WO2019004164A1

WO2019004164A1 - Half-splitting cutting device and half-splitting cutting method

Info

Publication number: WO2019004164A1
Application number: PCT/JP2018/024108
Authority: WO
Inventors: ゴウ王; 孝雄峯岸; 智規永瀬; 山田　学
Original assignee: 株式会社日立プラントコンストラクション
Priority date: 2017-06-28
Filing date: 2018-06-26
Publication date: 2019-01-03
Also published as: KR102254410B1; CN110536768B; KR20190116356A; TW201904694A; CN110536768A; JP6388143B1; JP2019005884A; TWI665041B

Abstract

Provided is a half-splitting cutting device for cutting an object in half efficiently and in a short time. This half-splitting cutting device 10 is characterized by being provided with: a holder 20 for supporting an object 12 to be cut, the axis of which is disposed horizontally; a feeding stage 60 for attaching said holder 20 on a base 62; a movement means 80 for moving the feeding stage 60 forward and backward parallel to the axis of the object 12 being cut; and a cutting means 20 for cutting parallel to the axis of the object 12 being cut.

Description

Half cutting apparatus and half cutting method

The present invention relates to a half cutting apparatus and a half cutting method for cutting an object to be cut such as a large diameter pipe, a valve or the like into half.

In dismantling work at plant factories, piping, flanged piping, valves, etc. may be separated depending on the degree of contamination inside, such as reuse, storage and disposal.
For example, when examining the inside of piping contaminated with radioactivity, divide the piping in half (divided in parallel to the axis and have a semicircular end face) and place a measuring instrument such as a Geiger counter along the inner circumferential surface It measures and monitors pollution. Then, wastes with high contamination levels are stored in dedicated containers and stored in a stable stratum storage. On the other hand, wastes with low contamination levels are recycled and discarded as raw materials after melting after decontamination treatment.

Conventionally, such a half cutting operation has been performed using a cutting apparatus such as a melting or grinder cutting or a saver saw, a band saw or the like.
The cutting using a melting or grinder has a problem that it takes labor and time to take measures because the dust carrying a radioactive substance is scattered in the air and the working environment is deteriorated.
On the other hand, as a cutting machine, Patent Document 1 discloses a cutting apparatus for cutting a small diameter metal pipe in half along its longitudinal direction.

Patent No. 4858022 gazette

However, the cutting device disclosed in Patent Document 1 supports the pipe by inserting one end of the pipe into the inlet guide device and inserting a support rod into the internal space of the other end of the pipe. In this state, the support rod is moved toward the band saw for cutting, and the small diameter pipe is a cutting object, and it can be applied to large diameter pipes, bent pipes, flanged pipes, valves, etc. Can not.

Therefore, in view of the problems of the prior art described above, it is an object of the present invention to provide a half cutting apparatus and a half cutting method for efficiently cutting half an object to be cut in a short time.
Another object of the present invention is to provide a half cutting apparatus and a half cutting method capable of cutting a pipe having a large diameter, a pipe with a flange, a pipe or a valve with a flange.

As a first means for solving the above problems, according to the present invention, in the case where the object to be cut is a pipe or a bending pipe, the cross-sectional axial center is disposed sideways so as to be on the same plane. Piping or bending consisting of a plurality of plates provided with one or more semicircular recesses supporting along the outer periphery of the piping or bending pipe below the parallel cut surface at the upper end with the main surface arranged vertically With a pedestal for pipes,
When the object to be cut is a flanged pipe or a valve, a first plate in which the flange surface or the connecting surface of the valve contacts one of the main surfaces, and a second plate in which the first plate is erected from the main surface A flanged pipe or a pedestal for a valve comprising a third plate erected from the other main surface of the first plate;
A main surface of the plate is vertically disposed on the upper surface side of the base, and U-shaped grooves into which both side surfaces and the lower surface of the plate fit, or a fixing jig for fixing the first plate A plurality of piping or bending pipes are attached to the U-shaped groove such that the opening surface of the piping or bending pipe is along the direction orthogonal to the advancing or retreating direction or the advancing or retreating direction, the opening surface of the flanged piping or valve A feedhead attached to the fixing jig with a pedestal for the flanged piping or valve so that the direction is perpendicular to the advancing / retracting direction or along the advancing / retracting direction;
Attached to the pedestal for the pipe or bent pipe and attached to the upper end of the plate or to the pedestal for the flanged pipe or valve, the object to be cut can be clamped and fixed to the main surface of the first plate Fixing means,
Moving means for advancing and retracting the feed stand parallel to the cross-sectional axial center of the object to be cut;
Cutting means for cutting parallel to the cross-sectional axial center of the object to be cut;
Providing a half cutting apparatus characterized by comprising:
According to the first means, the cutting time can be significantly shortened by supplying the cutting object whose axis is arranged horizontally (horizontally) to the cutting means arranged parallel to the axis and cutting it.
Further, the object to be cut can be easily cut out of a straight pipe, a bent pipe, a pipe with flange or a valve or the like.

As a second means for solving the above problems, according to the present invention, in the first means, a fixing means capable of detachably attaching the object to be cut to the pedestal is provided. To provide.
According to the second means, the object to be cut during movement or cutting does not shift in position on the pedestal.

As a third means for solving the above-mentioned problems, according to the present invention, in the first or second means, the feed stand is arranged by arranging a plurality of mounts to which the mounts can be attached and detached along the advancing / retracting direction. Another object of the present invention is to provide a half cutting apparatus characterized by the above.
According to the third means, the pedestal can be inserted from above the carriage and positioned and fixed at a desired interval in accordance with the dimensions of the object to be cut.

As a fourth means for solving the above-mentioned problems, in the present invention according to any one of the first to third means, in the case where the object to be cut is a column,
The present invention is to provide a half cutting apparatus characterized in that the receiving base is a plate provided with one or more recesses for supporting the lower side along the outline below the cutting plane parallel to the axis of the object to be cut. It is in.
According to the fourth means, the object to be cut of the column whose axis is arranged horizontally is brought into contact with the cutting surface below the cut surface to prevent the interference between the saw blade and the pedestal, and the object to be cut whose axis is arranged horizontally It can be supported so that there is no hindrance to the half cutting operation. Also, the object to be cut can be stably attached or removed on the slide.

As a fifth means for solving the above-mentioned problems, according to the present invention, in the fourth means, the pedestal contacts the upper end of the recess toward the object to be cut facing from the recess and contacts An object of the present invention is to provide a half cutting apparatus characterized in that a vibration preventing portion is provided.
According to the fifth means, the contact between the object to be cut and the pedestal becomes strong by the simple operation of inserting the object to be cut into the recess, and the vibration of the object to be cut during movement or cutting can be reliably prevented.

As a sixth means for solving the above-mentioned problems, in the present invention according to any one of the first to third means, in the case where the object to be cut is a pipe,
The receiving stand is a plate provided with one or more semicircular recesses supporting the lower side along the outer periphery below the cutting plane parallel to the axis of the object to be cut, It is to do.
According to the sixth aspect of the invention, by contacting the cutting object whose axis is arranged horizontally below the cutting surface below the cutting surface, interference between the saw blade and the pedestal is prevented, and the axis is divided by half of the cutting object arranged horizontally It can be supported so that there is no hindrance to the cutting operation. Also, the object to be cut can be stably attached or removed on the slide.

As a seventh means for solving the above problems, according to the present invention, in the means of any one of the third to sixth means subordinate to the second or second aspect, the fixing means is provided on the main surface of the plate. It has an attached base and an arm rotatably connected to the base, and the tip of the arm can be rotationally moved to the inside of the opening of the object to be cut in contact with the inner circumferential surface of the object to be fixed An object of the present invention is to provide a half cutting apparatus characterized by the present invention.
According to the seventh means, the shaft can be fixed to the pedestal so as not to interfere with the half-cutting operation of the object to be cut, which is disposed laterally. Further, the object to be cut can be reliably fixed to the receiving table by a simple operation of rotating the fixing means.

As an eighth means for solving the above-mentioned problems, the present invention is characterized in that, in the means described in any one of the fourth to seventh ones depending on the third or the third, the attaching portion is formed on the base It is a U-shaped groove which inserts and fixes the above-mentioned pedestal vertically from the opening of the upper surface,
It is an object of the present invention to provide a half cutting apparatus characterized in that the U-shaped groove is formed in a direction perpendicular to the advancing and retracting direction.
According to the eighth means, the pedestal can be inserted from above the carriage and positioned and fixed at a desired interval in accordance with the dimensions of the object to be cut.

As a ninth means for solving the above-mentioned problems, the present invention is characterized in that, in any one of the first to eighth aspects, the feed stand comprises:
It is an object of the present invention to provide a half-cut apparatus characterized in that a half-cut presser supported by a presser plate protruding from the side of the object to be cut after cutting is provided.
According to the ninth means, the object to be cut on the upper side after cutting can be prevented from falling from the pedestal, and the safety of the operator can be secured.

As a tenth means for solving the above problems, according to any one of the first to third means, the present invention relates to the case where the object to be cut is a flanged pipe or a valve.
In the pedestal, a flange surface or a connecting surface of a valve is in contact with one main surface, and the main surface faces the fastening surface of the flange surface or the connecting surface of the valve and a first slit passing through the main surface A first plate having a second slit facing the saw blade of the cutting means and penetrating the main surface;
A second plate in which the first plate is erected from the main surface;
A third plate erected from the other main surface of the first plate;
It is providing the half cutting apparatus characterized by being.
According to the tenth means, attachment and removal of the flanged piping or valve for cutting the shaft in the horizontal direction, and the half cutting operation can be performed efficiently.

As an eleventh means for solving the above problems, the present invention according to any one of the first to tenth means, wherein the moving means drives a gantry, a pinion on an upper surface of the gantry, and the pinion. Drive motor, and
The feed stand includes a rack along a direction to move forward and backward to the lower surface of the base, and can move forward and backward with the meshing structure of the pinion and the rack by driving the drive motor on the mount. It is in providing a half cutting apparatus.
According to the eleventh means, the object to be cut can be supplied automatically to the cutting means and cut efficiently.

As a twelfth means for solving the above problems, the present invention relates to the eleventh means,
The moving means comprises an anti-vibration rail on the top surface of the cradle;
The slide table may be provided with a slider fitted on the lower surface of the base on the lower surface of the base so as to be slidable in the longitudinal direction of the vertical rail.
According to the twelfth means, it is possible to prevent the rolling of the feed stand during the advancing and retracting movement (during the cutting operation) to reduce the load on the saw blade, and to cut efficiently.

As a thirteenth means for solving the above problems, according to the eleventh or twelfth means of the present invention, the gantry arranges the first and second gantrys in an advancing / retracting direction sandwiching the cutting means therebetween,
It is an object of the present invention to provide a half-cut apparatus characterized in that a plurality of the feed stands which are moved in the advancing and retreating directions on the first and second mounts are provided.
According to the thirteenth means, it is possible to perform setup such as attachment or removal of another object to be cut during the cutting operation, and immediately supply the next object to be cut after the cutting operation, and the operation of cutting by half Operation efficiency can be improved without losing time.

As a fourteenth means for solving the above problems, according to the present invention, in the case where the object to be cut is a pipe or a bending pipe, the cross-sectional axial center is disposed sideways so as to be on the same plane. The pipe or bend having a plurality of plates provided with one or more semicircular recesses supporting along the outer periphery of the pipe or bend pipe below the parallel cut surface at the upper end where the main surface is vertically arranged With a pedestal for pipes,
When the object to be cut is a flanged pipe or a valve, a first plate in which the flange surface or the connecting surface of the valve contacts one of the main surfaces, and a second plate in which the first plate is erected from the main surface And a pedestal for the flanged pipe or valve consisting of a third plate erected from the other main surface of the first plate, with the main surface of the plate vertically arranged on the upper surface side of the base The opening face of the pipe or the bending pipe moves forward or backward on a U-shaped groove in which both side surfaces and the lower surface are fitted or a feed jig provided with a plurality of fixing jigs for fixing the first plate at predetermined intervals orthogonal to the advancing and retracting direction. Attach the pedestal for the pipe or bent pipe to the U-shaped groove along the direction orthogonal to or backwards or backwards, and the opening surface of the flanged pipe or valve follows the direction or forward or backward orthogonal to the advancing or retreating direction And attaching the cradle for sea urchin the flanged pipe or valve to said fixture,
Attach to the pedestal for the piping or bending pipe and attach it to the upper end of the plate or to the pedestal for the flanged piping or valve, and clamp and fix the object to be cut on the main surface of the first plate Process,
Moving the feed table attached with the receiving block in parallel with the cross-sectional axial center of the object to be cut;
Cutting the object with a cutting means with the saw blade turned laterally;
Providing a half cutting method characterized by having:
According to the fourteenth means, the cutting time can be significantly reduced by supplying and cutting one or more objects to be cut arranged horizontally (horizontally) with the cutting means arranged parallel to the axis .
Further, the object to be cut can be easily cut out of a straight pipe, a bent pipe, a pipe with flange or a valve or the like.

According to the invention it is possible to cut while feeding the saw blade to the laterally arranged cutting means. Therefore, it is possible to cut in half efficiently in a short time, and the operation efficiency is good.
Further, even if the object to be cut has a shape of a large diameter pipe, a bent pipe, a pipe with a flange, a valve or the like, it is possible to flexibly cut in half by using a corresponding pedestal.

It is a top view of the half cutting apparatus of this invention. It is a front view of the half cutting apparatus of this invention. It is a right side view of a half cutting device of the present invention. It is an explanatory view of a stand and a feed stand for straight pipes. It is explanatory drawing of a semicircular recessed part and a vibration prevention part. It is explanatory drawing of the fixing jig for piping. It is an explanatory view of a stand and a feed stand for bending pipes. It is an explanatory view of a stand and a feed stand for straight pipes and bending pipes. It is explanatory drawing of the pedestal and feed stand for flanged piping or valves. It is explanatory drawing of a pedestal for flanged piping or valves. It is explanatory drawing of the flanged piping or valve receptacle which attached the valve | bulb. It is explanatory drawing of a movement means. It is explanatory drawing of a half cutting holder. It is explanatory drawing of the half cutting apparatus of a modification.

Embodiments of the half cutting apparatus and the half cutting method of the present invention will be described in detail below with reference to the accompanying drawings.
The object to be cut 12 according to the present invention is a metal pipe (a straight pipe or a bent pipe (a shaft whose axis is on the same plane) of a column), a flanged pipe, a valve or the like.
In the present invention, “half cutting” means that a saw blade of cutting means is disposed on a straight line passing through the axis of the object to be cut parallel to the axis (two divisions) to generate two cut products. .
After cutting, inspection of the inner surface becomes easy.

[Half cutting device 10]
FIG. 1 is a plan view of a half cutting apparatus according to the present invention, and shows an example in which three straight pipes are cut side by side. FIG. 2 is a front view of a half cutting apparatus of the present invention. FIG. 3 is a right side view of the half cutting apparatus according to the present invention, in which a state in which the cutting means is moved and set at the cutting position is shown by a two-dot chain line.

As illustrated, the half cutting apparatus 10 according to the present invention has a cutting means 20 capable of cutting the object to be cut 12 parallel to the axis, and a pedestal 40 for supporting the axis of the object to be cut 12 sidewise (FIG. 2), fixing means 50 (not shown in FIG. 2) capable of fixing the object to be cut 12 to the receiving stand 40, a feed stand 60 capable of attaching the receiving stand 40 to the base, and cutting means 20 for the feed stand 60. A moving means 80 (not shown in FIG. 1) for advancing and retreating is mainly configured.

[Cutting means 20]
The cutting means 20 is a means for cutting the object to be cut 12 whose axis is oriented in the horizontal direction (the longitudinal direction is horizontal) parallel to the axis, and in the present invention, a band saw is used as an example.
The band saw has an endless saw blade 22 (see FIG. 3) attached to a drive wheel and a driven wheel, and is attached to a transfer frame 24 (see FIGS. 1 and 2). Elevating means 26 (see FIG. 3) for moving the saw blade 22 in the vertical direction is attached to the frame 24. The lifting means 26 is used for maintenance of the cutting means 20 and for avoiding contact with the object to be cut (except during cutting) moving on the mount. The band saw according to this embodiment is disposed so that the axis of the wheel is substantially horizontal and can be cut by the one side saw blade 22 that is wound, and the other side saw blade 22 is arranged above the object to be cut and cut The structure which does not contact with the later cutting object 12 is employ | adopted.
Further, the saw blade 22 at the time of cutting is disposed sideways, and can be cut along the axis of the object to be cut. The saw blade 22 at the time of cutting may be inclined as shown in FIG. 3 (in which the saw blade 22 revolves from the obliquely upper side to the lower side) as well as horizontal. In this case, the chips slip off the saw blade 22 and are easily discharged.

[Receiver 40]
FIG. 4 is an explanatory view of a stand and a feed stand for straight pipes. FIG. 5 is an explanatory view of the semicircular recessed portion and the vibration preventing portion. The receiving table 40 is a plate having a semicircular recess 42, which vertically arranges the main surface and supports the lower end along the outer periphery below the cutting plane parallel to the axis of the straight pipe 14 to be cut at the upper end. It is. The pedestal 40 supports the bottom of the straight pipe 14 whose axis is horizontal at a predetermined interval.
The saw blade 22 of the cutting means 20 runs along the axis of the object 12 to be cut, in other words, through the diameter, which becomes a half cut surface. The pedestal 40 supports below the cutting surface of the cutting means 20 not in contact with the saw blade 22. For this reason, the semicircular recess 42 is formed in an arc shape that is below the axis of the object to be cut 12 (for example, several tens of millimeters) and connects both ends of the chord parallel to the diameter of the object to be cut 12. At this time, the semicircular recess 42 is cut at a radius (for example, several millimeters) larger than the radius of the object 12 to be cut. Thus, the bottom side (lower side) of the object to be cut 12 can be fitted.

The receiving base 40 provided with the semicircular recess 42 having such a configuration contacts the cutting object 12 whose axis is arranged horizontally, with the cutting object 12 below the cutting plane, so that the axis of the cutting object 12 is arranged horizontally. It can be supported so as not to interfere with the cutting operation. Also, the object to be cut 12 can be easily attached or removed on the feed stand 60. The upper cutting object 12 which is divided in half is placed on the lower cutting object 12 and can be separated and taken out after cutting.
The object to be cut supported by the pedestal 40 can be cut even if it has a prismatic shape, in other words, a polygonal cross section. In this case, it is preferable to form a recess along the outer shape of the polygon. As an example, when a quadrangular prism is a cutting object and the cutting surface (saw blade position) is horizontal, the shape of the recess is a right-angled isosceles triangle. Also, the recess may be formed in the receiving table 40 so as to support one or a plurality of same or different shapes of cut objects.

[Vibration Prevention Unit 44]
If the object to be cut 12 is fitted in the semicircular recess 42, there is a risk that backlash may occur during forward / backward movement or cutting due to the design of the clearance (the semicircular recess 42 is formed by the radius of the object 12 plus several millimeters). is there. Therefore, the vibration prevention unit 44 is provided. The vibration preventing portion 44 is provided in the semicircular recess 42 of the cradle 40. The vibration preventing portion 44 protrudes from the semicircular recess 42 toward the object to be cut 12 at both upper ends of the semicircular recess 42. When the object to be cut 12 is attached to the semicircular recess 42, the distance between the tip of the vibration prevention unit 44 and the axis of the object to be cut 12 is set to coincide with the radius of the object to be cut 12. Such a vibration preventing portion 44 is integrally formed when cutting the semicircular recessed portion 42 of the pedestal 40, or is formed by overlay welding after the semicircular recessed portion 42 is formed, or the elastic member is bonded. And so on.
The vibration preventing unit 44 having such a configuration has a simple operation of inserting the object to be cut 12 into the semicircular recess 42 of the cradle 40, so that there is a portion in close contact with the object 12 to be cut. Vibration can be reliably prevented.

[Fixing means 50]
FIG. 6 is an explanatory view of a fixing jig for piping, which is a partially enlarged view seen from the direction orthogonal to the main surface of the pedestal 40. The fixing means 50 is a hardware jig for fixing the object to be cut 12 to the receiving table 40.
The fixing means 50 for piping (straight pipe or bent pipe without flange) comprises a base 52 and an arm 54.
The base 52 is attached so as to project from the main surface in the vicinity of the semicircular recess 42 of the pedestal 40. The tip of the base 52 is pin-connected to the arm 54. Further, the base 52 is provided with a fastening hole, and can be inserted into a fastening hole 55 of an arm 54 described later using a butterfly bolt 53 to prevent rotational movement.

The arm 54 is rotationally moved into contact with the inside of the opening of the object to be cut 12 from the main surface of the receiving table 40 with one end pinned to the base 52 as a fulcrum of rotation. A fastening bolt 56 is provided at the other end of the arm 54. The fastening bolt 56 tightens the fastening bolt 56 from the tip of the arm 54 fixed by the butterfly bolt 53 toward the inner peripheral surface of the lower object 12 to be cut, and the tip of the bolt contacts the object 12 to be disconnected. 12 can be gripped and fixed with the receiving stand 40.
Such fixing means 50 for piping is attached to a pedestal 40 that supports the vicinity of the opening surface of the object 12 to be cut. Further, the fixing means 50 for piping is mounted at a position below the cutting surface of the cutting object 12 when fixing the cutting object 12, in other words, at a position where the cutting surface and the arm 54 do not intersect. Can. As described above, the object to be cut 12 can be reliably fixed to the receiving table 40 by the simple operation of rotationally moving the fixing means 50.

[Feeder 60]
The feed stand 60 has a base 62 to which the receiving stand 40 is attached. The feed stand 60 is provided on the upper surface side of the base 62 with a U-shaped groove 63 serving as a mounting portion in which a receiving stand 40 whose main surface is vertical is fitted. A plurality of U-shaped grooves 63 are provided at predetermined intervals so as to be orthogonal to the advancing and retracting direction of the feed stand 60. The shape of the U-shaped groove 63 is formed on both side surfaces and the bottom surface of the facing feed stand 60 so as to form a U shape in which both side surfaces and the lower surface thereof are vertically fitted. Such a U-shaped groove 63 can be positioned and fixed at a desired interval according to the size of the object to be cut when the receiving table 40 is inserted from above the feed table 60. In one of the side surfaces of the U-shaped groove 63, a through hole penetrating along the advancing / retracting direction of the feed stand 60, a nut 67 whose axis coincides with the center of the through hole, and a fastening bolt 68 screwed with the nut 67 There are multiple. With such a U-shaped groove 63, the tip of the bolt abuts against the receiving block 40 by fixing the fastening bolt 68 to the nut 67 with respect to the receiving block 40 inserted into the U-shaped groove 63. it can.

The rack 64 and the slider 66 are attached to the lower surface of the base 62 of the feed stand 60 along the advancing and retracting direction (see FIG. 11 (2) described later).
The rack 64 is formed along the advancing and retracting direction so as to face the pinion 84 of the rack 82 described later. The rack 64 is engaged with the pinion 84, and the feed stand 60 moves back and forth according to the rotation of the pinion 84.
The sliders 66 are attached to both sides of the rack 64, in other words, to the bottom surface of the base 62 with the rack 64 interposed therebetween. The slider 66 is engaged with the anti-vibration rail 88, and the feed stand 60 slides along the longitudinal direction of the anti-vibration rail 88.

FIG. 7 is an explanatory view of a pedestal for a bending tube.
When the bending tube 16 is attached to the cradle 40, the open surfaces at both ends cross each other. When one opening is mounted along the main surface of the pedestal, the other opening surface intersects the main surface. Therefore, for the other opening surface, a pedestal 40 having a main surface along the opening surface is used. The fixing means 50 is similarly attached to the cradle 40 so that the bending tube 16 can be fixed to the cradle 40.
FIG. 8 is an explanatory view of a pedestal and a feeder for straight pipes and bent pipes. By providing the semicircular recess 42 for receiving the bending tube 16 and the semicircular recess 42 for receiving the straight tube 14 in one receiving base 40 as illustrated, the two types of cutting objects 12 can be cut simultaneously.
Thus, when the receiving base which formed the recessed part which supports several cutting objects of the same or different shape so that an axis | shaft may become on the same plane is fixed to a feed stand, several cutting is carried out by one cutting process. The object can be cut, and the working efficiency can be improved.

Fig. 9 is an explanatory view of a pedestal and a slide for a flanged pipe or valve, (1) is a plan view of the cradle and the slide, and (2) is a pedestal and a slide of the (1) The tool 61 is a view on arrow AA of FIG. FIG. 10 is an explanatory view of a flanged pipe or a pedestal for a valve, (1) is a front view, and (2) is a side view. FIG. 11 is an explanatory view of a flanged pipe having a valve attached thereto or a pedestal for the valve, (1) is a plan view, and (2) is a side view.
The pedestal 40A of the valve 18 includes a first plate 45 whose flange surface or connecting surface of the valve contacts one of the main surfaces, a second plate 46 in which the first plate 45 is erected from the main surfaces, and a first plate It consists of a third plate 47 erected from the other main surface 45 of the plate 45.

The first plate 45 is attachable to the feed table 60 with its main surface vertical, and has a first slit 451 (four in FIGS. 9 and 10) radially formed from the center of the main surface and a saw of the cutting means 20 A second slit 452 facing the blade 22 is provided. Each of the first and

second slits

451 and 452 penetrates from one main surface of the first plate 45 to the other main surface. Further, a nut 454 is provided on the first plate 45 at a position overlapping the fixing hole of the fixing jig 61 serving as the mounting portion of the feed stand 60 when the receiving stand 40A is mounted on the feed stand 60.
The second plate 46 is a plate orthogonal to the first plate 45. The second plate 46 is provided with a hanger 48 at one end in the longitudinal direction along the advancing / retracting direction of the feed stand 60 and a notch 461 at the other end. The first plate 45 is vertically connected (provided upright) from the side of the notch 461 of the main surface of the second plate 46.

A pair of third plates 47 are vertically connected (provided upright) on the other main surface of the first plate 45 (the side of the notch 461 of the second plate 46). The width and length of the third plate 47 and the length from the point where the first plate 45 is connected on the second plate to the end on the side of the notch 461 are set to the same length. Thus, when the main surface of the first plate 45 is arranged to be horizontal, the second plate 46 (on the side of the mounting bracket 48) vertically extends from the upper surface side, and the lower surface side is a pair of third plates 47; The 1st plate 45 is supported by the notch 461 side edge part of the 2nd plate 46 (refer FIG. 10 (1)).

A hanging bracket 48 is attached to the second plate 46. In addition, the third plate 47 is provided with a hanging hole 471 engaged with the hanging hook. The hangers 48 and the suspension holes 471 engage with chain hooks such as a chain block to lift the pedestal 40 and change the orientation of the plate (the main surface of the first plate 45 is made horizontal or the main of the second plate 46 It is used to level the surface).
Such a pedestal 40A can also be applied to flanged piping. When the second plate 46 is attached to the feed stand 60, the flange surface of the pipe is brought into contact with the main surface of the first plate 45 so that the axis is in the horizontal direction, and fixed to the first slit 451 by the fastening bolt 453. Can.
The fixing means (corresponding to the fixing means 50 used for fixing the pipe) used for fixing the flanged pipe or the valve 18 is a fastening bolt 453. After aligning the flange hole of the flanged pipe or the hole of the connection surface of the valve 18 so that it overlaps with the first slit 451 of the first plate 45, the flanged pipe or valve 18 is fastened using a fastening bolt 453. It can be fixed to the table 40A.

When the valve 18 is attached to the feed stand 60 using the mount 40A of the valve 18 having such a configuration, the mount 40A is temporarily placed so that the main surface of the first plate 45 is horizontal. Then, the connection surface of the valve 18 is placed on the main surface of the first plate 45. After adjusting the position so that the fastening hole of the connection surface and the first slit 451 coincide with each other, the valve 18 is fixed to the cradle 40A using a fastening bolt 453 as a fixing means. Subsequently, after hooking chain hooks such as a chain block to the hanging holes 471 of the third plate 47 and the hanging brackets 48 of the second plate, the cradle 40A is lifted and moved onto the base 62 of the feed table 60. On the base 62, the cradle 40A is placed on the base 62 so that the main surface of the second plate 46 of the cradle 40A is horizontal. At this time, the positions of the fastening holes of the nut 454 of the first plate 45 and the fixing jig 61 of the feed stand 60 are adjusted, and the fastening bolt 68 is screwed onto the nut 454 from the main surface side to which the connecting surface of the valve 18 is attached. The stand 40A is fixed to the feed stand 60. By this operation, it is possible to mount the valve 18 whose axis is turned on the feed stand 60.
The pedestal 40A for the flanged pipe or the valve 18 having such a configuration can efficiently perform installation and removal of the valve 18, which cuts the shaft in a horizontal direction, and a half cutting operation.

[Moving means 80]
FIG. 12 is an explanatory view of the moving means, (1) is a front view, (2) is a plan view, and (3) is an enlarged view of BB in (2). As shown in the figure, the moving means 80 mainly comprises a rack 82 on which the feed table 60 moving forward and backward is moved, a pinion 84 provided on the upper surface of the rack 82, a drive motor 86 for the pinion 84, and an antivibration rail 88. .
The mount 82 is composed of a front mount 821 and a rear mount 822 and is disposed near the center of the mount 82 below the saw blade 22 of the cutting means 20.
A pinion 84 is provided at the center of the upper surface of the mount 82. The pinion 84 is connected to a drive motor 86 provided on the side of the gantry. The rack 64 of the above-mentioned feed stand 60 is fitted to the pinion 84.

The vibration preventing rail 88 is provided along the longitudinal direction of the upper surface of the rack 82. The vibration preventing rails 88 are provided in a pair so as to sandwich the pinion 84 therebetween. The slider 66 of the above-mentioned feed stand 60 fits and slides on the vibration prevention rail 88. The vibration preventing rail 88 having such a configuration can prevent the lateral movement of the feed stand 60 during the forward and backward movement (during cutting operation), thereby reducing the load on the saw blade 22 and suppressing damage and wear, and efficiency Can be cut off.
The moving means 80 having such a configuration can automatically supply the object to be cut 12 to the cutting means 20 automatically and cut it efficiently.

[Half cutting holder 90]
The object to be cut 12 after cutting is in a state of being fixed to the pedestal 40 for the lower side of the object to be cut which has been cut in half. On the other hand, the upper half cut object is not fixed at all on the lower half cut object. Therefore, in the present invention, the half cutting and holding unit 90 is attached between the plurality of pedestals 40 attached to the feed stand 60, and the upper half cut target after cutting is supported from the side.
FIG. 13 is an explanatory view of the half cutting holder, (1) is a front view before cutting and a CC cross sectional view of the front view, and (2) is a front view during cutting and a DD cross section of the front view The figure, (3) is a front view after cutting and a sectional view taken along the line EE of the front view. A more detailed configuration of the half cutting and pressing portion 90 mainly includes a pressing plate 92, a bearing 94, a slope 96, and a pressing plate receiver 98.

The pressing plate 92 is insertable between the pedestals 40 and is a plate having substantially the same shape as the pedestals 40. The pressing recess 93 is formed at the upper end of the pressing plate 92 in the same manner as the semicircular recess 42 of the pedestal 40, but is deeper than the semicircular recess 42, in other words, the straight line connecting the upper ends is the pressing plate 92. It is set to be above the axis of the pipe 12 when the straight pipe 14 is supported. When the pressing recess 93 having such a configuration is mounted on the feed stand 60, a large gap does not occur between the lower portion of the straight pipe 14 supported by the receiving stand 40 to be in contact therewith.

The pressure plate 92 is provided with bearings 94 at the top of both side surfaces. The bearing 94 protrudes from both side surfaces along the main surface of the pressing plate 92 through the shaft 95. The main surface of the bearing 94 is disposed orthogonal to the main surface of the pressing plate 92, in other words, along the advancing and retracting direction of the feed stand 60. Further, on both side surfaces of the receiving stand 40, notches 49 are provided which protrude to the outside of the side surface of the bearing 94 when the pressing plate 92 is attached. The notch 49 has a length set downward from the upper end of the side surface of the receiving stand 40 to a predetermined depth. Here, the length of the notch 49 is set such that the upper end does not protrude from the side surface of the feed stand when the pressing plate 92 is attached. This does not intersect the cutting plane and does not hinder the cutting operation.
The slope 96 is attached to the saw blade cover 28 near the saw blade 22 of the cutting means 20. The slope 96 has a slope which inclines upward from the supply side to the discharge side in the cutting direction of the feed stand 60, and this slope is the same as that of the bearing 94 of the half cutting presser 90 attached to the feed stand 60 before cutting. It is set to almost the same height as the mounting position.

The holding plate support 98 is mounted below the cutout 49 on the side surface of the feed stand 60 to support the lower end corners of the holding plate 92. The holding plate support 98 serves as a support on which the lower ends of the lower ends of the half cutting and holding portion 90 protruding upward from the feed stand 60 rest while the bearing 94 moves upward along the slope of the slope 96.
The half cutting and holding portion having such a configuration can support the holding plate 92 by projecting the holding plate 92 above the cutting surface on the side of the object to be cut after the half cutting. Further, since the pressing plate 92 is disposed below the cut surface before cutting, the cutting operation can be performed without interference with the saw blade 22.
As a result, it is possible to prevent the drop of the object to be cut after cutting and to ensure the safety of the operator.

[Effect]
The operation of the half cutting apparatus of the present invention according to the above configuration will be described below.
When the straight pipe 14 and the bending pipe 16 are used as the object 12 to be cut, the plate-like support 40 is inserted into the U-shaped groove 63 in the feed stand 60 and fixed using a fastening bolt. The cradle 40 has semicircular recesses 42 along the outer periphery of the object 12 to be cut, and a plurality of main surfaces are attached at predetermined intervals in a direction orthogonal to the axis of the object 12 to be cut. Furthermore, the half cutting holder 90 is attached to the feed stand 60. Then, the object to be cut 12 is fixed to the receiving table 40. Specifically, after the object to be cut 12 is fitted in the semicircular recess 42 of the receiving table 40, the arm 54 of the fixing means 50 provided on the main surface of the receiving table 40 close to the opening surface is rotationally moved to open Contact the inside. Thereafter, both ends of the arm 54 are fixed using the butterfly bolt 53 and the fastening bolt 56.

Next, the feed table 60 is supplied to the cutting means 20 by the moving means 80. The cutting object 12 is cut in half by the cutting means 20. The half cutting and holding part 90 through which the cutting means 20 has passed protrudes upward from the upper surface of the receiving stand 40, and the upper part of the object to be cut 12 is fixed. As described above, the object to be cut 12 on the upper side can be supported by the half cutting and holding part 90, and there is no fear of falling, and the safety of the operator can be ensured.

When the flanged piping or valve 18 is the object to be cut 12, the flange surface of the valve 18 is the first plate 45 with the first plate 45 of the pedestal 40A being the bottom and the second plate 46 being vertical. On the main surface of the After the position adjustment is performed so that the flange hole and the first slit 451 coincide with each other, the fixing hole 453 is fixed. The pedestal 40A is moved onto the feed platform 60 by the chain block, and the pedestal 40A is placed on the base 62 so that the main surface of the second plate 46 of the pedestal 40A is horizontal. At this time, position adjustment of the nut 454 of the first plate 45 and the fastening hole of the fixing jig 61 of the feed stand 60 is performed, and the fastening bolt 68 is screwed from the main surface side to which the connecting surface of the valve 18 is attached. It fixes to the feed stand 60.
Next, the feed table 60 is supplied to the cutting means 20 by the moving means 80. The cutting object 12 is cut in half by the cutting means 20. The saw blade 22 after cutting stops the moving means 80 so as to stay within the second slit 452.

According to such a half cutting apparatus and a half cutting method, it is possible to cut while moving an object to be cut whose axis is arranged horizontally, and to efficiently cut the half in a short time to improve the operation efficiency. Can.
Further, in addition to a large diameter pipe, it is possible to easily cut even an object to be cut such as a flanged pipe or a valve.

[Modification]
FIG. 14 is an explanatory view of a half cutting apparatus according to a modification.
The half cutting apparatus 10A of the modified example differs from the half cutting apparatus 10 shown in FIG. The other configuration is the same, and thus the detailed description is omitted.
The gantry of the moving means is provided with a first gantry 831 on the supply side in the advancing / retracting direction with the cutting device 20 interposed therebetween, and a second gantry 832 on the discharge side. Each of the first and

second mounts

831 and 832 has an anti-vibration rail 88 continuous with the anti-vibration rail 88 of the moving means 80 on the top surface.
The feed stand 60 adopts a configuration in which a plurality of feed stands are arranged in the advancing and retreating direction, and the feed stand shown in FIG. 14 has a first feed stand 601 and two second feed stands 602 arranged.

The operation of the half cutting apparatus according to the modification of the above configuration will be described below.
In the same figure (1), the object to be cut 12 is attached to the first feed stand 601 on the first mount 831 on the supply side.
In the same figure (2), the cutting operation of the object to be cut 12 is performed while supplying the first feed stand 601 to the cutting means 20. During the cutting operation of the first feed 601, another object to be cut 12 is fixed to the second feed 602.

(3) After the cutting operation of the first feed stand 601 is completed, the first feed stand 601 is discharged to the second gantry 832. Subsequently, the second feed table 602 is supplied to the cutting means 20 to perform the cutting operation continuously.
The same figure (4) The cutting object 12 after the cutting | disconnection process on the 1st feeder 601 is removed during the cutting operation | work of the 2nd feeder 602, and the new cutting object 12 is attached.
In the same figure (5), after the cutting operation is completed, the second feeder 602 is moved to the second mount 832.
(6) After moving the cutting means 20 upward, the first and second feed stands 601 and 602 are moved backward from the second mount 832 to the first mount 831.
In the same figure (7), the cutting operation of the object to be cut 12 is performed while supplying the first feed stand 601 to the cutting means 20. During the cutting operation of the first feed stand 601, the object to be cut 12 after the cutting process of the second feed stand 602 is removed, and a new object to be cut 12 is attached. After that, repeat the work from (3) onwards.

According to the half cutting apparatus and the half cutting method of such a modification, another cutting object is attached or removed on the front and back pedestals during the cutting operation of the cutting object, and immediately after the cutting operation The next cut object can be supplied. Therefore, the loss of working time can be reduced to enhance the operation efficiency.

10, 10 A: half cutting device, 12: cutting object, 14: straight pipe, 16: bending pipe, 18: valve, 20: cutting means, 22: 22 Saw blade 24 24 frame 26 raising / lowering means 28 saw blade cover 40 40 A cradle 42 semi-circular recess 43 fastening hole 44 ...... Vibration preventing portion 45, ......... First plate, 451 ......... First slit, 452 ......... Second slit, 453 ......... Fastening bolt, 454 ......... Nut, 46 ......... Second plate , 461 ......... Notches 47 ......... Third plate 471 ......... Hanging holes 48 ......... Hanging brackets 49 ......... Notches 50 ......... Fixing means 52 ......... Base, 53 ......... Butterfly bolt, 54 ... ... Arm, 56 ... ... Fastening bolt, 60 ... ... Feeder, 601 ......... No. Feeder, 602: Second feeder, 61: Fixing jig, 62: Base, 63: U-shaped groove, 64: Rack, 66: Slider, 67: ...... Nut 68: Fastening bolt 80: Moving means 82: Mounting base 821: Front mounting base 822: Rear mounting base 831: First mounting base 832: First 2 Mounting frame 84: Pinion 86: Drive motor 88: Anti-vibration rail 90: Half cut and hold section 92: Holding plate 93: Holding section: 94 ............ Bearing, 96 ......... Slope, 98 ......... Presser plate holder.

Claims

When the object to be cut is a pipe or a bent pipe, the cross-sectional axis is arranged on the same plane with the cross-sectional axis horizontal, and the outer periphery of the pipe or the bent pipe below the cutting plane parallel to the cross-sectional axis A pedestal for a pipe or a bent pipe comprising a plurality of plates provided with one or more semicircular recesses to be supported along the upper end with the main surface arranged vertically;
When the object to be cut is a flanged pipe or a valve, a first plate in which the flange surface or the connecting surface of the valve contacts one of the main surfaces, and a second plate in which the first plate is erected from the main surface A flanged pipe or a pedestal for a valve comprising a third plate erected from the other main surface of the first plate;
A main surface of the plate is vertically disposed on the upper surface side of the base, and U-shaped grooves into which both side surfaces and the lower surface of the plate fit, or a fixing jig for fixing the first plate A plurality of piping or bending pipes are attached to the U-shaped groove such that the opening surface of the piping or bending pipe is along the direction orthogonal to the advancing or retreating direction or the advancing or retreating direction, the opening surface of the flanged piping or valve A feedhead attached to the fixing jig with a pedestal for the flanged piping or valve so that the direction is perpendicular to the advancing / retracting direction or along the advancing / retracting direction;
Attached to the pedestal for the pipe or bent pipe and attached to the upper end of the plate or to the pedestal for the flanged pipe or valve, the object to be cut can be clamped and fixed to the main surface of the first plate Fixing means,
Moving means for advancing and retracting the feed stand parallel to the cross-sectional axial center of the object to be cut;
Cutting means for cutting parallel to the cross-sectional axial center of the object to be cut;
A half cutting device characterized in that it comprises.
The pedestal for the pipe or the bending pipe is provided with a vibration preventing portion which protrudes and contacts the pipe or the bending pipe facing from the semicircular concave portion at both upper ends of the semicircular concave portion. The half cutting device according to 1.
In the case where the object to be cut is a pipe or a bent pipe,
The fixing means has a base attached to the main surface of the plate, and an arm rotatably connected to the base, and the tip of the arm is rotationally moved into the opening of the pipe or the bending pipe to move the cutting object The half cutting apparatus according to claim 1 or 2, which can be fixed in contact with the inner peripheral surface.
In the case where the object to be cut is a pipe or a bent pipe,
In the feeder,
The half cutting apparatus according to any one of claims 1 to 3, further comprising: a half cutting and holding portion supported by a holding plate protruding from the side of the pipe or the bent pipe after cutting.
In the case where the object to be cut is a flanged pipe or a valve,
The first plate has a flange surface or a connecting surface of a valve in contact with one of the main surfaces, and a first slit passing through the main surface and a saw blade of the cutting means and passing through the main surface The half cutting apparatus according to claim 1 having two slits.
The moving means includes a rack, a pinion on an upper surface of the rack, and a drive motor for driving the pinion.
The carriage is provided with a rack along the direction of forward and backward movement on the lower surface of the base, and can be moved forward and backward in the meshing structure of the pinion and the rack by driving the drive motor on the rack. The half cutting apparatus according to any one of Items 1 to 5.
The moving means comprises an anti-vibration rail on the top surface of the cradle;
The half cutting apparatus according to claim 6, wherein the feed stand is provided with a slider fitted to the anti-vibration rail on the lower surface of the base so as to be slidable in the longitudinal direction of the anti-vibration rail.
The mount places the first and second mounts in an advancing and retracting direction sandwiching the cutting means,
The half cutting apparatus according to claim 6 or 7, further comprising a plurality of the feed stands which move in the advancing and retreating directions on the first and second mounts.
When the object to be cut is a pipe or a bent pipe, the cross-sectional axis is arranged on the same plane with the cross-sectional axis horizontal, and the outer periphery of the pipe or the bent pipe below the cutting plane parallel to the cross-sectional axis A pedestal for the pipe or bent pipe having a plurality of plates provided with one or more semicircular concave portions to be supported along the upper end with the main surface vertically disposed;
When the object to be cut is a flanged pipe or a valve, a first plate in which the flange surface or the connecting surface of the valve contacts one of the main surfaces, and a second plate in which the first plate is erected from the main surface And a pedestal for the flanged pipe or valve consisting of a third plate erected from the other main surface of the first plate, with the main surface of the plate vertically arranged on the upper surface side of the base The opening face of the pipe or the bending pipe moves forward or backward on a U-shaped groove in which both side surfaces and the lower surface are fitted or a feed jig provided with a plurality of fixing jigs for fixing the first plate at predetermined intervals orthogonal to the advancing and retracting direction. Attach the pedestal for the pipe or bent pipe to the U-shaped groove along the direction orthogonal to or backwards or backwards, and the opening surface of the flanged pipe or valve follows the direction or forward or backward orthogonal to the advancing or retreating direction And attaching the cradle for sea urchin the flanged pipe or valve to said fixture,
Attach to the pedestal for the piping or bending pipe and attach it to the upper end of the plate or to the pedestal for the flanged piping or valve, and clamp and fix the object to be cut on the main surface of the first plate Process,
Moving the feed table attached with the receiving block in parallel with the cross-sectional axial center of the object to be cut;
Cutting the object with a cutting means with the saw blade turned laterally;
A half cutting method characterized by having: