US2299397A - Holding device - Google Patents

Description

Oct. 20, 1942. c. KRALICEK ET AL I 2,299,397

HOLDING DEVICE Original Filed March 18, 1941 INVENTORS fiqwsmucmfi 70 By W JANDEL.

AT 10mm Patented Oct. 20, 1942 UNI TED STATE are- '1 OFFICE HOLDING DEVICE Original application March 1 8, 1941, Serial No.

Divided and this application November 14, 1941, Serial No. 419,612

3 Claims.

This application is a division of our pending application, Serial No. 383,988, filed March 18,

1941, for Automatic stage drilling machine,

Our invention relates in general to holding devices and more particularly to releasable holding devices adapted to hold objects while being worked or drilled.

An object of our invention is the provision of a releasable holding means into which the heads of the bolts or other part of the device being drilled may be readily inserted by the operator and in which when the bolt or other object is inserted therein the releasable holding means automatically clamps the bolt or other object for holding same securely therein during the drilling operation.

Another object of our invention is the provision of a releasable holding means which when the drilling operations are finished is auto matically operated for ejecting the drilled bolts or other objects therefrom,

Other objects and a fuller understanding of our invention may be had by referring to the following description and claims, taken in conjunction with the accompanying drawing, in which:

Figure 1 is a side elevational view of our releasable holding device which is adapted to hold bolts or other objects during a drilling operation;

Figure 2 is a plan View of the releasable holding means or device shown in Figure 1;

Figure 3 is a plan view of the bottom part of our releasable holding means with the top pivoted parts removed;

Figure 4 is an end view of the left-hand end of our releasable holding means as shown in Figure 1; and

Figure 5 is a longitudinal cross-sectional view of our releasable holding means or device taken along the lines 5-5 of Figure 2, with the bolt removed.

Our releasable holding means indicated generally by the reference character 2| is particularly adaptable to hold bolts or other objects while being drilled, and comprises a lower stationary jaw member 65 which may be secured to a work table and an upper pivoted jaw member 66 whichis pivoted to opposite sides of the lower stationary jaw member by means of pivot members 6? and 68. The lower jaw member 65 is provided with a replaceable jaw portion 69 to accommodate bolt heads of different sizes. The replaceable jaw portion 69 may be removably held in position by means of a screw ill, see Figure 5. The right-hand end of the pivoted jaw member 66 is urged upwardly by a plurality of springs H disposedbetween the lower stationary jaw member and the pivoted jaw member. The Springs 1'! by urging the right-hand end of the pivoted jaw member 66 upwardly causes the left hand engaging end to engage the top of the head of a bolt shown in dash-dot lines in Figures 1, 2 and 4 and hold the same firmly against the lower stationary jaw member 55. The releasable holding means 2! may be securely held against a rotary work table, such as shown in our pending application, Serial No. 383,988, filed March 18, 1941, for Automatic stage drilling machine, by means of a threaded bolt engaging the threaded opening 14 in the lower portion of the stationary jaw member 65. At the end of the drilling operation the bolts are released by depressing the extreme right-hand end release portion 8| of the pivoted jaw member 66 and the springs 'i'l until the hook latch member 12 swings to the left as shown in Figure 5 under the urge of a spring 13 and engages the top edge of the pivoted jaw member 66, which releases the grip upon the bolt head for ejecting same. The depressing of the springs H to release the bolt may be by automatic means. The bolt is ejected by means of a plunger 15 which is urged to the left by means of a spring 16. That is to say, just as soon as the pivoted jaw member (i6 is released, the plunger 15 under the urge of the spring 76 ejects the bolts from our releasable holding means. Just as soon as a finished bolt is ejected, the operator stands ready to insert a new bolt into our releasable holding means and upon the insertion of the new bolt into our releasable holding means the plunger I5 is pushed to the right as shown in Figure 5 until the righthand end 18 thereof engages an adjustable screw 11 which is carried by the hook latch member 12, whereupon the hook latch member 12 is pushed to the right until the hooking engagement is released from the top of the pivoted jaw member 66 after which the left-hand end of the pivoted jaw member 66 immediately swings downwardly and constrains the head of the bolt against the lower stationary jaw member 65. The Figure 1 shows the pivoted jaw member in the unlatch'ed position where the left-hand end of the pivoted jaw member 66 is constraining the head of the bolt against the lower stationary jaw member 65. The adjustable screw 11 is provided to accommodate the proper unlatching of the hook latch member 12 from the top surface of the piv-' oted jaw member 66. As illustrated in Figure 5,

the plunger 1571s arranged to slide back and forth to fit in guide bearings 19 which are spaced apart to give stability to the movement of the plunger 15. The guide bearings 19 may be secured to the lower stationary jaw member 65 by means of nuts 80. The operation of our releasable holding means 2| is such that it is completely automatic and functions to hold the bolts or other objects therein just as soon as the plunger 15 is pushed to the right in its rearwardmost position and functions to release the bolt which is held therein during the drilling operation just as soon as the extreme right-hand end 8| is depressed.

Although we have described our invention with a certain degree of particularity, it is understood that the present disclosure has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and the scope of the invention as hereinafter claimed.

We claim as our invention:

1. A releasable holding means for holding an object comprising, in combination, two pivotally connected jaw members for holding the object, latch means for holding the jaw members apart, trip means engageable by the object upon the insertion thereof between the jaw members for releasing the latch means, and spring means for urging the jaw members together for holding the object therebetween 2. A releasable holding means for holding an object comprising, in combination, two pivotally connected jaw members for holding the object, latch means for holding the jaw members apart, trip means engageable by the object upon the insertion thereof between the jaw members for releasing the latch means, and spring means for urging the jaw members together for holding the object therebetween, one of said jaw members having a portion for actuation to oppose the spring means and separate the jaw members, whereupon the iatch means hold the jaw members apart, said trip means acting to eject the object upon the separation of the jaw members.

3. A releasable holding means for holding an object comprising, in combination, two pivotally connected jaw members for holding the object, latch means for holding the jaw members apart, trip means engageable by the object upon the insertion thereof between the jaw members for releasing the latch means, and spring means for urging the jaw members together for holding the object therebetween, one of said jaw members having a portion for actuation to oppose the spring means and separate the jaw members, whereupon the latch means hold the jaw members apart, said trip means acting to eject the object upon the separation of the jaw members, one of said jaw members having a replaceable portion to accommodate objects of different sizes.

CHARLES KRALICEK. FRANK J. ANDEL.

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