JPH0367695B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an interlocking operation mechanism for casters in a supine table such as a bed, an examination table, or a patient carrier.

(Prior art) Mobile supine tables for transferring patients, such as ICU beds, recovery beds, or patient transport vehicles, are equipped with casters at the four corners to enable smooth movement, and these are controlled by an interlocking operation mechanism. A state in which you can operate both straight ahead and change direction at the same time.
The vehicle can be placed in a state in which only straight forward travel is possible or in a locked state in which travel is not possible.

As such an interlocking operation mechanism, there is a conventional structure shown in FIG. 5, for example. This mechanism consists of mounting cylinders c constructed at the four corners of the base frame b of the supine table a.
A support shaft f that rotatably supports the wheel support frame e of the caster d is fitted to and supported, and the left and right casters d forming a pair in the lateral direction on the head side and foot side of the base frame b are connected to each other. An interlocking operation shaft g for operating these is provided, and the interlocking operation shafts g on the head side and the foot side can be interlocked by an interlocking link mechanism consisting of an interlocking arm h and an interlocking link i, and the interlocking operation shaft g An operating pedal j is provided at an appropriate location.

(Problem to be solved by the invention) As mentioned above, in the conventional interlocking operation mechanism,
Since the interlocking operation of the caster d is performed by the operation pedal j provided at the lower part of the supine table a,
A supine table in which the supporting height of the floor part k supported on the base frame b is relatively low, and in which the operation pedal j is placed in a recessed position to prevent the foot from getting stuck when moving the supine table a. In step a, the operation pedal j must be operated in an unstable posture.

It is an object of the present invention to solve such problems and at the same time to facilitate the movement operation of a supine table.

(Means for Solving the Problems) The interlocking operation mechanism of the present invention for achieving the above-mentioned object will be explained with reference to the drawings corresponding to the embodiments. In a movable supine table B in which casters 2 (2a, 2b, 2c, 2d) with a built-in locking mechanism can be operated simultaneously by an interlocking mechanism A, a board 3 on the foot side or head side of the supine table B is provided.
(3a, 3b), the moving operation handle 4 is configured to be movable from the used position to the non-used position, and the board 3 is provided with a control cable drive mechanism C that is linked to the movement of the handle 4. A pair of control cables 5 (5a, 5a,
5b), and the other side of each of the control cables 5 (5a, 5b) is connected to the reciprocating movement member 6 configured at the appropriate position of the interlocking mechanism A, and the driving directions thereof are opposite to each other. The handle 4 and the lock mechanism of the caster 2 are connected to each other, and the handle 3 is set in a used position and a non-used position.
The configuration is such that they correspond to the unlocked position and the locked position of the caster 1, respectively.

Further, in the mechanism according to the present invention, a means for maintaining the locking state and the unlocking state of the locking mechanism is provided at an appropriate location in the mechanism from the moving operation handle 4 to the locking mechanism of the caster 2; The mechanism is characterized in that the moving operation handle 4 is provided with a means for preventing it from moving to a position when it is not in use.

(Function) In the above configuration, if the handle 4 is left in the unused position when the supine table B is not moved,
The casters 2 (2a, 2b, 2c, 2
The locking mechanism d) is held in the locked position, thus allowing the supine table B to be fixedly installed in a predetermined position.

When the supine table B is moved, the movement operating handle 4 is moved from the non-use position to the use position, and the control cable drive mechanism C is activated in conjunction with the movement of the handle 4. The reciprocating member 6 is driven. Due to this drive of the reciprocating member 6, the locking mechanisms of the respective casters 2 are interlocked via the interlocking mechanism A, and the locks are released, so the supine table B becomes movable and can be moved using the handle 4. .

When the supine table B is moved to a predetermined position in this way and the handle 4 is moved from the use position to the non-use position again, the control cable drive mechanism C drives the control cable 5 in the opposite direction.
The locking mechanism is operated via the reciprocating member 6 and the interlocking mechanism A in the opposite manner to that described above to lock the caster 2. Therefore, the supine table B is placed in a fixed state.

In this way, in the present invention, since the control cable 5 is used to drive the interlocking mechanism A of the caster 2, the operating member can be placed at an appropriate position on the supine table B, and at the foot side or head side where it is easiest to operate. It can be installed at the position of the side board 3, and this operation member also serves as the movement operation handle 4 used to move the supine table B, so that the movement operation of the supine table B and the interlocking mechanism A can be performed. Both operations are easy, and it is possible to prevent forgetting to lock and release the caster 2. Further, by configuring means for maintaining the locked state and unlocked state of the lock mechanism at appropriate locations in the above mechanism, it is possible to prevent these states from being unintentionally changed. Furthermore, if the moving operation handle 4 is configured with a means for preventing it from moving to an unused position during use, the handle 4 will not be unintentionally disabled when applying force to move the supine table B. This can prevent it from moving to the use position.

(Example) Next, embodiments of the present invention will be described in detail.

FIG. 1 shows the entire mechanism of a supine table B to which the present invention is applied, and this supine table B supports a floor part 7 above a base frame 1 via a parallel link mechanism P so as to be movable up and down. . In the figure, the drive mechanism of this parallel link mechanism P is omitted. A moving operation handle 4 is rotatably fixed to a board 3a on the foot side of the floor 7. A winding drum 9 is rotatably fitted onto a support shaft 8 that rotatably supports the operating handle 4, and the winding drum 9 rotates together with the handle 4. engaged. The mechanism for rotating the winding drum 9 together with the handle 4 can be constructed as appropriate, and its specific construction is omitted from illustration. A pair of control cables 5a and 5b are connected to the winding drum 9.
The cables 10a, 10b of the control cables 5a, 5b are wound and supported in opposite directions, and the outer casings 11a, 11 of the control cables 5a, 5b are placed on the board 3a at an appropriate distance from the handle 4.
A support member 22 is provided for supporting b, and the support member 22 and the winding drum 9 constitute a control cable drive mechanism C. In addition, winding drum 9
Instead, the control cable drive mechanism C can be constructed by configuring a suitable lever member to rotate together with the handle 4, and fixing the cables 10a and 10b to both sides of the pivot point.

Next, FIG. 3 shows a caster 2 applied to the present invention.
This is an example of the caster 2.
is similar to that disclosed in Japanese Patent Publication No. 50-7336, for example. In this caster 2, a wheel support frame 12 supporting a wheel 11 is rotatably fixed to the lower side of a support shaft 13, and a brake piece 14 whose tip is in contact with the wheel 11 is movable up and down on the wheel support frame 12. A lock member 16 for pressing the upper side of the brake piece 14 is provided at the lower end of an operating rod 15 which is fixed to the support shaft 13 and is movable up and down. Further, the operating rod 15 is urged upward by a spring 17, and a cam 18 for moving it downward is constructed on the support shaft 13. to move the operating rod 15 and lock the locking member 16.
a first position where the brake piece 14 is pressed;
It is held at a second position in contact with the upper side of the wheel support frame 12 and a free third position between these two positions. The first position corresponds to a state in which the vehicle cannot travel, the second position corresponds to a state in which only straight travel is possible, and the third position corresponds to a state in which both straight travel and direction changes are possible. For this reason, the upper side of the brake piece 14 and the lock member 16
Engaging portions 20 and 21 are formed on the lower side of the locking member 16 and the upper side of the wheel support frame 12, respectively, to prevent movement in the turning direction.

The caster 2 having the above structure is fitted and supported by the mounting cylinders 23 formed at the four corners of the base frame 1 of the supine table B, and the cam operating shaft 19 projects in the transverse direction of the mounting cylinders 23. In this way, the actuating rod 15 can be operated from the outside. Therefore, in order to enable interlocking operation of the casters 2 attached to the four corners of the base frame 1 of the supine table B, the cam actuating shafts 19 are attached to the short sides of the base frame 1 on the head side and the foot side, respectively. It is configured as an interlocking shaft between two casters that form a pair in the direction,
Then, the head side and foot side interlocking shafts 19 are connected to the interlocking arms 24.
The interlocking mechanism A is configured to be interlockable with the interlocking link 25 and the interlocking link 25. On the other hand, in the base frame 1, an actuating part 26 of the control cable 5 is configured in the vicinity of the interlocking link 25, and an outer casing 11 is arranged opposite to the actuating part 26 at an appropriate distance.
A, 11b support members 27a, 27b are provided, one end of the reciprocating movable member 6 is configured to be movable between these support members 27a, 27b, and a cable 10 is connected to this end from the respective support members 27a, 27b side.
a and 10b, and the other end of the reciprocating member 6 is rotatably connected to the interlocking link 25.

In the above configuration, when the handle 4 is rotated, the winding drum 9 is rotated in conjunction with the winding drum 9 to wind up the cables 10a, 10b on one side and to unwind the cables 10b, 10a on the other side. Therefore, in the actuating section 26, the cable 10a pulls a part of the reciprocating member 6 in the right direction in the figure, thereby moving the interlocking link 25 and operating the interlocking mechanism A. Then, by rotating the handle 4 in the opposite direction, an operation opposite to the above-described operation can be performed.

In the above embodiment, as shown in FIG.
This corresponds to the unlocked state in the position.
When the handle 4 is laid down on its side, it is at the end of its rotation stroke. Therefore, in this state, the supine table B can be moved by applying a forward and downward force to the handle 4, and The handle 4 does not return to the upright state due to a force in this direction. That is, such a configuration includes means for preventing the handle 4 from moving to a non-use position during use. In addition, such means can be constructed by providing a suitable stop mechanism, and the posture and specific structure of the handle 4 corresponding to the locked state and unlocked state are also suitable. Further, in the above configuration, the cam 18 operates as a means for maintaining the locked state and the unlocked state (the second and third positions), but such means can be configured at an appropriate location in the configuration. .

(Effects of the Invention) As described above, the present invention utilizes the control cable to drive the interlocking mechanism of the casters, so the operating member is placed in the appropriate position on the supine table, and on the foot side or the head side where it is easiest to operate. This operating member also serves as a moving operation handle used to move the supine table, making it easy to move the supine table and operate the interlocking mechanism. This also has the effect of preventing forgetting to lock and release the caster. In addition, in the appropriate place in the above mechanism,
By configuring a means for maintaining the locked state and unlocked state of the lock mechanism, it is possible to prevent these states from changing unintentionally, and furthermore, it is possible to prevent the locking mechanism from changing its state unintentionally. By configuring a means for preventing movement to the use position, it is possible to prevent the handle from unintentionally moving to the non-use position when applying force to move the supine table. effective.

[Brief explanation of drawings]

1 to 3 correspond to embodiments of the present invention, FIGS. 1a and 3b are explanatory perspective views and explanatory side views showing the overall configuration, respectively, and FIGS. 1
Figure 3 is an explanatory longitudinal section of the caster; Figures 4 a and b are explanatory diagrams of the operation of the main parts; Figure 5
The figure is an explanatory perspective view of a conventional example. Code A...Interlocking mechanism, B...Moving supine table, C...
...Control cable drive mechanism, P...Parallel link mechanism, 1...Base frame, 2 (2a, 2
b, 2c, 2d)... Caster, 3 (3a, 3
b)...Board, 4...Movement operation handle, 5
(5a, 5b)...Control cable, 6...
...Reciprocating moving member, 7... Floor section, 8... Support shaft,
9... Winding drum, 10a, 10b... Cable, 11a, 11b... Outer casing, 12
... Wheel support frame, 13 ... Support shaft, 14 ... Brake piece, 15 ... Operating rod, 16 ... Lock member,
17... Spring, 18... Cam, 19... Cam operating shaft, 20, 21... Engaging portion, 22... Support member,
23... Mounting cylinder body, 24... Interlocking arm, 25... Interlocking link, 26... Operating section, 27a, 27b...
Support member.

Claims (1)

[Scope of Claims] 1. In a movable supine table in which casters with a built-in locking mechanism provided on a base frame can be operated simultaneously by an interlocking mechanism, a handle for movable operation is provided on a board on the foot side or head side of the supine table. The board is configured to be movable from a use position to a non-use position, and the board is provided with a control cable drive mechanism that is linked to the movement of the handle, and the drive mechanism includes a pair of control cables whose drive directions are opposite to each other. Connect one side of each of the control cables of the
The other end of each of the control cables is connected to a reciprocating member configured at an appropriate position of the interlocking mechanism in such a manner that the driving directions are opposite to each other, and the locking mechanism of the handle and caster is interlocked, thereby adjusting the operating position of the handle. 1. A mechanism for interlocking operation of casters in a movable supine table, characterized in that a caster and a non-use position correspond to an unlocked position and a locked position of the caster, respectively. 2. The interlocking operation mechanism described in item 1 is characterized in that a means for maintaining the locked state and unlocked state of the locking mechanism is provided at a suitable location in the mechanism from the moving operation handle to the locking mechanism of the caster. Interlocking operation mechanism of casters in a mobile supine table. 3. A caster for a movable supine table in the interlocking operation mechanism described in paragraph 1, characterized in that the movable operating handle is provided with a means for preventing the movable operating handle from moving to a position of non-use during use. interlocking operation mechanism.