JP2795409B2 - Joint box structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to the structure of a joint box that branches an electric wire from a power supply side into a plurality of loads and performs feed wiring. [Background Art] Conventionally, a lock spring and a release button are used to connect or disconnect an electric wire not only in a joint box in which an electric wire from a power supply side is sent to a plurality of loads and wired, but also in a general wiring device. . That is, an elastic lock spring is used to connect the conductor of the electric wire to the terminal plate in the appliance, and a release button is pressed against the lock spring to release the contact of the conductor. Generally, a driver is used to drive this release button, but the wire release hole for inserting this driver is open in the direction perpendicular to the wire insertion direction, and the driver is inserted in the direction perpendicular to the wire insertion direction. The release button was pressed. Therefore, there was a problem that the driver could not hold. [Object of the invention] The present invention has been provided in view of the above points,
The purpose of the release of the electric wire is to provide a structure of a joint box in which the tool is inserted from the insertion direction of the electric wire and the tool can be easily held. [Disclosure of the Invention] (Configuration) According to the present invention, a conductive terminal plate block, one end of which is connected to an electric wire on the power supply side and the other end of which is connected to an electric wire on the load side, is housed in a case. A terminal spring is provided in the terminal plate block with a resilient lock spring for elastically contacting the conductor of the electric wire inserted through the perforated insertion hole to the terminal plate block to be brought into contact with the terminal plate block. A release button for releasing the contact between the plate block and the conductor of the electric wire is provided in the case, and is opened in the insertion direction of the electric wire, and the axial direction thereof is inclined with respect to the insertion direction of the electric wire, and the electric wire into which the tool is inserted. By providing a release hole in the case, by making the inside of the wire release hole a space where a tool is inserted between the ceiling surface of the wire release hole inclined toward the upper direction of the release button and the upper surface of the release button,
When the tool is inserted into the wire release hole that opens in the wire insertion direction and its axial direction is inclined with respect to the wire insertion direction, the tool tip is guided by the ceiling surface of the wire release hole and the release button is pushed downward. As a result, the conductor of the electric wire can be smoothly released from the terminal plate block by pressing the lock spring through the release button smoothly. Hereinafter, embodiments of the present invention will be described with reference to the drawings. A case 1 made of an insulating material is composed of a body 2 and a cover 3, and a terminal plate block 4 is housed and arranged on the bottom surface of the body 2. The joint box of the present invention connects the electric wire 5 of a three-core VVF cable, and branches one electric power source-side electric wire 5 into three loads. Therefore, the terminal plate block 4 is configured to be connected to four wires 5 each having three conductors 5a, and has the following configuration. That is, the terminal plate block 4 is configured by combining a plurality of terminal plate units 8a and 8b as shown in FIGS. The terminal plate units 8a and 8b include a pair of conductive terminal plates 6 and 6 and a conductive substantially U-shaped lead plate 7. Dowels 6a project from both sides of the upper piece 6b of the terminal plate 6, respectively. Both ends of the lead plate 7 are L-shaped fixed pieces 7a
Are formed, and the above-mentioned dowel 6a is formed in a hole formed in the fixing piece 7a.
And the so-called dowels are connected, so that the lead plate 7 and the terminal plates 6, 6 are integrated. The terminal plate 6 and the lead plate 7 may be connected by spot welding. Lock springs 10 are respectively arranged on the lower pieces 9 on both sides of the terminal plate 6 as described later. Here, as shown in FIG. 5, the lead plate 7 is joined to the left side of the terminal plate 6 to form a terminal plate unit 8a,
As shown in FIG. 6, the lead plate 7 is joined to the right side of the terminal plate 6 to form a terminal plate unit 8b. As described above, the joint box of the present invention is configured such that one electric wire 5 is connected to the power supply side and three electric wires 5 are connected to the load side, and the electric wire 5 has three cores. 4 terminals require a total of 12 terminals. Therefore, the terminal plate block 4 is configured by using three terminal plate units 8a and 8b. FIG. 7 shows one terminal plate unit 8a.
FIGS. 3A to 3D show a case where two terminal plate units 8b are used in combination. FIGS. FIG. 8 shows a case where two terminal plate units 8a and one terminal plate unit 8b are combined, and FIGS. 8A to 8D show examples of the respective combinations.
Which of these combinations is used for the terminal block 4
May be formed. The terminal plate block 4 eventually uses six terminal plates 6, and a storage recess 11 for storing and arranging the terminal plates 6 is provided on the bottom surface of the body 2 via an insulating wall 12, as shown in FIG. Each is formed. As shown in FIGS. 2 and 11, a rib 13 is provided at the center of the storage recess 11 so as to protrude integrally with the body 2. Further, ribs 14 are provided on both sides of the rib 13.
Are protruding respectively. On the other hand, a notch 15 in which the rib 13 fits is formed in a lower portion of the center portion of the terminal plate 6, and a notch 16 in which the rib 13 fits is formed in a notch.
Further, a protrusion 15a is formed on the opening side of the notch 15 so as to face the same. When the terminal plate 6 is stored in the storage recess 11, when the rib 13 fits into the notch 15, Projection 15a is rib 13
At the same time, the rib 13 is press-fitted into the cutout 15 and the terminal plate 6
Can be temporarily fixed in the storage recess 11. Also,
The rib 14 fits into the other notch 16 as well. The rib 14 fits into the notch 16 to prevent the terminal plate 6 from warping. In this manner, the terminal plate 6 can be temporarily fixed to the storage recess 11, that is, the terminal plate block 4 can be temporarily fixed to the body 2, thereby facilitating the assembly workability. Next, the lock spring 10 is arranged on the terminal plate 6 of the terminal plate block 4 as follows. The end of the terminal plate 6 has a structure as shown in FIG. 9. The end of the upper piece 6b formed with the dowel 6a is formed with a notch 20, and the L-shaped lower piece 9 is formed at the lower part. It is formed integrally. A protrusion 18 and a protrusion 19 protruding from the inner side surface of the central piece 21 of the terminal plate 6 are cut out in a stepwise manner in the lateral direction. The lower piece 9 is provided with a projection 17 on the projection 19 side. On the other hand, one end of the elastic lock spring 10 is substantially L
L-shaped piece 10a is formed, and the other end is substantially S-shaped.
A character-shaped piece 10b is formed. Here, the protrusion 19 is the lock spring 10
The protrusion 18 is formed at a height lower than the protrusion 19 and higher than the protrusion 17. When the lock spring 10 is housed in the end of the terminal plate 6 as shown by an arrow in the figure as shown in FIG.
Of the terminal plate 6 by sliding the center piece 10c of the
Positioned between 7 and 18, the lock spring 10 is
The lock spring 10 is temporarily fixed to the terminal plate 6 in such a manner as to sandwich the central piece 10c. Then, the lock spring 10 is moved to
The curved portion 10e of the character-shaped piece 10b is slid until it comes into contact with the rising piece 9a of the lower piece 9. At this time, the curved portion 10d of the S-shaped piece 10b
4 (b) and FIG. 10, the projection 19 is located therein, and the lock spring 10 is disposed at a regular position on the lower piece 9 of the terminal plate 6. L-shaped piece of arranged lock spring 10
The tip of 10a is located below the upper piece 6b and the notch 20. Here, if the lock spring 10 is to be arranged in the opposite direction to that shown in FIGS. 9 and 10, when the lock spring 10 is slid to the rising piece 9a side, the L-shaped piece of the lock spring 10 is moved. 10a corresponds to the projection 19, so that the lock spring 10 cannot be incorporated into the terminal plate 6. That is, the projection 19 is a lock spring.
It is for 10 reverse set prevention. Thus, the lock spring 10 is
Since the temporary fixing can be performed by the joints 7 and 18, and the reverse assembly is prevented by the protrusions 19, the inserting direction of the lock spring 10 into the terminal plate 6 can be unified, and the assembling work can be facilitated. A groove 22 having a semicircular cross section is formed on each side of the storage recess 11 of the body 2, and the groove 22 and the groove on the cover 3 side are shown in FIGS. 3 and 4 (d). Thus, the insertion hole 23 into which the electric wire 5 is inserted is formed. Cover 3 and body 2
Holes 24 and 25 are respectively formed in the holes, and a pin 26 for caulking is inserted into the holes 24 and 25, and as shown in FIG.
The cover 26 is caulked to fix the cover 3 and the body 2 so that they cannot be easily disassembled. At the center of the cover 3 and the body 2, mounting holes 27 and 28 are formed, respectively, and the joint box is fixed by the mounting holes 27 and 28. Wire release holes 29 at both ends of both sides of cover 3
This wire release hole 29 is inserted into the insertion hole 23 of the wire 5.
It is opened in the same direction as the direction of insertion into the device. As shown in FIG. 1, the electric wire releasing hole 29 has an insertion hole
It is inclined about 10 ° with respect to the 23 axial directions. A release button 30 is arranged in an electric wire release hole 29 formed in the cover 3, and the release button 30 is arranged above the L-shaped piece 10 a of the lock spring 10. . Here, release button 30
The lower end of the lock spring 10 has a structure that can be pressed into contact with the L-shaped piece 10a of the lock spring 10 having three sets. The assembly of the joint box is performed as follows. First, the lock springs 10 are temporarily fixed to the terminal plates 6 as described above, and the two terminal plates 6 and one lead plate 7 are connected to form terminal plate units 8a and 8b. And 3
The terminal plate block 4 is constituted by the two terminal plate units 8a and 8b, and the terminal plate block 4 is temporarily fixed to the body 2. Also,
The release button 30 is disposed in the wire release hole 29 of the cover 3, the body 2 is aligned with the cover 3, and the cover 3 and the body 2 are fixed by the pins 26. When the cover 3 and the body 2 are fixed, the ribs 32 formed on the ceiling surface of the cover 3
And the terminal plate 6, that is, the terminal plate block 4.
Is securely fixed in the body 2. A partition rib 33 is formed at the center of the end face of the cover 3 and the end face of the body 2 so that the feed side and the power supply side of the electric wire 5 can be easily distinguished. FIG. 4B shows a state in which the electric wire 5 is not connected. As shown in FIG. 4B, the lower end 30a of the release button 30 corresponds to the upper end of the L-shaped piece 10a of the lock spring 10. FIG. 1 shows a state where the electric wires 5 are connected. That is, by inserting the electric wire 5 into the insertion hole 23 and further inserting the conductor 5a of the electric wire 5 between the terminal plate 6 and the lock spring 10, the conductor 5a is elastically contacted by the lock spring 10 and Contact Next, when the conductor 5a is detached from the terminal plate 6, the following operation is performed. A driver 31 as a release tool is inclined with respect to the electric wire 5 and inserted into the electric wire release hole 29 as shown by the arrow in the figure, and the release button 30 is pressed downward and driven. As a result, the lower end 30a of the release button 30 is
The L-shaped piece 10a is pressed downward to contact the L-shaped piece 10a.
Is released, and the electric wire 5 can be easily removed. When the electric wire 5 is removed and the screwdriver 31 is removed, the release button 30 returns to the original position in the electric wire release hole 29 by the return force of the L-shaped piece 10a of the lock spring 10. Here, the release operation of the release button 30 is performed simultaneously on the three conductors 5a of the electric wire 5. In addition, it may be performed separately. [Effects of the Invention] As described above, according to the present invention, a conductive terminal plate block having one end connected to a power supply-side electric wire and the other end connected to a load-side electric wire is housed in a case, and the case is provided in the case. A terminal spring is provided in the terminal plate block with a resilient lock spring for elastically contacting the conductor of the electric wire inserted through the perforated insertion hole to the terminal plate block to be brought into contact with the terminal plate block. A release button for releasing the contact between the plate block and the conductor of the electric wire is provided in the case, and is opened in the insertion direction of the electric wire, and the axial direction thereof is inclined with respect to the insertion direction of the electric wire, and the electric wire into which the tool is inserted. A release hole is provided in the case, and the inside of the electric wire release hole is a space in which a tool is inserted between the ceiling surface of the electric wire release hole and the upper surface of the release button which are inclined in the upper direction of the release button. When you insert the tool into the wire release hole, the tool tip Is guided by the ceiling surface of the wire release hole, and the release button is naturally pressed downward.As a result, it is possible to smoothly press the lock spring via the release button to release the conductor of the wire from the terminal plate block. In addition, since the wire release hole is opened in the wire insertion direction and the axial direction is inclined with respect to the wire insertion direction, the tip of the tool is inserted into the wire release hole to hold the tool. Therefore, it is possible to easily release the electric wire.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a perspective view of a joint box of the same,
4 (a) to 4 (d) are a cutaway plan view, a cutaway front view, a bottom view and a cutaway side view of the joint box of the above, FIG. 5 is a perspective view of one terminal plate unit of the above, and FIG. FIG. 7A is a perspective view of the other terminal plate unit of the above.
(D) and FIGS. 8 (a) to 8 (d) are views showing an example of combination of the terminal plate unit of the above, FIG. 9 is an exploded perspective view of a main part of the same, and FIG. FIG. 11 is a cross-sectional view showing a state where the terminal plate is pressed into a body. 1 is a case, 4 is a terminal plate block, 5 is an electric wire, 5a is a conductor, 13 is a rib, 15 is a cutout, 17, 18 are protrusions, 19 is a protrusion, 2
3 is an insertion hole, 29 is a wire release hole, and 30 is a release button.

   ────────────────────────────────────────────────── ─── Continuation of front page       (56) References Japanese Utility Model Showa 55-43375 (JP, U)                 Shokai 55-158622 (JP, U)                 63-72858 (JP, U)

Claims (1)

(57) [Claims] A conductive terminal plate block, one end of which is connected to the electric wire on the power supply side and the other end of which is connected to the electric wire on the load side, is housed in the case, and the conductor of the electric wire inserted through the insertion hole drilled in the case. A lock spring having elasticity for elastically contacting the terminal plate block with the terminal plate block is provided in the terminal plate block, and is pressed and driven by a tool to press the lock spring to release the contact between the terminal plate block and the conductor of the electric wire. A button is provided in the case, and is opened in the direction of insertion of the electric wire, and an axial direction thereof is inclined with respect to the direction of insertion of the electric wire. The structure of the joint box is a space in which a tool is inserted between the ceiling surface of the wire release hole inclined in the direction of the upper surface of the release button and the upper surface of the release button. 2. 2. The terminal plate block according to claim 1, wherein a projection for temporarily fixing the lock spring from both sides and a projection for preventing reverse assembly in the assembly and insertion direction of the lock spring are formed on the terminal plate block.
Structure of the joint box described in the item. 3. A notch portion for press-fitting the rib erected on the bottom surface of the case is formed in the terminal plate block, and the notch portion is press-fitted to the rib to temporarily fix the terminal plate block. The structure of the joint box according to claim 1. 4. 2. The joint box structure according to claim 1, wherein the terminal block includes a terminal plate forming a two-pole or three-pole electric path.