JPH02211147A - Interlocking operational mechanism for caster in mobile bed - Google Patents

Abstract

PURPOSE:To facilitate moving operation of a mobile bed and controlling of an interlocking mechanism by providing in a foot or head side board of the lying bed a moving operational handle and a driving mechanism of the caster interlocking mechanism utilizing a control cable associated with this moving operational handle. CONSTITUTION:A moving operational handle 4 is movably constituted from a position in use over to a position in not use while a control cable driving mechanism C, being associated with a movement of the handle 4, is provided, in a foot or head side board 3 of a mobile bed B. Control cables 5a, 5b are connected respectively with one side to the control cable driving mechanism C and the other side to a caster interlocking mechanism A in a condition that both the drive directions are reverse to each other. While the moving operational handle 4 is associated with a lock mechanism of a caster 2 and placed in positions in use and not in use respectively corresponding to a lock released position and a lock position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of 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.

(Conventional technology)! , C, U, beds, recovery beds, patient transport vehicles, etc., which are used for transporting patients, are equipped with casters at the four corners to enable smooth movement.
These are simultaneously operated by an interlocking operation mechanism, so that the vehicle can be placed in a state where it can run straight and change directions, a state where it can only travel straight, and a locked state where it cannot travel.

As such an interlocking operation mechanism, there is a conventional structure shown in FIG. 5, for example. In this mechanism, a support shaft f that rotatably supports a wheel support frame e of a caster d is fitted into mounting cylinders C formed at the four corners of a base frame b of a supine table a, and the base frame b Interlocking operation shafts q for operating the left and right casters 6, which form a pair in the lateral direction on the head and foot sides, respectively, are provided, and the interlocking operation shafts q on the head and foot sides are connected to an interlocking armrest. Interlocking is possible by an interlocking link mechanism consisting of an interlocking link i, and an operating pedal j is provided at a suitable position on an interlocking operation shaft q.

(Problem to be Solved by the Invention) As described above, in the conventional interlocking operation mechanism, the interlocking operation of the casters d is performed by the operation pedal j provided at the lower position of the supine table a, so the base frame b In supine table a, the supporting height of the floor supported above is relatively low, and the operating pedal j is located at a recessed position to prevent feet from getting stuck when moving on supine table a. must operate the operating pedal j 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 Problem) The interlocking operation a side of the present invention for achieving the above-mentioned object will be explained with reference to the drawings corresponding to the embodiments.The interlocking operation mechanism of the present invention includes: Casters 2 with built-in locking mechanism installed in frame 1
(2a, 2b, 2c, 2d) can be operated simultaneously by the interlocking mechanism A. The handle 4 is configured to be movable from a used position to a 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, and the drive mechanisms C have drive directions opposite to each other. In a state where
While connecting one side of each of a pair of control cables 5 (5a, 5b), the control cables 5
(5a, 5b) are connected to a reciprocating member 6 configured at an appropriate position of the interlocking mechanism A in such a manner that the driving directions are opposite to each other, and the lock 8N structure of the handle 4 and caster 2 is interlocked. The used position and non-used position of the handle 3 are made to correspond to the unlocked position and locked position of the caster 1, respectively.

The present invention further provides that, in such a mechanism, a means for maintaining the locking state and unlocking state of the locking mechanism is configured at an appropriate location from the moving operation handle 4 to the locking mechanism of the caster 2, and further, The mechanism is characterized in that the moving operation handle 4 is provided with a means for preventing it from moving to an unused position during 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 control cable drive mechanism 01, the control cable 5, the reciprocating etc. operating member 6, and the interlocking mechanism are connected to each other. Caster 2 (
2a, 2b, 2c.

The locking mechanism 2d) is held in the locked position, and thus the supine table B can 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 driving of the reciprocating member 6, the locking mechanism of each caster 2 is interlocked via the interlocking mechanism A, and the lock is released, so the supine table B becomes movable and can be moved using the handle 4. .

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

In this way, in the present invention, the control cable 5
is used to drive the interlocking mechanism A of the casters 2, so the operating member can be installed at an appropriate position on the supine table B and at the position of the board 3 on the foot side or head side where it is easiest to operate, Since this operating member also serves as the moving operation handle 4 used to move the supine table B, it is easy to move the supine table B and operate the interlocking mechanism A, and lock the gear star 2. It is possible to prevent forgetting to cancel the operation. Further, by configuring means for maintaining the locked state and the unlocked state of the lock R structure 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 overall mechanism of a supine table 8 to which the present invention is applied, and this supine table B supports a floor part 7 above a base frame 1 so as to be movable up and down via a parallel link mechanism P. . In the figure, the driving force 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. Cables 10a, 10b of a pair of control cables 5a, 5b are wound around and supported by the winding drum 9 in opposite directions. A support member 22 that supports the outer casings 11a and 1b is provided, and the support member 22 and the winding drum 9 constitute a control cable drive machine 5tctr*. In addition, in place of the winding drum 9, a suitable lever member is configured to rotate together with the handle 4, and the cables 10a and 10b are fixed on both sides of the rotation fulcrum to configure a control cable drive mechanism C. can do.

Next, FIG. 3 shows an embodiment of a caster 2 applied to the present invention, and this gear star 2 is similar to that disclosed in, for example, Japanese Patent Publication No. 7336/1983. 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. and fixed to the support shaft 13.
A locking member 16 for pressing the upper side of the brake piece 14 is provided at the lower end of an actuating rod 15 that is vertically movable. Further, the actuating rod 15 is urged upward by a spring 17, and a cam 18 for moving the actuating rod downward is attached to the support shaft 1.
3, and this cam 18 crosses the support shaft 13.
6. The operating rod 15 is moved by the rotation of the operating shaft 19, and the first rotor member 16 is pressed against the brake piece 14.
, a second position in contact with the upper side of the wheel support frame 12, and a free third position between these 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 brake piece 14
Engaging portions 20 and 21 are formed on the upper side and the lower side of the locking member 16, and on the upper 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 casters 2 having the above configuration are 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 actuating shaft 19 is connected to the mounting cylinder together with the It projects in the transverse direction of the body 23, thus making it possible to operate the actuating rod 15 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 mounted on the short sides of the base frame 1 on the head side and the foot side. Constructed as an interlocking shaft between two casters that form a pair in the direction,
The interlocking shafts 19 on the head side and the foot side can be interlocked with the interlocking vJ arm 24 and the interlocking link 25 to constitute the interlocking fIIJ mechanism A. On the other hand, the interlocking link 2 is attached to the base frame 1.
5, a supporting member 27a of the outer casing 11a, llb constitutes the actuating part 26 of the control cable 5, and is opposed to the actuating part 26 at an appropriate distance.
27b, one end of the reciprocating movable member 6 is configured to be movable between these supporting members 278, 27i), and a cable 10a is connected to this end from the respective supporting members 27a and 27b.
, 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 cable 10a (10b) on either side of the blade and the cable 10b (10b) on the user side. 10a), in the operating section 26, the cable 10a pulls a part of the reciprocating member 6 to the right in the figure, thus moving the interlocking link 25 and operating the interlocking mechanism A. Can be done. 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 FIGS. 3(a) and 3(b), the upright state of the handle 4 is the locked state in the first position, and the horizontally tilted state is in the second position. It corresponds to the unlocked state in the position. The handle 4 is at the end of its rotation stroke when it is laid down on its side. Therefore, in this state, the supine table 8 can be moved by applying a downward and forward force to the handle 4. The handle 4 does not return to the upright state due to directional force. 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 an appropriate stopper mechanism, and the posture and specific configuration of the handle 4 corresponding to the locked state and unlocked state are also appropriate. 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 mechanism. .

(Effects of the Invention) As described above, the present invention uses 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. You can do 1QIif to the position of the board,
This operating member also serves as a moving handle used to move the supine table, so it is easy to move the supine table and operate the interlocking mechanism, making it easy to forget to lock and release the casters. It also has the effect of being able to prevent. Furthermore, by configuring means for maintaining the locked state and unlocked state of the locking mechanism at appropriate locations in the above mechanism, it is possible to prevent these states from changing unintentionally. , on the moving operation handle,
If the means for preventing the handle from moving to the unused position during use is configured in 1, it is possible to prevent the handle from unintentionally moving to the unused position when applying force to move the supine table. The effect is that it can be done.

[Brief explanation of the drawing]

1 to 3 correspond to an embodiment of the present invention, and FIGS. 1(a) and 3(b) are an explanatory perspective view showing the overall configuration, an explanatory side view, and FIG. a) and (b) are enlarged views of the main parts of Fig. 1 (a), Fig. 3 is an explanatory longitudinal sectional view of the caster, Fig. 4 (a) and (b) are explanatory views of the main parts, and Fig. 5
The figure is an explanatory perspective view of a conventional example. Symbol A: interlocking mechanism, B: movable supine table, C...
Control cable drive mechanism, P... Parallel link mechanism, 1... Base frame, 2 (2a, 2b, 2c,
2d)...Caster, 3 (3a, 3b)...Board, 4...Handle for movement operation, 5 (5a, 5b)...
)... Control cable, 6... Reciprocating moving member, 7... Floor, 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, 24...
- Interlocking arm, 25... Interlocking link, 26... Actuation part,
27a, 27b... Support members.

Claims (3)

[Claims] (1) In a movable supine table in which the casters with a built-in locking mechanism provided on the base frame can be operated simultaneously by an interlocking mechanism, the movable operation handle is attached to the board on the foot side or the head side of the supine table from the use position. The board is configured to be movable 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. one side of each of the control cables is connected, and the other side of each of the control cables is connected to a reciprocating member configured at an appropriate position of the interlocking mechanism so that the driving directions thereof are opposite to each other, and a locking mechanism of the handle and caster is provided. are linked, and the use position and non-use position of the handle are
An interlocking operation mechanism for casters in a movable supine table, characterized in that the casters are configured to correspond to an unlocked position and a locked position, respectively. (2) In the interlocking operation mechanism described in paragraph 1, a means for maintaining the locked state and unlocked state of the locking mechanism is provided at an appropriate location in the mechanism from the moving operation handle to the locking mechanism of the caster. Features: Interlocking operation mechanism of casters in a mobile supine table (3) In the interlocking operation mechanism described in item 1, the movable supine table is characterized in that the movable operating handle is provided with a means for preventing the movable operating handle from moving to a non-use position during use. Interlocking operation mechanism for casters