JPS58101282A - Squeezing pump - Google Patents

Abstract

PURPOSE:To facilitate replacement of a pump tube by installing an elastic tube onto a pump head which can be freely mounted and demounted from a body and increasing the gap between a squeezing roller and the outer edge wall through sliding of a head base pushing tool. CONSTITUTION:An elastic tube 12 equipped with a joint 11 is installed onto a pump head 2 which can be mounted and demounted from a body, so a joint part 43, the driving shaft 22 of a squeezing roller 23, and the shaft 3 of a driving source 41 are automatically engaged and fixed properly. A pushing toll 26 slides on a head base 25 so that the distance of the pump head 2 to the shaft 3 can be controlled, and said pushing toll 26 is fixed by a screw 27. When the screw 27 is released, the pushing toll 26 slides, and the gap between the squeezing roller 23 and an outer edge wall A increases to facilitate insertion of a pump tube 1. With such a constitution, replacement of the elastic tube 12 can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a squeezing pump that forces a fluid stream by squeezing an elastic tube.

Shigeru pumps have the essential drawback that the elastic tube becomes fatigued in a short period of time, resulting in poor performance. For this reason, conventionally, a set of relay fittings is attached to the piping connected to the squeezing pump and the elastic tube forming the squeezing pump is removed from there, or a set of relay fittings is installed on the elastic tube forming the squeezing pump, The elastic tube had to be replaced by inserting the piping tube in the ξ direction.・ Conventional straining pumps like this require the trouble of inserting and removing the elastic tube or piping tube from the relay device, and the tension of the elastic tube. There were drawbacks such as variations in performance due to irregularities in l[.

The present invention has been made to eliminate such drawbacks of the prior art, and its purpose is to provide an entire straining pump constructed so that the elastic tube can be easily replaced.

To describe the gist of the present invention, an elastic tube with a joint is attached to a pump head that can be easily attached and detached from the main body without crushing the elastic tube in advance, and after setting the amount of crushing at the time of use, the elastic tube is placed in a predetermined position. It is configured so that the piping can be done in advance by inserting it into the joint part, which is integrated with the drive source, and the drive shaft of the squeezing roller and the shaft of the drive source are automatically joined and fixed, respectively. The next step is to install a pump head.

A disaster example of the present invention will be described with reference to FIG. 1.2. 1 is a pump tube consisting of a joint 11 and an elastic tube 12; 2 is a pump head that squeezes the pump tube 1;
Reference numeral 4 denotes a housing that integrally includes a motor 41 that is driven by a driving source, a pump head 2t, a spring 42 for holding and fixing the pump head 2t, and a joint 43t. A finger rest 49 is provided on the side of the pump head 2 for use in attaching and detaching the pump head. The pump head 2 has a shaft 3 to which two discs 21 are fixed. The disk 21 has a shaft 22 concentrically with respect to the shaft 3.
Six rollers are attached to this shaft 22 so as to rotate smoothly. The shaft 3 is attached to a head base 25 via a bearing 24.

A pusher 26 slides on the head base 25 on a horizontal plane so that the distance to the shaft 3 can be adjusted, and can be fixed with a screw 27. The head base 25 and the pusher 26 are seated in a cylindrical shape having an outer edge wall Ak concentrically with the shaft 3. When the screw 27 is loosened, the pusher 26 slides, and the gap between the squeezing roller 23 and the outer wall A becomes larger, allowing the pump tube 1 to be easily inserted. A groove 28 is formed in the head base 25 to hold the joint 11 and a part of the elastic tube.

The arrangement of the pump tube greatly influences the fit of the elastic tube.

The above-mentioned joint 43 is fixed to the housing 4 to a metal fitting 44, and this metal fitting 4-4 slides in the direction of deflection of the spring 45t by means of a spring 45 and a guide pin 46. When the pump head 2 is inserted into the housing 4 and returned to its original position in this manner, the joint 11 and the joint 43 are connected to integrally form a flow path.

An outer cylinder 31 is coaxially fixed to the shaft 3, and an inner cylinder 32 is configured to slide within the outer cylinder 31 and be pushed out by a spring 33. Although not shown, the inner cylinder 32 and the outer cylinder 3
1 rotates integrally (JL in both forward and reverse directions, and is engaged so as not to come off to the outside. A pin 48 is fixed to the shaft 47 of the motor 41, and this pin 48 is inserted into a groove provided in the inner cylinder 32. 39, and the shaft 47 and shaft 3 rotate together.Now, when the pump head 2 is inserted into the housing 4.

At that time, the pin 48 may not enter #$39, but once the motor 41 starts rotating, it will rotate the engagement shaft 3 within one rotation.

Regarding the connection of the elastic tube and the piping joint, in Fig. 1, the fitting 44 is pushed down as shown in the figure to attach and detach the fitting 43 and the fitting 11. In this case, when removing (or attaching) the pump head, , 0) Pushing down the metal fitting 44 %) Putting your finger on the finger hook 49 (as shown) involves two operations: pulling it out to the left (or pushing it in to the right).

The embodiment shown in FIG. 3 is an improvement over this.

In other words, since the gold A44 is configured to slide in the direction of pulling out or pushing in by placing a finger on the finger hook 49,
With only one operation of pulling out or pushing in the pump head 2, the joint 11 and the joint 43 are automatically connected. Describing the joint in detail, it is necessary to construct it so that the inner diameters of the passage 51 and the flow passage 52 are not different in level, and the dead space at the joint is minimized. For example, the joint 11 has a conical shape, and the joint 43 has a conical shape.
is preferably formed into a hemispherical shape (or vice versa).

When the head 2t of the pump 1 is not in use, the pusher 26 is separated from the shaft 3, that is, the elastic tube 12 is kept at the outer edge -A so as not to be crushed by the ironing row 223.

According to the present invention, the performance deteriorates due to factors such as the dimensions of the elastic tube, the material, the pressure and flow velocity of the elastic tube, etc.
In this case, it is now possible to replace the pump head with a one-touch operation by pushing the pusher of the pump head, which is pre-loaded with a pump tube, into the specified position. This is of great significance as it allows the pump to be handled more easily.

With the conventional method, it took at least 5 minutes to replace the elastic tube, but with the present invention, it can now be done in a few seconds.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway dnltIl1 diagram of an embodiment of the present invention. FIG. 2 is a front view of FIG. 1, and FIG. 3 is an enlarged sectional view of the vicinity of the joint portion of another embodiment. l...Stretching tube% 2...Pump head, 3
...Shaft, 11.43...Joint, 12...Elastic tube, 33° Figure 1

Claims (1)

[Claims] 1. A squeezing pump that pushes out fluid by squeezing an elastic tube is equipped with a squeezing roller, which is connected to a liquid inflow pipe and a liquid outflow pipe.
No. 1 housing where a joint is provided. a pump head detachably attached to the housing, the pump head having a curved outer edge wall and having an elastic tube attached at both ends with second joints; A straining pump.