A device for controlling the thickness of the inner wall plastering in the decoration engineering

Abstract

The application relates to the field of decoration engineering equipment, in particular to a device for controlling the thickness of inner wall plastering in decoration engineering, which comprises a supporting base, a fixed shell, track pieces and a supporting walking assembly. The fixed shell is installed at the top center position of the supporting base, the air compressor is installed in the fixed shell, the air outlet pipe of the air compressor is exposed to the fixed shell, and the two track pieces are symmetrically installed at the top of the fixed shell. The track piece is welded by two rectangular columns with the same width and different lengths, the end faces of the two rectangular columns are both provided with rectangular plates, one of the rectangular plates is fixed at the top of the fixed shell, and the rectangular column sidewall on the outer side of the same track piece is provided with a tooth groove. The supporting walking assembly is arranged between the two track pieces, one end of the supporting walking assembly is provided with a storage mechanism for filling cement mortar, and the bottom corner of the storage mechanism is provided with a thickness adjusting mechanism. The device has the characteristics of adjustable thickness plastering, higher plastering delicacy and lower waste rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of decoration engineering equipment, in particular to a device for controlling the thickness of inner wall plastering in decoration engineering. BACKGROUND

[0002] Plastering engineering is a traditional decoration engineering that uses cement mortar, mixed mortar or lime mortar to coat the surface of walls, floors and ceilings of buildings. In some areas, it is also called "powdering" or "painting". Plastering engineering refers to the process of coating the surface of the base material with plastering mortar, which has the functions of protecting the base layer and improving the appearance, and provides a special function system for the building. Plastering engineering has two functions: one is the protection function, which protects the wall from wind, rain and snow erosion, increases the moisture resistance and weather resistance of the wall surface, improves the thermal insulation ability of the wall, and improves the durability and thermal performance of the wall.

[0003] At present, in the process of plastering operation in decoration engineering, most of the operators still use the method of manual plastering with a scraper. Manual operation is easily affected by physical strength. In order to ensure the flatness of the wall plastering, manual leveling is needed before plastering to avoid the unevenness of the inner wall plastering after the plastering operation is completed, which affects the overall appearance. However, the working period is relatively long, and the thickness of the inner wall plastering cannot be actively controlled. At the same time, during the plastering process, some plastering actions adopt single-axis direction movement, i.e. up and down movement, which leads to the fact that the surface of the cement mortar is not fine enough and is prone to have pits and holes that need to be repaired subsequently. SUMMARY

[0004] In view of the problems of multiple manual plastering procedures, the inability to adjust the plastering thickness automatically and the low plastering effect in the prior art, the present application provides a device for controlling the thickness of inner wall plastering in decoration engineering.

[0005] The technical scheme adopted by the present application to solve the technical problems is as follows: a device for controlling the thickness of inner wall plastering in decoration engineering, comprising a support base, a fixed shell, a track piece and a support walking assembly, a fixed shell is installed at the top center position of the support base, an air compressor is installed in the fixed shell, and the air outlet pipe of the air compressor is exposed to the fixed shell, two track pieces are symmetrically installed at the top of the fixed shell;

[0006] The track piece is welded by two equal and equal-width rectangular columns of different lengths, and a rectangular plate is installed at the end face of each rectangular column, one of the rectangular plates is fixed at the top of the fixed shell, and the rectangular column side wall on the outer side of the same track piece is provided with a tooth groove;

[0007] Support walking assembly is arranged between the two track pieces, one end of the support walking assembly is provided with a storage mechanism for loading cement mortar, the bottom corner of the storage mechanism is provided with a thickness adjusting mechanism, the top of the storage mechanism is provided with a tremor mechanism.

[0008] Specifically, the support walking assembly comprises a support plate arranged between the two track pieces, the top of the support plate is symmetrically provided with positioning plates, one end of each positioning plate is independently provided with a first support shaft, the other end of the two positioning plates is inserted with a second support shaft, the two ends of the first support shaft and the second support shaft are provided with positioning wheels, the two positioning wheels on the same side are tightly arranged on the outer wall of one of the rectangular columns, the outer wall of the second support shaft and close to the positioning wheel is fixedly provided with a driving gear, and the driving gear is engaged with a gear slot, the top of the support plate is centrally provided with a driving motor, and the output shaft of the driving motor is connected with the second support shaft through a belt.

[0009] Specifically, the storage mechanism comprises a storage box fixed on the side wall of the support plate by welding, a threaded groove is formed in the bottom outer wall of the storage box, a jet pipe is arranged at the bottom inner corner of the storage box, a connecting pipe is arranged on the outer side wall of the storage box close to the driving motor, one end of the connecting pipe is connected with the jet pipe, the other end of the connecting pipe is connected with the air outlet pipe of the air compressor, and a plurality of mud injection holes are formed at the other corner of the inner bottom of the storage box at equal intervals.

[0010] Specifically, the thickness adjusting mechanism comprises rotating shafts, rotating discs, adjusting holes, anti-skid pads, positioning bolts, positioning sliding blocks, adjusting blocks, positioning sliding grooves and plastering plates, the two rotating shafts are rotatably arranged on the bottom of the storage box, and the outer wall of the area where the rotating shafts protrude out of the storage box is fixedly provided with a positioning pin, each rotating disc is sleeved with a rotating disc, the inside of the rotating disc is provided with an adjusting hole, the adjusting hole is inserted with a positioning bolt, the positioning bolt and the threaded groove are in a matching structure, the outer wall of the rotating disc is welded with a positioning sliding block, a adjusting block is arranged below the rotating disc, the outer wall of the adjusting block is provided with a positioning sliding groove which is matched with the positioning sliding block for sliding, and the outer wall of the adjusting block is welded with a plastering plate.

[0011] Specifically, one side of the adjusting block is provided with a displacement slot, and one inner wall of the displacement slot is welded with a round rod.

[0012] Specifically, the tremor mechanism comprises support arms, positioning shafts, rubber driving wheels and synchronous belts, the two support arms are symmetrically welded on the top outer wall of the storage box, the positioning shafts are inserted between the two support arms, the rubber driving wheels are symmetrically arranged on the positioning shafts, and the synchronous belts are arranged on one end of the positioning shafts.

[0013] Specific, the tremor mechanism further comprises a positioning frame, a ring-shaped support plate, a driving ring and a corrugated annular groove, the positioning frame is fixed on the outer wall of the storage box by welding, the inner side wall of the positioning frame is welded with the ring-shaped support plate, one side of the ring-shaped support plate is rotatably sleeved with the driving ring, part of the driving ring is located in the displacement groove, the outer wall of the driving ring is matchedly installed at the other end of the synchronous belt, and the inner wall of the driving ring is provided with the corrugated annular groove at the central position, and the corrugated annular groove and the round rod are in matching structure.

[0014] Specific, the inside of the plastering plate is provided with a leakage hole, the inner side wall of the leakage hole towards the bottom of the plastering plate is an inclined surface, and the inclination direction is towards the fixed shell.

[0015] Specific, the bottom outer wall of the plastering plate is welded with a V-shaped plate, the V-shaped plate is located directly below the leakage hole, and the length of the V-shaped plate is greater than the length of the leakage hole.

[0016] The beneficial effects of the present application are:

[0017] (1) The device for controlling the thickness of inner wall plastering in decoration engineering, which is provided with a supporting walking assembly, a storage mechanism, a thickness adjusting mechanism and a tremor mechanism, can effectively reduce the labor loss and has high working efficiency compared with the traditional manual plastering method. The position of the plastering plate is not fixed, and it can adjust the distance from the wall surface according to the actual wall and decoration requirements to realize the plastering operation of cement mortar with different thicknesses without the need for the traditional plastering operation to perform the leveling process, and the application range is wider.

[0018] (2) The device for controlling the thickness of inner wall plastering in decoration engineering can not only perform vertical plastering operation on the cement mortar initially attached to the wall, but also perform circumferential plastering operation, so that the fineness of plastering can be effectively guaranteed and the plastering effect can be improved. Under the action of plastering, the excess cement mortar will slide from the leakage hole and fall onto the surface of the V-shaped plate under the action of its own gravity. This way can conveniently collect the excess cement mortar, reduce the waste of cement mortar, and prevent the cement mortar from falling to the ground, which is not conducive to the subsequent construction site cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in combination with the drawings and examples.

[0020] Figure 1 To show the overall structure of the present application Figure One ;

[0021] Figure 2A perspective view of the overall structure of the present application Figure Two ;

[0022] Figure 3 A perspective view of the overall structure of the present application Figure Three ;

[0023] Figure 4 A perspective view of the overall structure of the present application Figure 3 ;

[0024] Figure 5 A perspective view of the overall structure of the present application Figure 1 ;

[0025] Figure 6 A perspective view of the overall structure of the present application Figure 2 ;

[0026] Figure 7 A perspective view of the overall structure of the present application Figure 4 ;

[0027] In the figure: 1, support base; 2, fixed shell; 3, track piece; 4, support walking assembly; 5, storage mechanism; 6, thickness adjusting mechanism; 7, tremor mechanism; 41, support plate; 42, positioning plate; 43, first support shaft; 44, positioning wheel; 45, second support shaft; 46, drive gear; 47, drive motor; 51, storage box; 52, jet pipe; 53, connecting pipe; 54, mud injection hole; 61, rotating shaft; 62, rotating disc; 63, adjusting hole; 64, non-slip pad; 65, positioning bolt; 66, positioning sliding block; 67, adjusting block; 68, positioning sliding groove; 69, plastering plate; 671, displacement slot; 672, round rod; 71, support arm; 72, positioning rotating shaft; 73, rubber drive wheel; 74, synchronous belt; 75, positioning frame; 76, annular supporting plate; 77, drive ring; 78, corrugated annular groove; 691, leakage hole and 692, V-shaped plate. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0029] In addition, the terms below are defined based on the functions in the present application, which can be different according to the intentions or habits of users or users. Therefore, these terms are defined based on the entire content of the specification.

[0030] Reference Figure 1The application discloses a device for controlling the thickness of inner wall plastering in decoration engineering, which comprises a supporting base 1, a fixed shell 2, track pieces 3 and a supporting walking assembly 4.

[0031] Referring to Figure 1 The track pieces 3 are composed of two rectangular columns with the same width and different lengths, and the end faces of the two rectangular columns are provided with rectangular plates, one of which is fixed on the top of the fixed shell 2, and the rectangular column side walls on the outer side of the same track piece 3 are provided with tooth grooves.

[0032] Referring to Figure 1 and Figure 2 The supporting walking assembly 4 is arranged between the two track pieces 3, one end of the supporting walking assembly 4 is provided with a storage mechanism 5 for filling cement mortar, the bottom corner of the storage mechanism 5 is provided with a thickness adjusting mechanism 6, the top of the storage mechanism 5 is provided with a tremor mechanism 7, and the cement mortar is prepared by an operator before being used for plastering the inner wall.

[0033] Referring to Figures 1-6The support walking assembly 4 comprises a support plate 41 arranged between the two track members 3, the top of the support plate 41 is symmetrically provided with positioning plates 42, one end of each positioning plate 42 is independently provided with a first support shaft 43, the other end of the two positioning plates 42 is inserted with a second support shaft 45, the two ends of the first support shaft 43 and the second support shaft 45 are provided with positioning wheels 44, the two positioning wheels 44 on the same side are tightly close to the outer wall of one of the rectangular columns, the outer wall of the second support shaft 45 and close to the position of the positioning wheel 44 is fixedly provided with a driving gear 46, the driving gear 46 is engaged with the tooth groove, the top of the support plate 41 is centrally provided with a driving motor 47, the output shaft of the driving motor 47 is connected with the second support shaft 45 through a belt, the thickness adjusting mechanism 6 comprises rotating shafts 61, rotating discs 62, adjusting holes 63, anti-skid pads 64, positioning bolts 65, positioning sliding blocks 66, adjusting blocks 67, positioning sliding grooves 68 and plastering plates 69, the two rotating shafts 61 are rotatably arranged on the bottom of the two side walls of the storage box 51, the outer wall of the rotating shaft 61 which is exposed to the area outside the storage box 51 is fixedly provided with a positioning pin, the rotating disc 62 is sleeved with the rotating shaft 61 which is exposed to the area outside the storage box 51, the inner part of the rotating disc 62 is provided with the adjusting hole 63, the adjusting hole 63 is inserted with the positioning bolt 65, the positioning bolt 65 and the threaded groove are a matching structure, the outer wall of the rotating disc 62 is welded with the positioning sliding block 66, the adjusting block 67 is arranged below the rotating disc 62, the outer wall of the adjusting block 67 is provided with the positioning sliding groove 68 which is matched with the positioning sliding block 66 to slide, the outer wall of the adjusting block 67 is welded with the plastering plate 69, the positioning sliding groove 68 and the positioning sliding block 66 limit the circumferential movement of the adjusting block 67 relative to the rotating disc 62, in the specific work, according to the actual plastering requirement, the user holds the handle on one side of the support base 1, moves one end of the thickness adjusting mechanism 6 to the inner wall body which needs to be plastered, then rotates the rotating disc 62 to drive the co-rotation of the adjusting block 67 and the plastering plate 69, places the measuring scale water below the lower end surface of the plastering plate 69, the other end of the measuring scale is perpendicular to the inner wall body, the operator visually measures the horizontal distance of the plastering plate 69 relative to the measuring scale, stops rotating the rotating disc 62 when the distance between the bottom of the plastering plate 69 and the wall meets the requirement of plastering, then rotates the positioning bolt 65 to make it rotate into the threaded groove, in this process, the side wall of the positioning bolt 65 extrudes the rotating disc 62 to make the positioning sliding block 66 on the bottom of the rotating disc 62 slide in the positioning sliding groove 68, until the side wall of the rotating disc 62 extrudes the side wall of the anti-skid pad 64, the circumferential position of the rotating disc 62 is locked, that is, the position of the plastering plate 69 is locked.

[0034] Referring to Figures 2-7The storage mechanism 5 comprises a storage box 51 fixed by electric welding on the side wall of the support plate 41, a threaded groove is formed on the bottom outer wall of the storage box 51, a gas jet pipe 52 is installed at the corner of the inner wall bottom of the storage box 51, a connecting pipe 53 is installed on the outer side wall of the storage box 51 close to the driving motor 47, one end of the connecting pipe 53 is connected with the gas jet pipe 52, the other end of the connecting pipe 53 is connected with the air outlet pipe of the air compressor, the mud jet holes 54 are formed at the other corner of the inner bottom of the storage box 51 at equal intervals, the manually proportioned cement mortar is manually carried to the storage box 51 by the shovel, then the driving motor 47 and the air compressor are manually driven to enter the working state, the driving motor 47 drives the second support shaft 45 to rotate through the belt after working, the second support shaft 45 drives the driving gear 46 to engage with the toothed groove of the rectangular column, thereby having the vertical traction, the two positioning wheels 44 of the same side track member 3 are located on the side wall of the other rectangular column, having the positioning effect to prevent the driving gear 46 from deviating from the movement direction relative to the rectangular column, the movement direction of the driving gear 46 relative to the track member 3 is determined by the forward and reverse rotation of the driving motor 47, the air compressor works synchronously in the process of driving the support plate 41 to rise by the driving gear 46, the air compressor sprays the gas from the gas jet pipe 52 through the air outlet pipe and the connecting pipe 53, the sprayed gas exerts the thrust force on the cement mortar stored in the storage box 51, so that the cement mortar is sprayed from the mud jet holes 54 under the gas pressure thrust and shot on the surface wall of the wall body, thereby achieving the effect of preliminary cement mortar plastering; after the cement mortar is sprayed on the surface of the wall body, the plastering plate 69 with the adjusted angle moves with the storage box 51, and the plastering plate 69 plasters the preliminarily sprayed cement mortar in the vertical direction.

[0035] Referring to Figure 7 One side of the adjusting block 67 is provided with a displacement groove 671, and one inner wall of the displacement groove 671 is welded with a round rod 672.

[0036] Referring to Figures 1-5 The tremor mechanism 7 comprises support arms 71, a positioning rotating shaft 72, rubber driving wheels 73 and a synchronous belt 74, the two support arms 71 are symmetrically welded on the top outer wall of the storage box 51, the positioning rotating shaft 72 is inserted between the two support arms 71, the rubber driving wheels 73 are symmetrically installed on the upper part of the positioning rotating shaft 72, the synchronous belt 74 is installed on one end of the positioning rotating shaft 72, and the rubber driving wheels 73 are tightly close to the surface wall of the wall body during the adjustment of the thickness, so that the rubber driving wheels 73 rotate under the friction in the process of the rising of the storage box 51, and the rubber driving wheels 73 drive the synchronous belt 74 to rotate through the positioning rotating shaft 72.

[0037] Referring to Figures 1-5The tremor mechanism 7 further comprises a positioning frame 75, an annular supporting plate 76, a driving circular ring 77 and a corrugated annular groove 78, the positioning frame 75 is fixed on the outer wall of the storage box 51 by welding, the inner side wall of the positioning frame 75 is welded with the annular supporting plate 76, one side of the annular supporting plate 76 is rotatably sleeved with the driving circular ring 77, part of the driving circular ring 77 is located in the displacement groove 671, the outer wall of the driving circular ring 77 is fitted and installed at the other end of the synchronous belt 74, the inner wall of the driving circular ring 77 is provided with the corrugated annular groove 78 at the central position, and the corrugated annular groove 78 and the circular rod 672 are in a matching structure, and specifically, under the action of friction, the synchronous belt 74 rotates to drive the driving circular ring 77 at the other end to rotate on the outer wall of the annular supporting plate 76, the driving circular ring 77 rotates to drive the corrugated annular groove 78 provided on the inner wall to rotate, the corrugated annular groove 78 continuously applies a horizontal extrusion force to the circular rod 672 when rotating, and the extrusion force has different directions and intensities with different rotation angles of the corrugated annular groove 78, that is, the extrusion force is transmitted to the plastering plate 69 through the circular rod 672, so that the plastering plate 69 moves left and right in the horizontal direction, and the longitudinal and transverse movement can effectively increase the surface fineness of the cement mortar during plastering, and the overall effect of plastering is better.

[0038] Reference Figure 1 The inner central position of the plastering plate 69 is provided with a leakage hole 691, the inner side wall of the leakage hole 691 towards the bottom position of the plastering plate 69 is an inclined surface, and the inclination direction is towards the fixed shell 2, and the bottom outer wall position of the plastering plate 69 is welded with a V-shaped plate 692, the V-shaped plate 692 is located directly below the leakage hole 691, and the length of the V-shaped plate 692 is greater than the length of the leakage hole 691, under the action of plastering, the excess cement mortar will slide from the leakage hole 691, and the sliding cement mortar will fall to the surface of the V-shaped plate 692 under the action of its own gravity, which is convenient for collecting excess cement mortar, reduces the waste of cement mortar, and also prevents the cement mortar from falling to the ground, which is not conducive to the subsequent construction site cleaning.

[0039] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for controlling the thickness of the inner wall plastering in decorative engineering, comprising a supporting base (1), a fixed shell (2), a track piece (3) and a supporting walking assembly (4), characterized in that: The top center position of the support base (1) is provided with a fixed shell (2), the inside of the fixed shell (2) is provided with an air compressor, and the air outlet pipe of the air compressor is exposed to the fixed shell (2), and two track pieces (3) are symmetrically arranged on the top of the fixed shell (2); The track piece (3) is welded by two equal, equal-width and different-length rectangular columns, and the end faces of the two rectangular columns are provided with rectangular plates, one of which is fixed on the top of the fixed shell (2), and the rectangular column side wall of the same track piece (3) on the outer side is provided with a tooth groove; A support walking assembly (4) is arranged between the two track pieces (3), one end of the support walking assembly (4) is provided with a storage mechanism (5) for filling cement mortar, the bottom corner of the storage mechanism (5) is provided with a thickness adjusting mechanism (6), and the top of the storage mechanism (5) is provided with a tremor mechanism (7); The thickness adjusting mechanism (6) comprises rotating shafts (61), rotating discs (62), adjusting holes (63), anti-skid pads (64), positioning bolts (65), positioning sliding blocks (66), adjusting blocks (67), positioning sliding grooves (68) and plastering plates (69), the two rotating shafts (61) are rotatably arranged on the bottom two side walls of the storage box (51), the outer wall of the rotating shaft (61) exposed to the area outside the storage box (51) is fixedly provided with a positioning pin, each rotating shaft (61) exposed to the area outside the storage box (51) is sleeved with a rotating disc (62), the inside of the rotating disc (62) is provided with an adjusting hole (63), the adjusting hole (63) is inserted with a positioning bolt (65), the positioning bolt (65) and the screw groove are a matching structure, the outer wall of the rotating disc (62) is welded with a positioning sliding block (66), the rotating disc (62) is installed below the adjusting block (67), the outer wall of the adjusting block (67) is provided with a positioning sliding groove (68) which is matched with the positioning sliding block (66) and slides, and the outer wall of the adjusting block (67) is welded with a plastering plate (69); One side of the adjusting block (67) is provided with a displacement slot (671), and one inner wall of the displacement slot (671) is welded with a round rod (672). The tremor mechanism (7) further comprises a positioning frame (75), an annular supporting plate (76), a driving circular ring (77) and a corrugated annular groove (78), the positioning frame (75) is fixed on the outer wall of the storage box (51) by welding, the inner side wall of the positioning frame (75) is welded with the annular supporting plate (76), one side of the annular supporting plate (76) is rotatably sleeved with the driving circular ring (77), part of the driving circular ring (77) is located in the displacement groove (671), the outer wall of the driving circular ring (77) is fitted and installed at the other end of the synchronous belt (74), the inner wall of the driving circular ring (77) is provided with the corrugated annular groove (78) at the central position, and the corrugated annular groove (78) and the circular rod (672) are in a matching structure; the inside of the plastering plate (69) is provided with a leakage hole (691) at the central position, the inner side wall of the leakage hole (691) towards the bottom of the plastering plate (69) is an inclined surface, and the inclination direction is towards the fixed shell (2); the bottom outer wall of the plastering plate (69) is welded with a V-shaped plate (692), the V-shaped plate (692) is located directly below the leakage hole (691), and the length of the V-shaped plate (692) is greater than that of the leakage hole (691).

2. A device for controlling the thickness of the inner wall plastering in decorative engineering according to claim 1, characterized in that: The support walking assembly (4) comprises a support plate (41) arranged between the two track members (3), the top of the support plate (41) is symmetrically provided with positioning plates (42), one end of each positioning plate (42) is independently provided with a first support shaft (43), the other end of the two positioning plates (42) is inserted with a second support shaft (45), the two ends of the first support shaft (43) and the second support shaft (45) are provided with positioning wheels (44), the two positioning wheels (44) on the same side are closely arranged on the outer wall of one of the rectangular columns, the outer wall of the second support shaft (45) and the position close to the positioning wheel (44) are fixedly provided with a driving gear (46), and the driving gear (46) is engaged with the gear groove, the top of the support plate (41) is provided with a driving motor (47) at the central position, and the output shaft of the driving motor (47) is connected with the second support shaft (45) through a belt.

3. A device for controlling the thickness of the inner wall plastering in decorative engineering according to claim 2, characterized in that: The storage mechanism (5) comprises a storage box (51) fixed on the side wall of the support plate (41) by welding, a threaded groove is formed in the bottom outer wall of the storage box (51), a jet pipe (52) is arranged at the inner wall bottom corner of the storage box (51), a connecting pipe (53) is arranged on the outer side wall of the storage box (51) close to the driving motor (47), one end of the connecting pipe (53) is connected with the jet pipe (52), the other end of the connecting pipe (53) is connected with the air outlet pipe of the air compressor, and the other corner of the inner bottom of the storage box (51) is provided with jet holes (54) at equal intervals.

4. A device for controlling the thickness of the inner wall plastering in decorative engineering according to claim 3, characterized in that: The tremor mechanism (7) comprises support arms (71), a positioning rotating shaft (72), rubber driving wheels (73) and a synchronous belt (74), the two support arms (71) are respectively and symmetrically welded on the top outer wall of the storage box (51), the positioning rotating shaft (72) is inserted between the two support arms (71), the positioning rotating shaft (72) is symmetrically provided with the rubber driving wheels (73) on the upper side, and the positioning rotating shaft (72) is provided with the synchronous belt (74) at one end.

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