U.S. patent number 3,779,373 [Application Number 05/174,847] was granted by the patent office on 1973-12-18 for nail holder for a setting device operated by explosive force.
This patent grant is currently assigned to Hilti Aktiengesellschaft. Invention is credited to Elmar Maier.
United States Patent |
3,779,373 |
Maier |
December 18, 1973 |
NAIL HOLDER FOR A SETTING DEVICE OPERATED BY EXPLOSIVE FORCE
Abstract
A nail holder for feeding nails serially into a setting device
from which they are driven by an explosive force into a target
material is formed by an elongated belt or strip which has a
plurality of longitudinally spaced holes each of which holds the
shank of a nail. Between each pair of holes a transversely
extending slot is arranged which extends across a major portion of
the strip between its longitudinal edges. When a nail is driven
from the setting device, its head contacts the strip and the
section between the slots separates from the remainder of the strip
forming a disc or washer on the shank of the nail. The disc or
washer has an area which is a multiple of the area of the nail head
and its extended surface is useful in securing low strength
materials to the target material.
Inventors: |
Maier; Elmar (Feldkirch-Tisis,
OE) |
Assignee: |
Hilti Aktiengesellschaft
(Fuerstentum, FL)
|
Family
ID: |
5781001 |
Appl.
No.: |
05/174,847 |
Filed: |
August 25, 1971 |
Foreign Application Priority Data
|
|
|
|
|
Aug 28, 1970 [DT] |
|
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P 20 42 769.4 |
|
Current U.S.
Class: |
206/346;
411/440 |
Current CPC
Class: |
F16B
19/14 (20130101); F16B 15/08 (20130101); B25C
1/184 (20130101) |
Current International
Class: |
B25C
1/18 (20060101); B25C 1/00 (20060101); F16B
19/14 (20060101); F16B 15/08 (20060101); F16B
19/00 (20060101); F16B 15/00 (20060101); B65d
083/00 () |
Field of
Search: |
;85/17,1E ;206/56F
;227/136 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Allen; Edward C.
Claims
What is claimed is:
1. A nail holder assembly for feeding nails serially into a setting
device from which the nails are driven into a target material by an
explosive force, said nail holder assembly comprising a plurality
of nails each having an elongated shank and a disc-like head
portion extending transversely from the shank, an elongated
belt-like strip having a width substantially greater than the
diameter of said disc-like portion, said strip having a plurality
of longitudinally spaced holes therethrough, each said nail
extending through one of the holes in said strip and having its
shank secured within the hole for holding the nail in place with
its disc-like head portion spaced axially from said strip, said
strip having a plurality of slot-like openings extending through
said strip and transversely of its longitudinal direction and each
slot-like opening being spaced between an adjacent pair of said
nail holes, the area of said strip between adjacent said slots
being a multiple of the area of said disc-like head portion on said
nails secured within said strip and the longitudinally extending
sides of said strip positioned laterally outwardly from the
periphery of said disc-like head portion, so that when one of said
nails is driven by explosive force from the setting device, its
head portion strikes said strip with such a force that the section
of said strip surrounding the nail hole and extending between
adjacent said slot-like openings separates from the remainder of
said strip and forms a disc or washer on the shank of said nail
abutting said head portion which disc has an area considerably
larger than the area of said nail disc-like head portion.
2. A nail holder assembly, as set forth in claim 1 wherein said
slot-like openings extend across approximately 90 percent of the
width of said strip and the ends of each said slot are spaced
inwardly from the longitudinally extending edges of said strip.
3. A nail holder assembly, as set forth in claim 1, wherein
longitudinally spaced recesses are formed in the longitudinally
extending edges of said strip for receiving feeding members for
moving said strip through the setting device.
Description
SUMMARY OF THE INVENTION
The present invention is directed to a nail holder for use in a
setting device from which the nails are driven by explosive force
and, more particularly, it concerns a holder arranged to form a
disc or washer on the shank of the nail as the nail is driven into
a target material.
While it has been known to use nail holders in nail setting
devices, generally speaking it is necessary to use nails having the
smallest possible head diameter, since nails with a large size head
are difficult to supply into the setting device. It has been known
to use belt-like holders in which the individual nails are guided
in jackets, however, for structural reasons in such holders it is
possible to only use nails with small heads.
Accordingly, it has not been possible to use nail holders in nail
setting devices operated by explosive force for fastening low
strength materials to a target material. When such low strength
materials are being secured to a target material, it is necessary
that the nail or fastening member include a disc or washer of the
largest possible area for securing the low strength material
without causing it any damage.
It is necessary to provide a disc or washer on a fastening element
for use in attaching a low strength material to a target material
for adequately transferring the impact created by the fastening
member as it is driven into the target material. If the area of the
disc or head on the nail is too small, the low strength material
may be damaged by the impact, or the nail may penetrate through the
material so that it is ineffective in providing the attachment of
the material to the target material.
Accordingly, the invention is directed to the problem of supplying
a nail or fastening device mounted in a holder which provides a
large area disc or washer when it is driven by a setting device
into a target material. Therefore, in accordance with the present
invention, an elongated strip-like holder is provided for the nails
with holes spaced apart in the longitudinal direction for holding
the nails about their shanks. Between each pair of holes, the
holder has transversely extending slots which form breaking points
in the holder. Further, the area of the holder between adjacent
slots is considerably greater than the area of the nail head so
that its surface provides a multiple of the surface of the nail
head. Accordingly, when a nail is driven by the setting device and
its head contacts the holder, the section of the holder between
adjacent slots breaks away from the remainder of the holder strip
and forms a disc or washer on the shank of the nail.
By using such a holder strip, it is possible to provide a
large-area disc or washer on the nail and, in addition, it is
possible to feed any desired length of the holder strip into the
setting device. Accordingly, the time consuming refilling or
replacing of the holder for the nails is obviated. Furthermore, the
holder assures that the nails are adequately guided into the
setting device, since the holder is firmly retained in the device
and the section of the holder each holding one nail between
adjacent slots, easily separates from the remainder of the holder
strip only in the final portion of the driving operation. Due to
the transversely extending elongated slot, the material of the
holder separates into the required discs or washers when the nail
head, driven by a propelled piston within the setting device,
contacts the holder strip.
Preferably, the longitudinally extending edges of the holder strip
are provided with spaced recesses for engagement by conventional
actuating members for feeding the holder strip through the setting
device.
The various features of novelty which characterize the invention
are pointed out with particularity in the claims annexed to and
forming a part of this disclosure. For a better understanding of
the invention, its operating advantages and specific objects
attained by its use, reference should be had to the accompanying
drawings and descriptive matter in which there is illustrated and
described a preferred embodiment of the invention.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
The drawing is a perspective view of a section of a nail holder
formed in accordance with the present invention, and with nails
positioned in holes in the holder.
DETAILED DESCRIPTION OF THE INVENTION
In the drawing a longitudinally extending strip 1 forms a holder
for a plurality of nails 4. A plurality of holes 1a are provided in
the strip for receiving and holding the nails 4. Between each pair
of holes 1a, a transversely extending slot 2 is provided through
the strip 1 with the slot extending across a major portion of the
strip but having its edges spaced inwardly from the longitudinally
extending edges of the strip. The slots 2 divide the strip 1 into a
plurality of sections 3 with each section containing a nail hole 1a
in which a nail is secured. Since the transversely extending slots
do not extend over the full width of the strip, a web 5, 6 is
provided along each of the longitudinally extending edges of the
strip. Accordingly, the location of the slots provides
predetermined breaking points in the strip so that it can be easily
separated into the sections 3.
Spaced recesses 7 are formed along each of the longitudinally
extending edges of the strip and the recesses are provided for
engagement with conventional feed actuating members for serially
aligning each of the nails in the holder strip in position within a
setting device for insertion by a piston driven by an explosive
force. Since such feed actuating members are well known and do not
form a part of the invention, they are not shown.
Each nail 4 has an elongated shank portion and a head 4a extending
transversely from the shank portion. During the nail driving
operation, a piston is explosively propelled within the setting
device and drives the nail forwardly through the holder strip until
the nail head 4a strikes the surface of the strip. When the nail
head contacts the strip, due to the explosive force transmitted to
it, the impact causes the section 3 of the strip between adjacent
slots 2 to separate at the predetermined breaking points from the
remainder of the strip providing a disc or washer about the nail.
Accordingly, if the nail is being used to secure low strength
material, panels or the like to a target material, the disc affords
a relatively large surface area, as compared to the area of the
nail head, for transmitting the impact of the nail to the low
strength material so that it is not damaged as it is secured to the
target material.
As an example, and not in any sense limiting the scope of the
invention, the strip 1 can be made of steel with a thickness of 1.5
to 2 mm. The length of the slots 2 varies in accordance with the
conditions involved and the length can be about 90 to 95 percent of
the width of the strip. The width of the slots 2 is about the same
dimension as the thickness of the strip.
While a specific embodiment of the invention has been shown and
described in detail to illustrate the application of the inventive
principles, it will be understood that the invention may be
embodied otherwise without departing from such principles.
* * * * *