JP3273160B2 - Locking device for spacer damper for multi-conductor transmission line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer damper for a multi-conductor transmission line which is installed between transmission lines to maintain a constant interval between the transmission lines. The present invention relates to a locking device for a spacer damper for a multi-conductor power transmission line that can be gripped and that can be safely and quickly installed on a power transmission line.

[0002]

2. Description of the Related Art As means for transmitting electric power to a demand area,
It is common to use a transmission line installed on a power transmission tower, and today, multi-conductor transmission lines capable of transmitting a large amount of power due to an increase in power demand are used.

[0003] However, most of such transmission lines use aluminum wires which are inexpensive and lightweight at present for reasons such as economy. Such an aluminum transmission line has a drawback that its strength is inferior to that of a conventional copper wire. Therefore, in order to prevent the transmission lines from oscillating due to wind or the like and from being damaged by the transmission lines coming into contact with each other, the distance between the transmission lines is maintained and the vibration of the oscillating transmission lines is absorbed. Measures have been taken.

That is, as shown in FIG. 1, a spacer damper 2 for absorbing a vibration transmitted to a transmission line 3 and maintaining a constant interval between the transmission lines is provided at a predetermined interval in the transmission line. It is installed in.

FIG. 2 is a perspective view showing one embodiment of the spacer damper 2 of the prior art, and FIG. 4 is a partial side sectional view showing another embodiment of the spacer damper of FIG. A description will be given with reference to a partial excerpt sectional view of the lock device.

The locking device 4 shown in FIGS.
When the cover 7 is closed by gripping the transmission line 3 in the holding grooves 9, 6 of the cover 5 and the fixing arm 5, the head of the T-bolt 11 passes through the space between the [mold fixing grooves 8] of the cover and projects upward. .

At this time, when the T-bolt 11 is rotated by 90 °, the head of the T-bolt 11 is supported on both upper sides of the mold fixing groove 8 so that the cover 7 is not opened. Then, the T-bolt 11 is pulled while the fixed spring 12 in the compressed state is restored, and the cover 7 and the fixed arm 5 are elastically brought into close contact with each other to grip the transmission line 3.

On the other hand, the lock device 21 shown in FIG.
The power transmission line 3 is held between the cover 3 and the fixed arm 22 and the double head bolt 24 is tightened to grip the power transmission line 3. The power transmission line 3 is always tightened to the cover 23 and the fixed arm 22 with a constant force. As described above, the break portion 25 of the double-head bolt 24 breaks when the tightening force exceeds a predetermined value.

Therefore, when the operator grips the transmission line 3 with the cover 23 and the fixed arm 22 and tightens the double-headed bolt 24 with a certain force or more, the cut portion 25 is cut off, whereby the transmission line 3 is properly fitted. It can be tightened with a strong tightening force.

However, the above two types of conventional spacer dampers for multiconductor transmission lines have the following problems.

In other words, the locking device 4 for the spacer damper shown in FIGS. 2 and 3 requires another tool to rotate the T-bolt 11 by 90 °.
At the time of work at a high place, it was necessary to replace the tool with another tool in order to tighten the T-bolt, and it was pointed out that the work was dangerous and troublesome.

The locking device 21 of the spacer damper shown in FIG. 4 not only requires a relatively large force when cutting the broken portion 25 by rotating the double-headed bolt 24 at a high working place. When the large force is applied to cut the broken portion 25 of the double-headed bolt 24, there is a very serious problem that the impact loses the balance of the operator, and there is a danger of falling.

The supervisor who checks whether the locking device 21 of the spacer damper shown in FIG. 4 has been properly applied, or not, checks with the telescope or the like whether the broken portion 25 of the double-headed bolt 24 has been cut from the ground. In order to pass such an inspection and to avoid danger on the steel tower, the operator has to confirm that the double-head bolt 24 has a broken portion 2 on the ground.
After cutting 5 in advance, it may be ascended to a steel tower to perform work.

Thus, there has been a problem that the cover 23 and the fixed arm 22 are not tightened with an appropriate fastening force, so that the wire is damaged or the wire cannot be prevented from swinging.

There is also a problem that the spacer damper lock device 21 shown in FIG. 4 cannot properly cope with expansion and contraction of the transmission line due to climate change.

That is, the power transmission line 3 expands and contracts due to a change in climate, and the diameter thereof fluctuates. However, the double-headed bolt 24 that has been tightened once cannot follow the fluctuation of this diameter. There were problems such as the transmission line 3 being damaged and the shaking caused by the loosening of the transmission line 3 during contraction, which cannot be prevented.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, when the cover is closed on the fixed arm, the round head bolt is automatically locked to the lock plate, and the end of the round head bolt is closed. A ball bearing installed between the end of the adjusting bolt minimizes the contact resistance when the adjusting bolt rotates, and smoothly rotates the T-bolt by another tool. An object of the present invention is to make it possible to safely and promptly perform an operation of fixing and supporting a transmission line at a high place to a spacer damper without requiring a conventional operation of cutting a broken portion of a bolt.

[0018]

In order to achieve the above object, the present invention provides a support frame for a spacer damper (31).
A fixed arm (34) having one end coupled to the arm (32);
Cover hinged to the other end of the fixed arm (34)
(38), fixing the free end side of the cover (38)
When locked to the arm (34), the transmission lines face each other
The semicircular grip grooves (35, 39) for gripping (3) are fixed
The fixed arm (34) and the cover (38)
Open / closeable multi-conductor power line spacer dam
Par locking device with horizontal and vertical surfaces
A pair of lock plates (4
2) a semicircular guide groove (43) in the center of the horizontal plane
In addition, it is a configuration in which an insertion hole is formed in the vertical surface,
The fixed arm (34) has an insertion opening on its outer surface.
Groove (36), located on both sides of the insertion groove (36)
The through hole (36a) penetrating and the bottom wall of the insertion groove (36)
A through hole (37) penetrating and opening to the cover (38) side;
Are formed, and the guide grooves (43) face each other and are circular.
Insert the lock plate (42) into the insertion groove (3
6) With the inner wall of the insertion groove (36)
Spring between vertical surface of lock plate (42)
(44), the through hole (36a) and the
A pair of guide rods penetrate the opposing insertion holes.
(45) is supported on the fixed arm (34), and the cover
In (38), when the guide grooves (43) are closed,
An opening is formed to match the hole (37), and
The extension (40) forming the storage space communicating therewith has a shape.
A round head bolt (46) having a round head
The round head is connected to the opening, the through hole (37), and the circular hole.
Through the insertion groove (36) and lock play
In the storage space while being locked to
In the storage space, the round head bolt (46) is pulled back.
A fixed spring (47) is provided so that
An adjusting bolt (50) for adjusting sexual power is provided. Further, spherical contact grooves (46b, 5b ) are formed in the contact portion of the round head bolt (46) and the contact portion of the adjustment bolt (50).
0b) , and a ball bearing (52) is provided between the ball bearing and the spherical support groove.

With such a configuration, in the spacer damper for a multi-conductor power transmission line, when the cover is closed to the fixed arm, the round head bolt is automatically locked to the lock plate, and the end of the round head bolt is the end of the adjusting bolt. By using a ball bearing installed between the bolts to minimize the contact resistance when the adjustment bolt rotates, it rotates smoothly, so that another tool can be used to rotate the T-bolt by 90 ° or cut the broken part of the double head bolt. Work such as is unnecessary.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A spacer damper for a multi-conductor power transmission line according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 5 is a partial sectional view showing a locking device for a spacer damper for a multiconductor power transmission line according to the present invention.
FIG. 7 is an exploded perspective view of the locking device of the spacer damper of the present invention, and FIGS. 7 to 9 are cross-sectional views showing the use state of the locking device of the spacer damper of the present invention. In the reference numerals of the drawings, reference numerals 35 and 39 denote grip grooves for multi-conductor power transmission lines, 36 denotes an insertion groove, 36a denotes a guide rod insertion hole, and 37 denotes a guide rod insertion hole.
Through hole, 41 is hinge pin, 43 guide groove 45 guide rod 48 is a washer, 49 denotes a nut.

As shown in FIGS. 5 to 9, the spacer damper for a multi-conductor power transmission line according to the present invention has a lock device 33 as a waist of the present invention installed on each side of the support frame 32 of the spacer damper 31. . This locking device 33 is a support frame 32 of the spacer damper 31.
And a cover 38 which is hingedly mounted on the other end of the fixed arm 34 and which is locked and unlocked.

The fixed arm 34 has one end connected to the spacer damper support frame 32, a multi-conductor power transmission line grip groove 35 formed inside the other end, and an insertion groove 36 formed outside the other end. In addition, guide holes 36a are formed in both side walls of the insertion groove 36.

The cover 38 is connected to the other end of the fixed arm 34 by a hinge pin 41. Inside the cover 38, another holding groove 39 is formed so as to face the holding groove 35 formed in the fixed arm 34. Have been. On the other side of the holding groove 39, an extension 40 having a space in which a fixed spring 47, a washer 48, a nut 49, and a round head bolt 46 described later can be installed is formed.

In the insertion groove 36 of the fixed arm 34, L
A pair of lock plates 42 formed in a letter shape are installed so as to face each other, and a semicircular guide groove 43 is formed at one end of the pair of lock plates 42. The lock plate 42 is positioned so that the pair of guide grooves 43 face each other, and is installed such that the pair faces the insertion groove 36 of the fixed arm 34 so that a round head bolt 46 described later can enter.

Here, between the lock plate 42 and the insertion groove 36, the lock plate 42 is elastically supported, and a pair of springs 44 are provided on the outside of the pair of lock plates 42 so as to correspond to the inside. A guide rod 45 is provided on the pair of lock plates 42, and the lock plate 42 is transported along the guide rod 45.

The round head bolt 46, which is a main component of the present invention together with the lock plate 42, has a round head portion of the cover 3.
A storage portion is provided in the cover 38 and the extension portion 40 so as to protrude out of the grip groove 39 of FIG. A washer 48 and a nut 49 are fastened to the receiving portion in which the round head bolt 46 is received, and a fixed spring 4 is provided between the washer 48 and an inner surface corresponding to the extension portion 40.
7, the round head of the round head bolt 46 is pulled toward the grip groove 39 side of the cover 38, and an adjusting bolt 50 is fastened to the outer end of the extension 40, and the fixing spring 4 is fixed.
7 is controlled.

FIGS. 10 and 11 show another embodiment of the present invention. In the drawing, reference numerals 46a and 50a denote contact portions, 46b and 50b denote spherical support grooves, and 53 denotes a nut for preventing unraveling. The spherical support grooves 46b are provided in the contact portion 46a of the round head bolt 46 and the contact portion 50a of the adjustment bolt 50, respectively. , 50b
The ball bearing 52 is provided between the spherical support grooves 46b and 50b to minimize the contact resistance between the contact portion 46a of the round head bolt 46 and the contact portion 50a of the adjustment bolt 50. Thus, the adjustment bolt 50 is configured to be able to rotate smoothly.

FIG. 12 is a partial sectional view showing an open key required for releasing the lock device of the present invention. The open key is used to release the gripping state of the gripped power transmission line. The open key 51 is used to open the lock plate 42 outward so that the fixed arm 34 and the cover 38 are expanded. It is constituted and is formed from a wire member having elasticity.

The operation of the present invention configured as described above will be described in detail with reference to the accompanying drawings. To hold the transmission line 3 using the spacer damper for a multi-conductor transmission line according to the present invention, the cover 38 is opened from the fixed arm 34 as shown in FIGS. Insert the transmission line 3 into 35. Next, the cover 38
Is coupled to the fixed arm 34, and the transmission line 3 is gripped between the holding groove 35 of the fixed arm 34 and the holding groove 39 of the cover 38. This will be specifically described as follows.

If the lock device 33 is to grip the transmission line 3 with the fixed arm 34 and the cover 38 open, the cover 38 is inserted after the transmission line 3 is inserted into the holding groove 35 of the fixed arm 34. Is rotated about the hinge pin 41 as shown in “a” in FIG. 7, and the round head of the round head bolt 46 installed upward on the upper part of the extension part 40 becomes the through hole 37 of the fixed arm 34. , Comes into contact with the holes of the two guide grooves 43 formed in the lock plate 42.

In this state, when the cover 38 is pushed upward continuously, the force for pushing up the cover 38 is stronger than the elasticity of the two-sided springs 44 compressing the two-sided lock plates 42 inward. Meanwhile, the round head of the round head bolt 46 passes upward through the hole formed by the two guide grooves 43. After the round head penetrates the guide groove 43, the body of the round head bolt 46 has a smaller diameter than the outer diameter of the round head, so that the lock plates 42 on both sides shrink inward due to the elasticity of the spring 44. Wrap the lower neck of the round head.

As described above, the two guide grooves 43 enclose the lower end neck portion of the round head, so that the round head engages with the horizontal portion of the lock plate 42 to cover the fixed arm 34 with the cover 3.
8 are combined. As described above, when the fixed arm 34 and the cover 38 are connected by the hinge pin 41, the transmission line 3 is inserted into the respective holding grooves 35 and 39 formed between the hinge part, the round head bolt 46 and the lock plate 42. Is inserted, and the transmission line 3 is gripped.

As described above, the adjustment bolt 50 supporting the lower end of the round head bolt 46 in a state where the power transmission line 3 is gripped.
Is rotated in the reverse direction to disengage and separate from the extension portion 40, and the round head bolt 46, which has been applied to the adjustment bolt 50 by the elastic force of the fixed spring 47 and prevented from moving downward, is lowered by the elastic force of the fixed spring 47. To a predetermined length. In addition, the tip of the round head bolt 46 engages with the lock plate 42 and the round head bolt 46 cannot be lowered, so that the fixed arm 34 and the cover 38 elastically come into close contact with each other. Thereby, the holding groove 35 of the fixed arm 34
Transmission line 3 sandwiched between holding grooves 39 between
It is held firmly.

As described above, when the transmission line 3 is gripped by the elasticity of the fixed spring 47 and the holding grooves 35 and 39, the transmission line 3 is deteriorated or the outer diameter is expanded or reduced due to a change in climate. In addition, the transmission line 3 can be elastically and stably gripped.

Then, as shown in FIGS. 10 and 11,
The other embodiment of the present invention has the same basic configuration and operation as the above embodiment, except that the contact portion 46a of the round head bolt 46 and the contact portion 50a of the adjustment bolt 50 have spherical support grooves. 46b and 50b are formed, and a ball bearing 52 is provided between each of the spherical support grooves 46b and 50b. When the adjusting bolt 50 supporting the lower end portion of the round head bolt 46 is rotated in the reverse direction in the state where the power transmission line 3 is gripped as described above, the spherical support grooves 46 are used.
Since the frictional resistance is reduced by the ball bearings 52 located at positions b and 50b, the contact portions 46 of the round head bolts 46 are reduced.
a and the contact resistance between the contact portion 50a of the adjustment bolt 50 is minimized, and the adjustment bolt 50 can be smoothly rotated with a small force.

When the lock device 33 is opened for repair work of the transmission line 3 or replacement work due to aging of the transmission line 3 or the like, as shown in FIG. In a state where both sides of the provided open key 51 are contracted inward, the both sides are locked on both sides of the lock plate 4.
When the external force applied to the open key 51 is removed, and the external force applied to the open key 51 is removed, the resilient force of the open key 51 causes the both side portions to spread outward and the both side lock plates 42 to spread outward.

Since the elastic force of the open key 51 acts stronger than the elastic force of the spring 44 elastically supported so as to contract the lock plate 42 inward, the lock plates 42 on both sides move outward while being guided by the guide rods 45. As a result, the distance between the guide grooves 43 between the lock plates 42 on both sides is increased.

When the space between the guide grooves 43 on both sides is widened in this way, the head of the round head bolt 46 engaged with the lock plates 42 on both sides is detached from the guide grooves 43, so that the cover 38 can be opened. . When the cover 38 is opened, the pair of lock plates 42 are contracted inward by the elastic force of the spring 44 pressing inward.

As described above, the fixed arm 34 and the cover 38
After the repair of the power transmission line 3 or the replacement of the deteriorated power transmission line 3 in a state where the cable is opened, the work can be easily performed by pushing up the cover 38 and closing it.

[0040]

As described above, in the spacer damper for a multi-conductor power transmission line according to the present invention, when the cover is closed on the fixed arm, the round head bolt is automatically locked to the lock plate, and the end of the round head bolt is The ball bearing installed between the ends of the adjusting bolt minimizes the contact resistance when the adjusting bolt rotates so that the adjusting bolt can be smoothly rotated. Therefore, since it is not necessary to rotate the T-bolt by 90 ° with another tool or cut the broken part of the double-headed bolt with another tool as in the related art, the transmission line at a high place is connected to the spacer damper. There is an excellent effect that the work of fixing and supporting can be performed easily, safely and quickly.

Although the present invention has been described in detail with reference to the embodiments, the present invention is not limited to the above-described embodiments, and those skilled in the art having ordinary knowledge in the technical field to which the present invention pertains may claim the present invention. Naturally, modifications or changes can be freely made within the scope of the technical idea described in the above.

[Brief description of the drawings]

FIG. 1 is a partial side view showing a state where a spacer damper is installed on a transmission line.

FIG. 2 is a perspective view and a partial cross-sectional view of a conventional spacer damper lock device.

FIG. 3 is a perspective view and a partial sectional view of a conventional spacer damper lock device.

FIG. 4 is a partial sectional view showing another embodiment of the conventional locking device for the spacer damper.

FIG. 5 is a partial sectional view showing a locking device for a spacer damper of the present invention.

FIG. 6 is an exploded perspective view of the locking device of the spacer damper of the present invention.

FIG. 7 is a cross-sectional view illustrating a use state of the locking device of the spacer damper of the present invention.

FIG. 8 is a cross-sectional view showing a used state of the locking device of the spacer damper of the present invention.

FIG. 9 is a cross-sectional view illustrating a use state of the locking device of the spacer damper of the present invention.

FIG. 10 is a sectional view of a waist extract showing another embodiment of the present invention.

FIG. 11 is an enlarged cross-sectional view of a waist portion showing an “A” part of FIG. 10 in an enlarged manner.

FIG. 12 is a partial sectional view showing an open key required for releasing the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 31 Spacer damper 32 Support frame 33 Lock device 34 Fixed arm 38 Cover 40 Extension part 42 Lock plate 44 Spring 46 Round head bolt 47 Fixed spring 50 Adjustment bolt 51 Open key 52 Ball bearing

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H02G 7/00

Claims (2)

(57) [Claims] 1. A support frame for a spacer damper (31).
Arm (34) having one end coupled to the arm (32)
And a camera hinged to the other end of the fixed arm (34).
Bar (38), and the free end of the cover (38)
When locked to the fixed arm (34),
Semicircular grip grooves (35, 39) for gripping the electric wire (3)
To the fixed arm (34) and cover (38)
A multi-conductor power transmission line spacer that can be opened and closed.
In the damper lock device, a pair of lock plates (42) having a horizontal plane and a vertical plane and having an L-shaped cross section are provided with a semicircular guide groove (43) at the center of the horizontal plane and a vertical plane. An insertion hole is formed in the fixed arm (34).
Groove (36), located on both sides of the insertion groove (36)
The through hole (36a) penetrating and the bottom wall of the insertion groove (36)
A through hole (37) penetrating and opening to the cover (38) side;
Are formed so that the guide grooves (43) face each other and form circular holes.
The lock plate (42) is placed inside the insertion groove (36).
In the inserted state, the inner wall of the insertion groove (36) and the lock plate (4)
2) Make spring (44) elastic between the vertical plane and
And a through hole (36a) and the insertion hole opposed thereto.
Fix the pair of guide rods (45) so that
The guide groove (43) is closed on the cover (38).
At this time, an opening is formed to match the through hole (37).
Extension that forms a storage space communicating with it
(40) is formed, and a round head bolt (46) having a round head is inserted in front of the round head.
Insert through the opening, through hole (37), and the circular hole.
Projects into the groove (36) and engages with the lock plate (42).
In the storage space, the round head bolt (46) is pulled back in the storage space.
Is provided with a fixed spring (47).
An adjusting bolt (50) for adjusting is provided.
That, scan pacer damper of the locking device for a multi-conductor transmission line. 2. A spherical support groove (46b, 5 ) is formed in a contact portion of the round head bolt (46) and a contact portion of the adjustment bolt (50).
0b) and each forming the locking device of the spacer damper for a multi-conductor transmission line according to claim 1, characterized in that the ball bearing (52) is installed between the spherical support groove.