JP2003013476A - Removal device for lead for caulking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removal device for lead for a caulking capable of easily removing lead for the caulking in a drain-pipe joining section safely in a short time by a simple facility. SOLUTION: In the removal device 1 for lead for the caulking shaving off lead A for the caulking filled in an opening between the receptacle Pb and socket Pc of the drain-pipe joining section Pa, the removal device 1 has a fixing member 2 fixed on the upper side of the joining section Pa, a movable member 3 rotatably installed to the lower section of the fixing member 2 and a lead cuter 4 being mounted so as to be projected from the movable member 3 to a lower section and shaving off lead A for the caulking, and a screw mechanism 5 rotated on the same shaft as a drain pipe P is constituted between the lower section of the fixing member 2 and the movable member 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caulking lead removing apparatus for scraping off caulking lead filled in a gap between an insertion port and a receiving port of a drainage pipe joint.

[0002]

2. Description of the Related Art Leading caulking coking joining has been widely used as a joining method for drainage cast iron pipes up to the 40's, and when removing or repairing drainage cast iron pipes of this type,
It is necessary to remove the caulking lead at the drain joint.
This type of caulking joint is constructed by filling yarn (linen) as a backup material in the gap of the drain pipe joint and pouring molten lead into the yarn. Therefore, in the conventional work for removing lead for caulking, it is necessary to melt and remove at least lead, and the same equipment as that for acetylene welding is used. That is, an oxygen cylinder and an acetylene cylinder are installed outdoors, a gas hose is drawn from each cylinder to a work place, and a joint portion is heated by a burner to melt caulking lead. Then, when the lead is melted, the molten lead is scraped off with a metal spatula or the like from the gap between the joints.

[0003]

In such conventional work for removing lead for caulking, either when a heavy gas cylinder is carried into a building, or when a gas hose is drawn from a gas cylinder installed outdoors to a work place. Even so, it was a laborious task in the preparation stage. In addition, in order to handle firearms, it is indispensable to prepare with consideration for safety such as qualification of a dangerous material handler and fireproof curing around drainage pipes, and the preparation work was also complicated in this respect. further,
The caulking lead removal work itself requires skill due to the handling of firearms, and since the lead is scraped off while burning the drain pipe with the burner, there was a problem that the working time was long. Moreover,
Curing time for cooling is also required after work.

It is an object of the present invention to provide a caulking lead removing device capable of safely and easily removing caulking lead at a drain pipe joint with a simple facility.

[0005]

A lead removal device for caulking according to the present invention is a lead removal device for caulking which scrapes off lead for caulking filled in a gap between an insertion port and a receiving port of a drainage pipe joint. A fixed member that is fixed to surround the drainage pipe on the upper side of the joint, a movable member that is rotatably provided below the fixed member, and a lead cutter that is provided so as to project downward from the movable member and scrapes off lead for caulking. And a screw mechanism that rotates coaxially with the drain pipe is configured between the lower portion of the fixed member and the movable member.

According to this structure, when the movable member is rotated with respect to the fixed member fixed to the drainage pipe, the movable member is gradually lowered by the screw mechanism formed between them. At this time, the lead cutter protruding from the movable member cuts into the caulking lead while rotating around the axis of the drainage pipe. That is, the lead cutter for caulking can be scraped off by the lead cutter that moves following the screw pair of the screw mechanism.

In this case, the fixing member is composed of a fixing member main body provided so as to surround the drainage pipe, and four tightening screws evenly arranged in the circumferential direction of the fixing member main body. It is preferable that the fixing member main body is screwed through the fixing member main body in the radial direction so as to sandwich and fix the drainage pipe relatively.

According to this structure, the four tightening screws tightened are stretched between the fixing member body and the drain pipe,
The fixing member is fixed to the drain pipe relatively. At this time, since the four fastening screws are screwed through the fixing member in the radial direction, the fastening pipe holds the drainage pipe from four directions. Therefore, the fixing member main body can be fixed coaxially with the drain pipe by adjusting the tightening of the four tightening screws, and even if the outer peripheral surface of the drain pipe has irregularities, remove it and remove each Tightening screws can be arranged.

In these cases, it is preferable that the upper portion of the inner peripheral surface of the fixing member is expanded and formed.

According to this structure, particularly when the fixing member is attached to the drain pipe joint (drain pipe), the fixing position is
Even if it hits the lower end of the receiving port of the joint or the lower end of the branch,
This can be escaped at the part where the expansion is formed. Accordingly, the fixing member can be appropriately installed (fixed) so as to be coaxial with the drain pipe.

In these cases, it is preferable that the screw mechanism includes a male screw portion formed on the upper portion of the movable member and a female screw portion formed on the fixed member and screwed into the male screw portion.

According to this structure, since the movable member having the male screw is located inside the female screw portion of the fixed member,
It can be formed as thin as possible to be as close to the drain pipe as possible. Therefore, the movable member can be rotated around the axis at a position close to the outer peripheral surface of the drainage pipe, and the lead cutter provided on the movable member can be immediately above the gap between the insertion port and the receiving port without being deformed inward. Can be rotated at. Therefore, caulking lead can be appropriately scraped off without sacrificing the strength of the lead cutter. In consideration of the distance between the lead cutter and the caulking lead, the fixing member may be positioned and fixed to the drain pipe while the female screw portion formed on the fixed member and the male screw portion formed on the movable member are screwed together. ,preferable.

In these cases, the lead cutter preferably has an annular cutter holder fixed to the lower part of the movable member, and a cutter body extending downward from the cutter holder and integrally formed with the cutter holder.

According to this structure, since the cutter holder and the cutter body are integrally formed, the rigidity of the lead cutter as a whole can be increased, and the deformation of the cutter body and damage such as chipping from the base can be effectively prevented. can do. Further, even when the cutter body has a plurality of cutting blade portions, the lead cutter as a whole can be easily mounted or replaced.

In this case, it is preferable that the cutter body is composed of a plurality of cutting blades that are evenly arranged in the circumferential direction.

The cutting depth of the cutter body into the caulking lead for one rotation of the movable member is the same as the thread pitch of the screw mechanism. According to this configuration, since the cutter body is composed of the plurality of cutting blade portions that are evenly arranged in the circumferential direction, the cutting resistance can be evenly distributed in the circumferential direction of the cutter body, and the balance can be improved. Good and smooth cutting is possible.
Further, it is possible to reduce the cutting depth and cutting resistance of one cutting edge portion, obtain chips that can be easily taken out, and reduce the cutting load applied to each cutting edge portion.

In this case, it is preferable that the rake face of each cutting edge is inclined outward.

According to this structure, the chips of the caulking lead for scraping can be discharged outward from the joint of the drain pipe by the inclination of the rake face of each cutting edge portion toward the outside. Therefore, it is possible to prevent the chips of the caulking lead from clogging the drain pipe joint portion, and it is possible to reduce the rotational load of the lead cutter by the chips as much as possible.

In these cases, the fixed member and the movable member are formed in half, and the joining portion on the circumference of the half of the fixed member and the joining portion on the circumference of the half of the movable member are each divided into half pieces. It is preferred that a reinforcing pin extending tangentially therethrough is embedded.

According to this structure, the reinforcing pins provided on the fixed member and the movable member can properly align the joints between the fixed halves and the joints between the movable halves. You can Further, since the reinforcing pin is provided in the tangential direction between the half halves of the fixed member and the half halves of the movable member, it is possible to enhance the rigidity (integration) of each of the fixed member and the movable member. Therefore, the deformation of the fixed member and the movable member during the cutting work can be effectively prevented. Therefore, the screw mechanism provided between the lower portion of the fixed member and the movable member can properly function.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION A lead removing device for caulking according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The lead removal device for caulking removes caulking lead at a caulking joint portion of a so-called drainage cast iron pipe joined by lead caulking. In the present embodiment, in the renovation work around the water area of an apartment house newly built in the 1940s, the joint of the drainage vertical pipe (TY pipe) that connects the wastewater drainage is rotated by 90 ° with the relocation of the toilet bowl. (Do not replace the vertical drain pipe). In addition, resin caulking is performed instead of lead caulking at the joint of the drain joint after the rotation.

FIG. 1 is an overall view showing a state in which an apparatus for removing caulking lead is attached to an existing drainage vertical pipe (drainage pipe). The drainage vertical pipe (existing drainage pipe) P of the embodiment has a nominal diameter of 75 mm, and the removing device 1 is slightly larger than the outer diameter of the drainage vertical pipe P and has a main part formed in an annular shape. In this case, the removing device 1 includes a drainage pipe joint (TY pipe) P2 for connecting the toilet bowl of the drainage vertical pipe P and straight pipes P above and below the drainage pipe joint (TY pipe) P2.
The caulking lead A at the two pipe joints Pa between the pipe joint portion Pa and the pipe joint portion Pa of the upper straight pipe P1 and the drainage pipe joint P2 is removed by the removing device 1 in FIG. In order to remove the above, it is fixed directly above the insertion port Pb of the straight pipe P1.

The removing device 1 has a fixing member 2 fixed to the upper side of the pipe joint portion Pa so as to surround the drainage vertical pipe (straight pipe P1) P.
And a movable member 3 rotatably mounted on the inner peripheral surface of the fixed member 2 and a gap fixed between the insertion port Pb of the straight pipe P1 and the receiving port Pc of the drain pipe joint P2, which is fixed to the lower portion of the movable member 3. A lead cutter 4 for scraping off the filled lead A for caulking is provided. Further, in order to configure a screw mechanism 5 between the fixed member 2 and the movable member 3, a female screw portion 6 is formed on the lower inner peripheral surface of the fixed member 2 and the above-mentioned outer peripheral surface of the movable member 3 is formed. A male screw portion 7 that is screwed into the female screw portion 6 is formed.

When the lead A for caulking is removed, when the movable member 3 is rotated with respect to the fixed member 2 by the screw mechanism 5 formed between the fixed member 2 and the movable member 3, the movable member 3 is moved. 3 gradually descends while rotating around the axis of the drainage vertical pipe P. By the pair of screws of the screw mechanism 5, the lead cutter 4 fixed to the lower part of the movable member 4 scrapes off the caulking lead A while rotating around the axis of the drainage vertical pipe P. That is, for one revolution of the movable member 4, the lead A for caulking is cut by one pitch of the screw mechanism 5.
Then, the lead A for caulking is produced by rotating the movable member a plurality of times.
Is deeply cut and finally the caulking lead A is divided into the insertion port Pb side and the receiving port Pc side. Reference numeral B in the drawing is a yarn that serves as a backup material for the lead A for caulking.

As shown in FIG. 2, a main part of the fixing member 2 is formed in an annular shape, and a fixing member main body 11 mounted so as to surround the straight pipe (drainage vertical pipe P) P1 and a fixing member. The main body 11 is provided with four fixing screws 12 that are screwed from four sides and fixed to the straight pipe. The fixing member main body 11 is formed in an annular shape, and in addition to a flange-shaped joining piece 17 to be described later, an expanding portion 13 is formed on the upper inner peripheral surface thereof and the female screw portion 6 is formed on the lower inner peripheral surface thereof. Each is integrally formed. The female threaded portion 6 is 2 / of the lower portion of the fixing member main body 11.
In contrast, the expanding portion 13 occupies 1/3 of the upper portion of the fixing member main body 11 and is formed to expand once more than the female screw portion 6 through the step portion.

The four fixing screws 12 are the fixing member main body 11
Are evenly arranged in the circumferential direction, and are screwed so as to horizontally and radially penetrate toward the expanding portion 13 of the fixing member main body 11. That is, the fixing member body 11 has screw holes 1 for screwing the fixing screws 12 at four locations in the circumferential direction.
4 are formed. The fixing of the fixing member 2 to the straight pipe P1 is performed by sandwiching the straight pipe P1 from four sides with four fixing screws 12 screwed so as to penetrate the fixing member main body 11. And, the tightening of each fixing screw 12 is
So that the gap between the inner peripheral surface of the fixing member main body 11 and the outer peripheral surface of the drainage vertical pipe (straight pipe P1) P has a uniform width in the circumferential direction,
That is, it is performed while adjusting so that the fixing member 2 is arranged coaxially with the straight pipe P1.

When characters such as a pipe diameter are formed so as to project on the surface of the straight pipe P1, the fixing screws 14 are displaced in the circumferential direction so as to be disengaged from the characters and come into contact with each other. Further, when fixing the fixing member 2 to the drainage pipe joint P2 (the above-mentioned another joining portion), the fixing member 2
Even if the fixed position of the above is applied to the lower end portion of the receiving port Pc of the drainage pipe joint P2 or the lower end portion of the branch portion, the expanding portion 13 allows the fixed portion to escape. Thereby, the fixing member 2
It can be fixed horizontally without being inclined and coaxially with the straight pipe P1.

On the other hand, the fixing member (fixing member main body 11) 2 has a half-divided structure, and the pair of half-divided pieces (half-divided pieces) 16 and 16 joined to each other have a 180 ° point symmetry. is doing. Each half-split piece 16 has a pair of flange-shaped joining pieces 1 extending radially outward from both circumferential ends thereof.
7, 17 are formed. That is, each half-split piece 16 has an annular portion 18 that is the main body of the fixing member main body 11,
The pair of joint pieces 17, 17 extending from both ends of the annular portion 18 are integrally formed. Both half pieces 16,1
6 abuts the joining pieces 17 with each other, and
It is fixed with book connecting bolts 19, 19. For this reason, upper and lower two through holes 20, 20 through which the connecting bolt 19 penetrates are formed in one joint piece 17a of each half-piece 16, and the connecting bolt 19 is screwed into the other joint piece 17b. Two upper and lower screw holes 21 and 21 are formed.

A reinforcing pin 22 is embedded in one end of the annular portion 18 adjacent to the two through holes 20, 20, and the annular portion is adjacent to the two screw holes 21, 21. 18
A positioning hole 23 through which the reinforcing pin 22 is inserted is formed at the other end of the. The reinforcing pin 22 and the positioning hole 23 extend in the tangential direction, and the reinforcing pin 22 embedded so as to be press-fitted into one facing joint piece 17a.
However, it is adapted to be fitted into the positioning hole 23 of the other joint piece 17b with a predetermined dimensional tolerance. That is, one half of the reinforcing pin 22 is embedded in the one joint piece 17 a and the other half is fitted into the positioning hole 23.

In this way, the two half halves 16, 16
Are abutted against each other while being positioned by the reinforcing pin 22, and are fixed by the connecting bolt 19. In this case, since the reinforcing pins 22 extending in the tangential direction are inserted into the joints between the half-pieces 16, the half-pieces 16 are not only positioned, but also fixed by the rotational load that accompanies the cutting work. It is possible to effectively prevent deformation (distortion) in the joint portion of the member 2. In addition,
Since the fixing member main body 11 has a half-split structure, the female screw portion 6 is also in a state in which both half-split pieces 16 and 16 are joined,
Make up a female screw. In addition, the above four fixing screws 12
Two are provided on each of the two half-pieces 16.

Similarly, as shown in FIG. 3, the movable member 3
Is a movable member main body 3 which surrounds the straight pipe (drainage vertical pipe P) P1 with a slight gap and which is screwed to the fixed member 2.
1 and four rotary handles 32 attached to the movable member main body 31. The main part of the movable member main body 31 is formed in an annular shape, and in addition to a handle mounting portion 37 described later, a cylindrical male screw portion 7 having a male screw 7a formed on the outer peripheral surface is formed on the upper portion thereof, and a lower inner peripheral surface is formed. Cutter mounting part 3
4 are integrally formed. The male screw part 7 occupies 2/3 of the upper part of the movable member main body 31, whereas the cutter mounting part 34 is 1/3 of the lower part of the movable member main body 31.
Occupy three.

An annular convex portion 35 is provided between the inner peripheral surface of the male screw portion 7 and the cutter mounting portion 34, and the upper and lower mounting positions of the lead cutter 4 are restricted by the convex portion 35. The lead cutter 4 is fixed downward to the cutter mounting portion 34 in a state of surrounding the straight pipe P1 by a plurality of machine screws 36 screwed from the inside to the cutter mounting portion 34.

The movable member main body 31 is formed with four handle mounting portions 37 extending radially outward from the outer peripheral surface. The four handle attachment portions 37 extend horizontally and in four directions from the lower side of the male screw portion 7, and a rectangular fitting hole 38 is formed at the tip of each handle attachment portion 37. On the other hand, each rotating handle 32 is formed in a lateral “L” shape by the grip portion 40 and the mounting portion 41, and a fitting convex portion 42 that fits into the fitting hole 38 is provided at the lower portion of the mounting portion 41. Are formed. That is, in the rotating handle 32, the fitting convex portion 42 is fitted in the fitting hole 38 of the handle mounting portion 37, and the handle mounting portion 37 is fixed to the handle mounting portion 37 by the machine screw 43 horizontally screwed toward the fitting hole 38. It is detachably fixed.

It should be noted that the number of the rotary handles 32 may be two, and they may be provided at symmetrical positions. Also, the rotating handle 3
It is preferable that the tip position of 2 is within 230 mm from the axis of the drainage vertical pipe P. This allows the rotating handle 3
It is possible to prevent the rotary handle 32 from interfering with other adjacent vertical pipes (including a water supply vertical pipe) and the wall surface when the 2 is operated. This is a working space for new installations, with 300 mm to 35 mm between adjacent vertical pipes and wall surfaces.
This is because they have an interval of about 0 mm.

Similar to the fixed member 2, the movable member (movable member main body 31) 3 has a half-split structure, and the pair of half-split pieces (half-split pieces) 45, 45 joined to each other are
It has a 180 ° point symmetry. Each half-split piece 45 is formed with a pair of joining pieces 46 extending radially outward from both ends in the circumferential direction and also serving as half-split portions of the handle mounting portion 37. That is, each half-split piece 45 is integrally formed by an annular portion 47 that is the main body of the movable member main body 31, one handle attachment portion 37, and a pair of joining pieces 46 and 46 extending from both ends of the annular portion 47. Has been done.

The two half-split pieces 45, 45 are joined to each other by joining the joining pieces 46 to each other, and one connecting bolt 4 is provided.
It is fixed at 8. Therefore, a through hole 49 through which the connecting bolt 48 penetrates is formed in one joining piece 46a of each half-piece 45, and a screw hole 50 into which the connecting bolt 48 is screwed is formed in the other joining piece 46b. Has been done. Further, one joint piece 46a is composed of a vertical split portion 37a of the handle mounting portion 37 and a fitting hole peripheral portion 37b, and the other joint piece 46b correspondingly corresponds to the handle mounting portion 3a.
It is composed of seven vertically divided portions 37a. Therefore,
When the joining pieces 46 are butted against each other, a pair of left and right handle attaching portions 37, 37 are formed in this portion.

Further, similarly to the fixing member 2, the through hole 49
The reinforcing pin 51 is provided at one end of the annular portion 47 adjacent to the
Is embedded in the positioning hole 5 through which the reinforcing pin 51 is inserted at the other end of the annular portion 47 adjacent to the screw hole 50.
2 is formed. The reinforcing pin 51 and the positioning hole 52 extend in the tangential direction, and the reinforcing pin 51 embedded so as to be press-fitted into one of the facing joint pieces 46a is
The other joint piece 46b is fitted into the positioning hole 52 with a predetermined dimensional tolerance. That is, one half of the reinforcing pin 51 is embedded in the one joining piece 46 a, and the other half is fitted into the positioning hole 52.

In this way, the two half pieces 45, 45
Are abutted against each other while being positioned by the reinforcing pin 51, and are fixed by the connecting bolt 48. Also in this case, since the reinforcing pins 51 extending in the tangential direction are respectively inserted into the joint portions of the half pieces 45, not only the half pieces 45 are positioned but also the rotation load caused by the cutting work is applied. It is possible to effectively prevent deformation (distortion) in the joint portion of the movable member 3. In addition, since the movable member main body 31 has a half structure,
The outer peripheral surface of the male screw part 7 (male screw 7a) is also a half-split piece 4.
A male screw is formed in the state where 5 is joined.

As shown in FIG. 4, the lead cutter 4 has a cutter holder 61 fixed to the cutter mounting portion 34 of the movable member 3.
And the cutter body 6 extending downward from the cutter holder 61
2, and the cutter body 62 is composed of a plurality of cutting edge portions (details will be described later) 63. In addition, the lead cutter 4 is provided corresponding to the movable member 3 having the half structure.
Is a pair of cutter pieces 4a, 4 on the semi-arc having the same structure.
a. The cutter holder 61 is formed in an annular shape as a whole, and has a plurality of (six) burrow holes 64 with counterbore holes through which the machine screws 36 are inserted.

The cutter body 62 is composed of twelve cutting blade portions 63 which are evenly arranged in the circumferential direction. Each cutting edge 6
3 extends downward from the inner half portion of the cutter holder 61, and the blade portion 65 formed at the lower end portion is formed slightly wider. In addition, the blade portion 65 of each cutting edge portion 63
Project in the direction of rotation. In this case, in consideration of the caulking lead A to be cut, in the blade portion 65, the cutting edge 65a is an inclined blade, and the rake face 65b that is the blade surface is inclined outward. Further, the clearance angle (back of the blade) is made small in order to suppress the bite of the blade portion 65.

As a result, smooth cutting is possible, and the scraped scraps of the caulking lead A are pipe joints Pa.
Can be discharged outside. Therefore, it is possible to prevent lead chips from clogging the pipe joint portion Pa during the cutting work of the caulking lead A, and reduce the rotational load of the lead cutter 4 due to the chips.

Further, the lead cutter 4 constructed in this way
By integrally forming the cutter holder 61 and the cutter body 62, the rigidity of the lead cutter 4 as a whole can be increased, and the mounting and replacement of the lead member 4 on the movable member 4 can be facilitated. Further, the cutter body 62 has a plurality of cutting blade portions 63.
The cutting resistance applied during cutting of the caulking lead A can be reduced, chips can be easily taken out, and each cutting edge portion 63 can be obtained.
It is possible to reduce the cutting load received by.

Further, since the lead cutter 4 can be rotated right above the gap between the insertion port Pb of the pipe joint portion Pa and the receiving port Pc, the caulking lead can be obtained without sacrificing the strength of the lead cutter 4. A can be appropriately scraped off. The lead cutter 4 is made of lead A for caulking,
The yarn B is divided into a part attached to the insertion port Pb and a part attached to the receiving port Pa, and the yarn B remains as it is.

In this embodiment, the drain pipe joint P2
After removing the caulking lead A in the pipe joint portions Pa above and below the pipe joint P, the drain pipe joint P2 is rotated to a desired angle,
Subsequently, resin caulking is performed on the upper and lower pipe joints Pa. In this case, unlike the conventional one using a firearm, the work can be continuously performed without the need to cool the pipe joint portion Pa.

The cutting work is preferably performed while injecting a lubricant into each cutting edge portion 63. In particular,
The lubricant is injected through the gap between the drainage vertical pipe P and the male screw portion 7 of the movable member 3. In addition, when a sufficient fixing space cannot be secured in the vertical direction as in the case where the removing device 1 is fixed to the drainage pipe joint P2, the lead cutter 4 having a short length is used to cut the middle part in advance, and the normal lead cutter is cut. Replace with 4 and proceed with cutting.

[0046]

As described above, according to the lead removing device for caulking of the present invention, the lead cutter is lowered while rotating by the screw mechanism formed between the fixed member fixed to the drain pipe and the movable member. By doing so, it is possible to scrape off the caulking lead at the drain pipe joint. Therefore, the caulking lead can be safely removed in a short time with simple equipment. Further, the caulking lead can be safely removed without requiring the use of a firearm, and the problem of noise does not occur during work.

[Brief description of drawings]

FIG. 1 is a half sectional view of a state in which a lead removal device for caulking according to an embodiment of the present invention is attached to a drainage vertical pipe.

FIG. 2 is a structural diagram of a fixing member in the removing device of the embodiment.

FIG. 3 is a structural diagram of a movable member in the removing device of the embodiment.

FIG. 4 is a structural diagram around a lead cutter in the removing device of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Removal device 2 Fixed member 3 Movable member 4 Lead cutter 5 Screw mechanism 6 Female screw part 7 Male screw part 11 Fixing member main body 12 Fixing screw 13 Expansion part 16 Half-split piece 22 Reinforcing pin 23 Positioning hole 31 Movable member main body 32 Rotation handle 45 Half-divided piece 51 Reinforcing pin 52 Positioning hole 61 Cutter holder 62 Cutter body 63 Cutting blade portion 65 Blade portion 65a Rake surface P Drainage vertical pipe Pa Pipe joint Pb Insertion port Pc Receiving port A Caulking lead

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazutomo Kakuda             9-9 Kandanishikicho, Chiyoda-ku, Tokyo             Hon Sogo Life Co., Ltd. (72) Inventor Haruhisa Ogawa             9-9 Kandanishikicho, Chiyoda-ku, Tokyo             Hon Sogo Life Co., Ltd. (72) Inventor Shogo Fujita             Day 3-16-16 Akabane Kita-ku, Tokyo             In jeep F-term (reference) 2D061 AA04 AB07 AB10 AD01 AD10

Claims (8)

[Claims] 1. A device for removing caulking lead, which scrapes off lead for caulking filled in a gap between an insertion port and a receiving port of a drainage pipe joint, wherein the drainage pipe is fixed above the drainage pipe joint so as to surround the drainage pipe. A member, a movable member that is rotatably provided below the fixed member, and a lead cutter that is provided so as to protrude downward from the movable member and scrapes off the caulking lead. A device for removing lead for caulking, wherein a screw mechanism that rotates coaxially with the drain pipe is formed between the movable member and the movable member. 2. The fixing member includes a fixing member main body provided so as to surround a drainage pipe, and four tightening screws evenly arranged in the circumferential direction of the fixing member main body. 2. The apparatus for removing lead for caulking according to claim 1, wherein the tightening screws respectively thread through the fixing member main body in a radial direction and are screwed together to clamp and fix the drainage pipe relatively. 3. The caulking lead removing apparatus according to claim 1, wherein an upper portion of the inner peripheral surface of the fixing member is formed to be expanded. 4. The screw mechanism comprises a male screw portion formed on an upper portion of the movable member, and a female screw portion formed on the fixed member and screwed to the male screw portion. Item 1, 2
Alternatively, the apparatus for removing lead for caulking according to the item 3. 5. The lead cutter has an annular cutter holder fixed to a lower portion of the movable member, and a cutter body extending downward from the cutter holder and integrally formed with the cutter holder. The lead removal device for caulking according to any one of claims 1 to 4. 6. The apparatus for removing lead for caulking according to claim 5, wherein the cutter body is composed of a plurality of cutting blade portions that are evenly arranged in the circumferential direction. 7. The apparatus for removing lead for caulking according to claim 6, wherein the rake face of each of the cutting blades is inclined outward. 8. The fixed member and the movable member are formed in a half-divided structure, and a joining portion on the half-divided circumference of the fixed member and a joining portion on the half-divided circumference of the movable member include:
The caulking lead removing apparatus according to claim 1, wherein reinforcing pins extending in a tangential direction are embedded between the respective halves.