Claims
- 1. A cutting apparatus for cutting a workpiece, comprising:
- a) a flexible endless chain body having inner and outer edges, comprising a plurality of generally planar flaps, each of the flaps having first and second opposite ends, the first end of each flap forming a connecting protrusion having a semi-circular shape and including a first pair of peripheral surfaces having semi-circular shapes, the second end of each flap forming a connecting recess having a second pair of peripheral surfaces having shapes matching the shapes of the first pair of peripheral surfaces of the flap, wherein the connecting protrusion of each one of the flaps is fitted into the connecting recess of an adjacent flap with the first pair of peripheral surfaces of the one of the flaps abutted against the second pair of peripheral surfaces of the adjacent flap, the connecting protrusions and the connecting recesses of the flaps connecting the plurality of the flaps together for angular movement in a common plane, each of the flaps having an outside edge on the outer edge of the chain body, and each of at least selected ones of the plurality of the flaps having a cutting device located at the outside edge of the flap;
- b) a plurality of sprockets supporting the chain body for movement on an endless path extending around a given area and in said common plane;
- c) a rigid backplate provided within the common plane and in said given area, at least one end of the backplate engaging with the inner edge of the chain body and preventing disengagement of the chain body and the backplate in a direction perpendicular to the common plane, and the backplate supporting the chain body towards the workpiece; wherein the flaps have a given thickness, and the backplate has a thickness not greater than said given thickness;
- d) a rotating means for rotating at least one of the sprockets and driving the chain body around the endless path; and
- e) a moving means for moving the workpiece or the chain body toward each other to cut the workpiece with the chain body.
- 2. The cutting apparatus according to claim 1, wherein an outer periphery of each sprocket contains a support means for maintaining said chain body in said common plane.
- 3. The cutting apparatus according to claim 2, wherein a plurality of pairs of said support means are provided perpendicularly along the axis of the sprockets at preselected distances.
- 4. The cutting apparatus according to claim 1, wherein:
- the cutting devices include abrasive bits having a given thickness; and
- surfaces of a rear region of the backplate are equipped with at least a pair of protrusions spaced apart a distance greater than the given thickness of the abrasive bits.
- 5. The cutting apparatus according to claim 1, wherein the backplate is provided with an elongated means to adjust a longitudinal tension of said backplate.
- 6. The cutting apparatus according to claim 1, further comprising a tilting means to independently tilt said chain body relative to the workpiece, to vary a relative angle between the workpiece and the chain body within the common plane.
- 7. The cutting apparatus according to claim 1, wherein each of the flaps is formed by bonding together three plate elements.
- 8. The cutting apparatus according to claim 1, wherein each of said cutting device is an abrasive cutting bit.
- 9. The cutting apparatus according to claim 1, wherein each of said cutting device is a saw tooth.
- 10. The chain cutter according to claim 1, wherein each of said cutting devices is securely and detachably mounted to a respective one corresponding flap.
- 11. The cutting apparatus according to claim 1, wherein the relative position of the backplate with respect to the chain body is adjustable through a positioning device.
- 12. The cutting apparatus according to claim 1, wherein:
- each flap has an inside edge on the inner edge of the chain body;
- each flap has a pair of driving recesses at first and second opposite ends of the inside edge of the flap, the driving recesses of each pair of adjacent flaps forming engage means, the engage means of the chain body being arranged at equal intervals when the chain body is bent in an arc; and
- said at least one of the sprockets has a plurality of driving protrusions provided at equal intervals in a circumferential direction on a periphery of said one of the sprockets, and each driving protrusion engages with corresponding engage means of the chain body to drive the chain body around said endless path.
- 13. The cutting apparatus according to claim 1, wherein the chain body further includes releasable connecting means, mounted on and connecting selected ones of the flaps to adjacent flaps.
- 14. The cutting apparatus according to claim 1, wherein:
- the first end of each flap has a first engaging means, and the second end of each flap has a second engaging means; and
- in linearly elongated portions of the chain body, the first engaging means of each flap engages with the second engaging means of a flap adjacent to said each flap to prevent disengagement of the flaps in said elongated portions of the chain body in the direction perpendicular to the common plane.
- 15. A cutting apparatus according to claim 1, wherein:
- the connecting protrusion of each flap has a pair of first engaging portions on the first pair of peripheral surfaces thereof, the first engaging portions being elongated in a circumferential direction of the first pair of peripheral surfaces;
- the connecting recess of each flap has a pair of second engaging portions on the second pair of peripheral surfaces thereof, the second engaging portions being elongated in a circumferential direction of the second pair of peripheral surfaces on the connecting recess; and
- a first of the engaging portions of the connecting protrusion of each flap fits with a corresponding second engaging portion of the connecting recess of an adjacent flap to prevent disengagement of the flaps from each other in a direction perpendicular to the common plane.
- 16. A cutting apparatus according to claim 15, wherein:
- the first engaging portion of the connecting protrusion of each flap disengages from the corresponding second engaging portion of the adjacent flap when a connecting length of said each flap and said adjacent flap is shortened, and said each flap and said adjacent flap become detachable from each other in a direction perpendicular to the common plane.
- 17. A cutting apparatus according to claim 1, wherein:
- the first and second pair of peripheral surfaces of the connecting protrusions and the connecting recesses are perpendicular to the common plane;
- the first end of the each flap has a first engaging means, and the second end of each flap has a second engaging means; and
- the first engaging means of each flap engages the second engaging means of an adjacent flap connected to said each flap, in linearly elongated portions of the chain body, to prevent disengagement of the flaps of the elongated portions from each other in a direction perpendicular to the common plane.
- 18. A cutting apparatus for cutting a workpiece, comprising:
- a) a flexible endless chain body having inner and outer edges, and comprising a plurality of generally planar flaps, each of the flaps having first and second opposite ends, the first end of each flap forming a first connecting portion, the second end of each flap forming a second connecting portion, the first connecting portion of each flap being connected with the second connecting portion of an adjacent flap to connect said each flap thereto, the first and second connecting portions of the flaps connecting the plurality of flaps together for angular movement in a common plane, each of the flaps having an outside edge on the outer edge of the chain body, each of at least selected ones of the plurality of the flaps having a cutting device located at the outside edge of the flap, and each flap having an inner area forming a driving throughhole;
- b) a plurality of supporting sprockets supporting the chain body for movement on an endless path extending around a given area and in said common plane;
- c) at least one driving sprocket provided alongside the chain body, comprising a plurality of driving protrusions provided at equal intervals in a circumferential direction on a periphery of the driving sprocket, the driving protrusions engaging the driving throughholes of the flaps of the chain body to drive the chain body around said endless path;
- wherein as the flexible chain moves around said endless path, the chain includes first and second sections, each of said sections including a plurality of the flaps, and wherein the driving throughholes of the flaps in said first and second sections are spaced apart at regular intervals;
- d) a rigid backplate provided within the common plane and in said given area, at least one end of the backplate engaging with the inner edge of the chain body and preventing disengagement of the chain body and the backplate in a direction perpendicular to the common plane, and the backplate supporting the chain body towards the workpiece; wherein the flaps have a given thickness, and the backplate has a thickness not greater than said given thickness;
- e) a rotating means for rotating the driving sprocket; and
- f) a moving means for moving the workpiece or the chain body toward each other to cut the workpiece with the chain body;
- wherein said driving sprocket includes an outer peripheral surface facing toward the inner edge of the chain body, and defines an axis extending parallel to said common plane.
- 19. A cutting apparatus for cutting a workpiece, comprising:
- a) a flexible endless chain body having inner and outer edges, and comprising a plurality of generally planar flaps, each of the flaps having first and second opposite ends, the first end of each flap forming a first connecting portion, the second end of each flap forming a second connecting portion, the first connecting portion of each flap being connected with the second connecting portion of an adjacent flap to connect said each flap thereto, the first and second connecting portions of the flaps connecting the plurality of flaps together for angular movement in a common plane, each of the flaps having an outside edge on the outer edge of the chain body, each of at least selected ones of the plurality of the flaps having a cutting device located at the outside edge of the flap, each of the cutting devices including a mounting projection, the outside edge of each of the selected ones of the flaps forming a mounting recess receiving the mounting projection of the cutting device connected to said each of the selected ones of the flaps, each of the mounting recesses including an elastically movable section to selectively engage and release the mounting projection received in said each mounting recess;
- b) a plurality of sprockets supporting the chain body for movement on an endless path extending around a given area and in said common plane;
- c) a rigid backplate provided within the common plane and in said given area, at least one end of the backplate engaging with the inner edge of the chain body and preventing disengagement of the chain body and the backplate in a direction perpendicular to the common plane, and the backplate supporting the chain body toward the workpiece; wherein the flaps have a given thickness, and the backplate has a thickness not greater than said given thickness;
- d) a rotating means for rotating at least one of the sprockets and driving the chain body around the endless path; and
- e) a moving means for moving the workpiece or the chain body toward each other to cut the workpiece with the chain body.
- 20. A cutting apparatus for cutting a workpiece, comprising:
- a) a flexible endless chain body having inner and outer edges, and comprising a plurality of generally planar flaps arranged in a common plane, each of the flaps having first and second opposite ends and an outside edge on the outer edge of the chain body, the first end of each flap forming a connecting protrusion having a disk shape having a center axis and a peripheral surface perpendicular to the common plane, the second end of each flap forming a connecting recess having an inner peripheral surface having a shape complementary with the shape of the connecting protrusion of the flap, and the connecting protrusion of each one of the flaps being fitted into the connecting recess of an adjacent flap, the connecting protrusions and the connecting recesses connecting the plurality of flaps together for angular movement in said common plane;
- b) a plurality of cutting devices located at the outside edges of at least selected ones of the plurality of the flaps;
- c) a plurality of sprockets supporting the chain body for movement on an endless path extending around a given area in said common plane;
- d) a rigid backplate provided within the common plane and in said given area, at least one end of the backplate engaging with the inner edge of the chain body and preventing disengagement of the chain body and the backplate in a direction perpendicular to the common plane, and the backplate supporting the chain body towards the workpiece; wherein the flaps have a given thickness, and the backplate has a thickness not greater than said given thickness;
- e) a rotating means for rotating the sprockets and driving the chain body around the endless path; and
- f) a moving means for moving the workpiece or the chain body toward each other to cut the workpiece with the chain body;
- wherein as the flexible chain body moves around said endless path, the chain body includes linearly elongated portions, each of said linearly elongated portions including a plurality of the flaps, and the outside edges of the flaps in each of the linearly elongated portions defining a straight line;
- wherein the first end of each flap has a first engaging means between the outside edge of the flap and the connecting protrusion thereof, and the second end of each flap has a second engaging means between the outside edge of the flap and the connecting recess thereof; and the first engaging means of each flap in said linearly elongated portions of the chain body engages the second engaging means of an adjacent flap to prevent disengagement of the flaps in said linearly elongated portions from each other in a direction perpendicular to the common plane and to prevent pivotal movement of said each flap and said adjacent flap around the center axis of the connecting protrusion of said adjacent flap in an outward direction beyond the straight line defined by the outside edges of the flaps; and
- wherein the first engaging means of each flap disengages from the second engaging means of an adjacent flap when a portion of the chain body including said each and said adjacent flaps is bent inwardly to a predetermined radius of curvature and said each and said adjacent flaps become detachable from each other in the direction perpendicular to the common plane.
- 21. A cutting apparatus for cutting a workpiece, comprising:
- a) a flexible endless chain body having inner and outer edges, and comprising a plurality of generally planar flaps, each of the flaps consisting of a center plate having first and second sides and first and second side plates bonded, respectively, to the first and second sides of the center plate, each of the flaps having first and second opposite ends, the first end of each flap forming a connecting protrusion having at least a first engaging portion formed by a peripheral surface of the center plate of the flap, the second end of each flap forming a connecting recess having a shape complementary with the shape of the connecting protrusion of the flap, the connecting recess of each flap including at least a second engaging portion formed by an inner peripheral surface of the center plate of the flap, and the connecting protrusion of each one of the flaps fitting into the connecting recess of an adjacent flap with the first engaging portion of said each flap engaged with the second engaging portion of said adjacent flap, the connecting protrusions and the connecting recesses of the flaps connecting the plurality of flaps together for angular movement in a common plane while preventing disengagement of the flaps from each other in a direction perpendicular to the common plane, and each flap having an outer edge on the outer edge of the chain body;
- b) a plurality of cutting devices located at the outer edges of at least selected ones of the plurality of flaps;
- c) a plurality of sprockets supporting the chain body for movement on an endless path extending around a given area in said common plane;
- d) a rigid backplate provided within the common plane and in said given area, at least one end of the backplate engaging with the inner edge of the chain body and preventing disengagement of the chain body and the backplate in a direction perpendicular to the common plane, and the backplate supporting the chain body towards the workpiece; wherein the flaps have a given thickness, and the backplate has a thickness not greater than said given thickness;
- e) a rotating means for rotating the sprockets and driving the chain body around the endless path; and
- f) a moving means for moving the workpiece or the chain body toward each other to cut the workpiece with the chain body.
Priority Claims (5)
Number |
Date |
Country |
Kind |
1-247674 |
Sep 1989 |
JPX |
|
1-276893 |
Oct 1989 |
JPX |
|
1-298835 |
Nov 1989 |
JPX |
|
1-322237 |
Dec 1989 |
JPX |
|
2-122562 |
May 1990 |
JPX |
|
Parent Case Info
This is a continuation of copending application Ser. No. 586,958 filed on Sep. 24, 1990, now abandoned.
US Referenced Citations (23)
Foreign Referenced Citations (4)
Number |
Date |
Country |
505203 |
Dec 1952 |
BEX |
518164 |
Feb 1955 |
BEX |
3416712 |
Nov 1985 |
DEX |
595055 |
Sep 1925 |
FRX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
586958 |
Sep 1990 |
|