JP2013042888A - Bedside table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating/lowering bedside table in which a pair of collective locking/unlocking operation levers for casters are arranged in side parts or bottom part of a table part and also in the neighborhood of an elevating/lowering lever, thereby the operation of these levers is simplified and completed at one time.SOLUTION: The bedside table includes the table part 11 which is vertically elevated/lowered. In the bedside table, a caster operation lever 21 for collectively and simultaneously performing locking and unlocking operations on all the casters of leg parts is arranged in the side part or bottom part of the table part 11 and also in the vicinity of a table elevating/lowering operation lever 16.

Description

  The present invention relates to a bedside table in which a table placed on a hospital bed or the like can be moved up and down.

  Conventionally, a bed that can be moved up and down, such as a bedside table, is arranged on a hospital bed or the like, and the legs of the table are arranged in parallel with two frames, and one frame is a floor under the bed. The two casters with lock levers are provided at the end of each frame, and a total of four casters with lock levers are arranged to provide a table for meals and medical activities. It is used as By the way, usually, the bedside table has no caster lock because it is difficult to lock the caster under the bed, and it can easily move even with a hand on the table board, causing an unexpected accident to the user. was there. Therefore, conventionally, hospitals and the like have instructed a user to avoid being gripped by a bedside table or the like when getting up from the bed or standing up.

Therefore, as disclosed in Patent Document 1, a grounding member that can move up and down is provided on the caster portion of the bedside table, and when locked, the grounding member protrudes downward by stepping on the operation pedal, and the caster floats from the floor. There are proposals to fix and lock the bedside table.
Further, as disclosed in Patent Document 2, the present applicant provides an operation device on the leg portion that can lock and release the caster of the bedside table by a single operation, so that the bedside table can be easily Has proposed a bedside table fixing device that can fix and release.

JP 2002-136370 A JP 2011-5219 A

By the way, the lock mechanism of the bedside table disclosed in Patent Document 1 and Patent Document 2 is basically painful for nurses and bed users when operating in places close to the floor. However, there is a problem that it requires a lot of force and has to be operated multiple times on both sides of the bed, which is particularly troublesome for busy nurses. A table has been proposed in which four casters can be locked and unlocked simultaneously by operating the operation unit at the place, but the caster operation unit is on the table, which disturbs meals and medical procedures. There was a point.
There are two types of control levers: the table lift control lever and the caster lock or release control lever, but the caster lock / release collective control lever is separated from the table lift control lever. I was sometimes confused by the operation procedure.

  An object of the present invention is to provide a lifting / lowering table such as a bedside table, in which four casters are locked / released by placing a collective operation lever on the side or bottom of the table, and flattening the upper surface of the table to allow for a meal or medical treatment. The table caster lock makes it easy to perform these operations by concentrating the table lifting and lowering operations and the caster lock / release operation in one place. A device is provided.

In order to solve the above-mentioned problem, the invention of claim 1 is a bedside table in which the table can be moved up and down, and a caster operation lever for simultaneously locking and unlocking all the casters of the legs is provided. It is the bedside table provided in the side part or the bottom part.
According to a second aspect of the present invention, in the bedside table according to the first aspect, the operation lever is disposed in the vicinity of the lift table operation lever.
According to a third aspect of the present invention, in the bedside table according to the first or second aspect, the operation of locking and unlocking the casters from the caster operating portion is performed by a coaxial operation transmission wire, and the operation accompanying the raising and lowering of the table. The storage of the relaxed portion of the branch wire, which is a transmission wire, is absorbed by the hollow portion of the table or the storage portion on the bottom surface.
According to a fourth aspect of the present invention, in the bedside table according to the first, second, or third aspect, locking and unlocking operations from the pair of caster operation portions to each caster are performed by a coaxial operation transmission wire, and at least It is characterized by interposing a wire branching mechanism for operating branching wires to all casters by operating one of the caster operating levers.

According to the bedside table of the present invention, since the caster operation lever is not provided on the table, the table upper surface can be made wide and flat so as not to interfere with meals, etc. Since the caster operating lever for locking / releasing is provided, the operation part of the bedside table can be concentrated, and the user is less confused by the operation.
In addition, since the caster operation lever is provided on the side or bottom of the bedside table, the caster can be locked / released at once by using a caster operation lever that is close to the user. Complete in 1 time.
In this way, all casters of the bedside table can be locked and unlocked with a single operation, and there is no need to lock each caster as in the past, especially for busy nurses and users. Since the table portion is provided with a caster operation portion that also serves as a table lifting operation, the patient and nurse can easily finish the table lifting operation and the caster lock / release operation with a single operation.

In addition, since the operation transmission mechanism using the operation transmission wire is used for the lock / release operation of the casters, unlike the conventional link mechanism combination, the structure is simple, the production cost is low, and the number of parts is low. Since one operation wire is branched into four, the four casters can be accurately and simultaneously locked and released with a very simple configuration.
Furthermore, since the height of the wire branching mechanism can be made thin and small, the height of the hollow part can be made thin, and a large space is required to absorb the relaxation of the branching wire accompanying the lifting and lowering of the table part. Since the section (reservoir) is provided under the table, it is compact as a whole, can be designed neatly without any restrictions in design, and the length of the branch wire to each caster can be almost equal. The locking and unlocking operation can be performed uniformly.

In the bedside table of the embodiment of the present invention, an external perspective view of a state in which the two-wheel caster of the caster operation unit is locked, Rear view of FIG. In the bedside table of the embodiment of the present invention, an external perspective view of the state in which the double wheel caster of the caster operation unit is unlocked, Rear view of FIG. FIG. 1 is a perspective view of the bedside table of FIG. 1 in a state where the table portion is lowered and the two-wheel caster of the caster operation portion is locked. 6 (a) is a top view of FIG. 1, FIG. 6 (b) is a cross-sectional top view of the wire storage mechanism in the hollow portion of the table portion, FIG. 6B is a longitudinal sectional view taken along line bb in FIG. The top view of the back of the leg in the bedside table of the embodiment, FIG. 9A is a side view of the internal mechanism of the caster operation lever in which the table portion in FIG. 1 is fixed and the caster is locked, and FIG. 9B is a side view in the middle of operating the caster operation lever by hand. FIG. 9 (c) is a side explanatory view of the internal mechanism of the caster operating lever for explaining the state in which the caster operating lever is lifted to unlock the double wheel caster, FIG. 9 is a front view from the side of FIG. The top view inside a caster operation part from the bottom of FIG. The side view of the caster lock release holding lever of FIG. 1 is an overall configuration diagram of the operation transmission mechanism of FIG. 14 (a) is an enlarged exploded view of one end portion of the lever connecting wire of FIG. 13, FIG. 14 (b) is an enlarged exploded view of the lever connecting wire of part A, FIG. 15 (a) is an enlarged exploded side view of the branch wire of B part of FIG. 13, FIG. 15 (b) is an enlarged exploded view of the branch wire of the other terminal part of FIG. 16 (a) is a front view of the inside of the wire branch board 32 of FIG. 13, FIG. 16 (b) is a side sectional view of the state in which the wire branch board at line aa of FIG. 16 (a) is covered. FIG. 1 is a schematic external perspective view of the twin-wheel caster of FIG. FIG. 18 (a) is a front view and FIG. 18 (b) is a side view of one wheel portion of a twin-wheel caster. FIG. 19 (a) is a front perspective view of a state in which the knock member is raised and the tooth portion 542 is fitted to the internal gear 45, and FIG. 19 (b) is its knock. Side perspective view of the member, 19 is a cross-sectional view taken along line (a)-(a) in FIG. FIG. 21 (a) is a front perspective view of the double wheel caster in the unlocked state, and FIG. 21 (b) is a side perspective view of the knock member. A plan view from above of the caster mounting bracket of FIG. A perspective view of the base portion 541 of the wheel tooth meshing lock portion 54, FIG. 24A is a front view, FIG. 24B is a side view, and FIG. 24C is a top view of the slider cam.

The present invention is a lifting table that can be moved up and down, such as a bedside table, and a table lifting lever is arranged on the side of the table. Similarly to the table lifting lever, all the casters of the legs are attached. The caster operation lever that performs the lock / unlock operation at the same time collectively is arranged on the table lift lever on the side or bottom, the caster operation part is removed from the table, the table lift control lever and the caster lock / release control lever To achieve the initial goal by simplifying the operation.
Here, the Example applied to the suitable bedside table of this invention is described along drawing. Of course, it goes without saying that the caster lock device of the present invention can be applied to a side bed table and other lifting tables.

(Table part and support part)
FIG. 1 and FIG. 2 which is the rear view thereof show a bedside table 1 which is a kind of a lifting table, and a table lifting operation lever 16 is arranged at the center of the side of the bedside table 1. 16 is lowered by a spring or the like in the apparatus, the height of the table portion 11 is fixed, and by moving up and down the table lift operation lever 16, the table portion 11 can be moved up and down and adjusted to an appropriate height. When the operating lever is released, the table raising / lowering operating lever 16 is automatically lowered to fix the table portion 11 at a predetermined height. This table elevating mechanism employs a known mechanism, and the description of this elevating mechanism is omitted.
In addition, a caster operation lever 21 is disposed in the vicinity of the table elevating operation lever 16 at the center of the side portion 113 of the bedside table 1. The caster operation lever 21 constitutes the caster operation unit 2, which will be described in detail.
In FIG. 1 and FIG. 2 which is the rear view thereof, the operation lever 21 is lowered (solid line in the figure), the table portion 11 of the bedside table 1 is fixed at a predetermined position in the vertical direction, and the two-wheel caster is locked. It is a figure which shows a certain whole.

3 and FIG. 4, which is a rear view thereof, show the operation lever 21 of the caster operation unit 2 (FIG. 3: solid line) in a state where the table elevating operation lever 16 is used and the table unit can be moved up and down. FIG. 5 is a view showing the entire state in which the bedside table 1 is movable with the casters 4 (4a, 4b, 4c, 4d) unlocked, and FIG. It is a figure which shows the whole which set the caster 4 (4a, 4b, 4c, 4d) to the locked state.
As shown in these drawings, the bedside table 1 is disposed on the side (side) of a bed D such as a hospital, and the bedside table 1 mainly includes an upper table portion 11 and a support column portion 12 that supports the table portion 11. It is comprised from the leg part 13 corresponding to it.
The upper surface of the table portion 11 is kept flat and horizontal, and is used for meals and the like. The table portion 11 is supported by an extendable and cantilever-supported support column 12, and the support column 12 is Usually, in order to adjust the height of the table portion 11 located on the bed D, the length of the column portion 12 is adjusted by a table elevating operation lever 16 which is also extendable and is also a height adjusting lever. .
Further, the leg portion 13 has two caster mounting frame bodies 132 (132a, 132b) arranged in parallel, and one caster mounting frame body 132b extends toward the opposite side along the floor under the bed D, respectively. Two casters with lock levers are provided at the ends of the caster mounting frame main bodies 132a and 132b.

The column portion 12 is composed of an upper quadrangular column table support portion 122 and a small-diameter quadrangular column base portion 123 that fits and slides inside the support portion 122. Thus, the degree of fitting of the base portion 123 to the support portion 122, that is, the height of the table portion 11 is adjusted.
Further, the entire periphery of the edge of the table portion 11 is provided with an edge portion 111 (see h in FIG. 7) that is slightly higher than the table portion 11, and even if the table is slightly shaken and the liquid overflows from the container, the table portion Since the entire circumference of the 11 edge portions 111 is made high, even if liquid spills on the table, it does not drip from the table. However, it goes without saying that it may be perfectly flat if there is no need for these.
The base portion 123 is fixed by a column fixing member 131 provided on the leg portion 13. This support fixing member 131 may be appropriately designed according to the shape of the various support sections 12 of the bedside table 1 to be used, and can usually be applied to many bedside tables.

Further, as shown in FIG. 1, the column fixing member 131 protrudes outward from the caster mounting frame main body 132a. Although the column fixing member 131 is disposed outside the bed D, the caster mounting frame main body 132a It arrange | positions so that it may be located in the lower side of the bed D, and it prevents it from protruding outside the bed D as much as possible so that a user may not trip.
The leg portion 13 is connected to the column portion 12 corresponding to the leg portion 13 by the table portion 11, and each leg portion 13 is composed of an opposite parallel caster mounting frame main body 132 a, 132 b and a connecting frame body 133 that connects the legs. Two-wheel casters 4a and 4b are attached in the vicinity of both ends of the caster mounting frame main body 132a on the support column 12 side of the portion 13 (see FIG. 1), and the caster mounting frame main body 132b at the end (opposite side) of the connecting frame 133 is attached. Twin wheel casters 4c and 4d are also mounted near both ends. When the bedside table 1 is moved, all of the twin wheel casters 4a to 4d are unlocked, and in the locked state, they are fixed in place and the bedside table 1 is fixed. Has a shape that does not move or fall.

(Wire storage mechanism)
As shown in FIG. 6A, the upper surface of the table portion 11 is flat and the edge portion 111 is slightly higher, but the caster operation lever 21 does not exist and is flat.
As shown in FIG. 6 (b), the table elevating operation lever 16 is disposed at an appropriate position on the left side portion 113 of the table unit 11, and the caster operation unit 2 is provided at the side portion or the bottom portion in the vicinity thereof or at an intermediate position thereof. The caster operation levers 21 connected to the caster operation unit 2 are respectively arranged toward the outer periphery.
The caster operation lever 21 is preferably located at an appropriate position outside the periphery of the table unit 11 that can be easily operated by a patient, a nurse, or the like.
As shown in FIG. 6 (b), the table portion 11 is formed with a hollow portion 112, and an operation transmission wire 30 for connecting the caster operation portion 2 and the twin wheel casters 4 (4a, 4b, 4c, 4d) and a wire to these. The branch board 32 is housed, and the wire housing mechanism 14 is housed for housing the operation transmission wire 30 that expands and contracts.

As will be described later, the operation transmission wire 30 is composed of one lever connecting wire 31 and four branch wires 33 connected to the four twin wheel casters 4 (4a, 4b, 4c, 4d). A wire branch board 32 is interposed between 31 and the four branch wires 33.
In FIG. 6B, one end of the lever connecting wire 31 is connected to the caster operating lever 21, and the other end is connected to one end of the wire branch board 32.
When the inner wire 312 of the lever connection wire 31 of the lever connection wire 31 is pulled, the first wire branch board 32 is connected to the other end of the wire branch board 32 by moving the slider 322 in the wire branch board 32. The four branch wires 33 (33a, 33b, 33c, 33d) are configured to be pulled to one end of the inner wire 332.

There are a total of four branch wires 33. Since the leg portions 13 correspond to the two caster mounting frame bodies 132a and 132b, the two branch wires 33a and 33b connected to the twin wheel casters 4a and 4b and the twin wheel casters 4c are used. It is divided into two branch wires 33c and 33d connected to 4d, and is inserted into a wire guide hole 151 connected to an extendable pipe 15 that forms a wire guide portion housed in the table column portion 12.
The telescopic pipe 15 is composed of a hollow upper pipe 15a having a slightly larger diameter at the upper part and a hollow lower pipe 15b having a slightly smaller diameter at the lower part, and the lower pipe 15b is inserted into a hollow inner hole of the upper pipe 15a. The upper pipe 15a can be slid up and down, the upper end of the upper pipe 15a is fixed to the bottom of the table portion 11, the lower end of the lower pipe 15b is fixed to the upper surface of the leg portion 13, and two branch wires 33 are inserted and guided into the hollow portion. ing. In addition, the upper end of the upper pipe 15a is provided with a curved guide portion (not shown) so that the branch wire 33 that relaxes in the vicinity of the joint with the wire guide hole 151 of the table portion 11 can be easily put in and out. .
The branch wire 33 (33a, 33b, 33c, 33d) repeats a state of relaxation and no relaxation as the table unit 11 is raised and lowered. When the table unit 11 is lowered, the symbol A (bold line) in FIG. ) In a meandering or curved state as shown in FIG. 6B, when the relaxed portion is accommodated in the hollow portion 112 and the table portion 11 is lifted, the state becomes as indicated by the symbol B (thin line) in FIG. The branch wire that is not loosened is stored. It should be noted that the guide wall 141 may be disposed at an appropriate position in the hollow portion 112 so as to be smoothly curved when the branch wire 33 is relaxed.

The telescopic pipe 15 forming the wire guide portion is housed inside the table support column 12 that expands and contracts as the table unit 11 moves up and down, and is provided in parallel to the table support column 12, and its height is expanded and contracted. It is the same height (length) in synchronization with the table support column 12 to be performed. Of course, the telescopic pipe 15 is not limited in that the branch wire 33 accompanying the lifting and lowering of the table is loosened in the vicinity of the table column, and the operation may be smooth.
The lever connecting wire 31 from the caster operating part 2 of the table part 11 is branched into four at the wire branching board 32, and further into two sets of branching wires (33a, 33b) and (33c, 33d) at the leg part 13. As shown in FIG. 8, it is led from the through hole 134 for wire communication at the lower end of the telescopic pipe 15 to the caster mounting frame bodies 132a and 132b and connected to the twin-wheel casters 4a to 4d.
By the way, by providing the caster operating part 2 on the table part 11, the wire branch board 32 can be fixed to the hollow part 112 of the table part 11 in a free position. Therefore, in this embodiment, the wire branch board 34 is attached to the table part 11. Therefore, the lengths of the branch wires 33 from the wire branch board 34 to the twin wheel casters 4a to 4d can be made substantially equal, and the lock and unlock operations of the twin wheel casters can be made to work uniformly.

  Although details of the operation of the caster lever 21 on the table portion 11 will be described later, the wheel lock mechanisms 5 of the four twin wheel casters 4 are connected via the operation transmission mechanism 3 using coaxial wires of the inner wire and the outer wire. Manipulate. This operation wire is equivalent to a brake wire for bicycles, etc., and consists of a core inner wire and an outer wire that covers and fixes both ends. By pulling up the lever 21 (FIG. 9C), the inner wire is pulled to release the lock of the wheel lock mechanism 5 of the twin-wheel caster 4, and conversely, the operation lever 21 is moved to the lifting mechanism, the spring of the caster lock mechanism, etc. (Fig. 9 (a)) and the wheel lock mechanism 5 is locked by a spring.

(Caster operation part)
The details of the following operation structure will be described.
FIGS. 1 and 2 are external perspective views in which four twin-wheel casters are locked by the caster operating unit 2, and FIGS. 3 and 4 are external perspective views in which the caster operating unit 2 is in a released state. This will be described in detail.
First, with reference to FIGS. 9 (a) to 9 (c), FIG. 10, FIG. 11, FIG. 12, and FIG. The caster operation unit 2 mainly includes an operation lever 21, a rotating shaft 22, a wire end (ball) locking unit 23, a wire guide pulley 24, a wire covering (outer periphery) locking unit 25, a rotary stopper 26, a caster. It consists of an unlocking holding lever 27 and a case 28.

9A, the caster operation lever 21 rotates about the rotation shaft 22, and the wire end (ball) locking portion 23 and the rotation stoper are integrally formed with the caster operation lever 21. The locking portion 211 and the lock holding locking portion 212 also rotate. Normally, the inner wire 312 of the lever connection wire 31 (operation transmission wire 30) is always pulled by the spring force of the caster lock mechanism via the second wire branch board 35 and each branch wire 33 (FIG. 9 ( a) on the right). Accordingly, the caster operating lever 21 has an end 311 of the inner wire 312 locked to the wire end (ball) locking portion 23. As a result, the operating lever 21 is turned counterclockwise and lowered (FIG. 9A), and is normally locked and fixed by the spring of the wheel lock mechanism 5.
It should be noted that the rotating stopper stopper 211 locks the rotating stopper 26 fixed to the case 28 so that the caster operation lever 21 does not rotate excessively.

When the nurse or patient wants to adjust the height of the table portion 11 of the bedside table 1 or to move the bedside table 1, it is shown in FIG. 9 (c) and FIG. 9 (b) during the operation. As described above, the operation lever 21 is raised upward.
9C, when the caster operation lever 21 of the caster operation unit 2 is given, the operation lever 21 is connected to the lever via the wire branch board 35 and each branch wire 33 against the spring force of the caster lock mechanism. The wire 31 is pulled to the left in the figure, and the caster operation lever 21 is lifted up to the lever housing recess 17 of the table bottom 114. As a result, the operation lever 21 turns clockwise as shown in FIG. 10C and releases the lock against the spring of the wheel lock mechanism 5.

In this state, the bedside table 1 is movable, but the caster operation lever 21 must be lifted by hand. Therefore, when maintaining the movable state for a long time, the caster lock release holding lever 27 is pulled. Even if the lock portion is engaged with the lock holding engagement portion 212 and the hand is released, the caster operation lever 21 remains in the raised state (FIG. 9c), and when the movement is completed, the caster lock release holding lever 27 can be returned. For example, the caster operation lever 21 is in the original state (FIG. 9A), and is locked and fixed by the spring of the wheel lock mechanism 5.
However, the caster lock release holding lever 27 may be deleted in order to prevent the lock from being accidentally unlocked even in a normal state where the wheel must be locked.

(Operation transmission mechanism)
As shown in FIG. 13, the operation transmission mechanism 3 uses a coaxial so-called lock wire that is coaxial with the inner wire of the core and an outer wire that is also a covering portion. The operation transmission wire 30 includes a lever connecting wire 31 (31a, 31b) and four branch wires 33 (33a, 33b, 33c, 33d).

  The lever connecting wire 31 attached to the caster operating part 2 is composed of a core inner wire 312 and a covering part 313 which is an outer wire covering the core as shown in FIG. A spherical end portion 311 a is provided at the tip of the inner wire 312, and a mounting fixing portion 314 is provided at the tip of the covering portion 313, so that the inner wire 312 can move forward and backward with respect to the mounting fixing portion 314. The other end 311b (see FIG. 14a) is connected to the wire branch board 32. The terminal portion 311b on the opposite side of the lever connecting wire 31 is cylindrical as shown in FIG. 14 (a), and is connected to the fitting portion 3221 (see FIG. 16) of the wire branch board 32.

  Here, the configuration of the wire branch board 32 will be described with reference to FIG. 16. As shown in FIGS. 16 (a) and 16 (b), the first wire branch board 32 of the wire branch mechanism has a lid 321 (see FIG. 16). A slider 322 is housed in a movable manner in the left and right inside the opening 16 (b). Attach the mounting fixing part 314 of the lever connecting wire 31 to the side plate 323a on the lever connecting wire 31 side of the wire branch board 32, and the side plate 323b on the opposite side of the slider 322 corresponds to the end 321b of each wire, The end portion 321b is fitted into a fitting portion 3221 composed of a semi-cylindrical half-cylindrical portion 32212 and a through groove 32212 whose ends are released.

Further, as shown in FIG. 16 (b), which is a sectional view taken along the line aa in FIG. 16 (a), the slider 322 is provided at the end of the inner wires 332 of the four branch wires 33 (33a, 33b, 33c, 33d). Since the moving distance of the end portion 331a must be the same, a plurality of peak portions 3223 parallel to the moving direction of the upper surface of the slider 322 are provided, and the peak portion 3223 is left and right as shown in the side view in which the lid 321 is fitted. A guide groove 3211 that guides in the direction is provided in the lid 321 so that the slider 322 accurately translates with respect to the wire axis. Of course, conversely, a parallel peak may be provided on the lid 321 and a corresponding guide groove may be provided on the slider. A fixing convex portion 3212 is inserted and fixed to the inner wall of the wire branch board 32 on the fitting side surface of the lid 321.
Therefore, as a parallel advance / retreat movement means for moving the slider 322 in parallel with the advance / retreat direction of the inner wires 312, 332, as well as the both side walls inside the wire branch board 32, this alone is not sufficient for parallel movement. Therefore, a plurality of parallel peaks 3223 are provided on the upper surface of the slider 322, and guide grooves 3411 for guiding the peaks 3223 in the left-right direction are also provided on the lid 321 side.

Next, the structure and function of the wire branch board 32 and the branch wire 33 will be described.
The branch wire 33 (33a, 33b, 33c, 33d) is as shown in FIG. 15, and one of the branch wires 33 (33a, 33b, 33c, 33d) is shown in FIG. 15 which is an enlarged view of the symbol B in FIG. The end portion of the wire 332 is provided with an end portion 331 having an engagement hole at the center thereof, the end of the cover portion 333 is provided with a mounting fixing portion 334, and the inner wire 332 is attached. The end portion 331 is configured to be able to advance and retract with respect to the fixing portion 334.
Thus, one end 331a (FIG. 16 (b)) is the same as the end 331b of the lever connecting wire 31 and has a cylindrical shape, and is connected to four twin wheel casters 4 (4a, 4b, 4c, 4d). The terminal portion 311b (FIG. 16 (a)) is different only in that a fitting hole is provided in order to connect to the lock mechanism frame 51, and the other description is omitted.

As described above, the mounting and fixing portion 314 of the side plate 323 a is attached to the one lever connecting wire, and the end portion 311 b of the inner wire 312 of the lever connecting wire 31 is fitted to the fitting portion 3521 of the slider 322. Similarly, the attachment fixing portion 334 of the four branch wires 33 is also attached to the side plate 323b, and one end portion 331a of the branch wire 33 (33a, 33b, 33c, 33d) is also fitted to the fitting portion 3221. ing.
With such a configuration, when the end portion 311b of the lever connecting wire 31 is pulled, the slider 322 moves to the side plate 323a side (FIG. 16: right direction), but the four ends fitted to the slider 322 The part 331a is also moved away from the side plate 323b at once (FIG. 16: right direction).

Thus, the advance / retreat movement of the lever connecting wire 31 is transmitted to the four branch wires 33 via the wire branch board 32. Moreover, since the coaxial wire was used for operation transmission, as shown in FIG. 8, the position of the four twin-wheel casters 4 of the leg portion 13 of the bedside table 1 can be freely set, and a combination of link mechanisms, Unlike the grounding member for lifting the entire table as in the above-mentioned Patent Document 1, the structure is simple, the production cost is low, and the maintenance is easy. Furthermore, since the lever connecting wire 31 is basically branched from one to four branch wires 33 (33a, 33b, 33c, 33d), the four casters can be accurately and simultaneously used with a very simple configuration. Since the wire branch board 32 can be formed thin and flat because it can be locked and unlocked, the height of the wire branch mechanism can be reduced and thin, so that it can be stored in the hollow portion 112 of the bedside table 1 or the table portion 11. It can also be attached to the bottom of the.
In other words, one lever connecting wire 31 from the caster operating section 2 is branched into four branch wires 33 and connected to a caster operating mechanism which is four wheel lock mechanisms 5, and either one of the lever connecting wires is connected. The forward / backward movement of the inner wire 312 of the wire 31 is transmitted to the forward / backward movement of the inner wire 332 of the four branch wires 33, and the wire branch board 32 serves as a wire branch mechanism for branching to the four branch wires 33. The wire branch board 32 is provided with a slider 322 for fixing the four end portions 331 of the branch wires 33 (33a, 33b, 33c, 33d) in parallel, and the slider 322 is moved forward and backward with the inner wires 312 and 332. The movement can be accurately transmitted in parallel with the direction.

(Arrangement of twin wheel casters)
FIG. 8 described above is a plan view of the back surface of the leg portion 13 of the bedside table 1, and a pair of caster mounting frame bodies 132a, b and a pair of twin-wheel casters 4 (4a, 4b, 4c, 4d) across the bed D. In the present embodiment, the caster mounting frame main bodies 132a and 132b are arranged so as to be pulled into the bed D side.
The outline of the outer appearance of these casters 4 is as shown in FIG. 17, and the details of the configuration of the casters 4 will be described later. A pair of wheels is provided on both sides of the lock mechanism frame 51 of the wheel lock mechanism 5 which is a caster operating mechanism. 41A and 41B are rotatably supported, and a turning support 52 is provided on the upper surface of the lock mechanism frame 51 for pivotally supporting the caster 4 with respect to the mounting frame. A knock member 531 that moves up and down is provided coaxially with the axis X of the portion 52. When the knock member 531 is pushed up by the pressing spring 543, the two-wheel caster 4 is locked and the wheel 41 cannot rotate. On the contrary, when the knock member 531 is lifted up and released downward, the tooth portion 542 to the internal gear 45 of the double wheel caster 4 is released, the lock is released, and the double wheel can freely rotate.
By the way, the twin-wheel casters 4 (4a, 4b, 4c, 4d) used in this embodiment are more stable than the single-wheel casters because the width of the twin wheels is wider than that of the single wheels. Locking can prevent turning because of the wide width of the twin wheels as well as the direction of travel.
Therefore, as in this embodiment, when the four casters are locked, even if the lock mechanism of one of the four casters is incomplete or damaged, the bedside table is surely secured. Can be fixed and released.

(Caster wheel)
The wheel portion 41 of the above-described twin wheel caster 4 will be described. As shown in FIG. 17, one wheel portion 41 (41A, 41B) is arranged on each side of each of the four twin wheel casters 4, As shown in FIG. 18, in one wheel portion 41, the wheel shaft 42 is rotatably supported by a wheel bearing portion 511 of the wheel lock mechanism 5 (see FIG. 19), and the wheel shaft fixing portion 43 of the wheel portion 41 is supported. (The wheel shaft fixing portion 43 may be configured to rotatably support the wheel). The outer ring 44 of the wheel portion 41 is made of rubber and absorbs vibrations, smoothes running, reduces noise, and strengthens the grip to the floor.
Also, an inner gear 45 coaxial with the wheel shaft is formed in the vicinity of the outer ring 44 inside the wheel portion 41 of the twin-wheel caster 4, and when a lock tooth portion 542, which will be described later, is lifted by a pressing spring 543, the inner gear The tooth portion 542 meshes with 45 to prevent the wheel portion 41 from rotating.

(Caster wheel lock mechanism)
As described with reference to FIG. 17, the caster of the present embodiment is a twin-wheel caster of wheels 41 </ b> A and 41 </ b> B having a predetermined interval across the lock mechanism frame 51 of the wheel lock mechanism 5. Compared to the driving stability. Further, when both wheels (double wheels) of the wheels 41 (41A, 41B) are locked, the vehicle cannot travel and the turning of the caster is restricted. Further, as in this embodiment, the pair of leg portions 13 of the bedside table 1 is used. When the two wheel casters 4a and 4b at the two ends of the frame 132 and the wheels 41A and 41B of the two wheel casters 4c and 4d are fixed, the rotation of the wheels can be performed without fixing the turning of the caster 4 itself. It is found that the bedside table 1 is almost completely fixed only by fixing, and is based on this knowledge.

First, the wheel lock mechanism 5 of the twin wheel casters (4a to 4d) disposed on the caster mounting frame main body 132 (132a, 132b) will be described in more detail with reference to FIGS.
FIG. 19 is a view of the caster locked state, in which the knock member 531 is loosened by the branch wire 33, the slider cam 56 is moved to the left side by the coil spring 567, and the knock portion 53 is raised upward. 22 (a) is a transverse sectional view of the wheel lock mechanism 5, and FIG. 19 (b) is a side sectional view of FIG. 19 (a). FIG. 20 is a cross-sectional view taken along the line aa in FIG. 20A, and shows a state in which the tooth portion 542 is fitted and locked to the internal gear 45 of the twin wheel caster 4.
FIG. 21 is a diagram of the unlocked state of the twin-wheel caster 4 with the tooth portion 542 separated from the internal gear 45. The knock member 531 is pulled by the branch wire 33, and the slider cam 56 resists the tensile force of the coil spring 567. Is moved to the right side in the drawing, and the tooth portion 542 is lowered against the pressing spring 543 inside the caster, that is, the caster is unlocked, and FIG. It is a top view from above.

  FIGS. 19 (a) and 19 (b) are diagrams showing the normal state of the bedside table 1, that is, the state in which the operation lever 21 is lowered in FIG. In the frame 51 of the mechanism 5, a turning support portion 52 is pivotally supported so that the two-wheel caster 4 can turn with respect to the caster mounting bracket 55, and a knock portion 53 that moves up and down is provided inside the turning support portion 52. Then, following the knock part 53, a wheel tooth meshing lock part 54 is connected via a pressing spring 543. In the state where the tooth portion 542 is raised by the pressing force of the pressing spring 543 by the cam surface 561 of the slider cam 56 that moves the knock member 531 up and down, the wheel tooth meshing lock portion 54 also has the tooth portion 542 The tooth portion 542 is engaged with the internal gear 45 inside the wheel portion 41, the rotation of the wheels 41A and 41B is prevented, and the twin-wheel caster 4 is locked.

Here, the configuration of each part will be described in more detail. First, the lock mechanism frame 51 is formed of plastic, and as shown in FIG. 19, a wheel bearing 511 is provided at the center, and the frame 51 On the left side, a cylindrical fitting portion 512 into which the swivel support portion 52 (knock portion 53) is inserted and a storage portion 513 are arranged, and the portion of the fitting portion 512 adjacent to the caster mounting bracket 55 is the two-wheel caster 4 A projecting wheel 514 is provided for smooth turning, and a storage portion 515 for storing a wheel tooth meshing lock portion 54 that moves up and down and a pressing spring 543 is disposed above the wheel bearing portion 511. The fitting part 512 of the twin-wheel caster 4 including the storage part 515 and the turning support part 52 are firmly supported in a freely rotatable manner, but the turning support part 52 is firmly fixed to the caster mounting bracket 55 side.
In addition, the storage part 513 has an opening on the lower side and one side (a dust cover may be provided if necessary), which is fixed to the caster mounting bracket 55 during assembly work. The turning support washer 523 and the stopper (fixed snap ring) 524 are attached so that the turning support portion 52 to be rotated can be freely rotated on the fitting portion 512.
After the swivel support part 52 is inserted into the fitting part 512, a swivel auxiliary washer 523 is inserted into the lower end of the swivel support part 52, and a stopper (fixed snap ring) 524 provided at the lower end of the swivel support part 52 In order to fix the turning support portion 52 to the fixed circumferential groove 525, the snap ring 524 is locked so that the lock mechanism frame 51 does not fall out of the turning support portion 52.

  Furthermore, a base portion 541 of a wheel tooth meshing lock portion 54 is attached to a lower end portion of a knock member 531 of the knock portion 53, and this base portion 541 is shown in FIG. The lower horizontal portion 5411, the upper horizontal portion 5412, and a connecting portion 5413 that connects the lower horizontal portion 5411, the upper surface of the lower horizontal portion 5411 is the lower tip of the knock member 531 The upper horizontal portion 5412 is engaged with the upper end portion of the spring 543 that is pressed and pressed outward so that the tooth portion 542 is fixed to the upper horizontal portion 5412. An upper spring engaging portion 544 is provided. The lower end portion of the pressing spring 543 engages with the lower spring engaging portion 545 provided on the lock mechanism frame 51 side, and the upper spring engaging portion 544 on the lower surface of the upper horizontal portion 5412 is always pressed upward. Yes.

(Swivel support part and knock part)
Next, the fitting part 512, the turning support part 52, and the knock member 531 in FIG. 19 will be described.
The fixed support cylinder member 521 of the turning support portion 52 is a metal cylinder (pipe), and its upper end is fixed to the bottom plate 554 of the metal caster mounting bracket 55 by welding or the like. Here, as shown in FIG. 17, the turning of the twin wheel caster 4 means that the vertical line of the ground contact point X2 of the normal twin wheel caster 4 and the ground contact point X1 of the shaft center of the knock member 531 are eccentric. When the bedside table 1 is moved, the traveling direction of the twin wheel caster 4 is automatically directed to the moving direction. Naturally, the twin wheel caster 4 does not rotate when the twin wheel caster 4 is locked. However, when the bedside table 1 is not in a locked state, it must be freely turned. Therefore, a protruding wheel 514 is interposed between the turning support portion 52 and the bottom plate 554 of the caster mounting bracket 55 so that the turning on the upper surface of the lock mechanism frame 51 is smooth.
The swivel support part 52 constitutes the swivel shaft of the caster and fits and stores a knock member 531. The knock part 53 can freely move up and down by the concentric fitting part 512 of the swivel support part 52. It is mated.

(Wheel tooth meshing lock)
As shown in FIG. 23, the base portion 541 has a U-shaped cross section of the base portion 541 (from the opposite side, an inverted U-shape) at the central portion (in FIG. 22) of the lower surface of the upper horizontal portion 5412. An upper spring engaging portion 544 that locks the upper end of the pressing spring 543 is provided, and a pair of two tooth portions 542a on the left and right so as to be fitted to the internal gears 45 of the pair of wheel portions 41 of the twin-wheel caster 4. , b are fixed, and are configured to always push upward by a pressing spring 543 that presses outward.
Therefore, as shown in FIGS. 18 and 20, the tooth portions 542a and b of the wheel tooth meshing lock portion 54 are always pushed upward by the pressing spring 543 and lifted up unless the knock member 531 is restricted. In the normal case where the bedside table 1 is installed in the vicinity of the bed, the tooth portions 542a and b are engaged with the internal gear 45 of each twin wheel caster 4 by the pressing spring 543 to prevent the rotation of the twin wheel caster 4. Therefore, the bedside table 1 cannot be moved.
Note that the vertical movement of the wheel tooth meshing lock portion 54 is lowered and raised along the side wall of the guide groove 516 of the storage portion of the wheel tooth meshing lock portion 54 provided in the lock mechanism frame 51.
Further, a concentric internal gear 45 is formed on the wheel shaft 42 in the vicinity of the outer ring 44 inside the wheel portion 41 of the twin-wheel caster 4, and when the tooth portions 542 a and b rise, the tooth portions 542 are formed on the internal gear 45. Prevents the wheel 41 from rotating.

(Caster mounting bracket and slider cam)
The slider cam 56 for operating the caster mounting bracket 55 and the knock member 531 in FIGS. 21 to 24 will be described.
The lever connection wire 31 is pulled by the operation of raising the operation lever 21 (see FIG. 9) of the caster operation unit 2, and the four branch wires 33 are also pulled by the wire branch board 32. Furthermore, the inner wire 332 of each of the branch wires 33a, 33b, 33c, and 33d is pulled, but this has a slider-like cam mechanism attached to the caster mounting bracket 55 that converts this into movement of the knock portion 53. This is a slider cam 56.
As shown in FIG. 24, the slider cam 56 is mainly provided with a cam surface 561 whose flat shape is flat and whose lower surface is inclined. At one end in the direction in which the slider cam 56 moves, the end portion 331 of the branch wire 33 is provided. Is attached, mounting fixing part 334 is attached to front plate 551 (see FIG. 22) of caster mounting bracket 55, lever connecting wire 31 and branch wire 33 (33a, 33b, 33c, 33d: see FIGS. 11 and 16) As a result, the entire body is moved horizontally. As shown in FIGS. 21, 22, and 24, a guide elongated hole 564 is provided in the central portion in parallel with the horizontal upper surface 563 of the slider cam 56, and both side plates of the caster mounting bracket 55 are provided in the guide elongated hole 564. A guide shaft 565 fixed to 552 is fitted.

One end of the coil spring 567 in the contracting direction is locked to the locking portion 566 opposite to the locking portion 562, and the other end of the coil spring 567 is locked to the locking portion 568 of the back plate 553 of the caster mounting bracket 55. The coil spring 567 returns the slider cam 56 to the position shown in FIG. 20 when the lever connecting wire 31 and the branch wire 33 are relaxed. As shown in FIG. 22, the axis of the guide shaft 565 intersects with the axis of the upper tip 532 of the knock member 531.
In FIG. 22, both side plates 552 of the caster mounting brackets 55 (four in total) are provided with frame body mounting portions 555, and bolts (not shown) are provided at both ends of the caster-attached frame bodies 132 a and 132 b. Etc.) and so on.

Therefore, the upper end 532 of the knock member 531 comes into contact with the cam surface 561 of the slider cam 56, but in the unlocked state where the branch wire 33 is pulled, as shown in FIGS. Since the cam surface 561 moves from the left side to the right side, the cam surface 561 is at the lowest point 5611 which is the lowest position, and the knock member 531 is pushed downward.
On the contrary, as shown in FIGS. 19 and 20, when the lever connecting wire 31 and the branch wire 33 are relaxed, the slider cam 56 is moved to the left side by the coil spring 567 as shown in FIGS. The cam surface 561 is at the highest point 5612 which is the highest position, and by the action of the pressing spring 543 of the tooth portion 542, the upper end portion 532 of the knock member 531 is also raised, and the tooth portion 542 is also raised, The inner wheel 45 of the caster 4 is fitted, and the twin-wheel caster 4 is maintained in a locked state.
This flat slider cam 56 operates so that the uppermost point 5612 moves from the lowermost point 5611 of the cam surface 561 to the upper end portion 532 of the knock member 531, but the end portion 331 of the branch wire 33 of the slider cam 56 The movement distance Z (see FIG. 19) is substantially the same as the distance Y (see FIG. 24) from the lowest point 5611 to the highest point 5612 of the cam surface 561.
Therefore, the distance from the lowest point 5611 to the highest point 5612 can be changed by the inclination angle of the cam surface 561, so that the height of the caster mounting bracket 55 is kept low and the distance (stroke) of the branch wire 33 is adjusted. Can do.

(Caster lock / unlock operation)
Since the terminal operating device for fixing the bedside table 1 of the present embodiment has the above-described configuration, it operates generally as follows.
As shown in FIG. 1 (FIG. 2), the caster 4 unlocking operation lever 21 (also used for lifting the table) provided on the leg 13 of the bedside table 1 locks the caster 4 in a normal installation state. When the bedside table 1 is moved, as shown in FIG. 3 (FIG. 4), the operation lever 21 for maintaining the release is lifted upward, and the caster 4 is unlocked.
To bring the caster 4 of the bedside table 1 into the original locked state and fix the height of the table unit 11, the operation lever 21 is released from the hand, and the spring in the table lifting mechanism 23 or the lock mechanism in the caster 4 is used. Due to the spring of the pulling force of the wire, the operation lever 21 is naturally lowered and the table portion 11 is fixed and the twin wheel caster 4 is locked.

[Lock state of twin wheel caster]
The twin wheel caster 4 is locked as shown in FIG.
In the normal state where the bedside table 1 is arranged in the vicinity of the bed, the operation lever 21 is automatically positioned below (see FIG. 9).
As a result, the branch wire 33 has the tooth portion 542 fitted to the caster internal gear 45 by the pressing spring 543 in the caster, the knock member 531 is also above the pressing spring 543, and the branch wire 33 is also in a relaxed state. Although the state in this case lasts for a long time, it is not necessary to keep the operation lever 21 in a state where the wire 31 is always pulled, so that each wire is not in a tensioned state (relaxed state), and the wire stretches over time. And the maintenance of the device becomes easy.
[Unlocking condition of twin wheel caster]
The unlocked state of the twin-wheel caster is as shown in FIG.
In this case, in the state where the bedside table 1 is moved, the operating lever 21 is raised, the lever connecting wire 31 is pulled up to be in a tensioned state, and the knock member 531 is pushed downward by the branch wire 33, resulting in the caster. The tooth portion 542 is released from the internal gear 45 of the caster against the inner pressing spring 543. Therefore, when the operation lever 21 is raised, the twin wheel caster is in the unlocked state, and the bedside table 1 can be moved.

Since the present embodiment is configured as described above, in an elevating table such as a bedside table, an operation lever that can collectively lock / release casters is provided on the side of the bedside table. Since it is placed at the bottom, it can be placed in the vicinity of the table elevating lever, and the caster operating lever is not provided on the table as in the past, so the table top is wide and flat so as not to disturb food It is possible not to interfere with medical practice, and a neat design is possible.
Further, since the caster operation lever for locking / releasing the casters is provided in the vicinity of the table elevating operation lever, the operation part of the bedside table can be concentrated, and the user is less confused by the operation. In addition, since the caster operation lever is provided on the side of the bedside table, using the caster operation lever close to the user enables the locker / unlock of the casters to be operated at once, making the operation simple and one-time operation. Complete.
In this way, all casters of the bedside table can be locked and unlocked with a single operation, and there is no need to lock each caster as in the past, especially for busy nurses and users. Since the table portion is provided with a caster operation portion that also serves as a table lifting operation, the patient and nurse can easily finish the table lifting operation and the caster lock / release operation with a single operation.

In addition, since the operation transmission mechanism using the operation transmission wire is used for the lock / release operation of the casters, unlike the conventional link mechanism combination, the structure is simple, the production cost is low, and the number of parts is low. Since one operation wire is branched into four, the four casters can be accurately and simultaneously locked and released with a very simple configuration.
Furthermore, since the height of the wire branching mechanism can be made small and thin, the height of the hollow part can be made thin, and a large space is required to absorb the relaxation of the branching wire accompanying the lifting and lowering of the table part. Since the section (reservoir) is provided under the table, it is compact as a whole, and there is no restriction on the design, and a neat design is possible. The length of the branch wire to each caster can be almost equal, and the caster The locking and unlocking operation can be performed uniformly.
Further, even if the table is slightly shaken and the liquid overflows from the container and spills on the table, the entire circumference of the edge 111 of the table portion 11 is increased (see h in FIG. 7), so that the liquid drips from the table. There is no.
In addition, since the telescopic pipe 15 serving as the wire guide portion is provided in the table column portion, the branch wire 33 accompanying the raising and lowering of the table portion 11 is not loosened near the table column portion 12 and is exposed to the outside. Because there is no entanglement, the operation is smooth and a clean design is possible.
Needless to say, the present invention is not limited to the above-described embodiments as long as the features of the present invention are not impaired. For example, although the caster operating lever is the side or bottom of the table, it may be provided at a plurality of places where it is easy to operate if it is not the upper surface of the table.

D. Bed,
1 .... Bedside table, 11 .... Table part,
111 ·· Edge, 112 ·· Hollow, 113 · · Side, 114 · · Bottom
12. ・ Table support,
122 ・ ・ Table support part, 123 ・ ・ Basic part,
13 ・ ・ Leg part, 131 ・ ・ Staff fixing member,
132,132a, 132b ・ ・ Caster mounting frame body,
133 ...
134 ・ ・ Wire communication through hole
14. ・ Wire storage mechanism, 141 ・ ・ Guide wall,
15 ・ ・ Expandable pipe, 15a ・ ・ Upper pipe, 15b ・ ・ Lower pipe,
151 ・ ・ Wire guide hole,
16. ・ Table lifting operation lever,
17. ・ Lever storage recess,
2 ・ Caster operation part,
21, 21a, 21b ... Caster control lever, 211 ... Rotating stopper stopper,
212 .. Lock holding latch
22 ・ ・ Rotating shaft, 23 ・ Wire end (ball) locking part, 24 ・ ・ Wire guide pulley,
25 ・ ・ Wire covering (outer circumference) locking part, 26 ・ ・ Rotating stopper
27 ・ ・ Caster unlock release lever, 28 ・ ・ Case,
3. Operation transmission mechanism, 30 (31, 32, 33) Operation transmission wire
31,31a, 31b ... Lever connecting wire, 311a, 311b ... Terminal part,
312 ... Inner wire, 313 ... Cover (outer wire),
314 ・ ・ Mounting fixing part,
32 ... Wire branch board, 321 ... Lid, 3211 ... Guide groove,
3212 ・ ・ Fixed convex part, 322 ・ ・ Slider,
3221 ・ ・ Fitting part, 32211 ・ ・ Semi-cylindrical part, 32212 ・ ・ Through groove,
3223 ... Yamabe, 323a, 323b ... Side plates,
33 (33a, 33b, 33c, 33d) ・ ・ Branch wire,
331a, 331b ... Terminal end, 332 ... Inner wire,
333 ... Coating part (outer wire), 334 ... Installation fixing part,
4, 4a, 4b, 4c, 4d · Twin wheel casters,
41 ・ ・ Wheel, 41A, 41B ・ ・ Wheel,
42 .. Wheel axle, 43 .. Wheel axle fixing part, 44 .. Outer ring, 45 .. Internal gear,
5. Wheel lock mechanism,
51 ··· Lock mechanism frame, 511 · · Wheel bearing portion, 512 · · Fitting portion,
513, 515 ... Storage part, 514 ... Projection ring, 516 ... Guide groove,
52 .. Rotation support part, 521 .. Fixed support cylinder member, 522 .. Mounting edge part,
523 ・ ・ Swivel auxiliary washer, 524 ・ ・ Stopper (fixed snap ring),
525 ・ ・ Fixed circumferential groove for snap ring,
53 .. Knock part, 531 ... Knock member, 532 ... Upper tip part, 533 ... Lower tip part,
54 .. Wheel tooth meshing lock part, 541 .. Base part,
5411 ... Lower horizontal part, 5412 Upper horizontal part,
5413 ・ ・ Connecting part, 542,542a, 542b ・ ・ Tooth part, 543 ・ ・ Pressing spring,
544 ... Upper spring engagement part, 545 ... Lower spring engagement part
55 ・ ・ Caster mounting bracket, 551 ・ ・ Front plate, 552 ・ ・ Side plate,
553 ... Back plate, 554 ... Bottom plate, 555 ... Frame body mounting part, 556 ... Bolt hole,
56 ・ ・ Slider cam, 561 ・ ・ Cam surface, 5611 ・ ・ Bottom point, 5612 ・ ・ Top point,
562, 566, 568 ... Locking part, 563 ... Horizontal upper surface, 564 ... Guide slot
565 ・ ・ Guide shaft, 567 ・ ・ Coil spring,

9A, the caster operation lever 21 rotates about the rotation shaft 22, and the wire end (ball) locking portion 23 and the rotation stoper are integrally formed with the caster operation lever 21. The locking portion 211 and the lock holding locking portion 212 also rotate. Normally, the inner wire 312 of the lever connection wire 31 (operation transmission wire 30) is always pulled by the spring force of the caster lock mechanism via the second wire branch board 35 and each branch wire 33 (FIG. 9 ( the left side in a)). Accordingly, the caster operating lever 21 has an end 311 of the inner wire 312 locked to the wire end (ball) locking portion 23. lifted, as a result, the operating lever 21 becomes the lowered and rotated in clockwise (FIG. 9 (a)) states, are usually locked by a spring of the wheel lock mechanism 5 fixed.
It should be noted that the rotating stopper stopper 211 locks the rotating stopper 26 fixed to the case 28 so that the caster operation lever 21 does not rotate excessively.

When the nurse or patient wants to adjust the height of the table portion 11 of the overbed table 1 or to move the overbed table 1, FIG. 9 (c) and FIG. 9 (b) during the operation are shown. As described above, the operation lever 21 is raised upward.
9C, when the caster operation lever 21 of the caster operation unit 2 is given, the operation lever 21 is connected to the lever via the wire branch board 35 and each branch wire 33 against the spring force of the caster lock mechanism. The wire 31 is pulled rightward in the drawing, and the caster operation lever 21 is raised to the lever housing recess 17 of the table bottom 114. As a result, the operating lever 21 is in the state shown in FIG. 10 (c) which is rotated counterclockwise to unlock against the spring of the wheel lock mechanism 5.

An object of the present invention is to provide a lifting / lowering table such as a bedside table, in which four casters are locked / released by placing a collective operation lever on the side or bottom of the table, and flattening the upper surface of the table to allow for a meal or medical treatment. so as not to interfere with, and, to concentrate the arrangement and table lifting operations and caster lock / release in operation in the vicinity of the table elevating control lever in one place, the side tables to facilitate these operations It is to provide.

In order to solve the above-mentioned problem, the invention of claim 1 is a bedside table in which the table can be moved up and down, and a caster operation lever for simultaneously locking and unlocking all the casters of the legs is provided. It is the bedside table provided in the side part or the bottom part.
According to a second aspect of the present invention, in the bedside table according to the first aspect, the caster operation lever is disposed in the vicinity of the lift table operation lever.
The invention of claim 3 is the bedside table according to claim 1 or 2, wherein locking and unlocking operation of each caster from the caster operation portion of the caster operation lever is performed by a coaxial operation transmission wire. The storage of the relaxed portion of the branch wire, which is the operation transmission wire accompanying the elevation, is absorbed by the hollow portion of the table or the storage portion on the bottom surface.

The present invention is a lifting table that can be moved up and down, such as a bedside table, and a table lifting lever is arranged on the side of the table. Similarly to the table lifting lever, all the casters of the legs are attached. The caster operation lever that performs the lock / unlock operation at the same time collectively is arranged on the table lift lever on the side or bottom, the caster operation part is removed from the table, the table lift control lever and the caster lock / release control lever To achieve the initial goal by simplifying the operation.
Here, the Example applied to the suitable bedside table of this invention is described along drawing. Of course, it goes without saying that the caster lock device of the present invention can be applied to an overbed table and other lifting tables.

D. Bed,
1 .... Bedside table, 11 .... Table part,
111 ·· Edge, 112 ·· Hollow, 113 · · Side, 114 · · Bottom
12. ・ Table support,
122 ・ ・ Table support part, 123 ・ ・ Basic part,
13 ・ ・ Leg part, 131 ・ ・ Staff fixing member,
132,132a, 132b ・ ・ Caster mounting frame body,
133 ...
134 ・ ・ Wire communication through hole
14. ・ Wire storage mechanism, 141 ・ ・ Guide wall,
15 ・ ・ Expandable pipe, 15a ・ ・ Upper pipe, 15b ・ ・ Lower pipe,
151 ・ ・ Wire guide hole,
16. ・ Table lifting operation lever,
17. ・ Lever storage recess,
2 ・ Caster operation part,
21, 21a, 21b ... Caster control lever, 211 ... Rotating stopper stopper,
212 .. Lock holding latch
22 ・ ・ Rotating shaft, 23 ・ Wire end (ball) locking part, 24 ・ ・ Wire guide pulley,
25 ・ ・ Wire covering (outer circumference) locking part, 26 ・ ・ Rotating stopper
27 ・ ・ Caster unlock release lever, 28 ・ ・ Case,
3. Operation transmission mechanism, 30 (31, 32, 33) Operation transmission wire
3 1.・ Lever connecting wire, 311a, 311b ・ ・ Terminal part,
312 ... Inner wire, 313 ... Cover (outer wire),
314 ・ ・ Mounting fixing part,
32 ... Wire branch board, 321 ... Lid, 3211 ... Guide groove,
3212 ・ ・ Fixed convex part, 322 ・ ・ Slider,
3221 ・ ・ Fitting part, 32211 ・ ・ Semi-cylindrical part, 32212 ・ ・ Through groove,
3223 ... Yamabe, 323a, 323b ... Side plates,
33 (33a, 33b, 33c, 33d) ・ ・ Branch wire,
331a, 331b ... Terminal end, 332 ... Inner wire,
333 ... Coating part (outer wire), 334 ... Installation fixing part,
4, 4a, 4b, 4c, 4d · Twin wheel casters,
41 ・ ・ Wheel, 41A, 41B ・ ・ Wheel,
42 .. Wheel axle, 43 .. Wheel axle fixing part, 44 .. Outer ring, 45 .. Internal gear,
5. Wheel lock mechanism,
51 ··· Lock mechanism frame, 511 · · Wheel bearing portion, 512 · · Fitting portion,
513, 515 ... Storage part, 514 ... Projection ring, 516 ... Guide groove,
52 .. Rotation support part, 521 .. Fixed support cylinder member, 522 .. Mounting edge part,
523 ・ ・ Swivel auxiliary washer, 524 ・ ・ Stopper (fixed snap ring),
525 ・ ・ Fixed circumferential groove for snap ring,
53 .. Knock part, 531 ... Knock member, 532 ... Upper tip part, 533 ... Lower tip part,
54 .. Wheel tooth meshing lock part, 541 .. Base part,
5411 ... Lower horizontal part, 5412 Upper horizontal part,
5413 ・ ・ Connecting part, 542,542a, 542b ・ ・ Tooth part, 543 ・ ・ Pressing spring,
544 ... Upper spring engagement part, 545 ... Lower spring engagement part
55 ・ ・ Caster mounting bracket, 551 ・ ・ Front plate, 552 ・ ・ Side plate,
553 ... Back plate, 554 ... Bottom plate, 555 ... Frame body mounting part, 556 ... Bolt hole,
56 ・ ・ Slider cam, 561 ・ ・ Cam surface, 5611 ・ ・ Bottom point, 5612 ・ ・ Top point,
562, 566, 568 ... Locking part, 563 ... Horizontal upper surface, 564 ... Guide slot
565 ・ ・ Guide shaft, 567 ・ ・ Coil spring,

Claims (4)

  A bedside table in which the table can be moved up and down, and a caster operation lever that simultaneously locks and unlocks all casters of the legs is provided on the side or bottom of the table. .   The bedside table according to claim 1, wherein the operation lever is disposed in the vicinity of the lifting table operation lever.   Locking and unlocking operation to each caster from the caster operation part is performed by a coaxial operation transmission wire, and storing of the loosened part of the branch wire which is an operation transmission wire accompanying raising and lowering of the table is stored in the hollow part of the table or the storage part on the bottom surface The bedside table according to claim 1, wherein the bedside table is absorbed by the bedside table.   Locking and unlocking operation to each caster from the pair of caster operation units is performed by a coaxial operation transmission wire, and a wire for operating branch wires to all casters by operating at least one of the caster operation levers. The bedside table according to claim 1, 2 or 3, further comprising a branching mechanism.

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