Article first-in-first-out advancing device

Abstract

The application discloses an advanced goods first-out advancing device, which comprises an advancing main body, the advancing main body comprises a sliding rail and a pushing head arranged on the sliding rail and driven by a driving mechanism, and a positioning module is connected to the pushing head; the positioning module comprises a movable block which can move towards the sliding rail and is locked and released when moving to a limit position; a rotating wheel is arranged between the movable block and the sliding rail on the movable block, the opposite surfaces of the rotating wheel and the movable block are both planes, and a positioning block is further arranged on the outer edge of the rotating wheel and corresponds to one side of the plane of the rotating wheel; and correspondingly, a positioning clamping convex is arranged on the sliding rail. The application can standardize the behavior of replenishment personnel and solve the problem that old goods are pushed to the innermost part of the goods channel, thereby causing loss and food safety accidents.

Description

TECHNICAL FIELD

[0001] The present application relates to an article advancing device, in particular to an article first-in-first-out advancing device. BACKGROUND

[0002] The conventional article advancer scheme cannot achieve the true sense of "first-in-first-out" function, that is, the goods of the first batch put into the goods channel are taken out first, and the goods of the later batch supplemented into the goods channel are taken out slowly. Because the working principle of the article advancer is that the torsion of the spring in the push head after being stretched will push forward after the goods are taken, thereby realizing the function of automatic goods arrangement. In the application scenarios of front-supplementing shelves, shelves, refrigerators and the like, when the goods in the goods channel are left with a few, the replenishment personnel usually do not consciously take the remaining goods placed in the goods channel first, then put the newly supplemented goods, and finally put the remaining goods back to the front of the newly supplemented goods in the goods channel, but directly supplement the goods channel to push the remaining goods to the rear of the newly supplemented goods. Such operation mode has a high probability to cause the goods to expire, resulting in direct loss of retail stores, and if the merchant does not check whether the goods expire in time, it will also cause safety problems of the goods.

[0003] In the prior art, there is a "first-in-first-out article device" of CN 213801413 U, a specific embodiment of the device includes: a U-shaped goods channel includes a goods-in channel, a rotating channel and a goods-out channel connected in sequence; a baffle is arranged in the middle of the U-shaped goods channel to separate the goods-in channel and the goods-out channel; a rotating assembly is arranged in the rotating channel to make the product turn from the goods-in channel to the goods-out channel; in the working state, the product enters from the goods-in channel and turns to the goods-out channel through the rotating assembly. The embodiment can make the product entering the goods-in channel turn to the goods-out channel under the action of the rotating assembly, thereby realizing that the products put in first can be taken out from the goods-out channel preferentially.

[0004] In addition, there is a "rotary shelf" of CN 209331593 U, which includes a support, a rotating frame movably connected to the support, and at least two trays arranged on the rotating frame. Further, the support includes a plurality of horizontal beams and a plurality of vertical columns which are detachable; the support and the rotating frame are detachably connected. The trays are distributed around the rotating shaft of the rotating frame, and a plurality of goods are displayed around the rotating shaft of the rotating frame. The shelf displays at least one more type of goods than the traditional shelf. After the rotating frame rotates by a certain angle, the image of the rotating frame viewed from the front is changed, the goods to be displayed on the rotating frame from the front are switched, the function of conveniently switching the goods in large capacity is realized, the goods can be repeatedly switched, the operation is simple, and the specific display requirements of customers are met.

[0005] It can be known that the U-shaped goods channel scheme and the rotating shelf scheme in the prior art change the "front replenishment" scene into "rear replenishment", so as to realize the "first-in first-out" function, but these schemes will occupy the effective space of the shelf or refrigerator due to the change of product structure, thereby reducing the efficiency of the retail store, and increasing the operation difficulty and time of the supermarket stocker; in addition, because the corresponding size or other requirements are different in different application scenes, it is particularly important to propose a standardized solution. SUMMARY

[0006] The technical problem to be solved by the present application is to provide an article first-in first-out advancing device, which does not need to change the size or structure of the shelf, and achieves the "first-in first-out" delivery purpose by controllably limiting the retreat of the advancing device and standardizing human behavior.

[0007] To solve the above technical problems, the present application adopts the following technical scheme:

[0008] An article first-in first-out advancing device, comprising an advancing main body, the advancing main body comprising a sliding rail and a push head provided on the sliding rail and provided with a power mechanism, the power mechanism can be an electric mechanism for driving the push head to advance or a clockwork provided in the push head, and the power mechanism does not affect the realization of the "first-in first-out" purpose of the present application. A positioning module is connected to the push head, the positioning module comprising a movable block which can move towards the sliding rail and is locked by a locking mechanism when moving to a limit position and is released by a releasing mechanism; a positioning stopper is provided between the movable block and the sliding rail on the movable block, and a positioning clamping protrusion for realizing the stop-retreating function is provided on the sliding rail corresponding to the positioning stopper.

[0009] The positioning stopper is movably connected to the movable block by itself or a third structural member, so that the positioning stopper can only rotate to one side of the push head retreat direction relative to the movable block. In principle, the positioning stopper only needs to be movably connected to the movable block and can only rotate to one side of the push head retreat direction, so as to realize the purpose of stopping retreat without affecting the advancing.

[0010] The limit position of the movable block is a position where the movable block approaches the sliding rail as much as possible, at which time the positioning stopper on the movable block can contact the positioning clamping protrusion of the sliding rail, and the positioning stopper can only rotate to one side of the push head retreat direction relative to the movable block, that is, the positioning stopper does not rotate when the push head retreats, and cooperates with the blocking of the positioning clamping protrusion to realize the purpose that the stop-retreating module cannot retreat, thereby achieving the push head stop-retreating effect.

[0011] Alternatively, the positioning stopper is hinged to one side of the push head retreat direction of the movable block by itself, so that the positioning stopper can only rotate to one side of the push head retreat direction relative to the movable block.

[0012] The positioning block can be connected to the movable block by a third structural member to achieve the purpose of rotating only to one side of the push head retraction direction relative to the movable block, the third structural member can be a rotating wheel, the rotating wheel is arranged at one end of the movable block and between the movable block and the slide rail, the positioning block is arranged at the outer edge of the rotating wheel close to the slide rail; the opposite surfaces between the rotating wheel and the movable block are adjacent to each other and are each a plane, and the side of the rotating wheel plane in the push head retraction direction is an arc surface.

[0013] Therefore, when the movable block reaches the limit position and is locked, at this time, the positioning block is close to the slide rail, the positioning block cannot rotate forward due to being arranged at the rear side of the movable block, or the rotating wheel cannot rotate in the push head retraction direction due to the limitation of the plane between the rotating wheel and the movable block, so that the blocking effect of the positioning block on the push head retraction is ensured. Because the side of the rotating wheel plane in the push head retraction direction is an arc surface, when the push head advances, even if the movable block is locked, the rotation of the rotating wheel in the push head advancing direction will not be hindered, so that the smoothness of the push head advancing is ensured.

[0014] In the present application, the positioning module further comprises a shell, and the movable block moves in the shell;

[0015] The locking mechanism comprises a first clamping table arranged on the movable block and a second clamping table arranged on the shell, and the first clamping table enters the clamping position of the second clamping table to achieve clamping when the movable block is at the limit position;

[0016] The releasing mechanism comprises a pressing column arranged on the movable block and a slot arranged on the shell for the pressing column to pass through, and the first clamping table and the second clamping table are dislocated and separated after the pressing column is pushed to release the locked state, so that the movable block is released.

[0017] Further, the movable block is provided with an elastic column, and the first clamping table and the pressing column are arranged on the elastic column to provide the deformation amount required for locking and releasing the movable block.

[0018] Working principle: when the movable block is pressed to lock, the positioning module cannot retreat due to the cooperation of the positioning stopper and the positioning card convex, so the push head can only move forward, and therefore the goods in the goods channel can only be pushed forward by the power mechanism of the push head after the goods are taken out. When replenishing goods, new goods cannot be directly filled in the goods channel with old goods in the goods channel. Therefore, the replenishment personnel must first take out the remaining old goods on the goods shelf. When the push head drives the positioning module to the front end of the goods channel, the person manually releases the movable block to remove the effect of the positioning stopper on the positioning card convex. At this time, the push head in the goods channel will not be hindered when it retreats. Therefore, when replenishing goods, the replenishment personnel can first replenish new goods in the goods channel, and then put the initially taken out old goods back into the goods channel. Starting from the structural improvement, the behavior of the replenishment personnel is standardized, and the purpose of "first in first out" is ultimately achieved. For the case where the space is sufficient or the back of the goods shelf is not blocked, the movable block is manually pressed until it is locked when the push head is pushed to the end of the goods channel, so that the push head enters the "retreat stopping" state again, and the cycle is repeated.

[0019] However, in some application scenarios such as side-by-side shelves, the operation space is insufficient for the operator to press the movable block into the goods channel to make the positioning module enter the "retreat stopping" state, or the back of the goods shelf is close to the wall and cannot press the movable block from the back to make the positioning module enter the "retreat stopping" state. Therefore, after the goods in the goods channel are replenished, the push head is pushed to the end of the goods channel. At this time, the positioning module needs to start the "retreat stopping" function, which requires additional structure to achieve. As a preferred technical solution, a pressing switch is formed on the end of the movable block away from the slide rail and protrudes out of the shell. A top block is arranged at the top of the end of the slide rail (the deepest part of the goods channel) to cooperate with the pressing switch. The contact surface of the top block and the pressing switch is a slope or an arc surface, so that when the push head retreats to the top block, the top block will push the pressing switch until the movable block enters the locked state, thereby starting the "retreat stopping" function of the positioning module. Preferably, the contact surface of the pressing switch and the top block is also a slope or an arc surface, so that the pressing switch and the top block can work better together. The overall shape or structure of the top block and the pressing switch is not limited.

[0020] Further, a reset spring is arranged in the shell, and the two ends of the reset spring are connected to the movable block and the shell, respectively. In the natural contraction state, the movable block is away from the slide rail, and when the movable block is pressed to the locked state, the reset spring is elongated to provide the force required for the reset of the movable block.

[0021] Further, in order to ensure the smoothness of the movable block, a guide structure is arranged on the inner wall of the shell to guide the movable block. The guide structure can be two rows of four guide columns arranged on the inner wall of the shell, and the movable block moves between the two rows of guide columns. The four guide columns can be matched with connecting screws to fix the shell cover. The movable block moves smoothly under the restriction of the four guide columns.

[0022] Further, in order to improve the adaptability between the positioning module and different push heads, and to facilitate installation, the positioning module and the push head are fixed by screws.

[0023] Further, the outer edge of the rotating wheel on one side in the retreat direction of the push head is also provided with an anti-overturning stop block. Preferably, the included angle between the anti-overturning stop block and the positioning stop block is a right angle. When the push head slides forward, the rotating wheel rotates in the forward direction of the push head when the positioning stop block passes through the positioning clamping convex, and the anti-overturning stop block can be blocked by the movable block when the rotating wheel rotates to a certain angle, thereby preventing the rotating wheel from rotating too much to cause the height of the positioning stop block to exceed the positioning clamping convex, thereby causing the problem of stop failure. In addition, a torsional spring is arranged on the rotating wheel, and the torsional spring keeps the positioning stop block facing the slide rail in a natural state. After the push head advances and the rotating wheel rotates, the torsional spring provides a restoring force to restore the rotating wheel to the natural state.

[0024] In practical application, the movement direction of the movable block of the present application needs to be determined according to the direction of the slide rail. When the slide rail is at the bottom or top of the push head, the movement direction of the movable block is up and down. When the slide rail is at the side of the push head, the movement direction of the movable block is left and right. Correspondingly, different slide rail positions cause the setting position of the positioning clamping convex to change accordingly, and the structure of the positioning clamping convex is preferably a straight triangle, which can also be a rectangle or other shapes. The positioning clamping convexes are arranged relatively on the slide rail, and the specific position and the specific number of the positioning clamping convexes arranged on the slide rail are set according to the application scenario.

[0025] Compared with the prior art, the present application has the following beneficial effects:

[0026] When the movable block of the positioning module is pressed to the locked state, the push head of the present application cannot always retreat on the slide rail, and will be blocked when it retreats to the position of the positioning clamping convex, thereby preventing the replenishment personnel from directly adding new goods in the goods channel when replenishing, standardizing the behavior of the replenishment personnel, i.e. first removing the old goods from the goods channel to make the push head advance to the front of the goods channel under the action of the power mechanism, then manually pressing the pressing column to release the movable block, and then the positioning stop plate moves away from the slide rail with the movable block, and the push head restores the free retreat function. At this time, the replenishment personnel can replenish new goods in the goods channel, and finally the initially removed old goods are replenished into the goods channel, so as to achieve the purpose of "first in first out", and solve the risk of expired goods caused by directly pushing the old goods to the end of the goods channel during replenishment. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Elevation of the positioning module of Example 1 Figure 1 ;

[0028] Figure 2 Elevation of the positioning module of Example 1 Figure 2 ;

[0029] Figure 3 Disassembly of the positioning module of Example 1 Figure 1 ;

[0030] Figure 4 Disassembly of the positioning module of Example 1 Figure 2 ;

[0031] Figure 5 Installation diagram of the positioning module of Example 1 in the housing

[0032] Figure 6 Structural diagram of the rotating wheel of Example 1

[0033] Figure 7 Installation diagram of the positioning module of Example 1 Figure 1 ;

[0034] Figure 8 Installation diagram of the positioning module of Example 1 Figure 2 ;

[0035] Figure 9 Disassembly diagram of the propulsion device of Example 1

[0036] Figure 10 Diagram of the state of the push head of the commodity after the commodity channel is replenished with commodities, in which the push head retreats to contact the pressing switch and the top block in Example 1

[0037] Figure 11 Diagram of the state of the push head of the commodity after the commodity is taken away, in which the push head is pushed forward under the action of the power mechanism in Example 1

[0038] Figure 12 Connection diagram of the movable block and the positioning block of Example 2

[0039] Figure 13 Cooperation diagram of the positioning block and the positioning clamping convex of Example 2

[0040] In the diagram: 1-Slide rail; 2-Push head; 3-Current spring; 4-Positioning module; 41-Moving block; 410-Elastic column; 411-Pressing column; 412-First locking platform; 42-Rotating wheel; 43-Rotating wheel plane; 44-Positioning stop; 45-Housing shell; 450-Housing cover; 451-Slot; 452-Second locking platform; 453-Guide column; 46-Press switch; 47-Anti-over-rotation stop; 5-Positioning cam; 6-Product; 7-Arc-shaped contact plate; 8-Top block; 9-Reset spring; 10-Torsion spring. Detailed Implementation

[0041] To enable those skilled in the art to understand the present invention more clearly and intuitively, the present invention will be further described below with reference to the accompanying drawings.

[0042] Example 1

[0043] like Figures 1-11 The illustrated first-in-first-out (FIFO) propulsion device includes a propulsion body, which comprises a slide rail 1 and a pusher head 2 mounted on the slide rail 1 and equipped with a power mechanism. In this embodiment, the power mechanism is preferably a spring 3 housed within the pusher head 2. A positioning module 4 is connected to the pusher head 2. The positioning module 4 includes a housing 45 and a movable block 41 housed within the housing 45. The movable block 41 is movable downwards along the slide rail 1 within the housing 45. The movable block 41 has an elastic post 410, which in turn has a pressing post 411 and a first locking platform 412. The housing 45 has a groove 451 through which the pressing post 411 passes and a second locking platform 452 that engages with the first locking platform 412. The locking of the movable block 41 within the housing 45 is achieved through the engagement between the first locking platform 412 and the second locking platform 452. The release of the movable block 41 is achieved by pushing the pressing post 411, forcing the first locking platform 412 on the movable block 41 to displace and separate from the second locking platform 452 on the housing 45.

[0044] A rotating wheel 42 is provided on the movable block 41 between the movable block 41 and the slide rail 1. The surfaces of the rotating wheel 42 and the movable block 41 are adjacent to each other and are planes. The side of the rotating wheel plane 43 with the push head 2 moving backward is an arc surface A. A positioning block 44 is also provided on the outer edge of the rotating wheel 42 near the slide rail 1. Correspondingly, a positioning bracket 5 is provided on the slide rail 1.

[0045] Under the action of external force, the movable block 41 is pushed to the maximum position of the slide rail 1 and is locked when the first clamping table 412 enters the clamping position of the second clamping table 452, at this time the positioning block 44 driven by the rotating wheel 42 is close to the slide rail 1, and the opposite surfaces of the rotating wheel 42 and the movable block 41 are each a plane, the side of the push head 2 in the backward direction of the rotating wheel plane 43 is an arc surface A, then the rotating wheel 42 is limited to roll backward, so that the positioning block 44 can be blocked by the positioning clamping convex 5 to realize the positioning of the push head 2, and the push head 2 enters the "retreat stopping" state, so as to prevent the replenishment staff from directly replenishing goods in the goods channel to push the old goods 6 to the last of the goods channel; therefore, the device can standardize the behavior of the replenishment staff, that is, the replenishment staff cannot not take down the remaining goods 6 in the goods channel when replenishing goods, press the pressing column 411 to release the movable block 41 in the positioning module 4, and release the action relationship of the positioning block 44 on the rotating wheel 42 on the positioning clamping convex 5, at this time the goods channel can be replenished without any obstruction, the push head 2 advances inward on the slide rail 1 along with the replenishment of the goods 6, and the old goods can be replenished at the last of the goods channel, so that the old goods 6 can be taken off in front of the goods channel when the customer purchases, so as to ensure that the goods 6 will not easily expire. In the embodiment, the goods 6 in the goods channel are filled heads, and in order to facilitate the advancement of the goods 6, the front end of the push head is provided with an arc-shaped contact plate 7.

[0046] For the case that the goods channel space is sufficient or the back of the goods shelf is not blocked, the movable block 41 in the positioning module 4 can be directly manually pressed towards the movable block 41 until it is locked when the push head 2 is pushed to the last, so that the push head 2 enters the "retreat stopping" state again, and the cycle is repeated.

[0047] For the case that the operation space is insufficient for the hand of the replenishment staff to reach into the goods channel, after the goods channel is replenished, the push head 2 is pushed to the last of the goods channel, at this time the positioning module 4 needs additional structure to start the "retreat stopping" function. Therefore, for some application scenarios including this, the solution of the embodiment is that a pressing switch 46 is formed outside the housing 45 away from the slide rail 1 on the movable block 41, and a top block 8 is arranged at the end of the slide rail 1 (the last of the goods channel), the top block 8 has an inclined surface or an arc surface, so that when the goods 6 being continuously replenished push the push head 2 to retreat to the top block 8, the top block 8 presses the pressing switch 46 to the locking state of the movable block 41, instead of manually pressing the movable block 41 by the operator to start the "retreat stopping" function of the positioning module 4. Preferably, the pressing switch 46 is also provided with an inclined surface or an arc surface, so that the pressing switch 46 and the top block 8 can work better.

[0048] In order to make the movable block 41 be released automatically reset, the shell 45 is also provided with a reset spring 9, both ends of the reset spring 9 are connected on the movable block 41 and the shell 45, the reset spring 9 is in the natural state of contraction, the movable block 41 is away from the slide rail 1, and when the movable block 41 is pressed to the locked state, the reset spring 9 is lengthened to provide the force required for the reset of the movable block 41 after being released.

[0049] In order to ensure the smoothness of the sliding of the movable block 41, the inner wall of the shell 45 is also provided with a guide structure for the movable block 41. The guide structure can be two rows of four guide columns 453 provided on the inner wall of the shell 45, and the movable block 41 moves between the two rows of guide columns 453. The four guide columns 453 can be matched with the connecting screws to fix the shell cover 450 of the shell 45. The movable block 41 realizes the smoothness of the movement under the restriction of the four guide columns 453.

[0050] In order to improve the adaptability between the positioning module 4 and different push heads 2, and also to facilitate the installation, the positioning module 4 and the push head 2 are fixed by screws.

[0051] Further, the rotating wheel 2 is also provided with an anti-overturning stop block 47 at the rear retreat direction of the push head 2, and the included angle between the anti-overturning stop block 47 and the positioning stop block 44 is a right angle. When the rotating wheel 42 passes through the positioning lug 5 forwardly, the rotating wheel 42 will rotate, and the anti-overturning stop block 47 provided can be blocked by the movable block 41 to prevent the rotating wheel 42 from rotating too much to cause the height of the positioning stop block 44 to exceed the positioning lug 5, thereby causing the problem of the failure of the retreat / positioning. The rotating wheel 2 is sleeved with a torsional spring 10, which maintains the positioning stop block 44 facing the slide rail 1 in the natural state, and provides a restoring force for the rotating wheel 2 to return to the natural state after rotating.

[0052] Embodiment 2

[0053] The difference between this embodiment and embodiment 1 is that the positioning stop block 44 is arranged differently. Specifically, referring to Figure 12 and Figure 13 , the positioning stop block 44 is hinged to the rear side of the movable block 41. When the movable block 41 is pressed to the slide rail 1 and locked, the push head 2 is pushed forward, and the positioning module 4 moves forward with the push head 2. When the positioning stop block 44 passes through the positioning lug 5, the positioning stop block 44 can rotate in the retreat direction of the push head 2, so the positioning stop block 44 will not be blocked by the positioning lug 5. When the push head 2 retreats with the positioning module 4, the rotation of the positioning stop block 44 in the forward direction of the push head 2 is blocked by the movable block 41, so the positioning stop block 44 will be blocked by the positioning lug 5 at the position of the positioning lug 5 and cannot continue to retreat. At this time, only when the locking of the movable block 41 is released, the retreat of the push head 2 can be realized again.

[0054] The above merely preferred embodiments of the present application are not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A first-in-first-out (FIFO) propulsion device for articles, comprising a propulsion body, said propulsion body including a slide rail (1) and a pusher (2) placed on the slide rail (1) and equipped with a power mechanism, characterized in that, A positioning module (4) is connected to the pusher (2), which includes a movable block (41) that can move toward the slide rail (1) and can be locked by a locking mechanism when it moves to the limit position and released by a release mechanism; The positioning module (4) also includes a housing (45), a movable block (41) located inside the housing (45) and movable within the housing (45); a push switch (46) is formed by one end of the movable block (41) that protrudes from the housing (45) away from the slide rail (1), and a top block (8) is provided at the end of the slide rail (1); The movable block (41) is provided with a positioning block (44) between the movable block (41) and the slide rail (1). Correspondingly, the slide rail (1) is provided with a positioning card protrusion (5) that cooperates with the positioning block (44) to achieve the function of stopping the backward movement. The positioning block (44) is rotatably connected to the movable block (41), and the positioning block (44) can only rotate relative to the movable block (41) in the direction of the push head (2) moving backward; The positioning block (44) is rotatably connected to the movable block (41) via a rotating wheel (42). The rotating wheel (42) is located between the movable block (41) and the slide rail (1). The positioning block (44) is located on the side of the outer edge of the rotating wheel (42) near the slide rail (1).

2. The first-in-first-out (FIFO) propulsion device for articles according to claim 1, characterized in that, The positioning block (44) is hinged to the push head (2) on the movable block (41) in the backward direction, so that the positioning block (44) can only rotate relative to the movable block (41) in the backward direction of the push head (2).

3. The first-in-first-out (FIFO) propulsion device for articles according to claim 1, characterized in that, The surfaces opposite to the rotating wheel (42) and the movable block (41) are flat, and the side of the rotating wheel plane (43) in the direction of the push head (2) moving backward is an arc surface.

4. The first-in-first-out (FIFO) propulsion device for articles according to claim 1, characterized in that, The power mechanism is an electric mechanism that drives the pusher (2) forward or a spring (3) located inside the pusher (2).

5. The first-in-first-out (FIFO) propulsion device for articles according to claim 1, characterized in that, The locking mechanism includes a first locking platform (412) on the movable block (41) and a second locking platform (452) on the housing (45). When the movable block (41) is in the extreme position, the first locking platform (412) enters the locking position of the second locking platform (452) to achieve locking. The release mechanism includes a pressing post (411) on the movable block (41) and a groove (451) on the housing (45) through which the pressing post (411) passes. Pushing the pressing post (411) causes the first locking plate (412) and the second locking plate (452) to be misaligned and separated, thereby releasing the movable block (41).

6. The first-in-first-out (FIFO) propulsion device for articles according to claim 5, characterized in that, The movable block (41) is provided with an elastic post (410), and the first locking plate (412) and the pressing post (411) are both provided on the elastic post (410) to provide the deformation required for locking and releasing the movable block (41).

7. The first-in-first-out (FIFO) propulsion device for articles according to claim 5, characterized in that, The contact surface between the top block (8) and the push switch (46) is a slope or an arc surface; The contact surface between the push switch (46) and the top block (8) is an inclined surface or an arc surface.

8. The first-in-first-out (FIFO) propulsion device for articles according to claim 5, characterized in that, The housing (45) is also provided with a return spring (9), the two ends of which are connected to the movable block (41) and the housing (45) respectively. When the return spring (9) is in a naturally contracted state, the movable block (41) is away from the slide rail (1).

9. The first-in-first-out (FIFO) propulsion device for articles according to claim 5, characterized in that, The inner wall of the housing (45) is also provided with a guide structure to guide the movement of the movable block (41).

10. The first-in-first-out (FIFO) propulsion device for articles according to claim 3, characterized in that, The outer edge of the wheel (42) is also provided with an anti-over-rotation stop (47) on the side located in the backward direction of the pusher (2); A torsion spring (10) is also fitted on the rotating wheel (42). In its natural state, the torsion spring (10) keeps the positioning block (44) facing the slide rail (1) and provides a restoring force for the rotating wheel (42) to return to its natural state after it rotates.

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