JPH03161215A - Flat plate chain body and its driving structure - Google Patents

Abstract

PURPOSE:To secure sufficient sliding area even for a flat plate flap of relatively small thickness, and to obtain high linking intensity and tensile strength by fitting a projected part for linking that is formed of the same thickness as that of the flap, and a notch for linking, to one another, so as to link the respective flaps together. CONSTITUTION:A notch 10 for linking of the same thickness as that of a flap, and a projected part 8 for linking are formed on the front and rear ends of each flap 1, respectively, and these are fitted to one another, and are thus linked together. Even when the thickness of the flap 1 is small, sliding area of the linked part is secured wide, and sufficient linking intensity and tensile strength are obtained thereby. Each flap 1 is supported in a direction of its thickness, on both side walls of a slit, in a winding part to a sprocket 88, while the end part of a back plate is fitted to a sliding groove 42 for the back plate of each flap 1, or to a sliding projection, on a linear part between each sprocket 88, whereby each flap 1 is regulated in a direction of thickness, so as not to release the flap 1 from linking.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a flat chain body used, for example, as a base of a cutting tool, a power transmission chain, or the like.

"Prior Art" The above-mentioned cutting tool will be described as an application example of the present invention.

When cutting large-sized cut materials such as stone, conventionally,
Cutting blades, band saws, wire saws, etc. are used.

The cutting blade has diamond abrasive layer chips fixed at equal intervals around the outer circumference of a disc-shaped base metal, and as the diameter increases, the thickness of the alloy inevitably increases due to strength requirements. , the thickness of the abrasive layer chip also increases accordingly. For this reason, the cutting allowance becomes large, which deteriorates the yield of the cut material, and the cutting resistance increases, causing run-out of the cutting edge, resulting in a reduction in cutting accuracy.

In addition, a band saw is a wide band-shaped metal R temporary with a thickness of about 1 to 6 RR, which is welded endlessly, and low-grain layer chips are fixed to one side edge at equal intervals, and are arranged on the same horizontal plane. It is wound between a pair of pulleys that rotate at high speed, and the straight line between these pulleys cuts stones, etc. However, band saws have the drawback that repeated stress acts on the curved portions wound around the boule, which causes metal fatigue in the base metal as it is used, resulting in a short lifespan before breakage.

In addition, a wire saw is an endless type made by coaxially fixing cylindrical diamond abrasive layer tips at equal intervals to a stranded wire with a diameter of several zx-10xIN.
It is wound directly around the workpiece, and the drive unit applies a constant tension to the workpiece at high speed to cut the workpiece. However, because the diameter of the abrasive layer tip used is large, the cutting allowance is large compared to a cutting blade or a band saw, and there is no function to regulate the cutting direction due to the construction, so the flatness of the cut surface and the surface Less rough. Furthermore, during cutting, a large supporting stress is applied to the wire at both ends of the abrasive layer chip, which has the disadvantage of a short life span leading to chip breakage or wire breakage.

Therefore, the present inventors constructed an endless chain body by connecting a large number of flat metal flaps so as to be rotatable within the same plane as the flaps, as a completely new cutting tool that can solve each of the above problems. We are currently investigating a chain cutter in which a cutting blade is fixed to the outer peripheral end face of at least a portion of these flaps.

``Problems to be Solved by the Invention'' However, a particular problem in manufacturing such chain-forced vines is the connecting structure of each flap. In a structure in which the flaps are rotatably connected, it is difficult to ensure sufficient connection strength because the wall thickness of the flap is small. Also,
In this type of chain body, wear of the flap connecting part is unavoidable, but if the flap is connected with a pin etc. as described above, it is difficult to replace the worn flap, and it is important to solve each of these drawbacks in the development of the chain cutter. This was a major issue.

"Means for Solving the Problems" The present invention has been made to solve the above problems.Firstly, the flat chain body of the present invention has a flat plate-shaped chain body having a front end of a flat flap with an outer circumferential surface perpendicular to the flap surface. A disk-shaped connecting convex portion is formed flush with the rear end of the flap, and an arc-shaped inner circumferential surface is perpendicular to the flap surface and has a slightly larger diameter than the connecting convex portion. The connecting notch is formed flush, and the connecting convex part of each flap is rotatably fitted into the connecting notch of the adjacent flap. , a sliding groove or a sliding protrusion for the back plate extending parallel to a line connecting the centers of the connecting notch and the connecting convex portion is formed.

In addition, on either the left or right end of the front end face and the rear end of the flap, there are formed engaging parts that engage with each other irremovably in the thickness direction of the flap while the chain body extends linearly. The flaps may be connected in an endless manner.

Further, a cutting blade may be fixed to at least a portion of the flap at an end portion opposite to the back plate sliding groove or sliding protrusion.

Furthermore, the flap may be formed by joining three layers of plate materials, and the size of the central plate may be different from the other two to form the sliding groove or sliding protrusion for the back plate.

On the other hand, in the drive structure of the flat chain body of the present invention, one end in the width direction of the flat chain body is fitted into at least a pair of sprockets having a slit formed on the outer peripheral surface thereof, which is fitted perpendicularly to the axis. A flat chain body is wound along the flat chain body, and one end edge is slidably fitted into a sliding groove or a sliding protrusion for the back plate of each flap in the linearly extending portion of the flat chain body. It is characterized by providing a plate and further providing a drive mechanism for rotating the flat chain body and each sprocket.

"Function" In this flat chain body and its drive structure,
A connecting notch and a connecting convex part of the same thickness as the flap are formed at the front and rear ends of each flap, and these are connected by fitting, so even if the flap wall thickness is small, the sliding area of the connecting part is It is possible to secure a wide range of strength and obtain sufficient connection strength and tensile strength.

In addition, in the part where it is wound around the sprocket, each flap is supported in the thickness direction by both side walls of the slit, and in the straight part between the sprockets, the end of the back plate is connected to the sliding groove for the back plate of each flap or the sliding part. By fitting into the protrusion and restricting each flap in the thickness direction so that the flaps do not become disconnected, the circumferential surfaces of the connecting notch and the connecting convex part are made into simple cylindrical surfaces. Therefore, each flap can be easily separated when disengaged from the back plate or sprocket, making replacement of worn flaps extremely easy and quick.

For the same reason, these connecting notches and connecting convex portions can be formed with high precision using a relatively simple processing method, resulting in low processing costs.

Embodiment FIGS. 1 and 2 are a partial front view and a sectional view taken along the line ■-■ showing a peripheral blade type chain cutter as a first embodiment of a flat chain body and its drive structure according to the present invention. It is.

This peripheral blade type chain cutter has an endless chain body 2 by connecting a large number of rectangular metal flaps I with a constant thickness such that they can rotate only within the same plane as the flaps L, and each Abrasive grain segments (cutting blades) 4 are fixed to the outer end faces of the flaps 1, respectively, and driven recesses 6A and 6B are formed on the inner periphery of each flap I.

Flap l is SKa, stainless steel, SKD steel, SU
It is molded from Pli, SNCM steel, etc., and has a hardness of HRc 30 to 65 due to hardening treatment. HRc
If the HRc is less than 30, sufficient strength cannot be obtained, and if the HRc is greater than 65, molding becomes difficult.

The dimensions of the flap l vary depending on the use of the chain cutter, but for example, for normal large stone cutting, the wall thickness is 2.
~60cm, height H is around 50~150mm, width W is 40cm
~10 (lyi).

With dimensions within this range, sufficient tensile strength and cutting performance can be obtained as a large stone cutter. Further, the inner peripheral end face and the outer peripheral end face of the flap l are parallel to each other.

Next, the connection structure of the flap l will be explained.

As shown in FIG. 3, each flap l is integrally formed with a disc-shaped connecting convex 8 flush with the surface of the flap l at the center of the side surface on the forward side in the rotational direction. A connecting notch lO having a slightly larger diameter than the connecting convex portion 8 and having an arc shape is formed on the rear side surface. A line connecting the center Ol of the connecting convex portion 8 and the center 02 of the connecting notch IO is set parallel to the outer circumferential side end surface and the inner circumferential side end surface of the flap l.

As shown in FIG. 3, both edges of the constricted portion 8A of the connecting convex portion 8 are formed into an arc shape to prevent stress concentration. Also, both sides of the opening of the connecting notch lO + OA are in an arcuate shape having a radius of curvature smaller than the constricted portion 8A. It is double-sided.

Connection notch! The central angle β between both ends of O is 60 to 15
0', preferably 90-1201. If it is larger than 150', the locking force of the connecting protrusion 8 by the connecting notch 10 is small, and the connection strength is reduced. Moreover, if the width is smaller than 60'', the width of the constriction portion 8A of the connecting convex portion 8 becomes small, and the tensile strength at this portion decreases.

On the other hand, the central angle α between the constricted surfaces of the connecting convex portion 8 is such that the connecting convex portion 8 can rotate within the connecting notch lO.
It is formed to be a certain angle smaller than the central angle β. Also,
The distance L2 from the center 02 of the connecting notch 10 to the extension line of the side surface of the flap is smaller than the distance L1 from the center 01 of the connecting convex portion to the flap ffllll surface.

On the other hand, in the center of the connection notch 10, a lifespan determination J416 having a shallow U-shaped cross section is formed perpendicular to the flap l. Further, the distance from the center 02 of the connecting notch 10 to the bottom surface of the life determination 116 is set to be slightly larger than the maximum radius of the connecting convex S.

As a result, in the flap connected state, the life judgment groove l
There is a slight gap between 6 and the outer circumference of the connecting convex 8,
By measuring the amount of this gap with a gap gauge or the like, it is possible to determine the amount of wear on the connecting portion, and it can be used as a guide to the lifespan of the flap.

Next, the fixing structure of the grinding wheel segment 4 will be explained.

At the end of each flap l on the outer circumferential side of the chain, there is a direction forward in the rotational direction from the center of the end. An arcuate segment mounting recess l8 is formed at the lopsided position. The inner circumferential surface of this segment attachment recess l8 has a concave V-shaped cross section over its entire length, and the central angle γ between both ends of the attachment recess 18 is 90 to 170'', preferably 120 to 160''. If it is smaller than 90 degrees, it will be difficult to attach and remove the abrasive grain segment 4, and if it is larger than 170", the abrasive grain segment 4
There is a risk that the material may fall off.

Further, a jig insertion groove 20 having a small semicircular cross section is vertically formed on the outer peripheral end surface of the flap l at a position rearward in the rotation direction from the segment mounting groove 18. The radius A2 of this jig insertion groove 20 is larger than the distance HAI from the center of the mounting groove 18 to the inner circumferential end surface of the flap 1.

If it is smaller than that, it becomes impossible to remove the abrasive segment 4 using the attachment/detachment jig 32 described later. Note that the position of the jig insertion groove 20 may be changed to the bottom of the mounting recess l8 as shown in FIG. 3(A).

In addition, one end of the mounting concave lB is attached to the mounting concave lB.
A thin slit 22 that opens at the front side in the rotational direction is formed toward the inner peripheral side, and a circular hole 24 for stress relaxation is formed at the end of the slit 22 . The elongated portion separated by the slit 22 is an elastic locking piece 26, which is bent so that the abrasive grain segment 4 can be attached or detached by bending it toward the front in the rotational direction.

On the other hand, the abrasive grain segment 4 is composed of a chip support 28 made of metal and having the same thickness as the flap 1, and a rectangular parallelepiped-shaped abrasive layer chip 30 fixed to the end surface of the chip support 28.

The thickness of the abrasive layer chip 30 is 0.0 mm thicker than that of the chip support 28.
If the thickness is set to 5 to 4R11, and if it is smaller than 0.5+yx, there is a risk that the chip support 28 and flap 1 will rub against the cut surface of the cut material, and if it is larger than 4JIjl, the cutting allowance will become large and the yield will drop more than necessary. do. Further, the length of the abrasive layer chip 30 is equal to that of the chip support 28, and is slightly shorter than the outer circumference of the flap l, which is about 20 to 70 mx.

The abrasive grain layer chip 30 is a metal bond abrasive grain layer containing super abrasive grains such as diamond or CBN, and the chip support 2
8 by brazing, integral sintering, laser welding, electron beam welding, or the like. In addition, the particle size of the abrasive grains,
The degree of concentration and thickness should be determined depending on the use of the peripheral chain cutter.

The chip support 28 is integrally formed with the mounting recess 18 and a semicircular convex portion 28A having an Aura shape, and has a convex V-shaped cross section. The convex portion 28A can be inserted into the segment mounting recess 18 with the elastic locking piece 26 expanded, and is firmly locked when the elastic locking piece 26 is returned.

6 and 7 show the attachment/detachment jig 32, which has a T-shape consisting of a handle 34 and a shaft 36. The tip end 36A of d136 has a semicircular cross section with the same dimensions as the jig insertion N20. Then, by inserting this tip 36A into the jig insertion 120 and rotating the handle 34 by 90°, the abrasive segment 4 is removed against the locking force of the elastic locking piece 26.

Next, the vibration prevention structure of each flap will be explained. Each flap! Both sides are connection notches! 0 and the connecting groove 8 are parallel to each other on the outer circumferential side, and an engagement groove 38 having a V-shaped cross section and extending in the longitudinal direction of this side surface is formed on the front side surface in the rotational direction.

Further, on the inner peripheral side of the side surface on the rear side in the direction of rotation of the flap l, an engaging protrusion 4 having a cross-sectional shape similar to that of the engaging groove 38 is provided.
0 are formed along the sides.

When the flaps 1 are lined up in a straight line, the engagement grooves 38 and the engagement ridges 40 of the adjacent flaps 1 are set so that they fit together without any gaps so that the flaps 1 cannot move in the thickness direction. There is.

Next, the driven grooves 6A and 6B will be explained.

These driven concave grooves 6A, 6B are circular arc shaped concave grooves formed at the front and rear sides in the rotational direction on the inner circumferential side of each flap l, and both have a center angle of 90°.
It is said to be about .

The radius of curvature of the drive recesses 6A and 6B is as shown in FIG.
The radius is equal to the radius of the bottle 126 fixed to the outer periphery of the flap 1, and the portion from the driven grooves 6A, 6B to the inner periphery (7) of the flap 1 is formed into a smooth curved surface.

In addition, driven recesses 6A and 6B in the same flap l
The distance between the centers of curvature is equal to the distance between the centers of the pins 126, and when the flap l is wound around the outer circumference of the sprocket 88''l2, the driving recess 6 of the adjacent flap 1
A and 6B constitute the same arcuate surface, and are set so that the bottle +26 fits into this arcuate surface without wobbling.

Next, the back plate sliding groove, which will be described later, will be explained. A sliding groove 42 having a U-shaped cross section is formed along the center line of the inner circumferential end of each flap l over the entire length of the end surface. The bottom of this sliding groove 42 is a connection notch! O
It is parallel to a line connecting the center of the connecting convex portion 8 and the center of the connecting convex portion 8. The width of the sliding groove 42 is 30 to 30 mm thick of the flap due to its strength.
Approximately 50% is desirable. In addition, the depth of the sliding groove 42 should be set so that the locking force in the thickness direction of the flap l by the back play 118 is sufficiently large, specifically about 50 to 200% of the flap thickness. is suitable.

Next, a cutting device using a peripheral blade type chain force vine constructed as described above will be explained with reference to FIGS. 8 and 9.

FIG. 8 is a front view of the device, and FIG. 9 is a partially cutaway plan view, and the upper, lower, right, and left directions used in the following description are based on FIG. 8.

Reference numeral 50 in the figure indicates a pair of cylinders erected at intervals on the floor surface, and each of these cylinders 50 is connected to a rectangular cylindrical base 5 via a key 52 extending in the vertical direction as shown in FIG.
4A (left side) and 54B (right side) are mounted at the same height so that they can be raised and lowered and cannot rotate around the axis.

A top plate 56 is fixed to the upper end of the column 50 so as to extend horizontally. A lifting motor 58 is attached to the left end of the top plate 56, and this motor 58 rotates a screw shaft 60 arranged along the back surface of the left column 50 via a gear box (not shown). An elevating member 62 fixed to the back surface of the left base 54A is screwed onto the screw shaft 60.

On the other hand, a gear box 64 is fixed to the right end of the ceiling [56], and a rotating shaft 66 is spanned between this gear box 64 and the gear box, so that the power of the motor 58 is transmitted to the gear box 64 as well. Ru.

The output shaft of the gear box 64 is connected to a screw M68 arranged along the back side of the right side circle Note 5/O, and an elevating member 70 fixed to the back side of the right side base 54B is screwed to this screw sleeve 68. ing. As a result, when the lifting motor 58 is operated, both bases 3 4 A, 5
4 B move up and down at low speed while always maintaining the same height.

An annular elbow 72 and a disk portion 74 centered at the center of the front surface are formed on the front surface portion of the left ffll+base 54A. Further, a tilting plate 76 is disposed along the front surface of the circular slope portion 74, and claw plates 76A formed on both sides of the tilting plate 76 are engaged with both sides of the circular groove 72. By sliding 76A, the tilting temporary 76 is the same as that of the disk 74? It rotates 111i.

Furthermore, a rectangular guide rail portion 78 extending in the left-right direction is formed on the front surface of the temporary tilting portion 76 .

This guide rail portion 781 is configured such that an L-shaped plate support plate 80 with an IE end bent forward is attached so as to be movable in the left-right direction, and is pulled to the left with a constant force by a biasing force 11Mflt (not shown). reactor.

In addition, a shaft portion 8 protruding forward is provided at the center of the front surface of the tilting plate 76.
2 is formed, and this shaft 82 projects forward through an elongated hole 84 formed in the temporary plate support 80 and extending in the left-right direction. A bobbin 86 and a sprocket 88, which are coaxially connected to each other, are rotatably supported on the shaft 82.

On the other hand, a drive motor (essential part of the drive mechanism) 9 is mounted on the left side of the left base 54A via a height-adjustable mounting plate 90.
2 is attached facing forward. This drive motor 92
A pulley 94 is fixed to the rotating shaft of the motor, and a belt 96 is wound between the pulley 94 and the boot 86. The tension of this belt 96 can be adjusted by moving the temporary attachment 90 up and down.

On the other hand, the front portion of the right base 54B includes a pair of circular arc grooves 98 extending in the vertical direction and a circular arc Fi. ro10
0 are formed, and these arc grooves 98 and arc plates 100
has a circular arc shape centered on the rotation axis of the left sprocket 88.

Arc @ part! A plate support plate +02 is arranged along this surface on the front surface of 00, and the claws 104 formed on both sides of this plate support plate 102 are inserted into each of the arcs 98, so that the plate support plate 102 forms an arc. It is said that the sprocket on the left side along the plate 100 can be moved more than 5 degrees around the sprocket 88. If this tilting angle is less than 5°, it will be difficult to start cutting into the material W to be cut.

plate support ri. A slide rail 106 extending in the left and right direction is formed on the front surface of the slide rail 102, and a pulley attachment [10B] is attached to the slide rail 106 so as to be movable in the left and right direction. A shaft portion 110 is formed in the center of the front surface of this temporary pulley attachment 108, and this shaft portion 11
A driven sprocket +12 is rotatably attached to the drive sprocket 0 via a bearing. Further, a hydraulic cylinder 114 is fixed to the right end surface of the plate support plate 102 facing leftward, and its robed portion is connected to the temporary pulley attachment 108 .

An operation panel II6 is fixed to the right upper surface of the existing base 54B, and the operation panel II6 controls energization to each part.

The left end of the plate support plate +02 is bent forward into an L-shape, and a rectangular back plate 118 is stretched between it and the right plate support plate 80 on the same plane as the sprockets 88, 112.

This back plate 118 is made of materials such as SUPlli, SNCM steel, SKD steel, SK steel, and stainless steel.
The wall thickness is the same as that of flap 1. Also, back play}
The width of +1.8 is made equal to the winding diameter of the chain cutter C by the sprocket 88112. Furthermore, on the upper and lower edges of the back plate +18, sliding grooves 4 are formed along the inner circumference of the chain cutter C over the entire length.
A U-shaped protrusion (not shown) complementary to 2 is formed.

Then, the chain cutter ch<@ is turned on the sprocket 88.112M, and each flap! Back plate + in the sliding groove 42 of
Projections formed at the upper and lower ends of 18 are slidably fitted into each other.

The sprockets 88 and 112 are each made of a pair of discs 120 and 122 glued together as shown in Fig. 2, and their outer diameter is a value that reaches the center of the connecting convex part 8 of the wound chain cutter C. is set to . Disk 12
A slit 124 whose opening width is slightly larger than the wall thickness of the flap 1 is formed on the outer periphery of the facing surface of the slit 122, and the inside of this slit 124 is spaced from the center of the sprocket by the winding radius of the chain cutter C. At separate positions, cylindrical pins 126 made of cemented carbide are vertically fitted at equal intervals in the circumferential direction. The center angle between the adjacent bins 126 and the center of the sprocket is the sprocket angle S.

On the other hand, a shallow drainage groove 128 is formed in the floor surface and extends in the front-rear direction between both cylinders 50, and a pair of guide rails 130 are installed in parallel at the center of this drainage groove 128. A work table 134 equipped with two pairs of wheels 132 on the lower surface is placed on these guide rails l30, and a traction wire connected to a driver (not shown) is attached to the front and rear ends of the table l34! 36 are concatenated to form table 134
is movable along the guide rail 130.

Now, in order to cut with the chain cutter C using the above-mentioned device, first operate the lifting motor 58 and cut the base 5 4.
A. 5 4 B is raised and table 1
A cutting material W such as a stone placed on the holder 34 is positioned in the front-rear direction.

Next, the plate support plate 102 is lowered along the circular arc section I00, and the chain cutter C and back plate lI8
Tilt the whole part and fix it in this lowered position. Furthermore, left f
While biasing the fl+ plate support plate 80 to the left and applying appropriate tension to the back plate 118, the hydraulic cylinder! 14 to pull the pulley mounting plate 10B to the right,
Keep the tension of chain cutter C at an appropriate value.

In this state, the drive motor 92 is operated and the chain cover C
While rotating in the direction of the arrow in the figure, the lift motor 58 is operated to lower the entire chain cutter C at a predetermined cutting speed, and cuts into the cut material W from the lowered right side. When the cutting depth reaches a certain level, the plate support plate 1
02 is pulled up along the arcuate plate part +00, the chain cutter C is returned to the horizontal position and fixed, and cutting is continued to the lower end of the broken material W.

According to the chain cover C as described above, the following excellent effects can be obtained.

■ Since the connecting protrusions 8 and the connecting notches 10, which are formed to have the same wall thickness as the flap placement, are fitted together to connect each flap l, even the relatively small wall thickness of the flap 1 is sufficient. It is possible to secure a sliding area and obtain high connection strength and tensile strength.

Therefore, since the thickness of the flap 1 is smaller, the abrasive layer tip 30
The thickness of the corrugated material W can be reduced, the cutting allowance can be significantly reduced, and the yield of the corrugated material W can be improved.

■ In the same part of the winding around the sprocket 88 and 112, each flap l is supported in the thickness direction by both side walls of the slit 124, while in the straight part of the chain, the protrusion of the back plate 118 is fitted into the sliding groove 42 of each flap l. Since the position of each flap 1 is regulated in the thickness direction, and the peripheries of the connecting notch 10 and the connecting convex 8 are made of simple cylindrical surfaces, the connection of each flap 1 may come off during cutting. Although no vibration occurs, each flap 1 can be easily separated in the thickness direction when disengaged from the back plate 118 or the sprockets 88, 112.

Therefore, it is necessary to replace the worn flap 1 or replace the chain body 2.
Changes in length etc. can be made extremely easily and quickly.

■ The individual flaps l are small and all have the same shape, and have vertical connecting notches 10 and connecting convex 8.
can be formed with high precision using a relatively simple processing method, so the flap l can be easily mass-produced.

Moreover, since no separate member is required to connect the flaps, the manufacturing cost of the chain cutter C as a whole is low.

■ Since the connecting part of the flap l is flush, it is difficult for chips etc. to accumulate here, and the sliding properties of the connecting part are less likely to be hindered by chips even after long-term use. ■ The number of connected flaps l is Since the length of the chain C can be freely set by simply increasing or decreasing the length, the dimensions of the material that can be cut are not limited.
Even extremely large workpieces can be cut efficiently.

■ Since the abrasive grain segment 4 is removably fixed to the flap I, if the abrasive grain layer tip 30 wears out,
While attached to sprockets 88 and 112,
The abrasive grain segments 4 can be replaced at the four wire portions of the chain, the chain body 2 can be reused, and cutting costs can be reduced.

■ At the straight chain part where the cutting is performed, the engaging grooves 38 formed on both sides of the flap ■ engage with the engaging protrusions 40, and each flap 1 h < 1 is fixed in the form of a plate.
There is no deflection of the flap l in the thickness direction, and cutting accuracy is also improved from this point of view. Furthermore, since the slits 22 of each flap 1 do not open in the straight portion, there is no risk that the abrasive grain segment 4 being cut will fall off.

In addition, the flap! Or/and it is also possible to perform the following surface treatment on the main parts of the cutting device to improve corrosion resistance and abrasion resistance.

(a) Eleven or more substances selected from carbides such as TiC, nitrides such as TiN, borides such as BN, oxides such as Al*Oz, diamond, etc., are processed using ion blating, PVD, or CVD methods. flap l using either
Coating the entire surface or sliding surface. It should be noted that the sliding parts mentioned here include the outer circumferential surface of the connecting convex portion 8, the inner circumferential surface of the connecting notch 10, the inner surfaces of the driven recesses 6A and 6B, the inner surface of the sliding groove 42, and the bubble plate. 1t8 protrusion, pin 1
It refers to the outer peripheral surface of 26.

(b) Using powder plasma overlay or overlay welding,
Flap the wear-resistant material coating layer such as ceramic or cobalt alloy! Formed on the entire surface or sliding surface.

(c) Fixing a highly abrasion-resistant thin plate made of cemented carbide, high-strength ceramics, etc. to the inner surface of the sliding prisoner 42 and/or the edge of the back plate 118 by means of brazing or crimping. Fix it by. If possible, it may be fixed to another sliding surface.

(d) Apply Kanigen plating, hard chrome plating, nickel plating, etc. to the entire flap l or sliding surface.

(e) Apply nitriding or carburizing to the entire surface or sliding portion of flap I in a vacuum heat treatment furnace or the like.

Next, using FIG. IO to FIG. 12, the second
A chain cutter according to an embodiment will be explained.

The flap l shown in the figure is a pair of outer plate 150 and inner plate 152 formed by punching or the like and joined together in three layers by spot welding or the like.
By partially differentiating the shape of the engaging WIt3
8% engagement protrusion 40, back plate sliding screen 42, and segment attachment recess fllN8 with U-shaped cross section N
They each form I8A.

The engaging protrusion 40 and the engaging R3B are each shaped like a trapezoid, and their width is the same as that between the flap l and the sprocket 8.
8 and 112, the flaps are engaged so as not to be movable in the thickness direction as shown in Fig. 10, and when the connection part of each flap (■) is rotated slightly larger than the sprocket angle S, the flaps are engaged or disengaged. set to the value.

In addition, in this example, the mounting convex portion 28A of the abrasive grain segment 4 is
The shape of the mounting Shiro I8 is changed to an oval shape that is elongated in the connecting direction of the flaps 1, and a jig insertion hole 20 is formed in the middle of the slit 22. This jig insertion hole 20 has an elongated rectangular shape in the longitudinal direction of the slit 22,
Correspondingly, as shown in FIGS. 13 and 14, the distal end portion 36A of the attachment/detachment jig is also formed to have a rectangular cross section.

Furthermore, in this example, semicircular life judgment grooves 154 and 156 are formed in the center of the periphery of the connecting notch lO and in the middle of the periphery of the connecting convex part 8, and these life judgment grooves 1
With 54 and 156 aligned, use a round bar-shaped Taber jig (
(not shown) allows the amount of wear on the connecting portion to be determined. With a round bar-shaped tapered jig, there is no need to pay attention to the direction of insertion, so work efficiency can be improved accordingly.

According to the above example, since the flap 1 has a three-layer structure,
By simply punching and spot welding a thin metal plate, any of the back plate sliding 7W42, engagement groove 38, engagement protrusion 42, and ill 8A can be formed easily and with high precision. Processing costs can be reduced compared to a configuration in which these are formed by grinding. Also, 1
Since the depth of 38.42 and the amount of protrusion of the protrusion 40 can be ensured to be large, the effect of preventing flap deflection is increased accordingly.

In addition, in order to replace the flap 1 in the above example, it is sufficient to loosen the chain cutter C and extend a part of the chain cutter C to a sprocket angle S or more. Then, the engagement M38 and the engagement protrusion 40 at that portion are disengaged, and the flap l can be freely removed.

Next, a third embodiment of the present invention shown in FIGS. 15 and 16 will be described. In each of the embodiments described above, the chain cutter C was moved by rotating the drive sprocket 88, but this embodiment is characterized in that a drive mechanism is provided separately.

That is, in this example, instead of forming the driving grooves (6A, 6B') at the edges of the inner circumferential side of the flaps 1, a circular through hole 204 is formed in the center of the connecting groove 8 of each flap 1.
is formed. These through holes 204 do not reduce the strength of the connecting convex portion 8, and the sprocket 204, which will be described later,
The drive bin 206 formed on the outer periphery of the sprocket 2
The inner diameter is set so that it can be easily inserted and removed as the flapper rotates, and the opening edge is chamfered into a curved shape so that the drive bottle 206 can be smoothly inserted on the surface side of the flap. The other configurations are the same as in the first embodiment.

To use this chain cutter C, a pair of rotatable sprockets 88 having slits 124 similar to those described above are required.
, 112, a pair of drive sprockets (drive mechanisms) 200 and 202 are provided to sandwich the straight portion of the chain cutter C, as shown in FIG.

A through hole 20 is provided on the outer peripheral surface of one drive sprocket 200.
Drive pins 206 are fixed at the same intervals as the drive sprockets 200 and 202, and by rotating each drive sprocket 200 202, the drive pins 206 fit into the through holes 204 one after another, the flaps I are fed, and the chain cutter C runs.

Note that the shape of the through hole 204 may be changed to an oval hole, a long hole, a rectangular hole, etc. extending in the longitudinal direction of the chain, so that the drive pin 20
6 may be made easier to enter. Further, the through hole 204 is not limited to the illustrated position, but may be formed at another position that does not cause any problem in terms of the strength of the flap l, for example as shown in FIG.

Further, by attaching a cutting blade segment having saw teeth or the like to each flap 1 instead of the abrasive grain segment 4, the chain cutter can be used for cutting wood or the like without changing the other configurations at all.

In addition, in each of the above embodiments, the sliding groove 42 for the back plate was formed on the flap 1, while the protrusion was formed on the back plate 1118. A sliding groove may be formed in the groove.

Furthermore, the flat chain body of the present invention can be used, for example, as a chain body for power transmission, in addition to the above-mentioned cutting tool.

"Effects of the Invention" As explained above, according to the flat chain body and its drive structure according to the present invention, the connecting convex part and the connecting notch part, which are formed to have the same thickness as the flap, are fitted together. Since the flaps are connected together, sufficient sliding space can be secured even with relatively thin flat flaps, and high connection strength and tensile strength can be obtained.

In addition, in the same part of the sprocket, each flap is supported in the thickness direction by both side walls of the slit, while in the straight part of the chain, the protrusion (or sliding groove) of the back plate is connected to the sliding groove (or sliding groove) of each flap. By fitting the flaps into the strips and regulating the position of each flap in the thickness direction, the connecting notches and connecting convex portions are made into simple cylindrical surfaces, so each flap can be disconnected during cutting. Although there is no wobbling, each flap can be easily separated in the thickness direction when disengaged from the back plate or sprocket. Therefore, replacing worn flaps, changing the length of the chain body, etc. can be done extremely easily and quickly.

In addition, the individual flaps are small and all have the same shape, and the eyebrow surfaces of the connecting notches and connecting convex portions are simple cylindrical, so they can be formed with high precision using a relatively simple processing method, and the flaps Mass production is easy and costs can be reduced.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a partial front view and a sectional view taken along the line ■-■, and FIGS. 6 and 7 are side and front views showing the attachment/detachment jig for the flap, respectively. FIG. 2 is a front view and a partially cutaway plan view of a cutting device using a chain cutter. In addition, FIGS. 10 to 12 are front views, top views, and left side views showing modified examples of the flap, and FIGS. 13 and 1
Fig. 4 is a side view and a front view showing an attaching/detaching jig for the same flap, Fig. 15 is a partial front view showing a peripheral blade type chain cutter according to another embodiment of the present invention, and Fig. 16 is a partial front view showing the same chain cutter. FIG. l... Flap, 2... Chain body, 4... Abrasive segment (cutting blade), 6 A, 6 B... Concave groove for driven, 8... Convex part for connection, IO・... Connection notch, 30. Abrasive layer chip, 32... Attachment/detaching jig, 38.
... Engagement groove for vibration prevention, 40 ... Engagement protrusion for vibration prevention, 42 ... Sliding groove for back plate, 88 ... Drive sprocket (drive mechanism), 112 ... Driven sprocket, +18...back plate, l50...outer plate,
+52...Inner plate, 200.202...Drive sprocket (drive mechanism), 204...Driven through hole, C.
...Chain force ivy, W...shaved material.

Claims (6)

[Claims] (1) A flat chain body in which a large number of flat flaps are rotatably connected within the same plane as the flaps, and the front end of the flap has a circle whose outer peripheral surface is perpendicular to the flap surface. A plate-shaped connecting convex portion is formed flush with the rear end of the flap, and an arcuate connecting portion having an inner circumferential surface perpendicular to the flap surface and having a slightly larger diameter than the connecting convex portion is provided at the rear end of the flap. A connecting notch is formed flush with the connecting convex portion of each flap and rotatably fits into the connecting notch of an adjacent flap. A flat chain body characterized in that a sliding groove or sliding protrusion for a back plate is formed that extends parallel to a line connecting the centers of the connecting notch and the connecting convex portion. (2) At either the left or right end of the front end surface and rear end surface of the flap, an engaging portion is formed that irremovably engages with each other in the thickness direction of the flap while the chain body extends linearly. The flat chain body according to claim 1, characterized in that: (3) The flat chain body according to claim 1 or 2, wherein the flaps are connected in an endless manner. (4) A cutting blade is fixed to at least a portion of the flap at an end opposite to the back plate sliding groove or sliding protrusion. The flat chain body described. (5) The flap is made by joining three layers of plate materials, and the sliding groove or sliding protrusion for the back plate is formed by making the shape of the central plate different from the other two sheets. The flat chain body according to claim 1, 2, 3, or 4. (6) A drive structure for running a flat chain body according to claim 1, 2, 3, 4 or 5, wherein the slit in which one widthwise end of the flat chain body can be inserted perpendicularly to the axis is provided on the outer periphery. A flat chain body is wound around at least one pair of sprockets formed on the surface along the slit, and a sliding groove for the back plate of each flap or a sliding groove is formed in the linearly extending portion of the flat chain body. 1. A drive structure for a flat chain body, comprising a back plate having one end slidably fitted to a protrusion, and further provided with a drive mechanism for rotating the flat chain body and each sprocket.