JPH08192315A - Cutter chain and cutting device - Google Patents

Abstract

PURPOSE: To provide a cutter chain, which is provided with excellent abrasion resistance and a long life and manufactured at low costs, and a cutting device using it. CONSTITUTION: A cutter chain C is provided with a plane plate chain body, in which multiple flaps 1 are connected together endlessly on the same plane, and cutting edges 12, each of which is respectively fixed in the end part of a chain outer circumference side in each of the flaps 1. On both sides of each flap 1, abrasion preventing parts 22A, 22B, which are made of material having better abrasion resistance than material for the flap 1, are projected from the flap side faces. The abrasion preventing members 22A, 22B are brought into contact with the inside wall face of a cutter fitting groove in a sprocket 52 so as to regulate a position of the cutter chain C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter chain used for cutting and dismantling hard substances such as stone materials, wood, vehicles or structures, and a cutting device using the cutter chain.

[0002]

2. Description of the Related Art The present inventor has previously filed Japanese Patent Application No. 1-322323.
No. 7, etc., proposed a cutter chain formed by connecting flat plate-like flaps and a cutting device. The cutter chain according to the above application is a chain body in which a large number of flat plate-shaped flaps are rotatably connected in the same plane, and an abrasive grain layer tip or the like fixed to each chain outer peripheral end of each flap. And a blade. A connecting projection that expands toward the tip is formed at one end of each flap, and a connecting cutout is formed at the other end where the connecting projection fits in, and another flap adjacent to the connecting projection is formed. The flaps are rotatably connected by being fitted into the connecting notches.

On the other hand, the cutting device according to the above application cuts a work material by winding the cutter chain around a pair of sprockets, rotating the cutter chain, and running the cutter chain. Cutter fitting grooves are formed on the outer periphery of the sprocket, and the inner peripheral side of the cutter chain is fitted into these cutter fitting grooves so that the cutter chain is supported perpendicularly to the sprocket axis.

[0004]

By the way, in the above-described cutter chain and cutting device, the inner wall surface of the cutter fitting groove and the side surface of the cutter chain rub strongly with each other as the sprocket rotates, and in particular, a hard and brittle material is used. When it is used for cutting, since cutting chips and fallen abrasive grains adhere to the cutter chain, it is inevitable that the side surface of the flap will wear as it is used. For this reason, the flap may be gradually thinned to cause rattling, or the connection strength may be reduced.

Further, when the cutter chain is used for cutting a hard and brittle material in particular, the chips of the work material and the falling abrasive grains generated from the cutting blade gradually abrade the flap end portion on the cutting blade side, So-called under-neck wear occurs on the part. Therefore, when the cutting blade is replaced and the flap is repeatedly used, there has been a problem that the life of the flap is short and limited. If the flap is made of a hard material, the above-mentioned problem of wear is alleviated, but in that case it becomes difficult to machine the flap connecting part and fix the cutting blade, and the manufacturing cost of the cutter chain is greatly increased. Therefore, improvement by such a method is difficult.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cutter chain having excellent wear resistance, long life, and low manufacturing cost, and a cutting device using the same. .

[0007]

In order to solve the above problems, a cutter chain according to the present invention comprises a flat plate-shaped chain body in which a large number of flat plate-shaped flaps are connected endlessly on the same plane, A cutting blade fixed to each end of each flap on the outer peripheral side of the chain, and each side surface of each flap is made of a material having higher wear resistance than the flap material. Or 2
It is characterized in that the above wear preventing portion is formed so as to project from the side surface of the flap.

The cutting device according to the present invention is a cutting device using the cutter chain, wherein a plurality of sprockets are wound around the outer circumference of the cutter chain, and the sprockets are rotated. A cutter drive mechanism for running the cutter chain by means of, and a cutting mechanism for moving at least one of the work material or the cutter chain to the other side along the cutter winding surface, A cutter fitting groove is formed on the outer peripheral surface, the chain inner peripheral side of the cutter chain is fitted into the cutter fitting groove, and the wear preventing portions come into contact with the inner wall surfaces of the cutter fitting groove, It is characterized in that the cutter chain is supported perpendicularly to the axis of the sprocket.

[0009]

In the cutter chain according to the present invention, since the wear preventing portions made of a material having excellent wear resistance are formed on both side surfaces of each flap so as to project from the side surface of the flap, the cutter chain is wound around the sprocket. In this state, the wear preventing portions come into contact with the inner wall surface of the cutter fitting groove of the sprocket to support the cutter chain. Since the wear prevention part is made of a material having excellent wear resistance, it hardly wears itself, and the side surface of the flap itself does not wear because it does not rub against the sprocket.
The service life of the chain can be significantly extended. On the other hand, the material of the flap does not have to be so hard, and the wear prevention portion may be a small member, so that the increase in the manufacturing cost of the cutter chain can be suppressed to a small extent despite the high life extending effect.

[0010]

【Example】

[First Embodiment of Cutter Chain] FIGS. 1 to 5 show a first embodiment of a cutter chain according to the present invention.
As shown in FIG. 1, this cutter chain C has a large number of plate-like flaps 1 having a constant thickness and the same shape, which are connected endlessly along the same plane. Each flap 1 has a substantially rectangular shape, and a T-shaped connecting convex portion 6 is formed at one end thereof, and a connecting concave portion 8 having a shape complementary to the connecting convex portion 6 is formed at the other end thereof. . Then, all the flaps 1 are rotatably connected to each other in the same plane by fitting the connecting projections 6 into the connecting recesses 8 of the other adjacent flaps 1.

The connecting convex portion 6 is composed of a neck portion 2 protruding from the approximate center of the one end of the flap 1 and a substantially semicircular enlarged portion 4 formed at the tip of the neck portion 2. As shown in, the neck portion 2 has a smaller wall thickness than the flap 1 and is formed at the center of the flap 1 in the thickness direction. On the other hand, the thickness of the enlarged portion 4 is made substantially equal to the thickness of the flap 1, and both side surfaces of the enlarged portion 4 are located on the same plane as both side surfaces of the flap 1. As shown in FIG. 3, a convex arcuate sliding surface 4A facing the neck portion 2 side is formed on the rear end side of the enlarged portion 4. On the other hand, the front end surface 4B of the enlarged portion 4 is a flat surface that is substantially perpendicular to the longitudinal direction of the cutter chain C.

As shown in FIG. 3, a pair of concave arc-shaped sliding surfaces 8C which are in surface contact with the convex arc-shaped sliding surface 4A when the connecting convex portion 6 is fitted into the connecting concave portion 8 as shown in FIG. An end surface 8A that restricts the rotation range of the neck portion 2 and an end surface 8B that restricts the rotation range of the front end surface 4B of the enlarged portion 4 are formed. Further, in the vicinity of the end face 8A, a notch step 9A and a disc-shaped recess 9B are formed on both side faces of the flap 1, respectively.
As shown in FIG. 1, both ends of a neck support plate 10 are fitted into these recesses 9B and fixed with screws 11. In this mounted state, the surfaces of the neck support plate 10 and the enlarged portion 4 are substantially flush with the side surface of the flap 1, and the neck support plate 10 regulates the position of the neck 2 so that the neck 2 is slidably sandwiched from both sides. ing.

The neck supporting plate 10 has a concave arcuate sliding surface 8C.
A concave arcuate sliding surface 10A forming the same arcuate surface is formed, and the convex arcuate sliding surface 4A of the connecting convex portion 6 makes surface contact with the concave arcuate sliding surface 10A of the neck support plate 10. It is slidable. Since the neck support plate 10 supports most of the tension applied to the cutter chain C, it is desirable that the neck support plate 10 be formed of a hard material having excellent wear resistance. Specifically, spring steel, SKS steel, etc. can be mentioned. . On the contrary,
The flap 1 may be made of a relatively soft material that is low in cost, such as SK material or tool steel for machine structure.

At both ends of the end face on the outer peripheral side of the chain of each flap 1, elongated rectangular parallelepiped abrasive grain layer chips (cutting blades) 1 are provided.
2 are fixed by brazing or the like, and further, a convex portion 20 that supports the rear abrasive grain layer chip 12 is formed. As the abrasive layer chip 12, diamond abrasive grains, C
A metal bond abrasive grain layer formed by compacting and sintering a BN abrasive grain or a well-known general abrasive grain together with a metal binder or hot pressing is generally used, but other abrasive grain layer chips, wood or Saw blade tips for cutting other types of work materials may be used.

The size of the abrasive layer chip 12 is such that the width in the flap thickness direction is slightly larger than the wall thickness of the flap 1 and the overall length in the cutter longitudinal direction is 15 to 3 of the connecting pitch of the flap 1.
5%, abrasive layer chip 12 fixed to the same flap 1
It is desirable that the amount of the gap between them is 10% or more of the connection pitch of the flaps 1. However, one abrasive grain layer chip 12 may be fixed to each flap 1.

On both sides of the flap 1 at positions close to the inner peripheral edge of the chain, first wear preventing portions 22A made of a material having higher wear resistance than the material of the flap 1 are fixed. The protrusion amount of the first wear prevention portion 22A from the flap side face is smaller than the protrusion amount of the abrasive grain layer tip 12 from the flap side face, and when the work material is cut by the abrasive grain layer tip 12, It is considered that the wear prevention portion 22A does not come into contact with the work material.

Similarly, at the positions on both sides of each flap 1 which are close to the abrasive grain layer tip 12, second wear preventing portions 22B made of a material having a higher wear resistance than the flap material are formed. The protrusion amount of the second wear prevention portion 22B from the flap side face is smaller than the protrusion amount of the abrasive layer chip 12 from the flap side face.

The materials of the first wear preventing portion 22A and the second wear preventing portion 22B may be the same or different. Specifically, materials such as cemented carbide, ceramics and stellite can be exemplified. In addition, the first wear prevention portion 22A and the second
The amount of protrusion of the wear preventing portion 22B from the side surface of the flap is preferably the same, but may be different as necessary.

The wear preventing portions 22A, 2 in this embodiment
2B have the same rectangular shape, and both are fitted into a shallow recess previously formed on the side surface of the flap 1 and brazed or bonded. Since the structure is fitted in the recess as described above, the wear preventing portions 22A and 22B do not fall off from the flap 1 even if an impact is applied when the sprocket 52 is contacted. However, it is also possible to form the concave portion on the side surface of the flap 1 and directly join the wear preventing portion to the flat surface.

The thickness of the wear preventing portions 22A and 22B is preferably as thin as possible within a range where required strength is obtained in order to reduce cost. Abrasion prevention unit 2 of this embodiment
2A and 22B are arranged at positions substantially equidistant from both the connecting convex portion 6 and the connecting concave portion 8, respectively, and between the abrasive layer chip 12 and the second wear preventing portion 22B, and between the chamfered portion 18 and the first abrasion preventing portion 22B. The wear preventing portion 22A is separated from each other. The amount of separation between them is determined by the wear prevention portions 22A and 22B.
It should be determined in consideration of the wear state of the flap 1 when the flap is not provided. The edges of the wear preventing portions 22A and 22B on the surface side are preferably chamfered so as not to scrape the sprocket 52.

On the rear side in the cutter rotation direction of the end surface of each flap 1 on the inner circumference side of the chain, a concave driving recess 14 is formed in the shape of a concave arc, while on the front side in the cutter rotation direction of the same end side.
A linear cutout 16 is formed. As a result, at the position where the cutter chain C is wound around each sprocket 52, which will be described later, the drive recess 14 is engaged with the individual pins P fixed in the cutter fitting groove 52A of the sprocket 52 as shown in FIG. The cutter chain C is prevented from idling with respect to the sprocket 52. On the other hand, the notch 16 plays a role of avoiding interference between the pin P and the flap 1 in the process of engaging and disengaging the pin P with the drive recess 14 due to the rotation of the cutter.

Further, between the driving recess 14 and the notch 16, chamfered portions 18 having chamfered edges on both side surfaces are formed.
Is formed to facilitate the entry of the cutter chain C into the cutter fitting groove 52A of the sprocket 52.

[Embodiment of Cutting Device] Next, FIGS. 6 and 7 are a front view and a sectional view taken along line VII-VII showing an embodiment of a cutting device using the cutter chain C. The upper, lower, left and right sides used in step 1 are based on FIG.
Reference numeral 23 is a pair of columns standing on the floor surface F, and guide rails 24 are vertically fixed to the front faces of these columns 23 as shown in FIG. 7. On the front surface of each guide rail 24, base plates 28 are arranged at the same height, and these base plates 28 are supported along the guide rails 24 so as to be able to move up and down.

A recess 26 extending in the vertical direction is formed on the front surface of the guide rail 24, and a screw shaft 30 is arranged vertically in the recess 26. Each base plate 28 is attached to a screw shaft 30 via a female screw member 32. A top plate 34 is horizontally laid on the upper ends of the columns 23, and the upper ends of the screw shafts 30 are paired with the pair of gear boxes 3 fixed on the top plates 34.
6 is connected. The gear boxes 36 are connected to each other via a horizontal rod 38, and are connected to a lift motor 40 fixed to the top plate 34. When the lifting motor 40 is operated, the screw shafts 30 rotate in the same direction, and the base plates 28 move up and down while maintaining the same height.

One end of each wire 42 is fixed to each base plate 28, and these wires 42 are extended upward to form a top plate 34.
A balance weight 46 is fixed to the lower end of the pulley 44, which is wound around a pulley 44 provided above. The balance weight 46 and the elevating part including the base plate 28 are balanced.

The shaft support 4 is provided on the front surface of the right base plate 28.
8 is arranged and a mounting groove formed on the back surface of the shaft support 48 has a horizontal guide portion 5 provided on the front surface of the base plate 28.
It is fitted to 0, can be displaced in the left-right direction along the guide portion 50, and can be fixed at an arbitrary position. As a result, the cutter chain C can be mounted between the sprockets 52 and the tension thereof can be adjusted.

The shaft support 48 has a rotating shaft 5 protruding forward.
4 is rotatably attached, and a sprocket 52 is vertically fixed to the rotary shaft 54. Sprocket 5
As shown in FIG. 2, a cutter fitting groove 52A perpendicular to the sprocket axis is formed on the outer peripheral surface of the cutter 2, and the cutter chain C is fitted therein. The depth of the cutter fitting groove 52A is set to be a depth that can accommodate even the inner peripheral side of the cutter chain C to a part of the second wear prevention portion 22B, and in a state where the cutter chain C is fitted in the cutter fitting groove 52A. The wear preventing portions 22A and 22B both come into contact with the inner wall surface of the cutter fitting groove 52A, so that the cutter chain C is supported perpendicularly to the axis of the sprocket 52. Further, a chamfered portion 52C is formed at the opening edge of the cutter fitting groove 52A. The inner wall surface of the cutter fitting groove 52A and the wear preventing portion 2
2A and 22B do not always have to be in contact with each other, and a slight gap may be left.

Further, in the cutter fitting groove 52A, as shown in FIG.
As shown in FIG. 5, a large number of pins P are arranged at equal intervals in the circumferential direction, and each pin P is a driving engagement portion 14 of the cutter chain C.
And the cutter chain C is prevented from idling.

A rotary shaft 56 is rotatably attached to the left base plate 28 at the same height as the rotary shaft 54, and a pulley 58 and a sprocket 52 are coaxially fixed to the rotary shaft 56. There is. Then, the cutter chain C is wound by being fitted in the cutter fitting grooves 52A of both sprockets 52. A drive motor (cutter drive mechanism) 60 is fixed to the left base plate 28, and a pulley 62 is fixed to the rotation shaft of the motor 60. A belt 64 is wound between the pulley 62 and the pulley 58, and the drive motor 60 is actuated to drive each sprocket 52.
Rotates, and the cutter chain C runs.

In order to support the work material, a pair of rails 66, 6 are provided on the floor surface F between the columns 23 in the front-rear direction.
8 are laid, a dolly 70 is placed on these, and rails 6
It is possible to run along 6,68. A horizontal work table 72 is fixed to the upper surface of the carriage 70.

In order to cut a work piece with the cutter chain C using the above cutting device, first, the elevating motor 40 is operated to raise each base plate 28 and the cutter chain C, and then the table 72 is placed. Position a work material such as a stone back and forth. If the tension of the cutter chain C is insufficient, the shaft support 48 is moved to the right to adjust the tension. When the adjustment is completed, operate the drive motor 60,
While the cutter chain C is running, the lifting motor 40 is operated to lower the cutter chain C at a desired cutting speed to cut the work material.

According to the cutter chain C and the cutting device S having the above-mentioned structure, the wear preventing portions 22A and 22B having excellent wear resistance are fixed to both side surfaces of each flap 1 in a protruding state. Wear prevention portion 22A,
22B contacts the inner wall surface of the cutter fitting groove 52A of the sprocket 52 to support the cutter chain C. Since the wear preventing portions 22A and 22B have excellent wear resistance, the wear preventing portions 22A and 22B rarely wear themselves and the side surfaces of the flap 1 itself do not wear, so that the service life of the chain body can be greatly extended. On the other hand, the material of the flap 1 does not need to be so hard, and the wear preventing portions 22A and 22B may be small members, so that it is possible to suppress the increase in the manufacturing cost of the cutter chain C for the life extension effect. Is.

Further, since the protrusion amount of the wear preventing portions 22A and 22B from the flap side surface is smaller than the protrusion amount of the abrasive grain layer tip 12 from the flap side surface, the wear preventing portions 22A and 22B are covered. Can make deep cuts in cutting materials.

The first wear preventing portion 2 on the inner circumference side of the chain
Since both 2A and the second wear preventing portion 22B on the outer peripheral side contact the inner wall surface of the cutter fitting groove 52A, the sprocket 5
2 can support the cutter chain C stably. At the same time, the second wear prevention portion 22B fixed near the abrasive grain layer tip 12 can reduce the wear near the cutting edge of the flap due to chips or fallen abrasive grains, which also extends the service life of the cutter chain. It is possible to
Further, even when the cutter chain C is deeply cut into the inside of the work material, even if the cutting edge of the abrasive grain layer tip 12 is unevenly worn and the cutting direction is biased, the first wear prevention portion 22A and the second wear prevention portion 22A The wear prevention portion 22B contacts the cut end surface of the work material and functions as a guide to regulate the traveling direction of the cutter chain C, so that the cut surface is less likely to bend or fall.

[Second Embodiment of Cutter Chain] Next,
8 and 9 are views showing a second embodiment of the cutter chain C. In these figures, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only the differences will be described below.

The first difference of the second embodiment is that the first wear prevention portion 90A and the second wear prevention portion 90B are disc-shaped. With the disc-shaped wear preventing portions 90A and 90B, the cutter chain C can smoothly enter and leave the cutter fitting groove 52A. The materials, fixing positions, etc. of the wear preventing portions 90A and 90B may be the same as in the above embodiment.

The second difference of the second embodiment is the connecting structure of the flaps 1. The connecting convex portion 86 of this embodiment
Is composed of a convex main body 82 and a pair of side plates 84 which are integrally formed with the flap 1. As shown in FIG. 9, the convex portion main body 82 has a neck portion 82 protruding from one end of the flap 1.
A and a substantially semicircular enlarged portion 82 integrally formed at the tip thereof
The protrusion main body 82 has a smaller thickness than the flap 1 and is formed at the center of the flap 1 in the thickness direction.
The side plate 84 has a substantially semicircular shape and is symmetrically fixed to both sides of the enlarged portion 82B by screws 83, and the total thickness of the two side plates 84 and the convex portion main body 82 is substantially equal to the thickness of the flap 1.

A pair of convex arcuate sliding surfaces 82C facing the neck portion 82A side are formed on the enlarged portion 82B, and side plates 84 are formed.
A convex arcuate sliding surface 84A facing the neck portion 82A side is formed on each of them. The convex arcuate sliding surface 84A has a larger radius of curvature than the convex arcuate sliding surface 82C, but the centers of curvature of these convex arcuate sliding surfaces 82C and 84A are all located at a point located forward in the extension direction of the neck portion 82A. It matches. Expansion section 8
The front end surface 82C of 2B and the front end surface 84B of the side plate 84 are flat surfaces that are substantially perpendicular to the longitudinal direction of the cutter chain C.

On the other hand, the connecting recess 88 has an enlarged portion 82B.
A pair of concave arcuate sliding surfaces 88C slidably in surface contact with the convex arcuate sliding surfaces 82C of the pair and a pair of slidable surface contact with convex arcuate sliding surfaces 84A of the side plate 84. And a concave arc-shaped sliding surface 88D are formed. Further, in the connecting concave portion 88, an end surface 88A that restricts the turning range of the neck portion 82A of the connecting convex portion 86, an end surface 88E that restricts the turning range of the front end surface 84B of the side plate 84, and the protruding portion main body 82 are provided. Front end face 82
An end face 88B that restricts the rotation range of C is formed.

In this embodiment as well, the same effects as those of the first embodiment can be obtained, and the wear preventing portion 90A,
Since 90B is circular, even if the work material or sprocket 52 and the wear preventing portions 90A and 90B interfere with each other, the attacking property against the work material or sprocket 52 is small, and the flatness of the cut surface of the work material is small. Aggravated or sprockets 5
2 is less likely to wear.

In addition, according to the flap connecting structure of this embodiment, not only the side surfaces of the neck portion 82A are restricted by the neck support plate 10, but the adjacent flaps 1 are also restricted by the side plates 84 in the thickness direction. Therefore, the flatness of the cutter chain C can be increased more than in the first embodiment. Therefore, it is possible to reduce the collision impact of the wear preventing portions 90A and 90B on the work material and the sprocket 52 due to the surface wobbling of the cutter chain C.
It is possible to reduce noise generation due to A and 90B.

[Third Embodiment of Cutter Chain] FIG. 10
FIG. 8 is a diagram showing a third embodiment in which the present invention is applied to a cutter chain C for cutting wood. This embodiment is characterized in that a saw blade segment 102 suitable for cutting wood or the like is used as a cutting blade, and one wear preventing portion 114 is provided on each side. The other structure is the same as that of the second embodiment.

A large number of saw blades are formed on one surface of the saw blade segment 102, and a semi-circular convex portion 104 is integrally formed on the other surface. The central angle of the arc of the convex portion 104 is 18
Greater than 0 °. On the other hand, a semi-circular cutout 100 is formed in the flap 1 at substantially the center of the outer peripheral side end of the chain so that the convex portion 104 fits in substantially without a gap. The inner peripheral surface of the convex portion 104 is on the front side in the chain traveling direction. A slit 108 extending toward the inner circumferential side of the chain is formed in the.

An engaging portion 106 which is elastically deformable toward the connecting convex portion 6 is formed between the slit 108 and the end surface of the flap 1 on the front side in the cutter traveling direction. Further, the slit 108 is formed with a circular hole 112 for relieving stress during elastic deformation and a square hole 110 for tool insertion. Then, by inserting the tip of the tool into the square hole 110 and prying the slit 108, the saw blade segment 102 can be attached and detached, and when the tool is pulled out, the saw blade segment 1
02 becomes non-detachable.

The wear preventing portion 114 has a disk shape and is fitted and joined to the shallow recesses formed on both side surfaces of the flap 1, and the surface thereof protrudes in a certain amount in parallel with the side surface of the flap. The fixed position of the wear preventing portion 114 is the connecting convex portion 86.
And the coupling recess 88, the cutter chain C is supported in the cutter fitting groove 52A via the wear preventing portions 114 on both side surfaces. In the third embodiment, the wear preventing portion is not provided in the vicinity of the cutting blade because hard chips and falling abrasive grains are not generated in cutting wood and there is little problem of under-neck wear in the vicinity of the cutting blade. Is.

The cutter chain C of the third embodiment as described above is attached to the cutting device S and used for cutting wood or the like by the same method as described above. Also in this case, since the side surface of the flap 1 itself does not rub against the sprocket 52 and does not wear, the service life of the chain body can be greatly extended. On the other hand, the material of the flap 1 does not have to be so hard, and the wear preventing portion 114 may be a small member. Therefore, it is possible to suppress the increase in the manufacturing cost of the cutter chain C for the life prolonging effect. .

The present invention is not limited to the above three embodiments, and various modifications can be made. For example, the wear prevention portion may be changed to a ring shape or a triangle shape. Further, it goes without saying that the connection structure of the flaps may be appropriately changed, and the type of the cutting blade is not limited to the abrasive layer chip and the saw blade chip. Further, by forming the wear preventing portion by an abrasive grain layer chip similar to the abrasive grain layer chip 12, it is possible to smooth the cut end surface of the work material.

Further, the structure of the cutting device itself may be changed as necessary. For example, between the sprockets 52,
By arranging a backup plate thinner than the abrasive layer tip 12 in the same plane as the cutter chain C and slidably engaging the lower end of this backup plate with the inner peripheral edge of the cutter chain C, The cutting pressure may be supported, or three or more sprockets 52 may be provided and the cutter chain C may be wound around them.

A plurality of cutter grooves 52A may be formed in each sprocket 52, and a cutter chain C may be wound around each of the cutter grooves 52A. With such a cutting device, it is possible to cut a plurality of surfaces by one cutting operation, and it is possible to significantly improve the work efficiency in the stone plate cutting operation.

[0050]

As described above, in the cutter chain and the cutting device according to the present invention, the wear preventing portions made of a material having excellent wear resistance are formed in a protruding state on both side surfaces of each flap. Therefore, when the cutter chain is wound around the sprocket, the wear preventing portions come into contact with the inner wall surface of the cutter fitting groove of the sprocket to support the cutter chain. Since the wear prevention part is made of a material with excellent wear resistance, it hardly wears itself, and since the side surface of the flap itself does not rub against the sprocket, it does not wear, greatly extending the service life of the chain body. it can. On the other hand, the material of the flap does not have to be so hard, and the wear preventing portion may be a small member,
The increase in the manufacturing cost of the cutter chain can be suppressed to a small level for the effect of extending the service life.

When the amount of protrusion of the wear preventing portion from the flap side surface is smaller than the amount of protrusion of the cutting blade from the flap side surface, it is possible to cut deeply into the work material beyond the wear preventing portion.

The wear preventing portion has a first wear preventing portion formed near the end of the flap on the inner circumferential side of the chain and a second wear preventing portion formed at a position close to the cutting blade of the flap. In the case where the sprocket is composed of the prevention part, by making both the first wear prevention part and the second wear prevention part abut on the inner wall surface of the sprocket, the sprocket can stably support the cutter chain, and also, Reduces wear near the cutting edge of the flap due to falling abrasive grains, etc.
From this point as well, the service life of the cutter chain can be extended. Furthermore, even if the cutting direction tends to be biased due to uneven wear of the cutting blade when the cutter chain is deeply cut into the inside of the work material, the wear prevention part contacts the cutting end surface of the work material and guides it. As it functions as the above, and regulates the traveling direction of the cutter chain, it also has an effect that the cut surface is less likely to bend or fall.

[Brief description of drawings]

FIG. 1 is a partial plan view showing a first embodiment of a cutter chain according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a plan view of a flap used in the first embodiment.

FIG. 4 is a view on arrow IV in FIG.

5 is a view on arrow V in FIG. 3. FIG.

FIG. 6 is a front view showing an embodiment of a cutting device according to the present invention.

7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a partial plan view showing a second embodiment of the cutter chain according to the present invention.

FIG. 9 is a plan view of a flap used in the second embodiment.

FIG. 10 is a partial plan view showing a third embodiment of the cutter chain according to the present invention.

[Explanation of symbols]

 C Cutter chain 1 Flap 6,86 Connection convex part 8,88 Connection concave part 12 Abrasive layer chip (cutting blade) 22A, 90A 1st wear prevention part 22B, 90B 2nd wear prevention part 40 Cutter lifting motor (cutting) 52 Sprocket 52A Cutter fitting groove 60 Cutter drive motor (Main part of cutter drive mechanism) 102 Saw blade segment (cutting blade) 114 Wear prevention part

Claims (7)

[Claims] 1. A flat plate-shaped chain body in which a large number of flat plate-shaped flaps are connected endlessly on the same plane, and a cutting blade fixed to each chain outer peripheral end of each flap. A cutter chain provided, wherein one or more wear preventing portions made of a material having a wear resistance higher than that of the flap material are formed on both side surfaces of each flap so as to project from the flap side surface. A cutter chain featuring. 2. The cutter chain according to claim 1, wherein the amount of protrusion of the wear preventing portion from the flap side face is smaller than the amount of protrusion of the cutting blade from the flap side face. 3. The material having excellent wear resistance is cemented carbide,
The cutter chain according to claim 1 or 2, which is made of one or more materials selected from ceramics and stellite. 4. A connecting projection is formed at one end of the flap and a connecting recess is formed at the other end, and the connecting projection is fitted in a connecting recess of another adjacent flap. By doing so, the respective flaps are rotatably connected to each other within the plane, and the cutter chain according to any one of claims 1 to 3. 5. The first wear prevention portion is formed near the end of the flap 1 on the inner circumferential side of the chain, and the wear prevention portion comprises:
The cutter chain according to any one of claims 1 to 4, comprising a second wear preventing portion formed at a position of the flap 1 close to the cutting blade. 6. A cutting device using the cutter chain according to any one of claims 1 to 5, wherein a plurality of sprockets around which the cutter chain is wound around the outer circumference thereof and the sprocket are provided. A cutter driving mechanism for running the cutter chain by rotating, and a cutting mechanism for moving at least one of the work material and the cutter chain to the other side along the cutter winding surface, A cutter fitting groove is formed on the outer peripheral surface of the sprocket, the chain inner peripheral side of the cutter chain is fitted in the cutter fitting groove, and each wear prevention portion contacts the inner wall surface of the cutter fitting groove. According to the above, the cutter chain is supported perpendicularly to the axis line of the sprocket. 7. A cutting device using the cutter chain according to claim 5, wherein a plurality of sprockets are wound around the outer circumference of the cutter chain, and the sprockets are rotated to rotate the sprockets. A cutter driving mechanism for running the cutter chain, and a cutting mechanism for moving at least one of the work material and the cutter chain to the other side along the cutter winding surface, and the outer peripheral surface of the sprocket. A cutter fitting groove is formed in the cutter fitting groove, and a chain inner peripheral side of the cutter chain is fitted in the cutter fitting groove, and the first and second wear preventing portions come into contact with inner wall surfaces of the cutter fitting groove, respectively. Accordingly, the cutter chain is supported perpendicularly to the axis of the sprocket. .