JP6692548B2 - Cast iron material processing method and hole formation assisting jig - Google Patents

Description

  The present invention relates to a method for treating a cast iron material and a hole formation assisting jig. More specifically, a method of treating a cast iron material capable of safely breaking a cast iron material with low noise and low vibration, and efficiently and safely assisting a hole forming work performed accompanying the method of treating a cast iron material. It relates to a hole formation assisting jig.

  Conventionally, the treatment of the recovered cast iron material has been a problem among resource recovery companies. Generally, the recovered cast iron material is brought to the electric furnace steel mill for recycling, but due to the problem of melting time, the upper limit of the weight of the cast iron material that can be accepted may be limited to a maximum of 1 ton. Many. That is, it is necessary to treat the cast iron material that exceeds this weight so that it is less than 1 ton.

  As a treatment method for reducing the cast iron material exceeding 1 ton to less than 1 ton, for example, a method of cutting using a gas fusing machine can be considered. However, this method is not impossible to carry out, but unlike ordinary steel products, cast iron does not undergo a continuous chemical reaction due to oxygen, so that it takes a considerable working time for fusing. Therefore, it is difficult to say that applying this method to a cast iron material having a weight of more than 1 ton is practical considering the work load and cost of the operator.

  As an apparatus for efficiently processing such cast iron material exceeding 1 ton, there is an apparatus described in Non-Patent Document 1 below. The device described in Non-Patent Document 1 below is a 3,000-ton hydraulic automatic crusher having 11 special blades, and has the capability of processing large cast iron structures. According to this device, it is said that the cast iron material can be crushed safely and automatically.

Metrek Sangyo Co., Ltd. Main equipment 3000t (hydraulic) automatic crusher Internet <http://www.metrec.co.jp/main_equipment.html>

  However, the processing device of Non-Patent Document 1 is very large and expensive to install, so it is installed only at several places nationwide. Therefore, a person who wishes to use this processing apparatus must transport the cast iron material to be crushed to the facility where the apparatus is located, which takes time and effort. Further, since the transportation cost is added to the cost of using the device, the cost is also heavy, and there is a possibility that the cost of selling the cast iron material after the treatment may be unprofitable.

  On the other hand, as a method of treating a cast iron material that can be performed in the near field without using the treatment device of Non-Patent Document 1, for example, an iron ball (Monken) is used, and cast iron is generated by the impact force of a free-falling iron ball. There is a treatment method of crushing the material, or a treatment method of crushing the cast iron material by using a hydraulic breaker to hit the pinpoint.

  However, in the case of the treatment method using the iron balls, there is a risk that the dropped iron balls will bounce in an unexpected direction and the resulting crushed pieces will scatter over a wide area at high speed. In addition, this method is very difficult to implement in urban areas because of the large impact sound and vibration.

  Further, in the case of the processing method using the hydraulic breaker, although the vibration and impact are less than those of the above-mentioned processing method using the iron ball, the destructive force is inferior and the working time becomes long, and the striking sound continuously occurs during that time. It will be. And, even in this method, there is a risk that the crushed pieces are scattered. Therefore, this method is also very difficult to implement in urban areas.

  The present invention was created in view of the above points, and provides a method for treating a cast iron material, which is capable of safely breaking the cast iron material with low noise and low vibration in treating the cast iron material. The purpose is to It is another object of the present invention to provide a hole formation assisting jig that efficiently and safely assists the hole forming work performed in association with the method for treating a cast iron material.

  In order to achieve the above object, the method for treating a cast iron material of the present invention is to insert the action part of the expansion type crusher into the hole that the cast iron material has, and the expansion force in the radial expansion direction generated from the action part after the insertion. A breaking step of breaking the cast iron material is provided.

  Here, by inserting the working portion of the expansion type crusher into the hole of the cast iron material, the working portion can be brought into a operable state. After the insertion, the expansion type crusher is activated to expand the action portion in the radial direction.

  The outer surface of the action part can abut the inner wall of the hole of the cast iron material to apply an expansion force (stress in the radial expansion direction), and the applied force determines the limit value of the toughness of the cast iron material to be processed. When it exceeds, the fracture can be caused in the cast iron material starting from the hole.

As described above, according to the method for treating a cast iron material of the present invention, the cast iron material that is the object to be treated can be fractured by the above-described fracture step. And, since it is a method of causing breakage from the inside of the hole by the expansion force, compared with the conventional method of treating cast iron material,
(1) No impact noise is generated due to the use of iron balls, that is, it is possible to work with low noise,
(2) Collision due to the use of iron balls, etc. does not occur, that is, it is possible to work with low vibration,
(3) There is an excellent effect that scattering of fragments due to collision of iron balls or the like hardly occurs, that is, work can be performed safely.

  It should be noted that the fracture of the cast iron material includes, for example, any of the case of fracture into two or more lumps and the case of fracture in a partially connected manner. Further, the holes of the cast iron material include both existing holes and new holes.

  Further, when a hole forming step of forming a hole for inserting the action portion in the cast iron material is provided, the expansion type crusher can be used for the cast iron material by forming the hole.

  In addition, in the hole forming step, for example, in the case of forming an existing hole of a cast iron material into a shape or size into which the action portion can be inserted, when newly forming a hole into which the action portion can be inserted into the cast iron material, in either case Is also included. Further, the hole forming step is performed using a tool such as a drill or a reamer and a fusing machine having a lance pipe described later.

  As described above, the method for treating a cast iron material according to the present invention includes the above-described hole forming step, and for example, the case where the existing portion of the cast iron material is thin and the action portion cannot be inserted, or the action portion is inserted into the cast iron material. Even in the case where there is no hole to be formed, the hole can be formed in the cast iron material, and the expansion type crusher can be used for the cast iron material through the formed hole.

  Further, the hole forming step is performed by using a melting machine having a lance pipe and a hole forming auxiliary jig which is attached to the cast iron material and holds the lance pipe at a predetermined angle with respect to the cast iron material. In the operating state of, the peripheral wall portion that constitutes the hole formation assisting jig blocks the scattering or outflow of molten iron caused by the use of the fusing machine, and the inside of the peripheral wall portion is provided through the discharge portion provided in the peripheral wall portion. When discharging the generated liquid molten iron in a predetermined direction, the hole forming step can be performed efficiently and safely by using the above-described fusing machine and the hole forming auxiliary jig in combination.

  In this hole forming step, the work is performed on the cast iron material by using a fusing machine having a lance pipe that discharges high-temperature gas from the crater. By using this fusing machine, it is possible to form a hole of a desired size in a shorter time than the conventional hole forming work performed by a drill or the like, which is efficient, and the physical burden on the worker due to the shortened work time. Can also be reduced.

  On the other hand, when the above-described fusing machine is used, molten iron generated during the work may be scattered or flow out in an irregular direction, which may be dangerous to the worker. However, since the above-described hole formation assisting jig can shut off the molten iron that scatters on the peripheral wall, the possibility of accidents due to the scattered molten iron is reduced, and safe work can be performed. it can. In addition, since the molten iron is discharged from the peripheral wall portion only in the predetermined direction, the discharging direction is easy to predict, and it is possible to reduce the possibility of unexpected danger to the worker.

  Since the hole formation assisting jig described above can discharge liquid molten iron generated inside the peripheral wall portion in a predetermined direction through the discharge portion, high temperature molten iron generated by the work is discharged inside. It is possible to reduce the risk of damaging the hole formation assisting jig by not accumulating.

  By the way, unlike ordinary steel products, cast iron does not undergo a continuous chemical reaction due to oxygen, so that it takes time to form holes even with a fusing machine. Therefore, normally, in order to form a highly accurate hole having a predetermined depth, an operator must hold the lance pipe for a long time and continue to monitor the hole so that the direction of the hole is not bent. For this reason, this work imposes a heavy physical and mental burden on the worker, and also requires a high degree of skill.

  However, since the hole formation assisting jig described above can hold the lance pipe at a predetermined angle with respect to the cast iron material, the worker can hold the lance pipe in a predetermined position even though the lance pipe can be lightly supported. A hole that is held at an angle and has high precision can be formed.

  Further, in the case where a fracture guide wire forming step of forming a groove-like fracture guide wire connected to the opening edge of the hole is provided on the surface of the cast iron material, the formed fracture guide wire becomes a fragile portion (stress concentrated portion). As a result, the cast iron material can be easily broken in the direction along the breaking guide wire. This fracture guide wire forming step can be performed using a cutting tool such as a hand grinder, for example.

  The breaking guide line may be one, but it may be difficult to predict the breaking direction in a direction other than the direction in which the breaking guide line is formed. Therefore, for example, a second breaking guide wire may be formed so as to sandwich the hole, and in this case, the breaking guide wire can be set to break in two desired directions.

  In addition, the length of the breaking guide wire can be appropriately set, but for example, the breaking guide wire may be formed to have a length reaching the outer peripheral edge forming the contour of the cast iron material when viewed in the insertion direction of the action portion into the hole. .. In this case, the possibility of breakage occurring in the breakage process from the opening edge of the hole to the outer peripheral edge of the cast iron material increases. As a result, the fracture direction is accurately guided, the possibility that the cast iron material fractures in an unexpected direction can be reduced, and the fracture direction of the cast iron material can be set more accurately.

  As described above, the method for treating a cast iron material of the present invention includes the above-described fracture guide wire forming step, which makes it easier to fracture the cast iron material than when there is no fracture guide wire that is a fragile portion, and further, fracture. The cast iron material can be easily broken in the direction along the guide wire.

  In order to achieve the above object, the hole formation assisting jig of the present invention can be attached to a cast iron material that is an object to be processed, a contact portion with the cast iron material is opened, and liquid molten iron is scattered. Or, it has a peripheral wall that can block outflow, and the peripheral wall has a discharge part that can discharge liquid molten iron in a predetermined direction and a lance pipe of a fusing machine used for cast iron material at a predetermined angle. It comprises a main body portion in which a possible holding portion is formed, and an attachment structure portion arranged between the main body portion and the cast iron material and capable of attaching both members.

  Here, the hole formation assisting jig of the present invention can be attached to a cast iron material and used in combination with a fusing machine having a lance pipe. A hole can be formed in the cast iron material by operating the fusing machine with the crater at the tip of the lance pipe being in contact with the cast iron material through the opening of the main body.

  By the way, when performing hole formation using only the above-mentioned fusing machine, the molten iron generated during the work may be scattered, which may be dangerous to the operator. By using it, it is possible to block the molten iron that scatters on the peripheral wall portion. As a result, the possibility of accidents due to the molten iron that scatters is reduced, and the work can be performed safely.

  In addition, according to the hole formation assisting jig of the present invention, since the molten iron is discharged from the peripheral wall portion only in the predetermined direction, the discharging direction is easy to predict, which may cause an unexpected danger to the worker. It can be reduced.

  Further, since the hole formation assisting jig can discharge the liquid molten iron generated inside the peripheral wall portion through the discharging portion, the high temperature molten iron generated during the work is prevented from accumulating inside. The risk of damaging the hole formation assisting jig can be reduced.

  Note that unlike ordinary steel products, cast iron does not undergo a continuous chemical reaction due to oxygen, so it takes time to form holes even with a fusing machine. Therefore, normally, in order to form a highly accurate hole having a predetermined depth, an operator must hold the lance pipe for a long time and continue to monitor the hole so that the direction of the hole is not bent. For this reason, this work imposes a heavy physical and mental burden on the worker, and also requires a high degree of skill.

  However, according to the hole formation assisting jig described above, the lance pipe can be held at a predetermined angle with respect to the cast iron material (for example, approximately 90 ° with respect to the surface of the cast iron material). Although the work of lightly supporting the pipe is sufficient, the lance pipe can be held at a predetermined angle and a hole with high accuracy can be formed.

  Furthermore, since the hole formation assisting jig of the present invention has the above-mentioned attachment structure portion, the main body portion attached to the cast iron material can be attached so as not to move from that position. Further, the immovable state from this attachment position can further enhance the operational effects of the lance pipe holding portion (reducing the burden on the operator and improving the accuracy of the holes to be formed).

  As described above, the hole formation assisting jig of the present invention can efficiently and safely assist the hole forming work performed accompanying the method for treating a cast iron material.

  According to the method for treating a cast iron material of the present invention, the cast iron material can be safely broken with low noise and low vibration. Further, according to the hole formation assisting jig of the present invention, it is possible to efficiently and safely assist the hole forming work which is performed in association with the method for treating a cast iron material.

It is a figure explaining the processing method of the cast iron material in a 1st embodiment, (a) is a perspective view showing the cast iron material before work, and (b) is an explanatory view showing the cast iron material and an expansion type crusher during rupture work. , (C) are perspective views showing the cast iron material after fracture. It is explanatory drawing which showed an example of the adjustment material which fills up the clearance gap between the action part of an expansion type crusher, and the inner wall of a hole. The cast iron material processed by the processing method of the cast iron material in 2nd Embodiment is shown, (a) is a perspective view of the cast iron material which formed the break guide wire, (b) shows the AA arrow shown in (a). FIG. The cast iron material processed by the processing method of the cast iron material in the other example (modification 1) of 2nd Embodiment is shown, (a) is a perspective view of the cast iron material which formed the break guide wire, (b) is. It is a BB arrow sectional drawing shown in (a). It is a figure which shows the processing method of the cast iron material in 3rd Embodiment, (a) is a side view of the installation state of a cast iron material, (b) attached the hole formation auxiliary jig and the lance pipe of a fusing machine to the cast iron material. FIG. 3 is a perspective view showing a state, and FIG. 6C is a partially enlarged explanatory view showing a side view of the cast iron material during hole forming work. FIG. 6 is a hole formation assisting jig shown in FIG. 5, in which (a) is a perspective view of a discharging portion facing right front and (b) is a perspective view of a hanging portion facing left front. The cast iron material processed by the processing method of the cast iron material in the other example (modification 2) of 2nd Embodiment is shown, (a) before fracture | rupture, (b) after the 1st fracture | rupture, (c) FIG. 3B is a schematic plan view of each after the second break. The cast iron material processed by the processing method of the cast iron material in the other example (modification 3) of 2nd Embodiment is shown, (a) before fracture | rupture, (b) after the 1st fracture | rupture, (c) FIG. 3B is a schematic plan view of each after the second break. The cast iron material processed by the processing method of the cast iron material in the other example (modification 4) of 2nd Embodiment is shown, (a) before fracture | rupture, (b) after the 1st fracture | rupture, (c) FIG. 3B is a schematic plan view of each after the second break. The cast iron material processed by the processing method of the cast iron material in the other example (modification 5) of 2nd Embodiment is shown, (a) before fracture | rupture, (b) after the 1st fracture | rupture, (c) FIG. 3B is a schematic plan view of each after the second break.

  Embodiments of the present invention will be described in more detail with reference to FIGS. 1 to 10. It should be noted that the reference numerals in each drawing are attached within a range that reduces complexity and facilitates understanding. The following description will be given in the order of [First Embodiment], [Second Embodiment], [Modification 1], [Third Embodiment], [Modification 2]-[Modification 5].

  The cast iron material in each embodiment includes, for example, sinks of mooring buoys recovered from the sea, wastes such as aged molds, but is not limited to these, and cast iron ingots are used. I wish I had it. In addition, the target cast iron materials are mainly those having a weight of more than 1 ton, considering that the weight can be reprocessed at the electric furnace steelmaking (less than 1 ton) by the treatment. However, the cast iron material of less than 1 ton may be the target. Even if it is a lightweight cast iron material, if it is long and unsuitable for transportation or reprocessing, it may be a target to have an appropriate size (short length).

  The expansion type crusher used in each embodiment has an action portion having a thickness that can be inserted into a hole provided in a cast iron material, and ruptures the cast iron material by an expansion force in the radial direction generated from the action portion after insertion. As long as the structure is possible, the mode is not particularly limited. However, in consideration of low noise, low vibration, possibility of crushed pieces, work efficiency, cost, etc. during work, the wedge principle is applied to the action part (hereinafter referred to as “wedge”), and the advancing body is pushed out by hydraulic pressure. A hydraulic crusher (so-called packer, hereinafter referred to as "packer") that exhibits an expansion force of several tens to several thousand tons in the width direction due to the advance of the above is preferably used. The driving force of the packer is supplied by being connected to a hydraulic hose of a shovel car that suspends the packer (see FIG. 1B), but the driving force is not limited to this and may be, for example, another type. It may be a well-known device such as the hydraulic device, or a device or an instrument.

[First Embodiment]
A method for treating a cast iron material according to this embodiment will be described with reference to FIG. The cast iron material 1A shown in FIG. 1 (a) (which is an object to be processed and weighs about 1.5 tons) has holes 10 into which the wedges 21 of the packer 2 can be inserted (existing holes).

  Reference is made to FIG. The method for treating a cast iron material according to the present embodiment is such that a wedge 21 having a thickness that can be inserted into the hole 10 provided in the cast iron material 1A is inserted, and the wedge 21 after insertion is operated by power transmission from the packer 2, This is performed by a breaking step in which the cast iron material 1A is broken by the expansion force in the diameter expanding direction generated by the wedge 21.

  More specifically, when the wedge 21 after the insertion is operated by the power transmission from the packer 2 (arrow X in the downward direction in FIG. 1B), the diameter of the inner wall of the hole 10 increases in the radial direction (see FIG. The force is applied in the direction of arrow Y1 and Y2 of b). Then, when the cast iron material 1A exceeds the limit value of its toughness, it breaks in an instant and becomes two or more lumps 1A1 and 1A2 (see FIG. 1C).

  The lumps 1A1 and 1A2 of the cast iron material after breaking have a weight suitable for recycling (for example, each lump is about 750 kg). It should be noted that the wedge 21 is more preferable if it is operated gradually (gradually), since almost no fragments are generated at the time of breaking.

  According to the cast iron material processing method of the present embodiment, by using the packer 2, as compared with the conventional cast iron material processing method described above, there is no need for a large-scale facility or a large working machine tool. It is possible to safely perform processing work with low noise and low vibration.

For more details,
(A) Since the treatment method is performed by using the packer 2 and the cast iron material 1A breaks in an instant when the toughness limit is exceeded, noise generated compared to the conventional treatment method of the cast iron material is generated. And vibration are extremely small, and almost no fragments scatter around when breaking, so safety is high,
(B) Since it can be processed by a simple means using the packer 2, a large working machine tool is unnecessary,
(C) This is a treatment method that can be implemented on the operator's premises or in the facility and does not require transfer to a large-scale facility in a remote place. Therefore, the number of times that the cast iron material 1A is reloaded for transfer is reduced and repeated. It is possible to reduce the risk and work burden on the operator due to the transshipment work of
(D) If the transfer to a large-scale facility in a remote place is not necessary, the cost of long-distance transfer can be eliminated or reduced, and the consumption of fuel etc. can be reduced, which in turn suppresses the generation of greenhouse gases. It has excellent effects such as.

  In the present embodiment, the existing hole 10 in the cast iron material 1A can be used without processing. However, for example, the existing hole in the cast iron material is a hole unsuitable for work (for example, a small diameter in which the wedge 21 cannot be inserted). Hole), a hole forming step (hereinafter referred to as “existing hole processing step”) of processing an existing hole into a thickness into which the wedge 21 can be inserted may be performed as a pre-process.

  This existing hole processing step includes, for example, a mode in which the hole is expanded or shaped by an instrument such as a fusing machine having a lance pipe described later. By performing this step, the wedge 21 can be inserted. Further, when the shape of the inner wall of the hole is shaped so as to be along the outer peripheral surface of the wedge 21, the mutual contact area increases, and the stress applied from the packer 2 can be transmitted without loss, so there is a possibility of breaking at once. This will lead to a reduction in work time and improve work efficiency.

  Further, in the present embodiment, as described above, the existing hole 10 in the cast iron material 1A can be used without processing. For example, as shown in FIG. 2, the inner diameter of the existing hole 10a in the cast iron material 1a is When the outer diameter of the wedge 21 is larger than the outer diameter of the wedge 21, the insertable adjusting member 201 is inserted between the wedge 21 and the inner wall of the hole 10a to fill the gap, and the force generated from the wedge 21 is transmitted to the inner wall of the hole 10a without loss. Alternatively (see FIG. 2).

  As shown in FIG. 2, the adjusting member 201 has a half-split tube shape, and is a member formed of a material (for example, steel) having a rigidity that is not easily deformed by the stress from the wedge 21. The shape or structure is not particularly limited as long as the gap between the wedge and the inner wall of the hole is filled and the force generated by the wedge is transmitted to the inner wall of the hole.

[Second Embodiment]
A method for treating a cast iron material according to this embodiment will be described with reference to FIG. The method for treating a cast iron material according to the present embodiment includes forming a groove-shaped fracture guide wire 11b having a base end connected to the opening edge of the hole 10b on the surface of the cast iron material 1B provided with the hole 10b. Step, and insert a wedge having a thickness that can be inserted into the hole 10b provided in the cast iron material 1B, the wedge after insertion is operated by the power transmission from the packer, and the expansion force in the radial expansion direction generated from the wedge is applied. This is performed by a breaking step of breaking the cast iron material 1B. The breaking process is the same as that of the first embodiment described above, and therefore, illustration and description thereof will be omitted.

In the present embodiment, the fracture guide wire forming step is
(1) The outer peripheral edge of the cast iron material 1B that reaches from the hole 10b of the cast iron material 1B at the shortest distance (in other words, the closest distance) when viewed from the direction of insertion of the wedge into the hole (viewed from above in FIG. 3). Confirm where the position of (outer peripheral edge forming the contour of the cast iron material 1B) is, draft the two lines connecting the hole and the outer peripheral edge that is the shortest distance from the hole,
(2) Along the draft, a groove-shaped fracture guide wire 11b having a predetermined length (a short length of about 5 to 20 cm, depending on the size of the cast iron material) whose base end is connected to the opening edge of the hole 10b. It is performed by forming with a cutting tool such as a grinder.

  If the breaking process is performed on the cast iron material 1B without the breaking guide wire 11b, the breaking line normally occurs along the shortest distance to the outer peripheral edge of the cast iron material (the line whose fracture surface has the smallest area). However, at this time, there is a case where there is a fragile portion that cannot be observed from the outer surface inside the cast iron material, and it may fracture in an unexpected direction, and it is difficult to predict the exact fracture direction. In many cases, the cast iron material that has broken in an unexpected direction does not have a desired size (weight), and in this case, it is necessary to perform a work of breaking a large broken mass again, which is troublesome.

  However, according to the method for treating a cast iron material in the present embodiment, the formed fracture guide wire 11b becomes a fragile portion (stress concentrated portion), whereby the cast iron material 1B easily breaks in the direction along the fracture guide wire 11b. Become. As a result of the formation of the generally intended breaking line, the block of the cast iron material after breaking can be made into a substantially desired size (weight).

  As described above, although this process is a simple work, the cast iron material 1B can be fractured to a desired size by the addition of this process, so that the waste due to the re-work as described above can be omitted and the work efficiency can be reduced. Contribute to further improvement.

  Further, the breaking guide wire 11b is formed with a predetermined length along the line connecting the outer peripheral edge of the cast iron material 1B and the hole 10b, which is the shortest distance from the hole 10b of the cast iron material 1B, so that the breaking distance becomes the shortest. This is highly likely, and since the force required for breaking is small, work time is shortened, which also contributes to improvement in work efficiency.

[Modification 1]
Another example (Modification 1) of the second embodiment will be described with reference to FIG. In this modification, the breaking guide wire 11c is formed to have a length such that the tip thereof reaches the outer peripheral edge of the cast iron material 1C.

  That is, since the breaking guide wire 11c, which is a fragile portion (stress concentrating portion), has a length from the outer peripheral edge of the cast iron material 1C to the opening edge of the hole 10c, the direction of the breaking line that actually occurs (the cast iron material 1C is The breaking direction) can be set more accurately.

  As a result, the possibility that the cast iron material 11C breaks in an unexpected direction and becomes an undesired size is extremely reduced, and a broken mass of the cast iron material 1C having a desired size is obtained. Or, further improvement in workability can be expected as compared with the case of forming a short breaking guide wire.

[Third Embodiment]
A method for treating a cast iron material according to this embodiment will be described with reference to FIG. The method for treating a cast iron material according to this embodiment includes a hole provided in the cast iron material 1A and a hole forming step (hereinafter, referred to as a "drilling step") of newly providing a hole 10d for inserting a wedge in the cast iron material 1D. The wedge 21 having a thickness that can be inserted into 10 is inserted, the wedge 21 after the insertion is operated by the power transmission from the packer 2, and the cast iron material 1D is made to have two or more by the expansion force in the radial expansion direction generated from the wedge 21. Breaking into chunks is done by a breaking process.

  In addition, from the viewpoint of improving workability, it is more preferable to perform the same breaking guide wire forming step as that of the second embodiment and the modified example 1 on the hole 10d newly provided by the above-described punching step. Further, if the cast iron material 1D has existing holes, it may be replaced with an existing hole processing step.

  Since the breaking step and the breaking guide wire forming step are the same as those in the first embodiment, the second embodiment and the first modification described above, illustration and description thereof will be omitted, and only the description related to the punching step will be given. Further, since the work content of the existing hole processing step is the same as that of the punching step, illustration and description thereof will be omitted.

  The perforation step is performed using the fusing machine 3 having the lance pipe 31 and the hole formation assisting jig 4 attachable to the inclined upper surface of the cast iron material 1D. The hole formation assisting jig 4 has a function of blocking the scattering or outflow of the molten iron 12 generated by the use of the fusing machine 3, a function of discharging the liquid molten iron 12 generated inside in a predetermined direction, and And has a function of holding the lance pipe 31 at a predetermined angle. The specific configuration of the hole formation assisting jig 4 will be described later.

(1) Installation of cast iron material 1D The cast iron material 1D is placed so that the surface including the perforated portion (portion where the hole is to be opened) faces upward and is inclined. For example, the cast iron material collected from the site and transferred to the processing plant is lifted by a shovel car, placed on the H steel 8 or sleepers, and tilted (see FIG. 5A).

(2) Attachment of Hole Forming Auxiliary Jig 4 Determine the position of the cast iron material 1D to be drilled and mark it. Then, the hole forming auxiliary jig 4 is attached so as to cover the perforated portion by using the mark or the like as a mark. At this time, the hole forming assisting jig 4 attaches a portion (a discharging portion 43 described later) that exhibits a function of discharging the molten iron 12 toward the inclined downward direction of the cast iron material 1D.

  Then, the lance pipe 31 is held via the hole formation assisting jig 4. Specifically, the hole formation assisting jig 4 makes the tip of the lance pipe 31 face the piercing portion (reference numeral omitted), and the axial direction of the lance pipe 31 and the piercing portion are substantially at right angles (preferably Stand at right angles) and hold it.

(3) Start of perforation Open the valve, supply high-pressure oxygen from an oxygen cylinder (not shown) to the lance pipe 31, and ignite the crater to operate the fusing machine 3 to obtain a desired depth and hole diameter. A drilling operation is started in order to form a hole.

  In addition, it is preferable that the diameter of the formed hole is 103% or more and 110% or less of the maximum diameter portion of the wedge of the packer to be inserted. If it is less than 103%, it is not preferable because precision is required for the wedge insertion work, and if it exceeds 110%, it may be necessary to use the adjusting material, which is not preferable.

  Further, the hole for inserting the wedge is usually a through hole in the thickness direction of the cast iron material, but is not limited to this, for example, when a hole for inserting the wedge is newly provided, in the thickness direction of the cast iron material. When the distance is 100%, the distance from the opening edge of the hole to the hole bottom is preferably 50% or more and 85% or less. The packer has a structure that mainly exerts an expansion force in a direction intersecting the long axis of the wedge, and since the force in the extension direction (axial tip direction) of the long axis of the wedge is not large, the depth of the hole in the cast iron material If it is less than 50%, it is difficult to break, which is not preferable. On the other hand, when it exceeds 85%, it can be said that it is almost a through hole. Therefore, from the viewpoint of time efficiency and cost efficiency of the work, it is preferable to use a through hole as much as possible.

(4) Completion of drilling After forming the hole 10d having a desired size, the operation of the fusing machine 3 is stopped. After a lapse of a predetermined time, the cold hole formation assisting jig 4 is removed from the cast iron material 1D, and the solidified molten iron 12 is appropriately removed so as not to disturb the subsequent wedge insertion, and the drilling process is completed. In addition, as described in Modifications 2 to 5 described later, when a plurality of holes are required to break to an appropriate size, the above-described punching step is performed multiple times.

According to the perforation process by the steps (1) to (4) described above,
(A) While it is possible to form the hole 10d of a desired size with high accuracy in a short time in the cast iron material 1D, the burden on the operator is less than that of the conventional drilling work using a drill or the like.
(B) The possibility of the molten iron 12 splashing or flowing out in an irregular direction can be significantly reduced by the blocking function of the molten iron 12 that the hole formation assisting jig 4 has, and as a result, during work Can improve the safety of workers in
(C) Since the molten iron 12 having a high temperature is discharged to the outside by the discharging function of the molten iron 12 of the hole forming auxiliary jig 4, the hole forming auxiliary jig 4 is less likely to be damaged,
(D) Since the discharged molten iron 12 is attached to the hole formation assisting jig 4 in such a manner that the molten iron 12 flows down along the inclined surface, the discharge of the molten iron 12 from the hole formation assisting jig 4 is promoted. It is possible,
(E) The holding function of the lance pipe 31 of the hole formation assisting jig 4 can reduce the work load on the operator for holding the lance pipe 31 for a long time, and the lance pipe 31 is held so as not to move. The hole 10d with high accuracy can be formed.

  According to the method for treating a cast iron material in the present embodiment, by passing through the above-described punching step, a new appropriate hole is formed so that a wedge can be inserted into the cast iron material 1D, a drilling time is shortened by using a fusing machine, and a lance pipe is used. Efficient and safe perforation work is realized through the effects of reducing the physical burden of holding the steel, preventing the molten iron from scattering, and ensuring the safety of the worker by flowing it down only in a predetermined direction.

(Hole formation assisting jig 4)
A specific configuration of the hole formation assisting jig 4 will be described below with reference to FIGS. 5 and 6. The hole formation assisting jig 4 includes a main body portion 40 having a discharge portion 43 and a lance pipe 421, and an attachment structure portion provided in the main body portion 40.

  The body 40 is made of heat-resistant metal, and has a rectangular top plate 42 and three side plates 41 whose upper ends are connected to the top plate 42 (the top plate and the side plates are the above-mentioned "peripheral wall parts"). Corresponding to)). Then, the main body portion 40 has a structure in which the side opening portion constitutes the discharging portion 43, and the lance pipe 31 can be stood on the upper surface of the cast iron material 1D that appears in the opened bottom portion.

  In the present embodiment, the lance pipe holding portion 421 is a through hole formed in the center of the top plate 42 in the plate thickness direction, the lance pipe 31 can be inserted, and the lance pipe 31 after insertion is axially formed. It is provided with a hole diameter that does not shake (it becomes a steady rest).

  In the present embodiment, the main body is formed of a stainless steel material (SUS304) having a plate thickness of 8 mm, but the size and the material are not limited to this, and other kinds such as other kinds of metals or ceramics may be used. The material is not particularly limited as long as the material has rigidity enough to hold the lance pipe and heat resistance (preferably heat resistance of 700 ° C. to 1,000 ° C.).

In the present embodiment, the fixed structure portion is
(1) In the main body portion 40, the locking portion 44 which is a ring-shaped member fixed to the outer surface of the side plate 41 located behind the discharge portion 43,
(2) A magnet type holder 45 having a locking ring (reference numeral omitted) and capable of turning on / off the magnetic force of the built-in alnico magnet by switching the handle (reference numeral omitted).
(3) A wire 441 that suspends the main body 40 by interposing it between the locking portion 44 and the magnet type holder 45.

  The above-mentioned fixed structure portion can easily magnetically attach the magnet type holder 45 to an arbitrary portion of the cast iron material 1D. Further, since the wire 41 is provided between the main body 40 and the magnet type holder 45, the degree of freedom in positioning the main body 40 is high, and the main body 40 can be easily removed even after the punching work, which contributes to improvement in workability.

  The structure of the fixed structure is not limited to the one described above, and for example, a hook-shaped body formed in the main body and capable of being locked to the cast iron material is interposed between the main body and the cast iron material. Any structure may be used so long as the main body can be fixed so as not to move from the installation position.

  Further, in the present embodiment, the light red clay 46 (clay for ceramics) having heat resistance is interposed between the lower end of the side plate 41 and the surface of the cast iron material 1D to form an auxiliary fixing structure portion. The attachment of the light red soil 46 is effective in suppressing the installed main body 40 from moving laterally on the surface of the cast iron material 1D (rest is prevented) despite the work that is simple and inexpensive and can be performed quickly. )be able to.

  In the present embodiment, the light red soil is used, but the present invention is not limited to this. For example, clay or various clay for pottery such as ocher may be used, and similar properties (heat resistance, heat resistance, It can be replaced by another material having adhesiveness or plasticity.

  As compared with the conventional drilling work for a cast iron material, the hole formation assisting jig 4 can efficiently and safely assist the hole forming work that accompanies the method for processing a cast iron material.

The hole formation assisting jig 4 is
(A) By blocking the molten iron 12 that scatters by the partition wall composed of the side plate 41 and the top plate 42, it is possible to improve the safety of the worker during work,
(B) By discharging the high temperature molten iron 12 generated inside the main body portion 40 through the discharging portion 43 so as not to collect, the durability of the hole forming auxiliary jig 4 can be improved,
(C) Since the lance pipe holding portion 421 can hold the lance pipe 31 so as to stand on the perforated portion of the cast iron material 1D, it is possible to reduce the physical burden on the operator and to stand the lance pipe 31 at the perforated portion. In the holding state, it is possible to punch a hole 10d with a high precision and a predetermined depth,
(D) The main body 40 can be fixed so as not to move from the installed position by the fixing structure portion including the locking portion 44, and in addition, the main body portion 40 is perforated in cooperation with the lance pipe holding portion 421. The accuracy of the holes can be increased,
As a result, it is possible to efficiently and safely assist the hole forming work that is performed accompanying the method for treating the cast iron material, as compared with the conventional drilling operation for the cast iron material.

[Modification 2]
Another example (Modification 2) of the second embodiment will be described with reference to FIG. 7. In the present modification, the cast iron material 1E is a rectangular parallelepiped rectangular in plan view and is a cast iron material of about 3 tons. The cast iron material 1E includes a first breaking guide wire 11e1 formed on the surface to be processed in the width direction (horizontal direction in FIG. 7A) and a longitudinal direction (vertical direction in FIG. 7A). ), The second breaking guide wire 11e2 is formed.

  The first breaking guide wire 11e1 is formed so as to connect the long sides of the cast iron material 1E substantially in the longitudinal direction, and the first hole 10e1 is formed on the first breaking guide wire 11e1. .. The first hole 10e1 is formed slightly closer to one long side (the longer side on the left side in FIG. 7A) of the intersection of the first breaking guide wire 11e1 and the second breaking guide wire 11e2. ing.

  The second breaking guide wire 11e2 is formed so as to connect the respective short sides of the cast iron material 1E substantially in the longitudinal direction, and the second hole 10e2 and the third hole are formed on the second breaking guide wire 11e2. 10e3 is formed. The second hole 10e2 is formed at an intermediate position between the intersection of the first breaking guide wire 11e1 and the second breaking guide wire 11e2 and one short side (the upper short side in FIG. 7A). There is. Then, the third hole 10e3 is formed at an intermediate position between the intersection of the first breaking guide wire 11e1 and the second breaking guide wire 11e2 and the other short side (lower short side in FIG. 7A). Has been done.

The cast iron material 1E in Modification 2 is
(1) A wedge is inserted into the first hole 10e1 and a packer is operated to break the cast iron material 1E in the lateral direction (lateral direction in FIG. 7B) along the first breaking guide wire 11e1. However, the cast iron material 1E becomes about one half of the original size (see FIG. 7B),
(2) By inserting a wedge into the second hole 10e2 and operating the packer, the cast iron material 1E is broken into about 1/4 of the original size, and then the wedge is inserted into the third hole 10e3. Then, the packer is operated to break the cast iron material 1E into about 1/4 of the original size (see FIGS. 7B to 7C), and the cast iron material 1E is broken into about four parts. It will be divided into equal parts.

  The cast iron material 1E forms a hole and a breaking guide wire in the aspect described in Modification 2, and by performing the breaking step, the weight per one of the lumps 1E1 to 1E4 of the cast iron material after breaking becomes about 750 kg, The size can be brought into the electric furnace steel mill.

  In addition, in this modified example, in consideration of the work efficiency, the above-mentioned holes and the breaking guide wire are arranged, but the arrangement is not limited to this, and for example, the second hole and the breaking guide wire may be provided on the first breaking guide wire. A mode in which the third hole is formed and the first hole is formed on the line of the second breaking guide wire, or two breaking guide wires are formed along each diagonal line intersecting on the surface of the cast iron material, It does not exclude various modifications such as a mode in which a hole is formed on each breaking guide wire.

[Modification 3]
Another example (Modification 3) of the second embodiment will be described with reference to FIG. 8. The cast iron material 1F of the present modification is a rectangular parallelepiped rectangular piece in plan view and has a weight of about 1.5 tons. The cast iron material 1F includes a first breaking guide wire 11f1 formed on the surface to be processed in the width direction (horizontal direction in FIG. 8A) and a longitudinal direction (vertical direction in FIG. 8A). The second fracture guide wire 11f2 formed in () is formed.

  The first breaking guide wire 11f1 connects the lengthwise directions of the long sides of the cast iron material 1F, and is located closer to one short side than approximately the middle of the lengthwise direction of the long side ((vertical direction in FIG. 8A)). And the first hole 10f1 is formed on the line of the first breaking guide wire 11f1. It is formed at the intersection of the first breaking guide wire 11f1 and the second breaking guide wire 11f2.

  The second breakage guide wire 11f2 is formed substantially in the middle in the lengthwise direction of each short side of the cast iron material 1F, and from the other short side (lower short side in FIG. 8A) to the first hole 10f1. A second hole 10f2 is formed on the line of the second breakage guide line 11f2 having a length up to this point. The second hole 10f2 is located at an intermediate position in the lengthwise direction of the second breaking guide wire 11f2 (around one-third from the lower side of the longitudinal length of the cast iron material 1F in FIG. 8A). Formed).

The cast iron material 1F in Modification 3 is
(1) A wedge is inserted into the first hole 10f1 and a packer is operated to break the cast iron material 1F in the lateral direction (lateral direction in FIG. 8B) along the first breaking guide wire 11f1. Then, the cast iron material 1F becomes a lump 1F1 of about 1/3 of the original size and a lump of about 2/3 of the original size (later lumps 1F2, 1F3) (see FIG. 8 (b)),
(2) By inserting a wedge into the second hole 10f2 and operating the packer, the cast iron material 1F is fractured in the longitudinal direction (vertical direction in FIG. 8B) along the second fracture guide wire 11f2. Then, the two-thirds lump of the cast iron material 1F is broken in half (about one-third of the original size of the cast iron material 1F) (see FIGS. 8B to 8C). Then, the cast iron material 1F is divided into three substantially equal parts.

  The cast iron material 1F forms a hole and a breaking guide wire in the aspect described in Modification 3, and the breaking step is performed, so that the weight of each of the cast iron material masses 1F1 to 1F3 after breaking is about 500 kg, The size can be brought into the electric furnace steel mill.

[Modification 4]
Another example (Modification 4) of the second embodiment will be described with reference to FIG. 9. The cast iron material 1G of this modification is a cast iron material having a circular shape in a plan view and an arc shape in a cross section (so-called bun type) and having a weight of about 1.5 tons. The cast iron material 1G is divided into about one-third on the surface to be processed, and the first breaking guide wire 11g1 and the first breaking guide wire 11g1 are formed in an arc shape protruding toward the center. A second breaking guide wire 11g2 is formed that is slightly longer than the radius line and divides the outside of the separated area into about half (see FIG. 9A).

  A first hole 10g1 is formed on the line of the first breakage guide wire 11g1. The first hole 11g1 is formed at the intersection of the first breaking guide wire 11g1 and the second breaking guide wire 11g2 (see FIG. 9A). Then, a second hole 10g2 is formed on the line of the second breaking guide wire 11g2. The second hole 10g2 is formed at a substantially intermediate position in the lengthwise direction of the second breaking guide wire 11g2 (see FIG. 9A).

The cast iron material 1G in Modification 4 is
(1) By inserting a wedge into the first hole 10g1 and operating the packer, the cast iron material 1G may be cut out along the first breaking guide wire 11g1 (in the diagonally lateral direction in FIG. 9B). ) It fractures and the cast iron material 1G becomes a lump 1G1 of about one-third of the original size and a lump of about two-thirds of the original size (later lumps 1G2, 1G3) (see FIG. 9 (b)). ),
(2) By inserting a wedge into the second hole 10g2 and operating the packer, the cast iron material 1G is fractured in the radial direction (obliquely upward in FIG. 9B) along the second fracture guide wire 11g2. Then, the two-thirds lump of the cast iron material 1G is broken in half (each one-third of the original size of the cast iron material 1G) (see FIGS. 9B to 9C) in the order. Then, the cast iron material 1G is divided into three substantially equal parts.

  The cast iron material 1G forms a hole and a breaking guide wire in the aspect described in Modification 4, and the breaking step is performed, so that the weight of one piece of the cast iron material mass 1G1 to 1G3 after breaking is about 500 kg, The size can be brought into the electric furnace steel mill.

[Modification 5]
Another example (Modification 5) of the second embodiment will be described with reference to FIG. 10. The cast iron material 1H of the present modified example is an isosceles triangle (a short triangular pyramid type) having an apex angle with an obtuse angle in a cross section, and is approximately 1.5 tons. The cast iron material 1H is divided into about one-third on the surface to be processed, and the first breaking guide wire 11h1 and the first breaking guide wire 11h1 are formed in an arc shape protruding toward the center. A second fracture guide line 11h2 is formed that is slightly longer than the center point and divides the outside of the divided region into about half (see FIG. 10A).

  A first hole 10h1 is formed on the line of the first breaking guide wire 11h1. The first hole 11h1 is formed at the intersection of the first breaking guide wire 11h1 and the second breaking guide wire 11h2 (see FIG. 10 (a)). And the 2nd hole 10h2 is formed on the line of the 2nd fracture guide wire 11h2. The second hole 10h2 is formed at a substantially intermediate position in the lengthwise direction of the second fracture guide wire 11h2 (see FIG. 10 (a)).

The cast iron material 1H in Modification 5 is
(1) By inserting a wedge into the first hole 10h1 and operating the packer, the cast iron material 1H may be cut out along the first fracture guide wire 11h1 (in a diagonally lateral direction in FIG. 10B). ) It ruptures, and the cast iron material 1H becomes a lump 1H1 of about 1/3 of the original size and a lump of about 2/3 of the original size (later lumps 1H2, 1H3) (see FIG. 10 (b)). ),
(2) By inserting a wedge into the second hole 10h2 and operating the packer, the cast iron material 1H breaks along the second breaking guide wire 11h2 into a substantially trapezoidal shape (diagonally upward in FIG. 10B). Then, the lump of about two-thirds of the cast iron material 1H is broken in half (about one-third of the original size of the cast iron material 1H) (see FIGS. 10B to 10C). Therefore, the cast iron material 1H is broken at about three times and is divided into three substantially equal parts.

  The cast iron material 1H forms a hole and a breaking guide wire in the aspect described in the modified example 5, and by performing the breaking step, the weight per one of the lumps 1H1 to 1H3 of the cast iron material after breaking becomes about 500 kg, The size can be brought into the electric furnace steel mill.

  In each of the above-described embodiments and modifications, the fracture guide wire is orthogonal or substantially orthogonal (for example, in the range of 75 to 105 °) to the acting direction (see, for example, FIG. 1B) of the radial expansion force generated from the wedge of the packer. It is preferable to insert the wedge so as to be orthogonal to or substantially orthogonal to the formed breaking guide wire. This is because the force obtained from the packer can be maximized by forming in this direction.

  Supplementing each of the above-described embodiments and each modification, in the existing hole processing step or the drilling step, the new hole or the existing hole can be drilled by using a fusing machine having a lance pipe and various holes such as a core removing drill. It may be performed using a different instrument. Then, in the breaking step, the hydraulic packer is attached to the 0.45 class power shovel, and the hydraulic hoses of the power shovel and the hydraulic packer are connected. Next, grease is applied to the wedge of the packer, and the packer is checked for oil leakage and operation.

  Gently and deeply insert the wedge into the hole, and insert a spacer or other adjustment material if there is a gap between the hole and the hole. By applying hydraulic pressure from the power shovel to the packer and slowly operating the packer (opening the wedge), the cast iron material breaks into two or more lumps. In addition, when it does not break at once, a metal arrow or the like is driven into the break line that has occurred to maintain the gap. Then, operate the packer to close the wedge once and add the adjusting material, or replace it with a thicker adjusting material to prevent the gap between the inner wall of the hole and the wedge from occurring, and apply hydraulic pressure from the power shovel to the packer again. Activate the packer. By repeating this operation, most cast iron materials can be broken into two or more pieces.

  As the above-mentioned packer, for example, the product “Strong type packer N50W95A700” of Hirado Metal Industry Co., Ltd. is preferably used, and the hole of the cast iron material may have a diameter of 100 mm or more and 150 mm or less for receiving the wedge of this packer. preferable. Further, a hole diameter of 105 mm or more and 115 mm or less is more preferable because it does not require the use of an adjusting material, although the size has a slight margin for receiving the wedge. In addition, the packer does not exclude equipment other than the above-mentioned products that can exhibit equivalent or similar performance, and when using a packer of another company, according to the size of the wedge part of the packer, cast iron material It goes without saying that the hole diameter of can be changed.

  Further, in the process of forming the breaking guide wire, in consideration of the balance of the time taken, the work load, etc., the breaking guide wire has a depth of 5 mm or more and 1 cm or less formed from the rim of the hole using a hand grinder, for example. A groove-like form may be used. On the other hand, the deeper the break guide wire is, the easier it is to break, and the possibility that the actual break direction will match the intended one (increased accuracy) increases the equipment performance or work time. If so, a groove deeper than the above numerical value may be formed, and other types of equipment having a cutting function are not excluded from the equipment used.

  Furthermore, in consideration of its effectiveness, the breaking guide wire may be formed to a depth of 3% or more of the maximum thickness of the assumed breaking line, and the length of the wire may be formed to be 5 times or more the depth. More preferably, the width is not particularly limited.

  As described above, according to the present invention described in each embodiment and each modified example, in processing a cast iron material, particularly a cast iron material having a weight of more than 1 ton, a large-scale facility or a large working machine tool is not required, and A method for treating a cast iron material capable of safely performing work with noise and low vibration, and a hole forming auxiliary jig capable of efficiently and safely performing work such as drilling performed accompanying the method for treating a cast iron material. And can be provided.

  The terms and expressions used in the specification and the claims are merely for the purpose of explanation, and are not limiting in any way, and the characteristics and the features described in the specification and the claims are not limited. There is no intent to exclude terms or expressions equivalent to some. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention. Also, terms such as first and second do not mean grade or importance, but are used to distinguish one element from another.

1A, 1a, 1B, 1C, 1D, 1E, 1F, 1G, 1H Cast iron materials 10, 10a, 10b, 10c, 10d, 10e1, 10e2, 10f1, 10f2, 10g1, 10g2, 10h1, 10h2 Holes 11b, 11c Fracture induction Line 11e1, 11f1, 11g1, 11h1 First breaking guide line 10e1, 10f1, 10g1, 10h1 First hole 11e2, 11f2, 11g2, 11h2 Second breaking guide line 10e2, 10f2, 10g2, 10h2 Second hole 10e3 Third hole 12 Molten iron 1A1, 1A2, 1E1, 1E2, 1E3, 1E4, 1F1, 1F2, 1F3, 1G1, 1G2, 1G3, 1H1, 1H2, 1H3 Lump 2 Packer 201 Adjusting material 21 Wedge 3 Fusing machine 31 Lance pipe 4 Hole forming auxiliary jig 40 Main body 41 Side plate 42 Top plate 421 Lance pipe holding part 43 Discharging part 44 Locking part 45 Magnet type holder 8 H steel

Claims (5)

A method for treating a cast iron material, comprising: a breaking step of inserting the working portion of an expansion type crusher into a hole of a cast iron material, and breaking the cast iron material by an expanding force in a diameter expanding direction generated from the working portion after insertion. The method for treating a cast iron material according to claim 1, further comprising a hole forming step of forming the hole into which the action portion is inserted, in the cast iron material. The hole forming step is performed using a fusing machine having a lance pipe, and a hole forming auxiliary jig that is attached to the cast iron material and holds the lance pipe at a predetermined angle with respect to the cast iron material, In the operating state of the fusing machine, the peripheral wall portion that constitutes the hole forming auxiliary jig blocks the scattering or outflow of molten iron that occurs due to the use of the fusing machine, and through the discharge portion provided in the peripheral wall portion. The method for treating a cast iron material according to claim 2, wherein the liquid molten iron generated inside the peripheral wall portion is discharged in a predetermined direction. The treatment of the cast iron material according to claim 1, 2 or 3, comprising a fracture guide wire forming step of forming a groove-shaped fracture guide wire connected to the opening edge of the hole on the surface of the cast iron material. Method. It is attachable to a cast iron material that is the object to be processed, the contact portion with the cast iron material is open, and has a peripheral wall portion capable of blocking the scattering or outflow of liquid molten iron, and the peripheral wall portion, A discharging portion capable of discharging liquid molten iron in a predetermined direction, and a main body portion having a holding portion capable of holding the lance pipe of the melting machine used for the cast iron material at a predetermined angle,
A hole formation assisting jig, which is provided between the main body and the cast iron material, and has an attachment structure capable of attaching both members.

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