US2278741A - Portable rivet heading tool - Google Patents

Description

April 1942. A. E. R'YLANDER 2,278,741

PORTABLE RIVET READING TOOL Filed Dec. 1, 1959 1 INVENTOR. fi/vpezw IPYl/QA/Dff ATTORNEY.

Patented Apr. 7, 1942 PORTABLE RIVET HEADING TOOL Andrew E. Rylander, Detroit, Mich., assignor to The Midland Steel Products Company, Cleveland, Ohio, a corporation of Ohio Application December 1, 1939, Serial No. 307,142

4 Claims. I (CI. 78-19) This invention relates to new and useful improvements in rivet heading tools of the mobile or portable type which are too heavy to be manually supported by the operator.

An important object of the invention is to provide means for suspending such tools with the mouth of the jaws thereof disposed in proper working position to engage the work.

Another important object of the invention is to provide a heavy portable tool operated by a hydraulic cylinder which is arranged with respect to the tool so that the heavy mass represented by the combined weight of the tool and cylinder can be supported in balanced condition with its jaws in a certain plane whereby it can be readily moved by the operator and operated at all angles without moving the work and with a minimum of effort.

Other objects and advantages of the invention will become apparent during the course of the following description.

In the accompanying drawingforming a part of the application and wherein like numerals are employed to designate like parts throughout the several views.

Fig. 1 is a perspective view of one form of the tool and suspension means.

Fig. 2 is a similar view of another form of riveting tool and suspension means.

The portable type of rivet heading tool illustrated in the drawing has been found advantageous in the manufacture of heavy products, such as automobile frames, requiring the use of many cold headed rivets to hold parts thereof together. These frames require the heading of both vertical and horizontally disposed rivets and the riveting tool is so mounted as not to require moving, tilting or turning of the product and the minimum movement of the tool to achieve speed of production.

Referring now more particularly to the drawing and to Fig. l, the numerals l and 2 designate a pair of relatively movable jaws having substantially parallel gripping portions 3 and 4 respectively, provided with rivet sets and 6. These jaws are very heavy and sturdy to withc stand high hydraulic riveting pressures. The

upper jaw 2 is provided with a pair of depending integral parallel legs 1 and to which is fulcrumed a leg 8 integral with the lower jaw, by means of a fulcrum pin 9. The rear end of the lower jaw I is provided with a rearward longitudinal extension H1 in the same plane with the jaw portion 3 and the upper jaw 2 is provided with a broader rearward longitudinal extension ll substantially parallel to the extension III of the lower jaw when the jaws are in closed position. This extension H is provided with an opening extending through its upper and lower faces to receive a reduced integral extension of a hydraulic cylinder I2 which is provided with flexible hose connections l3 and I4 for the inlet and outlet of fluid from a high pressure pump or other suitable source. The reduced portion of the cylinder is rigidly fastened in the opening of the extension, thereby disposing the cylinder normal to the jaw. This cylinder is provided with a pair of vertically spaced later-ally extending arms l5 to which a vertical hand grip I6 is secured, whereby the tool may be manipulated. An electric push button I! is provided in the upper end of the hand'grip to make and break a circuit through conductors l8 for controlling a valve, not shown, for admitting liquid under pressure to the hydraulic cylinder l2 for operating the jaws of the tool.

The ram of the cylinder is designated by the numeral l9 and extends from the cylinder and underside of jaw 2 toward the extension ill to engage an abutment piece or socket member on the latter. The ram or plunger l9 has secured thereto an enlargement 2| aswide as the extension I!) of jaw I, so that a pair of links 22 may be pivotally connected thereto at their upper ends as at 23 to be arranged upon opposite sides of extension In. The lower ends of these links 22 are slotted as at 24 to receive pins 25 projecting from opposite sides of extension I!) so that retraction of the ram plunger I9 will automatically open the jaws 3 and 4. Upon projection of the ram plunger l9'toward the jaw extension III, the slots 24 will permit the lower end of the plunger to engage the socket member 20 of the lower jaw andmove the jaw ends 3 and 4 together to cold head a rivet under terrific pressure. A second handle 26 may project longitudinally from the rear end of jaw extension ID to facilitate handling of the tool.

For suspending and supporting the weight of the tool so that the jaw portions thereof will be normally disposed in a substantially horizontal position, a U-shaped balancing bracket 2'! embraces the three square sides of jaw extension II and is secured thereto by means of screws 28. The free ends 29 of the two arms of this U-shaped bracket are upwardly and angularly disposed as well as being perforated substantially above the fulcrum 9 to receive a horizontalpin 30 which passes through a block 3| or trunnions projecting from opposite sides of the block 3|. This block is divided as shown and is provided with a ball-shaped socket to receive the spherical end 32 of a vertical stud 33 extending through a longitudinally extending slot in a sleeve 34 to be pivotally connected therein on a horizontal axis 35. The two ends of an enlarged somewhat diamond-shaped loop 36 are aligned and bent inwardly toward each other and are inserted into opposite ends of the sleeve 34 thereby forming a second horizontal axis upon which the tool and mounting may swing or roll in either direction as shown by the arrow to dispose the hydraulic cylinder |2 partially extended through the loop 36 or arranged beneath it with thejaw portions 3 and 4 disposed substantially vertically for heading a horizontally disposed rivet. The entire ap paratus is suspended from a cable 31 wound upon the usual commercial spring balance reel 38', which may be suspended from a carriage of a monorail so that the tool can be readily moved lengthwise of the article being riveted with the minimum exertion on the part of the operator. Due to the provisions of the ball and socket joint, it will be appreciated that the riveting tool may be swivelled about a vertical axis without twisting the cable 3'! and the tool may be swung in a small are upon its horizontal axis 30 or than a larger arc in the direction of the arrow shown in Fig. 1 upon either the axis 30 or the axis of the inwardly directed ends of the loops 35. Lateral swinging movement of the tool is also permissible upon the ball or axis of pin 35. It will thus be apparent that the riveting tool is universally suspended from approximately the center of balance of the mass composed of the two pivoted jaws and the hydraulic cylinder l2. As this combined mass weighs between 50 and '75 pounds, it would be extremely diflicult, if not impossible, for the operator to handle the riveting tool without any means of support for any length of time without fatigue, and production would be materially curtailed. However, with the suspension herein illustrated, the riveting tool may be handled with the facility of a half-pound object and may be operated to cold head three-eighth inch rivets almost as fast as the operator can move has thumb or index finger together and with the same kind of action. The closing of the jaws is effected by hydraulic action by simply depressing the push button and jaw opening is efiected by mere release of the push button.

In the modification shown in Fig. 2, an operators hand is shown in dotted lines holding the riveting tool against the action of gravity to head a vertically disposed rivet. The normal suspended i position of the tool is swung down from the position shown in Fig. 2, upon the horizontal axis 30 to dispose the rivet heading portions 3 and 4 of the jaws in a substantially horizontal position. In this modification there is provided a lower jaw 40 having a right angular extension 4| and an upper portion 42 disposed at an obtuse angle to the shank portion 4| for supporting the hydraulic cylinder I2 with its axis at an angle to the jaw portion 3 so that the ram plunger I9 is disposed at an angle other than normal to a jaw 43. This jaw has its inner end bifurcated and fulcrumed to the extension 4| by means of fulcrum 44. Adjacent the free end of jaw 43 in its upper surface, is provided a seat or cavity 45 to receive the free end of the ram plunger for delivering maximum pressure to close the jaws. The ram I9 is provided with an enlargement 2| for connecting the pair of links 22 to the movable V jaw that it is opened upon retraction ofthe' ram plunger. The construction of these links 22 is the same as in the preceding form of invention.

For suspending this tool, a U-shaped balancing bracket 46 similar to the bracket 21 is provided and is secured around the extension 42 of the jaw 40 so that its free ends extend considerably behind the extension 4|, whereby the combined weight of the hydraulic cylinder l2 and the jaws will move the tool by gravity in the direction of the arrow in Fig. 2 to dispose the jaws in substantially vertical planes for heading horizontally disposed rivets. The tool is suspended from a pair of links 47 connected to the axis 30' and these links are in turn fulcrumed on a horizontal pivot 48 to a block 49 having a second pin 50 extending therethrough at right angles to the pin 48 for connecting a U-shaped bracket 5| thereto. A cable 53 is swivelly connected to the bracket 5| for supporting the weight of the tool and this cable is wound upon the usual counterbalance Wheel 38'.

' It will thus be apparent that the modification shown in Fig. 2 can be swung upon the axis 30' to head rivets which are disposed both vertically and horizontally and that the entire tool can also be swung laterally to difierent angles upon the axis 50 while the whole tool can be turned about the axis of cable 53. If desired, the jaw 43 may as an alternative be provided with an additional handle 54 having a push button associated therewith to operate a solenoid valve by means of the conductor 55, for controlling fluid under pressure to the hydraulic cylinder |2 when the tool hangs by gravity in its normal position with the jaws 3 and 4' disposed substantially horizontally.

It will of course be understood that various changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the appended claims.

' I claim:

1. A hydraulic rivet heading tool comprising a pair of jaws, a hydraulic ram cylinder securely mounted upon one jaw and having its ram cooperating with the other jaw, a balancing bracket secured to one of said jaws and having a horizontal fulcrum, a member mounted upon said fulcrum, a stud swivelly connected to said 'member, a sleeve pivotally connected to said stud, and a suspension loop having its ends bent inwardly and rotatably mounted in the ends of said sleeve.

2. A hydraulic rivet heading tool comprising a relatively stationary C-shaped jaw, a movable jaw pivotally connected to the C-shaped jaw, a hydraulic cylinder rigidly mounted on the C- shaped jaw and having a ram engaging the movable jaw to power close the jaws, linkage connecting the ram and said movable jaw to cause the same to open during retraction of the ram, a balancing bracket secured to the forward end of the C-jaw and extending beyond the rear end and having a horizontal pivot arranged rearwardly of the C-jaw, and means for suspending the jaw from said horizontal fulcrum at a point substantially above the center of gravity of the combined weight of the jaws and hydraulic cylinder.

3. A hydraulic riveting tool comprising a pair of riveting jaws, a pair of parallel arms secured to one of said jaws, said arms having free ends projecting beyond said jaws, a horizontal pivot extending between the free ends of said arms and disposed substantially above the center of gravity 5 pin.

yond said jaw, a horizontal pin connecting the free ends of said arms and disposed substantially above the center of gravity of the tool, and suspension means associated with said horizontal ANDREW E. RYLANDER.

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