JP5145087B2 - Protective duct cutting tool - Google Patents

Description

  The present invention includes a main body having a contact surface that comes into contact with a wall surface and the like, and a rectangular outer shape cover that is detachably attached to the main body by being elastically deformed to each other. The present invention relates to a protective duct cutting tool for cutting a wiring / piping material protective duct capable of accommodating a piping material.

  Various cutting tools for cutting wiring / piping material protection ducts and vinyl chloride pipes have been proposed.

  FIGS. 15A and 15B illustrate a cutting tool as a background art of the present invention, in which FIG. 15A is a front view thereof, and FIG. 15B is a top view showing the position of FIG.

  The cutting tool 20 rotates about a cutting blade 11 that rotates about a cutting shaft 11a, a receiving portion 12 that receives a workpiece (large diameter pipe) P1, and a rotating shaft 15a that is the same as the cutting shaft 11a. The holding arm 15 that holds the workpiece P1 away from the cutting blade 11 at a predetermined distance in the axial direction of the workpiece P1, the tool body 16 including the cutting blade 11, the receiving portion 12, and the like, and the cutting An operation unit 17 including a stationary handle 17A and a movable handle 17B for rotating and cutting the blade 11 is provided.

  The cutting tool 20 is provided with a holding arm 15 that presses the workpiece P1 coaxially with the cutting shaft 11a with respect to the arc-shaped receiving portion 12, and can also cut and hold a small workpiece (small diameter pipe) P2. Since the arm 15 presses the materials to be cut P1 and P2 at positions spaced apart from the cutting blade 11 in the axial direction of the material to be cut P1, the cut edges can be made at right angles (paragraphs [0022] and [0023] in Patent Document 1). The effect is that.

However, although the cutting tool 20 provided with the holding arm 15 is suitable for cutting a polyvinyl chloride pipe which is difficult to deform as described above, the holding arm 15 is configured to partially cut the material to be cut in the circumferential direction. Such a cutting tool 20 is not suitable for cutting easily deformable wiring / pipe material protection ducts, such as attaching a cover part to the main body part by elastic deformation. .
JP 2003-10571 A (FIGS. 1 and 2)

  An object of the present invention is to provide a protection duct cutting tool capable of suitably cutting a wiring / piping material protection duct that is easily deformed and is intended to solve the above problems.

According to the protective duct cutting tool according to claim 1, the main body having a contact surface that comes into contact with the wall surface and the like, and the rectangular outer shape cover that is detachably attached to the main body by elastic deformation. A protection duct cutting tool that cuts a wiring / piping material protection duct capable of accommodating wiring / piping material inside with the main body portion and the cover portion assembled ,
A receiving portion that receives the contact surface of the main body portion, and a blade shaft that is fixed to the receiving portion with a protective duct received in a state where the cover portion is attached to the main body portion. A cutting blade that pivots to the center and cuts,
Furthermore, when cutting the cover blade into the cover portion of the protective duct to be cut at a position facing the blade axis with the receiving portion sandwiched during cutting, the cover portion is deformed outward by the cutting force. A top wall deformation preventing part for receiving the top wall of the cover part while maintaining a relative position with the receiving part along the shape of the top wall, and a side wall of the cover part along the shape of the side wall. A deformation preventing portion comprising a side wall deformation preventing portion that receives and holds the relative position , wherein the top wall deformation preventing portion extends from the side wall deformation preventing portion toward the blade shaft side. To do.

  The protective duct cutting tool according to claim 2 is dependent on claim 1, wherein the deformation preventing portion is provided continuously to the receiving portion, and the top wall deformation preventing portion and the side wall deformation preventing portion are covered by the cover portion. It is characterized by forming an L shape along the side wall and the top wall on the opposite blade shaft side.

  The protective duct cutting tool according to claim 3 is dependent on claim 1 or 2, and the length of the top wall deformation preventing portion is not less than half the cutting length of the top wall of the cover portion of the protective duct to be received. It is the length which receives this cover part.

  The protective duct cutting tool according to claim 4 is dependent on any one of claims 1 to 3, and the top wall deformation preventing portion and the side wall deformation preventing portion of the deformation preventing portion are received by the receiving portion with respect to the blade shaft. It is characterized in that it is provided so as to be able to co-rotate around a receiving part shaft at a position opposed to each other across the protective duct.

  The protective duct cutting tool according to claim 5 is dependent on any one of claims 1 to 4, and the top wall deformation preventing portion, the side wall deformation preventing portion of the deformation preventing portion, and the receiving portion further serve as a protective duct holding portion. It is characterized by being provided so as to be capable of co-rotating around a receiving part shaft that is integrated and is opposed to the blade axis with a protective duct received by the receiving part.

  The protective duct cutting tool according to claim 6 is dependent on claim 5, and when the protective duct holding part is rotated away from the cutting blade, a small receiving part for receiving a smaller wiring / piping material protective duct is used. It becomes possible.

  The protective duct cutting tool according to claim 7 is dependent on any one of claims 1 to 4, wherein the receiving portion is provided with a small receiving portion for receiving a smaller wiring / piping material protective duct. To do.

The protective duct cutting tool according to claim 1 includes a main body having a contact surface that contacts a wall surface or the like, and a rectangular outer shape cover that is detachably attached to the main body by being elastically deformed with each other. A protection duct cutting tool that cuts a wiring / piping material protection duct capable of accommodating wiring / piping material inside with the main body portion and the cover portion assembled ,
A receiving portion that receives the contact surface of the main body portion, and a blade shaft that is fixed to the receiving portion with a protective duct received in a state where the cover portion is attached to the main body portion. A cutting blade that pivots to the center and cuts,
Furthermore, when cutting the cover blade into the cover portion of the protective duct to be cut at a position facing the blade axis with the receiving portion sandwiched during cutting, the cover portion is deformed outward by the cutting force. A top wall deformation preventing part for receiving the top wall of the cover part while maintaining a relative position with the receiving part along the shape of the top wall, and a side wall of the cover part along the shape of the side wall. A deformation preventing portion comprising a side wall deformation preventing portion that receives and holds the relative position, and the top wall deformation preventing portion is extended from the side wall deformation preventing portion toward the blade shaft side, and therefore is deformed. It is possible to cut it easily with the wiring / piping material protection duct assembled .

  According to the protective duct cutting tool of the second aspect, in addition to the effect of the first aspect, the deformation preventing portion is provided continuously to the receiving portion, and the top wall deformation preventing portion and the side wall deformation preventing portion are cut. Since the cover portion has an L shape along the side wall and the top wall on the side opposite to the blade axis, deformation of the protective duct can be reliably prevented.

  According to the protective duct cutting tool according to claim 3, in addition to the effect of claim 1 or 2, the length of the top wall deformation preventing portion is more than half of the cutting length of the top wall of the cover portion of the protective duct to be received. Therefore, the cover portion of the protective duct is more reliably prevented from being deformed, and the protective duct can be cut more suitably.

  According to the protective duct cutting tool according to claim 4, in addition to the effect of any one of claims 1 to 3, the top wall deformation preventing portion and the side wall deformation preventing portion of the deformation preventing portion are receiving portions with respect to the blade shaft. Since it is provided so as to be able to co-rotate around the receiving part shaft located at the opposite position across the protective duct that can be received in step 1, it is easier to set the piping / wiring material protective duct to be cut.

  According to the protective duct cutting tool of claim 5, in addition to the effect of any one of claims 1 to 4, the top wall deformation preventing portion, the side wall deformation preventing portion of the deformation preventing portion, and the receiving portion further include a protective duct. It is integrated as a holding part and is provided so as to be able to co-rotate around the receiving part shaft at a position opposed to the blade axis with the protective duct received by the receiving part, so that the opening of the protective duct holding part Wiring and piping material protection ducts can be set with sufficient space on the side, making it easier to set.

  According to the protective duct cutting tool according to claim 6, in addition to the effect of claim 5, when the protective duct holding part is rotated away from the cutting blade, a small receptacle for receiving a smaller wiring / piping material protective duct. Since the portion can be used, for example, two types of protective ducts such as a two-row protective duct and a single-row protective duct can be suitably cut.

  According to the protective duct cutting tool of the seventh aspect, in addition to the effect of any one of the first to fourth aspects, the receiving portion is provided with a small receiving portion for receiving a smaller wiring / piping material protective duct. For example, two types of protective ducts such as a two-row protective duct and a single-row protective duct can be suitably cut.

Embodiments of the present invention will be described below with reference to the drawings.
<Embodiment 1>
FIG. 1 shows an example of a protective duct cutting tool according to the present invention, where (a) is a front view thereof, (b) is a side view thereof, and FIG. 2 (a) is a protection of the protective duct cutting tool of FIG. The front view which shows the state which the duct holding | maintenance part and the cutting blade opened to the maximum, (b) is a cross-sectional view which shows an example of the wiring and piping material protection duct which is the cutting object of this protection duct cutting tool.

  First, the wiring / pipe material protection duct DW to be cut by the protection duct cutting tool 10 will be described with reference to FIG.

  This wiring / piping material protection duct DW is a two-row protection duct that can accommodate two wirings / piping materials in parallel, and is made of synthetic resin and has a flexible contact surface that comes into contact with a wall surface, etc. Between the main body Da provided with Da, the cover portion Db that is detachably attached to the main body portion Da by mutual flexibility, and between the wiring / pipe material to be accommodated in the main body Da and the cover portion Db And a protective material Dc for protection and heat insulation inserted as needed.

  The side portion of the cover portion Db is referred to as a side wall Dba, and the anti-contact surface Daa side, that is, the upper surface portion is referred to as a top wall Dbb. The wiring / piping material protection duct DW may or may not use the protective material Dc. In any case, the wiring / piping material protective duct DW is configured as shown in FIG. Therefore, it is easy to bend and deform.

  The protective duct cutting tool 10 includes a rotation receiving portion 3 that receives the contact surface Daa of the main body portion Da, and a protective duct that is received by the rotation receiving portion 3 with the cover portion Db attached to the main body portion Da. A cutting blade 1 that rotates around a blade shaft 1 a that is fixed in position relative to the receiving portion 3 is cut.

  The feature is that when the cutting blade 1 is cut into the cover portion Db of the protective duct DW to be cut at a position facing the blade shaft 1a with the rotation receiving portion 3 sandwiched during cutting, the cutting force is turned outward by the cutting force. A ceiling wall deformation preventing portion 4B for receiving the top wall Dbb of the cover portion Db to be deformed while holding the relative position with the receiving portion 3 along the shape of the top wall Dbb, and the side wall Dba of the cover portion Db The deformation prevention unit 4 includes a side wall deformation prevention unit 4 </ b> A that receives and retains the relative position to the receiving unit 3 along the shape of Dba.

  The present invention is characterized by the rotation-side receiving portion 3 and the deformation preventing portion 4 that do not change in shape relatively, and collectively referred to as a protective duct holding portion 5, the details of which will be described later. On the other hand, since the tool body 6 side is the same as the protective duct cutting tool described in, for example, Japanese Patent Application Laid-Open No. 2005-312522 (by the applicant), the details are omitted, but the configuration is as follows.

  The blade shaft 1a is provided with a spring 1b that urges the cutting blade 1 in the opening direction. On the opposite side of the blade shaft 1a of the cutting blade 1, ratchet teeth 1c for sequentially rotating the cutting blade 1 are provided. Is provided. The ratchet lever 1d meshes with the ratchet teeth 1c to hold the rotational position of the cutting blade 1 each time and can release the meshing.

  The lock lever 1e is also engaged with the ratchet teeth 1c to hold the rotational position of the cutting blade 1 each time and can release the engagement. The operation unit 7 includes a fixed handle 7A on the fixed side and a rotating handle 7B that rotates about the handle shaft 7a.

  The operation side ratchet lever 7b rotates the ratchet teeth 1c counterclockwise in order from the fully opened state of the cutting blade 1 of FIG. 2 in accordance with the operation of the rotation handle 7B. At that time, the ratchet lever 1d inside the fixed handle 7A prevents the cutting blade 1 from returning clockwise.

  Further, the outer lock lever 1e of the fixed handle 7A serves as a lock when the cutting blade 1 is rotated counterclockwise to such an extent that the inner ratchet lever 1d cannot be locked. The hook lever 7c is for scratching the rotating handle 7B with respect to the fixed handle 7A and maintaining the closed state of the operation unit 7 when the protective duct cutting tool 10 is not used.

  With such a configuration, the protective duct cutting tool 10 rotates the cutting blade 1 counterclockwise on these drawings from the fully open state of FIG. 2 to the fully closed state of FIG. By operating the lever 1d, the lock lever 1e, etc., the fully opened state of FIG. 2 can be obtained.

  The protective duct holding part 5 is a "U" shape as a whole of the rotation side receiving part 3 and the deformation preventing part 4, more specifically, the wiring / pipe material protection of the main cutting target of the protective duct cutting tool 10 It has a shape in contact with the contact surface Daa, the side wall Dba, and the top wall Dbb of the double-row protection duct (see FIG. 3) that is the duct DW, and the end portion facing the blade shaft 1a of the main body side receiving portion 2 As a whole, it is configured to rotate around the provided receiving shaft 5a.

  That is, the top wall deformation preventing part 4B, the side wall deformation preventing part 4A of the deformation preventing part 4 and the rotating side receiving part 3 are integrated as a protective duct holding part 5, and are rotated with respect to the blade shaft 1a. It is provided so as to be capable of co-rotating around a receiving part shaft 5a located at a position facing the protective duct DW received by the part 3.

  Further, as shown in FIG. 1 (b), the wiring / piping material protection duct holding part 5 is connected in the vicinity of the receiving part shaft 5a, but allows the cutting blade 1 to pass between the other parts. Such a pair of bifurcated configurations on both sides allows the cutting blade 1 to cut while holding the wiring / pipe material protection duct DW in the wiring / pipe material protection duct holding portion 5.

  The relationship between the rotation of the cutting blade 1 about the blade shaft 1a and the rotation of the protective duct holding portion 5 about the receiving shaft 5a is separated from each other in the fully opened state of FIG. In the fully closed state of FIG. 1, the cutting blade 1 enters the bifurcated wiring / piping material protection duct holding part 5 and further the position of the main body side receiving part 2 in the bifurcated state. It will reach up to.

  The main body side receiving portion 2 receives the wiring / piping material protection duct DW via the rotating side receiving portion 3, and a smaller wiring / piping material protection duct DS (FIG. 10) is provided on the side close to the blade shaft 1a. A small receiving portion 2a for receiving a reference) is provided.

  The side wall deformation prevention part 4A of the deformation prevention part 4 rises at a right angle from the rotating side receiving part 3, and the top wall deformation prevention part 4B is connected to the side wall deformation prevention part 4A in a right angle direction through an inclined portion. The rotating side receiving portion 3 is parallel to the rotating side receiving portion 3.

  That is, the deformation preventing part 4 is provided continuously to the rotation side receiving part 3, and the top wall deformation preventing part 4B and the side wall deformation preventing part 4A are the side walls on the opposite blade shaft 1a side of the cover part Db to be cut. It is L-shaped along Dba and the top wall Dbb. Furthermore, the protective duct holding part 5 is in line with the outer shape of the wiring / pipe material protective duct DW to be cut, including the inclined continuous part from the side wall deformation preventing part 4A to the top wall deformation preventing part 4B. Therefore, the deformation preventing property is enhanced.

  The state of cutting the wiring / pipe material protection duct DW (double-row protection duct) using the protection duct cutting tool 10 will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected about the part same as the part already demonstrated from this, and duplication description is abbreviate | omitted.

  FIG. 3 shows a mode in which the wiring / piping material protection duct is cut by the protective duct cutting tool of FIG. 1, and FIG. 3 (a) shows a state in which the wiring / piping material protection duct is set in the opened protective duct holding portion. A perspective view and (b) are perspective views which show a state before closing and cutting a protection duct holding part from the state of (a).

  First, when cutting, the wiring / pipe material protection duct DW is inserted into the protection duct holding part 5 from the opening side of the protection duct holding part 5 with the protection duct holding part 5 and the cutting blade 1 fully opened. At this time, since the protective duct holding portion 5 and the cutting blade 1 are separated from each other with a large space, a long wiring / piping material protective duct DW is used in the direction perpendicular to the longitudinal axis direction using this space. You can easily put it in.

  That is, even when there is no space for moving the wiring / piping material protection duct DW in the longitudinal axis direction in the surrounding space, the setting operation for cutting can be performed. At this time, the contact surface Daa of the main body portion Da is held in contact with the rotating side receiving portion 3, and the top wall Dbb and the side wall Dba of the cover portion Db are held in contact with the deformation preventing portion 4.

  Next, when the protective duct holding part 5 accommodating the wiring / piping material protective duct DW is closed as shown in FIG. 3B and the rotating operation of the rotating handle 7B is repeated, the cutting blade 1 is sequentially rotated. Then approach the wiring / piping material protection duct DW and come into contact with it. FIG. 4 is a front view of the state shown in FIG. 3B as viewed from the front side of the wiring / piping material protection duct.

  Here, as shown in FIG. 4, the length 4L of the top wall deformation preventing portion 4B is longer than half the cutting length DL of the top wall Dbb of the cover portion Db of the protective duct DW to be received. It is the length to catch. If it does in this way, a deformation | transformation of the cover part Db of the protection duct DW will be prevented more reliably, and the protection duct DW can be cut | disconnected more suitably.

  Further, the half portion of the cutting length DL of the ceiling wall Dbb is a portion that is most likely to bend and deform outward when the cutting force of the cutting blade 1 is applied. By preventing the length 4L of the portion 4B from reaching that portion, the deformation preventing function is better exhibited.

  FIG. 5 is a front view showing a state in which the cutting blade is further cut into the wiring / piping material protection duct from the state of FIG. 4, and FIG. 6 is a three-minute view of the cutting blade further into the wiring / piping material protection duct from the state of FIG. FIG. 7 is a front view showing a state where the cutting blade is further cut into the wiring / pipe material protection duct by about two thirds from the state of FIG. 6, and FIG. 8 is a cutting blade. It is a front view which shows the state which the cutting | disconnection of the wiring and piping material protection duct by completed.

  Here, attention should be paid to the state of FIG. Since the deformation preventing portion 4 (the side wall deformation preventing portion 4A and the top wall deformation preventing portion 4B) receives the cover portion Db so as not to be deformed firmly in accordance with its shape, it receives the force of the cutting blade 1 without it. Thus, the movement / deformation of the cover part Db which is going to move / deform outward is prevented.

  Note also the state of FIG. Further, even when the cutting blade 1 is further rotated, the protective material Dc is cut, and the upper portion of the main body Da is started to be cut. This is because the contact surface Daa of the main body portion Da is received by the rotation side receiving portion 3, and the side wall Dba and the top wall Dbb of the cover portion Db are the deformation preventing portion 4 (the side wall deformation preventing portion 4A and the top wall deformation preventing portion. This is probably because it was accepted in 4B).

  9A is an external perspective view showing a wiring / piping material protection duct cut with the protective duct cutting tool of FIG. 1, and FIG. 9B is a wiring / cutting wire cut with a protective duct cutting tool not equipped with a deformation prevention portion. It is an external appearance perspective view which shows a piping material protection duct.

  The wiring / pipe material protection duct DW of FIG. 9 (a) cut by the protection duct cutting tool 10 provided with the protection duct holding part 5 (deformation prevention part 4) of the present invention has its main body part Da, cover part Db, All of the protective materials Dc are cut without unevenness at right angles to the axial direction of the wiring / pipe material protective duct DW.

  Compared to this, the wiring / piping material protection duct DW cut by the protection duct cutting tool without the deformation preventing portion 4 is, as shown in FIG. The cut surfaces of the portion Da, the cover portion Db, and the protective material Dc are uneven, and cannot be used as they are.

  Further, as can be seen from this cutting process, according to this protective duct cutting tool 10, the rotation side receiving portion 3 is pushed by the cutting blade 1 during cutting, and therefore the deformation preventing portion 4 that rotates together with this is also provided. Even if it is wrong, it does not move, and it can receive the wiring / pipe material protection duct DW and prevent its movement / deformation.

  That is, according to the protective duct cutting tool 10, the wiring / pipe material protection duct DW is prevented from being deformed at the time of cutting, and the wiring / pipe material protection duct can be suitably cut while being easily deformed.

  Further, since the deformation preventing portion 4 (side wall deformation preventing portion 4A and top wall deformation preventing portion 4B) is L-shaped corresponding to the shape of the side wall Dba and the top wall Dbb of the wiring / pipe material protection duct DW, Deformation can be reliably prevented. On the other hand, in this example, the deformation preventing unit 4 and the rotation receiving unit 3 are integrated and co-rotate as a protective duct holding unit 5. This is for facilitating the setting of the wiring / piping material protection ducts DW and DS to the section 5, and is not an essential requirement for preventing deformation.

  10A is an external perspective view showing a smaller wiring / piping material protection duct than the wiring / piping material protection duct shown in FIG. 3, and FIG. 10B is a perspective view of the wiring / piping material protection duct of FIG. It is a front view which shows the aspect in the case of cut | disconnecting with a protection duct cutting tool.

  The wiring / piping material protection duct DS in FIG. 10A is a single-row protection duct that accommodates the wiring / piping material protection duct DW in FIG. 3, and is made of the same synthetic resin. Although it is flexible, the degree of flexibility is small, and it includes the same main body portion Dd, cover portion De, and protective material Df.

  When cutting such a small wiring / piping material protection duct DS, the protective duct holding portion 5 is opened, the main body side receiving portion 2 is looked into, and the wiring / piping material protecting duct DS is attached to the small receiving portion 2a. Place and cut as shown in FIG. In this case, even if there is no such thing as a deformation preventing part, the wiring / piping material protection duct DS is less bent, so that its cut surface is perpendicular to the longitudinal axis direction and has no irregularities.

  In other words, according to this protective duct cutting tool 10, the wiring / pipe material protective duct DW that is large and more easily bent and deformed is preferably smaller and bent by using the protective duct holding part (deformation preventing part 4). The wiring / piping material protection duct DS with a small amount can be suitably cut by the small receiving portion 2a without using the wiring / piping material protection duct holding portion (deformation preventing portion) 5.

  In addition, the shape of the deformation | transformation prevention part 4 (side wall deformation | transformation prevention part 4A and the ceiling wall deformation | transformation prevention part 4B) is not limited to this thing of illustration, A curve is included according to the outer-diameter shape of cutting object. Also good. In other words, for example, if the top wall is a gently protruding surface, it should be a curved surface that matches that, and if the side wall and the top wall are connected by a curved surface, a corner portion corresponding to that is provided. It is good.

<Embodiment 2>
FIG. 11 shows another example of the protective duct cutting tool of the present invention, where (a) is a front view thereof and (b) is a side view thereof.

  This protective duct cutting tool 10A is shorter than the protective duct cutting tool 10 of FIG. 1 in that the rotational side receiving part 3A of the protective duct holding part 5A is short, and in cutting, in cooperation with the main body side receiving part 2A. The difference is that the contact surface Daa of the wiring / piping material protection duct DW is received.

  Also, the small receiving portion 2b is cut in accordance with the fact that the main body side receiving portion 2A is higher on the wiring / pipe material protection duct DW side so as to form the same surface as the rotating side receiving portion 3A. The difference is that the small receiving portion 2A of the tool 10 is deeper.

  According to the protective duct cutting tool 10A having such a configuration, as with the protective duct cutting tool 10 of FIGS. 1 to 10, the deformation prevention unit 4 is provided and the rotating side receiving unit 3A rotates together. The same effect as the duct cutting tool 10 can be exhibited.

<Embodiment 3>
12A and 12B show another example of the protective duct cutting tool of the present invention. FIG. 12A is a front view thereof, FIG. 12B is a side view thereof, and FIGS. 13A and 13B are protection views of FIG. It is a front view which shows the usage condition of a duct cutting tool.

  Compared with the protective duct cutting tool 10 of FIG. 1, the protective duct cutting tool 10B has no rotating side receiving portion of the protective duct holding portion 5B, and at the time of cutting, the main body side receiving portion 2B is connected to the wiring / pipe material protective duct DW. Is different in that no small receiving portion is provided.

  According to the protective duct cutting tool 10A having such a configuration, similarly to the protective duct cutting tool 10 of FIGS. 1 to 10, the deformation prevention unit 4 is provided, and as shown in FIG. Since 5B rotates in the state which received the protection duct DW, the effect similar to the protection duct cutting tool 10 can be exhibited.

  Further, as shown in FIG. 13B, the small wiring / piping material protection duct DS can be suitably cut by making the cover portion De contact the deformation preventing portion 4.

<Embodiment 3>
FIG. 14 shows another example of the protective duct cutting tool of the present invention, in which (a) is a front view thereof and (b) is a side view thereof.

  Compared to the protective duct cutting tool 10B of FIG. 12, the protective duct cutting tool 10C is fixed so that the protective duct holding part 5C is not rotated by the fixing means 5b with respect to the main body side receiving part 2C. Is different.

  According to the protective duct cutting tool 10 having such a configuration, the deformation preventing portion 4 is provided in the same manner as the protective duct cutting tool 10 of FIGS. Can be demonstrated.

  On the other hand, since the protective duct holding part 5C does not rotate, when setting the wiring / pipe material protective ducts DW, DS, the protective ducts DW, DS are moved in the axial direction thereof, and the protective duct holding part 5C is moved into the protective duct holding part 5C. It is necessary to put in.

  The protective duct cutting tool of the present invention is not limited to the above-described embodiments, and various modifications and combinations are possible within the scope and the scope of the embodiments described in the claims. The range includes these modifications and combinations.

  The protective duct cutting tool of the present invention can be used in industrial fields where it is required to be able to suitably cut the wiring / pipe material protective duct, which is easily deformed.

An example of the protection duct cutting tool of this invention is shown, (a) is the front view, (b) is the side view. (A) is a front view showing a state where the protective duct holding portion and the cutting blade of the protective duct cutting tool of FIG. 1 are opened to the maximum extent, and (b) is a wiring / piping to be cut by this protective duct cutting tool. Cross-sectional view showing an example of material protection duct 1 is a perspective view showing a state in which a wiring / piping material protection duct is set in an opened protective duct holding portion, FIG. b) is a perspective view showing a state before the protective duct holding part is closed and cut from the state of (a). 3B is a front view of the state of FIG. 3B viewed from the front side of the wiring / piping material protection duct. FIG. 4 is a front view showing a state in which the cutting blade is further cut into the wiring / piping material protection duct from the state of FIG. FIG. 5 is a front view showing a state where the cutting blade further cuts into the wiring / piping material protection duct by about one third from the state of FIG. FIG. 6 is a front view showing a state where the cutting blade further cuts into the wiring / piping material protection duct by about two thirds from the state of FIG. Front view showing the state where cutting of the wiring / piping material protection duct using the cutting blade is completed (A) is an external perspective view showing a wiring / piping material protection duct cut with the protective duct cutting tool of FIG. 1, and (b) is a wiring / piping material cut with a protective duct cutting tool not equipped with a deformation preventing portion. External perspective view showing protective duct (A) is an external perspective view showing a wiring / piping material protection duct that is smaller than the wiring / piping material protection duct shown in FIG. 3, and (b) is a wiring / piping material protection duct of FIG. Front view showing a mode when cutting with a cutting tool The other example of the protection duct cutting tool of this invention is shown, (a) is the front view, (b) is the side view. The other example of the protection duct cutting tool of this invention is shown, (a) is the front view, (b) is the side view. (A), (b) is a front view which shows the use aspect of the protection duct cutting tool of FIG. The other example of the protection duct cutting tool of this invention is shown, (a) is the front view, (b) is the side view. The cutting tool used as the background art of this invention is illustrated, (a) is the front view, (b) is the top view which shows the place which looked at (a) from upper direction

Explanation of symbols

1 Cutting blade 1a Blade axis
2-2C Body side receiving part 2a Small receiving part 3-3A Rotating side receiving part (receiving part)
3a Small receiving part 4 Deformation prevention part 4A Side wall deformation prevention part 4B Top wall deformation prevention part
4L Length of top wall deformation prevention part 5-5C Protection duct holding part 5a Receiving part shaft 6 Tool body 7 Operation part
10-10C Protective duct cutting tool Da Body
Daa contact surface Db cover part
Dba side wall
Dbb sky wall
Dc Protective material DL Top wall cut length DW Wiring / piping material protection duct DS Wiring / piping material protection duct

Claims (7)

It has a main body with a contact surface that comes into contact with the wall surface and the like, and a cover with a rectangular outer shape that can be detachably attached to the main body by elastically deforming each other, and accommodates wiring and piping materials inside A protective duct cutting tool for cutting a possible wiring / piping material protective duct with the main body portion and the cover portion assembled ,
A receiving portion that receives the contact surface of the main body portion, and a blade shaft that is fixed to the receiving portion with a protective duct received in a state where the cover portion is attached to the main body portion. A cutting blade that pivots to the center and cuts,
Furthermore, when cutting the cover blade into the cover portion of the protective duct to be cut at a position facing the blade axis with the receiving portion sandwiched during cutting, the cover portion is deformed outward by the cutting force. A top wall deformation preventing part for receiving the top wall of the cover part while maintaining a relative position with the receiving part along the shape of the top wall, and a side wall of the cover part along the shape of the side wall. Comprising a deformation prevention portion comprising a side wall deformation prevention portion that receives and holds a relative position ;
The protective duct cutting tool, wherein the top wall deformation preventing portion extends from the side wall deformation preventing portion toward the blade shaft side .   The deformation preventing portion is provided continuously to the receiving portion, and the top wall deformation preventing portion and the side wall deformation preventing portion are formed in an L shape along the side wall on the side opposite to the blade edge of the cover portion to be cut and the top wall. The protective duct cutting tool according to claim 1.   The length of the top wall deformation preventing portion is a length that receives the cover portion at a length that is half or more of the cut length of the top wall of the cover portion of the protective duct to be received. 2. The protective duct cutting tool according to 2.   The top wall deformation prevention portion and the side wall deformation prevention portion of the deformation prevention portion are provided so as to be capable of co-rotating around a receiving portion shaft located at a position opposite to the blade shaft with a protective duct received by the receiving portion. The protective duct cutting tool according to any one of claims 1 to 3, wherein the protective duct cutting tool is provided.   The top wall deformation prevention portion, the side wall deformation prevention portion, and the receiving portion of the deformation prevention portion are integrated as a protective duct holding portion, and are opposed to the blade shaft with the protective duct received by the receiving portion therebetween. The protective duct cutting tool according to any one of claims 1 to 4, wherein the protective duct cutting tool is provided so as to be capable of co-rotating about a receiving shaft.   6. The protective duct cutting tool according to claim 5, wherein when the protective duct holding part is rotated away from the cutting blade, a small receiving part for receiving a smaller wiring / piping material protective duct can be used.   The protective duct cutting tool according to any one of claims 1 to 4, wherein the receiving portion is provided with a small receiving portion for receiving a smaller wiring / piping material protecting duct.

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