JPH0259089B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows a pallet to be transferred onto a pallet support stand provided on a transport vehicle or the like to be placed in a predetermined position in the pallet transfer direction by using a recess provided in the pallet. A pallet positioning device for positioning and fixing pallets is provided.

Hereinafter, one embodiment of the present invention will be described based on the attached illustrative drawings. In FIG. It is equipped with support stands 2a and 2b. Each of these pallet support stands 2a, 2b is
The pallet 3 can be transferred laterally to the left and right with respect to the traveling direction of the carrier, and pallet guides 4 are provided protruding from both the left and right sides of each pallet support stand 2a, 2b (both the left and right sides in the pallet transfer direction). has been done. Reference numeral 5 denotes a pallet carrying device, which supports one pallet support stand 2a of the conveyance cart 1 stopped at a predetermined position.
It is located at the position where it is connected to. Reference numeral 6 denotes a pallet unloading device, which is provided at a position connected to the other pallet support stand 2b of the conveyance cart 1 stopped at a predetermined position. In the figure, pallet loading device 5
Although the pallet unloading device 6 and the pallet unloading device 6 are arranged side by side, these devices can be arranged at any position beside the transfer path of the transport vehicle 1 on either the left or right side of the transfer path.

As shown in FIGS. 2 and 3, the pallet 3 supported by the pallet support stands 2a and 2b is oriented horizontally (direction perpendicular to the transfer direction) between both ends and the center in the transfer direction. A long rectangular through-hole 7~
9, and the illustrated pallet 3 has three load positioning recesses 10 in the transfer direction, and each recess 10
Although a box-shaped load 11 can be fitted and supported in the pallet 3, the structure for supporting the load in the pallet 3 is not limited.

The pallet carrying-in device 5 is for pushing the pallet 3 supported on a pair of left and right roller rails 12 by a pusher 13 and sending it onto the pallet support stand 2a, and the pallet carrying-out device 6 is for
The pallet 3 on the pallet support stand 2b is pulled out onto a pair of left and right roller rails 15 by a retraction dog 14 that fits into the recess 7 (or 8) of the pallet 3 on the pallet support stand 2b.
As shown in FIGS. 1 and 3, the pusher 1
3 is pivotally supported at the upper part near the tip of a movable table 18 which is supported by a guide rail 16 so as to be able to reciprocate and is driven by a cylinder/piston unit 17, and the pallet 3 is fed in the direction of the arrow 19 in FIG. This pusher 13 is pushed down and allowed to pass. Further, a seesaw movement lever 20 is installed at the pallet sending end of the pallet carrying device 5.
This seesaw movement lever 2 is supported on the front end of
Stopper 21 which is caused to move up and down by 0
is provided. Said seesaw movement lever 20
When the movable base 18 is at the backward limit position, the rear end portion is pushed down by the roller 22 pivotally supported by the movable base 18, and as a result, the stopper 21 is pushed up. Also, palette 3 is set by pusher 13.
When the movable table 18 moves forward in order to push out the pallet onto the pallet support stand 2a of the carrier 1, the seesaw motion lever 20 seesaws due to gravity or the spring used in combination, and the stopper 21 descends, allowing the pallet 3 to be pushed out. Make it familiar.

The pallet retracting dog 14 of the pallet unloading device 6 is supported on a movable base 25, which is supported in a reciprocating manner on a guide rail 23 and driven by a cylinder/piston unit 24, as shown in FIGS. 1 and 2. The first
The pallet 3 sent out in the direction of arrow 26 in the figure pushes down this dog 14 and allows it to pass.

Next, the pallet positioning device attached to the pallet support stands 2a, 2b will be explained based on FIGS. 4 to 11. In FIGS. 4 to 7,
Reference numeral 27 denotes a lateral movement table which is capable of reciprocating in a horizontal and lateral direction perpendicular to the pallet transfer direction on the pallet support stands 2a and 2b, and is supported on a fixed base 28 via a lateral movement guide rail 29. , rack gear 30
It is equipped with A pinion gear 31 meshes with the rack gear 30, and is operatively connected to a motor 33 via a speed reducer 32. The speed reducer 32 and motor 33 are supported by the fixed base 28 via a bracket 34. 35a, 3
5b is a stopper that restricts the lateral movement range of the lateral movement table 27.

Reference numeral 36 is an elevating platform supported by an elevating guide rod 37 so as to be able to rise and fall freely, and a bearing 3 is mounted on a fixed base 28.
The intermediate portion of a vertical lifting/lowering rotating shaft 39 is supported via a bearing 40 so as to be able to move up and down and rotatably. A horizontally elongated protrusion 43 formed by a pair of vertical shaft rollers 42a and 42b is provided on a rotary table 41 supported at the upper end of the elevating rotation shaft 39. 44 is the lifting platform 3
6 is a horizontally movable rack gear supported on one side of the transverse movable base 27 via a transverse movable guide rail 45.
It can freely move back and forth in the same direction. Reference numeral 46 denotes a pinion gear with a friction brake that is pivotally supported by the lifting table 36 and meshes with the rack gear 44, and a pair of bevel gears 47a and 46 are connected to the lifting rotation shaft 39.
They are interlocked and connected via 7b.

Reference numeral 48 is a cam rail for pushing up and down the lifting table that projects above the horizontal moving table 27, and pushes up the lifting table 36 via a cam driven roller 49 that is pivotally supported by the lifting table 36. 50a and 50b are the transversely movable rack gears 44 separated by an interval wider than the length of the transversely movable rack gear 44.
This is a pusher with a pair of rollers attached to the shaft, and presses and moves the horizontally movable rack gear 44.

Next, the operation of the above pallet positioning device will be explained. As shown in FIG. It rides on the lowest surface adjacent to the starting end of the cam rail 48 on the movable base 27, and therefore the elevating base 36 is at the lower limit position. Further, in this state, the laterally movable rack gear 44 is in contact with the pusher 50b. Therefore, the pair of vertical shaft rollers 42a and 42b constituting the horizontally long protrusion 43 on the rotary table 41 are at the lower limit position where they are retracted downward from the pallet support table 2a (or 2b), as shown in FIG. They are parallel to each other in a direction perpendicular to the pallet transfer direction 51 shown in FIG. In such a state, this pallet support stand 2a
(or 2b) When the pallet 3 is fed to a predetermined position by the pallet carrying device 5, the recess 9 at the center of the pallet 3 forms the oblong protrusion 43 formed by the pair of vertical shaft rollers 42a and 42b.
It will be located directly above.

Next, when the pinion gear 31 is rotated by the motor 33 and the lateral movement table 27 is laterally moved in a direction away from the stopper 35a via the rack gear 30, the pusher 50a hits the lateral movement rack gear 44 as shown in FIG. During the first outgoing stroke until the cam rail 48 contacts the cam driven roller 4, the cam rail 48
9, the lifting platform 36 is pushed up by a certain stroke. As a result, the elevating rotary shaft 39 held by the elevating table 36 is lifted up by a certain stroke, and the horizontally elongated protrusion 43 on the rotating table 41 is fitted into the central recess 9 of the pallet 3 as shown in FIGS. 8 and 9. It will match.

During the second outward stroke of the lateral movement table 27 following the first outward movement, the pusher 50a presses and moves the horizontally movable rack gear 44 of the lifting table 36, as shown in FIG. As a result, the rack gear 44
The pinion gear 46 that meshes with the rotating table 46 rotates, and this rotation is transmitted to the rotary table 41 via the pair of bevel gears 47a, 47b and the elevating rotary shaft 39, and the horizontally elongated protrusion 43 rotates together with the rotary table 41. At this time, the cam driven roller 49 of the lifting platform 36 only rolls on the same height surface of the cam rail 48, so
The lifting platform 36 is maintained at the maximum height, and the rotating platform 41
The upper oblong projection 43 is maintained at a height that fits within the central recess 9 of the pallet 3.

When the horizontally elongated protrusion 43 rotating within the central recess 9 of the pallet 3 rotates exactly 90 degrees as described above, the lateral movement table 27 moves to the stopper 35 as shown in FIG.
b, and the horizontal movement of the horizontally movable rack gear 44 is stopped. As a result, as shown in FIG.
a, 42b are lined up in the pallet transfer direction 51, so the width of the pallet center recess 9 in the pallet transfer direction 51 (the length of the short side of the rectangular recess 9) is slightly larger than the length of the horizontally long protrusion 43 in the longitudinal direction. By making it larger, the position of the pallet 3 is corrected in the transfer direction 51 by rotating the horizontally elongated protrusion 43 by 90 degrees within the recess 9. That is, the horizontally long protrusion 4 has a pair of vertical shaft rollers 42a and 42b arranged in parallel in a direction perpendicular to the pallet transfer direction 51.
As long as the pallet 3 is stopped within a range where the pallet 3 can rise and fit into the recess 9, even if the position of the pallet 3 is slightly shifted in the transfer direction 51,
By rotating the horizontally long protrusion 43 by 90 degrees within the recess 9, one of the vertical shaft rollers 42a or 42b presses one side of the recess 9 to move the pallet 3 laterally in the transfer direction 51. The pallet 3 can be fixed at a fixed position in the transfer direction 51 by correcting the positional shift.

Pallet 3 on pallet support stand 2a (or 2b)
When unloading, the pinion gear 31 is reversely rotated by the motor 33 to move the lateral movement table 27 backward to the backward limit position shown in FIG. As a result, the laterally movable rack gear 44 is pressed by the other pusher 50b and moves backward, the pinion gear 46 is reversed, and the vertically movable shaft 39, rotary table 41, and horizontally long protrusion 43 are integrally reversed by 90 degrees, and the horizontally long Projection 43
At the same time, the cam rail 48 returns from below the cam driven roller 49 to its original orientation as shown in FIGS. 4 and 5.
As a result, the lifting table 36 and the lifting rotation axis 3
9, the rotating table 41 and the oblong protrusion 43 are lowered together to the lowering limit position, and the oblong protrusion 43 exits downward from the recess 9 of the pallet 3. Therefore, the pallet 3 can be carried out from the pallet support stand 2a (or 2b).

As described above, the pallet positioning device of the present invention includes a horizontally long protrusion with both diametrical ends protruding on a rotary table that is rotatable around a vertical axis.
The rotary table is moved up and down between the upper limit position where the horizontally long protrusion protrudes above the pallet support table and the lower limit position where the horizontally long protrusion part retracts below the pallet support table, and the rotary table is moved up and down to the upper limit position. The rotary table is provided with an elevating and rotating drive means for rotating the rotary table within a range of 90 degrees in order to turn the horizontally elongated protrusion from a horizontal position to a vertical position or vice versa, and transfers the plate onto the pallet support table. The pallet is provided with a recess into which the horizontally elongated protrusion can be fitted and rotated by 90 degrees,
The width of this recess in the pallet transfer direction is large enough to regulate the position of the pallet in the transfer direction by the horizontally elongated protrusion that is fitted into the recess horizontally and then rotated 90 degrees to vertically. It is a very important thing. Therefore, according to the apparatus of the present invention, as long as the ratio of the length to the width of the horizontally long protrusion is increased and a recess corresponding to the horizontally long protrusion is provided in the pallet, the horizontally long protrusion can be formed into a pallet. As long as the pallet is within the range where it can fit upwardly into the recess of the pallet, no matter how much the pallet carried onto the pallet support table is shifted in the transfer direction, the shift in the pallet's position in the transfer direction can be reliably corrected. In addition, the pallet can be fixed in the corrected position in the transfer direction.

Furthermore, compared to a device that positions the pallet by fitting a conical positioning pin into a conical recess provided in the pallet, there is no need to deepen the recess provided in the pallet, and the horizontally elongated protrusion can be fitted into the pallet. Since it is only necessary that the recesses have the desired depth, it can also be applied to a thin plate-like pallet as shown in the figure.

Incidentally, the horizontally long protrusion can be formed by one oval protrusion, but as shown in the embodiment, the horizontally long protrusion can be formed by a pair of vertical shaft rollers that are pivotally supported at positions corresponding to both longitudinal ends of the horizontally long protrusion. In this case, even if the ratio of the length to the width of the horizontally elongated protrusion is increased, the pallet misalignment correcting action can be carried out easily and smoothly.

In addition, as shown in the embodiment, the vertical movement drive means is horizontally reciprocated by a power source (motor 33 in the embodiment), and the lateral movement table is moved during the first outgoing stroke of the transverse movement table. An elevating table that is raised by a fixed stroke via a cam provided on the moving table, supported by the elevating table so as to be horizontally reciprocating, and during a second outward stroke following the first outward stroke of the horizontal moving table, the horizontal When it is composed of a rack gear that is pressed by a pusher provided on a moving base to move laterally, and a gear transmission mechanism that rotates the rotary base that is pivotally supported on the elevating base by 90 degrees in conjunction with a pinion gear that meshes with the rack gear. The power source for raising and lowering the horizontally long protruding part and the power source for rotating the horizontally long protruding part by 90 degrees can be combined into one,
Cost reduction can be achieved compared to the case where a power source is provided separately for each. Further, since the horizontally long projecting portion can be automatically rotated by 90 degrees after being raised, control becomes simple and the desired action can be performed without malfunction.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a transport vehicle, a pallet loading device, and a pallet unloading device using the pallet positioning device of the present invention, Fig. 2 is a partially cutaway side view illustrating the pallet unloading operation, and Fig. 3 is Fig. 4 is a plan view of the pallet positioning device, Fig. 5 is a longitudinal sectional side view of the same, Fig. 6 and 7 are longitudinal sectional front views of the same main parts, 8 and 10 are longitudinal sectional side views for explaining the operation, and FIGS. 9 and 11 are plan views showing the positional relationship between the pallet recess and the horizontally long protrusion. 1... Transport truck, 2a, 2b... Pallet support stand, 3... Pallet, 4... Pallet guide, 5
...Pallet carrying-in device, 6... Pallet carrying-out device, 7-9... Rectangular through-hole, 11... Load,
12, 15... Roller rail, 13... Pusher, 14... Pallet drawing dog, 27
... Lateral movement table, 28 ... Fixed base, 29 ... Lateral movement guide rail, 30 ... Rack gear, 31 ... Pinion gear, 32 ... Speed reducer, 33 ... Motor with brake, 35a, 35b ... Stopper ,3
6... Lifting platform, 37... Lifting guide rod, 3
8, 40...bearing, 39...lifting rotation shaft, 41...
...rotating table, 42a, 42b...vertical axis roller,
43... Laterally elongated protrusion, 44... Laterally movable rack gear, 46... Pinion gear with friction brake, 4
7a, 47b...Pair of bevel gears, 48...Cam rail, 49...Cam driven roller, 50a,
50b... Pushchair with roller.

Claims (1)

[Scope of Claims] 1. A horizontally elongated protrusion whose diametrically opposite ends protrude is provided on a rotary table rotatable around a vertical axis,
The rotary table is raised and lowered between the upper limit height at which the horizontally elongated protrusion protrudes above the pallet support table and the lower limit height at which the horizontally elongated protrusion retracts below the pallet support table, and the rotary table is raised and lowered to the upper limit height. In a certain state, the rotary table is provided with an elevating and rotating drive means for rotating the rotary table within a range of 90 degrees in order to turn the horizontally long protrusion from a horizontal position to a vertical position or vice versa, and the pallet is transferred onto the pallet support table. The pallet is provided with a recess into which the horizontally elongated protrusion can be fitted and rotated 90 degrees, and the width of this recess in the pallet transfer direction is such that it can be rotated 90 degrees vertically after being fitted in the recess horizontally. A pallet positioning device having a size that allows the position of the pallet in the transfer direction to be regulated by the horizontally elongated protrusion that has been turned. 2. The device according to item 1, wherein the horizontally elongated protrusion is comprised of a pair of vertical shaft rollers pivotally supported at positions corresponding to both longitudinal ends of the horizontally elongated protrusion. 3. A horizontal movement table in which the vertical movement rotation driving means is horizontally reciprocated by a power source, and an elevator table in which the horizontal movement table is raised by a certain stroke via a cam provided on the horizontal movement table during the first forward stroke of the horizontal movement table. , a rack gear that is supported by the lifting table so as to be horizontally reciprocating and moves laterally by being pressed by a pusher provided on the lateral movement table during a second outgoing stroke of the lateral movement table following the first outgoing stroke; 3. The device according to claim 1 or 2, comprising a gear transmission mechanism that rotates the rotary table pivotally supported by the elevating table through 90 degrees in conjunction with a pinion gear meshing with the rack gear.