JP2010265890A - Tube pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube pump allowing easy and suitable tube changing without using a tool. <P>SOLUTION: The tube pump is composed of a motor part and a pump part. The motor part comprises a motor case having a rotation shaft projecting from the upper surface. The pump part comprises a pressurizing member inserted with the rotation shaft and rotated by movements of the rotation shaft for squeezing a tube, a pump housing storing the pressurizing member and having a circular inner circumference with the diameter larger than that of the pressurizing member, and an elastic tube arranged between the pressurizing member and the pump housing. The motor case is provided with a fitting hole, the pump housing is provided with a fitting claw projected downward from the bottom surface of the pump housing for engaging with the fitting hole, and the pump part is removable from the motor part, allowing easy and suitable change of the tube without using a tool. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a motor unit and a pump in a tube pump in which a tube is disposed between a pressurizing member and an outer member having a circular inner periphery, and the pressurizing member is rotated to sequentially press the tube to perform a pumping action. It is possible to simplify the mounting and fastening of the parts without tools, and to simplify the tube replacement.

  A tube made of an elastic material is arranged in a ring shape along the circular inner peripheral surface of the outer member, and the tube is sequentially pressed in one direction by a rotating roller provided on the inner side, or provided on the inner side of the tube. There is a tube pump in which a circular pressure member is eccentrically moved along an inner peripheral surface of an outer member and a tube is sequentially compressed in one direction to move a blocking portion and perform a pump action. As a method for attaching and fastening the motor part and pump member of such a pump, there is a method in which a tap is provided on the top surface of the motor part and the pump member is fastened to the motor part using screws. As a method for attaching / detaching the tube, there is a method for engaging the pump member. (Refer to Japanese Patent No. 3637367)

Japanese Patent No. 3637367

  Since the tube pump squeezes the tube to move the compression position and conveys fluid due to its structure, the life of the tube is inevitably shorter than the life of the motor, and the tube needs to be replaced.

In recent years, tube pumps have been reduced in size and installed in small space devices, and there has been a problem that tubes cannot be easily replaced.
In addition, in recent years, small tube pumps have been adopted for applications such as reagent solution transportation and chemical administration, and in consideration of chemical mixing and hygiene, tube replacement is possible for each chemical and individual regardless of tube life. There is an increasing demand for frequent replacement, and there is an increasing demand for easy tube replacement even without special technology.

  In addition, there is a demand for a mobile device such as a drip for use in disasters and the like, and a compact or small tube pump is required.

In order to solve this problem, proposals have been made to replace only the tube, such as the prior art (Japanese Patent No. 3637367). However, when the tube is replaced, the pump drive unit, the pressurizing unit, and the tube are exposed, and the influence on the pump equipment due to the mixing of foreign substances and the like can be considered. In addition, it is not easy to apply a lubricant or the like at the time of replacement, and to replace the tube in a state where a pressure mechanism is present or in a pressurized state. .
Further, in order to prevent the device from being detached at the time of replacement, structurally, members such as pins and washers are required, and there is a problem that the material cost and the pump thickness are increased.

  The present invention pays attention to such problems, and provides a tube pump that makes it possible to easily and appropriately replace the tube without using a screwdriver or other tool as a unit, and at the same time miniaturizing the finished device. The purpose is to realize a small space.

In order to solve the above-described problem, in a tube pump including a motor unit and a pump unit, the motor unit has a motor case having a rotating shaft protruding from the upper surface, and the pump unit is inserted through the rotating shaft and A pressure member that rotates by the axial movement of the rotary shaft to squeeze the tube, a pump housing that includes the pressure member and has a circular inner periphery that is larger in diameter than the pressure member, the pressure member, and the pump housing A fitting hole formed in the motor case and engaging with the fitting hole protruding downward from the bottom surface of the pump housing. The tube pump was provided and the pump part was detachable from the motor part.
The fitting claw is not necessarily limited to the claw shape, and the shape thereof is not limited as long as it is a protrusion that engages or locks in the previous fitting hole.

  In addition, a tube pump having a structure in which a protrusion for preventing loosening or rattling of the joint by pressing the upper surface of the motor case by spring force or elastic force is provided on the bottom surface of the pump housing.

  The tube pump height in which the motor case and the pump housing are overlapped in the axial direction is equal to or less than the width or length of the motor case, and the tube pump has a compact or small structure without increasing the height.

  The operation of the above problem solving means is as follows. That is, in a tube pump composed of a motor unit and a pump unit, the motor unit has a motor case with a rotating shaft protruding from the upper surface, and the pump unit is inserted through the rotating shaft and rotated by axial movement of the rotating shaft. And the pressure member, the pump housing containing the pressure member and having a circular inner circumference larger in diameter than the pressure member, and the pressure member and the pump housing. A tool can be used by providing a fitting hole in the motor case and a fitting claw that engages with the fitting hole protruding downward from the bottom surface of the pump housing. Therefore, it is possible to provide a tube pump in which anyone can easily and appropriately change the tube together with the pump unit that is unitized.

  In addition, by providing a structure on the bottom surface of the pump housing that prevents the loosening or rattling of the joint by pushing the upper surface of the motor case by spring force or elastic force, the gap between the motor case and the pump housing is stretched. Therefore, the tube pump can be provided with a suitable pump mounted.

  The height of the tube pump obtained by superimposing the motor case and the pump housing in the axial direction is equal to or less than the width or length of the motor case, and the height does not increase when joined together. The tube pump can be provided, and a small and small space structure can be realized as a finished device.

  As described above, the present invention exhibits the effect that anyone can easily replace a tube without using a tool, and at the same time, a small and thin tube pump can be realized.

1 shows a first embodiment of the present invention. (1-a) Plan view of motor unit, (1-b) Plan view of pump unit that is unitized, (1-c) Cross-sectional view of pump unit, (1-d) Cross-sectional view of tube pump. 2 shows a second embodiment of the present invention. (2-a) The top view of a motor part, (2-b) The top view of a tube pump, (2-c) Sectional drawing of a tube pump. 3 shows a third embodiment of the present invention. (3-a) The top view of a tube pump, (3-b) Sectional drawing of a tube pump, (3-c) The side view of a motor part. In the first embodiment of the present invention, an embodiment of a spring-like protrusion having a rattling prevention structure is shown. (4-a) The top view of a tube pump, (4-b) Sectional drawing of a tube pump. In the first embodiment of the present invention, an embodiment of the elastic protrusion having the anti-rattle structure will be described. (5-a) The top view of a tube pump, (5-b) Sectional drawing of a tube pump. In the first embodiment of the present invention, an embodiment which realizes compactness or small size will be described. (6-a) The top view of a motor part, (6-b) The top view of a tube pump, (6-c) Sectional drawing of a tube pump.

  An embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows a first embodiment of the present invention. (1-a) is a plan view of a motor unit, (1-b) is a plan view of a pump unit that is unitized, (1-c) is a cross-sectional view of the pump unit, and (1-d) is a motor unit. It is sectional drawing of the tube pump comprised by the pump part. In FIG. 1, 1 is a pump housing in which a cylindrical chamber 2 is formed. An inner peripheral surface 2a of the cylindrical chamber 2 is circular and formed in a range larger than a semicircular and smaller than the entire circumference, and a portion where the inner peripheral surface 2a is not formed serves as an entrance / exit 2b of the tube. Reference numeral 3 denotes a tube arranged in a ring shape along the inner peripheral surface 2a of the cylindrical chamber 2, and both ends thereof are drawn out of the pump housing 1 to constitute an inlet 3a and an outlet 3b.

  A ring-shaped pressurizing member 4 is disposed inside the tube 3, and an eccentric rotor 5 is rotatably disposed inside the pressure member 4. Reference numeral 6 denotes a rotating shaft. The eccentric rotor 5 is locked to the rotating shaft 6, and the outer peripheral portion 5 a of the eccentric rotor 5 rotates while being in sliding contact with the inner peripheral surface 4 a of the pressurizing member 4, so that the pressurizing member 4 is moved along the inner peripheral surface 2 a. The pump unit is configured to rotate. A motor case 7 is disposed on the bottom side of the pump housing 1, has a drive shaft 6, and constitutes a motor unit 10.

  The motor case 7 is provided with a rectangular cutout hole 8, and the pump housing 1 is provided with a protrusion 9 that protrudes downward from the bottom surface of the pump housing. The protrusion 9 is formed in the cutout hole 8 of the motor case 7. The hook portion 9a of the projecting portion 9 is caught in the notch hole 8 of the motor case 7, whereby the motor portion 10 and the pump housing 1 are fastened.

  Next, FIG. 2 shows a second embodiment of the present invention. (2-a) is a plan view of the motor unit, (2-b) is a plan view of the tube pump, and (2-c) is a cross-sectional view of the tube pump. In FIG. 2, 1 is a pump housing in which a cylindrical chamber 2 is formed. An inner peripheral surface 2a of the cylindrical chamber 2 is circular and formed in a range larger than a semicircular and smaller than the entire circumference, and a portion where the inner peripheral surface 2a is not formed serves as an entrance / exit 2b of the tube. Reference numeral 3 denotes a tube arranged in a ring shape along the inner peripheral surface 2a of the cylindrical chamber 2, and both ends thereof are drawn out of the housing 1 to constitute an inlet 3a and an outlet 3b.

  A ring-shaped pressurizing member 4 is disposed inside the tube 3, and an eccentric rotor 5 is rotatably disposed inside the pressure member 4. Reference numeral 6 denotes a rotating shaft. The eccentric rotor 5 is locked to the rotary shaft 6, and the outer peripheral portion 5 a of the eccentric rotor 5 rotates while being in sliding contact with the inner peripheral surface 4 a of the pressurizing member 4, and the pressurizing member 4 is moved along the inner peripheral surface 2 a. The pump unit is configured to rotate. A motor case 7 is disposed on the bottom side of the pump housing 1, has a drive shaft 6, and constitutes a motor unit 10.

The motor case 7 is provided with an arc-shaped cutout hole 8, and the cutout hole 8 is formed by connecting a wide cutout hole 8a and a narrow cutout hole 8b. The pump housing 1 is provided with a protruding portion 9 that protrudes downward from the bottom surface of the pump housing. At the distal end of the protruding portion 9, there is a catching portion (hook) 9a, and the notch hole 8 of the motor case 7 has a wide notch. Inserting into the hole 8a, rotating the pump housing 1 and the motor part 10 in opposite directions, the projecting part 9 moves to the narrow notch hole 8b of the notch hole 8, and the catching part (hook) of the projecting part 9 ) 9a is caught in the narrow notch hole 8b of the notch hole 8 of the motor case 7, so that the motor unit 10 and the pump housing 1 are fastened.

  Further, FIG. 3 shows a third embodiment of the present invention. (3-a) is a plan view of the tube pump, (3-b) is a sectional view of the tube pump, and (3-c) is a side view of the motor unit. In FIG. 3, 1 is a pump housing in which a cylindrical chamber 2 is formed. An inner peripheral surface 2a of the cylindrical chamber 2 is circular and formed in a range larger than a semicircular and smaller than the entire circumference, and a portion where the inner peripheral surface 2a is not formed serves as an entrance / exit 2b of the tube. Reference numeral 3 denotes a tube arranged in a ring shape along the inner peripheral surface 2a of the cylindrical chamber 2, and both ends thereof are drawn out of the housing 1 to constitute an inlet 3a and an outlet 3b.

  A ring-shaped pressurizing member 4 is disposed inside the tube 3, and an eccentric rotor 5 is rotatably disposed inside the pressure member 4. Reference numeral 6 denotes a rotating shaft. The eccentric rotor 5 is locked to the rotary shaft 6, and the outer peripheral portion 5 a of the eccentric rotor 5 rotates while being in sliding contact with the inner peripheral surface 4 a of the pressurizing member 4, and the pressurizing member 4 is moved along the inner peripheral surface 2 a. The pump unit is configured to rotate. A motor case 7 is disposed on the bottom side of the pump housing 1, has a drive shaft 6, and constitutes a motor unit 10.

  A rectangular notch hole 8 is provided on the side surface of the motor case 7, and a protruding portion 9 protruding downward from the bottom surface of the pump housing is provided in the pump housing 1, and the protruding portion 9 has a catching portion (hook). There is 9a. The catch portion (hook) 9 a is inserted into the notch hole 8 of the motor case 7, thereby fastening the motor portion 10 and the pump housing 1.

  FIG. 4 is an embodiment in which a spring-like protrusion is provided in the first embodiment to prevent rattling, and a projecting portion 9 extending downward from the bottom surface of the pump housing 1 is inserted into a notch hole 8 in the motor case 7. The motor unit 10 is fastened, and the pump housing 1 has an arm 11 that is integral with the pump housing 1 and has a spring property, apart from the projecting portion 9, and has the spring property 11. Has a protruding portion 12, and the protruding portion 12 presses the motor case 7, thereby preventing rattling when the pump housing 1 and the motor portion 10 are fastened.

  FIG. 5 is an embodiment in which elastic projections having elasticity are provided in the first embodiment to prevent rattling, and a protruding portion 9 below the bottom surface of the pump housing 1 is inserted into the notch hole 8 in the motor case 7. The pump housing 1 and the motor unit 10 are fastened, and a projecting part made of an elastic body 14 inserted into or pasted into a hole 13 provided in the pump housing 1 separately from the projecting part 9 in the pump housing 1. 14a, and the projecting portion 14a is contracted to hold the motor case 7 so that the backlash when the pump housing 1 and the motor unit 10 are fastened is suppressed.

  FIG. 6 shows an embodiment in which the first embodiment is compact or small. When the width of the motor case 7 is A, the height of the tube pump in which the motor case 7 and the pump housing 1 are overlapped in the axial direction is as follows. Designed to be A or less, a tube pump having a compact or small structure can be provided.

  As described above, the present invention can provide a compact or small tube pump at the same time that the tube can be easily replaced with the pump unit without using a tool.

  The present invention can be applied to various small tube pumps.

DESCRIPTION OF SYMBOLS 1 Pump housing 1a Pump housing base 1b Pump housing cover 2 Cylindrical chamber 2a Inner peripheral surface 2b Input / output part 3 Tube 3a Inlet 3b Outlet 4 Pressurizing member 4a Pressurizing member inner peripheral surface 5 Eccentric rotor 5a Eccentric rotor outer peripheral part 6 Drive shaft 7 Motor case 8 Notch hole 8a Notch hole (wide)
8b Notch hole (narrow width)
9 Projecting part downward from the bottom of the pump housing 9a Engagement part (hook) of the projecting part from the bottom of the pump housing
DESCRIPTION OF SYMBOLS 10 Motor part 11 Spring arm 12 Projection part 13 Hole of pump housing 1 14 Elastic body 14a Projection part which consists of elastic body

Claims (3)

In a tube pump comprising a motor part and a pump part, the motor part has a motor case with the rotating shaft protruding from the upper surface, and the pump part is inserted through the rotating shaft and rotated by the axial movement of the rotating shaft. A pressure member for squeezing the tube, a pump housing containing the pressure member and having a circular inner circumference larger in diameter than the pressure member, and an elasticity disposed between the pressure member and the pump housing A fitting hole in the motor case, a fitting claw for engaging with the fitting hole protruding downward from the bottom surface of the pump housing, and a pump portion from the motor portion. A tube pump characterized by being detachably joined. 2. The tube pump according to claim 1, wherein a protrusion is provided on the bottom surface of the pump housing to prevent loosening or rattling of the joint by pressing the upper surface of the motor case with spring force or elastic force. The tube pump according to claim 1, wherein a height of the tube pump obtained by superimposing the motor case and the pump housing in an axial direction is equal to or less than a width or a length of the motor case.

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