JP2015104301A - Terminal box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal box capable of assuring a high cable holding force even in a case where a pulling-out force or a bending force acts on a cable, with assembling workability that uses a clamp member being good.SOLUTION: A clamp housing part is provided at a cable pulling-out portion of a box-like body that receives a terminal. A cable insert hole is provided at the clamp housing part. A recessing part that encloses a lower semi-circle portion of the cable is provided on a bottom surface of the clamp housing part. A counter recessing part that encloses an upper semi-circle portion of the cable is provided at a cable clamp. The cable clamp is assembled in the clamp housing part. A cable is pinched between the recessing part and the counter recessing part. Even in a case where a bending force to bend to a body upper surface side acts on a cable, a bending deformation of the cable in such direction of removing the clamp member can be relaxed by a cable regulation part. Thus, dropout caused by disengagement or rising of the clamp member due to bending deformation of the cable can be prevented, to assure holding force of the cable by the clamp member.

Description

  The present invention relates to a terminal box, and more particularly to a terminal box having a cable clamp structure for holding a cable drawn from the terminal box to the outside.

  Conventionally, various types of terminal boxes are used for electrical connection between devices. For example, in a solar battery panel of a solar power generation system, there are ones in which a plurality of solar battery modules are arranged vertically and horizontally, and a terminal box to which an external output cable is connected is attached to each solar battery module (for example, Patent Document 1). reference).

  In the terminal box as described above, a box type in which a terminal connected to the positive and negative electrodes of the solar cell module and to which an external connection cable is connected is provided inside, and an upper surface is opened to receive the terminal. And a lid that covers the upper surface of the main body are made of a synthetic resin material. The external connection cable is extended outside the terminal box and fixed in place at the time of installation. Since a pulling force may be applied to the cable by some external force until the cable is fixed in the wiring work of the cable, the terminal box is required to have a high pulling resistance against the pulling force applied to the cable.

JP 2009-302590 A

  As a structure that enhances the pull-out resistance of the cable in the terminal box, for example, the main body is provided with a concave portion opened on the upper surface side, the cable clamp is provided with an opposing concave portion that sandwiches the cable together with the concave portion of the main body, It is possible to hold down and fix. In that case, it is possible to counter the force of pulling out the cable by providing a protrusion that bites into the cable sheath on the inner peripheral surface of the recess, but the cable is bent in the direction in which the cable clamp is released. In such a case, there is a risk that the cable holding force may be weakened due to the opening between the two recesses.

  Therefore, the present applicant uses the clamp member in which the opening surface of the concave portion provided in the main body is the back surface side of the main body, and a counter concave portion is formed to oppose the concave portion, and the clamp member from the back surface side to the portion provided with the concave portion of the main body. A clamp structure has been proposed in which a cable is fixed by being sandwiched between both concave portions by assembling (Japanese Patent Application No. 2011-050526). According to this, in a state where the terminal box is fixed to the back surface of the solar cell module, the clamp member is placed between the back surface of the solar cell module and the main body, and even if an external force that bends to the main body side acts on the cable. Since it is received by the concave portion of the main body, there is no possibility that the cable holding force is reduced.

  However, it is necessary to assemble the cable clamp from the back side of the terminal box, and after installing the cable clamp, it is necessary to assemble and inspect other parts after turning the terminal box upside down. There was a problem of complication.

  Resolving these issues, ensuring a high cable holding force even when a pulling force or bending force is applied to the cable extended from the terminal box, and realizing a terminal box with good assembly work using a clamp member Therefore, in the present invention, a terminal box that holds an intermediate portion of an external connection cable connected to a terminal in a fixed state, the terminal box receiving the terminal and having an upper surface open. A box-shaped main body and a lid that covers the upper surface of the main body, and the main body is formed to engage with at least a portion of the cable that extends outward from the main body and faces the upper surface. And a recessed portion formed in a shape that holds the lower half opposite to the upper surface side of the cable and provided closer to the terminal side than the cable restricting portion. It was assumed to the provided with opposed recesses formed in the shape for holding the cable and clamp member mounted from the top side to the main body is provided between the recessed portion.

  According to this, by pinching the cable between the recessed portion of the main body (body) and the opposed recessed portion of the clamp member, it is possible to resist the pulling force of the cable, and the portion that holds the cable Since the cable restricting part formed to engage with at least the part of the cable facing the upper surface of the main body is provided in a different part from the cable, a bending force that bends to the upper surface of the main body acts on the outside of the terminal box of the cable. Even when the cable is bent in the direction to remove the clamp member, the bending deformation of the cable in the direction to remove the clamp member can be mitigated by the cable restricting portion. Therefore, the holding force of the cable by the clamp member is ensured.

  In particular, the cable restricting portion may be provided on a convex portion protruding from the main body so as to hold the cable in an inserted state. According to this, a cable control part can be provided in the position far from the part clamped by a clamp member, and the influence which tries to remove the clamp member by the bending of a cable can be made still smaller.

  The cable restricting portion includes a standing portion standing on the bottom surface of the main body at one side position of the cable and an arm portion extending from the standing portion to a portion facing the top surface of the cable. It is good to be formed in the shape which has.

  According to this, since the side opposite to the standing part of the cable restricting part is open, when assembling the cable to the cable restricting part, the cable can be assembled so as to be hooked from the open side of the cable restricting part. In addition to being easy to assemble, it can be assembled even when the terminal is coupled to the cable, and workability is good.

  Moreover, the said cover body is good to have integrally the shielding part formed so that the open part of the side opposite to the said standing part of the said cable control part might be closed.

  According to this, the open side of the cable restriction part of the main body is closed by the shielding part of the cover (cover) with respect to the cable restriction part that can be easily assembled by hooking the cable from the side. Even when the cable is bent in the direction of removing the clamp member in the assembled state to the main body of the lid, the range where the bending deformation occurs can be stopped by the cable restricting portion, and the clamp member is prevented from coming off. be able to.

  In the terminal box, a back surface on the side opposite to the top surface of the main body may be fixed to an object to be fixed.

  According to this, the assembly procedure of the terminal box has become complicated because it is necessary to assemble and inspect other parts after the terminal box is turned upside down after the cable clamp is assembled. The direction in which the clamp member is attached is the same as the direction in which other parts are assembled or inspected, and the workability of the work performed simultaneously with the assembly of the clamp member can be improved.

  As described above, according to the present invention, by holding the cable between the recessed portion of the main body and the opposing recessed portion of the clamp member, it is possible to resist the pulling force of the cable and to hold the cable. Since the cable restricting portion formed to engage with at least the portion of the cable that faces the upper surface of the main body is provided in a portion different from the portion, a bending force that bends toward the upper surface of the main body is provided on the outer side of the terminal box of the cable. Even when the cable is bent in the direction to remove the clamp member, the bending restriction of the cable in the direction to remove the clamp member can be mitigated by the cable restricting portion. Since it is possible to prevent falling off due to lifting or coming off, the holding force of the cable by the clamp member is ensured.

It is a principal part assembly exploded perspective view of the terminal box based on this invention. (A) is a top view of a clamp accommodating part, (b) is sectional drawing seen in the arrow direction along the IIb-IIb line | wire of (a). It is a figure which shows the clamping procedure of the cable by a cable clamp. It is a principal part expansion perspective view which shows the state which assembled | attached the cable clamp. It is the principal part fracture | rupture perspective view seen from the arrow V line direction of FIG. (A) is a main part disassembled perspective view showing a second example, and (b) is a perspective view corresponding to (a) showing the main part in an assembled state by breaking it. (A) is a main part disassembled perspective view showing a third example, (b) is a perspective view corresponding to (a) showing the main part in the assembled state of (a). (A) is principal part sectional drawing seen by fracture | ruptured along the axis line of a terminal box, (b) is sectional drawing seen in the arrow direction along the VIIIb-VIIIb line | wire of (a).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an essential part of a terminal box 1 according to the present invention. The terminal box 1 is used by being fixed to the back surface of the solar cell module 2 in the solar power generation system to which the present invention is applied. In addition, it demonstrates using the up-down direction which makes the solar cell module 2 side down.

  The terminal box 1 is formed of a synthetic resin material. As shown in FIG. 1, the terminal box 1 has a body 3 as a flat, substantially rectangular box-shaped main body that opens upward, and substantially covers the upper surface of the body 3 in the drawing. The cover 4 is a cover having a rectangular box shape, and the cable clamp 7 is a clamp member for fixing the external connection cable 6 to the body 3. In the illustrated example, two external connection cables 6 are wired, and cable clamps 7 are also arranged in two places accordingly.

  In the illustrated example, an inner peripheral wall 3b made of a peripheral wall that is closed over the entire circumference except for a portion where the cable 6 is drawn is provided inside the outer peripheral wall 3a of the body 3. In the inner side surrounded by the inner peripheral wall 3b, a plurality of terminals (not shown) are arranged in the illustrated example that is electrically connected to the lead wires (not shown) of the solar cell module 2. In addition, although the adjacent thing of each terminal is connected via the diode, the structure of those terminals and diodes, such as a shape and number, may be the same as a well-known product, The detailed description is abbreviate | omitted.

  One end of the cable 6 corresponding to each of the terminals located at both ends in the arrangement direction is connected. The body 3 is provided with two clamp accommodating portions 11 for assembling the cable clamp 7 in the accommodated state. The clamp housing portion 11 is provided so as to protrude outward from the short side of the rectangular body 3, and the upper surface side of the body 3 is open. The opened upper surface of the clamp housing portion 11 is covered with a correspondingly formed portion of the cover 4. The clamp housing portion 11 is formed by a portion in which a part of the outer peripheral wall 3a is protruded laterally from the short side of the rectangular body 3 as described above, and a part of the inner peripheral wall 3b. In the outer peripheral wall 3a and the inner peripheral wall 3b forming the clamp housing portion 11, the portion through which the cable 6 passes is open to the inside and outside of the body 3, but the other portions are extended portions of the outer peripheral wall 3a and the inner peripheral wall 3b. Surrounded by The cable 6 having one end connected to the terminal passes through the clamp housing portion 11 formed in this way and is drawn out to the outside. In addition, the clamp accommodating part 11 of the example of illustration is an example, and if it is a shape which accommodates the cable clamp 7, it will not be restricted to the said shape, For example, the shape where the clamp accommodating part 11 does not protrude from the body 3 may be sufficient.

  FIG. 2A is a top view of the clamp accommodating portion 11 viewed with the cover 4 removed, and FIG. 2B is a cross-sectional view taken along the line IIb-IIb in FIG. is there. As shown in the drawing, a cable placing portion 12 integrally formed with the body 3 is provided on the bottom portion which is the lower side of the clamp housing portion 11, and the cable placing portion 12 has a half circumference of the cable 6. A recessed portion 12a having a shape with the semi-cylindrical surface holding the surface facing upward is formed. The cable 6 connected to the terminal 5 passes through the clamp housing portion 11 and is drawn out from the terminal box 1, but is placed on the semi-cylindrical surface of the recessed portion 12a.

  As shown also in FIG. 3, the cable clamp 7 hangs down on both sides of the cable 6 from the semicircular body 13 straddling the upper half of the cable 6 and from both ends in the circumferential direction of the body 13. The pair of elastic leg pieces 14 extended in this manner and the end wall portions 15a and 15b provided at both ends in the axial direction of the body portion 13 are formed integrally. An end wall portion 15a on one end side in the axial direction of the trunk portion 13 (on the drawing direction side of the cable 6) is formed in a substantially semicircular outward flange shape whose diameter is larger than that of the trunk portion 13, and the other end side in the axial direction (body 3). End wall portion 15b is formed in a rectangular plate shape, and flange portions 20 are provided on both side edges extending in the vertical direction of the end wall portion 15b. The body portion 13 is provided with an opposing recessed portion 13a made of a downwardly facing semi-cylindrical surface so as to hold the half circumference of the cable 6. The extending ends of the pair of elastic leg pieces 14 are respectively provided with locking claws 14a protruding inwardly facing each other.

  The width of the cable mounting portion 12 (the width in the direction crossing the recessed portion 12a in the radial direction of the semi-cylindrical surface) is substantially the same as the inner width of both elastic leg pieces 14 of the cable clamp 7. In the lower portion of the cable mounting portion 12, there are provided engaging recesses 16 recessed inward so that the locking claws 14a of the pair of elastic leg pieces 14 of the cable clamp 7 can be engaged.

  4 is an enlarged perspective view of a main part showing a state in which the cable clamp 7 is assembled to the clamp housing part 11, and FIG. 5 is a cutaway perspective view of the main part corresponding to FIG. As shown in the drawing, an insertion hole 17 that can hold the cable 6 drawn out to the outside is formed in the end wall portion 11a facing the drawing direction of the cable 6 of the clamp housing portion 11.

  The lower portion of the insertion hole 17 is recessed toward the clamp housing portion 11 with respect to the outer wall surface of the end wall portion 11a, and the lower half peripheral portion of the insertion hole 17 is defined by the semi-cylindrical surface of the recess portion 12a. ing. In the end wall portion 11a, the portion surrounding the upper half-circumferential portion 17a of the insertion hole 17 is expanded in diameter in the thickness direction of the end wall portion 11a, and the cross-sectional shape of the upper portion of the insertion hole 17 is stepped. Is formed. As described above, since the upper half-circumferential portion of the insertion hole 17 is displaced outward in the axial direction of the cable 6 with respect to the lower half-circumferential portion, when the cable 6 is passed through the insertion hole 17, Even if the outer diameter of 6 and the inner diameter of the insertion hole 17 are the same, the insertion work of the cable 6 is facilitated.

  On the terminal 5 side (inside the body 3) of the clamp housing portion 11, a part of the inner peripheral wall 3 b is cut out and protrudes in a direction facing each other at the cut out portion, and in the vertical direction (in the axial direction of the recessed portion 12 a). A pair of columnar portions 11b extending in a direction orthogonal to each other is provided (see FIGS. 2 and 3). The two columnar portions 11b are provided with a pair of groove portions 18 having a concave cross-sectional shape and facing each other.

  In order to fix the cable 6 in a clamped state by the cable mounting portion 12 and the cable clamp 7, the cable clamp 7 is inserted from above the clamp housing portion 11 as shown by the arrow in FIG. At this time, the pair of flange portions 20 of the end wall portion 15 b are inserted into the groove portion 18 while being aligned with and slide on the pair of groove portions 18.

  The recessed portion 12a and the opposed recessed portion 13a are each formed in a shape that surrounds the semicircular portion of the cable 6 each. Further, both side edge portions of the opposing recessed portion 13a of the body portion 13 and both side edge portions of the recessed portion 12a of the cable placement portion 12 are formed so as to be in surface contact with each other. Thereby, in the state which the cable mounting part 12 and the trunk | drum 13 contact | abutted, the cylindrical surface of the internal diameter equivalent to the outer diameter of the cable 6 is formed by the recessed part 12a and the opposing recessed part 13a.

  With the cable clamp structure thus configured, the cable clamp 7 is clamped as shown by the arrow in FIG. 3 with the cable 6 inserted through the insertion hole 17 placed on the semi-cylindrical surface of the recessed portion 12a. As shown in FIG. 2 (b), the recesses 12 a and the cable clamp 7 are engaged by inserting the latching claws 14 a of the both elastic leg pieces 14 into the engagement recesses 16. The cable 6 can be sandwiched and fixed in the radial direction between the opposing recessed portion 13a. The method of fixing the cable clamp 7 is not limited to the engagement between the locking claw 14a of the elastic leg piece 14 and the engagement recess 16, and any method may be used as long as the cable clamp 7 is fixed to the body 3. For example, in addition to screwing or bonding, various known fixing methods may be used.

  A plurality of circumferential ridges 21 and 22 are respectively arranged at positions facing and spaced apart from each other on the semi-cylindrical surfaces of the recessed portion 12a and the opposed recessed portion 13a. The circumferential ridges 21 and 22 bite into the jacket of the cable 6 to some extent while the cable 6 is sandwiched between the recessed portion 12a and the opposed recessed portion 13a. Thereby, in the clamp structure by the recessed portion 12a and the cable clamp 7, it is possible to secure a holding force that resists the pulling force acting on the cable 6.

  Moreover, in the terminal box assembled | attached to the apparatus installed outdoors like this embodiment, it is required to ensure insulation by watertightness. As described above, since terminals and diodes are received inside the inner peripheral wall 3b, potting is performed in which an inner portion surrounded by the inner peripheral wall 3b is filled with a potting material (for example, a silicone-based filler). The potting material is not limited to the silicone type, and various materials such as a urethane type and an acrylic type can be applied. Potting is performed after the assembly of the parts to the body 3 is completed and the terminal box 1 that has been assembled is attached to the solar cell module 2. The cable 6 is connected to the terminal and pulled out to the outside through the insertion hole 17. In this state, the inner part surrounded by the inner peripheral wall 3 b is potted, and then the cover 4 is assembled to the body 3.

  In the form in which the cable 6 does not hold the cable 6 by the cable clamp 7, the clamp housing portion 11 is in communication with the inner portion surrounded by the inner peripheral wall 3 b due to the shape in which a part of the inner peripheral wall 3 b is cut as described above. is there. On the other hand, in the state where the cable clamp 7 is assembled and the cable 6 is held as described above, the inner portion surrounded by the inner peripheral wall 3b and the clamp housing portion 11 are separated by the end wall portion 15b and the inserted cable 6. Blocked. Therefore, the inside surrounded by the inner peripheral wall 3b and the end wall portion 15b is secured to the outside by the potted potting material.

  The open upper surface of the clamp housing portion 11 is covered with a part of the cover 4 that covers the open upper surface of the body 3. In the present embodiment, the height of the end wall portion 15b of the assembled cable clamp 7 and the height of the inner peripheral wall 3b are the same, and the upper surface of the inner peripheral wall 3b is attached with the cover 4 attached to the body 3. When the back surface of the cover 4 comes into contact with the cover 4, the end wall portion 15 b can be pressed by the cover 4, and the cable 4 can be prevented from coming off by the cover 4.

  In the terminal box 1 configured as described above, the pulling force (arrow F in FIGS. 4 and 5) or the like is applied to the terminal box 1 in the routing operation of the cable 6 at the site construction of the solar cell module 2. A bending force (arrow M in FIGS. 4 and 5) may act. As described above, the holding force of the cable 6 in the pulling-out direction of the cable 6 is ensured by clamping the recessed portion 12a and the opposed recessed portion 13a of the cable clamp 7 with the circumferential protrusions 21 and 22. For the pulling force F, the flange portion 20 of the other end wall portion 15b is engaged with the groove portion 18 on the body 3 side, and the outward flange-shaped portion of the one end wall portion 15a of the cable clamp 7 is It can contact | abut to the inner wall face of the end wall part 11a. Since the contact direction of the end wall portions 15a and 15b is the pulling direction of the cable 6, the pulling force F of the cable 6 can be sufficiently resisted.

  Further, the bending deformation of the cable 6 when the bending force M is applied is restricted by an inverted U-shaped cable restricting portion 19 formed in the end wall portion 11a so as to demarcate the upper half peripheral portion of the insertion hole 17. can do. As a result, a bending force M that bends to the upper side of the cable 6 (side away from the solar cell module 2) acts on the outside of the terminal box 1, and the bending of the cable 6 causes the cable clamp 7 to be removed. Even if it becomes, the range which the bending deformation produces can be made to the cable control part 19. Therefore, the force in the direction of removing the cable clamp 7 is relaxed, and the cable clamp 7 can be prevented from coming off.

  The terminal box 1 can be fixed to the solar cell module 2 by bonding the back surface of the body 3 by, for example, bonding. As described above, since the cable clamp 7 is inserted from above the clamp housing 11 and attached to the body 3, the direction in which the cable clamp 7 is attached is the direction in which other components (terminals, diodes, etc.) are assembled or inspected ( The direction in which the inside is viewed from the opening side of the body 3) can be improved, and the workability of the work performed simultaneously with the assembly of the clamp can be improved.

  FIG. 6A is an exploded perspective view of main parts showing a second example, and FIG. 6B is a perspective view corresponding to FIG. In addition, the same code | symbol is attached | subjected to the part similar to the said example of illustration, and the detailed description is abbreviate | omitted (hereinafter the same). In the above illustrated example, the terminal box used for the solar cell module has been described. However, any device having a clamp structure for a cable connected to the terminal may be used. As a second example, the cable 6 and other cables (not shown) are used. The terminal box 31 for connecting and connecting is shown below. In addition, although the terminal box 31 shows only a part of one end in the axial direction in the figure, the other is long in the axial direction and the other end is symmetrically provided in the same shape and connected to the other end side. Cable is connected.

  The terminal box 31 of the illustrated example includes a case main body 32 formed in a long and narrow box shape by a bottom wall portion (32a in FIG. 6B) and a peripheral wall portion 32b provided over the entire circumference of the bottom wall portion 32a. And a cover 33 as a lid formed in a flat plate shape covering the open surface (upper surface) of the case body 32. The cable 6 is pulled out from the end wall portion at the end in the longitudinal direction of the case main body 32 in the peripheral wall portion 32b. A corresponding portion of the peripheral wall portion 32b from which the cable 6 is drawn is provided with an inverted U-shaped insertion hole 35 opened downward to allow the cable 6 to pass therethrough. A portion that defines the upper edge portion of the insertion hole 35 of the peripheral wall portion 32 b is provided as the cable restricting portion 34. The inverted U-shaped width of the insertion hole 35 is substantially the same as the outer diameter of the cable 6, and the vertical distance between the bottom wall portion 32 a and the cable restricting portion 34 is also substantially the same as the outer diameter of the cable 6. Thereby, the insertion hole 35 having substantially the same diameter as the cable 6 is formed when viewed from the insertion direction of the cable 6.

  A clamp housing portion 36 that is formed integrally with the bottom wall portion 32 a is provided inside the case body 32. The clamp housing portion 36 is a portion between the outer end wall portion 36a located on the insertion hole 35 side and the inner end wall portion 36b located on the side opposite to the insertion hole 35 side. Intermediate portions of the both end wall portions 36 a and 36 b are opened in the insertion direction of the cable 6.

  The cable clamp 38 assembled to the clamp housing portion 36 covers the upper half of the cable 6 placed on the bottom wall portion 32a so as to clamp the cable 6 in the radial direction (vertical direction in the drawing) together with the bottom wall portion 32a. A body portion 38a having a shape, a pair of elastic leg pieces 38b extending from the body portion 38a so as to hang down on both sides of the cable 6, and an axial direction of the body portion 38a (a direction sandwiching the pair of elastic leg pieces 38b) It is formed in a shape that integrally has end wall portions 38c and 38d provided at both ends. The length between the both end wall portions 38c and 38d of the cable clamp 38 is substantially the same as the length between the outer end wall portion 36a and the inner end wall portion 36b of the clamp housing portion 36, and is formed at the opening portion of the outer end wall portion 36a. One end wall portion 38c of the cable clamp 38 is fitted, and the other end wall portion 38d of the cable clamp 38 is fitted to the opening portion of the inner end wall portion 36b. Further, the same groove portion 18 as that in the above example is provided on the inner end wall portion 36b side.

  The body portion 38a is provided with an opposing recessed portion 13a having a semi-cylindrical surface shape that is recessed so as to hold the half circumference of the cable 6. The extending ends of the pair of elastic leg pieces 38b are respectively provided with locking claws 38e protruding to opposite sides (outside). An engaging recess 36c that can engage with the locking claw 38e is provided between both end wall portions 36a and 36b of the clamp housing portion 36. In addition, the end wall 38d that is the inner side in the assembled state of the cable clamp 38 is provided with a flange 20 that engages with the groove 18 provided on the inner end wall 36b side, as in the above example. Yes.

  In the terminal box 31 configured as described above, as shown in FIG. 6A, the cable 6 is inserted into the case body 32 from the insertion hole 35 before the cover 33 is assembled to the case body 32. The method for inserting the cable 6 is not limited to the above, and the cable 6 may be drawn from the inside of the case body 32 through the insertion hole 35 to the outside. In these operations, the cable 6 can be easily inserted into the insertion hole 35 because the lower portion of the cable restricting portion 34 is open. Then, the cable clamp 38 is inserted into the clamp housing portion 36 from above, and the latching claw 38e is engaged with the engagement recess 36c by the elastic restoring force of the elastic leg piece 38b. The cable 6 placed in the cable placement portion (not shown) formed integrally with the wall portion 32a is connected to the concave placement portion (not shown) similar to the concave placement portion 12a of the cable placement portion. The cable 6 can be fixed in a state where the cable 6 is held over the entire circumference. Also in this example, the concave portions of the cable placement portion on the bottom wall portion 32a side and the opposing concave portions 13a are provided with the same circumferential protrusions as the circumferential protrusions 21 and 22, respectively. The effect is the same as the above.

  Also in the case of this second example, the flange portion 20 provided on the end wall portion 38d of the cable clamp 38 is engaged with the groove portion 18 on the inner end wall portion 36b side with respect to the drawing direction of the cable 6. It can sufficiently resist the pulling force F of the cable 6. Even the bending deformation of the cable 6 when the bending force M acts can be restricted by the cable restricting portion 34 serving as the edge portion of the upper portion of the insertion hole 35, and the same effect as described above can be obtained. Further, since the cable restricting portion 34 and the cable clamp 38 are separated from each other, even if a bending force M acts on the cable 6 and bending deformation occurs in the cable 6, the deformation range reaches the cable clamp 38. Thus, the cable 6 can be secured by the cable clamp 38 more reliably.

  FIG. 7A is an exploded perspective view of main parts showing a third example, and FIG. 7B is a perspective view corresponding to FIG. 7A showing the main parts in the assembled state of FIG. Although this 3rd example is also an example of the terminal box 41, it is applicable to the terminal box used for a solar cell module similarly to the above. In addition, about the part similar to the above, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  The terminal box 41 in the illustrated example has an L-shaped cross-sectional case main body 42 and an L-shaped cross-sectional cover 43 as a lid that covers the open side of the case main body 42. In the lead-out portion of the cable 6 of the case main body 42, an upright portion 44a erected on the bottom wall portion 42a of the case main body 42, and an arm extending in parallel to the bottom wall portion 42a from the upper end of the erected portion 44a A cable restricting portion 44 formed in an inverted L shape so as to cover from one side portion of the cable 6 to the upper portion is provided by the portion 44b. The lower part of the cable restricting portion 44 is opened as in the second example.

  As described above, since the cable restricting portion 44 is formed in an inverted L shape, when the cable 6 is assembled to the case main body 42, a simple operation of sliding from the open side of the cable restricting portion 44 is sufficient. When the cable 6 is inserted into the insertion hole from the outside of the case main body 42, the soldering operation with the terminal 5 is performed after the insertion of the cable 6. According to this third example, the terminal 5 is soldered to the cable 6. Even after the assembly, the assembling work to the cable restricting portion 44 may be performed, the work process restriction can be eliminated, and the workability can be improved. In each of the above examples, after the terminal 5 is soldered to the cable 6, it may be inserted through the insertion hole from the inside of the body (case body) and pulled out to the outside. Further, the connection between the cable 6 and the terminal 5 is not limited to the above soldering, and there are various connection methods such as welding, spring bonding, and screwing.

  A clamp housing 45 is provided inside the case body 42. The clamp housing portion 45 connects a pair of end wall portions 45a erected on the bottom wall portion 42a at an interval in the insertion direction of the cable 6 and a side opposite to the side wall portion 42b side of the end wall portion 45a. Thus, it consists of the part enclosed by the side wall part 45b standingly arranged by the bottom wall part 42a, and the side wall part 42b standing from the bottom wall part 42a. The pair of end wall portions 45a are provided with U-shaped recessed portions 46 that can hold the lower half of the cable 6 coaxially. Accordingly, when the cable 6 is passed through the clamp housing portion 45, the cable 6 can be dropped into the U-shaped concave portions 46 from above, so that workability is good and positioning is easy.

  The cable clamp of the third example is the same as the cable clamp 38 of the second example, and detailed description thereof is omitted. In addition, engagement recesses (not shown) in which the engaging claws 38e of the elastic leg pieces 38b of the cable clamp 38 can be engaged are provided in the inner side wall portion 45b and the clamp housing portion 45 of the side wall portion 42b. Yes. In addition, each U-shaped recessed part 46 formed in a pair of end wall part 45a respond | corresponds to the recessed part 12a in a 1st example, and the cable clamp 38 is similar to a 2nd example to the clamp accommodating part 45. As a result, the cable 6 can be held between the U-shaped recessed portion 46 and the opposed recessed portion 13a. Further, the U-shaped recessed portion 46 and the opposing recessed portion 13a are provided with the same circumferential protrusion as the circumferential protrusions 21 and 22, respectively, and the operational effects thereof are the same as above (FIG. 8 (a)).

  FIG. 8A is a cross-sectional view of the main part viewed along the axis of the terminal box 41, and FIG. 8B is a cross-sectional view viewed in the arrow direction along the line VIIIb-VIIIb of FIG. . As shown in the figure, the cover 43 has an end wall portion 43a as a shielding portion that is formed so as to surround the pull-out side portion of the cable 6 together with the cable restricting portion 44 in a state assembled to the case main body 42. It is provided integrally. As a result, as shown in FIG. 8B, the open side of the cable restricting portion 44 is closed by the end wall portion 43a, and the end side of the cable 6 of the terminal box 41 is pulled by the end wall portion 43a and the cable restricting portion 44. A wall is formed and an inverted U-shaped opening through which the cable 6 is inserted is formed as in the second example.

  The width of the upright portion 44a and the end wall portion 43a of the cable restricting portion 44 is substantially the same as the outer diameter of the cable 6, and the vertical width that is the distance between the bottom wall portion 42a and the arm portion 44b of the cable restricting portion 44 Is substantially the same as the outer diameter of the cable 6. Thus, the insertion hole 47 having substantially the same cross-sectional area as that of the cable 6 is formed by the inverted U-shaped opening formed by the cable restricting portion 44 and the end wall portion 43a and the bottom wall portion 42a. Has been.

  Also in the case of the third example, the flange portion 20 of the cable clamp 38 can be engaged with the groove portion 18 of the end wall portion 45a in the same way as the second example with respect to the drawing direction of the cable 6. It can sufficiently resist the pulling force F. The bending deformation of the cable 6 when the bending force M acts can also be regulated by the portion that becomes the edge of the upper portion of the insertion hole 47 by the cable regulating portion 44, and the same effect as described above can be achieved. obtain. Further, since the insertion hole 47 and the cable clamp 38 are separated from each other, the same operational effects as those of the second example can be obtained.

  The present invention has been described with reference to the preferred embodiments. However, as those skilled in the art can easily understand, the present invention is not limited to such embodiments, and the gist of the present invention. As long as it does not deviate from the above, it can be appropriately changed. In addition, all the components shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

1 Terminal box 2 Solar cell module 3 Body (main body)
4 Cover (lid)
5 Terminal 6 Cable 7/38 Cable clamp 11 Clamp accommodating part 11a End wall part 12 Cable mounting part 12a Recessed part 13 Trunk part 13a Opposite recessed part 17 Insertion hole 19, 34, 44 Cable restricting part 43 Cover 43a End wall Part (shielding part)
44a Standing portion 44b Arm portion

Claims (5)

A terminal box for holding an intermediate portion of an external connection cable connected to a terminal in a fixed state,
The terminal box has a box-shaped main body that receives the terminal and has an upper surface opened, and a lid that covers the upper surface of the main body.
The main body has a cable restricting portion formed to engage with at least a portion facing the upper surface of the cable extending outward from the main body, and a lower half portion opposite to the upper surface side of the cable. A recessed portion formed in a shape to be held and provided closer to the terminal than the cable restricting portion;
A terminal box comprising an opposing concave portion formed in a shape for sandwiching the cable between the concave portion and a clamp member attached to the main body from the upper surface side.   2. The terminal box according to claim 1, wherein the cable restricting portion is provided on a convex portion protruding from the main body so as to hold the cable in an inserted state.   The cable restricting portion has a standing portion standing on the bottom surface of the main body at one side position of the cable and an arm portion extending from the standing portion to a portion facing the upper surface of the cable. The terminal box according to claim 1, wherein the terminal box is formed.   4. The terminal box according to claim 3, wherein the lid body integrally includes a shielding portion that is formed so as to close an open portion on a side opposite to the standing portion of the cable restriction portion.   The terminal box according to any one of claims 1 to 4, wherein a back surface of the main body opposite to the upper surface of the main body is fixed to an object to be fixed.

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