US2629318A

US2629318A - Inclinable press

Info

Publication number: US2629318A
Authority: US
Inventors: Alfred W Schultz
Original assignee: Clearing Machine Corp
Current assignee: Clearing Machine Corp
Priority date: 1946-10-05
Filing date: 1946-10-05
Publication date: 1953-02-24
Anticipated expiration: 1970-02-24

Description

rm w u 1 w m h, 2 w w 5 2 a d 4 r Z1 .QM/ Z HE m P Wm Feb. 24, 1953 Filed Oct 5, 1946 A. w. SCHULTZ INCLINABLE PRESS Feb. 24, 1953' 4 Sheets-Sheet 2 F11 Oct. 5. 1946 W. M P w vM g Feb 24, 1953 Flled Oct 5 1946 Patented Feb. 24, 1953 INCLINABLE PRESS- Alfred W. Schultz, Chicago, Ill., assignor to Clearing Machine Corporation, Chicago, 111., a corporation of Illinois Application October 5, 1946, Serial No. 701,526

6 Claims.

This invention relates in general to presses and particularly to inclinable presses, and has among its objects the provision of novel mechanism whereby the treadle which operates the press will remain in its normal position when the main frame ofthe press is tilted or moved to an inclined position.

Inclinable presses of the c-frame or open gap type customarily have a treadle at the lower end thereof which is connected to an operating head whereby the press may be operated upon pressing the treadle. Difiiculties have been encountered in the past in this type of machine when the frame was moved to an inclined position, because in moving the frame, the distance between the point of connection to the operating head and the treadle would be increased or decreased and as a result, would move the treadle out of its normal position. An attempt has been made to overcome this disadvantage by forming the elongated connecting rod of two pieces and splicing them together. This arrangement, however, has proven to be undesirable in actual practice and I have provided a novel linkage mechanism connecting the treadle with the operating head, which mechanism is so arranged that when the main frame is tilted, it will permit the treadle to remain in its normal position. i

It is, therefore, an important object of this invention to provide a mechanism in an inclinable press to permit tilting or inclining of the frame without materially changing the position of the operating treadle.

Another object of the invention is to provide in an inclinable press a linkage connection between the operating treadle and the head of the press whereby the treadle will remain in its normal position when the frame is inclined.

A further object of the invention isto provide in an inclinable press a rigid rod connected at one end to the operating head and at its other end to a bell crank, which in turn is so connected to the operating treadle as to permit inclining of the frame without changing the position of the treadle.

Still another and more specific object of the invention is to provide in an inclinable press a bell crank connected to the operating treadle, a second bell crank connected to a rod on the operating head and a link connecting the two bell cranks, where the bell cranks are so located as to permit the frame to be inclined without changing theuposition of the treadle.

Other objects and advantagesofthe invention will become apparent upon a reading offthe following description taken in connection with the accompanying drawings in which:

Fig. l is a side elevational view of the inclinable press with one side of the supporting base broken away to show more clearly the linkage mechamsm;

Fig 2 is a front elevational view;

Fig. 3 is avertical fragmentary section taken substantially along the plane of line 3-3 of Fig. l; i

Fig. 4 is a vertical section taken substantially along the plane of line 4-4 of Fig. 1;

Fig. 5 is a fragmentary side elevational view of the press showing the position of the linkage mechanism when the main frame is tilted;

Fig. 6 is a vertical section through the press at the lower part thereof, showing the inclining means; and

Fig. 7 is an enlarged diagrammatic illustration indicating the basis for properly positioning the bell cranks to obtain the desired result.

Referring now more particularly to the drawings, the press is provided with a supporting base generally indicated by the numeral l having spaced

side members

2 and 3. The main frame 4' of the press is located between the side members of the base and is pivotally mounted thereon so that it may be free to rotate about its pivotal point and be moved to an inclined position. The lower part of the open gap frame 4 is provided with spaced sides 5 and 6, the side 5 being provided with a pivot pin 1 journaled in a bearing 8 and passing through the side 2 of the supporting base, whereby it may be secured in place by the nuts 9 and Ill. At the opposite side, the member 6 is similarly pivoted to the side 3 of the base by means of the pivot pin ll having a center Ila 'journaled in the bearing l2 and secured in place by the nuts l3 and I l. The frame is thus mounted for a tilting or inclining movement about the pivot pins 1 and II.

"The supporting base has a plurality of holes l5 at the rear thereof, and these holes are located in an arcuate path about the pivot pins 1 and l l as a center so that a locking pin l6 may be inserted to hold the main frame in any one of a pluralit of tilted or adjusted positions.

The lower partof the main frame is provided with the usual bed plate I! and the removable bolster I8. While the inventionmay be applied to any type of machine or press where it is desirable to move or tilt a portion thereof without changing the normal position of the operating treadle, the type of press disclosed hereinis provided with an operating head adapted to drive I treadle.

' the pivotal point of the main frame.

a plunger. The operating treadle may be moved to engage or disengage a clutch mechanism in order to actuate the operating head. This part of the press, however, forms no part of the present invention, and therefore no detailed explanation of these parts need be made.

A rigid rod H) has a bifurcated upper end 20 which maybe suitably connected to the operating head in the usual manner. The operating head is actuated by longitudinal reciprocation of the rod l9 through a suitable connection with an cp crating treadle 2| which is preferably located at the bottom of the press. The treadle 2| has a foot portion 22 at the forward .end thereof, and

' this foot portion is pivotally mounted at its rear end on a pivot pin 23 received within a bearing 24 mounted on the side 3 of the supportin base.

A pivot pin 25 passes through the treadle 2| at some suitable point between the ends thereof (see Fig. l). The pin 25 engages the lower bifurcated'end '26 of a link construction 21. The upper end 28 of the link construction is pivotally secured by means of the pin 29 to one arm of a bell crank 3i). This bell crank 30 is pivoted at 3| to the side 3 of the supporting base. The rod 21 extends upwardly through a bracket 32 also mounted on the base. The rod '27 also is provided with a collar 33 spaced upwardly from the bracket 32, and a coiled compression spring 34 surrounds the link and bears at its ends against the bracket 32 and the collar .33, so that when the treadle is depressed to actuate the operating head; the treadle will be moved downwardly against the tension of the spring 34 which urges the treadle back to its normal inoperative position when pressure thereon is released.

The other arm of the bell crank 30 has a pivotal point 30a which ispivotally secured to one end 35 of a .rearwardly extending link 36 which has a rear bifurcated end 3'! pivotally secured to one arm of a second bell crank 38 at the piv-.- otal point 3841. This latter bell crank 38 is pivoted at 39 to the side 6 of the-main frame, the other arm of the bell crank 38 being secured to the lower end 4!) of the rod l9 by means of a pivot pin.

In the normal-upright position of the main frame as shown in Fig. 1, the treadle may be ,de-

pressed to actuate the operating head. This movement of the treadle will rotate the bell crank 30 in a counter-clockwise direction, and the bell crank 38in a clockwise direction, thus causing a downward longitudinal movement of the rod Hi.

When the main frame .4 is tilted it may assume any one of a number of positions, depending upon which of the holes I receives the locking pin 16. The frame is shown in one of its inclined positions in Fig. 5, and indicates clearly the man-.- ner of operation of the linkage mechanism be! tween the treadle 2i and the rod 19 whereby the treadle is permitted to retain its normal position even though the frame has been inclined and. the head has been movedaway from the.

It may beobserved that the bell crank 30 is mounted on the supporting base adjacent The bell crank .38 is mounted on the main frame .at a much greater distance than the pivotal point thereof so that the pivotal point 39 of the bell crank 38 will be moved a considerable di$tance 1 in an arcuate path whenever the frame is inclined. The pivotal point .3 i of the bell crank will not'move since it is mounted on thesupporting base. When the frame'is moved to its inclined position'as shown Fig. 5, thebell crank 30 willbe retained in substantially its original position, the greater movement taking place in the bell crank 38 which not only moves bodily but also rotates slightly in a clockwise direction. It will thus be seen that the linkage mechanism between the treadle and the operating head, which includes the two

bell cranks

30 and 38, is .so constructed and'arranged as to permit the treadle to remain substantially in its normal position when the frame of the press is inclined;

This will be true in whatever position the frame may be placed between the two permissible extremes. Any suitable adjusting means can be provided for the treadle if suflicient movement thereof has taken place when the inclined position of the frame is between the extreme inclined and upright positions, however the error. is so slight in this arrangement as to make such adjustment unnecessary for the most part. This will become evident upon viewing Fig. 7 to which reference will now be made.

:In Fig. 7 the full line position of the bell crank 38"indicates the normal inoperative position thereof when the .main frame 4 of the press is in its upright position. The dotted line indicates the position which the same bell crank assumes when the treadle is depressed. When the frame is inclined to its full tilted position, the inoperative position of the bell crank 38 is indicated by the lower dot-dash line and the lower dotted line position thereof is that which is assumed when the treadle is depressed. The are indicated at A is that through which the point 3 8a travels when the frame 4 is moved from its upright to its fully inclined position.

It will be evident that fora perfect condition to exist where no movement of the treadle takes Place upon inclining the'press, the point 30a of the bell crank 30 should be coincident With the center ,Ija'about which the frame pivots. For physical reasons, of course, this ideal situation cannot exist because of the presence of the shaft I] and the hub surrounding it. It then remains to so position this point 30a as to result in as little error as possible in movement of the treadle when the frame is inclined. It should, therefore, be located'as close as possible to the point I la so that in the operative position of the treadle, which rotates. the bell crank 30 in a counterclockwise direction, the point 30a will not touch the hub.

In the upright position of the frame, the point 30a could be located on a line between the center Ila. and the inoperative position of the point 38a. This, however, would result in a fairly large error, or movement o f'the treadle, when the frame is moved to its fully inclined position. On the other hand, if the point 39a were to belocated on a line between the center Ha and the inoperative fully inclined position of the point 38a, the error would be equally as large when the frame is upright. Thus, to minimize this error for all positions of the frame it has been determined that the most -sati-sfactory location of'the point 36a is on a line which bisects the angle or arc between the upright and fully inclined positions of the point 38a from the center I la. This line is in B are-similar and-corresponding paths of move-.-

ment of the point 38a when the bell crank is in its operative position.

The distance between the arcs A and B or A and B along the bisecting line C represents the maximum error or treadle movement, which will occur when the frame has been tilted half way to its fully inclined position. From these arcs it will be evident that there will be no change of position of the treadle as between the fully upright and fully inclined positions of the frame. By so positioning the point a of the bell crank 30 as above described, the small error in the treadle position occurrin at the mid-position of the frame can easily be adjusted by suitable means on the treadle if so desired.

The main frame is provided, at the lower part thereof, with two strengthening webs 4| and 42, and with a horizontal web 43 which has a lug 44 extending downwardly therefrom and adapted to support any suitable inclining means 45 so that as the frame is tilted, it will be supported in such movement by the inclining means. This means may be any conventional mechanism customarily used in connection with inclinable presses and therefore need not be described in detail.

From the foregoing description it will be clear that I have provided a novel linkage mechanism for connecting the treadle of an inclinable press with the operating head thereof whereby the treadle is permitted to retain its normal position when the frame of the press is inclined. The linkage mechanism is so arranged that this positioning of the treadle is done automatically, thus overcoming the difliculties generally encountered in the past with devices of this character. It will be evident that changes may be made in the form, construction and arrangement of parts from that disclosed herein without, however, departing from the spirit of the invention or sacrificing any of the attendant adbase and a main frame pivotally mounted therei on for movement between two extreme positions from an upright position to an inclined position,

operating means on the frame for operating the press, a treadle to actuate said operating means and having a normally inoperative position, a rigid rod connected at one end to said operating means, a bell crank lever mounted on said frame and having one arm thereof connected to the other end of said rod, asecond bell crank lever mounted on said base adjacent the pivotal point of said frame and having one arm thereof connected to said treadle, and a link connecting the other arms of said bell crank levers whereby said l base and a main frame pivotally mounted thereon on a fixed axis for movement from an upright to an inclined position, said upright and inclined positions being the two extreme positions of said frame, operating means for the press, a treadle to actuate said operating means having a normal inoperative position, a bell crank having one arm thereof connected to said operating means, a second bell crank having one arm thereof connected to said treadle, and a link connecting the other arms of each of said bell cranks, the point of connection of said link with said second bell crank being located on a line from the pivotal axis of said frame which bisects the are produced by the point of connection of said link with the first bell crank in moving between the two extreme positions of the inclinable frame.

4. In an inclinable press having a supporting base and a main frame pivotally mounted thereon on a fixed axis for movement from an upright to an inclined position, said upright and inclined positions being the two extreme positions of said frame, operating means for the press, a treadle to actuate said operating means having a normal inoperative position, a bell crank having one arm thereof connected to said operating means, a second bell crank having one arm thereof connected to said treadle, and a link connecting the other arms of each of said bell cranks, the point of connection of said link with said second bell crank being located at a point within the area bounded by the are produced by the point of connection of said link with the first bell crank in moving between the two extreme positions of the inclinable frame and the lines extending from the pivotal axis of said frame to the point of connection of said link with the first bell crank in the respective extreme positions of said frame.

5. In an inclinable press having a supporting base and a main frame pivotally mounted thereon on a fixed axis for movement from an upright to an inclined position, said upright and inclined positions being the two extreme positions of said frame, operating means for the press, a treadle other end of said rod, a second bell crank lever mounted on said base and having one arm thereof connected to said treadle, and a link connect- .second bell crank pivotally mounted on said base ing the other arms of said bell crank levers whereby said treadle will be positioned in its normal inoperative position when said frame is moved to its fully inclined position, and means to hold said frame in an inclined position.

2. In an inclinable press having a supporting base and a main frame pivotally mounted thereon for movement between two extreme positions from an upright position to an inclined position,

means to hold the frame in an inclined position,

operating means on the frame for operating the press, a treadle to actuate said operating means and having a normally inoperative position, a

rigid rod connected at one end to said operating means on the frame, a bell crank lever mounted on said frameadjacent said frame holding means and having one arm thereof connected to the to actuate said operating means having 2. nor- .mal inoperative position, a bell crank pivotally and having one arm thereof connected to said treadle, and a link connecting the other arms of each of said bell cranks, the point of connection of said link with said second bell crank being located on a line from the pivotal axis of said frame which bisects the are produced by the point of connection of said link with the first bell crank in moving between the two ex treme positions of the inclinable frame.

6. In an inclinable press having a supporting base and a main frame pivotally mounted thereon on a fixed axis for movement from an upright to an inclined position, said upright and inclined positions being the two extreme positions of said frame, operating means for the press, a treadle to actuate said operating means having a normal inoperative position, a bell crank pivotally mounted on said frame and having one arm thereof connected to said operating means, a second bell crank pivotally mounted on said base and having one arm thereof connected to said treadle, and a link connecting the other arms of each of said bell cranks, the point of connection of said link with said second bell crank being located at a point within the area bounded by the are produced by the point of connection of said link With the first bell crank in moving between the two extreme positions of the inolinable frame and the lines extending from the pivotal axis of said frame to the point of connection of said link With the first bell crank in the. respective extreme positions of said frame.

ALFRED W. SCHULTZ.

8 REFERENCES CITED The following references are of record in the file of this patent:

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