JP3431942B2 - Automatic pallet replacement storage device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic pallet changing / storing device for automatically changing and storing a pallet at the time of removing a part from a pallet or putting a part in the pallet.

[0002]

2. Description of the Related Art Conventionally, automatic pallet exchange / storage devices of this type are roughly classified into three types, that is, a pallet stacking system, a pallet rack storage system, and a rotary rack system, according to the difference in the pallet storage system. The pallet stacking method is, for example, as shown in FIG. 7, three stations S1 and S2.
, S3 are arranged in a line, and at the first station S1,
The first lift device b capable of ascending and descending with the plurality of real pallets a, a, ... With the parts stacked is stacked at the third station S3 with a plurality of empty pallets c, c ,. The second lift devices d capable of moving up and down in the above state are installed respectively, and the above three stations S1 to
A transfer conveyor e is provided across S3. Then, while the pallets a and c are stored in the first and third stations S1 and S3, the actual pallet a is sent from the lift device b of the first station S1 to the second station S2 through the conveyor e, After the parts are taken out from the actual pallet a at the station S2, the pallet c which has become empty is sent to the third station.

The pallet rack storage system is, for example, as shown in FIG.
, Two adjacent stations S1 and S2
One of the stations S1 is provided with a pallet storage shelf h capable of storing a plurality of pallets (actual pallets or empty pallets) g, and the other station S2.
And a traverser j that can slide laterally on the platform i.
A lift device k having Then, after the lift table i of the lift device k is raised to a predetermined height of the pallet storage shelf h, the traverser j slides from the lift table i to the pallet storage shelf h side to transfer the pallet g. . Then, the traverser j returns to the lift base i, and the lift base i which has become empty moves up and down to a predetermined stage position of the storage shelf h having the necessary pallet g, and in the same manner as before. After the pallet g is transferred from the storage rack h onto the lift table i, the pallet g is lowered to the component take-in / out position. After that, the parts are taken out or inserted from the pallet on the lift table i (traverser j). When the pallet g is carried onto the lift table i, the traverser j projects from the lift table i to the side opposite to the pallet storage shelf h, and therefore a space is required.

Further, in the rotary rack system, for example, as shown in FIG. 9, a rotary rack storage shelf for storing a plurality of pallets g, g, ... While respectively circulating in a vertical direction and storing them. n, and a traverser j that can slide laterally from a station S adjacent to the storage rack n. Then, between the rotary rack storage shelf n and the station S, one pallet g is stored, taken out, and transferred by the traverser j, and at the station S, parts are taken out from the pallet g above it or It is to insert. When the pallet g is loaded onto the station S, the traverser j projects from the station S to the side opposite to the lottery rack storage shelf n, and therefore a space is required.

[0005]

However, in the above-mentioned conventional pallet stacking system, it is necessary to arrange the three stations in a row, so that the installation space becomes large. Further, there are problems that two lift devices are required, the size of the entire device becomes large and the cost becomes high.

On the other hand, in both the pallet rack storage system and the rotary rack system, the storage space h or n is large, so that the installation space becomes large. Moreover, the size of the pallet g is significantly limited due to the size of the shelves or racks m on the shelf, and it is difficult to use it for different types of pallets. Further, the pallet g stored in the storage shelves h or n is designed to be carried out from the parts loading / unloading (unloading or inserting) station S2 or S to the outside, or from the outside to the station. There is also a problem that the loading / unloading work of the pallet g cannot be performed in parallel with the loading / unloading work of the parts from the pallet g.

The present invention has been made in view of the above points, and an object of the present invention is to drastically improve the conventional pallet stacking system to reduce the installation space, and It is intended to provide an automatic pallet changing / storing device which can reduce the size of the device, reduce the cost, use the device in common, and improve the work efficiency.

[0008]

In order to achieve the above object, the invention according to claim 1 is a storage station for accommodating a plurality of pallets in a station of an automatic pallet exchange storage device, and one pallet. It consists of only two types of parts loading and unloading stations that load and unload parts. Further, the left and right columns are connected by beam members, and the interval between the left and right columns is set to be larger than the width of the pallet. First driving means for reciprocating to and from the loading station, second driving means for raising and lowering the elevating body along the support column of the support frame, and clamps for supporting the pallet from both sides thereof supported by the elevating body. A pair of left and right clamp members, and a third drive unit that moves the clamp members in the clamp direction or the unclamp direction in synchronization with each other, and operates the first to third drive units.
First, by the pair of left and right clamp members,
Keep multiple pallets at the delivery station stacked.
Lift it up and move it to the parts loading / unloading station.
Unload onto one pallet at the loading and unloading station, then
And load all pallets at the parts loading / unloading station.
Lift it up and move it to the storage station
And finally the pallet at the top of the storage station.
Lift the unit to the parts loading / unloading station
By removing it, one of the above parts loading / unloading stations
The pallet and the top pallet of the above storage station
Configure to replace .

A second aspect of the invention is dependent on the first aspect of the invention, and is configured such that the first and second driving means, which are the constituent elements, of the chain drive type are used. That is, each of the first and second driving means includes a pair of sprockets provided at the front and rear of the moving body in the moving direction,
It has a chain that is wound between both sprockets and is partially connected to the movable body, and a drive motor that rotationally drives one of the pair of sprockets.

A third aspect of the invention is dependent on the first aspect of the invention, and is configured such that a chain drive type is used as the third drive means which is a component thereof. That is, the third drive means is a pair of sprockets provided on the left and right sides of the lifting body, a chain wound between the sprockets, and a drive motor for rotationally driving one of the pair of sprockets. And have. On the other hand, a pair of clamp members driven by the drive means are provided so as to be movable in a clamping direction or an unclamping direction along guide portions provided on the lifting body. And
Of the pair of clamp members, one clamp member is connected to the upper portion of the chain, and the other clamp member is connected to the lower portion of the chain.

The invention according to claim 4 is dependent on the invention according to claim 2, and in addition to its constituents, fall prevention means for preventing the falling of the lifting body when the chain of the second drive means is broken. Equipped with. The fall prevention means includes a plurality of stopper members provided on the support of the support frame at predetermined intervals in the height direction thereof, a tensioner member attached to the elevating body and connected to one end of the chain, A movable plate that is vertically movable on the tensioner member and has the other end of the chain connected through a rod member, a spring that biases the chain in the tension direction through the rod member, and a support for the tensioner member. It has a claw member rotatably supported via a shaft, and a link member that connects the claw member and the movable plate, and usually the claw member is located on the tensioner member side, and when the chain breaks. The movable plate moves relatively to the tensioner member via the lot member due to the biasing force of the spring, and this movement is transmitted to the pawl member via the link member to cause the pawl member to move. Rotates around the support shaft protrudes from the tensioner member side is configured to be engaged with the stopper member.

[0012]

With the above construction, in the invention according to claim 1,
When the pallet is exchanged between the storage station and the parts loading / unloading station, the support frame, the lifting body, and the pair of left and right clamp members respectively correspond to the first, second and third parts.
By the operation of the driving means, the operation is performed in the following order.

That is, first, after a pair of left and right clamp members clamp a plurality of pallets stacked on the storage station (more specifically, the bottom pallet), the elevating body rises and these pallets remain stacked. lift. Then, after the support frame moves from the storage station to the component loading / unloading station, the elevating body descends to stack a plurality of pallets on one pallet in the component loading / unloading station, and the clamp member unclamps.
Then, after the clamp member clamps all these pallets, the lifting body rises, the support frame moves from the parts loading / unloading station to the storage station, and the lifting body descends to place all the pallets on the storage station. , The clamp member unclamps. Next, after the clamp member clamps the uppermost pallet, the lifting body rises, the support frame moves to the component loading / unloading station, and the lifting body lowers to place one pallet on the component loading / unloading station. Then, the clamp member unclamps. After that, the support frame moves to the storage station. This completes the replacement of the pallets.

[0014]

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

1 to 3 show an automatic pallet changing and storing device according to an embodiment of the present invention, in which 1 is a base, and a plurality of pallets W, W, ... Are stacked on the base 1. A storage station S1 for storing the components and a component insertion station for storing the components in one empty pallet W are arranged. On the left and right sides of the base 1, a pair of traveling rails 2 and 2 having a U-shaped cross section are laid across the stations S1 and S2 and extending in the front-rear direction. In the following description, the component insertion station S2 side will be referred to as the front side, the storage station S1 side will be referred to as the rear side, and the left and right will be described when viewed from the component insertion station S2 side.

Reference numeral 3 is a support frame, and the support frame 3
Has a first support column 4 and a second support column 5 each having a square prism shape on each of the left and right sides. The first support column 4 and the second support column 5 are provided.
And are connected by a connecting member 6 at their upper ends, and both lower ends are fixed to the base member 7. The left and right first columns 4 and 4 are connected to each other by upper and lower two beam members 8 and 8 at the upper part thereof. The space between the left and right columns 4, 4 (or 5, 5) is set larger than the width of the pallet W, and the height from the lower end of the column 4 to the lower beam member 8 is the pallet. It is set larger than the height dimension of W. Therefore, the support frame 3
Is formed in a portal shape as a whole so that it can be moved forward and backward without interfering with the pallet W on the component insertion station S2.

Each of the base members 7 of the support frame 3 is provided with two front and rear wheels 9, 9 which can roll on the lower flange of the corresponding traveling rail 2. Further, a pair of front and rear sprockets 10a and 10b are provided corresponding to the front end and the rear end of each traveling rail 2, and a chain 11 is wound between the both sprockets 10a and 10b.
The chain 11 is connected to the base member 7 via a tensioner member 12. The left and right sprocket wheels 10b, 10b on the rear side are connected to each other via a shaft 13 so as to rotate synchronously, and the sprocket wheel 10b on one side (the left side) is connected via a chain type power transmission mechanism 14 or the like. The drive motor 15 is connected so that power can be transmitted. Then, the left and right sprockets 10b, 10b on the rear side are synchronously rotated by the operation of the drive motor 15, and are pulled by the left and right chains 11, 11 to store the support frame 3 along the traveling rails 2, 2. It is adapted to reciprocate between the station S1 and the component insertion station S2.
The 10b, the chain 11, the drive motor 15, and the like constitute a first drive unit 16 that moves the support frame 3.

Further, reference numeral 21 is an elevating body which is moved up and down along the support column 5 of the support frame 3, and the elevating body 21 is positioned upright near the first support columns 4 and 4 on the left and right of the support frame 3. Face 2
1a and left and right side wall portions 21b, 21b that extend substantially at right angles from both left and right edges of the upright portion 21a and are located close to the first and second support columns 4, 5. Each side wall 2
Two upper and lower guide rollers 22, 22 that can roll along the inner surface of the corresponding second support column 5 are mounted on the 1b.

On each base member 7 of the support frame 3, a sprocket 23 is rotatably mounted via a bearing member 24 at a position close to the second support column 5, and each first support frame 3 is provided. A sprocket 25 is rotatably attached to the upper portion of the column 4 via a bearing member 26. A chain 27 is wound between the two sprockets 23 and 25, and the chain 11 is formed with a pair of idlers 28a and 28b so as to extend vertically upward from the sprocket 23 on the base member side along the second support column 5. The lifting body 2 is engaged with the lifting body 2 via the tensioner member 29.
It is connected to one side surface portion 21b. The left and right sprockets 25, 25 on the side of the first support column are connected to each other via a shaft 30 so as to rotate in synchronization with each other, and the sprocket 25 on one side (the left side) has a chain type power transmission mechanism (see FIG. 1). Then, only the case 31 is shown) and the like, and the drive motor 32 is connected so as to be able to transmit power. Then, the left and right sprockets 25, 25 on the side of the first support column are synchronously rotated by the operation of the drive motor 32, and are pulled by the left and right chains 27, 27, so that the lifting body 21 is moved to the second support column 5, 5. The sprocket 23, 25, the chain 27, the drive motor 32, and the like constitute a second drive means 33 for moving the elevator 21 up and down.

Corresponding to the fact that the second drive means 33 is of the chain drive type, as shown in FIGS. 4 and 5, the supporting frame 3 prevents the lifting body 21 from falling when the chain 27 breaks. Fall prevention means 41 for preventing each of the second support columns 5 from
Is provided. The fall prevention means 41 includes a plurality of stopper members 42, 42, ... Provided at predetermined intervals in the height direction of the second support column 5, and a side surface portion 21 of the lifting body 21.
The tensioner member 29 is attached to b and one end of the chain 27 is connected by a pin 43 and the tensioner member 29 is provided so as to be vertically movable. The other end of the chain 27 is connected via a rod member 44. A movable plate 45 connected thereto, a spring 46 for biasing the chain 27 in the tension direction via the rod member 44, and a claw member 48 rotatably supported by the tensioner member 29 via a support shaft 47. , The claw member 48 and the movable plate 4
5 and a link member 49 that connects the two. Then, normally, the tension of the chain 27 resists the urging force of the spring 46 and the rod member 44 is pulled upward relative to the tensioner member 29, so that the movable plate 45 causes the first step portion 29 a of the tensioner member 29 to move. And the pawl member 48 is positioned in a state of being retracted to the tensioner member 29 side. On the other hand, when the chain 27 breaks, the movable plate 45 moves relatively downward with respect to the tensioner member 29 via the lot member 44 due to the urging force of the spring 46, and this movement causes the pawl member via the link member 49. The pawl member 48 is rotated around the support shaft 47 by being transmitted to the support shaft 48, protrudes from the tensioner member 29 side, and is locked by the stopper member 42 (state shown in FIGS. 4 and 5). When the claw member 48 projects from the tensioner member 29 side, the claw member 48 comes into contact with the second step portion 29b of the tensioner member 29 and its rotation is restricted. In FIG. 4, reference numeral 50 denotes a proximity switch attached to the tensioner member 29. When the movable plate 45 moves downward relative to the tensioner member 29 when the chain 27 breaks, the proximity switch 50 operates. The drive motor 32 of the second drive means 33 stops.

As shown in FIG.
As shown in FIG. 2, two guide portions 51, 51 extending in the left-right direction are provided on the rear surface side, and supported by the guide portions 51, 51 so as to be slidable in the longitudinal direction (left-right direction) thereof. A pair of left and right clamp members 52, 53 are provided. The respective clamp members 52, 53 are abutting portions 52a, 53a capable of abutting on the side surface of the pallet W, and project inwardly at the lower portions of the corresponding contact portions 52a, 53a, and engage with the lower surface of the pallet W. Possible claws 52b, 53b
And have. Further, as shown in FIG. 1, a mounting member 54 extending in the left-right direction is mounted on the front surface side of the upright portion 21a of the elevating body 21, and one end portion of the mounting member 54 has a bearing member 55 interposed therebetween. A sprocket 56 is rotatably provided, and a drive motor 57 is attached to the other end of the sprocket 56.
6 is drivingly connected to another sprocket 58 paired with 6. A chain 59 is placed between the two sprockets 56, 58.
One of the pair of clamp members 52 and 53 is attached to the upper portion of the chain 59 via a bracket 60, and the other clamp member 53 is attached to the lower portion of the chain. It is attached via 61. Then, the chain 59 is rotated through the sprocket 58 by the operation of the drive motor 57, and is pulled by the chain 59, whereby the left and right clamp members 52, 53 are synchronized with each other and the guide portion 51 is formed.
The pallets W are moved under the guide of the pallets W in a direction close to each other, that is, in the clamping direction or the unclamping direction of the opposite direction, and the sprocket 56, 58, the chain 59, the drive motor 57, etc. The third driving means 62 is configured to move the clamp members 52 and 53 in the clamp direction or the unclamp direction in synchronization with each other.

Next, in the automatic pallet exchange storage device of the above embodiment, the storage station S will be described with reference to FIG.
The operation when the pallet W is exchanged between 1 and the component insertion station S2 will be described.

Now, as shown in FIG. 6A, a plurality (two in the figure) of empty pallets We, are placed on the storage station S1.
Wes are stacked and stored, and one actual pallet Wf, in which the parts are already fully inserted, is placed on the part insertion station S2. The support frame 3 is a storage station S
It is located on the 1st side, the elevating body 21 is in a lowered state, and the pair of left and right clamp members 52, 53 is in an unclamped state.

From this state, first, the third driving means 62 is operated, the pair of clamp members 52 and 53 are synchronously moved in the clamp direction, and the storage station S1 is reached.
Of the lowermost pallet We from the left and right sides of the pallet We
It clamps while centering at 2,53a. afterwards,
The second drive means 33 is actuated, and the lifting / lowering body 21 is raised to lift all the pallets We and We on the storage station S1 together with the clamp members 52 and 53 in the stacked state (the state shown in FIG. 6 (b)). . Then, the first drive means 16 is operated and the support frame 3 moves from the storage station S1 to the component insertion station S2 (state shown in FIG. 6C). In the following description of the operation, the operation of the first to third drive means 16, 33, 62 will not be referred to, and only the operation of the support frame 3, the lifting body 21, and the clamp members 52, 53 will be described.

After that, the elevating body 21 descends and a plurality of empty pallets We, We are piled up on one real pallet Wf of the component insertion station S2, and the clamp members 52,
53 moves in the unclamping direction to release the clamped state, that is, unclamp (state shown in FIG. 6D). Then, after the elevating body 21 is further lowered, the clamp member 5
2, 53 clamp the bottom pallet on the component insertion station S2, that is, the actual pallet Wf.

After that, the elevating body 21 is clamped by the clamp members 52,
At 53, all the pallets Wf, We, We are lifted while being clamped (the state shown in FIG. 6E), and the supporting frame 3
From component insertion station S2 to storage station S1
6 (state shown in FIG. 6 (f)), the elevating body 21 descends and all the pallets Wf, We, We are stored in the storage station S.
1 and the clamp members 52 and 53 are unclamped (state shown in FIG. 6 (g)).

Subsequently, the elevating / lowering body 21 rises, the clamp members 52 and 53 clamp the uppermost empty pallet We, and then the elevating / lowering body 21 further rises (the state shown in FIG. 6 (h)), and the supporting frame. 3 moves to the component insertion station S2 (state shown in FIG. 6 (i)), the elevating body 21 descends and one empty pallet We is placed on the component insertion station S2, and the clamp members 52 and 53 are Unclamp (Fig. 6)
(State shown in (j)). Then, the support frame 3 moves to the storage station S1 (state shown in FIG. 6 (k)).

As described above, the replacement of the empty pallet We on the storage station S1 with the actual pallet Wf on the component insertion station S2 is completed. Then, at the parts insertion station S2, the newly replaced empty pallet We
Insertion work of the parts is performed. Further, when all the pallets stacked and stored on the storage station S1 become the actual pallets Wf in which the parts are inserted, the actual pallets Wf and Wf are carried out from the storage station to the outside by a forklift or the like. , A plurality of new empty pallets We, We are carried in from the outside.

As described above, according to the automatic pallet changing / storing device of this embodiment, the only stations required are the storing station S1 and the component inserting station S2, and the operating parts are the supporting frame 3 and the lifting body. 21 and the clamp members 52 and 53, and no large structures such as storage shelves are required. Therefore, the installation space can be reduced, and the overall structure of the device can be simplified and downsized. Also, the cost can be reduced. Moreover, although the size of the pallet W is limited in the left-right direction, the size of the pallet W is hardly limited in the front-rear direction and the vertical direction, and can be used for different types of pallets. Furthermore, during the component insertion work at the component insertion station S2, the pallet Wf can be carried out from the storage station S1 to the outside and the empty pallet We can be carried in, so that the work efficiency can be improved.

Particularly, in the case of the embodiment, the support frame 3 and the lifting body 2
1 and the clamp members 52 and 53, the three operating parts are all driven by the chain driving type driving means 16, 33 and 62, so that the device can be made smaller than a cylinder. In addition, it is possible to further reduce the cost of the device as compared with a device using a ball screw. Further, in the driving means 62 for the clamp member, the moving length of the clamp members 52, 53 can be freely set while maintaining high support rigidity, and the size of the pallet W is not limited. It has excellent versatility.

Further, in response to the use of the chain drive type as the drive means 33 for the lifting body, the fall prevention means 41 for preventing the lifting body 21 from falling when the chain 27 of the driving means 33 is broken. Since it is equipped with, it is possible to ensure safety. Moreover, the fall prevention means 41
The claw member 48 supported by the tensioner member 29 on the lifting body side projects from the tensioner member side by the urging force of the spring 46, and engages with the stopper member 42 provided on the second support column 5 of the support frame 3 at predetermined intervals. Since it is configured to be stopped, it is possible to enhance the certainty and responsiveness of the operation while achieving compactness.

The present invention is not limited to the above embodiment, but includes various other modifications.
For example, in the above-described embodiment, a case has been described in which a plurality of pallets W, W, ... Are stacked and stored in the storage station S1 and parts are placed in one empty pallet W at the part insertion station S2. According to the invention, a plurality of pallets W, W, ... Are stacked and stored in the storage station S1, and one real pallet W is stored in the parts unloading station S2.
The same can be applied to the case of taking out parts from.

[0033]

As described above, according to the automatic pallet changing / storing device of the present invention, the necessary stations are merely two, that is, the storing station and the parts loading / unloading station, and the operating parts are the supporting frame and the lifting body. Since it is only three of the clamp members and does not require large structures such as storage shelves,
The installation space can be reduced, and simplification, downsizing, and cost reduction of the entire device can be achieved. Moreover, the size of the pallet is hardly limited, and it can be used for different types of pallets. Further, the pallet can be carried in or out from the storage station during the parts loading / unloading work at the parts loading / unloading station, and the work efficiency can be improved.

In particular, according to the second aspect of the invention, since the drive means for the support frame and the drive means for the lifting body are of the chain drive type, the size and cost of the apparatus can be further reduced. be able to.

Further, according to the third aspect of the invention, since the chain drive type drive means is used as the drive means for synchronously operating the pair of left and right clamp members, the size and cost of the device can be further reduced. In addition to that, the moving length of the clamp member can be freely set while maintaining high support rigidity, which is also advantageous in terms of versatility.

Further, according to the invention described in claim 4, since the fall prevention means for preventing the falling of the lifting body when the chain of the lifting body driving means is broken is provided, safety can be ensured. . Moreover, in the fall prevention means, the claw member supported by the tensioner member on the elevating body projects from the tensioner member side by the urging force of the spring, and is locked by the stopper member provided at the support frame support columns at predetermined intervals. Since it is configured to be compact, it is possible to improve reliability and responsiveness of operation while achieving compactness.

[Brief description of drawings]

FIG. 1 is a perspective view of an automatic pallet change storage device according to an embodiment of the present invention.

FIG. 2 is a view seen from the direction A in FIG.

3 is a view seen from the direction B in FIG.

FIG. 4 is a side view showing a configuration of a fall prevention unit.

5 is a cross-sectional view taken along the line CC of FIG.

FIG. 6 is a schematic diagram for explaining a pallet replacement operation by the automatic pallet replacement storage device.

FIG. 7 is a schematic configuration diagram showing a conventional automatic pallet change storage device.

FIG. 8 is a schematic configuration diagram showing another conventional automatic pallet exchange storage device.

FIG. 9 is a schematic configuration diagram showing another conventional automatic pallet changing storage device.

[Explanation of symbols]

S1 storage station S2 parts insertion station W pallet 3 support frames 4 first support 5 Second support 8 Beam members 10a, 10b sprockets 11 chains 15 Drive motor 16 First driving means 21 Lifting body 23,25 sprockets 27 chains 29 Tensioner member 32 drive motor 33 Second drive means 41 Fall prevention means 42 Stopper member 44 Rod member 45 movable plate 46 spring 47 spindle 48 claw members 49 Link member 52,53 Clamp member 56,58 sprockets 57 Drive motor 59 chains 62 Third Driving Means

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65G 57/00-61/00

Claims (4)

(57) [Claims] 1. An automatic pallet exchange storage device comprising only two types of storage stations: a storage station for stacking and storing a plurality of pallets and a component loading / unloading station for loading and unloading components into one pallet. it connects the strut in the beam member, and the spacing between left and right struts and large set portal of the support frame than the width dimension of the pallet, the support frame between the receiving station and the part out put station First driving means for reciprocating between the first and second driving means, second driving means for raising and lowering the elevating body along the columns of the support frame, and a pair of left and right sides supported by the elevating body for clamping the pallet from both sides thereof. comprising a clamp member, by synchronizing the both clamping members and a third drive means for moving the clamping direction or an unclamping direction, the first to third driving means Is operated, the pair
First, the clamp member of the storage station
The above is done by lifting multiple pallets in the stacked state.
Move to the parts loading / unloading station and move to the parts loading / unloading station
On one pallet, and then move the parts in and out.
All pallets in the station
Lift, move to storage station, unload,
, Lift the top pallet of the storage station
Move to the parts loading / unloading station and unload
One pallet above the parts loading / unloading station
Replace with the top pallet of the storage station
An automatic pallet exchange storage device characterized by the above structure . Wherein said first and second drive means includes a pair of sprockets either provided in the longitudinal direction of movement of the movable body, wound between the sprockets, partly to be mobile The automatic pallet exchange storage device according to claim 1, further comprising a chain connected to the sprocket and a drive motor that rotationally drives one of the pair of sprockets. 3. The pair of clamp members are provided so as to be movable in a clamping direction or an unclamping direction along guide portions provided on the lifting body, and the third driving means is provided for the lifting body. A pair of sprockets provided on both left and right sides of the chain, a chain wound between the sprockets, and a drive motor for rotating one of the pair of sprockets. One of the clamp members is connected to an upper portion of the chain, and the other clamp member is connected to a lower portion of the chain.
Automatic pallet replacement storage device described. 4. A comprises a fall preventing means for preventing the dropping of the lifting body when the chain of the second drive means is broken, the fall prevention means, predetermined intervals in the height direction to the strut of the supporting frame a plurality of stopper members provided for each, attached to the lift, and the tensioner member to which one end of the chain is connected, vertically movably provided on the tensioner member, the other end of the chain a rod member A movable plate connected via the rod member, a spring for biasing the chain in the tension direction via the rod member, a pawl member rotatably supported by the tensioner member via a support shaft, and the pawl member. It has a link member for connecting to the movable plate, and normally the pawl member is located on the tensioner member side, and is movable via the lot member by the biasing force of the spring when the chain is broken. The rate moves relative to the tensioner member, and this movement is transmitted to the claw member via the link member, the claw member rotates around the support shaft, protrudes from the tensioner member side, and is locked by the stopper member. The automatic pallet exchange storage device according to claim 2, which is configured to be configured as follows.