초록 ▼

A fuel cartridge, which is capable of being mounted on a tool main body of a gas-combustion type driving tool so as to supply fuel gas to a striking mechanism of the tool main body, is provided with an ejection nozzle provided at a port portion formed at an end portion of a cartridge main body and s

A fuel cartridge, which is capable of being mounted on a tool main body of a gas-combustion type driving tool so as to supply fuel gas to a striking mechanism of the tool main body, is provided with an ejection nozzle provided at a port portion formed at an end portion of a cartridge main body and slidable with respect to the cartridge main body; a compression spring for biasing the ejection nozzle so that a tip end of the ejection nozzle protrudes from the cartridge main body; and an ejection hole formed at a side wall of a tip end portion of the ejection nozzle.

대표청구항 ▼

1. A fuel cartridge which is capable of being mounted on a tool main body of a gas-combustion type driving tool so as to supply fuel gas to a striking mechanism of the tool main body, the fuel cartridge comprising: an ejection nozzle provided at a port portion formed at an end portion of a cartridge

1. A fuel cartridge which is capable of being mounted on a tool main body of a gas-combustion type driving tool so as to supply fuel gas to a striking mechanism of the tool main body, the fuel cartridge comprising: an ejection nozzle provided at a port portion formed at an end portion of a cartridge main body and slidable with respect to the cartridge main body;a compression spring for biasing the ejection nozzle so that a tip end of the ejection nozzle protrudes from the cartridge main body;an ejection hole formed at a side wall of a tip end portion of the ejection nozzle;an adaptor sleeve provided at a periphery of the ejection nozzle; andan inner plate slidable within the adaptor sleeve and having a fitting hole which fits with the ejection nozzle,wherein, in a standby mode, the inner plate engages with an engagement edge of the adaptor sleeve in a manner that a protrusion edge formed at an outer peripheral end of the inner plate engages with the engagement edge of the adaptor sleeve. 2. The fuel cartridge according to claim 1, wherein the compression spring biases the ejection nozzle in an axial direction of the ejection nozzle, and a direction in which the ejection hole extends intersects with the axial direction of the ejection nozzle. 3. The fuel cartridge according to claim 1, further comprising a valve disposed at the port portion, wherein the valve opens when the ejection nozzle slides against a biasing force of the spring. 4. The fuel cartridge according to claim 3, wherein the tip end of the ejection nozzle protrudes outward from an opening end of the adaptor sleeve. 5. The fuel cartridge according to claim 3, wherein the inner plate is biased in a direction of protruding to an outside of the adaptor sleeve. 6. The fuel cartridge according to claim 5, further comprising a guide portion provided on the inner plate and for guiding a coupling portion in the tool main body to the ejection nozzle. 7. The fuel cartridge according to claim 5, wherein the inner plate is biased so as to protrude outward than an opening end of the adaptor sleeve. 8. The fuel cartridge according to claim 5, wherein the compression spring, the inner plate and the adaptor sleeve are disposed coaxially with the ejection nozzle. 9. The fuel cartridge according to claim 5, further comprising a cap for covering the inner plate and the ejection nozzle and detachably attached to the adaptor sleeve, wherein the cap includes a needle portion capable of being inserted inside of the ejection nozzle from a tip end of the ejection nozzle at a center portion of an inside of the cap, andan inner diameter of the cap is slightly larger than an outer diameter of a bottom portion of the fuel cartridge. 10. A gas-combustion type driving tool comprising: a housing portion capable of loading a fuel cartridge from one end of the housing portion, the fuel cartridge including an ejection nozzle biased by a first compression spring and fuel gas being ejected when the ejection nozzle is pushed with respect to a cartridge main body against a biasing force of the first compression spring;a coupling sleeve provided at the other end of the housing portion and capable of inserting the ejection nozzle of the fuel cartridge therein;a nozzle piston slidably housed with in the coupling sleeve and capable of abutting a tip end of the ejection nozzle;a second compression spring for biasing the nozzle piston to a tip end portion side of the coupling sleeve,an adaptor sleeve provided at a periphery of the ejection nozzle; andan inner plate slidable within the adaptor sleeve and having a fitting hole which fits with the ejection nozzle,wherein, in a standby mode, the inner plate engages with an engagement edge of the adaptor sleeve in a manner that a protrusion edge formed at an outer peripheral end of the inner plate engages with the engagement edge of the adaptor sleeve,wherein a biasing force of the second compression spring is smaller than the biasing force of the first compression spring, andwherein, after the fuel cartridge is pushed into the housing portion to move backward the nozzle piston to a movable end thereof by the first compression spring, when the fuel cartridge is further pushed in, the nozzle piston pushes in the ejection nozzle so that the fuel gas is ejected from the ejection nozzle and supplied to a side of the coupling sleeve. 11. The driving tool according to claim 10, wherein a tip end of the nozzle piston in an axial direction of the nozzle piston is closed, the nozzle piston includes an introduction hole extending in a direction intersecting said axial direction and formed near the tip end portion,two seal members are provided at an inner peripheral surface of the coupling sleeve with an interval therebetween, andwhen an ejection hole of the ejection nozzle extending in a direction intersecting said axial direction and the introduction hole are located between the seal members, the fuel gas is supplied from the ejection hole to the introduction hole. 12. The driving tool according to claim 10, wherein a tip end of the nozzle piston in an axial direction of the nozzle piston is closed, two seal members are provided at an inner peripheral surface of the coupling sleeve with an interval therebetween,an introduction hole penetrating a side wall of the coupling sleeve is formed between the seal members, andwhen an ejection hole of the ejection nozzle extending in a direction intersecting said axial direction are located between the seal members, the fuel gas is supplied from the ejection hole to the introduction hole. 13. The driving tool according to claim 10, the tool main body is provided with a fuel measuring device. 14. The driving tool according to claim 10, wherein the cartridge main body is provided with an adaptor sleeve at a periphery of the ejection nozzle, an inner plate having a fitting hole fitting to the ejection nozzle is slidably provided within the adaptor sleeve, andthe inner plate is biased in a direction of protruding toward an outside of the adaptor sleeve. 15. The driving tool according to claim 10, wherein a dust proof seal member which contacts with the nozzle piston in a standby state to prevent dust from entering from an end portion of the coupling sleeve is provided at an inner peripheral surface of the end portion of the coupling sleeve.