TWM585777U - Oven with swaying type conveyor device - Google Patents

Abstract

An oven is suitable for drying a plurality of workpieces respectively held by a plurality of holding members, and each holding member has two placement ends on opposite sides. The oven includes a box and a conveying device. The box has an inlet and an outlet opposite to the inlet. The conveying device includes a pair of placing members respectively disposed on the box body and at least a pair of moving mechanisms that are spaced apart from the placing members and pivotably disposed on the box body, and each placing member forms a plurality of spaced apart from each other. Placement grooves, which are respectively suitable for placing the placement ends of the retaining members. Each pushing mechanism forms a plurality of grooves and the pair of pushing mechanisms can pivot between an initial position and a pushing position. The process of pivoting the pair of pushing mechanisms from the initial position to the pushing position will be performed by the recesses. The placement ends of the slot engaging the holding member drive each holding member to move from the corresponding pair of placing slots toward the exit to the next pair of placing slots.

Description

Oven with swinging conveying device

The invention relates to an oven, in particular to an oven with a swinging conveying device.

In a conventional oven for drying circuit boards, a conveying device sends a plurality of holding members for holding circuit boards into the oven for batch baking, and each circuit board in each batch is baked. Because they are located at different positions in the oven, the heat of each circuit board is different, which will make the quality of each circuit board in each batch uneven, and then affect the yield. Therefore, how to improve such problems will be a topic worth considering.

Therefore, one of the objects of the present invention is to provide an oven for uniformly heating the workpieces.

The novel oven with a swinging conveying device is suitable for drying a plurality of workpieces respectively held by a plurality of holding members, and each holding member has two placement ends on opposite sides. The oven includes a box body having a An entrance, an exit opposite to the entrance, and an internal space connecting the entrance and the exit, the entrance and the exit defining a conveying direction; and a conveying device arranged in the box for the holders to be placed, applicable The conveying device includes a pair of retaining devices respectively disposed in the inner space of the box and extending along the conveying direction when the retaining members are conveyed from the inlet to the inner space of the box and exit the box from the exit. And at least one pair of placement mechanisms spaced apart from the placement pieces in the internal space and pivotably disposed on the box body extending along the conveying direction, each placement piece forming a plurality of spaced-apart placements Grooves, the placing grooves are respectively suitable for placing the holding ends of the holding members, each of the moving mechanisms forms a plurality of grooves, and the pair of moving mechanisms can be in an initial position and a moving position Pivoting between the pair of shifting mechanisms at the initial position when the pair of shifting mechanisms are closer to the entrance at the shifting position, and the process of the pair of shifting mechanisms pivoting from the initial position to the shifting position The placement ends of the holders engaged with the grooves will drive each holder to move from the corresponding pair of placement slots toward the exit to the next pair of placement slots.

In some implementation forms, each pushing mechanism has at least one eccentric shaft disposed on the box body and a pivot plate spaced from the placement member. The eccentric shaft is fixedly connected to the pivot plate and can be driven to pivot. The grooves are formed on the top surface of the pivot plate.

In some embodiments, the box body further has a bottom wall, and the conveying device further includes a motor disposed on the box body, a drive shaft passing through the bottom wall and connected to the motor at one end, and a pair of sleeves respectively The driving shaft and the driving wheel spaced from the box body, at least a pair of driving wheels provided in the box body, and a pair of corresponding first driving wheels and a first chain connected to the outer periphery of the driving wheel, respectively. Let this drive wheel.

In some embodiments, the conveying device includes a plurality of pairs of pushing mechanisms and a plurality of pairs of driving wheels, each pushing mechanism includes two pairs of eccentric shafts, and each driving wheel has two gear teeth spaced apart from each other. Including a plurality of pairs of inner chains and a plurality of outer chains, each inner chain is connected to the gear teeth of two adjacent transmission wheels, and each outer chain is connected to two adjacent transmission wheels. Each tooth is located farther from the gear body of the box body, and each first chain is connected to the drive wheel and the gear tooth portion of the transmission wheel closer to the entrance of the case body, which is farther from the case body.

In some embodiments, the conveying device further includes a plurality of pairs of idler wheels arranged in the box body and between the pair of transmission wheels, and the pair of idler wheels are respectively locked on the inner and outer chains. .

In some embodiments, each eccentric shaft has a cylindrical main shaft portion and a long rod-shaped shaft portion. The transmission wheel is fixedly sleeved on the outer edge of the main shaft portion, and the off-axis portion is connected. The main rotating shaft portion passes through the box body and is connected to a pivoting plate. The off-axis portion is spaced from the center of the circle of the main rotating shaft portion.

In some embodiments, two partition modules are further included. The partition modules are connected to the box and spaced from each other. Each partition module includes a movable partition, and one of the partition modules The partition of the group may movably cover the entrance, and the partition of the other partition module may movably cover the exit.

In some embodiments, each partition module further includes a pair of guide rods, at least one pair of guides, and a base plate. Each of the guide rods is fixed at one end to the box body, and the other end is fixed to the base plate. The guides are movably sleeved on the pair of guide rods and are fixedly connected to the partition plate. The base plate is provided for the partition plate and can be driven to move the partition plate up and down along the pair of guide rods.

The new model has at least the following effects: the process of pivoting from the initial position to the shifting position by the shifting mechanism will drive the retention member to self-correspond by the placement ends of the recesses engaging the retention member The pair of placement slots move toward the output end to the next pair of placement slots, so that each workpiece can be baked through different space parts in the oven. In this way, the heating effect of each workpiece will be uniform, so that each workpiece The degree of heating to be baked tends to be uniform.

Referring to FIG. 1 to FIG. 3, an embodiment of the novel oven with a swinging conveying device is suitable for drying a plurality of workpieces 2 respectively held by a plurality of holding members 1, and each holding member 1 has two oppositely located Side of the placing end 11. In this embodiment, the holder 1 is a suspension rod, the workpiece 2 is a circuit board, and the holder 1 has two clamps 12 for holding the workpiece 2, but it is not limited thereto. The oven includes a cabinet 3, two partition modules 4, a support unit 5, and a conveying device 6, and can be used with an input mechanism 7.

The box 3 is a rectangular parallelepiped, and has a bottom wall 31, two side walls 33 connecting the bottom walls 31 spaced from each other, a top wall 32 connecting the side walls 33 and the bottom wall 31, an inlet 34, and an opposite to the inlet An outlet 35 of 34 and an internal space 36 defined by the bottom wall 31, two side walls 33, and the top wall 32 communicate with the inlet 34 and the outlet 35. The inlet 34 and the outlet 35 define a conveying direction D.

4 to FIG. 6, each partition module 4 includes a pair of guide rods 41, a base plate 42, a partition plate 43, two pairs of guides 44, a pair of air cylinders 45, and a pair of stoppers 46. One end of each guide rod 41 is fixed to the box body 3 by a stopper 46, and the other end is fixed to the base plate 42. The base plate 42 has a long plate shape. The partition plate 43 is disposed on the base plate 42 and extends toward the stopper 46 and can extend into the inner space 36 of the box 3. Two pairs of guides 44 are respectively movably sleeved on the side of the pair of guide rods 41 and fixedly connected to the side of the partition plate 43. Each cylinder 45 has a piston rod 451 connected to the base plate 42 so that the cylinder 45 can drive the base plate 42 to be connected The partition plate 43 is vertically displaced along the pair of guide rods 41. The stopper 46 is T-shaped, covers the top end of the fixed guide rod 41, and is fixed to the case 3 in a locking manner. The partition 43 of the partition module 4 located at the entrance 34 can movably cover the entrance 34, and the partition 43 of the partition module 4 located at the exit 35 can movably cover the exit 35. The partition modules 4 can be moved between an open position and a closed position by the cylinder 45 driving the substrate 42 and the partition 43 up and down along the pair of guide rods 41. In the open position, the partitions 43 of the partition modules 4 are below the internal space 36 of the box 3, so that the inlet 34 and the outlet 35 of the box 3 are not shielded, as shown in FIG. 1. In the closed position, the partition 43 of the partition module 4 located at the inlet 34 shields the inlet 34. As shown in FIG. 10, the partition 43 of the partition module 4 located at the outlet 35 shields the outlet 35.

The support unit 5 is used to support the conveying device 6 and includes a pair of support bars 51, two pairs of support plates 52, and six pairs of bearing seats 53. The pair of support bars 51 are fixedly provided on the side wall 33 of the box 3 and extend along the conveying direction D. Two pairs of support plates 52 are respectively disposed on the pair of support bars 51. Each support plate 52 is provided with two bearing seats 53.

The conveying device 6 is disposed in the box 3 for the holding members 1 to be placed, and is suitable for conveying the holding members 1 from the inlet 34 to the inner space 36 of the box 3 and leaving the box 3 from the exit 35. . The conveying device 6 includes a pair of placement pieces 61 respectively disposed in the box 3 in the inner space 36 and extending along the conveying direction D, and three pairs of the placement pieces 61 located in the inner space 36 and spaced apart from the placement pieces 61 respectively. A moving mechanism 62 is provided on the housing 3 and extends along the conveying direction D, a motor 63 provided on the housing 3, a drive shaft 64 penetrating the bottom wall 31 and connected to the motor 63 at one end, and a pair of A driving wheel 65 sleeved on the driving shaft 64 and spaced from the case 3, six pairs of transmission wheels 66 provided on the case 3, a pair of corresponding driving wheels 65 and the outer periphery of the transmission wheel 66, respectively The edged first chain 67, three pairs of inner chains 68, two outer chains 69, and a plurality of pairs of idlers 60 disposed in the box 3 and located between the pairs of transmission wheels 66. The number of the inner chain 68, the outer chain 69, and the idler 60 is not limited to the number of this embodiment, and may be other numbers in other embodiments, depending on the length of the box 3, as long as it is Just fine. And the number of the shifting mechanisms 62 is not limited to three, as long as at least one.

Each of the placing members 61 forms a plurality of spaced-apart placement grooves 611, and the placement grooves 611 are respectively suitable for placing the placement ends 11 of the holding members 1. Each pushing mechanism 62 has two eccentric shafts 621 penetrating the box 3, a pivot plate 622 spaced from the placement member 61, two bearings 624 sleeved on the eccentric shafts 621, and two sleeves The pressing member 625 of the eccentric shaft 621. Each eccentric shaft 621 is fixedly connected to the pivot plate 622 and can be driven to pivot. The eccentric shaft 621 has a main shaft portion 621a which is cylindrical and passes through the support plate 52 and the bearing seat 53 and a long shaft-shaped off-axis. A portion 621b and an off-axis portion 621b pass through the box 3 and the main rotating shaft portion 621a and are connected to the pivot plate 622. The off-axis portion 621b is spaced from the center of the main rotating shaft portion 621a. A plurality of grooves 623 are formed on the top surface of the pivot plate 622. The pressing member 625 is used to prevent the main shaft portion 621 a from being axially displaced relative to the support plate 52 and the bearing seat 53. Each transmission wheel 66 is fixedly sleeved on the outer edge of the corresponding main rotating shaft portion 621a, and has two gear tooth portions 661 spaced from each other. Each first chain 67 is respectively connected to the driving wheel 65 and the gear tooth portion 661 of the transmission wheel 66 which is closest to the inlet 34 of the box 3 and is far from the box 3. Each inner chain 68 is engaged with two adjacent gear wheels 66 of the gear wheels 661 which are closer to the box 3, that is, the number of the first and second gear wheels 66 from the direction of the inlet 34 is matched with one inner gear 68. The chain 68, the third and fourth transmission wheels 66 cooperate with one inner chain 68, and the fifth and sixth transmission wheels 66 cooperate with the last inner chain 68. Each outer chain 69 is engaged with two adjacent gear wheels 661 of the transmission wheels 66 which are far away from the box 3, that is, the second and third transmission wheels 66 are aligned with one outer by counting from the direction of the inlet 34. The chain 69, the fourth and fifth transmission wheels 66 cooperate with an outer chain 69. From the direction of the entrance 34, the first pair, the fourth pair and the sixth pair of idlers 60 abut against the inner chain 68 of the pair, and the second pair and the third pair of idler 60 abut one of the outer chain 69. Five pairs of idlers 60 abut against another outer chain 69. The idler 60 can increase the tension of the inner chain 68 and the outer chain 69 to improve transmission efficiency.

Each pair of pushing mechanism 62 can be pivoted between an initial position and a pushing position, in which the pivoting plate 622 of the pair of pushing mechanism 62 is close to the inlet 34, and at the pushing position, the shifts The pivoting plate 622 of the mechanism 62 is farther away from the inlet 34. The process of pivoting the pair of pushing mechanisms 62 from the initial position to the pushing position will drive each holding member 1 to the corresponding pair through the grooves 623 to engage the holding ends 11 of the holding members 1. The placement groove 611 moves toward the exit 35 to the next pair of placement grooves 611.

The input mechanism 7 is adapted to retrieve the holding members 1 and place the holding members 1 on the placing members 61, and includes a horizontal rail 71 extending along the conveying direction D, and a horizontal rail 71 provided away from the box. A horizontal motor 72 at one end of the body 3, a horizontal displacement seat 73 movably disposed on the horizontal rail 71, a vertical motor 74 provided at the upper end of the horizontal displacement seat 73, and a vertical displacement movably disposed on the horizontal displacement seat 73 Block 75. The horizontal rail 71 has a horizontal screw 711 connected to a horizontal motor 72 for the horizontal displacement seat 73 to be screwed. The horizontal motor 72 can drive the horizontal screw 711 to rotate, thereby driving the horizontal displacement seat 73 to move along the conveying direction D on the horizontal rail 71 . The horizontal displacement base 73 has a vertical screw 731 connected to a vertical motor 74 for the vertical displacement base 75 to be screwed. The vertical motor 74 can drive the vertical screw 731 to rotate, thereby driving the vertical displacement base 75 to move up and down on the horizontal displacement base 73. The vertical displacement base 75 has a moving frame 751 screwed to the vertical screw 731 and a shelf 752 connected to the moving frame 751 and extending toward the box 3. The shelf 752 is formed with a plurality of clamping slots (not shown) for the holding members. 1Place.

The following describes the operation flow of the new oven with a swinging conveying device and the input mechanism 7. First, referring to FIG. 7 to FIG. 10, the horizontal displacement seat 73 of the input mechanism 7 first moves toward the cabinet 3 along the horizontal track 71 to drive vertical displacement. The shelf 752 of the seat 75 enters the internal space 36 of the box 3 through the inlet 34. At this time, the shelf 752 on which a plurality of holders 1 holding a plurality of workpieces 2 are placed is located above the placement member 61 and the moving mechanism 62 As shown in Figure 8. Then, the vertical motor 74 drives the vertical displacement base 75 to move downward, so that the holding members 1 are moved to the placing member 61 and the pushing mechanism 62, as shown in FIG. 9. Next, the horizontal motor 72 drives the horizontal displacement seat 73 to exit the cabinet 3, and the partition module 4 at the entrance 34 is moved to the closed position after the vertical displacement seat 75 of the input mechanism 7 leaves the cabinet 3, as shown in FIG. 10 In this case, the oven starts to bake the workpiece 2 at this time. 11 to FIG. 14, when the holding members 1 are respectively located in the placement grooves 611 of the pair of placing members 61, the motor 63 starts to drive the driving shaft 64 to drive the pair of driving wheels 65 to rotate, thereby driving the first chain. 67 moves to drive the corresponding transmission wheel 66 to rotate, and the second transmission wheel 66 is counted from the direction of the inlet 34 by the movement of the inner chain 68, and because the transmission wheels 66 are fixedly connected to the corresponding eccentric shaft 621 The main rotating shaft portion 621a, the eccentric shaft portions 6221 of the eccentric shafts 621 will also be driven to rotate synchronously, and finally drive the corresponding pivoting plate 622 to pivot from the initial position to the pushing position, and engage through the grooves 623. The placement ends 11 of the holder 1 drive the holder 1 from the corresponding pair of placement slots 611 toward the output end to the next pair of placement slots 611. The above description is for the first pair of shifting mechanisms 62 from the direction of the inlet 34. The second pair and the third pair of shifting mechanisms 62 also operate in the same way. The corresponding transmission wheels 66 will be driven by the inner chains 68. And each external chain 69 rotates in synchronization with each other, and finally the corresponding pivoting plate 622 of the pair of pushing mechanism 62 will pivot from the initial position to the pushing position, as shown in FIGS. 12 and 13. The above-mentioned operation process will continue until the holder 1 reaches the pair of placement grooves 611 closest to the outlet 35, at which time the motor 63 stops operation, as shown in FIG. 14. In this way, the drying operation of the workpiece 2 is completed. In the above manner, the workpiece 2 can be moved toward the outlet 35 at a distance of one placement slot 611 while being baked, so that each workpiece 2 can pass through different space parts in the oven, even if the heating efficiency of each space part is different. However, due to the relationship of this conveying mode, the time that each workpiece 2 stays in each space part is the same, so that the heating effect of each workpiece 2 is uniform.

In summary, the process of the new oven with a swinging conveying device pivoting from the initial position to the shifting position by the shifting mechanism 62 will engage the retaining member 1 with the groove 623. Waiting for the placement end portion 11 to drive the holder 1 from the corresponding pair of placement grooves 611 toward the output end to the next pair of placement grooves 611, so that each work piece 2 can be baked through different space portions in the oven. The heating effect of each workpiece 2 will be uniform, so that the degree of heating of each workpiece 2 to be baked tends to be uniform, so it can indeed achieve the purpose of new cost.

However, the above are only examples of the new model. When the scope of implementation of the new model cannot be limited by this, any simple equivalent changes and modifications made in accordance with the scope of the patent application of the new model and the content of the patent specification are still Within the scope of this new patent.

1‧‧‧ holding parts
11‧‧‧ Place the end
12‧‧‧ Fixture
2‧‧‧ Workpiece
3‧‧‧ box
31‧‧‧ bottom wall
32‧‧‧ top wall
33‧‧‧ sidewall
34‧‧‧ Entrance
35‧‧‧Export
36‧‧‧Interior space
4‧‧‧ bulkhead module
41‧‧‧Guide
42‧‧‧ substrate
43‧‧‧ bulkhead
44‧‧‧Guide
45‧‧‧ cylinder
451‧‧‧Piston rod
46‧‧‧stop
5‧‧‧ support unit
51‧‧‧ support bar
52‧‧‧ support plate
53‧‧‧bearing
6‧‧‧ Conveying device
61‧‧‧Placement
611‧‧‧Slot
62‧‧‧Transfer agency
621‧‧‧eccentric shaft
621a‧‧‧Main shaft section
621b‧‧‧Off-axis section
622‧‧‧Pivot plate
623‧‧‧Groove
624‧‧‧bearing
625‧‧‧ Urgent
63‧‧‧Motor
64‧‧‧Drive shaft
65‧‧‧Drive Wheel
66‧‧‧Drive Wheel
661‧‧‧ Gear Teeth
67‧‧‧First Chain
68‧‧‧Inner chain
69‧‧‧ Outer chain
60‧‧‧Idler
7‧‧‧ import agency
71‧‧‧ horizontal orbit
711‧‧‧Horizontal Screw
72‧‧‧ Horizontal Motor
73‧‧‧Horizontal displacement seat
731‧‧‧Vertical Screw
74‧‧‧Vertical Motor
75‧‧‧Vertical displacement seat
751‧‧‧mobile rack
752‧‧‧shelf
D‧‧‧ Conveying direction

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, among which:
1 is a perspective view of an embodiment of the novel oven with a swinging conveying device and an input mechanism;
2 is a partial perspective view of the embodiment and the input mechanism, in which a box is omitted;
3 is a side view of one of the embodiment and the input mechanism;
4 is another side view of the embodiment and the input mechanism;
5 is an incomplete perspective view of the embodiment;
FIG. 6 is a partial exploded view of the embodiment; FIG.
7 is a perspective view of the embodiment and the input mechanism, illustrating that a horizontal displacement seat of the input mechanism is moved toward the box, so that a rack of a vertical displacement seat of the input mechanism extends into the box;
8 is a front view of one of the embodiment and the input mechanism;
FIG. 9 is a front view of one of the embodiment and the input mechanism, illustrating that the rack of the vertical displacement base of the input mechanism is moved downward to place a plurality of holding members on a pair of placing members of a conveying device and a plurality of On the agency
10 is a perspective view of a first embodiment of the embodiment, illustrating a partition module located at the entrance is moved to a closed position;
FIG. 11 is an upper cross-sectional view obtained from the section line XX of FIG. 10, illustrating that the retaining members are respectively located in the placement grooves of the pair of placing members and the grooves of the plurality of pivoting plates of the pair of pushing mechanisms. Wait for the shift mechanism to be in an initial position;
FIG. 12 is a top cross-sectional view similar to FIG. 11, illustrating a distance by which the pair of pushing mechanisms are moved to a pushing position, so that the holding members are moved one placement groove toward the exit;
FIG. 13 is a side view of one of the embodiments, illustrating the pair of shift mechanisms in the shift position; and FIG. 14 is a schematic partial side view of the embodiment, illustrating the pair of shift mechanisms will be closest to the exit The holding member is driven into the placing slots of the pair of placing members closest to the exit.

Claims (8)

An oven suitable for drying a plurality of workpieces respectively held by a plurality of holding members, each holding member having two placement ends on opposite sides, the oven comprising:
A box having an entrance, an exit opposite to the entrance, and an internal space connecting the entrance and the exit, the entrance and the exit defining a conveying direction; and a conveying device provided in the box for the The holding device is suitable for conveying the holding devices from the inlet to the internal space of the box and leaving the box from the outlet. The conveying device includes a pair of the device respectively disposed in the box and located in the internal space. Placement pieces extending along the conveying direction and at least one pair of moving mechanisms located in the internal space and pivotably provided on the box body extending along the conveying direction, spaced apart from the place pieces, each placing piece is formed A plurality of spaced-apart placement grooves, which are respectively suitable for placing the placement ends of the holding members, each of the pushing mechanisms forms a plurality of grooves, and the pair of pushing mechanisms can be in an initial position and a pushing position. At the initial position, the pair of shifting mechanisms is closer to the entrance, and at the shifting position, the shifting mechanisms are farther away from the entrance, and the pair of shifting mechanisms are pivoted from the initial position to The transition process position by the engagement of these recesses is placed such fixed end portion of each holding member driven by the placement of the holder from the corresponding groove to move toward the outlet of the placement of the next slot. The oven according to claim 1, wherein each pushing mechanism has at least one eccentric shaft provided in the box body and a pivot plate spaced from the placing member, and the eccentric shaft is fixed to the pivot plate and can be Driven to pivot, the grooves are formed on the top surface of the pivot plate. The oven according to claim 2, wherein the box body further has a bottom wall, and the conveying device further includes a motor disposed on the box body, a drive shaft passing through the bottom wall and connected to the motor at one end, a pair of A driving wheel respectively sleeved on the driving shaft and spaced from the box body, at least a pair of transmission wheels provided in the box body, and a pair of first chains which respectively connect the corresponding driving wheels and the outer periphery of the driving wheel, The eccentric shaft passes through the transmission wheel. The oven according to claim 3, wherein the conveying device includes a plurality of pairs of pushing mechanisms and a plurality of pairs of driving wheels, each pushing mechanism includes two pairs of eccentric shafts, and each driving wheel has two gear teeth spaced from each other, The conveying device further includes a plurality of pairs of inner chains and a plurality of outer chains. Each inner chain is engaged with two adjacent gear wheels of the transmission gear, and each outer chain is engaged with two adjacent ones. After the gear teeth of the transmission wheel are farther away from the box body, each first chain is respectively connected to the drive wheel and the gear teeth of the transmission wheel closest to the entrance of the box body, which are far away from the box body. The oven according to claim 4, wherein the conveying device further includes a plurality of pairs of idler wheels arranged in the box body and between the pair of transmission wheels, and the pair of idler wheels are respectively locked on the pair of inner chains and These external chains. The oven according to claim 4, wherein each eccentric shaft has a main shaft portion having a cylindrical shape and an off shaft portion having a long rod shape, and the transmission wheel is fixedly sleeved on the outer edge of the main shaft portion. An off-axis portion is connected to the main rotation shaft portion, passes through the box body, and is connected to a pivot plate. The off-axis portion is spaced from the center of the circle of the main rotation shaft portion. The oven according to claim 1, further comprising two partition modules connected to the box and spaced from each other. Each partition module includes a movable partition, one of which The partition of the panel module can movably cover the entrance, and the partition of the other partition module can movably cover the exit. The oven according to claim 7, wherein each partition module further includes a pair of guide rods, at least a pair of guides, and a base plate, one end of each guide rod is fixed to the box body, and the other end is fixed to the box body. A base plate, the pair of guide members are movably sleeved on the pair of guide rods and are fixedly connected to the partition plate, the base plate is provided for the partition plate and can be driven to move the partition plate up and down along the pair of guide rods.