JPH0631744Y2 - Cable fixing mechanism - Google Patents

Description

[Detailed Description of the Invention] (i) Industrial field of application The present invention is a cable fixing mechanism in which a cable is inserted from an insertion opening formed in a case body, and the tip of the cable is clamped and fixed by a clamp fitting provided inside. Regarding

In the present invention, the cable is a generic term for a core wire such as a vinyl insulated wire and a cap tire cable, and an optical fiber cable.

(B) Conventional technology Conventionally, as a mechanism for fixing the cable end, a screw hole is provided in the terminal to connect the cable end, a screw washer is screwed into the screw hole, and a washer and a terminal surface are inserted into the screw. A method is known in which the end of the cable is clamped and fixed. Also, as one-touch operation,
It is known that, as in Japanese Utility Model Laid-Open No. 59-1547773 "Terminal Block," the tip of the cable is clamped and fixed by a clamp fitting composed of a terminal plate and other parts when the lever handle is tilted.

(C) Problems to be solved by the invention With the conventional mechanism that uses screws, the screw must be rotated many times with a screwdriver or the like to screw it in, and it takes time to install and workability is poor. The work space required for the work must be secured above. Further, since the screw is used to tighten and fix it through the washer, in the case of a thin cable, there is a risk of cutting.

On the other hand, in the case of raising and lowering the lever handle, one lever handle is required for one cable,
It was technically difficult to individually fix many cables in a limited space. Also, if multiple activators are provided on one shaft and multiple cables are fixed at once by rotating the shafts, it is extremely difficult to fix all cables simultaneously and reliably. there were.

The present invention is a fixing mechanism capable of individually fixing a plurality of cables by rotating a single camshaft. The cable insertion hole is formed in a straight line, and the metal fitting chamber is provided at each part corresponding to the inward extension of the cable insertion hole, and the cam chamber is connected to the side of the metal fitting chamber. The metal fitting in which the spring material is bent in a U shape is housed in a posture in which the opening portion faces the insertion hole side and the side surface faces the cam chamber, and the cable insertion holes are arranged in the cam chamber. A single cam shaft is arranged in parallel with, and a plurality of cams projectingly provided on the circumferential surface of the cam shaft integrally rotate at a predetermined interval in the axial direction of the cam shaft by the turning operation of the cam shaft, Push the side of each of the clamps Further, it is configured to operate, and in at least one of the plurality of cams, the projecting position of the pressing operation start side with respect to the sandwiching metal is shifted with respect to the other cam, and viewed from the camshaft axial direction. Sometimes, the protruding portion that is pressed against the sandwiching metal is formed so as to overlap with another cam at least partially.

E action By rotating the cam shaft, the protruding cams rotate integrally and press the side surface of each U-shaped clamp, so that the opening of the clamp can be opened from the cable insertion hole. The cable tip inserted into the inside can be firmly clamped and fixed.

In addition, since the protruding position of the pressing operation start side of the specific cam among the plurality of cams is shifted relative to the other cams, the timing for starting the pressing of the specific fitting of the specific cam Is different from the timing at which the pressing of other cams is started, and therefore, a plurality of cables can be fixed stepwise and individually.

When removing the cables, if the camshaft is rotated in the opposite direction, the pressing of the clamps by the cams will be released in the reverse order when they were fixed, and each clamp will open due to the elastic action. Can be canceled individually.

F. Embodiment An embodiment of the present invention will be described with reference to the drawings.

The drawings show a controller 1 having a fixing mechanism according to the present invention. The controller 1 has a box-shaped case body 2 made of synthetic resin and a built-in amplifier circuit section of an amplifier-separated sensor. The case body 2 is attached with the dustproof lid 3 made of transparent synthetic resin via a synthetic resin packing (not shown).

The upper surface and one side surface of the case body 2 are continuously and diagonally opened to a large extent, and DIN rail locking members 4a and 4b are provided on the rear surface so as to be opposed to each other so that they can be attached to a 35 mm DIN rail. There is. An insertion port (not shown) for inserting an electric cable for supplying power and outputting an electric signal to the outside is formed on the other side surface.
Further, locking projections 5a and 5b are formed on the upper side of one side and the lower side of the other side of the case main body 2 so that the cover 3 can be attached to the case main body 2. A fitting body 6a that fits with the locking projection 5a formed on the upper portion at a position corresponding to the locking projections 5a and 5b,
Locking claw 6 that locks to the locking projection 6b formed at the bottom
b and are provided.

An assembly block 7 made of a synthetic resin is housed in the case body 2, and the assembly block 7 is integrated with an inverted L-shaped block body 7a and a side surface of the block body 7a. And an I-shaped block piece 7b connected to

On the upper side of the block body 7a, a switch 8 for signal output display and stable operation display, two LEDs 9, 9 and semi-fixed type volume controls 10, 10 for adjusting the sensitivity of the sensor are flush with the block body surface. The film substrate 11 on which electronic parts such as ICs are mounted is assembled in a rolled state in the lower space surrounded by the L-shape. In addition, in the block body 7a,
On the coupling side of the block piece 7b, metal fitting chambers 13a, 13b, 13c, 13d for accommodating the metal fittings 12a, 12b, 12c, 12d, which are spring materials for holding the ends of the cables, are formed in a line in the longitudinal direction. The metal fitting room 13a, 13
The inner sides of b, 13c, and 13d communicate with the opposite surface through a through hole. On the other hand, the block piece 7b is connected to the block main body 7a in a state where the metal fitting chambers 13a, 13b, 13c, 1
Insertion holes 14a, 14 for inserting cables which communicate with 3d
b, 14c, 14d are drilled, and the block body 7a is further provided.
With the block piece 7b and the block piece 7b joined together, a lever handle 16 projecting from the tip of the cam shaft 15 is projected upward on the joining surface along the axis parallel to the row of the metal fitting chambers. The semicircular concave surfaces 17, 17 ... serving as bearings for supporting the through holes and the camshaft 15, and the camshaft 1.
The cam chambers 19, 19 ... For accommodating the cams 18a, 18b, 18c, 18d provided on the No. 5 so as to be able to press the clamping metal fittings in the metal fitting compartment, respectively. The clamping metal fittings 12a, 12b, 12c, 12d are made of a strip-shaped spring material.
It is bent in a V shape and has a shape in which both sides of the front opening are opened in a V shape, and a connection terminal is provided so as to project rearward.

A cam shaft 15 is provided at a connecting portion of the block body 7 composed of the block body 7a and the block piece 7b with a lever handle 16 provided at a tip end thereof protruding upward, and the holding metal fittings 12a, 12b, 12c. , 12d, the film substrate 11, the power switch 8, the LED 9, and the semi-fixed volume 10 are electrically connected by direct soldering or via lead wires.

Cams 18a, 18 provided on the camshaft 15
The b, 18c, and 18d press the clamping metal fittings 12a, 12b, 12c, and 12d by the rotation of the cam shaft 15 to clamp the inserted cables, respectively.
Among these, the cams 18a and 18b, and 18c and 18d are combinations of the same shape, and the cams of each set start pressing the sandwiching metal fitting at different timings when the cam shaft is rotated. . The cam 18b and the cam 18c will be described with reference to FIG. 4a, FIG. 5a, and FIG. 6a, which show the state of the second cam from the top of the camshaft 15 in a horizontal cross section. If so, first both cams 1
When the holding metal fittings 12b and 12c corresponding to 8b and 18c are opened, only the cam 18c is in contact with the metal fitting 12c as shown in FIG. 4a, and both the cams 18b and 18c are
No pressing force is applied to the clamps 12b and 12c. Here, when the lever handle 16 is rotated one step, the cam 18
Although c presses the holding metal fitting 12c and closes the holding portion of the holding metal fitting 12c, the cam 18b only contacts the holding metal fitting 12b and does not press it. When the lever handle 16 is further rotated, both the cams 18b and 18c are held by the holding metal fitting 12.
When b and 12c are pressed, the sandwiching parts are closed.

FIGS. 4b, 5b, and 6b show the positions of the lever handle 15 corresponding to FIGS. 4a, 5a, and 6a, respectively.

To fix multiple cables to the controller formed in this way, first insert two of the four cables into the two lower insertion ports and insert the tips into the clamps. , Rotate the lever handle one step to securely fix the two (state shown in FIG. 5a). Next, insert the remaining two cables into the upper two insertion holes, insert the tip into the holding metal fitting as described above, and rotate the lever handle one more step to fix the two cables. 6 state shown in FIG. Then, the cover is put on the case to complete the fixing work. To release this fixation,
By rotating the lever handle in the opposite direction to the fixing operation, the lever handle is released in the reverse order.

In addition, although the controller of the amplifier-separated sensor is described in the present embodiment, the present invention is not limited to this embodiment, and the controller of FIGS.
As shown in FIG. B, it can be used for a detection switch or a detector, and a plurality of cables or optical fiber cables can be configured to be inserted and fixed through the insertion holes 14, 14 ... It can also be used for fixing a coaxial cable.

Further, in the present embodiment, two pairs are fixed one by one, but they may be fixed one by one, or fixed and released alternately.

In the controller of the present embodiment, when a camshaft made of the same material and made of synthetic resin is used, one camshaft is used.
It has been confirmed that fixing the book cable can be done without any problems, and if the material, camshaft diameter, etc. are changed,
More cables can be fixed with the book camshaft.

Advantages By using the fixing mechanism of the present invention, it is possible to fix two or more cables individually by operating one camshaft, and securely fix one or one group of cables before The cable of can be fixed.

Therefore, if several cams are provided on the cam shaft so that each cam presses the sandwich metal fitting at different timings when the cam shaft is rotated, a wide space for fixing operation is required. Many cables can be fixed individually without having to.

Further, when releasing the cable, the fixed state of the cable can be easily released by simply rotating the cam shaft in the reverse direction in the reverse order of the fixed state.

In addition, the number of parts can be reduced and the size can be reduced as compared with the conventional cable fixing mechanism.

[Brief description of drawings]

The drawings show the fixing mechanism of the present invention. Fig. 1 is an exploded view of a controller according to the present invention, Fig. 2 is an assembly view of the same, and Fig. 3 shows the relationship between a camshaft and a clamp. Explanatory drawing shown, 4 a, b, 5 a, b, 6 a, b are explanatory drawings of the same action, and 7 a, b are explanatory views of a modified embodiment. 1 ... Controller, 2 ... Case body, 3 ... Lid,
4a, 4b ... DIN rail locking member, 5a, 5b ...
Locking protrusion, 6a ... Fitting body, 6b ... Locking claw, 7 ... Assembly block, 7a ... Block body, 7b ... Block piece, 8 ... Switch, 9 ... LED, 10 ... Semi-fixed Mold volume, 11 ... Film substrate, 12a, 12
b, 12c, 12d ... Clamping hardware, 13a, 13b, 1
3c, 13d ... Metal fitting chamber, 14, 14a, 14b, 14
c, 14d ... insertion hole, 15 ... cam shaft, 16 ...
... Lever handle, 17 ... Concave surface, 18a, 18b, 1
8c, 18d ... cam, 19 ... cam chamber.

Claims (1)

[Scope of utility model registration request] 1. A plurality of cable insertion holes are formed in a straight line on a side surface of a case, and a metal fitting chamber is provided at each portion corresponding to an inward extension of the cable insertion hole, and a cam chamber is provided at a side of the metal fitting chamber. And a clamping metal fitting in which a strip-shaped spring material is bent in a U shape is housed in the metal fitting chamber with its opening facing the insertion hole and the side face facing the cam chamber. At the same time, one cam shaft is arranged in the cam chamber in parallel with the arrangement of the cable insertion holes, and the rotation of the cam shaft causes the cam shaft to project at a predetermined interval in the axial direction of the cam shaft. A plurality of cams provided are integrally rotated to press the side surfaces of each of the sandwich metal fittings, and at least one of the plurality of cams has a pressing operation start side with respect to the sandwich metal fittings. The protruding position of the other cam Shifting, and, cable securing mechanism projecting portion for pressing operation with respect clamped fitting when viewed from the camshaft axis direction is formed so as to overlap each other at least in part with other cams.