JPS60153870A - Medical hose pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hose pump, and more particularly to a housing having a drive shaft mounted thereon, a shaft piece extending obliquely from the drive shaft, and a shaft piece located on the shaft piece and extending substantially relative to the housing. a swashplate fixed to prevent rotation; an annular hose bordering the front surface of the swashplate and having one end forming an inlet and the other end forming an outlet; and a ring hose mounted on the housing to support the hose. The present invention relates to a medical hose pump equipped with a cover.

Patent Application No. 83 105 573.6 for this kind of horse pump in the technical field; Japanese Patent Application No. 5i3-1
30145), there are two hoses arranged in parallel in a common hose. Each hose is provided with its own swamp. have a common inlet and a common outlet 1], and these swan plates are either out of phase or
A uniform feed rate is achieved by making the counterphase ν. When the hose tightening area of the swansh plate changes from the outlet end of the hose to the inlet end, the feed of the hose bong 7° is briefly interrupted. This kind of hose bong 7
Since this switching takes place at various times in .degree., a temporary change in the feed rate caused by this has no effect. A two-hose pump like this.

Since it has only a single inlet (one inlet), its use allows only one type of fluid to be administered to the patient.

There are some drugs that must be mixed with each other immediately before administration to the patient. Such mixing cannot be accomplished using the hose pump described above.

The object of the invention is to provide a hose pump of the first-mentioned type in which two substances are mixed together immediately before they are administered to the patient.

According to the present invention, this problem can be solved by arranging two hoses in parallel on a common plane, providing each hose with a swash plate, and driving the swash plates at the same speed by a common drive means. was solved by providing separate inlets and a single outlet for the hose.

By using the hose pump according to the invention, sensitive drugs can be mixed together immediately before administration to the patient. The short transfer time from the outlet of the hose pump to the patient is usually not sufficient for the drugs to react with each other. The two-hose pump according to the invention allows relatively high viscosity drugs to be mixed with other drugs.

According to a preferred embodiment of the invention, the swashplates of both hoses are driven in mutually opposite rotational directions and in phase. In this case, even if the transfer of both pumps is briefly interrupted at the same time, one pump is temporarily prevented from delivering to the outlet of the other pump. Although both media are mixed with a precisely uniform mixing ratio, the flow rate per unit time is not unconditionally constant and there is a short interruption in each cycle of the hose pump, which in most applications is acceptable.

Hereinafter, embodiments of the present invention will be further described based on Figure 1.

FIG. 1 is a longitudinal sectional view of the hose pump.

FIG. 2 is a sectional view taken along line II--II in FIG.

FIG. 2a is a sectional view of a modified embodiment of FIG. 2;

3 is a partial front view of the hose pump taken in the direction of arrow Ill in FIG. 1; FIG.

FIG. 4 is a longitudinal sectional view of the operating section of the two-hose pump.

ls is a schematic representation of the cover of the two-hose pump shown in FIG. 4 in the open state with the hose inserted. FIG. 6 is the state of use of the two-hose pump shown in FIGS. 4 and 5. FIG.

The hose pump shown in Figs.
The housing includes a housing (10) having a housing (10), in which a housing (12) is housed so as to be movable in the longitudinal direction. Inside the sleeve (12), a ball bearing (
13) supports a shaft 7) (14), which is connected to an electric motor (15) via a reduction gear (16).
) is driven by. drive shirt) (17) is formed by the output shaft of the reduction gear (16);
The shaft (1
4), Sha7) (14) is the output Sha7)
(17) so that it can move slightly in the axial direction.

The shaft 7) (14) has an inclined shaft piece (18) at its output end, the axis of which is
14) forms an acute angle a with the axis of A swash brake (20) is installed on this shaft piece (18) via a ball bearing (19). The pole bearing (19) and the swash plate (20) are present in a chamber (21) inside the housing cage 0).

This chamber is closed by a cover (22).

In this embodiment, the swash plate (20)
consists of a ring whose outer end surface (23)
is inclined in accordance with the angle α. The intersection of (14) and the axis of the shaft piece (IS) lies on the plane of the average diameter of the end surface (23)] [i.e. the diameter for the center of the conical surface of the end surface (23)]. To position.

There is a ball bearing (19) inside the ring,
The outer end surface of the ring is sealed by the sealing plate (24) (20).
) axis＞? No liquid flows out through η, and around IIL' (20)
5) +1111 machining force was individually specified, and the outside machining of the acid film was performed.
What about Nshi? ) is fixed to the side wall of the chamber (21) of the unong (10).

Therefore, the seal spray) (24) is attached to the hose (24) along with the acid film.
(20)
and the drive means to prevent liquid from leaking.

The hose (26) is fixed to the underside of the cover (22).

As is clear from FIG. 2, the hose (26) is annularly curved and the inlet (27) and outlet (28) extend radially in juxtaposition to each other. The inlet (27) and outlet (28) are
Coupling piece (29) formed in a substantially upward shape
The inflow nipple (30) and outflow nipple (30') of the coupling piece are connected by
22).

The hose (26) is connected to the annular groove (31) on the lower side of the cover (22).
) is inserted within. This annular groove (31) is limited to the same depth on the inside by an axially projecting projection (32) and on the outside by a surrounding edge (33). 1st
As is clear from the figure, an annular swash plate (20
) engages with the annular groove (31) of the cover (22), and in this case, the depth of its penetration changes on the circumference depending on the inclination of the swat spray (20). Between the end surface (z3) of the swirl plate and the bottom of the annular groove (31) a hose (26) is axially clamped together.

As is clear from Figure 1, Swatschspree) (2
The average diameter (a) of the annular end surface (23) of 0) is as large as the average diameter (b) of the annular 2F7 (31) or the average diameter of the hose ring. As a result, the end surface (2
3) does not rotate within the groove (31), but has a pure rolling motion within the groove. Average diameter (a) and (1
] ) is different, the swash plate ) (2,0) will rotate slowly in the housing around the axis of the shaft piece (is), so that the swash plate exerts a shearing effect on the hose, Causing friction losses that reduce efficiency.

Cover'-(22) i Soil hinge (34) i Therefore,
is fixed on the housing (10) so that it can be opened as shown in FIG. The coupling piece (29) has a hinge (
34) at the end of the cover (22) opposite. This end is provided with a longitudinal groove (35). The hose (26) inserted into the cover (22) from below is connected to the hose (26).
6) is held by a joining plate (36) that partially covers the inlet 11111 end and the outlet 1111 end. Between these connecting plates there is a gap large enough to allow the hose (26) to be removed 1) from the cover (22) with relatively little deformation.

The embodiment of FIG. 2a corresponds generally to that of FIG. The difference is that in Fig. 2, instead of the joint plate (36) that holds the hose (2G) to the cover, there is a semi-cylindrical bulge on the edge of the vertical groove (35) of the cover (22). (36'
), the bulge presses toward the other end of the hose near the coupling piece (29). In this way the hose is deformed, the ends of the hose are pressed slightly together and the clamping is held by action within the cover (22).

A claw (37) is provided on the end of the cover (22) opposite the hinge (34) to keep the cover (22) closed within the housing (10). This claw (37) is mounted on the cover (22) by a hinge pin (38) and is pressed into a locking position by a spring (39). As shown in FIGS. 2 and 3, the outer end (40) engages a recess in the side of the housing (10) to secure the cover (22) closed to the housing (10). When the ends (40) are spread apart from each other by lateral compression of the claws (37) under the compression of the spring (39), the cover (22) is locked on the housing (10) and lifted up. It ends with being able to do it.

To use a hose pump, first of all, the hose (26
) together with the coupling piece (29) into the cover as shown in FIG. The cover (22) is then closed and locked onto the housing (10).

As a result, the Swatspray (20) is pressed very firmly against the hose (26) in its most protruding area, so that it tightens in the annular groove (31). In this way, a single prong is formed along the periphery of the ring formed by the hose (26). This nip is circumferentially long enough so that no short circuits occur at the inlet and outlet. Both ends of the hose (27) and (
28) are briefly clamped together. Motor (15
) turns on, the shaft 7) (14) rotates, and the swatspray 1be20) rotates without turning (Tau+nell) eu+eBunF
i) Do.

Due to this rocking movement, the part of the hose (26) where the strongest tightening τ1 injury occurs pivots at a constant speed along the ring formed by the hose. In this way, the liquid present in the hose (26) is forced from the inlet (27) to the outlet (28).

After use, the cover (22) flips open when the claw (37) is released. In this state, the hose (2
σ) is removed and replaced together with the coupling piece (29).

Sha7) (1,3) and swash plate (20)
Ball bearings (13) and (2) for supporting
4) not only serves as a radial ball bearing, but is also capable of transmitting axial forces, whereby the compression of the spring (41) is swanspray) (20
). This spring (41) is supported on the rear end wall of the housing (10) and is pressed against the ring shoulder (42) of the sleeve (12), so that the sleeve (12) is connected to the shaft 7) (14) and the ball bearing (13). ) and (19) and swash plate (
20) in the direction of the hose (26) and cover (22). The sleeve (12) is attached to the housing (10
) to prevent rotation within the housing (
10) A radially protruding pin (43) is provided on the sleeve (12) that protrudes into an axial groove (44) in the wall.

This pin (43) also serves as an axial stop;
This prevents the swashplate from falling out of the housing when the cover is opened, and also prevents the swashplate from coming into contact with (32) and (33) and causing damage when the cover is closed without a hose. 1 (Jj stop.

A swat spray that projects farthest in the axial direction and that can tighten the hose (26) the most strongly 1. A portion of (20) swirls on a ring formed by the hose, so that liquid is delivered from the inlet (27) to the outlet (28).

In the embodiment of FIGS. 4 and f55, two hose pumps are arranged in parallel in a common housing (10). Swanch plates on both hose pumps (20
) are driven in opposite directions to each other and these inlets (27)
are separate inlets (30a) and (301+), respectively.
connected to. The outlets (28) are interconnected and connected to a common outlet (30'). The compling piece (29) is provided in the gap (45) of the cover (22), which gap is defined by the gap (45) of the cover (22) in which the hinge (34) is located.
Open on the side and the opposite side.

As is clear from Figure 4, both swat sprees)
(20) has no relative phase shift. The left Swastspree) (20) is the coupling piece (29)
) (20) while tightening the part of the corresponding hose on the side adjacent to the coupling piece (29) most tightly. .

In the case of the embodiment of FIGS. 4 and 5, the cover (22)
accommodates both hoses (26) together located in a common plane. The hose (26) together with the camping piece provided between them forms a disposable unit.

FIG. 6 schematically shows how the two-hose pump (46) shown in FIGS. 4 and 5 is used.

The two reservoirs (47) and (48) deliver different drugs to the two-hose pump (46). The outlet of the storage container (47) is connected via a hose with an inlet (30a), and the outlet of the storage container (48) is connected to an inlet (301).
1) respectively via hoses with hose pumps (4
6). At the outlet of the two-hose pump (46), both fluids are mixed with each other and then led to the outlet (30'') connected to the patient.

・・１． Additional relationship The invention described in claim 7 of Patent Application No. 130145 of 1982 provides that the drive shirt (1, 4) is
an angled housing (10), a shirt piece (18) extending obliquely from the drive shaft, and a shirt piece (18) located at and fixed substantially non-rotatably with respect to the housing; Swatsupree ) (20
), a circular hose (
26), and a cover (22) placed on the housing to support the hoses, wherein the two hoses (26) are arranged in a common plane.
The hoses are arranged in 1 rows, and each hose is provided with a swatspray-1, (20), and a swatspray + (20).
) or driven at the same speed by a common drive means, both hoses (2G) or had a common coupling piece (29) with a single person '1' and a single outlet '1' (liii) This relates to a medical hose pump characterized in that two hoses (26) are arranged in parallel on a common plane, and each hose has a swan-brake (20).
Although the main part is that the drive shafts (20) are driven at the same speed by a common drive means, the present invention also provides a drive shaft (7) (14).
) is removed, a shaft piece (18) extending obliquely from the drive shaft, located on the shaft piece and not substantially rotating with respect to the housing. The swash plate (2
0), an annular hose (2) bordering the front surface of the swash plate and having one end forming an inlet and the other end forming an outlet.
6), and a medical hose pump comprising a cover (22) installed on the housing and supporting the hoses, in which two hoses (26) are arranged in parallel on a common plane, each Each hose has a swash plate (
20) is provided, the main part being that the swath spray (20) is promoted at the same speed by a common drive means, and both hoses (26) have separate inlets and a single outlet. This invention relates to a medical hose pump characterized by the following, and falls under Article 31, Paragraph 1, Item 1 of the Patent Law.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a hose pump according to the present invention. FIG. 2 is a cross-sectional view taken along line 11-11 in FIG. FIG. 2a is a sectional view showing a second modified embodiment. 3 is a partial front view of the hose pump taken in the direction of arrow II+ in FIG. 1; FIG. FIG. 11 is a longitudinal cross-sectional view of the operating part of one embodiment of the two-hose pump according to the present invention. Figure 5 shows a schematic diagram of the cover of the two-hose pump shown in Figure 4 in the open state that captures the inserted hose.
FIG. 5 is a schematic diagram showing how the two-hose pump shown in FIGS. 1 and 5 is used. (10) is a housong, (11) is a cylindrical perforation, (1
2) is a sleeve, (13) is a ball bearing, (14)
) is the shaft, (]5) is the motor, (16) is the reduction gear, (17) is the drive shaft, (18) is the shaft piece, (19) is the ball bearing, (, 20) is the swansh plate, ( 21) is a chamber, (22) is a cover, (23) is an end surface, (24) is a seal plate,
(25) is membrane, (26) is Bose, (27) is entrance, (
28) is the exit, (29) i soil cambling piece, (3
0) is the inflow nipple, (30') is the outflow nipple, (
30a) and (30b) are 1 inflow, (3], )i,
is an annular groove, (32) is a protrusion, (33) is an edge, (34)
) is the hinge, (35) is the vertical groove, (36) is the joint plate, (3
6' ) is the bulge, (37) is the claw, (38) is the hinge pin, (39) is the spring, (40) is the end, (4
1) is a spring, (42) is a link shoulder, (4
3) is the pin, (44) is the shaft groove, (45) is the gap, (46
) indicates a two-hose pump, and (47) and (48) indicate a storage container. Patent applicant Intermedicut Gesellschaft
Mituto Beschrenchtel Hufsong Agent Patent Attorney Haga Aoyama 2 people 26 FIG. 5 Procedural amendment (voluntary) April 1980 President of the Japan Patent Office 2. Name of the invention Medical Beaune Pump 3. Amended. Relationship with the case Patent applicant address Nuinu Country Zwaha-6020 Emembritta,
・ Gerlinuville Nutraase No. 74 Name: Intermedicat Gesellschaft Mitsut Beschlenktel//'7',/7ri Representative: Yono Ri...7 Retoin Nationality: Nuinu Country Representative: Reiner Petri 4 Agent Man

Claims (1)

[Claims] 1. A housing (10) to which a drive shaft 7) (14) is attached; a shaft piece (18) extending obliquely from the drive shaft; (20) an annular hose (20) bounded by the front surface of the swash plate, one end forming a mantle and an end or an outlet; 26), and a cover (22) installed on the housing and supporting the hose.
) in a medical hose pump,
Two hoses (26) are arranged in parallel on a common plane, one for each hose (20)
are provided and the swat hoses (20) are driven at the same speed by a common drive means, and both hoses (26
) Medical hose pump characterized in that it has a separate population and a single outlet. 2. The hose pump according to item 1, wherein both hoses (26) are provided with a common cover (22). 3. Swash plate (20) of both hoses (26)
) are driven in mutually opposite directions and in the same phase. 4. Swash plate (20) of both hoses (26)
) are driven in the same rotational direction with phase shifts. 5.Swansh plate (20) of both hoses (26)
) is driven in a reverse rotational direction.