JP2009083091A - Driving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving machine holding a locking tool to be suitably drivable and having improved durability. <P>SOLUTION: The driving machine is equipped with: a driver blade 4Ba for hitting a nail 10; and a nose part 3 slidably guiding the driver blade 4B and provided with an injection passage 31a supplied with the nail 10 for being injected. An injection hole 31a for injecting the nail 10 is regulated at a leading end of the injection passage 31a in the injection direction. The injection hole 31a is formed of a first guide part 31 and a second guide part 32 movable to the first guide part 31 for changing a cross section orthogonal to the injection direction of the injection hole 31a. The second guide part can be fixed to the first guide part 31 in a plurality of positions where the driver blade 4B does not interfere with the second guide part 32. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a driving machine.

  2. Description of the Related Art Conventionally, there is a driving machine that hits a stopper such as a nail with a driver blade to drive a nail into a wood or the like. In this driving machine, the driver blade is driven with compressed air, fuel such as gas, or a motor as power as power. In this driving machine, a stopper is supplied into an injection passage in which a driver blade slides, and the stopper in the injection passage is struck by a driver blade to drive out the stopper from an injection hole at the tip of the injection passage. .

  In the driving machine in which the nail in the injection hole is driven out by this driver blade, a reaction to operate the driver blade occurs in the main body of the driving machine, and the driving machine is moved in the direction opposite to the driving direction of the stopper. The phenomenon to operate occurs. Due to this reaction, a rotating moment is generated in which the tip of the nose portion forming the injection hole is moved forward at the same time that the stopper is driven out from the injection hole. Due to this rotational moment, the nail in the injection passage is tilted, and the nail may be driven in this tilted state, resulting in poor nailing finish. In particular, in the case of a nail having a small head diameter and a short shaft length, the inclination angle of the nail in the injection hole becomes large, so that there is a greater tendency to be driven at an inclination.

In order to prevent this, as shown in Patent Document 1, a structure is disclosed in which a guide member having an inner diameter suitable for the size of a fastener to be used is attached to the tip of the nose portion, and the guide member is replaced depending on the application. Yes. Further, as shown in Patent Document 2, a structure in which a rotatable rotatable guide member in which an inclined surface that guides the distal end portion of the stopper to the center of the injection hole is arranged at a position where the nose portion injection hole is formed is provided. It is disclosed.
JP 2004-330372 A JP 2004-330366 A

  In the structure according to Patent Document 1, the stopper can be suitably held so as to be driven in, but there is a problem that the guide member comes off during the work or the removed guide member is lost. In the configuration according to Patent Document 2, since the guide member is located on the sliding track of the driver blade, the guide member receives an impact force every time the stopper is driven, and the durability of the guide member is ensured. It was difficult.

  Accordingly, an object of the present invention is to provide a driving machine that can hold a stopper suitably and that has improved durability.

  In order to solve the above-described problems, the present invention provides a driver blade that strikes a stopper, a nose portion that guides the driver blade in a slidable manner, and is formed with an injection passage through which the stopper is supplied and ejected. , And an injection hole through which the stopper is injected is defined at the tip of the injection passage in the injection direction, and the injection hole changes a cross section perpendicular to the injection direction of the first guide portion and the injection hole. A driving device defined by a second guide portion movable with respect to the first guide portion and having an arrangement means for arranging the second guide portion at a plurality of positions with respect to the first guide portion. Provide a machine. In this driving machine, it is preferable that the arrangement means arranges the second guide portion at a position where the driver blade does not interfere.

  According to such a configuration, the injection hole can be formed in accordance with the size of the stopper to be driven by changing the cross section of the injection hole. At this time, the contact of the driver blade with the second guide portion can be prevented.

  The nose portion is connected to a magazine containing a plurality of the stoppers and supplying the stoppers into the injection passage, and the disposing means moves the second guide portion from the magazine to the injection passage. It is preferable that the second guide portion is configured to be able to reciprocate in the direction and to reduce the cross-sectional area when the second guide portion moves in a direction from the magazine toward the injection passage.

  According to such a configuration, the direction in which the stopper moves from the magazine into the injection passage and the moving direction of the second guide portion can be substantially matched. Therefore, the area of the cross section can be reduced with a simple configuration.

  The second guide portion is attached so as to be rotatable about an axis substantially orthogonal to the injection direction and the direction from the magazine toward the injection passage, and the disposing means attaches the second guide portion to the second guide portion. The first guide of the second guide part by the spring, which is in contact with the second guide part, and is urged to rotate so as to reduce the cross-sectional area by moving in the direction close to the one guide part And a restriction part that restricts the distance to the part.

  The second guide part has a held part extending in a direction from the magazine toward the injection passage, and the disposing means is provided in the nose part or the magazine, and the held part is removed from the magazine. You may comprise including the holding | maintenance part which can hold | maintain the to-be-held part in arbitrary positions while hold | maintaining so that sliding to the direction which goes to this injection path is possible.

  According to these structures, all can fix a 2nd guide part with respect to a 1st guide part in several positions.

  According to the driving machine of the present invention, the stopper can be suitably held so as to be driven and durability is improved.

  Hereinafter, a driving machine according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. A nailing machine 1 as a driving machine shown in FIG. 1 is a tool for driving a nail 10 (FIGS. 2 and 4) as a stopper, and uses compressed air as power.

  The nailing machine 1 is integrally provided with a frame 2, a handle 2 </ b> A located at one of the frames 2, and a nose portion 3 located at the lower end of the frame 2. In order to accumulate compressed air from a compressor (not shown), a pressure accumulating chamber 2a is formed in the handle 2A and the frame 2 of the nail driver 1. The pressure accumulating chamber 2a is connected to the compressor via an air hose (not shown).

  A cylindrical cylinder 5 is provided in the frame 2, a piston 4A is provided in the cylinder 5 so as to be slidable up and down, and a driver blade 4B is integrally formed with the piston 4A. The direction in which the driver blade 4B moves together with the piston 4A is defined as the injection direction.

  A return air chamber 5a for storing compressed air for returning the driver blade 4B to the top dead center is formed on the outer periphery of the lower end of the cylinder 5. A check valve 5A is provided at the center of the cylinder 5 in the axial direction, and an air passage 5b is formed to flow only in one direction from the inside of the cylinder 5 to the return air chamber 5a outside the cylinder 5. An air passage 5c that is always open to the return air chamber 5a is formed. A piston bumper 6 is provided at the lower end of the cylinder 5 to absorb the surplus energy of the piston 4A after driving the nail 10.

  At the base of the handle 2A, there are a trigger 12 that is operated by an operator, an arm plate 13 that is rotatably attached to the trigger 12, and protrudes from the lower end of the nose portion 3 to the vicinity of the arm plate 13 from the frame 2 to the nose portion 3 side. Triggered by the push lever 14 that is urged to move along the nose portion 3, the trigger valve portion 15 that is a switching valve that communicates with a main valve 42, which will be described later, and sends and exhausts compressed air, and the arm plate 13 A plunger 16 or the like for transmitting to the valve unit 15 is provided.

  As is well known, when both the pulling operation of the trigger 12 and the pressing operation of the push lever 14 against the workpiece 48 are performed, the plunger of the trigger valve portion 15 is linked by the link mechanism of the arm plate 13 and the trigger 12. 16 is configured to be pushed up.

  On the upper outer periphery of the cylinder 5, a main valve 42, a main valve chamber 43 that accommodates the main valve 42, a main valve spring 44 that biases the main valve 42 toward the bottom dead center side, and a cylinder 5 are installed. There is provided an exhaust bar 46 and the like for blocking an air passage 45 for exhausting compressed air in the upper chamber of the piston 4A by contact with the main valve 42. The air passage 45 communicates with the atmosphere through an exhaust hole (not shown) provided in the upper part of the frame 2.

  As shown in FIG. 2, the nose portion 3 includes a first guide portion 31 that is located at the lower end of the frame 2 and extends in a direction parallel to the sliding direction of the driver blade 4B. In a direction (right side in FIG. 3) in which a substantially U-shaped section of the injection passage 31a described later of the nose portion 3 is opened (a right side in FIG. 3), there is a magazine device 21 that contains a bundle of nail bundles. Is provided.

  The first guide portion 31 is fixed to the frame 2 with bolts (not shown), and is a place where the driver blade 4B slides, and an injection passage 31a which is a place where the nail 10 is supplied from a magazine 22 described later is formed. Has been. As shown in FIG. 3, the injection passage 31 a has a substantially U-shaped cross section orthogonal to the injection direction of the driver blade 4 </ b> B, and the substantially U-shaped opening portion is described later from the first guide portion 31. It is configured to go to the magazine 22 side (FIG. 2). Further, in the first guide portion 31, at a position that is a front end position in the injection direction and becomes a substantially U-shaped opening portion, as shown in FIG. 3, a contact surface 31 </ b> A that contacts a second guide portion 32 described later, 31A is defined, and as shown in FIG. 2, an injection hole 31b through which the nail 10 is injected is defined at a position that is the end of the injection passage 31a.

  A second guide portion 32 that is pivotally supported by a rotation shaft portion 33 is provided at a position that is a front end position of the first guide portion 31 and that is a substantially U-shaped opening side position. The rotation shaft portion 33 that pivotally supports the second guide portion 32 is provided in the magazine 22, and the rotation shaft has a substantially U-shaped opening direction (from the first guide portion 31 to be described later). In a direction substantially perpendicular to each of the magazines 22 in the direction toward the magazine 22).

  The second guide portion 32 has a substantially L shape from a guide portion 32A that defines the injection hole 31b in cooperation with the first guide portion 31 and a contact portion 32B that comes into contact with a cam 34 and a spring 35, which will be described later. The L-shaped connecting portion is pivotally supported by the rotation shaft portion 33 so as to be rotatable.

  As shown in FIG. 3, the guide portion 32 </ b> A is formed with a guide surface 32 </ b> C that defines the injection hole 31 b (FIG. 2) and the injection passage 31 a in cooperation with the inner surface of the first guide portion 31. As shown in FIG. 3, the guide surface 32 </ b> C is configured in a curved shape in a cross section orthogonal to the injection direction, similarly to the substantially U-shaped curved portion of the first guide portion 31. Further, in the vicinity of the guide surface 32C and at positions facing the respective contact surfaces 31A and 31A, the contact surfaces 32D and 32D to which the contact surfaces 31A and 31A contact are provided. As shown in FIG. 3, the guide surface 32 </ b> C and the contact surfaces 32 </ b> D and 32 </ b> D are connected to the guide surface 32 </ b> C and the first guide portion when the contact surfaces 31 </ b> A and 31 </ b> A contact the contact surfaces 32 </ b> D and 32 </ b> D. An injection hole 31b defined by the inner peripheral surface of 31 is configured not to interfere with the driver blade 4B. With this configuration, when the driver blade 4B is driven, the driver blade 4B and the second guide portion 32 are prevented from coming into contact with each other, and the durability of the nail driver 1 can be increased.

  The contact portion 32B is urged downward by a spring 35. Accordingly, the second guide portion 32 rotates clockwise on the paper surface, that is, the guide surface 32C enters the substantially U-shaped interior of the first guide portion 31, and the contact surfaces 31A and 31A abut against the contact surfaces 32D and 32D. It is so energized. A cam 34 is provided at a position opposite to the spring 35 with the contact portion 32B interposed therebetween. The outer periphery of the cam 34 is formed in a semicircular shape from an arcuate cam surface 34A and a cut-out surface 34B on a plane, and is in contact with the opposite surface of the surface of the contact portion 32B with which the spring 35 is in contact. It is configured. Since the distance from the rotation shaft portion 33 to the cam 34 is larger than that from the rotation shaft portion 33 to the spring 35, the spring 35 can be easily moved by rotating the cam 34 based on the lever principle. The contact portion 32B can be moved upward by being compressed. Further, the distance from the rotation shaft portion 33 to the guide portion 32A is substantially equal to the distance from the rotation shaft portion 33 to the spring 35. The cam 34, the spring 35, and the contact surface 31A constitute an arrangement means for arranging the second guide portion 32 at a plurality of positions with respect to the first guide portion 31.

  When the cam 34 is rotated from the state of FIG. 2, the cam surface 34 </ b> A contacts as shown in FIG. 4, so that the contact portion 32 </ b> B counters the biasing force of the spring 35 and counterclockwise on the paper surface. Move to. As the contact portion 32B moves, the guide portion 32A moves away from the first guide portion 31, and the area of the cross section of the injection hole 31b increases as shown in FIG. Further, a contact member 14A that is continuous with the push lever 14 and that can come into contact with the material to be driven is provided at the distal end of the nose portion 3 in the injection direction and around the first guide portion 31 and the guide portion 32A. ing.

  The magazine device 21 is provided with a magazine 22 for filling the nail 10 and a nail feeder 23 for sequentially feeding the nail 10 loaded in the magazine 22 into the injection passage 31a. According to such a configuration, the direction in which the nail 10 moves from the magazine 22 into the injection passage 31a and the movement direction of the guide portion 32A in the second guide portion 32 can be substantially matched. Therefore, the area of the injection hole 31b can be changed with a simple configuration.

  When the nail 10 is hit with the nail driver 1 having the above-described configuration, a reaction to operate the driver blade 4B occurs in the nail driver 1, and a phenomenon occurs in which the nail driver 1 is operated in a direction opposite to the injection direction. By this reaction, the nail 10 is driven out from the injection hole 31b, and at the same time, a rotational moment is generated in which the tip of the nose portion 3 is moved forward (in the direction from the magazine device 21 toward the nose portion 3). The head of the nail 10 may be tilted forward in combination with the movement of the tip of the nose portion 3 due to this rotational moment. Therefore, when the nail 10 is a small nail, as shown in FIG. 2, the cam 34 is rotated to a position where the notch surface 34B faces the contact portion 32B, and the cam surface 34A is not in contact with the contact portion 32B. In this state, as shown in FIG. 3, the contact surfaces 31A and 31A are brought into contact with the contact surfaces 32D and 32D, and the guide surface 32C is brought close to the inner surface of the first guide portion 31 to thereby eject the injection hole 31b. Reduce the cross-sectional area of. By adopting such a shape, the inclination angle of the nail 10 near the tip of the injection passage 31a when the nail 10 having a small nail head and a short nail length is driven is reduced, so that the nail head is inclined forward. It is possible to prevent finishing defects.

Conversely, when hitting a large nail 10, if the cross-sectional area of the injection hole 31b remains small, the nail head may hit the guide surface 32C when the nail 10 is injected, and the surface of the guide surface 32C may be damaged. If the guide surface 32C is scratched, the tip of the nail 10 may be caught by the scratched portion of the guide surface 32C when the nail 10 is guided to the injection hole 31b by sliding on the guide surface 32C. Therefore, as shown in FIG. 4, the cam 34 is operated to rotate the cam surface 34A so as to contact the contact portion 32B, and the contact portion 32B is moved against the urging force of the spring 35. As shown in FIG. 5, the injection passage 31a is enlarged to widen the injection hole 31b (FIG. 5). In this state, the center of the cross section perpendicular to the sliding direction of the driver blade 4B (the center of the driver blade 4B in FIG. 5) is eccentric from the center of the expanded injection port 35b.
Thereby, when the big nail 10 is used, it is suppressed that a nail head contact | abuts to the guide surface 32C, and a damage | wound generate | occur | produces, and it can maintain the stable nail supply.

  In the first embodiment, in the cam 34, the guide portion 32A of the second guide portion 32 is defined at two positions, a position close to the first guide member 31 and a position away from the first guide member 31, but the present invention is not limited to this. You may make it prescribe | regulate in multiple places using the cam 134 as shown to 6 (a). Specifically, in the cam 134, in addition to the cam surface 134D, a first notch surface 134A, a second notch surface 134B, and a third notch surface 134C, which are three surfaces having different distances from the rotation center axis G, are provided. . As shown in FIGS. 6A to 6D, the cam 134 is rotated so that the three surfaces 134A to 134C and the cam surface 134D become the top surfaces (locations in contact with the contact portion 32B). By switching, the position of the guide portion 32A can be regulated at four locations.

  Further, as shown in FIGS. 7A and 7B, the position of the contact portion 32B may be defined using a change lever 234 instead of the cam. Specifically, in the magazine 22, approximately in the vicinity of the abutting portion 32 </ b> B, the injection direction and the direction in which the substantially U-shape is opened (the direction from the first guide portion 31 to the magazine 22 described later). A pin 234A that is movable in the orthogonal direction is disposed. A notch 234a is formed in the outer peripheral portion of the pin 234A, and an inclined surface 234B continuous with the outer periphery of the pin 234A is provided on the inner surface of the notch 234a.

  When the change lever 234 is positioned on the notch 234a, the contact portion 32B is urged by the spring 35 and enters the notch 234a. In this state, the guide portion 32A is in a state of being close to the first guide portion 31. . When the change lever 234 is moved from this state, the inclined surface 234B comes into contact with the inclined surface formed at the corner of the contact portion 32B, and the contact portion 32B resists the biasing force of the spring 35, and the outer periphery of the pin 234A from within the notch 234a. Move to the part. In this state, the guide portion 32 </ b> A is separated from the first guide portion 31.

  Further, as shown in FIGS. 8A and 8B, a configuration in which the change lever 334 slides in the biasing direction of the spring 35 may be adopted. The change lever 334 includes a pin 334A that is in contact with the contact portion 32B, and a pair of arm portions 334B and 334B that are provided at both ends of the pin 334A and grip a part of the magazine 22. The arm portion 334B is provided with a ball 334C that is biased toward the magazine 22 and a spring 334D that biases the ball 334C, and the ball 334C is one of a plurality of recesses 22a formed in the magazine 22. It is possible to regulate the position of the contact portion 32B by being fitted into the contact portion.

  In the first embodiment, the shape of the injection passage is changed by rotating the second guide portion. However, the shape is not limited to this, and for example, the second guide portion is moved closer to or away from the first guide portion. You may take the structure moved so that it may do. Specifically, the second guide portion is provided with a held portion extending in the direction from the magazine toward the injection passage, and the nose portion or magazine can slide the held portion in the direction from the magazine toward the injection passage. And a holding portion capable of fixing the held portion at an arbitrary position. By adopting such a configuration, the second guide portion can be moved in the direction from the magazine toward the injection passage, and the guide member can be moved closer to and away from the first guide portion and fixed at a predetermined position. Become.

  Next, a driving machine according to a second embodiment of the present invention will be described with reference to FIGS. The nailing machine 401 shown in FIG. 10 has substantially the same configuration as that of the nailing machine 1 of the first embodiment except for the nose part 403. The description is omitted by adding 400 to the reference numerals.

  The nose portion 403 is located at the lower end of the frame 402 and includes a first guide portion 431 that extends in a direction parallel to the sliding direction of the driver blade 404B. The first guide part 431 includes a main body part 432 and a sub body part 433.

  The main body 432 is fixed to the frame 402 with bolts (not shown), and a main injection passage 432a is formed where the driver blade 404B slides and where nails are supplied from the magazine 422. The main injection passage 432a is formed at a position where the cross section perpendicular to the injection direction of the driver blade 404B of the main barrel 432 is substantially U-shaped, like the injection passage 31 of the first embodiment.

  The sub barrel portion 433 is disposed at the distal end side of the main barrel portion 432 and at the foremost position of the nailing machine 401, and moves in a direction parallel to the sliding direction of the driver blade 404B with respect to the main barrel portion 432. It is configured to be possible. Further, the sub trunk portion 433 is connected to the push lever 414. Therefore, when the sub barrel 433 moves closer to the main barrel 432 (moves upward on the paper surface of FIG. 9), the push lever 414 is pushed up, and the plunger 416 is operated based on the operation of the push lever 414. It becomes possible.

  The sub barrel 433 has a substantially U-shaped cross section similar to that of the main barrel 432, and a sub injection passage 433a communicating with the main injection passage 432a is formed at the substantially U-shaped position. In the sub barrel portion 433, an injection hole 433b into which a nail is injected is defined at a position that is the end of the sub injection passage 433a. Therefore, the nail supplied into the main injection passage 432a is hit by the driver blade 404B, and is injected from the injection hole 433b through the main injection passage 432a and the sub injection passage 433a. In the sub barrel 433, the vicinity of the injection hole 433b has a structure substantially equal to the structure in the vicinity of the injection hole 31a of the first guide portion 31 in the first embodiment (structure such as the contact surfaces 31A and 31A).

  The outermost end portion that defines the injection hole 433 b in the sub trunk portion 433 is a place that comes into contact with the workpiece 448. Therefore, by pushing the nail driver 401 along the outermost end portion of the sub barrel portion 433 into the workpiece 448, the plunger 416 is pushed up, and the nail can be constructed. Since the front end portion of the sub barrel portion 433 only defines the injection hole 433b, it is configured to be thinner than the front end portion of the nail driver 1 of the first embodiment. Therefore, the tip of the nail driver 401 can be suitably placed along the material to be driven even in a narrower portion than the nail driver 1 of the first embodiment, and the operation can be suitably performed.

  Further, the sub trunk 433 is provided with a plate 434 extending in the direction from the sub trunk 433 to the main trunk 432 and from the sub trunk 433 to the magazine 422 and arranged in parallel with the injection direction. A second guide portion 435 that is pivotally supported by a rotation shaft portion 436 is provided at a position that is a substantially U-shaped opening side position of the plate 434. The rotation shaft portion 436 that pivotally supports the second guide portion 435 extends in a direction substantially orthogonal to the injection direction and the direction in which the substantially U-shaped opening is formed.

  The second guide portion 435 includes a guide portion 435A that defines an injection hole 433b in cooperation with the sub barrel portion 433, and a contact portion 435B that comes into contact with a cam 437 and a spring 438, which will be described later. The shaft 436 is pivotally supported by a pivot shaft 436 at a substantially intermediate portion between the portion 435A and the contact portion 435B.

  The guide portion 435A has the same configuration (the guide surface 32C, the to-be-contacted surfaces 32D, 32D, etc.) as the guide portion 32A of the first embodiment. Therefore, the injection hole 433b defined by the second guide portion 435 and the sub trunk portion 433 is configured to be non-interfering with the driver blade 404B. With this configuration, when the driver blade 404B is driven, the driver blade 404B and the second guide portion 435 are prevented from coming into contact with each other, and the durability of the nailing machine 401 can be increased.

  When the contact portion 435B is urged by the spring 438, the second guide portion 435 is urged clockwise on the paper surface in the same manner as the second guide portion 32 of the first embodiment. A cam 437 having a cam surface 437A and a cut-out surface 437B on a plane and having the same configuration as the cam 34 of the first embodiment is provided at a position opposite to the spring 438 across the contact portion 435B. Is provided. Therefore, by rotating the cam 437, the spring 438 is easily compressed to rotate the second guide portion 435 counterclockwise, and the guide portion 435A moves away from the auxiliary body portion 433, and the injection hole 433b. The area of the cross section can be increased. Therefore, similarly to the nail driver 1 of the first embodiment, the size of the injection hole 433b can be changed according to the size of the nail to be driven, and stable nail supply can be maintained.

  Needless to say, the nailing machine 401 according to the second embodiment can adopt a cam modification similar to that of the first embodiment.

  The driving machine according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, this embodiment refers to a pneumatic nailing machine. However, the present invention is not limited to this. If the driving machine includes a driver blade, a combustion type driving machine using a fuel, a motor, etc. The present invention can be similarly implemented in the electric driving machine used.

Sectional drawing of the driving machine which concerns on 1st embodiment of this invention. The detailed sectional view of the nose part circumference at the time of driving in a small nail with the driving machine concerning a first embodiment of the present invention. Sectional drawing orthogonal to the injection direction of the 1st guide part and the 2nd guide part at the time of driving in a small nail with the driving machine which concerns on 1st embodiment of this invention. The detailed sectional view of the nose part circumference at the time of driving in a big nail with the driving machine concerning a first embodiment of the present invention. Sectional drawing orthogonal to the injection direction of the 1st guide part and the 2nd guide part at the time of driving in a big nail with the driving device which concerns on 1st embodiment of this invention. The figure which concerns on the modification of the cam of the driving machine which concerns on 1st embodiment of this invention. The figure which concerns on the 1st modification using a change lever instead of the cam of the driving machine which concerns on 1st embodiment of this invention. The figure which concerns on the 2nd modification using a change lever instead of the cam of the driving machine which concerns on 1st embodiment of this invention. Sectional drawing of the driving machine which concerns on 2nd embodiment of this invention. Detailed sectional drawing of the nose part periphery of the driving machine which concerns on 2nd embodiment of this invention.

Explanation of symbols

1..Nailer 2..Frame 2A..Handle 2a..Accumulator 3. 3.Nose 4A..Piston 4B..Driver blade 5..Cylinder 5A..Check valve 5a..Return air chamber 5b · · Air passage 5c · · Air passage 6 · · Piston bumper 10 · · Nail 12 · · Trigger 13 · · Arm plate 14 · · Push lever 14A · · Contact member 15 · · Trigger valve portion 16 · · Plunger 21 · · · Magazine device 22 .. Magazine 23... Nail feeder 31... First guide portion 31 A.. Projecting surface 31 a .. Injection passage 31 b .. Injection hole 32... Second guide portion 32 A. Contact portion 32C ··· Guide surface 32D · · Contacted surface 33 · · Rotary shaft portion 34 · · Cam 34A · · Cam surface 34B · · Notch surface 35 · · Spring 41 · · Main valve portion 4 2 .... Main valve 43 ... Main valve chamber 44 ... Main valve spring 45 ... Air passage 46 ... Exhaust rubber 48 ...

Claims (5)

A driver blade that strikes the stop;
A nose portion that guides the driver blade in a slidable manner and has an injection passage that is supplied with the stopper and injected.
An injection hole through which the stopper is injected is defined at the tip of the injection passage in the injection direction,
The injection hole is defined by a first guide part and a second guide part movable with respect to the first guide part so as to change a cross section perpendicular to the injection direction of the injection hole,
A driving machine comprising an arrangement means for arranging the second guide portion at a plurality of positions with respect to the first guide portion.   2. The driving machine according to claim 1, wherein the arranging unit arranges the second guide portion at a position where the driver blade does not interfere. The nose portion is connected to a magazine that incorporates a plurality of the stoppers and supplies the stoppers into the injection passage.
The arrangement means is configured to be able to reciprocate the second guide portion in the direction from the magazine toward the injection passage, and when the second guide portion moves in the direction from the magazine toward the injection passage. The driving machine according to claim 1, wherein the driving machine is configured to reduce an area of the cross section. The second guide portion is attached to be rotatable about an axis substantially orthogonal to the injection direction and the direction from the magazine toward the injection passage,
The disposing means moves the second guide portion in a direction close to the first guide portion to rotate and bias the spring so as to reduce the cross-sectional area;
The control part of Claim 3 characterized by including the control part which contact | abuts to this 2nd guide part, and controls the distance with respect to this 1st guide part of this 2nd guide part by this spring. Driving machine. The second guide portion has a held portion that extends in a direction from the magazine toward the injection passage,
The arrangement means is provided in the nose part or the magazine and holds the held part so as to be slidable in a direction from the magazine toward the injection passage, and can hold the held part at an arbitrary position. The driving machine according to claim 3, comprising:

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