US2263134A - Safety device for presses - Google Patents

Description

Nov. 18, 194 1. O 2,263,134

SAFETY DEVICE FOR PRESSES Filed May 18, 1940 3 Shets-Sheer, i

Nov. 18,1951. 1H5 v I 2,263,134-

' SAFETY DEVICE FOR PRESSES Filed May 18, 1940 2v Sheets-Sheet 2 Patented Nov. 18 1941.

IT STAT E S QFFIC E 2,263,134 SAFETYDEVICE FOR masses; 7 John Hoza, Belcamp,fMd; ApplicationMay 18, 1940," SrialNot 336,043

7'Claims. (or. 192-133) The present invention ,relates'to safety devices forpressessuch as unused for. pressing soles and. insoles in; the manufactureoffootwear. The invention hasfinview the prevention of injury to the-operator during pressing of the. work pieceif, during positioning'pf the sole or insole, he should leave one hand between the patterns or pressingelements; whilst with theother hand he removes the pressed sole or insole frombetween the patterns.

Accordingly, an object of the' invention is a safety device the operation of which is effected through the engagement of; a control element, for example a curved protectingstirrup; by the operators hand during the pressing of the work piece, whereby'the press isbrought to a standstill and the=desired protecting distance remains betweenthe patterns.

Another objectof. the invention is a safety device comprising a springr pressed abutment member movable to apositionbetween parts moving with the patterns to cooperate therewith and fined in which the throwing'overof the abutment .alsoeffectssimultaneously the stoppage of the machine,-for example byreason of a part moving with said abutment co-operating with a door contactrcontrollingthe electrical circuit of the driveL- Still another object is a-safety' device as above defined having means for re -setting the abut ment member afterthe latter: has been thrown into the operative (stopping) position.

Forthe better understanding of the invention reference will now be made to theaccompanying drawings, whichillustrates by way'of example one construction according to the invention.

In the drawings: I I

Figure 1 is a side View of the protecting device mounted on asole and insole press; 7 V

Figure 2 is aplan view in partial section on line A-A of Figure 1;

Figure 3 is a sideview showingthe protecting device in the freed or operative position.

Referring tothe drawings, a safetydevice according to the invention is illustrated as applied to a press comprising a guiding rod I on which during. operation of the machine a lower slide Itmoves to and fro with a lowerpattern B. An

upper pattern C isfixed in the upper part'of the press and faces towards; the "lower pattern B. The safety device; which is firmly mounted with the aid of a frame 9 on the guiding rod I, comprises a curved bow-shaped protecting stirrup 2 of which one end is extended and is inserted in a bent arm Spivotedon a bracket 4 by meansof a screw 1. The extended arm of the curved stirrup. 2-;has a longitudinal slot 5 through which passes a screw 6 serving for holding fast the stirrup. The said screw and slot connection enables the stirrup 2 to be pulled forward or pushed in and thereby adapted to the .form of thepatterns in use. The curved stirrup 2 and arm 3 secured fast to one another in this manner thus forrnwanlever rotatable about the screw 1. In

theend of thearm 3 a pin 8 is inserted which.

passes through-an openingin a housingon the frame 9 of the safety device andv cooperates with a recess 10 in a block or wedge II which is adapted to he slid forwardbetween relatively movable parts of the press to prevent complete approach of the patterns, said pin 8'servingto. lock the wedge in the retracted. position. For the initial setting of the safety .device a rod I3 is provided having a Bakelite knob l2. In order to set the pressin operation the rod 13 isipressed into the machine, whereby. the other end of this rod presses the wedge H towards the, right, that is into the housing on the frame 9. The wedge moves against the action of. a spring I 4, which latter is thereby compressed. Meanwhile the pin 8 enters the recess l0 ofthe Wedge and thelatter is thus secured.

The spring is compressed ona rodv 15 which is .screwed fast in the wedge ll so that it takes part in.the to and fro movement of the wedge. The other end of the rod. I'5 passes freely through. an opening in the housing ,on the frame 9 and bears onthe sprung plate It which forms one .part of a door contactwhich is mounted on a bent bracket 11 fast on the frame .of the safety device. I

The safety device havingbeen rendered ready for operation by pressing the knob .12, the machine can be setiinoperation- 'I'he'patterns can complete the pressing .operation,.this position of the; patterns being illustratedin Figure 1. It now the operatorplaces a work. piecebetween the patterns with his left. hand and with his right hand removes another workpiece from between the patterns, but does not withdraw his hand intime from the machine. then the lower upwardly moving pattern lifts his hand, whereby the latter comes against the curved stirrup 2 which is raised and sets the safety device inv operation as follows:

The lever formed by the stirrup 2 and slotted arm 3 swings aboutthe screw 1 whereby the pin 8 :is disengaged from the recess ll] of the wedge I l. The latteris therebyreleased so that the stronglycompressed spring M-slides it quickly towards theleft together with the rods l3 ands-I55 Thereby theprojecting end of the wedge comes between the frame '9- of the safetydeviceand the upwardly movingilowersIide lB-as shown in Figure 3 so that the patterns cannot fully close; that is, a sufiicient distance for protection remains between them (Figure 3) so that the hand of the worker is not injured. Simulstopped. The safety device can be reset to the normal position by pushing the Bakelite knob. l2 towards the machine. The wedge II is again pressed into the housing on the frame, the spring [4 compressed, and the pin 8 brought into the slot I of the wedge, whereby the latter is locked against flying out. Simultaneously the rod l again engages the sprung plate IS, the door contact is made ready for operation and the machine can again be started.

I claim:

1. In a press, such as for soles and insoles, having a pressing element slidable on a guide towards another pressing element, a frame mounted on the guide, a safety device comprising an abutment member slidably mounted with respect to the frame and slidable into a position between the frame and a part moving with the sliding pressing element to co-operate therewith and limit the approach of said sliding element to the other element, said abutment member normally being retained out of said position, and a control member so disposed in relation tothe pressing elements that the operators hand, if between said elements during their relative approach, is carried into engagement with the control member to operate the latter for moving the abutment member into said position.

2. In a press for soles and insoles, a stationary pressing element and a slidable pressing element movable toward and from the stationary element, a guide for the slidable element, a frame mounted on the guide, a safety device comprising an abutment member slidably mounted with respect to the frame and slidable into a position between the frame and a part moving with the slidable pressing element to co-operate therewith and limit the approach of said slidable element to the other element, said abutment member normally being retained out of said position, and a control member in the form of an adjustably mounted bowed stirrup embracing the entry end of the pressing elements and so disposed in relation to the pressing elements that the operators hand, if between said elements during their approach, is carried into engagement with the control member to operate the latter for moving the abutment member into said position.

3. In a press for soles and insoles, a stationary pressing element and a slidable pressing element movable toward and from the stationary element, a guide for the slidable element, a frame mounted on the guide, a housing mounted on the frame, a safety device comprising a spring urged abutment member slidably mounted in the housing and movable by its spring to a position between the frame and a part moving with the slidable pressing element to co-operate therewith and limit the approach of said slidable element to the other element, a detent normally holding said abutment member out of said position, and a control member connected with said detent and so disposed in relation to the pressing elements that the operators hand, if between said elements during their approach, is carried into engagement with the control member to operate the latter for releasing the abutment member.

4. In an electrically operated press for soles and insoles, a stationary pressing element and a slidable pressing element movable toward and from the stationary element, a guide for the slidable element, a frame mounted on the guide, a safety device comprising an abutment member slidably mounted with respect to the frame and slidable into a position between the frame and a part moving with the slidable pressing element to co-operate therewith and limit the approach of said slidable element to the other element, said abutment member normally being retracted out of said position, a switch adjacent the retracted abutment member for controlling the drive of the press, a control member engageable by the hand of an operator and operable to bring said abutment member into said position for limiting the relative approach of the pressing elements, and means moving with said abutment member to actuate the switch upon initial movement of the abutment member to stop the drive of the press.

5. In a press for soles and insoles, a stationary pressing element and a slidable pressing element movable toward and from the stationary element, a guide for the slidable element, a frame mounted on the guide, a safety device comprising an abutment member slidably mounted with respect to the frame and slidable into a position between the frame and a part moving with the slidable pressing element to co-operate therewith and limit the approach of said slidable element to the other element, said abutment member normally being retained out of said position, a control member so disposed in relation to the pressing elements that the operators hand, if between said elements during their approach, is carried into engagement with the control member to operate the latter for moving the abutment member into said position, and a hand operated rod secured to the abutment member for re-setting said abutment member in its inoperative position.

6. In a press for soles and insoles, a safety device including a slidable abutment member slidable into a position between relatively movable parts of the press to rigidly block the movement of a pressing element at a fixed point in the pressing stroke thereof in order to prevent completion of said pressing stroke and cause a gap to be left between the pressing elements independently of continuance of the drive therefor, and control means adapted to be operated by the operators hand if the latter is between the pressing elements, and in that case to slide the abutment member into the blocking position before the moving pressing element reaches the said fixed point in its pressing stroke, so that the pressing element will be blocked upon reaching that point.

'7. In a press for soles and insoles, a safety device as claimed in claim 6, and further comprising control means for cutting 01f the drive of the moving pressing element, said further control means being operated automatically immediately upon movement of the abutment member to the blocking position, the arrangement thus being such that first the drive of the pressing element is cut off and at a later point in its stroke the pressing element is rigidly blocked by the abutment member.

JOHN HOZA.

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