JPH0637244B2 - Alignment device for loads on forks - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for aligning loads on a fork in a crane for stacking and discharging pipe storage equipment.

(Prior Art) Conventionally, in pipe storage equipment, storage racks are projected in multiple stages on both sides of a column, and a large number of rack rows are formed by arranging the columns, and can be hoisted and lowered along this rack row, and The crane comprises a crane girder for suspending an elevating beam so that the elevating beam can be moved over the rack row in a maximum hoisted state, and a pipe for stacking and dispensing forks provided on the elevating beam. In this conventional equipment, the equipment accuracy of the crane and rack row, the stop error of the crane and fork with respect to the rack row, the amount of bending of the columns and storage shelves due to the presence or absence of pipe loading,
The pipe receiving width on the fork is formed larger than the pipe receiving width on the storage shelf in consideration of secular change. For this reason, even a group of pipes that can be stored separately on the storage shelf in a loose state without a large gap often has a large gap between the pipes on the forks and is oblique in the rack row direction. If the pipes are scattered on the forks in this way, the entire pipes cannot be reliably delivered from the forks to the shelves, and some pipes may drop to the ground during delivery. .

Therefore, conventionally, before handing the pipe group from the fork side to the shelf side, the pipe groups are gathered by human power, or the pipes are pushed by the protrusions of the forks against the columns of the rack row and the pipe group is formed by the reaction force at that time. It was pushing towards the rear end of the forks.

(Problems to be solved by the invention) However, this is a labor-intensive work of pulling humans and is dangerous. Further, in the width-shifting work by the protrusion operation of the forks, there is an error such as a stop error of the crane with respect to the rack row, so that the skill of adjusting the amount of the protrusion of the forks required for the width-shifting is unavoidable.

The present invention has been made in order to solve such a problem, and by providing a load width aligning device on the fork side to mechanize the width aligning work, and reliably and safely deliver the load from the fork side to the shelf side. The purpose is to be able to do.

(Means for Solving the Problem) A load sizing device on a fork according to the present invention is provided with a sheath along the fork direction integrally on a side surface of a load receiving fork supporting a load, and the squeezing device is arranged in the sheath. The first locking device that inserts the fork so that it can be stowed, and locks and unlocks between the support frame and the fork-holding fork of the cargo-holding fork before and after storing the fork-holding fork The third locking device that locks between the sheath and the width-shifting forks and does not unlock unless a certain amount of moving force is applied, and the second lock device that locks or unlocks the space between the sheath and the width-shifting forks at the stored position of the width-shifting fork By providing the lock device of No. 3, the lock by the third lock device can be removed from the width-shifting fork stopped by the first lock device. The cargo receiving fork is moved forward and the load on the cargo receiving fork is moved close to each other, and then the unloaded state by the first locking device and the locking by the third locking device is maintained. The feature is that it is possible to project to the rack row side.

(Example) Hereinafter, an example in which the details are applied to a pipe storage facility will be described with reference to the drawings.

The crane girder 1 is installed so that the traveling device 2 can travel in a direction orthogonal to the rack row 3. A winch 4 is mounted on the crane girder 1, and a swing prevention guide 5 having a telescopic expansion / contraction structure is vertically provided at a lower portion of the crane girder. Further, from the crane girder 1, a wire rope 6 having one end attached to the crane girder 1 and the other end wound around a winch 4 is suspended via a sheave 7.

The elevating beam 8 is suspended from the crane girder 1 via a wire rope 6 hung on a sheave 9 provided on the elevating beam 8 and is connected to the lower end of the guide 5. Thus, the elevating beam 8 is guided by the guide 5 and hoisted down by the winch 4, and can be moved above the rack row 3 by the traveling operation of the crane girder 1 in the maximum hoisting state. On this elevating beam 8, a shuttle fork 11 for stacking or delivering the pipes P on the storage rack 10 of the rack row 3 is provided in parallel.

The shuttle fork 11 is composed of an upper fork 12, a middle fork 13, and a fixed fork 14 which serve as a receiving fork. The upper fork 12 is movably supported by the middle fork 13 via guide rollers 15 and side rollers 16. The middle fork 13 is movably supported by a fixed fork 14 via guide rollers 17 and side rollers 18. A rack 19 is provided on the lower surface of the middle fork 13.
A pinion 22 that is rotatable forward and backward by a motor 20 via a chain / sprocket mechanism 21 is engaged with the rack 19. On the other hand, the upper fork 12 has the middle fork 13
One ends of chains 25 and 26 hung on the sprockets 23 and 24 provided at both ends of the chain are fixed, and the other ends of the chains 25 and 26 are fixed to the fixed fork 14 and the middle fork 13. . Thus, two sets of fork moving devices 19
By ~ 26, the middle fork 13 projects forwards and backwards from the center position of the lifting beam 8 toward one side or the other side, and the upper fork 12 moves forward and backward in conjunction with the forward and backward movements of the middle fork 13. There is. Fork tops 27 are provided above both ends of the upper fork 12.

27 'shows a stopper for preventing the width-adjusting fork 29 described later from coming off from the sheath 28.

In such a crane having a pipe storage facility, a sheath 28 having a rectangular cross section is integrally provided on the side surface of the upper fork 12 of the shuttle fork 11, and the width-shifting forks 29 are respectively inserted at both ends of the sheath 28 so as to be stored. There is. Width fork
At the upper part of the outer end portion of 29, a width adjusting stopper 30 is provided between the fork stoppers 27 of the shuttle fork 11.

Pin insertion grooves 31, 32 are provided at the ends of the width-shifting fork 29 and the fixed fork 14 at right angles to the fork direction. Both grooves 31 and 32 correspond to the upper and lower phases at the pre-storage position where the width-shifting fork 29 is most protruded from the inside of the sheath 28. On the elevating beam 8, a fork pin 33 having a sloped surface at the upper end portion is supported via a bearing 34 so that it can be inserted between the guide grooves 31, 32. One end of the fork lock pin 33 is connected to the upper end of the link 35 via a link 36. Link
One 35 for each shuttle trough oak 11 is pivotally attached to the lifting beam 8. A lower end of the link 35 is pinned to the connecting rod 37, and a motor cylinder 38 is provided between the connecting rod 37 or the link 35 and the elevating beam 8. Thus, the forward and reverse rotation of the link 35 by the motor cylinder 38 causes the fork lock pin 33 to move into the guide groove 31,
A first locking device 39 for locking or unlocking between the fixed fork 14 and the width-shifting fork 29 of the shuttle fork 11 by inserting or withdrawing between 32 is configured.

The upper surface of the middle part of the fork is formed so as to be retracted below the upper surface of the inner end so that the width-shifting fork 29 can be vertically tilted about the inner end, and the inner upper surface of the end of the sheath 28 is open. It is formed by inclining obliquely upward. Width fork
Protrusions 40 and holes 41 are provided at the ends of 29 and sheath 28. These protrusions 40 and holes 41 correspond to the upper and lower phases so as to be engageable at the retracted position where the width-shifting forks 29 are most retracted into the sheath 28. In this way, by the locking operation by the first locking device 39, the width-shifting fork 29 that is lifted along the inner upper surface of the end portion of the sheath 28 does not hit the protrusion 40, and the sheath 28
After retracting, the protrusion 40 is inserted into the hole 41 by lowering the width-shifting fork 29 by the unlocking operation of the first locking device 39, or the protrusion 40 is pulled out by the procedure reverse to the above and the sheath 28 and the width-shifting fork 29 are separated. A second locking device 42 for locking or unlocking the

A free bear 43 is provided above the inner end of the fork to determine the pre-storage position of the width-shifting fork 29, and
A groove 44 for a free bear 43 is formed on the inner upper surface of the sheath 28. In this way, the third locking device 45 that locks between the forks 29 and the sheath 28 at the pre-storage position of the width-shifting forks 29 and does not unlock unless a moving force of a certain amount or more acts.
Is configured.

In the above structure, the width-shifting operation will be described. In the pipe loaded state in which the shuttle fork 11 is at the center of the lifting beam 8, for example, in order to shift the width to the left side in FIG. 8, the fork lock pin 33 is moved to the first lock. Bearing by locking operation of device 39
When it is pushed out while being guided by 34 and inserted into the pin insertion grooves 31, 32, the width-shifting fork 29 is locked to the fixed fork 14 side and is lifted by the inclination of the tip of the fork-lock pin 33 (Fig. 9, Fig. 9). (See Figure 9a). Then, by moving the upper forks 12 to the left side of the fork locks by the fork moving devices 19 to 26 by a constant stroke amount determined by the limit switch, the width adjusting forks 29
Are accommodated in the sheath 28, and at the same time, the scattered pipes P are gathered together by the width-shifting stopper 30 and the right fork-stopper 27 which has moved toward this (see FIG. 10). After that, when the fork lock pin 33 is pulled out from between the pin insertion grooves 31 and 32 by the unlock operation of the first locking device 39, the lifted fork fork 29 is lowered,
The protrusion 40 engages with the hole 41, and the space between the width-shifting forks 29 and the sheath 28 is locked (see FIG. 11).

Therefore, the upper fork 12 can be moved by the fork moving device while the pipe receiving width A on the upper fork 12 is reduced to B between the fork stopper 27 and the width adjusting stopper 30 (see FIG. 12).

When the compressed pipe receiving width B is smaller than the pipe receiving width C of the storage shelf 10, the pipe P group can be paid out from the fork side to the shelf side.

After such pipe shelving work, the first procedure is performed in the reverse order of the above.
After performing the locking operation of the locking device 39 and the unlocking operation of the second locking device 42, the upper fork 12 is moved to the right side together with the sheath 28 by a constant stroke amount determined by the limit switch, and then the third If the locking operation of the locking device 45 is performed, the pipe receiving width B on the fork side is expanded to A between the fork stoppers 27, and the original state where the width shifting operation is not performed is brought about.

In this state, since the pipe receiving width A on the fork side is larger than the pipe receiving width C on the shelf side, the pipe P can be taken in from the shelf side to the fork side.

The pipe width adjusting device for the forks in the crane of the pipe storage facility has been described, but it can be applied to any device for supporting a load on the forks.

(Effects of the Invention) As described above, the present invention can mechanically collect loads toward the width-shifting stopper with the fork stopper by using the power of the fork moving device, and this width-shifting operation can be performed on the fork side. Since it can be carried out, it is possible to safely and surely transfer the load, which is extremely effective for automation.

Further, since it is a simple and compact device, it can be manufactured at low cost and easily attached to the fork.

[Brief description of drawings]

1 is a front view showing an example in which the present invention is applied to a pipe storage facility, FIG. 2 is a side sectional view taken along line II-II of FIG. 1, and FIG.
The drawing is a partially enlarged side sectional view taken along the line III- in FIG.
5, 5 and 6 are sectional views taken along the lines IV to V, V to and VI of FIG. 3, and FIG. 7 is a perspective view showing the sheer fork and its moving device, FIG. 8 and FIG. Figure 9, Figure 10, Figure 11,
FIG. 12 is a schematic view sequentially showing the width-shifting operation, FIG. 9a is a sectional view taken along the line IXa-- of FIG. 9, and FIG. 11a is a sectional view taken along the line XIa-- of FIG. 1 ...... Crane girder, 8 ...... Lifting beam, 11 ...... Shuttle fork, 27 ...... Forkstoppa, 28 ...... Sheath, 29
...... Width adjustment fork, 30 ...... Width adjustment stopper, 31, 32 ...
… Pin insertion groove, 33… Fork pin, 34… Bearing, 35, 36… Rinse, 37… Connection rod, 38… Motor cylinder, 39… First lock device, 40… Projection,
41 ... hole, 42 ... second locking device, 43 ... free bear, 44 ... groove, 45 ... third locking device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 61-217406 (JP, A) JP 61-217407 (JP, A) JP 58-100004 (JP, A) JP 59- 57897 (JP, A) Actually open 52-139280 (JP, U) Actually open 61-105305 (JP, U) JP 60-25322 (JP, B2) JP 61-32205 (JP, B2) JP-B 63-17722 (JP, B2) JP-B 63-39494 (JP, B2) JP-B 61-39242 (JP, B2) JP-B 62-16883 (JP, B2)

Claims (1)

[Claims] 1. A sheath along a fork direction is integrally provided on a side surface of a load receiving fork for supporting a load, and the width-adjusting fork is inserted into the sheath so that the width-adjusting fork can be stored therein. Locking and unlocking between the support frame and width-shifting fork of the receiving fork at position 1
No. 3 lock device that locks between the sheath and the width-shifting forks in the pre-storage position of the width-shifting fork, and does not unlock unless a certain amount of moving force acts, and in the post-storage position of the width-shifting fork. A load shifting device for a load on a fork, comprising a second locking device for locking or unlocking between the sheath and the shifting fork.