A conveyor line buffer device

Abstract

The present application discloses a conveyor line buffer device, including a spline placement rack, on which a plurality of stations for placing splines in parallel are arranged; a spline conveying mechanism, including a spline conveying plate and a push plate located above the spline conveying plate; the push plate is slidably connected to a slideway, and can move along the direction of the spline conveying plate under the drive of a driving device; a first lifting mechanism is used to lift the spline from a station above the spline placement rack to an adjacent station in the direction of the spline conveying mechanism; a second lifting mechanism is used to lift the spline from a station above the spline placement rack to an adjacent station in the direction of the spline conveying mechanism, or to lift the spline from the spline placement rack to the spline conveying mechanism. The present application realizes the transfer operation of the splines cached on the spline placement rack through a lifting mechanism composed of two groups of lifting cylinders and a push-pull cylinder, so that when the running speed difference between the two stations is large, the redundant splines can enter the next process in an orderly manner.

Description

Technical Field

[0001] The invention relates to the technical field of steel manufacturing process equipment, and in particular to a conveyor line buffer device. Background Art

[0002] At present, in most steel manufacturing industries, conveyor chains are used to transport steel strips between two distant workstations. For example, after the cut-to-length shears cut the steel plate into strips, robots are required to transfer the strips to the conveyor chain, which then transfers the strips to the next workstation for cutting and other operations.

[0003] However, since the conveyor chain adopts a linear transmission method, its transmission space is small, which will be greatly limited in specific applications. For example, the existing conveyor chain can usually only transport one spline at a time. If the splines cut by the cut-to-length shear are large in a short period of time, and the conveyor chain runs slowly, the robot must wait for the previous spline to completely move out of the station before placing the next spline. This will cause the robot to be unable to transfer the splines cut by the previous station in time, resulting in the accumulation of splines. If there is too much accumulation, it is easy to cause a production accident where the spline overturns; if the robot places the next spline on the conveyor chain in advance, it is easy to cause the spline to bend downward when passing through the connection between the conveyor chain and the next station during transportation, and there is a risk of being unable to pass or getting stuck. Summary of the invention

[0004] The present application provides a conveyor line buffer device to solve the problems in the prior art of spline stacking, spline failure or jamming caused by the transmission of splines between two distant workstations.

[0005] In a first aspect, the present application provides a conveyor line buffer device, comprising:

[0006] A spline placement rack; a plurality of stations for placing splines in parallel are arranged above the spline placement rack;

[0007] The spline conveying mechanism is located on one side of the spline placing rack and is arranged parallel to the placed splines;

[0008] A first lifting mechanism, located on both sides of the spline placement rack, is used to lift the spline from a station above the spline placement rack to move to an adjacent station in the direction of the spline conveying mechanism;

[0009] The second lifting mechanism is located on both sides of the spline placement rack and between the first lifting mechanism and the spline conveying mechanism, and is used to lift the spline from a workstation above the spline placement rack to an adjacent workstation in the direction of the spline conveying mechanism, or to lift the spline from the spline placement rack to the spline conveying mechanism.

[0010] In some embodiments, the spline conveying mechanism includes a spline conveying plate and a push plate located above the spline conveying plate; a slideway is provided on one side of the spline conveying plate, and a driving device is provided at one end of the slideway; the push plate is slidably connected to the slideway and can move along the direction of the spline conveying plate under the drive of the driving device;

[0011] In some embodiments, the first lifting mechanism comprises:

[0012] The first push-pull cylinder;

[0013] A first movable base is located at one side of the output end of the first push-pull cylinder and is connected to the output end of the first push-pull cylinder through a first connecting rod;

[0014] A first lifting cylinder is fixed on the first moving base; the output end of the first lifting cylinder is vertically arranged upward;

[0015] The first spline support plate is located above the first lifting cylinder and is fixedly connected to the output end of the first lifting cylinder; the upper end surface of the first spline support plate can be higher or lower than the horizontal plane of the spline placement rack under the drive of the first lifting cylinder.

[0016] A first roller is provided below the first movable base, and the first lifting mechanism further comprises:

[0017] The first track is laid along a direction perpendicular to the spline conveying mechanism; the first roller slides along the first track.

[0018] In some embodiments, the second lifting mechanism comprises:

[0019] The second push-pull cylinder;

[0020] A second movable base is located at one side of the output end of the second push-pull cylinder and is connected to the output end of the second push-pull cylinder through a second connecting rod;

[0021] A second lifting cylinder is fixed on the second movable base; the output end of the second lifting cylinder is vertically arranged upward;

[0022] The second spline support plate is located above the second lifting cylinder and fixedly connected to the output end of the second lifting cylinder; the upper end surface of the second spline support plate can be higher or lower than the horizontal plane of the spline placement rack under the drive of the second lifting cylinder.

[0023] A second roller is provided below the second movable base, and the second lifting mechanism further comprises:

[0024] The second track is laid along a direction perpendicular to the spline conveying mechanism; the second roller slides along the second track.

[0025] In some embodiments, the first track and the second track are both provided with two tracks, and the first track is staggered with the second track.

[0026] In some embodiments, a plurality of spline positioning blocks are detachably connected to one side of the spline conveying plate close to the spline placing rack; and the distance between the end face of the spline positioning block and the slideway is adjustable.

[0027] In some embodiments, the first lifting mechanism and the second lifting mechanism can at least simultaneously lift the splines located at two workstations.

[0028] In a second aspect, the present application provides a conveyor line buffer device, comprising:

[0029] A spline placement rack; a plurality of stations for placing splines in parallel are arranged above the spline placement rack;

[0030] The spline conveying mechanism is located on one side of the spline placing rack and is arranged parallel to the placed splines;

[0031] The first lifting mechanism is located on both sides of the spline placement rack, and is used to lift the spline from a station above the spline placement rack to an adjacent station in the direction of the spline conveying mechanism; or to lift the spline from the spline placement rack to the spline conveying mechanism.

[0032] In some embodiments, the spline conveying mechanism includes a spline conveying plate and a push plate located above the spline conveying plate; a slideway is provided on one side of the spline conveying plate, and a driving device is provided at one end of the slideway; the push plate is slidably connected to the slideway and can move along the direction of the spline conveying plate under the drive of the driving device;

[0033] In some embodiments, the first lifting mechanism comprises:

[0034] The first push-pull cylinder;

[0035] A first movable base is located at one side of the output end of the first push-pull cylinder and is connected to the output end of the first push-pull cylinder through a first connecting rod;

[0036] A first lifting cylinder is fixed on the first moving base; the output end of the first lifting cylinder is vertically arranged upward;

[0037] A first spline support plate is located above the first lifting cylinder and is fixedly connected to the output end of the first lifting cylinder; the upper end surface of the first spline support plate can be higher or lower than the horizontal plane of the spline placement rack under the drive of the first lifting cylinder;

[0038] A first roller is provided below the first movable base, and the first lifting mechanism further comprises:

[0039] The first track is laid along a direction perpendicular to the spline conveying mechanism; the first roller slides along the first track.

[0040] The present application realizes the transfer operation of the splines cached on the spline placement rack through a lifting mechanism composed of two groups of lifting cylinders and a push-pull cylinder, so that when the running speed difference between the two workstations is large, the excess splines can enter the next process in an orderly manner. In addition, the device provided by the present application can improve the stability of the spline transportation process and avoid the problem of poor spline pass rate caused by irregular placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 This is a schematic structural diagram of a conveyor line buffer device of the present application;

[0043] Figure 2 for Figure 1 a side view of the device shown;

[0044] Figure 3 This is a partial structural diagram of a first lifting mechanism in a conveyor line buffer device of the present application;

[0045] Figure 4 This is a partial structural diagram of a second lifting mechanism in a conveyor line buffer device of the present application;

[0046] Figure 5 A schematic diagram of a spline conveying mechanism in a conveyor line buffer device of the present application under an embodiment;

[0047] Figure 6 It is a schematic diagram of the working process of the first lifting mechanism;

[0048] Figure 7 This is a schematic diagram of the working process when the number of splines is the maximum accommodating value. DETAILED DESCRIPTION

[0049] Embodiment 1

[0050] See also Figure 1 , is a structural schematic diagram of a conveyor line buffer device of the present application;

[0051] Depend on Figure 1 It can be seen that a conveyor line buffer device provided in an embodiment of the present application includes:

[0052] The spline rack 1 is used to place the cached steel splines 100 (hereinafter referred to as splines). The spline rack 1 can be designed as a frame structure in various forms, for example, it is formed by welding or screwing angle steel. A plurality of stations for placing the splines in parallel are arranged above the spline rack 1, such as Figure 1 As shown, when the splines are placed on the spline placement rack 1, they are placed in parallel and side by side. A plurality of workstations can be arranged adjacent to each other inwardly along the placement direction, and the number of workstations is equal to the maximum number of splines that can be placed on the spline placement rack 1.

[0053] The spline conveying mechanism is located on one side of the spline placement rack 1 and is arranged parallel to the placed splines, and is used to transport the splines cached on the spline placement rack 1 to the next workstation. In a feasible embodiment, it includes a spline conveying plate 4 and a push plate 5 located above the spline conveying plate 4; a slideway 41 is provided on one side of the spline conveying plate 4, and a driving device 42 is provided at one end of the slideway 41, and the driving device 42 can be driven by a motor or other equipment; the push plate 5 is slidably connected to the slideway 41, and can move along the direction of the spline conveying plate 4 under the drive of the driving device 42; the specific working process is that when the spline is transferred to the spline conveying plate 4, the driving device 42 is turned on, so that the driving push plate 5 located at one end can move to the other end, driving the spline to move out of the spline conveying plate 4.

[0054] A first lifting mechanism 2, located on both sides of the spline placement rack 1, is used to lift the spline from a station above the spline placement rack 1 to move to an adjacent station in the direction of the spline conveying mechanism;

[0055] The second lifting mechanism 3 is located on both sides of the spline placement rack 1 and between the first lifting mechanism 2 and the spline conveying mechanism, and is used to lift the spline from a workstation above the spline placement rack 1 to an adjacent workstation in the direction of the spline conveying mechanism, or to lift the spline from the spline placement rack 1 to the spline conveying mechanism.

[0056] In the present embodiment, the first lifting mechanism 2 and the second lifting mechanism 3 are both driving mechanisms for changing the position of the spline on the spline placement rack 1. The specific working method is that the initial position of the spline support plate of the first lifting mechanism or the second lifting mechanism is located below the top surface of the spline placement rack. When a spline is placed on the spline placement rack, the first lifting mechanism or the second lifting mechanism can first lift the spline in the vertical direction, and then move it in the direction of the spline conveying mechanism by a distance of one station, and then put the spline down in the vertical direction, so that the spline is replaced on the spline placement rack 1. In this way, the placement position of the spline on the spline placement rack 1 is moved inward by one station.

[0057] In this embodiment, the number of workstations above the spline placement rack 1 determines the number of splines that can be cached by the device of the present application, and the number of splines that can be simultaneously transported by the first lifting mechanism 2 and the second lifting mechanism 3 depends on the width of their spline support plates. Usually, the first lifting mechanism 2 and the second lifting mechanism 3 are each capable of transporting at least two splines.

[0058] Further, by Figure 2 and Figure 3 It can be seen that, in a feasible embodiment, the first lifting mechanism 2 includes:

[0059] The first push-pull cylinder 21 is used to drive other components to move in the direction of the spline conveying mechanism, and each time the components move a distance of one station;

[0060] The first movable base 22 is located at one side of the output end of the first push-pull cylinder 21 and is connected to the output end of the first push-pull cylinder 21 through a first connecting rod 23, and is used to carry other components of the first lifting mechanism. The first movable base 22 can be driven by the first push-pull cylinder 21 to reciprocate along the direction of the spline conveying mechanism.

[0061] The first lifting cylinder 24 is fixed on the first movable base 22; the output end of the first lifting cylinder 24 is vertically arranged upward, and is used to drive the first spline support plate 25 to move upward or downward in the vertical direction, so that the surface where the first spline support plate 25 is located can be higher or lower than the top surface of the spline placement rack 1.

[0062] The first spline support plate 25 is located above the first lifting cylinder 24 and is fixedly connected to the output end of the first lifting cylinder 24; the upper end surface of the first spline support plate 25 can be higher or lower than the horizontal plane of the spline placement rack 1 under the drive of the first lifting cylinder 24. Further, in order to ensure the stability during the spline transportation process, in a preferred embodiment, the upper surface of the first spline support plate 25 is also provided with a protrusion 251, which is used to separate the workstations, so that the splines can remain in a parallel state after transportation.

[0063] Further, by Figure 3 It can also be known that, in one embodiment, a first roller 221 is provided below the first movable base 22, and the first lifting mechanism 2 further includes:

[0064] The first track 26 is laid in a direction perpendicular to the spline conveying mechanism; the first roller 221 slides along the first track 26, and the structure of the roller and the track can ensure the stability of the first mobile base 22 during reciprocating movement, preventing the spline from overturning, changing position, and hindering subsequent transportation.

[0065] In this embodiment, the second lifting mechanism 3 has a similar structure to the first lifting mechanism 2. Figure 2 and Figure 4 It can be seen that the second lifting mechanism 3 includes:

[0066] A second push-pull cylinder 31;

[0067] A second movable base 32 is located at one side of the output end of the second push-pull cylinder 31 and is connected to the output end of the second push-pull cylinder 31 through a second connecting rod 33;

[0068] The second lifting cylinder 34 is fixed on the second moving base 32; the output end of the second lifting cylinder 34 is vertically arranged upward;

[0069] The second spline support plate 35 is located above the second lifting cylinder 34 and is fixedly connected to the output end of the second lifting cylinder 34; the upper end surface of the second spline support plate 35 can be higher or lower than the horizontal plane of the spline placement rack 1 under the drive of the second lifting cylinder 34.

[0070] Furthermore, a second roller 321 is provided below the second movable base 32, and the second lifting mechanism 3 further includes:

[0071] The second track 36 is laid in a direction perpendicular to the spline conveying mechanism; the second roller 321 slides along the second track 36 .

[0072] The functions of the components in the second lifting mechanism 3 can be found in the corresponding explanations in the first lifting mechanism 2, and will not be repeated here.

[0073] It should be noted that in the embodiments of the present application, the drive control of the first push-pull cylinder 21, the second push-pull cylinder 31, the first lifting cylinder 24, and the second lifting cylinder 34 can be executed by a software program or by manual operation, and there is no limitation on this. For example, the automatic start time can be set by a pre-set program. After being placed on the first workstation for a few seconds, the transportation operation from the first workstation to the second workstation is automatically performed. The transportation operation can also be performed after the previous workstation obtains a signal that the spline is to be placed.

[0074] It should also be considered that the first push-pull cylinder 21, the second push-pull cylinder 31, the first lifting cylinder 24, and the second lifting cylinder 34 in the present application all have a power supply, an external power supply, or an external power supply, or are all provided with power by a unified control system.

[0075] Furthermore, two of the first rails 26 and the second rails 36 are provided, and the first rails 26 and the second rails 36 are staggered so that when the first lifting mechanism 2 and the second lifting mechanism 3 work at the same time, they do not affect each other.

[0076] Further, by Figure 5 It can be seen that in a feasible embodiment, a plurality of spline positioning blocks 43 are detachably connected to one side of the spline conveying plate 4 close to the spline placing rack 1, and the two can be fixed in various ways, such as bolt fixing, latch fixing, etc.; the distance between the end face of the spline positioning block 43 and the slideway 41 is adjustable, so that the splines transported to the top of the spline conveying plate 4 can be aligned by the spline positioning block 43, which is more conducive to the operation of the next process.

[0077] The working process of the conveyor line buffer device provided by the present application can be Figure 6 Description: The figure takes five workstations (represented by (1), (2), (3), (4), and (5) as an example, wherein the first lifting mechanism 2 can undertake the spline transport operation at the workstations (1), (2), and (3), and the second lifting mechanism 3 undertakes the spline transport operation at the workstations (4) and (5). When three splines are placed on the spline placement rack 1 ( Figure 6 At this time, the first lifting mechanism 2 needs to be driven to complete the inward transport operation. First, the first lifting cylinder 24 drives the first strip support plate 25 to rise and lift the strip ( Figure 6 Then, the first push-pull cylinder 21 drives the first movable base 22 to move inward by a distance of one station, so that the splines are located above (2), (3), and (4) respectively ( Figure 6 Finally, the first lifting cylinder 24 drives the first strip support plate 25 to descend and place the strip on the strip placement rack ( Figure 6 Then, the first push-pull cylinder 21 drives the first movable base 22 to move outward as a whole by a distance of one station. At this point, a transport operation of the first lifting mechanism 2 is completed.

[0078] When the number of splines cached on the cache device reaches the maximum accommodating value, the second lifting mechanism 3 is required to complete the operation of transferring the splines on the spline placement rack to the spline conveying mechanism. The specific operation process can be described as follows: Figure 7To illustrate: Taking five workstations as an example, when five splines are placed on the spline rack ( Figure 7 At this time, the second lifting mechanism 3 needs to be driven to complete the inward transport operation. First, the second lifting cylinder 34 drives the second spline support plate 35 to rise and lift the spline ( Figure 7 Then, the second push-pull cylinder 31 drives the second movable base 32 to move inward by one station, so that the splines originally located at positions (4) and (5) are located above (5) and (6) respectively. Figure 7 The second lifting cylinder 34 then drives the second spline support plate 35 to descend and place the splines on the spline placement rack and the spline transfer plate. At this time, the second push-pull cylinder 31 cannot temporarily drive the second movable base 32 to return to its original position because it is necessary to wait for the push plate to push the splines to the next process. The first lifting mechanism can first perform the spline transport operation for the (1), (2), and (3) stations. The specific steps are as follows: Figure 7 As shown in (e)-(g), the specific process can be referred to Figure 6 Finally, after the push plate pushes the spline to the next process, the first push-pull cylinder and the second push-pull cylinder can simultaneously drive the first movable base and the second movable base to return to their positions, thus completing an overall inward transport operation. The idle station (1) can continue to carry new splines.

[0079] The caching device provided by the present application can effectively solve the problem of spline transportation efficiency. For example, assuming that it takes 30 seconds for a spline to be transported between two front and rear stations using a conveyor chain, using the caching device of the present application, it only takes 5 seconds to move from one station on the spline placement rack to another station inward. In this way, when the spline needs to be transported to the next cutting station, the device of the present application can transport one spline in 5 seconds, while the prior art can only transport one in 30 seconds, which obviously greatly improves the efficiency.

[0080] At the same time, when the previous station runs faster and the next station runs slower or suddenly slows down, the present application can implement a caching function and avoid the spline accumulation problem by setting up multiple stations for caching splines.

[0081] It can be seen from the above technical scheme that the present application provides a conveyor line buffer device, including a spline placement rack; a plurality of workstations for placing splines in parallel are arranged above the spline placement rack; a spline conveying mechanism, which is located on one side of the spline placement rack and is arranged parallel to the placed splines, including a spline conveying plate and a push plate located above the spline conveying plate; a slideway is provided on one side of the spline conveying plate, and a driving device is provided at one end of the slideway; the push plate is slidably connected to the slideway and can move along the direction of the spline conveying plate under the drive of the driving device; a first lifting mechanism is located on both sides of the spline placement rack, and is used to lift the spline from a workstation above the spline placement rack to the direction of the spline conveying mechanism to an adjacent workstation; a second lifting mechanism is located on both sides of the spline placement rack and is located between the first lifting mechanism and the spline conveying mechanism, and is used to lift the spline from a workstation above the spline placement rack to the direction of the spline conveying mechanism to an adjacent workstation, or lift the spline from the spline placement rack to the spline conveying mechanism. The present application realizes the transfer operation of the splines cached on the spline placement rack through a lifting mechanism composed of two groups of lifting cylinders and a push-pull cylinder, so that when the running speed difference between the two workstations is large, the excess splines can enter the next process in an orderly manner. In addition, the device provided by the present application can improve the stability of the spline transportation process and avoid the problem of poor spline pass rate caused by irregular placement.

[0082] Embodiment 2

[0083] Similar to the first embodiment, the present application also provides another conveyor line buffer device, including:

[0084] A spline placement rack 1; a plurality of stations for placing splines in parallel are arranged above the spline placement rack 1;

[0085] The spline conveying mechanism is located on one side of the spline placing rack 1 and is arranged parallel to the placed splines. In a feasible embodiment, it includes a spline conveying plate 4 and a push plate 5 located above the spline conveying plate 4; a slideway 41 is provided on one side of the spline conveying plate 4, and a driving device 42 is provided at one end of the slideway 41; the push plate 5 is slidably connected to the slideway 41, and can move along the direction of the spline conveying plate 4 under the drive of the driving device 42;

[0086] The first lifting mechanism 2 is located on both sides of the spline placement rack 1, and is used to lift the spline from a station above the spline placement rack 1 to an adjacent station in the direction of the spline conveying mechanism; or to lift the spline from the spline placement rack 1 to the spline conveying mechanism.

[0087] Different from the conveyor line buffer device in the above-mentioned embodiment 1, the device provided in this embodiment only uses one lifting mechanism to realize the transport function of the spline, and also has the same technical effect. For the structural functions of each part of the device of this embodiment, please refer to the corresponding description in embodiment 1.

[0088] Furthermore, the first lifting mechanism 2 includes:

[0089] A first push-pull cylinder 21;

[0090] A first movable base 22 is located at one side of the output end of the first push-pull cylinder 21 and is connected to the output end of the first push-pull cylinder 21 through a first connecting rod 23;

[0091] A first lifting cylinder 24 is fixed on the first moving base 22; an output end of the first lifting cylinder 24 is vertically arranged upward;

[0092] The first spline support plate 25 is located above the first lifting cylinder 24 and is fixedly connected to the output end of the first lifting cylinder 24; the upper end surface of the first spline support plate 25 can be higher or lower than the horizontal plane of the spline placement rack 1 under the drive of the first lifting cylinder 24;

[0093] A first roller 221 is disposed below the first movable base 22, and the first lifting mechanism 2 further includes:

[0094] The first track 26 is laid in a direction perpendicular to the spline conveying mechanism; the first roller 221 slides along the first track 26 .

[0095] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

Claims

1. A conveyor line buffer device, characterized in that: include: A spline placement rack (1); a plurality of workstations for placing splines in parallel are arranged above the spline placement rack (1); A spline conveying mechanism is located on one side of the spline placing rack (1) and is arranged parallel to the placed splines; A first lifting mechanism (2), located on both sides of the spline placement rack (1), used for lifting the spline from a workstation above the spline placement rack (1) to move in the direction of the spline conveying mechanism to an adjacent workstation; A second lifting mechanism (3) is located on both sides of the spline placement rack (1) and between the first lifting mechanism (2) and the spline conveying mechanism, and is used to lift the spline from a workstation above the spline placement rack (1) to an adjacent workstation in the direction of the spline conveying mechanism, or to lift the spline from the spline placement rack (1) to the spline conveying mechanism; The spline conveying mechanism comprises a spline conveying plate (4) and a push plate (5) located above the spline conveying plate (4); a slideway (41) is provided on one side of the spline conveying plate (4), and a driving device (42) is provided at one end of the slideway (41); the push plate (5) is slidably connected to the slideway (41), and can move along the direction of the spline conveying plate (4) under the drive of the driving device (42); The first lifting mechanism (2) comprises: A first push-pull cylinder (21); A first movable base (22) is located at one side of the output end of the first push-pull cylinder (21) and is connected to the output end of the first push-pull cylinder (21) via a first connecting rod (23); A first lifting cylinder (24) is fixed on the first movable base (22); an output end of the first lifting cylinder (24) is arranged vertically upward; A first spline support plate (25) is located above the first lifting cylinder (24) and is fixedly connected to the output end of the first lifting cylinder (24); the upper end surface of the first spline support plate (25) can be higher or lower than the horizontal plane of the spline placement rack (1) under the drive of the first lifting cylinder (24); A first roller (221) is provided below the first movable base (22), and the first lifting mechanism (2) further comprises: A first track (26) is laid in a direction perpendicular to the spline conveying mechanism; the first roller (221) slides along the first track (26); The second lifting mechanism (3) comprises: A second push-pull cylinder (31); A second movable base (32) is located at one side of the output end of the second push-pull cylinder (31) and is connected to the output end of the second push-pull cylinder (31) via a second connecting rod (33); A second lifting cylinder (34) is fixed on the second movable base (32); the output end of the second lifting cylinder (34) is arranged vertically upward; A second spline support plate (35) is located above the second lifting cylinder (34) and is fixedly connected to the output end of the second lifting cylinder (34); the upper end surface of the second spline support plate (35) can be higher or lower than the horizontal plane of the spline placement rack (1) under the drive of the second lifting cylinder (34); A second roller (321) is provided below the second movable base (32), and the second lifting mechanism (3) further comprises: A second track (36) is laid in a direction perpendicular to the spline conveying mechanism; the second roller (321) slides along the second track (36); The first lifting mechanism (2) and the second lifting mechanism (3) are both capable of lifting splines located at at least two workstations simultaneously.

2. The conveyor line buffer device according to claim 1, characterized in that: The first track (26) and the second track (36) are both provided with two tracks, and the first track (26) and the second track (36) are arranged staggered.

3. The conveyor line buffer device according to claim 2, characterized in that: A plurality of spline positioning blocks (43) are detachably connected to one side of the spline conveying plate (4) close to the spline placing rack (1); and the distance between the end surface of the spline positioning block (43) and the slideway (41) is adjustable.

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