CA2176418A1 - Metal shears - Google Patents
Metal shearsInfo
- Publication number
- CA2176418A1 CA2176418A1 CA002176418A CA2176418A CA2176418A1 CA 2176418 A1 CA2176418 A1 CA 2176418A1 CA 002176418 A CA002176418 A CA 002176418A CA 2176418 A CA2176418 A CA 2176418A CA 2176418 A1 CA2176418 A1 CA 2176418A1
- Authority
- CA
- Canada
- Prior art keywords
- toggle
- jaw
- pivoting member
- support arm
- adjusting screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
- B26B17/02—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact with jaws operated indirectly by the handles, e.g. through cams or toggle levers
Abstract
A metal shears comprises a toggle set, a cutting set, a pair of grips, and an adjustment set. The cutting set is composed of a first jaw, a secnd jaw and a pair of cover plates. The first and the second jaws are respectively pivoted with the cover plates and are respectively provided with a blade.
The toggle set is composed of a first toggle and a second toggle, which are pivoted by a first pivoting member. The first and the second toggles are pivoted respectively with the first jaw and the second jaw by a second pivoting member. The grips are fastened respectively with the first toggle and the second toggle. The adjustment set is mounted on the first jaw for adjusting the distance between the first pivoting member and the second pivoting member so as to change the angle formed by the blades of the first and the second jaws.
The toggle set is composed of a first toggle and a second toggle, which are pivoted by a first pivoting member. The first and the second toggles are pivoted respectively with the first jaw and the second jaw by a second pivoting member. The grips are fastened respectively with the first toggle and the second toggle. The adjustment set is mounted on the first jaw for adjusting the distance between the first pivoting member and the second pivoting member so as to change the angle formed by the blades of the first and the second jaws.
Description
2176~18 METAL SHEARS
FIELD OF THE INVENTION
The present invention relates generally to a metal shears, and more particularly to the metal shears having jaws that can be adjusted to form therebetween a desired angle.
BACKGROUND OF THE INVENTION
The conventional metal shears is generally composed of a toggle set, a cutting set and a pair of hand grips. The toggle set comprises a pair of toggles fastened pivotally with a locating bolt. The cutting set comprises a pair of jaws having a blade. The jaws are respectively pivoted at the lower segment thereof with the toggles. The hand grips are fastened with the lower ends of the toggles. As the toggles are actuated by the hand grips to move in opposite directions, two blades are thus caused to move accordingly to facilitate the cutting of a metal material, such as a screw, a metal wire, etc.
Such a prior art metal shears as described above is defective in design in that there is always a gap between two blades when the jaws 2176~18 -are moved to be closest together. The gap undermines the cutting effect of the prior art metal shears. In order to elimin~te the gap referred to above, the locating bolt is modified such that the locating bolt is provided with an eccentric portion which is received in the jaw. As a result, the gap between two blades can be minimi7ed by rotating the locating bolts to adjust the distance between the jaws. However, the gap still remains if two blades are not parallel to each other.
SUMMARY OF THE INVENTION
It is therefore the primary objective of the present invention to provide a metal shears, which comprises two blades that can be so adjusted as to be parallel to each other.
It is another objective of the present invention to provide an improved metal shears comprising two blades that can be so adjusted as to be parallel to each other.
It is another objective of the present invention to provide an improved metal shears comprising two blades which can be adjusted easily to form therebetween a desired angle to facilitate the cutting of a metal material.
The foregoing objectives of the present invention are attained by an improved metal shears, which comprises a toggle set, a cutting set, and a pair of grips. The toggle set is made up of a first toggle and a second toggle, which are respectively fastened pivotally by means of a 21 76~18 first pivoting member. The cutting set comprises a first jaw, a second jaw, and a pair of cover pieces. The first jaw and the second jaw have a blade which is pivoted to the cover piece by a locating bolt and is further pivoted to the corresponding toggle by means of a second pivoting member. The hand grips are fastened with the first and the second toggles. The first toggle is provided with an adjustment set for adjusting the distance between the first pivoting member and the second pivoting member so as to force the first jaw to swing to change the angle formed by the blades.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an exploded view of an embodiment of the present invention.
FIGS. 2-4 are schematic views illustrating in series the adjustment of the angles formed by the blades of the first and the second jaws of the embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
As shown in all drawings provided herewith, an improved metal shears 10 embodied in the present invention is composed of a toggle set 12, a cutting set 14, and a pair of grips 16.
2l764l8 The toggle set 12 comprises a first toggle 20 and a second toggle 30, which are provided respectively at the lower segments thereof with protuberances 22 and 32, and are fastened pivotally at the opposite sides of the upper segments thereof by means of a first pivoting member 121.
The cutting set 14 comprises a first jaw 40, a second jaw 50, and a pair of cover plates 60. The first and the second jaws 40 and 50 are provided respectively at the upper segments thereof with blades 42 and 52 opposite to each other. The first and the second jaws 40 and 50 are respectively pivoted at the midsegments thereof to the cover plates 60 by a pair of locating bolts 62, and at the lower segments thereof to the corresponding first and second toggles 20 and 30 by a pair of second pivoting members 141 similar in construction to a threaded rod. The second pivoting members 141 are kept apart from the first pivoting member 121 by an appropriate distance.
The grips 16 are fastened respectively with the lower ends of the first and the second toggles 20 and 30.
In operation, the first and the second toggles 20 and 30 are actuated by the grips 16 to swing on the axis of the first pivoting member 121 such that the first jaw 40 and the second jaw 50 are forced to swing respectively on the axes of the locating bolts 62 so as to execute the cutting of a metal wire or screw by moving the blades 42 and 52 apart or close together.
The metal shears 10 of the present invention is characterized in construction in that the first toggle 20 is provided at the upper segment thereof with a first support arm 24 and a second support arm 26, which 2176~18 are separated from each other by an empty portion 70. The first arm 24 is fastened pivotally at the upper end thereof with the first pivoting member 121 while the second support arm 26 is fastened pivotally at the upper end thereof with the second pivoting member 141 corresponding thereto. The empty portion 70 has a first threaded hole 72 coaxial with a through hole 74 of the second support arm 26. The empty portion 70 further has a second threaded hole 76 separated from the through hole 74 by an appropriate distance.
The first toggle 20 is further provided with an adjustment set 18, which comprises a first adjusting screw 80 having a small diametric end 801 engageable with the first threaded hole 72 via the through hole 76.
The first adjusting screw 80 further has a large diametric end 802 capable of urging one side of the second support arm 26. The adjustment set 18 further comprises a second adjusting screw 82 engageable with the second threaded hole 76 such that one end of the second adjusting screw 82 is located in the empty portion 70 and is capable of urging one side of the first support arm 24.
In operation, the small diametric end 801 of the first adjusting screw 80 is engaged with the first threaded hole 72 such that the large diametric end 802 is caused to urge the second support arm 26 to swing to one side. The second support arm 26 is forced to swing to another side by the second adjusting screw 82 which is kept in the state of urging the first support arm 24.
As illustrated in ~IG. 2, a V-shaped gap is formed between the blades 42 and 52 when the protuberances 22 and 32 of the first toggle 20 and the second toggle 30 are pressed against each other. In case of such 2~ 76~1~
-an incident as described above, the first adjusting screw 80 is first unfastened before the second adjusting screw 82 is turned to force the second support arm 26 to swing toward another side so as to cause an increase in distance between the first and the second pivoting members 121 and 141 which are pivoted with the first toggle 20. As a result, the first jaw 40 is actuated to swing such that the blade 42 is caused to swivel until the blade 42 is parallel to the blade 52 of the second jaw 50.
However, there may be still a gap located between the blades 42 and 52, as illustrated in FIG. 3. The gap can be elimin~ted by adjusting the locating bolts 62.
In case of an incident in which an inverted V-shaped gap (not shown in the drawings) is formed between the blades 42 and 52 when the protuberances 22 and 32 of the first and the second toggles 20 and 30 are pressed against each other, the second adjusting screw 82 is first unfastened before the first adjusting screw 80 is turned to force the second support arm 26 to swivel toward the first support arm 24 so as to bring about a decrease in distance between the first and the second pivoting members 121 and 141. As a result, the first jaw 40 is actuated to swing to elimin~te, in conjunction with the adjusting of the locating bolts 62, the inverted V-shaped gap located between the blades 42 and 52.
It must be pointed out here that the first and the second adjusting screws 80 and 82 have both adjusting function and locating function. For instance, when the first adjusting screw 80 is adjusted to actuate the second support arm 26 to swivel to locate at an appropriate position, the second adjusting screw 82 can be turned to urge the second support arm 26 in an opposite direction so as to prevent the first adjusting screw 80 2l 76~l8 from being unfastened or disengaged at the time when the metal shears 10 of the present invention is at work. In other words, the second adjusting screw 82 has the function of locating the first adjusting screw 80, and vice versa.
FIELD OF THE INVENTION
The present invention relates generally to a metal shears, and more particularly to the metal shears having jaws that can be adjusted to form therebetween a desired angle.
BACKGROUND OF THE INVENTION
The conventional metal shears is generally composed of a toggle set, a cutting set and a pair of hand grips. The toggle set comprises a pair of toggles fastened pivotally with a locating bolt. The cutting set comprises a pair of jaws having a blade. The jaws are respectively pivoted at the lower segment thereof with the toggles. The hand grips are fastened with the lower ends of the toggles. As the toggles are actuated by the hand grips to move in opposite directions, two blades are thus caused to move accordingly to facilitate the cutting of a metal material, such as a screw, a metal wire, etc.
Such a prior art metal shears as described above is defective in design in that there is always a gap between two blades when the jaws 2176~18 -are moved to be closest together. The gap undermines the cutting effect of the prior art metal shears. In order to elimin~te the gap referred to above, the locating bolt is modified such that the locating bolt is provided with an eccentric portion which is received in the jaw. As a result, the gap between two blades can be minimi7ed by rotating the locating bolts to adjust the distance between the jaws. However, the gap still remains if two blades are not parallel to each other.
SUMMARY OF THE INVENTION
It is therefore the primary objective of the present invention to provide a metal shears, which comprises two blades that can be so adjusted as to be parallel to each other.
It is another objective of the present invention to provide an improved metal shears comprising two blades that can be so adjusted as to be parallel to each other.
It is another objective of the present invention to provide an improved metal shears comprising two blades which can be adjusted easily to form therebetween a desired angle to facilitate the cutting of a metal material.
The foregoing objectives of the present invention are attained by an improved metal shears, which comprises a toggle set, a cutting set, and a pair of grips. The toggle set is made up of a first toggle and a second toggle, which are respectively fastened pivotally by means of a 21 76~18 first pivoting member. The cutting set comprises a first jaw, a second jaw, and a pair of cover pieces. The first jaw and the second jaw have a blade which is pivoted to the cover piece by a locating bolt and is further pivoted to the corresponding toggle by means of a second pivoting member. The hand grips are fastened with the first and the second toggles. The first toggle is provided with an adjustment set for adjusting the distance between the first pivoting member and the second pivoting member so as to force the first jaw to swing to change the angle formed by the blades.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an exploded view of an embodiment of the present invention.
FIGS. 2-4 are schematic views illustrating in series the adjustment of the angles formed by the blades of the first and the second jaws of the embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
As shown in all drawings provided herewith, an improved metal shears 10 embodied in the present invention is composed of a toggle set 12, a cutting set 14, and a pair of grips 16.
2l764l8 The toggle set 12 comprises a first toggle 20 and a second toggle 30, which are provided respectively at the lower segments thereof with protuberances 22 and 32, and are fastened pivotally at the opposite sides of the upper segments thereof by means of a first pivoting member 121.
The cutting set 14 comprises a first jaw 40, a second jaw 50, and a pair of cover plates 60. The first and the second jaws 40 and 50 are provided respectively at the upper segments thereof with blades 42 and 52 opposite to each other. The first and the second jaws 40 and 50 are respectively pivoted at the midsegments thereof to the cover plates 60 by a pair of locating bolts 62, and at the lower segments thereof to the corresponding first and second toggles 20 and 30 by a pair of second pivoting members 141 similar in construction to a threaded rod. The second pivoting members 141 are kept apart from the first pivoting member 121 by an appropriate distance.
The grips 16 are fastened respectively with the lower ends of the first and the second toggles 20 and 30.
In operation, the first and the second toggles 20 and 30 are actuated by the grips 16 to swing on the axis of the first pivoting member 121 such that the first jaw 40 and the second jaw 50 are forced to swing respectively on the axes of the locating bolts 62 so as to execute the cutting of a metal wire or screw by moving the blades 42 and 52 apart or close together.
The metal shears 10 of the present invention is characterized in construction in that the first toggle 20 is provided at the upper segment thereof with a first support arm 24 and a second support arm 26, which 2176~18 are separated from each other by an empty portion 70. The first arm 24 is fastened pivotally at the upper end thereof with the first pivoting member 121 while the second support arm 26 is fastened pivotally at the upper end thereof with the second pivoting member 141 corresponding thereto. The empty portion 70 has a first threaded hole 72 coaxial with a through hole 74 of the second support arm 26. The empty portion 70 further has a second threaded hole 76 separated from the through hole 74 by an appropriate distance.
The first toggle 20 is further provided with an adjustment set 18, which comprises a first adjusting screw 80 having a small diametric end 801 engageable with the first threaded hole 72 via the through hole 76.
The first adjusting screw 80 further has a large diametric end 802 capable of urging one side of the second support arm 26. The adjustment set 18 further comprises a second adjusting screw 82 engageable with the second threaded hole 76 such that one end of the second adjusting screw 82 is located in the empty portion 70 and is capable of urging one side of the first support arm 24.
In operation, the small diametric end 801 of the first adjusting screw 80 is engaged with the first threaded hole 72 such that the large diametric end 802 is caused to urge the second support arm 26 to swing to one side. The second support arm 26 is forced to swing to another side by the second adjusting screw 82 which is kept in the state of urging the first support arm 24.
As illustrated in ~IG. 2, a V-shaped gap is formed between the blades 42 and 52 when the protuberances 22 and 32 of the first toggle 20 and the second toggle 30 are pressed against each other. In case of such 2~ 76~1~
-an incident as described above, the first adjusting screw 80 is first unfastened before the second adjusting screw 82 is turned to force the second support arm 26 to swing toward another side so as to cause an increase in distance between the first and the second pivoting members 121 and 141 which are pivoted with the first toggle 20. As a result, the first jaw 40 is actuated to swing such that the blade 42 is caused to swivel until the blade 42 is parallel to the blade 52 of the second jaw 50.
However, there may be still a gap located between the blades 42 and 52, as illustrated in FIG. 3. The gap can be elimin~ted by adjusting the locating bolts 62.
In case of an incident in which an inverted V-shaped gap (not shown in the drawings) is formed between the blades 42 and 52 when the protuberances 22 and 32 of the first and the second toggles 20 and 30 are pressed against each other, the second adjusting screw 82 is first unfastened before the first adjusting screw 80 is turned to force the second support arm 26 to swivel toward the first support arm 24 so as to bring about a decrease in distance between the first and the second pivoting members 121 and 141. As a result, the first jaw 40 is actuated to swing to elimin~te, in conjunction with the adjusting of the locating bolts 62, the inverted V-shaped gap located between the blades 42 and 52.
It must be pointed out here that the first and the second adjusting screws 80 and 82 have both adjusting function and locating function. For instance, when the first adjusting screw 80 is adjusted to actuate the second support arm 26 to swivel to locate at an appropriate position, the second adjusting screw 82 can be turned to urge the second support arm 26 in an opposite direction so as to prevent the first adjusting screw 80 2l 76~l8 from being unfastened or disengaged at the time when the metal shears 10 of the present invention is at work. In other words, the second adjusting screw 82 has the function of locating the first adjusting screw 80, and vice versa.
Claims (4)
1. A shears for cutting a metal material, said shears comprising;
a toggle set composed of a first toggle, a second toggle, and a first pivoting member for fastening pivotally said first toggle and said second toggle;
a cutting set composed of a first jaw, a second jaw, and a cover plate on which said first jaw and said second jaw are pivoted respectively at an interval by a locating bolt, said first jaw provided at an upper segment thereof with a blade, said second jaw provided at an upper segment thereof with a blade opposite in location to said blade of said first jaw, said first jaw being fastened pivotally at a lower segment thereof with said first toggle by a second pivoting member, said second jaw being fastened pivotally at a lower segment thereof with said second toggle by a second pivoting member; and a pair of grips fastened respectively with said first toggle and said second toggle;
wherein said first toggle is provided with an adjustment set fastened therewith such that said adjustment set is capable of adjusting a distance between said first pivoting member and said second pivoting member of said first jaw.
a toggle set composed of a first toggle, a second toggle, and a first pivoting member for fastening pivotally said first toggle and said second toggle;
a cutting set composed of a first jaw, a second jaw, and a cover plate on which said first jaw and said second jaw are pivoted respectively at an interval by a locating bolt, said first jaw provided at an upper segment thereof with a blade, said second jaw provided at an upper segment thereof with a blade opposite in location to said blade of said first jaw, said first jaw being fastened pivotally at a lower segment thereof with said first toggle by a second pivoting member, said second jaw being fastened pivotally at a lower segment thereof with said second toggle by a second pivoting member; and a pair of grips fastened respectively with said first toggle and said second toggle;
wherein said first toggle is provided with an adjustment set fastened therewith such that said adjustment set is capable of adjusting a distance between said first pivoting member and said second pivoting member of said first jaw.
2. A shears for cutting a metal material, said shears comprising:
a toggle set composed of a first toggle, a second toggle, and a first pivoting member for fastening pivotally said first toggle and said second toggle;
a cutting set composed of a first jaw, a second jaw, and a cover plate on which said first jaw and said second jaw are pivoted respectively at an interval by a locating bolt, said first jaw provided at an upper segment thereof with a blade, said second jaw provided at an upper segment thereof with a blade opposite in location to said blade of said first jaw, said first jaw being fastened pivotally at a lower segment thereof with said first toggle by a second pivoting member, said second jaw being fastened pivotally at a lower segment thereof with said second toggle by a second pivoting member; and a pair of grips fastened respectively with said first toggle and said second toggle;
wherein said first toggle is provided with a first support arm and a second support arm which are fastened therewith such that said first support arm is kept apart from said second support arm by a distance, and that said first support arm and said second support arm are pivoted respectively with said first pivoting member and said second pivoting member;
wherein said first toggle is provided with an adjustment set capable of adjusting a distance between said first support arm and said second support arm.
a toggle set composed of a first toggle, a second toggle, and a first pivoting member for fastening pivotally said first toggle and said second toggle;
a cutting set composed of a first jaw, a second jaw, and a cover plate on which said first jaw and said second jaw are pivoted respectively at an interval by a locating bolt, said first jaw provided at an upper segment thereof with a blade, said second jaw provided at an upper segment thereof with a blade opposite in location to said blade of said first jaw, said first jaw being fastened pivotally at a lower segment thereof with said first toggle by a second pivoting member, said second jaw being fastened pivotally at a lower segment thereof with said second toggle by a second pivoting member; and a pair of grips fastened respectively with said first toggle and said second toggle;
wherein said first toggle is provided with a first support arm and a second support arm which are fastened therewith such that said first support arm is kept apart from said second support arm by a distance, and that said first support arm and said second support arm are pivoted respectively with said first pivoting member and said second pivoting member;
wherein said first toggle is provided with an adjustment set capable of adjusting a distance between said first support arm and said second support arm.
3. The shears as defined in claim 1 or 2, wherein said adjustment set comprises a first adjusting screw and a second adjusting screw, with said first adjusting screw being capable of reducing a distance between said first pivoting member and said second pivoting member, and with said second adjusting screw being capable of increasing said distance between said first pivoting member and said secnd pivoting member.
4. The shears as defined in claim 2, wherein said first jaw has a first support arm and a second support arm, said first support arm provided with a through hole and a first threaded hole, said second support arm provided with a second threaded hole coaxial with said through hole; wherein said first adjusting screw is engaged with said second threaded hole via said through hole; and wherein said second adjusting screw is engaged with said first threaded hole such that said second support arm is urged by one end of said second adjusting screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002176418A CA2176418A1 (en) | 1996-05-13 | 1996-05-13 | Metal shears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002176418A CA2176418A1 (en) | 1996-05-13 | 1996-05-13 | Metal shears |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2176418A1 true CA2176418A1 (en) | 1997-11-14 |
Family
ID=4158186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002176418A Abandoned CA2176418A1 (en) | 1996-05-13 | 1996-05-13 | Metal shears |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2176418A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014176041A3 (en) * | 2013-04-25 | 2014-12-18 | Caterpillar Inc. | Adjustment mechanism for adjusting jaws of shear |
-
1996
- 1996-05-13 CA CA002176418A patent/CA2176418A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014176041A3 (en) * | 2013-04-25 | 2014-12-18 | Caterpillar Inc. | Adjustment mechanism for adjusting jaws of shear |
| US9518372B2 (en) | 2013-04-25 | 2016-12-13 | Caterpillar Inc. | Adjustment mechanism for adjusting jaws of shear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19990513 |