JP5305004B2 - Pallet shelf equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate empty pallet discharge work after picking work, without installing any exclusive empty pallet storage section equipped with a reversely sloped pallet sliding support table for discharging an empty pallet, in the pallet rack equipment equipped with multiple pallet sliding support tables in parallel that slope from a loaded pallet supply end 4a for supplying the cargo-loaded pallet toward a picking work end 4b and that are long enough to support at least two pallets in-line. <P>SOLUTION: At least one pallet sliding support table 10 is supported pivotally with an axis to freely seesaw, and is structured so that an upward tilted state of the loaded pallet supply end 4a located at the upper tilted end and a downward tilted state of the picking work end 4b located at the upper tilted end can be switched over, and is also equipped with a locking means 12 to freely lock/unlock this free seesawing pallet sliding support table 10 at least in the upward tilted state. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a pallet shelf facility configured so that a picking operation can be performed from the other side of a shelf with respect to a load on a pallet replenished by a forklift from one side of the shelf.

As described in Patent Document 1, the pallet shelf equipment that can be used as described above is inclined downwardly from one carry-in side of the shelf toward the other carry-out port of the shelf and has at least two pallets. A plurality of pallet sliding support bases having a length that can be supported in series are arranged in parallel. In the shelf facility shown in Patent Document 1, the pallets that are slid on the pallet sliding support base and stored in order from the carry-out side are unloaded in order from the carry-out side by a forklift. It is also possible to use the picking work in which the operator directly takes out the load from the actual pallet located at the end on the carry-out side. In this case, it is necessary to carry out the empty pallet located at the end on the carry-out side. However, like the shelf equipment shown in Patent Document 1 (the application is different), an empty pallet with a reverse gradient in a part of the shelf. A pallet sliding support stand dedicated to carrying out is arranged, and the empty pallet transferred on the pallet sliding support stand dedicated to carrying out empty pallets can be slid to the end on the carry-in side of the shelf, and this can be carried out by a forklift. It is conceivable to configure as follows.
Japanese Patent Laid-Open No. 5-105209

  As described above, in the configuration in which the pallet sliding support base exclusively for carrying out the reverse-gradient empty pallet is arranged on a part of the shelf, not only the actual pallet storage efficiency as the whole shelf is lowered, but also a bulky box as a pallet When using a flat pallet that can be stacked with multiple forks and transported by a forklift instead of a pallet, the end of the pallet sliding support for carrying out an empty pallet In other words, it is difficult to stack empty flat pallets on the inclined upper end of the pallet sliding support base, so that the empty flat pallet is stopped at the inclined upper end of the pallet sliding supporting base. There is a problem in practical use, such as having to provide a proper stopper.

The object of the present invention is to provide a pallet shelf facility that can solve the conventional problems as described above, and the pallet shelf facility according to claim 1 uses the reference numerals of the embodiments described later. As shown, the pallet sliding support has a length that is inclined downward from the actual pallet replenishment end 4a for replenishing the loaded pallet toward the picking work end 4b and can support at least two pallets in series. A pallet shelf facility in which a plurality of pedestals 5 are arranged side by side, and at least one of the pallet sliding support bases 5 is pivotally supported so as to freely move on a seesaw, and the actual pallet replenishment end 4a is positioned at the upper end of the tilt. And a picking work end 4b that can be switched to a reverse inclined position positioned at the upper end of the inclination. ) At least the engaging releasable locking means 12 for locking the in-site pallet rack system with positive inclined position, the seesaw motion freely pallet sliding support table (movable pallet sliding support 10) is positive slope A configuration that can be locked by the locking means 12 only in a posture, and that is biased in one direction so as to automatically return from a reverse tilt posture to a normal tilt posture in an empty state in which no pallet is loaded. It has become.

In carrying out the present invention having the above-described configuration , specifically, the seesaw-movable pallet sliding support base (movable pallet sliding support base 10) is provided on the actual pallet supply end side as described in claim 2. An empty seesaw- movable pallet slide support base (movable pallet slide support base 10) that is configured so that the gravity acting on the picking work end side is larger than the acting gravity and the pallet is not loaded due to the difference in gravity. It can comprise so that it may return to a normal inclination attitude | position automatically from a reverse inclination attitude | position, and the seesaw-movable pallet slide support stand (movable pallet slide support base 10) is reverse inclination attitude | position as described in Claim 3. The spring-based biasing means 30 for biasing in the direction of automatically returning to the normal tilt posture can be provided.

The locking means 12 may be manually switched between a locked state and a locked release state. In this case, it is necessary to switch the locking means 12 to the locking position by human operation in a state where the slidable pallet sliding support base (movable pallet sliding support base 10) is in a position to be locked. However, as described in claim 4 , the locking means 12 is locked to a locked portion 20 provided on the seesaw-movable pallet sliding support base (movable pallet sliding support base 10). And a locking piece (first locking piece 23) that can be switched between a locking release posture and a locking release posture that detaches from the locked portion, and the locking piece (first locking piece 23) is biased to the locking posture. The locking piece (first locking piece 23) in the locking posture is locked by the seesaw-movable pallet sliding support base (movable pallet sliding support base 10). It can be configured in a shape that automatically locks to the locked portion 20 when the posture is to be achieved. Further, in this case, as described in claim 5 , the locking means 12 is provided with a second locking piece 24 for automatically locking the locking piece (first locking piece 23) in the unlocking posture. The locking piece (first locking piece 23) can be configured to return to the locking posture by an unlocking operation on the second locking piece 24.

  According to the pallet shelf equipment according to the present invention having the configuration described in claim 1 above, when the pallet slide support table freely movable by the seesaw is used for carrying out the empty pallet, the pallet slide support table freely movable by the seesaw can be used. In the state where is empty, an empty pallet is loaded on the picking work end at the lower end of the slope. At this time, since the seesaw-movable pallet slide support base is locked in a forward inclined posture in which the picking work end is the inclined lower end, the empty pallet loaded on the picking work end is in that position. Since it is stable, it is possible to easily stack empty pallets in a plurality of stages on the end of the picking operation. When the empty pallet loaded on the picking work end is moved to the actual pallet replenishment end (inclined upper end), the empty pallet sliding support base that can freely move the seesaw is released by the locking means. Push the pallet to the actual pallet supply end. Thus, when the position of the center of gravity of the empty pallet pushed out to the actual pallet replenishment end side moves from the fulcrum position of the pallet slide support stand that can freely move to the actual pallet to the actual pallet replenishment end side, the pallet slide that is freely movable by the seesaw can be moved. Since the support table automatically switches to the reverse tilted posture due to gravity, it is possible to easily push the empty pallet to the actual pallet replenishment end thereafter or automatically by gravity, and to the actual pallet replenishment end. The reached empty pallet can be stabilized by gravity at the actual pallet supply end, and there is no fear that the empty pallet slides back to the original picking work end. Therefore, even if the empty pallet that has reached the actual pallet supply end is not manually held in that position, the empty pallet supported by the actual pallet supply end can be carried out by a forklift or the like.

  Picking the shelf from the actual pallet replenishment end side of the shelf, which carries out the empty pallet unloading work using the seesaw-movable pallet sliding support base as described above, and the work of replenishing the loaded pallet with a forklift, etc. Although it can be safely performed with a forklift or the like without affecting the picking work at the work end side, when the seesaw-movable pallet slide support is not used for carrying out empty pallets, the seesaw By locking the movable pallet slide support base in a positive tilted position by the locking means, the pallet slide support base, like the other pallet slide support bases, is attached to the actual pallet supply end (inclined upper end). The replenished load pallet is slid toward the picking work end (inclined lower end), and the loading pallet It is possible to perform the picking operations.

  Therefore, according to the pallet shelf equipment of the present invention, one or a plurality of seesaw-movable pallet slide support bases are mixed in an appropriate position in a large number of pallet slide support bases arranged side by side on the shelf, Alternatively, by placing all pallet sliding support bases as slidable support bases that can freely move on a seesaw, the storage efficiency of the entire shelf is not significantly reduced, and empty pallets are transported, and the loaded pallet is replenished with a forklift. It can be used as a shelf that can be easily performed from the actual pallet replenishment end side of the shelf where work is performed. In addition, since empty flat pallet groups stacked in a plurality of stages on the picking work end side can be easily sent to the actual pallet supply end part, the empty flat pallet can be carried out efficiently.

Further , according to the configuration of the present invention , only one locking means for locking the seesaw-movable pallet slide support base in the normal inclination posture is provided as the locking means. In any case, compared to the case where locking means that can lock the seesaw-movable pallet sliding support base is required, not only the structure is simplified, but also the seesaw-movable pallet sliding support base loads the pallet. When the empty pallet slide support stand is used for unloading empty pallets, the empty pallet is unloaded from the actual pallet replenishment end. After that, there is no need to return the pallet slide support table, which can freely move the seesaw, to the original normal inclination posture, and the operability is improved. Of course, if the structure of Claim 5 is combined in this case, since the pallet slide support stand which can freely move the seesaw is automatically locked in a state of returning to the original normal inclination posture, the operability is further improved.

Further, according to the configuration of claim 2, by a very simple construction of just attaching the or weight change the position of the support shaft serving as a fulcrum of the seesaw motion, it can be inexpensively implemented, wherein According to the configuration described in Item 3 , the loading pallet that slides to the picking work end side by gravity and the empty pallet that slides to the actual pallet replenishment end side by gravity are placed on the inclined lower end of the pallet sliding support base. In order to reduce the shock received when reaching, even if the tilt angle of the tilting position of the pallet sliding support base that can freely move the seesaw is reduced, an empty seesaw movable pallet sliding support base that is not loaded with pallets is installed. It is possible to reliably return to the normal inclination posture.

According to the fourth aspect of the present invention, when the seesaw-movable pallet sliding support base is in a posture to be locked, the pallet sliding can be performed without applying a manual operation to the locking means. Since the support base can be automatically locked, the operability is improved. In this case, according to the fifth aspect of the present invention, when the locking means is released to switch the slidable pallet sliding support base capable of seesaw movement to a state in which the seesaw can be tilted to the reverse tilted posture, There is no need to manually hold the locking piece of the locking means in the unlocking posture, and the pallet sliding support base that can freely move the seesaw tilts to the reverse tilting posture whenever the locking of the locking means is released. Since it is in a ready state, the operability is further improved.

  A specific embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 to 3, reference numeral 1 denotes a pallet shelf, which is a pallet storage section 2A partitioned in a grid pattern in the horizontal direction and the vertical direction. , 2B. 3 is a conveyor for unloading, and is disposed along the pallet shelf 1 on the floor surface on the front side of the pallet shelf 1. In the illustrated pallet shelf 1, the lowermost pallet storage section 2A is configured for picking work, the middle and uppermost pallet storage sections 2B are configured for temporary storage of actual pallets, and each pallet storage section 2A, 2B is The depth is such that two pallets can be stored in series in the depth direction.

  The lowermost picking work pallet storage section 2A has both the front side of the pallet shelf 1 (the side where the unloading conveyor 3 is located) and the back side open, and inside the pallet shelf 1 at the back side open end. A pallet sliding support having a length capable of supporting two pallets in series while inclining downward from the adjacent actual pallet supply end 4a toward the picking work end 4b adjacent to the open front end of the pallet shelf 1 A stand 5 is laid. The pallet storage section 2B for temporary storage of temporary pallets in the middle and upper tiers is opened at least on the back side of the pallet shelf 1, and inside the pallet shelf 1 from the back end 6a adjacent to the open end on the front side of the pallet shelf 1. A pallet sliding support base 7 that is inclined downward toward the pallet entry / exit end 6b adjacent to the rear open end and has a length capable of supporting two pallets in series is laid.

  In the pallet shelf 1 having the above-described configuration, the actual pallet on which the load w is loaded using the forklift F on the rear side of the pallet shelf 1 with respect to the pallet storage section 2B for temporary storage of the middle pallet and the uppermost pallet. Pa can be transferred and loaded onto the pallet loading / unloading end 6b of the pallet sliding support base 7. At this time, since the pallet sliding support base 7 is inclined so that the pallet entry / exit end 6b side is lowered, the actual pallet Pa transferred onto the pallet entry / exit end 6b is the pallet entry / exit end. It is stable on 6b. Thus, the second actual pallet Pa can be stored in the temporary pallet temporary storage pallet storage section 2B in which one actual pallet Pa is stored on the pallet input / output end 6b. That is, with the actual pallet Pa supported by the forklift F, the actual pallet Pa that is stable on the pallet entry / exit end 6b is pushed into the rear end 6a side of the pallet sliding support base 7 and the actual pallet Pa supported by the forklift F is supported. Reaches the pallet entry / exit end 6b, the actual pallet Pa is lowered onto the pallet entry / exit end 6b of the pallet sliding support base 7. In this way, two actual pallets Pa can be transferred in series to the middle and uppermost actual pallet temporary storage pallet storage sections 2B, respectively.

  The actual pallet Pa stored and stored in the actual pallet temporary storage pallet storage section 2B can be delivered by the forklift F and transferred to the lowermost picking pallet storage section 2A. That is, the actual pallet Pa located on the pallet entry / exit end 6b of the pallet sliding support base 7 is lifted up by the forklift F and delivered to the rear side of the pallet shelf 1, and the actual pallet Pa is continuously removed by the forklift F. It can be transferred and loaded onto the actual pallet replenishment end 4a of the pallet sliding support base 5 in the lower pallet storage pallet storage section 2A. When two actual pallets Pa are stored and stored in the actual pallet temporary storage pallet storage section 2B, the actual pallet Pa on the pallet entry / exit end 6b has been delivered, so that the rear end 6a on the upper side of the inclination is 6a. The upper actual pallet Pa slides downward on the pallet sliding support base 7 due to gravity, and is stabilized on the pallet entry / exit end 6b.

  The actual pallet Pa transferred onto the actual pallet replenishment end 4a in the pallet sliding support base 5 of the picking work pallet storage section 2A as described above is connected to the actual pallet sliding support base 5 from the actual pallet replenishment end 4a. Since it is inclined downward toward the picking work end 4b, it slides downward on the pallet sliding support base 5 due to gravity, and is stable at the picking work end 4b adjacent to the front open end of the pallet shelf 1. To do. Accordingly, the second actual pallet Pa can be transferred onto the vacant actual pallet replenishment end portion 4a, so that two actual pallets Pa are provided for each picking work pallet storage section 2A. Can be stored and stored in series.

  The picking operator, on the front side of the pallet shelf 1, on the path between the pallet shelf 1 and the unloading conveyor 3, picking work end 4b of the pallet sliding support base 5 in the picking pallet storage section 2A. A necessary number of loads w can be picked from the actual pallet Pa supported on the pallet P and can be transferred onto the pallet P on the unloading conveyor 3. As the unloading conveyor 3, a free roller conveyor that allows a picking operator to manually move the pallet P to be supported, and various conveyors that convey the pallet P at a constant speed can be used. As a result of the picking work, when the actual pallet Pa supported on the picking work end 4b of the pallet sliding support base 5 becomes empty, the empty pallet is picked up from the picking work end 4b of the pallet sliding support base 5, At this time, when there is an actual pallet Pa supported on the actual pallet supply end 4a of the pallet sliding support base 5, the actual pallet Pa on the actual pallet supply end 4a slides downward due to gravity. Thus, the picking work end 4b is reached, so that the subsequent picking work can be continued with respect to the subsequent actual pallet Pa sent onto the picking work end 4b.

  Although the pallet shelf 1 can be used as described above, according to the present invention, all of the lowermost picking pallet storage compartments 2A, or one or more specific picking pallet storage compartments 2A are provided. As shown in FIGS. 1 and 3, the empty pallet Pb is configured to be used as an unloading section. A see-saw-movable pallet slide support (hereinafter referred to as a movable pallet slide support) 10 shown in FIG. 4 is incorporated in the dual-purpose pallet storage section 2C that is used for both carrying out the empty pallet Pb and picking.

  As shown in FIG. 4, the movable pallet sliding support base 10 is pivotally supported by the horizontal support shaft 11 near the center in the length direction so that the seesaw can move freely, and from the actual pallet supply end 4a to the picking work end 4b side. It is possible to switch between a forward inclined posture (see FIG. 4A) inclined downward and a reverse inclined posture (see FIG. 4B) inclined downward from the picking work end 4b toward the actual pallet supply end 4a. The locking means 12 is configured to lock the movable pallet sliding support base 10 in the forward inclined posture shown in FIG. 4A.

  As shown in FIGS. 5 and 6, the movable pallet sliding support base 10 is formed by connecting and integrating two rows of free roller rails 13 a and 13 b that are arranged in parallel in the left-right and right-side directions by connecting members 14 a to 14 d. It is constituted by. Each of the free roller rails 13a and 13b has a roller 16 pivotally supported between the pair of left and right side frames 15 at equal intervals in the front-rear direction, and pallet retaining vertical plates 17a and 17b projecting from both ends. It is. The free roller rails 13a and 13b of the movable pallet sliding support base 10 are placed on the floor 18 so that the free roller rails 13a and 13b are sandwiched from both the left and right sides by a pair of left and right horizontal support shafts 11 concentrically positioned. The movable pallet slide support 10 is supported around the horizontal support shaft 11 so as to be able to perform seesaw motion. Note that the movable pallet sliding support base 10 assumes the normal inclination posture shown in FIG. 4A when the ends of the free roller rails 13a and 13b on the picking work end 4b side abut on the floor surface 18 side, and the actual pallet replenishment end portion When the ends of the free roller rails 13a and 13b on the 4a side come into contact with the floor 18 side, the reverse inclined posture shown in FIG. 4B is obtained.

  As shown in FIGS. 5 to 8, the locking means 12 includes a locked portion 20 on the movable pallet sliding support base 10 side and a locking unit 21 on the floor surface 18 side. The locked portion 20 is a central position in the length direction of the connecting member 14d at the end on the picking work end 4b side among the connecting members 14a to 14d on the movable pallet sliding support base 10 side (both free roller rails 13a and 13b). It is comprised by the attachment member 20a attached to the outer side surface of the center position between. The attachment member 20a is a rod-like member having a substantially right-angled cross section and an appropriate length in the horizontal direction, and is attached to the outer surface of the connecting member 14d so that the hypotenuse is located on the lower side.

  As shown in FIG. 7 and FIG. 8, the locking unit 21 is obtained by pivotally supporting a first locking piece 23 and a second locking piece 24 on a mounting seat plate 22 fixed on the floor surface 18. The mounting seat plate 22 has a pair of left and right bearing plate portions 22a and 22b which are continuously bent upward. The first locking piece 23 includes a pair of left and right side plate portions 23b, 23c that are bent downward from both left and right sides of the tread plate portion 23a and extend toward the lower side of the end portion of the movable pallet sliding support base 10. Provided, and the front end portions of the pair of left and right side plate portions 23b and 23c are supported on the inner side of the pair of left and right bearing plate portions 22a and 22b of the mounting seat plate 22 by a common left and right horizontal support shaft 25, The upper and lower sides of the locked portion 20 (attachment member 20a) are detachably locked on the upper side of the intermediate position between the step plate portion 23a and the support shaft 25 of the pair of left and right side plate portions 23b and 23c. A claw portion 23d is formed.

  Further, when the first locking piece 23 is moved upward from the unlocking posture shown in FIG. 7B to the locking posture shown in FIG. 7A, the restraining portion 23e that contacts the mounting seat plate 22 has a pair of left and right side plates. Formed on the lower side of the tips of the portions 23b and 23c and configured to be able to swing up and down only between the locking posture shown in FIG. 7A and the locking releasing posture shown in FIG. The torsion coil spring 26 interposed between the first locking piece 23 and the mounting seat plate 22 is urged and held on the locking posture side shown in FIG. 7A. In addition, between the pair of left and right side plate portions 23b and 23c, a locked shaft 27 is installed in a horizontal direction at a position slightly away from the tread plate portion 23a toward the support shaft 25 side.

  The second locking piece 24 is disposed vertically between the pair of left and right side plate portions 23b and 23c at an intermediate position between the locked shaft 27 and the support shaft 25 of the first locking piece 23. A vertical plate-like kick plate portion 24a is provided with a pair of left and right side plate portions 24b and 24c that are bent continuously from the left and right sides of the kick plate portion 24a and extend downward, and the lower ends of the pair of left and right side plate portions 24b and 24c. The portion is supported inside the pair of left and right bearing plate portions 22a and 22b of the mounting seat plate 22 by a common left and right horizontal support shaft 28 so as to be swingable back and forth. Further, the second locking piece 24 is formed with locking claw portions 24d that can be freely engaged and disengaged with respect to the locked shaft 27 of the first locking piece 23 on the pair of left and right side plates 24b and 24c. Due to the torsion coil spring 29 that is loosely fitted to the shaft 28 and interposed between the second locking piece 24 and the mounting seat plate 22, the locking claw portion 24d is engaged with the first locking piece 23 side. It is urged forward to engage with the stop shaft 27. Thus, the locking claw portion 24d of the second locking piece 24 is twisted when the first locking piece 23 changes from the locking posture shown in FIG. 7A to the locking releasing posture shown in FIG. 7B. The second locking piece 24 swings forward by the urging force of the coil spring 29 and automatically engages with the locked shaft 27 on the first locking piece 23 side. It is comprised so that it may hold | maintain in a latching attitude | position.

  In the pallet shelf facility configured as described above, when the dual-purpose pallet storage section 2C is used as a pallet storage section for picking work, the movable pallet sliding support base 10 is switched to the normal inclination posture as shown in FIGS. 4A and 6. However, at this time, as shown in FIG. 7A, the first locking piece 23 of the locking unit 21 is engaged with the locked portion 20 (attachment member 20a) on the movable pallet sliding support base 10 side, The movable pallet sliding support base 10 is held in a normal inclination posture. That is, the first locking piece 23 is twisted into the locking posture in which the pair of left and right locking claws 23d engages the upper side of the locked portion 20 (attachment member 20a) by the biasing force of the coil spring 26. Thus, the picking work end 4b side of the movable pallet sliding support base 10 is prevented from moving up. Therefore, even if the loaded pallet Pa is transferred to the actual pallet replenishment end portion 4a on the inclined upper end side of the movable pallet sliding support base 10, the movable pallet sliding support base 10 does not tilt in the reverse inclined posture. The loaded pallet Pa on the actual pallet supply end 4a can be reliably slid by gravity toward the picking work end 4b. At this time, the second locking piece 24 is urged against the locked shaft 27 on the first locking piece 23 side by the urging force of the torsion coil spring 29, and the kick plate portion 24a (or a pair of left and right side plate portions 24b, 24c) is held in a standing posture.

  When the combined pallet storage section 2C is used as an unloading section for the empty pallet Pb, the picking work end 4b of the movable pallet sliding support base 10 held in the forward inclined posture by the locking means 12 as described above is used. The empty pallet Pb is loaded. At this time, since the movable pallet sliding support base 10 is held in a positive inclination posture in which the picking work end 4b side is inclined at the lower end, the empty pallet Pb is stable on the picking work end 4b. The empty pallets Pb can be easily stacked by the number of stages. When the stacking empty pallet Pc on the picking work end portion 4b is moved to the actual pallet replenishment end portion 4a side of the movable pallet sliding support base 10 by manual pushing work, the first locking piece in the locking posture shown in FIG. 7A is used. 23 is switched to the unlocking posture shown in FIG. 7B by an operation of twisting the step plate portion 23a against the urging force of the coil spring 26. As a result, the pair of left and right locking claws 23d of the first locking piece 23 is detached from the locked portion 20 on the movable pallet sliding support base 10 side, and the locking action on the movable pallet sliding support base 10 is released. However, the movable pallet sliding support base 10 maintains the normal inclination posture as it is due to the weight of the stacked empty pallet Pc on the picking work end 4b.

  On the other hand, when the first locking piece 23 is switched to the unlocking posture, the pair of left and right locking claws 24d of the second locking piece 24 is twisted with the torsion coil spring 29 as shown in FIG. 7B. The force automatically engages the locked shaft 27 of the first locking piece 23 and holds the first locking piece 23 in the unlocking posture, so the foot is removed from the tread plate portion 23a. However, the first locking piece 23 does not return to the original locking posture, and the pair of left and right locking claws 23d does not re-engage with the locked portion 20 on the movable pallet sliding support base 10 side.

  When the unlocking operation of the locking means 12 with respect to the first locking piece 23 is completed, the stacking empty pallet Pc on the picking work end portion 4b of the movable pallet sliding support base 10 is manually pushed and the actual pallet replenishment end on the upper side of the inclination is pushed. The center of gravity of the moving stacked pallet Pc is moved to the side of the portion 4a. The actual pallet replenishment end portion 4a is inclined upward from the position directly above the support shaft 11 which is the fulcrum of the seesaw motion of the movable pallet sliding support base 10. When moving to the side, the movable pallet slide support base 10 performs a seesaw motion around the support shaft 11 with the weight of the stacked empty pallet Pc, and switches from the normal inclination posture shown in FIG. 4A to the reverse inclination posture shown in FIG. 4B. Therefore, after that, the stacked empty pallets Pc can be slid to the actual pallet replenishment end portion 4a below the inclination by gravity, but the manual pushing operation may be continued as it is.

  When the stacking empty pallet Pc has finished moving to the actual pallet supply end 4a of the movable pallet sliding support base 10, the movable pallet sliding support base 10 has the actual pallet supply end 4a inclined at the lower end with the weight of the stacking empty pallet Pc. Therefore, the forklift F can carry out the stacked empty pallet Pc on the actual pallet supply end 4a. Although the movable pallet sliding support base 10 in the reverse inclination posture can be used as it is for the next empty pallet unloading, in this case, the empty pallet Pb is loaded on the picking work end 4b located at the upper end of the inclination, The movable pallet sliding support base 10 may be switched to the original normal inclination posture. At this time, since the first locking piece 23 of the locking means 12 is held in the unlocking posture by the second locking piece 24, the movable pallet sliding support base 10 switched to the normal tilting posture is locked. The first locking piece 23 of the means 12 is not locked.

  As shown in FIG. 7B, when the stacking empty pallets Pc are unloaded and the movable pallet sliding support base 10 is used again for picking work, that is, when the dual pallet storage section 2C is returned to the picking pallet storage section. In addition, the second locking piece 24 that locks the first locking piece 23 in the unlocking posture is twisted on the kick plate portion 24a to the front at the tip of the foot against the urging force of the coil spring 29. Push to swing forward. As a result, the locking claw 24d of the second locking piece 24 disengages from the locked shaft 27 of the first locking piece 23, and at the same time, as shown by the phantom line in FIG. It is moved up by the urging force of the torsion coil spring 26, and the restraining portion 23 e returns to the locking posture where it abuts on the mounting seat plate 22. Thereafter, when the movable pallet sliding support base 10 is returned to the original normal tilting posture by an appropriate method such as stepping on the side of the picking work end 4b of the movable pallet sliding support base 10 in the reverse inclination posture, the picking operation is performed. In the descending process on the end 4b side, the locked portion 20 (attachment member 20a) automatically engages with the locking claw portion 23d of the first locking piece 23 in the locking posture, and the movable pallet sliding support base 10 is moved. As shown in FIG. 7A, the picking work end portion 4b is locked and held by the first locking piece 23 in a state where the picking work end portion 4b has returned to the original positive tilt position located at the tilted lower end.

  Note that the movable pallet sliding support base 10 is configured to automatically swing back to the normal inclination posture in which the picking work end portion 4b is located at the lower end of the inclination when the pallet is in an empty state where no pallet is loaded. Is preferred. If comprised in this way, when the stacking empty pallet Pc is carried out from the actual pallet replenishment end part 4a of the inclination lower end of the movable pallet sliding support base 10 in a reverse inclination posture, the movable pallet sliding support base 10 is automatically set. Since the swing is restored to the normal inclination posture, the second latching piece 24 of the latching means 12 is operated after the stacked empty pallet Pc is moved onto the actual pallet replenishment end 4a, and the first latching piece 23 is operated. As long as the movable pallet sliding support 10 swinging back to the normal inclination posture can be automatically locked to the normal inclination posture as long as it is returned to the locking posture, as described above, There is no need to manually swing and return the movable pallet sliding support base 10 in the inclined posture to the normal inclined posture.

  As a concrete implementation method, the position of the support shaft 11 that pivotally supports the movable pallet sliding support base 10 so as to freely move the seesaw is determined, and the position of the center of gravity in the length direction of the movable pallet sliding support base 10 (pallet sliding direction), for example, The center position of the movable pallet sliding support base 10 in the length direction (pallet sliding direction) is set, and a weight is attached to the picking work end 4b side of the movable pallet sliding support base 10, or a virtual position is shown in FIGS. As indicated by the line, the position of the support shaft 11 that pivotally supports the movable pallet sliding support base 10 so as to freely move the seesaw is determined, and the position of the center of gravity in the length direction of the movable pallet sliding support base 10 (pallet sliding direction), for example, the movable By disposing the pallet sliding support base 10 at a position offset from the center position in the length direction (pallet sliding direction) by an appropriate distance toward the actual pallet supply end 4a. The gravity acting on the picking work end 4b side is made larger than the gravity acting on the actual pallet replenishment end 4a, and the picking work end 4b always takes a positive tilt posture with the tilted lower end due to this gravity difference. Can be configured.

  In addition to the above-described configuration using the weight and the configuration in which the position of the support shaft 11 is biased toward the actual pallet supply end portion 4a, the picking work end portion 4b is provided around the support shaft 11 on the movable pallet sliding support base 10. A configuration is also conceivable in which spring-based urging means for applying a rotational force in the descending direction is used in combination. Specifically, a biasing means for interposing a torsion coil spring around the support shaft 11 between the floor surface 18 side and the movable pallet sliding support base 10, or a picking work end of the movable pallet sliding support base 10. An urging means for interposing a tension spring between the portion 4b side and the floor surface 18, or a compression spring between the actual pallet replenishment end portion 4a side of the movable pallet sliding support base 10 and the floor surface 18. For example, an urging means can be employed.

  5 and 6 show specific examples of the urging means 30 using a compression spring. That is, the urging means 30 is provided with spring seats 31a and 31b on the inner side of the positions close to the actual pallet supply end 4a side of the left and right free roller rails 13a and 13b constituting the movable pallet sliding support base 10. Are provided, and compression coil springs 33a and 33b are interposed between the spring receiving seats 32a and 32b fixed on the floor 18 just below the spring receiving seats 31a and 31b and the spring receiving seats 31a and 31b. It is a disguise. When such a spring-based urging means is employed, the urging force of the spring is selected only when nothing is placed on the actual pallet replenishment end 4a side of the movable pallet sliding support base 10 and the picking work end. The strength is such that the movable pallet slide support 10 can be rotated around the support shaft 11 in the direction in which 4b descends.

  In addition, the configuration using the weight, the configuration in which the position of the support shaft 11 is biased toward the actual pallet replenishment end 4a, and the configuration using the spring-based biasing means include two or three of these configurations. Combinations are also possible.

It is a schematic plan view which shows a pallet shelf and the unloading conveyor. It is a schematic side view explaining the actual pallet replenishment operation and picking operation for the pallet shelf. It is a schematic side view explaining the carrying-out operation | work of the stacking empty pallet with respect to a pallet shelf. Fig. A is a schematic side view showing the movable pallet sliding support base in the forward tilt posture, and Fig. B is a schematic side view showing the movable pallet sliding support base in the reverse tilt posture. It is a top view which shows a movable pallet sliding support stand. It is a vertical side view which shows a movable pallet sliding support stand. Fig. A is a longitudinal side view of the main part showing a state in which the locking means locks the movable pallet sliding support base in a forward inclined position, and Fig. B is a movable pallet sliding support base with the locking means unlocked. FIG. 4C is a longitudinal side view of the main part showing a state immediately before the movable pallet sliding support base returns to the normal inclination posture. It is a top view of the principal part which shows a latching means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pallet shelf 2A Pallet storage section 2B for picking work Pallet storage section 2C for temporary pallet temporary storage Pallet storage section 3 Unloading conveyor 4a Actual pallet replenishment end 4b Picking work end 5,7 Pallet sliding support base 6a Actual pallet Back end 6b of pallet storage section for temporary storage Pallet entry / exit end 10 of pallet storage section for temporary storage of actual pallet Movable pallet slide support base (pallet slide support base for seesaw movement)
11, 25, 28 Horizontal support shaft 12 Locking means 13a, 13b Free roller rails 14a-14d Connecting member 18 Floor 19 Bearing member 20 Locked portion 20a Mounting member 21 Locking unit 22 Mounting seat plate 23 First locking Piece 23a Stepping plate portion 23d, 24d Locking claw portion 23e Stopping portion 24 Second locking piece 24a Kicking plate portion 26, 29 Torsion coil spring 27 Locked shaft 30 Spring-use biasing means 33a, 33b Compression coil spring F Forklift Pa Actual pallet Pb Empty pallet Pc Stacked empty pallet PL Pallet bottom level w Load

Claims (5)

A pallet in which a plurality of pallet sliding support bases that are inclined downwardly from an actual pallet replenishment end for replenishing a loaded pallet toward a picking work end and have a length capable of supporting at least two pallets in series a rack system, at least one of the pallet sliding support base, and seesaws pivotally supported, the positive slope posture actual pallet supply end is positioned in the inclined upper end, the position picking operations end in the inclined upper end In the pallet shelf equipment that is configured to be switchable to a reverse tilting posture, and is provided with locking means that can be unlocked to lock the seesaw-movable pallet slide support base at least in the normal tilting posture ,
The seesaw-movable pallet slide support base is configured to be able to be locked by the locking means only in a normal inclination posture, and automatically returns from a reverse inclination posture to a normal inclination posture in an empty state where no pallet is loaded. A pallet shelf facility that is urged in one direction . The seesaw-movable pallet slide support base is configured such that the gravity acting on the picking work end side is larger than the gravity acting on the actual pallet replenishment end side. The pallet shelf equipment according to claim 1, wherein the seesaw-movable pallet slide support base is configured to automatically return from the reverse inclination posture to the normal inclination posture . The pallet shelf equipment according to claim 2, further comprising spring-use biasing means for biasing the seesaw-movable pallet slide support table in a direction of automatically returning from a reverse tilt posture to a normal tilt posture . The locking means can be switched between a locking posture for locking to a locked portion provided on the seesaw-movable pallet sliding support base and a locking releasing posture for releasing from the locked portion. And a spring for biasing and holding the locking piece in the locking position, and the locking piece in the locking position is in a position to be locked by the seesaw-movable pallet sliding support base. The pallet shelf equipment according to any one of claims 1 to 3, wherein the pallet shelf equipment is configured to be automatically locked to the locked portion . The locking means is provided with a second locking piece for automatically locking the locking piece in an unlocking posture, and the locking piece is locked by an unlocking operation on the second locking piece. The pallet shelf installation according to claim 4 , wherein the pallet shelf installation is configured to return to

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