JPH0532097Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pump head fixing device for a reciprocating pump in which a pump head including a piston, a cylinder, and a valve is configured to be detachable from the pump body.

[Prior Art] In recent years, in the medical field, surgical methods that utilize high-pressure liquid jets for targeted areas have been developed in place of conventionally used steel scalpels, electric scalpels, ultrasonic scalpels, and laser scalpels. Unlike other surgical methods, this method has the feature of being able to selectively release the vascular system such as blood vessels and parenchymal tissue. It can be effectively used for surgery on organs such as the liver.

Pumps, which are liquid pressurizing means used in this method, must be sterilized under particularly strict control due to the specific purpose of their use. Ta. In view of these circumstances, the applicant of the present application has already filed an application for a pump structure that allows easy sterilization.
Pumps used for liquid pressurization must, of course, be sterilized each time they are used to eliminate the presence of bacteria, and the frequency of sterilization is quite high, so the work of disassembling and reassembling the pump cannot be overlooked. . Therefore, it is desirable that the pump used as the liquid pressurizing means be one that can be easily and quickly disassembled and assembled for sterilization.

However, in the conventional method, the cylinder and the like that constitute the pump are fixed using fastening members such as a plurality of bolts and nuts, so it is not necessarily easy to do so.

[Problems that the invention aims to solve] Pumps used as liquid pressurizing means are sterilized quite frequently, and conventionally, when sterilizing a pump, the fastening member that tightens the pump head was removed and the pump was disassembled. . After sterilization, the pump head was assembled by tightening and fixing the pump head to the pump body with a plurality of fastening members such as bolts and nuts, so disassembling and assembling the pump was time-consuming and could not be done easily and quickly.

[Means for solving the problems] In order to solve the above problems, the present invention takes the following measures. A reciprocating pump in which a pump head including a piston, a cylinder, and a valve is configured to be removably attached to a pump body, and a support member fixed to the pump body, a pedestal on which the pump body is mounted, or a place adjacent to the pump body, and the support member. The object is achieved by a pump head fixing device comprising an arm member that is swingably supported by a member and restrains the pump head to the pump body, and a screw member that is screwed to the arm member and can be retracted and moved toward the pump head. This is what I am trying to do.

[Example] The present invention will be explained below based on the illustrated example. Reference numeral 1 denotes a pump body, and the pump body 1 is provided with a pump head 2 including a cylinder, a piston, and a valve. Reference numeral 5 denotes a support member fixed at a position adjacent to the pump body 1, and the pump head 2 is swingably supported on the support member 5.
An arm member 4 for restraining the pump body 1 to the pump body 1 is provided. A screw member 6 is disposed at the end of the arm member 4 and is screwed to the arm member 4 and is retractable toward the pump head 2. Furthermore, a handle wheel 3 is disposed on the screw member 6 as required. Further, a stopper 9 for the arm member 4 is disposed on the support member 5 as necessary to limit the range of swing of the arm member 4 so that the screw member 6 coincides with the axis of the pump head 2.

Now, when sterilizing the pump device as mentioned above,
By turning the handle wheel 3, the screw member 6 that abuts the pump head 2 is moved back from the surface 2a of the pump head 2, and the restraint of the pump head 2 to the pump body 1 is released. The arm member 4 is moved away from above the surface 2a of the pump head 2 by swinging up and down the contact surface 2a along the contact surface 2a with the screw member 6 of the pump head 2. As a result, the pump head 2 can be freely removed from the pump body 1. Further, the screw member 6
In addition to the method of swinging the arm member 4 along the contact surface 2a, there is also a method of swinging the arm member 4 so as to open it in the axial direction of the pump head 2 on the contact surface 2a side.

After the arm member 4 has swung to a position where it does not interfere with the removal of the pump head 2, the pump head 2 is removed from the pump body 1, and the next step is sterilization.

When assembling the pump head 2 to the pump body 1 after sterilization, after attaching the pump head 2 to the pump body 1, insert the arm member 4 so that the screw member 6 coincides with the axis of the pump head 2. oscillate. Next, by turning the handle wheel 3, the screw member 6 is made to protrude and the pump head 2 is restrained.
The assembly can be completed. In other words, the assembly of the pump can be completed by reversing the removal procedure.

[Effects of the invention] As explained above based on the embodiments, according to the invention, the pump head can be removed simply by tilting the arm member and rotating the screw member, without using multiple fastening members or tools. It is easy to assemble, requires less work, and reduces work time. In addition, storage of fastening parts, tools, etc.
There is no need for preparation, and the problem of losing fastening members and the like during removal is eliminated.

[Brief explanation of the drawing]

FIG. 1 is an external view of an embodiment of the present invention, and FIG. 2 is an external view of a conventional example. 1...Pump body, 2...Pump head, 2a
... Pump head surface, 3 ... Handle wheel, 4 ...
Arm member, 5... Support member, 6... Screw member,
7... Fastening member, 8... Frame, 9... Stopper.

Claims (1)

[Scope of utility model registration request] In a reciprocating pump in which a pump head including a piston, a cylinder, and a valve is configured to be detachable from the pump body, the pump body or a support member fixed to a pedestal on which the pump body is mounted, or a support member fixed to a position adjacent to the pump body, and the support member attached to the support member. A pump head fixing device comprising an arm member that is swingably supported and restrains a pump head to a pump body, and a screw member that is screwed to the arm member and is retractable toward the pump head.