JP3040735B2 - Ground terminal mounting terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground terminal mounting terminal for fixing a ground terminal to a device to be grounded, and more particularly to a ground terminal mounting terminal used for a pull-out type submerged motor pump. In particular, when the ground terminal is attached to the ground terminal mounting terminal, the present invention twists the ground terminal or the ground terminal mounting terminal, and forms the ground terminal surface and the ground terminal mounting terminal surface facing the ground terminal. The present invention relates to a ground terminal mounting terminal that does not need to be aligned.

[0002]

2. Description of the Related Art In electric equipment such as a motor-driven pump, a grounding circuit is provided for the purpose of preventing an earth leakage accident, and, when an accident occurs, an accident current is quickly flown into the ground to prevent the damage from spreading. It is common to attach wires.

[0003] The electrical equipment is provided with a ground terminal mounting terminal. And it is common to ground the electric equipment by fixing the ground terminal crimped or brazed to one end of the ground wire to the ground terminal mounting terminal.

[0004] In a motor driven pump such as a pull-out type submerged pump, an L-shaped fitting has been generally used as a ground terminal mounting terminal.

[0005] However, the pull-out type submerged pump usually has a cylindrical shape as a whole and has an inner diameter substantially the same as the outer diameter of the pull-out type submerged pump. It was common to attach to the tank while being suspended in the vertical direction inside the provided cylinder. Therefore, the ground terminal mounting terminal is generally mounted on the top surface of the pull-out type submerged pump.

[0006]

Therefore, when the pull-out type submerged pump is mounted on the tank, the surface of the ground terminal may not be parallel to the surface of the ground terminal mounting terminal. In some cases, the ground terminal and the ground terminal mounting terminal cannot be fixed with bolts or the like.

[0007] In the pull-out type submerged pump, the ground wire is often formed integrally with the support cable for suspending the pull-out type submerged pump. Stainless wire was often used. Generally, the ground terminal was fixed to the stainless wire in advance by crimping or brazing.

Therefore, in the pull-out type submerged pump, it is almost impossible to twist the ground terminal to make the surface of the ground terminal parallel to the surface of the ground terminal mounting terminal. The ground terminal is adjusted so that the surface of the ground terminal is parallel to the surface of the ground terminal mounting terminal. Therefore, when the ground terminal mounting terminal is twisted, an unexpected strong force is applied to the ground terminal mounting terminal, and the ground terminal mounting terminal may be broken. Also, it has been difficult to twist the ground terminal mounting terminal while the draw-out type submerged pump is suspended from the upper surface of the tank.

An object of the present invention is to provide a ground terminal mounting terminal which solves the above-mentioned problems. Specifically, it is an object of the present invention to provide an earth terminal mounting terminal which does not need to be twisted in alignment with the earth terminal when the earth terminal is fixed to the earth terminal mounting terminal.

According to the present invention, not only does it not have to be twisted in alignment with the ground terminal, but also when the alignment with the ground terminal is completed, it is easily and securely fixed to a predetermined position. An object of the present invention is to provide a ground terminal mounting terminal capable of ensuring electrical connection.

[0011]

An object of the present invention is to provide a ground terminal mounting terminal comprising: (1) a ground terminal fixing member to which a ground terminal is fixed;
The holding ground the terminal fixing member rotatably, and the holding member and is secured to the equipment to be ground, the holding
Rotation to prevent rotation of earth terminal fixing member with respect to member
Ground terminal mounting terminal, characterized in that it comprises a blocking means, rotation preventing means in (2) above (1), the ground terminal
The ground terminal according to (1), which is provided on the fixing member.
The terminal with attachment, and (3) the rotation preventing means in (1),
The ground terminal mounting terminal according to (1), which is provided.
Is Le.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the ground terminal mounting terminal of the present invention has a ground terminal fixing member to which a ground terminal is fixed, a rotatable holding of the ground terminal fixing member, and an attempt to ground. And a holding member fixed to the device.

Further, in addition to the earth terminal fixing member and the holding member, an earth terminal mounting terminal provided with a rotation preventing means for preventing rotation of the earth terminal fixing member with respect to the holding member is also included in the present invention.

An example of a ground terminal mounting terminal according to the present invention will be described below with reference to the drawings.

1. FIG. 1 shows an example of a ground terminal mounting terminal according to the present invention.
It is a perspective view showing an example of a ground terminal attachment terminal provided with rotation prevention means.

The ground terminal mounting terminal shown in FIG. 1 is a terminal plate 2 which is a plate-like member fixed to a device to be grounded, for example, a pull-out type submerged motor pump, and is rotatably mounted on the terminal plate 2. And a ground terminal fixing pin 1 for fixing the ground terminal.

FIG. 2 is a perspective view showing the outline of the ground terminal fixing pin 1, and FIG. 3 is a schematic view showing the outline of the ground terminal fixing pin 1. 3A shows a side view, and FIG. 3B shows a bottom view.

FIG. 4 is a perspective view schematically showing the terminal plate 2.

As shown in FIGS. 2 and 3, the ground terminal fixing pin 1 has a semi-cylindrical ground terminal fixing portion 11 formed by cutting a cylinder along a central axis, And a fitting portion 12 having a substantially columnar shape and provided continuously at the lower end of the reference numeral 11. In the ground terminal fixing pin 1, the fitting portion 12 is rotatably fitted to the terminal plate 2.

The ground terminal fixing portion 11 has a ground terminal fixing surface 11b which is a plane to which the ground terminal is fixed.
The ground terminal fixing surface 11b is provided with a ground terminal fixing bolt hole 11a which is a screw hole into which a bolt for fixing the ground terminal to the ground terminal fixing surface 11b is screwed.

At the bottom of the fitting portion 12, the fitting portion 1
A stepped portion 13 which is a substantially columnar portion having an outer diameter larger than 2 is formed.

A slit 14 is formed in the bottom surface 15 of the ground terminal fixing pin 1 along a plane orthogonal to the ground terminal fixing surface 11b. Both ends of the slit 14 reach the outer peripheral surfaces of the fitting portion 12 and the stepped portion 13. The height of the slit 14 is lower than the height of the fitting portion 12. The slit 14 has a width enough to insert the tip of a normal flathead screwdriver. Here, the width of the slit 14 is a length measured along a direction perpendicular to the longitudinal direction of the slit 14.

On the other hand, the terminal plate 2 is a plate-like member having a substantially rectangular shape as shown in FIGS. The terminal plate 2 has two bolt holes 2a through which bolts for fixing the terminal plate 2 are passed through a device to be grounded.
The earth terminal fixing pin holding hole 2b, which is a circular opening through which the terminal plate is inserted, is disposed along the center line in the longitudinal direction of the terminal plate 2.

The ground terminal fixing pin holding hole 2b has a small diameter portion 21 having a small inside diameter and a large diameter portion 22 having a larger inside diameter than the small diameter portion 21 and having the center coincident with the small diameter portion 21. Have. The large-diameter portion 22 is connected to the small-diameter portion 2.
1 and a step is formed between the small diameter portion 21 and the large diameter portion 22. The small diameter portion 21 is larger than the outer diameter of the fitting portion 12 of the ground terminal fixing pin 1,
Further, it has an inner diameter smaller than the outer diameter of the stepped portion 13. The large diameter portion 22 has an inner diameter larger than the outer diameter of the stepped portion 13 of the ground terminal fixing pin 1.

In the ground terminal mounting terminal of FIG. 1, the ground terminal fixing pin 1 corresponds to the ground terminal fixing member of the ground terminal mounting terminal of the present invention, and the terminal plate 2 is formed of the holding member of the ground terminal mounting terminal of the present invention. And the slit 14 corresponds to the rotation preventing means in the ground terminal mounting terminal of the present invention.

The operation of the ground terminal mounting terminal shown in FIG. 1 will be described below.

FIG. 5 is a schematic view showing an example in which the ground terminal is fixed to the upper end plate of the pull-out type submerged pump via the ground terminal mounting terminal shown in FIG.

In FIG. 5, reference numeral 51 denotes an eyebolt for suspending the pull-out type submerged pump.

As shown in FIG. 5, a ground terminal 3 is crimped to a ground wire 4. The ground terminal 3 is fixed on a ground terminal fixing surface 11b provided on the ground terminal fixing pin 1 by two ground terminal fixing bolts 11c.

On the other hand, the terminal plate 2 is fixed on the upper end plate 5 of the pull-out type submerged pump by two fixing bolts 2c.

In the ground terminal fixing pin 1, the fitting portion 12 is formed by the small diameter portion 2 of the ground terminal fixing pin holding hole 2b.
1 and the stepped portion 13 is fitted into the large diameter portion 22 of the ground terminal fixing pin holding hole 2b. Therefore, before the slit 14 is extended outward, the ground terminal fixing pin 1 does not escape upward and freely rotates with respect to the terminal plate 2.

When the width of the slit 14 is increased by inserting a driver or the like into the slit 14, the outer diameters of the fitting portion 12 and the stepped portion 13 also increase.
Is a small diameter portion 21 in the ground terminal fixing pin holding hole 2b.
The stepped portion 13 is pressed against the inner wall of the large diameter portion 22 in the ground terminal fixing pin holding hole 2b. Therefore, the rotation of the ground terminal fixing pin 1 with respect to the terminal plate 2 is prevented. Accordingly, the ground terminal fixing pin 1 is fixed to the terminal plate 2 with the ground terminal fixing surface 11b facing a predetermined direction.

The state in which the width of the slit 14 is widened and the ground terminal fixing pin 1 is fixed to the terminal plate 2 will be described in detail below with reference to FIGS. FIG. 6 is a partial cross-sectional view showing the relationship between the ground terminal fixing pin 1 and the terminal plate 2 before the width of the slit 14 is widened. FIG. 7 is a view showing the ground terminal fixing when the width of the slit 14 is widened. FIG. 3 is a partial cross-sectional view illustrating a relationship between a pin 1 and a terminal plate 2.

As shown in FIG. 6, before the width of the slit 14 is increased, the fitting portion 12 of the ground terminal fixing pin 1 is engaged with the small diameter portion 21 of the ground terminal fixing pin holding hole 2b.
And the stepped portion 13 of the ground terminal fixing pin 1 has an outer diameter larger than the inner diameter of the small diameter portion 21 of the ground terminal fixing pin holding hole 2b. Has play. Therefore, the ground terminal fixing pin 1
Rotates freely with respect to the terminal plate 2,
It does not come off from the terminal plate 2 upward.

Here, when the width of the slit 14 is increased, as shown in FIG. 7, the outer peripheral surface of the fitting portion 12 has at least a portion near the stepped portion 13 of the ground terminal fixing pin holding hole 2b. It is crimped on the inner surface of the small diameter portion 21.
The outer peripheral surface of the stepped portion 13 is pressed against the inner surface of the large diameter portion 22 of the ground terminal fixing pin holding hole 2b. Thus, the rotation of the ground terminal fixing pin 1 with respect to the terminal plate 2 is prevented.

2. Description of Components of the Present Invention Hereinafter, each component of the ground terminal mounting terminal according to the present invention will be described in detail.

2-1 Earth Terminal Fixing Member In the earth terminal mounting terminal of the present invention, the earth terminal fixing member is rotatably held by a holding member described later, and has a function of electrically connecting the earth terminal and the holding member. Having.

The shape of the earth terminal fixing member may be any shape as long as the earth terminal can be securely fixed and can be rotatably held by the holding member.

As the earth terminal fixing member having such a shape, for example, an earth terminal fixing portion for fixing an earth terminal and one end of the earth terminal fixing portion are provided.
An earth terminal fixing member having a fitting portion held by the holding member can be given.

Since the ground terminal usually has a flat shape, the ground terminal fixing portion preferably has a ground terminal fixing surface which is a flat surface to which the ground terminal is fixed. Therefore, the shape of the ground terminal fixing portion is preferably a semi-cylindrical column, a prism, or a flat plate.

The angle formed between the ground terminal fixing surface and the center axis of the fitting portion is not particularly limited. Therefore, the ground terminal fixing surface and the central axis of the fitting portion may be parallel to each other as in the case of the ground terminal fixing pin 1 shown in FIGS. 2 and 3, or may be perpendicular to each other. .

The shape of the fitting portion may be, for example, a column shape. Note that a protruding portion that protrudes in the radial direction can be provided at the upper end or the lower end of the cylindrical fitting portion. Examples of the protruding portion include, for example, a stepped portion having a larger diameter than the fitting portion, a continuous or intermittent projection extending in the circumferential direction, and a C-type fitted near the bottom of the fitting portion. Retaining rings and the like can be mentioned. still,
When a C-type retaining ring is fitted near the bottom of the fitting portion, a portion of the fitting portion where the C-type retaining ring is fitted is
Preferably, a groove is provided.

In the cylindrical fitting portion, a groove extending in the circumferential direction may be formed instead of forming a projection such as a stepped portion, a projection, or a C-shaped snap ring. When a groove is formed in the fitting portion, the position where the groove is formed is not particularly limited, and the groove may be formed in any of the upper end, the lower end, and the center of the fitting portion.

The shape of the fitting portion is not only cylindrical but also
Spherical shapes are also preferred.

2-2 Holding Member In the earth terminal mounting terminal of the present invention, the holding member has a function of rotatably holding the earth terminal fixing member and a function of fixing the earth terminal fixing member to the device to be grounded. And a function of electrically connecting the ground terminal fixing member.

Devices to be grounded include all electric devices that need to be grounded. In particular, the installation space is extremely small, such as a pull-out type submerged pump, and the work space at the time of installation is very small. Are extremely limited.

In the holding member, the earth terminal fixing member may be rotatably held, for example, by holding the earth terminal fixing member so as to be rotatable around a central axis of the fitting portion. A mode in which the ground terminal fixing member is held so that the earth terminal fixing member can be rotated around the center axis of the fitting portion and at the same time can be turned upside down with respect to the holding member.

As an example of the holding member for holding the ground terminal fixing member so as to be rotatable around the central axis of the fitting portion, for example, a holding member having a circular holding hole for holding the fitting portion is provided. Can be mentioned. In addition, as the earth terminal fixing member combined with the holding member, an earth terminal fixing member whose fitting portion has a substantially cylindrical shape is preferable.

In the holding member, the holding hole is
If formed so as to have an inner diameter larger than the outer diameter of the fitting portion, the ground terminal fixing member is in a state where the substantially cylindrical fitting portion can rotate around a central axis by the holding member. Will be retained. However, in the holding member, when the inner diameter of the holding hole is too large compared to the outer diameter of the fitting portion, after the ground terminal is fixed to the ground terminal fixing member, the ground terminal fixing member is fixed to the holding member. Since it becomes difficult to fix the ground terminal fixing member to the holding member so as not to rotate freely, the holding hole is formed to have an inside diameter that has a gap-fitting relationship with the fitting portion. More specifically, it is preferable that the inner diameter is formed to have an inner diameter that is about 10 to 200 μm larger than the outer diameter of the fitting portion.

In addition to the holding member having the above-described aspect, the holding member having the holding hole may be configured so that the holding hole has a tight fit with the fitting portion as described later.
The holding member includes an outer diameter of the holding hole smaller than an outer diameter of the fitting portion, and a slit provided to communicate a peripheral portion of the holding hole and an outer peripheral portion of the holding member. Also in this holding member, the ground terminal fixing member can be freely rotated with respect to the holding member by increasing the width of the slit.

When the fitting portion is provided with a projection such as a stepped portion, a projection, or a C-shaped snap ring, the inner diameter of the holding hole is determined by the portion provided with the projection of the fitting portion. It is preferable that the inside diameter is such that the ground terminal fixing member cannot fall off. Also, as mentioned above,
In the case where the protrusion is provided in the fitting portion, a large diameter portion corresponding to the protrusion may be provided at the upper end or the lower end of the holding hole.

On the other hand, when the fitting portion is provided with a groove extending in the circumferential direction, a protrusion projecting inward is provided at a position corresponding to the groove on the inner wall of the holding hole. This is preferable in that the ground terminal fixing member can be prevented from falling off.

As an example of the holding member for holding the earth terminal fixing member so that the earth terminal fixing member rotates around the center axis of the fitting portion and can be turned upside down with respect to the holding member, the earth terminal fixing member may be used. A holding member having a socket-shaped receiving hole for receiving a fitting portion provided in the member can be given. In addition, as the earth terminal fixing member corresponding to the holding member, an earth terminal fixing member whose fitting portion has a spherical shape is preferable.

As the holding member, for example, a plate-shaped holding member provided with a bolt hole through which a bolt for fixing the holding member to a device to be grounded and a holding hole or a receiving hole can be given. Examples of such a holding member include a terminal plate shown in FIGS. 1 and 4.

In addition, as the holding member, a columnar member in which a bolt hole is provided on a side surface of a member having a cylindrical or prismatic shape and a holding hole or a receiving hole is provided on an end surface of the member. it can.

2.3 Rotation Prevention Means The rotation prevention means has a function of preventing rotation of the ground terminal fixing member with respect to the holding member.

The rotation preventing means may be provided on the ground terminal fixing member or on the holding member.

As an example of the ground terminal fixing member provided with the rotation preventing means, for example, in a ground terminal fixing member having a substantially cylindrical fitting portion, a cavity which can be expanded outward is provided inside the fitting portion. Ground terminal fixing member.

The cross section of the cavity is not particularly limited as long as it is a cavity that can be expanded outward. Therefore, examples of the cross-sectional shape of the cavity include various shapes such as a circular shape, a square shape, a rectangular shape, a polygonal shape, and a star shape, in addition to the slit-like shapes shown in FIGS. It is preferable that the cavity is opened at at least one end face of the fitting portion. Further, when the cavity has a slit-shaped cross-sectional shape, the cavity may be provided so that both ends of the cavity reach the outer peripheral surface of the fitting portion. or,
A cavity whose length along the longitudinal direction is smaller than the diameter of the fitting portion is also preferable.

In order to expand these cavities outward, for example, in the case of a ground terminal fixing member having a cavity having a slit-like cross-sectional shape, a driver is inserted into a slit-like opening, and the driver is gouged. The width of the cavity may be increased. In the case of a ground terminal fixing member having a cavity having a cross-sectional shape such as a circle, a square, a rectangle, a polygon, or a star, insert a punch or the like into an opening of the cavity and hammer the punch into the inside of the cavity. , The cavity may be expanded. Alternatively, the cavity may be expanded by inserting a plug-like member having a tapered side surface into the opening.
In the cavity of this aspect, a bar screw is erected at the center of the cavity, and a screw hole to be screwed with the bar screw is provided at the center of the plug-like member, and the screw hole provided with the plug-like member is provided. It is preferable that the plug-like member is rotated with a spanner and screwed into the opening in a state in which the ground terminal fixing member is screwed into the rod screw, because the ground terminal fixing member can be fixed to the holding member only with the spanner.

In the earth terminal fixing member having the cavity, since the outer diameter of the fitting portion is enlarged by expanding the cavity outward as described above, the holding portion into which the fitting portion is inserted is held. The outer peripheral surface of the fitting portion is pressed against the inner peripheral surface of the hole, and rotation of the ground terminal fixing member with respect to the holding member is prevented.

As an example of the holding member provided with the rotation preventing means, for example, the inside diameter of the holding hole or the receiving hole provided in the holding member is reduced, and the fitting portion inserted in the holding hole or the receiving hole is used. A holding member that prevents rotation of the ground terminal fixing member with respect to the holding member by tightening can be given.

As an example of such a holding member, a holding mechanism in which a slit is provided in a peripheral portion of a holding hole or a receiving hole and a clamp mechanism for reducing the width of the slit is provided in or near the portion where the slit is provided. Members can be mentioned. Examples of the clamp mechanism include a clamp mechanism using a screw.

As the holding member provided with the rotation preventing means,
In addition, for example, a holding hole having an inner diameter of a size that is in a tight fit relationship with a fitting portion of the ground terminal fixing member is provided in the holding member, and a peripheral edge of the holding hole and an outer peripheral portion of the holding member are provided. And a holding member provided with a slit communicating with the holding member.

In the holding member, when the tool is not inserted into the slit, the holding hole and the fitting portion are in a tight fit relationship, so that the rotation of the ground terminal fixing member with respect to the holding member is prevented. .

Here, when a suitable tool such as a pliers or a screwdriver is inserted into the slit and the hole is bored and the slit is widened, the inner diameter of the holding hole is enlarged, and the holding hole and the fitting portion are gap-fitted. State. Therefore, the ground terminal fixing member can freely rotate with respect to the holding member.

Then, if the tool is removed from the slit,
Since the width of the slit returns to the original position, the holding hole and the fitting portion are in a tight fit again, and the rotation of the ground terminal fixing member with respect to the holding member is prevented.

3. 8 shows another example of the earth terminal mounting pin shown in FIGS. 2 and 3 in which a hole having a circular cross section is provided instead of the slit as the rotation preventing means in the earth terminal mounting pin shown in FIGS. FIG. FIG.
2A is a side view, and FIG. 2B is a bottom view. In FIG. 8, 1, 11, 11a, 11b, 1
2, 13 and 15 indicate the same elements and the same elements in FIGS. 2 and 3.

In the ground terminal mounting pin shown in FIG. 8, a hole 16 is formed in the bottom surface 15 upward. The hole 16 has a circular cross section and stops inside the fitting portion 12.

The ground terminal mounting pin 1 shown in FIG.
It corresponds to the ground terminal fixing member in the ground terminal mounting terminal of the present invention. The holes 16 correspond to the rotation preventing means in the ground terminal mounting terminal of the present invention.

The ground terminal mounting pin 1 shown in FIG. 8 can be inserted into the terminal plate 2 shown in FIGS.

The ground terminal mounting pin 1 shown in FIG. 8 is inserted into the terminal plate 2 shown in FIGS. 1 and 4, and a ground terminal (not shown) is fixed to the ground terminal fixing surface 11b. Tap into the inside of the hole 16
By expanding the inside diameter of the terminal plate 2
The rotation of the ground terminal fixing pin 1 is prevented. Accordingly, the ground terminal fixing pin 1 is fixed to the terminal plate 2 with the ground terminal fixing surface 11b facing a predetermined direction.

FIG. 9 shows the ground terminal mounting pin shown in FIGS. 2 and 3 without a stepped portion in the fitting portion.
It is a perspective view which shows the example which inserted the C-type fastener instead.
In FIG. 9, 1, 11, 11a, 11b, 12,
And 14 indicate the same elements as in FIGS. 2 and 3.

In the ground terminal mounting pin shown in FIG. 9, the fitting portion 12 does not have the stepped portion 13, but has a groove 18 extending in the circumferential direction.
The mold fastener 17 is inserted. However, C-type fastener 17
The outer diameter of the small-diameter portion 21 in the ground terminal fixing pin holding hole 2b of the terminal plate 2 shown in FIGS.
And is smaller than the inner diameter of the large diameter portion 22.
Therefore, the C-shaped fastener 17 has the same function as the stepped portion 13 of the ground terminal mounting pin shown in FIGS. 2 and 3.

FIG. 10 is a perspective view showing an example in which a groove extending in the circumferential direction is formed in the fitting portion in the ground terminal mounting pin shown in FIGS. 2 and 3 instead of the stepped portion. is there. In FIG. 10, 1, 11, 11a, 11b, 1
2 and 14 indicate the same elements and the same elements in FIGS. 2 and 3.

In the ground terminal mounting pin shown in FIG.
The fitting portion 12 does not have the stepped portion 13, and instead has a groove 18 extending in the circumferential direction.

FIG. 11 is a perspective view showing an example of a terminal plate that can be combined with the ground terminal mounting pin of FIG. In FIG. 11, 2, 2a and 2b correspond to FIG.
4 and the same elements as those in FIG.

In the terminal plate 2 shown in FIG. 11, a projection 23 extending in the circumferential direction is provided inside the ground terminal fixing pin holding hole 2b.

FIG. 12 shows a state in which the ground terminal mounting pin of FIG. 10 is fitted to the terminal plate of FIG. In FIG. 12, 1, 11, 11a, 11b, 11c, 1
4, 2, 2b, 2c, 3, 4, 5, and 51 indicate the same elements and the same elements in FIG. When the fitting portion 12 of the ground terminal fixing pin 1 is fitted in the ground terminal fixing pin holding hole 2b, as shown in FIG. 12, the groove 18 provided in the fitting portion 12 holds the ground terminal fixing pin. The ground terminal fixing pin 1 is held by the terminal plate 2 so as to be rotatable and not to fall down in the vertical direction by fitting with the protrusion 23 provided in the hole 2b.

In the ground terminal mounting pin of FIG.
By expanding the slit 14 with a driver or the like, the rotation of the ground terminal fixing pin 1 with respect to the terminal plate 2 is prevented. Accordingly, the ground terminal fixing pin 1 is fixed to the terminal plate 2 with the ground terminal fixing surface 11b facing a predetermined direction.

FIG. 13 is a perspective view showing an example of a ground terminal mounting terminal in which a rotation preventing means is provided on a holding member. FIG. 14 is a perspective view schematically showing a ground terminal mounting pin which is a ground terminal fixing member in the ground terminal mounting terminal of FIG. 13. FIG. 15 is a perspective view of a terminal plate which is a holding member of the ground terminal mounting terminal of FIG. It is a perspective view showing an outline.

In FIGS. 13 to 15, 1, 11a, 1
1b, 12, 2, 2a, and 2b indicate the same elements as those in FIGS.

In the ground terminal mounting terminal shown in FIG. 13, the ground terminal mounting pin 1 has a semi-cylindrical shape obtained by cutting a cylinder in half along the center axis, similarly to the ground terminal mounting pin 1 shown in FIGS. Ground terminal fixing part 11 having shape
And a fitting portion 12 having a substantially columnar shape and continuously provided at a lower end of the ground terminal fixing portion 11.

However, unlike the ground terminal mounting pin 1 shown in FIGS. 2 and 3, no cavity such as a slit is provided inside the ground terminal mounting pin 1. The fitting portion 12 has a groove 18 into which the terminal plate 2 fits. On the other hand, as shown in FIG. 15, the terminal plate 2 is provided with a slit 24 for communicating the peripheral portion of the ground terminal fixing pin holding hole 2 b and the peripheral portion of the terminal plate 2. The inner diameter of the ground terminal fixing pin holding hole 2b is slightly smaller than the outer diameter of the fitting portion 12 at the bottom of the groove 18. Therefore, the ground terminal fixing pin holding hole 2b
And the bottom of the groove 18 in the fitting portion 12 are in a tight fit relationship.
The rotation of the ground terminal mounting pin 1 is prevented.

In the ground terminal mounting terminal of FIG. 13, the ground terminal mounting pin 1 corresponds to the ground terminal fixing member of the ground terminal mounting terminal of the present invention, and the terminal plate 2 corresponds to the holding member of the ground terminal mounting terminal of the present invention. Corresponding to The ground terminal fixing pin holding hole 2b and the slit 24 correspond to the rotation preventing means in the ground terminal mounting terminal of the present invention.

In the ground terminal mounting terminal shown in FIG. 13, when a ground terminal (not shown) is fixed to the ground terminal mounting pin 1, a suitable tool such as a pliers or a screwdriver is inserted into the slit 24 and the slit is opened to expand the slit 24. Thereby, the inner diameter of the ground terminal fixing pin holding hole 2b can be enlarged. As a result, a gap is formed between the ground terminal fixing pin holding hole 2b and the bottom of the groove 18, so that the ground terminal mounting pin 1 can freely rotate with respect to the terminal plate 2. After fixing the ground terminal to the ground terminal mounting pin 1, if the tool is removed from the slit 24, the inner diameter of the ground terminal fixing pin holding hole 2 b returns to its original state. The relationship between the groove 12 and the bottom of the groove 18 reverts to an interference fit relationship. As a result, the rotation of the ground terminal fixing pin 1 with respect to the terminal plate 2 is stopped again, and the ground terminal fixing pin 1 is fixed to the terminal plate 2 with the ground terminal fixing surface 11b facing a predetermined direction. .

[0087]

According to the present invention, when the earth terminal fixed to the end of the earth wire is fixed, there is no need to twist the earth terminal mounting terminal to align with the earth terminal. A mounting terminal is provided.

Further, according to the aspect of the present invention having the rotation preventing means, when the alignment with the ground terminal is completed, the ground terminal fixing member can be easily and surely fixed, and the equipment to be grounded is provided. A ground terminal mounting terminal is provided which makes the electrical connection between the ground terminal and the ground terminal more secure.

According to the aspect of the present invention, in which the outwardly expandable cavity is provided inside the ground terminal fixing member, a tool such as a punch or a screwdriver is inserted into the interior of the cavity. By simply enlarging the above, there is provided an earth terminal mounting terminal which can easily fix the earth terminal fixing member to the holding member without any special tool.

Further, a holding hole which is tightly fitted to the ground terminal fixing member is provided in the holding member, and a slit communicating the peripheral portion of the holding hole and the outer peripheral portion of the holding member is provided in the holding hole. In the earth terminal mounting terminal of the aspect including the holding member, by inserting a tool such as a driver into the slit, the earth terminal fixing member can be rotated with respect to the holding member, and can be inserted into the slit. If the tool is removed, rotation of the ground terminal fixing member with respect to the holding member is prevented, so that no special operation is required to fix the ground terminal fixing member to the holding member.

Further, in the earth terminal mounting terminal of the present invention, if the holding member is formed of a metal material having a higher thermal expansion coefficient and the earth terminal fixing member is formed of a metal material having a lower thermal expansion coefficient, the liquefied natural When this earth terminal mounting terminal is used in a pull-out type submerged pump that handles cryogenic liquid such as gas, liquid nitrogen, or liquefied ethylene, it is cooled to cryogenic temperature by the handling liquid, and the earth terminal mounting is performed. Since the holding member of the terminal contracts more than the ground terminal fixing member, the ground terminal fixing member is securely fixed by the holding member.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a ground terminal mounting terminal provided with rotation preventing means, among ground terminal mounting terminals according to the present invention.

FIG. 2 is a perspective view schematically showing a ground terminal fixing pin included in the ground terminal mounting terminal of FIG. 1;

FIG. 3 is a schematic view schematically showing a ground terminal fixing pin shown in FIG. 2;

FIG. 4 is a perspective view schematically showing a terminal plate of the ground terminal mounting terminal of FIG. 1;

FIG. 5 is a schematic view showing an example in which the ground terminal is fixed to the upper end plate of the pull-out type submerged pump via the ground terminal mounting terminal shown in FIG. 1;

FIG. 6 is a partial cross-sectional view showing the relationship between the ground terminal fixing pin and the terminal plate before the width of the slit of the ground terminal fixing pin shown in FIGS. 2 and 3 is increased.

FIG. 7 is a partial cross-sectional view showing the relationship between the ground terminal fixing pin and the terminal plate when the width of the slit of the ground terminal fixing pin shown in FIGS. 2 and 3 is increased.

FIG. 8 is a schematic diagram showing an example in which holes having a circular cross section are provided in place of the slits in the ground terminal mounting pins shown in FIGS. 2 and 3.

FIG. 9 is a perspective view showing an example in which a stepped portion is not provided in a fitting portion in the ground terminal mounting pin shown in FIGS. 2 and 3, and a C-shaped fastener is fitted instead. is there.

10 is a perspective view showing an example in which a groove extending in a circumferential direction is formed in a fitting portion in the ground terminal mounting pin shown in FIGS. 2 and 3 instead of the stepped portion. It is.

FIG. 11 is a perspective view showing an example of a terminal plate that can be combined with the ground terminal mounting pin of FIG. 10;

12 is a schematic diagram showing a state in which the ground terminal mounting pin of FIG. 10 is fitted to the terminal plate of FIG. 11;

FIG. 13 is a perspective view showing an example of a ground terminal mounting terminal provided with a rotation preventing means on a holding member.

FIG. 14 is a perspective view schematically showing a ground terminal mounting pin which is a ground terminal fixing member in the ground terminal mounting terminal of FIG. 13;

FIG. 15 is a perspective view schematically showing a terminal plate as a holding member in the ground terminal mounting terminal of FIG. 13;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ground terminal mounting pin, 11 ... Ground terminal fixing part, 11a ... Ground terminal fixing bolt hole, 11b
..Grounding terminal surfaces, 12 ... fitting parts, 13 ...
Stepped portion, 14 ... slit, 15 ... bottom surface, 16
... Hole, 17 ... C-shaped retaining ring, 18 ... Groove, 2 ・
..Terminal plates, 2a ... bolt holes, 2b
..Grounding terminal fixing pin holding holes, 21...
2 ... small diameter part, 23 ... protrusion, 24 ... slit, 3 ... ground terminal, 4 ... ground wire, 5 ...
Top plate of pull-out type submerged pump, 51 ... eye bolt

Claims (3)

(57) [Claims] An earth terminal fixing member to which an earth terminal is fixed, and the earth terminal fixing member rotatably held,
And a holding member fixed to a device to be grounded ,
Rotation of the ground terminal fixing member with respect to the holding member.
A ground terminal mounting terminal, comprising: a rotation preventing means for preventing rotation . 2. The rotation preventing means according to claim 1,
2. The device according to claim 1, wherein the device is provided on a ground terminal fixing member.
Ground terminal mounting terminal. 3. The rotation preventing means according to claim 1,
The ground terminal according to claim 1, which is provided on the holding member.
Mounting terminal.