JPH10184552A - Roller pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount a tube on a roller pump with light force by a tube mounter, and correspond it to a differential tube diameter by opening/closing a tube setter by a supporting point, and fixing the tube setter by a fastener at the time of closing the tube setter. SOLUTION: A tube passing groove 5 is formed larger than the diameter of a tube. The position where the tube is pressed by a roller 3 and a tuber setter 2 enlarges the space passing the tube so sufficiently by the tube setter 2 opening and closing a tube setter supporting point 9 as a supporting point so that the tube can easily be inserted into the space. In the case where the tube setter 2 is closed, a cramp lever 6 is rotated serving a cramp lever supporting point 10 as a supporting point, and thereby, a pressure cone apex a11 is rotated, and a pressure cone apex b12 connected to the pressure cone apex a11 is rotated serving the tube setter supporting point 9 as the supporting point. After fastening, fixing operation is carried out by a fastener which is composed of the cramp lever 6 and a link arm 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called roller pump for feeding a medical solution such as blood, infusion solution, replacement fluid, etc. by utilizing the ironing of a tube, and a structure capable of easily attaching and detaching a tube to and from the pump. Related to a roller pump.

[0002]

2. Description of the Related Art Conventionally, a roller pump used for sending a medical solution or the like at a medical site is a method in which a plurality of rollers are arranged at a predetermined interval on a concentric circle centered on a rotation axis of a rotor rotated by an electric motor or the like. The tube is wound around the outer circumference of these rollers, pressed by a tube setter surrounding the tubes from side to side, and the rotor is pressed against the tubes by rotating the rotor in the liquid feed direction while pressing. The movement is such that the chemical solution is sent.

However, in the conventional roller pump, since the space between the roller and the tube setter is narrowed in advance to such an extent that the tube is pressed, the tube is compressed in a narrow gap between the roller and the tube setter. Or by rolling the tube in accordance with the rotational movement of the rotor.

Further, there is a sufficient gap between the roller and the tube setter, and a mechanism for arranging the tube between the roller and the tube setter and then tightening the roller and the tube setter using a spring or fitting to press the tube. However, these devices are complicated and costly, and also require a great deal of force to tighten them.Many of these tasks are performed by nurses in medical settings, which is a serious task for women. Was. Further, there is a problem in that the fixed roller and the tube setter have a fixed distance, and therefore cannot accommodate different tube diameters.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and allows a tube wearer to easily mount a tube on a roller pump with a light force, and furthermore, a different tube. An object of the present invention is to provide a roller pump that can handle a diameter.

[0006]

That is, according to the present invention, a disk-shaped rotor is fixed to a motor rotating shaft protruding from a support plate, and the rotor has a plurality of rollers on its back surface with the motor rotating shaft as a central axis. A roller pump for squeezing the tube with a roller, comprising a tube setter for pressing the tube placed around the rotor and the rotor, the tube being arranged at equal intervals in the same direction on the concentric circles, The setter opens and closes with a support point,
A roller pump characterized in that fixing at the time of closing is performed by a fastener. In addition, the fixing point of the roller is shifted from the center axis of the roller, and further, guide pins are provided at locations corresponding to the front and rear ends of the roller in the longitudinal direction of the roller, and marks are also marked on the outer periphery of the rotor disk Is provided. Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view for explaining a tube mounting mechanism according to an embodiment of the present invention, and shows a state in which a tube setter is open. FIG. 2 similarly shows a state in which the tube setter is closed, and FIG. 3 shows a state seen from the lower part thereof. FIG. 4 is a view for explaining the rotor unit as viewed from the back of the rotor.

As shown in FIG. 1, the tube mounting mechanism of the roller pump according to the present invention mainly comprises a rotor (1) and a tube setter (2). The tube passage groove (5) should be larger than the tube diameter, and the tube should be rolled (3).
The structure where the tube setter can be opened and closed using the tube setter support point (9) as the support point can provide a sufficiently large space for the tube to pass, so that the tube can be easily inserted. Can be done.

When closing the tube setter, the action point a (11) is rotated by rotating the clamp lever (6) with the clamp lever support point (10) as a support point, and the action connected to the action point a. The point b (12) performs a rotary motion with the tube setter support point (9) as a support point. Because of the leverage principle, it can be securely tightened even with a small force. The fastening after the fastening is achieved by forming a fastener with a clamp lever (6) and a link arm (7) as shown in FIG.

Further, as described above, the tube passage groove (5)
Is designed to be wider than the tube diameter, making it easy to insert the tube, but the tube may move freely. In order to prevent this, when the tube setter is tightened, the tube passage groove will have a retaining plate (8).
This problem can also be solved by adopting a structure that can be hidden by the user.

Next, the structure of the rotor will be described. As shown in FIG. 4, the rotor (1) is provided with three rollers (3), but the number is not limited. However, the judgment should be made according to the cost and the distance that the tube is pressed by the roller and the tube setter. If the number of rollers is n, the distance to be pressed must be 1 / n or more of the circumference. The point of the present invention is to secure an area that can be sufficiently inserted when the tube setter is opened. Also, if the number of rollers is large, the tube does not drop to the effective height of the guide pin (4), so that the number of rollers is small. Is preferably 3 or 4.

Next, since the rotation axis of the roller (3) and the fixed axis to the rotor are displaced, the distance of the roller from the center axis of the rotor is changed by selecting a fixed point of the fixed axis at an arbitrary angle. Thus, different tube diameters can be accommodated. However, it is practically impossible for the user to make such an adjustment, and it is characterized in that the adjustment can be made according to the tube diameter used by the supplier. The eccentric distance between the roller rotating shaft and the fixed shaft is not particularly limited, but is usually in the range of 0.2 to 2 mm, preferably in the range of 0.2 to 0.8 mm because it is restricted by the tube passage groove. .

Next, the role of the guide pin (4) will be described. Since the liquid sending tube is sandwiched between the roller (3) and the tube setter (2) and has a structure in which the liquid is sent by being squeezed, there is a possibility that twisting or the like due to squeezing may occur. Further, since the roller has a gap between the support plate (13) and the rotor due to its structure, there is a risk that the tube may be deviated to a sideway due to torsion and become entangled in the gap. Guide pins are provided to prevent such sideways. Since this guide pin is located at the midpoint between the roller and the roller so as to be the lowest point of the tube, and protrudes to a position corresponding to the front and rear ends of the roller, the tube can be prevented from entering the gap between the front and rear ends of the roller, It can be located at the center of the roller and is safe.

Further, the mark on the rotor disk moves in accordance with the rotation of the roller pump, and is useful for confirming the operation. The mark is not particularly limited even if it has a different color or a different shape such as a depression. Mounting time Tightening torque Example 3 seconds ○ 0.5 kg ○ Comparative example 1 15 seconds × 3 kg △ Comparative example 2 20 seconds × 1 kg ○ Comparative example 3 3 seconds ○ 4 kg ×

[0015]

According to the present invention, the liquid supply tube can be easily mounted on the roller pump, and it is possible to cope with slightly different tube diameters. Useful.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention, with a tube setter open.

FIG. 2 is a front view of an embodiment of the present invention, in a state where a tube setter is closed.

FIG. 3 is a bottom view of one embodiment of the present invention.

FIG. 4 is a view seen from the back of a rotor according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor 2 Tube setter 3 Roller 4 Guide pin 5 Tube passage groove 6 Clamp lever 7 Link arm 8 Retaining plate 9 Tube setter supporting point 10 Clamp lever supporting point 11 Working point a 12 Working point b 13 Support plate

Claims (1)

[Claims] 1. A disk-shaped rotor is fixed to a motor rotation shaft protruding from a support plate, and a plurality of rollers on the back surface of the rotor are coaxially spaced on a concentric circle centered on the motor rotation shaft. A roller pump for squeezing the tube with a roller, comprising a rotor and a tube setter for pressing a tube placed around the roller, wherein the tube setter is opened and closed with a support point. A roller pump characterized in that fixing when closed is performed by a fastener.