JP2012235660A - Protective sheath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective sheath which allows a cord, rope or tube that may be damaged by external force to be surely protected from the external force, and also allows the cord, rope or tube that is a protection target to relatively slide as needed.SOLUTION: A protective sheath 10 attached via an opening of a split portion 11 to the outer periphery of a power cord C as a protection target is disposed at a region where the power cord C is pinched in a door D, and is subjected to shear force. The protective sheath 10 stays at a position at which the power cord C is pinched in the door D because of anti-smoothness of a body of the protective sheath 10 made of an anti-smooth synthetic rubber, and protects the power cord C pinched in the door D from shear force by elasticity of the body. At that time, a guide body made of easily slidable polyethylene terephthalate (PET) disposed on the inner peripheral side of the body allows the power cord C to be relatively slidable.

Description

  The present invention relates to a protective sheath that is attached to a cord, rope, or tube that may be damaged by an external force so as to protect the cord, rope, or tube from the external force.

  In general, power cords of electrical equipment are covered with a core wire with a relatively soft insulating material. Therefore, if an external force such as a large shearing force or bending force is repeatedly applied, the core wire may be damaged and the core wire may be disconnected. Therefore, conventionally, a protective sheath has been proposed in which an electrical cord is protected from external force to prevent damage (see, for example, Patent Document 1).

  Here, Patent Literature 1 describes a cord bushing (protective sheath) for preventing a power cord led out from a main body of an electric product from being disconnected due to bending fatigue at the lead-out portion. The cord bushing (protective sheath) includes an inner bushing and an outer bushing made of a synthetic resin having elasticity, and is attached to a main body of an electric product.

  Patent Document 2 describes a protective sheath that can be inserted without damaging a medical insertion tool such as an endoscope or a treatment tool. The protective sheath is composed of a hard part on the hand side and a flexible soft part connected to the distal end side of the hard part.

JP 2010-9876 A JP-A-5-123287

  Incidentally, the protective sheath (cord bushing) described in Patent Document 1 prevents the power cord led out from the main body of the electrical product from being disconnected due to bending fatigue at the lead-out portion, and the power cord to be protected Cannot be slid relative to each other as necessary.

  On the other hand, the protective sheath described in Patent Document 2 can be inserted without damaging the medical insertion tool, and is used by being inserted in advance into the insertion assisting tool of the medical insertion tool. For this reason, it cannot be used to protect a power cord of an electrical product from external force.

  The present invention has been made in response to such problems of the prior art, and can reliably protect cords, ropes, or tubes that may be damaged by external force, such as power cords of electrical products, from external force. It is an object of the present invention to provide a protective sheath that can be slid relative to a cord, rope, or tube to be protected as required.

  In order to solve such a problem, the protective sheath according to the present invention is a cylindrical protective sheath having a slit portion to be attached to the outer periphery of a cord, rope or tube to be protected, and has a non-slip property. And a guide body made of a slippery synthetic resin disposed on the inner peripheral side of the body.

  The protective sheath according to the present invention is attached to the outer periphery of the cord, rope, or tube through the opening of the cut portion in order to protect the cord, rope, or tube that may be damaged by the external force from the external force. The protective sheath is placed at a site where the cord, rope or tube receives external force.

  In such a state of wearing the protective sheath, the main body made of the non-slippery elastomer stays at a position where it receives an external force due to the non-slippery and protects the cord, rope or tube from the external force by the elasticity of the main body. In that case, the guide body which consists of a slippery synthetic resin arrange | positioned at the inner peripheral side of a main body makes a code | cord | chord, a rope, or a tube relatively slidable.

  In the protective sheath of the present invention, the guide body that allows the cord, the rope, or the tube to slide relative to each other only needs to be disposed at least at both ends of the main body or only at the intermediate portion. And may be arranged over the entire length of the main body.

  Here, when the guide body has a bellows-like cross-sectional shape, the contact resistance with respect to the cord, rope, or tube is reduced, so that the cord, rope, or tube can slide more smoothly with respect to the guide body.

  In the protective sheath according to the present invention, the main body made of the non-slippery elastomer stays at a position where external force is received by the non-slippery property, and the cord, rope or tube is protected from the external force by the elasticity of the main body. In that case, the guide body which consists of a slippery synthetic resin arrange | positioned at the inner peripheral side of a main body makes a code | cord | chord, a rope, or a tube relatively slidable.

  Therefore, according to the protective sheath according to the present invention, the cord, rope, or tube to be protected can be reliably protected from external force, and the cord, rope, or tube to be protected can be relatively relative as necessary. Can be slid.

It is a perspective view which shows the external appearance of the protective sheath which concerns on one Embodiment of this invention. It is a cross-sectional view orthogonal to the axial direction of the protective sheath shown in FIG. It is a longitudinal cross-sectional view along the axial direction of the protective sheath shown in FIG. It is a plane sectional view showing an example of use in the state where the protective sheath shown in Drawing 1 was pinched by the door. It is a perspective view corresponding to FIG. 1 which shows the 1st modification of the protective sheath shown in FIG. It is a longitudinal cross-sectional view corresponding to FIG. 3 which shows the 2nd modification of the protective sheath shown in FIG. It is a longitudinal cross-sectional view corresponding to FIG. 3 which shows the 3rd modification of the protective sheath shown in FIG. It is a longitudinal cross-sectional view corresponding to FIG. 3 which shows the 4th modification of the protective sheath shown in FIG. It is a longitudinal cross-sectional view corresponding to FIG. 3 which shows the 5th modification of the protective sheath shown in FIG. It is a front view which shows the other modification which comprised the protection sheath shown in FIG. 1 so that multiple connection was possible. It is a front view corresponding to FIG. 10 which shows the modification of the some protective sheath shown in FIG.

  Hereinafter, embodiments of a protective sheath according to the present invention will be described with reference to the accompanying drawings. The protective sheath of one embodiment is configured to protect power cords such as a business vacuum cleaner, a polisher, and a movable blower used in an office building or a public facility, for example.

  As shown in FIG. 1, the protective sheath 10 of one embodiment is formed in a cylindrical shape that is attached to the outer periphery of the power cord C to be protected, and is attached to the outer periphery of the power cord C on the peripheral surface thereof. The cutting part 11 for doing is opening.

  The cut portion 11 extends linearly along the axial direction of the protective sheath 10, and the cross-sectional shape of the opposing edge across the opening of the cut portion 11 allows the power cord C to pass smoothly. The semicircular shape as shown in FIG.

  As shown in FIG. 3, a pair of guide portions 12, 12 that guide the outer periphery of the power cord C by bulging toward the inner peripheral side are formed at both ends of the cylindrical protective sheath 10. The guide portions 12 and 12 bulge toward the inner peripheral side with a semicircular cross-sectional shape so that the power cord C can slide smoothly.

  Here, as shown in FIGS. 2 and 3, the protective sheath 10 is integrally formed by arranging a guide body 14 formed in a thin cylindrical shape on the inner peripheral side of the main body 13 formed in a thick cylindrical shape. The structure is overlapped.

  The thick main body 13 is made of an elastomer, such as a synthetic rubber or an ABS-based elastic resin, which has a non-slip property that prevents the surface from slipping and has an appropriate elasticity. On the other hand, the thin guide body 14 is made of a synthetic resin having slipperiness such that the surface is slippery, such as polyethylene terephthalate (PET) or a fluororesin.

  As shown in FIG. 4, the protective sheath 10 of one embodiment configured as described above has a power supply through the opening of the cut portion 11 so as to protect the power cord C of a vacuum cleaner or the like (not shown) from an external force. Attached to the outer periphery of the cord C. At that time, since the cross-sectional shape of the opposite edge portion across the opening of the cut portion 11 is a semicircular shape as shown in FIG. 2, the power cord C can smoothly pass through the opening of the cut portion 11, The protective sheath 10 is easily attached to the outer periphery of the power cord C.

  The protective sheath 10 attached to the outer periphery of the power cord C is placed at a site where the power cord C routed through the opening of the door D, such as in an office building, is sandwiched by the door D and receives a large shearing force. It is burned. That is, the protective sheath 10 is sandwiched between the peripheral portion of the door D and the door frame J in a state where the power cord C is inserted.

  The protective sheath 10 sandwiched between the peripheral edge of the door D and the door frame J has a thick main body 13 made of synthetic rubber or ABS-based elastic resin having appropriate elasticity, and its surface is difficult to slip. Since it has lubricity, it stays at the position sandwiched by the door D without damaging the peripheral edge of the door D and the door frame J. The protective sheath 10 protects the power cord C from a shearing force sandwiched between the doors D by appropriate rigidity due to the thick main body 13 and the thin guide body 14.

  Here, the cylindrical guide body 14 constituting the inner peripheral side of the protective sheath 10 is made of polyethylene terephthalate (PET) or fluororesin having a slippery surface that is slippery, and both ends of the guide body 14 are half-finished. Since the circular cross-sectional shape bulges toward the inner peripheral side, the power cord C can smoothly slide relative to the guide body 14. As a result, even when the power cord C is pulled according to the movement of a cleaner or the like (not shown), the power cord C can smoothly slide in the protective sheath 10.

  Therefore, according to the protective sheath 10 of the embodiment, the power cord C to be protected can be reliably protected from the shearing force sandwiched between the doors D, and the power cord C to be protected can be protected as necessary. Can be slid relative to each other.

  The protective sheath according to the present invention is not limited to the above-described embodiment. For example, the slit portion 11 of the protective sheath 10 shown in FIG. 1 is gently curved in the circumferential direction at the intermediate portion in the axial direction of the protective sheath 20 like the slit portion 21 of the protective sheath 20 shown in FIG. It is good also as a form. In this case, since the cut portion 21 is curved, the power cord C inserted into the protective sheath 20 is not accidentally pulled out from the cut portion 21.

  Further, the guide body 14 of the protective sheath 10 shown in FIG. 3 has a cylindrical shape having a bellows-like cross-sectional shape, for example, a wavy cross-sectional shape is axial in the direction of the guide body 34 of the protective sheath 30 shown in FIG. Corresponding to this, the main body 33 of the protective sheath 30 can be changed to a cross-sectional shape that matches the cross-sectional shape of the guide body 34.

  In this case, the power cord C inserted into the protective sheath 30 shown in FIG. 6 makes point contact with the protrusions on the inner surface of the corrugated cross section that is continuous in the axial direction of the guide body 34, so It will be able to slide more smoothly.

  Further, the cylindrical guide body 14 of the protective sheath 10 shown in FIG. 3 is arranged at both ends of the cylindrical main body 43 and is arranged on the inner periphery like the guide bodies 44 44 of the protective sheath 40 shown in FIG. It can be changed to a ring shape that bulges to the side with a semicircular cross-sectional shape.

  Further, the cylindrical guide body 14 of the protective sheath 10 shown in FIG. 3 is formed into a thick cylindrical wig made of slippery nylon fiber or the like like the guide body 54 of the protective sheath 50 shown in FIG. Can be changed. The guide body 54 is prevented from coming off by small-diameter throttle portions 54 and 54 formed at both ends of the cylindrical main body 53.

  Furthermore, the cylindrical guide body 14 of the protective sheath 10 shown in FIG. 3 can be changed to a guide body 64 attached to the inner periphery of the cylindrical main body 63 of the protective sheath 60 shown in FIG. The guide body 64 has a small-diameter cylindrical guide portion 64A and a plurality of fins 64B projecting radially from the outer periphery of the guide portion 64A toward the inner surface of the main body 63.

  Here, the protective sheath 10 of one embodiment is intended to protect a power cord such as a business vacuum cleaner used in an office building or a public facility, but the protective sheath of the present invention is damaged by an external force. It can be configured to protect a rope or tube having a fear from external force.

  FIG. 10 shows a configuration in which a plurality of the protective sheaths 10 described above can be connected to each other. As a structure for this, a male connecting hand A is integrally formed at one end of the main body 13 of the protective sheath 10. A female connecting hand B is integrally formed at the other end. The male connection hand A is formed into an arrowhead shape, for example, and the female connection hand B is formed into a ring shape such as an ellipse that can lock the arrow-shaped male connection hand A.

  The protective sheath 10 having the male coupling hand A and the female coupling hand B shown in FIG. 10 protects a rescue rope (not shown) pulled through, for example, rubble over a predetermined length. It is attached to the outer periphery of a rescue rope (not shown) in a state of being connected to each other.

  Note that the arrow-shaped male coupling hand A and the ring-shaped female coupling hand B shown in FIG. 10 are a male coupling hand A composed of a spherical protrusion and a female coupling composed of a spherical recess as shown in FIG. It can be changed to hand B. The male connection hand A and the female connection hand B may be provided at one place in the circumferential direction of the main body 13 of the protective sheath 10, or a pair may be provided at opposite positions in the circumferential direction.

  The protective sheaths 20, 30, 40 and 50 described above can also be connected to each other by attaching a male connecting hand A and a female connecting hand B as shown in FIG. By attaching to the outer periphery of a rescue rope (not shown) in a state, a rescue rope (not shown) pulled through between rubble and the like can be protected over a predetermined length.

  In addition, the protective sheath of the present invention can be configured as a small protective sheath that protects an infusion tube or the like used in a hospital or clinic. In this case, by holding a small protective sheath attached to an infusion tube or the like, for example, on the toilet door, it is possible to prevent the infusion from stopping due to the infusion tube or the like being sandwiched by the toilet door.

10: Protective sheath 11: Cutting portion 12: Guide portion 13: Main body 14: Guide body

Claims (1)

A cylindrical protective sheath having a slit for attaching to the outer periphery of a cord, rope or tube to be protected,
A protective sheath comprising: a main body made of a non-slippery elastomer; and a guide body made of a slippery synthetic resin disposed on the inner peripheral side of the main body.