JP2010048175A - Roller pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate attachment and detachment of a tube in a roller pump wherein liquid in the elastic tube is supplied by drawing the tube while squeezing the tube by a pressing roller. <P>SOLUTION: The roller pump is provided with a plurality of the pressing rollers 22 having the same dimension and pivotally supported by a rotating disk 20, and a cassette 30 having a cylindrical surface 30' confronting at least two of the pressing rollers. The elastic tube is inserted between the cylindrical surface 30' of the cassette 30 and the pressing roller 22, the rotating disk 20 is rotated while squeezing the elastic tube by the pressing roller, and the liquid in the tube is made to flow. The cassette 30 is slidably attached to a base plate 10, squeezes the tube in the position nearest to the pressing roller 22, and is automatically locked to the base plate 10 by a locking mechanism, and the cassette 30 is automatically separated from the pressing roller 22 when locking is released, and attachment/detachment of the tube is possible. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a roller pump, and more particularly, to a roller pump that feeds liquid in an elastic tube by squeezing the tube with a pressing roller, and in particular, mounting the tube. The present invention relates to a roller pump that can be easily removed.

FIG. 6 is a schematic diagram of a main part for explaining an example of a roller pump to which the present invention is applied. FIG. 6 (A) is a cross-sectional view taken along line AA in FIG. 6 (B), and FIG. 6A is a sectional view taken along line BB in FIG. 6A. In the figure, 1 is a motor, 2 is a rotating shaft of the motor, 10 is a substrate, 20 is a rotating disk, and the motor 1 is fixed to the substrate 10 side. The rotation shaft 2 of the motor 1 is inserted and fixed in a non-rotatable manner in a hole provided in a guide portion 21 (a guide projection for the substrate 10) of the rotating disk 20. The rotating disk 20 has a plurality of equal-sized pressing rollers 22 on a circumference coaxial with the guide portion (rotating shaft) 21 of the rotating disk 20 (in the example of FIG. 6A). six pressure rollers (22 ₁ to 22 ₆₎ is axially supported rotatably at 60 intervals °). Reference numeral 30 denotes a cassette that is detachably mounted on the substrate 10. The cassette 30 is coaxial with the rotating shaft 21 of the rotating disk 20, and has at least a cylindrical surface 30 ′ opposed to the two or more pressing rollers 22. And an elastic tube 40 for liquid transportation is interposed between the cylindrical surface 30 ′ and the pressing roller 22.

  Specifically, the elastic tube 40 is disposed along the pressing roller 22, and the cylindrical surface 30 ′ of the cassette 30 is placed thereon, and the cassette 30 is fixed to the substrate 10 with a bolt 31 or the like. As shown in the figure, an elastic tube 40 is interposed between the cylindrical surface 30 'and the pressing roller 22, and the elastic tube 40 is pressed by at least two pressing rollers 22, and the liquid is sealed between them. By rotating the rotating disk 20, the liquid confined between the two pressing rollers is handled with the elastic tube 40 being crushed by the two pressing rollers, and the liquid confined between the rollers is removed. Send it out.

  As described above, in the roller pump, the elastic tube is squeezed from the outer diameter side by the pressing roller to push out the fluid. However, since the cassette is fixed to the substrate with a bolt or the like, the tube At the time of loading / unloading, it was necessary to remove and install the bolts one by one.

  The present invention has been made in view of the above circumstances, and is provided with a lock mechanism for locking the cassette to the substrate, and the cassette is automatically separated from the pressing roller simply by unlocking the lock mechanism. The tube can be inserted / removed, and the cassette is automatically locked to the substrate simply by pressing the cassette toward the pressing roller, and the tube is mounted and pressed between the pressing roller and the cassette. It is made to be done.

  The invention of claim 1 is a rotating disk, a plurality of pressure rollers of the same size that are rotatably supported on a circumference coaxial with the rotation axis of the rotating disk, and the plurality of pressure rollers being supported A substrate on which a rotating disk is rotatably mounted, and a cassette that is slidably mounted on the substrate and has a cylindrical surface that is coaxial with the rotating shaft and faces at least two pressing rollers, An elastically deformable tube is disposed between the cylindrical surface and the pressing roller, and the rotating disk is rotated while the tube is being crushed by the cylindrical surface and the pressing roller, so that the liquid in the tube is transferred to one side. A roller pump for feeding from one side to the other side has a lock mechanism for locking the cassette with respect to the substrate, and the lock mechanism slides the substrate against the pressing roller. Closest place The cassette is automatically locked to the substrate to crush the tube, and when the lock is released, the cassette is slid to be automatically separated from the pressure roller, and the separated pressure roller. The tube can be inserted and removed through a gap between the cylindrical surface and the cylindrical surface.

  According to a second aspect of the present invention, in the first aspect of the present invention, a spring is provided between the substrate and the cassette, the cassette is pressed against the extension force of the spring and locked to the substrate, and the lock When is released, the spring is separated from the pressing roller by the extension force of the spring.

  According to a third aspect of the invention, in the first or second aspect of the invention, the substrate constitutes a casing, the cassette constitutes a part of a lid of the casing, and the cassette slides relative to the substrate. Thus, the lid portion of the cassette is opened and closed.

  When inserting / removing the elastic tube between the pressing roller and the cylindrical surface of the cassette, the cylindrical surface can be separated from the pressing roller simply by releasing the locking mechanism. The tube can be mounted between the cylindrical surface and the elastic roller simply by pushing the cassette after the tube is mounted.

  FIG. 1 is an external view for explaining an embodiment of a roller pump according to the present invention. In FIG. As described with reference to FIG. 6, the rotating disk 20 is rotatably attached to the substrate 10, and the rotating disk 20 includes a rotating shaft 21. A plurality of rollers 22 of the same size are arranged at equal intervals on a concentric circle. Reference numeral 30 denotes a cassette (movable side member) having a cylindrical surface 30 ′ facing the pressing roller and having a lid portion constituting a part of the lid of the casing constituted by the substrate 10. The cylindrical surface 30 ′ cooperates with the pressing roller 22 to sandwich the elastic tube 40, and rotates the rotating disk 20 to deliver the liquid in the tube 40. Is the same as the conventional roller pump described above.

  Thus, in the conventional roller pump, the bolt 31 is used to attach the cassette 30 to the substrate 10, and when the tube 40 is inserted and removed, the bolt 31 must be removed or attached. The work was hard.

The present invention has been made to solve the such disadvantages According to the process 30, 1, 11 (11 _1, 11 ₂₎ in order to lock the cassette 30 (the movable member) to the substrate 10 (fixed side member) in the lock lever, the cassette 30 is at all times, is locked in the state shown in FIG. 1, will function exactly as a conventional roller pump, when you want to exchange tube 40, the lock lever 11 (11 _1, 11 ₂ ) In the direction of arrow A (push between the thumb of one hand and the other finger), the lock mechanism can be unlocked, and the cassette 30 automatically (by extension force such as a spring) It moves in the direction of arrow C (slids on the substrate 10) and moves away from the pressing roller, the cover of the housing is opened, and the tube 40 can be inserted and removed.

FIG. 2 is a main part configuration diagram for explaining a locking mechanism in the roller pump shown in FIG. 1, and FIG. 2 (A) is a state when the cassette 30 is locked to the substrate 10 (use shown in FIG. 1). FIG. 2B is a view of the state when the cassette 30 is removed from the front side, and FIG. 2B shows the state when the lock is released (the state when the cassette 30 slides on the substrate 10 and moves upward). ) Is viewed from the back side with the back plate portion of the substrate 10 removed, in which 11 (11 ₁ , 11 ₂ ) denotes a lock lever (the lock lever shown in FIG. 1), and the lock lever 11 is , Provided on the substrate 10 (fixed portion side) and pressed in the direction of arrow B by the extension force of the springs 12 (12 ₁ , 12 ₂ ). 33 (33 ₁ , 33 ₂ ) is an operating rod (sliding rod) provided integrally with the cassette 30 (movable part side), and the lower portion of the operating rod 33 is provided with a spring 50 (50 ₁ , 50 ₂ ). And is slidable with respect to the substrate 10 in the vertical direction (directions of arrows C and D).

The upper and lower portions of the operating rod (sliding rod) 33 (33 ₁ , 33 ₂ ) are engaged with the lock lever 11 (11 ₁ , 11 ₂ ), and the operating rod 33 (accordingly, the cassette 30). Stopper portions 33a and 33b for restricting the vertical movement are provided, and the operating rod (sliding rod) 33 is movable between the upper and lower stopper portions 33a and 33b in the vertical direction (directions of arrows C and D). It has become. Further, the operating rod 33 (33 ₁ , 33 ₂ ) is engaged with the operating rod 33 on the surface facing the moving direction (arrow A, B direction) of the lock lever 11, and the operating rod 33 is engaged. Therefore, grooves 33c for locking the movement of the cassette 30 are provided, and a surface 33d continuing downward from the lock grooves 33c is provided to be inclined outward.

Accordingly, when the lock lever 11 (11 ₁ , 11 ₂ ) is pushed in the direction of arrow A against the extension force of the spring 12 (12 ₁ , 12 ₂ ) in the locked state shown in FIG. 11 and the lock groove 33c of the operating rod 33 are disengaged, and the cassette 30 is pushed up in the direction of arrow C by the extension force of the spring 50 (50 ₁ , 50 ₂ ), and the state shown in FIG. In this state, the cylindrical surface 30 ′ of the cassette 30 and the pressing roller 22 are sufficiently separated from each other, whereby the tube 40 can be inserted and removed.

In the state shown in FIG. 2B, the tube 40 is mounted, and after the mounting, when the upper portion of the cassette 30 is pushed downward (in the direction of arrow D) against the extension force of the spring 50, the cassette 30 is moved in the direction of arrow D (in the direction of arrow D). The lock lever 11 (11 ₁ , 11 ₂ ) moves to the extension force of the spring 12 (12 ₁ , 12 ₂ ) by the inclined surface 33d of the operating rod (31 ₁ , 31 ₂ ). When the spring 12 is compressed in the direction of arrow A and reaches the lowermost end, the lock lever 11 (11 ₁ , 11 ₂ ) is actuated by the extension force of the spring 12 (12 ₁ , 12 ₂ ). (33 ₁ , 33 ₂ ) is engaged with the lock groove 33c (the state shown in FIG. 2A), and the cassette 30 is locked in this state and functions as a roller pump in this state.

  FIG. 3 is an external view for inventing another embodiment of the roller pump according to the present invention. The roller pump shown in FIGS. 1 and 2 is the same except for the locking mechanism. Parts having the same functions as those of the roller pump shown in FIG. 1 and FIG.

FIG. 3 shows a state when the cassette is locked. In FIG. 3, reference numeral 71 denotes a lock bar provided in the cassette 30. By operating the lock bar 71, for example, by pulling up the lock bar 71, the cassette 30 is shown. Is pushed upward (by the extension force of the spring acting in the same manner as the springs 50 ₁ and 50 ₂ shown in FIG. 2), and the cylindrical surface 30 ′ of the cassette 30 is separated from the pressing roller 22 as described above. It is a thing.

4A shows the state when the cassette 30 is lifted upward after releasing the lock, and FIG. 4B is a view seen from the front side of the roller pump. FIG. It is a nail. The lock claw 72 is always pushed in the locking direction (substrate 10 direction) from the rear together with the lock lever 71 by the spring, and when the lock lever 71 is pulled up, the lock is released and the cassette 30 (the lid) is opened. It is like that. With the lid open (that is, the state shown in FIG. 4), the tube 40 is inserted. After inserting the tube, the cassette 30 is moved from above to the spring 50 (the springs 50 ₁ and 50 ₂ shown in FIG. 2B). The cassette 30 is locked to the substrate 10 by being pushed down against the corresponding stretching force. Note that there is a stopper that engages with the substrate 10 below the cassette 30, for example, below the sliding rods 33 (33 ₁ , 33 ₂ ), when the lock is released and the cassette 30 moves upward. The upper limit position is regulated. Although not shown in FIG. 4 as described above, a spring (corresponding to the spring 50 shown in FIG. 2) is provided below the cassette 30 so as to push the cassette 30 upward. The spring is compressed to give a force to move the cassette 30 upward, and when the lock is released, the cassette 30 is pushed upward.

5 is a diagram for explaining details of the lock mechanism shown in FIG. 4, and FIG. 5A is a perspective view showing a state in which the lever 71 and the lock claw 72 shown in FIG. 4 are integrally formed. The lever 71 is integrally attached to the cassette 30 so as to be rotatable by a pin passing through the pin hole 73. FIG. 5B is a cross-sectional view of the main part for explaining the locking operation. As described above, the lever 71 is rotatably attached to the cassette 30. cassette 30 and is pressed to the substrate 10 side by a spring 74 (74 _1, 74 ₂₎ interposed between the lock pawl 72 (arrow a) is the tip of the lever 71 (71 ₁ ', 71 ₂ ′) Is engaged with the lock claw 72, whereby the lever 71 is simultaneously pushed toward the substrate 10 (arrow A). The substrate 10 side, the locking pawl 72 and the engaging hole (rectangular) 10 ₁ is provided, of the lock claw 72 into the hole 10 ₁ of the opening (lock hole) tip 10 ₁ of the upper wall ' The tip is engaged.

Therefore, the lever 71 provided integrally with the cassette 30 pushes down the lever 71 together with the cassette 30 (against the extension force of the spring that acts similarly to the springs 50 ₁ and 50 ₂ shown in FIG. 2). When the lock claw 72 reaches the opening 10 ₁ (lock hole), the tip of the lock claw 72 enters the lock hole 10 ₁ , and the cassette 30 30 is locked in that position, and in this state, the tube 40 is pressed and clamped between the pressing roller 22 and the cylindrical surface 30 '.

In time of replacing the like of the tube 40, when pulled against the lever 71 to the expansion force of the spring 73, the locking pawl 72 is moved forward (B direction) together with the lever 71, the locking pawl 72 away from the lock hole 10 ₁ rises to the upper position (which is regulated by a stopper) by stretching force of the spring (50 _1, 50 _2), the cylindrical surface 30 of the cassette 30 'is the state shown in FIG. 4 away from the pressing roller 22 (a) The tube 40 can be inserted and removed.

  As described above, according to the present invention, the lock lever (example shown in FIGS. 1 and 2) provided on the substrate side (fixed side) of the roller pump or the cassette side (movable side) is provided. The cylinder surface of the cassette can be separated from the pressure roller by operating the lock lever (example shown in FIGS. 3 to 5) with one hand or with one finger. The tube can be inserted or removed, and after inserting the tube, the tube can be mounted between the cylindrical surface and the pressure roller simply by pushing down the cassette. Can be done easily.

  Although two different types of locking mechanisms have been described above, the present invention is not limited to the illustrated locking mechanism, and various other locking mechanisms can be used as long as the locking mechanism operates as described above. It will be readily understood that it can be used.

It is an external view for demonstrating one Example of the roller pump by this invention. It is a figure for demonstrating the locking mechanism in the roller pump shown in FIG. It is an external view for demonstrating the other Example of the roller pump by this invention. It is a figure for demonstrating the locking mechanism of the roller pump shown in FIG. It is a figure for demonstrating the detail of the locking mechanism shown in FIG. 3, FIG. It is a figure for demonstrating the principle of operation of the roller pump to which this invention is applied.

Explanation of symbols

1 ... Motor, 2 ... motor rotation shaft, 10 ... substrate, 11 (11 _1, 11 ₂₎ ... lock lever 12 (12 _1, 12 ₂₎ ... lock lever spring, 20 ... rotary disk, 21 ... rotary disk Rotating shaft of plate, 22 (22 _{1 to} 22 ₆ ) ... pressing roller, 30 ... cassette, 30 '... cylindrical surface of cassette 30, 31 ... mounting bolt, 33 (33 ₁ , 33 ₂ ) ... sliding rod, 40 ... Elastic tube, 50 (50 ₁ , 50 ₂ )... Cassette moving spring, 71... Lock lever, 72.

Claims (3)

  A rotating disk, a plurality of pressure rollers of the same size that are rotatably supported on a circumference coaxial with the rotation axis of the rotating disk, and the rotating disk on which the plurality of pressing rollers are supported are rotatable. And a cassette having a cylindrical surface that is slidably mounted on the substrate and that is coaxial with the rotating shaft and has at least two cylindrical surfaces facing the pressing roller, and the cylindrical surface and the pressing roller An elastically deformable tube is arranged between the two, and the rotating disk is rotated while the tube is crushed by the cylindrical surface and the pressing roller, so that the liquid in the tube is sent from one side to the other side. The roller pump is configured to have a lock mechanism for locking the cassette with respect to the substrate, and the lock mechanism is located at a position where the cassette slides on the substrate and is closest to the pressing roller. Before The tube is automatically locked to the substrate to crush the tube, and when the lock is released, the substrate is slid and automatically separated from the pressure roller, and the separated pressure roller and the cylindrical surface A roller pump characterized in that the tube can be inserted and removed through the gap.   A spring is provided between the substrate and the cassette, and the cassette is pressed against the extension force of the spring and locked to the substrate, and when the lock is released, the pressing roller is applied by the extension force of the spring. The roller pump according to claim 1, wherein the roller pump is separated from the roller pump.   The substrate constitutes a housing, the cassette constitutes a part of a lid of the housing, and the lid portion of the cassette is opened and closed by sliding the cassette relative to the substrate. The roller pump according to claim 1 or 2.

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