JP2011229280A - Cutting tool for resin flexible conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promptly and easily perform work for cutting a resin flexible conduit.SOLUTION: The present invention relates to a cutting tool for a resin flexible conduit 9 in which a peak portion 91 having a relatively large diameter and a valley portion 92 having a relatively small diameter are alternately formed in a length direction. The cutting tool includes: an annular main body 1 disposed to around the flexible conduit 9; a cutting blade 7 provided in the main body 1 so as to move forward and backward from an inner circumferential surface of the main body 1; positioning bolts 51-55 which are provided in the main body 1 and are positioned inside the valley portions 92 movably along the valley portion 92 for positioning the cutting blade 7 while facing the peak portions 91; and an operating handle 4 which is provided in the main body 1 for turning the main body 1 around the flexible conduit 9 in the state where an edge of the cutting blade 7 moves forward until abutting the peak portions 91.

Description

  TECHNICAL FIELD The present invention relates to a cutting tool for a flexible resin conduit, and in particular, a cutting capable of quickly cutting a so-called corrugated resin flexible conduit without damaging an electric wire passing through the inside. Related to tools.

  In recent years, the use of light and hard polyethylene resin, etc., has been widely used as a conduit, and in this type of conduit, a relatively large-diameter peak and a relatively small-diameter trough are in the longitudinal direction. Attention has been focused on corrugated resin flexible electric conduits which are alternately formed and have both flexibility and resistance to external pressure.

  Patent Document 1 discloses an erroneous cutting prevention scissor that detects an energized state of an electric wire and stops an operation of a shearing blade by a latch mechanism to prevent an erroneous cutting when the electric wire is in an energized state.

JP-A-6-261985

  By the way, when cutting the corrugated resin flexible conduit for the purpose of installing a hand hole for branching the wire, etc., it is necessary to pay the latest attention not to cut the internal wire, Conventionally, a saw blade is applied near the apex of the peak portion of the conduit, and the saw blade is moved in the circumferential direction while carefully watching the state to cut only the conduit. However, this method has a problem that workability is poor and skill is required to accurately apply the saw blade to the surface of the hard resin conduit that is slippery.

  SUMMARY OF THE INVENTION The present invention solves such problems, and an object of the present invention is to provide a cutting tool for a resin-made flexible conduit that can be quickly and easily cut.

  In order to achieve the above object, according to the first aspect of the present invention, a flexible resin conduit having a relatively large diameter peak (91) and a relatively small diameter valley (92) alternately formed in the longitudinal direction. A cutting tool according to (9), wherein an annular main body (1) is disposed so as to surround the flexible conduit (9), and the main body (1) is provided with the main body (1). A cutting blade (7) that can be advanced or retracted from the inner peripheral surface, and a main body (1) that is positioned in the valley (92) so as to be movable along the trough (92). Positioning members (51-55) positioned opposite to (91) and the main body (1) provided in the main body (1) and advanced until the cutting edge of the cutting blade (7) abuts the peak (91). And an operation member (4) for turning the flexible wire pipe (9) around the flexible electric wire tube (9).

  In the first aspect of the present invention, when the main body is swung around the flexible electric wire tube with the cutting edge advanced until it contacts the crest portion of the flexible electric wire tube, the flexible electric wire tube is moved to the crest portion by the cutting blade. Torn along. Since the crest is cut, the electric wire inserted into the conduit is not damaged. At this time, since the cutting blade is always positioned so as to face the mountain portion by the positioning member, the operator can easily grasp the operation member and rotate the main body around the flexible electric wire tube. Can be cut and cut in the longitudinal direction. In the case where the crests and troughs of the flexible conduit are formed in a spiral shape, the adjacent crests are torn and the strip-like portion remaining between them is cut transversely with a scissors. It can be easily separated in the longitudinal direction.

  In the second invention, the main body (1) is constituted by a pair of semi-annular halves (11, 12) each having one end coupled by a hinge member (2) and each other end being detachably connected to each other. The operating member (4) is provided in one half 11, and the cutting blade (7) is provided in the other half 12.

  According to the second aspect of the present invention, the main body in a state where the other end of each half is separated and opened is put on the outer periphery of the flexible conduit, and then the other end is connected again to connect the main body to the outer periphery of the flexible conduit. It can be easily installed.

  The reference numerals in the parentheses indicate the correspondence with specific means described in the embodiments described later.

  As described above, according to the cutting tool of the present invention, it is possible to quickly and easily perform the cutting operation on the resin-made flexible electric conduit.

It is a side view of the cutting tool of a closed state which shows one embodiment of the present invention. It is a side view of the cutting tool made into the open state. It is a front view of the cutting tool made into the open state. It is a front view of the cutting tool made into the open state in the process of mounting | wearing with a flexible electric wire tube. It is a side view of the flexible electric wire tube of the state where it was torn with the cutting tool.

 FIG. 1 shows an overall side view of the cutting tool. The cutting tool includes an annular main body 1, and the main body 1 includes a pair of semi-annular halves 11 and 12. Both halves 11 and 12 can be opened so that one end is coupled by the hinge member 2 and the other ends are separated from each other. The other ends of the halves 11 and 12 are connected to each other by the patch lock 3, and by releasing the connection of the patch lock 3, both halves 11 and 12 can be opened as shown in FIG. 2.

  In FIG. 2, a rod-like operation handle 4 as an operation member protrudes from the outer peripheral surface of the top portion 111 of the halves 11 and 12. The operation handle 4 can be laid down by a known structure as shown by a chain line in FIG. In addition, a positioning bolt 51 as a positioning member, which will be described in detail later, is installed in the top portion 111 of the half portion 11 so as to penetrate into the arc adjacent to the operation handle 4.

  On the other hand, the top part 121 of the half part 12 is provided with a box-shaped guide member 13 that opens into the arc through an opening 122 (FIG. 3) formed in the half part 12. A rectangular block-shaped holding body 6 is accommodated. Positioning bolts project from both ends of the inner end surface 61 of the holding body 6, and arc-shaped cutting blades 7 project from an intermediate position of the inner end surface 61. In addition, positioning bolts 54 and 55 are provided at both inner peripheral ends of the half portion 12 so as to project into the arc.

  The holding body 6 is formed with a screw hole 61 penetrating through the center, and a tip screw portion 81 of the rotary handle 8 penetrating the top surface of the guide member 13 is screwed into the screw hole 61. When the rotary handle 8 is rotated forward and backward, the holding body 6 linearly moves inward and outward of the arc of the half portion 12 accordingly. Thereby, the advancement amount of the cutting blade 7 from the inner peripheral surface of the half part 12 can be adjusted.

  The resin flexible electric conduit 9 cut by the cutting tool having the above structure is as shown in FIG. 4, and the relatively large-diameter peak portions 91 and the relatively small-diameter valley portions 92 are alternately arranged in this embodiment. In the form, it is continuously formed in the longitudinal direction spirally.

  In the case of cutting the flexible conduit 9, the holding bodies 6 are set so that the halves 11 and 12 are opened and the rotary handle 8 is reversed so that the cutting blade 7 does not come out of the inner peripheral surface of the halves 12. Retreat. In this state, the positioning bolts 54 and 55 of the half portion 12 are positioned in the valley portion 92 of the flexible conduit 9. Subsequently, the half 11 is closed so as to cover the flexible conduit 9, and the positioning bolt 51 of the half 11 is positioned in the trough 92 of the flexible conduit 9. And the half parts 11 and 12 are connected by the patchon tablet 3, and the cyclic | annular main body 1 surrounding the circumference | surroundings of the flexible electric wire tube 9 is formed. In this state, the main body 1 is restricted from moving in the longitudinal direction of the flexible conduit 9 by the positioning bolts 51, 54, and 55 that have entered the valley portion 92.

  After that, when the rotary handle 8 is rotated forward to move the holding body 6 forward and the cutting blade 7 is advanced from the inner peripheral surface of the half portion 12 by an appropriate amount, the cutting edge reaches the peak portion 91 of the flexible conduit 9. Abut. At the same time, the positioning bolts 53 and 54 provided on the holding body 6 enter the valley 92 adjacent to the peak 91 so that the cutting edge of the cutting blade 7 is almost at the center of the peak 91 of the flexible conduit 9. Make contact exactly. In this state, when the operation handle 8 is grasped and the main body 1 is rotated 1.5 to 2 times, the flexible conduit 9 is in a desired rotation angle range along the spiral peak 91 as shown in FIG. It is separated by. Then, the half parts 11 and 12 of the main body 1 are opened and removed from the flexible conduit 9, and the adjacent peak portions 91 are torn and the strip-like portion 93 of the flexible conduit 9 remaining between them is scissors-crossed. If it cut | disconnects in this, the flexible electric wire tube 9 will be completely divided into 2 in a longitudinal direction.

  As described above, according to the cutting tool of the present embodiment, the flexible conduit 9 can damage the wire inserted into the conduit 9 at the peak portion 91 only by rotating the annular main body 1. Can be easily cut in a spiral shape, and then the flexible conduit 9 can be quickly cut in the longitudinal direction using a scissors. Of course, the cutting tool of the present invention can also be used for flexible conduits in which the crests and troughs are not formed in a spiral but are alternately formed in parallel. In this case, the annular body is rotated once. The conduit can be easily cut off in the longitudinal direction.

DESCRIPTION OF SYMBOLS 1 ... Main body, 11, 12 ... Half part, 2 ... Hinge member, 3 ... Patchon lock, 4 ... Operation handle (operation member), 51, 52, 53, 54, 55 ... Positioning bolt (positioning member), 6 ... Holding Body: 7 ... Cutting blade, 8 ... Rotating handle, 9 ... Flexible conduit, 91 ... Mountain part, 92 ... Valley part.

Claims (2)

A cutting tool for a flexible resin conduit having a relatively large diameter crest and a relatively small diameter trough alternately formed in the longitudinal direction, and is arranged to surround the flexible conduit. An annular main body provided, a cutting blade provided in the main body and capable of advancing or retreating from an inner peripheral surface of the main body, provided in the main body, and positioned so as to be movable along the valley. And a positioning member for positioning the cutting blade so as to face the crest, and the main body around the flexible wire tube in a state of being advanced until the cutting edge of the cutting blade comes into contact with the crest. A cutting tool for a resin-made flexible electric conduit having an operation member that is pivoted. The main body is composed of a pair of semi-annular halves in which one end is coupled by a hinge member and the other end is detachably connected to each other, the operation member is provided in one half, and the other half The cutting tool of the resin-made flexible electric wire tube of Claim 1 which provided the said cutting blade in.

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