JP2001217021A - Terminal strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal strip in which a short insert wire can be connected and improves the fitting work efficiency greatly even in a limited space for installation and where the wire has to be pulled out directly from inside. SOLUTION: The fitting insert hole 3b of a terminal strip 3 inserting an inserting fitting 2 is formed for its diameter becoming shorter in a tapered shape in the direction of removing a screw 5 and when the insert fitting 2 is inserted in the fitting insert hole 3b, the insert fitting 2 is securely locked to the fitting insert hole 3b without pulling out. And after the insert fitting is securely locked in the fitting insert hole 3b, a screw 5 is tightened to the insert fitting 2 through a washer 9 having a width of narrowly filling in the partition portion 3a at both sides of a conductive wire connection portion 4, and the insert fitting 2 is tightened and fitted completely engaged to the fitting insert hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal board, and more particularly to a terminal board in which a place where the terminal board is attached is limited, such as a motor, and when it is necessary to directly connect wiring drawn from the inside. An insert fitting is attached to the wiring by fusing or the like, and the insert fitting is inserted into the fitting insertion hole of the main body and locked in the fitting insertion hole, and then a screw used for connecting a conductive wire later is used. The present invention relates to a terminal board having extremely good workability, in which an insert fitting can be securely fixed to a main body by being tightened into the insert fitting.

[0002]

2. Description of the Related Art Terminal boards are generally widely used as input / output contacts for printed wiring boards, programmable controllers, switchboards, and the like, and the types of terminals vary widely depending on the number of terminals, shapes, conductor connection forms, and the like. It can be selected and used depending on the application.

[0003] In a motor having a considerably large output, such as a motor for a machine tool such as an NC lathe, a terminal board is used even when it is necessary to connect an internal wiring to an external conductive wire. In the case of this motor, the length of the internal wiring is limited, so that the length of the internal wiring that can be pulled out from the motor at the time of connection work to the terminal board is very small.
Therefore, when a conventional terminal board in which terminal fittings are embedded in an insulator in advance is to be connected to the internal wiring by, for example, soldering, soldering must be performed in a small space and below the terminal board. However, workability was very poor, and soldering was almost impossible even by hand soldering.

[0004] Even though the other parts of the motor are completed, the importance of the terminal board is so high that all the development and manufacturing plans of the motor may be canceled due to poor attachment of the terminal board. Development of a terminal board that can be efficiently connected with good workability to internal wiring with a short lead-out even in a small space has been awaited.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and an object of the present invention is to insert a metal fitting insertion hole of a main body into which an insert metal fitting is to be inserted. It is formed in a tapered shape in which the diameter decreases in the removing direction, and is configured so that when the insert fitting is pushed into the fitting insertion hole, the insert fitting is securely locked without falling out from the fitting insertion hole. By this, in the stage of fitting into the fitting insertion hole in the mounting process of the insert fitting, the insert fitting is once locked to be in a stable state,
It is another object of the present invention to easily perform a next step of tightening a screw on an insert.

Another object of the present invention is to securely lock the insert fitting in the fitting insertion hole, and then tighten a screw into the insert fitting through a washer having a width enough to bite into the partition part on both sides of the conductive wire connection part. , The insert fitting is tightly fitted in the fitting insertion hole and completely fixed, thereby facilitating the work of connecting the internal wiring with a short lead-out amount to the terminal board, and dramatically improving the work efficiency. It is to make it.

Still another object of the present invention is to form a recess in the inner surface of the fitting insertion hole, and attach a temporary holding spring having a locking portion to the insert fitting so as to fit into the fitting insertion hole. When the insert is pushed into the fitting insertion hole, the locking portion of the temporary holding spring is inserted into the concave portion, whereby the insert fitting is inserted into the fitting insertion hole at the stage of fitting. This is to ensure that it is locked in the hole.

Another object of the present invention is to provide a temporary holding spring having a locking portion formed in the above-described configuration, in which an engaging portion of the insert fitting is not allowed to be inserted into the fitting insertion hole but not allowed to be removed. By attaching the insert fitting to the fitting insertion hole after attaching it to the formed small-diameter portion, when the insert fitting is fitted into the fitting insertion hole, the locking portion of the temporary presser spring inserts the fitting. It is elastically deformed by the hole, is fitted along with the insert fitting along the inner surface of the fitting insertion hole, and when the locking portion reaches the concave portion of the inner face of the fitting insertion hole, the engaging member is deformed by the inner surface. The stop portion immediately returns to the original shape and engages with the concave portion, and if the insert metal fitting is once fitted into the metal fitting insertion hole until the locking portion engages with the concave portion, Is to to be locked completely engaged is the direction to withdraw the insert fittings.

Still another object is that, in the above configuration, after the insert fitting is locked in the fitting insertion hole, a plurality of projections are formed through the washer having a plurality of protrusions so as to bite into the partitions on both sides of the conductive wire connection part. By arranging the screw to be screwed into the insert fitting until the washer comes into contact with the insert fitting, the washer is fixed by biting into the partition, and the insert fitting is inserted from the position where the temporary holding spring locks the tapered fitting. Further proceeding in the direction of the small diameter of the hole, it is to be tightly fitted and completely fixed so that the mounting process of the insert fitting is completed, and by this, once loosening the screw,
For example, the conductive wire to which the crimp terminal is attached is inserted, and then the screw is tightened again so that the conductive wire can be connected.

[0010]

In summary, the present invention (Claim 1) provides a plurality of insert fittings which are fixed to a main body made of an insulator in an aligned state, and is connected to each conductive wire connecting portion partitioned by a partition portion. In a terminal board configured to connect conductive wires using a pair of screws, a metal fitting insertion hole of a main body into which an insert metal fitting is inserted is formed in a tapered shape whose diameter decreases in a direction in which the screw is removed, and the insert metal fitting is formed. When inserted into the fitting insertion hole, the insert fitting is securely locked without falling out of the fitting insertion hole, and the insert fitting is pushed into the fitting insertion hole to securely insert the insert fitting into the fitting insertion hole. After engaging the screws, the screws are tightened into the insert fittings through washers having a width that slightly bites into the partitions on both sides of the conductive wire connection. Is characterized in that is configured as a concert fitting by interference fit fitted into the fitting insertion hole is completely fixed.

According to the present invention (claim 2), a plurality of insert fittings are fixed to a main body made of an insulator in an aligned state, and each of the conductive wire connecting portions separated by a partition portion is electrically connected to each other by using screws. In a terminal board configured to connect wires, a metal fitting insertion hole of a main body into which an insert metal fitting is inserted is formed in a tapered shape whose diameter decreases in a direction in which a screw is removed, and a concave portion is formed on an inner surface of the metal fitting insertion hole. A temporary holding spring having a locking portion formed is attached to the insert metal fitting so as to fit into the fitting insertion hole, and the insert metal fitting is pushed in until the locking portion of the temporary holding spring enters the concave portion. After securely securing the metal fittings to the metal fittings insertion holes, tighten the screws into the insert metal fittings through washers that have a width enough to bite into the partitions on both sides of the conductive wire connection. It is characterized in that it has configured to secure by bite the washer in the partition portion as well as more fully secured to the insert fittings allowed interference fit fitted into the fitting insertion hole.

According to the present invention (claim 3), according to the present invention, a plurality of insert fittings are fixed to a main body made of an insulator in an aligned state, and each of the conductive wire connection sections separated by the partition section is electrically connected to each other by using screws. In a terminal board configured to connect wires, a metal fitting insertion hole of a main body into which an insert metal fitting is inserted is formed in a tapered shape whose diameter decreases in a direction in which a screw is removed, and a concave portion is formed on an inner surface of the metal fitting insertion hole. The temporary holding spring, which is formed and has a locking portion formed to allow insertion of the insert fitting into the fitting insertion hole and not allowed to be removed, is attached to a small-diameter portion formed in the middle of the insert fitting in the axial direction. The insert metal fitting is configured to fit into the metal fitting insertion hole, and the insert metal fitting is pushed in until the locking part of the temporary holding spring is inserted into the concave portion to securely lock the insert metal fitting in the metal fitting insertion hole. The insert fitting is fastened to the insert fitting by tightening a screw into the insert fitting through a washer formed with a plurality of protrusions so as to slightly bite into the partition part on both sides of the rear conductive wire connection part until the washer contacts the insert fitting. The insertion hole is further tightly fitted and completely fixed, and it is configured to be fixed by cutting into the partition, and then the insert fitting and washer are not detached even if the screw is loosened. It is characterized by the following.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. A terminal board 1 according to the present invention comprises a plurality of inserts 2 fixed to a main body 3 made of an insulator in an aligned state in FIGS.
The conductive wires 12 are connected to the respective conductive wire connecting portions 4 partitioned by a using screws 5.

The insert fitting 2 is, as shown in FIGS. 2 to 4, fixed to the main body 3 and processed by a conductor such as brass, which serves as a terminal fitting. Has a stepped cylindrical shape having a small diameter portion 2a formed thereon, and the large diameter portion 2b is subjected to longitudinal knurling, and is parallel to the axial direction from an upper end 2c formed to have a smaller diameter than the large diameter portion 2b. A female screw 2d is formed, and a screw 5 is screwed into the female screw 2d.

The lower end 2e of the insert fitting 2 projecting from the main body 3 when fixed to the main body 3 is formed in a thin cylindrical shape having a small external shape, and a wiring drawn out from the inside of a motor or the like (not shown) is connected to the lower end 2e. The core wire 8a is inserted and connected by fusion or pressure bonding.

In the main body 3, conductive wire connecting portions 4 are formed at three places, for example, in two steps, and each conductive wire connecting portion 4 is partitioned by a wall-shaped partition 3a. The partition portion 3a is provided with a very small draft angle, and the base side is formed thicker.

As shown in FIGS. 2 and 3, the fitting insertion hole 3b of the main body 3 into which the insert fitting 2 is fitted is formed in a tapered shape whose diameter decreases in a direction in which the insert fitting 2 is fitted. The angle is, for example, 0.1 to 0.5.
2 °. The minimum diameter of the metal fitting insertion hole 3b is such that the metal fitting 2 is tightly fitted when the metal fitting 2 is completely fitted.

When the insert fitting 2 is inserted into the fitting insertion hole 3b, the provisional presser spring 6 having a locking portion 6c which allows the insertion of the insert fitting 2 and does not allow the insertion of the insert fitting 2 is not allowed.
Is attached to a small-diameter portion 2a formed in the middle of the insert fitting 2 in the axial direction.

As shown in FIG. 4, the temporary holding spring 6 is formed by forming an elastic body such as phosphor bronze, stainless steel, resin or the like into a thin cylindrical shape whose outer diameter is almost the same as the large diameter portion 2b of the insert fitting 2. A slot 6b is formed at one location in the circumferential direction of the cylindrical portion 6a over the entire length in the axial direction. For example, two locking portions 6c protrude from the lower end 6d so as to spread diagonally downward, and are integrally formed. Is formed. The length of the cylindrical portion 6a of the temporary holding spring 6 is, for example, about 2 mm shorter than the length of the small diameter portion 2a of the insert fitting 2, so that the temporary holding spring 6 can be attached to the small diameter portion 2a with a margin. I have.

For example, a pair of recesses 3d are formed in the inner surface 3c of the metal fitting insertion hole 3b, and the locking part 6c of the temporary holding spring 6 attached to the metal fitting 2 when the metal fitting 2 is inserted. It is designed to engage with the recess 3d. The concave portion 3d may have any shape as long as the locking portion 6c of the temporary holding spring 6 can be locked. Therefore, the concave portion 3d may be formed as an annular groove that goes around the inner surface 3c of the metal fitting insertion hole 3b in the circumferential direction. Alternatively, it may be an arc groove corresponding to the number and position of the locking portions 6c.

As shown in FIG. 3 to FIG. 5 and FIG. 9, the insert fitting 2 fitted until the locking portion 6c of the temporary holding spring 6 enters the concave portion 3d is provided on both sides of the conductive wire connecting portion 4. By inserting the screw 5 into the insert fitting 2 until the washer 9 comes into contact with the insert fitting 2 through the washer 9 formed with a plurality of projections 9a so as to slightly bite into the partition 3a, the insert fitting 2 is removed. The fitting hole 3b is further tightly fitted into the fitting insertion hole 3b so as to be completely fixed. The screw 5 is passed through a spring washer 10 before passing through the washer 9.

As shown in FIG. 9, the washer 9 has, for example, a mountain-shaped projection 9 on two opposite sides of, for example, a square conductive plate.
a is formed integrally at each of three places, and a through hole 9b through which the screw 5 passes is formed at the center. In addition, the number of the protrusions 9a is not limited to three places,
As shown by 0, the number may be increased, for example, to 7 places per side.

Further, in the above configuration, the temporary holding spring 6 is attached to the insert fitting 2, but the present invention is not limited to this, and the insert fitting 2 is inserted into the fitting insertion hole 3b.
Any structure may be used as long as it is securely locked when pushed in to some extent.For example, a structure in which a locking portion is integrally formed with an insert fitting may be used. The sleeve may be provided with a protruding locking portion, or a sleeve or the like having a protruding locking portion may be fitted into the fitting insertion hole.

The present invention is configured as described above,
Hereinafter, the operation will be described. First, insert bracket 2
The first step of the mounting process from the insertion of the wire into the main body 3 until it is completely fixed by the screw 5 and the washer 9 will be described. The lower end 2e of the insert fitting 2 has a wiring drawn out from the inside of a motor or the like (not shown). 8, the core wire 8a is inserted and connected by fusion or pressure bonding, and the temporary holding spring 6 is attached to the small diameter portion 2a of the insert fitting 2 with the locking portion 6c down, as shown in FIG. Then, the insert fitting 2 is pushed in the direction of arrow A from the lower side where the inner diameter of the fitting insertion hole 3b is large. At this time, the pushing is performed while aligning the position of the locking portion 6c of the temporary holding spring 6 with the position of the concave portion 3d of the fitting insertion hole 3b.

Since the metal fitting insertion hole 3b is tapered, the large diameter portion 2b is gradually fitted into the inner surface 3c by pushing the metal fitting 2 in. When the locking portion 6c of the temporary holding spring 6 reaches the metal fitting insertion hole 3b, the locking portion 6c is deformed in the direction of arrow B so as to be forcibly folded.
While sliding on the inner surface 3c of the metal fitting insertion hole 3b, the metal enters the metal fitting insertion hole 3b together with the metal insert 2.

When the insert fitting 2 is pushed until the locking portion 6c reaches the concave portion 3d of the inner surface 3c of the fitting insertion hole 3b, the folded locking portion 6c instantaneously returns in the direction of arrow C. It is again in a protruding state, and at the same time, an operator (not shown) feels a sense of moderation.

As a result, the locking portion 6c is locked in the concave portion 3d, so that even if a force such as pulling out or pushing out the insert fitting 2 acts, the insert fitting 2 does not come out of the fitting insertion hole 3b. . The force required to push the insert 2 so far is, for example, 2
It is 0 to 40 N, and it is possible to sufficiently push it in manually.

Next, the second step of the mounting process of the insert fitting 2 is described.
Describing the stages, as shown in FIGS. 3 and 5,
Pass the screw 5 with the spring washer 10 through the washer 9
While aligning the washer 9 so that the projection 9a of the washer 9 comes into contact with the partition 3a on both sides of the conductive wire connection portion 4 related to the fitting insertion hole 3b in which the insert fitting 2 is locked, the screw 5 is screwed. When the female screw 2d of the insert metal fitting 2 is tightened, the large diameter portion 2b of the insert metal fitting 2 is further fitted into the inner surface 3c of the metal fitting insertion hole 3b in the direction of the arrow A while being fitted and fitted. The insert 9 is inserted into the partition 9 while the projection 9a cuts into the partition 3a.
Go down to approach.

At this time, if there is room in the metal fitting insertion hole 3b, the temporary holding spring 6 advances in the direction of arrow A together with the metal fitting 2 as shown in FIG. If there is no head and it is not possible to proceed in the direction of arrow A, it stays at that position and
Only one fits in the direction of arrow A. This is the temporary holding spring 6
The length of the cylindrical portion 6a is smaller than the small diameter portion 2a of the insert fitting 2.
Is shorter than the length.

The projection 9a of the washer 9 cuts into the partition 3a because the partition 3a has such a slope that the thickness of the partition 3a becomes thicker toward the root side. As shown in FIG. 3 and the like, a slight vertical streak 3e is formed in the partition 3a. Note that the large-diameter portion 2b of the insert fitting 2 on which the vertical knurling has been performed.
However, as shown in FIG. 7, the insert metal fittings 2 can be fitted efficiently without biting into the inner surface 3 c of the metal fitting insertion hole 3 b even if the screws 5 are tightened.

Then, the insert fitting 2 has a fitting insertion hole 3b.
If the screw 5 is tightened until the washer 9 comes into contact with the upper end 2c of the insert fitting 2, the insert fitting 2 and the washer 9 are completely fixed, and the mounting process is completed.

After that, when the screw 5 is loosened, only the screw 5 and the spring washer 10 come off, so that, for example, a conductive wire 12 with a crimp terminal 11 is inserted into the washer 9 as shown in FIG. Is turned in the direction of arrow D and the screw 5 is tightened in the direction of arrow E.
The conductive wires 12 can be wired to the conductive wire connecting portions 4 of the terminal board 1.

[0033]

According to the present invention, as described above, the metal fitting insertion hole of the main body into which the metal fitting is to be inserted is formed in a tapered shape whose diameter decreases in the direction in which the screws are removed, and the metal fitting is inserted into the metal fitting insertion hole. Since the insert fitting is configured to be securely locked without being pulled out from the fitting insertion hole when pushed in, the insert fitting is temporarily engaged at the stage of fitting into the fitting insertion hole in the mounting process of the insert fitting. As a result, a stable state can be attained, and as a result, there is an effect that the next step of tightening the screw to the insert fitting can be easily performed.

After the insert fitting is securely locked in the fitting insertion hole, a screw is screwed into the insert fitting through a washer having a width enough to bite into the partition on both sides of the conductive wire connecting portion, and the insert fitting is inserted. It is configured to be tightly fitted and completely fixed in the fitting insertion hole, so that the work of connecting the internal wiring with a short lead-out amount to the terminal board is simplified, and the work efficiency can be dramatically improved. is there.

Further, in the above configuration, a recess is formed in the inner surface of the fitting insertion hole, and a temporary holding spring having a locking portion is attached to the insert fitting so as to fit into the fitting insertion hole. By pushing the insert fitting into the fitting insertion hole, the locking portion of the temporary holding spring can be inserted into the recess, and as a result, the insert fitting is securely inserted into the fitting insertion hole at the stage of fitting into the fitting insertion hole. The effect of being locked is obtained.

[0036] In the above structure, the temporary holding spring formed with a locking portion that allows the insert fitting to be inserted into the fitting insertion hole but does not allow the insertion fitting to be removed is formed into a small-diameter portion formed in the middle of the insert fitting in the axial direction. Since the insert fitting is configured to fit into the fitting insertion hole after being attached to the fitting, the fitting portion of the temporary holding spring is elastically deformed by the fitting insertion hole when the insert fitting is fitted into the fitting insertion hole, And it is fitted along with the insert fitting along the inner surface of the fitting insertion hole, and when the locking portion reaches the concave portion of the inner surface of the fitting insertion hole, the locking portion deformed by the inner surface immediately returns to the original position. It is possible to return to the shape and engage with the concave portion. As a result, once the insert metal fitting is inserted into the metal fitting insertion hole until the locking portion engages with the concave portion, the insert metal fitting is removed. There is an effect that is locked completely engaged the direction.

Further, in the above construction, after the insert fitting is locked in the fitting insertion hole, the washer is formed through a washer having a plurality of projections formed so as to slightly bite into the partition portions on both sides of the conductive wire connecting portion. Since the screw is screwed into the insert fitting until it comes into contact with the insert fitting, the washer is fixed by biting into the partition portion, and the insert fitting is moved from the locking position by the temporary holding spring to the tapered fitting insertion hole in the small diameter direction. In addition, it is possible to make a tight fit and complete fixation so that the mounting process of the insert fitting can be completed, and as a result, the screw is loosened once, for example, the conductive terminal to which the crimp terminal is mounted. The excellent effect that the conductive wire can be connected by the usual work of inserting the wire and tightening the screw again is obtained. It is.

[Brief description of the drawings]

FIG. 1 is a perspective view of a terminal board.

FIG. 2 is a longitudinal sectional view of a terminal board.

FIG. 3 is a partially exploded perspective view of the terminal board in which a screw, a spring washer and a washer, an insert fitting and a temporary holding spring to which wiring is connected are exploded.

FIG. 4 is an exploded perspective view of a screw, a spring washer and a washer, a wiring, an insert fitting, and a temporary holding spring.

FIG. 5 is an enlarged longitudinal sectional view of a main part of the terminal board showing a state in which the insert fitting is tightly fitted into the fitting insertion hole by tightening a screw through a washer through the insert fitting.

FIG. 6 is a longitudinal sectional view of an essential part showing a process of deforming the temporary holding spring when the insert fitting having the temporary holding spring attached thereto is inserted into a fitting insertion hole of the main body.

FIG. 7 is a plan view of a main part of a partial cross section of the terminal board showing a state in which a large-diameter portion of an insert fitting subjected to longitudinal knurling is biting into a fitting insertion hole of a main body.

FIG. 8 is a partially cutaway perspective view of the terminal board showing a state in which a conductive wire with a crimp terminal is wired by tightening a screw with a tool.

FIG. 9 is a perspective view of a washer in which three pairs of protrusions are formed.

FIG. 10 is a perspective view of a washer in which seven pairs of protrusions are formed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal board 2 Insert fitting 2a Small diameter part 3 Main body 3a Partition part 3b Fitting insertion hole 3c Inner surface 3d recess 4 Conductive wire connection part 5 Screw 6 Temporary holding spring 6c Locking part 9 Washer 9a Projection

Claims (3)

[Claims] 1. A structure in which a plurality of insert fittings are fixed to a main body made of an insulator in an aligned state, and conductive wires are connected to respective conductive wire connecting portions partitioned by partition portions using screws. In the terminal board, a metal fitting insertion hole of the main body into which the insert metal fitting is inserted is formed in a tapered shape having a diameter decreasing in a direction in which the screw is removed, and the insert metal fitting is inserted into the metal fitting insertion hole when the insert metal fitting is pressed into the metal fitting insertion hole. After the insert fitting is securely locked without coming out of the fitting insertion hole, the insert fitting is pushed into the fitting insertion hole, and the insert fitting is securely locked in the fitting insertion hole. The screw is screwed into the insert fitting through a washer having a width small enough to bite into the partition part on both sides of the wire connection part. A terminal board, wherein an insert metal fitting is tightly fitted into said metal fitting insertion hole to be completely fixed. 2. A structure in which a plurality of insert fittings are fixed to a body made of an insulator in an aligned state, and conductive wires are connected to respective conductive wire connecting portions partitioned by partition portions using screws. In the terminal board, a fitting insertion hole of the main body into which the insert fitting is fitted is formed in a tapered shape whose diameter decreases in a direction in which the screw is removed, and a concave portion is formed on an inner surface of the fitting insertion hole. A temporary holding spring formed with a locking portion is attached to the metal fitting so as to fit into the metal fitting insertion hole, and the insert metal fitting is pushed in until the locking part of the temporary holding spring enters the concave portion. After the insert fitting is securely locked in the fitting insertion hole, the screw is passed through a washer having a width enough to bite into the partition part on both sides of the conductive wire connection part. A terminal characterized in that the insert fitting is tightly fitted into the fitting insertion hole by being screwed into the insert fitting, thereby completely fixing the insert fitting, and the washer is cut into the partition to be fixed. Board. 3. A structure in which a plurality of insert fittings are fixed to a body made of an insulator in an aligned state, and conductive wires are connected to respective conductive wire connecting portions partitioned by partition portions using screws. In the terminal board, the metal fitting insertion hole of the main body into which the insert metal fitting is inserted is formed in a tapered shape whose diameter decreases in a direction in which the screw is removed, and a recess is formed on an inner surface of the metal fitting insertion hole. After attaching a temporary holding spring formed with a locking portion that allows insertion of the insert fitting into the insertion hole but does not allow removal of the insert fitting, to the small-diameter portion formed in the axial middle of the insert fitting, Is inserted into the metal fitting insertion hole, and the insert metal fitting is pushed in until the locking portion of the temporary holding spring is inserted into the concave part, and the insert metal fitting is inserted into the metal fitting. After being securely locked in the tool insertion hole, the screw is passed through the washer having a plurality of protrusions formed so as to slightly bite into the partition portions on both sides of the conductive wire connection portion until the washer contacts the insert metal fitting. By tightening the insert fitting into the fitting insertion hole, the insert fitting is further fixedly fitted and completely fixed, and is also fixed so as to bite into the partition portion, and then loosen the screw. A terminal board characterized in that the insert fitting and the washer are not detached even when the terminal board is detached.