KR102285561B1 - Transparent pipe cutting device for pipette - Google Patents

Abstract

The present invention relates to a transparent pipette tube cutting apparatus. According to the present invention, the transparent pipette tube cutting apparatus comprises: a table including a horizontal support plate; a supply unit installed on the upper part of the support plate, accommodating transparent tubes of a certain length input from the outside, and supplying the transparent tubes one by one to the downstream side; a horizontal transfer unit receiving the transparent tube supplied from the supply unit, horizontally supporting the transparent tube in parallel, and transferring the supported transparent tube in a direction orthogonal to the longitudinal direction of the transparent tube; a heating unit installed on the table and heating the central part in the longitudinal direction of the transparent tube to a plastically deformable state during transport; a stretching unit located on the downstream side of the heating unit, holding and pulling both ends of the transparent tube when the central part is heated by the heating unit so that the central part is stretched and thin; and a cutting unit cutting the central part of the transparent tube passing through the stretching unit. Accordingly, the transparent pipette tube cutting apparatus continuously transfers prepared transparent tubes at regular intervals and sequentially performs heating, stretching, and cutting without stoppage, thereby providing fast pipette production speed and good productivity.

Description

Transparent pipe cutting device for pipette

The present invention relates to a cutting device for cutting a transparent pipe for a pipette, and more particularly, to a transparent pipe cutting device for a pipette having a structure for melting and stretching a central portion of a continuously supplied transparent tube and cutting the stretched portion. .

Chemical laboratories are equipped with various kinds of laboratory tools and chemicals, and the experimenter selects the appropriate tools and chemicals to conduct the desired experiment. There are many different types of laboratory tools, from powered stirrers, centrifuges, and electronic scales to beakers, flasks, measuring cylinders, glass rods, pipettes, and the like.

Among these tools, a pipette is used when transferring reagents or chemicals, and has a spout through which a liquid enters and exits at its tip. For handling toxic chemical solutions, pipettes play an indispensable and important role. Some pipettes are not graduated, such as a dropper, and others are marked to measure the exact amount. Pipettes are usually made by cutting a transparent tube.

As mentioned above, pipettes are made by cutting a clear tube to the required length. For example, it is made by cutting, molding, and post-processing a transparent tube extending in the longitudinal direction.

As a background technology related to the cutting of transparent tubes, a horizontal glass tube laser cutting device has been disclosed through Korean Patent Registration No. 10-1344371.

Disclosed cutting device, the main shaft is installed horizontally to rotate in one direction by the rotational force of the motor on the upper portion of the base, a plurality of horizontal shafts are annularly coupled to the outer periphery; It has a fixed arm and a driving arm that are respectively coupled to one end of the horizontal axis and hold the end of the glass tube so that the glass tube can be fitted and coupled in the horizontal direction, and the glass tube is drawn out by the rotating main shaft, the half-knife cutting position, and the arm reset position , a glass tube transfer supply member for transferring and supplying to the cutting position; an arm operation unit installed at the withdrawing position and operable to operate the driving arm of the glass tube transfer and supply member to release the restraining force holding the glass tube, thereby enabling the glass tube to advance; a drawing member installed on the base so as to be positioned in front of the glass tube feeding and supplying member at the drawing out position and drawing out the glass tube inserted into the glass tube feeding and feeding member by the cut length; a laser gun installed at one side of the half-cutting position and irradiating a laser to the side of the cut portion of the rotating glass tube to cut only a portion of the thickness of the glass tube in half; a rotating member installed on the bottom of the base corresponding to the half-knife cutting position and configured to rotate the glass tube feeding and supplying member during the half-knife cutting operation to rotate the glass tube; a reset member installed at the arm reset position and configured to precisely rotate the glass tube feeding and supplying member to reset the driving arm to the initial position so that the arm operation unit operates the driving arm during the next glass tube withdrawal operation; It is installed at the cutting position and consists of a tong robot that holds the half-cut glass tube and twists it at a certain angle to cut it.

Domestic Patent Publication No. 10-1344371 (Horizontal Glass Tube Laser Cutting Device) Domestic Patent Publication No. 10-0763486 (glass tube cutting device and cutting method)

An object of the present invention is to provide a transparent tube cutting device for pipettes, which continuously transfers a prepared transparent tube at regular intervals and provides good productivity by sequentially performing heating, stretching, and cutting non-stop.

A transparent pipe cutting apparatus for a pipette of the present invention as a means of solving the problems for achieving the above object includes: a table having a horizontal support plate; a supply part installed on the upper part of the support plate, accommodating a transparent tube of a certain length input from the outside, and supplying one by one to the downstream side; a horizontal transfer unit for receiving the transparent tube supplied from the supply unit, horizontally supporting the transparent tube, and transferring the supported transparent tube in a direction orthogonal to the longitudinal direction of the transparent tube; a heating unit installed on the table and heating the central portion in the longitudinal direction of the transparent tube during transport to a plastically deformable state; a stretching part located on the downstream side of the heating part, holding both ends of the transparent tube in a state in which the central part is heated by the heating part and pulling it, so that the central part is stretched and thin; and a cutting unit for cutting the central portion of the transparent tube that has passed through the stretching unit.

In addition, the supply unit; A supporter fixed to a support plate and providing support, a sloping plate mounted on the upper part of the supporter, supporting a transparent tube and inclined downward toward the horizontal transfer unit, and erected vertically on the left and right sides of the swash plate, the transparent tube An alignment plate for preventing longitudinal movement, a horizontal bar having both ends pivotally supported by the alignment plate, and a swing positioned on the upper portion of the swash plate with the upper end fixed to the horizontal bar, and passing a transparent tube between the swash plate and the swash plate a plate and a discharge actuator that rotates the horizontal bar in both directions so that a swing plate guides the supply of the transparent tube, the horizontal transfer unit; A plurality of first actuators that are vertically fixed to the upper surface of the support plate, a first upper support supported by each first actuator and raised and lowered by the operation of the first actuator, horizontally fixed to the first upper support and transport of a transparent pipe A plurality of first horizontal beams extending in the direction and spaced apart in parallel to each other, a lifting support part having a first transport holder fixed on the upper part of the first horizontal beam and having a holding groove into which a transparent tube is inserted is formed at regular pitch intervals; , a plurality of fixed rails fixed to the upper surface of the support upper plate and extending in the transport direction of the transparent tube, a horizontal transfer plate supported slidably on the fixed rail, a second actuator installed vertically on the horizontal transfer plate, a second actuator A second upper support supported and moved up and down, a second horizontal beam fixed horizontally to the second upper support and parallel to the first horizontal beam, a holding groove mounted on the upper part of the second horizontal beam and into which a transparent tube is fitted It includes a second transfer holder formed at a pitch interval, and a lifting and lowering transfer unit provided with a transfer actuator for sliding and reciprocating all horizontal transfer plates at the same time.

And, the heating unit; It is located below the central portion in the longitudinal direction of the transparent tube transferred by the horizontal transfer unit, and includes a heater for applying heat to the central portion of the transparent tube. A plurality of pulley fixing plates spaced parallel to each other on the support plate and fixed vertically, a plurality of pulleys rotatably mounted on the pulley fixing plate, a transparent tube in a state of circulating along the pulley and supported by the horizontal transport part A friction belt partially contacting and applying a friction force to rotate the transparent tube, a first shaft rotating part having a belt driving part for circulating the friction belt by driving a pulley is installed, the extension part; A fixture mounted on a support plate, a carriage supported on the fixture and capable of sliding in the longitudinal direction of the transparent tube, an extension actuator that slides the carriage, and a jaw mounted vertically on the carriage and fixed by biting the end of the transparent tube A pair of tensioners including a jaw actuator are included, and the tensioners are disposed on opposite sides of the transparent tube with a transfer path therebetween.

In addition, a support frame for providing support is mounted on the upper portion of the support plate, and the cutting unit; A plurality of pulley fixing plates fixed vertically on the upper part of the support plate, a plurality of pulleys rotatably supported on the pulley fixing plates, a transparent tube filled with the pulley and circulating along the pulley, supporting and supporting the transparent tube transferred by the horizontal transfer unit A support belt, a second shaft rotating part including a motor for circulating the support belt by driving a pulley, a press cylinder mounted on the support frame, an elevating block elevating by the press cylinder, and the elevating block installed in the lower part of the elevating block A presser having a plurality of press rollers that support the transparent tube mounted on the support belt in a descending state downward with the support belt so that the transparent tube receives rotational force from the support belt and rotates, and it is installed on the side of the presser A central cylinder mounted on a support frame, a lifting block that moves up and down by the center cylinder, a cutter housing fixed to the lower part of the lifting block, and a lifting block that is rotatably supported by the cutter housing as cutting the central part of the shaft-rotating transparent tube. A cutter having a disk-type cutter wheel that cuts the central portion of the transparent tube that rotates when descending is included.

The transparent tube cutting apparatus for a pipette of the present invention as described above continuously transfers the prepared transparent tube at regular intervals and sequentially heats, stretches, and cuts non-stop, thereby providing a fast production speed of the pipette and good productivity.

1 is a view for explaining a cutting method using a transparent pipette cutting device for a pipette according to an embodiment of the present invention.
2 and 3 are perspective views of a transparent tube cutting device for a pipette according to an embodiment of the present invention.
FIG. 4 is a front view of the transparent tube cutting device for pipettes shown in FIG. 2 .
FIG. 5 is a view for explaining the configuration of a supply unit in the transparent pipe cutting apparatus for a pipette shown in FIG. 2 .
6 is a plan view illustrating a transparent tube during transport in a transparent tube cutting apparatus for a pipette according to an embodiment of the present invention.
7 is a plan view illustrating the horizontal transfer unit and the heating unit shown in FIG. 6 .
8 is a perspective view separately illustrating the horizontal transfer unit of FIG. 7 .
9 is a perspective view of the lifting support part shown in FIG. 8 .
FIG. 10 is a view showing the structure of the elevating transfer unit of FIG. 8 .
11 is a view for explaining an operation method of the horizontal transfer unit shown in FIG.
12 is a perspective view for explaining the first and second shaft rotation units and the stretching device for rotating the transparent tube during transport.
13 is a perspective view showing the cutting device shown in FIG.

Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

1A to 1F are diagrams for explaining a cutting method using a transparent pipette cutting device for a pipette according to an embodiment of the present invention.

Basically, the cutting device 20 of this embodiment has a structure in which a central portion of a transparent tube having a predetermined length is thinly formed and the thinned part is cut. One transparent tube 11 is processed to make two pipettes 12 .

As shown in FIG. 1A , the transparent tube 11 has a predetermined diameter and length. The diameter and length of the transparent tube 11 are naturally different depending on the size of the pipette 12 to be manufactured. The transparent tube 11 is a material for making a pipette. The transparent tube may be a glass tube or a plastic tube.

If the transparent tube 11 is prepared, the central portion 11a of the transparent tube is heated. When the central part 11a is heated intensively, the heating part melts and becomes soft. (These physical property changes are the same as those commonly seen in glass factories.) 11b of FIG. 1c is a partially melted portion 11b partially melted by heating.

Next, as shown in FIG. 1D , both ends of the transparent tube 11 are pulled in the direction of the arrow a. When the transparent tube 11 is pulled, the partially molten portion 11b is stretched and the diameter is reduced. After the stretching operation is completed, the reduced portion (stretched portion) is cut through an annealing process. As shown in FIG. 1E, cutting is performed using the cutter wheel 81f.

Two pickets 12 are obtained through the cutting operation. As shown in Fig. 1f, the pipette 12 has a spout 12a at its tip. The spout 12a is a portion whose diameter is reduced through the stretching operation.

The cutting device 20 according to the present embodiment continuously performs the above-described operation. 2 and 3 are perspective views of a transparent tube cutting apparatus for a pipette according to an embodiment of the present invention, and FIG. 4 is a front view of the transparent tube cutting apparatus.

As shown, the cutting device 20 according to the present embodiment includes a table 21 , a supply unit 30 , a heating unit 40 , a horizontal transfer unit 50 , an extension unit 60 , and a cutting unit 80 . ) is included.

The table 21 has a support plate 21a thereon. The support plate 21a is a rectangular steel plate having a certain thickness and horizontally supports the above-mentioned components. Also disposed at the downstream end of the table 21 is a collection box 22 . The collection box 22 is a container for collecting the processed pipette 12 .

In addition, a controller 14 is installed on one side of the table 21 . The controller 14 outputs a signal for controlling the cutting device 20 . Needless to say, it is also possible to apply necessary information through the controller 14 .

On the other hand, the supply unit 30 serves to accommodate the transparent tube 11 of a certain length input from the outside and supply one by one to the downstream side. The supply unit 30 is illustrated in detail in FIG. 5 .

5, the supply unit 30, the supporter 33, the swash plate 31a, the alignment plate 31b, the inner support plate 31g, the horizontal bar 32c, the swing plate 32f, the discharge actuator (32a), is configured to include a descending guide plate (31d, 31e).

The supporter 33 supports the swash plate 31a as a structure fixed on the support top plate 21a. The swash plate 31a supports and supports the transparent tube 11 provided from the outside and is inclined downward toward the horizontal transfer unit 50 . The transparent tube 11 loaded on the swash plate 31a passes between the swash plate 31a and the inner support plate 31g by rolling downward by the action of gravity in a state of being in contact with each other.

The alignment plate 31b is a plate-shaped member erected vertically on the left and right sides of the swash plate 31a, and prevents movement of the transparent tube 11 in the longitudinal direction. In other words, the transparent tube 11 during movement is prevented from moving in the direction of the arrow b or the opposite direction. By the alignment plate 31b, both ends of the transparent tube 11 to be supplied are always aligned in a straight line.

The inner support plate 31g is a member mounted between the alignment plates 31b and passes the transparent tube 11 therethrough. The interval between the inner support plate 31g and the swash plate 31a may be about 1.5 times the outer diameter of the transparent tube 11 . The transparent tube 11 exits one by one by the inner support plate 31g. In addition, the inner support plate (31g) is provided with a slit-type passage (31h). The passage 31h is a passage for the swing plate 31f that rotates in the direction of the arrow c or the opposite direction.

The horizontal bar 32c is a round bar-shaped member whose both ends are axially rotatably supported by the left and right alignment plates 31b, and is coupled to the upper end of the swing plate 32f. The swing plate 32f is a substantially sector-shaped member, is positioned on the swash plate in a state supported by the horizontal bar 32c, and passes a transparent tube between the swash plate and the swash plate.

The discharge actuator 32a is mounted on one side alignment plate 31b and is connected to the horizontal bar 32c through the electric link 32b. The horizontal bar 32c rotates clockwise or counterclockwise by the operation of the discharge actuator 32a. The swing plate 32f rotates with the horizontal bar 32c as the rotation center by the operation of the discharge actuator 32a. Therefore, for example, when a bottleneck occurs at the lower end of the inner support plate 32g, the bottleneck can be eliminated by rotating in the opposite direction to the arrow c direction and pushing the stacked transparent tube 11 .

The descending guide plates 31d and 31e are plate-shaped members erected vertically at the lower end of the swash plate 31a, and receive the transparent tube 11 passing through the swash plate 31a and guide it downward. The transparent tube 11 is loaded into the horizontal transfer unit 50 by descending the descending guide plates 31d and 31e through the space between them. The distance between the descending guide plates 31d and 31e is about 1.2 times the diameter of the transparent tube 11 .

The horizontal transfer unit 50 horizontally supports the transparent tube 11 delivered from the supply unit 30 at regular pitch intervals and serves to transfer it in the direction of the arrow e of FIG. 6 . The transparent tube is heated and stretched while being transported by the horizontal transfer unit 50 and then reaches the cutting unit 80 and is cut. To this end, the heating unit 40 and the stretching unit 60 for heating the transparent tube 11 are disposed along the transport path of the transparent tube 11 .

6 is a plan view showing a main part of the transparent tube cutting device 20 for a pipette according to an embodiment of the present invention together with the transparent tube 11, and FIG. 7 is the horizontal transfer unit 50 shown in FIG. , a top view showing the heating unit 40 , the stretching unit 60 , and the side guider 46 . In addition, FIG. 8 is a perspective view separately showing the horizontal transfer unit of FIG. 7 , FIG. 9 is a perspective view of the elevating support unit shown in FIG. 8 , and FIG. 10 is a view showing the structure of the elevating transfer unit of FIG. 8 . In addition, FIG. 11 is a view for explaining the operation method of the horizontal transfer unit shown in FIG.

As shown, the transparent tube 11 passing through the supply unit 30 moves in the direction of the arrow e while being supported by the horizontal transfer unit 50 . As mentioned above, the transported transparent tube 11 is heated while passing through the heating unit 40 and stretched while passing through the stretching unit 60 . As shown in FIG. 6 , it can be seen that the length of the transparent tube after passing through the stretching unit 60 is relatively longer than that of the transparent tube 11 facing the stretching unit 60 . Moreover, the central part of the transparent tube 11 which passed through the extending|stretching part is thin. This was explained through FIG. 1D.

The horizontal transfer unit 70 receives the transparent tube 11 supplied from the supply unit 30, horizontally supports it, and transfers the supported transparent tube in a direction perpendicular to the longitudinal direction of the transparent tube. .

The horizontal transfer unit 70 includes an elevating support unit 51 and an elevating transfer unit 55 . The lifting support unit 51 and the lifting transfer unit 55 are mounted on the support upper plate 21a in a superimposed state, so to speak, and operate independently.

The elevating support unit 51 only elevates the first transfer holder 53m on the spot, and the elevating transfer unit 55 elevates and reciprocates the second transfer holder 56h (reciprocating movement in the direction of arrow f in FIG. 10 ). ) do.

The lifting support unit 51 is a first actuator 54, a first upper support 53f, a vertical column 53e, a cross bar 53a, a vertical connecting bar 53b, a first horizontal beam 53k, a first A transfer holder (53m) is provided.

The first actuator 54 is vertically fixed to the upper surface of the support upper plate 21a and operates by a control signal transmitted from the outside to move the first upper support 53f up and down. In this embodiment, the first vertical actuator 54 is a combination of two in the longitudinal direction and two in the longitudinal direction, so that a total of six is applied. The transverse direction is the longitudinal direction of the transparent tube 11 , and the longitudinal direction is the transport direction of the transparent tube 11 .

The first upper support 53f is a bracket that is fixed to the upper portion of the first actuator 54 and ascends and descends and has an approximately U-shaped shape that is opened upward. A vertical column (53e) is fixed to the bottom surface of both sides of the first upper support (53f). The vertical column 53e is a round bar-shaped member that passes downward through a through hole (21c in FIG. 5) formed in the support upper plate 21a.

The crossbar 53a is a bar-shaped member extending horizontally in the lateral direction, and connects the four vertical pillars 53e. In addition, each cross bar is connected by a vertical connecting bar (53b). All the vertical pillars (53e) are connected by the crossbar (53a) and the vertical connecting rod (53b) constitutes one body. That is, they ascend and descend at the same time.

Two first horizontal beams 53k are fixed to each of the first upper supports 53f. The first horizontal beams 53k are parallel to each other, remain horizontal, and extend in the transport direction of the transparent tube 11 . In addition, each first horizontal beam (53k) is provided with a first transfer holder (53m). The first transfer holder 53m has a plurality of holding grooves 53n open upward. The holding groove 53n is a groove into which the transparent tube 11 is fitted, and forms a predetermined interval. The first transfer holder 53m may be made of synthetic resin.

The lifting and lowering transfer unit 55 has the configuration shown in FIG. 10 . As shown in Figure 10, the lifting and transporting unit 55, a plurality of fixed rails (57d), slider (57c), horizontal transfer plate (57a), second actuator (58), second upper support (56e), It has a vertical column (56c), a crossbar (56a), a vertical connecting rod (56b), a second horizontal beam (56f), a second transfer holder (56h), and a transfer actuator (59).

The fixing rail 57d is a member fixed to the upper surface of the support plate 21a and horizontally extending in the transport direction of the transparent tube, and provides a reciprocating path of the slider 57c. The slider 57c reciprocates while being supported by the fixed rail 57d. The reciprocating motion of the slider (57c) is made by the transfer actuator (59). The fixing rail 57d is located on an extension line connecting the first vertical actuator 54 in the longitudinal direction.

The horizontal transfer plate 57a is fixed to the upper portion of the slider 57c and supports the second actuator 58 . The second actuator 58 is vertically fixed to the horizontal transfer plate 57a and movably supports the second upper support 56e. The second upper support 56e is an approximately U-shaped member that is opened upward and supports the two second horizontal beams 56f. The second horizontal beams 56f are parallel to each other and extend in the transport direction of the transparent tube 11 .

In particular, the width of the second upper support (56e) is relatively wider than the width of the first upper support (53f). Accordingly, as shown in FIG. 8 , the first horizontal beam 53k may be accommodated between the second horizontal beams 56f.

And a second transfer holder 56h is mounted on each of the second horizontal beams 56f. The second transfer holder 56h provides a plurality of holding grooves 56k opened upward. The holding groove 56k is a groove into which the transparent tube 11 is fitted, and forms a predetermined interval. The second transfer holder 56h may be made of synthetic resin like the first transfer holder 53m.

In addition, two vertical pillars (56c) are fixed to the bottom surface of each of the second upper support (56e). The vertical column 56c is a round bar-shaped member penetrating downward through the horizontal transfer plate 57a and the support upper plate 21a. The lower end of each vertical column (56c) is coupled to the crossbar (56a). The crossbar 56a is a rod-shaped member extending in the transverse direction from the lower portion of the support top plate 21a and connects the four vertical pillars 56c. In addition, the crossbar (56a) is connected by two vertical connecting rods (56b). All the second horizontal beams 56f move up and down as one body by the crossbar 56a and the vertical connecting rod 56b.

The transfer actuator 59 is mounted on the support upper plate 21a through the fixed plate 59a and is coupled to a part of the horizontal transfer plate 57a. When the transfer actuator 59 operates, the horizontal transfer plate 57a reciprocates in the direction of the arrow g. The horizontal transfer plate 57a passes through the vertical column 56c, the vertical column is connected to the crossbar 56a, and the crossbar 56a is connected to the vertical connecting rod 56b, so that all the second horizontal beams 56f are, Separately from the lifting movement, it is possible to reciprocate in the direction of the arrow g at the same time.

The transfer principle of the transparent tube 11 through the horizontal transfer unit 50 having the above configuration will be described with reference to FIG. 11 . 11 , the left side view is a view of the first and second transfer holders from the front, and the right side view is a side view.

11A and 11B, both the first transfer holder 53m and the second transfer holder 56h are raised. The holding grooves 53n and 56k provided by the first and second transfer holders, respectively, are positioned on a straight line in the transverse direction and support the transparent tube 11 .

In order to transfer the supported transparent tube 11 one space in the direction of the arrow k, as shown in FIG. 11B , the first transfer holder 53m is lowered. As the first transfer holder 53m descends, the transparent tube 11 is in a state that spans only the second transfer holder 56h.

If the first transfer holder 53m is lowered, the second transfer holder 56h is horizontally transferred in the arrow p direction of FIG. 11B . The transparent tube 11 is actually transferred toward the cutting part 80 according to the transfer of the second transfer holder 56h. The one-time transfer distance of the second transfer holder 56h is n multiples of the spacing between the holding grooves 53n. The transparent tube 11 is transferred by n spaces of the holding groove 53n. For example, two spaces of the holding groove 53n can be transferred at a time.

If the second transfer holder 56h is transferred in the arrow p direction, the lowered first transfer holder 53m is raised again. As the first transfer holder 53m rises, as shown in FIG. 11D , the transparent tube 11 spans the first transfer holder 53m and the second transfer holder 56h at the same time. Next, the second transfer holder 56h is moved horizontally in the arrow r direction after descending in the arrow q direction of FIG. 11E.

If the second transfer holder 56h has moved in the direction of the arrow r, it is vertically raised on the spot. The raised second transfer holder 56h supports the transparent tube 11 together with the first transfer holder 53m.

As the process is repeated, the transfer of the transparent tube 11 is continued, and the transparent tube 11 is cut after reaching the cutting part 80 . As mentioned above, it goes without saying that the transparent tube 11 is heated and stretched while moving toward the cut.

The description will be continued with reference to FIGS. 6 and 7 again.

As shown, a heating unit 40 is provided between the second transfer holders 56h. The heating unit 40 is mounted on the support plate 21a, and heats the central portion in the longitudinal direction of the transparent tube during transport to a plastically deformable state. The central portion of the transparent tube 11 supplied from the supply unit 30 and loaded into the horizontal transfer unit 50 is heated while the transfer starts. The plastically deformable state means a state that can be deformed when an external force is applied.

The heating unit 40 may include a plurality of electric heaters 41 . The electric heater 41 heats the central portion of the transparent tube 11 by generating heat by electric power applied from the outside.

In particular, while the transparent tube 11 passes through the electric heater 41 section, the transparent tube 11 is axially rotated to evenly heat the outer peripheral surface of the transparent tube 11 . A first shaft rotation part 71 is provided for shaft rotation of the transparent tube 11 during heating.

The first shaft rotation unit 71 is illustrated in detail in FIG. 12 .

As shown in FIG. 12 , first shaft rotation units 71 are provided on both sides of the heating unit 40 . The first shaft rotation unit 71 serves to rotate the transparent tube shaft while the transparent tube passes through the heating unit 40 .

The first shaft rotation unit 71 includes a pulley fixing plate 71c, a pulley 72f, a friction belt 73, and a belt driving unit.

The pulley fixing plate 71c is disposed between the first transfer holder 53m and between the second transfer holder 56h and the heating unit 40 as shown in FIG. 7 . The pulley fixing plate 71c is perpendicular to the upper portion of the support upper plate 21a and rotatably supports the pulley 72f. Each pulley 72f supports the friction belt 73 in a state of being supported by the pulley fixing plate 71c so as to be able to circulate. The friction belt 73 circulates along the pulley 72f.

The belt driving unit includes an electric shaft 71e and a motor 71a. The electric shaft (71e) extends horizontally, passes through each pulley fixing plate (71c), and is coupled to the pulley (72f). It goes without saying that the pulley 72f rotates simultaneously with the shaft rotation of the electric shaft 71e. The motor 71a receives a signal from the controller 14 to drive the electric shaft 71e.

The friction belt 73 is in contact with the transparent tube 11 hung on the horizontal transfer unit 50 and applies a frictional force to the transparent tube 11 to cause the transparent tube 11 to rotate. That is, the transparent tube 11 while passing through the heating unit 40 pivotally rotates in a state supported by the friction belt 73, and at this time, the state floating from the bottom surface of the holding grooves 53n and 56k is do. As a result, the transparent tube 11 rotates while passing through the heating part 40, and the outer peripheral surface of the central part is heated evenly throughout and partially melted.

The stretching unit 60 serves to pull both ends of the transparent tube 11 immediately after passing through the heating unit 40 in the direction of the arrow a in FIG. 1D . As it is pulled in the direction of the arrow a, the central partially molten portion 11b is stretched and thinned as described above.

The stretching unit 60 is located on the downstream side of the heating unit 40, and by pulling both ends of the transparent tube in a state in which the central part is heated by the heating unit, the central part, that is, the heated part is stretched and thinned. It is composed of two tensioners 60a. The two tensioners 60a have the same structure and are disposed on opposite sides of the transparent tube with a transport path therebetween.

The tensioner 60a includes a fixing base 61 , an extension actuator 63 , a carriage 62a , a fixing bracket 62b , and a jaw actuator 64 .

The fixture 61 has a guide rail 61a thereon as a structure that provides support. The guide rail 61a extends in the longitudinal direction of the transparent tube 11 and supports the carriage 62a in a linear motion. In addition, a stretching actuator 63 is installed inside the fixing table 61 . The extension actuator 63 slides the fixture 61 .

The fixing bracket 62b supports the jaw actuator 64 while being fixed to the carriage 62a. The fixing bracket 62b and the carriage 62a reciprocate simultaneously as one body. The jaw actuator 64 is an actuator provided with jaws 64a. The jaws 64a move in the vertical direction to open or retract.

The jaws 64a stand by in an open state, and when the end of the transparent tube 11 is positioned between the jaws 64a, it is retracted and fixed by biting the end. The stretching actuator 63 moves the carriage 62a outward in a state in which the jaws 64a hold and fix the transparent tube. That is, the transparent tube 11 is increased. The partially molten portion 11b heated by the action of the stretching actuator 63 is stretched and thinned.

The transparent tube 11 in the stretched state by the stretching unit 60 moves continuously to reach the cutting unit 90 , and is cut at the cutting unit 90 and divided into two pipettes 12 .

13 is a perspective view illustrating the cutting unit 90 shown in FIG. 2 .

The cutting unit 80 includes a second shaft rotation unit 75 , a presser 83 , and a cutter 81 .

The second shaft rotation part 75 has a structure almost similar to that of the first shaft rotation part 71, and serves to support the transparent tube 11 during cutting to prevent the transparent tube 11 from sagging downward and to rotate the shaft. do.

The second shaft rotation unit 75 is illustrated in detail in FIG. 12 . As shown in FIG. 12 , the second shaft rotation unit 75 includes four pulley fixing plates 75c , a pulley 75f , a support belt 76 , an electric shaft 75f , and a motor 75a .

The pulley fixing plate 75c is vertically fixed to the upper portion of the supporting upper plate 21a, spaced apart from each other in parallel, and rotatably supports the pulley 75f. Each pulley 75f supports the support belt 76 in a state of being supported by the pulley fixing plate 75c so as to be able to circulate. The support belt 76 continuously circulates along the pulley 75f.

In addition, the support belt 76 receives and supports the transparent tube 11 transferred by the horizontal transfer unit. The transparent tube 11 is horizontally supported by the support belt 76 and receives frictional force during the circulating motion of the support belt 76 to rotate the shaft.

Each pulley 75f is connected by a power shaft 75h. The electric shaft 75h rotates by receiving rotational force from the motor 75a as a horizontally extending drive shaft.

The presser 83 presses the transparent tube 11 raised on the upper part of the support belt 76 so that the transparent tube 11 receives the rotational force of the support belt and rotates on the spot. The presser 83 has a press cylinder 83b, a lifting block 83d, and a press roller 83e. The pressing cylinder 38b is supported by the support frame 24 and moves the lifting block 83d up and down.

The support frame 24 is a structure fixed to the upper portion of the support top plate 21a, and supports the presser 83 and the cutter 81. The cutter 81 is located at the upper center in the longitudinal direction of the transparent tube 11 , and the presser 83 is installed on the left and right sides of the cutter 81 .

The pressing cylinder (83b) is supported by the support frame (24) and is vertically fixed and moves the lifting block (83d) up and down. The elevating block 83d descends to cut the transparent tube 11 that arrives at the top of the support belt 76, and rises after the cut of the transparent tube 11 is completed.

On both sides of the lifting block 83d, four pressing rollers 83e are installed to allow idle rotation. The pressing roller 83e downwardly supports the transparent tube 11 that has arrived on the support belt 76 . The two pressing rollers 83e support one transparent tube 11 .

The transparent tube 11 is axially rotated by receiving the rotational force of the support belt 76 in a state supported by the pressing roller 83e. Of course, when the shaft of the transparent tube 11 rotates, the pressing roller 83e also rotates at the same time.

The cutter 81 cuts the central part of the transparent tube which pivots in a state downwardly supported by the presser 83 . The central portion is a portion that is pulled and tapered by the stretching portion 60 described above.

The cutter 81 includes a central cylinder 81b, a lifting block 81d, a cutter housing 81e, and a cutter wheel 81f. The central cylinder 81b is vertically supported by the support frame 24 and elevates the lifting block 81d in the vertical direction. The lifting block (81d) is lifted at the same time as the lifting block (83d) of the pressing cylinder.

The cutter housing 81e is fixed to the lower portion of the elevating block 81d and rotatably supports the cutter wheel 81f. The cutter wheel 81f is in contact with the central portion of the transparent tube rotating shaft when the elevating block 81d is lowered, and cuts the central portion. The cutter wheel 81f is a disk-shaped blade having a blade (no reference numeral) installed on its outer circumferential surface.

The transparent tube 11 is discharged along the discharge plate 25 after the central part is cut by the cutter 81 and collected in the collection box 22 . In the collection box 22, a pipette 12 having a spout (12a in FIG. 1) is collected.

As mentioned above, although the present invention has been described in detail through specific embodiments, the present invention is not limited to the above embodiments, and various modifications are possible by those of ordinary skill within the scope of the technical spirit of the present invention.

11: Transparent tube 11a: Central part 11b: Partially melted part
12: pipette 12a: spout 14: controller
20: cutting device 21: table 21a: support top plate
21c: through hole 22: collection box 24: support frame
25: discharge plate 30: supply part 31a: inclined plate
31b: alignment plate 31d: descending guide plate 31e: descending guide plate
31g: inner support plate 31h: passage 32a: exhaust actuator
32b: Electric link 32c: Horizontal bar 32f: Swing plate
33: supporter 40: heating unit 41: electric heater
50: horizontal transfer unit 51: elevating support unit 53a: crossbar
53b: vertical connecting rod 53e: vertical column 53f: first upper support
53k: First horizontal beam 53m: First transfer holder 53n: Holding groove
54: first actuator 55: elevating transfer unit 56a: crossbar
56b: vertical connecting rod 56c: vertical column 56e: second upper support
56f: second horizontal beam 56h: second transfer holder 56k: holding groove
57a: horizontal transfer plate 57d: fixed rail 58: second actuator
59: transfer actuator 59a: fixed plate 60: stretching part
60a: tensioner 61: fixture 61a: guide rail
62a: reciprocating table 62b: fixing bracket 63: extension actuator
64: jaw actuator 64a: jaw 71: first shaft rotation part
71a: motor 71c: unscrew fixed plate 71e: electric shaft
72f: pulley 73: friction belt 75: second shaft rotating part
75a: motor 75c: pulley fixed plate 75f: pulley
75h: electric shaft 76: support belt 80: cutting part
81: cutter 81b: central cylinder 81d: elevating block
81e: cutter housing 81f: cutter wheel 83: presser
83b: press cylinder 83d: elevating block 83e: press roller

Claims (4)

delete a table having a horizontal support plate; a supply part installed on the upper part of the support plate, accommodating a transparent tube of a certain length input from the outside, and supplying one by one to the downstream side; a horizontal transfer unit for receiving the transparent tube supplied from the supply unit, horizontally supporting the transparent tube, and transporting the supported transparent tube in a direction perpendicular to the longitudinal direction of the transparent tube; a heating unit installed on the table and heating the central portion in the longitudinal direction of the transparent tube during transport to a plastically deformable state; a stretching part located on the downstream side of the heating part, holding both ends of the transparent tube in a state in which the central part is heated by the heating part, and pulling it, so that the central part is stretched and thin; and a cutting unit for cutting the central portion of the transparent tube that has passed through the stretching unit,
the supply unit; A supporter fixed to a support plate and providing support, a sloping plate mounted on the upper part of the supporter, supporting a transparent tube and inclined downward toward the horizontal transfer unit, and erected vertically on the left and right sides of the swash plate, the transparent tube An alignment plate for preventing longitudinal movement, a horizontal bar having both ends pivotally supported by the alignment plate, and a swing positioned on the upper portion of the swash plate with the upper end fixed to the horizontal bar, and passing a transparent tube between the swash plate and the swash plate A plate and a discharge actuator that rotates the horizontal bar in both directions to guide the supply of the transparent tube to the swing plate,
The horizontal transfer unit; A plurality of first actuators that are vertically fixed to the upper surface of the support plate, a first upper support supported by each first actuator and raised and lowered by the operation of the first actuator, horizontally fixed to the first upper support and transport of a transparent pipe A plurality of first horizontal beams extending in the direction and spaced apart in parallel to each other, a lifting support part having a first transport holder fixed on the upper part of the first horizontal beam and having a holding groove into which a transparent tube is inserted is formed at regular pitch intervals; , a plurality of fixed rails fixed to the upper surface of the support upper plate and extending in the transport direction of the transparent tube, a horizontal transfer plate supported slidably on the fixed rail, a second actuator installed vertically on the horizontal transfer plate, a second actuator A second upper support supported and moved up and down, a second horizontal beam fixed horizontally to the second upper support and parallel to the first horizontal beam, a holding groove mounted on the upper part of the second horizontal beam and into which a transparent tube is fitted A second transfer holder formed at a pitch interval, including a lifting transfer unit provided with a transfer actuator for sliding and reciprocating all horizontal transfer plates at the same time,
Transparent tube cutting device for pipettes. 3. The method of claim 2,
the heating unit;
It is located below the central portion of the longitudinal direction of the transparent tube transferred by the horizontal transfer unit, and includes a heater that applies heat to the central portion of the transparent tube,
On both sides of the heating part, a plurality of pulley fixing plates spaced parallel to each other and vertically fixed on the support plate, a plurality of pulleys rotatably mounted on the pulley fixing plate, which rotates the transparent tube while the transparent tube passes through the heating part , a friction belt that circulates along the pulley and partially contacts the transparent tube supported by the horizontal transfer unit and applies friction to cause the transparent tube to rotate axially; One-axis rotating part is installed,
The stretching unit;
A fixture mounted on a support plate, a carriage supported on the fixture and capable of sliding in the longitudinal direction of the transparent tube, an extension actuator that slides the carriage, and a jaw mounted vertically on the carriage and fixed by biting the end of the transparent tube A pair of tensioners including a jaw actuator are included, and the tensioners are disposed corresponding to opposite sides with the transfer path of the transparent tube interposed therebetween.
Transparent tube cutting device for pipettes. 4. The method of claim 3,
A support frame for providing support is mounted on the upper portion of the support plate,
the cutting unit;
A plurality of pulley fixing plates fixed vertically on the upper part of the support plate, a plurality of pulleys rotatably supported on the pulley fixing plates, a transparent tube filled with the pulley and circulating along the pulley, supporting and supporting the transparent tube transferred by the horizontal transfer unit a second shaft rotating part including a motor for circulating the support belt by driving the support belt and the pulley;
The transparent tube is installed on the lower part of the press cylinder mounted on the support frame, the lifting block elevating by the press cylinder, and the lifting block is lowered, and the transparent tube mounted on the support belt is supported downward with the support belt. A presser having a plurality of press rollers that receive rotational force from the support belt and rotate the shaft;
It is installed on the side of the presser and cuts the central part of the axially rotating transparent tube, a central cylinder mounted on a support frame, a lifting block that moves up and down by the central cylinder, a cutter housing fixed to the lower part of the lifting block, and a cutter housing A cutter having a disc-shaped cutter wheel that is rotatably supported on the and performs cutting on the central part of the transparent tube that rotates when the lifting block is lowered is included.
Transparent tube cutting device for pipettes.

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