JP2007018740A - Terminal board device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal board device wherein a screw 13 extracted from a terminal fitting 12 is moved easily and surely, in a direction of separating from the terminal fitting 12, and the moved screw 13 is surely held to a coming-off prevention cover 14. <P>SOLUTION: A male screw part 54 is formed on the head part 52 of each screw 13. Female screw parts 70, for screwing the male screw parts 54 at the head parts 52 of the screws 13 thereto, are formed on the falling preventing cover 14. When the screw 13 is extracted from the terminal fitting 12 by turning it, the male screw part 54 at the head part 52 of the screw 13 is screwed to the female screw part 70 of the falling preventing cover 14, immediately prior to a screw shaft part 53 of the screw 13 being extracted from the terminal fitting 12. By screwing the male screw part 54 at the head part 52 of the screw 13 to the female screw part 70 of the falling preventing cover 14, the screw 13 is moved in a direction of separating from the terminal fitting 12, and the screw 13 is held to the falling preventing cover 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a terminal block device having a terminal fitting and a screw that is detachably screwed to the terminal fitting.

  Conventionally, a terminal fitting is fixed in the terminal block body, and a screw for connecting an electric wire is detachably engaged with the terminal fitting, and the head of the screw can be moved in a direction in which the screw is separated from the terminal fitting. There is a terminal block device in which a moving space is formed and a drop-off prevention cover portion is provided integrally with the terminal block main body so as to cover the periphery and the end of the moving space (see, for example, Patent Document 1).

  During wire connection work, insert a screwdriver tool from the opening formed on the end face of the drop-off prevention cover part, rotate the screw in the direction to loosen it, remove it from the terminal fitting, and further away from the terminal fitting. Move the terminal on the wire side between the terminal fitting and the screw, then move the screw in the direction approaching the terminal fitting, rotate it in the direction to tighten the screw, and move the terminal on the wire side to the terminal fitting Crimped to.

  When using a screwdriver with a magnetic force, rotate the screw in the direction to loosen it, remove it from the terminal fitting, and then move the screw away from the terminal fitting while attracting the magnetic force, The screw head is press-fitted and locked between a plurality of locking parts protruding from the inner surface of the drop-off prevention cover part, so that the wire connection work can be facilitated in a state where the screw is separated from the terminal fitting. .

Also, when using a screwdriver that does not apply magnetic force, turn the screw in the direction to loosen it, remove it from the terminal fitting, and then remove the screwdriver from the opening on the end face of the fall-off prevention cover. By inserting the tool from the opening formed on the side surface of the fall-off prevention cover and engaging with the screw, and moving the screw in a direction away from the terminal fitting, a plurality of locking portions protruding from the inner surface of the fall-off prevention cover portion are obtained. The head of the screw is press-fitted and locked between them, so that the wire connection work can be facilitated with the screw separated from the terminal fitting.
Japanese Patent Laying-Open No. 2005-116318 (Page 6, FIGS. 1 and 5)

  However, in order to move the screw in a direction away from the terminal fitting after rotating it in the direction of loosening the screw to remove it from the terminal fitting, it is necessary to use a screwdriver with a magnetic force. Also, it is difficult to press the screw head firmly between the locking parts and lock it only with the magnetic force of the screwdriver tool, and screw the screw head before locking it between the locking parts. Even if the tool and the screw come off, or the head of the screw can be locked between the locking parts, there is a problem that the tool and the screw are easily removed during the wire connection work.

  Also, when using a screwdriver that does not have a magnetic force and does not have a magnetic force, remove the screw from the terminal fitting, remove the screwdriver from the end face of the drop-off prevention cover, and reinsert it from the side. There is a problem that the operation of moving the inserted screwdriver tool by engaging with the screw is necessary, and the operation becomes complicated. Moreover, even if the head portion of the screw can be pressed and locked between the locking portions, the screw may be removed during the wire connection work because the screw head is only press-fitted between the locking portions.

  The present invention has been made in view of these points, and can easily and reliably move a screw that is detached from a terminal fitting in a direction away from the terminal fitting, and prevents the screw from falling off while the screw is separated from the terminal fitting. It is an object of the present invention to provide a terminal block device that can be securely held by a cover and can improve wiring workability.

  The terminal block device according to claim 1 is a terminal block main body, a terminal fitting attached to the terminal block main body, a screw shaft portion that is detachably screwed to the terminal fitting, and a head that is rotated by a screwdriver. And a screw having a male thread portion provided around the head, and a screw, and a screw that is opposed to the terminal fitting through a moving space formed in a direction in which the head of the screw is separated. And a drop-off prevention cover having a female screw portion into which a male screw portion of a screw head that is detached from the terminal fitting by a moving operation is screwed.

  The terminal block device according to claim 2 is the terminal block device according to claim 1, wherein the drop-off prevention cover includes a pair of cover portions, a hinge portion that connects the pair of cover portions so as to be openable and closable, and the pair of cover portions. In this state, a female screw groove is formed between the pair of cover portions to form a female screw portion, and the pair of cover portions are held by the terminal base body in a closed state.

  The terminal block device according to claim 3 is the terminal block device according to claim 1 or 2, wherein the end surface of the head portion of the screw is inclined with respect to the axial direction, and the outer peripheral direction of the end surface of the head portion extends in the outer diameter direction. A male thread portion is formed by the protruding flange.

  The terminal block device according to claim 4 is a terminal block device according to any one of claims 1 to 3, wherein a head portion of a screw screwed to the drop-off prevention cover is separated from the terminal fitting with respect to the drop-off prevention cover. It is provided with a restricting part that restricts the slippage.

  According to the terminal block device of the first aspect, the male screw portion of the head of the screw removed from the terminal fitting is screwed into the female screw portion of the drop-off prevention cover only by rotating the screw in the direction to remove from the terminal fitting. Therefore, the screw that comes off the terminal fitting can be easily and reliably moved in the direction away from the terminal fitting, and the screw can be securely held in the drop-off prevention cover while being separated from the terminal fitting, improving wiring workability. it can.

  According to the terminal block device of the second aspect, in addition to the effect of the terminal block device of the first aspect, the drop prevention cover is a molded product, and the female screw groove is formed in the pair of cover portions that are connected to be opened and closed by the hinge portion. Since the female screw part can be formed by closing the pair of cover parts and closing the pair of cover parts and combining the female screw grooves of these pair of cover parts, a fall-off prevention cover having the female screw part can be easily manufactured.

  According to the terminal block device according to claim 3, in addition to the effect of the terminal block device according to claim 1 or 2, the end surface of the head of the screw is inclined with respect to the axial direction, and the peripheral edge of the end surface of the head Since the male screw portion is formed by the flange protruding in the outer diameter direction from the portion, the male screw portion can be easily formed on the head of the screw.

  According to the terminal block device of the fourth aspect, in addition to the effects of the terminal block device according to any one of the first to third aspects, the head portion of the screw screwed into the drop-off prevention cover is attached to the drop-off prevention cover. Since the restricting portion restricts the separation from the terminal fitting in the direction away from the terminal fitting, it is possible to prevent the screw detached from the terminal fitting from coming off the drop-off prevention cover.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 4, the terminal block device includes a terminal block main body 11, two sets of terminal fittings 12 and screws 13 incorporated in the terminal block main body 11, and a drop-off prevention cover 14 attached to the terminal block main body 11. I have. In addition, the terminal fitting 12, the screw 13, and the drop-off prevention cover 14 are incorporated from one end of the terminal block main body 11. Hereinafter, the side corresponding to the one end of the terminal block main body 11 is referred to as the terminal block main body 11, the terminal. The description will be made as the upper parts of the metal fitting 12, the screw 13, and the drop-off prevention cover 14.

  The terminal block body 11 is made of synthetic resin having insulation properties, and two terminal fittings for attaching the respective terminal fittings 12 between the end face portions 21 at both ends and the partition portions 22 located between the end face portions 21. A mounting portion 23 is formed.

  A fitting groove 24 is formed at the center of the upper portion of the inner surface of the end surface portion 21 at both ends, and a locking hole 25 that opens to the outer surface of the end surface portion 21 is formed at the lower portion of the fitting groove 24. A notch 26 is formed on the upper side on both sides of the partition 22, and a depression 27 is formed on the upper side of the partition 22 near both sides.

  Each terminal fitting mounting portion 23 is a pair of frame portions 28 formed separately on both sides on the lower side between each end surface portion 21 and the partition portion 22 (only one frame portion 28 is shown in FIG. The other frame portion 28 has a structure shown in FIG. Each frame 28 is formed with a mounting groove 29 for press-fitting and fixing each terminal fitting 12 from above. Opening surfaces of the frame portions 28 that are opposed to each other communicate with the mounting groove portion 29. A terminal portion insertion hole 30 is formed at the bottom of each terminal fitting mounting portion 23.

  Further, the terminal fitting 12 is made of a conductive metal, and a pair of plugs inserted into the mounting groove portions 29 of the terminal fitting mounting portion 23 from both sides of the board portion 42 in which the screw holes 41 into which the screws 13 are screwed are formed. The mounting plate portion 43 is bent. At both ends of these mounting plate portions 43, a plurality of locking projections 44 that protrude into the inner wall of the inserted mounting groove 29 and prevent it from coming off are provided. One mounting plate 43 is formed with a terminal portion 45 projecting downward from the terminal block body 11 through the terminal portion insertion hole 30.

  In addition, the screw 13 has a head 52 formed with a cross-shaped engagement groove 51 to be engaged with a screwdriver tool on the end surface, and a screw shaft portion 53 that is detachably screwed into the screw hole 41 of the terminal fitting 12. is doing. The end surface of the head 52 is formed to be inclined with respect to the axial direction of the screw 13, and a flange protrudes from the substantially half circumferential area of the peripheral portion of the head 52 in the outer diameter direction. A portion 54 is formed.

  A small diameter portion 55 is formed between the screw shaft portion 53 of the screw 13 and the head portion 52, and a washer 56 is engaged with the small diameter portion 55, and between the washer 56 and the head portion 52. A spring washer 57 is engaged.

  Further, as shown in FIGS. 1 to 6, the drop-off prevention cover 14 is made of an insulating synthetic resin and has a pair of cover portions 61. The cover portions 61 are flexible when the pair of cover portions 61 are opened. Are attached to the upper part of the terminal base body 11 in a state where the pair of cover parts 61 are closed by being bent by the plurality of flexible hinge parts 62.

  Each cover portion 61 engages with the notch portion 26 of the partition portion 22 between the end surface portion 21 of the terminal block body 11 and the cover surface portion 63 disposed above the partition portion 22 and the end surface portion 21 of the terminal block body 11. A side surface portion 64 is provided. Locking portions 66 having claw portions 65 at the ends protrude from both ends of the cover portion 61, and the locking portions 66 of the pair of cover portions 61 are arranged side by side with the pair of cover portions 61 closed. These locking portions 66 can be fitted into the fitting grooves 24 of the terminal block body 11 and can be locked in the locking holes 25. On the back surface of the cover surface portion 63 of the cover portion 61, a protrusion 67 is formed that fits into the recessed portion 27 of the partition portion 22 when attached to the terminal block body 11.

  Two pairs of semicircular bosses 68 are juxtaposed at the opposing edges of each cover 61, and a male screw groove 69 of a spiral semicircle is formed inside these bosses 68. . Hinge portions 62 for connecting the pair of cover portions 61 are formed at both upper ends of the boss portions 68, respectively.

  Then, by closing the pair of cover portions 61 via a plurality of hinge portions 62, two sets of boss portions 68 are combined in a cylindrical shape, and a screwdriver tool can be inserted inside each set of boss portions 68. In addition, the spiral of the female screw groove 69 of each set of the boss portions 68 is continuously formed to form the female screw portion 70. Each female screw portion 70 is opposed to the head 52 of each screw 13 screwed to each terminal metal fitting 12 of the terminal block body 11 via the moving space 71, and is a screw that is detached from the terminal metal fitting 12 by the rotation operation of each screw 13. The male threaded portion 54 of the 13 heads 52 can be screwed. The screw shaft portion 53 of the screw 13 can be screwed into the screw hole 41 of the terminal fitting 12 and the male screw portion 54 of the head 52 of the screw 13 can be screwed into the female screw portion 70 simultaneously. The relationship between the screw shaft portion 53 and the male screw portion of 13, the screw hole 41 of the terminal fitting 12, and the female screw portion 70 of the drop-off prevention cover 14 is set.

  As shown in FIGS. 2 to 4, the washer 56 of the screw 13 screwed onto the drop-off prevention cover 14 abuts on the lower surface of each boss portion 68, and the direction away from the terminal fitting 12 with respect to the drop-off prevention cover 14. A restricting portion 72 that restricts the screw 13 from being removed upward is formed.

  In addition, in a state where the drop-off prevention cover 14 is attached to the terminal block body 11, an electric wire is connected from the side between the terminal fitting mounting portion 23 of the terminal block body 11 and the side surface portion 64 of the cover portion 61 of the drop-off prevention cover 14. An opening 81 for insertion and connection is formed.

  Next, the operation of the terminal block device will be described.

  First, in order to assemble the terminal block device, each terminal fitting 12 is attached to each terminal fitting attaching portion 23 of the terminal block main body 11, and screws 13 having washers 56 and 57 are screwed to these terminal fittings 12. The drop-off prevention cover 14 with the pair of cover portions 61 closed is attached to the upper part of the terminal block body 11, and the locking portions 66 at both ends of the drop-off prevention cover 14 are fitted into the fitting grooves 24 at both ends of the terminal block body 11. Together, they are locked in the locking holes 25.

  The drop-off prevention cover 14 assembled to the terminal block body 11 is configured such that the locking portion 66 of each cover portion 61 is fitted in the fitting groove 24 of the terminal block body 11, and the protrusion 67 of each cover portion 61 is the terminal block body. Engagement with the recesses 27 of the eleven partition portions 22 restricts the opening of the pair of cover portions 61.

  Next, in order to connect an electric wire having a round crimp terminal or the like at the tip to the terminal block device, as shown in FIG. 2, when the screw 13 is in a state of being tightened to the terminal fitting 12, use a screwdriver. By engaging with the engagement groove 51 of the head 52 of the screw 13 through the opening inside the boss portion 68 of the drop-off prevention cover 14 and rotating the screw 13 in the loosening direction, the screw shaft portion 53 of the screw 13 and By screwing with the screw hole 41 of the terminal fitting 12, the screw 13 moves to an upper moving space 71 which is a direction away from the terminal fitting 12.

  As shown in FIG. 3, immediately before the screw shaft portion 53 of the screw 13 is removed from the screw hole 41 of the terminal fitting 12, the male screw portion 54 of the head 52 of the screw 13 is screwed into the female screw portion 70 of the drop-off prevention cover 14. . Thereafter, even if the screw shaft portion 53 of the screw 13 is removed from the screw hole 41 of the terminal fitting 12, the screw 13 is screwed by the male screw portion 54 of the head 52 of the screw 13 and the female screw portion 70 of the drop-off prevention cover 14. Moves upward and moves away from the terminal fitting 12.

  As shown in FIG. 4, the screw 13 that moves upward is restricted from coming off with respect to the fall-off prevention cover 14 by the washer 56 coming into contact with the restriction portion 72 of the fall-off prevention cover 14.

  Then, with the screw 13 held in the drop-off prevention cover 14, a round crimp terminal of the electric wire or the like is opened from the opening 81 between the terminal block body 11 and the drop-off prevention cover 14 that opens on the side surface of the terminal block device. It can be inserted between the terminal fitting 12 and the screw shaft portion 53 of the screw 13 and can be easily engaged from the tip end side of the screw shaft portion 53 of the screw 13.

  Thereafter, the screw 13 is turned in the direction in which the screw 13 is tightened with a screwdriver tool, so that the screw 13 is screwed with the male screw portion 54 of the head portion 52 of the screw 13 and the female screw portion 70 of the drop-off prevention cover 14 so that the screw 13 is connected to the terminal fitting 12. Move downwards closer to.

  The screw shaft portion 53 of the screw 13 is screwed into the screw hole 41 of the terminal fitting 12 immediately before the male screw portion 54 of the head 52 of the screw 13 is detached from the female screw portion 70 of the drop-off prevention cover 14. Thereafter, even if the male screw portion 54 of the head 52 of the screw 13 is detached from the female screw portion 70 of the drop-off prevention cover 14, the screw 13 is screwed into the screw shaft portion 53 of the screw 13 and the screw hole 41 of the terminal fitting 12. Moves downward and approaches the terminal fitting 12.

  A round crimp terminal or the like of the electric wire is sandwiched between the terminal fitting 12 with a washer 56 of the screw 13 and tightened.

  As described above, according to the terminal block device, the male screw portion 54 of the head 52 of the screw 13 that is detached from the terminal fitting 12 can be prevented from falling off by simply rotating the screw 13 in the direction away from the terminal fitting 12. Since the screw 13 that is detached from the terminal fitting 12 can be easily and reliably moved in a direction away from the terminal fitting 12, the screw 13 is separated from the terminal fitting 12 to prevent falling off. The cover 14 can be securely held and wiring workability can be improved.

  Further, the drop-off prevention cover 14 is formed as an integral product, the female screw groove 69 is separately formed in a pair of cover portions 61 connected to be opened and closed by a hinge portion 62, and the pair of cover portions 61 is closed to close the pair of cover portions. Since the female threaded portion 70 can be formed by combining the 61 female threaded grooves 69, the drop-off prevention cover 14 having the female threaded portion 70 can be easily manufactured by integral molding without causing an undercut, and the mold structure can also be simplified.

  Further, the end surface of the head 52 of the screw 13 is inclined with respect to the axial direction, and the male screw portion 54 is formed by a flange protruding in the outer diameter direction from the peripheral portion of the end surface of the head 52. The male screw portion 54 can be easily formed on the head 52.

  In addition, since the head 52 of the screw 13 screwed into the dropout prevention cover 14 is prevented from coming off from the terminal fitting 12 with respect to the dropout prevention cover 14 by the restricting portion 72, the head 52 is detached from the terminal fitting 12. It is possible to prevent the screw 13 from being detached from the fall-off prevention cover 14.

  The present invention is provided with a terminal block device provided with a set of terminal block main bodies, terminal fittings, screws and drop-off prevention covers, and two or more sets of terminal block main bodies, terminal fittings, screws and drop-off prevention covers. It can also be applied to terminal block devices.

It is a perspective view of the decomposition | disassembly state of the terminal block apparatus which shows one embodiment of this invention. It is sectional drawing of the state in which the screw of a terminal block apparatus same as the above is screwing in the terminal metal fitting. It is sectional drawing of the state which the screw of a terminal block apparatus same as the above remove | deviates from a terminal metal fitting, and is screwed together to a fall-off prevention cover. It is sectional drawing of the state in which the screw of a terminal block apparatus same as the above is screwing together with the drop-off prevention cover. It is a perspective view of the state which opened the drop-off prevention cover of the terminal block apparatus same as the above. It is a perspective view of the state which closed the drop-off prevention cover of the terminal block apparatus same as the above.

Explanation of symbols

11 Terminal block
12 Terminal bracket
13 Screw
14 Fall prevention cover
52 head
53 Screw shaft
54 Male thread
61 Cover
62 Hinge
69 Female thread groove
70 Female thread
71 Moving space
72 Restrictions

Claims (4)

A terminal block body;
Terminal fittings attached to the terminal block body,
A screw shaft portion that is detachably screwed to the terminal fitting, a head portion that is rotated by a screwdriver, and a screw having a male screw portion provided around the head portion;
A female screw that is opposed to the terminal fitting through a moving space formed in a direction in which the head of the screw is separated, and a male screw portion of a screw head that is detached from the terminal fitting by the turning operation of the screw is screwed. A terminal block device comprising: a drop prevention cover having a portion. The fall prevention cover has a pair of cover portions, a hinge portion that connects the pair of cover portions so as to be openable and closable, and a female screw groove that forms a female screw portion between the pair of cover portions in a state where the pair of cover portions are closed. The terminal block device according to claim 1, wherein the terminal block device is held by the terminal block main body in a state in which the pair of cover portions are closed. The end face of the head of the screw is inclined with respect to the axial direction, and a male screw part is formed by a flange protruding in the outer diameter direction from the peripheral edge of the end face of the head. Terminal block device. The head part of the screw threadedly engaged with the drop-off prevention cover is provided with a restricting portion that restricts the head from coming off from the terminal fitting with respect to the drop-off prevention cover. A terminal block device according to the above.

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