JP2002192291A - Fastener driving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastener driving machine which enables miniaturization. SOLUTION: The tip part which is provided inside a main cylinder 21 so as to be movable backward and forward is equipped with a piston body 30 which is projected forward from the tip of the cylinder, a chuck 70 which retains a fastener 1 separated from a coupled body connected with a plurality of fasteners 1 provided on the tip part of the piston body 30, and a driver body 50 which drives into the cylindrical part 3 a screw 4 whose one end is inserted inside the cylindrical part 3 of the fastener 1 and detaches the fastener 1 from the chuck 70. After driving the screw 4 by the driver body 50, the piston body 30 retreats to the back for the chuck 70 to retain the fastener 1 on one end of the coupled body. The piston body 30 moves forward so that the fastener 1 held by the chuck 70 is detached from the coupled body. The driver body 50 is provided inside the piston body 30 so as to be movable backward and forward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener driving machine for driving a fastener for fixing, for example, a carpet laid in a vehicle interior of a vehicle or a component disposed in the vehicle interior to a frame.

[0002]

2. Description of the Related Art A fastener 1 shown in FIG. 20 has been conventionally known. This fastener 1 has a flange 2 at the upper end.
And a screw 4 whose tip is inserted into the cylindrical portion 2 from the flange 3. Then, when the screw 4 is pushed into the cylindrical portion 3, the cylindrical portion 3 expands in a petal shape as shown in FIG.
Is fixed by the fastener 1.

A fastener driving machine for driving the fastener 1 into a state shown in FIG. 21 is disclosed in Japanese Patent Application Laid-Open No. Sho 59-45050.

[0004] Such a fastener driving machine has a fastener 1
, A hammer provided in the lower part of the operating cylinder so as to be movable up and down and hitting the head 4a of the screw 4 of the fastener 1 held by the chuck, and moving the operating cylinder up and down. It has a main piston and the like.

According to this fastener driving machine, when the operating cylinder is raised to a predetermined position by the main piston, the chuck holds the first fastener 1 of the connected body in which the plurality of fasteners 1 are connected. Then, the operating cylinder is lowered to the standby position by the main piston, and at the time of this lowering, the leading fastener 1 is disconnected from the connected body.

FIG. 2 shows the fastener 1 held by the chuck.
When the trigger is pulled by inserting it into the predetermined hole as shown in 0,
The hammer hits the head 4a of the screw 4 and the screw 4
, And as shown in FIG.
Expands. Thereafter, the hammer and the working cylinder are raised to a predetermined position, and the second fastener 1 is held by the chuck. After that, the working cylinder is lowered to the standby position, and the second fastener 1 is cut off from the connected body. It is in a standby state in which the first fastener 1 is driven.

[0007]

However, in such a fastener driving machine, since the operating cylinder and the main piston are arranged side by side, there is a problem that the size is increased.

[0008] The present invention has been made in view of the above circumstances, and an object thereof is to provide a fastener driving machine which can be reduced in size.

[0009]

In order to achieve the above object, a first aspect of the present invention is to provide a piston body which is provided in a cylinder so as to be movable in the front-rear direction and has a front end projecting forward from the front end of the cylinder; A chuck that is provided at the tip of the piston body and holds a fastener that is separated from a connected body that connects a plurality of fasteners, and a shaft member having one end inserted into the tubular portion of the fastener is driven into the tubular portion while driving the fastener. A driver body to be removed from the chuck, wherein after driving the shaft member by the driver body, the piston body retreats rearward, the chuck holds a fastener at one end of the connecting body, and thereafter the piston body moves forward. A fastener driving machine in which the fastener held by the chuck is separated from the connected body by the driver body. Characterized in that provided on the piston body rotatably to.

According to a second aspect of the present invention, the piston body has a piston portion movably provided in the cylinder in the front-rear direction, a front cylinder projecting forward from the piston portion, and a sub-cylinder formed therein and having a tip portion. Has a sub-cylinder body projecting forward from the tip of the cylinder, and the driver body includes a sub-piston provided movably in the front-rear direction in the sub-cylinder, and a rod provided on the sub-piston. It is characterized by having.

The invention according to claim 3 is characterized in that guide means for guiding the movement of the piston body in the front-rear direction and preventing rotation around the axis are provided in the cylinder.

According to a fourth aspect of the present invention, the guide means has a guide groove extending in the front-rear direction and engages with a guide member provided in the cylinder and the guide groove provided in the piston body. And a projection, wherein the guide member is
It is characterized in that it can be fixed at any angle in the direction around the axis of the cylinder.

The invention according to claim 5 is characterized in that a portion of the piston body protruding from the cylinder is provided with a rotation preventing member for preventing rotation of the piston body around an axis.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fastener driving machine according to the present invention will be described below with reference to the drawings. First Embodiment A fastener driving machine 10 shown in FIGS. 1 to 3 has a base 12 fixed to an upper portion of a grip 11.
And a main body 20 provided on the base 12, a feed mechanism 100 provided on a front end of the base 12 and feeding the fastener 1 to a chuck 70 described later.

The grip 11 has a grip chamber 13 (see FIG. 4) to which compressed air is supplied, a trigger 14,
A trigger valve 15 for switching the position of the spool 15P in conjunction with the trigger 14 is provided.

The main body 20 includes a main cylinder body (cylinder) 2
1, a piston body 30 provided in the main cylinder body 21 so as to be movable in the front-rear direction, a driver body 50 provided in the piston body 30 so as to be movable in the front-rear direction, and a distal end of the piston body 30 And the chuck 70 and the like provided in the main body. [Main Cylinder Body] The main cylinder body 21 has a first cylinder 2 having a circular hole 22 at the front end and an opening 23 at the rear end.
4 and a second cylinder provided in the rear portion of the first cylinder 24.
And a cylinder 25. An opening 25A is formed at the front end of the second cylinder 25, and the rear end is closed by a rear wall 25B.

A cylindrical guide member (guide means) 26 is disposed in the second cylinder 25, and the guide member 26 is attached to a rear wall 25B of the second cylinder 25 by a screw N1. Four guide grooves 26G extending in the front-rear direction are formed at equal intervals on the peripheral surface of the guide member 26. [Piston Body] The piston body 30 includes a first piston body 32 having a piston portion 31 disposed so as to be movable in the front-rear direction in the first cylinder 24, and a second piston body fixed to a rear portion of the first piston body 32. And a piston body 40.

The first piston body 32 has a cylindrical portion (sub cylinder body) 33 projecting forward from the piston portion 31 through the hole 22 of the main cylinder body 21. A sub-cylinder chamber 34 having an open rear end is formed at a rear portion inside the cylindrical portion 33, and a spring receiving hole 35 having a smaller diameter than the sub-cylinder chamber 34 is continuously formed in front of the sub-cylinder chamber 34. ing. Further, a rod hole 36 penetrating from the spring receiving hole 35 to the tip of the cylindrical portion 33 is formed in the cylindrical portion 33.

The second piston body 40 includes the first piston body 3
It is composed of a cylindrical body having a small-diameter cylindrical portion 41 fitted into the second cylinder chamber 34. The rear part of the second piston body 40 is fitted into the second cylinder chamber 25S of the second cylinder 25. Four guide ridges (projections) 43 extending in the front-rear direction are formed at equal intervals on the inner peripheral surface of the second piston body 40, and each guide ridge 43 is inserted into the guide groove 26 </ b> G of the guide member 26. ing. Also, the second piston body 40
Is formed to be larger than the diameter of the cylindrical portion 33 and the piston portion 3
The area of the front surface of the first device is larger than the area of the rear surface.

The first piston body 32 is connected to the first cylinder 24
The second piston body 40 is integrated with the first piston body 32 so as to move in the front-rear direction.
It moves inside the cylinder 25 in the front-back direction. When the first piston body 32 moves in the front-rear direction, the second piston body 40
Moves back and forth while being guided by the guide groove 26 </ b> G, thereby preventing the first piston body 32 from rotating in the first cylinder 24.

The space between the first cylinder 24 and the second piston body 40 is a first cylinder chamber 24S, and the inside of the second cylinder 25 is a second cylinder chamber 25S. The chamber 25S communicates with the inside of the second piston body 40.

As shown in FIG. 4, the first cylinder chamber 24S and the grip chamber 13 communicate with each other, and the second cylinder chamber 25S and the grip chamber 13 communicate with each other via the trigger valve 15. .

The piston portion 3 of the first piston body 32
A space 24Sd formed between the front surface of the first cylinder 24 and the front wall 24H of the first cylinder 24 communicates with the grip chamber 13 via a switching valve 150 described later. The second cylinder chamber 25S is in communication with the small-diameter exhaust hole 16 provided in the grip 11 via the trigger valve 15. [Driver Body] The driver body 50 includes the first piston body 32
A sub-piston 51 is disposed coaxially inside the sub-piston and is provided movably in the front-rear direction in the sub-cylinder chamber 34, and a rod (driver) 52 extending forward from the sub-piston 51. The tip 52A of the rod 52 is inserted into the rod hole 36 of the first piston body 32, and when the sub piston 51 advances, the tip 52A of the rod 52 is inserted into the rod hole 36.
And the fastener 4 is driven by hitting the head 4 a of the screw 4 of the fastener 1. Since the fastener 1 has the same configuration as the conventional one, the description is omitted.

Spring receiving hole 35 of first piston body 32
The driver body 50 is urged rearward by the spring S1, and the distal end portion 52A of the rod 52 is retracted into the driver hole 36.

When the compressed air is supplied to the second cylinder chamber 25S, the driver body 50 moves forward against the spring S1 due to the communication between the second cylinder chamber 25S and the inside of the second piston body 40. It is going to go. [Chuck] The chuck 70 is composed of a pair of chuck members 71 and 81 as shown in FIGS. The chuck member 71 has a base 73 that is rotatably mounted on the distal end of the cylindrical portion 33 of the first piston body 32 about a shaft 72, and a holding portion 74 formed at the front end of the base 73. are doing.

The holding portion 74 is located in front of the distal end of the cylindrical portion 33 of the first piston body 32, and has an arc-shaped concave portion 75 formed inside the holding portion 74. At the front end of the holding portion 74, a front wall portion 76 protruding inward is formed.
Between the end surface 76A and the concave portion 75 is an inclined surface 77 inclined inward. The chuck member 81 has the same configuration, and the chuck members 71 and 81 are urged by springs (not shown) in the direction opposite to the arrow. Then, the holding portion 74 of the chuck member 71 and the chuck member 8
A substantially half-cylindrical portion is formed with the first holding portion 84,
The lower portion of the half-cylinder portion is open, and this opening forms an insertion port 90 for inserting the head 4 a of the screw 4 of the fastener 1. Also, the front surface of the half-cylinder portion is in an open state, and the fastener 1 is driven out from the front surface.

Then, as shown in FIG. 8, the head 4a of the screw 4 of the fastener 1 is inserted from below into the holding portion 7 through the insertion opening 90.
When pushed toward the concave portions 75, 85 of 4,84,
The chuck members 71, 81 rotate around the shafts 72, 72 in the direction of the arrow. By this rotation, the chuck member 71,
As shown in FIG. 9, the holding portions 74 and 84 of the screw 81 open right and left, and the head 4a of the screw 4 enters the concave portions 75 and 85. When the head 4a of the screw 4 completely enters the recesses 75, 85, the chuck members 71, 81 are closed by the urging force of the spring, and the head 4a of the screw 4 is moved to the chuck members 71, 8.
The holding portions 74 and 84 are sandwiched. That is, the fastener 1 is held by the chuck members 71 and 81 as shown in FIGS.

Holders 74, 84 of chuck members 71, 81
The head 4a of the screw 4 held at the
When the screw 4 is moved forward by being hit by A,
As the screw 4 advances, the chuck members 71, 81 are rotated as shown in FIG. 9 by the inclined surfaces 77, 87 of the holding portions 74, 84, and the holding portions 74, 84 are expanded. Due to this expansion, the head 4a of the screw 4 comes off the holding portions 74, 84 of the chuck members 71, 81, and the fastener 1 is driven forward. [Feeding Mechanism] As shown in FIGS. 1 and 2, the feeding mechanism 100 includes a guide holding portion 120 provided at a front end of the base 12.
A pair of guide members 101, 101 for guiding the connected fastener 1 to the chuck 70, and a feed member 102 for feeding the chuck 70 by vertically moving the connected uppermost fastener 1 as shown in FIG. And a driving unit 130 (see FIG. 4) provided on the guide holding unit 120 to move the feed member 102 up and down.

The guide members 101, 101 extend vertically and have an L-shaped cross section. As shown in FIG. 11, the guide portions 101A, 10 have front ends protruding inward.
1A. The cylindrical portion 3 of the fastener 1 enters between the guide portions 101A, 101A, and the guide portions 101A, 1A.
01A presses the front surface of the flange 2 of the fastener 1.

As shown in FIG. 1, the guide member 101 is provided with a stopper 115 for preventing the fastener 1 from dropping. The stopper 115 moves the shaft 11 from the position shown in the figure.
6, and is urged counterclockwise by a spring (not shown). When the fastener 1 moves upward, the stopper 115 rotates clockwise while being pressed by the fastener 1 against the urging force of the pulling, and the rotation allows the fastener 1 to move upward. When the fastener 1 having rotated the stopper 115 rises to a predetermined position, the stopper 115 comes off the fastener 1 and returns to the position shown in FIG. 1 by the urging force of the spring, thereby preventing the fastener 15 from dropping. . [Driving Means] The driving means 130 includes a cylinder 103 (see FIG. 4) provided on the guide holding portion 120 and the cylinder 1
03, a piston 104 which moves up and down,
And a piston rod 104R that moves up and down together with the piston rod 104. The piston 104 is always urged upward by the spring S2. The cylinder 103 communicates with the grip chamber 13 via the trigger valve 15.

A plate 140 is attached to the lower part of the piston rod 104R.
40 is provided with a shaft 107 shown in FIG. The lower portion of the feed member 102 is pivotally supported by a shaft 107, and the feed member 102 can rotate back and forth by a predetermined angle about the shaft 107.

The feed member 102 is connected to the guide member 10.
The piston 104 moves up and down along the guide members 101 due to the vertical movement of the piston 104.

As shown in FIGS. 12 and 13, a pair of support portions 105 for supporting the flange 2 of the fastener 1 and a support portion 106 for supporting the head 4a of the screw 4 of the fastener 1, as shown in FIGS. Are provided. The front end face of each of the support portions 105 and 106 has an inclined surface 1 facing downward.
05a and 106a. A projection 110 extending rearward is formed below the feed member 102, and a spring 112 is provided between the feed member 102 and a spring receiving portion 111 provided on the plate 140. It is urged counterclockwise around 107.

When the feed member 102 is lowered from the position shown in FIG.
Of the fastener 1 is the flange 2 of the fastener 1.
And the head 4a of the screw 4 comes into contact with the support member 105, 10 while the feed member 102 is rotated clockwise against the urging force of the spring 112 as it descends.
6 moves under the fastener 1 at the top. When the support portions 105 and 106 of the feed member 102 move below the uppermost fastener 1, the feed member 102 rotates counterclockwise by the urging force of the spring 112, and the support portions 105 and 106 of the feed member 102 move. Is the flange 2 of the top fastener 1 and the head 4 of the screw 4 as shown in FIG.
The lower side of a is supported.

From this state, when the feed member 102 rises, the support portions 105 and 106 of the feed member 102 feed the uppermost fastener 1 into the chuck 70.

The switching valve 15 is provided in the guide holding portion 120.
0, the spool 151 of the switching valve 150 moves up and down.
Rises, the space 24Sd of the main cylinder body 21 communicates with the outside air, and when the spool 151 descends, the grip chamber 13 communicates with the space 24Sd. Further, the spool 151 is urged downward by a spring 153 and moves up and down by the up and down movement of the feed member 102. [Operation] Next, the operation of the fastener driving machine configured as described above will be described.

When the fastener 1 is held by the chuck 70 and is in a standby state as shown in FIGS. 1 to 3, the spool 151 of the switching valve 150 is raised as shown in FIG. 24Sd is communicated with the outside air. The first cylinder chamber 24S of the main cylinder body 21 and the grip chamber 13 are communicated, and the piston body 30 is moving forward.

In this state, the fastener 1 held by the chuck 70 is inserted into a predetermined hole as shown in FIG. 20, and the trigger 14 is pulled. Then, the spool 1 of the trigger valve 15
5P retreats to the position shown in FIG. 14, and the grip chamber 13 and the second cylinder chamber 25 of the second cylinder 25 are moved.
S communicates. Then, the compressed air is supplied to the second cylinder chamber 2
5S, and the communication between the second cylinder chamber 25 and the inside of the second piston body 40 causes the compressed air to drive the driver body 50 into the spring S1 as shown in FIG.
Move forward against By this advance, the driver body 5
The tip 52A of the 0 rod 52 hits the head 4a of the screw 4 of the fastener 1 held by the chuck 70.

As a result of this impact, the head 4 a of the screw 4 comes off the chuck 70, and the screw 4 enters the cylindrical portion 3 of the fastener 1. That is, the fastener 1 is driven as shown in FIG.

On the other hand, the spool 15P of the trigger valve 15
As shown in FIG. 14, the cylinder 103 communicates with the grip chamber 13 via the trigger valve 15, and compressed air is supplied to the cylinder 103. Therefore, the piston 104 descends, and the feed member 102 descends to a predetermined position by the descending of the piston 104.
When the feed member 102 is lowered to a predetermined position, the support portions 105 and 106 of the feed member 102 are moved to the flange 3 of the top fastener 1 and the head 4a of the screw 4 as shown in FIG.
Will support the lower side.

Further, during the lowering of the piston 104, the spool 151 of the switching valve 150 is lowered to the position shown in FIG. 14, and the grip chamber 13 and the space 24Sd of the main cylinder body 21 communicate with each other. By this communication, compressed air is supplied to the space 24Sd.

Here, when the trigger 14 is returned (turned off), the compressed air in the second cylinder chamber 25S is exhausted,
Due to the area difference between the front surface (the surface on the space 24Sd side) and the rear surface (the surface on the first cylinder chamber 24S side) of the piston portion 31, the piston body 30 moves rearward as shown in FIG. This operation is completed before the operation of the switching valve 150 associated with the rise of the piston 140 starts.

Then, the off state of the trigger 14 is continued, and as shown in FIG.
5P returns to the original position, and the cylinder 103
And the cylinder 13 is in the exhaust state. Therefore, the piston 104 moves upward by the spring S2.

When the piston 104 rises, the feed member 1
02 rises and the top fastener 1 is fed into the chuck 70, and the fastener 1 is
1,81.

On the other hand, when the piston 104 rises, the spool 151 of the switching valve 150 rises, and the space 24Sd of the main cylinder body 21 communicates with the outside air. On the other hand, the first cylinder chamber 24S of the main cylinder body 21 is
3, the second piston body 40 of the piston body 30 moves forward in the first cylinder 24. That is, the piston body 30 moves forward.

As the piston body 30 moves forward, the fastener 1 held by the chuck 70 is cut off from the connected fastener, moved to the position shown in FIGS. 1 and 2, and enters a standby state.

According to the above embodiment, since the driver body 50 is disposed in the first piston body 32, the size of the main body 20 can be reduced. Also, the second
Since the piston body 40 moves back and forth while being guided by the guide groove 26G of the guide member 26, the first piston body 32
That is, the piston body 30 is prevented from rotating in the first cylinder 24 when moving in the front-rear direction. For this reason, the insertion opening 90 (see FIGS. 8 and 9) of the chuck 70 can always be kept directly downward, and the fastener 1 can be reliably fed into the chuck 70, and the orientation of the insertion opening 90 changes. Of the fastener 1 is prevented from being caused by the above.

Further, since the guide member 26 is attached to the rear wall 25B of the second cylinder 25 by the screw N1, the attachment position of the second piston body 40 with respect to the first piston body 32 (position with respect to the axis) is shifted. When the insertion port 90 of the chuck 70 is not directed downward, if the screw N1 is loosened and the first piston body 32 is rotated so that the insertion port 90 of the chuck 70 is directed downward, the first piston body 32 and the first piston body 32 are rotated together. When the second piston body 40 and the guide member 26 rotate and the screw N1 is tightened at the rotation position to fix the guide member 26, the insertion port 90 of the chuck 70 is always provided.
Can be pointed directly below.

That is, regardless of the displacement of the mounting position of the second piston body 40 with respect to the first piston body 32,
The piston body 30 can be attached to the main cylinder body 21 with the insertion port 90 of the chuck 70 always facing directly downward. [Second Embodiment] FIG. 19 shows a fastener driving machine 200 according to a second embodiment. The fastener driving machine 200 has a first piston body 32 for preventing the first piston body 32 from rotating. A rectangular parallelepiped block for preventing rotation (rotation preventing member) 201 is attached to the tip of the body 32. The lower surface of the block 201 is the guide holding unit 1
The first piston body 32, that is, the piston body 30 is prevented from rotating by contacting the upper surface of the piston 20.

According to the second embodiment, it is not necessary to provide the guide member 26 of the first embodiment in the second cylinder 25, so that the size of the main cylinder body 21 can be reduced. It is possible to further reduce the size of the fastener driving machine 10 of the embodiment.

[0051]

According to the present invention, the driver is provided in the piston so as to be movable in the front-rear direction.
The size of the fastener driving machine can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a fastener driving machine according to the present invention.

FIG. 2 is a longitudinal sectional view of the fastener driving machine shown in FIG.

FIG. 3 is a longitudinal sectional view showing a configuration of a main body of the fastener driving machine shown in FIG.

FIG. 4 is a schematic explanatory view showing a flow path of a fastener driving machine through which compressed air flows.

FIG. 5 is a plan view showing a chuck.

FIG. 6 is a side view showing the chuck shown in FIG. 5;

FIG. 7 is a perspective view showing a chuck member of the chuck.

FIG. 8 is a front view showing a chuck.

FIG. 9 is a perspective view of a state in which the chuck member is rotated, as viewed from below.

FIG. 10 is an explanatory view showing a feeding member.

FIG. 11 is an explanatory diagram showing a relationship between a guide member and a fastener.

FIG. 12 is a rear view showing a relationship between a feeding member and a fastener.

FIG. 13 is a side view showing a relationship between a feeding member and a fastener.

FIG. 14 is a schematic explanatory view showing a flow path of compressed air when a spool of a trigger valve is retracted.

FIG. 15 is an explanatory view showing a state in which the driver body has moved forward.

FIG. 16 is a schematic explanatory view showing a flow path of compressed air when the driver body moves forward.

FIG. 17 is an explanatory view showing a state in which the piston body 30 is retracted.

FIG. 18 is a schematic explanatory view showing a flow path of compressed air when the piston body 30 is retracted.

FIG. 19 is an explanatory view showing a fastener driving machine according to a second embodiment.

FIG. 20 is a side view showing the fastener.

FIG. 21 is an explanatory view showing a state in which a sheet is fixed with a fastener.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fastener 3 Tube part 4 Screw 21 Main cylinder (cylinder) 30 Piston body 50 Driver body 70 Chuck

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) F15B 15/14 350 F15B 15/14 350 (72) Inventor Michio Yamashita 6-6 Nihonbashi Hakozakicho, Chuo-ku, Tokyo No. Max Co., Ltd. F term (reference) 3H081 AA03 BB03 CC05 CC23 DD13 EE23

Claims (5)

[Claims] 1. A piston body which is provided in a cylinder so as to be movable in the front-rear direction and has a front end projecting forward from the front end of the cylinder, and a connecting body provided at the front end of the piston body and connecting a plurality of fasteners. A chuck for holding the separated fastener, and a driver body for driving the shaft member having one end inserted into the tubular portion of the fastener into the tubular portion and removing the fastener from the chuck, and driving the shaft member by the driver body. Afterwards, the chuck retracts the piston body at one end of the connected body by retracting to the rear, and then the fastener held by the chuck is separated from the connected body by the fastener body when the piston body moves forward. Fastener, wherein the driver body is provided in the piston body so as to be movable in the front-rear direction. -Driving machine. 2. The piston body is provided in a cylinder so as to be movable in the front-rear direction. The piston body projects forward from the piston and forms a sub-cylinder therein. The driver body has a sub-piston provided in the sub-cylinder so as to be movable in the front-rear direction, and a rod provided to the sub-piston. The fastener driving machine according to claim 1, characterized in that: 3. The fastener driving machine according to claim 1, wherein a guide means for guiding the movement of the piston body in the front-rear direction and preventing rotation around the axis is provided in the cylinder. 4. The guide means has a guide groove extending in the front-rear direction and has a guide member provided in the cylinder, and a projection provided on the piston body and engaging with the guide groove. The said guide member can be fixed at an arbitrary angle in the direction around the axis of the cylinder.
Fastener driving machine as described in. 5. The fastener driving device according to claim 1, wherein a rotation preventing member for preventing rotation of the piston body around an axis is provided at a portion of the piston body protruding from the cylinder. Machine.