JP2017208950A - Cable terminal traction structure and assembly method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable terminal traction structure and an assembly method of the cable terminal traction structure for reducing workload at a connection site.SOLUTION: A cable terminal traction structure comprises: at least one cable terminal 2a in which a terminal 24 are fitted to a conductor exposed part 23 so as to be ready to be wired; a protection cover 41 for protecting and housing the cable terminal 2a; a fixing member 42 separatably connected to the protection cover 41, for fixing each cable terminal 2a inside the protection cover 41; and a pulling eye 4 having an eye metal fitting 46 fixed on the protection cover 41. Each cable terminal 2a includes a tubular engagement member 25 with an enlarging diameter part 25a which is included in an insulation coating 21 in the conductor exposed part 23 side and increases a diameter thereof toward the conductor exposed part 23 side. A fixing member 42 includes a holding part 42a capable of contacting and holding an outer peripheral surface of the enlarging diameter part 25a of each cable terminal 2a. Consequently, the enlarging diameter part 25a is held by the holding part 42a so as to prevent each cable terminal 2a from being pulled out.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable terminal traction structure in which a pooling eye is attached to, for example, at least one cable tip including a conductor exposed portion, and an assembling method thereof.

Conventionally, a pooling eye for drawing an electric cable into a laying pipeline and extending it to a predetermined place is known.
For example, in Patent Document 1, a cable conductor is gripped by a sleeve having a threaded bolt protruding from the tip of a conductor gripping socket, and the same number of insertion holes are drilled on the same circumference and at the center. Inserting the wire rope into the insertion hole of the support plate projecting the eye part, forming a waterproof tape layer from the cable cover to the sleeve, and covering the outer periphery with a metal protective cover A cable pooling eye is described which is fixed to the support plate.

Japanese Utility Model Publication No.59-133502

  The pooling eye makes it easy to pull the cable into a laying pipeline or the like, and pulls the cable to a place where a target device to be connected is installed. However, the sleeve of the pooling eye that grips the cable conductor is connected to the cable conductor by compression, and the cable is pulled to attach the terminal for connection (wiring) to the connection partner (for example, switchboard) to the cable conductor. After that, the sleeve that has been compression-connected must be removed from the cable, and the removal of this sleeve cuts the cable covering portion that is located on the cable body side of the cable tip portion where the metal protective cover of the pooling eye is fitted. It was done by. In addition, after cutting the cable, it is necessary to strip the cable coating again to expose the conductor, attach a terminal to the exposed conductor, and perform terminal treatment such as insulation and waterproofing. It was.

  In recent years, where the capacity of trunk lines (cables) has increased and the number of systems has increased as the number of buildings such as condominiums and buildings has risen, it has been desired to save space in distribution rooms. It may be difficult to secure space. Performing cable terminal processing in a narrow work space deteriorates the work environment, and in some cases, it may be assumed that the cable terminal processing cannot be performed sufficiently. For this reason, even in such a case, it is necessary to develop a cable pulling structure that can easily perform the wiring work to the work connection partner.

  Therefore, the present invention has been made in view of the above-described problems, and at least one cable can be pulled in a terminal-treated state where wiring work is easy with respect to a connection partner, at a connection place. It is an object of the present invention to provide a cable terminal pulling structure and an assembling method thereof that can remarkably improve the wiring workability.

  In order to achieve the above object, the gist of the present invention is as follows.

(1) At least one cable terminal having a terminal mounted on the conductor exposed portion and finished in a routable state, and an internal space for housing the at least one cable terminal in a routable state. A protective cover, a fixing member that is detachably connected to the protective cover, and has a structure that can be disassembled to position and fix the cable ends in the protective cover, and an eye bracket that is connected and fixed to the outer surface of the protective cover Each of the cable ends is in close contact with the insulation coating on the conductor exposed portion side having a diameter-enlarged portion of an outer peripheral surface that expands toward the conductor exposed portion side. The fixing member has a housing portion having an inner peripheral surface in a shape capable of being held in contact with the outer peripheral surface of the enlarged diameter portion of each cable end, and the enlarged diameter portion is in front. Cable terminal traction structure is held by the housing part, characterized in that to prevent pull-out of the respective cable terminal for the pulling eye.

(2) The inner peripheral surface of the housing portion has a shape that decreases in diameter toward the proximal end side of each cable terminal, and the minimum inner diameter of the housing portion is larger than the maximum outer diameter of the expanded portion. The cable terminal traction structure according to (1), wherein the cable terminal traction structure has a small size.

(3) The above-mentioned (1) or characterized in that the tubular engaging member is configured to insulate and cover at least a portion of each of the cable terminals that spans the base end portion of the terminal and the insulating coating. The cable terminal traction structure according to (2).

(4) The cable terminal pulling structure according to (1) or (2), wherein the tubular engaging member is constituted by a plurality of divided members.

(5) The cable terminal traction structure according to (4), wherein each cable terminal has an insulating member that covers at least the conductor exposed part that is not covered by the base end part of the terminal.

(6) The at least one cable terminal is a plurality of cable terminals, and each of the terminals of the plurality of cable terminals can be separated by a facing arrangement relationship in which a connection surface to be wired is inward. The cable terminal traction structure according to any one of (1) to (5), further including an interposing member to be fixed.

(7) The fixing member is provided inside the pooling eye, and has a concave portion that accommodates the enlarged diameter portion of each cable terminal, and the concave portion of the stationary plate in which the enlarged diameter portion is accommodated. A pressing member that is moved close to the opening and forms the housing portion together with the fixing plate to sandwich the diameter-enlarged portion. Any one of (1) to (6) above The cable terminal pull structure according to claim 1.

(8) A method for assembling a cable terminal traction structure in which a pooling eye is attached to a cable tip including at least one conductor exposed portion, and a terminal is attached to the conductor exposed portion to finish wiring, and thereafter A step of forming a cable end by tightly fixing a tubular engagement member having an outer peripheral surface-shaped expanded diameter portion that expands toward the conductor exposed portion side to the conductor exposed portion side insulation coating; and A protective cover having an internal space for accommodating at least one cable terminal in a state in which each cable terminal can be wired, and connected to the protective cover so as to be separable, and the cable terminals are positioned and fixed in the protective cover. A fixing member having a disassembling structure having an accommodating portion for preventing the cable terminals from being pulled out, and an eye bracket connected and fixed to the outer surface of the protective cover. That the fixing member of the pulling eye, the assembly method of the cable terminal pulling structure; and a step of forming a cable terminal towing structure to accommodate holding the enlarged diameter portion of the cable terminal.

(9) The tubular engagement member is a flexible member, the diameter of the tubular engagement member is expanded in advance, and then the tubular engagement member is covered from the terminal side to a predetermined position, and then the cable terminal. The method for assembling the cable structure according to (8), wherein in the step of forming, the tubular engagement member in an expanded state is tightly fixed to the insulating coating by self-shrinking.

  According to the present invention, at least one cable terminal having a terminal mounted on the conductor exposed portion and finished in a routable state, and the at least one cable terminal that accommodates each cable terminal in a routable state A protective cover having a space, a fixing member that is separably connected to the protective cover, and has a structure that can be disassembled to position and fix the cable ends in the protective cover, and is connected and fixed to the outer surface of the protective cover. A tubular engagement with each of the cable ends having an outer peripheral surface-shaped enlarged diameter portion that expands toward the conductor exposed portion side on the conductor exposed portion side of the insulation coating on the conductor exposed portion side. The member has a tightly fixed state, and the fixing member has an accommodating portion having an inner peripheral surface of a shape that can be held in contact with the outer peripheral surface of the enlarged diameter portion of each cable terminal, A diameter portion is held in the housing portion to prevent the cable ends from being pulled out of the pooling eye, so that at least one cable is terminated at each cable end and the connection surface of the terminal can be wired. The cable can be pulled and extended to a predetermined connection place without causing damage or deformation, and as a result, the wiring workability at the connection place can be remarkably improved.

FIG. 1 is a perspective view showing an exemplary embodiment of a cable terminal traction structure according to the present invention, with a part thereof exploded to illustrate its internal structure. FIG. 2 is a partial cross-sectional view showing a part of the protective cover constituting the pooling eye in order to explain the internal state of the cable terminal pulling structure shown in FIG. 3 (a) and 3 (b) show only one of the cable terminals constituting the cable terminal traction structure shown in FIG. 1, and FIG. 3 (a) is a perspective view and FIG. b) is a partial sectional view. FIG. 4 is an exploded perspective view of a fixing member constituting the pooling eye. FIGS. 5A and 5B are cross-sectional views showing the configuration of the main part of the fixing member. FIG. 5A is a state before the fixing member is assembled, and FIG. 5B is an assembly of the fixing member. Shown later. 6A and 6B are views showing a state in which the cable terminal is held by the fixing member, and FIG. 6A is a state in which the cable is held at the normal position of the fixing member. (B) shows a state in which the cable is pulled and moved from the normal position of the fixing member in the pulling direction. FIGS. 7A and 7B show another embodiment (modified example 1) of the cable terminal, in which FIG. 7A is a perspective view and FIG. 7B is a partial cross-sectional view. is there. FIG. 8 shows another embodiment (Modification 2) of the cable terminal, in which FIG. 8 (a) is a perspective view and FIG. 8 (b) is a partial sectional view. 9A and 9B show another embodiment (Modification 3) of the cable terminal, in which FIG. 9A is a perspective view and FIG. 9B is a partial cross-sectional view.

  Next, a cable terminal traction structure according to an embodiment of the present invention will be described below with reference to the drawings. In addition, embodiment shown below is an illustration for demonstrating the cable terminal traction structure of this invention concretely, A various form can be taken in the scope of this invention.

  FIG. 1 is a partially exploded view of the cable terminal traction structure for explaining the internal structure, and is viewed from obliquely above. FIG. 2 illustrates the internal state of the cable terminal traction structure shown in FIG. FIG. 3 is a partial cross-sectional view showing a part of the protective cover constituting the pooling eye, and FIGS. 3A and 3B are views of the cable terminal constituting the cable terminal traction structure shown in FIG. FIG. 3A is a perspective view, FIG. 3B is a partial cross-sectional view, and FIG. 4 is an exploded perspective view of a fixing member that constitutes a pooling eye. FIGS. 5A and 5B are cross-sectional views showing the configuration of the main part of the fixing member. FIG. 5A is a state before the fixing member is assembled, and FIG. The state after the assembly of a member is shown.

<Cable terminal pulling structure>
As shown in FIGS. 1 and 2, the cable terminal pulling structure 1 includes at least one cable terminal 2 a that is subjected to terminal processing on the distal end side of the cable 2, and a pooling eye 4 that pulls each cable terminal 2 a. It is a provided structure. For example, in the illustrated embodiment, a cable terminal group 3 including three cable terminals 2a is provided.

The cable terminal 2 a is a part obtained by performing terminal processing on the tip of the cable 2. Here, “terminal treatment” means that the end portion of the cable 2 is exposed by peeling off the insulating coating 21 constituting the cable 2 to form a conductor exposed portion 23, and a terminal 24 is attached to the conductor exposed portion 23. Furthermore, it means a series of processes until insulation and waterproofing are performed. That is, in the embodiment shown in FIG. 3, the cable terminal 2 a has a terminal 24 attached to the conductor exposed portion 23 of the cable 2 and an insulating and waterproof tubular engagement member 25, and a cable tip portion. It is the structure part comprised in (1).
The cable 2 is fixed to the pooling eye 4 at a cable terminal 2a that is finished in a state where it can be wired to a connection partner. Since the cable terminal 2a is formed in advance before towing in a clean environment in which a work space is sufficiently secured and dust and the like do not exist as much as possible, a high-quality cable terminal 2a can be provided. As a result, the conductor 22 is not exposed at the connection location, and oxidation can be prevented particularly when the conductor 22 of the cable 2 is made of aluminum.
The cable 2 includes a conductor 22 of the cable 2, an insulating coating (cable insulator) 21 that covers the outer periphery of the conductor 22, and a protective layer (cable sheath) that protects the conductor 22 and the insulating coating 21. ing. In the drawing, the insulating coating 21 and the protective layer are drawn together.

(Insulation coating)
The insulation coating 21 may be of any material as long as it is a substance that insulates the conductor 22 from the outside. The insulating coating 21 is made of, for example, an insulating resin including polyvinyl chloride (PVC) and cross-linked polyethylene.

(conductor)
The conductor 22 is made of a metal material such as aluminum, an aluminum alloy, copper, or a copper alloy. Although the form of the conductor 22 has shown the case where it comprises with the strand wire formed by twisting several strands in FIG.3 (b), it may be a single wire without being restricted to a strand wire. For example, the aluminum conductor 22 is preferable in terms of reducing the weight of the cable 2.
The conductor exposed portion 23 is a portion where the insulation coating 21 is peeled off from the tip end portion of the cable 2 to expose the conductor, and a terminal 24 for connecting to a connection partner (for example, a switchboard) is attached.

(Terminal)
The terminal 24 is a portion connected to a connection partner, and is made of a metal material such as aluminum, aluminum alloy, copper, or copper alloy, and FIG. 1 shows a case where it is a plate-like terminal. One main surface of the two main surfaces of the terminal 24 forms an energizing contact surface that is connected in contact with the connection partner.
On the distal end side of the terminal 24, a plate-like portion 24a connected to the connection partner is provided. The plate-like portion 24a has two insertion holes 24b for fixing with a connection partner through which a fixing tool such as a bolt is inserted. The number of insertion holes 24b can be set freely.
The terminal 24 constituting the cable terminal 2 a is provided with a cylindrical portion 24 c into which the distal end of the conductor exposed portion 23 of the conductor 22 is inserted. The terminal 24 is connected (coupled) to the conductor exposed portion 23 with the tubular portion 24 c in a state where the tip of the conductor exposed portion 23 is inserted. The connection method includes crimping and compression, caulking, soldering, and the like, but any method is acceptable as long as it is electrically and mechanically satisfactory.

(Tubular engagement member)
The tubular engaging member 25 is a member that is provided in a tightly fixed state on the insulating coating 21 of the cable 2 and is held by a fixing member 42 described later. As shown in FIG. 3, the tubular engagement member 25 is configured to insulate at least a portion of the cable 2 that straddles the base end side of the terminal 24 and the insulating coating 21. The tubular engaging member 25 is an integrally formed member formed integrally with the cable 2 and is formed by, for example, a known molding method.
The material of the tubular engagement member 25 is not particularly limited as long as it is excellent in insulation and waterproofness, but a rubber material such as silicone rubber and EP rubber, or a synthetic resin material such as plastic is used.

  The tubular engaging member 25 has an outer peripheral surface-shaped enlarged diameter portion 25a that increases in diameter toward the conductor exposed portion 23 side on the outer periphery of the insulating coating 21 on the conductor exposed portion 23 side. Specifically, the diameter-enlarged portion 25 a is a portion having a substantially truncated cone shape whose diameter is increased toward the distal end side of the cable 2. The enlarged diameter portion 25 a is provided on the cable body side portion of the tubular engagement member 25. Due to the presence of the enlarged diameter portion 25 a, the outer diameter of the tubular engagement member 25 increases toward the radially outer side of the cable 2.

  In addition, the tubular engagement member 25 has an insulating property and a waterproof property, and at least covers the portion of the cable 2 that straddles the base end portion of the terminal 24 and the insulating coating 21, so that an insulating / waterproof function is also achieved. There is no need to prepare a separate insulating member, and the number of parts in the cable terminal 2a can be reduced.

[Pooling Eye]
The pooling eye 4 is a cable pulling jig used when pulling and extending one or a plurality of cables 2 to a position where a connection partner is installed. For example, in the embodiment shown in FIG. 1, the pooling eye 4 is configured so that a plurality of cable terminals 2 a can be pulled together as a cable terminal group 3. The pooling eye 4 includes a protective cover 41, a fixing member 42, and an eye fitting 46.

(Protective cover)
The protective cover 41 has an internal space in which the cable terminal group 3 is accommodated in a state in which each cable terminal 2a can be wired, and is formed in a bottomed cylindrical shape in FIG. The protective cover 41 is fitted on the distal end (cable terminal 2 a) side of the cable 2 and completely covers at least the enlarged diameter portion 25 a of the tubular engagement member 25. Although the material of the protective cover 41 is not specifically limited, For example, a metal is preferable.
The protective cover 41 has an insertion hole 41b for connecting a fixing member 42, which will be described later, for example, through which a connector 41a having a thread at the tip is inserted. The number of the insertion holes 41b can be freely set, but it is preferable that there are a plurality of insertion holes 41b. For example, three insertion holes 41b are provided at equal intervals (120 °) on the peripheral surface of the protective cover 41. It is preferable to connect to the fixing member 42.

(Fixing member)
The fixing member 42 is detachably connected to the protective cover 41, and positions and fixes each cable terminal 2a in the protective cover 41. The fixing member 42 has a circular shape in plan view, and the material thereof is not particularly limited. For example, a metal is preferable. As shown in FIG. 5 (b), the fixing member 42 has an accommodating portion 42a having an inner peripheral surface that can be held in contact with the outer peripheral surface of the enlarged diameter portion 25a of the cable terminal 2a. The expanded diameter portion 25a is held by the accommodating portion 42a to prevent the cable terminals 2a from being pulled out of the pooling eye 4.

  The fixing member 42 has a structure that can be disassembled. Specifically, as shown in FIG. 4, the fixing member 42 is provided inside the pooling eye 4, and includes a fixing plate 43 that accommodates the enlarged diameter portion 25 a of the cable terminal 2 a, and a diameter expansion accommodated in the fixing plate 43. And a pressing member 44 that holds the portion 25a together with the fixing plate 43 from the outside in the radial direction. The fixing plate 43 and the pressing member 44 are connected to each other by a connecting tool 45 such as a bolt (see FIG. 4). Accordingly, the cable terminal 2a can be easily held by clamping the fixing plate 43 and the pressing member 44, and the fixing member 42 can be easily attached to the cable terminal 2a and removed from the cable terminal 2a.

  As shown in FIG. 5, the accommodating portion 42 a is a hollow portion formed by assembling the fixing plate 43 and the pressing member 44 together. The accommodating portion 42a is configured to reduce in diameter toward the proximal end G of the cable terminal 2a, that is, toward the insulating coating 21. The inner peripheral surface of the accommodating portion 42 a has a shape corresponding to the substantially truncated cone shape of the enlarged diameter portion 25 a and is in surface contact with the outer peripheral surface of the enlarged diameter portion 25 a of the tubular engagement member 25. In FIG. 5 and the like, for convenience of explanation, the inner peripheral surface of the accommodating portion 42a and the outer peripheral surface of the enlarged diameter portion 25a are shown in a slightly separated state, but in actuality, they are in contact (contact).

As shown in FIG. 4, the fixing plate 43 has three notch-like recesses 43 a that open to the outside in the radial direction of the fixing member 42 and accommodate the enlarged diameter portion 25 a of the tubular engagement member 25 in the cable terminal 2 a. Have. The recess 43 a extends in the thickness direction of the fixed plate 43. As shown in FIG. 5, the accommodation surface of the recess 43a that is in surface contact with the enlarged diameter portion 25a extends from the proximal end G of the cable terminal 2a along the distal end T toward the axis X of the fixing plate 43. Exist.
Furthermore, as shown in FIG. 4, the fixing plate 43 has an insertion hole 43 b through which the connector 45 is inserted in a portion between the recess 43 a and the recess 43 a. The insertion hole 43b penetrates the fixed plate 43 in the thickness direction.

  The fixing plate 43 has a slit 43c extending in the circumferential direction at a portion between the recess 43a and the recess 43a. The connecting flange portion 44b of the pressing member 44 is inserted into the slit 43c. The slit 43c divides the insertion hole 43b halfway in the extending direction (see FIG. 5).

  As shown in FIG. 4, the fixing plate 43 has an insertion hole 43 d into which a connector 41 a for connecting the fixing member 42 into the protective cover 41 is inserted at a position avoiding the slit 43 c. A screw thread is formed on the inner wall of the insertion hole 43d. The insertion hole 43d is formed at a position corresponding to the insertion hole 41b of the protective cover 41.

  The holding member 44 moves close to the opening of the concave portion 43a of the fixed plate 43 in which the enlarged diameter portion 25a is accommodated, and forms the accommodating portion 42a together with the fixed plate 43 to sandwich the enlarged diameter portion 25a. As shown in FIGS. 4 and 5, the holding member 44 has a radially expanded portion 25 a of the tubular engagement member 25 that opens toward the radially inner side of the fixing plate 43 (see FIG. 5A). (Shown by a thick arrow). The pressing portion 44 a extends in the thickness direction of the fixed plate 43. The pressing surface that is in surface contact with the enlarged diameter portion 25a of the pressing portion 44a extends from the proximal end G of the cable terminal 2a along the distal end T so as to be separated from the axis X of the fixed plate 43.

The pressing member 44 has two connecting flange portions 44b that protrude in the circumferential direction of the fixing member 42 at both ends thereof. The connection flange portion 44b has an insertion hole 44c that penetrates in the thickness direction and through which a connection tool 45 described later is inserted. The connecting flange portion 44 b is configured so that the insertion hole 43 b of the fixing plate 43 and the insertion hole 44 c of the pressing member 44 are aligned with each other when attached to the regular position of the slit 43 c of the fixing plate 43. The fixing plate 43 and the pressing member 44 can be connected.
Furthermore, the pressing member 44 has an edge portion 44d (see FIG. 5) for suppressing movement in the direction opposite to the drawing direction of the cable terminal 2a at the end of the pressing portion 44a on the conductor exposed portion 23 side. .

(Eye bracket)
The eye metal fitting 46 is connected and fixed to the outer surface of the protective cover 41, and attached to a pulling device such as a rope, a wire, or a hook for wire drawing. The eye metal fitting 46 is provided at the bottom of the protective cover 41 in FIG. 1 and has an annular portion 46a.

[Insert material]
Furthermore, as shown in FIGS. 1 and 2, the cable terminal pulling structure 1 preferably has an interposing member 5 between terminals 24 attached to each cable terminal 2 a. The interposing member 5 fixes the terminal 24 so as to be separable in an opposing arrangement relationship in which the connection surface for wiring faces inward. When the cable terminal group 3 is pulled or when the cable terminal pulling structure 1 is assembled, the terminal 24 This protects the current-carrying contact surface from being damaged.

In FIG. 1, since the insertion member 5 shows an embodiment in which up to three cable terminals 2a are attached, a rod-like member having a triangular cross-sectional shape is used, but a square or other such member is used. Other cross-sectional shapes such as a square shape are also possible. The material of the insertion member 5 is not particularly limited as long as it can be protected without damaging the connection surface of the terminal when pulled by the pooling eye, but is preferably hard, for example, plastic, hard rubber, hard nylon Etc.
The interposing member 5 and the terminal 24 can be fixed to each other by a fixing device 51 made of, for example, a bolt and a nut through the insertion hole 24 b of the terminal 24. Thereby, since the accommodation volume around the terminal 24 of the cable terminal 2a to be accommodated can be reduced while protecting the connection surface for wiring, the size reduction of the cable terminal traction structure 1 can be achieved.

<Assembly method of cable terminal traction structure>
Next, a method for assembling the cable terminal pulling structure 1 will be described.
First, the insulation coating 21 on one end (tip) side is peeled off to prepare the cable 2 in which the conductor exposed portion 23 of the conductor 22 is formed, and a terminal 24 is attached to the conductor exposed portion 23 to finish wiring. Thereafter, the diameter-enlarged portion 25a of the tubular engagement member 25 is tightly fixed to the insulation coating 21 on the conductor exposed portion 23 side of each cable 2 to form the cable terminal 2a. At this point, all terminal processing is complete.

  The tubular engagement member 25 is tightly fixed by placing the portion where the conductor exposed portion 23 of the cable 2 is located in the mold, casting a molding material in the mold, and molding the tubular engagement member 25 by molding. Is done. The enlarged diameter portion 25a of the tubular engagement member 25 is formed on the outer peripheral surface of the insulating coating 21 by molding.

  Next, the cable terminal 2 a is accommodated and held in the fixing member 42 of the pooling eye 4 in the enlarged diameter portion 25 a of the tubular engagement member 25, and a protective cover 41 described later is attached to form the cable terminal pulling structure 1. First, the enlarged diameter portion 25a of each cable terminal 2a is accommodated in the recess 43a of the fixing plate 43 of the fixing member 42, respectively. Thereafter, the pressing member 44 is moved close to the opening of the recess 43 a to sandwich the enlarged diameter portion 25 a together with the fixing plate 43. Thereby, the position of the cable terminal 2 a is fixed to the fixing member 42.

Finally, in the arrow direction L shown in FIG. 1, the protective cover 41 is put on the cable end group 3 from the distal end side, and the connector 41 a is inserted into the insertion hole 43 d of the fixing plate 43 through the insertion hole 41 b of the protective cover 41. The protective cover 41 and the fixing member 42 are fixed. Thus, the assembly of the cable terminal pulling structure 1 is completed.
The interposition member 5 can be provided between the terminals 24 during or after the position of the cable terminal 2a is fixed to the fixing member 42.

  Next, the pull-out prevention structure will be described with reference to FIG. 6A and 6B are views showing a state in which the cable terminal is held by the fixing member, and FIG. 6A is a state in which the cable is held at the normal position of the fixing member. (B) shows a state in which the cable is pulled and moved from the normal position of the fixing member in the pulling direction.

  When the cable terminal 2a is pulled by the pooling eye 4, the fixing member 42 is moved relative to the cable terminal 2a in the pulling direction P from the position shown in FIG. 6 (a) to the position shown in FIG. 6 (b). There is a tendency to move. Along with this relative movement, the outer peripheral surface forming the substantially truncated cone shape of the enlarged-diameter portion 25a is pressed toward the axis of the cable 2 by the accommodating portion 42a having the inner peripheral surface forming the substantially truncated cone shape of the fixing member 42. Is done. Specifically, since the accommodating portion 42a of the fixing member 42 is in surface contact with the enlarged diameter portion 25a at the inner diameter portion smaller than the outer diameter of the enlarged diameter portion 25a of the tubular engagement member 25, the arrow in FIG. The wedge action conceptually shown by using is generated. By this wedge action, the accommodating portion 42 a of the fixing member 42 presses the outer peripheral surface of the enlarged diameter portion 25 a of the tubular engagement member 25. By this wedge action, the cable terminal 2a can be stably held by the fixing member 42.

<Others>
In addition, the inner peripheral surface shape of the accommodating part 42a should just contact at least partially with the outer peripheral surface of the enlarged diameter part 25a of the tubular engaging member 25, for example, may be cylindrical. That is, it is only necessary that the minimum inner diameter of the accommodating portion 42a be smaller than the maximum outer diameter of the enlarged diameter portion 25a.
Moreover, you may protect a connection surface with a foam sheet, a rubber sheet, etc. instead of the insertion member 5, for example.
The eye metal fitting 46 may be attached by screwing the bolt directly to the fixing plate 43 and screwing it onto the tip of the bolt.

<Modification 1>
Next, Modification Example 1 of the cable terminal of the cable terminal pulling structure 1 will be described with reference to FIG. In addition, about the same structure as said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. 7 shows the structure of the cable terminal according to the first modification. Specifically, FIG. 7 (a) shows the cable terminal in perspective, and FIG. 7 (b) shows the cable terminal partially in cross section. Shown below.

  As shown in FIG. 7, the cable terminal 2 </ b> Aa is a structural portion having a terminal 24 and an insulating and waterproof tubular engagement member 26. The tubular engagement member 26 shown in FIG. 7 has flexibility and insulation formed by molding from a rubber material such as silicone rubber and EP rubber, and is constituted by a normal temperature shrinkable tube. Show. The enlarged diameter portion 26 a is a portion located on the cable main body side of the tubular engagement member 26. The tubular engagement member 26 covers at least a portion of the cable 2 </ b> A straddling the base end portion of the terminal 24 and the insulating coating 21 along the extending direction of the cable 2 </ b> A.

  The tubular engagement member 26 is not formed on the cable 2A by molding. Prior to the step of forming the cable terminal 2Aa, the inner diameter of the tubular engagement member 26 is expanded to several times in advance by inserting, for example, a cylindrical holding member (not shown) configured to be disassembled. Keep it. Next, the expanded tubular engaging member 26 is inserted into the cable 2A from the terminal 24 side, covered to a predetermined position, and then the cylindrical holding member is disassembled and removed. As a result, the tubular engagement member 26 is self-contracted and is firmly fixed to the cable 2A.

  Also in the cable terminal pulling structure using the tubular engagement member 26, the same effects as in the above embodiment can be obtained. In addition, the tubular engagement member 26 does not require any special skill level or fire in manufacturing. Furthermore, since the tubular engagement member 26 is flexible, it adheres along the surface shape of the cable 2A, specifically, the surface shape of the insulating coating 21, the conductor exposed portion 23, and the terminal 24. It is advantageous from the viewpoint.

<Modification 2>
Next, a second modification of the cable terminal of the cable terminal pulling structure 1 will be described with reference to FIG. In addition, about the same structure as said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. FIG. 8 shows the structure of a cable terminal according to the second modification. Specifically, FIG. 8A shows the cable terminal in perspective, and FIG. 8B shows a partial cross-section of the cable terminal. Shown below.

The cable terminal 2Ba shown in FIG. 8 is a structural part having a terminal 24, an insulating and waterproof tubular engaging member 27, and an insulating member 6.
In the second modification, the tubular engagement member 27 is configured by combining two divided members 28 each having an enlarged diameter portion 27a. Although the material of the division member 28 is not specifically limited, For example, a metal material or a synthetic resin material may be used. In the cable 2 </ b> B, the dividing member 28 is fixed in close contact with the outer surface of the insulating coating 21 at a predetermined interval from the conductor exposed portion 23. The dividing member 28 can be fixed to the insulating coating 21 using, for example, an adhesive.

The cable terminal 2Ba has an insulating member 6 that at least covers the conductor exposed portion 23 that is exposed from the base end portion of the terminal 24 in the extending direction, that is, is not covered by the terminal 24. The insulating member 6 is, for example, an insulating tape or an insulating sheet. The insulating member 6 is wound and attached to the distal end side of the insulating coating 21 at a position where the base end portion of the terminal 24 and the enlarged diameter portion 27a are not covered at the cable end. The insulating member 6 may be formed before or after the two divided members 28 are fixed to the cable 2B.
In addition, although the insulating member 6 has shown the case where it forms with a single layer in FIG.8 (b), it can also wind in multiple times and can also form as a laminated body of multiple layers.

  Also in the cable terminal pulling structure using the tubular engagement member 27, the same effect as the above-described embodiment can be obtained.

Further, the shape of the connection partner to which the terminal 24 is attached may be unknown. In such a case, first, the cable 2B that has not been subjected to terminal processing is transported to the connection site. Since the tubular engagement member 27 includes the two divided members 28 and is a separate body from the insulating member 6, it can be easily fixed to the insulating coating 21. Thereby, after confirming the shape of the connection partner and selecting an appropriate terminal 24, it is possible to perform terminal processing on the cable 2B before towing in a wide work space at the connection site.
Furthermore, after the fixing of the tubular engaging member 27 other than the terminal attachment, insulation, and waterproofing treatment is finished, if the pulling eye 4 is pulled in, the terminal 24 corresponding to the shape of the connection partner is attached after the wire is drawn. Then, the vicinity of the end portion may be insulated and waterproofed with a tape or the like. In other words, if the cable 2B having the conductor exposed portion 23 to which the terminal 24 is not attached is pulled to the connection place and the protective cover 41 is removed, the terminal 24 can be immediately attached and the insulating member 6 can be wound.

  The insulating member 6 can also be formed using a heat shrinkable or room temperature shrinkable tube, an insulating and waterproof putty, a resin, or the like.

<Modification 3>
Next, based on FIG. 9, Modification 3 of the cable terminal of the cable terminal pulling structure 1 will be described. In addition, about the same structure as said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. FIG. 9 shows the structure of a cable terminal according to the modification 3. Specifically, FIG. 9A shows the cable terminal of the modification 3 in perspective, and FIG. 9B shows the cable terminal. Partially shown in cross section.

  The cable terminal 2Ca shown in FIG. 9 is a structural part having a terminal 24, an insulating and waterproof tubular engaging member 29, and an insulating member 7. In the third modification, the tubular engagement member 29 is fitted to the insulating coating 21 of the cable 2C. The enlarged diameter portion 29 a is provided on the cable body side portion of the tubular engagement member 29. Although the material of the tubular engagement member 29 is not specifically limited, For example, a metal material or a synthetic resin material may be used.

  The tubular engagement member 29 has a tubular flange 29b that protrudes radially inward in the opening on the conductor exposed portion 23 side. The tubular engagement member 29 is in contact with the terminal 24 on the distal end side of the cable 2C. The tubular engagement member 29 is in contact with the tip of the insulating coating 21 at the flange 29b. The tubular engagement member 29 is configured to be fitted to the cable 2C before the terminal 24 is attached.

The cable 2 </ b> C includes an insulating member 7 that covers at least a contact portion between the terminal 24 and the tubular engagement member 29. The insulating member 7 has at least a conductor exposed portion 23 exposed from the base end portion of the terminal 24 in the extending direction of the cable terminal 2Ca at least the distal end portion of the insulating coating 21, particularly from the terminal 24, that is, not covered by the terminal 24. At least cover. The insulating member 7 is provided after the tubular engagement member 29 is fitted.
The insulating member 7 can be formed using a heat shrinkable tube, an insulating tape or an insulating sheet, a room temperature shrinkable tube, an insulating and waterproof putty, a resin, or the like.

Also in the cable terminal pulling structure using the tubular engagement member 29, the same effects as in the above embodiment can be obtained.
Since the terminal 24 comes into contact with the tubular engagement member 29 and suppresses the movement of the tubular engagement member 29 along the axial direction of the cable terminal 2Ca, the edge 44d of the pressing member 44 can be omitted.

  According to the present invention, at least one cable is pulled and extended to a predetermined connection place without causing damage or deformation with each cable terminal being terminated and the connection surface of the terminal being in a writable state. As a result, the wiring workability at the connection place can be greatly improved.

DESCRIPTION OF SYMBOLS 1 Cable terminal pulling structure 2, 2A, 2B, 2C Cable 2a, 2Aa, 2Ba, 2Ca Cable terminal 3 Cable terminal group 4 Pooling eye 5 Insertion member 6, 7 Insulation member 21 Insulation coating 22 Conductor 23 Conductor exposed part 24 Terminal 25 , 26, 27, 29 Tubular engagement members 25a, 26a, 27a, 29a Expanded portion 28 Dividing member 41 Protective cover 42 Fixing member 42a Housing portion 43 Fixing plate 43a Recess 44 Pressing member 46 Eye fitting

Claims (9)

At least one cable terminal having a terminal mounted on the conductor exposed portion and finished in a state capable of wiring;
A protective cover having an internal space for accommodating the at least one cable terminal in a state where each cable terminal can be wired;
A pooling member having a fixing member that is separably connected to the protective cover and has a dismountable structure for positioning and fixing the cable ends in the protective cover, and an eye bracket that is connected and fixed to the outer surface of the protective cover With eyes,
Each cable terminal has a tubular engagement member having a diameter-enlarged portion of an outer peripheral surface shape that expands toward the conductor exposed portion side in an insulating coating on the conductor exposed portion side in a tightly fixed state,
The fixing member has a housing portion having an inner peripheral surface in a shape that can be held in contact with the outer peripheral surface of the enlarged diameter portion of each cable terminal, and the enlarged diameter portion is held by the accommodating portion, and A cable terminal traction structure, wherein the cable terminals are prevented from being pulled out of a pooling eye. The inner peripheral surface of the housing portion has a shape that decreases in diameter toward the base end side of each cable terminal,
The cable terminal traction structure according to claim 1, wherein a minimum inner diameter of the housing portion is smaller than a maximum outer diameter of the enlarged diameter portion.   The said tubular engaging member is comprised so that an insulation coating may be carried out at least in the part which straddles at least the base end part of the said terminal, and the said insulation coating of each said cable terminal. Cable terminal towing structure.   The cable terminal traction structure according to claim 1, wherein the tubular engagement member is constituted by a plurality of divided members.   5. The cable terminal pulling structure according to claim 4, wherein each of the cable terminals has an insulating member that covers at least the conductor exposed portion that is not covered by a base end portion of the terminal.   The at least one cable terminal is a plurality of cable terminals, and each of the terminals of the plurality of cable terminals is fixed so as to be separable in a facing arrangement relationship in which the wiring connection surfaces face inward. The cable terminal traction structure according to any one of claims 1 to 5, further comprising an insertion member. The fixing member is
A fixing plate provided inside the pooling eye and having a recess for accommodating the enlarged diameter portion of each cable end;
A pressing member that moves close to the opening of the concave portion of the fixed plate in which the enlarged diameter portion is accommodated, forms the accommodating portion together with the fixed plate, and holds the enlarged diameter portion;
The cable terminal traction structure according to any one of claims 1 to 6, further comprising: An assembly method of a cable terminal pulling structure in which a pooling eye is attached to a cable tip including at least one conductor exposed portion,
A terminal is attached to the exposed conductor portion to finish wiring, and then the insulating coating on the exposed conductor portion side has an outer peripheral diameter-shaped enlarged portion that expands toward the exposed conductor portion side. A step of closely fixing the joint member to form a cable end;
A protective cover having an internal space for accommodating the at least one cable terminal in a state in which each cable terminal can be wired, and connected to the protective cover so as to be separable, and positioning each cable terminal in the protective cover A fixing member having a structure capable of being disassembled and having an accommodating portion that prevents the cable terminals from being pulled out, and a fixing member for a pooling eye having an eye bracket connected and fixed to the outer surface of the protective cover; Accommodating and holding the enlarged diameter portion of the terminal to form a cable terminal pulling structure;
A method for assembling a cable terminal traction structure, comprising: In the step of forming the cable terminal,
The tubular engaging member is a flexible member;
The diameter of the tubular engagement member is expanded in advance, and then the tubular engagement member is covered from the terminal side to a predetermined position, and then the expanded diameter of the tubular engagement member is self-contracted, thereby the insulating coating. The method of assembling the cable terminal pulling structure according to claim 8, wherein the cable terminal pulling structure is closely fixed to the cable terminal.

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