JP2001118616A - Terminal board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at providing a terminal board 10 structure not needing an extra man-hour in cable connection at a customer's. SOLUTION: In a terminal board that is composed of a cable, an electric contact 14 that consists of a wire connection part 36 connected with this cable, a fixed part 38 that is fixed at a block 12 and a connection part 40 that connects a counterpart, a block 12 to which the electric contact point 14 is supported/fixed and which has the inside of a connection 16 as well, a screw with washer 18 to contact/fix said cable on the contact 14, and a nut 34 which hinges a screw with washer 18, a protrusion 30 is installed inside of an insert hole 32 of said block 12 in which the screw with washer 18 is inserted and in addition a tip of the screw with washer 18 is also extended and installed, and a concave 33 engaged at the protruded part 30 is mounted, and by the fact that the protrusion 30 is engaged to the concave 33, the above purpose can be achieved by opening a gap which is just enough to insert the cable between the contact 14 and the bottom end of the washer 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block used for an industrial control system (sequencer) and the like, and more particularly to a positioning structure for a screw with a washer.

[0002]

2. Description of the Related Art A conventional electrical connector will be described with reference to the drawings. FIG. 4 is a longitudinal sectional view of a conventional terminal block 50. Generally, the terminal block 50 includes a block 52, a contact 14, a screw 18 with a washer, and a nut 34.
However, a cover may be used depending on specifications and the like.
The required number of contacts 14 are fixed to the block 52 by press fitting or the like. A cable (not shown) is connected to the terminal block 50. The cable is inserted between the screw with washer 18 and the contact 14, and is fixed by tightening the screw with washer 18 with a screwdriver. Also, when removing the cable, you can remove it by loosening the screw with washer 18 with a screwdriver.

[0003]

In the terminal block having the above-described structure, the terminal block is generally tightened and delivered to a customer so that the screw with washer does not fall off. Then, there is a problem that the customer cannot connect the cable without loosening the screw with the washer when connecting the cable. That is, there is a problem that extra man-hours for loosening a screw with a washer for cable connection are required.

[0004] An object of the present invention is to provide a terminal block 10 having a structure that does not require extra steps even when connecting a cable to a customer.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide a cable, a connection portion 36 for connecting the cable, and a block 1.
2 and a connecting portion 4 connected to a counterpart
0, a block 12 that holds and fixes the contact 14 and has a required number of connection portions 16 therein, a screw 18 with a washer for contacting and fixing the cable to the contact 14, and a washer Screw 1
8 and a nut 34 that is screwed together with the block 12 into which the washer screw 18 is inserted.
The protrusion 30 is provided inside the insertion hole 32 of the above, and the tip of the screw 18 with the washer is extended, and a recess 33 is provided for engaging with the protrusion 30. The protrusion 30 engages with the recess 33. This can be achieved by opening the space between the contact 14 and the lower end of the washer 24 as much as the cable is inserted.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A terminal block according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a screw with a washer and a terminal block to which the screw is attached, and FIG. 2 is a longitudinal sectional view of the terminal block of the present invention. FIG. 3 is a longitudinal sectional view of the terminal block of the present invention when another screw with a washer is used. Terminal block 1 of the present invention
Reference numeral 0 denotes a cable, a contact 14, a block 12, a screw 18 with a washer, and a nut 34. As described in the past, depending on the specification, a cover may be used. Hereinafter, each component will be described.

First, the block 12 will be described. The block 12 is made of an electrically insulating plastic and is manufactured by injection molding of a known technique. As the material of the block 12, moldability, dimensional stability, and low cost are required, so that polybutylene terephthalate (PBT), polyamide (PA), polycarbonate (PC), or the like is often used. As shown in FIG. 1, the block 12 is provided with a required number of connection sections 16 as spaces for connecting cables. The contact 14 is fixed in the connection portion 16 by press fitting or the like, and a screw 18 with a washer is inserted.
The electrical connection is made by holding the cable between and.

A side wall 20 is provided between each of the screws 18 with washers, and the inside 16 of the connection portion is an independent space. The size of the connection portion 16 and the side wall 20 may be any size as long as the screw 18 with washer and the cable can be inserted, but is appropriately designed in consideration of the size of the terminal block 10 and the strength of the block 12. A contact insertion hole for inserting the contact 14 and a nut insertion hole 35 into which a nut 34 for screwing with the washer screw 18 are inserted on the opposite side of the connection portion 16 from the direction of insertion of the washer screw 18. Is provided.
The size of the contact insertion hole 35 is larger than the contact 14 by about 0.05 to 0.15 mm. The shape of the nut insertion hole 35 conforms to the shape of the nut 34 so that the nut 34 does not rotate when the screw 16 with washer is screwed.
It is about 8 mm larger. The nut insertion hole 3
5, an insertion hole 32 is provided. The insertion hole 32 is provided with the washer screw 1 when the washer screw 18 is fixed.
6 is an escape portion at the tip end.

A block 12 into which a screw 16 with a washer is inserted.
The projection 30 is provided inside the insertion hole 32. The projection 30 may be integral with the block 12 or may be a separate component. The position of the projection 30 is appropriately designed so that the cable enters the space between the contact 14 and the lower end of the washer 24 when the recess 33 of the screw 18 with the washer is engaged with the projection 30. The amount of protrusion of the protrusion 30 is determined by the screw 18 with washer.
At the above-mentioned position when attaching, the concave portion 33 of the washer screw 18 is found to be engaged with the projection 30 of the block 12 with the sense of a hand, and when the washer screw 18 is tightened to connect a cable. The projection 30 is designed to be pierced. When the cable is connected by tightening the screw 18 with the washer as described above, the protrusion 30 may be pierced because the space for receiving the cable only needs to be opened at the time of customer delivery. As for the shape, it is better to make the projections 30 elastic so that the projections 30 are not damaged when tightened. The protruding portion 30 is made as a separate component and is made of an elastic material (an elastic body such as rubber or elastomer or an elastic metal), and has a structure that bends in a downward direction of the insertion hole 32 when the washer screw 18 is tightened. It is desirable to do.

In the present embodiment, as shown in FIG.
Although the inside of the connection portion 16 into which the 8 is inserted is arranged in one row, it may be two, three or any number depending on the specification application.

Next, the contact 14 will be described.
The contact 14 is made of metal and is formed by a known press working or the like. The material of the contact 14 is required to be workable or springy, and examples thereof include brass, phosphor bronze, and beryllium copper. The contact 14 is connected to a connection portion 36 for connecting to a cable and the block 1.
2 and a connecting portion 4 connected to a counterpart
It consists of 0. The contact 14 is fixed to the contact insertion hole by press fitting or the like. In this embodiment, as shown in FIG. 2, the substrate is a surface mount type (SMT).
Type) is illustrated, but a dip type that is soldered to a substrate may be used.

Next, the washer screw 18 will be described.
The screw with washer 18 includes a washer 24, a male screw portion 28, and a screw head 26. The washer 24 is a separate component, but is not detached below the screw head 26 by banding or the like. This washer screw 18 is shown in FIG.
And inserted and fixed in the connection portion 16 of the independent space as shown in FIG. The washer screw 16 is screwed to a nut 34 as shown in FIG.
The threaded end of the screw with washer 18 is extended, and a recess 33 is provided in the extended portion. The recess 33 is a portion that engages with the projection 30 of the block 12. This recess 3
The position of the contact 14 is such that when the recess 33 of the screw 18 with the washer and the projection 30 of the block 12 are engaged with each other,
The cable is appropriately designed so that the cable enters the space between the washer 24 and the lower end of the washer 24. By delivering to customers with open space, man-hours for connection at customers are reduced. When connecting at the customer's site, tightening the screw with washer 18 causes the threaded portion to get over the protrusion 30 of the block 12 so as to cut it.

Finally, the nut 34 will be described. The nut 34 is inserted into the nut insertion hole 35 of the block 12 and the contact 14 is fixed to the block 12 so that the nut 34 does not come off the nut insertion hole 35 of the block 12.

[0014]

According to the present invention, the following remarkable effects can be obtained by adopting the above structure. (1) By providing the concave portion 33 at the distal end portion 31 of the screw 18 with the washer, the concave portion 33 can be more reliably positioned by engaging with the protruding portion 30, and a space for the cable to enter is secured. be able to. (2) The protrusion 30 is provided inside the insertion hole 32 of the block 12, and the recess 33 of the screw 18 with the washer can be easily positioned by engaging with the protrusion 30, and the space into which the cable can enter. Since the gap between the lower end of the washer 24 of the washer-equipped screw 18 and the contact is open at the time of delivery to the customer, no trouble is required when connecting the cable at the customer, and man-hours can be reduced. (3) By making the protruding portion 30 elastic, it is possible to cope with screwing the washer screw 18 several times. (4) Just screw the washer screw 18 with a screwdriver,
Since the projection 30 can be easily pierced and does not fall off, it is easy to manage parts.

[Brief description of the drawings]

FIG. 1 is a perspective view of a screw with a washer and a terminal block to which the screw is attached.

FIG. 2 is a longitudinal sectional view of the terminal block of the present invention.

FIG. 3 is a longitudinal sectional view of a conventional terminal block.

[Explanation of symbols]

 10, 50 Terminal block 12, 52 Block 14 Contact 16 Inside connection part 18 Screw with washer 20 Side wall 22 Female screw part 24 Washer 26 Screw head 28 Male screw part 30 Projection part 31 Tip part 32 Insertion hole 33 Depression 34 Nut 35 Insert nut Hole 36 connection part 38 fixing part 40 connection part

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5E012 BA12 5E086 CC03 CC22 CC27 CC28 CC43 DD05 DD09 DD12 DD34 HH01 HH20 LL10 LL16 5H004 GA40 MA58 5H220 BB20 CC02 JJ04

Claims (1)

[Claims] 1. A contact comprising a cable, a connection portion connected to the cable, a fixed portion fixed to the block, and a connection portion connected to a counterpart. In a terminal block including a block having a connection portion, a screw with a washer for contacting and fixing the cable to the contact, and a nut screwed with the screw with the washer, the screw with the washer is inserted. A protrusion is provided inside the insertion hole of the block, a tip of the screw with the washer is extended, a recess is provided for engaging the protrusion, and the contact and the washer are engaged when the protrusion is engaged with the recess. A terminal block, which is open between a lower end of the terminal and a terminal for inserting a cable.