JP2009040518A - Feeding and conveying-out device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently supply a glass substrate to a segmentation system without any interruption. <P>SOLUTION: Glass substrates are successively and continuously supplied by arranging an intermediate delivering device J composed of a movable rack E with laden pallets P being mounted in a multiple stage, and a conveyor for traveling the cargo-received pallets in the longitudinal direction, a two-stage upper-and-lower conveyors composed of a lower stage conveyor 25 for transferring the laden pallet P from a conveyor 14 on an elevating/lowering floor and an upper stage conveyor 24 for transferring an empty pallet, a conveyor 27 with a lift 26 for further feeding empty pallets and a transfer machine M with a sucked cargo receiving means L. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a supply and carry-out device for loading a large glass substrate before dividing into product sizes and paying out a small glass substrate with the product size after dividing.

A large glass substrate (for example, a liquid crystal panel formed by laminating two plate glasses) is divided (divided) into product sizes.
In the above dividing system, a cutting line is first sliced by a cutter on a small line of a glass substrate, and the glass substrate on which the cutting line is sliced is sent to a dividing / breaking position, so An impact is applied to the sliver portion by a folding member such as a roll so as to fold it (Patent Document 1).
JP 2003-119043 A

  By the way, in order to supply (inject) a glass substrate to the cutting system of Patent Document 1, the laminated glass substrate in the pallet is carried out manually or by using a suction holding type robot.

  However, when there is no glass substrate in the pallet, the empty pallet is dispensed and the next pallet containing the glass substrate (hereinafter referred to as the actual pallet) is inserted. In particular, there is a problem that a lot of labor is required due to manual labor and the like, because the replacement is frequently performed with a significant increase in efficiency.

  In addition, when the divided glass substrate is discharged into the empty pallet when the divided glass substrate is dispensed, the actual pallet is unloaded and the empty pallet is loaded into the small glass dispensing point. There was a problem like this.

  Therefore, according to the present invention, the supply of an actual pallet (stacked glass substrate) and the discharge of an empty pallet, and the supply of an empty pallet for storing a small glass substrate and the discharge of an actual pallet can be performed very smoothly. It is in providing the supply and carrying-out apparatus which were made.

  In order to solve the above-described problems, the present invention slices a cutting for cutting on a glass substrate, carries the sliced glass substrate into a next splitting device, and converts the slicing cutting line into the splitting device. In a cutting system that is divided by a split member, a receiving part for receiving both sides of the lower surface of a multi-stage actual pallet in which glass substrates and buffer spacers are alternately stacked and stored on the sheet glass supply side of the cutting system Is placed in a multi-stage on both sides, and then the movable floor is moved up and down by the lifting device of the rack height next to the movable rack, and the bottom of the pallet in the movable rack and the bottom of the pallet in the movable rack. A load receiving fork that slides forward and backward by the advancing and retreating means, a lifting means for raising the fork to the receiving state of the pallet, and the fork on the lifting floor. An intermediate delivery device comprising a conveyor for receiving the pallet received during the descent and traveling in the front-rear direction is provided. Next to this intermediate delivery device, the actual pallet is transferred from the conveyor on the elevator floor, and the conveyor on the elevator floor is moved to the conveyor. An upper and lower two-stage conveyor for transferring an empty pallet is provided, an actual pallet on the lower conveyor is transferred next to the upper and lower two-stage conveyor, and a lift with a conveyor for sending an empty pallet to the upper conveyor is provided, A traveling body provided so as to advance and retreat by means of advancing / retreating means between the lift conveyor immediately above and the front discharge point and directly above the empty pallet on the upper conveyor; Adopting a configuration with a transfer machine composed of suction load receiving means for sucking substrates and spacers

  Also, a cutting line for slicing is slied on the glass substrate, and the slicing glass substrate is carried into the next splitting device, and the slicing cutting line is split by the split member of the splitting device. In the dividing system, a traveling body provided on the dispensing side of the dividing system so as to be advanced and retracted by advancing / retreating means between immediately above and the front of the divided glass substrate, and the traveling body is moved up and down via the lifting means, A dispensing transfer machine comprising a suction load receiving means for sucking the glass substrate is provided, a standby device for spacers stacked immediately below the forward travel path of the suction load receiving means is provided, and the suction load receiving device is disposed in front of the standby device for the spacer. The empty pallet is placed on standby to receive the supply of the glass substrate that is held by suction by the means, and travels in the receiving direction of the empty pallet and in the forward dispensing direction. There are upper and lower conveyors with lifting lifts that can transfer pallets to the stationary conveyor in two stages, upper and lower, in front of the stationary conveyor, and the lower surface of the multistage case in front of the upper and lower conveyors. An elevating floor in which a moving rack having a multi-stage receiving section for receiving both sides is arranged on both sides, and the moving rack is raised and lowered by an elevating device between the moving rack and the upper and lower conveyors. A load receiving fork that slides forward and backward by advancing and retreating means on the lifting floor and a bottom side of the pallet in the movable rack, lifting means for raising the fork to the pallet receiving state, and the forking on the lifting floor Adopting a configuration with an intermediate delivery device that consists of a conveyor that receives the pallet that was received when it descends and runs in the front-rear direction .

  As described above, according to the supply device of the present invention, the pallet of this movable rack is transferred to the intermediate delivery device by carrying in the movable rack in which the glass substrate storage pallets are mounted in multiple stages on the supply side of the cutting system. The fork lifts up and down the upper and lower two-stage lower conveyor to the lifted conveyor, and as the lift rises, the glass substrate in the pallet is supplied to the cutting system by the suction load receiving means of the transfer machine. The inner spacer is automatically returned to the empty pallet on the upper and lower upper conveyors by the suction load receiving means of the transfer machine in sequence, and the spacer-contained pallet is returned to the moving rack through the intermediate delivery device. The empty pallet after the supply of all glass substrates is fed from the lift side conveyor onto the upper and lower upper conveyors. The glass substrate supply and spacer recovery operations can all be performed automatically. Especially, it is possible to supply the moving rack continuously for a long time only by bringing in the mobile rack, which has the unique effect of significantly increasing the operating rate of the cutting system. is there.

  In addition, by loading an empty pallet-mounted mobile rack onto the delivery side of the dividing system, the empty pallet of the mobile rack is sent from the lift floor to the upper and lower conveyors by the intermediate transfer device fork onto the stationary conveyor. The stacking spacers and the divided glass substrates that are made to stand by by the suction load receiving means of the transfer and transfer machine are alternately stored on the empty pallet on the stationary conveyor, and the stored pallet of the divided glass substrates is a conveyor of the intermediate transfer device having a fork. Since the empty pallet is transferred to the stationary conveyor from the lower conveyor where the empty pallet is lifted and stopped, it is automatically transferred to the pallet and stored in the pallet. In particular, long-term continuous collection can be achieved simply by loading a mobile rack loaded with empty pallets. There is a unique effect to measure a significant up the operating rate of the cutting system Te.

Embodiments of the present invention will be described with reference to the accompanying drawings.
In the present invention, when the glass substrate A is supplied as shown in FIG. 1, a cutting line is slived by the cutter B on the plate surface of the glass substrate A during the traveling of the glass substrate A sucked and held on the traveling carriage 1, When the slived glass substrate A is received by the next traveling carriage 2 and reaches the front folding device C, the cutting line is broken by the folding member 3 such as bar material or curl of the folding device C. For example, there is an apparatus disclosed in Patent Document 1 as the cutting system D, and details thereof are omitted since they are publicly known.

  Then, the smooth loading of the glass substrate A on the supply side of the cutting system D and the recovery on the discharge side of the divided glass substrate A ′ by the cutting system D are performed smoothly.

  In the first embodiment of the present invention, as shown in FIGS. 1 to 10, on the pallet P, buffer spacers S (for example, paper and film) are alternately stacked on a glass substrate A as shown in FIG. It is stored.

On the glass substrate supply side of the cutting system D, mobile racks E in which multiple pallets for storing glass substrates A (hereinafter referred to as actual pallets) pallets P are loaded.
In mounting the multi-stage pallet P on the movable rack E, a plurality of cradle portions 11 for receiving both sides of the lower surface of the pallet P are provided on the upper and lower sides of the movable rack E.

  In addition, on the front side of the movable rack E, the lift floor 12 that moves the height range of the movable rack E by the lift device F, and the advancing / retracting means G on the lift floor 12 and on the bottom side of the bottom surface of the pallet P in the movable rack E. The load receiving fork 13 that slides forward and backward by the lift, the lifting means H that lifts the fork 13 into the receiving state of the pallet P, and the conveyor 14 that moves the pallet P loaded on the lifting floor 12 as the fork 13 descends in the front-rear direction. An intermediate delivery device J constituted by

  The lifting device F includes, for example, a pulley 16 provided at the upper end of a square standing column member 15 in the case of illustration, a wire 17 having a tip connected to both corners of the lifting floor 12 across the pulley 16, The wire 17 is composed of a winder (not shown) that winds and unwinds the wire 17, and the forward / backward means G of the fork 13 includes, for example, a guide rail 18 in the front-rear direction provided on the lifting floor 12, A base 20 in which a slider 19 on both lower surfaces is slidably engaged with the guide rail 18, a male screw 21 along which the guide rail 18 is rotatably supported, and a base 20 screwed into the male screw 21. And a motor 23 that reversibly drives the male screw 21, and the fork 13 is moved up and down by a vertical guide 30 on the base 20. To hold the opposite side of the enclosure E, are to raise the forks 13, for example, by extension action of the cylinder as a lifting means H.

  With the configuration as described above, when the male screw 21 is driven by the forward rotation operation of the motor 23, the fork 13 is thrust into the moving rack E under the receiving pallet P as shown in FIG. The fork 13 is raised, the actual pallet P is received on the fork 13, and the lower side of the actual pallet P is lifted as shown in FIG.

  By maintaining this situation and driving the male screw 21 by the reverse operation of the motor 23, the actual pallet P received by the fork 13 is pulled out from the moving rack E, and as shown in FIG. After loading, the fork 13 is lowered by the lifting means H and the actual pallet P is received on the conveyor 14 as shown in FIG.

  Further, next to the intermediate delivery device J, there are an upper conveyor 24 and a lower conveyor 25 in two upper and lower stages. An empty pallet P ′ is transferred to the upper conveyor 24 and waits. The actual pallet P is transferred from the conveyor 14 of the lifting floor 12.

Next to the upper conveyor 24 and the lower conveyor 25, a conveyor 27 with a lift 26 on which the actual pallet P on the lower conveyor 25 is loaded is provided.
The lift 26 is not limited, although a cylinder is used in the illustrated case.

The stop level of the conveyor 27 raised by the lift 26 is set to the same level as that of the upper conveyor 24.
Further, a traveling body 28 provided so as to travel by advancing / retreating means K and a traveling body 28 are lifted / lowered via a lifting / lowering means 29 between the top of the upper conveyor 24 and the receiving of the glass substrate A of the cutting system D. A loading / unloading machine M constituted by a glass substrate A of the pallet P and suction load receiving means L for sucking the spacer S after the glass substrate A is taken out is provided.

  The advancing / retreating means K includes a horizontal member 31, a slider 33 provided on the traveling body 28 on a guide rail 32 in the longitudinal direction provided on the horizontal member 31 and slidably engaged, and both ends of the horizontal member 31 at both ends. Is constituted by a male screw 34 that is rotatably supported, a female screw 35 that is screwed into the male screw 34 and attached to the traveling body 28, and a motor 36 that reversibly drives the male screw 34. Although the traveling body 28 is moved forward and backward, the traveling body 28 may be moved back and forth depending on other configurations.

  The suction load receiving means L is composed of a plate 37 that moves up and down by the action of a cylinder as the lifting means 29 and a suction cup 38 that is disposed on the lower surface of the plate 37 and can release suction and suction, but is limited to this method. It is also possible to use a box having a small hole group on the bottom wall of the lower surface and capable of suctioning and releasing suction.

  If comprised as mentioned above, by carrying the mobile rack E to the supply side of the parting system D as shown in FIG. 1, the multistage actual pallet P mounted in the mobile rack E is moved to the fork 13 of the intermediate delivery device J. The actual pallet P drawn out onto the elevating floor 12 is first received by the conveyor 14 and transferred onto the lower conveyor 25 and then onto the conveyor 27 of the lift 26 that is lowered.

  Thereafter, the lift 26 is raised to a fixed position, the glass substrate A of the actual pallet P on the conveyor 27 is sucked and held by the suction load receiving means L, and then transferred by the traveling body 28 of the loading / unloading machine M. After that, the suction load receiving means L is lowered to the lifting means 29, and then the suction of the suction load receiving means L is released and the glass substrate A is taken down, so that it is placed on the traveling carriage 1 of the cutting system D (as shown in FIG. 10). A) A glass substrate A is supplied.

  The empty suction load receiving means L returns directly above the actual pallet P, descends by the lifting means 29, sucks and holds the spacer S in the actual pallet P, and lifts the suction load receiving means L by the lifting means 29 after holding, Next, after the traveling body 28 is moved backward and stopped, the suction load receiving means L is moved down by the elevating means 29 and the suction is released, whereby the spacer S is removed from the empty pallet P ′ of the upper conveyor 24.

  The pallet P ′ containing the spacer S is transferred to the conveyor 14 of the elevating floor 12 by the operation of the conveyor 24, and then returned to the moving rack by the forward slide of the fork 13, and is moved to the receiving part 11 by the lowering of the fork 13. The pallet P ′ containing the spacer S is received.

With the above operation, the glass substrate A of the actual pallet P in the movable rack E is sent to the cutting system D, and the pallet P ′ from which the spacer S has been collected returns to the movable rack E.
Note that the empty pallet P ′ is transferred from the conveyor 27 to the upper conveyor 24 as the glass substrate A is unloaded and the spacer S is recovered, and is used for recovering the spacer S on the upper conveyor 24.

  In the second embodiment of the present invention, as shown in FIG. 1, it is arranged on the dispensing side of the divided glass substrate A ′ by the dividing system D. As shown in FIGS. 1 and 11 to 16, the traveling carriage 2 Next to (in front of) the forward stop position, a traveling body 28 ′ provided so as to travel by the advancing / retreating means K ′, and the traveling body 28 ′ are moved up and down via the lifting and lowering means 29 ′ and on the traveling carriage 2. An unloading / transferring machine M ′ configured with suction load receiving means L ′ that sucks each of the divided glass substrates A ′ and sucks the spacer S that is waiting is provided.

  The advancing / retreating means K ′ traveling body 28 ′, lifting / lowering means 29 ′, and suction load receiving means L ′ constituting the carry-out transfer machine M ′ are the same as the carry-in transfer machine M of the first embodiment, and the suction load receiving means. Since L is the same as the load receiving means L of the first embodiment, the description of the configuration and operation is omitted.

Further, a moving rack E ′ on which empty pallets P ′ are mounted in multiple stages is carried in front of the unloading / transferring machine M ′.
The method (configuration) in which empty pallets P ′ are mounted on the movable rack E ′ in multiple stages via the support 11 ′ is the same as the movable rack E of the first embodiment, and the description thereof is omitted.

  Further, an intermediate transfer device J ′ similar to that of the first embodiment is arranged in front of the movable rack E ′, and an elevating device F ′, an elevating floor 12 ′, and advancing and retreating that constitute the intermediate transfer device J ′. Means G ′, fork 13 ′, elevating means H ′, and conveyor 14 ′ are the same as those in the first embodiment (intermediate delivery device J), and their operations are also the same, and the description thereof is omitted.

  Further, in front of the intermediate delivery device J ′, there are an upper conveyor 42 and a lower conveyor 43 that are lifted and lowered by a lift 41 in two stages, upper and lower, where both ends face in the front-rear direction and the lower surfaces of both sides of the empty pallet P ′ enter. It is provided.

  In addition, a stationary conveyor 44 that travels in the front-rear direction (the lower pallet P 'enters the lower surface) is provided in front of the upper conveyor 42. The traveling line of the stationary conveyor 44 is lifted by a lift 41. The line of the lower conveyor 43 is set to the same level. Of course, the line of the upper conveyor 42 and the line of the stationary conveyor 42 when lowered by the lift 41 are at the same level.

Further, between the stationary conveyor 44 and the traveling carriage 2 that has stopped moving forward, a standby device 45 for the spacer S that is stacked so as to be removable from the top is provided.
The standby device 45 is formed, for example, by erecting L-shaped pillars at four corners, and the spacers S inserted into the spaces of the pillars from above are at the upper level as they are removed from the uppermost level. The lift 46 is pushed up so that the upper level rises as the value decreases.

  When configured as described above, the empty pallet P ′ mounted in multiple stages on the movable rack E ′ is moved by the advancing of the fork 13 ′ by the advancing / retreating means G ′ and the rising of the fork 13 ′ by the lifting / lowering means H ′. An empty pallet P ′ is levitated from 11 ′, then the empty pallet P ′ transferred together with the fork 13 ′ is pulled out by the advancing / retreating means G ′ onto the lifting floor 12 ′, and then the fork 13 ′ is lowered by the lifting means H ′. Then, an empty pallet P ′ is transferred onto the conveyor 14 ′.

  The empty pallet P ′ is transferred to the upper conveyor 42 by the operation of the conveyor 14 ′, and the empty pallet P ′ is transferred from the conveyor 14 ′ to the lower conveyor 43 (by raising and lowering the elevating floor 12 ′). Let me.

  The unloading / transferring machine M ′ travels the traveling body 28 ′ to the position directly above the traveling carriage 2, and then lowers the suction load receiving means L ′ by the elevating means 29 ′, and each divided glass substrate A ′ on the traveling carriage 2. Hold the suction. Thereafter, the suction load receiving means L ′ is raised while the divided glass substrate A ′ is sucked and held by the lifting means 29 ′.

  Thus, after the traveling body 28 'is moved forward and stopped just above the empty pallet P' on the stationary conveyor 44, the holding and suction load receiving means L 'for the divided glass substrate A' is lowered by the elevating means 29 '. Next, the suction of the suction load receiving means L ′ is released, and each divided glass substrate A ′ is lowered into an empty pallet P ′. After that, the uppermost spacer S of the spacer standby device 45 is picked up by the divided glass substrate A ′ on the traveling carriage 2, transferred, and lowered to the suction load receiving means L ′ after reaching directly above the empty pallet P ′. The procedure of sending and releasing the suction is carried out and lowered onto the divided glass substrate A ′ in the empty pallet P ′.

  By repeating the above, when the divided glass substrates A ′ and the spacers S are alternately stacked and become full, they are transferred onto the upper conveyor 42 by the operation of the stationary conveyor 44, and are transferred from the upper conveyor 42 to the conveyor 14 ′ of the lifting floor 12 ′. The pallet P ′ that has been transferred to the top and filled up on the elevating floor 12 ′ is sent onto the receiving portion 11 ′ of the moving rack E ′ via the fork 13 ′.

  When the empty pallet P ′ is fed onto the stationary conveyor 44, the upper conveyor 42 and the lower conveyor 43 are raised together by the lift 41, and when the level of the stationary conveyor 44 and the lower conveyor 43 becomes the same level, An empty pallet P ′ is sent to the stationary conveyor 44. When there is no empty pallet P ′ in the movable rack E ′ and the storage pallet for the divided glass substrate A ′ is full, the loaded movable rack E ′ for the empty pallet P ′ is loaded.

  When the divided glass substrate A ′ is divided into four glass substrates A in the illustrated case, and each divided glass substrate A ′ is stored in each empty pallet P ′, as shown in FIG. An empty pallet P ′ is dropped between the positioning claws 62 on the base 61 and positioned. Of course, the movable rack E ′ is provided with multiple pallets P ′ for each base 61 (not limited to the four divisions shown in the figure, but may be divided into a plurality of divisions).

  Then, when the divided glass substrate A ′ is sucked from the traveling carriage 2 via the suction load receiving means L ′ and the divided glass substrate A ′ is stored in the empty pallet P ′, a gap ( It is necessary to provide an interval.

  17 and 18, as shown in FIGS. 17 and 18, a plate 37 'having a suction cup 38' of a pair of front and rear suction load receiving means L 'and L' and a pair of left and right suction load receiving means L 'and L' is used. The X-axis moving means 63 and the Y-axis moving means 64 are moved toward and away from each other as shown in FIGS. 19 to 20 to provide a space between adjacent edges (sides) of the divided glass substrate A ′.

  In the illustrated case, the X-axis moving means 63 and the Y-axis moving means 64 include a male screw 65 having left and right screws on both ends from the center portion, and slides back and forth and left and right by the guide means 67 on the male screw 65. The female screw 66 of the plate 38 to be driven is screwed in and the male screw 65 is driven by the motor 68.

The side view which shows 1st Embodiment of this invention. The top view same as the above. The enlarged side view which shows the principal part same as the above. The enlarged plan view of a rack and an intermediate delivery apparatus. The longitudinal front view same as the above. The front view of a rack. A longitudinal front view of an actual pallet. The vertical side view which shows taking out of a full pallet. The vertical side view which shows the movement of a full pallet. The partial vertical side view which shows a carrying-in transfer machine. The side view which shows 2nd Embodiment. The top view same as the above. The enlarged side view which shows the principal part same as the above. The longitudinal cross-sectional enlarged side view which shows the upper and lower two steps of conveyors. The vertical side view which shows use of a carrying-out transfer machine. The top view which shows alignment of an empty pallet. The partial notch side view which shows the moving means of an X-axis. The partially cutaway front view showing the Y-axis moving means. The top view of a parting glass substrate. The top view which shows separation of a division | segmentation glass substrate.

Explanation of symbols

A Glass substrate B Cutter C Folding device D Dividing system E, E 'Moving rack F, F' Lifting device G, G 'Advancement / retraction means H, H' Lifting means J, J 'Intermediate delivery device K, K' Advancement / retraction means L , L ′ Suction load receiving means M Loading / unloading machine M ′ Loading / unloading machine S Spacer P Actual pallet P ′ Empty pallet 1, 2 Traveling carriage 3 Folding member 11, 11 ′ Receiving part 12, 12 ′ Lifting floor 13 , 13 'Fork 14, 14' Conveyor 15, 15 'Pillar 16, 16' Pulley 17, 17 'Wire 18, 18' Guide rail 19, 19 'Slider 20, 20' Base 21, 21 'Male thread 22, 22 'Female screw 23, 23' Motor 24 Upper conveyor 25 Lower conveyor 26 Lift 27 Conveyor 28, 28 'Traveling body 29, 29' Lifting means 30 Guide 31 Horizontal material 32 Rail 33 Slider 34 Male screw 3 Female screw 36 motor 37 plate 38 the suction cups 41 lift 42 upper conveyor 43 lower conveyor 44 stationary conveyor 45 spacer standby unit 46 lifts 61 base 62 positioning pawl

Claims (2)

  In a cutting system in which a glass substrate is sliced for cutting, and the slicing glass substrate is carried into the next splitting device, and the slicing cutting line is split by the split member of the splitting device. In this cutting system, a movable rack is provided with multi-stage support racks on both sides of the bottom side of the multi-stage pallet containing glass substrates and buffer spacers stacked and stored alternately on the plate glass supply side. A lifting floor that is lifted and lowered by the rack height range lifting device next to the movable rack, a load receiving fork that slides forward and backward by advancing and retracting means on the lifting floor and on the bottom side of the pallet in the movable rack, Lifting means for raising the fork to the pallet receiving state, and receiving the pallet received when the fork is lowered on the lifting floor. An intermediate transfer device composed of a conveyor that travels in the rear direction is provided. Next to the intermediate transfer device, an actual pallet is transferred from the conveyor on the elevator floor, and an empty pallet is transferred to the conveyor on the elevator floor. A conveyor with a stage is provided, and the actual pallet on the lower conveyor is transferred next to the upper and lower conveyors, and a lift with a conveyor for sending empty pallets to the upper conveyor is provided. A traveling body provided so as to advance and retreat by advancing and retreating means between the point and an upper pallet on the upper conveyor, and a suction load receiving means for ascending and descending the traveling body via the elevating means and sucking the glass substrate and the spacer A supply device characterized in that a transfer machine comprising:   A cutting system in which a cutting line for slicing is sliced on a glass substrate, the slicing glass substrate is carried into a next splitting device, and the slicing cutting line is split by a split member of the splitting device. A traveling body provided on the payout side of the dividing system so as to advance and retreat by advancing and retreating means between immediately above and in front of the divided glass substrate, and moving up and down the traveling body via the elevating means. A suction transfer device comprising a suction load receiving means for sucking in, a spacer standby device stacked immediately below the forward travel path of the suction load receiving means is provided, and the suction load receiving means is provided in front of the spacer standby device. Wait for the empty pallet to receive the supply of the glass substrate that is held by suction, and run in the direction of receiving the empty pallet and discharging it forward. An upper and lower conveyors with lifting lifts that can transfer pallets to the stationary conveyor in two stages, upper and lower, are provided in front of the stationary conveyor. Both upper and lower conveyors are provided in front of the upper and lower conveyors. A movable rack provided with a plurality of stages on both sides of the rack for receiving the rack, and a lifting floor that is moved up and down by a lifting device of the movable rack length between the movable rack and the upper and lower conveyors; A load receiving fork that slides forward and backward by advancing and retreating means on the lifting floor and the bottom side of the pallet in the movable rack, lifting means for raising the fork to a pallet receiving state, and the fork on the lifting floor. An intermediate delivery device comprising a conveyor for receiving a pallet that has been received at the time of descent and traveling in the front-rear direction is provided. Detection device.

Images