JP2019100267A - Tube pump - Google Patents

Abstract

To provide a tube pump capable of discharging even a minute amount of liquid with high accuracy.SOLUTION: A tube pump 1 comprises a pump body 5, a receiving member 6, a flexible tube 90, and a toggle clamp device 80. The pump body 5 comprises a plurality of pressing members 211 advancing/retreating with respect to the flexible tube 90. The toggle clamp device 80 comprises a toggle link 81 rotatably attached to the pump body 5, and a toggle arm 82 rotatably attached to the toggle link 81 and the receiving member 6. The pump body 5 and the receiving member 6 are provided with: a guide pin 65 for guiding the receiving member 6 in an advance/retreat direction of the pressing member 211 from a position where the receiving member 6 is attached to the pump body 5 to a position separated by a predetermined distance; and a guide hole 56.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a tube pump which discharges a liquid by opening and closing a space in the tube, and more particularly to a tube pump which discharges a fixed amount of a small amount of liquid.

  As a tube pump, a flexible tube is disposed between three pressure members for inlet, outlet, and metering and a receiving member, and the pressing member is moved to the receiving member side to press the flexible tube. There is known a tube pump that sequentially sucks, measures, and discharges a small amount of liquid by performing the operation (for example, Patent Document 1).

  In such a tube pump, it is required that the flexible tube can be easily replaced, and in the patent document 1, the receiving member is operated by a slide including a slide in a direction perpendicular to the advancing direction of the pressing member. It was made to attach to the pump body so that attachment or detachment was possible.

JP, 2002-327685, A

  In the patent document 1, the receiving member slides in the direction perpendicular to the advancing direction of the pressing member, and therefore, there is a possibility that the tube contacts the tube at the time of sliding, the arrangement position of the tube shifts, or the tube twists. In particular, when the amount of the liquid to be discharged is small, slight displacement of the tube and twist may affect the measurement of the liquid, and the discharge amount may vary to reduce the discharge accuracy.

  An object of the present invention is to provide a tube pump capable of discharging a small amount of liquid with high accuracy.

  The tube pump according to the present invention comprises a pump body, a receiving member, a flexible tube disposed between the pump body and the receiving member, and a toggle clamp device for detachably attaching the receiving member to the pump body. And the pump body includes a plurality of pressing members driven to move toward and away from the flexible tube, and the toggle clamp device includes a toggle link pivotally attached to the pump body. The pump body and the receiving member are separated from the position where the receiving member is attached to the pump body by a predetermined distance from the position where the receiving member is attached to the pump body and the receiving member. A guide mechanism is provided for guiding the receiving member in the advancing and retracting direction of the pressing member.

According to the present invention, the receiving member is guided by the guide mechanism in the advancing and retracting direction of the pressing member when attached to the pump body. For this reason, the flexible tube is pressed straight toward the pump body by the receiving member, and it is possible to prevent the flexible tube from being displaced or twisted in the direction perpendicular to the advancing direction of the pressing member. For this reason, it is possible to prevent the variation of the discharge amount due to the positional displacement of the flexible tube and the like, and it is possible to discharge even a small amount of liquid with high accuracy.
In addition, since the receiving member is attached to the pump main body by the toggle clamp device, it is possible to prevent a trouble due to a change in the position of the receiving member due to loosening of a screw as in the case of screwing the receiving member. Furthermore, by using the toggle clamp device, compared with screwing, the receiving member can be easily opened and closed, and the flexible tube can be easily attached and detached.

In the tube pump of the present invention, the guide mechanism is characterized by comprising a guide pin provided on the pump main body and a guide hole provided on the receiving member and into which the guide pin is inserted.
According to the present invention, the guide mechanism can be realized with a simple structure, and the cost can also be reduced.

In the tube pump of the present invention, the pressing member includes a first pressing member for an inlet valve, a second pressing member for an outlet valve, and a liquid discharge disposed between the first pressing member and the second pressing member. A third pressing member, and the receiving member is a tube receiving member disposed so as to sandwich the flexible tube with respect to the first pressing member and the second pressing member, and the third pressing member A discharge amount setting member which is disposed sandwiching the flexible tube against it and which is provided so as to be able to move forward and backward with respect to the flexible tube and adjust the position to receive the flexible tube to set the discharge amount And preferably.
According to the present invention, the entrance side of the flexible tube is opened and closed by driving the first pressing member toward and away from the tube receiving member, and the second pressing member is driven to advance and retract toward the tube receiving member. The flexible tube can be reliably opened and closed because the outlet side of the flexible tube is opened and closed.
Further, in a state where the flexible tube is in contact with the discharge amount setting member, the discharge amount of the liquid is adjusted by the movement amount after the pressing member for liquid discharge starts pressing the flexible tube. Therefore, the discharge amount can be easily adjusted by adjusting the position of the discharge amount setting member with a micrometer or the like.

In the tube pump of the present invention, preferably, the second pressing member is provided with a restricting member for restricting the amount of movement in the direction away from the flexible tube.
According to the present invention, the movement amount of the second pressing member functioning as the outlet valve can be regulated by the regulating member, so that the opening degree of the flexible tube opened and closed by the second pressing member can be set to the minimum, Suction back can be reduced, and discharge accuracy can be further improved.

It is a front view showing a tube pump of an embodiment of the present invention. It is a top view which shows the tube pump of the said embodiment. It is a longitudinal cross-sectional view which shows the principal part of the tube pump of the said embodiment. It is a cross-sectional view which shows the principal part of the tube pump of the said embodiment. It is a figure which shows operation | movement of the toggle clamp apparatus of the tube pump of the said embodiment. It is a figure which shows the unlocking state and locked state of the toggle clamp apparatus of the tube pump of the said embodiment.

Hereinafter, an embodiment of the present invention will be described based on FIGS.
FIG. 1 is a front view showing a tube pump 1 of the present embodiment, and FIG. 2 is a top view of the tube pump 1. The tube pump 1 includes a pump unit 2 and a motor 3 as shown in FIG. 1 and is used as a dispenser for discharging various liquids such as chemical solutions every fixed amount, and in particular, a small amount of liquid of 1 cc or less Used for the discharge of
In the following description, for convenience, the upper side of FIG. 1 will be described as upper, the lower side as lower, the left side as front, and the right side as rear. However, the direction at the time of use of the tube pump 1 is not limited to that of FIG. 1, and may be used horizontally or upside down.
3 is a longitudinal sectional view showing the internal structure of the pump unit 2, and FIG. 4 is a transverse sectional view showing the internal structure of the pump unit 2. As shown in FIG.

The pump portion 2 and the motor 3 are connected by a motor flange 4. As the motor 3, a control motor such as a stepping motor or a servomotor is used.
The pump part 2 is provided with the pump main body 5 and the receiving member 6, as shown to FIG.
The pump body 5 includes a first body 60 and a second body 70, and the drive shaft 10 is disposed in the internal space of the bodies 60, 70.

The drive shaft 10 is connected to an output shaft 3 A of the motor 3 via a coupling 11 disposed in the motor flange 4. The drive shaft 10 is formed of a hexagonal shaft and is rotatably mounted by bearings 12 and 13. The bearing 13 on the upper surface side is held by a bearing retainer 14.
Three cams 15 to 17 are sequentially attached to the drive shaft 10 with the spacer 18 interposed therebetween. The cam 15 is an inlet valve pressing cam 15 that drives a first pressing member 211 for an inlet valve, and the cam 16 is a metering cam 16 that drives a third pressing member 221 for discharging liquid that measures and discharges liquid. The cam 17 is an outlet valve pressing cam 17 that drives a second pressing member 231 for the outlet valve. That is, in the present embodiment, a plurality (three) of pressing members 211, 221, 231 are provided.

In the pump body 5, pins 21 to 23 which are orthogonal to the axial direction of the drive shaft 10 and which are advanced and retracted by the cams 15 to 17 are disposed.
The pin 21 is an inlet valve pin 21 for driving the first pressing member 211, the pin 22 is a metering pin 22 for driving the third pressing member 221, and the pin 23 is an outlet valve pin for driving the second pressing member 231. 23

As shown in FIG. 4, a pair of inlet valve pins 21 is provided on the left and right sides of the drive shaft 10. A roller receiving member 25 is attached to the pair of inlet valve pins 21.
Similarly, a pair of metering pins 22 and an outlet valve pin 23 are also provided on the left and right sides of the drive shaft 10, and a roller receiving member 25 is attached thereto.
Each roller receiving member 25 is fixed to each pin 21 to 23 by a stop ring or the like, and moves in the axial direction integrally with each pin 21 to 23.
A roller 26 is rotatably attached to each roller receiving member 25. Further, a coil spring 27 is interposed between the first body 60 and the roller receiving member 25. The roller receiving member 25 and the pins 21 to 23 are biased toward the drive shaft 10, that is, rearward by the coil spring 27. For this reason, the roller 26 of the roller receiving member 25 biased toward the drive shaft 10 is provided so as to be able to abut on the cams 15-17.

  The second body 70 is formed with an insertion hole 71 into which the rear end portions of the pins 21 to 23 are inserted. A female screw is formed at the rear end opening of the insertion hole 71. A set screw (stopper) 72 serving as a regulating member is screwed into the insertion hole 71 into which the inlet valve pin 21 and the outlet valve pin 23 are inserted, and is fixed by a nut 73. The set screw 72 is screwed with the female screw of the insertion hole 71 and the female screw of the nut 73, so that the amount of screwing can be adjusted and immovably mounted by the effect of a so-called double nut.

The set screw 72 sets the rearward movement stroke end of each pin 21, 23. That is, the position of the tip end face of the set screw 72 is in front of the position of the rear end face of each pin 21, 23 when each pin 21, 23 is moved backward most by the cam 15, 17 and coil spring 27. Set to In this case, the rearward movement of each pin 21, 23 is restricted at a position where the rear end face of each pin 21, 23 abuts on the set screw 72. In this case, depending on the position of the set screw 72, it may be separated from the cam 17 as the roller 26 of the roller receiving member 25 attached to the pin 23 of FIG. Thus, as described later, the strokes (movement amounts) of the first pressing member 211 and the second pressing member 231 which move integrally with the inlet valve pin 21 and the outlet valve pin 23 can be adjusted.
A screw 74 is also screwed into the insertion hole 71 into which the measuring pin 22 is inserted. The screw 74 is used together with the nut 75 for fixing the plate-like stopper 76 to the second body 70.

The pins 21 to 23 are inserted into the through holes of the first body 60, and the tips of the pins 21 to 23 project into the space between the first body 60 and the receiving member 6.
A through hole orthogonal to the longitudinal direction of the inlet valve pin 21 is formed at the tip of the pair of inlet valve pins 21. A round rod-shaped first pressing member 211 is inserted into and fixed to the through hole. Therefore, the first pressing member 211 is stretched and attached between the tip end portions of the pair of inlet valve pins 21.
Similarly, through holes are also formed at the tip end portions of the pair of outlet valve pins 23, and both end portions of the second rod-like pressing member 231 are inserted and fixed. Therefore, the second pressing member 231 is stretched and attached between the tip ends of the pair of outlet valve pins 23.
A third pressing member 221 is attached between the distal end portions of the pair of measuring pins 22. The third pressing member 221 is formed in the shape of a rectangular block, and the left and right end portions thereof are formed with through holes into which the tip end portions of the measuring pins 22 can be inserted. The measuring pin 22 and the third pressing member 221 are fixed by a spring pin or the like inserted into the through hole formed in the measuring pin 22 and the groove of the third pressing member 221.

Spacers 62 and 63 are attached to the front of the first body 60, that is, the four corners of the surface facing the receiving member 6.
The spacers 62 have guide pins 65 attached thereto, and are attached to the front surface of the first body 60 at two places far from the toggle link 81 described later, as shown in FIG.
The spacer 63 has no guide pin attached, and is attached to the front surface of the first body 60 at two places near the toggle link 81.

  On the upper and lower surfaces of the first body 60, a pair of tube holders 67 having a holding groove for holding a flexible tube 90 (hereinafter simply referred to as a tube) is attached.

The receiving member 6 is detachably provided to the first body 60 by a toggle clamp device 80 described later.
As shown in FIGS. 3 and 4, the receiving member 6 has a base portion 51, four contact portions 52 projecting from the four corners of the base portion 51 toward the first body 60, and the left and right contact portions 52. It has a flange 53 provided, a bearing 54 rotatably supporting a toggle arm described later, and an attachment 55. A micrometer 35 is attached to the attachment portion 55 using a fixing screw 355.
The four abutment portions 52 abut the spacers 62, 63. A guide hole 56 into which the guide pin 65 is inserted is formed in at least the contact portion 52 that contacts the spacer 62. In addition, in order to eliminate the restriction | limiting of the attachment direction of the receiving member 6, you may form a guide hole also in the contact part 52 contact | abutted to the spacer 63. As shown in FIG.
When the receiving member 6 is attached to and detached from the pump main body 5 by the toggle clamp device 80, the receiving member 6 is guided in the advancing and retreating direction of the second pressing member 231 in a state where the guide pin 65 is inserted into the guide hole 56. Ru. Therefore, the guide pin 65 and the guide hole 56 constitute the guide mechanism of the present invention.

The tube receiving member 30 is attached between the two opposing flanges 53. The tube receiving member 30 is formed in a substantially cylindrical shape, and is fixed to the base 51 via the spacer 305.
The tube receiving member 30 is formed with a through hole penetrating in the axial direction, and in this through hole, the weighing receiver 31 and the measuring stand 32 are disposed movably in the axial direction. The spindle 351 of the micrometer 35 is fixed to the measuring stand 32, and by operating the micrometer 35, the axial positions of the measuring stand 32 and the measuring stand 31 can be adjusted. Thereby, when the third pressing member 221 protrudes most to the receiving member 6 side, the distance between the tube pressing surface of the third pressing member 221 and the tube contact surface of the weighing receiver 31 is adjusted, and the pressing of the tube 90 is performed. The amount, that is, the discharge amount of the liquid can be set. Therefore, the discharge amount setting member of the present invention is constituted by the measurement support 31 and the measurement support 32 provided so as to be movable back and forth with respect to the tube 90 by the micrometer 35.

  Two thin disc-like valve receptacles 34 are stuck on the tube receptacle member 30. The valve receiver 34 is a urethane washer made of urethane rubber, and provided so as to be appropriately elastically deformed and reliably close the tube 90 when the tube 90 is pressed by the first pressing member 211 and the second pressing member 231. ing.

The toggle clamp device 80 for attaching and detaching the receiving member 6 includes a toggle link 81, a toggle arm 82, and a toggle link shaft 83.
The toggle link 81 is integrally configured by including a pair of link plate portions 811 and a connection plate portion 815 connecting the pair of link plate portions 811. As shown in FIG. 1, the connection plate portion 815 is formed with a hole 816 with which a link retainer 86 described later can be engaged.

The toggle arm 82 includes a pair of arm portions 821 and an operation portion 825 connecting the pair of arm portions 821 and is configured in a substantially U shape.
The toggle link shaft 83 is fixed to the rear surface of the second body 70.

The rear ends of the pair of link plate portions 811 of the toggle link 81 are disposed opposite to the upper and lower ends of the toggle link shaft 83, and are rotatably attached to the toggle link shaft 83 by a cap screw 831. ing.
The pair of arm portions 821 of the toggle arm 82 is rotatably attached to a front end of the link plate portion 811 by a cap screw 832. The pair of arm portions 821 is rotatably attached to the bearing portion 54 of the receiving member 6 by a pin 833. Here, the position of the pin 833 is closer to the tip end of the arm portion 821 than the cap screw 832.

Here, the toggle link shaft 83 is attached to the center position of the second body 70 in the left-right direction, and the pivot shaft of the toggle link 81 by the cap screw 831 is also located at the center position in the left-right direction of the second body 70.
Further, the bearing portion 54 of the receiving member 6 is attached to the center position of the receiving member 6 in the left-right direction, and the rotation axis by the pin 833 of the toggle arm 82 is also located at the center position in the left-right direction of the receiving member 6.
Then, as shown in FIG. 2, in a state where the receiving member 6 is attached to the first body 60 by the toggle clamp device 80, a pivot shaft of the toggle link 81 with respect to the toggle link shaft 83 (a pivot shaft by the cap screw 831) The tube 90 held by the tube holder 67 is disposed on a line connecting the pivot shaft of the toggle arm 82 with respect to the receiving member 6 (the pivot shaft of the pin 833).
Furthermore, in the state shown in FIG. 2, the pivot shaft of the toggle link 81 and the toggle arm 82 (the pivot shaft by the cap screw 832) is closer to the spacer 62 than the line connecting the pivot shafts and the tube 90. It is provided at a position away from the toggle link 81.

  As shown in FIG. 5A, when the toggle link 81 is opened, the stopper 76 abuts on the connection plate portion 815 to regulate the opening angle of the toggle link 81. As a result, the toggle link 81 can be prevented from opening more than necessary, and the operability of opening and closing the toggle link 81 can be improved.

The tube pump 1 is provided with a lock mechanism 85 that limits the opening and closing of the receiving member 6 by the toggle clamp device 80.
The lock mechanism 85 is composed of a link presser 86 rotatably attached to the side surface of the first body 60 and a hole 816 of the connecting plate 815. The dimension of the short side of the link retainer 86 is equal to or less than the width of the hole 816, and the dimension of the long side is equal to or greater than the width of the hole 816. For this reason, as shown in FIG. 6A, the link retainer 86 can be set in a direction in which the hole 816 can be inserted and in a direction in which the hole 816 can not be inserted, as shown in FIG. Therefore, as shown in FIG. 4, the receiving member 6 is attached to the first body 60 by the toggle clamp device 80, and the connecting plate 815 of the toggle link 81 is disposed along the side surfaces of the first body 60 and the second body 70. In this state, by rotating the link presser 86 by 90 degrees, the connecting plate 815 can not move and the toggle clamp device 80 is locked.

Next, the operation of attaching and detaching the tube 90 will be described.
First, as shown in FIG. 5A, the receiving member 6 is removed from the pump main body 5 by the toggle clamp device 80. As a result, the front side of the pump body 5 (first body 60) is exposed to the outside, so the tubes 90 are disposed in the holding grooves of the upper and lower tube holders 67 from the front side of the first body 60.

Next, the toggle arm 82 is operated to position the receiving member 6 in front of the first body 60 as shown in FIG. 5 (B).
At this time, by rotating the toggle arm 82 in a direction approaching the toggle link 81 (counterclockwise direction in FIG. 5), the distance between the receiving member 6 and the pump main body 5 can be increased, and the spacer 63 is not hit. As shown in FIG. 5 (B), the receiving member 6 can be disposed in front of the pump body 5.

When the toggle arm 82 is rotated in the direction away from the toggle link 81 (clockwise direction in FIG. 5) from the state of FIG. 5B, the receiving member 6 moves to the first body 60 side. Then, while inserting the guide pin 65 of the spacer 62 into the guide hole 56 of the receiving member 6, the toggle arm 82 is further moved in the direction away from the toggle link 81, and as shown in FIG. When the cap screw 832 moves to a position closer to the spacer 62 than the line connecting the pins 833, it is in a clamped state, and the receiving member 6 can be maintained in contact with the spacers 62, 63. Thereafter, the micrometer 35 is operated to adjust the position of the measurement receiver 31 with respect to the third pressing member 221. In addition, since the toggle clamp device 80 is stabilized in the clamp state, normally, it is not necessary to lock by the lock mechanism 85, but if locked by the lock mechanism 85, the clamp state can be reliably maintained.
The valve receiver 34 of the tube receiving member 30 is opposed to the first pressing member 211 and the second pressing member 231. The first pressing member 211 and the second pressing member 231 have only to be able to reliably open and close the tube 90, and even if the positional accuracy between the first pressing member 211 and the second pressing member 231 and the valve receiver 34 varies somewhat, It can absorb by deforming 34 and closing tube 90 certainly.

  When the tube 90 is removed from the tube pump 1 in order to clean or replace the tube 90, an operation reverse to the above-described operation at the time of attachment may be performed.

  Next, a liquid discharge operation using the tube pump 1 will be described. The liquid discharge operation of the tube pump 1 is basically the same as that of the tube pump using the three pressing members described in Patent Document 1, JP-A 2009-197654, etc. Explain to. The tube pump 1 is provided with a sensor for detecting one rotation of the motor 3, and the discharge operation at each time is controlled by the signal of this sensor.

The stop position of the tube pump 1 is located near the position (retracted position) where the third pressing member 221 is farthest from the tube 90, and the second pressing member 231 is a position at which the tube 90 is closed. 90 is almost closed position. Accordingly, the tube 90 is closed at two points of the first pressing member 211 and the second pressing member 231, and the step of sucking the liquid between them is completed.
When the motor 3 starts to rotate by the operation signal, the second pressing member 231 for the outlet valve starts to open the tube 90, and the third pressing member 221 for discharging the liquid starts to move to the tube 90 side. When the motor 3 rotates 90 degrees, the second pressing member 231 is farthest from the tube 90, and the outlet valve also has the maximum opening. The maximum opening degree of the second pressing member 231 is adjusted at the position where the outlet valve pin 23 abuts on the set screw 72 as described above. In addition, the third pressing member 221 is an intermediate point approaching the tube 90, and substantially reaches the maximum speed.

When the motor 3 further rotates by 90 degrees (180 degrees from the start of rotation), the third pressing member 221 is at the stroke end in the direction of pressing the tube 90, and the operation is substantially stopped. That is, the discharge of the liquid is completed. Therefore, the liquid is discharged in accordance with the volume of the tube 90 pressed by the third pressing member 221. In addition, the second pressing member 231 for the outlet valve completely closes the tube 90 at the timing when the third pressing member 221 finishes pressing the tube 90, and the first pressing member 211 for the inlet valve starts to open the tube 90 .
When the motor 3 further rotates by 90 degrees (270 degrees from the start of rotation), the first pressing member 211 reaches the maximum opening degree at which the inlet valve pin 21 abuts against the set screw 72, and the third pressing member 221 moves away from the tube 90 The speed is almost maximum at the midpoint.
When the motor 3 further rotates by 90 degrees (360 degrees from the start of rotation), it returns to the stop position.

Here, by operating the micrometer 35, the measurement receiver 31, which is a discharge amount setting member, can adjust the distance from the third pressing member 221. Then, when the weighing receptacle 31 is set so as to be closest to the first pressing member 211 in the settable range, the deformation amount of the tube 90 is also the largest, so the discharge amount can also be set to the maximum. On the other hand, when the weighing receptacle 31 is set to be farthest from the third pressing member 221, the deformation amount of the tube 90 is also minimized, and the discharge amount can also be set to a minimum.
Even in the case of the maximum discharge amount, the dimension of each portion is set such that the distance (gap) between the weighing receptacle 31 and the third pressing member 221 is equal to or more than twice the thickness of the tube 90.

According to this embodiment, the following effects can be obtained.
When attaching the receiving member 6 to which the weighing receiver 31 and the valve receiver 34 are attached to the pump main body 5 and setting the tube 90, the receiving member 6 is made to face the pump main body 5 and straight with respect to the pump main body 5 That is, since the guide pin 65 for guiding the receiving member 6 in the axial direction of the measuring pin 22 is provided, the tube 90 can be prevented from shifting or twisting at the time of setting the tube 90, and the tube 90 can be positioned properly. It can be set to
Further, since the first pressing member 211, the third pressing member 221, and the second pressing member 231 move toward the valve receiver 34 and the measurement receiver 31 to configure the pump by pressing the tube 90, the tube 90 is pressed. It is possible to suppress the fluctuation of the discharge amount due to the change of the position, and to discharge a small amount of liquid accurately.

  Since the first pressing member 211, the third pressing member 221, and the second pressing member 231 are moved by the cams 15 to 17 to press the tube 90, the first pressing member 211, the third pressing member 221, and the second pressing member 231 It is possible to reduce the variation of the extrusion position of the above, to suppress the variation of the discharge amount, and to discharge a small amount of liquid more accurately.

  Since the set screw 72 for regulating the stroke of the inlet valve pin 21 and the outlet valve pin 23 is provided, the stroke of the second pressing member 231 can be set smaller than in the case where the cam 17 alone controls. For this reason, the maximum opening degree of the tube 90 by the second pressing member 231 can be set to the necessary minimum reduction, and the suction back of the discharge liquid is reduced, so that the accuracy is improved.

Since the receiving member 6 is fixed to the pump main body 5 by the toggle clamp device 80, the displacement of the tube 90 can be eliminated. For this reason, as in the case where the valve receiver 34 is screwed, it is possible to prevent a problem due to the fluctuation of the position of the valve receiver 34 due to the loosening of the screw.
Furthermore, by using the toggle clamp device 80, compared with screwing, the opening / closing operation of the receiving member 6 is facilitated, and the tube 90 can be easily attached and detached.

The present invention is not limited to the above embodiment, and various improvements and design changes can be made without departing from the scope of the present invention.
In the embodiment, although the first pressing member 211, the third pressing member 221, and the second pressing member 231 are driven using the cams 15 to 17, they may be driven using an air cylinder, a piezoelectric element, or the like. .
Further, since the toggle clamp device 80 can maintain the state by moving the toggle arm 82 to be in the clamp state, the lock mechanism of the toggle clamp device 80, that is, the link presser 86 of the link clamp 80 and the hole 816 of the connection plate portion 815 It is not necessary to provide it.

The guide mechanism for moving the receiving member 6 in the longitudinal direction of the measuring pin 22 with respect to the pump main body 5 is not limited to the guide pin 65 and the guide hole 56. For example, a concave groove may be formed in one of the receiving member 6 and the first body 60, and a convex stripe portion guided by the concave groove may be formed in the other for guiding.
The structure of the toggle clamp device 80 is not limited to the above embodiment. That is, the tube pump 1 according to the present invention can open and close parts serving as the receiving member by the toggle clamp mechanism, and when the receiving member is attached to or removed from the pump main body, the third pressing member 221 It may be any one that can move in the direction of advancement and withdrawal.

Although the best configuration, method and the like for practicing the present invention are disclosed in the above description, the present invention is not limited thereto. That is, although the present invention has been particularly illustrated and described primarily with respect to particular embodiments, it should be understood that the present invention may be configured relative to the above-described embodiments without departing from the spirit and scope of the present invention. Those skilled in the art can make various modifications in materials, quantities, and other detailed configurations.
Therefore, the description with the above-described disclosure of the shape, the material, etc. is exemplarily described for facilitating the understanding of the present invention, and is not intended to limit the present invention. The description in the name of the member from which the limitation of some or all of the limitations such as is removed is included in the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Tube pump, 2 ... Pump part, 3 ... Motor, 5 ... Pump main body, 6 ... Receiving member, 10 ... Drive shaft, 15 ... Inlet valve pushing cam, 16 ... Weighing cam, 17 ... Outlet valve pushing cam, 21 ... Inlet valve pin, 22: measuring pin, 23: outlet valve pin, 25: roller receiving member, 26: roller, 27: coil spring, 30: tube receiving member, 31: measuring receiving, 32: measuring receiving base, 34: valve receiving, 35 ... Micrometer, 52 ... Abutment part, 56 ... Guide hole, 60 ... 1st body, 62, 63 ... Spacer, 65 ... Guide pin, 67 ... Tube holder, 70 ... 2nd body, 72 ... Set screw, 76 ... Stopper, 80: toggle clamp device, 81: toggle link, 82: toggle arm, 83: toggle link shaft, 85: locking mechanism, 86: link press, 90: tube 211: first pressing member, 221: third pressing member, 231: second pressing member, 811: link plate portion, 815: connecting plate portion, 816: hole, 821: arm portion, 825: operation portion, 831: cap Screw, 832 ... cap screw, 833 ... pin.

Claims (4)

A pump body, a receiving member, a flexible tube disposed between the pump body and the receiving member, and a toggle clamp device detachably attaching the receiving member to the pump body;
The pump body includes a plurality of pressing members which are driven to move toward and away from the flexible tube.
The toggle clamp device is
The toggle link pivotally attached to the pump body, and the toggle arm pivotally attached to the toggle link and the receiving member;
The pump body and the receiving member are provided with a guide mechanism for guiding the receiving member in the advancing and retreating direction of the pressing member to a position separated by a predetermined distance from the position where the receiving member is attached to the pump body. Characteristic tube pump. In the tube pump according to claim 1,
A tube pump comprising: a guide pin provided on the pump body; and a guide hole provided on the receiving member and into which the guide pin is inserted. The tube pump according to claim 1 or 2,
The pressing member is a first pressing member for an inlet valve, a second pressing member for an outlet valve, and a third pressing member for liquid discharge disposed between the first pressing member and the second pressing member. Equipped with
The receiving member is
A tube receiving member disposed so as to sandwich the flexible tube with respect to the first pressing member and the second pressing member;
The flexible tube is disposed with respect to the third pressing member so as to sandwich the flexible tube, and can be advanced and retracted with respect to the flexible tube, and the discharge amount can be set by adjusting the position where the flexible tube is received. And a discharge amount setting member. In the tube pump according to claim 3,
A tube pump comprising a restricting member for restricting an amount of movement of the second pressing member in a direction away from the flexible tube.

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