Patent Publication Number: US-2022211398-A1

Title: Wire feeding device

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of International Application No. PCT/JP2020/039718, filed Oct. 22, 2020, which claims priority to Japanese Patent Application No. 2019-192772, filed Oct. 23, 2019. The contents of these applications are incorporated herein by reference in their entirety. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to a wire feeding device that feeds a wire. 
     BACKGROUND 
     To remove an occluding object that blocks a blood vessel, such as a chronic total occlusion (CTO), and improve a blood flow, a test would be taken place. The test is for example regarding whether a soft guide wire can penetrate the occluding object, and, if the soft guide wire does not penetrate the occluding object, the guide wire is replaced gradually with a harder antegrade guide wire. 
     This method requires the effort to replace the guide wires and the cost to use a plurality of guide wires. 
     Further, to control the guide wire to penetrate an occluding object, a technician picks and operates a guide wire by hand. Thus, the guide wire feeding distance depends on the sense of the technician. 
     Meanwhile, the technique described in Japanese Patent Application Publication No. 2016-202711, for example, is known as a technique capable of feeding a medical wire with a given moving amount and preferably transmitting the pressing force of the medical wire. 
     SUMMARY 
     In the technique described in the Publication, the technician feeds a medical wire by pressing a spring. For this reason, the pressing force against the medical wire is relatively limited and may not be sufficient for the medical wire to penetrate an occluding object. Thus, the medical wire needs to be replaced to enable penetration through the occluding object. Therefore, it is not possible to solve the problems of requiring the effort to replace the medical wires and the cost to use a plurality of medical wires. 
     Moreover, the technique of the Publication , when the grip member holding a medical wire moves to the distal end side exceeding a given moving amount, the engagement between the engagement member and the grip member, which maintains the gripped state of the medical wire, is cancelled so as to prevent a moving amount of the medical wire from exceeding the given moving amount. However, the moving amount of the medical wire may vary depending on the timing when the engagement between the engagement member and the grip member is cancelled. 
     The present disclosure has been made on the basis of the above-described circumstances, and one or more embodiments of the present disclosure are to adjust a wire moving amount to an appropriate amount and feed the wire with appropriate force. 
     One or more embodiments provide a wire feeding device that feeds a wire in a distal end direction. The wire feeding device includes a grip portion that is able to grip the wire and move in the distal end direction, a hitting portion that is arranged on a proximal end side of the grip portion, and is movable in an axial direction of the wire and is able to come into contact with and separate from the grip portion, an elastic body that is able to energize the hitting portion toward the distal end direction, an energizing portion that deforms the elastic body and increases energizing force on the hitting portion toward the distal end direction, and a release portion that releases a deformed state of the elastic body with the energizing force increased by the energizing portion. In the wire feeding device, the wire gripped by the grip portion is fed toward the distal end direction by causing the hitting portion to hit the grip portion by the energizing force of the elastic body whose deformed state is released by the release portion and moving the grip portion toward the distal end direction. 
     In the above-described wire feeding device, the grip portion, the hitting portion, and the release portion may be configured to interlock with each other so that gripping the wire, moving the grip portion toward the distal end direction by a hit of the hitting portion with the grip portion, releasing the grip of the wire, and moving the grip portion toward the proximal end direction are performed in this order. 
     In the above-described wire feeding device, the grip portion may be movable in a given movable range in the axial direction, and may be configured to keep, when moved to a frontmost end position in the distal end direction in the movable range by a hit of the hitting portion, gripping the wire at the position. 
     The above-described wire feeding device may further include a release and moving portion that cancels the grip of the wire by the grip part at the frontmost end position, and moves the grip portion from the frontmost end position to a rearmost end position in the movable range while keeping a cancelled state of the grip of the wire by the grip portion. 
     The above-described wire feeding device may further include a power transmission mechanism that enables, with power supplied from a same power source, an operation of moving the grip portion from the frontmost end position to the rearmost end position by the release and moving portion and an operation of increasing energizing force of the elastic body by the energizing portion, as a sequence of operations. 
     In the above-described wire feeding device, the elastic body may be able to increase energizing force with the movement of the hitting portion toward the proximal end side, the energizing portion may include a hook engageable with a protruding portion of the hitting portion, and may be able to move the hitting portion toward the proximal end side while the hook is engaged with the protruding portion, and the release portion may release the deformed state of the elastic body by releasing the engagement between the hook of the energizing portion and the protruding portion of the hitting portion. 
     In the above-described wire feeding device, the grip portion may include facing grip surfaces that are capable of gripping the wire by sandwiching the wire, and the grip surface may include a surface intersecting the movable direction of the grip portion. 
     In the above-described wire feeding device, the grip portion may have arrangement space for arranging the wire to be gripped, and the arrangement space may be openable to an outside through an opening extending over the entire movable direction of the grip portion. 
     In the above-described wire feeding device, the grip portion may have arrangement space for arranging the wire to be gripped, and the arrangement space may be able to form a through hole extending in the movable direction of the grip portion. 
     In the above-described wire feeding device, the wire feeding device may further include a grip release portion at the time of stopping that cancels, when energization of the energizing force by the energizing portion is stopped, the grip of the wire by the grip portion while the grip portion does not move to the distal end direction. 
     In the above-described wire feeding device, the power source may be a power-operated motor. 
     In the above-described wire feeding device, the wire feeding device may further include a lever that is able to supply power to the power transmission mechanism by turning around a given axis in accordance with technician&#39;s operation. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a wire feeding device according to a first embodiment. 
         FIG. 2  is a sectional top view of the wire feeding device in an initial state. 
         FIG. 3  is a sectional side view of the wire feeding device in an initial state. 
         FIG. 4  is a configuration diagram of a grip portion of the wire feeding device. 
         FIG. 5  is a perspective view of the wire feeding device in a gripping preparation state. 
         FIG. 6  is a sectional side view of the wire feeding device in a gripping preparation state. 
         FIG. 7  is a perspective view of the wire feeding device in a compressed state. 
         FIG. 8  is a sectional top view of the wire feeding device in a compressed state. 
         FIG. 9  is a sectional side view of the wire feeding device in a compressed state. 
         FIG. 10  is a perspective view of the wire feeding device at the start of feeding. 
         FIG. 11  is a sectional side view of the wire feeding device in a state immediately before the start of feeding. 
         FIG. 12  is a sectional side view of the wire feeding device in a state immediately after the start of feeding. 
         FIG. 13  is a sectional side view of the wire feeding device in a state after the completion of feeding. 
         FIG. 14  is a configuration diagram of a grip portion according to a modification. 
         FIG. 15  is a diagram for explaining a guide wire and a catheter connected to a wire feeding device according to a second embodiment, and a connector for the connection to the wire feeding device. 
         FIG. 16  is a diagram illustrating a connection state between a guide wire and a catheter and a connector. 
         FIG. 17  is a perspective view of the wire feeding device. 
         FIG. 18  is a perspective view of the wire feeding device to which a guide wire and a catheter are connected. 
         FIG. 19  is a sectional top view of the wire feeding device in an initial state. 
         FIG. 20  is a configuration diagram of a grip portion of the wire feeding device. 
         FIG. 21  is an exploded perspective view of the wire feeding device. 
         FIG. 22  is a sectional top view of the wire feeding device in a gripping preparation state. 
         FIG. 23  is a sectional top view of the wire feeding device in a state immediately before the start of feeding. 
         FIG. 24  is a sectional top view of the wire feeding device in a state immediately after the start of feeding. 
         FIG. 25  is a bottom view of the wire feeding device in a state immediately after the start of feeding. 
         FIG. 26  is a sectional top view of the wire feeding device in a state after the completion of feeding. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, the wire feeding device according to embodiments will be described with reference to the drawings. However, the present disclosure is not limited to the embodiments illustrated in the drawings. 
     In this specification, the term “guide wire” indicates a medical guide wire that is pushed to a surgical site in a body cavity such as a blood vessel and is used to guide a catheter to the surgical site. 
     In this specification, the “distal end side” and the “distal end direction” indicate the side and direction, along the longitudinal direction of the guide wire (direction along the axial direction of the guide wire), where an occluding object to be penetrated by a guide wire is positioned. The “rear end side” and the “rear end direction” are opposite to the distal side and direction. Moreover, the “proximal end side” indicates a direction along the longitudinal direction of the guide wire, the direction being opposite to the distal end side. Moreover, the “distal end” indicates an end on the distal end side of an arbitrary member or region, and the “proximal end” indicates an end on the proximal end side of an arbitrary member or region. 
     First Embodiment 
       FIG. 1  is a perspective view of a wire feeding device according to the first embodiment.  FIG. 2  is a sectional top view of the wire feeding device in an initial state.  FIG. 3  is a sectional side view of the wire feeding device in an initial state. 
     A wire feeding device  1  is a device that feeds a guide wire GW as an example of a wire. The guide wire GW is pushed to a surgical site in a body cavity such as a blood vessel, for example, and is used to penetrate an occluding object in the surgical site. 
     The wire feeding device  1  includes a housing  5 , a grip portion  10 , a hammer  15 , a push spring  16 , a return spring  17 , a slider  20 , a grip release portion  23 , and a holding portion  24 . The hammer  15  is an example of a hitting portion. The push spring  16  is an example of an elastic body. The slider  20  is an example of an energizing portion. The slider  20  and the housing  5  are examples of a releasing portion. The wire feeding device  1  further includes a handle  31 , links  32  and  33 , and joints  34 ,  35 , and  36 . Here, the handle  31 , the link  32 , the link  33 , the joints  34 ,  35 , and  36 , and the slider  20  are examples of a power transmission mechanism. 
     The housing  5  has a substantially rectangular parallelepiped shape with the axial direction of the guide wire GW (X-axis direction in the drawing) when the guide wire GW is attached, being the longitudinal direction. The housing  5  has a through hole  5 A through which the guide wire GW is inserted. Further, the housing  5  includes a grip portion accommodating portion  5 B for accommodating the grip portion  10  movably in the X-axis direction and a slider accommodating portion  5 C for accommodating the slider  20  movably in the X-axis direction. Further, a protruding portion  5 D is formed on the upper part on the proximal end side of the slider accommodating portion  5 C. Further. on the X-axis direction side of the through hole  5 A of the housing  5 , an adapter  6  for connecting to an adapter on the proximal end side of a catheter is connected. 
     The grip portion  10  is movable in the X-axis direction in the grip portion accommodating portion  5 B. The grip portion  10  is able to grip the guide wire GW. 
       FIG. 4  is a configuration diagram of the grip portion  10  according to the first embodiment. 
     The grip portion  10  includes a first component  11 , a second component  12 , and grip springs  13 . The first component  11  includes, for example, a protruding portion  11 A extending in the X-axis direction and substantially columnar leg portions  11 B extending in the Y-axis direction. The second component  12  includes a concave portion  12 A extending in the X-axis direction and having a shape corresponding to the protruding portion  11 A of the first component, a protruding portion  12 B projecting in both directions of the Z-axis direction, and through hole portions  12 C with a through hole through which the leg portion  11 B can be inserted. 
     The first component  11  and the second component  12  are combined such that the protruding portion  11 A of the first component  11  is fitted in the concave portion  12 A of the second component  12  and the leg portions  11 B of the first component  11  are inserted in the through holes of the through hole portion  12 C of the second component  12 . The grip spring  13  is attached so that energizing force is generated between the leg portion  11 B of the first component  11  and the second component  12 . 
     With such a configuration, the energizing force of the grip spring  13  acts so that the surface on the second component  12  side of the protruding portion  11 A of the first component  11  and the surface on the first component  11  side of the concave portion  12 A of the second component  12  approach to each other. In the present embodiment, the guide wire GW is arranged between the surface on the second component  12  side of the protruding portion  11 A of the first component  11  and the surface on the first component  11  side of the concave portion  12 A of the second component  12 , which enables the grip portion  10  to grip the guide wire GW by the energizing force of the grip spring  13 . Note that when the leg portion  11 B of the first component  11  is pressed toward the first component  11  side (Y-axis direction side) and the grip spring  13  is compressed, the surface on the second component  12  side of the protruding portion  11 A of the first component  11  and the surface on the first component  11  side of the concave portion  12 A of the second component  12  are separated from each other, so that the grip portion  10  no longer grips the guide wire GW (grip release). 
     The protruding portion  12 B of the second component  12  engages with a concave portion extending in the X-axis direction on both wall portions in the Z-axis direction of the grip portion accommodating portion SB of the housing  5 , and acts to accurately guide the grip portion  10  in the X-axis direction. 
     Returning to the description using  FIGS. 1 to 3 , the hollow hammer  15  is arranged on the proximal end side in the X-axis direction of the grip portion  10  such that the longitudinal direction of the hammer  15  is the X-axis direction. The push spring  16  is arranged around a part on the proximal end side of the hammer  15  and on the proximal end side of the hammer  15  such that the longitudinal direction of the push spring  16  is the X-axis direction. 
     The hammer  15  is made of metal, for example, and is movable in the X-axis direction. The hammer  15  includes a protruding portion  15 A on the side of the slider accommodating portion  5 C. The protruding portion  15 A can be engaged with a hook  22  of the slider  20 , described in detail later. The push spring  16  is, for example, a metal spring, and is deformable (compressible) in the X-axis direction and capable of applying energizing force in the X-axis direction on the hammer  15 . 
     The return spring  17  is, for example, a metal spring, and is deformable (compressible) in the X-axis direction and energizes the grip portion  10  toward the proximal end side. The energizing force of the return spring  17  that is applied on the grip portion  10  is smaller than the energizing force of the push spring  16  in the initial state that is applied on the grip portion  10  (a state in which the compression is not generated by the movement of the hammer  15 ). Thus, when the push spring  16  is in the initial state, the grip portion  10  is positioned at the frontmost end position in the movable range (the frontmost end position in the X-axis direction in the grip portion accommodating portion  5 B). Meanwhile, when the push spring  16  is compressed so that no energizing force is applied on the grip portion  10 , the grip portion  10  is moved to the rearmost end position in the movable range (the rearmost end position in the X-axis direction in the grip portion accommodating portion  5 B) by the energizing force of the return spring  17 . 
     In the wire feeding device  1 , the handle  31 , the link  32 , the link  33 , the slider  20 , the joints  34 ,  35 , and  36 , and the grip release portion  23  form the power transmission mechanism. 
     The handle  31  is a handle for a technician using the wire feeding device  1  to manually perform a rotation operation. A first end of the handle  31  and a first end of the link  32  are connected through the joint  34  such that the rotational force is transmittable from the handle  31  to the link  32 . In the present embodiment, when the handle  31  is rotated once around the joint  34 , the link  32  is rotated once. 
     A second end of the link  32  and a first end of the link  33  are rotatably connected through the joint  35 . The length of the link  33  may be longer than that of the link  32 . A second end of the link  33 , the slider  20 , and the grip release portion  23  are rotatably connected through the joint  36 . 
     In this power transmission mechanism, when the handle  31  is rotated, the link  32  is rotated. With the rotation of the link  32 , the link  33  moves with the movement of the slider  20  and the grip release portion  23  in the X-axis direction. 
     The slider  20  includes the hook  22  that engages with the protruding portion  15 A of the hammer  15  and a torsion spring  21  that energizes the hook  22  in the Z-axis direction. 
     When the slider  20  moves from the frontmost end position toward the proximal end side in the X-axis direction within the moving range of the slider  20 , the hook  22  engages with the protruding portion  15 A of the hammer  15 . When the slider  20  further moves, the hammer  15  is moved to the proximal end side, so that the push spring  16  is compressed. When the slider  20  approaches the rearmost end position, the hook  22  (torsion spring  21 ) is pushed downward by the protruding portion  5 D of the housing  5 , thereby releasing the engagement between the hook  22  and the protruding portion  15 A of the hammer  15 . As a result, the deformed state (compressed state) of the push spring  16  is released, so that the push spring  16  pushes the hammer  15  in the X-axis direction. 
     The grip release portion  23  is a plate-shaped member in which the surface on the housing  5  side on the distal end side in the X-axis direction has an inclination smaller in thickness toward the distal end side. When the grip release portion  23  is moved to the distal end side in the X-axis direction, it enters between the holding portion  24  and the leg portion  11 B of the grip portion  10 , compresses the grip spring  13 , and moves the leg portion  11 B of the grip portion  10  toward the Y-axis positive direction. Thus, the surface on the second component  12  side of the protruding portion  11 A of the first component  11  and the surface on the first component  11  side of the concave portion  12 A of the second component  12  are separated from each other, thereby releasing the grip of the guide wire GW. 
     The following will specifically describe a use method of the wire feeding device  1  according to the embodiment and the operation of the wire feeding device  1  when used, with reference to the drawings. In the wire feeding device  1 , the grip portion  10 , the hammer  15 , and the slider  20  are configured to interlock with each other so that gripping the guide wire GW, moving the grip portion  10  toward the distal end direction of the guide wire GW, releasing the grip of the guide wire GW, and moving the grip portion  10  toward the rear end direction are performed in this order. Note that it is assumed that the wire feeding device  1  is initially in a state (initial state) not gripping the guide wire GW, as illustrated in  FIG. 1 . 
     Here,  FIG. 5  is a perspective view of the wire feeding device in a gripping preparation state, and  FIG. 6  is a sectional side view illustrating a gripping preparation state.  FIG. 7  is a perspective view of the wire feeding device in a compressed state.  FIG. 8  is a sectional top view illustrating a compressed state.  FIG. 9  is a sectional side view in a compressed state.  FIG. 10  is a perspective view illustrating a feeding start state of the wire feeding device.  FIG. 11  is a sectional side view illustrating a state immediately before the start of feeding.  FIG. 12  is a sectional side view illustrating a state immediately after the start of feeding.  FIG. 13  is a sectional side view of the wire feeding device in a state after the completion of feeding. 
     First, the guide wire GW is inserted into a blood vessel, and then the guide wire GW is pushed to an obstructed site along the blood vessel. Next, after the distal end of the guide wire GW reaches the obstructed site, a catheter is pushed to the obstructed site using the guide wire GW as a guide. Then, the proximal end side of the guide wire GW is inserted into the through hole  5 A of the housing  5 , and the adapter on the proximal end side of the catheter is connected to the adapter  6  of the wire feeding device  1 . 
     In this case, as illustrated in  FIG. 2 , the grip release portion  23  compresses the grip spring  13 , and the surface on the second component  12  side of the protruding portion  11 A of the first component  11  and the surface on the first component  11  side of the concave portion  12 A of the second component  12  are separated from each other, and the grip of the guide wire GW by the grip portion  10  is released. 
     Next, when the handle  31  is rotated from the state illustrated in  FIG. 1  to the state illustrated in  FIG. 5 , the slider  20  and the grip release portion  23  slide toward the proximal end side. Because the protruding portion  15 A of the hammer  15  is engaged with the hook  22  of the slider  20 , as illustrated in  FIG. 6 , the hammer  15  is moved toward the proximal end side with the movement of the slider  20 , so that the push spring  16  is compressed. 
     Here, the grip portion  10  is no longer pushed by the hammer  15 . Thus, as illustrated in  FIG. 6 , the grip portion  10  slides to the rearmost end in the movable range by the energizing force of the return spring  17 . In this manner, the grip portion  10  moves by a distance D from the frontmost end (initial position) to the rearmost end in the movable range. The distance D corresponds to a feeding amount per one time by the wire feeding device  1 . For example, when the feeding amount per one time by the wire feeding device  1  is 2 mm, the grip portion  10  slides to the rear end side by 2 mm from the initial position. At this time, the grip release portion  23  is configured to be at a position where the grip spring  13  of the grip portion  10  is compressed, which keeps the state where the grip portion  10  does not grip the guide wire GW. 
     Further, when the handle  31  is rotated from the state illustrated in  FIG. 5  to the state illustrated in  FIG. 7 , the slider  20  and the grip release portion  23  further slide toward the proximal end side. Because the hook  22  of the slider  20  remains engaged with the protruding portion  15 A of the hammer  15 , as illustrated in  FIG. 9 , the hammer  15  is moved toward the proximal end side with the movement of the slider  20 , so that the push spring  16  is further compressed. 
     Here, the grip release portion  23  deviates from the position where the grip spring  13  of the grip portion  10  is compressed, as illustrated in  FIG. 8 . Therefore, the guide wire GW between the surface on the second component  12  side of the protruding portion  11 A of the first component  11  and the surface on the first component  11  side of the concave portion  12 A of the second component  12  is gripped. 
     Further, when the handle  31  is rotated from the state illustrated in  FIG. 7  to the state illustrated in  FIG. 10 , the slider  20  and the grip release portion  23  further slide toward the proximal end side. As illustrated in  FIG. 11 , the hook  22  (torsion spring  21 ) of the slider  20  is pushed down by the protruding portion  5 D of the housing  5 , whereby the engaging state of the hook  22  with the protruding portion  15 A of the hammer  15  is released. 
     In this manner, as illustrated in  FIG. 12 , the energizing force of the push spring  16  is applied on the movement of the hammer  15  toward the distal end direction, so that the hammer  15  moves toward the distal end direction, and the distal end side of the hammer  15  hits the proximal end side of the grip portion  10 . 
     As a result, as illustrated in  FIG. 13 , the grip portion  10  gripping the guide wire GW moves toward the distal end direction by the impact of a hit with the hammer  15 , and stops at the frontmost end position of the grip portion  10 . Here, the grip portion  10  is not in contact with the grip release portion  23 , thereby keeping the state of gripping the guide wire GW. 
     Therefore, the grip portion  10  moves from the rearmost end position to the frontmost end position while keeping the state of gripping the guide wire GW. As a result, the guide wire GW is fed to the distal end side by the distance D from the rearmost end position to the frontmost end position of the grip portion  10 . 
     Thereafter, when the handle  31  is rotated from the state illustrated in  FIG. 10 , the slider  20  and the grip release portion  23  slide toward the distal end side. When the rotation amount of the handle  31  reaches one round from the start, the initial states as illustrated in  FIG. 1  is restored. Note that if it is necessary to further feed the guide wire GW, the handle  31  may be further rotated by a necessary circumference. 
     As described above, the wire feeding device  1  according to the present embodiment is able to feed the guide wire GW by only an appropriate amount by applying impact force due to the energizing force accumulated in the push spring  16  on the guide wire GW. In this manner, an impact force on the guide wire GW, which allows the guide wire GW to penetrate an occluding object may be applied more effectively. 
     Next, a grip portion according to a modification will be described.  FIG. 14  is a configuration diagram of the grip portion according to a modification.  FIG. 14  is a perspective view illustrating a state in which each grip portion according to a modification is cut on the X-Y plane along the line A-A in  FIG. 4 . The similar parts as those of the grip portion illustrated in  FIG. 4  are designated by the same reference signs. 
     In the grip portion  10  according to the first embodiment, the moving direction (X direction) of the grip portion  10  matches the direction of the guide wire GW sandwiched by the grip portion  10 . That is, the moving direction of the grip portion  10  matches the direction in which the guide wire GW is likely to slide against the grip portion  10 . Therefore, depending on the moving force of the grip portion  10  and the resistance force to the movement of the guide wire GW in a moving direction (for example, the resistance force caused by the hardness of an obstructed site in contact with the distal end of the guide wire GW), the guide wire GW may slide. Each modification is configured to prevent the guide wire GW from sliding in this manner. 
     A grip portion  41  illustrated in (A) of  FIG. 14  includes a first component  42  in place of the first component  11  of the grip portion  10 , and a second component  43  in place of the second component  12  of the grip portion  10 . 
     The first component  42  includes a protruding portion  42 A extending in the X-axis direction and the substantially columnar leg portion  11 B extending in the Y-axis direction. The protruding portion  42 A is formed such that the width in the Y-axis direction is short (low in height) in the middle part in the X-axis direction of the grip portion  41 . Therefore, a surface (grip surface)  42 B of the protruding portion  42 A that faces the second component  43  and sandwiches the guide wire GW together with the second component  43  is formed to be concave in the Y-axis direction, and has a surface intersecting the movable direction (X-axis direction) of the grip portion  41 . In the present embodiment, the end portion on the X-axis positive direction side (a direction of the arrow in the drawing) of the protruding portion  42 A and the end portion on the X-axis negative direction side thereof are positioned on a straight line parallel to the X axis. 
     Further, the second component  43  includes a concave portion  43 A having a shape corresponding to the protruding portion  42 A of the first component  42 , the protruding portion  12 B, and the through hole portion  12 C. 
     A surface (grip surface)  43 B of the concave portion  43 A that sandwiches the guide wire GW together with the first component  42  is formed to protrude in the Y-axis positive direction. In the present embodiment, the end portion on the X-axis positive direction side (a direction of the arrow in the drawing) of the concave portion  43 A and the end portion on the X-axis negative direction side thereof are positioned on a straight line parallel to the X axis. 
     With such a configuration, the moving direction (X-axis direction) of the grip portion  41  and the direction of the guide wire GW gripped by the grip portion  41  do not completely match. That is, there exists a part where the direction of the guide wire GW is different from the moving direction of the grip portion  41 . Thus, force of a component causing the grip portion  41  to directly push the guide wire GW is generated between the grip portion  41  and the guide wire GW. Therefore the guide wire GW may be prevented from sliding when the grip portion  41  grips and moves the guide wire GW. Further, in this example, the end portion on the X-axis positive direction side (a direction of the arrow in the drawing) of the protruding portion  42 A and the end portion on the X-axis negative direction side thereof are positioned on a straight line parallel to the X axis, and the end portion on the X-axis positive direction side (a direction of the arrow in the drawing) of the concave portion  43 A and the end portion on the X-axis negative direction side thereof are positioned on a straight line parallel to the X axis. Thus, the guide wire GW can be linearly arranged on the distal end side and the proximal end side of the grip portion  41 . This makes it easy to handle the guide wire GW in the wire feeding device  1 . 
     A grip portion  44  illustrated in (B) in  FIG. 14  includes a first component  45  in place of the first component  11  of the grip portion  10  and a second component  46  in place of the second component  12  of the grip portion  10 . 
     The first component  45  includes a protruding portion  45 A extending in the X-axis direction and the leg portion  11 B. The protruding portion  45 A is formed such that the width in the Y-axis direction is shorter toward the X-axis negative direction and specifically, the protruding portion  45 A has a substantially S-shape on the X-Y plane. Therefore, a surface (grip surface)  45 B of the protruding portion  45 A that faces the second component  46  and sandwiches the guide wire GW together with the second component  46 , has a surface intersecting the movable direction (X-axis direction) of the grip portion  44 . 
     Further, the second component  46  includes a concave portion  46 A having a shape corresponding to the protruding portion  45 A of the first component  45 , the protruding portion  12 B, and the through hole portion  12 C. 
     A surface (grip surface)  46 B of the concave portion  46 A that grips the guide wire GW together with the first component  45  is formed to be concave and to protrude in the Y-axis direction. 
     With such a configuration, the moving direction (X-axis direction) of the grip portion  44  and the direction of the guide wire GW gripped by the grip portion  44  do not completely match. That is, there exists a part where the direction of the guide wire GW is different from the moving direction of the grip portion  44 . As a result, force of a component causing the grip portion  44  to directly push the guide wire GW is generated between the grip portion  44  and the guide wire GW. Therefore, the guide wire GW may be prevented from sliding when the grip portion  44  grips and moves the guide wire GW. 
     A grip portion  47  illustrated in (C) of  FIG. 14  includes a first component  48  in place of the first component  11  of the grip portion  10  and a second component  49  in place of the second component  12  of the grip portion  10 . 
     The first component  48  includes a protruding portion  48 A extending in the X-axis direction and the leg portion  11 B. The protruding portion  48 A is formed to be curved such that the width in the Y-axis direction is longer toward the X-axis negative direction. Therefore, a surface (grip surface)  48 B of the protruding portion  48 A that faces the second component  49  and sandwiches the guide wire GW together with the second component  49 , has a surface intersecting the movable direction (X-axis direction) of the grip portion  47 . 
     Further, the second component  49  includes a concave portion  49 A having a shape corresponding to the protruding portion  48 A of the first component  48 , the protruding portion  12 B, and the through hole portion  12 C. 
     A surface (grip surface)  49 B of the concave portion  49 A that grips the guide wire GW together with the first component  48  is formed to be curved in the Y-axis negative direction toward the X-axis negative direction. 
     With such a configuration, the moving direction (X-axis direction) of the grip portion  47  and the direction of the guide wire GW gripped by the grip portion  47  do not completely match. That is, there exists a part where the direction of the guide wire GW is different from the moving direction of the grip portion  47 . As a result, force of a component causing the grip portion  47  to directly push the guide wire GW is generated between the grip portion  47  and the guide wire GW. Therefore, the guide wire GW may be prevented from sliding when the grip portion  47  grips and moves the guide wire GW. 
     Second Embodiment 
     A wire feeding device  51  according to the second embodiment is a device that feeds a guide wire GW as an example of the wire. The guide wire GW is pushed to a surgical site in a body cavity such as a blood vessel, for example, and is used to penetrate an obstructing object in the surgical site, for example. The wire feeding device  51  is used by connecting a catheter through which the guide wire GW is inserted to the device. 
     Before describing the details of the wire feeding device  51 , a guide wire and a catheter connected to the wire feeding device  51  will be described. 
       FIG. 15  is a diagram for explaining a guide wire and a catheter connected to a wire feeding device according to the second embodiment and a connector for the connection to the wire feeding device.  FIG. 16  is a diagram illustrating a connection state between the guide wire and the catheter and the connector. 
     The guide wire GW is inserted through a hollow catheter  101 . A catheter hub  102  for adjusting the direction of the catheter  101  is non-rotatably attached to a first end side of the catheter  101 . In the example of (A) of  FIG. 15 , the left side of the drawing is the inside of the patient&#39;s body (distal end side), and the right side of the drawing is the outside of the patient&#39;s body (proximal end side). 
     The catheter  101  is connected to a connector  110  as illustrated in  FIG. 16 , and is connected to the wire feeding device  51  through the connector  110 . As illustrated in (B) of  FIG. 15 , the connector  110  includes a dial portion  110 A, an attachment portion  110 C, and a rear end portion  110 D. The dial portion  110 A is a portion for a technician to operate the direction of the catheter  101  connected to the connector HO. The attachment portion  1100  is a portion formed in a cylindrical shape for the attachment to a connector connection portion  53  (see  FIG. 17 ) described later of the wire feeding device  51 . The length in the axial direction of the attachment portion  110 C is substantially the same as the width in the X-axis direction of connecting pieces  53 A and  53 B described later of the connector connection portion  53 . The rear end portion  110 D is formed in a disk shape having a diameter larger than that of the cylinder of the attachment portion  1100 . The rear end portion  110 D acts to position the connector  110  in the X-axis direction with respect to the connector connection portion  53 . 
     The connector  110  has a through hole  110 B extending in the longitudinal direction. The through hole  110 B is configured to engage with a rear end portion  102 A of the catheter hub  102 . When the rear end portion  102 A of the catheter hub  102  is engaged with the through hole  110 B of the connector  110 , the catheter hub  102  and the connector  110  can be integrally rotated. 
       FIG. 17  is a perspective view of the wire feeding device, and  FIG. 18  is a perspective view of the wire feeding device to which a guide wire and a catheter are connected. 
     The wire feeding device  51  includes a housing  52 , a lever  81 , the connector connection portion  53 , a guide wire accommodating portion  54 , and a grip portion  70 . 
     The housing  52  has a substantially rectangular parallelepiped shape with the axial direction of the guide wire GW (X-axial direction in the drawing) being the longitudinal direction when the guide wire GW is attached. The housing  52  includes therein various components described later for gripping and feeding the guide wire GW in addition to the grip portion  70 . The lever  81  is turnable around a lever rotation shaft  82  described later as a center of rotation, and is a portion operated by a technician to feed the guide wire GW. In the present embodiment, the technician can feed the guide wire GW by gripping the lever  81  and the housing  52  with one hand. 
     The connector connection portion  53  is a portion for connecting the attachment portion  110 C of the connector  110 , and includes a pair of connecting pieces  53 A and  53 B extending in the X-axis direction. The connection pieces  53 A and  53 B are formed of, for example, elastic bodies such as resin, and sandwich the outer peripheral surface of the attachment portion  110 C of the connector  110  from both sides in the Y-axis direction to rotatably connect the connector  110 . The guide wire accommodating portion  54  is a portion for accommodating the guide wire GW to be fed, and is formed in a concave shape extending in the X-axis direction and being open in the Z-axis positive direction over the entire X-axis direction. The grip portion  70  is a portion that can grip the guide wire GW and can move the guide wire GW in the X-axis direction, and is arranged in the middle part in the X-axis direction of the guide wire accommodating portion  54  such that grip surface portions  71 A and  72 A described later are open to the outside. In the present embodiment, when the guide wire GW is placed on the surface in the Z-axis negative direction of the guide wire accommodating portion  54  (also referred to here as a bottom surface), the guide wire GW is arranged in space (arrangement space) between the grip surfaces holding the guide wire GW that are the surface portion  71 A and the gripping surface portion  72 A of the grip portion  70 . 
     To connect the catheter  101  and the guide wire GW to the wire feeding device  51 , the guide wire GW at a part on the more proximal end side than the connector  110  is placed on the bottom surface of the concave portion of the guide wire accommodating portion  54 , and then the attachment portion  110 C of the connector  110  connected to the catheter  101  of the guide wire GW is fitted between the connection pieces  53 A and  53 B of the connector connection portion  53  for attachment.  FIG. 18  illustrates the state in which the catheter  101  and the guide wire GW are connected to the wire feeding device  51  in this manner. In the state where the catheter  101  and the guide wire GW are connected to the wire feeding device  51  in this manner, the direction of the catheter  101  can be easily adjusted by the technician rotating the operation dial  110 A of the connector  110 . Further, in this state, a gap is secured between the surface on the X-axis negative direction side (a direction opposite to the direction of the arrow on the X axis) of the rear end portion  110 D of the connector  110  and the surface on the X-axis positive direction side of the housing  52 . Thus, liquid such as blood and chemicals that have passed through the catheter  101  easily flow down from the gap, which prevents the components of the housing  52  from coming into contact with the liquid. Further, when the lever  81  is not operated, the guide wire GW is not gripped as described later. Thus, the direction of the guide wire GW may be adjusted by turning the guide wire GW. 
     Next, the wire feeding device  51  will be described in detail.  FIG. 19  is a sectional top view of the wire feeding device in an initial state.  FIG. 20  is a configuration diagram of a grip portion of the wire feeding device.  FIG. 21  is an exploded perspective view of the wire feeding device.  FIG. 21  illustrates a state in which a partial housing  52 D on the Z-axis negative direction side is removed from the wire feeding device  51 . 
     As illustrated in  FIG. 19 , the wire feeding device  51  includes the housing  52 , the grip portion  70 , a hammer  61 , a push spring  62 , a return spring  66  (see  FIG. 22 ), a slider  63 , a grip release drive portion  64 , and a grip release portion  65 . The hammer  61  is an example of a hitting portion. The push spring  62  is an example of an elastic body. The slider  63  is an example of an energizing portion. The slider  63  and the housing  52  are examples of a releasing portion. The grip release drive portion  64  and the grip release portion  65  are examples of a grip release portion at the time of stopping. As illustrated in  FIG. 21 , the wire feeding device  51  further includes the lever  81 , links  85  and  87 , and joints  84 ,  86 , and  88 , and a slider  89 . Here, the lever  81 , the links  85  and  87 , the joints  84 ,  86 , and  88 , and the slider  89  are examples of a power transmission mechanism. 
     The housing  52  has a substantially rectangular parallelepiped shape with the axial direction of the guide wire GW (X-axial direction in the drawing) being longitudinal when the guide wire GW attached. Further, the housing  52  includes a grip portion accommodating portion  52 A for accommodating the grip portion  70  movably in the X-axis direction and a slider accommodating portion  52 B for accommodating the slider  63  movably in the X-axis direction. Further, a protruding portion  52 C is formed on the upper part on the proximal end side of the slider accommodating portion  52 B. 
     The grip portion  70  is movable in the X-axis direction in the grip portion accommodating portion  52 A. The grip portion  70  is able to grip the guide wire GW. 
     As illustrated in  FIG. 20 , the grip portion  70  includes a first component  71 , a second component  72 , and a grip spring  73 . The first component  71  includes, for example, the grip surface portion  71 A extending in the X-axis direction and a substantially columnar leg portion  71 B extending in the Y-axis direction. The second component  72  is formed to extend in the X-axis direction and includes the grip surface portion  72 A having a surface facing the grip surface portion  71 A of the first component  71 , a concave portion  72 B recessed in both directions in the Z-axis direction, and a through hole portion  72 C with a through hole through which the leg portion  71 B can be inserted. 
     The first component  71  and the second component  72  are combined such that the leg portion  71 B of the first component  71  is inserted in the through hole of the through hole portion  72 C of the second component  72 . The grip spring  73  is attached so that energizing force is generated between the leg portion  71 B of the first component  71  and the second component  72 . 
     With such a configuration, the energizing force of the grip spring  73  acts so that the surface (grip surface) on the second component  72  side of the grip surface portion  71 A of the first component  71  and the surface (grip surface) on the first component  71  side of the grip surface portion  72 A of the second component  72  approach to each other. In the present embodiment, space (arrangement space) is secured between the grip surface on the second component  72  side of the grip surface portion  71 A of the first component  71  and the grip surface on the first component  71  side of the grip surface portion  72 A of the second component  72 , whereby the guide wire GW can be arranged in the space, and the grip portion  70  is able to grip the guide wire GW by the energizing force of the grip spring  73 . This arrangement space can be opened to the outside by an opening extending over the entire movable direction of the grip portion  70 . In this embodiment, the guide wire GW is placed on the concave portion of the guide wire accommodating portion  54 , whereby the guide wire GW may be positioned substantially in the middle in the Z-axis direction of the grip surface of the grip surface portion  71 A of the first component  71  and the grip surface of the grip surface portion  72 A of the second component  72 . Meanwhile, when the leg portion  71 B of the first component  71  is pressed toward the first component  71  side (Y-axis negative direction side) and the grip spring  73  is compressed, the grip surface of the grip surface portion  71 A of the first component  71  and the grip surface of the grip surface portion  72 A of the second component  72  are separated from each other, and space is generated therebetween. As a result, the grip portion  70  no longer grips the guide wire GW (grip release). 
     The concave portion  72 B of the second component  72  engages with a protruding portion (not illustrated) extending in the X-axis direction on both wall portions in the Z-axis direction of the grip portion accommodating portion  52 A of the housing  52 , and acts to accurately guide the grip portion  70  in the X-axis direction. 
     As illustrated in  FIG. 19 , the hollow hammer  61  is arranged on the proximal end side in the X-axis direction of the grip portion  70  such that the longitudinal direction of the hammer  61  is the X-axis direction. The push spring  62  is arranged around a part on the proximal end side of the hammer  61  and on the proximal end side of the hammer  61  such that the longitudinal direction of the push spring  62  is the X-axis direction. 
     The hammer  61  is made of metal, for example, and is movable in the X-axis direction. The hammer  61  includes a protruding portion  61 A on the side of the slider accommodating portion  52 B. The protruding portion  61 A can be engaged with a hook  63 A described later of the slider  63 . The push spring  62  is, for example, a metal spring, and is deformable (compressible) in the X-axis direction and capable of applying energizing force in the X-axis direction on the hammer  61 . 
     The return spring  66  is, for example, a metal spring, and is deformable (compressible) in the X-axis direction and energizes the grip portion  70  toward the proximal end side. The energizing force of the return spring  66  that is applied on the grip portion  70  is smaller than the energizing force of the push spring  62  in the initial state that is applied on grip portion  70  (a state in which the compression is not generated by the movement of the hammer  61 ). In this manner, when the push spring  62  is in the initial state, the grip portion  70  is positioned at the frontmost end position in the movable range (the frontmost end position in the X-axis direction in the grip portion accommodating portion  52 A). Meanwhile, when the push spring  62  is compressed so that no energizing force is applied on the grip portion  70 , the grip portion  70  is moved to the rearmost end position in the movable range (the rearmost end position in the X-axis direction in the grip portion accommodating portion  52 A) by the energizing force of the return spring  66 . 
     In the wire feeding device  51 , the lever  81 , the links  85  and  87 , the joints  84 ,  86 , and  88 , the slider  89 , the slider  63 , the grip release drive portion  64 , and the grip release portion  65  form the power transmission mechanism. 
     The lever  81  is a portion for a technician using the wire feeding device  51  to manually perform a turning operation. The lever  81  is turnable around the lever rotation shaft  82 . The lever  81  is energized by a torsion spring  83  so that the angle formed with the housing  52  is larger. As illustrated in  FIG. 21 , the lever rotation shaft  82  of the lever  81  and a first end of the link  85  are connected through the joint  84  such that the turning force is transmittable from the lever  81  to the link  85 . In the present embodiment, the link  85  is configured to turn integrally with the turn of the lever  81 . 
     A second end of the link  85  and a first end of the link  87  are rotatably connected through the joint  86 . A second end of the link  87  and the slider  89  are rotatably connected through the joint  88 . The slider  63  and the grip release portion  65  are connected to the Z-axis positive direction side of the slider  89 . The slider  63  and the grip release portion  65  can move linearly in the X-axis direction integrally with the slider  89 . 
     In this power transmission mechanism, when the lever  81  is turned in an R 1  direction, the link  85  is turned in an R 2  direction. With the turn of the link  85 , the link  87  moves with the movement of the slider  89  along the X-axis direction. In the present embodiment, the turn angle of the lever  81 , the lengths of the links  85  and  87 , and the like of this power transmission mechanism are adjusted such that in a turnable range of the lever  81 , the slider  63  connected to the slider  89  can move in the entire moving range in the X-axis direction. 
     As illustrated in  FIG. 19 , the slider  63  has an inverted C-shaped shape on the X-Y plane and includes, at a portion on the Y-axis negative direction side, a hook  63 A engageable with the protruding portion  61 A of the hammer  61  and an inclined portion  63 B with an inclined surface gently inclined on the Y-axis negative direction side. When the slider  63  moves to the X-axis negative direction side and comes into contact with the protruding portion  52 C of the housing  52 , the inclined portion  63 B acts to deform the portion on the Y-axis negative direction side of the slider  63  in the Y-axis positive direction. 
     When the slider  63  moves from the frontmost end position to the proximal end side in the X-axis direction in the moving range of the slider  63 , the hook  63 A engages with the protruding portion  61 A of the hammer  61 . When the slider  63  further moves, the hammer  61  is moved to the proximal end side, so that the push spring  62  is compressed. When the slider  63  approaches the rearmost end position, the protruding portion  52 C of the housing  52  pushes up the inclined portion  63 B of the slider  63  in the Y-axis positive direction side, and the portion on the Y-axis negative direction side of the slider  63  is deformed in the Y-axis positive direction, so that the engagement between the hook  63 A and the protruding portion  61 A of the hammer  61  is released. As a result, the deformed state (compressed state) of the push spring  62  is released at once, and the push spring  62  pushes the hammer  61  in the X-axis direction. 
     The grip release portion  65  is a plate-shaped member in which the surface on the housing  52  side on the distal end side in the X-axis direction is thinner toward the distal end side. When the distal end portion of the grip release portion  65  is moved to the distal end side in the X-axis direction, the grip release portion  65  pushes a protruding portion  64 A of the grip release drive portion  64  downward. 
     The grip release drive portion  64  is formed of, for example, an elastic member, is a rod-shaped member extending in the X-axis direction, and includes, at the distal end, the protruding portion  64 A projecting to the Y-axis negative direction side. The protruding portion  64 A is arranged on the Y-axis positive direction side with respect to the leg portion  71 B of the grip portion  70 . The distal end portion of the grip release drive portion  64  is energized to bend in the Y-axis positive direction side. When the distal end portion is not pushed on the Y-axis positive direction side by the grip release portion  65 , the protruding portion  64 A is not in contact with the leg portion  71 B and does not press the leg portion  71 B (see  FIG. 23 ), while when the distal end portion is pushed on the Y-axis positive direction side by the grip release portion  65 , the protruding portion  64 A presses the leg portion  71 B of the grip portion  70  in the Y-axis negative direction. In this case, the grip spring  73  of the grip portion  70  is compressed to move the leg portion  71 B of the grip portion  70  in the Y-axis negative direction. As a result, the surface on the second component  72  side of the grip surface portion  71 A of the first component  71  and the surface on the first component  71  side of the grip surface portion  72 A of the second component  72  are separated from each other, thereby releasing the grip of the guide wire GW. 
     The following will specifically describe a use method of the wire feeding device  51  according to the second embodiment and the operation of the wire feeding device  51  when used, with reference to the drawings. In the wire feeding device  51 , the grip portion  70 , the hammer  61 , and the slider  63  are configured to interlock with each other so that gripping the guide wire GW, moving the grip portion  70  toward the distal end direction of the guide wire GW, releasing the grip of the guide wire GW, and moving the grip portion  70  toward the rear end direction are performed in this order. 
       FIG. 22  is a sectional top view of the wire feeding device in a gripping preparation state.  FIG. 23  is a sectional top view of the wire feeding device in a state immediately before the start of feeding.  FIG. 24  is a sectional top view of the wire feeding device in a state immediately after the start of feeding.  FIG. 25  is a bottom view of the wire feeding device in a state immediately after the start of feeding.  FIG. 26  is a sectional top view of the wire feeding device in a state after the completion of feeding. 
     First, the guide wire GW is inserted into a blood vessel, and then the guide wire GW is pushed to an obstructed site along the blood vessel. Next, after the distal end of the guide wire GW reaches the obstructed site, a catheter  101  is pushed to an obstructed site using the guide wire GW as a guide. Then, the proximal end side of the guide wire GW is accommodated in the guide wire accommodating portion  54  of the housing  52  from the Z-axis positive direction side, and the connector  110  is connected to the catheter hub  102  of the catheter  101 . Then, the connector  110  is pushed into the connector connection portion  53  from the Z-axis positive direction to connect the connector  110  to the wire feeding device  51 . 
     In this case, as illustrated in  FIG. 19 , the grip release portion  65  pushes the grip release drive portion  64 , and the grip spring  73  is compressed. Thus, the surface on the second component  72  side of the grip surface portion  71 A of the first component  71  and the surface on the first component  71  side of the grip surface portion  72 A of the second component  72  are separated from each other, and arrangement space is formed therebetween, and the grip of the guide wire GW by the grip portion  70  is released. Therefore, as described above, the catheter  101  with the guide wire GW inserted therethrough is attached to the wire feeding device  51 , whereby the guide wire GW can be easily accommodated in the arrangement space. This can reduce the preparation time for feeding the guide wire GW by the wire feeding device  51 , and reduces loads on the patient and the technician. 
     Next, when the lever  81  is turned slightly by gripping the lever  81  and the housing  52 , the slider  63  and the grip release portion  65  slide toward the proximal end side. Because the protruding portion  61 A of the hammer  61  is engaged with the hook  63 A of the slider  63 , as illustrated in  FIG. 22 , the hammer  61  is moved toward the proximal end side with the movement of the slider  63 , so that the push spring  62  is compressed. 
     Here, the grip portion  70  is no longer pushed toward the X-axis positive direction by the hammer  61 . Thus, the grip portion  70  slides to the rearmost end in the movable range by the energizing force of the return spring  66 . As a result, the grip portion  70  moves by a distance D from the frontmost end (initial position) to the rearmost end in the movable range. The distance D corresponds to a feeding amount per time by the wire feeding device  51 . For example, when the feeding amount per time by the wire feeding device  51  is 2 mm, the grip portion  70  slides to the rear end side by 2 mm from the initial position. Here, the grip release portion  65  is configured to be at a position where the grip spring  73  of the grip portion  70  is compressed through the grip release drive portion  64 , which keeps the state in which the grip portion  70  does not grip the guide wire GW. 
     Further, when the lever  81  is turned by further gripping the lever  81 , the slider  63  and the grip release portion  65  further slide toward the proximal end side. Because the hook  63 A of the slider  63  remains engaged with the protruding portion  61 A of the hammer  61 , as illustrated in  FIG. 23 , the hammer  61  is moved toward the proximal end side with the movement of the slider  63 , so that the push spring  62  is further compressed. 
     Here, the grip release portion  65  deviates from the position where the distal end portion of the grip release drive portion  64  is pushed. Thus, the grip release drive portion  64  is no longer in contact with the leg portion  71 B and no longer compresses the grip spring  73 , and the guide wire GW between the surface on the second component  72  side of the grip surface portion  71 A of the first component  71  and the surface on the first component  71  side of the grip surface portion  72 A of the second component  72  is gripped. 
     Further, as illustrated in  FIG. 25 , when the lever  81  is turned to the position (feeding position) where the slider  89  (the same applies to the slider  63 ) is at the most proximal end side of the moving range, the slider  63  and the grip release portion  65  further slide to the proximal end side. Then, as illustrated in  FIG. 24 , the inclined portion  63 B of the slider  63  is pushed up by the protruding portion  52 C of the housing  52 , and the portion on the Y-axis negative direction side of the slider  63  is bent to the positive direction side. As a result, the engaging state of the hook  63 A of the slider  63  with the protruding portion  61 A of the hammer  61  is released. 
     In this manner, as illustrated in  FIG. 26 , the energizing force of the push spring  62  is applied at once to the movement of the hammer  61  toward the distal end direction, so that the hammer  61  moves toward the distal end direction, and the distal end side of the hammer  61  hits the proximal end side of the grip portion  70 . 
     As a result, the grip portion  70  gripping the guide wire GW moves toward the distal end direction by the impact due to a hit with the hammer  61 , and stops at the frontmost end position of the grip portion  70 . Here, the grip release portion  65  is not in contact with the grip release drive portion  64  and, as a result, the grip release drive portion  64  is not in contact with the grip portion  70 . Thus, the guide wire GW remains gripped. 
     Therefore, the grip portion  70  moves from the rearmost end position to the frontmost end position while keeping the state of gripping the guide wire GW. As a result, the guide wire GW is fed to the distal end side by the distance D from the rearmost end position to the frontmost end position of the grip portion  70 . 
     Thereafter, when the technician stops gripping the lever  81 , the lever  81  is turned in the opposite direction by the torsion spring  83  to restore the initial state illustrated in  FIG. 21 . With this, the slider  63  and the grip release portion  65  slide toward the distal end side to restore the initial state illustrated in  FIG. 19 . Note that if it is necessary to further feed the guide wire GW, the lever  81  may be further turned by gripping the lever  81 . 
     As described above, in the wire feeding device  51  according to the present embodiment, the guide wire GW may be fed by only an appropriate amount by applying impact force due to the energizing force accumulated in the push spring  62  on the guide wire GW. In this manner, an impact force on the guide wire GW, which allows the guide wire GW to penetrate an occluding object, may be more effectively applied. 
     The following will describe an operation of the wire feeding device  51  when the lever  81  is gripped so that the grip portion  70  grips the guide wire GW, as illustrated in  FIG. 23 , and then the feeding of the guide wire GW is cancelled. 
     In the state illustrated in  FIG. 23 , when gripping the lever  81  is stopped, the torsion spring  83  causes the lever  81  to turn in the opposite direction. In this case, with the opposite direction of the lever  81 , the slider  89 , the slider  63 , and the grip release portion  65  slide toward the distal end side. Here, the slider  89 , the slider  63 , and the grip release portion  65  slide toward the distal end side while keeping the engaging state of the hook  63 A of the slider  63  with the protruding portion  61 A of the hammer  61 . 
     In this case, as illustrated in  FIG. 22 , the grip release portion  65  pushes the protruding portion  64 A of the grip release drive portion  64  in the Y-axis negative direction before the hammer  61  hits the proximal end side of the grip portion  70 . As a result, the grip spring  73  is compressed, so that the grip portion  70  does not grip the guide wire GW. Therefore, when the hammer  61  comes into contact with the proximal end side of the grip portion  70  and moves the grip portion  70  to the position illustrated in  FIG. 19 , the guide wire GW is not fed to the distal end side. 
     As described above, in the wire feeding device  51  according to the present embodiment, even when the lever  81  is gripped so that the guide wire GW is gripped once, if the lever  81  is not moved to the guide wire GW feeding position, the initial state can be restored without feeding the guide wire GW to the distal end side by stopping gripping the lever  81 . Therefore, even after the lever  81  is gripped once to some extent, the grip of the guide wire GW can be released, thereby allowing the change or the like of the directions of the catheter  101  and the guide wire GW. In this manner, an appropriate procedure in accordance with situations may be performed, and loads on the patient and the technician may be reduced. 
     The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified in various forms without departing from the gist thereof. For example, the following modifications are also possible. 
     In the above-described embodiments, metal springs are used as the push springs  16  and  62 . However, other kinds of elastic bodies such as rubber cords and plate springs may be used. The material of the elastic body may be a resin material. In the above-described embodiment, the hammers  15  and  61  are also made of metal. However, they may be made of a resin material, similarly to the push springs. 
     In the above-described embodiments, the hammers  15  and  61  are moved to compress the push springs  16  and  62 , thereby increasing the energizing force on the hammers  15  and  61  toward the distal end direction. However, an elastic body may be provided to extend with the movement of the hammers  15 ,  61  toward the proximal end side, so that the energizing force is increased by the extension of the elastic body, for example. 
     In the above-described embodiments, a mechanism for adjusting the movable range of the grip portions  10  and  70  in the X-axis direction, such as a mechanism for moving the position in the X-axis direction of the wall that determines the movable range, for example, may be provided. In this manner, easily and appropriately adjusting of the wire feeding amount by the wire feeding device may be realized. 
     In the above-described embodiment, a mechanism for adjusting the compression amount of the push springs  16  and  62  in the initial state, such as a mechanism for moving the position of the wall on the proximal end side of the push springs  16  and  62 , for example, may be provided. In this manner, easily and appropriately adjusting of the impact force applied on the grip portions  10  and  70  by the hammers  15  and  61  of the wire feeding device may be realized. 
     In the above-described embodiment, the technician manually rotates (turns) the handle  31  (or lever  81 ) to feed the guide wire GW. However, a power-operated motor may be used to feed the guide wire GW. For example, the link  32  (or the link  85 ) may be rotated (turned) by the power of a motor. In this case, the motor may be stopped when the link  32  is rotated once, or the motor may be stopped when the link  85  is turned by a predetermined angle. For example, a switch for driving the motor may be provided, so that when this switch is pressed once, the motor may be driven to rotate the link  32  once or turn it by a predetermined angle. Thus, a power source may be manual or may be an electric motor. 
     Note that the present disclosure is not limited to the configurations of the above-described embodiments, but is defined by the terms of the claims and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims Example embodiments have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, as would be apparent to one of skill in the art as of the filing of the present application, features, characteristics, and/or elements described in connection with a particular embodiment may be used singly or in combination with features, characteristics, and/or elements described in connection with other embodiments unless otherwise indicated. Accordingly, various changes in form and details may be made without departing from the spirit and scope of the embodiments set forth in the claims.