JPH0412617Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Industrial application field) The invention is intended for use in electric wires such as terminal blocks for connecting power wires to fluorescent light fixtures installed in factories, offices, etc. This relates to wiring devices used for connection, especially when wiring is incorrectly connected to the locking terminal.
This invention relates to a wire release mechanism for disconnecting wires for equipment replacement or other reasons.

(Prior Art) Conventionally, for example, the wire release tool has been inserted into a device body that has a pair of wire insertion holes opened on the front surface and a wire release tool insertion hole located near these wire insertion holes and opened on the top surface. A wire release tool is provided so as to be slidable in a direction parallel to the wire insertion hole with a portion of the wire release tool positioned in the hole, and a front surface of the wire release tool insertion hole and a front surface of the wire release tool opposite to this front surface are provided. By inserting a wire release tool, such as a screwdriver, into the gap between the wires and sliding the wire releaser, the pair of locking terminals in the device body to which the power wires inserted from each wire insertion hole are connected are deformed. Terminal blocks are known that have a structure that allows the connection of electric wires to these locked terminals to be released. Conventionally, this type of wiring device, such as a terminal block, has a structure in which the gap between the wire release tool and the side surface of the wire release tool insertion hole into which the screwdriver is inserted faces directly above the wire insertion hole. I was getting used to it.

(Problem to be solved by the invention) However, in the above conventional structure, the wire release tool is connected to the side of the wire release tool insertion hole into which the screwdriver is inserted, directly above the core wire of the power wire connected to the lock terminal. When disconnecting the power wire from the locking terminal, especially if the power wire is still connected to the power source and tilting the screwdriver inserted into the gap, the power source Not only was there a risk of electric shock if a screwdriver touched a live part of the wire, but there was also the risk of a short circuit between the poles.

The present invention aims to solve these problems, and has a simple structure without increasing the size of the device itself.It can prevent electric shocks and short circuits when disconnecting electric wires, and can also prevent electric wires from being disconnected. The purpose of this invention is to provide wiring devices such as terminal blocks that are easy to work with.

[Structure of the idea]

(Means for solving the problem) The wiring device of the present invention has a wire insertion hole and a wire release tool insertion hole located near the wire insertion hole on the outer surface of the device body and the outer surface intersecting this surface, respectively. A locking terminal is opened, faces the wire insertion hole in the device body, and connects an electric wire inserted from the wire insertion hole, and a locking terminal is provided in the device body with a part located in the wire release tool insertion hole. An electric wire release element for disconnecting the electric wire from the locking terminal is provided so as to be slidable in a direction substantially parallel to the electric wire insertion hole, and between the side surface of the electric wire release tool insertion hole and the electric wire release element. forming a gap into which a wire release tool is inserted;
A shielding wall made of an insulator is provided in the device main body located between the gap and the wire insertion hole and along the sliding surface of the wire release element, and a shielding wall is provided between the gap and the wire insertion hole. It is completely insulated.

(Function) In the wiring device of the present invention, when disconnecting an electric wire that has been inserted through the electric wire insertion hole and locked and connected to the locking terminal, there is a gap between the side surface of the electric wire release tool insertion hole and the electric wire disconnector. Insert a wire disconnection tool such as a screwdriver into the gap and slide the wire disconnector, but at this time, the tip of the wire disconnection tool will not touch the shielding wall located between the gap and the wire insertion hole. Upon abutment, the wire disconnection tool is regulated to a position suitable for sliding the wire releaser, and the wire disconnection tool is prevented from coming into contact with the wire in the wire insertion hole.

(Embodiment) Hereinafter, the configuration of an embodiment of the wiring device of the present invention will be described based on drawings of a terminal block.

Reference numeral 1 denotes a terminal block body serving as the device body, which is formed into a substantially flat rectangular parallelepiped shape. The terminal block main body 1 includes a substantially box-shaped base body 2 with an open top surface, a first cover body 3 attached to the upper front part of the base body 2, and a first cover body 3 attached to the upper rear part of the base body 2. The base body 2 and both cover bodies 3 and 4 are both molded from an insulating material such as synthetic resin.

Inside the terminal block main body 1, a pair of left and right terminal chambers 6 are defined by a guide wall 5 formed on the base body 2 and extending in the front-rear direction. and,
Facing each of these terminal rooms 6, the terminal block main body 1
A pair of left and right internal wiring wire insertion holes (not shown) that open on the rear surface and a left and right pair of power wire insertion holes 8 that open on the front surface of the terminal block body 1 are connected to the base body 2, both cover bodies 3, 4, respectively.

Furthermore, locking terminals 11 are installed in both terminal chambers 6, respectively. These locking terminals 11
each has a connecting hole 12 at the rear and a contact piece 1.
3 on both left and right sides of the front portion, and a leaf spring 15 made of an elastic conductor and fitted between the contact pieces 13 of the terminal plate 14. These leaf springs 15 have a holding piece 16 bent at the rear facing the power wire insertion hole 8, and a locking piece 17 bent at the front. . Both of the holding piece part 16 and the locking piece part 17 have their tips in contact with the inner contact piece 13 of the terminal board 14 or are opposed to each other with a small gap between them, and also move toward the tip and toward the rear, i.e. It is inclined in the direction away from the wire insertion hole 8. Note that the tip of the presser piece 16 is folded back into a V-shape.

Further, a rectangular electric wire release tool insertion hole 21 is formed in the front part of the upper surface of the first cover body 3 and is located near the upper side of the power wire insertion hole 8 . A peephole 22 connected to the rear side is formed. The insertion hole 21 is located on the front lower side of the wire release tool insertion hole 21.
A shielding wall 23 is formed that blocks the front upper side of the base body 2 from the power wire insertion hole 8, and the upper surface of this shielding wall 23 is connected to the upper surface of the guide wall 5 of the base body 2.

Reference numeral 26 denotes a wire release element, which is made of an insulator such as transparent synthetic resin. The wire release element 26 has a groove 27 formed on its lower surface that is fitted into the guide wall 5 so that the power wire insertion hole 8
The first cover body 3 is supported so as to be slidable in a direction parallel to the first cover body 3, and its both side edges are brought into contact with the first cover body 3 from below to prevent it from coming off. Further, an operating portion 28 is formed projecting from the upper front portion of the wire release element 26, and this operating portion 28 is located within the wire release tool insertion hole 21. A gap 29 is formed between the front side of the insertion hole 21 and the front side of the operating section 28, and the lower end of this gap 29 is closed by the shielding wall 23 of the first cover body 3. Note that a sloped portion 30 is formed at the lower front surface of the operating portion 28 . Further, the guide walls 5 are provided on both left and right sides of the lower part of the wire release element 26.
A pressing surface 31 is formed on the locking piece portion 17 of the leaf spring 15 of the locking terminal 11, which is inclined backward toward the locking terminal 11 and pressed from the front.

Next, the operation of the above embodiment will be explained.

In the wiring work, the core wire of an electric wire (not shown) for internal wiring of a fluorescent lamp or the like is inserted into the connection hole 12 of the terminal board 14 and soldered.

Further, the tip of a single wire power wire (not shown) from which the sheath has been removed is inserted into the power wire insertion hole 8 . Then, the core wire of the power wire is inserted between the contact piece 13 of the terminal board 14 and the locking piece 17 and the holding piece 16 of the leaf spring 15, and the locking piece 17 bites into the wire and the power wire is closed. The power supply wire is held by the contact piece 13, and the holding piece 16 presses the core wire against the contact piece 13. In this way, the internal wiring wire and the power supply wire are electrically connected.

After connecting the wire to the locking terminal 11, when disconnecting the wire due to incorrect wiring, replacement of a device, or other reasons, use a wire release tool such as a flat head screwdriver on the front side of the wire release tool insertion hole 21. and the wire release element 26, and slide the wire release element 26 backward. Then, the pressing surface 31 of the wire release element 26 is pressed from the front by the locking piece 17 of the leaf spring 15, and the locking piece 17 is elastically deformed and separated from the power wire, thereby connecting the wire to the locked state. is released, so you can pull out the wire in this state.

At this time, a first
Even if the tip of the screwdriver hits a shielding wall 23 formed in the cover body 3 and there is a part where the core wire of the power supply wire is exposed in the wire insertion hole 8, the driver is not allowed to touch the core wire. Therefore, there is no risk of electric shock or short circuit. In addition, the position of the tip of the screwdriver is regulated by the shielding wall 23 and the driver cannot go below the shielding wall 23, so there is no need to push the screwdriver in too much or not enough. It is possible to prevent variations among workers during the disconnection work, and it is possible to perform the stable disconnection work of wire connections.

Further, according to the above configuration, in the conventional terminal block, the shielding wall 2 integrated with the first cover body 3 is provided between the gap 29 into which the driver is inserted and the power wire insertion hole 8.
3, the structure is simple and inexpensive, and the provision of a mechanism to prevent electric shock and short circuit prevents the terminal block from becoming bulky as a whole.

Note that although the terminal block has been described in the above embodiment, the present invention is not limited to the terminal block, but can be applied to various wiring devices for connecting electric wires.

Further, in the above embodiment, a pair of locking terminals 11 are provided, but in the case of a wiring device that electrically connects a power source and a load, for example, an outlet, a pair of locking terminals 11 is provided on the device body corresponding to each pair of electric wires on the power source side and the load side. Two pairs of electric wire insertion holes and two pairs of locking terminals may be provided.
Further, for example, if there are two or more loads connected to the power source in a branched manner, three or four or more pairs of locking terminals may be provided. The present invention can be applied to any of these cases.

[Effect of idea]

According to the present invention, a shielding wall made of an insulator is provided between the side surface of the wire release tool insertion hole and the gap between the wire release elements and the wire insertion hole located near this gap. When the wire release tool is inserted into the gap to release the connection of the wire to the lock terminal, the wire release tool is securely contacted with the wire by the shielding wall, without increasing the size of the device body. Therefore, electric shock and short circuit between electrodes can be prevented. Furthermore, since the position of the tip of the wire release tool is restricted when it hits the shielding wall, the wire release element can also be slid reliably, and the work of disconnecting the wire can be performed smoothly.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the wiring device of the present invention, Fig. 2 is a partially cutaway plan view of the same, Fig. 3 is a plan view of the same, and Fig. 4 is a wire release element and chain of the same. It is a back view showing the relationship with a lock terminal. DESCRIPTION OF SYMBOLS 1...Terminal block body serving as the device body, 8...Wire insertion hole, 11...Lock terminal, 21...Wire release tool insertion hole, 23...Shielding wall, 26...Wire release element,
29...Gap.

Claims (1)

[Scope of Claim for Utility Model Registration] A device body having a wire insertion hole opened on the outer surface and a wire release tool insertion hole opened on the outer surface that intersects with this surface and located near the wire insertion hole, and inside the device body. a locking terminal that is provided facing the wire insertion hole and connects the wire inserted through the wire insertion hole; and a locking terminal that is partially located in the wire release tool insertion hole and connected to the wire insertion hole in the device body. an electric wire release element that is slidably provided in a substantially parallel direction and forms a gap between the electric wire release tool and the side surface of the electric wire release tool insertion hole to release the electric wire from the locking terminal; an insulator located between the electric wire insertion hole and the gap between the side surfaces of the electric wire release element and the electric wire release tool insertion hole and along the sliding surface of the electric wire release element; A wiring device characterized by having a shielding wall.