Aerated concrete thin layer masonry device

Abstract

The utility model discloses an aerated concrete thin-layer masonry device, belongs to the technical field of aerated concrete thin-layer masonry devices, and solves the problems that time and labor are wasted as the number of times of movement is large and the uncertainty of spraying stability is easily caused in the moving process in the prior art. And the flatness of the movable spraying position is poor. The spraying box is arranged on the moving frame, the spraying head is connected with the spraying box and provided with a communicating pipe, the spraying mechanism is connected with the spraying box, the spraying mechanism comprises two lifting mechanisms, a horizontal driving frame and a vertical driving frame, the horizontal driving frame is arranged on the lifting mechanisms and driven by the lifting mechanisms to ascend and descend, and the vertical driving frame is arranged on the horizontal driving frame and driven by the lifting mechanisms to ascend and descend. The rotating mechanism horizontally moves along the horizontal driving frame; and the nozzle mounting frame is arranged on the rotating mechanism and is used for adjusting the angle of the nozzle. The aerated concrete thin-layer building device is used for aerated concrete thin-layer building.

Description

Technical Field

[0001] The invention discloses an aerated concrete thin layer masonry device, which is used for aerated concrete thin layer masonry and belongs to the technical field of aerated concrete thin layer masonry devices. Background Art

[0002] Aerated concrete thin-layer masonry refers to a construction technology that uses autoclaved aerated concrete blocks and special adhesives for construction. Autoclaved aerated concrete blocks are a lightweight and porous building material, mainly made of siliceous materials (such as sand, fly ash, etc.) and calcium materials (such as lime, cement), mixed with gas-generating agents (such as aluminum powder) and then autoclaved and cured. This material has the advantages of light weight, fire resistance, sound insulation, heat preservation, impermeability, earthquake resistance, environmental protection, durability and fastness.

[0003] The thin layer of aerated concrete used in building masonry has good thermal insulation properties, which can effectively reduce heat transfer, improve the energy efficiency of buildings, and reduce the energy consumption of heating and air conditioning. The thin layer of aerated concrete can reduce the overall weight of the building due to its lightweight and porous characteristics, which has a positive impact on the building structure design and load-bearing capacity. The use of an aerated concrete thin layer masonry device for thin layer masonry simplifies the construction process, reduces the amount of mortar used, speeds up the construction speed, and improves work efficiency. Although the aerated concrete thin layer masonry device in the prior art can achieve paint coverage at various locations by moving the frame, etc., it has the following technical problems:

[0004] A large number of movements increases the uncertainty of spraying stability caused by the moving process. Therefore, it is not only easy to cause time-consuming and labor-intensive problems, but also easy to cause the problem of poor flatness at the moving spraying position. Utility Model Content

[0005] The utility model aims to provide an aerated concrete thin-layer masonry device to solve the problem that the existing device has a large number of movements, which increases the uncertainty of spraying stability caused by the moving process. Therefore, it is not only easy to cause time-consuming and labor-intensive problems, but also easy to cause the problem of poor flatness at the moving spraying position.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An aerated concrete thin-layer masonry device comprises a movable frame, a spraying box arranged on the movable frame, a spray head with a connecting pipe connected to the spraying box, and a spraying mechanism connected to the spraying box, wherein the spraying mechanism comprises two lifting mechanisms, a horizontal driving frame arranged on the lifting mechanism and driven to be lifted and lowered by the lifting mechanism, a rotating mechanism arranged on the horizontal driving frame and moving horizontally along the horizontal driving frame, and a spray head mounting frame arranged on the rotating mechanism and adjusting the angle of the spray head.

[0008] Furthermore, the nozzle mounting frame includes an inverted L-shaped frame relatively arranged on the rotating mechanism, the inverted L-shaped frame includes a vertical frame arranged on the rotating mechanism, a horizontal frame connected to the vertical frame, a hollow column is rotatably arranged on the horizontal frames of the two inverted L-shaped frames, a clamping piece for clamping the nozzle is arranged on the hollow column, and a telescopic mechanism is arranged on the rotating mechanism and connected to the hollow column to drive the hollow column to rotate along the horizontal frame of the inverted L-shaped frame.

[0009] Furthermore, the bottom of the hollow column has a T-shaped slide groove;

[0010] The telescopic mechanism includes a T-shaped slider that slides with the T-shaped slide groove, a connecting block A correspondingly arranged on the bottom of the T-shaped slider, a rotating shaft arranged on the connecting block A, and an electric telescopic rod arranged on the rotating mechanism and connected to the rotating shaft.

[0011] Furthermore, a through hole is relatively arranged on the hollow column, and an internal thread column is arranged at the through hole;

[0012] The clamping member includes a bolt that cooperates with the internal threaded column.

[0013] Furthermore, the lifting mechanism includes a lower mounting plate arranged on the movable frame, two sliding bars arranged on the lower mounting plate and an upper mounting plate arranged on the two-phase sliding bars, a rotating motor A arranged on the upper mounting plate, and a screw A arranged between the two sliding bars and cooperating with the lower mounting plate for rotation and passing through the upper mounting plate to be connected to the rotating motor A.

[0014] Furthermore, the horizontal driving frame includes a connecting block B that is slidably matched with the sliding rod and threadably matched with the screw A, a screw B that is rotatably set on one connecting block B and passes through another connecting block B, and a limiting rod that is fixedly set on the two connecting blocks B. A rotating motor B that drives the screw B to rotate is set on the connecting block B that passes through the screw B.

[0015] Furthermore, the rotating mechanism includes a moving plate that is slidably matched with the limiting rod and is threadably matched with the screw rod B, a motor disposed on the moving plate, and a rotating plate disposed on the motor.

[0016] Further, the motor is arranged at the center of the moving plate.

[0017] The movable plate is provided with a plurality of support columns, and the support columns are provided with balls matched with the rotating plate.

[0018] Compared with the prior art, the advantages of the utility model are:

[0019] First, the utility model provides two lifting mechanisms, and a horizontal driving frame is provided on the two lifting mechanisms, so that the nozzle can be accurately moved in the vertical and horizontal directions, thereby achieving uniform spraying of the wall surface, improving the flatness of the wall surface and the spraying quality, and the rotating mechanism and the nozzle mounting frame can adjust the angle of the nozzle to adapt to different construction conditions, maintain the stability of the spraying, and improve the spraying efficiency and spraying effect, that is, avoiding the problem of uncertainty in spraying stability caused by increasing the number of moving the moving frame;

[0020] Second, the nozzle mounting frame in the utility model adjusts the rotation direction and angle of the nozzle by driving the hollow column and the two inverted L-shaped frames to rotate through the telescopic mechanism to adapt to different construction requirements, such as corners, edges and other areas that are difficult to construct;

[0021] 3. The cooperation of the T-shaped slide groove and the T-shaped slider in the utility model is to facilitate the electric telescopic rod to extend and retract, and the T-shaped slider can slide in the T-shaped slide groove while rotating and cooperating with the electric telescopic rod to adjust the angle, so as to achieve precise control of the position of the nozzle, ensure the accuracy of spraying and the flatness of the wall;

[0022] Fourth, the utility model can quickly and conveniently install and remove the nozzle through the cooperation of the internal thread column and the bolt, which improves the efficiency of nozzle replacement during the construction process and ensures that the nozzle will not move due to vibration during the construction process, thereby ensuring the stability of spraying;

[0023] 5. The lifting mechanism in the utility model realizes the vertical precise movement of the nozzle system through two slide bars and upper and lower mounting plates. The screw rod A cooperates with the rotation of the lower mounting plate and is controlled by the rotating motor A, which ensures the stability of the lifting process, reduces the shaking of the nozzle during the lifting process, and improves the spraying quality;

[0024] Sixth, the horizontal driving frame in the utility model can realize the precise horizontal movement of the nozzle system by slidingly cooperating with the connecting block B and the sliding rod, and cooperating with the screw B thread. The screw B cooperates with the connecting block B thread and is controlled by the rotating motor B, which ensures the stability of the horizontal movement, reduces the shaking of the nozzle during the horizontal movement, and also improves the spraying quality;

[0025] 7. After the rotating mechanism in the utility model is moved to the designated position through the lifting mechanism and the horizontal driving frame, the rotating direction of the nozzle can be adjusted by the motor-driven rotating plate to quickly adjust the angle of the nozzle, thereby reducing the pause time during the construction process and improving the overall construction efficiency;

[0026] 8. The multiple support columns in the utility model increase the support points of the moving plate, and reduce the rotational friction by cooperating with the rotating plate through the ball bearings, so as to improve the overall stability of the structure and reduce the shaking that may occur during the rotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the mobile frame in the utility model;

[0030] Figure 3 It is a structural schematic diagram of the lifting mechanism in the utility model;

[0031] Figure 4 It is a structural schematic diagram of the horizontal driving frame in the utility model;

[0032] Figure 5 It is a structural schematic diagram of the rotating mechanism in the utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the nozzle mounting frame in the utility model;

[0034] Figure 7 for Figure 6 A partial cross-sectional view of

[0035] In the figure: 1-movable frame, 2-spray box, 3-spray head, 4-spraying mechanism, 5-lifting mechanism, 6-horizontal driving frame, 7-rotating mechanism, 8-spray head mounting frame, 9-inverted L-shaped frame, 10-vertical frame, 11-horizontal frame, 12-hollow column, 13-clamping piece, 14-telescopic mechanism, 15-T-type slide groove, 16-T-type slider, 17-connecting block A, 18-rotating shaft, 19-electric telescopic rod, 20-through hole, 21-internal thread column, 22-lower mounting plate, 23-slide rod, 24-upper mounting plate, 25-rotating motor A, 26-screw A, 27-connecting block B, 28-screw B, 29-limiting rod, 30-rotating motor B, 31-movable plate, 32-motor, 33-rotating plate, 34-support column, 35-ball. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0039] In addition, the terms “first”, “second”, “third”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connection", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0043] Example 1

[0044] In order to solve the problem of the existing technology that the number of movements is large, the movement process is increased, which is easy to cause uncertainty in the spraying stability. Therefore, it is not only easy to cause time-consuming and labor-intensive problems, but also easy to cause the problem of poor flatness at the moving spraying position. Figure 1-7 The figure shows an aerated concrete thin layer masonry device, comprising a movable frame 1, a spray box 2 arranged on the movable frame 1 and a nozzle 3 with a connecting pipe connected to the spray box 2, and a spraying mechanism 4 connected to the spray box 2, the spraying mechanism 4 comprising two lifting mechanisms 5, a horizontal driving frame 6 arranged on the lifting mechanism 5 and driven to rise and fall by the lifting mechanism 5, a rotating mechanism 7 arranged on the horizontal driving frame 6 and moving horizontally along the horizontal driving frame 6, and a nozzle mounting frame 8 arranged on the rotating mechanism 7 for adjusting the angle of the nozzle.

[0045] In practice, when it is necessary to carry out thin-layer masonry of aerated concrete, spraying material is added from the entrance of the spraying box 2, and the spraying mechanism 4 and the spraying box 2 are moved to the designated position by the mobile frame 1. After moving to the designated position, the angle of the spraying head can be adjusted by the rotating mechanism and the nozzle mounting frame 8. After adjustment, the feed pump is turned on to make the spraying material in the spraying box 2 spray out from the nozzle 3. At the same time, the horizontal driving frame 6 can be controlled to drive the nozzle mounting frame 8 and the nozzle on the rotating mechanism to move horizontally, and the nozzle mounting frame 8 and the nozzle on the lifting mechanism 5 can be controlled to move vertically. In practice, spraying is carried out in a horizontal, vertical, and horizontal moving manner, or in a vertical, horizontal, and vertical moving manner. During the spraying process, the rotating mechanism and the nozzle mounting frame 8 can also be adjusted synchronously to adjust the angle of the nozzle. In this embodiment, two lifting mechanisms are arranged, and a horizontal driving frame is arranged on the two lifting mechanisms, so that the nozzle can be accurately moved in the vertical and horizontal directions, thereby achieving uniform spraying of the wall surface, improving the flatness of the wall surface and the spraying quality, and the rotating mechanism and the nozzle mounting frame can adjust the angle of the nozzle to adapt to different construction conditions, and can maintain the stability of the spraying, while improving the spraying efficiency and spraying effect, that is, avoiding the problem of uncertainty in spraying stability caused by increasing the number of times the moving frame is moved.

[0046] Example 2

[0047] On the basis of Example 1, the nozzle mounting frame 8 includes an inverted L-shaped frame 9 relatively arranged on the rotating mechanism 7, the inverted L-shaped frame 9 includes a vertical frame 10 arranged on the rotating mechanism 7, a horizontal frame 11 connected to the vertical frame 10, and a hollow column 12 (such as Figure 7 As shown, the rotation is coordinated by means of a limit groove and a limit rod. Of course, other methods can also be used for rotation coordination). The hollow column 12 is provided with a clamping part 13 for clamping the nozzle, and a telescopic mechanism 14 is provided on the rotating mechanism 7 and connected to the hollow column 12 to drive the hollow column 12 to rotate along the horizontal frame 11 of the inverted L-shaped frame 9.

[0048] In practice, when the nozzle mounted on the hollow column 12 by the clamping member needs to be adjusted by the nozzle mounting frame 8, the hollow column 12 and the inverted L-shaped frame 9 are driven to rotate and cooperate by the telescopic mechanism 14 to make the nozzle tilt upward or downward. The nozzle mounting frame in this embodiment drives the hollow column and the two inverted L-shaped frames to rotate and cooperate to adjust the rotation direction and angle of the nozzle by the telescopic mechanism, which can adapt to different construction requirements, such as corners, edges and other areas that are difficult to construct.

[0049] Example 3

[0050] On the basis of Example 2, the bottom of the hollow column 12 has a T-shaped slot 15; the telescopic mechanism 14 includes a T-shaped slider 16 slidably matched with the T-shaped slot 15, a connecting block A17 correspondingly arranged on the bottom of the T-shaped slider 16, a rotating shaft 18 arranged on the connecting block A17, and an electric telescopic rod 19 arranged on the rotating mechanism and connected to the rotating shaft 18. The length of the T-shaped slot 15 is set according to practical needs.

[0051] In practice, when the electric telescopic rod 19 is extended or contracted, one end of the hollow column 12 is pushed upward and the other end is pushed downward. At this time, the electric telescopic rod is hingedly connected with the connecting block A17, that is, the electric telescopic rod is rotated with the rotating shaft, and the T-shaped slider 16 is slidably matched with the T-shaped slide groove 15 to achieve precise control of the nozzle position, so as to ensure the accuracy of spraying and the flatness of the wall. Of course, in practice, the non-queuing telescopic mechanism can also be other structures.

[0052] Example 4

[0053] On the basis of Example 3, a through hole 20 is relatively provided on the hollow column 12, and an internal thread column 21 is provided at the through hole 20; the clamping member 13 includes a bolt that cooperates with the internal thread column 21. In practice, the nozzle is inserted into the hollow column, and the nozzle is fixed by rotating the bolt to cooperate with the internal thread column. In this embodiment, the nozzle can be quickly and conveniently installed and disassembled by cooperating with the internal thread column and the bolt, which improves the efficiency of nozzle replacement during the construction process, and can ensure that the nozzle will not move due to vibration during the construction process, thereby ensuring the stability of the spraying. Of course, the clamping structure can also be other structures, and can also include other clamping components, such as a rubber pad provided at the contact end with the nozzle.

[0054] Example 5

[0055] On the basis of Example 4, the lifting mechanism 5 includes a lower mounting plate 22 arranged on the mobile frame 1, two slide bars 23 arranged on the lower mounting plate 22 and an upper mounting plate 24 arranged on the two-phase slide bars 23, a rotating motor A25 arranged on the upper mounting plate 24, and a screw rod A26 arranged between the two slide bars 23 and matched with the rotation of the lower mounting plate 22 and passing through the upper mounting plate 24 and connected to the rotating motor A25. In practice, when lifting is required, the screw rod A26 is driven to rotate in a forward or reverse direction by the rotating motor A25 to drive the horizontal driving frame 6 to move up and down. The lifting mechanism in this embodiment realizes the vertical precise movement of the nozzle system through two slide bars and upper and lower mounting plates. The screw rod A is matched with the rotation of the lower mounting plate and is controlled by the rotating motor A, which ensures the stability of the lifting process, reduces the shaking of the nozzle during the lifting process, and improves the spraying quality.

[0056] Example 6

[0057] On the basis of Example 5, the horizontal driving frame 6 includes a connecting block B27 that is slidably matched with the slide bar 23 and is threadedly matched with the screw A26, a screw B28 that is rotatably set on one connecting block B27 and penetrated on the other connecting block B27, and a limit rod 29 that is fixedly set on the two connecting blocks B27. A rotating motor B30 that drives the screw B28 to rotate is set on the connecting block B27 through which the screw B28 is penetrated. In practice, the rotating mechanism 7 is driven to reciprocate horizontally by driving the screw B28 forward or reversely by the rotating motor B30. The horizontal driving frame in this embodiment can realize the precise horizontal movement of the nozzle system by slidingly matching with the slide bar through the connecting block B and matching with the screw B thread. The screw B matches with the connecting block B thread and is controlled by the rotating motor B, which ensures the stability of the horizontal movement, reduces the shaking of the nozzle during the horizontal movement, and also improves the spraying quality.

[0058] Example 7

[0059] On the basis of Example 6, the rotating mechanism 7 includes a moving plate 31 that is slidably matched with the limiting rod 29 and is threadedly matched with the screw rod B28, a motor 32 disposed on the moving plate 31, and a rotating plate 33 disposed on the motor 32. The moving plate 31 thereon is driven to rotate by the forward or reverse rotation of the motor 32. After the rotating mechanism in this embodiment is moved to a specified position through the lifting mechanism and the horizontal driving frame, the rotating plate can be driven by the motor to rotate and adjust the rotation direction of the nozzle, so as to quickly adjust the angle of the nozzle, reduce the pause time during the construction process, and improve the overall construction efficiency.

[0060] Example 8

[0061] On the basis of Example 7, the motor 32 is arranged at the center of the moving plate 31. The moving plate 31 is provided with a plurality of support columns 34, and the support columns 34 are provided with balls 35 that are slidably matched with the rotating plate 33. The plurality of support columns increase the support points of the moving plate, and the balls are matched with the rotating plate to reduce the rotation friction, so as to improve the overall stability of the structure, reduce the shaking that may occur during the rotation process, and avoid the problem that the motor is subjected to stress and is easy to be damaged.

Claims

1. An aerated concrete thin-layer masonry device, comprising a mobile frame (1), a spray box (2) arranged on the mobile frame (1), a spray head (3) with a connecting pipe connected to the spray box (2), and a spraying mechanism (4) connected to the spray box (2), characterized in that: The spraying mechanism (4) comprises two lifting mechanisms (5), a horizontal driving frame (6) arranged on the lifting mechanisms (5) and driven to rise and fall by the lifting mechanisms (5), a rotating mechanism (7) arranged on the horizontal driving frame (6) and moving horizontally along the horizontal driving frame (6), and a spray head mounting frame (8) arranged on the rotating mechanism (7) and adjusting the angle of the spray head.

2. The aerated concrete thin layer masonry device according to claim 1, characterized in that: The nozzle mounting frame (8) comprises an inverted L-shaped frame (9) arranged relatively on the rotating mechanism (7), the inverted L-shaped frame (9) comprising a vertical frame (10) arranged on the rotating mechanism (7), a horizontal frame (11) connected to the vertical frame (10), a hollow column (12) rotatably arranged on the horizontal frames (11) of the two inverted L-shaped frames (9), a clamping piece (13) for clamping the nozzle is arranged on the hollow column (12), and a telescopic mechanism (14) is arranged on the rotating mechanism (7) and connected to the hollow column (12) to drive the hollow column (12) to rotate along the horizontal frame (11) of the inverted L-shaped frame (9).

3. The aerated concrete thin layer masonry device according to claim 2, characterized in that: The bottom of the hollow column (12) is provided with a T-shaped slide groove (15); The telescopic mechanism (14) comprises a T-shaped slider (16) slidably matched with the T-shaped slide groove (15), a connecting block A (17) correspondingly arranged on the bottom of the T-shaped slider (16), a rotating shaft (18) arranged on the connecting block A (17), and an electric telescopic rod (19) arranged on the rotating mechanism and connected to the rotating shaft (18).

4. The aerated concrete thin layer masonry device according to claim 3, characterized in that: A through hole (20) is disposed on the hollow column (12), and an internal thread column (21) is disposed at the through hole (20); The clamping member (13) comprises a bolt matched with the internal thread column (21).

5. The aerated concrete thin layer masonry device according to claim 1, characterized in that: The lifting mechanism (5) comprises a lower mounting plate (22) arranged on the moving frame (1), two sliding bars (23) arranged on the lower mounting plate (22) and an upper mounting plate (24) arranged on the two-phase sliding bars (23), a rotating motor A (25) arranged on the upper mounting plate (24), and a screw rod A (26) arranged between the two sliding bars (23) and rotatingly cooperating with the lower mounting plate (22) and passing through the upper mounting plate (24) and connected to the rotating motor A (25).

6. The aerated concrete thin layer masonry device according to claim 5, characterized in that: The horizontal driving frame (6) comprises a connecting block B (27) which is slidably matched with the sliding rod (23) and threadably matched with the screw rod A (26), a screw rod B (28) which is rotatably arranged on one connecting block B (27) and penetrates the other connecting block B (27), and a limiting rod (29) which is fixedly arranged on the two connecting blocks B (27); a rotating motor B (30) which drives the screw rod B (28) to rotate is arranged on the connecting block B (27) through which the screw rod B (28) is penetrated.

7. The aerated concrete thin layer masonry device according to claim 6, characterized in that: The rotating mechanism (7) comprises a moving plate (31) which is slidably matched with the limiting rod (29) and threadedly matched with the screw rod B (28), a motor (32) arranged on the moving plate (31), and a rotating plate (33) arranged on the motor (32).

8. The aerated concrete thin layer masonry device according to claim 7, characterized in that: The motor (32) is arranged at the center of the moving plate (31); The movable plate (31) is provided with a plurality of support columns (34), and the support columns (34) are provided with rolling balls (35) which are slidably matched with the rotating plate (33).

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