JP3918166B2 - Pallet changer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pallet exchanging device for exchanging a pallet on which a load is placed with another pallet in a cargo handling operation using the pallet.
[0002]
[Prior art]
In a cargo handling operation using a pallet, a pallet on which a load has been placed, for example, a warehouse pallet, may be replaced with another pallet, for example, a distribution pallet. This pallet exchange is performed by a pallet exchange device. This type of conventional pallet exchange device is as shown in FIG. A pair of clamp arms c and d opposed to each other in the direction perpendicular to the turning center of the table b is provided so that at least one of the crank arms d can move in the opposed direction.
[0003]
The pallet replacement by this conventional pallet exchanging apparatus is performed as follows. That is, as shown in FIG. 1 (a), the pair of clamp arms c and d are placed in an unclamped state, and the load f placed on the exchanged pallet e is placed on the lower clamp arm c. The pallet is loaded by a forklift, and a replacement pallet g is placed on the load f. Next, the clamp arm d on the unclamp side is moved in the opposing direction to clamp the load f together with the replacement pallet g.
[0004]
Thereafter, as shown in FIG. 1 (b), the swivel b is reversed to place the replacement pallet g on the lower side, and then the clamp arm d is unclamped. As a result, as shown in FIG. 1C, the clamp arm c located on the upper side is separated from the pallet e to be replaced, so that the pallet e is removed. In this state, the load f is placed on the replacement pallet g, and the pallet g is removed together with the forklift.
[0005]
[Problems to be solved by the invention]
In the conventional pallet exchanging device, since the pair of clamp arms simply moves in the opposite direction over a predetermined stroke, the loading / unloading of the load in the unclamped state, and the placement and inversion of the pallet for replacement on the load In the subsequent removal work of the pallet for replacement, there is a problem that the above-described operations are difficult to perform because the clamp arm that is spaced upward is in the way.
[0006]
Further, in the above-described conventional apparatus, if both the exchanged pallet and the exchangeable pallet have the same configuration in which the fork of the forklift can be inserted, the replacement work is possible despite the above-described problems. However, it was not possible to wrap the load placed on the replacement pallet in a bag-like container (flexible container).
[0007]
In this state, the upper clamp arm d shown in FIG. 2 (a) is moved upward, and a bag-like container h is placed on the load f instead of the replacement pallet and clamped. FIG. 2 (b) 2c, and even if the upper clamp arm c in this state is separated from the upper surface of the load f as shown in FIG. 2C, the upper clamp arm c becomes an obstacle. This is because the bag-like container h cannot be lifted.
[0008]
The present invention has been considered in view of the above, and the pallet can be replaced more easily than the conventional one. In addition, the load placed on the pallet is wrapped in a bag-like container. It is an object of the present invention to provide a pallet exchanging device that can freely lift and move the pallet.
[0009]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, a mast is provided on a swivel base that is pivotally supported with respect to a frame, and a slide frame is slidably supported on the mast. An overhanging clamp arm is provided, and a swing arm facing the clamp arm is provided at one end of the mast so as to be swingable in a direction away from the posture facing the clamp arm. A clamp plate for holding the load was swingably provided below the clamp arm.
[0010]
[Operation]
With the clamp arm moved upward, the load placed on the replacement pallet is placed on the swing arm in a posture facing the clamp arm. A replacement pallet is placed on the load, or a bag-like container is placed on the load.
[0011]
The clamp arm is moved downward, and the load is clamped by the clamp arm from above the replacement pallet or from the upper side of the bag-like container. Next, the swivel base is turned to reverse the positions of the swing arm and the clamp arm, and the clamp arm is moved downward to separate the swing arm from the load. When replacing the pallet in this state, the replacement pallet is removed. In the case of a bag-like container, the swing arm is rotated in a direction away from the clamp arm to largely separate the swing arm from the load. In this state, the bag-like container is closed and moved upward by a crane or the like.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIG. In the figure, 1 is a base frame installed on the floor, 2 is a vertical frame standing in a gate shape on the base frame 1, and 3 is a cover fixed to the rear side of the vertical frame 2. A swivel 4 is supported on the front surface of the vertical frame 2 so as to be pivotable about a horizontal swivel axis. A ring gear 5 is provided on the inner surface of the swivel base 4, and a pinion gear 7 driven by a swivel motor 6 supported by the vertical frame 2 is engaged with the ring gear 5, and the swivel base 7 is rotated by the rotation of the pinion gear 7. 4 turns.
[0013]
A mast 8 is fixed to the front surface of the swivel base 4. The mast 8 is provided with roller guides 10, 10 facing each other on the left and right sides of the substrate 9 fixed to the swivel base 4 in the vertical direction. In addition, a pair of first cylinder brackets 11a and 11b are provided in the upper central portion of the front surface of the substrate 9, and a pair of second cylinder brackets 12a and 12b are provided in both lower side portions.
[0014]
A swing arm 13 is supported at the lower end portion of the substrate 9 so as to be pivotable in the vertical direction, and a pair of first cylinder brackets 11 a and 11 b provided on the substrate 9 is attached to the base end portion of the swing arm 13. A pair of opposed cylinder brackets 14a and 14b are provided, and each pair of brackets is connected by swing cylinders 15a and 15b. The swing arm 13 is rotated over a range that is substantially vertical from the horizontal posture to the outside of the substrate 9 by the expansion and contraction of the swing cylinders 15a and 15b.
[0015]
Reference numeral 16 denotes a slide frame supported so as to be slidable in the vertical direction with respect to the substrate 9. The slide frame 16 has left and right vertical frames 17a and 17b, and each of the vertical frames 17a and 17b. A plurality of rollers 18 are provided on the outside so as to be fitted to the roller guides 10 of the mast 8 so as to be able to roll.
[0016]
The slide frame 16 is provided with a pair of clamp arms 19a and 19b extending horizontally forward. And Each clamp arm 19a, the lower side of the 19b is supported swingably to the swinging board 20a, 20b are vertically by the front-rear direction of the intermediate of this fulcrum O _1. Moreover Each swing base 20a, the lower side of 20b, and the respective positions of the front and rear of the pivot O _1, the swing base 20a, a small clamping plate 21 from 20b is provided to freely swing in the front-rear direction. A stopper 22 regulates the swing posture of the swing table 20.
[0017]
A pair of cylinder brackets 23a and 23b facing the pair of second cylinder brackets 12a and 12b provided on the base plate 9 of the mast 8 are provided on the upper rear side of the slide frame 16, and each pair of brackets slides. Are connected by cylinders 24a and 24b. A cover 16 a is attached to the front surface of the slide frame 16.
[0018]
In the above configuration, the base frame 1 is installed on the floor surface. At this time, the leg plate 1a provided on the base frame 1 is fixed with anchor bolts as necessary. By driving the turning motor 6, the turntable 4 is turned, whereby the mast 8 is also turned, and the positions of the swing arms 13 and the clamp arms 19 a and 19 b of the slide frame 16 are reversed in the vertical direction. The slide frame 16 is slid in the direction in which the clamp arms 19a and 19b are separated from the swing arm 13 (upward) by extending the slide cylinders 24a and 24b with the clamp arms 19a and 19b on the upper side.
[0019]
Further, by extending the swing cylinders 15a and 15b in a state where the swing arm 13 is on the upper side, the swing arm 13 is swung upward until it changes from a horizontal state to a vertical state.
[0020]
Next, a description will be given of a repacking operation for replacing, for example, a pallet loaded with cement bags with a bag-like container using the pallet exchanging apparatus having the above-described configuration.
[0021]
As shown in FIG. 6A, the swing arm 13 is positioned on the lower side in the horizontal state, and the slide frame 16 is moved upward to move the clamp arms 19a, 19b upward. A cement bag load 26 is placed on the swing arm 13 in this state together with the exchangeable pallet 25 by a forklift. A bag-like container 27 is placed on the load 26.
[0022]
Thereafter, the slide frame 16 is slid downward to move the clamp arms 19a and 19b downward, and the load 26 together with the bag-like container 27 is pressed from above by the clamp plate 21 provided on the lower side thereof.
[0023]
Next, as shown in FIG. 6 (b), the swivel base 4 is turned and reversed, the swing arm 13 is positioned on the upper side, and then the slide frame 16 is slid and clamped as shown in FIG. 7 (c). The arms 19a and 19b are moved downward. In this state, a gap is formed between the upper surface of the load 26 and the swing arm 13, and the opening of the bag-like container 27 is closed using this gap.
[0024]
Next, as shown in FIG. 7D, the swing arm 13 is swung upward. Thereby, the upper part of the load 26 is open | released. In this state, the load 26 is lifted and carried out together with the bag-like container 27 by the crane arm 28.
[0025]
In the case of pallet replacement, a replacement pallet is placed on the load 26 in place of the bag-like container in the state shown in FIG. Next, the pallet 25 for replacement is removed in the state shown in FIG. At this time, as shown in FIG. 7D, by swinging the swing arm 13 upward, the space is increased above the load 26, and the pallet 25 can be removed more easily.
[0026]
【The invention's effect】
According to the present invention, after the load is reversed, the clamp arm (swing arm) on the upper side of the load can be largely separated from the upper surface of the load, thereby making it easier to replace the pallet for the load compared to the conventional one. It can be carried out.
[0027]
In addition, when the load placed on the pallet is wrapped in a bag-like container, the clamp arm (swing arm) on the upper side of the load does not get in the way, and this load can be lifted and moved freely with the bag-like container. The pallet-sack-like container can be easily replaced.
[Brief description of the drawings]
FIGS. 1A, 1B, and 1C are explanatory views showing a pallet exchanging operation using a conventional apparatus.
FIGS. 2 (a), (b), and (c) are explanatory views showing replacement work of a pallet-sack-like container using a conventional apparatus.
FIG. 3 is a partially broken side view showing an embodiment of the present invention.
FIG. 4 is a plan view showing an embodiment of the present invention.
FIG. 5 is a partially broken front view showing an embodiment of the present invention.
FIGS. 6A and 6B are explanatory views showing a part of a replacement operation of a pallet-sack-like container using the apparatus according to the present invention.
FIGS. 7 (c) and 7 (d) are explanatory views showing a part of replacement work of a pallet-sack container using the apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base frame, 2 ... Vertical frame, 3 ... Cover, 4 ... Swing stand, 5 ... Ring gear, 6 ... Turning motor, 7 ... Pinion gear, 8 ... Mast, 9 ... Substrate, 10 ... Roller guide, 11a, 11b, 12a , 12b, 14a, 14b, 23a, 23b ... cylinder bracket, 13 ... swing arm, 15a, 15b, 24a, 24b ... cylinder, 16 ... slide frame, 17a, 17b ... vertical frame, 18 ... roller, 19a, 19b ... clamp Arm, 20a, 20b ... Swing stand, 21 ... Clamp plate, 22 ... Stopper, 25 ... Pallet, 26 ... Load, 27 ... Bag-like container, 28 ... Crane arm.

Claims (2)

A mast is provided on a swivel base that is pivotally supported with respect to the frame, a slide frame is slidably supported on the mast, a clamp arm that projects in a direction perpendicular to the slide direction is provided on the slide frame, A pallet exchanging apparatus characterized in that a swing arm facing the clamp arm is provided at one end so as to be able to swing away from a posture facing the clamp arm. 2. The pallet exchanging apparatus according to claim 1, wherein a clamp plate for holding the load is provided on the lower side of the clamp arm so as to be swingable.

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