JP2019210858A - Tube pump - Google Patents

Abstract

To provide a tube pump which can be stably transported with a simple structure.SOLUTION: A tube pump 10 presses a flexible tube T to supply a fluid. The tube pump 10 includes a pressing member 45 which conducts pressing operation in conjunction with rotary motion of a cam mechanism 40 to press the tube T. The pressing member 45 is formed into a columnar shape having the pressing part 455 for pressing the tube T at one end on the tube T side, and the pressing part 455 is formed into a wedge shape in which a tip ridge 455a extends in a tube T transverse direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tube pump.

  2. Description of the Related Art Conventionally, a tube pump for conveying a liquid supplied into a tube has been provided. For example, Patent Document 1 has a pressing unit that presses the tube in a direction substantially orthogonal to the tube at least in three portions along the length direction, and sequentially executes pressing and release of the pressing member. A tube pump is disclosed.

JP-A-8-170590

  However, in the tube pump disclosed in Patent Document 1, the plate surface of the leaf spring is brought into contact with the tube to press the tube. For this reason, it is difficult to reliably crush the space in the tube and to stably carry the liquid in the tube.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a tube pump that can be stably conveyed with a simple configuration.

  In order to achieve the above object, a tube pump according to the present invention is a tube pump that presses a flexible tube and supplies a fluid, and presses the tube in conjunction with a rotational movement of a cam mechanism to move the tube. A pressing member for pressing is provided, and the pressing member has a columnar shape having a pressing portion for pressing the tube at one end on the tube side.

According to the present invention, the pressure member includes a pressing member that presses and presses the tube in conjunction with the rotational movement of the cam mechanism, and the pressing member has a columnar shape having a pressing portion that presses the tube at one end on the tube side. Therefore, it is possible to provide a tube pump that can be stably transported with a simple configuration such that the space in the tube can be crushed by a columnar pressing portion and reliably blocked.

If the pressing portion has a wedge shape in which the tip ridge extends in the transverse direction of the tube, the space in the tube can be further crushed and blocked.
If the pressing member has a pressed portion that engages with the cam mechanism at the other end of the tube, and the pressed portion has a concave groove that engages with the cam mechanism, The liquid can be transported more stably by preventing rotation around the axis.

If the concave groove is provided with a rotating body in contact with the peripheral end of the cam mechanism in the concave portion of the concave groove, the rotating body acts to further reliably rotate the cam mechanism.
The rotating body is rotatably supported by a shaft body provided so as to be suspended between the inner side surfaces of the concave portion of the concave groove, and a peripheral end of the cam mechanism is engaged with the concave groove. However, it can contact the outer peripheral surface of the rotating body.

The guide member includes a guide member that guides the pressing operation of the pressing member, and a resilient member that projects in a direction in which the other end side where the pressed portion of the pressing member is formed and the guide portion are separated. Thus, the return operation after the pressing operation of the pressing member can be performed smoothly.

The guide portion has a guide hole that guides the pressing operation of the pressing member, the pressed portion of the pressing member has a protruding shape with an outer diameter expanded, and the elastic member The lower surface side of the protruding shape of the pressed portion and the upper surface side of the guide portion and the peripheral edge of the guide hole can be repelled in a separating direction.
The resilient member may be a leaf spring.

Provided with a base portion on which a buffer member having elasticity is arranged, and the tube is arranged between the pressing member and the buffer member, the tube T is reduced while reducing the wear of the tube. The inside can be reliably shut off.

  According to the present invention, it is possible to provide a tube pump that can be stably conveyed with a simple configuration.

It is a front view of the tube pump which concerns on Embodiment 1 of this invention. It is a side view of the tube pump which concerns on Embodiment 1 of this invention. It is a figure which shows the side surface of the cam part which concerns on Embodiment 1 of this invention, (a) shows a 1st cam part, (b) shows a 3rd cam part, (c) shows a 2nd cam part. It is a figure which shows the press member which concerns on Embodiment 1 of this invention, (a) is a front view of a 1st press member and a 2nd press member, (b) is a side surface of a 1st press member and a 2nd press member. It is a figure and (c) is a front view of a 3rd press member. It is a figure which shows the bearing which concerns on Embodiment 1 of this invention. It is a transition diagram which shows operation | movement of the cam mechanism which concerns on Embodiment 1 of this invention. It is an external appearance schematic diagram which shows operation | movement of the press member which concerns on Embodiment 1 of this invention. It is a front view of the tube pump which concerns on Embodiment 2 of this invention. It is a side view of the tube pump which concerns on Embodiment 2 of this invention. It is a bottom view of the tube pump which concerns on Embodiment 2 of this invention.

  Hereinafter, embodiments of the present invention will be described. FIG. 1 is a front view of the tube pump 10, and FIG. 2 is a side view of the tube pump 10 as viewed from the left side. The tube pump 10 includes a base part 20, a guide part 30, and a cam mechanism 40. The tube pump 10 places the tube T indicated by a two-dot chain line between the base portion 20 and the guide portion 30 and drives the cam mechanism 40 to press the tubes T in a predetermined order by the pressing member 45. The liquid (fluid) in the tube T can be transported. The tube T is formed of a cylindrical flexible material. Therefore, when a load is applied to the tube T from the outside, the tube T can be deformed so that the internal space is crushed, and in an unloaded state, the tube T can be returned to a cylindrical shape by a resilient force.

  The base 20 is formed by a front plate 21, a rear plate 22, and a top plate 23 in a substantially frame shape that opens downward in a side view of FIG. In FIG. 1, a protrusion 231 having a substantially rectangular cross-sectional view is formed on the upper surface 23 a of the base 20 across the left-right direction of the base 20. The protruding portion 231 can be formed as a block-shaped member, a plate-shaped member, a thin-plate-shaped shim, a boss, or the like using a metal such as aluminum or stainless steel. On the upper surface 231a of the protruding portion 231, a buffer member 24 having elasticity such as urethane on which the tube T is placed is disposed in the left-right direction. Further, the upper surface position of the buffer member 24 can be arbitrarily set by changing the height of the protrusion 231. The protrusion 231 and the buffer member 24 are positioned by inserting a positioning protrusion 25 standing upward from the top plate 23. The positioning protrusions 25 are disposed on the front side and the rear side of the tube T.

  The guide portion 30 has a substantially rectangular parallelepiped shape that is long on the left and right sides, and a part of the guide portion 30 is formed in a substantially L shape extending forward in a side view in FIG. A base portion 31 on the rear side of the guide portion 30 is connected to the base portion 20, and a housing portion 33 that is a space for housing the tube T is formed between the bulging portion 32 on the front side and the base portion 20. The The tube T housed in the housing portion 33 in the left-right direction is restricted in vertical movement by the top plate 23 and the bulging portion 32 or the top plate 23 and the lower end of each pressing member 45. Further, the longitudinal movement of the tube T accommodated in the accommodating portion 33 is restricted by the front and rear positioning protrusions 25.

  Guide holes 321, 322, and 323 are formed in the bulging portion 32 so as to penetrate vertically. Each guide hole 321, 322, 323 is disposed above the buffer member 24 disposed in the left-right direction in FIG. 1 and at a position different from the standing position of the positioning protrusion 25.

  The cam mechanism 40 includes side plates 41, 42 extending upward from the guide portion 30, a cam shaft 48 having a shaft portion 44 in which a plurality of cam portions 43 are intermittently arranged, and a cam portion 43 that moves up and down by the cam portion 43. And a pressing member 45 for pressing T and releasing the pressing.

  The shaft portion 44 is rotatably inserted into bearings provided on the side plates 41 and 42. A substantially cylindrical shaft coupling 46 that connects the shaft portion 44 and a motor shaft (not shown) is connected to an end portion 441 of the shaft portion 44 that penetrates one side plate 42. An end portion 441 of the shaft portion 44 is inserted into a bearing 461 in the shaft coupling 46 and is fixed to the shaft coupling 46 by a set screw (not shown) from a screw hole 462 provided on the outer peripheral surface of the shaft coupling 46.

  The shaft coupling 46 has a motor shaft bearing 463 formed on the opposite side of the bearing 461. The bearing 461 and the bearing 463 are formed to be coaxial.

  A support plate 47 that is substantially L-shaped when viewed from the front in FIG. 1 is formed outside the side plate 42. The support plate 47 extends from the lower position of the shaft coupling 46 to the outside of the side plate 42 and then extends so as to bend upward. The support plate 47 has an opening 471 through which the motor shaft is inserted. The support plate 47 has an opening hole 472 for fastening a fastener for fixing the motor. The motor shaft inserted through the opening 471 is inserted into the bearing 463 and fixed to the shaft coupling 46 from the screw hole 462 by a set screw (not shown).

  The shaft portion 44 is provided with a first cam portion 43A, a second cam portion 43B, and a third cam portion 43C. Each cam part 43A-43C has the substantially cylindrical fixing | fixed part 431 connected with the surface of one side. In each of the cam portions 43 </ b> A to 43 </ b> C, the shaft portion 44 is inserted into a bearing provided continuously with the fixing portion 431, and a set screw (not shown) is screwed through a screw hole 432 provided on the outer peripheral surface of the fixing portion 431. As a result, the shaft portion 44 can be fixed.

  Here, the outer peripheral structure of each cam part 43 is demonstrated. FIG. 3A is a right side view of the first cam portion 43A. FIG. 3C is a right side view of the second cam portion 43B. The first cam portion 43A and the second cam portion 43B have a base diameter R1 and a lift diameter R2. The standby angle θ1 at which the base diameter R1 is formed is set smaller than the operating angle θ2 at which the lift diameter R2 is formed. Further, the first cam portion 43A and the second cam portion 43B rotate in the clockwise direction in FIGS. 3A and 3C, and the rising angle θ21 from the base diameter R1 toward the lift diameter R2 is the lift diameter. It is set larger than the descending angle θ23 returning from R2 to the base diameter R1. Further, the stationary angle θ22 in the operating angle θ2 is set larger than the standby angle θ1.

In the present embodiment, when the first cam portion 43A and the second cam portion 43B are fixed to the shaft portion 44, they are arranged so that the phases of the rotation angles are different.

  FIG. 3B is a right side view of the third cam portion 43C. The third cam portion 43C has a base diameter R1 and a lift diameter R2. The standby angle θ1 at which the base diameter R1 is formed is set larger than the operating angle θ2 at which the lift diameter R2 is formed. Further, the third cam portion 43C rotates clockwise in FIG. 3B, and the rising angle θ21 from the base diameter R1 to the lift diameter R2 is substantially the same as the downward angle θ23 returning from the lift diameter R2 to the base diameter R1. The same angle is set. Further, the stationary angle θ22 in the operating angle θ2 is set larger than the standby angle θ1.

  Returning to FIG. 1, the first pressing member 45A, the second pressing member 45B, and the third pressing member 45C are disposed below the first cam portion 43A, the second cam portion 43B, and the third cam portion 43C, respectively. The pressing operation can be performed in conjunction with the rotation operation of the mechanism 40. In addition, the first pressing member 45A, the second pressing member 45B, and the third pressing member 45C are inserted through the guide holes 321, 322, and 323 so as to be vertically movable. The operation of the first pressing member 45A, the second pressing member 45B, and the third pressing member 45C according to the positional relationship of the first cam portion 43A, the second cam portion 43B, and the third cam portion 43C with respect to the shaft portion 44 is shown in FIGS. 7 will be described later.

  FIG. 4A is a front view of the first pressing member 45A and the second pressing member 45B, and FIG. 4B is a side view of the first pressing member 45A and the second pressing member 45B. 45 A of 1st press members and the 2nd press member 45B have the main-body part 451 of the substantially cylindrical shape as a whole. The first pressing member 45 </ b> A and the second pressing member 45 </ b> B have a substantially short columnar pressed portion 452 whose outer diameter expands and protrudes on the upper end side that is the cam portion 43 side of the main body portion 451. An engaging portion 452a that engages with a leaf spring S1 that is a resilient member is formed on the lower surface side of the protruding shape of the pressed portion 452.

  As shown in FIG. 2, the leaf spring S1 is formed in a flat plate shape. The leaf spring S1 is in contact with the upper surface 32a side of the guide portion 30 and extends in the horizontal direction, the bending portion S12 extending so as to incline upward while bending from one end side of the lower plate portion S11, and the bending portion An upper plate portion S13 extending in the horizontal direction from the upper end portion of S12, and an inclined plate portion S14 extending from the upper plate portion S13 so as to incline downward while being bent and having a tip extending in the horizontal direction and contacting the lower plate portion S11. And have. Moreover, the hole through which the pressing member 45 is inserted is formed in the lower plate portion S11 and the upper plate portion S13 (not shown).

  The leaf spring S1 is disposed with the pressing members 45A to 45C inserted between the engaging portion 452a and the upper surface 32a of the bulging portion 32, and the engaging portion 452a and the upper surface 31a (guide holes 321 and 322). , 323, the peripheral edge) is projecting away. The lower plate portion S11 side is formed as a fixed end and the inclined plate portion S14 side is formed as a free end, so that the plate surface of the upper plate portion S13 is configured to urge the engaging portion 452a upward by elastic force. Is done.

  Instead of the leaf spring S1, a leaf spring in which a flat plate member is bent in a dogleg shape (or L shape) may be arranged. The U-shaped leaf spring includes a lower plate portion that abuts on the upper surface 32a side of the guide portion 30 and extends in the horizontal direction, and a bent portion that extends upward while bending in a dog-leg shape from one end side of the lower plate portion. And an upper plate portion extending in the horizontal direction from the upper end portion of the bent portion. Further, like the leaf spring S1, the dog-shaped leaf spring includes a hole through which the pressing member 45 is inserted in the lower plate portion and the upper plate portion, so that the engaging portion 452a is moved upward by the elastic force. It can be configured to be energized.

  Returning to FIG. 4, a concave groove 453 that is cut out in a rectangular shape in the front-rear direction is formed on the upper end side of the pressed portion 452. A bearing 60 that is a rotating body is disposed in the concave groove 453. The bearing 60 is pivotally supported by a shaft 454a provided so as to be suspended between the inner side surfaces of the concave portion of the concave groove 453, and the outer ring 62 is configured to be rotatable. The shaft 454a is provided in the left-right direction.

  Here, the configuration of the bearing 60 will be described with reference to FIG. The bearing 60 includes an annular casing formed by coaxial inner rings 61 and outer rings 62, an annular retainer 63 disposed between the inner rings 61 and the outer rings 62, and a spherical body 64. On the inner side in the radial direction of the inner ring 61, a hole 611 is formed through which the shaft 454a is passed and fixed. Further, a groove portion 612 that is opened radially outward is formed on the outer peripheral side of the inner ring 61. The groove portion 612 is formed over the outer periphery of the inner ring 61. Further, a groove portion 622 that opens radially inward is formed on the inner peripheral side of the outer ring 62. The groove portion 622 is formed over the inner periphery of the outer ring 62.

  The retainer 63 is formed in an annular shape coaxial with the inner ring 61 and the outer ring 62, and has an opening 631 that is intermittently disposed from the radially inner side to the outer side. The opening 631 can rotatably support the spherical body 64. One end side of the spherical body 64 is rotatably accommodated in the groove portion 612, and the other end side is rotatably accommodated in the groove portion 622. Accordingly, the outer peripheral surface 621 of the outer ring 62 is formed to be rotatable so as to roll via the spherical body 64.

  In FIG. 4, the bearing 60 is exposed in the front-rear direction and the upward direction in the concave groove 453, and can contact the cam portion 43. With this configuration, the outer ring 62 of the bearing 60 can be rotated together with the rotation of the cam portion 43, and the wear on the outer peripheral surface of the cam portion 43 and the groove 453 and the load on the motor can be reduced.

  A pressing portion 455 is formed at the lower ends of the first pressing member 45A and the second pressing member 45B. The pressing portions 455 of the first pressing member 45 </ b> A and the second pressing member 45 </ b> B are formed in an acute wedge shape in which a tip ridge 455 a is formed in the same front-rear direction as the concave groove 453. The tip ridge 455a can be formed in a flat surface shape or a slightly convex curve shape in the front view of FIG. Side surfaces 455b connected to the left and right of the tip ridge 455a are formed substantially flat. The tip ridge 455a can press the tube T by abutting in a substantially transverse direction perpendicular to the longitudinal direction of the tube T when the first pressing member 45A and the second pressing member 45B are in an operating state.

  FIG. 4C is a front view of the third pressing member 45C. The third pressing member 45 </ b> C has a pressed portion 452 on the upper end side that is the cam portion 43 side of the main body portion 451. The configuration of the pressed portion 452 of the third pressing member 45C is the same as that of the first pressing member 45A and the second pressing member 45B.

  A pressing portion 456 that is a push piece is formed at the lower end of the third pressing member 45C. The pressing portion 456 is formed in a substantially rectangular plate shape that is long in the same direction as the shaft 454a direction, and the area in the long direction is larger than the horizontal cross-sectional area of the columnar third pressing member 45C. It is set large. Relief portions 457 that avoid interference with the positioning protrusions 25 shown in FIG. 1 are formed at both ends of the pressing portion 456 in the longitudinal direction. The escape portion 457 is formed so as to contract in the short direction of the pressing portion 456 (the front-rear direction in FIG. 4C). In FIG.4 (c), the length from the to-be-pressed part 452 of the 3rd press member 45C to the front end surface of the press part 456 is the press part 455 from the to-be-pressed part 452 of the 1st press member 45A and the 2nd press member 45B. Although it is illustrated as being substantially the same as the length to the tip of the tube, it can be set as appropriate according to the pressing depth against the tube T, such as being formed short or long.

Next, the operation of the cam mechanism 40 will be described. FIG. 6 is a transition diagram showing the operation of the cam mechanism 40. FIG. 7 is a schematic external view showing the operation of the pressing member 45.
FIG. 6 shows a change in radius with respect to the rotation angle [rad] of the first cam portion 43A, the second cam portion 43B, and the third cam portion 43C. When the radii of the cam portions 43A to 43C are increased (lift diameter R2), the corresponding pressing members 45A to 45C are lowered and transition to the operating state. When the radius of each cam part 43A-43C becomes small (base diameter R1), corresponding press member 45A-45C will raise and will change to a standby state.

  When the camshaft rotates, from the rotation angle ω0 to the rotation angle ω1, the second pressing member 45B and the third pressing member 45C are in the raised standby state, and the first pressing member 45A is in the lowered operating state (FIG. 7 ( a)). At this time, the fluid filled in the supply side T1 in the tube T moves to a position P1 where it is blocked by the first pressing member 45A of the tube T.

  From the rotation angle ω1 to the rotation angle ω2, the second pressing member 45B gradually descends and transitions to the operating state, the first pressing member 45A maintains the lowered operating state, and the third pressing member 45C rises to standby. Maintain state.

  From the rotation angle ω2 to the rotation angle ω3, the first pressing member 45A and the second pressing member 45B maintain the lowered operating state, and the third pressing member 45C maintains the rising standby state (see FIG. 7B). . At this time, the fluid in the tube T is confined between the position P1 blocked by the first pressing member 45A and the position P2 blocked by the second pressing member 45B.

  From the rotation angle ω3 to the rotation angle ω4, the first pressing member 45A rapidly rises and transitions to the standby state, the second pressing member 45B maintains the lowered operating state, and the third pressing member 45C rises to the standby state. Maintain state.

  From the rotation angle ω4 to the rotation angle ω5, the second pressing member 45B maintains the lowered operating state, and the first pressing member 45A and the third pressing member 45C maintain the rising standby state (see FIG. 7C). . At this time, the fluid in the tube T can flow out to the discharge side T2 by opening the space in the tube T at the position P1.

  From the rotation angle ω5 to the rotation angle ω6, the third pressing member 45C gradually descends and transitions to the operating state, the first pressing member 45A maintains the raised standby state, and the second pressing member 45B moves downward. Maintain state.

  From the rotation angle ω6 to the rotation angle ω7, the second pressing member 45B and the third pressing member 45C maintain the lowered operating state, and the first pressing member 45A maintains the rising standby state (FIG. 7D). At this time, the inner diameter of the position P3 of the tube T pressed by the pressing member 45C is crushed. Accordingly, the fluid in the tube T moves by being pushed toward the discharge side T2.

  From the rotation angle ω7 to the rotation angle ω8, the third pressing member 45C gradually rises and transitions to the standby state, the first pressing member 45A maintains the raised standby state, and the second pressing member 45B is lowered. Maintain state.

  From the rotation angle ω8 to the rotation angle ω9, the first pressing member 45A and the third pressing member 45C maintain the raised standby state, and the second pressing member 45B maintains the lowered operating state (FIG. 7E).

  From the rotation angle ω9 to the rotation angle ω10, the first pressing member 45A gradually descends and transitions to the operating state, the second pressing member 45B maintains the lowered operating state, and the third pressing member 45C rises to standby. Maintain state.

  From the rotation angle ω10 to the rotation angle ω11, the first pressing member 45A and the second pressing member 45B maintain the lowered operating state, and the third pressing member 45C maintains the rising standby state (FIG. 7 (f)). Thus, the fluid in the tube T can be prevented from flowing back once the fluid that has been transported to the discharge side T2 is blocked by the inner diameter of the position P2.

  In the rotation angle ω11 to the rotation angle ω12 (rotation angle ω0 that the first cam portion 43A makes a full turn), the second pressing member 45B rapidly rises and transitions to the standby state, and the first pressing member 45A is lowered. The third pressing member 45C maintains the raised standby state. Thereafter, the operations shown from the rotation angle ω0 to the rotation angle ω12 in FIG. 6 are repeated.

(Embodiment 2)
Next, the tube pump 10A of Embodiment 2 will be described. In the description of the tube pump 10A, the same reference numerals are assigned to the same configurations as those in the first embodiment, and the description thereof is omitted or simplified.

FIG. 8 is a front view of the tube pump 10A, and FIG. 9 is a side view of the tube pump 10A. FIG. 10 is a bottom view of the tube pump 10A.
The base portion 20A is formed by a front plate 21, a rear plate 22, and a top plate 23 in a substantially frame shape that opens downward in a side view of FIG. As shown in FIG. 10, an opening hole 21 a penetrating in the front-rear direction is provided at the approximate center in the left-right direction of the front plate 21. A screw hole 22a penetrating in the front-rear direction is provided at a position substantially corresponding to the opening hole 21a at the center of the rear plate 22 in the left-right direction. The top plate 23 is formed with two elongated holes 23b that are long in the front-rear direction and penetrate vertically.

  A tube restraining mechanism 50 that restricts the back-and-forth movement of the tube T disposed between the base portion 20 and the guide portion 30 is formed in the base portion 20A. The tube holding mechanism 50 includes guide rails 501 and 502 arranged to suspend the inner wall of the front plate 21 and the inner wall of the rear plate 22. The tube holding mechanism 50 includes a rear side regulating member 51 and a front side regulating member 52.

  The entire rear side regulating member 51 is formed in a substantially rectangular parallelepiped block shape. The rear-side regulating member 51 is formed with guide holes 511 penetrating in the front-rear direction on both ends in the longitudinal direction. A substantially rectangular groove 512 is formed on the front side between the guide holes 511 of the rear regulating member 51. The concave groove 512 extends in the vertical direction. Long plate-like first restricting portions 513 are extended upward from both front ends of the rear restricting member 51 (see FIGS. 8 and 9).

  Further, the front side regulating member 52 can also be configured in the same shape as the rear side regulating member 51. The entire front side regulating member 52 is formed in a substantially rectangular parallelepiped block shape. In the front regulating member 52, guide holes 521 penetrating in the front-rear direction are formed on both end sides in the longitudinal direction. A substantially rectangular groove 522 is formed on the rear surface side between the guide holes 521 of the front regulating member 52. The concave groove 522 extends in the vertical direction similarly to the concave groove 512. A screw hole 52a penetrating in the front-rear direction is formed at the approximate center of the left and right sides of the front regulating member 52. A long plate-like second restricting portion 523 is extended upward from both ends on the rear side of the front restricting member 52 (see FIGS. 8 and 9).

  The rear side regulating member 51 and the front side regulating member 52 are formed to be movable back and forth by inserting guide rails 501 and 502 into the respective guide holes 511 and 521.

  On the rear side of the rear regulating member 51, a positioning rear regulating screw 514 is screwed into the screw hole 22 a of the rear plate 22. The rear side regulation screw 514 is fixed at an arbitrary insertion position by screwing a nut 514a screwed into the rear side regulation screw 514 to the rear plate 22 side.

  A male screw-like operation portion 524 inserted through the opening hole 21 a of the front plate 21 is screwed into the screw hole 52 a of the front side regulating member 52. The operation unit 524 is fixed at an arbitrary insertion position with respect to the front side regulation member 52 by screwing the nut 524a screwed into the operation unit 524 to the front side regulation member 52 side.

  A coil spring S2 is wound around the guide rails 501 and 502 between the rear surface of the front plate 21 and the front surface of the front-side regulating member 52, and the front-side regulating member 52 is guided by the guide rail 501 by the coil spring S2. , 502 along the rear regulating member 51 side. On the other hand, the movement of the front regulating member 52 is regulated by the front end 524 b of the operation portion 524 coming into contact with the concave groove 512 of the rear regulating member 51. Further, the rearward movement of the rear side regulation member 51 is regulated by the front end 514 b of the rear side regulation screw 514 coming into contact with the rear surface of the rear side regulation member 51.

  When the user pulls the operation unit 524 forward against the elastic force of the coil spring S2 wound around the guide rails 501 and 502, the front restriction member 52 moves away from the rear restriction member 51. Can be made. Further, when the user releases the operation of pulling out the operation portion 524, the coil spring S2 biases 52 to the rear side, and the front side regulation member 52 is fixed to the rear side regulation member 51 at a predetermined distance. Can do.

  The tube pump 10 </ b> A can be provided with a protrusion 231 </ b> A having a substantially rectangular cross-sectional view instead of the protrusion 231 of the first embodiment. The protrusion 231 can be formed of a metal such as aluminum or stainless steel. The protrusions 231A extend in the front-rear direction and are formed at two locations on both sides of the two long holes 23b. A buffer member 24A having a shape different from that of the buffer member 24 is disposed on the upper surface 231a of each protrusion 231A and the upper surface 23a of the top plate 23 between the long holes 23b. The buffer member 24A of the present embodiment is intermittently disposed at the positions of the upper surfaces 231a and 23a. Further, the upper surface position of the buffer member 24A can be arbitrarily set by changing the height of the protrusion 231A.

  The tube T housed in the housing part 33 in the left-right direction is restricted in the back-and-forth movement by the first restriction part 513 of the rear restriction member 51 and the second restriction part 523 of the front restriction member 52.

  Guide holes 321, 322, and 323 are formed in the bulging portion 32 so as to penetrate vertically. Each guide hole 321, 322, 323 is disposed at a position above the upper surface 23a between the upper surface 231a of the protrusion 231 and the long hole 23b.

  The first pressing member 45 </ b> A, the second pressing member 45 </ b> B, and the third pressing member 45 </ b> C of the present embodiment have a storage chamber 454 that stores a lower part of the bearing 60. Therefore, it is possible to reduce the exposure of the bearing 60 and prevent the bearing 60 and other members from inadvertently contacting each other.

  Further, the tube pump 10A of the present embodiment may be configured to include a coil spring S3 wound around the main body 451 instead of the leaf spring S1 of the first embodiment.

  As described above, according to each embodiment of the present invention, the first pressing member 45 </ b> A and the second pressing member 45 </ b> B are columnar having the pressing portion 455. Therefore, the internal space of the tube T can be reliably cut off, and the tube pumps 10 and 10A that can be stably conveyed with a simple configuration can be configured.

Further, since the pressing portion 455 has a wedge shape in which the tip ridge 455a extends in the transverse direction of the tube T, the space in the tube can be further crushed and blocked.

The pressing members 45 </ b> A and 45 </ b> B have a pressed part 452 that engages with the cam mechanism 40 at the other end of the tube T, and the pressed part 452 has a concave groove 453 that engages with the cam mechanism 40. It is possible to prevent the pressing members 45A and 45B from rotating about the axis and to transport the liquid more stably.

In addition, since the concave groove 453 is provided with a bearing 60 in a recessed portion of the concave groove 453 in more detail than the rotating body that contacts the peripheral end of the cam mechanism 40, the bearing 60 acts to further ensure the rotational movement of the cam mechanism 40. Can be done.

In addition, the guide member 30 has a guide portion 30 for guiding the pressing operation of the pressing members 45A and 45B, and the other end side where the pressed portion 452 of the pressing members 45A and 45B is formed is separated from the guide portion 30 in an elastic direction. Since it has a generating member, the return operation | movement after pressing operation of pressing member 45A, 45B can be performed smoothly.

  Moreover, since the tube pump 10A includes the tube restraining mechanism 50 including the first restricting portion 513 and the second restricting portion 523 that is disposed on the near side of the tube T and can be opened and closed, pressing and releasing of pressure are repeated. When the exhausted tube T needs to be replaced, the tube T can be easily taken out from the tube pump 10. Therefore, since it is assumed that the restoring force of the tube T is reduced by being pressed by the pressing member 45 at the same position, it is possible to change the arrangement direction of the tube T by rotating or to easily replace the tube T. A tube pump 10A having excellent properties can be configured.

  Further, the buffer member 24 is disposed above the base portion 20, and the tube T is sandwiched between the pressing members 45 </ b> A to 45 </ b> C and the buffer member 24. For this reason, the inside of the tube T can be reliably cut off while reducing the wear of the tube T.

  In the first embodiment, the distance between the pressed portion 452 and the bulging portion 32 at the standby position of each pressing member 45A to 45C can be shortened by using the leaf spring S1. Accordingly, the overall size of the tube pump 10 can be reduced.

  Moreover, the tube pumps 10 and 10A can perform the priming at the time of starting easily by making discharge side T2 into a negative pressure, making each press member 45A-45C rest or drive. The negative pressure in the tube T can be generated with a simple configuration by operating a manual pump using a syringe piston connected to one end of the tube T. A vacuum pump may be used instead of the manual pump.

  In addition, you may combine arbitrarily the structure of the tube pump 10 of Embodiment 1, and the structure of 10 A of tube pumps of Embodiment 2. FIG. For example, the positioning protrusion 25 may be configured to be openable and closable in the front-rear direction as a part of the tube holding mechanism 50.

  Further, the pressing order of the pressing members 45 is not limited to the order shown in FIGS. For example, after the pressing member 45 is driven in the order of FIGS. 7A to 7D, the first pressing member 45A to the third pressing member 45C are lowered to press the tube T, and then FIG. You may make a transition to the state of a).

  In the present embodiment, the bearing is disposed in the recessed groove 453, but the bearing may not be disposed. For example, the bottom surface in the concave groove 453 can be a flat surface or a concave curved surface that matches the outer diameter of the cam portion 43.

  Further, in the present embodiment, the configuration in which the tube holding mechanism 50 is disposed in the base portion 20 has been described. However, the configuration in which the tube restraining mechanism 50 is disposed above the base portion 20 to control the movement of the tube T in the front-rear direction. It is good.

  Moreover, although the tube pump 10 of this embodiment showed about the example which uses three press members 45A-45C, you may use four or more press members 45. FIG. The transition between the standby state and the operating state of each pressing member 45 is not limited to the order shown in FIGS. 6 and 7 and the like, and may be configured to operate in other different orders.

DESCRIPTION OF SYMBOLS 10 Tube pump 10A Tube pump 20 Base part 20A Base part 21 Front plate 21a Opening hole 22 Rear plate 22a Screw hole 23 Top plate 23a Upper surface 23b Long hole 24 Buffer member 24A Buffer member 25 Positioning protrusion 30 Guide part 31 Base part 31a Upper surface 32 bulging portion 32a upper surface 33 accommodating portion 40 cam mechanism 41 side plate 42 side plate 43 cam portion 43A first cam portion 43B second cam portion 43C third cam portion 44 shaft portion 45 pressing member 45A first pressing member 45B second pressing member 45C Third pressing member 46 Shaft joint 47 Support plate 48 Camshaft 50 Mechanism 51 Rear side regulating member 52 Front side regulating member 52a Screw hole 60 Bearing 61 Inner ring 62 Outer ring 63 Retainer 64 Spherical body 231 Protruding part 231A Protruding part 231a Upper surface 321 Guide hole 431 Fixing part 432 Screw hole 441 End Portion 451 Main body portion 452 Pressed portion 452a Engagement portion 453 Concave groove 454 Accommodating chamber 454a Shaft 455 Pressing portion 455a Tip ridge 455b Side surface 456 Pressing portion 457 Escape portion 461 Bearing 462 Screw hole 463 Bearing 471 Opening portion 472 Opening hole 501 502 Guide rail 511 Guide hole 512 Groove 513 First regulating portion 514 Rear side regulating screw 514a Nut 514b Tip 521 Guide hole 522 Groove 523 Second regulating portion 524 Operation portion 524a Nut 524b Tip 611 Hole 612 Groove 621 Outer surface 622 Groove 631 Opening P1 Position P2 Position P3 Position R1 Base diameter R2 Lift diameter S1 Leaf spring S11 Lower plate portion S12 Bending portion S13 Upper plate portion S14 Inclined plate portion S2 Coil spring S3 Coil spring T Tube T1 Supply side T2 Discharge side θ 1 Standby angle θ2 Operating angle θ21 Ascending angle θ22 Stopping angle θ23 Descent angle ω0 Rotating angle ω1 to ω12 Rotating angle

Claims (9)

A tube pump that supplies fluid by pressing a flexible tube,
A pressing member that presses the tube by pressing in conjunction with the rotational movement of the cam mechanism;
The tube pump according to claim 1, wherein the pressing member has a columnar shape having a pressing portion that presses the tube at one end on the tube side.   The tube pump according to claim 1, wherein the pressing portion has a wedge shape in which a tip ridge extends in a transverse direction of the tube. The pressing member has a pressed portion that engages with the cam mechanism at the other end of the tube,
The tube pump according to claim 1, wherein the pressed portion has a concave groove that engages with the cam mechanism.   4. The tube pump according to claim 3, wherein the concave groove includes a rotating body in contact with a peripheral end of the cam mechanism in a concave portion of the concave groove. The rotating body is rotatably supported by being supported by a shaft body provided so as to be suspended between the inner side surfaces of the recess of the concave groove,
The tube pump according to claim 4, wherein a peripheral end of the cam mechanism abuts on an outer peripheral surface of the rotating body while engaging with the concave groove. While having a guide portion for guiding the pressing operation of the pressing member,
6. The elastic member according to claim 1, further comprising an elastic member that elastically releases the other end side of the pressing member where the pressed portion is formed and the guide portion. Tube pump as described in. The guide portion has a guide hole for guiding the pressing operation of the pressing member,
The pressed portion of the pressing member has a protruding shape in which an outer diameter is expanded and protruded,
The said elastic member is elastic in the direction which separates the lower surface side of the protrusion shape of the said to-be-pressed part, and the peripheral edge of the said guide hole on the upper surface side of the said guide part. Tube pump as described in.   The tube pump according to claim 6 or 7, wherein the elastic member is a leaf spring. Comprising a base portion on which a cushioning member having elasticity is arranged;
The tube pump according to any one of claims 1 to 8, wherein the tube is disposed between the pressing member and the buffer member.

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