JP2770214B2 - Terminal block with terminal screw upper stop mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block in which a terminal screw can be stopped above a terminal block to connect a crimp terminal and prevent the terminal screw from dropping off from the terminal block during operation. It is about.

[0002]

2. Description of the Related Art Conventionally, a round crimp terminal having a terminal screw through hole formed in the center for connection to an external electric wire in a terminal block has been often used. In many cases, terminal screws were detached from the terminal block and mounted. This work is troublesome, and the terminal screws may be lost. Stop the terminal screws in the air above the terminal screw mounting surface of the terminal block, attach the crimp terminals, and simultaneously drop from the terminal block. Terminal blocks capable of preventing this have been developed.

It is a terminal block disclosed in Japanese Patent Publication No. Hei 4-25678. In order to stop the terminal screw in the air above the terminal block, the terminal block engages a locking piece of a movable member attached to the terminal screw with a guide formed on the terminal block to prevent the terminal screw from falling off. This was due to the guide formed on the platform block.

[0004]

SUMMARY OF THE INVENTION
As for the terminal block according to No. 78, in which a guide is formed on the terminal block, a terminal screw and a member for stopping the terminal block must be mounted from below the terminal block,
The terminal block structure has to be changed from the conventional one, and has a drawback that it is weak against pressure from above. Further, there is a problem that the vertical stop of the upper stop fitting (referred to as a movable member in the above-mentioned publication) and, consequently, the terminal screw is not smooth and practical. The present invention has been developed in order to solve the above-mentioned problems, by separately providing a member to which the upper stop fitting is engaged, to ensure smooth operability and versatility of the terminal block.

[0005]

SUMMARY OF THE INVENTION The present invention is configured as follows to solve the above problems. First, a flat plate portion having a terminal screw attached to an upper stop fitting and three legs formed downward from one side thereof are provided, and a locking piece is formed with the two outer legs facing outward. With the locking legs
The center leg is a stop leg bent in a substantially U-shape so that the bent portion facing rearward in the attached state projects rearward from between the locking legs.

Second, a fall-prevention frame, a fixing piece, a position adjusting recess, and an embedded leg are formed in the guide fitting. Thirdly, the fall-prevention frame is placed on the upper part of the flat back plate, and the length of both sleeves is set to a width slightly smaller than the interval between the locking pieces of the upper stop fitting. Fourth, the fixing piece is provided with both sleeve portions in the middle of the flat back plate of the guide fitting, and the two locking portions are arranged so that the interval between the both sleeve portions is the maximum width of the upper stop fitting. Bent forward in a substantially U-shape so that it is wider than the width of
A notch is formed at the upper part of the both sleeves, and this part is formed so as to be opened so as to abut against the partition wall on the outside. Fifthly, the back plate against which the bent portion of the stop leg of the upper stop fitting presses the position adjusting recess. A cutout is formed near the center of the cutout, leaving only one lower side, and the cutout is formed by slightly bending the cutout rearward. Sixth, the cutout has a width corresponding to the width of the bent portion of the stop leg which is notched vertically in the embedded leg. A corresponding guide cavity was formed. Furthermore, the locking piece of the upper stop fitting is slidably mounted so as to be positioned below the fall-prevention frame of the guide fitting, and the cutout piece of the position adjusting recess fits the guide fitting with the upper stop fitting. The terminal block was buried from above at the rear of the terminal screw mounting position of the terminal block in which the fixing recess was formed.

[0007]

Embodiments of the present invention will be described below. FIG.
1 is an exploded perspective view of a main part of a terminal block having a terminal screw upward stop mechanism according to an embodiment of the present invention. FIG. 2 is a cross-sectional view in a state where the terminal screw is stopped upward, and FIG. It is sectional drawing of the state in which the terminal screw was tightened. In the figure, 1 is a terminal block, 2 is an upper stop fitting, and 3 is a guide fitting.

The upper stopper 2 is made of a material having elasticity such as a leaf spring. As shown in a front view of FIG. 4 and a right side view of FIG. A portion 21 and three legs formed vertically below one side (the right side in FIG. 4) of the horizontal plate portion 21 are formed.
Two legs on both sides of the three legs are locking legs 22, and between the locking legs 22, a bent portion 25 is formed in a substantially U-shape, slightly more than the both locking legs 22 in the attached state. The stop leg 23 is formed so as to be bent rearward (to the right in FIG. 4). The stop leg 23 acts as a leaf spring and has a role of giving a force for stopping the upper stop fitting 2. The locking piece 24 is formed so as to have a maximum width of the three legs toward both outer sides of the lower end of the locking leg 22.

As shown in the front view of FIG. 6 and the cross-sectional view of FIG. 7, the guide fitting 3 has a falling-off prevention frame 31 for preventing the upper stopping fitting 2 from stopping and falling off, and has an upper stopping at an intermediate portion. A position adjusting recess 32 for retracting the position of the metal fitting 2 and thus the terminal screw 4 toward the female screw portion, and the guide metal fitting 3
A fixing piece 33 for preventing wobbling of itself is formed, and a guide space 34 of the upper stop fitting 2 and a leg 35 to be embedded in the terminal block 1 are formed at a lower portion.

A frame 31 for preventing the fall of the guide fitting 3 has two sleeves connected to an upper portion of a flat back plate of the guide fitting 3, and the gap between the lower ends of the both sleeves is an upper stop fitting 2. The upper stop fitting 2 is bent forward in a substantially U-shape so as to be slightly narrower than the maximum width of the locking pieces 24 which is the maximum width of the leg, and the upper end fitting 2 is pressed further inward by the elasticity of the stop leg 23. It is bent so as to have the front and rear width of the range to be performed. By bending forward, both sleeves function to prevent the upper stop fitting 2 from slipping upward, and by bending inward, both sleeves prevent the upper stop fitting 2 from dropping forward, Due to the elasticity, the upper stop fitting 2 presses the inside of the fall prevention frame 31 to perform the function of stopping upward.

When the lower end of the terminal screw 4 is located above the terminal block 1, the position of the terminal screw 4 is pushed forward from the corresponding female screw portion by the bias from the stop leg 23. A position adjusting recess 32 is provided to correct this state and to retract the position of the terminal screw 4 to match the position of the female screw portion. The position adjusting recess 32 is provided with a cutout near the center of the back plate 5 pressed by the bent portion 25 of the stop leg 23, leaving only one lower side, and the cutout piece 36 is bent slightly backward. The cutout piece 36 is engaged with a fixing concave portion 6 of the terminal block 1 described later, and prevents the guide fitting 3 from dropping upward.

The fixing piece 33 is provided with two sleeves in the middle of the flat back plate of the guide fitting 3, and the two locking pieces 24 are spaced from each other by a distance between the two sleeves being the maximum width of the upper stop fitting 2. Bending forward in a substantially U-shape so as to be wider than the width of the front side, bending the ends further inward, making cuts in the upper portions of both sleeves, and opening the part outside to abut against the partition wall It is formed. The fixing piece 33 plays a role of preventing rattling of the guide fitting 3 itself.

The embedded leg 35 is formed by extending the back plate of the guide fitting 3 downward, and forms a guide space portion 34 having a width corresponding to the bent portion 25 of the stop leg 23 of the upper stop fitting 2 in the central longitudinal direction. Have been. The bent portion 25 of the stop leg 23 of the upper stop fitting 2 enters the guide cavity 34 under a pressing force due to the elasticity of the stop leg 23.

The terminal block 1 may have a substantially normal shape, but has a fixing recess 6 behind the mounting portion of the terminal screw 4 for preventing the guide screw 3 from coming off.

[0015]

Since the present invention is configured as described above, the following effects are exhibited. First, since the present invention mounts the upper stop fitting 2 from below the guide fitting 3 and then inserts and fixes it into the terminal block 1 from above, it has strong resistance to pressure from above. became. Note that the upper stopper 2 can also be inserted into the guide 3 from above by utilizing its own elasticity due to the shapes of the fall prevention frame 31 and the locking piece 24. In such a case, the simplicity of the assembling work and the resistance to pressure from above can be increased.

Second, when the terminal screw 4 is loosened and the terminal screw 4 is moved upward, the upper stop fitting 2 is also moved upward at the same time, and the terminal screw 4 is moved slightly above the position where the terminal screw 4 comes off. In this position, the bent portion 25 of the stop leg 23 of the upper stop fitting 2 enters between the back plate of the guide fitting 3 and the fall prevention frame 31, as shown in FIG.
Is held by the elasticity of the stop leg 23, so that it is possible to mount the crimp terminal with the terminal screw 4 stopped at an upper position.

Third, since the drop-out prevention frame 31 of the guide fitting 3 prevents the upper stop fitting 2 from falling off, there is no possibility that the terminal screw 4 attached to the upper stop fitting 2 will be lost. Fourthly, since the sliding operation accompanying the vertical movement of the terminal screw 4 is performed between the fittings, the sliding operation can be smooth, and the guide fitting 3 is provided with a vertically upward stopping fitting. Since a guide groove having a width corresponding to the bent portion 25 of the second stop leg 3 is formed, a stable sliding operation is ensured.

Fourth, the position adjusting recess 32 of the guide fitting 3
Is provided with a cutout leaving only one side.
6 is slightly bent backward to form a recess, so that not only can the position of tightening the terminal screw 4 be corrected, but also the fixing recess 6 of the terminal block 1 can be modified.
And also serves as an engagement piece for preventing the guide fitting 3 from coming off above.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a terminal block having a terminal screw upper stop mechanism.

FIG. 2 is a cross-sectional view showing a state where a terminal screw is stopped at an upper position;

FIG. 3 is a sectional view showing a state where terminal screws are tightened.

FIG. 4 is a front view of an upper stop fitting.

FIG. 5 is a right side view of the upper stopper.

FIG. 6 is a front view of a guide fitting.

FIG. 7 is a sectional view of a guide fitting.

[Explanation of symbols]

 1. . . Terminal block 2. . . Upper stop bracket 3. . . Guide bracket 4. . . Terminal screw 6. . . Fixing recess 7. . . Partition wall 21. . . Horizontal plate part 22. . . Locking leg 23. . . Stop leg 24. . . Locking piece 25. . . Bent part 31. . . Captive frame 32. . . Recess 33. . . Fixing piece 34. . . Guide void 35. . . Embedded leg 36. . . Cut out piece

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-217973 (JP, A) JP-A-5-62725 (JP, A) JP-A-6-60919 (JP, A) Actually open 64-64 34723 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01R 4/38, 9/00, 9/15-9/28

Claims (1)

(57) [Claims] 1. A flat plate portion having terminal screws attached to an upper stop fitting and three legs formed downward from one side thereof, and a locking piece having two outer legs directed outward. The locking legs are formed, and the center leg is a stop leg that is bent in a substantially U-shape so that the bent portion that faces rearward in the attached state projects rearward from between the locking legs. piece, positioning recesses, the upper stop by the elasticity of the stop leg slightly narrower width than the distance between the locking piece of the both sleeves the captive frame guide bracket forming a buried leg on top of the planar rear plate upper stop bracket The fixing piece has a front-rear width within a range where the metal fitting is pressed, and the fixing piece is provided with both sleeve portions in the middle of the flat back plate of the guide metal fitting, and the interval between the both sleeve portions is the maximum width of the upper stop metal fitting. Is bent forward in a substantially U-shape so as to be wider than the width of both locking pieces, and the end thereof It is further bent inward, a cut is made in the upper part of the sleeves, and this part is opened and formed so as to abut against the partition wall on the outside, and the bent part of the stop leg of the upper stop fitting presses the position adjustment recess. A cutout is formed near the center of the back plate, leaving only one lower side, and the cutout piece is formed by slightly bending backward, and corresponds to the width of the bent portion of the stop leg which is vertically cut out in the embedded leg. A guide cavity is formed, and the upper stopper is slidably mounted so that the locking piece of the upper stopper is positioned below the fall-prevention frame of the guide. A terminal block having an upward stop mechanism for terminal screws, wherein the terminal block is buried from above in the rear of a terminal screw mounting position of a terminal block in which a fixing concave portion into which the cutout piece fits is fitted.