Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
  • B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
  • B25B7/126—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears with fluid drive
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D7/00—Bending rods, profiles, or tubes
  • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B5/00—Clamps
  • B25B5/06—Arrangements for positively actuating jaws
  • B25B5/061—Arrangements for positively actuating jaws with fluid drive

Definitions

• the invention aims to create a device with which a hand lever operated hand plate former can be converted into a plate former with a hydraulic or pneumatic drive.
• the new pneumatic conversion kit is a pneumatic auxiliary drive with which sheet formers with manual operation (FIG. 1) available on the market can be converted to pneumatic operation (FIG. 2).
• the conversion kit is mounted on the back of the sheet metal former after the hand lever 1 has been removed.
• the mechanism of the drive (FIG. 3) is controlled via a footplate 2.
• By opening a valve 3 on the tread plate compressed air is admitted into a membrane cylinder 5 via a compressed air hose 4.
• a push rod 6 is pressed horizontally out of the cylinder.
• At the front end of the push rod is one Pressure plate 7 attached, which converges towards the front in a wedge shape.
• a lower and an upper lever 8 are each supported by a roller 16 on the wedge-shaped surfaces 17 of the pressure plate.
• the pressure plate is pressed between the levers by the push rod.
• the mounting plate 9 serves as a guide.
• the levers slide along the diverging surfaces 17 of the pressure plate and are thereby pressed apart. Characterized in that the levers are mounted on an axis of rotation 10, the front ends of the levers on which the tool insert 11 is fastened are pressed against one another. The tool closes.
• the tread plate valve By relieving the pressure on the tread plate, the tread plate valve closes, whereupon the quick-release valve 12 on the membrane cylinder opens and the compressed air flows out of the membrane cylinder.
• the pressure in the membrane cylinder drops and the push rod is pulled back into the basic position via a return spring in the membrane cylinder.
• the compressed air supply in the membrane cylinder can be finely controlled using the treadle valve.
• the valve opens more or less accordingly and accordingly more or less compressed air flows into the membrane cylinder. Thanks to this possibility of fine control, the working movement can be carried out as quickly or slowly, strongly or weakly as desired.
• the membrane cylinder is screwed to the mounting plate via two spacers 13.
• the thrust path of the pressure plate can be determined with the spacers.
• a pressure is created between the conversion kit and the hand plate former.
• the fastening plate 9 is connected to the axes of rotation of the tool arms 10 via two holding brackets 14 (FIG. 4).
• the additional drive is with a protective casing 15 provided. It protects against accidents and prevents dirt and any objects from entering the mechanism. This reduces the possibility of damage.
• the device according to the invention has significant advantages.
• the pneumatic conversion kit is inexpensive and easy to assemble.
• the existing additional drives which are only available for large sheet formers, cost ten to fifteen times more than this new small drive.
• the fine control via the step plate allows a differentiated operation of the tool, which is on a par with the manual operation. No physical strength is required to operate it. This allows you to work without fatigue.
• the drive can be operated by foot pressure, both hands are free to guide the workpiece to be shaped. This means that demanding work can be carried out by a single person. An assistant who helps hold the workpiece is no longer necessary. Thanks to the protective casing, the drive is also convincing in terms of accident safety.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manipulator (AREA)
• Reciprocating Pumps (AREA)
• Containers And Plastic Fillers For Packaging (AREA)
• Actuator (AREA)
• Rehabilitation Tools (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4235072

Family Applications (1)

Country Status (5)

Cited By (1)

Citations (4)

• 1990
  • 1990-07-27 CH CH2494/90A patent/CH682306A5/de not_active IP Right Cessation
• 1991
  • 1991-07-05 EP EP91911842A patent/EP0493549B1/de not_active Expired - Lifetime
  • 1991-07-05 DE DE59102014T patent/DE59102014D1/de not_active Expired - Fee Related
  • 1991-07-05 WO PCT/CH1991/000144 patent/WO1992002338A1/de active IP Right Grant
  • 1991-07-05 AT AT91911842T patent/ATE107560T1/de not_active IP Right Cessation

Patent Citations (4)

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