A capping mechanism for a medicine filling machine

Abstract

The present invention discloses a capping mechanism of a medicine filling machine, comprising: a filling tube, a docking portion formed at the bottom end thereof; a cap screwing assembly arranged directly below the filling tube, wherein a cap falling channel penetrating from the top to the bottom thereof is formed; and a posture maintaining assembly, comprising an elastic reset component and a maintaining sleeve fixedly sleeved on the docking portion, wherein the interior of the maintaining sleeve is hollow and open at the bottom to form a docking port, and at least part of the docking portion is inserted from the top of the maintaining sleeve and extends into the interior of the maintaining sleeve. According to the present invention, it is not necessary to reload the next cap from the bottom of the capping mechanism after the previous cap is screwed, and a self-contained continuous supply of caps can be realized, thereby reducing the capping steps and improving the capping efficiency.

Description

Technical Field

[0001] The invention relates to the field of medicine filling, and in particular to a capping mechanism of a medicine filling machine. Background Art

[0002] In the field of drug filling, it is well known that different structural forms of screw capping mechanisms are used to screw cap and seal the filled medicine bottles. In the process of studying and implementing the screw capping and sealing of medicine bottles, researchers found that the screw capping mechanisms in the prior art have at least the following problems:

[0003] The existing capping mechanism needs to reload the next cap from the bottom of the capping mechanism after the previous cap is screwed on, which cannot realize the self-sufficient continuous supply of caps, resulting in cumbersome capping steps, time-consuming and inefficient capping operations.

[0004] In view of this, it is necessary to develop a capping mechanism for a medicine filling machine to solve the above problems. Summary of the invention

[0005] In order to overcome the problems existing in the above-mentioned capping mechanism, the technical problem to be solved by the present invention is to provide a capping mechanism for a medicine filling machine, which does not require the next cap body to be reloaded from the bottom of the capping mechanism after the previous cap body is screwed, and can realize self-sufficient continuous supply of cap bodies, thereby reducing the capping steps and improving the capping efficiency.

[0006] As for the capping mechanism, the present invention is a capping mechanism for a medicine filling machine that solves the above technical problems and includes:

[0007] A filling tube having a butt joint formed at its bottom end;

[0008] A cover screw-in assembly disposed directly below the filling tube, wherein a cover falling channel is formed therein and runs through from the top to the bottom thereof; and

[0009] A posture maintaining assembly, comprising an elastic reset component and a maintaining sleeve fixedly sleeved on the docking portion, wherein the interior of the maintaining sleeve is hollow and open at the bottom to form a docking port, and at least a portion of the docking portion is inserted from the top of the maintaining sleeve and extends into the interior of the maintaining sleeve;

[0010] Among them, the top end of the cover body screw-in assembly is inserted into the interior of the maintaining sleeve from the docking port, and the cover body falling channel is aligned with the docking portion; the cover body screw-in assembly can slide in the vertical direction relative to the maintaining sleeve to switch between the approaching state and the distant state; the elastic reset component acts between the maintaining sleeve and the cover body screw-in assembly; the elastic reset component can undergo elastic deformation, and when the vertical upward holding force applied to the cover body screw-in assembly is less than the elastic restoring force of the elastic reset component, the cover body screw-in assembly can slide downward in the vertical direction to reset from the approaching state to the distant state.

[0011] Optionally, a fixed mounting seat is further included, and the filling tube is rotatably mounted in the mounting seat so that the docking portion is exposed from the bottom of the mounting seat.

[0012] Optionally, the loading tube is provided with a loading channel running through its upper and lower ends, and the cover body is loaded from the top of the loading channel and slides out from the bottom and finally falls into the cover body falling channel, so that multiple cover bodies are stacked in sequence in the cover body falling channel to form a cover body stack, wherein at least one cover body is temporarily stored in the docking portion of the loading tube; when the cover body screw-in assembly is in the approaching state, the loading tube is inserted into the cover body falling channel and acts on the cover body at the top of the cover body stack, so that the cover body stack moves downward as a whole and finally causes the cover body at the bottom of the cover body stack to leave the cover body falling channel.

[0013] Optionally, at least three groups of cover retaining structures arranged around the filling channel are provided near the bottom of the filling channel, and the cover retaining structures include:

[0014] a straight line segment, which is embedded in the inner wall of the filling tube and is rotatably connected to the filling tube;

[0015] A bent section, which is fixed to the bottom of the straight section and has an inclination angle α extending obliquely outward, so that the bottom diameter of the filling channel is gradually reduced from top to bottom; and

[0016] an elastic supporting member elastically supported between the bending section and the inner side wall of the filling tube;

[0017] Among them, the straight section can rotate relative to the loading tube so that the cover body holding structure can switch between a holding state and a release state; the elastic support component can undergo elastic deformation, and when the lateral pressure from the cover body to the bent section is greater than the elastic restoring force of the elastic support component, the straight section can rotate relative to the loading tube to restore from the holding state to the release state.

[0018] Optionally, a downward-pressing docking channel is formed at the top end of the cover body falling channel, and the downward-pressing docking channel includes a straight matching section and an inclined guiding section which are sequentially connected from top to bottom, wherein the inner diameter of the straight matching section is greater than or equal to the outer diameter of the filling tube, and the inner diameter of the inclined guiding section is gradually reduced from top to bottom to make a size transition between the straight matching section and the cover body falling channel.

[0019] Optionally, a sealing ring is provided on the outer side of the bottom of the filling tube, and when the filling tube is inserted into the downward-pressed docking channel, the sealing ring forms a seal between the filling tube and the straight-line mating section.

[0020] Optionally, a vacuum generator is also included, and the air extraction pipeline of the vacuum generator is connected to the downward pressure docking channel.

[0021] Optionally, when the cover body screw-in assembly is in the approaching state, the loading tube is inserted into the downward-pressing docking channel and acts on the cover body at the top of the cover body stack so that the cover body stack moves downward as a whole and eventually causes the cover body at the bottom of the cover body stack to leave the cover body falling channel, and then when the cover body screw-in assembly gradually returns to the leaving state under the action of the elastic reset component, the vacuum generator starts to vacuum the downward-pressing docking channel, and the cover body at the bottom of the loading channel starts to laterally compress the bending section under the action of the suction force and eventually makes the lateral compressing force greater than the restoring force of the elastic support component, thereby causing the cover body to slip off the loading channel and fall into the downward-pressing docking channel.

[0022] Optionally, at least two cover body buffer units are arranged around the bottom outlet of the cover body falling channel, and the cover body buffer units are arranged opposite to each other and spaced apart to form a cover body buffer space between the two, and the cover body buffer space is aligned with the cover body buffer unit; the cover body buffer unit includes:

[0023] A cache body, which is rotatably connected to the cover body screw-in assembly;

[0024] A cache recovery component, which elastically acts between the cache body and the cover screw-in assembly;

[0025] A cache upper limit portion extending horizontally outward from the top inner side of the cache body; and

[0026] A cache lower limit portion, which extends horizontally outward from the outer side of the bottom of the cache body;

[0027] Among them, the cache upper limit part and the cache lower limit part are arranged relatively to each other in the upper and lower parts to limit the top and the top of the cover body cache space respectively; the cover body cache unit can rotate relative to the cover body screw-in assembly to switch between a cache state and a release state, and the cache upper limit part and the cache lower limit part protrude from the inner wall of the cover body falling channel; the cache recovery component elastically acts between the cache body and the cover body screw-in assembly, so that after the cover body cache unit releases the cached cover in the release state, the cache recovery component can reset the cover body cache unit to the cache state.

[0028] Optionally, a screw-on cover structure is provided at the bottom of the cover screw-in assembly and is located directly below the cover cache unit, and the screw-on cover structure includes:

[0029] A cover screwing channel, which is aligned with the cover body buffer space;

[0030] A cover retaining ring, which is disposed around the bottom of the cover screwing channel and is fixedly connected to the cover screwing assembly; and

[0031] At least three cover retaining members are embedded in the side wall of the cover retaining ring.

[0032] Among them, a clamping reset component is elastically supported between the cover retaining component and the cover retaining ring. When the cover retaining component is in an initial state, its end protrudes from the side wall of the cover retaining ring. When the end of the cover retaining component is compressed, it is completely immersed in the side wall of the cover retaining ring. The diameter of the screw cap channel is consistent with the outer peripheral diameter of the cover.

[0033] One of the above technical solutions has the following advantages or beneficial effects: since it can periodically supply a single cover to the cover screw-in assembly through the filling tube, there is no need to reload the next cover from the bottom of the cover screwing mechanism after the previous cover is screwed, and self-sufficient continuous supply of covers can be achieved, thereby reducing the number of cover screwing steps and improving the cover screwing efficiency.

[0034] Another technical solution among the above technical solutions has the following advantages or beneficial effects: since a downward-pressing docking channel is formed at the top end of the cover body falling channel, the downward-pressing docking channel includes a straight matching section and an inclined guiding section which are sequentially connected from top to bottom, wherein the inner diameter of the straight matching section is greater than or equal to the outer diameter of the filling tube, and the inner diameter of the inclined guiding section is gradually contracted from top to bottom to make a size transition between the straight matching section and the cover body falling channel, so that the cover body can be smoothly guided and finally slide into the cover body falling channel.

[0035] Another technical solution among the above technical solutions has the following advantages or beneficial effects: since the cover body is a frustum-shaped structure with a small outer diameter at the top and a large outer diameter at the bottom, when at least two cover bodies are stacked up and down to form a cover body stack, the top of the next cover body can be at least partially wedged into the bottom opening of the previous cover body, so that a step can be formed between the lower edge of the opening of the previous cover body and the outer side of the top of the next cover body; a holding cavity is formed near the bottom of the loading channel and is recessed on the inner side wall of the loading tube. When the cover body holding structure is in a holding state, the bent section at least partially protrudes out of the holding cavity, so that the bending sections between the two sections can be adjusted. At least part of the distance between them is smaller than the inner diameter of the filling channel, so that the bent section can lift and hold the bottom of the next cover body to prevent it from falling, thereby keeping the next cover body in the filling channel; when the cover holding structure is in a released state, the bent section is completely retracted and accommodated in the holding cavity, and at the same time, the top of the straight section protrudes out of the holding cavity and makes the top of the straight section wedged under the step portion, so that the straight section can lift and hold the previous cover body to prevent it from falling, and the bottom of the next cover body loses the support of the bent section and falls from the bottom opening of the filling channel and finally falls into the cover falling channel under the filling tube.

[0036] Another technical solution in the above technical solution has the following advantages or beneficial effects: because the cover body cache unit releases the cached cover body in the release state, the cover body falls into the screw-on capping channel, and the cover body can be temporarily stored in the screw-on capping channel under the limit of the cover body holding component, when the mouth of the medicine bottle to be screwed on invades into the screw-on capping channel from the bottom of the screw-on capping channel, at least the mouth of the medicine bottle is inserted into the cover body, at this time, driving the filling tube to rotate and driving the mouth of the medicine bottle to further invade the screw-on capping channel can smoothly tighten the cover body onto the mouth of the medicine bottle, after the tightening operation is completed, the cover body leaves the bottom of the screw-on capping channel together with the medicine bottle, thereby changing the screw-on capping channel to an empty state, and during the screwing process, the medicine bottle can also provide an upward holding force to the cover body screw-in assembly, so that the cover body screw-in assembly can slide upward in the vertical direction to switch from the away state to the The cover body is then moved back into the cover body storage space and the cover body is moved back into the storage space by the cover body storage unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0038] Figure 1 A longitudinal sectional view of a capping mechanism of a medicine filling machine according to one embodiment of the present invention;

[0039] Figure 2 It is a partial enlarged view of a cap holding structure in a capping mechanism of a medicine filling machine according to one embodiment of the present invention;

[0040] Figure 3 It is a longitudinal cross-sectional view of the cover body buffer unit and the cover body in the capping mechanism of the medicine filling machine according to one embodiment of the present invention when they are matched. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like components.

[0043] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "one" or "the" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] In the following description, words such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are defined relative to the structure shown in the drawings. In particular, "height" is equivalent to the dimension from top to bottom, "width" is equivalent to the dimension from left to right, and "depth" is equivalent to the dimension from front to back. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directions should not be interpreted as restrictive terms.

[0045] Terms related to attachment, coupling, and the like (eg, "connected" and "attached") refer to either a fixed or attached relationship between structures, either directly or indirectly, and either movable or rigid attachments or relationships, unless expressly stated otherwise, of the structures to one another through intermediate structures.

[0046] Example 1

[0047] Figure 1~Figure 3 Embodiment 1 of the present invention is shown, combined with Figure 1 As shown in FIG. 1 , it can be seen that the capping mechanism 1 of the medicine filling machine includes:

[0048] The filling tube 112 has a docking portion 1122 formed at its bottom end;

[0049] A cover screw-in assembly 13 disposed directly below the filling tube 112, wherein a cover falling channel 1323 is formed therein and passes through from the top to the bottom thereof; and

[0050] The posture maintaining assembly 12 comprises an elastic reset component 123 and a maintaining sleeve 121 fixedly sleeved on the docking portion 1122, wherein the interior of the maintaining sleeve 121 is hollow and open at the bottom to form a docking port, and at least a portion of the docking portion 1122 is inserted from the top of the maintaining sleeve 121 and extends into the interior of the maintaining sleeve 121;

[0051] Among them, the top end of the cover body screw-in component 13 is inserted into the interior of the maintaining sleeve 121 from the docking port, and the cover body falling channel 1323 is aligned with the docking portion 1122; the cover body screw-in component 13 can slide in the vertical direction relative to the maintaining sleeve 121 to switch between the approaching state and the distant state; the elastic reset component 123 acts between the maintaining sleeve 121 and the cover body screw-in component 13; the elastic reset component 123 can undergo elastic deformation, and when the vertical upward supporting force applied to the cover body screw-in component 13 is less than the elastic restoring force of the elastic reset component 123, the cover body screw-in component 13 can slide downward in the vertical direction to reset from the approaching state to the distant state. Since it can periodically supply a single cover 14 to the cover screw-in assembly 13 through the filling tube 112, there is no need to reload the next cover 14 from the bottom of the cover screwing mechanism after the previous cover 14 is screwed, and a self-sufficient cover continuous supply can be achieved, thereby reducing the number of screwing steps and improving the screwing efficiency. For example, the elastic reset component 123 can be, but is not limited to, a spring and / or a torsion spring, or, as long as the elastic reset component 123 performs the function described herein, it can be of any structure. For another example, a first shoulder 133 is formed on the cover screw-in assembly 13, a second maintaining shoulder 122 is formed on the maintaining sleeve 121, and the elastic reset component 123 is elastically supported between the first shoulder 133 and the second maintaining shoulder 122.

[0052] Refer again Figure 1 The capping mechanism 1 of the medicine filling machine includes a filling assembly 11, which includes a fixed mounting seat 111 and an upper rolling bearing 113 and a lower rolling bearing 114 embedded in the mounting seat 111. The filling tube 112 is rotatably mounted in the mounting seat 111 through the upper rolling bearing 113 and the lower rolling bearing 114, and the docking portion 1122 is exposed from the bottom of the mounting seat 111. Therefore, the filling tube 112 can be driven to rotate around its axis by a rotating driver.

[0053] Refer again Figure 1 The filling tube 112 is provided with a filling channel 1121 which runs through its upper and lower ends. The cover 14 is loaded from the top of the filling channel 1121 and slides out from the bottom and finally falls into the cover falling channel 1323, so that multiple cover bodies 14 are stacked in sequence in the cover falling channel 1323 to form a cover body pile, wherein at least one cover body 14 is temporarily stored in the docking portion 1122 of the filling tube 112; when the cover body screw-in assembly 13 is in the approaching state, the filling tube 112 is inserted into the cover body falling channel 1323 and acts on the cover body 14 at the top of the cover body stack, so that the cover body stack moves downward as a whole and finally makes the cover body 14 at the bottom of the cover body stack leave the cover body falling channel 1323, thereby completing the single supply of the cover body 14.

[0054] Reference Figure 1 and Figure 2 At least three groups of cover holding structures 115 are arranged around the filling channel 1121 near the bottom of the filling channel 1121, and the cover holding structures 115 include:

[0055] A straight section 1151, which is embedded in the inner wall of the filling tube 112 and is rotatably connected to the filling tube 112 at a hinge 1154;

[0056] The bent section 1152 is fixedly connected to the bottom of the straight section 1151, and the outer side surface 1152' thereof is formed with an inclination angle α extending obliquely outward, so that the bottom diameter size of the filling channel 1121 is gradually reduced from top to bottom; and

[0057] An elastic supporting member 1153, which is elastically supported between the bending section 1152 and the inner wall of the filling tube 112;

[0058] The straight segment 1151 can rotate relative to the loading tube 112 to switch the cover holding structure 115 between the holding state and the release state; the elastic support component 1153 can be elastically deformed, and when the lateral pressure from the cover 14 on the bent segment 1152 is greater than the elastic restoring force of the elastic support component 1153, the straight segment 1151 can rotate relative to the loading tube 112 to return from the holding state to the release state. Figure 1 In the illustrated embodiment, the inclination angle α is in the range of 10° to 75°.

[0059] The cover body 14 is a frustum-shaped structure with a small outer diameter at the top and a large outer diameter at the bottom, so that when at least two cover bodies 14 are stacked up and down to form a cover body stack, the top of the next cover body 14 can be at least partially wedged into the bottom opening of the previous cover body 14, so that a step portion 141 can be formed between the lower edge of the opening of the previous cover body 14 and the outer side of the top of the next cover body 14; a retaining cavity 1123 is formed near the bottom of the filling channel 1121 and is recessed on the inner side wall of the filling tube 112. When the cover body retaining structure 115 is in a retaining state, the bent sections 1152 at least partially protrude outside the retaining cavity 1123, so that at least part of the distance between the two bent sections 1152 is smaller than the inner diameter of the filling channel 1121, thereby making the bent sections 1152 The bent section 1152 can lift and hold the bottom of the next cover body 14 to prevent it from falling, thereby holding the next cover body 14 in the loading channel 1121; when the cover body holding structure 115 is in a released state, the bent section 1152 is completely retracted and accommodated in the holding cavity 1123, and at the same time, the top of the straight section 1151 protrudes out of the holding cavity 1123 and makes the top of the straight section 1151 wedged under the step portion 141 so that the straight section 1151 can lift and hold the previous cover body 14 to prevent it from falling, and the bottom of the next cover body 14 loses the support of the bent section 1152 and falls from the bottom opening of the loading channel 1121 and finally falls into the cover body falling channel 1323 under the loading tube 112.

[0060] Refer again Figure 1 The top of the cover body falling channel 1323 is connected to form a downward pressing docking channel, and the downward pressing docking channel includes a straight matching section 1321 and an inclined guiding section 1322 which are sequentially connected from top to bottom, wherein the inner diameter of the straight matching section 1321 is greater than or equal to the outer diameter of the filling tube 112, and the inner diameter of the inclined guiding section 1322 is gradually reduced from top to bottom to make a size transition between the straight matching section 1321 and the cover body falling channel 1323, so that the cover body 14 can be smoothly guided and finally slide into the cover body falling channel 1323.

[0061] Furthermore, a sealing ring is provided on the outer side of the bottom of the filling tube 112 , and when the filling tube 112 is inserted into the downward-pressed docking channel, the sealing ring forms a seal between the filling tube 112 and the straight-line mating section 1321 .

[0062] Furthermore, the capping mechanism 1 of the medicine filling machine further comprises a vacuum generator, and the air extraction pipeline 1325 of the vacuum generator is connected to the downward pressing docking channel. Figure 1 In the illustrated embodiment, the air extraction duct 1325 is in communication with the straight coupling section 1321 .

[0063] Refer again Figure 1 When the cover body screw-in assembly 13 is in the approaching state, the filling tube 112 is inserted into the downward pressing docking channel and acts on the cover body 14 at the top of the cover body stack, causing the cover body stack to move downward as a whole and eventually causing the cover body 14 at the bottom of the cover body stack to leave the cover body falling channel 1323. Subsequently, when the cover body screw-in assembly 13 gradually returns to the leaving state under the action of the elastic reset component 123, the vacuum generator begins to evacuate the downward pressing docking channel. Under the action of the suction force, the bottom 1142 of the cover body 14 at the bottom of the filling channel 1121 begins to laterally compress the bending section 1152 and eventually makes the lateral compressive force greater than the restoring force of the elastic support component 1153, thereby causing the cover body 14 to slip off the filling channel 1121 and fall into the downward pressing docking channel. Figure 1 In the illustrated embodiment, a circle of check ring 1324 is provided at the junction of the straight section 1151 and the bent section 1152. The check ring 1324 is configured as a ratchet check tooth structure, so that the check ring 1324 can rotate downward by a certain angle relative to its root when subjected to a downward pressure force, thereby allowing the cover body 14 to pass downward, and the check ring 1324 can rotate upward by a certain angle relative to its root when subjected to an upward pressure force and prevent the cover body 14 from sliding upward, thereby preventing the cover body 14 from detaching from the cover body falling channel 1323 under the action of the vacuum suction force and entering the downward pressure docking channel.

[0064] Example 2

[0065] Figure 1 and Figure 3 Embodiment 2 of the present invention is also shown. The difference between Embodiment 2 and Embodiment 1 is that:

[0066] At least two cover body buffer units 134 are arranged around the bottom outlet of the cover body falling channel 1323, and the cover body buffer units 134 are arranged opposite to each other and spaced apart to form a cover body buffer space 1343 located therebetween, and the cover body buffer space is aligned with the cover body buffer units 134; the cover body buffer unit 134 includes:

[0067] A cache body 1341, which is rotatably connected to the cover screw-in assembly 13;

[0068] A cache recovery component, which elastically acts between the cache body 1341 and the cover screw-in assembly 13;

[0069] A cache upper limit portion 1344 extending horizontally outward from the top inner side of the cache body 1341; and

[0070] A cache lower limit portion 1342 extending horizontally outward from the bottom outer side of the cache body 1341;

[0071] Among them, the cache upper limit portion 1344 and the cache lower limit portion 1342 are arranged relatively to each other in the upper and lower parts to limit the top and the top of the cover body cache space respectively; the cover body cache unit 134 can rotate relative to the cover body screw-in assembly 13 to switch between the cache state and the release state, and the cache upper limit portion 1344 and the cache lower limit portion 1342 protrude from the inner wall of the cover body falling channel 1323; the cache recovery component elastically acts between the cache body 1341 and the cover body screw-in assembly 13, so that after the cover body cache unit 134 releases the cached cover 14 in the release state, the cache recovery component can reset the cover body cache unit 134 to the cache state.

[0072] Refer again Figure 1 and Figure 3 The bottom of the cover screw-in assembly 13 is provided with a screw-cover structure located directly below the cover cache unit 134, and the screw-cover structure includes:

[0073] A cover screw channel 137, which is aligned with the cover body buffer space;

[0074] A cover retaining ring 135, which is disposed around the bottom of the cover screwing channel 137 and is fixedly connected to the cover screwing assembly 13; and

[0075] At least three cover retaining members 136 are embedded in the side wall of the cover retaining ring 135.

[0076] Among them, a clamping reset component is elastically supported between the cover body retaining component 136 and the cover body retaining ring 135. When the cover body retaining component 136 is in the initial state, its end protrudes from the side wall of the cover body retaining ring 135. When the end of the cover body retaining component 136 is compressed, it is completely immersed in the side wall of the cover body retaining ring 135. The diameter of the screw cover channel 137 is consistent with the outer peripheral diameter of the cover body 14.

[0077] After the cover body cache unit 134 releases the cached cover body 14 in the release state, the cover body 14 falls into the capping channel 137, and the cover body 14 can be temporarily stored in the capping channel 137 under the limit of the cover body holding component 136. When the mouth of the medicine bottle to be capped intrudes into the capping channel 137 from the bottom of the capping channel 137, at least the mouth of the medicine bottle is inserted into the cover body 14, and at this time, the filling tube 112 is driven to rotate and drive the mouth of the medicine bottle to further intrude. The capping channel 137 can smoothly screw the cap onto the mouth of the medicine bottle. After the screwing operation is completed, the cap leaves the bottom of the capping channel 137 along with the medicine bottle, thereby turning the capping channel 137 into an empty state. During the capping process, the medicine bottle can also provide an upward holding force to the cap screwing assembly 13, so that the cap screwing assembly 13 can slide upward in the vertical direction to switch from the away state to the approaching state. In the approaching state, the filling tube 1 The cover 12 is inserted into the downward-pressing docking channel and acts on the cover 14 at the top of the cover stack, so that the cover stack moves downward as a whole and finally makes the cover 14 at the bottom of the cover stack leave the cover falling channel 1323. After leaving the cover falling channel 1323, the cover 14 at the bottom pushes the cover buffer unit 134 to rotate and pushes the cover 14 cached by the cover buffer unit 134 into the vacant cover screwing channel 137 to prepare for cover screwing, and the cover 14 at the bottom is cached in the cover buffer space. Then, when the cover body is screwed into the assembly 13 and gradually returns to the separation state under the action of the elastic reset component 123, the vacuum generator begins to evacuate the downward-pressing docking channel, and the cover body 14 at the bottom of the filling channel 1121 begins to laterally compress the bending section 1152 under the action of the suction force and finally makes the lateral compressing force greater than the restoring force of the elastic support component 1153, thereby causing the cover body 14 to slip off the filling channel 1121 and fall into the downward-pressing docking channel.

[0078] exist Figure 1 In the illustrated embodiment, a plurality of longitudinally arranged elastic retaining units 1371 are formed on the inner side wall of the capping channel 137, so that the friction force on the cover body 14 can be increased during the capping process, thereby improving the capping success rate and efficiency.

[0079] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0080] The components of the various embodiments described herein may be combined to form other embodiments not specifically stated above. Components may be excluded from the structures described herein without adversely affecting their operation. In addition, various individual components may be combined into one or more individual components to perform the functions described herein.

[0081] In addition, although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A capping mechanism for a medicine filling machine, characterized in that: include: A filling tube having a butt joint formed at its bottom end; A cover screw-in assembly disposed directly below the filling tube, wherein a cover falling channel is formed therein and runs through from the top to the bottom thereof; as well as A posture maintaining assembly, comprising an elastic reset component and a maintaining sleeve fixedly sleeved on the docking portion, wherein the interior of the maintaining sleeve is hollow and open at the bottom to form a docking port, and at least a portion of the docking portion is inserted from the top of the maintaining sleeve and extends into the interior of the maintaining sleeve; The top end of the cover screw-in assembly is inserted into the interior of the maintenance sleeve from the docking port, and the cover falling channel is aligned with the docking portion; the cover screw-in assembly can slide relative to the maintenance sleeve in the vertical direction to switch between the approaching state and the distant state; the elastic reset component acts between the maintenance sleeve and the cover screw-in assembly; the elastic reset component can be elastically deformed, and when the vertical upward holding force on the cover screw-in assembly is less than the elastic restoring force of the elastic reset component, the cover screw-in assembly can slide downward in the vertical direction to reset from the approaching state to the distant state; It also includes a fixed mounting seat, in which the loading tube is rotatably mounted so that the docking portion is exposed from the bottom of the mounting seat; The filling tube is provided with a filling channel running through the upper and lower ends thereof, and the cover body is loaded from the top of the filling channel and slides out from the bottom and finally falls into the cover body falling channel, so that a plurality of cover bodies are sequentially stacked in the cover body falling channel to form a cover body pile, wherein at least one cover body is temporarily stored in the docking portion of the filling tube; when the cover body screw-in assembly is in the approaching state, the filling tube is inserted into the cover body falling channel and acts on the cover body at the top of the cover body pile so that the cover body pile moves downward as a whole and finally causes the cover body at the bottom of the cover body pile to leave the cover body falling channel; At least three groups of cover holding structures are arranged around the filling channel near the bottom of the filling channel, and the cover holding structures include: a straight line segment, which is embedded in the inner wall of the filling tube and is rotatably connected to the filling tube; A bent section, which is fixed to the bottom of the straight section and has an inclination angle α extending obliquely outward, so that the bottom diameter of the filling channel is gradually reduced from top to bottom; and an elastic supporting member elastically supported between the bending section and the inner side wall of the filling tube; Among them, the straight section can rotate relative to the loading tube so that the cover body holding structure can switch between a holding state and a release state; the elastic support component can undergo elastic deformation, and when the lateral pressure from the cover body to the bent section is greater than the elastic restoring force of the elastic support component, the straight section can rotate relative to the loading tube to restore from the holding state to the release state.

2. The capping mechanism of the medicine filling machine according to claim 1, characterized in that: A downward pressing docking channel is formed at the top end of the cover body falling channel, and the downward pressing docking channel includes a straight matching section and an inclined guiding section which are sequentially connected from top to bottom, wherein the inner diameter of the straight matching section is greater than or equal to the outer diameter of the filling tube, and the inner diameter of the inclined guiding section is gradually reduced from top to bottom to make a size transition between the straight matching section and the cover body falling channel.

3. The capping mechanism of the medicine filling machine according to claim 2, characterized in that: A sealing ring is provided on the outer side of the bottom of the filling tube. When the filling tube is inserted into the downward-pressed docking channel, the sealing ring forms a seal between the filling tube and the straight-line docking section.

4. The capping mechanism of the medicine filling machine according to claim 3, characterized in that: It also includes a vacuum generator, and the air extraction pipeline of the vacuum generator is connected to the downward pressure docking channel.

5. The capping mechanism of the medicine filling machine according to claim 4, characterized in that: When the cover body screw-in assembly is in the approaching state, the filling tube is inserted into the downward-pressing docking channel and acts on the cover body at the top of the cover body stack, so that the cover body stack moves downward as a whole and finally makes the cover body at the bottom of the cover body stack leave the cover body falling channel, and then when the cover body screw-in assembly gradually recovers to the leaving state under the action of the elastic reset component, the vacuum generator starts to vacuum the downward-pressing docking channel, and the cover body at the bottom of the filling channel starts to laterally compress the bending section under the action of the suction force and finally makes the lateral compressing force greater than the restoring force of the elastic support component, so that the cover body slides off the filling channel and falls into the downward-pressing docking channel.

6. The capping mechanism of the medicine filling machine according to claim 1, characterized in that: At least two cover body buffer units are arranged around the bottom exit of the cover body falling channel, and the cover body buffer units are arranged opposite to each other and spaced apart to form a cover body buffer space between the two, and the cover body buffer space is aligned with the cover body buffer units; The cover body buffer unit comprises: A cache body, which is rotatably connected to the cover body screw-in assembly; A cache recovery component, which elastically acts between the cache body and the cover screw-in assembly; A cache upper limit portion extending horizontally outward from the top inner side of the cache body; and A cache lower limit portion, which extends horizontally outward from the outer side of the bottom of the cache body; Among them, the cache upper limit part and the cache lower limit part are arranged relatively to each other in the upper and lower parts to limit the top and the top of the cover body cache space respectively; the cover body cache unit can rotate relative to the cover body screw-in assembly to switch between a cache state and a release state, and the cache upper limit part and the cache lower limit part protrude from the inner wall of the cover body falling channel; the cache recovery component elastically acts between the cache body and the cover body screw-in assembly, so that after the cover body cache unit releases the cached cover in the release state, the cache recovery component can reset the cover body cache unit to the cache state.

7. The capping mechanism of the medicine filling machine according to claim 6, characterized in that: The bottom of the cover screw-in assembly is provided with a screw-cover structure located directly below the cover cache unit, and the screw-cover structure includes: A cover screwing channel, which is aligned with the cover body buffer space; A cover retaining ring, which is disposed around the bottom of the cover screwing channel and is fixedly connected to the cover screwing assembly; and At least three cover retaining members are embedded in the side wall of the cover retaining ring. Among them, a clamping reset component is elastically supported between the cover retaining component and the cover retaining ring. When the cover retaining component is in an initial state, its end protrudes from the side wall of the cover retaining ring. When the end of the cover retaining component is compressed, it is completely immersed in the side wall of the cover retaining ring. The diameter of the screw cap channel is consistent with the outer peripheral diameter of the cover.

Images