JP5327888B2 - Safety mechanism for overbed table - Google Patents

Description

  The present invention relates to an overbed table, and more particularly to prevent breakage when an external force is applied below the table plate of the overbed table, such as when the bed floor is raised during use. It relates to the safety mechanism.

  For example, as shown in Patent Document 1, the overbed table is provided with a pair of extendable support columns at both ends in the longitudinal direction of the elongated table plate, and a table plate at the lower end of each support column. Elongate legs are provided in a direction perpendicular to the longitudinal direction, casters are provided on both ends of the legs, and a pulley mechanism is provided for extending and contracting a pair of extendable struts. The basic structure is provided with a means for fixing the at a desired expansion / contraction position, and is used by moving in the longitudinal direction of the bed and bringing it to a predetermined position.

  The fixing means in the overbed table of Patent Document 1 includes a gas spring with a lock mechanism provided corresponding to one column portion, and a lower side of one longitudinal end portion of the table plate for operating the gas spring. In this configuration, the release mechanism of the gas spring lock mechanism can be released only from one end side of the table plate.

  On the other hand, in the overbed table described in Patent Document 2, in order to be able to release the lock mechanism of the gas spring provided corresponding to the support portion on one side from both ends of the table plate, Provided on both end sides of the table plate, the operating lever on one side can directly operate the lock mechanism of the gas spring by the operating part provided on it, and the operating lever on the other side is operated on one side by the wire The lock mechanism can be operated indirectly by connecting to the lever.

  As shown in Patent Document 1 and Patent Document 2, in the conventional overbed table, the table plate of the overbed table is raised as in the case where the floor portion of the bed is raised while the overbed table is used. When an external force is applied below the table plate, a safety mechanism is not provided for enabling the table plate to be raised and preventing breakage.

  On the other hand, in Patent Document 3, a table plate is cantilevered at the upper end of an extendable column that is erected on one side of a base provided with casters, and is moved in the width direction of the bed and brought to a predetermined position. This bedside table allows the table plate to be lifted when an external force is applied below the table plate, such as when the bed floor is raised during use. A safety mechanism for preventing damage is described.

  In this safety mechanism, when an external force in the direction of lifting from the bottom is applied to the table board by raising the floor of the bed, the table board rotates and rises together with its support frame. The operation lever is operated to release the lock operation of the lock mechanism of the gas spring.

  Since this safety mechanism is based on the condition that the table plate is tiltably supported, it cannot be applied to an overbed table having column portions on both ends of the table plate.

Japanese Utility Model Publication No. 58-114132 JP 7-265134 A Japanese Patent No. 2778683

  In the present invention, it was devised in view of the above-described prior art, and when an external force is applied below the table plate, such as when the bed floor is raised during use, It is an object of the present invention to provide a safety mechanism in an overbed table for operating the spring lock mechanism and releasing the lock so that the table plate can be lifted to prevent breakage.

  In order to solve the above-described problems, in the present invention, a pair of extendable struts are provided at both ends in the longitudinal direction of the elongated table plate, and a gas spring is provided corresponding to one strut, An operation lever for pushing the unlocking member provided on the upper end side of the gas spring is rotatably provided at both ends of the table plate, and the pushing lever for pushing the unlocking member is provided on the one operation lever. An overbed table having a structure in which a moving member is provided, an interlocking wire is stretched between the operating levers on both sides, and the operating lever on the one side can be operated by the operating lever on the other side via the interlocking wire. A mechanism element casing is provided on the lower side of the plate, and the interlocking wire is stretched in the vicinity of the bottom plate of the casing by a guide wheel. In response, a long hole is formed, and the elongated operating member loosely fitted in the long hole is supported in the long hole so that its lower surface protrudes downward from the bottom plate of the casing and is movable upward. We propose a safety mechanism for the overbed table.

  Further, in the present invention, in the above-described configuration, the support rod body in the width direction longer than the width of the long hole is protruded on both ends of the elongated operating member, and the support rod body is engaged from the inside of the casing to the periphery of the long hole. The safety mechanism in the overbed table which supported the elongate operation member so that a movement was possible upwards was proposed.

  In the present invention, a gas spring is provided corresponding to the support portion on one side, and an operation lever for pushing the lock release member provided on the upper end side of the gas spring can be rotated at both ends of the table plate. When an overbed table using a mechanism that allows these operation levers to be operated in conjunction with an interlocking wire has been used reasonably and the floor of the bed has been raised during use. As shown in the figure, when an external force is applied below the table plate, the gas spring lock mechanism is operated and the lock is released to allow the table plate to be lifted to prevent damage. can do.

FIG. 1 is a perspective view of an overbed table according to the present invention as viewed obliquely from above. FIG. 2 is a perspective view of the overbed table according to the present invention as viewed obliquely from below. FIG. 3 is a perspective view of the overbed table according to the present invention as viewed obliquely from above with the table plate removed. FIG. 4 is a schematic cross-sectional view of the overbed table according to the present invention as seen from the front side with the table plate removed. FIG. 5 is a schematic cross-sectional view showing an enlarged main part of FIG. FIG. 6 is a schematic cross-sectional view of the overbed table according to the present invention as viewed from the front side in a state different from FIG. 4 with the table plate removed. FIG. 7 is a schematic cross-sectional view showing an enlarged main part of FIG. FIG. 8 is a schematic cross-sectional view of the overbed table according to the present invention as viewed from the front side in a state different from FIGS. 4 and 6 with the table plate removed.

Next, an example of an overbed table to which the present invention is applied will be described with reference to FIGS.
First, in the figure, reference numeral 1 denotes an overbed table. The overbed table 1 is provided with a pair of extendable support columns 3a and 3b at both ends in the longitudinal direction of an elongated table plate 2, respectively. The leg portions 3a and 3b are provided with elongate leg portions 4a and 4b in a direction perpendicular to the longitudinal direction of the table plate 2, and casters 5 are provided on both ends of the leg portions 4a and 4b.

  The gas spring 6 is provided corresponding to the support column 3a on one side, and the operation levers 8a and 8b for pushing the unlocking member 7 provided on the upper end side of the gas spring 6 are provided at both ends of the table plate 2. It is provided in the part so that rotation is possible. The operation lever 8a on one side is provided with a pushing member 9 that pushes the unlocking member 7, and the interlocking wire 10 is stretched between the operation levers 8a and 8b on both sides, so that the operation on the other side is performed. By operating the lever 8b, the one-side operation lever 8a can be operated via the interlocking wire 10, and thereby the lock release member 7 can be pushed. Thus, by operating the operation lever 8b on the other side, the operation lever 8a on the one side can be operated via the operation wire 10, so that the operation wire 10 is provided on the front side of the operation lever 8b on the other side. A guide portion 11 is formed for moving downward and pulling. In the figure, the symbol o indicates the rotation axis of the operation levers 8a and 8b.

  Reference numeral 12 denotes a casing provided on the lower side of the table plate. The casing 12 is appropriately provided with a guide wheel 13 so that the interlocking wire 10 is stretched in the vicinity of the bottom plate 14 of the casing 12. And while forming the long hole 15 corresponding to the interlocking | linkage wire 10 in the baseplate 14, while making the elongate operation member 16 loosely fitted in this long hole 15 project below the bottomplate 14 of the casing 12, It is supported in the long hole 15 so as to be movable upward.

  In other words, in this embodiment, support rods 17 in the width direction, which are longer than the width of the long holes 15, are provided on both ends of the elongated actuating member 16, and the support rods 17 are disposed in the casing 12. The elongated operating member 16 is supported so as to be movable upward by engaging with the periphery of the long hole 15.

  In FIG. 3, reference numeral 18 denotes a wire constituting a pulley mechanism for moving the right and left support columns 3 a and 3 b up and down in conjunction with each other, and the pulley mechanism is described in Patent Document 1 and Patent Document 2. An appropriate configuration similar to the above can be used.

  4 and 5 show a state in which neither of the operation levers 8a and 8b is operated. In this case, the operation levers 8a and 8b are provided by a return spring and a stopper not shown. , Maintained in a position not to operate.

  When the operating lever 8b is rotated counterclockwise in the figure in this state, the guiding portion 11 of the operating lever 8b lowers the interlocking wire 10 downward as shown in FIGS. 6 and 7, so that the interlocking wire 10 is pulled. The operation lever 8a is rotated clockwise in the figure. Accordingly, since the pushing member 9 pushes the lock release member 7 by this rotation, the lock of the gas spring 6 is released and the expansion and contraction is possible. In this manner, the height of the table plate 2 can be adjusted by expanding and contracting the support columns 3a and 3b.

  4 and 5, when the operating lever 8a is directly rotated clockwise in the figure, the pushing member 9 pushes the lock releasing member 7, so that the lock of the gas spring 6 is released and the telescopic member is expanded and contracted. Is possible. In this manner, the height of the table plate 2 can be adjusted by expanding and contracting the support columns 3a and 3b.

  In this way, the operation of any of the operation levers 8a and 8b can release the lock mechanism of the gas spring 6 provided on the support column 3a on one side, and the support columns 3a and 3b can be expanded and contracted.

  Here, in the state of FIGS. 4 and 5, when the floor of the bed is raised and the member 19 at the top of the bed comes into contact with the bottom of the table plate 2, the member 19 is first moved to the elongated operating member 16. Abutting against the bottom surface of the and lifting it upward.

  As shown in FIG. 8, when the elongated actuating member 16 is lifted, the interlocking wire 10 is lifted along with it, and tension is generated in the interlocking wire 10. Therefore, the operating lever 8a is pulled by the interlocking wire 10 and rotates clockwise in the figure. To turn. Accordingly, since the pushing member 9 pushes the lock release member 7 by this rotation, the lock of the gas spring 6 is released and the expansion and contraction is possible.

  For this reason, even when the floor of the bed continues to rise, the table plate 2 also rises accordingly, so that no excessive force is applied.

  Thus, in the present invention, as described above, the lock mechanism of the gas spring 6 provided corresponding to the support column 3a on one side can be operated by any of the operation levers 8a and 8b provided at both ends of the table plate 2. When the external force is applied below the table plate 10 as in the case where the bed portion of the bed is raised during use by rationally using the interlocking wire 10 for the By operating the lock mechanism and releasing the lock, the table plate 2 can be lifted to constitute a safety mechanism for preventing breakage.

DESCRIPTION OF SYMBOLS 1 Overbed table 2 Table board 3a, 3b Support | pillar part 4a, 4b Leg part 5 Caster 6 Gas spring 7 Unlocking member 8a, 8b Operation lever 9 Pushing member 10 Linking wire 11 Guide part 12 Casing 13 Guide wheel 14 Bottom board 15 Length Hole 16 Elongated operation member 17 Support rod 18 Wire 19 Member o Rotating shaft

Claims (2)

A pair of extendable struts are provided at both ends in the longitudinal direction of the elongated table plate, and a gas spring is provided corresponding to one strut, and an unlocking member provided on the upper end side of the gas spring is provided. An operation lever for pushing operation is provided at both end portions of the table plate so as to be rotatable. A push member for pushing the unlocking member is provided on one operation lever, and between the operation levers on both sides. In the overbed table constructed such that the interlocking wire is stretched and the one side operation lever can be operated by the other side operation lever via the interlocking wire, the mechanism element casing is provided below the table plate. The interlocking wire is stretched by the guide wheel in the vicinity of the bottom plate of the casing, and a long hole is formed in the bottom plate corresponding to the interlocking wire. An elongate actuating member for fitting, secure the overbed table, characterized in that the lower surface thereof along with protrudes downward from the bottom plate of the casing and supported in the long hole so as to be movable upward mechanism. A support rod body in the width direction longer than the width of the long hole is protruded from both ends of the elongated operation member, and the support rod body is engaged with the periphery of the long hole from inside the casing, so that the elongated operation member is moved upward. The safety mechanism for an overbed table according to claim 1, wherein the safety mechanism is movably supported.

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