Concrete vibrating device

Abstract

The invention discloses a concrete vibrating device which comprises a pull rod and a device body, the pull rod is used for pulling the device body to move, and the concrete vibrating device is characterized in that the device body comprises a vibrating mechanism, a positioning mechanism and a transmission mechanism, a vibrating lifting rod is arranged at the bottom of the vibrating mechanism, and a plurality of vibrating rods are connected to the bottom of the vibrating lifting rod; the positioning mechanism comprises a positioning rotating shaft and a positioning rotating wheel, the positioning rotating wheel is connected with a plurality of annularly-arranged positioning rotating rods, the positioning rotating shaft is connected with the vibrating mechanism through a transmission mechanism, the positioning rotating wheel rotates to drive the positioning rotating shaft to rotate, and the transmission mechanism is used for transmitting rotation of the positioning rotating shaft to the vibrating mechanism. And then the vibrating lifting rod is driven to do reciprocating lifting motion. According to the device, the vibrating mechanism, the positioning mechanism and the transmission mechanism are arranged, so that vibrating can be smoothly and uniformly carried out on a concrete construction site provided with reinforcing bars, and the vibrating efficiency and the vibrating effect are improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete, in particular to a concrete vibrating device. Background Art

[0002] Concrete vibration is a crucial step in the concrete construction process, which aims to improve the compactness and uniformity of concrete and ensure that its performance meets the design requirements. During the concrete pouring process, many bubbles and voids often appear inside the concrete. These defects will affect the strength, durability and stability of the overall structure of the concrete, making it difficult for concrete products to achieve the required performance. Therefore, the main purpose of vibration is to eliminate these bubbles and reduce the porosity of concrete, thereby enhancing its compressive strength and service life. Therefore, a vibrating device that can vibrate concrete over a large area and with high efficiency has become an important tool for concrete engineering. However, the reinforcement laid during the concrete construction process will block the vibrating device, making it difficult for a general concrete vibrating device to effectively vibrate the concrete between and under the reinforcement. If a small handheld vibrating rod is used, there is a problem of low vibration efficiency and uneven vibration. Therefore, the field of concrete technology needs to propose a concrete vibrating device that can enhance the vibration effect and improve the vibration efficiency. Summary of the invention

[0003] In view of the above-mentioned prior art, the present invention provides a concrete vibrating device, the main technical problem to be solved is how to enhance the vibration effect and improve the vibration efficiency.

[0004] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0005] A concrete vibrating device comprises a pull rod and a device body, wherein the pull rod is used to pull the device body to move, and the device body comprises a vibrating mechanism, a positioning mechanism and a transmission mechanism. A vibrating lifting rod is arranged at the bottom of the vibrating mechanism, and a plurality of vibrating rods are connected to the bottom of the vibrating lifting rod. The positioning mechanism comprises a positioning shaft and a positioning wheel, and the positioning wheel is connected to a plurality of positioning rods arranged in a ring. The positioning shaft is connected to the vibrating mechanism through the transmission mechanism, and the rotation of the positioning wheel drives the positioning shaft to rotate. The transmission mechanism is used to transmit the rotation of the positioning shaft to the vibrating mechanism, thereby driving the vibrating lifting rod to perform reciprocating lifting and lowering motion.

[0006] Preferably, the transmission mechanism includes a transmission housing, a chain transmission module and a reciprocating module, the chain transmission module includes a first sprocket, a second sprocket and a transmission chain, the reciprocating module includes a rotating disk, a reciprocating slide rail, a fan gear and a reciprocating housing, the first sprocket is fixedly connected to the positioning rotating shaft, the first sprocket is connected to the second sprocket through the transmission chain, the middle of the rotating disk is fixedly connected to the reciprocating rotating shaft, the second sprocket is fixedly connected to the reciprocating rotating shaft, the surface of the rotating disk is provided with an eccentric slider matching the reciprocating slide rail, the reciprocating slide rail is fixedly connected to the fan gear, the connection between the reciprocating slide rail and the fan gear is rotatably connected to the fulcrum rotating shaft, the fulcrum rotating shaft is fixedly connected to the reciprocating housing, and a reciprocating rack matching the fan gear is provided on the side of the vibrating lifting rod close to the fan gear, and the fan gear is meshed with the reciprocating rack.

[0007] Preferably, the reciprocating modules are symmetrically arranged on both sides of the reciprocating shaft.

[0008] Preferably, an adjustment plate is provided at the connection between the lower end of the vibrating lifting rod and the vibrating rod, and a scissors-type folding rod is provided inside the adjustment plate. The left and right sides of the scissors-type folding rod are connected to the inner side of the adjustment plate through a limiting telescopic rod. The scissors-type folding rod is a parallelogram array structure composed of a plurality of straight rods interconnected by nodes, and the vibrating rod is connected to the nodes of the scissors-type folding rod.

[0009] Preferably, sleeve sliders are provided at the nodes at the upper and lower parts of the center of the scissors-type folding rod, and a limiting sliding groove cooperating with the sleeve slider is provided in the middle of the adjustment plate. The upper sleeve slider and the lower sleeve slider are arranged with the same pitch and opposite thread direction, and a rotating threaded rod is meshedly connected inside the sleeve slider, and the upper end of the rotating threaded rod passes through the upper end of the adjustment plate and extends to the outside.

[0010] Preferably, an adjusting gear is provided inside the positioning rotating wheel, and an adjusting rack matching with the adjusting gear is provided on one side of the positioning rotating rod close to the positioning rotating wheel, and the adjusting gear is meshingly connected with the adjusting rack.

[0011] Preferably, the positioning shaft is configured as a telescopic rod structure.

[0012] Preferably, a smoothing mechanism is also provided on the front and rear sides of the device body.

[0013] Preferably, the transmission housing is rotatably connected to the positioning shaft and the reciprocating shaft, a clamping handle is provided on the side of the transmission housing away from the reciprocating shaft, and a stretching hook cooperating with the clamping handle is provided on the side of the smoothing mechanism close to the reciprocating shaft.

[0014] Preferably, the stretching hook is connected to the smoothing mechanism in a liftable manner.

[0015] The beneficial effect of the present invention is that: the present application sets the positioning mechanism so that the positioning mechanism can insert the positioning rotating rod into the grid gap formed by the reinforcement, and under the pulling of the pull rod, the positioning rotating rod is pushed by the reinforcement to drive the positioning rotating wheel to rotate, and then the arc of rotation is transmitted to the vibrating mechanism through the transmission mechanism, and the vibrating mechanism controls the vibrating lifting rod to drive the vibrating rod to perform regular reciprocating lifting and lowering motion, so that the vibrating rod is inserted and pulled out with the spacing of the reinforcement grid as a period, and the middle and lower parts of the reinforcement grid gap can be vibrated without being blocked by the reinforcement, thereby improving the vibration effect. At the same time, the fixed periodic insertion and extraction makes the vibration of the vibrating rod more uniform and comprehensive, avoiding missed vibration or over-vibration.

[0016] In summary, the present application can smoothly and evenly vibrate in a concrete construction site arranged with reinforcement by providing the vibrating mechanism, the positioning mechanism and the transmission mechanism, thereby improving the vibration efficiency and the vibration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a concrete vibrating device in an embodiment of the present application;

[0018] Figure 2 This is an enlarged view of point A in the embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the internal structure of the transmission mechanism in the embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the internal structure of the positioning device in the embodiment of the present application;

[0021] Figure 5 A cross-sectional view of an adjustment plate in an embodiment of the present application;

[0022] Figure 6 This is an enlarged view of point B in the embodiment of the present application;

[0023] Description of Figure Numbers:

[0024] 1. Pull rod; 2. Device body; 3. Vibration mechanism; 4. Positioning mechanism; 5. Transmission mechanism; 6. Smoothing mechanism;

[0025] 301, vibrating lifting rod; 302, vibrating rod; 303, adjusting plate; 304, scissor folding rod; 305, straight rod; 306, node; 307, sleeve slider; 308, limit slide groove; 309, rotating threaded rod; 310, limit telescopic rod;

[0026] 401, positioning shaft; 402, positioning wheel; 403, positioning rod; 404, adjusting gear; 405, adjusting rack; 406, turning handle;

[0027] 501, transmission housing; 502, chain transmission module; 503, reciprocating module; 504, reciprocating shaft; 505, telescopic rod structure; 506, snap-on handle; 507, stretching hook; 508, screw rod; 509, sliding block;

[0028] 511, first sprocket; 512, second sprocket; 513, transmission chain;

[0029] 521, rotating disk; 522, reciprocating slide rail; 523, sector gear; 524, reciprocating housing; 525, eccentric slider; 526, fulcrum shaft; 527, reciprocating rack;

[0030] 601. Smooth the plate; 602. Smooth the motor. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" is related to a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0032] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0033] Example 1

[0034] See attached Figure 1-6The present application provides a concrete vibrating device, comprising a pull rod 1 and a device body 2, wherein the pull rod 1 is used to pull the device body 2 to move, and the device body 2 comprises a vibrating mechanism 3, a positioning mechanism 4 and a transmission mechanism 5, a vibrating lifting rod 301 is arranged at the bottom of the vibrating mechanism 3, and a plurality of vibrating rods 302 are connected to the bottom of the vibrating lifting rod 301, the positioning mechanism 4 comprises a positioning shaft 401 and a positioning wheel 402, and the positioning wheel 402 is connected to a plurality of positioning rods 403 arranged in an annular manner, the positioning shaft 401 is connected to the vibrating mechanism 3 through the transmission mechanism 5, and the rotation of the positioning wheel 402 drives the positioning shaft 401 to rotate, and the transmission mechanism 5 is used to transmit the rotation of the positioning shaft 401 to the vibrating mechanism 3, thereby driving the vibrating lifting rod 301 to perform reciprocating lifting and lowering motion. In this embodiment, an electric eccentric motor is provided inside the vibrating rod 302 to drive the vibrating rod 302 to vibrate. It should be understood that the vibrating rod 302 can also be set to other vibrating structures commonly used in the field to make the vibrating rod 302 vibrate. The device is provided with the positioning mechanism 4, so that the positioning mechanism 4 can insert the positioning rotating rod 403 into the grid gap formed by the reinforcement, and under the pulling of the pull rod 1, the positioning rotating rod 403 is pushed by the reinforcement to drive the positioning rotating wheel 402 to rotate, and then the arc of rotation is transmitted to the vibrating mechanism 3 through the transmission mechanism 5. The vibrating mechanism 3 controls the vibrating lifting rod 301 to drive the vibrating rod 302 to perform regular reciprocating lifting motion, so that the vibrating rod 302 is inserted and pulled out with the spacing of the reinforcement grid as a period, and can vibrate the middle and lower part of the reinforcement grid gap without being blocked by the reinforcement, thereby improving the vibration effect. At the same time, the fixed periodic insertion and extraction makes the vibration of the vibrating rod 302 more uniform and comprehensive, avoiding missed vibration or over-vibration. In summary, the device can smoothly and evenly vibrate in a concrete construction site with reinforced concrete by arranging the vibrating mechanism 3, the positioning mechanism 4 and the transmission mechanism 5, thereby improving the vibration efficiency and vibration effect.

[0035] Specifically, the transmission mechanism 5 includes a transmission housing 501, a chain transmission module 502 and a reciprocating module 503, the chain transmission module 502 includes a first sprocket 511, a second sprocket 512 and a transmission chain 513, the reciprocating module 503 includes a rotating disk 521, a reciprocating slide rail 22, a sector gear 523 and a reciprocating housing 524, the first sprocket 511 is fixedly connected to the positioning shaft 401, the first sprocket 511 is connected to the second sprocket 512 through the transmission chain 513, the middle part of the rotating disk 521 is fixedly connected to the reciprocating shaft 504, the second sprocket 5 12 is fixedly connected to the reciprocating shaft 504, the surface of the rotating disk 521 is provided with an eccentric slider 525 that cooperates with the reciprocating slide rail 22, the reciprocating slide rail 22 is fixedly connected to the fan gear 523, the connection between the reciprocating slide rail 22 and the fan gear 523 is rotatably connected to the fulcrum shaft 526, the fulcrum shaft 526 is fixedly connected to the reciprocating shell 524, and a reciprocating rack 527 that cooperates with the fan gear 523 is provided on one side of the vibrating lifting rod 301 close to the fan gear 523, and the fan gear 523 is meshingly connected with the reciprocating rack 527. In this embodiment, six positioning rotating rods 403 are arranged on the positioning rotating wheel 402, and the transmission ratio of the first sprocket 511 and the second sprocket 512 is 6:1, that is, each time the positioning rotating wheel 402 is pushed by the reinforcement to rotate 60 degrees, the rotating disk 521 rotates one circle, so that the reciprocating slide rail 22 and the fan gear 523 drive the vibrating lifting rod 301 to perform a lifting movement, so that the vibrating rod 302 can be regularly inserted and pulled out of the grid formed by the reinforcement to perform the vibrating operation.

[0036] Specifically, the reciprocating modules 503 are symmetrically arranged on both sides of the reciprocating shaft 504. The reciprocating modules 503 are arranged on both sides of the reciprocating shaft 504, so that the reciprocating modules 503 on both sides can alternately drive the corresponding vibrating lifting rod 301 to rise or fall, and then drive the vibrating rod 302 to reciprocately insert and withdraw, thereby improving the vibration efficiency and vibration effect.

[0037] Specifically, an adjustment plate 303 is provided at the connection between the lower end of the vibrating lifting rod 301 and the vibrating rod 302, and a scissor-shaped folding rod 304 is provided inside the adjustment plate 303. The left and right sides of the scissor-shaped folding rod 304 are connected to the inner side of the adjustment plate 303 through a limit telescopic rod 310. The scissor-shaped folding rod 304 is a parallelogram array structure composed of a plurality of straight rods 305 connected to each other through nodes 306, and the vibrating rod 302 is connected to the nodes 306 of the scissor-shaped folding rod 304. The middle part of the vibrating rod 302 is connected to the X-shaped node 306. The extension and expansion of the scissor-shaped folding rod 304 can control the spacing between the vibrating rods 302, so that the operator can adjust the density of the vibration according to the needs of the site, while preventing the vibrating rod 302 from being blocked or stuck by the reinforcement.

[0038] Specifically, sleeve sliders 307 are provided at the nodes 306 at the upper and lower parts of the center of the scissor-fork folding rod 304, and a limiting sliding groove 308 cooperating with the sleeve slider 307 is provided at the middle part of the adjustment plate 303. The upper sleeve slider 307 and the lower sleeve slider 307 are set to have the same pitch and opposite thread directions. A rotating threaded rod 309 is meshed and connected inside the sleeve slider 307, and the upper end of the rotating threaded rod 309 extends to the outside through the upper end of the adjustment plate 303. The upper sleeve is connected to the inverted V-shaped node 306, and the lower sleeve slider 307 is connected to the V-shaped node 306. The rotation of the rotating threaded rod 309 can simultaneously push the upper sleeve slider 307 and the lower sleeve slider 307 to move up and down in opposite directions, thereby extending and unfolding the scissor-fork folding rod 304 to control the spacing between the vibrating rods 302, making the adjustment operation more convenient.

[0039] Specifically, an adjusting gear 404 is provided inside the positioning wheel 402, and an adjusting rack 405 cooperating with the adjusting gear 404 is provided on one side of the positioning rod 403 close to the positioning wheel 402, and the adjusting gear 404 is meshedly connected with the adjusting rack 405. The rotation of the adjusting gear 404 can simultaneously drive all the positioning rods 403 to extend or retract synchronously, so that the positioning rods 403 can be adjusted according to different reinforcement gap sizes through the turning handle 406, thereby improving the reliability of the device.

[0040] Specifically, the positioning shaft 401 is configured as a telescopic rod structure 505. The telescopic rod structure 505 enables the position of the positioning wheel 402 to be adjusted, thereby preventing the positioning rod 403 from being stuck by reinforcement, and further improving the reliability of the device.

[0041] Example 2

[0042] See attached Figure 1-6 The difference between this embodiment and embodiment 1 is that a smoothing mechanism 6 is further provided on the front and rear sides of the device body 2. The pull rod 1 is arranged to be rotatably connected to the device body 2, and the smoothing mechanism 6 includes a smoothing plate 601 and a smoothing vibration motor. The smoothing plate 601 is arranged to be a plate-like structure that is completely symmetrical in front and back and left and right. The smoothing mechanism 6 can smooth the area where the vibration is completed while the vibrating mechanism 3 is working, so that the concrete vibration work and the smoothing work are carried out at the same time, thereby improving efficiency. The smoothing mechanism 6 is symmetrically arranged on the front and rear sides, so that the device can move forward or backward, and the smoothing mechanism 6 can conveniently change direction and turn around.

[0043] Specifically, the transmission housing 501 is rotatably connected to the positioning shaft 401 and the reciprocating shaft 504. A snap-on handle 506 is provided on the side of the transmission housing 501 away from the reciprocating shaft 504. A stretching hook 507 cooperating with the snap-on handle 506 is provided on the side of the smoothing mechanism 6 close to the reciprocating shaft 504. The transmission housing 501 and the reciprocating shaft 504 are configured to be rotatably connected to the reciprocating shaft 504, so that the transmission housing 501 can drive the entire transmission mechanism 5 and the positioning mechanism 4 to rotate around the reciprocating shaft 504, thereby enabling the orientation of the positioning mechanism 4 to be adjusted according to the moving direction of the device, so that the positioning mechanism 4 is located in the concrete area that has not been vibrated by the vibrating mechanism 3, thereby preventing the positioning mechanism 4 from being inserted into and stirring the concrete that has been vibrated, resulting in the generation of additional bubbles. At the same time, a spring telescopic structure is provided inside the stretching hook 507, so that the hook can be conveniently pulled out to connect with the connecting handle, and the adjusted transmission housing 501 and the positioning mechanism 4 are fixed, and the operation is convenient and quick.

[0044] Specifically, the stretching hook 507 is connected to the smoothing mechanism 6 in a liftable manner. In this embodiment, the stretching hook 507 controls the lifting and lowering of the stretching hook 507 through a screw rod 508 and a sliding block 509 with a thread. The stretching hook 507 can be conveniently lifted and lowered, so that the height of the positioning mechanism 4 can be conveniently adjusted to cooperate with the rotation of the positioning mechanism 4 and the extension and contraction of the positioning rotating rod 403, making the device more reliable.

[0045] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. The protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A concrete vibrating device, comprising a pull rod (1) and a device body (2), wherein the pull rod (1) is used to pull the device body (2) to move, and is characterized in that: The device body (2) comprises a vibrating mechanism (3), a positioning mechanism (4) and a transmission mechanism (5); a vibrating lifting rod (301) is arranged at the bottom of the vibrating mechanism (3); a plurality of vibrating rods (302) are connected to the bottom of the vibrating lifting rod (301); the positioning mechanism (4) comprises a positioning rotating shaft (401) and a positioning rotating wheel (402); the positioning rotating wheel (402) is connected to a plurality of positioning rotating rods (403) arranged in a ring; the positioning rotating shaft (401) is connected to the vibrating mechanism (3) through the transmission mechanism (5); the rotation of the positioning rotating wheel (402) drives the positioning rotating shaft (401) to rotate; the transmission mechanism (5) is used to transmit the rotation of the positioning rotating shaft (401) to the vibrating mechanism (3), thereby driving the vibrating lifting rod (301) to perform a reciprocating lifting motion.

2. A concrete vibrating device according to claim 1, characterized in that: The transmission mechanism (5) comprises a transmission housing (501), a chain transmission module (502) and a reciprocating module (503); the chain transmission module (502) comprises a first sprocket (511), a second sprocket (512) and a transmission chain (513); the reciprocating module (503) comprises a rotating disk (521), a reciprocating slide rail (22), a sector gear (523) and a reciprocating housing (524); the first sprocket (511) is fixedly connected to the positioning shaft (401); the first sprocket (511) is connected to the second sprocket (512) via the transmission chain (513); the middle of the rotating disk (521) is fixedly connected to the reciprocating shaft (504); the second sprocket (512) is fixedly connected to the positioning shaft (401); the second sprocket (512) is fixedly connected to the positioning shaft (401); the first sprocket (511) is connected to the second sprocket (512) via the transmission chain (513); the middle of the rotating disk (521) is fixedly connected to the reciprocating shaft (504); the second sprocket (512) is fixedly connected to the positioning shaft (401); the first sprocket (511) is fixedly connected to the positioning shaft (401 ... 512) is fixedly connected to the reciprocating shaft (504), the surface of the rotating disk (521) is provided with an eccentric slider (525) cooperating with the reciprocating slide rail (22), the reciprocating slide rail (22) is fixedly connected to the fan gear (523), the connection between the reciprocating slide rail (22) and the fan gear (523) is rotatably connected to the fulcrum shaft (526), ​​the fulcrum shaft (526) is fixedly connected to the reciprocating shell (524), and a reciprocating rack (527) cooperating with the fan gear (523) is provided on one side of the vibrating lifting rod (301) close to the fan gear (523), and the fan gear (523) is meshingly connected with the reciprocating rack (527).

3. A concrete vibrating device according to claim 1, characterized in that: The reciprocating modules (503) are centrally symmetrically arranged on both sides of the reciprocating shaft (504).

4. A concrete vibrating device according to claim 2, characterized in that: An adjustment plate (303) is provided at the connection between the lower end of the vibrating lifting rod (301) and the vibrating rod (302), and a scissors-type folding rod (304) is provided inside the adjustment plate (303). The left and right sides of the scissors-type folding rod (304) are connected to the inner side of the adjustment plate (303) through a limiting telescopic rod (310). The scissors-type folding rod (304) is a parallelogram array structure composed of a plurality of straight rods (305) interconnected through nodes (306), and the vibrating rod (302) is connected to the nodes (306) of the scissors-type folding rod (304).

5. A concrete vibrating device according to claim 4, characterized in that: Sleeve sliders (307) are provided at the nodes (306) at the upper and lower parts of the center of the scissor-type folding rod (304), and a limiting sliding groove (308) cooperating with the sleeve slider (307) is provided in the middle of the adjustment plate (303). The upper sleeve slider (307) and the lower sleeve slider (307) are arranged with the same pitch and opposite thread directions, and a rotating threaded rod (309) is meshedly connected inside the sleeve slider (307), and the upper end of the rotating threaded rod (309) passes through the upper end of the adjustment plate (303) and extends to the outside.

6. A concrete vibrating device according to claim 5, characterized in that: An adjusting gear (404) is arranged inside the positioning rotating wheel (402), and an adjusting rack (405) cooperating with the adjusting gear (404) is arranged on one side of the positioning rotating rod (403) close to the positioning rotating wheel (402), and the adjusting gear (404) is meshedly connected with the adjusting rack (405).

7. A concrete vibrating device according to claim 6, characterized in that: The positioning shaft (401) is configured as a telescopic rod structure (505).

8. A concrete vibrating device according to claim 2, characterized in that: The front and rear sides of the device body (2) are also provided with smoothing mechanisms (6).

9. A concrete vibrating device according to claim 7, characterized in that: The transmission housing (501) is rotatably connected to the positioning shaft (401) and the reciprocating shaft (504); a clamping handle (506) is provided on the side of the transmission housing (501) away from the reciprocating shaft (504); and a stretching hook (507) cooperating with the clamping handle (506) is provided on the side of the smoothing mechanism (6) close to the reciprocating shaft (504).

10. A concrete vibrating device according to claim 9, characterized in that: The stretching hook (507) is connected to the smoothing mechanism (6) in a liftable manner.

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