JP2001038690A - Water stop material removing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a water stop material without damaging a linear body inserted into a protective pipe by providing a cylindrical blade of a cylindrical shape for forming a circular edge in a tip part for cutting out the water stop material, and providing a rotational driving mechanism for rotatably driving the cylindrical blade around the axis. SOLUTION: A tip part for cutting out a water stop material of a water stop material removing tool 11 is provided with a cylindrical blade 13 of a cylindrical shape for forming a circular edge 12 by oppositely looking at the tip part, and is provided with a rotational driving mechanism 14 for rotatably driving this cylindrical blade 13 around the axis. This constitution can easily form a hole being a hook for hooking an ordinary working tool and putting a hand by repeating a hollowing-out process by the required number of times by rotatably driving the cylindrical blade 13 by the rotational driving mechanism 14 by pressing down an edge 12 toward the water stop material 4. Thus, the water stop material 4 can be easily removed without damaging a linear body 3 inserted into a protective pipe 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for removing a waterproof material used for removing a waterproof material for stopping a pipe of a protective pipe into which a wire such as an electric cable is inserted.

[0002]

2. Description of the Related Art FIG. 13 shows a structure in which a striated body such as an electric cable or an optical cable is inserted into a skeleton serving as a wall of an underground passage or a manhole. In the figure, reference numeral 1 denotes a skeleton made of concrete or the like, reference numeral 2 denotes a protection pipe for insertion of a striated body buried in the skeleton 1, and reference numeral 3 denotes a striatum inserted into the protection pipe 2. I have. In such a protection pipe 2, in order to stop underground water or the like from flowing outside through the inside of the protection pipe 2, a pipe port 2 a is provided.
Are closed by the waterproof material 4. As the water-stopping material 4, for example, a material obtained by impregnating a porous material such as a hydrophilic sponge with a swelling agent which exhibits swelling properties by absorbing water and is cured at the same time is used. The waterproof material 4 in this case is
An insertion hole 4a smaller than the outer diameter of the striated body 4, an outer diameter larger than the inner diameter of the protection pipe 2, and an elastic force capable of contracting by receiving a compressive force are passed through the portion where the striated body 4 is passed. Have.

[0003] The waterproofing work using such a waterproofing material 4 is performed in the following flow. That is, after passing the striated body 3 into the insertion hole 4a, it is compressed from the periphery of the water-stopping material 4 so as to have a smaller outer diameter, and is inserted into the inside from the pipe opening 2a and pressed in a contracted state. . Then, since the force compressing the water-stopping material 4 is released, the water-stopping material 4 tries to return to the original outer diameter, but the inner wall surface 2b of the protection pipe 2 having an inner diameter smaller than this outer diameter. Expansion is regulated. Therefore, the outer peripheral surface 4b of the water blocking material 4 closely matches the inner wall surface 2b of the protection pipe 2. At the same time, the insertion hole 4a of the water blocking material 4
And the outer peripheral surface 3a of the striated body 3 also closely match.

Up to this point, the water stopping operation has been described. However, when water (not shown) such as groundwater is transmitted into the protection pipe 2 and flows out from the pipe opening 2a to the outside, this water is removed. First, it penetrates the water-stopping material 4 to swell the swelling agent and at the same time hardens it to an expanded state. Then, the outer peripheral surface 4b of the water blocking material 4 presses the inner wall surface 2b of the protection pipe 2 to more closely match. At the same time, the insertion hole 4a of the water-stopping material 4 also presses the outer peripheral surface 3a of the striated body 3, and more closely matches and is in an adhesive state. Through the steps described above, the mouth 2a of the protection pipe 2 is sealed watertight by the water blocking material 4.

[0005]

Although such a water-stopping material 4 has an extremely excellent water-stopping effect, it is hardened from the necessity of firmly sealing the opening 2a of the protection pipe 2. Therefore, for example, when it is necessary to replace the water-stopping material 4, there is a problem that the removal operation is difficult. In other words, when removing the water-stopping material 4, the water-stopping material 4 is partially removed little by little using a normally used tool (not shown) such as radio pliers. I couldn't easily wear it because there was no starting point for it to slip. In addition, the protective pipe 2 is removed from a narrow working place (usually, a plurality of pipes 2a of this kind of protective pipe 2 are closed while avoiding other striatum protruding from these pipes 2a. It is difficult to secure a large work area to perform the work.) This also made the removal work difficult. In order to save such trouble as much as possible, it is conceivable to cut and remove the waterproof material 4 vertically and horizontally with a sharp blade (not shown) such as a knife, but there is a possibility that the striated body 3 may be damaged. There was no use allowed for this.

The present invention has been made in view of the above circumstances, and can easily remove a water stopping material without damaging a striated body of an electric cable, a communication cable, and the like inserted in a protective pipe. The purpose is to provide tools for removing waterproof materials.

[0007]

Means for Solving the Problems The tool for removing a water-stopping material of the present invention employs the following means to solve the above-mentioned problems. That is, the waterproof material removing tool according to the first aspect is a waterproof material removing tool used for removing the waterproof material that stops water at the opening of the protective pipe through which a striated body such as an electric cable is inserted. A tip portion for cutting the water-stopping material is provided with a cylindrical blade having a circular cutting edge, and a rotary drive mechanism for rotating the cylindrical blade around its axis. And

According to the water stopping material removing tool of the first aspect, the water stopping material removing tool is held in a state where the water stopping material removing tool is held such that the axis of the cylindrical blade and the axis of the striated body are substantially parallel to each other. When the cylindrical blade is rotationally driven by the rotation drive mechanism while pressing the cutting edge toward the water-stopping material, the circular cutting edge rotates and bites deeply into the water-stopping material, and the bite portion,
It enters into the cylindrical blade internal space of the cylindrical blade. After the cylindrical blade penetrates sufficiently deeply or completely penetrates the waterproof material, the cylindrical blade is pulled out of the waterproof material, so that the material removed by the cylindrical blade is removed together with the cylindrical blade to form a hole Is done. By repeating this step as many times as necessary, a plurality of holes are formed. Furthermore, by using these holes as a starting point and removing the water-stopping material near the hole with a normally used tool such as nose pliers, the water-stopping material is partially removed. Is weakened, and the degree of fitting of the waterproof material in the protective pipe is loosened. If it is possible to pull out the water-stopping material in this state, hand out the hole formed in the water-stopping material and pull it out to remove it. Further, when it cannot be pulled out, the formed water hole is used as a starting point to remove the remaining water-stopping material with the above-mentioned normal use tool.

In the tool for removing a water-stopping material according to the first aspect of the present invention, the cylindrical blade may be formed by cutting the water-stopping material at the cutting edge of the cylinder. A discharge port for discharging the removed matter that has entered the blade is formed.

According to the water removing material removing tool according to the second aspect of the present invention, when a hole is formed in the water stopping material with the cylindrical blade, the removed material entering the inside of the cylindrical blade is removed from the cylindrical blade through the discharge port. It is discharged to the outside. Therefore, clogging does not occur inside the cylindrical blade.

According to a third aspect of the present invention, there is provided a tool for removing a waterproof material according to the second aspect, wherein the discharge port is formed on a side portion of the cylindrical blade. When the length in the axial direction is L1 and the thickness of the water blocking material is L2, L1 ≧ 0.5 × L2, and the width when the discharge port is viewed from the opposite side is W, When the inner diameter of the cylindrical blade is D, W is 0.5 to 1 times D,
The shortest distance dimension L3 between the discharge port and the cutting edge is 0.2 to 3 times the thickness dimension L2, and inside the cylindrical blade, removed matter entering the cylindrical blade is directed toward the discharge port. An inclined surface for deflecting is formed.

[0012] According to the third aspect of the present invention, an opening having such a size that the removed matter inside the cylindrical blade is reliably discharged is secured at the discharge port.

According to a fourth aspect of the present invention, there is provided a tool for removing a water-stopping material according to any one of the first to third aspects, wherein the rotary drive mechanism comprises: a rotating shaft on which the cylindrical blade is mounted;
A grip portion for holding the rotary shaft rotatably around its axis and movably in the axial direction, and one of the rotary shaft and the grip portion is formed with a thread-like groove around its axis. The other is characterized in that a protrusion fixed to this and inserted into the screw groove is formed.

According to the water-stopping material removing tool of the fourth aspect, the cylindrical blade is fixed by pressing the gripping portion toward the water-stopping material after applying the cutting edge of the cylindrical blade to the water-stopping material. The rotating shaft enters so as to be housed in the grip portion. At this time, since the threaded groove of the rotating shaft is always maintained in a state of being meshed with the projection, the rotating shaft and the cylindrical blade rotate around the axis as they enter. In this way, by simply applying a linear pressing force that presses the cylindrical blade of the water-stopping material removal tool against the water-stopper, this is converted into a force that rotates the cutting edge of the cylindrical blade and cuts the water-stopper. Is done.

According to a fifth aspect of the present invention, there is provided a tool for removing a waterproof material according to any one of the first to fourth aspects, wherein a cutting edge of the cylindrical blade is a saw blade.

According to the tool for removing water-stopping material according to the fifth aspect, the cutting edge of the water-stopping material can be easily cut by forming the cutting edge of the cylindrical blade into a saw blade having a wave shape when viewed from the side. Therefore, the biting of the cylindrical blade can be facilitated.

According to a sixth aspect of the present invention, there is provided a tool for removing a waterproof material according to any of the first to fourth aspects, wherein the cutting edge of the cylindrical blade is an oblique blade.

According to the water-stopping material removing tool of the sixth aspect, the cutting edge of the cylindrical blade is an oblique blade cut through an imaginary cross section which passes through the axis of the cylindrical blade and is inclined from the cutting edge. Since the water-stopping material is easily cut, the biting of the cylindrical blade can be facilitated.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A water-stopping material removing tool according to the present invention is used for removing a water-stopping material used for removing a water-stopping material for stopping a pipe of a protective pipe through which a striated body such as an electric cable is inserted. Embodiments of the present invention will be described below with reference to the drawings. However, it is needless to say that the present invention is not limited thereto.

Referring to FIGS. 1 to 8, a first embodiment of the present invention will be described.
The water-stopping material removing tool 11 according to the embodiment will be described below. As shown in FIG. 1, a water-stopping material removing tool 11 of the present embodiment has a circular cutting edge 12 formed at a front end portion for cutting a water-stopping material (not shown) so as to face the front end portion. A cylindrical blade 13 having a cylindrical shape, and a rotary drive mechanism 14 for rotating the cylindrical blade 13 about its axis a. The cylindrical blade 13 and the rotary drive mechanism 14
Has the axis a as its common axis.

As shown in FIG. 2 and FIG.
A cylindrical blade main body 17 having a discharge port 16 formed on a side portion for discharging the removed material E cut out by the blade edge 12 and entering the cylindrical blade interior 15 to the outside, and a cylindrical blade interior 15. And a guide member 18 that guides the removed matter E entering here to the discharge port 16. The cutting edge 12 has an axis a
When the cylindrical blade main body 17 is viewed in a cross section through a cross section (when viewed in the cross section shown in FIG. 3), the inner peripheral surface 12a is drawn on the outer periphery of the distal end portion of the cylindrical blade main body 17 by drawing a gentle curve toward the front end.
The inclined surface 12b is formed in an annular shape as shown in the perspective view of FIG. In other words, by forming the inclined surface 12b so that the tip portion of the cylindrical blade main body 17 has a tapered shape, a circular cutting tool having a cutting point 12c at a circle where the inclined surface 12b and the inner peripheral surface 12a intersect is formed. are doing. The virtual plane 12d formed by the cutting edge 12c is perpendicular to the axis a as shown in FIG. 3, and by pressing the cutting edge 12c so as to be in close contact with the waterproof material, naturally, Cylindrical blade body 17
The (waterproof material removing tool 11) is maintained substantially perpendicular to the waterproof material.

As shown in FIG. 3, the inner peripheral surface 12a of the cylindrical blade main body 7 has a constant inner diameter d1 at any position in the full length direction. It is a space. Therefore, the cylindrical blade body 1
Reference numeral 7 denotes a hollow cylindrical shape having an open front end portion and a rear end portion. The outer diameter d2 of the cylindrical blade main body 17 has a constant size in the entire length direction except for the inclined surface 12b. Further, a screw insertion hole 17b through which the screw 20 is inserted is formed on the side of the cylindrical blade main body 17 on the rear end side where the guide member 18 is inserted and fixed.

When viewed from the opposite side as shown in FIG. 2, the discharge port 16 has a substantially elliptical shape that is long in the direction of the axis a, and has an opening that connects the inside of the cylindrical blade body 15 of the cylindrical blade body 17 to the outside. It has become. When this is viewed from the side shown in FIG. 3, the outer peripheral surface 17a of the cylindrical blade main body 17 is formed so as to be cut out toward the axis a, and both ends 16a and 16b are discharged. It is formed so as to draw a gentle curve so that the removal object E smoothly passes through the outlet 16 without being caught.

As shown in FIG. 3, the guide member 18 has a substantially columnar shape having an inclined surface 18a formed on the front end side, which passes through the axis a and is inclined with respect to the axis a. A rod-shaped attaching / detaching portion 19 having an outer diameter smaller than that of the main body and having an axis a as a common axis is provided on the rear end side of the guide member 18.
Are integrally formed. Further, the guide member 18 has an outer diameter d3 such that when the guide member 18 is inserted into the cylindrical blade inside 15 of the cylindrical blade main body 17 and has a tolerance that allows easy insertion but does not cause rattling after insertion. Is designed. By adopting such an outer diameter d3, just by fitting the guide member 18 into the cylindrical blade main body 17, the axes a of the two naturally coincide with each other. When the blade 12 is rotated in the axial direction, the cutting edge 12 is prevented from oscillating due to axial misalignment.

The guide member 18 has a screw hole 18b communicating with the screw insertion hole 17b when the guide member 18 is attached to the cylindrical blade body 17. The screw insertion hole 17b and the screw hole 18b are screwed together with the screw 20 in a state where the positions of the holes coincide with each other, and fixed.
It is fixed so that the movement in the direction of the axis a between them and the rotational displacement around the axis a do not occur. Also, this screw 2
0, the discharge port 16 is fixed as shown in FIG.
When viewed from the opposite side, the discharge port 16 and the inclined surface 18a
And the position match. As shown in FIG. 3, the attached screw 20 has an end facing the outside so as not to protrude beyond the outer peripheral surface 17a.
This is to prevent the screw 20 from projecting and catching on the water-stopping material when cutting into the water-stopping material. Thereby, the cylindrical blade 13 can be smoothly screwed into the waterproof material.

The size and position of the above-mentioned discharge port 16 are preferably as follows in order to easily discharge the removed matter E from the discharge port 16 smoothly. That is, as shown in FIG. 6, when the length of the discharge port 16 in the direction of the axis a is L1 and the thickness of the water blocking material is L2,
It is preferable that 1 is 1/2 or more times L2, and 1 to 2 times, because the removed matter E can be easily discharged from the discharge port 16. As shown in FIG. 2, when the width dimension when the discharge port 16 is viewed from the opposite side is W and the inner diameter dimension of the cylindrical blade body 17 (the cylindrical blade 13) is D, W is 0.5 to 0.5 of D. It is preferable to set the value to 1 because the removed material E is easily discharged from the discharge port 16. As shown in FIG. 6, the shortest distance dimension L3 between the discharge port 16 and the cutting edge 12 is preferably 0.2 to 3 times, more preferably 0.5 to 1 times the thickness dimension L2. However, this is good because the removed material E does not cause clogging in the cylindrical blade interior 15. The inclination angle α of the inclined surface 18a of the guide member 18 shown in FIG. 3 is desirably in the range of 15 to 45 degrees, more preferably 30 degrees. If the inclination angle α is 15 degrees or less, the total length of the
6 is longer than the entire length, and a part of the discharge port 16 is closed and narrowed, or the inside of the cylindrical blade 15 is narrowed to remove the material E.
A problem that hinders the passage of traffic. Conversely, if the inclination angle α is 45 degrees or more, it becomes difficult to deflect the progress of the removal object E to the outside, and there is a problem that clogging in the cylindrical blade body 17 is likely to occur. Further, as shown in the figure, when the distance dimension from the cutting edge 12 to the tip of the guide member 18 is L4, it is preferable that the distance dimension L4 is equal to or larger than the thickness dimension L2 of the waterproof material.

As shown in FIG. 5, the attaching / detaching portion 19 has an engaging groove 19a for engaging and fixing the attaching / detaching portion 19 to the rotary drive mechanism 14, and a rotational driving force to the attaching / detaching portion 19. Protrusions 19b for receiving are formed. Engagement groove 1
9a is a V-shaped cross section shown in FIG.
The engagement groove 21 is engaged with the engagement pin 21 of the rotation drive mechanism 14 (details of the engagement pin 21 will be described later) so that the detachable portion 19 does not accidentally come off in the direction of the axis a. Has become. The shape of the engaging groove 19a is not limited to the V-shaped groove of the present embodiment, but may be any shape as long as the engaging pin 21 can be engaged and disengaged. Further, the method is not limited to the engagement between the engagement groove 19a and the engagement pin 21, but may be any as long as the attachment / detachment portion 19 can be fixed so as not to accidentally come out in the direction of the axis a. You may adopt it. The projection 19b is attached to the detachable portion 1
9 is formed by scraping off one side of the rear end, and when viewed from the opposite side with a line of sight passing through the axis a, it is roughly located at a position deviated to the outer peripheral side from the center where the axis a is located. A half-moon-shaped projection is formed. The transmission of the rotational driving force at the joint between the rotary drive mechanism 14 and the detachable portion 19 may be performed as long as the detachable portion 19 can be fixed to the rotary drive mechanism 14 so as not to rotate relative to the rotary drive mechanism 14. You may.

The rotary drive mechanism 14 shown in FIG.
3 has a rotating shaft 22 to which is mounted, and a gripping portion 23 which holds the rotating shaft 22 rotatably around its axis a and movably in the direction of the axis a. The rotating shaft 22 has a pair of screw grooves 22a and 2
2b is formed. The rotation shaft 22 is movable in the direction of the axis a in a cylindrical storage hole 23a formed coaxially in the grip portion 23, and is urged by a spring (not shown) so that a part thereof is exposed to the outside. It is kept in the state. Further, the holding portion 23 is provided with a stopper (not shown) for preventing the rotation shaft 22 from completely coming off the storage hole 23a. Therefore,
The rotating shaft 22 is constantly urged by the spring so as to protrude from the grip portion 23 in the direction of the axis a, but is regulated by the stopper so as not to come out completely.

The inner diameter of the storage hole 23a is designed to have such a size that the rotation shaft 22 can be easily moved in the direction of the axis a, but that the axis a does not rattle enough to cause a large deviation. With respect to the screw grooves 22 a and 22 b of the rotating shaft 22, a screw 24 is provided in the grip portion 23 by a switch 24.
A protruding portion (not shown) that can be appropriately selectively inserted is fixed to either the 2a or the screw groove 22b. The switch 24 can select and fix any one of three positions in the direction of the axis a.
Depending on the fixed position 4, it is possible to select whether to rotate the rotation shaft 22 clockwise with respect to the axis a, to rotate counterclockwise, or to prohibit rotation.

That is, the protrusion in the grip portion 23 is inserted along the spiral direction of either the spiral groove 22a or the spiral groove 22b depending on the fixed position of the switch 24, or It is possible to regulate so that the rotation of is impossible. Therefore, for example, when the switch 24 is selected on the tip side in the direction of the axis a, the rotating shaft 2
2 at the rear end side in the direction of the axis a (the side toward the grip portion 23)
When the pressing force is applied toward
Is inserted along the helical direction of the rotating shaft 22 (
The cylindrical blade 13) is rotated counterclockwise (in the direction of the arrow in FIG. 1) toward the distal end. Conversely, when the switch 24 is selected on the rear end side in the direction of the axis a, when a pressing force is applied to the rotating shaft 22 toward the rear end side in the direction of the axis a, the protrusion is formed in the spiral shape of the spiral groove 22b. Is inserted along the direction of rotation 22
Then, the cylindrical blade 13 is rotated clockwise (in the direction opposite to the arrow in FIG. 1) toward the distal end.

In the present embodiment, screw grooves 22a and 22b are formed on the rotating shaft 22 and the protrusions are formed on the grip portion 23 side. However, the present invention is not limited to this. On the other hand, if a pressing force toward the rear end side in the direction of the axis a is applied, the rotating shaft 22 may be configured to rotate with respect to the gripping portion 23. For example, the screw may be screwed into the storage hole 23 a of the gripping portion 23. A configuration (not shown) may be employed in which a groove is formed and a protrusion inserted into the screw groove is formed on the outer peripheral surface of the rotating shaft 22. In addition, the screw-shaped grooves correspond to the reference numerals 22a and 22b.
Although a book is formed, the present invention is not limited to this, and a configuration may be adopted in which only one is formed and rotated in one direction.

As shown in FIG. 5, a release cap 25 for performing a release operation for detaching the attaching / detaching portion 9 of the cylindrical blade 3 is slidably movable in the direction of the axis a at the distal end of the rotating shaft 22. Is covered to cover. The release cap 25 has a substantially hollow cylindrical shape, and a spring retainer 25a for retaining a spring 26 held between the release cap 25 and the rotating shaft 22 is formed on the distal end side. That is, a portion having an outer diameter reduced by one step is formed at the tip portion of the rotating shaft 22, and a spring retainer 25 a (that is, the entire release cap 25) is coaxially attached to this portion to move the tip end in the direction of the axis a. It is always biased toward the side. However, this spring retainer 25a is a ring 2 fitted on the tip of the rotating shaft 22.
7 prevents the release cap 25 from moving more than necessary and coming off.

The engaging pin 21 is attached to such a release cap 25, and by moving the release cap 25 backward (moving rearward in the direction of the axis a), the release cap 25 moves upward in the line of sight of FIG. It can be moved in conjunction with it. Therefore, when no operation is performed on the release cap 25, the release cap 25 is urged forward by the spring 26 in the direction of the axis a, and the engagement state of the engagement pin 21 with the engagement groove 19a is maintained. The attachment / detachment portion 19 (that is, the cylindrical blade 13) is fixed so as not to be pulled out. Conversely, when the release cap 25 is operated to retreat with respect to the rotation shaft 22, the engagement pin 21 is
9a, the attachment / detachment portion 19 (ie, the cylindrical blade 13
)) It can be pulled out.

Next, a method for removing the waterproof material using the waterproof material removing tool 11 of the present embodiment will be described with reference to FIGS. Note that the same components as those of FIG. 13 described in the related art, such as the water stop material, are denoted by the same reference numerals, and description thereof will be omitted. First, as shown in FIG.
After holding the water-stopping material removing tool 11 by hand so that its axis a is parallel to the axis of the striated body 3 (or substantially perpendicular to the outer surface of the water-stopping material 4) Then, the cutting edge 12 is pressed against the water-stopping material 4 at a position distant from the striated body 3. After the cutting edge 12 comes into contact with the surface of the water-stopping material 4, by further applying a pressing force in the direction of the arrow in FIG. 6, a part of the water-stopping material 4 is hollowed out as a removed material E as shown in FIG. 7. It will be.

That is, after the cutting edge 12 is brought into contact with the water-stopping material 4, the gripping portion 23 is further pressed against the water-stopping material 4, so that the rotating shaft 22 is moved rearward (to the storage portion 23a of the gripping portion 23). (Inward direction). Then, the protrusion in the holding portion 23 is
The rotating shaft 22 rotates so as to pass through 2a or 22b, so that the cutting edge 12 of the cylindrical blade 13 rotates. The cylindrical blade 13 that has obtained such a rotational driving force and an urging force penetrates deeply while hollowing out the water-stopping material 4, and the bite portion (removed material E) enters the cylindrical blade inside 15 of the cylindrical blade 13. I will enter. At this time, the removed material E is guided to the discharge port 16 by the guide member 18, and is sequentially discharged from the discharge port 16 toward the outside of the cylindrical blade 13.

After the cylindrical blade 13 penetrates sufficiently deeply or completely penetrates the waterproof material 4, the cylindrical blade 13 is
The removal material E hollowed out by the cylindrical blade 13 is removed together with the cylindrical blade 13 to form the hole 27. By repeating this step as many times as necessary, the state shown in FIG. 8 is obtained. Further, using these holes 27 as a starting point, each hole 27 is formed by a commonly used tool (not shown) such as pliers.
By removing the water-stopping material 4 in the vicinity, the water-stopping material 4 is partially removed as shown by the oblique line 28, so that the force that has pressed the inside of the protection pipe 2 is weakened, and the protection pipe 2 The degree of fitting of the water stopping material 4 in the inside becomes loose. If it is possible to pull out the water-stopping material 4 in this state, the water-stopping material 4 is pulled out by removing the water-stopping material 4 by hand. In the case where it cannot be pulled out, the remaining water-stopping material 4 is removed by using the hole 28 formed as a starting point with the above-mentioned normal use tool.

According to the water-stopping material removing tool 11 of the present embodiment, a cylindrical cylindrical blade 13 having a circular cutting edge 12 formed with the front end portion viewed in opposition, and the cylindrical blade 13 having its axial line A configuration including a rotation drive mechanism 14 that drives the rotation around a is adopted. With this configuration, the cutting edge 12 can be
By repeatedly pressing and rotating the cylindrical blade 13 by the rotary drive mechanism 14 by the rotary drive mechanism 14 a necessary number of times, a normally used tool such as pliers or a hole serving as a hook for catching a hand can be easily formed. . In addition, in this removal step, since the hole 27 is formed by pressing the cylindrical blade 13 so as to be substantially parallel to the striated body 3, for example, a similar hole is formed using a knife or the like. The risk of damaging the striatum 3 is low. Therefore, the water stopping material 4 can be easily removed without damaging the striated body 3 inserted into the protection pipe 2.

The tool 11 for removing water stoppage according to the present embodiment
According to this, a configuration is provided in which a discharge port 16 for discharging the removed material E cut off by the cutting edge 12 and entering the inside 15 of the cylindrical blade is provided at a side portion of the cylindrical blade 13 so that the cylindrical blade 13 stops at the cylindrical blade 13. The removal material E that enters the inside of the cylindrical blade 15 when the hole 27 is formed in the water material 4 is guided to the discharge port 16 by the guide member 18, and from the discharge port 16 toward the outside of the cylindrical blade 13. Is discharged. Therefore, the inside 15 of the cylindrical blade is not clogged, so that the sharpness of the cylindrical blade 13 can be maintained even when the cylindrical blade 13 is cut deeply.

The tool 1 for removing a waterproof material according to the present embodiment
According to 1, when the outlet 16 is formed on the side of the cylindrical blade 13, the length of the outlet 16 in the direction of the axis a is L1, and the thickness of the water blocking material 4 is L2, L1 ≧ 0.
5 × L2, where W is the width when the discharge port 16 is viewed from the opposite side, and D is the inner diameter of the cylindrical blade 13
Is 0.5 to 1 times D, and the shortest distance dimension L3 between the discharge port 16 and the cutting edge 12 is 0.2 to 3 times (more preferably 0.5 to 1 time) the thickness L2. , Inside the cylindrical blade 1
5 has a guide member 1 having an inclined surface for deflecting the removal object E entering the inside 15 of the cylindrical blade toward the discharge port 16.
By employing the configuration in which the cutout 8 is formed, the opening of the discharge port 16 when cutting into the water blocking material 4 is ensured, so that the removed material E in the inside 15 of the cylindrical blade is reliably discharged from the discharge port 16 to the outside. It can be removed.

Further, the water-stopping material removing tool 1 of the present embodiment
According to the first embodiment, the rotary drive mechanism 14 is connected to the screw grooves 22a, 22a.
By having the rotating shaft 22 formed with b and the grip 23 formed with the protrusion, a straight line for pressing the cylindrical blade 13 of the water-stopping material removing tool 11 toward the water-stopping material 4. By applying a proper pressing force, this is converted into a force for rotating the cutting edge 12 of the cylindrical blade 13 to cut the water blocking material 4. Therefore, the holding portion 23 and the rotating shaft 2 both having a cylindrical shape are used.
The combination of the blade 2 and the cylindrical blade 13 makes it possible to rotate the blade edge 12 while making it possible to use a tool with a thin outer shape as a whole. It becomes possible.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, only the points different from the first embodiment will be described, and other configurations are the same as in the first embodiment, and the description thereof will be omitted. The water-stopping material removing tool 31 of the present embodiment shown in FIG. 9 is particularly different from the first embodiment in that a different rotary drive mechanism 32 is provided instead of the rotary drive mechanism 14. That is, the rotation drive mechanism 32 includes a rotation shaft 33 and a grip portion 34 that holds the rotation shaft 33 rotatably around the axis a.
A disk gear 35 that rotationally drives the rotating shaft 33, a handle 36 that is held and rotated by hand to rotationally drive the disk gear 35, and a cylindrical blade attaching / detaching portion 37 for attaching and detaching the cylindrical blade 13. I have.

The rotating shaft 33 has a pair of gears 33a and 33b fixed to the rotating shaft 33 and rotating coaxially. The gears 33a and 33b mesh with a gear 35a formed on one side of the disk gear 35 in a circumferential shape. The disk gear 35 is fixed to the grip portion 34 so as to be rotatable around a central axis 35b. By rotating a handle 36 fixed to the other side of the disk gear 35 by hand, the rotation shaft 33 is rotated about the axis a. It can rotate. At the tip of the rotating shaft 33, a cylindrical blade attaching / detaching portion 37 into which the attaching / detaching portion 19 of the cylindrical blade 13 is inserted and fixed is provided.
Is rotated in one direction, the three built-in claws 37a (see FIG. 10) approach each other, and the detachable portion 19 inserted therebetween is sandwiched from the outer periphery so that it cannot be pulled out and cannot be relatively rotated. It can be grasped. A spring 37b is provided between these adjacent claws 37a, and by rotating the cylindrical blade attaching / detaching portion 37 in the other direction, the gaps between the claws 37a are opened and the attaching / detaching portion 19 can be removed therefrom. Become.

The method of removing the water-stopping material 4 by the water-stopping material removing tool 31 of this embodiment is the same as that of the first embodiment. The difference is that the rotation is performed by the rotation of the shaft 33. According to the waterproofing material removing tool 31 of the present embodiment,
The same effect as that of the water-stopping material removing tool 11 of the first embodiment can be obtained. However, since the cylindrical blade 13 is positively rotated by the turning force of the handle 36, the first embodiment is different from the first embodiment. A rotational driving force stronger than the water-stopping material removing tool 11 is applied to the cylindrical blade 1.
3 can be given. However, since the handle 36 is rotated, it is suitable for use in a place where a relatively large work area is secured.

Next, a third embodiment of the present invention will be described with reference to FIG.
The tool 41 for removing water-stopping material according to the embodiment will be described. In the present embodiment, only the points different from the first embodiment will be described, and other configurations are the same as in the first embodiment, and the description thereof will be omitted. The cutting edge 42 of the cylindrical blade 13 of the present embodiment is a saw blade having a wave shape when viewed from the side, and has a saw-shaped blade formed in a circular shape. According to the water-stop material removing tool 41 of the present embodiment, the same operation and effect as those of the first embodiment can be obtained, but the water-stop material by rotation is provided by the saw-tooth-shaped cutting edge 42. Can be more easily cut.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
The tool 51 for removing a waterproof material according to the embodiment will be described. In the present embodiment, only the points different from the first embodiment will be described, and other configurations are the same as in the first embodiment, and the description thereof will be omitted. The cutting edge 52 of the cylindrical blade 13 according to the present embodiment is an oblique blade cut along an axis a of the cylindrical blade 13 and cut at an imaginary cross section inclined from the axis a, and has a sharp tip shape. According to the waterproofing material removing tool 51 of the present embodiment,
The same function and effect as those of the first embodiment can be obtained, but the cutting depth when applying a pressing force in the direction of the axis a can be further increased by the sharply formed cutting edge 52 as an oblique blade. It has become.

The outlet 16 in the first to fourth embodiments is formed on the side of the cylindrical blade 13, but is not limited to this. It is good also as what is formed in the position of. That is, the cylindrical blade 13
Is extended to the rear ends of the grip portions 23 and 24 (not shown), and the extended portions are rotatably held in accommodating holes formed coaxially in the grip portions 23 and 24, and the guide member is provided. 18
Is removed to form an opening at the rear end of the cylindrical blade 13. In this case, the removal object E that enters the inside of the cylindrical blade 15 from the blade edge 12 proceeds straight and is discharged to the outside through the opening of the cylindrical blade 13. Although the rotation drive mechanisms 14 and 32 in the first to fourth embodiments are manually rotated, the invention is not limited thereto, and a configuration in which the rotation is electrically driven may be adopted.

[0047]

According to the water-stopping material removing tool of the first aspect of the present invention, a cylindrical cylindrical blade having a circular cutting edge is formed, and the cylindrical blade is driven to rotate about its axis. A configuration having a rotation drive mechanism was adopted. With this configuration, the process of rotating the cylindrical blade by the rotary drive mechanism and pressing the blade tip against the water stopping material and repeating the process of cutting out the necessary number of times is necessary, so that the tool can be used for hooking hands or tools normally used such as radio pliers. Holes can be easily formed. In addition, in this removal step, since a hole is formed by pressing the cylindrical blade so as to be substantially parallel to the striated body, the striated line is compared with a case where a similar hole is formed using, for example, a knife or the like. Low risk of harm to body. Therefore,
The waterproof material can be easily removed without damaging the striatum inserted into the protection pipe.

According to the second aspect of the present invention, there is provided a tool for removing water which is provided at a side portion of a cylindrical blade, for discharging a removed material which has been cut off at a blade edge and entered into the cylindrical blade. By adopting, the removed material entering the inside of the cylindrical blade when forming a hole in the water stopping material with the cylindrical blade is guided to the discharge port by the guide member, and from the discharge port toward the outside of the cylindrical blade. Is discharged. Therefore, clogging does not occur inside the cylindrical blade, so that the sharpness of the cylindrical blade can be maintained even when cutting deeply.

According to the third aspect of the present invention, the discharge port is formed on the side of the cylindrical blade, and the length of the discharge port in the axial direction is L1, and When the thickness of the material is L2, L1 ≧ 0.5 × L2, W is the width when the discharge port is viewed from the opposite side, and D is the inner diameter of the cylindrical blade. 0.5 to 1 times, and the shortest distance dimension L3 between the discharge port and the cutting edge is the thickness dimension L2.
0.2 to 3 times as large as that of the above, and the inside of the cylindrical blade is formed with an inclined surface that deflects the removal material entering the inside of the cylindrical blade toward the discharge port. Since the opening of the discharge port at the time of cutting into the hole is secured, it is possible to reliably remove the removed matter inside the cylindrical blade from the discharge port to the outside.

According to the fourth aspect of the present invention, there is provided a tool for removing a water-stopping material, wherein the rotary drive mechanism comprises a holding portion having a threaded groove formed on one side and a projection formed on the other side, and a rotary shaft. By having a linear pressing force that presses the cylindrical blade of the tool for removing water-stopping material toward the water-stopping material by having
This is converted into a rotational force that rotates the cutting edge of the cylindrical blade by rotating the cutting edge of the cylindrical blade. Therefore, the combination of the gripping portion, the rotating shaft and the cylindrical portion, both of which have a cylindrical shape, enables rotation of the cutting edge, while making it possible to use a tool having a thin external shape as a whole, so that only a narrow working place can be secured. At the site, the removal operation can be easily performed.

Further, according to the water-stopping material removing tool of the fifth aspect, since the cutting edge of the cylindrical blade is a saw blade, the cut-off of the water-stopping material is easily made, so that the biting of the cylindrical blade is prevented. It can be made easier.

Further, according to the water-stopping material removing tool according to the sixth aspect of the present invention, the water-stopping material can be easily cut by forming the cutting edge of the cylindrical blade as a sharp oblique blade. Biting can be facilitated.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of a water-stopping material removing tool according to the present invention, and is a side view.

FIG. 2 is a side view showing a cylindrical blade of the water-stopping material removing tool of the embodiment.

FIG. 3 is a view showing a cylindrical blade of the water-stopping material removing tool according to the embodiment, and is a cross-sectional view taken along line AA of FIG. 2;

FIG. 4 is a perspective view of a tip of a cylindrical blade of the water-stopping material removing tool according to the embodiment.

5 is a view showing a mechanism for attaching and detaching the cylindrical blade of the water-stopping material removing tool according to the embodiment, and is a cross-sectional view of a portion B shown in FIG. 1 taken along a cross-section passing through the axis of the cylindrical blade.

FIG. 6 is a side view showing a step of removing the water stopping material by the water stopping material removing tool of the embodiment.

FIG. 7 is a side view showing a continuation of a water stopping material removing step by the water stopping material removing tool of the embodiment.

FIG. 8 is a view showing a continuation of the step of removing the water stopping material by the water stopping material removing tool according to the embodiment, and is a front view of the water stopping material taken along line CC in FIG. 7;

FIG. 9 is a view showing a second embodiment of the water-blocking material removing tool according to the present invention, and is a side view.

10 is a view showing a mechanism for attaching and detaching the cylindrical blade of the water-stopping material removing tool according to the embodiment, and is a cross-sectional view as seen from the line DD in FIG. 9;

FIG. 11 is a view showing a cylindrical blade of a water-stopping material removing tool according to a third embodiment of the present invention, and is a perspective view of a distal end portion.

FIG. 12 is a diagram showing a cylindrical blade of a water-stopping material removing tool according to a fourth embodiment of the present invention, and is a perspective view of a tip portion.

FIG. 13 is a view showing construction of a general waterproof material,
It is sectional drawing in the cross section which passes along the axis of a protection pipe.

[Explanation of symbols]

 2 ... Protective pipe 2a ... Tube mouth 3 ... Striatal body 4 ... Waterproof material 11, 31, 41, 51 ... Waterproof material removal tool 12, 42, 52 ... Cutting edge 13 ... Cylindrical blade 14, 32 ... Rotation drive mechanism 15 ... Inside the cylindrical blade 16 ... Discharge port 18a ... Slope surface 19 ... Rotary shaft 22a, 22b ... Screw groove 23 ... gripping part a ... axis D ... inner diameter dimension E ... removed object L1 ... length dimension L2 ... thickness dimension L3 ... shortest distance dimension W ... width dimension

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Minami Ichiro, inventor, 1-4-6 Konan, Minato-ku, Tokyo Inside Mitsubishi Rayon Co., Ltd. (72) Inventor Toshiaki Doi 1-4-41, Konan, Minato-ku, Tokyo Mitsubishi Rayon Co., Ltd. (72) Inventor Hiroshi Ebine 1-6-1, Konan, Minato-ku, Tokyo Mitsubishi Rayon Co., Ltd. F-term (reference) 3C060 AA20 BA05 BB19 5G363 AA01 AA13 AA20 BA07 CA07 CB12

Claims (6)

[Claims] 1. A water-stop material removing tool used for removing a water-stop material for stopping water at a mouth of a protective pipe through which a striated body such as an electric cable is inserted, wherein a tip for cutting the water-stop material is provided. A tool for removing a water-stopping material, comprising: a cylindrical blade having a circular cutting edge formed in a portion thereof; and a rotary drive mechanism for driving the cylindrical blade to rotate about its axis. 2. The tool for removing a water-stopping material according to claim 1, wherein the cylindrical blade has a discharge port for discharging a removed material of the water-stopping material cut off at the cutting edge and entering the inside of the cylindrical blade. A tool for removing a waterproof material, which is formed. 3. The tool for removing water-stopping material according to claim 2, wherein the discharge port is formed on a side portion of the cylindrical blade, the length of the discharge port in the axial direction is L1, and the stop is formed. When the thickness of the water material is L2, L1 ≧ 0.5 × L2
W is 0.5 to 1 times D when the width of the outlet when viewed from the opposite side is W and the inner diameter of the cylindrical blade is D. The minimum distance dimension L3 is 0.2 to 3 times the thickness dimension L2, and an inclined surface is formed inside the cylindrical blade to deflect the removal material entering the cylindrical blade toward the discharge port. A tool for removing water-blocking material, characterized in that: 4. The tool for removing water-blocking material according to claim 1, wherein the rotation drive mechanism is configured to rotate the rotation axis around the axis, to which the cylindrical blade is mounted, and to rotate the rotation axis around the axis. And a grip portion that is movably held in a direction, and one of the rotating shaft and the grip portion is formed with a screw groove around the axis thereof, and the other is fixed to the screw groove to form the screw shape. A tool for removing a water blocking material, wherein a protrusion inserted into a groove is formed. 5. The tool for removing water-stopping material according to claim 1, wherein the cutting edge of the cylindrical blade is a saw blade. 6. The tool for removing water-stopping material according to claim 1, wherein the cutting edge of the cylindrical blade is an oblique blade.