US2013210A - Work holder for pressing machines - Google Patents

Description

Sept. 3, 1935. F. A. HEIDENFELDER WORK HOLDER FOR PRESSING MACHINE Filed July 12, 1950 fiecixljfsialenfezdek- .fere with the operator making the Patented Sept. 3, 1935 PATENT OFFICE WORK HOLDER'FOR ranssmo MACHINES Fred A; Heidenfeider, Chicago, 111., assignor to The American Laundry Machinery Company Cincinnati, Ohio, a corporation of Ohio Applicationluly 12, 1930, Serial No. 467,491

9 Claims.

My invention relates to an attachment for pressing machines and, particularly, to an attachment commonly known asa tail clamp which is adapted to hold the tail of a shirt in such position on the buck of a press that it may be proper- 7 1y pressedwhile, at the same time, relieve the operator of the necessity of the use of the hands forholding the work in proper position thereon until the movable pressing member reaches such position relative to the pressing buck as to pre ventany movement or distortion of the work.

Heretofore, there have been numerous types of tail clamps some of which embodied simply a flexible band secured on one side of the pressing buck and adapted tobe drawn over the buck and any work thereon and secured onthe other side ofthe buck to hold thework in position. Other types have embodied a swinging carrier frame adapted to be swung to: such position" as to place the clamping band crosswise of the buck and the Work thereon or to such position as" to remove the clamping-band from the buck and work,

:qMy invention contemplatesthe provision of a tailclarnp embodying a flexible band mounted on a frame together with power operated mechanism and controlmeans for swinging the carrier frame and clamping band to 'such position that the clamping band will .bedisposed cross-wise of the buck and over the'work thereon, the same mechanism being adapted to move the carrier frame downwardlyas a unit whereby the clampingband will be moved downwardly on the WOIk'Wlth a direct vertical andno longitudinal movement of the band, and for moving the carrier'frame' and clamping band vertically upwardly and then swinging the frame and band to such position relative to the pressing buckthat it will notinterproper lay of work on thepressing buck. .wVarious other objects and advantageousfeatures of. my invention may be seen inthe following description and one embodiment thereof may be seen in the accompanying drawing wherein similar characters of reference designate corresponding parts, and wherein: l

i Fig. 1 is an elevation, partly in section; showing a tail clamp constructed in accordance with. my invention and the operating means :therefor, the

tail clamp being in operative position relative to the pressingbuck; and Fig. 2 is an elevation of r the tail clamp in operating mechanism shown in Fig. 1 showing the clamp out of operative relationwith the pressing buck.

yReferring to the-drawing and particularly Fig. 1 thereof, 1 have diagrammatically shown part of a pressing machine which may be of any wellknown type and which consists of the usual pressing table l and pressing buck 2, all being suitably supported on a frame 3.

In accordance with my-inventin, I have provided a tail clamping device consisting of a flexible band 4 that is adapted to extend cross-wise of the buck 2 and hold any work tobe. pressed thereon, the flexible band 4 being supported by a carrier frame 5 disposed beneath the buck 2 when the clamping band 4 is in operative relation with the buck. Such clamping band is attached to the carrier frame 5 by means of suitable securing means 6.' v

The carrier frame 5 is mounted on the uppermostendof a shaft 1 rotatably and reciprocably mounted in a bracket 8 that may be secured to the frame of the pressing machine in any wellkno-wn manner and connected to a piston rod 1', the bracket 8 embodying an extension 9 which supports a cylinder NJ having-a piston ll therein and mounted on the piston rod 1, the piston ll being operated by air pressure from a main line I2 through auxiliary lines 13 and M that respectively lead to the cylinder Ill above and below the piston l. I Flow of air pressure to the cylinder I0 is controlled by avalve l5. l

' As shown in the drawing, the bracket 8 embodies a portion I6 having a cam groove I I therein that extends vertically for a portion of; its 30, length and then circumferentially around a part of the, portion l6 of the bracket. A pin l8 having aroller l9 thereon extends outwardly from the shaft 1, and is adapted to follow the cam groove H and rotate the shaft a given distance either inone direction or the other during the reciprocation of the shaft 1 by following the circumferentially disposed part of the groove. This rotation will result in swinging of the carrier frame .5 and clamping band 4 into or out of op- 40 erative relation with the buck 2.

In the operation of this device, it being assumed that the carrier frame and clamping band are in the position shown in Fig. 1 in which the clamping bandA is in cooperative relation withrthe pressing buck 2, the valve I5 is operated in such manner that fluid pressure flows from the pipe l2, through the pipe M and to the under surface of the pistonflll to force the piston H, piston rod 'IQand shaft upwardly. The valve 65 is so arranged that the fluid pressure above the piston II will escape through the pipe l3 and valve I 5 to the atmosphere. Upward movement of the piston I l and connected parts, including the shaft 1, will move the carrier frame 5 and clamping 555 band 4 vertically upwardly off the buck and the work thereon so long as the pin and roller l8 and I9 follow the vertically extending portion of the cam groove ll. This movement serves to release the work on the buck without any distortion thereof due to longitudinal movement of the clamping band 4. Then, when the pin and roller l8 and ifi strike the circumferentially disposed portion of the cam groove H, the shaft I will be rotated which will swing the carrier frame 5 that is ri idly attached thereto tothe position in Fig. 2 wherein the carrier frame and clamp ing band are disposed at the rear of the buck and extend in the same general longitudinal direction. I I

The pressed work having been taken from the buck and another lay made thereon, the valve.

I5 is operated to permit fluid under pressure to flow through the pipe l2, pipe i3 and to the upper surface of the piston II to move the piston downwardly. As in the previously described movement of the piston, the valve I5 is so arranged that fluid under pressure against the un der side of the piston will then escape through the pipe it and valve E5 to the atmosphere. At the beginning of the downward movement of the piston H and its connected parts hereinbefore described, the pin and roller l8 and I9 traveling in the circumferentially directed portion of the cam groove i! will first swing the carrier frame 5 and clamping band 4 to the position shown in Fig. 1 wherein the carrier frame is below the buck and the clamping band above and cross-wise thereof. Continued downward movement of the piston it will bring thepin and roller [8 and IS into the vertically extending position of the cam groove H whereby the clamping band 4. will be moved directly vertically downwardly onto the buck without anylongitudinal movement thereof, the parts being so arranged that the clamping hand will have assumed its position cross-wise of the buck before the downward vertical movement begins and such downward movement will continue until the parts are in the position. shown in Fig. 1 wherein the work will be securely held on the buck by the clamping band 4.

Referring to the drawing and the preceding description, it will be seen that I have provided a device of the class described embodying numer- 0115 novel and advantageous features. For instance, I have provided a clamping band and carrier frame together with a power operated mechanism therefor of such nature that the clamping band may be swung cross-wise the buck by the simple operation of a control element which may be in proximity with the other controls of the pressing machine and will be moved directly vertically downwardly without any longitudinal movement of the clamping band. This is'highly important in that it will prevent any distortion of the work by the clamping band moving into engagement therewith.

Another advantageous feature resides in the fact that the carrier frame and clamping band may be swung either to a position wherein the clamping band will be crosswise of the buck or to such position as to extend in the same general longitudinal direction as the buck and be disposed to one side thereof and will move automaticallydownwardly onto the work or directly upwardly off of the work depending on the direction of operation of the valve. Various other advantageous features will be readily apparent.

What I claim is:

1. In combination with a pressing machine including a support and a buck, a carrier frame, a clamping band mounted on said frame, and power operated means for swinging said clamping band over said buck and said carrier frame under said buck and moving said clamping band into engagement with said buck or with work thereon, said power operated-means embodying a cylinder and piston construction, a vertically extending reciprocable shaft on which said clamping band is mounted, a stationary cam groove, and a pin and roller on said shaft and adapted to travel in said cam groove to swing said shaft and move said clamping band into and out of operative position relative to said buck.

2. A work clamping unit for a pressing machine having a frame and a work supporting buck, said unit comprising a clamping band for holding work on said buck, a support for said band carried by said pressing machine frame and mounted on a vertical pivot, motor means for swinging said band laterally into and out of working alignment withsaid buck and for moving said band vertically into and out of clamping engagement with said buck, and means for controlling the operation of the said motor means.

3. A work clamping unit for a pressing machine having a frame and a work supporting buck, said unit comprising a clamping band for holding work on said buck, a support for said band carried by said pressing machine frame and mounted on a vertical pivot disposed at the rear of said buck, motor means for swinging said band laterally into and out of working alignment with said buck and for moving said band vertically into and out of clamping engagement with said buck, and means for controlling the operation of said motor means.

4. A work clamping unit for a pressing machine having a frame and a work supporting buck, said unit comprising a clamping band for holding work on said buck, a support for said band carried by said pressing machine frame and mounted on a vertical pivot disposed at the rear of said buck, motor means for swinging said band laterally from an inoperative position substantially parallel with the longitudinal axis of said buck into and out of working alignment with said buck and for moving said band in a direct vertical line into and out of clamping engagement with said buck, and means for controlling the operation of said motor means.

5. In combination with a pressing machine including a supporting frame and a buck, a clamping band for holding work on said buck, a pivotally mounted support for said band, and power operated means for swinging said clamping band into and out of working alignment with said buck and into and out of clamping engagement therewith, said power operated means embodying a cylinder and piston construction, a vertically extending reciprocable shaft on which said clamping band is mounted, a stationary cam groove in said cylinder having a portion arranged at an acute angle to the axis of the shaft and another portion parallel to the shaft, and a pin and roller on said shaft and adapted to travel in said cam groove to swing said shaft and move said clamping band into and out of working alignment with said buck and into and out of clamping engagement therewith.

6. A pressing machine including in combination elongated upper and lower pressing elements having relative movement one toward and from the other; a work grip cooperating with the low- .er pressing element; means supporting the work grip for movement toward and away from one end of the lower pressing element, in the direction of the length of the lower pressing element, 1

work grip in a reverse manner out of operative position.

7. In a pressing machine, a work supporting member, a work grip for cooperation with said work supporting member, a bracket, a carriage for said work grip mounted in said bracket for pivotal and slidable movement, the pivotal movement of said carriage effecting movement of said work grip back and forth between an outof-the-way position and a position overlying said work supporting member and the slidable movement of said carriage effecting'movement of said work grip back and forth between said overlying position'and a position in clamping engagement with said work supporting member, and means for actuating said carriage to effect such pivotal and slidable movement of the work grip carried thereby. j a

8. In a pressing machine, a work supporting member, a work grip for cooperation with said work supporting member, a bracket,a carriage for said work grip mounted in said bracket for pivota1 and slidable movement, the pivotal movement of said carriage efiecting movement of said work grip back and forth between an out-of-theway position and a position overlying said work supporting member and the slidable movement of said carriage effecting movement of said work grip back and forth between said overlying position and a position in clamping engagement with said work supporting member, means for actuating said carriage to effect such pivotal and slidable movement of the work grip carried thereby, and means for limiting the pivotal movement of said carriage when said work grip has reached said overlying position after movement from said outof-the-way position.

9. Ina pressing machine, a work supporting member, a work grip for cooperation with said work supporting member, means for supporting the work grip for movement over the end of said Work supporting member into andout of position over the margin of the work supporting face of said member and for movement vertically toward and from said member, and means for actuating the work grip to successively move the same from said margin of said work supporting member and then move the work grip rectilinearly toward the work supporting member to grip work thereon and for moving said work grip out of operative position in reverse order.

' FRED A. HEIDENFELDER.

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