1. An interior cleaning device for a machine tool comprising a pipe arranged inside a cover covering at least a periphery of a machining section of the machine tool, and a pump for supplying liquid into the pipe, the interior cleaning device being for ejecting liquid from the pipe and cleaning accumulated substances accumulated inside the cover, wherein the pipe includes:
a first pipe provided with a first ejection section for ejecting liquid or air into the cover;
a second pipe installed inside the first pipe and provided with a second ejection section at a part facing other than downward in a vertical direction.
2. The interior cleaning device for the machine tool according to claim 1, wherein a hole for supplying air is provided to the first pipe, and air is supplied between the first pipe and the second pipe.
3. The interior cleaning device for the machine tool according to claim 1, comprising:
a check valve for preventing liquid or air from flowing into the pump from the second pipe.
4. A cleaning pipe used by an interior cleaning device for a machine tool, the cleaning pipe being for carrying out cleaning by ejecting liquid, wherein the cleaning pipe includes:
a first pipe provided with a first ejection section for ejecting liquid or air;
a second pipe installed inside the first pipe and that is provided with a second ejection section at a part facing, when installed, other than downward in a vertical direction.
The claims below are in addition to those above.
All refrences to claims which appear below refer to the numbering after this setence.
1. A superconductive microstrip filter, comprising:
an input coupling line, for receiving signals to be filtered and coupling-outputting said signals;
a plurality of U-type superconductive microstrip resonators with the same structure and dimension, for performing filtering process for said signals output by said input coupling line to obtain filtered signals in a corresponding frequency band and then coupling-outputting said filtered signals;
an output coupling line, for coupling-outputting said filtered signals outputted by said plurality of U-type superconductive microstrip resonators;
wherein each of said plurality of U-type superconductive microstrip resonators comprises a superconductive microstrip line bent to a U-type structure having a longer side and a shorter side that are parallel and of different lengths, the superconductive microstrip line having a whole length of half of the wavelength corresponding to the center frequency of said superconductive microstrip filter;
wherein said longer sides and said shorter sides of all of said plurality of U-type superconductive microstrip resonators are parallel, and wherein each neighboring pair in said plurality of U-type superconductive microstrip resonators is arranged axisymmetrically, the U-type superconductive microstrip resonators of each of said neighboring pairs having said longer side closer to a symmetrical axis than said shorter side.
2. The superconductive microstrip filter of claim 1, wherein the interval between each of said plurality of U-type superconductive microstrip resonators is determined in accordance with particular requirements for designing said superconductive microstrip filter.
3. The superconductive microstrip filter of claim 1, wherein the U-type superconductive microstrip resonator which is closest to said input coupling line among said plurality of U-type superconductive microstrip resonators has a top end of said longer side or said shorter side closest to said input coupling line aligned with a top portion of said input coupling line.
4. The superconductive microstrip filter of claim 1, wherein the U-type superconductive microstrip resonator which is closest to said output coupling line among said plurality of U-type superconductive microstrip resonators has a top end of said longer side or said shorter side closest to said output coupling line aligned with a top portion of said output coupling line.
5. A superconductive microstrip filter comprising a plurality of U-type superconductive microstrip resonators, wherein:
each of said plurality of U-type superconductive microstrip resonators comprises a superconductive microstrip line bent to a U-type structure having a longer side and a shorter side that are parallel and of different lengths;
any two neighboring U-type superconductive microstrip resonators in said plurality of U-type superconductive microstrip resonators are arranged axisymmetrically and in parallel with each other; and
the superconductive microstrip line of each of said plurality of U-type superconductive microstrip resonators has a length of half of the wavelength corresponding to the center frequency of said superconductive microstrip filter.
6. A superconductive microstrip filter comprising a plurality of U-type superconductive microstrip resonators as recited in claim 5, said superconductive microstrip filter further comprising:
an input coupling line for receiving signals to be filtered and coupling-outputting said signals; and
an output coupling line, for coupling-outputting filtered signals outputted by said plurality of U-type superconductive microstrip resonators.
7. A superconductive microstrip filter comprising a plurality of U-type superconductive microstrip resonators as recited in claim 5, wherein said longer side of each of said plurality of U-type microstrip resonators is closer to a symmetrical axis of said axisymmetrical arrangement than said shorter side.
8. A superconductive microstrip filter comprising a plurality of U-type superconductive microstrip resonators as recited in claim 5, wherein said shorter side of each of said plurality of U-type microstrip resonators is closer to a symmetrical axis of said axisymmetrical arrangement than said longer side.
9. A superconductive microstrip filter comprising a plurality of U-type superconductive microstrip resonators as recited in claim 6, wherein the U-type superconductive microstrip resonator which is closest to said output coupling line among said plurality of U-type superconductive microstrip resonators has a top end of said longer side or said shorter side closest to said output coupling line aligned with a top portion of said output coupling line.