KR101713272B1 - Jumper cable clamp apparatus for overhead transmission line - Google Patents

Abstract

The present invention relates to a jumper line connecting and fixing device for an overhead transmission line. The jumper line connecting and fixing device according to an embodiment of the present invention includes: combination plates (10) which are combined with both sides of a transmission tower (1), respectively; a lower fixing unit (20) including a first body (21) in which an empty space is formed, a first receiving unit (22), and a first latching protrusion (11a); an upper fixing unit (30) including a second body (31) having an empty space formed therein, a second receiving unit (33), and a second latching protrusion (11b); an insulator protection tub (40) which is located between the lower fixing unit (20) and the upper fixing unit (30); a connection fixing pipe (50); a latching fixing unit (80); and a release separating unit (90) for releasing the restraint state of the lower fixing unit (20) and the upper fixing unit (30). Therefore, the present invention can stably protect, connect and fix a jumper line and the overhead transmission line.

Description

{JUMPER CABLE CLAMP APPARATUS FOR OVERHEAD TRANSMISSION LINE}

The present invention relates to a jumper wire connection and fixing apparatus for a transmission line, and more particularly, to a jumper wire connection and fixing apparatus for a jumper wire, And more particularly to a jumper wire connection and fixing device for a working transmission line which can easily perform a jumper replacement operation in a one-touch manner.

Generally, most of the electricity supplied to each customer is transmitted through transmission lines that are installed in almost all areas such as cities and suburbs. The types of transmission lines include underground lines directly buried with electric power lines in the ground, Or a concrete line) and a processing line that supports and installs a power line in the air above a predetermined height on the ground using an insulator.

The underground cable has the merit of simple installation because it does not need additional auxiliary devices, but it is buried in the ground without a separate insulation medium and is in direct contact with the ground. Therefore, the embedded power line itself has surge voltage and commercial frequency voltage There is a problem in that it is costly to manufacture because it must be manufactured so as to be able to be insulated.

Due to these cost problems, machined lines are now the mainstream of transmission lines, and the ratio of machined lines is expected to continue to increase steadily in the future.

The processing line is composed of a power line for transporting electric power supplied to the actual customer, a neutral ground line for inducing the generated current due to the processing ground line for reducing the brain voltage induced in the electric power line due to the lightning stroke and the unbalance factor, According to the method, it can be divided into two types, namely, a suspension type and a built-in type.

In the case of the built-in type, both ends of the power line are fixedly supported on both sides of the steel tower for positioning the machining line at a predetermined height from the ground via separate internal clamps, and then the power lines are interconnected through the jumper wires At this time, in order to support a jumper wire crossing both sides of the steel tower at a predetermined distance from the steel tower, a horizontal steel pipe is fixed at a predetermined distance from the steel tower, and then a jumper wire is fixed to the outer surface of the steel pipe, And a jumper device for supporting the jumper is used.

However, when the jumper device is vibrated in the wind direction by the wind which is blown in a direction perpendicular to the jumper wire after the jumper device is installed, if there is such vibration, the jumper wire and the jumper device It is economical to reduce the amount of vibration as much as possible. Accordingly, by adding a weight for inhibiting lateral displacement to the steel pipe for horizontal material, it is possible to reduce the amount of vibration, .

In order to mount the weight for inhibiting lateral displacement on the steel pipe for horizontal welding, conventionally, the support shaft is welded to one side of the upper peripheral surface of the horizontal steel pipe, and the horseshoe-shaped lateral weight for restraining the horseshoe- After the installation, a separate support shaft is welded and fixed again so as to be connected to the outermost heavy member. Finally, a hole having a predetermined diameter is formed in the upper part of the support shaft on both sides, So that the mounted weight for restraining lateral displacement was prevented from falling out.

However, when the above-mentioned method is used to install the heavy weight for suppressing the lateral displacement, it is difficult to fix them when the number of the installation is increased, because the outer diameter is increased as the number of the installation is increased. There is a problem in that the number of components is increased because there is a limitation in heightening the weight of the unit quantity.

Therefore, in order to improve this, conventionally, there has been proposed a jumper device for a machining power transmission line which is fixedly mounted at a predetermined distance from a steel tower and has a steel pipe for supporting a jumper wire and a large number of weight for inhibiting lateral displacement, Was developed.

As compared with the above-described technique, the lubrication characteristics are excellent and the aesthetic appearance is advantageous. However, since the lubrication restraining weight is used in the same manner as the above-described technique, the appearance is not so good, There is a problem in that it is difficult to fix them when the number is increased and the number of parts is increased due to the limitation in raising the weight of the unit water as well as the weight of the windshield.

In order to solve the above-mentioned problems, there has been recently proposed a jumper wire comprising a body having a predetermined shape for mutually separating and supporting the respective wires constituting the jumper wire, a plurality of clamping arms provided at equal intervals along the outer circumferential surface of the body, And a clamp which is formed to protrude from an end of each of the clamp arms and supports the respective leads, has been developed.

It is connected to a jumper wire which connects electric power lines connected to both sides of the built-in steel tower of the transmission power transmission line electrically to each other. When the vibration is caused by wind or other electric accident through self weight and support force, So that it is possible to maintain a constant gap without colliding with each of the wires constituting the wire.

In general, a jumper wire connection and fixing device for a transmission line is generally provided with a support on the arm end of a transmission tower, an upper end of the jumper wire support insulator is fixed to the support, a jumper wire is fixed to the lower end of the jumper wire support insulator .

When the jumper wire is fixed in such a structure, the fixing device is excessively stiff like the jumper wire support insulator, which causes a problem that the jumper wire is easily broken by the vibration force applied continuously.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Registration No. 10-0228417 (published on Nov. 01, 1999, entitled Jumper Device for Working Transmission Line).

The jumper device according to the prior art is relatively light in weight, and therefore, there is a problem that the jumper device hits the transmission line or the steel tower during vibration caused by wind or other electric accidents.

In addition, since the jumper device according to the prior art is designed to minimize the lateral displacement of the jumper wire by using a heavy load, the jumper device can not be installed quickly and easily. There is a problem in that it provides an advantageous space.

Further, the jumper device according to the prior art has a problem in that when the device is vibrated by strong wind or other electric accidents, it is difficult to effectively prevent lateral displacement through a heavy object, thereby causing partial destruction of the line or the steel tower , There is a problem that a safety accident due to a fall of a heavy object may occur.

In addition, the jumper device according to the related art has a problem that it causes an adverse effect such as slacking because the load is transferred to the power transmission line, and the necessary minimum distance between the jumper device and the steel tower is increased, have.

Therefore, there is a need for improvement.

The present invention can connect and fix jumper wires and transmission machining lines while stably protecting them, facilitate connection between parts for fixing jumper wires, and make jumper wire replacement work easier by one-touch method. And to provide a jumper wire connection fixing device for a line.

The present invention is characterized by comprising: an engaging plate (10) coupled to both side surfaces of a transmission tower (1) and having an engagement step (11) formed with a through hole (12) A first body 21 having an upper portion, a front portion and a rear portion opened and an empty space formed therein, a first seat portion 21 formed at an upper end of the vertical walls on both sides of the first body 21, A lower fixing part 20 including a coupling stopper 22 and a first locking protrusion 11a positioned on an upper portion of a coupling plate 10 coupled to the outer surface of the power transmission pylon 1 of the coupling plate 10. [ ; A second body 31 having an upper portion, a front portion and a rear portion opened and having an empty space formed therein and having an installation hole 32 penetrating upwardly and downwardly from a bottom surface thereof; A second seating part 33 which is formed at the upper end of the joining plate 10 and which is bent in the horizontal direction toward the outside and a joining plate 10 which is located below the joining plate 10, An upper fixing part 30 including a second locking step 11b; An insulator protector 40 disposed through the installation hole 32 of the upper fixing part 30 and positioned between the lower fixing part 20 and the upper fixing part 30 and having an insulator 3 inserted therein, ); The jumper wire 4 has a hollow tube shape so that the jumper wire 4 can be inserted therein and a part of the jumper wire 4 is inserted into the insulator 3 so that one end of the jumper wire 4 inserted therein can be connected to the insulator 3 And the other end of the jumper wire 4 inserted into the lower fixing part 20 is connected to the transmission transmission line 2 installed on the power transmission pylon 1, A connecting fixture tube 50 which penetrates the vertical wall of the power transmission line 2 and is bent toward the transmission line 2; A hook fixing part 80 for connecting the lower fixing part 20 to the first locking step 11a and connecting the upper fixing part 30 to the second locking step 11b, ); And a release separator 90 for releasing the restricting state of the lower fixing part 20 and the upper fixing part 30 by driving the retaining part 80 in a reverse direction.

In addition, the latch fixing portion of the present invention may include: an insertion rail formed in the first and second seating portions and having a latching groove; A sliding groove portion formed in the first and second engaging jaws so that the insertion rail can be slid and inserted; A working space part provided at one side of the sliding groove part and communicating with the sliding groove part by a connection hole part; A latching protrusion provided so as to protrude / retract from the operating space portion toward the sliding groove portion and provided with an inclined surface opposed to the insertion rail; And an elastic member interposed between the locking projection and the operating space portion.

The releasing and separating portion of the present invention further comprises: a wire extending from the engaging projection to the outside of the engaging plate; And a lever member installed on the wire and disposed to be exposed to the outer surface of the coupling plate.

The jumper wire connection and fixing device for a working transmission line according to the present invention includes a connection fixing pipe, a lower fixing part and an upper fixing part which can be connected and fixed while stably protecting the insulator, the jumper wire, the jumper wire and the transmission- There is an advantage that the insulator and the jumper wire can be prevented from flowing.

In addition, since the jumper wire connection and fixing device for a processed transmission line according to the present invention includes a fastening portion for fastening the upper fixing portion and the lower fixing portion to the engagement jaw in a one-touch manner, the upper fixing portion and the lower fixing portion can be easily installed There is an advantage that the time and cost required for installing the jumper wire can be reduced.

Further, since the jumper wire connection and fixing apparatus for a processed transmission line according to the present invention includes a release separating portion for separating the upper and lower fixing portions from the jaws, the upper and lower fixing portions can be easily So that the time and cost required for maintenance and management of the jumper wire can be reduced.

1 is an exploded perspective view illustrating a jumper wire connection fixture for a working transmission line according to an embodiment of the present invention.
2 is a perspective view showing a jumper wire connection fixing device for a working transmission line according to an embodiment of the present invention.
3 is an exploded perspective view illustrating a fastening portion of a jumper line connection fixture for a machined transmission line according to an embodiment of the present invention.
4 is a cross-sectional view of a jam fixing part and a release part of a jumper line connection fixing device for a working transmission line according to an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a jumper connecting and securing apparatus for a working transmission line according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is an exploded perspective view illustrating a jumper wire connection and fixing device for a working transmission line according to an embodiment of the present invention, and FIG. 2 is a view illustrating a jumper wire connection and fixing device for a working transmission line according to an embodiment of the present invention FIG. 3 is an exploded perspective view illustrating a jam fixing portion of a jumper line connection fixture for a transmission line according to an embodiment of the present invention. FIG. 4 is a perspective view of a jumper wire for a transmission line, Sectional view showing the retaining portion and releasing portion of the connection fixing device.

1 to 4, a jumper wire connection and fixing device for a working transmission line according to an embodiment of the present invention includes a coupling plate 10, a lower fixing part 20, an upper fixing part 30, An insulator protector 40, a connection fixing pipe 50, a retaining portion 80, and a release separator 90.

The coupling plate 10 is welded or bolted to both sides of the power transmission tower 1 and is provided with spacing jaws 11 in the vertical direction. The through hole 12 is formed to fix the lower fixing part 20 and the upper fixing part 30 to each other.

The lower fixing part 20 includes a first body 21, a first seating part 22, and a first spiral coupling part 23.

The first body 21 has upper and lower front and rear openings and a hollow space formed therein. The first seat 22 is horizontally arranged inward from the upper end of the vertical walls on both sides of the first body 21, And is seated on the upper end of the engagement protrusion 11 of the coupling plate 10 of the coupling plate 10 coupled to the outer surface of the transmission tower 1. The first spiral coupling portion 23 Is formed on the bottom surface of the first seat portion 22 and penetrates through the through hole 12 of the engaging jaw 11 and is formed with a spiral on the outer peripheral edge thereof, .

The upper fixing part 30 includes a second body 31, a second seat part 33, and a second screw engagement part 34.

An installation hole 32 is formed in the bottom surface of the second body 31 so as to pass through the second body 31 in an upward and downward direction. Is horizontally bent outward from the upper ends of the vertical walls on both sides of the second body 31 and is seated on the upper end of the coupling plate 10 of the coupling plate 10 which is coupled to the inner surface of the power transmission pylon 1, The second helical joining portion 34 is formed on the bottom surface of the second seating portion 33 and passes through the through hole 12 of the engaging jaw 11 and has a spiral formed on the outer peripheral edge thereof, The upper fixing part 30 is installed on the coupling plate 10 so that the insulator protector 40 is interposed between the lower fixing part 20 and the upper fixing part 30, Is formed.

The bending prevention rods 70 are further interposed between the lower fixing portion 20 and the upper fixing portion 30 so that the lower fixing portion 20 and the upper fixing portion 30 are bent and deformed. So as to secure the structural stability.

The insulator protector 40 is installed in the space formed between the lower fixing part 20 and the upper fixing part 30 through the installation hole 32 of the upper fixing part 30, Is formed on the bottom surface of the upper fixing part (30) formed around the mounting hole (32) so as to have a diameter larger than the diameter of the mounting hole (32), and an insulator (3) ) Are fixed and protected.

It is preferable that a hole is formed on the bottom surface of the insulator protector 40 so that the jumper wire 4 can pass therethrough and be connected to the transmission line 2.

Further, a fall preventing ring 60, which is bolted or welded to the upper end of the insulator protector 40, is further joined to the upper end of the insulator 3 to prevent the insulator 3 from falling.

The connection fixing pipe 50 is formed in a hollow tube shape while being divided into a plurality of pieces so that the jumper wire 4 can be inserted therein and a part of the connection fixing pipe 50 is connected to the bottom of the lower fixing part 20, (4) can be connected to the insulator (3).

Another part of the connection fixing pipe 50 is bent toward the transmission working line 2 provided in the transmission tower 1 through the vertical wall of the lower fixing part 20 and inserted into the jumper wire 4 So that the other end can be connected to the transmission working line 2, and the connection fixing pipe 50 protects the jumper wire 4 to ensure stability.

The present embodiment is characterized in that the lower fixing part is engaged with the first step 11a so as to be coupled thereto and the upper fixing part is engaged with the second step 11b so as to connect the fixing part 80, 80) in the opposite direction to release the restraint state of the lower fixed portion and the upper fixed portion, so that the lower fixed portion and the upper fixed portion can be coupled to the engagement jaw in a one-touch manner, It is possible to easily separate the lower fixing portion and the upper fixing portion by operating the release separating portion 90 to replace the jumper wire.

The engaging and fixing part 80 includes insertion rails 81 and 181 formed on the first and second seating parts 22 and 33 and formed with a locking groove 81a, Sliding grooves 82 and 182 formed on the first and second jaw portions 11a and 11b so as to be able to slide and be inserted into the sliding groove portions 82 and 182, And an operating space 82a connected to the sliding grooves 82 and 182 to be in communication with the sliding grooves 82 and 182 and to be inserted into and retracted from the operating space 82a toward the sliding grooves 82 and 182, And a resilient member 86 interposed between the engaging protrusion 84 and the operating space portion 82a.

Therefore, when the first seating portion 22 of the lower fixing portion is slid from the front side to the rear side so as to seat the first seating portion 22 on the upper surface of the first jaw portion 11a, the first insertion rail 81 is inserted along the first sliding groove portion 82 The engaging protrusion 84 is retracted to the inside of the operating space portion 82a and the elastic member 86 is inserted while being compressed.

When the first insertion rail 81 is inserted to the inner side end of the first sliding groove portion 82, when the locking projection 84 is disposed to face the locking groove portion 81a, The engaging groove 84 is inserted into the engaging groove 81a while being protruded to the inside of the sliding groove portions 82 and 182 to engage with each other.

Since the inclined surfaces 84a opposed to the insertion rails 81 and 181 are formed at the ends of the locking projections 84 when the insertion rails 81 and 181 are inserted into the sliding groove portions 82 and 182, 181 are pressed against the inclined surface 84a to retract the engaging projection 84 to the inside of the operating space portion 82a and the engaging projection 84 is disposed so as to face the engaging recessed portion 81a to release the pressing force, The restoring force of the member 86 causes the engaging protrusion 84 to protrude into the sliding groove portions 82 and 182 to be inserted into the engaging groove portion 81a to restrain the inserting rails 81 and 181. [

The first seating portion 22 of the lower fixing portion is fixed to the first jaw portion 11a by one-touch operation and the second seating portion 33 of the upper fixing portion is fixed to the second jaw portion 11b by the above- So that the jump line can be easily installed.

The releasing and separating portion 90 includes wires 92 and 94 extending from the engaging projection 84 to the outside of the engaging plate and a lever member 96 provided on the wires 92 and 94 and arranged to be exposed to the outer wall of the engaging plate, When the operator pulls the lever member 96 to the outside of the engagement plate, the engaging protrusion 84 is retracted to the inside of the operating space portion 82a by the tension that the wires 92 and 94 are pulled, The locking projection 84 is detached.

Since the restraint state of the locking projection 84 is released by the above-described operation, the operator can separate the lower fixing portion and the upper fixing portion from the engagement jaws and perform the replacement operation of the jump line.

A passage hole portion 97 is formed on the back surface of the operation space portion 82a so that the passage hole portion 97 extending from the operation space portion 82a formed in the first step portion 11a is bent downward, The passage hole portion 97 extending from the operating space portion 82a formed in the jaw portion 11b is bent upward so that the pair of passage hole portions 97 are connected to each other at the central portion of the coupling plate, (97) from the connecting portion to the front surface of the coupling plate.

The first wire 92 extending from the first jaw portion 11a extends downward along the passage hole portion 97 and the second wire 94 extending from the second jaw portion 11b extends along the passage hole portion 97 And the first wire 92 and the second wire 94 are engaged with each other at the central portion of the coupling plate to be exposed to the outside of the coupling plate along the passage hole portion 97 extending to the front surface of the coupling plate.

Since the lever member 96 is engaged with the ends of the wires 92 and 94 exposed to the outside of the coupling plate, the lever member 96 is placed on the outer wall of the front surface of the coupling plate, and the elastic force of the elastic member 86 The wires 92 and 94 are held in tension by being pulled inwardly of the passage hole portion 97.

As described above, the first wire 92 and the second wire 94 according to the present embodiment are connected to each other at the center of the passage hole portion 97, and along the passage hole portion 97 formed in a ' The worker pulls the one lever member 96 to engage with the engaging projection 84 provided in the first sliding hole 82 and the engaging projection 84 provided in the second sliding groove 182. [ , That is, the pair of locking projections 84 can be simultaneously moved to the inside of the operating space portion 82a.

Reference numeral 98a denotes a first guide roller 98a for supporting the bent portion of the first wire 92 so that the first wire 92 is bent downwardly and 98b denotes a second guide roller 98b for supporting the bent portion of the first wire 92 in the downward direction And a second guide roller 98b that supports the bent portion of the second wire 94 so as to be bent into a curved shape.

As a result, it is possible to connect and fix the jumper wire and the transmission-processed wire while stably protecting it, to easily connect the parts for fixing the jumper wire, and to easily connect the jumper wire to the working transmission wire It is possible to provide a jumper wire connection fixing device for a jumper wire.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

Also, the jumper wire connection and fixing device for the transmission line is described as an example, but the connection fixing device of the present invention can also be used for other products other than the jumper wire connection fixing device for the transmission line.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: engaging plate 11: engaging jaw
12: through hole 20: lower fixing portion
21: first body 22: first seat part
23: first screw engagement portion 30: upper fixing portion
31: second body 32: installation hole
33: second seat portion 34: second spiral engagement portion
40: insulator protector 50: connection fixing pipe
60: Fall prevention ring 70:
80: retaining portion 81, 181: insertion rail
81a: engagement grooves 82, 182:
82a: operating space portion 82b: connecting hole portion
84: locking protrusion 84a: inclined surface
84b: stopper 86: elastic member
90: releasing part 92: first wire
94: second wire 96: lever member
97: passage hole portion 98a: first guide roller
98b: second guide roller

Claims (3)

A coupling plate 10 coupled to both side surfaces of the power transmission tower 1 and having an engagement protrusion 11 formed at an interval to form a through hole 12 in a vertical direction;
A first body 21 having an upper portion, a front portion and a rear portion opened and an empty space formed therein, a first seat portion 21 formed at an upper end of the vertical walls on both sides of the first body 21, A lower fixing part 20 including a coupling stopper 22 and a first locking protrusion 11a positioned on an upper portion of a coupling plate 10 coupled to the outer surface of the power transmission pylon 1 of the coupling plate 10. [ Wow;
A second body 31 having an upper portion, a front portion and a rear portion opened and having an empty space formed therein and having an installation hole 32 penetrating upwardly and downwardly from a bottom surface thereof; A second seating part 33 which is formed at the upper end of the joining plate 10 and which is bent in the horizontal direction toward the outside and a joining plate 10 which is located below the joining plate 10, An upper fixing part 30 including a second locking step 11b;
An insulator protector 40 disposed through the installation hole 32 of the upper fixing part 30 and positioned between the lower fixing part 20 and the upper fixing part 30 and having an insulator 3 inserted therein, );
The jumper wire 4 has a hollow tube shape so that the jumper wire 4 can be inserted therein and a part of the jumper wire 4 is inserted into the insulator 3 so that one end of the jumper wire 4 inserted therein can be connected to the insulator 3 And the other end of the jumper wire 4 inserted into the lower fixing part 20 is connected to the transmission transmission line 2 installed on the power transmission pylon 1, A connecting fixture tube 50 which penetrates the vertical wall of the power transmission line 2 and is bent toward the transmission line 2;
A hook fixing part 80 for connecting the lower fixing part 20 to the first locking step 11a and connecting the upper fixing part 30 to the second locking step 11b, );
And a release separator (90) for driving the retainer (80) in a reverse direction to release the restraint state of the lower retainer (20) and the upper retainer (30)
The retainer (80)
Insertion rails (81, 181) formed in the first and second seating parts (22, 33) and forming a locking groove part (81a);
Sliding grooves 82 and 182 formed on the first and second locking protrusions 11a and 11b so that the insertion rails 81 and 181 can slide and be inserted;
A working space portion 82a provided at one side of the sliding groove portions 82 and 182 and communicating with the sliding groove portions 82 and 182 by a connection hole portion 82b;
A locking protrusion (84, 184) provided so as to protrude / retract from the operating space portion (82a) toward the sliding groove portion (82, 182) and provided with an inclined surface (84a) opposed to the insertion rail (81, 181); And
And an elastic member (86) interposed between the engagement protrusions (84, 184) and the operation space portion (82a)
The release separator (90)
Wires (92, 94) extending from the engagement protrusions (84, 184) to the outside of the engagement plate (10); And
And a lever member (96) installed on the wires (92, 94) and exposed to the outer wall of the coupling plate (10)
A passage hole portion 97 is formed in the back surface of the operation space portion 82a and the passage hole portion 97 extending from the work space portion formed in the first jaw portion 11a is bent downward, The passage hole portion 97 extending from the operating space portion 82a formed in the first chamber portion 11b is bent upward and a pair of the passage hole portions 97 are connected to each other at the center portion of the coupling plate 10 , Extending from a portion where a pair of the passage hole portions (97) are connected to the front surface of the coupling plate (10)
The first wire 92 and the second wire 94 are connected to each other at the center of the passage hole portion 97 and are formed along the passage hole portion 97 formed in a "Lt; / RTI >
The engaging projection 84 provided on the first sliding hole portion 82 formed on the first engaging step 11a by performing the operation of pulling one of the lever members 96 and the second engaging step 11b, The first wire 92 is formed on the upper portion of the passage hole portion 97 so that the locking protrusion 184 provided in the second sliding groove portion 182 formed in the first sliding groove portion 182 can be simultaneously moved to the inside of the operating space portion 82a. A first guide roller 98a for supporting the bent portion of the first wire 92 so that the second wire 94 is bent in the downward direction is provided at the bottom of the passage hole portion 97, And a second guide roller (98b) for supporting the bent portion of the second wire (94) so as to be bent. delete delete

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