JP2017092015A - Terminal block device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal block device in which a connection terminal is never removed from the terminal block body, by preventing a terminal screw for attaching the connection terminal provided at the end of wiring from loosening.SOLUTION: In a terminal block body 1 made of insulated plastic and attaching a connection terminal 5 at the end of a wiring by means of a terminal screw 6, a protrusion 15 engaging with the groove 7a of a driver tool, provided in the head 7 of the terminal screw 6, is formed in the lower surface of a regulation plate 12 having a width same as the interval of a pair of left and right sidewalls 3 projecting from the base 2 of the terminal block body 1, and the regulation plate 12 is inserted between the sidewalls 3 and the protrusion 15 is engaged with the groove 7a of a driver tool, provided in the head 7 of the terminal screw 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a terminal block device for attaching a connection terminal provided at an end of a wiring.

  Conventionally, many devices using washers have been proposed to prevent terminal screws from loosening. Generally, a washer is used as a spring washer, or a protrusion formed by cutting on each of the upper and lower surfaces of the washer is engaged with a screw hole and a screw head to prevent loosening of the screw as in Patent Document 1. There is.

JP 2006-3000299 A

  In particular, in the case of using a spring washer, if the spring property is used to prevent loosening, the spring will sag when used for a long period of time, and the function of preventing loosening by the spring force will not be achieved. In addition, in the case of Patent Document 1, a screw hole or a recess for locking the washer protrusion is provided in the screw head, and this recess needs to be processed, and the assembly is troublesome. there were.

  The present invention has been made in consideration of the above, and it is possible to reliably prevent loosening by a simple structure without special processing of the screw hole of the terminal screw, and to tighten the terminal screw. The purpose is to facilitate assembly work regardless of the completion position.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

  The invention according to claim 1 is a terminal block body made of insulating plastic for attaching the connection terminal at the end of the wiring with a terminal screw, and has the same distance as the pair of left and right side walls protruding from the base of the terminal block body. A protrusion engaging with a screwdriver tool groove provided on the head of the terminal screw is formed on the back surface of the restriction plate having a width, and the protrusion is inserted between the side walls by inserting the restriction plate into the terminal screw. The terminal block device is engaged with the screwdriver tool groove of the head.

  According to a second aspect of the present invention, a non-circular opening is formed in the restriction plate so as to face the head of the terminal screw, and the screwdriver tool has an outer shape having the same shape as the opening. 2. The terminal block device according to claim 1, wherein a piece member formed with a protrusion that engages with the groove is fitted into the opening, and the protrusion is engaged with the screw tool groove.

  According to a third aspect of the present invention, an outer peripheral serration is formed on the outer periphery of the piece member, an inner peripheral serration that matches the outer peripheral serration of the piece member is formed on the inner periphery of the opening of the restriction plate, and the opening The terminal block device according to claim 2, wherein the piece members are fitted to each other so as to be serrated.

  With the above configuration, the present invention has the following effects.

  According to the first aspect of the present invention, there is provided a terminal block body made of insulating plastic to which connection terminals at the ends of the wiring are attached by terminal screws, the same as the distance between the pair of left and right side walls protruding from the base of the terminal block body. A protrusion engaging with a screwdriver tool groove provided on the head of the terminal screw is formed on the lower surface of the restricting plate having a width, and the restricting plate is inserted between the side walls to insert the protrusion into the terminal screw. Since it is engaged with the groove for the screwdriver tool of the head of the head, it is ensured that the terminal screw for attaching the connection terminal is loosened by vibration or the like without modifying the shape of the terminal block body and the terminal screw. It is possible to prevent the connection terminal from being detached from the terminal block body, and to reduce the cost for preventing the loosening.

  According to a second aspect of the present invention, a non-circular opening is formed in the restricting plate so as to face the head of the terminal screw, the outer shape has the same shape as the opening, and the screwdriver tool is provided on the lower surface. A piece member formed with a protrusion that engages with the groove is fitted into the opening, and the protrusion is engaged with the screwing tool groove, so that the screwing tool is passed through the opening of the restriction plate, The terminal screw can be easily tightened by engaging this with the screw turning tool groove on the head of the terminal screw, and the connection terminal is securely attached to the base.

  According to a third aspect of the present invention, an outer peripheral serration is formed on the outer periphery of the piece member, an inner peripheral serration that matches the outer peripheral serration of the piece member is formed on the inner periphery of the opening of the restriction plate, and the opening The piece member is fitted so as to be serrated and connected to the inner peripheral serration of the opening of the restricting plate by only slightly turning the piece member regardless of the tightening completion position of the terminal screw. The peripheral serration of the piece member can be quickly fitted, the assembly of the restriction plate and the terminal screw is simple, and the loosening of the terminal screw can be reliably prevented.

1 is a secondary sectional view showing a terminal block device according to a first embodiment of the present invention. It is a top view of the terminal block apparatus in FIG. It is sectional drawing by the AA line of FIG. It is a perspective view which shows the control board of 1st Embodiment of this invention. It is a perspective view which shows the piece member of 1st Embodiment of this invention. It is sectional drawing which shows the terminal block apparatus of 2nd Embodiment of this invention. It is a perspective view which shows the piece member of 2nd Embodiment of this invention. It is sectional drawing which shows the terminal block apparatus of 3rd Embodiment of this invention.

  Embodiments of the terminal block device of the present invention will be described below. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an example in which a terminal block device is implemented, and what is denoted by reference numeral 1 is a terminal block main body.

  The terminal block main body 1 is made of insulating plastic, and includes a base 2 and a pair of left and right side walls 3 and 3 erected from the base 2, and the connection terminal 5 at the end of the wiring is connected by the terminal screw 6. It is attached to the base 2. A pair of the terminal screws 6 are arranged in the longitudinal direction of the terminal block body 1, and the terminal screws 6 are partitioned by the partition 4.

  On the upper surface of the head portion 7 of the terminal screw 6, a cross-shaped screwdriver tool groove 7 a that can be used as a plus screwdriver tool (not shown) and a minus screwdriver tool (not shown) is formed. On the lower surface of the portion 7, there is a screw portion 8 that is screwed into the base 2 of the terminal block body 1.

  The connection terminal 5 is pressed and held between the floor plate 9 on the base 2 and the pressing plate 10 on the lower surface of the head 7 by screwing the screw portion 8. For this reason, usually, when the screw portion 8 is rotated by vibration or the like and the terminal screw 6 is loosened, the connection terminal 5 is detached from the base 2. Reference numeral 11 denotes a washer interposed on the lower surface of the head 7.

  A plastic or sheet metal regulating plate 12 having a width substantially the same as the interval between the side walls 3 and 3 is inserted between the side walls 3 and 3. The restriction plate 12 is formed with an opening 13 having the same shape as or slightly larger than the head 7 facing the head 7 of the terminal screw 6, and an inner peripheral serration on the inner peripheral surface of the opening 13. 13a is formed to make the opening 13 non-circular.

  A piece member 14 having the same outer shape as the opening 13 is fitted into the opening 13 of the regulating plate 12. An outer peripheral serration 14 a that matches the inner peripheral serration 13 a of the opening 13 is formed on the outer periphery of the piece member 14. This outer peripheral serration 14a may be formed in several places around the periphery.

  The lower surface 14b of the piece member 14 is provided with a projection 15 that fits into the screwing tool groove 7a of the head 7 of the terminal screw 6, and the piece member 14 is fitted into the opening 13 to thereby The protrusion 15 is engaged with the screw turning tool groove 7a.

  Further, a graphic 16 having the same shape as the projection 15 is displayed on the upper surface 14c of the piece member 14 so that the orientation of the projection 15 can be known. In addition, you may make the said groove 7a for screwdriver tools into the shape of a single character, square shape, and hexagon.

  The protrusion 15 that fits into the screw turning tool groove 7 a of the head 7 of the terminal screw 6 is provided on the piece member 14 that fits into the opening 13 of the restriction plate 12. It may be provided integrally on the lower surface of the plate 12.

  In this terminal block device, first, after the restriction plate 12 is inserted between the side walls 3, 3, the screwing tool is passed through the opening 13 of the restriction plate 12, and this is passed through the head of the terminal screw 5. The connection terminal 4 is attached to the base 2 by tightening the terminal screw 5 and engaging with the screw-turning tool groove 7 a of the portion 6.

  Next, while visually checking the figure 16 on the upper surface 14 c of the piece member 14, the projection 15 of the piece member 14 is engaged with the screw tool groove 7 a of the head 7 of the terminal screw 6. . Then, the outer peripheral serration 14 a of the piece member 14 is matched with the inner peripheral serration 13 a of the opening 13, and the piece member 14 is fitted into the opening 13.

  Thus, even if the said screw part 8 begins to rotate because the said protrusion 15 engages with the said screwing tool groove | channel 7a, the end surface of the said control board 12 contact | abuts to the said side walls 3 and 3, and the said screw part 8 is prevented from loosening the terminal screw 6.

  Since the piece member 14 is fitted into the opening 13 of the restriction plate 12 by serration coupling, the restriction plate 12 can be turned only by slightly rotating the piece member 14 regardless of the tightening completion position of the terminal screw 6. The outer peripheral serration 14a of the piece member 14 can be quickly fitted into the inner peripheral serration 13a of the opening 13, and the assembly of the restriction plate 12 and the terminal screw 6 is simple, and the terminal screw is surely loosened. Can be prevented.

  Next, a second embodiment will be described based on FIG. 6 and FIG. In this embodiment, the same components as those in the first embodiment will be described with the same reference numerals.

  In the second embodiment, a cylindrical guide portion 17 is protruded from the lower surface 14b of the piece member 14 that fits into the opening 13 of the restriction plate 12 described in the first embodiment.

  As in the first embodiment, the lower end of the guide portion 17 is provided with the protrusion 15 that fits into the screw driver groove 7a of the head 7 of the terminal screw 6, and this protrusion 15 is connected to the screw Engage with the turning tool groove 7a.

  By providing the guide portion 17, when the piece member 14 is fitted into the opening 13 of the restriction plate 12, the piece member 14 is rotated clockwise or counterclockwise with the guide portion 17 fitted in the opening 13. The terminal screw 6 can be smoothly rotated slightly and the figure 16 on the upper surface of the head 7 of the terminal screw 6 can be easily matched with the screw turning tool groove 7a of the head 7 of the terminal screw 6. Become.

  Further, a third embodiment will be described with reference to FIG. In this embodiment, the same components as those in the first embodiment will be described with the same reference numerals.

  In the third embodiment, a lid 18 is detachably attached to the tips of the pair of left and right side walls 3 protruding from the base 2 of the terminal block body 1 described in the first embodiment.

  A convex portion 19 is provided on the back surface of the lid 18, and the convex portion 19 abuts against the piece member 14 or the restriction plate 12 when the lid 18 is attached to the tip of the side walls 3, 3, and the terminal block body Even if the installation posture of 1 is inclined, the protrusion 15 does not come off from the screw turning tool groove 7a of the head portion 7 of the terminal screw 6, and the restricting plate 12 prevents the terminal screw 6 from loosening. Stop without fail.

  In the terminal block device having the above configuration, the connection terminal 5 is sandwiched between the floor plate 9 on the base 2 and the pressing plate 10 below the seating surface 7b, and the terminal screw 6 is grooved for the screwing tool. The screw portion 8 of the terminal screw 6 is screwed into the base 2 by a screwdriver tool engaged with 7a, thereby fastening the terminal screw 6 and attaching the connection terminal 5 to the base 2.

  Tightening of the terminal screw 6 is completed, and the restriction plate 12 is inserted between the side walls 3 and 3 at this completion position, and the piece member 14 is fitted into the opening 13 of the restriction plate 12. At this time, even if the restriction plate 11 is inserted between the side walls 3 and 3 regardless of the tightening completion position of the terminal screw 6, the piece member 14 that fits into the opening 13 of the restriction plate 12 can be used. The protrusion 15 can be fitted into the screw-turning tool groove 7 a of the head 7 of the terminal screw 6.

  Even if the vibration of the equipment including the terminal block device is transmitted to the terminal block main body 1 and the terminal screw 6 to which the connection terminal 5 is attached is rotated, the protrusion 15 of the piece member 14 is in contact with the head of the terminal screw 6. The end face of the restricting plate 12 is abutted against the side walls 3 and 3 and is prevented from rotating, the terminal screw 6 is not loosened, and the connection terminal 5 is connected to the terminal block body 1. It will not come off from the base 2.

  The present invention is a terminal block device that reliably prevents a terminal screw for attaching a connection terminal provided at an end of a wiring from loosening due to vibration and the like so that the connection terminal does not come off from the terminal block main body.

DESCRIPTION OF SYMBOLS 1 Terminal block main body 2 Base 3 Side wall 4 Bulkhead 5 Connection terminal 6 Terminal screw 7 Head 7a Groove for screwdriver tool 8 Screw part 9 Base plate 10 Push plate 11 Washer 12 Restriction plate 13 Opening 13a Inner peripheral serration 14 Piece member 14a Outer periphery Serration 14b Lower surface 14c Upper surface 15 Protrusion 16 Symbol 17 Guide portion 18 Lid 19 Convex portion

Claims (3)

  A terminal block body made of insulating plastic that attaches the connection terminal at the end of the wiring with a terminal screw, on the back surface of the regulation plate having the same width as the interval between the pair of left and right side walls protruding from the base of the terminal block body, A protrusion that engages with a screwdriver tool groove provided on the head of the terminal screw is formed, the restriction plate is inserted between the side walls, and the protrusion is inserted into the screwdriver tool of the head of the terminal screw. A terminal block device characterized by being engaged with a groove for use.   A non-circular opening is formed in the restricting plate so as to face the head of the terminal screw, and an outer shape having the same shape as the opening is formed, and a protrusion engaging with the screw turning tool groove is formed on the lower surface. The terminal block device according to claim 1, wherein the piece member is fitted into the opening and the protrusion is engaged with the screw tool groove.   An outer peripheral serration is formed on the outer periphery of the piece member, an inner peripheral serration that matches the outer peripheral serration of the piece member is formed on the inner periphery of the opening of the restriction plate, and the piece member is serrated and connected to the opening. The terminal block device according to claim 2, wherein the terminal block device is fitted to the terminal block device.

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