JPH0647667Y2 - Starting safety device for nailer - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a straight line below a starting lever in the shape of an arm that transmits a contact member arranged near the tip of the nose part of a nailing machine to the starting lever. The present invention relates to a starter safety device for a nailing machine, which is arranged in the shape of a circle to ensure accurate start-up and ensure safety.

(Prior art and its problems) As a starting safety device for a nailing machine, a manually operable starting lever and a contact member that is arranged so as to project toward the tip of the nose portion and is operated by contact with a construction material surface,
A safety device is known in which the nail driving machine cannot be driven unless both operation sections are operated. The contact member is composed of a contact member that engages with a construction material that has a tubular nose portion capable of accommodating a nail and that is arranged at the tip, and an arm that transmits the operation of the contact member to the activation lever. .

In the case of a normal nail driving machine, since the feeding path of the connecting nail is formed immediately below the starting lever, the arm bypasses the nail feeding path and the nail feeding mechanism around the nose side. It is arranged in a curved shape (Act No. 58-21659).

However, if the arm is curved and arranged on the side of the nose part, it is likely to be deformed by the load from both ends, so even if the contact member is strongly pressed against the construction material surface, its movement is absorbed by the deformation of the arm. It will not be accurately transmitted to the start lever and may cause malfunction.

In addition, by adjusting and setting the top dead center position of the contact member, the nail driving machine can maintain the tip position of the nose part at a predetermined position from the surface of the construction material and set the nail driving depth. However, there is a problem in that the arm is elastically deformed by the load of pressing the nailing machine against the construction material and the distance between the tip of the nose portion and the construction material surface cannot be kept constant, and a predetermined driving state cannot be obtained.

You can increase the strength of the arm to prevent deformation,
In this case, the weight of the nail driving machine as a whole becomes large, and the operability is impaired.

(Object of the Invention) The present invention solves the above-mentioned drawbacks, in particular, without deforming the arm connecting to the contact member to the side of the nose portion, the deformation of the arm is suppressed and the correct operation of the contact member is activated. It is an object of the present invention to provide a starting safety device for a nailing machine that is transmitted to

(Means for Achieving the Purpose) In order to achieve the above object, a starting safety device for a nailing machine according to the present invention comprises a piston having a nail striking driver and a cylinder slidably accommodating the piston. A striking mechanism section, a driving section for driving the striking mechanism section, a nail ejecting section having a cylindrical nose section for slidably receiving the driver, and a connecting nail for guiding the connecting nail to the nail ejecting section. A nail feeding mechanism including a nail feeding path and a nail feeding device having a feeding claw that reciprocates along the feeding path, a starting lever rotatably supported so as to be manually operable, and a tip of the nose portion. A nailing machine comprising a contact member arranged in the vicinity and always protruding from the tip of the nose part, and a start operation part for operating the drive part composed of an arm for transmitting the operation of the contact member to a start lever, Nail supply The nail supply path of the mechanism part is formed by bending away from the nail feeding device behind the sliding range of the nail of the nail feeding device, and between the bent nail feeding path and the nail feeding device, the activation lever It is characterized in that an arm guide extending substantially linearly from below is formed, the arm is slidably arranged by the arm guide, and is connected to a contact member below the nail feeding path.

(Advantages and effects of the invention) According to the above configuration, since the nail feeding path is formed so as to be bent away from the nail feeding device at the rear of the sliding range of the feeding pawl of the nail feeding device, the feeding nail slides. In the moving range, the moving direction of the feed nail is parallel to the nail feeding path, and the feeding of the connecting nail is not impaired. Further, a space for forming an arm guide can be obtained between the bent nail feeding path and the nail feeding device. Since the arm guide extends substantially linearly below the actuating lever, the arm can be disposed below the nail feeding path without bending the arm laterally of the nose portion. Therefore, the deformation of the arm during operation is suppressed, and the operation of the contact member can be accurately and reliably transmitted to the activation lever. Further, since the volume of the arm portion which has conventionally been projected to the side surface of the nailing machine is reduced, it is possible to nail a narrower portion.

Further, even in a nailing machine equipped with a driving depth adjusting mechanism, the deformation amount of the arm is small, so that it is possible to control the driving depth with high accuracy by adjusting the stop position of the contact member.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show the outline of the cross section of the nail driver.
This nailing machine comprises a nailing machine body 1, a grip 2 and a magazine 3. The nailing machine body 1 has a striking piston 6 having a nail striking driver 5 and the striking piston 6 slid on the nailing machine body 1. A striking mechanism portion a composed of a striking cylinder 7 movably accommodated, a driving portion b for driving the striking mechanism portion a,
A nail injection part c having a tubular nose part 8 that slidably receives the driver 5, a nail feed path 10 for guiding the connecting nail 9 in the magazine 3 to the nail injection part c, and the nail feed path. A nail supply mechanism section d including a nail feeding device 12 having a feeding claw 11 reciprocating along 10 and a starting operation section e for activating the driving section b are provided.

The striking mechanism portion a is composed of a striking cylinder 7 having an open upper end, a striking piston 6 slidably arranged in the striking cylinder 7, and a driver 5 integrally connected to the striking piston 6.

The drive part b is a head valve 12 arranged to face the upper end of the striking cylinder 7 and a trigger valve 13 for controlling the head valve 12.
The head valve 12 drives the striking piston 6 by selectively connecting the inside of the striking cylinder 7 to the compressed air storage chamber 14 and the atmosphere according to the operation of the trigger valve 13.

The nail supply mechanism section d is provided between the nail ejection section c and the magazine 3. The nail supply mechanism section d is a connecting nail 15 in the magazine 3.
And a nail feeding path 10 for guiding a nail to the nail ejecting portion c.
And a nail feeding device 30 having a feeding claw 11 that reciprocates along the nail. The nail feeding device 30 accommodates the feed piston 27 having the rod 12 in the feed cylinder 26, rotatably attaches the feed pawl 11 to the tip of the feed piston 27, and the back surface of the feed piston 27 and the feed cylinder 26. A spring 16 is arranged between the rear wall and the feed cylinder 27 so that the feed piston 27 is constantly urged in the direction in which the rod 12 projects.
The feed piston 27 is reciprocated by supplying and discharging compressed air from the opening 17 near the front wall of 26. That is, the feed claw 11 retracts due to the supply of compressed air and engages with the rear end of one nail of the connecting nail 15 in the nail feed path 10, and the feed piston 27 moves in the projecting direction by the spring force during exhaust. In doing so, the feed claw 11 supplies the nail 9a at the tip of the connecting nail 15 into the nose portion 8, and the feed claw 11 retreats again by the supply of compressed air and engages with the rear end of the next nail 9b.

Next, the nail feeding path 10 of the nail feeding mechanism section d is a nail feeding device.
It is formed so as to be separated from the nail feeding device 30 behind the sliding range of the feeding claw 11 of 30. Then, between the bent nail feeding path 10 and the bent nail feeding device 30, a starting lever 18 described later is provided.
An arm guide 20 is formed that extends substantially linearly from below.

The starting operation part e rotatably supports the starting lever 18 for pushing the valve stem 21 of the trigger valve 13 of the drive part b into the nailing machine body 1 and operates it at all times near the tip of the nose part 8. The contact member 22 protruding from the tip of the nose portion 8 and the operation of the contact member 22 are actuated by a lever.
The arm 23 is arranged to be slidable through the arm guide 20. The arm 23 extends slidably on the upper side, the L-shaped piece 24 is coupled to the upper end, and the L-shaped piece 24 is coupled to the lower part. It bends along the nose portion 8 below the nail feeding path 10 and is integrally connected to the contact member 22. Also,
A spring 28 is provided between the upper end of the arm 23 and the nailing machine body 1.
And the arm 23 is constantly urged downward by the spring 28. The upper end of the L-shaped piece 24 is arranged to face the free end of the contact lever 25 pivotally supported by the starting lever 18.

In the above structure, when the contact member 22 is pressed against a construction material (not shown), the arm 23 moves relative to the nailing machine body 1 and the L-shaped piece 24 at the upper end pushes up the contact lever 25. When the activation lever 18 is further rotated, the contact lever 25 pushes the valve stem 21 of the trigger valve 13 to operate the trigger valve 13, and the head valve 12 compresses the inside of the striking cylinder 7 in response to the operation of the trigger valve 13. The air storage chamber 14 and the atmosphere are selectively connected to drive the striking piston 6 and the driver 5 drives the nail in the nose portion 8 by driving.

As described above, since the nail feeding path 10 is formed by bending so as to be separated from the nail feeding device 30 behind the sliding range of the feeding pawl 11 of the nail feeding device 30, in the sliding range of the feeding pawl 11. Is parallel to the moving direction of the feed claw 11 and the nail feeding path 10.
The feeding of the connecting nail 15 is not impaired. Further, the arm guide 20 is provided between the bent nail feeding path 10 and the bent nail feeding device 30.
Can be obtained. Arm guide
Since 20 extends substantially linearly below the starting lever 18, the arm 23 does not bend to the side of the nose portion 8 without bending the nail feeding path.
It can be placed below 10. Therefore, the deformation of the arm 23 during the operation is suppressed, and the operation of the contact member 22 can be accurately and reliably transmitted to the activation lever 18.
Further, since the volume of the arm 23 portion which has conventionally been projected to the side surface of the nailing machine is reduced, it is possible to nail a narrower portion.

Further, even in a nailing machine equipped with a driving depth adjusting mechanism, since the deformation amount of the arm 23 is small, it is possible to control the driving depth with high accuracy by adjusting the stop position of the contact member 22. Become.

[Brief description of drawings]

1 is a vertical sectional view of a nailing machine including a starting safety device according to the present invention, and FIG. 2 is a sectional view taken along line XX of FIG. Reference symbol a ... Striking mechanism section, b ... Driving section, c ... Nail ejection section, d ... Nail supply mechanism section, e ... Starting operation section, 5 ... Driver, 6 ... Striking piston, 7 ... Striking cylinder, 8
…… Nose part, 18 …… Starting lever, 20 …… Arm guide, 22 …… Contact member, 23 …… Arm, 30 …… Nail feed device

Claims (1)

[Scope of utility model registration request] 1. A striking mechanism section comprising a piston having a nail striking driver and a cylinder slidably accommodating the piston, a drive section for driving the striking mechanism section, and a slidable driver. A nail injection unit having a tubular nose part for receiving, a nail feeding device provided with a nail feeding path for guiding a connecting nail to the nail emitting section, and a feeding claw reciprocating along the feeding path. A nail supply mechanism, a starting lever that is rotatably supported so that it can be manually operated, a contact member that is arranged in the vicinity of the tip of the nose portion, and that constantly projects from the tip of the nose portion A nailing machine comprising a starting operation section for activating the drive section configured by a transmitting arm, the nail feeding path of the nail feeding mechanism section being fed behind the nail sliding range of the nail feeding device. Away from the device An arm guide extending substantially linearly from below the actuating lever is formed between the bent nail feeding path and the bent nail feeding device, and the arm is slidably arranged by the arm guide. In addition, a starting safety device for a nailing machine, characterized in that it is combined with a contact member below the nail feeding path.