Automatic feeding device for capsule checkweigher

Abstract

The application relates to an automatic feeding device of a capsule weight checking scale, which comprises a material bin, a top feeding plate and a driving device, wherein the top feeding plate is a flat plate perpendicular to the horizontal plane, the top feeding plate penetrates the bottom of the material bin and extends into the material bin to vertically move up and down, the two side faces of the top feeding plate are planes perpendicular to the horizontal plane and the plane of the flat plate, the projection of the top of the top feeding plate on the plane of the flat plate is a straight edge, the straight edge is called the top straight edge of the top of the top feeding plate, the top straight edge of the top of the top feeding plate is inclined to the horizontal plane and the length is greater than the length of one capsule, the top of the top feeding plate is formed into a long strip-shaped equal-section groove along the length direction of the top straight edge of the top of the top feeding plate, a long strip-shaped hole is formed on the discharge side wall, the bottom of the long strip-shaped hole is formed into a discharging groove connecting the inside and outside of the material bin along the thickness direction of the discharge side wall, the discharging groove is inclined to the lower part of the outside of the material bin, the inner side wall of the groove body of the discharging groove is a cylindrical surface, the groove and the discharging groove form a discharging channel of the material bin, the driving device is located outside the material bin, and the top feeding plate is connected with the driving device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automatic detection of capsule weight, in particular to an automatic single-particle feeding device of a capsule weight detection scale. BACKGROUND

[0002] Capsules are also called capsules, which are cylindrical in the middle and have spherical caps at both ends. The length of the capsule is the sum of the axial length of the cylinder and the radius of the spherical cap at both ends, which is generally more than 2 times the diameter of the cylinder.

[0003] The Pharmacopoeia and the Drug Administration Law stipulate that the weight of the capsule must be controlled within a certain range. The capsule weight detection scale is used to calculate the drug load by weighing the whole capsule and then subtracting the weight of the capsule shell after determining the weight of the capsule shell. There are several automatic feeding devices for capsule weight detection scales. One is to set multiple levels of vibration corrugated plates corresponding to the same number of front and rear channels under the hopper. The first corrugated plate scatters the capsules into different corrugated grooves, and the subsequent corrugated plates scatter the capsules in the corrugated grooves one by one to form a queue. This method cannot control the capsules to move out of the corrugated plate one by one at equal intervals, and it is easy to cause two capsules in the same corrugated groove to have a small time or spatial interval, so that the two capsules are on the scale at the same time, resulting in weighing failure, and thus reducing the detection efficiency. Another way is to set a vertical pipe in the hopper, drive the pipe or the hopper to move up and down to make them move relative to each other to make the capsules fall into the pipe one by one. The third way is to also arrange a vertical pipe in the hopper, set a rotating impeller with a horizontal shaft or a radial scraper with a vertical shaft at the upper part of the pipe to rotate and sweep the ground, or set a push block moving up and down at the edge of the pipe to activate the capsules around the upper part of the pipe, so that they fall into the pipe one by one. The two ways of setting vertical pipes also need to set a feeding device or a capsule stopping device to control the output of capsules one by one at equal intervals. That is, when one capsule comes out, other capsules need to be stopped from sliding down. The structure is complex, and if there are deformed capsules, half capsules or broken capsules in the pipe, the stopping mechanism is easy to get stuck with the normal capsule behind the deformed capsule, half capsule or broken capsule, resulting in uncontrollable subsequent feeding. The vertical pipe is also easy to block, which seriously affects the detection efficiency of the capsule weight detection scale.

[0004] There is a great need for capsule weight detection scales in the market, but the feeding efficiency of the existing technology seriously affects the detection efficiency of the capsule weight detection scale, so there is an urgent need for a high-efficiency capsule feeding method for the capsule weight detection scale. SUMMARY

[0005] The present application is directed to the deficiencies of the prior art, and proposes an automatic single-particle feeding device of a capsule weight detection scale.

[0006] The application discloses an automatic feeding device of a capsule weight checking scale, which comprises a material bin, a top feeding plate and a driving device.

[0007] The two side surfaces of the top feeding plate are perpendicular to the horizontal plane and the plane of the top feeding plate, and the projection of the top of the top feeding plate on the plane of the top feeding plate is a straight edge, which is referred to as the top straight edge of the top of the top feeding plate.

[0008] The top of the top feeding plate is formed into a long strip-shaped groove with an equal cross section along the length direction of the top straight edge of the top of the top feeding plate, and the end portion of the groove at the low position is referred to as a groove outlet, and the end portion at the high position is referred to as a groove inlet.

[0009] The side wall portion of the material bin corresponding to the side surface of the top feeding plate at which the groove outlet is located is referred to as a discharging side wall, and the outer side surface of the discharging side wall is a plane.

[0010] A long strip-shaped hole is formed on the discharging side wall, the length direction of the long strip-shaped hole is arranged along the vertical direction, and the width of the long strip-shaped hole is slightly larger than the diameter of the capsule; a discharging groove is formed on the bottom of the long strip-shaped hole along the thickness direction of the discharging side wall and is connected to the inside and outside of the material bin, and the discharging groove is inclined downward to the outside of the material bin.

[0011] The inner side wall of the discharging groove is a columnar surface.

[0012] The groove and the discharging groove form a discharging channel of the material bin.

[0013] When the top feeding plate is located at the top of the stroke, the groove outlet is inclined downward to the inlet of the discharging groove, and the capsules in the groove can slide in the groove to the discharging groove; when the top feeding plate is located at the bottom of the stroke, the groove inlet is lower than the bottom of the material bin.

[0014] The driving device is located outside the material bin, and the top feeding plate is connected with the driving device; the driving device is located at the lower edge of the material bin.

[0015] The specific features of the application also include that the end portion of the discharging groove at the inner side surface of the material bin is the inlet of the discharging groove, the end portion of the discharging groove at the outer side surface of the material bin is the outlet of the discharging groove, and the capsules can slide in the discharging groove automatically.

[0016] A gate is arranged on the outer side of the discharging side wall, the gate is in the form of a flat plate, and the gate reciprocates to realize the opening and closing of the outlet of the discharging groove or the long strip-shaped hole; when the gate is opened, the capsules in the discharging groove can slide downward.

[0017] The specific features of the application also include that the gate moves in a plane parallel to the plane of the outer side surface of the discharging side wall, and the gate abuts against each other or keeps a small gap.

[0018] The specific features of the present solution also include that the gate makes up-and-down linear reciprocating motion relative to the discharge side wall, and the gate blocks the outlet of the discharge chute when the gate is at the top of the stroke, and the top of the gate is lower than the outlet of the discharge chute when the gate is at the bottom of the stroke.

[0019] The specific features of the present solution also include that the gate is rigidly connected with or synchronously lifted with the ejection plate. The gate is rigidly connected with the ejection plate through a connecting plate.

[0020] The specific features of the present solution also include that the straight edge at the top of the ejection plate forms an angle of 25-60° with the horizontal plane.

[0021] The specific features of the present solution also include that the thickness of the ejection plate is 1.1-1.5 times the diameter of the capsule, and there is only one groove at the top of the flat plate.

[0022] The specific features of the present solution also include that the discharge chute meets the following requirements: the length direction of the cylindrical surface of the discharge chute forms an angle of 25-60° with the horizontal plane, and the length of the chute bottom along the length direction of the cylindrical surface of the discharge chute is 0.6-1.5 times the length of the capsule, so as to ensure that a single layer of capsules can lie flat along the length direction of the chute bottom and can only lie flat one capsule, otherwise, until the top of the gate is lowered to the height difference between the top of the gate and the chute bottom of the outlet of the discharge chute is one capsule height, other capsules lying on the chute bottom will always be turned over into the bin at angles of backward, left, right, etc.; the wall thickness of the discharge side wall at the chute bottom from inside to outside is 0.6-1.5 times the diameter of the capsule.

[0023] The specific features of the present solution also include that the inner wall of the discharge side wall is protruded from the part of the discharge chute downwards relative to other parts of the inner side of the discharge side wall, which is called a strip-shaped protrusion, the strip-shaped protrusion is a vertical arranged flat strip, the inner side of the flat strip is parallel to the outer side of the discharge side wall and is parallel and directly opposite to the side of the ejection plate close to the outlet of the groove, the ejection plate moves up and down relative to the strip-shaped protrusion, and the strip-shaped protrusion and the ejection plate are frictionally fitted or have a gap smaller than the radius of the capsule therebetween.

[0024] The specific features of the present solution also include that the part of the discharge chute at the top of the strip-shaped protrusion has two groove sides perpendicular to the horizontal plane, which are called vertical groove sides, the height of the vertical groove sides is zero at the inlet of the discharge chute, then gradually increases upwards and outwards at an angle of 30-75° with the horizontal plane, until the root of the strip-shaped protrusion, that is, the upper edge of the vertical groove side of the discharge chute is inclined inward and downward from the root of the strip-shaped protrusion. In this way, the chute bottom of the discharge chute cannot stand up two capsules at the same time, because until the top of the gate is lowered to the height difference between the top of the gate and the chute bottom of the outlet of the discharge chute is one capsule height, the capsule close to the inside of the bin will always be turned over or slide into the bin at angles of backward, left, right, etc.

[0025] The thickness of the vertical groove side of the discharge chute is 0.5-1.5 mm.

[0026] The specific features of the present solution also include that the width of the part of the strip-shaped protrusion located below the chute is narrower than the thickness of the top plate, which can make the capsules located in the outlet part of the chute more easily fall to the front side during the upward movement of the top plate.

[0027] The specific features of the present solution also include that the shape and size of the cylindrical surface of the chute are the same as those of the cylindrical surface of the chute.

[0028] The specific features of the present solution also include that the top plate is connected to the driving device through the connecting plate, and the top plate is connected to the driving device that can drive the upward and downward movement of the top plate through the connecting plate. The driving device can be a pneumatic cylinder, a motor and a lead screw driven by the motor, or a cam.

[0029] For the falling speed of the top plate controlled by the driven device, the time taken for the gate to move downward from the top of the stroke until the top of the gate is lower than the outlet of the chute is T. When the top plate is at the top of the stroke, the height difference between the top of the gate and the outlet of the chute needs to meet the following condition: during the time period T, the excess capsules in the chute, except those lying on the outlet of the chute, can fall with a high probability. When the top of the gate is lowered below the outlet of the chute, the capsules lying on the outlet of the chute will automatically slide out of the chute, achieving the purpose of single-particle dispensing.

[0030] The specific features of the present solution also include that the bottom of the hopper is a V-shaped bottom composed of a first bottom plate and a second bottom plate without closure, and the upper surfaces of the first and second bottom plates are both flat and form an angle of 25-60° with the horizontal plane (the capsules can automatically slide or roll to the V-shaped bottom). The intersection lines of the upper surfaces of the first and second bottom plates and the top plate are both horizontal lines, and the inlet of the chute is lower than the lower edge line of the upper surfaces of the first and second bottom plates when the top plate is at the bottom of the stroke.

[0031] The specific features of the present solution also include that the intersection of the discharge side wall and the bottom of the hopper is an inclined plane with an angle of 25-60° with the horizontal plane. When the top plate and the gate fall to the lowest position, a pit with a width greater than the diameter of the capsules will appear at the bottom of the hopper, and the capsules can roll or slide to the pit.

[0032] The specific features of the present scheme also include that two or more flat top plates are arranged to pass through the bottom of the hopper, the top of the top plate is provided with a groove, the discharge side wall of the hopper is provided with two or more long holes, two or more discharge grooves corresponding to the grooves on the top plate, and an independent gate corresponding to each discharge groove or a total gate corresponding to all discharge grooves, the bottom of the hopper between two adjacent top plates is a pointed top formed by the intersection of a left plane and a right plane, the intersection line is parallel to the horizontal plane and also parallel to the plane of the top plate, and the left plane and the right plane are both at an angle of 25-60° with the horizontal plane.

[0033] The specific features of the present scheme also include that the thickness of the top plate is 2-3 times the diameter of the capsule, the top of the top plate is provided with two parallel, close and symmetrical grooves, the discharge side wall is provided with one or two long holes corresponding to the two grooves and two discharge grooves, each groove corresponds to a discharge groove, a long pointed partition is arranged between the two grooves on the top plate in the length direction of the groove, the capsule cannot stay above the partition, the partition prevents other capsules from stopping above the capsule already in the groove, when the top plate is at the bottom of the stroke, the distance between the partition and the two side planes of the groove formed by the first bottom plate and the second bottom plate is greater than the diameter of the capsule, and the capsules on the first bottom plate can roll or fall into the groove corresponding to the side of the first bottom plate via the partition, and the capsules on the second bottom plate can roll or fall into the groove corresponding to the side of the second bottom plate via the partition.

[0034] The specific features of the present scheme also include that the groove cross-section is V-shaped or U-shaped, the groove cross-section width and depth can only accommodate one capsule with its cylindrical axis parallel to the length direction of the groove to lie on the groove to keep still or slide in the groove, and make other capsules on the same cross-section of the groove roll off. The groove can accommodate multiple linearly arranged capsules with their cylindrical axes parallel to the length direction of the groove.

[0035] The beneficial effects of the scheme are: 1. Compared with the wave plate material arrangement mode, the scheme does not have the problem of two capsule overlapping, does not have the problem of queuing capsule failure falling off the wave plate and queuing again, the time interval between the front and rear two capsules is controllable, and the feeding speed can be greatly improved. 2. Compared with the vertical pipeline queuing material arrangement mode, the scheme does not need to set horizontal shaft rolling brush or horizontal shaft rolling impeller or vertical shaft rotating sweeping disc at the pipeline inlet, and does not need to stop the capsule before the next capsule, so the structure is simple. 3. Compared with the vertical pipeline queuing material arrangement mode, a thickness of the top feeding plate can be suitable for many types of capsules, and multiple pipeline diameters are not needed to cope with various types of capsules, so the adaptability of the capsule type is stronger. 4. Compared with the vertical pipeline queuing material arrangement mode, there is no situation that the capsule is clamped due to the action failure of the capsule stopping or feeding mechanism, and the product contains broken capsules or half capsules, which does not affect the queuing and feeding. 5. The groove provided on the top feeding plate can facilitate the capsule to lie down and improve the queuing efficiency. 6. The gap between the top of the top feeding plate and the notch of the trough of the hopper is slightly larger than the width of the capsule diameter, which is particularly convenient for the capsule to enter the groove, the queuing success rate or efficiency is greatly improved, and only by increasing the stroke of the top feeding plate and the height of the gate, the notch can be made deeper, so that the falling capsule is more likely to lie down in the groove, thereby the queuing efficiency is higher; the highest queuing efficiency of the prior art is 2.2 capsules per channel per second, and the scheme can reach 2.9 capsules per channel per second, and the queuing efficiency is increased by 30%. 7. The gate is linked with the top feeding plate, and during the top feeding plate descending material taking process, the gate automatically feeds, and the feeding and feeding structure is simple. 8. When the top feeding plate is located at the top of the stroke, the height difference between the top of the gate and the outlet of the feeding trough makes the excess capsules except the capsules to be sent out which have already lain in the feeding trough have enough time to fall during the process of the gate top descending from the highest position to the outlet of the feeding trough, so that the success rate of single capsule feeding is greatly improved, and the probability of not successfully feeding in one stroke is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a three-dimensional schematic view of the top feeding plate of the application located at the bottom of the stroke and in the material taking state. Figure 2 is a front view of the hopper of Figure 1 after the baffle is installed. Figure 3 is a sectional view of Figure 2 E-E. Figure 4 is a partial enlarged view of Figure 1 II. Figure 5 is a back three-dimensional view of Figure 2 . Figure 6 is a front three-dimensional view of Figure 2 with a high perspective.

[0037] Figure 7 is a three-dimensional schematic view of the application in the feeding state. Figure 8 is a front view of the hopper of Figure 7 after the baffle is installed.Figure 9 for Figure 8 Cross-sectional view of DD. Figure 10 for Figure 7 Enlarged view of a section in the middle I area.

[0038] Figure 11 This is a three-dimensional schematic diagram of the top plate located at the top of the stroke and in the loading state in this invention. Figure 12 for Figure 11 The front view of the silo after the baffle is installed. Figure 13 for Figure 12 Cross-sectional view of the middle CC section.

[0039] Figure 14 This is a three-dimensional schematic diagram of two capsules standing upright on the feeding trough before feeding, according to the present invention. Figure 15 This is a three-dimensional schematic diagram of two capsules lying one on top of the other on the feeding trough before feeding.

[0040] Figure 16 This is a three-dimensional schematic diagram of the present invention with two or more top plates. Figure 17 This is a three-dimensional schematic diagram of a top plate with two grooves according to the present invention.

[0041] In the figure, 1-top plate; 2-groove; 3-discharge sidewall; 4-elongated hole; 5-feeding trough; 6-strip protrusion; 7-gate; 8-upright trough edge; 9-first bottom plate; 10-second bottom plate; 11-connecting plate; 12-drive device; 13-baffle; 14-first capsule; 15-second capsule; 16-left plane; 17-right plane. Detailed Implementation

[0042] Example 1: As Figures 1-6 As shown, an automatic dispensing device for a capsule checkweigher includes a hopper, a top plate 1, and a drive device 12. The top plate 1 is a flat plate perpendicular to the horizontal plane. The plate has two relatively parallel large-area surfaces, one of which is called the flat plate plane. The top plate 1 penetrates the bottom of the hopper and extends into the hopper, allowing it to move vertically up and down. The two sides of the top plate are planes perpendicular to the horizontal plane and the flat plate plane. The projection of the top of the top plate onto the flat plate plane is a straight edge, which is called the top straight edge of the top plate. The top straight edge of the top plate is inclined relative to the horizontal plane and its length is greater than the length of one capsule. The drive device 12 is located outside the hopper, and the top plate 1 is connected to the drive device 12. The drive device 12 is located below the outside of the hopper. The top of the top plate 1 is formed with a long, uniform cross-section groove 2 along the length of the top straight edge.

[0043] See Figure 3 and Figure 13, the first capsule 14 and the second capsule 15 can automatically slide in the groove 2, the end of the groove 2 at the low position is called the groove outlet, and the end of the groove 2 at the high position is called the groove inlet. The longer the groove 2 is, the higher the queuing efficiency is, and the faster the feeding efficiency is.

[0044] See Figure 1 , Figure 3 , Figure 4 , the side wall part of the silo corresponding to the side of the groove outlet of the top plate 1 is called the discharge side wall 3, and the outer side of the discharge side wall 3 is a plane;

[0045] A long hole 4 is made on the discharge side wall 3, the length direction of the long hole 4 is arranged along the vertical direction, and the width of the long hole 4 is slightly larger than the diameter of the capsule, see Figure 3 , Figure 4 , Figure 6 A discharge chute 5 connecting the inside and outside of the silo is made at the bottom of the long hole 4 along the thickness direction of the discharge side wall 3, the discharge chute 5 is inclined downward to the outside of the silo, the inner side wall of the chute body of the discharge chute 5 is a cylindrical surface, the groove 2 and the discharge chute 5 form the discharge channel of the silo, the end of the discharge chute 5 at the inner side of the silo is the discharge chute inlet, and the end of the discharge chute 5 at the outer side of the silo is the discharge chute outlet; see Figure 7 , Figure 8 , Figure 9 and Figure 10 The first capsule 14 can automatically slide in the discharge chute 5; the vertical height of the long hole 4 is greater than the length of one capsule, which can avoid the damage of the capsule caused by the vertical capsule being exactly positioned between the groove outlet and the top of the long hole 4 during the process of the top plate 1.

[0046] When the top plate 1 is located at the top of the stroke, see Figure 11 , Figure 12 , Figure 13 The outlet of the groove 2 is inclined downward to the discharge chute inlet, and the first capsule 14 in the groove 2 can slide in the groove to the discharge chute 5; when the top plate 2 is located at the bottom of the stroke, see Figure 1 , Figure 3 , Figure 4 The groove inlet is lower than the bottom of the silo.

[0047] Through the up-and-down reciprocating movement of the top plate 1, the capsules in the silo can be discharged from the discharge chute outlet out of the silo in a rhythmic and single-column manner through the transportation of the groove 2.

[0048] A gate 7 is arranged on the outer side of the discharge side wall 3, the gate 7 is a flat plate, and the gate 7 realizes the opening and closing of the discharge chute outlet or the long hole 4 through reciprocating movement. See Figure 7 , Figure 9 When the gate 7 is opened, the first capsule 14 in the discharge chute 2 can slide downward.

[0049] See Figure 3 ,Figure 9 、 Figure 13 , the gate 7 moves in a plane parallel to the plane of the outer side of the discharge side wall 3, abuts against each other or keeps a small gap.

[0050] The gate 7 moves up and down linearly relative to the discharge side wall 3, see Figure 13 When the gate 7 is at the top of the stroke, the gate 7 seals the outlet of the discharge chute, see Figure 3 When the gate 7 is at the bottom of the stroke, the top of the gate 7 is lower than the outlet of the discharge chute.

[0051] For a specific length of the discharge chute 5 and the capsule, the number of capsules that can be retained on the discharge chute 5 is limited by the gate, and a certain number of capsules can be issued each time.

[0052] The gate 7 is rigidly connected with the top plate 1 or synchronously lifted, see Figure 9 、 Figure 13 The gate 7 is rigidly connected with the top plate 1 through the connecting plate 11, which simplifies the synchronous control of the structure and action.

[0053] As shown in Figure 11 、 Figure 12 、 Figure 13 The acute angle between the straight edge at the top of the top plate 1 and the horizontal plane is 25-60°. The capsules can automatically slide in the chute with an acute angle greater than 25° with the horizontal plane. When multiple capsules slide in the chute with an angle greater than 60° with the horizontal plane, especially when they are suddenly stopped when sliding from the groove 2 to the discharge chute 5, the capsules are likely to collide and overlap vertically, which is not conducive to single-particle dispensing. The thickness of the top plate 1 is 1.1-1.5 times the diameter of the capsule, and there is only one groove 2 at the top of the flat plate.

[0054] In order to meet the requirement of issuing one capsule at a time, the discharge chute 5 also meets the following requirements: see Figures 1-6 and Figures 11-13 The acute angle between the length direction of the cylindrical surface of the discharge chute 5 and the horizontal plane is 25-60°, and the length of the chute bottom along the length direction of the cylindrical surface of the discharge chute 5 is 0.6-1.5 times the length of the capsule, which ensures that the single layer of the discharge chute 5 along the length direction of the chute bottom can lie flat and can only lie flat one capsule; the wall thickness of the discharge side wall 3 at the discharge chute 5 from inside to outside is 0.6-1.5 times the diameter of the capsule, see Figure 14 The chute bottom of the discharge chute 5 cannot stand up two capsules at the same time, because until the top of the gate 7 is lowered to the height difference between the top of the gate 7 and the chute bottom of the discharge chute outlet is one capsule high, the capsule close to the inside of the silo will always be turned or slide into the silo at angles such as backward, left, right, etc.

[0055] see Figure 4 and Figure 6The inner wall of the discharge side wall 3 from the bottom of the chute 5 to the bottom is protruded to the inner side of the discharge side wall 3, which is called strip protrusion 6. The strip protrusion 6 is a vertical flat strip, the inner side of which is parallel to the outer side of the discharge side wall 3 and the side of the top plate 1 near the groove outlet. The top plate 1 moves up and down relative to the strip protrusion 6, and the strip protrusion 6 and the top plate 1 are in frictional contact or have a gap smaller than the radius of the capsule.

[0056] To improve the efficiency and reliability of single particle feeding, see Figure 4 The part of the chute 5 at the top of the strip protrusion 6 has two vertical groove edges, which are called vertical edges 8. The height of the vertical edges 8 is zero at the entrance of the chute, then gradually increases outward and upward at an angle of 30-75° to the horizontal plane, until the root of the strip protrusion 6, that is, the upper edge of the vertical edges 8 of the chute 5 is inclined inward and downward from the root of the strip protrusion 3. In this way, see Figure 15 Until the top of the gate 7 is lowered to the height difference of one capsule from the bottom of the chute outlet, other capsules lying on the capsules already lying on the bottom of the chute 5 will always be turned over into the bin at angles such as backward, left, right, etc. The thickness of the vertical edges 8 of the chute 5 is 0.5-1.5mm.

[0057] See Figure 7 The width of the part of the strip protrusion 6 below the chute 5 is narrower than the thickness of the top plate 1, which can make the capsules in the groove outlet part of the top plate 1 more easily fall forward during the upward movement. The shape and size of the cylindrical surface of the chute 5 are the same as those of the cylindrical surface of the groove 2. The top plate 1 is connected to the driving device 12 through the connecting plate 11, and the top plate 1 is connected to the driving device 12 which can drive it to move up and down through the connecting plate 11. The driving device 12 can be a pneumatic cylinder, an electric motor and a lead screw driven by the electric motor, or a cam.

[0058] See Figure 13 , Figure 9 For the falling speed of the top plate 1 controlled by the driving device 12, the time T taken by the gate 7 to move downward from the top of the stroke until the top of the gate 7 is lower than the outlet of the chute, the height difference between the top of the gate 7 and the outlet of the chute when the top plate 1 is at the top of the stroke should meet the following conditions: during the time T, the excess capsules in the chute 5 can fall with a high probability except the capsules lying on the groove outlet. When the top of the gate 7 is lowered below the outlet of the chute, the capsules lying on the groove outlet will automatically slide out of the chute, improving the reliability of single particle feeding.

[0059] See Figure 4, the bottom of the hopper is a V-shaped bottom without closure composed of a first bottom plate 9 and a second bottom plate 10, both of which have flat upper surfaces, and the upper surfaces of the first bottom plate 9 and the second bottom plate 10 are at an angle of 25-60° with the horizontal plane (the capsules can automatically slide or roll to the V-shaped bottom), see Figure 10 , the intersection lines of the upper surfaces of the first bottom plate 9 and the second bottom plate 10 and the top plate 1 are horizontal lines, see Figure 4 , when the top plate 1 is at the bottom of the stroke, the groove entrances are all lower than the lower edge lines of the upper surfaces of the first bottom plate 9 and the second bottom plate 10.

[0060] see Figure 4 and Figure 10 , the intersection of the discharge side wall 3 and the bottom of the hopper is an inclined plane at an angle of 25-60° with the horizontal plane. see Figure 4 When the top plate 1 and the gate 7 fall to the lowest position, a pit with a width greater than the diameter of the capsule will appear at the bottom of the hopper, and the capsules can roll or slide into the pit.

[0061] The cross section of the groove 2 is V-shaped or U-shaped, and the cross section width and depth of the groove 2 can only accommodate one capsule with its cylindrical axis parallel to the length direction of the groove 2 to lie on the groove 2 to remain stationary or slide in the groove 2, and make other capsules on the same cross section of the groove 2 roll off. The groove 2 can accommodate multiple capsules in a straight line with their cylindrical axes parallel to the length direction of the groove 2.

[0062] When working, the height of the material poured into the hopper after the capsules is lower than the inlet of the discharge chute 5 by one length of the capsule, so that the capsules do not automatically overflow when the top plate 1 moves up and down, see Figure 11 , and also ensures that when the top plate 1 is at the highest position of the stroke, the other capsules stacked on the capsules that have already lain in the groove 2 have a sufficient height difference to completely fall off.

[0063] Material taking queue: see Figures 1-6 When the top plate 1 and the gate 7 fall to the lowest position of the stroke, a pit with a width greater than the diameter of the capsule appears at the bottom of the hopper. Most of the capsules at the bottom of the hopper with their length direction close to parallel to the plane of the top plate 1 will smoothly fill the gap caused by the falling of the top plate 1 and enter the pit. Finally, there is only one layer of capsules with their cylindrical axes parallel to the plane of the top plate 1 in the pit.

[0064] Single particle discharge preparation: see Figures 11-13When the top plate 1 rises to the top, the outlet of the groove 2 is opposite to the inlet of the discharge chute 5, and only the row of capsules next to the bottom of the groove 2 in the original pit groove will still be in the groove 2. The capsule closest to the outlet of the groove 2, if its cylinder is parallel to the groove 2 and lies in the groove 2, such as the first capsule 14, will automatically slide directly into the discharge chute 5, and if its cylinder is perpendicular to the horizontal plane and stands in the groove 2, it will also fall or slide into the discharge chute 5; if its cylinder is perpendicular to the plane of the top plate 1 and lies horizontally on the upper edge of the downwardly inclined groove 2, it will jump or roll on the outwardly and upwardly inclined vertical groove edge 8 of the discharge chute 5 due to inertia caused by the sudden stop of the top plate 1 after rising, and finally either fall back onto the upper edge of the groove outlet and continue to lie down, ready to mix with other capsules for the next queuing, or fall off the inclined vertical groove edge 8 of the discharge chute 5 into the hopper, or possibly fall onto the discharge chute 5. Because the inclined vertical groove edge 8 of the discharge chute 5 is inclined inwardly and downwardly, capsules cannot lie horizontally on the upper edge of the discharge chute 5 to block the passage.

[0065] If the first capsule 14 has already lain horizontally on the discharge chute 5, the gate 7 will block the subsequent capsules on the groove 2 by the first capsule 14, preventing them from continuing to slide down;

[0066] Single-particle discharge: see Figure 7 、 Figure 9 、 Figure 10 When the top plate 1 and the gate 7 descend simultaneously until the top of the gate 7 is lower than the outlet of the discharge chute, the first capsule 14 on the discharge chute 5 automatically slides out by gravity, realizing the single-particle feeding to the subsequent equipment, and finally, see Figure 11 、 Figure 13 The second capsule 15 adjacent to the first capsule 14 in the groove 2 when the top plate 1 rises to the top falls into the hopper with the top plate 1 to participate in the next queuing.

[0067] The queuing process is repeated again, and the capsules in the hopper are discharged one by one.

[0068] Increasing the stroke of the top plate 1 and the height of the gate 7 can make the pit groove deeper, making it easier for the falling capsules to lie in the groove, thereby increasing the queuing efficiency; the highest queuing efficiency of the prior art is 2.2 capsules per channel per second, and the present application can reach 2.9 capsules per channel per second, with an increase of 30% in queuing efficiency.

[0069] Example 2: An automatic feeding device for a capsule weight scale, which is the same as example 1, except that, see Figure 16, two or more top plates 1 are arranged in the bottom of the hopper, the top plates 1 are flat, penetrate the bottom of the hopper, are parallel to each other, and have a distance greater than the length of a capsule, and the top of each top plate 1 is provided with a groove 2, two or more long holes 4 and two or more discharge grooves 5 are arranged on the discharge side wall 3 of the hopper, the two or more discharge grooves 5 correspond to the grooves 2 on the top plates 1, and each discharge groove 5 is provided with an independent gate 7 or a general gate 7 corresponding to all the discharge grooves, the bottom of the hopper between two adjacent top plates 1 is in the shape of a pointed top formed by the intersection of a left plane 16 and a right plane 17, the intersection line is parallel to the horizontal plane and also parallel to the plane of the top plate 1, and the left plane 16 and the right plane 17 each form an angle of 25-60° with the horizontal plane.

[0070] Embodiment 3: An automatic feeding device of a capsule weight checking scale, which is the same as that in Embodiment 1, and the difference lies in that Figure 17 , the thickness of the top plate 1 is 2-3 times the diameter of the capsule, two parallel, close and symmetrical grooves 2 are arranged on the top of the top plate 1, one or two long holes 4 are arranged on the discharge side wall 3 corresponding to the two grooves 2, two discharge grooves 5 are arranged, each groove 2 corresponds to a discharge groove 5, a long pointed partition is arranged between the two grooves 2 on the top plate 1 along the length direction of the grooves 2, the capsule cannot stay on the partition, the partition prevents other capsules from staying on the capsule already in the groove 2, when the top plate 1 is at the bottom of the stroke, the distance between the partition and the two side planes of the pit formed by the first bottom plate 9 and the second bottom plate 10 at the bottom of the hopper is greater than the diameter of the capsule, and the capsules on the first bottom plate 9 can roll or fall into the groove 2 corresponding to the side of the first bottom plate 9 via the partition, and the capsules on the second bottom plate 10 can roll or fall into the groove 2 corresponding to the side of the second bottom plate 10 via the partition.

[0071] Embodiment 4: An automatic feeding device of a capsule weight checking scale, which is the same as that in Embodiment 1, and the difference lies in that the driving device 12 is located on the side of the hopper outside, and is rigidly connected through the side of the top plate 1 corresponding to the groove inlet.

[0072] Embodiment 5: An automatic feeding device of a capsule weight checking scale, which is the same as that in Embodiment 1, and the difference lies in that the gate 7 is a rotary door, and the rotation axis of the rotary door is located in a plane parallel to the outside of the discharge side wall 3 at the position of the outlet of the corresponding discharge groove.

[0073] Embodiment 6: An automatic feeding device of a capsule weight checking scale, which is the same as that in Embodiment 1, and the difference lies in that the reciprocating motion of the gate 7 is horizontal straight line motion in a plane parallel to the outside of the discharge side wall 3 at the position of the outlet of the corresponding discharge groove, or is circular motion in a plane parallel to the outside of the discharge side wall 3 at the position of the outlet of the corresponding discharge groove.

Claims

1. An automatic feed device for a capsule checkweigher, comprising a hopper, a top plate and a drive device, characterised in that, The top plate is a flat plate perpendicular to the horizontal plane, the flat plate has two opposite parallel large-area surfaces, the plane where one of the large-area surfaces is located is referred to as the flat plate plane, the top plate penetrates through the bottom of the silo and extends into the silo and can move vertically up and down, the two side surfaces of the top plate are perpendicular to the horizontal plane and the flat plate plane, the projection of the top of the top plate on the flat plate plane is a straight edge, the straight edge is referred to as the top of the top plate straight edge, the top of the top plate straight edge is inclined relative to the horizontal plane and has a length greater than the length of one capsule, the top of the top plate is made into a long strip-shaped equal-section groove along the length direction of the top of the top plate straight edge, the end of the groove located at the low position is the groove outlet, the end of the groove located at the high position is the groove inlet, the side wall part of the silo corresponding to the side surface where the groove outlet of the top plate is located is referred to as the discharge side wall, the outer side surface of the discharge side wall is a plane, a long strip hole is made on the discharge side wall, the length direction of the long strip hole is arranged along the vertical direction, and the width of the long strip hole is slightly greater than the diameter of the capsule, the bottom of the long strip hole is made into a discharging chute connecting the inside and outside of the silo along the thickness direction of the discharge side wall, the discharging chute is inclined downward to the outside of the silo, the inner side wall of the chute body of the discharging chute is a cylindrical surface, the groove and the discharging chute constitute the discharging channel of the silo, and the driving device is located outside the silo and connected with the top plate.

2. The automatic feed device of a capsule checkweigher according to claim 1, characterized in that, The end of the discharging chute located at the inner side surface of the silo is the discharging chute inlet, the end of the discharging chute located at the outer side surface of the silo is the discharging chute outlet, a gate is arranged on the outer side of the discharge side wall, and the gate reciprocatingly moves to open or close the discharging chute outlet or the long strip hole.

3. The automatic feed device of a capsule checkweigher according to claim 2, characterized in that, The gate moves in a plane parallel to the plane of the outer side surface of the discharge side wall, and the gate abuts against each other or keeps a small gap.

4. The automatic feed device for capsule checkweigher according to claim 3, characterized in that, The gate reciprocatingly moves up and down relative to the discharge side wall, the gate seals the discharging chute outlet when the gate is located at the top of the stroke, and the top of the gate is lower than the discharging chute outlet when the gate is located at the bottom of the stroke.

5. The automatic feed device for capsule checkweigher according to claim 2, characterized in that, The gate is rigidly connected with the top plate or synchronously lifts and lowers.

6. The automatic feed device for capsule checkweigher according to claim 1, characterized in that, The angle between the top of the top plate straight edge and the horizontal plane is 25-60°.

7. The automatic feed device for capsule checkweigher according to claim 1, characterized in that, The thickness of the top plate is 1.1-1.5 times the diameter of the capsule, and the top of the top plate has only one groove.

8. The automatic feed device for capsule checkweigher according to claim 1, characterized in that, The discharging chute simultaneously satisfies: the length direction of the cylindrical surface of the discharging chute is inclined to the horizontal plane at an angle of 25-60°, the length of the discharging chute bottom along the length direction of the cylindrical surface of the discharging chute is 0.6-1.5 times the length of the capsule, and the wall thickness of the discharge side wall outward from the inside at the discharging chute bottom is 0.6-1.5 times the diameter of the capsule.

9. The automatic feed device for capsule checkweighing scales according to claim 1, characterized in that, The part of the inner wall of the discharge side wall downward from the discharging chute is protruded relative to other parts of the inner side of the discharge side wall, referred to as a strip-shaped protrusion, the strip-shaped protrusion is a vertically arranged flat strip, the inner side surface of the flat strip is parallel to the outer side surface of the discharge side wall and parallel to and directly opposite the side edge of the top plate close to the groove outlet, the top plate moves up and down relative to the strip-shaped protrusion, and the strip-shaped protrusion and the top plate are frictionally attached to each other or keep a gap smaller than the radius of the capsule.

10. The automatic feed device for capsule checkweighing scales according to claim 9, characterized in that, The part of the discharging chute located at the top of the strip-shaped protrusion has two groove edges perpendicular to the horizontal plane, referred to as vertical groove edges, and the upper edge of the vertical groove edge of the discharging chute is inclined inward and downward from the root of the strip-shaped protrusion.

11. The automatic feed device for capsule checkweighing scales according to claim 10, characterized in that, The height of the vertical groove edge is zero at the discharging chute inlet, then gradually increases upward and outward at an angle of 30-75° to the horizontal plane until the root of the strip-shaped protrusion.

12. The automatic feed device for capsule checkweighing scales according to claim 9, characterized in that, The width of the strip-shaped protrusion at the part below the discharge slot is narrower than the thickness of the top plate.

13. The automatic feed device for capsule checkweighing scales according to claim 1, characterized in that, The shape and size of the columnar surface of the discharge slot are the same as those of the groove columnar surface.

14. The automatic feed device for capsule checkweighing scales according to claim 1, characterized in that, The bottom of the hopper is a V-shaped bottom without closure composed of a first bottom plate and a second bottom plate with their upper surfaces being flat, the upper surfaces of the first bottom plate and the second bottom plate are each at an angle of 25-60° with the horizontal plane, the intersection lines of the upper surfaces of the first bottom plate and the second bottom plate with the top plate are all horizontal lines, and the groove inlets are all lower than the lower edge lines of the upper surfaces of the first bottom plate and the second bottom plate when the top plate is at the bottom of the stroke.

15. The automatic feed device for capsule checkweighing scales according to claim 1, characterized in that, The intersection of the discharge side wall with the bottom of the hopper is an inclined plane at an angle of 25-60° with the horizontal plane.

16. The automatic batching device for capsule checkweigher according to claim 1, characterized in that, Two or more than two top plates with grooves in the top part are arranged in parallel and with a distance greater than the length of one capsule through the bottom of the hopper, two or more than two long holes and two or more than two discharge slots are arranged on the discharge side wall of the hopper in one-to-one correspondence with the grooves on the top plate, and a separate gate corresponding to each discharge slot or a total gate corresponding to all discharge slots are further included, the bottom of the hopper between two adjacent top plates is a pointed top formed by the intersection of a left plane and a right plane, the intersection line is parallel to the horizontal plane and also parallel to the plane of the top plate, and the left plane and the right plane are each at an angle of 25-60° with the horizontal plane.

17. The automatic feed device for capsule checkweighing scales according to claim 1, characterized in that, The thickness of the top plate is 2-3 times the diameter of the capsule, two parallel, close and symmetrical grooves are arranged on the top part of the top plate, one or two long holes and two discharge slots are arranged on the discharge side wall corresponding to the two grooves, each groove corresponds to one discharge slot, a long pointed partition is arranged between the two grooves on the top plate in the length direction of the groove, and the distance between the partition and the two side planes of the pit formed by the first bottom plate and the second bottom plate at the bottom of the hopper is greater than the diameter of the capsule.

18. The automatic batching device for capsule checkweigher according to claim 1, characterized in that, The cross section of the groove is V-shaped or U-shaped, and the cross section width and depth can only accommodate one capsule with its cylindrical axis parallel to the length direction of the groove lying on the groove. The cross section of the groove is V-shaped or U-shaped, and the cross section width and depth can only accommodate one capsule with its cylindrical axis parallel to the length direction of the groove lying on the groove.

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