JP2006179311A - Relay device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relay device capable of carrying out attachment and detachment of a relay main body simply and with small force to and from a connection table. <P>SOLUTION: The relay main body A is provided with a hooking protrusion 5 protruded from a part between a top face and terminals 2 to 4 on a rear face of a unit 1 with the plug-in terminals 2 to 4 protruded. The hooking protrusion 5 comes in a hooking contact with a protrusion rest face fitted to the connection table at the time of attachment and detachment of the relay main body A to and from the connection table. By rotating the unit 1 to an insertion/removal direction of the terminals 2 to 4 with a contact site of the hooking protrusion 5 with the protrusion rest face as a fulcrum, with the hooking protrusion 5 kept in contact with the protrusion rest face, the relay main body A is attached and detached to and from the connection table. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a relay device in which a relay body having a plug-in type terminal is detachably attached to a connection base to which a terminal of the relay body is inserted and connected.

  Conventionally, as this type of relay device, as shown in FIG. 13, a relay body is provided between a relay body A in which a terminal 2 protrudes from the lower surface of the container 1 and a pair of coupling arms 43 and 44 that protrude upward. Some of them are configured with a connection base B to be held.

  A guide groove 46 for introducing a coupling protrusion 45 projecting from the side surface of the body 1 of the relay main body A is formed on a surface of the coupling arm 43 on one side (right side in the drawing) facing the coupling arm 44, The lower end of the bottom surface of the groove 46 is continuous with the coupling hole 47 engaged with the coupling protrusion 45. An introduction groove 48 whose bottom surface is inclined so as to approach the coupling arm 43 downward from the tip edge of the coupling arm 44 is formed on a surface of the other coupling arm 44 facing the coupling arm 43. Is provided with a coupling hole 47 that engages with a coupling protrusion 45 projecting from the side surface of the body 1 of the relay body A. Further, the lower surfaces of both coupling protrusions 45 of the relay main body A are inclined in a direction away from the side surface of the vessel body 1.

This relay device is arranged along the protruding direction of the terminal 2 with one coupling protrusion 45 of the relay body A aligned with the position of the guide groove 46 and the other coupling protrusion 45 aligned with the position of the introduction groove 48. By pushing the body 1 straight down, the terminal 2 is inserted and connected to the connection base B, and the body 1 is inserted and held between the pair of coupling arms 43 and 44. Here, each coupling protrusion 45 of the relay main body A engages with the coupling hole 47, so that the relay main body A is prevented from coming off (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 7-45348 (2nd page, FIG. 2)

  However, in the above-described configuration, in order to align the relay main body A with respect to the connection base B, it is necessary to align the guide body 46 and the introduction groove 48, so the relay main body to the connection base B is required. Installation of A is troublesome. In addition, since a relatively large force may be required to insert and remove the terminal 2 with respect to the connection base B, it is also desired to reduce the force required to attach and detach the relay body A to the connection base B. In particular, when the relay body A has a plurality of terminals 2, a large force is required to attach and detach the relay body A to the connection base B. Further, in the above-described relay device, the relay body A is mounted on the connection base B by switching the left and right of FIG. There is a possibility that.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a relay device that can attach and detach a relay body to and from a connection base more easily and with less force than a conventional configuration.

  According to the first aspect of the present invention, a relay body in which a plug-in type terminal protrudes from one surface of the device body, and a connection in which the terminal of the relay body is inserted and connected in a state where the relay body is detachably attached and the relay body is attached. The relay body protrudes from between the other surface of the container adjacent to the one surface and the terminal on the one surface from which the terminal in the container protrudes, and when the terminal is inserted into and removed from the connection table, The contact portion with the projection receiving surface has a hooking projection that serves as a fulcrum for rotation of the body by contacting the projection receiving surface provided on the projection.

  According to this structure, the relay projection is first brought into contact with the projection receiving surface, and then the body is rotated in the insertion direction of the terminal with the contact portion with the projection receiving surface of the hooking projection as a fulcrum. Can be attached. That is, since the relay main body can be aligned with the connection base simply by bringing the hooking protrusion into contact with the protrusion receiving surface, the attachment of the relay main body to the connection base becomes simpler than in the conventional configuration. In addition, if the terminal is inserted into the connection base by rotating the container by pressing a part of the container that is farther from the fulcrum than the terminal as a force point, the terminal serving as the action point is added to the force point by the lever principle. It will be inserted into the connection base with a force greater than the applied force. That is, the terminal can be inserted into the connection base with a relatively small force. When removing the relay body from the connection base, it is only necessary to rotate the body in the direction opposite to that at the time of installation.In this case as well, the lever is used to remove the terminal from the connection base with a relatively small force. Can be removed. In addition, since the hooking protrusion used as the fulcrum of rotation is provided in one place, it does not attach a relay main body reversely with respect to a connection stand.

  According to a second aspect of the present invention, in the first aspect of the present invention, there are a plurality of the terminals of the relay main body arranged in a line, and the hooking protrusion is arranged in a straight line with the terminal in the container. It is characterized by.

  According to this configuration, when the relay body is attached to the connection base, a plurality of terminals are inserted into the connection base one by one in order from the hooking projection side, so when all the terminals are simultaneously inserted into the connection base. The relay body can be attached to the connection base with less force. Also, when removing the relay body from the connection base, multiple terminals are removed from the connection base one by one in order from the opposite side of the hooking projection, so when all terminals are removed from the connection base at the same time It is possible to remove the relay body from the connection base with a small force compared to the above.

  The invention according to claim 3 is the invention according to claim 1 or claim 2, wherein there are a plurality of types of the relay main body and the connection base, and the combination is determined, and the combination of the relay main body and the connection base is correct. A pair of misconfiguration prevention concavo-convex portions in which the arrangement of the concave portion and the convex portion is different for each combination of the relay main body and the connection base so as to fit only on the one surface and the connection base that are abutted against the connection base in the vessel body It is provided in each of the one surface faced by the container.

  According to this configuration, it is possible to prevent the relay body from being erroneously attached to another type of connection base.

  According to a fourth aspect of the present invention, in the invention of the third aspect, the assembly error preventing uneven portion on the body side is formed in a portion that can be visually recognized in a state where the relay body is attached to the connection base. Features.

  According to this configuration, the combination error prevention uneven portion can always be visually recognized, so that it is possible to visually notify the mismatch of the types of the relay body and the connection base.

  The invention of claim 5 is characterized in that, in the invention of claim 3 or claim 4, the assembly error preventing uneven portion on the side of the body is provided around the hooking projection.

  According to this configuration, when the relay body is attached to the connection base, the uneven assembly prevention uneven part is provided at the part of the relay body that first contacts the connection base, so that if a misconfiguration occurs, the installation work can be done early. Can be interrupted, and the working time extended due to a mistake in assembly can be kept relatively short.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects of the present invention, the connection base is between the hooking piece on one surface where the connection body is abutted against the container body with the relay body attached. A holding piece is provided at a position between which the terminal is sandwiched, and an engaging protruding piece projects from one of the holding piece and a portion of the container that contacts the holding piece, and the other engages with the engaging protruding piece. A mating engagement hole is formed.

  According to this configuration, when the relay main body is attached to the connection base, the engaging protrusion engages with the engagement hole. Therefore, when the relay main body is attached to the connection base, the relay main body is attached to the connection base side. It is possible to easily determine how much to push in and to prevent the relay body from being detached from the connection base.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the relay body indicates an arrow indicating a rotation direction of the container when attached to the connection base, and from the connection base. It has the construction display part which described the arrow which shows the rotation direction of the container at the time of removing in the site | parts other than the one surface abutted by the connection stand in a container.

  According to this configuration, since the method of attaching / detaching the relay main body to / from the connection base is shown to the worker, improvement in the efficiency of the attaching / detaching work can be expected. Further, since the relay body can be prevented from being attached and detached by an incorrect method, the relay body and the connection base can be prevented from being damaged.

  According to an eighth aspect of the present invention, there is provided a pair of mounting claws that elastically hold the relay body and the connection base coupled to each other from both sides in the insertion direction of the terminal. In order to make it possible to attach to the connecting mounting plate having the mounting holes, mounting holes for engaging the mounting claws of the connecting mounting plate are provided in each of the relay main body and the connecting base. Using a jig inserted into the mounting hole, the mounting claws engaged with the mounting holes of the relay body are elastically removed from the mounting holes by removing them from the mounting holes against elasticity. A guide groove for guiding the jig used for removing the mounting claw from the mounting hole into the mounting hole is provided on the inner peripheral surface of the mounting hole.

  According to this configuration, it is easy to insert a jig for removing the relay main body and the connection base from the connection mounting plate into the attachment hole of the relay main body, so that the work of removing the relay main body and the connection base from the connection mounting plate is facilitated. It leads to an effect.

  A ninth aspect of the present invention is the connection terminal according to any one of the first to eighth aspects, wherein the relay main body is connected to a contact point and exposed from a portion other than one surface that is abutted against the connection base in the body. And a terminal cover that covers the connection terminal by being attached to the container, and the container has a plurality of types of cover positioning portions for positioning a plurality of types of terminal covers having different shapes for each type.

  According to this configuration, since the container can position not only one type of terminal cover but also a plurality of types of terminal covers having different shapes, only the terminal cover can be replaced according to the purpose of use.

  The invention of claim 10 is the invention according to any one of claims 1 to 9, wherein the relay body is provided with a manual lever operated to manually open and close the contact, and the manual lever is provided in the container body. It is exposed in an operation recess formed in one surface other than the one surface that is abutted against the connection base, and the operation recess has one side of the manual lever opened.

  According to this configuration, since one side of the manual lever is opened, there is an advantage that the manual lever can be easily operated.

  The invention according to claim 11 is the invention according to any one of claims 1 to 9, wherein the relay body includes a manual lever operated to manually open and close the contact, and the manual lever is provided in the container body. It is exposed in an operation recess that is recessed in one surface other than the one surface that is abutted against the connection base, and the operation recess is open on both sides of the manual lever.

  According to this configuration, since both sides of the manual lever are open, there is an advantage that the manual lever is easy to operate. Moreover, since it can visually recognize that it has an operation recess even if it sees a body from either the both sides of a manual lever, identification with the other relay main body which does not have an operation recess becomes easy.

  A twelfth aspect of the present invention is the readable nameplate according to the tenth or eleventh aspect, wherein the relay main body is attached to the body along one surface of the body where the operation recess is provided. The nameplate is extended so that a part is attached along the inner peripheral surface of the operation recess.

  According to this configuration, since the nameplate is extended to the inside of the operation recess, a writable area in the container is ensured to be relatively wide, and a relatively large amount of information can be written.

  The present invention attaches the relay body to the connection base by first contacting the hooking protrusion with the protrusion receiving surface and then rotating the body in the terminal insertion direction with the contact portion of the hooking protrusion contacting the protrusion receiving surface as a fulcrum. It is something that can be done. That is, since the relay main body can be aligned with the connection base simply by bringing the hooking protrusion into contact with the protrusion receiving surface, the attachment of the relay main body to the connection base becomes simpler than in the conventional configuration. Also, if the terminal is inserted into the connection base by rotating the container by pressing the part farther from the fulcrum than the terminal in the container as a force point, the terminal that is the point of action is actually the force point by the lever principle. It is inserted into the connection base with a force larger than the applied force. That is, there is an advantage that the terminal can be inserted into the connection base with a relatively small force. When removing the relay body from the connection base, it is only necessary to rotate the body in the direction opposite to that at the time of installation.In this case as well, the lever is used to remove the terminal from the connection base with a relatively small force. Can be removed. In addition, since the hooking protrusion used as the fulcrum of rotation is provided in one place, it does not attach a relay main body reversely with respect to a connection stand.

  As shown in FIG. 2, the relay device according to the present embodiment controls the on / off of power supply to a load (not shown) by opening and closing a contact (not shown) accommodated in the container 1. A and a connection base B that is electrically connected to the relay body A in a state where the relay body A is attached. In the following description, the top and bottom of FIG.

  As shown in FIG. 1, the relay main body A includes a container body 1 formed in a thin box shape having the smallest horizontal dimension. From the back surface of the container 1, plug-in terminals 2 to 4 inserted and connected to the connection base B protrude rearward. The terminals 2 to 4 protrude in a row in a plurality of rows (here, 5) in the vertical direction, and are arranged to be biased to the upper left on the back surface of the container 1. Each of the terminals 2 to 4 is formed in a plate shape that is long in the front-rear direction and thin in the left-right direction. The relay body A includes a coil terminal for energizing an internal coil (not shown), and an auxiliary terminal connected to an auxiliary contact (not shown) linked to the contact and used to detect opening and closing of the contact. In this embodiment, of the terminals 2 to 4 protruding from the back surface of the container 1, the lower two terminals 2 are coil terminals, and the upper three terminals 3 and 4 are auxiliary. Terminal. The two lower terminals 4 of the auxiliary terminals are connected to each other in the container 1 and also function as detection terminals described later. The container body 1 includes a cylindrical portion 10 having a rectangular cross section along the back surface that is erected around the terminals 2 to 4 so as to surround the terminals 2 to 4.

  Moreover, the relay main body A is provided with the connection terminal 25 (refer FIG. 5) connected to the contact separately from the terminals 2-4 inserted and connected to the connection base B mentioned above. The connection terminal 25 is exposed across the line. The connection terminal 25 is a screwed terminal to which a load (not shown) and a power source (not shown) are connected, and includes a terminal plate 26 and a terminal screw 27 screwed to the terminal plate 26. In the present embodiment, four sets of two connection terminals 25 are provided, and a configuration is adopted in which two sets of contacts are provided and a pair of connection terminals 25 is connected to each set of contacts. Alternatively, two sets of connection terminals 25 may be connected in parallel. Here, an insulating wall 28 (see FIG. 5) for insulation is disposed between the pair of connection terminals 25, and each pair of connection terminals 25 is disposed in a stepwise manner in the vertical direction.

  By the way, the relay main body A of this embodiment can also open and close a contact manually. The manual contact opening and closing is performed by operating a manual lever 19 provided at the left end of the upper surface of the container 1. The manual lever 19 is disposed in an operation recess 20 that is recessed downward on the upper surface of the vessel 1. The operation recess 20 is formed by a rear inclined surface 21 that is inclined so as to be recessed downward toward the front, and a front inclined surface 22 that is inclined so as to be recessed downward toward the rear. The manual lever 19 is exposed from the operation window 23 opened in the rear inclined surface 21 and is operated in the front-rear direction along the rear inclined surface 21. Here, one of the operation recesses 20 in the left-right direction (here, left) is opened so that the manual lever 19 can be easily operated.

  On the other hand, as shown in FIG. 2, the connection base B is provided with a mounting recess 11 that is recessed rearward in the same shape as the back surface of the container 1. The relay body A is attached to the connection base B in a state where the rear end portion is inserted into the attachment recess 11. A plurality (four in this case) of mounting recesses 11 are juxtaposed in the left-right direction on the connection base B shown in FIG. 2, and a plurality (here, a maximum of four) of relay bodies A can be attached. is there. Here, the connection base B includes a detection circuit (not shown) in which the two terminals 4 as the detection terminals described above are connected between the pair of detection ends in a state where the relay main body A is attached, Whether the relay main body A is attached to each of the attachment recesses 11 is determined by monitoring the open / short circuit between the detection ends by a circuit.

  Next, a structure for attaching the relay main body A to the connection base B will be described.

  As shown in FIG. 1, the relay main body A is provided with a hooking protrusion 5 that protrudes upward from the upper surface of the outer peripheral surface of the cylindrical portion 10. The hook projection 5 protrudes from the rear end portion of the cylinder portion 10 along the back surface of the container body 1 across the left and right ends of the tube portion 10, and has a gap between the back surface of the container body 1. As shown in FIG. 3, the front end surface of the hooking protrusion 5 is inclined so that the protrusion dimension of the hooking protrusion 5 becomes smaller toward the back side of the container body 1.

  Further, an upper step 7 is formed on the upper surface of the container body 1 so that the rear end portion is retreated downward as an upper contact surface 6 described later. A lower step 9 is formed as the contact surface 8 that is retreated upward. Here, the lower contact surface 8 is formed longer in the front-rear direction than the upper contact surface 6, and is extended in the left-right direction at the center of the lower contact surface 8 as shown in FIG. A protruding piece (engaging protruding piece) 17 is provided in a protruding manner. The protruding piece 17 is formed in a shape in which a cross section perpendicular to the left-right direction is a part of an arc.

  On the other hand, as shown in FIG. 3, the connection base B includes an engagement protrusion 12 that protrudes downward from the inner peripheral surface of the attachment recess 11 at the upper end portion of the attachment recess 11. The engagement protrusion 12 is set to a protrusion dimension in which the tip end portion fits in the gap between the back surface of the container body 1 and the hook protrusion 5 in a state where the relay main body A is attached to the connection base B. Further, the connection base B has a lower peripheral edge on the lower side of the mounting recess 11 so as to come into contact with the lower contact surface 8 of the body 1 with the rear end portion of the relay body A inserted in the mounting recess 11. The holding piece 13 (refer FIG. 2) protruded ahead from. The holding piece 13 is provided with an engaging hole 18 through which the protruding piece (engaging protruding piece) 17 of the container body 1 is engaged. The engagement hole 18 is disposed at a position where the protrusion 17 fits in a state where the relay main body A is securely attached to the connection base B.

  Below, the process of attaching the relay main body A to the connection base B will be described with reference to FIGS.

  First, in the relay main body A, the corner between the back surface and the top surface of the device body 1 is inserted into the mounting recess 11 with the back surface of the device body 1 facing the connection base B. That is, a part of the relay main body A is inserted into the mounting recess 11 in a state of being inclined with respect to the connection base B as shown in FIG. At this time, as shown in FIG. 3, the upper end of the back surface of the container body 1 contacts the front surface of the meshing protrusion 12. Further, the tip end of the meshing protrusion 12 fits in the gap between the back surface of the container 1 and the hooking protrusion 5. Next, the entire back surface of the container 1 is inserted into the mounting recess 11. At this time, the back surface of the engaging protrusion 12 functions as a protrusion receiving surface for hooking the hooking protrusion 5, and the container 1 has a contact portion with the engaging protrusion 12 in the hooking protrusion 5 by the hooking protrusion 5 being hooked on the engaging protrusion 12. As a fulcrum, it rotates clockwise in FIG. Here, the corner between the back surface of the container 1 and the lower contact surface 8 moves on the holding piece 13 of the connection base B and is introduced into the mounting recess 11. When the ridge piece 17 fits into the engagement hole 18, the attachment of the relay body A to the connection base B is completed.

  In this state, the upper step 7 contacts the front end edge of the upper end portion of the connection base B, and the lower step 9 contacts the front end edge of the holding piece 13. Furthermore, the upper contact surface 6 contacts the inner peripheral surface of the mounting recess 11 and the lower contact surface 8 contacts the inner peripheral surface of the mounting recess 11 and the upper surface of the holding piece 13, thereby The rear end portion of 1 is held in the mounting recess 11. In this state, the terminals 2 to 4 are inserted and connected to the connection base B.

  In this embodiment, as described above, the hooking protrusion 5 is hooked on the meshing protrusion 12 and the device body 1 of the relay main body A is rotated so that the relay main body A and the connection base B are coupled. The relay body A and the connection base B can be easily aligned simply by hooking 5 on the meshing protrusion 12. Further, by pressing a portion (for example, the front end portion of the upper surface of the body 1) that is relatively far from the contact portion with the meshing projection 12 in the hooking projection 5 serving as a fulcrum, it becomes an action point by the lever principle. The terminals 2 to 4 can be inserted into the connection base B with a relatively small force. In addition, in this configuration, the plurality of terminals 2 to 4 arranged in a line in the vertical direction are not inserted into the connection base B all at once, but are inserted into the connection base B one by one in order from the hooking projection 5 side, that is, from the upper side. Therefore, there is also an advantage that the attachment can be performed with a small force as compared with the case where all of the terminals 2 to 4 are simultaneously inserted into the connection base B.

  Further, since the fitting is completed by fitting the protrusion 17 into the engagement hole 18, it becomes easy to know how far the relay body A should be pushed into the mounting recess 11, and the relay body A is connected. It can prevent coming off from the base B. Here, since the protrusion 17 is formed in a shape whose cross section is a part of an arc, it is not caught by the lower end of the connection base B when the relay main body A is attached, and is engaged when the relay main body A is removed. It does not get caught on the periphery of the hole 18. That is, the protrusion 17 does not prevent the relay body A from being attached to or detached from the connection base B.

  As shown in FIG. 5, the relay device in which the relay main body A and the connection base B are combined can be attached to a connection mounting plate C having a main plate 38 arranged along the lower surfaces of the relay main body A and the connection base B. is there. As shown in FIG. 6, the connection mounting plate C includes a pair of mounting claws 39 and 40 that hold the lower ends of the relay body A and the connection base B coupled to each other from both sides in the insertion direction of the terminals 2 to 4. Have. In the present embodiment, as described above, a maximum of four relay main bodies A can be simultaneously arranged on the connection base B, so that four sets of attachment claws 39 and 40 are provided. As shown in FIG. 7A, each of the connection base B and the relay main body A has an attachment hole 41 (not shown on the connection base B side) in which the attachment claws 39, 40 of the connection attachment plate C are engaged. ) Is provided.

  The attachment claw 39 that engages with the attachment hole of the connection base B is formed by cutting and raising a part of the main plate 38, and the attachment claw 40 that engages with the attachment hole 41 of the relay main body A is attached to a part of the main plate 38. Made of a spring member. The mounting claw 40 that engages with the mounting hole 41 of the relay main body A has flexibility in a direction that widens the gap with the other mounting claw 39, and the mounting claw 39 engages with the mounting hole of the connection base B. If the relay main body A is pressed to the main plate 38 side in this state, the mounting claws 40 engage with the mounting holes 41 of the relay main body A, and the mounting of the relay device to the connecting mounting plate C is completed.

  On the other hand, when removing the relay device from the connection mounting plate C, a jig (not shown) such as a flat-blade screwdriver is inserted into the mounting hole 41 of the relay main body A, and the mounting claw 40 is elastically resisted from the mounting hole 41. It is necessary to remove. Here, on the inner peripheral surface of the mounting hole 41 of the relay body A, the tip of the minus driver is placed in the mounting hole 41 so that a jig for removing the mounting claws 40 can be easily inserted from the mounting hole 41 of the relay body A. As shown in FIG. 7 (b), the guide groove 42 that guides to the top is recessed upward with a width that can accommodate the tip of the flathead screwdriver.

  However, in a state where a plurality of relay main bodies A are attached to the connection base B as shown in FIG. 5, the relay main bodies A are removed from the connection mounting plate C one by one. In other words, simply removing the mounting claw 40 from the mounting hole 41 of one relay body A keeps the other relay body A and the connection base B on the connection mounting plate C. It is necessary to remove the relay main body A from the attached connection base B. When removing the relay main body A from the connection base B, the process of attaching the relay main body A to the connection base B is performed in reverse. That is, for example, by pulling the front end portion of the container body 1 away from the connection mounting plate C, the container body 1 is rotated counterclockwise in FIG. As a result, the relay body A can be removed from the connection base B. Thus, also when removing the relay main body A from the connection base B, there exists an advantage that the terminals 2-4 can be extracted from the connection base B with a comparatively small force using a lever principle.

  In addition, the relay main body A of the present embodiment is attached to and detached from the connection base B by rotating the device body 1 as described above, and the connection base B even if the device body 1 is translated backward. And cannot be removed from the connection base B even if the container body 1 is translated forward. Therefore, for example, as shown in FIG. 2, an arrow indicating the rotation direction of the container body 1 when the relay body A is attached is denoted as “attachment direction”, and the rotation direction of the container body 1 when the relay body A is removed is indicated. It is desirable that the construction display unit 14 in which the indicated arrow is indicated as “removal direction” is provided on the right side surface of the container 1, for example, so that the builder can easily understand how to attach and detach the relay main body A. In the state where the relay body A is attached to the connection base B, the coupling structure such as the hook projection 5 is not exposed, and it may be difficult to understand how to attach and detach the relay body A. Thus, it is possible to prevent the relay main body A from being attached or detached by an incorrect method, which not only improves the efficiency of the attaching / detaching work but also prevents the relay main body A and the connection base B from being damaged.

  Furthermore, in this embodiment, as shown in FIG. 2, at the right end portion at the corner portion between the back surface and the upper surface of the container body 1, the concave portion and the convex portion are arranged side by side in the left-right direction. An assembly error prevention uneven portion 15 is formed. On the other hand, on the connection base B, the second assembly error prevention unevenness in which the first assembly error prevention uneven portion 15 is fitted in the portion corresponding to the first assembly error prevention uneven portion 15 in a state where the relay main body A is attached. A portion 16 is provided. Thus, for example, when the system is developed in another system, the shapes of the first and second combination error prevention uneven portions 15 and 16 are set for each system, so that another system is provided for the connection base B of the present embodiment. Even if the relay body A ′ is attached, the first assembly error prevention uneven portion 15 ′ does not fit into the second assembly error prevention uneven portion 16 as shown in FIG. Intrusion into the mounting recess 11 at the corner between the upper surface is prohibited, and erroneous insertion between systems is prevented. In addition, since the first and second combination error preventing irregularities 15 and 16 are provided at sites that are always visible even when the relay main body A is attached to the connection base B, the installer can It is possible to know whether or not there is an erroneous insertion by visually recognizing the assembly error prevention uneven portions 15 and 16.

  As shown in FIG. 9, a name plate 24 on which a user can write a relay number or the like is attached to the upper surface of the container 1. The nameplate 24 is extended so that a part of the nameplate 24 can be attached along the inner peripheral surface of the operation recess 20 in order to ensure a relatively large writable area within a range that does not hinder the operation of the manual lever 19. Desirably, in FIG. 9, the extended portion is attached to the front inclined surface 22.

  By the way, as shown in FIG. 9, the terminal cover 29 which covers the connection terminal 25 is attached to the site | part in which the connection terminal 25 was provided in the container 1, but in this embodiment, as shown in FIG. A plate-shaped main piece 30 along the upper surface of the body 1 and a drooping piece 31 extending downward from the front end edge of the main piece 30, and a screw through hole for exposing the terminal screw 27 of the connection terminal 25 to the main piece 30 32 is provided, and a terminal cover 29 provided with a wire through-hole 33 through which a wire (not shown) can be inserted into the hanging piece 31 can be attached. A pair of mounting projections 34 projecting in the left-right direction are provided on the left and right side edges of the main piece 30 of the terminal cover 29. As a cover positioning portion for positioning the terminal cover 29 in a state where the terminal cover 29 is attached to the container body 1, as shown in FIG. 10, the opposing surfaces of the side walls in the left-right direction of the container body 1 and the insulating wall 28. A cover groove 35 that extends in the front-rear direction and opens forward is formed. The terminal cover 29 is positioned between each side wall in the left-right direction of the container 1 and the insulating wall 28 by inserting the attachment protrusion 34 into the cover groove 35 from the front. With the terminal cover 29 attached, the terminal screw 27 of the connection terminal 25 can be turned through the screw through hole 32. On the other hand, when it is not necessary to expose the terminal screw 27, a terminal cover 29 'different from those shown in FIGS. 9 and 10 can be attached. As shown in FIG. 11, the terminal cover 29 ′ has a plate shape along the upper surface of the container body 1, and is provided at the upper end portion of the facing surface between the side walls in the left-right direction of the container body 1 and the insulating wall 28. The left and right side walls of the container 1 and the insulating wall 28 by the cover attaching recess 36 (see FIG. 10) and the cover attaching projection 37 (see FIG. 10) provided in front of the cover attaching recess 36. Positioned between each of them. That is, the cover attachment recess 36 and the cover attachment protrusion 37 function as a cover positioning portion for positioning the terminal cover 29 '.

  In addition, as shown in FIG. 12, the operation recess 20 may be formed across the left and right ends of the body 1 so that the operation recess 20 is opened in both the left and right directions. It is easier to operate the manual lever 19 than when the operation recess 20 is opened in one of the left and right directions, and it is possible to visually recognize that the operation recess 20 has the operation recess 20 when viewed from either the left or right direction. Identification with other relay bodies without the recess 20 is facilitated.

  Note that the relay device can be fixed to the panel by attaching the connection mounting plate C to which the relay device is mounted, for example, to a panel (not shown) such as a control panel. The relay device is arranged with the upper left side in FIG. 5 as the upper side and the lower right side as the lower side so that the front surface of the relay body A where the manual lever 19 is exposed is the front surface while being fixed to the board.

It is a perspective view which shows the relay main body of embodiment of this invention. It is a perspective view which shows the process of attachment same as the above. It is sectional drawing of the principal part which shows the process of attachment same as the above. It is a perspective view which shows a structure same as the above. It is a perspective view which shows a structure same as the above. It is a perspective view which shows the connection attachment board used for the same as the above. The structure of a relay main body same as the above is shown, (a) is a perspective view, (b) is a perspective view of the principal part. It is a perspective view of the principal part which shows a structure same as the above. It is a perspective view which shows a relay main body same as the above. It is a perspective view which shows a relay main body same as the above. It is a perspective view which shows the other structure of a relay main body same as the above. It is a perspective view which shows the other structure of a relay main body same as the above. It is sectional drawing of the principal part which shows a prior art example.

Explanation of symbols

1 Container 2-4 Terminal 5 Hooking projection 12 Engagement projection (projection receiving surface)
Reference Signs List 13 Holding piece 14 Construction display portion 15, 16 Assembly error prevention uneven portion 17 Projection piece (engagement projection piece)
18 engagement hole 19 manual lever 20 operation recess 24 name plate 25 connection terminal 29, 29 'terminal cover 35 groove for cover (cover positioning part)
36 Cover mounting recess (cover positioning part)
37 Cover mounting protrusion (cover positioning part)
39, 40 Mounting claw 41 Mounting hole 42 Guide groove A Relay body B Connection base C Connection mounting plate

Claims (12)

  A relay body having a plug-type terminal projecting from one side of the body, and a connection base to which the relay body terminal is inserted and connected in a state where the relay body is detachably attached and the relay body is attached, Is a protrusion receiving surface provided on the connection base when the terminal protrudes from the other surface of the container adjacent to the one surface and the terminal on the one surface from which the terminal of the container protrudes, and when the terminal is inserted into and removed from the connection base. A relay device having a hooking protrusion whose contact portion with the protrusion receiving surface serves as a fulcrum of rotation of the vessel body by contacting the hook so as to be hooked on the device.   2. The relay device according to claim 1, wherein a plurality of the terminals of the relay main body are arranged in a line, and the hooking protrusions are arranged in a straight line with the terminals in the container. .   There are a plurality of types of the relay body and the connection base, and combinations are determined, and a recess is provided for each combination of the relay body and the connection base so that the relay body and the connection base are fitted only when the combination is correct. A pair of misconfiguration prevention concavo-convex portions having different arrangements of protrusions and protrusions are provided on each of the one surface abutted against the connection base in the container and the one surface abutted against the container on the connection base. The relay device according to claim 1 or 2.   4. The relay device according to claim 3, wherein the assembly error prevention uneven portion on the side of the container is formed at a site that is visible when the relay body is attached to the connection base.   5. The relay device according to claim 3, wherein the assembly error prevention uneven portion on the container side is provided around the hooking protrusion. 6.   The connection base has a holding piece at a position where the terminal is sandwiched between the hooking piece on one surface that is abutted against the container body with the relay body attached, and the holding piece and the container body The engagement projection piece protrudes from one side of the portion that contacts the holding piece, and the engagement hole that engages with the engagement projection piece is formed on the other side. The relay device according to any one of 5.   The relay main body represents an arrow indicating the rotation direction of the container when attached to the connection base, and a construction display portion indicating an arrow indicating the rotation direction of the container when removed from the connection base in the body The relay device according to any one of claims 1 to 6, wherein the relay device is provided in a portion other than one surface that is abutted against the connection base.   In order to enable attachment to the connection mounting plate having a pair of mounting claws that elastically hold the relay body and the connection base coupled to each other from both sides in the terminal insertion direction, Engaging mounting holes are provided in each of the relay main body and the connection base, and the relay main body and the connection base are engaged with the mounting holes in the relay main body using a jig inserted into the mounting holes in the relay main body. The relay main body guides the jig used to remove the mounting claw from the mounting hole into the mounting hole. The relay device according to any one of claims 1 to 7, wherein a guide groove is provided on an inner peripheral surface of the mounting hole.   The relay body includes a connection terminal that is connected to a contact point and is exposed from a portion other than one surface that is abutted against the connection base in the body, and a terminal cover that covers the connection terminal by being attached to the body. 9. The relay device according to claim 1, wherein the relay device has a plurality of types of cover positioning portions for positioning a plurality of types of terminal covers having different shapes for each type.   The relay body includes a manual lever that is operated so as to manually open and close the contact, and the manual lever is exposed in an operation recess that is recessed on one surface other than the one surface that abuts the connection base in the body. The relay device according to claim 1, wherein one side of the manual lever is opened in the operation recess.   The relay body includes a manual lever that is operated so as to manually open and close the contact, and the manual lever is exposed in an operation recess that is recessed on one surface other than the one surface that abuts the connection base in the body. The relay device according to any one of claims 1 to 9, wherein the operation recess is open on both sides of the manual lever.   The relay body includes a writable nameplate attached to the body along one surface of the body in which the operation recess is provided, and the nameplate is partially along the inner peripheral surface of the operation recess. The relay device according to claim 10, wherein the relay device is extended so as to be attached.

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