Aluminum foil rolling device with built-in machine vision monitoring unit

Abstract

The utility model discloses an aluminum foil rolling device with a built-in machine vision monitoring unit, which relates to the field of aluminum foil rolling machines and comprises a bottom plate, a fixed roller and a movable roller, and support frames are symmetrically and fixedly mounted at the upper end of the bottom plate. By the adoption of the structure, the output end of the first driving motor drives the second rotating rod to rotate on the inner side of the second mounting groove in the front face of the supporting frame, the third bevel gear on the outer side of the second rotating rod is in meshing transmission with the fourth bevel gear, and the first rotating rod connected with the fourth bevel gear rotates on the inner side of the second mounting groove; meanwhile, a second bevel gear on the outer side of a first rotating rod drives a first bevel gear, so that a screw rod connected with the first bevel gear can synchronously rotate at the supporting frame, and meanwhile, a lower roller frame in threaded connection with the outer side of the screw rod can move between the supporting frame and an upper roller frame; therefore, the positions from the movable roller in the lower roller frame to the fixed roller in the upper roller frame can be conveniently adjusted for use.

Description

Technical Field

[0001] The utility model belongs to the field of aluminum foil rolling machines, and particularly relates to an aluminum foil rolling device with a built-in machine vision monitoring unit. Background Art

[0002] The working principle of the aluminum foil roller press is to squeeze and compact the aluminum foil through two rollers rotating in opposite directions. In order to improve production efficiency and product quality, modern aluminum foil roller presses often have built-in machine vision monitoring units. The monitoring unit can capture the image of the aluminum foil during the rolling process in real time, and analyze and judge it through image processing technology, so as to detect defects of the aluminum foil in time.

[0003] The Chinese patent roller press roller gap adjustment device with publication number CN219502844U is installed on the roller press frame and located between the fixed roller and the movable roller of the roller press, including a plurality of pads installed between the end bearing seats of the fixed roller and the movable roller, the pads are fixedly installed on the frame, and each of the pads is installed with a plurality of stacked L-shaped pads, one plate surface of the L-shaped pad is fixedly connected to the top of the pad, and the other plate surface of the L-shaped pad is located on the side of the pad facing the movable roller and extends downward.

[0004] During the actual use of the roller press in the above-mentioned prior art, we found that there are still some shortcomings. For example, the gap between the fixed roller and the movable roller can be adjusted by adding or removing L-shaped pads, but it is necessary to use screws and locking nuts to fix them before and after the adjustment, which is very inconvenient. In addition, the current traditional installation method of fixed rollers and movable rollers mainly uses a large number of screws for installation and fixation. The later disassembly and assembly requires special tools to disassemble them, and the disassembly and assembly efficiency is low. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the utility model is to provide an aluminum foil rolling device with a built-in machine vision monitoring unit to solve the problems mentioned in the background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] The cam is secured to the upper and lower surfaces of the support frame, and the cam is secured to the lower surfaces of the support frame by a plurality of means for camming the support frame.

[0008] The adjusting mechanism comprises a screw and a first mounting groove, the screw being symmetrically rotatably connected between the upper roller frame and the inner frame wall of the support frame, the lower roller frame being threadedly connected to the outer side of the screw, the first mounting groove being opened on the outer side of the support frame, the lower end of the screw extending into the first mounting groove and a first bevel gear being fixedly installed on the inner side thereof, the first rotating rod being rotatably connected on the inner side of the first mounting groove, a second bevel gear being fixedly installed on the outer side of the first rotating rod, the first bevel gear and the second bevel gear being meshingly connected, and a driving mechanism being provided at one end of the first rotating rod through the adjusting mechanism, the position between the movable roller on the lower roller frame and the fixed roller can be conveniently adjusted;

[0009] The driving mechanism comprises a second mounting groove, the second mounting groove is arranged on the front side of the supporting frame, the inner side of the second mounting groove is rotatably connected with the same second rotating rod, the outer side of the second rotating rod is fixedly installed with a third bevel gear, one end of the first rotating rod extends into the inner side of the second mounting groove and a fourth bevel gear is fixedly installed, the third bevel gear and the fourth bevel gear are meshingly connected, the outer side of the supporting frame of the right half of the bottom plate is fixedly installed with a first driving motor, the right end of the second rotating rod is fixedly installed with the output end of the first driving motor, and the driving mechanism can be conveniently driven to operate the adjusting mechanism;

[0010] The mounting mechanism comprises a convex groove, which is arranged at the upper ends of the lower roller frame and the upper roller frame, a card seat is inserted in the inner side of the convex groove, an assembly groove is arranged at the upper end of the card seat, a guide rod is fixedly installed on the opposite side of the inner part of the assembly groove, a convex block is symmetrically slidably connected to the outer side of the guide rod, a spring is sleeved on the outer side of the guide rod, the spring is arranged between the convex blocks, a blocking cover is fixedly installed on the inner side of the upper end of the assembly groove, the convex part of the block movably passes through the blocking cover, a card block is fixedly installed on the side of the block away from the spring, and the inner wall of the convex groove is symmetrically provided with card slots, and the card-in end of the card block movably passes through the assembly groove and is engaged with the card slot, and through the mounting mechanism, the fixed roller or the movable roller can be quickly disassembled and removed from the corresponding upper roller frame or the upper roller frame.

[0011] As a preferred technical solution, a slide groove is symmetrically opened on the inner side of the support frame, and the lower roller frame and the slide groove of the support frame are slidably connected. Through the slide groove, the lower roller frame can slide conveniently on the support frame.

[0012] As an optimal technical solution, a screw sleeve is symmetrically fixedly installed on the inner side of the upper end of the lower roller frame, and the lower roller frame is threadedly connected to the outer side of the screw through the screw sleeve. The screw sleeve can facilitate the threaded connection of the lower roller frame to the outer side of the screw.

[0013] As a preferred technical solution, slots are symmetrically provided on the inner side of the convex groove, and the socket and the convex groove slots are plugged in. Through the slots, the convex groove and the socket can be conveniently positioned and plugged in.

[0014] As a preferred technical solution, a positioning groove is provided at the notch of the assembly groove, and the blocking cover is fixedly installed on the inner side of the positioning groove by screws. A limiting hole is provided on the inner side of the blocking cover, and the convex part of the protrusion can movably pass through the limiting hole. The positioning groove can facilitate the positioning and installation of the blocking cover, and the limiting hole can facilitate the convex part of the protrusion to be movably limited.

[0015] As a preferred technical solution, the outer side of the base plate is symmetrically fixedly connected with a fixing seat, and there are four fixing seats in total. The base plate can be conveniently fixed by the fixing seats.

[0016] In summary, the utility model mainly has the following beneficial effects:

[0017] First, the output end of the first driving motor is used to drive the second rotating rod to rotate inside the second mounting groove on the front side of the support frame, the third bevel gear on the outside of the second rotating rod is meshed with the fourth bevel gear to transmit the first rotating rod connected to the fourth bevel gear to rotate inside the second mounting groove, and at the same time, the second bevel gear on the outside of the first rotating rod transmits the first bevel gear, so that the screw connected to the first bevel gear can rotate synchronously at the support frame, and at the same time, the lower roller frame connected by the thread on the outside of the screw can move between the support frame and the upper roller frame, so that the position of the movable roller in the lower roller frame to the fixed roller in the upper roller frame can be adjusted for use;

[0018] Second, when installing the fixed roller or the movable roller, place the corresponding roller shaft on the shaft groove of the upper roller frame or the lower roller frame, and then insert the clamping seat into the convex groove of the upper roller frame or the lower roller frame. During the positioning and insertion process, the card-in ends of the card blocks on both sides of the clamping seat are squeezed by the convex groove, and at the same time, the protrusions connected to the card blocks slide close to each other on the guide rod on the inner side of the assembly groove of the clamping seat and squeeze the spring. When the clamping seat is inserted into place and the card-in end of the card block corresponds to the position of the card slot, the spring reset pushes the protrusions away from each other, and the card block of the protrusion can be fixed with the card slot. When disassembling, it is only necessary to use the two protrusions on the upper end of the clamping seat to move close to each other, so that the protrusion drives the card block to separate from the slot of the convex groove, and then pull the clamping seat up and take it out of the convex groove, so that the fixed roller and movable roller on the upper roller frame and the lower roller frame can be easily disassembled and maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 The utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 It is an exploded view of the installation mechanism of the utility model;

[0022] Figure 4 It is a schematic diagram of the side frame structure of the utility model.

[0023] Figure numerals: 1, bottom plate; 2, support frame; 3, upper roller frame; 4, fixed roller; 5, lower roller frame; 6, movable roller; 7, adjustment mechanism; 701, screw; 702, first bevel gear; 703, first rotating rod; 704, second bevel gear; 705, first mounting groove; 8, screw sleeve; 9, slide groove; 10, fixed seat; 11, driving mechanism; 111, first driving motor; 112, second rotating rod; 113, second mounting groove Mounting groove; 114, third bevel gear; 115, fourth bevel gear; 12, side frame; 13, second drive motor; 14, mounting mechanism; 141, holder; 142, assembly groove; 143, guide rod; 144, spring; 145, protrusion; 146, protruding groove; 147, block; 148, blocking cover; 15, limiting hole; 16, positioning groove; 17, card slot; 18, slot; 19, visual monitoring camera; 20, support sleeve. DETAILED DESCRIPTION

[0024] refer to Figures 1 to 4The aluminum foil rolling device with a built-in machine vision monitoring unit described in this embodiment includes a bottom plate 1, a fixed roller 4 and a movable roller 6. A support frame 2 is symmetrically fixedly installed on the upper end of the bottom plate 1. An upper roller frame 3 is fixedly installed on the inner upper half of the support frame 2. A lower roller frame 5 is slidably connected to the inner lower half of the support frame 2. A mounting mechanism 14 is provided on the upper ends of the upper roller frame 3 and the lower roller frame 5. The fixed roller 4 is arranged on the inner side of the upper roller frame 3, and the movable roller 6 is arranged on the inner side of the lower roller frame 5. A side frame 12 is fixedly installed on the outer sides of the upper roller frame 3 and the lower roller frame 5 on the left half of the bottom plate 1. The side frame 12 A second drive motor 13 is fixedly installed on the outside of the support frame 2, the output end of the second drive motor 13 in the upper half of the support frame 2 and one end of the shaft of the fixed roller 4 are fixedly installed through a coupling, the output end of the second drive motor 13 in the lower half of the support frame 2 and one end of the shaft of the movable roller 6 are fixedly installed through a coupling, the same support sleeve 20 is fixedly installed on the outside of the support frame 2, the visual monitoring camera 19 is fixedly installed on the inside of the support sleeve 20, and an adjustment mechanism 7 is provided on the inside of the support frame 2; the visual monitoring camera 19 is an industrial camera model WP-UFV120, which is a prior art product;

[0025] The adjusting mechanism 7 includes a screw 701 and a first mounting groove 705. The screw 701 is symmetrically connected to the upper roller frame 3 and the inner frame wall of the support frame 2. The lower roller frame 5 is threadedly connected to the outer side of the screw 701. The first mounting groove 705 is provided on the outer side of the support frame 2. The lower end of the screw 701 extends into the first mounting groove 705, and the first bevel gear 702 is fixedly installed on the inner side. The first rotating rod 703 is rotatably connected to the inner side of the first mounting groove 705, and the second bevel gear 702 is fixedly installed on the outer side of the first rotating rod 703. The first bevel gear 702 and the second bevel gear 704 are meshedly connected. One end of the first rotating rod 703 is provided with a driving mechanism 11. The driving mechanism 11 includes a second mounting groove 113. The second mounting groove 113 is provided on the front of the support frame 2. The inner side of the second mounting groove 113 is rotatably connected with the same second rotating rod 112. The outer side of the second rotating rod 112 is fixedly installed with a third bevel gear 114. One end of the first rotating rod 703 extends into the inner side of the second mounting groove 113 and a fourth bevel gear is fixedly installed. 115, the third bevel gear 114 and the fourth bevel gear 115 are meshingly connected, the first driving motor 111 is fixedly installed on the outer side of the supporting frame 2 of the right half of the bottom plate 1, the right end of the second rotating rod 112 is fixedly installed on the output end of the first driving motor 111, and the second rotating rod 112 is driven to rotate inside the second mounting groove 113 on the front side of the supporting frame 2 by the output end of the first driving motor 111, the third bevel gear 114 on the outer side of the second rotating rod 112 meshes with the fourth bevel gear 115, and the first rotating rod 703 connected to the fourth bevel gear 115 rotates inside the second mounting groove 113, and at the same time, the second bevel gear 704 on the outer side of the first rotating rod 703 drives the first bevel gear 702, so that the screw rod 701 connected to the first bevel gear 702 can rotate synchronously at the supporting frame 2, and at the same time, the lower roller frame 5 threadedly connected to the outer side of the screw 701 can move between the supporting frame 2 and the upper roller frame 3, so that the movable roller 6 in the lower roller frame 5 can be conveniently adjusted to the fixed roller 4 in the upper roller frame 3;

[0026] The mounting mechanism 14 includes a convex groove 146, which is provided at the upper ends of the lower roller frame 5 and the upper roller frame 3. A holder 141 is inserted into the inner side of the convex groove 146, and an assembly groove 142 is provided at the upper end of the holder 141. A guide rod 143 is fixedly installed on the opposite side of the inner side of the assembly groove 142, and a convex block 145 is symmetrically slidably connected to the outer side of the guide rod 143. A spring 144 is sleeved on the outer side of the guide rod 143, and the spring 144 is provided between the convex blocks 145. A blocking cover 148 is fixedly installed on the inner side of the upper end of the assembly groove 142, and the convex part of the convex block 145 is movable. The stopper 148 is penetrated, and a block 147 is fixedly installed on the side of the protrusion 145 away from the spring 144. The inner wall of the protrusion 146 is symmetrically provided with a slot 17. The snap-in end of the block 147 is movably penetrated through the assembly slot 142 and snap-in with the slot 17. When installing the fixed roller 4 or the movable roller 6, the corresponding roller shaft is placed on the shaft groove of the upper roller frame 3 or the lower roller frame 5, and then the card seat 141 is inserted into the protrusion 146 of the upper roller frame 3 or the lower roller frame 5. During the positioning and insertion process, the snap-in ends of the blocks 147 on both sides of the card seat 141 are subjected to the pressure from the protrusion 146. 146 is squeezed, and at the same time, the protrusion 145 connected to the block 147 slides close to each other on the guide rod 143 inside the assembly groove 142 of the card seat 141 and squeezes the spring 144. When the card seat 141 is inserted into place, and the card-in end of the block 147 corresponds to the position of the card slot 17, the spring 144 resets and pushes the protrusions 145 away from each other, and the block 147 of the protrusion 145 can be clamped and fixed with the card slot 17. When disassembling, it is only necessary to use the two protrusions 145 at the upper end of the card seat 141 to move close to each other so that the protrusions 145 Drive the block 147 to separate from the slot 18 of the convex groove 146, and then pull up the holder 141 to remove it from the convex groove 146, so that the fixed roller 4 and the movable roller 6 on the upper roller frame 3 and the lower roller frame 5 can be easily disassembled and maintained; the roller shaft ends of the fixed roller 4 and the movable roller 6 are also provided with limit rings, which are convenient for positioning the roller shaft ends of the fixed roller 4 and the movable roller 6 in the shaft grooves of the upper roller frame 3 or the lower roller frame 5, and when disassembling, the coupling can be combined to first disassemble the shaft of the fixed roller 4 or the movable roller 6 and the shaft of the second drive motor 13.

[0027] refer to Figure 1 A slide groove 9 is symmetrically provided on the inner side of the support frame 2, and the lower roller frame 5 is slidably connected to the slide groove 9 of the support frame 2. By sliding the lower roller frame 5 in the slide groove 9 of the support frame 2, the stability of the lower roller frame 5 can be improved.

[0028] refer to Figure 1 A screw sleeve 8 is symmetrically fixedly installed on the inner side of the upper end of the lower roller frame 5. The lower roller frame 5 is threadedly connected to the outer side of the screw rod 701 through the screw sleeve 8. The lower roller frame 5 with the screw sleeve 8 can be conveniently threadedly connected to the screw rod 701.

[0029] refer to Figure 3A slot 18 is symmetrically provided on the inner side of the convex groove 146 , and the card holder 141 is plugged into the slot 18 of the convex groove 146 . By plugging the card holder 141 into the slot 18 on the convex groove 146 , the card holder 141 can be conveniently positioned and installed.

[0030] refer to Figure 3 A positioning groove 16 is provided at the notch of the assembly groove 142, and a blocking cover 148 is fixedly installed on the inner side of the positioning groove 16 by screws. A limiting hole 15 is provided on the inner side of the blocking cover 148, and the convex part of the protrusion 145 movably passes through the limiting hole 15. The blocking cover 148 is installed in the positioning groove 16 by screws, which can facilitate the installation of the blocking cover 148. The limiting hole 15 on the blocking cover 148 can facilitate the movability of the convex part of the protrusion 145.

[0031] refer to Figure 1 The outer side of the bottom plate 1 is symmetrically fixedly connected with a fixing seat 10, and there are four fixing seats 10 in total. The fixing seats 10 on the bottom plate 1 can be used to facilitate the installation of the bottom plate 1.

[0032] Principle and advantages of use: During use, when installing the fixed roller 4 or the movable roller 6, the corresponding roller shaft is placed on the shaft groove of the upper roller frame 3 or the lower roller frame 5, and then the clamping seat 141 is inserted into the convex groove 146 of the upper roller frame 3 or the lower roller frame 5. During the positioning and insertion process, the clamping ends of the clamping blocks 147 on both sides of the clamping seat 141 are squeezed by the convex groove 146, and at the same time, the convex blocks 145 connected to the clamping blocks 147 slide close to each other on the guide rod 143 inside the assembly groove 142 of the clamping seat 141 and align the spring 144 is squeezed, when the card holder 141 is inserted into place, and the inserted end of the card block 147 corresponds to the position of the card slot 17, the spring 144 is reset to push the protrusions 145 away from each other, and the card block 147 of the protrusion 145 can be fixed with the card slot 17. When disassembling, it is only necessary to use the two protrusions 145 on the upper end of the card holder 141 to move closer to each other, so that the protrusion 145 drives the card block 147 to separate from the slot 18 of the protruding groove 146, and then pull the card holder 141 up and take it out of the protruding groove 146;

[0033] During use, the output end of the first drive motor 111 is used to drive the second rotating rod 112 to rotate inside the second mounting groove 113 on the front side of the support frame 2, and the third bevel gear 114 on the outside of the second rotating rod 112 engages and transmits the fourth bevel gear 115, and the first rotating rod 703 connected to the fourth bevel gear 115 rotates inside the second mounting groove 113, and at the same time, the second bevel gear 704 on the outside of the first rotating rod 703 transmits the first bevel gear 702, so that the screw rod 701 connected to the first bevel gear 702 can rotate synchronously at the support frame 2, and at the same time, the lower roller frame 5 threadedly connected to the outside of the screw 701 can move between the support frame 2 and the upper roller frame 3, so that the position of the movable roller 6 in the lower roller frame 5 to the fixed roller 4 in the upper roller frame 3 can be adjusted for use.

Claims

1. An aluminum foil rolling device with a built-in machine vision monitoring unit, comprising a bottom plate (1), a fixed roller (4) and a movable roller (6), characterized in that: A support frame (2) is symmetrically fixedly mounted on the upper end of the bottom plate (1), an upper roller frame (3) is fixedly mounted on the inner upper half of the support frame (2), a lower roller frame (5) is slidably connected to the inner lower half of the support frame (2), a mounting mechanism (14) is provided at the upper ends of the upper roller frame (3) and the lower roller frame (5), the fixed roller (4) is arranged on the inner side of the upper roller frame (3), the movable roller (6) is arranged on the inner side of the lower roller frame (5), and a side frame (12) is fixedly mounted on the outer sides of the upper roller frame (3) and the lower roller frame (5) on the left half of the bottom plate (1), the side frame ( A second drive motor (13) is fixedly installed on the outer side of the support frame (12); the output end of the second drive motor (13) in the upper part of the support frame (2) and one end of the shaft of the fixed roller (4) are fixedly installed through a coupling; the output end of the second drive motor (13) in the lower part of the support frame (2) and one end of the shaft of the movable roller (6) are fixedly installed through a coupling; the same support sleeve (20) is fixedly installed on the outer side of the support frame (2); a visual monitoring camera (19) is fixedly installed on the inner side of the support sleeve (20); and an adjustment mechanism (7) is provided on the inner side of the support frame (2); The adjusting mechanism (7) comprises a screw (701) and a first mounting groove (705); the screw (701) is symmetrically rotatably connected between the upper roller frame (3) and the inner frame wall of the support frame (2); the lower roller frame (5) is threadedly connected to the outer side of the screw (701); the first mounting groove (705) is arranged on the outer side of the support frame (2); the lower end of the screw (701) extends into the inner side of the first mounting groove (705) and a first bevel gear (702) is fixedly installed thereon; the inner side of the first mounting groove (705) is rotatably connected to a first rotating rod (703); the outer side of the first rotating rod (703) is fixedly installed with a second bevel gear (704); the first bevel gear (702) and the second bevel gear (704) are meshingly connected; one end of the first rotating rod (703) is provided with a driving mechanism (11); The mounting mechanism (14) comprises a convex groove (146), wherein the convex groove (146) is provided at the upper ends of the lower roller frame (5) and the upper roller frame (3), wherein a holder (141) is inserted into the inner side of the convex groove (146), wherein an assembly groove (142) is provided at the upper end of the holder (141), wherein a guide rod (143) is fixedly installed on the opposite side of the inner side of the assembly groove (142), wherein a convex block (145) is symmetrically slidably connected to the outer side of the guide rod (143), and a spring (145) is sleeved on the outer side of the guide rod (143). 44), the spring (144) is arranged between the protrusions (145), a blocking cover (148) is fixedly installed on the inner side of the upper end of the assembly groove (142), the convex part of the protrusion (145) movably penetrates the blocking cover (148), a clamping block (147) is fixedly installed on the side of the protrusion (145) away from the spring (144), the inner wall of the convex groove (146) is symmetrically provided with clamping grooves (17), and the clamping end of the clamping block (147) movably penetrates the assembly groove (142) and the clamping groove (17) for clamping connection.

2. The aluminum foil rolling device with a built-in machine vision monitoring unit according to claim 1, characterized in that: The inner side of the support frame (2) is symmetrically provided with a slide groove (9), and the lower roller frame (5) is slidably connected to the slide groove (9) of the support frame (2).

3. The aluminum foil rolling device with a built-in machine vision monitoring unit according to claim 1, characterized in that: A screw sleeve (8) is symmetrically fixedly mounted on the inner side of the upper end of the lower roller frame (5), and the lower roller frame (5) is threadedly connected to the outer side of the screw rod (701) through the screw sleeve (8).

4. The aluminum foil rolling device with a built-in machine vision monitoring unit according to claim 1, characterized in that: The driving mechanism (11) comprises a second mounting groove (113), wherein the second mounting groove (113) is provided on the front side of the supporting frame (2), the inner side of the second mounting groove (113) is rotatably connected to the same second rotating rod (112), the outer side of the second rotating rod (112) is fixedly mounted with a third bevel gear (114), one end of the first rotating rod (703) extends into the inner side of the second mounting groove (113) and a fourth bevel gear (115) is fixedly mounted thereon, the third bevel gear (114) and the fourth bevel gear (115) are meshingly connected, the outer side of the supporting frame (2) on the right half of the bottom plate (1) is fixedly mounted with a first driving motor (111), and the right end of the second rotating rod (112) is fixedly mounted with the output end of the first driving motor (111).

5. The aluminum foil rolling device with a built-in machine vision monitoring unit according to claim 1, characterized in that: A slot (18) is symmetrically provided on the inner side of the convex groove (146), and the card seat (141) is plugged into the slot (18) of the convex groove (146).

6. The aluminum foil rolling device with a built-in machine vision monitoring unit according to claim 1, characterized in that: A positioning groove (16) is provided at the notch of the assembly groove (142); the blocking cover (148) is fixedly mounted on the inner side of the positioning groove (16) by means of screws; a limiting hole (15) is provided on the inner side of the blocking cover (148); and the convex portion of the protrusion (145) movably passes through the limiting hole (15).

7. The aluminum foil rolling device with a built-in machine vision monitoring unit according to claim 1, characterized in that: The outer side of the bottom plate (1) is symmetrically fixedly connected with a fixing seat (10), and a total of four fixing seats (10) are provided.

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