Supporting net rack conveying device

Abstract

The application relates to a supporting net rack conveying device which comprises a trolley, a net rack conveying mechanism, a lifting assembly and an anchor rod machine, the lifting assembly and the anchor rod machine are fixedly installed on the trolley, the net rack conveying mechanism is installed on the driving end of the lifting assembly, the lifting assembly can drive the net rack conveying mechanism to lift, the net rack conveying mechanism has an initial position and an end position, the net rack conveying mechanism can carry the supporting net rack and convey the supporting net rack from the initial position to the end position, the anchor rod machine is located on the side of the end position of the net rack conveying assembly, and the anchor rod machine is used for fixing the supporting net rack on the tunnel top wall. The supporting net rack conveying device can realize automatic conveying, installation and fixing of the supporting net rack during use, can reduce the labor intensity of workers, and can improve the construction efficiency of the supporting net rack.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mining support, in particular to a support net rack conveying device. BACKGROUND

[0002] Coal is an important mineral resource, and fuel made from coal is used for heating and power generation. Coal mining is usually divided into open-pit mining and underground mining. Open-pit mining mainly involves mining coal that is relatively close to the ground surface, while underground mining involves excavating a mine pit and supporting the inside of the tunnel. In the prior art, a support net rack is usually used to support the top wall of the tunnel. The support net rack is adapted to fit on the top wall of the tunnel and is then fixed and installed on the top wall of the tunnel by anchor rods. During construction, the support net rack is manually carried to the top wall of the tunnel that needs to be supported, and then an anchor rod machine is used to rivet anchor rods on the top wall of the tunnel to fix the support net rack on the top wall of the tunnel. The problem with the above prior art is that manually carrying the support net rack is time-consuming and labor-intensive, and the labor intensity of workers is high, and the construction efficiency of the support net rack is low. SUMMARY

[0003] In order to improve the technical problem of low construction efficiency of the support net rack in the prior art, the present application provides a support net rack conveying device.

[0004] The support net rack conveying device provided by the present application adopts the following technical solution:

[0005] A support net rack conveying device, comprising a trolley, a net rack conveying mechanism, a lifting assembly, and an anchor rod machine, the lifting assembly and the anchor rod machine being fixedly installed on the trolley, the net rack conveying mechanism being installed on the driving end of the lifting assembly, the lifting assembly being capable of driving the net rack conveying mechanism to lift, the net rack conveying mechanism having an initial position and an end position, the net rack conveying mechanism being capable of carrying the support net rack and conveying the support net rack from the initial position to the end position, the anchor rod machine being located on the side of the end position of the net rack conveying assembly, and the anchor rod machine being used to fix the support net rack on the top wall of the tunnel.

[0006] By adopting the above technical solution, when the support net rack conveying device of the present application is in use, the lifting assembly first drives the net rack conveying mechanism to lower down to facilitate the worker to place the support net rack on the net rack conveying mechanism, then the net rack conveying mechanism is lifted up, the net rack conveying mechanism conveys the support net rack from the initial position to the end position, then the anchor rod machine jacks up the support net rack to make the support net rack fit on the top wall of the tunnel, and then the anchor rod machine rivets and fixes the support net rack on the top wall of the tunnel, thereby realizing automatic conveying, installation, and fixation of the support net rack, reducing the labor intensity of the worker, and improving the construction efficiency of the support net rack.

[0007] Optionally, the net rack conveying mechanism comprises a conveying driving assembly and a bearing net rack, the bearing net rack is fixed at the driving end of the conveying driving assembly, the bearing net rack is used for supporting the supporting net rack, the bearing net rack is provided with a bearing net rack avoiding hole, and the bearing net rack avoiding hole is used for avoiding the anchor rod machine.

[0008] By adopting the above technical scheme, the bearing net rack can better support the supporting net rack, and the stability of the supporting net rack in transportation is improved.

[0009] Optionally, the conveying driving assembly comprises a winch, a sliding rail and a sliding block slidingly arranged on the sliding rail, a traction rope of the winch is connected with the sliding block to reciprocally move the sliding block on the sliding rail, the sliding rail is fixedly arranged at the driving end of the lifting assembly, and the bearing net rack is fixed on the sliding block.

[0010] By adopting the above technical scheme, the conveying driving assembly is simple in structure, convenient to set and capable of well meeting the driving requirement.

[0011] Optionally, the anchor rod machine is further provided with a temporary protection plate, the temporary protection plate is fixedly arranged at the end close to the terminal position of the sliding rail, the temporary protection plate is further provided with a protection plate avoiding hole corresponding to the position of the lower anchor rod machine, and the temporary protection plate is used for preventing the tunnel top wall collapse from destroying the device below.

[0012] By adopting the above technical scheme, the temporary protection plate can prevent the tunnel top wall collapse from destroying the device below.

[0013] Optionally, the lifting assembly comprises a hydraulic cylinder, a jacking column and a guide column, the hydraulic cylinder and the guide column are fixed on the trolley, the upper end surface of the guide column is provided with a vertically downward extending guide hole, the jacking column is vertically guided and movably arranged in the guide hole, the telescopic rod of the hydraulic cylinder is vertically upward arranged, the end portion of the telescopic rod is fixedly connected with the upper end of the jacking column, and the sliding rail is fixed at the upper end of the jacking column.

[0014] By adopting the above technical scheme, the lifting assembly is simple in structure, convenient to set and capable of well meeting the lifting requirement.

[0015] Optionally, the lower part of the temporary protection plate is further provided with a horizontal limiting assembly, the horizontal limiting assembly comprises a mounting plate, a sliding mounting strip and a telescopic limiting rod, the mounting plate is fixed at the bottom of the temporary protection plate in a horizontal state, the mounting plate is further provided with a mounting plate avoiding hole corresponding to the position of the lower anchor rod machine, the sliding mounting strip is provided with at least two parallel and spaced sliding mounting strips, each sliding mounting strip is guided and moved on the mounting plate, and the guiding and moving directions of each sliding mounting strip are the same, the mounting plate is further provided with a first locking member for locking and positioning the sliding mounting strip, the telescopic limiting rod is installed on the sliding mounting strip in a vertical state, the telescopic limiting rod can move along the length direction of the sliding mounting strip, at least two telescopic limiting rods are arranged on each sliding mounting strip, the sliding mounting strip is further provided with a second locking member for locking and positioning the telescopic limiting rod, and the telescopic limiting rod can be extended or shortened.

[0016] By adopting the above technical scheme, when the supporting net rack is conveyed to the terminal position, the worker extends the telescopic limiting rod and passes it through the mesh of the supporting net rack upwards, then moves the telescopic limiting rod so that the circumferential side surface of each telescopic limiting rod abuts against the periphery of the supporting net rack, then locks and positions the sliding mounting strip on the mounting plate through the first locking member and locks and positions the telescopic limiting rod on the sliding mounting strip through the second locking member, and each telescopic limiting rod cooperates with each other to realize the limiting of the horizontal direction of the supporting net rack, so that the supporting net rack can only move in the vertical direction and cannot move in the horizontal direction, thereby improving the fixing position precision of the supporting net rack.

[0017] Optionally, the first locking member is a screw, the opposite two side edges of the mounting plate are provided with a first guide sliding groove, the bottom of the sliding mounting strip is fixedly provided with a first guide sliding block, the first guide sliding block is guided and moved in the first guide sliding groove, the outer side groove wall of the first guide sliding groove is further provided with a first adjusting hole, the first adjusting hole extends along the length direction of the first guide sliding groove, the side of the first guide sliding block facing the first adjusting hole is provided with a first threaded hole, the rod part of the first locking member is screwed in the first threaded hole through the first adjusting hole, and the head part of the first locking member abuts against the mounting plate on the two sides of the first adjusting hole, and the first locking member can lock and position the sliding mounting strip on the mounting plate when it is tightened.

[0018] By adopting the above technical scheme, the first locking member is tightened when the sliding mounting strip is locked and positioned on the mounting plate, so that the head part of the first locking member is extruded on the mounting plate on the two sides of the first adjusting hole, and the positioning of the sliding mounting strip is realized through the extrusion force, and the first locking member is simple in structure, convenient to set and convenient to operate in positioning.

[0019] Optionally, the second locking member is a screw rod, the upper surface of the sliding installation strip is provided with a second guide sliding slot extending along the length direction thereof, the bottom of the telescopic limiting rod is fixedly provided with a second guide sliding block, the second guide sliding block is movably arranged in the second guide sliding slot, a second adjusting hole is further arranged in the side slot wall of the second guide sliding slot and extends along the length direction of the second guide sliding slot, a second screw hole is arranged in the side of the second guide sliding block facing the second adjusting hole, the rod part of the second locking member is screwed in the second screw hole through the second adjusting hole, the head part of the second locking member abuts against the sliding installation strip on the two sides of the second adjusting hole, and the second locking member can lock and position the telescopic limiting rod on the sliding installation strip when being screwed.

[0020] By adopting the above technical scheme, the second locking member is screwed when the telescopic limiting rod is locked and positioned on the sliding installation strip, the head part of the second locking member is pressed against the sliding installation strip on the two sides of the second adjusting hole, the telescopic limiting rod is positioned through the pressing force, and the structure is simple, convenient to set, and convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of a support net rack conveying device in an initial state of the embodiment 1 of the present application;

[0022] Figure 2 is a structural schematic view of a support net rack conveying device in a terminal state of the embodiment 1 of the present application;

[0023] Figure 3 is a structural schematic view of placing the support net rack in the initial position of the net rack conveying mechanism;

[0024] Figure 4 is a structural schematic view of conveying the support net rack to the terminal position by the net rack conveying mechanism;

[0025] Figure 5 is a structural schematic view of the support net rack conveying device of the embodiment 2 of the present application after hiding the bearing net rack;

[0026] Figure 6 is a structural schematic view of a horizontal limiting assembly;

[0027] Figure 7 is Figure 6 is an enlarged view of the structure at A in FIG. 6;

[0028] Figure 8 is a structural schematic view of the support net rack conveying device of the embodiment 2 of the present application in use.

[0029] Explanation of reference signs: 1, trolley; 2, conveying driving assembly; 21, winch; 22, sliding rail; 23, sliding block; 3, bearing net rack; 31, bearing net rack avoiding hole; 4, lifting assembly; 41, hydraulic cylinder; 411, telescopic rod; 42, jacking column; 43, guide column; 5, anchor rod machine; 6, temporary protective plate; 61, protective plate avoiding hole; 7, horizontal limiting assembly; 71, mounting plate; 711, mounting plate avoiding hole; 712, first guide sliding groove; 713, first adjusting hole; 72, sliding mounting strip; 721, second guide sliding groove; 722, second adjusting hole; 73, telescopic limiting rod; 74, first locking piece; 75, first guide sliding block; 76, second locking piece; 77, second guide sliding block; 8, support net rack. DETAILED DESCRIPTION

[0030] The application will be further described in detail below with reference to the accompanying drawings.

[0031] With reference to Figure 1 and Figure 2 , the embodiment 1 of the application discloses a support net rack conveying device, which comprises a trolley 1, a net rack conveying mechanism, a lifting assembly 4 and an anchor rod machine 5. The lifting assembly 4 and the anchor rod machine 5 are fixedly installed on the trolley 1, the net rack conveying mechanism is installed on the driving end of the lifting assembly 4, and the lifting assembly 4 can drive the net rack conveying mechanism to lift. The net rack conveying mechanism has an initial position and an end position, the initial position is a position at which the support net rack 8 is placed on the net rack conveying assembly, and the end position is the final position of the support net rack 8 conveyed by the net rack conveying mechanism. The net rack conveying mechanism can carry the support net rack 8 and convey the support net rack 8 from the initial position to the end position. The anchor rod machine 5 is located on the side of the end position of the net rack conveying assembly, and the anchor rod machine 5 is used for fixing the support net rack 8 on the tunnel top wall. The anchor rod machine 5 is a device commonly used for fixing the support net rack 8 during construction, and belongs to the prior art, so the structure and working principle thereof will not be described in detail.

[0032] With reference to Figure 1 and Figure 3 , the net rack conveying mechanism comprises a conveying driving assembly 2 and a bearing net rack 3, and the bearing net rack 3 is fixedly installed on the driving end of the conveying driving assembly 2. The bearing net rack 3 is used for supporting the support net rack 8, and the bearing net rack 3 is a curved surface structure which can be adapted to and fit the support net rack 8. The bearing net rack 3 is provided with a bearing net rack avoiding hole 31, and the bearing net rack avoiding hole 31 is used for avoiding the anchor rod machine 5. In this embodiment, the conveying driving assembly 2 comprises a winch 21, a sliding rail 22 and a sliding block 23 which is slidingly arranged on the sliding rail 22. The traction rope of the winch 21 is connected with the sliding block 23 to tractionally move the sliding block 23 on the sliding rail 22, the sliding rail 22 is fixedly arranged on the driving end of the lifting assembly 4, and the bearing net rack 3 is fixedly arranged on the sliding block 23.

[0033] With reference to Figure 1, the lifting assembly 4 comprises a hydraulic cylinder 41, a jacking column 42 and a guide column 43. The hydraulic cylinder 41 and the guide column 43 are fixed on the trolley 1. The upper end surface of the guide column 43 is provided with a guide hole extending vertically downward, and the jacking column 42 is movably inserted into the guide hole in the vertical direction. The telescopic rod 411 of the hydraulic cylinder 41 is arranged vertically upward, the end of the telescopic rod 411 is fixedly connected with the upper end of the jacking column 42, and the slide rail 22 is fixed to the upper end of the jacking column 42.

[0034] With reference to the drawings and Figure 1 , the upper side of the anchor rod machine 5 is further provided with a temporary protective plate 6, which is fixedly arranged at the end of the slide rail 22 close to the terminal position. The temporary protective plate 6 is of an arc surface structure, and the temporary protective plate 6 is further provided with a protective plate avoiding hole 61 corresponding to the position of the lower anchor rod machine 5. The temporary protective plate 6 is used to prevent the tunnel top wall from collapsing and destroying the device below. The lower side of the temporary protective plate 6 is also provided with a lifting assembly 4, and the jacking column 42 of the lifting assembly 4 below the temporary protective plate 6 is jacked and fixed to the bottom of the temporary protective plate 6.

[0035] With reference to the drawings and Figure 3 and Figure 4 , the implementation principle of the embodiment 1 of the application is that when the supporting net rack conveying device is used, the lifting assembly 4 first drives the net rack conveying mechanism to descend to facilitate workers to place the supporting net rack 8 on the net rack conveying mechanism, then the net rack conveying mechanism is raised, the net rack conveying mechanism conveys the supporting net rack 8 from the initial position to the terminal position, then the anchor rod machine 5 jacks up the supporting net rack 8 to make the supporting net rack 8 adhere to the tunnel top wall, then the anchor rod machine 5 rivets and fixes the supporting net rack 8 to the tunnel top wall, thereby realizing the automatic conveying, installation and fixing of the supporting net rack 8, reducing the labor intensity of workers and improving the construction efficiency of the supporting net rack 8.

[0036] With reference to the drawings and Figure 5 and Figure 6 , the embodiment 2 of the application discloses a supporting net rack conveying device, and the difference between the embodiment 2 and the embodiment 1 is that the lower side of the temporary protective plate 6 is further provided with a horizontal limiting assembly 7. The horizontal limiting assembly 7 comprises a mounting plate 71, a sliding mounting strip 72 and a telescopic limiting rod 73. The telescopic limiting rod 73 is a telescopic rod 411 in the prior art. The mounting plate 71 is fixed to the bottom of the temporary protective plate 6 in a horizontal state, and the mounting plate 71 is further provided with a mounting plate avoiding hole 711 corresponding to the position of the lower anchor rod machine 5. The sliding mounting strip 72 is parallel and spaced apart, each sliding mounting strip 72 is movably mounted on the mounting plate 71, and the moving direction of each sliding mounting strip 72 is the same. With reference to the drawings and Figure 7The first locking member 74 is arranged on the mounting plate 71 to lock and position the sliding mounting strip 72. In the embodiment, the opposite two side edges of the mounting plate 71 are provided with first guide sliding grooves 712, and the bottom of the sliding mounting strip 72 is fixedly provided with first guide sliding blocks 75 which are guided and movably arranged in the first guide sliding grooves 712. The outer side groove wall of the first guide sliding groove 712 is further provided with a first adjusting hole 713 which extends along the length direction of the first guide sliding groove 712. The first locking member 74 is a screw, and the side of the first guide sliding block 75 which faces the first adjusting hole 713 is provided with a first threaded hole (not shown in the figure), the rod portion of the first locking member 74 is screwed in the first threaded hole through the first adjusting hole 713, and the head portion of the first locking member 74 abuts against the mounting plate 71 on the two sides of the first adjusting hole 713. When the first locking member 74 is screwed, the sliding mounting strip 72 can be locked and positioned on the mounting plate 71.

[0037] With reference to Figure 6 and Figure 7 The telescopic limiting rods 73 are arranged on the sliding mounting strips 72 in a vertical state and can move along the length direction of the sliding mounting strips 72. Two telescopic limiting rods 73 are arranged on each sliding mounting strip 72, and the second locking member 76 is arranged on the sliding mounting strip 72 to lock and position the telescopic limiting rod 73. In the embodiment, the upper surface of the sliding mounting strip 72 is provided with a second guide sliding groove 721 which extends along the length direction thereof, and the bottom of the telescopic limiting rod 73 is fixedly provided with a second guide sliding block 77 which is guided and movably arranged in the second guide sliding groove 721. The side groove wall of the second guide sliding groove 721 is further provided with a second adjusting hole 722 which extends along the length direction of the second guide sliding groove 721. The second locking member 76 is a screw, and the side of the second guide sliding block 77 which faces the second adjusting hole 722 is provided with a second threaded hole (not shown in the figure), the rod portion of the second locking member 76 is screwed in the second threaded hole through the second adjusting hole 722, and the head portion of the second locking member 76 abuts against the sliding mounting strip 72 on the two sides of the second adjusting hole 722. When the second locking member 76 is screwed, the telescopic limiting rod 73 can be locked and positioned on the sliding mounting strip 72.

[0038] With reference to Figure 8The implementation principle of the embodiment 2 of the present application is that when the support net rack conveying device is in use, after the support net rack 8 is conveyed to the terminal position, the worker elongates the telescopic limiting rods 73 and passes them through the mesh of the support net rack 8 upwards, then moves the telescopic limiting rods 73 so that the circumferential side surfaces of the telescopic limiting rods 73 abut against the four sides of the support net rack 8, then locks and positions the sliding installation bars 72 on the installation plates 71 through the first locking members 74, locks and positions the telescopic limiting rods 73 on the sliding installation bars 72 through the second locking members 76, and the telescopic limiting rods 73 cooperate with each other to limit the support net rack 8 in the horizontal direction, so that the support net rack 8 can only move in the vertical direction and cannot move in the horizontal direction, thereby preventing the support net rack 8 from moving in the horizontal direction when it is jacked and riveted to the tunnel top wall by the anchor rod machine 5, and improving the position accuracy of the support net rack 8 fixed on the tunnel top wall.

[0039] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A support grid rack transport device, characterized by, The trolley (1), the net rack conveying mechanism, the lifting assembly (4) and the anchor rod machine (5), the lifting assembly (4) and the anchor rod machine (5) are fixedly installed on the trolley (1), the net rack conveying mechanism is installed on the driving end of the lifting assembly (4), the lifting assembly (4) can drive the net rack conveying mechanism to lift, the net rack conveying mechanism has an initial position and an end position, the net rack conveying mechanism can carry the supporting net rack (8) and convey the supporting net rack (8) from the initial position to the end position, the anchor rod machine (5) is located on the side of the end position of the net rack conveying assembly, and the anchor rod machine (5) is used for fixing the supporting net rack (8) on the tunnel top wall; The net rack conveying mechanism comprises a conveying drive assembly (2) and a carrying net rack (3), the carrying net rack (3) is fixed on the driving end of the conveying drive assembly (2), and the carrying net rack (3) is used for supporting the supporting net rack (8); the carrying net rack (3) is provided with a carrying net rack avoiding hole (31), and the carrying net rack avoiding hole (31) is used for avoiding the anchor rod machine (5); The conveying drive assembly (2) comprises a winch (21), a sliding rail (22) and a sliding block (23) slidingly arranged on the sliding rail (22), a traction rope of the winch (21) is connected with the sliding block (23) to pull the sliding block (23) to reciprocatingly move on the sliding rail (22), the sliding rail (22) is fixedly arranged on the driving end of the lifting assembly (4), and the carrying net rack (3) is fixed on the sliding block (23); The anchor rod machine (5) is further provided with a temporary protection plate (6), the temporary protection plate (6) is fixedly arranged on the end of the sliding rail (22) close to the end position, the temporary protection plate (6) is further provided with a protection plate avoiding hole (61) corresponding to the position of the lower anchor rod machine (5), and the temporary protection plate (6) is used for preventing the tunnel top wall from collapsing and destroying the device below; The temporary protection plate (6) is further provided with a horizontal limiting assembly (7), the horizontal limiting assembly (7) comprises a mounting plate (71), sliding mounting strips (72) and telescopic limiting rods (73), the mounting plate (71) is fixed at the bottom of the temporary protection plate (6) in a horizontal state, the mounting plate (71) is further provided with a mounting plate avoiding hole (711) corresponding to the position of the lower anchor rod machine (5), the sliding mounting strips (72) are arranged in parallel and at intervals, each sliding mounting strip (72) is guided and moved on the mounting plate (71), and the guiding and moving directions of each sliding mounting strip (72) are the same, the mounting plate (71) is further provided with a first locking piece (74) for locking and positioning the sliding mounting strip (72), the telescopic limiting rod (73) is installed on the sliding mounting strip (72) in a vertical state, and the telescopic limiting rod (73) can move along the length direction of the sliding mounting strip (72); each sliding mounting strip (72) is provided with at least two telescopic limiting rods (73), and the sliding mounting strip (72) is further provided with a second locking piece (76) for locking and positioning the telescopic limiting rod (73), and the telescopic limiting rod (73) can be lengthened or shortened.

2. The support grid rack transport apparatus of claim 1, wherein, The lifting assembly (4) comprises a hydraulic cylinder (41), a supporting column (42) and a guide column (43), the hydraulic cylinder (41) and the guide column (43) are fixed on the trolley (1), the upper end surface of the guide column (43) is provided with a guide hole extending vertically downward, the supporting column (42) is movably inserted into the guide hole in the vertical direction, the telescopic rod (411) of the hydraulic cylinder (41) is arranged vertically upward, the end of the telescopic rod (411) is fixedly connected with the upper end of the supporting column (42), and the slide rail (22) is fixed to the upper end of the supporting column (42).

3. The support grid rack transport of claim 1, wherein, The first locking member (74) is a screw rod, first guide sliding grooves (712) are formed in the opposite two side edges of the mounting plate (71), first guide sliding blocks (75) are fixedly arranged at the bottom of the sliding mounting strip (72), the first guide sliding blocks (75) are movably arranged in the first guide sliding grooves (712), first adjusting holes (713) are further formed in the outer side groove walls of the first guide sliding grooves (712), the first adjusting holes (713) extend along the length direction of the first guide sliding grooves (712), first threaded holes are formed in the side of the first guide sliding blocks (75) facing the first adjusting holes (713), the rod part of the first locking member (74) is screwed in the first threaded holes through the first adjusting holes (713), the head part of the first locking member (74) abuts against the mounting plate (71) on the two sides of the first adjusting holes (713), and the first locking member (74) can lock and position the sliding mounting strip (72) on the mounting plate (71) when being screwed.

4. The support screen rack transport apparatus of claim 3, wherein, The second locking member (76) is a screw rod, a second guide sliding groove (721) extending along the length direction of the sliding mounting strip (72) is formed in the upper surface of the sliding mounting strip (72), a second guide sliding block (77) is fixedly arranged at the bottom of the telescopic limiting rod (73), the second guide sliding block (77) is movably arranged in the second guide sliding groove (721), a second adjusting hole (722) is further formed in the side groove wall of the second guide sliding groove (721), the second adjusting hole (722) extends along the length direction of the second guide sliding groove (721), a second threaded hole is formed in the side of the second guide sliding block (77) facing the second adjusting hole (722), the rod part of the second locking member (76) is screwed in the second threaded hole through the second adjusting hole (722), the head part of the second locking member (76) abuts against the sliding mounting strip (72) on the two sides of the second adjusting hole (722), and the second locking member (76) can lock and position the telescopic limiting rod (73) on the sliding mounting strip (72) when being screwed.

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