Claims
- 1. Safety tool for supporting and holding at least one interchangeable utensil (1), in particular to the upper beam of a press-bending machine by means of at least one clamping means joined to the said beam, wherein said safety tool includes a holding clip (4), joined to the support body (2) of a clamping means for the utensil (1) and wherein said safety tool comprises a safety hook, having on the opposite side a terminal hooking tooth that enters into a groove along the side of the shank of the utensil, characterised in that said holding clip (4) has a series of teeth (411, 412, 414) facing the utensil-shank abutting reference surface (22) of the support body (2) to engage, by an intermediate safety hook (6), the shank (12) of said utensil (1), and of which at least one of the teeth (411, 412, 414) is used for holding said intermediate safety hook (6) in a temporary suspended position, while a second one acts upon the said intermediate safety hook (6), the said intermediate safety hook (6) having at least one seat along the side, and in which at least one tooth (411, 412, 414) of the holding clip (4) fits, while on the opposite side there is a lower terminal hooking tooth (62) that enters into a groove (13) along one side (122) of the shank (12) of said utensil (1).
- 2. Safety tool according to claim 1 for supporting and holding at least one interchangeable utensil, in particular to the upper beam of a press-bending machine by means of at least one clamping system joined to the said beam, characterised by the fact that it includes a holding clip (4), joined to the body (2) of a clamping system for the utensil (1) with the said clip (4), being hinged on one side, is acted upon by a pneumatic or hydraulic mechanism, while on the opposite side there is a series of teeth (411, 412, 414) facing the reference surface (22) of the utensil (1) support body (2), and of which at least one of the said teeth is used for holding an intermediate safety hook (6) in a temporary suspended position, while the lower tooth (412) acts upon the said intermediate safety hook (6), the said intermediate safety hook (6) having at least one seat along the side, and in which at least one tooth of the holding clip (4) fits, while on the opposite side there is a lower terminal hooking tooth (62) that enters into a groove (13) along one side (122) of the shank (12) of a utensil (1).
- 3. Safety tool according to claims 1 and 2, characterised by the fact that along with the intermediate safety hook (6), there is an inclined plane spring (7) for raising the hook (6), with the end (41) of the holding clip (4) that acts upon the surface of the spring.
- 4. Safety tool according to previous claim 3, characterised by the fact that al least one intermediate safety hook (6) is positioned between the flat reference surface (22) of the utensil (1) support body (2) and the lower end (412) of the holding clip (4), and partially acted upon by the spring (7) for raising the hook (6).
- 5. Safety tool according to the previous claims, characterised by the fact that at least one hook (6) is made up of a monolithic body and that foresees:
two symmetrical spikes (61) along the upper side, that stick out and face the holding clip (4), and which temporarily act upon the holding clip (4) by sitting inside the groove (413) formed along the respective upper tooth (411); and a body (63) facing the same side which supports, in a straddling fashion, the spring (7), leaving a certain amount of space between the two surfaces; while on the opposite side, that is, on the surface of the intermediate safety hook (6) facing the surface (22) of the utensil (1) support body (2), transversally and in correspondence with lower edge, there is a main tooth (62); a secondary tooth (65); and a further tooth (66) that co-operates with a portion of the holding clip (4).
- 6. Safety tool according to the previous claims, characterised by the fact that the main tooth (62) of the hook (6) has a flat reference and lifting surface (621) and an inclined leading surface (622) for lateral movement.
- 7. Safety tool according to the previous claims, characterised by the fact that the intermediate safety hook (6) has a seal (64) partially inserted in a seat (641) on the side facing the surface (122) of the shank (12) to be clamped.
- 8. Safety tool according to the previous claims, characterised by the fact that the spring (7) for lifting the hook (6) has a “V” conformation, the said spring (7) being made of spring steel which partially overlaps and joins, by straddling, a corresponding male protrusion (63), which serves as a body, transversally formed into the intermediate safety hook (6), and that between the said spring (7) and the back (63) of the hook (6) there is a certain amount of play, so that the spring (7), when acted upon by the tooth (412), is deflected in a controlled manner.
- 9. Safety tool according to the previous claims, characterised by the fact that the clamping unit joined to the upper beam of a utensil (1) in a press-bending machine is made up of an intermediate set (A) made up of a utensil (1) support body (2) with an attachment (21) to the upper beam of the press-bending machine on the upper side, while the lower part of the said intermediate body (2) has a vertical reference plane (22) along which, in taking up the utensil (1), the corresponding flat surface on the side (121) of the shank (12) is positioned.
- 10. Safety tool according to the previous claims, characterised by the fact that the intermediate body (2) has a pneumatic chamber under pressure (23) which pushes and draws back a piston (3) with a perimeter seal (31), the said piston (3) being used to act upon the upper end (42) of a holding clip (4) which, by means of jointed screws (5), is hinged to the intermediate body (2) to transfer the push of the piston (3) to the lower end (41) of the holding clip (4).
- 11. Safety tool according to the previous claims, characterised by the fact that the lower end (41) of the holding clip (4) has at least two longitudinal parallel teeth (411) and (412) turned to the same side, the first of which, the upper tooth (411) having a groove (413), on the inside of which the upper portion (61) of at least one intermediate safety hook (6) is inserted.
- 12. Safety tool according to the previous claims, characterised by the fact that the second tooth (412) of the holding clip (4) coincides with the lower edge of the of the holding clip (4) and is similar to a half round lip which sticks out towards the surface (22) of the body of the intermediate body (2).
- 13. Safety tool according to the previous claims, characterised by the fact that the holding clip (4) has a catch (414) to which the tooth (66) of the intermediate safety hook (6) is temporarily hooked.
- 14. Intermediate (A1) with a multiple attachment for utensils, characterised by the fact that it has two mirror-image safety tools according to the previous claims mounted on the front or the back, with each mechanism including at least one holding clip (4) for each side of the upper beam, and which acts upon at least one corresponding intermediate safety hook (6) by means of a spring (7) positioned between for lifting the hook, and joined to the said intermediate safety hook (6).
- 15. Intermediate (A2) with a mixed attachment for utensils according to the previous claims, characterised by the fact that only one side has a safety tool according to previous claims, while on the other side there is a mechanical holding system by means of a gripping plate on the shank (12) and fastened by at least one screw to the intermediate (A2).
- 16. Intermediate according to claim 15, characterised by the fact that the mechanical gripping plate for the shank (12) is joined to the intermediate (A2) by means of at least one screw that is accessible through a hole on the fastening side of the holding clip (4).
- 17. Intermediate (A3) with attachment to the upper beam that is axial with respect to the load axis of the utensil (1), characterised by the fact that there is a safety tool according to previous claims on one side with a holding clip (4) that acts upon at least one corresponding intermediate safety hook (6) by means of a spring (7) for lifting the hook positioned between, and joined to the said intermediate safety hook (6).
- 18. Utensil mounted on intermediates according to the previous claims, characterised by the fact that it is made up of a metallic body that forms the punch (11) that presses against the sheet of metal at its lower end, while there is a shank (12) at the top end with a groove (122) that is “C”-shaped (13) if seen in section along at least one side, and in which the shank (12) of the utensil (1) is not in line with respect to the load axis.
- 19. Utensil mounted on intermediates according to the previous claims, characterised by the fact that the utensil (1) is of the standard type with a safety groove (13).
- 20. Utensil mounted on intermediates according to the previous claims, characterised by the fact that the utensil (1) is of the type with a mirror-image double groove (13), each one along the respective side (121, 122).
- 21. Utensil mounted on intermediates (A3) and (A4) according to at least one of the previous claims, characterized by the fact that there is a shank (12) symmetrical with the load axis with, along at least one corresponding side, a groove (13) as a safety feature.
Priority Claims (1)
Number |
Date |
Country |
Kind |
TV99A000134 |
Nov 1999 |
IT |
|
Parent Case Info
[0001] This application is a continuation of pending International Application No. PCT/IT00/00473 filed Nov. 22, 2000, which designates the United States and claims priority of Italian Patent Application No. 99A0001 34 filed Nov. 30, 1999.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/IT00/00473 |
Nov 2000 |
US |
Child |
10158751 |
May 2002 |
US |