formed on the drive cam 92. Installed in a state.
[0042]
Next, a wafer feeding mechanism for feeding the wafer 6 into the wafer holder 140 will be described. A plurality of wafers 6 are stored in the wafer cassette 160 shown in FIGS. 1 and 2, and one wafer 6 pushed out on the feed line is moved by a feed piece 161 that moves along the feed line. It is configured to be pushed in the direction of arrow X (see FIG. 2).
The feed piece 161 has a claw portion 161 a formed by a step corresponding to the thickness of the wafer 6 at the tip, and is integrally formed with the slider 162. The slider 162 is slidably supported by a guide rod 171 that is fixed between the support walls 181 and 182 that are fixed on the base 210.
[0043]
Further, male screws 172 suspended in parallel with the guide rods 171 are rotatably supported on the support walls 181 and 182. A female screw holding a ball is formed on a female screw block 163 formed integrally with the slider 162, and a ball screw is configured by screwing on the male screw 172.
A transmission gear 173 is fixed to the male screw 172 at the end on the support wall 182 side. The stepping motor 5 is fixed to the support wall 182 from the outside, and the drive gear 174 fixed to the motor shaft passing through the support wall 182 and the transmission gear 173 are engaged with each other.
[0044]
Further, on the upper surface of the female screw block 163, markers 165 and 166 are provided to which two plate members are attached in an up and down direction. On the other hand, a control board 183 is fixed to the support walls 181 and 182 as shown in FIG. 2, and a standby detection sensor 185 and a feed detection sensor 186 are provided on the control board 183. The standby detection sensor 185 is a sensor that detects the standby position of the feed piece 161 based on the position of the marker 165, and the feed detection sensor 186 is a sensor that detects the feed position of the feed piece 161 based on the position of the marker 165. The markers 166 and 167 are pivotally supported with respect to the female screw block 163 so that the opening degree of the tip which is the detection target portion can be adjusted.
Further, stoppers 175 and 176 for preventing overrun of the slider 162 are fitted to the guide rod 171 so as to be in contact with the support walls 181 and 182, respectively.
[0045]
Further, a support arm 168 protrudes from the lower side of the feed piece 161 on the slider 162, and a pin 169 protrudes further at the tip of the support arm 168. On the other hand, a prismatic beam 191 is stretched in parallel with the guide rod 171 between the support wall 182 and the fixed clamp block 81 of the second tube holder 2. The beam 191 is formed with a rail 192 having a stepped corner, and a prismatic operation rod 195 is placed on the rail 192. The operation rod 195 has a guide groove 195 a formed in the longitudinal direction on the back surface and is fitted to a guide pin 193 projecting from the rail 192.
The tip of the support arm 168 protruding from the slider 162 is the operating rod. 195 The pin 169 at the tip of the support arm 168 is applied to the rear end of the control rod from the side. 195 It is lightly fitted in.
[0046]
Next, the tube connection operation of the tube connection device having the above configuration will be described. The tube connecting device is entirely covered by a cover (not shown) such that the upper portions of the fixed clamps 11 and 81 and the movable clamps 12 and 82 are exposed. Therefore, when the movable clamps 12 and 82 are opened upward as shown in FIG. 1, the upper surfaces of the fixed clamps 11 and 81 appear, and the tubes 7 and 8 can be set. Therefore, the user fits the two tubes 7 and 8 (see FIG. 2) into the tube guides 40 and 100 so as to overlap each other. At this time, the distance between the guide claws 42 and 42 (see FIG. 7) of the tube guide 40 and the guide claws 101 and 101 (see FIG. 11) of the tube guide 100 is adjusted to the outer diameter of the tubes 7 and 8. 7 and 8 are arrange | positioned so that the center axis may overlap up and down.
[0047]
The tubes 7 and 8 fitted in the tube guide 100 are hooked by the protrusions 101a and 101a of the guide claws 101 and 101, and do not come out from there. Therefore, the tube is fitted so as to push down the plunger 104 protruding from the bottom surface of the guide groove 103 by its elastic force (see FIG. 11).
Therefore, when the plunger 104 is pushed downward against the urging force of the spring 105, the movement of the magnet 106 is detected by a sensor (not shown), and the signal is sent to the control side.
[0048]
Subsequently, after setting the tubes 7 and 8, the user closes the movable clamps 12 and 82 with the buckle 120 in the tube connection device in the state shown in FIG. 1. That is, the movable clamps 12 and 82 are overlapped with the fixed clamps 11 and 81, and the tubes 7 and 8 are held up and down by these to clamp them.
Since the buckle 120 is formed integrally with the buckle 125, both the movable clamps 12 and 82 can be closed together by operating with the gripping plate 121 (see FIG. 12). Then, when the buckle 120 is rotated in a state where the movable clamps 12 and 82 are overlapped with the fixed clamps 11 and 81 (see FIGS. 9 and 11), the jaws 123 and 127 become the bearings 28 and 28 of the fixed clamps 11 and 81, respectively. It will be hooked by 90 and will be in a locked state.
[0049]
By the operation of setting the tubes 7 and 8 and locking the buckle 120 performed by such a user, the tube connection device confirms the tube set and unlocks the clamp rotor 30.
First, when the user locks the buckles 120 and 125, the pressing protrusion 124 of the buckle 120 turns on the limit switch 201 shown in FIG. Therefore, the ON signal of the limit switch 201 is compared with the detection signal previously detected by the movement of the plunger 104, and the presence or absence of the tubes 7 and 8 is confirmed.
Therefore, on the control side, if the ON signal of the limit switch 201 is input when the tubes 7 and 8 are not set, the tube is not set correctly or there is no tube. Inform the user. On the other hand, if the ON signal of the limit switch 201 is input with the tubes 7 and 8 set, the next tube connection start signal is awaited.
[0050]
Further, it is necessary to prevent the movable clamps 12 and 82 from being accidentally opened after the tube connecting device is driven. This is because the tubes 7 and 8 are unclamped and the tubes cannot be held.
Therefore, the solenoid 202 shown in FIG. 10 is energized by the ON signal of the limit switch 201, and the plunger 203 is raised. As a result, in the state shown in FIG. 11, the plunger 203 pops out on the track in the opening direction of the pressing protrusion 124, and the buckle 120 itself cannot be rotated. As a result, the opening of the movable clamps 12, 82 is prevented. The
[0051]
Next, when the movable clamps 12 and 82 are overlapped with the fixed clamps 11 and 81, the positioning protrusions 21 and 89 protruding from the fixed clamps 11 and 81 enter the movable clamps 12 and 82 (FIGS. 9 and 9). 11), and is fitted with no gap in the lateral direction. Therefore, the lateral displacement is prevented, and the fixed clamps 11 and 81 and the movable clamps 12 and 82 are overlapped at an accurate position.
At this time, on the first tube holder 1 side, as shown in FIG. 9, the leaf spring 71 is pushed away by the positioning protrusion 21 that has entered the movable clamp 12 side. Therefore, the leaf spring 71 is bent and deformed by the pressing force of the positioning protrusion 21, and the engagement piece 72 is retracted by the deformation and is removed from the lock groove 37 b of the clamp rotor 30.
[0052]
Next, when the user locks the buckle 125, the pressing protrusion 128 acts to push in the crank plate 66 (shown by a broken line in FIG. 9) protruding from the fixed clamp 11. Then, the crank plate 66 rotates with the pin 68b as a fulcrum, and the other end pushes the hook portion 65q of the slide plate 65. Therefore, the slide plate 65 slides against the urging force of the spring 67, and the engaging portion 65p moves backward to be removed from the lock groove 37a of the clamp rotor 30. As a result, the clamp rotor 30 (rotor pieces 31, 32) can be rotated free.
[0053]
Therefore, when the start switch is input from the user to the tube connecting device in which the tubes 7 and 8 are accurately clamped and in the input standby state of the start switch, each mechanism of the device is driven to cut and cut the tube. Connection is performed. At that time, the wafer 6 is first exchanged.
This is because one wafer 6 is used for each tube connection, and the previously used wafer 6 remains in the wafer holder 140 (see FIG. 1). Therefore, when the start switch is input, the wafer 6 is first replaced by the following operation (see FIGS. 1 and 2).
[0054]
When the start switch is input by the user, the stepping motor 5 is driven, and the rotation output is transmitted to the male screw 172 constituting the ball screw via the drive gear 174 and the transmission gear 173. For this reason, the male screw 172 rotates, and the female screw block 163 of the female screw screwed into the male screw 172 moves in the axial direction. The female screw block 163 is not rotated by the slider 162 and thus does not rotate. Accordingly, the slider 162 slides on the guide rod 171 in the axial direction by driving the stepping motor 5, and the feed piece 161 and the operating rod 195 move in the same direction as the slider 162 moves.
Therefore, the feed piece 161 sent in the X direction is pushed forward by the claw portion 161a at the front end hooking the rear end of the wafer 6, and only one wafer 6 is extracted from the wafer cassette 160. The wafer 6 pushed out by the feeding piece 161 advances in the X direction while being upright, and is sent to the groove in the wafer holder 140.
[0055]
The movement of the slider 162 in the X direction causes the wafer 6 to be opened / closed by the operation rod 195 as well as the wafer 6 is fed by the feed piece 161. When the slider 162 moves in the X direction, the operation rod 195 that is pin-supported at the tip of the support arm 168 similarly slides on the rail 192 in the X direction. At this time, the operation rod 195 moves linearly without dropping from the rail 192 because the guide groove 195 a is fitted in the guide pin 193 on the rail 192. The operation rod 195 that has slid on the rail 192 in the X direction enters between the fixed clamp 81 of the second tube holder 81 and the wafer holder 140. Since the operation rod 195 is synchronized with the movement of the feed piece 161 by the slider 162, the wafer holder 140 is opened and closed as the wafer 6 is inserted into the wafer holder 140.
[0056]
A convex line 145 s (see FIG. 15) formed on the opening / closing plate 145 of the wafer holder 140 is positioned on the linear movement of the operation rod 195 that moves forward in the X direction in accordance with the feeding of the wafer 6. Therefore, the straight operation rod 195 hits the convex line 145s that protrudes from the side of the opening / closing plate 145. However, since the tip of the operating rod 195 and the end of the convex line 145s are both inclined, the forward movement of the operating rod 195 causes a lateral pressing force to act on the on-off valve 145 without hitting the operating rod 195. Therefore, the lower side of the opening / closing plate 145 where the convex line 145 s is formed is pushed toward the fixed plate 143 side, and the upper side is swung away from the fixed plate 143 to be opened. Thereafter, the lower side of the open / close plate 143 is pressed by the operation rod 195 that slides forward along the convex line 145s, and the open state is maintained.
Accordingly, the wafer 6 is fed into the wafer holder 140 in accordance with the opening operation of the opening / closing plate 143, and then the open state is maintained until the wafer 6 is placed at a fixed position.
[0057]
The position of the wafer 6 disposed in the wafer holder 140 is adjusted by the stop position of the feed piece 161. In the feed frame 161, as shown in FIG. 2, the marker 167 moves integrally, and the movement of the marker 167 is detected by the feed detection sensor 186. That is, the position of the feed piece 161 when the marker 167 moves to the detection position of the feed detection sensor 186 becomes the home position of the wafer 6 in the wafer holder 140.
Therefore, when the marker 167 moves together with the feed piece 161 in the X direction and is detected by the feed detection sensor 186, a detection signal from the feed detection sensor 186 is sent to the control side, and the stepping motor 5 The reverse rotation drive control is performed.
[0058]
Therefore, the male screw 172 is reversely rotated, the female screw block 163 and the slider 162 are moved in the anti-X direction, and the feed piece 161 is retracted, so that only the wafer 6 is left in the wafer holder 140.
When the position returns to the position shown in FIG. 2, the standby detection sensor 185 detects the marker 166, and the detection signal is sent to the control side to control the rotation stop of the stepping motor 5.
As described above, the movement position of the slider 162 and the like is detected and controlled by the standby detection sensor 185 and the feed detection sensor 186. The moving position can be finely adjusted to the fixed position of the wafer 6 or the standby position of the slider 162 or the like by changing the inclination of the markers 166 and 167 with respect to the sensors 185 and 186 fixed to the control board 183. .
[0059]
Returning, when the wafer 6 is inserted into the wafer holder 140 (see FIGS. 14 and 15), the wafer 6 slides in the groove between the base plate 141 and the fixed plate 143. Since the positioning plate springs 147a, 147b, and 147c pressed against the fixed plate 143 by the elastic force are provided on the path, the wafer 6 has its positioning plate springs 147a, 147b, and 147c. Thus, it enters while being pressed against the fixed plate 143, and is arranged at the above-mentioned fixed position.
On the other hand, the used wafer 6 is still loaded in the wafer holder 140, but the used wafer 6 is also pressed against the fixed plate 143 by the positioning plate springs 147a, 147b, 147c. Therefore, even when the wafers 6 and 6 are as thin as several hundred μm, the end faces always overlap each other, and the used wafer 6 is pushed out of the wafer holder 140 by the new wafer 6, so that the wafer 6 can be exchanged reliably.
[0060]
Further, when the wafer 6 is sent to a fixed position, the rear end of the wafer 6 passes through the retreat prevention plate spring 148, the front end of the retreat prevention plate spring 148 hits the fixed plate 143, and the wafer 6 is returned by the return 148a of the front end. The retreat is cut off. Therefore, when the user tries to take out the used wafer 6 that has been pushed out, even if it is pushed by mistake, the new wafer 6 is placed in a fixed position without being pushed back.
As described above, when the operating rod 195 moves backward together with the slider 162, the opening / closing plate 145 is released from the pressing and is closed by a biasing member (not shown). Therefore, the electrodes 146a and 146b provided on the opening / closing plate 145 come into contact with the resistor terminals of the wafer 6, and the energized resistor is heated to raise the temperature of the wafer 6 (about 300 ° C.).
[0061]
Then, following the sufficient temperature rise of the wafer 6, the tubes 7 and 8 are cut. In the cutting of the tubes 7 and 8, the wafer 6 is lifted by swinging the wafer holder 140, and the wafer 6 is orthogonal to the tubes 7 and 8 clamped by the first tube holder 1 and the second tube holder 2. Such swinging of the wafer holder 140 is performed by transmitting the rotation of the stepping motor 4 (see FIG. 2) to the drive cam 92 (see FIG. 10).
Therefore, when the stepping motor 4 is activated, the rotation output is transmitted from the drive gear 96 fixed to the motor shaft 4 a to the reduction gear 95, and rotation is given to the drive cam 92 formed integrally with the reduction gear 95. When the drive cam 92 rotates, the height of the top of the cutting cam 94 on which the roller bearing 155 is placed changes. In that case, the wafer holder 140 is pushed up by the drive cam 92 and rises, and the wafer holder 140 is lowered according to the drive cam 92.
[0062]
As shown in FIG. 2, the swinging tube 142 portion of the wafer holder 140 is pressed against the fixed clamp 81 by a spring 153. Therefore, the end surface 151A of the mounting block 151 and the end surface 152A of the sliding tube 152 that are on the same plane as the end surface 142A of the swing tube 142 are pressed against the side wall 85 (reference surface) of the fixed clamp 81.
As described above, when the drive cam 92 rotates, the wafer holder 140 is
Then, an upward swinging motion around the swinging tube 142 is performed. At that time, each end face 142A, 151A, 152A slides on the side wall 85 (see FIG. 10) of the fixed clamp body, so that the wafer holder 140 is not shaken and the wafer 6 is orthogonal to the tubes 7, 8. Will move. In addition, since the slide tape (not shown) for suppressing sliding resistance is stuck to the sliding area of each end surface 142A, 151A, 152A on the side wall 85 which is a reference surface, the swinging operation of the wafer holder 140 is performed. It is done smoothly.
[0063]
Therefore, the tubes 7 and 8 clamped by the first tube holder 1 and the second tube holder 2 are cut from below by the wafer 6, and the applied portion of the heated wafer 6 is melted and cut. The FIG. 16 is a view showing the position of the wafer 6 when the tube is cut.
The heated wafer 6 is cut so that the cut side (upper side) is applied to the tubes 7 and 8 from below and is slid obliquely with respect to the tubes 7 and 8 by the swinging wafer holder 140. Therefore, since the contact part of the cutting edge of the wafer 6 that cuts the tubes 7 and 8 is shifted in the process of cutting, the heat radiation of the cutting part in the wafer 6 is suppressed and the amount of heat is maintained.
[0064]
That is, since the tubes 7 and 8 are welded and connected after cutting, the tube cut surfaces must be in a sufficiently molten state. On the other hand, the heat of the wafer 6 is lost due to melting of the tubes 7 and 8 at the time of cutting. Further, the wafer 6 itself is thin and has no heat storage capability. For this reason, when the wafer 6 is cut at a part of the cutting edge, the temperature of the part is remarkably lowered, and the cut surface cannot be sufficiently melted. Therefore, if the cutting edge slides as described above, the portion for cutting the tubes 7 and 8 is displaced, so that the temperature of the cutting portion can be maintained at a certain temperature or higher enough to melt the tube. The cut surface can be in a molten state sufficient for connection.
[0065]
The cutting and connection of the tubes 7 and 8 by the wafer 6 are performed at the closed portions (see FIG. 13) of the tubes 7 and 8 crushed by the first tube holder 1 and the second tube holder 2.
When the movable clamps 12 and 82 are overlapped with the fixed clamps 11 and 81, the tubes 7 and 8 supported by the tube guides 40 and 100 (see FIG. 1) are the closed portions of the clamp rotor 30 in the first tube holder 1. 13b and 33b (see FIG. 3), and in the second tube holder 2, the holding groove 98 (FIG. 10) of the fixed clamp body 83 and the closing portion 114 (see FIG. 12) of the movable clamp body 110 are used. It is clamped as shown in Therefore, between the first tube holder 1 and the second tube holder 2, a portion where the cylindrical tubes 7 and 8 are flattened and the inside of the tube is in close contact appears. This portion is a portion to be cut and connected by the wafer 6.
[0066]
Therefore, the wafer 6 is lifted by the swinging of the wafer holder 140 and the tubes 7 and 8 are cut as shown in FIG. The tubes 7 and 8 are clamped and crushed in advance, and the liquid in the tube is pushed away from the cut portion at the time of clamping, and therefore does not flow out of the cut portion at the time of cutting.
When the tube is cut, the cut portions of the tubes 7 and 8 are in a high temperature state in which the resin is melted or softened. During this time, the inside of the tubes 7 and 8 is maintained in a sterile state without being exposed to the atmosphere.
[0067]
Next, the tubes 7 and 8 separated by the wafer 6 are reversed by the rotation of the clamp rotor 30 while being clamped by the first tube holder 1.
Therefore, when the wafer 6 is sufficiently raised, the driving of the stepping motor 4 is stopped, and the clamp rotor 30 is rotated by the subsequent driving of the stepping motor 3 (see FIG. 2). As shown in FIG. 9, the rotation of the stepping motor 3 is transmitted from the drive gear 61 of the motor shaft 3 a to the clamp rotor 30 via the access gear 62 and the drive gear 63. Therefore, the clamp rotor 30 rotates with the rotor pieces 31 and 32 as one rotating body shown in FIG.
The clamp rotor 30 is rotated by 180 ° so that the rotor pieces 31 and 32 are switched between the fixed clamp 11 and the movable clamp 12 by the stepping motor 3. Accordingly, as in the case shown in FIG. 19, the positions of the two tubes 7a and 8a that are clamped by being stacked vertically are inverted upside down.
[0068]
At this time, the clamp rotor 30 is rotatably supported by the rollers 20, 55, which are arranged at equal intervals on the same circumference, and performs accurate rotation around the virtual rotation axis.
Since the tubes 7a and 8a are clamped so that the contact surfaces overlap each other on the rotation axis, when the clamp rotor 30 is reversed and the positions of the rotor pieces 31 and 32 are switched, the contact surfaces are on the rotation axis. Therefore, the cut surfaces of the tubes 7a and 8a are accurately overlapped with the positions before reversal.
[0069]
Here, the tube guide 40 when the tubes 7a and 8a are reversed will be described. FIG. 17 is a side view showing the tube guide 40.
Before the rotation of the clamp rotor 30, as shown in FIG. 17A, the tubes 7 a and 8 a are stacked one above the other and sandwiched between the guide claws 42 and 42 from both sides. Then, the tubes 7a and 8a are rotated along with the clamp rotor 30, and when the clamp rotor 30 is rotated by 90 °, the arrangement of the tubes 7a and 8a becomes sideways as shown in FIG. 17B, and further rotated by 90 °. By the way, the tubes 7a and 8a (parentheses) are turned upside down and arranged vertically as shown in FIG. In this way, while the tubes 7a and 8a are switched up and down, the horizontal width of the two tubes 7a and 8a widens as the tube rotates, but the tube guide 40 has springs 43 and 43 ( As shown in FIG. 7, the guide claws 42 and 42 are pushed outward.
Therefore, the tube guide 40 securely holds the tubes 7a and 8a up and down, and escapes to the outside when the tube is reversed to smoothly perform the reversing operation.
[0070]
The cut surfaces of the tubes 7a and 8a that are turned upside down are in the same position with the wafer 6 sandwiched between the cut surfaces of the tubes 7b and 8b (see FIG. 19) clamped on the second tube holder 2 side, just after cutting. Placed in. Therefore, when the wafer 6 is subsequently lowered and the cut surfaces are pressed against each other in the axial direction, the cut tubes 7 and 8 are welded to each other, and the tubes 9 and 10 are each one tube 9 and 10 (see FIG. 20). It becomes.
At that time, the stepping motor 3 that reverses the clamp rotor 30 is stopped first, and then the stepping motor 4 is started again. Therefore, the drive cam 92 (see FIG. 10) rotates, the height of the top of the cutting cam 94 on which the roller bearing 155 (see FIG. 15) is placed is lowered, and the wafer holder 140 is lowered accordingly. Therefore, the wafer 6 is also lowered and extracted from the tubes 7 and 8. At that time, since the contact resistance between the wafer 6 and the melted tube cut surface is large, the wafer 6 is caught by the slip stoppers 143a and 143b so that the wafer 6 does not come off from the wafer holder 140, thereby preventing the wafer 6 from coming off.
[0071]
The driving cam 92 for lowering the wafer holder 140 is integrally formed with a cutting cam 94 and a sliding cam surface 93 for moving the first tube holder 1. Therefore, the wafer 6 is lowered and the wafer 6 is extracted from the tubes 7 and 8 and the first tube holder 1 is slid to the second tube holder 2 at a predetermined timing. Pressed in the axial direction.
The first tube holder 1 is always urged by a spring 131 (see FIG. 1), and the roller bearing 25 (see FIG. 6) of the pressing arm 24 contacts the sliding cam 93 (see FIG. 10) of the drive cam 92. It is touched. Therefore, at the stage where the wafer holder 140 is raised by the rotation of the drive cam 92, the roller bearing 25 rolls on the plane portion of the slide cam 93, and the first tube holder 1 has a constant distance from the second tube holder 2. It is kept in. Then, at the timing when the wafer 6 is extracted from the tubes 7 and 8, the roller bearing 25 enters the rolling slide cam surface 93 a of the sliding cam 93 and rolls.
[0072]
Therefore, the first tube holder 1 is pushed toward the second tube holder 2 by the biasing force of the spring 131, the slide tube 22 slides on the guide rod 88, and the guide roller 23 rolls on the guide block 29. Then, the translation is performed.
Therefore, the first tube holder 1 is brought close to the second tube holder 2 by the difference between the flat portion of the slide cam 93 and the slide cam surface 93a, but the amount is small. This is because the cut surfaces of the tubes 7 and 8 are moved by the amount of cutting (about the thickness of the wafer 6) and the cut surfaces of the tubes are pressed against each other.
Then, the cut and inverted tubes 7 and 8 are welded and connected by pressing the cut surfaces, and as shown in FIG. 20, two tubes 9 and 10 that are alternately switched are formed. .
[0073]
The completion of the lowering of the wafer holder 140 is detected by the limit switch 205 attached to the fixed clamp 22. By the detection, the plunger 203 of the solenoid 202 is lowered, and the buckles 120 and 125 can be removed.
Therefore, the user removes the buckles 120 and 125, opens the movable clamps 12 and 82, and takes out the tubes 9 and 10.
The brought first tube holder 1 stays in the same position until the next tube connecting operation is performed. When the switch is turned on, the plunger 104 provided in the fixed clamp 81 of the second tube holder 2. (See FIG. 11), it is detected that there is no tube, and the detection causes the stepping motor 4 to start, adjusts the rotation of the drive cam 92, and sets the position of the first tube holder 1 to the second tube holder 2. Move away from.
[0074]
In addition, the rotor pieces 31 and 32 are locked again by removing the buckles 120 and 125 and opening the movable clamps 12 and 82 (see FIG. 9).
First, when the user removes the buckle 125, the pressing protrusion 128 rotates to release the crank plate 66, and the slide plate 65 that has been restricted from sliding can be slid through the crank plate 66. . Therefore, the slide plate 65 slides toward the clamp rotor 30 by the urging force of the spring 67, and the engaging portion 65p enters the lock groove 37a.
On the other hand, when the movable clamp 12 is opened as shown in FIG. 1, the positioning protrusion 21 that has entered the movable clamp 12 is relatively removed. Therefore, the leaf spring 71 becomes free, and the engagement piece 72 is pushed out by its elasticity and enters the lock groove 37 b of the clamp rotor 30.
Therefore, when the movable clamp 12 is opened, the rotor pieces 31 and 32 are locked in the state when the tubes are reversed.
[0075]
Therefore, according to such a tube connecting apparatus of the present embodiment, the wafer holder 140 slides on the side wall 85 (reference surface) of the fixed clamp body 83 to move the wafer 6 up and down. In order to surely move on the orthogonal plane orthogonal to 7, 8, the cut surfaces of the tubes 7, 8 cut by the wafer 6 are equally orthogonal, and the tube cut surfaces after inversion are accurately aligned with each other. Connection can now be made.
The wafer holder 140 is pivotally supported by a swing tube 142, and moves the wafer 6 up and down by a swing operation. For this reason, the wafer 6 is cut so as to slide obliquely with respect to the tubes 7 and 8, and the cutting portion is shifted in the process of cutting the tubes 7 and 8, so that the heat radiation of the cutting portion in the wafer 6 is suppressed, and the tube A sufficient amount of heat is maintained to melt and cut.
[0076]
Further, according to the tube connecting apparatus of the present embodiment, the wafer 6 is loaded into the wafer holder 140 by the feed piece 161 or the like every time the tube is connected, and the used wafer 6 is pushed out and replaced. The tubes 7 and 8 are cut with a sanitary wafer.
Further, according to the tube connecting apparatus of the present embodiment, the wafer holder 140 opens and closes the opening / closing plate 145 with respect to the fixed plate 143, and the opening / closing plate 145 is previously moved by the operation rod 195 when the wafer 6 is loaded and replaced. Since the gap is opened with the fixing plate 143, the wafer 6 can be loaded and replaced smoothly. In particular, the electrodes 146a and 146b can be retracted during loading and replacement, and the wafer 6 can be moved smoothly without being caught.
[0077]
In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, in the above embodiment, the wafer holder 140 is swung, but it may be moved linearly as in the prior art.
[0078]
【The invention's effect】
Therefore, according to the present invention, the holder loaded with the cutting plate slides on the reference surface formed on the first tube holder or the second tube holder so as to be orthogonal to the tube. Thus, it has become possible to provide a tube connecting device that reliably connects the tubes.
In the present invention, the holder is pivotally supported so as to swing on an orthogonal plane orthogonal to the tube, and swings by sliding on the reference surface. Therefore, it is possible to provide a tube connection device that reliably connects tubes while maintaining a sufficient amount of heat to melt and cut.
[0079]
The present invention also includes a holder for loading a cutting plate in an orthogonal direction with respect to the tubes held by the first tube holder and the second tube holder, and moving up and down in the orthogonal direction to cut the tube; Since it has a structure having a guide means for extruding one cutting plate from a cassette provided with a plurality of cutting plates and loading it into the holder along the guide groove, the cutting plate is replaced every time and the tube is cut. It has become possible to provide a tube connecting device that can be performed in a sanitary manner.
[0080]
The present invention also provides a holder for loading the cutting plate in a direction orthogonal to the tubes held by the first tube holder and the second tube holder and moving the tube up and down in the orthogonal direction to cut the tube. The holder is formed by receiving an urging force in the closing direction so that the open / close plate is pivoted to open and close the fixed plate so as to sandwich the loaded cut plate from both sides. Since the pressing piece for pressing the opening / closing plate to open the opening / closing plate before loading is provided, it is possible to provide a tube connecting device that can smoothly load and replace the cutting plate. It was.
[0081]
In the present invention, the retraction prevention spring is bent by the cutting plate when the cutting plate holder is inserted to open the path, and the cutting plate is elastically restored after passing to cut the retraction path of the cutting plate. It has become possible to provide a tube connecting device capable of loading and maintaining a plate in a fixed position in a holder.
In addition, the present invention positions the insertion-side cutting plate inserted into the holder and the discharge-side cutting plate loaded in the holder by biasing both cutting plates toward the fixed plate so that the ends overlap each other. Therefore, it is possible to provide a tube connecting device that can push out a used discharge-side cutting plate and reliably replace it with an insertion-side cutting plate.
[Brief description of the drawings]
FIG. 1 is a perspective view of an internal mechanism in an embodiment of a tube connecting device of the present invention.
FIG. 2 is a plan view of an internal mechanism in an embodiment of the tube connecting device of the present invention.
FIG. 3 is a perspective view showing a clamp rotor.
4 is a cross-sectional view of the rotor piece in FIG. 3 in the A direction.
FIG. 5 is a perspective view showing a fixed clamp body.
6 is a plan view of the fixed clamp body 13. FIG.
FIG. 7 is a perspective view of the tube guide 40 showing the side of the attachment surface to the body cover 14;
8 is an exploded perspective view showing the movable clamp 12 of the first tube holder 1. FIG.
9 is a cross-sectional view showing the first tube holder 1. FIG.
10 is an external perspective view of a fixing clamp 81 of the second tube holder 2. FIG.
11 is a side view of the fixed clamp body 83 of the second tube holder 2. FIG.
12 is a perspective view showing a fixed clamp 81 and a buckle 111. FIG.
13 is a front view showing the first tube holder 1 and the second tube holder 2 from the direction C in FIG. 1. FIG.
FIG. 14 is a perspective view showing the wafer holder as viewed from the first tube holder 1 side.
FIG. 15 is a perspective view showing the wafer holder as viewed from the second tube holder 2 side.
FIG. 16 is a diagram showing the position of the wafer 6 when the tube is cut.
FIG. 17 is a side view showing a tube guide 40. FIG.
FIG. 18 is a perspective view showing a tube clamp portion of a conventional tube connection device.
FIG. 19 is a diagram showing a state when the tube is cut and inverted.
FIG. 20 is a view showing a connection tube.
FIG. 21 is a view showing a part of a reversing mechanism in a conventional tube connecting device.
[Explanation of symbols]
1 First tube holder
2 Second tube holder
11,81 fixed clamp
12,82 Movable clamp
30 Clamp rotor
31, 32 rotor piece

Claims (3)

A plurality of flexible tubes are held by the first tube holder (1) and the second tube holder (2), and the tubes are held by the first tube holder (1) and the second tube holder (2). In the tube connection device for welding and connecting different tube cutting surfaces after cutting by heating and melting with the cutting plate (6) heated between,
The cutting plate (6) is loaded in the orthogonal direction with respect to the tube held by the first tube holder (1) and the second tube holder (2), and the tube is moved up and down in the orthogonal direction. A holder (140) for cutting
The holder (140) includes a fixing plate (143) and an opening / closing plate (145) for sandwiching the loaded cutting plate (6) from both sides, and a base plate (141) for fixing the fixing plate (143). Prepared,
The open / close plate (145) is pivotally supported by the base plate (141) so that the open / close plate (145) opens and closes the upper side of the fixed plate (143), and exerts an urging force in the closing direction. And a convex line (145s) for opening the opening / closing plate (145) by applying an operating rod (195) before loading the cutting plate (6) into the holder (140). A tube connecting device characterized by comprising: In the tube connecting device according to claim 1,
Both cutting plates (6) such that the insertion side cutting plate (6) inserted into the holder (140) and the discharge side cutting plate (6) loaded in the holder (140) overlap each other. , 6) is provided with positioning springs (147a, 147b, 147c) for urging and positioning the fixing plate (143) side. In the tube connecting device according to claim 1,
Guiding means for pushing out one cutting plate (6) from a cassette (160) having a plurality of cutting plates (6) and loading the holder (140) along a guide groove;
A leaf spring (147a) bent outward in the feeding direction of the cutting plate (6) fed by the guide means is placed on the holder (140) so that the tip portion overlaps the path of the cutting plate (6). And an anti-retraction spring (148) fixedly disposed on
The retraction preventing spring (148) is bent by the cutting plate (6) when the holder (140) of the cutting plate (6) is inserted to open a path, and is elastically restored after the cutting plate (6) has passed. A tube connecting device for cutting off the withdrawal path of the cutting plate (6).

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