JP2000043027A - Cutting machine for forming horizontal groove and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply form a recessed groove horizontally in a side wall by rotating a cutter blade while it is made to run along the side wall where the groove is to be formed, and continuously cutting at least the upper and lower line of the groove. SOLUTION: The cutting machine continuously cuts a groove 100 horizontally in the self-advance in a manner that an upper cutter blade 30A cuts an upper end line P1 at a position for the groove 100, a lower end cutter blade 30C cuts a lower end line P2 and further, an intermediate cutter blade 30B cuts at an intermediate position, in a specified cut depth, by switching over from manual traveling to automatic traveling with a clutch handle after initialization. Thus the cutting machine makes a self-advance to perform the automatic horizontal cutting of the upper end line P1, the lower end line P2 and the intermediate line P3 which are parts forming the groove 100. When the groove 100 is long, it is possible to continuously automatically cut from one end to the other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting machine for forming a horizontal groove and a method for forming a horizontal groove, and more particularly, to a method for forming a long horizontal groove continuously on a vertical side wall such as a road side wall. The present invention relates to a cutting machine and a horizontal groove forming method using the cutting machine.

[0002]

2. Description of the Related Art When it is necessary to install a long material in the horizontal direction along an existing side wall made of concrete or the like, the material is attached to the surface of the side wall. It will protrude from the side wall. Therefore, for example, when the additional material is attached to the side wall of the road, there is a problem that the vehicle running on the road comes into contact with the additional material and the additional material is easily damaged. Therefore, it is desired to form a horizontal groove in the side wall so that the additional material can be embedded in the groove.

[0003]

However, conventionally,
A cutting machine used to form a long horizontal groove in the side wall is not provided. Therefore, when attaching an additional material to the side wall of an existing structure, it is necessary to bury the groove and bury the additional material. While recognizing that it was preferable, it was necessary to protrude the additional material from the surface of the side wall and attach it.

[0004] When a small groove is provided on the side wall,
In some cases, a cut is made in the outer periphery of the groove with a hand cutter, and the inside surrounded by the cut is crushed and removed with a drill or breaker. However, providing a continuous long horizontal groove along the side wall in this method has not been adopted because it takes a lot of manpower and work time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and more particularly, a cutting machine suitably used when a horizontal groove is continuously formed in a side surface, and a method of forming a horizontal groove using the cutting machine. The challenge is to provide

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a mobile base mounted on a base for self-running and / or manual running so as to be movable vertically and horizontally. The cutter mounting shaft is rotatably suspended from both left and right sides of the moving table, and at least two cutter blades are detachably fixed to lower ends of the cutter mounting shafts at intervals of a groove width, and Attach the rotation driving means of the mounting shaft and the moving means of the moving table to the base, rotate the cutter blade while running along the side wall forming the groove, and continuously horizontally cut at least the upper and lower lines of the groove. The present invention provides a cutting machine for forming a horizontal groove, which is configured to be able to be used.

[0007] As described above, the cutting machine may be of a self-propelled type equipped with an engine, a manual traveling type in which an operator runs while pushing by hand, or a self-propelled type and a manual traveling type provided with a clutch. May be switched.

A vertically movable table is mounted on the base, a left and right movable table is mounted thereon, and a cutter mounting shaft is mounted on both left and right outer surfaces of the left and right movable table. One movable platform may be provided, and the cutter mounting shaft may be mounted on the movable platform. In addition, a power source such as an engine for rotating and driving the cutter mounting shaft is mounted on the moving table.

When the above-mentioned cutting machine is used to travel along a side wall on which a horizontal groove is to be formed, at least two horizontal cuttings can be simultaneously performed with a required vertical width by a cutter blade. After this cutting, if a portion between the cuts is crushed and removed by a crusher, a horizontal groove can be continuously formed in the side wall.

A structure in which a crushing machine is attached to a base at a position rearward of the mounting position of the cutter blade, cuts by the cutter blade, and crushes the portion sandwiched between the upper and lower cutting lines on the side wall by the crushing machine. It may be.

If a crushing machine such as a hitting breaker or a drill is mounted on the base as described above, it is possible to automatically crush the space between the cuts with a time lag after cutting with a cutter blade. As a result, a continuous horizontal groove along the side wall can be automatically formed.

According to the present invention, there is further provided a moving base mounted on a base for traveling which is self-propelled or / and manually driven so as to be movable up and down and left and right. The mounting shaft is rotatably suspended, and the grinding drum is detachably fixed to the lower ends of these drum mounting shafts, and
Attaching the rotation driving means of the mounting shaft of the grinding drum and the moving means of the moving table to the base, rotating the grinding drum while running along the side wall forming the groove,
Provided is a cutting machine for forming a horizontal groove in which a groove can be continuously formed in a horizontal direction.

In the above-mentioned grinding drum, a grinding tool provided with a diamond chip or the like is fixed to a peripheral surface, and a side wall can be ground to form a groove. That is, there is no need to crush by a crusher after cutting by the cutter blade.

In any case where the above-mentioned cutter blade and grinding drum are provided, the base is provided with a guide roller which is pressed against the side wall surface. The guide roller may be at the front end or the rear end of the base. By pressing the guide roller against the side wall, the cutting depth by the cutter blade and the grinding drum can be made constant.

A cooling water passage is provided inside the cutter mounting shaft or the drum mounting shaft, an injection hole is provided in a peripheral wall near the cutter or drum mounting side, and cooling water is supplied from a water tank mounted on a base. Alternatively, the cooling water is jetted to a cutting portion or a grinding portion of the drum and the side wall.

As described above, when cooling water is sprayed onto the cutter blade or the grinding drum to cool it, the deterioration of the cutter blade or the grinding drum due to the heat generated during operation can be suppressed. In addition, the generation of dust can be suppressed by injecting the cooling water to the cutting position of the side wall by the cutter blade and the grinding position by the grinding drum.

A plurality of cutter blades are mounted on the lower end of the cutter mounting shaft via spacers, and the spacers make the intervals between the upper and lower ends of the cutter blades equal to the widths of the grooves formed in the side walls. With this configuration, it is possible to easily cope with a change in the groove width.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment. The cutting machine 10 of the present invention is provided with wheels 13 below the four corners of a base 11, is self-propelled by an engine 14 mounted on the base 11 as described later, and switches a clutch handle 15. As a result, the operation rod 16 protruding from the rear end of the base 11 is pushed to enable manual traveling.

In the middle of the base 11, there are provided recesses 11a cut from both left and right sides, and the base 11 sandwiched between these recesses is provided.
A hydraulic motor 17 is mounted at the center of the. A central lower surface of a vertically movable table 18 having a substantially H-shaped upper end of the output shaft 17a of the hydraulic motor 17 is fixed. Guide holes 18a are formed in the four corners of the vertical moving base 18 so as to pass through guide posts 19 erected on the base 11, and the vertical moving base 18 can be moved up and down by the hydraulic motor 17 along the guide posts 19. . On the left and right sides of the intermediate portion of the vertical moving table 18, concave portions 18b communicating with the concave portions 11a of the base 11 are provided.
A pair of moving rails 20 are laid on the upper surfaces of the front and rear sides in parallel with the left-right direction (the width direction W of the base).

A rectangular frame-shaped right and left moving base 21 is disposed on the upper surface of the vertical moving base 18 so as to be slidably fitted to a pair of front and rear moving rails 20. Left and right frame 2 of the left and right moving table 21
1a, a rack 22 is mounted, and a support shaft 23a of a pinion 23 meshed with the rack 22 is rotatably supported by a bearing 24 provided on a vertical moving table 18, and the other end of the support shaft 23a An operation handle 25 is attached. Therefore, by rotating the handle 25, the left and right moving table 2 can be moved.
1 can move in the left-right width direction on the base 11.

The upper sides of the cutter mounting shafts 31A and 31B are supported and mounted on the outer surfaces of the left and right side frames 21a of the left and right movable base 21 via bearings so as to be rotatable about the vertical axis. The cutter mounting shafts 31A and 31B are provided with left and right concave portions 11a of the base 11 and left and right concave portions 18 of the vertical moving base 18, respectively.
b. The three disk cutter blades 30A to 30B and 30A 'to 30C' are fixed horizontally to the lower ends of the cutter mounting shafts 31A and 31B on both sides at predetermined intervals via vertical spacers 57. I have. In addition, it is necessary to provide at least two disk cutter blades attached to each cutter mounting shaft, but more than that are provided according to the groove width to be formed,
If the groove width is small, two sheets are sufficient, and if the groove width is large, three sheets are required.
More than one.

The disk cutter blades 30A to 30C (30A 'to 3C) with respect to the cutter mounting shafts 31A and 31B.
As shown in FIG. 4, the spacer 57 for adjusting the groove width and the disk cutter blades 30A to 30C are attached.
C (30A 'to 30C') center bolt holes 57
are provided, and a bolt 58 is inserted from below into each of the bolt through holes so that the cutter mounting shaft 31A,
The spacer 57 and the disk cutters 30A are fixed to the cutter mounting shafts 31A and 31B by being screwed into screw holes opened at the lower end of 31B.

As described above, the spacer 57 is interposed between the disk cutter blades, and by changing the height of the spacer 57, the distance between the disk cutters can be adjusted, and the upper cutter blade 30A and the lower cutter blade 30A can be adjusted. Cutter blade 30C
Are made to match the groove width. The shape of the spacer 57 is not limited to the form shown in FIG.
For example, as shown in FIGS. 5A and 5B, by inclining the upper surface of the spacer 57,
0A or the like can be inclined and attached to the cutter mounting shaft 31A to incline the cut surface.

The four support columns 34 are projected from the four corners of the upper surface of the left and right moving table 21 to move the drive source housing box 35 to the left and right moving table 21.
With a space above it. The drive source storage box 3
5 houses the engine 14 and the output shaft 36 of the engine.
Are projected from the front surface of the drive source housing box 35. The engine 14 has disk cutter blades 30A to 30C, 30
It serves as a drive source for the rotation drive of A 'to 30C' and for the self-propelled operation of the cutting machine, but is not limited to the engine, and a motor may be used.

A transmission 37 is mounted on the lower surface of the drive source housing box 35. The transmission 37 has a horizontal input shaft 37.
a and an output shaft 37b in the vertical direction, and the output torque is increased by decelerating the output shaft 37b by about 30% with respect to the input shaft 37a. Pulleys 38A and 38B are attached to the output shaft 36 of the engine and the input shaft 37a of the transmission 37, respectively, and the power of the engine is transmitted through a belt 39. The pulleys 38A and 38B may be configured to be able to change the speed by changing the respective radii.

Similarly, a pulley 40A is attached to an output shaft 37b of a transmission 37 to which the power of the engine is transmitted, and a belt 41 is attached to a pulley 40B attached to an upper end of a cutter attachment shaft 31A located on both sides of the left and right moving table 21. The cutter mounting shaft 31A is rotated by the engine 14 by being wound. The belt 41 may be hung on the left and right cutter mounting shafts 31A and 31B, but in this embodiment, only one of the cutter mounting shafts is used, and when rotating the other, the belt 41 is changed over the cutter mounting shaft 31B. I have to. Power may be transmitted using a sprocket and a chain instead of the pulley and the belt, and a gear drive may be used when the distance between both shafts is short.

The front wheels 13 are rotated by transmission means (not shown) by the engine 14,
By switching the clutch handle 15, the transmission is taken over to switch between self-running and manual running.

In order to cool the disk cutter blade during the cutting operation, the cutter mounting shafts 31A, 31 on both sides are cooled.
B is hollow, and cooling paths 31A-1 and 31 are provided along the axis.
B-1 is provided, and cooling pipe connection holes 31A-3, 3
1B-3 is provided. In addition, the disk cutter blade 3
0A to 30C and the cooling water hole 30A-2 in the spacer 57.
, 57b are provided so as to penetrate them, and they are assembled in a state where they are communicated with each other. The spacer 57 has a cooling water hole 57b.
An injection hole 57c is provided on the outer peripheral surface in communication with the nozzle hole, and cooling water is injected from the injection hole 57c to cool the disk cutter blade.

The cooling water supply means comprises a water tank 45 and a pump 46 installed at the rear of the base 11, and the water tank 45 is connected to the cooling water passages 31A-1 of the cutter mounting shafts 31A and 31B on both sides by pipes 47 or hoses. , 31B-1, and a cooling water is supplied to the pipe 47 via a pump 46. In addition, cooling water passages 31A-1, 31 on both sides are provided.
A valve is attached to the pipe branch connected to B-1 to switch the flow path and supply the cooling water to the cooling water channel on the used side. The pipe 47 and the cooling water channel 31
The connection with A-1 and 31B-1 may be made detachable, and the cooling water may be supplied by connecting a pipe only to one of the used cutter mounting shafts.

Further, on the left and right sides of the front end of the base 11,
The horizontal shafts 51A and 51B are protruded, and these horizontal shafts 51A and
Guide rollers 52A each having elasticity at the tip of 51B,
Support shafts 53A and 53B to which 52B is rotatably attached are suspended. These guide rollers 52A and 52B are pressed against the side wall to be cut to guide the cutting machine so that the cutting machine can be automatically moved along the side wall.

A hydraulic tank 55 is installed at the front of the base 11 and supplies pressure oil to all hydraulic drive means such as the engine 14 and the hydraulic motor 17 via a pipe (not shown).

Next, a description will be given of an operation of forming a groove extending horizontally in the left side wall of the road by the cutting machine 10. In this case, as shown in FIGS. 6 (A) and 6 (B), the upper end line P of the horizontal groove 100 is moved while the cutter 10 is running along the side wall 60 using only the left cutter blade.
1 and the lower end line P2 are simultaneously and continuously cut.

Prior to the cutting operation, first, the spacer 57 is adjusted so that the distance between the upper cutter blade 30A and the lower cutter blade 30C matches the width D of the groove 100.
To the cutter mounting shaft 31A. The intermediate cutter blade 30B is attached so as to be located at the center of the upper and lower cutter blades.

Thereafter, the operator grips the operating rod 16 to move the cutting machine 10 and presses the guide roller 52A against the side wall 60. In this state, the hydraulic motor 17 is driven,
The vertical moving table 18 is moved up and down to position the cutter blade at the groove forming position on the side wall 60. That is, the upper cutter blade 30A is aligned with the upper end line P1 of the groove 100. Since the vertical position of the cutter blade is set corresponding to the groove width D, when the upper end line P1 is aligned with the upper cutter blade 30A, the position of the lower cutter blade 30C is automatically aligned with the lower end line P2. .

In this state, by turning the handle 25,
The engine 14 is moved while the rack 22 and the left and right moving table 21 are moved toward the side wall 60 by meshing with the pinion 23.
To rotate the cutter mounting shaft 31A and rotate the cutter blades 30A to 30C in conjunction therewith. The side wall 60 is cut in the horizontal direction by the cutter blades 30A to 30C. When the side wall 60 is cut to a predetermined depth, the rotation of the handle 25 is stopped, and the positions of the cutter mounting shaft 31A and the cutter blades 30A to 30B are set.

After the initial setting as described above, when the manual driving is switched from the manual driving to the automatic driving by the clutch handle 15, the cutting machine 10 is self-propelled while the groove 10 has a predetermined depth.
The upper end line P1 at the position of 0 is the upper cutter blade 30A, and the lower end line P2 is the lower cutter blade 30A.
At C, the intermediate position is continuously cut in the horizontal direction by the intermediate cutter blade 30B.

At the time of this cutting operation, the cutter blade 30A
30C, an injection hole 31A-3 provided in the lower portion of the cutter mounting shaft 31A and an injection hole 57c provided in the spacer 57.
More cooling water is sprayed, and it is possible to suppress overheating of the cutter blade due to heat generated during the cutting process. Further, since the cooling water is also injected to the cutting position of the side wall 60, generation of dust can be suppressed.

As described above, the upper end line P1, the lower end line P2, and the intermediate line P3 of the portion that will become the groove 100 are automatically cut horizontally while the cutting machine 10 runs by itself, so that the groove 100 is elongated. In this case, automatic cutting can be performed continuously from one end to the other end.

As described above, after the cutting, the operator mainly operates the impact breaker 70 at the break of the intermediate cutting line P3.
(Or a crusher such as a drill)
When an impact is applied, a crack is formed in the side wall 60 from the line P3, and concrete or the like on the side wall 60 between the cut upper and lower lines P1 and P2 is crushed. By removing the crushed pieces, the groove 100 can be formed between the upper and lower lines P1 and P2.

For example, when grooves 100 are formed on the left and right side walls of a two-lane tunnel, the left side wall is cut from one end to the other end by the cutting machine 10 as described above, and then the direction of the cutting machine 10 is changed. The cutting machine 10 can be run in the opposite direction from the other end to one end, and the right side wall can be cut by the cutter blades 30A to 30C. After cutting, the groove 100 is formed by crushing using a breaker in the same manner as the left side wall.

When grooves 100 are formed on the left and right side walls of one lane, after the grooves 100 are formed on the left side wall, the cutting machine 10 is run in the same direction as when cutting the left side wall, and the right side cutter blade 30A is cut. The right side wall is cut at 'to 30C', and then crushed by a breaker to form the groove 100.

As described above, since the cutter blades on the left and right sides of the cutting machine can be attached, the side wall can be cut by running the cutting machine in accordance with the traveling direction of the road.

When a large number of disk cutter blades to be mounted on the cutter mounting shaft are mounted at close intervals, removal of the side wall remaining between the cutting lines can be performed more easily.

FIGS. 7 and 8 show a second embodiment. In the above-described first embodiment, after performing horizontal cutting of the side wall 60 with the cutter blade of the cutting machine 10, the worker performs the crushing operation with the impact breaker, but in the second embodiment,
A hitting breaker 70 is mounted at the rear of the cutting machine 10.

The breaker 70 is provided with the cutter blade 30.
It is installed on the base 11 at a position behind the A to 30C (30A 'to 30C'). That is, the main body 7 of the breaker 70
1 is installed on the lower surface of the base 11, the chisel 72 is projected from the main body 71 in a horizontal direction, and the chisel 72 is automatically expanded and contracted and hit, so that the crushing operation by the hit by the breaker can be automatically performed. I have to. Pressure oil to the impact breaker 70 is supplied from a hydraulic tank mounted on the base 11 via piping.

The acute angle portion 72a of the chisel 72 is set in advance at substantially the same height as the intermediate cutter blade, and the acute angle portion 72a at the distal end of the chisel bites into the line P3 cut by the cutter blade, and is hit. . As described above, when the crushing is performed at intervals by the hitting breaker 70 while providing a time difference while cutting with the cutter blade, the manual operation by the operator can be performed only by removing the crushed pieces, and The operation of forming the horizontal groove can be performed more efficiently and more efficiently.

FIGS. 9 and 10 show a third embodiment.
In the third embodiment, a grinding drum 80 is used in place of the cutter blade, and the two-stage operation of cutting and removing using a breaker in the first and second embodiments and then using a breaker is performed at once by grinding. Like that. That is, the cutting machine 10 is running while the grooves 100 are recessed by the grinding drum 80.

In the third embodiment, the drum mounting shaft 31A '
A substantially drum-shaped grinding drum 80 is fixed and attached to the lower end of (31B ') with bolts 81. The grinding drum 8
Numeral 0 has an outer peripheral surface 80a having a thickness D 'opposite to the width D of the groove 100 to be formed, and upper and lower end surfaces 80b and 80c have a trapezoidal shape inclined up and down toward the center.

Grinding tools 81 are fixed at intervals along the bending line between the outer peripheral surface 80a of the main body of the grinding drum 80 and the upper and lower end surfaces 80b and 80c. The grinding tools 81 are fixed to the outer peripheral surface 80a and the upper and lower end surfaces 80b and 80c in a staggered arrangement. As shown in FIG. 10, the grinding tool 81 has a diamond tip 81a fixed to a bolt head 81b, and a bolt shaft 81c screwed and fixed to a screw hole formed in a grinding drum main body.

When the grinding drum 80 is used, as shown in FIG. 9, the side wall 60 is ground by a grinding tool 81 to form a concave groove 100, and the cutting machine 10 is run along the side wall 60. The groove 100 'can be continuously formed in the horizontal direction.

Note that the present invention is not limited to the above-described embodiment, and the cutter blade or the grinding drum is applied to the side walls on both sides of the road so that the protruding distance of the cutter mounting shaft or the drum mounting shaft from the base can be adjusted. The two side walls may be in contact with each other to perform horizontal cutting or grinding at the same time. In this case, horizontal grooves can be simultaneously formed in the walls on both sides.

[0052]

As is apparent from the above description, according to the horizontal groove forming cutter according to the first aspect of the present invention, the upper and lower two horizontal cuts can be simultaneously made to the required length while the cutter is running. Can be performed continuously. Therefore, after slicing, crushing between the cutting lines with a crusher makes it possible to easily form a horizontal groove in the side wall.

Further, when the horizontal groove forming cutter according to the second aspect is used, the horizontal groove can be cut by the crusher with a time lag after the horizontal cut by the cutter, and the horizontal groove can be formed on the side wall without crushing by the operator. Can be formed.

Further, when the horizontal groove forming cutter according to the third aspect is used, the grooves can be continuously formed by grinding.

As described above, by using the cutting machine for forming a horizontal groove of the present invention, a horizontal groove can be continuously formed on an existing side wall by a required length, and an additional material can be embedded in the groove.
It is possible to prevent the additional material from projecting from the side wall, thereby preventing the additional material from being damaged.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is an exploded perspective view of a cutter blade.

FIG. 5A is a perspective view showing a modification of the spacer,
(B) is a perspective view showing the state of the cutter blade when the spacer of the modified example is used.

FIGS. 6A and 6B are diagrams showing a method of forming a groove in a side wall.

FIG. 7 is an operation drawing of a main part of the second embodiment.

FIG. 8 is a view showing a state in which a groove is formed using the cutting machine of the second embodiment.

FIG. 9 is an operation drawing of a main part of a third embodiment.

10A is a perspective view of a grinding drum, and FIG. 10B is an enlarged perspective view of a grinding tool attached to the grinding drum.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Cutting machine for horizontal groove formation 11 Base 13 Wheel 14 Engine 17 Hydraulic motor 18 Vertical moving table 21 Left and right moving table 22 Rack 23 Pinion 30A-30C, 30A'-30C 'Disk cutter blade 31A, 31B Cutter mounting shaft 31A- 1, 31B-1 Cooling water channel 45 Water tank 52A, 52B Guide roller 57 Spacer 57c Injection hole 60 Side wall 70 Impact breaker 80 Grinding drum 81 Grinding tool 100 Groove P1 Top line P2 Bottom line

Claims (8)

[Claims] 1. A moving base mounted movably in vertical and horizontal directions on a traveling base that is self-propelled or / and manually run, and a cutter mounting shaft is rotated from both left and right sides of the moving base. At least two cutter blades are detachably fixed to the lower ends of the cutter mounting shafts at intervals of the groove width, and the cutter mounting shaft rotation driving means and the moving table moving means are attached to the lower end of the cutter mounting shaft. A cutting machine for forming a horizontal groove, wherein the cutter blade is rotated while running along a side wall forming a groove, and is capable of continuously cutting at least the upper and lower lines of the groove. 2. A crusher is mounted on a base at a position rearward of the mounting position of the cutter blade, and after being cut by the cutter blade, a portion of the side wall sandwiched between upper and lower cutting lines is hit by the crusher to be crushed. The cutting machine for forming a horizontal groove according to claim 1, wherein 3. A moving base mounted to be movable in the vertical and horizontal directions on a base for self-running and / or manual running, and a drum mounting shaft is rotated from both left and right sides of the moving base. The grinding drum is removably fixed to the lower ends of the drum mounting shafts, and the driving means for rotating the mounting shaft of the grinding drum and the moving means for the moving table are mounted on the base to form grooves. A horizontal groove forming cutter configured to rotate the grinding drum while running along a side wall to be continuously formed in a horizontal direction. 4. The cutting machine for forming a horizontal groove according to claim 1, wherein a guide roller which presses against the surface of the side wall protrudes from the base. 5. A cooling water passage is provided inside the cutter mounting shaft or the drum mounting shaft, an injection hole is provided in a peripheral wall near a cutter or drum mounting side, and cooling water is supplied from a water tank mounted on a base. The cutting machine for forming a horizontal groove according to any one of claims 1 to 4, wherein cooling water is injected to a cutting portion or a grinding portion of the cutter, the drum, and the side wall. 6. A plurality of cutter blades are attached to a lower end of the cutter attachment shaft via a spacer, and a distance between cutter blades at upper and lower ends and a width of a groove formed on a side wall are made to match by the spacer. Item 6. The cutting machine for forming a horizontal groove according to any one of Items 1, 2, 4, and 5. 7. The horizontal groove forming cutter according to claim 1, wherein the cutter is caused to travel along a side wall, and at least two horizontal cuts are formed on the side wall with a required vertical width. A horizontal groove forming method in which the cutting is performed at the same time and then the portion between the cuts is crushed and removed by a crusher to form a horizontal groove continuously on the side wall. 8. A horizontal groove, wherein the horizontal groove is continuously formed in the side wall by using the horizontal groove forming cutter according to claim 2 or 3, and moving the cutter along the side wall. Forming method.