US2868569A

US2868569A - Guard for punch press or the like

Info

Publication number: US2868569A
Authority: US
Inventors: David W Madden
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-06-29
Filing date: 1955-06-29
Publication date: 1959-01-13
Anticipated expiration: 1976-01-13

Description

Jan. 13, 1959 w, MADDEN 2,868,569

GUARD FOR PUNCH PRESS OR THE LIKE Filed June 29, 1955 2 Sheets-Sheet 1 [I 1"" Mb 12-. 21 i ,l l l p l i m,-

Jan. 13, 1959 D. w. MADDEN 2,8

GUARD FOR PUNCH PRESS OR THE LIKE Filed June 29, 1955 2 sheets-sheet 2 d77'or/vzega 2,868,569 GUARD FOR PUNCH PRESS OR THE LIKE David W. Madden, Oriole Park, 11!.

Application June 29, 1955, Serial No. 518,876

1 Claim. (Cl. 28754.1)

This invention relates generally to a safety guard for a punch press or the like, and more particularly to a guard which may readily be adjusted according to the direction of feed of material to the press.

One of the principal objects of the invention is to provide an improved guard for a punch press or the like, said guard being characterized by screens formed of rod-like elements spaced throughout the length of a support rail, and arranged to be readily adjusted in position with respect to such support rail according to the direction of feed movement of stock to the press.

Other objects and important features of the invention will be apparent from a study of the specification following taken with the drawings which together show a preferred embodiment of the invention and what is now considered to be the best mode of practicing the princiv ples thereof. Other embodiments may be suggested to those having the benefit of the teachings herein, and it is therefore intended that the scope of the invention not be limited by the precise embodiment herein shown, such other embodiments being intended to be reserved especial 1y as they fall within the scope of the subjoined claim.

In the drawings:

Fig. 1 is a perspective view of a portion of a punch press having incorporated therewith an improved safety guard according to the present invention;

Fig. 2 is a side elevation view of one of the elements making up .a screen for the guard shown in Fig. 1, and

' showing its mode of attachment to a support rail;

Fig. 3 is a plan view thereof;

Fig. 4 is a perspective view of a locking clip for the element shown in Fig. 2; and

Fig. 5 is a perspective view of another embodiment of the invention showing a viewing shield substituted for certain of the elements seen in Fig. 2, whereby the action of the punch and die may be readily viewed.

Referring now to Fig. l of the drawings, there is'shown a punch press indicated generally by the reference numeral and having a bed 11 mounted upon legs, not shown. The press 10 includes a frame 12 extending upward from the bed 11 and providing a support for a ram 13 arranged to move in a guide 14 which may be adjusted in its position by movement on spaced rails 16 upon which it is mounted, and which may be adjusted with respect to the frame 12.

The ram 13 has mounted at the lower end thereof a punch, not shown, which cooperates with a die holder 17 and a die 18 to operate upon a strip of punching stock nited atent 19. The precise form of the press 10 forms no part 1 of the present invention and is merely by way of environment to explain the improved guard according to the present invention.

The punch of the ram 13 and the die 18 are arranged to be wholly enclosed within a safety guard according to the present invention and referred to generally by the reference numeral 20. Such a guard includes a pair of

screens

21 and 22 mounted on each side of the ram guide 14 and spaced from each other in substantially Patented Jan. 13, 1959 ice and between the spaced

screens

21 and 22 to form a multi-sided enclosure providing a guard for the punch and die.

All of the aforesaid screens are mounted on a bracket arm 24 extending from a support block 26 held to the frame 12 by socket head screws 27. The extreme ends of the bracket arms are provided with an eye clamp 28 having a pair of

clamping limbs

29,29. A pair of support rails 31 are held in a similar eye clamp 32 having clamping limbs 33, the rails 31 being held in position relative to the bracket arms 24 by means of a clamping screw 34.

The

rails

31, 31 extend in the direction shown in Figs. 1 and 5 in spaced relationship on opposite sides of the ram 14 and the die 18 and afford a support for a rail 36 of the front screen 23. Rail 36 is provided at each end with an eye clamp 37 cooperating with a

similar eye clamp

38, 38 mounted on the forward end of the

support rails

31, 31, the two

clamps

37 and 38 clamping their

respective rails

31 and 36 by means of a clamping screw 39 similar to the clamping screw 34.

Each of the

rails

31, 31 and 36 is provided with equally spaced diametrically extending

bores

41, 41. As seen in Figs. 2, 3 and 4 a rod-like element 42 passes through each bore 41, and as seen particularly in Figs. 1 and 5 such closely spaced elements 42 form the

screens

21, 22 and 23.

Each of the rod-like elements 42 has a sliding fit Within the bore 41 and each is maintained in proper position by means of a spring clip 43 having spaced

resilient limbs

44 and 46. Limb 44 has a flanged opening 47 therein and limb 46 has a similar flanged opening 48 therein. The spring clip 43 is essentially W-shaped, and has a central bight 49 but closely spaced from the

rail

31 or 36 as the case may be. The two

flanking limbs portions

44 and 46 provide a means for locking the rod-like element 42 in position.

As seen in Fig. 2 the bore 41 and the

flanged openings

47 and 48 can be brought into register by moving the two

limbs

44 and 46 together, at such time relieving any friction against the rod-like element 42 at the

openings

47, 48 and the bore 41. Upon release of the two elements to the full line position shown, the element 42 will be held frictionally by the clip 43, and arm 44 thereof will be supported together with element 42 on the

rail

31 or 36.

As seen in Fig. 5, the rail 36 may instead form a means of support for a viewing window 51 made of suitable nonshattering material such as Lucite. The window 51 is connected to the rail 36 by spring clip members 43, and these spring clip members cooperate with a generally inverted U-shaped hanger 52 connected to a hinge mem ber 53, each disposed at the upper end of the window 51 as seen in Fig. 5.

Referring back to Fig. 1, the rod-like elements 42 of the screen 23 may be lifted in the manner shown to accommodate the passage thereunder of the strip of stock 19. Alternately, the Window 51 may be placed in position instead of certain of the elements 42 as seen in Fig. 5 and such a window may be raised and lowered as desired to permit the passage of the blank stock 19.

Alternately, the elements of the

screens

21 and 22 may be lifted to accommodate the passage of blank stock fed from side to side of the press 10.

Each of the screens shown in Figs. 1 and 5 may be readily adjusted according to the dimensions of the die and according to the direction of feed movement of blank stock 19 through the press 10. Each of the elements 42 may be raised or lowered as desired and as described above. Each of the screens may be tilted inward or outward according to the dimensions of the punch or die, and as seen in Fig. 1 the forward screen 23 is tilted towards the die 18.

While the invention has been described in terms of a preferred embodiment thereof its scope is intended to be limited only by the claim here appended.

I claim as my invention:

In a connecting joint for a pair of intersecting rod-like elements, one of said elements having a substantially diametral bore therein for receiving the other element therein in intersecting relationship, means for holding the said other element against sliding in said bore yet enabling same readily to be adjusted in position endwise of itself comprising a locking clip formed of resilient material, said resilient clip having a central bight contacting the said one element, the material of said bight being reversed on itself at said bight to provide a pair of spaced limbs straddling the said one element and in contact therewith, an aperture in each limb through which the said other element extends, said limbs being arranged to be pressed together to release the said other element for sliding in said bore and said apertures to adjust the position of said other element with respect to said one ele ment, and being arranged to be released whereby said limbs engage said other element for maintaining the position thereof fixed With respect to said rail.

References Cited in the file of this patent UNETED STATES PATENTS 737,039 Stone Aug. 25, 1903 1,261,471 Bach Apr. 2, 1918 2,407,527 Anstedt Sept. 10, 1946 2,503,144 Willers Apr. 4, 1950 FOREIGN PATENTS 826,525 France Jan. 4, 1938