JP2016055357A - Roller blade cover for pipe cutter and pipe cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller blade cover for a pipe cutter which prevents an operator from contacting with a blade edge of a roller blade to improve the safety, and to provide a pipe cutter.SOLUTION: A roller blade cover 1 for a pipe cutter includes an operative mechanism part including an operation part protruding outward from a frame and configured to cause one of a pipe receiving member and a roller blade to contact with/separate from the other of the pipe receiving member and the roller blade. The roller blade cover 1 for the pipe cutter includes a blade edge cover part 12 for covering a part of the blade edge of the roller blade which is exposed from a space between the other end of a first support part and the other end of a second support part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a roller blade cover for a pipe cutter and a pipe cutter.

  Conventionally, there are various types of pipe cutters for cutting pipes, and as one of them, as shown in FIG. 9, the first support portion 911 and the first support portion 911 are opposed to each other with a space therebetween. The second support part 912, and a connecting part 913 for connecting one end of the first support part 911 and one end of the second support part 912, and the other end of the first support part 911 and the second support part 912. A frame 91 formed so that the pipe P1 introduced from between the other ends can be disposed between the first support portion 911 and the second support portion 912, and the first support portion 911 and the second support portion 912. A pipe receiving member 92 disposed between and supported by the first support portion 911; and a pipe receiving member disposed between the first support portion 911 and the second support portion 912 and supported by the second support portion 912. A shaft extending in the same direction as the center of the pipe P1 received by the pipe 92 Including a roller blade 93 provided rotatably around, and an operation mechanism portion 94 including an operation portion 941 protruding outward from the frame 91 and moving the roller blade 93 to and away from the pipe receiving member 92. Is provided (Patent Document 1).

  In order to cut the pipe P <b> 1 with this kind of pipe cutter 90, the operator receives the pipe P <b> 1 introduced from between the other end of the first support portion 911 and the other end of the second support portion 912 of the frame 91. It arrange | positions between the member 92 and the roller blade 93, the pipe receiving member 92 and the roller blade 93 are made to approach relatively by operation with respect to the operation part 941, and the blade edge | tip of the roller blade 93 bites into the outer periphery of the pipe P1.

  In this state, the operator holds the operation unit 941 and rotates the entire pipe cutter 90 around the pipe P1. As a result, the cutting edge of the roller blade 93 moves while biting on the outer periphery of the pipe P1, and as a result, the thickness of the pipe P1 at the biting position of the cutting edge becomes thinner than other parts, and the pipe P1 is finally cut. .

  By the way, in the frame 91 of this kind of pipe cutter 90, since the 1st support part 911, the 2nd support part 912, and the connection part 913 exist in the outermost part of the blade edge | tip of the roller blade 93, the roller of the part There is very little possibility that an operator touches the blade edge of the blade 93.

  However, in the frame 91 of the pipe cutter 90 of this type, the other end of the first support portion 911 and the other end of the second support portion 912 are opened, and the other end of the first support portion 911 and the second support portion are opened. Since a part of the blade edge of the roller blade 93 is exposed from between the other end of 912, the operator may touch the blade edge of the roller blade 93. In particular, since this type of pipe cutter rotates the whole around the pipe P1 when cutting the pipe P1, the direction of the exposed blade edge of the roller blade 93 changes, so that the operator can touch the blade edge of the roller blade 93. High nature.

Utility Model Registration No. 2549045

  Then, in view of the above problems, the present invention has an object to provide a roller blade cover and a pipe cutter for a pipe cutter that can prevent an operator from contacting the blade edge of the roller blade and can improve safety. To do.

  A roller blade cover for a pipe cutter according to the present invention includes a first support portion, a second support portion facing the first support portion with a space therebetween, and one end of the first support portion and the second support portion. A pipe including a connecting portion that connects one end to the other end of the first support portion and the other end of the second support portion; A frame formed so as to be disposed between the pipe support member, the pipe support member disposed between the first support portion and the second support portion and supported by the first support portion, and the first support portion. A roller blade disposed between the second support portion, supported by the second support portion, and rotatably provided about an axis extending in the same direction as the center of the pipe received by the pipe receiving member; Including an operating portion projecting outward from the frame, the pipe receiving member or the roller blade A roller blade cover for a pipe cutter including an operating mechanism for moving one of the two to the other, and exposed from between the other end of the first support and the other end of the second support. A blade edge cover portion that covers a part of the blade edge of the roller blade is provided.

  In the frame of the pipe cutter that is the premise of the roller cutter cover for the pipe cutter, the first support portion, the second support portion, and the connecting portion exist outside most of the blade edge of the roller blade. There is very little possibility that the operator touches the blade edge of the roller blade.

  And according to the roller blade cover for pipe cutters of the above configuration, the blade edge cover that covers a part of the blade edge of the roller blade exposed from between the other end of the first support portion and the other end of the second support portion. As a result, the frame and the blade edge cover portion exist outside the substantially entire circumference of the blade edge of the roller blade of the pipe cutter, and the exposure of the blade edge of the roller blade is prevented.

  Therefore, according to the said structure, when cutting a pipe with a pipe cutter, even if it rotates the whole pipe cutter around a pipe by operation with respect to an operation part, the blade edge | tip of a roller blade is not exposed outside. Therefore, according to the roller blade cover for a pipe cutter having the above-described configuration, the operator can be prevented from coming into contact with the blade edge of the roller blade.

  As one aspect of the present invention, it further includes a pair of extending portions extending from both ends of the blade edge cover portion, and the operating mechanism portion is a pair of shaft support portions disposed on both sides of the roller blade in the axial direction. And a shaft body that can be inserted into and removed from the roller blade and the pair of shaft support portions, wherein at least one end portion projects outwardly from at least one of the pair of shaft support portions, and the rotation center of the roller blade is And the pair of extending portions are provided at an interval capable of interposing the pair of shaft support portions, and at least one of the pair of extension portions is a shaft protruding from the shaft support portion. It may be engageable with the end of the body.

  According to this configuration, the pair of extending portions extend on both sides of the pair of shaft support portions, and at least one of the pair of extension portions engages with the end portion of the shaft body protruding from the shaft support portion. Thereby, the movement of the shaft body to the engagement side is restricted, and the shaft body is prevented from coming off from the shaft support portion.

  On the other hand, when the engagement between the extension portion and the end portion of the shaft body is released, the restriction on the movement of the shaft body is released, and the end portion of the shaft body protruding from the shaft support portion (the end portion on the engagement side) ) Side, the shaft is ready to be removed from the shaft support. Along with this, the roller blade is separated from the pair of shaft support portions by the shaft body being extracted from the shaft support portions. Therefore, if the above configuration is adopted, the roller blade can be replaced.

  As another aspect of the present invention, the shaft body may pass through the roller blade and the pair of shaft support portions so as to be insertable / removable, and may project both end portions outward from the pair of shaft support portions.

  According to this structure, a pair of extension part engages with the both ends of the shaft body which protruded from the pair of shaft support part. Thereby, the movement of the shaft body in the axial direction is restricted, and the shaft body is more reliably prevented from being detached from the shaft support portion. Further, the shaft body can be pulled out from the shaft support portion on each end side.

  As another aspect of the present invention, each of the pair of extending portions may have a concave portion that is recessed toward the opposite side of the pipe receiving member at the end on the pipe receiving member side.

  According to this structure, it can prevent that the pipe arrange | positioned between a pipe receiving member and a roller blade interferes with an extension part. Specifically, when cutting the pipe, the amount of biting of the blade edge of the roller blade with respect to the pipe is increased by relatively bringing the pipe receiving member and the roller blade close to each other. At this time, the extension part also approaches the pipe receiving member together with the roller blade, but the pipe enters the recess formed in the extension part. Therefore, even if the amount of biting of the blade edge of the roller blade with respect to the pipe increases, the pair of extending portions can be prevented from interfering with the pipe.

As another aspect of the present invention, the pair of extending portions are guide portions that are guided by end portions of the shaft body, and are formed on surfaces of the pair of extending portions that face each other. You may have the guide part open | released on the outer edge of the extension part.

  According to this configuration, the guide portion is guided by the end portion of the shaft body fitted from the open portion of the guide portion. Thereby, a blade edge | tip cover part can be guide | induced to the appropriate position which covers the blade edge | tip of a roller blade, and can be positioned.

  As another aspect of the present invention, the pair of extending portions are fitting recesses formed on surfaces of the pair of extending portions facing each other, and the fitting recesses into which the end portions of the shaft body are fitted. You may have.

  According to this configuration, when the fitting concave portion is fitted to the end portion of the shaft body, the extension portion is restricted from moving in the direction orthogonal to the axis of the shaft body. Therefore, the roller blade cover for a pipe cutter having the above-described configuration is prevented from being inadvertently removed while being mounted on the pipe cutter.

As another aspect of the present invention, the roller blade cover for a pipe cutter is configured such that at least one of the pair of extending portions extends from the end on the pipe receiving member side toward the other extending portion. The projecting piece may be a projecting piece extending along an end of the shaft support portion on the pipe receiving member side.

  According to this configuration, since the projecting piece hits the end of the shaft support portion on the pipe receiving member side, even if the extension portion tries to rotate around the shaft body, the rotation is prevented. Therefore, the roller blade cover for a pipe cutter having the above-described configuration can be attached in a state where it is difficult to be displaced with respect to the pipe cutter.

The pipe cutter which concerns on this invention connects the 1st support part, the 2nd support part which opposes this 1st support part at intervals, and the end of said 1st support part, and the end of said 2nd support part A pipe including a connecting portion and introduced from between the other end of the first support portion and the other end of the second support portion can be disposed between the first support portion and the second support portion. A pipe receiving member disposed between the first support portion and the second support portion and supported by the first support portion; the first support portion and the second support portion; A roller blade that is disposed between and supported by the second support portion and that is rotatable about an axis extending in the same direction as the center of the pipe received by the pipe receiving member, and outward from the frame. Including a projecting operation portion, and either one of the pipe receiving member or the roller blade is opposed to the other. A roller blade having a cutting edge cover portion that covers a part of the cutting edge of the roller blade that is exposed from between the other end of the first support portion and the other end of the second support portion. And a cover.

  In the pipe cutter frame, since the first support part, the second support part, and the connecting part exist outside most of the cutting edge of the roller blade, there is a possibility that the operator may touch the cutting edge of the roller blade of that part. Very few.

  And according to the pipe cutter of the said structure, the blade edge | tip cover part which covers a part of blade edge | tip of the said roller blade exposed from between the other end of a 1st support part and the other end of a said 2nd support part is provided. Therefore, as a result, the frame and the blade edge cover part are present outside the substantially entire circumference of the blade edge of the roller blade, and the exposure of the blade edge of the roller blade is prevented.

  Therefore, according to the above configuration, when cutting the pipe, the cutting edge of the roller blade is not exposed to the outside even if the entire pipe cutter is rotated around the pipe by an operation on the operation portion. Therefore, according to the pipe cutter of the said structure, it can prevent that an operator contacts the blade edge | tip of a roller blade.

  As one aspect of the present invention, the roller blade cover further includes a pair of extending portions extending from both ends of the blade edge cover portion, and the operating mechanism portion is disposed on both sides of the roller blade in the axial direction. A pair of shaft support portions, and a shaft body that can be inserted and removed with respect to the roller blade and the pair of shaft support portions, with at least one end projecting outward from at least one of the pair of shaft support portions, And a pair of extending portions provided with a space capable of interposing the pair of shaft support portions, wherein at least one of the pair of extending portions is the It may be possible to engage with an end portion of the shaft body protruding from the shaft support portion.

  According to this configuration, the pair of extending portions extend on both sides of the pair of shaft support portions, and at least one of the pair of extension portions engages with the end portion of the shaft body protruding from the shaft support portion. Thereby, the movement of the shaft body to the engagement side is restricted, and the shaft body is prevented from coming off from the shaft support portion.

  On the other hand, when the engagement between the extension portion and the end portion of the shaft body is released, the restriction on the movement of the shaft body is released, and the end portion of the shaft body protruding from the shaft support portion (the end portion on the engagement side) ) Side, the shaft is ready to be removed from the shaft support. Along with this, the roller blade is separated from the pair of shaft support portions by the shaft body being extracted from the shaft support portions. Therefore, if the above configuration is adopted, the roller blade can be replaced.

  As another aspect of the present invention, the shaft body may pass through the roller blade and the pair of shaft support portions so as to be insertable / removable, and may project both end portions outward from the pair of shaft support portions.

  According to this structure, a pair of extension part engages with the both ends of the shaft body which protruded from the pair of shaft support part. Thereby, the movement of the shaft body is restricted, and the shaft body is more reliably prevented from being detached from the shaft support portion. Further, the shaft body can be pulled out from the shaft support portion on each end side.

As another aspect of the present invention, each of the pair of extending portions may have a concave portion that is recessed toward the opposite side of the pipe receiving member at the end on the pipe receiving member side.

  According to this structure, it can prevent that the pipe arrange | positioned between a pipe receiving member and a roller blade interferes with an extension part. Specifically, when cutting the pipe, the amount of biting of the blade edge of the roller blade with respect to the pipe is increased by relatively bringing the pipe receiving member and the roller blade close to each other. At this time, the extension part also approaches the pipe receiving member together with the roller blade, but the pipe enters the recess formed in the extension part. Therefore, even if the amount of biting of the blade edge of the roller blade with respect to the pipe increases, the pair of extending portions do not interfere with the pipe, and the pipe is reliably cut.

  As another aspect of the present invention, the pair of extending portions are guide portions that are guided by end portions of the shaft body, and are formed on surfaces of the pair of extending portions that face each other. You may have the guide part open | released on the outer edge of the extension part.

  According to this configuration, the guide portion is guided by the end portion of the shaft body fitted from the open portion of the guide portion. Thereby, a blade edge | tip cover part can be guide | induced to the appropriate position which covers the blade edge | tip of a roller blade, and can be positioned.

  As another aspect of the present invention, the pair of extending portions are fitting recesses formed on surfaces of the pair of extending portions facing each other, and the fitting recesses into which the end portions of the shaft body are fitted. You may have.

  According to this configuration, when the fitting concave portion is fitted to the end portion of the shaft body, the extension portion is restricted from moving in the direction orthogonal to the axis of the shaft body. Therefore, in the pipe cutter having the above-described configuration, the roller blade cover is prevented from being carelessly removed.

  As another aspect of the present invention, the roller blade cover extends from an end portion on the pipe receiving member side toward the other extension portion in at least one extension portion of the pair of extension portions. It is a protrusion, Comprising: You may have a protrusion along the edge part by the side of the pipe receiving member of the said axial support part.

  According to this configuration, since the projecting piece hits the end of the shaft support portion on the pipe receiving member side, even if the extension portion tries to rotate around the shaft body, the rotation is prevented. Therefore, in the pipe cutter having the above-described configuration, the roller blade cover is attached in a state in which it is difficult to be displaced with respect to the pipe cutter.

  As described above, according to the present invention, it is possible to provide a roller blade cover and a pipe cutter for a pipe cutter that can prevent an operator from coming into contact with the blade edge of the roller blade and can improve safety.

FIG. 1 is a front view of a pipe cutter according to first and second embodiments of the present invention. FIG. 2 is a cross-sectional view of the pipe cutter according to the embodiment. FIG. 3 is a perspective view of the roller blade cover according to the embodiment. 4 is a cross-sectional view of the roller blade cover according to the embodiment at the position of the line IV-IV in FIG. 3. FIG. 5 is a cross-sectional view around the roller blade cover according to the embodiment at the position of the VV line in FIG. 1. FIG. 6 is a cross-sectional view around the roller blade cover according to the embodiment at the position of the VI-VI line in FIG. 1. FIG. 7 is a perspective view of a roller blade cover according to another embodiment. FIG. 8 is a cross-sectional view around the roller blade cover according to another embodiment at the position of the VI-VI line in FIG. 1. FIG. 9 is a front view of a conventional pipe cutter.

  Hereinafter, a roller blade cover for a pipe cutter according to a first embodiment of the present invention will be described with reference to FIGS.

  A roller blade cover 1 for a pipe cutter according to the present embodiment (hereinafter sometimes simply referred to as “roller blade cover 1”) is attached to a pipe cutter 2 used for cutting a pipe P. Below, first, the pipe cutter 2 to which the roller blade cover 1 for the pipe cutter is attached will be described. As shown in FIG. 1, the pipe cutter 2 includes a frame 3, a pipe receiving member 4, a roller blade 5, and an operation mechanism unit 6. The pipe cutter 2 also includes a spacer 51 (see FIG. 5) arranged so as to sandwich the roller blade 5 therebetween.

  As shown in FIG. 2, the frame 3 includes a first support portion 31, a second support portion 32 that faces the first support portion 31 with a space therebetween, and one end of the first support portion 31 and the second support portion 32. The pipe P introduced from between the other end of the first support portion 31 and the other end of the second support portion 32 is connected to the first support portion 31 and the second support portion. It is formed so as to be capable of being arranged between the portion 32. In the frame 3, the connecting portion 33 is closed between one ends of the first support portion 31 and the second support portion 32. The frame 3 has a pipe P in a region surrounded by the frame 3 from between the other end of the first support portion 31 (right end in FIG. 2) and the other end of the second support portion 32 (right end in FIG. 2). Placement (introduction) is possible. The frame 3 connects the pipe receiving member 4 and the operation mechanism unit 6. In the frame 3 of the present embodiment, the pipe receiving member 4 is connected to the first support portion 31, and the operation mechanism portion 6 is connected to the second support portion 32.

  The pipe receiving member 4 is disposed between the first support portion 31 and the second support portion 32 and supported by the first support portion 31. The pipe receiving member 4 receives (supports) the pipe P so as to be rotatable around the center C of the pipe P. The pipe receiving member 4 of the present embodiment is a plurality (two in the example of the present embodiment) of rotating rollers 40 provided on the first support portion 31 of the frame 3. Each rotating roller 40 includes a roller body 41 having a cylindrical outer peripheral surface and a rotating shaft 42. The roller body 41 is rotatable around the rotation shaft 42. The plurality of rotating rollers 40 are arranged such that the rotating shafts 42 are parallel to each other. The pipe receiving member 4 is configured such that the outer peripheral surface of the pipe P is in contact with (contacts with) the outer peripheral surface of each roller body 41, and the rotation shaft 42 of each rotary roller 40 and the center C of the pipe P are in parallel. Receive P.

  The roller blade 5 is disposed between the first support portion 31 and the second support portion 32 and is supported by the second support portion 32. In the present embodiment, the roller blade 5 is supported by the second support portion 32 via the operation mechanism portion 6. The roller blade 5 is provided so as to be rotatable around an axis Cp extending in the same direction as the center C of the pipe P received by the pipe receiving member 4. The roller blade 5 is a disk-shaped blade. The roller blade 5 has a blade edge at the outer edge.

  As shown in FIG. 5, the spacer 51 is disposed in a slit-like gap formed between a pair of shaft support portions 62 described later with the roller blade 5 interposed therebetween. The spacer 51 is a disk-shaped plate member.

  Returning to FIGS. 1 and 2, the operation mechanism unit 6 includes an operation unit 61 protruding outward from the frame 3. Further, the operating mechanism section 6 penetrates the pair of shaft support portions 62 disposed on both sides of the roller blade 5 and the roller blade 5 and the pair of shaft support portions 62 so as to be insertable / removable in the direction of the axis Cp. A shaft body 63 that protrudes outward from the shaft support 62 and includes a shaft body 63 that serves as a rotation center of the roller blade 5. In the present embodiment, the operating mechanism 6 has a slide shaft 64 that extends from the shaft support 62 toward the opposite side of the pipe receiving member 4.

  The operation mechanism unit 6 brings either the pipe receiving member 4 or the roller blade 5 into contact with or separated from the other. Specifically, the operating mechanism unit 6 moves the pipe receiving member 4 and the roller blade 5 relative to each other, and changes the interval between the pipe receiving member 4 and the roller blade 5.

  The operation unit 61 can rotate around the central axis of the slide shaft portion 64. The operation part 61 of this embodiment makes the roller blade 5 contact / separate with respect to the pipe receiving member 4 by rotating operation (arrow direction in FIG. 2). Specifically, the slide shaft portion 64 moves forward and backward with respect to the pipe receiving member 4 by rotating the operation portion 61. Along with this, the pair of shaft support portions 62 advance and retreat with respect to the pipe receiving member 4 to bring the roller blade 5 into and out of contact with the pipe receiving member 4. The operation unit 61 includes a rotatable rotation shaft portion 65 and a grip 66 that rotates the rotation shaft portion 65. In addition, the operation unit 61 includes a transmission member 67 that transmits the rotation operation of the grip 66 to the rotation shaft unit 65.

  The pair of shaft support portions 62 are formed so as to extend to both ends of the roller blade 5. The pair of shaft support portions 62 are arranged so as to form a slit-like gap between the pair of shaft support portions 62. In other words, the pair of shaft support portions 62 are opposed to each other with the roller blade 5 interposed therebetween in the direction of the axis Cp. The pair of shaft support portions 62 holds the shaft body 63 so that the roller blade 5 can rotate around the axis Cp (rotation axis). The pair of shaft support portions 62 holds the shaft body 63 by supporting both end portions of the shaft body 63 that penetrates the pair of shaft support portions 62. In the present embodiment, each of the pair of shaft support portions 62 is a substantially rectangular plate member.

  The shaft body 63 extends in the direction of the axis Cp. The shaft body 63 is formed in such a length that both end portions thereof protrude outward from the pair of shaft support portions 62. The shaft body 63 has a cylindrical shape. In the present embodiment, the shaft body 63 passes through the rotation center of the roller blade 5, the pair of spacers 51 that sandwich the roller blade 5, and the pair of shaft support portions 62. The shaft body 63 includes the roller blade 5 and the pair of spacers. 51 and the pair of shaft support portions 62 are detachable. That is, the shaft 63 can be detached from the pipe cutter 2. As the shaft body 63 is removed, the roller blade 5 and the pair of spacers 51 are removed from the shaft support portion 62.

  The slide shaft portion 64 is a portion extending from the shaft support portion 62. An operation portion 61 is provided at the distal end of the slide shaft portion 64, and a shaft support portion 62 is provided at the proximal end of the slide shaft portion 64. The slide shaft portion 64 is provided with a screw hole 641 extending from the tip thereof toward the shaft support portion 62.

  The rotation shaft portion 65 extends in the central axis direction of the slide shaft portion 64 and can rotate around the center axis, and the tip of the rotation shaft portion main body 651 (on the slide shaft portion 64 side). And a screw portion 652 that is provided at the end portion and is screwed into the screw hole 641 of the slide shaft portion 64. Thus, since the screw portion 652 of the rotation shaft portion 65 is screwed into the screw hole 641 of the slide shaft portion 64, the rotation shaft portion 65 rotates around the central axis, so that the rotation shaft portion. The slide shaft portion 64 moves (slides) in the direction of the central axis with respect to 65.

  In the operating mechanism 6, the grip 66 is provided so as to be rotatable around the central axis of the slide shaft 64.

  The transmission member 67 is a plate-like member that extends in a direction orthogonal to the central axis of the slide shaft portion 64, and is fixed to the other end of the rotation shaft portion 65.

  Next, a roller blade cover for a pipe cutter according to this embodiment will be described with reference to FIGS. The roller cutter cover 1 for the pipe cutter is attached to the pipe cutter 2 described above.

  The roller blade cover 1 for a pipe cutter has a cutting edge of the roller blade 5 exposed from the other end (right end in FIG. 2) of the first support portion 31 and the other end (right end in FIG. 2) of the second support portion 32. Is provided with a blade edge cover portion 12 that covers a part of the blade edge cover portion 12. The roller blade cover 1 includes a pair of extending portions 13 that extend from both ends of the blade edge cover portion 12. The roller blade cover 1 is formed of an easily deformable elastic member. Further, the roller blade cover 1 is configured so that it can be attached to and detached from the pipe cutter 2 manually.

  The roller blade cover 1 is composed of three pieces of a blade edge cover portion 12 and a pair of extending portions 13. The pair of extending portions 13 extends from the blade edge cover portion 12 so as to be substantially orthogonal to the blade edge cover portion 12. That is, the pair of extending portions 13 are opposed to each other.

  As shown in FIGS. 3 to 5, the blade edge cover portion 12 includes a blade edge housing portion 121 that houses the blade edge of the roller blade 5 and a positioning portion 122 that determines the position of the blade edge of the roller blade 5. The blade edge accommodating portion 121 is formed to be curved so as to correspond to the blade edge of the roller blade 5 formed in a disk shape. In this embodiment, the roller blade cover 1 is pushed into the pipe cutter 2 from the second end 136 side of the extension portion 13 described later. The positioning unit 122 restricts the roller blade cover 1 from approaching the blade edge of the roller blade 5 more than necessary. That is, when the roller blade cover 1 is pushed more than necessary with respect to the cutting edge of the roller blade 5, the positioning portion 122 is a regulating surface S that is a surface opposite to the surface facing the connecting portion 33 in the shaft support portion 62. (Refer to FIG. 5). This prevents the roller blade cover 1 from being pushed. Therefore, the cutting edge of the roller blade 5 and the roller blade cover 1 can be prevented from coming into contact with each other and the cutting edge of the roller blade 5 can be prevented from being damaged.

  The pair of extending portions 13 are provided at an interval at which the pair of shaft support portions 62 can be interposed. That is, the pair of extending portions 13 are formed so that the pair of shaft support portions 62 can be disposed therebetween. Further, the pair of extending portions 13 can be engaged with both end portions of the shaft body 63 protruding from the pair of shaft support portions 62. That is, the pair of extending portions 13 extends from both ends of the blade edge cover portion 12 so as to cover both end portions of the shaft body 63 in the extending direction of the shaft body 63. The roller blade cover 1 is supported by the pipe cutter 2 by the opposing surface of the extending portion 13 engaging the shaft body 63.

  As shown in FIG. 3, the pair of extending portions 13 includes a first end 135 shared with the blade edge cover portion 12, a second end 136 facing the first end 135, a first end 135, and a second end. 136 is a substantially rectangular plate-shaped member defined by a third end 137 and a fourth end 138 extending in a direction substantially orthogonal to 136. In the present embodiment, the third end 137 exposes the cutting edge of the roller blade 5 facing the pipe receiving member 4 side.

  Further, as shown in FIG. 5, the second end 136 of the extending portion 13 extends to the frame 3 side from the cutting edge of the roller blade 5 exposed to the frame 3 side. Thereby, the cutting edge of the roller blade 5 facing the connecting portion 33 side is hidden in the extending portion 13. Therefore, when the roller blade cover 1 is removed from the pipe cutter 2 with a finger attached to the second end 136 of the roller blade cover 1, the operator's hand and the blade edge of the roller blade 5 are difficult to contact.

  Each of the pair of extending portions 13 has a recessed portion 131 that is recessed toward the opposite side to the pipe receiving member 4 at the end on the pipe receiving member 4 side. In the present embodiment, the recess 131 is formed at the third end 137 of the extension 13. As shown in FIGS. 3 and 4, the recess 131 is formed in a substantially arc shape corresponding to the shape of the pipe P.

  The pair of extending portions 13 are guide portions 132 that are guided by the end portions of the shaft body 63, and include guide portions 132 that are formed on surfaces of the pair of extending portions 13 that face each other. Specifically, the guide portion 132 is a surface that defines the groove 150 guided by the end portion of the shaft body 63. In the present embodiment, the guide portion 132 includes a first guide surface 155 formed along the extended portion 13, a second guide surface 156 formed continuously at a substantially right angle to the first guide surface 155, and a third guide surface 155. And a guide surface 157. The second guide surface 156 and the third guide surface 157 are opposed to each other. The guide part 132 is formed in a rectangular shape. The thickness of the portion of the extension portion 13 where the first guide surface 155 to the third guide surface 157 are formed is substantially the same as the thickness of other portions of the extension portion 13.

  The first guide surface 155 is guided to the end surface of the shaft body 63. The second guide surface 156 and the third guide surface 157 are guided to the outer peripheral surface of the end portion of the shaft body 63. That is, the second guide surface 156 and the third guide surface 157 are each guided to the outer peripheral surface of the shaft body 63 by sandwiching the shaft body 63 on both sides in the radial direction.

  The guide part 132 is open on the outer edges of the pair of extending parts 13. The end portion of the shaft body 63 guides the guide portion 132 from above the outer edge. In addition, the guide part 132 extends in a direction intersecting with an axis passing through the center of curvature of the recess 131. In this embodiment, the guide part 132 is open | released by the 2nd end 136 of a pair of extension part 13, as shown in FIGS. Moreover, the guide part 132 is extended in the direction where the 3rd end 137 (4th end 138) is extended. Therefore, the guide portion 132 is guided from the second end 136 toward the first end 135, and stops when the positioning portion 122 is along the regulation surface S of the pair of shaft support portions 62.

  The guide part 132 of this embodiment also includes an inclined part 134. The inclined portion 134 is formed on a part of the extending portion 13 on the second end 136 side. The inclined portion 134 is formed on the second end 136 side of the extending portion 13 so that the thickness of the guide portion is reduced. The inclined portion 134 is formed such that the interval between the first guide surfaces 155 facing each other is longer than the length of the shaft body 63 on the second end 136 side. Accordingly, the end portion of the shaft body 63 is easily fitted into the guide portion 132. Therefore, the end portion of the shaft body 63 can easily guide the guide portion 132 to a predetermined position.

  The pair of extending portions 13 has a fitting recess 133 formed on the opposing surfaces of the pair of extending portions 13. The end of the shaft body 63 is fitted into the fitting recess 133. The fitting recess 133 has a first fitting surface 165 formed along the extending portion 13 and a second fitting surface 166 formed continuously at a substantially right angle to the first fitting surface 165. The first fitting surface 165 constitutes the bottom surface of the fitting recess 133, and the second fitting surface 166 constitutes the side surface of the fitting recess 133. In the present embodiment, the fitting recess 133 is connected to the guide portion 132. Specifically, the fitting recess 133 is connected to the guide portion 132 so that the first guide surface 155 of the guide portion 132 and the second fitting surface 166 of the fitting recess 133 are substantially perpendicular to each other. The thickness of the portion where the first fitting surface 165 and the second fitting surface 166 are formed in the extended portion 13 and the thickness of other portions of the extended portion 13 are substantially the same.

  In the present embodiment, the fitting recess 133 is connected to the end of the guide portion 132 on the first end 135 side. Accordingly, the shaft body 63 is guided by the guide portion 132 and is fitted to the fitting recess 133. When the end of the shaft body 63 is fitted with the fitting recess 133, the second fitting surface 166 surrounds the outer peripheral surface of the shaft body 63. Therefore, the extension part 13 is restricted from moving in the direction orthogonal to the axis Cp. The fitting recess 133 may have any shape that can be fitted to the shaft body 63. As shown in FIG. 4, in the present embodiment, the fitting recess 133 has a substantially rectangular shape.

  In the present embodiment, the guide portion 132 is inclined over the entire region so that the depth of the guide portion 132 becomes shallower from the second end 136 toward the first end 135. For this reason, the first guide surface 155 of the extending portion 13 is in a posture away from the first fitting surface 165 of the fitting recess 133 in the direction of the axis Cp toward the first end 135 side. Therefore, the end portion of the shaft body 63 is surrounded by the second fitting surface 166 of the fitting recess 133 at a position where the guide portion 132 and the fitting recess 133 are continuously provided. Therefore, the end portion of the shaft body 63 and the fitting recess 133 are securely fitted, and the roller blade cover 1 is not easily detached from the pipe cutter 2. In the present embodiment, the guide portion 132 is inclined such that the inclination in the direction from the second end 136 toward the first end 135 is gentler than the inclination in the same direction in the inclined portion 134.

  The roller blade cover 1 is a projecting piece 14 that extends from an end on the pipe receiving member 4 side toward the other extending portion 13 in at least one extending portion 13 of the pair of extending portions 13. The projecting piece 14 is provided along the end of the shaft support 62 on the pipe receiving member 4 side. A pair of protruding pieces 14 according to the present embodiment are provided on the first end 135 side and the second end 136 side of the third end 137 of the extending portion 31. The projecting piece 14 is formed in a substantially rectangular plate shape.

  Hereinafter, the pipe cutter concerning 2nd embodiment of this invention is demonstrated, referring FIG.

  The pipe cutter according to the present embodiment is used for cutting a pipe. As shown in FIG. 1, the pipe cutter 22 includes a frame 3, a pipe receiving member 4, a roller blade 5, an operation mechanism unit 6, and a roller blade cover 1.

  Since the configuration of the frame 3, the pipe receiving member 4, the roller blade 5, the operation mechanism portion 6, and the roller blade cover 1 is the same as that of the first embodiment, the same reference numerals are given, and redundant description will not be repeated. .

  Next, a procedure for cutting the pipe P using the pipe cutter 2 to which the roller blade cover 1 according to the first embodiment is attached or the pipe cutter 22 according to the second embodiment will be described.

First, the pipe P is disposed on the pipe receiving member 4. With the pipe receiving member 4 receiving the pipe P, the grip 66 is rotated clockwise as viewed from the grip 66 toward the pipe receiving member 4. At this time, the slide shaft portion 64 moves to the pipe receiving member 4 side by rotating the rotation shaft portion 65 (screw portion 652). As a result, the roller blade 5 approaches the pipe P. Therefore, the roller blade 5 and the pipe P can be brought into contact with each other with the roller blade cover 1 attached to the pipe cutters 2 and 22.

  When the roller blade 5 comes into contact with the pipe P, the grip 66 is further rotated clockwise by a predetermined amount from that point. In this state, the entire pipe cutters 2 and 22 are rotated in the circumferential direction of the pipe P (around the center C of the pipe P). As a result, the outer edge (blade edge) of the roller blade 5 is pressed against the pipe P with a predetermined force while rotating (revolving) in the circumferential direction along the outer peripheral surface of the pipe P. The roller blade 5 itself rotates (spins), and the pipe P is cut.

  Next, a procedure for replacing the roller blade 5 will be described.

  First, the roller blade cover 1 is removed from the pipe cutters 2 and 22. At this time, a finger is put on each of the second ends 136 of the pair of extending portions 13 until the end portion of the shaft body 63 fitted in the fitting recess 133 is in a position where it is released from the fitting recess 133. The roller blade cover 1 is spread in the direction of the arrow shown in FIG. In the present embodiment, the roller blade cover 1 can be easily spread by placing a finger on the edge of the guide portion 132 on the second end 136 side. And the extension part 13 is slid with respect to the shaft 63 so that the guide part 132 is guided to the opposite side to the connection part 33, and the roller blade cover 1 is removed from the 2nd end 136 side.

  Next, the shaft body 63 is pulled out from the pipe cutters 2 and 22 by pulling out any one of both end portions of the shaft body 63 from the roller blade 5, the spacer 51, and the shaft support portion 62. Accordingly, the roller blade 5 and the spacer 51 are separated from the shaft support portion 62, and the roller blade 5 can be replaced.

  In a state where the new roller blade 5 is sandwiched between the spacers 51, the roller blade 5 is sandwiched between the pair of shaft support portions 62. The shaft body 63 is passed through the roller blade 5, the spacer 51, and the pair of shaft support portions 62. Both end portions of the shaft body 63 are projected (extruded) from the shaft support portion 62. The pair of extending portions 13 of the roller blade cover 1 are gripped and the roller blade cover 1 is pushed into the pipe cutter 2. In the present embodiment, the roller blade cover 1 is pushed in with both end portions of the shaft body 63 engaged with the guide portion 132 from the second end 136 side of the extending portion 13. The end of the shaft body 63 is fitted into the fitting recess 133 while the guide portion 132 is guided by the shaft body 63. As a result, the roller blade cover 1 is attached to the pipe cutters 2 and 22. Thus, in this embodiment, the roller blade 5 can be easily replaced without using a special tool.

  As described above, the roller blade cover 1 for a pipe cutter according to the first embodiment includes the first support portion 31, the second support portion 32 that faces the first support portion 31 with a space therebetween, and the first support. A pipe P that includes a connecting portion 33 that connects one end of the portion 31 and one end of the second support portion 32 and is introduced from between the other end of the first support portion 31 and the other end of the second support portion 32. The first support portion 31 is disposed between the first support portion 31 and the second support portion 32 and the first support portion 31 is disposed between the first support portion 31 and the second support portion 32. Same as the center C of the pipe P that is disposed between the supported pipe receiving member 4, the first support part 31 and the second support part 32 and supported by the second support part 32 and received by the pipe receiving member 4. The roller blade 5 provided rotatably around the axis Cp extending in the direction and protruded outward from the frame 3 A roller blade cover 1 for a pipe cutter that includes an operation portion 61 and includes an operation mechanism portion 6 that contacts or separates either the pipe receiving member 4 or the roller blade 5 with respect to the other, the first support portion 31. The blade edge | tip cover part 12 which covers a part of blade edge | tip of the roller blade 5 exposed from between the other end of this and the other end of the 2nd support part 32 is provided.

  In the frame 3 of the pipe cutter 2 that is the premise of the roller cutter cover 1 for the pipe cutter, the first support portion 31, the second support portion 32, and the connecting portion 33 exist outside most of the cutting edge of the roller blade 5. Therefore, there is very little possibility that the operator touches the blade edge of the roller blade 5 at that portion.

  And according to the roller blade cover 1 for pipe cutters of the said structure, a part of blade edge | tip of the roller blade 5 exposed from between the other end of the 1st support part 31 and the other end of the 2nd support part 32 is covered. Since the blade edge cover portion 12 is provided, as a result, the frame 3 and the blade edge cover portion 12 exist outside the substantially entire circumference of the blade edge of the roller blade 5 of the pipe cutter 2, and the edge of the roller blade 5 is exposed. Is blocked.

  Therefore, according to the above configuration, when cutting the pipe P with the pipe cutter 2, the cutting edge of the roller blade 5 may be exposed to the outside even if the entire pipe cutter 2 is rotated around the pipe P by operating the operation unit 61. Absent. Therefore, according to the roller blade cover 1 for a pipe cutter having the above-described configuration, the operator can be prevented from coming into contact with the blade edge of the roller blade 5.

  In the present embodiment, a pair of extending portions 13 extending from both ends of the blade edge cover portion 12 is further provided, and the operating mechanism portion 6 is a pair of shaft support portions 62 disposed on both sides of the roller blade 5 in the axis Cp direction. A shaft body 63 that penetrates the roller blade 5 and the pair of shaft support portions 62 so as to be insertable / removable and projects both end portions outward from the pair of shaft support portions 62, and serves as a rotation center of the roller blade 5. The pair of extending portions 13 are provided at an interval at which the pair of shaft support portions 62 can be interposed, and the pair of extension portions 13 are both ends of the shaft body 63 protruding from the pair of shaft support portions 62. It is possible to engage with the part.

  According to this configuration, the pair of extending portions 13 extend on both sides of the pair of shaft support portions 62, and the pair of extension portions 13 engage with both end portions of the shaft body 63 protruding from the pair of shaft support portions 62. To do. Thereby, the movement of the shaft body 63 is restricted, and the shaft body 63 is prevented from being detached from the shaft support portion 62.

  On the other hand, when the engagement between the pair of extending portions 13 and the end portions of the shaft body 63 is released, the restriction on the movement of the shaft body 63 is released, and the shaft body 63 can be removed from the shaft support portion 62. become. Accordingly, the shaft body 63 is extracted from the shaft support portion 62, so that the roller blade 5 is separated from the pair of shaft support portions 62. Therefore, if the above configuration is adopted, the roller blade 5 can be replaced.

  In the present embodiment, each of the pair of extending portions 13 has a recess 131 that is recessed toward the opposite side of the pipe receiving member 4 at the end on the pipe receiving member 4 side.

  According to such a configuration, it is possible to prevent the pipe P disposed between the pipe receiving member 4 and the roller blade 5 from interfering with the extending portion 13. Specifically, when cutting the pipe P, the pipe receiving member 4 and the roller blade 5 are relatively brought close to each other, so that the amount of biting of the blade edge of the roller blade 5 with respect to the pipe P is increased. At this time, the extension 13 also approaches the pipe receiving member 4 together with the roller blade 5, but the pipe P enters the recess 131 formed in the extension 13. Therefore, even if the amount of biting of the blade edge of the roller blade 5 with respect to the pipe P increases, the pair of extending portions 13 can be prevented from interfering with the pipe P.

  In the present embodiment, the pair of extending portions 13 are guide portions 132 that are guided by the end portions of the shaft body 63, and are formed on surfaces facing each other of the pair of extending portions 13. It has a guide part 132 opened on the outer edge of the part 13.

  According to such a configuration, the guide portion 132 is guided by the end portion of the shaft body 63 fitted from the open portion of the guide portion 132. Thereby, the blade edge | tip cover part 12 can be guide | induced to the appropriate position which covers the blade edge | tip of the roller blade 5, and can be positioned.

  In the present embodiment, the pair of extending portions 13 are fitting recesses 133 formed on the opposing surfaces of the pair of extending portions 13, and the fitting recesses 133 into which the ends of the shaft body 63 are fitted. have.

  According to this configuration, when the fitting recess 133 is fitted to the end portion of the shaft body 63, the extension portion 13 is restricted from moving in the direction orthogonal to the axis Cp of the shaft body 63. Therefore, the roller blade cover 1 for a pipe cutter having the above-described configuration is prevented from being inadvertently removed while being mounted on the pipe cutter 2.

In the present embodiment, the roller blade cover 1 for a pipe cutter is directed from the end on the pipe receiving member 4 side toward the other extending portion 13 in at least one extending portion 13 of the pair of extending portions 13. The projecting piece 14 extends and has a projecting piece 14 along the end of the shaft support portion 62 on the pipe receiving member 4 side.

  According to such a configuration, since the projecting piece 14 hits the end of the shaft support portion 62 on the pipe receiving member 4 side, even if the extension portion 13 tries to rotate around the shaft body 63, the rotation is prevented. Therefore, the roller blade cover 1 for a pipe cutter having the above-described configuration can be attached to the pipe cutter 2 in a state where it is difficult to be displaced.

The pipe cutter 22 according to the second embodiment includes a first support portion 31, a second support portion 32 that faces the first support portion 31 with a gap, and one end of the first support portion 31 and the second support portion 32. The pipe P introduced from between the other end of the first support portion 31 and the other end of the second support portion 32 is connected to the first support portion 31 and the second support portion. A frame 3 formed so as to be disposed between the first support portion 31 and the second support portion 32, and a pipe receiving member 4 supported by the first support portion 31. It arrange | positions between the one support part 31 and the 2nd support part 32, is supported by the 2nd support part 32, and can rotate freely around the axis Cp extended in the same direction as the center C of the pipe P received by the pipe receiving member 4. A pipe receiving member including a roller blade 5 provided and an operation portion 61 protruding outward from the frame 3 Alternatively, the cutting edge of the roller blade 5 exposed from between the operating mechanism portion 6 that contacts or separates one of the roller blades 5 with respect to the other, and the other end of the first support portion 31 and the other end of the second support portion 32. A roller blade cover 1 having a blade edge cover portion 12 that covers a part of the roller blade cover 1.

  In the frame 3 of the pipe cutter 2, the first support portion 31, the second support portion 32, and the connecting portion 33 exist outside most of the cutting edge of the roller blade 5. There is very little possibility that the operator will touch the

  And according to the pipe cutter 22 of the said structure, the blade edge | tip cover part 12 which covers a part of blade edge of the roller blade 5 exposed from between the other end of the 1st support part 31 and the other end of the 2nd support part 32 is provided. As a result, the frame 3 and the blade edge cover portion 12 exist outside the substantially entire circumference of the blade edge of the roller blade 5 of the pipe cutter 22, so that the exposure of the edge of the roller blade 5 is prevented.

  Therefore, according to the above configuration, when cutting the pipe P with the pipe cutter 22, the cutting edge of the roller blade 5 may be exposed to the outside even if the entire pipe cutter 22 is rotated around the pipe P by an operation on the operation unit 61. Absent. Therefore, according to the pipe cutter 22 having the above-described configuration, the operator can be prevented from coming into contact with the cutting edge of the roller blade 5.

  In the present embodiment, the roller blade cover 1 further includes a pair of extending portions 13 extending from both ends of the blade edge cover portion 12, and the operation mechanism portion 6 is disposed on both sides of the roller blade 5 in the axis Cp direction. A shaft body 63 that penetrates the roller blade 5 and the pair of shaft support portions 62 so as to be insertable / removable, and projects both ends outward from the pair of shaft support portions 62. And a pair of extending portions 13 provided at a distance allowing the pair of shaft supporting portions 62 to be interposed therebetween, and the pair of extending portions 13 project from the pair of shaft supporting portions 62. It is possible to engage with both ends of the shaft body 63 to be engaged.

  According to this configuration, the pair of extending portions 13 extend on both sides of the pair of shaft support portions 62, and the pair of extension portions 13 engage with both end portions of the shaft body 63 protruding from the pair of shaft support portions 62. To do. Thereby, the movement of the shaft body 63 is restricted, and the shaft body 63 is prevented from being detached from the shaft support portion 62.

  On the other hand, when the engagement between the pair of extending portions 13 and the end portions of the shaft body 63 is released, the restriction on the movement of the shaft body 63 is released, and the shaft body 63 can be removed from the shaft support portion 62. become. Accordingly, the shaft body 63 is extracted from the shaft support portion 62, so that the roller blade 5 is separated from the pair of shaft support portions 62. Therefore, if the above configuration is adopted, the roller blade 5 can be replaced.

  In the present embodiment, each of the pair of extending portions 13 has a recess 131 that is recessed toward the opposite side of the pipe receiving member 4 at the end on the pipe receiving member 4 side.

  According to such a configuration, it is possible to prevent the pipe P disposed between the pipe receiving member 4 and the roller blade 5 from interfering with the extending portion. Specifically, when cutting the pipe P, the amount of biting of the blade edge of the roller blade 5 with respect to the pipe P is increased by relatively approaching the pipe receiving member and the roller blade 5. At this time, the extension 13 also approaches the pipe receiving member 4 together with the roller blade 5, but the pipe P enters the recess 131 formed in the extension 13. Therefore, even if the amount of biting of the blade edge of the roller blade 5 with respect to the pipe P increases, the pair of extending portions 13 do not interfere with the pipe P, and the pipe P is reliably cut.

  In the present embodiment, the pair of extending portions 13 are guide portions 132 that are guided by the end portions of the shaft body 63, and are formed on surfaces facing each other of the pair of extending portions 13. A guide part 132 opened on the outer edge of the part 13 is provided.

  According to such a configuration, the guide portion 132 is guided by the end portion of the shaft body 63 fitted from the open portion of the guide portion 132. Thereby, the blade edge | tip cover part 12 can be guide | induced to the appropriate position which covers the blade edge | tip of the roller blade 5, and can be positioned.

  In the present embodiment, the pair of extending portions 13 are fitting recesses 133 formed on the opposing surfaces of the pair of extending portions 13, and the fitting recesses 133 into which the ends of the shaft body 63 are fitted. have.

  According to this configuration, when the fitting recess 133 is fitted to the end portion of the shaft body 63, the extension portion 13 is restricted from moving in the direction orthogonal to the axis Cp of the shaft body 63. Therefore, in the pipe cutter 22 having the above-described configuration, the roller blade cover 1 is prevented from being carelessly removed.

  In this embodiment, the roller blade cover 1 is a protrusion that extends from the end on the pipe receiving member 4 side toward the other extending portion 13 in at least one extending portion 13 of the pair of extending portions 13. It is the piece 14, Comprising: The protrusion 14 in alignment with the edge part by the side of the pipe receiving member 4 of the axial support part 62 is provided.

  According to such a configuration, since the projecting piece 14 hits the end of the shaft support portion 62 on the pipe receiving member 4 side, even if the extension portion 13 tries to rotate around the shaft body 63, the rotation is prevented. Therefore, in the pipe cutter 22 having the above-described configuration, the roller blade cover 1 is attached in a state in which it is difficult to be displaced with respect to the pipe cutter 22.

  In addition, the roller blade cover 1 and the pipe cutter 22 for the pipe cutter of the present invention are not limited to the above-described embodiments, and it is needless to say that various changes can be made without departing from the gist of the present invention. .

  In the said embodiment, although the roller blade cover 1 demonstrated the case where it attached or removed from the 2nd end 136 side of the extension part 13 with respect to the pipe cutter 2, it is not limited to this. As shown in FIG. 7, the roller blade cover 1 may be attached or removed from the fourth end 138 side of the extending portion 13. In this case, the shaft body 63 guides the guide portion 132 from the fourth end 138 side of the extending portion 13 to the third end 137 side.

  In the said embodiment, although the case where the edge part of the shaft 63 protruded from each of a pair of axial support part 62 was demonstrated, it is not limited to this. As shown in FIG. 8, only one end portion of the shaft body 63 may protrude outward from one shaft support portion 62 of the pair of shaft support portions 62. In this case, the other shaft support portion 62 of the pair of shaft support portions 62 has the other end portion of the shaft body 63 (the end portion that does not protrude outward from the shaft support portion 62) outward of the shaft support portion 62. You may have the control part 622 which controls projecting. The restricting portion 622 may be formed by making the other shaft support portion 62 non-penetrating. In the example shown in FIG. 8, the restricting portion 622 has a concave shape into which the other end of the shaft body 63 is fitted. With this configuration, the shaft body 63 is sandwiched and fixed between the extending portion 13 and the restricting portion 622 in the direction of the axis Cp.

  Further, as shown in FIG. 8, the shaft body 63 includes a shaft body main body 631 configured to be insertable / removable with respect to the roller blade 5 and the pair of shaft support portions 63, and a shaft body main body at the end of the shaft body main body 631. And an engaging portion 632 having a diameter larger than the outer diameter of 631. The engaging portion 632 is a portion that engages with the extending portion 13. In this case, the inner diameter of the insertion hole 621 formed in the shaft support portion 62 for allowing the shaft body main body 631 to be inserted may be smaller than the outer diameter of the engagement portion 632. In this way, the engaging portion 632 is sandwiched and fixed by the extending portion 13 and the shaft support portion 62 in the direction of the axis Cp.

  In the said embodiment, although the shaft 63 demonstrated the case where it was cylindrical shape, it is not limited to this. The shaft body 63 only needs to hold the roller blade 5 on the shaft support portion 62 so as to be rotatable. For example, the shaft 63 may not be a cylindrical shape but may be a polygonal column such as a triangular column or a quadrangular column.

  In this case, the shape of the fitting recess 133 may be a polygonal shape such as a triangle or a quadrangle corresponding to the shape of the shaft 63, and the fitting recess 133 may be approximately the same size as the shaft 63. Thereby, even if the extension part 13 tries to rotate around the shaft body 63, the corner of the shaft body 63 and the corner of the fitting recess 133 are engaged to prevent the rotation. Accordingly, the roller blade cover 1 is attached to the pipe cutter 2 in a state where it is difficult to be displaced.

  The pair of extending portions 13 has been described as having a substantially rectangular shape, but is not limited thereto. The pair of extending portions 13 may be circular, elliptical, triangular, trapezoidal, or the like.

  In the above-described embodiment, each of the pair of extending portions 13 has been described with respect to the case where the end portion on the pipe receiving member 4 side has the recessed portion 131 formed in a substantially arc shape, but the present invention is not limited thereto. It is not a thing. The shape of the recess may be other shapes such as a polygonal shape. Further, each of the pair of extending portions 13 may not have the recess 131.

  In the said embodiment, although the pair of extension part 13 demonstrated the case where it has the guide part 132 and the fitting recessed part 133, it is not limited to this. When the pair of extending portions 13 do not have the guide portion 132 and the fitting recess 133, the width of the pair of extending portions 13 may be partly smaller than the length of the shaft body 63. Good. In this way, when the roller blade cover 1 is attached to the pipe cutter 2, the shaft body 63 is sandwiched with the pair of extending portions 13 spread. That is, since a restoring force acts on the pair of extending portions 13, the shaft support portion 63 is pressed down. Accordingly, the pair of extending portions 13 and the shaft body 63 are reliably engaged, and the roller blade cover 1 is difficult to be displaced with respect to the pipe cutter 2.

  In the said embodiment, although the fitting recessed part 133 demonstrated the case where it was provided in a row by the guide part 132, it is not limited to this. The guide part 132 and the fitting recessed part 133 may each be provided independently.

  In the above embodiment, the roller blade cover 1 is described as being formed of an easily deformable elastic member. However, the roller blade cover 1 is formed so that it can be manually attached to and removed from the pipe cutter 2. If it is, it may be made of metal or the like. For example, an elastic member may be used for the blade edge cover portion 12 and a metal or the like may be used for the extension portion 13. In this case, when the blade edge cover portion 12 is elastically deformed, the pair of extending portions 13 are expanded in the direction of the arrow in FIG.

  In the said embodiment, although the roller blade cover 1 demonstrated the case where it comprised from three pieces of the blade edge | tip cover part 12 and a pair of extension part 13, it is not limited to this. The roller blade cover 1 may be composed of a single piece only by the blade edge cover portion 12. In this case, the blade edge cover portion 12 may be attached to the pipe cutter 2 by being supported by the pair of shaft support portions 62 using a magnet, an adhesive, or the like. In addition, the blade edge cover portion 12 may be formed integrally with the pair of shaft support portions 62. Further, a pair of blade edge cover portions 12 may be provided to face each other. That is, it may be provided on the second end 136 side of the extending portion 13. In this case, the roller blade cover 1 is composed of four pieces, and the blade edge cover portion 12 covers the blade edge of the roller blade 5 exposed on both the introduction side of the pipe P and the frame 3 side.

  In the above embodiment, a case has been described in which the slide shaft portion 64 advances and retreats with respect to the pipe receiving member 4 by rotating the operation portion 61 and the roller blade 5 is brought into contact with and separated from the pipe receiving member 4. It is not limited to this. The configuration may be such that the pipe receiving member 4 advances and retreats with respect to the roller blade 5 by operating the operation portion 61.

DESCRIPTION OF SYMBOLS 1 ... Roller blade cover, 12 ... Blade edge cover part, 121 ... Blade edge accommodating part, 122 ... Position determination part, 13 ... Extension part, 131 ... Recessed part, 132 ... Guide part, 133 ... Fitting recessed part, 134 ... Inclined part, 135 ... first end 136 ... second end 137 ... third end 138 ... fourth end 14 ... projection piece 150 ... groove 155 ... first guide surface 156 ... second guide surface 157 ... first Three guide surfaces, 2, 22 ... pipe cutter, 3 ... frame, 31 ... first support part, 32 ... second support part, 33 ... connecting part, 4 ... pipe receiving member, 40 ... rotating roller, 41 ... roller body, DESCRIPTION OF SYMBOLS 42 ... Rotary shaft, 5 ... Roller blade, 51 ... Spacer, 6 ... Actuation mechanism part, 61 ... Operation part, 62 ... Shaft support part, 621 ... Insertion hole, 622 ... Restriction part, 63 ... Shaft body, 631 ... Shaft body main body 632 ... engaging portion, 64 ... slide shaft portion, 641 ... screw hole, 65 ... rotating shaft portion, DESCRIPTION OF SYMBOLS 51 ... Turning shaft part main body, 652 ... Screw part, 66 ... Grip, 67 ... Transmission member, 90 ... Pipe cutter, 91 ... Frame, 911 ... First support part, 912 ... Second support part, 913 ... Connection part, 92 ... Pipe receiving member, 93 ... Roller blade, 94 ... Actuating mechanism, 941 ... Operation part, P, P1 ... Pipe, S ... Restricting surface, C ... Center of pipe P, Cp ... Axis

A roller blade cover for a pipe cutter according to the present invention includes a first support portion, a second support portion facing the first support portion with a space therebetween, and one end of the first support portion and the second support portion. A pipe including a connecting portion that connects one end to the other end of the first support portion and the other end of the second support portion; A frame formed so as to be disposed between the pipe support member, the pipe support member disposed between the first support portion and the second support portion and supported by the first support portion, and the first support portion. A roller blade disposed between the second support portion, supported by the second support portion, and rotatably provided about an axis extending in the same direction as the center of the pipe received by the pipe receiving member; operating portion projecting outward from the frame, the shaft body as a rotation center of the roller cutter, and the Disposed in the axial direction on both sides of the over La blade includes a pair of shaft support for supporting the shaft body, contact to the other one of the pipe receiving member or the roller cutter by operation of the operating unit A roller blade cover for a pipe cutter including an operating mechanism portion to be separated, wherein a part of the blade edge of the roller blade exposed from between the other end of the first support portion and the other end of the second support portion A pair of extending portions extending from both ends of the blade edge cover portion, the pair of extending portions disposed so that the pair of shaft support portions can be interposed therebetween. And each of the pair of extending portions is configured to be attachable to and detachable from an end portion of a corresponding shaft body .

One aspect of the present invention, the shaft body is removably inserted to the front Symbol roller blades and said pair of shaft support, to protrude outwardly at least one end from at least one of the pair of shaft support, at least one of the previous SL pair of extending portions, may be engageable with the end of the shaft projecting from the shaft support.

The pipe cutter which concerns on this invention connects the 1st support part, the 2nd support part which opposes this 1st support part at intervals, and the end of said 1st support part, and the end of said 2nd support part A pipe including a connecting portion and introduced from between the other end of the first support portion and the other end of the second support portion can be disposed between the first support portion and the second support portion. A pipe receiving member disposed between the first support portion and the second support portion and supported by the first support portion; the first support portion and the second support portion; A roller blade that is disposed between and supported by the second support portion and that is rotatable about an axis extending in the same direction as the center of the pipe received by the pipe receiving member, and outward from the frame. protruding operation part, the center of rotation become axis of said roller blades, and front on either side of the roller blades Disposed axially, and the comprises a pair of shaft support for supporting the shaft body, wherein the operation of the operating unit pipe receiving member or actuating mechanism for contacting and separating with respect to the other one of one of said roller blades, A pair of blade edge cover portions that cover a part of the blade edge of the roller blade exposed from the other end of the first support portion and the other end of the second support portion, and a pair that extends from both ends of the blade edge cover portion. A pair of extending portions that interpose the pair of shaft support portions between each other, and each of the pair of extending portions is attached to and detached from the end portion of the corresponding shaft body A roller blade cover configured to be possible .

One aspect of the present invention, the shaft body is removably inserted to the front Symbol roller blades and said pair of shaft support, to protrude outwardly at least one end from at least one of the pair of shaft support, at least one of the previous SL pair of extending portions, may be engageable with the end of the shaft projecting from the shaft support.

Claims (14)

A first support part, a second support part facing the first support part with a gap, and a connecting part for connecting one end of the first support part and one end of the second support part, and A frame formed so that a pipe introduced from between the other end of the first support part and the other end of the second support part can be disposed between the first support part and the second support part;
A pipe receiving member disposed between the first support portion and the second support portion and supported by the first support portion;
It is disposed between the first support portion and the second support portion, is supported by the second support portion, and is rotatably provided around an axis extending in the same direction as the center of the pipe received by the pipe receiving member. A roller blade,
A roller blade cover for a pipe cutter, including an operation portion projecting outward from the frame, and an operation mechanism portion that contacts or separates either the pipe receiving member or the roller blade with respect to the other,
A roller blade for a pipe cutter, comprising a blade edge cover portion covering a part of the blade edge of the roller blade exposed from between the other end of the first support portion and the other end of the second support portion. cover. A pair of extending portions extending from both ends of the blade edge cover portion;
The operating mechanism is
A pair of shaft support portions disposed on both sides of the roller blade in the axial direction;
A shaft that can be inserted into and removed from the roller blade and the pair of shaft support portions, and has at least one end projecting outward from at least one of the pair of shaft support portions, and serves as a rotation center of the roller blade With body,
The pair of extending portions are provided at an interval at which the pair of shaft support portions can be interposed,
The roller blade cover for a pipe cutter according to claim 1, wherein at least one of the pair of extending portions is engageable with an end portion of a shaft body protruding from the shaft support portion.   The roller blade cover for a pipe cutter according to claim 2, wherein the shaft body penetrates the roller blade and the pair of shaft support portions so as to be freely inserted and withdrawn, and both end portions protrude outward from the pair of shaft support portions.   4. The roller blade for a pipe cutter according to claim 2, wherein each of the pair of extending portions has a concave portion that is recessed toward an opposite side of the pipe receiving member at an end portion on the pipe receiving member side. cover.   The pair of extending portions are guide portions that are guided by the end portions of the shaft body, and are formed on mutually opposing surfaces of the pair of extending portions, and are opened on the outer edges of the pair of extending portions. The roller blade cover for a pipe cutter according to any one of claims 2 to 4, wherein the roller blade cover has a guided portion.   The pair of extending portions are fitting recesses formed on surfaces of the pair of extending portions facing each other, and have a fitting recess into which an end of the shaft body is fitted. A roller blade cover for a pipe cutter according to any one of the above.   A projecting piece extending from an end portion on the pipe receiving member side toward the other extending portion in at least one of the pair of extending portions, the pipe receiving member side of the shaft support portion The roller blade cover for a pipe cutter according to any one of claims 2 to 6, wherein the roller blade cover has a protruding piece along the end of the pipe cutter. A first support part, a second support part facing the first support part with a gap, and a connecting part for connecting one end of the first support part and one end of the second support part, and A frame formed so that a pipe introduced from between the other end of the first support part and the other end of the second support part can be disposed between the first support part and the second support part;
A pipe receiving member disposed between the first support portion and the second support portion and supported by the first support portion;
It is disposed between the first support portion and the second support portion, is supported by the second support portion, and is rotatably provided around an axis extending in the same direction as the center of the pipe received by the pipe receiving member. A roller blade,
An operating mechanism that protrudes outward from the frame; and an operating mechanism that contacts or separates either the pipe receiving member or the roller blade with respect to the other;
A pipe cutter comprising: a roller blade cover including a blade edge cover portion that covers a part of the blade edge of the roller blade exposed from between the other end of the first support portion and the other end of the second support portion. The roller blade cover further includes a pair of extending portions extending from both ends of the blade edge cover portion,
The operating mechanism is
A pair of shaft support portions disposed on both sides of the roller blade in the axial direction;
A shaft that can be inserted into and removed from the roller blade and the pair of shaft support portions, and has at least one end projecting outward from at least one of the pair of shaft support portions, and serves as a rotation center of the roller blade With body,
The pair of extending portions are provided at an interval at which the pair of shaft support portions can be interposed,
The pipe cutter according to claim 8, wherein at least one of the pair of extending portions is engageable with an end portion of a shaft body protruding from the shaft support portion.   The pipe cutter according to claim 9, wherein the shaft body penetrates the roller blade and the pair of shaft support portions so as to be insertable / removable, and both end portions protrude outward from the pair of shaft support portions. Each of a pair of said extension part is a pipe cutter of Claim 9 or 10 which has a recessed part dented toward the opposite side to this pipe receiving member in the edge part on the said pipe receiving member side. The pair of extending portions are guide portions that are guided by the end portions of the shaft body, and are formed on mutually opposing surfaces of the pair of extending portions, and are opened on the outer edges of the pair of extending portions. The pipe cutter as described in any one of Claims 9-11 which has the guide part which carried out.   The pair of extending portions are fitting recesses formed on surfaces of the pair of extending portions facing each other, and have a fitting recess into which an end portion of the shaft body is fitted. A pipe cutter according to any one of the above.   The roller blade cover is a projecting piece that extends from an end portion on the pipe receiving member side toward the other extension portion in at least one extension portion of the pair of extension portions, and the shaft The pipe cutter as described in any one of Claims 9-13 which has a protrusion along the edge part by the side of the pipe receiving member of a branch.

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