JP2023000469A - work machine - Google Patents

Abstract

To provide a work machine which realizes a simple structure while securing durability.SOLUTION: A nail driver (a work machine) includes: an ejection part which ejects a nail; a striking part which strikes the nail; a magazine part 45 which supports the nail in a manner that the nail may slide in a first direction; a feeder part 46 which biases the nail to one side in the first direction; and a handle arm 42 which connects a handle part 19 with the magazine part 45. The magazine part 45 has: a large diameter part 45a; and a small diameter part 45b. A first bolt 44 for fixing the handle arm 42 is arranged at a position spaced away from a centroid 45e by a shorter distance than a distance L3 between a virtual plane 45d including a large diameter part side surface 45c and the centroid 45e of the magazine part 45. Further, the magazine part 45 has: a first nail rail 64 where a second rail side end surface contacts with the nail; and a second nail rail 65 where a first rail side end surface contacts with the nail.SELECTED DRAWING: Figure 5

Description

The present invention relates to a work machine such as a nailer.

A known example of a working machine is a nailing machine that hits a fastener by driving a piston with compressed air. As an example of such a nailer, a nailer having a structure in which a handle portion connected to the nailer main body and a magazine portion capable of accommodating a plurality of connected fasteners are connected via a handle arm. A machine is described in US Pat.

Japanese Patent Application Laid-Open No. 2004-202674

In the nailing machine described in Patent Document 1, the magazine portion has a large diameter portion and a small diameter portion, and the handle arm is fixed to the side surface of the large diameter portion of the magazine portion with a bolt. That is, the handle arm was fixed to the magazine part at a position away from the center of gravity of the magazine part, and as a result, the rotational moment of the magazine part against the vibration of the nailing machine main body during nailing increased and propagated to the bolt. Vibrations were getting louder. In order to suppress loosening of the bolts due to vibration, large bolts are used and washers are provided to reinforce the fastening parts. increased, leading to increased manufacturing costs. Therefore, it has been desired to suppress the loosening of the bolt that fixes the handle arm and the magazine section with a simple structure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a work machine that achieves a simple structure while ensuring durability.

A work machine according to one embodiment includes an ejection section for ejecting a fastener, an impact section for impacting the fastener positioned in the ejection section, a body section for accommodating the impact section, and a body extending in a first direction. a magazine portion having one end in the first direction attached to the injection portion and supporting the stopper so as to be movable in the first direction; and the magazine portion being movable in the first direction. and a feeder portion that biases the stopper toward the one side in the first direction; and a connecting portion that connects the body portion and the magazine portion, wherein the magazine portion In a cross-sectional view perpendicular to the direction, an accommodating portion that accommodates the feeder portion, and a length in a second direction perpendicular to the first direction that is smaller than that of the wide portion, and in the first direction and the second direction. and a protruding portion located on one side of the wide portion in a third direction orthogonal to the magazine portion, and the magazine portion is located at a position closer to the center of gravity than a virtual plane including the end surface of the accommodating portion in the second direction. and a first bolt for fixing the connection portion.

ADVANTAGE OF THE INVENTION According to this invention, a simple structure can be implement|achieved, ensuring the durability of a working machine.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view which shows the nailing machine which is an example of the working machine of embodiment of this invention. It is the external view which looked at the nailing machine shown in FIG. 1 from the lower surface side. FIG. 2 is a front view showing the structure of the nailing machine shown in FIG. 1; FIG. 2 is an exploded view showing the structure of the nailing machine shown in FIG. 1; 2 is an enlarged partial cross-sectional view showing the structure of the nailing machine shown in FIG. 1 cut along line AA; FIG. FIG. 2 is a side view showing the internal structure of the nailing machine shown in FIG. 1 with a part cut away; 7 is an enlarged cross-sectional view showing the structure of the nailing machine shown in FIG. 6 taken along line BB. FIG. 7 is a view in the direction of arrow C showing the structure of the nailing machine shown in FIG. 6. FIG. It is a side view which shows the structure of the magazine part of the nailing machine shown in FIG. FIG. 10 is an enlarged cross-sectional view showing the structure of the magazine section shown in FIG. 9 taken along line DD; 10 is an enlarged cross-sectional view showing the structure of the magazine section shown in FIG. 9 taken along line EE. FIG. FIG. 10 is a partial cross-sectional view showing the structure of the head guide portion and the nail rail of the magazine portion shown in FIG. 9, where (a) is the structure cut along line DD in FIG. 9, and (b) is EE in FIG. 9; It is a structure cut by a line. FIG. 2 is an external view of the magazine section of the nailing machine shown in FIG. 1 as viewed from above; 14 is a partially enlarged view showing the structure of the F portion shown in FIG. 13; FIG. FIG. 10 is a sectional view showing the structure of the nail rail and the feeder section by cutting the magazine section shown in FIG. 9 along line DD; FIG. 10 is a sectional view showing the structure of the nail rail and the feeder section by cutting the magazine section shown in FIG. 9 along line EE; It is a partial plan view which shows the structure of the nail rail of the modification of this Embodiment, (a) is a 1st modification, (b) is a 2nd modification. FIG. 10 is a partial cross-sectional view showing the structure of the head guide portion and the nail rail in a third modification of the present embodiment, where (a) is the structure cut along line DD in FIG. 9, and (b) is the structure shown in FIG. The structure is cut along the EE line. 10A is a partial cross-sectional view showing the structure of the head guide portion and the nail rail in a fourth modification of the present embodiment, FIG. The structure is cut along the EE line.

A work machine according to the present embodiment will be described with reference to the drawings. In this embodiment, a nailing machine will be described as an example of a working machine. The same or equivalent elements shown in each figure are given the same reference numerals.

A nailing machine 10 of the present embodiment shown in FIGS. 1 to 6 has a housing 11 (main body), an injection section 12, a striking section 13, a trigger 14 and a push lever 15. As shown in FIG. The housing 11 has a hitting part accommodation part 18 , a handle part 19 and a head cover 20 . The striking part housing portion 18 is cylindrical (see FIG. 3), and the handle portion 19 is connected to the striking portion housing portion 18 . The head cover 20 is fixed to one longitudinal end of the striking portion housing portion 18 and closes the opening of the striking portion housing portion 18 . The injection part 12 is also called a nose and is fixed to the other longitudinal end of the striking part accommodating part 18 . A plug 21 is provided on the handle portion 19 and an air hose is connected to the plug 21 .

Further, a cylinder 22 is provided inside the striking portion accommodating portion 18 . The cylinder 22 is movable relative to the housing 11 in the direction along the centerline A1. A centerline A1 is the centerline of the cylinder 22 . The striking part 13 is arranged over the inside and outside of the cylinder 22 . The striking part 13 is operable with respect to the cylinder 22 in the direction along the center line A1. A pressure accumulating chamber 23 is provided throughout the handle portion 19 , the striking portion accommodating portion 18 , and the head cover 20 . Compressed air supplied from the air hose is accumulated in the pressure accumulation chamber 23 .

The head cover 20 also has a passageway 24 and an exhaust valve chamber 26 . Passage 24 is connected to the outside of housing 11 . Further, a mount portion 27 is attached to the head cover 20 . Mount portion 27 has passages 28 and passages 29 . Passageway 29 is connected to passageway 24 via passageway 28 . Mount portion 27 supports exhaust valve 30 . The exhaust valve 30 is movable relative to the mount portion 27 in the direction along the center line A1. When the exhaust valve 30 operates, the passage 29 is opened and closed.

A valve seat 31 is attached to the mount portion 27 . The valve seat 31 is made of synthetic rubber and has a piston upper chamber 32 . The piston upper chamber 32 communicates with the passageway 29 .

The striking portion 13 is housed in a cylindrical striking portion housing portion 18 and has a piston 33 and a driver blade 34 . Piston 33 is provided within cylinder 22 and is operable relative to cylinder 22 in a direction along center line A1. The pressure in the piston upper chamber 32 forces the piston 33 away from the valve seat 31 in the direction along the center line A1. A seal member 25 is attached to the outer peripheral surface of the piston 33 . The seal member 25 contacts the inner peripheral surface of the cylinder 22 . A driver blade 34 attached to the piston 33 is a member that moves toward the side of the protruded fastener in the direction along the center line A1 and strikes the nail (fastener) 16 (see FIG. 10) positioned in the injection section 12. .

As shown in FIG. 6 , a piston lower chamber 35 is provided between the piston 33 and the ejection portion 12 in the direction along the center line A1 inside the cylinder 22 . The seal member 25 seals the piston lower chamber 35 . Also, a return air chamber 36 is provided between the striking portion accommodation portion 18 and the cylinder 22 . Passages 37 and 38 are provided that penetrate the cylinder 22 in the radial direction. Furthermore, a check valve 41 is provided on the outer peripheral surface of the cylinder 22 . The check valve 41 is actuated by the pressure inside the cylinder 22 and opens and closes the passage 37 . A passage 38 connects the piston lower chamber 35 and the return air chamber 36 . The passageway 38 is arranged between the passageway 37 and the injection section 12 in a direction along the centerline A1.

A bumper 39 is provided inside the cylinder 22 . The bumper 39 is arranged in the cylinder 22 at a position closest to the injection section 12 in the direction of the center line A1. The bumper 39 is made of synthetic rubber or silicone rubber. The bumper 39 has an axial hole 40, and the driver blade 34 can move in the axial hole 40 in the direction of the center line A1. A piston lower chamber 35 is formed between the piston 33 and the bumper 39 in the cylinder 22 .

In addition, the ejection part 12 is fixed to the striking part accommodating part 18 and has an ejection path 43 . The injection path 43 is connected to the shaft hole 40 . The driver blade 34 is movable in the axial hole 40 and the injection path 43 in the direction along the centerline A1 to eject the nail 16. As shown in FIG.

A push lever 15 is attached to the injection section 12 . The push lever 15 is operable with respect to the housing 11 and the injection section 12 in the direction along the center line A1. The push lever 15 is biased away from the housing 11 by a biasing member (not shown). When the tip of the push lever 15 is pressed against the mating member 17 (see FIG. 1), the push lever 15 can move toward the housing 11 against the biasing force of the biasing member.

Also, as shown in FIGS. 1 and 2, a magazine section 45 is attached to the nailer 10 . The magazine part 45 can accommodate a plurality of nails 16 shown in FIG. 10, which are fasteners. The magazine section 45 is supported by the ejection section 12 and the handle section 19 . That is, the magazine part 45 is a member that extends in the first direction B1, has one end in the first direction B1 attached to the ejection part 12, and supports the nail 16 so as to be movable in the first direction B1. be. The magazine section 45 is provided with a feeder section 46 and a winding spring 47 shown in FIG. Specifically, the feeder portion 46 is a member that is supported by the magazine portion 45 so as to be movable in the first direction B1, and that urges the nail 16 toward one side (ejection portion side) in the first direction B1. be. Then, the coil spring 47 urges the nail 16 toward the injection section 12 side in the first direction B1 via the feeder section 46 . That is, the feeder section 46 feeds the nail 16 to the injection path 43 by the biasing force of the coil spring 47 .

Further, as shown in FIG. 4, the nailing machine 10 is provided with a handle arm 42 that connects the handle portion 19 and the magazine portion 45 as a connecting portion.

Next, an example of the operation of the nailing machine 10 when driving the nail 16 into the counterpart material 17 using the nailing machine 10 will be described. As shown in FIG. 1, when the user applies an operating force to the trigger 14 and pushes the push lever 15 against the mating member 17, the pressure in the pressure accumulation chamber 23 shown in FIG. It is transmitted to the upper chamber 32, and the piston 33 and the driver blade 34 descend. The driver blade 34 then hits the nail 16 (see FIG. 10). The hammered nail 16 is driven into the mating member 17.例文帳に追加

When the seal member 25 moves between the passage 37 and the bumper 39 while the striking portion 13 is descending, the check valve 41 is operated by the pressure of the compressed air flowing into the cylinder 22 to open the passage 37 . A portion of the compressed air in the cylinder 22 therefore flows through the passage 37 into the return air chamber 36 . As a result, when the striking portion 13 descends and the piston 33 collides with the bumper 39 , the bumper 39 absorbs part of the kinetic energy of the striking portion 13 . Also, the striking part 13 stops at the bottom dead center. When the striking portion 13 stops at the bottom dead center, the piston 33 is pressed against the bumper 39 and blocks the inside of the cylinder 22 from the shaft hole 40 .

When the striking part 13 strikes the nail 16 into the mating member 17 and the push lever 15 separates from the mating member 17, the push lever 15 is actuated by the biasing force of the biasing member (not shown) and stops at the initial position. Then, the compressed air in the exhaust valve chamber 26 is discharged to the outside. Furthermore, the exhaust valve 30 operates to connect the passage 29 and the passage 28, and the compressed air in the piston upper chamber 32 is discharged to the outside. When the pressure in the piston upper chamber 32 drops, the piston 33 rises due to the pressure of the compressed air supplied from the return air chamber 36 to the piston lower chamber 35 . Then, the piston 33 comes into contact with the valve seat 31, and the striking portion 13 stops at the top dead center.

Next, the detailed structure of the magazine section and the fixing structure of the magazine section in the nailing machine 10 of the present embodiment will be described. As shown in FIG. 5, the magazine section 45 has a housing section 45a housing the feeder section 46 and a projecting section 45b housing the nail leg (part) 16a of the nail 16. As shown in FIG. The feeder section 46 includes a coil spring 47 fixed at one end to the ejection section 12 shown in FIG. 1, and a feeder member 46a that is integral with the coil spring 47 and movable in the first direction B1. The accommodating portion 45a has a substantially trapezoidal cross-sectional structure taken along the striking direction C1, and accommodates the feeder portion 46 and the coil spring 47 therein. In addition, the storage portion 45a includes the side surfaces of the storage portion 45a arranged on both sides of the magazine center line A2 (hereinafter, these side surfaces are referred to as storage portion side surfaces 45c) and the storage portion 45a arranged on the upper side (handle portion 19 side). and an upper surface of the portion 45a (hereinafter, this upper surface is referred to as a housing portion upper surface 45i). Further, the housing portion 45a connects the housing portion side surface 45c and the protruding portion 45d, and is located on the bottom side of the housing portion 45a on the side opposite to the handle portion 19 side in the third direction B3 (hereinafter referred to as the bottom surface). (referred to as a housing bottom surface 45f). As shown in FIG. 2, the accommodation portion bottom surface 45f extends from an exit portion side end (one side end) 45g in the first direction B1 to a rear end side end (other side end) 45h in the first direction B1. It is flat throughout. In the nailing machine 10, a handle arm 42 connecting the handle portion 19 and the magazine portion 45 is fixed to the bottom surface 45f of the wide portion by a first bolt 44. As shown in FIG. Specifically, the bent portion 42a of the handle arm 42 is fixed to the wide portion bottom surface 45f by a first bolt 44 and a nut 48. As shown in FIG. That is, the first bolt 44 that fixes the magazine portion 45 and the handle arm 42 is attached to the wide portion bottom surface 45f. The handle arm 42 is fixed to the wide portion bottom surface 45f by three first bolts 44. As shown in FIG.

Here, in the nailing machine 10 of the present embodiment, the center of gravity 45e of the magazine section 45 is on the magazine center line A2 near the connecting section between the housing section 45a and the projecting section 45b. The first bolt 44 is arranged at a position closer to the center of gravity 45 e of the magazine section 45 than the distance between the center of gravity 45 e of the magazine section 45 and the imaginary plane 45 d including the housing section side surface 45 c (second direction end surface). More specifically, assuming that a straight line passing through the center of gravity 45e of the magazine section 45 and orthogonal to the virtual plane 45d including the housing section side surface 45c is a virtual line D1, the intersection point P1 of the virtual line D1 with the virtual plane 45d will extend from the center of gravity 45e. A first bolt 44 is arranged at a position closer than the distance to. In the fixing structure of the magazine part 45 shown in FIG. 5, the distance L3 from the intersection point P1 on the virtual plane 45d to the center of gravity 45e and the distance L1 from the center of gravity 45e to the fixing position of the first bolt 44 are compared. , distance L3>distance L1. That is, the first bolt 44 is arranged at a position closer to the center of gravity 45e than the distance L3 between the virtual plane 45d and the center of gravity 45e.

The first bolt 44 is attached to the housing bottom surface 45f so that the axial direction 44b of the first bolt 44 matches the third direction B3 and is orthogonal to the second direction B2. Note that the hitting direction C1 is also orthogonal to the second direction B2. A head portion 44a of the first bolt 44 is arranged at a position opposite to the handle portion 19 side of the coil spring 47 in the third direction B3. Specifically, the head portion 44 a of the first bolt 44 is arranged below the coil spring 47 . Furthermore, in the third direction B3, the first bolt 44 is attached at a position overlapping the center of gravity 45e. In other words, the center of gravity 45e of the magazine portion 45 is located within the length range of the first bolt 44 in the axial direction 44b in the striking direction C1.

1 and 4, the nailing machine 10 has second bolts 49a and 49b that fix the magazine section 45 and the injection section 12 together. These second bolts 49a and 49b are attached to the housing portion side surface 45c via washers 50. As shown in FIG. At that time, the second bolt 49a fixes the magazine section 45 and the ejection section 12 via the first guard 51 and the washer 50, while the second bolt 49b fixes the second guard 52 and the washer 50 therebetween. The magazine section 45 and the ejection section 12 are fixed by means of the fixing member (see section B in FIG. 4). Also, the handle portion 19 and the handle arm 42 are fixed by a bolt 53 (see A portion of FIG. 4 and FIG. 5).

A hook 54 for fixing the feeder member 46a moved to the rear end side of the magazine section 45 so as not to return to the injection section 12 side is connected to a bolt 57 and a nut 58 via a spring 55, a sleeve 56 and a washer 59. is attached to the rear end of the magazine section 45 by That is, when the magazine portion 45 is loaded with a plurality of connected nails 16, the feeder member 46a is moved to the rear end portion side of the magazine portion 45, and the hook 54 is provided so that the feeder member 46a does not return to the injection portion 12 side. , and in this state, a plurality of connected nails 16 are loaded into the magazine portion 45 . After the nails 16 are loaded into the magazine section 45, the fixation by the hooks 54 is released, so that the feeder member 46a shown in FIG. force on.

4 and 8, the magazine portion 45 abuts against the nail 16 (see FIG. 10) and the feeder portion 46 to guide the movement of the nail 16 and the feeder portion 46 in the first direction B1. It has a first nail rail (rail portion, first rail) 64 and a second nail rail (rail portion, second rail) 65 . In the magazine section 45, as shown in FIG. 4, after the magazine section 45 is mounted by inserting the first nail rail 64 and the second nail rail 65 from the rear end of the magazine section 45, the magazine section 45 is opened. A stopper 60 is attached to the rear end portion, and is fixed to the rear end portion of the magazine portion 45 by a bolt 61 and a nut 62 via a washer 63 .

According to the fixing structure of the magazine portion 45 shown in FIG. 5 of the present embodiment, the first bolt 44 that fixes the magazine portion 45 and the handle arm 42 is attached to the housing portion bottom surface 45f of the magazine portion 45. . The first bolt 44 is arranged at a position closer to the center of gravity 45 e of the magazine section 45 than the distance L 3 between the imaginary plane 45 d including the housing section side surface 45 c and the center of gravity 45 e of the magazine section 45 . Here, the distance L1 from the center of gravity 45e to the fixed position of the first bolt 44 is, for example, about 9 mm, and the distance L3 between the virtual plane 45d including the housing side surface 45c and the center of gravity 45e of the magazine section 45 is As an example, it is approximately 25 mm. A distance L2 between the center of gravity 45e and the fixed position of the first bolt 44 in the third direction B3 is, for example, approximately 2 mm. Therefore, even if the distance L2 between the center of gravity 45e and the fixing position of the first bolt 44 in the third direction B3 is added to the distance L1 from the center of gravity 45e to the fixing position of the first bolt 44, the imaginary plane 45d and the center of gravity 45e This means that the first bolt 44 is arranged at a position closer to the center of gravity 45e than the distance L3. When considering a circular imaginary area R centered at the center of gravity 45e and having a radius equal to the distance L3 between the imaginary plane 45d and the center of gravity 45e, the entire first bolt 44 is arranged within the imaginary area R.

As a result, since the position of the center of gravity 45e of the magazine part 45 is close to the fixing position of the first bolt 44, the rotational moment of the magazine part 45 against the vibration of the main body of the nailing machine 10 during nailing can be reduced. Vibration that propagates to the bolt 44 can also be reduced. As a result, the first bolt 44 can be made less likely to loosen. Since the first bolt 44 is less likely to loosen, vibration of the magazine portion 45 can also be suppressed, and the nailing machine 10 with a simple structure can be realized while ensuring durability. Furthermore, since the vibration of the magazine part 45 can be suppressed, the workability of the nailing machine 10 can be improved.

For example, when a bolt for fixing the handle arm 42 is attached to the housing portion side surface 45c, the distance between the fixing position of this bolt and the center of gravity 45e is equal to the distance L3, which is L3=approximately 25 mm. That is, the distance L1 from the center of gravity 45e to the fixing position of the first bolt 44 is far greater than the distance L3 when the first bolt 44 is attached to the housing bottom surface 45f as in the structure of the present embodiment. to small. Therefore, it is possible to reduce the rotational moment of the magazine portion 45 with respect to the vibration of the main body of the nailing machine 10 during driving, and the vibration transmitted to the first bolt 44 can also be reduced. As a result, the first bolt 44 can be made less likely to loosen.

In addition, since the first bolt 44 that fixes the handle arm 42 to the magazine portion 45 is less likely to loosen, the first bolt 44 can be made smaller. As a result, the space for arranging the first bolt 44 can also be narrowed, so that the size of the magazine section 45 can be reduced, and the size of the nailing machine 10 can be reduced.

In addition, since the rotational moment of the magazine portion 45 with respect to the vibration of the main body of the nailing machine 10 can be reduced, the vibration of the magazine portion 45 can also be suppressed. no longer needed. As a result, the number of parts in the nailing machine 10 can be reduced.

The first bolt 44 is attached so that the striking direction C1 by the striking portion 13 and the axial direction 44b of the first bolt 44 are the same. As a result, the impact from the striking portion 13 is applied in the same direction as the axial direction 44b (penetration direction) of the first bolt 44 . Therefore, it is difficult for the first bolt 44 to receive such an impact as to rotate the first bolt 44 . That is, it is possible to suppress loosening of the first bolt 44 due to impact.

Also, as shown in FIG. 5, the first bolt 44 is attached so that the head portion 44a of the first bolt 44 is arranged at a position opposite to the handle portion 19 side of the coil spring 47 in the striking direction C1. It is That is, the first bolt 44 is attached so that the head portion 44 a of the first bolt 44 is arranged below the coil spring 47 in the accommodating portion 45 a of the magazine portion 45 . Since there is a space between the coil spring 47 and the bottom surface 45f of the receiving portion, by arranging the head 44a of the first bolt 44 in this space, the dead space can be effectively utilized. The size of the nailing machine 10 can be reduced compared to the structure in which the bolt is arranged at 45c.

In the magazine section 45, the housing section bottom surface 45f extends from the ejection section side end (one side end) 45g in the first direction B1 to the rear end side end (other side end) 45h in the first direction B1. flat surface. Further, the housing portion side surface 45c is also a flat surface from one side end to the other side end. As a result, the magazine portion 45 can be formed by extrusion using a material such as aluminum.

In addition, since the first bolt 44 for fixing the handle arm 42 is attached to the bottom surface 45f of the housing portion, there is nothing that contributes to the fixation of the ejection portion 12 compared to the structure in which the first bolt 44 is attached to the side surface 45c of the projecting portion. No. That is, in the structure in which the first bolt 44 is fixed to the housing portion side surface 45c, it is necessary to change the shape of the injection portion 12 side. It contributes nothing to the fixation in the injection part 12 . Therefore, in the injection section 12, the second bolts 49a and 49b for fixing the magazine section 45 and the injection section 12 can be attached to the housing section side surface 45c.

Next, guide means for the nails 16 and the feeder portion 46 in the magazine portion 45 of this embodiment will be described.

As shown in FIGS. 9 to 11, the magazine portion 45 is provided with a rail portion that abuts against the nail 16 and the feeder portion 46 to guide the movement of the nail 16 and the feeder portion 46 in the first direction B1. there is The rail portion includes a first nail rail (first rail) 64 and a second nail which are spaced apart in a second direction B2 orthogonal to the first direction B1 and arranged so as to sandwich the nail 16 therebetween. A rail (second rail) 65 is included. As shown in FIG. 13, the first nail rail 64 is formed in a flat plate shape extending in the first direction B1 and the second direction B2, while the second nail rail 65 is also formed in the first direction B1 and the second direction B2. It is formed in a flat plate shape extending in the direction B2.

Specifically, as shown in FIG. 5, the magazine section 45 includes a housing section 45a that houses therein the feeder section 46 and the coil spring 47, and as shown in FIGS. A first nail rail 64 and a second nail rail 65 are provided side by side on the upper surface 45i. As shown in FIG. 12, the first nail rail 64 and the second nail rail 65 are provided side by side with a gap 66 therebetween. That is, as shown in FIG. 13, the longitudinal directions of the first nail rail 64 and the second nail rail 65 are substantially parallel to each other along the first direction B1. At this time, the first nail rail 64 and the second nail rail 65 are arranged with a gap 66 therebetween.

10 is arranged in the gap 66, and the end face of the first nail rail 64 on the second rail side in the second direction B2 (hereafter, this end face will be referred to as the second rail side end face) 64a) abuts nail foot 16a of nail 16. FIG. On the other hand, in the second nail rail 65, the end surface of the second nail rail 65 on the first rail side in the second direction B2 (hereinafter, this end surface is referred to as the first rail side end surface 65a) contacts the nail foot 16a of the nail 16. touch. As a result, the nail 16 is guided by the second rail side end face 64a of the first nail rail 64 and the first rail side end face 65a of the second nail rail 65 as shown in FIG. move along the first direction B1.

Further, as shown in FIG. 15, a feeder member 46a (feeder portion 46) is arranged in a gap 66 (see FIG. 12) between the first nail rail 64 and the second nail rail 65, and the first nail rail 64 in the second direction B2 is provided. A second rail side end face 64a of the nail rail 64 contacts the feeder member 46a. On the other hand, in the second nail rail 65, the first rail side end surface 65a of the second nail rail 65 in the second direction B2 contacts the feeder member 46a. As a result, the feeder member 46a is also guided by the second rail-side end surface 64a of the first nail rail 64 and the first rail-side end surface 65a of the second nail rail 65, and the second rail shown in FIG. Move along one direction B1.

As shown in FIG. 10, the nails 16 are loaded into the magazine portion 45 in a state in which a plurality of nails 16 are connected by resin-made connecting portions 16b. Therefore, in the magazine section 45, the nail 16 is guided by the second rail side end face 64a of the first nail rail 64 and the first rail side end face 65a of the second nail rail 65. , the connecting portion 16b is guided by the projecting portion 45b of the magazine portion 45. As shown in FIG. On the other hand, as shown in FIG. 15, the feeder member 46a (feeder portion 46) is such that the upper engaging portion 46b of the feeder member 46a is positioned between the second rail side end surface 64a of the first nail rail 64 and the second nail rail 65. The lower engaging portion 46c of the feeder member 46a is guided by the projecting portion 45b of the magazine portion 45. As shown in FIG.

Further, as shown in FIG. 12, the second rail side end surface 64a of the first nail rail 64 has a length in a third direction B3 orthogonal to the first direction B1 (see FIG. 9) and the second direction B2 of It is equal to the plate thickness T1 of the first nail rail 64 . That is, the second rail side end face 64a of the first nail rail 64 is the end face of the flat plate-like first nail rail 64 itself, and is the end face formed by punching by press working.

Similarly, the first rail side end surface 65 a of the second nail rail 65 has a length in the third direction B<b>3 equal to the plate thickness T<b>2 of the second nail rail 65 . That is, the first rail side end face 65a of the second nail rail 65 is also the end face of the flat plate-shaped second nail rail 65 itself, and is the end face formed by punching by press working. That is, the nail 16 and the feeder member 46a are guided and moved by the second rail side end surface 64a and the first rail side end surface 65a formed by punching by press working. Each of the first nail rail 64 and the second nail rail 65 of the present embodiment is a member formed of one plate material.

10 and 15, the first nail rail 64 is provided with a head guide portion 64b that covers the head 16c of the nail 16 and the head 46d of the feeder member 46a. Since the head guide portion 64b is provided to cover the head portion 16c of the nail 16 and the head portion 46d of the feeder member 46a, the nail 16 and the feeder member 46a are prevented from moving even when the striking portion 13 strikes. Jumping out of the magazine part 45 can be suppressed.

A plurality of standing walls 45j, 45k, 45m, and 45n that support the first nail rail 64 and the second nail rail 65 are provided on the upper surface 45i of the housing portion of the magazine portion 45. As shown in FIG. Specifically, the bent portion 64c of the first nail rail 64 is sandwiched and supported by the upright wall 45j and the upright wall 45k, and the bent portion 64c and the head guide portion 64b are positioned on the upper surface of the storage portion of the magazine portion 45. It is sandwiched and supported by 45i and bent portion 45p. Further, a pressing portion 45r for pressing the first nail rail 64 against the side opposite to the side of the head guide portion 64b (the side of the projecting portion 45b) is provided on the vertical wall 45j that supports the first nail rail 64 provided with the head portion guide portion 64b. is provided. This can prevent the first nail rail 64 from being detached from the magazine part 45 even when an impact is caused by the striking part 13 .

Further, the second nail rail 65 is supported by the bent portion 65b being sandwiched between the upright wall 45m and the upright wall 45n in the second direction B2. It is also sandwiched and supported by the portion 45q. Accordingly, as with the first nail rail 64 , it is possible to prevent the second nail rail 65 from coming off from the magazine section 45 even when an impact is caused by the striking portion 13 .

Further, as shown in FIGS. 13 and 14, a gap 66 between the first nail rail 64 and the second nail rail 65 is a narrow portion located on the side (one side) of the injection section 12 in the first direction B1. 66a, and a wide portion 66b arranged on the hook 54 side (the other side) in the first direction B1 and having a wider width than the narrow portion 66a. Further, the gap 66 includes a boundary portion 66c between the narrow portion 66a and the wide portion 66b where the width of the gap 66 gradually changes. That is, the elongated gap 66 formed along the first direction B1 is composed of a narrow portion 66a, a wide portion 66b, and a boundary portion 66c. It becomes the part 66b. As an example, the width S1 of the narrow portion 66a is S1=4.2 mm, and the width S2 of the wide portion 66b is S2=5 mm. In the wide portion 66b of the gap 66, the plurality of nails 16 connected by the connecting portion 16b are loaded. After being loaded, the plurality of connected nails 16 are pressed toward the injection section 12 by the feeder member 46a (feeder section 46) and placed in the narrow section 66a, where they are ready for driving. A head guide portion 64b of the first nail rail 64 is arranged on the narrow portion 66a. In other words, the narrow portion 66a is close to the ejection portion 12, so vibration during driving is large. 16 can be prevented from jumping out of the magazine portion 45.例文帳に追加

In addition, at the boundary portion 66c between the narrow portion 66a and the wide portion 66b, the width of the gap 66 gradually changes so that the narrow portion 66a and the wide portion 66b are connected with a smooth end face. It has a shape. For example, in plan view shown in FIG. 14, the boundary portion 66c has a trapezoidal shape in which the width of the gap 66 gradually narrows from the wide portion 66b toward the narrow portion 66a. 66a are smoothly connected without a step. That is, even when the second rail side end face 64a of the first nail rail 64 and the first rail side end face 65a of the second nail rail 65 shown in FIG. are connected by a smooth end surface by the boundary portion 66c, the second rail side end surface 64a and the first rail side end surface 65a can be formed by punching easily and with high precision.

Here, the structure shown in FIG. 10 shows the structure of the magazine section 45 cut along line DD shown in FIG. 9, and the structure shown in FIG. 11 shows the magazine section shown in FIG. The structure is shown cut at line 45 EE. Specifically, FIGS. 10 and 12A show the cross-sectional structure of the magazine portion 45 at the portion where the bent portion 45p is formed on the upper portion of the accommodating portion 45a, whereas FIGS. (b) shows a cross-sectional structure of the magazine section 45 at a portion where the bent portion 45p is not formed on the upper portion of the accommodating portion 45a. In the magazine portion 45 of the present embodiment, even in a portion where the bent portion 45p is not formed, a pressing portion 45r for pressing the first nail rail 64 downward is provided on the vertical wall 45j of the upper surface 45i of the accommodating portion. ing. This can prevent the first nail rail 64 from being detached from the magazine part 45 even when the impact from the striking part 13 occurs in a portion of the magazine part 45 where the bent part 45p is not formed.

As described above, according to the magazine portion 45 of the present embodiment, the second rail-side end face 64a of the first nail rail 64 and the first rail-side end face 65a of the second nail rail 65 are formed by punching by press working. Since the movement of the nail 16 and the feeder portion 46 (feeder member 46a) is guided, the nail 16 and the feeder portion 46 can be moved with high accuracy. That is, by arranging the second rail side end face 64a and the first rail side end face 65a punched out by press working with the gap 66 interposed therebetween, the precision of the gap 66 can be improved. By arranging the nail 16 and the feeder portion 46 in the gap 66 and guiding the movement of the nail 16 and the feeder portion 46 by the second rail side end surface 64a and the first rail side end surface 65a, the nail 16 and the feeder portion 46 are moved. It is possible to suppress rattling at the time of movement of the.

As a result, the nail 16 and the feeder portion 46 can be moved with high precision, so that the nail 16 can be driven smoothly, and the workability of the nail driver 10 can be improved.

Next, a modified example of this embodiment will be described.

17(a) and 17(b), the width of the wide portion 66b in the gap 66 between the first nail rail 64 and the second nail rail 65 is changed according to the thickness of the nail 16 and the like. be. The width S3 of the gap 66 in the first modified example shown in FIG. 17(a) is, for example, S3=6.2 mm. Further, the width S4 of the gap 66 in the second modified example shown in FIG. 17(b) is, for example, S4=7.2 mm. Thus, the width of the gap 66 between the first nail rail 64 and the second nail rail 65 can be set variously according to the thickness of the nail 16 .

In a third modification shown in FIGS. 18(a) and 18(b), a pressing portion 45r provided on a vertical wall 45j supporting the first nail rail 64 of the magazine portion 45 is arcuate. Among them, the structure shown in FIG. 18(a) shows the cross-sectional structure of the magazine portion 45 at the location where the bent portion 45p is formed on the upper portion of the accommodating portion 45a, while the structure shown in FIG. 18(b). The structure shows the cross-sectional structure of the magazine portion 45 at a portion where the bent portion 45p is not formed on the upper portion of the accommodating portion 45a. Even in a portion where the bent portion 45p of the magazine portion 45 of the third modification is not formed, a small arc-shaped pressing portion 45r that presses the first nail rail 64 downward is provided on the standing wall 45j of the upper surface 45i of the accommodating portion. is provided. This can prevent the first nail rail 64 from being detached from the magazine part 45 even when the impact from the striking part 13 occurs in a portion of the magazine part 45 where the bent part 45p is not formed.

In a fourth modification shown in FIGS. 19(a) and 19(b), a pressing portion 45r provided on a standing wall 45j supporting the first nail rail 64 of the magazine portion 45 has an inclined wall shape. Among them, the structure shown in FIG. 19(a) shows the cross-sectional structure of the magazine portion 45 at the portion where the bent portion 45p is formed in the upper portion of the accommodating portion 45a, while the structure shown in FIG. 19(b). The structure shows the cross-sectional structure of the magazine portion 45 at a portion where the bent portion 45p is not formed on the upper portion of the accommodating portion 45a. Even in a portion where the bent portion 45p of the magazine portion 45 of the fourth modification is not formed, an inclined wall-like pressing portion 45r that presses the first nail rail 64 downward is provided on the vertical wall 45j of the upper surface 45i of the accommodating portion. is provided. This can prevent the first nail rail 64 from being detached from the magazine part 45 even when the impact from the striking part 13 occurs in a portion of the magazine part 45 where the bent part 45p is not formed.

The present invention is not limited to the above embodiments, and can be modified in various ways without departing from the scope of the invention. For example, in the above embodiment, the handle arm 42 is attached to the magazine portion 45 by three first bolts 44, but the number of the first bolts 44 for fixing the handle arm 42 is three. It is not limited to books.

DESCRIPTION OF SYMBOLS 10... Nail driver (working machine), 11... Housing (body part), 12... Injection part, 13... Striking part, 14... Trigger, 15... Push lever, 16... Nail (stopper), 16a... Nail foot ( part), 16b...connecting part, 16c...head part, 17...mating member, 18...hitting part accommodating part, 19...handle part, 20...head cover, 21...plug, 22...cylinder, 23...accumulator, 24... Passage 25 Seal member 26 Exhaust valve chamber 27 Mount portion 28 Passage 29 Passage 30 Exhaust valve 31 Valve seat 32 Piston upper chamber 33 Piston 34 Driver blade , 35... Lower piston chamber 36... Return air chamber 37, 38... Passage 39... Bumper 40... Shaft hole 41... Check valve 42... Handle arm 42a... Bent portion 43... Injection path 44 First bolt 44a Head 44b Axial direction 45 Magazine part 45a Accommodating part 45b Protruding part 45c Side surface of accommodating part 45d Virtual plane 45e Center of gravity 45f Bottom of accommodating part , 45g... Injection part side end (one side end) 45h... Rear end side end (other side end) 45i... Upper surface of accommodating part 45j, 45k, 45m, 45n... Standing wall 45p, 45q... Bending Part 45r... Pressing part 46... Feeder part 46a... Feeder member 46b... Upper engaging part 46c... Lower engaging part 46d... Head 47... Winding spring 48... Nut 49a, 49b... Second bolt 50 Washer 51 First guard 52 Second guard 53 Bolt 54 Hook 55 Spring 56 Sleeve 57 Bolt 58 Nut 59 Washer 60 Stopper 61 Bolt 62 Nut 63 Washer 64 First nail rail (rail portion, first rail) 64 a Second rail side end surface 64 b Head guide portion 64 c Bent portion 65 Second nail rail (rail portion, second rail) 65a First rail side end face 65b Bent portion 66 Gap 66a Narrow portion 66b Wide portion 66c Boundary A1 Center Line A2...Magazine center line B1...First direction B2...Second direction B3...Third direction C1...Blowing direction D1...Virtual line L1, L2, L3...Distance P1...Intersection point S1, S2, S3, S4...width, T1, T2...plate thickness

Claims (8)

an injection part for injecting the stopper;
a hitting portion that hits the fastener located in the ejection portion;
a body portion that accommodates the hitting portion;
a magazine part extending in a first direction, having one end in the first direction attached to the injection part, and supporting the stopper movably in the first direction;
a feeder portion supported by the magazine portion in a state movable in the first direction and biasing the stopper toward the one side in the first direction;
a connecting portion that connects the body portion and the magazine portion;
with
In a cross-sectional view perpendicular to the first direction, the magazine portion includes an accommodating portion that accommodates the feeder portion, a length in a second direction perpendicular to the first direction that is smaller than that of the wide portion, and a projecting portion located on one side of the wide portion in a third direction orthogonal to the first direction and the second direction;
A working machine, wherein a first bolt for fixing the magazine section and the connecting section is arranged at a position closer to the center of gravity than a virtual plane including the second direction end surface of the accommodating section. The working machine according to claim 1, wherein a direction of impact by said impact portion and an axial direction of said first bolt are perpendicular to said second direction. The feeder section includes a coil spring having one end fixed to the injection section, and a feeder member integral with the coil spring and movable in the first direction,
3. The working machine according to claim 2, wherein a head portion of said first bolt is arranged at a position opposite to said handle portion side of said coil spring in said striking direction. the magazine portion includes a bottom surface of the accommodating portion extending in the second direction so as to connect the accommodating portion and the projecting portion;
The working machine according to claim 2 or 3, wherein the bottom surface of the accommodating portion is flat from one end in the first direction to the other end in the first direction. 5. The working machine according to claim 4, wherein said first bolt is attached to said bottom surface of said accommodating portion. The body portion has a hitting portion housing portion and a handle portion connected to the hitting portion housing portion,
The working machine according to any one of claims 1 to 5, wherein the connecting portion connects the handle portion and the magazine portion. a second bolt for fixing the magazine section and the ejection section;
The working machine according to any one of claims 1 to 6, wherein the second bolt is attached to the side surface of the accommodating portion. The work machine according to any one of claims 2 to 7, wherein the first bolt is attached so that its position in the third direction overlaps with the center of gravity.

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