JP7420393B2 - Terminal protection structure - Google Patents

Description

The present invention relates to a terminal protection structure for protecting terminal portions of electrical components such as relay sockets and terminal blocks mounted on a DIN rail.

A terminal protection structure for protecting a terminal portion of an electrical component of this type is disclosed in, for example, Patent Document 1. The terminal protection structure (terminal block with cover) described in Patent Document 1 includes a terminal block, mounting pieces that are elastically engaged with barriers (partition walls) at both ends of the terminal block, and a cover that is attached to the mounting pieces. We are prepared. The cover is composed of a cover and an end member, and the terminal portion of the terminal block is covered with the cover by attaching the end members that are fitted and connected to both ends of the cover to the mounting pieces. The cover is made of an extruded transparent resin material, and has a partially cylindrical fitting part and an insertion part formed on the lower surface side of its front and rear edges. One side of the end member is provided with a columnar protrusion that fits into the front and rear fitting parts, and the other side is provided with a shaft part that is fitted into one of the front and rear holes of the mounting piece, and a columnar projection that fits into the front and rear holes of the mounting piece. A convex portion that engages with is provided.

Japanese Patent Application Publication No. 06-196215

According to the covered terminal block described in Patent Document 1, by covering the terminal part of the terminal block with a cover, short-circuit accidents of conductive wires connected to the terminal part, electric shock accidents caused by accidentally touching the terminal part, etc. can be prevented. It can be prevented. However, since the cover is supported by elastically engaging the mounting piece with the grooves and protrusions provided on the barrier of the terminal block, it cannot be applied to general terminal blocks that do not have grooves or protrusions. In addition, for example, when protecting a relay socket that has terminals at both ends in the vertical direction and a relay mounted in the center vertically in a protruding manner, one cover can protect the terminals in two places, the top and bottom. Since it is impossible to protect the terminal block, it is necessary to protect the terminal part with two covers, but in that case, it is necessary to prepare a mounting piece with a structure different from that of the terminal block, and in this respect as well. Another problem was that it lacked versatility.

An object of the present invention is to provide a highly versatile terminal protection structure that can reliably protect the terminal portion of an electrical component with a cover, regardless of the shape of the electrical component mounted on a DIN rail. purpose. Another object of the present invention is to provide a terminal protection structure in which electrical components to be protected are provided not only in a terminal block in which terminals are arranged centrally in the vertical direction, but also in terminal blocks in which electrical components to be protected are arranged at both ends in the vertical direction. To enable a cover for protecting a terminal part to be attached without any trouble even when the relay socket is a distributed relay socket.

The present invention is directed to a terminal protection structure for protecting terminal portions 5 of a plurality of electrical components 2 mounted on a DIN rail 1 running in the left-right direction. The terminal protection structure includes a pair of left and right cover brackets 7, 7 that are attached to the DIN rail 1 with a plurality of electrical components 2 sandwiched between them, and a terminal protection structure that is attached in a bridge-like manner between the left and right cover brackets 7, 7 to protect the electrical components. A cover 8 covers the outer surface of the terminal portion 5 of the component 2. Each cover bracket 7 includes a fixing part 10 that is responsible for mounting and fixing it on the DIN rail 1, a base part 11 located in front of the fixing part 10, and a pair of upper and lower cover support arms 12 extending vertically from the base part 11. 12. Cover mounting portions 18 are provided above and below each cover support arm 12 to which the cover 8 is fitted. The cover 8 includes a narrow first cover 8A and a wide second cover 8B, and each cover 8A and 8B includes a main cover wall 22 that is received and supported by a cover support arm 12, An engagement wall 23 is formed in a continuous curve on the upper and lower edges of the cover attachment portion 18 and is elastically engaged with the cover attachment portion 18 . Then, there is a first form in which the first covers 8A, 8A are engaged and attached to the upper and lower cover support arms 12, 12, respectively, and a second cover is provided so as to straddle the upper and lower cover support arms 12, 12. 8B is characterized in that it is configured so that it can take a second form in which it is engaged and attached to the cover support arms 12.

A cover receiving surface 17 that receives the main cover wall 22 is formed on the cover supporting arm 12, and a regulating piece 19 that receives the side end of the cover 8 attached to the cover supporting arm 12 protrudes from the outer end of the cover receiving surface 17 in the left and right direction. It is set up.

A fixing part 10, a base part 11, and cover support arms 12, which constitute the cover bracket 7, are integrally molded. Legs 14, 14 are formed.

The elastic leg 14 is provided with an engaging claw portion 15 that clamps the rail flange 1c together with the joint portion 13, and a release piece 16 for releasing the engaged state between the engaging claw portion 15 and the rail flange 1c. It is being

The cover bracket 7 includes a base portion 11, cover support arms 12, 12 integrally formed with the base portion 11, and a fixing portion 10 configured separately from the base portion 11. The fixing part 10 includes a first metal fitting 27 and a second metal fitting 28 that sandwich the rail flange 1c of the DIN rail 1 from the front and rear directions, and a screw body 29 that operates the two metal fittings 27 and 28 to move toward and away from each other. The base portion 11 includes a joint wall 38 that is joined to the front wall of the second metal fitting 28 , and a thread groove 40 that engages with the screw body 29 is formed in the joint wall 38 . The first metal fitting 27 and the second metal fitting 28 are temporarily assembled to the rail flange 1c of the DIN rail 1, and the joint wall 38 of the base part 11 is joined to the front wall of the second metal fitting 28, so that the thread groove 40 is connected to the screw body. By tightening the screw body 29 while engaged with the screw body 29, the fixing part 10 is fixed to the DIN rail 1, and at the same time, the base part 11 is fixed to the fixing part 10.

The cover bracket 7 includes a base portion 11, cover support arms 12, 12 integrally formed with the base portion 11, and a fixing portion 10 configured separately from the base portion 11. The fixing portion 10 includes a support 43 fixed to the rail bottom wall 1a of the DIN rail 1, and a screw body 45 screwed into the support 43. The base portion 11 includes a joint wall 38 that is joined to the support column 43, and a thread groove 40 that engages with a screw body 45 is formed in the joint wall 38. The base portion 11 is attached to the fixed portion 10 by screwing the screw body 45 into the column 43 with the joint wall 38 of the base portion 11 being joined to the front end of the support column 43 and the thread groove 40 engaging with the screw body 45. Fixed.

As in the present invention, the terminal protection structure is attached to a pair of left and right cover brackets 7, 7 that are attached to the DIN rail 1 with a plurality of electrical components 2 sandwiched therebetween, and to the left and right cover brackets 7, 7 in a bridging manner. and a cover 8 that covers the outer surface of the terminal portion 5 of the electrical component 2, the cover brackets 7, 7 are attached to the DIN rail 1, and then the cover 8 is attached to these cover brackets 7, 7. This allows the cover 8 to be installed on the DIN rail 1. As described above, according to the present invention, since the cover 8 can be installed regardless of the configuration of the electrical component 2, a terminal protection structure with excellent versatility can be obtained.

As in the terminal protection structure of the present invention, the first form in which the first covers 8A, 8A are engaged with and attached to the upper and lower cover support arms 12, 12, respectively, and the first form in which the first covers 8A, 8A are fitted over the upper and lower cover support arms 12, 12, respectively. In addition, if a second form is adopted in which one second cover 8B is engaged with and attached to the cover support arms 12, the terminal portion 5 of the electrical component 2 is placed in the exposed position. By adopting a suitable configuration, the terminal portion 5 of each electrical component 2 can be reliably protected. Specifically, when the electrical component 2 is a relay socket 2A in which the terminal parts 5 are distributed at both ends in the vertical direction, by adopting the first form, each of the upper and lower cover support arms 12, 12 The terminal portions 5 of the relay sockets 2A arranged above and below can be protected by the first covers 8A, 8A that are engaged with and attached to the terminals. In addition, when the electrical component 2 is a terminal block 2B in which the terminal portion 5 is arranged centrally in the vertical direction, the second form is adopted so that the electrical component 2 is engaged so as to straddle the upper and lower cover support arms 12. The second cover 8B attached together can protect the terminal portion 5 of the terminal block 2B located at the center in the vertical direction. Therefore, there is no need to prepare cover brackets 7 with different structures depending on the positions of the terminal portions 5 of the electrical component 2, and a terminal protection structure with excellent versatility can be obtained.

When the cover support arm 12 is formed with a cover receiving surface 17 for receiving the main cover wall 22, and the regulating piece 19 is provided protruding from the outer end of the cover receiving surface 17, the first cover 8A is formed on the upper and lower cover support arms 12. When the first cover 8A is engaged and attached, both ends of the first cover 8A are received by the regulating pieces 19, so even if a horizontal external force is applied to the first cover 8A, the first cover 8A will not shift laterally. Movement can be regulated. Similarly, when the second cover 8B is engaged and attached to the upper and lower cover support arms 12, both ends of the second cover 8B are received by the regulating pieces 19, so that a lateral external force acts on the second cover 8B. Even in such a case, it is possible to prevent the second cover 8B from shifting laterally. As described above, since the mounting posture of the first cover 8A and the second cover 8B with respect to the cover bracket 7 can always be maintained in an appropriate state, a terminal protection structure with excellent safety can be obtained.

A fixing part 10, a base part 11, and cover support arms 12, which constitute the cover bracket 7, are integrally molded. When the legs 14 are formed, the entire cover bracket 7 including the base portion 11 and the cover support arms 12 can be attached to the DIN rail simply by elastically engaging the elastic legs 14 with the rail flange 1c. It can be installed on 1. Therefore, the work of attaching the cover bracket 7 to the DIN rail 1 can be easily performed with less effort.

The elastic leg 14 is provided with an engaging claw portion 15 that clamps the rail flange 1c together with the joint portion 13, and a release piece 16 for releasing the engaged state between the engaging claw portion 15 and the rail flange 1c. If the elastic legs 14 are connected to the rail flange 1c, simply by press-fitting the other engaging claw 15 to the rail flange 1c while one engaging claw 15 is engaged with the rail flange 1c. This makes it possible to mount the cover bracket 7 on the DIN rail 1 more easily. Furthermore, when necessary, the engagement state between the engagement claw portion 15 and the rail flange 1c can be released by pulling either the upper or lower release piece 16 in a direction away from the rail flange 1c. The cover bracket 7 can be easily removed from the DIN rail 1.

The cover bracket 7 can be made up of a base portion 11, cover support arms 12, 12 integrally formed on the base portion 11, and a fixing portion 10 configured separately from the base portion 11. . According to this, by appropriately selecting the fixing portions 10 having different longitudinal lengths, the longitudinal position of the cover 8 attached to the cover support arms 12 can be adjusted according to the difference in the longitudinal length of the electrical component 2. I can do it. Alternatively, after fixing the base portion 11 and the cover support arms 12, 12 to the fixing portion 10 attached to the DIN rail 1, the first cover 8A or the second cover 8B may be attached to the cover support arms 12, 12. Therefore, the terminal protection structure is assembled to the DIN rail 1 in the same manner as the case where the cover bracket 7, in which the fixing part 10, the base part 11, and the cover support arms 12 are integrated, is directly assembled to the DIN rail 1. A series of tasks can be performed easily and with less effort.

The fixing part 10 includes a first metal fitting 27 and a second metal fitting 28 that sandwich the rail flange 1c of the DIN rail 1 from the front and back directions, and a screw body 29 that operates the two metal fittings 27 and 28 toward and away from each other. 11 includes a joint wall 38 that is joined to the front wall of the second metal fitting 28, a thread groove 40 that engages with the screw body 29 is formed in the joint wall 38, and the first metal fitting 27 and the second metal fitting 28 are connected to each other. is temporarily assembled to the rail flange 1c of the DIN rail 1, and the joint wall 38 of the base part 11 is joined to the front wall of the second metal fitting 28, and the screw body is assembled with the thread groove 40 engaged with the screw body 29. By tightening 29, the fixing part 10 can be fixed to the DIN rail 1, and the base part 11 can be fixed to the fixing part 10 at the same time. According to this, the cover bracket 7 can be easily and quickly attached to the DIN rail 1 by simply tightening the screw body 29 after holding the fixing part 10 and the base part 11 in a predetermined state. . Furthermore, since the fixing part 10 is fixed to the DIN rail 1 with the upper and lower rail flanges 1c being sandwiched between the first metal fitting 27 and the second metal fitting 28, the fixing part 10 can be more firmly fixed, and the cover bracket 7 and The cover 8 can be supported in a more stable state.

The cover bracket 7 consists of a base part 11, cover support arms 12, 12 integrally formed on the base part 11, and a fixing part 10 configured separately from the base part 11. The base part 11 includes a support 43 fixed to the rail bottom wall 1a of the DIN rail 1 and a screw body 45 screwed into the support 43. A threaded groove 40 that engages with the body 45 is formed, the joint wall 38 of the base portion 11 is joined to the front end of the column 43, and with the threaded groove 40 engaged with the threaded body 45, the threaded body 45 is inserted into the column 43. By screwing the base portion 11 into the fixing portion 10, a configuration can be adopted in which the base portion 11 is fixed to the fixing portion 10. This also allows the cover bracket 7 and the cover 8 to be attached easily and quickly. In addition, since the fixing part 10 is constituted by the pillar 43 and the screw body 45, which have a simple structure, the cost of the fixing part 10 can be reduced, and the overall cost of the terminal protection structure can be reduced accordingly.

FIG. 1 is a vertical side view of a terminal protection structure according to a first embodiment of the present invention. FIG. 3 is a partially cutaway front view of the terminal protection structure. FIG. 2 is an exploded perspective view of the DIN rail and terminal protection structure. FIG. 3 is an exploded cross-sectional view of main parts showing the assembly structure of the cover bracket. FIG. 3 is an exploded sectional view of main parts showing the assembly structure of the first cover. FIG. 6 is a vertical side view of the second cover attached to the cover bracket. It is an exploded perspective view of the terminal protection structure concerning a 2nd embodiment of the present invention. It is a longitudinal side view of the terminal protection structure in 2nd Embodiment. It is an exploded perspective view of the terminal protection structure concerning a 3rd embodiment of the present invention.

(First Embodiment) FIGS. 1 to 6 show a first embodiment of a terminal protection structure according to the present invention. In this embodiment, front and back, left and right, and up and down follow the cross arrows shown in FIGS. 1 and 3 and the front and back, left and right, and up and down indications written near each arrow. In FIG. 2, reference numeral 1 indicates a DIN rail that is fixed to a fixed wall or rack frame of a panel such as a distribution board, a switchboard, or a control board and runs in the left-right direction. Electrical components 2 such as a relay socket 2A and a terminal block 2B are selectively mounted on the DIN rail 1. Specifically, as shown in FIG. 1, a plurality of relay sockets 2A (electrical components 2) and a relay 3 are mounted on the DIN rail 1, or as shown in FIG. (Electrical component 2) is installed. As shown in FIGS. 2 and 3, terminal portions 5 each having four terminal screws 4 are exposed forward on the upper and lower sides of the component body of each relay socket 2A. are separated by a partition wall (barrier) 6. Also in the terminal block 2B shown in FIG. 6, a terminal portion 5 provided with a terminal screw is exposed forward. As shown in FIGS. 1 to 3, the DIN rail 1 is made of extruded aluminum material, and includes a rail bottom wall 1a that is long from side to side, a rail front wall 1b that continues from the top and bottom of the rail bottom wall 1a, and each rail. It is integrally provided with a rail flange 1c extending upward and downward from the front wall 1b. Elongated screw holes 1d are formed at regular intervals in the rail bottom wall 1a.

A terminal protection structure is installed on the DIN rail 1 in order to prevent a short circuit of the conductive cord connected to the terminal portion 5 of the electrical component 2 or an electric shock due to contact with the terminal portion 5. In FIG. 2, the terminal protection structure includes a pair of left and right cover brackets 7, 7 mounted on the DIN rail 1 with three relay sockets 2A sandwiched between them, and a bridge structure between the left and right cover brackets 7, 7. A cover 8 is attached to the terminal portion 5 to cover the outer surface of the terminal portion 5.

As shown in FIG. 3, the cover bracket 7 includes a fixing part 10 that is responsible for mounting and fixing to the DIN rail 1, a base part 11 located in front of the fixing part 10, and a pair of upper and lower parts that extend from the base part 11 in the vertical direction. It is made of a plastic molded product that integrally includes cover support arms 12. The fixed part 10 is formed with a joint part 13 that spans between the rail flanges 1c of the DIN rail 1, and above and below the joint part 13 are provided elastic legs 14 that engage and disengage from the rail flanges 1c. Each elastic leg 14 has an inverted U-shaped engagement claw portion 15 that works with the joint portion 13 to sandwich the upper and lower ends of the rail flange 1c back and forth, and an engagement claw portion 15 between the rail flange 1c and the engagement claw portion 15. A release piece 16 for releasing the state is provided (see FIG. 1). A cover receiving surface 17 for supporting the cover 8 is formed on the cover support arm 12, and cover mounting portions 18 for engaging and mounting the cover 8 are formed in the upper and lower portions of the cover support arm 12 in a partial arc shape. There is. Furthermore, a regulating piece 19 is provided protruding from the outer end of the cover receiving surface 17 to receive the side end of the cover 8 attached to the cover support arm 12 . The pair of left and right cover brackets 7 are formed in the same shape.

The cover 8 has a plate-shaped main cover wall 22 that is received and supported by the cover support arm 12, and is curved continuously from the upper and lower edges of the main cover wall 22, and is elastically engaged with the cover mounting portion 18 of the cover bracket 7. It is made of an extrusion molded product made of a transparent plastic material and is integrally provided with an engaging wall 23 to be fitted. The cover 8 includes a narrow first cover 8A and a wide second cover 8B, depending on the exposure status of the terminal portion 5 of the electrical component 2 (2A, 2B) mounted on the DIN rail 1. One of the covers 8A and 8B is attached to the cover bracket 7.

As shown in FIG. 1, when the electrical component 2 to be mounted on the DIN rail 1 is a relay socket 2A, after the cover bracket 7 is assembled to the DIN rail 1, a narrow The first covers 8A are engaged and mounted, respectively, and the front surfaces of the terminal portions 5 exposed at the top and bottom of the component body of the relay socket 2A are covered with the first covers 8A. On the other hand, as shown in FIG. 6, when the electrical component 2 to be mounted on the DIN rail 1 is the terminal block 2B, after the cover bracket 7 is assembled to the DIN rail 1, the wide second cover 8B is It is attached to the cover support arm 12 of. Specifically, while straddling both cover support arms 12, the upper engagement wall 23 is engaged and attached to the upper cover mounting portion 18 of the upper cover support arm 12, and the lower engagement wall 23 is The second cover 8B is engaged with and attached to the lower cover mounting portion 18 of the lower cover support arm 12 to cover the front surface of the terminal portion 5 exposed on the front surface of the component body of the terminal block 2B. As described above, in the terminal protection structure of the present embodiment, the first form in which the narrow first cover 8A is engaged and attached to the upper and lower cover support arms 12, 12, and the upper and lower cover support arms 12, 12, 12, and a second form in which one wide second cover 8B is engaged and attached so as to straddle the second cover 8B.

When the narrow first cover 8A is fitted onto the upper and lower cover support arms 12, 12, as shown in FIG. Since the first cover 8A is received by the regulating piece 19, even if a horizontal external force is applied to the first cover 8A, the first cover 8A can be prevented from shifting laterally. Similarly, when the wide second cover 8B is engaged and attached to the upper cover attachment part 18 of the upper cover support arm 12 and the lower cover attachment part 18 of the lower cover support arm 12, the second Since both ends of the cover 8B are received by the regulating pieces 19 provided on the outer ends of the cover receiving surface 17, even if a horizontal external force is applied to the second cover 8B, the second cover 8B will not shift laterally. Movement can be controlled. Therefore, the mounting posture of the first cover 8A and the second cover 8B with respect to the cover bracket 7 can always be maintained in an appropriate state, and safety can be improved.

As described above, in this embodiment, the terminal protection structure is comprised of a pair of left and right cover brackets 7, which are mounted on the DIN rail 1 with a plurality of electrical components 2 sandwiched therebetween, and a pair of left and right cover brackets 7, Since the cover 8 is attached to the DIN rail 1 in a bridging manner and covers the outer surface of the terminal portion 5 of the electrical component 2, the cover brackets 7 and 7 are attached to the DIN rail 1, and then the cover brackets 7 and 7 are attached to each other. By attaching the cover 8 to the DIN rail 1, the cover 8 can be installed on the DIN rail 1. As described above, since the cover 8 can be installed regardless of the configuration of the electrical component 2, a terminal protection structure with excellent versatility can be obtained.

In addition, in the present embodiment, a first form in which the first cover 8A is engaged with and attached to each of the upper and lower cover support arms 12, and a first form in which the first cover 8A is fitted so as to straddle the upper and lower cover support arms 12, 12, respectively. Since the second cover 8B of the book can be attached to the cover support arms 12 and 12 in a second form, the terminal portion 5 of the electrical component 2 (2A and 2B) can be attached to the exposed position. By adopting a suitable configuration, the terminal portion 5 of each electrical component 2 (2A, 2B) can be reliably protected. Therefore, there is no need to prepare cover brackets 7 with different structures depending on the positions of the terminal portions 5 of the electrical component 2, and a terminal protection structure with excellent versatility can be obtained.

Since the regulating pieces 19 are provided protrudingly on the outer ends of the cover receiving surface 17, when the first cover 8A is engaged and attached to the upper and lower cover support arms 12, both ends of the first cover 8A are received by the regulating pieces 19. It can be stopped. Similarly, when the second cover 8B is engaged and attached to the upper and lower cover support arms 12, both ends of the second cover 8B are received by the regulating pieces 19. As described above, according to the present embodiment, even when a horizontal external force acts on the cover 8 (8A, 8B), it is possible to prevent the cover 8 (8A, 8B) from shifting sideways, 8B) can always be maintained in an appropriate mounting position with respect to the cover bracket 7, so a terminal protection structure with excellent safety can be obtained.

The fixing part 10, the base part 11, and the cover support arms 12, which constitute the cover bracket 7, are integrally molded, and the fixing part 10 has a pair of upper and lower elastic legs 14 that elastically engage with the rail flange 1c of the DIN rail 1. 14, the entire cover bracket 7 including the base portion 11 and cover support arms 12 can be mounted on the DIN rail 1 by simply elastically engaging these elastic legs 14 with the rail flange 1c. be able to. Therefore, the work of attaching the cover bracket 7 to the DIN rail 1 can be easily performed with less effort.

The elastic leg 14 is provided with an engaging claw part 15 that clamps the rail flange 1c together with the joint part 13, and a release piece 16 for releasing the engaged state between the engaging claw part 15 and the rail flange 1c. Therefore, the elastic leg 14 can be attached to the rail flange 1c by simply press-fitting and engaging the other engaging claw 15 with the rail flange 1c while one engaging claw 15 is engaged with the rail flange 1c. This makes it possible to mount the cover bracket 7 on the DIN rail 1 more easily. Furthermore, when necessary, the engagement state between the engagement claw portion 15 and the rail flange 1c can be released by pulling either the upper or lower release piece 16 in a direction away from the rail flange 1c. The cover bracket 7 can be easily removed from the DIN rail 1.

(Second Embodiment) FIGS. 7 and 8 show a second embodiment of the terminal protection structure according to the present invention. In this embodiment, the cover bracket 7 is composed of a bracket piece 25 that integrally includes a base part 11 and cover support arms 12, and a fixing part 10 that is configured separately from the bracket piece 25. This embodiment differs from the first embodiment in that the base part 11 is indirectly attached to the DIN rail 1 via the fixing part 10.

As shown in FIGS. 7 and 8, the fixing part 10 of the present embodiment includes a first metal fitting 27 and a second metal fitting 28 that sandwich the rail flange 1c of the DIN rail 1 in the front and back, and also allows the two metal fittings 27 and 28 to be brought together and separated. It includes a fixing screw (screw body) 29 and a nut 30 to be operated. The first metal fitting 27 is provided with a rail groove 27a that receives the rail flange 1c, and the second metal fitting 28 is provided with a pressing portion 28a that straddles the rail flange 1c.

As shown in FIG. 7, the bracket piece 25 includes a base portion 11 that is fastened and fixed to the second metal fitting 28 of the fixed portion 10 with a fixing screw 29, and cover support arms 12 that extend upward and downward from the base portion 11. Consists of a plastic molded product with integral parts. The base portion 11 is provided with a joint wall 38 that is joined and fixed to the front wall of the second metal fitting 28, and a locking wall 39 that is received on the side surface of the second metal fitting 28 and has an L-shaped cross section. A thread groove 40 for receiving the previous fixing screw 29 is formed in the upper and lower center of 38. Other points are the same as those in the first embodiment, so the same members are given the same reference numerals and their explanations will be omitted.

In the terminal protection structure of this embodiment, as shown in FIG. 38 is inserted between the front wall of the second metal fitting 28 and the operating head of the fixing screw 29, and the thread groove 40 is engaged with the screw shaft of the fixing screw 29. Furthermore, with the locking wall 39 of the base part 11 joined to the side wall of the second metal fitting 28, the fixing screw 29 and nut 30 are tightened to fix the fixing part 10 to the DIN rail 1, and at the same time, the bracket piece 25 is It is fixed to the fixing part 10. The pressing portion 28a of the second metal fitting 28 in this state is pressed against the rail flange 1c and relatively draws the first metal fitting 27, so that the fixing portion 10 can be firmly fixed to the rail flange 1c. In this state, by engaging and attaching the narrow first cover 8A to the upper and lower cover support arms 12, the front surface of the terminal portion 5 exposed on the upper and lower sides of the component body of the relay socket 2A is covered with the first cover 8A. Can be covered. In addition, as in the first embodiment, by engaging and attaching the wide second cover 8B to both cover support arms 12 so as to straddle the upper and lower cover support arms 12, the front surface of the component body of the terminal block 2B is The terminal portion 5 that is exposed can be covered with the second cover 8B.

As described above, in the terminal protection structure of this embodiment, the cover bracket 7 is configured separately from the base portion 11, including the base portion 11, the cover support arms 12, 12 integrally molded on the base portion 11. Since the base part 11 and the cover support arms 12 are configured to have a fixed part 10, the base part 11 and the cover support arms 12 can be indirectly attached to the DIN rail 1 via the fixed part 10. Therefore, according to this terminal protection structure, by appropriately selecting the fixing portions 10 having different front and rear lengths, the front and rear positions of the cover 8 attached to the cover support arms 12 can be adjusted according to the front and rear lengths of the electrical component 2. It can be easily adjusted accordingly. Alternatively, after fixing the base portion 11 and the cover support arms 12, 12 to the fixing portion 10 attached to the DIN rail 1, the first cover 8A or the second cover 8B may be attached to the cover support arms 12, 12. Therefore, the terminal protection structure is assembled to the DIN rail 1 in the same manner as the case where the cover bracket 7, in which the fixing part 10, the base part 11, and the cover support arms 12 are integrated, is directly assembled to the DIN rail 1. A series of tasks can be performed easily and with less effort.

In the terminal protection structure of this embodiment, the first metal fitting 27 and the second metal fitting 28 are temporarily assembled to the rail flange 1c of the DIN rail 1, and the joint wall 38 of the base portion 11 is attached to the front wall of the second metal fitting 28. By joining them together and tightening the fixing screw 29 in a state where the thread groove 40 engages with the fixing screw 29, the fixing part 10 can be fixed to the DIN rail 1 and the base part 11 can be fixed to the fixing part 10 at the same time. can. As described above, according to this terminal protection structure, the cover bracket 7 can be attached to the DIN rail 1 by simply tightening the fixing screw 29 after holding the fixing part 10 and the base part 11 in a predetermined state. The assembly can be easily and quickly performed. Furthermore, since the fixing part 10 is fixed to the DIN rail 1 with the upper and lower rail flanges 1c being sandwiched between the first metal fitting 27 and the second metal fitting 28, the fixing part 10 can be more firmly fixed, and the cover bracket 7 and The cover 8 can be supported in a more stable state.

(Third Embodiment) FIG. 9 shows a cover bracket 7 constituting the terminal protection structure of the present invention. The fixing part 10 according to the third embodiment includes a hexagonal shaft-shaped support 43 that is a commercially available product, a nut 44 that fastens and fixes the support 43 to the rail bottom wall 1a of the DIN rail 1, and a nut 44 that is screwed into the front end of the support 43. It is composed of a set screw (screw body) 45. The bracket piece 25 is the same as in the second embodiment.

In this third embodiment, as shown in FIG. 9, the screw shaft of the support 43 is inserted into the screw hole 1d of the DIN rail 1, and fixed to the rail bottom wall 1a with a nut 44, thereby fixing the fixing part 10. It can be fixed to the DIN rail 1. At this time, the support 43 is fixed so that one of the opposing sides of the hexagonal shaft-shaped support 43 is vertical. Next, the joint wall 38 of the base portion 11 is inserted between the operating head of the set screw 45 screwed into the support column 43 and the front end of the support column 43, and the thread groove 40 is engaged with the screw shaft of the set screw 45. . Furthermore, the bracket piece 25 is fixed to the fixing part 10 by tightening the set screw 45 with the locking wall 39 of the base part 11 applied to the vertically opposing sides of the support column 43. Finally, by engaging and attaching the two narrow first covers 8A or the wide second covers 8B to the upper and lower cover support arms 12 of the bracket piece 25, the upper and lower terminals of the component body of the relay socket 2A are connected. The part 5 can be covered with two first covers 8A, or the terminal part 5 on the front side of the component body of the terminal block 2B can be covered with a wide second cover 8B.

As described above, according to the terminal protection structure of the third embodiment, after the support post 43 is fixed to the rail bottom wall 1a, the joint wall 38 is joined to the front end of the support support 43, and the screw groove 40 is connected to the set screw. The bracket piece 25 can be fixed to the fixing part 10 by screwing the set screw 45 into the support post 43 in a state where it is engaged with the bracket part 45. Therefore, the cover bracket 7 consisting of the fixing part 10 and the bracket piece 25 can be easily and quickly attached. I can do it. In addition, since the fixing part 10 is constituted by the pillar 43 and the set screw 45, which have a simple structure, the cost of the fixing part 10 can be reduced, and the overall cost of the terminal protection structure can be reduced accordingly.

1 DIN rail 1c Rail flange 2 Electrical parts 2A Relay socket (electrical parts)
2B Terminal block (electrical parts)
5 Terminal portion 7 Cover bracket 8 Cover 8A First cover 8B Second cover 10 Fixed portion 11 Base portion 12 Cover support arm 13 Joint portion 14 Elastic leg 17 Cover receiving surface 18 Cover mounting portion 19 Regulating piece 22 Main cover wall 23 Engagement Wall 25 Bracket piece 27 First metal fitting 28 Second metal fitting 29 Fixing screw (screw body)
38 Joint wall 43 Support column 45 Set screw (screw body)

Claims (6)

A terminal protection structure for protecting terminal portions (5) of a plurality of electrical components (2) mounted on a DIN rail (1) running in the left-right direction,
The terminal protection structure is constructed between a pair of left and right cover brackets (7, 7) that are attached to the DIN rail (1) with multiple electrical components (2) sandwiched between them, and the left and right cover brackets (7, 7). a cover (8) that is attached in a bridge-like manner to the electrical component (2) and covers the outer surface of the terminal portion (5) of the electrical component (2);
Each cover bracket (7) has a fixing part (10) that is responsible for fixing the mounting on the DIN rail (1), a base part (11) located in front of the fixing part (10), and a vertical direction from the base part (11). a pair of upper and lower cover support arms (12, 12) extending from the
Cover mounting portions (18) are provided at the top and bottom of each cover support arm (12) to which the cover (8) is engaged and mounted;
The cover (8) includes a narrow first cover (8A) and a wide second cover (8B), and each cover (8A, 8B) is received and supported by a cover support arm (12). It includes a main cover wall (22), and an engagement wall (23) that is continuously curved at the upper and lower edges of the main cover wall (22) and is elastically engaged with the cover attachment part (18),
A first form in which the first cover (8A, 8A) is engaged and attached to each of the upper and lower cover support arms (12, 12), and one cover that straddles the upper and lower cover support arms (12, 12). A terminal protection structure characterized in that the second cover (8B) is configured to be able to adopt a second form in which the second cover (8B) is engaged with and attached to the cover support arms (12, 12). A cover receiving surface (17) for receiving the main cover wall (22) is formed on the cover supporting arm (12), and a cover ( The terminal protection structure according to claim 1, further comprising a protruding regulating piece (19) for receiving a side end of the terminal protection structure. The fixing part (10), base part (11), and cover support arms (12, 12) that constitute the cover bracket (7) are integrally molded,
3. The terminal protection structure according to claim 1, wherein the fixed part (10) is formed with a pair of upper and lower elastic legs (14, 14) that elastically engage with the rail flange (1c) of the DIN rail (1). The elastic leg (14) has an engaging claw part (15) that clamps the rail flange (1c) together with the joint part (13), and the engaged state of the engaging claw part (15) and the rail flange (1c). 4. The terminal protection structure according to claim 3, further comprising a release piece (16) for releasing the terminal. The cover bracket (7) includes a base portion (11), cover support arms (12, 12) integrally formed with the base portion (11), and a fixing portion configured separately from the base portion (11). (10)
The fixing part (10) operates the first metal fitting (27) and the second metal fitting (28) that sandwich the rail flange (1c) of the DIN rail (1) from the front and rear directions, and the two metal fittings (27 and 28) to be moved toward and away from each other. It is equipped with a screw body (29) that
The base portion (11) includes a joint wall (38) joined to the front wall of the second metal fitting (28), and the joint wall (38) has a thread groove (40) that engages with the screw body (29). is formed,
The first metal fitting (27) and the second metal fitting (28) are temporarily assembled to the rail flange (1c) of the DIN rail (1), and the joint wall (38) of the base part (11) is attached to the second metal fitting (28). The fixing part (10) is fixed to the DIN rail (1) by tightening the screw body (29) in a state where the screw groove (40) engages with the screw body (29). 3. The terminal protection structure according to claim 1, wherein the base part (11) is fixed to the fixing part (10) at the same time. The cover bracket (7) includes a base portion (11), cover support arms (12, 12) integrally formed with the base portion (11), and a fixing portion configured separately from the base portion (11). (10)
The fixing part (10) includes a column (43) fixed to the rail bottom wall (1a) of the DIN rail (1), and a screw body (45) screwed into the column (43),
The base portion (11) includes a joint wall (38) that is joined to the support column (43), and a thread groove (40) that engages with the threaded body (45) is formed in the joint wall (38).
The joint wall (38) of the base (11) is joined to the front end of the column (43), and the threaded body (45) is attached to the column (43) with the thread groove (40) engaged with the threaded body (45). 3. The terminal protection structure according to claim 1, wherein the base part (11) is fixed to the fixing part (10) by screwing into the terminal protection structure.

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