JPH08324710A - Fork delivery device - Google Patents

Abstract

PURPOSE: To provide a low-priced link type fork delivery device whose structure is simple in the fork delivery device used for carrying articles to be stored in/from the respective racks of a rack type warehouse. CONSTITUTION: L-shaped members 3, 3 facing each other are fixed on both sides of a table 2 at a regular interval, and a stopper for stopping forward inclination and rotation in the lateral movement of a link mechanism 6 is fixed on the side edges of a plurality of link members 5, 5 along L-shaped grooves 4, 4 on both sides. A connecting shaft 7a at the lowest end is connected to both sides of a fork 10 formed between both the L-shaped members 3, 3 so as to rotate freely. A pinion connected to the rotating shaft of a motor 11 fixed on the rear end of the fork 10 engages with a rack fixed in the fore/aft direction of the table 2, and driving by the motor 11 delivers and retracts the fork 10 to/from the table 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a link-type fork sending device used for putting in and taking out stored items to and from each shelf of a shelf type warehouse having a shelf shape.

[0002]

2. Description of the Related Art Conventionally, a large warehouse having a shelf shape has been used. This shelf type warehouse is made up of a plurality of rows of shelves arranged at intervals, and in order to take in and out stored items, a traveling device that reciprocates between the shelves and after stopping this traveling device at a predetermined position, It is provided with an elevating means for elevating and lowering a delivery device for taking in and out stored items to a predetermined shelf height.

By the way, conventionally, the above-mentioned delivery device is roughly classified into two types, a fork type and a pallet type.

In the case of the fork type, a fork is inserted below a stored item installed in a shelf, and the stored item is carried and pulled out by the fork. In such a structure, it is necessary to feed out the fork by the depth of the stored item, so that a cantilever-type telescopic structure has been conventionally developed. For this reason, the structure becomes complicated and the cost increases, but there is a problem in the strength of the telescopic fork against a load.

Further, in the case of the pallet type, a pallet for storing the stored items is provided in the space of each shelf, and when the stored items are put in and out, the pallet is put in and taken out. The structure is such that the pallet is put in and taken out from the lifting device side. Therefore, the above-mentioned fork is unnecessary and the structure is relatively simple, but there is a drawback that the cost is high because a large number of pallets are required.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and uses a conventional telescopic fork or pallet type feeding device which has a complicated structure and is costly. It is an object of the present invention to provide a link type fork feeding device that is inexpensive, has a relatively simple structure, and is reliable in strength.

[0007]

In order to achieve the above-mentioned object, the fork feeding device of the present invention has an L-shaped member provided with L-shaped grooves facing each other on both sides of a table with a space between them. Rolling wheels that are provided so as to be rollable along the L-shaped grooves on both sides are coupled to the outer ends of the respective coupling shafts of the left and right link mechanisms that rotatably couple a plurality of link members. In addition, a width member for holding the left and right link mechanisms in the width direction is fixedly provided between the left and right link members, and the side edge portions of these left and right link members are provided with forward tilting rotation in lateral movement of the link mechanism. While a stopper for stopping is fixed, a lowermost connecting shaft is rotatably coupled to both sides of a fork provided between the L-shaped members on both sides, and further fixed to a rear end of the fork. The pinion connected to the rotary shaft of the installed motor and the front A rack which is fixed in the longitudinal direction of the table is characterized in that to perform the delivery and retraction of the fork by driving the motor meshes.

Further, in the backward movement of the fork provided between the L-shaped members on both sides, the rolling wheel at the lowermost end among the rolling wheels stops in the lateral groove of the L-shaped groove. preferable.

Further, in the forward movement of the fork provided between the L-shaped members on both sides, the uppermost rolling wheel of the rolling wheels is stopped in the vertical groove of the L-shaped groove. Is preferred.

Further, the forks provided between the L-shaped members on both sides are provided with left and right pawls, and a plurality of cylindrical rollers for supporting these pawls are provided in the front-rear direction of the table. Is preferred.

[0011]

In the above structure, since the rack fixed in the front-rear direction of the table and the pinion connected to the rotary shaft of the motor fixed to the rear end of the fork are meshed with each other,
When the motor is driven to rotate, the fork can be moved back and forth along the track of the rack.

The link mechanism of the present invention is provided so as to support the forks fed in the forward direction along the continuous orbit of the L-shaped grooves provided on the L-shaped members on both sides.

That is, since the fork is connected between the lowermost rolling wheels that move along the L-shaped grooves of the L-shaped members on both sides, when the fork is moved forward as described above, The rolling wheel at the lowermost end is rolled along the lateral grooves of the L-shaped grooves on both sides.

Further, since the left and right rolling wheels that move along the L-shaped grooves on both sides are rotatably connected by the link member, when the fork is sent forward, the following rolling wheels are moved in the lateral groove. The link mechanism on both sides can be sent out in the lateral direction by moving in sequence. However, since the left and right link mechanisms are stopped by the stoppers in the state of being moved in the lateral direction, the forward tilting rotation is stopped, so that the link mechanism can support the load in the forward tilting direction of the forks sent forward. .

Further, in the backward movement of the fork provided between the L-shaped members on both sides, if the rolling wheel at the lowermost end of the rolling wheels is stopped in the lateral groove of the L-shaped groove, the fork is moved forward again. In doing so, the rolling wheel at the lowermost end can surely roll along the lateral groove of the L-shaped groove.

Further, when the fork provided between the L-shaped members on both sides is moved forward, if the uppermost rolling wheel of the rolling wheels is stopped within the vertical groove of the L-shaped groove, the fork is retracted again. When moving, the uppermost rolling wheel can surely roll along the vertical groove of the L-shaped groove.

Further, since the forks are provided with left and right claws and a plurality of cylindrical rollers for supporting the claws in the front-rear direction of the table are provided, the load of the fork loaded with the stored items is supported on the table. be able to.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing a state in which the fork of the fork feeding device according to the present invention is made to stand by backward.
FIG. 2 is a side view showing a state in which the fork of FIG. 1 is fed forward. FIG. 3 is a rear view of the fork feeding device of FIG. FIG. 4 is a plan view showing a state in which the fork feeding device of FIG. 1 is looked down. FIG. 5 is a side view showing a table and a turning base of the fork feeding device of FIG. Figure 6
FIG. 6 is a front view of FIG. 5. FIG. 7 is a plan view of the table. FIG. 8 is a plan view of the turning base. FIG. 9 shows A of FIG.
It is a partial cross section figure which shows a part of cross section situation along the A line.
FIG. 10 is a partial cross-sectional view continuous with the lower side of FIG.

As shown in FIG. 1, the L-shaped member 3 is formed in an L-shape with the groove portions of the horizontal member 3a and the vertical member 3b made of channel steel facing inward. Then, as shown in FIG. 7, the L-shaped member 3 is provided on both sides of the upper surface of the rectangular flat plate-like table 2 at positions indicated by two-dot chain lines 20 and 20 shown in the figure.
By fixing the horizontal member 3a, the vertical members 3b, 3b on both sides are set in a self-supporting state with a space therebetween, as shown in FIG. With such a configuration, the L-shaped members 3 on both sides,
3, L-shaped grooves 4 forming L-shaped continuous grooves facing each other,
4 is provided.

As shown in FIG. 3, the link mechanism 6 is formed by rotatably connecting a plurality of link members 5. The link mechanism 6 shown in this figure has a total of four link members 5 staggered. Although they are arranged and connected, the number is not limited, and an appropriate number can be used in consideration of the length of each link member 5.

The lowermost link member 5 of the link members 5
a is formed longer than the other link members. This is for smoothing the operation of sending the fork 10 forward again again, with the fork 10 being pulled back to the rearmost end, the link member 5a at the lowermost end being inclined with a margin, as shown in FIG. .

Further, as shown in FIG. 3, the left and right lowermost and uppermost link members 5a and 5b hold the left and right link mechanisms 6 and 6 between the L-shaped members 3 and 3 on both sides. The width member 16 is fixed between the lowermost link members 5a and 5a and between the second link members 5 and 5 from the top.

The connecting portion of the link mechanism 6 is as shown in FIG. In this figure, the lateral member 3a of the L-shaped member 3
Is fixed to the upper surface of the end portion of the table 2 as described above, the side member 10a of the fork 10 is disposed inside thereof, and the side member 10a and the through hole 21 provided in the lowermost link member 5a are provided. The connecting shaft 7 is inserted therethrough, the bolt portion 7c provided at the inner end portion of the connecting shaft 7 is fastened with a nut 23, and the other end of the connecting shaft 7 is provided with a bearing 22 at the lowermost rolling wheel 8a. Is rotatably pivoted, and the rolling wheel 8a is rotatably fitted in the L-shaped groove 4 of the L-shaped member 3.

Further, although detailed views of the connecting portions of the other link members 5 are omitted, similar to the above-mentioned connecting portions, the connecting portions of the through holes 21 provided in the link members 5 and 5 adjacent to each other are provided. The connecting shaft 7 is inserted and fastened with a nut 23, and the respective rolling wheels 8, 8 ... Which are rotatably coupled to the outside of the link member 5 are rollable with respect to the L-shaped groove 4. It has been fitted. However, the uppermost connecting shaft 7 is connected only to the uppermost link member 5b.

As shown in FIG. 1, a stopper 9 is fixed to one side edge of each link member 5, and the link mechanism 6 is provided.
When it is made linear, if the stopper 9 is rotated further on the opposite side, the stopper 9 comes into contact with the side edge of the adjacent link member 5 to stop the rotation. Therefore, although the link mechanism 6 is rotatable relative to each other, it is possible to maintain a fixed state in a linear state with respect to the rotation on the opposite side where the stopper 9 is provided.

As shown in FIG. 4, the fork 10 is provided between the lateral members 3a and 3a of the L-shaped members 3 and 3 on both sides, and is arranged inside along the side members 10a and 10a on both sides of the fork 10. The left and right claws 14 are fixedly provided on the left and right sides, and the lateral member 25 is fixedly provided between the left and right claws 14, 14 so that the fork 10 has a predetermined width. As described above, the side members 10a and 10a on both sides of the fork 10 are provided.
The connecting shaft 7a of the link member 5a at the lowermost end is rotatably connected to the.

Further, since the motor base 26 of the electric motor 11 is fixedly mounted on the rear ends of the left and right claws 14, 14,
The width of the rear of the fork 10 can be reinforced.

The electric motor 11 has a braking function and can stop the forward and backward positions of the fork 10 at predetermined positions.

Further, as shown in FIG. 3, the electric motor 11
The sprocket 27 fixed to the rotary shaft 11a of the above and the sprocket 29 fixed to the middle of the rotary shaft 28 are connected by the chain 30, so that the rotary shaft 28 can be rotated by the drive of the electric motor 11. .

As shown in FIG. 9, both ends of the rotary shaft 28 are rotatably pivoted with respect to bearing members 31, 31 fixedly mounted on the upper surfaces of the rear ends of the left and right claws 14, 14. Axis 2
A pinion 12 is fixedly mounted on the rack 8, and the pinion 12 is meshed with a rack 13 fixedly mounted on the upper surface of the table 2 in the front-rear direction.

Further, as shown in FIG. 7, two vertical holes 32, 32 are provided on both sides in the middle of the table 2, and along the respective vertical holes 32, a plurality of cylindrical rollers 15, 15 ... It is rotatably fixed by 15a, and is rotatably arranged with the upper end of each cylindrical roller 15 protruding from the upper surface of the table 2.

The arrangement positions of the left and right cylindrical rollers 15, 15 ... Align with the left and right claws 14, 14 as shown in FIG. 9, and support these claws 14, 14 from below the table 2. Is done.

Further, by restricting the retracted position of the fork 10 as shown in FIG. 1 by the stopping operation of the electric motor 11, the rolling wheel 8a at the lowermost end is prevented from coming off the lateral groove 4a of the L-shaped groove 4. As a result, when the fork 10 is moved forward, the rolling wheel 8a at the bottom end is surely moved to the L-shaped groove
It is possible to roll along the lateral groove 4a.

Further, by restricting the forward position of the fork 10 as shown in FIG. 2 by the stopping operation of the electric motor 11, the rolling wheel 8b at the uppermost end is prevented from coming off from the vertical groove 4b of the L-shaped groove 4. . As a result, when the fork 10 is moved backward, the rolling wheel 8b at the uppermost end is surely moved to the L-shaped groove 4b.
It is possible to roll along the vertical groove 4b.

The function of the fork feeding device configured as described above will be described. By driving the electric motor 11, the pinion 12 rotates along the track of the rack 13, and the left and right claws 14 and 14 are moved to the left and right. Cylindrical roller 1
While being supported by 5, 15, ..., It can be fed forward as shown in FIG. 2 and can be pulled back backward as shown in FIG.

When the fork 10 is moved back and forth as described above, both sides of the fork 10 are rotatably connected to the lowermost connecting shafts 7a, 7a of the left and right link mechanisms 6, 6 and are connected to the outer side of the connecting shafts 7a, 7a. The rolling wheels 8, 8 are rollably fitted in the L-shaped grooves 4, 4.

Therefore, when the fork 10 is fed forward as shown in FIG. 2, the left and right lowermost rolling wheels 8a,
Left and right L with 8a supporting fork 10 from both sides
The shaped grooves 4 and 4 are rolled forward along the lateral grooves 4a and 4a.

Further, since the other rolling wheels 8, 8 ... Are rotatably connected by the link members 5, 5, .., the succeeding rolling wheels 8, 8 ... The link mechanism of is sent out in the lateral direction. The left and right link mechanisms 6, 6 are in a state in which the forward inclination of each link mechanism 6, 6 is restricted by the stoppers 9, 9 ... In the order of lateral movement, and the stored item 35 is loaded on the fork 10 sent forward. However, the load in the forward tilt direction can be supported by these link mechanisms 6. At the most forward position of the fork 10, the electric motor 11 is stopped so that at least the uppermost rolling wheel 8b remains in the vertical grooves 4b, 4b of the L-shaped member 3.

Further, as shown in FIG. 1, in order to retract the fork 10, the electric motor 11 is rotated in the opposite direction and the fork 10 is pulled back by the operation reverse to the above. In such an operation, the left and right uppermost rolling wheels 8b, 8b are positioned at the head and the vertical grooves 4b, 4b of the left and right L-shaped members 3, 3 are formed.
, Along with the other rolling wheels 8, 8 ... In such a rearmost position of the fork 10, the electric motor 11 is stopped so that at least the lowermost rolling wheel 8a remains in the lateral grooves 4a, 4a of the L-shaped member 3.

The swivel base 40 is shown in FIGS. 5, 6, 8 and the like. The swivel base 40 is provided for supporting the table 2 at its center position and for swivel movement, and does not constitute the fork delivery device of the present invention, but will be briefly described here.

A center position of the table 2 with respect to the turning table 40 is rotatably supported by a connecting shaft 41 as shown in FIG. 10, and a circle provided on the lower surface of the table 2 as shown in FIG. A ball 44 provided on the upper surface of the swivel base 40 is supported by the circumferential guide member 43,
The sprocket 42 is fixed to the lower end of the connecting shaft 41,
As shown in FIG. 9, it is connected via a chain 47 to a sprocket 46 fixed to a drive shaft 45 pivotally mounted on the end of the swivel base 40, and is not connected to the drive shaft 45. Table 2 by connecting the illustrated motor
It is designed to turn.

The reason why the table 2 is turned is that the fork 10 of the present invention is sent out in one direction, and in order to send out the fork 10 in the opposite direction, it is necessary to turn the entire table 2 by 180 °. is there.

However, it is necessary to turn the table 2 as described above when the track is fixed so that the fork sending device moves on the rail, and the traveling vehicle can change its direction freely. When this fork feeding device is mounted, such a turning device is unnecessary.

Although the apparatus for moving the table 2 in front of a predetermined shelf and the apparatus for raising and lowering the table 2 to a predetermined shelf height are omitted in the above-mentioned embodiment, these apparatuses are constituted by the conventional mechanism. can do.

[0046]

As described above, according to the fork delivery device of the present invention, it is possible to construct a fork delivery device of the link type which is reliable in terms of strength, and has a complicated structure and high cost. It is possible to provide a fork delivery device which is inexpensive and has a relatively simple structure without using the conventional telescopic fork or pallet delivery mechanism.

In the present invention, the pinion can be rotated by driving the electric motor, and the fork can be moved back and forth along the rack orbit on the table meshing with the pinion. At this time, the link mechanisms on both sides move forward. It is possible to configure a fork delivery device that supports the delivered fork and can withstand the load of stored items loaded on the fork sufficiently.

Further, when the fork is moved backward, when the lowermost rolling wheel is stopped in the lateral groove of the L-shaped groove, when the fork is moved forward again, the lowermost rolling wheel is surely L-shaped. It becomes possible to roll along the lateral groove of the shaped groove.

Further, when the fork is moved forward, if the uppermost rolling wheel is stopped in the longitudinal groove of the L-shaped groove, when the fork is moved backward again, the uppermost rolling wheel is surely moved. It becomes possible to roll along the longitudinal groove of the L-shaped groove.

Further, since the claws of the fork are supported by the plurality of cylindrical rollers, the fork can be delivered smoothly, and a sufficient supporting force can be exerted even if the load on the fork increases. .

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a fork of a fork feeding device according to the present invention is made to stand by backward.

FIG. 2 is a side view showing a state in which the fork of FIG. 1 is fed forward.

FIG. 3 is a rear view of the fork feeding device of FIG. 1.

FIG. 4 is a plan view showing a state in which the fork feeding device of FIG. 1 is looked down.

5 is a side view showing a table and a turning base of the fork feeding device of FIG. 1. FIG.

FIG. 6 is a front view of FIG.

FIG. 7 is a plan view of a table.

FIG. 8 is a plan view of a swivel base.

9 is a partial cross-sectional view showing a part of the cross-sectional state along the line AA in FIG.

FIG. 10 is a partial cross-sectional view continuous with the lower side of FIG.

[Description of sign]

 2 ... table 3 ... L-shaped member 4 ... L-shaped groove 4a ... horizontal groove 4b ... vertical groove 5 ... link member 6 ... link mechanism 7 ... connecting shaft 7a ... bottommost connecting shaft 8 ... rolling wheel 9 ... stopper 10 ... fork 11 ... Motor 11a ... Rotating shaft 12 ... Pinion 13 ... Rack 14 ... Claw 15 ... Cylindrical roller 16 ... Width member

Claims (4)

[Claims] 1. L-shaped members (3, 3) having L-shaped grooves (4, 4) facing each other on both sides of a table (2) are fixedly installed at intervals, and the L-shaped grooves on both sides are provided. Left and right link mechanisms (6) in which rolling wheels (8, 8 ...) provided rotatably along (4, 4) rotatably connect a plurality of link members (5, 5 ...). , 6) are connected to the outer ends of the respective connecting shafts (7, 7 ...) And the left and right link mechanisms (6, 6) are connected.
A width member (16) for holding in the width direction is fixedly provided between the left and right link members (5, 5), and the link mechanism (6) is provided at a side edge portion of the left and right link members (5, 5 ...). While a stopper (9) for stopping the forward tilting rotation in the lateral movement of the fork (10) is fixedly installed, it is most suitable for both sides of the fork (10) provided between the L-shaped members (3, 3) on both sides. A lower end connecting shaft (7a, 7a) is rotatably connected, and a pinion (12) connected to a rotating shaft (11a) of a motor (11) fixed to the rear end of the fork (10). It is characterized in that the rack (13) fixed in the front-rear direction of the table (2) meshes with the rack (13) to drive the motor (11) to feed and pull back the fork (10). Fork delivery device. 2. The lowermost rolling wheel (8a) of the rolling wheels (8, 8 ...) During the backward movement of the fork (10) provided between the L-shaped members (3, 3) on both sides. 2. The fork delivery device according to claim 1, wherein the fork is stopped in the lateral groove (4a) of the L-shaped groove (4). 3. In the forward movement of the fork (10) provided between the L-shaped members (3, 3) on both sides, the uppermost rolling wheel (8b) of the rolling wheels (8, 8 ...) 2. The fork delivery device according to claim 1, wherein the fork is stopped in the vertical groove (4b) of the L-shaped groove (4). 4. Left and right claws (14, 1) on the fork (10) provided between the L-shaped members (3, 3) on both sides.
4. The fork feed-out according to claim 1, further comprising a plurality of cylindrical rollers (4) provided in the front-rear direction of the table (2), the plurality of cylindrical rollers (15) respectively supporting the claws (14, 14). Equipment.