US3841142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for setting self-moving bolster in presses
Assignee: Komatsu Ltd
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Filing: 1972-06-12
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Granted: 1974-10-15
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Expires: 1992-06-12
Abstract
Abstract Self-moving bolster and the related devices used in press machines for pressing steel plates, operate to raise and lower automatically through wheels which are provided in the bolster itself. In order that said bolster can be set at a predetermined position smoothly and firmly in the press room, cooperating abutting members and positioning members are provided on said bolster and on the bed of the press, whereby the entry of said self-moving bolster into the press room of the press, positioning of the bolster therein or the removal of said self-moving bolster from the press room are all performed automatically.
Inventors
- 👤 H Aisuta
- 👤 H Asamoto
- 👤 T Ueda
- 👤 Y Koezuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:13
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/08; B21J13/085; B21D; B21D37/00; B21D37/14; Y; Y10; Y10S; Y10S100/00; Y10S100/918
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
290 words
A method for setting a self-moving bolster in a press comprising the steps of advancing said self-moving bolster on rails into a press room of said press; stopping said bolster by abutting an abutting member provided on the lower surface of a carrier for said bolster against an abutting member provided on the upper surface of a bed in said press room; said abutting member of said bolster being provided with a vertical abutting surface and also being provided with a center which conforms with a longitudinal center line of said carrier; with said abutting member of said bed being provided with a vertical abutting surface engageable with said vertical abutting surface of the abutting member of said bolster; actuating a raising and lowering mechanism provided for said bolster in order to lower said bolster by retracting wheels provided on said bolster; and engaging two positioning members, each having a cross-shaped engaging projection and being provided on the lower surface of said bolster with two position holes, each having a cross-shaped groove and being provided on the upper surface of the bed in said press room, one of said positioning members being arranged on one side of the longitudinal center line at one end of said carrier, and the other of said positioning members being arranged on the other side of the longitudinal center line at the other end of said carrier, one of said positioning holes being arranged at a position to engage with one of said positioning members, and the other of said positioning holes being arranged at a position to engage with the other of said positioning members, whereby the bottom portion of said bolster is brought into close contact with the bed in said press room.
Claim 2
Independent Claim
290 words
A method for setting a self-moving bolster in a press comprising the steps of advancing said self-moving bolster on rails into a press room of said press; stopping said bolster by abutting an abutting member provided on the lower surface of a carrier for said bolster against an abutting member provided on the upper surface of a bed in said press room; said abutting member of said bolster being provided with a vertical abutting surface and also being provided with a center which conforms with a longitudinal center line of said carrier; with said abutting member of said bed being provided with a vertical abutting surface engageable with said vertical abutting surface of the abutting member of said bolster; actuating a raising and lowering mechanism provided for said bolster in order to lower said bolster by retracting wheels provided on said bolster; and engaging two positioning members, each having a cross-shaped engaging projection and being provided on the lower surface of said bolster with two position holes, each having a cross-shaped groove and being provided on the upper surface of the bed in said press room, one of said positioning members being arranged on one side of the longitudinal center line at one end of said carrier, and the other of said positioning members being arranged on the other side of the longitudinal center line at the other end of said carrier, one of said positioning holes being arranged at a position to engage with one of said positioning members, and the other of said positioning holes being arranged at a position to engage with the other of said positioning members, whereby the bottom portion of said bolster is brought into close contact with the bed in said press room.
Claim 3
Dependent Claim
257 words
Apparatus for setting a self-moving bolster by transporting said bolster into and out of a press room provided in a press including a bed, said apparatus comprising a driving mechanism for moving said bolster, wheels provided on said bolster, a carrier for said bolster, a raising and lowering mechanism for raising and lowering the wheels of said bolster, an abutting member located on said bolster and having a vertical abutting surface and also having a center which is conformed with a longitudinal center line of said carrier for said bolster, an abutting member provided on said bed having a vertical abuttinG surface engageable with said vertical abutting surface of said abutting member of said bolster, two positioning members, each having a cross-shaped engaging projection and being provided on the lower surface of said bolster, one of said positioning members being arranged on one side of the longitudinal center line and at one end of the carrier of said bolster and the other of said positioning members being arranged on the other side of the longitudinal center line and at the other end of said carrier, two positioning holes provided on the upper surface of said bed in said press room, each having a cross-shaped groove, one of said positioning holes being arranged at a position to engage with one of said positioning members, and the other of said positioning holes being arranged at a position to engage with the other of said positioning members, said cross-shaped engaging projection being configured to fit closely within said cross-shaped groove.
Claim 4
Dependent Claim
257 words
Apparatus for setting a self-moving bolster by transporting said bolster into and out of a press room provided in a press including a bed, said apparatus comprising a driving mechanism for moving said bolster, wheels provided on said bolster, a carrier for said bolster, a raising and lowering mechanism for raising and lowering the wheels of said bolster, an abutting member located on said bolster and having a vertical abutting surface and also having a center which is conformed with a longitudinal center line of said carrier for said bolster, an abutting member provided on said bed having a vertical abuttinG surface engageable with said vertical abutting surface of said abutting member of said bolster, two positioning members, each having a cross-shaped engaging projection and being provided on the lower surface of said bolster, one of said positioning members being arranged on one side of the longitudinal center line and at one end of the carrier of said bolster and the other of said positioning members being arranged on the other side of the longitudinal center line and at the other end of said carrier, two positioning holes provided on the upper surface of said bed in said press room, each having a cross-shaped groove, one of said positioning holes being arranged at a position to engage with one of said positioning members, and the other of said positioning holes being arranged at a position to engage with the other of said positioning members, said cross-shaped engaging projection being configured to fit closely within said cross-shaped groove.
Claim 5
Dependent Claim
100 words
Apparatus according to claim 2 wherein said raising and lowering mechanism for raising and lowering the wheels of said bolster comprises a motor for operating said raising and lowering mechanism, a threaded shaft connected to be rotated by said motor, a transfer piece engaging said threaded shaft, a pivoted link mechanism connected with said transfer piece to be pivotally actuated thereby, and a bifurcated supporting member pivotally mounted at one end thereof upon a fixed fulcrum on said bolster, said bifurcated supporting member rotatably supporting said wheels and being pivotally engaged with said linking mechanism at an opposite end thereof.
Claim 6
Dependent Claim
194 words
A moving bolster apparatus adaptable for moving a bolster to and from a press room provided in a press, including a bed, said apparatus comprising a bolster, a carrier for mounting said bolster, said bolster including pressure pin inserting holes, each having an annular stepped portion at the upper end thereof, pressure pins configured to be inserted into said inserting holes, said pressure pins having a height which is shorter than the height of said bolster, and an enlarged upper portion adaptable to engage said annular stepped portion of said inserting holes to enable said pressure pins to be suspended within said inserting holes, whereby when said bolster is transferred relative to said press room, said pressure pins are supported by said bolster itself in a manner whereby the lower ends of said pressure pins may be positioned above the surface of said bed in said press room, and whereby when said moving bolster is set in a predetermined position on said bed in said press room, said pressure pins are caused to project from the upper surface of said bolster by operation of a die cushion apparatus provided in said moving bolster apparatus.
Claim 7
Dependent Claim
194 words
A moving bolster apparatus adaptable for moving a bolster to and from a press room provided in a press, including a bed, said apparatus comprising a bolster, a carrier for mounting said bolster, said bolster including pressure pin inserting holes, each having an annular stepped portion at the upper end thereof, pressure pins configured to be inserted into said inserting holes, said pressure pins having a height which is shorter than the height of said bolster, and an enlarged upper portion adaptable to engage said annular stepped portion of said inserting holes to enable said pressure pins to be suspended within said inserting holes, whereby when said bolster is transferred relative to said press room, said pressure pins are supported by said bolster itself in a manner whereby the lower ends of said pressure pins may be positioned above the surface of said bed in said press room, and whereby when said moving bolster is set in a predetermined position on said bed in said press room, said pressure pins are caused to project from the upper surface of said bolster by operation of a die cushion apparatus provided in said moving bolster apparatus.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |