JPH0729618A - Short-circuit signal input device for terminal block - Google Patents

Abstract

PURPOSE:To ensure that a short-circuit signal is input between adjacent terminals through a simple operation by pressing the ends of electrically conductive contact pieces into contact with the screws of the adjacent terminals, the contact pieces being mounted on the outsides of a pair of conductor pieces which is in a gripping position. CONSTITUTION:A pair of conductor pieces 1a, 1b have a journalled middle portion and are connected together in such a way as to freely open and close and to freely conduct, and one side of this journal portion 2 constitutes a grip (g) and the other side constitutes a holder (h). A coil spring 3 fitted around the journal portion 2 of the conductor pieces 1a, 1b presses the conductor pieces 1a, 1b of the grip (g) in a closing direction. The inside edges of the conductor pieces 1a, 1b are tootijed 4a, 4b for preventing slip, and insulating tubes 5a, 5b are fitted on the holder (h). Elastic, electrically conductive contact pieces 6a, 6b are mounted on the outsides of the grip (g) of the conductor pieces 1a, 1b, with the ends of the pieces 6a, 6b separated from each other, and contacts 7a, 7b are provided at the ends of the pieces 6a, 6b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a short signal input tool for terminal blocks.

[0002]

2. Description of the Related Art In a sequence control board or the like, when performing a sequence test or a shutdown test, a short circuit that simulates a predetermined contact input between adjacent terminals of a terminal block used for connecting input / output devices. A signal may be input.

Conventionally, for inputting such a short signal, for example, as shown in FIG. 4, an input tool c manufactured by soldering a clip b such as a crocodile or a beetle to both ends of a lead wire a is used.

That is, in such a short signal input tool c, as shown in FIG. 5, the clips b at both ends of the lead wire a are sandwiched between the heads of the screws d of the respective terminals to be fixed, whereby the terminal block is fixed. A short signal is input between the terminals f and f adjacent to e.

[0005]

Since the screw d provided on each terminal of the terminal block generally has a rounded head, it is easy to slip when sandwiched by the clip b, and the fixing operation is relatively troublesome. , In some cases, it may come off during the test, in which case it may be necessary to restart the test from the beginning. For example, a sequence having a timer such as purging causes a loss of about 30 minutes. The present invention aims to solve such problems.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a pair of conductor pieces are connected so as to be openable, closable, and conductive by pivotally supporting an intermediate portion, and one side with respect to the shaft portion is connected. With a holding part, the other side is an opening operation part, a spring for urging the holding part to the closed side is attached, and a slip stopper is formed on the inner edges of the pair of conductor pieces forming the holding part. We propose a short signal input tool for a terminal block, in which a conductive contact piece having elasticity is attached to the outside so that the tip end side is opened, and a pair of conductor pieces constituting the opening operation part are covered with an insulating coating.

[0007]

When the boundary plate between the adjacent terminals of the terminal block is sandwiched from the front side, the tips of the conductive contact pieces mounted on the outside of the pair of sandwiched conductive pieces are respectively screwed to the adjacent terminals. Press against.

Therefore, the terminals adjacent to each other are brought into conduction through the conductive contact piece and the conductor piece, so that a short signal can be input between these terminals.

[0009]

EXAMPLE An example of the present invention will be described with reference to FIGS. FIG. 1 shows an example of an input tool to which the present invention is applied. Reference numerals 1a and 1b are a pair of conductor pieces which are pivotally supported by an intermediate portion and are openably and closably connected. That is, the lower side in the drawing is configured as a holding section g, and the other side is configured as an opening operation section h. For this reason, the pair of conductor pieces 1a and 1b are fitted to the shaft portion 2 by the torsion coil springs 3 and the pair of conductor pieces 1 of the gripping portion g are provided.
A and 1b are urged in the closing direction. And the holding part g
Teeth 4a, 4b are formed on the inner edges of the pair of conductor pieces 1a, 1b constituting the above as slip stoppers, and the opening operation part h
Insulating tubes 5a and 5b are attached to the portions of the pair of conductor pieces 1a and 1b constituting the above.

Then, a pair of conductor pieces 1 constituting the holding portion g.
Conductive contact pieces 6a and 6b having elasticity are attached to the outer sides of the portions a and 1b such that the tip ends open, and contacts 7a and 7b are provided at the tips.

The input unit having the above construction can be constructed by using, for example, a crocodile clip, a contact for relay and an insulating tube for terminal. That is, the holding part side of the alligator clip is cut off to an appropriate length, the relay contact is fixed to the outside by soldering, etc., and the terminal insulating tube is attached to the opening operation side to easily configure. it can.

Reference numeral 8 is a terminal block, which is provided with a screw 9 corresponding to each terminal, and a boundary plate 10 is formed between adjacent terminals.

When performing a sequence test or a shutdown test of a control panel or the like with the above-mentioned input tool, when a short signal is input between adjacent contacts, the conductor piece 1a,
When the holding part g is opened by grasping the opening operation part h of 1b and is moved from the front side toward the terminal to release the opening operation part h, the holding part g
The conductor pieces 1a and 1b that form the element hold the boundary plate 10 between the adjacent terminals by the elastic force of the spring 3. In this state, as shown in FIGS. 2 and 3, the tip ends of the conductive contact pieces 6a, 6b on the outside of the grip portion g are opened and the contacts 7a, 7b elastically contact the upper side of the screw 9 of the terminal.

Therefore, the screws 9 and
The conductive contact pieces 6a, 6b and the conductor pieces 1a, 1b are brought into a conductive state, so that a short signal can be input between these terminals.

As described above, in the input tool according to the present invention, the boundary plate 10 between the adjacent terminals of the terminal block 8 is held and fixed by the elastic force of the spring 3 by the conductor pieces 1a and 1b forming the holding portion g. Therefore, the fixing operation and the removal operation are easy, and the teeth 4a, 4 are provided on the conductor pieces 1a, 1b forming the holding part g.
Since b is formed as a non-slip, it is very unlikely to come off.

[0016]

As described above, the present invention has the following effects when a short signal is input between the adjacent terminals of the terminal block. It can be securely attached and detached to and from the terminal block with one touch. It is very unlikely that it will come off during installation and will not come off during the test, so it is possible to prevent the loss of time for this.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an input tool of the present invention.

FIG. 2 is a perspective view showing a state in which the input tool shown in FIG. 1 is attached to a terminal block.

FIG. 3 is a side view of an essential part showing a mounted state of FIG.

FIG. 4 is a side view showing a conventional input tool.

5 is a perspective view showing a state in which the input tool shown in FIG. 4 is attached to a terminal block.

[Explanation of symbols]

1a, 1b Conductor piece 2 Shaft part 3 Torsional coil spring 4a, 4b Tooth (slip prevention) 5a, 5b Insulation tube (insulation coating) 6a, 6b Conductive contact point piece 7a, 7b Contact point 8 Terminal block 9 Screw 10 Boundary plate g Holding Part h Opening operation part

Claims (1)

[Claims] 1. A pair of conductor pieces are connected so that they can be opened, closed, and conducted freely with a middle portion pivotally supported so that one side with respect to the shaft portion serves as a holding portion, the other side serves as an opening operation portion, and the holding portion has a holding portion. A spring that urges the closed side is attached, a slip stopper is formed on the inner edge of the pair of conductor pieces that make up the holding part, and an elastic conductive contact piece is attached on the outside so that the tip side opens. A short signal input tool for a terminal block, characterized in that an insulating coating is applied to a pair of conductor pieces forming the opening operation section.