JPH04119376U - peristaltic pump - Google Patents

Abstract

(57) [Summary] [Structure] The tube holder is configured to be held in the air so that the leaf spring is elastically pressed against the roller. [Effect] The tube holder always compresses the tube at the optimum position with a constant force, so the life of the tube is significantly improved. In addition, since there is no sliding surface when the position of the tube holder changes with the rotation of the roller, the life of the pump is significantly improved.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on a peristaltic device used for fluid transport in fields such as medicine, pharmacy, and chemistry. Regarding the Lucic pump. In addition, peristaltic pumps are tube pumps, It is also sometimes called a roller pump or a squeeze pump.

0002

[Conventional technology]

Conventionally, as shown in Fig. 2, the method of holding the tube holder is as shown in Fig. 2a. against the roller 2b. While holding the sliding surface so that it moves in parallel, the bullet Sexually pressed against the roller, Figure 2c. Elastically turns into a roller using one point as a fulcrum He was pushing me.

0003 The shape of the tube holder is either straight or arc shaped along the rotation of the roller. There was. (In Figure 2, only the arc-shaped one is shown.) Here, the rollers are arranged with some error from the circumference. Also, The diameter of the roller also has some error. In addition, the tube holder is shaped like an arc. , there is also an error in the arc that crushes the tube. Also, with respect to the rotation axis of the roller There is also an error in the position of . Therefore, when the tube holder is fixed, the roller The shortest distance between the outer edge of the tube holder and the arc-shaped inner edge of the tube holder is not constant.

0004 When using the pump, in order for the tube to exert sufficient suction power, the The tube must be thoroughly crushed. Therefore, when adjusting the position of the roller, it is necessary to Press the presser foot against the roller with strong force to fix its position. It was adjustable and movable elastically.

[0005]

[Problem that the idea aims to solve]

However, in the conventional example, the tube holder is fixed to the roller. In the case (Fig. 2(a)), due to the above-mentioned error, the tube is The life of the tube was significantly reduced due to excessive crushing between the two tubes. Also , Appropriate roller position to achieve both tube life and tube suction power. There was a problem in that it required time and effort to make adjustments to search for .

[0006] Therefore, in order to solve this problem, always keep the tube presser against the roller. The tube holder elastically holds the tube in the optimal position by squeezing the tube. An attempt was made to do so. In this case, move the tube in parallel while keeping it in an arc shape. A conventional example (Fig. 2(b)) with a sliding surface was devised to Abnormalities in sliding properties are likely to occur due to wear on the sliding surface of the guide, and parallel movement alone is not sufficient. The way the tube presser hits the roller tends to be biased, and it may not always be in the optimal position. First, there were problems such as the tube life not being significantly improved.

[0007] Therefore, in order to solve this problem, we decided to use one end of the tube presser as a fulcrum. An attempt was made to hold the other end elastically (Fig. 2(c)). In this case, The tube presser only hits the roller at one point, so the tube presser must be pressed with strong force. I had to press it against the rollers. Because a strong force is applied to one point, the life of the tube is The problem was that lifespans were significantly shortened.

[0008] As mentioned above, in all conventional embodiments, the tube life is short and frequent I had to replace the tube.

[0009]

[Means to solve the problem]

In order to solve the above problem, this idea uses a plate spring to connect the tube to the roller. The presser foot is elastically held in the air to eliminate sliding surfaces, allowing for parallel and rotational movement. accomplished.

0010

[Effect]

In the peristaltic pump configured as above, the tube holder is , the tube is always crushed with a constant force, and the position of the tube presser is By changing while performing parallel and rotational movement as the This results in crushing the tube at the optimum position.

[0011]

【Example】

An embodiment of this invention will be described below based on the drawings. Figure 1 shows the configuration of the present invention, showing the outer periphery of a roller holder 5 with a rotating shaft. Six rollers 4 are arranged. Tube facing roller holder 5 There is a presser foot 2, and the tube presser 2 on the side facing the roller holder 5 is shaped like an arc. A tube 3 is disposed between the two. Roller ho of tube presser 2 There is a leaf spring 1 between the side not facing the ruler 5 and the leaf spring support part 6, and the tube presser It acts to elastically press the roller 2 against the roller 4 side, and the tube between the two Crush Bu3. In this embodiment, the tube holder 2 and the leaf spring 1 are joined at two places, The leaf spring 1 is connected to and supported by the leaf spring support portion 6 at one point.

0012 FIG. 3 shows the operation of the peristaltic pump, which is arranged in the roller holder 5. The roller 4 rotates clockwise and holds the tube 3 between it and the tube presser 2. By repeating the movements shown in Figures 3(a), (b), (c), and (d), The fluid inside the tube (shaded area) is transported. In the embodiment shown in FIG. The web presser foot 2 is elastically pressed against the roller 4 by a leaf spring 1. , even if the shortest distance between the roller 4 and the tube presser 2 changes, the tube 3 will not be excessively It is always held down with a constant force without being held down.

[0013] Further, the tube presser 2 is held in the air using the plate spring 1. Tube presser 2 The position of is determined by following the roller 4. Here, the tube presser 2 is the roller 4 It does not slide against surrounding members when it moves with the rotation of. FIG. 5 shows another embodiment of the present invention, and FIGS. 5(a), (b), and (c) are implementations of FIG. The relationships between the tube presser 2 and the leaf spring 1, and the leaf spring support part 6 and the leaf spring 1 are the same as in the example. However, the shape of the leaf spring and the connection relationship between the leaf spring 1 and the tube presser 2 are different.

[0014] In FIG. 5(d), the leaf spring 1 is joined to the tube holder 2 at one point, and the leaf spring support part 6 is connected to the tube holder 2 at one point. It is joined and supported at two points. 5(e) and (f), the leaf spring 1 is connected to the tube presser 2. It is joined and supported at one point to each of the leaf spring support parts 6. FIG. 6 shows an embodiment of the present invention having a plurality of tube holders. Figure 6(a) shows two tube holders placed symmetrically with respect to the roller holder 5. This is what was installed. (The leaf spring, leaf spring support, and tube are not shown. ) Figure 6(b) shows four tube holders placed in the direction along the rotation axis of the roller holder 5. 2. A plate spring 1 is arranged, and a tube is placed between the roller 4 and each tube presser 2. 3 is a cross-sectional view of an embodiment in which a

[0015]

[Effect of the idea]

As explained above, this idea uses a leaf spring to elastically attach the tube holder to the roller. Since it is configured to press against the tube, the tube holder always holds the tube with a constant force. As the tube is crushed, the position of the tube holder moves in parallel and rotates as the roller rotates. By changing with rolling motion, the tube is always crushed in the optimal position, As a result, the tube life is significantly improved.

[0016] In addition, by holding the tube holder in the air using a leaf spring, the sliding surface is This will extend the life of the pump. FIG. 4 is a measurement diagram showing the effect of this invention. This is an example of measuring conveyance capacity and tube life. In the conventional case, the tube was removed in about 60 hours. However, in the example of the present invention, no damage was observed even after more than 450 hours of measurement. It was. In addition, an increase in the amount of sample conveyed was observed, which may be due to the "fitting in" of the tube. It was.

[0017] Furthermore, since the structure is simple, manufacturing costs are low.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIGS. 2(a) to 2(c) are perspective views showing conventional peristaltic pumps, respectively.

FIG. 3 is an explanatory diagram of the operation of a peristaltic pump.

FIG. 4 is a graph showing the results of measuring the effectiveness of this invention.

FIGS. 5(a) to 5(f) are perspective views showing other embodiments of the present invention, respectively.

FIGS. 6(a) and (b) each show an embodiment of the present invention having a plurality of tube holders, with the embodiment in (a) being a side view and the embodiment in (b) being a plan sectional view. .

[Explanation of symbols]

1 leaf spring 2 Tube holder 3 tube 4 roller 5 Roller holder 6 Leaf spring support part 7 Coil spring 8 Guide 9 Fulcrum

Claims (11)

[Scope of utility model registration request] 1. A tube holder formed in an arc shape, a roller holder having a rotating shaft, a plurality of rollers rotatably disposed circumferentially on the roller holder, and an elastic tube. The tube is placed between the tube holder and the roller, and the roller is rotated on the circumference while introducing fluid into the tube.
In a peristaltic pump, in which the tube holder and the outer edge of the roller squeeze the tube to transport fluid inside the tube, the tube holder is held in the air so that it is elastically pressed against the roller by a leaf spring. A peristaltic pump characterized by: Claim 2: The tube holder is joined to the leaf spring at two places, the leaf spring holds the tube holder elastically against the roller, and the leaf spring is held at one point. The peristaltic pump according to claim 1. [Claim 3] The tube holder is joined to the leaf spring at one point, the leaf spring holds the tube holder elastically against the roller, and the leaf spring is held at two points. The peristaltic pump according to claim 1. 4. The tube holder is joined to the leaf spring at one location, the leaf spring holds the tube holder elastically against the roller, and the leaf spring is held at one point. The peristaltic pump according to claim 1. 5. The peristaltic pump according to claim 1, wherein the leaf spring has a plate-like shape. 6. The peristaltic pump according to claim 1, wherein the leaf spring has a U-shape. 7. The peristaltic pump according to claim 1, wherein the shape of the leaf spring has one or more curved portions within the same plane. 8. Peristaltic pump according to claim 1, characterized in that the number of rollers is from 2 to 12. 9. The peristaltic pump according to claim 1, further comprising a plurality of tube holders and leaf springs. 10. The peristaltic pump according to claim 9, wherein the plurality of tube holders and leaf springs are arranged in a direction perpendicular to the rotation axis of the roller holder. 11. The peristaltic pump according to claim 9, wherein a plurality of tube holders and leaf springs are stacked in a direction along the rotational axis of the roller holder.