KR102566632B1 - Forks of Stacker Crane - Google Patents

Abstract

The present invention relates to a stacker crane fork device for loading and unloading cargo (including vehicles), and more particularly, is configured so that rolling motion is possible while the rollers of the third saddle are in close contact with the guide channels of the second saddle, Blocks shaking during movement of saddles for shipping, minimizes bending displacement and rotational displacement due to the load of the payload even if the transport fork is moved forward to the designated maximum position, and is stable while minimizing concerns about failure through simplification of the structure It relates to a fork device for a stacker crane made so that it can be operated smoothly.

Description

Stacker crane fork device {Forks of Stacker Crane}

The present invention relates to a stacker crane fork device for loading and unloading cargo (including vehicles), and more particularly, is configured so that rolling motion is possible while the rollers of the third saddle are in close contact with the guide channels of the second saddle, Blocks shaking during movement of saddles for shipping, minimizes bending displacement and rotational displacement due to the load of the payload even if the transport fork is moved forward to the designated maximum position, and is stable while minimizing concerns about failure through simplification of the structure It relates to a fork device for a stacker crane made so that it can be operated smoothly.

A cargo storage warehouse system is a large-scale storage means for efficiently storing and managing large quantities of goods in a minimum space, and is widely used in large-scale logistics systems or warehouses at various industrial sites.

These cargo storage warehouse systems are roughly divided into a pallet type and a fork type according to the loading method of cargo, and the fork type is in the limelight due to the structural and operational advantages of the system.

On the other hand, in recent years, as a way to effectively solve the parking problem of explosively increasing vehicles, a cargo storage system has been actively introduced in parking lots, and a mechanical parking system that parks many vehicles in layers in a small space has the advantage of low cost and high efficiency. It is getting a favorable reception.

As shown in FIG. 1, in this fork-type cargo storage system, loading forks F are installed at regular intervals having a matrix on top of loading beams of a plurality of cargo storage racks, and each rack ( In the space between R), a stacker crane (S) is equipped with a carriage (C) as a transport device for entering and exiting, and is driven in the three-axis direction.

Accordingly, after the stacker crane (S) loaded with the cargo (W) on the carriage (C) moves to the position of the empty loading fork (F) of the rack (R), the transport fork of the fork device provided in the carriage (C) By entering horizontally toward the empty loading fork (F) and overlapping with the loading fork (F) alternately, descending and retreating, the cargo (W) is loaded into the rack (R) and stored. do.

In this series of operations, a certain code number is given to each loading fork (F) for prompt and accurate warehousing and warehousing of cargo (W), and the driving of the stacker crane (S), which is a cargo transportation means, is controlled by a computer (not shown). It proceeds automatically by being operated in conjunction with .

The fork device provided in the carriage (C) of the stacker crane (S) has a structure that can be stretched in the form of a cantilever for loading and unloading of the cargo (W) for the loading fork (F) of the rack (R). and can be found, for example, in Japanese Laid-open Utility Model Publication No. Hei 5-85953.

This technology installs a pair of fixed beams with a pinion group side by side on the bogie frame, spaced apart from each other, combines intermediate beams with a pinion group in each fixed beam, guides them with rollers, and forks in these intermediate beams. The front end beam supporting both ends of is combined and guided by the roller. The pinion group of the fixed beam is engaged with the rack provided on the intermediate beam and driven by a motor. A shuttle beam is configured so that the beams simultaneously expand and contract.

However, since this technology extends and contracts the middle beam and the tip beam by arranging a plurality of pinions in the extension direction to interlock with each other in order to lengthen the extension stroke of the shuttle beam, it can be employed in heavy cargoes, especially in parking systems. In the case of loading and unloading vehicles weighing tons, there is a high risk that the stretching action will not be smooth due to the bending moment caused by the weight of the vehicle.

That is, the middle beam is pulled out by more than 1/2 of the width of the fixed beam and the front end beam by 1/2 or more of the width of the middle beam, so the drawing out part is larger than the joint part of the two, so the extension stroke is large, while the cantilever shape is taken during extension. As a structural characteristic, not only is the bearing capacity for the load of the cargo weak, but the bending moment is large, so the frictional force of the roller increases and bending deformation is easy to occur.

Moreover, even though each beam consists of a pair that is separated and spaced apart, only one beam is gear-driven by a motor, so there is a high risk of trouble in the stretching operation and a higher risk of overloading the motor than necessary.

In order to solve this problem, the applicant of the present invention has proposed a solution in registered Korean Patent Registration No. 10-0726080 "Stacker Crane Carriage".

Referring to FIGS. 2 and 3, the technology proposed by the present applicant in the related art includes a base frame 10 and horizontally moving first saddles 20, second saddles 30, and third saddles 40, And, it is configured to include a transport fork 50 fixed to the top of the third saddle 40 to load cargo and a drive means 60 for moving the saddle.

At this time, the third saddle 40, which supports and moves while supporting the loaded cargo on the upper portion including the actual transport fork 50, has a structure including a plurality of rollers 41 installed at a distance, and the roller 41 is the second saddle ( 30) has a structure in which it is inserted into the guide channel 33 and moves by rolling.

However, the conventional roller 41 has a structure located on the same axis with a simple gap, and there is no choice but to shake for loading the cargo due to the positional gap between the guide channel 33 of the second saddle 30.

In order to prevent this, the present applicant, in another embodiment, the present applicant is a technology provided with a roller unit that rolls the third saddle 40 in close contact with the guide channel 33 of the second saddle 30 elastically. has been presented as an example (see FIG. 3).

The conventional third saddle 40 has at least two spaced apart plungers 84 vertically upward and has a main roller at both ends in rolling contact with the bottom surface of the guide channel 33 of the second saddle 30. It has a lower body 82 having a lower body 83 and a plurality of cylinders 87 into which the plungers 84 of the lower body 82 are inserted vertically downward, and at both ends of the guide channels 33 of the second saddle, the ceiling surface. It is composed of an upper body 85 having a sub-roller 86 in rolling contact and a compression coil spring 88 accommodated in each cylinder 87 and elastically pushing the upper and lower bodies to spread apart.

This configuration allows the third saddle 40 to move while being stably attached to the guide channel 33 of the second saddle 30, so that the cargo W can be transported more stably.

However, the third saddle 40 according to the prior art has a very complicated configuration, consisting of several parts such as the above-described lower body, main roller, plunger, upper body, sub-roller, cylinder, and spring.

As there are many components like this, the spring and cylinder do not play their proper role over time, and there is a high risk of failure, and the manufacturing cost is also high.

In addition, since the spring 88 is used, there is a concern that rotational displacement may be allowed to some extent, such as distortion of the third saddle 40 relative to the second saddle 30 during operation.

Japanese Unexamined Utility Model Publication No. 5-85953 Republic of Korea Patent Registration No. 10-0726080 (2007. 05. 31. Registration)

The present invention has been made to solve the above-mentioned problems, and the rollers of the third birds are configured to allow rolling motion while being stuck in close contact with the guide channels of the second birds, thereby blocking shaking during movement of the birds for entering and leaving, Stacker crane fork device designed to minimize bending displacement and rotational displacement due to the load of the payload even when the transport fork is moved forward to the designated maximum position, as well as minimize the risk of failure through simplified structure and ensure stable and smooth operation Its purpose is to provide

In order to achieve the above object, the fork device for a stacker crane according to the present invention includes a base frame supported by a carriage of a stacker crane and mounted to a mast so as to be able to move up and down, a first saddle that moves horizontally and reciprocally on the base frame, The second birds horizontally reciprocating on the first birds, the third birds horizontally reciprocating with respect to the second birds on both sides of the second birds, and the third birds fixed to the third birds and horizontally reciprocating on the second birds Includes a carrying fork.

At this time, the third saddle is close to the inner lower surface of the guide channel with a gap on the same axis as the front roller and the front roller located close to the inner lower surface of the guide channel provided along the longitudinal direction of the second saddle, a rear roller positioned between the front roller and the rear roller, and an intermediate roller positioned closely to the inner upper surface of the guide channel; The front roller, the rear roller and the intermediate roller are characterized in that they move in the forward and backward directions by rolling motion without leaving the guide channel.

On the other hand, with respect to the third saddle movement distance (D) in which the third saddle moved forward or backward from the center of the base frame,

The length L2 of the second saddle has a length equal to or greater than the sum of the distance corresponding to 2/3 of the moving distance D of the third saddle and the length L3 of the third saddle, so that the front roller of the third saddle, The rear roller and the intermediate roller are characterized in that they do not deviate from the guide channel during movement.

In one embodiment, the height (HR) from the bottom of the front roller and the rear roller of the third saddle to the top of the intermediate roller is the same as the height (HG) from the inner lower surface to the inner upper surface of the guide channel of the second saddle. to be

In another embodiment as needed, the height (HG) from the inner lower surface of the guide channel to the inner upper surface of the second saddle is greater than the height (HR) from the lowermost part of the front and rear rollers to the uppermost part of the intermediate roller of the third saddle. It is characterized in that it is as low as the elastic limit gap (d1) of the roller.

In another embodiment as needed, the height (HR) from the lowermost part of the front roller and the rear roller of the third saddle to the uppermost part of the intermediate roller is greater than the height (HG) from the inner lower surface to the inner upper surface of the guide channel of the second saddle. It is characterized in that it is as high as the elastic limit gap (d2) of the guide channel.

On the other hand, in another embodiment as needed, the height (HG1) from the bottom to the top of the web side, which is the inside of the guide channel of the second saddle, is the height from the bottom of the front roller and rear roller of the third saddle to the top of the intermediate roller. (HR) or higher; The height (HG2) from the lowermost part to the uppermost part of the flange side outside the guide channel of the second saddle is smaller than the height (HR) from the lowermost part of the front and rear rollers of the third saddle to the uppermost part of the intermediate roller; At this time, the front roller, the rear roller and the intermediate roller of the third saddle are forcibly assembled to the guide channel, and after assembly, the displacement of the flange of the guide channel of the second saddle is characterized in that it is made within an elastic limit capable of restoring the original shape.

If necessary, the front roller, the rear roller, and the intermediate roller of the third saddle may be single or plural, respectively.

In addition, if necessary, the guide channels of the second birds further include a stopper at an end to prevent the third birds from escaping.

In addition, the transport fork includes a plurality of fork bars disposed side by side at regular intervals toward the moving direction of the saddles, and a plurality of fork bars disposed perpendicular to the fork bars to jointly support each fork bar at the center of the lower part of the fork bar at the same time, but at the top of the third saddle. It consists of a fixed single fixing beam, but is characterized in that the bottom of the base plate is joined to the top of the third saddle by providing a base plate at the bottom of the fixing beam.

And, if necessary, it is characterized in that a bed plate is provided on the upper part of the third saddle, and the lower part of both ends of the base plate is bonded to the upper part of the bed plate.

As described above, the stacker crane fork device according to the present invention has a three-stage telescopic structure and the extension length is relatively shorter than the non-extension length, so it is used for transporting and transferring cargo in a fork-type cargo storage system or a mechanical parking system. While the extension and contraction distance of the fork of the stacker crane can be sufficiently long, the extension length of each saddle is short, so that the occurrence of bending deformation and rotational deformation due to the load of the payload during extension can be suppressed as much as possible.

In addition, the 3rd saddle is forcibly fitted closely to the 2nd saddle to prevent shaking during movement of the saddle for loading and unloading, and even if the transport fork is advanced to the predetermined maximum position, bending displacement and rotation due to the load of the payload In addition to minimizing displacement, it has the effect of enabling stable and smooth operation while minimizing the risk of failure through the simplification of the structure.

In addition, even if the third saddle is forcibly adhered to the second saddle and the length of the third saddle is short, it has an effect of more reliably controlling the rotational displacement of the third saddle relative to the second saddle.

And, while the length of the third saddle is configured short, it is possible to configure the birds not to pass through the lower portion of the loading beam of the cargo storage rack by not protruding high to the top of the second saddle, thereby saving the height of the cargo loading stage ( can be reduced), so it has the effect of utilizing space, such as installing a vehicle protection plate under the loading beam of the rack.

As a result, the present invention has a very excellent effect that greatly contributes to the reliability, safety, and economic efficiency of a fork-type cargo storage system or a parking system.

1 is a view schematically showing an example of a cargo storage system using a stacker crane.
2 is a view showing a stacker crane fork device according to the prior art.
FIG. 3 is a view showing an example of third birds according to the prior art applied to FIG. 2 .
Figure 4 (a) (b) is a view showing a side elevation showing the stacker crane fork device according to the present invention.
5 is a view schematically showing the lengths of second saddles applied to the fork device of a stacker crane according to the present invention.
6 to 8 are views comparing the heights of the guide channels of the third saddle and the second saddle of the fork device of the stacker crane according to the present invention.
Figure 9 is a schematic view showing another embodiment of the third saddle of the stacker crane fork device according to the present invention.
10 is a schematic view showing a guide channel including a stopper in the fork device of a stacker crane according to the present invention.
11 and 12 are schematic views showing an embodiment of a transport fork of a fork device for a stacker crane according to the present invention.
13 is a schematic view showing an embodiment in which the saddles of the fork device of the stacker crane according to the present invention do not pass under the loading beam of the cargo storage rack.

Hereinafter, a preferred embodiment of a stacker crane fork device according to the present invention will be described in detail with reference to the accompanying drawings.

And, in the description of the present invention, a detailed description of a related known function or configuration will be omitted in order not to obscure the gist of the present invention.

On the other hand, in describing the present invention, the upper or upper part refers to a part or direction having a height from the floor where the components represented in the drawings are installed, and the lower or lower part is the opposite part or direction. do it with In addition, the longitudinal direction will be described as pointing to the same horizontal direction as the moving direction in which the birds move.

In addition, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.

On the other hand, it should be noted that the same reference numerals and symbols refer to the same components in the drawings as much as possible, even if they are displayed on different drawings.

As shown, the stacker crane fork device 1 according to the present invention is mounted on a carriage C that is mounted on a mast and moves up and down in a stacker crane S used in a fork-type cargo storage system or a parking system, and is horizontally By moving to the extension, the cargo is transported to the loading fork (F) installed on the loading beam of the cargo storage rack (see Fig. 1).

At this time, the stacker crane fork 1 according to the present invention blocks shaking during movement of birds for input and output, and even if the transport fork 50 is advanced to a predetermined maximum position, bending displacement and rotational displacement due to the load of the payload Its biggest feature is that it can not only minimize the structure, but also minimize the risk of failure through the simplification of the structure and configure it so that stable and smooth operation can be achieved.

To this end, the stacker crane fork 1 according to the present invention includes a base frame 10 supported by a carriage C of a stacker crane S and mounted movably on a mast M, and the base frame 10 ) The first saddle 20 horizontally reciprocating on the top, the second saddle 30 horizontally reciprocating on the first saddle 20, and the second saddle on both sides of the second saddle 30 ( 30), the third saddle 400 horizontally reciprocating, the transport fork 50 fixed to the third saddle 400 and horizontally reciprocating on the second saddle 30, and these birds reciprocating It consists of a driving means 60 for moving.

At this time, the structure and operation method of the base frame 10, the first saddle 20, the second saddle 30, and the driving means 60 are "Korean Registered Patent Publication No. 10-0726080" previously filed and registered by the present applicant. As supported and known through, the specific structure and operation method for these will be omitted in order not to obscure the gist of the present invention.

However, in the stacker crane fork 1 according to the present invention, even if the third saddle 400 supported by including the transport fork 50 on the upper part moves forward or backward to the maximum, the fork's bending displacement and rotational displacement are more It has a completely controllable structure.

To this end, the second saddle 30 applied to the present invention has a structure including guide channels 33 at both ends of the body along the longitudinal direction, that is, the moving direction.

In addition, the third saddle 400 does not protrude from the second saddle 30 unlike the first saddle 20 and the second saddle 30 and moves only within the guide channel 33 of the second saddle 30. It consists of a relatively small body. This is to simply function as a means for moving the transport fork 50 relative to the second saddle 30 by mounting the transport fork 50 on the third saddle 400 .

In addition, the third saddle 400 has an integrated or separate body configured to be movable along the guide channel 33 of the second saddle 30, and at least two or more spaced apart that are inserted into the guide channel 33 and move by rolling. It has a structure including a roller.

As a more specific embodiment, referring to FIGS. 4 and 6, the third saddle 400 of the present invention is the inner lower surface of the guide channel 33 provided along the longitudinal direction of the second saddle 30 ( 33b), a front roller 410 located close to the front roller 410, and a rear roller 420 located close to the inner lower surface 33b of the guide channel 33 with a gap on the same axis, It is located between the roller 410 and the rear roller 420, but has a structure including an intermediate roller 430 located in close proximity to the inner upper surface 33a of the guide channel 33.

The front roller 410, the rear roller 420, and the intermediate roller 430 of the third saddle 400 perform rolling motion without leaving the guide channel 33 of the second saddle 30, thereby driving the driving means 60. ) moves forward and backward according to the control operation.

At this time, preferably, the front roller 410, the rear roller 420, and the intermediate roller 430 of the third saddle 400 are tightly packed in the guide channel 33 of the second saddle 30 while allowing rolling motion. It is provided closely.

In other words, the front roller 410, the rear roller 420, and the intermediate roller 430 of the third saddle 400 have their uppermost and lowermost portions on the upper surface of the guide channel 33 of the second saddle 30. (33a) and the lower surface (33b) and the biggest feature is configured to be in close contact without a gap.

In one embodiment for this, the height HR from the lowermost part of the front and rear rollers of the third saddle 400 to the uppermost part of the intermediate roller is the inner lower surface 33b of the guide channel 33 of the second saddle 30 has the same height (spacing) as the height HG from to the inner upper surface 33a (see Fig. 6).

Accordingly, the rollers of the third saddle 400 perform rolling motion in a state where the upper and lower portions are tightly clamped in the guide channel 33 of the second saddle, and the bending deformation due to the load of the payload during extension can be suppressed as much as possible. In addition, even if the length of the third saddle 400 is short, the rotational displacement of the third saddle 400 with respect to the second saddle 30 is more reliably controlled to block shaking during movement of the birds for entering and leaving.

On the other hand, in describing the present invention, the front roller 410 and the rear roller 420 are named according to the position of the roller along the moving direction in which the third saddle 400 is extended, and the third saddle 400 Of course, the front roller may become the rear roller and the rear roller may become the front roller according to the left or right direction of movement.

On the other hand, referring to FIGS. 4 and 5, the stacker crane fork device 1 according to the present invention includes a base frame 10, a first saddle 20, a second saddle 30 and a third saddle 400 Since the fork has a three-stage telescopic structure and the extended length is relatively shorter than the non-elongated length, the telescopic movement distance of the stacker crane fork used for transporting and loading cargo in a fork-type cargo storage system or mechanical parking system While it can be sufficiently long, the extension length of each saddle is short, so that the occurrence of bending deformation and rotational deformation due to the load of the payload during extension can be suppressed as much as possible.

And, the length of the second saddle 30 is set so that the roller of the third saddle 400 does not deviate from the guide channel 33 of the second saddle 30 .

To this end, in the stacker crane fork device 1 according to the present invention, the third saddle 400 moves forward or backward from the center of the base frame 10, with respect to the third saddle movement distance D, the second saddle The length L2 of (30) is set in advance.

Preferably, the length L2 of the second saddle 30 has a length equal to or greater than the sum of the distance corresponding to 2/3 of the third saddle moving distance D and the length L3 of the third saddle. Accordingly, the front roller 410, the rear roller 420, and the middle roller 430 of the third saddle 400 do not deviate from the guide channel 33 during movement (see FIG. 5).

On the other hand, referring to (a) of FIG. 7 so that the rollers 410 , 420 , 430 of the third saddle 400 and the guide channels 33 of the second saddle can be positioned in close contact, the second saddle 30 The height (HG) from the inner lower surface (33b) to the inner upper surface (33a) of the guide channel (33) is higher than the height (HR) from the lowermost part of the front and rear rollers of the third saddle 400 to the uppermost part of the middle roller. It can be configured as low as the elastic limit gap (d1) of.

In addition, as shown in (b) of FIG. 7, the height HR from the lowermost part of the front roller and the rear roller of the third saddle 400 to the uppermost part of the intermediate roller is the inner lower part of the guide channel 33 of the second saddle 30 It can be configured higher than the height (HG) from the surface (33b) to the inner upper surface (33a) by the elastic limit gap (d2) of the guide channel (33).

In this embodiment, the rollers 410 , 420 , 430 of the third saddle 400 are forcibly assembled on the guide channel 33 of the second saddle 30 . At this time, in FIG. 7 (a), the elastic limit gap of the rollers As the rollers are forcibly assembled within (d1), the displacement of the rollers becomes a state in which circular recovery is possible, and in (b) of FIG. placed in a possible state.

Therefore, the rollers of the third saddle 400 perform rolling motion in a state in which the upper and lower parts are completely jammed in the guide channel 33 of the second saddle, and the occurrence of bending deformation and rotational deformation due to the load of the payload during extension is prevented. can be suppressed as much as possible.

On the other hand, in another embodiment, referring to FIG. 8 so that the rollers 410, 420, 430 of the third saddle 400 and the guide channel 33 of the second saddle can be positioned in close contact with each other, the guide channel 33 The displacement of the flange is bent within the elastic limit, so that the roller of the third saddle 400 is in close contact with the guide channel 33.

Specifically, the height (HG1) from the lowermost part to the uppermost part of the web side, which is the inside of the guide channel 33 of the second saddle 30, is from the lowermost part of the front roller and the rear roller of the third saddle 400 to the uppermost part of the intermediate roller. has a height (HR) or more of And, the height (HG2) from the lowermost part to the uppermost part of the flange side, which is the outer side of the guide channel 33 of the second saddle 30, is from the lowermost part of the front roller and the rear roller of the third saddle 400 to the uppermost part of the intermediate roller. It is configured smaller than the height (HR) (see (a) of FIG. 8).

At this time, the front roller 410, the rear roller 420, and the intermediate roller 430 of the third saddle 400 can be forcibly assembled to the guide channel 33, and the second saddle 30 is in use after assembly. The displacement of the flange of the guide channel 33 of ) is made within the elastic limit capable of restoring the original shape (see (b) in FIG. 8).

Accordingly, the rollers of the third saddles 400 are configured to allow rolling motion while being in close contact with the guide channels 33 of the second saddles, block shaking during the movement of the saddles for entering and leaving, and the transport fork 50 ) is moved forward to the designated maximum position, the bending displacement and rotational displacement due to the load of the payload are suppressed.

On the other hand, in the stacker crane fork device 1 according to the present invention, in configuring the third saddle 400, the front roller 410, the rear roller 420, and the intermediate roller 430 are selectively provided, respectively, as necessary. It can consist of multiple.

In other words, the front roller 410, the rear roller 420, and the middle roller 430 of the third saddle 400 are configured as single or plural, respectively, depending on the weight of the loaded cargo and the extended travel distance of the saddle. can (see Fig. 9).

In addition, the stacker crane fork device 1 according to the present invention has a stopper 33c at the end of the guide channel 33 so that the third saddle 400 does not escape from the guide channel 33 of the second saddle 30. ) may be further included.

For example, the aforementioned stopper 33c has a protrusion (bar) shape protruding outward from the inner end of the guide channel 33 .

In addition, of course, a sensor (not shown) detects the position of the end of the roller of the third saddle 400 as needed and automatically protrudes from the guide channel 33 when it is out of the set position.

On the other hand, the transport fork 50 applied to the stacker crane fork device 1 according to the present invention includes a plurality of fork bars 51 arranged side by side at regular intervals toward the moving direction of the birds, and a fork bar 51 ) Is arranged to be orthogonal to the fork bar 51, and each fork bar 51 is jointly supported at the lower center of the fork bar 51, but composed of a single fixing beam 52 fixed to the upper part of the third saddle 400.

And, the fork bars 51 are provided with a protruding tab (tab: 53) of an appropriate height at the lower center thereof, and are joined to the fixing beam 52 through the protruding tab 53. The protruding tab 53 secures a margin of transfer height so that the fork bar 51 passes over the fixed beam B of the loading fork F of the rack R to implement the lifting operation necessary for transferring the cargo W. (see (b) in FIG. 4).

Since the structure and embodiments of the transport fork 50 are already known, a detailed description thereof will be omitted in order not to obscure the gist of the present invention.

However, the transport fork 50 applied to the stacker crane fork device 1 of the present invention more stably fixes the beam 52 so that it can stably accommodate and support cargo according to the shape and weight of the loaded cargo. have a supporting structure.

The fixed beam 52 supports each fork bar 51 at the lower center while orthogonal to the fork bar 51 in the form of a single square tube. There is a possibility that the fixing beam 52 may shake depending on the weight.

Accordingly, it has a structure that supports the fixing beam 52 more stably.

For example, a base plate 55 may be provided under the fixing beam 52, and the lower part of the base plate 55 may be bonded to the upper part of the third saddle (Fig. 11 and Fig. 12 (a )reference).

In addition, if necessary, a structure in which a bed plate 56 is provided on the upper portion of the third saddle 400 and the lower portions of both ends of the base plate 55 are bonded to the upper portion of the bed plate 56 may have (see FIG. 12 (b)).

On the other hand, FIG. 13 shows an application embodiment of the stacker crane fork device according to the present invention, and by configuring the length of the third saddle 400 to be short, the saddle may be configured not to pass through the lower portion of the loading beam of the cargo storage rack. show

Specifically, the third saddle 400 is provided closely to the guide channel 33 of the second saddle in a structure including a front roller 410, a rear roller 420, and an intermediate roller 430, so that bending displacement and rotational displacement While it is possible to suppress to a minimum, the third saddle 400 can be configured to have a short length. At this time, the third saddle 400 may be configured to move only within the range of the guide channel 33 and not to protrude upward or forward of the second saddle 30 as compared to the prior art.

Accordingly, in the stacker crane fork device 1 of the present invention, the length of the third saddle 400 may be configured to be short while the saddle does not pass through the lower portion of the loading beam B of the cargo storage rack.

As a result, it is possible to eliminate the space (dead space) that birds have passed under the lower part of the loading beam of the rack, and as a result, it is possible to save (reduce) the height of the cargo loading stage, thereby installing a vehicle protection plate under the loading beam of the rack. etc. has the effect of utilizing space.

The present invention described above is limited to the above-described embodiment and the accompanying drawings, since various substitutions, modifications and changes are possible to those skilled in the art without departing from the technical spirit of the present invention. it is not going to be

1: Stacker crane fork device
10: base frame
20: first birds
30: second birds
33: guide channel
33a: upper surface
33b: lower surface
33c: stopper
400: 3rd birds
410: front roller
420: rear roller
430: intermediate roller

Claims (10)

A base frame (10) supported by the carriage (C) of the stacker crane (S) and movably mounted on the mast (M), and first saddles (20) reciprocating horizontally on the base frame (10); The second saddle 30 horizontally reciprocating on the first saddle 20, and the third saddle 400 horizontally reciprocating with respect to the second saddle 30 on both sides of the second saddle 30 And, in the stacker crane fork device including a transport fork 50 fixed to the third saddle 400 and horizontally reciprocating on the second saddle 30,
The third birds 400,
The front roller 410 located in close proximity to the inner lower surface 33b of the guide channel 33 provided along the longitudinal direction of the second saddle 30 and the front roller 410 are spaced on the same axis. The rear roller 420 located in close proximity to the inner lower surface 33b of the guide channel 33 and the inner upper surface of the guide channel 33 ( an intermediate roller 430 positioned closely to 33a);
The height HG1 from the lowermost part to the uppermost part of the web side, which is the inside of the guide channel 33 of the second saddle 30, is from the lowermost part of the front and rear rollers of the third saddle 400 to the uppermost part of the intermediate roller. above height (HR);
The height HG2 of the second saddle 30 from the bottom to the top of the flange side outside the guide channel 33 is from the bottom of the front and rear rollers of the third saddle 400 to the top of the intermediate roller. It is configured smaller than the height (HR),
The front roller 410, the rear roller 420, and the intermediate roller 430 of the third saddle 400 are forcibly assembled to the guide channel 33, and after assembly, the guide channel 33 of the second saddle 30 The displacement of the flange of is made within the elastic limit that can restore the original shape,
The front roller (410), the rear roller (420), and the middle roller (430) are stacker crane fork devices, characterized in that moving in the forward and backward directions by rolling motion without leaving the guide channel (33).
delete delete According to claim 1,
The height HG from the inner lower surface 33b to the inner upper surface 33a of the guide channel 33 of the second saddle 30 is,
The stacker crane fork device, characterized in that lower than the height (HR) from the bottom of the front roller and the rear roller of the third saddle (400) to the top of the intermediate roller by the elastic limit gap (d1) of the roller.
According to claim 1,
The height HR from the lowermost part of the front and rear rollers of the third saddle 400 to the uppermost part of the middle roller,
Characterized in that it is higher than the height (HG) from the inner lower surface (33b) to the inner upper surface (33a) of the guide channel (33) of the second saddle (30) by the elastic limit gap (d2) of the guide channel (33) Stacker crane fork device.
delete According to any one of claims 1, 4 or 5,
The stacker crane fork device, characterized in that the front roller 410, the rear roller 420 and the intermediate roller 430 of the third saddle 400 are single or plural, respectively.
delete According to claim 1,
The transport fork 50,
A plurality of fork bars 51 arranged side by side at regular intervals toward the moving direction of the birds, and arranged to be orthogonal to the fork bars 51, each fork bar 51 at the lower center of the fork bar 51 at the same time It is composed of a single fixing beam 52 fixed to the top of the third saddle 400 while supporting the joint,
A stacker crane fork device, characterized in that a base plate 55 is provided under the fixing beam 52, and the lower part of the base plate 55 is joined to the upper part of the third saddle.
According to claim 9,
A stacker crane fork device, characterized in that a bed plate (56) is provided on the upper portion of the third saddle (400), and lower portions of both ends of the base plate (55) are joined to the upper portion of the bed plate (56).

Images