JP2017087368A - Gas type implantation tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas type implantation tool that has a battery integrally provided to a body so as to supply power to an ignition plug or an agitation fan and that is capable of improving protection against erroneous use/illegal use after the removal of a magazine.SOLUTION: A magneto-sensitive switch 38 is arranged as a non-contact switch at the part of the inside of a body 1 close to a magazine 2. A magnet 40 is arranged inside the magazine 2. In the attached state of the magazine 2, the magneto-sensitive switch 38 is ON to conduct power to a power system such as an ignition plug 14. When the magazine 2 is removed, the magneto-sensitive switch 38 is turned OFF to cut off the power conducted to the power system. Thus, fasteners cannot be implanted even when the locking of a mechanical safety device is released.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a driving tool (such as a nailing machine or a hammering machine) in which a bar-shaped fastener is driven out by a combustion pressure of gas.

  Tools for punching bar fasteners such as nails and pins (pins) use compressed air as a power source (pneumatic driving tool) and tools that use cartridge-filled gas as a power source (gas driving tool) And are the most widespread. In any case, a large number of fasteners are connected to the magazine in a connected state, and the magazine is generally detachable from the main body.

  Among these, the pneumatic driving tool has a problem that it is inferior in mobility because a compressor is required and a hose is connected. On the other hand, the gas-type driving tool has an advantage that it does not require a compressor or a hose and has excellent maneuverability. In both cases, the fastener is fired when the trigger is pulled, but a mechanical safety device is provided to hold the fastener so that the fastener will not fire unless the tip nose is pressed against the work and retracted.

  Therefore, in view of the possibility of misuse or unauthorized use, it can be said that the air-type driving tool cannot be driven when the hose is removed. On the other hand, since the gas type has a built-in power source, strong safety measures are required. With respect to this point, as described in, for example, Patent Document 1, various measures have been conventionally taken so that the mechanical safety device cannot be unlocked.

  On the other hand, in the gas type driving tool, the gas is ignited by an electric spark plug. Therefore, a battery is used as a power source, and in Patent Document 1, the grip portion of the main body is used as a battery storage portion. On the other hand, as in Patent Document 2, a battery is loaded in a magazine. In a gas driving tool, an electric stirring fan is usually arranged in the combustion chamber, and the electric fan is also driven by a battery power source. In addition, the supply of fuel gas is also controlled by a solenoid valve. In this case, a power source for driving the solenoid valve is also required. Therefore, there is a case where a battery as a power source is required other than the spark plug.

Japanese Patent Laid-Open No. 2005-1110 JP 2008-200288 A

  Whether the battery is loaded into the main unit or the magazine is a design issue defined by the relationship between space and design, but when the battery is loaded into the main unit, the contact of the power line contact between the magazine and the main unit Since there is no situation where it becomes impossible to drive due to a defect, it can be said to be excellent in reliability.

  On the other hand, in the type in which the battery is loaded in the magazine, if the magazine is removed, for example, it is impossible to drive even if the mechanical safety device is unlocked. Therefore, the magazine is removed and only one fastener is loaded into the main body and driven out. In this respect, it can be said that it is excellent in safety against misuse and unauthorized use.

  The present invention has been made in view of such a current situation, and in a gas-type driving tool of a type in which a battery is mounted on the main body, the protection against misuse / unauthorized use with the magazine removed is remarkably improved. It is intended to ensure high safety by increasing it.

  The gas-type driving tool according to the present invention includes a main body in which a rod that moves forward by gas combustion pressure is incorporated, and a magazine that is loaded with a rod-shaped fastener that is driven out by the rod, and the magazine is attached to and detached from the main body. The main body is provided with a trigger for igniting the gas by energizing a spark plug, and a mechanical safety device that does not drive the rod unless the nose is moved backward against the work. The basic configuration is that a battery for supplying power to the spark plug is loaded in the main body.

  In the first aspect of the present invention, the main body is provided with a non-contact type switch that is turned on and off by turning on and off the non-mechanical action, and the magazine is provided with an action source of the non-contact type switch. When the magazine is mounted, the non-contact switch is turned on and the rod is allowed to be ejected. When the magazine is removed, the non-contact switch is turned off and the rod is ejected electrically. It has become impossible.

  According to a second aspect of the present invention, in the first aspect, the non-contact switch is a magnetic sensitive switch that is turned ON / OFF by a magnetic force, and is provided in a space formed in a portion of the main body close to the magazine. A magnet is provided in a space formed in a portion of the magazine close to the magnetosensitive switch.

  In the present invention, as a means for electrically disabling the rod by turning off the non-contact type switch, for example, a switch for interrupting energization to the spark plug is provided somewhere in the power supply circuit. By turning off the contact-type switch, the energization to the spark plug can be cut off. In addition, there is a driving tool of the type in which the nozzle for controlling the gas supply to the combustion chamber is driven by an electromagnetic solenoid. In this type, the configuration is such that the power supply to the electromagnetic solenoid is cut off by turning off the non-contact type switch. Can be adopted.

  Furthermore, it is possible to set so that the trigger circuit is not energized even if the trigger is pulled when a non-contact switch is turned off by inserting a non-contact switch in the trigger circuit where the energization is interrupted by the trigger. is there.

  In the present invention, when the magazine is removed, the non-contact type switch is turned off, so that the fastener cannot be driven even if the mechanical safety device is unlocked by any method. Accordingly, it is possible to prevent or remarkably prevent misuse or unauthorized use in which a magazine is removed and a fastener is loaded and fired in the air. And since a battery is loaded in a main body, the problem of the malfunctioning by the contact failure of the contact for power supplies does not arise.

  As a non-contact type switch, for example, an infrared sensor switch (infrared sensor) can be used. However, if a magnetosensitive switch is used as in claim 2, it is sufficient to load a magnet into the magazine, so the structure is simple. This is advantageous in terms of cost. Further, since it is not affected by dirt or the like and is not deteriorated, the reliability of the operation of the non-contact type switch is excellent. In particular, when a permanent magnet is used, there is an advantage that the structure is simpler, maintenance is not required, and a power source for operating the magnetosensitive switch is not required.

It is a side view of the gas type driving tool concerning an embodiment. It is a side view in the state where a magazine was removed. (A) is the perspective view which looked at the lower part of the main body from back, (B) is the perspective view of a battery. It is a side view inside a principal part.

  Next, an embodiment of the present invention will be described with reference to the drawings. In the following, front / rear / left / right / upper / lower words are used to specify the direction, but this direction indicates the orientation of the user with a normal tool held by a person to fix the workpiece to the wall. The standard. Therefore, the front is the direction of launching the fastener.

(1). Tool Structure As shown in FIGS. 1 and 2, the gas-type driving tool of the present embodiment has basically the same structure as that of Patent Document 1, and includes a main body 1 and a magazine 2 as essential elements. ing. The main body 1 includes an upper body 4 having a built-in cylinder 3 and a front portion formed as a head portion 4 a, a front guide 5 extending downward from the back of the head portion 4 a of the upper body 4, and a midway before and after the upper body 4. And a lower joint 7 connected to the lower end of the front guide 5 and the lower end of the grip 6.

  A piston (blade) 8 is fitted in the cylinder 3 built in the upper body 4 so as to be slidable back and forth. A rod 9 is fixed to the piston 8. A guide tube 10 is fixed to the head portion 4a of the upper body 4, and the guide tube 10 has a center tube having a tip portion formed with a nose 11 and a punch hole 12 through which a fastener passes over the entire length. It is slidably fitted back and forth. The center tube and the guide tube 10 are formed with fastener supply grooves for supplying fasteners from below so as to communicate with the punching holes 12 and toward the magazine 2.

  A combustion chamber 13 is formed at the rear portion of the upper body 4, and a spark plug 14 faces the combustion chamber 13. Although not shown, a stirring fan is disposed at the rear of the combustion chamber 13. The grip 6 is provided with a trigger 15.

  In the state where the nose 11 has advanced, the valve for supplying the gas to the combustion chamber 13 is closed and the trigger 15 is locked so as not to be retractable. Therefore, the fastener cannot be driven out. That is, the lock function of the mechanical safety device is effective. On the other hand, when the nose 11 is pressed against a workpiece (not shown), the nose 11 moves backward from the tip of the guide tube 10 to a slightly exposed state, and accordingly gas is supplied to the combustion chamber 13. The lock of the trigger 15 is also released. For this reason, when the trigger 15 is pulled, the spark plug 14 sparks and the gas is combusted, and the piston 8 and the rod 9 are advanced by the combustion pressure and the fastener is driven out. As a method of supplying gas to the combustion chamber 13 by retreating the nose 11, in this embodiment, a solenoid valve that is turned on by retreating the nose 11 is used. However, there is a model that uses a mechanical valve. .

  In this embodiment, it can be said that when the trigger 15 is pulled after the nose 11 is picked up with a finger and retracted, the fastener can be driven out. However, the nose 11 is fully retracted and exposed only slightly from the tip of the guide tube 10. In order to hold the nose 11 backward by pressing it with a finger, the nose 11 must be closed from the front with the fingertip. Then, the finger is injured by the zipper that was punched out. In other words, if the user picks up the nose, retracts it, and pulls the trigger 15, the user himself is injured. Therefore, the nose 11 is a mechanical safety device that suppresses misuse and unauthorized use of firing the fastener in the air. It is functioning.

  As shown in FIG. 3, the lower joint 7 of the main body 1 is formed with a gas cartridge loading chamber 17 and a battery loading chamber 18 that are opened rearward and adjacent to each other on the left and right. A gas cartridge (gas cylinder) (not shown) is loaded into the gas cartridge loading chamber 17. The battery loading chamber 18 is loaded with a square battery 19 as shown in FIG.

  A pair of upper and lower electrodes 19 a is provided at the tip of the battery 19. An arm 20 extending forward is provided at the rear end of the battery 19, and an upward hook-like claw 21 is formed on the arm 20. When the claw 21 is fitted in an engaging groove (not shown) formed on the ceiling surface of the battery loading chamber 18, the battery 19 is held so as not to be detached. The base of the arm 20 is exposed above. Accordingly, when the exposed portion of the arm 20 is pushed downward, the claw 21 is detached from the engaging groove, and the battery 19 can be taken out.

  As the driving tool, a connected fastener (not shown) in which many fasteners are connected in parallel is used. Therefore, the magazine 2 is formed with a fastener loading groove 22 that fits the connecting fastener in a vertically movable manner over the entire vertical length. The fastener loading groove 22 has a dovetail shape so that the connecting fastener does not come out sideways (in a direction perpendicular to the paper surface). In the fastener loading groove 22, a pusher 23 that pushes the connecting fastener upward is fitted so as to be movable up and down. The pusher 23 is biased upward by a spring. The fastener loading groove 22 is also opened downward, and the connected fastener is inserted into the fastener loading groove 22 from below.

  A forward-facing hook-shaped upper engagement claw 24 is provided at the upper end of the magazine 2, and a rearward-facing lower engagement claw 25 is provided at the rear surface of the lower end. Correspondingly, an upper engaging portion (not shown) with which the upper engaging claw 24 engages is formed in the head portion 4a of the main body 1, and the lower end of the front guide 5 is shown in FIG. As shown, the lower engaging claw 25 is provided with a lower stopper 26 that stretches from below. The lower stopper 26 is disposed in a space of a forward opening formed in the front guide 5.

  The lower stopper 26 is provided on a horizontally elongated shaft 27. One end of the shaft 27 is exposed outside the front guide 5, and a lever 28 is provided at the exposed end. The lower stopper 26 is urged by a spring provided on the shaft 27 so as to engage with the lower engagement claw 25. When the lever 28 is rotated in the direction of the arrow in FIG. 1, the lower stopper 26 is rotated in the direction of the arrow in FIG. Thereby, the engagement between the lower stopper 26 and the lower engagement claw 25 is released. Therefore, the magazine 2 can be removed. Note that a foot 29 is provided at the lower end of the magazine 2 to hold the tool in an appropriate posture against the surface of the workpiece.

  Note that a lockout bracket 30 for preventing idling is disposed on the lower surface of the head portion 4a in the main body 1. The lockout bracket 30 is urged by a spring in the direction of the arrow 31, and when the pusher 23 rises, for example, about three fasteners remain, the lockout bracket 30 is moved in the direction of the arrow 32 by the pusher 23. When pressed, it enters a mechanical locked state. Therefore, the operator retracts the pusher 23 and loads a new connecting pin.

(2) Electric safety device The main body 1 is formed in a hollow shape by overlapping two left and right shell members. In FIG. 3A, the mating surfaces of the two shell members are indicated by reference numeral 33. The gas cartridge loading chamber 17 and the battery loading chamber 18 described above are also formed in a space formed between the two shell members. In addition, a circuit board and cables are also formed between the two shell members. It is arranged in the void formed.

  In FIG. 4, one shell body (right shell body) constituting the main body 1 is denoted by reference numeral 34, and the shell body 34 includes an outer peripheral rib 35 and an inner peripheral rib 36 that form an outer shape, The arranged reinforcing ribs 37 are formed, and the inside of the main body 1 is empty due to the presence of the inner and outer ribs 35 and 36.

  Then, as an example of a non-contact type switch, a magnetosensitive switch (magnetic sensor) that is turned on by the magnetic force itself as an example of a non-contact type switch in a space formed in a lower portion of the lower guide 26 in the lower portion of the front guide 5. 38) is arranged. The magnetosensitive switch 38 is arranged in a state of being brought close to the outer peripheral rib 35 constituting the front surface of the front guide 5. The magnetic sensitive switch 38 is interposed between the battery 19 and a circuit board (not shown). When the magnetic sensitive switch 38 is turned off, the current supply to the circuit board is cut off. Accordingly, the lead wire 39 may be connected to the battery 19 or connected to the circuit board. Note that one lead wire 39 is connected to the battery 19 and two wires are connected to the circuit board, and thus there are a total of three, but only two wires are shown in the figure.

  On the other hand, the magazine 2 also has a structure in which two left and right shell bodies are overlapped and fixed with screws, and the inside is hollow. A magnet 40 as an action source of the non-contact type switch is disposed in the cavity inside the magazine 2 above the lower engaging claw 25. The magnet 40 is a permanent magnet.

  As described above, the driving tool has a circuit board, and a control circuit is incorporated in the circuit board. The switch of the trigger 15, the spark plug 14, and the stirring fan are connected to the control board. Moreover, since the driving tool of the present embodiment includes the solenoid valve as described above, the electromagnetic solenoid is also connected to the circuit board. In some cases, an electric element such as an illuminating lamp or a pilot lamp is provided. In this case, each electric element is connected to the circuit board.

  When the magazine 2 is mounted on the main body 1, the magnetosensitive switch 38 is turned on by detecting the magnetic force of the magnet 40 and energizes the circuit board. On the other hand, when the magazine 2 is removed, the magnetosensitive switch 38 is turned OFF and the power supply to the circuit board is cut off. Therefore, even if the mechanical lock is released by some means, the spark plug 14, the stirring fan, and the electromagnetic solenoid do not operate, and as a result, the fastener cannot be driven out.

  Thus, the gas-type driving tool of the present invention is double-locked by the nose 11 and the magnetosensitive switch 38. For this reason, it is possible to secure a high level of defense against misuse and unauthorized use.

  In the present embodiment, when the magnetic switch 38 is turned off, the energization to the circuit board is cut off. However, when the magnetic switch 38 is turned off, the ignition plug 14 is turned off or the electromagnetic solenoid is turned off. It is also possible to do. However, if the power supply to the circuit board is interrupted as in the embodiment, there is an advantage that the prevention of the fastener from being surely prevented. Further, when the magazine 2 is removed, power consumption is eliminated, so that there is an advantage that the battery 19 can be extended.

  When a permanent magnet is used as the magnet 40 as in this embodiment, there is an advantage that the configuration is simplified. Note that the magnetosensitive switch 38 and the magnet 40 are slightly shifted in the vertical direction due to the detection characteristics of the magnetosensitive switch 38.

(3). Others In the above embodiment, a permanent magnet is used as a magnet, but an electromagnet can also be used. In this case, for example, it is possible to employ a configuration in which a dedicated battery for an electromagnet is provided in the magazine 2 and a switch that is turned on when the magazine is loaded into the main body is provided in a circuit that feeds power from the dedicated battery to the electromagnet.

  Alternatively, a contact (electrode) is provided on the mating surface of the magazine 2 and the main body 1, and when the magazine 2 is attached to the main body 1, the contacts of each other come into contact with each other and the electromagnet is energized from the battery provided in the main body 1. You may set as follows. Specifically, there is a structure in which a convex portion is provided in the magazine, a concave portion is provided in the main body, and when the magazine is set in the main body, the switch provided in the concave portion is pressed by the convex portion to be turned on and energized. obtain.

  Further, it is possible to adopt a configuration in which a convex portion is provided on the magazine, while a turquoise switch is provided on the main body, and when the magazine is attached, the turquoise switch is turned on by the convex portion and energized.

  Moreover, although said embodiment used the magnetosensitive switch as a non-contact type switch, it is also possible to use an infrared switch, for example. In this case, an LED lamp for irradiating infrared rays may be disposed on the magazine 2, or an LED lamp may be provided on the main body, and a reflective material may be disposed on the magazine.

  Further, since the main body and the magazine are usually made of resin, it is possible to use a metal sensing switch (metal sensor) as a non-contact type switch and incorporate a metal as a working source in the magazine.

  The present invention can be embodied in a gas driving tool. Therefore, it can be used industrially.

1 Body 2 Magazine 3 Cylinder 4 Upper Body 5 Front Guide 6 Grip 7 Lower Joint 8 Piston (Blade)
DESCRIPTION OF SYMBOLS 9 Rod 10 Guide pipe | tube 11 Nose 13 Combustion chamber 14 Spark plug 15 Trigger 18 Battery loading chamber 19 Battery 34 Shell body which comprises main body 35-37 Rib 38 Magnetosensitive switch 40 as an example of non-contact type switch 40 Non-contact type switch Magnet as source of action

Claims (2)

A main body in which a rod that moves forward by the combustion pressure of gas is incorporated, and a magazine that is loaded with a rod-shaped fastener driven out by the rod, the magazine being detachable from the main body,
The main body is provided with a trigger for energizing the ignition plug to ignite the gas, and a mechanical safety device that does not drive the rod unless the nose is moved backward by hitting a work piece. The battery for supplying power is a configuration loaded in the main body,
The main body is provided with a non-contact type switch that is turned ON / OFF by turning on and off the non-mechanical action, and the magazine is provided with an action source of the non-contact type switch. When the non-contact switch is turned on and the rod is allowed to be ejected and the magazine is removed, the non-contact switch is turned off and the rod is electrically ejected.
Gas type driving tool. The non-contact type switch is a magneto-sensitive switch that is turned ON / OFF by magnetic force, and is provided in a space formed in a portion of the main body close to the magazine,
A magnet is provided in a space formed in a portion of the magazine close to the magnetosensitive switch,
The gas-type driving tool according to claim 1.

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