JP4650951B2 - Side-lock stay lock mechanism on a supine table such as a bed - Google Patents

Description

  The present invention relates to a stay lock mechanism for a side fence in a supine table such as a bed, in particular, a first stay that is arranged at intervals in the vertical direction and is rotatable about an axis corresponding to the longitudinal direction of the supine table. The second stay is related to a stay lock mechanism for the side fence in the supine stand such as a bed that allows the side fence body to move up and down to the side of the supine stand and can be fixed at the raised position.

  The first fence and the second stay, which are arranged at intervals in the vertical direction and are rotatable about an axis corresponding to the longitudinal direction of the bed, allow the side fence body to move up and down on the side of the bed. As a side fence locking mechanism that can be fixed in the raised position, there is a conventional one disclosed in Patent Document 1, for example.

  FIG. 18 and FIG. 19 show the side fence shown in Patent Document 1 and its locking mechanism. In these drawings, the depth direction corresponds to the longitudinal direction of the bed. Reference numeral 101 denotes a bed, 102 denotes a bed frame, and 103 denotes a bottom. Reference numeral 104 denotes a side fence body, and 105 denotes a mounting bracket provided on the bed frame 102. The side fence body 104 is connected by first and second link arms 106 and 107 connected to the mounting bracket 105. It is supported so that it can move up and down. As shown in the figure, the first and second link arms 106 and 107 can be rotated around the shafts 106a and 106b; 107a and 107b corresponding to the longitudinal direction of the bed 101 by the side rail body 104 and the mounting bracket 105. The first and second link arms 106 and 107, the side rail main body 104, and the mounting bracket 105 constitute a parallel link mechanism.

  The side fence having the above configuration is provided with a lock mechanism having the following configuration. That is, the first link arm 106 is fixed with a lock piece 109 formed with a hook-like portion 108 whose opening is directed downward so as to be rotatable around a shaft 109a. A lock pin 110 with which 109 hook-shaped portions 108 are engaged is provided. Further, an operation lever 111 is provided on the first link arm 106 so as to be rotatable around a shaft 111 a, and the operation lever 111 and the lock piece 109 are connected by an intermediate link 112.

  Reference numeral 113 denotes a spring that urges the lock piece 109 in a direction in which the hook-shaped portion 108 engages with the lock pin 110, and reference numeral 114 is connected between the first link arm 106 and the mounting bracket 105. It is a damper.

  In the above configuration, the side fence body 104 is raised by the rotation of the first and second link arms 106 and 107, and the hook-like portion 108 of the lock piece 109 is locked by the bias of the spring 113 as shown in FIG. When engaged with the pin 110, the first link arm 106 is prevented from descending, and thus the side fence body 104 is held in a state where it is raised at the side of the bottom 103.

  Next, when lowering the side fence body 104 to the retracted position, when the operation lever 111 is rotated in the direction of the arrow in the figure, that is, in the counterclockwise direction, the intermediate link 112 moves to the right side in the figure and the lock piece 109 is moved. Since it is rotated in the clockwise direction in the figure, the lock piece 109 is rotated as indicated by a two-dot chain line in the figure, and the engagement with the lock pin 110 is released.

Accordingly, in this released state, as shown in FIG. 19, the first and second link arms 106 and 107 can rotate clockwise in the drawing to lower the side fence body 104 and reach the storage position. it can.
Japanese Patent No. 3321174

  In the above-described conventional lock mechanism, since the intermediate link is connected between the lock piece to be engaged with the lock pin and the operation lever, the number of parts increases and the number of assembling steps increases, resulting in an increase in cost. There was a problem.

  In addition, since the operation force by the operation lever is not directly transmitted to the lock piece, it is difficult to know from the outside whether or not the operation has been performed reliably.

  The lock pin that engages the hook-shaped engagement part of the lock piece is provided on the mounting bracket of the bed frame, and it is not practical to increase the distance from the lock pin to the operation lever. There are few degrees of freedom.

  An object of the present invention is to solve the above conventional problems and to provide a stay lock mechanism for a side fence in a supine table such as a bed that can be reliably operated with a small number of parts.

  Another object of the present invention is to make it possible to easily and reliably know from the outside whether or not the operation by the operation lever is being performed reliably.

In order to solve the above-described problems, in the present invention, each of the link arms of the first stay and the second stay configured by connecting a support member of a mechanism element between a pair of link arms arranged on the left and right respectively . One end side is attached to the side rail body attachment member, and the other end side is attached to the bed frame attachment member so as to constitute a parallel link mechanism, respectively, and arranged in the vertical direction, respectively, in the longitudinal direction of the bed. The first fence and the second stay allow the side fence body to be moved up and down on the side of the bed and fixed at the raised position. In the side fence, the support member of the first stay is rotatably supported by a lock piece formed with a hook-shaped portion and an operation lever for operating the lock piece, and the support member of the second stay is Above hook shape Supports the lock pin that can be engaged, and the lock piece is provided with a biasing means in the direction of the lock pin, and a fork-like portion is provided, and the engagement portion that engages with the fork-like portion so as to be relatively movable is operated. This paper proposes a stay lock mechanism for side fences on a supine table such as a bed with a structure provided on a lever.

Further, in the present invention, as another configuration, one end side of each of the link arms of the first stay and the second stay configured by connecting a support member of a mechanism element between a pair of link arms arranged on the left and right respectively . Arranged on the side rail body attachment member and the other end side on the bed frame attachment member at intervals in the vertical direction so as to constitute a parallel link mechanism, respectively corresponding to the longitudinal direction of the bed A side fence that is configured so as to be rotatable around an axis, and that allows the side fence body to be moved up and down on the side of the bed and fixed in the raised position by these first stay and second stay. And the support member of the first stay is rotatably supported by a lock piece having a hook-like portion formed on the support member of the first stay and the operation lever for operating the lock piece, and the hook-like portion is provided on the support member of the second stay. Can be engaged A lock pin is supported, and a fork-like portion is provided on the operating lever, and an engaging portion that engages with the fork-like portion so as to be relatively movable is provided on the lock piece, and the lock piece is biased toward the lock pin. We propose a stay lock mechanism for side fences on a supine table such as a bed.

  According to the present invention, in the above configuration, the pair of link arms of the first stay proposes a stay lock mechanism for a side fence in a supine table such as a bed arranged outside the pair of link arms of the second stay.

According to the present invention, in the above configuration, the support member of the first stay is provided with a front cover that enables operation of the operation lever, and the operation lever is normally engaged with the lock pin by the hook-shaped portion of the lock piece. The side lock stay lock mechanism in the supine bed such as a bed that has a position where the front part does not protrude from the surface of the front cover when the operation lever is operated, and is provided to a position protruding from the surface of the front cover when the operation lever is operated Propose.

Further, the present invention proposes a stay lock mechanism for a side fence in a supine bed such as a bed that protrudes from the surface of the front cover when the operation lever is operated and has a different color portion on the side surface of the operation lever. .

  Further, according to the present invention, in the above-described configuration, the operation lever is provided with a rotation restricting contact portion that contacts the support member of the second stay during movement in the operation direction. Propose mechanism.

  In the present invention, the operation force by the operation lever is directly transmitted to the lock piece by the fork-like portion and the engagement portion movably engaged with the fork-like portion, so that the engagement release operation from the lock pin of the lock piece is ensured. Can be done.

  Further, in the present invention, since a member such as an intermediate link is not interposed between the operation lever and the lock piece, the operation can be performed reliably as described above, and the number of parts can be reduced, so that the cost can be reduced. .

  When the hook-shaped part of the lock piece is normally engaged with the lock pin, the front part of the lock piece is positioned so as not to protrude from the surface of the front cover, and is arranged so as to protrude from the front cover when the operation lever is operated. In this case, when an operation for engaging the hook-shaped portion of the lock piece with the lock pin is performed, whether the front surface of the operation lever protrudes or not is visually confirmed, It is possible to know from the outside whether the engagement is halfway.

  For example, if a different color portion is formed on the side portion protruding from the front cover when the operation lever is operated, the visual recognition is easy.

  Further, if the operation lever is provided with a rotation restricting contact portion that contacts the support member of the second stay in the movement in the operation direction, it is possible to prevent damage to the mechanism element due to an unreasonable operation of the operation lever.

Next, an embodiment of a stay lock mechanism for a side fence in a supine table such as a bed according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a bed to which a stay lock mechanism of the present invention is applied, and FIG. 2 is a front view. Reference numeral 1 generally indicates a bed, 2 is a bed frame configured to be movable up and down above the base 3, and 4 is divided into a plurality of floor portions 4a, 4b, 4c, and 4d, and has a raised and lowered posture. The bottom that is possible. Reference numeral 5a is a headboard, 5b is a footboard, 6a is a hand operating device for operating the raising and lowering of the bottom 4, and 6b is a care operating device for a caregiver such as a nurse to operate the raising and lowering of the bottom 4. It is. Reference numeral 7 generally indicates a side fence according to the present invention. Since the operation of the bed 1 described above is obvious, the description thereof is omitted.

  The side fence 7 according to the present invention is generally composed of a side fence body 8 and a mechanism portion 9, and the mechanism portion 9 is provided with an attachment frame 10 for attaching to the bed frame 2. Next, details of the mechanism unit 9 will be described. At this time, FIGS. 3 and 4 to be referred to are perspective views of the side fence 7 removed from the bed 1 from the front side and the back side, respectively. FIG. 6 is a perspective view seen from the front side with the side fence body 8 and the front cover of the mechanism part 9 removed, and FIG. 6 is an enlarged view of the main part of FIG. Further, FIGS. 7 to 9 are enlarged cross-sectional views of main parts cut along line AA in FIG.

  That is, the side fence according to the present invention is arranged at intervals in the vertical direction, and the first stay 13 and the first stay 13 that are rotatable around the shafts 11a, 11b; 12a, 12b corresponding to the longitudinal direction of the bed 1 are arranged. With the two stays 14, the side fence body 8 can be moved up and down on the side of the bed 1 and can be fixed at the raised position. The mechanism that can be fixed in the raised position is the stay lock mechanism 15 in the present invention.

  As shown in the figure, the first stay 13 and the second stay 14 are configured by connecting support members 18 and 19 between a pair of link arms 16 and 17 arranged on the left and right, respectively. In this configuration, the pair of link arms 16 of the first stay 13 is disposed outside the pair of link arms 17 of the second stay 14.

  The support member 19 of the second stay 14 has a plate shape, and a lock pin 21 is supported on the support member 19 by a support frame 20.

  On the other hand, the support member 18 of the first stay 13 is formed in a bent plate shape that straddles the link arm 17 of the second stay 14 and protrudes in the direction of the support member 19 between the link arms 17. An operation lever 23 is rotatably fixed to the support member 18 by a shaft 22, and a plate-like portion 24 is formed on the upper portion of the operation lever 23, and a support frame 25 protruding from the plate-like portion 24 has a rod shape. A portion 26 is formed. Further, a lock piece 29 is rotatably supported by the support member 18 on a shaft 28 supported by a support frame 27. The lock piece 29 has the shaft 28 positioned at an intermediate position in the vertical direction, a hook-shaped portion 30 that can be engaged with the lock pin 21 is formed at the upper portion, and a fork-shaped portion 31 is formed at the lower portion. Is formed. The bar-shaped portion 26 is engaged with the fork-shaped portion 31 so as to be relatively movable. Further, the lock piece 29 is provided with a torsion coil spring 32 and is urged in a direction to engage with the lock pin 21. Further, on the front side of the plate-like portion 24 of the operation lever 23, a rotation restricting contact portion 33 that contacts the plate-like support member 19 of the second stay 14 and restricts the rotation in the turning operation of the operation lever 23. Is formed. Reference numeral 34 denotes an attachment member to the side fence body 8.

  The mechanism portion 9 composed of the above components is covered with a front cover 35 that enables the operation lever 23 to be operated.

  In the above configuration, when the side fence body 8 is raised in parallel by the rotation of the link arms 16 and 17 constituting the first and second stays 13 and 14, as shown in FIGS. The hook-like portion 30 of the lock piece 29 is engaged with the lock pin 21 by the urging of the torsion coil spring 32, so that the relative movement of the first stay 13 and the second stay 14 becomes impossible. Accordingly, the side fence body 8 is held in a state of being raised at the side of the bottom 4.

  Next, when lowering the side fence body 8 to the retracted position, if the operation lever 23 is rotated in the direction of the arrow in FIG. 7, that is, counterclockwise, the support frame 25 of the plate-like portion 24 of the operation lever 23 is moved. The provided bar-like portion 26 pushes the lock piece 29 while relatively moving in the fork-like portion 31 to rotate the lock piece 29 counterclockwise against the torsion of the coil spring 32. Thus, when the lock piece 29 is rotated counterclockwise, the hook-like portion 30 of the lock piece 29 is detached from the lock pin 21 as shown in FIG.

  When the hook-like portion 30 of the lock piece 29 and the lock pin 21 are thus disengaged, the first stay 13 and the second stay 14 can be moved relative to each other, and the link arms 16 and 17 can be rotated. Lowering is possible, and the storage position shown in FIG. 14 can be reached through the states of FIGS. 11 to 12 and 13. 15 shows a perspective view of the side fence 7 in the state of FIG. 12 as seen from the back side. Similarly, FIG. 17 is a perspective view of the side fence 7 in the state of FIG. 14 as seen from the back side. 16 is a perspective view of the side fence 7 in the state of FIG. 14 as viewed from the front side.

  As described above, in the present invention, the operation lever 23 and the lock piece 29 are directly operated by the engagement between the rod-like portion 26 and the fork-like portion 31 without using an intermediate member such as an intermediate link as in the conventional technique described above. Since the force is transmitted, the operation can be performed smoothly and reliably. Moreover, since an intermediate member is unnecessary, the number of parts can be reduced and cost can be reduced.

  In this embodiment, since the rotation restricting contact portion 33 is formed on the front side of the plate-like portion 24 of the operation lever 23, the rotation operation of the operation lever 23 more than necessary can be prevented, and the lock It is possible to prevent damage due to an excessive load applied to the mechanism element such as the piece 29.

  In order to put the side fence body 8 in the retracted state into use, when the side fence body 8 is lifted, the link arms 16 and 17 constituting the first stay 13 and the second stay 14 are rotated and lifted together with the side fence. The body 8 can be raised in parallel and brought to the use position.

  When the side fence body 8 rises to the use position, the hook-like portion 30 of the lock piece 29 gets over the lock pin 21 and engages, and as described above, the first stay 13 and the second stay 14 cannot move relative to each other. The lowering of the link arms 16 and 17 is prevented, so that the side fence body 8 is held in the raised state at the side of the bottom 4 and can be used safely.

  However, in the engaging operation of the hook-shaped portion 30 to the lock pin 21 described above, the movement of the hook-shaped portion 30 is hindered for some reason, and the hook-shaped portion 30 is moved to the lock pin 21 as shown in FIG. In some cases, a half-engaged state, a so-called half-engaged state, may occur. If it is used without knowing such a half-engagement state, the side fence body 8 may fall inadvertently.

  On the other hand, in this embodiment, the operation lever 23 has a front portion protruding from the surface of the front cover 35 in a state where the hook-shaped portion 30 of the lock piece 29 is normally engaged with the lock pin 21. The front portion of the operation lever 23 protrudes from the front cover 35 in a state in which the operation lever 23 is not normally engaged. Can be confirmed from the outside, and a safe use state can be obtained by operating again so that it can be normally engaged.

In this case, for example, by forming a different color portion (not shown) in the side surface portion 37 of the operation lever 23 that protrudes from the surface 36 of the front cover 35 when operating, the protrusion from the surface 36 of the front cover 35 of the operating lever 23, It can be visually recognized by the difference in the color of the different color portion, and it is very easy to visually recognize whether or not the operation lever 23 protrudes .

  In the embodiment described above, the rod-like portion is provided on the operation lever 23 side and the fork-like portion 31 is provided on the lock piece 29 side. Conversely, the fork-like portion and lock piece 29 side are provided on the operation lever 23 side. A bar-shaped portion may be provided.

The present invention is as described above, and has the following advantages.
1. The operating force by the operating lever is directly transmitted to the lock piece by the fork-like portion and the engaging portion movably engaged with the fork-like portion, so that the engagement release operation from the lock pin of the lock piece can be reliably performed. .
2. Since no member such as an intermediate link is interposed between the operation lever and the lock piece, the operation can be performed reliably and the number of parts can be reduced, thereby reducing the cost.
3. When the operation lever is engaged to engage the hook-shaped portion of the lock piece with the lock pin, whether the front surface of the operation lever protrudes or not is visually confirmed. It is possible to know from the outside whether the engagement is half-finished. In this case, visual recognition is easy if a different color part is formed in the side part which protrudes from the front surface of a cover at the time of operation of an operation lever.
4). If the operation lever is provided with a rotation restricting contact portion, it is possible to prevent damage to the mechanism element due to an unreasonable operation of the operation lever.
5. Since the lock operation between the hook-shaped portion of the lock piece and the lock pin is a configuration that prevents relative movement between the first stay and the second stay, the lock pin is compared with the configuration provided in the mounting bracket of the bed frame, The degree of freedom of the installation position of the control lever is high.

  The above-described mechanism of the present invention can be used for a bed, as well as a supine table such as an examination table or a patient carrier.

It is a perspective view of the bed using the mechanism concerning the present invention. It is a front view of the bed using the mechanism concerning the present invention. It is the perspective view which looked at the side fence of the state removed from the bed from the front side. It is the perspective view which looked at the side fence of the state removed from the bed from the back side. It is the perspective view seen from the front side in the state which removed the front cover of the side fence main body and the mechanism part. It is an enlarged view of the principal part of FIG. It is an expanded sectional view of the principal part cut | disconnected by the AA line of FIG. It is an expanded sectional view of the principal part cut | disconnected by the AA line of FIG. 6, and the situation different from FIG. 7 is shown. It is an expanded sectional view of the principal part cut | disconnected by the AA line of FIG. 6, and the situation different from FIG. 7, FIG. 8 is shown. It is principal part sectional drawing which shows the raising / lowering operation | movement of a side fence. It is principal part sectional drawing which shows the raising / lowering operation | movement of a side fence, and has shown the situation different from FIG. It is principal part sectional drawing which shows the raising / lowering operation | movement of a side fence, and has shown another situation. It is principal part sectional drawing which shows the raising / lowering operation | movement of a side fence, and has shown another situation. It is principal part sectional drawing which shows the raising / lowering operation | movement of a side fence, The storage state of the side fence main body is shown. It is the external view which looked at the side fence from the back side. It is the external view which looked at the side fence from the front side in another situation. It is the external view seen from the back side. It is a side view which shows the locking mechanism of the conventional side fence. It is a side view of another situation which shows the lock mechanism of the conventional side fence.

Explanation of symbols

1 bed 2 bed frame 3 base 4 bottom 4a, 4b, 4c, 4d floor 5a headboard 5b footboard 6a hand operating device 6b care operating device 7 side rail 8 side rail body 9 mechanism 10 mounting frame 11a, 11b; 12a, 12b Shaft 13 First stay 14 Second stay 15 Stay lock mechanism 16, 17 Link arm 18, 19 Support member 20 Support frame 21 Lock pin 22 Shaft 23 Operation lever 24 Plate-like portion 25 Support frame 26 Rod-like portion 27 Support frame 28 Shaft 29 Locking piece 30 Hook-like part 31 Fork-like part 32 Torsion coil spring 33 Rotation restricting contact part 34 Mounting member 35 Front cover
36 Front cover surface position
37 Side part 101 Bed 102 Bed frame 103 Bottom 104 Side rail body 105 Mounting bracket 106 First link arm 106a, 106b Shaft 107 Second link arm 107a, 107b Shaft 108 Hook-like part 109 Lock piece 110 Lock pin 111 Operation lever 111a Shaft 112 Intermediate link 113 Spring 114 Damper

Claims (6)

One end side of each of the link arms of the first stay and the second stay configured by connecting a support member of a mechanism element between a pair of link arms arranged on the left and right sides, respectively, as an attachment member to the side rail body, and The other end is attached to the bed frame mounting member and spaced apart in the vertical direction so as to form a parallel link mechanism, and is fixed so as to be rotatable about an axis corresponding to the longitudinal direction of the bed. With the first stay and the second stay, the side fence main body can be moved up and down on the side of the bed and fixed in the raised position on the support member of the first stay. The lock piece formed with the hook-shaped portion and the operation lever for operating the lock piece are rotatably supported, and the support pin of the second stay supports the lock pin with which the hook-shaped portion can be engaged. And above The bed is provided with a biasing means in the direction of the lock pin, a fork-like portion, and an engaging portion that engages with the fork-like portion so as to be relatively movable. Side lock stay lock mechanism on the table. One end side of each of the link arms of the first stay and the second stay configured by connecting a support member of a mechanism element between a pair of link arms arranged on the left and right sides, respectively, as an attachment member to the side rail body, and The other end is attached to the bed frame mounting member and spaced apart in the vertical direction so as to form a parallel link mechanism, and is fixed so as to be rotatable about an axis corresponding to the longitudinal direction of the bed. With the first stay and the second stay, the side fence main body can be moved up and down on the side of the bed and fixed in the raised position on the support member of the first stay. A lock piece formed with a hook-shaped portion and an operation lever for operating the lock piece are rotatably supported, and a support pin of the second stay is supported by a lock pin with which the hook-shaped portion can be engaged. , The above operation record The fork-like portion is provided with a fork-like portion, and an engaging portion for engaging with the fork-like portion is provided in the lock piece, and the lock piece is provided with a biasing means toward the lock pin. A side fence stay lock mechanism on a supine bed such as a bed. The pair of link arms of the first stay are arranged outside the pair of link arms of the second stay, and the stay lock mechanism for the side fence in the supine stand such as a bed according to claim 1 or 2. The support member of the first stay is provided with a front cover that enables operation of the operation lever. The operation lever has a front portion in a state where the hook-shaped portion of the lock piece is normally engaged with the lock pin. The bed according to any one of claims 1 to 3, wherein the bed is arranged so as not to protrude from the surface of the front cover and is brought to a position protruding from the surface of the front cover when the operation lever is operated. Side lock stay locking mechanism on the supine stand. In the supine stand such as a bed according to any one of claims 1 to 4, wherein a different color portion is formed on a side surface portion of the operation lever that protrudes from the surface of the front cover when the operation lever is operated. Side fence stay lock mechanism. The bed or the like according to any one of claims 1 to 5, wherein the operation lever is provided with a rotation restricting contact portion that contacts the support member of the second stay during movement in the operation direction. Side lock stay lock mechanism on the supine stand.

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