Hubs and plastic pipe production lines

Abstract

This application provides a hub and a plastic tube production line. The hub includes: a frame assembly, which includes a track structure. The track structure is inclined, with a first end of the track structure having a higher vertical height than a second end of the track structure; a first roller assembly, which is movably connected to the track structure; and a second roller assembly, which is connected to the track structure and located on the side of the first roller assembly away from the second end of the track structure. The plastic tube is wound around the first roller assembly and the second roller assembly. This application effectively solves the problem in the prior art where a failure in a subsequent process of the hub causes a halt in the preceding production process during plastic tube production.

Description

Technical Field

[0001] The present application relates to the technical field of plastic pipe processing, and in particular to a concentrator and a plastic pipe production line. Background Art

[0002] Plastic hoses are widely used in various industries such as medical care, industrial manufacturing and household cleaning due to their anti-tensile, anti-compression and anti-static properties.

[0003] In the production process of plastic hoses, the produced plastic hoses are usually wound on a single-drum hub for temporary storage, and then subjected to cooling, cutting and other processes to obtain plastic hoses that meet usage requirements.

[0004] If there is a problem in the subsequent process of the hub in the prior art, the production of the plastic hose needs to be stopped, and the material overflows from the hub. This method has low production efficiency, as shown in CN117342348A. Utility Model Content

[0005] A technical problem to be solved by the present application is that in the production process of plastic pipes, there is a problem that a failure in the subsequent process of the hub causes the production process preceding the hub to be suspended.

[0006] In order to solve the above technical problems, the present application provides a hub and a plastic pipe production line.

[0007] A hub provided according to the present application includes: a frame assembly, the frame assembly includes a track structure, the track structure is arranged at an angle, and the height of the first end of the track structure in the vertical direction is higher than the height of the second end of the track structure in the vertical direction; a first roller assembly, the first roller assembly is movably connected to the track structure; a second roller assembly, the second roller assembly is connected to the track structure, the second roller assembly is located on the side of the first roller assembly away from the second end of the track structure, and a plastic tube is wound around the first roller assembly and the second roller assembly.

[0008] In some embodiments, the first roller assembly includes a first roller structure, a first mounting seat structure and a roller structure, the first roller structure is rotatably connected to the first mounting seat structure, the roller structure is rotatably connected to the first mounting seat structure, the roller structure is located on a side of the first mounting seat structure away from the first roller structure, and the roller structure is movably connected to the track structure.

[0009] In some embodiments, the roller structure includes a rolling segment and a limit segment, the limit segment includes two limit segments, the two limit segments are connected to the roller structure and are arranged at both ends of the rolling segment, the diameter of the limit segment is larger than the diameter of the rolling segment, and the track structure is partially arranged between the two limit segments.

[0010] In some embodiments, the rack assembly further includes a first vertical adjustment structure and a second vertical adjustment structure, the first vertical adjustment structure is connected to the first end of the track structure, and the second vertical adjustment structure is connected to the second end of the track structure.

[0011] In some embodiments, the first vertical adjustment structure includes a first leg, a first screw and a first connecting portion, the first connecting portion is rotatably connected to the first end of the track structure, the first connecting portion has a first threaded hole that matches the first screw, the first screw is inserted into the first threaded hole, and the first leg is connected to the first screw. The second vertical adjustment structure includes a second leg, a second screw and a second connecting portion, the second connecting portion is rotatably connected to the second end of the track structure, the second connecting portion has a second threaded hole that matches the second screw, the second screw is inserted into the second threaded hole, and the second leg is connected to the second screw.

[0012] In some embodiments, the first roller structure includes a plurality of first wire collecting grooves, and the plurality of first wire collecting grooves are all annular grooves and are arranged in parallel.

[0013] In some embodiments, the second roller assembly includes a second roller structure and a second mounting seat structure, the second mounting seat structure is connected to the track structure, and the second roller structure is rotatably connected to the second mounting seat structure.

[0014] In some embodiments, the second drum structure includes a plurality of second wire collecting grooves, each of which is an annular groove and is arranged in parallel, and the plurality of second wire collecting grooves are arranged in one-to-one correspondence with the plurality of first wire collecting grooves.

[0015] In some embodiments, the hub further includes a third roller assembly connected to the frame assembly, the third roller assembly including an inlet groove and an outlet groove, and a predetermined distance is provided between the inlet groove and the outlet groove along the axis direction of the third roller assembly.

[0016] According to another aspect of the present application, a plastic pipe production line is provided. The plastic pipe production line adopts the above-mentioned hub. The plastic pipe production line includes a production component and a processing component. The frame component is arranged between the production component and the processing component.

[0017] Through the above technical scheme, the hub and plastic pipe production line provided by the present application, the plastic pipe is wound on the first roller assembly and the second roller assembly in sequence, when the subsequent process of the hub fails, the first roller assembly is controlled to collect the material, and the second roller assembly stops discharging the material, and the first roller assembly moves away from the second roller assembly along the track structure under the action of gravity, the distance between the first roller assembly and the second roller assembly increases, and the maximum storage capacity of the hub increases. During the inspection and maintenance of the subsequent process, the previous production process can still continue without worrying about the problem of material overflow. The technical scheme of the present application effectively solves the problem in the prior art that in the plastic pipe production process, the subsequent process of the hub fails, resulting in the suspension of the previous production process of the hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the main structure of the hub disclosed in the embodiment of the present application is shown;

[0020] Figure 2 Shows Figure 1 A schematic structural diagram of a first roller assembly of a hub;

[0021] Figure 3 Shows Figure 1 A schematic structural diagram of a second roller assembly of a hub;

[0022] Figure 4 Shows Figure 1 Schematic diagram of the structure of the third roller assembly of the hub.

[0023] Description of reference numerals:

[0024] 10. Frame assembly; 11. Track structure; 12. First vertical adjustment structure; 121. First support leg; 122. First connecting portion; 13. Second vertical adjustment structure; 131. Second support leg; 132. Second connecting portion; 20. First roller assembly; 21. First roller structure; 211. First wire collecting trough; 22. First mounting seat structure; 23. Roller structure; 231. Rolling section; 232. Limiting section; 30. Second roller assembly; 31. Second roller structure; 311. Second wire collecting trough; 32. Second mounting seat structure; 40. Third roller assembly; 41. Inlet trough; 42. Outlet trough. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments of the present application, but includes all technical solutions that fall within the scope of the claims.

[0026] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0027] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do 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 this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0029] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0030] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0032] like Figures 1 to 4 As shown, in the technical solution of this embodiment, a frame assembly 10, a first roller assembly 20 and a second roller assembly 30, the frame assembly 10 includes a track structure 11, the track structure 11 is tilted, the height of the first end of the track structure 11 in the vertical direction is higher than the height of the second end of the track structure 11 in the vertical direction, the first roller assembly 20 is movably connected to the track structure 11, the second roller assembly 30 is connected to the track structure 11, the second roller assembly 30 is located on the side of the first roller assembly 20 away from the second end of the track structure 11, and the plastic tube is wound around the first roller assembly 20 and the second roller assembly 30.

[0033] By applying the technical solution of this embodiment, the plastic pipe is wound on the first roller assembly 20 and the second roller assembly 30 in sequence. When the subsequent process of the hub fails, the first roller assembly 20 is controlled to collect the material, and the second roller assembly 30 stops discharging the material. Under the action of gravity, the first roller assembly 20 moves away from the second roller assembly 30 along the direction of the track structure 11, and the distance between the first roller assembly 20 and the second roller assembly 30 increases. The maximum storage capacity of the hub increases. During the inspection and maintenance of the subsequent process, the previous production process can still continue without worrying about the problem of material overflow. The technical solution of this embodiment effectively solves the problem in the prior art that in the production process of plastic pipes, the subsequent process of the hub fails, resulting in the suspension of the previous production process of the hub.

[0034] like Figure 1 and Figure 2As shown, in the technical solution of this embodiment, the first roller assembly 20 includes a first roller structure 21, a first mounting seat structure 22 and a roller structure 23. The first roller structure 21 is rotatably connected to the first mounting seat structure 22, and the roller structure 23 is rotatably connected to the first mounting seat structure 22. The roller structure 23 is located on the side of the first mounting seat structure 22 away from the first roller structure 21, and the roller structure 23 is movably connected to the track structure 11. The first mounting seat structure 22 includes a first mounting seat, a first mounting shaft and a first connecting portion. The first mounting shaft is connected to the first mounting seat, and the first roller structure 21 is sleeved on the first mounting shaft, and a first bearing is provided at the connection between the two. The first connecting portion is connected to the first mounting seat and is located on the side of the first mounting seat away from the first mounting shaft. The first mounting portion includes a plurality of roller structures 23, which are rotatably connected to the first mounting portion and are arranged one by one. When the plurality of roller structures 23 roll, the first mounting seat moves to drive the first roller structure 21 to move along the track structure 11, thereby changing the distance between the first roller structure 21 and the second roller structure 31 and changing the storage amount of the hub.

[0035] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the roller structure 23 includes a rolling section 231 and a limiting section 232. The limiting section 232 includes two limiting sections 232, which are connected to the roller structure 23 and arranged at both ends of the rolling section 231. The diameter of the limiting section 232 is larger than the diameter of the rolling section 231, and the track structure 11 is partially arranged between the two limiting sections 232. The track structure 11 is composed of a steel plate connected in the middle of two C-shaped steel bars. The limiting sections 232 of the roller structure 23 are respectively located on the inner side and the outer side of the C-shaped steel bars. The C-shaped steel bars limit the movement of the roller structure 23 along its axis direction, and the rolling section rolls along the C-shaped steel bars. The multiple roller structures 23 are respectively matched with the two C-shaped steel bars, which further ensures the balance of the first mounting seat structure 22 and prevents the first mounting seat structure 22 from falling off.

[0036] like Figure 1As shown, in the technical solution of this embodiment, the frame assembly 10 also includes a first vertical adjustment structure 12 and a second vertical adjustment structure 13. The first vertical adjustment structure 12 is connected to the first end of the track structure 11, and the second vertical adjustment structure 13 is connected to the second end of the track structure 11. The first vertical adjustment structure 12 is rotatably connected to the first end of the track structure 11, and the second vertical adjustment structure 13 is rotatably connected to the second end of the track structure 11. The first vertical adjustment structure 12 and the second vertical adjustment structure 13 adjust the height of the first end of the track structure 11 and the second end of the track structure 11 in the vertical direction in half, thereby changing the height of the entire track structure 11 in the vertical direction and the angle between the track structure 11 and the horizontal direction. Due to the different inclination angles of the track structure 11, the rolling speed of the first roller assembly 20 is different. Adjusting the inclination angle of the track structure 11 makes the hub suitable for different working conditions and more versatile.

[0037] like Figure 1 As shown, in the technical solution of this embodiment, the first vertical adjustment structure 12 includes a first support leg 121, a first screw and a first connecting portion 122, the first connecting portion 122 is rotatably connected to the first end of the track structure 11, the first connecting portion 122 has a first threaded hole matched with the first screw, the first screw is inserted into the first threaded hole, the first support leg 121 is connected to the first screw, the second vertical adjustment structure 13 includes a second support leg 131, a second screw and a second connecting portion 132, the second connecting portion 132 is rotatably connected to the second end of the track structure 11, the second connecting portion 132 has a second threaded hole matched with the second screw, the second screw is inserted into the second threaded hole, and the second support leg 131 is connected to the second screw. When the first screw is rotated, since the first screw is matched with the first connection part 122, the height of the first connection part 122 in the vertical direction changes, the height of the first end of the track structure 11 in the vertical direction changes, and the projection of the first screw along its axial direction is located inside the projection of the first support foot 121 along the axial direction of the first screw. The setting of the first support foot 121 increases the contact area between the first vertical adjustment structure 12 and the ground, ensuring the stability of the support. When the second screw is rotated, since the second screw is matched with the second connection part 132, the height of the second connection part 132 in the vertical direction changes, the height of the second end of the track structure 11 in the vertical direction changes, and the projection of the second screw along its axial direction is located inside the projection of the second support foot 131 along the axial direction of the second screw. The setting of the second support foot 131 increases the contact area between the second vertical adjustment structure 13 and the ground, ensuring the stability of the support.

[0038] like Figure 1 and Figure 2As shown, in the technical solution of this embodiment, the first roller structure 21 includes a plurality of first wire collecting grooves 211, and the plurality of first wire collecting grooves 211 are all annular grooves and are arranged in parallel. The arrangement of the plurality of first wire collecting grooves 211 increases the maximum storage capacity of the entire hub, and the materials are dispersed into the plurality of different first wire collecting grooves 211 more neatly, ensuring the smooth rotation of the first roller structure 21.

[0039] like Figure 1 and Figure 3 As shown, in the technical solution of this embodiment, the second roller assembly 30 includes a second roller structure 31 and a second mounting seat structure 32, the second mounting seat structure 32 is connected to the track structure 11, and the second roller structure 31 is rotatably connected to the second mounting seat structure 32. The second mounting seat structure 32 includes a second mounting seat, a second mounting shaft and a second connecting portion, the second mounting shaft is connected to the second mounting seat, the second roller structure 31 is sleeved on the second mounting shaft, and a second bearing is provided at the connection between the two, the second connecting portion is connected to the second mounting seat and is located on the side of the second mounting seat away from the second mounting shaft. The second mounting portion is a stud, and the second mounting portion includes a plurality of them, and the plurality of second mounting portions are evenly distributed on both sides of the track structure 11 and fixed by nuts, and the nuts and the second mounting seat work together to fix the second roller assembly 30 on the track structure 11. The second roller assembly 30 is fixed, and the first roller assembly 20 can move along the track structure 11, and the distance between the two can be changed, thereby changing the storage capacity of the hub.

[0040] like Figure 1 and Figure 3 As shown, in the technical solution of this embodiment, the second roller structure 31 includes a plurality of second wire collecting grooves 311, which are all annular grooves and are arranged in parallel, and the plurality of second wire collecting grooves 311 are arranged one-to-one with the plurality of first wire collecting grooves 211. The arrangement of the plurality of second wire collecting grooves 311 increases the maximum storage capacity of the entire hub, and the materials are dispersed and packed into the plurality of different second wire collecting grooves 311 more neatly, ensuring the smooth rotation of the second roller structure 31.

[0041] like Figure 1 and Figure 4As shown, in the technical solution of this embodiment, the hub further includes a third roller assembly 40, which is connected to the frame assembly 10, and includes an inlet groove 41 and an outlet groove 42, and a predetermined distance is provided between the inlet groove 41 and the outlet groove 42 along the axis direction of the third roller assembly 40. The third roller assembly 40 is fixed on the frame assembly 10, and the inlet groove 41 and the outlet groove 42 are provided to guide the plastic pipe to prevent the plastic pipe from being misplaced. During the installation of the plastic pipe, the first end of the plastic pipe is wound half a circle on the third roller assembly 40 along the inlet groove 41 and below the third roller assembly 40, and then wound in the clockwise direction as shown in the figure to the first first collection groove 211 of the first roller assembly 20, the first second collection groove 311 of the second roller assembly 30, the second first collection groove 211 of the first roller assembly 20, the second second collection groove 311 of the second roller assembly 30, and so on, and the wire is discharged from the outlet groove 42 and connected to the processing equipment. When the feed speed is greater than the discharge speed, the first roller assembly 20 moves downward along the track structure 11 under the action of gravity; when the feed speed is less than the discharge speed, the plastic pipe is tightened, and the first roller assembly 20 moves upward along the track structure 11 under the action of tension. During the whole process, the plastic pipe always maintains a certain tension, and the discharge of the plastic pipe is stable. A photoelectric sensor is provided on the track structure 11 , and the photoelectric sensor senses the position of the first roller assembly 20 , and adjusts the rotation speed of the first roller assembly 20 according to the position, thereby further ensuring the stability of the discharge speed.

[0042] like Figure 1 and Figure 4 As shown, in the technical solution of this embodiment, the plastic pipe production line adopts the above-mentioned hub, and the plastic pipe production line includes a production component and a processing component, and the rack component 10 is arranged between the production component and the processing component. The hub is placed between the production component and the processing component, and the plastic pipe produced by the production component enters the hub through the inlet groove 41, and is wound according to the regulations and passed through the outlet groove 42 and connected to the processing component. The stock volume of the hub is adjusted in time according to the production speed of the production component and the processing speed of the processing component so that the inlet and outlet lines are kept stable.

[0043] From the above, it can be known that when the incoming material is in the front section, it will be wound half a circle from bottom to top from the inner track (inlet groove 41) of the inlet and outlet roller (third roller assembly 40), and then it will be wound around the inner track of the movable roller (first roller assembly 20), and then it will be wound around the fixed roller (second roller assembly 30) and the movable roller from inside to outside to the outermost track of the fixed roller, and then it will be wound around the outer track of the inlet and outlet roller (outlet groove 42) and pulled into the rear section equipment. Through the gravity of the movable roller itself, a continuous and constant tensioning force is applied to the product. When the winding speed is lower than the discharge speed, the drip irrigation belt can be tightened. When the winding speed is greater than the discharge speed, the tension of the drip irrigation belt and the gravity of the movable roller will pull the movable roller toward the fixed roller. A plurality of photoelectric switches are installed on the track beam (track structure 11) to detect the position of the movable roller, and the rotation speed of the rear section winding is adjusted through its signal feedback, so as to achieve stable and constant speed winding of the material. By placing rollers (first roller assembly 20 and second roller assembly 30) horizontally and attaching multiple tracks (first wire collecting groove 211 and second wire collecting groove 311), the storage capacity of the hub is increased; the tension of the hub is controlled by gravity, thereby reducing production costs.

[0044] So far, the embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution of the present application.

[0045] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A hub, characterized in that: include: A frame assembly (10), the frame assembly (10) comprising a track structure (11), the track structure (11) being arranged at an angle, and a height of a first end of the track structure (11) in the vertical direction being higher than a height of a second end of the track structure (11) in the vertical direction; A first roller assembly (20), the first roller assembly (20) being movably connected to the track structure (11); A second roller assembly (30), the second roller assembly (30) is connected to the track structure (11), the second roller assembly (30) is located on a side of the second end of the first roller assembly (20) away from the track structure (11), and a plastic tube is wound around the first roller assembly (20) and the second roller assembly (30).

2. The hub according to claim 1, characterized in that: The first roller assembly (20) comprises a first roller structure (21), a first mounting seat structure (22) and a roller structure (23); the first roller structure (21) is rotatably connected to the first mounting seat structure (22); the roller structure (23) is rotatably connected to the first mounting seat structure (22); the roller structure (23) is located on a side of the first mounting seat structure (22) away from the first roller structure (21); and the roller structure (23) is movably connected to the track structure (11).

3. The hub according to claim 2, characterized in that: The roller structure (23) comprises a rolling segment (231) and a limiting segment (232), the limiting segment (232) comprising two, the two limiting segments (232) being connected to the roller structure (23) and arranged at two ends of the rolling segment (231), the diameter of the limiting segment (232) being greater than the diameter of the rolling segment (231), and the track structure (11) being partially arranged between the two limiting segments (232).

4. The hub according to claim 1, characterized in that: The frame assembly (10) further comprises a first vertical adjustment structure (12) and a second vertical adjustment structure (13), wherein the first vertical adjustment structure (12) is connected to a first end of the track structure (11), and the second vertical adjustment structure (13) is connected to a second end of the track structure (11).

5. The hub according to claim 4, characterized in that: The first vertical adjustment structure (12) comprises a first support leg (121), a first screw rod and a first connecting portion (122), wherein the first connecting portion (122) is rotatably connected to the first end of the track structure (11), the first connecting portion (122) has a first threaded hole matched with the first screw rod, the first screw rod is inserted into the first threaded hole, and the first support leg (121) is connected to the first screw rod. The second vertical adjustment structure (13) comprises a second support leg (131), a second screw rod and a second connecting portion (132), the second connecting portion (132) is rotatably connected to the second end of the track structure (11), the second connecting portion (132) has a second threaded hole matched with the second screw rod, the second screw rod is inserted into the second threaded hole, and the second support leg (131) is connected to the second screw rod.

6. The hub according to claim 2, characterized in that: The first drum structure (21) comprises a plurality of first wire collecting grooves (211), and the plurality of first wire collecting grooves (211) are all annular grooves and are arranged in parallel.

7. The hub according to claim 6, characterized in that: The second roller assembly (30) comprises a second roller structure (31) and a second mounting seat structure (32); the second mounting seat structure (32) is connected to the track structure (11); and the second roller structure (31) is rotatably connected to the second mounting seat structure (32).

8. The hub according to claim 7, characterized in that: The second drum structure (31) comprises a plurality of second wire collecting grooves (311), the plurality of second wire collecting grooves (311) are all annular grooves and are arranged in parallel, and the plurality of second wire collecting grooves (311) are arranged in one-to-one correspondence with the plurality of first wire collecting grooves (211).

9. The hub according to claim 1, characterized in that: The hub also includes a third roller assembly (40), the third roller assembly (40) is connected to the frame assembly (10), the third roller assembly (40) includes an inlet groove (41) and an outlet groove (42), and a predetermined distance is provided between the inlet groove (41) and the outlet groove (42) along the axial direction of the third roller assembly (40).

10. A plastic pipe production line, characterized in that: The plastic pipe production line adopts the hub described in any one of claims 1 to 9, and the plastic pipe production line includes a production component and a processing component, and the frame component (10) is arranged between the production component and the processing component.

Images