Pallet dewatering equipment

Abstract

To provide a pallet dewatering device capable of handling many types of pallets. [Solution] When the first trapezoidal screw 7A to the fourth trapezoidal screw 7D are rotated by the trapezoidal screw rotation motor M1, the first stopper portion 9A to the fourth stopper portion 9D move in a predetermined direction accordingly. As a result, the first stopper portion 9A to the fourth stopper portion 9D clamp the side surface of the pallet. Then, when the support portion 4 rotates in this state, the first stopper portion 9A to the fourth stopper portion 9D can restrict the pallet from moving in a direction away from the rotation direction of the pallet.

Description

[Technical Field]

[0001] The present invention relates to a pallet dewatering device. [Background technology]

[0002] BACKGROUND ART Conventionally, a pallet dewatering device is known that rotates a pallet around a vertical axis in the transport path of a transport conveyor to remove cleaning liquid and the like adhering to the pallet (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 6-52973 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-described pallet dewatering device has a problem in that it is limited in the size of the pallet and cannot accommodate a wide variety of pallets with different width and length dimensions.

[0005] In view of the above problems, an object of the present invention is to provide a pallet dewatering device that can accommodate a wide variety of pallets. [Means for solving the problem]

[0006] The above-mentioned problems can be solved by the following means. Note that the parentheses indicate reference symbols of the embodiments described below, but the present invention is not limited to these.

[0007] The pallet dewatering device according to claim 1 comprises a support part (4) for supporting a pallet (P); A screw mechanism (first trapezoidal screw 7A to fourth trapezoidal screw 7D) is provided so as to pass through the central axis (O1, O2) of the support portion (4), stopper portions (first stopper portion 9A to fourth stopper portion 9D) movably provided on the screw mechanism; a first driving means (a trapezoidal screw rotating motor M1) that rotates and drives the screw mechanism; and a second driving means for rotationally driving the support portion, When the screw mechanism is rotated by the first driving means, the stopper portion moves in a predetermined direction accordingly, thereby clamping the side surface (Pa) of the pallet, and in this state, when the support portion is rotated by the second driving means, the stopper portion can restrict the pallet from moving in a direction away from the rotation direction of the pallet.

[0008] The pallet dewatering device according to claim 2 is the pallet dewatering device (1) according to claim 1, further comprising: a connection part (coupling 10) that can connect the screw mechanism (first trapezoidal screw 7A to fourth trapezoidal screw 7D) and the first drive means (trapezoidal screw rotation motor M1); and a moving means (movable table 11, cylinder 12) that can move the connection part, The moving means moves the connection portion, and the screw mechanism and the first driving means are connected at the connection portion. When the rotational driving of the screw mechanism by the first driving means is completed, the connection portion is moved by the moving means to release the connection between the screw mechanism and the first driving means.

[0009] The pallet dewatering device according to claim 3 is the pallet dewatering device (1) according to claim 1 or 2, characterized in that it further comprises a holding portion (16) that holds down the upper surface of the pallet (P). [Effects of the Invention]

[0010] Next, the effects of the present invention will be described with reference to the drawings. Note that the reference symbols in parentheses are those of the embodiments described below, but the present invention is not limited to these.

[0011] According to the invention of claim 1, when the screw mechanism (first trapezoidal screw 7A to fourth trapezoidal screw 7D) is rotated by the first drive means (trapezoidal screw rotation motor M1), the stopper portions (first stopper portion 9A to fourth stopper portion 9D) move in a predetermined direction accordingly, whereby the stopper portions (first stopper portion 9A to fourth stopper portion 9D) clamp the side surface (Pa) of the pallet (P). In this state, when the support portion (4) is rotated by the second drive means, the stopper portions (first stopper portion 9A to fourth stopper portion 9D) can restrict movement of the pallet (P) in a direction away from the rotation direction of the pallet (P). As a result, the stopper portions (first stopper portion 9A to fourth stopper portion 9D) can remove moisture adhering to the pallet (P) by centrifugal dehydration at any position.

[0012] Therefore, the present invention can accommodate a wide variety of pallets.

[0013] According to the invention of claim 2, the moving means (movable table 11, cylinder 12) moves the connecting part (coupling 10), and the screw mechanism (first trapezoidal screw 7A to fourth trapezoidal screw 7D) and the first driving means (trapezoidal screw rotation motor M1) are connected at the connecting part (coupling 10). Then, when the first driving means finishes rotating the screw mechanism, the moving means moves the connecting part, and the screw mechanism and the first driving means are disconnected. This prevents the rotation speed of the support part (4) from slowing down due to the weight of the motor, making it impossible to remove moisture adhering to the pallet (P) by centrifugal dehydration.

[0014] According to the invention of claim 3, it is possible to prevent the pallet (P) from jumping out of the support part (4), that is, to prevent the pallet (P) from coming off in the direction of rotation. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a front view showing a pallet dewatering device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view showing the pallet dewatering device according to the embodiment. [Figure 3] 3(a) is an enlarged plan view of the X1 portion shown in FIG. 2, and FIG. 3(b) is a side view of FIG. [Figure 4] 3 is a plan view showing a part of the pallet dewatering device, showing a state in which the distance between the stopper portions is shorter than in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, one embodiment of the pallet dewatering device of the present invention will be described in detail with reference to the drawings. In the following description, up, down, left, and right directions refer to up, down, left, and right when viewed from the front of the illustration.

[0017] <Explanation of the pallet dewatering device> The pallet dewatering device according to this embodiment is capable of handling many different types of pallets. Specifically, as shown in Figure 1, the pallet dewatering device 1 comprises a frame 2 that is rectangular when viewed from the front. Also, as shown in Figure 1, a rotation mechanism 3 is attached to approximately the center of this frame 2. This rotation mechanism 3 is rotated by a motor (not shown). Note that this rotation mechanism 3 has a conventionally well-known configuration, and therefore a description thereof will be omitted.

[0018] On the other hand, as shown in FIG. 1, a tip portion 3a of the rotation mechanism 3 is attached and fixed to a support portion 4.

[0019] As shown in Fig. 2, the support unit 4 has a circular base 40 in the center that is circular in plan view. As shown in Fig. 2, a first support frame 41 that is vertically elongated in plan view is disposed on the circular base 40 at a position along a central axis O1 in the vertical direction that passes through the center point O of the circular base 40. A first fixing portion 42 that is H-shaped in plan view is attached and fixed to the first support frame 41, and the first fixing portion 42 is attached and fixed to the circular base 40 as shown in Fig. 2.

[0020] 2, a second support frame 43 having a vertically elongated rectangular shape in plan view is disposed at a position along a central axis O2 in the left-right direction that passes through the center point O of the circular base 40. A second fixing portion 44 having an H-shape in plan view is attached and fixed to the second support frame 43, and the second fixing portion 44 is attached and fixed to the circular base 40 as shown in FIG.

[0021] 2, first to fourth connecting portions 45 to 48 that connect the first support frame 41 and the second support frame 43 are attached and fixed to the first support frame 41 and the second support frame 43. As shown in FIG. 2, the first connecting portion 45 is formed in an elongated rectangular shape that is inclined diagonally downward and left, and is attached and fixed so as to connect the left side surface 41b on the upper surface 41a side of the first support frame 41 and the upper surface 43b on the left side surface 43a side of the second support frame 43. As shown in FIG. 2, the second connecting portion 46 is formed in an elongated rectangular shape that is inclined diagonally downward and right, and is attached and fixed so as to connect the left side surface 41b on the lower surface 41c side of the first support frame 41 and the lower surface 43c on the left side surface 43a side of the second support frame 43. 2, the third connecting portion 47 is formed in an elongated rectangular shape inclined diagonally upward to the right, and is attached and fixed so as to connect the right side surface 41d on the lower surface 41c side of the first support frame 41 and the lower surface 43c on the right side surface 43d side of the second support frame 43. Furthermore, the fourth connecting portion 48 is formed in an elongated rectangular shape inclined diagonally upward to the left, and is attached and fixed so as to connect the right side surface 41d on the upper surface 41a side of the first support frame 41 and the upper surface 43b on the right side surface 43d side of the second support frame 43.

[0022] Thus, the tip 3a of the rotation mechanism 3 shown in Fig. 1 is attached and fixed to the circular base 40 of the support unit 4 configured as described above. As a result, when the rotation mechanism 3 is rotated by a motor (not shown), the circular base 40 rotates, which in turn rotates the first support frame 41, the second support frame 43, and the first connecting portion 45 to the fourth connecting portion 48 shown in Fig. 2. Therefore, the support unit 4 rotates due to the rotation of the rotation mechanism 3.

[0023] 1 is placed on the upper surface of the support portion 4, that is, on the upper surfaces of the first support frame 41, the second support frame 43, and the first connecting portion 45 to the fourth connecting portion 48 shown in Fig. 2. This pallet P is placed on the upper surface of the support portion 4 by the robot hand R shown in Fig. 1.

[0024] However, if the rotation mechanism 3 is rotated by a motor (not shown) to rotate the support part 4 without fixing the position of the pallet P placed on the upper surface of the support part 4, the pallet P will move in a direction away from the rotation direction, that is, it will jump out of the support part 4. Therefore, in this embodiment, the following measures are taken to prevent this from happening, as will be explained in detail below.

[0025] As shown in Fig. 2, a first trapezoidal screw 7A is disposed on the upper surface 41a of the first support frame 41 at a position along the central axis O1. As shown in Fig. 2, this first trapezoidal screw 7A is rotatably attached between rectangular first mounting bases 8A spaced a certain distance apart in the vertical direction. Also, as shown in Fig. 2, a first stopper portion 9A is provided on the first trapezoidal screw 7A so as to be movable between the pair of first mounting bases 8A. The first mounting bases 8A are attached and fixed to the first support frame 41.

[0026] On the other hand, as shown in FIG. 2, a second trapezoidal screw 7B is arranged on the right side surface 43d of the second support frame 43 at a position along the central axis O2. As shown in FIG. 2, this second trapezoidal screw 7B is rotatably attached between rectangular second mounting bases 8B spaced a certain distance apart in the left-right direction. Also, as shown in FIG. 2, a second stopper portion 9B is provided on the second trapezoidal screw 7B so as to be movable between the pair of second mounting bases 8B. The second mounting bases 8B are attached and fixed to the second support frame 43.

[0027] On the other hand, as shown in Fig. 2, a third trapezoidal screw 7C is arranged on the underside 41c of the first support frame 41 at a position along the central axis O1. As shown in Fig. 2, this third trapezoidal screw 7C is rotatably attached between rectangular third mounting bases 8C spaced a certain distance apart in the vertical direction. Also, as shown in Fig. 2, a third stopper portion 9C is provided on the third trapezoidal screw 7C so as to be movable between the pair of third mounting bases 8C. The third mounting bases 8C are attached and fixed to the first support frame 41.

[0028] On the other hand, as shown in Fig. 2, a fourth trapezoidal screw 7D is arranged on the left side surface 43a of the second support frame 43 at a position along the central axis O2. As shown in Fig. 2, this fourth trapezoidal screw 7D is rotatably attached between rectangular fourth mounting bases 8D spaced a certain distance apart in the left-right direction. As shown in Fig. 2, a fourth stopper portion 9D is provided on the fourth trapezoidal screw 7D so as to be movable between the pair of fourth mounting bases 8D. The fourth mounting bases 8D are attached and fixed to the second support frame 43.

[0029] The first trapezoidal screw 7A to the fourth trapezoidal screw 7D configured as described above have the same configuration, and the first mounting base 8A to the fourth mounting base 8D also have the same configuration, and the first stopper portion 9A to the fourth stopper portion 9D also have the same configuration. Therefore, in the following, we will explain the second trapezoidal screw 7B, the second mounting base 8B, and the second stopper portion 9B as representatives, and will not explain the other configurations as they are all the same.

[0030] As shown in FIG. 3(a), the second mounting bases 8B are attached to the second support frame 43 at a fixed interval. Specifically, they are attached and fixed so as to connect the upper surface 43b and the lower surface 43c of the second support frame 43. As shown in FIG. 3(a), a second trapezoidal screw 7B is rotatably attached between the pair of second mounting bases 8B at a position along the central axis O2. In addition, to protect the second trapezoidal screw 7B, a bellows 7Ba is provided over the entire second trapezoidal screw 7B, as shown in FIG. 3(a). Furthermore, as shown in FIG. 3, one end 7Bb (the right end in the figure) of the second trapezoidal screw 7B is formed in a bullet shape.

[0031] On the other hand, as shown in FIG. 3(a), the second stopper portion 9B is provided with a movable base 90B that is rectangular in plan view. As shown in FIG. 3(b), this movable base 90B is movably attached to the second trapezoidal screw 7B. That is, by rotation of the second trapezoidal screw 7B, the movable base 90B can move in the left-right direction shown in FIG. 3. As shown in FIG. 3(b), a spring member 7Bc is provided between the movable base 90B and the second trapezoidal screw 7B. This spring member 7Bc is wound around the second trapezoidal screw 7B and constantly applies tension to the second stopper portion 9B. As a result, the biasing force of the spring member 7Bc prevents the second stopper portion 9B from moving due to influences such as vibration. is doing.

[0032] On the other hand, as shown in FIG. 3(a), a pair of clamp mechanisms 91B are provided on the movable stage 90B. As shown in FIG. 1, the clamp mechanism 91B includes a clamp mechanism main body 91Ba that is L-shaped in a front view. As shown in FIG. 1, a biasing member (not shown) is provided at the base end 91Bb of the clamp mechanism main body 91Ba. The biasing member (not shown) biases the base end 91Bb upward, thereby biasing the tip end 91Bc of the clamp mechanism main body 91Ba to the right in the figure. Thus, when a pallet P is placed on the upper surface of the support 4 in this state, the underside of the pallet P comes into contact with the base end 91Bb. This contact causes the base end 91Bb to move downward, and the tip end 91Bc of the clamp mechanism main body 91Ba to move leftward in the figure. As a result, the clamp mechanism main body 91Ba comes into contact with the side surface Pa of the pallet P to clamp it, as shown in FIG. 1. Therefore, in this manner, the clamp mechanism 91B is automatically attached to the pallet P, and the pallet P is clamped by the clamp mechanism 91B.

[0033] Thus, the first trapezoidal screw 7A, the third trapezoidal screw 7C, and the fourth trapezoidal screw 7D also have the configuration as described above, and further, the first mounting base 8A, the third mounting base, and the fourth mounting base 8D also have the configuration as described above, and further, the first stopper portion 9A, the third stopper portion 9C, and the fourth stopper portion 9D also have the configuration as described above.

[0034] By using the first stopper portion 9A to the fourth stopper portion 9D to clamp the side surface Pa of the pallet P as described above, the position of the pallet P placed on the upper surface of the support portion 4 can be fixed, as shown in Figure 1.

[0035] However, if the clamp position is fixed, it is not possible to accommodate a wide variety of pallets P having different width and length sizes.

[0036] Therefore, in this embodiment, the first stopper portion 9A to the fourth stopper portion 9D are made movable. The movement method will be explained below using the second stopper portion 9B as an example.

[0037] To move the second stopper portion 9B, i.e., to move the movable table 90B shown in Fig. 3(a), it is necessary to rotate the second trapezoidal screw 7B. To rotate the second trapezoidal screw 7B, first, a coupling 10, which is a connector having a horizontally elongated rectangular shape in plan view shown in Figs. 2 and 3(a), is connected to one end 7Bb (see Fig. 3(a)) of the second trapezoidal screw 7B.

[0038] As shown in FIG. 2, the coupling 10 is connected to the rotation shaft M1a of the trapezoidal screw rotation motor M1, and the coupling 10 is movable in the direction of arrow Y1 shown in FIG. 2 (left and right in the figure). That is, as shown in FIG. 2, the trapezoidal screw rotation motor M1 is attached and fixed to a movable base 11 that is rectangular in a plan view. The movable base 11 is movable left and right in the figure by a cylinder 12 shown in FIG. 2. That is, when the movable base 11 is moved leftward in FIG. 2 by the cylinder 12, the coupling 10 connected to the rotation shaft M1a of the trapezoidal screw rotation motor M1 also moves leftward in FIG. 2. Therefore, the coupling 10 can be connected to one end 7Bb of the second trapezoidal screw 7B (see FIG. 3(a)).

[0039] Thus, as shown in FIGS. 2 and 3(a), when the coupling 10 is connected to one end 7Bb (see FIG. 3(a)) of the second trapezoidal screw 7B, the trapezoidal screw rotating motor M1 is driven. This causes the rotation shaft M1a shown in FIG. 2 to rotate, which in turn causes the second trapezoidal screw 7B to rotate via the coupling 10. Therefore, the rotation of the second trapezoidal screw 7B can move the movable table 90B shown in FIG. 3(a), and therefore the second stopper portion 9B can be moved to a desired position.

[0040] Thus, when the second stopper portion 9B is moved to the desired position, the drive of the trapezoidal screw rotating motor M1 is stopped. This stops the rotation of the rotation shaft M1a, and therefore the rotation of the second trapezoidal screw 7B. Thereafter, when the movable base 11 is moved rightward in FIG. 2 by the cylinder 12 shown in FIG. 2, the coupling 10 connected to the rotation shaft M1a of the trapezoidal screw rotating motor M1 also moves rightward in FIG. 2. Therefore, the coupling 10 disconnects from one end 7Bb of the second trapezoidal screw 7B (see FIG. 3(a)) and moves in a direction away from one end 7Bb of the second trapezoidal screw 7B (see FIG. 3(a)). As shown in FIG. 2, the movable base 11 is provided with, in addition to the trapezoidal screw rotating motor M1, a pulley 13 attached to the rotation shaft M1a, a timing belt 14 wound around the pulley 13, and an encoder 15 wound around the timing belt 14 to monitor the rotation speed of the trapezoidal screw rotating motor M1.

[0041] Therefore, in this way, the second trapezoidal screw 7B can be rotated.

[0042] Incidentally, when it is desired to rotate the first trapezoidal screw 7A, the rotation mechanism 3 shown in Fig. 1 is rotated by a motor (not shown) to rotate the support part 4 clockwise by 90° from the position shown in Fig. 2. In this way, the position of one end 7Ab of the first trapezoidal screw 7A shown in Fig. 2 coincides with the position of one end 7Bb of the second trapezoidal screw 7B shown in Fig. 2, making it possible to connect to the coupling 10 shown in Fig. 2, thereby enabling the operation described above.

[0043] Furthermore, when it is desired to rotate the third trapezoidal screw 7C, the rotation mechanism 3 shown in Fig. 1 is rotated by a motor (not shown), and the support part 4 is rotated 90° counterclockwise to the right from the position shown in Fig. 2. In this way, the position of one end 7Cb of the third trapezoidal screw 7C shown in Fig. 2 coincides with the position of one end 7Bb of the second trapezoidal screw 7B shown in Fig. 2, making it possible to connect to the coupling 10 shown in Fig. 2, thereby enabling the operation described above.

[0044] Furthermore, when it is desired to rotate the fourth trapezoidal screw 7D, the rotation mechanism 3 shown in Fig. 1 is rotated by a motor (not shown) to rotate the support part 4 180° clockwise or counterclockwise from the position shown in Fig. 2. In this way, the position of one end 7Db of the fourth trapezoidal screw 7D shown in Fig. 2 coincides with the position of one end 7Bb of the second trapezoidal screw 7B shown in Fig. 2, making it possible to connect to the coupling 10 shown in Fig. 2, thereby enabling the operation described above.

[0045] Thus, by doing this, it is not necessary to provide a motor for each of the first trapezoidal screw 7A to the fourth trapezoidal screw 7D, and it is sufficient to provide one trapezoidal screw rotation motor M1. On the other hand, although a motor may be provided for each of the first trapezoidal screw 7A to the fourth trapezoidal screw 7D, it is preferable not to provide one for the following reasons.

[0046] That is, if a motor were provided for each of the first trapezoidal screw 7A to the fourth trapezoidal screw 7D and fixed in place, the weight of the motor would slow down the rotation of the support part 4, which could prevent the moisture adhering to the pallet P from being removed by centrifugal dehydration. However, in this embodiment, one trapezoidal screw rotation motor M1 is provided, and as explained above, this trapezoidal screw rotation motor M1 can be retracted after rotating the first trapezoidal screw 7A to the fourth trapezoidal screw 7D, so it does not affect the rotation of the support part 4. This prevents the weight of the motor from slowing down the rotation of the support part 4, which could prevent the moisture adhering to the pallet P from being removed by centrifugal dehydration.

[0047] Therefore, as described above, by rotating the first trapezoidal screw 7A to the fourth trapezoidal screw 7D, the first stopper portion 9A to the fourth stopper portion 9D can be moved. For example, as shown in FIG. 4, the distance L3 between the second stopper portion 9B and the fourth stopper portion 9D can be made shorter than the distance L1 between the second stopper portion 9B and the fourth stopper portion 9D shown in FIG. 2. Furthermore, as shown in FIG. 4, the distance L4 between the first stopper portion 9A and the third stopper portion 9C can be made shorter than the distance L2 between the first stopper portion 9A and the third stopper portion 9C shown in FIG. 2. Therefore, even if the pallet P is smaller in width and length than the pallet P shown in FIG. 1, the side surface Pa can be clamped by the first stopper portion 9A to the fourth stopper portion 9D.

[0048] Thus, as described above, the positions of the first stopper portion 9A to the fourth stopper portion 9D can be freely moved by rotating the first trapezoidal screw 7A to the fourth trapezoidal screw 7D, and therefore the position at which the side surface Pa of the pallet P is clamped by the first stopper portion 9A to the fourth stopper portion 9D can be freely changed.

[0049] Therefore, according to the present embodiment described above, it is possible to accommodate many types of pallets.

[0050] The pallet dewatering device 1 described above clamps the side surface Pa of the pallet P with the first stopper portion 9A to the fourth stopper portion 9D, and then rotates the support portion 4 to remove moisture adhering to the pallet P through centrifugal dewatering.

[0051] At this time, because the side surface Pa of the pallet P is clamped by the first stopper portion 9A to the fourth stopper portion 9D, the pallet P is unlikely to deviate from the direction of rotation, i.e., to fly out of the support portion 4. However, if any malfunction occurs in the first stopper portion 9A to the fourth stopper portion 9D, the possibility of the pallet P deviating from the direction of rotation cannot be denied.

[0052] Therefore, in this embodiment, in preparation for an emergency, the pallet dewatering device 1 further includes a holding portion 16 that is substantially rectangular in front view, as shown in FIG. 1. As shown in FIG. 1, a lifting cylinder 17 is provided above the holding portion 16, and the upper surface of the holding portion 16 is attached and fixed to the tip of a piston rod 17a of the lifting cylinder 17. As a result, when the piston rod 17a of the lifting cylinder 17 is raised and lowered in the vertical direction shown in FIG. 1, the holding portion 16 rises and falls in the vertical direction (direction of arrow Y5) shown in FIG. 1. Therefore, when the holding portion 16 descends downward as shown in FIG. 1, the holding portion 16 comes into contact with the upper surface of the pallet P as shown in FIG. 1, and the upper surface of the pallet P can be held down by the holding portion 16. This prevents the pallet P from flying out of the support portion 4, that is, from departing from the rotational direction.

[0053] <Description of Modifications> It should be noted that the contents exemplified in this embodiment are merely examples, and various modifications and changes are possible within the scope of the gist of the present invention as set forth in the claims. For example, the clamp mechanism 91B exemplified in this embodiment is merely an example, and is not limited to this, and any configuration that can clamp the side surface Pa of the pallet P is acceptable.

[0054] Furthermore, in this embodiment, the first trapezoidal screw 7A to the fourth trapezoidal screw 7D are exemplified, but the present invention is not limited to these and may be applied to ball screws or any other screw mechanism as long as it is capable of operating as described above. [Explanation of symbols]

[0055] 1 Pallet dewatering device 4 Support part 7A No. 1 trapezoidal screw (screw mechanism) 7B Second trapezoidal screw (screw mechanism) 7C 3rd trapezoidal screw (screw mechanism) 7D No. 4 trapezoidal screw (screw mechanism) 9A First stopper part (stopper part) 9B Second stopper part (stopper part) 9C Third stopper part (stopper part) 9D Fourth stopper part (stopper part) 10 Coupling (connection part) 11 Movable platform (movement means) 12 Cylinder (Means of Transportation) 16 Retaining part M1 Trapezoidal screw rotation motor (first driving means) P Palette Pa side

Claims

1. a support portion that supports the pallet; a screw mechanism provided to pass through a central axis of the support portion; a stopper portion movably provided on the screw mechanism; a first driving means for rotationally driving the screw mechanism; a second driving means for rotationally driving the support portion, When the screw mechanism is driven to rotate by the first driving means, the stopper portion moves in a predetermined direction accordingly, thereby causing the stopper portion to clamp the side of the pallet, and when the support portion is driven to rotate by the second driving means in this state, the stopper portion can restrict the pallet from moving in a direction away from the rotational direction of the pallet.

2. a connection portion that can connect the screw mechanism and the first driving means; and a moving means for moving the connection portion, the moving means moves the connection portion, and the screw mechanism and the first driving means are connected at the connection portion; A pallet dewatering device as described in claim 1, wherein when the rotational drive of the screw mechanism by the first drive means is completed, the connection part is moved by the moving means to disconnect the screw mechanism from the first drive means.

3. 3. A pallet dewatering device according to claim 1 or 2, further comprising a holding portion for holding down an upper surface of the pallet.

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