JP2013027158A - Cable clamp structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable clamp structure which easily simplifies the removal prevention operation of a cable.SOLUTION: A cable clamp structure comprises: a spacer member 5 including a cable insertion part 4 into which a cable A is inserted; a box body part 3 in which the spacer member 5 is slid and attached along the longitudinal direction of the cable A; a seal member 6 fitted onto the end part side of the cable A protruding from the space member 5 and compressively held by the spacer member 5 and the box body part 3; and a clamp member 7 which may engage with the spacer member 5, the box body part 3, and the cable A from the direction intersecting with the longitudinal direction of the cable A in the state where the space member 5, into which the cable A is inserted, is attached to the box body part 3.

Description

  The present invention relates to a cable clamp structure in which a cable introduction hole is formed in a box body portion such as a junction box, and a cable introduced into the box is prevented from being removed through the cable introduction hole.

  As a junction box, for example, there is a terminal box for a solar cell panel. In the conventional cable clamp structure of the terminal box, the cap body that is externally fitted to the cable is screwed into the box body, and introduced into the box through the cable introduction hole. The cable is prevented from coming off and the seal member is compressed and held to seal the gap between the cable introduction hole and the cable (see, for example, Patent Document 1).

JP 2011-18673 A

To secure the cable securely by screwing it into the box body of the cap and to securely seal the gap between the cable introduction hole and the cable, for example, the screw part with a small screw pitch and difficult to loosen is attached to the cap and the box. It is necessary to form over the main body.
For this reason, in the conventional cable clamp structure, in order to securely prevent and seal, it is necessary to rotate the cap many times and screw it into the box main body, which may complicate the cable retaining operation. There is.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cable clamp structure that facilitates simplification of a cable retaining operation.

  The first characteristic configuration of the cable clamp structure according to the present invention includes a spacer member having a cable insertion portion for inserting a cable, a box body portion for slidingly mounting the spacer member along the longitudinal direction of the cable, and the spacer member. A state in which a seal member that is extrapolated to the end portion side of the cable protruding from the cable and compressed and held by the spacer member and the box main body portion and the spacer member through which the cable is inserted is attached to the box main body portion Thus, the spacer member, the box main body portion, and the cable are provided with a clamp member that can be engaged from a direction intersecting the longitudinal direction of the cable.

The cable clamp structure of this configuration includes a spacer member having a cable insertion portion for inserting a cable, a box body portion for slidingly mounting the spacer member along the longitudinal direction of the cable, and an end portion side of the cable protruding from the spacer member And a seal member that is compressed and held by the spacer member and the box main body.
For this reason, the spacer member with the cable inserted through the cable insertion part is slid onto the box body along the longitudinal direction of the cable with the sealing member inserted on the protruding end side of the cable from the spacer member. By doing so, the seal member is compressed by the spacer member and the box body.
In addition, a clamp member that can be engaged with the spacer member, the box main body, and the cable from the direction intersecting the longitudinal direction of the cable in a state where the spacer member into which the cable is inserted is mounted on the box main body. .
For this reason, the operation of engaging the clamp member with the spacer member, the box body, and the cable from the direction intersecting the longitudinal direction of the cable prevents the cable from being detached and holds the seal member in a compressed state. The gap between the cable introduction hole and the cable can be sealed.
Therefore, with the cable clamp structure of this configuration, the clamp member can be moved from the direction intersecting the longitudinal direction of the cable without the complicated operation of rotating the cap many times and screwing it into the box body. By engaging with the spacer member, box body, and cable, the cable can be prevented from being detached, and the gap between the cable introduction hole and the cable can be sealed, simplifying the work of retaining the cable. It is easy to plan.

  According to a second characteristic configuration of the present invention, the box main body portion includes a first insertion portion capable of inserting the spacer member in the cable longitudinal direction from the outside of the box, and the spacer member and the first insertion portion are connected to the cable. The point is that they are engaged with each other in the radial direction.

  In this configuration, the spacer member and the box body are engaged with each other in the cable radial direction by inserting the spacer member into the first insertion portion from the outside of the box in the cable longitudinal direction. The movement in the cable radial direction can be restricted.

  According to a third characteristic configuration of the present invention, the clamp member includes a cable engagement portion that can be engaged with the cable from a cable radial direction and engageable in a cable longitudinal direction, and the cable engagement portion includes: A clamp groove having a U-shaped cross section surrounding the outer peripheral surface of the cable is formed in the clamp member, and a plurality of engagement claws that are engaged with the cable from the cable radial direction are integrally formed on the inner surface of the clamp groove. It is in the point which is constituted.

With this configuration, when the cable is prevented from coming off, a clamp groove having a U-shaped cross section is formed in the clamp member, and a plurality of engaging claws integrally formed on the inner surface thereof are connected to the cable in the cable radial direction. Can be enrolled from.
For this reason, the cable can be pressed against the entire inner surface of the clamp groove by engaging the cable with a plurality of engagement claws with a plurality of engaging claws rather than locally with respect to the inner surface of the clamp groove, and the cable is hardly damaged. .

  According to a fourth characteristic configuration of the present invention, the clamp member includes a main body engaging portion that is engaged with the box main body portion from the cable radial direction and engageable in the cable longitudinal direction, and the main body engaging portion is An engaging portion that engages with the box main body from the radial direction of the cable is formed integrally with the clamp member.

  If it is this structure, the movement to the cable longitudinal direction of a clamp member can be controlled by engaging the engaging part formed in the clamp member with respect to a box main-body part from a cable radial direction.

  According to a fifth characteristic configuration of the present invention, the box body portion includes a first insertion portion in which the spacer member can be inserted in the cable longitudinal direction from the outside of the box, and the seal member in the cable longitudinal direction from the outside of the box. The seal member is compressed and held by the spacer member inserted into the first insertion portion.

  With this configuration, the seal member extrapolated to the protruding end portion side from the cable spacer member is controlled in the first direction while restricting deformation in the cable radial direction inside the second insertion portion formed in the box main body portion. The gap between the cable introduction hole and the cable can be surely sealed by compressing and holding the spacer member inserted in the insertion portion.

  A sixth characteristic configuration of the present invention is that the spacer member includes a clamp insertion portion capable of inserting the clamp member from a cable radial direction.

  If it is this structure, the relative movement along the cable longitudinal direction of a clamp member and a spacer member and the relative movement along the cable longitudinal direction of the said clamp member by a clamp member engaging with a cable can be controlled.

The cable clamp structure is shown, (a) is a perspective view seen from the upper surface side of the terminal box, (b) is a perspective view seen from the lower surface side of the terminal box, and (c) is a cross-sectional view. It is a disassembled perspective view of a cable clamp structure. The box body is shown, (a) is a perspective view as seen from the upper surface side of the terminal box, (b) is a perspective view as seen from the lower surface side of the terminal box, and (c) is a longitudinal sectional view. The spacer member is shown, (a) is a perspective view seen from the upper surface side of the terminal box, (b) is a perspective view seen from the lower surface side of the terminal box, and (c) is a longitudinal sectional view. A clamp member is shown, (a) is the perspective view seen from the terminal box upper surface side, (b) is a top view, (c) is a bottom view. It is a perspective view which shows the assembly method of a cable clamp structure.

Embodiments of the present invention will be described below with reference to the drawings.
FIGS. 1-5 shows the cable clamp structure by this invention provided in the terminal box (an example of a junction box) for solar cell panels.

  As shown in FIG. 1, the terminal box is a terminal plate 1 that electrically connects an output terminal (not shown) of the solar cell module and a core wire A1 of a cable A that extracts power from the output terminal to the outside. In addition, it has a well-known configuration in which a bypass diode (not shown) for preventing backflow is built in the resin box body B.

  As shown in FIGS. 1 and 2, the box main body B integrally has a box main body portion 3 in which a cable introduction hole 2 is formed, and the cable A introduced into the box main body B through the cable introduction hole 2. The cable clamp structure according to the present invention prevents the cable from coming off.

  The cable clamp structure includes a resin spacer member 5 having a cable insertion portion 4 through which the cable A is inserted, a resin box main body portion 3 in which the spacer member 5 is slid along the cable longitudinal direction, and the cable A and the cable introduction. A cylindrical elastic seal member 6 for sealing a gap with the hole 2 and a resin clamp member 7 for preventing the cable A from coming off are provided.

  As shown in FIG. 3, the box body 3 has a first insertion portion 8 in which the spacer member 5 can be inserted in the cable longitudinal direction from the outside of the box, and a seal member 6 in the cable longitudinal direction from the outside of the box. The possible cross-sectional shape is formed in a bilaterally symmetric shape including a series of second insertion portions 9 having a circular shape.

The first insertion portion 8 is formed in a symmetrical left and right groove shape along the longitudinal direction of the cable, and has a downward U-shaped cross section that opens toward the lower side of the terminal box.
Long horizontal ribs 10 are formed along the longitudinal direction of the cable at intermediate positions in the vertical direction (depth direction of the terminal box) of the left and right groove side surfaces forming the first insertion portion 8.

  The spacer member 5 is slidably attached to the first insertion portion 8 along the longitudinal direction of the cable, and the cable A inserted through the cable introduction hole 2 is inserted into the cable introduction hole 2 on the outer side of the box body portion 3. Hold concentric with the shaft core.

  As shown in FIG. 4, the spacer member 5 has a pair of front and rear cable insertion holes 11 in the longitudinal direction of the cable and a space in which the clamp member 7 is fitted from the terminal box lower surface side to the upper surface side, that is, from the cable radial direction. It has a clamp insertion portion 12 to be formed, and long groove portions 13 are formed on both the left and right sides along the cable longitudinal direction.

  The clamp insertion portion 12 includes a cable receiving surface 14 having a circular cross section for receiving the outer peripheral surface side of the cable A inserted over the front and rear cable insertion holes 11 and a rectangular clamp that opens toward the lower surface side of the terminal box. A member insertion opening 15 and a pair of tip insertion holes 17 into which the tip end portions 16 of the clamp member 7 are inserted are provided.

The clamp insertion part 12 is provided in a state of opening to the bottom side of the concave groove part 13.
The spacer member 5 and the first insertion portion 8 are engaged with each other in the radial direction of the cable by inserting the lateral rib 10 into each of the concave groove portions 13.
Therefore, the protruding end portion of the lateral rib 10 enters the clamp insertion portion 12 from the bottom side of the concave groove portion 13 in a state where the horizontal rib 10 is inserted into each of the concave groove portions 13.

  The seal member 6 protrudes from the spacer member 5 by inserting the spacer member 5 having the cable A inserted through the cable insertion hole 11 into the first insertion portion 8 in a state in which the seal member 6 is already inserted into the second insertion portion 9. The cable A is extrapolated to the end side of the cable A and is compressed and held by the spacer member 5 and the box body 3.

  The clamp member 7 is connected to the spacer member 5, the box main body 3, and the cable A in a state where the spacer member 5 through which the cable A is inserted is inserted into the first insertion portion 8 and attached to the box main body 3. It is provided so as to be engageable from a direction orthogonal to the longitudinal direction of A.

  For this purpose, as shown in FIG. 5, the clamp member 7 is engaged with the cable A from the cable radial direction and engageable in the cable longitudinal direction, and the box main body portion 3. The main body engaging portion 19 is engaged from the cable radial direction and engageable in the cable longitudinal direction.

The cable engaging portion 18 is formed with a clamp groove 7 having a U-shaped cross section surrounding the outer peripheral surface of the cable A in the clamp member 7 and a plurality of engaging claws 21 engaged with the cable A from the cable radial direction. The inner surface of the clamp groove 20 is integrally formed.
The plurality of engaging claws 21 are formed in a sawtooth shape in which the protrusions having a long cross-sectional shape are triangular in the cable longitudinal direction along the insertion direction of the clamp member 7 with respect to the clamp insertion portion 12 (hereinafter referred to as the clamp insertion direction). Arranged and provided.

  The main body engaging portion 19 is integrally formed with a plurality of engaging portions 22 having a rectangular cross-sectional shape along the clamp insertion direction on both the left and right sides of the clamp member 7 at intervals in the cable longitudinal direction. A plurality of main body engaging grooves 23 into which 22 is inserted from the clamp insertion direction are integrally formed on the protruding end portion of the lateral rib 10 formed in the first insertion portion 8.

A method for assembling the cable clamp structure will be described.
As shown in FIG. 6A, after the seal member 6 is inserted into the second insertion portion 9 in advance, the spacer member 5 is inserted into the first insertion portion 8.
Next, the cable A with the core wire A1 exposed is sequentially inserted into the pair of front and rear cable insertion holes 11 of the spacer member 5, the inner peripheral side of the seal member 6, and the cable introduction hole 2 of the box body 3. , Introduced into the box body B.

  Next, as shown in FIG. 6B, the clamp member 7 is inserted into the clamp insertion portion 12 of the spacer member 5 so that the plurality of engagement claws 21 are engaged with the cable A, and the engagement portion 22 is Engage with the main body engaging groove 23.

  Therefore, the clamp member 7 is orthogonal to the longitudinal direction of the cable A with respect to the spacer member 5, the box main body 3, and the cable A in a state where the spacer member 5 through which the cable A is inserted is attached to the box main body 3. Engaging from the direction, the cable A is prevented from coming off in a state where the gap with the cable introduction hole 2 is sealed.

[Other Embodiments]
1. The cable clamp structure according to the present invention may include a clamp member 7 that can be engaged with the spacer member 5, the box main body 3, and the cable A from a direction obliquely intersecting the longitudinal direction of the cable A. .
2. The cable clamp structure by this invention may be provided in various junction boxes other than the terminal box for solar cell panels.

3 Box body portion 4 Cable insertion portion 5 Spacer member 6 Seal member 7 Clamp member 8 First insertion portion 9 Second insertion portion 12 Clamp insertion portion 18 Cable engagement portion 19 Main body engagement portion 20 Clamp groove 21 Engagement claw 22 Entrance A cable

Claims (6)

A spacer member having a cable insertion portion for inserting a cable;
A box body for slidingly mounting the spacer member along the longitudinal direction of the cable;
A seal member extrapolated to the end side of the cable protruding from the spacer member, and compressed and held by the spacer member and the box body portion;
A clamp that can be engaged with the spacer member, the box main body, and the cable from a direction that intersects the longitudinal direction of the cable in a state in which the spacer member through which the cable is inserted is attached to the box main body. And a cable clamp structure. The box body portion includes a first insertion portion capable of inserting the spacer member in the cable longitudinal direction from the outside of the box,
The cable clamp structure according to claim 1, wherein the spacer member and the first fitting portion are engaged with each other in a cable radial direction. The clamp member includes a cable engaging portion that can be engaged with the cable from the cable radial direction and engageable in the cable longitudinal direction,
The cable engaging portion is formed with a clamp groove having a U-shaped cross section surrounding the outer peripheral surface of the cable in the clamp member, and a plurality of engaging claws to be engaged with the cable from the cable radial direction. The cable clamp structure according to claim 1 or 2, wherein the cable clamp structure is formed integrally with the inner surface of the groove. The clamp member includes a main body engaging portion that is engaged with the box main body portion from the cable radial direction and engageable in the cable longitudinal direction,
The cable clamp according to any one of claims 1 to 3, wherein the main body engaging portion is formed by integrally forming an engaging portion for engaging with the box main body portion from the cable radial direction in the clamp member. Construction. The box body includes a first insertion portion that allows the spacer member to be inserted in the cable longitudinal direction from the outside of the box, and a second insertion portion that allows the seal member to be inserted in the cable longitudinal direction from the outside of the box. In preparation for the series,
The cable clamp structure according to any one of claims 1 to 4, wherein the seal member is compressed and held by the spacer member inserted into the first insertion portion.   The cable spacer structure according to any one of claims 1 to 5, wherein the spacer member includes a clamp insertion portion in which the clamp member can be inserted from a cable radial direction.

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