JP2011234973A - Operation mechanism of caster with lock mechanism in raising/lowering type moving table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the operation mechanism of casters, the mechanism in which an operation part for making casters in a locked state is installed on a table top board so as to make the operation easier, in which all casters can be operated all together, and in which operation force can be reduced, in a raising/lowering type moving table.SOLUTION: The raising/lowering type table has leg parts 4 equipped with casters 5 with a lock mechanism, props 3 that are erected from the leg parts and extendable/contractible, and a slender table top board 2 supported on the props. The table is configured to have an operation part 7 with an operating lever 6 installed that is turnable in a horizontal or nearly horizontal plane in the lower part of the table top board, and in the leg parts, there is installed an operation lever for operating the lock mechanism of the casters. Thus, the operation mechanism is provided in which an operation wire consisting of an inner wire and an outer wire is connected between the working point side of the operation part and the power point side of the operation lever.

Description

  The present invention relates to an operation mechanism for setting a caster for moving in a lifted or unlocked state in a liftable moving table such as a bedside table or an overbed table.

  When using a bedside table that moves in the width direction of the bed and brings it to a predetermined position and an overbed table that moves in the longitudinal direction of the bed and brings it to a predetermined position, the caster is used when used. An operation mechanism is provided for preventing the operation of the camera.

  For example, in Patent Document 1, in a bedside table, a grounding member that can move up and down on a leg provided with casters, an operating means that moves the grounding member up and down, and an operation that pushes down the grounding member toward the floor by the operating means A lock mechanism provided with holding means for holding the caster in a state of floating from the floor surface is described.

  In such an operation mechanism, since the operation part is located on the leg side, it is difficult to operate, and in order to operate on all casters of the leg, for example, two operations are required for each side. It becomes.

  On the other hand, although it is not an elevating type moving table, Patent Document 2 discloses that four casters arranged on the floor surface are used as operation wires composed of an inner wire and an outer wire. An operation mechanism is described in which the operation lever is configured to be collectively operated and the operation lever is disposed at the upper end portion of the side plate of the floor head.

  In such an operation mechanism, the operation lever is provided on the top of the floor head, so that it is easy to operate, and all casters can be locked at the same time with one operation. Therefore, it is difficult to increase the lever ratio and reduce the operating force.

Japanese Patent No. 3463805 JP 2010-88490 A

  The present invention was devised in view of the above-described conventional technology, and in an elevating type moving table, an operation portion for making the caster locked is provided on the table plate to facilitate the operation, and all casters are provided. It is an object of the present invention to provide a caster operating mechanism that can be operated in a lump and that can reduce the operating force. Furthermore, it is an object of the present invention to provide a caster operating mechanism with improved safety so that the locked state of the caster can be reliably maintained.

  In the present invention, in order to solve the above-described problems, the elevator includes a leg portion provided with a caster with a lock mechanism, a column portion that can be extended and contracted from the leg portion, and an elongated table plate supported by the column portion. In the type table, an operation portion provided with an operation lever that can be rotated in a horizontal or substantially horizontal plane is provided at a lower portion of the table plate, and an operation lever that operates a lock mechanism of a caster is provided on the leg portion. And a position B on the operating lever disposed on the opposite side of the operating pin with respect to the fulcrum O of the operating lever, and a position B on the operating lever that is disposed on both sides of the inner wire, An elevating movable table having an outer wire fixed at a position C that does not operate depending on the operation lever and the operation lever. It has proposed a caster of the operation mechanism with a lock mechanism in.

  According to the present invention, in the above configuration, the operation portion is fixed to the support frame so as to be rotatable, and the operation lever provided with the link connecting portion on the side of the rotation shaft and the outer wire fixing portion are advanced and retracted. An inner wire fixing member supported movably on a support frame so as to be possible, and a link having a U-shaped recess connected between the link connecting portion and the inner wire fixing member, and a pivot shaft of the operation lever However, an operation mechanism for a caster with a lock mechanism in a lifting / lowering moving table designed to be positioned in the U-shaped recess inside a straight line connecting the connecting portions of the link is proposed.

  Further, in the present invention, in the above configuration, the leg portion is provided with the inner wire connecting side at an intermediate position between the pair of casters separated in the direction perpendicular to the longitudinal direction of the table plate, and each of the pair of casters is arranged. An operation mechanism for a caster with a lock mechanism in a liftable moving table configured such that the operation lever position B is located on the connection side of the operation wire and can be operated in conjunction with a common inner wire is proposed.

  In the operation mechanism of the present invention, the operation lever is provided at the lower part of the table plate and can be rotated easily in a horizontal or substantially horizontal plane. In addition, since the operating stroke of the operating lever can be increased and the lock mechanism of the caster is operated by the operating lever, the lever ratio can be increased and the operating force can be reduced. Can be operated in a batch. And in the operation mechanism of the present invention, a large lever ratio by a mechanism using a lever is used, but the table plate side and the leg part side are connected with an operation wire composed of an inner wire and an outer wire. , There is no interference with the expansion and contraction of the support. The operation unit has a configuration in which the state holding corresponding to the locked state of the caster is performed by a toggle action, thereby improving safety.

FIG. 1 is a perspective view of an example of an elevating type moving table according to the present invention as viewed obliquely from above. FIG. 2 is a perspective view of an example of the elevating type moving table according to the present invention viewed obliquely from below. FIG. 3 is a side view conceptually showing the structure on the leg side of an example of the elevating type moving table according to the present invention. FIG. 4 is a side view conceptually showing, in another aspect, the structure of the leg portion side of an example of the liftable moving table according to the present invention. FIG. 5 is a plan view showing a configuration of an operation unit as an example of the lifting type moving table according to the present invention. FIG. 6 is a plan view showing the configuration of the operation unit as an example of the lifting type moving table according to the present invention, excluding some members. FIG. 7 is a plan view showing the configuration of the operation unit as an example of the liftable moving table according to the present invention in another aspect except for some members. FIG. 8 is a plan view showing the configuration of the operation unit as an example of the liftable moving table according to the present invention in still another aspect except for some members.

Next, an example of an overbed table will be described with reference to FIGS. 1 to 8 as an example of a liftable moving table to which the present invention is applied.
First, in the figure, reference numeral 1 denotes an elevating movable table, in this case, an overbed table. This overbed table 1 has a pair of extendable struts at both longitudinal ends of an elongated table plate 2. Are provided at the bottom of each support column 3 and are provided with a pair of locking mechanisms at both ends of each leg 4. A caster 5 is provided.

  An operating portion 7 is provided at the lower portion of the table plate 2 and provided with an operating lever 6 that can be rotated in a horizontal or substantially horizontal plane. An operating lever 8 that operates a lock mechanism of the caster 5 is provided on the leg portion 4. Provided. In the locking mechanism, an operating pin 9 is projected in the same direction as the mounting shaft of the caster 5, and the caster 5 is locked when the operating pin 9 is pushed from above by the operating portion 10 at the end of the operating lever 8. Mechanism. In addition, although the operation pin 9 is a structure maintained with a spring etc. so that the caster 5 may not be locked when not pushed from upper direction, they are abbreviate | omitting illustration.

  In this embodiment, an intermediate position between the pair of casters 5 provided on the leg portion 4 is configured as the power point side of the operating lever 8, and the force point side of the operating portion 7 and the power point side of the operating lever 8 are arranged. Further, an operation wire 13 composed of an inner wire 11 and an outer wire 12 is connected. That is, in this embodiment, the position A that is operated by operating the operating lever 6 and the operating lever 8 that is disposed on the opposite side of the operating pin 9 with respect to the fulcrum O of the operating lever 8. Is connected to both ends of the inner wire 11 and the outer wire 12 is fixed to a position C that does not operate depending on the operation of the operation lever 6 and the operation lever 8. As described above, the leg 4 is provided with a connecting side of the inner wire 11 at an intermediate position between the pair of casters 5 separated in the direction orthogonal to the longitudinal direction of the table plate 2, and the respective operation levers 8 of the pair of casters 5. The position B is positioned on the connecting side of the inner wire 11 so that the common inner wire 11 can be operated in conjunction.

  Next, the illustrated example of the operation unit 7 will be described. The operation unit 7 is fixed to the support frame 14 so as to be rotatable, and the operation lever 6 provided with the link connecting unit 16 on the lateral side of the rotation shaft 15. The inner wire fixing member 18 movably supported by the support frame 14 so as to be movable back and forth with respect to the outer wire fixing portion 17 with respect to the support frame 14, and between the link connecting portion 16 and the inner wire fixing member 18. A link 20 having a U-shaped recess 19 connected to the element is used as an element, and the rotation shaft 15 of the operation lever 6 is positioned inside the U-shaped recess 19 on the inner side of a straight line 24 connecting the connecting portions of the link 20. Designed and configured as such. In the operation unit 7, the inner wire fixing member 18 is configured to be movable along a long hole 21 provided in the support frame 14. Reference numerals 22 and 23 are stoppers for determining the rotation range of the operation lever 6, respectively.

  The operation of the above configuration will be described. First, as shown in FIGS. 5 and 6, when the operation lever 6 is rotated counterclockwise in the drawing and is in contact with the right stopper 23, the inner wire is fixed. Since the member 18 has moved to the right end side of the long hole 21 and is short with the outer wire fixing portion 17, the other end side of the inner wire 11 is not pulled.

  Therefore, as shown in FIG. 3, since the power point side of the operating lever 8 is not lifted by the other end side of the inner wire 11, the operating part 10 does not push the operating pin 9, and therefore any casters 5 on the left and right sides are The locked state is maintained.

  Next, when the operation lever 6 is rotated clockwise from the state shown in FIGS. 5 and 6, the link 20 is moved in the left direction in the figure along the circular locus by the link connecting portion 16 of the operation lever 6. Thus, the inner wire fixing member 18 is moved in the left direction in the figure along the long hole 21.

  Since the inner wire fixing member 18 gradually moves away from the outer wire fixing portion 17 in this way, the power point side of the operating lever 8 is lifted by the other end side of the inner wire 11, as shown in FIG. Since the actuating part 10 pushes the actuating pin 9, both the left and right casters 5 are locked.

  In the clockwise rotation in the figure, the operation lever 6 is brought into a stopped state by contacting the stopper 22 as shown in FIG. 8 from the state of FIG. 6 through the state of FIG. Since the U-shaped recess 19 has a U-shaped recess 19, the link connecting portion 16 is connected to a connecting portion 25 between the link 20 and the inner wire fixing member 18 and a position below a straight line 24 passing through the rotary shaft 15 as shown in FIG. As shown in FIG. 7, it passes through a position coinciding with the straight line 24 and reaches a position above the straight line 24 as shown in FIG.

  For this reason, the operating lever 6 is reliably held at the stop position shown in FIG. 8 by a so-called toggle action against the tensile force from the inner wire 11, and therefore the caster 5 is securely held in the locked state by the lock mechanism. be able to.

  Then, in contrast to the above, the operation lever 6 is rotated counterclockwise from the state of FIG. 8 to shift to the state of FIG. 6 through the state of FIG. 7, and thus the caster 5 is in the locked state. Release can be made.

From the above, the present invention has the following great advantages as described above.
1. Since the operation lever 6 is provided in the lower part of the table board 2 and can be rotated in a horizontal or substantially horizontal plane, it is easy to operate.
2. Further, since the operation stroke of the operation lever 6 can be increased and the lock mechanism of the caster 5 is operated by the operation lever 8, the lever ratio can be increased and the operation force can be reduced. The lock mechanism can be operated in a lump. In the operation mechanism of the present invention, a large lever ratio by a mechanism using a lever is used, but the operation wire 13 including the inner wire 11 and the outer wire 12 is provided on the table plate 2 side and the leg 4 side. Since they are connected, they do not interfere with the expansion / contraction operation of the column 3 at all.
3. Since the operation part 7 is a structure which performs the state holding | maintenance corresponding to the locked state of the caster 5 by a toggle effect | action, safety | security is higher.

  In the above, the embodiment in which the operation mechanism of the present invention is applied to an overbed table has been described, but it is needless to say that the operation mechanism can be applied to a bedside table.

1 Overbed table (lifting and moving table)
2 Table plate 3 Column 4 Leg 5 Caster 6 Operation lever 7 Operation unit 8 Operation lever 9 Operation pin 10 Operation unit 11 Inner wire 12 Outer wire 13 Operation wire 14 Support frame 15 Rotating shaft 16 Link connection unit 17 Outer wire fixing Part 18 Inner wire fixing member 19 U-shaped recess 20 Link 21 Long hole 22, 23 Stopper 24 Straight line 25 Connection part

Claims (3)

In an elevating table having a leg portion provided with a caster with a lock mechanism, a supportable column portion standing upright from the leg portion, and an elongated table plate supported by the column portion, a horizontal or substantially horizontal surface below the table plate An operating portion provided with an operating lever that can be rotated inside, and an operating lever that operates an operating pin of a locking mechanism of a caster is provided on the leg portion, and a position A that operates by operating the operating lever; In addition, the position B on the operating lever arranged on the opposite side of the operating pin with respect to the fulcrum O of the operating lever is connected by both ends of the inner wire, and depends on the operation of the operating lever and the operating lever. With a lock mechanism in a liftable moving table, characterized in that the outer wire is fixed at a position C where it does not move Caster of the operation mechanism. The operation part is fixed to the support frame so that it can rotate, and the operation lever that has a link connection part on the side of the rotation axis and the support frame can be moved so that it can move forward and backward. And a link having a U-shaped recess connected between the link connecting portion and the inner wire fixing member, and the rotation shaft of the operating lever is a straight line connecting the connecting portions of the links. 2. The operating mechanism of the caster with a lock mechanism in the lifting type moving table according to claim 1, wherein the operating mechanism is designed to be positioned inside the U-shaped recess on the inner side. The leg is provided with a connecting side of the inner wire at an intermediate position between the pair of casters separated in a direction perpendicular to the longitudinal direction of the table plate, and the position B of each operating lever of the pair of casters is connected to the inner wire. The operation mechanism of the caster with a lock mechanism in the elevating type movable table according to claim 1 or 2, wherein the operation mechanism is configured to be interlocked with a common inner wire.

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