JPH0739178Y2 - Cable connection structure for electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a structure for connecting a cable to a connected block of an electric device such as a distance sensor, a photoelectric switch, a sequencer or the like.

[Conventional technology]

FIG. 4 and FIG. 5 are perspective views showing examples of conventional cable connection structures, respectively.

The example of FIG. 4 is called a connector system, in which a connector 4 is attached to the tip of a cable 3, a connector 5 forming a pair with this connector 4 is provided in the connected block 1, and the connector 4 is connected to the connector 5. The cable 3 is connected to the block 1 to be connected by being inserted. Another block 2 is connected to the other end of the cable 3 in this example.

For example, in the case of a distance sensor, the connected block 1 and the block 2 are an amplifier section and a sensor head, respectively.

The example of FIG. 5 is called a terminal block system, and the terminal block 6 is provided on the block 1 to be connected, and the cable 3 is directly connected to this.

[Problems to be solved by the device]

However, in the above connector system, the connectors 4, 5
Since the cable 3 is used, the connection of the cable 3 is easy, but there is a problem that the length of the cable 3 cannot be adjusted at the customer or the like.

This is because the core wire of the cable 3 is connected to the inside of the connector 4 by soldering or the like, and usually waterproof treatment is applied. Therefore, it is realistic to change the connection after once connecting it in a factory or the like. Is almost impossible.

On the other hand, in the above terminal block system, since the terminal block 6 is used, the length of the cable 3 can be adjusted. However, when the connected block 1 is replaced due to an abnormal condition, the cable at the terminal block 6 is changed. Since a large number of core wires of No. 3 must be removed or attached, there is a problem that it takes time and there is a possibility of incorrect wiring.

Therefore, the present invention mainly provides a cable connection structure in which the length of the cable can be adjusted at the customer or the like, and when the connected block is replaced, the replacement is easy and there is no fear of miswiring. To aim.

[Outline of device]

In order to achieve the above object, the cable connecting structure of the present invention has a cable fixing portion 33 for inserting and fixing a cable and a terminal block for connecting the cable as shown in FIG. 1, for example.
A connector block 30 having 39 and a connector 38 electrically connected to the terminal block 39 is prepared, the cable 3 is connected and fixed to the connector block 30, and the connector block 30 is attached to and detached from the connected block 10. A recess 12 that can be fitted,
The connector on the connector block 30 side in the recess 12
38 and a connector 16 forming a pair are provided, and the connector block 30 is fitted into the recess 12 of the connected side block 10 to electrically connect the connectors 16 and 38 to each other. To do.

According to the above structure, since the connector block 30 is provided with the terminal block 39, the length of the cable 3 can be adjusted at the customer or the like.

Further, since the connector block 30 can be attached to and detached from the connected block 10 in the same manner as a normal connector, when the connected block 10 needs to be replaced, the replacement is easy and there is no fear of incorrect wiring. .

[Embodiment] A more specific example of the cable connection structure described in FIG. 1 is shown in FIGS. 2 and 3.

The connector block 30 is made of, for example, an insulating material and has a square box-shaped case 31 having a front opening. A cable insertion hole 32 is provided in the center thereof, and a cable fixing portion 33 having the following structure is provided therein.

That is, the cylindrical male screw portion 35 is projected from the portion of the cable insertion hole 32 to the outside, and the cable 3 and the cable holder 36 are passed therethrough, and the holder cap 37 is tightened from the outside to fix the cable 3.

When a waterproof structure is provided between the cable 3 and the connector block 30, as in this example, a packing (for example, an O-ring) that is sandwiched between the cable holder 36 and the bottom surface of the male screw portion 35 is provided. ) 34, which may provide a seal between the cable 3 and the connector block 30.

In the case 31, in this example, two terminal blocks 39 for connecting the cable 3 (more specifically, the core wire 3a) are provided on the upper and lower sides (in FIG. 2 and FIG. 3) of the case 31. .

Each terminal block 39 is a multi-pole type in this example, and the fixing bracket 40,
A plurality of terminals each having a movable metal fitting 41 for sandwiching the core wire 3a of the cable 3 and a screw 42 for fastening the movable metal fitting 41 are provided between them.

In addition, in the case 31, in this example, the left and right sides of the bottom (third part
On both sides (in the figure) two multipole connectors 38 are provided. This connector 38 may be either male or female as long as it basically forms a set with the connector 16 on the connected side block 10 side described later, but it is preferable to use a female connector as in this example, This eliminates the risk of accidentally bending the contact when connecting the cable 3.

Further, a printed circuit board 43 is provided at the bottom of the case 31, whereby each terminal of each terminal block 39 (more specifically, its fixing metal fitting 40) and each contact of each connector 38 are respectively connected. It is electrically connected.

In addition, in order to mechanically lock the connector block 30 to the connected block 10, the cross section U is formed on the upper and lower portions of the case 31.
Engagement pieces 45 each having a character shape and having elasticity are provided, and small protrusions 44 are provided on an outer surface portion of each engagement piece 45.

Then, the cable 3 is passed through the connector block 30 and fixed by the cable fixing portion 33, and each core wire
3a are connected to the terminal blocks 39, respectively.

On the other hand, the block 10 to be connected has, for example, a rectangular box-shaped case 11 made of an insulating material, and is provided in the front portion thereof.
The recess 12 into which the connector block 30 is detachably fitted
Is provided.

Further, on the bottom surface of the recess 12, a multipolar connector (male connector) that is paired with the connector 38 on the connector block 30 side is formed.
Is provided. 17 is the pin contact, 15
Is a mount for this connector 16.

In this example, the connector 16 is provided with a female connector 18
Is provided, and is connected to an electric circuit (not shown) in the connected block 10 via this.

In addition, the connector block 30 is provided above and below the entrance of the case 11.
The small holes 14 that engage with the small protrusions 44 of the engaging pieces 45 are provided respectively.

When a waterproof structure is provided between the connector block 30 and the block 10 to be connected, as in this example, a packing that is sandwiched between the connector block 30 and the connector block 30 that is fitted around the bottom surface of the recess 12. (For example, an O-ring) 13 may be provided to seal between the connected block 10 and the connector block 30.

Since the structure is as described above, as shown in FIG. 2, when the connector block 30 is fitted into the recess 12 of the block 10 to be connected, both are fitted and mechanically fixed, and at the same time, the connectors of both are connected. 16, 38 are electrically connected to each other. Further, in this example, the small projections 44 of the engaging pieces 45 of the connector block 30 are engaged with the small holes 14 of the block 10 to be connected and mechanically locked, and the connector block 30 is prevented from undesirably coming off.

Moreover, according to such a cable connection structure, since the connector block 30 is provided with the terminal block 39, when it is necessary to adjust the length of the cable 3 at the customer or the like, for example, the cable 3 is cut and the cable is cut. It is only necessary to fix it again with the fixing portion 33 and reconnect the core wire 3a to the terminal block 39, so that the length of the cable 3 can be easily adjusted.

Further, the connector block 30 can be attached / detached to / from the connected block 10 with one touch like a normal connector, so when replacing the connected block 10 due to an abnormality, pull out the connector block 30 from it. It suffices to insert it again into a new block 10 to be connected. Therefore, replacement of the block 10 to be connected is easy, and since it is a connector system, there is no fear of incorrect wiring.

When the connected block 10 is the amplifier section of the distance sensor as described above, a sensor head block may be fitted in the recess 12 instead of the connector block 30. An amplifier-separated type distance sensor and an amplifier-incorporated type distance sensor can be manufactured using the amplifier unit.

[Effect of device]

As described above, according to the cable connection structure of the present invention, since the connector block is provided with the terminal block, the length of the cable can be adjusted at the customer or the like.

Further, since the connector block can be attached to and detached from the connected block in the same manner as an ordinary connector, when the connected block needs to be replaced, the replacement is easy and there is no fear of incorrect wiring.

Further, as described above, if the packing is provided in each of the cable fixing portion of the connector block and the concave portion of the connected block, the waterproof structure can be easily obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of a cable connection structure according to the present invention. FIG. 2 is a sectional view showing a more specific embodiment of the cable connection structure according to the present invention. Third
The figure is a front view of the connector block in FIG. FIG. 4 and FIG. 5 are perspective views showing examples of conventional cable connection structures, respectively. 3 ... Cable, 10 ... Connected side block, 12 ... Recess, 13 ... Packing, 16 ... Connector, 30 ... Connector block, 33 ... Cable fixing part, 34 ... Packing, 38
...... Connector, 39 ...... Terminal block.

Claims (2)

[Scope of utility model registration request] 1. A structure for connecting a cable to a connected block of an electric device, wherein a cable fixing portion for inserting and fixing the cable, a terminal block for connecting the cable, and an electrical connection for the terminal block. Prepare a connector block having the connector and fixed the cable to it,
In addition, the connection-side block is provided with a recess into which the connector block is removably fitted, and a connector that forms a pair with the connector on the connector block side in the recess, and the connector is provided in the recess of the connection-side block. A cable connection structure for an electric device, characterized in that both connectors are electrically connected by inserting a block. 2. A packing for sealing between the connector block and the cable is provided in the cable fixing portion of the connector block, and the connected block and the connector block are provided in the recess of the connected block. The cable connection structure for an electric device according to claim 1, further comprising a packing that seals the space.