Elongated-member-driving apparatus – With means to move or guide member into driving position – With means to assure correct orientation of member
Reexamination Certificate
2000-03-03
2002-12-31
Smith, Scott A. (Department: 3721)
Elongated-member-driving apparatus
With means to move or guide member into driving position
With means to assure correct orientation of member
C227S120000, C227S136000
Reexamination Certificate
active
06499642
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a magazine mechanism which is provided for a nailing machine. Particularly, the present invention relates to a multiple-loading magazine mechanism accommodating plural rows of connected nails called as stick nails and connected in a straight line.
More particularly, another aspect of the present invention relates to a guide mechanism made adaptable to a magazine into which so-called stick nails in the form of a structure such that heads of a plurality of nails are caused to overlap and capable of driving even a final one of the connected nails into a nose portion.
Moreover, another aspect of the present invention relates to a mechanism for adjusting the height of a magazine for a nailing machine of a type with which a plurality of connected nails are arranged and loaded capable of adjusting the height of the magazine to correspond to the length of the shaft of each of the connected nails.
Furthermore, another aspect of the present invention also relates to a nail feeding mechanism for a multiple-loading magazine for connected nails (stick nails) structured to feed nails from a multiple-loading magazine which is capable of accommodating the connected nails from inside to the outside to a nose portion of a nailing machine.
Moreover, another aspect of the present invention relates to a mechanism for holding connected nails for a multiple-loading magazine of a nailing machine adaptable to a multiple-loading magazine capable of permitting connected nails formed by linearly connecting a plurality of nails to be loaded from inside to the outside in a multi-row manner and enabled to hold the inside connected nails such that undesired movement of the connected nails is prevented if the direction of the nailing machine is changed.
2. Description of the Related Art
A magazine of a usual nailing machine incorporates only one branched passage for accommodating a series of stick nails, causing limitations to be imposed on the number of nails which can successively be driven. Therefore, a new stick nails must be loaded whenever a series of the connected nails are consumed. This mean that the troublesome operation for loading the stick nails must be repeated when a multiplicity of nails must be driven.
Therefore, a structure has been devised in which stick nails formed into a plurality of rows are loaded into the magazine. After the stick nails in the first row has been consumed, next stick nails are successively supplied. As disclosed in JP-B-6-61706, the multiple-loading magazine mechanism of the foregoing type incorporates a separating member called a moving shuttle disposed between a first stick nail and a second stick nail. The moving shuttle is moved in the lengthwise direction to sequentially separate one of the plural nail rows. Another structure has been disclosed in JP-B-43-10477 in which a plurality of stick nail passages formed in parallel with one another are formed in the magazine. Thus, the magazine is laterally slid whenever one stick nail row is consumed to cause a new row to face the nose portion.
The conventional method, however, requires the mechanism for moving the separating member and the mechanism for moving the magazine. Therefore, there arises a problem in that the overall structure becomes too complicated and the weight of the nailing machine is enlarged excessively.
As another point of view of a feeding mechanism for a magazine for connected nails, a method using a pusher, which is usually employed, is considered. The method is arranged such that a pusher is disposed in a nail feeding passage in the magazine. Moreover, the rear end of the connected nails loaded into the nail feeding passage is pushed by a rated-output spring of the pusher to supply the connected nails to the cylindrical nose portion. To prevent rearward inclination of the leading end of the stick nails and ejection through an opening for connecting the nose portion and the magazine to each other at the instant when the stick nails is driven by a driver, the nail is supplied such that its leading end is inclined forwards and its head is inclined rearwards.
To supply even a final nail of the stick nails to the nose portion, the pusher must be moved to a position shown in FIG.
9
. The foregoing movement, however, causes a leading end
230
a
of the pusher
230
is introduced into the nose portion
231
. Therefore, when the driver
232
is operated in the foregoing state, the driver
232
strikes and breaks the leading end
230
a
of the pusher
230
introduced into the nose portion
231
. Hence it follows the movement of the pusher
230
must be stopped in front of the nose portion
231
. Then, new connected nails must be loaded in a state where a plurality of nails are left in a nail feeding passage
233
. The foregoing phenomenon similarly occurs if the conventional feeding claw is employed as a substitute for the pusher.
Next, two types of magazines for a nailing machine is discussed. A magazine for a nailing machine includes a single loading type magazine for accommodating one row of connected nails and a multiple-loading type magazine for arranging and accommodating a plurality of connected nails. Both of the magazines require the nails to be supplied to a nose portion thereof such that the same height of the heads of the connected nails is maintained. The magazine for accommodating a series of connected nails has a linear groove capable of engaging to the projecting heads of the nails and formed in each of the two side walls of the magazine in a direction in which the nails are fed. Since the connected nails are accommodated in a state where the heads of the connected nails are engaged to the linear grooves formed in the two sides of the walls and the nails are suspended, any problem does not arise regardless of the heights of the shafts of the nails. In a case of a multiple-loading magazine, the connected nails are supported by the bottom of the magazine. Therefore, the height of the magazine is adjusted to correspond to the height of the shafts of the nails. Specifically, an adjustment mechanism for adjusting the height of the bottom portion of the magazine is provided for the multiple-loading magazine.
The conventional mechanism for adjusting the height of a magazine for a multiple-loading nailing mechanism has a structure as shown FIG. 4 of JP-B-6-61706, and it has problems such as bad maneuverability and low strength because the conventional mechanism is assembled by fixing plural members with welding. Therefore, when the nailing machine is dropped, these members can be easily bent or broken, so that the nailing machine can not be used anymore.
Another related art on a multiple-loading magazine for connected nails is discussed hereafter. Conventionally, a multiple-loading magazine for connected nails of the conventional type incorporates only one mechanism for feeding the connected nails in the magazine. Therefore, feeding of the nails cannot satisfactorily be performed.
That is, when only one row of connected nails is present in the magazine, the claw for feeding the nail can be disposed sufficiently adjacent to the nose portion of the nailing machine. In a case of the multiple-loading magazine, the feeding claw must feed the innermost connected nails to the nose portion and as well as feeding inner connected nails in a next row to the nail feeding passage from the magazine after the foregoing connected nails have been consumed. Therefore, the conventional feeding claw has been structured to be capable of reciprocating between the magazine and the nail feeding passage to feed the connected nails in the magazine to the nail feeding passage. Therefore, the feeding claw is disposed at a rear position (adjacent to the magazine) apart from the nose portion as compared with the feeding claw of the single loading feeding claw.
The feeding claw is required to feed a next nail to the nose portion whenever a nail is driven. Therefore, the operation stroke is determined to be a short stroke which is formed to fee
Max Co. Ltd.
Morgan Lewis & Bockius
Smith Scott A.
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