US 7,000,294 B2Granted

Fastener driving tools

AssigneeMakita Corporation

InventorsNobuyuki Kakuda, Yasuyuki Fujimoto

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Abstract

A fastener driving tool includes a tool body. A driver guide is coupled to the tool body and defines a fastener driving channel though which fasteners are driven out. A magazine is coupled to the driver guide and serves to store the fasteners. A detecting device serves to detect when no fastener exists within the fastener driving channel. The detecting device includes a detection member and a detection recess formed in a fastener driving channel. The detection member has a front end in contact with the fasteners stored within magazine, so that the detecting member engages the detection recess when no fastener exists within the magazine and the fastener driving channel. The detection recess is positioned not to oppose the head of the fastener that has been fed into the fastener driving channel.

Claims12

Dependent claims

A fastener driving tool comprising:

a tool body:
a driver guide coupled to the tool body and defining a fastener driving channel;
a magazine coupled to the driver guide and arranged and constructed to store plural types of fasteners that vary with respect to a length of a corresponding fastener,
wherein the plural types of fasteners are stored such that ends of the fasteners, opposite to the heads of the fasteners, are positioned within the magazine at the same reference level irrespective of differences in type,
wherein only one type of the plural types of fasteners is stored within the magazine during a single driving operation;
a pusher plate arranged and constructed to individually feed each of the corresponding fasteners of the plural types of fasteners into the fastener driving channel;
a driver arranged and constructed to drive out each corresponding fastener fed into the fastener driving channel;
a trigger operable by an operator in order to actuate the driver;
an idle driving prevention device arranged and constructed to prevent the driving operation when no corresponding fastener exists within the fastener driving channel, the idle driving prevention device comprising:
a stopper member coupled to the trigger and movable in response to the operation of the trigger;
and
a detection recess defined in an inner wall of the fastener driving channel in a position not opposing a head of the corresponding fastener that has been fed into the fastener driving channel,
wherein the head of the corresponding fastener is driven via contact with the driver,
wherein a restriction plate is disposed within the magazine and comprises an end portion,
wherein the restriction plate is biased in a fastener feeding direction,
wherein the restriction plate moves together with the pusher plate in the fastener feeding direction during the feeding of the corresponding fasteners,
wherein the end portion of the restriction plate enters the detection recess when no corresponding fastener is positioned within the fastener driving channel,
wherein when the end portion of the restriction plate is in the detection recess, the restriction plate engages the stopper member, inhibiting the further operation of the trigger;
wherein the detection recess is disposed at a position, spaced in a direction opposite to the fastener driving direction, away from the head of the corresponding fastener having a longest available length accommodated by the magazine, when an end of the corresponding fastener fed into the fastener driving channel contacts a workpiece during the driving operation of the corresponding fastener through the fastener driving channel,
wherein the end of the corresponding fastener is opposite to the head of the corresponding fastener.

17 more elements

A fastener driving tool comprising:

a tool body;
a driver guide coupled to the tool body and defining a fastener driving channel;
a magazine coupled to the driver guide and arranged and constructed to store plural kinds of fasteners that vary with respect to length,
wherein only a single kind of the plural kinds of available fasteners is stored within the magazine during a driving operation;
and
a detecting device arranged and constructed to detect when no fastener exists within the fastener driving channel,
wherein the detecting device includes a detection member and a detection recess formed in the fastener driving channel, the detection member having a front end contact portion,
wherein the front end contact portion is in contact with at least one fastener stored within the magazine, so that the front end of the detection member engages the detection recess when no fastener exists within the magazine and the fastener driving channel,
wherein the detection member is movable by a distance greater than a thickness of the fastener when a last fastener has been driven out from the fastener driving channel,
wherein the detection recess is positioned so as to not oppose to a head of the fastener that has been fed into the fastener driving channel,
wherein the detection recess is disposed at a position, spaced in a direction opposite to the fastener driving direction, away from the head of the fastener having a longest available length accommodated by the magazine,
wherein the detection recess position is determined at a point in time when an end of the fastener contacts a workpiece during the driving operation of the fastener through the fastener driving channel,
wherein the end of the fastener is opposite to the head of the fastener.

10 more elements

A fastener driving tool comprising:

a tool body;
a driver guide coupled to the tool body and defining a fastener driving channel;
a magazine coupled to the driver guide and arranged and constructed to store at least one type of fastener,
wherein the type of fastener can vary with respect to length;
a detecting device arranged and constructed to detect when no corresponding fastener exists within the fastener driving channel, wherein the detecting device includes a detection member biased in a fastener feeding direction and contacting a last one of the at least one type of fastener within the magazine;
a driver movable within the fastener driving channel in order to apply an impact to a head of the corresponding fastener, fed into the fastener driving channel, when the trigger is operated;
an impact prevention device arranged and constructed to prevent application of the impact to the detecting member by the driver after the last corresponding fastener is driven out from the fastener driving channel by the driver;
a trigger operable by an operator in order to drive out the corresponding fastener fed into the fastener driving channel;
and
an engaging member coupled to the trigger so that the engaging member moves together with the trigger as the trigger is operated, wherein the detection member is engageable with the engaging member to prevent the trigger from being operated when the detection device detects no corresponding fastener within the fastener driving channel,
wherein the impact prevention device comprises a cam mechanism provided between the detection member and the engaging member, so that the detection member is moved away from the fastener driving channel as the engaging member is moved together with the trigger, at least when the trigger is operated to drive out the last corresponding fastener.

8 more elements

Dependencies are inferred from the claim text.