Prefabricated truss composite floor slab galling equipment for fabricated building

Abstract

The utility model relates to a prefabricated truss composite floor slab galling device for a prefabricated building, which comprises a door-shaped frame which can be arranged in a crossing manner along the short edge direction of a prefabricated table, moving components which can linearly walk are symmetrically arranged at the two bottom ends of the door-shaped frame respectively, and rectangular guide holes are vertically formed in the upper parts of the two side surfaces of the door-shaped frame in a penetrating manner; a guide plate is arranged in a horizontal gap between the two guide holes in a penetrating mode, and the two ends of the guide plate are connected with suspension supporting assemblies suspended at the tops of the corresponding guide holes in a lifting and hanging mode respectively. A rail hole is formed in the guide plate in a penetrating mode along the center line of the guide plate, a galling mechanism is transversely arranged in the rail hole in a sliding and suspending mode, and the galling mechanism is pulled to move left and right through pulling assemblies symmetrically arranged on the top face of the end of the guide plate. According to the utility model, depth difference caused by non-uniform manual force application can be avoided, linear distortion caused by manual operation is eliminated, and the width consistency of grooves is ensured; operators can complete equipment control without standing on the edge of the prefabricating table, and the hidden danger that the operators fall down is fundamentally avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fabricated building processing, especially relates to a prefabricated truss composite floor roughening equipment for fabricated building. BACKGROUND

[0002] In the field of fabricated building, in the production process of prefabricated truss composite floor, in order to realize effective composite with cast-in-place concrete layer to form integral stress structure, specific rough interface needs to be formed on the top surface of prefabricated floor component.

[0003] The current industry generally adopts the manual processing mode, and the operation personnel need to carry the rake tool to implement the roughening operation on the prefabricated floor surface on the prefabricated platform, and the process can easily cause the width unevenness, linear distortion and depth difference of the groove pattern, which not only affects the structural bonding strength and appearance quality of the prefabricated floor, but also has the safety risk of accidental falling of the operation personnel. UTILITY MODEL CONTENT

[0004] The utility model provides a prefabricated truss composite floor roughening equipment for fabricated building in view of the deficiency of prior art, and the specific technical scheme is as follows:

[0005] The utility model provides a prefabricated truss composite floor roughening equipment for fabricated building, which is used for roughening the surface of the prefabricated floor in the prefabricated platform top mould, and the equipment comprises a portal frame arranged across along the short side direction of the prefabricated platform, the two bottom ends of the portal frame are respectively provided with movable assemblies that can move linearly, the upper parts of the two side faces of the portal frame are vertically provided with rectangular guide holes, a guide plate is arranged in the horizontal gap between the two guide holes, and the two ends of the guide plate are respectively liftably connected with suspension assemblies suspended at the top of the corresponding guide hole; a track hole is vertically arranged in the guide plate along the center line, a roughening mechanism is suspended in the track hole and can slide horizontally, and the roughening mechanism is pulled left and right by pulling assemblies arranged symmetrically on the top surface of the end of the guide plate.

[0006] As an optimal technical scheme of the utility model, the roughening mechanism comprises an I-shaped block that is horizontally slidably connected with the track hole, a cross beam plate is suspended on the bottom surface of the I-shaped block and is perpendicular to the track hole in space, and a plurality of roughening rods in the form of rake claws are arranged at equal intervals on the bottom surface of the cross beam plate along the long side direction.

[0007] As a preferred technical solution of this utility model, the I-beam block and the crossbeam plate are connected by a displacement assembly; the displacement assembly includes a hanger that is vertically fixed to the middle of the bottom surface of the I-beam block and has a "U"-shaped structure, and a cylindrical step rod is rotatably passed through the middle of the bottom surface of the hanger, and the bottom end of the step rod is vertically connected to the middle of the top surface of the crossbeam plate; a T-shaped pin is passed through the transverse gap between the hanger and the step rod, and a T-shaped limiting pin is passed through the vertical gap at the transverse end of the pin.

[0008] As a preferred technical solution of this utility model, the brushed rod is connected to the bottom surface of the crossbeam plate through an adjustment assembly; the adjustment assembly includes a locking tongue block vertically connected to the top of the brushed rod, the locking tongue block engaging with an inverted U-shaped bracket vertically connected to the bottom surface of the crossbeam plate, and the locking tongue block and the bracket being fastened together by a matching locking bolt.

[0009] As a preferred technical solution of this utility model, the traction assembly includes support plates vertically opposite each other on the top surface of the corresponding ends of the guide plate, a winding reel is rotatably connected between the two support plates, Z-shaped handles are axially connected to both ends of the rotating shaft of the winding reel, a pull rope is wound on the winding reel, and the free end of the pull rope is connected to an anchor block vertically connected to the middle of the top surface of the I-beam.

[0010] As a preferred technical solution of this utility model, the suspension assembly includes a suspension plate vertically connected to the top of the corresponding guide hole. The suspension plate is gapped through a lifting screw vertically fixed to the top surface of the corresponding end of the guide plate. The lifting screw is clamped and positioned between itself and the suspension plate by two positioning nuts axially screwed on it.

[0011] As a preferred embodiment of the present invention, the movable component includes a square plate that is vertically fixed to the bottom of the gantry frame, and rollers are symmetrically connected to the four corners of the bottom surface of the square plate.

[0012] As a preferred technical solution of this utility model, channel steel is placed symmetrically on the two long sides of the prefabrication platform, and the rollers of the moving component can roll along the corresponding channel steel in a straight line.

[0013] The beneficial effects of this utility model are:

[0014] 1. In this utility model, the portal frame spans the short side of the precast platform, and in conjunction with the linear movement function of the bottom moving component, allows the equipment to move as a whole along the long side of the precast platform. The track holes and two traction components form a transverse drive system, realizing the reciprocating motion of the roughening mechanism along the short side of the precast platform. The two sets of movement directions are orthogonally superimposed to form a planar gridded processing path, ensuring that no part of the precast floor slab surface is missed. Compared with manual random operation, this eliminates missed areas and achieves uniform coverage of the entire surface through mechanical trajectory planning.

[0015] 2、The utility model discloses a guide plate realizes vertical lifting adjustment through the suspension assembly, and combining the limiting function of guide hole, the operation depth of the drawing mechanism can be well controlled, and the depth difference caused by uneven artificial force is avoided, the track hole and the pulling assembly form a precision linear guide system, the trajectory of the drawing mechanism is straight when moving horizontally, and linear distortion caused by manual operation is eliminated, the drawing mechanism can be pulled reversely to carry out continuous drawing action after the door-shaped frame is shifted, and resetting is not needed, the sliding fit structure of the drawing mechanism and the track hole can limit the deflection angle of the tool, maintain the perpendicularity between the toothed tool and the concrete surface, and guarantee the consistency of the groove width.

[0016] 3、The utility model discloses a door-shaped frame forms a three-dimensional operation space across the prefabricating table, and the operator can complete equipment control without standing at the edge of the prefabricating table, which fundamentally avoids the personnel falling hazard. ACCURACY

[0017] Figure 1 The utility model discloses a drawing equipment's three-dimensional structure schematic diagram shows;

[0018] Figure 2 The utility model discloses a drawing equipment's three-dimensional structure schematic diagram shows;

[0019] Figure 3 The utility model discloses a drawing equipment's three-dimensional structure schematic diagram shows that the door-shaped frame is arranged on the prefabricating table;

[0020] Figure 4 The structure front view in shown in Figure 3 ;

[0021] Figure 5 The structure plan view in shown in Figure 4 ;

[0022] As shown in the drawing: 1, door-shaped frame, 11, guide hole, 2, moving assembly, 21, square plate, 22, gyro wheel, 3, guide plate, 31, track hole, 4, suspension assembly, 41, suspension plate, 42, lifting screw rod, 43, locating nut, 5, drawing mechanism, 51, I -shaped block, 511, anchor block, 52, crossbeam plate, 53, drawing rod, 54, turning assembly, 541, lock tongue block, 542, hanger, 543, locking bolt, 55, transposition assembly, 551, hanger, 552, step rod, 553, bolt, 5531, limiting pin, 6, pulling assembly, 61, support plate, 62, winding reel, 63, handle, 64, pull rope, 7, channel steel, 8, prefabricating table, 81, mould, 9, prefabricated floor, 91, reinforcing steel frame, 92, groove pattern. CONCRETE EMBODIMENT

[0023] In order to make the utility model purposes, technical solutions and advantages more clearly, the following is further described in detail in combination with examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0024] Embodiment one

[0025] To solve the technical problems in the background art, a prefabricated truss composite floor roughening device for fabricated buildings is given as follows:

[0026] As shown in the combination Figures 1-5 A prefabricated truss composite floor roughening device for fabricated buildings, which is used for roughening the surface of the prefabricated floor 9 in the prefabricated platform 8 top surface mold 81, the device includes a door-shaped frame 1 which can be arranged across the short edge direction of the prefabricated platform 8, the door-shaped frame 1 has two bottom ends which are symmetrically provided with a moving assembly 2 that can move linearly, the upper part of the two side faces of the door-shaped frame 1 is vertically provided with a rectangular guide hole 11, and a guide plate 3 is arranged in the horizontal gap between the two guide holes 11, and the two ends of the guide plate 3 are respectively and liftably connected to a suspension assembly 4 which is suspended at the top of the corresponding guide hole 11; the guide plate 3 is provided with a track hole 31 which penetrates along the center line, and a roughening mechanism 5 is horizontally slidably suspended in the track hole 31, and the roughening mechanism 5 is pulled left and right by a pulling assembly 6 which is symmetrically arranged on the top surface of the end of the guide plate 3.

[0027] By adopting the above technical scheme, the door-shaped frame 1 in the device is arranged across the short edge direction of the prefabricated platform, and the linear movement function of the bottom moving assembly 2 is used to make the device move as a whole along the long edge direction of the prefabricated platform 8; the track hole 31 and the two pulling assemblies 6 form a horizontal driving system to realize the reciprocating movement of the roughening mechanism 5 along the short edge direction of the prefabricated platform 8; the two groups of movement directions are orthogonal and superimposed to form a planar grid processing path, ensuring that the surface of the prefabricated floor 9 is processed without omission. Compared with manual random operation, the device eliminates the omission of the processing area and realizes uniform coverage of the entire surface through mechanical trajectory planning.

[0028] The guide plate 3 is vertically adjusted by the suspension assembly 4, and in combination with the limiting function of the guide hole 11, the working depth of the roughening mechanism 5 can be well controlled to avoid the depth difference caused by uneven manual force; the track hole 31 and the pulling assembly 6 form a precise linear guide system to ensure that the trajectory of the roughening mechanism 5 is straight when it moves horizontally, eliminating the linear distortion caused by manual operation; the two pulling assemblies 6 move left and right to pull the roughening mechanism 5 in the opposite direction after the door-shaped frame 1 is moved to perform continuous roughening actions without the need for repositioning; the sliding fit structure of the roughening mechanism 5 and the track hole 31 can limit the tool deflection angle, maintain the perpendicularity of the toothed tool and the concrete surface, and ensure the consistency of the groove width.

[0029] The door-shaped frame 1 forms a three-dimensional operation space across the prefabricated platform, and the operator can complete the equipment operation without standing on the edge of the prefabricated platform 8, thereby fundamentally avoiding the risk of personnel falling.

[0030] As shown in Figure 2 , the pulling mechanism 5 includes a I-shaped block 51 which is in transverse sliding clamping cooperation with the track hole 31, and the bottom surface of the I-shaped block 51 suspends a cross beam plate 52 which is perpendicular to the track hole 31 in space, and the bottom surface of the cross beam plate 52 is arranged with a plurality of rake-shaped structure pulling rods 53 along the long edge direction at equal intervals.

[0031] As shown in Figure 1 and Figure 2 , the pulling assembly 6 includes a support plate 61 which is vertically arranged on the top surface of the corresponding end of the guide plate 3, and a winding reel 62 is rotatably connected between the two support plates 61, and the two ends of the rotating shaft of the winding reel 62 are respectively connected with Z-shaped handles 63 in the axial direction, and the winding reel 62 is wound with a pulling rope 64, and the free end of the pulling rope 64 is connected with an anchor block 511 which is vertically connected to the top surface of the I-shaped block 51.

[0032] As shown in Figure 1 , the suspension assembly 4 includes a suspension plate 41 which is vertically connected to the top of the corresponding guide hole 11, and the suspension plate 41 is gap-connected with a lifting screw 42 which is vertically fixed to the top surface of the corresponding end of the guide plate 3, and the lifting screw 42 is clamped and positioned between the two positioning nuts 43 which are axially screwed on the lifting screw 42 and the suspension plate 41.

[0033] By adopting the above technical scheme, the multi-claw array dynamic contact structure is adopted in the pulling mechanism 5, which guarantees the uniformity and forming efficiency of the groove pattern 92; wherein the longitudinal section of the I-shaped block 51 forms double-sided guide constraint with the track hole 31, which ensures that the pulling mechanism 5 does not deviate when moving transversely, and avoids the linear distortion of the groove pattern 92 caused by tool shaking during manual operation; the rake-shaped structure is adopted for the pulling rod 53, and the arc-shaped rake end is designed to be made of hard alloy material, which ensures wear resistance while realizing continuous breaking action and forming a groove pattern 92 with consistent depth.

[0034] The winding reel 62 in the pulling assembly 6 is synchronously manually rotated through the Z-shaped handle 63, which drives the pulling rope 64 to pull the I-shaped block 51, without the need for additional power, thereby reducing operation and maintenance costs; the pulling rope 64 is made of high-strength fiber material, which ensures the displacement transmission accuracy; the anchor point of the pulling rope 64 is located in the middle of the top surface of the I-shaped block 51, so that the action line of the pulling force passes through the center of gravity of the mechanism, thereby avoiding the generation of overturning moment and ensuring that the pulling rod 53 is better pressed into the concrete surface of the prefabricated floor 9.

[0035] The suspension assembly 4 is configured to adjust the clamping height of the lifting screw 42 by rotating the two positioning nuts 43, thereby adjusting the vertical position of the guide plate 3 and precisely controlling the pressing depth of the roughening rod 53. The surface of the lifting screw 42 can also be marked with scale marks, allowing operators to quickly set the roughening depth according to the thickness of the precast floor slab 9.

[0036] like Figure 1 As shown, the moving component 2 includes a square plate 21 that is vertically fixed to the bottom end of the gantry frame 1, and rollers 22 are symmetrically connected to the four corners of the bottom surface of the square plate 21.

[0037] like Figures 3-5 As shown, channel steel 7 is placed symmetrically on the two long sides of the prefabrication platform 8, and the rollers 22 of the moving component 2 can roll along the corresponding channel steel 7 in a straight line.

[0038] By adopting the above technical solution, the mobile component 2 is equipped with a four-wheel symmetrical distributed load-bearing structure to improve the stability of equipment movement. The square plate 21 is vertically fixed to the bottom of the column of the portal frame 1 to form a box-shaped cross-section support structure, so that the load of the portal frame 1 is evenly transferred to the ground through the four rollers 22 to avoid single-point overload. The four corner rollers 22 are symmetrically arranged to form a rectangular support surface, and the lateral span matches the short side dimension of the prefabricated platform 8, which effectively suppresses the lateral overturning moment caused by the shift of the center of gravity when the equipment moves.

[0039] The channel steel 7 forms a modular track system to achieve high-precision walking guidance; the double channel steels are laid in parallel on the outer side of the long side of the prefabricated platform 8, with the spacing precisely matching the roller wheel distance of the moving component 2, forming a closed guide channel, so that the roller 22 cannot be dislodged laterally when rolling in the web of the channel steel 7, ensuring the straightness of the equipment's walking trajectory.

[0040] Example 2

[0041] Combination Figures 2-4 As shown, based on the above embodiments, this embodiment further provides the following:

[0042] In this embodiment, the I-beam 51 and the crossbeam 52 are connected by a shifting assembly 55. The shifting assembly 55 includes a hanger 551 that is vertically fixed to the middle of the bottom surface of the I-beam 51 and has a "U"-shaped structure. A cylindrical step rod 552 is rotatably passed through the middle of the bottom surface of the hanger 551. The bottom end of the step rod 552 is vertically connected to the middle of the top surface of the crossbeam 52. A T-shaped pin 553 is passed through the transverse gap between the hanger 551 and the step rod 552. A T-shaped limiting pin 5531 is passed through the vertical gap at the transverse end of the pin 553.

[0043] By adopting the technical scheme, the "U" shaped structure of the hanger 551 in the rotating component 55 is arranged to form a semi-closed bearing seat, the stepped rod 552 is matched with the inner hole of the hanger in a clearance mode, the beam plate 52 can rotate around the axis, and the basic freedom degree for adjusting the operation direction of the pulling bar 53 is provided, so that the pulling bar 53 of the pulling mechanism 5 can change the direction of the pulling bar 53 by 180° when the pulling bar 53 of the pulling mechanism 5 is pulled by the pulling assembly 6 on one side and the pulling assembly 6 on the other side pulls reversely, so that the outer arc surface of the pulling bar 53 always follows the pulling direction, and the consistency of the groove pattern 92 is ensured.

[0044] Embodiment three

[0045] In combination Figures 2-4 As shown in the above embodiment, the embodiment further provides the following content on the basis of the above embodiment.

[0046] In the embodiment, the pulling bar 53 and the bottom surface of the beam plate 52 are connected through the rotating component 54; the rotating component 54 comprises a lock tongue block 541 vertically connected with the top end of the pulling bar 53, the lock tongue block 541 is in clamping cooperation with a hanging rack 542 in a reverse U shape and vertically connected with the bottom surface of the beam plate 52, and the lock tongue block 541 and the hanging rack 542 are fastened and connected through a locking bolt 543 matched therewith.

[0047] By adopting the technical scheme, the rotating component 54 can be inclined upward along the axis after the locking bolt 543 is loosened, so that the reinforcing steel bars 91 arranged at intervals on the prefabricated floor 9 can be avoided, and the area outside the reinforcing steel bars 91 on the surface of the prefabricated floor 9 can be pulled without affecting the area outside the reinforcing steel bars 91 on the surface of the prefabricated floor 9; and the detachable design of the rotating component 54 can also achieve quick replacement of the damaged pulling bar 53.

[0048] Working principle and use process of the utility model:

[0049] In use, first, the channel steel 7 is laid in parallel on the long side outside the prefabricated table 8, and the interval and the levelness are calibrated; the roller 22 of the moving assembly 2 is embedded in the channel steel 7, so that the door-shaped frame 1 spans the short side of the prefabricated table 8; the positioning nut 43 of the rotating suspension assembly 4 is rotated, the lifting screw 42 is driven to drive the guide plate 3 to move downward to the set height.

[0050] Then, the operator pushes the door frame 1 along the channel steel 7, moves the rollers 22 of the moving assembly 2 to realize the movement of the whole device along the long side of the prefabricated platform 8 to the position of the prefabricated floor 9 to be pulled, and moves the outer arc surface of the pulling rod 53 to the starting pulling point of the prefabricated floor 9; then, the handle 63 of the pulling assembly 6 on the side of the outer arc surface of the pulling rod 53 is manually rotated, the winding disc 62 is driven to wind and unwind the pulling rope 64, the I-beam 51 is moved transversely along the track hole 31 to the other end of the guide plate 3, so that a row of groove lines 92 is formed on the surface of the prefabricated floor 9.

[0051] The position of the door frame 1 is continuously adjusted, then the limiting pin 5531 and the plug pin 553 of the indexing assembly 55 are pulled out, the 180° rotating step rod 552 is rotated to drive the pulling rod 53 to rotate, so that the orientation of the outer arc surface of the pulling rod 53 is changed in the opposite direction, and then the plug pin 553 and the limiting pin 5531 are reinserted and locked; then the handle 63 of the pulling assembly 6 on the side of the outer arc surface of the pulling rod 53 is manually rotated, the winding disc 62 is driven to wind and unwind the pulling rope 64, the I-beam 51 is moved transversely along the track hole 31 to the initial end of the guide plate 3, so that a row of groove lines 92 is formed on the surface of the prefabricated floor 9 at this position.

[0052] If the steel reinforcement frame 91 arranged at intervals on the prefabricated floor 9 is encountered during pulling, the locking bolt 543 is loosened, and the pulling rod 53 is tilted upward along the axis, so that the steel reinforcement frame 91 is avoided during pulling, and the area outside the steel reinforcement frame 91 on the surface of the prefabricated floor 9 is not affected.

[0053] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A roughening device for prefabricated truss composite floor slabs in prefabricated buildings, the device being used to roughen the surface of prefabricated floor slabs (9) within the mold (81) on the top surface of a prefabrication platform (8), characterized in that: The equipment includes a portal frame (1) that can be set across the short side of the prefabrication platform (8). The two bottom ends of the portal frame (1) are respectively symmetrically provided with movable components (2) that can move in a straight line. The upper part of the two sides of the portal frame (1) is vertically provided with rectangular guide holes (11). A guide plate (3) is provided through the horizontal gap between the two guide holes (11). The two ends of the guide plate (3) are respectively suspended and raised and lowered by the suspension components (4) suspended at the top of the corresponding guide holes (11). The guide plate (3) is provided with a track hole (31) along its center line. A roughening mechanism (5) is slidably suspended in the track hole (31). The roughening mechanism (5) is pulled left and right by the pulling components (6) symmetrically provided on the top surface of the end of the guide plate (3).

2. The prefabricated truss composite floor slab roughening equipment for prefabricated buildings according to claim 1, characterized in that: The texturing mechanism (5) includes an I-beam (51) that is laterally slidably engaged with the track hole (31). The bottom surface of the I-beam (51) is suspended by a crossbeam plate (52) that is spatially perpendicular to the track hole (31). The bottom surface of the crossbeam plate (52) is provided with multiple rake-shaped texturing rods (53) arranged at equal intervals along its long side.

3. The prefabricated truss composite floor slab roughening equipment for prefabricated buildings according to claim 2, characterized in that: The I-beam (51) and the crossbeam (52) are connected by a shifting assembly (55); the shifting assembly (55) includes a hanger (551) that is vertically fixed to the middle of the bottom surface of the I-beam (51) and has a "U" shaped structure. A cylindrical step rod (552) is rotatably passed through the middle of the bottom surface of the hanger (551), and the bottom end of the step rod (552) is vertically connected to the middle of the top surface of the crossbeam (52). A T-shaped pin (553) is passed through the transverse gap between the hanger (551) and the step rod (552), and a T-shaped limiting pin (5531) is passed through the vertical gap at the transverse end of the pin (553).

4. The prefabricated truss composite floor slab roughening equipment for prefabricated buildings according to claim 2, characterized in that: The brushed rod (53) is connected to the bottom surface of the crossbeam plate (52) via a turning assembly (54); the turning assembly (54) includes a locking tongue block (541) vertically connected to the top of the brushed rod (53), the locking tongue block (541) engaging with an inverted U-shaped bracket (542) vertically connected to the bottom surface of the crossbeam plate (52), and the locking tongue block (541) and the bracket (542) are fastened together by a matching locking bolt (543).

5. The prefabricated truss composite floor slab roughening equipment for prefabricated buildings according to claim 2, characterized in that: The traction assembly (6) includes support plates (61) vertically opposite each other on the top surface of the corresponding ends of the guide plate (3). A winding disc (62) is rotatably connected between the two support plates (61). Z-shaped handles (63) are axially connected to both ends of the rotating shaft of the winding disc (62). A pull rope (64) is wound on the winding disc (62). The free end of the pull rope (64) is connected to an anchor block (511) vertically connected to the middle of the top surface of the I-beam (51).

6. The prefabricated truss composite floor slab roughening equipment for prefabricated buildings according to claim 5, characterized in that: The suspension assembly (4) includes a suspension plate (41) vertically connected to the top of the corresponding guide hole (11). The suspension plate (41) is gapped through a lifting screw (42) vertically fixed to the top surface of the corresponding end of the guide plate (3). The lifting screw (42) is clamped and positioned between the suspension plate (41) and the lifting plate (41) by two positioning nuts (43) axially screwed on it.

7. The prefabricated truss composite floor slab roughening equipment for prefabricated buildings according to claim 1, characterized in that: The moving component (2) includes a square plate (21) that is vertically fixed to the bottom of the gantry frame (1), and rollers (22) are symmetrically connected to the four corners of the bottom surface of the square plate (21).

8. The prefabricated truss composite floor slab roughening equipment for prefabricated buildings according to claim 7, characterized in that: The prefabrication platform (8) has channel steel (7) placed symmetrically on the ground along its two long sides, and the rollers (22) of the moving component (2) can roll and move along the corresponding channel steel (7) in a straight line.

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