U.S. patent application number 12/331916 was filed with the patent office on 2010-06-10 for power tool for stainless steel metal locking ties.
This patent application is currently assigned to Panduit Corp.. Invention is credited to Bon B. Sledzinski.
Application Number | 20100139805 12/331916 |
Document ID | / |
Family ID | 42173965 |
Filed Date | 2010-06-10 |
United States Patent
Application |
20100139805 |
Kind Code |
A1 |
Sledzinski; Bon B. |
June 10, 2010 |
Power Tool for Stainless Steel Metal Locking Ties
Abstract
A power tool for installing a metal locking tie is disclosed.
The power tool includes a body and a power chassis. The body of the
tool includes a gear carrier, a tensioning mechanism and a cutting
mechanism. The gear carrier is positioned in the tool body and the
tensioning mechanism is mounted in the gear carrier. The cutting
mechanism engages the gear carrier. As the tie is tensioned, the
gear carrier moves linearly in the tool body to cut the tensioned
tie.
Inventors: |
Sledzinski; Bon B.;
(Westmont, IL) |
Correspondence
Address: |
PANDUIT CORP.
LEGAL DEPARTMENT - TP12, 17301 SOUTH RIDGELAND AVENUE
TINLEY PARK
IL
60477
US
|
Assignee: |
Panduit Corp.
Tinley Park
IL
|
Family ID: |
42173965 |
Appl. No.: |
12/331916 |
Filed: |
December 10, 2008 |
Current U.S.
Class: |
140/93.2 |
Current CPC
Class: |
B65B 13/027 20130101;
B65B 13/185 20130101 |
Class at
Publication: |
140/93.2 |
International
Class: |
B21F 9/02 20060101
B21F009/02 |
Claims
1. A tool for installing a metal locking tie, the tool comprising:
a tool body: a gear carrier positioned in the tool body; a
tensioning mechanism mounted in the gear carrier; and a cutting
mechanism engaging the gear carrier, whereby the gear carrier moves
linearly in the tool body once the tie is tensioned to cut the
tie.
2. The tool of claim 1, further comprising a toggle mechanism
positioned in the tool body, wherein the toggle mechanism holds the
gear carrier in place until a toggle holding force has been
exceeded.
3. The tool of claim 2, wherein the toggle holding force is spring
loaded.
4. The tool of claim 1, further comprising a toggle mechanism
including a toggle link and a lever arm, wherein the toggle link
engages the lever arm.
5. The tool of claim 4, wherein the lever arm includes a
horizontally extending portion, a lever arm pivot and a vertically
extending portion, the vertically extending portion includes a
detent for housing the toggle link.
6. The tool of claim 4, wherein the toggle link includes a torsion
spring.
7. The tool of claim 1, wherein the cutting mechanism includes a
cutting lever with a roller and a cutter, whereby the roller
engages the gear carrier to actuate the cutter.
8. The tool of claim 1, wherein the tensioning mechanism includes a
worm actuating a worm gear to rotate a mandrel.
9. The tool of claim 1, wherein the body is attached to a power
chassis by a swivel connector.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a power tool for stainless
steel metal locking ties, and more particularly to a power tool for
stainless steel metal locking ties having a power source to tension
the locking tie and to cut the locking tie.
BACKGROUND OF THE INVENTION
[0002] As is well known to those skilled in the art, cable ties or
straps are used to bundle or secure a group of articles such as
electrical wires and cables. Cable ties of conventional
construction include a cable tie head and an elongated tail
extending therefrom. The tail is wrapped around a bundle of
articles and thereafter inserted through the passage in the head.
The head of the cable tie typically supports a locking element,
which extends into the head passage and engages the body of the
tail to secure the tail to the head.
[0003] In practice, the installer manually places the tie about the
articles to be bundled and inserts the tail through the head
passage. At this point, a cable tie installation tool is used to
tension the tie to a predetermined tension. The tools of the prior
art, although capable of tensioning and thereafter severing the
excess portion of the cable tie, typically have several
disadvantages therewith. As a result, it is desirable to provide an
improved metal tie tool having a single power source for tensioning
and cutting the locking tie.
SUMMARY OF THE INVENTION
[0004] The present invention is directed towards a power tool for
installing a metal locking tie. The tool includes a body and a
power chassis. A gear carrier is positioned in the body and a
tensioning mechanism is mounted in the gear carrier. A cutting
mechanism is also positioned in the tool body and positioned to
engage the gear carrier. As the tie is tensioned, the gear carrier
moves linearly in the tool body to cut the tensioned tie.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] FIG. 1 is a front left side perspective view of the power
tool for stainless steel metal locking ties of the present
invention:
[0006] FIG. 2 is a front left side perspective view of the power
tool for stainless steel metal locking ties of FIG. 1 with the tool
in a rotated position:
[0007] FIG. 3 is a right side perspective view of the power tool of
FIG. 1 with a portion of the tool removed:
[0008] FIG. 4 is a right side view of the power tool of FIG. 3;
[0009] FIG. 5 is a front perspective view of the gear carrier in
the power tool of FIG. 3;
[0010] FIG. 6 is a right side perspective view of the worm mounted
to the gear carrier in the power tool of FIG. 3:
[0011] FIG. 7 is a side perspective view of the toggle mechanism of
FIG. 4;
[0012] FIG. 8 is a partial right side perspective view of the tool
body of FIG. 1:
[0013] FIG. 9a is a top view of the gear carrier and the toggle
mechanism of FIG. 3;
[0014] FIG. 9b is a side view of the gear carrier and the toggle
mechanism of FIG. 9a;
[0015] FIG. 10 is a side view of the gear carrier and the toggle
mechanism of FIG. 9a with the mandrel beginning to wind the
stainless steel tie:
[0016] FIG. 11 is a side view of the gear carrier and the toggle
mechanism of FIG. 9a with the detent setting of the toggle
mechanism being overcome:
[0017] FIG. 12 is a side view of the gear carrier and the toggle
mechanism of FIG. 9a with the tie being tensioned and the gear
carrier moving forward to cut the stainless steel metal locking
tie; and
[0018] FIG. 13 is a side view of the gear carrier and the toggle
mechanism of FIG. 9a returned to the starting position after the
tie has been cut.
DETAILED DESCRIPTION
[0019] FIG. 1 illustrates the portable power tool 20 for stainless
steel metal locking ties 220 of the present invention. As discussed
below, the power tool 20 includes an adjustable tension setting and
an automatic cut-off mechanism operated by the same power source.
The tool 20 has a tool body 30 with a nose 32 at the front of the
tool body 30, a power chassis 34 for housing a battery and a handle
36. The tool body 30 is attached to the power chassis 34 by a
swivel connector 38. The swivel connector 38 enables the tool body
30 and the power chassis 34 to be rotated with respect to one
another for ease of use. As a result, the operator may rotate the
tool body 30 to position the tool at different angles to install
the stainless steel locking ties.
[0020] The tool body 30 also includes a worm 52, a worm gear 54, a
worm gear shaft 56 and a mandrel 58 for tensioning the stainless
steel locking tie 220 (see FIGS. 9a-13). The tool nose 32 includes
a cutting mechanism 200 for cutting the stainless steel locking tie
220 (see FIGS. 9b-13).
[0021] As illustrated in FIGS. 3-6, the tool 20 includes a gear
carrier 50 which moves linearly in the tool body 30 along a carrier
guide 51 toward the nose 32 of the tool 20. The worm 52 is mounted
on the worm shaft 53 (see FIG. 6). The worm shaft 53 is mounted in
the tool body 30 and ends in a hexagonal driver which fits into the
output shaft of the power chassis 34 (not shown). The worm gear 54,
worm gear shaft 56 and mandrel 58 are mounted in the gear carrier
50 and positioned such that the worm 52 engages the worm gear 54.
As illustrated in FIG. 9a. the mandrel 58 is part of the worm gear
shaft 56. As illustrated in FIGS. 1-3, the gear carrier 50 with the
worm gear 54 and worm gear shaft 56 are housed in the tool body 30
while the mandrel 58 extends from the tool body 30.
[0022] The gear carrier 50 can move linearly toward the front of
the tool, but is held in place in the tool body 30 by a spring
loaded toggle mechanism 100 (see FIG. 7). The toggle mechanism 100
includes a toggle link 102 with a torsion spring 114 (see FIGS. 3
and 4) and a lever arm 120 with a lever arm pivot 126. The lever
arm pivot 126 is fixed in the stationary plate 140. The lever arm
120 is generally L-shaped with a horizontally extending portion 122
and a generally vertically extending portion 128. The lever arm
pivot 126 is located at the intersection of the horizontally
extending portion 122 and the vertically extending portion 128. The
vertically extending portion 128 includes a detent pocket 130.
[0023] As illustrated in FIGS. 3-5, the toggle link 102 is located
at an end of the gear carrier 50 opposite the worm gear 54, worm
gear shaft 56 and mandrel 58. The toggle link 102 includes a first
end 104 and a second end 106. The first end 104 of the toggle link
102 pivots about a rod 108 that is mounted to the gear carrier 50.
A torsion spring 114 is positioned on the rod 108. The second end
106 of the toggle link 102 has two rollers 110 which are free to
rotate on pin 112. Both of the rollers 110 rest on a stationary
plate 140 that is generally vertically orientated and attached to
the tool body 30. A portion of pin 112 rests in the detent pocket
130 in the vertically extending portion 128 of the lever arm
120.
[0024] When the gear carrier 50 and toggle link 102 are in the
starting position, the torsion spring 114 presses both rollers 110
against the stationary plate 140 which provides a force reduction
on the pin 112 in the detent pocket 130. The toggle link 102 is
limited to a minimum rotational angle of no more than six degrees
with respect to the linear movement of the gear carrier 50. By
limiting the angle of the toggle link 102 to no more than six
degrees, or nearly in-line, with the line of force exerted by the
stainless steel locking tie 220, the force is reduced and only a
small component of that force is resisted by the pin 112 in detent
pocket 130.
[0025] As illustrated in FIG. 8, the tool body 30 also houses a
spring loaded plate 150 and an actuator pin 154 for adjusting the
tension setting. The actuator pin 154 is guided linearly in a slot
in the tool body 30 and can be moved manually to adjust the detent
force. The spring loaded plate 150 includes springs 152 that force
the plate 150 to counteract the rotational force exerted by the
toggle link 102 on the lever arm 120. The tension setting can be
adjusted by moving the actuator pin 154 (FIG. 4) linearly along the
load plate 150 thereby varying the moment arm between the lever arm
pivot 126 and the point the load plate force is applied. The
horizontally extending portion of the lever arm may also include a
pocket 124 (sec FIG. 7). The pocket 124 houses the actuator pin
when it is desirable to remove the spring load from the lever arm
120.
[0026] FIGS. 9-13 illustrate the operation of the power tool of the
present invention. FIGS. 9a and 9b illustrate the gear carrier 50
and the toggle mechanism 100 in a starting position before the tool
20 begins to tension the stainless steel tie 220. Once the tool is
actuated, the worm 52 engages the worm gear 54 thereby rotating the
worm gear 54, worm gear shaft 56 and mandrel 58. As illustrated in
FIG. 9b, the stainless steel tie 220 has been inserted and wound on
the mandrel 58. The gear carrier 50 is held in place by the toggle
mechanism 100. As illustrated in FIGS. 10-13, the gear carrier 50
moves linearly toward the front of the tool as the tie 220 is
tensioned around the mandrel 58 and the toggle mechanism 100
detents.
[0027] As discussed above, the torsion spring 114 presses the
toggle link rollers 110 against the generally vertically orientated
stationary plate 140. The orientation of the stationary plate 140
provides a force reduction on the toggle mechanism detent. The pin
112 of the toggle link 102 is positioned in the detent pocket 130
of the vertical portion 128 of the lever arm 120.
[0028] As illustrated in FIGS. 9b and 10, the gear carrier 50 is
positioned in a starting position located a distance A from the
nose 32 of the tool 20. The worm 52 drives the worm gear 54
rotating the worm gear shaft 56 and mandrel 58. As the mandrel 58
rotates, it winds the stainless steel tie 220 to tension the tie
220. As the mandrel 58 tensions the tie 220, a linear force is
exerted on the gear carrier 50.
[0029] FIG. 11 illustrates the mandrel 58 continuing to tension the
tie 220. The linear force exerted on the gear carrier 50 begins to
overcome the spring load on the toggle mechanism 100. The pin 112
on the end of the toggle link 102 forces the lever arm 120 to tilt
as the pin 112 detents out of the detent pocket 130 in the vertical
portion 128 of the lever arm 120. As a result, the gear carrier 50
is now positioned at a distance A-B from the nose 32 of the tool
20. As the gear carrier 50 is pulled forward toward the front of
the tool nose 32, the cutting mechanism 200 is actuated.
[0030] The cutting mechanism 200 is located in the nose 32 of the
tool 20. As illustrated in FIGS. 9b-13, the cutting mechanism 200
includes a cutter 208, a cutter lever 204 and a roller 206. The
cutter 208 and the roller 206 are positioned at opposite ends of
the cutter lever 204. The front of the gear carrier 50 includes a
ramp 202. The ramp 202 is designed to actuate the cutter 208 via
the roller 206 at the opposite end of the cutter lever 204. As the
gear carrier 50 is pulled forward, the roller 206 travels along the
ramp 202 raising the cutter lever 204 to enable the cutter 208 to
cut the tie 220.
[0031] FIG. 12 illustrates the mandrel 58 further winding the
stainless steel tie 220 and the gear carrier 50 pulled closer to
the front of the tool 20 such that the gear carrier 50 is
positioned at a distance A-C from the nose 32 of the tool 20.
During the forward motion of the gear carrier 50, the worm gear 54
moves linearly along the worm 50. The worm gear 54 continues to
move along the worm 50 until the stainless steel tie 220 is
completely cut.
[0032] After the tie 220 is cut, the tensioning force which pulled
the gear carrier 50 forward is removed. As a result, the torsion
spring 114 is now able to rotate the toggle link 102 back to the
nearly horizontal position, exerting a linear force against the
stationary plate 140 and moving the gear carrier 50 back to the
starting position. As the toggle link 102 rotates back to the
starting position, the end of pin 112 falls back into the detent
pocket 130. As the gear carrier 50 moves back to the starting
position, the worm gear 54 walks back along the worm 52.
[0033] FIG. 13 illustrates the gear carrier 50 returned to the
starting position where the gear carrier 50 is positioned at a
distance A away from the nose 32 of the tool 20.
[0034] Furthermore, while the particular preferred embodiments of
the present invention have been shown and described, it will be
obvious to those skilled in the art that changes and modifications
may be made without departing from the teaching of the invention.
The matter set forth in the foregoing description and accompanying
drawings is offered by way of illustration only and not as
limitation. The actual scope of the invention is intended to be
defined in the following claims when viewed in their proper
perspective based on the prior art.
* * * * *