JP2014067601A - Terminal block device of programmable logic controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widen a contact area with a conducting wire in order to connect an insulation-coated wire.SOLUTION: A connection terminal 12 is structured which is capable of expansion and contraction deformation by having a bent part 12a and two plate-like piece parts 12b and 12c. On the surface opposite to a wire receiving part 6b in a moving body 11, the connection terminal 12 is provided in a state where the bent part 12a is positioned correspondingly to a virtual center line P dividing the lateral width of the moving body 11 into two portions, and the respective piece parts 12b and 12c are allocated on both sides of the virtual center line P. The connection terminal 12 has a blade 13 capable of cutting an insulation coating 20b at the end of the wire receiving part 6b side. The blade 13 of the connection terminal 12 is made to come into contact with a conducting wire 20a group by cutting the insulation coating 20b of an insulation coating wire 20 and intruding into the conducting wire 20a group by movement of the moving body 11.

Description

  The present invention relates to a terminal block device of a programmable logic controller.

The programmable logic controller is equipped with a terminal block. The terminal block is supplied with power wires, wires for inputting signals from various sensors and switches to the input unit, and control signals from the output unit are output to solenoid valves and motors. Connect the wires to make it.
As the electric wire, an insulation-coated electric wire, for example, a vinyl insulation-coated electric wire is usually used. When connecting this insulation-coated wire to the terminal block, the insulation coating at the tip is peeled off to expose the internal conductor group for a desired length, and the exposed conductor group is tightened to the terminal of the terminal block with a screw. As a result, the insulated coated electric wire is electrically connected to the terminal block and is also mechanically fixed.

  However, since the work of stripping the insulation coating takes time, it has been proposed to enable terminal connection without stripping the coating. For example, Patent Document 1 discloses a press contact terminal in which a U-shaped slot is formed in a plate-like terminal, and a pair of press contact blades are formed at opposite ends of the open portion of the slot. In this case, the gap between the pair of press contact blades is formed in an inverted C shape that gradually narrows toward the back of the slot, and when the insulation covered electric wire is pushed between the press contact blades, the insulation cover is first cut by the press contact blades. Thereafter, both ends (edges corresponding to the plate thickness) of the slot enter the electric wire through the cut portion of the insulating coating, and are brought into pressure contact with the outer surface of the conductor.

  According to the configuration of Patent Document 1, since the inner surface of the slot comes into contact with the outer surface of the conductor group from the cut portion formed in the insulating coating by the press contact blade, the press contact terminal and the insulated coated electric wire can be used without removing the insulating coating. The lead wire can be electrically connected.

JP 2003-45510 A

In the configuration of Patent Document 1 described above, the contact area between the press contact terminal and the lead wire is small because it is only in contact with the outside of the conductor group at the edge having only a very thin plate thickness in the slot of the press contact terminal. When the contact resistance between the press contact terminal and the conductive wire increases and a large current flows, the degree of heat generation of the electric wire increases. A control device such as a programmable logic controller dislikes temperature rise, so it is difficult to adopt the configuration of Patent Document 1 that tends to generate heat.
The present invention has been made in view of the above circumstances, and its purpose is to widen the contact area with the conductor group while adopting a configuration in which the insulation coating of the insulation-coated electric wire is cut with a blade and brought into contact with the inner conductor group. Another object of the present invention is to provide a terminal block device for a programmable logic controller.

  According to the terminal block device of the programmable logic controller of claim 1, the V-shaped connection terminal is pressed against the insulation-coated electric wire by the movement of the moving body, and the blade of the connection terminal cuts the insulation coating of the insulation-coated electric wire to conduct the wire. It penetrates into the group and comes into contact with the conductor group. Thereby, it is possible to easily connect the connection terminal and the conductive wire group of the insulation-coated electric wire only by moving the moving body in the direction of the electric wire receiving portion. Moreover, since the connection terminal further penetrates into the conductor group after cutting the insulating film, not only the blade part of the connection terminal but also both surfaces of the plate-like piece of the intrusion part come into contact with the conductor group. Moreover, by making the connection terminal into two V-shaped pieces, it is possible to further increase the contact area with respect to the conductor group as compared with the case where only one piece is used. As a result, the contact area can be increased as compared with the conventional case where both edges in the slot of the press contact terminal are in contact with only the outside of the conductor group, thereby reducing the contact resistance and reducing the heat generation.

  Here, the programmable logic controller is appropriately installed at various installation locations such as a factory floor, an installation shelf, an installation table, or a wall of the factory building. For this reason, the programmable logic controller is connected to the programmable logic controller. Insulation-coated electric wires are often wired to other devices in the form of a hanging part. The wiring length to other devices is usually as short as 40 to 50 cm, but as an extremely rare case, this wiring length may be as long as 2 m or more depending on the equipment layout in the factory. .

  Moreover, after the connection of the above-described insulation-coated wires and the wiring between devices, the programmable logic controller and each device are operated over a long period of time in the wiring state. If the length is long, the self-weight acts as a downward pulling force (extraction force) continuously over a long period of time, and there is a concern that the insulation covered electric wire may come off at the connecting portion.

In this case, with the above-described conventional configuration, the slot-shaped press contact terminals only sandwich both sides of the conductor group of the insulated wire, so that when the pulling force acts on the insulated wire, the conductor group is pressed. It slides with respect to the terminal, and the flexible insulation coating cannot support the entire weight of the insulation-coated electric wire, and the insulation-coated electric wire comes out of the connection portion.
In this regard, according to claim 1, since the piece of the connection terminal penetrates into the rigid conductor group, the conductor group that is rigid can be supported by the entire penetration region in the piece of the connection terminal. The movement of the conductor group can be prevented, so that the insulation-coated electric wire can be made difficult to come off.

Further, the V-shaped connection terminal can be enlarged / reduced and deformed around the bent portion, and the connection terminal is divided into two in the width of the movable body on the surface facing the wire receiving portion of the movable body. The bent portion is located on the virtual center line, and each piece is arranged on both sides of the virtual center line. As this arrangement form, the following arrangement form (a) and (b) are included, but in any arrangement form, as described below, the insulation-coated electric wire can be further prevented from being pulled out.
As described above, in the arrangement form in which the bent portion is located on the virtual center line and each piece is distributed on both sides of the virtual center line, the orientation of the connection terminal in the electric wire arrangement portion is as follows: In some cases, the V-shaped open side of the connection terminal faces the wire insertion port of the electric wire arrangement part, and (b) the bending part side may face the electric wire insertion port of the electric wire arrangement part.

  In the case of the former (a) arrangement form (form in which the V-shaped open end of the connection terminal is on the wire insertion port side and the bent part is on the anti-wire insertion port side) When the is applied, the pulling force of the lead wire group that is remarkably rigid as compared with the insulating coating acts on the bent portion located in the lead wire group portion. For this reason, the bending part which receives exclusively extraction force expands the both ends of the V-shaped opening side located in the electric wire insertion port side rather than this bending part. Due to this expansion, the two pieces will bite into the insulated wire, making it even more difficult to remove the insulated wire.

  In the case of the latter (b) arrangement (in which the bent portion of the connection terminal is on the side of the wire insertion port and the end of the V-shaped open side is on the side opposite to the electric wire insertion port) The bending portion that receives the pulling force from the conductive wire group exerts a force in a direction to close both ends of the V-shaped opening side located on the side opposite to the electric wire insertion port. That is, since the two pieces receive a force in the direction of closing and contracting, the two insulated wires grip the insulated wire portion between the two pieces. As a result, in this case as well, it is possible to make it difficult to pull out the insulated coated wire.

  Here, the inventor considered whether there is a method for detecting the sign before the insulation-coated electric wire comes out. Therefore, attention is focused on the above-described connection terminal expansion event. That is, in the case of the arrangement form (a) described above, that is, the arrangement form in which the end of the V-shaped open side of the connection terminal is on the wire insertion port side and the bent part is on the side opposite to the electric wire insertion port, When the pulling force acts on the electric wire, the both ends of the V-shaped opening side are displaced in the expanding direction. If this displacement can be visually recognized, it is possible to detect an indication that the insulation-coated electric wire is likely to come off.

  In claim 2, which focuses on this point, the connection terminal is arranged in such a manner that the end of the V-shaped opening side faces the electric wire insertion port of the electric wire arrangement part, and of the two pieces of the connection terminal One is configured to extend longer than the other. According to this, when a pulling force is applied to the insulation-coated electric wire, the end of the V-shaped opening side is displaced in the expanding direction. In this case, the degree of displacement of the longer end of the two pieces is large, and by visually recognizing this, it is possible to detect a situation where the insulation-covered electric wire is about to come off.

Moreover, in Claim 3, the said electric wire arrangement | positioning part is arranged in multiple numbers, and the said mobile body and the said connection terminal are provided in each electric wire arrangement | positioning part, The said one of the two pieces of each said connection terminal One (longer side) was made into the arrangement | positioning form which becomes the same direction in each electric wire arrangement | positioning part.
In the configuration in which a plurality of electric wire arrangement portions are arranged side by side and the moving body and the connection terminal are provided in each electric wire arrangement portion, the longer one portion of any specific connection terminal is temporarily connected to the other connection terminal. If it is in a direction different from the longer one, when the specific connecting terminal and another connecting terminal adjacent to it are expanded and deformed, the longer one approaches each other, which may cause a short circuit. is there.

  On the other hand, according to the third aspect, in the configuration in which a plurality of electric wire arrangement portions are arranged side by side and each of the electric wire arrangement portions is provided with the movable body and the connection terminal, two pieces of the connection terminals are provided. Since one of the parts (the longer one) is arranged in the same orientation in each wire arrangement part, even if adjacent connection terminals are expanded and deformed, the longer one part is in an approaching state. Therefore, there is no possibility that the longer one of the adjacent connection terminals is short-circuited.

The perspective view of the programmable logic controller incorporating the terminal block apparatus by 1st Embodiment. Partial cross-sectional bottom view of terminal block device Longitudinal side view of terminal block device Perspective view of connection terminal Perspective view of moving body and connection terminal part Sectional drawing in the cutting line VV of FIG. Disassembled perspective view of moving body and connection terminal Fig. 2 equivalent diagram showing the connection with the insulated wire It is sectional drawing by cutting line BB in FIG. 8, (a) is a figure which shows the state immediately after insulation coating electric wire insertion, (b) is a figure which shows the state which the insulation coating electric wire moved to the removal direction. Fig. 3 equivalent diagram showing the connection with the insulated wire FIG. 9 equivalent diagram according to the second embodiment FIG. 9A equivalent view according to the third embodiment. Fig. 9 (b) equivalent diagram FIG. 8 equivalent view according to another embodiment 12 equivalent diagram showing a reference example Figure 13 equivalent

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, a programmable logic controller 1 is installed on, for example, a wall or a shelf (not shown) of a factory or the like, and a terminal block device 2 is incorporated on the front surface of the programmable logic controller 1. The terminal block device 2 includes a device body 3.
As shown in FIGS. 2 and 3, the apparatus body 3 includes a body case 4 made of, for example, a synthetic resin and a lid body 5 made of, for example, a synthetic resin. The main body case 4 has a main plate portion 4a and a large number of partition wall portions 4b that rise from the main plate portion 4a at a substantially right angle. The front side of each main body case 4 (the front end side of each partition wall portion 4b) is closed by a lid body 5, and each space portion surrounded by the lid body 5, the main plate portion 4a of the main body case 4 and the partition wall portion 4b. Is the electric wire arrangement part 6. As shown in FIG. 2, the inner width dimension h of the electric wire arrangement portion 6 is set to be slightly larger than the width dimension K of the insulation-coated electric wire 20 described later.

  As shown in FIG. 3, in this electric wire arrangement | positioning part 6, the lower end is opening, This opening is made into the electric wire insertion port 6a. The wall portion facing the lid 5 is an electric wire receiving portion 6b. Inside the electric wire arrangement part 6, the electric wire end stopper part 6c is formed in the upper end part (on the opposite side to the electric wire insertion port 6a) of the electric wire receiving part 6b. A port between the wire end stopper 6 c and the lid 5 is a relay wire insertion port 7.

The wire end stopper 6c is for stopping the end of the insulation-coated wire 20 inserted in the arrow Q direction (upward direction) from the wire insertion port 6a.
As shown in FIG. 2, the insulated wire 20 is formed by covering a plurality of linear conductive wires 20a with an insulating coating 20b.
A female screw 5 a is formed in a portion of the lid 5 corresponding to each of the electric wire arrangement portions 6, and a screw 8 is screwed into the female screw 5 a, and an end portion protruding into the electric wire arrangement portion 6. Is provided with a support shaft 9, and the insertion hole 10 a of the moving body holder 10 is loosely supported by the support shaft 9. A movable body 11 is fixed to the movable body holder 10.

  The moving body 11 is made of a conductive material and has a rectangular flat plate shape. Further, the movable body 11 is set to have a width dimension slightly smaller than the inner width dimension h of the electric wire arrangement portion 6. Accordingly, when the screw 8 is rotated in one direction (clockwise direction), the moving body 11 is prevented from rotating by the inner wall of the electric wire arranging portion 6, and the arrows in FIGS. When moving in the A direction (direction of the wire receiving portion 6b) and the screw 8 is rotated counterclockwise, it moves in the counter arrow A direction. That is, the moving body 11 is provided so as to face the electric wire receiving portion 6b and be movable in the approaching and separating directions with respect to the electric wire receiving portion 6b.

  A connecting terminal 12 made of a conductive material is provided on a surface 11a of the movable body 11 facing the wire receiving portion 6b. As shown in FIGS. 4 to 7, the connection terminal 12 has two bent portions 12 a at the intermediate portion and extending from the bent portions 12 a in different directions when viewed from the moving body 11 in the direction of the wire receiving portion 6 b. It has the one part 12b and 12c, and is formed in the substantially V shape. And the said bending part 12a is formed in thin wall, Thereby, two piece part 12b, 12c centering | focusing on this bending part 12a, the expansion direction (arrow K1 direction of FIG. 7), and a closing direction (FIG. 7). In the direction of arrow K2).

  As shown in FIG. 7, in the piece 12b of the connection terminal 12, a support portion 12b3 having a long hole portion 12b2 is provided at the base end portion 12b1, which is one end portion connected to one end of the bent portion 12a. It is formed so as to protrude at a substantially right angle with 12b. Similarly, a support portion 12c3 having a long hole portion 12c2 is formed at the base end portion 12c1 that is connected to the one end portion of the bent portion 12a in the other piece portion 12c so as to protrude substantially perpendicularly to the piece portion 12c. ing.

  In addition, on the facing surface 11a of the moving body 11, holdings 11b and 11c are projected at two places (two left-right symmetrical places) of the moving body 11, and the holding pins 11b and 11c are connected to the connection surface 11a, respectively. After being inserted into the long hole portions 12b2 and 12c2 of the terminal 12, the connecting terminals 12 are attached to the movable body 11 in a fall-prevented state by caulking the protruding end portions of the holding pins 11b and 11c to a large diameter. In this case, the long hole portions 12b2 and 12c2 are slidable with respect to the holding pins 11b and 11c, and thus the connection terminal 12 is attached so as to be able to expand and contract. The connection terminal 12 normally has an opening angle α in FIG. 9A.

As shown in FIG. 5, the connecting terminal 12 has the bent portion 12a positioned on a virtual center line P (also shown in FIGS. 6 and 9A) that bisects the lateral width of the moving body 11, and the virtual center line. An arrangement configuration in which the side piece portions 12b and 12c are distributed on both sides of the P, and an arrangement configuration in which the V-shaped open end portions 12b5 and 12c5 face the wire insertion port 6a of the wire arrangement portion 6 It has become.
The distal end portions (end portions opposite to the base end portions 12b1 and 12c1) 12b4 and 12c4 of the piece portions 12b and 12c of the connection terminal 12 are inclined with respect to the base end portions 12b1 and 12c1. In this case, the inclined form of the tip parts 12b4, 12c4 is set to an inclined form in which the end parts 12b5, 12c5 side are closer to the wire receiving part 6b sequentially from the bent part 12a side.

A blade 13 is formed at each of the tip portions 12b4 and 12c4. The blade 13 is set to a sharpness that can cut the insulating coating 20b of the insulating coated electric wire 20 when it is pressed against the insulating coated electric wire 20 (sharpness that can be surely cut). May be able to penetrate (enter the group of conductors 20a) by cutting, or may be allowed to penetrate by being bent by pressing.
Note that a flexible relay cable (not shown) is connected to the upper end of the moving body 11 and is connected to a connector in the programmable logic controller 1 through the relay wire insertion port 7.

  Now, when connecting the insulated wire 20 to the connection terminal 12, as shown in FIGS. 2 and 3, the movable body 11 is first placed at a position separated from the wire receiving portion 6b, and then the end of the insulated wire 20 is placed. The part is inserted into the electric wire arrangement part 6 from the electric wire insertion port 6a and inserted until it hits the electric wire end stopper 6c. And the moving body 11 is moved to the arrow A direction (direction approaching the insulated wire 20) by turning the screw 8 clockwise. Then, after the connection terminal 12 is pressed from the blade 13 toward the insulation coated electric wire 20 and the blade 13 cuts the insulation coating 20b, the conductor 20a group is cut or bent to enter the conductor 20a group, The connection terminal 12 contacts the conducting wire 20a group (see FIGS. 8 and 10). In this case, since the blade 13 is oblique with respect to the moving direction of the moving body 11, the insulating coating 20 b of the insulating coated electric wire 20 is compared with the case where the blade 13 is orthogonal to the moving direction of the moving body 11. Good cutting performance against

  According to such an embodiment, the V-shaped connection terminal 12 is pressed against the insulation-coated electric wire 20 by the movement of the moving body 11, and the blade 13 of the connection terminal 12 cuts the insulation coating 20 b of the insulation-coated electric wire 20. It penetrates into the conductor 20a group and comes into contact therewith. Thereby, the connection terminal 12 and the conducting wire 20a group of the insulation coating electric wire 20 can be simply connected only by moving the moving body 11 toward the electric wire receiving portion 6b. Moreover, after the connection terminal 12 cuts the insulating coating 20b, it further enters the inside of the conductor 20a group, so that not only the blade 13 portion of the connection terminal 12 but also the intruded region of the plate-like pieces 12b and 12c (see FIG. 8) (shown by the hatched line E in FIG. 8) also contacts the conductor 20a group. Furthermore, by making the connection terminal 12 into two V-shaped pieces 12b and 12c, it is possible to further increase the contact area with respect to the conductor 20a group as compared with a case where only one piece is used. As a result, the contact area can be greatly increased as compared with the conventional case where both edges in the slot of the press contact terminal are in contact with only the outside of the conductor group, thereby reducing the contact resistance and reducing the heat generation.

Here, as also shown in this embodiment, in the programmable logic controller 1, the insulation-coated electric wire 20 is often wired to another device in a wiring form that hangs down. In this case, the wiring length to other devices is usually as short as 40 to 50 cm, but this is an extremely rare case, but this wiring length becomes as long as 2 m or more depending on the equipment layout in the factory. Sometimes. If the wiring length is long, its own weight acts as a downward pulling force continuously over a long period of time, and there is a concern that the insulation covered electric wire 20 may come off at the connection terminal 12.
In this respect, according to the present embodiment, the pieces 12b and 12c of the connection terminal 12 penetrate into the conductor 20a group which is a rigid body. Movement in the removal direction can be prevented, and the insulation-coated electric wire 20 as a whole can be made difficult to come off.

  Further, in the present embodiment, the connection terminal 12 having the V shape can be expanded and contracted around the bent portion 12a, and the connection terminal 12 is opposed to the wire receiving portion 6b in the moving body 11. In the arrangement, the bent portion 12a is positioned on the virtual center line P that bisects the lateral width of the mobile body 11, and the pieces 12b and 12c are distributed on both sides of the virtual center line P. It was set as the arrangement | positioning form which the V-shaped open side of the connecting terminal 12 faces the said electric wire insertion port 6a of the electric wire arrangement | positioning part 6. FIG.

  According to this configuration, when a pulling force acts on the insulation-coated electric wire 20, the pulling force of the conducting wire 20a group, which is much more rigid than the insulating coating 20b, acts on the bent portion 12a located in the conducting wire 20a group. . For this reason, the bent portion 12a that exclusively receives the pulling force expands the V-shaped open-side end portions 12b5 and 12c5 that are located closer to the wire insertion port 6a than the bent portion 12a. By this expansion, the two pieces 12b, 12c further bite into the insulation-coated electric wire 20, so that the insulation-coated electric wire 20 can be further prevented from coming off.

In this case, since the width of each piece 12b, 12c is wider than the bent portion 12a on the open end 12b5, 12c5 side, the open end 12b5, 12c5 side penetrates deeply into the insulation-coated electric wire 20. The bite property is good and can further contribute to prevention of the insulation coated electric wire 20 from coming off.
Further, according to this embodiment, the blade 13 of the connection terminal 12 is inclined with respect to the base end portions 12b1 and 12c1, that is, is inclined obliquely with respect to the moving direction of the connection terminal 12. As compared with the case where the blade 13 is orthogonal to the moving direction of the moving body 11, the cutting resistance of the insulating coated electric wire 20 to the insulating coating 20b can be reduced, and the insulating coating 20b can be cut reliably.

Second Embodiment
Next, FIG. 11 shows a second embodiment. In this embodiment, the arrangement form of the connection terminals 12 is such that the bent portion 12a of the connection terminal 12 is on the wire insertion port 6a side and the V-shaped opening side is arranged. Ends 12b5 and 12c5 are on the side opposite to the electric wire insertion port 6a. In the second embodiment, the bent portion 12a that receives the force in the pulling direction from the conductor 20a group of the insulation-coated electric wire 20 is located on the side opposite to the electric wire insertion port 6a from the bent portion 12a. Force is applied in a direction to close both ends 12b5 and 12c5 of the. That is, a force is received in the direction in which the two pieces 12b and 12c close and contract. As a result, the two pieces 12b and 12c grip the portion 20J between the two pieces 12b and 12c of the insulated wire 20. As a result, also in the second embodiment, the insulation-coated electric wire 20 can be hardly pulled out.

<Third Embodiment>
12 and 13 show a third embodiment. This third embodiment is characterized by the following points. That is, the connection terminal 12 is arranged in such a manner that the V-shaped open end portions 12b5 and 12c5 face the wire insertion port 6a of the wire arrangement portion 6, and the two pieces 12b and 12c in the connection terminal 12 are arranged. For example, one piece 12b extends longer than the other piece 12c.

  According to the third embodiment, when a pulling force is applied to the insulation-coated electric wire 20, as shown in FIG. 13, the end portions 12 b 5 and 12 c 5 on the V-shaped opening side are displaced in the expanding direction. In this case, the degree of displacement of the end 12b5 of the longer one 12b of the two pieces 12b and 12c is large, and the insulation-coated electric wire 20 is likely to come out by visually recognizing this from the wire insertion opening 6a. Can detect the situation. In this case, if the main body case 4 is made of a transparent member, it is easier to visually recognize.

  Further, as in the third embodiment, in a configuration in which a plurality of electric wire arrangement portions 6 are arranged side by side and each of the electric wire arrangement portions 6 is provided with the movable body 11 and the connection terminal 12, it is assumed that the reference FIG. As shown in FIG. 5, when the longer one part 12b of the specific connection terminal, for example, the connection terminal 12M is oriented differently from the longer one part 12b of the other connection terminal 12, the specific connection terminal 12M and the other connection When the terminal 12 is expanded and deformed (see FIG. 16), both longer pieces 12b come close to each other (see the portion D in FIG. 16), and there is a possibility that both are short-circuited.

  On the other hand, according to the third embodiment, the longer one portion 12b of the two pieces 12b, 12c of each connection terminal 12 is arranged in the same orientation in each wire arrangement portion 6. Therefore, the longer pieces 12b do not approach each other in the adjacent connection terminals 12, and even if the adjacent connection terminals 12 are expanded and deformed, the longer pieces 12b are short-circuited. There is no fear.

<Other embodiments>
As shown in FIG. 14, the insulating coating 20 b can be cut by the blade 13 even if the connection terminal 12 has a configuration in which the tip (blade 13 portion) is orthogonal to the moving direction of the moving body 11. It is good also as a structure.
Further, the wire end stopper 6c may not be provided. The conductor group may be a linear conductor concentrator or a stranded wire.
Insulation-coated wires include control power wires and AC power wires, and the overall thickness and the thickness of the conductor group are also different. Therefore, what is necessary is just to set suitably the horizontal width of the said electric wire arrangement | positioning part and a connecting terminal according to these various electric wires.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and equivalents thereof.

  In the drawings, 1 is a programmable logic controller, 2 is a terminal block device, 3 is a device body, 4 is a body case, 5 is a lid, 6 is an electric wire placement portion, 6a is an electric wire insertion port, 6b is an electric wire receiving portion, and 8 is an electric wire receiving portion. A screw, 11 is a moving body, 11a is a facing surface, 12 is a connection terminal, 12a is a bent portion, 13 is a blade, 20 is an insulated wire, 20a is a conductor, and 20b is an insulating film.

Claims (3)

In a terminal block device of a programmable logic controller for connecting an insulating coated electric wire (20) formed by covering a plurality of linear conductive wires (20a) with an insulating coating (20b),
An electric wire placement portion (6) having an electric wire insertion opening (6a) into which an end portion of the insulating coated electric wire (20) is inserted and having an electric wire receiving portion (6b) on which the inserted insulating coated electric wire (20) is received and supported. )When,
A moving body (11) that faces the electric wire receiving portion (6b) and is movable in an approaching and separating direction with respect to the electric wire receiving portion (6b);
The middle portion has a bent portion (12a) and has two plate-like pieces (12b, 12c) extending from the bent portion (12a) in different directions, and is formed in a substantially V shape and the bent portion ( 12a) and a connection terminal (12) that can be expanded and contracted,
The connection terminal (12) corresponds to the virtual center line (P) that bisects the lateral width of the moving body (11) on the surface of the moving body (11) facing the wire receiving portion (6b). The bent portion (12a) is positioned, and each piece portion (12b, 12c) is arranged on both sides of the virtual center line (P).
Furthermore, the connection terminal (12) includes a blade (13) capable of cutting the insulating coating (20b) of the insulating coated electric wire (20) at the end on the electric wire receiving portion (6b) side,
The blade (13) of the connection terminal (12) is moved in the direction in which the movable body (11) approaches the wire receiving portion (6b), so that the insulating coating (20b) of the insulating coated electric wire (20). Is a terminal block device of a programmable logic controller that is cut into the lead wire (20a) group to come into contact with the lead wire (20a) group.   The connection terminal (12) has a V-shaped open side end (12b5, 12c5) facing the wire insertion port (6a) of the wire arrangement portion (6), and the connection terminal (12) The terminal block device of the programmable logic controller according to claim 1, wherein one of the two pieces (12b, 12c) extends longer than the other.   A plurality of the electric wire arrangement portions (6) are arranged in parallel, and the moving body (11) and the connection terminal (12) are provided in each electric wire arrangement portion (6). The terminal block device of the programmable logic controller according to claim 2, wherein the one of the two pieces (12b, 12c) is arranged in the same direction in each electric wire arrangement part (6).

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