Live-line work doubling clamp

Abstract

The invention discloses a hot-line work doubling clamp, which belongs to the technical field of electric power facilities, and specifically comprises a main hook body, a movable hook, a bolt, a fixed ring, a self-locking assembly, a safety buckle and a locking piece, the main hook body comprises a main bearing body, a sliding groove is integrally formed in the bottom of the main bearing body, and a spring bin is integrally formed at the tail end of the sliding groove. The fixing ring is integrally formed on the outer side of the sliding groove. The locking piece is mounted on the fixing ring; the tail end of the movable hook is hinged to a connecting lug integrally connected with the top of the main bearing body. The self-locking assembly is slidably installed on the inner side of the sliding groove. The safety buckle is hinged to the spring bin. The device has double functions of self-locking and unlocking off-line, can completely utilize the insulating rod to carry out remote manual operation on the ground without assistance of large lifting instruments such as an insulating lifting cloud vehicle, can effectively improve the doubling and off-line operation efficiency, is higher in safety compared with the traditional doubling or off-line operation, and is more convenient to use. The use scenes of the doubling clamp can be more diversified, and the doubling clamp can be used in all-terrain scenes.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power facilities, and in particular relates to a live working line clamp. Background Art

[0002] At present, high-voltage live line paralleling operations are usually carried out manually with the help of an insulated ladder trolley, and the paralleling clamps used are mostly locked with bolts to lock the conductive core of the external cable with the conductive core of the main cable. The entire paralleling operation is time-consuming and labor-intensive, and the operators are in close contact with the high-voltage live cables, which poses certain safety hazards. If the external cables need to be powered off for maintenance in the later stage, they need to be manually disconnected with the help of an insulated ladder trolley, which is very inconvenient.

[0003] To this end, we propose a live working line clamp that is easy to operate and has both locking and unlocking functions. Summary of the Invention

[0004] In the current high-voltage live line-joining operations, the traditional line-joining clamp structure design requires operators to use an insulated aerial ladder trolley for close manual operation. This not only poses a safety hazard and the operation process is time-consuming and labor-intensive, but also because the insulated aerial ladder trolley needs to be used for climbing, the line-joining operation scenario is greatly limited, and it is impossible to operate in all terrains and small spaces.

[0005] The purpose of the present invention is to provide a live working line clamp to solve the above problems existing in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A live working line clamp comprises a main hook body, a movable hook, a latch, a fixing ring, a self-locking component, a safety buckle and a locking piece.

[0008] Specifically, the main hook body includes a main carrier, the bottom of the main carrier is integrally formed with a slide groove, the tail end of the slide groove is integrally formed with a spring compartment; and the fixing ring is integrally formed on the outside of the slide groove for connecting an external cable.

[0009] Furthermore, in order to ensure the stability of the connection between the external cable and the paralleling clamp and prevent the cable from loosening from the fixing ring, the locking member is installed on the fixing ring; the specific design of the locking member is as follows:

[0010] The locking part includes a locking bolt and a locking clamp, the locking bolt is screwed into the middle of the fixing ring, the cross-section of the locking clamp is arc-shaped, and the locking clamp is movably inserted into the inner side of the fixing ring along the length direction of the fixing ring, and the middle part of the back side of the locking clamp is rotatably matched with the end of the locking bolt. In the design of the entire locking part, the locking clamp is arranged on the inner side of the fixing ring, and the locking clamp is pushed forward by screwing the locking bolt, and finally the wire core of the external cable is firmly clamped and fixed to the inner side of the fixing ring. In order to further improve the clamping and anti-slip effect, anti-slip grooves can be provided on the inner sides of the locking clamp and the fixing ring to increase the friction between the wire core and the fixing ring and the locking clamp.

[0011] Furthermore, in order to make the wiring clamp have a quick wire-untying function, the part used to connect with the main cable is designed for a movable assembly, specifically: the tail end of the movable hook is hinged to the connecting ear that is integrally connected to the top of the main carrier, and pin holes that cooperate with the pin are provided near the tail end of the movable hook and in the middle of the connecting ear. When the movable hook is in a locked state, the movable hook is horizontally arranged, and the pin holes on the movable hook and the connecting ear coincide with each other, and the pin is inserted into the pin holes on the movable hook and the connection to position and fix the movable hook.

[0012] Furthermore, in order to realize the self-locking wire clamping function of the parallel wire clamp, the self-locking component is slidably installed on the inner side of the slide groove; at the same time, in order to cooperate with the self-locking component to realize the automatic clamping and locking of the cable core, several vertical positioning grooves are opened in the middle of the main carrier, and a horizontal limiting groove is opened at the relative position on both sides of the slide groove.

[0013] The structural design of the self-locking component and the assembly linkage design between the self-locking component and the main carrier are as follows:

[0014] Furthermore, the self-locking assembly includes a pushing wedge, a clamping block and a spring, and the pushing wedge includes a bottom bracket, a wedge and an auxiliary positioning column; specifically, the bottom bracket is slidably assembled at the bottom of the slide groove, and the wedge adopts a triangular design and is vertically integrated at the top of the bottom bracket, and the auxiliary positioning column is horizontally integrated at the tail end of the wedge along the length direction of the slide groove, and the end of the auxiliary positioning column passes through the spring compartment and extends to the outside of the spring compartment. In order to facilitate the staff to position the initial position of the pushing wedge during the line paralleling operation, the clamping block can always remain in a relaxed state before the line paralleling clamping and fixing operation is implemented, so that the line paralleling clamp can be hung on the main cable conveniently. A limit pin is laterally fixed at one end of the auxiliary positioning column close to the wedge block, wherein, in order to prevent the wedge block from leaving the sliding groove range, the two ends of the limit pin are slidably engaged in the transverse limit through groove, and the two ends of the limit pin are extended to the outside of the sliding groove, so as to facilitate the cooperation between the limit pin and the safety buckle. In order to realize the self-locking of the parallel wiring clamp, the spring is sleeved on the outside of the auxiliary positioning column, and the two ends of the spring are respectively in conflict with the inner wall of the spring magazine and the limit pin. At the same time, the inner walls on both sides of the safety buckle are hinged to the two sides of the spring magazine, and further, the safety buckle includes a U-shaped pull ring hinged to the spring magazine on the inner side, and the front ends of both sides of the U-shaped pull ring are integrally formed with hooks.

[0015] Furthermore, in order to enable the clamping block to cooperate with the pushing wedge block to automatically clamp the main cable, the clamping block includes a horizontally arranged wire clamping groove, and the top of the wire clamping groove is designed as an arc-shaped groove to facilitate the wire clamping groove to fit the surface of the main cable. In order to improve the stability of the wire clamping connection and prevent the parallel wire clamp from sliding, anti-slip teeth are also integrally formed in the groove of the wire clamping groove, and the bottom of the wire clamping groove is integrally formed with a wedge-shaped bottom plate that slides with the wedge block, and support ribs are integrally formed between the wedge-shaped bottom plate and the wire clamping groove; a positioning pile is horizontally fixed on the side of the wire clamping groove corresponding to the position of the vertical positioning through-groove, and the end of the positioning pile is integrally formed with an end cap after passing through the vertical positioning through-groove.

[0016] Furthermore, in order to improve the structural strength of the line clamp, reinforcing ribs are integrally formed at the middle position of the top of the movable hook and at the position where the outer side of the middle part of the fixed ring is connected to the sliding groove.

[0017] Furthermore, in order to facilitate the later maintenance of the parallel node position, the latch is composed of a metal rod and a pull ring.

[0018] Furthermore, in order to realize the self-locking function of the parallel wire clamp in the process of clamping the main conductive cable and prevent accidental loosening, a limiting slide groove is integrally formed at the bottom of the slide groove, and a non-return locking block is fixed at the position of the limiting slide groove at the bottom of the slide groove away from the spring compartment, and a limiting block that slides with the limiting slide groove is integrally formed at the bottom of the base, and the bottom of the limiting block is integrally formed with tooth grooves distributed side by side.

[0019] Furthermore, since the high-voltage transmission cable is located higher than the ground, in order to facilitate the staff to quickly hang the line clamp on the main conductive cable, the part of the movable hook near the tail end adopts an arc-shaped design, and the front end of the movable hook extends to the outside of the bottom slide groove of the main carrier.

[0020] Beneficial effects:

[0021] In the present invention, the main hook body is used as the installation carrier, and the fixing ring, locking part and self-locking component designed on the main hook body are coordinated with the movable hook hinged on the main hook body and the pin for limiting the free rotation of the movable hook. The entire line-pulling clamp can be coordinated with the structures of various parts, and at the same time has the dual functions of self-locking and unlocking the line. Moreover, the structural design of the entire line-pulling clamp does not require the assistance of large-scale lifting equipment such as insulated lifting cloud vehicles, and can be fully operated remotely manually on the ground using insulating rods, which can effectively improve the efficiency of line-pulling and line-untying operations. During the entire operation, the operators are away from live cables, which is safer than traditional line-pulling or line-untying operations. Moreover, there is no need to rely on lifting equipment when performing line-pulling or line-untying operations using this line-pulling clamp, which can make the use scenarios of the line-pulling clamp more diverse and can be used in all-terrain scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the present invention when in use;

[0023] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0024] Figure 3 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 4 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 5 The structure of the present invention after decomposition is shown in FIG. Figure 1 ;

[0027] Figure 6 The structure of the present invention after decomposition is shown in FIG. Figure 2 .

[0028] In the figure: 1. main hook body; 101. main bearing body; 102. connecting ear; 103. pin hole; 104. slide groove; 105. spring compartment; 106. vertical positioning through groove; 107. horizontal limiting through groove; 108. limiting slide groove; 109. non-return lock block; 2. movable hook; 3. latch; 4. self-locking assembly; 401. pushing wedge block; 411. bottom support; 412. wedge block; 413. auxiliary positioning column; 414. limiting pin; 415. tooth groove; 402. clamping block; 421. wire clamping groove; 422. positioning pile; 423. supporting rib; 424. wedge bottom plate; 403. spring; 5. safety buckle; 501. U-shaped pull ring; 502. hook; 6. fixing ring; 7. locking piece; 701. locking bolt; 702. locking splint. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in conjunction with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0030] Example:

[0031] In the current high-voltage live-line paralleling operation, the traditional paralleling clamp structure design requires operators to use an insulated aerial ladder trolley for close manual operation. This not only poses a safety hazard and is time-consuming and labor-intensive, but also requires the use of an insulated aerial ladder trolley to climb to a height, which greatly limits the paralleling operation scenarios and makes it impossible to operate in all terrains or small spaces. We propose a live-line paralleling clamp that is easy to operate and has both locking and unlocking functions. The specific design solution is as follows:

[0032] like Figure 1 As shown, this embodiment provides a live working line clamp, including a main hook body 1, a movable hook 2, a latch 3, a fixing ring 6, a self-locking component 4, a safety buckle 5 and a locking member 7.

[0033] Specifically, such as Figure 1-4 As shown, the main hook body 1 includes a main carrier 101, the bottom of the main carrier 101 is integrally formed with a slide groove 104, the tail end of the slide groove 104 is integrally formed with a spring compartment 105; and the fixing ring 6 is integrally formed on the outside of the slide groove 104 for connecting an external cable.

[0034] In order to ensure the stability of the connection between the external cable and the paralleling clamp and prevent the cable from loosening from the fixing ring 6, a locking member 7 is installed on the fixing ring 6; the specific design of the locking member 7 is as follows:

[0035] like Figure 5-6 When the bolt 701 is unlocked, the latch will be locked and the lock will be locked.

[0036] like Figure 5-6 As shown, in order to make the line clamp have a quick line unwinding function, the part used to connect with the main cable is designed for movable assembly, specifically: the tail end of the movable hook 2 is hinged to the connecting ear 102 integrally connected to the top of the main carrier 101, and pin holes 103 for cooperating with the pin 3 are provided near the tail end of the movable hook 2 and in the middle of the connecting ear 102. When the movable hook 2 is in a locked state, the movable hook 2 is horizontally arranged, and the pin holes 103 on the movable hook 2 and the connecting ear 102 coincide with each other, and the pin 3 is inserted into the pin holes 103 on the movable hook 2 and the connection to position and fix the movable hook 2.

[0037] like Figure 5-6 As shown, in order to realize the self-locking clamping function of the parallel wire clamp, its self-locking component 4 is slidably installed on the inner side of the slide groove 104; at the same time, in order to cooperate with the self-locking component 4 to realize the automatic clamping and locking of the cable core, several vertical positioning grooves 106 are opened in the middle of the main carrier 101, and a horizontal limiting groove 107 is opened at the relative position on both sides of the slide groove 104.

[0038] The structural design of the self-locking component 4 and the assembly linkage design between the self-locking component 4 and the main carrier 101 are as follows:

[0039] like Figure 5-6As shown, the self-locking assembly 4 includes a pushing wedge 401, a clamping block 402 and a spring 403, and the pushing wedge 401 includes a base 411, a wedge 412 and an auxiliary positioning column 413; specifically, the base 411 is slidably assembled at the bottom of the slide 104, and the wedge 412 adopts a triangular design and is vertically integrated at the top of the base 411, and the auxiliary positioning column 413 is horizontally integrated at the tail end of the wedge 412 along the length direction of the slide 104, and the end of the auxiliary positioning column 413 passes through the spring compartment 105 and extends to the outside of the spring compartment 105. In order to facilitate the staff to position the initial position of the pushing wedge 401 during the line paralleling operation, the clamping block 402 can always remain in a relaxed state before the line paralleling clamping and fixing operation is implemented, which is convenient for hanging the line paralleling clamp on the main cable. The auxiliary positioning column 413 is horizontally fixed with a limit pin 414 at one end near the wedge block 412. In order to prevent the wedge block 412 from leaving the range of the slide slot 104, the two ends of the limit pin 414 are slidably engaged in the horizontal limit through groove 107, and the two ends of the limit pin 414 are extended to the outside of the slide slot 104, so as to facilitate the cooperation between the limit pin 414 and the safety buckle 5. In order to realize the self-locking of the parallel wiring clamp, the spring 403 is sleeved on the outside of the auxiliary positioning column 413, and the two ends of the spring 403 also respectively contact the inner wall of the spring magazine 105 and the limit pin 414. At the same time, the inner walls on both sides of the safety buckle 5 are hinged to the two sides of the spring magazine 105, and further, the safety buckle 5 includes a U-shaped pull ring 501 hinged to the spring magazine 105 on the inside, and the front end of the U-shaped pull ring 501 on both sides of the one-piece hook 502.

[0040] Before implementing the line-joining operation, the staff can use tools to move the pushing wedge 401 toward the spring compartment 105 until the spring 403 is compressed, and the limit pin 414 moves to the end of the transverse limit groove 107 close to the spring compartment 105, and use the hook 502 at the front end of the safety buckle 5 to temporarily position the position of the limit pin 414.

[0041] In order to enable the clamping block 402 to cooperate with the pushing wedge block 401 to automatically clamp the main cable, the clamping block 402 includes a horizontally arranged wire clamping groove 421, and the top of the wire clamping groove 421 is designed as an arc groove so that the wire clamping groove 421 can fit the surface of the main cable. In order to improve the stability of the wire clamping connection and prevent the parallel wire clamp from sliding, anti-slip teeth are also integrally formed in the groove of the wire clamping groove 421, and the bottom of the wire clamping groove 421 is integrally formed with a wedge-shaped bottom plate 424 that slides with the wedge block 412, and a supporting rib 423 is integrally formed between the wedge-shaped bottom plate 424 and the wire clamping groove 421; the side of the wire clamping groove 421 corresponds to the vertical positioning groove The position 106 is horizontally fixed with a positioning pile 422, and the end of the positioning pile 422 is formed with an end cap after passing through the vertical positioning groove 106. The wire clamping groove 421 cooperates with the vertical positioning groove 106 through the positioning pile 422, so that the wire clamping groove 421 can only slide in the direction of the vertical positioning groove 106, and the sliding cooperation between the wedge bottom plate 424 and the wedge block 412 can enable the propulsion wedge block 401 to move under the action of the spring 403 after losing the restriction of the safety buckle 5, so that the clamping block 402 is forced to slide upward along the vertical positioning groove 106, and automatically clamp the conductive cable placed between the movable hook 2 and the clamping block 402.

[0042] It should be noted that the clamping force of the clamping block 402 and the movable hook 2 on the main conductive cable depends on the strength of the selected spring 403, and the specifications of the spring 403 need to be selected according to actual application requirements.

[0043] During the entire line-joining operation, after the staff installs the external wire into the fixed ring 6, they use the insulating rod to lift the line-joining clamp to the designated position of the main conductive cable, and hang the line-joining clamp on the main conductive cable through the movable hook 2. Finally, they pull down the safety buckle 5 through the insulating rod so that the hook 502 on the safety buckle 5 disengages from the limit pin 414, so that the pushing wedge block 401 moves under the push of the spring 403, so that the clamp block 402 moves up, and cooperates with the movable hook 2 to clamp the main conductive cable.

[0044] In order to improve the structural strength of the line clamp, reinforcing ribs are integrally formed at the top middle position of the movable hook 2 and at the position where the outer side of the middle part of the fixing ring 6 is connected to the sliding groove 104.

[0045] In order to facilitate the later maintenance of the parallel node position, the pin 3 is composed of a metal rod and a pull ring. When the parallel clamp needs to be untied, the operator only needs to use the insulating rod to pull the metal rod out of the pin hole 103 through the pull ring, so that the movable hook 2 loses its constraint and the parallel clamp can be untied. The whole operation is convenient and quick, and the untiing operation can be completed without the help of other climbing tools.

[0046] In order to realize the self-locking function of the wiring clamp in the process of clamping the main conductive cable and prevent accidental loosening, a limiting slide groove 108 is integrally formed at the bottom of the slide groove 104, and a non-return lock block 109 is fixed at the position corresponding to the limiting slide groove 108 at the bottom of the slide groove 104 away from the spring chamber 105, and a limiting block that slides with the limiting slide groove 108 is integrally formed at the bottom of the base 411, and the bottom of the limiting block is integrally formed with tooth grooves 415 distributed side by side.

[0047] Since the high-voltage transmission cable is located higher than the ground, in order to facilitate the staff to quickly hang the line clamp on the main conductive cable, the part of the movable hook 2 near the tail end adopts an arc design, and the front end of the movable hook 2 extends to the outside of the bottom slide groove 104 of the main carrier 101.

[0048] In the structural design of the entire line-pulling clamp, the main hook body 1 is used as the installation carrier, and the fixing ring 6, locking piece 7 and self-locking component 4 designed on the main hook body 1 are coordinated, and the movable hook 2 hinged on the main hook body 1 and the pin 3 for limiting the free rotation of the movable hook 2 are combined. The entire line-pulling clamp can be coordinated with the structures of various parts, and at the same time has the dual functions of self-locking and unlocking. Moreover, the structural design of the entire line-pulling clamp does not require the assistance of large-scale lifting equipment such as insulated lifting vehicles, and can be fully operated remotely manually on the ground using insulating rods, which can effectively improve the efficiency of line-pulling and line-untying operations. During the entire operation, the operators stay away from live cables, which is safer than traditional line-pulling or line-untying operations. Moreover, the line-pulling clamp does not need to rely on lifting equipment during line-pulling or line-untying operations, which can make the use scenarios of the line-pulling clamp more diverse and can be used in all-terrain scenarios.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A live working line clamp, characterized in that: It comprises a main hook body (1), a movable hook (2), a latch (3), a fixing ring (6), a self-locking component (4), a safety buckle (5) and a locking member (7); The main hook body (1) comprises a main carrier (101), a slide groove (104) is integrally formed at the bottom of the main carrier (101), and a spring compartment (105) is integrally formed at the tail end of the slide groove (104); The fixing ring (6) is integrally formed on the outer side of the sliding groove (104); The locking member (7) is mounted on the fixing ring (6); The tail end of the movable hook (2) is hinged to a connecting ear (102) integrally connected to the top of the main carrier (101), and a pin hole (103) for cooperating with the latch (3) is provided near the tail end of the movable hook (2) and in the middle of the connecting ear (102); The self-locking component (4) is slidably mounted on the inner side of the sliding groove (104); The inner walls on both sides of the safety buckle (5) are hinged to the two sides of the spring compartment (105).

2. A live working line clamp according to claim 1, characterized in that: A reinforcing rib is integrally formed at the top middle position of the movable hook (2) and at the position where the outer side of the middle portion of the fixing ring (6) is connected to the sliding groove (104); The latch (3) is composed of a metal rod and a pull ring.

3. The live working line clamp according to claim 1, characterized in that: A plurality of vertical positioning grooves (106) are provided in the middle of the main carrier (101), and a horizontal limiting groove (107) is provided at the relative positions on both sides of the slide groove (104).

4. The live working line clamp according to claim 1, characterized in that: The self-locking assembly (4) includes a propulsion wedge (401), a clamping block (402) and a spring (403); the propulsion wedge (401) includes a base (411), a wedge (412) and an auxiliary positioning column (413); The base (411) is slidably assembled at the bottom of the slide groove (104), the wedge block (412) is triangular in design and vertically integrated at the top of the base (411), the auxiliary positioning column (413) is horizontally integrated at the tail end of the wedge block (412) along the length direction of the slide groove (104), the end of the auxiliary positioning column (413) passes through the spring bin (105), and the auxiliary positioning column (413) is laterally fixed with a limit pin (414) at one end close to the wedge block (412), and the two ends of the limit pin (414) are slidably engaged in the transverse limit groove (107), the spring (403) is sleeved on the outside of the auxiliary positioning column (413), and the two ends of the spring (403) respectively conflict with the inner wall of the spring bin (105) and the limit pin (414), and the two ends of the limit pin (414) extend to the outside of the slide groove (104).

5. The live working line clamp according to claim 4, characterized in that: The clamping block (402) includes a horizontally arranged wire clamping groove (421), the bottom of the wire clamping groove (421) is integrally formed with a wedge-surface bottom plate (424) that slides with the wedge block (412), and a supporting rib (423) is integrally formed between the wedge-surface bottom plate (424) and the wire clamping groove (421); a positioning pile (422) is horizontally fixed on the side of the wire clamping groove (421) at a position corresponding to the vertical positioning through-groove (106), and an end cap is integrally formed after the end of the positioning pile (422) passes through the vertical positioning through-groove (106).

6. The live working line clamp according to claim 1, characterized in that: The bottom of the slide groove (104) is integrally formed with a limiting slide groove (108), and a non-return locking block (109) is fixed at a position corresponding to the limiting slide groove (108) at the bottom of the slide groove (104) away from one end of the spring compartment (105).

7. The live working line clamp according to claim 4, characterized in that: The bottom of the base (411) is integrally formed with a limiting block that slidably cooperates with the limiting sliding groove (108), and the bottom of the limiting block is integrally formed with tooth grooves (415) distributed side by side.

8. The live working line clamp according to claim 1, characterized in that: The safety buckle (5) comprises a U-shaped pull ring (501) hinged to the spring chamber (105) on the inner side, and hooks (502) integrally formed at the front ends of both sides of the U-shaped pull ring (501).

9. The live working line clamp according to claim 1, characterized in that: The locking member (7) includes a locking bolt (701) and a locking clamp (702), wherein the locking bolt (701) is screwed into the middle of the fixing ring (6), and the locking clamp (702) is designed with an arc-shaped cross section and is movably inserted into the inner side of the fixing ring (6), and the middle of the back side of the locking clamp (702) is rotatably matched with the end of the locking bolt (701).

10. The live working line clamp according to claim 2, characterized in that: The portion of the movable hook (2) near the tail end is designed to be arc-shaped, and the front end of the movable hook (2) extends to the outside of the bottom sliding groove (104) of the main carrier (101).

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