1. Field of Invention
The present invention relates to an electric/pneumatic tool (fastener gun) for continuous use of fasteners. More particularly, the present invention relates to a fastener gun capable of preventing accidental discharging.
2. Description of Related Art
A conventional fastener gun was disclosed in Taiwan Application Serial Number 98101444 (Taiwan Publication Number 201026450 A1), titled “Method for continuous use of fasteners” (hereafter referred to as “444”). The application discloses that a fastener gun 10 fires fasteners 31 of the fastener strip 30 sequentially. When the fasteners 31 are fired respectively, the feed member 13 may push the fastener strip 30 so that the next fastener 31 enters the firing channel.
However, as shown in FIG. 6 of “444”, the feed member 13 pushes the second fastener 31 of the fastener strip 30 so that the first fastener 31 enters the firing channel. When the fastener gun fires the fasteners repeatedly till the fastener strip 30 remains only one fastener 31, the movement of the feed member 13 can not push the last fastener 31 into the firing channel thoroughly so that the last fastener 31 locates under the firing channel. At this moment, if the firing action is executed, the fastener gun may be damaged. For the forgoing reasons, there is a need for providing a safety mechanism to prevent the fastener gun from firing when the residual fastener of the fastener strip is insufficient.
Moreover, the user usually makes the muzzle of the fastener gun 10 knock the work-piece in order to ensure if the fastener gun can fire or not. Therefore, the structure of the safety mechanism should preferably meet the habit of the users. Accordingly, it is convenient for usage, and it also prevents the safety mechanism from damage owing to wrong operation.
One aspect of the present disclosure is providing a fastener gun capable of preventing accidental discharging when the residual fastener of the fastener strip is insufficient.
Another aspect of the present disclosure is providing a fastener gun capable of preventing accidental discharging, and providing a safety unit meeting the habit of the users. The safety unit has long life cycle.
In order to achieve the aspects above and others, the present disclosure provides a fastener gun capable of preventing accidental discharging. The fastener gun capable of preventing accidental discharging includes a gun body, a safety unit and a fastener magazine. The gun body has a firing channel to receive a fastener. The safety unit is disposed adjacent the firing channel and may move between a non-firing position and a firing standby position. The fastener magazine is connected to the firing channel and is utilized to guide a fastener strip consisting of a plurality of fasteners. The fastener gun capable of preventing accidental discharging further includes a connecting portion disposing between the fastener magazine and the firing channel. The fastener gun capable of preventing accidental discharging further includes a stopping bar disposing on the connecting portion and capable of moving between a first position and a second position. The stopping bar has a pushing portion and a stop portion. The pushing portion may be optionally pushed by the fastener strip in the fastener magazine. The stop portion may optionally stop a movement of the safety unit. When the stopping bar locates at the first position, the fastener strip dose not push the pushing portion and the stop portion stops the movement of the safety unit. When the fastener strip pushes the pushing portion so that the stopping bar locates at the second position, the stop portion does not stop the movement of the safety unit.
It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed.
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings,
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
Referring to
The gun body 10 has a firing channel 11 to receive a fastener 1, and a trigger 12. When the firing conditions are satisfied, the user pulls the trigger 12 and actuates the rammer (not shown) so that the fastener 1 in the firing channel 11 is fired. The fastener gun capable of preventing accidental discharging has a connecting portion 13 disposing between the fastener magazine 30 and the firing channel 11. In this embodiment, the connecting portion 13 is disposed on a side of the gun body 10 adjacent to the fastener magazine 30.
One of the firing conditions above is controlled by the safety unit 20. The safety unit 20 is disposed in the firing channel 11 and may move between a non-firing position and a firing standby position. When the safety unit 20 locates at the non-firing position (as shown in
The fastener magazine 30 is connected to the firing channel 11 and is utilized to guide the fastener strip 3 consisting of a plurality of fasteners 1. For explanation, the fastener 1 of the fastener strip 3 locating in the firing channel 11 is referred as a first fastener 1a, and the fastener 1 adjacent to the first fastener 1a is referred as a second fastener 1b. The fastener strip 3 further includes several connection sections 2 connecting every two adjacent fasteners (for example, the first fastener 1a and the second fastener 1b, or every two adjacent fasteners 1, as shown in
By a pivot 43, the stopping bar 40 is disposed on the connecting portion 13 of the gun body 10 so that the stopping bar 40 may swing or move between a first position (as shown in
The first elastic member 50 is utilized to provide the stopping bar 40 with an elastic force in order to move back the stopping bar 40 to the first position. In this embodiment, the first elastic member 50 is a torsion spring disposed between the stopping bar 40 and the connecting portion 13. However, the first elastic member 50 may be replaced by other spring, rubber and the like in different type.
The feed member 60 is utilized to push one fastener of the fastener strip 3 at a predetermined position. For instance, the upper opening of the fastener 1 is pushed so that the fastener strip 3 is moved in the first direction toward the firing channel 11. For example, after the first fastener 1a is fired, the feed member 60 pushes the fastener strip 3 so that the second fastener 1b enters the firing channel 11 (as shown in
The preventing separation mechanism 70 includes a lever 71 and a second elastic member 72. By a pivot 73, the lever 71 is pivoted on the fastener magazine 30 so that the lever 70 may swing between a stop position (as shown in
The operation of the fastener gun according to this embodiment is explained below through the accompanying drawings.
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According to the present disclosure, when the residual fastener of the fastener strip is insufficient (remaining only one fastener in the embodiment above), the accidental discharging can be avoided. However, the quantity of remaining fasteners may be changed by adjusting the disposing position of the stopping bar. Besides, the preventing separation mechanism may prevent the fastener gun from damaged by improperly pulling the fastener strip. Thus, the cost on maintenance of the fastener gun can be reduced.
Although the present invention has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of the present disclosure provided they fall within the scope of the following claims and their equivalents.