Mobile operation platform for photovoltaic construction

Abstract

The utility model relates to the technical field of photovoltaic construction, and discloses a photovoltaic construction mobile operation platform which comprises a frame body, a lifting frame is arranged in the frame body, the two sides of the lifting frame are each rotationally connected with two idler wheels, the two sides of the frame body are each provided with two guide grooves, and the idler wheels roll in the groove directions of the guide grooves. A power assembly enabling the lifting frame to move up and down is arranged on one side of the frame body, and a locking assembly for fixing the lifting frame after the lifting frame moves is arranged on the other side of the frame body. According to the working platform, the moving wheels can be prevented from moving, the stability of the working platform is improved, the area of the working platform is increased, the using safety of the working platform is improved, the position of the lifting frame can be locked and fixed, and therefore the weighing capacity of the lifting platform can be improved, the using effect of the working platform is improved, and the working platform is convenient to use. And the friction force between the frame body and the ground can be increased, so that the frame body is not easy to move, and the use stability of the working platform is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic construction, in particular to a mobile working platform for photovoltaic construction. Background Art

[0002] Photovoltaic is short for solar photovoltaic power generation system, which is a power generation system that uses the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electric energy. It has two operation modes: independent operation and grid-connected operation. During the photovoltaic construction process, a working platform is required for construction.

[0003] At present, when the commonly used mobile working platform is in use, there are still the following defects:

[0004] 1. Since the mobile working platform usually uses mobile wheels for movement, when the mobile working platform is lifted, the mobile wheels are prone to move, resulting in unstable center of gravity;

[0005] 2. The extension position of the mobile working platform is limited. When there is a certain distance between the working platform and the installation object, due to its elevated position, the gap poses a safety hazard to the staff during the working process. Content of the Utility Model

[0006] (I) Technical Problems to be Solved

[0007] Aiming at the deficiencies of the prior art, the utility model provides a mobile working platform for photovoltaic construction, mainly to solve the problems that since the mobile working platform usually uses mobile wheels for movement, when the mobile working platform is lifted, the mobile wheels are prone to move, resulting in unstable center of gravity; and the extension position of the mobile working platform is limited. When there is a certain distance between the working platform and the installation object, due to its elevated position, the gap poses a safety hazard to the staff during the working process.

[0008] (II) Technical Solutions

[0009] To achieve the above object, the utility model provides the following technical solutions:

[0010] A photovoltaic construction mobile operation platform, including a frame body. An elevating frame is arranged inside the frame body. Two rollers are rotatably connected to both sides of the elevating frame. Two guiding grooves are respectively opened on both sides of the frame body, enabling the rollers to roll along the groove direction of the guiding grooves. A power assembly for moving the elevating frame up and down is arranged on one side of the frame body, and a locking assembly for fixing the elevating frame after movement is arranged on the other side of the frame body. An elevating platform is fixedly connected inside the elevating frame. A guardrail is fixedly connected to the upper surface of the elevating platform. Two first embedding grooves are opened on the upper surface of the elevating platform. A first rotating shaft is rotatably connected inside each of the two first embedding grooves. A first turning plate is fixedly connected to one side of the first rotating shaft. A second embedding groove is opened on one side of the first turning plate. A second rotating shaft is rotatably connected inside the second embedding groove. A second turning plate is fixedly connected to one side of the second rotating shaft. A plurality of clamping grooves are opened on one side of the second turning plate. A clamping block is clamped in two opposite clamping grooves, connecting the two second turning plates. Open-ended sliding grooves are respectively opened at the bottom positions on both sides of the frame body. A sliding frame is slidably connected inside the sliding groove. A second moving wheel is rotatably connected inside the sliding frame. A connecting plate is fixedly connected to the top of the sliding frame, enabling the elevating platform to press on the connecting plate. One end of the connecting plate is fixedly connected to a connecting column. The bottom end of the connecting column passes through the frame body and is rotatably connected to a first moving wheel. Extension assemblies are respectively arranged at the bottom positions on both sides of the frame body, changing the area of contact between the frame body and the ground.

[0011] Further, an edge plate for supporting the first turning plate is fixedly connected to one side of the elevating platform. The length of the second turning plate is less than the length of the second embedding groove, enabling the extra part of the first turning plate to support the second turning plate.

[0012] On the basis of the foregoing solution, the power assembly includes an electric push rod. The electric push rod is fixedly connected to the bottom of the frame body. A fixing frame is fixedly connected to one side of the frame body. The electric push rod passes through the fixing frame and is fixed to the fixing frame. One end of the telescopic part of the electric push rod is fixedly connected to a U-shaped plate. A pulley is rotatably connected inside the U-shaped plate. A steel cable is fixedly connected to the bottom of the frame body. The steel cable bypasses the pulley and is fixed to the elevating frame.

[0013] As a further solution of the present utility model, the locking assembly includes two mounting plates. Both of the two mounting plates are fixedly connected to the other side of the frame body. The two mounting plates are respectively located on both sides of the elevating frame. A plurality of locking holes are respectively opened on the other sides of the two mounting plates. Electromagnetic locks are fixedly connected to both sides of the elevating frame, and the electromagnetic locks are inserted into the locking holes to lock the elevating frame.

[0014] Further, the extension assembly includes two connecting shafts. Rotation holes are formed at both sides of the bottom of the frame body. The two connecting shafts are respectively rotatably connected in the two rotation holes. Support plates are fixedly connected to the bottom ends of the two connecting shafts. A stop block for resisting the support plates is fixedly connected to the bottom of the frame body. Torsion springs are sleeved on the circumferential outer walls of the two connecting shafts, and the two ends of the torsion springs are respectively fixed to the connecting shafts and the frame body. Stop rods are fixedly connected to the top ends of the two connecting shafts. A stop frame for resisting the stop rods is fixedly connected to the top of the connecting plate.

[0015] On the basis of the foregoing solution, bottom plates are fixedly connected to the bottoms of the frame body and the support plates, and a plurality of anti-slip cones are fixedly connected to the bottoms of the bottom plates.

[0016] As a further solution of the present utility model, a sliding hole penetrating through the connecting plate is formed in the top of the connecting plate. A positioning column is slidably connected in the sliding hole and is fixed to the frame body. A spring is sleeved on the circumferential outer wall of the positioning column, and the two ends of the spring are respectively fixed to the connecting plate and the positioning column.

[0017] Further, a push handle is fixedly connected to the position of the frame body and the fixed frame on the same side, and the push handle is located above the fixed frame.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present utility model provides a photovoltaic construction mobile operation platform, which has the following beneficial effects:

[0020] 1. Through the combined use of the lifting mobile wheels 1 and 2, when the lifting platform rises, the lifting platform no longer presses on the connecting plate. At this time, under the action of gravity, the frame body will move downward, while the connecting plate will remain relatively stationary, so that the mobile wheels 1 and 2 are separated from the ground, thereby avoiding the movement of the mobile wheels, improving the stability of the operation platform, and at the same time, the flip plate 1 can be flipped, and then the flip plate 2 can be rotated, thereby increasing the area of the operation platform and improving the safety of using the operation platform.

[0021] 2. Through the setting of the locking assembly, when the lifting frame rises to a suitable height, the position of the lifting frame can be locked and fixed through the locking assembly, thereby improving the weighing capacity of the lifting platform and improving the use effect of the operation platform.

[0022] 3. Through the setting of the anti-slip cones, after the mobile wheels 1 and 2 are separated from the ground, the anti-slip cones will come into contact with the ground, thereby increasing the friction between the frame body and the ground and making the frame body not move easily, further improving the stability of using the operation platform. Description of the drawings

[0023] Figure 1 Schematic diagram of the front three-dimensional structure of a mobile working platform for photovoltaic construction proposed by the present utility model;

[0024] Figure 2 Schematic diagram of the lifting of a mobile working platform for photovoltaic construction proposed by the present utility model;

[0025] Figure 3 Enlarged schematic diagram of part A of a mobile working platform for photovoltaic construction proposed by the present utility model;

[0026] Figure 4 Schematic diagram of the rear three-dimensional structure of a mobile working platform for photovoltaic construction proposed by the present utility model;

[0027] Figure 5 Schematic diagram of the bottom three-dimensional structure of a mobile working platform for photovoltaic construction proposed by the present utility model;

[0028] Figure 6 Enlarged schematic diagram of the lifting platform of a mobile working platform for photovoltaic construction proposed by the present utility model;

[0029] Figure 7 Schematic diagram of the first state of the unfolded lifting platform of a mobile working platform for photovoltaic construction proposed by the present utility model;

[0030] Figure 8 Schematic diagram of the second state of the unfolded lifting platform of a mobile working platform for photovoltaic construction proposed by the present utility model.

[0031] In the figure: 1, frame body; 2, guardrail; 3, lifting platform; 4, lifting frame; 5, mounting plate; 6, locking hole; 7, electromagnetic lock; 8, support plate; 9, blocking rod; 10, first moving wheel; 11, connecting column; 12, positioning column; 13, spring; 14, blocking frame; 15, connecting plate; 16, sliding groove; 17, sliding frame; 18, second moving wheel; 19, bottom plate; 20, torsion spring; 21, pulley; 22, push handle; 23, fixing frame; 24, steel cable; 25, electric push rod; 26, roller; 27, anti-slip cone; 28, first rotating shaft; 29, first flipping plate; 30, first embedding groove; 31, edge plate; 32, second flipping plate; 33, second embedding groove; 34, second rotating shaft; 35, clamping groove. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] Reference Figures 1 - 8 , a mobile operation platform for photovoltaic construction, including a frame body 1. An elevating frame 4 is arranged inside the frame body 1. Two rollers 26 are rotatably connected to both sides of the elevating frame 4. Two guiding grooves are formed on both sides of the frame body 1, enabling the rollers 26 to roll along the groove direction of the guiding grooves. A power assembly for moving the elevating frame 4 up and down is arranged on one side of the frame body 1, and a locking assembly for fixing the elevating frame 4 after movement is arranged on the other side of the frame body 1. An elevating platform 3 is fixed inside the elevating frame 4 by bolts. When the power assembly moves the elevating frame 4 upward, the elevating frame 4 will drive the rollers 26 to roll along the guiding grooves, thereby reducing the friction force during the movement of the elevating frame 4. The elevating frame 4 will drive the elevating platform 3 upward. A guardrail 2 is fixed on the upper surface of the elevating platform 3 by bolts, and the guardrail 2 can protect the staff;

[0034] Two first embedding grooves 30 are formed on the upper surface of the elevating platform 3. A first rotating shaft 28 is rotatably connected to each of the two first embedding grooves 30. A first turning plate 29 is welded to one side of the first rotating shaft 28. A second embedding groove 33 is formed on one side of the first turning plate 29. A second rotating shaft 34 is rotatably connected to the second embedding groove 33. A second turning plate 32 is welded to one side of the second rotating shaft 34. A plurality of clamping grooves 35 are formed on one side of the second turning plate 32. A clamping block is clamped in two opposite clamping grooves 35 to connect the two second turning plates 32. An edge plate 31 for supporting the first turning plate 29 is welded to one side of the elevating platform 3. The length of the second turning plate 32 is less than that of the second embedding groove 33, so that the extra part of the first turning plate 29 supports the second turning plate 32. Rotate the first turning plate 29 through the first rotating shaft 28. After rotating the first turning plate 29 by 180 degrees, the edge plate 31 supports the first turning plate 29. Then rotate the second turning plate 32 through the second rotating shaft 34, rotate the second turning plate 32 by 180 degrees, and make the extra part of the first turning plate 29 support the second turning plate 32. Subsequently, insert the clamping block into two opposite clamping grooves 35 to connect the two second turning plates 32, thereby increasing the area of the operation platform and improving the safety of using the operation platform;

[0035] Open - type sliding grooves 16 are provided at the positions of both sides of the frame body 1 at the bottom. A sliding frame 17 is slidably connected in the sliding groove 16. A second moving wheel 18 is rotatably connected in the sliding frame 17. A connecting plate 15 is welded to the top of the sliding frame 17. The lifting platform 3 presses on the connecting plate 15. One end of the connecting plate 15 is welded with a connecting column 11. The bottom end of the connecting column 11 passes through the frame body 1 and is rotatably connected with a first moving wheel 10. Extension components are provided at the positions of both sides of the frame body 1 at the bottom, so as to change the area of contact between the frame body 1 and the ground. During the upward movement of the lifting platform 3, it no longer presses on the connecting plate 15. At this time, under the action of gravity, the frame body 1 will move downward, so that the second moving wheel 18 and the first moving wheel 10 in the sliding frame 17 will be separated from the ground, avoiding the movement of the moving wheels and improving the stability of the working platform.

[0036] In the present utility model, the power assembly includes an electric push rod 25. The electric push rod 25 is fixed to the bottom of the frame body 1 by bolts. A fixed frame 23 is fixed to one side of the frame body 1 by bolts. The electric push rod 25 passes through the fixed frame 23 and is fixed to the fixed frame 23. One end of the telescopic part of the electric push rod 25 is fixed to a U - shaped plate by bolts. A pulley 21 is rotatably connected in the U - shaped plate. A steel cable 24 is fixed to the bottom of the frame body 1 by bolts. The steel cable 24 bypasses the pulley 21 and is fixed to the lifting frame 4. When the electric push rod 25 extends, it pushes the pulley 21 to move upward. During the upward movement of the pulley 21, it will pull the lifting frame 4 upward through the steel cable 24. The locking assembly includes two mounting plates 5. Both mounting plates 5 are welded to the other side of the frame body 1. The two mounting plates 5 are respectively located on both sides of the lifting frame 4. A plurality of locking holes 6 are provided on the other sides of the two mounting plates 5. Electromagnetic locks 7 are fixed to both sides of the lifting frame 4 by bolts, and the electromagnetic locks 7 are inserted into the locking holes 6 for locking the lifting frame 4. When the lifting platform 3 rises to an appropriate height, the electromagnetic locks 7 are inserted into the locking holes 6 on the mounting plates 5 to lock and fix the lifting platform 3, thereby improving the load - bearing capacity of the lifting platform 3.

[0037] Particularly, the extension component includes two connecting shafts. Rotation holes are provided at both side positions at the bottom of the frame body 1. The two connecting shafts are respectively rotatably connected in the two rotation holes. Support plates 8 are welded to the bottom ends of the two connecting shafts. A stop block for resisting the support plate 8 is welded to the bottom of the frame body 1. Torsion springs 20 are sleeved on the circumferential outer walls of the two connecting shafts, and the two ends of the torsion spring 20 are respectively fixed to the connecting shaft and the frame body 1. Stop rods 9 are welded to the top ends of the two connecting shafts. A stop frame 14 for resisting the stop rod 9 is fixed to the top of the connecting plate 15 by bolts. Bottom plates 19 are fixed to the bottoms of the frame body 1 and the support plate 8 by bolts. A plurality of anti-slip cones 27 are adhered to the bottom of the bottom plate 19. A sliding hole penetrating through the connecting plate 15 is provided at the top of the connecting plate 15. A positioning column 12 is slidably connected in the sliding hole, and the positioning column 12 is fixed to the frame body 1. A spring 13 is sleeved on the circumferential outer wall of the positioning column 12, and the two ends of the spring 13 are respectively fixed to the connecting plate 15 and the positioning column 12. During the process of the frame body 1 moving downward under the action of gravity, the spring 13 in a stretched state will pull the connecting plate 15 upward. The connecting plate 15 will drive the sliding frame 17 to move upward along the sliding groove 16. At the same time, the connecting plate 15 will drive the connecting column 11 upward. The connecting column 11 will drive the first moving wheel 10 upward. During the upward movement of the connecting plate 15, the stop frame 14 will no longer resist the stop rod 9. At this time, the torsion spring 20 in a stressed state will cause the connecting shaft to rotate. The connecting shaft will drive the stop rod 9 and the support plate 8 to rotate. When the support plate 8 rotates to be completely rotated and opened by the stop block, at this time, the second moving wheel 18 and the first moving wheel 10 in the sliding frame 17 will be separated from the ground. At the same time, the anti-slip cones 27 at the bottoms of the support plate 8 and the frame body 1 will contact the ground, thereby increasing the friction between the frame body 1 and the ground. A push handle 22 is fixed to the position on the same side of the frame body 1 and the fixed frame 23 by bolts, and the push handle 22 is located above the fixed frame 23.

[0038] Working principle of this embodiment: During use, the electric push rod 25 extends to push the pulley 21 to move upward. During the upward movement of the pulley 21, the lifting frame 4 will be pulled upward by the steel cable 24. The lifting frame 4 will drive the roller 26 to roll along the guide groove, thereby reducing the friction force during the movement of the lifting frame 4. The lifting frame 4 will drive the lifting platform 3 to move upward. During the upward movement of the lifting platform 3, it will no longer squeeze the connecting plate 15. At this time, under the action of gravity, the frame body 1 will move downward. At the same time, the spring 13 in the stretched state will pull the connecting plate 15 upward. The connecting plate 15 will drive the sliding frame 17 to move upward along the sliding groove 16. At the same time, the connecting plate 15 will drive the connecting column 11 upward. The connecting column 11 will drive the first moving wheel 10 upward. During the upward movement of the connecting plate 15, the blocking frame 14 will no longer block the blocking rod 9. At this time, the torsion spring 20 in the stressed state will cause the connecting shaft to rotate. The connecting shaft will drive the blocking rod 9 and the support plate 8 to rotate. When the support plate 8 rotates until it is completely rotated and opened by being blocked by the blocking block, at this time, the second moving wheel 18 and the first moving wheel 10 in the sliding frame 17 will be separated from the ground. And at this time, the support plate 8 and the anti-slip cone 27 at the bottom of the frame body 1 will be in contact with the ground, thereby increasing the friction force between the frame body 1 and the ground, preventing the frame body 1 from rotating, thus avoiding the movement of the moving wheels, improving the stability of the working platform. When the lifting platform 3 rises to an appropriate height, the electromagnetic lock 7 is inserted into the locking hole 6 on the mounting plate 5 to lock and fix the lifting platform 3, thereby improving the load-bearing capacity of the lifting platform 3 and enhancing the use effect of the working platform. The first flip plate 29 is rotated through the first rotating shaft 28. After rotating the first flip plate 29 by 180 degrees, the edge plate 31 supports the first flip plate 29. Then the second flip plate 32 is rotated through the second rotating shaft 34. The second flip plate 32 is rotated by 180 degrees, and the extra part of the first flip plate 29 supports the second flip plate 32. Subsequently, the clamping block is inserted into the two opposite clamping grooves 35 to connect the two second flip plates 32, thereby increasing the area of the working platform and improving the safety of using the working platform.

[0039] All the electrical components mentioned in this article are electrically connected to the external main controller and 220V mains power, and the main controller can be a conventional known device such as a computer for control.

[0040] In the description in this article, it should be noted that relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic construction mobile work platform, comprising a frame (1), characterized in that: The frame body (1) is provided with a lifting frame (4), and two rollers (26) are rotatably connected on both sides of the lifting frame (4). Two guide grooves are provided on both sides of the frame body (1) so that the rollers (26) roll along the groove direction of the guide grooves. A power component for enabling the lifting frame (4) to move up and down is provided on one side of the frame body (1), and a locking component for fixing the lifting frame (4) after movement is provided on the other side of the frame body (1). A lifting platform (3) is fixedly connected to the lifting frame (4), and a guardrail (2) is fixedly connected to the upper surface of the lifting platform (3). Two embedded grooves (30) are provided on the upper surface of the lifting platform (3), and a rotating shaft (28) is rotatably connected to each of the two embedded grooves (30). A flip plate (29) is fixedly connected to one side of the rotating shaft (28), and an embedded groove (33) is provided on one side of the flip plate (29). A rotating shaft (28) is rotatably connected to the embedded groove (33). 34), one side of the second rotating shaft (34) is fixedly connected with the second flip plate (32), one side of the second flip plate (32) is provided with a plurality of slots (35), two opposite slots (35) are provided with a block, so that the two flip plates (32) are connected, both sides of the frame (1) are provided with an open slide groove (16) at the bottom, a slide (17) is slidably connected in the slide groove (16), a moving wheel (18) is rotatably connected in the slide (17), a connecting plate (15) is fixedly connected to the top of the slide (17), so that the lifting platform (3) presses the connecting plate (15), one end of the connecting plate (15) is fixedly connected with a connecting column (11), the bottom end of the connecting column (11) passes through the frame (1) and is rotatably connected with a moving wheel (10), and both sides of the frame (1) are provided with an extension component at the bottom, so that the contact area between the frame (1) and the ground is changed.

2. A photovoltaic construction mobile work platform according to claim 1, characterized in that: An edge plate (31) supporting the flip plate 1 (29) is fixedly connected to one side of the lifting platform (3), and the length of the flip plate 2 (32) is smaller than the length of the embedded groove 2 (33), so that the extra part of the flip plate 1 (29) supports the flip plate 2 (32).

3. A photovoltaic construction mobile work platform according to claim 1, characterized in that: The power assembly comprises an electric push rod (25), the electric push rod (25) is fixedly connected to the bottom of the frame (1), one side of the frame (1) is fixedly connected to a fixing frame (23), the electric push rod (25) passes through the fixing frame (23) and is fixed to the fixing frame (23), one end of the telescopic part of the electric push rod (25) is fixedly connected to a U-shaped plate, a pulley (21) is rotatably connected inside the U-shaped plate, and a steel cable (24) is fixedly connected to the bottom of the frame (1), and the steel cable (24) passes around the pulley (21) and is fixed to the lifting frame (4).

4. A photovoltaic construction mobile work platform according to claim 1, characterized in that: The locking assembly comprises two mounting plates (5), the two mounting plates (5) are fixedly connected to the other side of the frame body (1), the two mounting plates (5) are respectively located on the two sides of the lifting frame (4), the other sides of the two mounting plates (5) are provided with a plurality of locking holes (6), the two sides of the lifting frame (4) are fixedly connected with electromagnetic locks (7), and the electromagnetic locks (7) are plugged into the locking holes (6) to lock the lifting frame (4).

5. A photovoltaic construction mobile work platform according to claim 1, characterized in that: The extension assembly comprises two connecting shafts, and the bottom of the frame body (1) is provided with rotating holes at both sides, and the two connecting shafts are rotatably connected in the two rotating holes respectively. The bottom ends of the two connecting shafts are fixedly connected to support plates (8), and the bottom of the frame body (1) is fixedly connected to a stopper for resisting the support plate (8). The circumferential outer walls of the two connecting shafts are sleeved with torsion springs (20), and the two ends of the torsion springs (20) are respectively fixed to the connecting shafts and the frame body (1), and the top ends of the two connecting shafts are fixedly connected to a stop rod (9), and the top of the connecting plate (15) is fixedly connected to a stop frame (14) for resisting the stop rod (9).

6. A photovoltaic construction mobile work platform according to claim 5, characterized in that: The bottoms of the frame (1) and the support plate (8) are both fixedly connected to a bottom plate (19), and the bottom of the bottom plate (19) is fixedly connected to a plurality of anti-slip cones (27).

7. A photovoltaic construction mobile work platform according to claim 1, characterized in that: A sliding hole penetrating the connecting plate (15) is provided at the top of the connecting plate (15), a positioning column (12) is slidably connected in the sliding hole, and the positioning column (12) is fixed to the frame (1), a spring (13) is sleeved on the circumferential outer wall of the positioning column (12), and two ends of the spring (13) are respectively fixed to the connecting plate (15) and the positioning column (12).

8. The photovoltaic construction mobile work platform according to claim 3, characterized in that: A push handle (22) is fixedly connected to the frame body (1) and the fixing frame (23) at a position on the same side, and the push handle (22) is located above the fixing frame (23).

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