CN102790464B - Cable cleat - Google Patents

Abstract

The present invention relates to a cable clamp for holding a cable led out from a panel opening on a panel surface, the cable clamp having: a cable envelope mounted on the cable; a pair of upper and lower sides clamping the cable envelope the slide covers; mounting screws to mount each slide cover to the panel; and conical washers disposed between the slide cover and the mounting screws. The cable enclosure has a through hole through which the cable is inserted, and a slit communicating with the through hole from the side. Each of the pair of slide covers has a convex portion or a concave portion on an inner side surface when the pair of slide covers are arranged oppositely, and the convex portion and the concave portion are arranged so that, when the pair of slide covers are arranged oppositely, the convex portion of one slide cover It is at a position corresponding to the recess of the other slide cover. The sliding cover also has a first threaded hole for clearance fit of the mounting screw, and a first inclined surface inclined downward from the inner side to the outer side when the pair of sliding covers are arranged oppositely. The tapered washer has a second threaded hole through which the mounting screw passes, and a second inclined surface complementary to the first inclined surface of the sliding cover, and the second inclined surface is matched with the first inclined surface. When the above-mentioned mounting screws are inserted through the first threaded holes of the pair of oppositely arranged slide covers and the second threaded holes of the respective tapered washers and screwed into the panel, the protrusions and recesses of the oppositely arranged slide covers are fitted together, By compressing the cable packing body through the slide cover, the surroundings of the cable and the cable packing body can be kept waterproof.

Description

cable clamp

technical field

The present invention relates to a cable clamp for holding cables, and more particularly to a cable clamp for holding cables mounted on the periphery of an opening provided on a wall panel of a cabinet housing various electrical equipment and drawn out from the opening for externally providing the output from the motor device.

Background technique

Conventionally, there is known, for example, a cable clamp shown in Japanese Patent No. 3431355, which is composed of a plurality of modules arranged adjacent to each other in the vertical direction on a cabinet wall panel. In order to be able to hold cables between two adjacent modules, a hollow portion is provided on the surface of each module facing the adjacent module, and a roughly semi-cylindrical concave portion having a cable holding capacity is detachably installed in the hollow portion. The elastic packing of the small modular body. On the front surface and the rear surface of the module defining the hollow portion, there is provided a substantially semicircular cutout corresponding to the concave portion of the elastic packing, and through the concave portion of the elastic packing and the cutout portion, two adjacent modules keep the cable between.

In order to install this existing cable clamp on the opening periphery of the wall panel where the cable is drawn out, first clamp the cable with two adjacent and opposite elastic fillers, then install each elastic filler in the hollow part of the module and use the adjacent Module clamping, Next, multiple modules are mutually fixed with the screw which penetrates several modules adjacent up and down in an up-down direction. In this fixed state, the cable clamp is mounted on the wall panel by other screws penetrating from the front surface of the module to the rear surface. That is, in order to fix the cable clamp to the wall panel while holding the cable, screwing in two directions is required, and there is a problem that it takes time to work.

Contents of the invention

In order to solve the above-mentioned problems, the present invention provides a cable clamp that can hold the cable and fix the cable clamp to the panel simultaneously by tightening the screw in only one direction, and improves the operability of installation.

The present invention solves the aforementioned problems, mainly, in a cable clamp for holding a cable drawn out from a panel opening on a panel surface, there are: a cable envelope mounted on the cable; A pair of slide covers for the cable enclosure on the top; mounting screws for mounting each slide cover to the panel; A through hole through which the cable is inserted; and a slit communicated with the through hole from the side for the cable to pass through, each of the aforementioned pair of slide covers has a convex portion or Concavity, the convexity and the concavity are arranged so that when a pair of sliding covers are arranged oppositely, the convexity of one sliding cover is in the position corresponding to the concave part of the other sliding cover, and each sliding cover also has: for the aforementioned mounting screws The first threaded hole for clearance fit; and the first inclined surface inclined downward from the inner side to the outer side when the pair of sliding covers are arranged oppositely, the tapered washer has: the second threaded hole for the aforementioned mounting screw to pass through; and The second inclined surface complementary to the first inclined surface of the slide cover is matched with the second inclined surface on the first inclined surface. When the aforementioned mounting screws are inserted through the first threaded holes and When the second screw hole of each tapered washer is screwed into the panel, the aforementioned convex portion and the aforementioned concave portion of the oppositely arranged slide cover are fitted together, and the cable enclosure is compressed by the slide cover, so that the periphery of the cable and the cable enclosure can be aligned. The perimeter of the enclosure remains waterproof.

With such a structure, watertight sealing can be achieved between the pair of slide covers and the cable covering body, and between the cable covering body and the cable, and water leakage from these gaps can be prevented.

Here, it is preferable to use an elastic body such as rubber as the cable covering body.

Preferably, a sliding gasket is provided on the side surface of the panel of the sliding cover. The sliding gasket is an elastic body made of a material with little frictional resistance with the surface of the panel. By applying a coating on the side surface of the panel, Or apply lubricating oil on the side surface of the panel to reduce the frictional resistance with the surface of the panel and make it easier for the sliding cover to slide on the panel along the direction of filling the cable envelope.

The cable enclosing body preferably has an annular protrusion approximately in the middle of the through-hole inner wall in the penetrating direction, so as to further improve the waterproof seal between the cable enclosing body and the held cable.

Preferably, the sliding cover has inwardly protruding claws on the left and right side parts of the first inclined surface, and when the second inclined surface is matched with the conical washer on the first inclined surface, it can be fitted with the claws to prevent fall off.

Preferably, the sliding cover has an elastic cylindrical body integrally provided with the inner wall of the first threaded hole and extending along the rear surface of the sliding cover. Thereby, especially in the case of attaching the cable clamp of the present invention to the bottom panel or the side panel of the cabinet, the attaching screw can be temporarily fixed without coming off.

According to the present invention, using the first inclined surface provided on a pair of opposite slide covers and the second inclined surface complementary to the first inclined surface provided on the tapered washer, when the mounting screws passing through these inclined surfaces When screwed and fixed to the panel, the sliding cover located between the immovable conical washer and the panel is relatively close to each other, enabling a watertight seal between the sliding cover and the cable gland and between the cable gland and the cable. Crimp.

In addition, by fixing the mounting screws, a force is also applied in the direction of pressing the slide cover against the panel, so that the slide cover and the panel can be waterproofed and pressure-bonded.

Description of drawings

Fig. 1 is an exploded front view of one embodiment of the cable clamp of the present invention.

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

Fig. 3 is a front view of a state in which cables are held by the cable clamp of Fig. 1 .

FIG. 4 is a top view of the cable clamp of FIG. 3 without showing the retained cables.

Fig. 5 is a sectional view along line B-B of Fig. 3 .

Fig. 6 is a cross-sectional view along line C-C of Fig. 3 .

Fig. 7 is an explanatory diagram of a method of opening a slit of a cable covering body and pressing a cable.

FIG. 8 shows a state in which the mounting screws 5 are removed in a sectional view taken along line D-D of FIG. 1 .

Fig. 9 is an exploded front view of a different embodiment from Figs. 1-8.

Fig. 10 is a front view of a state in which cables are held by the cable clamp of Fig. 9 .

Fig. 11 is a sectional view taken along line E-E of Fig. 10 .

(Symbol Description)

1 panel

2 cutouts for panels

3, 3' sliding cover

4, 4’, 4”, 4’”, 104, 104’, 104”, 104’”, 104”” Cable Enclosures

5, 5’, 105 mounting screws

6. 6' sliding spacer

7. 7' first inclined surface

10, 110' convex part

11. 111' concave part

12, 12' side wall

13, 13' conical washer

14, 14’, 114, 114’, 114” cutouts

15, 15' the first hole

16, 16' second inclined surface

17, 17' second hole

21, 21’, 21”, 121, 121’, 121” slits

22, 22’, 22” through holes

24 ring protrusions

25 claws

26 barrel

27 claws

detailed description

As shown in Fig. 2 and Fig. 5-6, the cable clamp of the present invention is installed on the periphery of the opening 2 provided on the wall panel 1 of the housing of the electrical equipment connected with the cable. In the embodiment shown in Figures 1 to 8, the cable clamp has: cable enclosures 4, 4', 4", 4'" installed on the cables 29, 29', 29"; A pair of sliding covers 3, 3' of the cable enclosures 4, 4', 4", 4'" that are mounted to the cables 29, 29', 29" by side clamping; each sliding cover 3, 3' is installed on Mounting screws 5, 5' on the panel 1; and conical washers 13, 13' arranged between each sliding cover 3, 3' and the mounting screws 5, 5'.

A pair of slide cover 3,3' is the same way in this embodiment, as shown in Figure 1, because a slide cover (3 ') is arranged opposite to another slide cover (3) symmetrical with it in the up-down direction , so a slide cover 3 is described below. The slide cover is substantially box-shaped, and has a hollow portion 30 recessed inwardly from the lower surface. As will be described later with reference to Fig. 6, the depth of the hollow portion 30 is to clamp the cable enclosing body 4, 4', 4 ", 4'", when the slide covers 3, 3' are pressed against each other, the depths of the cable enclosures 4, 4', 4", 4'" can be compressed from the up and down directions. The side walls 12, 12 on the left and right sides of the hollow portion 30 are solid parts having a predetermined thickness in the left-right direction (the left-right direction in FIG. 1 ) and the front-rear direction (the left-right direction in FIG. 5 ). The inner surface of 3, 3' when oppositely disposed is a crimping surface to be crimped with the opposite sliding cover 3'. A convex portion 10 is provided on one pressure-bonding surface of the left and right side walls 12 , 12 , and a concave portion 11 capable of fitting the convex portion is provided on the other pressure-bonding surface.

Referring to Fig. 1, on the front surface and the rear surface of the slide cover 3 where the hollow portion 30 is provided, three substantially arc-shaped cutouts 14', 14, 14' starting from the lower edge are provided. In this embodiment, the cutout 14 in the middle is small, and the cutouts 14', 14' on both sides are large. The size and number of the cutouts can be appropriately selected according to the diameter and number of cables to be held.

As shown in FIGS. 2 , 5 and 6 , sliding gaskets 6 are bonded from the crimping surface to the rear surface of the side wall 12 of the sliding cover 3 and the upper and lower edges of the rear surface of the sliding cover 3 . The sliding spacer 6 is made of elastic body, and the sliding cover 3 can be easily moved up and down on the panel 1, and the sealing performance of the opening 2 is improved by the cable clamp.

As shown in FIG. 5 , on the front surface of each side wall 12 , there is provided a first surface inclined downward from the lower edge toward the upper edge, that is, from the inner side to the outer side when the pair of sliding covers 3 and 3 ′ are arranged oppositely. The inclined surface 7 is formed with a top 8 which is flush with other parts of the front surface of the slide cover 3, an inclined surface 7, and a bottom 9 whose thickness in the inward and outward direction is thinner than other parts. A first hole 15 is perforated in the middle of the inclined surface 7 along the inward-outward direction of the sliding cover 3 , and the diameter of the first hole 15 can be inserted into the mounting screw 5 in a state of clearance fit.

On the first inclined surface 7 of the side wall 12 there is provided a conical washer 13 having a second inclined surface 16 complementary to the inclined surface 7 . A hole 17 is perforated in the tapered washer 13 , and the hole 17 has a diameter for inserting the mounting screw 5 in a tight state.

FIG. 8 shows a section along line D-D of FIG. 1 in a state where the mounting screws 5 are removed. On the inner wall of the hole 15 provided on the inclined surface 7 of the side wall 12, an elastic cylindrical body 26 facing the rear surface of the cover 3 is integrally provided, and a claw 25 protruding radially inward is provided on its front end. The claw 25 prevents the mounting screw 5 from coming off when the mounting screw 5 is inserted into the cylindrical body 26 . In addition, claws 27 protruding inward are provided on the side wall 12 portions on the left and right sides of the inclined surface 7 . The lower part of the tapered washer 13 is a part with a large diameter on the outer circumference. If the tapered washer 13 is installed on the inclined surface 7, the top of the large diameter part will fit with the claw 27 of the side wall part, especially in the When the cable clamp 1 is attached to the bottom panel or the side panel of the cabinet, it is possible to prevent the tapered gasket 13 from coming off. In addition, although FIG. 8 shows the right side wall portion of the slide cover 3, the left side wall portion has a symmetrical structure to the right side wall portion.

A plurality of cable enclosures 4, 4', 4", 4'" clamped by a pair of sliding covers 3, 3' are respectively installed on each cable, and only one cable enclosure 4 will be described below. The cable cover 4 is a substantially rectangular parallelepiped member made of elastic material such as rubber, and has a substantially cylindrical through-hole 22' penetrating from the center of the front surface to the center of the rear surface. The diameter of the through hole 22' can be appropriately selected in accordance with the diameter of the cable 29 so that the cable 29 can be embedded. As shown in FIGS. 2 and 6 , an annular protrusion 24 is provided approximately in the center of the through-hole 22 ′ in the direction of penetration, and the diameter of the through-hole 22 ′ becomes smaller at this portion, which improves the performance of the embedded cable 29 . of tightness. A slit 21' communicating with a through-hole 22' is provided on one peripheral surface of the enclosure 4, for example, from the left side in this embodiment, penetrating from the front surface to the rear surface.

Next, a method of attaching the slide cover 3 and the cable enclosure 4 having such a structure to the peripheral edge of the opening 2 provided on the wall panel 1 of the cabinet with the attachment screws 5 will be described.

First, as shown in Fig. 7, the cable wrapping body 4 is elastically deformed, the slit 21' is opened, and the cable 29' led out from the opening 2 is inserted into the through hole 22'. At this time, corresponding to the thickness of the cables 29, 29', 29", a plurality of cable enclosures 4, 4', 4", 4 with different overall dimensions of the through-holes 22, 22', 22" having different diameters may be used. '". In this embodiment, four cable enclosures 4-4'" are used side by side in a horizontal direction.

Next, a pair of slide covers 3, 3' are arranged oppositely up and down on the front surface of the panel 1 at the periphery of the opening 2 in such a way that the respective hollow parts 30, 30' face each other, and one of the slide covers 3, 3 ' is denoted by the reference numeral 3 in FIG. 1 and the other by the reference numeral 3'. If configured in this way, the convex portion 10 provided on the crimping surface of the slide cover 3 is opposite to the concave portion 11 ′ provided on the crimping surface of the slide cover 3 ′, and the concave portion 11 arranged on the crimping surface of the slide cover 3 is opposite to the concave portion 11 ′ provided on the crimping surface of the slide cover 3 The protrusions provided on the crimping surface of the sliding cover 3' are opposite to each other. Here, the upper part of the cable enclosures 4-4'" is elastically inserted into the hollow portion 30 of the slide cover 3, and the lower part is elastically inserted into the hollow portion 30' of the slide cover 3'.

Furthermore, if the pair of slide covers 3, 3' are arranged facing each other in this way, the first inclined surfaces 7, 7' are arranged to be inclined downward from the inner side to the outer side of each other.

On the first inclined surfaces 7, 7' of the slide covers 3, 3', the second inclined surfaces 16, 16' of the tapered washers 13, 13' are arranged in cooperation with each other, and the mounting screws are inserted into the head screws 5, 5', so that It passes through the first hole 17 and the second hole 15 from the side of the tapered gasket 13 , 13 ′, and its male thread 18 is screwed with the female thread 19 , 19 ′ provided in the panel 1 . In this way, the tapered washers 13, 13' that are closer to the heads of the mounting screws 5, 5' and the panel 1 provided with the female thread 19, 19' are positioned and fixed by the mounting screws 5, 5'. In this state, if the The mounting screws 5, 5' are screwed in according to the direction of the arrow A in Fig. 5, the first inclined surfaces 7, 7' on the side of the sliding cover 3, 3' and the second inclined surfaces 16, 16 on the sides of the tapered washers 13, 13' ' will become a crimped state, and the slide covers 3, 3' move towards the inner side of each other (arrow B in Figure 5), that is to say, a pair of slide covers 3, 3' all move toward each other. Moving, in the sliding cover 3, 3', the mounting screws 5, 5' are gap-fitted in the first holes 15, 15' thereof. At this time, the convex portion 10 and the concave portion 11 of the slide cover 3 are respectively fitted with the concave portion 11' and the convex portion 10' of the slide cover 3', and the slide covers 3 and 3' are accurately positioned in the left-right direction.

Then, finally, as shown in FIG. 5 , each convex portion 10, 10 ′ is completely fitted with each corresponding concave portion 11 ′, 11, and the crimping surfaces of the two side walls 12 of the slide cover 3 and the two side walls of the slide cover 3 ′ 12' crimping surface crimping, in addition, as shown in Figure 6, the upper and lower sides of the cable envelope 4 ~ 4'" clamped in the hollow part 30, 30' press each other. That is, as explained before, The depth of the hollow parts 30, 30' is such that the cable covering bodies 4 to 4'" are clamped inside and the sliding covers 3, 3' are pressed against each other in this way, so that the cable covering bodies 4 can be compressed from the up and down direction. The depth of ~4'". In this way, the cables 29, 29', 29" embedded in the through holes 22, 22', 22" of the cable enclosure 4 ~ 4"' maintain a waterproof seal around them, especially in the The portion where the annular protrusion 24 and the cable are crimped on the inner wall of the through hole 22' has a higher degree of sealing.

In addition, the first inclined surface 7, 7' on the side of the slide cover 3, 3' and the second inclined surface 16, 16' on the side of the tapered gasket 13, 13' are in a pressure contact state, so when the slide cover 3, Pushing 3' against the direction of the panel 1 can also generate force, so the airtightness between the sliding covers 3, 3' and the panel 1 can also be maintained through the sliding gasket 6 arranged on the rear surface.

In addition, the cutout portions 14, 14' provided on the front and rear surfaces of the slide covers 3, 3' are sized so that, in the crimped state shown in FIGS. The parts 14, 14' can lead out the cables 29, 29', 29" embedded in the through-holes 22, 22', 22" of the cable enclosures 4-4'".

A second embodiment of the present invention is shown in FIGS. 9 to 11 . In this embodiment, the sliding cover is arranged in two layers, and the cable enclosures 4, 4', 4", 4"' and 104, 104', 104", 104"', 104"" are respectively installed on the two rows of cables 19, 19', 19" and 119, 119', 119" up. The structural difference with the aforementioned first embodiment is that: the central portion of the opening 2 of the panel 1 is arranged laterally; the fixed cover 3 "fixed to the panel 1 with mounting screws 105". The fixed cover 3 "has a sliding cover 3,3" 'The hollow part 30, 30' and the crimping surface of the side wall 12, 12' are the same structural part, in addition, it is also provided with the convex part 10, 10', the concave part 11, 11' and the cutout of the sliding cover 3, 3' 14, 14' the same convex part 110, 110', recessed part 111, 111' and cutout part 114, 114', 114". On the upper and lower sides of the fixed cover 3", the same The sliding covers 3, 3' are fitted with tapered washers 13, 13' on the inclined surfaces 7, 7' and the inclined surfaces 16, 16', and the mounting screws 5, 5' are screwed into the panel 1 for fixing. Fig. 10 and Fig. 11 have shown respectively and Fig. 3 and the state corresponding to Fig. 5, the cable 19,19 ', 19 " and 119,119 ', 119 " of various diameters are passed through slit 21,21 ', 21 " and 121, 121', 121" embedded cable enclosures 4, 4', 4", 4'" and 104, 104', 104", 104'", 104"" are elastically embedded in the sliding cover 3 and fixed The hollow part of the cover 3" and the hollow part of the fixed cover 3" and the sliding cover 3' are compressed.

In addition, although the second embodiment has two upper and lower layers, it can also be completed with three or more layers of cable clamps of the same structure.

Claims (6)

1. A cable clamp for holding a cable leading out of a panel opening on a panel surface, having: a cable gland fitted to the cable; A pair of slide covers clamping the cable enclosure fitted to the cable from the upper and lower sides; the mounting screws that attach each slide to the panel; and Conical washers configured between each slide and mounting screw, It is characterized in that, The aforementioned cable enclosure has: a through hole for the cable to be inserted through; and a slit communicated with the through hole from the side for the cable to pass through, Each of the aforementioned pair of slide covers has a convex portion or a concave portion on the inner side surface when the pair of slide covers are arranged oppositely, and the convex portion and the concave portion are configured such that when the pair of slide covers are arranged oppositely, the The convex portion is at a position corresponding to the concave portion of the other slide cover, Each sliding cover also has: a first threaded hole for the clearance fit of the aforementioned mounting screws; The tapered washer has: a second threaded hole through which the aforementioned mounting screws pass; and a second inclined surface complementary to the first inclined surface of the sliding cover, the second inclined surface is matched with the first inclined surface, When the aforementioned mounting screws are inserted through each first threaded hole of a pair of oppositely arranged slide covers and the second threaded holes of each tapered washer and screwed into the panel, the aforementioned protrusions and the aforementioned recesses of the oppositely arranged slide covers fit into each other. At the same time, by compressing the cable enclosure through the sliding cover, the surroundings of the cable and the cable enclosure can be kept waterproof. 2. The cable clamp of claim 1, wherein: The aforementioned cable encapsulating body is an elastic body. 3. The cable clamp according to claim 1 or 2, characterized in that, A sliding pad is provided on the surface of the panel side of the aforementioned sliding cover. The sliding pad is an elastic body made of a material with little frictional resistance with the surface of the panel. By applying a coating or Apply lubricating oil to the surface of the panel side to reduce frictional resistance with the panel surface. 4. The cable clamp of claim 1, wherein: The cable enclosing body has an annular protrusion substantially in the middle of the through-hole inner wall in the through-hole direction. 5. The cable clamp of claim 1, wherein: The slide cover has inwardly protruding claws on the left and right sides of the first inclined surface, so that when the tapered gasket is arranged on the first inclined surface in such a manner that the second inclined surface cooperates with the first inclined surface, the The claws fit together, preventing it from falling out. 6. The cable clamp of claim 5, wherein: The sliding cover has an elastic cylindrical body integrally provided with the inner wall of the first threaded hole and extending toward the rear surface of the sliding cover.