U.S. patent number 3,613,904 [Application Number 04/857,412] was granted by the patent office on 1971-10-19 for vacuum holder and control assembly.
Invention is credited to Leland F. Blatt.
United States Patent |
3,613,904 |
Blatt |
October 19, 1971 |
VACUUM HOLDER AND CONTROL ASSEMBLY
Abstract
A work-engaging vacuum gripper including vacuum means for
creating a vacuum within a vacuum cup and adapter assembly
adjustably mounted upon a power-pivoted boom assembly projecting
from a combination jaw body and actuating unit whereby
longitudinally reciprocal power means from said actuating unit
acting through said jaw body effects corresponding pivotal
movements of the jaw arm and attached boom assembly which
adjustably mounts the vacuum-operated workpiece-engaging
gripper.
Inventors: |
Blatt; Leland F. (Warren,
MI) |
Family
ID: |
25325939 |
Appl.
No.: |
04/857,412 |
Filed: |
September 12, 1969 |
Current U.S.
Class: |
414/737;
294/64.2 |
Current CPC
Class: |
B65G
47/915 (20130101) |
Current International
Class: |
B65G
47/91 (20060101); B65g 047/91 () |
Field of
Search: |
;214/1BS,1B
;294/64A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Sheridan; Robert G.
Assistant Examiner: Abraham; George F.
Claims
Having described my invention, reference should now be had to the
following claims.
I claim:
1. In combination with a material-handling apparatus, a jaw body
having an internal longitudinally extending guide slot;
a jaw arm within and pivotally mounted on said jaw body around a
fixed pivot axis and projecting from said jaw body;
a boom assembly extending forwardly of said arm and adjustably
secured thereto and including a bracket arm;
a spreader adjustably secured to said bracket arm;
a venturi containing cup mounting body adjustably secured to said
spreader;
a vacuum cup assembly including an adapter secured to said
venturi-containing cup mounting body;
a clevis longitudinally movably positioned within said jaw body
guide slot and adapted for connection to a reciprocal power source;
and
a link pivotally connected at one end to said clevis around a pivot
axis lying in a plane containing said fixed pivot axis, the other
end of said link being pivotally connected to said jaw arm
rearwardly of and offset from said fixed pivot axis whereby
reciprocal movement of said clevis effects corresponding pivotal
movement of said jaw arm around said fixed pivot axis by
displacement of said link pivot axis along said plane containing
said fixed pivot axis.
2. In the combination of claim 1, said boom assembly including a
clamp secured upon one end of said jaw arm;
a rod adjustably secured to said clamp and extending longitudinally
outward of said arm at its end and mounting said bracket arm.
3. In the combination of claim 2, the mounting of said venturi
containing cup mounting body including a bracket adjustably secured
to said spreader.
Description
BACKGROUND OF INVENTION
Heretofore, vacuum-operated workpiece-engaging and holding cups
have been provided for gripping and transporting a workpiece with
normal power means for locating the vacuum gripper with respect to
a pair of right angularly related planes such as shown in my U.S.
Pat. No. 3,349,927, dated Oct. 31, 1967 entitled Material Handling
Equipment.
Heretofore, there have been provided vacuum-operated
workpiece-engaging cups with a venturi control such as shown in my
copending patent application, Ser. No. 814,687 filed Apr. 9, 1969
entitled Vacuum Cup Type Work Gripping Means.
It is an object of the present invention to provide an improved
vacuum cup workpiece gripper with power operated pivotal boom
assembly for positioning the vacuum cup gripping device in
workpiece-engaging position and for pivotally retracting the same
to a secondary position effecting corresponding movements of a work
piece connected thereto.
These and other objects will be seen from the following
specification and claims in conjunction with the appended drawing
in which:
FIG. 1 is a side elevational view of the present vacuum gripper and
boom assembly partly broken away for illustration.
FIG. 2 is a fragmentary end elevational view thereof.
FIG. 3 is a plan view thereof.
DETAILED DESCRIPTION
Referring to the drawing, the present vacuum gripper and boom
assembly includes jaw assembly 11 with connected actuating unit 12,
boom assembly 13, bracket assembly 14 and vacuum cup assembly
15.
The aforesaid jaw assembly includes jaw body 16 having at one end
apertured mounting flange 17 which employing fasteners 18 is
adjustably secured to a corresponding flange 19 of the actuating
unit 12.
The rod end 21 or end portion of a piston rod forming a part of
power-operated cylinder and piston assembly, axially extends
through the actuating unit 12 with the end portion of said rod end
as in FIG. 1 secured to reciprocal clevis 22.
Said clevis is guidably positioned for reciprocal movements within
a corresponding internal slot 22' shown in FIG. 2.
An upper jaw plate 23, or a pair of said plates spaced apart by
suitable spacers are pivotally mounted as at 24 upon said jaw body
project forwardly thereof.
One or a pair of links 25, FIG. 1, pivotally connected at 26 to one
end of clevis 22 and at their respective other ends are pivotally
connected at 27 to an end portion of jaw arms 23.
In the illustrative embodiment there is shown schematically, an
inactive lower jaw 28 similarly pivoted or otherwise connected to
the jaw body 16 as at pivot 24. An additional set of corresponding
links 25 are adapted to pivotally interconnect between said clevis
and end portions of the secondary or lower jaw element 28 in the
same manner as the pivot 27.
Upon the reciprocal movements of the piston rod end 21 in a manner
forming no part of the present application, there is effected a
corresponding reciprocal movement of clevis 22 in turn effecting
pivotal movements of the jaw arms 23 as in the arc designated at
29.
Boom assembly 13 upon the forward end of arms 23 includes a clamp
30 slit at 31 and by fasteners 32 adapted to adjustably engage one
end of the boom rod 33. Said rod extends forwardly of arms 23,
longitudinally thereof and at its outer end, mounts bracket arm 34.
Said bracket arm, split at 35, employing fasteners as at 36,
adjustably mounts spreader bar 37.
One or a pair of vacuum cup assemblies 15 are adjustably mounted
upon the spreader bar 37. One of such assemblies is described with
respect to FIGS. 2 and 3. Mounted upon spreader 37 is the bracket
assembly 14, FIG. 2. A venturi cup body mount 38 includes a tapered
or cone assembly 39 which projects within a corresponding bore in
bracket assembly 40 and is adjustably secured thereto as by
fastener 41.
The venturi cup body assembly also includes the venturi assembly 42
including pressure air inlet port 43 adapted for connection to a
source of air under pressure, suitable outlet 44 to atmosphere and
a passage 45 for communicating low-pressure condition to the
interior of the vacuum cup 47.
A suitable adapter assembly 46 is adjustably mounted with respect
to the cup body 38 for mounting the vacuum cup 47 and for
establishing vacuum communication thereinto.
The detail and construction of the vacuum cup body and venturi
structure is itself, not a part of the present application, and is
disclosed in the aforesaid copending patent application.
OPERATION
In a conventional manner, the actuating unit 12 employing its
support rod 20 may be movably positioned longitudinally through the
piston rod 21 which after a predetermined longitudinal feed, is
adapted for operating the actuating unit 12 which in turn, controls
reciprocal movements of the clevis 22.
Said clevis connected by links 25 to the arms 23 is adapted on
reciprocal movement to effect corresponding arcuate power
adjustments of the boom assembly arm 33.
With the vacuum cup assembly suitably bracketed and secured to the
outer end of the boom construction, it appears that the boom
assembly 33 may be tilted to a workpiece-engaging position shown at
29 so that the vacuum cup, when properly activated, will engage and
secure to a workpiece. The boom assembly 33 is thus adapted to be
pivoted upwardly to the position shown in FIG. 1 for movably
positioning the workpiece secured thereby.
A pair of said vacuum cup assemblies may be employed as shown in
15, FIG. 3, for the purpose of more effectively engaging a
workpiece to be transported or removed to and from a machine tool
or other jig or assembly.
* * * * *