JPS58158388A - Roller pump - Google Patents

Abstract

PURPOSE:To enable to set the entire pump circuits at a time, by closing a cover to which are fixed a plurality of roller pumps corresponding to a plurality of liquid feed passages formed by an elastic tube or the like disposed beforehand on a flat surface. CONSTITUTION:A roller holder 6 has several rollers 3 supported by respective shafts 4 in a freely rotatable manner, and the roller holder 6 and spring holders 20 are connected together by springs 5 so that they are turned by a drive shaft 2 by the aid of a bearing 21. Another bearing 22 is arranged to be rotatable and slidable in the axial direction. By disposing a liquid conveying, elastic tube 7 at the position on a base plate 12 where it is pressed by rollers 3 with a proper clearance 26 left therebetween, liquid can be conveyed by two rollers 3 along with rotation of the roller holder 6 at the rate of a volume 27. With such an arrangement, the entire pump circuit can be set at a time simply by opening a cover 29 having a case 19 of a roller pump fixed thereto around a pin 28 to a position shown by the two-dot chain line in the drawing and then setting the liquid conveying tube 7 at the correct position.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roller pump suitable for setting all pumps at the same time in a complicated infusion circuit in a device using a large number of roller pumps.

An example of the prior art will be explained with reference to FIGS. 1 and 2. The rotation of a motor 1 fixed to the substrate is transmitted to the roller holder 6 through a key 31 and a keyway 32. The roller holder 6 has
A plurality of rollers 3 are rotatably attached to a shaft 4.
The tube 7 is sandwiched between this and the guides B and k, and is compressed by the spring 5. The guide tube through which the volume 4 sandwiched between the two O-rollers 3 is transported by the rotation of the motor 1 is shown fixed to the substrate LHC with bolts 8, but the operation of fitting the tube 7 is an example. In order to overcome this drawback, if the guide B is mounted so as to be rotatable around the shaft, the tube 7 can be opened as shown by the chain double-dashed line, placed in the groove 17, and the setting pin drilled in the hole 11. It is thought that it will fit. If you pull knob 9, the setting pin will come off against the spring IOK, but there is not much difference in that attachment and removal are complicated and time consuming.

An object of the present invention is to provide a roller pump in which a plurality of roller pumps corresponding to a plurality of infusion channels formed by tubes or the like arranged on a plane and having elasticity can be set simultaneously.

The present invention provides a pump structure in which complex infusion channels are arranged in a planar manner, and when a large number of roller pumps are attached to a single cup, the entire pump circuit is closed at once. For rounding, the roller that crushes the infusion channel should be pressed against a plane perpendicular to the drive shaft.
In other words, the advantage is that the structure has a pressing force in the direction of the drive shaft.

FIG. 3 is a longitudinal sectional view showing an embodiment of the roller pump according to the present invention, and FIG. 4 is a sectional view taken along the line B in FIG. In Figures 3 and 4, the motor l attached to the board V
There is a pin U at the tip of the drive shaft 2, and the pin 4 engages with this to transmit rotation to the roller holder 6. The roller holder 6 has several rollers 3 rotatably supported on the shaft 4, and the roller holder 6 and the spring holder have a spring 5.
It is rotated by the drive shaft 2 through a bearing 21. Further, the bearing n is capable of sliding and rotating in the axial direction. The elastic infusion tube 7 on the substrate V is placed in a position where it is crushed by the roller 3, and when pressed to create an appropriate gap, the roller holder 6 rotates.
The infusion is divided into volumes of 27 using two rollers 3. The cover 29, which fixes the case 4 of the roller pump, can be opened as shown by the two-dot chain line centering on the transport column. In this state, setting the wheel fluid tube 7 is easy.

If the infusion tube is attached to a thin plastic plate, it will be easier to handle it.

III S Figure C, the motor 1 and roller holder 6 are fitted with the key 31 and key 32 so that they can slide in the axial direction and transmit rotation, and the axial sliding is possible within the gap path. Become. When the infusion tube is set on the cover 29,
Open it as shown by the two-dot chain line, close it as shown by the solid line,
If you fix it in the rock garden, the set is complete.

FIG. 6 shows an embodiment in which a plurality of roller pumps shown in FIG. 4 are used. Open the cover 29 with the pump as shown by the two-dot chain line, and place the infusion tube 7.7' on the board 12.
, 7', , , , and close and lock the cover 29 as shown by the solid line, the pins 6, δ', 25'', , , provided on the shaft of the roller pump will be connected to the motor 111'.
, 1' +++++ K setting is 9 pins, uI, 2Z,
, , , rollers 3.3', i' , , are pressed against the infusion tubes 7.7', 7'+, +.
! It becomes lK.

To infuse blood, a roller pump is often used, which is a flexible plastic tube that is squeezed with rollers to prevent germs from infecting the body by disconnecting it from the outside air. Moreover, in order to avoid problems such as blood type incompatibility, the tubes need to be set carefully since they are disposable. It is also a complex device that requires multiple infusion pumps.
1st tube is complicated and time consuming.

If the roller pump of the present invention is used, by arranging the tubes on a plane perpendicular to the drive shaft (for example, by pasting the tubes on a single plastic plate along the locus of the roller 3), the entire pump can be can be set, which greatly reduces operation time.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of a roller pump according to the prior art;
The figure is a plan view showing the positional relationship between a roller and a tube according to the prior art. FIG. 3 is a longitudinal sectional view showing an embodiment of the roller pump according to the present invention, and FIG. 4 is a sectional view taken along the line B in FIG. FIG. 5 is a longitudinal sectional view showing another embodiment of the roller pump according to the invention, and FIG. 6 is a longitudinal sectional view showing still another embodiment of the roller pump according to the invention. 3 is a roller, 4 is a roller shaft, 5 is a spring, and 7 is an infusion tube Name of the patent applicant Hitachi Koki Co., Ltd.

Claims (1)

[Claims] A structure having several rollers rotatably supported around a roller shaft, and a structure having a spring for pressing the rollers against an infusion channel provided in a plane perpendicular to the rotation drive shaft,
A roller pump that performs infusion by rotating around a rotational drive shaft.