JPH037979Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention The present invention relates to a cable duct for a rack device in a communication device, etc., and particularly relates to its structure.

(b) Background of the technology In general, a plurality of shelfs containing a plurality of printed boards are mounted in an integrated large box-shaped frame, and the whole frame constitutes one frame. The printed board is usually inserted into the shelf from the front of the shelf along guide rails provided in the shelf, and the rear end of the printed board is electrically and mechanically connected to the backboard of the shelf via a connector. be combined. However, in such a printed board, a connector is also provided at the front end of the printed board, and a cable may be detachably connected from the front side of the printed board via this connector. In such cases, a cable duct extending in the left-right direction is often provided along the lower edge of the front surface of the shelf opening to house and lay the cables. This type of cable duct usually consists of a duct body for storing and laying cables, and a duct cover superimposed on the duct body. In addition, in this type of rack equipment, in order to change its electrical function, etc., it is necessary to convert the printed board (replace it with another printed board with a different function), add or reduce the number of printed boards, change the layout of the printed board, etc. Alternatively, operations such as insertion and removal of printed boards may be performed for maintenance purposes.
In such a case, the cables also need to be added, reduced, or rearranged to accommodate these printed boards. Therefore, this kind of cable duct is
The simple structure makes it easy to attach and remove the duct cover, and when changing the layout of the printed circuit board as mentioned above, the cable outlet location can be easily changed, and the cable can be stored so that it does not get in the way when inserting or removing the printed board. It is desirable to have a structure that allows installation.

(c) Prior Art and Problems Figures 1 to 3 are diagrams for explaining this type of conventional cable duct. Figure 1 is a perspective view of the cable duct 10 disposed along the lower edge of the front surface of the shelf opening (with the duct cover 12 removed), and Figure 2 is the cable duct seen from the direction of arrow A in Figure 1. 10 (with the duct cover 12 attached), and FIG. 3 is a side view of the cable duct 20 in a second conventional example.

1 and 2, reference numeral 10 indicates the entire cable duct, 11 is the duct body, 12 is the duct cover, 13 is the set screw, 14 is the shield,
Reference numeral 15 indicates a printed board, and 16 indicates a cable. In addition, in FIG. 1, when looking at the drawing, it is assumed that the left hand side is the front side of the shelf 14 and the cable duct 10, and the right hand side is the rear side, and when looking from the front side to the rear side, the left hand side is the left side, The right hand side is assumed to be the right side, and the same applies to all the figures below. A plurality of printed boards 15 are inserted into the shelf 14 from the front side of the opening 14a. The rear end of the printed board 15 is electrically and mechanically connected to a backboard (not shown) of the shelf 14 via a connector (not shown). A connector 15a (only a portion is shown as a representative) is also provided at the front end of the printed board 15,
Connector 16a of cable 16 is connected to this. The cable duct 10 includes a duct body 11,
It is composed of a duct cover 12 and a set screw 13. In this case, the duct body 11 is the shield 14
The opening 14a is arranged in the left-right direction along the lower front edge of the opening 14a, and is fixed to the shelf 14 by a fixing fitting 17. In addition, the duct body 11 is a shield 14
In some cases, it is attached to the side of the frame (not shown) that houses the. Now, as shown in the drawing, the duct main body 11 has a deformed U-shaped cross section. An elongated cut groove 11b for inserting the cable 16 is formed in the upper wall 11a, and the lower wall 1
A cover fixing part 11d, which is bent into an inverted V shape, is provided at the front end of the cover 1c. Screw holes 11e are provided on the left and right sides of the front end of the fixing portion 11d. The duct cover 12 is formed to have a shaped cross section, and has an elongated cut groove 12c extending from the rear end of the upper wall 12a to the front side wall 12b corresponding to the cut groove 11b of the duct body 11, and has a cut groove 12c in the front side wall. 12b is provided with an insertion hole 12d for the set screw 13. The cable 16 connects to the duct body 1
A connector 16a introduced into the connector 1, pulled out from the cut groove 11b, and connected to the tip thereof is detachably connected to the connector 15a of the printed board 15.
Now, the upper wall 12a of the duct cover 12 is moved from the front and placed on the upper wall 11a of the duct main body, and the cut groove 12c is inserted into the cut groove 11 of the duct main body.
b, and is fastened to the duct body 11 with the set screw 13, as shown in FIG. However, this conventional cable duct 10 has the following problems.

Tool (screwdriver) for installing the duct cover 12
The installation work is complicated.

Even when 161 cables are added, removed, or rearranged, it is necessary to remove the set screws 13, remove the duct cover 12, and temporarily place them in another location each time. This requires a lot of man-hours, and the set screw 13, which is a small part, is easily lost.

Since a part of the internal space of the duct main body 11 is occupied by the inverted V-shaped cover fixing part 11d, the utilization rate of the internal space is low, and as a result, the cross-sectional shape becomes large in the front-rear direction.

The order in which the cable 16 is laid is restricted after the printed board 15 is inserted (if the cable 16 is laid first, the cable 16 will get in the way, making it difficult to insert the printed board 15).

Next, a cable duct 20 of a second conventional example shown in FIG. 3 has basically the same structure as the above-mentioned conventional example (FIGS. 1 and 2). In this case, as shown in the figure, the front side wall 2 is attached to the duct body 21.
A mounting bracket 23 is fixed to the lower surface of the front end of the bottom wall 21b, and the front side wall 22a of the duct cover 22 is fastened to the bracket 23 with a set screw 13. The work for attaching the duct cover 22 is carried out in the same manner as in the prior art example (FIGS. 1 and 2). However, although this cable duct 20 has the advantage of being able to effectively utilize the internal space of the duct body 21, it is formed in an unfavorable cross-sectional shape in that the mounting bracket 23 protrudes below the duct body 21. For this reason, this cable duct 20 has a problem of being enlarged in the vertical direction, and other than that, the cable duct 20 has the problem of being enlarged in the vertical direction.
It has almost the same problem as the one shown in Figure).

(d) Purpose of the invention In view of the problems of the prior art described above, the purpose of the invention is to have a simple structure, to easily attach and detach the duct cover without the need for installation tools, and to easily change the cable arrangement. Another object of the present invention is to provide a cable duct for a rack device in a communication device or the like that can eliminate restrictions on the order of cable installation.

(e) Structure of the invention In order to achieve this object, according to the invention, a shelf is arranged on the left and right sides along the lower edge of the front opening of a shelf that accommodates a plurality of printed boards and is arranged in a frame. A cable duct for accommodating and laying a cable extending in the direction and detachably connected to the front end of the printed board, the cable duct comprising a duct body and a duct superimposed on the body. The duct main body has a cross-sectional shape in which the center part of the upper wall of the hollow cylinder is cut out in the shape of a long groove along the longitudinal direction, and an elongated hole extending from the front upper wall to the front side wall of the main body. A plurality of cut grooves for cable insertion in the form of a shape are provided at predetermined intervals, and a coupling protrusion is provided on the upper surface of one end in the left-right direction of the upper wall, and the duct cover is connected to the upper wall and the front extending downward from the front end of the upper wall. An elongated cut groove for cable insertion extending from the front side wall to the upper wall of the cover is formed in a cross-sectional shape having a wall, and is provided in correspondence with and aligned with the cut groove of the duct body, and is provided on the left and right sides of the upper wall. An engagement hole for engaging with the engagement protrusion of the duct body is provided at one end in the direction, and an engaging part for engaging with the other end of the duct body upper wall is provided at the other end, and the duct cover At least one locking member is provided on the lower surface of the upper wall of the duct cover for clamping the upper wall of the duct body in cooperation with the lower surface of the wall, and the locking member is made of an elastic plate and is configured to clamp the upper wall of the duct body. Width that can fit into the cut groove for cable insertion, and length that allows the front and rear upper walls of the duct body to be sandwiched between the front and rear ends, which are fixed to the duct cover at the center in the front-rear direction and are in a free state, and the lower surface of the upper wall of the duct cover. Provided is a cable duct for a rack device in a communication device, etc., which is characterized by having a cable duct.

(F) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail based on the drawings.

FIGS. 4 to 10 are diagrams for explaining embodiments of the present invention. In these figures, the same parts as those shown in FIGS. 1 to 3 above are given the same reference numerals.

FIG. 4 is a perspective view showing a state in which a cable duct 40 according to the present invention is arranged on a frame 31. In the figure, reference numeral 30 indicates the entire racking device, 31 indicates the frame, and 40 indicates the cable duct of the present invention. A plurality of shelves 14 each containing a plurality of printed boards 15 are housed in a rack frame 31 to form one rack device 30. Each shield 14
Cable ducts 40 are disposed extending in the left-right direction along the lower front edge of the opening 14a. The cable duct 40 includes a duct body 41,
It is composed of a duct cover 42 which is superimposed and placed and fixed on the duct main body 41. The cable 16 housed and installed within the cable duct 40 is
Elongated cable insertion grooves 4 provided in the duct body 41 and the duct cover 42 in alignment with each other.
The tips of cables 16 (only the left and right ends are shown as representatives) are pulled out from 1d and 42c, and the tips are connected to the corresponding printed boards 15 via connectors 16a and 15a, respectively.

Figure 5 shows the cable duct 40 in Figure 4 (with the duct cover 42 removed) and the shield 14.
FIG. As shown in the figure, the duct body 41 is fixed to the shelf 14 via a fixing fitting 17. Note that the duct main body 41 may be attached to the frame 31 (FIG. 4) side as in the conventional example described above. Now, as shown in the drawing, the duct body 41 has a cross-sectional shape. That is, the upper wall is composed of a front upper wall 41a and a rear upper wall 41b, which are divided into front and rear parts by having a long groove-shaped notch in the center along the longitudinal direction. And the duct body 4
1, a plurality of elongated cable insertion grooves 41d extending from the front upper wall 41a to the front side wall 41c are formed at predetermined intervals, and the front upper wall 41
Engaging protrusions (dowels) 41e are formed on the upper surfaces of the right end sides of the rear upper wall 41b and the rear upper wall 41b, respectively. still,
The duct body 41 is often formed from a thin iron plate by press working, but may also be formed from a resin material. The duct cover 42 has a shaped cross section, and has an elongated cable insertion groove 42c extending from the front side wall 42b to the upper wall 42a.
It corresponds to and is formed in a consistent manner. The duct main body 4 is located on the right end side of the upper wall 42a.
Engagement hole 42 for engaging with engagement protrusion 41e of No. 1
d is provided to pass through. On the other hand, the upper wall 42a
On the left end side, the duct main body upper walls 41a, 41
An engaging portion 42e is provided for engaging with the left end portion of b. The engaging portion 42e is formed by folding back the left end of the upper wall 42a, and is formed integrally with the upper wall 42a (see FIGS. 7 and 8). moreover,
A locking member 43 is fixedly provided on the lower surface of the upper wall 42a near the engagement hole 42d and at the center. The locking member 43 is formed from an elastic iron plate (resin-based material may be used) and has a long planar shape, as shown in FIG. 6A, and its cross-sectional shape is shown in FIG. 6B. As shown in FIG.
It is formed to have. This gap G
A locking member 43 is provided to clamp the upper walls 41a and 41b of the duct body in cooperation with the lower surface of the upper wall 42a of the duct cover (see FIG. 9). Note that the number of locking members 43 to be attached can be arbitrarily set as required, but it is preferable that at least one locking member 43 be installed near the engagement hole 42d.

When storing and installing the cables 16 in the cable duct, as shown in FIG. The duct cover 42 is pulled out from the cut groove 41d, and then the duct cover 42 is attached to the duct body 42.
Install on top. Subsequently, the connector 16a of the cable 16 is connected to the connector 15a of the printed circuit board 15, thereby completing the wiring of the cable 16. In this way, when installing the cable 16, the tip of the cable 16 can be hung down from the cut groove 41d of the front side wall 41c of the duct main body, so that even after the cable 16 is installed, it will not be disturbed by the cable 16. The printed board 15 can be easily inserted into the shelf 14 without any trouble. That is, the cable 16 can be laid in the duct main body 41 in advance before the printed board 15 is inserted, that is, the cable 16 can be pre-flowed. Therefore, according to this embodiment, the cable 16
The storage installation work can be carried out as desired, either before or after the printed board 15 is inserted.

Now, the duct cover 42 can be easily attached to the duct body 41 by the following procedure.
First, as shown in FIG. 7, the duct cover 42
is placed on the duct body 41 with a slight shift to the left (direction of arrow C in FIG. 5) with respect to the duct body 41 so that the locking member 43 enters the cut groove 41d of the duct body, Slide it from the front to the rear. Next, the duct cover upper wall 42
The rear upper wall 4 of the duct main body
1b, and also insert the duct cover front side wall 42b (see FIG. 5) into the duct main body front side wall 41.
c (see Figure 5). Thereafter, when the duct cover 42 is slid to the right (in the direction of arrow D in FIG. 7), a gap G is formed between the lower front end of the duct cover upper wall 42a and the front end of the locking member 43 (see FIG. 6 B). At the same time, when the duct body front upper wall 41a is fitted into the duct body front upper wall 41a, the duct body upper wall 41a, 41 is inserted into the engaging part 42e formed at the left end of the duct cover 42.
The left end of b is inserted. Thereby, the duct cover 42 is attached to the duct main body 41 in the vertical direction.
Fixed. When the duct cover 42 is further slid to the right, the right end of the cover 42 comes into contact with the engagement protrusion 41e, and then elastically deforms and rides on the protrusion 41e, and the right end of the cover 42 is disposed on the right end of the cover 42. When the engagement hole 42d reaches the engagement protrusion 41e, it returns to its original position due to elastic restoring force. As a result, the engagement hole 42d and the engagement protrusion 41e are automatically engaged, and the duct cover 42 is fixed to the duct main body 4 in the left and right direction as well, as shown in FIG.
Fixed to 1. Incidentally, when removing the duct cover 42, it can be easily removed by performing the operation opposite to the above-mentioned operation. In this way, the duct cover 42
can be easily attached to and detached from the duct main body 41 by only moving in the front-back and left-right directions without requiring any installation tools.

FIG. 9 is a side view seen from the direction of arrow E in FIG. 8. As can be easily inferred from the figure, the cable duct 40 of this embodiment can utilize the internal space of the duct main body 41 sufficiently effectively, and has an extremely compact structure without any protruding parts.

FIG. 10 shows the duct cover 42 in FIG.
It is a figure which shows the state which removed. in this way,
The cable 16 can be rearranged while the duct cover 42 is removed, rotated vertically, and placed on the duct body 41. That is, since there is no need to take the trouble to move and place the removed duct cover 42 in another location, work such as changing the cable arrangement can be performed easily and quickly.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, as shown in FIG. It is not limited to a square shape, but can be formed into a semicircular shape, for example, and other modifications can be applied without departing from the gist of the present invention.

(g) Effects of the invention As explained above in detail, the cable duct of the rack device for communication equipment, etc. according to the invention has an engaging protrusion on the upper wall of the duct body, and the duct cover is attached vertically to the duct body. The duct cover is provided with a locking member, an engaging hole, and an engaging part that fixes the cable in the left and right directions, and by skillfully utilizing the upper wall of the duct body and the cut groove for cable insertion, the structure is simple.
The duct cover can be easily attached to and detached from the duct body by moving it in two directions, front and back and left and right, without the need for installation tools, and cables can be stored and laid before or after the printed board insertion process. This has the great effect of reducing the number of man-hours required for cable installation, rearrangement, etc.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional cable duct placed along the lower edge of the front surface of the shelf opening (with the duct cover removed), and Figure 2 is a cable duct viewed from the direction of arrow A in Figure 1. 3 is a side view of the cable duct in the second conventional example, and FIG. 4 is a side view of the cable duct 40 of the present invention installed in the frame. 5 is a perspective view of the cable duct 40 in FIG. 4 (with the duct cover 42 removed) and the shield 14, and FIG. 6 is a perspective view of the cable duct 40 in FIG.
7 is a standalone view of the locking member 43 in the figure, A is a plan view, B is a side view seen from the direction of arrow F in A, and FIG.
FIG. 8 is a front view of the cable duct 40 showing a state in which the duct cover 42 of FIG. 7 is completely attached to the duct body 41; Figure 9 is the 8th
A side view seen from the direction of arrow E in the figure, Figure 10 is the 9th
FIG. 4 is a side view showing a state in which the duct cover 42 shown in the figure is removed. 14...shelf, 14a...opening of shelf 14, 15...printed board, 15a...connector provided at the front end of printed board 15, 16...cable, 16a...connector connected to the tip of cable 16, 30... Frame device, 31... Frame, 4
0...Cable duct of the present invention, 41...Duct body, 41a...Front upper wall, 41b...Rear upper wall, 41c...Front side wall, 41d...Cable insertion groove, 41e...Engaging protrusion , 42...Duct cover, 42a...Top wall, 42b...Front side wall, 42c...Cable insertion groove, 42d
...Engagement hole, 42e...Latching portion, 43...Locking member.

Claims (1)

[Scope of utility model registration request] A cable is arranged to extend in the left-right direction along the lower edge of the front opening of a shelf that accommodates a plurality of printed boards and is arranged in a frame, and is detachably connected to the front end of the printed board. A cable duct for storing and laying cables, the cable duct consists of a duct main body and a duct cover superimposed on the main body, and the duct main body has a hollow cylindrical body with a central part of its upper wall extending along the longitudinal direction. A plurality of elongated cable insertion grooves are formed at predetermined intervals and are formed in a cross-sectional shape with a long groove cutout, and extend from the front upper wall to the front side wall of the main body, and are provided in the left-right direction of the upper wall. A coupling protrusion is provided on the upper surface of one end, and the duct cover is formed in a cross-sectional shape having an upper wall and a front wall extending downward from the front end of the upper wall, and the duct cover is elongated and extends from the front side wall of the cover to the upper wall. A cable insertion cut groove corresponding to and aligned with the cut groove of the duct body is provided, and an engagement hole for engaging with the coupling protrusion of the duct body is provided at one end of the upper wall in the left and right direction. At least one locking member is provided on an end side for engaging with the other end side of the upper wall of the duct body, and further includes at least one locking member for holding the upper wall of the duct body in cooperation with a lower surface of the upper wall of the duct cover. is provided on the lower surface of the upper wall of the duct cover, and the locking member is made of an elastic plate, has a width that can fit into the cut groove for cable insertion in the duct body, and is fixed to the duct cover at the center in the front and back direction. A cable duct for a rack device in a communication device, etc., characterized by having a length such that the front and rear upper walls of the duct body are held between the front and rear ends in a free state and the lower surface of the upper wall of the duct cover.