Connection terminals

Abstract

By forming an open window in the connection section that exposes a portion of the back of the connection hole to the outside, it becomes possible to visually confirm that the end of the conductor is in contact with the closed wall at the back of the connection hole. [Solution] The connector has a connecting part A with a connecting hole 4 into which the end of the conductor wire L is inserted, and a mounting part B that protrudes from the connecting part A. The connecting part A has a closing wall 5 that closes a part of the back of the connecting hole 4 and into which the end of the conductor wire L to be inserted can come into contact, and an opening window 6 that opens a part of the back of the connecting hole 4 outward and allows the end of the conductor wire L that is in contact with the closing wall 5 to be seen.

Description

Technical Field

[0001] The present invention relates to a connection terminal that can be used in a lightning protection system for protecting building structures and the like from lightning strikes.

Background Art

[0002] A lightning protection system is configured to connect reinforcing bars and metal structures in a building structure to the ground through conductors from a lightning rod arranged at the top of the building structure, and a connection terminal is provided at the end of the conductor to connect to the reinforcing bars and metal structures.

[0003] As disclosed in Patent Document 1, this connection terminal has a connection portion formed with a connection hole for inserting the end of the conductor and a mounting portion protruding from this connection portion. The connection portion is a bottomed cylindrical shape, and the bottom of the connection hole is a blind conical recess. After inserting the end of the conductor into the connection hole, a tapered nut is fitted for crimp connection.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above prior art, since the tapered nut is fitted to crimp-connect the end of the conductor in the connection hole, there is no need for soldering, and the construction can be easily performed. However, since the bottom of the connection hole is a blind conical recess, it is difficult to confirm whether the end of the conductor has been inserted to the bottom of the connection hole.

[0006] An object of the present invention is to provide a connection terminal that can solve such problems of the prior art.

[0007] The present invention aims to provide a type of connector terminal that allows the contact between the end of the conductor and the closed wall at the back of the connector hole to be visually confirmed by forming an open window in the connector portion that opens a portion of the back of the connector hole to the outside. [Means for solving the problem]

[0008] A specific means for solving the problems in the present invention is a connection terminal having a connection part A with a connection hole 4 into which a wire end L is inserted, and a mounting part B protruding from the connection part A, The connection part A is formed with a closing wall 5 that closes a portion of the back of the connection hole 4 and allows the end of the conductor to be inserted to abut against it, and an open window 6 that opens a portion of the back of the connection hole 4 outward, allowing the end of the conductor that abuts against the closing wall 5 to be seen. Occasionally, The connection hole (4) has a female thread formed on its inner surface, and a retaining plate (7) is positioned inside to press the inserted wire end (L) against the female thread, and the connection part (A) is provided with a set screw (8) to press the retaining plate (7) against the wire end (L). Yes, they are. [Effects of the Invention]

[0009] According to the present invention, it is possible to visually confirm from the open window 6 that the end of the conductor L is in contact with the closed wall 5 at the back of the connection hole 4, thereby ensuring a secure connection of the conductor. Furthermore, the wire ends L can be bundled together and pressed against the female screw by the retaining plate 7 without significantly disrupting their bundled state, thereby strengthening the connection of the wire ends L to the connection part A. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view showing an embodiment of the present invention in use. [Figure 2] The same plane diagram. [Figure 3] This is a side view of the same object. [Figure 4] This is a diagram illustrating the disassembly of the connection terminals. [Figure 5] This is a front view. [Figure 6] This is a rear view. [Figure 7] This is a cross-sectional view along line XX in Figure 3. [Modes for carrying out the invention]

[0011] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0012] In FIG. 1, an embodiment of a connection terminal 1 attached to a reinforcing bar connection clamp K fitted and attached to a reinforcing bar T in a building structure is shown. The conducting wire connected to the lightning rod includes a copper wire or an aluminum wire. The connection terminal 1 is also made of brass or an aluminum alloy and is formed by forging or the like.

[0013] In FIGS. 1 to 7, the connection terminal 1 is integrally formed in series with a substantially cylindrical connection portion A having a connection hole 4 for inserting the end portion L of the conducting wire and a flat plate-shaped attachment portion B protruding from the connection portion A.

[0014] The connection hole 4 of the connection portion A is open on the side opposite to the attachment portion B, but the inner part of the connection hole 4 connected to the attachment portion B is closed by a circular part (for example, substantially a semi-circle) by a closing wall 5. When the end portion L of the conducting wire is inserted into the connection hole 4, its end face comes into contact with the flat inner surface of the closing wall 5.

[0015] Also, a part of the circle (for example, substantially a semi-circle) at the inner part of the connection hole 4 of the connection portion A is opened outward by an opening window 6. This opening window 6 allows the end portion L of the conducting wire contacting the closing wall 5 to be visually recognized from the outside.

[0016] The opening window 6 can be formed by simply removing half of the inner wall of the connection hole 4, but the width W1 in the direction of the hole center is wider than the wall thickness W2 of the closing wall 5, and the inner part of the connection hole 4 is opened in the radial direction. That is, not only the inner wall of the connection portion A but also the cylindrical portion adjacent to the inner wall is removed over substantially a half circumference, making the end portion L of the conducting wire visible from the outside in the radial direction outside the connection portion A.

[0017] The inner peripheral surface of the connection hole 4 can be smoothly formed with a drill, but here a female thread is formed by tapping. The female thread can provide a catch in the removal direction for the inserted end portion L of the conducting wire.

[0018] Inside the connection hole 4, a pressing plate 7 with an arc-shaped cross-section that fits onto the end L of the conducting wire is arranged. This pressing plate 7 has holes 7b formed by punching at multiple locations vertically and horizontally. Along with the processing of these holes 7b, circular protrusions are formed on the fitting surface. These circular protrusions have sharp tips and serve as engaging protrusions 7a that can bite into the end L of the conducting wire.

[0019] At approximately the central part of the connection portion A, a female screw that penetrates into the connection hole 4 is formed and a push screw 8 is screwed in. This push screw 8 is a screw with a hexagonal socket and is screwed into the connection portion A so as to protrude from the outside to the connection hole 4. A connecting pin 9 that connects the pressing plate 7 penetrates through the axis of this push screw 8.

[0020] Although conducting wires are generally bundled, since the pressing plate 7 has an arc shape, the end L of the conducting wire can be collectively pressed against the female screw by the pressing plate 7 without significantly disrupting the bundled state. The circular engaging protrusions 7a will bite in while gathering the bundled end L of the conducting wire. At the same time as this biting-in, the female screw will also bite into the end L of the conducting wire, reliably restricting the position of the end L of the conducting wire in the direction of disconnection.

[0021] Note that although the connection terminal 1 has a pressing plate 7 and a push screw 8 for connecting to the end L of the conducting wire, these can be omitted, and soldering or compression connection can also be performed.

[0022] For example, after inserting the end L of the conducting wire into the connection hole 4 of the connection terminal 1 and confirming from the opening window 6 that its outermost end abuts against the closing wall 5, solder is injected from the release side of the connection hole 4, and solder is also injected from the opening window 6. The entire length of the end L of the conducting wire inside the connection hole 4 is soldered to the connection portion A.

[0023] Alternatively, after inserting the end L of the conducting wire into the connection hole 4 of the connection terminal 1 and confirming from the opening window 6 that its outermost end abuts against the closing wall 5, the connection portion A is compressed from the outside with a pressing tool, and the entire length of the end L of the conducting wire inside the connection hole 4 is connected to the connection portion A by the compression deformation.

[0024] In the embodiment described above, the connection terminal has a connection part A having a connection hole 4 into which the end of the conductor L is inserted, and a mounting part B protruding from the connection part A, The connection part A has a closed wall 5 that closes a portion of the back of the connection hole 4 and allows the end of the conductor to be inserted to come into contact with it, and an open window 6 that opens a portion of the back of the connection hole 4 outward, allowing the end of the conductor that is in contact with the closed wall 5 to be seen.

[0025] This configuration allows the wire end L to be securely inserted and connected to the correct position deep inside the connection hole 4 of the connection part A.

[0026] Furthermore, in the above embodiment, the width W1 of the open window 6 in the direction of the hole center is wider than the wall thickness W2 of the closed wall 5, and the back of the connecting hole 4 is open in the radially outward direction.

[0027] This configuration allows the end of the conductor L, which has been inserted all the way into the connection hole 4 of the connection part A, to be visible from the outer circumference of that end.

[0028] Furthermore, in the above embodiment, the connection hole 4 has a female thread formed on its inner circumferential surface, and a retaining plate 7 is arranged inside to press the inserted wire end L against the female thread, and the connection part A is provided with a set screw 8 to press the retaining plate 7 against the wire end L.

[0029] This configuration allows the wire ends L to be bundled together and pressed against the female screw by the retaining plate 7 without significantly disrupting their bundled state, thereby strengthening the connection of the wire ends L to the connection part A.

[0030] Furthermore, in the above embodiment, the retaining plate 7 has a cross-sectional arc shape that fits onto the end of the conductor L, and a biting projection 7a that can bite into the end of the conductor L is formed on its fitting surface.

[0031] This configuration allows for the bundled ends L of the conductors to be kept together while simultaneously restricting their movement in the direction of detachment.

[0032] Furthermore, in the above embodiment, the set screw 8 is screwed into the connection part A so as to protrude from the outside into the connection hole 4, and a connecting pin 9 that connects the retaining plate 7 is passed through the axis of the set screw 8.

[0033] This configuration allows the retaining plate 7 to be pushed and moved backward with a single set screw 8.

[0034] It should be noted that the present invention is not limited to the embodiments described above, and the shape, configuration, and combination of the components can also be changed.

[0035] For example, instead of forming a female screw thread, the connecting hole 4 may have an uneven surface facing the retaining plate 7, and instead of forming a circular projection on the mating surface of the retaining plate 7, it may have an arc-shaped projection. [Explanation of Symbols]

[0036] 1 Connection terminal 4 connection holes 5 Closing wall 6. Open windows 7. Pressing plate 7a Biting projection 7b hole 8 Set screws 9 connecting pins A Connection part B Mounting part K Rebar Connection Clamp L Conductor end T-shaped reinforcing bars W1 width W2 wall thickness

Claims

1. A connecting terminal having a connecting portion (A) having a connecting hole (4) into which a wire end (L) is inserted, and a mounting portion (B) protruding from the connecting portion (A), The connecting portion (A) is formed with a closing wall (5) that closes a portion of the back of the connecting hole (4) and allows the end of the conductor to be inserted to come into contact with it, and an open window (6) that opens a portion of the back of the connecting hole (4) outward, allowing the end of the conductor that is in contact with the closing wall (5) to be seen. The connection terminal is characterized in that the connection hole (4) has a female thread formed on its inner circumferential surface, a retaining plate (7) is arranged inside which presses the inserted wire end (L) against the female thread, and the connection part (A) is provided with a set screw (8) which presses the retaining plate (7) against the wire end (L).

2. The connection terminal according to claim 1, characterized in that the opening window (6) has a width (W1) in the direction of the hole center that is wider than the wall thickness (W2) of the closing wall (5), and the back of the connection hole (4) is open in the radially outward direction.

3. The connector according to claim 1 or 2, wherein the retaining plate (7) has a fitting surface with a cross-sectional arc shape that fits onto the end of the conductor (L), and a biting projection (7a) that can bite into the end of the conductor (L) is formed on the fitting surface.

4. The connection terminal according to claim 1 or 2, characterized in that the set screw (8) is screwed into the connection part (A) so as to protrude from the outside into the connection hole (4), and a connecting pin (9) that connects the retaining plate (7) is passed through the axis of the set screw (8).

Images