Patent Publication Number: US-2023158696-A1

Title: Cutter apparatus for double pipe

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0163420 filed in the Korean Intellectual Property Office on Nov. 24, 2021, the entire contents of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     The present invention relates to a cutter apparatus for a double pipe. 
     BACKGROUND ART 
     In general, pipes are installed in a semiconductor line to supply each of various treating fluids used in the manufacturing of semiconductors, and among the pipes installed in the semiconductor line, pipes having a double structure are also used. Since the double pipe must be installed by cutting the outer pipe to be shorter than the inner pipe, it is not easy to safely cut only the outer pipe with the existing pipe cutter. 
     SUMMARY OF THE INVENTION 
     The present invention has been made in an effort to provide a double pipe cutter capable of safety cutting an outer pipe. 
     The object of the present invention is not limited thereto, and other objects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. 
     An exemplary embodiment of the present invention provides a cutter apparatus for a double tube for cutting an outer tube in a double pipe including an inner tube and the outer tube, the cutter apparatus for the double tube including: a main body which is grippable by a hand of an operator; a cylindrical protection member which is connected to the main body and into which the inner tube is inserted; and a cutter member including a blade for cutting the outer tube. 
     Further, the cutter member may be provided to the protection member. 
     Further, the blade may be folded on the protection member, and protrude from the protection member when the outer tube is cut. 
     Further, the protection member may be provided rotatably on the main body, and the main body may be provided with a driving unit for rotating the protection member. 
     Further, the cutter apparatus for the double tube may further include a cylindrical outer cover provided to the main body and formed to surround the protection cover. 
     Further, the outer cover may be made of a transparent material, and have a scale to check a length of the outer tube to be cut. 
     Further, the cutter apparatus for the double tube may further include a tube fixing member for fixing the double tube before cutting the outer tube. 
     Further, the tube fixing member may include pressing pins installed on the outer cover to pressurize the outer tube. 
     Further, the tube fixing member may include an expandable member which is installed inside the inner cover and is inserted into the inner tube to fix the inner tube by an expansion operation 
     Further, the cutter member may include: a support provided to the main body and adjustable in length; and a support ring installed at a distal end of the support and supporting the blade. 
     Another exemplary embodiment of the present invention provides a cutter apparatus for a double tube for cutting an outer tube in a double pipe including an inner tube and the outer tube, the cutter apparatus for the double tube including: a main body which is grippable by a hand of an operator; a cylindrical protection member which is rotatably connected to the main body and into which the inner tube is inserted; a cutter member provided to the protection member and including a blade for cutting the outer tube; and a driving unit for rotating the protection member. 
     Further, the blade may be folded on the protection member, and protrudes when the outer tube is cut. 
     Further, the cutter apparatus for the double tube may further include a cylindrical outer cover provided to the main body and formed to surround the protection cover. 
     Further, the outer cover may be made of a transparent material, and have a scale to check a length of the outer tube to be cut. 
     Further, the cutter apparatus for the double tube may further include a tube fixing member for fixing the double tube before cutting the outer tube. 
     Further, the tube fixing member may include pressing pins installed on the outer cover to pressurize the outer tube. 
     Further, the tube fixing member may include an expandable member which is installed inside the inner cover and may be inserted into the inner tube to fix the inner tube by an expansion operation 
     Still another exemplary embodiment of the present invention provides a cutter apparatus for a double tube for cutting an outer tube in a double pipe including an inner tube and the outer tube, the cutter apparatus for the double tube including: a main body which is grippable by a hand of an operator; a cylindrical protective member which is connected to the main body and into which the inner tube is inserted; a cutter member provided to the protection member and including a blade for cutting the outer tube; and a cylindrical outer cover provided to the main body and formed to surround the outer tube located outside the protection cover. 
     Further, the outer cover may be made of a transparent material, and include a scale for checking a cut length of the outer tube. 
     Further, the cutter apparatus for the double tube may further include a tube fixing member for fixing the double tube before cutting the outer tube. 
     According to the exemplary embodiments of the present invention, it is possible to safely cut the outer tube in the double tube. 
     The effect of the present invention is not limited to the foregoing effects, and those skilled in the art may clearly understand non-mentioned effects from the present specification and the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS.  1  and  2    are a perspective view and a front view illustrating a cutter apparatus for a double tube according to a first exemplary embodiment of the present invention. 
         FIGS.  3 A and  3 B  are diagrams illustrating a process of cutting an outer cover by the cutter apparatus for the double tube according to the first exemplary embodiment. 
         FIGS.  4  and  5    are a perspective view and a front view illustrating a cutter apparatus for a double tube according to a second exemplary embodiment of the present invention. 
         FIG.  6    is a modified example of the cutter apparatus for the double tube illustrated in  FIG.  4   . 
         FIG.  7    is a cross-sectional view illustrating a cutter apparatus for a double tube according to a third exemplary embodiment of the present invention. 
         FIGS.  8  and  9    are modified examples of a tube fixing member illustrated in  FIG.  7   . 
         FIGS.  10  and  11    are another modified example of the tube fixing member illustrated in  FIG.  7   . 
         FIGS.  12  and  13    are cross-sectional views illustrating a cutter apparatus for a double tube according to a fourth exemplary embodiment of the present invention. 
         FIG.  14  to  15 B  are views illustrating another example of a cutter member in the cutter apparatus for the double tube. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, an exemplary embodiment of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are illustrated. However, the present invention can be variously implemented and is not limited to the following exemplary embodiments. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein is omitted to avoid making the subject matter of the present invention unclear. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and actions. 
     Unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements. It will be appreciated that terms “including” and “having” are intended to designate the existence of characteristics, numbers, operations, operations, constituent elements, and components described in the specification or a combination thereof, and do not exclude a possibility of the existence or addition of one or more other characteristics, numbers, operations, operations, constituent elements, and components, or a combination thereof in advance. 
     Singular expressions used herein include plurals expressions unless they have definitely opposite meanings in the context. Accordingly, shapes, sizes, and the like of the elements in the drawing may be exaggerated for clearer description. 
     Terms, such as first and second, are used for describing various constituent elements, but the constituent elements are not limited by the terms. The terms are used only to discriminate one constituent element from another constituent element. For example, without departing from the scope of the invention, a first constituent element may be named as a second constituent element, and similarly a second constituent element may be named as a first constituent element. 
     It should be understood that when one constituent element referred to as being “coupled to” or “connected to” another constituent element, one constituent element can be directly coupled to or connected to the other constituent element, but intervening elements may also be present. In contrast, when one constituent element is “directly coupled to” or “directly connected to” another constituent element, it should be understood that there are no intervening element present. Other expressions describing the relationship between the constituent elements, such as “between ˜”, and “just between ˜” or “adjacent to ˜” and “directly adjacent to ˜” should be interpreted similarly. 
     All terms used herein including technical or scientific terms have the same meanings as meanings which are generally understood by those skilled in the art unless they are differently defined. Terms defined in generally used dictionary shall be construed that they have meanings matching those in the context of a related art, and shall not be construed in ideal or excessively formal meanings unless they are clearly defined in the present application. 
     The foregoing detailed description illustrates the present invention. Further, the above content illustrates and describes the exemplary embodiment of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, the foregoing content may be modified or corrected within the scope of the concept of the invention disclosed in the present specification, the scope equivalent to that of the disclosure, and/or the scope of the skill or knowledge in the art. The foregoing exemplary embodiment describes the best state for implementing the technical spirit of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Accordingly, the detailed description of the invention above is not intended to limit the invention to the disclosed exemplary embodiment. Further, the accompanying claims should be construed to include other exemplary embodiments as well. 
       FIGS.  1  and  2    are a perspective view and a front view illustrating a cutter apparatus for a double tube according to a first exemplary embodiment of the present invention. 
     Referring to  FIGS.  1  and  2   , the cutter apparatus  10  for the double tube may include a main body  100  that an operator can grip by hand, a protection member  200  connected to the main body  100 , and a cutter member  300 . 
     The protection member  200  is provided in a cylindrical shape. One end of the protection member  200  may be rotatably connected to the main body  100 . The other end of the protection member  200  is open, and provides a space into which an inner tube  22  of a double tube  20  is inserted. The protection member  200  may be rotated by a driving unit  110  installed on the main body  100 . The main body  100  may be provided with an operation button  120  for operating the driving unit  110 . 
     The cutter member  300  may include a blade  310  for cutting an outer tube  24 . The blade  310  may be installed on the protection member  200  so as to spread when the outer tube  24  is cut. 
       FIGS.  3 A and  3 B  are diagrams illustrating a process of cutting an outer cover by the cutter apparatus for the double tube according to the first exemplary embodiment. 
     As illustrated in  FIGS.  3 A and  3 B , when the operation button  120  is pressed while the double tube  20  is positioned so that the inner tube  22  is inserted into the protection member  200 , the protection member  200  is rotated. By the rotation of the protection member  200 , the blade  310  cuts the outer tube  24  while moving from a standby position to a cutting position by centrifugal force. For reference, the blade  310  is located in a mounting recess  210  of the protection member  200 , a slot  212  may be provided in the mounting recess  210  to allow the blade  310  to move forward in the cutting direction. A fixing pin  312  of the blade  310  is inserted into the slot  212 . When the cutting operation is completed and the operation of the driving unit  110  is stopped, the blade  310  is returned from the cutting position to the standby position by an elastic member  390 . 
       FIGS.  4  and  5    are a perspective view and a front view illustrating a cutter apparatus for a double tube according to a second exemplary embodiment of the present invention. 
     Referring to  FIGS.  4  and  5   , a cutter apparatus  10   a  for a double tube according to the present exemplary embodiment includes a main body  100   a,  a protection member  200   a,  and a cutter member  300   a,  which provide with a configuration and function substantially similar to the main body  100 , the protection member  200 , and the cutter member  300  illustrated in  FIGS.  1  and  2   , so that hereinafter, the second exemplary embodiment will be mainly described with the difference from the first exemplary embodiment. 
     In the present exemplary embodiment, the cutter apparatus  10   a  for the double tube may further include an outer cover  400 . The outer cover  400  may be installed on the main body to surround the protection member  200   a.  A space is provided between the outer cover  400  and the protection member  200   a,  and the outer tube  24  of a double tube  20  may be positioned in the space. The outer cover  400  may be provided in a cylindrical shape. The outer cover  400  may be provided transparently so that the operator can easily check the cutting operation of the outer tube  24 . 
       FIG.  6    is a modified example of the cutter apparatus for the double tube illustrated in  FIG.  4   . 
     As illustrated in  FIG.  6   , the outer cover  400  of the cutter apparatus  10   a  for the double tube has a scale  410  on the outer surface. The operator may check the cut length of the outer tube  24  by looking at the scale  410 . 
       FIG.  7    is a cross-sectional view illustrating a cutter apparatus for a double tube according to a third exemplary embodiment of the present invention. 
     Referring to  FIG.  7   , a cutter apparatus  10   b  for a double tube according to the present exemplary embodiment includes a main body  100   b,  a protection member  200   b,  and a cutter member  300   b,  which provide with a configuration and function substantially similar to the main body  100   a,  the protection member  200   a,  and the cutter member  300   a  illustrated in  FIGS.  4  and  5   , so that hereinafter, the third exemplary embodiment will be mainly described with the difference from the second exemplary embodiment. 
     In the exemplary embodiment, it is characterized in that the cutter apparatus  10   b  for the double tube further includes a tube fixing member  500  for fixing a double tube  20  before cutting an outer tube  24 . The cutter apparatus  10   b  for the double tube may cut the outer tube  24  by using the cutter member in a state in which the double tube  20  is fixed by the tube fixing member  500 . 
       FIGS.  8  and  9    are modified examples of a tube fixing member illustrated in FIG.  7 . 
     As illustrated in  FIGS.  8  and  9   , the tube fixing member  500  may be installed on the outer cover  400   b.  The tube fixing member  500  may include pressing pins  510  that pass through an outer cover  400   b  and pressurize the outer surface of the outer tube  24 . 
       FIGS.  10  and  11    are another modified example of the tube fixing member illustrated in  FIG.  7   . 
     As illustrated in  FIGS.  10  and  11   , the tube fixing member may be provided in the form of an expandable member  520  installed inside an inner cover  200   b.  The expandable member  520  may be inserted into the inner tube  22  to pressurize the inner surface of the inner tube  22  by an inflation operation. The expandable member  520  may expand during the cutting operation. For example, the expandable member  520  includes a shaft  524 , and a plurality of ribs  522  fixed to an end of the shaft  524  and including one end fixed to a lifting plate  526  movable on the shaft  524 . The ribs  522  are stretched close to a straight line when the lifting plate  5260  moves down, and when the lifting plate  526  moves up, the ribs  522  are inflated to be curved to the outside and come into contact with the inner surface of the inner tube  22 . 
       FIGS.  12  and  13    are cross-sectional views illustrating a cutter apparatus for a double tube according to a fourth exemplary embodiment of the present invention. 
     Referring to  FIGS.  12  and  13   , a cutter apparatus  10   c  for a double tube according to the present exemplary embodiment includes a main body  100   c,  a protection member  200   c,  and a cutter member  600 , which provide with a configuration and function substantially similar to the main body  100  and the protection member  200  illustrated in  FIGS.  1  and  2   , so that hereinafter, the fourth exemplary embodiment will be mainly described with the difference from the first exemplary embodiment. 
     In the present exemplary embodiment, the cutter member  600  of the cutter apparatus  10   c  for the double tube may be provided to the main body. The cover member  600  may include a support  620  that can be moved up and moved down by a telescopic method in which the support  620  may be stretched and reduced while overlapping parts, and a support ring  610  installed at the end of the support  620  and supporting the blade  612 . 
     The cutter member having the above structure may be rotated along the rotation radius of the double tube in the main body for cutting the outer tube  24 . Alternatively, the cutter member may be rotated manually while the operator holds the main body by hand to perform the cutting operation. 
       FIG.  14  to  15 B  are views illustrating another example of a cutter member in the cutter apparatus for the double tube. 
     As illustrated in  FIGS.  14  to  15     b,  a cutter member  700  includes blades  710  installed in a protection member  200   d.  The blade  710  may be pin-coupled to an insertion recess  280  of the protection member  200   d  to be spread by centrifugal force when the protection member  200   d  rotates. As illustrated in  FIG.  15 A , the blade  710  waits in a state of being inserted into the insertion recess  280  before the cutting operation, and as illustrated in  FIG.  15 B , the blade  710  is spread to a cutting position at which the blade  710  is capable of cutting the outer tube  24  by centrifugal force during the cutting operation. At this time, the blade  710  is rotatably coupled to the protection member  200   d  by the pin  712 , and when the cutting operation is completed and the operation of a driving unit (not illustrated) stops, the blade  710  is returned to the standby position from the cutting position by an elastic member  714 . 
     The foregoing detailed description illustrates the present invention. Further, the above content illustrates and describes the exemplary embodiment of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, the foregoing content may be modified or corrected within the scope of the concept of the invention disclosed in the present specification, the scope equivalent to that of the disclosure, and/or the scope of the skill or knowledge in the art. The foregoing exemplary embodiment describes the best state for implementing the technical spirit of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Accordingly, the detailed description of the invention above is not intended to limit the invention to the disclosed exemplary embodiment. Further, the accompanying claims should be construed to include other exemplary embodiments as well.