Patent Publication Number: US-11654539-B2

Title: Driving tool

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is the U.S. National Phase under 35 US.C. § 371 of International Application No. PCT/JP2019/017900, filed on Apr. 26, 2019, which claims the benefit of Japanese Application No. 2018-095939, filed on May 18, 2018, the entire contents of each are hereby incorporated by reference. 
     TECHNICAL FIELD 
     The present invention relates to a driving tool that strikes a fastener by using a driver blade. 
     BACKGROUND ART 
     Among driving tools each of which moves a driver blade and strikes a fastener by using the driver blade, pneumatic-type driving tools have been known, the pneumatic-type driving tool driving the driver blade for shot by further compressing air of a pressure chamber in a main body due to the movement of the driver blade and releasing the compressed air. 
     A configuration of the pneumatic-type driving tool as described above is disclosed in, for example, a Patent Document 1, and the Patent Document 1 discloses a driving tool in which a load on a convex portion of the driver blade is reduced. 
     RELATED ART DOCUMENT 
     Patent Document 
     Patent Document 1: Japanese Patent Application Laid-Open Publication No. 2018-34258 
     SUMMARY OF THE INVENTION 
     Problems to be Solved by the Invention 
     In the pneumatic-type driving tool, the compressed air filling the pressure chamber is sealed by a highly airtight sealing structure, and the pneumatic-type driving tool includes: a cylindrical cylinder at one end of the pressure chamber; and a driver blade capable of storing compressed energy by sliding inside this cylindrical cylinder in an axial direction. And, when the compressed energy is released, the fastener is driven (tucked) by the driver blade. 
     At the driving, a head of a nail that is loaded in an injection path at an end of the driver blade is driven into a wood piece or others while being pushed. At this time, in the driving tool, generally, there is a case of occurrence of nail jamming in which the nail is jammed in an injection port. The larger a driving energy is, the larger a necessary power for solving the nail jamming is, and therefore, a lot of time and effort for solving the nail jamming are needed so often. Further, in the pneumatic-type driving tool, the driver blade is urged by the internal compressed air even in the nail jamming, and therefore, the time and effort for solving the nail jamming tends to increase. 
     At the time of the nail jamming, the nail is jammed in a gap between a side wall of the driver blade and a side wall of a concave portion of a blade guide that guides the driver blade, and the driver blade does not move, either. Therefore, there is an issue of difficulty in solving the nail jamming. 
     A purpose of the present invention is to easily solve the nail jamming in the driving tool. 
     Means for Solving the Problems 
     A driving tool of the present invention includes: a striking driver configured to drive a driver blade that strikes a fastener; a main body having the striking driver; a first blade guide fixed to the main body; and a second blade guide attached to the first blade guide and configured to form an injection path for the fastener together with the first blade guide. And, the driver blade is arranged so as to go through a space made of two opposite side walls of the injection path, a bottom wall and a top wall, and either one of the two side walls is separated from the injection path. 
     Effects of the Invention 
     According to the present invention, the nail jamming in the driving tool can be easily solved. 
    
    
     
       BRIEF DESCRIPTIONS OF THE DRAWINGS 
         FIG.  1    is a side view showing a partially-cut internal structure of a driving tool of a first embodiment of the present invention; 
         FIG.  2    is a back view showing an outer appearance structure of a back side of the driving tool shown in  FIG.  1   ; 
         FIG.  3    is a side view showing an outer appearance structure of a lateral side of the driving tool shown in  FIG.  1   ; 
         FIG.  4    is a partially-enlarged plan view showing a reeling structure of the driver blade of the driving tool shown in  FIG.  1   ; 
         FIG.  5    is a partial cross-sectional view showing a blade-guide attaching structure of the driving tool shown in  FIG.  1   ; 
         FIG.  6    is a partial cross-sectional view showing the structure shown in  FIG.  5   , obtained after separation of the blade guide; 
         FIG.  7    is a partial cross-sectional view showing a blade-guide attaching structure of a driving tool of a second embodiment of the present invention; 
         FIG.  8    is a partial cross-sectional view showing the structure shown in  FIG.  7   , obtained after separation of the blade guide; 
         FIG.  9    is a partial cross-sectional view showing a blade-guide attaching structure of a driving tool of a third embodiment of the present invention; 
         FIG.  10    is a partial cross-sectional view showing the structure shown in  FIG.  9   , obtained after separation of the blade guide; 
         FIG.  11    is a partial cross-sectional view showing a blade-guide attaching structure of a driving tool of a fourth embodiment of the present invention; and 
         FIG.  12    is a partial cross-sectional view showing the structure shown in  FIG.  11   , obtained after separation of the blade guide. 
     
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     First Embodiment 
     Hereinafter, one example of embodiments of the present invention will be explained in detail with reference to the drawings. A driving tool  10  according to the present first embodiment shown in  FIGS.  1  to  3    is of the pneumatic type, and is configured so as to drive a fastener in by using a driver blade  21  configuring a striker  22 . 
     A structure of the driving tool  10  is explained to have: a cylindrical cylinder housing  11 ; a handle  12  that is continuously formed to the cylinder housing  11 ; and a nose portion  13  fixed to the cylinder housing  11 . Further, a cylinder  15 , a holder  16  and a pressure accumulator  17  are formed inside the cylinder housing  11 , and a piston  18  is arranged so as to be reciprocable inside the cylinder  15 . The nose portion  13  is a component forming an injection path  40  that is a path in which the fastener that is driven in by a driver blade  21  goes. 
     The driving tool  10  further has: a pressure chamber (striking driver)  19  configured to drive the driver blade  21  that strikes the fastener; and a main body  14  with the pressure chamber  19  including the cylinder housing  11 . In other words, in the main body  14  of the driving tool  10 , the pressure chamber  19  is formed as the striking driver. A sealing member  20  is attached to an outer circumferential surface of the piston  18 , and the sealing member  20  is in contact with an inner circumferential surface of the cylinder  15  to form a sealing surface. The sealing member  20  seals the pressure chamber  19 . Gas in a compressed state is encapsulated in the pressure chamber  19 . The gas encapsulated in the pressure chamber  19  is air, inert gas or others, and, for example, nitrogen gas or rare gas can be also encapsulated therein. In the present first embodiment, an example of the encapsulation of the air in the pressure chamber  19  will be explained. 
     The piston  18  is movable in a direction of a centerline A 1  of the cylinder  15 . The piston  18  receives a pressure of the pressure chamber  19  and is urged in the direction of the centerline A 1 . The driver blade  21  is formed in the piston  18 . The driver blade  21  is formed as one body with the piston  18 , and the driver blade  21  and the piston  18  configure the striker  22 . Each of the driver blade  21  and the piston  18  is made of a metal. 
     As shown in  FIG.  1   , a power transmission mechanism  24  is formed inside the nose portion  13 . The power transmission mechanism  24  transmits power of an electric motor (motor)  23  to the driver blade  21 . A trigger  25  is formed in the handle  12 , and a trigger switch  26  is formed inside the handle  12 . The trigger switch  26  is turned ON when an operational force is applied to the trigger  25 , and is turned OFF when the operational force applied on the trigger  25  is released. 
     A mounting portion  39  is connected to the handle  12 . A battery  27  is attachable to and detachable from the mounting portion  39 . The battery  27  supplies electric power to the electric motor  23 . The battery  27  is a direct-current power supply. 
     Note that a case of a nail  28  as the fastener will be explained in the present first embodiment. 
     As shown in  FIG.  3   , a magazine  29  that houses the nails (fasteners)  28  shown in  FIG.  1    is attached to the nose portion  13 . The nails  28  that are housed in the magazine  29  are lined in series. The magazine  29  has a feeding mechanism that feeds the nails  28  to the nose portion  13 . As shown in  FIG.  2   , the magazine  29  is arranged so as to make a predetermined angle θ from the handle  12  of the main body  14 . This is for preventing the magazine  29  from interfering with the electric motor  23  shown in  FIG.  1   . In other words, when the magazine  29  is arranged so as to tilt by the angle θ from a vertical direction, the interference between the magazine  29  and the electric motor  23  can be prevented. 
     As shown in  FIG.  1   , a bumper  30  is formed between the cylinder  15  and the nose portion  13 . The bumper  30  is monolithically made of a rubber-form elastic body such as elastomer. The bumper  30  is a buffer member that absorbs kinetic energy of the piston  18  when receiving a movement load of the piston  18  and elastically deforming. 
     The electric motor  23  has a stator  35  that does not rotate with respect to a housing for use in the motor and a rotor  36  that can rotate inside the housing for use in the motor. The electric motor  23  of the present first embodiment is a brushless motor. The rotor  36  is fixed to an output shaft  38 , and the output shaft  38  is supported by two bearings  37 . The output shaft  38  is rotatable around an axis line A 2 . 
     The power transmission mechanism  24  shown in  FIG.  4    is a conversion mechanism that converts a rotative force of a pin wheel shaft  31  that is a driving shaft into a reciprocating movement force of the driver blade  21 . The power transmission mechanism  24  has a pin wheel (rotary plate)  32 , a pinion pin (pin)  33  and a protrusion portion  21   a . The pin wheel  32  is fixed to the pin wheel shaft  31 . A plurality of the pinion pins  33  are formed in the pin wheel  32  so as to be along a rotary direction of the pin wheel. A plurality of the protrusion portions  21   a  are formed in the driver blade  21  so as to be along a movement direction of the driver blade. 
     The pinion pin  33  is engageable with and releasable from the protrusion portion  21   a  of the driver blade  21 . When the pinion pin  33  engages with the protrusion portion  21   a  and when the pin wheel  32  rotates counterclockwise in  FIG.  4   , the driver blade  21  moves in a “Q” direction. When all the pinion pins  33  release from all the protrusion portions  21   a , the mechanism does not allow the rotative force of the pin wheel  32  to be transmitted to the driver blade  21 . 
     Specifically, a state of the power transform mechanism  24  is switched between the engaging state of the pinion pin  33  of the pin wheel  32  with the protrusion portion  21   a  and the releasing state of the same from the protrusion portion  21   a  by the rotation of the pin wheel  32  due to the driving of the electric motor  23 . For example, when the pin wheel  32  rotates counterclockwise and when the pinion pin  33  engages with the protrusion portion  21   a  of the driver blade  21 , the rotative force of the pin wheel  32  is transmitted to the driver blade  21 , and the driver blade  21  and the piston  18  shown in  FIG.  1    move in a direction (“Q” direction) coming close to the pressure chamber  19 . 
     On the other hand, when the pinion pin  33  releases from the protrusion portion  21   a , the rotative force of the pin wheel  32  is not transmitted to the driver blade  21 , and the driver blade  21  and the piston  18  move in a direction (“R” direction) going away from the pressure chamber  19  due to the pressure of the pressure chamber  19 . 
     In other words, in the driving tool  10  of the present first embodiment, the movements of the driver blade  21  in the direction coming close to the pressure chamber  19  and the direction going away from the pressure chamber  19  are made by the engaging/releasing of the plurality of protrusion portions  21   a  formed in the driver blade  21  with/from the plurality of pinion pins  33  included in the rotatable pin wheel  32  formed in the main body  14 . Further, the movements are made by the rotation of the pin wheel  32  due to the driving of the electric motor  23  formed in the main body  14 . 
     As described above, in the driving tool  10 , the pressure chamber  19  is formed as the striking driver in the main body  14  of the driving tool, and the air that is stored in the pressure chamber  19  is further compressed by the movement of the driver blade  21  toward the pressure chamber  19 . When the pinion pins  33  are released from the protrusion portions  21   a , the compressed air is also released, the driver blade  21  is driven for shot by the releasing of the compressed air, and the nail  28  is driven into a desirable part such as a wood piece. 
     Next, in the driving tool  10  of the present first embodiment, a structure of the blade guide forming the injection path  40  in which the driver blade  21  moves will be explained. 
     In the driving tool, the nail jamming in which the nail is jammed in the injection port generally occurs in some cases. The larger the driving energy is, the larger the necessary power for solving the nail jamming is, and therefore, a lot of time and effort for solving the nail jamming are needed so often. Further, in the pneumatic-type driving tool  10 , the driver blade  21  is urged by the internal compressed air even in the nail jamming, and therefore, the time and effort for solving the nail jamming tends to increase. The nail jamming is a phenomenon in which a jammed nail  44  is stuck between the driver blade  21  and an inner wall of the injection path  40  as shown in  FIG.  5   , and the driver blade  21  does not move, either, and therefore, it is difficult to solve the nail jamming. 
     The driving tool  10  of the present first embodiment has a structure that easily releases the stuck jam nail  44  at the time of the occurrence of the nail jamming. 
     As shown in  FIGS.  1  and  5   , the driving tool  10  has a first blade guide  41  fixed to the nose portion  13  of the main body  14 , and a second blade guide  42  attached to the first blade guide  41  and configured to form the injection path  40  for the nail  28  together with the first blade guide  41 . The second blade guide  42  is assembled to the first blade guide  41 , and is attached to the nose portion  13  together with the first blade guide  41  by using bolts  45 . The driver blade  21  and the injection path  40  that is the path for the nail  28  are made of the first blade guide  41  and the second blade guide  42 . 
     The driver blade  21  is arranged so as to go through the space  46  surrounded by two opposite side walls  40   a  and  40   b  of the injection path  40 , a top wall  40   c  and a bottom wall  40   d.    
     As shown in  FIG.  6   , the driving tool is structured so that either one of the two side walls  40   a  and  40   b  is released from the injection path  40  when the first blade guide  41  and the second blade guide  42  are separated from each other by loosening the two bolts  45 . 
     In the structure shown in  FIG.  5   , the (one) side wall  40   a  of the two side walls  40   a  and  40   b  is formed as one body with the first blade guide  41 , and the (other) side wall  40   b  of the two side walls  40   a  and  40   b  is formed as one body with the second blade guide  42 . Further, the top wall  40   c  is formed as one body with the first blade guide  41 , and the bottom wall  40   d  is formed as one body with the second blade guide  42 . 
     In more detailed explanation, the side wall  40   a  formed in the first blade guide  41  is a part of the concave portion  41   a  of the first blade guide  41 , and the side wall  40   b  formed in the second blade guide  42  is the convex portion  42   a  that protrudes from the second blade guide  42 . In this structure, the top wall  40   c  is also a part of the concave portion  41   a  of the first blade guide  41 . 
     In the concave portion  41   a  of the first blade guide  41 , a housing portion  41   b  that houses the side wall  40   b  (convex portion  42   a ) formed in the second blade guide  42  is formed. 
     In the manner, in the structure shown in  FIG.  5   , when the second blade guide  42  is detached from the first blade guide  41  by loosening the two bolts  45  as shown in  FIG.  6   , the side wall  40   b  (convex portion  42   a ) formed in the second blade guide  42  separates from the injection path  40 . Accordingly, the side wall at which the jam nail  44  is stuck is removed, and therefore, the jam nail  44  can be easily taken out. 
     In other words, the nail jamming of the driving tool  10  can be easily solved. 
     The side wall  40   b  that is separated from the injection path  40  when the second blade guide  42  is detached from the first blade guide  41  does not always need to be formed as one body with the second blade guide  42 , and may be formed as a body different from the second blade guide  42 . 
     It is only required to arrange the top wall  40   c  and the bottom wall  40   d  so as to be at least separatable from each other, and the side wall  40   b  that separates from the injection path  40  is formed in the bottom wall  40   d . The side wall  40   a  that does not separate from the injection path  40  may be formed as one body with the top wall  40   c  or may be formed as a body different therefrom. 
     In the case of the pneumatic-type driving tool, when the nail jamming occurs, the jam nail  44  is stuck between the driver blade  21  and the side wall of the blade guide under a high pressure, and therefore, the jam nail  44  cannot be easily taken out. However, in the driving tool  10  of the present first embodiment, the jam nail  44  can be easily taken out. 
     In a case of an air-type driving tool, the driver blade  21  can be easily moved by pulling out an air hose. On the other hand, in the case of the pneumatic-type driving tool that always contains the compressed air, it is difficult to move the driver blade  21  toward the pressure chamber  19 , and it is not easy to solve the nail jamming. However, in the driving tool  10  of the present first embodiment, the nail jamming can be easily solved in spite of the pneumatic type, and therefore, it is obvious that the driving tool  10  is effective as the pneumatic-type driving tool  10 . 
     Second Embodiment 
     In the present second embodiment, as shown in  FIG.  7   , the side wall  40   b  that is formed as one body with the second blade guide  42  becomes thinner toward the first blade guide  41  (An outer wall surface  40   ba  of the side wall  40   b  of the second blade guide  42  is formed so that its distance from an inner wall surface  40   bb  of the side wall  40   b  becomes gradually larger toward a setting position of the magazine  29 ). For example, the outer wall surface  40   ba  of the side wall  40   b  is formed at the same angle as a setting tilt angle of the magazine  29  so as to be parallel to the magazine  29  (which means that the wall surface  40   ba  becomes a tilted surface). 
     Since the outer wall surface  40   ba  of the side wall  40   b  that separates from the injection path  40  is the tilted surface as described above, a horizontal-directional component force is generated by a tilt component of the wall surface  40   ba  when the second blade guide  42  is detached from the first blade guide  41  as shown in  FIG.  8   , so that the wall surface  40   ba  easily separates from the side wall  41   aa  of the concave portion  41   a  of the first blade guide  41 . 
     Therefore, the second blade guide  42  can be more easily detached from the first blade guide  41 . 
     Third Embodiment 
     In the present third embodiment, as similar to the second embodiment, as shown in  FIG.  9   , the side wall  40   b  that is formed as one body with the second blade guide  42  becomes thinner toward the first blade guide  41  (An outer wall surface  40   ba  of the side wall  40   b  of the second blade guide  42  is formed so that its distance from an inner wall surface  40   bb  of the side wall  40   b  becomes gradually larger toward a setting position of the magazine  29 ). For example, the outer wall surface  40   ba  of the side wall  40   b  is formed at the same angle as a setting tilt angle of the magazine  29  so as to be parallel to the magazine  29 . 
     In the manner, as similar to the second embodiment, as shown in  FIG.  10   , a horizontal-directional component force is generated by a tilt component of the wall surface  40   ba  when the second blade guide  42  is detached from the first blade guide  41 , so that the wall surface  40   ba  easily separates from the side wall  41   aa  of the concave portion  41   a  of the first blade guide  41 . 
     Further, in the structure of the present third embodiment, a clearance  47  shown in  FIG.  9    is formed between the outer wall surface  40   ba  of the side wall  40   b  and the side wall  41   aa  of the concave portion  41   a  of the first blade guide  41  opposite to this wall surface  40   ba.    
     In the manner, a space is formed in a portion of the stuck jam nail when the bolts  45  are loosened, and the space between the wall surface  40   ba  and the side wall  41   aa  is enlarged at the beginning of the loosening of the bolts  45 , and therefore, the second blade guide  42  can be more easily detached from the first blade guide  41 . 
     Further, in the structure of the present third embodiment, the first blade guide  41  and the second blade guide  42  are attached so as to be parallel to the outer wall surface  40   ba  of the side wall  40   b  that separates from the injection path  40 . For example, the first blade guide  41  and the second blade guide  42  are attached at an angle causing the blade guides to be parallel to an extension direction “S” of the magazine  29  shown in  FIG.  9   . The second blade guide  42  is detachable from the first blade guide  41 . 
     Specifically, the second blade guide  42  is joined to the magazine  29  that houses the plurality of nails  28 , and the first blade guide  41  and the second blade guide  42  are attached so as to be parallel to the extension direction “S” of the magazine  29 . 
     In other words, in the structure of the present third embodiment, both the first blade guide  41  and the second blade guide  42  are attached by the two bolts  45  so as to be parallel to the outer wall surface  40   ba  of the side wall  40   b . At this time, the two bolts  45  are also attached at the same angle as those of the two blade guides. Therefore, in one example, the first blade guide  41 , the second blade guide  42  and the two bolts  45  are attached to the nose portion  13  so as to be parallel to the extension direction “S” of the magazine  29 . 
     In the manner, a slide direction of the second blade guide  42  in the detachment tilts from a contact portion between the jam nail  44  and the inner wall surface  40   bb  of the side wall  40   b  so as to be a direction going away from the jam nail  44 , and therefore, the second blade guide  42  is easy to slide. In other words, the second blade guide  42  is easily detached. 
     As a result, the second blade guide  42  can be more easily detached from the first blade guide  41 . 
     Fourth Embodiment 
     In a structure of the present fourth embodiment, as shown in  FIG.  11   , the (one) side wall  40   a  of the two side walls forming the injection path  40  is formed in the first blade guide  41 , and the other of the two side walls is formed as a body different from the first blade guide  41  and the second blade guide  42 . Specifically, the other side wall that separates from the injection path  40  is a third blade guide  43  that is imposed between the first blade guide  41  and the second blade guide  42 . A cross-sectional shape of the third blade guide  43  is an L shape. 
     In other words, in the structure of the present fourth embodiment, as shown in  FIG.  11   , the injection path  40  is made of the side wall  40   a  of the first blade guide  41 , the top wall  40   c  of the first blade guide  41 , the bottom wall  40   d  of the second blade guide  42 , and the third blade guide  43  arranged between the first blade guide  41  and the second blade guide  42 . 
     The third blade guide  43  has an engaging portion  43   a  that engages with an engaging portion  41   c  that is formed in the first blade guide  41 , the engaging portion  43   a  being near the side wall and the engaging portion  41   c  being near the first blade guide. In the manner, when the second blade guide  42  is attached to the first blade guide  41 , the engaging portion  43   a  near the side wall and the engaging portion  41   c  near the first blade guide engage with each other to form the side wall  43   b  of the injection path  40 . When the first blade guide  41  and the second blade guide  42  are separated from each other, the engaging between the engaging portion  43   a  near the side wall and the engaging portion  41   c  near the first blade guide is canceled. 
     As shown in  FIG.  11   , in the structure in which a corner engaging portion  43   c  of the third blade guide  43  engages with the first blade guide  41  when the second blade guide  42  is attached to the first blade guide  41 , a clearance  48  between the third blade guide  43  and the first blade guide  41  and a clearance  49  between the third blade guide  43  and the bolt  45  are formed. At this time, a width L 2  of the clearance  49  is larger than a width L 1  of the clearance  48  (L 2 &gt;L 1 ). 
     In the manner, as shown in  FIG.  12   , when the bolts  45  are loosened, the second blade guide  42  moves downward (in a “T” direction), and the third blade guide  43  moves in a lateral direction (in a “U” direction). In other words, a hole diameter of a screw hole into which the bolt  45  is screwed in the third blade guide  43  is formed to be large, and therefore, when the bolts  45  are loosened, the third blade guide  43  moves downward (in the T direction) because of a weight itself, and easily moves in the lateral direction (in the U direction). 
     Therefore, when the bolts  45  are loosened, the third blade guide  43  can easily move in a direction going away from the jam nail  44 . 
     In the structure of the present fourth embodiment, as similar to the third embodiment, as shown in  FIGS.  11  and  12   , the first blade guide  41  and the second blade guide  42  are attached so as to be, for example, parallel to the extension direction “S” of the magazine  29  shown in  FIG.  9   . Specifically, the second blade guide  42  is joined to the magazine  29  that houses the plurality of nails  28 , and the first blade guide  41  and the second blade guide  42  are attached at the angle that makes the blade guides parallel to the extension direction “S” of the magazine  29 . 
     In other words, also in the present fourth embodiment, each of the first blade guide  41  and the second blade guide  42  is attached at the angle that makes each blade guide parallel to the magazine  29 , and the two bolts  45  are also attached at the same angle as those of the two blade guides. Note that the first blade guide  41 , the second blade guide  42  and the two bolts  45  are attached to the nose portion  13  so as to be parallel to the extension direction “S” of the magazine  29  in one example. 
     In the manner, as similar to the third embodiment, as shown in  FIG.  12   , the slide direction of the second blade guide  42  in the detachment is the direction going away from the contact portion between the jam nail  44  and the inner wall surface  43   ba  of the side wall  43   b , and therefore, the second blade guide  42  easily slides. In other words, the second blade guide  42  is easily detached. 
     As a result, the second blade guide  42  can be more easily detached from the first blade guide  41 . 
     As described above, the jam nail  44  can be more easily taken out in the structure of the present fourth embodiment than the structures of the first to third embodiments, and the nail jamming can be more easily solved. 
     In the structure of the present fourth embodiment, the third blade guide  43  is formed as the body different from the first blade guide  41  and the second blade guide  42 . Therefore, when the third blade guide  43  is made of a material having a hardness that is higher than those of materials of the first blade guide  41  and the second blade guide  42 , wall damage due to wearing against the jam nail  44  can be suppressed. In the manner, quality of the driving tool  10  can be improved. 
     The present invention is not limited to the foregoing embodiments, and various modifications can be made within the scope of the present invention. For example, in the first to fourth embodiments, the explanation has been made for the case of the mechanism using the pin wheel as the reeling mechanism of the drier blade  21 . However, as the reeling mechanism of the driver blade  21 , a reeling mechanism using a wire may be applicable. 
     EXPLANATION OF REFERENCE CHARACTERS 
       10  . . . driving tool,  11  . . . cylinder housing,  13  . . . nose portion,  14  . . . main body,  15  . . . cylinder,  18  . . . piston,  19  . . . pressure chamber (striking driver),  21  . . . driver blade,  23  . . . electric motor (motor),  28  . . . nail (fastener),  29  . . . magazine,  31  . . . pin wheel shaft,  32  . . . pin wheel (rotary plate),  33  . . . pinion pin (pin),  40  . . . injection path,  41  . . . first blade guide,  42  . . . second blade guide,  43  . . . third blade guide,  46  . . . space