JP5499394B2 - Lock mechanism for moving bars - Google Patents

Description

  The present invention relates to a horizontal rotation lock mechanism for a moving bar used mainly in a bed such as a hospital bed or a home care bed.

  Bed B, which is used for nursing care in hospitals and homes, is configured so that side rails can be attached to the bed to prevent futons from falling off and the patient or healer from falling. This side rail is composed of a fixed fence portion fixedly attached to a side frame provided on the side portion of the bed main body portion, and a rotating fence portion provided at one end of the fixed fence portion so as to be horizontally rotatable. It is. This rotating fence is horizontally rotatable so that it does not interfere with the patient's ascending and descending to the bed and can be used as a handrail to be grasped when the bed ascends and descends.

  In order to use the rotating fence as a handrail, it is necessary to fix the rotating fence at a position that is horizontally rotated by a predetermined angle. For this reason, conventionally, it is configured so that the rotating fence portion is fixed so that it does not rotate with respect to the fixed fence portion by tightening the lever, and the rotating fence portion can be horizontally rotated freely by loosening the lever. (For example, see Patent Document 1).

However, in the method of fixing the rotating fence part by tightening the lever as described above, a strong force is required for the lever operation. If the lever is not sufficiently tightened, the rotating fence part easily rotates. When using the rotating fence as a handrail, the rotating fence may move unexpectedly. Therefore, this lever system is not suitable for operation by patients who are physically disabled and weak.
In addition, there is a way to reduce the operating force by lengthening the lever, but in this case it is not preferable because clothes and futons will be easily caught and may be unlocked without notice .

In addition, there is a method to fix the rotating fence part by tightening the screw (for example, see Patent Document 2).
However, in this case as well, a strong force is required for tightening the screws, and if the tightening is insufficient, there is a risk that the rotating fence will rotate easily.

  Therefore, instead of a method of fixing the rotating fence by such tightening, an up-and-down sliding method is being studied. This vertical slide system uses fitting means, and by pulling up the rotating fence part, the fitting means can be disengaged and the rotating fence part can be freely rotated horizontally. By lowering the rotating fence, the fitting means is engaged, and the horizontal rotation of the rotating fence is locked.

  In this vertical slide system, it is possible to rotate horizontally by simply lifting the rotating fence, so that even patients with weak force can easily operate, and by simply lowering the rotating fence, The part can be fixed in a non-rotating state, and the danger of the rotating fence part moving when using the rotating fence part as a handrail can be reduced.

JP-A-11-235253 JP 2002-136555 A

  The problem to be solved is that, in the case of the above-mentioned vertical slide system, the fitting means is fitted to fix the turning of the turning fence part by lowering the turning fence part. For example, when the rotating fence part is used as a handrail and is gripped, if the rotating fence part is accidentally pulled up due to the movement of the body, the fitting means may be disengaged. It was a problem.

  The present invention has been made in view of the above points, and can be rotated by pulling up the rotating fence part and fixed at a position rotated by a predetermined angle by lowering the rotating fence part. To provide a rotation lock mechanism for a rotation fence portion that can prevent the rotation fence from being lifted and rotated even if a force for pulling the rotation fence portion is applied by mistake. It is intended.

In the invention of claim 1, mainly from a fixed fence part (4) that can be mounted on a bed and a rotary fence part (6) that is rotatably supported on one side of the fixed fence part (4). In the moving bar (1) configured, the fitting receiving member (9) is fixed to the fixed fence portion (4), and the fitting member (12) is fixed to the rotating fence portion (6). A displacement mechanism (5) configured to hold the rotating fence part (6) stepwise with respect to the fixed fence part (4) by fitting the convex part and the concave part provided on each is provided. On the other hand, in the fitting receiving member (9), there is provided a through hole which becomes a small diameter through hole (9d) from the large diameter through hole (9e) through the tapered portion (9f). The guide boss (14) is fixed to the fitting member (12) so as to protrude downward, and the fitting receiving member (9) A guide hole (14a) is formed in the guide boss (14) in a direction perpendicular to the axial center so as to be positioned above the large-diameter through hole (9e) when the combined member (12) is in the fitted state. In addition, the release rod (15) inserted into the fitting member (12) and the fitting receiving member (9) is fixedly attached with a release boss (17) having an upper end portion as a tapered portion (17a). The guide hole (14a) is configured to close the inside of the hole (14a), and a spherical member (13) having a size protruding from the guide hole (14a) is fitted to the guide rod (14a), while the release rod (15) The lock release button (16) is fixed to the upper end of the lock and the lock release button (16) is urged upward by the spring (20), and the lock plate (18) is fixed to the lower end of the release rod (15). The locking mechanism (2) Characterized in that Bei was.
In the invention of claim 2, in order to release the lock of the lock mechanism (2), the operation direction of the lock release button (16) is directed downward, and the direction of releasing the fitting state of the displacement mechanism (5) is directed upward. A displacement mechanism (5) and a lock mechanism (2) are provided.
In the invention of claim 3, the lock release button (16) of the lock mechanism (2) is provided on the shoulders (11c) of the concave notch (11b) provided on the cover member (11) of the rotating fence (6). ), And a lock mechanism (2) configured to be unlocked in a state where the lock mechanism is pushed downward.
In the invention of claim 4, based on the bottom surface of the recess (9c) of the fitting receiving member (9), the height of the convex portion (9a) _{(H 9a),} the height of the protrusion (9b) _{(H 9b} ), and based on the bottom surface of the recess (12c) of the fitting member (12), the height of the convex portion (12a) and _{(H 12a),} fit the height _{H 9a} of the protrusion 9a of the fitting receiving member 9 The height H _12a of the convex portion 12a of the combined member 12 is configured to be substantially equal (H _9a ≈H _12a ), and the fitting receiving member (9) of the fitting receiving member (9) when the lock release button (16) is pressed down is formed. By configuring the distance (S ₄ ) between the lower surface and the lock plate (18) to be H _9a > S ₄ > H _9b , the rotation range of the rotating fence (6) is restricted. The displacement mechanism (5) and the lock mechanism (2) are provided.

According to the first aspect of the present invention, the fitting receiving member (9) fixed to the fixed fence portion (4) side as the moving bar (1) and the fitting member (12 fixed to the rotating fence portion (6) side). ) Is equipped with a displacement mechanism (5) that can hold the rotating fence part (6) stepwise at a predetermined angle by fitting the convex part and concave part provided respectively. And the lock mechanism (2) for maintaining the fitting state of this displacement mechanism (5) is in the through hole formed by the fitting receiving member (9), the fitting member (12) and the release rod (15). By restricting the movement of the spherical member (13) in the through hole by the vertical movement of the release boss (17), the vertical movement of the rotating fence (6) can be locked, which is not intended. This has the effect of preventing the displacement mechanism (5) from operating under certain conditions.
In the invention of claim 2, the unlocking method of the lock mechanism (2) is to push the lock release button (16) downward, so that the disengagement state of the displacement mechanism (5) is released. Since (6) is configured to be lifted upward, even if the lock release button (16) is pushed down in an unintended situation, if a reverse force is not applied to the rotating fence (6), the displacement mechanism (5) Since the mating state is maintained, there is an effect that it can be used safely.
In the third aspect of the invention, the lock mechanism (2) is unlocked when the lock release button (16) is pushed into the cover member (11). This prevents malfunction of the lock mechanism (2).
In the invention of claim 4, the distance between the convex portions (9a, 9b, 12a, 12b) and the concave portions (9c, 12c) constituting the displacement mechanism (5) and the fitting receiving member (99 and the lock plate (18)). By setting, the rotation range of the rotating fence (6) can be limited without increasing the number of parts, and it can be configured at low cost.

Cross section of the main part showing the locked state of the locking mechanism Cross-sectional view of the main part showing the unlocked state of the lock mechanism Cross-sectional view of relevant parts showing the state of the lock mechanism when the fitting state of the displacement mechanism is released Explanatory drawing showing the configuration of the lock mechanism Explanatory drawing which shows the bar for movement provided with the locking mechanism and the displacement mechanism Overall plan view showing the moving bar Explanatory drawing showing the action of the displacement mechanism Main part explanatory drawing showing the lock mechanism

  Next, an embodiment of the locking mechanism 2 in the moving bar 1 according to the present invention will be described and described below with reference to the drawings.

  FIG. 5 shows the moving bar 1. The moving bar 1 includes a fixed fence portion 4 that holds the fixed legs 3 and 3 inserted in accessory attachment holes H and H provided in the side frame F of the bed B, and the fixed fence portion 4. It is composed of a rotating fence unit 6 that is connected via a displacement mechanism 5 and a locking mechanism 2 so as to be rotatable in the horizontal direction.

First, the fixed fence 4 is formed by fixing a cover member 8 to a main frame 7 as shown in FIG. More specifically, the main frame 7 has a pipe 7b bent in an L shape fixed to one end of a base pipe 7a, and a connecting pipe 7c fixed between the other end of the base pipe 7a and the pipe 7b. In addition to the frame shape, the main frame 7 is configured by fixing the fixed legs 3 and 3 to the lower surface of the base pipe 7a. Further, a plate 7d having a hole 7e formed as a bearing is fixed to the upper portion of the connection pipe 7c, and a cylindrical fitting receiving member 9 constituting the displacement mechanism 5 is attached to the base pipe 7a. It is fixed so that it has the same axial center as the hole 7e. 7f is a reinforcing member.
The cover member 8 is fixed to the main frame 7 configured as described above to form the fixed fence portion 4. In addition, if a gripping part 8a is provided on the upper part of the cover member 8 as shown in the figure, it can be used as a handrail when getting up on the bed B, making it easy to use.

  Next, the rotating fence 6 will be explained. The rotating fence 6 is formed by fixing a cover member 11 to a bar frame 10. Specifically, the bar frame 10 has a reinforcing member 10b fixed inside the frame pipe 10a and a rotating shaft 10c fixed to the end of the upper horizontal portion of the frame pipe 10a. In addition, a cylindrical fitting member 12 is fixed to the other ends of the reinforcing members 10b and 10b so as to be the same axis as the rotating shaft 10c. The cover member 11 is fixed to the bar frame 10 configured as described above to form the rotating fence portion 6. This cover member 11 can also be used as a handrail when moving from the bed B by providing a gripping portion 11a in the same place as the cover member 8 of the fixed fence portion 4, and is easy to use.

The fixed fence section 4 and the rotating fence section 6 described above are configured such that the rotating fence section 6 is held at a predetermined angle by a displacement mechanism 5. As shown in FIG. 4, the displacement mechanism 5 is configured such that the hole 7 e is supported by the rotating shaft 10 c and is operated by fitting the fitting receiving member 9 and the fitting member 12. .
More specifically, as shown in FIG. 7, convex portions 9a, 9b and concave portions 9c, 9c,... Are continuously provided on the upper part of the fitting receiving member 9, and the convex portions 9a, 9b and concave portions 9c Correspondingly, convex parts 12a, 12b and concave parts 12c are also provided continuously below the fitting member 12. By fitting the convex portions 12a and 12b of the fitting member 12 into the concave portion 9c of the fitting receiving member 9, the rotating fence portion 6 is held at a predetermined angle with respect to the fixed fence portion 4. It is.
In this embodiment, the convex portions 9a and 9b and the concave portion 9c of the fitting receiving member 9 are provided with a phase of 90 degrees, and the convex portion on one side with respect to the plane including the axis of the fitting receiving member 9 is used as a reference. 9a is configured to be higher than the convex part 9b on the other side. In addition, the convex portions 12a and 12b on the fitting member 12 side are configured such that one convex portion 12a is higher than the other convex portion 12b.
More specifically, as shown in FIG. 8, the bottom of the concave portion 9c of the fitting receiving member 9 forms the same plane, and the height of the convex portion 9a is H _9a and the height of the convex portion 9b is H based on this plane. _{When 9b} , H _9a > H _9b .
Similarly, the bottom of the concave portion 12c of the fitting member 12 has the same plane, and when this plane is used as a reference, the height of the convex portion 12a is _H12a, and the height of the convex portion 12b is _H12b . It is configured so that H _12a > H _12b . Further, the height _{H 12a} of height _{H 9a} and the convex portion 12a of the fitting member 12 of the projecting portion 9a of the fitting receiving member 9 has been configured to be substantially equal _{(H 9a} ≒ _{H 12a).}

This is because the projection 12a of the fitting member 12 comes into contact with the side surface of the projection 9a of the fitting receiving member 9 when the pivoting fence 6 is horizontally rotated, so that the rotation operation over a certain angle cannot be performed. (See Fig. 7 (c)). That is, in this embodiment, the rotating fence 6 is displaced on the same plane with respect to the fixed fence 4 and the rotating fence 6 is orthogonal to the fixed fence 4. It is configured and the rotation range is 180 degrees.
However, each of the fitting receiving member 9 and the fitting member 12 as described above provided the convex portions and concave portions, each of the fitting is released by lifting the pivoting fence 6 upward, the rotating fence 6 It only needs to be nationally controlled so that each can be fitted and held at a certain angle when lowered downward, and the shape and number of convex portions and concave portions are not limited to this embodiment.
For example, the fitting member may be provided with only one convex portion. Moreover, it may be configured such that the phase angle between the convex portion and the concave portion is reduced and the rotating fence portion 6 can be fixed at a finer angle.

The above-mentioned displacement mechanism 5 is provided with the lock mechanism 2 so that the fitted state is not released. This locking mechanism 2 regulates the vertical slide of the rotating fence part 6 by the position of the spherical member 13, and is configured as follows.
First, the inside of the fitting receiving member 9 is a small-diameter through hole 9d and the lower side is a large-diameter through hole 9e. The small-diameter through-hole 9d and the large-diameter through-hole 9e are tapered through holes (tapered portion 9f). ) Through holes are provided so that they are continuous.
On the other hand, a large-diameter through hole 12d is provided at the upper end portion of the fitting member 12, and a cylindrical guide boss 14 is fixed inside the lower end so as to protrude from the fitting member 12. Guide holes 14a and 14a are formed in the protruding part of the guide boss 14 in a direction perpendicular to the axis.
A release rod 15 is inserted into the through hole of the fitting receiving member 9 and the fitting member 12. An unlock button 16 is secured to the upper end of the release rod 15. A release boss 17 is fixed below the release rod 15. The upper end of the release boss 17 is a tapered portion 17a.
The outer diameter of the release boss 17 is approximately equal to the inner diameter of the guide boss 14. Further, in this embodiment, as shown in FIG. 8, the clearance S ₁ between the large-diameter through hole 9 e of the fitting receiving member 9 and the outer diameter of the guide boss 14, the thickness S ₂ of the guide boss 14, and the guide boss 14 The clearance S ₃ between the inner diameter of the guide rod 14 and the release rod 15 is substantially equal (S ₁ ≈S ₂ ≈S ₃ ), and the radius of the spherical members 13, 13 fitted in the guide holes 14 a, 14 a of the guide boss 14. Is used that is almost equal to these gaps.

The lower end portion of the release rod 15 is provided with a male screw portion 15a, which is inserted through the lock plate 18 and fixed with nut members 19 and 19. The lock release button 16 is urged by the spring 20 in a direction in which the lock plate 18 and the lower surface of the fitting receiving member 9 are in contact, that is, upward.
Here, when pushed in the lock release button 16 spacing S ₄ between the lower surface and the lock plate 18 of the fitting receiving member 9 (the state shown in FIG. 2) is convex fitting receiving member 9 as shown in FIG. 8 parts 9a, 9b of the height _{H 9a,} against _{H 9b,} it adjusted the nut member 19 such that _{H 9a> S 4> H 9b} .

The lock mechanism 2 configured in this way operates as follows.
First, Fig. 1 shows the locked state. At this time, the spherical members 13 and 13 are in a state in which the release boss 17 closes the inner diameter side of the guide hole 14 a, and the spherical members 13 and 13 are large-diameter through holes of the guide holes 14 a and 14 a and the fitting receiving member 9. 9e and taper part 9f. In this state, the spherical members 13 and 13 restrain the guide boss 14 even if the rotating fence 6 is to be lifted upward, so that it cannot be lifted to information. Therefore, in this state, the rotating fence 6 cannot be rotated horizontally, so the rotating fence 6 can be used safely as a handrail.

Next, Fig. 2 shows the unlocked state. This is a state in which the lock release button 16 is pushed down against the spring 20, and at this time, the release rod 15 and the release boss 17 integrated with the lock release button 16 are also pushed down to form a spherical member. 13 and 13 are movable from the large diameter through hole 9e of the fitting receiving member 9 to the release rod 15 side.
In this state, the rotating fence portion 6 can be lifted upward, and when the rotating fence portion 6 is pulled up, the spherical members 13 and 13 are guided by the tapered portion 9f of the fitting receiving member 9, and the release rod 15 Move to the side. If the rotating fence portion 6 is pulled up as it is, the spherical members 13 and 13 are in a space surrounded by the small diameter through hole 9d of the fitting receiving member 9, the guide holes 14a and 14a and the release rod 15 as shown in FIG. The lock plate 18 and the bottom surface of the mating receiving member 9 are pulled up. In this state, the mating state between the mating receiving member 9 and the mating member 12 is released, and the rotating fence 6 is in a rotatable state.
In this embodiment, since the convex portion 12a of the fitting member 12 is configured to contact the side surface of the convex portion 9a of the fitting receiving member 9, the same plane is formed with respect to the fixed fence portion 4. And it can be fixed at three places in the orthogonal state.
After the rotating fence 6 is horizontally rotated so that a desired angle is obtained, when the rotating fence 6 is lowered, the fitting receiving member 9 and the fitting member 12 are engaged, and the horizontal rotation is performed. Will be constrained.
At this time, since the release rod 15 by the spring 20 is pulled upward, the tapered portion 17a of the release boss 17 pushes the spherical members 13 outward, automatically locks the pulling operation of the upward pivoting fence 6 It will be in the state shown in Fig. 1.

With the lock mechanism 2 configured as described above, the unlocking operation can be performed by operating the unlock button 16, so there is no fear that the lock will be released by hooking clothes.
And since the locking force of this locking mechanism 2 is configured to be generated mechanically, it becomes a constant locking force regardless of the person operating it and can be used safely.
In addition, the unlocking operation direction of the unlocking button 16 is downward, whereas the direction in which the disengagement state of the displacement mechanism 5 is released is upward, so that malfunction can be prevented and an unintended rotating fence It is configured so that horizontal rotation of part 6 is not performed.
Further, the lock release button 16 is preferably provided a recessed notch 11b to the cover member 11 as shown in FIG. 3 so as not to excessively protrude from the cover member 11, hit foreign objects lock release button 16, as will push down Can be stopped by pushing the concave notch 11b down to the shoulder 11c, reducing the risk of being lowered until it is unlocked, and preventing incorrect operation.
Further, if provided with a gripping portion 11a in the vicinity of the lock release button 16 as shown in FIG. 1, it is possible to operate the lock release button 16 while gripping the grip portion 11a, pulling the Kaidosaku 6 It can also be operated with one hand.
As described above, the lock mechanism 2 according to the present invention is easy to operate and can be unlocked with a light operating force, and is configured not to be unlocked in an unintended situation. It can be used for.

DESCRIPTION OF SYMBOLS 1 Moving bar 2 Lock mechanism 3 Fixed leg 4 Fixed fence part 5 Displacement mechanism 6 Rotating fence part 9 Fitting receiving member 12 Fitting member 13 Spherical member 14 Guide boss 15 Release rod 16 Lock release button 17 Release boss 18 Lock plate

Claims (4)

  A moving bar (4) mainly composed of a fixed fence part (4) which can be mounted on a bed and a rotating fence part (6) which is rotatably supported on one side part of the fixed fence part (4). In 1), a fitting receiving member (9) is fixed to the fixed fence portion (4), and a fitting member (12) is fixed to the rotating fence portion (6). On the other hand, the fitting receiving member is provided with a displacement mechanism (5) configured to hold the rotating fence part (6) stepwise with respect to the fixed fence part (4) by fitting the protruding part and the recessed part. In (9), there is provided a through hole that becomes a small diameter through hole (9d) from the large diameter through hole (9e) through the tapered portion (9f), and is inserted into the small diameter through hole (9d). A guide boss (14) is fixed to the fitting member (12) so as to protrude downward, and the fitting receiving member (9) and the fitting member (12) are fitted. The guide boss (14) is formed with a guide hole (14a) in a direction perpendicular to the axial center so as to be positioned above the large-diameter through hole (9e) when in the state, and the fitting member (12) The release rod (15) inserted into the fitting receiving member (9) is fastened with a release boss (17) whose upper end is a tapered portion (17a) to close the inside of the guide hole (14a). In addition, a spherical member (13) having a size protruding from the guide hole (14a) is fitted in the guide hole (14a), while an unlock button (16) is provided at the upper end of the release rod (15). ) And the lock release button (16) is urged upward by a spring (20), and a lock plate (18) is fixed to the lower end of the release rod (15). Characterized by comprising Movement for the bar that (1).   Displacement characterized in that in order to unlock the lock mechanism (2), the operation direction of the unlock button (16) is downward, and the direction in which the disengagement state of the displacement mechanism (5) is released is upward. The moving bar (1) according to claim 1, comprising a mechanism (5) and a locking mechanism (2).   The lock release button (16) of the lock mechanism (2) is pushed down below both shoulders (11c) of the concave notch (11b) provided on the cover member (11) of the rotating fence (6). The moving bar (1) according to claim 1 or 2, further comprising a lock mechanism (2) configured to be unlocked in a closed state. Relative to the bottom surface of the recess (9c) of the fitting receiving member (9), the height of the convex portion (9a) _{(H 9a),} and the height of the projections (9b) and _{(H 9b),} the engagement member ( relative to the bottom surface of the recess (12c) of 12), protrusion (height 12a) and _{(H 12a),} the height _{H 9a} and the convex portion 12a of the fitting member 12 of the projecting portion 9a of the fitting receiving member 9 Of the fitting receiving member (9) and the lock plate (18) when the lock release button (16) is pushed down , and the height H _12a is substantially equal (H _9a ≈H _12a ). And a displacement mechanism (5) configured to restrict the rotation range of the rotating fence portion (6) by configuring the interval (S ₄ ) with H _9a > S ₄ > H _9b. The locking mechanism (2) is provided. A moving bar (1).

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