A lithium iron phosphate sintered powder discharging device

Abstract

The present invention discloses a lithium iron phosphate sintered powder discharging device, which relates to the field of material conveying technology, including: a transfer mechanism including a first linear travel mechanism provided on a U-shaped seat, a plurality of slides arranged in an array, and a plurality of plug-ins, the first linear travel mechanism connecting the plurality of slides, two support plates provided on top of the slides, a rotating shaft provided for rotation between the two support plates, one end of the rotating shaft being fixedly connected to the corresponding plug-in plate; a conveying platform conveying a plurality of saggers toward the direction of a material receiving box, a window provided on one side of the conveying tail end of the conveying platform, and a slot provided on the side of the saggers facing the window; a second linear travel mechanism provided in the support seat, the second linear travel mechanism connected to the U-shaped seat, for moving the U-shaped seat so that the plug-in plate is inserted into the corresponding slot; the first linear travel mechanism is used to translate the plurality of saggers at the window to above the material receiving box, and a flipping mechanism provided on the U-shaped seat, which is connected to the plurality of rotating shafts for driving the plurality of rotating shafts. This solution can flip and discharge a plurality of saggers at the same time.

Description

Technical Field

[0001] The present invention relates to a material conveying technology, in particular to a material turning and discharging device, and is specifically related to a lithium iron phosphate sintered powder discharging device. Background Art

[0002] The lithium iron phosphate production process is as follows: raw materials are mixed to form a precursor powder; the precursor powder is loaded into a sagger; the precursor powder is leveled and then separated into multiple pieces using a crisscrossing cutter; multiple saggers are sequentially transferred to a kiln for sintering; after sintering, the saggers are sequentially transported to a tilting discharge device, which pours out the sintered powder inside. The problem is that the tilting discharge device in the existing technology can only hold one sagger at a time and tilt it to discharge the powder, and cannot tilt and discharge multiple saggers simultaneously. Summary of the Invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides a lithium iron phosphate sintered powder discharging device, which can simultaneously turn over and discharge multiple saggers.

[0004] In order to achieve the purpose of the present invention, the following scheme is proposed:

[0005] A lithium iron phosphate sintered powder discharging device comprises a conveying platform, a turning mechanism, a transfer mechanism, and a material receiving box.

[0006] The transfer mechanism includes a first linear travel mechanism provided on a U-shaped seat, a plurality of sliders arranged in an array, and a plurality of insert plates. The first linear travel mechanism simultaneously connects the plurality of sliders. Two support plates are provided on the top of the sliders. A rotating shaft is provided between the two support plates. One end of the rotating shaft passes through the support plates and is fixedly connected to the corresponding insert plate.

[0007] The conveying platform is arranged at the outer end of the receiving box, and is used to convey multiple saggers toward the receiving box. A window is provided on one side of the conveying tail end of the conveying platform, which is used to avoid multiple plug-ins. The bottom surface of the window is higher than the table surface of the conveying platform, and a slot is provided on the side of the sagger facing the window.

[0008] The U-shaped seat is arranged on the top of the support seat, and a second linear travel mechanism is arranged in the support seat. The second linear travel mechanism is connected to the U-shaped seat and is used to move the U-shaped seat so that the plug-in board is inserted into the corresponding slot;

[0009] A first inclined surface is provided on the outer end of the slot and on the side facing the material receiving box, and a second inclined surface is provided on the end of the inserting plate. When the second inclined surface contacts and squeezes the corresponding first inclined surface, it is used to expand the distance between two adjacent saggers;

[0010] The first linear travel mechanism is used to translate the multiple saggers at the window to above the material receiving box. The turning mechanism is arranged on the U-shaped seat, which is connected to the multiple rotating shafts and is used to drive the multiple rotating shafts.

[0011] The beneficial effects of the present invention are as follows: the structure of the existing sagger is improved, and a slot of a special shape is provided on one side thereof; the distance between two adjacent saggers can be adjusted by squeezing the insert plate and the inclined surface of the slot, and at this time the insert plate plays the role of adjusting the distance between the saggers, so that the sagger can be flipped and discharged later; after the insert plate is fully inserted into the corresponding slot, the insert plate plays the function of carrying and transferring, and the first linear stroke mechanism can be used to translate multiple insert plates and multiple saggers to the top of the material receiving box, and then the flip mechanism can be used to flip the multiple insert plates, thereby realizing the flipping and discharging of multiple saggers, and the structural coordination is very clever. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Shows the structural diagram of the discharging device;

[0013] Figure 2 Shows a top view of the discharge device;

[0014] Figure 3 Shown is a diagram of the sagger structure;

[0015] Figure 4 Shown is a schematic diagram of a slot for a sagger;

[0016] Figure 5 Shows the connection structure diagram of the slider, control rod, guide rod, worm wheel and worm;

[0017] Figure 6 Shows a front view of the discharge device with a baffle and a pressure rod;

[0018] Figure 7 It shows a state diagram in which the pressure rod causes the baffle to flip;

[0019] Figure 8 It shows the state diagram of the board just being inserted into the slot;

[0020] Figure 9 A diagram showing a state where the board is fully inserted into the slot;

[0021] Figure 10 A diagram showing a state in which a plurality of saggers are moved above a receiving box;

[0022] Figure 11 It shows the state diagram of the sagger turning over and discharging;

[0023] Figure 12 Shows a right side view of the conveying channel conveying sagger;

[0024] Figure numerals: conveying platform-1, window-11, extension plate-12, baffle-13, turning mechanism-2, motor-21, regulating rod-22, main rod-221, convex strip-222, worm gear-23, worm-24, transfer mechanism-3, first linear stroke mechanism-31, slider-32, support plate-321, rotating shaft-322, groove-323, insert plate-33, second inclined surface-331, U-shaped seat-34, guide rod-341, second linear stroke mechanism-36, inverted L-shaped plate-37, pressure rod-38, support seat-39, sagger-4, slot-41, first inclined surface-411, material receiving box-5, conveying channel-6, conveying wheel-61. DETAILED DESCRIPTION

[0025] like Figure 1 As shown, this embodiment provides a lithium iron phosphate sintered powder discharging device, including a conveying platform 1, a turning mechanism 2, a transfer mechanism 3, and a material receiving box 5.

[0026] Specifically, such as Figure 1 As shown, the conveying platform 1 is located at the outer end of the material receiving box 5, and the surface of the conveying platform 1 is higher than the material receiving box 5. The conveying platform 1 is used to convey multiple saggers 4 toward the direction of the material receiving box 5. The saggers 4 contain sintered materials. A window 11 is provided on one side of the conveying tail end of the conveying platform 1. The bottom surface of the window 11 is higher than the surface of the conveying platform 1. The purpose of this design is: at the window 11, the inner wall of the conveying platform 1 still has a limiting effect on the sagger 4.

[0027] Specifically, such as Figure 1 、 Figure 3 、 Figure 4 As shown, a slot 41 is provided on the side of the sagger 4 facing the window 11, and a first inclined surface 411 is provided on the outer end of the slot 41 and the side facing the material receiving box 5. The width of the outer end of the slot 41 is greater than the width of the inner end of the slot 41 (as shown in FIG. Figure 4 as shown).

[0028] Specifically, such as Figure 2-Figure 4As shown, the transfer mechanism 3 includes a U-shaped seat 34, a first linear stroke mechanism 31, three sliders 32, three insert plates 33, a support seat 39 and a second linear stroke mechanism 36. The second linear stroke mechanism 36 is arranged in the support seat 39, the U-shaped seat 34 is arranged on the top of the support seat 39, and the bottom surface of the U-shaped seat 34 is close to the support seat 39. The second linear stroke mechanism 36 is connected to the U-shaped seat 34 and is used to move the U-shaped seat 34 in the direction of the conveying platform 1. The moving direction of the U-shaped seat 34 is perpendicular to the conveying direction of the conveying platform 1. The first linear stroke mechanism 31 is arranged on the top of the U-shaped seat 34. The three sliders 32 are arranged in an array along the long axis direction of the first linear stroke mechanism 31. The first linear stroke mechanism 31 is simultaneously connected to the three sliders 32 for horizontal movement. The three sliders 32 are moved, and the moving directions of the three sliders 32 are parallel to the conveying direction of the conveying platform 1. The bottom surface of the slider 32 is close to the U-shaped seat 34. Two support plates 321 are provided on the top of the slider 32. A rotating shaft 322 is provided for rotation between the two support plates 321. One end of the rotating shaft 322 passes through the support plate 321 and is fixedly connected to the corresponding plug plate 33. The plug plate 33 points horizontally to the window 11. The window 11 is used to avoid the three plug plates 33. A second inclined surface 331 is provided at the end of the plug plate 33 and toward the side of the material receiving box 5. When the plug plate 33 is inserted into the corresponding slot 41 and the second inclined surface 331 squeezes the corresponding first inclined surface 411, it is used to expand the distance between the two adjacent saggers 4 so that the sagger 4 on the plug plate 33 can be flipped and discharged later.

[0029] It should be noted here that the first linear travel mechanism 31 and the second linear travel mechanism 36 are both conventional mechanisms, such as using a telescopic rod driven by a pneumatic cylinder or an oil cylinder, and the present invention will not elaborate on their structures and principles in detail.

[0030] Specifically, the flip mechanism 2 is disposed on the U-shaped seat 34 , and the flip mechanism 2 is connected to the three rotating shafts 322 to drive the three rotating shafts 322 .

[0031] Here’s how to use it:

[0032] S1 . The conveying platform 1 conveys a plurality of saggers 4 toward the receiving box 5 and stops the saggers 4 at specific positions. Note that the slots 41 of the saggers 4 all face the window 11 .

[0033] S2, the second linear travel mechanism 36 moves the U-shaped seat 34 toward the direction of the conveying platform 1, and the first linear travel mechanism 31, three sliders 32 and three inserting plates 33 on the U-shaped seat 34 move as a whole with the U-shaped seat 34. The inserting plates 33 pass through the window 11 and gradually insert into the corresponding slots 41. Figure 8For example, there are three saggers 4 at the window 11, and the second inclined surface 331 of the left inserting plate 33 first contacts the first inclined surface 411 of the left sagger 4. At this time, the second inclined surface 331 of the middle inserting plate 33 has not yet contacted the first inclined surface 411 of the middle sagger 4, and the second inclined surface 331 of the right inserting plate 33 has not yet contacted the first inclined surface 411 of the right sagger 4. To be more precise, at this time, the right inserting plate 33 is directly aligned with the inner end of the slot 41 of the right sagger 4; in the following process, the left inserting plate 33 first squeezes the left sagger 4 to cause the left sagger 4 to move to the left, and then the middle inserting plate 33 squeezes the middle sagger 4 to cause the middle sagger 4 to move to the left, and the moving distance of the left sagger 4 is greater than the moving distance of the middle sagger 4, and the right inserting plate 33 is directly inserted into the inner end of the slot 41 of the right sagger 4; Figure 9 At this time, the three inserting plates 33 are completely inserted into the corresponding slots 41 , and there is a gap between two adjacent saggers 4 .

[0034] S3, the first linear travel mechanism 31 moves the three sliders 32 and the three inserting plates 33 toward the direction of the receiving box 5 until the three saggers 4 are translated to the top of the receiving box 5. Figure 10 shown.

[0035] S4. The turning mechanism 2 drives the three rotating shafts 322 simultaneously, causing the three saggers 4 to turn over and discharge the materials.

[0036] S5. The three saggers 4 are separated from the inserting plate 33 by a pushing mechanism or other means.

[0037] S6, the conveying platform 1 continues to convey multiple saggers 4 toward the receiving box 5. At the same time, the second linear travel mechanism 36 resets the U-shaped seat 34, and the first linear travel mechanism 31 resets the three sliders 32, and the state is restored to Figure 1 , start the next cycle.

[0038] In step S1, the conveying platform 1 stops the sagger 4 at a specific position, which is specifically implemented as follows:

[0039] like Figure 6 As shown, a baffle 13 is provided on the end face of the conveying tail end of the conveying platform 1, and the bottom end of the baffle 13 is rotatably connected to the conveying platform 1. A torsion spring is provided at the rotation connection between the baffle 13 and the conveying platform 1, which is used to keep the baffle 13 in a vertical state. The baffle 13 is used to stop the sagger 4 on the conveying platform 1, and a horizontal pressure rod 38 is provided on the inverted L-shaped plate 37 corresponding to the position of the baffle 13. The top surface of the pressure rod 38 is flush with the table surface of the conveying platform 1. When the insert plate 33 moves toward the direction of the sagger 4, the pressure rod 38 is used to flip the baffle 13 toward the extension plate 12, thereby releasing the restriction of the baffle 13 on the sagger 4.

[0040] Also note two points:

[0041] First, when the inserting plate 33 moves toward the direction where the sagger 4 is located, before the second inclined surface 331 of the inserting plate 33 contacts the corresponding first inclined surface 411, the blocking bar 13 has been flipped to a horizontal state (eg, Figure 8 As shown), it is convenient to adjust the spacing of the sagger 4 next;

[0042] Second, when the three insert plates 33 are fully inserted into the corresponding slots 41, the adjustment of the spacing between the three saggers 4 is completed. At this time, there is a gap between two adjacent saggers 4, and the width of the gap is smaller than the thickness of the baffle 13. The purpose of this design is: in the process of the three saggers 4 moving toward the material receiving box 5, even if the pressure rod 38 has disengaged from the baffle 13, the baffle 13 will be pressed by the three saggers 4, and the baffle 13 will not flip up from the gap between the three saggers 4 until the three saggers 4 are completely separated from the conveying platform 1. The baffle 13 will flip up under the action of the torsion spring and return to the vertical state.

[0043] In step S3, during the translation of the sagger 4 from the conveying platform 1 to above the material receiving box 5, in order to further improve the stability of the sagger 4 during the translation process, this embodiment adopts the following measures:

[0044] First, as Figure 5 、 Figure 6 、 Figure 9 As shown, the inserting plate 33 is connected to the corresponding rotating shaft 322 through the inverted L-shaped plate 37, and the inserting plate 33 is connected to the end surface of the transverse section of the inverted L-shaped plate 37, and the outer wall of the longitudinal section of the inverted L-shaped plate 37 is connected to the rotating shaft 322. The thickness of the end surface of the transverse section of the inverted L-shaped plate 37 is greater than the height of the slot 41. When the inserting plate 33 is fully inserted into the corresponding slot 41, the end surface of the transverse section of the inverted L-shaped plate 37 is in close contact with the sagger 4.

[0045] Second, if Figure 2 、 Figure 10 As shown, the end face of the conveying tail end of the conveying platform 1 is provided with an extension plate 12, which extends horizontally to the material receiving box 5, and the extension plate 12 is located above the material receiving box 5. In the process of the first linear stroke mechanism 31 moving the three saggers 4 to the top of the material receiving box 5, the side of the sagger 4 facing away from the window 11 is close to the extension plate 12.

[0046] The restriction of the sagger 4 by the end face of the transverse section of the inverted L-shaped plate 37 and the extension plate 12 greatly improves the stability of the sagger 4 during translation, and also improves the stability of the sagger 4 during the flipping and discharging process; Figure 11 As shown, after the sagger 4 is turned over 180 degrees, the position of the sagger 4 is lower than the extension plate 12, which is convenient for separating the sagger 4 in the next step.

[0047] In step S4, the flip mechanism 2 is specifically implemented as follows: Figure 2 、 Figure 5As shown, the flip mechanism 2 includes a motor 21, a regulating rod 22, three worm wheels 23 and three worms 24. The regulating rod 22 is rotatably arranged between the two inner walls of the U-shaped seat 34. The motor 21 is arranged at the outer end of the U-shaped seat 34. The output shaft of the motor 21 is used to drive the regulating rod 22. The regulating rod 22 includes a main rod 221 and two convex strips 222 arranged on the side wall of the main rod 221. The regulating rod 22 passes through the first through holes of the three sliders 32. The maximum outer diameter of the regulating rod 22 is greater than the inner diameter of the first through hole, thereby ensuring that the regulating rod 22 can The slider 32 rotates in the first through hole, and the slider 32 can also slide along the regulating rod 22. In order to further improve the stability of the slider 32, a guide rod 341 is provided between the two inner walls of the U-shaped seat 34. The guide rod 341 passes through the second through holes of the three sliders 32. The three worms 24 are coaxial and slidably arranged on the regulating rod 22. A groove 323 is provided on the top of the slider 32. The worm 24 is limited in the corresponding groove 323. The worm wheel 23 is coaxial and fixed on the corresponding rotating shaft 322. The worm wheel 23 is engaged with the corresponding worm 24.

[0048] The principle of the flipping mechanism 2 is: when the three plug plates 33 are fully inserted into the corresponding slots 41, the first linear stroke mechanism 31 moves the three sliders 32 and the three plug plates 33 toward the direction of the material receiving box 5, and the three worms 24 and the three worm wheels 23 will move along the regulating rod 22 together with the slider 32; when the three plug plates 33 and the three saggers 4 are translated to above the material receiving box 5, the motor 21 drives the regulating rod 22, and the regulating rod 22 will not cause the slider 32 to rotate, but the regulating rod 22 will cause the three worms 24 to rotate synchronously, and the worm 24 will then cause the worm wheel 23 and the plug plates 33 to rotate, thereby realizing the flipping and discharging of the three saggers 4.

[0049] In step S5, the three saggers 4 are separated from the inserting plate 33, and the specific implementation method is as follows: Figure 10-12 As shown, the device also includes three parallel conveying channels 6, which are arranged on the support frame. The conveying channels 6 are located outside the material receiving box 5, and the bottom of the conveying channels 6 is suspended. Conveying wheels 61 are arrayed on the inner walls on both sides. The operation principle of the conveying wheels 61 belongs to the existing technology and will not be elaborated here. The conveying direction of the conveying channel 6 is perpendicular to the conveying direction of the conveying platform 1, and is used to receive and convey the saggers 4 that have completed the discharge, and one sagger 4 corresponds to one conveying channel 6.

[0050] The method is as follows: above the material receiving box 5, when the three saggers 4 are turned over to discharge the material, the openings of the saggers 4 face downwards and the saggers 4 are lower than the bottom surface of the extension plate 12 (such as Figure 11 Then, the second linear travel mechanism 36 is used to continue to move the U-shaped seat 34 toward the direction of the conveying platform 1. The first linear travel mechanism 31, three sliders 32 and three inserting plates 33 on the U-shaped seat 34 move as a whole with the U-shaped seat 34 until the sagger 4 is delivered to the corresponding conveying channel 6. The conveying wheel 61 starts to operate and separates the sagger 4 from the inserting plates 33.

[0051] As mentioned above, the bottom of the conveying channel 6 is suspended, and the sagger 4 in the conveying channel 6 is in a downward-opening state. The purpose of this design is that the inner wall of the sagger may have residual materials that need to be cleaned. The opening of the sagger 4 is downward, which makes it easy to use cleaning equipment to clean the inner wall of the sagger 4.

[0052] The above embodiments are only used to illustrate the technical ideas and features of the present invention and are not intended to be exclusive or limit the present invention. It should be understood by those skilled in the art that various changes or equivalent substitutions made to the present invention without departing from the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A lithium iron phosphate sintered powder discharging device, characterized in that: It includes a conveying platform (1), a turning mechanism (2), a transfer mechanism (3), and a material receiving box (5); The transfer mechanism (3) includes a first linear travel mechanism (31) provided on a U-shaped seat (34), a plurality of sliders (32) arranged in an array, and a plurality of inserting plates (33). The first linear travel mechanism (31) is connected to the plurality of sliders (32) at the same time. Two support plates (321) are provided on the top of the slider (32). A rotating shaft (322) is provided between the two support plates (321). One end of the rotating shaft (322) passes through the support plate (321) and is fixedly connected to the corresponding inserting plate (33). A conveying platform (1) is provided at the outer end of the receiving box (5) and is used to convey a plurality of saggers (4) toward the receiving box (5). A window (11) is provided on one side of the conveying tail end of the conveying platform (1) for avoiding a plurality of inserting plates (33). The bottom surface of the window (11) is higher than the table surface of the conveying platform (1). A slot (41) is provided on the side of the saggers (4) facing the window (11). The U-shaped seat (34) is arranged on the top of the support seat (39), and a second linear travel mechanism (36) is provided in the support seat (39). The second linear travel mechanism (36) is connected to the U-shaped seat (34) and is used to move the U-shaped seat (34) so that the inserting plate (33) is inserted into the corresponding slot (41); A first inclined surface (411) is provided on the outer end of the slot (41) and on the side facing the material receiving box (5), and a second inclined surface (331) is provided on the end of the inserting plate (33). When the second inclined surface (331) contacts and presses the corresponding first inclined surface (411), the distance between two adjacent saggers (4) is expanded. The first linear travel mechanism (31) is used to translate the plurality of saggers (4) at the window (11) to above the material receiving box (5); the turning mechanism (2) is provided on the U-shaped seat (34), which is connected to the plurality of rotating shafts (322) and is used to drive the plurality of rotating shafts (322); The inserting plate (33) is connected to the corresponding rotating shaft (322) through the inverted L-shaped plate (37), and the inserting plate (33) is connected to the end face of the transverse section of the inverted L-shaped plate (37), and the outer wall of the longitudinal section of the inverted L-shaped plate (37) is connected to the rotating shaft (322). The thickness of the end face of the transverse section of the inverted L-shaped plate (37) is greater than the height of the slot (41). When the inserting plate (33) is fully inserted into the corresponding slot (41), the end face of the transverse section of the inverted L-shaped plate (37) is in close contact with the sagger (4).

2. The lithium iron phosphate sintered powder discharging device according to claim 1, characterized in that: The turning mechanism (2) includes a motor (21), a regulating rod (22), a plurality of worm wheels (23) and a plurality of worms (24). The regulating rod (22) is rotatably arranged between the two inner walls of the U-shaped seat (34). The motor (21) is arranged at the outer end of the U-shaped seat (34). Its output shaft is used to drive the regulating rod (22). The regulating rod (22) includes a main rod (221) and two convex strips (222) arranged on its side wall. The regulating rod (22) passes through the first through holes of all the sliders (32). The maximum outer diameter of the regulating rod (22) is greater than the inner diameter of the first through hole. The plurality of worms (24) are coaxially and slidably arranged on the regulating rod (22). The top of the slider (32) is provided with a groove (323). The worms (24) are limited in the corresponding grooves (323). The worm wheels (23) are coaxially and fixedly arranged on the corresponding rotating shafts (322). The worm wheels (23) are meshed with the corresponding worms (24).

3. The lithium iron phosphate sintered powder discharging device according to claim 1, characterized in that: The bottom surface of the slider (32) is in close contact with the U-shaped seat (34), and a guide rod (341) is provided between two inner walls of the U-shaped seat (34). The guide rod (341) passes through the second through holes of all the sliders (32).

4. The lithium iron phosphate sintered powder discharging device according to claim 1, characterized in that: An extension plate (12) is provided on the end face of the conveying tail end of the conveying platform (1). When the first linear travel mechanism (31) moves the plurality of saggers (4) to above the material receiving box (5), the side of the saggers (4) facing away from the window (11) is in close contact with the extension plate (12).

5. The lithium iron phosphate sintered powder discharging device according to claim 4, characterized in that: The end face of the conveying tail end of the conveying platform (1) is provided with a stop bar (13), the bottom end of the stop bar (13) is rotatably connected to the conveying platform (1), and a torsion spring is provided at the rotation connection between the two, which is used to keep the stop bar (13) in a vertical state. The stop bar (13) is used to stop the sagger (4) on the conveying platform (1), and a horizontal pressure rod (38) is provided on the inverted L-shaped plate (37) corresponding to the position of the stop bar (13). The top surface of the pressure rod (38) is flush with the table surface of the conveying platform (1). When the insert plate (33) moves toward the direction of the sagger (4), the pressure rod (38) is used to flip the stop bar (13) toward the extension plate (12).

6. The lithium iron phosphate sintered powder discharging device according to claim 5, characterized in that: When the inserting plate (33) is fully inserted into the corresponding slot (41), a gap exists between two adjacent saggers (4), and the width of the gap is smaller than the thickness of the blocking bar (13).

7. The lithium iron phosphate sintered powder discharging device according to claim 5, characterized in that: The invention also includes a plurality of parallel conveying channels (6), which are arranged on a support frame and located outside a material receiving box (5). The bottom of the conveying channel (6) is suspended in the air, and conveying wheels (61) are arranged on the inner walls on both sides thereof. Above the material receiving box (5), when a plurality of saggers (4) are turned over and discharged by utilizing a turning mechanism (2), the saggers (4) are lower than the bottom surface of the extension plate (12), and one sagger (4) corresponds to one conveying channel (6), and the conveying channel (6) is used to receive and convey the saggers (4).

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