JP3363845B2 - Turntable - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turntable mainly used for cargo handling in which an upper plate is rotatably supported on a lower plate. 2. Description of the Related Art Conventionally, this kind of turntable has been widely used for cargo handling and the like. In this type of turntable, the upper plate is rotatably supported on the upper portion of the lower plate, and various types of support of the upper plate by the lower plate have been proposed. The plate is usually disc-shaped, and its upper surface is usually flat. [0003] However, in this type of turntable, a hand pallet truck or the like is used when placing an article on an upper plate or carrying out an article from the upper plate in use. In many cases, the hand pallet truck is mounted on the turntable or pulled out with the article mounted thereon. At this time, since the conventional turntable has a step corresponding to the thickness of the turntable at its outer periphery, the turntable can be climbed over or pulled out over the step, making the operation difficult. [0005] When a hand pallet truck gains momentum and tries to get on a turntable, it often happens that the cargo collapses. In addition, the turntable also tends to be distorted because a large force is applied locally to the outer peripheral edge thereof. [0006] A slope member for the hand pallet truck to ride on is also installed near the turntable. However, when the hand pallet truck climbs or pulls out, the slope member moves to move the hand pallet truck. It is difficult to smoothly take in and out, and the slope member often hinders rotation of the turntable and cargo handling work. The present invention has been made in view of the above circumstances, and has as its object to form a slope on a turntable so that a hand pallet truck can be smoothly moved in and out of the turntable. It is. [0008] According to the present invention, in a turntable in which an upper plate is rotatably supported on an upper portion of a lower plate, a peripheral edge of at least a part of an outer periphery of the upper plate is reduced. A stopper formed of a rocking piece that swings like a seesaw, the tip of which can be locked and released from a locking portion formed on the lower plate, is provided on the sloped edge. A rear end portion of the swinging piece projects upward from an upper surface of the upper plate when the moving piece is locked to the locking portion. Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an embodiment of a turntable 1 according to the present invention, in which an upper plate 3 is provided on an upper portion of a lower plate 2, and the upper plate 3 is provided around a rotation shaft 4. 2 can be rotated. On the lower surface of the upper plate 3, a double annular rib 5 is provided so as to project concentrically around the rotation shaft 4, and a number of steel balls 6 are fitted between the annular ribs 5. The steel balls 6 roll on the lower plate 2 while supporting the load applied to the upper plate 3 to allow the upper plate 3 to rotate. The upper plate 3 is disk-shaped and has a flat upper surface, and has inclined edges 7 formed at two opposing outer peripheral portions so that the peripheral edges become lower. Although the inclined edge 7 is formed in two places in the example of the drawing, it may be formed in one place, or may be formed in three or more places. Further, it is also possible to form the inclined edge 7 on the entire periphery of the upper plate 3. In this embodiment, a stopper 8 is provided at the center of one inclined edge 7. As shown in FIGS. 3 to 5, the stopper 8 has a rocking piece 10 fitted in a notch 9 formed in the inclined edge 7 of the upper plate 3.
The rocking piece 10 is pivotally supported by a support shaft 11 penetrating a central portion thereof, and can rock like a seesaw. Then, as shown in FIG. 5, the swinging piece 10 swings so that the tip moves down, and the locking piece 12 formed at the tip thereof has a locking hole 13 formed in the lower plate 2. , The rotation of the upper plate 3 with respect to the lower plate 2 is prevented, and the rear end of the swinging piece 10 projects upward from the upper surface of the upper plate 3. Further, as shown in FIG. 4, the locking piece 12 is disengaged from the locking hole 13 by swinging so that the rear end moves downward.
The rotation of the upper plate 3 is made possible. In this example, the locking holes 13 are formed at a plurality of positions over the entire circumference of the turntable 1 as shown in FIG. 1, and the locking pieces 12 are engaged with one of the locking holes 13. By stopping, it stops at that position. The number of the locking holes 13 is not limited, and it is sufficient that at least one locking hole is provided. The locking piece 12 and the locking hole 13 only need to have a structure that can lock each other to prevent rotation of the upper plate 3 with respect to the lower plate 2. There need not be a relationship between the piece and the hole. The swinging piece 10 is provided with click balls 14 which can be protruded and retracted on both side surfaces thereof. The click balls 14 are urged by a spring 15 in a direction protruding from the side faces of the rocking piece 10 to be cut. By fitting into a click hole 16 formed in the side surface of the notch 9, the swinging piece 10 is
It is held at the position where it is locked and the position where it is released. In this case, when the swing range of the swinging piece 10 is small and the click holes 16 corresponding to the locking position and the release position approach, as shown in FIG. A click hole 16a corresponding to the engagement state of the rocking piece 10 is formed on the side surface of the rocking piece 10, and a click hole 16b corresponding to the disengagement state is formed on the other side face, thereby securely holding the rocking piece 10 in both states. Can be. Although the stopper 8 is used for only one of the two inclined edges 7 in the drawing, when a plurality of inclined edges 7 are provided, the stopper 8 is formed on a plurality of the inclined edges 7. Is also good. Also, even when the inclined edge 7 is formed on the entire periphery of the upper plate 3, it can be provided at a plurality of locations. In FIG. 1, reference numeral 17 denotes a fixing hole, in which a through hole is formed in the upper plate 3 and a screw hole is formed in the lower plate 2. The upper plate 3
The lower plate 2 and the upper plate 3 can be fixed by being screwed into the screw holes of the lower plate 2 through the through holes. In this way, when the turntable 1 is transported or moved, the rotating shaft 4
, Or the lower plate 2 or the upper plate 3 is distorted and the steel ball 6 falls off. FIG. 7 shows another embodiment of the present invention. In FIG. 1, the inclined edge 7 is formed in an arc shape, but in FIG. 7, the inclined edge 7 is formed in a linear shape. Is formed. In this case, as shown in FIG. 7, the annular rib 5 is formed in a drum shape, and the steel ball 6 rolls therebetween. By making the annular rib 5 smaller in diameter, it can be formed into a small diameter circle near the center of the upper plate 3, but the steel ball 6 is placed closer to the outer periphery of the upper plate 3. Since rolling along the upper plate 3 stabilizes the rotation, it is preferable to form a deformed rolling path as shown in FIG. In the present invention, the upper plate 3 is connected to the rotating shaft 4
Can be rotated with respect to the lower plate 2 around the center, and the articles are placed on the upper plate 3 and the upper plate 3 is rotated. And the packaging operation is easy. Further, as shown in the drawing, a position near the outer periphery between the upper plate 3 and the lower plate 2 is supported by the steel balls 6, so that even if a heavy object is placed on the upper By upper plate 3
It rotates smoothly without distortion. When an article is put on or lowered from the turntable 1 using the hand pallet truck, the hand pallet truck is moved through the inclined edge 7 to the upper plate 3.
You can get on and pull it out,
It can be put in and out smoothly and there is no collapse of cargo. Further, a stopper 8 is provided at the center of the inclined edge 7, and the rotation of the upper plate 3 is stopped by the stopper 8 when the hand pallet truck is taken in and out.
The hand pallet truck can be taken in and out more stably. Since the stopper 8 is composed of a rocking piece 10 that rocks in a seesaw shape, the locking piece 12 is locked in the locking hole 13 by stepping on the tip of the rocking piece 10 with a foot. Then, the rotation of the upper plate 3 is stopped, and the locking piece 12 is detached from the locking hole 13 by stepping on the rear end portion, thereby enabling the rotation of the upper plate 3. In the present invention, when the swinging piece 10 is locked, the rear end of the swinging piece 10 projects upward from the upper surface of the upper plate 3 as shown in FIG. When a large article is mounted thereon, the swinging piece 10 is pushed down at its rear end due to the weight of the article, and is brought into a detached state. Therefore, it is possible to prevent a situation in which the rocking piece 10 in the locked state is hidden under the article and cannot be returned to the detached state, and the upper plate 3 cannot rotate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a turntable according to an embodiment of the present invention. FIG. 2 is a front view of the turntable. FIG. 3 is an enlarged plan view of a stopper in the turntable. FIG. 5 is a cross-sectional view of the rocking piece taken along line aa in FIG. 3; FIG. 5 is a cross-sectional view of the rocking piece taken along line aa in FIG. 3; FIG. 7 A plan view of a turntable according to another embodiment of the present invention [Description of symbols] 1 Turntable 2 Lower plate 3 Upper plate 7 Inclined edge 8 Stopper 13 Locking portion (locking hole)

Claims (1)

(57) Claims 1. In a turntable (1) in which an upper plate (3) is rotatably supported above a lower plate (2), at least the outer periphery of the upper plate (3) is provided. An inclined edge (7) having a lower peripheral edge is formed in a part thereof, and the tip of the inclined edge (7) is detachable from an engaging portion (13) formed on the lower plate (2). A stopper (8) formed of a rocking piece (10) that rocks in a seesaw shape, and the rocking piece (1) is locked in a state where the rocking piece (10) is locked to the locking portion (13).
0) A turntable characterized in that a rear end portion protrudes upward from an upper surface of the upper plate (3).