JP2000326129A - Column inner face cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a column inner face cutting device for automatically cutting a bead on the inner face of a column and enhancing the smoothness of the inner face of the column as well. SOLUTION: When a self-traveling carriage 12 is made to travel in a pipe of a column 11 to the direction of a pipe axis by a traveling motor 13 as a rotary cutting edge 14 remains pushed against a bead (a) and a build-up (b) therearound, the rotary cutting edge 14 being rotated by a rotating motor 15 gradually cuts the bead (a) and the build-up (b) off. In this way, the bead (a) and the build-up (b) on the inner face of the column 11 can be automatically cut off. Still, although the bead (a) is only cut off in conventional cutting work on the inner face of the column 11, the build-up (b) is also cut off, enhancing the smoothness of the inner face of the column 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column inner surface cutting device, and more particularly, to cutting off a bead formed on a tube inner surface of a welded portion and a built-up portion around the bead at the time of manufacturing a column by welding. The present invention relates to a column inner surface cutting device for improving smoothness.

[0002]

2. Description of the Related Art A column which is a rectangular tube is manufactured by pressing the welded ends in abutting condition and welding the abutting portion. At the time of welding, a weld mark called a bead generally having a width of 5 to 12 mm and a thickness of 5 to 12 mm is formed on the inner surface and outer surface of the pipe at the welded portion. This bead has been cut in a subsequent bead cutting step (finishing step). FIG. 16 is an explanatory view showing a bead and a build-up portion of the bead according to the conventional means during a cutting and removing operation. As shown in FIG. 16, in the conventional cutting operation of the bead a on the inner surface of the column 100, first, an operator inserts a long bead cutting rod 101 into the tube of the column 100. Then
Bit 10 fixed to the tip of this bead cutting rod 101
2 is pressed against the bead a. Subsequently, the bead cutting rod 101 is pulled as it is, and the cutting is performed while the bead a is continuously hooked by the cutting tool 102.

[0003]

As described above, in the conventional bead a cutting process, the entire operation is a manual operation by an operator. Therefore, a technique with a high level of skill has been required to increase or decrease the force for pressing the cutting tool 102 of the long bead cutting rod 101 against the bead a or to adjust the force when pulling the bead cutting rod 101. That is, if the pressing force of the cutting tool 102 is too weak, the streak-like root of the bead a is left uncut over the entire length of the bead a.
Conversely, if the pressing force of the cutting tool 102 is too strong, a groove is formed by cutting into a part of the welded portion of the column 100, and there is a problem that the strength of the column 100 is reduced. On the other hand, if the pulling speed of the bead cutting rod 101 is low, there is a problem that the workability of the bead cutting operation is reduced. Furthermore, if the pulling direction of the bead cutting rod 101 is not stable, the cutting edge of the cutting tool 102 will meander, and the bead a will be cut off sparsely, or the inner surface of the column 100 will be damaged by the cutting edge that is shifted laterally. was there.

[0004] In addition, there are problems other than the above. That is, before welding work of the column 100 where the bead a occurs, a large external pressure is applied from both sides of the column 100 by a pair of clampers (not shown), and the welded ends of the column 100 are butted. This state is maintained until the welding operation is completed. Due to the external pressure at the time of the butt, a cave is generated at the butt portion of the column 100, and the inner surface of the column 100 is usually 20 to 80 m wide.
m, an overlaid portion b having a thickness of 1 to 3 mm was exposed. However, in the bead cutting process to date, attention has been paid only to the cutting of the bead a as described above, and the problem of the overlaid portion b has been almost ignored. As a result, the smoothness of the inner surface of the column 100 was not sufficient even after the bead a was completely cut off. For this reason, when inserting a diaphragm (not shown) into the manufactured column 100,
However, there was a problem that the diaphragm could not be inserted smoothly.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a column inner surface cutting device capable of automatically cutting a bead on the inner surface of a column and simultaneously improving the smoothness of the inner surface of the column. . In addition, the present invention
It is an object of the present invention to provide a column inner surface cutting device which can cope with columns having different diameters, and which can cut off the beads and the overlaying portion without excess or deficiency in accordance with the appearance condition. . It is a further object of the present invention to provide a column inner surface cutting device that enables a self-propelled vehicle to stably travel within a column regardless of the diameter of the column.

[0006]

According to a first aspect of the present invention, there is provided a self-propelled vehicle which travels in a tube axis direction by a traveling means in a column of a rectangular tube, and a column provided on the self-propelled vehicle. A cutting rotary blade for cutting off a bead, which is a welding mark formed on the inner surface, and an overlaid portion around the bead generated when butted ends of the column are butted, and a rotating means for rotating the cutting rotary blade And a column inner surface cutting device comprising: The material, length, diameter, thickness, etc. of the column are not limited. However, in the case of a normal column, it is made of steel,
The caliber is □ 350mm (350mm × 350mm),
□ 400 mm (400 × 400 mm). The thickness is □ 350 mm and □ 400 mm, and is usually 9 mm, 12 mm, 16 mm, 19 mm, 22 mm.
mm.

[0007] The shape, size, length and the like of the self-propelled carriage are not limited. The point is that it only needs to be inserted into the column and be able to travel in the pipe. The traveling means of the self-propelled carriage is not limited. Traveling by an electric motor or traveling using hydraulic pressure or pneumatic pressure by an actuator may be used.
Further, the arrangement of the traveling means is not limited. It may be on the front side of the cutter or on both sides. The traveling speed of the self-propelled trolley is not limited. Any speed can be used as long as the bead and its built-up portion can be satisfactorily cut off by the rotating cutting blade.
The diameter of the cutting rotary blade is not limited. Normally, the diameter is preferably such that the bead and the built-up portion can be cut off collectively. The rotation speed of the cutting rotary blade is not limited. Further, the pressing force of the cutting rotary blade against the bead and the overlaid portion is not limited. The rotating means of the cutting rotary blade is not limited. For example, it may be a motor or an actuator.

According to a second aspect of the present invention, there is provided a rotary blade pressing means for moving the cutting rotary blade to the bead side and pressing the cutting rotary blade against a bead and / or an overlaid portion. The column inner surface cutting device according to claim 1, further comprising a cut amount adjusting unit that adjusts a cut amount of the blade into a bead and / or a built-up portion. At the start of cutting, the cutting edge of the cutting rotary blade may be pressed against any one of a bead, an overlaid portion, a bead, and an overlaid portion. However, it is usually the tip of the bead protruding inward of the column unless it is a defective welding location. The rotary blade pressing means is not limited. For example, an air cylinder, an electric motor, and the like can be given. The cut amount adjusting means is not limited. For example, a screw adjustment structure or the like that adjusts the length of the protruding edge of the rotary blade from the mounting portion of the rotary blade on the self-propelled trolley side can be employed.

According to a third aspect of the present invention, a pair of side running rollers capable of contacting the inner surface of the column is disposed on both sides of the self-propelled vehicle, and the side running rollers corresponding to the self-propelled vehicle are provided. The column inner surface cutting device according to claim 1 or 2, further comprising a roller interval adjusting means for adjusting an interval between the columns. The side running roller may be a driving roller that is constantly pressed against the inner surface of the column during running of the bogie and is rotated by the driving unit, or a free roller that does not include the driving unit. During the traveling of the carriage, a gap larger than the dimensional change of the column diameter may be provided between each of the side traveling rollers and the inner surface of the column so that the traveling resistance of the carriage does not occur.

[0010]

According to the present invention, when the self-propelled carriage is caused to travel in the tube axis direction in the column tube by the traveling means while the cutting rotary blade is pressed against the bead and the surrounding build-up portion, the traveling is caused. Then, the cutting rotary blade being rotated by the rotating means gradually removes the bead and the surrounding build-up portion. In this manner, the bead on the inner surface of the column and the overlaid portion around the bead can be automatically cut off. Moreover, in the conventional cutting operation of the inner surface of the column, only the cutting of the bead has been performed. On the other hand, according to the present invention, since the build-up portion is also removed, the smoothness of the inner surface of the column can be improved.

In particular, according to the second aspect of the present invention, the cutting edge of the cutting rotary blade is pressed against the bead and / or the built-up portion by the rotary blade pressing means in accordance with the diameter of the column. Even if there is no problem, the bead and the overlaid portion can be cut off without any trouble. In addition, since the cut amount adjusting means adjusts the cut amount of the cutting rotary blade into the bead and / or the overlaid portion, the bead and the overlaid portion are excessively or deficient according to the projecting state of the bead and the overlaid portion. It can be resected without.

Further, according to the third aspect of the present invention, the distance between the side running rollers disposed on both sides of the self-propelled carriage is adjusted by the roller distance adjusting means in accordance with the diameter of the column. Even if the columns differ, the traveling of the self-propelled carriage in the columns can be stabilized with little backlash.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A column inner surface cutting device according to an embodiment of the present invention will be described below with reference to the drawings. In addition,
For convenience of explanation, the machine length direction of the column inner surface cutting device in the drawing is defined as an X direction, the machine width direction is defined as a Y direction, and the height direction is defined as a Z direction. FIG. 1 is a perspective view showing a contracted state of a column inner surface cutting device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a column inner surface cutting device according to one embodiment of the present invention. FIG. 3 is an enlarged longitudinal sectional view of a main part showing a transmission system of a running force of the column inner surface cutting device according to one embodiment of the present invention.
FIG. 4 is an enlarged sectional view of a main part showing a peripheral portion of a cutting rotary blade of the column inner surface cutting device according to one embodiment of the present invention.
FIG. 5 is an enlarged plan view of the cut amount adjusting means of the column inner surface cutting device according to one embodiment of the present invention. FIG. 6 is an enlarged sectional view of a main part of a cutting amount adjusting means of the column inner surface cutting device according to one embodiment of the present invention. FIG. 7 is an enlarged cross-sectional view of a main part of the column inner surface cutting device according to an embodiment of the present invention, in which the interval between the side running rollers is being adjusted using the roller interval adjusting means. FIG. 8 is a perspective view showing an expanded state of the column inner surface cutting device according to one embodiment of the present invention.
FIG. 9 is an explanatory view showing the column inner surface cutting device according to one embodiment of the present invention during a column inner surface cutting operation in a contracted state. FIG. 10 is an explanatory view showing a column inner surface cutting operation in an expanded state of the column inner surface cutting device according to one embodiment of the present invention. FIG. 11 is a longitudinal sectional view showing a state before starting column insertion of the column inner surface cutting device according to one embodiment of the present invention. FIG. 12 is a rear view showing a connection state between the insertion guide rail of the column inner surface cutting device and the column according to one embodiment of the present invention. FIG. 13 is a longitudinal sectional view showing a state of discharge from the column of the column inner surface cutting device according to one embodiment of the present invention. FIG. 14 is a front view showing a connection state between the discharge guide rail of the column inner surface cutting device and the column according to one embodiment of the present invention. FIG. 15 is an explanatory view showing a bead and its built-up portion during cutting and removing work using the column inner surface cutting device according to one embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes a column inner surface cutting device. The column inner surface cutting device 10 is a self-propelled truck 1 that travels in a tube of a column 11 of 350 mm long in the X direction.
2, a traveling motor 13 which is an example of traveling means of the self-propelled vehicle 12, and a bead a provided on the self-propelled vehicle 12
And the cutting rotary blade 14 for cutting off the overlaid portion b therearound
A rotary motor 15 which is an example of a rotating means for rotating the cutting rotary blade 14, and an air cylinder 17 which moves the cutting rotary blade 14 upward on the bead a side and presses the cutting rotary blade 14 against the bead a. (Rotary blade pressing means),
Cutting amount adjusting means 200 for adjusting the cutting amount of the cutting rotary blade 14 into the bead a and the overlaid portion b, and two side running members arranged on both sides of the self-propelled vehicle 12 and capable of contacting the inner surface of the column. And roller interval adjusting means 202 for adjusting the interval between the rollers 201. Hereinafter, these components will be described in detail.

As shown in FIG. 1 to FIG.
Is a bogie main body 1 mainly having a thick wall and a rectangular shape long in the X direction.
8, a relatively thin X-direction lower bogie portion 19 disposed below the bogie body 18, and a relatively thin X-direction long elongate bogie portion 20 disposed above the bogie body 18.
And a tip bucket 21 which is connected to the rear portion of the bogie main body 18 via a connecting plate 16 and stores the cut bead a and the overlaid portion b. Dolly body 18
The two air cylinders 17 are housed in series in the X direction at a predetermined interval from each other.
The bogie main body 18 and the upper bogie section 20 are mainly integrally connected via a cut amount adjusting means 200 described later. At the rear end of the lower carriage 19, a tip bucket 21 is provided.
Are temporarily connected to each other. At both ends on the rear side of the truck of the bucket temporary placing portion 19a,
The lower traveling guide roller 19b is pivotally supported. Also,
Brushes 19c and 19d, whose tips are downward and extend in the Y direction, are implanted on the front end surface of the bogie portion of the lower bogie portion 19 and the rear end surface of the bogie of the temporary bucket portion 19a. While the column inner surface cutting device 10 is running, the brush 19
By c, the beads a and the overlaid portions b that have fallen on the lower inner surface of the column 11 are scraped.

A pair of brushes 21b, which gradually widen toward the distal end, are implanted in the X direction at both upper edges of the tip bucket 21 in the Y direction. During travel of the column inner surface cutting device 10, the tip of the brush 21 b contacts both inner surfaces of the column 11. This can prevent the cut bead a and the overlaid portion b from spilling down to both sides of the bucket. On both sides of the rear end of the lower carriage 19, another lower traveling guide roller 19e is provided.
Is supported. Rod 17a of each air cylinder 17
Is fixed to a position facing the lower bogie section 19. On both sides of the rear end of the bogie portion of the lower bogie portion 19, the tip ends of rods 17b of a pair of small pneumatic cylinders 17A are fixed. This small-diameter cylinder 17A assists the air cylinder 17.

Further, the rear portion of the upper bogie section 20 has a large U-shaped cutout portion 20a formed in a plan view, and has a bifurcated shape. In the notch 20a, the cutting rotary blade 14 is housed with a donut-shaped cutting edge arranged above the upper carriage 20. Note that the upper end of each small-diameter cylinder 17A is fixed to the tip of a pair of arms 20b that form a forked portion of the upper bogie unit 20, respectively. A pair of upper traveling guide rollers 20c whose axial direction is directed to the Y direction are supported in the vicinity of the bases of the arm portions 20b. With such a configuration, when the rods 17a of both air cylinders 17 and the rods 17b of both small-diameter cylinders 17A are simultaneously put in and taken out, the bogie main body 18, the upper bogie unit 20, and the chip bucket 21 move up and down integrally.

As shown in FIGS. 2 and 3, a first power transmission system 22 for transmitting the traveling force of the column inner surface cutting device 10 driven by the traveling motor 13 is housed inside the bogie main body 18. Have been. Further, a second power transmission system 23 for transmitting the rotational force of the cutting rotary blade 14 driven by the rotary motor 15 is also accommodated. These first and second power transmission systems 22 and 23 are connected to the Y
It is stored in both sides of the direction. First, the first power transmission system 22 will be described. The traveling motor 13 has a motor storage space 21 defined below the tip of the tip bucket 21.
a. The output shaft protrudes to the outside of the bogie main body 18, and a drive gear 13a is fixed to the protruding portion. The drive gear 13a meshes with a large gear 25 fixed to the distal end of a short shaft 24 protruding outside from the center near the one end of the rear end plate 18a of the bogie main body 18. A small gear 26 is fixed to the base of the short shaft 24. On the other hand, a long shaft 27 is bridged between the centers of one end of the rear end plate 18a and the front end plate 18b of the bogie main body 18. The rear end plate 18a of the long shaft 27
A small gear 28 that meshes with the small gear 26 is fixed to a portion protruding to the outside.

Worm gears 29 and 30 are fixed to the end of the long shaft 27 on the front side of the bogie and the vicinity of the intermediate portion, respectively. On the other hand, near the end of the bogie main body 18 on the front side of the bogie and one end of the intermediate portion in the Y direction, bearings 3 are provided.
A pair of cylindrical shafts 33 extending in the Z direction via
34 is rotatably housed. These cylindrical shafts 3
3, 34 are formed with square holes having a square cross section extending in the axial direction. Worm wheels 35 and 36 meshed with the worm gears 29 and 30 are fitted to ends of the cylindrical shafts 33 and 34 on the bearing 32 side, respectively. At the end of the lower bogie portion 19 on the front side of the bogie and near the middle portion, the base portions of a pair of long power transmission shafts 39 and 40 extending in the Z direction are rotatably provided via bearings 37 and 38, respectively. Has been established. The tips of the power transmission shafts 39 and 40 projecting toward the bogie main body 18 are prismatic. These tips are loosely inserted into and removed from the square holes from the lower end openings of the cylindrical shafts 33 and 34. A worm gear 4 is provided between the bearings 37 and 38 of the power transmission shafts 39 and 40.
1, 42 are externally fitted. In the vicinity of the bogie front end and the middle portion of the lower bogie portion 19, running shafts 45, 46 extending in the Y direction, to which lower running rollers 43, 44 are fixed at oppositely protruding ends, respectively, are provided laterally. It is suspended. Worm wheels 47, 48 meshing with the worm gears 41, 42 are externally fitted to one ends of the traveling shafts 45, 46.

Next, a pair of short power transmission shafts 51, 52 extending in the Z direction are provided near bearings 49, 50 near the front end and intermediate portion of the upper bogie unit 20, respectively.
Is rotatably provided inside. The tips of the power transmission shafts 51 and 52 projecting toward the bogie main body 18 are prismatic. These tips are loosely inserted into and removed from the square holes from the upper end openings of the cylindrical shafts 33 and 34. Worm gears 41A and 42A are fitted between bearings 49 and 50 of power transmission shafts 51 and 52, respectively. Further, running shafts 55 and 56 extending in the Y direction and having upper running rollers 53 and 54 fixed to both ends of the upper bogie portion 20 on the front side of the bogie and near the intermediate portion thereof are respectively extended laterally. ing. One end of each of the running shafts 55, 56 is attached to the worm gears 41A, 41A.
Worm wheels 57 and 58 that mesh with 2A are externally fitted. The rotational force of the traveling motor 13 is, in order from the output shaft, a gear 13a, a gear 25, a short shaft 24, and a gear 2.
6, gear 28, long shaft 27, worm gear 29,
30, worm wheels 35, 36, cylindrical shafts 33, 3
4, power transmission shafts 39, 40, 51, 52, worm gears 41, 42, 41A, 42A, worm wheel 47,
48, 57, 58, and running shafts 45, 46,
Via 55 and 56, the power is transmitted to the lower running rollers 43 and 44 and the upper running rollers 53 and 54.

Next, the second power transmission system 23 will be described with reference to FIG. The rotary motor 15 is mounted in a cantilevered state on an outer surface of a mounting plate 59 fixed to the front end plate 18b of the bogie main body 18. The output shaft protrudes into the bogie main body 18 through a through hole formed in the center of each of the mounting plate 59 and the front end plate 18b. The drive gear 60 is fixed to this protruding portion. On the other hand, the bogie body 1
A medium-sized shaft 63 long in the X direction is supported via bearings 61 and 62 from the vicinity of the other end of the front end plate 18b of FIG. A gear 64 meshed with the drive gear 60 is fixed to an end of the intermediate shaft 63 on the bearing 61 side. A gear 65 is fixed to an end of the intermediate shaft 63 on the bearing 62 side.

A gear 66 meshing with the gear 65 is arranged at the center of the bogie main body 18 near the middle. That is, a bearing 67 is provided at a central portion near the rear portion of the bogie main body 18, and the short shaft 6 is attached to the bearing 67 along the X direction.
8 is pivotally supported, and the short shaft 68
The gear 66 is fixed to the front end of the bogie. A small-diameter small bevel gear 69 is fixed to the rear end of the short shaft 68 on the carriage. As shown in FIG.
The small bevel gear 69 has a large bevel gear 7 externally fitted to the base of a rotary shaft 70 extending along the Z direction of the cutting rotary blade 14.
1 is engaged. The rotating shaft 70 has bearings 72, 7
3, the rotary shaft 70 is rotatably supported in the vicinity of the rear end of the bogie main body 18. An upper end of the rotary shaft 70 protruding from the upper plate of the bogie main body 18 toward the upper bogie portion 20 is provided with a cutting rotary blade. 14
Is fixed. The rotation force of the rotation motor 15 is, in order from the output shaft, a gear 60, a gear 64, a medium shaft 63,
Gear 65, gear 66, short shaft 68, small bevel gear 6
9, through the bevel gear 71 and the rotating shaft 70, the cutting rotary blade 14
Is transmitted to Thereby, the cutting rotary blade 14 rotates around the axis of the rotary shaft 70 along the Z direction.

On the rear end of the bogie main body 18,
A chip discharge guide plate 74 that is long in the X direction and is externally exposed through the cutout portion 20a of the upper carriage 20 is provided. At the end of the tip discharge guide plate 74 on the rear side of the carriage,
A chip discharge port 78 having a rectangular shape in a plan view for discharging the bead a (chip) and the overlaid portion b (chip) cut by the cutting rotary blade 14 is formed. At the lower part of the chip discharge port 78, a chute 80 for dropping and guiding these beads a and the overlaid portion b to the upper surface of a chip insertion guide plate 79 mounted on the front side of the bogie of the chip bucket 21 is fixed. Have been. The tip of the column 11 is located around the outer periphery of the tip discharge guide plate 74.
A cut-out bead a or overlay b
A brush 74a is provided to prevent leakage of the brush to the outside. The chips of the beads a and the overlaid portions b cut by the cutting rotary blade 14 are discharged to the rear of the bogie along the upper surface of the chip discharge guide plate 74, and thereafter, the chip discharge port 78, the chute 80, and the chip input guide plate 79. Is stored in the chip storage portion 81 of the chip bucket 21 via the.

Next, the cut amount adjusting means 200 will be described in detail with reference to FIGS.
As shown in FIGS. 1, 3, 5, and 6, the cut amount adjusting means 200 is provided between the center of the front end of the upper bogie unit 20 and the center of the front end of the bogie main body 18. It is buried in a handing over state. Specifically, a circular through hole 20d is formed in a central portion between the upper traveling rollers 53 and 54 of the upper bogie unit 20 in a plan view. An adjustment screw 205 having a relatively large cutting depth, which is long in the Z direction and has a relatively large diameter, is rotatably attached to the through hole 20d via upper and lower bearings 203 and fixing nuts 204. Substantially all of the screw portion of the cut amount adjusting screw 205 is
Is screwed to a cut amount adjusting nut 206 buried in the upper part. On the upper surface of the flat head of the adjusting screw 205,
A circular nameplate 207 is fixed in plan view. On the upper surface of the nameplate 207, 0 to 6 scales are written every 60 degrees. Further, each scale is equally divided into ten. A short hexagonal bolt 208 is integrally fixed to the head of the nut 206 so as to pass through the center of the nameplate 207. Further, a tongue-shaped depression 20e is integrally formed on one side of the through hole 20d in the Y direction and communicates with the upper portion of the through hole 20d in a plan view. This depression 20
A small diameter through hole 20f is formed in the center of e.

The lower end of the through hole 20f has the bogie main body 1.
8 has a cylindrical scale collar 209 fixed to the upper surface thereof.
Is inserted. On the outer peripheral surface of the scale collar 209, a notch amount cut in units of millimeters is displayed. One fine scale of the nameplate 207 is a scale that divides 6 mm on the scale color into 60 equal parts.
An arrow plate 210 indicating a scale on the nameplate 207 is attached above the scale collar 209 and the cut amount adjusting screw 205 on the bottom surface of the depression 20e. The hexagonal bolt 208 is covered with a socket of a ratchet handle (not shown), and the ratchet handle is operated to rotate the adjustment screw 205 through the hexagonal bolt 208 so that the adjustment screw 205 from the upper end of the cut amount adjustment nut 206 is removed. Adjust the amount of protrusion. Therefore, the cutting rotary blade 1
The cutting amount of the cutting edge of No. 4 into the bead a and the overlaid portion b is adjusted. That is, the cutting rotary blade 14 is fixed on a bogie main body 18 separate from the upper bogie unit 20. Therefore, by raising or lowering the height position of the upper bogie section 20, specifically, the upper surface of the upper bogie section 20, with respect to the cutting edge of the cutting rotary blade 14 having a fixed height position, The cutting amount of the cutting edge into the bead a and the overlay portion b of the cutting edge is adjusted.

In addition, an elongated through hole 20g extending in the Y direction and having a leading end communicated with the vicinity of the upper portion of the through hole 20d is formed in an upper portion of one side of the upper bogie section 20. This through hole 2
The outer end portion of 0 g is a slightly larger inner thread portion 20h. A lock pin 211 for fixing the rotation of the cut amount adjusting screw 205 is screwed into the through hole 20g in a state where the outer screw portion 211a of the base portion is screwed to the inner screw portion 20h. The tip of the screwed lock pin 211 is strongly pressed against the outer peripheral surface of the flat head of the adjusting screw 205. As a result, the cutting amount of the cutting rotary blade 14 toward the bead a is fixed. The measurement of the notch amount is finely measured by the value of the height of the scale collar 209 projecting from the bottom surface of the depression 20e and the value of the scale of the name plate 207 indicated by the arrow of the arrow plate 210. In FIGS. 1, 5, and 6, 20 i is a single long strip in the X direction that is engraved on the widthwise intermediate portion of the upper bogie unit 20 in accordance with the protrusion of the bead a and the overlaid portion b. It is a guide groove.

Next, the side running roller 201 and the roller interval adjusting means 202 will be described in detail with reference to FIGS. As shown in FIGS. 7 to 10, X is provided between the lower running rollers 43 and 44 on both sides of the lower bogie unit 19.
A roller mounting block 213 that is long in the direction is provided movably in the Y direction via a roller interval adjusting unit 202. A pair of side running rollers 201 are respectively supported on the outer surfaces of both ends in the length direction of the roller mounting block 213 with their respective axial directions directed in the Z direction. Hereinafter, the inter-roller adjusting means 202 will be described in detail. As shown in FIG. 7, an intermediate portion between the lower running rollers 43 and 44 of the lower bogie portion 19 has a long through hole 19 f extending in the Y direction through both side surfaces of the lower bogie portion 19. Are drilled. A pair of sleeves 214 is fitted inside from both ends of the through hole 19f to the vicinity of the center. In addition, a pair of bearings 215 are fitted in the central portions of the through holes 19f so as to abut against the distal ends of the sleeves 214, respectively. Double bearing 2
A central portion of one long bolt 216 extending in the Y direction is rotatably supported at 15. This bolt 216
At both ends of the two external threads 2
16a and 216b are engraved. Further, hexagonal heads 216c and 216d extending in the Y direction are provided on both end surfaces of the bolt 216, respectively. Elongated cylindrical nuts 217a and 217b are inserted into the respective sleeves 216a and 216b so as to be freely inserted into and removed from the corresponding sleeves 214, respectively. Further, the outer surfaces of the cylindrical nuts 217a and 217b are fixed to the back surfaces of the intermediate portions in the longitudinal direction of the pair of roller mounting blocks 213 via respective flanges 217c and 217d. The cylindrical nuts 217a and 217a corresponding to the intermediate portions in the length direction of each roller mounting block 213, respectively.
17b through hole 21 extending in the Y direction communicating with the inner screw hole
3a and 213b are drilled.

Therefore, the roller interval adjusting means 20
2, the side running roller 20 is adjusted to the diameter of the column.
In the case of adjusting the distance between the first through holes 213b (2
13a), a socket gauge 218 finely graduated along the axial direction is inserted into the outer peripheral surface, and its tip is externally fitted to the hexagonal head 216d (or 216c) of the bolt 216. The base of the socket gauge 218 is connected to the ratchet handle 219. Thereafter, by swinging the ratchet handle 219 about the axis of the bolt 216, the bolt 216 rotates in a predetermined direction via the socket gauge 218.
As a result, the pair of cylindrical nuts 217a and 217b screwed to the outer threads 216a and 216b, respectively, in which the bolts 216 are threaded in opposite directions, move inward or outward in the Y direction. Thereby, the interval between the corresponding side running rollers 201 is adjusted. In addition, the interval between the both side running rollers 201 is a through hole 213b (or 213a).
Can be measured by the scale of the socket gauge 218 pointed to by the outer end of. In this embodiment, the gap between the side running roller 201 and the inner surface of the column 11 is equal to or larger than the dimensional change of the column diameter (1 to 1).
(About 3 mm). This prevents the side running roller 201 from abutting on the inner surface of the column 11 to prevent the bogie from running.

Next, the inner surface cutting operation of the column 11 by the column inner surface cutting device 10 according to one embodiment of the present invention will be described. Prior to this operation, as shown in FIGS. 11 and 12, the device insertion guide rail 82 extending in the X direction is provided to the end of the column 11 on the device insertion side via a first clamp jig K1 of a manual type. Is clamped with one end of the butt. As shown in FIGS. 13 and 14, the device discharge guide rail 82A extending in the X direction is provided at the end of the column 11 on the device discharge side via a manual second clamp jig K2.
Is clamped with one end of the butt. The guide rail 82 for inserting the device is a gutter-like member having an open upper surface and both end surfaces.
Is a gutter-like portion having an abutting end portion having a rectangular tube portion 82a having substantially the same cross-sectional shape as the column 11, and having other portions opened at the top and both end surfaces similarly to the device insertion guide rail 82. This is the rail that became 82b.

The former first clamp jig K1 has a gate-shaped clamp main body 86 having a structure in which upper ends of a pair of side clampers 83, 84 are connected by a girder portion 85.
Each of the side clampers 83 and 84 is an L-shaped plate member, and sandwiches the butted portion between the column 11 and the device insertion guide rail 82 from the Y direction. A screw hole 85a is formed in the center of the intermediate portion of the girder portion 85, and a clamper operation screw 86a is screwed into the screw hole 85a. A handle 87 is fixed to the upper end of the clamper operation screw 86a. On the other hand, an upper clamper 88 pressed against the upper surface of the end of the column 11 is attached to the lower end of the clamper operation screw 86a via a cushioning material 88a so as to be able to move up and down. The upper clamper 88 moves up and down by rotating the handle 87. A small handle 89 is attached to the lower end of one of the side clampers 83 so as to insert and remove a pressing projection 90 whose tip is pressed against the side plate of the column 11. By rotating this small handle 89,
The butted portion of the column 11 and the guide rail 82 for device insertion is firmly held by both side clampers 83 and 84 to be integrated.

The second clamp jig K2 is
A pair of upper positioning projections 91 each having an original portion fixed on both sides of the end of the square tube portion 82a on the butted side and each end portion protruding outward, and the square tube portion 82a
And a pair of side clampers 92 and 93 each having a trapezoidal sideways view as viewed from the side, which are fixed to the ends of the two side plates on the butted side, and each of which protrudes outward. A small handle 94 is attached to the tip of the side clamper 93. The small handle 94 is fixed to an outer end of a clamper operating screw 95 extending in the Y direction. A tip of the small handle 94 is attached to an inner end of the clamper operating screw 95 by one end of the guide rail 82A for discharging the apparatus. A pressing projection 96 that is pressed against the side plate is provided. When connecting the device discharge guide rail 82A and the column 11, the upper positioning protrusion 91 and the side clampers 92 and 93 serve as guides, and one end of the device discharge guide rail 82A is connected to one end of the column 11. Match. Thereafter, the small handle 94 is rotated so that the pressing projection 96 projecting from the inner surface of the side clamper 93 is projected. Thus, one end of the column 11 is strongly pressed against the other side clamper 92. As a result, the device discharge guide rail 82A is firmly held in a state of abutting against the column 11 via the both side clampers 92, 93.

Thus, the guide rail 82 for inserting the device and the guide rail 82 for discharging the device are provided at both ends of the column 11.
When the setting of A is completed, as shown in FIG.
Is mounted, and the inner surface of the column 11 is cut.
In performing this cutting operation, first, as described above, the cut amount adjusting screw 205 is rotated by a predetermined amount in a predetermined direction by a ratchet handle (not shown). By adjusting the degree of screwing of the adjusting screw 205 into the cut amount adjusting nut 206, the cut amount of the cutting rotary blade 14 into the bead a and the overlaid portion b is adjusted (see FIGS. 5 and 6). Thereafter, the output shaft of the rotary motor 15 is rotated, and this rotational force is transmitted to the second power transmission system 23.
And transmitted to the cutting rotary blade 14. Thereby, the cutting rotary blade 14 rotates around the axis. At the same time, the output shaft of the traveling motor 13 is rotated. This rotational force is transmitted to the lower traveling roller 4 via the first power transmission system 22.
3, 44 and upper traveling rollers 53, 54,
As these rollers 43, 44, 53, and 54 roll on the inner surface of the lower plate of the guide rail 82 for inserting the device, the column inner surface cutting device 10 causes the guide rail 82 for inserting the device to move as shown by the arrow in FIG. , And travels along the X direction from the inside of the pipe of the column 11 (see FIGS. 1 and 9). Thereby, the bead a formed on the inner surface of the welded portion of the column 11 and the overlaid portion b around the bead a are continuously cut off by the rotating cutting rotary blade 14 (see FIG. 15).

The cut bead a and the overlaid portion b become fine chips, and are sequentially passed through a chip discharge port 78, a chute 80, and a chip introduction guide plate 79 while being prevented from scattering around by an annular brush 74a. The chip is stored in the chip storage portion 81 of the chip bucket 21. The other brushes 19c, 19d, and 21b also prevent chips from scattering in the column 11. After the cutting operation, the column inner surface cutting device 10 automatically transfers from the other end of the column 11 to the device discharging guide rail 82A. As described above, the column inner surface cutting device 10 is run in the pipe of the column 11 while the cutting rotary blade 14 is pressed against the bead a and the overlaid portion b. a and the overlaid portion b can be automatically cut off. In the conventional cutting operation of the inner surface of the column 11, only the cutting of the bead a having a small width is performed because the cutting tool is used. On the other hand, in this embodiment, the cutting rotary blade 14 having a large cutting area is employed, so that the bead a and the surrounding overlaid portion b can be removed at the same time. As a result, the smoothness of the inner surface of the column 11 can be improved.

Further, since the cutting edge of the cutting rotary blade 14 is pressed against the bead a and the overlaid portion b by the cylinders 17 and 17A in accordance with the diameter of the column 11, even if the columns have different diameters, there is no problem. Bead a, overlay b
Can be resected. That is, for example, in the case of a column 11A of □ 400 mm, as shown in FIGS.
The rods 17a, 1 of these air cylinders 17, 17A are
7b is further projected, and the cutting rotary blade 14 is raised to the bead a and the overlaid portion b of the column 11A until the cutting edge surface is pressed. Thus, the column inner surface cutting device 1
0 is expanded in the Z direction. The subsequent cutting operation of the bead a and the overlaid portion b is as described above. At this time, the rods 17a, 17b of the air cylinders 17, 17A are
Is a state in which some strokes are left. this is,
This is for absorbing the dimensional change of the column 11A during traveling of the self-propelled carriage 12 in the remaining portion of the stroke of the rods 17a and 17b. This is the same for the column 11. Furthermore, since the cut amount of the cutting rotary blade 14 is adjusted by the cut amount adjusting means 200, the bead a and the overlaid portion b can be cut without excess or shortage according to the projecting state of the bead a or the like. . The distance between the side running rollers 201 is adjusted by the roller distance adjusting means 202 according to the diameter of the column 11A. Thereby, even if the diameter of the column 11A is larger than that of the column 11 having the opening of 350 mm, the traveling of the self-propelled carriage 12 in the column can be stabilized with less rattling.

[0035]

According to the present invention, the self-propelled vehicle traveling in the pipe of the column is provided with the cutting rotary blade for cutting off the bead and the surrounding build-up portion. The overlay can be cut off automatically. In addition, the smoothness of the inner surface of the column can be improved.

In particular, according to the second aspect of the present invention, there is provided a rotary blade pressing means for pressing the cutting rotary blade against the bead or the built-up portion, and a cutting amount adjusting means for adjusting the cutting amount of the rotary cutting blade. Since it is provided, it is possible to cope with columns having different diameters, and moreover, it is possible to cut off the beads and the overlaid portions without excess and deficiency in accordance with the projecting situation.

According to the third aspect of the present invention, the side running rollers are arranged in pairs on the self-propelled vehicle and the roller gap adjusting means between the side running rollers is provided, so that regardless of the diameter of the column, The self-propelled trolley can run stably in the column.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a contracted state of a column inner surface cutting device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a column inner surface cutting device according to one embodiment of the present invention.

FIG. 3 is an enlarged vertical sectional view of a main part showing a transmission system of a running force of the column inner surface cutting device according to one embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a main part showing a peripheral portion of a cutting rotary blade of the column inner surface cutting device according to one embodiment of the present invention.

FIG. 5 is an enlarged plan view of a cutting amount adjusting means of the column inner surface cutting device according to one embodiment of the present invention.

FIG. 6 is an enlarged sectional view of a main part of a cutting amount adjusting means of the column inner surface cutting device according to one embodiment of the present invention.

FIG. 7 is an enlarged cross-sectional view of a main part showing that the interval between the side running rollers is being adjusted using the roller interval adjusting means of the column inner surface cutting device according to one embodiment of the present invention.

FIG. 8 is a perspective view showing an expanded state of the column inner surface cutting device according to one embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a column inner surface cutting device according to an embodiment of the present invention during a column inner surface cutting operation in a contracted state.

FIG. 10 is an explanatory diagram showing a column inner surface cutting operation in an expanded state of the column inner surface cutting device according to the embodiment of the present invention.

FIG. 11 is a longitudinal sectional view showing a state before starting column insertion of the column inner surface cutting device according to one embodiment of the present invention.

FIG. 12 is a rear view showing a connection state between the insertion guide rail of the column inner surface cutting device and the column according to the embodiment of the present invention.

FIG. 13 is a longitudinal sectional view showing a state of discharge from the column of the column inner surface cutting device according to one embodiment of the present invention.

FIG. 14 is a front view showing a connection state between a discharge guide rail of the column inner surface cutting device and the column according to one embodiment of the present invention.

FIG. 15 is an explanatory view showing a bead and a built-up portion of the bead using the column inner surface cutting device according to one embodiment of the present invention during a cutting and removing operation;

FIG. 16 is an explanatory view showing a bead and a built-up portion of the bead according to the conventional means during a cutting and removing operation.

[Description of Signs] 10 column inner surface cutting device, 11, 11A column, 13 traveling motor (traveling means), 12 self-propelled trolley, 14 cutting rotary blade, 15 rotary motor (rotating means), 17 air cylinder (rotary blade pressing) Means), 17A small-diameter cylinder (rotating blade pressing means), 201 side running roller, 202 roller interval adjusting means, 200 cutting amount adjusting means, a bead, b overlaid portion.

Claims (3)

[Claims] 1. A self-propelled vehicle traveling in a tube axis direction by a traveling means in a tube of a column which is a rectangular tube, a bead provided on the self-propelled vehicle and being a weld mark formed on an inner surface of the column, and a column. A column inner surface cutting device comprising: a cutting rotary blade for cutting off a built-up portion around a bead generated when butted end portions of the cutting blade are joined to each other; and a rotating means for rotating the cutting rotary blade. 2. A rotating blade pressing means for moving the cutting rotary blade to the bead side and pressing the cutting rotary blade against a bead and / or a build-up portion, wherein a bead and / or a meat of the cutting rotary blade is provided. The column inner surface cutting device according to claim 1, further comprising a cut amount adjusting unit that adjusts a cut amount of the embossed portion. 3. A roller for arranging a pair of side running rollers capable of contacting the inner surface of the column on both sides of the self-propelled vehicle, and adjusting an interval between the side running rollers corresponding to the self-propelled vehicle. The column inner surface cutting device according to claim 1 or 2, further comprising an interval adjusting means.