Track anti-slip device

Abstract

The present invention relates to a track anti-slip device, comprising a track and an anti-slip device arranged on one side of the track; the anti-slip device comprises a telescopic cylinder, a telescopic rod, a rack, a gear, a transmission shaft and a stopper; the telescopic cylinder is arranged on one side of the track, the telescopic rod passes through the telescopic cylinder and can perform telescopic movement relative to the telescopic cylinder, and a rack is arranged at one end of the telescopic rod; a rotating shaft is arranged perpendicular to the telescopic rod, a gear is arranged on the rotating shaft, the gear is meshed with the rack, a stopper is arranged on the rotating shaft, and the stopper can swing on one side of the track with the rotation of the rotating shaft. When the baffle in the anti-slip device swings to the upper side of one side of the track, it can prevent the coal carriage on the track from slipping on the track, thereby ensuring transportation safety.

Description

Technical Field

[0001] The invention relates to the technical field of rail transportation, and in particular to a rail anti-slip device. Background Art

[0002] Currently, rail transportation is a common mode of transportation in the process of coal transportation in power plants. Coal carriages running on rails usually use their own brake systems to limit the rotation of their wheels to prevent them from moving on the rails. However, when the brake system fails or the rails are slippery, the coal carriages may slip or slide on the rails, posing a safety hazard. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a track anti-slip device, which prevents coal carriages on the track from slipping and ensures transportation safety by arranging the anti-slip device on one side of the track.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The track anti-slip device comprises a track and an anti-slip device arranged on one side of the track; the anti-slip device comprises a telescopic cylinder, a telescopic rod, a rack, a gear, a transmission shaft and a stopper; the telescopic cylinder is arranged on one side of the track, the telescopic rod passes through the telescopic cylinder and can perform telescopic movement relative to the telescopic cylinder, and a rack is arranged at one end of the telescopic rod; a rotating shaft is arranged perpendicular to the telescopic rod, a gear is arranged on the rotating shaft, the gear is meshed with the rack, a stopper is arranged on the rotating shaft, and the stopper can swing on one side of the track as the rotating shaft rotates.

[0006] Furthermore, a limit assembly for limiting the travel of the telescopic rod is provided in the telescopic cylinder, and the limit assembly includes a limit block and a return spring; the limit block is provided on the telescopic rod, and the return spring is sleeved on the telescopic rod, one end of the return spring presses against the limit block, and the other end presses against the rear end inner wall of the telescopic cylinder.

[0007] Furthermore, the rack is fixedly mounted on the telescopic rod via a fixing block, and the rack and the fixing block are integrally formed.

[0008] Furthermore, the telescopic cylinder is fixed on the ground through a base, and the rotating shaft is located below the telescopic rod and is rotatably arranged on the ground through a fixing seat.

[0009] Furthermore, the stoppers are arranged at both ends of the rotating shaft, the stoppers are located on the inner side or the outer side of the track, and a guide groove is provided on one side of the track close to the stoppers, and the guide groove matches the stoppers.

[0010] Furthermore, the stopper includes a baffle and a stop block, the baffle is located on one side of the track, one end of the baffle is arranged on the rotating shaft, the other end of the baffle is fixedly connected to the stop block, and the stop block is located between the track and the baffle.

[0011] Furthermore, a roller is provided at the front end of the telescopic rod, and the roller is fixed to the lug at the front end of the telescopic rod through a pin.

[0012] Furthermore, a first buffer spring is provided between the fixed block and the telescopic cylinder, and the first buffer spring is sleeved on the telescopic rod.

[0013] Furthermore, a second buffer spring is provided at one end of the fixing block away from the first buffer spring, and the second buffer spring is fixed to the telescopic rod through a nut.

[0014] Furthermore, one end of the telescopic rod away from the rack can extend out of the longitudinal edge of the track, a transport device is provided on the outer side of the longitudinal edge of the track, and a slide is provided on the side of the transport device close to the telescopic rod, and the slide is adapted to the telescopic rod.

[0015] Furthermore, the slideway includes a guiding section and a retaining section, the retaining section is arranged perpendicular to the axial direction of the telescopic rod, one end of the guiding section is connected to the retaining section, and the other end is arranged away from the axial direction of the telescopic rod.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] The track anti-slip device provided by the present application comprises a track and an anti-slip device arranged on one side of the track; the anti-slip device comprises a telescopic cylinder, a telescopic rod, a rack, a gear, a transmission shaft and a stopper; the telescopic cylinder is arranged on one side of the track, the telescopic rod passes through the telescopic cylinder and can perform telescopic movement relative to the telescopic cylinder, and a rack is arranged at one end of the telescopic rod; the rotating shaft is arranged perpendicular to the telescopic rod, a gear is arranged on the rotating shaft, the gear is meshed with the rack, a stopper is arranged on the rotating shaft, and the stopper can swing on one side of the track with the rotation of the rotating shaft. When the baffle in the anti-slip device swings to the top of one side of the track, it can prevent the coal carriage on the track from slipping on the track, thereby ensuring transportation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a top view of the structure of an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of a top view of the structure of an embodiment of the present invention;

[0020] Figure 3 for Figure 2 Schematic diagram of the structure in the middle AA direction;

[0021] Figure 4It is a schematic diagram of the main structure of an embodiment of the present invention;

[0022] Figure 5 It is a side view structural schematic diagram of an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the top view of the structure of an embodiment of the present invention.

[0024] In the figure: 1, track, 2, telescopic cylinder, 3, telescopic rod, 4, rack, 5, gear, 6, rotating shaft, 7, baffle, 8, base, 9, reset spring, 10, limit block, 11, fixed block, 12, fixed seat, 13, block, 14, guide groove, 15, roller, 16, pin shaft, 17, lug, 18, track pad, 19, first buffer spring, 20, second buffer spring, 21, sliding sleeve, 22, nut, 23, transportation device, 24, slideway, 24.1, guide section, 24.2, holding section, 25, ground. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Example 1

[0027] like Figure 1-5 As shown, the track anti-slip device is used to prevent the coal carriage on the track 1 from slipping, including the track 1 and the anti-slip device arranged on one side of the track 1; the anti-slip device includes a telescopic cylinder 2, a telescopic rod 3, a rack 4, a gear 5, a rotating shaft 6 and a stopper; the track 1 is two, and the two tracks 1 are fixed on the ground 25 by a plurality of track pads 18, and the plurality of track pads 18 are arranged at intervals, and the track pads 18 make the track 1 higher than the ground 25; the telescopic cylinder 2 is arranged on the inner side of the two tracks 1, and the telescopic cylinder 2 is fixed on the ground 25 by a base 8, and the telescopic cylinder 2 is a rectangular parallelepiped or a cylinder provided with a cavity. The telescopic cylinder 2 in this embodiment is a rectangular parallelepiped provided with a cavity, and the telescopic cylinder 2 is detachably provided with an upper end cover, and the upper end cover is used for disassembly and maintenance of the telescopic rod 3;

[0028] It should be noted that the telescopic cylinder 2 is fixedly arranged on the ground 25 via the fixing seat 12 , which, on the one hand, provides a supporting fulcrum for the telescopic rod 3 , and on the other hand, can guide the movement direction of the telescopic rod 3 , thus playing a guiding role.

[0029] The telescopic rod 3 is arranged parallel to the longitudinal direction of the track 1, the telescopic rod 3 passes through the two ends of the telescopic cylinder 2, and can perform reciprocating telescopic motion relative to the telescopic cylinder 2 along the axial direction of the telescopic cylinder 2 in the telescopic cylinder 2. The telescopic rod 3 in this embodiment is arranged along the length direction of the telescopic cylinder 2, and the telescopic rod 3 is inserted into the through holes on the corresponding two end surfaces of the telescopic cylinder 2.

[0030] One end of the telescopic rod 3 of this embodiment extends out of the longitudinal edge of the track 1, and the other end of the telescopic rod 3 passes through the telescopic cylinder 2 and is fixedly provided with a fixing block 11, and the rack 4 is fixedly provided on the lower surface of the fixing block 11. The rack 4 and the fixing block 11 in this embodiment are integrally formed, and the fixing block 11 is threadedly connected to the telescopic rod 3. An internal thread hole is provided on the fixing block 11, and an external thread matching the internal thread hole is provided on the telescopic rod 3. It should be noted that the fixing block 11 can also be welded to the telescopic rod 3.

[0031] The rotating shaft 6 is arranged perpendicular to the telescopic rod 3 and is located below the telescopic rod 3. The rotating shaft 6 in this embodiment passes through the gap between the track pads 18 and extends out of the track 1. The rotating shaft 6 is rotatably fixed on the ground 25 through two fixed seats 12. A gear 5 is fixed on the rotating shaft 6. The gear 5 is located between the two fixed seats 12, and the gear 5 is meshed with the rack 4.

[0032] Stoppers are fixedly provided at both ends of the rotating shaft 6. The two stoppers are symmetrically arranged on the rotating shaft 6. The two stoppers are respectively located on the outsides of the two tracks 1. The two stoppers swing as the rotating shaft 6 rotates. The end of the stopper away from the rotating shaft 6 can swing to the top of one side of the track 1. The stopper can be a plate-like structure or a columnar structure, or other frame structures that can achieve the blocking function. In order to better achieve the blocking function of the stopper, a guide groove 14 is provided on the outer side of the track 1. The guide groove 14 matches the stopper, and the stopper can swing in the guide groove 14. On the one hand, the guide groove 14 guides the stopper to swing in its groove so that the stopper can swing to the top of one side of the track. On the other hand, it can also limit the swing angle of the stopper to prevent the stopper from swinging in the opposite direction.

[0033] The stopper described in this embodiment is a baffle plate 7 of a plate-like structure, one end of which is fixedly connected to the rotating shaft 6 , and the other end of which can swing along the guide groove 14 to the upper side of the outer side of the track 1 .

[0034] In order to enable the baffle 7 to better prevent the wheel from moving on the track 1, a block 13 is provided at the upper end of the baffle 7. The block 13 is a cylinder. The block 13 is located between the baffle 7 and the track 1 and extends toward the inside of the track 1. The block 13 swings in the guide groove 14.

[0035] The setting of the block 13 and the guide groove 14 can make the block 13 swing to the top of the track 1. When the block 13 is located above the track 1, the contact area between the baffle 7 and the wheels on the track 1 can be increased, thereby better preventing the carriage from slipping.

[0036] The above technical solution provides an anti-slip device on one side of the track 1. When the baffle 7 in the anti-slip device swings to the upper side of the track 1, it can prevent the coal carriage on the track 1 from slipping on the track 1. Figure 2 As described above, when there is no external force, the upper ends of the two baffles 7 are located above the outer side of the track 1. At this time, the baffles 7 can prevent the wheels of the coal carriage on the track 1 from moving on the track 1. When the coal carriage needs to move on the track 1, the external force pushes the front end of the telescopic rod 3 to make it retract toward the telescopic cylinder 2, and the rotating shaft 6 is driven to rotate through the rack 4 and the gear 5, and the rotating shaft 6 drives the baffle 7 to swing to the lower side of the upper end surface of the track 1.

[0037] A limit assembly for limiting the travel of the telescopic rod 3 is provided in the telescopic cylinder 2. The limit assembly includes a limit block 10 and a reset spring 9; the limit block 10 is located in the housing of the telescopic cylinder 2, and the limit block 10 is fixedly arranged on the telescopic rod 3; the limit block 10 in this embodiment is fixed on the telescopic rod 3 by a threaded connection, and the threaded connection between the limit block 10 and the telescopic rod 3 facilitates the disassembly and installation of the limit block 10. It should be noted that the limit block 10 can also be fixed on the telescopic rod 3 by welding. The reset spring 9 is provided in the housing of the telescopic cylinder 2, and the reset spring 9 is sleeved on the telescopic rod 3, one end of which is against the limit block 10, and the other end is against the inner wall of the rear end of the telescopic cylinder 2. In this embodiment, the reciprocating travel of the telescopic rod 3 in the telescopic cylinder 2 can be limited according to actual working conditions.

[0038] It should be noted that the front end of the telescopic rod 3 described in this example is an end of the telescopic rod 3 that can extend out of the longitudinal edge of the track 1. The rear end of the telescopic cylinder 2 is an end of the telescopic cylinder 2 that is away from the front end of the telescopic rod 3, and the end of the telescopic cylinder 2 that is close to the front end of the telescopic rod 3 is the front end of the telescopic cylinder 2. The reset spring 9 in this embodiment is used to make the front end of the telescopic rod 3 away from the telescopic cylinder 2 and extend out of the longitudinal edge of the track 1. When in use, in the absence of external force, the reset spring 9 is in a released state, and the limit block 10 is pressed against the inner wall of the front end of the telescopic cylinder 2 by its own elastic force. When the front end of the telescopic rod 3 is subjected to the axial thrust and moves toward the telescopic cylinder 2, the limit block 10 compresses the reset spring 9, and the reset spring 9 is compressed and stores energy. When the axial thrust at the front end of the telescopic rod 3 disappears, the reset spring 9 begins to release its stored elastic potential energy, pushing the first limit block 10 to move toward the front end of the telescopic cylinder 2, thereby making the front end of the telescopic rod 3 away from the telescopic cylinder 2, and making the front end of the telescopic rod 3 extend out of the longitudinal edge of the track 1.

[0039] It should be noted that when the return spring 9 is in a released state, that is, when the front end of the telescopic rod 3 extends out of the longitudinal edge of the track 1, the upper ends of the two baffles 7 are located above the outer side of the track 1. At this time, the baffles 7 can prevent the wheels of the coal carriage on the track 1 from moving on the track 1.

[0040] A first buffer spring 19 is provided between the fixed block 11 and the telescopic cylinder 2. The first buffer spring 19 is sleeved on the telescopic rod 3. The elastic force of the first buffer spring 19 is less than the elastic force of the reset spring 9. The first buffer spring 19 is used to ensure that the telescopic rod 3 is in a stable reciprocating motion in the telescopic cylinder 2. At the same time, when the telescopic rod 3 is subjected to a reverse thrust from the coal carriage, the impact of the limit block 10 on the telescopic rod 3 on the inner wall of the front end of the telescopic cylinder 2 can be reduced. One end of the first buffer spring 19 in this example is fixedly connected to the fixed block 11, and the other end is fixedly connected to the sliding sleeve 21. The sliding sleeve 21 is slidably sleeved on the telescopic rod 3. When the first buffer spring 19 is in a released state, the distance between the sliding sleeve 21 and the limit block 10 is less than the length of the telescopic cylinder 2. That is, the maximum movable stroke of the sliding sleeve 21 on the telescopic rod 3 is less than the maximum movable stroke of the limit block 10 in the telescopic cylinder 2.

[0041] When in use, when the front end of the telescopic rod 3 is away from the telescopic cylinder 2 (that is, when the reset spring 9 is in a released state), the sliding sleeve 21 abuts against the outer side wall of the rear end of the telescopic cylinder 2. When the front end of the telescopic rod 3 is subjected to an external thrust, causing the front end of the telescopic rod 3 to approach the telescopic cylinder 2 (that is, when the reset spring 9 is in a compressed state), the sliding sleeve 21 is away from the rear end of the telescopic cylinder 2 for a distance.

[0042] The end of the fixed block 11 away from the first buffer spring 19 is provided with a second buffer spring 20, which is sleeved on the telescopic rod 3 and fixed to the telescopic rod 3 by a nut 22. The second buffer spring 20 is used to prevent the fixed block 11 from loosening. A gasket is provided between the nut 22 and the second buffer spring 20. The rear end of the telescopic rod 3 is provided with an external thread matching the nut 22.

[0043] In the process of transporting coal, in order to better cooperate with the use of the anti-slip device, the anti-slip device is set at a predetermined position on the longitudinal edge of the track 1, and the end of the telescopic rod 3 away from the rack 4 can extend out of the longitudinal edge of the track 1, that is, the front end of the telescopic rod 3 can perform telescopic movement relative to the longitudinal edge of the track 1, and a driving device capable of providing thrust for the telescopic rod 3 is set outside the front end of the telescopic rod 3, that is, outside the longitudinal edge of the track 1. The driving device in this embodiment is a transport device 23 set outside the longitudinal edge of the track 1, and the transport device 23 is a rail transport device 23. The track used by the transport device 23 is set vertically to the track 1 of the coal carriage, and the transport device 23 is provided with a track 1 matching the coal carriage. The transport device 23 is used to transport the coal carriage.

[0044] A slideway 24 is provided on one side of the transport device 23 close to the telescopic rod 3. The slideway 24 is adapted to the telescopic rod 3 and is used to provide thrust for the reciprocating telescopic motion of the telescopic rod 3 to ensure the telescopic motion of the telescopic rod 3. The slideway 24 includes a guiding section 24.1 and a retaining section 24.2. The retaining section 24.2 is arranged perpendicular to the axial direction of the telescopic rod 3 to limit the position of the front end of the telescopic rod 3 relative to the telescopic cylinder 2.

[0045] One end of the guide section 24.1 is connected to the retaining section 24.2, and the other end is axially arranged away from the telescopic rod 3. The guide section 24.1 is used to guide the front end of the telescopic rod 3 to move relative to the telescopic cylinder 2 and realize the smooth telescopic movement of the telescopic rod 3.

[0046] In this embodiment, guide sections 24.1 are respectively arranged at both ends of the retaining section 24.2. One end of the guide section 24.1 away from the retaining section 24.2 is axially arranged away from the telescopic rod 3. The length of the retaining section 24.2 is equal to the distance between the two rails 1.

[0047] In order to enable the telescopic rod 3 to smoothly realize the telescopic movement, the front end of the telescopic rod 3 is provided with a roller 15, and the roller 15 is fixed to the lug 17 at the front end of the telescopic rod 3 through a pin 16. The roller 15 on the telescopic rod 3 matches the slideway 24 and can roll in the slideway 24.

[0048] When using, Figure 1 As shown, the transport device 23 stops outside the front end of the telescopic rod 3, the slideway 24 on the transport device 23 presses the front end of the telescopic rod 3, the return spring 9 in the telescopic cylinder 2 is in a compressed energy storage state, and the upper end of the baffle 7 is lower than the upper end surface of the track 1. At this time, the coal carriage can run on the track 1;

[0049] The pusher pushes the multiple coal carriages to the designated position, and pushes the frontmost coal carriage to the transport device 23, while the remaining coal carriages remain on the track 1;

[0050] like Figure 2 As shown, when the transport device 23 leaves, the front end of the telescopic rod 3 loses thrust and extends outward under the action of the return spring 9, and the meshing of the rack 4 and the gear 5 drives the rotating shaft 6 to rotate, thereby driving the baffle 7 to swing, and the front end of the baffle 7 is lifted, and the block 13 at the front end of the baffle 7 is higher than the upper end surface of the track 1. The block 13 can prevent the coal carriage from moving to the outside of the longitudinal edge of the track 1.

[0051] The above technical solution sets an anti-slip device at the longitudinal edge of the track 1, and prevents the coal carriage on the track 1 from slipping through the baffle 7 located on the outer side of the track 1. At the same time, when the coal carriage is transferred, the slide 24 on the transportation device 23 guides the telescopic rod 3 to make a reciprocating telescopic motion to realize the swing of the baffle 7, thereby realizing the movement and stopping of the coal carriage on the track 1.

[0052] Example 2

[0053] like Figure 5 As shown, the difference between Example 2 and Example 1 is that the rotating shaft 6 is arranged perpendicular to the telescopic rod 3 and is located between the two tracks 1. The rotating shaft 6 is rotatably fixed on the ground 25 through two fixing seats 12. A gear 5 is fixedly arranged on the rotating shaft 6. The gear 5 is located between the two fixing seats 12. The gear 5 and the rack 4 are meshed with each other. Baffles 7 are fixedly arranged at both ends of the rotating shaft 6. The two baffles 7 are symmetrically arranged on the rotating shaft 6. The two baffles 7 swing with the rotation of the rotating shaft 6. Specifically, the two baffles 7 are respectively arranged on the inner sides of the two tracks 1. The block 13 on the baffle 7 extends to the outer side of the track 1, and correspondingly, a guide groove 14 matching the block 13 is opened along the inner side of the track 1.

[0054] When in use, when the return spring 9 is in a released state, that is, when the front end of the telescopic rod 3 extends out of the longitudinal edge of the track 1, the upper ends of the two baffles 7 located on the inner side of the track 1 are located above the upper end surface of the track 1. At this time, the baffles 7 can prevent the wheels of the coal carriage on the track 1 from moving on the track 1.

[0055] Example 3

[0056] The difference between Example 3 and Example 1 is that the rack 4 and the fixed block 11 are integrally formed, and the fixed block 11 is sleeved on the telescopic rod 3. The telescopic rod 3 in this embodiment is provided with a stepped shaft, and the fixed block 11 is sleeved on the stepped shaft. The end of the fixed block 11 away from the first buffer spring 19 is provided with a second buffer spring 20, which is sleeved on the telescopic rod 3 and fixed to the telescopic rod 3 by a nut 22. The second buffer spring 20 is used to prevent the fixed block 11 from loosening. A gasket is provided between the nut 22 and the second buffer spring 20. The rear end of the telescopic rod 3 is provided with an external thread matching the nut 22.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Track anti-slip device, characterized by: It includes a track and an anti-slip device arranged on one side of the track; the anti-slip device includes a telescopic cylinder, a telescopic rod, a rack, a gear, a transmission shaft and a stopper; the telescopic cylinder is arranged on one side of the track, the telescopic rod passes through the telescopic cylinder, and can perform telescopic movement relative to the telescopic cylinder, and a rack is arranged at one end of the telescopic rod; a rotating shaft is arranged perpendicular to the telescopic rod, a gear is arranged on the rotating shaft, the gear is meshed with the rack, a stopper is arranged on the rotating shaft, and the stopper can swing on one side of the track with the rotation of the rotating shaft; an end of the telescopic rod away from the rack can extend out of the longitudinal edge of the track, a transport device is arranged on the outer side of the longitudinal edge of the track, a slide is arranged on the side of the transport device close to the telescopic rod, and the slide is adapted to the telescopic rod; the slide includes a guide section and a retaining section, the retaining section is arranged perpendicular to the axial direction of the telescopic rod, one end of the guide section is connected to the retaining section, and the other end is arranged away from the axial direction of the telescopic rod.

2. The track anti-slip device according to claim 1, characterized in that: A limit assembly for limiting the travel of the telescopic rod is arranged in the telescopic cylinder, and the limit assembly includes a limit block and a return spring; the limit block is arranged on the telescopic rod, and the return spring is sleeved on the telescopic rod, one end of the return spring presses on the limit block, and the other end presses on the rear end inner wall of the telescopic cylinder.

3. The track anti-slip device according to claim 1, characterized in that: The rack is fixedly mounted on the telescopic rod via a fixing block, and the rack and the fixing block are integrally formed.

4. The track anti-slip device according to claim 1, characterized in that: The telescopic cylinder is fixed on the ground through a base, and the rotating shaft is located below the telescopic rod and is rotatably arranged on the ground through a fixing seat.

5. The track anti-slip device according to claim 1, characterized in that: The stoppers are arranged at both ends of the rotating shaft, and the stoppers are located at the inner side or the outer side of the track. A guide groove is provided on one side of the track close to the stoppers, and the guide groove matches the stoppers.

6. The track anti-slip device according to claim 5, characterized in that: The stopper comprises a baffle and a stopper, wherein the baffle is located at one side of the track, one end of the baffle is arranged on the rotating shaft, and the other end of the baffle is fixedly connected to the stopper, and the stopper is located between the track and the baffle.

7. The track anti-slip device according to claim 1, characterized in that: The front end of the telescopic rod is provided with a roller, and the roller is fixed on the lug at the front end of the telescopic rod through a pin shaft.

8. The track anti-slip device according to claim 3, characterized in that: A first buffer spring is arranged between the fixed block and the telescopic cylinder, and the first buffer spring is sleeved on the telescopic rod.

Images