JPS628127Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a terminal block that is used by attaching a terminal block body equipped with electrical components such as a relay and a timer to a guide rail.

Conventional examples are shown in FIGS. 1 and 2. In the figure, 2' is the terminal block main body to which electrical components such as the relay 1 and timer are attached in a plug-in manner, and a groove 23 wide enough to allow the guide rail 29 to pass through is cut on the bottom surface over the entire length. has been done. Two protrusions 24' are protruded from inside the vertical inner surface of the groove 23, and a slit 27 is cut in a direction perpendicular to the groove 23, facing the protrusions 24'. A spacer 25' is provided within 27. A spring device 30 is attached to the tip of the spacer 25' so that it projects into the groove 23 in the normal position.
The terminal block main body 2' is attached to the guide rail 29 as follows. That is, the locking piece 31 on one side of the guide rail 29 is inserted into the protrusion 2 in the groove 23.
4', and the locking piece 32 on the other side of the guide rail 29 is locked to the tip of the spacer 25', thereby attaching the terminal block main body 2' to the guide rail 29.
To remove the terminal block main body 2' from the guide rail 29, pull the spacer 25' against the spring force of the spring device 30 to lock the tip of the spacer 25' with the locking piece 32 of the guide rail 29. Do it by canceling it. In the case of such a conventional example, since the protrusion 24' is located inside the groove 23 of the terminal block body 2', the mold for forming the terminal block body 2' uses a slide core or an undercut. It must be based on the method. If you use the undercut method,
The insulation distance from the guide rail 29 must also be considered. Also, in the spacer 25', the groove 23 is always
If the spring device 30 that moves the spacer 25' by protruding its tip portion inward and then returns the spacer 25' is coil-shaped, there is a problem that the storage space becomes large.

The present invention has been proposed in view of the above-mentioned points, and it simplifies the structure of the molding die when molding the terminal block body, and also allows the terminal block body to be easily molded even when electrical parts such as large relays are attached. To provide a terminal block whose purpose is to prevent the terminal block from easily falling off the guide rail.

Embodiments of the present invention will be described in detail below with reference to the drawings. In the figure, reference numeral 2 denotes a terminal block main body made of an insulating material, and this terminal block main body 2 is used to attach and detach electrical components such as relays and timers in a plug-in manner. A recessed groove 5 is cut in the center of the upper surface of the terminal block main body 2 and is open to both sides, and both sides of the recessed groove 5 are closed. Also, on the upper surface of the terminal block main body 2, centering on the groove 5, both sides thereof, that is, the terminal block main body 2
Four recesses 9 each having an opening on the upper surface are arranged in series on both end sides of the recesses 9 . Insulating partition walls 10 are integrally formed between each recess 9 to provide insulation between each recess 9. In addition, a step 15 is formed in the recess 9 and is raised toward the end.
is perforated. Reference numeral 12 denotes a terminal plate to be installed in each recess 9. A substantially Ω-shaped receiving blade 13 for holding the terminal pin of the relay is formed on one side of the terminal plate 12, and the other side of the terminal plate 12 A connecting piece 14 for connecting to a conductor such as a lead wire to the outside is integrally formed therein. The receiving blade 13 of the terminal plate 12 is inserted into the recess 9, and the connecting piece 14 is placed on the stepped portion 15. An insertion hole 16 is formed in the center of the terminal plate 12, and a screw insertion hole 17 is formed in the connecting piece 14. Screw insertion hole 1 of this terminal plate 12
Reference numeral 7 corresponds to the screw hole 11 of the stepped portion 15 of the terminal block main body 2, and a stopper hole 18 corresponding to the insertion hole 16 of the terminal board 12 is formed in the stepped portion 15. The terminal plate 12 mounted in the recess 9 is inserted into the stepped portion 1 by driving the stud 19 from above through the insertion hole 16 of the terminal plate 2.
5 into the fixing hole 18, and the terminal plate 12 is held and fixed to the terminal block main body 2. A terminal screw 21 is screwed into the screw hole 11 of the terminal block main body 2, and the terminal screw 21 is screwed into the screw hole 11 through the screw insertion hole 17 of the terminal plate 12. Further, 20 is a holding plate that is tightened together with the terminal screw 21, and this holding plate 2
0 and the upper surface of the connecting piece 14 of the terminal board 12 press the conductor of the lead wire. Reference numeral 22 denotes an insulating wall that protrudes upward one step above the end of each partition wall 10;
The insulation of the conductor of the lead wire connected to the terminal board 12 is improved. On the other hand, two protrusions 4 are provided upwardly on the outer side of the groove 5 on the outer side of the upper surface of the terminal block main body 2 where the relay is mounted. The protrusions 4 are formed on both sides of the terminal block body 2, respectively.
An insertion hole 28 is provided on the opposite surface of the base of the square prism-shaped protrusion 4.
are perforated in each case. Reference numeral 3 designates an elastic locking spring, and the locking spring 3 is shaped like a wire rod and bent into a substantially U-shape, with both base ends bent outward to form a locking piece 7. Both locking pieces 7 of the locking spring 3 are inserted into the insertion holes 28 of the protrusion 4 and are rotatably attached. Further, the tip of the stop spring 3 is bent downward into a substantially L shape to form a contact piece 8, and this contact piece 8 abuts the top surface of the relay, etc., and holds the relay to prevent it from coming off. .

On the other hand, a large groove 23 is formed on the lower surface of the terminal block main body 2 over the entire length in the same direction as the longitudinal direction of the groove 5, and the width of this groove 23 is approximately the same as the width dimension of the guide rail 29. It is set as. A protrusion 24 is integrally formed at both ends of the inner surface of one side of the groove 23, and the lower surface of the protrusion 24 forms an inclined surface A in the direction in which the opening width of the groove 23 widens. Further, at the end of the terminal block main body 2 corresponding to the protrusion 24, there is a recess 33 that penetrates vertically and opens on the top surface, bottom surface, and end surface side.
has been deleted. This recess 33 is provided for forming the terminal block main body 2, especially the protrusion 24. Therefore, as shown in FIG. 3, the protrusion dimension W ₁ of the protrusion 24 protruding toward the inside of the groove 23 and the width dimension W ₂ of the recess 33
are the same, or the width dimension W ₂ is slightly larger than the protrusion dimension W ₁ , and the recesses 33 are cut out at both ends of the terminal block main body 2 in correspondence with the projections 24 . A slit 27 is formed in the opposite side of the lower surface of the terminal block main body 2 from the side on which the protrusion 24 is provided, in a direction perpendicular to the direction of the groove 23.
Both sides and bottom surface of 7 are open. Slits 2
A spacer 25 that is movable in the direction of the slit 27 is disposed within the slit 7, and the tip of the spacer 25 protrudes into the groove 23, and its protrusion amount is equal to the opposing protrusion 2.
The protrusion amount is approximately the same as No. 4. The structure for holding this spacer 25 in the slit 27 is constructed as follows. That is, a recess 37 whose lower surface is open in a direction perpendicular to the slit 27 is formed on the lower surface of the terminal block main body 2, and a wire spring 26 is accommodated in the recess 37 as described later. As shown in FIG. 9, protrusions 39 are protruded from the lower ends of the opposing surfaces of the slit 27 and located on both sides of the recess 37, respectively. The spacer 25 is held in the slit 27 with the lower surface of the spacer 25 engaging the upper surface of the convex portion 39. As shown in FIG. 5, the spacer 25 has a groove 34 cut in its lower surface that extends over its entire width, that is, in the same direction as the row direction of the recess 37. The central part of the rod-shaped wire spring 26 is attached, and holding pieces 35 for holding the wire spring 26 are protruded from both ends of the lower surface of the groove 34, respectively. Step portions 40 for engaging the ends of the wire spring 26 are provided at both ends of the recess 37.
are integrally formed as shown in FIG.
FIG. 10 shows the installed state of the wire spring 26. The spacer 25 is inserted into the slit 27 as indicated by the arrow in the figure, and then the wire spring 26 is inserted into the recess 37 and the groove 34 of the spacer 25, respectively. At this time, the wire spring 26 is arranged so that stress is already generated in the attached state. In other words, wire spring 2
The position where the inner surface of the concave groove 34 of the spacer 25 and the center part of the wire spring 26 are in elastic contact is located on the outside of the line connecting the two step parts 40 where the ends of the wire spring 26 are in contact with each other. It is something that exists. Therefore, the wire spring 26 is held in the horizontal direction as described above, and in the vertical direction by the holding piece 35 for preventing clogging and dislodging. At this time, the tip of the spacer 25 protrudes into the groove 23 as shown in FIG. 4, and the base of the spacer 25 protrudes from the outer surface of the terminal block body 2. The spacer 25 is movable in the direction of the slit 27 by the spring force of the wire spring 26. That is, when the spacer 25 is pulled outward,
The tip of the spacer 25 will be retracted out of the groove 23. Further, 36 is a hook hole drilled at the base of the spacer 25 protruding to the outside of the terminal block main body 2.
The tip of a screwdriver is inserted into this hook hole 36 to pull the spacer 25. An inclined surface B corresponding to the inclined surface A of the protrusion 24 is formed on the lower surface of the tip of the spacer 25 . The width W ₃ of the groove 23 on the terminal block body 2 is the width W ₄ of the guide rail 29.
is the same as or larger than .

As shown in FIG. 6, the protrusion 24 of the terminal block body 2 forms a small groove 38 between the upper surface of the protrusion 24 and the lower surface of the groove 23. When the locking piece 31 on one side of the guide rail 29 is inserted and force is applied from the top surface of the terminal block main body 2, the locking piece 3 on the other side of the guide rail 29 is inserted.
2 presses the inclined surface B on the bottom surface of the tip of the spacer 25, so the spacer 25 is twisted by the wire spring 26 from the terminal block body 2.
moves outward against the spring force. Therefore, when the guide rail 29 enters the groove 23 of the terminal block main body 2, the spacer 25 returns with the spring force of the wire spring 26, and the terminal block main body 2 uses this returning force to hold the guide rail 29. do. Also guide rail 2
When removing the terminal block main body 2 from the terminal block 9, hook the tip of a screwdriver into the hook hole 36 of the spacer 25 and move the spacer 25 outward. Then, the terminal block body 2 can be removed from the guide rail 29 by lifting the terminal block body 2 in order to retract the tip of the spacer 5 . Note that the guide rail 29 cannot be inserted into the groove 23 after the locking piece 32 of the guide rail 29 is inserted into the groove on the spacer 6 side.
This is because the protrusion 24 is formed integrally with the terminal block main body 2 and is fixed thereto.

As mentioned above, in this invention, the groove into which the guide rail is inserted is cut across the entire length of the bottom surface of the terminal block body,
A protrusion that locks on one side of the guide rail is integrally provided to protrude inward from the inner surface of the end of the groove of the terminal block body, and the upper and lower surfaces and the end side are open at the end of the terminal block body corresponding to this protrusion. Because it has a recess, when molding the terminal block body, the mold can be molded through the recess when molding the protrusion, making it possible to mold only in the vertical direction, simplifying the mold structure. Moreover, when the terminal block main body is attached to the guide rail, the protrusions are located at both ends of the terminal block main body, so there is less play in the installation, and the lower surface is fixed in the direction perpendicular to the groove. An open slit is cut, and a spacer that locks the other side of the guide rail at its tip that protrudes from inside the slit toward the groove is inserted into the slit via a straight wire spring installed in the same direction as the groove. Since the spacer is moved in the direction of the slit and returned to its original position by the return force of the wire spring, material costs can be reduced by using a wire spring as the spring that provides the spring force for the spacer. , By changing the diameter of the wire spring, any desired spring force can be easily obtained.
Moreover, since the shape of the wire spring is linear, there is no directionality in assembling the wire spring, making it easy to assemble.Furthermore, there is directionality when attaching the terminal block body to the guide rail, and the spacer must be moved. Therefore, there is an advantage that the terminal block main body does not easily come off from the guide rail.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the terminal block body of the conventional example, FIG. Figures 5a and 5b are a bottom view and a side view of the above spacer, respectively.
Figure 6 is an explanatory view of the same as the above, Figure 7 is an exploded perspective view of the same as the above, Figure 8 is a perspective view of the same as the above, Figure 9 is an enlarged perspective view of the main part showing the slit part of the same as the above, and Figure 10 is the same as the above. It is a bottom view of the main parts showing the installation state of the wire spring, 1 is the relay, 2 is the terminal block main body, 23 is the groove, 24 is the protrusion,
25 is a spacer, 26 is a wire spring, 27 is a slit, 29 is a guide rail, and 33 is a recess.

Claims (1)

[Scope of utility model registration request] For terminal blocks in which electrical parts such as relays and timers are installed in a plug-in manner, the terminal block body is removably attached to a guide rail.The groove through which the guide rail is inserted is cut along the entire length of the bottom surface of the terminal block body. A protrusion that locks onto one side of the guide rail is provided integrally protruding inward from the inner surface of the end of the groove of the terminal block body, and a protrusion is provided at the end of the terminal block body corresponding to this protrusion on the upper and lower surfaces and the end surface. A spacer is formed by forming a recess with an open side, cutting a slit with an open bottom in a direction perpendicular to the groove, and locking the other side piece of the guide rail with its tip that protrudes from inside the slit to the groove side. A terminal characterized in that a linear wire spring installed in the same direction as the groove is interposed in the slit, and the spacer is moved in the strip direction of the slit and returned by the return force of the wire spring. The stand.