JPH0536629Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a tool for driving fasteners such as nails, and more specifically, the present invention relates to a tool for driving fasteners such as nails, and more specifically, to guide the driver blade of the tool into the blade passage in the nose part in the correct direction. Regarding blade sleeves.

[Prior art and its problems] Typical conventional fastener driving tools include:
Nailers are known. For example, referring to FIG. 6, there is shown a conventional structure in which the blade sleeve 1 of a nailer as a fastener driving tool is installed at the entrance of the blade passage 3 of the nose section 2. , the blade sleeve 1 is the nose part 2
It is held in place by an elastic shock absorber damper 4 installed inside. In this case, the buffer body 4 is not firmly fixed and may move upward. Therefore, blade sleeve 1
In some cases, the shock absorber 4 may fall out or the shock absorber 4 may be damaged.

[Object of the invention] An object of the invention is to provide a fastener driving tool equipped with a fixing means for firmly preserving the blade sleeve.

[Structure of the invention] In order to achieve this object, the present invention provides a fastener driving tool having a nose portion having a blade passage through which a driver blade driven to drive a fastener such as a nail, a blade sleeve disposed at the inlet of the blade passageway for guiding the driver blade into the blade passageway in the correct orientation; and a securing means for securing the blade sleeve within the nose section, the securing means for securing the blade sleeve in the nose section; - when the blade sleeve is installed in a cavity provided at the entrance of the blade passage to accommodate the blade sleeve, including a retaining ring mounted in an annular groove provided circumferentially in the side surface of the sleeve; There is provided a fastener driving tool characterized in that the retaining ring engages in an annular groove formed in the circumferential direction on the side surface of the cavity.

[Operation] According to the invention, the retaining ring engages both the annular groove of the blade sleeve and the annular groove of the sleeve receiving cavity of the nose part, and holds the blade sleeve firmly.

[Examples] Hereinafter, the present invention will be described by way of examples with reference to the accompanying drawings.

Referring first to FIG. 1, there is shown a generally cylindrical blade sleeve 10 in accordance with the present invention, which blade sleeve 10 defines a longitudinally extending blade guide passageway 12 therethrough, as is well known in the art. As best seen in FIG. 2, the blade guide passageway 12 has a shoulder 14 therebetween, and a vertical side surface 1 extending upwardly in FIG. 2 from the shoulder 14.
6 is a flat surface, and this flat surface corresponds to a flat surface of a driver blade (not shown) to guide the driver blade so that it can move in the correct direction.

As shown in the figure, most driver blades have a cylindrical shape, but blades that are rectangular are also known so that the fastening tool can be driven into narrow spaces. It should be understood that when using this blade, the cavity 26 will also be formed with a generally rectangular cross-section to match the shape of the blade.

A circumferentially extending annular groove 18 is formed in the side surface of the blade sleeve 10, and a resilient C-shaped retaining ring 20 shown in FIG.
are fitted as shown in FIG. In this embodiment, the C-shaped retaining ring 20 is slightly twisted at each end so that it is offset, and when installed within the annular groove 18 of the blade sleeve 10, as shown in FIG. The side wall surface of the retaining ring 20 is frictionally engaged with the side surface of the ring to prevent the retaining ring 20 from moving and to prevent play between the blade sleeve and the nose.

According to the present invention, as shown in FIG.
A cylindrical cavity 26 that substantially matches the outer shape of the sleeve 10 is formed, and an annular groove 28 extending in the circumferential direction is also formed in the side wall surface of this cavity 26. A retaining ring 20 is inserted into this space 26 as shown in FIG.
When the blade sleeve 10 incorporating the blade sleeve 10 is installed as shown in FIG.
The sleeve 10 is held firmly within the cavity 26.

Referring to FIGS. 2 and 4, if the outer diameter of the ring constituting the retaining ring 20 is d, the depth of the annular groove 18 of the blade sleeve 10 is 1.2 d.
Then, the outer diameter of the retaining ring 20 is selected so that the retaining ring 20 protrudes from the side surface of the blade sleeve 10 by a distance of d/2 in a free state after being installed in the annular groove 18. The depth of the annular groove 28 in the cavity 26 is preferably about d/2.

[Effects of the invention] According to the invention, the blade sleeve can be firmly held at the blade passage entrance of the nose portion without the aid of an elastic buffer.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the blade sleeve of the fastener driving tool according to the present invention. 2 is a longitudinal sectional view of the blade sleeve of FIG. 1; FIG. FIG. 3 is a perspective view of a retaining ring that fits into the annular groove of the blade sleeve. FIG. 4 is a longitudinal cross-sectional view of the nose portion showing the cavity formed at the blade passage entrance to accommodate the blade sleeve shown in FIG. 1; FIG. 5 is a sectional view showing a state in which the blade sleeve is installed in the cavity shown in FIG. 4 and the retaining ring retains the blade sleeve. FIG. 6 is a longitudinal sectional view illustrating a conventional method for holding a blade sleeve. In the drawings, 10...blade sleeve;
12... Blade guide passage, 18... Annular groove, 2
0... Retaining ring, 22... Nose part, 24...
Blade passage, 26... void, 18... annular groove.

Claims (1)

[Scope of utility model registration request] A fastener driving tool having a nose portion having a blade passage through which a driver blade driven to drive a fastener such as a nail is installed at the entrance of the blade passage, and a tool for driving a fastener such as a nail in the correct direction. a retaining ring comprising a blade sleeve leading into the blade passage and securing means for securing the blade sleeve within the nose section, the securing means being mounted in an annular groove provided circumferentially in the side surface of the blade sleeve; and an annular ring formed circumferentially on a side of the cavity when the blade sleeve is installed in the cavity provided at the entrance of the blade passage to receive the blade sleeve. A fastener driving tool characterized by being adapted to engage in a groove.