US1719125A - Safety guard for presses - Google Patents

Description

July 2, 1929- G. s. NEI-:LEY 1,719,125 SAFETY GUARD FOR PRESSES Filed may 22, 1926 2 sneetwsnee 1 @wdr/Ww@ vJuly 2, 1929 G. s. NEELEY SAFETY GUARD `FOR PRESSES 2 sneetsfsheex 2 Filed May 22, 1926 Patented July 2, 1929.

UNITED `STATES l 1,719,125 PATENT OFFICE..

GEORGE S. NEELEY, 0F HARTFORD, ILLINOIS, ASSIGNOR- OF ONE-HALF TO GRIFFIN VVATKINS, OF ALTON, ILLINOIS.

sAFnrY eUAn-n ron rnnssns.

Application filed May 22, 1926. Serial No. 110,917.

This invention relates to new and useful improvements 1n safety guards ior presses and particularly :tor leather presses.

In the history of the operation of embossing presses, and particularly leather presses,

there arc recorded many instances of the press operators losing their hands or fingers due to the hazardous operations of such presses.

The primary object of the invention is to provide a safety guard comprisin,f ,r automatically operable means which are powerful to bodily move the press operator away from the press, thereby providing; assurance that the press operator is always clear of the worln ing' jaws of the press during` the closing,1 operation of the press jaws.

Further objects of the invention are to provide an automatic safety `guard that is positive in its action and provides absolute safety to the operator.

Still further objects of the invention are to provide a safety guard having, a minimum number of working parts and requiring very little attention, thereby reducing` the 1naintenance expense to minimum.

Other objects of the invention are to provide a safety guard `that is adjustable to regulate 'the throwrof` the safety bar with respect to the size of the operator so as to `bodily move any sized operator a safe distancefrom the jaws durimr` the pressingl operation,

Still other objects of the invention are to produce a safety guard that of simple construction, provides easy access to the worlring;r parts of the press and which isarranued so as to allow the use of materials of great strength, thereby providing a safety device that is reliable in operation and. will not become easily bent, broken, or rendered inoperative.

With. these and other objects in view, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illust-rated in the accompanying` drawings, in which- Figure 1 is a front elevational view` of a press showing the safety guard applied thereto.

Figure 2 is an end elevational view of same.

Figure 3 is an end elevational view of a modified form of my invention.

Figure f1 is an end elevational view of still another modified form of my invention.

Figure 6 is a. cross sectional view taken vien7 Figure 8 is a cross sectional view taken on i line 8'-8 of Figure 2.

Referring by numerals to the accompanying drawings, 10 indicates a press having a stationary jaw 11, aimovable j avv 12, and front and rear tables 14. In the operation ofthe press, work material, such as leather, is placed on table 14 and moved on to the jaw 12 by the operator whereupon the press is operated by suitable mechanism, not shown, to bring the movable jaw 12 against jaw 11 and place the work positioned therebetween under pressure. In arranging the work on the movable jaw 12, the operator necessarily extends'his or her hands betweenthe jaws. Consequently, if the press is operated prematurely or the operator is slow in withdrawing' his hand from between the jaws, the hand or finders will lee` caught between the jaws and crushed.

By the use of the safety guard herein disclosed,the operator is moved bodily a suitable distance from the press as soon as the latter is operated so that it is impossible for the operator to have his or her handscaught between the aws, thus providing;` positive means for insuringr the safety of the operator. This safety guard comprises a horizontally disposed `bar 15, preferably arranged in front and rear of the press ata suitable height so that when said bar is moved outwardly it will hear against the chestof the operator and push the latter a suitable distance from the press so that the hands of the operator even if stretched ,forwardly the full distance will be outof reach of thel jaws. The ends of each bar 15 are secured to one of the ends of" a pair of vertically disposed arms 16 which are pivotally mounted at 17. 4

In the preferred form, this mounting consists of brackets 18 secured to the ceiling; above the press and supporting a horizontally disposed rod orpipc 19 on which are loosely `disposed T-connections 20 which receive the upper ends of arms 16.` In this manner a U-shaped member is formed, the horizontal portion of which when the press is inactive is disposed immediately in front of the table 14 and tl'ieupper ends of the vertical portions of vpress.

which are pivotally suspended from the ceiling with. thek U-shaped member aecupying substantially vertical position. y

A horizontally disposed rod or pipe 21 1s mounted l"at its ends by means of T-connections 23 tothe vertically disposed arms 16 a suitable distance from pivots 17, and loosely arranged on said rods are T-connections 24 of link members 25 which latter extend inwardly and downwardly toward the center of the The inner end of each member 25 1s xed to a T-connection 26 which is loosely arranged on a horizontally disposed rod or tube 27. `Thus the movement of rod 27 in vertical plane will cause arms 16, through angularly disposed members 25, to swing on pivots 17. ,The extent of this swinging movement is controlled Vby the location of rod 21 relative tothe respective pivots 17. To this purposeT-eonnections 23 are adjustable on garmsl so that rods 21 may be moved toward pivots 17 to increase the arc of movement of' sitions relative to tablev14. This joint preferf. ably comprises` a turn buckle or screw 29 having its .endsin oppositely threaded engagement withsections b,whereby by turning member 29 in proper direction, member 25 may be extended or shortened. A jam nut 30 serves 'tolockeach end of member 29 with therespective section 251. Connections 26 are arranged in pairs which extend in opposite directions `from member Y27 to receive the ends of members 25which Vconverge toward the 1 center of thepress. The ends of member 27 are carried by connections 31 which latter are fixed jtovertically disposed members 32 arranged on each side of the press and having i their lower endslixed to the respective sides of movable jaw 12as indicated at 33.

z The upper ends of members 32 are formed tubular andareopen to receive and form telescopic .engagement with the downwardly presented guides 34 which are secured to the yceiling andare disposedin axial vertical alignment lwithmembers 32. The ends of front bars 15 are tied-together by transversely disposed side sections 35 having a. telescopic joint 36 toprovide for the relative -i =swinging movements of bars 15. This teley cn scopic joint is formed by forming eaeh'section 35, of twof tubular members 37 and 38, respectively, one'end of a rod 39 being fixed to member. 38 and the-opposite end of which sitelydisposedend of tubular member 37.

3 When the press is operated, jaw 12 is moved upwardly, thereby raising vertically disposed side bars 32, the latter being guided in their vertical movement by guides 34. This elevates horizontally and longitudinally disposed members 27 which acts as a. toggle joint for members 25, thereby causing vertically disposed rods 16 to swing outwardly away from the press as shown in dotted lines 1n Figure 2. In doing so, bars 15 bear against the upper part of the opcrators body and move him or her bodily away from the press. The throw or outward movement of bars 15 is calculated so that when the operator is moved by said bars his outstretched hands will be a safe distance from the jaws of the press so that under no circumstances would be it possible for the operators hand to be caught between the jaws. The throw or outward movements of bars 15 can be regulated to take care of different sized operators by adjusting the rods 21 with respect to pivots 17 and correspondingly adjusting link members 25.

As the vertical movement of member 31 is fixed, being the same as the movement of jaw 12, the shifting of T-connections 23 relative to pivots 17 will control the extent of outward movement of bars 15. In this manner bars 15 are positively operated in proper time relation with the actuation of the press and the safety guard is so arranged that it does not interfere with the operation of the press or the duties of the operator.

In the form shown in Figure 3, bars 16 extend downwardly from bar 15 and have their lower ends pivot-ally mounted at 41 on the lloor of the press room. Links 42 are pivotally connected to the movable jaw 12 at 44 and to the bars 16 at 45, thereby causing bars 15 to swing outwardly with the upward movement of jaw 12. This form of construction is especially designed for use where it is not desirable or not practicable to mount the swinging bars from the ceiling.

In the modified form shown in Figure 4,

y bars 16 are actuatedbylinks 46pivotally interengaged at one of their ends with bars 16 and having their opposite or inner ends pivotally interengaged with a table 47 of a movable jaw 12l as at- 48, said pivotal points 48 being disposed to each side of the stationary jaw 11.

In the type of the press disclosed in this form, the size of table -1-7 is such that it is more convenient to mount the members connecting the movable jaws with the actuating mechanism of the swinging bars direct on to the l table of said jaw.

A guard of my improved construction is so arranged that 1t does not interfere with or .hamper the operator in tending to the press.

the guard foolproof and safe under allconditions. i

The parts are of strong construction and arel subjected to very little wear as the movements of the variousiparts are negligible,

thereby reducing the danger of the mecha,-`

nism getting out of order to minimum. rlhe telescopic side bars 35 provide guards for the sides of the press so as to prevent accidental movement of the operator or other workman too close to the press, without, however, interfering with the access to the machine.

My improved guard is so constructed that it is not necessary to remove or disconnect the guard or any of its connections in making adjustments or minor repairs on the press, thereby eliminating the danger of the guard being left disconnected by the mechanic.

While I have shown and described the preferred form of my invention, it is obvious that minor ychanges in the size, form, and construction of the various parts of my invention may be made and substituted for those herein shown and described, without departing from the spirit thereof as expressed in the appended claims.

I claim:

l. An automatic safety guard for presses comprising in combination with a movable part of a press a system of pendulum arms arranged in pairs on each side of the press and oscillatory transversely of the press, horizontally disposed bars arranged in front of each end of the press and supported by each pair of said arms, and toggle mechanism eonnected to the opposite arms of said pairs of arms and operable by a movable part of the press for causing said bars to move laterally a suitable distance from the press to prevent access to the press during the closing operation of the movable press jaw.

2. A safety guard for presses comprising in combination with a movable part of a press arms pivotally suspended at points remote from said press, a link pivotally connected to each arm and to said movable part of said press for actuating said arms in co-relation with said press, and horizontally disposed bars carried by the free ends of said arms adjacent to each end of said press and movable laterally by said arms to bodily push the operator away from the press during the closing movement of the main Aworking jaw.

3. A safety guard for embossing presses comprising in combination with a movable part of a press, oppositely spaced two pairs of arms pivotally mounted adjacent to said press, a horizontally disposed bar carried by the free ends of one pair of arms and normally disposed immediately in front of said press at a predetermined height with respect to the operator, means operable by said movable part of said press and connected to said arms for oscillating the latter, whereby said bars are actuated in an are away from said press a predetermined distance during the closing ll. A safety guard for presses `comprising in combination with a movable part of a press, `opposite two pairs of arms pivotally suspended from the ceiling of the press room, horizontally disposedbars arranged adjacent to each end of said press and fixed to said arms, said bars being movable laterally by said arms to bodily push the operator away from the press during the closing movement of the main working j aw, of said press, toggle joint mechanism connecting the respective pairs of pivoted arms, and connections between said toggle joint mechanism and a movable part of said press for actuating said arms and moving said bars to position the op erator a definite distance away from the press during the closing movement of the jaws of said press.

5. A safetyI guard for presses comprising in combination with a movable part of a p1.'ess,two opposite disposedpairs of arms pivotally suspended from the ceiling of the press room, horizontally disposed bars arranged adjacent to each end of said press and fixed to said arms, said bars being movable laterally by said arms to bodily push the operator away from the press during the closing movement ofthe main working jaw of said press, toggle joint mechanism connecting the respective pairs of pivotal arms, connections between said toggle joint mechanism and a movable part of said press for actuating said arms and moving said bars a definite distance away from the press during the closing movement of the jaws of said press, and means for adjusting the points of interengagement between said toggle joint mechanism and said bars to regulate the operative movements of said arms.

6. A safety guard for presses comprising in combination with a movable part of a press, opposed arms pivotally suspended from the ceiling of the press room, horizontally disposed bars arranged adjacent to each end of said press and fixed to said arms, said bars being movable laterally by said arms to bodily push the operator away from the press during the closing movement of the main working jaws of said press, toggle joint mechanism connecting the respective opposed arms, and connections between said toggle joint mechanism and said movable part of said press for actuating said arms and movingsaidbarstopositionthe operator a definite distance away from the press during the closing movement of the jaws of said press, and. means for guiding said toggle joint mecha nism and the operating connection therefor.

7 In a safety guard for a press having a movable part, the combination of two pairs of spaced arms, each arm being pivotally Cil mounted at one end adjacent to and independently of said press; a horizontally disposed bar disposed immediately in front of and extending the full Width of each end of said press at a predetermined height with respect to the operator; said bar having its ends secured to the free ends of the arms of one of said pairs of spaced arms; a member fixed to each side of said movable part; and a pair 1.0 of links disposed on each side of said press

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