JP3681536B2 - Pallet runaway prevention device for mechanical multilevel parking equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a pallet escape prevention device for preventing a pallet from escaping from a plurality of storage shelves arranged in parallel in the front-rear direction with respect to a transport means such as a transport cart in a mechanical multilevel parking apparatus.
[0002]
[Prior art]
Generally, in a mechanical multi-story parking apparatus that mounts and stores a vehicle on a pallet, a pallet escape prevention device is provided to prevent the pallet from escaping from the storage shelf. For example, in the pallet runaway prevention device disclosed in JP-A-8-177261, the push rod provided on the transport carriage is advanced to the storage shelf side, and the lock pin provided on the storage shelf is moved upward by the push rod. The pallet is projected and engaged with the pallet, and the pallet is positioned at a fixed position so as not to escape.
[0003]
[Problems to be solved by the invention]
By the way, in the mechanical multilevel parking apparatus in which the storage shelves are arranged in two rows in the front-rear direction with respect to the transport carriage, it is necessary to prevent the front and rear pallets from running away. Two devices are installed to prevent the escape of the front and rear pallets by the operation of separate pallet escape prevention devices. From the viewpoint of reducing the size of the apparatus, it is preferable that one pallet escape prevention device can prevent the pallet of the front and rear from being escaped.
[0004]
This invention is made in view of such a point, and the object is to share one pallet escape prevention device for preventing pallet escape in a plurality of front and rear storage shelves and to make the device compact. is there.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is characterized in that a single pallet escape prevention device is used to prevent escape of each of the storage shelves arranged in parallel in the front-rear direction.
[0006]
Specifically, the present invention includes a transport unit that transports a vehicle mounted on a pallet, and transfers the vehicle between the transport unit and a plurality of storage shelves arranged in parallel in the front-rear direction with respect to the transport unit. Then, in the mechanical multilevel parking apparatus that enters and exits, the following solution was taken for a pallet escape prevention apparatus that prevents the pallet from escaping from each storage shelf.
[0007]
That is, in the first aspect of the present invention, the push rod is provided in the transport means so as to be able to advance and retreat with respect to the storage shelf. Furthermore, an advancing / retreating operation means for advancing / retreating the push rod is provided. In addition, a plurality of lock pins are provided on the plurality of front and rear storage shelves so as to be able to protrude and retract in the vertical direction, and the lock pins are engaged with the positioning holes of the pallet so that the pallet does not run away. While positioning at the position, the pallet can be transferred by detaching it from the positioning hole of the pallet while the lock pins are immersed downward. In addition, cam plates formed with a plurality of elongated holes for engaging and guiding the lock pins are juxtaposed in a horizontally movable manner across the front and rear storage shelves. Then, the cam plate is pushed by a push rod that is advanced by operation of the advance / retreat operation means, and each lock pin is moved with respect to the positioning hole of the pallet by shifting the operation timing of each lock pin according to the pushing stroke. It is characterized by being individually engaged and disengaged.
[0008]
With the above configuration, in the first aspect of the present invention, when the push rod provided in the conveying means is advanced by the operation of the advance / retreat operating means and the cam plate on the storage shelf side is pushed in, the push shelf is provided in the plurality of front and rear storage shelves. The lock pin is engaged and guided by a cam comprising a long hole in the cam plate. At that time, by shifting the operation timing of each lock pin according to the pushing stroke of the cam plate, each lock pin engages and disengages individually with respect to the positioning hole of the pallet. The pallet escape prevention device is prevented by the basic pallet escape prevention device, and the device can be made more compact than the case of providing the pallet escape prevention device by the number of storage shelves.
[0009]
According to a second aspect of the present invention, in the pallet runaway prevention device of the mechanical multilevel parking device according to the first aspect, when the push rod pushing force is not applied, the cam plate is moved to a fixed position by the automatic return means. The lock pin is always pulled back, and in this return state, each lock pin protrudes upward and engages with a positioning hole of each pallet, and each pallet is locked so as not to escape.
[0010]
With the above configuration, in the invention described in claim 2, when the pushing force of the push rod is not acting, the cam plate is automatically pulled back to the fixed position by the automatic returning means, and each lock pin is moved upward. The pallet is locked so as not to escape. Therefore, there is no need for a return actuating device, and the device can be made more compact accordingly.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
2 and 3 show a mechanical multi-story parking apparatus, where 1 is a vehicle entrance / exit provided on the ground, and 2 is a storage part provided in the basement. In the storage section 2, a transport carriage 3 as a transport means travels on a travel path 4. On both sides of the travel path 4, a plurality of storage shelves 5 are arranged in three vertical rows and two front and rear rows. They are arranged side by side. At the time of loading and unloading, the transport carriage 3 is caused to travel along the upper and lower storage shelves in the travel path 4, and the vehicle C is moved along the pallet P between the transport carriage 3 and the front and rear two storage shelves 5. It is transferred by a double crank arm 31 of a transfer device 32 to be described later, and the vehicle C is transferred together with the pallet P between a lift (not shown) that connects the vehicle doorway 1 and the storage unit 2 and the transport carriage 3. It comes to be posted.
[0013]
As shown in FIGS. 4 to 6, the transport cart 3 includes a cart body 6 composed of a rectangular frame, and wheels 7 are rotatably attached to the four corners of the cart body 6 one by one. These wheels 7 are mounted on the two rails 8 laid on the travel path 4 so as to be able to roll when the travel motor 29 is activated.
[0014]
A pair of front and rear columns 9 made up of a frame assembly are erected on the cart body 6, and an elevator platform 10 made up of a frame framed in a rectangular shape is disposed between the columns 9. The elevator platform 10 is driven up and down. The apparatus 11 is supported horizontally by the both supports 9 so as to move up and down.
[0015]
The elevating drive device 11 includes an elevating motor 12 installed near the upper end of one (right side in FIGS. 4 and 5) of the column 9, and a drive sprocket 13 is fixed to the output shaft of the elevating motor 12. The driven sprocket 14 is disposed obliquely below and is connected to the drive sprocket 13 by an endless drive chain 15.
[0016]
A hoisting sprocket 16 is coaxially connected to the driven sprocket 14, and a first sprocket 17 and a second sprocket 18 are disposed below both sides of the hoisting sprocket 16, respectively. A third sprocket 19 is disposed near the upper end of the support 9. Further, a movable frame 20 is disposed on the inner side of each of the columns 9, and a fourth sprocket 21 is disposed at the lower end of the movable frame 20, and a fifth sprocket 22 is disposed at the upper end.
[0017]
The arrangement of the third to fifth sprockets 19, 21, and 22 is the same at the four corners of the lifting platform 10 and corresponds to the four corners of the lifting platform 10, and the lifting platform 10 has four hangs connected to the four corners. The chain 23 is suspended so as to be lifted and lowered. These four suspension chains 23 are the same in that one end is fixed to the installation portion 9a of the lifting motor 12 and is suspended over the first sprocket 17 and the hoisting sprocket 16. The closer two suspension chains 23 are stretched over the second to fifth sprockets 18, 19, 21, and 22 and connected to one end (right end in FIG. 4) of the lifting platform 10, while the lifting motor 12 The other two suspension chains 23 farther from the second are not connected to the second sprocket 18, but are separated from the movable frame 20 by another sixth and seventh sprockets arranged in front of and behind the cart body 6. 24 and 25, it is spanned to the third to fifth sprockets 19, 21, and 22 and connected to the other end (left end in FIG. 4) of the lifting platform 10.
[0018]
Two movable sprockets 26 are arranged on both lower sides of the first sprocket 17 so that the first sprocket 17 is a fixed sprocket so as to be movable up and down, and the suspension chains 23 are connected to the first sprocket 17 and the movable sprocket 26. The weights 27 are attached to the two movable sprockets 26, and the suspension chains 23 meander in a substantially W shape on both sides of the first sprocket 17. Thereby, when the lifting platform 10 is raised, the slack amount of the suspension chain 23 that is slacked on the first sprocket 17 side is set to 1/4 of the lifting stroke of the lifting platform 10 so that it does not hang down too much. Accidents caused by wrapping around are prevented.
[0019]
Further, stoppers 28 are projected inwardly at the upper end of the movable frame 20, while engaging pieces 30 are projected outwardly at the four corners of the lifting platform 10, and the lifting platform 10 is shown in FIG. 11B, the engaging piece 30 abuts and engages with the stopper 28 from below, and thereafter, the lifting platform 10 is movable frame as shown in FIG. 11C. As a result, it rises as one united with 20. A shock absorber (not shown) is disposed at a position corresponding to the lower end of the movable frame 20 of the cart body 6 and an engagement piece 30 is in contact with the stopper 28. The impact is absorbed when the movable frame 20 reaches the lower end when the frames are joined.
[0020]
Next, a procedure for raising and lowering the lifting platform 10 by the lifting drive device 11 configured as described above will be described.
[0021]
(Climbing action)
As shown in FIG. 11 (a), the lifting motor 12 is started from the state where the lifting platform 10 is at the lower end stop position, and the four suspension chains 23 are wound up synchronously. As a result, the elevator 10 starts to rise, but at this stage, the movable frame 20 does not move, and only the elevator 10 rises. As shown in FIG. 11 (b), when the lifting platform 10 is raised to the upper end of the movable frame 20, the engagement piece 30 comes into contact with the stopper 28 from below, and thereafter, as shown in FIG. 11 (c). The elevator 10 and the movable frame 20 continue to rise and stop at the upper end stop position. In this ascending process, the vehicle C is transferred together with the pallet P between the upper and lower storage shelves 5 and the lift, and is loaded and unloaded. During this time, the weight 27 descends, but the descending stroke is ¼ of the ascending stroke of the lifting platform 10, and it is possible to prevent a winding accident due to excessive hanging of the suspension chain 23.
[0022]
(Descent action)
As shown in FIG. 12 (a), the lifting motor 12 is started from the state where the lifting platform 10 is at the upper end stop position, and the four suspension chains 23 are synchronously rewound. As a result, the elevator 10 and the movable frame 20 are lowered integrally, and as shown in FIG. 12B, the movable frame 20 stops descending when it reaches the lower end stop position. As shown, the elevator base 10 continues to descend and stops at the lower end stop position. In this descending process, the vehicle C is transferred together with the pallet P between the upper and lower storage shelves 5 and the lift, and is loaded and unloaded. During this time, the weight 27 rises, but its rising stroke is 1/4 of the lowering stroke of the lifting platform 10.
[0023]
As described above, since the lifting drive device 11 horizontally supports the four corners of the lifting platform 10 with the four suspension chains 23 in a well-balanced manner, the lifting operation can be performed smoothly. Further, since the four lifting chains 23 are wound and unwound by one lifting motor 12, the lifting platform 10 is lifted and lowered, so that a simple structure can be achieved.
[0024]
A transfer device 32 having a double crank arm 31 composed of two arms 31a and 31b previously filed by the present applicant and already known is provided in the center of the lift 10 (Japanese Patent Laid-Open No. 9-125733). The transfer device 32 is used to transfer the vehicle C together with the pallet P between the lifting platform 10 and the upper and lower storage shelves 5 and between the lifting platform 10 and the lift. It is designed to come in and out. A plurality of guide rollers 33 are supported by the support frame 34 at the front and rear ends (left and right sides in FIGS. 4 and 5) of the lifting platform 10 and are arranged in the width direction to transfer the vehicle C (pallet P). Is supposed to be performed smoothly.
[0025]
As shown in FIGS. 13A to 13C, four positioning rods 35 are horizontally supported by a plurality of guide members 36 at the four corners of the lifting platform 10, and can advance and retreat with respect to the both columns 9. Is arranged. Each positioning rod 35 is connected to the tip of the piston rod 37 a of the power cylinder 37 by a connecting member 38, and moves forward and backward with respect to the column 9 by the expansion and contraction operation of the power cylinder 37.
[0026]
On the other hand, each of the support rods 9 includes four rod receiving members 39 as a set, and three sets of rod receiving members 39 correspond to the vehicle placement level of each of the upper and lower three storage shelves 5 and each positioning rod. It is installed at three places above and below so as to face 35. As shown in FIG. 6, the installation positions of these three sets of rod receiving members 39 are set so that one of the upper ends corresponds to a lift so that the lower two correspond to the middle and upper storage shelves 5, respectively. Has been. Note that the lower storage shelf 5 can be stably transferred by lowering the lifting platform 10 to the lower end stop position, and therefore the corresponding positioning rod 35 is not provided.
[0027]
When the vehicle is transferred, as shown in FIG. 13A, the lifting platform 10 is stopped slightly above each rod receiving member 39, and in this state, as shown in FIG. The power cylinder 37 is contracted synchronously to advance each positioning rod 35, and then, as shown in FIG. 13 (c), the lifting platform 10 is slightly lowered to move each positioning rod 35 to each rod. It is received by the receiving member 39, and the vehicle mounting level of the lifting platform 10 is positioned to the vehicle mounting level of the storage shelf 5.
[0028]
On the other hand, when raising and lowering the lifting platform 10, the four power cylinders 37 are operated to extend in synchronization with the lifting platform 10 being slightly lifted above each rod receiving member 39 to retract each positioning rod 35. In this retracted state, the elevating platform 10 is allowed to move up and down with an interval between each positioning rod 35 and each rod receiving member 39.
[0029]
Accordingly, the positioning rod 35, the power cylinder 37, and the rod receiving member 39 constitute a positioning device 40 that positions the vehicle mounting level of the lifting platform 10 to the vehicle mounting level of the storage shelf 5 when the vehicle is transferred.
[0030]
As described above, in this embodiment, the transport carriage 3 is stopped at the side of the desired storage shelf 5 and the four positioning rods 35 are advanced by the contraction operation of the power cylinder 37 to correspond to the four rod receivers corresponding thereto. Since the members 39 are received by the members 39, the lifting platform 10 can be stably supported horizontally on the transport carriage 3 by the pair of support columns 9, and even if the load fluctuates when the vehicle C is transferred. Without tilting, the vehicle mounting level of the lifting platform 10 can always match the vehicle mounting level of the storage shelf 5, and the vehicle C can be transferred smoothly and safely without hindering the transfer. In other words, since the lifting platform 10 is positioned only on the side of the transport carriage 3 regardless of the storage shelf 5, there is no way to avoid the column in the storage unit 2 due to circumstances on the building side, and the parallel pitch of the storage shelves 5 is different. Even in this case, the lifting platform 10 can be reliably positioned on the storage shelf 5.
[0031]
In this embodiment, each positioning rod 35 is configured to be advanced and retracted with respect to the support column 9 by the expansion and contraction operation of the power cylinder 37. On the contrary, the power cylinder 37 is disposed on the rod receiving member 39 side. Such advance / retreat operation means may be provided, and each rod receiving member 39 may be configured to advance / retreat with respect to the lifting platform 10 by this operation.
[0032]
As shown in FIG. 7 and FIG. 8, one push rod 41 is horizontally supported by a plurality of guide members 42 inside the row of one guide roller 33 of the lifting platform 10, and is attached to the storage shelves 5 on both sides. It is arranged so that it can move forward and backward. A rack 43 is fixed to the middle lower end of the push rod 41, and a pinion 45 connected to an output shaft of a push motor 44 as an advancing / retreating operation unit is engaged with the rack 43. The push rod 41 is advanced and retracted toward the storage shelves 5 on both sides by the rotation operation.
[0033]
On the other hand, as shown in FIGS. 9 and 10, each storage shelf 5 is provided with two shelf rails 46 (only one appears in the figure), and these shelf rails 46 have a plurality of guide rollers 47. It is arranged in a row so as to be continuous with the guide roller 33 of the elevator 10 so that the vehicle C (pallet P) can be transferred smoothly. One of the two shelf rails 46 is provided with two lock rails 48 at the front and rear of one shelf rail 46 so that the lock pins 48 can be moved up and down one by one. On the inner side, a single long cam plate 49 is juxtaposed so as to be movable in the horizontal direction across the two front and rear storage shelves 5. In the cam plate 49, a plurality of long holes 49a are formed at predetermined intervals in the longitudinal direction. On the other hand, on the shelf rail 46, a plurality of support rods 51 having rollers 50 attached to the tips protrude horizontally. The roller 50 is engaged with each of the long holes 49a, and the cam plate 49 is moved in the horizontal direction by the dimension of the long holes 49a.
[0034]
Further, the cam plate 49 is formed with cams 49b and 49c having two long holes, and the cam followers 52 attached to the respective lock pins 48 are engaged with the cams 49b and 49c. 49 is moved in the horizontal direction by the length of the long holes of the cams 49b and 49c. Of these cams 49b, 49c, the cam 49b corresponding to the front storage shelf 5 is formed in a long hole shape that extends horizontally toward the rear and inclines forward and rearward. The corresponding cam 49c is formed in the shape of a long hole that extends horizontally toward the rear side and then inclines forward and then extends horizontally.
[0035]
Further, one end of a wire 53 is connected to the traveling path 4 of the cam plate 49, and the wire 53 is rotated below the shelf rail 46 through a pulley 54 and is guided to move up and down by the guide frame 55. The other end is connected to a weight 56 as an automatic return means.
[0036]
When the vehicle C is not transferred, that is, when the pushing force of the push rod 41 is not acting, the cam plate 49 is always pulled back toward the traveling path 4 by the weight of the weight 56, as shown in FIG. Thus, the two lock pins 48 are pressed against the back ends of the cams 49b and 49c, respectively. In this state, both ends of the two lock pins 48 protrude upward and engage with the positioning holes p1 of both the front and rear pallets P, respectively, and lock the two pallets P so as not to escape and position them at a fixed position.
[0037]
On the other hand, when the vehicle is transferred to / from the front storage shelf 5, as shown in FIG. 1B, the push motor 44 is activated to advance the push rod 41 toward the storage shelf 5, and the cam plate 49 is moved. The weight 56 is moved horizontally to the rear side of the storage shelf 5 against the weight. As a result, the cam follower 52 of the front lock pin 48 descends the inclined portion of the cam 49b, and the front end of the front lock pin 48 sinks downward and comes out of the positioning hole p1 of the pallet P, and the elevator 10 and the front storage shelf 5 The vehicle C (pallet P) can be transferred between the two. However, at this stage, the cam follower 52 of the rear lock pin 48 is in the horizontal portion of the cam 49c and does not reach the inclined portion, and the rear lock pin 48 does not rotate and its tip protrudes. The pallet P is engaged with the positioning hole p1 while being kept, and the rear pallet P is locked so as not to escape and positioned at a fixed position.
[0038]
When the vehicle is transferred to / from the rear storage shelf 5, as shown in FIG. 1 (c), the push motor 44 is activated to store the push rod 41 further than in the case of FIG. 1 (b). The cam plate 49 is advanced to the shelf 5 side and further moved horizontally to the rear side of the storage shelf 5 against the weight of the weight 56. As a result, the cam follower 52 of the front lock pin 48 reaches the horizontal portion from the inclined portion of the cam 49b, and the front end of the front lock pin 48 rotates downward to disengage from the positioning hole p1 of the pallet P. The cam follower 52 of the rear lock pin 48 also reaches the lower horizontal portion through the inclined portion from the upper horizontal portion of the cam 49c, and the rear lock pin 48 also pivots downward so that the tip thereof is the positioning hole p1 of the pallet P. Deviate from. Therefore, the vehicle C (pallet P) can be transferred between the elevator 10 and the rear storage shelf 5.
[0039]
When the transfer of the vehicle C is completed, the push rod 41 may be retracted to release the pressing force against the cam plate 49, whereby the cam plate 49 is pulled toward the traveling path 4 by the weight of the weight 56. Returning to the state of FIG. 1A, the tips of the two lock pins 48 protrude upward and engage with the positioning holes p1 of the front and rear pallets P, respectively, and lock the pallets P so as not to escape. Position it at a fixed position.
[0040]
Therefore, the push rod 41, the push motor 44, the lock pin 48, and the cam plate 49 constitute a pallet escape prevention device 57 that is a feature of the present invention and prevents the pallet P from escaping from the storage shelf 5.
[0041]
Thus, by controlling the amount of horizontal movement of one cam plate 49 with one push motor 44, the operation timing of the two lock pins 48 engaged with the cams 49b and 49c can be shifted. Therefore, the locking and unlocking of the pallet P with respect to the two storage shelves 5 at the front and rear can be freely switched with one operating source. Further, since the cam plate 49 is automatically returned to the original position by using the gravity of the weight 56, a separate actuating device is not required, and the device can be made more compact accordingly.
[0042]
【The invention's effect】
As described above, according to the present invention, the push rod provided on the conveying means is advanced by the operation of the advance / retreat operating means, the cam plate on the storage shelf side is pushed in, and the lock pins provided on the front and rear storage shelves are The cam plate is configured to be engaged and guided by a cam formed by a long hole in the cam plate. At that time, the operation timing of each lock pin is shifted according to the pushing stroke of the cam plate, so that each lock pin is individually engaged with and disengaged from the positioning hole of the pallet. Therefore, the escape of the pallet before and after can be prevented by one pallet escape prevention device, and the apparatus can be made more compact than the case where the pallet escape prevention device is provided by the number of storage shelves.
[Brief description of the drawings]
FIG. 1 shows pallet locking and unlocking operations by a pallet runaway prevention device, where (a) shows a state where both the front and rear pallets are locked, and (b) shows a state where only the front pallet is unlocked, (C) is a state where both the front and back pallets are unlocked.
FIG. 2 is an overall schematic configuration diagram of a mechanical multilevel parking apparatus.
FIG. 3 is a plan view of a storage unit of the mechanical multilevel parking device.
FIG. 4 is a front view of a transport cart.
FIG. 5 is a plan view of a transport cart.
FIG. 6 is a side view of the transport carriage.
FIG. 7 is a front view of the pallet runaway prevention device.
FIG. 8 is a plan view of the pallet runaway prevention device.
FIG. 9 is a front view of a storage shelf side portion of the pallet runaway prevention device.
FIG. 10 is a plan view of a storage shelf side portion of the pallet runaway prevention device.
11A and 11B show the lifting operation of the lifting platform, in which FIG. 11A shows a state in which the lifting platform is at the lower end stop position, FIG. 11B shows a state in which the lifting platform is raised in the middle, and FIG. It is in a state of rising.
FIGS. 12A and 12B show the lowering operation of the lifting platform, in which FIG. 12A shows a state in which the lifting platform is at the upper end stop position, FIG. 12B shows a state in which the lifting platform is lowered in the middle, and FIG. It is in a state of descending.
FIGS. 13A and 13B show positioning operations by the positioning device of the lifting platform, in which FIG. 13A shows a state in which the positioning rod is retracted, FIG. 13B shows a state in which the positioning rod has advanced, and FIG. State.
[Explanation of symbols]
3 Transport cart (transport means)
5 Storage shelf 41 Push rod 44 Push motor (advance / retreat operation means)
48 Lock pin 49 Cam plate 49b, 49c Cam 56 Weight (automatic return means)
57 Pallet runaway prevention device C Vehicle P Pallet p1 Positioning hole

Claims (2)

Mechanical multi-story parking provided with transport means for transporting a vehicle mounted on a pallet, and transferring the vehicle between the transport means and a plurality of storage shelves arranged in parallel in the front-rear direction with respect to the transport means In the apparatus, the pallet runaway prevention device for preventing the pallet from running away from each storage shelf,
A push rod provided in the transport means so as to be movable back and forth with respect to the storage shelf;
Advancing and retracting means for advancing and retracting the push rod;
The upper and lower storage shelves are provided so as to be able to protrude and retract in the vertical direction, and engage with the positioning hole of the pallet while projecting upward to position the pallet in a fixed position so that it does not escape, A plurality of lock pins that allow the pallet to be transferred by separating from the pallet positioning holes;
A cam plate formed in parallel with the plurality of storage shelves in front and rear so as to be movable in the horizontal direction and formed with a plurality of long holes for engaging and guiding the lock pins;
The cam plate is pushed in by a push rod that advances by the operation of the advance / retreat operation means, and each lock pin is moved with respect to the positioning hole of the pallet by shifting the operation timing of each lock pin according to the pushing stroke. A pallet runaway prevention device for a mechanical multi-story parking device, characterized in that it is individually engaged and disengaged. In the pallet runaway prevention device of the mechanical multilevel parking device according to claim 1,
When the pushing force of the push rod is not applied, the cam plate is always pulled back to a fixed position by the automatic return means. In this return state, the lock pins protrude upward and engage the positioning holes of the pallets. A pallet escape prevention device for a mechanical multilevel parking apparatus, wherein each pallet is locked so as not to escape.

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