Light prefabricated wall with multiple thermal and sound insulation structure

Abstract

The present application relates to a kind of lightweight prefabricated wall with multiple heat preservation sound insulation structure.The technical scheme includes: first prefabricated wallboard, sound-absorbing box and heat insulation cotton, the rear end of first prefabricated wallboard is provided with second prefabricated wallboard, sound-absorbing box is slidably installed in second prefabricated wallboard, and sound-absorbing box is fixedly connected with sound-absorbing frame.The present application is provided with the mutual cooperation between conical sound-absorbing cotton, sound-absorbing hole, sound-absorbing box, sound-absorbing frame and hollow tube, which can more conveniently absorb the sound inside by conical sound-absorbing cotton, and conveniently absorb noise.The sound-absorbing box is installed between first prefabricated wallboard and second prefabricated wallboard, noise is absorbed by sound-absorbing frame, the gap between sound-absorbing frame and sound-absorbing box is kept larger, noise can be absorbed by sound-absorbing frame, and the inside can be conveniently sound-absorbed by frame plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prefabricated walls, in particular to a lightweight prefabricated wall with multiple heat preservation and sound insulation structures. BACKGROUND

[0002] The prefabricated fence is composed of cement fence plates, and is a temporary engineering fence made of new wall materials such as magnesium chloride, perlite, sand, cement, etc. according to scientific proportioning and special production process. It is not only beautiful in shape, green and environmentally friendly, but also convenient to construct and low in cost. It has become the most ideal substitute for clay bricks and concrete fences, and can be widely used in various construction engineering fields such as construction sites, urban construction, environmental beautification, industrial technological transformation, etc. The reinforced concrete slab type component is processed in a prefabrication plant or a construction site for building assembly. The prefabricated concrete wall plate is used to build a prefabricated large plate building, which can improve the degree of factory production and mechanization, reduce on-site wet work, save on-site labor, overcome seasonal influences, shorten the construction period, and the prefabricated plate is a floor used in early buildings. The existing prefabricated wall plate structure has poor heat preservation effect in use. In summer, the scorching temperature is conducted to the indoor through sunlight, which makes the indoor temperature rise. At the same time, the indoor temperature is easily absorbed in winter, which makes the indoor temperature decrease, forming a winter-cold and summer-hot environment, so that the internal temperature is not convenient to control. Therefore, a lightweight prefabricated wall with multiple heat preservation and sound insulation structures is needed.

[0003] After searching, patent publication No. CN210342416U discloses a prefabricated wall plate. The prefabricated wall plate comprises a cast wall body and a steel reinforcement framework net. The cast wall body is provided with side edge grooves on both sides. The cast wall body is reinforced by a side ear steel reinforcement net structure extending from both sides of the lower part of the cast wall body. The side ear steel reinforcement net structure comprises upper and lower support bars. A plurality of balance reinforcing bars are arranged between the upper and lower support bars. One end of each of the upper and lower support bars and the balance reinforcing bars is fixed to the steel reinforcement framework net. The present application has simple structure, multiple functions and good practicability. In the prior art, the prefabricated wall plate structure has poor heat preservation effect in use. In summer, the scorching temperature is conducted to the indoor through sunlight, which makes the indoor temperature rise. At the same time, the indoor temperature is easily absorbed in winter, which makes the indoor temperature decrease, forming a winter-cold and summer-hot environment, so that the internal temperature is not convenient to control. At the same time, the existing prefabricated wall cannot effectively insulate sound. The existing external wall on the market has the problem of poor sound insulation effect, which leads to insufficient stability and poor sound insulation effect. In view of this, we propose a lightweight prefabricated wall with multiple heat preservation and sound insulation structures to solve the existing problems. SUMMARY

[0004] The present application aims to provide a lightweight prefabricated wall with multiple heat and sound insulation structures to solve the problems raised in the background art.

[0005] To achieve the above object, the present application provides the following technical solutions:

[0006] A lightweight prefabricated wall with multiple heat and sound insulation structures comprises a first prefabricated wallboard, a sound-absorbing box and heat insulation cotton, the rear end of the first prefabricated wallboard is provided with a second prefabricated wallboard, the sound-absorbing box is slidably installed in the second prefabricated wallboard, the sound-absorbing box is fixedly connected with a sound-absorbing frame, the rear end of the first prefabricated wallboard is fixedly connected with the heat insulation cotton, the rear end of the heat insulation cotton is fixedly connected with a mesh cloth, the rear end of the mesh cloth is fixedly connected with a mounting rod, the mounting rod is slidably installed with a limiting block inside, the inner side of the second prefabricated wallboard is fixedly connected with a mounting groove, the mounting groove is slidably installed with a sliding plate inside, the inner side of the sliding plate is fixedly connected with a spherical block, and the inner side of the first prefabricated wallboard is fixedly connected with a limiting plate.

[0007] The sound inside can be conveniently absorbed by the conical sound-absorbing cotton, and the noise can be conveniently absorbed. The sound-absorbing box is installed between the first prefabricated wallboard and the second prefabricated wallboard by sliding the sliding block along the first sliding groove and the second sliding groove, the noise is absorbed by the sound-absorbing frame, the sound-absorbing frame and the sound-absorbing box are conveniently supported by the hollow pipe, the sound-absorbing frame can be installed in the sound-absorbing box, a large gap is maintained between the sound-absorbing frame and the sound-absorbing box, and the noise can be absorbed by the sound-absorbing frame. The interior can be conveniently sound-absorbed by the frame plate.

[0008] Preferably, the mounting groove and the sliding plate are slidably connected through the movable block, and the inner side of the mounting groove is provided with a moving groove matched with the movable block. The sliding plate is slid along the inside of the mounting groove by extruding the spherical block between the limiting plate and the spherical block, the movable block is moved along the inside of the moving groove, and the sliding plate is slid outward to conveniently extrude the compression spring.

[0009] Preferably, the mounting groove and the sliding plate are movably connected through the compression spring, and the outer side of the limiting plate is provided with an arc-shaped groove matched with the spherical block. The limiting plate and the spherical block are in contact, and under the rebounding action of the compression spring, the sliding plate is reset along the inside of the moving groove, and the spherical block and the arc-shaped groove can be mutually clamped.

[0010] Preferably, the front end of the limiting block is fixedly connected with a connecting rod, and the front end of the connecting rod is fixedly installed with an extrusion plate. The extrusion plate can be extruded with the outer side of the sound-absorbing box, and through the rebound of the return spring, the buffer can be conveniently performed, the damage caused by excessive impact force of the internal hollow plate can be prevented, the rupture caused by excessive installation can be effectively avoided, and when the first prefabricated wall plate and the second prefabricated wall plate are mutually clamped, the spherical block can be extruded with the limiting plate, so that the spherical block can slide the sliding plate along the inside of the installation slot.

[0011] Preferably, the inner side of the mounting rod is provided with a movable slot matched with the limiting block, and the limiting block and the mounting rod are slidably installed through the return spring. The connecting rod slides in the inside of the mounting rod, so that the limiting block can move along the inside of the movable slot to extrude the return spring, the extrusion plate can be extruded with the outer side of the sound-absorbing box during the installation process between the first prefabricated wall plate and the sound-absorbing box, and through the rebound of the return spring, the buffer can be conveniently performed to prevent the damage caused by excessive impact force of the internal hollow plate.

[0012] Preferably, the sound-absorbing frames are fixed through the frame plate, the outer side of the sound-absorbing frame is provided with an absorption slot, and the outer side of the frame plate is provided with an adsorption hole. The frame plate can conveniently absorb the adsorption hole, so that the generated noise can be conveniently absorbed, the noise can be effectively reduced, the sound insulation function is increased, the hollow pipe can support the sound-absorbing box, the sound-absorbing frame and the sound-absorbing box can maintain a large gap, the noise absorbed by the sound-absorbing hole is absorbed to the sound-absorbing frame through the absorption slot, and the noise is adsorbed.

[0013] Preferably, the surface of the sound-absorbing box is provided with a sound-absorbing hole, and the sound-absorbing box and the sound-absorbing frame are fixedly connected through the hollow pipe. The sound-absorbing hole can conveniently absorb the noise into the inside of the sound-absorbing box, the frame plate can conveniently absorb the adsorption hole, so that the generated noise can be conveniently absorbed, the noise can be effectively reduced, the sound insulation function is increased, the hollow pipe can support the sound-absorbing box, the sound-absorbing frame and the sound-absorbing box can maintain a large gap, the noise absorbed by the sound-absorbing hole is absorbed to the sound-absorbing frame through the absorption slot, and the noise is adsorbed, thereby increasing the sound insulation effect.

[0014] Preferably, the inner side of the second prefabricated wall plate is fixedly connected with a sound-absorbing pad, and the front end of the sound-absorbing pad is fixedly connected with a conical sound-absorbing cotton. The sound-absorbing pad can conveniently install the conical sound-absorbing cotton, so that the leaked noise can be adsorbed through the conical sound-absorbing cotton, the missed noise can be conveniently adsorbed again, the sound-absorbing pad can be isolated from the second prefabricated wall plate, the generated vibration and noise can be conveniently absorbed, and the sound insulation is more convenient during use.

[0015] Preferably, the sound-absorbing box is slidably installed between the second prefabricated wall plate and the first prefabricated wall plate through the sliding block, and the inner side of the first prefabricated wall plate and the second prefabricated wall plate are respectively provided with a second sliding groove and a first sliding groove matched with the sliding block. Through the sliding block, the first prefabricated wall plate and the second prefabricated wall plate can be slid along the inside of the first sliding groove, so that the sound-absorbing box is conveniently limited between the first prefabricated wall plate and the second prefabricated wall plate, which is more convenient during installation, and also more convenient during replacement and maintenance of the sound-absorbing box, so that it is more convenient during use. Through the first sliding groove and the second sliding groove, the sound-absorbing box can be conveniently connected, so that the sound-absorbing box can be conveniently installed, and the operation is convenient and fast.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] 1. By setting the mutual cooperation between the tapered sound-absorbing cotton, the sound-absorbing hole, the sound-absorbing box, the sound-absorbing frame and the hollow pipe, the internal sound can be conveniently absorbed by the tapered sound-absorbing cotton, the noise can be conveniently absorbed, the sound-absorbing box can be installed between the first prefabricated wall plate and the second prefabricated wall plate by sliding along the first sliding groove and the second sliding groove through the sliding block, the noise can be absorbed by the sound-absorbing frame, the sound-absorbing frame and the sound-absorbing box can be conveniently supported by the hollow pipe, the sound-absorbing frame can be installed in the sound-absorbing box, and the sound-absorbing frame can be kept in a large gap with the sound-absorbing box, so that the noise can be absorbed by the sound-absorbing frame, and the internal sound-absorbing operation can be conveniently performed by the frame plate.

[0018] 2. By setting the mutual cooperation between the heat insulation cotton, the mesh cloth, the connecting rod, the extrusion plate and the limiting block, the heat dissipated by the outer wall can be conveniently absorbed by the mesh cloth, the waste heat can be conveniently isolated by the mesh cloth, the problem of poor sound insulation effect is solved, the situation of poor heat preservation effect is avoided, the connecting rod is slid in the installation rod, the limiting block can move along the inside of the movable groove to extrude the reset spring, and the installation process between the first prefabricated wall plate and the sound-absorbing box can be conveniently buffered to prevent damage caused by excessive impact force of the internal hollow plate. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective view of the appearance of the present application.

[0020] Figure 2 It is a schematic view of the local structure of the tapered sound-absorbing cotton of the present application.

[0021] Figure 3 It is a schematic view of the local structure of the sound-absorbing hole of the present application.

[0022] Figure 4This is a partial structural diagram of the silencer frame of the present invention.

[0023] Figure 5 This is a schematic diagram of the grid layout section structure of the present invention.

[0024] Figure 6 This is a partial structural diagram of the mounting rod of the present invention.

[0025] Figure 7 This is a partial structural diagram of the sliding plate of the present invention.

[0026] In the diagram: 1. First precast wall panel; 101. Second precast wall panel; 102. Conical sound-absorbing cotton; 103. First sliding groove; 104. Second sliding groove; 105. Sound-absorbing pad; 2. Sound-absorbing box; 201. Sliding block; 202. Sound-absorbing hole; 203. Sound-absorbing frame; 204. Hollow tube; 205. Absorption groove; 206. Frame plate; 207. Adsorption hole; 3. Heat insulation cotton; 301. Mesh cloth; 302. Mounting rod; 303. Movable groove; 304. Connecting rod; 305. Limiting block; 306. Return spring; 307. Extrusion plate; 4. Mounting groove; 401. Limiting plate; 402. Moving groove; 403. Sliding plate; 404. Movable block; 405. Extrusion spring; 406. Spherical block; 407. Arc groove. Detailed Implementation

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1:

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the present invention proposes a lightweight precast wall with multiple thermal insulation and soundproofing structures, comprising a first precast wall panel 1, a soundproof box 2, and thermal insulation cotton 3. A second precast wall panel 101 is fixedly attached to the rear end of the first precast wall panel 1. The soundproof box 2 is slidably installed inside the second precast wall panel 101. A soundproofing frame 203 is fixedly connected inside the soundproof box 2. Thermal insulation cotton 3 is fixedly connected to the rear end of the first precast wall panel 1. A mesh cloth 301 is fixedly connected to the rear end of the thermal insulation cotton 3. An installation rod 302 is fixedly connected to the rear end of the mesh cloth 301. A limit block 305 is slidably installed inside the installation rod 302. An installation groove 4 is fixedly connected to the inner side of the second precast wall panel 101. A sliding plate 403 is slidably installed inside the installation groove 4. A spherical block 406 is fixedly connected to the inner side of the sliding plate 403. A limit block 406 is fixedly connected to the inner side of the first precast wall panel 1. Plate 401, mounting groove 4 and sliding plate 403 are slidably installed together via movable block 404, and the inner side of mounting groove 4 is provided with a moving groove 402 that cooperates with movable block 404. Mounting groove 4 and sliding plate 403 are movably connected together via compression spring 405. The outer side of limiting plate 401 is provided with an arc groove 407 that cooperates with spherical block 406. The front end of limiting block 305 is fixedly connected to connecting rod 304, and compression plate 307 is fixedly installed at the front end of connecting rod 304. The inner side of mounting rod 302 is provided with a moving groove 303 that cooperates with limiting block 305, and limiting block 305 and mounting rod 302 are slidably installed together via return spring 306. Silencing frame 203 is fixed together via frame plate 206. The outer side of silencer frame 203 is provided with absorption groove 205, and the outer side of frame plate 206 is provided with adsorption hole 207.

[0030] The working principle of the lightweight precast wall with multiple thermal insulation and sound insulation structures based on Embodiment 1 is as follows: The silencing box 2 can be easily installed between the second precast wall panel 101 and the first precast wall panel 1. During noise generation, the conical sound-absorbing cotton 102 absorbs the internal sound, effectively absorbing the noise. Simultaneously, the silencing box 2 can be installed between the first precast wall panel 1 and the second precast wall panel 101 by sliding along the first sliding groove 103 and the second sliding groove 104 using the sliding block 201. The sliding block 201 facilitates the movement of the first precast wall panel 1 and the second precast wall panel 101 along the interior of the first sliding groove 103. The soundproof box 2 is slidably positioned between the first precast wall panel 1 and the second precast wall panel 101, making installation easier and replacement and maintenance more convenient. The first sliding groove 103 and the second sliding groove 104 facilitate docking of the soundproof box 2, allowing for easy installation and quick operation. The soundproof frame 203 absorbs noise, and the soundproof holes 202 effectively absorb noise into the interior of the soundproof box 2. The frame plate 206 further absorbs the noise through the absorption holes 207, ensuring effective noise absorption. This effectively reduces noise and increases sound insulation. The hollow tube 204 supports the muffler box 2, maintaining a large gap between the muffler frame 203 and the muffler box 2. This allows noise absorbed by the muffler holes 202 to be absorbed through the absorption grooves 205 and then absorbed into the muffler frame 203, thus increasing sound insulation. The muffler frame 203 can be installed in the muffler box 2, and the absorption holes 207 facilitate noise collection, effectively reducing noise. The hollow tube 204 conveniently supports the muffler frame 203 and the muffler box 2, maintaining a large gap between them, allowing noise to pass through the muffler. The frame 203 absorbs noise, and the frame plate 206 facilitates internal sound absorption. The sound-absorbing pad 105 allows for easy installation of the conical sound-absorbing cotton 102, which absorbs leaked noise and allows for secondary absorption of any remaining noise. The sound-absorbing pad 105 isolates the second precast wall panel 101, facilitating the absorption of vibrations and noise, thus improving sound insulation during use. The mesh cloth 301 absorbs heat radiated from the exterior wall and effectively isolates residual heat, solving the problem of poor sound insulation and avoiding poor thermal insulation.

[0031] By sliding the connecting rod 304 inside the mounting rod 302, the limiting block 305 can move along the inside of the movable groove 303 to press the return spring 306. During the installation of the first precast wall panel 1 and the muffler box 2, the pressing plate 307 presses against the outside of the muffler box 2. The rebound of the return spring 306 can easily buffer the impact and prevent damage caused by excessive impact force on the internal hollow plate. This effectively avoids cracking caused by over-installation. At the same time, when the first precast wall panel 1 and the second precast wall panel 101 are interlocked, the limiting plate 401 presses against the spherical block 406, allowing the spherical block 406 to slide the sliding plate 403 along the inside of the mounting groove 4. This allows the movable block 404 to move along the inside of the moving groove 402 and slide outwards via the sliding plate 403, facilitating the compression spring 405 to press, causing the limiting plate 401 to contact the spherical block 406. Under the rebound action of the compression spring 405, the sliding plate 403 can be reset along the inside of the moving groove 402, allowing the spherical block 406 to engage with the arc groove 407, thus facilitating the limiting and fixing of the first precast wall panel 1 and the second precast wall panel 101. Under the action of the connecting rod 304, the silencer box 2 is compressed, pressing along the second sliding groove 104 and the first sliding groove 103, facilitating the installation of the silencer box 2 and improving its internal usability.

[0032] Example 2:

[0033] like Figure 2 , Figure 3 and Figure 5 As shown, the lightweight precast wall with multiple thermal insulation and sound insulation structures proposed in this invention, compared with Embodiment 1, further includes: a sound-absorbing hole 202 is opened on the surface of the sound-absorbing box 2, and the sound-absorbing box 2 and the sound-absorbing frame 203 are fixedly connected by a hollow tube 204; a sound-absorbing pad 105 is fixedly connected to the inner side of the second precast wall panel 101, and a conical sound-absorbing cotton 102 is fixedly connected to the front end of the sound-absorbing pad 105; the sound-absorbing box 2, the second precast wall panel 101, and the first precast wall panel 1 are slidably installed through a sliding block 201, and the inner sides of the first precast wall panel 1 and the second precast wall panel 101 are respectively provided with a second sliding groove 104 and a first sliding groove 103 that cooperate with the sliding block 201.

[0034] In this embodiment, as Figure 3As shown, noise can be easily absorbed into the interior of the silencing box 2 through the silencing hole 202, while the frame plate 206 can easily absorb the adsorption hole 207, making it easy to absorb the generated noise, effectively reducing noise and increasing the sound insulation function. Simultaneously, the hollow tube 204 provides support between the silencing box 2 and the silencing frame 203, maintaining a large gap between them. This allows the noise absorbed by the silencing hole 202 to be absorbed through the absorption groove 205 into the space between the silencing frame 203, further adsorbing the noise and increasing the sound insulation effect. Figure 2 As shown, the cone-shaped sound-absorbing cotton 102 can be easily installed using the sound-absorbing pad 105, allowing leaked noise to be absorbed by the cone-shaped sound-absorbing cotton 102, and enabling secondary absorption of any remaining noise. The sound-absorbing pad 105 also provides isolation between the sound-absorbing pad and the second precast wall panel 101, facilitating the absorption of vibrations and noise, thus improving sound insulation during use. Figure 5 As shown, the sliding block 201 allows the first precast wall panel 1 and the second precast wall panel 101 to slide conveniently along the inside of the first sliding groove 103, so that the muffler box 2 can be conveniently positioned between the first precast wall panel 1 and the second precast wall panel 101, making the installation process more convenient. At the same time, it is also more convenient to replace and maintain the muffler box 2, making it more convenient to use. The first sliding groove 103 and the second sliding groove 104 can be used to connect the muffler box 2 relatively easily, so that the muffler box 2 can be easily installed and operated quickly and easily.

[0035] The above specific embodiments are merely several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A lightweight prefabricated wall with multiple heat and sound insulation structure, comprising a first prefabricated wallboard (1), a sound-absorbing box (2) and a heat insulation cotton (3), characterized in that: The rear end of the first prefabricated wallboard (1) is fixedly connected with a second prefabricated wallboard (101), a sound-absorbing box (2) is slidably arranged in the second prefabricated wallboard (101), the sound-absorbing box (2) is slidably connected with the second prefabricated wallboard (101) and the first prefabricated wallboard (1) through a sliding block (201), and the inner sides of the first prefabricated wallboard (1) and the second prefabricated wallboard (101) are respectively provided with a second sliding groove (104) and a first sliding groove (103) matched with the sliding block (201), so that the sound-absorbing box is conveniently limited between the first prefabricated wallboard and the second prefabricated wallboard. The sound-absorbing box (2) is fixedly connected with a sound-absorbing frame (203), and the sound-absorbing box (2) and the sound-absorbing frame (203) are fixedly connected through a hollow pipe (204), the sound-absorbing frame (203) and the sound-absorbing box (2) are kept apart, and the surface of the sound-absorbing box (2) is provided with a sound-absorbing hole (202), and the outer side of the sound-absorbing frame (203) is provided with an absorbing groove (205). The rear end of the first prefabricated wallboard (1) is fixedly connected with a heat insulation cotton (3), the rear end of the heat insulation cotton (3) is fixedly connected with a mesh cloth (301), the rear end of the mesh cloth (301) is fixedly connected with a mounting rod (302), the inside of the mounting rod (302) is slidably arranged with a limiting block (305), the front end of the limiting block (305) is fixedly connected with a connecting rod (304), and the front end of the connecting rod (304) is fixedly arranged with an extrusion plate (307). The inner side of the second prefabricated wallboard (101) is fixedly connected with a mounting groove (4), the inside of the mounting groove (4) is slidably arranged with a sliding plate (403), the inner side of the sliding plate (403) is fixedly connected with a spherical block (406), the inner side of the first prefabricated wallboard (1) is fixedly connected with a limiting plate (401), the mounting groove (4) and the sliding plate (403) are movably connected through an extrusion spring (405), the outer side of the limiting plate (401) is provided with an arc-shaped groove (407) matched with the spherical block (406), when the first prefabricated wallboard (1) and the second prefabricated wallboard (101) are mutually clamped, the spherical block (406) can slide along the inside of the mounting groove (4) by extruding between the limiting plate (401) and the spherical block (406), under the rebounding action of the extrusion spring (405), the sliding plate (403) can be reset along the inside of the moving groove (402), the spherical block (406) and the arc-shaped groove (407) can be mutually clamped, so that the first prefabricated wallboard (1) and the second prefabricated wallboard (101) are conveniently limited and fixed.

2. The light-weight prefabricated wall with multiple heat and sound insulation structures according to claim 1, characterized in that: The mounting groove (4) and the sliding plate (403) are slidably arranged through a movable block (404), and the inner side of the mounting groove (4) is provided with a moving groove (402) matched with the movable block (404).

3. The light-weight prefabricated wall with multiple thermal and sound insulation structures according to claim 1, characterized in that: The inner side of the mounting rod (302) is provided with a movable groove (303) matched with the limiting block (305), and the limiting block (305) and the mounting rod (302) are slidably arranged through a reset spring (306).

4. The lightweight prefabricated wall with multiple heat and sound insulation structures according to claim 1, characterized in that: The sound-absorbing frames (203) are fixed through frame plates (206), and the outer side of the frame plates (206) is provided with adsorbing holes (207).

5. The lightweight prefabricated wall with multiple thermal and sound insulation structures according to claim 1, characterized in that: The inner side of the second prefabricated wallboard (101) is fixedly connected with a sound-absorbing pad (105), and the front end of the sound-absorbing pad (105) is fixedly connected with a conical sound-absorbing cotton (102).

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