ANDERSON, Scott (7233 Club Court, Roscoe, Illinois, 61073, US)
MONAHAN, Patrick (12986 Duncan Lane, Rockton, Illinois, 61072, US)
ANDERSON, Scott (7233 Club Court, Roscoe, Illinois, 61073, US)
| What is claimed is:
1. A hand tool for installing a collapsible insert characterized by: a sleeve
having an external surface and a throughbore, a threaded portion on the
external surface and a threaded portion in the throughbore; a shaft
having a handle portion proximate a first end, a first threaded portion
which is threadably engaged with the threaded portion in the
throughbore of the sleeve, a second threaded portion proximate a
second, opposite end for threadably engaging the collapsible insert,
wherein threads of the first threaded portion and threads of the second
threaded portion run in opposite directions; a stabilizing handle which
includes a cylindrical portion and a handle portion which extends from
the cylindrical portion, said cylindrical portion including a throughbore,
and a threaded portion in the throughbore of the cylindrical portion of
the stabilizing handle which is threadably engaged with the threaded
portion on the external surface of the sleeve.
2. A hand tool as recited in claim 1, characterized in that said tool is
configured such that a clockwise rotation of the handle portion of the
shaft causes the second end of the shaft to retract into the sleeve, thereby
collapsing the collapsible insert.
3. A hand tool as recited in claim I 5 characterized in that the tool is
configured such that it takes half the number of revolutions of the handle
portion of the shaft to collapse the collapsible insert than it does to
disengage the shaft from the collapsible insert after the collapsible insert
has fully collapsed.
4. A hand tool as recited in claim I 5 characterized in that said tool is
configured such that a clockwise rotation of the handle portion of the
shaft causes the second end of the shaft to retract into the sleeve, thereby
collapsing the collapsible insert, wherein the tool is configured such that
it takes half the number of revolutions of the handle portion of the shaft
to collapse the collapsible insert than it does to disengage the shaft from
the collapsible insert after the collapsible insert has fully collapsed.
5. A hand tool as recited in claim 1, characterized in that the shaft includes
an unthreaded portion which is disposed between the first threaded
portion and the second threaded portion.
6. A hand tool as recited in claim 1, characterized in that the shaft includes
an enlarged diameter portion which is contactably engageable with the
collapsible insert.
. A hand tool as recited in claim 1, characterized in that the sleeve
includes a shoulder which is contactably engageable with the collapsible
insert.
8. A hand tool as recited in claim 1, characterized in that a space and a
groove are provided proximate an end of the sleeve for receiving a
retaining ring and a snap ring, wherein the retaining ring contains and
stabilizes the shaft in the sleeve, and wherein the snap ring contains the
retaining ring in the sleeve.
9. A hand tool as recited in claim 1, characterized in that the threaded
portion on the external surface of the sleeve is only on a portion of the
external surface.
10. A method of installing a collapsible insert characterized by: providing a
hand tool which comprises a sleeve having an external surface and a
throughbore, a threaded portion on the external surface and a threaded
portion in the throughbore, a shaft having a handle portion proximate a
first end, a first threaded portion which is threadably engaged with the
threaded portion in the throughbore of the sleeve, a second threaded
portion proximate a second, opposite end for threadably engaging the
collapsible insert, wherein threads of the first threaded portion and threads of the second threaded portion run in opposite directions, a
stabilizing handle which includes a cylindrical portion and a handle
portion which extends from the cylindrical portion, said cylindrical
portion including a throughbore, and a threaded portion in the
throughbore of the cylindrical portion of the stabilizing handle which is
threadably engaged with the threaded portion on the external surface of
the sleeve, wherein the shaft includes an enlarged diameter portion
which is contactably engageable with the collapsible insert, said tool
bing configured such that a clockwise rotation of the handle portion of
the shaft causes the second end of the shaft to retract into the sleeve,
thereby collapsing the collapsible insert; rotating the handle portion of
the shaft of the hand tool until the second threaded portion extends out
of the sleeve of the hand tool; threading the collapsible insert onto the
second threaded portion of the shaft until the collapsible insert contacts
the enlarged diameter portion of the shaft; rotating the handle portion of
the shaft clockwise, while holding the stabilizing handle, until the
collapsible insert contacts the sleeve; inserting the collapsible insert into
a hole; and further rotating the handle portion of the shaft clockwise,
while holding the stabilizing handle, to cause the collapsible insert to
collapse.
11. A method as recited in claim 10, further characterized by rotating the
handle portion of the shaft in a counter-clockwise direction, while
holding the stabilizing handle, to disengage the second threaded portion
of the shaft from the insert.
12. A method as recited in claim 10, characterized in that the tool is
configured such that it takes half the number of revolutions of the handle
portion of the shaft to collapse the collapsible insert than it does to
disengage the shaft from the collapsible insert after the collapsible insert
has fully collapsed. |
SETTING TOOL
Background
The present invention generally relates to tools and methods for installing one-
piece blind fasteners, such as collapsible inserts, in a workpiece, which inserts are
preferably internally threaded. The present invention more specifically relates to a
hand tool and associated method for installing collapsible inserts.
The present invention is directed at a tool and associated method for installing
one-piece blind fasteners, and specifically collapsible inserts such as is disclosed in
U.S. Patent No. 4,869,629, hereby incorporated herein by reference in its entirety.
U.S. Patent No. 6,447,399 discloses a method of making such a collapsible insert, and
that patent is also hereby incorporated herein by reference in its entirety. As described
in the '629 patent, such collapsible inserts are typically used to join workpieces.
Specifically, the collapsible insert is located on a tool and is inserted in a hole in a
workpiece, and then the tool is actuated causing the insert to collapse on the blind side
of the hole and become installed relative to the workpiece. The insert, as shown in the
accompanying drawings, is internally threaded to facilitate attachment to an externally
threaded element such as a rod, bolt or similar type of fastener or mounting
component. Subsequently, the tool is disengaged from the insert and the second
externally threaded component is threaded into, or otherwise engaged with, the insert.
If a second insert is threaded into the first insert, then the workpiece is threaded into
the second insert.
One application of use for such collapsible inserts is in the construction
industry where the collapsible inserts are installed in metal decking. Specifically, the
collapsible insert is located on a tool and is inserted in a hole in the metal decking.
Then, the tool is actuated, causing the insert to collapse or deform on the blind side of
the hole and become installed relative to the metal decking. Subsequently, the tool is
disengaged from the collapsed insert and a threaded component is threaded into the
insert. Depending upon size, the threaded component may be a section of metal rod,
or an intermediate component with an internally threaded bore, into which the
threaded rod is engaged.
Presently, expensive and somewhat complex automated equipment is used to
install such inserts in a factory environment. The equipment which is typically used to
install such collapsible inserts is impractical for use on the construction job site, due to
the equipment being large and cumbersome. As such, it has not been possible to
install such inserts quickly and easily at a construction job site. There is a need for a
simple, inexpensive installation tool for these collapsible inserts.
Objects and Summary
An object of an embodiment of the present invention is to provide a hand tool
and associated method for installing collapsible inserts, such as that which is disclosed
in U.S. Patent Nos. 4,869,629 and 6,447,399.
Another object of an embodiment of the present invention is to provide a hand
tool and associated method such that it is possible to quickly, easily and economically
install inserts, such as that which is disclosed in U.S. Patent Nos. 4,869,629 and
6,447,399, at a construction job site, without having to use heavy, expensive
automated equipment.
Yet another object of an embodiment of the present invention is to provide that
collapsible inserts, such as that which is disclosed in U.S. Patent Nos. 4,869,629 and
6,447,399, can be installed at a construction job site environment at a minimal tool
cost. Briefly, and in accordance with at least one of the foregoing objects, an
embodiment of the present invention provides a tool for installing collapsible inserts.
The tool includes a stabilizing handle which is threaded onto a tool body with
preferably a left hand thread. The tool body is, in turn, threaded onto a tool shaft
which includes a second handle, referred to as an actuating handle, and a threaded end
portion. In use, a collapsible insert is threaded onto the tool shaft end portion, and the
insert is positioned in a hole in a workpiece. The actuating handle of the tool is then
rotated, while holding the stabilizing handle, to cause the threaded end, with the
collapsible insert attached, to rotate relative to the insert, wherein the end of the insert
moves axially relative to the threaded end, thus causing the insert to collapse, thereby
installing the insert relative to the workpiece. Once the insert has been collapsed using
the tool, the actuating handle is rotated in the opposite direction, while holding the
stabilizing handle, to disengage the threaded end portion of the tool from the insert. In
the preferred embodiment, the thread on the stabilizing handle and that on the tool
body, to which the stabilizing handle is engaged, are left hand threads. With this
arrangement, the rotation of the actuating handle can be clockwise and will produce
collapsing of the insert with preferably three (3) to four (4) revolutions and subsequent
removal of the tool with preferably approximately seven (7) revolutions.
Brief Description of the Drawings
The organization and manner of the structure and operation of the invention,
together with further objects and advantages thereof, may best be understood by
reference to the following description, taken in connection with the accompanying
drawings (not to scale), wherein like reference numerals identify like elements in
which:
Figure 1 is a side view of an installation tool which is in accordance with an
embodiment of the present invention;
Figure 2 is a side view of a tool shaft component of the installation tool which
is shown in Figure 1;
Figure 3 is a side view of a tool body or sleeve component of the installation
tool which is shown in Figure 1 ;
Figure 4 is a cross-sectional view of the tool body shown in Figure 3, taken
along line 4-4 of Figure 3;
Figure 5 is a perspective view of a stabilizing handle component of the
installation tool which is shown in Figure 1 ;
Figure 6 is a side view of the stabilizing handle shown in Figure 5;
Figure 7 is a view showing the tool shaft threadably engaged in the tool body,
wherein the tool body is shown in cross-section;
Figures 8 shows the first step of a method which is in accordance with an
embodiment of the present invention, wherein a conventional drill is used to drill a
hole in a workpiece;
Figure 9 shows a subsequent step of the method, wherein the tool shaft is
rotated until a threaded shaft portion extends fully out of the tool body;
Figure 10 shows a subsequent step of the method, wherein a collapsible insert
is threaded onto the threaded shaft portion of the tool shaft until the collapsible insert
contacts an enlarged portion of the tool shaft;
Figure 11 provides a larger view which shows the collapsible insert in contact
with the enlarged portion of the tool shaft, and showing the insert in cross-section;
Figure 12 shows a subsequent step of the method, wherein the tool shaft is
rotated until the collapsible insert contacts the tool body;
Figure 13 shows a subsequent step of the method, wherein the tool is used to
insert the collapsible insert into the hole which has been drilled in the workpiece;
Figure 14 provides a larger view which shows the collapsible insert inserted
into the hole in the workpiece, and showing the insert in cross-section;
Figure 15 shows a subsequent step of the method, wherein the tool shaft is
being rotated to cause the collapsible insert to collapse;
Figure 16 provides a larger view which shows, in cross-section, the insert after
it has collapsed, and shows the tool still engaged with the insert;
Figure 17 shows a subsequent step of the method, wherein the tool shaft is
being rotated in the opposite direction to disengage from the insert;
Figure 18 provides an enlarged view, in cross-section, of the insert after it has
collapsed, and after the tool has been disengaged;
Figure 19 shows a subsequent step which can be performed, wherein an insert
or hanger is threadably inserted into the collapsed insert;
Figure 20 shows a step subsequent to that which is shown in Figure 19, wherein
a threaded rod is threaded into the hanger; and
Figure 21 shows a step which can be performed instead of that which is shown
in Figures 19 and 20 (in cases where the dimensions of a threaded rod are consistent
with the dimensions of a threaded bore of the collapsed insert), wherein the threaded
rod is directly engaged with the collapsed insert without need for a hanger.
Description
While the present invention may be susceptible to embodiment in different
forms, there are shown in the drawings, and herein will be described in detail,
embodiments thereof with the understanding that the present description is to be
considered an exemplification of the principles of the invention and is not intended to
limit the invention to that as illustrated and described herein.
An embodiment of the present invention provides a hand tool 20 and associated
method for installing collapsible inserts, such as that which is disclosed in U.S. Patent
Nos. 4,869,629 and 6,447,399. As such, it is possible to quickly and easily install the
inserts at a construction job site, with minimal tool cost, and without having to use
heavy, expensive automated equipment.
As shown in Figure 1, the tool 20 consists of the following components: a tool
shaft 22, a tool body or sleeve 24, and a stabilizing handle 26, wherein the tool body
24 is threadably engaged with both the tool shaft 22 and the stabilizing handle 26.
As shown in Figure 2, the tool shaft 22 includes a threaded portion 28
proximate one end 30. Specifically, the threaded portion 28 may consist of male 1/4-
20 right hand threads which are configured to engage corresponding female threads 32
in a collapsible insert 34, as will be described later herein. At the opposite end 36 of
the tool shaft 22 is a T-handle portion 38. While the Figures illustrate the handle
portion 38 being integral with the shaft portion 40, it is possible to provide that the
handle portion 38 is a separate piece which is secured to the shaft portion 40. The tool
shaft 22 also includes another threaded portion 42, which preferably consists of left
hand threads 44, and an enlarged diameter portion 46 between the two threaded
portions 28 and 42. The enlarged diameter portion 46 is preferably unthreaded.
As shown in Figures 3 and 4, the tool body or sleeve 24 is generally cylindrical
and includes an enlarged head portion 48, which provides a shoulder 49, as well as an
external threaded portion 50 along at least part of its external surface 52. As shown in
Figure 4, the tool body 24 also includes an internal threaded portion 54. Preferably,
the internal threaded portion 54 includes left hand threads 56 much like the threaded
portion 42 of the tool shaft 22. While the external threaded portion 50 of the tool body
24 is configured to threadably receive the stabilizing handle 26, the internal threaded
portion 54 of the tool body 24 is configured to threadably receive the threaded portion
42 which is on the tool shaft 22. As will be discussed below, the fact that the threaded
portion 42 on the tool shaft 22 and the internal threaded portion 54 of the tool body 24
includes left hand threads 44, 56 provides that the T-handle 38 is rotated clockwise, as
opposed to having to be rotated counter-clockwise, to collapse the collapsible insert
34. As also shown in Figure 4, proximate an end 58 of the tool body 24 is a space 60
for receiving a retaining ring (not shown) as well as a groove 64 for receiving a snap
ring (not shown). The retaining ring is used to contain and stabilize the tool shaft 22
in the tool body 24, and may comprise a conventional flat washer. The snap ring is
used to contain the retaining ring in the tool body 24.
Figures 5 and 6 illustrate the stabilizing handle component 26 of the tool 20.
As shown, the handle 26 includes a cylindrical portion 68 which includes throughbore
69 having an internal thread 70. A handle portion 72 extends from the cylindrical
portion 68 and is configured for gripping by a user during collapsing of the collapsible
insert 34, as will be described in more detail hereinbelow. The internal thread 70 of
the handle component 26 is configured for threadably engaging the external thread
portion 50 which is provided on the tool body 24 (see Figures 1, 3, 4 and 7).
To assemble the tool 20, the shaft portion 40 of the tool shaft 22 is inserted
through the snap ring and retaining ring, and the tool shaft 22 is threaded into the tool
body 24, as shown in Figure 7. Then, the retaining ring and snap ring are engaged in
the space 60 and groove 64 in the tool body 24, and the stabilizing handle 26 is
threaded onto the tool body 24, such that the tool 20 is as shown in Figure 1.
A method of using the tool 20 to install a collapsible insert 34 (i.e., to collapse
the insert such that the insert becomes installed in a workpiece) will now be described.
As shown in Figure 8, initially a conventional drill 100 is used to drill a hole 102 in a
workpiece 104, taking care not to over-penetrate. For example, a 25/64 inch drill bit
108 may be used to drill a hole in steel. Once the hole 102 has been drilled, the handle
38 of the tool shaft 22 of the tool 20 is rotated until the threaded shaft portion 28
extends fully out of the tool body 24, as shown in Figure 9. Next, as shown in Figure
10, a collapsible insert 34, such as a collapsible insert which is consistent with U.S.
Patent Nos. 4,869,629 and U.S. Patent No. 6,447,399, is threaded onto the threaded
shaft portion 28 of the tool shaft 22 until the collapsible insert 34 contacts the enlarged
diameter portion 46 of the tool shaft 22. As such, the enlarged diameter portion 46 of
the tool shaft 22 acts as a mechanical stop when the collapsible insert 34 is threaded
onto the threaded portion 28 at the end 30 of the tool shaft 22. Figure 11 shows the
collapsible insert 34 in contact with the enlarged diameter portion 46 of the tool shaft
22.
Subsequently, as shown in Figure 12, the handle 38 of the tool shaft 22 is
rotated, while holding the stabilizing handle 26, until the collapsible insert 34 contacts
the tool body 24. Then, as shown in Figure 13, the tool 20 is used to insert the
collapsible insert 34 into the hole 102 which has been drilled in the workpiece 104.
Figure 14 provides a larger view of the collapsible insert 34 inserted into the hole 102
in the workpiece 104.
As shown in Figure 15, the handle 38 of the tool shaft 22 is then rotated, while
holding the stabilizing handle 26, to cause the collapsible insert 34 to collapse on the
other side 110 of the workpiece 104, thereby installing the insert 34 relative to the
workpiece 104. To collapse the insert 34, the handle 38 of the tool shaft 22 is rotated
until very firm pressure is felt. Because the threads 44 and 56 provided on the tool
shaft 22 and in the tool body 24 are left hand threads, the collapsible insert 34 is
collapsed by rotating the handle 38 of the tool shaft 22 clockwise. However, the
threads 44 and 56 can instead be provided as being right hand threads, in which case
the collapsible insert 34 would be collapsed by rotating the handle 38 of the tool shaft
22 counter-clockwise. Regardless, the tool shaft's movement away from the
workpiece 104 causes the collapsible insert 34 to be compressed which in turn spreads
its four legs 112 out to "set" the insert relative to the workpiece. This "setting" is
accelerated by the internal threads 32 (such as 1/4-20 threads) of the collapsible insert
34 advancing up the tool shaft 22. The effect of this can be shown by the fact that it
preferably takes only 3 1 A revolutions to fully "set" the collapsible insert 34 and it
takes approximately 7 1 A revolutions to disengage the tool 20 from the collapsible
insert 34 after the insert 34 has been installed. Figure 16 provides a larger view which
shows, in cross-section, the insert 34 after it has collapsed, and shows the tool 20 still
engaged with the insert 34.
As shown in Figure 17, once the insert 34 has been collapsed using the tool 20,
the handle 38 of the tool shaft 22 is rotated in the opposite direction (i.e. counter¬
clockwise), while holding the stabilizing handle 26, to disengage the threaded portion
28 of the tool shaft 22 from the insert 34. Figure 18 provides an enlarged view, in
cross-section, of the insert 34 after it has collapsed, and after the tool 20 has been
disengaged.
Once the collapsible insert 34 has been collapsed or installed in the hole 102 in
the workpiece 104, an insert or hanger 106 (not drawn to scale) is threadably inserted
into the collapsed insert 34, as shown in Figure 19, wherein the hanger 106 includes an
externally threaded shaft portion 120 and an internally threaded head portion 122.
Then, a second workpiece, such as a threaded rod 124 (not drawn to scale), is threaded
into the hanger 106, as shown in Figure 20. As an example, the hanger 106 may
include 1/4 inch-20 external threads and 3/8 inch- 16 threads, and the collapsible insert
34 may include 1/4 inch-20 internal threads.
Alternatively, as shown in Figure 21, in cases where the dimensions of the
second workpiece (i.e., a threaded rod) are consistent with the threads 32 in the
collapsed insert 34, the threaded rod 124 (not drawn to scale) can be directly
threadably engaged with the collapsed insert 34, without need for a hanger. In the
example given, this would be when the threaded rod is provided with a 3/8 inch- 16
external thread.
The tool and method which have been described make it possible to quickly and
easily install collapsible inserts at a construction job site, with minimal tool cost, and
without having to use heavy, expensive automated equipment.
While embodiments of the present invention are shown and described, it is
envisioned that those skilled in the art may devise various modifications of the present
invention without departing from the spirit and scope of the disclosure.
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