FI114257B - Lead-piece - Google Patents

Description

114257 Cable gland

The present invention relates to a lead-through piece for conducting sealing cables through a wall 5 with a through hole, without removing the connectors, through connection cables having a connector at both ends.

Inexpensive interface cables are available for computer equipment and are produced by automatic machines. They typically have connectors at both ends, so they are very easy to use. Such cables include invisible-10 cable, serial and parallel port cables, and network cable.

Even for powering the device, there is an inexpensive connection cable that is preferably used. However, if the cable should be sealed to obtain a better sealing class, it is necessary to remove the connector at least at one end using conventional cable glands. In this case, you will usually also need to use a different type of connector that can be disassembled. Work is difficult and even electrical safety can be compromised. Of course, an alternative method is to use a special waterproof connector. However, they are expensive, laborious and often non-standard and difficult to obtain.

. . To overcome these drawbacks, a bushing according to the invention is provided. . a piece of sticks having the features set forth in claim 1. ·. part of the independent.

»I

:> j When sealing the interface cable with the gasket I * ['·. 25 and not, for example, by the use of a special waterproof connector, it also achieves the advantage that a large number of cables can be introduced into the device from a small opening. For example, in vehicle devices, this has the particular advantage of reducing the size of the device.

• I

Advantageous further developments of the invention are set forth in the dependent claims.

• · · 114257 2

The invention will be further described below with reference to the accompanying drawings, in which:

Figure 1 is a perspective view of a lead-through member according to the invention.

5

Fig. 2 shows a lead-through member according to Fig. 1, viewed from another direction.

Figure 3 shows a tubular portion of a lead-through member.

10

Fig. 4 shows a part of Fig. 3 fitted with a part of a gasket.

Fig. 5 shows a part of Fig. 3 in which the gasket is fitted in its entirety.

15

Fig. 1 shows a lead-through piece generally designated 1 for conduction of connection cables 2 with a connector 3,4 at each end through a wall 6 provided with a lead-through opening 5 without removing the connectors 3,4. In Figure 1, the lead-through member 1 is pre-assembled and a single connection cable 2 is provided through it 20, but the lead-through member 1 itself is not. in the example of FIG. 1, for the purpose of illustration, the wall 6 is connected to a through hole 5 therein.

•! The lead-through piece 1 comprises a tubular, preferably metal, ·. 25, as best shown in Figure 3. The inner dimensions of the tubular section 7 are selected such that at least one of the connection 3,4 of the connection cable 2 is: ·>. adaptable through it.

* · * · T '-' The tubular portion 7 of the lead-through member 1 is mated at one end to: 30 close tightly to the lead-through opening 5 provided in the wall 6 with its opening; · * The dimensions of the machine are, of course, also chosen such that at least one of the connection cables: Ύ: the connection 3,4 of the game 2 can be fitted through it.

• · 114257 3

The end 6 of the wall 6 provided with the through hole 5 of the tubular member 7 is provided with a securing flange 10. The securing flange 10 is provided with a seal 11 and is arranged to be connected, for example, by screws 12 to the wall 6 around the through opening 5. The sealing between the mounting flange 10 and the wall 6 is easy to accomplish thanks to the straight surfaces.

Inside the tubular part 7 of the lead-through piece 1, after the connection cables 2 have been fitted, or together with the connection cables 10, a gasket 8 of elastic material is usually formed, which is usually arranged in several parts and arranged around the connection cables 2. for connection cables 2. However, the gasket 8 is shaped such that the gasket will work even if there are no cable 2 in all of the cable locations. .

One or more pressing members 9 are provided in the lead-through member 1 to direct the pressing of said resilient material: seal 8 so that the seal 8 is pressed tight against the lead-in member: '. The inner surfaces of the tubular part 7 and the outer surfaces of the connection cables 2. You- ; 1; the compression pressure of the club compresses the parts of the seal 8 against each other so that the parts

<I

; . no gaps remain.

: 25

In the example of the drawing, the press member is formed by a strip, preferably: 1. '; a piece of metal sheet 9 which is joined at one edge 13 • »; ··; pivotally to tubular member 7, in the example of Fig. '. by means of screws 20 and respective openings provided in the tubular part 7, and at the opposite edge 14, at least one screw 15 is arranged, which in the example of Fig. a threaded hole 22 disposed in the conical portion 7 for moving the ribbed piece 9 • · 4 114257 with respect to the tubular portion 7. The molding body 9 is arranged to form part of the tubular part 7. With the help of the molding body 9 the cross-section of the tubular part 7 can be changed, whereby the seal 8 can be subjected to the desired compression.

5

In order to distribute the clamping force in the desired manner in the area of influence of the clamping member 9, the clamping member 9 can be divided into sections at which the clamping can be independently adjusted. In the example of Figure 1, the bead-like piece 9 is formed as a unitary piece but is provided with grooves 23 extending almost across the bead-like piece 10, which in the example of the figure divides the bead-like piece 9 into four independently operating portions.

At both ends of the gasket 8 in the tubular part 7 of the lead-through piece 1 are combs made of metal plate 16,17 followed by a plurality of notches 24 for connection cables 2. The combs 16,17 on the one hand prevent the seal 8 from slipping off and on the other hand make it sealed to EMC (electromagnetic compatibility).

A second comb iron 16 is disposed between a flange 10 of the lead-through piece 1 and a wall 6 where it is pressed tightly upon attachment of the lead-through piece 1 to the wall 6, and the second comb iron 17 is mated to rest on one or more shoulders 25 and • '; into the openings 26 provided in the piece 9, whereby when the seal 8 is pressed, the seal 8 also presses the comb iron 17 firmly against the shoulder 25 and; ·. 25 apertures 26. This produces electrical contacts close enough to each other to form an EMC-tight structure. For the touch you trust; ' ·. to get a normal electrical contact large enough, keep the comb iron: '". 16.17 ends to be thin.

»·» • «» · • • • • 1 • · · »• · ·

Claims (8)

A lead-through piece (1) for conducting connection cables (2), both ends of which are provided with a connection (3, 4), sealing through a wall (6) provided with a feed-through opening (5) without loosening the connections ( 3, 4), characterized in that the lead-in (1) comprises an elongated part (7), which is so selected that at least one of the connections 10 (3,4) of the connecting cable (2) can be applied through it, that the lead-in (1) is arranged at one end to seal sealingly through said passage opening (5), to be inserted into the movable part (7) of the guide piece (1) after the application of the connection pieces (2) or for application together with the connecting pieces ( 2) the connecting pieces (2) surrounding the sealing material (8) made of elastic material, and »20 having one or more clamping means (9) arranged for applying pressure to said sealing material made of elastic material (8) say that | said seal tightly pressed against the inner surfaces of the tubular member (7) and the outer surfaces of the connecting cables (2). . * 2. A feed-in piece according to claim 1, characterized in that the movable part (7) is provided with the fastening flange (10) against the wall (6) which is provided with the opening (5). »· A feed-through piece according to claim 2, characterized in that the fastening flange (10) is provided with a seal (11) and is arranged to be connected to the wall (6) around the feed-through opening (5) with a screw (12). 114257 4. A feed-through piece according to claim 1, characterized in that the pressing means is formed by a molded piece (9), which with its one edge (13) is pivotally connected to the movable part (7) and on the opposing edge (14) has at least one force member (15) is provided to displace the molded piece relative to the tubular member (7). 5. A feed-through piece according to claim 4, characterized in that the power means is a screw (15). 6. A feed-through piece according to claim 4, characterized in that the molded piece (9) is arranged to form part of the tubular part (7). 7. Feed-through piece according to claim 1, characterized in that the pressing means (9) is divided into parts to distribute the pressing force in the desired manner within the operating range of the pressing means. 8. A feed-through piece according to claim 1, characterized in that the ends of the tubular part (7) are arranged to be closed with camshafts (16,17), which are arranged to make the structure EMC-tight (electromagnetic compatibility). • * »i * * · ♦ t * ► I · I t | O • * * * · • ·