JP2016221120A - Frame rotation structure of bedside - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a rotation structure provided between a fixed frame and a rotating side frame of a bedside.SOLUTION: A frame rotation structure of a bedside comprises: a pressing operation part whose upper end protrudes upward and whose base end is inserted into a movable side cylinder part; an operation member extending downward while being fixed to the pressing operation part, and capable of moving upward and downward inside a rotary shaft part supported pivotally in a fixed side cylinder part; a lifting engagement part for restricting and locking the rotation of the rotary shaft part by engaging with a fixed engagement receiving part; and a combination of a guide part and an engaging projection part, which separates the lifting engagement part from the fixed engagement receiving part and maintains a lock release posture. The rotary shaft part fixed to a movable member can be rotated by each predetermined angle to open and close a rotating side frame with respect to a fixed side frame.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an improvement in a rotation structure provided between a bedside fixed frame and a movable frame.

  Conventionally, as a rotating structure of this type, in the grip for a bed disclosed in Japanese Patent Application Laid-Open No. 2012-71101, a grip portion is provided so that it can be horizontally rotated via a rotating mechanism on one side of a fixed fence portion attached to the bed. In the bed grip, which is provided in a row, a stainless steel pipe with an internal tooth plate fixed to the upper surface is fixed below one side of the fixed fence portion, and an attachment support plate and a lock portion support plate are fixed above. The grip portion is arranged so that the hole portion formed in the mounting support plate and the shaft center of the rotation shaft portion of the lock portion support plate are located on the same line as the shaft center of the outer diameter of the internal tooth plate. An outer tooth plate that meshes with the inner tooth plate is fixed to a lower end portion of a support pipe that constitutes the grip frame, and a cover pipe that covers the inner tooth plate and the outer tooth plate is supported. The lock pipe is inserted into the hole, and the rotation shaft provided on the lock plate is rotatably supported by the lock support plate and a spring is interposed to lock the lock. The plate is biased to rotate upward, and a lock release button is inserted into the guide pipe that is inserted into the hole, and the lock release button rotates the operating piece of the lock plate against the spring. By making it movable, the stopper piece is retracted from the upper sliding area of the support pipe from the state in which the stopper piece provided on the lock plate contacts the upper end of the support pipe of the grip portion by the biasing force of the spring. The grip portion is slidable upward, the meshing between the internal tooth plate and the external tooth plate is released, and the horizontal rotation is possible Configuration provided with the rotating mechanism comprising Te is disclosed.

Moreover, in the assistance apparatus of Unexamined-Japanese-Patent No. 2011-87803, the assistance rail which is fixed to the side frame of a bed and prevents a person being fallen from a bed and becomes a handrail, and the assistance rail is horizontally rotated. An assisting arm which is attached in a possible manner to prevent the person being assisted from falling from the bed and which serves as a handrail;
An assistance device comprising a lock mechanism that prohibits rotation of the assistance arm with respect to the assistance rail, wherein the locking mechanism is provided on the assistance rail, on the assistance arm, and on the upper member. A lower member attached to the upper member so as to be pivotable in the horizontal direction, a shaft member that is movable integrally with the lower member in the vertical direction, and that penetrates the upper member, and a vertical rotation on the shaft member. A lock lever that is movably attached, and the lock lever is rotated so that the lower member and the shaft member are pulled vertically upward with respect to the upper member, and between the upper member and the lower member. The disposed clutch is engaged to be in the first locked state, and the lock lever is released from the first locked state. Chromatography is pushed further the shaft member side in a horizontal direction, arrangement having a locking mechanism comprising a second lock state is disclosed.

In the former, the lock release button is pushed down and the stopper piece of the lock plate is separated from the upper end of the support pipe to form a space between the operating piece and the support pipe. Can be unlocked and rotated.
Therefore, it is necessary to release the lock by lifting the grip member through the support pipe exposed to the outside while pressing the lock release button, and the support pipe needs to be rotated. was there.
In the latter case, the clutch is engaged or disengaged by moving the upper member closer to or away from the lower member by the displacement of the cam at the tip of the lock lever pivotally attached to the shaft member. Since the support arm connected to the lower member is rotated around the shaft member in a state in which the lock lever is maintained, when an unintended force is applied to the lock lever, the engagement state returns to the engaged state. .

JP 2012-71101 A JP 2011-87803 A

  The present invention has been devised in view of the above circumstances, and its main problem is that when the pressing operation portion for unlocking is depressed, the turning restriction lock of the movable side frame is released and the fixed side frame side is released. An object of the present invention is to provide a simple structure of a bedside frame rotation structure that can rotate a rotation-side frame by rotating the rotation-side frame at a certain angle or rotating the rotation-side frame to an arbitrary angle.

In order to solve the above-mentioned problems, the present invention provides
In the rotating structure that controls the rotation and locking of the rotation side frame provided between the bedside fixed side frame and the rotation side frame,
A fixing member having a fixed side cylindrical portion provided on the fixed side frame;
A movable member formed on the rotation side frame and having a movable side cylindrical portion provided coaxially with the fixed side cylindrical portion;
A pressing operation part whose upper end protrudes upward and a base end is inserted into the movable side cylinder part or the fixed side cylinder part and is urged upward in the unlocking direction, and an operation member fixed to the pressing operation part and extending downward When,
A rotating shaft that is fixed to the movable member and that is rotatably supported in the hollow of the fixed side cylindrical portion, and extends vertically along the axis of the rotating shaft, and the operating member is fitted up and down freely. A vertical hole,
A fixed engagement receiving portion having an inner tooth portion fixed to the inner peripheral wall of the fixed-side cylinder portion;
An external tooth portion that engages with and disengages from the internal tooth portion, moves up and down along the outer peripheral surface of the rotating shaft portion in conjunction with the operating member, and is rotatable in conjunction with the rotating shaft portion; It is displaced to a lock position that engages with the engagement receiving portion and a lock release position that is separated from the fixed engagement receiving portion, and the rotation of the rotation shaft portion is restricted at the lock position, and the rotation shaft portion at the lock release position. Elevating engagement part that enables rotation;
A guide part that moves up and down along the outer peripheral surface of the rotating shaft portion in conjunction with the operating member and is rotatable in conjunction with the rotating shaft portion, and has a concave and convex engaging portion on the outer peripheral surface;
Rotating and operating members of the rotating shaft portion that are provided on the inner wall surface of the fixed-side cylinder portion and are detachably engaged with the concave portions of the concave and convex engaging portions of the guide portion at the unlocking position of the lifting and lowering engaging portion. And an engaging part that restrains the upward displacement until a predetermined force is applied to the rotating shaft part.

In the bedside frame rotation structure according to the present invention, when the pressing operation portion for unlocking is pushed down, the lifting engagement portion and the guide portion are pushed down via the operating member. The engagement is released and the rotation shaft portion is brought into the unlocked state where the rotation is possible.
At the same time, the engaging protrusion enters the concave portion of the concave and convex engaging portion of the guide portion, and maintains the unlocked state against the urging force in the locking direction.
The elevating engagement portion and the guide portion are configured to rotate in conjunction with the rotary shaft portion and simultaneously move up and down together with the actuating member, so that the operability can be achieved with a simple configuration for locking or unlocking and maintaining the locked state. Can be improved.
In addition, the outer teeth provided on the lifting engagement part and the inner teeth provided on the fixed engagement receiving part are tapered so that not only the meshing but also surface contact makes the rattling at the time of locking. Can be suppressed.
In addition, since the concave and convex engaging portions are provided on the guide portion so as to be rotatable, only one engaging protrusion such as a ball plunger can be arranged, the number of parts can be saved, and the quality of the component parts can be stabilized. Can be planned.
Moreover, if the bearing part of a rotating shaft part is made into a spacer shape and it is fixed up and down on the inner wall surface of a stationary side cylinder part, rotation of a rotating shaft part can also be stabilized.

It is a side view of a bed side frame rotation structure. It is a top view which shows the case where a rotation side frame is rotated in steps from the closed position lined up with a fixed side frame inward or outward. It is sectional drawing of FIG. It is sectional drawing of a movable side cylinder part. It is principal part sectional drawing which shows a lock position. It is principal part sectional drawing which shows a lock release position. It is a perspective view of a fixing member. It is sectional drawing of a fixing member. It is sectional drawing from another angle of a fixing member. It is a top view of a fixing member. It is a side view of a raising / lowering engaging part. It is sectional drawing of a raising / lowering engaging part. It is a perspective view of a raising / lowering engaging part. It is a side view of a guide part. It is a front view of a guide part. It is sectional drawing of a guide part.

  A preferred embodiment of the bedside frame turning structure of the present invention will be described below with reference to the drawings.

  The frame rotating structure 10 shown in FIGS. 1 to 3 is provided between the bedside stationary frame 1 and the opening / closing rotating frame 11 and controls the rotation and locking of the rotating frame 1. ing.

The fixed side frame 1 is fixed to a mounting shaft portion 2a that protrudes from a fixing member 2 and extends substantially horizontally along the bedside. The fixed side frame 1 has a fixed side cylindrical portion 3 on the distal end side of the fixing member 2. (See FIGS. 6 to 9).
The rotation side frame 11 protrudes from the movable member 12 and is fixed to an attachment shaft portion 12a extending substantially horizontally along the bedside at the closed position. 13 (see FIG. 3).

The movable side cylinder part 13 has a hollow part penetrating vertically, and a pressing operation part 15 in which an upper end protrudes above the movable side cylinder part 13 and a base end is inserted into the hollow part is accommodated.
That is, it is accommodated so as to be able to move up and down in the first hollow portion 13a disposed on the upper portion of the hollow portion.
The first hollow portion 13a incorporates a coil spring 6 that urges the pressing operation portion 15 upward in the unlocking direction.
In the illustrated example, the upper portion of the coil spring 6 is inserted into an annular groove formed below the pressing operation portion 15 to fit the upper portion of the coil spring 6, and the lower end of the coil spring 6 is the first hollow portion. It is supported on the bottom part 13a 'of 13a, and urges the pressing operation part 15 upward to be the rotation lock direction.

A second hollow portion 13b having a small diameter is formed through the bottom portion 13a ′ of the first hollow portion 13a, and a third hollow portion 13c having the same diameter as the first hollow portion 13a at the bottom and having the bottom portion opened. Communicate.
A columnar actuating member 17 fixed to the pressing operation portion 15 and extending downward along the axis is slidably inserted into the second hollow portion 13b.
Further, the upper portion of the rotary shaft portion 16 is fitted into the third hollow portion 13c with almost no gap, and the inner wall of the third hollow portion 13c is locked to restrain the rotary shaft portion 16 from moving in the vertical direction. A projecting portion 13d is provided.
Here, the rotating shaft portion 16 rotates with the rotation of the movable member 12, and the rotating shaft portion 16 is fixed to the movable member 12 or is constrained in the rotation direction so as to rotate in conjunction with it, and rotates integrally. As installed.

The fixed-side cylinder portion 3 has a hollow portion that communicates with the hollow portion of the rotating shaft portion 16 and penetrates in the vertical direction. The first bearing portion 7 is provided above the inner wall of the fixed-side cylinder portion 3, and the lower portion is provided below. A second bearing portion 8 is provided, and a portion of the rotating shaft portion 16 that hangs down from the movable cylinder portion 13 is rotatably supported around the axis (see FIGS. 5A and 5B).
Here, the upper part of the rotating shaft part 16 has a large diameter, and the lower part after the part in contact with the first bearing part 7 is a small diameter shaft part.

  In the case of the illustrated example, the first bearing portion 7 is formed of an annular body having the same cross section with a through-hole that is open at the top and bottom, and the second bearing portion 8 is open at the top and has a large-diameter storage portion 8a inside. A bottomed annular body provided with a bearing hole 8b through which the rotary shaft portion 16 is inserted and supported.

And the upper part of the rotating shaft part 16 is fitted into the above-mentioned third hollow part 13c without a gap, the locking projection part 13d is fitted into the annular concave part in the middle position, and the lower part beyond the concave part is The upper rotating surface 26a that rotates in contact with the one bearing portion 7 has a slightly smaller diameter and a step that is recessed inward is formed, and the inner wall corner portion of the upper surface of the first bearing portion 7 is latched to the step.
Further, the lower portion of the rotating shaft portion 16 becomes a small-diameter lower shaft portion 27 and extends to the lower portion of the fixed-side cylinder portion 3.

The second bearing portion 8 has an outer wall surface fixed to an inner wall surface below the fixed side cylinder portion 3, and the second bearing portion 8 does not move upward by a stepped portion protruding toward the center on the inner wall surface. Is restrained.
As described above, the lower shaft portion 27 of the rotating shaft portion 16 is inserted into the bearing hole 8b of the second bearing portion 8, and the outer wall surface of the insertion portion serves as the lower rotating surface 26b.

A lift engaging portion 18 and a guide portion 20 are attached to the rotary shaft portion 16 along the lower shaft portion 27 so as to be slidable up and down.
In this embodiment, the elevating engagement portion 18 and the guide portion 20 slide on the lower shaft portion 27 via the sliding portion 9.
Here, the sliding portion 9 is provided with an annular flange 9a at the lower end of the cylindrical body, and the lower shaft portion 27 is inserted into the central through hole 9b of the cylindrical body. It can slide up and down in the axial direction along the shaft portion 27.

A cylindrical engagement / fixing receiving portion 4 is fixed to the fixed-side cylindrical portion 3 on an inner wall surface in the middle of the fixed side cylindrical portion 3.
The engagement fixing receiving portion 4 has an inner tooth portion 5 on an inner wall surface (see FIGS. 7 and 9).

On the other hand, as shown in FIGS. 10 to 12, the elevating engagement portion 18 has a large-diameter outer tooth portion 19 that meshes with the inner tooth portion 5 at the upper portion of the cylindrical body.
A latching hollow portion 18 a having a polygonal cross section (square in the illustrated example) is formed inside the outer tooth portion 19, and the latching hollow portion is formed in a small-diameter cylindrical body below the outer tooth portion 19. An expanded hollow portion 18b having an outer periphery larger than the portion 18a is formed.
The latching hollow portion 18a and the expanding hollow portion 18b communicate with each other vertically, and the lower shaft portion 27 of the rotating shaft portion 16 is inserted therethrough.
In the present embodiment, the lower shaft portion 27 has a polygonal shape (square in the illustrated example) corresponding to the cross section of the latching hollow portion 18a, so that the rotation of the rotary shaft portion 16 causes the lower shaft portion 27 to rotate. The raising / lowering engagement part 18 is rotated through.

  The rotation of the rotary shaft portion 16 is restrained by the engagement of the fixed engagement receiving portion 4 and the lifting / lowering engagement portion 18, but in this embodiment, both the inner tooth portion 5 and the outer tooth portion 19 are from above. It is formed in a taper shape that gradually expands downward, and the surface can be contacted at the time of engagement by the meshing so that rotation can be more firmly regulated without wobbling.

The guide portion 20 is formed in a cylindrical shape, and is attached so as to move up and down integrally with the elevating engagement portion 18 below the elevating engagement portion 18 and to rotate in conjunction with the rotary shaft portion 16.
In this embodiment, as clearly shown in FIG. 5, the hollow of the elevating engagement portion 18 that is externally fitted to the lower shaft portion 27 in a state where the cylinder of the sliding portion 9 is externally fitted to the lower shaft portion 27. It fits in the space of the part 18b without a gap, and the lower end of the elevating engagement part 18 is placed on the flange 9a of the sliding part 9.

  A guide portion 20 is fitted on the outer wall surface of the lifting / lowering engagement portion 18 corresponding to the expanded hollow portion 18b below the lifting / lowering engagement portion 18, in the illustrated example, below the external tooth portion 19, without any gap. Is placed on the flange 9 a of the sliding portion 9.

The sliding portion 9, the lifting engagement portion 18, and the guide portion 20 are lifted and lowered integrally with the operating member 17.
That is, a through hole 17a extending in the radial direction is formed in the lower part of the operating member 17, and the connecting pin P is inserted and extends to the left and right.
In this embodiment, the connection pin P uses a spring pin, but may have other pins or screws.

A pair of elongated holes 16b communicating with the vertical holes 16a are formed in the rotary shaft portion 16 at intervals of 180 degrees corresponding to the ascending / descending range at the position where the connecting pin P is attached by the operating member 17.
Since the connecting pin P protrudes left and right through the long hole 16b, the connecting pin P together with the rotating shaft part 16 and the actuating member 17 passes through the long hole 16b when the rotating shaft part 16 rotates. Rotate

Next, the sliding portion 9, the elevating engagement portion 18, and the guide portion 20 are similarly provided with holes through which the connection pins P are inserted at intervals of 180 degrees so as to penetrate the connection pins P. Yes.
In the figure, symbol e is a hole through which the connecting pin P is passed, and has the same diameter as the through hole 17a of the operating member 17, and is pierced so as to be able to communicate with the sliding portion 9, the lifting engagement portion 18 and the guide portion 20, respectively. A pair of holes is shown.
As a result, the lifting and lowering of the operating member 17 is transmitted to the sliding portion 9, the lifting and lowering engaging portion 18 and the guide portion 20 via the connecting pin P, so that the sliding portion 9 and the lifting and lowering engaging portion are integrated with the operating member 17. 18 and the guide part 20 move up and down.
In this embodiment, the elevating engagement portion 18 and the sliding portion 9 slide along the lower shaft portion 27, and the guide portion 20 is raised and lowered by the elevating engagement portion 18 and the sliding portion 9. What is necessary is just the structure to which the raising / lowering engaging part 18, the sliding part 9, and the guide part 20 are displaced up and down with the action | operation member 17. FIG.

As shown in FIGS. 13 to 15, the guide portion 20 has a cylindrical shape and has an uneven engagement portion 21 that protrudes on the outer peripheral surface.
As described above, the connecting pin P is fixed to the operating member 17 together with the sliding portion 9 and the lift engaging portion 18, and the concave and convex engaging portion 21 is located closer to the inner wall surface of the fixed side cylindrical portion 3. Yes.
In this embodiment, the guide portion 20 is externally fitted to the elevating engagement portion 18 so that the uneven engagement portion 21 is closer to the inner wall surface than the external tooth portion 19, but the thickness of the guide portion 20 is increased, It may be directly fixed to the sliding portion 9 or may be slid along the rotating shaft portion 16.

On the inner wall surface of the fixed-side cylinder portion 3, an engagement protrusion 25 that removably engages with the concave portion 22 of the concave-convex engagement portion 21 of the guide portion 20 at the unlocking position of the lifting / lowering engagement portion 18. Is provided.
The guide portion 20 is formed with a band-shaped uneven engagement portion 21 that is annularly raised along the outer peripheral surface thereof.
In the vertical cross section, the concave / convex engaging portion 21 has an inclined surface 21a in which the middle position rises most in the radial direction (thickness direction), the lower part gradually rises toward the middle position, and the upper part is between the middle position. It is composed of a plurality of combinations of a recess 22 in which a stepped portion is formed and a protrusion 23 that is raised on the same plane as the intermediate position and extends to a position above the recess 22.

The engaging protrusion 25 is composed of a plunger whose tip 25a protrudes and protrudes toward the axis of the fixed-side cylinder portion 3, and the concave portion 22 is located at a position where the actuating member 17 is lowered as shown in FIG. It is positioned so that it can be aligned with.
At the same time, at this position, the elevating engagement portion 18 and the fixed engagement receiving portion 4 are disposed so as to be in an unlocked state spaced apart from each other (see FIG. 5B).

Further, at a position where the operating member 17 is lifted by being urged by the upper and lower springs 6 and 14, the outer tooth portion 19 of the elevating engagement portion 18 and the inner tooth portion 5 of the fixed engagement receiving portion 4 are engaged. It will be in a locked state (refer FIG. 3).
Therefore, when the operating member 17 is lowered by depressing the pressing operation portion 15 from the locked state, the external tooth portion 19 of the elevating engagement portion 18 is detached from the internal tooth portion 5 of the fixed engagement receiving portion 4 accordingly. .

The tip 25a of the engaging projection 25 positioned relatively below the guide portion 20 in the locked state is repelled while being pushed inward by the inclined surface 21a of the concave and convex engaging portion 21 when the guide portion 20 is lowered. The tip 25a enters the latching step portion of the concave portion 22 by the repulsive force at the concave portion 22 that passes through the raised portion and is depressed in the thickness direction by increasing the force.
As a result, the upward movement of the actuating member 17 is restricted against the urging force of the coil spring 14 in the locking direction (upward), so that the unlocked state is maintained.

Therefore, when the movable member 12 is rotated via the rotation side frame 11, the engagement protrusion 25 is displaced from the recess 22 onto the protrusion 23 adjacent in the rotation direction.
Therefore, the adjacent recess 22 and the adjacent side wall portion of the protrusion 3 are formed on the inclined surface 21b inclined in the rotational direction of the opening direction by the movable member 12 so that the tip 25a of the engagement protrusion 25 can easily get over. Is preferred.

    Because of the above configuration, when no force is applied to the pressing operation portion 15, the actuating member 17 is in the upper position shown in FIGS. 3 and 5A by the biasing force of the spring, Since the fixed engagement receiving portion 4 is engaged, the rotation side frame 11 is in the fixed frame closed position.

By pushing down the pressing operation portion 15, the operating member 17 is lowered, and the sliding portion 9, the lifting engagement portion 18, and the guide portion 20 are simultaneously lowered via the connecting pin P.
As a result, the elevating engagement portion 18 is shifted downward from the fixed engagement receiving portion 4 to be in an unlocked state, and the tip 25a of the engagement projection 25 is brought into contact with the concavo-convex engagement portion 21 when the guide portion 20 is lowered. The urging force is increased by being pushed into the inner wall surface side of the fixed side cylindrical portion 3, and the tip 25 a is engaged with the recess 22 at a position where the recess 22 of the concavo-convex engagement portion 21 is aligned with the tip 25 a of the engagement projection 25. Maintain the unlocked state.

Therefore, when the rotation side frame 11 is rotated, the guide portion 20 is rotated together with the elevating engagement portion 18 and the concave / convex engagement portion 21 is also rotated, so that the tip 25a of the engagement protrusion 25 gets over the recess and engages. To come into contact with the outer wall surface of the protrusion 23.
As a result, the pressing operation portion 15 that has been pushed in via the operating member 17 by the urging force of the springs 6 and 14 is raised to the original position.
As the actuating member 17 is raised, the outer tooth portion 19 of the elevating engagement portion 18 meshes with the inner tooth portion 5 of the fixed engagement receiving portion 4 to be in the locked state, so that the rotation side frame 11 is rotated by a predetermined angle. Return to the locked state.
Therefore, the fixed frame 3 can be opened by a predetermined angle by rotating the rotation-side frame 11 by an interval between the adjacent recesses 22 formed in the concave-convex engagement portion 21.
In the illustrated example, the recesses 22 are formed so as to be able to rotate 45 degrees only at the beginning from the closed position toward the open position at intervals of 22.5 degrees, but the angle can be arbitrarily set.

In this embodiment, the movable member 12 rotates in six steps (0 to +135 degrees) at intervals of 22.5 degrees in the + direction (outward) around 0 degrees arranged on the same line as the fixed member 2. , And 6 directions (0 to -135 degrees) in the-direction (see FIG. 2).
In the case of the closed position lock in which the position of the movable member 12 indicated by the solid line in FIG. 2 is 0 degree (closed position), the pressing operation unit 15 is pushed down by the spring 5, and the lock member 18 is also connected via the operating member 17. Ascending, the one turning lock component 4 and the other turning lock component 14 are engaged, and the rotation of the movable member 12 is locked.

That is, when the rotation side frame 11 is in a closed position that is different from the fixed side frame 1 and extends in parallel, the concave and convex engaging portion 21 is above the engaging protrusion 25 and the internal tooth portion 5 of the fixed engaging receiving portion 4. And the external tooth portion 19 of the elevating engagement portion 18 are engaged (engaged), and the rotation side frame 11 is locked.
When the actuating member 17 is lowered by the pressing operation unit 15, the locking projection 25 enters and engages with the bottom surface (denoted as 22 a) of the recess serving as the reference position of the guide unit 20.
As a result, the raising of the actuating member 17 is restricted and maintained in the unlocked posture, but if the concave bottom portion of the concave portion 22 is long, the rotary shaft portion 16 can be rotated accordingly.
In the present embodiment, the concave portion 22a has a concave bottom portion having a length of 45 ° with the axis of the guide portion 20 as the center, so that the rotary shaft portion 16 can be rotated 45 degrees (FIG. 14). 15).
When the rotating shaft portion 16 is further rotated and the engaging protrusion 25 gets over the recess 22a and comes into contact with the adjacent protrusion 23a, the restriction of the unlocking posture is released, so that the lift engaging portion 18 is raised. The rotated outer tooth portion 19 is engaged with the inner tooth portion 5 and the rotation is locked.
Similarly, when the actuating member 17 is lowered, the engaging protrusion 25 is engaged with the recess 22b adjacent to the protrusion 23a. Since the recesses 22c after the recesses 22b are spaced at an interval of 22.5 degrees, the movable member 12 is rotated at intervals as shown in FIG. Can be opened.

In the above-described embodiment, an example in which the rotation side frame and the movable member are arranged on the upper side and the fixed frame and the fixing member are arranged on the lower side is shown.
Further, in FIG. 15, it can be rotated left and right around the center protrusion 23 in the figure, but only one of them may be rotated.
In addition, the present invention is not limited to the above-described embodiments. In short, various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Fixed side frame 2 Fixed member 3 Fixed side cylinder part 3
4 Fixed engagement receiving part 4
5 Internal teeth 6 Coil spring (upper part)
7 1st bearing part 8 2nd bearing part 8a Spring receiving part 9 Sliding part 9a Flange 9b Through hole 10 Rotating structure 11 Rotating side frame 12 Movable member 13 Movable side cylinder part 13a First hollow part 13b Second hollow part 13c First 3 Hollow part 13d Locking protrusion 14 Coil spring (lower part)
15 Press operation unit 15
16 Rotating shaft portion 16a Vertical hole 16b Long hole 17 Actuating member 18 Locking member 18 Lifting engagement portion 18a Engaging hollow portion 18b Expanding hollow portion 19 External tooth portion 20 Guide portion 21 Concavity and convexity engaging portion 21a Inclined surface 22 Recessed portion 23 Protruding portion 25 engaging protrusion 26a upper rotating surface 26b lower rotating surface 27 lower shaft portion e hole P connecting pin

Claims (5)

In the rotating structure that controls the rotation and locking of the rotation side frame provided between the bedside fixed side frame and the rotation side frame,
A fixing member having a fixed side cylindrical portion provided on the fixed side frame;
A movable member formed on the rotation side frame and having a movable side cylindrical portion provided coaxially with the fixed side cylindrical portion;
A pressing operation part whose upper end protrudes upward and a base end is inserted into the movable side cylinder part or the fixed side cylinder part and is urged upward in the unlocking direction, and an operation member fixed to the pressing operation part and extending downward When,
A rotating shaft that is fixed to the movable member and that is rotatably supported in the hollow of the fixed side cylindrical portion, and extends vertically along the axis of the rotating shaft, and the operating member is fitted up and down freely. A vertical hole,
A fixed engagement receiving portion having an inner tooth portion fixed to the inner peripheral wall of the fixed-side cylinder portion;
An external tooth portion that engages with and disengages from the internal tooth portion, moves up and down along the outer peripheral surface of the rotating shaft portion in conjunction with the operating member, and is rotatable in conjunction with the rotating shaft portion; It is displaced to a lock position that engages with the engagement receiving portion and a lock release position that is separated from the fixed engagement receiving portion, and the rotation of the rotation shaft portion is restricted at the lock position, and the rotation shaft portion at the lock release position. Elevating engagement part that enables rotation;
A guide part that moves up and down along the outer peripheral surface of the rotating shaft portion in conjunction with the operating member and is rotatable in conjunction with the rotating shaft portion, and has a concave and convex engaging portion on the outer peripheral surface;
Rotating and operating members of the rotating shaft portion that are provided on the inner wall surface of the fixed-side cylinder portion and are detachably engaged with the concave portions of the concave and convex engaging portions of the guide portion at the unlocking position of the lifting and lowering engaging portion. A bedside frame rotating structure comprising an engaging portion that restrains an upward displacement until a predetermined force is applied to the rotating shaft portion.   The inner tooth portion of the fixed engagement receiving portion is formed in a tapered shape that gradually expands downward, and the outer tooth portion of the elevating engagement portion gradually expands downward so as to engage with the inner tooth portion. The bedside frame rotating structure according to claim 1, wherein the bedside frame rotating structure according to claim 1 is formed in a tapered shape and can come into surface contact when engaged. A slot corresponding to the length between the engagement position and the engagement release position of the lifting / lowering engagement part is formed in the rotation shaft part,
The operating member is provided with a connecting member that passes through the elongated hole and fixes the elevating engagement portion and the guide portion,
The elevating engagement portion and the guide portion are simultaneously raised and lowered through the elongated hole by raising and lowering the operating member, and the raising and lowering engagement portion and the guide portion are simultaneously rotated by rotation of the rotating shaft portion. The bedside frame rotation structure according to 1 or 2. The connecting member consists of a connecting pin fixed to the actuating member
The connecting pin is fixed to the elevating engagement portion and the guide portion via a sliding portion that slides up and down along the outer peripheral surface of the rotating shaft portion. The bedside frame rotation structure according to claim 1. The guide portion has a belt-like raised portion that rises annularly along the outer peripheral surface, and the raised portion is an inclined surface in which the intermediate position protrudes most in the radial direction, and the lower portion of the raised portion gradually protrudes toward the intermediate position. The upper portion of the raised portion is formed with a recessed portion formed with a latching step portion between the intermediate position, and a protruding portion that protrudes in the same plane as the intermediate position and extends to the upper position from the recessed portion,
The engaging portion is composed of a plunger whose tip is projected and retracted toward the axis of the rotating shaft portion, and engages with the concave portion of the guide portion when the tip of the plunger protrudes to restrain the raising of the operating member to rotate the rotating shaft portion. Rotate along the angular spacing of the recesses,
When the tip of the plunger retracts and comes out of the recess and comes onto the protrusion, the guide member rises over the tip of the plunger by the spring that urges the rotating shaft upward, and the fixed engagement receiving portion and the lifter The bedside frame rotation structure according to any one of claims 1 to 4, wherein the joint portion engages to lock the rotation of the rotation shaft portion.

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