JPH0451954B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a cable connection device, for example,
A main scale installed in the longitudinal direction within the elongated case, and an index disposed within the elongated case to face the main scale and to be relatively movable along the elongated case in the longitudinal direction. a scale; and a device disposed outside the elongated case so as to be movable relative to the elongated case integrally with the index scale, the main scale Changes in physical quantities based on relative movement between the index scale and the index scale are converted into length measurement electrical signals by an electrical circuit housed in the device, and the signals are output to an external device via a flexible cable. The present invention relates to an improvement in a cable connection device for detachably connecting the flexible cable to a relay connection box connected to a device that moves within a certain range, such as a linear displacement detection device.

[Conventional technology]

For example, as shown in FIGS. 1 and 2, an elongated case 10 is used as a cable connection device for measuring or adjusting the relative position of two objects. A main scale 12 installed in the longitudinal direction, and the elongated case 1
0, an index scale 14 facing the main scale 12 and disposed so as to be relatively movable in the longitudinal direction of the elongated case 10 along the main scale 12.
and a slider 16 disposed outside the elongated case 10 and integrally with the index scale 14 so as to be relatively movable in the longitudinal direction along the elongated case 10, Changes in physical quantities based on the relative movement between the main scale 12 and the index scale 14 are converted into length measurement electric signals by the electric circuit 18 housed in the slider 16, and then sent to the outside via the flexible cable 20. Some are configured to output to a device (not shown). The main scale 12 and the index scale 14 are both made of transparent material such as glass,
Vertical striped memories 12A and 14A each made of an optical grating are formed on the opposing surfaces, and light from the light emitting element 22 passes through the main scale 12 and the index scale 14 and reaches the light receiving element 24 on the opposite side. When the memory 12
A bright and dark striped pattern is generated between A and 14A, and by reading this striped pattern with the light receiving element 24, the amount of movement of the object to be measured can be read. The brightness and darkness of the light received by the light receiving element 24 is as follows:
The signal is converted into an electrical signal and output to an external device via the electrical circuit 18 and flexible cable 20, where it can be recorded or displayed. Reference numeral 26 in the figure is a wire spring for elastically pressing the index scale 14 against the main scale 12, 28 is a roller for transferring and guiding the index scale 14 along the surface of the main scale 12, and 30 is a wire spring for elastically pressing the index scale 14 against the main scale 12. Cables for sending the output signal of the light receiving element 24 to the electric circuit 18 are shown. Here, the index scale 14 and the slider 16 are connected to an arm portion 3 protruding from the elongated case 10.
They are connected via 2. This arm portion 32 moves along the longitudinal direction of the longitudinal groove 10A formed in the lower part of the elongated case 10 when the index scale 14 and slider 16 move relative to the main scale 12. At this time, in order to prevent oil, dust, etc. from entering from the outside, the arm portion 32 has a pair of seal members 34 arranged on both sides of the groove 10A.
A and 34B are in sliding contact with each other and are moved by pushing them open. As described above, the inside of the elongated case 10 is isolated from the outside by the seal members 34A and 34B, and oil, dust, etc. are prevented from entering into the elongated case 10, but conventionally, the inside of the slider 16 is Oil, water, etc. could enter and adhere to the electrical circuit 18, causing adverse effects such as generating erroneous signals. This includes a flexible cable 2 inside the slider 16.
It was found that the conduit penetrated into the slider 16 through a flexible conduit consisting of a mesh or a spiral tube that constituted the outer skin of the 0. In addition, especially when the scale is long and the moving range of the slider 16 and the length of the flexible cable 20 are correspondingly long, the flexible cable 2
There is a problem in that oil or the like tends to penetrate into the slider 16 through the surrounding area. On the other hand, conventionally, a junction box is provided at a position away from the slider 16, and both ends of the relay flexible cable between this junction box and the slider 16 are firmly sealed and bonded, and further, the junction box is There is also a device in which the end of the flexible cable that connects the end of the flexible cable and the measuring device is sealed and bonded to the connection box.

[Problem to be solved by the invention]

However, in this case, the slider 16 is connected to the relay cable between the connection boxes and the cable between the connection box and external equipment using wire braid or a metal called a so-called metal flexible (conduit cable) to prevent damage. The ends of these flexible conduits are covered with the slider 1.
6 and is fixed to the junction box by gluing or soldering,
Further, since the relay cable and the flexible cable are similarly fixed by soldering, it is very difficult to replace the flexible cable when changing the length of the main scale 12, for example. occurs. Also, during measurement, slider 1
During the reciprocating movement of 6, the load increases due to the increase in inertia due to the increase in the weight of the connection box, and furthermore, in order to prevent the connection box from colliding with the elongated case 10 on the main body side, the connection box moves together with the slider 16. In addition, it has to be supported and fixed to a separate member from the elongated case 10 side, which poses a problem in that it requires volume, weight, installation work, and sealing work. This invention was made in view of the above-mentioned conventional problems, and it is possible to miniaturize the junction box and prevent oil etc. from entering the junction box without sealing the flexible cable and the junction box. Reliably prevents infiltration,
Moreover, it is an object of the present invention to provide a cable connection device that allows easy replacement of flexible cables. Another object of the present invention is to provide a cable connection device that is small and lightweight, and that places less load on equipment during movement. Furthermore, it is an object of the present invention to provide a cable connection device that allows electrical shielding to be easily performed via a metallic flexible conduit without requiring work such as soldering. . Furthermore, the present invention provides a cable connecting device that allows flexible cables to be easily and reliably attached and detached without the need for adhering the flexible conduit to the junction box or removing the soldered portion. The purpose is to provide.

[Means to solve the problem]

This invention provides a cable connection in which a flexible cable protected by a flexible conduit tube is electrically connected detachably to the internal wiring of a device that moves within a certain range through a relay junction box. In the device,
At least the vicinity of the connection part of the flexible cable of the connection box has a sealed structure except for the opening for electrical wiring; and one side is connected to the connection terminal in the connection box through the opening for electrical wiring. a first connector provided with an electrical contact; formed integrally with the connection box, supporting the first connector internally with its connection side end exposed, and having a first threaded portion formed on the outer periphery; a first cylindrical member; a second connector capable of being fitted into the first connector and having the other electrical contact connected to the cable; an end of the cable and a second connector connected thereto; is internally supported except for the connection side end of the second connector, and when the second connector is fitted to the first connector, the end is butted against the end of the first cylindrical member, a second threaded portion formed on an outer periphery near the cable-side end and having a smaller diameter than the first threaded portion; a first threaded portion larger in diameter than the second threaded portion formed on the outer periphery near the second connector-side end; an outer step portion having a smaller diameter than the second connector formed on the inner periphery and having a smaller diameter than the maximum outer diameter of the second connector to be enclosed;
a second cylindrical member having a first inner step that restricts movement of the second connector in the direction of the cable; fitted on the outside of the second cylindrical member, the inner periphery of the cable side end can pass through the second threaded portion, and
a second inner step portion having a smaller diameter than the outer step portion and configured to prevent the connector from coming off in the direction of the second connector side end by coming into contact with the outer step portion;
a first tightening cylindrical body having a third threaded portion formed to be able to be screwed into the first threaded portion of the first cylindrical member when the cylindrical member and the second cylindrical member are in abutted state; a first sealing member interposed between the first connector and the second connector or between the first cylindrical member and the second cylindrical member in abutting state, and sealing the first connector and the second connector; the second sealing member; A second cylindrical member interposed between the inner periphery of the second cylindrical member and the outer periphery of the cable contained in the second cylindrical member at an end position on the cable side of the cylindrical member, and sealing the gap therebetween.
a sealing member; a third inner step portion that engages with the cable side member to prevent the cable from coming off; and a fourth threaded portion that is threaded into the second threaded portion of the second cylindrical member; a second tightening cylindrical body that presses the second sealing member between the inner periphery of the second cylindrical member and the outer periphery of the cable by the third inner step portion when screwed into the fourth threaded portion; , the inner periphery of the second inner stepped portion of the first tightening cylindrical body is screwed with the fourth threaded portion of the second cylindrical member to form a sacrificial threaded portion passing through in the axial direction, thereby achieving the above object. It is. Further, in the present invention, the cable side member that the third inner step of the second tightening cylinder engages with is a flange provided at the end of a flexible conduit that encloses and protects the cable. By doing so, the above purpose is achieved. Further, the present invention achieves the above object by making the cable-side end surface of the second cylindrical member a contact surface that contacts the flange and electrically connects the second cylindrical member and the flexible conduit. It is something to be achieved. Further, the present invention achieves the above object by bringing the outer periphery of the first connector into contact with the inner periphery of the first cylindrical member via a third sealing member. Further, in the present invention, the inner periphery of the cable side end of the second cylindrical member is a tapered hole that expands outward, and the second seal member is a tapered cylindrical body that is fitted into the tapered hole. This achieves the above objective. Further, in the present invention, the second cylindrical member
The part that holds the connector is inserted through the sealing member,
The above object is achieved by making the main body side part including the outer step part a detachable split type. Further, in the present invention, the outer lines of the first and second tightening cylinders are set closer to the center of the connection box than the outer line of the connection box that is furthest away from the center of the connection box in the direction perpendicular to the movement direction of the connection box. The above purpose is achieved by placing it on the side.

[Effect]

In this invention, the first cylindrical member that includes the first and second connectors, and the second cylindrical member that is abutted against the first cylindrical member, are fastened and fixed.
On the inner periphery of the tightening cylindrical body, there is a third threaded part that is threadedly engaged with the first threaded part of the first cylindrical member, and a second inner side that reliably presses the second cylindrical member toward the first cylindrical member when the third threaded part is threadedly engaged with the first threaded part of the first cylindrical member. Since the stepped portion and the second threaded portion of the second cylindrical member are provided with a discarded screw portion that threads through in the axial direction, the first tightening cylinder and the second tightening cylinder are formed to have approximately the same outer diameter. This allows the first tightening cylinder to have a minimum diameter, and furthermore, the whole can be made compact.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the same or equivalent parts in FIGS. 1 and 2 are given the same reference numerals as in FIGS. 1 and 2 to simplify or omit the explanation. In this embodiment, as shown in FIGS. 1 and 2, a main scale 12 is installed in the longitudinal direction inside an elongated case 10, and a main scale 12 is disposed opposite to the main scale 12 within the elongated case 10. and an index scale 14 disposed so as to be relatively movable in the longitudinal direction of the elongated case 10 along this, and an index scale 14 disposed outside the elongated case 10 and integrated with the index scale 14. case 10
a slider 16 disposed so as to be relatively movable in the longitudinal direction along the main scale 12 and the index scale 14, and a slider 16 accommodated in the slider 16 that changes the physical quantity based on the relative movement between the main scale 12 and the index scale 14. The electric circuit 18 converts it into a length measurement electric signal, and sends it to a relay junction box 19 and a flexible cable 20.
In the cable connection device configured to output to external equipment via the connection box 19, as shown in FIGS. 3 and 4, the connection box 19 is
The connection terminal 1 in the connection box 19 is connected to the connection terminal 1 in the connection box 19 through the electrical wiring opening 17.
a first connector 36 having one electrical contact connected to the connector 9A; formed integrally with the slider 16, and internally supporting the first connector 36 with its connecting end 36A exposed; , a first cylindrical member 40 having a first threaded portion 38 formed on its outer periphery.
and; a second connector 42 which is capable of being fitted into the first connector 36 and has the other electrical contact connected to the cable 20; and the cable 20.
and the second connector 42 connected thereto.
is internally supported except for the connection side end 42A of the second connector, and when the second connector 42 is fitted to the first connector 36, the end protrudes from the end of the first cylindrical member 40. a second threaded part 44 having a smaller diameter than the first threaded part 38 formed on the outer periphery near the end on the side of the cable 20 and the second threaded part formed on the outer periphery near the end on the second connector 42 side; 44 and a smaller diameter than the first threaded portion 38 , an outer step portion 46 is formed on the inner periphery, and has a smaller diameter than the maximum outer diameter of the second connector 42 to be enclosed; a second cylindrical member 50 including a first inner step 48 that restricts movement in the direction of the cable 20 ; A second threaded portion 44 that can pass through the second threaded portion 44 and has a smaller diameter than the outer step portion 46 and prevents the connector from coming off in the direction of the side end of the second connector 42 by coming into contact with the outer step portion 46. 2 inner step portion 52, a third threaded portion 54 formed to be able to be screwed into the first threaded portion 38 of the first cylindrical member 40 when the first cylindrical member 40 and the second cylindrical member 50 are butted; , and the first tightening cylinder 56 in a fitted state.
a first sealing member 58 made of an O-ring interposed between opposing outer circumferential end surfaces of the connector 36 and the second connector 42 ; a second seal member 60 that is interposed between the inner periphery of the cable 20 and the outer periphery of the cable 20 contained in the second cylindrical member 50 and seals the gap therebetween; A third inner step part 64 that forms a retainer and a fourth threaded part 66 that is threaded into the second threaded part 44 of the second cylindrical member 50 are provided. The third inner step portion 64 allows the second seal member 60 to
A second tightening cylindrical body 68 that presses between the inner periphery of the second cylindrical member 50 and the outer periphery of the cable 20 is provided. Second inner step portion 52 of the first tightening cylinder 56
The inner periphery of the second threaded portion 4 of the second cylindrical member 50 is
4 and passes through in the axial direction.
It is said that A thread having the same nominal diameter and pitch as the second threaded portion 44 is formed in the second threaded portion 53 . Here, the electrical connection between the junction box 19 and the slider 16 is made by a relay table (not shown), but since this does not need to be attached or detached, the connection part can be made small by seal bonding. Third inner step portion 64 of the second tightening cylinder 68
The cable side member 62 with which the cable 20 is engaged is a flange provided at the end of a flexible electrical conduit 70 that encloses and protects the cable 20. The end surface of the second cylindrical member 50 on the cable 20 side is a contact surface that contacts the collar portion 62 of the flexible conduit 70 and electrically connects the second cylindrical member 50 and the flexible conduit 70. It is said to be 72. Further, the outer periphery of the first connector 36 is brought into contact with the inner periphery of the first cylindrical member 40 via a third seal member 74 made of an O-ring. The inner periphery of the end of the second cylindrical member 50 on the cable 20 side is formed into a tapered hole 76 that expands outward, and the second sealing member 60 forms a tapered hole 76 that expands outward.
It is a tapered cylindrical body that is fitted into the. That is, the second seal member 6 which is the tapered cylindrical body
0 is a collar portion 6 formed at the end of the flexible conduit 70
2 is pushed into the tapered hole 76, and thereby the inner portion of the tapered hole 76 is elastically crimped onto the outer periphery of the cable 20 and the inner periphery of the second cylindrical member 50, sealing the gap between the two. It is. The outer lines of the first and second tightening cylinders 56 and 68 are located inside (upper side in the figure) than the outer line furthest apart in the direction perpendicular to the moving direction of the connection box 19. That is, the movement loci 56A, 68A of the first and second tightening cylinders 56, 68 along the longitudinal direction are located above the movement locus 19C of the lower end in the diagram of the junction box 19, so that the connection box 19 is During movement, the first tightening cylinder 56 and the second tightening cylinder 68 are prevented from interfering with other parts. Next, the case of attaching the flexible cable 20 to the connection box 19 will be explained. First, the first tightening cylinder 56 and the second tightening cylinder 68 are loosely fitted into the flexible conduit tube 70 that includes the flexible cable 20, and then the first
The second inner stepped portion 52 of the tightening cylinder 56 is screwed into the third threaded portion 54 formed on the outer periphery of the end of the second cylindrical member 50, and the third threaded portion 54 , and is pushed out toward the second connector 42 side. In this state, the fourth part of the second tightening cylinder 68 is
The threaded portion 66 is connected to the second threaded portion 4 of the second cylindrical member 50.
4. At this time, the second tightening cylinder 68
The third inner step portion 64 of the flexible conduit 70
2 and presses it in the direction of the tapered hole 76. As a result, the second sealing member 60 fitted into the tapered hole 76 is strongly pressed between the inner periphery of the tapered hole 76 and the outer periphery of the end of the flexible cable 20, thereby firmly connecting the two. It will be sealed. Also, at this time, the flange 62 formed on the metal flexible conduit 70 is pressed against the contact surface 72 formed at the end of the second cylindrical member 50, thereby electrically connecting the two. Become. Next, the second connector 42 contained in the end of the second cylindrical member 50 is fitted into the first connector 36 contained in the first cylindrical member 40, and in this state,
The third screw portion 5 inside the first tightening cylinder 56
4 is screwed into the first threaded portion 38 on the outer periphery of the first cylindrical member 40. At this time, the second inner step 52 of the first tightening cylinder 56 axially engages the outer step 46 of the second cylindrical member 50 and presses it toward the first cylindrical member 40 . Therefore, the second cylindrical member 40 has a second
The end face of the cylindrical member 50 is firmly pressed. At this time, the first seal member 58 interposed between the opposing end surfaces of the first connector 36 and the second connector 42 is also pressed in the axial direction, and comes into pressure contact between them to seal them. In this case, the first cylindrical member 40 and the second cylindrical member 5
Since the relative displacement in the axial direction with respect to the first seal member 58 is regulated by the abutting end surfaces thereof, the pressing force of the first seal member 58 does not become excessive. Similarly, the third seal member 74 interposed between the outer periphery of the first connector 36 and the inner periphery of the first cylindrical member 40 also seals between the two, and the pressing force thereof does not become excessive. . In this embodiment, the third seal member 74 seals between the first connector 36 and the first cylindrical member 40, and between the first connector 36 and the second connector 42 and between these and the inner periphery of the second cylindrical member 50. 1st
By the sealing member 58, the flexible cable 2
0 and the second cylindrical member 50 is the second seal member 6
0, so that the transmission is transmitted along the outer periphery of the flexible conduit 70, or the first cylindrical member 40, the second cylindrical member 50, the first tightening cylinder 56, and the second tightening cylinder Oil, water, etc. adhering to the outer periphery of the body 68 are reliably prevented from penetrating into the connection box 19. Moreover, when the flexible cable 20 is to be replaced as necessary, it can be easily replaced by attaching and detaching the first tightening cylinder 56. Furthermore, the amount of outward protrusion of these cylindrical members and the tightening cylinder is determined by the movement locus 1 of the outline of the connection box 19.
Since they are located inside 9C, they will not collide with other parts when the connection box 19 is moved during measurement work or the like. Also, when the junction box 19 is attached to another member, the first and second
In order to enable the tightening cylinders 56 and 58 to rotate, the upward height of the connection box 19 in the figure must be greater than a certain value, but since the first tightening cylinder 56 has a small diameter, The height of the connection box 19 can be reduced. In particular, this allows the second threaded portion 44 of the second cylindrical member 50 to
This is because the outer diameter of the first tightening cylinder 56 is minimized by using screws of the same pitch and the same nominal diameter so that they can be threaded together and passed through. In this case, if the sacrificial threaded part 53 is not screwed on the inner periphery, when the first tightening cylinder 56 is assembled into the second cylindrical member 50, it will be inserted from the side where the second threaded part 44 is provided. In order to allow the second threaded portion 44 to pass through, for example, a hole needs to be bored in place of the second threaded portion 53, and this hole naturally has to have a larger diameter than the second threaded portion 44. When this hole has a large diameter, the first tightening cylinder 56
Since a predetermined wall thickness is required for fastening strength, the diameter of the first tightening cylinder 56 itself becomes correspondingly large, and furthermore, the outer diameter of the third threaded portion 54 also becomes large. The diameter of the first threaded portion 38 that is screwed into the third threaded portion 54 also becomes larger, and as a result, the first cylindrical member 40 also becomes larger. However, in this embodiment, since the sacrificial threaded portion 53 is provided, the inner diameter of the first tightening cylinder 56 is minimized, that is, the same diameter as the outer diameter of the second threaded portion 44, so that the second inner stage The diameter of the portion 52 and the third threaded portion 54 may be slightly larger than that of the sacrificial threaded portion 53, so that the first tightening cylinder 56
The outer diameter of the second tightening cylinder 68 can be made substantially the same as that of the second tightening cylinder 68, and the outer diameter can be minimized. As a result, the third screw portion 5
Since the first threaded portion 38 that is screwed into the connecting box 4 can be made smaller, and the first cylindrical member 40 can also be made smaller, the connection box 19 can be easily installed even in a narrow space. becomes possible. Furthermore, by doing the above, the first and second tightening cylinders 56 and 68 will not fall off from the second cylindrical member 50 even if they are removed from the first cylindrical member 40. Therefore, the loss etc. can be prevented. Furthermore, the flexible cable 20 of the second cylindrical member 50
The side end surface is a contact surface 72 that is electrically contacted with the flange 62 of the flexible conduit 70, and the flange 62
is firmly pressed by the second tightening cylinder 68, so that a shield earth can be reliably obtained. Further, in this embodiment, the flexible electrical conduit 72 is firmly tightened and fixed to the second cylindrical member 50 by the second tightening cylinder 68 via its collar 62, and can be easily attached and detached. Therefore, the conventional work such as soldering or soldering is not necessary, and the second sealing member 60 can ensure sealing. Here, it is also possible to use a commercially available tightening nut or the like as the first tightening cylinder 56 and the second tightening cylinder 68, but in this case, for example, since there is no threaded part 53, etc. , as described above, its outer diameter becomes large and it protrudes outward beyond the outline of the junction box 19. In the above embodiment, the second threaded portion 44 and the threaded portion 53 have the same pitch and the same nominal diameter, but the present invention is not limited to this. 53 may be threadedly engaged with the second threaded portion 44 and may be able to pass therethrough. Therefore, the nominal diameter of the sacrificial threaded portion 53 may be made slightly larger than that of the second threaded portion, or the thread pitch may be made an integral multiple or a reciprocal multiple thereof. Furthermore, the outer periphery of the first connector 36 and the first cylindrical member 4
The third seal member 74 seals between the inner periphery of the first cylinder member 40 and the second cylinder member 58, for example, depending on the position of the first seal member 58 and the By aligning the abutting end faces of member 50, first seal member 58 connects first and second connectors 36 and 42 with first
It is not necessarily necessary to provide this as long as a seal is formed between the four members and the second cylindrical members 40 and 50. Alternatively, it may be arranged between the abutting ends of the first cylindrical member 40 and the second cylindrical member 50. Furthermore, for example, if the first cylindrical member 40 also serves as the casing of the first connector 36,
The third seal member 74 becomes unnecessary. Further, the second cylindrical member 50 is not limited to an integral structure, but may have a structure divided as appropriate. For example, the portion holding the second connector 42 may be divided and screwed onto other portions. Further, although the second seal member 60 has a tapered cylindrical shape, the present invention is not limited to this, and may have other shapes. Furthermore, in the above embodiment, the second sealing member 60 is pressed by the collar portion 62 of the flexible conduit 70;
Any material that can be pressed by the 0-side member may be used. Therefore, in this case, the flexible cable 20 side member is configured to be pressed by the third inner member 64 of the second tightening cylinder 68. Further, in the above embodiment, the flexible cable 20 is covered by the flexible conduit 70, but the flexible conduit 70 is limited to a spiral shape as shown in the figure. Instead, it may be, for example, reticulated. Furthermore, the flexible electrical conduit 70 does not necessarily need to be made of metal, and may be made of, for example, synthetic resin. In this case, in order to ensure electrical shielding grounding of the junction box 19, it is necessary to provide another shielding grounding member. Further, although the above embodiment relates to a displacement detection device, the present invention is not limited to this, but the present invention is not limited to this, and the device moves within a certain range, and the flexible cable is connected to the connection box. It is generally applied to cable connection devices for removably connecting via. Therefore, for example, a cable connection device for connecting a flexible cable to a touch signal probe in a coordinate measuring machine, and a flexible cable for extracting signals from a sensor in an industrial robot to be connected to the industrial robot. It can be widely applied to cable connection devices and the like. Since the present invention is configured as described above, the device can be operated without increasing the volume or weight of the device, and without having to seal and bond the flexible cable and the connection box.
This has excellent effects in that it is possible to reliably prevent oil, water, etc. from entering the connection box, and it is also possible to extremely easily attach and detach the flexible cable. According to the inventor's experiments, no oil or water entered the connection box in a dipping test.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing a cable connection state in a conventional linear displacement detection device, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a cable connection according to the present invention. FIG. 4 is a sectional view showing the main parts of the embodiment of the apparatus, and FIG. 4 is a partially sectional front view showing the main parts of the embodiment in a removed state. 19...Connection box, 19A...Connection terminal, 20...
...Flexible cable, 36...First connector, 36
A, 42A... Connection side end, 38... First threaded part, 40... First cylindrical member, 42... Second connector, 44... Second threaded part, 46... Outer step part, 4
8...First inner stage part, 50...Second cylindrical member, 52
...Second inner step part, 53...Discarded screw part, 54...
...Third screw portion, 56...First tightening cylinder, 58
...first seal member, 60...second seal member,
62... Cable side member (flange), 64... Third
Inner step part, 66...Fourth screw part, 68...Second tightening cylinder, 70...Flexible conduit, 72...Contact surface, 74...Third seal member, 76...Tapered hole, 78 ...Seal member.

Claims (1)

[Claims] 1. A flexible cable protected by a flexible conduit tube is electrically connected detachably to the internal wiring of a device that moves within a certain range via a relay junction box. In the cable connection device, at least the vicinity of the connection part of the flexible cable of the connection box has a sealed structure except for the opening for electrical wiring; and the connection in the junction box is made through the opening for electrical wiring. a first with one electrical contact connected to the terminal;
a first cylindrical member that is formed integrally with the connection box, supports the first connector internally with its connection side end exposed, and has a first threaded portion formed on its outer periphery; a second connector that can be freely fitted into the first connector and is connected to the cable; and an end of the cable and a second connector connected to the second connector; The second connector is internally supported except for the connection side end, and when the second connector is fitted to the first connector, the end is butted against the end of the first cylindrical member, and the outer periphery near the cable side end is a second threaded portion having a smaller diameter than the first threaded portion formed in;
an outer stepped portion having a larger diameter than the second threaded portion and a smaller diameter than the first threaded portion formed on the outer periphery near the end on the second connector side; a second cylindrical member, the second cylindrical member having a first inner step having a smaller diameter than the second connector and regulating movement of the second connector in the cable direction;
The cable is fitted on the outside of the cylindrical member, and the inner periphery of the cable side end can pass through the second threaded part and has a smaller diameter than the outer step, and by abutting against the outer step, the inner periphery of the cable side end can pass through the second thread. 2. A second inner step that prevents the connector from coming off in the direction of the end thereof, and can be screwed into the first threaded portion of the first cylindrical member when the first cylindrical member and the second cylindrical member are butted together. the third formed
a first tightening cylindrical body comprising a threaded portion; a first a first sealing member that seals the connector and the second connector; and a space between the inner periphery of the second cylindrical member and the outer periphery of the cable enclosed in the second cylindrical member at the cable-side end position of the second cylindrical member; a second sealing member interposed between the two and sealing the space between the two; a third inner step portion that engages with the cable side member to prevent the cable from coming off; and a third inner step portion that is screwed into the second threaded portion of the second cylindrical member. a fourth threaded portion,
When the second seal member is screwed into the fourth screw portion, the third inner step portion causes the second seal member to connect to the second seal member.
a second tightening cylindrical body that presses between the inner periphery of the cylindrical member and the outer periphery of the cable; the inner periphery of the second inner stepped portion of the first tightening cylindrical body is threaded with the fourth threaded portion of the second cylindrical member; The cable connection device is characterized in that the cable connection device is made into a sacrificial screw portion that passes through the cable connection device in the axial direction. 2. A claim in which the cable-side member with which the third inner step of the second tightening cylinder engages is a flange provided at the end of the flexible conduit that encloses and protects the cable. Cable connection device according to item 1. 3. The cable side end surface of the second cylindrical member is
The cable connection device according to claim 2, wherein the cable connection device is a contact surface that contacts the collar portion and electrically connects the second cylindrical member and the flexible conduit. 4. The cable connection device according to claim 1, wherein the first connector has an outer periphery in contact with an inner periphery of the first cylindrical member via a third sealing member. 5. The inner periphery of the cable side end of the second cylindrical member is formed into a tapered hole that expands outward, and the second cylindrical member
5. The cable connection device according to claim 1, wherein the sealing member is a tapered cylindrical body fitted into the tapered hole. 6. Any one of claims 1 to 5, wherein the second cylindrical member is of a split type in which a portion holding the second connector is detachably attached to the main body side portion including the outer step portion via a sealing member. Cable connection device as described in . 7 The outline of the first and second tightening cylinders is as follows:
7. According to any one of claims 1 to 6, the outer shape of the connection box is located closer to the center of the connection box than an outer line of the connection box that is furthest from the center of the connection box in a direction perpendicular to the movement direction of the connection box. Cable connection device.